Vehicle thermal management system and vehicle having same

Abstract

A vehicle thermal management system (100), comprising: an air conditioning subsystem, a first refrigerant branch (12a) and a heat regeneration device (40). The air conditioning subsystem comprises a compressor (31) and a first heat exchange branch (32a), the first heat exchange branch (32a) being separately connected to an exhaust port (31b) and an intake port (31a) of the compressor (31), and the first heat exchange branch (32a) being used for adjusting the cabin temperature. The first refrigerant branch (12a) is separately connected to the exhaust port (31b) and the intake port (31a) and is suitable for adjusting the internal temperature of a storage box (200). The heat regeneration device (40) is separately connected to the first refrigerant branch (12a) and the intake port (31a), and the heat regeneration device (40) is configured to be at least used for heating a refrigerant flowing from the first refrigerant branch (12a) to the intake port (31a). Also disclosed is a vehicle using the heat management system. In the thermal management system, the heat regeneration device (40) is provided between the first refrigerant branch (12a) and the intake port of the compressor (31), so that a liquid-state refrigerant is heated and gasified to prevent the problem of liquid strike on the compressor caused by excessive liquid-state refrigerant, thereby preventing the compressor from being damaged.

Description

Vehicle thermal management system and vehicle having the same

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 2023231297786, filed on November 17, 2023, entitled “Thermal management system for a vehicle and a vehicle having the same,” the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of vehicles, and in particular to a vehicle thermal management system and a vehicle having the same. Background Art

[0004] In related technologies, a vehicle's refrigerator system and its thermal management system are two independent systems. When the refrigerator system is added to the thermal management system, most of the liquid refrigerant will not be vaporized due to the limited cooling demand of the refrigerator system, resulting in excessive liquid refrigerant in the thermal management system and the risk of liquid refrigerant hitting the compressor.

[0005] Summary of the Invention

[0006] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to propose a vehicle thermal management system that is equipped with a heat recovery device to heat the liquid refrigerant to a gaseous refrigerant, thereby avoiding the occurrence of liquid hammer problems.

[0007] The present application further proposes a vehicle having the above thermal management system.

[0008] The thermal management system according to the present application is used for a vehicle, and the vehicle has a storage box. The thermal management system includes: an air-conditioning subsystem, the air-conditioning subsystem includes a compressor and a first heat exchange branch, the first heat exchange branch is respectively connected to the exhaust port and the intake port of the compressor, and the first heat exchange branch is used to adjust the cabin temperature; a first refrigerant branch, the first refrigerant branch is respectively connected to the exhaust port and the intake port and is suitable for adjusting the temperature in the storage box; a heat recovery device, the heat recovery device is respectively connected to the first refrigerant branch and the intake port, and the heat recovery device is configured to at least heat the refrigerant flowing from the first refrigerant branch to the intake port.

[0009] According to the thermal management system of the present application, a heat recovery device is set between the first refrigerant branch and the air intake of the compressor to heat up and vaporize the liquid refrigerant, thereby avoiding the problem of liquid shock to the compressor due to excessive liquid refrigerant, thereby avoiding damage to the compressor.

[0010] The vehicle according to the present application includes the thermal management system described in any one of the above embodiments.

[0011] The vehicle according to the present application is provided with the thermal management system of the above embodiment, so the vehicle operates more reliably.

[0012] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG1 is a flow diagram of a thermal management system according to some embodiments of the present application.

[0014] FIG2 is a flow diagram of a thermal management system according to some embodiments of the present application.

[0015] FIG3 is a flow diagram of a thermal management system according to other embodiments of the present application.

[0016] FIG4 is a flow diagram of a thermal management system according to other embodiments of the present application.

[0017] FIG5 is a flow diagram of a thermal management system according to other embodiments of the present application.

[0018] FIG6 is a flow diagram of a thermal management system according to other embodiments of the present application.

[0019] FIG7 is a flow diagram of a thermal management system according to other embodiments of the present application.

[0020] FIG8 is a flow diagram of a thermal management system according to other embodiments of the present application.

[0021] FIG9 is a schematic structural diagram of a heat recovery device according to some embodiments of the present application.

[0022] FIG10 is a schematic diagram of a vehicle structure according to some embodiments of the present application.

[0023] Reference numerals:

[0024] 1000. Vehicle;

[0025] 100. Thermal management system; 200. Storage box;

[0026] 10. Storage box heat exchange system; 11. Energy storage component; 12a. First refrigerant branch; 13. Second heat exchanger; 14. Sterilization module; 15. Fan;

[0027] 20. Battery pack heat exchange system; 21. Heat exchange element; 22. Fourth electronic expansion valve; 23. Third temperature sensor; 24. Third pressure and temperature sensor;

[0028] 30. Cabin heat exchange system; 31. Compressor; 31a. Air intake; 31b. Air exhaust; 32a. First heat exchange branch; 33. First heat exchanger; 34. In-cabin condenser; 35. In-cabin evaporator;

[0029] 40. Heat recovery device; 41. Bypass pipe; 42. Connecting pipe; 43. Gas-liquid separator; 43a. Liquid inlet; 43b. Gas outlet; 44. Second heating element;

[0030] 50a, coolant circuit; 51, third heat exchanger; 52, electronic control module;

[0031] 61. First pressure sensor; 62. First temperature sensor; 63. Second temperature sensor; 64. First pressure and temperature sensor; 65. Second pressure and temperature sensor;

[0032] 71, first solenoid valve; 72, second solenoid valve; 73, third solenoid valve; 74, fourth solenoid valve;

[0033] 81. First one-way valve; 82. Second one-way valve; 83. Third one-way valve; 84. Fourth one-way valve;

[0034] 91. First electronic expansion valve; 92. First throttle valve; 93. Second electronic expansion valve; 94. Third electronic expansion valve; 95. Second throttle valve. DETAILED DESCRIPTION

[0035] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0036] A thermal management system 100 for a vehicle according to an embodiment of the present application will be described below with reference to FIG. 1 to FIG. 10 .

[0037] As shown in FIG10 , the thermal management system 100 according to the present application is used in a vehicle 1000 having a storage box 200. As shown in FIG1-8 , the thermal management system 100 includes an air conditioning subsystem, a first refrigerant branch 12a, and a heat recovery device 40. The air conditioning subsystem includes a compressor 31 and a first heat exchange branch 32a, which is connected to the exhaust port 31b and the intake port 31a of the compressor 31, respectively, and is used to adjust the vehicle cabin temperature. The first refrigerant branch 12a is connected to the exhaust port 31b and the intake port 31a, respectively, and is used to adjust the temperature within the storage box 200. The heat recovery device 40 is connected to the first refrigerant branch 12a and the intake port 31a, respectively, and is configured to at least heat the refrigerant flowing from the first refrigerant branch 12a to the intake port 31a.

[0038] In some embodiments, vehicle 1000 includes at least a storage box 200 and a thermal management system 100. Storage box 200 can heat, cool, or maintain the temperature of items placed within it. Storage box 200 can be an onboard refrigerator for storing food or drinks. A first refrigerant branch 12a regulates the temperature within storage box 200 to preserve the freshness of the food within. Thermal management system 100 comprises at least an air conditioning subsystem, a first refrigerant branch 12a, and a heat recovery device 40. The air conditioning subsystem's first heat exchange branch 32a can communicate with a heat exchange structure within the vehicle cabin, allowing thermal management system 100 to adjust the cabin temperature. Compressor 31 has an intake port 31a and an exhaust port 31b. Refrigerant from compressor 31 is typically discharged through exhaust port 31b. The refrigerant then flows through the heat exchange structure within thermal management system 100 and returns to compressor 31 through intake port 31a, thereby regulating the cabin temperature through the air conditioning subsystem. The first refrigerant branch 12a is connected to the exhaust port 31b and the intake port 31a of the compressor 31 respectively, so that the refrigerant discharged from the exhaust port 31b of the compressor 31 can flow through the first refrigerant branch 12a, so that the first refrigerant branch 12a can adjust the temperature in the storage box 200.

[0039] In some embodiments, the heat recovery device 40 of the thermal management system 100 is respectively connected to the first refrigerant branch 12a and the air intake 31a of the compressor 31. At this time, the heat recovery device 40 is arranged upstream of the air intake 31a of the compressor 31. The heat recovery device 40 can heat the refrigerant to vaporize the liquid refrigerant. When the temperature of the liquid refrigerant flowing in the first refrigerant branch 12a is low, the liquid refrigerant is heated by the heat recovery device 40 to heat and vaporize the refrigerant. By heating the liquid refrigerant to change the refrigerant from liquid to gas, the compressor 31 can be prevented from being liquid-hammered by the liquid refrigerant, and the occurrence of liquid-hammering problems can be avoided, thereby preventing damage to the compressor 31.

[0040] According to the thermal management system 100 of the present application, a heat recovery device 40 is provided between the first refrigerant branch 12a and the air intake 31a of the compressor 31 to heat up and vaporize the liquid refrigerant, thereby avoiding the problem of liquid hammering the compressor 31 due to excessive liquid refrigerant, thereby avoiding damage to the compressor 31.

[0041] In some embodiments, the heat recovery device 40 can be a coaxial tube heat regenerator or a gas-liquid separator with a heating function, which is not limited here.

[0042] In some embodiments, an in-vehicle condenser 34 or an in-vehicle evaporator 35 may be provided in the first heat exchange branch 32 a to perform heat exchange with the air in the vehicle cabin, thereby adjusting the temperature of the vehicle cabin.

[0043] According to some embodiments of the present application, as shown in Figures 1-8, the thermal management system 100 further includes a first heat exchanger 33, which is connected to the exhaust port 31b and the first end of the first refrigerant branch 12a, respectively. The heat recovery device 40 includes a first heater and a connecting pipe 42. The first heater is used to heat the connecting pipe 42, which is connected between the second end of the first refrigerant branch 12a and the intake port 31a. In some embodiments, the first heat exchanger 33 can be located outside the vehicle 1000 and can be an external condenser. The refrigerant flows through the first heat exchanger 33 and enters the first refrigerant branch 12a. The refrigerant exchanges heat with the air in the storage box 200 in the first refrigerant branch 12a. The refrigerant then flows from the first refrigerant branch 12a into the connecting pipe 42. Here, the first heater heats the connecting pipe 42, thereby increasing the temperature of the refrigerant flowing through the connecting pipe 42, thereby vaporizing the liquid refrigerant and preventing the compressor 31 from being hit by the liquid refrigerant.

[0044] According to some embodiments of the present application, as shown in Figures 1 and 2, the first heating element is a bypass line 41 connected to the air intake port 31a and the air exhaust port 31b. The bypass line 41 exchanges heat with the connecting pipe 42 to increase the temperature of the refrigerant in the connecting pipe 42 and vaporize the liquid refrigerant. Designing the first heating element as a bypass line 41 suitable for heat exchange with the connecting pipe 42 can make it easier to implement the method of heating the refrigerant in the connecting pipe 42 by the bypass line 41, and make the piping structure in the thermal management system 100 easy to arrange. Specifically, the bypass line 41 can use the refrigerant discharged from the compressor 31 to exchange heat with the refrigerant circulating in the connecting pipe 42, thereby changing the temperature of the refrigerant in the connecting pipe 42.

[0045] In some embodiments, the first heating element may also be a heating wire or other structure suitable for heating the refrigerant in the connecting pipe 42 .

[0046] According to some embodiments of the present application, as shown in Figures 1 and 2, at least a portion of the bypass line 41 and the connecting pipe 42 are arranged in a sleeve arrangement. At this time, the refrigerant flowing in the above-mentioned at least a portion of the bypass line 41 can surround and cover the outer periphery of the connecting pipe 42, so as to allow the bypass line 41 and the connecting pipe 42 to fully exchange heat, thereby ensuring the heat exchange effect between the bypass line 41 and the connecting pipe 42.

[0047] In some embodiments, at least a portion of the outer surface of the bypass pipe 41 is disposed in contact with the outer surface of the connecting pipe 42 , so that the bypass pipe 41 and the connecting pipe 42 can exchange heat.

[0048] According to some embodiments of the present application, as shown in Figure 9, the heat recovery device 40 includes a gas-liquid separator 43 and a second heating element 44. The gas-liquid separator 43 has a liquid inlet 43a and an air outlet 43b. The liquid inlet 43a is connected to the first refrigerant branch 12a, and the air outlet 43b is connected to the air intake 31a; the second heating element 44 is arranged in the gas-liquid separator 43 and is used to heat the gas-liquid separator 43. The gas-liquid separator 43 is respectively connected to the first refrigerant branch 12a and the air intake 31a of the compressor 31. In some embodiments, the second heating element 44 can be arranged inside the gas-liquid separator 43 or outside the gas-liquid separator 43 to heat the refrigerant flowing through the gas-liquid separator 43, or the second heating element 44 and the gas-liquid separator 43 are two independent structures. The second heating element 44 can heat the refrigerant before the refrigerant flows into the gas-liquid separator 43 or after the refrigerant flows out of the gas-liquid separator 43.

[0049] In some embodiments, the heat recovery device 40 may include a first heating element, a connecting pipe 42, a gas-liquid separator 43 and a second heating element 44, wherein the first heating element and the connecting pipe 42 can preliminarily heat the refrigerant flowing out of the first refrigerant branch 12a, and the gas-liquid separator 43 and the second heating element 44 can be arranged downstream of the connecting pipe 42 to heat the refrigerant again to ensure the heating effect of the heat recovery device 40 on the refrigerant, further heat the unvaporized liquid refrigerant to make it fully vaporized, and avoid the compressor 31 being liquid-hammered by the liquid refrigerant.

[0050] According to some embodiments of the present application, as shown in Figure 9, the second heating element 44 is a heating film arranged on the inner wall of the gas-liquid separator 43. In some embodiments, the heating film is arranged around the inner wall of the gas-liquid separator 43 to be suitable for increasing the temperature of the refrigerant flowing to the compressor 31.

[0051] In some embodiments, the second heating element 44 may also be a heating wire or a coaxial tube heat radiation structure.

[0052] According to some embodiments of the present application, as shown in Figures 1 to 8, the thermal management system 100 also includes a second heat exchanger 13, which is connected in series with the first refrigerant branch 12a and is suitable for adjusting the temperature in the storage box 200. The second heat exchanger 13 is suitable for exchanging heat between the storage box 200 and the first refrigerant branch 12a, thereby utilizing the thermal management system 100 in the vehicle to achieve control of the temperature of the storage box 200.

[0053] According to some embodiments of the present application, as shown in Figures 1-8, the thermal management system further includes an energy storage element 11, which is disposed in a first refrigerant branch 12a. The first refrigerant branch 12a provides energy to the energy storage element 11, and the energy storage element 11 is configured to store and release energy for regulating the temperature within the storage box 200. Specifically, the first refrigerant branch 12a can exchange heat with the energy storage element 11 to provide energy to the energy storage element 11, enabling the energy storage element 11 to recover and store the cold energy of the first refrigerant branch 12a. When the compressor 31 is not operating, the energy storage element 11 can release the stored energy to keep the storage box 200 warm, thereby reducing the frequent activation of the compressor 31, thereby reducing the energy consumption of the entire vehicle and improving the vehicle's range.

[0054] According to some embodiments of the present application, as shown in Figures 1 to 8, the first refrigerant branch 12a is passed through the energy storage component 11, and the first refrigerant branch 12a can be integrated into the energy storage component 11, reducing the design of external pipelines, which is conducive to improving the integrated design and reducing the volume, and the energy storage component 11 can also play a certain protective role for the first refrigerant branch 12a. At the same time, the first refrigerant branch 12a passing through the energy storage component 11 can also increase the contact area between the first refrigerant branch 12a and the energy storage component 11, so as to increase the heat exchange area between the two, thereby enabling the two to fully exchange heat, so as to improve the heat exchange efficiency of the two, that is, to improve the efficiency of energy storage component 11 in storing energy.

[0055] According to some embodiments of the present application, as shown in Figures 1 to 8, the thermal management system 100 also includes a sterilization module 14. The sterilization module 14 is used to sterilize at least the energy storage component 11. The sterilization module 14 can also disinfect and sterilize the storage box 200 to prevent the storage box 200 from breeding bacteria and becoming moldy, resulting in odor and affecting food safety.

[0056] In some embodiments, the sterilization module 14 is configured as an ultraviolet sterilization lamp, which is located outside the storage box 200 and is suitable for irradiating light into the storage box 200 for sterilization and disinfection.

[0057] According to some embodiments of the present application, as shown in Figures 1 to 8, the thermal management system 100 also includes a heat exchange element 21, which is suitable for heat exchange with the battery pack. The heat exchange element 21 is connected in parallel with the first refrigerant branch 12a. By providing the heat exchange element 21, the thermal management system 100 is enabled to regulate the temperature of the battery pack, and partial structures within the thermal management system 100 are used to achieve thermal management of the battery. At the same time, the heat exchange element 21 is connected in parallel with the first refrigerant branch 12a, which can reduce the difficulty of arranging the heat exchange element 21.

[0058] In some embodiments, the heat exchange element 21 can be constructed as a battery pack cold plate, which is integrated inside the battery pack and is suitable for heating or cooling the battery pack. Connecting the heat exchange element 21 in parallel with the first refrigerant branch 12a can integrate the battery pack cold plate into the thermal management system 100, so that the battery pack cold plate can utilize structures such as the compressor 31 in the thermal management system 100 to achieve heat exchange with the battery.

[0059] In some embodiments of the present application, multiple heat exchange elements 21 are connected in parallel. The number of heat exchange elements 21 can be selected based on actual needs. By providing multiple heat exchange elements 21 connected in parallel, the difficulty of setting up multiple first heat exchange elements 21 is reduced. Multiple heat exchange elements 21 connected in parallel can be used to exchange heat with multiple batteries, improving the heat exchange efficiency between the thermal management system 100 and the batteries. Furthermore, when cooling the battery pack, the liquid refrigerant flowing out of the heat exchange element 21 can also be heated by the heat recovery device 40, effectively avoiding the risk of liquid hammer in the compressor 31.

[0060] In some embodiments of the present application, as shown in Figures 1 to 8, the thermal management system 100 also includes a third heat exchanger 51, which is respectively connected to the first end of the first refrigerant branch 12a and the exhaust port 31b, and the second end of the first refrigerant branch 12a is connected to the intake port 31a; the thermal management system 100 also includes a coolant circuit 50a for dissipating heat to the electronic control module 52, and the third heat exchanger 51 is arranged in the coolant circuit 50a so that the coolant and refrigerant in the coolant circuit 50a exchange heat, and the third heat exchanger 51 is suitable for heat exchange with the electronic control module 52 to realize heat dissipation or heating of the electronic control module 52 by the thermal management system 100.

[0061] In some embodiments of the present application, as shown in Figures 1 to 8, the vehicle's thermal management system 100 is composed of multiple heat exchange systems, such as a storage box heat exchange system 10, a battery pack heat exchange system 20, a cabin heat exchange system 30, etc., and multiple subsystems share the compressor 31 in the cabin heat exchange system 30, that is, multiple heat exchange systems share the compressor 31 of the air-conditioning subsystem. The cabin heat exchange system 30 has a first heat exchange branch 32a, on which an in-car condenser 34 and an in-car evaporator 35 located inside the cabin are provided. The refrigerant discharged from the exhaust port 31b of the compressor 31 can flow through the first heat exchange branch 32a, or can flow through the first refrigerant branch 12a. The refrigerant flowing through the first refrigerant branch 12a can cause the first refrigerant branch 12a to exchange heat with the energy storage component 11 to provide energy to the energy storage component 11, so that the energy storage component 11 can recover and store the coldness of the first refrigerant branch 12a. The energy storage component 11 can optionally release the stored energy to achieve insulation of the storage box 200. The first refrigerant branch 12a can be applied to the storage box heat exchange system 10, and the heat exchange component 21 in the battery pack heat exchange system 20 can be connected in parallel with the first refrigerant branch 12a. The thermal management system 100 is also provided with structural components such as a throttle valve, a solenoid valve, a one-way valve, a two-way electronic expansion valve, a temperature sensor, a pressure sensor, a temperature and pressure sensor, etc. These structural components deliver the refrigerant to any heat exchange system that needs to adjust the temperature to achieve temperature control of the heat exchange system.

[0062] In order to prevent the refrigerant from hitting the compressor 31 after being converted into liquid form during heat exchange, a heat recovery device 40 is provided between the first refrigerant branch 12a and the air intake port 31a. The heat recovery device 40 can be a heating film provided on the gas-liquid separator 43 to increase the temperature of the refrigerant entering the compressor 31; the heat recovery device 40 can also be a bypass pipe 41 connected to the air intake port 31a and the exhaust port 31b and a connecting pipe 42 provided between the first refrigerant branch 12a and the air intake port 31a, and at least a portion of the bypass pipe 41 and the connecting pipe 42 are arranged in a sleeve manner. At this time, the refrigerant flowing in at least a portion of the bypass pipe 41 surrounds and covers the outer periphery of the connecting pipe 42, so as to fully exchange heat between the bypass pipe 41 and the connecting pipe 42, thereby ensuring the heat exchange effect between the bypass pipe 41 and the connecting pipe 42; the heat recovery device 40 can also be a combination of the above two methods, which will not be repeated here.

[0063] When the heat recovery device 40 is configured as a heating film disposed on the gas-liquid separator 43 , the operation of the thermal management system 100 can be described through the following embodiments:

[0064] As shown in FIG3 , when only the storage box heat exchange system 10 is cooling and keeping warm, the refrigerant flows as follows: compressor 31 → first pressure sensor 61 → first temperature sensor 62 → first solenoid valve 71 → first heat exchanger 33 → first one-way valve 81 → second one-way valve 82 → first electronic expansion valve 91 → second temperature sensor 63 → energy storage element 11 → second heat exchanger 13 → first pressure and temperature sensor 64 → second solenoid valve 72 → third one-way valve 83 → gas-liquid separator 43 → compressor 31.

[0065] In this circulation loop, the high-temperature, high-pressure gaseous refrigerant generated by compressor 31 passes through first heat exchanger 33, also known as the exterior condenser, and undergoes heat exchange with the cold air outside the vehicle, becoming a medium-temperature, medium-pressure liquid refrigerant. This medium-temperature, medium-pressure liquid refrigerant then expands through first electronic expansion valve 91, becoming a low-temperature, low-pressure liquid refrigerant. This low-temperature, low-pressure liquid refrigerant then flows through energy storage element 11, where its cooling energy is absorbed. It then flows through second heat exchanger 13, also known as the evaporator of storage compartment heat exchange system 10, and undergoes heat exchange with the hot air in storage compartment 200, thereby achieving cooling of storage compartment heat exchange system 10. When energy storage element 11 is fully cooled, compressor 31 stops operating, releasing cooling energy through energy storage element 11. Fan 15, located within storage compartment 200, is turned on to allow air to flow, thereby satisfying the cooling and heat preservation requirements of storage compartment heat exchange system 10.

[0066] As shown in FIG4 , when only the storage box heat exchange system 10 is heating and keeping warm, the refrigerant flows as follows: compressor 31 → first pressure sensor 61 → first temperature sensor 62 → third solenoid valve 73 → first pressure and temperature sensor 64 → second heat exchanger 13 → energy storage element 11 → second temperature sensor 63 → first electronic expansion valve 91 → fourth one-way valve 84 → third heat exchanger 51 → fourth solenoid valve 74 → gas-liquid separator 43 → compressor 31 .

[0067] In this circulation loop, the high-temperature and high-pressure gaseous refrigerant generated by the compressor 31 flows through the second heat exchanger 13 and exchanges heat with the cold air of the storage box heat exchange system 10, thereby heating the storage box 200. The refrigerant then flows through the energy storage component 11, and the energy storage component 11 absorbs excess heat. When the energy storage component 11 has completed energy storage, the compressor 31 can stop working, and the energy storage component 11 provides a heat source for insulation.

[0068] As shown in Figure 5, when the cabin heat exchange system 30 is cooling, the refrigerant flows as follows: compressor 31 → first pressure sensor 61 → first temperature sensor 62 → first solenoid valve 71 → first heat exchanger 33 → first one-way valve 81 → second electronic expansion valve 93 → in-vehicle evaporator 35 → second pressure and temperature sensor 65 → gas-liquid separator 5 → compressor 31.

[0069] In this circulation loop, the high-temperature, high-pressure gaseous refrigerant generated by compressor 31 exchanges heat with the cold air outside the vehicle through first heat exchanger 33, becoming a medium-temperature, medium-pressure liquid refrigerant. This medium-temperature, medium-pressure liquid refrigerant then expands through second electronic expansion valve 93 to become a low-temperature, low-pressure liquid refrigerant. This low-temperature, low-pressure liquid refrigerant then flows through evaporator 35 inside the vehicle, exchanging heat with the hot air inside the cabin, thereby cooling the vehicle cabin.

[0070] As shown in FIG6 , when the cabin heat exchange system 30 is heating, the refrigerant flows as follows: compressor 31 → first pressure sensor 61 → first temperature sensor 62 → in-vehicle condenser 34 → third electronic expansion valve 94 → third heat exchanger 51 → fourth solenoid valve 74 → gas-liquid separator 43 → compressor 31 .

[0071] In this circulation loop, the high-temperature and high-pressure gaseous refrigerant generated by the compressor 31 passes through the in-vehicle condenser 34 to exchange heat with the cold air in the vehicle cabin, thereby achieving cabin heating.

[0072] As shown in Figure 7, when the battery pack heat exchange system 20 is cooled, the refrigerant flows in the following direction: compressor 31 → first pressure sensor 61 → first temperature sensor 62 → first solenoid valve 71 → first heat exchanger 33 → first one-way valve 81 → second one-way valve 82 → fourth electronic expansion valve 22 → third temperature sensor 23 → heat exchange element 21 → third pressure and temperature sensor 24 → second solenoid valve 72 → third one-way valve 83 → gas-liquid separator 43 → compressor 31.

[0073] In this circulation loop, the high-temperature, high-pressure gaseous refrigerant produced by compressor 31 exchanges heat with the cold air outside the vehicle through first heat exchanger 33, becoming a medium-temperature, medium-pressure liquid refrigerant. This medium-temperature, medium-pressure liquid refrigerant is then expanded by fourth electronic expansion valve 22 to become a low-temperature, low-pressure liquid refrigerant. This low-temperature, low-pressure liquid refrigerant then flows through heat exchanger 21 and exchanges heat with the battery pack, thereby cooling the batteries.

[0074] As shown in Figure 8, when the battery pack heat exchange system 20 is heated, the refrigerant flows in the following direction: compressor 31 → first pressure sensor 61 → first temperature sensor 62 → third solenoid valve 73 → second throttle valve 95 → third pressure and temperature sensor 24 → heat exchange element 21 → third temperature sensor 23 → fourth electronic expansion valve 22 → fourth one-way valve 84 → third heat exchanger 51 → fourth solenoid valve 74 → gas-liquid separator 43 → compressor 31.

[0075] In this circulation loop, when the high-temperature and high-pressure gaseous refrigerant generated by the compressor 31 flows through the heat exchange element 21, the refrigerant exchanges heat with the low-temperature battery pack, thereby heating the battery pack.

[0076] The above six working conditions can be used in any combination, and some combined working conditions can add refrigerant multi-way valve control.

[0077] When the heat recovery device 40 includes a bypass pipe 41 and a connecting pipe 42, the operation of the thermal management system 100 can be described through the following embodiments:

[0078] As shown in FIG1 , when only the storage box heat exchange system 10 is cooling and heat-insulating, the refrigerant flows as follows: compressor 31 → first pressure sensor 61 → first temperature sensor 62 → first solenoid valve 71 → first heat exchanger 33 → first check valve 81 → second check valve 82 → first electronic expansion valve 91 → second temperature sensor 63 → energy storage element 11 → second heat exchanger 13 → first pressure and temperature sensor 64 → flows through the low-temperature connecting pipe 42 into the high-temperature bypass pipe 41 (at which point the first throttle valve 92 is open). After heat exchange, the refrigerants in the two pipes flow out and merge → second solenoid valve 72 → third check valve 83 → gas-liquid separator 43 → compressor 31.

[0079] In this circulation loop, the high-temperature, high-pressure gaseous refrigerant generated by compressor 31 passes through first heat exchanger 33, also known as the exterior condenser, and undergoes heat exchange with the cold air outside the vehicle, becoming a medium-temperature, medium-pressure liquid refrigerant. This medium-temperature, medium-pressure liquid refrigerant then expands through first electronic expansion valve 91, becoming a low-temperature, low-pressure liquid refrigerant. This low-temperature, low-pressure liquid refrigerant then flows through energy storage element 11, where its cooling energy is absorbed. It then flows through second heat exchanger 13, also known as the evaporator of storage compartment heat exchange system 10, and undergoes heat exchange with the hot air in storage compartment 200, thereby achieving cooling of storage compartment heat exchange system 10. When energy storage element 11 is fully cooled, compressor 31 stops operating, releasing cooling energy through energy storage element 11. Fan 15, located within storage compartment 200, is turned on to allow air to flow, thereby satisfying the cooling and heat preservation requirements of storage compartment heat exchange system 10.

[0080] As shown in FIG2 , when only the storage box heat exchange system 10 is heating and insulating, the refrigerant flows as follows: compressor 31 → first pressure sensor 61 → first temperature sensor 62 → third solenoid valve 73 → first pressure and temperature sensor 64 → outflow from the low-temperature connecting pipe 42 (first throttle valve 92 is closed at this time) → second heat exchanger 13 → energy storage element 11 → second temperature sensor 63 → first electronic expansion valve 91 → fourth one-way valve 84 → third heat exchanger 51 → fourth solenoid valve 74 → gas-liquid separator 43 → compressor 31.

[0081] In this circulation loop, the high-temperature and high-pressure gaseous refrigerant generated by the compressor 31 flows through the second heat exchanger 13 and exchanges heat with the cold air of the storage box heat exchange system 10, thereby heating the storage box 200. The refrigerant then flows through the energy storage component 11, and the energy storage component 11 absorbs excess heat. When the energy storage component 11 has completed energy storage, the compressor 31 can stop working, and the energy storage component 11 provides a heat source for insulation.

[0082] The following briefly describes the vehicle 1000 according to the present application.

[0083] As shown in FIG10 , the vehicle 1000 according to the present application includes the thermal management system 100 described in any one of the above embodiments. Since the vehicle 1000 according to the present application is provided with the thermal management system 100 of the above embodiments, the vehicle 1000 operates more reliably.

[0084] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0085] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A thermal management system (100) for a vehicle, characterized in that: The vehicle has a storage box (200), and the thermal management system (100) comprises: An air conditioning subsystem, the air conditioning subsystem comprising a compressor (31) and a first heat exchange branch (32a), the first heat exchange branch (32a) being respectively connected to an exhaust port (31b) and an air intake port (31a) of the compressor (31), the first heat exchange branch (32a) being used to adjust a vehicle cabin temperature; A first refrigerant branch (12a), the first refrigerant branch (12a) being respectively connected to the exhaust port (31b) and the intake port (31a) and being suitable for adjusting the temperature in the storage box (200); A heat recovery device (40), wherein the heat recovery device (40) is respectively connected to the first refrigerant branch (12a) and the air intake port (31a), and the heat recovery device (40) is configured to at least heat the refrigerant flowing from the first refrigerant branch (12a) to the air intake port (31a).

2. The thermal management system (100) for a vehicle according to claim 1, characterized in that: It also includes a first heat exchanger (33), wherein the first heat exchanger (33) is respectively connected to the exhaust port (31b) and the first end of the first refrigerant branch (12a); The heat recovery device (40) comprises a first heating element and a connecting pipe (42), wherein the first heating element is used to heat the connecting pipe (42), and the connecting pipe (42) is connected between the second end of the first refrigerant branch (12a) and the air intake port (31a).

3. The thermal management system (100) for a vehicle according to claim 2, characterized in that: The first heating element is a bypass pipeline (41) connected to the air intake port (31a) and the air exhaust port (31b).

4. The thermal management system (100) for a vehicle according to claim 3, characterized in that: At least a portion of the bypass pipeline (41) and the connecting pipe (42) are sleeved together.

5. The thermal management system (100) of a vehicle according to any one of claims 1 to 4, characterized in that: The heat recovery device (40) comprises: A gas-liquid separator (43), the gas-liquid separator (43) having a liquid inlet (43a) and a gas outlet (43b), the liquid inlet (43a) being connected to the first refrigerant branch (12a), and the gas outlet (43b) being connected to the air intake port (31a); A second heating element (44), the second heating element (44) is arranged on the gas-liquid separator (43) and is used to heat the gas-liquid separator (43).

6. The thermal management system (100) for a vehicle according to claim 5, characterized in that: The second heating element (44) is a heating film arranged on the inner wall of the gas-liquid separator (43).

7. The thermal management system (100) of a vehicle according to any one of claims 1 to 6, characterized in that: It also includes a second heat exchanger (13), which is connected in series with the first refrigerant branch (12a) and is suitable for adjusting the temperature in the storage box (200).

8. The thermal management system (100) for a vehicle according to any one of claims 1 to 7, characterized in that: It also includes an energy storage component (11), which is arranged in a first refrigerant branch (12a), the first refrigerant branch (12a) provides energy for the energy storage component (11), and the energy storage component (11) is configured to store and release energy for regulating the temperature in the storage box (200).

9. The thermal management system (100) for a vehicle according to claim 8, characterized in that: The first refrigerant branch (12a) is arranged through the energy storage component (11).

10. The thermal management system (100) of a vehicle according to claim 8 or 9, characterized in that: It also comprises a sterilization module (14), wherein the sterilization module (14) is at least used to sterilize the energy storage component (11).

11. The thermal management system (100) of a vehicle according to any one of claims 1 to 10, characterized in that: Also includes: A heat exchange component (21), the heat exchange component (21) being suitable for performing heat exchange with the battery pack, the heat exchange component (21) being connected in parallel with the first refrigerant branch (12a); a third heat exchanger (51), the third heat exchanger (51) being connected to the first end of the first refrigerant branch (12a) and the exhaust port (31b) respectively, and the second end of the first refrigerant branch (12a) being connected to the intake port (31a); A cooling liquid circuit (50a) is used to dissipate heat from an electric control module (52); the third heat exchanger (51) is arranged in the cooling liquid circuit (50a) to enable the cooling liquid and the refrigerant in the cooling liquid circuit (50a) to exchange heat.

12. A vehicle, characterized in that: The thermal management system (100) comprises the thermal management system (100) according to any one of claims 1-11.

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