Vehicle-mounted refrigerator heat management system and control method thereof

Abstract

The invention discloses a vehicle-mounted refrigerator thermal management system and a control method thereof, and solves the problems of poor refrigerating capacity and low refrigerating efficiency of a vehicle-mounted refrigerator in the prior art. The vehicle-mounted refrigerator thermal management system comprises a semiconductor refrigerating unit installed on the outer surface of a refrigerator cavity, and a liquid cooling structure is installed on the semiconductor refrigerating unit; the liquid cooling structure is connected with an integrated compressor refrigerating system through a first flow adjusting device, and the integrated compressor refrigerating system is connected with a liquid flow distributing device. The liquid flow distribution device adjusts the flow adjusting device and the integrated compression refrigeration system according to the temperature change relation between the different outer surfaces of the refrigerator cavity. The water cooling plate is adopted to wrap the outer wall of the inner container of the refrigerator, the heat dissipation uniformity in the cavity between the inner container and the refrigerator shell is improved, heat dissipation is conducted through cooling liquid provided by the integrated compressor refrigeration system, the heat dissipation effect is good, precise heat dissipation can be conducted on a certain side face of the refrigerator, and the refrigeration efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted thermal management, and in particular to a vehicle-mounted refrigerator thermal management system and a control method thereof. Background Art

[0002] With the rapid development of new energy vehicles in China, car refrigerators have gradually become a major highlight for major automobile manufacturers to attract buyers. At present, most car refrigerators on the market use independent compressor refrigeration systems or a refrigeration method in semiconductor refrigeration. These refrigeration methods often have certain disadvantages. Independent car refrigerators are limited by the space of the whole vehicle, and the size of components such as compressors and condensers cannot be too large, which limits the refrigeration capacity of the refrigerator; semiconductor refrigeration refrigerators are limited by the characteristics of the semiconductor refrigeration film itself. The greater the temperature difference between the inside and outside of the refrigerator, the lower the refrigeration efficiency. When the temperature difference is close to 20°C, the refrigerator has almost no refrigeration effect. The low refrigeration performance of the above refrigerators has led to the fact that car passengers often have to wait for one or two hours before they can drink cold drinks, and the user experience is poor. Therefore, there is an urgent need for a refrigerator that can achieve rapid cooling on the market to meet the needs of car refrigerator users. Summary of the invention

[0003] The purpose of the present invention is to overcome the problems of poor refrigeration capacity and low refrigeration efficiency of vehicle refrigerators in the prior art, and provide a vehicle refrigerator thermal management system and a control method thereof, which is an integrated temperature control solution. A liquid cooling structure is used to wrap the outer wall of the refrigerator inner tank, thereby increasing the uniformity of heat dissipation in the cavity between the inner tank and the refrigerator shell. The heat dissipation of the semiconductor refrigeration plate is carried out through the cooling liquid provided by the integrated compressor refrigeration system, which has a good heat dissipation effect and can accurately dissipate heat on a certain side of the refrigerator, thereby improving the refrigeration efficiency and achieving a better refrigeration effect.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A thermal management system for a vehicle refrigerator comprises: a semiconductor refrigeration unit installed on the outer surface of a refrigerator cavity, a liquid cooling structure installed on the semiconductor refrigeration unit, the liquid cooling structure is connected to an integrated compressor refrigeration system via a first flow regulating device, the integrated compressor refrigeration system is connected to a liquid flow distribution device, the liquid flow distribution device regulates the flow regulating device and the integrated compression refrigeration system according to the refrigerator temperature, and finely regulates the flow regulating device according to the temperature change relationship between different outer surfaces of the refrigerator cavity.

[0005] Car refrigerators have separate TEC-type temperature control or separate compressor-type temperature control, which to a certain extent results in low energy efficiency. At the same time, the compressor refrigerators in car refrigerators have defects such as noise and large space occupied by the compressor, and the TEC-type car refrigerators have the defect of insufficient refrigeration capacity. The liquid cooling structure is used to wrap the outer wall of the refrigerator liner to increase the heat dissipation uniformity in the cavity between the liner and the refrigerator shell. The heat dissipation of the semiconductor refrigeration plate is carried out through the cooling liquid provided by the integrated compressor refrigeration system, which has a good heat dissipation effect and can accurately dissipate heat on a certain side of the refrigerator, improve the refrigeration efficiency, and achieve better refrigeration effect.

[0006] Preferably, a first cooling area and a second cooling area are arranged in the refrigerator cavity, a semiconductor refrigeration unit is installed on the outer surface corresponding to the first cooling area, and a cooling water pipe is installed on the outer surface corresponding to the second cooling area. The cooling water pipe is connected to the integrated compressor refrigeration system, and a cooling water pipe is arranged to separate the first cooling area and the second cooling area.

[0007] Preferably, the liquid cooling structure includes a water cooling plate installed on each side of the refrigerator cavity, and a semiconductor refrigeration unit is provided on the water cooling plate and the side of the refrigerator cavity. The water cooling plate is connected to a main liquid inlet pipe through a branch pipe, and the main liquid inlet pipe is connected to an integrated compressor refrigeration system.

[0008] Preferably, the first flow regulating device comprises a main flow regulating valve and an auxiliary flow regulating valve, the main flow regulating valve is installed on the main liquid inlet pipe, and the auxiliary flow regulating valve is installed on the branch pipe.

[0009] Preferably, according to a vehicle refrigerator thermal management system according to claim 1, 2 or 3, it is characterized in that the flow regulating device includes a temperature sensor and a main control module.

[0010] Preferably, the integrated compressor refrigeration system comprises a water tank and an evaporating tube installed in the water tank, the water tank is connected, the evaporating tube is connected to a compressor, the compressor is connected to a condenser, and the condenser is connected to the evaporating tube.

[0011] Preferably, a drying and filtering device and a capillary tube are provided between the condenser and the evaporating tube.

[0012] Preferably, the integrated compressor refrigeration system is connected to an air-conditioning system and a seat ventilation system, and a third flow regulating device is provided between the air-conditioning system and the integrated compression refrigeration system; a second flow regulating device is provided between the seat ventilation system and the integrated compression refrigeration system.

[0013] Multiple heat exchange systems use the same integrated compression refrigeration system for cooling, which saves internal space layout while ensuring cooling capacity and reducing noise.

[0014] A method for controlling a thermal management system of a vehicle refrigerator comprises the following steps: S1: Obtain the refrigeration demand of the vehicle refrigerator and determine the initial working parameters of the thermal management system; S2: Collect the temperature of the vehicle refrigerator, and control the compressor power and the opening of the flow regulating device according to the relationship between the temperature change trend of the vehicle refrigerator and the target temperature; S3: When the temperature of the car refrigerator reaches the target temperature -M degrees Celsius, stop refrigeration and enter the self-circulation mode. Adjust the opening of the first flow regulating device according to the temperature of the car refrigerator until the temperature of the car refrigerator reaches the target temperature +N degrees Celsius, and then return to step S2.

[0015] Preferably, if there are multiple heat exchange systems that simultaneously use an integrated compression refrigeration system for cooling, the opening of the flow regulating device corresponding to each heat exchange system is determined according to the current temperature change trend of each heat exchange system and the ratio of the current temperature to the target temperature.

[0016] Preferably, the thermal management process of the vehicle refrigerator is monitored in real time. If an abnormality occurs in a thermal management component or sensor, the abnormal state is diagnosed, the fault level is reported, and a fault report is generated; and the fault is processed according to the fault level.

[0017] Therefore, the present invention has the following beneficial effects: 1. Use a water-cooled plate to wrap the outer wall of the refrigerator tank to increase the uniformity of heat dissipation in the cavity between the inner tank and the refrigerator shell. At the same time, compared with direct compressor refrigeration or TEC refrigerators, it is more maintainable and only requires disconnecting the water connection interface.

[0018] 2. The heat dissipation of the semiconductor refrigeration chip is carried out through the cooling liquid provided by the integrated compressor refrigeration system, which has good heat dissipation effect, improves the refrigeration efficiency, and has a better refrigeration effect of the refrigerator.

[0019] 3. It shares an integrated compression refrigeration system with the vehicle's thermal management system, which has lower costs and achieves a larger storage space under the same boundary conditions. It saves internal space layout while ensuring refrigeration capacity and reduces noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the architecture of the vehicle refrigerator thermal management system in Example 1.

[0021] Figure 2 This is a schematic diagram of the architecture of the vehicle refrigerator thermal management system in Example 3.

[0022] Figure 3 This is a schematic diagram of the cooling pipeline of the automobile seat back in Example 3.

[0023] Figure 4 This is a flow chart of the steps of the vehicle refrigerator thermal management system control method in Example 4.

[0024] In the figure: 1. Refrigerator cavity; 2. Semiconductor refrigeration unit; 3. Water cooling plate; 4. Drying and filtering device; 5. Fan; 6. Condenser; 7. Compressor; 8. Evaporation tube; 9. Water tank; 10. Water pump; 11. Capillary tube; 12. Electronic expansion valve; 13. Car air conditioning system; 14. Car seat ventilation system; 15. Flow regulating valve; 16. Car refrigerator; 17. Main line; 18. Auxiliary line. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: Embodiment 1: like Figure 1 In the illustrated embodiment, a vehicle-mounted refrigerator thermal management system can be seen, comprising: a refrigerator cavity 1, a semiconductor refrigeration unit 2, a liquid cooling structure, a first flow regulating device, an integrated compressor refrigeration system and a liquid flow distribution device, the semiconductor refrigeration unit is mounted on the outer surface of the refrigerator cavity, the liquid cooling structure is mounted on the semiconductor refrigeration unit, the liquid cooling structure is connected to the first flow regulating device, the first flow regulating device is connected to the integrated compressor refrigeration system, and the integrated compressor refrigeration system is connected to the liquid flow distribution device.

[0026] The thermal management system of a vehicle refrigerator provided in this embodiment wraps the outer wall of the inner tank of the refrigerator through a liquid cooling structure, thereby increasing the heat dissipation uniformity in the cavity between the inner tank and the refrigerator shell. The heat dissipation of the semiconductor refrigeration plate is carried out through the cooling liquid provided by the integrated compressor refrigeration system, and the heat dissipation effect is good. The liquid cooling structure on a certain side of the refrigerator can be adjusted to achieve precise heat dissipation, improve refrigeration efficiency, and achieve better refrigeration effect.

[0027] The technical scheme and technical effects of the present invention will be further described below through specific examples. The following examples are explanations of the present invention and the present invention is not limited to the following examples.

[0028] In this embodiment, the liquid cooling structure includes a water cooling plate, a branch pipe and a main liquid inlet pipe. The water cooling plate 3 is installed on each side (top, bottom, left and right sides and back) of the refrigerator cavity. A semiconductor refrigeration unit is provided between the water cooling plate and each side of the refrigerator cavity. Each water cooling plate is connected to the main liquid inlet pipe through a branch pipe, and the main liquid inlet pipe is connected to the integrated compressor refrigeration system. Because the heat is dissipated by water cooling, the occupied size is small), the TEC heat dissipation is performed by the liquid provided by the integrated compressor refrigeration system, which is better than the air cooling heat dissipation effect, improves the overall refrigeration efficiency, and can make the refrigerator refrigeration effect better.

[0029] On the one hand, the liquid cooling structure can be used as a heat dissipation mechanism to dissipate heat from the semiconductor refrigeration unit. On the other hand, it can also be used as a cold storage structure to store the cooling capacity of the compressor refrigeration system. After the compressor is turned off, the cold capacity stored in the water circuit can continue to be used for heat dissipation, saving energy.

[0030] The first flow regulating device includes a main flow regulating valve and an auxiliary flow regulating valve. The main flow regulating valve is installed on the main liquid inlet pipe, and the auxiliary flow regulating valve is installed on the branch pipe. The main flow regulating valve cooperates with the compressor to regulate the temperature of the refrigerator; the auxiliary flow regulating valve is used to regulate a certain side of the refrigerator separately.

[0031] For example, if during the overall control process, it is detected that the temperature rise rate or temperature value of a certain side of the refrigerator exceeds the threshold, the opening of the auxiliary flow control valve corresponding to the side will be increased to perform a separate and strong cooling on the side.

[0032] The integrated compressor refrigeration system includes a water tank 9, an evaporating tube 8, a compressor 7, a condenser 6, a fan 5, a drying and filtering device 4, a water pump 10, and a capillary tube 11. The evaporating tube is installed in the water tank, the evaporating tube outlet is connected to the compressor inlet, the compressor outlet is connected to the condenser inlet, the condenser outlet is connected to the drying and filtering device and the capillary tube in sequence, and the capillary tube is connected to the evaporating tube inlet; the water tank inlet is connected to the water cooling plate outlet, the water cooling plate inlet is connected to the water tank outlet, the water tank inlet is provided with a flow meter, and the water tank outlet is provided with a temperature sensor and a water pump.

[0033] When the integrated compressor refrigeration system is working, the compressor starts, compresses the refrigerant, and outputs high-temperature refrigerant gas. The refrigerant gas is transmitted to the condenser, releases heat through the condenser and liquefies into a high-temperature, normal-pressure liquid. When the condenser releases heat, the fan dissipates heat from the condenser and takes away the heat from the condenser.

[0034] The flow regulating device includes a main control module, a temperature sensor installed at the water tank outlet, and a temperature sensor installed on each outer side of the refrigerator cavity. The flow regulating device adjusts the compressor power and the opening of the main flow regulating valve and the opening of the auxiliary flow regulating valve according to the temperature data detected by the temperature sensor.

[0035] The car refrigerator is a liquid-cooled refrigerator, which is easier to maintain and more uniform than traditional refrigeration refrigerators. The liquid flows through the outer wall of the refrigerator inner tank and is wrapped around the outer wall through a water pipe, increasing the uniformity of the problem in the cavity. At the same time, compared with direct compressor refrigeration or TEC refrigerators, it is more maintainable and only requires disconnecting the water connection interface.

[0036] The vehicle refrigerator thermal management system provided by this embodiment can achieve the following beneficial effects: 1. Use a water-cooled plate to wrap the outer wall of the refrigerator tank to increase the uniformity of heat dissipation in the cavity between the inner tank and the refrigerator shell. At the same time, compared with direct compressor refrigeration or TEC refrigerators, it is more maintainable and only requires disconnecting the water connection interface.

[0037] 2. The heat dissipation of the semiconductor refrigeration chip is carried out through the cooling liquid provided by the integrated compressor refrigeration system, which has good heat dissipation effect, improves the refrigeration efficiency, and has a better refrigeration effect of the refrigerator.

[0038] 3. It can accurately dissipate heat on a certain side of the refrigerator, improve refrigeration efficiency, and achieve better refrigeration effect.

[0039] Embodiment 2: The present embodiment provides a vehicle refrigerator thermal management system, which is different from the vehicle refrigerator thermal management system provided in the first embodiment in that, in the present embodiment, a first cooling area and a second cooling area are arranged in the refrigerator cavity, wherein the first cooling area is a rapid cooling area, a semiconductor refrigeration unit is installed on the outer surface of the first cooling area, the first cooling area is dissipated by the semiconductor refrigeration unit, and a liquid cooling structure (a water cooling plate in the present embodiment) is installed on the semiconductor; the second cooling area is a constant speed cooling area, a liquid cooling structure is installed on the outer surface of the second cooling area, and the first cooling area is dissipated by the liquid cooling structure.

[0040] The first cooling area and the second cooling area are separated by a liquid cooling structure.

[0041] The use of two cooling areas can meet the temperature requirements of different foods. It can cool down quickly to meet user needs, or it can cool down at a constant speed to save resources.

[0042] Embodiment three: This embodiment provides a thermal management system for a car refrigerator and applies it in a specific scenario. At present, the systems in the car field that directly experience heat exchange with the occupants include the car air conditioning system, the car seat ventilation system, the car refrigerator, etc. The car air conditioning system is often implemented by a compressor temperature control system, the seat ventilation is often driven by a fan, and the car refrigerator has TEC temperature control or compressor temperature control. The several major systems are relatively independent, which to a certain extent causes low energy efficiency. At the same time, the compressor temperature control car refrigerator has the defects of noise and large space occupied by the compressor, and the TEC temperature control car refrigerator has the defect of insufficient refrigeration capacity.

[0043] This embodiment provides a vehicle-mounted liquid cooling thermal management system including battery temperature control, such as Figure 2 As shown, it includes a vehicle air-conditioning system, a seat ventilation system, a vehicle refrigerator system, a vehicle battery pack system, a liquid flow distribution device and an integrated compressor refrigeration system. The water outlets of the vehicle air-conditioning system, the seat ventilation system, the vehicle refrigerator system and the vehicle battery pack system are all connected to the water inlet of the integrated compressor refrigeration system, the water inlets of the vehicle air-conditioning system, the seat ventilation system, the vehicle refrigerator system and the vehicle battery pack system are all connected to the water outlet of the integrated compressor refrigeration system, and the vehicle air-conditioning system, the seat ventilation system, the vehicle refrigerator system and the vehicle battery pack system are all connected to the liquid flow distribution device.

[0044] Specific: The integrated compressor refrigeration system includes a water inlet pipe, a water outlet pipe, a water tank, an evaporating tube, an electronic expansion valve 12, a first drying filter, a second drying filter, a fan, a condenser, a compressor, and a water pump, wherein the water inlet pipe is connected to the water outlet of the vehicle air-conditioning system, the seat ventilation system, the vehicle refrigerator system, and the vehicle battery pack system, and the water inlet pipe is connected to the water inlet of the water tank; the water outlet pipe is connected to the water inlet end of the vehicle air-conditioning system, the seat ventilation system, the vehicle refrigerator system, and the vehicle battery pack system, and the water outlet pipe is connected to the water outlet of the water tank; the evaporating tube is installed in the water tank, the evaporating tube outlet is connected to the compressor, the compressor is connected to the condenser, the fan is installed next to the condenser, the condenser is connected to the second drying filter, the second drying filter is connected to the first drying filter, the first drying filter is connected to the electronic expansion valve, and the electronic expansion valve is connected to the evaporating tube inlet.

[0045] When the integrated compressor refrigeration system is working, the compressor starts, compresses the refrigerant, and outputs high-temperature refrigerant gas. The refrigerant gas is transmitted to the condenser, releases heat through the condenser and liquefies into a high-temperature, normal-pressure liquid. When the condenser releases heat, the fan dissipates heat from the condenser and takes away the heat from the condenser.

[0046] The high-temperature and normal-pressure liquid is filtered and dried through the second drying filter and the first drying filter, and then enters the throttling element - the electronic expansion valve. The electronic expansion valve reduces the pressure and temperature of the refrigerant at the same time. The refrigerant passing through the electronic expansion valve flows into the evaporator installed in the water tank, and absorbs the heat of the cooling water heated by the vehicle air conditioning system, seat ventilation system, vehicle refrigerator system and vehicle battery pack system in the evaporator. Then the refrigerant flows into the compressor through the evaporator, and the compressor compresses the refrigerant to form a refrigeration cycle. The cooled cooling water in the water tank flows into the vehicle air conditioning system, seat ventilation system, vehicle refrigerator system and vehicle battery pack system from the water outlet pipe through the water pump, cooling the vehicle air conditioning system, seat ventilation system, vehicle refrigerator system and vehicle battery pack system.

[0047] The vehicle air conditioning system includes a fan and a liquid heat exchanger. The fan blows the air through the evaporator tube of the air conditioning system for direct cooling. That is, the evaporator tube first cools the liquid, and then the fan drives the air through the liquid heat exchanger for cooling.

[0048] The car seat ventilation system includes a heating device to simultaneously realize a cold air and hot air system. It also includes cooling pipes installed under the car seat back and the car seat cushion. The cooling water in the water tank flows through the cooling pipes to dissipate the heat of the car seat back and the car seat cushion.

[0049] Among them, the cooling pipes under the car seat back and the car seat cushion are independent of each other and can be cooled separately. And the cooling pipes on the car seat back include main pipes and auxiliary pipes. As shown in Figure 3, the main pipes and the auxiliary pipes are interlocked and independent of each other and can be cooled separately. If the temperature of the car seat back is lower than the first backrest temperature threshold, the main pipe and the auxiliary pipe are not opened. If the temperature of the car seat back reaches the second backrest temperature threshold, the main pipe is opened. If the temperature of the car seat back reaches the third backrest temperature threshold, the auxiliary pipe is opened. The same applies to the cooling pipes under the car seat cushion.

[0050] The car refrigerator system includes an inner tank and a cooling pipe installed on the outer wall of the inner tank. The cooling liquid flows through the outer wall of the refrigerator inner tank and is wrapped by the cooling pipe to increase the uniformity of heat dissipation in the cavity. At the same time, compared with direct compressor refrigeration or TEC refrigerator, it is more maintainable and only requires disconnecting the water connection interface.

[0051] Specifically: it includes a semiconductor refrigeration unit installed on the outer surface of the refrigerator cavity, a liquid cooling structure is installed on the semiconductor refrigeration unit, the liquid cooling structure is connected to the integrated compressor refrigeration system through a first flow regulating device, and the integrated compressor refrigeration system is connected to the liquid flow distribution device.

[0052] On-board battery pack system: battery pack and coolant that immerses the battery pack, the coolant is connected to the integrated compressor refrigeration system.

[0053] The liquid flow distribution device includes a main control module, a first flow valve, a second flow valve, a third flow valve, a fourth flow valve, a first temperature sensor, a second temperature sensor, a third temperature sensor and a fourth temperature sensor. The first flow valve is arranged between the water outlet of the vehicle refrigerator system and the water inlet of the integrated compressor refrigeration system, and the first temperature sensor is installed on the vehicle refrigerator system; the second flow valve is arranged between the water outlet of the seat ventilation system and the water inlet of the integrated compressor refrigeration system, and the second temperature sensor is installed on the seat ventilation system; the third flow valve is arranged between the water outlet of the vehicle air-conditioning system and the water inlet of the integrated compressor refrigeration system, and the third temperature sensor is installed on the vehicle air-conditioning system; the fourth flow valve is arranged between the water outlet of the vehicle battery pack system and the water inlet of the integrated compressor refrigeration system, and the fourth temperature sensor is installed on the vehicle battery pack system; the first flow valve, the second flow valve, the third flow valve and the fourth flow valve are all connected to the main control module, and the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor are all connected to the main control module. The first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor collect temperature data of their respective systems and transmit them to the main control module. The main control module adjusts the opening of the first flow valve, the second flow valve, the third flow valve and the fourth flow valve according to the temperature data, thereby controlling the temperature of the vehicle refrigerator system, the seat ventilation system, the vehicle air conditioning system and the vehicle battery pack system respectively.

[0054] When the liquid flow distribution device is working, it mainly includes: individual control and combined control.

[0055] When controlled separately (i.e. only one of the vehicle air conditioning system, seat ventilation system, vehicle refrigerator system, and vehicle battery pack system is working): When controlling the refrigeration of the vehicle refrigerator system, the liquid flow distribution device controls the first flow regulating valve, the first temperature sensor, and the water pump to be turned on, and the third flow regulating valve, the third temperature sensor, the second flow regulating valve, the second temperature sensor, the fourth flow regulating valve, and the fourth temperature sensor to be turned off, and the opening of the second flow regulating valve and the refrigeration power of the compressor are controlled according to the data of the second temperature sensor; When controlling the cooling of the automobile seat ventilation system, the liquid flow distribution device controls the second flow regulating valve, the second temperature sensor, and the water pump to be turned on, and the first flow regulating valve, the first temperature sensor, the third flow regulating valve, the third temperature sensor, the fourth flow regulating valve, and the fourth temperature sensor to be turned off, and the opening of the second flow regulating valve and the cooling power of the compressor are controlled according to the data of the second temperature sensor; When controlling the vehicle air conditioning system to cool, the liquid flow distribution device controls the third flow regulating valve and the third temperature sensor to open, and the first flow regulating valve, the first temperature sensor, the second flow regulating valve, the second temperature sensor, the fourth flow regulating valve, the fourth temperature sensor and the water pump to close; When controlling the refrigeration of the vehicle battery pack system, the liquid flow distribution device controls the fourth flow regulating valve, the fourth temperature sensor, and the water pump to open, and the first flow regulating valve, the first temperature sensor, the second flow regulating valve, the second temperature sensor, the third flow regulating valve, and the third temperature sensor to close, and controls the opening of the fourth flow regulating valve and the refrigeration power of the compressor according to the data of the fourth temperature sensor.

[0056] When joint control is used (i.e. only one or more of the vehicle air conditioning system, seat ventilation system, vehicle refrigerator system, and vehicle battery pack system are working at the same time): The cooling demand of each heat exchange system is obtained, and the compressor power and the opening of the flow control valve on each heat exchange system are adjusted according to the ratio of the actual temperature of each heat exchange system to the target temperature.

[0057] This embodiment provides a vehicle-mounted liquid cooling and heat management system with a precision temperature-controlled refrigerator, which realizes the integration of the vehicle-mounted air-conditioning system + vehicle-mounted refrigerator + vehicle seat ventilation system through an integrated compression refrigeration system, and outputs liquid at a suitable temperature through an integrated compression refrigeration system, and delivers it to the air-conditioning system, vehicle-mounted refrigerator system, and seat ventilation and heating system, so as to realize the relatively independent temperature control of each system. While ensuring the refrigeration capacity, it saves the internal space layout and reduces the noise.

[0058] The vehicle refrigerator thermal management system provided by this embodiment can achieve the following beneficial effects: The vehicle air conditioning system, car seat ventilation system, vehicle refrigerator and the vehicle's thermal management system share an integrated compression refrigeration system, which has lower costs and achieves a larger storage space under the same boundary conditions. It saves internal space layout while ensuring refrigeration capacity and reduces noise.

[0059] Embodiment 4: like Figure 2In the illustrated embodiment, a method for controlling a thermal management system of a vehicle refrigerator can be seen, and its operation process is as follows: step one, obtaining the refrigeration demand of the vehicle refrigerator and determining the initial working parameters of the thermal management system; step two, collecting the temperature of the vehicle refrigerator, and controlling the compressor power and the opening of the flow regulating device according to the relationship between the temperature change trend of the vehicle refrigerator and the target temperature; step three, when the temperature of the vehicle refrigerator reaches the target temperature -M degrees Celsius, stopping refrigeration and entering the self-circulation mode, adjusting the opening of the first flow regulating device according to the temperature of the vehicle refrigerator, and returning to step two after the temperature of the vehicle refrigerator reaches the target temperature +N degrees Celsius.

[0060] This embodiment also includes: real-time monitoring of the thermal management process of the vehicle refrigerator. If an abnormality occurs in the thermal management components (i.e., the various components of the thermal management system) or the sensor, the abnormal state is diagnosed, the fault level is reported, and a fault report is generated; and the fault is processed according to the fault level.

[0061] The control method provided in this embodiment monitors the temperature of the vehicle refrigerator in real time and adjusts the compressor and the flow regulating device in real time, thereby meeting the refrigerator refrigeration requirements under different conditions, improving refrigeration efficiency and saving energy.

[0062] The technical scheme and technical effects of the present invention will be further described below through specific examples. The following examples are explanations of the present invention and the present invention is not limited to the following examples.

[0063] Step 1: Obtain the refrigeration requirements of the vehicle refrigerator and determine the initial operating parameters of the thermal management system.

[0064] The car starts and there are no faults. According to the refrigeration requirements of the car refrigerator and the initial working parameters, the integrated compressor refrigeration system starts to run at a low speed. At this time, the flow regulating device opening is adjusted to the middle value.

[0065] Step 2: Collect the temperature of the car refrigerator, and control the compressor power and the opening of the flow regulating device according to the relationship between the temperature change trend of the car refrigerator and the target temperature.

[0066] If the temperature value approaches the target temperature and the current temperature change rate of the vehicle refrigerator reaches the first temperature threshold, the current compressor power and the opening of the flow regulating device are maintained unchanged.

[0067] If the temperature value approaches the target temperature and the current temperature change rate of the vehicle refrigerator reaches the second temperature threshold, the opening of the flow regulating device is increased.

[0068] If the temperature value approaches the target temperature and the current vehicle refrigerator temperature change rate reaches the third temperature threshold, the compressor power is increased; If the temperature value moves away from the target temperature, the compressor power is increased.

[0069] Among them, the first temperature threshold is greater than the second temperature threshold and greater than the third temperature threshold.

[0070] During adjustment, if there are multiple heat exchange systems that use the integrated compression refrigeration system for cooling at the same time, the opening of the flow regulating device corresponding to each heat exchange system is determined according to the current temperature change trend of each heat exchange system and the ratio of the current temperature to the target temperature.

[0071] For example, if two heat exchange systems both need cooling, because they use the same compressor cooling system, if the temperature change trend of one of the heat exchange systems and the ratio of the current temperature to the target temperature are both smaller than the temperature change trend of the other heat exchange system, then the valve opening of the flow control valve corresponding to the heat exchange system is increased.

[0072] If there are two heat exchange systems, one needs cooling and the other needs heating, the heat exchange system with a slower temperature change trend and a larger ratio of the current temperature to the target temperature is operated first, then the flow regulating valve of the heat exchange system is closed, and the flow regulating valve of the other heat exchange system is opened for operation.

[0073] Step 3: When the temperature of the car refrigerator reaches the target temperature -M degrees Celsius, stop refrigeration and enter the self-circulation mode. Adjust the opening of the first flow regulating device according to the temperature of the car refrigerator. Return to step 2 until the temperature of the car refrigerator reaches the target temperature +N degrees Celsius.

[0074] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. A thermal management system for a vehicle refrigerator, characterized in that: include: A semiconductor refrigeration unit is installed on the outer surface of the refrigerator cavity, and a liquid cooling structure is installed on the semiconductor refrigeration unit. The liquid cooling structure is connected to an integrated compressor refrigeration system through a first flow regulating device. The integrated compressor refrigeration system is connected to a liquid flow distribution device. The liquid flow distribution device regulates the flow regulating device and the integrated compression refrigeration system according to the refrigerator temperature, and finely regulates the flow regulating device according to the temperature change relationship between different outer surfaces of the refrigerator cavity.

2. A vehicle refrigerator thermal management system according to claim 1, characterized in that: The liquid cooling structure includes a water cooling plate installed on each side of the refrigerator cavity, and a semiconductor refrigeration unit is provided between the water cooling plate and the side of the refrigerator cavity. The water cooling plate is connected to a main liquid inlet pipe through a branch pipe, and the main liquid inlet pipe is connected to an integrated compressor refrigeration system.

3. A vehicle refrigerator thermal management system according to claim 2, characterized in that: The first flow regulating device comprises a main flow regulating valve and an auxiliary flow regulating valve. The main flow regulating valve is installed on the main liquid inlet pipe, and the auxiliary flow regulating valve is installed on the branch pipe.

4. The vehicle refrigerator thermal management system according to claim 1, characterized in that: A first cooling area and a second cooling area are arranged in the refrigerator cavity, a semiconductor refrigeration unit is installed on the outer surface corresponding to the first cooling area, a cooling water pipe is installed on the outer surface corresponding to the second cooling area, the cooling water pipe is connected to the integrated compressor refrigeration system, and a cooling water pipe is arranged between the first cooling area and the second cooling area.

5. A vehicle refrigerator thermal management system according to claim 1 or 2 or 3 or 4, characterized in that: The integrated compressor refrigeration system comprises a water tank and an evaporating tube installed in the water tank, the water tank is connected, the evaporating tube is connected to a compressor, the compressor is connected to a condenser, and the condenser is connected to the evaporating tube.

6. The vehicle refrigerator thermal management system according to claim 5, characterized in that: A drying and filtering device and a capillary tube are arranged between the condenser and the evaporation tube.

7. A vehicle refrigerator thermal management system according to claim 1, 2, 3 or 4, characterized in that: The integrated compressor refrigeration system is connected to an air-conditioning system and a seat ventilation system, a third flow regulating device is provided between the air-conditioning system and the integrated compression refrigeration system; a second flow regulating device is provided between the seat ventilation system and the integrated compression refrigeration system.

8. A control method for a vehicle refrigerator thermal management system, applied to a vehicle refrigerator thermal management system according to any one of claims 1 to 7, characterized in that: Includes steps: S1: Obtain the refrigeration demand of the vehicle refrigerator and determine the initial working parameters of the thermal management system; S2: Collect the temperature of the vehicle refrigerator, and control the compressor power and the opening of the flow regulating device according to the relationship between the temperature change trend of the vehicle refrigerator and the target temperature; S3: When the temperature of the car refrigerator reaches the target temperature -M degrees Celsius, stop refrigeration and enter the self-circulation mode. Adjust the opening of the first flow regulating device according to the temperature of the car refrigerator until the temperature of the car refrigerator reaches the target temperature +N degrees Celsius, and then return to step S2.

9. A vehicle refrigerator thermal management system control method according to claim 8, characterized in that: If there are multiple heat exchange systems that use the integrated compression refrigeration system for cooling at the same time, the opening of the flow regulating device corresponding to each heat exchange system is determined according to the current temperature change trend of each heat exchange system and the ratio of the current temperature to the target temperature.

10. A vehicle refrigerator thermal management system control method according to claim 8 or 9, characterized in that: The thermal management process of the vehicle refrigerator is monitored in real time. If an abnormality occurs in the thermal management component or sensor, the abnormal state is diagnosed, the fault level is reported, and a fault report is generated; and the fault is handled according to the fault level.

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