Heat management system for vehicle and vehicle

Abstract

The invention relates to a heat management system for a vehicle and the vehicle. The heat management system for the vehicle comprises a refrigerant circulation device, wherein the refrigerant circulation device comprises a first refrigerant circulation flow path and a second refrigerant circulation flow path; wherein the first three-way valve is used for switching an outlet of the compressor to communicate with the first in-vehicle heat exchanger and the heat exchange device or communicate with the out-vehicle heat exchanger, and the second three-way valve is used for switching an inlet of the compressor to communicate with the out-vehicle heat exchanger or communicate with the first in-vehicle heat exchanger and the heat exchange device; the flow direction of the first refrigerant circulating flow path and the flow direction of the second refrigerant circulating flow path are changed; the first switch valve is arranged on a communicating pipeline between the first three-way valve and the first in-vehicle heat exchanger and used for opening and closing a first refrigerant circulating flow path; and the fifth switch valve is arranged on a communicating pipeline between the first three-way valve and the heat exchange device and is used for opening and closing the second refrigerant circulating flow path. According to the invention, more different heat management schemes can be realized, the multi-scene requirements are met, and the adaptability is higher.

Description

Technical Field

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

[0002] Electric vehicles are rapidly developing across passenger cars, commercial vehicles, and specialty vehicles, finding widespread application across various industries. Thermal management of various components significantly impacts vehicle reliability, ride comfort, and range. The battery assembly and passenger compartment, in particular, have varying cooling and heating requirements depending on the vehicle's operating conditions and ambient temperatures.

[0003] Currently, technicians use multi-way valves (excluding three-way valves) in various integrated thermal management systems to control the heat of thermal management objects such as batteries, electric drives, and passenger compartments. This results in complex structures. To adapt the integrated thermal management system to a wider range of different thermal demand combinations for each thermal management object, a thermal management system with flexible and variable cooling and heating control for each thermal management object is needed. Summary of the Invention

[0004] In view of this, the present invention provides a vehicle thermal management system and a vehicle, which can implement more different thermal management solutions without using a multi-way valve (excluding a three-way valve), meet the needs of multiple scenarios, and have stronger adaptability.

[0005] To achieve the above objectives, the present invention mainly provides the following technical solutions:

[0006] In a first aspect, an embodiment of the present invention provides a vehicle thermal management system, comprising: a refrigerant circulation device, comprising a compressor, a first in-vehicle heat exchanger, a heat exchange device, an out-vehicle heat exchanger, a first throttle valve, a third throttle valve, a fourth throttle valve, a first three-way valve, a second three-way valve, a first switch valve, and a fifth switch valve, wherein the compressor, the first in-vehicle heat exchanger, the first throttle valve, the third throttle valve, and the out-vehicle heat exchanger are connected in series to form a first refrigerant circulation flow path, and the compressor, the heat exchange device, the fourth throttle valve, the flash gas, the third throttle valve, and the out-vehicle heat exchanger are connected in series to form a second refrigerant circulation flow path; wherein the first three-way valve is used to The outlet of the compressor is switched to be connected with the first in-vehicle heat exchanger, the heat exchange device or to be connected with the outside-vehicle heat exchanger. The second three-way valve is used to switch the inlet of the compressor to be connected with the outside-vehicle heat exchanger or to be connected with the first in-vehicle heat exchanger and the heat exchange device, so as to change the flow direction of the first refrigerant circulation path and the second refrigerant circulation path; the first switch valve is arranged on the connecting pipeline between the first three-way valve and the first in-vehicle heat exchanger, and is used to open and close the first refrigerant circulation path; the fifth switch valve is arranged on the connecting pipeline between the first three-way valve and the heat exchange device, and is used to open and close the second refrigerant circulation path.

[0007] In some embodiments, the refrigerant circulation device also includes flash gas and an oil-liquid separator, one end of the flash gas is connected to the first throttle valve and the fourth throttle valve, and the other end is connected to the third throttle valve, and the oil-liquid separator is connected in series between the second three-way valve and the inlet of the compressor.

[0008] In some embodiments, when the first switch valve is opened, the first three-way valve switches the outlet of the compressor to connect with the first in-vehicle heat exchanger, and the second three-way valve switches the inlet of the compressor to connect with the outside-vehicle heat exchanger, the first in-vehicle heat exchanger generates heat for in-vehicle air conditioning heating; and / or, when the fifth switch valve is opened, the first three-way valve switches the outlet of the compressor to connect with the heat exchange device, and the second three-way valve switches the inlet of the compressor to connect with the outside-vehicle heat exchanger, the heat exchange device generates heat for heating the battery.

[0009] In some embodiments, when the first switch valve is opened, the first three-way valve switches the outlet of the compressor to connect with the external heat exchanger, and the second three-way valve switches the inlet of the compressor to connect with the first internal heat exchanger, the first internal heat exchanger is cooled for in-vehicle air conditioning cooling; and / or, when the fifth switch valve is opened, the first three-way valve switches the outlet of the compressor to connect with the external heat exchanger, and the second three-way valve switches the inlet of the compressor to connect with the heat exchange device, the heat exchange device is cooled for cooling the battery.

[0010] In some embodiments, the refrigerant circulation device also includes a second in-vehicle heat exchanger, a second throttle valve, a second switch valve and a third switch valve. The compressor, the second in-vehicle heat exchanger, the second throttle valve, the flash gas, the first throttle valve, the first in-vehicle heat exchanger, and the oil-liquid separator are connected in series to form a third refrigerant circulation flow path; the first three-way valve is also used to switch the outlet of the compressor to the second in-vehicle heat exchanger. The second switch valve is arranged on the connecting pipe between the compressor outlet and the second in-vehicle heat exchanger. The third switch valve is arranged on the connecting pipe between the compressor outlet and the outside heat exchanger. The second switch valve is used to open and close the third refrigerant circulation flow path.

[0011] In some embodiments, when the second switching valve is opened, the first three-way valve switches the outlet of the compressor to connect with the second in-vehicle heat exchanger, the first switching valve is opened, and the third switching valve is closed, the first in-vehicle heat exchanger and the second in-vehicle heat exchanger are used for in-vehicle air conditioning dehumidification.

[0012] In some embodiments, the vehicle thermal management system also includes: a liquid cooling circulation device, including a first water pump, a radiator and a seventh switching valve, the first water pump and the radiator are used to be connected in series with the vehicle's electric drive assembly to form a first liquid cooling circulation flow path, and the seventh switching valve is used to open and close the first liquid cooling circulation flow path.

[0013] In some embodiments, the first water pump, the battery, the electric drive assembly and the radiator are connected in series to form a second liquid cooling circulation flow path, a sixth switch valve is provided on the connecting pipe between the outlet of the first water pump and the battery, and an eighth switch valve is provided on the connecting pipe between the battery and the electric drive assembly.

[0014] In some embodiments, the liquid cooling circulation device also includes a second water pump and a ninth switch valve. The second water pump is used to be connected in series with the battery and the heat exchange device to form a third liquid cooling circulation flow path. The ninth switch valve is used to open and close the second liquid cooling circulation flow path.

[0015] In some embodiments, a liquid replenishing pipeline is provided between the flash gas and the compressor, and a fourth switch valve is provided on the liquid replenishing pipeline.

[0016] In a second aspect, an embodiment of the present invention further provides a vehicle, comprising: a vehicle thermal management system as described in any embodiment of the first aspect.

[0017] Beneficial effects:

[0018] (1) By controlling the opening and closing states of the fifth switch valve and the fourth throttle valve, the first switch valve and the first throttle valve, and switching the flow direction of the first refrigerant circulation path and the first refrigerant circulation path by the first three-way valve and the second three-way valve, air conditioning heating, air conditioning cooling, battery heating, battery cooling, air conditioning heating and battery heating at the same time, and air conditioning cooling and battery cooling at the same time can be realized separately without using a multi-way valve (excluding the three-way valve), thereby realizing thermal management of multiple thermal management objects and realizing a variety of thermal management combinations, flexible application in multiple scenarios, and stronger adaptability.

[0019] (2) The opening and closing states of the seventh switch valve are controlled separately and are independent of the refrigerant circulation flow path, without interfering with each other. Therefore, the three functions of air conditioning heating, battery heating, and electric drive cooling are realized not as a coupled combination scheme, but as a decoupled one.

[0020] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of a vehicle thermal management system provided by an embodiment of the present invention;

[0022] Figure 2 Schematic diagram of battery heating and air conditioning heating cycle provided by an embodiment of the present invention;

[0023] Figure 3 is a schematic diagram of an air conditioning heating cycle provided by an embodiment of the present invention;

[0024] Figure 4 is a schematic diagram of a battery heating cycle provided by an embodiment of the present invention;

[0025] Figure 5 is a schematic diagram of a battery cooling and air conditioning refrigeration cycle provided by an embodiment of the present invention;

[0026] Figure 6 is a schematic diagram of an air conditioning refrigeration cycle provided by an embodiment of the present invention;

[0027] Figure 7is a schematic diagram of a battery cooling cycle provided by an embodiment of the present invention;

[0028] Figure 8 is a schematic diagram of a battery cooling and air conditioning heating cycle provided by an embodiment of the present invention;

[0029] Figure 9 is a schematic diagram of an air conditioning and dehumidification cycle provided by an embodiment of the present invention;

[0030] Figure 10 It is a schematic diagram of the battery heat dissipation and electric drive assembly heat dissipation cycle provided by an embodiment of the present invention.

[0031] Reference numerals:

[0032] 1-compressor; 2-first three-way valve; 3-second three-way valve; 4-first on-off valve; 5-second on-off valve; 6-third on-off valve; 7-HVAC assembly; 71-first in-vehicle heat exchanger; 72-in-vehicle side fan; 73-second in-vehicle heat exchanger; 8-out-vehicle heat exchange assembly; 81-out-vehicle heat exchanger; 82-radiator; 83-out-vehicle side fan; 9-first throttle valve; 10-second throttle valve; 11-third throttle valve; 12-flash evaporator; 13-electric drive assembly; 14-fourth on-off valve; 15-gas-liquid separator; 16-fourth throttle valve; 17-heat exchange device; 18-fifth on-off valve; 19-first water pump; 20-second water pump; 21-sixth on-off valve; 22-seventh on-off valve; 23-battery; 24-eighth on-off valve; 25-ninth on-off valve. DETAILED DESCRIPTION

[0033] To further illustrate the technical means and effects employed by the present invention to achieve its intended objectives, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention is provided in conjunction with the accompanying drawings and preferred embodiments. In the following description, different references to "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

[0034] Reference Figures 1 to 4 An embodiment of the present invention provides a vehicle thermal management system, including a refrigerant circulation device, which includes a compressor 1, a first in-vehicle heat exchanger 71, a heat exchange device 17, an out-vehicle heat exchanger 81, a first throttle valve 9, a third throttle valve 11, a fourth throttle valve 16, a first three-way valve 2, a second three-way valve 3, a first switch valve 4, and a fifth switch valve 18.

[0035] The compressor 1, the first in-vehicle heat exchanger 71, the first throttle valve 9, the third throttle valve 11, and the external heat exchanger 81 are connected in series to form a first refrigerant circulation path. The compressor 1, the heat exchange device 17, the fourth throttle valve 16, the third throttle valve 11, and the external heat exchanger 81 are connected in series to form a second refrigerant circulation path. The first three-way valve 2 is used to switch the outlet of the compressor 1 between the first in-vehicle heat exchanger 71 and the heat exchange device 17 or the external heat exchanger 81, and the second three-way valve 3 is used to switch the inlet of the compressor 1 between the external heat exchanger 81 or the first in-vehicle heat exchanger 71 and the heat exchange device 17, thereby changing the flow direction of the first and second refrigerant circulation paths. The first on-off valve 4 is provided in the communication line between the first three-way valve 2 and the first in-vehicle heat exchanger 71, and is used to open and close the first refrigerant circulation path. The fifth on-off valve 18 is provided in the communication line between the first three-way valve 2 and the heat exchanger 17, and is used to open and close the second refrigerant circulation path. The heat exchanger 17 is a plate-type heat exchanger.

[0036] The refrigerant circulation device also includes a flash gas 12 and an oil-liquid separator 15. One end of the flash gas 12 is connected to the first throttle valve 9 and the fourth throttle valve 16, and the other end is connected to the third throttle valve 11. The oil-liquid separator 15 is connected in series between the second three-way valve 3 and the inlet of the compressor 1.

[0037] Reference Figure 2 , when the first switch valve 4 is opened, the first three-way valve 2 switches the outlet of the compressor 1 to communicate with the first in-vehicle heat exchanger 71, and the second three-way valve 3 switches the inlet of the compressor 1 to communicate with the outside heat exchanger 81, the refrigerant flow direction in the first refrigerant circulation path is: compressor 1 → first three-way valve 2 → first switch valve 4 → first in-vehicle heat exchanger 71 → first throttle valve 9 → flash evaporator 12 → third throttle valve 11 → outside heat exchanger 81 → third switch valve 6 → second three-way valve 3 → gas-liquid separator 15 → compressor 1, that is, high temperature cooling After being discharged from the compressor 1, the refrigerant exchanges heat with the passenger compartment through the first in-vehicle heat exchanger 71, thereby realizing air-conditioning and heating of the passenger compartment. The refrigerant is throttled for the first time by the first throttle valve 9 and then passes into the flash evaporator 12. Part of the liquid refrigerant evaporates in the flash evaporator 12, causing the liquid refrigerant to cool down again. Then, the liquid refrigerant is throttled for the second time by the third throttle valve 11 and then enters the out-vehicle heat exchanger 81 to evaporate and absorb heat, drawing heat from the environment. Then, the refrigerant passes through the third switch valve 6, the second three-way valve 3, and the gas-liquid separator 15 and returns to the compressor 1, thereby realizing heating in the vehicle.

[0038] When the fifth switch valve 18 is opened, the first three-way valve 2 switches the outlet of the compressor 1 to be connected to the heat exchange device 17, and the second three-way valve 3 switches the inlet of the compressor 1 to be connected to the vehicle-outside heat exchanger 81, the refrigerant flow direction in the second refrigerant circulation path is: compressor 1 → first three-way valve 2 → fifth switch valve 18 → heat exchange device 17 → fourth throttle valve 16 → flash evaporator 12 → third throttle valve 11 → vehicle-outside heat exchanger 81 → third switch valve 6 → second three-way valve 3 → gas-liquid separator 15 → compressor 1, that is, the high-temperature refrigerant flows from the compressor 1 to the vehicle-outside heat exchanger 81. After being discharged from the compressor 1, the heat is exchanged with the battery 23 through the heat exchange device 17 to heat the battery 23. The refrigerant is then throttled by the fourth throttle valve 16 and passed into the flash evaporator 12. Part of the liquid refrigerant evaporates in the flash evaporator 12, causing the liquid refrigerant to cool down again. The liquid refrigerant is then throttled for the second time by the third throttle valve 11 and enters the external heat exchanger 81 to evaporate and absorb heat, drawing heat from the environment. The refrigerant then passes through the third switch valve 6, the second three-way valve 3, and the gas-liquid separator 15 back to the compressor 1 to heat the battery 23.

[0039] Reference Figure 3 When the first switch valve 4 is opened, the first three-way valve 2 switches the outlet of the compressor 1 to connect with the first in-vehicle heat exchanger 71, and the second three-way valve 3 switches the inlet of the compressor 1 to connect with the external heat exchanger 81, the fifth switch valve 18 and the fourth throttle valve 16 can be closed. At this time, only the first in-vehicle heat exchanger 71 is used to exchange heat with the passenger compartment, thereby realizing air conditioning and heating of the passenger compartment.

[0040] Reference Figure 4 When the fifth switch valve 18 is opened, the first three-way valve 2 switches the outlet of the compressor 1 to connect with the heat exchange device 17, and the second three-way valve 3 switches the inlet of the compressor 1 to connect with the external heat exchanger 81, the first switch valve 4 and the first throttle valve 9 can be closed. At this time, the heat exchange device 17 exchanges heat with the battery 23 to achieve heating of the battery 23.

[0041] Reference Figure 2 The first switch valve 4 and the fifth switch valve 18 can be opened at the same time. At this time, the first in-vehicle heat exchanger 71 exchanges heat with the passenger compartment to achieve air conditioning and heating of the passenger compartment. At the same time, the heat exchange device 17 exchanges heat with the battery 23 to achieve heating of the battery 23.

[0042] Reference Figure 5When the first on-off valve 4 is open, the first three-way valve 2 switches the outlet of compressor 1 to communicate with the external heat exchanger 81, and the second three-way valve 3 switches the inlet of compressor 1 to communicate with the first internal heat exchanger 71, the first internal heat exchanger 71 cools the vehicle, providing cooling for the vehicle's air conditioning. The refrigerant in the first refrigerant circulation path flows as follows: compressor 1 → first three-way valve 2 → third on-off valve 6 → external heat exchanger 81 → third throttle valve 11 → flash evaporator 12 → first throttle valve 9 → first internal heat exchanger 71 → first on-off valve 4 → second three-way valve 3 → gas-liquid separator 15 → compressor 1. That is, after the high-temperature refrigerant is discharged from compressor 1, it first exchanges heat with the ambient air through the external heat exchanger 81, cooling the refrigerant. The refrigerant is throttled for the first time by the third throttle valve 11 and then passes into the flash evaporator 12. Part of the liquid refrigerant evaporates in the flash evaporator 12, causing the liquid refrigerant to cool down again. Then, the liquid refrigerant is throttled for the second time by the first throttle valve 9 and then enters the first in-vehicle heat exchanger 71 to evaporate and absorb heat, thereby realizing air conditioning and cooling of the passenger compartment. Then, the refrigerant returns to the compressor 1 through the first switch valve 4, the second three-way valve 3, and the gas-liquid separator 15.

[0043] When the fifth switch valve 18 is opened, the first three-way valve 2 switches the outlet of the compressor 1 to communicate with the external heat exchanger 81, and the second three-way valve 3 switches the inlet of the compressor 1 to communicate with the heat exchange device 17, the heat exchange device 17 is refrigerated to cool the battery. The flow direction of the refrigerant in the second refrigerant circulation path is: compressor 1 → first three-way valve 2 → third switch valve 6 → external heat exchanger 81 → third throttle valve 11 → flash evaporator 12 → fourth throttle valve 16 → heat exchange device 17 → fifth switch valve 18 → second three-way valve 3 → gas-liquid separator 15 → compressor 1, that is, after the high-temperature refrigerant is discharged from the compressor 1, the refrigerant first exchanges heat with the environment through the external heat exchanger 81 to cool the refrigerant. After the first throttling by the third throttle valve 11, the refrigerant enters the flash evaporator 12, and part of the liquid refrigerant evaporates in the flash evaporator 12, causing the liquid refrigerant to cool again. Then, the liquid refrigerant enters the heat exchange device 17 after the second throttling by the fourth throttle valve 16 to evaporate and absorb heat, thereby cooling the battery 23.

[0044] Reference Figure 6 When the first switch valve 4 is opened, the first three-way valve 2 switches the outlet of the compressor 1 to connect with the external heat exchanger 81, and the second three-way valve 3 switches the inlet of the compressor 1 to connect with the first internal heat exchanger 71, the fifth switch valve 18 and the fourth throttle valve 16 can be closed. At this time, only the first internal heat exchanger 71 and the passenger compartment are cooled, realizing air conditioning and cooling of the passenger compartment.

[0045] Reference Figure 7 When the fifth switch valve 18 is opened, the first three-way valve 2 switches the outlet of the compressor 1 to connect with the external heat exchanger 81, and the second three-way valve 3 switches the inlet of the compressor 1 to connect with the heat exchange device 17, the first switch valve 4 and the first throttle valve 9 can be closed. At this time, only the heat exchange device 17 is cooled to cool the battery 23.

[0046] Reference Figure 5 The first switch valve 4 and the fifth switch valve 18 can be opened at the same time. At this time, the first in-vehicle heat exchanger 71 exchanges heat with the passenger compartment to achieve air conditioning and cooling of the passenger compartment. At the same time, the heat exchange device 17 exchanges heat with the battery 23 to achieve cooling of the battery 23.

[0047] By controlling the opening and closing states of the fifth switch valve 18 and the fourth throttle valve 16, the first switch valve 4 and the first throttle valve 9, and switching the flow direction of the first refrigerant circulation flow path and the second three-way valve 3, air conditioning heating, air conditioning cooling, battery heating, battery cooling, air conditioning heating and battery heating at the same time, and air conditioning cooling and battery cooling at the same time can be realized separately, thereby realizing thermal management of multiple thermal management objects and realizing multiple thermal management combinations, flexible application in multiple scenarios, and stronger adaptability.

[0048] In some embodiments, the refrigerant circulation device also includes a second in-vehicle heat exchanger 73, a second throttle valve 10, a second switch valve 5 and a third switch valve 6. The compressor 1, the second in-vehicle heat exchanger 73, the second throttle valve 10, the flash gas 12, the fourth throttle valve 16, the first in-vehicle heat exchanger 71, and the oil-liquid separator 15 are connected in series to form a third refrigerant circulation flow path; the compressor 1, the second in-vehicle heat exchanger 73, the second throttle valve 10, the flash gas 12, the first throttle valve 9, the heat exchange device 17, and the oil-liquid separator 15 are connected in series to form a fourth refrigerant circulation flow path. The first three-way valve 2 is also used to switch the compressor outlet to the second in-vehicle heat exchanger 73 and the heat exchange device 17. The second switch valve 5 is arranged on the connecting pipeline between the compressor outlet and the second in-vehicle heat exchanger 73. The third switch valve 6 is arranged on the connecting pipeline between the compressor outlet and the external heat exchanger 81. The second switch valve 5 is used to open and close the third refrigerant circulation flow path or the fourth refrigerant circulation flow path.

[0049] Reference Figure 8When the second switch valve 5 is opened, the first three-way valve 2 switches the compressor outlet to connect with the second in-vehicle heat exchanger 73, the fifth switch valve 18 is opened, and the first switch valve 4 is closed, the second in-vehicle heat exchanger 73 heats and the heat exchange device 17 cools, thereby heating the in-vehicle air conditioner and cooling the battery 23. The refrigerant flow direction of the fourth refrigerant circulation path is: compressor 1 → first three-way valve 2 → second switch valve 5 → second in-vehicle heat exchanger 73 → second throttle valve 10 → flash evaporator 12 → fourth throttle valve 16 → heat exchange device 17 → fifth switch valve 18 → second three-way valve 3 → gas-liquid separator 15 → compressor 1, that is, after the high-temperature refrigerant is discharged from the compressor 1, the refrigerant exchanges heat with the passenger compartment through the second in-vehicle heat exchanger 73 to achieve air-conditioning and heating of the passenger compartment. After the first throttling by the second throttle valve 10, the refrigerant enters the flash evaporator 12, and part of the liquid refrigerant evaporates in the flash evaporator 12, causing the liquid refrigerant to cool down again. After the second throttle by the fourth throttle valve 16, the liquid refrigerant enters the heat exchange device 17 to evaporate and absorb heat. Then the refrigerant returns to the compressor 1 through the fifth switch valve 18, the second three-way valve 3, and the gas-liquid separator 15 to achieve cooling of the battery 23. For example, the temperature of the coolant on the other side of the heat exchange device 17 decreases after heat exchange with the refrigerant. The cooled coolant is sent to the battery assembly 23 under the action of the second water pump 20 and exchanges heat with it to cool the battery assembly 23.

[0050] Reference Figure 9 When the second switch valve 5 is opened, the first three-way valve 2 switches the outlet of the compressor 1 to connect with the second in-vehicle heat exchanger 73, the first switch valve 4 is opened, and the third switch valve 6 is closed, the first in-vehicle heat exchanger 71 and the second in-vehicle heat exchanger 73 are used for in-vehicle air conditioning dehumidification.

[0051] The refrigerant flow direction of the third refrigerant circulation path is: compressor 1 → first three-way valve 2 → second switch valve 5 → second in-vehicle heat exchanger 73 → second throttle valve 10 → flash evaporator 12 → first throttle valve 9 → first in-vehicle heat exchanger 71 → first switch valve 4 → second three-way valve 3 → gas-liquid separator 15 → compressor 1, that is, after the high-temperature refrigerant is discharged from the compressor 1, the refrigerant is cooled by the second in-vehicle heat exchanger 73, throttled for the first time by the second throttle valve 10, partially evaporated and cooled in the flash evaporator 12, and throttled for the second time by the first throttle valve 9, and then the low-temperature liquid refrigerant enters the first in-vehicle heat exchanger 71 to exchange heat with the air in the vehicle, and then returns to the compressor 1 through the first switch valve 4, the second three-way valve 3, and the gas-liquid separator 15. Under the action of the in-vehicle fan 72, the humid air in the vehicle flows through the first in-vehicle heat exchanger 71 for heat exchange, thereby cooling the air in the passenger compartment and condensing the moisture in the air, and is brought outside the vehicle through the corresponding structure in the HVAC assembly 7. Subsequently, the dry low-temperature air after passing through the first in-vehicle heat exchanger 71 is blown to the second in-vehicle heat exchanger 73 filled with high-temperature refrigerant under the action of the in-vehicle fan 72 for heat exchange, so that the temperature of the low-temperature dry air rises.

[0052] In some embodiments, reference Figure 1 The vehicle thermal management system also includes a liquid cooling circulation device, including a first water pump 19, a radiator 82 and a seventh switch valve 22. The first water pump 19 and the radiator 82 are used to be connected in series with the vehicle's electric drive assembly 13 to form a first liquid cooling circulation flow path. The seventh switch valve 22 is used to open and close the first liquid cooling circulation flow path.

[0053] The seventh switch valve 22 is opened, and the coolant in the first liquid cooling circulation path flows as follows: the first water pump 19 → the seventh switch valve 22 → the electric drive assembly 13 → the radiator 82 → the first water pump 19 , thereby cooling the electric drive assembly 13 .

[0054] It's worth noting that the opening and closing states of the seventh on-off valve 22 are independently controlled from the refrigerant circulation path, without interfering with each other. Opening the seventh on-off valve 22 and starting the first water pump 19 activates the electric drive assembly coolant flow path. The coolant is cooled by the radiator 82 and, under the action of the first water pump 19, exchanges heat with the electric drive assembly 13, cooling the electric drive assembly 13.

[0055] In some embodiments, reference Figure 10 The first water pump 19, the battery 23, the electric drive assembly 13 and the radiator 82 are connected in series to form a second liquid cooling circulation path. A sixth switch valve 21 is provided on the connecting pipe between the outlet of the first water pump 19 and the battery 23, and an eighth switch valve 24 is provided on the connecting pipe between the battery 23 and the electric drive assembly 13.

[0056] The ninth switch valve 25 is in the closed state, the compressor 1 and the second water pump 20 are in the shutdown state, the refrigerant circulation flow path stops working, and the coolant in the second liquid cooling circulation flow path flows as follows: the first water pump 19 → the sixth switch valve 21 → the battery assembly 23 → the eighth switch valve 24 → the electric drive assembly 13 → the radiator 82 → the first water pump 19. When the coolant passes through the radiator 82, it exchanges heat with the ambient air under the action of the fan 83 outside the vehicle for cooling. Then, under the action of the first water pump 19, it flows through the battery assembly 23 and the electric drive assembly 13 for heat exchange, and finally brings the heat to the radiator 82 and releases it into the ambient air, thereby achieving cooling and heat dissipation of the battery 23 while also achieving heat dissipation of the electric drive assembly 13.

[0057] In some embodiments, reference Figure 1 The liquid cooling circulation device also includes a second water pump 20 and a ninth switch valve 25. The second water pump 20 is used to be connected in series with the battery 23 and the heat exchange device 17 to form a third liquid cooling circulation path. The ninth switch valve 25 is used to open and close the second liquid cooling circulation path.

[0058] When the coolant in the second liquid-cooling circulation path passes through the heat exchange device 17 , it exchanges heat with the refrigerant in the refrigerant circulation path on the other side of the heat exchanger 17 , thereby heating or cooling the battery 23 .

[0059] In some embodiments, reference Figure 1 A liquid replenishing pipeline is provided between the flash gas 12 and the compressor 1 , and a fourth switch valve 14 is provided on the liquid replenishing pipeline.

[0060] The opening and closing states of the fourth switch valve 14 are controlled separately, and are independent of the refrigerant circulation flow path and the liquid cooling circulation flow path, and do not interfere with each other. Opening the fourth switch valve 14 can allow the refrigerant evaporated in the flash evaporator 12 to be re-introduced into the compressor as make-up air, thereby increasing the compressor suction volume and improving the system capacity.

[0061] The above-listed thermal management system operation schemes are the main application functions during the actual use of the vehicle and should not be understood as limitations on this patent. The different opening and closing states of each valve component (switch valve, three-way valve) and the different start and stop states of the first water pump 19, the second water pump 20, the compressor 1, the vehicle interior fan 72 and the vehicle exterior fan 83 can still be flexibly combined to form a variety of other operation schemes, and different combination schemes should also be within the scope of the patent rights. For example, in Figure 9 Building on the existing air conditioning and dehumidification solution, opening the fourth throttle valve 16 and the fifth on-off valve 18 adds battery cooling, transforming it into an air conditioning and dehumidification + battery cooling solution. This adds the following refrigerant circulation path: compressor 1 → first three-way valve 2 → second on-off valve 5 → second in-vehicle heat exchanger 73 → second throttle valve 10 → flash evaporator 12 → fourth on-off valve 16 → third heat exchanger 17 → fifth on-off valve 18 → second three-way valve 3 → gas-liquid separator 15 → compressor 1. The liquid cooling circulation path: second water pump 20 → battery assembly 23 → ninth shut-off valve 25 → second water pump 20. A complete list is not provided here.

[0062] It should be noted that: each of the above-mentioned throttle valves can be an electronic expansion valve, etc. Each of the above-mentioned switch valves can be a stop valve, etc.

[0063] In a second aspect, an embodiment of the present invention further provides a vehicle, comprising: a vehicle thermal management system as in any embodiment of the first aspect.

[0064] In summary, it is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous technical features can be freely combined and superimposed.

[0065] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiment based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A thermal management system for a vehicle, characterized in that: include: A refrigerant circulation device comprises a compressor (1), a first in-vehicle heat exchanger (71), a heat exchange device (17), an out-vehicle heat exchanger (81), a first throttle valve (9), a third throttle valve (11), a fourth throttle valve (16), a first three-way valve (2), a second three-way valve (3), a first switch valve (4), and a fifth switch valve (18); the compressor (1), the first in-vehicle heat exchanger (71), the first throttle valve (9), the third throttle valve (11), and the out-vehicle heat exchanger (81) are connected in series to form a first refrigerant circulation flow path; the compressor (1), the heat exchange device (17), the fourth throttle valve (16), the third throttle valve (11), and the out-vehicle heat exchanger (81) are connected in series to form a second refrigerant circulation flow path; The first three-way valve (2) is used to switch the outlet of the compressor (1) to be connected to the first in-vehicle heat exchanger (71), the heat exchange device (17), or to be connected to the out-vehicle heat exchanger (81); the second three-way valve (3) is used to switch the inlet of the compressor (1) to be connected to the out-vehicle heat exchanger (81), or to be connected to the first in-vehicle heat exchanger (71), the heat exchange device (17), so as to change the flow direction of the first refrigerant circulation flow path and the second refrigerant circulation flow path; The first switch valve (4) is provided on the communication pipeline between the first three-way valve (2) and the first in-vehicle heat exchanger (71), and is used to open and close the first refrigerant circulation flow path; The fifth switch valve (18) is arranged on the connecting pipeline between the first three-way valve (2) and the heat exchange device (17) and is used to open and close the second refrigerant circulation flow path.

2. The vehicle thermal management system according to claim 1, wherein: The refrigerant circulation device also includes flash gas (12) and an oil-liquid separator (15), one end of the flash gas (12) is connected to the first throttle valve (9) and the fourth throttle valve (16), and the other end is connected to the third throttle valve (11), and the oil-liquid separator (15) is connected in series between the second three-way valve and the inlet of the compressor.

3. The vehicle thermal management system according to claim 2, characterized in that: When the first on-off valve (4) is opened, the first three-way valve (2) switches the outlet of the compressor (1) to communicate with the first in-vehicle heat exchanger (71), and the second three-way valve (3) switches the inlet of the compressor (1) to communicate with the outside-vehicle heat exchanger (81), the first in-vehicle heat exchanger (71) generates heat for in-vehicle air conditioning heating; and / or, When the fifth switch valve (18) is opened, the first three-way valve (2) switches the outlet of the compressor (1) to communicate with the heat exchange device (17), and the second three-way valve (3) switches the inlet of the compressor (1) to communicate with the off-vehicle heat exchanger (81), the heat exchange device (17) generates heat to heat the battery.

4. The vehicle thermal management system according to claim 2, wherein: When the first switch valve (4) is opened, the first three-way valve (2) switches the outlet of the compressor (1) to communicate with the vehicle-external heat exchanger (81), and the second three-way valve (3) switches the inlet of the compressor (1) to communicate with the first vehicle-interior heat exchanger (71), the first vehicle-interior heat exchanger (71) is cooled for vehicle-interior air conditioning cooling; and / or, When the fifth switch valve (18) is opened, the first three-way valve (2) switches the outlet of the compressor (1) to communicate with the off-vehicle heat exchanger (81), and the second three-way valve (3) switches the inlet of the compressor (1) to communicate with the heat exchange device (17), the heat exchange device (17) is refrigerated to cool the battery.

5. The vehicle thermal management system according to claim 2, wherein: The refrigerant circulation device further includes a second in-vehicle heat exchanger (73), a second throttle valve (10), a second on-off valve (5) and a third on-off valve (6); the compressor (1), the second in-vehicle heat exchanger (73), the second throttle valve (10), the flash gas (12), the first throttle valve (9), the first in-vehicle heat exchanger (71) and the oil-liquid separator (15) are connected in series to form a third refrigerant circulation flow path; the compressor (1), the second in-vehicle heat exchanger (73), the second throttle valve (10), the flash gas (12), the first throttle valve (9), the heat exchange device (17) and the oil-liquid separator (15) are connected in series to form a fourth refrigerant circulation flow path; The first three-way valve (2) is also used to switch the outlet of the compressor to the second in-vehicle heat exchanger (73), the second switch valve (5) is arranged on the connecting pipe between the outlet of the compressor and the second in-vehicle heat exchanger (73), and the third switch valve (6) is arranged on the connecting pipe between the outlet of the compressor and the external heat exchanger (81), and the second switch valve (5) is used to open and close the third refrigerant circulation flow path or the fourth refrigerant circulation flow path.

6. The vehicle thermal management system according to claim 5, characterized in that: When the second on-off valve (5) is opened, the first three-way valve (2) switches the outlet of the compressor to communicate with the second in-vehicle heat exchanger (73), the fifth on-off valve (18) is opened, and the first on-off valve (4) is closed, the second in-vehicle heat exchanger (73) is heated and the heat exchange device (17) is cooled; or, When the second on-off valve (5) is opened, the first three-way valve (2) switches the outlet of the compressor to communicate with the second in-vehicle heat exchanger (73), the first on-off valve (4) is opened, and the third on-off valve (6) is closed, the first in-vehicle heat exchanger (71) and the second in-vehicle heat exchanger (73) are used for in-vehicle air conditioning dehumidification.

7. The vehicle thermal management system according to any one of claims 1 to 6, characterized in that: Also includes: A liquid cooling circulation device comprises a first water pump (19), a radiator (82) and a seventh switch valve (22), wherein the first water pump (19) and the radiator (82) are connected in series with the electric drive assembly (13) of the vehicle to form a first liquid cooling circulation flow path, and the seventh switch valve (22) is used to open and close the first liquid cooling circulation flow path.

8. The vehicle thermal management system according to claim 7, characterized in that: The first water pump (19), the battery (23), the electric drive assembly (13) and the radiator (82) are connected in series to form a second liquid cooling circulation flow path, a sixth switch valve (21) is provided on the connecting pipe between the outlet of the first water pump (19) and the battery (23), and an eighth switch valve (24) is provided on the connecting pipe between the battery (23) and the electric drive assembly (13).

9. The vehicle thermal management system according to claim 7, characterized in that: The liquid cooling circulation device further includes a second water pump (20) and a ninth switch valve (25), wherein the second water pump is connected in series with the battery (23) and the heat exchange device (17) to form a third liquid cooling circulation flow path, and the ninth switch valve (25) is used to open and close the second liquid cooling circulation flow path.

10. The vehicle thermal management system according to any one of claims 1-6, 8-9, characterized in that: A liquid replenishing pipeline is provided between the flash gas (12) and the compressor (1), and a fourth switch valve (14) is provided on the liquid replenishing pipeline.

11. A vehicle, characterized in that: include: A vehicle thermal management system according to any one of claims 1 to 10.

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