• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
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    • 专利摘要:
    METHOD AND SYSTEM FOR DETECTION OF A CONDITION IN AN EXHAUST VENTILATION SYSTEM Systems, devices and methods for determining whether a fire condition exists, based on a state of a cooking appliance, and systems, devices and methods for controlling an exhaust air flow in an exhaust ventilation system based on the state of the cooking appliance. At least one type of sensor generating a pre-defined signal is used to detect a fire condition and an appliance cooking state, the pre-defined signal being applied to a controller which differentiates, in response to the pre-defined signal, at least two cooking states, each of the cooking states corresponding to at least two exhaust flows, which the controller implements in response to the controller differentiation of the two states and whose pre-defined signal is simultaneously used to differentiate a cooking condition. fire, in response to which differentiation, the same controller activates a fire suppression mechanism.
    公开号:BR112014030580B1
    申请号:R112014030580-3
    申请日:2013-06-07
    公开日:2020-12-01
    发明作者:Andrey V. Livchak；Derek K. Schrock；Rick A. Bagwell；Philip J. Meredith
    申请人:Oy Halton Group Ltd；
    IPC主号:
    专利说明:

    RELATED REQUESTS
    [0001] This application claims the benefit of U.S. Provisional Application No. 61 / 656,941, entitled “Fire Supression Systems, Devices, and Methods”, filed on June 7, 2012, which is incorporated herein by reference in its entirety. FIELD
    [0002] The modalities of the present invention generally refer to exhaust control systems, devices and methods including fire suppression. More specifically, the modalities refer to systems, devices and methods for determining whether a fire condition exists, based on a state of a cooking appliance and for controlling the rate of exhaustion, to ensure an excess air exhaustion while ensuring the capture and containment of an exhaust hood. BACKGROUND
    [0003] The well-known fire suppression systems used in cooker hoods or stoves with an oven are mainly concerned with sending a flame retardant over the cooking surface to stop fires by fat or lard, when an indicative temperature of a fire is measured in the hood or in the ducts. The existing fire suppression systems operate by measuring a fixed absolute temperature in the hood or in the ducts, and activating an alarm or the release of a flame retardant, when a previously regulated temperature has been reached. This type of approach, however, does not take into account changes in the exhaust temperature, nor does it consider scenarios in which there is only a flame growth from regular cooking, instead of a fire. SUMMARY
    [0004] In modalities, network-based or rule-based methods combine multiple sensor inputs to generate a status indication, which is used for fire suppression and exhaust flow control by a single set of sensor inputs . In modalities, at least one type of sensor generating a pre-defined signal is used for the detection of a fire condition and an appliance cooking state, the pre-defined signal being applied to a controller, which differentiates in response to the predefined signal, in combination with other sensor signals, at least two cooking states, each of the cooking states corresponding to at least two exhaust flows, which the controller implements in response to the differentiation of the two-state controller and whose pre-defined signal is simultaneously used to differentiate a fire condition, in response to that differentiation, the same controller activates a fire suppression mechanism, such as a water sprinkler or a chemical fire extinguisher.
    [0005] One or more modalities include fire suppression systems and methods in response to a determination that a fire condition exists.
    [0006] One or more modalities include systems and methods for determining whether a fire condition exists, based on an assessment of a heat gain from a cooking appliance, in addition to the measurement of the exhaust hood temperature.
    [0007] One or more modalities include a system and a method for determining whether there is a fire or a flame growth from regular cooking.
    [0008] One or more modalities include systems and methods for determining whether there is a fire condition based on the detection of instantaneous heat emitted from the cooking appliance and the measurement of the rate of change of heat from the cooking appliance.
    [0009] In modalities, instantaneous heat detection can be based on airflow measurements.
    [0010] Air flow measurement and subsequent exhaust flow control may include air flow measurement and exhaust flow control, for example, as described in detail in US Patent Application No. 20110284091, incorporated here as a reference, as if fully established in its entirety here.
    [0011] One or more modalities include a system and a method for determining the fire condition and controlling fire suppression in an exhaust ventilation system positioned above one or more cooking appliances. The system and method may include determining whether a fire condition exists, based on a determination of the apparatus state. The appliance state can include a cooking state, an inactive state, a flame growth state, a fire state, an off state and other states.
    [0012] Determining the appliance status may include measuring an exhaust air temperature in the vicinity of the exhaust hood, measuring a radiant temperature of the exhaust air in the vicinity of the cooking appliance, determining a gain of total heat from the cooking appliance, the determination of a total duration of the heat gain, and the determination of an appliance state based on the measured exhaust air temperature, the radiant temperature, the total heat gain and the duration total heat gain.
    [0013] The exhaust air temperature near the vicinity of the exhaust hood can be measured using a temperature sensor.
    [0014] In modalities, the radiant temperature in the vicinity of the cooking appliance is measured using an infrared (IR) sensor.
    [0015] In a cooking state, it can be determined whether there is a fluctuation in the radiant temperature and the average radiant temperature of the cooking appliance, or that the exhaust temperature is above a minimum exhaust temperature.
    [0016] In an inactive state, it can be determined that there is no radiant temperature fluctuation for the duration of the cooking time and the exhaust temperature is less than a predetermined minimum exhaust temperature.
    [0017] In a state of flame growth, it can be determined that a total heat gain measured from the cooking appliances is less than a predetermined threshold heat gain or that the total heat gain is above the heat gain. predetermined limit heat and the duration of the heat gain is less than a predetermined limit duration.
    [0018] In a fire state, it can be determined that the total heat gain is above the predetermined limit heat gain and the duration of the heat gain is above the predetermined limit duration.
    [0019] In an off state, it can be determined that the average radiant temperature is less than a predetermined minimum radiant performance, and that the exhaust temperature is less than a predetermined ambient air temperature plus the average ambient air temperature of the space in the vicinity of the cooking appliance.
    [0020] The modalities can also include the control of the exhaust air flow in an exhaust ventilation system positioned above a cooking appliance, in which the exhaust air flow is controlled by turning the fan on or off, or by changing the fan speed and the damper position based on the determined appliance status.
    [0021] The modalities can also include the activation of a fire suppression source in a fire suppression system based on the detected apparatus state.
    [0022] In modalities, a fire suppression source is switched off or on based on a detected device state. In embodiments, when the apparatus state is determined to be in a fire state, the flame retardant source is switched on. In embodiments, when the appliance status is determined to be in any other state (off, inactive, cooking or flame growth), the flame retardant source is not switched on.
    [0023] The modalities can still comprise the control of the exhaust air flow in an exhaust ventilation system positioned above a cooking appliance, in which the exhaust flow is changed based on a change in the appliance state.
    [0024] The modalities may also comprise an exhaust ventilation system that includes an exhaust hood mounted above a cooking appliance with an exhaust fan to remove the exhaust gas generated by the cooking appliance, at least one sensor for measurement of a radiant temperature of the cooking appliance, at least one temperature sensor attached to the exhaust hood (in the hood of the hood or in the ducts, for example) to measure the temperature of the exhaust air, and a control module to determine a state of the cooking appliance based on the measured radiant temperature, the exhaust air temperature, the total heat gain from the radiant heat emitted by the cooking appliance, and the duration of the heat gain and for controlling an air flow of exhaustion and activation of a fire suppression system based on the state of the appliance.
    [0025] The modalities can also comprise a control module that controls the exhaust air flow by controlling the speed of an exhaust fan, and at least one balance damper attached to the exhaust hood to control a volume of the exhaust. exhaust air entering a hood duct.
    [0026] In several modalities, the control module can still control the exhaust air flow by controlling a position of at least one motorized balance damper.
    [0027] The modalities may also comprise a control module that controls the activation of a fire suppression (extinction) system, when the apparatus is determined to be in a state of fire. When the fire suppression system is activated, a flame retardant is sprayed from a fire suppression source included in the fire suppression system through one or more nozzles included in the exhaust ventilation system.
    [0028] A modality may include a method of detecting a condition in an exhaust ventilation system that includes an exhaust hood, the method comprising: receiving, in a control module, an exhaust air temperature signal representing an exhaust air temperature in the vicinity of the exhaust hood, the exhaust air temperature signal being generated by a temperature sensor; the receipt, in the control module, of a radiant temperature signal representing a surface temperature of a cooking appliance that generates the exhaust air, the radiant temperature signal being generated by a radiant temperature sensor; the receipt, in the control module, of a pressure signal representing the pressure in the hood; determining the state of the cooking appliance in the control module in response to the received exhaust air temperature signal, the received radiant temperature signal and the pressure signal received; and determining a fire condition in response to the determined apparatus state.
    [0029] The cooking appliance state can include a cooking state, an inactive state, an off state, a flame growth state and a fire state.
    [0030] The determination can further include the determination of a fluctuation in radiant temperature, the rate of radiant heat change, a gain of total radiant heat, and a duration of the rate of radiant heat change.
    [0031] The cooking appliance can be determined to be in the cooking state, when there is a fluctuation in the radiant temperature and the radiant temperature is greater than a predetermined minimum radiant temperature, the cooking appliance is determined to be in the inactive state, when no fluctuation in the radiant temperature is determined, the cooking appliance is determined to be in the off state, when there is no fluctuation in the radiant temperature and the radiant temperature is less than a predetermined minimum radiant temperature, the cooking appliance is determined as being in the state of flame growth, when the total radiant heat gain from the cooking appliance is less than a predetermined limit gain or when the total heat gain is above the predetermined limit heat gain and the duration of the heat gain is less than a predetermined threshold duration, and the co Heating is determined to be in a fire state when the total heat gain is above the predetermined gain limit and the duration of the heat gain is above the predetermined duration limit.
    [0032] When a fire state is determined, a fire suppression system can be activated to extinguish the fire.
    [0033] When an inactive, cooking, off or flame growth state is determined, the control module can extract a signal for a balance damper and / or an exhaust fan to adjust an exhaust flow in the exhaust system. exhaust ventilation.
    [0034] Another modality may include a method of responding to a condition in an exhaust ventilation system that includes an exhaust hood, the method comprising: receiving, in a control module, an air temperature signal from exhaust representing an exhaust air temperature in the vicinity of the exhaust hood, the exhaust air temperature signal being generated by a temperature sensor; receiving, on the control module, a radiant temperature signal representing a surface temperature of a cooking appliance that generates exhaust air, the radiant temperature signal being generated by a radiant temperature sensor; the receipt, in the control module, of a pressure signal representing the pressure in the hood; determining the state of the cooking appliance in the control module in response to the received exhaust air temperature signal, the received radiant temperature signal and the pressure signal received; and the response to the device state determined by extracting a control signal from the control module.
    [0035] The answer may include extracting a signal for a balance damper and / or an exhaust fan to adjust an exhaust flow in the exhaust ventilation system, when the cooking appliance status is determined to be a of the inactive, cooking, off and flame growth states, and the activation of a fire suppression system when the cooking appliance state is determined to be the fire state.
    [0036] Another embodiment may include a fire detection system for cooking applications including an exhaust hood and at least a first and a second detection device, the first detection device measuring a surface temperature of a cooking appliance positioned under an exhaust hood, and the second detection device measuring a hood exhaust temperature.
    [0037] Detection can include the detection and differentiation between intermediate flame growths associated with a regular cooking process and a fire by detecting two fire limits.
    [0038] The system may also include (include) an air flow sensor for measuring the exhaust hood air flow.
    [0039] Detection can also include the measurement of the heat generated by the cooking appliance and a rate of change in the heat of the appliance.
    [0040] Also, a system that evaluates the heat generated by the cooking appliances to determine if a fire has occurred is also exposed.
    [0041] The system can use infrared sensors to measure the heat of the apparatus being emitted.
    [0042] The system can also use pressure measurements to determine exhaust air flows. BRIEF DESCRIPTION OF THE DRAWINGS
    [0043] Figure 1 is a perspective view that diagrammatically illustrates an exhaust ventilation system positioned above cooking appliances and having a fire suppression control system according to various modalities.
    [0044] Figure 2 is a block diagram of an example exhaust air flow and a fire suppression control system according to the exposure.
    [0045] Figure 3 is a flow chart of an example operation routine according to several modalities.
    [0046] Figure 4 illustrates, using simulated data, time, a light intensity profile for IR and filtered and unfiltered optical bands in a cooking scenario.
    [0047] Figure 5 illustrates, using simulated data, time, a light intensity profile for IR and filtered and unfiltered optical bands in a fire scenario. DETAILED DESCRIPTION
    [0048] With reference to figure 1, an example exhaust ventilation system 100 is shown which includes an exhaust hood 105 positioned above a plurality of cooking appliances 115 and provided in communication with an exhaust assembly (not shown) through an exhaust duct 110. A bottom opening of the exhaust hood 105 can be generally rectangular, but can have any other desired shape. The walls of the exhaust hood 105 define an internal volume 185, which communicates with a bottom opening facing downwards 190 at one end of the hood 105 which is positioned on the cooking appliances 115. The internal volume 185 can also communicate with the exhaust set through exhaust duct 110. Exhaust duct 110 can extend upward toward the external ventilation environment through the exhaust set.
    [0049] The exhaust set may include a motorized exhaust fan (not shown), by means of which the exhaust air generated by cooking appliances 115 is sucked into the exhaust duct 110 and expelled to the outside ventilation environment . When the exhaust fan motor is running, an exhaust air flow path 165 is established between cooking appliances 115 and the outside ventilation environment. As air is drawn away from the cooktop area, smoke, air pollutants and other air particles are exhausted to the outside ventilation environment through exhaust duct 110 and the exhaust assembly. One or more pressure sensors 308 can also be included in system 100 for measuring static pressure in the main exhaust duct, as well as a plurality of grease removal filters (not shown) in the bottom opening 190 of the exhaust hood 105 for removing grease and smoke particles from the entrance to the hood exhaust duct 110.
    [0050] The exhaust ventilation system 100 can still include a control module 302, which preferably includes a programmable processor 304 that is operationally coupled to and receives data from a plurality of sensors, and is configured to control the speed of the motorized exhaust fan, which, in turn, regulates the exhaust air flow in system 100. The control module 302 communicates with the motorized exhaust fan, which includes a speed control module, such as a variable frequency drive (VFD) to control the motor speed, as well as one or more motorized balance dampers (not shown) positioned near the exhaust duct 110.
    [0051] The control module 302 is also configured to control the activation and deactivation of a fire suppression mechanism 400 based on the state of the detected cooking appliance. The control module 302 controls the speed of the exhaust fan and the activation of the fire suppression mechanism 400 based on the output of a temperature sensor 314 positioned on or inside the exhaust duct 110, and the output of the temperature sensors infrared (IR) radiator 312, each positioned to face an upper surface of a respective cooking appliance 115. In at least one embodiment, three IR sensors 312 can be provided, each positioned above a respective cooking appliance 115 , so that each of the IR sensors 312 faces a respective cooking appliance 115. However, any number and type of IR sensors 312 and any number of cooking appliances 115 can be used, provided the radiant temperature of each cooking surface is detected. The control module 302 communicates with sensors 314 and 312 and identifies the state of the cooking appliance, based on the sensor readings. The condition of the cooking appliances 115 is determined on the basis of the exhaust air temperature and the radiant temperature detected using multiple motion detectors.
    [0052] Note that radiant temperature sensors may include or be supplemented by one or more IR cameras and one or more optical cameras. A single camera can produce a "color" channel for a video signal, to allow a single video stream to indicate temperature and luminance in a large number of locations in real time. In fact, a single video camera detecting IR color and optical bands can replace all 312 radiant temperature sensors. The combination of optical and Ir signals can be particularly useful in combination. For example, a high sustained infrared signal without a contemporary optical signal can be classified by a controller as a hot grid, while the same IR signal coupled with a strong or floating optical signal can be classified as a fire. The spatial information provided by a camera can still help to distinguish between combined signals.
    [0053] Images, optics, IR or both can have the image processed to generate a reduced dimensionality state vector as an input for training and recognition of fire and cooking events. Many examples of normal cooking and fire conditions can be used to train a supervised learning algorithm, which can then be used to recognize and classify, respectively, normal cooking and fire conditions.
    [0054] Note that any of the modes can be modified by the inclusion of fire control nozzles that have fuse connections. In such an embodiment, a fusible link sprinkler head can be provided with a parallel supply that is controlled by a control valve for the fire suppression system. In the event of a failure of the control system, the fuse connection can open its parallel water supply, causing water to be sprayed at the heat enabling source, presumably a fire.
    [0055] The fire suppression mechanism 400 may include, store and / or regulate the flow of a fire control section including any known source of flame retardant material capable of extinguishing the fire. The fire suppression mechanism 400 may also include a section that communicates with a digital network that interconnects other systems that control and / or indicate status information regarding ventilation fans, filters, lighting, ducts, cooking appliances, cooking ordering, billing, inventory, public address, and / or any other components. For example, a signal can be generated on a network like this to notify occupants and / or fire-fighting agencies of a detected fire condition, in addition to activating the fire suppression process.
    [0056] Although known as separate elements, the nozzles 401 can be integral with the fire suppression mechanism 400. The illustrated structure can be one in which one or more separate nozzles are connected to the fire suppression mechanism 400 by fluid. The nozzles 401 can be strategically positioned within the ventilation system 100, in order to be able to extinguish the fire, regardless of its source. For example, one or more 401 nozzles can be placed in the full or in the fat collection area and one or more 401 nozzles can be positioned directly above the 115 cooking appliance. The 401 nozzles communicate directly with the fire control section of the fire suppression mechanism 400, so that when the mechanism 400 is activated by the control module 302, the flame retardant material is discharged through the nozzles 401. The flame retardant can be any known fire extinguishing material, such as, but not limited to, water or a liquid potassium salt solution.
    [0057] Control module 302 can determine a cooking appliance status (AS) based on the outputs of the exhaust temperature sensor 314 and the radiant temperature sensor of IR 312, and can change the speed of the exhaust fan, as well as the position of the motorized balance dampers in response to the determination of the cooking appliance status (AS). The control module 302 can also activate the fire suppression mechanism 400, based on a detected device state.
    [0058] In one embodiment, a control system is adapted to regulate an exhaust flow in response to a radiant temperature sensor. A first indication signal is generated if multiple cycles of high and low temperatures are indicated at one or more locations on a surface of the cooking appliance in a timer interval with a predefined time profile. This fluctuating radiant temperature regime is explained in U.S. Patent Application No. 20110284091. It can serve as an indicator of a high cooking state to which the control system responds by maintaining a high exhaust volume rate. Fire can be recognized by a signature of paroxysmal and sustained intervals of high radiant temperature. This rapid increase in radiant temperature can be broken down using a high-pass filter (digital post-processing or analog pre-filter) applied to the radiant temperature input. The sustained aspect of the fire event can be derived from a low-pass filter component of the filtered radiant temperature. Another discriminator of grease fires from simply the hot radiant temperature signal from a grill, which is on, but not covered with food, is that a grease fire may, under certain circumstances, have a lower radiant temperature because of slower combustion, due to the lower efficiency of oxygen mixing in this fire, compared to burners on a grill. Another feature that can be used to distinguish a radiant grill from a fire is an optical component. An optical imaging device used in conjunction with the radiant temperature sensor can generate images that can be digitally processed to identify a fire and distinguish it from a hot grill operating under normal conditions.
    [0059] With reference to figure 4, a graph of radiation intensity versus time from simulated data shows radiant temperature, optical intensity and filtered versions of high and low passes of the radiant temperature for a period of time during which the sensors they detect an empty hot grill without food, then the food is put on the hot grill, then the food is turned over once and then again. The signal resulting from the high-pass filtration (HPF) of the IR intensity indicates sudden changes in the turn of the food and a hypothetical spark of drops of fat on hot surfaces, which can ignite and produce a brief flame growth. Flame growth appears in the IR signal and the optical signal. Food turnover and flame growth appear in the HDF signal. The low pass filtered IR (LPF) signal shows that the flame growth has minimal effect, because it is not sustained. Also, the LPF signal can show very little fluctuation in normal condition events. The optical signal is reasonably attenuated. A controller can discriminate between a fire state and a cooking state by recognizing the lack of fluctuation in the LPF signal due to the fact that flame growths are brief, but in a fire, as discussed below, they can be larger and more sustained, leading to a characteristic profile, which can be easily recognized by a microprocessor and used to distinguish a state of fire.
    [0060] With reference to figure 5, a fire starts, as indicated in a cooking scenario which is otherwise identical to that in figure 4. As illustrated, the HPF IR signal fluctuates, as does the IR signal LPF after the fire started. The optical signal can show high levels for a sustained or rapid sequence of intervals and fluctuations that are clearly different from a normal cooking state. It is also notable that the LPF IR signal rises and floats. These aspects can be detected, in combination or independently, by a processor configured for pattern recognition or by signal limitation, in order to indicate a fire state.
    [0061] The optical signal can be generated in the same way as described here with respect to the radiant temperature sensor. This can be a point luminance value or an image. The same goes for the IR signal, which can provide radiant or luminance indications for many independent points in a camera's field of view.
    [0062] The cooking appliance 115 can have a cooking state, an inactive state, a flame growth state, a fire state and an off state. According to various modalities, the method by which the cooking state, the inactive state and the off state and associated exhaust flows Q are determined in detail in WO 2010/065793, attached here as the US Patent Application No. 20110284091.
    [0063] For example, as shown in US Patent Application No. 20110284091, the flow from the individual hood balance damper (Q) can be controlled based on the apparatus state (AS) or state, which can be, for example, example, AS = 1, which indicates that the corresponding appliance is in a cooking state, AS = 2, which indicates that the corresponding appliance is in an inactive state, and AS = 0, which indicates that the cooking appliance correspondent is off (off state). Exhaust temperature sensors 314 and radiant IR sensors 312 can detect the apparatus state and provide the detected state for processor 304 of control module 302. Based on the reading provided by the sensors, control module 302 can change the flow damper flow (Q) in system 100 to correspond to a predetermined air flow (Qdesign), a measured air flow Q (see below) and a predetermined air flow (Qidle). When the detected cooking state is AS = 1, the control module 302 can adjust the air flow (Q) to match the predetermined air flow (Qdesign). When the cooking state is AS = 2, the control module 302 can adjust the air flow (Q) calculated according to the following equation:
    E. when the detected cooking state is AS = 0, the control module 302 can adjust the air flow (Q) to be Q = 0.
    [0064] In particular, as shown in US Patent Application No. 20110284091, cooking, inactive and off states can be determined based on the input received from the exhaust temperature sensors 314 and the IR temperature sensors 312 The exhaust temperature (Tex) and ambient space temperature (Tspace) values can be read and stored in the memory 305 of the control module 302, in order to calculate the exhaust air flow (Q) in the system. The exhaust air flow (Q) can be calculated, for example, using the equation shown above. If the calculated exhaust air flow (Q) is less than the predetermined air flow (Qidle), the cooking state can be determined to be AS = 2 (inactive state) and the exhaust air flow (Q) can be adjusted to match (Qidle). In this case, the fan can be maintained at a speed (VFD) that maintains (Q) = (Qidle). If it is determined that the air flow (Q) exceeds the preset value (Qidle), the appliance status will be determined to be AS = 1 (cooking state) and the control module 302 will be able to regulate the fan speed ( VFD) at (VFD) = (VFDdesign) to maintain the air flow (Q) at (Q) = (Qdesign).
    [0065] The average radiant temperature (IRT), as well as the radiant temperature fluctuation (FRT) emanating from the cooking surface of the appliance can also be measured using IR 312 detectors. If processor 304 determines that the radiant temperature is increasing or decreasing faster than a predetermined limit, and the cooking surface is hot (IRT> IRTmin), then the appliance status will be reported as AS = 1, and a fan speed (VFD) can be regulated for (VFDdesign). When the exhaust hood 105 is equipped with multiple IR sensors 312, by default, if any of the sensors detects a fluctuation in the radiant temperature, then the cooking status (AS = 1) will be reported. When the cooking state is detected, the hood exhaust air flow (Q) can be set to the design air flow (Q = Qdesign) for a pre-set cooking time (TimeCook) (7 minutes, for example). example). In at least one mode, this suppresses control by the exhaust temperature (Tex) signal. Furthermore, if the IR 312 sensors detect another temperature fluctuation in the cooking time (TimeCook), the cooking timer will be reset.
    [0066] On the other hand, if the IR 312 sensors do not detect temperature fluctuations in the pre-set cooking time (TimeCook), the appliance status will be reported as inactive AS = 2, and the fan speed will be modulated to keep the exhaust air flow at (Q) = (Q) calculated according to the equation above. When all IR 312 sensors detect (IRT <IRTmin), and (Tex <Tspace + dTspace), the appliance status will be determined to be OFF (AS = 0) and the exhaust fan will be turned off by setting VFD = 0 Otherwise, the appliance status will be determined to be cooking (AS = 2) and the fan speed (VFD) is modulated to maintain the exhaust flow (Q) at a level calculated according to the equation described above. . The operation can end with the control module 302 regulating the air flow (Q) at the air flow level based on the determined appliance status (AS).
    [0067] A control of the exhaust air flow in the system with motorized balance dampers in the exhaust hood 105 can also be done. The control method can follow substantially similar steps, as described above, except that when a fluctuation in radiant temperature (FRT) is detected by the IR 312 sensors, or when the exhaust temperature (Tex) exceeds a minimum value (Tmin), the device status is determined to be AS = 1 and the control module 302 additionally checks whether the balance dampers are in a fully open position (BDP) = 1, as well as whether the fan speed ( VFD) is below a predetermined design fan speed. If the conditions above are true, the fan speed (VFD) will be increased until the exhaust flow Q reaches the design air flow (Qdesign). If the conditions above are not true, the fan speed (VFD) will be kept at (VFDdesign) and the air flow (Q) will be kept at (Q) = (Qdesign).
    [0068] If there is no radiant temperature fluctuation or the exhaust temperature (Tex) does not exceed a maximum temperature (Tmax), the appliance status will be determined to be the inactive state AS = 2. Additionally, the control module 302 can check whether the balance dampers are in a fully open position (BDP) = 1, and whether the fan speed (VFD) is below a design fan speed. If the answer is yes, the fan speed (VFD) will be increased and the balance dampers will be modulated to maintain the air flow (Q) at (Q) = (Q) (calculated according to the equation described above) .
    [0069] When no radiant temperature is detected and the exhaust temperature is (Tex <Tspace + dTspace), the appliance status is determined to be AS = 0 (off state), the balance dampers are fully closed (BDP = 0) and the exhaust fan is turned off. The appliance status can be stored if the exhaust temperature exceeds the ambient temperature. In the event that the appliance status is determined to be AS = 2, the balance dampers are modulated to keep the fan on to maintain the air flow of (Q) = (Q), which is calculated based on equation shown above. The operation can then be terminated and the exhaust air flow is regulated according to the determined appliance status.
    [0070] In addition to the inactive, cooking and off states described above, as well as in US Patent Application No. 20110284091, a flame growth state and a fire state of the cooking appliances can also be determined, based on the outputs the exhaust temperature sensor 314, the IR radiant temperature sensor 32 and the pressure sensor 308. Using the IR sensors 312 and the pressure sensor 308, the instantaneous total radiant heat emanating from the cooking appliances 115 as well as the rate of change of radiant heat can be measured. Using the exhaust temperature sensor output 314, the duration of the radiant heat gain can also be determined.
    [0071] If the control module 302 determines that the total heat gain measured from the cooking appliances 115 is less than a predetermined threshold heat gain, or that the total heat gain is above the heat gain of predetermined limit and the duration of the heat gain is less than a predetermined limit duration, it will be determined that a flame growth during a regular cooking process has occurred. In this case, the apparatus is in a state of flame growth (AS = 3). When a flame growth state is determined, an associated exhaust flow Q = Qflare-up is calculated, which is an exhaust flow that allows the exhaust generated by the flame growth during cooking to be removed efficiently and well. successful kitchen.
    [0072] If the total heat gain is above the predetermined gain limit and the duration of the heat gain is above the predetermined duration limit, a fire state will be detected. The apparatus is in a fire state (AS = 4). When the apparatus state is indicated as being in a fire state, the control module 302 sends an activation signal to the fire suppression mechanism 400, which then determines whether to activate an alarm, and / or distribute a fire extinguishing material through nozzles 401.
    [0073] Figure 2 shows a schematic block diagram of an exhaust flow control system 300 that can be used in connection with the system shown above 100. The exhaust flow control system 300 includes a control module 302 The control module 302 includes a processor 304 and a memory 305. The control module 302 is coupled to and receives input from a plurality of sensors and devices, including one or more IR sensors 312, which can be positioned on the exhaust hood drum 105, so that the IR sensors 312 face the surface of the cooking appliances 115 and detect the radiant temperature emanating from the cooking surfaces, an exhaust air temperature sensor 314 installed near or in the exhaust plenum or in the exhaust duct 110 for detecting the temperature of the exhaust air that is sucked into the exhaust duct 110, an ambient air temperature sensor (not shown) positioned near the ventilation system 100 for the detection of the air temperature surrounding the cooking appliances 115, one or more pressure sensors 308, which can be positioned near a hood flap window (TAB) for the detection of the accumulation of pressure in the hood 105, and optional operator controls 311. Inputs from sensors 308, 310, 314 and operator controls 311 are transferred to control module 302, which then processes the input signals and determines the status equipment (AS) or status. The control module processor 304 can control the speed of the exhaust fan motor (s) 316 and / or the position of the motorized balance dampers 318 (BD), based on the state of the apparatus. Each cooking state is associated with a particular exhaust flow (Q), as described in WO 2010/065793, attached here as U.S. Patent Application No. 20110284091, as well as described above. Once the control module 302 determines the state the appliance is in, it can then adjust the speed of the exhaust fan 316 and the position of the balance dampers 318 to obtain a predetermined air flow associated with each apparatus state, such as cooking, inactive, flame growth and off states, or can activate the fire suppression mechanism 400 to disperse the flame retardant material through the fire suppression nozzles 401 for extinguishing the fire, if a fire state is detected.
    [0074] In several modalities, the sensors can be operationally coupled to the 304 processor using a conductive wire. The sensor outputs can be provided in the form of an analog signal (for example, voltage, current or similar). Alternatively, the sensors can be coupled to the processor 304 via a digital bus, in which case the sensor outputs can comprise one or more words of digital information. The number and positions of 314 exhaust air temperature sensors and radiant temperature sensors (IR sensors) 312 can be varied, depending on how many cooking appliances and associated hoods, hood collars and hood ducts are present in the system, as well as other variables, such as the length of the hood. The number and position of the ambient air temperature sensors 310 can also be varied, as long as the ambient air temperature around the ventilation system is detected. The number and positioning of the 308 pressure sensors can also be varied, as long as they are installed in the hood duct under high pressure with the exhaust fan for measuring the static pressure (Pst) in the main exhaust duct. All sensors are examples and, therefore, any known type of sensor can be used to fulfill the desired function. In general, the control module 302 can be coupled to sensors 308, 310, 312, 314, fan motors 316 and dampers 318 by any suitable wired or wireless connection.
    [0075] In various modalities, multiple control modules 302 can be provided. The type and number of 302 return window valves and their location in the system can also vary, depending on the complexity and scale of the system as to the number of sensors listed above and their locations in a system.
    [0076] The control module 302 preferably contains a processor 304 and a memory 305, which can be configured to perform the control functions described here. In various embodiments, memory 305 can store a list of appropriate input variables, process variables, process control set points, as well as calibration set points for each hood. These stored variables can be used by the 304 processor during the different stages of checking, calibrating and starting functions, as well as during system operation. Example variables are described in U.S. Patent Application No. 20110284091.
    [0077] In several modalities, the 304 processor can execute a sequence of programmed instructions stored in a medium that can be read on a computer (for example, an electronic memory, an optical or magnetic storage, or similar). The instructions, when executed by the 304 processor, can cause the 304 processor to perform the functions described here. The instructions can be stored in memory 305, or they can be implemented in another medium that can be read in a processor, or a combination of them. The processor 304 can be implemented using a microcontroller, a computer, an application specific integrated circuit (ASIC), or discrete logic components or a combination thereof.
    [0078] In various modalities, the 304 processor can also be coupled to a status indicator or display device 317, such as, for example, a liquid crystal display (LCD), for the extraction of alarms and error codes and other messages for a user. Indicator 317 can also include an audible indicator, such as a horn, a bell, an alarm or the like.
    [0079] In operation, as shown in figure 3, in an example mode, the control module 302 starts a control operation in S1 by directing the sensor (s) 312 in S2 to measure the radiant temperature, the sensor 314 to measure the exhaust air temperature, sensor 310 to measure the ambient air temperature and sensor 308 to measure the pressure in the hood 105. Optionally, the control module 302 also directs other temperature sensors positioned near the appliances cooking temperature 115 for measuring the cooking temperature. In S3, the control module 302 receives an exhaust air temperature input, a pressure sensor input, an ambient air temperature input and an infrared sensor input. The control module 302 then determines in S3 the device status, based on the sensor inputs. The control module 302 also determines in S3 the current exhaust flow (Q). The current exhaust flow is then compared to a desired exhaust flow associated with an appliance state. If the exhaust flow determined is the desired exhaust flow, control will restart. If the determined exhaust flow is not the desired exhaust flow, control will proceed to determine the position of the damper (s) or the speed of the exhaust fan based on the determined state of the appliance. If the determined appliance state is one of a cooking state, an inactive state, an off state or a flame growth state, the control module 302 will proceed to extract a damper position command for the damper (s) ( s) in S4, or an output speed command for the exhaust fan in S5, for regulating the exhaust flow based on the determined appliance status. If the device state determined is the fire state, the control module 302 will send an activation signal to the fire suppression mechanism 400 in S6, which then determines whether to activate an alarm and / or distribute the alarm material. fire extinguishing through the 401 nozzles.
    [0080] The control can then proceed to determine whether the power of the cooking appliance is off, in which case the control ends, or to start the control again, if the power is determined to be still on.
    [0081] In another mode, a system includes a control module 302 coupled to the sensors and the control outputs (not shown). The control module 302 is also coupled to an alarm interface (not shown), a fire suppression interface (not shown) and an apparatus communication interface (not shown). The alarm interface is coupled to an alarm system. The fire suppression interface is coupled to a fire suppression mechanism 400. The application interface is coupled to one or more apparatus 115.
    [0082] In operation, the control module 302 can communicate and exchange information with the alarm system, the fire suppression mechanism 400 and the appliances 115 to better determine the appliance states and an adequate exhaust flow. Also, the control module 302 can provide information for the various systems, so that functions can be coordinated for a more effective operating environment. For example, the control module 302, through its sensors, can detect a fire or other dangerous condition and communicate this information to the alarm system, the fire suppression mechanism 400 and the apparatus 115, so that each device or system can take appropriate action. Also, information from the appliances 115 can be used by the exhaust flow control system to more accurately determine the appliance states and provide more accurate exhaust flow control.
    [0083] In one mode, before operation, system 100 can also be checked and calibrated by control module 302 during the start-up process, in order to balance each hood for a pre-regulated design exhaust and inactive flow, to clean and recalibrate the sensors, if necessary, and to evaluate each component in the system for possible malfunction or breakage. The appropriate alarm signals can be displayed on an LCD display, in the event of a system malfunction, to inform an operator of the malfunction and, optionally, to recover from the malfunction. An example calibration process is described in detail in U.S. Patent Application No. 20110284091.
    [0084] For example, a routine can be executed by the control module 302 to check the system 100, before the flow control operation begins. The routine can start with a self-diagnosis process of the control module. If the self-diagnosis process is OK, the control module 302 can regulate the variable frequency drive (VFD) which controls the speed of the exhaust fan to a preset frequency (VFDidle). Then, the static pressure can be measured by a pressure transducer positioned in the hood TAB window and the exhaust flow can be set to (Q) calculated using the formula above. If the self-diagnosis process fails, the control module 302 can check whether the (VFD) is the pre-regulated (VFDidle) and whether the exhaust air flow (Q) is less than or exceeds (Qidle) by a coefficient of limit air flow. Based on the exhaust air flow reading, the control module 302 generates and extracts appropriate error codes, which can be shown or displayed on an LCD display or other appropriate indicator 317 affixed to the exhaust hood or attached to the module control 302.
    [0085] In another mode, if the exhaust flow (Q) is less than (Qidle) by a missing filter coefficient (K of filter missing), then the error code “check filters and fan” can be generated. If, on the other hand, the exhaust flow (Q) exceeds (Qidle) by a clogged filter coefficient (K of clogged filter), then a “clean filter” alarm may be generated. If the exhaust flow (Q) is in fact the same as (Qidle), then no alarm will be generated, and the routine will end.
    [0086] In another mode, a routine can be performed by the control module 302 to check the system. The routine can begin with a self-diagnosis process. If a result of the self-diagnosis process is OK, the 302 control module can maintain the exhaust air flow (Q) at (Qidle) by maintaining the balance dampers in their original or current position. Then, the static pressure (dp) is measured by the pressure transducer positioned in the hood TAB window, and the exhaust flow is set to (Q) calculated using the exhaust flow equation. If the self-diagnosis process fails, the control module can adjust the balance damper (BD) to an open position and (VFD) to (VFDdesign).
    [0087] The control module 302 can then check if the balance dampers are malfunctioning. If a balance damper is malfunctioning, the control module 302 can open the balance damper. If there is no malfunctioning balance damper, then the 302 control module can check for a malfunctioning sensor in the system. If there is a malfunctioning sensor, the control module 302 can adjust the balance dampers in (BDdesign), the (VFD) in (VFDdesign) and the exhaust air flow to (Qdesign). Otherwise, the control module 302 can set (VFD) to (VFDidle) until the cooking appliance is switched off. This step ends the routine.
    [0088] In various modalities, the hood 105 can be automatically calibrated for the design air flow (Qdesign). The calibration procedure can be activated with all ventilation systems running and the cooking appliances in the off state. The calibration routine can start with the fan turned off. If the fan is off, the hood can be balanced for the design air flow (Qdesign). If the hood is not balanced, the control module 302 can adjust VFD until the exhaust flow reaches (Qdesign). The routine then waits until the system is stabilized. Then, the hood 105 can be balanced to (Qidle) by reducing the speed (VFD). The routine then waits again until the system is stabilized.
    [0089] In another mode, the sensor can also be calibrated. The calibration of the sensor can be done during a first-time calibration mode, and is performed for cold cooking appliances and when there are no people present under the hood. The radiant temperature (IRT) can be measured and compared with a thermostat reading (Tspace), and the difference can be stored in memory 305 of control module 302 for each of the sensors. During subsequent calibration procedures, or when the exhaust system is switched off, the change in radiant temperature is measured again and compared with the calibrated value stored in memory 305. If the reading is higher than a maximum allowed difference, a warning will be generated on the control module 302 for cleaning the sensors. Otherwise, the sensors will be considered calibrated and the calibration routine will be terminated.
    [0090] For a system with multiple hoods, a fan and no motorized balance damper, the calibration routine can follow substantially the same steps as for a single hood, a single fan and no motorized damper system shown above, except for the fact of every hood to be calibrated. The routine starts with Hood 1 and follows hood balance steps, as shown above, as well as sensor calibration steps, as shown above.
    [0091] Once the first hood is calibrated, the air flow to the next hood is checked. If the air flow is at a set point (Qdesign), the sensor calibration will be repeated for the second hood (and any subsequent hood). If the airflow is not at the set point (Qdesign), the airflow and sensor calibration can be repeated for the current hood. The routine can be followed until all hoods in the system are calibrated. The new design air flows for all hoods can be stored in memory 305.
    [0092] An automatic calibration routine can also be performed. During the calibration routine, all hoods are calibrated for a design air flow (Qdesign) at minimum static pressure. The calibration procedure can be activated during the time when it is not planned to use the cooking equipment with all the hood filters in place, and repeated regularly (once a week, for example). After the calibration routine is activated, the exhaust fan can be set to the maximum speed VFD = 1 (VFD = 1 - full speed; VFD = 0 - the fan is off) and all balance dampers fully open (BDP = 1 - fully open; BDP = 0 - fully closed). The exhaust air flow can be measured for each hood using the TAB (PT) window pressure transducer. In different modalities, each hood can be balanced to obtain the design air flow (Qdesign) using the balance dampers. At this point, each BDP can be less than 1 (less than fully open). There may also be a waiting period in which the system stabilizes.
    [0093] If the exhaust air flow is not in (Qdesign), the VFD regulation will be reduced, until one of the balance dampers is fully open. In at least one modality, this procedure can be done in stages by gradually reducing the regulation of VFD by 10% in each iteration, until one of the dampers is fully open and the air flow is (Q) = (Qdesign). If, on the other hand, the air flow is (Q) = (Qdesign), the pressure transducer regulation in the main exhaust duct (Pstdesign), the VFDdesign fan speed and the BDPdesign balance damper position settings can stored, and calibration will be terminated.
    [0094] After a calibration, which may or may not need to be done, the infrared sensors 312, for example, measure the radiant temperature (IRT) of the cooking surface of any one of at least one cooking appliance 115, the sensor ambient air temperature 310 measures the temperature of the space around the cooking appliance, another temperature sensor can measure the cooking temperature, the pressure sensor 308 measures the pressure in the hood, and the exhaust temperature sensor 314 measures the temperature in the exhaust hood. The control module 302 then determines the state of the cooking appliance based on the measured temperatures and pressure. The system and method by which the cooking states, such as the off, inactive and cooking states and the associated exhaust air flows (Q) are determined are included in application WO 2010/065793, attached here as the Application for US Patent No. 20110284091. Flame and fire growth states and associated exhaust air flows (Q) and / or actions to be taken are determined using the system as described here and in US Patent Application N ° 20110284091 attached.
    [0095] According to the first modalities, the exposed subject includes a method of detecting a condition in an exhaust ventilation system including an exhaust hood, the method comprising. The method includes receiving, in a control module, an exhaust air temperature signal represented by an exhaust air temperature in the vicinity of the exhaust hood, the exhaust air temperature signal being generated by a temperature sensor . The method also includes the receipt, in the control module, of a radiant temperature signal representing a surface temperature of a cooking appliance that generates the exhaust air, the radiant temperature signal being generated by a radiant temperature sensor. The method also includes the receipt, in the control module, of a pressure signal representing the pressure in the hood. The method also includes regulating a first flow exhaust flow associated with an inactive state of the cooking appliance in response to the received exhaust air temperature signal received, the received radiant temperature signal and the pressure signal received . The method also includes the regulation of an exhaust flow for a second high flow, higher than the first low flow, associated with a high cooking state of the cooking appliance in response to the received exhaust air temperature signal, when received radiant temperature signal and the received pressure signal and the regulation of a fire suppression mechanism in response to at least one of the received exhaust air temperature signal, the received radiant temperature signal and the received pressure signal .
    [0096] According to variations of the first modalities, the exposed subject includes first additional modalities that include, using the control module and, in response to the radiant temperature, the exhaust temperature and an additional signal, the distinction of a flame growth of a fire grid and the regulation of an exhaust flow and / or the regulation of a fire suppression mechanism in response to the distinction. According to variations of the first modalities, the subject exposed includes first additional modalities in which the additional signal includes an optical luminance signal. According to variations of the same, the subject exposed includes first additional modalities in which the distinction includes the filtering of an optical or radiant temperature signal, in order to detect a temporal fluctuation and the use of a machine classification to recognize the distinction of at least two cooking states and a fire state. According to variations of the same, the subject exposed includes first additional modalities in which the fire suppression mechanism is activated in response to the calculation, by said control module, of a total heat gain above the predetermined magnitude limit combined with a duration of the heat gain being above a predetermined duration limit. According to variations of the same, the subject exposed includes first additional modalities in which the control module includes a processor and a memory with a program stored in memory adapted for the implementation of a machine classification algorithm and for controlling the exhaust flow and the fire suppression mechanism in response to a classifier output from it. According to variations of the same, the exposed subject includes first additional modalities in which the pressure signal is indicative of a flow through the exhaust hood. According to variations of the same, the subject exposed includes first additional modalities in which the regulation of an exhaust flow includes the regulation of an exhaust flow in response to the pressure signal.
    [0097] According to second modalities, the exposed subject includes a method of responding to a condition in an exhaust ventilation system that includes the exhaust hood, the method comprising. The method includes the regulation of an exhaust flow through a ventilation component in response to a first sensor adapted for the detection of a smoke load from a cooking appliance, and the detection of a fire condition in response to the first sensor and the regulation of a fire suppression mechanism in response to the detection. Regulation and detection are carried out by a controller configured to receive signals from the sensor.
    [0098] According to variations of the same, the exposed subject includes second additional modalities in which the ventilation component includes a cooking hood. According to variations of the same, the exposed subject includes second additional modalities in which the controller includes a digital processor adapted to distinguish first and second smoke charge states and to generate a respective command signal for each of the exhaust flows . According to variations of the same, the exposed subject includes second additional modalities in which the digital processor implements a machine classification algorithm. According to variations of the same, the exposed subject includes second additional modalities in which the digital processor implements a machine classification algorithm generated from supervised learning. According to variations of the same, the exposed subject includes second additional modalities in which the digital processor implements an algorithm that responds to whether the first signal is fluctuating temporally or not and to regulate the exhaust flow in response to this. According to variations of the same, the exposed subject includes second additional modalities in which the first sensor includes a radiant temperature sensor or an air temperature sensor. According to variations of the same, the exposed subject includes second additional modalities in which the first sensor includes a camera. According to variations of the same, the exposed subject includes second additional modalities in which the camera is able to form an image in infrared wavelengths. According to variations of the same, the exposed subject includes second additional modalities in which the camera is able to form an image at optical wavelengths. According to variations of the same, the exposed subject includes second additional modalities in which the camera is able to form an image in infrared and optical wavelengths. According to variations of the same, the subject exposed includes second additional modalities that include a low-pass filtering of the signal from the first sensor, in which the regulation is in response to the signal from the first sensor and a result of the filtration of low passes.
    [0099] According to third modalities, the exposed subject includes a method of detecting a condition in an exhaust ventilation system that includes an exhaust hood. The method includes receiving, in a control module, an exhaust air temperature signal representing an exhaust air temperature in the vicinity of the exhaust hood, the exhaust air temperature signal being generated by a temperature sensor and the receipt, in the control module, of a radiant temperature signal representing a surface temperature of a cooking appliance that generates the exhaust air, the radiant temperature signal being generated by a radiant temperature sensor. The method also includes receiving, in the control module, a pressure signal representing the pressure in the hood, and determining in the control module a state of the cooking appliance in response to the received exhaust air temperature signal, when radiant temperature signal received and the pressure signal received. The method also includes the determination of a fire condition in response to the determined appliance status.
    [0100] According to variations of the same, the exposed subject includes third additional modalities in which the state of the cooking apparatus includes a state of cooking, an inactive state, an off state, a state of flame growth and a state of fire , and the control module is configured to generate a respective control signal for each of the detected states, and the method includes the regulation of an exhaust flow and a fire suppression mechanism in response to the respective control signals. According to variations of the same, the subject exposed includes third additional modalities that include the use of the control module and, in response to the radiant temperature, the exhaust temperature and an additional signal, the distinction of a flame growth from a fire grid and the regulation of an exhaust flow and / or the regulation of a fire suppression mechanism in response to the distinction. According to variations of the same, the exposed subject includes third additional modalities in which the additional signal includes an optical luminance signal. According to variations of the same, the exposed subject includes third additional modalities in which the distinction includes the filtering of an optical or radiant temperature signal, in order to detect a temporal fluctuation and the use of a machine classification to recognize the distinction of at least two cooking states and a fire state. According to variations of the same, the exposed subject includes third additional modalities in which the fire suppression mechanism is activated in response to the calculation, by the control module, of a total heat gain above the predetermined magnitude limit combined with a duration of the heat gain being above a predetermined duration limit. According to variations of the same, the exposed subject includes third additional modalities in which the control module includes a processor and a memory with a program stored in memory adapted for the implementation of a machine classification algorithm and for controlling the exhaust flow and the fire suppression mechanism in response to a classifier output from it.
    [0101] The exposed modalities include systems configured for the implementation of any of the preceding methods.
    [0102] The exposed modalities include systems including an exhaust hood configured to implement any of the preceding methods.
    [0103] The exposed modalities include systems including an exhaust hood and a controller configured to implement any of the preceding methods.
    [0104] According to fourth modalities, the exposed subject includes a combined system of fire suppression and exhaust flow control. A controller has at least one first sensor, the controller being configured to generate an exhaust flow command signal to control an exhaust flow in response to a signal from the first sensor. The controller is additionally configured to generate a fire suppression command signal to control a fire suppression mechanism in response to a signal from the first sensor.
    [0105] According to variations of the same, the exposed subject includes fourth additional modalities that include an exhaust fan speed drive connected to the controller, in order to receive the exhaust flow command signal. According to variations of the same, the exposed subject includes fourth additional modalities in which the first sensor. According to variations of the same, the exposed subject includes fourth additional modalities in which the controller includes a cooker hood. According to variations of the same, the exposed subject includes fourth additional modalities in which the controller includes a digital processor adapted to distinguish between first and second smoke charge states and to generate a respective command signal for each flow rate. exhaustion. According to variations of the same, the exposed subject includes fourth additional modalities in which the digital processor implements a machine classification algorithm. According to their variations, the exposed subject includes fourth additional modalities in which the digital processor implements a machine classification algorithm generated from supervised learning. According to variations of the same, the exposed subject includes fourth additional modalities in which the digital processor implements an algorithm that responds to whether the first signal is fluctuating temporally or not and for regulating the exhaust flow in response to this. According to variations of the same, the exposed subject includes fourth additional modalities in which the first sensor includes a radiant temperature sensor or an air temperature sensor. According to variations of the same, the exposed subject includes fourth additional modalities in which the first sensor includes a camera. According to variations of the same, the exposed subject includes fourth additional modalities in which the camera is able to form an image in infrared wavelengths. According to variations of the same, the exposed subject includes fourth additional modalities in which the camera is able to form an image at optical wavelengths. According to variations of the same, the exposed subject includes fourth additional modalities in which the camera is able to form an image in infrared and optical wavelengths.
    [0106] The modalities of a method, a system and a computer program product for controlling the exhaust flow can be implemented in a general purpose computer, a special purpose computer, a programmed microprocessor or microcontroller and a circuit element peripheral integrated, an ASIC or other integrated circuit, a digital signal processor, a wired electronic or logic circuit, such as a discrete element circuit, a programmed logic device, such as a PLD, a PLA, an FPGA, a PAL or similar. In general, any process capable of implementing the functions or steps described here can be used to implement modalities of the method, system or computer program product to control the exhaust flow.
    [0107] Furthermore, the modalities of the method, system and product of a computer program exposed to control the exhaust flow can be readily implemented, fully or partially, in software using, for example, an object or environments of object-oriented software development, which provide portable source code that can be used on a variety of computer platforms.
    [0108] Alternatively, the modalities of the method, system and computer program product exposed to control the exhaust flow can be implemented partially or fully in hardware using, for example, standardized logic circuits or a VLSI design. Other hardware or software can be used to implement modalities depending on the speed and / or efficiency requirements of the system, the particular function and / or a particular software or hardware system, a microprocessor or a microcomputer system being used . The method, system and computer program product modalities exposed for exhaust flow control can be implemented in hardware and / or software using any systems known or later developed, devices or software by those of common knowledge in the technique applicable from the functional description provided here and with a general basic knowledge of the computer, the exhaust flow and / or cooking appliance techniques.
    [0109] Furthermore, the modalities of the method, system and computer program product exposed to control the exhaust flow can be implemented in software, run on a programmed general purpose computer, a special purpose computer, a microprocessor or similar. Also, the exhaust flow control method of this invention can be implemented as a program embedded in a personal computer, such as JAVA® or CGI script, as a resource residing on a server or a graphics workstation, as a routine embedded in a dedicated processing system, or similar. The method and the system can also be implemented by physically incorporating the method to control the exhaust flow in a software and / or hardware system, such as hardware and software systems for exhaust ventilation hoods and / or appliances.
    [0110] Therefore, it is evident that, according to the present invention, a method, a system and a computer program product are provided for controlling exhaust flow, determining a fire condition, and suppressing fire, if a fire condition is detected. Although this invention has been described in conjunction with various modalities, it is evident that many alternatives, modifications and variations would be or are evident to those of ordinary knowledge in the applicable techniques. Therefore, applicants intend to encompass all of these alternatives, modifications, equivalents and variations that are in the spirit and scope of this invention.
    权利要求:
    Claims (10)
    [0001]
    1. Method of detecting a condition in an exhaust ventilation system (100) including an exhaust hood (105), the method characterized by the fact that it comprises: the receipt, in a control module (302), of a exhaust air temperature representing an exhaust air temperature in the vicinity of the exhaust hood (105), the exhaust air temperature signal being generated by an exhaust air temperature sensor (314); the receipt, in the control module (302), of a radiant temperature signal representing a surface temperature of a cooking appliance (115) that generates the exhaust air, the radiant temperature signal being generated by a temperature sensor radiant (312); receiving, at the control module (302), a pressure signal representing the pressure in the exhaust hood (105); regulating an exhaust flow for a first flow associated with an inactive state of the cooking appliance (115) in response to the received exhaust air temperature signal, the received radiant temperature signal and the received pressure signal; and the regulation of an exhaust flow for a second flow, higher than the first flow, associated with a high load cooking state of the cooking appliance (115) in response to the received exhaust air temperature signal, when radiant temperature signal received and pressure signal received; the regulation of a fire suppression mechanism (400) in response to at least one between the exhaust air temperature signal received, the radiant temperature signal received and the pressure signal received, using said control module (302 ), and in response to the said radiant temperature, the exhaust temperature and an optical luminance signal, distinguishing a flame growth from a fire grill and regulating an exhaust flow and / or regulating a fire suppression mechanism ( 400) in response to the distinction.
    [0002]
    2. Method, according to claim 1, characterized by the fact that the distinction includes the filtering of an optical or radiant temperature signal, in order to detect a temporal fluctuation and the use of a machine classification to recognize at least two states cooking and a state of fire.
    [0003]
    3. Method, according to claim 1, characterized by the fact that the fire suppression mechanism (400) is activated in response to the calculation, by said control module (302), of a total heat gain above the magnitude limit predetermined combined with a duration of the heat gain being above a predetermined duration limit.
    [0004]
    4. Method, according to claim 3, characterized by the fact that said control module (302) includes a processor (304) and a memory with a program stored in memory adapted for the implementation of a machine classification algorithm and for control of the exhaust flow and the fire suppression mechanism (400) in response to a classifier output.
    [0005]
    5. Method, according to claim 4, characterized by the fact that the pressure signal is indicative of a flow through the exhaust hood (105), in which the regulation of an exhaust flow includes the regulation of an exhaust flow in response to that pressure signal.
    [0006]
    6. A condition detection system in an exhaust ventilation system (100) including an exhaust hood (105), the system characterized by the fact that it comprises: a cooking appliance (115); a fire suppression mechanism (400); the exhaust ventilation system (100); an exhaust hood (105); an exhaust air temperature sensor (314) adapted to emit an exhaust air temperature signal; a radiant temperature sensor (312) adapted to emit a radiant temperature signal; a control module (302) connected to the exhaust and radiant air temperature sensors (314; 312) and adapted to receive: the exhaust air temperature signal representing an exhaust air temperature in the vicinity of the exhaust hood ( 105); the radiant temperature signal representing a surface temperature of the cooking appliance (115) which generates the exhaust air; and a pressure signal representing the pressure in the exhaust hood (105); where the control module (302) regulates an exhaust flow for a first flow associated with an inactive state of the cooking appliance (115) in response to the received exhaust air temperature signal, the received radiant temperature signal and the pressure signal received; where the control module (302) regulates an exhaust flow for a second high flow, higher than the first flow, associated with the high load cooking state of the cooking appliance (115) in response to the temperature signal of exhaust air received, the radiant temperature signal received and the pressure signal received; wherein the control module (302) regulates the fire suppression mechanism (400) in response to at least one between the received exhaust air temperature signal, the received radiant temperature signal and the received pressure signal; wherein the control module (302), in response to said radiant temperature, the exhaust temperature and an additional optical luminance signal, distinguishes a flame growth from a fire grid; and wherein the control module (302) regulates an exhaust flow and / or regulates the fire suppression mechanism (400) in response to the distinction.
    [0007]
    7. System according to claim 6, characterized by the fact that the control module (302) is programmed to distinguish through the filtering of an optical or radiant temperature signal, in order to detect a temporal fluctuation and the use of a classification machine for recognizing at least two cooking states and a fire state.
    [0008]
    8. System according to claim 7, characterized by the fact that the fire suppression mechanism (400) is activated in response to the calculation by said control module (302) of a total heat gain above the combined predetermined magnitude limit with a duration of the heat gain being above a predetermined duration limit.
    [0009]
    9. System, according to claim 8, characterized by the fact that said control module (302) includes a processor (304) and a memory with a program stored in memory adapted for the implementation of a machine classification algorithm and adapted to control the exhaust flow and the fire suppression mechanism (400) in response to a classifier output from it.
    [0010]
    10. System, according to claim 9, characterized by the fact that the pressure signal is indicative of a flow through the exhaust hood (105), in which the control module (302) regulates an exhaust flow in response to said pressure signal.
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    US10634366B1|2020-04-28|Cooktop ventilation system having a smoke detection and alarm system
    JP6554375B2|2019-07-31|Range food
    CA3120205A1|2020-06-04|Smart indoor air venting system
    WO2017019062A1|2017-02-02|Protecting a computing device from environmental issues in an enclosure
    JPH10281459A|1998-10-23|Combustion equipment
    同族专利:
    公开号 | 公开日
    MX2014014936A|2015-03-09|
    KR20150030695A|2015-03-20|
    AU2018201603A1|2018-03-29|
    JP2015520354A|2015-07-16|
    DK2859276T3|2018-11-19|
    JP6205412B2|2017-09-27|
    US20200023214A1|2020-01-23|
    EP2859276A4|2016-03-09|
    CO7230339A2|2015-03-31|
    EP2859276B1|2018-08-08|
    IN2014KN02869A|2015-05-08|
    AU2013293528A1|2015-01-22|
    CN104520648A|2015-04-15|
    US20150136430A1|2015-05-21|
    AU2020202818B2|2021-10-07|
    HK1251285A1|2019-01-25|
    CA2875803A1|2014-01-30|
    EP3346196A1|2018-07-11|
    PL2859276T3|2019-01-31|
    PE20150551A1|2015-05-06|
    MX349597B|2017-08-04|
    US10434344B2|2019-10-08|
    AU2018201603B2|2020-01-30|
    EP2859276A1|2015-04-15|
    AU2020202818A1|2020-05-21|
    US9662519B2|2017-05-30|
    GB2517633A|2015-02-25|
    BR112014030580A2|2017-06-27|
    CL2014003330A1|2015-07-31|
    AU2013293528B2|2018-03-29|
    US10744356B2|2020-08-18|
    KR101916505B1|2018-11-07|
    SG11201408056YA|2015-01-29|
    CA2875803C|2019-01-29|
    US20170246487A1|2017-08-31|
    WO2014018168A1|2014-01-30|
    CN104520648B|2017-05-24|
    GB2517633B|2016-09-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPS6220221Y2|1979-03-01|1987-05-22|
    JPS55125349A|1979-03-22|1980-09-27|Yamaha Motor Co Ltd|Antifreezing device for carburetor|
    JP2531797B2|1989-08-23|1996-09-04|株式会社ジャパンエナジー|Environmental monitoring equipment|
    KR0135129B1|1994-12-16|1998-04-23|구자홍|Abnormal action detection system of microwave oven|
    CA2169702C|1996-02-16|2001-02-13|Christian Guay|Exhaust hood apparatus|
    US6515283B1|1996-03-01|2003-02-04|Fire Sentry Corporation|Fire detector with modulation index measurement|
    US6170480B1|1999-01-22|2001-01-09|Melink Corporation|Commercial kitchen exhaust system|
    US20110005507A9|2001-01-23|2011-01-13|Rick Bagwell|Real-time control of exhaust flow|
    DE10064621A1|2000-12-21|2002-06-27|Ego Elektro Geraetebau Gmbh|Method and device for recording the temperature of a cooking vessel|
    US7048199B2|2004-01-20|2006-05-23|Melink Corporation|Kitchen exhaust optimal temperature span system and method|
    US6920874B1|2004-03-01|2005-07-26|Robert Paul Siegel|Intelligent ventilating safety range hood|
    CN1984847B|2004-07-16|2011-06-29|株式会社可乐丽|Method of wastewater treatment with excess sludge withdrawal reduced|
    DK1856453T3|2005-03-10|2016-10-10|Aircuity Incorporated|DYNAMIC CONTROL OF DILUTION VENTILATION IN CRITICAL ONE-WAY ENVIRONMENTAL ENVIRONMENTS|
    US8075304B2|2006-10-19|2011-12-13|Wayne/Scott Fetzer Company|Modulated power burner system and method|
    GB2450732B|2007-07-04|2009-09-02|Food Industry Technical Ltd|Air control system and method|
    US20090061752A1|2007-08-28|2009-03-05|Current Energy Controls, Lp|Autonomous Ventilation System|
    CN201141651Y|2007-12-26|2008-10-29|叶竹勤|Self-extinguishing fume exhauster|
    DE102008041390A1|2008-08-20|2010-02-25|BSH Bosch und Siemens Hausgeräte GmbH|Hob device|
    SG171458A1|2008-12-03|2011-07-28|Halton Group Ltd Oy|Exhaust flow control system and method|
    CN101592348A|2009-06-11|2009-12-02|夏志生|Integrated side-suction type range hood and kitchen range|
    US20110254939A1|2010-04-16|2011-10-20|Tatiana Pavlovna Kadantseva|Detecting User Input Provided To A Projected User Interface|
    US20120055275A1|2010-09-02|2012-03-08|Streivor Air Systems, Inc.|System and Method for Smart Operation of an Exhaust Hood Using a Protected Monitoring Device|
    CN202018077U|2011-03-15|2011-10-26|海尔集团公司|Range hood and gas stove linkage control system and range hood and gas stove linkage control module|
    US9109805B2|2012-01-19|2015-08-18|General Electric Company|Range hood with temperature detection and notification|
    PE20150551A1|2012-06-07|2015-05-06|Halton Group Ltd Oy|FIRE SUPPRESSION SYSTEMS, DEVICES AND METHODS|PE20150551A1|2012-06-07|2015-05-06|Halton Group Ltd Oy|FIRE SUPPRESSION SYSTEMS, DEVICES AND METHODS|
    DE102012213692A1|2012-08-02|2014-02-06|BSH Bosch und Siemens Hausgeräte GmbH|Vapor extraction device and method for controlling a fan motor of a fan and for air cleaning effect determination|
    KR102194782B1|2014-01-24|2020-12-23|삼성전자주식회사|Apparatus and method for aralm service using user status recognition information in electronics device|
    DE102014206664A1|2014-04-07|2015-10-08|BSH Hausgeräte GmbH|Device for detecting a fire hazard and / or a fire|
    US20150302569A1|2014-04-22|2015-10-22|General Electric Company|Sensing system for a cooktop appliance with airflow protected sensor|
    US9418528B2|2014-06-20|2016-08-16|Haier Us Appliance Solutions, Inc.|Oven appliance with cavity fire detection|
    WO2017005531A1|2015-07-06|2017-01-12|Koninklijke Philips N.V.|Air processing system and method|
    WO2017031044A1|2015-08-14|2017-02-23|Tyco Fire Products Lp|Filter clogging monitoring systems and methods|
    JP2017040430A|2015-08-19|2017-02-23|東京瓦斯株式会社|Range hood|
    DE102016104349B3|2016-03-10|2017-03-02|Albert Orglmeister|Method for improving the accuracy of targeted at extinguishing systems controlled by infrared and video early fire detection|
    DE102016207087A1|2016-04-26|2017-10-26|BSH Hausgeräte GmbH|Kitchen appliance with hob and extractor device and method for operating a fume extraction device|
    CN105864861A|2016-06-24|2016-08-17|珠海格力电器股份有限公司|Intelligent range hood|
    CN106422121A|2016-12-15|2017-02-22|四川工业科技学院|Emergent fire extinguishing system of vehicle and vehicle|
    US10695600B2|2016-12-16|2020-06-30|Tyco Fire Products Lp|Monitoring platform for mechanical fire suppression systems|
    US10478651B2|2016-12-16|2019-11-19|Tyco Fire Products Lp|Sensor integration in mechanical fire suppression systems|
    US20200054905A1|2017-03-20|2020-02-20|Oy Halton Group Ltd.|Fire Safety Devices Methods and Systems|
    CN107908144B|2017-11-24|2020-09-18|北京小米移动软件有限公司|Method and device for controlling smoke extractor and storage medium|
    US10810860B1|2018-01-03|2020-10-20|Objectvideo Labs, Llc|Intelligent vent hood|
    CN108711252A|2018-09-06|2018-10-26|青岛海大新星软件咨询有限公司|A kind of home intelligent management system|
    KR102002078B1|2018-11-13|2019-07-24|주식회사 제이텍|A kitchen hood system for controlling air supply and exhaust airflow in accordance with the setting conditions of the air conditioning system and its control method|
    US10634366B1|2018-12-10|2020-04-28|Bsh Home Appliances Corporation|Cooktop ventilation system having a smoke detection and alarm system|
    WO2020245725A1|2019-06-03|2020-12-10|Tyco Fire Products Lp|Systems and methods for electronically controlling discharge nozzles|
    CN112043997B|2020-09-09|2021-12-14|浦江县承玥电子科技有限公司|Barbecue grill rapid fire extinguishing and cooling device for outdoor camping in non-water-source area|
    KR102280130B1|2021-02-10|2021-07-21|주식회사 이노메카닉스|Customized eco-friendly mobile kitchen ventilation system for controlling the air volume at variable speed according to the cooking temperature of kitchen equipment|
    CN113350718A|2021-04-13|2021-09-07|西安石油大学|Remote control ultrasonic wave platform of putting out a fire based on FPGA|
    法律状态:
    2018-12-04| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-03-31| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-08-11| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-12-01| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 07/06/2013, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US201261656941P| true| 2012-06-07|2012-06-07|
    US61/656,941|2012-06-07|
    PCT/US2013/044839|WO2014018168A1|2012-06-07|2013-06-07|Fire suppression systems, devices, and methods|
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