Energy-saving low-temperature operation vehicle-mounted refrigerator coupled with whole vehicle thermal management system

Abstract

The utility model belongs to the technical field of vehicle-mounted refrigerators, and particularly relates to an energy-saving low-temperature operation vehicle-mounted refrigerator coupled with a whole vehicle thermal management system. Comprising a plurality of vehicle-mounted refrigerator refrigeration units connected in parallel, and each vehicle-mounted refrigerator refrigeration unit comprises a refrigerator, a semiconductor refrigerator and a cooling loop evaporator; the cold end of the semiconductor cooler is communicated with an inner container of the refrigerator, and the hot end of the semiconductor cooler is in contact with the cooling loop evaporator and used for reducing the temperature of the hot end of the semiconductor cooler, so that the temperature of the cold end is reduced. Under the condition that the suction pressure of the compressor is not reduced, the temperature is reduced, and the two functions of refrigeration and freezing are achieved. The vehicle-mounted refrigerator and the heat management system provided by the utility model are simple in structure, the vehicle-mounted refrigerator is low in energy consumption, and an ideal freezing temperature can be achieved without an additional compressor in the refrigerator system.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle-mounted refrigerators, and in particular relates to an energy-saving, low-temperature operating vehicle-mounted refrigerator coupled with a whole vehicle thermal management system. Background Art

[0002] With the widespread use of new energy vehicles and rising user expectations, car refrigerators are becoming a key consideration when choosing a new energy vehicle. Most traditional car refrigerators use compression refrigeration to reduce temperatures. For example, patent CN118636766A discloses a water-cooled car refrigerator that recycles heat from the refrigerator through a circulating flow, which is then cooled by the air conditioner, improving the condenser's heat dissipation efficiency and thus the cooling effect. However, the car refrigerator system used in this patent requires an additional compressor, which increases the weight and size of the car refrigerator, reducing the available space in the vehicle.

[0003] In recent years, systems that couple vehicle refrigerators to the thermal management of the entire vehicle have emerged, such as the vehicle thermal management system disclosed in patent CN118636767A, which connects the refrigerator evaporator and the air-conditioning evaporator in parallel and directly connects both to the compressor. At the same time, technologies for achieving rapid cooling of vehicle refrigerators have also emerged. Patent CN118269588A uses semiconductor refrigeration sheets and evaporators to achieve local rapid cooling. The object directly contacts the semiconductor cold surface, and the hot surface dissipates heat through the bonding cold storage module. However, the vehicle refrigerator evaporator of these patents is directly connected to the compressor, and the refrigerator circuit evaporator temperature is equal to the air-conditioning evaporator evaporation temperature and the battery cooling circuit temperature. As a result, the evaporation temperature of the vehicle refrigerator evaporator cannot be lower than the air-conditioning evaporator evaporation temperature. To achieve low-temperature operation, the compressor pressure needs to be reduced, but this will increase energy consumption.

[0004] Recently, technologies have emerged that utilize semiconductors as cooling elements in car refrigerators. For example, patent CN117128686A describes a water-cooled car refrigerator based on a car air conditioner. This system exchanges heat between the air conditioner evaporator circuit and the battery cooling circuit with a heat exchange tank, which then exchanges heat with the semiconductor hot end, thereby lowering the semiconductor hot end temperature and achieving better cooling. However, this patent's use of a heat exchange tank increases heat loss by increasing the number of heat exchange paths. Utility Model Content

[0005] The purpose of the utility model is to provide an energy-saving low-temperature vehicle refrigerator coupled with the thermal management system of the entire vehicle, which can reduce the refrigerator temperature to below zero while saving energy through a semiconductor refrigerator.

[0006] To achieve the above-mentioned purpose, the utility model provides an energy-saving, low-temperature operating vehicle refrigerator coupled to the thermal management system of the entire vehicle, including several parallel-connected vehicle refrigerator refrigeration units, each of which includes a refrigerator, a semiconductor refrigerator and a cooling circuit evaporator; the cold end of the semiconductor refrigerator is connected to the inner tank of the refrigerator, and the hot end of the semiconductor refrigerator is in contact with the cooling circuit evaporator, which is used to reduce the temperature of the hot end of the semiconductor refrigerator and thereby reduce the temperature of the cold end.

[0007] Furthermore, the vehicle refrigerator refrigeration unit is also connected in parallel with the vehicle interior air conditioning evaporator and the battery cooling circuit evaporator.

[0008] Furthermore, the cooling circuit evaporator, the vehicle interior air conditioning evaporator and the battery cooling circuit evaporator are also connected in series with the compressor refrigeration system through refrigerant pipelines.

[0009] Furthermore, the compressor refrigeration system includes a compressor, a condenser and a gas-liquid separator; the outlets of the cooling circuit evaporator, the interior air conditioning evaporator and the battery cooling circuit evaporator are connected to the inlet of the compressor after passing through the gas-liquid separator; the outlet of the compressor is connected to the inlet of the cooling circuit evaporator, the interior air conditioning evaporator and the battery cooling circuit evaporator after passing through the condenser.

[0010] Furthermore, the air outlet of the compressor is also connected to the cold end of the semiconductor refrigerator, and the positive and negative poles of the power supply are switched to make the contact end of the semiconductor refrigerator and the inner tank of the refrigerator become the hot end, which is used to transfer the heat of the air outlet of the compressor to the cold end of the semiconductor refrigerator to increase the temperature of the cold end, and then increase the temperature of the hot end, thereby achieving high-temperature heating and disinfection of the refrigerator.

[0011] Furthermore, a throttle valve is provided between the condenser and the cooling circuit evaporator, the vehicle interior air conditioning evaporator and the battery cooling circuit evaporator for regulating the refrigerant flow.

[0012] Furthermore, the cold end of the semiconductor refrigerator is in contact with the inner container of the refrigerator through a heat-conducting component.

[0013] Furthermore, the inner liner of the refrigerator includes a freezer inner liner and a refrigerator inner liner, the cold end of the semiconductor refrigerator contacts the freezer inner liner through a heat conducting component, and the refrigerator inner liner directly contacts the cooling circuit evaporator through a heat conducting component.

[0014] Furthermore, the plurality of vehicle-mounted refrigerator refrigeration units connected in parallel include a trunk vehicle-mounted refrigerator refrigeration unit, a vehicle interior refrigerator refrigeration unit and a front trunk vehicle-mounted refrigerator refrigeration unit.

[0015] Furthermore, the cooling circuit evaporator is also connected to a refrigerant heat exchange pipe, which is used to exchange heat with the hot end of the semiconductor refrigerator when the compressor stops working, thereby reducing the temperature of the semiconductor hot end and maintaining the working state of the vehicle refrigerator.

[0016] In general, the above technical solutions conceived by the present invention have the following technical advantages compared with the existing technology:

[0017] 1. The energy-saving, low-temperature-operating vehicle refrigerator provided by this utility model is coupled to the vehicle's thermal management system and has a simple structure. Heat generated by the hot end of the semiconductor cooler is directly removed by the evaporator, lowering the temperature of the semiconductor cooler's hot end. Since the operating temperature difference of the semiconductor cooler is fixed, the cooling effect of the cold end is enhanced when the hot end temperature is lowered, expanding the refrigerator's cooling range and enabling the refrigerator's freezing function. This utility model reduces the refrigerator temperature to sub-zero while saving energy. The device is low-cost, has high economic value, and has broad application prospects.

[0018] 2. The utility model realizes the freezing function of the vehicle refrigerator through the semiconductor refrigerator and realizes the refrigeration function of the vehicle refrigerator through the compressor refrigeration, which has more comprehensive functions and more flexible control.

[0019] 3. The vehicle refrigerator is coupled to the vehicle's thermal management system. Multiple refrigerator cooling circuit evaporators are connected in parallel to the air conditioning circuit evaporator and the battery cooling circuit evaporator. The evaporation temperature of the refrigerator cooling circuit evaporator is equal to that of the air conditioning evaporator. The vehicle refrigerator can be disinfected simply by exchanging the hot and cold ends of the semiconductor cooler. The refrigerant also allows the vehicle refrigerator to continue operating even when the compressor is stopped. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of an energy-saving, low-temperature operating vehicle refrigerator coupled to a vehicle thermal management system provided by an embodiment of the present utility model;

[0021] Figure 2 This is a structural diagram of a vehicle refrigerator with a freezing function provided by an embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the refrigeration temperature of a car refrigerator at different ambient temperatures provided by an embodiment of the utility model;

[0023] Figure 4 This is a structural diagram of the position of a vehicle refrigerator provided by an embodiment of the utility model;

[0024] Figure 5 This is a structural diagram of a device for realizing high-temperature heating and disinfection function of a vehicle refrigerator provided by an embodiment of the utility model;

[0025] Figure 6 This is a schematic structural diagram of a device for simultaneously realizing the freezing and refrigerating functions of a vehicle refrigerator provided by an embodiment of the utility model;

[0026] Figure 7 The present invention is a schematic diagram of a device structure for realizing parking and endurance of a refrigerator provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the following embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0028] See also Figure 1-7 This utility model provides an energy-saving, low-temperature vehicle refrigerator coupled to a vehicle thermal management system, suitable for use in new energy vehicles or mobile camping. It primarily comprises several parallel-connected vehicle refrigerator refrigeration units, each of which includes a refrigerator, a semiconductor cooler, and a cooling circuit evaporator. The cold end of the semiconductor cooler communicates with the refrigerator's inner container, providing cooling. The hot end of the semiconductor cooler contacts the cooling circuit evaporator, lowering the temperature of the hot end and, in turn, the cold end, thereby improving the cooling effect.

[0029] The vehicle refrigerator refrigeration unit is also connected in parallel with the vehicle interior air conditioning evaporator and the battery cooling circuit evaporator. By directly connecting the refrigerator cooling circuit evaporator in parallel with the air conditioning circuit evaporator, the evaporation temperature of the refrigerator circuit evaporator is kept equal to the evaporation temperature of the air conditioning evaporator. Figure 6 As shown, the refrigerator circuit evaporator absorbs the heat of the refrigerator inner tank through semiconductors and heat-conducting components that are equivalent to heat transfer components, thereby realizing the refrigeration function of the refrigerator.

[0030] The cooling circuit evaporator, the interior air conditioning evaporator, and the battery cooling circuit evaporator are also connected in series with the compressor refrigeration system via refrigerant piping. The compressor refrigeration system comprises a compressor, a condenser, and a gas-liquid separator. The outlets of the cooling circuit evaporator, the interior air conditioning evaporator, and the battery cooling circuit evaporator are connected to the compressor inlet after passing through the gas-liquid separator. The compressor outlets are connected to the inlets of the cooling circuit evaporator, the interior air conditioning evaporator, and the battery cooling circuit evaporator after passing through the condenser. Throttle valves are installed between the condenser and each of these evaporators to regulate the refrigerant flow. Multiple refrigerator cooling circuit evaporators are connected in parallel with the battery cooling circuit evaporator and the interior air conditioning evaporator. Refrigerant enters the compressor for compression and then enters the condenser for condensation. The condensed liquid refrigerant enters the evaporator in three separate paths: one path for the battery cooling circuit evaporator to cool the battery pack, one path for the interior air conditioning evaporator for evaporative cooling, and one path for the vehicle refrigerator system for cooling. The evaporator outlet is directly connected to the compressor inlet. The evaporation temperature of the refrigerator cooling circuit evaporator is equal to the evaporation temperature of the air conditioner evaporator. The refrigeration temperature of the refrigerator is reduced through semiconductor coupling.

[0031] In particular, the cold end of the semiconductor refrigerator is in contact with the inner container of the refrigerator through a heat conducting component. Figure 6 As shown, the refrigerator's interior includes a freezer liner and a refrigerator liner. The cold end of the semiconductor cooler contacts the freezer liner via a heat-conducting component, while the refrigerator liner directly contacts the cooling circuit evaporator via a heat-conducting component. With this configuration, the car refrigerator's refrigeration system consists of two components: semiconductor refrigeration and compressor refrigeration. Semiconductor refrigeration provides the car refrigerator's freezing function, while compressor refrigeration provides the refrigerator's cooling function. By combining these two cooling methods, the car refrigerator can simultaneously achieve both cooling and freezing functions.

[0032] The hot end of the semiconductor cooler directly contacts the refrigerator's cooling circuit evaporator, while the cold end contacts a heat-conducting component, which is connected to the refrigerator's inner container. Refrigerant enters the liquid inlet and evaporates. The evaporation temperature of the refrigerator's cooling circuit evaporator is equal to that of the air conditioner's evaporator. Heat generated by the semiconductor cooler's hot end is directly removed by the evaporator, lowering the temperature of the semiconductor cooler's hot end. Because the operating temperature difference of the semiconductor cooler is fixed, the cooling effect of the cold end is enhanced when the hot end temperature is lowered, expanding the refrigerator's cooling range and enabling the refrigerator's freezing function.

[0033] Specifically, the plurality of vehicle-mounted refrigerator refrigeration units connected in parallel include a trunk vehicle-mounted refrigerator refrigeration unit, a vehicle interior refrigerator refrigeration unit and a front trunk vehicle-mounted refrigerator refrigeration unit.

[0034] In particular, if Figure 7 As shown, the outside of the cooling circuit evaporator is also connected to a refrigerant heat exchange pipe, which is used to exchange heat with the cooling circuit evaporator when the compressor stops working. The temperature of the hot end of the semiconductor refrigerator is reduced by circulating the refrigerant, the working state of the vehicle refrigerator is maintained, the parking endurance of the refrigerator is achieved, and the start-stop time interval of the compressor is extended.

[0035] In particular, if Figure 5 As shown, the compressor's air outlet is also connected to the cold end of the semiconductor cooler. By switching the positive and negative poles of the semiconductor input power supply, the hot and cold ends of the semiconductor cooler are swapped. By switching the pipeline, the compressor air outlet is connected to the refrigerator's cooling circuit, transferring heat from the compressor outlet to the semiconductor cold end, increasing the heat of the semiconductor cooler's cold end. The semiconductor cooler then transfers the heat to the hot end, raising the temperature of the hot end. The heat is then transferred to the vehicle refrigerator through the heat conduction component, raising the temperature of the vehicle refrigerator's inner tank, enabling high-temperature heating and disinfection.

[0036] The present invention will be described in more detail below with reference to specific embodiments:

[0037] Example 1

[0038] The utility model provides an energy-saving low-temperature vehicle refrigerator coupled with the vehicle thermal management system. Figure 4 As shown in the figure, car refrigerators are usually placed in the front trunk, inside the car, and in the trunk area. Figure 6 As shown, the vehicle refrigerator includes a semiconductor refrigerator, a throttle valve, a heat-conducting component, a refrigerator freezer liner, a refrigerator refrigerator liner, and a refrigerator circuit evaporator.

[0039] like Figure 2 As shown, the hot end of the semiconductor cooler directly contacts the refrigerator circuit evaporator, and the cold end contacts the heat-conducting component, which is connected to the refrigerator liner. Figure 3 As shown, the working temperature difference of the semiconductor refrigerator is △T1, and there is a hot end heat transfer temperature difference △T2 and a cold end heat transfer temperature difference △T3. When the hot end temperature of the refrigerator is the ambient temperature outside the car, the cooling temperature of the car refrigerator is T5. When the hot end temperature of the refrigerator is the ambient temperature inside the car, the cooling temperature of the car refrigerator is T4. When the hot end temperature of the refrigerator is the refrigerant temperature of the battery cooling circuit, the cooling temperature of the car refrigerator at this time is T3. When the hot end temperature of the refrigerator is the evaporation temperature of the battery cooling circuit evaporator, the cooling temperature of the car refrigerator is T2. When the hot end temperature of the refrigerator is the car air-conditioning evaporator, the cooling temperature of the car refrigerator is T1. As Figure 2As shown, the refrigerant enters the liquid inlet for evaporation, and the evaporation temperature of the refrigerator cooling circuit evaporator is equal to the evaporation temperature of the air conditioner evaporator. The heat generated by the hot end of the semiconductor refrigerator is directly taken away by the evaporator, which reduces the hot end temperature of the semiconductor refrigerator. Since the working temperature difference of the semiconductor refrigeration is fixed, when the hot end temperature is reduced, the refrigerator refrigeration temperature is reduced to T1, and the freezing function of the refrigerator can be realized.

[0040] like Figure 6 As shown, the outlet of the refrigerator circuit evaporator is connected to the air inlet of the compressor, and the refrigerator circuit evaporator is directly connected in parallel with the air-conditioning circuit evaporator to keep the evaporation temperature of the refrigerator circuit evaporator equal to the evaporation temperature of the air-conditioning circuit evaporator. The refrigerator circuit evaporator is used for direct evaporation cooling, and the heat-conducting component absorbs the heat of the refrigerator liner to achieve the refrigerator refrigeration function.

[0041] Example 2

[0042] The utility model provides a coupling structure between a thermal management system and a vehicle refrigerator, such as Figure 1 As shown, the thermal management system includes a battery cooling circuit evaporator, an in-vehicle air conditioning evaporator, a compressor, a condenser, a throttle valve, and multiple refrigerator cooling circuit evaporators. These multiple refrigerator cooling circuit evaporators are connected in parallel with the battery cooling circuit evaporator and the in-vehicle air conditioning evaporator. Refrigerant enters the compressor for compression before entering the condenser for condensation. The condensed liquid refrigerant enters the evaporator in three separate paths: one path for the battery cooling circuit evaporator to cool the battery pack, one path for the in-vehicle air conditioning evaporator for evaporative cooling, and one path for the onboard refrigerator system for cooling. The evaporator outlet is directly connected to the compressor inlet, and the evaporation temperature of the refrigerator cooling circuit evaporator is equal to that of the air conditioning evaporator. Semiconductor coupling lowers the refrigerator temperature.

[0043] Example 3

[0044] The utility model provides an energy-saving operation structure for maintaining the endurance of the vehicle refrigerator when the compressor stops. Figure 7 As shown, a refrigerant heat exchange pipe is provided outside the refrigerator circuit evaporator to exchange heat with the evaporator. When the compressor stops working, the refrigerant circulates in the refrigerator circuit, exchanging heat with the semiconductor hot end, cooling the semiconductor hot end through the refrigerant, and maintaining the working state of the vehicle refrigerator.

[0045] Example 4

[0046] The utility model provides a vehicle refrigerator disinfection structure, such as Figure 5As shown, by switching the positive and negative poles of the semiconductor input power supply, the hot and cold ends of the semiconductor cooler are swapped. By switching the pipeline, the compressor outlet is connected to the refrigerator cooling circuit, transferring the heat from the compressor outlet to the semiconductor cold end. At this time, the cold end of the semiconductor cooler exchanges heat with the evaporator of the refrigerator cooling circuit, transferring the heat from the cold end to the hot end. The temperature of the hot end rises, and the hot end directly contacts the heat-conducting component. The heat is transferred to the car refrigerator through the heat-conducting component. At this time, the temperature of the car refrigerator liner rises, which can achieve high-temperature heating and disinfection.

[0047] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. An energy-saving, low-temperature-operating vehicle refrigerator coupled with a vehicle thermal management system, characterized in that: It includes several parallel-connected vehicle refrigerator refrigeration units, each of which includes a refrigerator, a semiconductor refrigerator and a cooling circuit evaporator; the cold end of the semiconductor refrigerator is connected to the inner tank of the refrigerator, and the hot end of the semiconductor refrigerator is in contact with the cooling circuit evaporator, which is used to reduce the temperature of the hot end of the semiconductor refrigerator and thus reduce the temperature of the cold end.

2. The energy-saving low-temperature operation vehicle refrigerator according to claim 1, characterized in that: The vehicle refrigerator refrigeration unit is also connected in parallel with the vehicle interior air conditioning evaporator and the battery cooling circuit evaporator.

3. The energy-saving low-temperature operation vehicle refrigerator according to claim 2, characterized in that: The cooling circuit evaporator, the vehicle interior air conditioning evaporator and the battery cooling circuit evaporator are also connected in series with the compressor refrigeration system through refrigerant pipelines.

4. The energy-saving low-temperature operation vehicle refrigerator according to claim 3, characterized in that: The compressor refrigeration system includes a compressor, a condenser and a gas-liquid separator; the outlets of the cooling circuit evaporator, the interior air conditioning evaporator and the battery cooling circuit evaporator are connected to the inlet of the compressor after passing through the gas-liquid separator; the outlet of the compressor is connected to the inlet of the cooling circuit evaporator, the interior air conditioning evaporator and the battery cooling circuit evaporator after passing through the condenser.

5. The energy-saving low-temperature operation vehicle refrigerator according to claim 4, characterized in that: The air outlet of the compressor is also connected to the cold end of the semiconductor refrigerator. By switching the positive and negative poles of the power supply, the contact end between the semiconductor refrigerator and the inner tank of the refrigerator becomes the hot end, which is used to transfer the heat from the air outlet of the compressor to the cold end of the semiconductor refrigerator to increase the temperature of the cold end, and then increase the temperature of the hot end, thereby achieving high-temperature heating and disinfection of the refrigerator.

6. The energy-saving low-temperature operation vehicle refrigerator according to claim 4 or 5, characterized in that: A throttle valve is provided between the condenser and the cooling circuit evaporator, the vehicle interior air conditioning evaporator and the battery cooling circuit evaporator for regulating the refrigerant flow.

7. The energy-saving low-temperature operation vehicle refrigerator according to claim 1, characterized in that: The cold end of the semiconductor refrigerator is in contact with the inner container of the refrigerator through a heat-conducting component.

8. The energy-saving low-temperature operation vehicle refrigerator according to claim 7, characterized in that: The inner liner of the refrigerator includes a freezer inner liner and a refrigerator inner liner. The cold end of the semiconductor refrigerator contacts the freezer inner liner through a heat conducting component, and the refrigerator inner liner directly contacts the cooling circuit evaporator through a heat conducting component.

9. The energy-saving low-temperature operation vehicle refrigerator according to claim 1, characterized in that: The plurality of vehicle-mounted refrigerator refrigeration units connected in parallel include a trunk vehicle-mounted refrigerator refrigeration unit, a vehicle interior refrigerator refrigeration unit and a front trunk vehicle-mounted refrigerator refrigeration unit.

10. The energy-saving low-temperature operation vehicle refrigerator according to any one of claims 1 to 5, characterized in that: The cooling circuit evaporator is also connected to a refrigerant heat exchange pipeline, which is used to exchange heat with the hot end of the semiconductor refrigerator when the compressor stops working, thereby reducing the temperature of the semiconductor hot end and maintaining the working state of the vehicle refrigerator.

Images