Direct cooling system of vehicle-mounted refrigerator and vehicle using same

Abstract

The utility model discloses a direct cooling system of a vehicle-mounted refrigerator and a vehicle using the same, in the direct cooling system, a compressor is communicated with a condenser, the condenser is communicated with a shunt metering valve, a first output end of the shunt metering valve is communicated with an input end of a first throttling device, and a second output end of the shunt metering valve is communicated with an output end of a second throttling device. The output end of the first throttling device communicates with the input end of the air conditioner evaporator, and the output end of the air conditioner evaporator communicates with the input end of the compressor. The second output end of the flow dividing metering valve is communicated with the input end of the liquid storage tank, the output end of the liquid storage tank is communicated with the input end of the second throttling device, the output end of the second throttling device is communicated with the input end of the refrigerator evaporator, and the output end of the refrigerator evaporator is communicated with the input end of the compressor. When the vehicle-mounted air conditioner has no refrigeration requirement and the vehicle-mounted refrigerator has the refrigeration requirement, all liquid refrigerants in the pipeline are conveyed into the liquid storage tank to be stored through the flow dividing metering valve, and the problems of mechanical abrasion and electrical loss caused by reciprocating start and stop of the compressor are solved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle refrigerator technology, specifically a direct cooling system for a vehicle refrigerator and a vehicle using it. Background Technology

[0002] With the increasing demand for intelligent and comfortable vehicles, in-vehicle refrigerators are gradually being used in most vehicles to meet passengers' needs for refrigerating items such as cold drinks, medicines, and food. However, in the current design of vehicle refrigeration systems, in-vehicle refrigerators and air conditioning systems generally adopt a shared compressor architecture, meaning that they share the same core components such as the compressor and condenser for the same refrigeration cycle.

[0003] Since the cooling demand of vehicle air conditioning systems is much higher than that of vehicle refrigerators, the selection of compressors is often based on the maximum load of the air conditioning system, resulting in the compressor's cooling capacity far exceeding the individual needs of the refrigerator.

[0004] Therefore, when a vehicle only needs the refrigerator to cool while the air conditioner does not need to run, the compressor will frequently start and stop due to the low load demand of the refrigerator, which will easily cause mechanical wear of the compressor and shorten the life of electrical components. Utility Model Content

[0005] To address the aforementioned shortcomings, this invention proposes a direct cooling system for a vehicle-mounted refrigerator and a vehicle using it. When the vehicle's air conditioning has no cooling demand but the refrigerator does, the metering valve transfers all the low-temperature, high-pressure liquid refrigerant in the pipeline to the storage tank for storage. When the storage tank is completely filled with liquid refrigerant, the compressor can stop operating. During subsequent refrigerator cooling, if the cooling demand is within a reasonable range, the system can prioritize using the refrigerant stored in the storage tank to maintain the cooling cycle, eliminating the need for frequent compressor starts and stops. This solves the problem of mechanical wear and electrical losses caused by repeated start-stop cycles, thus shortening the compressor's lifespan.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A direct cooling system for a vehicle refrigerator includes a compressor, a condenser, a first throttling device, a second throttling device, an air conditioning evaporator, and a refrigerator evaporator. The output end of the compressor is connected to the input end of the condenser, the output end of the condenser is connected to the input end of a flow metering valve, the first output end of the flow metering valve is connected to the input end of the first throttling device, the output end of the first throttling device is connected to the input end of the air conditioning evaporator, and the output end of the air conditioning evaporator is connected to the input end of the compressor.

[0008] The second output terminal of the flow metering valve is connected to the input terminal of the second throttling device, the output terminal of the second throttling device is connected to the input terminal of the refrigerator evaporator, and the output terminal of the refrigerator evaporator is connected to the input terminal of the compressor.

[0009] A liquid storage tank is provided between the diversion metering valve and the second throttling device; the input end of the liquid storage tank is connected to the second output end of the diversion metering valve, and the output end of the liquid storage tank is connected to the input end of the second throttling device.

[0010] A first check valve is provided between the liquid storage tank and the diversion metering valve. The input end of the first check valve is connected to the second output end of the diversion metering valve, and the output end of the first check valve is connected to the input end of the liquid storage tank.

[0011] A second one-way valve is provided between the refrigerator evaporator and the compressor. The input end of the second one-way valve is connected to the output end of the refrigerator evaporator, and the output end of the second one-way valve is connected to the input end of the compressor.

[0012] Both the first throttling device and the second throttling device are electronic expansion valves.

[0013] A liquid level sensor is installed inside the liquid storage tank. The liquid level sensor is electrically connected to the compressor through a control module. The liquid level sensor is used to identify the refrigerant liquid level in the liquid storage tank.

[0014] A vehicle including a direct cooling system for an onboard refrigerator.

[0015] The technical solution of this utility model can include the following beneficial effects:

[0016] 1. When the vehicle's air conditioning has no cooling demand but the vehicle's refrigerator does, the metering valve transfers all the low-temperature, high-pressure liquid refrigerant in the pipeline to the receiver tank for storage. Once the receiver tank is completely filled with liquid refrigerant, the compressor can stop operating. During subsequent refrigerator cooling, if the cooling demand is within a reasonable range, the system can prioritize using the refrigerant stored in the receiver tank to maintain the cooling cycle, eliminating the need for frequent compressor starts. This solves the problem of mechanical wear and electrical losses caused by repeated start-stop cycles, thus reducing the compressor's lifespan.

[0017] 2. The first check valve can restrict the refrigerant in the pipeline to flow in only one direction, so that it can smoothly and stably enter the liquid storage tank for storage, effectively preventing the refrigerant from flowing back to the diversion metering valve or other components, and avoiding the adverse effects of refrigerant backflow on the system. Attached Figure Description

[0018] Figure 1This is a schematic diagram of a direct cooling system according to one embodiment of the present invention;

[0019] Among them, 1. compressor; 2. condenser; 3. air conditioner evaporator; 4. refrigerator evaporator; 5. liquid receiver; 6. first throttling device; 7. first one-way valve; 8. second one-way valve; 9. second throttling device; 11. flow metering valve. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] In the description of this utility model, it should be understood that the terms "length", "middle", "upper", "lower", "left", "right", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "assembly," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The following is combined Figure 1 This invention describes a direct cooling system for a vehicle-mounted refrigerator and a vehicle using the same, according to an embodiment of the present invention.

[0025] A direct cooling system for a vehicle refrigerator includes a compressor 1, a condenser 2, a first throttling device 6, a second throttling device 9, an air conditioning evaporator 3, and a refrigerator evaporator 4. The output end of the compressor 1 is connected to the input end of the condenser 2, the output end of the condenser 2 is connected to the input end of a flow metering valve 11, the first output end of the flow metering valve 11 is connected to the input end of the first throttling device 6, the output end of the first throttling device 6 is connected to the input end of the air conditioning evaporator 3, and the output end of the air conditioning evaporator 3 is connected to the input end of the compressor 1.

[0026] The second output terminal of the diversion metering valve 11 is connected to the input terminal of the second throttling device 9, the output terminal of the second throttling device 9 is connected to the input terminal of the refrigerator evaporator 4, and the output terminal of the refrigerator evaporator 4 is connected to the input terminal of the compressor 1.

[0027] A liquid storage tank 5 is provided between the diversion metering valve 11 and the second throttling device 9; the input end of the liquid storage tank 5 is connected to the second output end of the diversion metering valve 11, and the output end of the liquid storage tank 5 is connected to the input end of the second throttling device 9.

[0028] When both the vehicle's air conditioner and refrigerator require cooling, compressor 1 is activated. Compressor 1 compresses the low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant. Condenser 2 liquefies the high-temperature, high-pressure gaseous refrigerant into a low-temperature, high-pressure liquid refrigerant through heat dissipation. Based on the actual cooling needs of the air conditioner and refrigerator, the diversion metering valve 11 directs a portion of the refrigerant through its first output terminal to the air conditioner evaporator 3, and another portion through its second output terminal to the refrigerator's cooling circuit, ensuring the normal operation of both the refrigerator evaporator 4 and the air conditioner evaporator 3.

[0029] The high-pressure liquid refrigerant is throttled and depressurized by the first throttling device 6 and the second throttling device 9 to form a low-temperature, low-pressure liquid refrigerant. Then, the low-temperature, low-pressure liquid refrigerant enters the refrigerator evaporator 4 or the air conditioner evaporator 3, where it absorbs heat from inside the refrigerator or air conditioner, lowering the internal temperature. Simultaneously, the low-temperature, low-pressure liquid refrigerant evaporates into a low-temperature, low-pressure gaseous refrigerant. Finally, the gaseous refrigerant flows out from the output end of the refrigerator evaporator 4 or the air conditioner evaporator 3 and returns to the input end of the compressor 1, completing one refrigeration cycle.

[0030] When the vehicle's air conditioning does not require cooling, but the vehicle's refrigerator does, the diversion metering valve 11 delivers all the high-pressure liquid refrigerant in the pipeline to the liquid storage tank 5 for storage. When the liquid refrigerant completely fills the liquid storage tank 5, the compressor 1 can stop operating.

[0031] During subsequent refrigerator cooling, if the cooling demand is within a reasonable range, the system can prioritize using the refrigerant stored in the liquid tank 5 to maintain the cooling cycle, eliminating the need for frequent starts of compressor 1. This solves the problem of mechanical wear and electrical losses caused by repeated starts and stops of compressor 1, thus shortening the service life of compressor 1.

[0032] A first check valve 7 is provided between the liquid storage tank 5 and the diversion metering valve 11. The input end of the first check valve 7 is connected to the second output end of the diversion metering valve 11, and the output end of the first check valve 7 is connected to the input end of the liquid storage tank 5.

[0033] The first one-way valve 7 can restrict the refrigerant in the pipeline to flow in only one direction, so that it can smoothly and stably enter the liquid storage tank 5 for storage, effectively preventing the refrigerant from flowing back to the diversion metering valve 11 or other components, and avoiding the adverse effects of refrigerant backflow on the system.

[0034] A second one-way valve 8 is provided between the refrigerator evaporator 4 and the compressor 1. The input end of the second one-way valve 8 is connected to the output end of the refrigerator evaporator 4, and the output end of the second one-way valve 8 is connected to the input end of the compressor 1.

[0035] The second one-way valve 8 ensures that the refrigerant can only flow from the refrigerator evaporator 4 to the compressor 1 in one direction, effectively preventing the refrigerant from flowing back into the refrigerator evaporator 4 or other components and then re-entering the compressor 1. When the compressor 1 stops, pressure changes in the pipeline may cause the refrigerant to attempt to flow back. The second one-way valve 8 can promptly block this process, preventing abnormal pressure and flow fluctuations at the compressor 1's inlet, avoiding damage to the compressor 1 due to the intake of unstable refrigerant, and ensuring the safe and stable operation of the compressor 1.

[0036] Both the first throttling device 6 and the second throttling device 9 are electronic expansion valves. Compared to capillary tubes, which have lower control precision, the first throttling device 6 and the second throttling device 9 of this application are preferably electronic expansion valves. Expansion valves can precisely control their opening degree according to system requirements, thereby accurately regulating the refrigerant flow rate and ensuring that the direct cooling system of this application can operate efficiently and stably.

[0037] For example, when the ambient temperature is high and the refrigerator or air conditioner needs stronger cooling capacity, the electronic expansion valve can increase its opening to allow more refrigerant to flow into the refrigerator evaporator 4 or the air conditioner evaporator 3, thereby improving cooling efficiency. When the ambient temperature is low, it can decrease its opening to reduce the refrigerant flow, avoid overcooling, and achieve on-demand refrigerant supply.

[0038] A liquid level sensor is installed inside the liquid storage tank 5. The liquid level sensor is electrically connected to the compressor 1 via a control module. The liquid level sensor is used to identify the refrigerant level in the liquid storage tank 5. Through real-time monitoring by the liquid level sensor, the direct cooling system of this application can promptly detect whether the amount of refrigerant in the liquid storage tank 5 is too much or too little, and take corresponding measures to adjust it, avoiding system performance degradation or malfunction due to improper refrigerant quantity.

[0039] When the liquid level in the liquid receiver 5 is too high, it indicates that the liquid receiver 5 can meet the cooling requirements of the refrigerator evaporator 4. Therefore, after receiving this signal, the control module can shut down the compressor 1 or reduce the operating frequency of the compressor 1 to reduce energy consumption. Conversely, when the liquid level is too low, it indicates that the refrigerant in the liquid receiver 5 cannot meet the cooling requirements of the refrigerator evaporator 4. After receiving the signal, the control module starts the compressor 1 to replenish the refrigerant in the liquid receiver 5, ensuring that the refrigerator cooler can operate normally.

[0040] A vehicle includes a direct cooling system for an in-vehicle refrigerator. Integrating the direct cooling system of this application into a vehicle can significantly improve the cooling performance, energy efficiency ratio, and system stability of the in-vehicle refrigerator and air conditioner, providing vehicle users with a better cooling experience while ensuring the safety and reliability of the cooling function during driving.

[0041] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A direct cooling system for a vehicle refrigerator, characterized by comprising: The system includes a compressor, a condenser, a first throttling device, a second throttling device, an air conditioner evaporator, and a refrigerator evaporator. The output end of the compressor is connected to the input end of the condenser, the output end of the condenser is connected to the input end of a flow metering valve, the first output end of the flow metering valve is connected to the input end of the first throttling device, the output end of the first throttling device is connected to the input end of the air conditioner evaporator, and the output end of the air conditioner evaporator is connected to the input end of the compressor. The second output terminal of the flow metering valve is connected to the input terminal of the second throttling device, the output terminal of the second throttling device is connected to the input terminal of the refrigerator evaporator, and the output terminal of the refrigerator evaporator is connected to the input terminal of the compressor. A liquid storage tank is provided between the diversion metering valve and the second throttling device; the input end of the liquid storage tank is connected to the second output end of the diversion metering valve, and the output end of the liquid storage tank is connected to the input end of the second throttling device.

2. A direct cooling system for a vehicle refrigerator according to claim 1, characterized in that, A first check valve is provided between the liquid storage tank and the diversion metering valve. The input end of the first check valve is connected to the second output end of the diversion metering valve, and the output end of the first check valve is connected to the input end of the liquid storage tank.

3. A direct cooling system for a vehicle refrigerator according to claim 2, wherein A second one-way valve is provided between the refrigerator evaporator and the compressor. The input end of the second one-way valve is connected to the output end of the refrigerator evaporator, and the output end of the second one-way valve is connected to the input end of the compressor.

4. A direct cooling system for a vehicle refrigerator according to claim 3, wherein Both the first throttling device and the second throttling device are electronic expansion valves.

5. A direct cooling system for a vehicle refrigerator according to claim 4, wherein A liquid level sensor is installed inside the liquid storage tank. The liquid level sensor is electrically connected to the compressor through a control module. The liquid level sensor is used to identify the refrigerant liquid level in the liquid storage tank.

6. A vehicle characterized by comprising: The system includes a direct cooling system for a vehicle-mounted refrigerator as described in any one of claims 1-5.

Images