• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
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    • 专利摘要:
    TYPE OF SEPARATE FLOW ROUTE OF AIR-GAS MIXING DEVICE According to the present invention, a gas-air mixing device used in a gas boiler includes: a branching gas supply pipe in a first flow path gas and a second gas flow path; a branching air supply pipe in a first airflow path and a second airflow path via an airflow branching apparatus; a pressure valve that is connected to the inlet side of the gas supply pipe to adjust the rate of gas supply being supplied to the gas supply pipe; and a drive unit in which two valve bodies are connected to a rod that moves vertically up and down due to the magnetic force of an electromagnet; and the airflow path branching apparatus is formed so as to have a slot that connects either to the first air flow path or to the second air flow path, and has a part of (...).
    公开号:BR112013018907B1
    申请号:R112013018907-0
    申请日:2011-12-20
    公开日:2021-01-26
    发明作者:Seung Kil Son
    申请人:Kyungdong Navien Co., Ltd.；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a gas-air gas-air mixing device and, more specifically, to a separate flow type of gas-air mixing device to optimize a maximum and minimum flow rate. TECHNICAL FUNDAMENTALS
    [0002] In general, various types of boilers used for heating have been developed and used according to the required floor space or installation purpose such as an oil boiler, a gas boiler, and an electric boiler according to the fuel supplied.
    [0003] Among these boilers, particularly in the gas boiler, as a general method for combustion of gas fuel, in the case of a pre-mixed burner, the gas fuel is burned by mixing air gas in a mixing ratio of one optimal state of combustion in advance and then supply of the gas mixture (air + gas) to a flame hole surface.
    [0004] In addition, in the gas boiler, a maximum and minimum flow rate (TDR) is established. The maximum and minimum flow rate (TDR) represents a "ratio of a minimum amount of gas consumed to a maximum amount of gas consumed" in a gas combustion device in which the amount of gas is variably controlled. For example, when the maximum amount of gas consumed is 24,000 kcal / h and the minimum amount of gas consumed is 8,000 kcal / h, the maximum and minimum flow rate (TDR) is 3: 1. The maximum and minimum flow rate (TDR) is limited according to how low the minimum amount of gas consumed to maintain a stable flame can be controllably controlled.
    [0005] In the case of the gas boiler, as the maximum and minimum flow rate (TDR) increases, the convenience in heating and using hot water is increased. That is, when a burner operates in a region where the maximum and minimum flow rate (TDR) is low (that is, when the minimum amount of gas consumed is large), and heating and hot water loads are small, the The boiler is often switched on and off and, as a result, a deviation in temperature control is increased and the device's durability deteriorates. Consequently, a method to improve the maximum and minimum flow rate (TDR) of the burner applied to the gas boiler has been suggested.
    [0006] Figure 1 is a graph illustrating a relationship between a quantity of gas consumed and pressure, Figure 2 is a schematic diagram illustrating a combustion device in the related technique, and Figure 3 is a graph illustrating a relationship between an oxygen concentration and a dew point temperature. A problem of the combustion device in the related art will be described with reference to Figures 1 to 3.
    [0007] In a gas-air mixing device using a pneumatic valve, the gas flows into an air supply pipe by differential pressure between the gas pressure of a gas supply pipe and the air pressure of the supply pipe. of the air to become a gas-air mixture.
    [0008] Basic elements that limit a maximum and minimum flow rate (TDR) of the gas burner in the gas-air mixing device using the pneumatic valve can be a relationship between a quantity of gas consumed Q and differential pressure ΔΡ as illustrated in Figure 1 and, generally, the relationship between the differential pressure and the flow rate of a fluid is as follows. Q = k√ △ P
    [0009] That is, the differential pressure needs to be increased four times to increase the fluid flow rate twice. Therefore, a differential pressure ratio needs to be 9: 1 to establish the maximum and minimum flow ratio (TDR) to 3: 1 and a differential pressure ratio needs to be 100: 1 to establish the maximum and minimum flow ratio. 10: 1 TDR, and there is a problem where it is impossible to increase the gas supply pressure indefinitely.
    [0010] However, in the gas-air mixing device using a gas valve of the proportional current control type, the gas flow rate has a ratio that is proportional to the square root of the gas supply pressure P.
    [0011] When Figure 5 is described as an example, the differential pressure ΔΡ represents the differential pressure between the air pressure Pb of an air path b and the gas pressure Pa of a gas path a, Pa - Pb, and it is experimentally known that when a valve on one inlet side of the gas supply pipe is closed, control reliability can be guaranteed only in the case where the gas pressure Pa of the gas supply pipe is at least 0.04903325kPa (5 mmH2O) or more, that is, the pressure of the gas supply pipe is lower than the atmospheric pressure by 0.04903325kPa (5 mmH2O) or more.
    [0012] To solve the problem where it is impossible to increase the gas supply pressure indefinitely, a method has been presented, which increases the maximum and minimum flow rate (TDR) of the gas burner by dividing the burner into several regions as illustrated in Figure 2 and opening and closing a passage of injected gas for each burner.
    [0013] In the combustion device of Figure 2, when a region of a burner 20 is divided into a region of first stage 21 and a region of second stage 22 in a ratio of 4: 6, valves 31 and 32 are mounted in the respective gas passages , and a proportional control valve 33 is installed in a gas supply flow path for flue gas by controlling a gas supply rate in accordance with the ignition capacity of the burner, a proportional control region illustrated in a table below can be obtained. In this case, it is assumed that the maximum and minimum flow ratio (TDR) for each burner region is 3: 1. At that time, a main valve 34 is installed on a gas inlet side of the proportional control valve 33 and the main valve 34 as an on / off valve determines whether to supply gas by opening and closing operation and is usually made up of a drive unit. Table 1
    [0014] That is, when a maximum amount of gas is 100%, as a proportional control from 13% to 100% can be obtained, the maximum and minimum flow rate (TDR) is approximately 7.7: 1. However, when the combustion device having such a structure is applied to a condensing boiler, there is a problem as follows.
    [0015] The condensation boiler uses a method that increases the efficiency of a gas gutter and by condensing steam included in the exhaust gas and collecting the latent heat from the condensed steam through a heat exchanger. Consequently, as the steam is more easily condensed when a dew point temperature of the exhaust gas rises, the efficiency of the boiler is improved.
    [0016] However, the dew point temperature of the exhaust gas increases as the volume ratio (%) of the vapor included in the exhaust gas increases, and the amount of excess air (refers to oxygen and nitrogen that do not participate in a combustion reaction between the constituents of the exhaust gas, H2O + CO2 + O2 + N2) contained in the exhaust gas must be small to increase the volume ratio of the vapor.
    [0017] However, when an oxygen concentration in the exhaust gas increases (that is, it increases the amount of excess air) as shown in Figure 3, the dew point temperature decreases rapidly, and as a result, the efficiency of the condensing boiler deteriorates. .
    [0018] Therefore, when the burner 20 region is divided into first stage 21 region and second stage 22 region as illustrated in Figure 2, air is supplied by a blower 10 to the second stage 22 region of burner 20 even in the case where combustion takes place only in the first stage 21 region, and as a result, the oxygen concentration in the exhaust gas becomes very high.
    [0019] In addition, as the excess air temperature rises to an exhaust gas temperature, some of the heat through combustion of the fuel is used to increase the excess air temperature and, as a result, heat loss occurs.
    [0020] Therefore, when the combustion device shown in Figure 2 is applied to the condensation boiler, there is a problem where it is difficult to anticipate high efficiency in a low-output region (that is, when combustion is carried out only in the first stage region or in the second stage region).
    [0021] However, when the pneumatic gas valve is applied, the ratio between maximum and minimum flow is determined depending on the flow capacity of the blower. However, as most blowers are easily controlled in a region of 1,000 to 5,000 RPM, the maximum to minimum flow ratio, which can be achieved by the blower, is 5: 1. To establish the ratio of maximum to minimum flow at 10: 1 by applying the pneumatic gas valve, the blower needs to operate in the speed range of 1,000 to 10,000 RPM, but the blower is very expensive and it is difficult to find a product marketed for use in the gas boiler.
    [0022] In addition, as illustrated in Figure 4, a type is known that adopts a separating film A configured so that one end of it is formed by a joint and its other end is formed as a free end for the flow path of branched air, such that its other end can rotate around a joint as marked with a dotted line.
    [0023] However, the type mentioned above is configured so that when its other end is comprised in a free fall scheme by means of its own weight, and the negative pressure is applied by the blower, the air flows inward through a difference pressure and thus, the separation film A is lifted by the speed of the air flowing inward, and there is a problem in which, when the amount of air is variable, the separation film vibrates vertically in such a way that an operation is unstable . In addition, when dust, or tinned matter is accumulated in the joint, there is also a problem in which the operation is not smooth. PREVIOUS TECHNIQUE PATENT DOCUMENT
    [0024] (Patent Document 0001) Korean Patent No. 10-0805630 of February 20, 2008 REVELATION TECHNICAL PROBLEM
    [0025] The present invention is designed to provide a gas-air mixing device that is of high thermal efficiency and simple in structure, and resolves the operating instability of the existing separation film type while perfecting a ratio between maximum and minimum flow. TECHNICAL SOLUTION
    [0026] A gas-air mixing device used in a gas boiler according to the present invention includes: a branching gas supply pipe in a first gas flow path and a second gas flow path; a branching air supply pipe in a first airflow path and a second airflow path via an airflow branching apparatus; a pneumatic valve connected to an inlet side of the gas supply pipe to control a rate of gas supply supplied to the gas supply pipe; and a drive unit having two valve bodies connected to a rod that moves vertically upwards and downwards by means of the magnetic force of an electromagnet, in which a gap that is in communication with any airflow path of the first air flow path and the second air path and a connecting part through which the rod can pass in a position corresponding to the slot, are formed in the air flow path branching apparatus.
    [0027] In addition, the airflow path branching apparatus consists of two airflow path guides.
    [0028] In addition, in the gas-air mixing device used in a gas boiler according to the present invention, the two valve bodies can be controlled to close any of the gas flow path of the gas flow path and the slit in a low-output mode in which the amount of gas consumed is small.
    [0029] In addition, in the gas-air mixing device used in a gas boiler according to the present invention, nozzles can be installed respectively in the gas flow paths on one outlet side of the gas supply pipe of the various gas valves. auxiliary gases.
    [0030] In addition, the hole sizes of the nozzles of the gas flow paths may be different from each other.
    [0031] In addition, in the gas-air mixing device used in a gas boiler according to the present invention, a main valve that serves as an opening / closing valve as an on / off valve, can be connected to one side of inlet of the gas supply pipe of the pneumatic valve.
    [0032] In addition, the nozzles of the gas flow paths can be arranged in parallel with each other.
    [0033] In addition, a blower to supply air required for combustion can be connected to an inlet side of the air supply pipe.
    [0034] Another gas-air mixing device in a gas boiler according to the present invention includes: a branched air supply pipe in a first air flow path on an upper side and a second air flow path in one lower side by means of an air flow path branching apparatus; a branching gas supply pipe in a first gas flow path in a second gas flow path; a pneumatic valve connected to an inlet side of the gas supply pipe to control a rate of gas supply supplied to the gas supply pipe; and a drive unit having a valve body connected to a rod that moves vertically up and down by means of the magnetic force of an electromagnet, in which the first gas flow path extends to a limit of the first gas flow path. airflow and the second airflow path.
    [0035] In addition, in another gas-air mixing device used in a gas boiler according to the present invention, the first gas flow path can be connected with two air flow path guides that extend in parallel with the longitudinal direction of the air supply pipe.
    [0036] In addition, in another gas-air mixing device used in a gas boiler according to the present invention, the valve body can be controlled to close the first gas flow path in a low-output mode in which the amount of gas consumed is small. ADVANTAGE EFFECTS
    [0037] According to the present invention, since the rates of air and gas supply at a minimum outlet are approximately ½ of the rates of air and gas supply at a maximum outlet, it is possible to expect an advantageous effect in which an efficient deterioration problem excess air does not occur, unlike the related technique.
    [0038] Additionally, when a current proportional control type of the gas valve is adopted, as a current value to control the opening and closing of the gas valve is changed depending on the speed (RPM) of a blower, a controller for the blower that binds the opening and closing of the gas valve, needs to be provided. In contrast, in a gas-air mixing device adopting a pneumatic valve in accordance with the present invention, as the gas and air are already mixed to become a mixture before flowing into a mixed gas flow path. , such a controller is not required.
    [0039] In addition, according to the present invention, the gas-air mixing device can be configured compactly by reducing the width of the air flow path and the flow noise can be reduced and the flow loss can be minimized by simplification of the flow path. DESCRIPTION OF THE DRAWINGS
    [0040] Figure 1 is a graph illustrating a relationship between the amount of gas consumed and the pressure. Figure 2 is a schematic diagram illustrating a combustion device in the related art. Figure 3 is a graph illustrating a relationship between an oxygen concentration and a dew point temperature. Figure 4 is a diagram schematically illustrating another airflow path branching apparatus in the related art. Figure 5 is a schematic diagram illustrating a configuration in a low-output mode in a combustion device including a separate flow path type of gas-air mixing device according to an exemplary embodiment of the present invention. Figure 6 is a schematic diagram illustrating a configuration in a high outlet mode in the combustion device including the type of separate flow path of the gas-air mixing device according to an exemplary embodiment of the present invention. Figure 7 is a schematic diagram illustrating a combustion device including a type of flow path separate from the gas-air mixing device according to another exemplary embodiment of the present invention. Figure 8 is a graph illustrating a relationship between an outlet and a blower speed in the combustion device including the gas-air mixing device according to the present invention. Figure 9 is another graph illustrating a ratio of an outlet and a blower speed in the combustion device including the gas-air mixing device according to the present invention. BEST MODE
    [0041] In the following, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, similar or similar reference numerals refer to similar or similar elements.
    [0042] An exemplary embodiment of a separate flow path type gas-air mixing device according to an embodiment of the present invention will be described with reference to Figures 5 and 6.
    [0043] In the type of separate flow path of the gas-air mixing device according to the present invention, a gas supply pipe 112 of the combustible gas is branched into a plurality of gas flow paths, for example, two gas flow paths. gas flow 115 and 116, and an air supply pipe 113 is derived in a plurality of air flow paths, for example, two air flow paths 117 and 118.
    [0044] Figure 6 schematically illustrates a case where the type of flow path separated from the gas-air mixing device according to the present invention is in a high output mode. Referring to Figure 6, the air supply pipe 113 is branched into two air flow streams 117 and 118 using, for example, the air flow branching apparatus 170. The flow path branching apparatus air flow 170 may consist, for example, of an airflow path guide in the shape of "L" 171 and an airflow path guide in the shape of "C" 172. A slot 173 is formed between the airflow pathway 171 and airflow pathway 172, and slot 173 serves as an air passage through which air can pass in airflow path 118.
    [0045] In addition, a joining part 174, through which a rod 173 can pass and be attached to it, can be provided in the airflow path guide 172. Additionally, rod 163 can even pass through slot 173. With for this purpose, the slot 173 and the connecting part 174 are preferably formed in positions corresponding to each other.
    [0046] A pneumatic valve 153 to control a gas supply rate according to the burner fire capacity required in a proportional control combustion system is connected to the gas supply pipe 112, and a main valve 154 is connected to a inlet side of the gas supply pipe of the pneumatic valve 153. The main valve 154 as an on / off valve serves to supply gas through opening and closing operations.
    [0047] The air and gas that pass through the air supply pipe 113 and the gas supply pipe 112 are transformed into an air-gas mixture in a mixed gas flow path 111, branched from the air supply pipe. air 113, and then it is supplied to a mixing chamber 120. Additionally, a blower 110 to supply required air in the air supply pipe 113 is connected to a point where the air supply pipe 113 and the flow path join of mixed gas 111. Additionally, as can be seen in Figures 5 and 6, the gas supply pipe 112 is connected to the air supply pipe 113, while in the structure adopting the current proportional control valve as illustrated in Figure 2, the gas supply pipe is connected directly to the mixing chamber 120.
    [0048] Figures 5 and 6 schematically illustrate a drive unit and the drive unit is configured to include a stem 163 that moves vertically up and down through the magnetic force of an electromagnet 165 and two valve bodies 161 and 162 connected to stem 163.
    [0049] As shown in Figure 5, when valve bodies 161 and 162 close slit 173 and gas flow path 116, the air supplied to air flow path 118 of air supply pipe 113 is blocked by the valve body 161 not to be supplied to the mixed gas flow path 111 and the gas from the gas flow path 116 is blocked by the valve body 162 not to be supplied to the mixed gas flow path 111.
    [0050] Consequently, air is supplied via only the air flow path 117 of the air supply pipe 113 and gas is supplied only via the gas flow path 115 of the gas supply pipe 112. That is, in the illustrated configuration in Figure 5, a low output state is obtained in which the gas supply rate is small.
    [0051] However, in Figure 6, as air and gas can be supplied to the mixed gas flow path 111 through slot 173 and gas flow path 116, respectively, air is the gas supplied to the gas flow path. mixed 111 are increased compared to Figure 5. That is, in the configuration illustrated in Figure 6, a high output state is obtained in which the rate of gas supply is large.
    [0052] However, since gas is supplied through two gas flow paths 115 and 116 in Figure 6, the gas supply flow rate is twice as high as when the gas supply is blocked in the gas flow path 116 through the valve body in Figure 5. However, since the differential pressure ΔΡ is effectively decreased due to the velocity Vb at point b of the airflow path 117 in Figure 6, the gas supply flow rate in Figure 6 is not effectively twice as high as the flow rate. gas supply flow in Figure 5.
    [0053] A table below illustrates the changes in the gas supply rate depending on a change in the blower speed in Figure 5 low output mode and Figure 6 high output mode, respectively, based on an experimental result.
    [0054] Here, Qair represents the rate of air supply and Qgas represents the rate of gas supply.
    [0055] With reference to the table above, based on the experimental result, it can be found that the rate of Qgas gas supply in the high outlet mode in which the valve is opened is approximately 1.8 times higher than that in the low outlet mode in which the valve is closed.
    [0056] Therefore, when a blower in which a maximum RPM to minimum RPM ratio is 5: 1 is used, the maximum to minimum flow ratio can be approximately 9: 1. That is, to obtain the maximum to minimum flow ratio of 10: 1, a blower in which the maximum RPM to minimum RPM ratio ranges from approximately 6: 1 to 7: 1 needs to be used.
    [0057] Additionally, optionally, the nozzles 141 and 142 can be installed on the outlet sides of the gas flow paths 115 and 116. In addition, preferably, the nozzles 141 and 142 are installed in parallel on the gas flow paths 115 and 116.
    [0058] The mixing of the mixing chamber 120 is supplied to a burner surface 130.
    [0059] In the combustion device including the separate flow path type of gas-air mixing device according to the present invention, as the gas and air are first mixed in the air supply pipe 113 before entering the mixing chamber 120 to become a mixture, a controller may not be provided, which provides only the amount of air required for combustion by controlling the RPM of the blower 10 depending on an proportional control valve opening and closing 33, unlike the blower device. combustion of the gas boiler of Figure 2, and as a result, the combustion device can be configured simply, and as the rate of air supply may already be decreased in the air supply pipe 113 in low outlet mode, an amount of excess air supplied to the burner is markedly reduced, and as a result, the deterioration of efficiency by excess air is significantly reduced.
    [0060] A burner structure, illustrated in Figures 5 and 6, includes the mixing chamber 120 to show a combustion structure of a pre-mixed burner. The pre-mixed burner pre-mixes the air and gas to allow complete combustion and ejects the mixture onto the surface of the burner 130 to obtain combustion, and as the pre-mixed burner can perform combustion at an excess air ratio of less than a Bunsen burner, a dew point temperature can be increased, and as a result, the pre-mixed burner is widely used particularly in the condensing boiler.
    [0061] Although the nozzles 141 and 142 are exemplarily provided in the gas flow paths 115 and 116, respectively in the embodiment, two or more nozzles can of course be installed in the respective gas flow paths. A nozzle bore size ratio, 141 and 142, can be 5: 5, but nozzle bore sizes 141 and 142 can be different from each other, for example, 4: 6 to further increase the maximum flow rate and minimum (TRD).
    [0062] The mixing chamber 120 as a place where air and gas are mixed is connected to the mixed gas flow path 111, as described above. In addition, an air distribution plate 121 is preferably installed in the mixing chamber 120 to gently mix air and gas by preventing the air and gas from moving directly to the burner surface 130.
    [0063] For the burner surface 130, the existing used burner surface for the premix can be used, for example, a metal, fiber, ceramic or a stainless steel punch plate, or the like.
    [0064] In the following, another embodiment of the present invention will be described with reference to Figure 7.
    [0065] The combustion device of the gas-air mixing device, according to the embodiment illustrated in Figures 5 and 6, has a problem in which the airflow path branching apparatus 170, which is branched into two pathways of air flow 117 and 118, causes the flow of unnatural air, and a ΦD width of the air flow path needs to be increased to reduce the pressure loss caused by the unnatural air flow.
    [0066] The problem can be solved by another modality of the present invention, illustrated in Figure 7, and in a combustion device including the gas-air mixing device according to another modality of the present invention, any one of the gas flow path 215 of two gas flow paths 215 and 216 branched from a gas supply pipe 212 extends into an air supply pipe 213, preferably up to a limit between two air flow paths 217 and 218 of the air supply pipe 213.
    [0067] The opening and closing of the gas flow path 215 is controlled by a drive unit consisting of a rod 263, which moves vertically up and down by the magnetic force of an electromagnet 265, and a valve body 261 connected to the stem 263. The gas flow path 215 is connected to the air flow path guides 271 and 272 which extend horizontally in parallel with the longitudinal direction of the air supply pipe 213 in such a way that the flow path guides airflow 271 and 272, and gas supply pipe 215 is preferably substantially Y-shaped, to branch air supply pipe 213 into two airflow paths 217 and 218. Valve body 261 can seat in the airflow path guides 271 and 272.
    [0068] That is, the two valve bodies 161 and 162 are used to open and close the air flow path 118 and the gas flow path 116, respectively, in the form of Figures 5 and 6, but in the form of Figure 7, as seen in a part marked with a dotted line at 7 (a), when valve body 261 is seated in gas flow path 215, gas flow path 215 and air flow path 218 are simultaneously impeded to switch to low output mode as shown in Figure 5.
    [0069] However, as seen in Figure 7 (b) which is a cross-sectional view cut in a vertical direction to the longitudinal direction of the air supply pipe 213, openings are formed on the left and right sides of the gas supply pipe 215 to allow air to pass through the other airflow path 217.
    [0070] In the gas-air mixing device of the present invention, according to Figure 7, as the unnatural air flow does not occur, it is possible to anticipate an advantageous effect in which the loss of flow deteriorates to reduce the width ΦD of the flow path. air flow.
    [0071] As a pneumatic valve 253, a main valve 254, and nozzles 241 and 242 of Figure 7 correspond to pneumatic valve 153, main valve 154, and nozzles 141 and 142 of Figures 5 and 6, a description thereof will be omitted.
    [0072] In the following, an operation of the present invention by means of the configuration will be described with reference to Figures 8 and 9.
    [0073] When a ratio of a maximum output to a minimum output, that is, a ratio between maximum flow and minimum flow is 5: 1 in C1 in Figure 8 and a pressure differential at the maximum output is 1.96133kPa (200 mmH2O), the pressure differential needs to be 0.0784532kPa (8 mmH2O) (ie 200/52) to obtain an output that is 1/5 of the maximum output, that is, the minimum output. As described above, the output and the flow rate have a relationship to be proportional to the square root of the pressure differential. At that time, a minimum pressure differential needs to be reduced to 0.0196133kPa (2 mmH2O) (ie, 200/102) to increase the ratio between maximum flow and minimum flow to 10: 1 while keeping the maximum output at the same value. However, as described above, as the combustion device must generally be used at a minimum 0.04903325kPa (5 mmH2O) to control the minimum amount of gas, the value may not be practically allowed in a gas boiler combustion control.
    [0074] However, when the type of separate flow path of the gas-air mixing device according to the present invention is adopted, when any one of the gas flow path of the two gas flow path 115 and 116, i.e. , the gas flow path 116 is closed using valve body 162, and simultaneously slot 173 is closed using valve body 161 (C2 of Figure 8), the flow rates of both gas and gas air supplied to the mixing chamber 120 through the mixed gas flow path 111 can be 55% of the flow rate at the maximum outlet. Therefore, a mixing ratio of gas and air is maintained constantly, but the minimum output can become 55% of the maximum output. As a result, the minimum output of approximately 11% of the maximum output can be obtained while maintaining the pressure differential of 0.0784532kPa (8 mmH2O) as at the maximum output. That is, the maximum to minimum flow ratio can be approximately 10: 1 as illustrated in C of Figure 8 using the blower in which the ratio of the maximum RPM to the minimum RPM is 6: 1.
    [0075] As described above, the blower in which the ratio of the maximum RPM to the minimum RPM is approximately 6: 1, and not 5: 1 needs to be used to acquire the maximum to minimum flow ratio of 10: 1 because the loss of differential pressure occurs in the type of separate flow path of the gas-air mixing device according to the present invention due to the influence of the air supply pipe 113 and the boiler structure, and the like.
    [0076] Figure 9 illustrates exemplarily that the output increases in the range of 2.5 kw to 10 kw while being substantially proportional to the speed of the blower in the low outlet mode in which the heating and hot water loads are small (line a in Figure 9 ) and the output increases in the range of 7 kw to 25 kw while being substantially proportional to the blower speed in the high output mode in which the heating and hot water loads are large (line c in Figure 9). In this case, the ratio between maximum and minimum flow is 10: 1 (that is, 25: 2.5). Line b in Figure 9 indicates a case in which the low output mode is switched to high output mode, and line d in Figure 9 indicates a case in which the high output mode is switched to low output mode. .
    [0077] The combustion device including the separate flow path type of gas-air mixing device according to the present invention can, of course, be applied even to a water heater, and the like, in addition to the gas boiler.
    [0078] Although the specific preferred embodiments of the present invention have been illustrated and described as above, the present invention is not limited to the modalities, and various changes and modifications can be made by those skilled in the art within the scope without departing from the spirit of the present invention. In addition, the accompanying drawings are not illustrated according to a scale, but partially enlarged and reduced, to describe the essence of the present invention. DESCRIPTION OF THE MAIN REFERENCE NUMBERS OF THE DRAWINGS 110: Blower 111: Mixed gas flow path 112, 212: Gas supply pipe 113, 213: Air supply pipe 115, 116, 215, 216: Gas flow path 117, 118, 217, 218: Airflow path 120: Mixing chamber 121: Air distribution plate 130: Burner surface 141, 142, 241, 242: Nozzle 161, 162, 261: Valve body 153, 253: Pneumatic valve 154, 254: Main valve 161, 162, 261: Valve body 170: Airflow path branching apparatus 171: L-shaped airflow path guide 172: C-shaped airflow path guide 173: Slit 174: Union part 271, 272: Airflow path guide
    权利要求:
    Claims (10)
    [0001]
    Gas-air mixing device used in a gas boiler, characterized by the fact that it comprises: a gas supply pipe branched in a first gas flow path and a second gas flow path; a branching air supply pipe in a first airflow path and a second airflow path via an airflow branching apparatus; a pneumatic valve connected to an inlet portion of the gas supply pipe to control a rate of gas supply supplied to the gas supply pipe; and a drive unit having two valve bodies connected to a rod that moves vertically up and down using the magnetic force of an electromagnet, wherein the airflow path branch apparatus includes a slot that can be communicated with any of the airflow path of the first airflow path and the second airflow path and a joining part through the which the rod can pass in a position corresponding to the slit, are formed.
    [0002]
    Gas-air mixing device according to claim 1, characterized in that the airflow path branching apparatus comprises two airflow path guides.
    [0003]
    Gas-air mixing device according to claim 1, characterized by the fact that the two valve bodies are controlled to close either the first gas flow path or the second gas flow path and split into one low output mode.
    [0004]
    Gas-air mixing device according to claim 1, characterized in that each of the first and second gas flow paths includes a nozzle installed respectively on an outlet side of the gas supply pipe.
    [0005]
    Gas-air mixing device according to claim 4, characterized in that the hole sizes of the nozzles of the first and second gas flow paths are different from each other.
    [0006]
    Gas-air mixing device according to claim 1, characterized in that it additionally comprises a main valve, which is an on / off valve and operates as an open / close valve, in which the main valve is connected to an inlet portion of the gas supply pipe.
    [0007]
    Gas-air mixing device according to claim 4, characterized in that the nozzles of the first and second gas flow paths are arranged in parallel with each other.
    [0008]
    Gas-air mixing device according to claim 1, characterized in that it additionally comprises a blower to supply air required for combustion, in which the blower is connected to an outlet portion of the air supply pipe.
    [0009]
    Gas and air mixing device used in a gas boiler, characterized by the fact that it comprises: a gas supply pipe, including a first gas flow path and a second gas flow path; an air supply pipe connected to the gas supply pipe and including a first air flow path arranged on the upper side of the air supply pipe and a second air flow path arranged on the lower side of the air supply pipe ; an airflow path branching apparatus for dividing the first airflow path and the second airflow path within the air supply tube; a drive unit arranged inside the air supply tube and with a stem that moves vertically up and down and a valve body connected to the stem, wherein the first gas flow path extends to a limit of the first air flow path and the second air flow path and is connected to the air flow path branch apparatus, and wherein the drive unit is configured so that the first gas flow path and the first air flow path are simultaneously opened or blocked by the valve body according to a movement of the stem.
    [0010]
    Gas-air mixing device according to claim 9, characterized in that the airflow path branching apparatus includes two airflow path guides that extend respectively in the left and right directions along the longitudinal direction of the air supply tube and where the first gas flow path is connected to the two air flow path guides.
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    同族专利:
    公开号 | 公开日
    JP2014502719A|2014-02-03|
    CL2013002124A1|2014-01-17|
    AU2015210482B2|2017-06-01|
    CA2896605C|2017-05-16|
    CN103328889B|2015-05-20|
    CA2824674C|2015-11-24|
    EP2690361B1|2019-05-22|
    CA2824674A1|2012-10-04|
    EP2955437A1|2015-12-16|
    EP2690361A1|2014-01-29|
    EP2690361A4|2014-12-24|
    US9364799B2|2016-06-14|
    JP5597775B2|2014-10-01|
    CA2896605A1|2012-10-04|
    KR101214745B1|2012-12-21|
    US20130294192A1|2013-11-07|
    BR112013018907A2|2016-10-04|
    CN103328889A|2013-09-25|
    WO2012134033A1|2012-10-04|
    AU2011364585B2|2015-08-27|
    AU2015210482A1|2015-09-03|
    KR20120109966A|2012-10-09|
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    法律状态:
    2018-12-18| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-11-05| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-11-24| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-01-26| 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 20/12/2011, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    KR10-2011-0026776|2011-03-25|
    KR20110026776|2011-03-25|
    KR1020110084417A|KR101214745B1|2011-03-25|2011-08-24|Gas-air mixer with branch fluid paths|
    KR10-2011-0084417|2011-08-24|
    PCT/KR2011/009888|WO2012134033A1|2011-03-25|2011-12-20|Separate flow path type of gas-air mixing device|
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