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    • 专利摘要:
    13SummaryA control device (2) adapted to monitor and limit the energy consumption of a refrigerator (4), or other electrical equipment, on a vehicle, where the refrigerator (4) is adapted to be operated with a supply voltage Vs from an energetic I a. The control device (2) includesa calculating unit (6) and a display unit (8), said calculating unit (6) beingadapted to calculate a remaining operating time for the refrigerator, where said remaining operating time is calculated depending on at least current electricity consumption P for the refrigerator (4) and is related to a predetermined amount of available electrical energy Pe to be consumed by the refrigerator (4), and to present this calculated return operating time tr on namndadisplay unit (8).(Figure 1)
    公开号:SE1250246A1
    申请号:SE1250246
    申请日:2012-03-15
    公开日:2013-09-16
    发明作者:Michael Lundin
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    TitleControl deviceFIELD OF THE INVENTIONThe present invention relates to a control device and a method according to the preambles of the independent claims. In particular, the invention relates to a control device used in connection with the energy supply of a refrigerator in a vehicle.
    Background of the inventionThere is electrical equipment (eg refrigerator) in vehicles where it is undesirable that the equipment can be fitted even when the vehicle is parked and the engine switched off. There is then a risk that the vehicle's batteries will be discharged, which may, for example, affect the possibility of starting the vehicle. To prevent this, it is common today to use a time control that switches offthe equipment after a number of hours so as not to empty the batteries. An ordinary secondaryprotection is that the equipment is switched off when the system voltage is below a certain value, but then the battery is often already in such poor condition that the vehicle dna probably will not be able to be started without starting aid.
    Utilizing a timer has the disadvantage that it does not take into account how much energyconsumed by the refrigerator. The consumption of a refrigerator is greatly affected by the ambient temperature, for example it consumes much more electricity if the vehicle is parked in the sun and the temperature is up to 30 ° C compared to a cloudy day and 10 ° C. It is estimated that in one day it can vary between 0.1Ah and 96 Ah if you compare onesituation where it is 5 ° C ambient temperature and the refrigerator only needs to go onresting current against it going at full power all the time.
    Another problem is related to the fact that a refrigerator can draw quite a lot of power and todaysalts a fairly short time limit (for example 23h for a refrigerator because it does not existbattery capacity for full power Over an entire weekend) which can result in food in the refrigeratorrisks being enlarged if the truck has been parked over a weekend.
    Japanese patent application JP200530093 relates to a refrigerator in a vehicle where the refrigerator has a function of preventing the battery in the vehicle from being drained. According to this function, the refrigerator is switched off as the battery risks being discharged. The function takes into account the temperature in the refrigerator and information about the refrigerator has been displayed is presented on onedisplay.
    There are thus a number of disadvantages with the current system where the power to the refrigerator is switched off after a predetermined time or when the refrigerator is switched off when the supply voltage is below a certain value.
    The object of the present invention is to provide a device and a method which obviates these disadvantages.
    Summary of the inventionThe above objects are achieved by the invention defined by the independent claims.
    Preferred embodiments are defined by the dependent claims.
    The present invention relates generally to a control device and a method for an electrical equipment, in particular for a refrigerator, on a vehicle to monitor and limit the energy consumption by calculating the remaining operating time and presenting this information on a display unit which is particularly applicable when the vehicle is stationary. parked with fitted refrigerator. The present invention provides a more reliable control ofpower consumption and informs the user of the estimated remaining operating time when the vehicle is parked with a newly installed refrigerator.
    By applying the present invention there is a possibility that a refrigerator can run for several days (depending on ambient temperature / climate), the user gets an estimate of when the refrigerator will be switched off (and can choose whether he / she should empty the refrigerator if the vehicle is to stand parked longer than what the fridge will go) and you have control over that fridgewill never consume more energy than intended and damned to avoid draining the batteries of energy.
    Brief drawing of the descriptionFigure 1 is a block diagram schematically illustrating the present invention.
    Figure 2 shows examples of images that can be displayed on the display unit when applyingpresent invention.
    Figure 3 shows graphs illustrating embodiments of the present invention.
    Figure 4 shows a river diagram illustrating the present inventionDetailed Description of Preferred Embodiments of the InventionThe present invention will now be described with reference to the accompanying drawingsthe drawings.
    The invention will be described with reference to an exemplary embodimentrefrigeration intended to be arranged in a vehicle. However, the control device is applicable to allelectrical equipment, such as computers, air conditioners, fans, etc. which can be arranged on a vehicle, for example a truck, bus, leisure boat, caravan, motorhome or car, but also for example on a ship.
    With reference to the block diagram in figure 1, a control device 2 adapted tomonitor and limit the energy consumption for refrigeration 4, or other electrical equipment, on a vehicle, or a ship, where the refrigeration 4 is adapted to be operated with a supply voltage Vs from an energy source. The energy source can consist of one or more batteries that emit a supply voltage of, for example, 12, 24 or 48 volts.
    The control device 2 comprises a calculation unit 6 and a display unit 8, where the calculation unit 6 is adapted to calculate a remaining operating time tr for the refrigerator. The remaining operating time is calculated depending on at least the current electrical energy consumption P for the refrigerator 4 and is related to a predetermined amount of available electrical energy Pc toconsumed by the refrigerator 4. The estimated remaining operating time is then presented ondisplay unit 8. The control device can, for example, be realized by a software module which forms part of the vehicle's overall control system. It can too.is realized as a separate unit and then comprises a microprocessor and one or more memory units.
    According to one embodiment, the current electrical energy consumption P is determined by measuringthe power that the refrigerator 4 consumes, for example during a predetermined mdt period. As a result, the current electrical energy consumption P can be determined and since the total available electrical energy Pc is known, the remaining operating time can easily be determined by extrapolation. If the PC is 20 Ah and if the supplied current is 1 A, the remaining operating time will be 20 hours.
    In calculating the remaining operating time, other parameters can also be used. For example, the temperature difference between the temperature in the refrigerator and the ambient temperature in such a way that the larger this difference is, the higher the electricity consumption and the shorter the remaining operating time.
    According to one embodiment, the control device 2 comprises a switch 12 adapted to controlthe connection of the supply voltage Vs to the refrigerator 4 in dependence on a control signal 14.
    If the calculated remaining operating time tr has' Opt out, the calculation unit 6 is adaptedto generate a control signal 14 to the switch 12 for switching off the supply voltage VsThe cooling unit 6 is preferably adapted to compare the current remaining operating time tr with a predetermined time ti and if tr is below the said time ti an alarm signal 10 is generated. The predetermined time tl is selected, for example, to a value of the order of a number of hours, e.g. 2 hours, so that the driver must be alerted in good time to have the opportunity to take appropriate action; for example, starting the vehicle.
    According to a further embodiment, the calculating unit 6 is adapted to supply the level of the supply voltage Vs and if it is below a second voltage level V2 an alarm signal 10 is generated. The alarm signal can be an audio or light signal. The supply voltage from the energy source can, for example, be 26 volts (this level has been denoted in Figure 3 by V1)and the second voltage level V2 can then be set to 23 volts.
    The calculating unit 6 is adapted to supply the level of the supply voltage Vs and if it is below a third voltage level V3 a control signal 14 is generated to the switch 12 tobreak the supply voltage Vs to the refrigerator 4. If the supply voltage is 26 Volts, the third voltage level V3 can be set to 22 Volts. It can also be selected as a predetermined part of the supply voltage Vi.
    According to another embodiment, the storage unit 6 is adapted that, when the predetermined amount of energy Pc has been consumed, during the same consumption cycle, generates a control signal 14 to the switch to break the supply voltage Vs to the refrigerator. The same consumption cycle means, for example, that the vehicle's engine has not been running or no external energy source has been connected to the vehicle's energy source.
    The control device 2 is preferably adapted to activate the calculation of the remaining operating time when one or more activation criteria are met and remain activated as long as at least one criterion is met.
    An activation criterion may include supplying the level of the supply voltage Vs and ifit falls below the first voltage level V1, the function to calculate the remaining operating time is activated. Another activation criterion is that the function is activated when the vehicle's engine is not running, and an additional activation criterion is that the function is activated when the vehicle's energy cold is not charged.
    When the function is activated, preferably the maximum permissible current outlet is limited, for example 2A.
    Figure 2 shows examples of images that are adapted to be displayed on the display unit atapplication of the present invention. The top picture shows the current temperature in the refrigerator together with a palav button, as well as a button for othersworking mode ("mode") for the refrigerator. The bottom picture shows the rest insteadoperating time in hours. For example, the display of the temperature and the remaining operating time are alternated.
    The invention will now be further explained with reference to Figure 3 which shows graphsillustrating various embodiments of the invention.
    The top graph shows how the supply voltage V, others' with time t. The middle graph shows available energy P in Ah and how the other's with time t. And the bottom graph shows the remaining time tr in hours. Note that the graphs are simplified to clearly illustrate the invention. In reality, certain time courses are much faster than inthese illustrations, for example when the supply voltage rises in connection with when the motor is started and the energy source starts to charge.
    Referring to Figure 3, the supply voltage V, across V1 is up to time a. The available energy P is then. PC which is therefore determined in advance with regard toenergy source capacity. The remaining operating time tr is then tc ie. maximum. Afterthe time a the refrigerator consumes energy only from the vehicle's energy cold and the remaining operating time decreases. At time b, the remaining time is shorter than ti and an alarm can be generated if that function is active. At time c, the supply voltage is lower than the third voltage level V3, which meant that the switchbreaks the tight supply to the refrigerator. The value of the remaining operating time is stored. Attime d is the supply voltage across V3 again, for example the motor has been started, and the supply voltage rises rapidly to be higher than Vi at time e. The remaining time tr becomes again tc and remains so until the time f when again the supply voltage falls below VI and the calculation (subtraction) of the remainingoperating time tr paborjas. In this case, it pays until the time g then kerigenthe supply voltage exceeds Vi.
    Some hysteresis may be built into the functionality, which may, for example, mean that the reduction of the remaining operating time at point a is not started immediately but only aftera certain fixed time, for example five minutes. A certain delay may also exist inpoint e when the supply voltage & ter is above VI ddr hysteresis meant that only after a number of minutes does the remaining operating time become tc.
    The present invention also relates to a method for a control device adapted toMonitor and limit clencrgif consumption for ctt refrigerator, or other cick riskequipment, on a vehicle, where the refrigerator is adapted to operate with a supply voltage Vsfrom an energy source, e.g. one or more batteries. Figure 4 shows a flow chart illustrating the method according to one embodiment.
    The method involves:calculate a remaining operating time tr for the refrigerator, the said remaining operating timeis calculated depending on at least the current electrical energy consumption P for the refrigerator and is related to a predetermined amount of available electrical energy Pc to be consumed by the refrigerator, - present this estimated remaining operating time on a display unit. The current electricity consumption P is determined, for example, by during a predetermined meeting periodfeed the power that the refrigerator consumes.
    The control device comprises a switch adapted to control the connection of the supply voltage V, to the refrigerator in dependence on a control signal.
    When the estimated remaining operating time tr has expired, the calculation unit is adapted togenerate a control signal to the switch to break the supply voltage V, to the refrigerator.
    The method comprises, according to one embodiment, comparing the current remaining operating time tr with a predetermined time ti and if tr is less than said time tl an alarm signal is generated. The alarm signal can be an audio or light signal.
    According to one embodiment, the method comprises supplying the level of the supply voltage Vs and if it is below a second voltage level V2 an alarm signal is generated. The calculation unit is further adapted to supply the level of the supply voltage V, and if it is below a third voltage level V3, a control signal is generated to the switch to break the supply voltage V, to the refrigerator.
    According to a further embodiment, the method comprises that when the predetermined amount of energy Pe has been consumed, during the same consumption cycle, the calculation unit is adapted to generate a control signal to said switch to break the supply voltage V, to the refrigerator.
    The control device is adapted to activate the calculation of the remaining operating time when one or more activation criteria are met and remain activated as long as at least one criterionis met. This embodiment is illustrated in the flow chart in Figure 4. An activation criterion may include supplying the level of the supply voltage Vs, and if it is below the first voltage level V1, the function of calculating the remaining operating path is activated. Another activation criterion is that the function is activated when the vehicle's engineis not running, and an additional activation criterion is that the function is activated thenthe vehicle's energy cold is not charged.
    At supply voltages exceeding 26 Volts, according to one application, the refrigerator operates at full power to achieve the highest possible efficiency.
    The present invention is not limited to the above-described preferred embodiments. Various alternatives, modifications and equivalents can be used. The above embodiments are not to be construed as limiting the scope of the invention as defined by the appended claims.
    权利要求:
    Claims (1)
    [1]
    1.
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    同族专利:
    公开号 | 公开日
    SE537188C2|2015-03-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CN107697004A|2016-08-08|2018-02-16|福特全球技术公司|Intelligent cooler based on vehicle|
    法律状态:
    2015-12-01| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1250246A|SE537188C2|2012-03-15|2012-03-15|Control device for electrical equipment in a vehicle|SE1250246A| SE537188C2|2012-03-15|2012-03-15|Control device for electrical equipment in a vehicle|
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