Vehicle-mounted common compressor refrigerating system

Abstract

The invention relates to a vehicle-mounted common compressor refrigerating system which comprises a compressor, a condenser, a battery cooling loop evaporator, a compartment air conditioner evaporator, a refrigerator cooling loop evaporator and a semiconductor refrigerator. The heat dissipation end of the semiconductor cooler is tightly attached to the refrigerator cooling loop evaporator. After the battery cooling loop evaporator, the compartment air conditioner evaporator and the refrigerator cooling loop evaporator are connected in parallel, one end is communicated with a compressor air outlet through a condenser, and the other end is communicated with a compressor air inlet through a gas-liquid separator. By means of an existing air conditioner compressor, the battery cooling loop evaporator, the compartment air conditioner evaporator and the refrigerator cooling loop evaporator are connected in parallel, the semiconductor cooler is arranged between the vehicle-mounted refrigerator and the refrigerator cooling loop evaporator, and the refrigerating capacity is fully utilized.

Description

Technical Field

[0001] The invention relates to an automobile refrigeration system, in particular to an on-vehicle shared compressor refrigeration system. Background Art

[0002] With the popularization of automobile electrification, there is an increasing demand for refrigeration systems for the entire vehicle. For example, on-board air conditioning, battery thermal management, and on-board refrigerators all use their own independent refrigeration systems, which cool each part individually through independent compressors or semiconductor refrigerators.

[0003] Semiconductor refrigeration: uses the heat transfer of PN junction to form a temperature difference, thereby cooling and heating; the advantages are that it can both cool and heat, is environmentally friendly, pollution-free, small in size, low in cost, has low vibration and noise during operation, and has a long life; the disadvantage is that the refrigeration efficiency is not high, and generally can only achieve refrigeration 17 to 25°C below the ambient temperature, and the refrigeration capacity is small.

[0004] Compressor refrigeration: Compressor products are traditional mechanical refrigeration technology. The refrigeration temperature of refrigerators is generally -18℃~10℃ (cooling capacity ≤100W), and the refrigeration temperature of air conditioners is generally 16℃~30℃ (cooling capacity ≥4000W); the refrigeration efficiency is high and the refrigeration capacity is large.

[0005] The existing vehicle refrigeration system uses a compressor for each of the vehicle air conditioner, battery thermal management and vehicle refrigerator, resulting in low vehicle refrigeration utilization and waste of components in each system. Therefore, a common solution for integrating the refrigeration systems of vehicle air conditioners, battery thermal management and vehicle refrigerators is needed, such as a common compressor and evaporator parallel refrigeration solution.

[0006] The shared compressor solution uses an air-conditioning compressor with a large cooling capacity as the power source, providing cooling sources for the vehicle air-conditioning, battery thermal management, and vehicle refrigerator respectively, which can realize the integration of system components and improve the refrigeration utilization rate of the whole vehicle; but its disadvantages are: 1. It is connected in parallel with the vehicle air-conditioning evaporator, the cooling temperature is high, and the expected limit temperature of the refrigerator is >6°C; 2. It affects the thermal management system of the whole vehicle and is not energy-saving; 3. It is wasteful to operate a single vehicle refrigerator and the compressor needs to be started; 4. Dual temperature, low-temperature freezing and other functions cannot be realized. Summary of the invention

[0007] In order to solve the above problems, the present invention provides a vehicle-mounted shared compressor refrigeration system, which shares a compressor and can fully utilize energy.

[0008] The technical solution adopted by the present invention is: a vehicle-mounted shared compressor refrigeration system, characterized in that it includes a compressor, a condenser, a battery cooling circuit evaporator, a vehicle interior air conditioning evaporator, a refrigerator cooling circuit evaporator and a semiconductor refrigerator, the cooling end of the semiconductor refrigerator is connected to the refrigerator inner tank, and the heat dissipation end of the semiconductor refrigerator is in close contact with the refrigerator cooling circuit evaporator; after the battery cooling circuit evaporator, the vehicle interior air conditioning evaporator and the refrigerator cooling circuit evaporator are connected in parallel, one end is connected to the compressor outlet through the condenser, and the other end is connected to the compressor inlet through the gas-liquid separator.

[0009] Preferably, the refrigerator cooling circuit evaporator includes a front trunk refrigerator cooling circuit evaporator, an interior refrigerator cooling circuit evaporator and a trunk refrigerator cooling circuit evaporator.

[0010] Preferably, a semiconductor refrigerator is provided between the front trunk refrigerator cooling circuit evaporator and the front trunk refrigerator, the cooling end of the semiconductor refrigerator is connected to the front trunk refrigerator inner tank, and the heat dissipation end of the semiconductor refrigerator is in close contact with the front trunk refrigerator cooling circuit evaporator.

[0011] Preferably, a semiconductor refrigerator is provided between the evaporator of the indoor refrigerator cooling circuit and the indoor refrigerator, the cooling end of the semiconductor refrigerator is connected to the inner tank of the indoor refrigerator, and the heat dissipation end of the semiconductor refrigerator is in close contact with the evaporator of the indoor refrigerator cooling circuit.

[0012] Preferably, a semiconductor refrigerator is provided between the trunk refrigerator cooling circuit evaporator and the trunk refrigerator, the cooling end of the semiconductor refrigerator is connected to the trunk refrigerator inner tank, and the heat dissipation end of the semiconductor refrigerator is in close contact with the trunk refrigerator cooling circuit evaporator.

[0013] Preferably, two semiconductor refrigerators are provided between the front trunk refrigerator cooling circuit evaporator, the interior refrigerator cooling circuit evaporator and the trunk refrigerator cooling circuit evaporator and the corresponding refrigerators.

[0014] Preferably, the semiconductor refrigerator adopts the new Saier 12705 semiconductor refrigerator.

[0015] Preferably, the cooling end of the semiconductor refrigerator is buried in the corresponding refrigerator insulation layer, and the refrigerator cooling circuit evaporator corresponding to the semiconductor refrigerator is arranged outside the refrigerator insulation layer; a fin-type heat conduction is arranged on the inner side of the cooling end of the semiconductor refrigerator to conduct heat to the refrigerator compartment to achieve refrigeration; the semiconductor refrigerator is in close contact with the corresponding refrigerator cooling circuit evaporator.

[0016] Preferably, the semiconductor refrigerator and the corresponding refrigerator cooling circuit evaporator are both buried in the corresponding refrigerator insulation layer, the semiconductor refrigerator is in close contact with the corresponding refrigerator cooling circuit evaporator, and a fin-type heat transfer is arranged on the inner side of the cooling end of the semiconductor refrigerator to conduct heat to the refrigerator compartment to achieve refrigeration.

[0017] The beneficial effects achieved by the present invention are as follows: the present invention uses the existing air-conditioning compressor, connects the battery cooling circuit evaporator, the vehicle interior air-conditioning evaporator and the refrigerator cooling circuit evaporator in parallel, and arranges a semiconductor refrigerator between the vehicle refrigerator and the refrigerator cooling circuit evaporator to fully utilize the refrigeration capacity; the present invention has the following advantages:

[0018] 1. Share air-conditioning compressors to reduce the number of compressors. Add semiconductor refrigerators to the refrigerators to increase the refrigeration capacity of semiconductor refrigerators through refrigerator cooling circuit evaporators to make up for the lack of refrigeration capacity of semiconductor refrigerators.

[0019] 2. By combining the refrigerator cooling circuit evaporator with the semiconductor refrigerator, the lowest refrigeration temperature of the vehicle refrigerator can reach -18℃;

[0020] 3. The battery cooling circuit evaporator, the cabin air conditioning evaporator and the refrigerator cooling circuit evaporator are arranged in parallel, which can realize the full application of energy and have independent energy distribution;

[0021] 4. The cooling end of the semiconductor refrigerator is connected to the inner tank of the refrigerator, and the heat dissipation end of the semiconductor refrigerator is in close contact with the refrigerator cooling circuit evaporator. The heat of the heat dissipation end of the semiconductor refrigerator is quickly taken out through the refrigerator cooling circuit evaporator, which can realize dual temperature and low temperature freezing functions;

[0022] 5. When the compressor is not started, the semiconductor refrigerator can cool alone. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 It is a fully-inclusive refrigerator structure;

[0025] Figure 3 It is a semi-enclosed refrigerator structure;

[0026] Figure 4-6 This is the simulation result diagram of thermal performance of 12705 semiconductor refrigerator;

[0027] Among them: 1. Compressor; 2. Condenser; 3. Battery cooling circuit evaporator; 4. Car air conditioning evaporator; 5. Front trunk refrigerator cooling circuit evaporator; 6. Front trunk refrigerator; 7. Car interior refrigerator cooling circuit evaporator; 8. Car interior refrigerator; 9. Trunk refrigerator cooling circuit evaporator; 10. Trunk refrigerator; 11. Semiconductor refrigerator; 12. Gas-liquid separator; 13. Evaporation tube; 14. Insulation layer. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] like Figure 1-3 As shown, a vehicle-mounted shared compressor refrigeration system of the present invention includes a compressor 1, a condenser 2, a battery cooling circuit evaporator 3, a cabin air-conditioning evaporator 4, a refrigerator cooling circuit evaporator and a semiconductor refrigerator 11. The cooling end of the semiconductor refrigerator 11 is connected to the refrigerator liner, and the heat dissipation end of the semiconductor refrigerator 11 is in close contact with the refrigerator cooling circuit evaporator; the heat of the heat dissipation end of the semiconductor refrigerator 11 is quickly taken out by the refrigerator cooling circuit evaporator on the refrigeration circuit, and the cooling end of the semiconductor refrigerator 11 is connected to the refrigerator liner, thereby realizing refrigeration. Due to the rapid transfer of heat, faster heat exchange can be achieved to achieve low-temperature refrigeration; at the same time, multiple semiconductor refrigerators 11 can be arranged between the refrigerator liner and the refrigerator cooling circuit evaporator, and the refrigeration temperature of different boxes can be distinguished to achieve dual temperature control (freezing and refrigeration function).

[0030] In this embodiment, after the battery cooling circuit evaporator 3, the cabin air conditioning evaporator 4 and the refrigerator cooling circuit evaporator are connected in parallel, one end is connected to the air outlet of the compressor 1 through the condenser 2, and the other end is connected to the air inlet of the compressor 1 through the gas-liquid separator 12, so that multiple components can share one compressor 1 for cooling, and each refrigeration branch can be cooled independently, thereby improving the refrigeration utilization rate of the whole vehicle.

[0031] In this embodiment, the refrigerator cooling circuit evaporator includes a front trunk refrigerator cooling circuit evaporator 5, an indoor refrigerator cooling circuit evaporator 7 and a trunk refrigerator cooling circuit evaporator 9. A semiconductor refrigerator 11 is provided between the front trunk refrigerator cooling circuit evaporator 5 and the front trunk refrigerator 6. The cooling end of the semiconductor refrigerator 11 is connected to the inner liner of the front trunk refrigerator 6, and the heat dissipation end of the semiconductor refrigerator 11 is in close contact with the front trunk refrigerator cooling circuit evaporator 5; a semiconductor refrigerator 11 is provided between the indoor refrigerator cooling circuit evaporator 7 and the indoor refrigerator 8. The cooling end of the semiconductor refrigerator 11 is connected to the inner liner of the indoor refrigerator 8, and the heat dissipation end of the semiconductor refrigerator 11 is in close contact with the indoor refrigerator cooling circuit evaporator 7; a semiconductor refrigerator 11 is provided between the trunk refrigerator cooling circuit evaporator 9 and the trunk refrigerator 10. The cooling end of the semiconductor refrigerator 11 is connected to the inner liner of the trunk refrigerator 10, and the heat dissipation end of the semiconductor refrigerator 11 is in close contact with the trunk refrigerator cooling circuit evaporator 9.

[0032] Combination Figure 2 As shown, it is a schematic diagram of a fully enclosed refrigerator with a shared compressor; the evaporator tube 13 of the evaporator and the semiconductor refrigerator 11 are buried in the insulation layer 14 of the refrigerator, and the evaporator and the heat dissipation end of the semiconductor refrigerator 11 are attached by direct cooling. The flow of refrigerant through the pipeline can quickly take away the heat, so that the cooling end of the semiconductor refrigerator 11 can be quickly cooled and meet the refrigeration requirement of -18°C. When the semiconductor refrigerator 11 is working, freezing and refrigeration can be achieved; when the semiconductor refrigerator 11 is not working, the cold only passes through the insulation layer and does not refrigerate the compartment. The advantage of the fully enclosed type is that the fully enclosed insulation will not cause energy waste and can achieve a better refrigeration effect; the disadvantage is that due to the insulation effect, the heat conduction at the cold end is weak, and the power consumption of heating through the semiconductor refrigerator 11 will increase.

[0033] Combination Figure 3 The figure shows a schematic diagram of a half-enclosed refrigerator with a shared compressor; the cooling end of the semiconductor refrigerator 11 is buried in the insulation layer 14, and a fin-type heat transfer is arranged inside to transfer heat to the interior of the refrigerator to achieve refrigeration; the heat dissipation end of the semiconductor refrigerator 11 is in close contact with the evaporator branch of the whole machine, and the heat can be quickly taken away through the flow of refrigerant in the pipeline. When the semiconductor refrigerator 11 is working for cooling, freezing and refrigeration can be achieved; when the semiconductor refrigerator 11 is working for heating, the evaporator tube 13 is working, and part of the cold can be taken away due to the temperature difference to achieve cold conduction; when the semiconductor is not working, the evaporator tube 13 and the evaporator fan can be used as a separate air duct for air conditioning refrigeration (hypothetical function). The advantage of the half-enclosed type is that the energy storage device (such as a liquid with a large specific heat capacity) can be expanded inside the evaporator insulation layer, and the stored cold can be used for heat dissipation when the compressor is not working. The disadvantage is that part of the evaporator energy is wasted by direct cooling.

[0034] Feasibility analysis of using semiconductor refrigerator 11 and compressor 1 to cool the vehicle refrigerator:

[0035] 1. Refrigerator insulation calculation

[0036] Refrigerator refrigeration temperature: -18℃~5℃; internal volume: 45L; refrigerant: R134a; insulation layer thickness: 35mm; insulation material: polyurethane foam;

[0037] Refrigerator floor cooling heat transfer calculation under -18℃ refrigeration temperature condition: total cooling leakage 22W; refrigerator outer wall temperature 24℃; vehicle refrigerator design cooling capacity requirement: >30W

[0038] 2. Thermal calculation of semiconductor refrigerator coupled with freon evaporation

[0039] Semiconductor refrigerator preliminary selection: Xinsaier 12705 semiconductor refrigerator; semiconductor size: 40mm*40mm*3mm;

[0040] 12705 Thermal performance parameters of semiconductor cooler: Figure 4 As shown, the hot end temperature Th = 6 ° C, the thermal performance simulation results of the 12705 semiconductor cooler are as follows: Figure 5 As shown, the hot end temperature Th = 27 ° C, the thermal performance simulation results of the 12705 semiconductor cooler are as follows: Figure 6 As shown, the hot end temperature Th = 50 ° C, the thermal performance simulation results of 12705 semiconductor cooler:

[0041] 3. Main performance of semiconductor car refrigerator based on Freon direct cooling

[0042] Two 12705 semiconductor refrigerators are used to build a car refrigerator, based on the thermal performance calculation and the heat transfer calculation of the refrigerator box:

[0043] When driving: when the hot end is 6℃ and the refrigerator refrigeration temperature is -14℃, the maximum cooling capacity can reach 56W and the power consumption is 130W. When the refrigeration temperature is -24℃, the maximum cooling capacity can reach 44W and the power consumption is 140W.

[0044] When parked: When the BTMS coolant temperature is 27°C and the refrigerator cooling temperature is 7°C, the maximum cooling capacity can reach 66W and the power consumption is 120W. When the cooling temperature is -23°C, the maximum cooling capacity can reach 26W and the power consumption is 150W.

[0045] Operation control: This is the power consumption at maximum cooling capacity (fast cooling). After the refrigerator reaches the temperature, it can switch to low power operation. When running at low power, the power consumption is reduced by about 50% compared to the power consumption at maximum cooling.

[0046] In summary, theoretical calculations show that it is feasible to use the semiconductor refrigerator 11 and the compressor 1 together to cool the vehicle refrigerator.

[0047] The above shows and describes the basic principles and main structural features of the present invention. The present invention is not limited to the above examples. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A vehicle-mounted shared compressor refrigeration system, characterized in that: It includes a compressor, a condenser, a battery cooling circuit evaporator, a vehicle air conditioning evaporator, a refrigerator cooling circuit evaporator and a semiconductor refrigerator. The cooling end of the semiconductor refrigerator is connected to the inner tank of the refrigerator, and the heat dissipation end of the semiconductor refrigerator is in close contact with the refrigerator cooling circuit evaporator. After the battery cooling circuit evaporator, the vehicle air conditioning evaporator and the refrigerator cooling circuit evaporator are connected in parallel, one end is connected to the compressor outlet through the condenser, and the other end is connected to the compressor inlet through the gas-liquid separator.

2. The vehicle-mounted shared compressor refrigeration system according to claim 1, characterized in that: The refrigerator cooling circuit evaporator includes a front trunk refrigerator cooling circuit evaporator, an interior refrigerator cooling circuit evaporator and a trunk refrigerator cooling circuit evaporator.

3. The vehicle-mounted shared compressor refrigeration system according to claim 2, characterized in that: A semiconductor refrigerator is arranged between the front trunk refrigerator cooling circuit evaporator and the front trunk refrigerator, the cooling end of the semiconductor refrigerator is connected to the front trunk refrigerator liner, and the heat dissipation end of the semiconductor refrigerator is in close contact with the front trunk refrigerator cooling circuit evaporator.

4. The vehicle-mounted shared compressor refrigeration system according to claim 2, characterized in that: A semiconductor refrigerator is arranged between the evaporator of the indoor refrigerator cooling circuit and the indoor refrigerator. The cooling end of the semiconductor refrigerator is connected to the inner tank of the indoor refrigerator, and the heat dissipation end of the semiconductor refrigerator is in close contact with the evaporator of the indoor refrigerator cooling circuit.

5. The vehicle-mounted shared compressor refrigeration system according to claim 2, characterized in that: A semiconductor refrigerator is arranged between the trunk refrigerator cooling circuit evaporator and the trunk refrigerator, the cooling end of the semiconductor refrigerator is connected to the trunk refrigerator liner, and the heat dissipation end of the semiconductor refrigerator is in close contact with the trunk refrigerator cooling circuit evaporator.

6. The vehicle-mounted shared compressor refrigeration system according to claim 2, characterized in that: Two semiconductor refrigerators are arranged between the front trunk refrigerator cooling circuit evaporator, the interior refrigerator cooling circuit evaporator and the trunk refrigerator cooling circuit evaporator and the corresponding refrigerators.

7. The vehicle-mounted shared compressor refrigeration system according to claim 1, characterized in that: The semiconductor refrigerator adopts the new Saier 12705 semiconductor refrigerator.

8. The vehicle-mounted shared compressor refrigeration system according to claim 1, characterized in that: The cooling end of the semiconductor refrigerator is buried in the corresponding refrigerator insulation layer, and the refrigerator cooling circuit evaporator corresponding to the semiconductor refrigerator is arranged outside the refrigerator insulation layer; a fin-type heat conduction is arranged on the inner side of the cooling end of the semiconductor refrigerator to conduct heat to the refrigerator compartment to achieve refrigeration; the semiconductor refrigerator is in close contact with the corresponding refrigerator cooling circuit evaporator.

9. The vehicle-mounted shared compressor refrigeration system according to claim 1, characterized in that: The semiconductor refrigerator and the corresponding refrigerator cooling circuit evaporator are both buried in the corresponding refrigerator insulation layer, the semiconductor refrigerator is in close contact with the corresponding refrigerator cooling circuit evaporator, and a fin-type heat transfer is arranged on the inner side of the cooling end of the semiconductor refrigerator to conduct heat to the refrigerator compartment to achieve refrigeration.

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