Vehicle thermal management system

Abstract

An embodiment provides a vehicle thermal management system, characterized in that it includes: a refrigerant circulation pipeline for refrigerant to flow sequentially through a compressor and an indoor unit; and a cooling water circulation pipeline for cooling water to flow through. In the refrigerant circulation pipeline, a heat exchanger connected to the cooling water circulation pipeline is disposed between the compressor and the indoor unit, so that refrigerant exchanging heat with the cooling water flows into the indoor unit.

Description

Technical Field

[0001] This invention relates to a vehicle thermal management system. Background Technology

[0002] The vehicle air conditioning system uses a heat pump system, which selectively cools and heats the vehicle's interior by circulating refrigerant.

[0003] Heat pump systems in vehicles that use batteries, such as electric vehicles, are configured to recover waste heat from electrical components and the battery by exchanging heat between the refrigerant and cooling water, thereby improving the system's performance. In such heat pump systems, the system structure is simple, and performance changes are generated by controlling the movement of the refrigerant and cooling water. Therefore, a method to improve performance and efficiency is needed, and this has been investigated. Summary of the Invention

[0004] Technical issues

[0005] The problem to be solved by the present invention is to provide a vehicle thermal management system that can improve the performance and efficiency of cooling and heating.

[0006] The subject matter of this invention is not limited to the subject matter mentioned above, and those skilled in the art will clearly understand from the following description other subject matter not mentioned herein.

[0007] Methods for solving problems

[0008] The vehicle thermal management system of an embodiment of the present invention may include: a refrigerant circulation pipeline for refrigerant to flow sequentially through a compressor and an indoor unit; and a cooling water circulation pipeline for cooling water to flow through. In the refrigerant circulation pipeline, a heat exchanger connected to the cooling water circulation pipeline is disposed between the compressor and the indoor unit, so that the refrigerant exchanging heat with the cooling water flows into the indoor unit.

[0009] The heat exchanger and the compressor described above can be integrated into one unit.

[0010] The aforementioned refrigerant circulation pipeline may include: a first refrigerant pipeline, which is provided with a first expansion valve, an outdoor unit, a second expansion valve, an evaporator, and a gas-liquid separator through which the refrigerant flowing through the indoor unit flows in sequence; and a second refrigerant pipeline, which allows the refrigerant flowing through the outdoor unit to bypass the second expansion valve and the evaporator.

[0011] A third expansion valve and a cooler may be installed in the second refrigerant line mentioned above.

[0012] One end of the second refrigerant line can be connected to the first refrigerant line between the outdoor unit and the second expansion valve, and the other end can be connected to the first refrigerant line between the evaporator and the gas-liquid separator.

[0013] The vehicle thermal management system may further include: a third refrigerant line, one end of which is connected to the first refrigerant line at the inlet side front end of the indoor unit, and the other end of which is connected to the first refrigerant line at the inlet side front end of the gas-liquid separator; a fourth expansion valve may be provided in the third refrigerant line.

[0014] The vehicle thermal management system may further include: an internal heat exchanger disposed in the first refrigerant line, which facilitates heat exchange between the refrigerant flowing through the outdoor unit and the refrigerant flowing through the gas-liquid separator toward the compressor.

[0015] The indoor unit and the evaporator can be installed inside the air conditioning unit, and a temperature regulating door can be installed between the indoor unit and the evaporator.

[0016] The aforementioned cooling water circulation pipeline may include: a first cooling water pipeline for circulating cooling water through electrical components and equipped with a radiator; a second cooling water pipeline for circulating cooling water through the battery and equipped with a heater; a cooling water valve selectively connecting the first cooling water pipeline and the second cooling water pipeline; a cooling water diversion pipeline, one end of which is connected to the second cooling water pipeline at the front end of the battery inlet side via the cooling water valve, and the other end of which is connected to the second cooling water pipeline at the rear end of the battery outlet side; and a cooling water connection pipeline, one end of which is connected to the first cooling water pipeline at the rear end of the electrical components outlet side, and the other end of which is connected to the second cooling water pipeline at the rear end of the battery outlet side.

[0017] The first cooling water pipeline can be connected to the heat exchanger, and the second cooling water pipeline can be connected to the cooler.

[0018] In the first cooling mode, the first cooling water pipeline forms an independent cooling water circulation loop, so that the cooling water in the first cooling water pipeline flows through the heat exchanger and moves. No cooling water flows in the second cooling water pipeline. The refrigerant in the first refrigerant pipeline is discharged from the compressor, flows through the heat exchanger and exchanges heat with the cooling water in the first cooling water pipeline, and then moves to the indoor unit. With the third expansion valve closed, it flows through the first expansion valve, the outdoor unit, the second expansion valve, the evaporator, and the gas-liquid separator before flowing into the compressor.

[0019] In the second cooling mode, the first cooling water pipeline and the second cooling water pipeline each achieve independent cooling water circulation loops. The cooling water in the first cooling water pipeline flows through the heat exchanger, and the cooling water in the second cooling water pipeline flows through the cooler. The refrigerant in the first refrigerant pipeline is discharged from the compressor, flows through the heat exchanger, exchanges heat with the cooling water in the first cooling water pipeline, and then flows to the indoor unit. A portion of the refrigerant flowing through the first expansion valve and the outdoor unit flows along the second refrigerant pipeline through the third expansion valve and the cooler, exchanges heat with the cooling water in the second cooling water pipeline, and then flows into the compressor through the gas-liquid separator. The remaining portion of the refrigerant flows along the first refrigerant pipeline through the second expansion valve, the evaporator, and the gas-liquid separator before flowing into the compressor.

[0020] In the first heating mode, cooling water does not flow in the cooling water circulation pipeline. The refrigerant in the first refrigerant pipeline is discharged from the compressor and flows through the heat exchanger, the indoor unit, the first expansion valve and the outdoor unit. With the second expansion valve closed, the refrigerant flows along the second refrigerant pipeline through the third expansion valve and the cooler, and then through the gas-liquid separator before flowing into the compressor.

[0021] In the second heating mode, the cooling water flowing through the electrical components in the first cooling water pipeline moves along the cooling water connection pipeline to the second cooling water pipeline. In the second cooling water pipeline, the cooling water flows through the cooler and then moves from the cooling water valve back to the first cooling water pipeline. The refrigerant in the first refrigerant pipeline is discharged from the compressor and flows through the heat exchanger, the indoor unit, the first expansion valve, and the outdoor unit. With the second expansion valve closed, the refrigerant flows along the second refrigerant pipeline through the third expansion valve and the cooler to exchange heat with the cooling water in the second cooling water pipeline. After passing through the gas-liquid separator, it flows into the compressor.

[0022] In the third heating mode, the cooling water flowing through the electrical components in the first cooling water pipeline moves along the cooling water connection pipeline to the second cooling water pipeline, then passes through the cooler and moves from the cooling water valve back to the first cooling water pipeline. The cooling water flowing through the battery in the second cooling water pipeline moves along the cooling water diversion pipeline from the cooling water valve back to the second cooling water pipeline. The refrigerant in the first refrigerant pipeline is discharged from the compressor and flows through the heat exchanger, the indoor unit, the first expansion valve, and the outdoor unit. With the second expansion valve closed, the refrigerant flows along the second refrigerant pipeline through the third expansion valve and the cooler, exchanges heat with the cooling water in the second cooling water pipeline, and then flows into the compressor through the gas-liquid separator.

[0023] The refrigerant circulation pipeline may further include: a fourth refrigerant pipeline, which diverts the refrigerant flowing through the indoor unit to bypass the outdoor unit. One end of the fourth refrigerant pipeline is connected to the first refrigerant pipeline at the inlet side front end of the outdoor unit, and the other end is connected to the first refrigerant pipeline at the outlet side rear end of the outdoor unit. A first valve is provided in the fourth refrigerant pipeline, and a second valve is provided between the inlet side front end of the outdoor unit and the branch point of the fourth refrigerant pipeline. In heating mode, the refrigerant in the first refrigerant pipeline is discharged from the compressor, passes through the heat exchanger and the indoor unit, and flows through the first expansion valve to expand. When the first valve is open and the second valve is closed, the refrigerant moves along the fourth refrigerant pipeline around the outdoor unit. When the second expansion valve is closed, the refrigerant flows along the second refrigerant pipeline through the third expansion valve and the cooler, and then flows through the gas-liquid separator and into the compressor.

[0024] The refrigerant circulation pipeline may further include: a fifth refrigerant pipeline, which diverts the refrigerant flowing through the indoor unit to bypass the outdoor unit. One end of the fifth refrigerant pipeline is connected to the first refrigerant pipeline between the first expansion valve and the outdoor unit, and the other end is connected to the second refrigerant pipeline between the cooler and the third expansion valve. A first valve is provided in the fifth refrigerant pipeline, and a second valve is provided between the inlet front end of the outdoor unit and the branch point of the fifth refrigerant pipeline. In heating mode, the refrigerant in the first refrigerant pipeline is discharged from the compressor and flows through the heat exchanger and the indoor unit, and expands by flowing through the first expansion valve. When the first valve is open and the second valve is closed, the refrigerant moves along the fifth refrigerant pipeline around the outdoor unit to the second refrigerant pipeline. When the third expansion valve is closed, the refrigerant flows through the cooler and then through the gas-liquid separator before flowing into the compressor.

[0025] The refrigerant circulation pipeline may further include: a fifth refrigerant pipeline, which diverts the refrigerant flowing through the indoor unit to bypass the outdoor unit. One end of the fifth refrigerant pipeline is connected to the first refrigerant pipeline between the indoor unit and the first expansion valve, and the other end is connected to the second refrigerant pipeline at the inlet end of the third expansion valve. A first valve is provided in the fifth refrigerant pipeline. In heating mode, the refrigerant in the first refrigerant pipeline is discharged from the compressor and flows through the heat exchanger and the indoor unit. When the first expansion valve is closed and the first valve is open, the refrigerant moves along the fifth refrigerant pipeline, bypasses the outdoor unit, and flows to the second refrigerant pipeline. After expanding through the third expansion valve, it passes through the cooler and the gas-liquid separator and flows into the compressor.

[0026] The refrigerant circulation pipeline may further include: a fifth refrigerant pipeline, which diverts the refrigerant flowing through the indoor unit to bypass the outdoor unit. One end of the fifth refrigerant pipeline is connected to the first refrigerant pipeline between the indoor unit and the first expansion valve, and the other end is connected to the second refrigerant pipeline at the inlet front end of the third expansion valve. A fifth expansion valve is provided in the fifth refrigerant pipeline. In heating mode, the refrigerant in the first refrigerant pipeline is discharged from the compressor and flows through the heat exchanger and the indoor unit. When the first expansion valve is closed, it flows through the fifth expansion valve and expands. Then, it moves along the fifth refrigerant pipeline, bypasses the outdoor unit, and moves towards the second refrigerant pipeline. After flowing through the third expansion valve and the cooler, it passes through the gas-liquid separator and flows into the compressor.

[0027] Invention Effects

[0028] According to embodiments of the present invention, a vehicle thermal management system capable of improving cooling and heating performance can be provided.

[0029] The effects of this invention are not limited to those mentioned above, and those skilled in the art can clearly understand other effects not mentioned herein through the claims. Attached Figure Description

[0030] Figure 1 This is a schematic diagram illustrating a vehicle thermal management system according to an embodiment of the present invention.

[0031] Figure 2 This is a diagram illustrating the operation of the vehicle's thermal management system in its first cooling mode.

[0032] Figure 3 This diagram illustrates the operation of the vehicle's thermal management system in its second cooling mode.

[0033] Figure 4 This is a diagram illustrating the operation of the vehicle's thermal management system in its third cooling mode.

[0034] Figure 5 This is a diagram illustrating the operation of the vehicle's thermal management system in its first heating mode.

[0035] Figure 6 This is a diagram illustrating operation in a first heating mode of another embodiment of the vehicle thermal management system.

[0036] Figure 7 This is a diagram illustrating the operation of the vehicle's thermal management system in its second heating mode.

[0037] Figure 8 This is a diagram illustrating the operation of the vehicle's thermal management system in its third heating mode.

[0038] Figure 9 This is a schematic diagram illustrating a vehicle thermal management system according to another embodiment of the present invention.

[0039] Figure 10 It is shown Figure 9 The diagram shows the operation of the vehicle thermal management system in hot air mode.

[0040] Figure 11 This is a schematic diagram illustrating a vehicle thermal management system according to yet another embodiment of the present invention.

[0041] Figure 12 This is a schematic diagram illustrating a vehicle thermal management system according to yet another embodiment of the present invention.

[0042] Figure 13 This is a schematic diagram illustrating a vehicle thermal management system according to yet another embodiment of the present invention.

[0043] Figure 14 and Figure 15 It is shown Figure 13 The diagram shows a modified example of the vehicle thermal management system. Detailed Implementation

[0044] This invention can be modified in various ways and can have various embodiments; therefore, specific embodiments are illustrated and described herein in the accompanying drawings. However, this invention is not limited to specific embodiments, but includes all modifications, equivalents, and even substitutions that fall within the scope of the invention's concept and technology. Ordinal terms such as "first," "second," etc., are used to describe various constituent elements, but these terms do not limit the aforementioned constituent elements. These terms are only used to distinguish one constituent element from other constituent elements. For example, without departing from the scope of this invention, a second constituent element may be named a first constituent element, and similarly, a first constituent element may be named a second constituent element. And / or such terms include a combination of multiple related described items or any one of multiple related described items.

[0045] When referring to a constituent element being "connected" or "linked" to other constituent elements, although it may be directly connected or linked to other constituent elements, there may also be another constituent element in between. Conversely, when referring to a constituent element being "directly connected" or "directly linked" to another constituent element, it should be understood that there are no other constituent elements in between.

[0046] When describing the embodiments, when it is stated that a certain constituent element is formed "on or under" another constituent element, "on or under" includes the case where the two constituent elements are in direct contact with each other or where one or more other constituent elements are disposed between the two constituent elements. Furthermore, when expressed as "on or under," based on one constituent element, it can indicate either an upper direction or a lower direction.

[0047] The terminology used in this application is for illustrative purposes only and is not intended to limit the invention. Unless otherwise defined herein, the singular includes multiple meanings. In this application, terms such as "comprising" or "possessing" are used to specify the presence of features, numbers, steps, operations, constituent elements, components, or combinations thereof described in the specification, and do not preclude the presence or additional possibilities of one or more other features or numbers, steps, operations, constituent elements, components, or combinations thereof.

[0048] Unless otherwise defined, all terms used herein, including technical or scientific terms, shall have the same meaning as understood by one of ordinary skill in the art in general circumstances. Terms defined in dictionaries for general use shall be interpreted as having the same meaning as in relevant technical texts, and shall not be interpreted as having an ideal or overly formal meaning unless explicitly defined in this application.

[0049] Hereinafter, the embodiments will be described in detail with reference to the accompanying drawings. Regardless of the symbols in the drawings, the same or corresponding constituent elements will be given the same symbols and repeated descriptions of them will be omitted.

[0050] Figure 1 A vehicle thermal management system 1, according to an embodiment of the present invention, is shown in a schematic diagram.

[0051] Reference Figure 1 The vehicle thermal management system 1 of the present invention generally includes: a refrigerant circulation pipeline 100 for refrigerant circulation; and a cooling water circulation pipeline 200 for cooling water circulation.

[0052] The refrigerant circulation line 100 may be configured to circulate refrigerant discharged from the compressor 110. In an embodiment, the refrigerant circulation line 100 may include a first refrigerant line 101 and a second refrigerant line 102. The refrigerant may move and circulate along the first refrigerant line 101. Alternatively, the refrigerant may be diverted to the first refrigerant line 101 and the second refrigerant line 102 for movement.

[0053] The first refrigerant line 101 may be equipped with a compressor 110, a heat exchanger 120, an indoor unit 130, a first expansion valve 191, an outdoor unit 140, a second expansion valve 192, an evaporator 150, and an accumulator 160. In the first refrigerant line 101, the refrigerant moves through the compressor 110 and the heat exchanger 120 and then sequentially through the indoor unit 130. The refrigerant flowing through the indoor unit 130 sequentially flows through the first expansion valve 191, the outdoor unit 140, the second expansion valve 192, the evaporator 150, and the accumulator 160 before flowing back into the compressor 110.

[0054] The second refrigerant line 102 is configured to allow the refrigerant flowing through the outdoor unit 140 to bypass the second expansion valve 192 and the evaporator 150, and may be provided with a third expansion valve 193 and a chiller 170.

[0055] One end of the second refrigerant line 102 is connected to the first refrigerant line 101 between the outdoor unit 140 and the second expansion valve 192, and the other end can be connected to the first refrigerant line 101 between the evaporator 150 and the gas-liquid separator 160. The refrigerant flowing through the outdoor unit 140 can be diverted from the first refrigerant line 101 and move along the second refrigerant line 102, flowing through the third expansion valve 193 and the cooler 170. Alternatively, it can merge with the first refrigerant line 101 and flow through the gas-liquid separator 160 into the compressor 110.

[0056] The compressor 110 receives power from a power unit such as an engine or motor to drive it and compresses the incoming refrigerant into a high-temperature, high-pressure gaseous state before discharging it into the first refrigerant line 101.

[0057] Indoor unit 130 condenses the refrigerant discharged from compressor 110. Indoor unit 130 is located inside air conditioning unit 300, where refrigerant exchanges heat with a heat medium. The heat medium for heat exchange with the refrigerant can be air flowing inside air conditioning unit 300. The air is heated in indoor unit 130 and flows into the vehicle interior to provide heating.

[0058] The heat exchanger 120 can be disposed between the compressor 110 and the indoor unit 130 in the first refrigerant line 101. The heat exchanger 120 can be configured to be connected to the cooling water circulation line 200 so that the refrigerant exchanging heat with the cooling water flows into the indoor unit 130. That is, the heat exchanger 120 allows the high-temperature refrigerant discharged from the compressor 110 to exchange heat with the cooling water and flow into the indoor unit 130 in a cooled state. As a result, the thermal deformation and heat pick-up phenomenon of the air conditioning unit 300 can be minimized.

[0059] In this embodiment, the heat exchanger 120 may be integrally formed with the compressor 110. This embodiment illustrates a case where the heat exchanger 120 is integrally formed with the compressor 110, but is not limited to this. For example, the heat exchanger 120 may also be configured as a separate, independent structure from the compressor 110.

[0060] The outdoor unit 140 allows incoming refrigerant to exchange heat with a heat medium. In an embodiment, the outdoor unit 140 may include an air-cooled condenser, and the heat medium exchanging heat with the refrigerant may include outside air. The refrigerant exchanging heat with the outside air may be condensed.

[0061] The evaporator 150 and the indoor unit 130 are installed together inside the air conditioning unit 300, allowing the incoming refrigerant to exchange heat with a heat medium. The heat medium that exchanges heat with the refrigerant can be air flowing inside the air conditioning unit 300. The air that exchanges heat with the refrigerant is supplied to the vehicle interior to cool the vehicle interior.

[0062] Inside the air conditioning unit 300, a temperature regulating door 310 may be provided between the indoor unit 130 and the evaporator 150 to regulate the amount of air bypassing the indoor unit 130 and the amount of air flowing through the indoor unit 130. In addition, an electric heater (not shown) for heating air may also be provided inside the air conditioning unit 300.

[0063] The cooler 170 may be configured to exchange heat between the refrigerant moving along the second refrigerant line 102 and a heat medium. Here, the heat medium may include cooling water circulating along the cooling water circulation line 200. That is, the cooler 170 can recover waste heat from the electrical components 220 by exchanging heat with the cooling water. Additionally, the cooler 170 may cool the battery 260.

[0064] When the refrigerant flows in along the first refrigerant line 101, the gas-liquid separator 160 can separate the refrigerant into gas and liquid and supply gaseous refrigerant to the compressor 110.

[0065] In this embodiment, an internal heat exchanger 180 may also be provided in the first refrigerant line 101. The internal heat exchanger 180 allows the refrigerant flowing through the outdoor unit 140 to exchange heat with the refrigerant flowing through the gas-liquid separator 160 and towards the compressor 110.

[0066] The first expansion valve 191, the second expansion valve 192, and the third expansion valve 193 can perform refrigerant expansion, flow control, and opening / closing functions. In an embodiment, the first expansion valve 191, the second expansion valve 192, and the third expansion valve 193 can be fully open electronic two-way expansion valves.

[0067] The cooling water circulation pipeline 200 may include a first cooling water pipeline 201 for circulating cooling water through the electrical components 220, a second cooling water pipeline 202 for circulating cooling water through the battery 260, a cooling water valve 210, a cooling water diversion pipeline 203, and a cooling water connection pipeline 204.

[0068] The first cooling water line 201 is connected to the heat exchanger 120, so that the cooling water in the first cooling water line 201 can exchange heat with the refrigerant discharged from the compressor 110 in the heat exchanger 120. The first cooling water line 201 may be equipped with electrical components 220, a first pump 230 for circulating cooling water, a radiator 240 for cooling the cooling water, and a liquid storage tank 250.

[0069] The second cooling water line 202 is connected to the cooler 170, so that the cooling water in the second cooling water line 202 can exchange heat with the refrigerant moving along the second refrigerant line 102 in the cooler 170. The second cooling water line 202 may be equipped with a battery 260, a second pump 270 for circulating the cooling water, and a heater 280.

[0070] Cooling water valve 210 can selectively connect to the first cooling water pipe 201 and the second cooling water pipe 202. Cooling water valve 210 allows the first cooling water pipe 201 and the second cooling water pipe 202 to operate in an independent circulation loop, preventing the cooling water from the first cooling water pipe 201 and the second cooling water pipe 202 from mixing. Alternatively, cooling water valve 210 can also operate in a connected circulation loop between the first cooling water pipe 201 and the second cooling water pipe 202, allowing cooling water to move along both pipes.

[0071] One end of the cooling water distribution pipe 203 can be connected to the second cooling water pipe 202 at the front end of the inlet side of the battery 260 via the cooling water valve 210, and the other end can be connected to the second cooling water pipe 202 at the rear end of the outlet side of the battery 260. The cooling water distribution pipe 203 and the second cooling water pipe 202 are associated to form a closed loop for cooling water to circulate through the battery 260.

[0072] One end of the cooling water connection pipe 204 can be connected to the first cooling water pipe 201 at the rear end of the outlet side of the electrical component 220, and the other end can be connected to the second cooling water pipe 202 at the rear end of the outlet side of the battery 260. The cooling water connection pipe 204 is associated with the cooling water valve 210 to realize a circulation loop for cooling water to move between the first cooling water pipe 201 and the second cooling water pipe 202. In an embodiment, cooling water can move from the first cooling water pipe 201 along the cooling water connection pipe 204 to the second cooling water pipe 202, and circulate in the second cooling water pipe 202 by moving back to the first cooling water pipe 201 through the cooling water valve 210.

[0073] The operation of the vehicle thermal management system 1 according to an embodiment of the present invention will now be described.

[0074] Figure 2 This shows the operation in the first cooling mode.

[0075] Reference Figure 2 In the first cooling mode, the first cooling water pipe 201 realizes an independent cooling water circulation loop, so that the cooling water in the first cooling water pipe 201 moves through the heat exchanger 120, and no cooling water flows in the second cooling water pipe 202.

[0076] That is, the cooling water valve 210 operates in such a way that cooling water circulates along the first cooling water pipe 201. The cooling water flowing through the electrical component 220 flows through the heat exchanger 120 and exchanges heat with the refrigerant (absorbs heat), and flows through the radiator 240 to exchange heat with the outside air. Furthermore, it moves in such a way that it flows through the cooling water valve 210 and then back through the electrical component 220.

[0077] Refrigerant from the first refrigerant line 101, discharged from the compressor 110, flows through the heat exchanger 120 and exchanges heat (dissipates heat) with the cooling water in the first cooling water line 201 before moving to the indoor unit 130 and exchanging heat with the air inside the air conditioning unit 300. At this time, the temperature control door 310 prevents the air exchanging heat with the refrigerant in the indoor unit 130 from being supplied to the passenger compartment. The refrigerant, in a non-expansion state, flows through the fully open first expansion valve 191 and then exchanges heat with the outside air in the outdoor unit 140.

[0078] With the third expansion valve 193 closed, the refrigerant flowing through the outdoor unit 140 expands by passing through the second expansion valve 192 and flows into the evaporator 150 to exchange heat with the air inside the air conditioning unit 300. This allows cooled air to be supplied to the vehicle interior for cooling. The refrigerant flowing through the evaporator 150 then passes through the gas-liquid separator 160 and re-flows into the compressor 110.

[0079] In this way, the high-temperature refrigerant discharged from the compressor 110 exchanges heat with the cooling water in the heat exchanger 120 and flows into the indoor unit 130 in a state of temperature reduction, thereby minimizing the thermal deformation and heat recovery phenomenon of the air conditioning unit 300.

[0080] Figure 3 This shows the operation in the second cooling mode.

[0081] Reference Figure 3 In the second cooling mode, the first cooling water pipe 201 and the second cooling water pipe 202 respectively realize independent cooling water circulation loops. The cooling water of the first cooling water pipe 201 flows through the heat exchanger 120 and moves, while the cooling water of the second cooling water pipe 202 flows through the cooler 170 and moves.

[0082] Specifically, the cooling water valve 210 operates to allow cooling water to circulate independently along the first cooling water pipe 201. The cooling water flowing through the electrical components 220 flows through the heat exchanger 120 and exchanges heat with the refrigerant (heat absorption), and then flows through the radiator 240 to exchange heat with the outside air. It then moves by passing through the cooling water valve 210 and flowing back through the electrical components 220. Additionally, the cooling water valve 210 operates to allow cooling water to circulate independently along the second cooling water pipe 202. The cooling water flowing through the battery 260 flows through the cooler 170 to exchange heat with the refrigerant (heat dissipation), and then moves by passing through the cooling water valve 210 and flowing back through the battery 260.

[0083] Refrigerant from the first refrigerant line 101, discharged from the compressor 110, flows through the heat exchanger 120 and exchanges heat (dissipates heat) with the cooling water in the first cooling water line 201 before moving to the indoor unit 130 and exchanging heat with the air inside the air conditioning unit 300. At this time, the temperature control door 310 prevents the air exchanging heat with the refrigerant in the indoor unit 130 from being supplied to the passenger compartment. The refrigerant, in a non-expansion state, flows through the fully open first expansion valve 191 and then exchanges heat with the outside air in the outdoor unit 140.

[0084] A portion of the refrigerant flowing through the outdoor unit 140 is diverted to the second refrigerant line 102 and expands through the third expansion valve 193, then flows into the cooler 170 to exchange heat (absorb heat) with the cooling water in the second cooling water line 202. This cools the battery 260. The refrigerant flowing through the cooler 170 passes through the gas-liquid separator 160 in the first refrigerant line 101 and then flows back into the compressor 110.

[0085] The remaining portion of the refrigerant flowing through the outdoor unit 140 expands along the first refrigerant line 101 through the second expansion valve 192 and flows into the evaporator 150 to exchange heat with the air inside the air conditioning unit 300. Thus, cooled air is supplied to the vehicle interior for refrigeration. The refrigerant flowing through the evaporator 150, together with the refrigerant converging in the second refrigerant line 102, passes through the gas-liquid separator 160 and re-flows into the compressor 110.

[0086] Figure 4 This shows the operation in the third cooling mode.

[0087] Reference Figure 4In the third cooling mode, the first cooling water pipe 201 and the second cooling water pipe 202 each form an independent cooling water circulation loop. The cooling water in the first cooling water pipe 201 flows through the heat exchanger 120, and the cooling water in the second cooling water pipe 202 flows through the cooler 170. The movement of cooling water in the third cooling mode is the same as in the second cooling mode, so detailed descriptions are omitted.

[0088] Refrigerant from the first refrigerant line 101, discharged from the compressor 110, flows through the heat exchanger 120 and exchanges heat (dissipates heat) with the cooling water in the first cooling water line 201 before moving to the indoor unit 130 and exchanging heat with the air inside the air conditioning unit 300. At this time, the temperature control door 310 prevents the air exchanging heat with the refrigerant in the indoor unit 130 from being supplied to the passenger compartment. The refrigerant, in a non-expansion state, flows through the fully open first expansion valve 191 and then exchanges heat with the outside air in the outdoor unit 140.

[0089] With the second expansion valve 192 closed, the refrigerant flowing through the outdoor unit 140 is diverted to the second refrigerant line 102 and expands through the third expansion valve 193, then flows into the cooler 170 to exchange heat (absorb heat) with the cooling water in the second cooling water line 202. This cools the battery 260. The refrigerant flowing through the cooler 170 passes through the gas-liquid separator 160 in the first refrigerant line 101 and re-flows into the compressor 110.

[0090] Figure 5 This shows the operation in the first heating mode.

[0091] Reference Figure 5 In the first heating mode, cooling water does not flow in the cooling water circulation pipe 200.

[0092] Refrigerant from the first refrigerant line 101, discharged from the compressor 110, flows through the heat exchanger 120 without exchanging heat with the cooling water, and then moves to the indoor unit 130, where it exchanges heat with the air inside the air conditioning unit 300. At this time, the temperature control door 310 is opened to supply the air that has exchanged heat with the refrigerant in the indoor unit 130 to the vehicle compartment. Thus, the air heated by the refrigerant is supplied as hot air to the vehicle interior for heating.

[0093] The refrigerant flowing through the indoor unit 130 expands by passing through the first expansion valve 191 and exchanges heat (absorbs heat) with the outside air in the outdoor unit 140. With the second expansion valve 192 closed, the refrigerant flowing through the outdoor unit 140 flows along the second refrigerant line 102 in a non-expanded state through the fully open third expansion valve 193, and then flows through the cooler 170 and the gas-liquid separator 160 before flowing into the compressor 110.

[0094] In this way, in the first heating mode, it operates by absorbing heat from the outside air in the outdoor unit 140.

[0095] Figure 6 The operation in the first heating mode of another embodiment is shown.

[0096] Reference Figure 6 In the first heating mode, the cooling water circulation pipe 200 can be configured to circulate cooling water through the battery 260. That is, the second cooling water pipe 202 is associated with the cooling water diversion pipe 203 to form a closed loop for cooling water to circulate through the battery 260. Specifically, the cooling water flowing through the battery 260 moves along the cooling water diversion pipe 203 and can move from the cooling water valve 210 to the second cooling water pipe 202 to flow back through the battery 260. At this time, the heater 280 operates to heat the cooling water, thereby raising the temperature of the battery 260.

[0097] Refrigerant movement and Figure 5 The situation is the same under the first heating mode disclosed, so detailed descriptions are omitted.

[0098] Figure 7 This shows the operation in the second heating mode.

[0099] Reference Figure 7 In the second heating mode, the cooling water flowing through the electrical component 220 in the first cooling water pipe 201 moves along the cooling water connection pipe 204 to the second cooling water pipe 202. After flowing through the cooler 170 in the second cooling water pipe 202, the cooling water moves from the cooling water valve 210 back to the first cooling water pipe 201.

[0100] Refrigerant from the first refrigerant line 101, discharged from the compressor 110, flows through the heat exchanger 120 without exchanging heat with the cooling water, and then moves to the indoor unit 130, where it exchanges heat with the air inside the air conditioning unit 300. At this time, the temperature control door 310 is opened to supply the air that has exchanged heat with the refrigerant in the indoor unit 130 to the vehicle compartment. Thus, the air heated by the refrigerant is supplied as hot air to the vehicle interior for heating.

[0101] The refrigerant flowing through the indoor unit 130 expands by passing through the first expansion valve 191 and flows through the outdoor unit 140 without exchanging heat with the outside air. For example, the active air flap and fan (not shown) located at the front of the outdoor unit 140 are not driven, thereby preventing the outside air from exchanging heat with the refrigerant in the outdoor unit 140.

[0102] With the second expansion valve 192 closed, the refrigerant flowing through the outdoor unit 140 flows along the second refrigerant line 102 in a non-expanded state through the fully open third expansion valve 193, and flows into the cooler 170 to exchange heat (absorb heat) with the cooling water in the second cooling water line 202. The refrigerant flowing through the cooler 170 passes through the gas-liquid separator 160 in the first refrigerant line 101 and then flows back into the compressor 110.

[0103] In this way, in the second heating mode, it operates by recovering the waste heat of the electrical components 220 in the cooler 170.

[0104] On the other hand, according to an embodiment, the refrigerant may also be configured to flow in a non-expansion state through a fully open first expansion valve 191 and then through a third expansion valve 193 to expand. In this case, the active air valve and fan are driven to further absorb heat from the outside air in the outdoor unit 140.

[0105] Figure 8 This shows the operation in the third heating mode.

[0106] Reference Figure 8 In the third heating mode, the cooling water flowing through the electrical component 220 in the first cooling water pipe 201 moves along the cooling water connection pipe 204 to the second cooling water pipe 202. In the second cooling water pipe 202, the cooling water flows through the cooler 170 and then moves from the cooling water valve 210 back to the first cooling water pipe 201 (see reference). Figure 7 Additionally, the cooling water flowing through the battery 260 in the second cooling water pipe 202 moves from the cooling water valve 210 to the second cooling water pipe 202 along the cooling water diversion pipe 203 (see reference). Figure 6 ).

[0107] Refrigerant from the first refrigerant line 101, discharged from the compressor 110, flows through the heat exchanger 120 without exchanging heat with the cooling water, and then moves to the indoor unit 130, where it exchanges heat with the air inside the air conditioning unit 300. At this time, the temperature control door 310 is opened to supply the air that has exchanged heat with the refrigerant in the indoor unit 130 to the vehicle compartment. Thus, the air heated by the refrigerant is supplied as hot air to the vehicle interior for heating.

[0108] The refrigerant flowing through the indoor unit 130 flows through the fully open first expansion valve 191 in a non-expansion state and flows through the outdoor unit 140 without exchanging heat with the outside air. For example, the active air valve and fan (not shown) located in front of the outdoor unit 140 are not driven, thereby preventing the outside air from exchanging heat with the refrigerant in the outdoor unit 140. This melts the frost (defrosting) that forms on the outdoor unit 140.

[0109] With the second expansion valve 192 closed, the refrigerant flowing through the outdoor unit 140 expands along the second refrigerant line 102 through the third expansion valve 193 and flows into the cooler 170 to exchange heat (absorb heat) with the cooling water in the second cooling water line 202. The refrigerant flowing through the cooler 170 passes through the gas-liquid separator 160 in the first refrigerant line 101 and flows back into the compressor 110.

[0110] In this way, in the third heating mode, it operates by recovering waste heat from the electrical components 220 in the cooler 170. Additionally, heating the battery 260 allows for defrosting of the outdoor unit 140.

[0111] Figure 9 A vehicle thermal management system 2, according to another embodiment of the present invention, is shown in schematic. Figure 9 In Figure 1 The state of the cooling water circulation pipeline 200 is omitted, and the refrigerant circulation pipeline 100 and its structure are shown.

[0112] and Figure 1 Unlike the thermal management system 1 of the embodiment, the thermal management system 2 of this embodiment also includes a third refrigerant line 103 in the refrigerant circulation line 100. The following description focuses on the differences.

[0113] The third refrigerant line 103 is configured to divert a portion of the refrigerant flowing into the indoor unit 130 to bypass the indoor unit 130, the outdoor unit 140, and the evaporator 150, and may be equipped with a fourth expansion valve 194.

[0114] One end of the third refrigerant line 103 can be connected to the first refrigerant line 101 at the inlet side of the indoor unit 130, and the other end can be connected to the first refrigerant line 101 at the inlet side of the gas-liquid separator 160. A portion of the refrigerant flowing into the indoor unit 130 is diverted from the first refrigerant line 101 and moves along the third refrigerant line 103, and can flow through the fourth expansion valve 194. Furthermore, it can merge with the first refrigerant line 101 and flow into the compressor 110 through the gas-liquid separator 160.

[0115] In an embodiment, the fourth expansion valve 194 may be a fully open electronic two-way expansion valve.

[0116] Figure 10 This shows the operation of the thermal management system 2 in hot air mode.

[0117] Reference Figure 10In hot mode, as in the first heating mode, the cooling water circulation pipe 200 can be configured as a stationary cooling water system. Alternatively, as in the second heating mode, the cooling water flowing through the electrical components 220 in the first cooling water pipe 201 moves along the cooling water connection pipe 204 to the second cooling water pipe 202, and after flowing through the cooler 170 in the second cooling water pipe 202, it moves from the cooling water valve 210 back to the first cooling water pipe 201. Of course, as in the third heating mode, the second cooling water pipe 202 can also be associated with the cooling water distribution pipe 203 to further realize a closed loop for cooling water to circulate through the battery 260.

[0118] The refrigerant in the first refrigerant line 101 is discharged from the compressor 110 and flows through the heat exchanger 120 without exchanging heat with the cooling water before moving to the indoor unit 130, and a portion of it is diverted to move along the third refrigerant line 103.

[0119] The refrigerant flows through the indoor unit 130 and exchanges heat with the air inside the air conditioning unit 300, thereby providing heating. After expanding through the first expansion valve 191, it passes through the outdoor unit 140, the fully open third expansion valve 193, the cooler 170, and the gas-liquid separator 160 before flowing into the compressor 110. This refrigerant movement is the same as in the first or second heating mode, therefore detailed descriptions are omitted.

[0120] The refrigerant diverted to the third refrigerant line 103 expands through the fourth expansion valve 194 and then flows back into the compressor 110 via the gas-liquid separator 160. This configuration allows a portion of the high-temperature refrigerant discharged from the compressor 110 to expand and re-enter the compressor 110, thereby increasing the overall temperature and pressure of the refrigerant before compression. Thus, if the refrigerant with increased temperature and pressure flows into the compressor 110, the temperature and pressure on the discharge side of the pressure-enthalpy (Ph) diagram will increase during compression in the compressor 110, thereby improving the heating capacity and efficiency of the thermal management system 2. This hot-gas mode configuration utilizes the compressor 110 to enhance heating performance, allowing for maximum heating without activating the PTC heater when the external air temperature is low. That is, the hot-gas mode is entered when the external air temperature is low, corresponding to a high initial heating load, and then deactivated when heating can be achieved through the normal heating mode.

[0121] Figure 11 A vehicle thermal management system 3, another embodiment of the present invention, is shown in schematic form.

[0122] and Figure 1Unlike the thermal management system 1 of the embodiment, the thermal management system 3 of this embodiment also includes a fourth refrigerant line 104 in the refrigerant circulation line 100. The following description focuses on the differences.

[0123] The fourth refrigerant line 104 is configured to divert the refrigerant flowing through the indoor unit 130 to bypass the outdoor unit 140, and may be equipped with a first valve 195.

[0124] One end of the fourth refrigerant line 103 can be connected to the first refrigerant line 101 at the front end of the inlet side of the outdoor unit 140, and the other end can be connected to the first refrigerant line 101 at the rear end of the outlet side of the outdoor unit 140.

[0125] A second valve 196 may be installed between the front end of the inlet side of the outdoor unit 140 and the branch point of the fourth refrigerant line 104. In addition, a check valve 197 may be installed between the rear end of the outlet side of the outdoor unit 140 and the branch point of the fourth refrigerant line 104.

[0126] In this embodiment, the first valve 195 and the second valve 196 may be automatic shut-off valves (ASVs) without expansion function. The check valve 197 prevents refrigerant from flowing back to the outdoor unit 140 along the fourth refrigerant line 104 and bypassing the outdoor unit 140.

[0127] The fourth refrigerant line 104 can be used as a bypass line to prevent frost formation on the outdoor unit 140 as the refrigerant flows through it. That is, it allows the refrigerant to bypass the outdoor unit 140, thereby preventing frost formation on the outdoor unit 140 due to the refrigerant.

[0128] In addition, in electric vehicles, in order to ensure aerodynamic performance, when the active air valve is closed at a certain speed or under specific conditions, the air flowing into the outdoor unit 140 is blocked. Therefore, in order to reduce drag, the refrigerant can bypass the outdoor unit 140.

[0129] In heating mode, the refrigerant in the first refrigerant line 101 is discharged from the compressor 110 and flows through the heat exchanger 120 without exchanging heat with the cooling water, then moves to the indoor unit 130 and exchanges heat with the air inside the air conditioning unit 300. Thus, heating can be performed.

[0130] The refrigerant expands by flowing through the first expansion valve 191, then moves along the fourth refrigerant line 104 around the outdoor unit 140 with the first valve 195 open and the second valve 196 closed. After passing through the internal heat exchanger 180 and with the second expansion valve 192 closed, it flows along the second refrigerant line 102, through the fully open third expansion valve 193 and the cooler 170, before flowing back along the first refrigerant line 101 through the gas-liquid separator 160 and the internal heat exchanger 180 to the compressor 110. At this time, the refrigerant can exchange heat (absorb heat) with the cooling water in the second cooling water line 202 in the cooler 170. This movement of the refrigerant is the same as in the second or third heating mode, therefore detailed descriptions are omitted.

[0131] Figure 12 A vehicle thermal management system 4, another embodiment of the present invention, is shown in schematic form.

[0132] and Figure 1 Unlike the thermal management system 1 of the embodiment, the thermal management system 4 of this embodiment also includes a fifth refrigerant line 105 in the refrigerant circulation line 100. The following description focuses on the differences.

[0133] The fifth refrigerant line 105 is configured to allow the refrigerant flowing through the indoor unit 130 to be diverted and move around the outdoor unit 140 and the internal heat exchanger 180, and may be equipped with a first valve 195.

[0134] One end of the fifth refrigerant line 105 can be connected to the first refrigerant line 101 between the first expansion valve 191 and the outdoor unit 140, and the other end can be connected to the second refrigerant line 102 between the cooler 170 and the third expansion valve 193. Furthermore, a second valve 196 can be installed between the inlet front end of the outdoor unit 140 and the branch point of the fifth refrigerant line 105.

[0135] The first valve 195 and the second valve 196 can be automatic shut-off valves (ASVs) without expansion function.

[0136] The fifth refrigerant line 105 can be used as a bypass line to prevent frost formation during the refrigerant flow through the outdoor unit 140. That is, it allows the refrigerant to bypass the outdoor unit 140 and the internal heat exchanger 180, thereby preventing frost formation on the outdoor unit 140 due to refrigerant.

[0137] In heating mode, the refrigerant in the first refrigerant line 101 is discharged from the compressor 110 and flows through the heat exchanger 120 without exchanging heat with the cooling water, then moves to the indoor unit 130 and exchanges heat with the air inside the air conditioning unit 300. Thus, heating can be performed.

[0138] The refrigerant expands by flowing through the first expansion valve 191, and then, with the first valve 195 open and the second valve 196 closed, it moves along the fifth refrigerant line 105, bypassing the outdoor unit 140 and the internal heat exchanger 180, towards the second refrigerant line 102. With the third expansion valve 193 closed, it flows through the cooler 170 and then back along the first refrigerant line 101, passing through the gas-liquid separator 160 and the internal heat exchanger 180 before flowing into the compressor 110. At this time, the refrigerant can exchange heat (absorb heat) with the cooling water in the second cooling water line 202 in the cooler 170. However, only the refrigerant flowing through the gas-liquid separator 160 flows through the internal heat exchanger 180; therefore, no heat exchange occurs between refrigerants in the internal heat exchanger 180.

[0139] Figure 13 A vehicle thermal management system 5, another embodiment of the present invention, is shown in schematic form.

[0140] In this embodiment, the thermal management system 5 has a connection structure with the fifth refrigerant line 105. Figure 12 The thermal management system 4 shown in the embodiment differs from this one. The following description focuses on the differences.

[0141] The fifth refrigerant line 105 is configured to divert the refrigerant flowing through the indoor unit 130 to bypass the outdoor unit 140 and the internal heat exchanger 180, and may be equipped with a first valve 195. The first valve 195 may be an automatic shut-off valve (ASV) without expansion function.

[0142] One end of the fifth refrigerant line 105 can be connected to the first refrigerant line 101 between the indoor unit 130 and the first expansion valve 191, and the other end can be connected to the second refrigerant line 102 at the inlet side of the third expansion valve 193. Furthermore, a check valve 197 can be configured between the branch point of the second refrigerant line 102 and the first refrigerant line 101 and the branch point of the second refrigerant line 102 and the fifth refrigerant line 105. Such a check valve 197 prevents refrigerant moving along the fifth refrigerant line 105 towards the second refrigerant line 102 from flowing back towards the outdoor unit 140 and becoming stagnant.

[0143] In heating mode, the refrigerant in the first refrigerant line 101 is discharged from the compressor 110 and flows through the heat exchanger 120 without exchanging heat with the cooling water, then moves to the indoor unit 130 and exchanges heat with the air inside the air conditioning unit 300. Thus, heating can be performed.

[0144] With the first expansion valve 191 closed and the first valve 195 open, the refrigerant moves along the fifth refrigerant line 105, bypassing the outdoor unit 140 and the internal heat exchanger 180, towards the second refrigerant line 102. In the second refrigerant line 102, it expands by passing through the third expansion valve 193, then flows through the cooler 170, and finally along the first refrigerant line 101, passing through the gas-liquid separator 160 and the internal heat exchanger 180 before flowing into the compressor 110. At this time, the refrigerant can exchange heat (absorb heat) with the cooling water in the second cooling water line 202 in the cooler 170. However, only the refrigerant flowing through the gas-liquid separator 160 flows through the internal heat exchanger 180; therefore, no heat exchange occurs between refrigerants in the internal heat exchanger 180.

[0145] Figure 14 and Figure 15 Show Figure 13 A variation of the vehicle thermal management system 5' shown in the embodiment.

[0146] Referring to the attached diagram, the fifth refrigerant line 105 is configured to divert the refrigerant flowing through the indoor unit 130, bypassing the outdoor unit 140 and the internal heat exchanger 180, and may be equipped with a fifth expansion valve 198. The fifth expansion valve 198 may be a fully open electronic two-way expansion valve.

[0147] In heating mode, the refrigerant in the first refrigerant line 101 is discharged from the compressor 110 and flows through the heat exchanger 120 without exchanging heat with the cooling water, then moves to the indoor unit 130 and exchanges heat with the air inside the air conditioning unit 300. Thus, heating can be performed.

[0148] With the first expansion valve 191 closed, the refrigerant flows through the fifth expansion valve 198 and expands. It then travels along the fifth refrigerant line 105, bypassing the outdoor unit 140 and the internal heat exchanger 180, and moves to the second refrigerant line 102. In the second refrigerant line 102, it flows through the fully open third expansion valve and the cooler 170, and then along the first refrigerant line 101, passing through the gas-liquid separator 160 and the internal heat exchanger 180 before flowing into the compressor 110. At this time, the refrigerant can exchange heat (absorb heat) with the cooling water in the second cooling water line 202 in the cooler 170. Furthermore, only the refrigerant flowing through the gas-liquid separator 160 flows through the internal heat exchanger 180; therefore, no heat exchange occurs between refrigerants in the internal heat exchanger 180.

[0149] On the other hand, such as Figure 15 As shown, a check valve 197 may be selectively installed between the branch point of the second refrigerant line 102 and the branch point of the fifth refrigerant line 105. Such a check valve 197 can prevent refrigerant from flowing back and stagnating towards the outdoor unit 140.

[0150] The present invention has been described above with reference to embodiments; however, those skilled in the art can modify and alter the invention in various ways without departing from the spirit and scope of the invention as set forth in the claims. Furthermore, all differences associated with such modifications and alterations are included within the scope of the invention as defined in the appended claims.

Claims

1. A vehicle thermal management system, characterized in that, It includes: The refrigerant circulation pipeline allows the refrigerant to flow sequentially through the compressor and the indoor unit. and Cooling water circulation piping, which supplies cooling water for movement. In the aforementioned refrigerant circulation pipeline, a heat exchanger connected to the aforementioned cooling water circulation pipeline is arranged between the aforementioned compressor and the aforementioned indoor unit, so that the refrigerant that exchanges heat with the aforementioned cooling water flows into the aforementioned indoor unit.

2. The vehicle thermal management system according to claim 1, characterized in that, The heat exchanger and the compressor are integrated into one unit.

3. The vehicle thermal management system according to claim 1, characterized in that, The above-mentioned refrigerant circulation pipeline includes: The first refrigerant pipeline is equipped with a first expansion valve, an outdoor unit, a second expansion valve, an evaporator, and a gas-liquid separator through which the refrigerant flowing through the indoor unit passes in sequence; and The second refrigerant line allows the refrigerant flowing through the outdoor unit to bypass the second expansion valve and the evaporator.

4. The vehicle thermal management system according to claim 3, characterized in that, A third expansion valve and a cooler are installed in the second refrigerant pipeline.

5. The vehicle thermal management system according to claim 3, characterized in that, One end of the second refrigerant line is connected to the first refrigerant line between the outdoor unit and the second expansion valve, and the other end is connected to the first refrigerant line between the evaporator and the gas-liquid separator.

6. The vehicle thermal management system according to claim 3, characterized in that, It also includes: The third refrigerant line has one end connected to the first refrigerant line at the inlet side of the indoor unit, and the other end connected to the first refrigerant line at the inlet side of the gas-liquid separator. A fourth expansion valve is installed in the aforementioned third refrigerant line.

7. The vehicle thermal management system according to claim 3, characterized in that, It also includes: An internal heat exchanger is provided in the first refrigerant line, and the refrigerant flowing through the outdoor unit exchanges heat with the refrigerant flowing through the gas-liquid separator toward the compressor.

8. The vehicle thermal management system according to claim 3, characterized in that, The indoor unit and the evaporator are located inside the air conditioning unit, and a temperature regulating door is provided between the indoor unit and the evaporator.

9. The vehicle thermal management system according to claim 4, characterized in that, The aforementioned cooling water circulation pipeline includes: The first cooling water pipeline circulates cooling water through the electrical components and is equipped with a radiator. The second cooling water pipeline circulates the cooling water flowing through the battery and is equipped with a heater. A cooling water valve that selectively connects to the first cooling water pipe and the second cooling water pipe; A cooling water distribution pipe, one end of which is connected to the second cooling water pipe at the front end of the battery inlet side via the aforementioned cooling water valve, and the other end of which is connected to the second cooling water pipe at the rear end of the battery outlet side; and The cooling water connection pipe has one end connected to the first cooling water pipe at the rear end of the outlet side of the aforementioned electrical component, and the other end connected to the second cooling water pipe at the rear end of the outlet side of the aforementioned battery.

10. The vehicle thermal management system according to claim 9, characterized in that, The first cooling water pipe is connected to the heat exchanger, and the second cooling water pipe is connected to the cooler.

11. The vehicle thermal management system according to claim 10, characterized in that, In the first cooling mode, The first cooling water pipeline described above forms an independent cooling water circulation loop, so that the cooling water in the first cooling water pipeline flows through the heat exchanger, while no cooling water flows in the second cooling water pipeline. The refrigerant in the first refrigerant line is discharged from the compressor, flows through the heat exchanger, exchanges heat with the cooling water in the first cooling water line, and then moves to the indoor unit. With the third expansion valve closed, it flows through the first expansion valve, the outdoor unit, the second expansion valve, the evaporator, and the gas-liquid separator before flowing into the compressor.

12. The vehicle thermal management system according to claim 10, characterized in that, In the second cooling mode, The first cooling water pipeline and the second cooling water pipeline respectively form independent cooling water circulation loops. The cooling water in the first cooling water pipeline flows through the heat exchanger, and the cooling water in the second cooling water pipeline flows through the cooler. The refrigerant in the first refrigerant line is discharged from the compressor, flows through the heat exchanger, and exchanges heat with the cooling water in the first cooling water line before moving to the indoor unit. A portion of the refrigerant flowing through the first expansion valve and the outdoor unit flows along the second refrigerant line, through the third expansion valve and the cooler, and exchanges heat with the cooling water in the second cooling water line before passing through the gas-liquid separator and flowing into the compressor. The remaining portion of the refrigerant flows along the first refrigerant line, through the second expansion valve, the evaporator, and the gas-liquid separator before flowing into the compressor.

13. The vehicle thermal management system according to claim 10, characterized in that, In the first heating mode No cooling water flows in the aforementioned cooling water circulation pipeline. The refrigerant in the first refrigerant line is discharged from the compressor and flows through the heat exchanger, the indoor unit, the first expansion valve and the outdoor unit. With the second expansion valve closed, the refrigerant flows along the second refrigerant line through the third expansion valve and the cooler, and then through the gas-liquid separator before flowing into the compressor.

14. The vehicle thermal management system according to claim 10, characterized in that, In the second heating mode, The cooling water flowing through the electrical components in the first cooling water pipe moves along the cooling water connection pipe to the second cooling water pipe. After flowing through the cooler in the second cooling water pipe, the cooling water moves from the cooling water valve back to the first cooling water pipe. The refrigerant in the first refrigerant pipeline is discharged from the compressor and flows through the heat exchanger, the indoor unit, the first expansion valve and the outdoor unit. With the second expansion valve closed, the refrigerant flows along the second refrigerant pipeline through the third expansion valve and the cooler, where it exchanges heat with the cooling water in the second cooling water pipeline. After passing through the gas-liquid separator, it flows into the compressor.

15. The vehicle thermal management system according to claim 10, characterized in that, In the third heating mode The cooling water flowing through the electrical components in the first cooling water pipe moves along the cooling water connection pipe to the second cooling water pipe, then passes through the cooler and moves from the cooling water valve back to the first cooling water pipe. The cooling water flowing through the battery in the second cooling water pipe moves along the cooling water diversion pipe from the cooling water valve back to the second cooling water pipe. The refrigerant in the first refrigerant pipeline is discharged from the compressor and flows through the heat exchanger, the indoor unit, the first expansion valve and the outdoor unit. With the second expansion valve closed, the refrigerant flows along the second refrigerant pipeline through the third expansion valve and the cooler, where it exchanges heat with the cooling water in the second cooling water pipeline. After passing through the gas-liquid separator, it flows into the compressor.

16. The vehicle thermal management system according to claim 4, characterized in that, The aforementioned refrigerant circulation pipeline also includes a fourth refrigerant pipeline, which diverts the refrigerant flowing through the indoor unit to bypass the outdoor unit. One end of the fourth refrigerant line is connected to the first refrigerant line at the front end of the inlet side of the outdoor unit, and the other end is connected to the first refrigerant line at the rear end of the outlet side of the outdoor unit. A first valve is installed in the fourth refrigerant line, and a second valve is installed between the inlet front end of the outdoor unit and the branch point of the fourth refrigerant line. In heating mode, the refrigerant in the first refrigerant line is discharged from the compressor, passes through the heat exchanger and the indoor unit, and expands by flowing through the first expansion valve. With the first valve open and the second valve closed, it moves along the fourth refrigerant line around the outdoor unit. With the second expansion valve closed, it flows along the second refrigerant line through the third expansion valve and the cooler, and then flows into the compressor through the gas-liquid separator.

17. The vehicle thermal management system according to claim 4, characterized in that, The aforementioned refrigerant circulation pipeline also includes a fifth refrigerant pipeline, which diverts the refrigerant flowing through the indoor unit to bypass the outdoor unit. One end of the fifth refrigerant line is connected to the first refrigerant line between the first expansion valve and the outdoor unit, and the other end is connected to the second refrigerant line between the cooler and the third expansion valve. A first valve is installed in the fifth refrigerant line, and a second valve is installed between the inlet front end of the outdoor unit and the branch point of the fifth refrigerant line. In heating mode, the refrigerant in the first refrigerant line is discharged from the compressor and flows through the heat exchanger and the indoor unit, and expands through the first expansion valve. With the first valve open and the second valve closed, it moves along the fifth refrigerant line, bypasses the outdoor unit, and moves towards the second refrigerant line. With the third expansion valve closed, it flows through the cooler, passes through the gas-liquid separator, and flows into the compressor.

18. The vehicle thermal management system according to claim 4, characterized in that, The aforementioned refrigerant circulation pipeline also includes a fifth refrigerant pipeline, which diverts the refrigerant flowing through the indoor unit to bypass the outdoor unit. One end of the fifth refrigerant line is connected to the first refrigerant line between the indoor unit and the first expansion valve, and the other end is connected to the second refrigerant line at the inlet side of the third expansion valve. A first valve is installed in the aforementioned fifth refrigerant line. In heating mode, the refrigerant in the first refrigerant line is discharged from the compressor and flows through the heat exchanger and the indoor unit. With the first expansion valve closed and the first valve open, it moves along the fifth refrigerant line, bypasses the outdoor unit, and moves towards the second refrigerant line. After expanding through the third expansion valve, it passes through the cooler and the gas-liquid separator and flows into the compressor.

19. The vehicle thermal management system according to claim 4, characterized in that, The aforementioned refrigerant circulation pipeline also includes a fifth refrigerant pipeline, which diverts the refrigerant flowing through the indoor unit to bypass the outdoor unit. One end of the fifth refrigerant line is connected to the first refrigerant line between the indoor unit and the first expansion valve, and the other end is connected to the second refrigerant line at the inlet side of the third expansion valve. A fifth expansion valve is installed in the aforementioned fifth refrigerant line. In heating mode, the refrigerant in the first refrigerant line is discharged from the compressor and flows through the heat exchanger and the indoor unit. With the first expansion valve closed, it flows through the fifth expansion valve and expands. Then, it moves along the fifth refrigerant line, bypasses the outdoor unit, and moves to the second refrigerant line. After passing through the third expansion valve and the cooler, it flows through the gas-liquid separator and into the compressor.

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