Vehicle thermal management system and vehicle

Abstract

A vehicle thermal management system (100). The vehicle thermal management system comprises an engine system heat exchange loop (71), an electric drive system heat exchange loop (72), an air conditioner heat pump heat exchange loop (73), and a first heat exchanger (4); the first heat exchanger comprises a first chamber (81), a second chamber (82), and a third chamber (83); the first chamber is communicated with the engine system heat exchange loop; the second chamber is communicated with the electric drive system heat exchange loop; the third chamber is communicated with the air conditioner heat pump heat exchange loop; and the second chamber is located between the first chamber and the third chamber. The system can improve the heat exchange efficiency. Also disclosed is a vehicle comprising the vehicle thermal management system.

Description

Vehicle thermal management system and vehicle

[0001] This application claims priority to the Chinese patent application filed on July 31, 2023, with application number CN202310957868.X and title “Whole vehicle thermal management system and vehicle,” the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of thermal management technology, and in particular to a whole vehicle thermal management system and a vehicle. Background Art

[0003] The exhaust gas discharged by existing engines has a high temperature, which is not conducive to recycling and utilization, and has low thermal management efficiency.

[0004] Summary of the Invention

[0005] The Summary of the Invention introduces a series of simplified concepts that will be further described in the Detailed Description of the Invention. The Summary of the Invention of this application is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] According to a first aspect of the present application, a vehicle thermal management system is provided, the vehicle thermal management system comprising:

[0007] Engine system heat exchange circuit;

[0008] Heat exchange circuit of electric drive system;

[0009] Air conditioning heat pump heat exchange circuit; and

[0010] A first heat exchanger, wherein the first heat exchanger comprises:

[0011] a first chamber, the first chamber being in communication with the engine system heat exchange circuit,

[0012] a second chamber, the second chamber being in communication with the electric drive system heat exchange circuit, and

[0013] The third chamber is connected to the heat exchange circuit of the air conditioner heat pump,

[0014] Wherein, the second chamber is located between the first chamber and the third chamber.

[0015] Optionally, the vehicle thermal management system is configured such that the flow directions of the cooling fluid in adjacent chambers among the first chamber, the second chamber and the third chamber are opposite.

[0016] Optionally, the first chamber, the second chamber and the third chamber are alternately provided with inlets and outlets on the same side, so that the flow directions of the cooling fluids in adjacent chambers are opposite.

[0017] Optionally, the inlet of the first chamber, the outlet of the second chamber and the inlet of the third chamber are located on the same side, and the outlet of the first chamber, the inlet of the second chamber and the outlet of the third chamber are located on the same side.

[0018] Optionally, when the vehicle thermal management system is in working state, the temperature ranges of adjacent chambers in the first chamber, the second chamber and the third chamber are different, and the temperature ranges of the first chamber, the second chamber and the third chamber are in a stepped relationship in sequence.

[0019] Optionally, the first temperature corresponds to the first chamber, the second temperature corresponds to the second chamber, and the third temperature corresponds to the third chamber; the temperature range corresponding to the first temperature is: 80-100°C, the temperature range corresponding to the second temperature is: 40-65°C, and the temperature range corresponding to the third temperature is: 10-35°C.

[0020] Optionally, the engine system heat exchange circuit includes an engine cooling heat exchange circuit and an engine intake and exhaust heat exchange circuit.

[0021] The vehicle thermal management system further includes a second heat exchanger, which includes:

[0022] a fourth chamber, the fourth chamber being in communication with the engine intake and exhaust heat exchange circuit, and

[0023] The fifth chamber is connected to the engine cooling heat exchange circuit,

[0024] In which, the first chamber is also connected to the engine intake and exhaust heat exchange circuit, and the vehicle thermal management system is constructed so that the cooling fluid in the engine intake and exhaust heat exchange circuit first flows through the fourth chamber and then flows through the first chamber, so as to cool condensation in advance through the first heat exchanger and the second heat exchanger.

[0025] Optionally, the vehicle thermal management system further includes an exhaust port, and the first heat exchanger, the second heat exchanger and the exhaust port are arranged tilted in sequence so that the condensed water cooled in advance is discharged through the exhaust port.

[0026] Optionally, the vehicle thermal management system further includes a water-cooled intercooler, and the water-cooled intercooler includes:

[0027] a sixth chamber, the sixth chamber being in communication with the engine system heat exchange circuit and the first chamber, and

[0028] The seventh chamber, the seventh chamber, the electric drive system heat exchange circuit and the second chamber are connected,

[0029] Among them, the vehicle thermal management system is constructed so that the cooling fluid in the engine system heat exchange circuit first flows through the first chamber and then flows through the sixth chamber, and is cooled by the first heat exchanger and the water-cooled intercooler.

[0030] Optionally, the vehicle thermal management system is configured such that the flow directions of the cooling fluid in the sixth chamber and the seventh chamber are opposite.

[0031] Optionally, the inlet of the sixth chamber is located on the first side of the water-cooled intercooler, and the inlet of the seventh chamber is located on the second side of the water-cooled intercooler;

[0032] An outlet of the sixth chamber is located at the second side of the water-cooled intercooler, and an outlet of the seventh chamber is located at the first side of the water-cooled intercooler.

[0033] Optionally, the electric drive system heat exchange circuit and the air conditioning heat pump heat exchange circuit can exchange heat through the second chamber and the third chamber, and the air conditioning heat pump heat exchange circuit can use the heat exchanged to heat the passenger compartment.

[0034] Optionally, the air-conditioning heat pump heat exchange circuit can use the heat exchanged to heat the battery.

[0035] Optionally, the vehicle thermal management system further includes a third heat exchanger, which is connected to the air-conditioning heat pump heat exchange circuit and is used for heat exchange with the outside.

[0036] Optionally, when the vehicle thermal management system is in the first working state, the electric drive system heat exchange circuit and the air conditioning heat pump heat exchange circuit perform heat exchange through the first heat exchanger.

[0037] Optionally, when the vehicle thermal management system is in the second working state, the engine system heat exchange circuit and the electric drive system heat exchange circuit perform heat exchange through the first heat exchanger, and after the heat exchange, the electric drive system heat exchange circuit and the air conditioning heat pump heat exchange circuit perform heat exchange through the first heat exchanger.

[0038] The present application also provides a vehicle, which includes the above-mentioned vehicle thermal management system. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The following drawings of this application are hereby incorporated as part of this application for understanding this application. The drawings show the embodiments of this application and their descriptions, and are used to explain the devices and principles of this application. In the drawings,

[0040] FIG1 is a schematic structural diagram of a vehicle thermal management system according to a preferred embodiment of the present application;

[0041] FIG2 is a schematic diagram of the working principle of the vehicle thermal management system shown in FIG1 under the first working condition, wherein the motor and the condenser are working;

[0042] FIG3 is a schematic diagram of the working principle of the vehicle thermal management system shown in FIG1 under the second working condition, wherein the motor is working, the heat exchange circuit of the engine system is working, and the condenser is working;

[0043] FIG4 is a schematic diagram of the working principle of the vehicle thermal management system shown in FIG1 under the third working condition, wherein the motor and the evaporator are working;

[0044] FIG5 is a schematic diagram of the working principle of the vehicle thermal management system shown in FIG1 under the fourth working condition, wherein the motor is working, the engine system heat exchange circuit is working, and the evaporator is working; and

[0045] FIG6 is a schematic diagram of the working principle of the vehicle thermal management system shown in FIG1 under the fifth working condition, wherein the condenser is working and the evaporator is working.

[0046] Explanation of the reference numerals: 11: Engine cylinder 12: Three-way catalytic converter 13: Second heat exchanger 14: First heat exchanger 15: Air side three-way valve 16: Air filter 17: Turbocharger 18: Water-cooled intercooler 19: Engine throttle 21: Second water pump 22: First water side three-way valve 23: Engine water jacket assembly 24: Electronic thermostat 25: High temperature radiator 26: Heating device 27: First water tank 28: Second water side three-way valve 29: First four-way valve 31: First water pump 32: Third water side three-way valve 33: First electronic three-way valve 34: Motor 35: Second electronic three-way valve 36: Low temperature radiator 37: Second water tank 38: Fourth water side three-way valve 39: Fifth water side three-way valve 40: Second four-way valve 41: Air conditioning compressor 42: Refrigerant four-way valve 43: First refrigerant three Valve 44: First electromagnetic control valve 45: Third heat exchanger 46: First drying device 47: First electronic expansion valve 48: Battery 49: Second refrigerant three-way valve 50: Third four-way valve 52: Third refrigerant three-way valve 53: Fourth four-way valve 54: Fifth four-way valve 55: Sixth four-way valve 56: Second electronic control valve 57: Third electronic control valve 58: Fourth electronic control valve 59: Fifth electronic control valve 60: Condenser 61: Evaporator 62: Second drying device 63: Second electronic expansion valve 64: Third electronic expansion valve 71: Engine system heat exchange circuit 72: Electric drive system heat exchange circuit 73: Air conditioning heat pump heat exchange circuit 74: Engine intake and exhaust heat exchange circuit 75: Engine cooling heat exchange circuit 81: First chamber 82: Second chamber 83: Third chamber84: Fourth chamber 85: Fifth chamber 86: Sixth chamber 87: Seventh chamber 91: Exhaust port 92: First bypass water channel 93: Second bypass water channel 100: Vehicle thermal management system DETAILED DESCRIPTION

[0047] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present application. However, it will be apparent to those skilled in the art that the present application can be implemented without one or more of these details. In other examples, some technical features well known in the art are not described in order to avoid confusion with the present application.

[0048] To thoroughly understand this application, a detailed structure will be presented in the following description to illustrate this application. Obviously, the implementation of this application is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this application are described in detail below. However, in addition to these detailed descriptions, this application may also have other embodiments and should not be construed as being limited to the embodiments set forth herein.

[0049] It should be understood that the purpose of the terms used herein is only to describe specific embodiments and is not intended to limit the present application. The singular forms "a", "an" and "said / the" are also intended to include the plural forms, unless the context clearly indicates otherwise. When the terms "comprise" and / or "include" are used in this specification, they indicate the presence of the features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof. The terms "upper", "lower", "front", "back", "left", "right" and similar expressions used in this application are for illustrative purposes only and are not limiting.

[0050] Ordinal numbers such as “first” and “second” cited in this application are merely identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term “first component” itself does not imply the existence of a “second component”, and the term “second component” itself does not imply the existence of a “first component”.

[0051] Hereinafter, specific embodiments of the present application will be described in more detail with reference to the accompanying drawings. These drawings illustrate representative embodiments of the present application and do not limit the present application.

[0052] FIG1 shows a schematic structural diagram of a vehicle thermal management system 100 according to a preferred embodiment of the present application.

[0053] The vehicle thermal management system 100 includes an engine system heat exchange circuit 71, which is used to generate kinetic energy through combustion. In particular, the kinetic energy generated by combustion in the engine system heat exchange circuit 71 can drive the vehicle.

[0054] The engine system heat exchange circuit 71 discharges the first cooling fluid during the combustion process. The engine system heat exchange circuit 71 includes an exhaust port 91 , through which the first cooling fluid is discharged.

[0055] The first cooling fluid is the exhaust gas discharged from the engine cylinder 11 .

[0056] The vehicle thermal management system 100 may further include an air filter 16 and a turbocharger 17. The turbocharger 17 is arranged downstream of the engine system heat exchange circuit 71. The engine system heat exchange circuit 71 utilizes the inertial force of the discharged first cooling fluid to drive the turbine of the turbocharger 17. The turbine drives the coaxial impeller, which pressurizes the air delivered through the pipe from the air filter 16 and causes it to enter the engine cylinder 11 at a higher pressure.

[0057] The vehicle thermal management system 100 also includes the motor 34 and an electric drive system heat exchange circuit 72 , which exchanges heat with the motor 34. The heat exchange management method for the motor 34 includes a second cooling fluid to lower or raise the temperature of the motor 34. Specifically, the electric drive system heat exchange circuit 72 includes a second cooling fluid. This second cooling fluid is a coolant.

[0058] The vehicle thermal management system 100 also includes an air conditioning heat pump heat exchange circuit 73, which is used to regulate the temperature within the passenger compartment. The air conditioning heat pump heat exchange circuit 73 forms a heat pump air conditioning system. The air conditioning heat pump heat exchange circuit 73 includes an air conditioning compressor 41, an evaporator 61, and a condenser 60. The air conditioning compressor 41, the evaporator 61, and the condenser 60 are interconnected. The air conditioning compressor 41 can produce a third cooling fluid, which serves as the air conditioning refrigerant. The third cooling fluid can flow through the air conditioning heat pump heat exchange circuit 73 to the evaporator 61, exchanging heat with the air flowing through the evaporator 61, thereby lowering the air temperature. The third cooling fluid can also flow through the air conditioning heat pump heat exchange circuit 73 to the condenser 60, exchanging heat with the air flowing through the condenser 60, thereby raising the temperature of the condenser 60.

[0059] To improve the utilization rate of the vehicle thermal management system, the vehicle thermal management system 100 also includes a first heat exchanger 14. The first heat exchanger 14 includes three chambers: a first chamber 81, a second chamber 82, and a third chamber 83. The first chamber 81, the second chamber 82, and the third chamber 83 are not connected to each other. The first heat exchanger 14 is a plate heat exchanger. Preferably, the first heat exchanger 14 is a double-plate heat exchanger. The first chamber 81 is connected to the engine system heat exchange circuit 71, and the first cooling fluid discharged from the engine system heat exchange circuit 71 can enter the first chamber 81. The second chamber 82 is connected to the electric drive system heat exchange circuit 72, and the second cooling fluid in the electric drive system heat exchange circuit 72 can enter the second chamber 82. The third chamber 83 is connected to the air conditioning heat pump heat exchange circuit 73, and the third cooling fluid in the air conditioning heat pump heat exchange circuit 73 can enter the third chamber 83.

[0060] The first cooling fluid, the second cooling fluid, and the third cooling fluid can exchange heat in the first heat exchanger 14. Specifically, the second chamber 82 is located between the first chamber 81 and the third chamber 83. The second chamber 82 is located between the first chamber 81 and the third chamber 83 in a direction perpendicular to the flow direction of the fluid. The second cooling fluid in the second chamber 82 is located between the first cooling fluid in the first chamber 81 and the third cooling fluid in the third chamber 83. The second cooling fluid in the second chamber 82 directly exchanges heat with the first cooling fluid in the first chamber 81. The second cooling fluid in the second chamber 82 directly exchanges heat with the third cooling fluid in the third chamber 83. The first chamber 81 and the third chamber 83 are separated by the second chamber 82. The first chamber 81 and the third chamber 83 are not adjacent to each other. The first fluid in the first chamber 81 and the third cooling fluid in the third chamber 83 do not directly exchange heat.

[0061] The chambers have inlets and outlets. The first heat exchanger 14 has three inlets and three outlets. The first chamber 81 has a first inlet and a first outlet. The first cooling fluid enters the first chamber 81 through the first inlet and is discharged through the first outlet. The second chamber 82 has a second inlet and a second outlet. The second cooling fluid enters the second chamber 82 through the second inlet and is discharged through the second outlet. The third chamber 83 has a third inlet and a third outlet. The third cooling fluid enters the third chamber 83 through the third inlet and is discharged through the third outlet.

[0062] Furthermore, the fluids in two adjacent chambers of the three chambers flow in opposite directions. The cooling fluids in adjacent chambers of the first chamber 81, the second chamber 82, and the third chamber 83 flow in opposite directions, thereby improving heat exchange efficiency.

[0063] The first chamber 81 and the second chamber 82 are adjacent to each other. The flow direction of the first cooling fluid in the first chamber 81 is opposite to the flow direction of the second cooling fluid in the second chamber 82. The first cooling fluid in the first chamber 81 flows from the first inlet to the first outlet. The second cooling fluid in the second chamber 82 flows from the second inlet to the second outlet. The first inlet and the second inlet are respectively located on both sides of the first heat exchanger 14, for example, on opposite sides. The first inlet and the second inlet are respectively located on both sides of the first heat exchanger 14 along the flow direction of the fluid. The first outlet and the second outlet are respectively located on both sides of the first heat exchanger 14, for example, on opposite sides. The first outlet and the second outlet are respectively located on both sides of the first heat exchanger 14 along the flow direction of the fluid. In this embodiment, "opposite" refers to the surfaces of the first heat exchanger 14 facing opposite directions.

[0064] The third chamber 83 is adjacent to the second chamber 82. The flow direction of the third cooling fluid in the third chamber 83 is opposite to the flow direction of the second cooling fluid in the second chamber 82. The third cooling fluid in the third chamber 83 flows from the third inlet to the third outlet. The flow direction of the first cooling fluid in the first chamber 81 is the same as the flow direction of the third cooling fluid in the third chamber 83. The third inlet and the second inlet are located on opposite sides of the first heat exchanger 14, respectively. The third inlet and the second inlet are located on opposite sides of the first heat exchanger 14 along the flow direction of the fluid. The third outlet and the second outlet are located on opposite sides of the first heat exchanger 14, respectively. The third outlet and the second outlet are located on opposite sides of the first heat exchanger 14, respectively. Thus, the flow direction of the first cooling fluid in the first heat exchanger 14 is the same as the flow direction of the third cooling fluid.

[0065] The first chamber 81, the second chamber 82, and the third chamber 83 are arranged with inlets and outlets alternately arranged on the same side, so that the cooling fluid flows in opposite directions in adjacent chambers. The first inlet, the second outlet, and the third inlet are arranged sequentially on the same side. The first outlet, the second inlet, and the third outlet are arranged sequentially on the other side. Thus, the cooling fluid flows in opposite directions in adjacent chambers. That is, the first inlet of the first chamber 81, the second outlet of the second chamber 82, and the third inlet of the third chamber 83 are located on the same side of the first heat exchanger 14. The first outlet of the first chamber 81, the second inlet of the second chamber 82, and the third outlet of the third chamber 83 are located on the same side of the first heat exchanger 14.

[0066] According to the present application, the vehicle thermal management system 100 includes an engine system heat exchange circuit 71, an electric drive system heat exchange circuit 72, an air conditioning heat pump heat exchange circuit 73, and a first heat exchanger 14. The first heat exchanger 14 includes three chambers: a first chamber 81, a second chamber 82, and a third chamber 83. The first chamber 81 is connected to the engine system heat exchange circuit 71. The second chamber 82 is connected to the electric drive system heat exchange circuit 72. The third chamber 83 is connected to the air conditioning heat pump heat exchange circuit 73. The second chamber 82 is located between the first chamber 81 and the third chamber 83, that is, the first chamber 81 and the third chamber 83 are separated. As a result, the engine system heat exchange circuit 71, the electric drive system heat exchange circuit 72, and the air conditioning heat pump heat exchange circuit 73 share the first heat exchanger 14. Heat from the first chamber 81 is first transferred to the second chamber 82, and then transferred to the third chamber 83 through the second chamber 82. The first chamber 81 and the third chamber 83 do not exchange heat directly, so that the heat discharged from the engine system heat exchange circuit 71 is first transferred to the electric drive system heat exchange circuit 72, and then transferred to the air conditioning heat pump heat exchange circuit 73, avoiding the air conditioning heat pump heat exchange circuit 73 directly exchanging heat with the heat discharged from the engine system heat exchange circuit 71 to generate overpressure.

[0067] Furthermore, when the vehicle thermal management system 100 is in operation, the adjacent temperature ranges in the first chamber 81, the second chamber 82, and the third chamber 83 are different. The temperature range in the first chamber 81 is higher than the temperature range in the second chamber 82. The temperature range in the second chamber 82 is higher than the temperature range in the third chamber 83. The temperature ranges of the first chamber 81, the second chamber 82, and the third chamber 83 are sequentially stepped. As a result, the temperature ranges of adjacent chambers in the first chamber 81, the second chamber 82, and the third chamber 83 are stepped, which can be used for heat exchange while avoiding thermal buffering.

[0068] For example, the temperature of the first cooling fluid > the temperature of the second cooling fluid > the temperature of the third cooling fluid. The second cooling fluid in the second chamber 82 first absorbs heat from the first cooling fluid in the first chamber 81, causing the first cooling fluid in the first chamber 81 to cool down while the second cooling fluid in the second chamber 82 to heat up. Consequently, the temperature of the first cooling fluid discharged from the first chamber 81 is lower than the temperature of the first cooling fluid entering the first chamber 81, while the temperature of the second cooling fluid discharged from the second chamber 82 is higher than the temperature of the second cooling fluid entering the second chamber 82. This allows the temperature of the first cooling fluid in the first chamber 81 to drop below the condensation temperature, facilitating the precipitation of a large amount of condensed water from the first cooling fluid.

[0069] The heated second cooling fluid exchanges heat with the third cooling fluid in the third chamber 83. The third cooling fluid in the third chamber 83 absorbs heat from the heated second cooling fluid in the second chamber 82. The second cooling fluid in the second chamber 82 cools down again, while the third cooling fluid in the third chamber 83 heats up. Consequently, the temperature of the third cooling fluid exiting the third chamber 83 is higher than that of the third cooling fluid entering the third chamber 83. This gradually reduces the temperature of the first cooling fluid within the first heat exchanger 14, reducing the pressure differential during heat exchange and making it less likely that the third cooling fluid will become overpressurized during heat exchange.

[0070] The first temperature corresponds to the first chamber, the second temperature corresponds to the second chamber, and the third temperature corresponds to the third chamber. For example, the temperature range corresponding to the first temperature is 80-100°C, the temperature range corresponding to the second temperature is 40-65°C, and the temperature range corresponding to the third temperature is 10-35°C. In this way, the second cooling fluid absorbs the temperature of the first cooling fluid, reducing the difference between the temperature of the second cooling fluid and the temperature of the first cooling fluid. The third cooling fluid absorbs the temperature of the second cooling fluid, reducing the difference between the temperature of the third cooling fluid and the temperature of the second cooling fluid. The temperature difference between the second cooling fluid and the first cooling fluid is smaller than the temperature difference between the third cooling fluid and the first cooling fluid. In this way, the temperature of the first cooling fluid decreases step by step in the first heat exchanger 14, reducing the pressure difference during heat exchange, and the third cooling fluid is less likely to cause overpressure during heat exchange.

[0071] To improve the cooling efficiency of the first cooling fluid, the vehicle thermal management system 100 also includes a second heat exchanger 13, which can be a cooler. The second heat exchanger 13 is located upstream of the first heat exchanger 14 along the flow direction of the first cooling fluid. The second heat exchanger 13 first exchanges heat with the first cooling fluid, and the heat-exchanged first cooling fluid then enters the first heat exchanger 14. For example, the second heat exchanger 13 first lowers the temperature of the first cooling fluid, and the lowered temperature first cooling fluid then enters the first heat exchanger 14.

[0072] The engine system heat exchange circuit 71 also includes an engine cooling heat exchange circuit 75 and an engine intake and exhaust heat exchange circuit 74. A fourth cooling fluid is provided in the engine cooling heat exchange circuit 75. The temperature of the fourth cooling fluid is lower than that of the first cooling fluid. The first cooling fluid exchanges heat with the fourth cooling fluid in the second heat exchanger 13. The first cooling fluid discharged from the second heat exchanger 13 can enter the first heat exchanger 14.

[0073] Specifically, the second heat exchanger 13 includes a fourth chamber 84 and a fifth chamber 85, which are not connected to each other. The first cooling fluid and the fourth cooling fluid can exchange heat in the second heat exchanger 13. Specifically, the fourth chamber 84 is adjacent to the fifth chamber 85. The fourth chamber 84, the engine intake and exhaust heat exchange circuit 74, and the first heat exchanger 14 are connected. The first chamber 81 is connected to the engine intake and exhaust heat exchange circuit 74. Preferably, the fourth chamber 84 connects the engine intake and exhaust heat exchange circuit 74 and the first chamber 14. The first cooling fluid in the engine intake and exhaust heat exchange circuit 74 first flows through the fourth chamber 84 and then through the first chamber 81. It is cooled by the second heat exchanger 13 and the first heat exchanger 14, resulting in premature cooling and condensation. The first cooling fluid discharged from the fourth chamber 84 can enter the first chamber 81. The fifth chamber 85 is connected to the engine cooling heat exchange circuit 75, and the fourth cooling fluid in the engine cooling heat exchange circuit 75 can enter the fifth chamber.

[0074] The second heat exchanger 13 is located upstream of the first heat exchanger 14 along the flow direction of the first cooling fluid. The first cooling fluid in the fourth chamber 84 directly exchanges heat with the fourth cooling fluid in the fifth chamber 85. The first cooling fluid discharged from the engine intake and exhaust heat exchange circuit 74 first flows through the second heat exchanger 13 to exchange heat with the fourth cooling fluid in the second heat exchanger 13. The cooled first cooling fluid discharged from the second heat exchanger 13 then exchanges heat with the second cooling fluid in the first heat exchanger 14. This allows the first cooling fluid to undergo multiple heat exchanges, improving its utilization rate.

[0075] The engine intake and exhaust heat exchange circuit 74 includes the engine cylinder 11, three-way catalytic converter 12, air-side three-way valve 15, air filter 16, turbocharger 17, and engine throttle 19. The engine cylinder 11, three-way catalytic converter 12, second heat exchanger 13, first heat exchanger 14, air-side three-way valve 15, air filter 16, turbocharger 17, water-cooled intercooler 18, and engine throttle 19 are all connected in sequence via air-side connecting pipes. After the first cooling fluid exhausted from the engine cylinder 11 passes through the three-way catalytic converter 12, a portion of the first cooling fluid is discharged to the exterior of the vehicle, while the remaining portion enters the second heat exchanger 13. The second heat exchanger 13 and the first chamber 81 of the first heat exchanger 14 are connected in series. The outlets of the air filter 16 and the first chamber 81 of the first heat exchanger 14 are connected in parallel to the turbocharger 17.

[0076] The engine cooling and heat exchange circuit 75 includes a second water pump 21, a first water-side three-way valve 22, an engine water jacket assembly 23, an electronic thermostat 24, a high-temperature radiator 25, a heating device 26, a first water tank 27, a second water-side three-way valve 28, and a first four-way valve 29. The first water tank 27 stores a fourth cooling fluid. In the direction of the fourth cooling fluid's flow, the first water tank 27 sequentially connects the second water pump 21, the first water-side three-way valve 22, the parallel engine water jacket assembly 23 and the second heat exchanger 13, the second water-side three-way valve 28, the electronic thermostat 24, the parallel high-temperature radiator 25, and the heating device 26. The fourth cooling fluid discharged from the first water-side three-way valve 22 flows into the engine water jacket assembly 23 and the second heat exchanger 13, respectively. The fourth cooling fluid discharged from the engine water jacket assembly 23 and the second heat exchanger 13, respectively, flows into the second water-side three-way valve 28. The fourth cooling fluid discharged from the electronic thermostat 24 enters the high-temperature radiator 25 and the heating device 26, respectively. The fourth cooling fluid discharged from the high-temperature radiator 25 and the heating device 26 then enters the first four-way valve 29 through its two inlets. The two outlets of the first four-way valve 29 communicate with the first water tank 27 and the second water pump 21.

[0077] To further reduce the temperature of the first cooling fluid returning to the engine system heat exchange circuit 71, the vehicle thermal management system 100 further includes a water-cooled intercooler 18, which is arranged between the first heat exchanger 14 and the engine system heat exchange circuit 71 (specifically, the engine intake and exhaust heat exchange circuit 74). The water-cooled intercooler 18 can reduce the temperature of the first cooling fluid from the first heat exchanger 14.

[0078] The water-cooled intercooler 18 includes a sixth chamber 86 and a seventh chamber 87 . The sixth chamber 86 and the seventh chamber 87 are not in communication with each other. The sixth chamber 86 and the seventh chamber 87 are adjacent to each other.

[0079] The sixth chamber 86 is connected to the first heat exchanger 14, so that the first cooling fluid discharged from the first heat exchanger 14 can enter the sixth chamber 86. Specifically, the first chamber 81, the sixth chamber 86 and the engine intake and exhaust heat exchange circuit 74 are connected. The first cooling fluid in the engine intake and exhaust heat exchange circuit 74 first flows through the first chamber 81, then flows through the sixth chamber 86, and is cooled by the first heat exchanger 14 and the water-cooled intercooler 18. The first cooling fluid discharged from the sixth chamber 86 flows back to the engine intake and exhaust heat exchange circuit 74. This can improve combustion efficiency. The water-cooled intercooler 18 can further reduce the temperature of the first cooling fluid to ensure that the mixed gas is within the optimal temperature range.

[0080] The seventh chamber 87 is connected to the electric drive system heat exchange circuit 72, allowing the second cooling fluid in the electric drive system heat exchange circuit 72 to enter the seventh chamber 87. The seventh chamber 87 is also connected to the first heat exchanger 14, allowing the second cooling fluid discharged from the seventh chamber 87 to flow into the first heat exchanger 14. Specifically, the electric drive system heat exchange circuit 72, the seventh chamber 87, and the second chamber 82 are connected. The second cooling fluid in the electric drive system heat exchange circuit 72 can first flow through the water-cooled intercooler 18 and then flow into the first heat exchanger 14. The first cooling fluid and the second cooling fluid can exchange heat in the water-cooled intercooler 18.

[0081] The water-cooled intercooler 18 is located downstream of the first heat exchanger 14 along the flow direction of the first cooling fluid. The water-cooled intercooler 18 is located upstream of the first heat exchanger 14 along the flow direction of the second cooling fluid. The flow directions of the cooling fluids in the sixth chamber 86 and the seventh chamber 87 are opposite. The flow direction of the first cooling fluid in the sixth chamber 86 is opposite to the flow direction of the second cooling fluid in the seventh chamber 87. This can improve the heat exchange efficiency. The first cooling fluid in the sixth chamber 86 and the second cooling fluid in the seventh chamber 87 directly exchange heat. As a result, the first heat exchanger 14 can reduce the condensed water generated by the cooling of the compressed air through the water-cooled intercooler 18, and has a good anti-corrosion effect on the metal materials of the water-cooled intercooler 18.

[0082] The first cooling fluid discharged from the engine system heat exchange circuit 71 (specifically, the engine intake and exhaust heat exchange circuit 74) first flows through the first heat exchanger 14 to exchange heat with the second cooling fluid in the first heat exchanger 14. The cooled first cooling fluid discharged from the first heat exchanger 14 then exchanges heat with the second cooling fluid in the water-cooled intercooler 18, thereby further reducing the temperature of the first cooling fluid. The cooled first cooling fluid then flows back into the engine system heat exchange circuit 71.

[0083] It can be understood that the water-cooled intercooler 18 is located upstream of the first heat exchanger 14 along the flow direction of the second cooling fluid, and the temperature of the second cooling fluid in the water-cooled intercooler 18 is lower than the temperature of the second cooling fluid in the first heat exchanger 14. The second cooling fluid in the electric drive system heat exchange circuit 72 first flows through the water-cooled intercooler 18 to exchange heat with the first cooling fluid in the water-cooled intercooler 18. The heated second cooling fluid discharged from the water-cooled intercooler 18 then exchanges heat with the first cooling fluid in the first heat exchanger 14, thereby increasing the temperature of the second cooling fluid again. The second cooling fluid that has been heated again flows back to the electric drive system heat exchange circuit 72. The electric drive system heat exchange circuit 72 can absorb both the waste heat of the motor 34 and the heat of the first cooling fluid after turbocharging.

[0084] For example, the temperature of the first cooling fluid discharged from the engine system heat exchange circuit 71 is T1, the temperature of the first cooling fluid discharged from the first heat exchanger 14 is T2, and the temperature of the first cooling fluid discharged from the water-cooled intercooler 18 is T3. The first cooling fluid flows through the first heat exchanger 14 and the water-cooled intercooler 18 along the flow direction of the first cooling fluid, gradually decreasing in temperature. The temperature of the second cooling fluid in the electric drive system heat exchange circuit 72 is T4, the temperature of the second cooling fluid discharged from the water-cooled intercooler 18 is T5, and the temperature of the second cooling fluid discharged from the first heat exchanger 14 is T6. The second cooling fluid flows through the water-cooled intercooler 18 and the first heat exchanger 14 along the flow direction of the second cooling fluid, gradually increasing in temperature. T1>T2>T3, T4<T5<T6. T1>T5, T2>T4.

[0085] To ensure efficient heat exchange, the channel has an inlet and an outlet. The water-cooled intercooler 18 has two inlets and two outlets. The inlet of the sixth chamber 86 is the fourth inlet and is located on the first side of the water-cooled intercooler 18. The inlet of the seventh chamber 87 is the fifth inlet and is located on the second side of the water-cooled intercooler 18. The outlet of the sixth chamber 86 is the fourth outlet and is located on the second side of the water-cooled intercooler 18. The outlet of the seventh chamber 87 is the fifth outlet and is located on the first side of the water-cooled intercooler 18.

[0086] The first cooling fluid enters the sixth chamber 86 through the fourth inlet and is discharged from the sixth chamber 86 through the fourth outlet. The sixth chamber 86 is in communication with the first chamber 81. The first outlet is in communication with the fourth inlet. The fourth outlet is in communication with the air intake of the engine system heat exchange circuit 71. The first cooling fluid discharged from the first outlet enters the sixth chamber through the fourth inlet.

[0087] The second cooling fluid enters the seventh chamber 87 through the fifth inlet and is discharged through the fifth outlet. The fifth outlet is connected to the second inlet. The fifth inlet is connected to the electric drive system heat exchange circuit 72. The second cooling fluid discharged from the fifth outlet enters the second chamber 86 through the second inlet, thereby improving heat exchange efficiency.

[0088] The sixth chamber 86 and the seventh chamber 87 are adjacent to each other. The fourth inlet of the sixth chamber 86 and the fifth inlet of the seventh chamber 87 are located on either side of the water-cooled intercooler 18, respectively. The fourth inlet of the sixth chamber 86 and the fifth inlet of the seventh chamber 87 are located on either side of the water-cooled intercooler 18 along the flow direction of the fluid. The fourth outlet of the sixth chamber 86 and the fifth outlet of the seventh chamber 87 are located on either side of the water-cooled intercooler 18, respectively. The fourth outlet of the sixth chamber 86 and the fifth outlet of the seventh chamber 87 are located on either side of the water-cooled intercooler 18, respectively, along the flow direction of the fluid.

[0089] The first cooling fluid in the sixth chamber 86 flows in an opposite direction to the second cooling fluid in the seventh chamber 87. The first cooling fluid in the sixth chamber 86 flows from the fourth inlet to the fourth outlet. The second cooling fluid in the seventh chamber 87 flows from the fifth inlet to the fifth outlet. The fourth and fifth inlets are located on opposite sides of the water-cooled intercooler 18. The fourth and fifth outlets are located on opposite sides of the water-cooled intercooler 18.

[0090] The first cooling fluid is cooled in the first heat exchanger 14, causing moisture in the cooled first cooling fluid to condense and precipitate. The condensed water is then discharged from the first heat exchanger 14. The vehicle thermal management system 100 also includes an exhaust port 91, which transports the first cooling fluid to the first chamber 81. Condensed water is weakly acidic and can corrode metals. To facilitate condensed water discharge, the first heat exchanger 14 is positioned above the engine system heat exchange circuit 71 along the engine's height. The second heat exchanger 13 is positioned above the first heat exchanger 14 along the engine's height. The first heat exchanger 14, the second heat exchanger 13, and the exhaust port 91 are arranged in a tilted arrangement, allowing any condensed water to be discharged through the exhaust port 91. The exhaust port 91 extends downwardly and tilted along the engine's height, allowing condensed water generated by the first heat exchanger 14 to be discharged through the exhaust port 91 under gravity. This removes moisture from the first cooling fluid before it enters the first chamber 81, thereby preemptively dehumidifying the fluid.

[0091] To effectively regulate the temperature of the third cooling fluid in the air conditioning heat pump heat exchange circuit 73, the vehicle thermal management system 100 also includes a third heat exchanger 45, which is connected to the air conditioning heat pump heat exchange circuit 73. The third heat exchanger 45 can also be considered part of the air conditioning heat pump heat exchange circuit 73. The third heat exchanger 45 is used to exchange heat with the outside world. The third heat exchanger 45 is connected in parallel with the first heat exchanger 14. The third heat exchanger 45 can assist or replace the first heat exchanger 14 to ensure that the temperature of the second cooling fluid in the air conditioning heat pump heat exchange circuit 73 can be regulated. The third cooling fluid flows through the third heat exchanger 45. The third heat exchanger 45 enables the third cooling fluid to exchange heat with the outside air to regulate the temperature of the third cooling fluid. This enables multiple heat exchanges, improving the heat exchange efficiency of the air conditioning heat pump heat exchange circuit 73.

[0092] The electric drive system heat exchange circuit 72 also includes a first water pump 31, a third water-side three-way valve 32, a first electronic three-way valve 33, a motor 34, a second electronic three-way valve 35, a low-temperature radiator 36, a second water tank 37, a fourth water-side three-way valve 38, a fifth water-side three-way valve 39, and a second four-way valve 40. The second water tank 37 stores a second cooling fluid. The second water tank 37 is sequentially connected to the first water pump 31, the third water-side three-way valve 32, the motor 34 (in parallel), and the water-cooled intercooler 18, in the direction of the second cooling fluid's flow. The second cooling fluid discharged from the third water-side three-way valve 32 flows to the motor 34 and the water-cooled intercooler 18, respectively. The water-cooled intercooler 18 is located upstream of the first heat exchanger 14 in the direction of the second cooling fluid's flow.

[0093] The second chamber 82 of the first heat exchanger 14 is also connected in parallel to the first bypass water channel 92. The second cooling fluid discharged from the water-cooled intercooler 18 enters the second chamber 82 of the first heat exchanger 14 and the first bypass water channel 92, respectively. The second cooling fluid discharged from the second chamber 82 of the first heat exchanger 14 and the first bypass water channel 92 both flow to the first electronic three-way valve 33. The first electronic three-way valve 33, the fifth water-side three-way valve 39, and the second electronic three-way valve 35 are connected in series. The motor 34 is connected in series with the fifth water-side three-way valve 39. The second cooling fluid discharged from the motor 34 enters the fifth water-side three-way valve 39 and then flows to the second electronic three-way valve 35.

[0094] The low-temperature radiator 36 is located downstream of the second electronic three-way valve 35 along the flow direction of the second cooling fluid. The low-temperature radiator 36 is also connected in parallel with the second bypass water channel 93. The second cooling fluid discharged from the second electronic three-way valve 35 flows into the low-temperature radiator 36 or the second bypass water channel 93. The second cooling fluid discharged from the low-temperature radiator 36 or the second bypass water channel 93 flows into the second four-way valve 40. The three inlets of the second four-way valve 40 are connected to the second water tank 37, the low-temperature radiator 36, and the second bypass water channel 93, respectively. One outlet of the second four-way valve 40 is connected to the first water pump 31.

[0095] The electric drive system heat exchange circuit 72 and the air conditioning heat pump heat exchange circuit 73 can exchange heat through the second chamber 82 and the third chamber 83, and the air conditioning heat pump heat exchange circuit 73 can use the heat exchanged to heat the passenger compartment. In this way, the first heat exchanger 14 can be used for both heat exchange and waste heat recycling to heat the passenger compartment. The second cooling fluid in the electric drive system heat exchange circuit 72 enters the second chamber 82. The third chamber 83 is connected to the air conditioning heat pump heat exchange circuit 73. The third cooling fluid in the air conditioning heat pump heat exchange circuit 73 enters the third chamber 83. The second cooling fluid in the second chamber 82 exchanges heat with the third cooling fluid in the third chamber 83. The air conditioning heat pump heat exchange circuit 73 can use the heat exchanged to heat the passenger compartment.

[0096] The air conditioning heat pump heat exchange circuit 73 includes an air conditioning compressor 41, a refrigerant four-way valve 42, a first refrigerant three-way valve 43, a first solenoid-controlled valve 44, a third heat exchanger 45, a first drying device 46, a first electronic expansion valve 47, a battery 48, a second refrigerant three-way valve 49, a third four-way valve 50, a third refrigerant three-way valve 52, a fourth four-way valve 53, a fifth four-way valve 54, a sixth four-way valve 55, a second electronic control valve 56, a third electronic control valve 57, a fourth electronic control valve 58, a fifth electronic control valve 59, a condenser 60, an evaporator 61, a second drying device 62, a second electronic expansion valve 63, and a third electronic expansion valve 64. Battery 48 is a power battery that can power the vehicle. The electronic expansion valve acts as adiabatic throttling. Both the first drying device 46 and the second drying device 62 are configured as liquid storage and drying cylinders.

[0097] The air conditioning compressor 41 is capable of generating a third cooling fluid. The exhaust port of the air conditioning compressor 41 is sequentially connected to the refrigerant four-way valve 42 and the first refrigerant three-way valve 43. The third heat exchanger 45 is connected in parallel with the third chamber 83 of the first heat exchanger 14. The third cooling fluid discharged from the first refrigerant three-way valve 43 enters either the third heat exchanger 45 or the third chamber 83 of the first heat exchanger 14. The third chamber 83 of the first heat exchanger 14 is connected in series with the first solenoid control valve 44. The second cooling fluid discharged from the first solenoid control valve 44 and the third heat exchanger 45 flows to the third four-way valve 50.

[0098] The first drying device 46 and the second drying device 62 are connected in parallel. The first drying device 46 is connected in series with the first electronic expansion valve 47. The second drying device 62 is connected in series with the second electronic expansion valve 63. The second cooling fluid discharged from the third four-way valve 50 flows to the first drying device 46 and the second drying device 62, respectively. The third cooling fluid discharged from the first electronic expansion valve 47 and the second electronic expansion valve 63 both flows to the third refrigerant three-way valve 52. The third refrigerant three-way valve 52 is connected in series with the fourth four-way valve 53. The fourth four-way valve 53 is also connected to the condenser 60, the battery 48, and the evaporator 61.

[0099] The condenser 60, battery 48, and evaporator 61 are connected in parallel. The third cooling fluid from the fourth four-way valve 53 flows into the condenser 60, battery 48, and evaporator 61, respectively, or the third cooling fluid in the condenser 60, battery 48, and evaporator 61 all flow into the fourth four-way valve 53. The condenser 60 is connected in series with the third electronic expansion valve 64, which controls the flow of the third cooling fluid through the condenser 60. The battery 48 is connected in series with the second electronic control valve 56, which controls the flow of the third cooling fluid through the battery 48. The third electronic control valve 57, evaporator 61, sixth four-way valve 55, and fourth electronic control valve 58 are connected in series, with the third electronic control valve 57 controlling the flow of the third cooling fluid through the evaporator 61. The fourth electronic control valve 58, battery 48, and condenser 60 are connected in parallel. The fourth electronic control valve 58, battery 48, and condenser 60 are each connected to the air conditioning compressor 41.

[0100] The vehicle thermal management system 100 of the present application is used in an EGR (Exhaust Gas Recirculation) system. The first cooling fluid discharged from the engine system heat exchange circuit 71 is exhaust gas. A first heat exchanger 14 is disposed between the second heat exchanger 13 and the turbocharger 17. The second heat exchanger 13 serves as a primary cooler, and the first heat exchanger 14 serves as a secondary cooler, thereby reducing the exhaust gas temperature and humidity in multiple stages. In particular, the first heat exchanger 14 can lower the exhaust gas temperature to below the condensation temperature, which facilitates the precipitation of a large amount of condensed water in the exhaust gas, thereby reducing the humidity of the mixed gas entering the turbocharger 17 and air filter 16. Ultimately, it can reduce the condensed water generated by the compressed air cooling through the water-cooled intercooler 18, improve the problem of condensation and icing after the intake air is compressed and intercooled in the engine system heat exchange circuit 71, reduce acid corrosion in the first cooling fluid, and provide good corrosion protection for the metal materials of the water-cooled intercooler 18.

[0101] The first heat exchanger 14 can realize multi-system heat interaction. Specifically, the first heat exchanger 14 can realize mutual heat transfer among the thermodynamic fluids in the exhaust gas, coolant and refrigerant. The first heat exchanger 14 can not only dehumidify the exhaust gas, but also realize heat interaction between the three systems of the electric drive system heat exchange circuit 72, the exhaust port 91 and the air conditioning heat pump heat exchange circuit 73. The electric drive system heat exchange circuit 72 utilizes the waste heat of the exhaust gas of the engine system heat exchange circuit 71, and the air conditioning heat pump heat exchange circuit 73 realizes heat interaction with the exhaust gas of the engine system heat exchange circuit 71 and the electric drive system heat exchange circuit 73 through the refrigerant. It is suitable for hybrid vehicles, and the heat interaction of the whole vehicle is more complex and comprehensive, which reduces the energy consumption of the whole vehicle.

[0102] Thus, the vehicle thermal management system 100 of this application improves the fuel economy of the turbocharged engine system heat exchange circuit and reduces knock issues. The OEM utilizes low-pressure EGR technology, and the intake air temperature of the engine system heat exchange circuit 71 is kept low, reducing condensation at the cold end of the intercooler system and preventing corrosion.

[0103] The vehicle thermal management system 100 is used in a vehicle, which may be a hybrid vehicle. A hybrid vehicle has a pure electric mode and a hybrid power mode. The following describes the operation of the vehicle thermal management system 100 in different environments.

[0104] FIG2 shows an operating condition of the vehicle thermal management system 100 in a pure electric mode suitable for use in a low-temperature environment.

[0105] In this operating condition, when the vehicle thermal management system 100 is in the first operating state, the vehicle's motor 34 is operating, and the engine system heat exchange circuit 71 is not operating. The electric drive system heat exchange circuit 72 and the air conditioning heat pump heat exchange circuit 73 exchange heat. The electric drive system heat exchange circuit 72 and the air conditioning heat pump heat exchange circuit 73 exchange heat through the first heat exchanger 14. The second cooling fluid in the second chamber 82 exchanges heat with the third cooling fluid in the third chamber 83. The waste heat of the motor 34 in the vehicle thermal management system 100 can be transferred to the air conditioning heat pump heat exchange circuit 73, which provides heat to the passenger compartment and battery 48.

[0106] Specifically, the second cooling fluid is discharged from the second water tank 37. The second cooling fluid flows through the first water pump 31 and the third water-side three-way valve 32. The second cooling fluid flowing out of the third water-side three-way valve 32 enters the motor 34 and the water-cooled intercooler 18, respectively. The second cooling fluid discharged from the water-cooled intercooler 18 flows into the second chamber 82 of the first heat exchanger 14. The second cooling fluid discharged from the second chamber 82 flows through the first electronic three-way valve 33 to the fifth water-side three-way valve 39. The second cooling fluid discharged from the motor 34 also flows to the fifth water-side three-way valve 39. The low-temperature radiator 36 is deactivated. The second cooling fluid discharged from the fifth water-side three-way valve 39 flows back through the second electronic three-way valve 35 and the second bypass water path 93 to the second four-way valve 40, and finally flows through the second four-way valve 40 to the first water pump 31.

[0107] The condenser 60 operates, while the evaporator 61 does not. The condenser 60 and the battery 48 are connected in parallel. The air conditioning compressor 41 discharges the third cooling fluid, and the refrigerant four-way valve 42 switches to heating mode. The third cooling fluid flows through the refrigerant four-way valve 42 to the fifth four-way valve 54. The third cooling fluid discharged from the fifth four-way valve 54 flows to the condenser 60 and the battery 48, respectively. The condenser 60 and the battery 48 are both located upstream of the third heat exchanger 45 in the direction of the third cooling fluid flow. The third cooling fluid can cool the battery 48. The third cooling fluid absorbs heat, while the battery 48 releases heat. The third cooling fluid in the condenser 60 exchanges heat with the outside air. The third cooling fluid releases heat, while the air absorbs heat, raising the air temperature. The heated air flows into the passenger compartment, thereby increasing the temperature inside the passenger compartment. The third cooling fluid discharged from the condenser 60 and the battery 48 flows to the fourth four-way valve 53. The third cooling fluid discharged from the fourth four-way valve 53 flows to the third refrigerant three-way valve 52.

[0108] The third refrigerant three-way valve 52 is connected in series with the second drying device 62. The third cooling fluid discharged from the third refrigerant three-way valve 52 is in a gas-liquid two-phase system. The second drying device 62 is capable of separating the third cooling fluid into a gas-liquid phase. The second drying device 62 discharges the third cooling fluid in a liquid phase. The third cooling fluid from the condenser 60 flows into the third heat exchanger 45 and the third chamber 83 of the first heat exchanger 14, respectively. The third cooling fluid exchanges heat with the outside air in the third heat exchanger 45. The air absorbs heat from the third cooling fluid in the third heat exchanger 45. The third cooling fluid also exchanges heat with the second cooling fluid in the first heat exchanger 14. The second cooling fluid absorbs heat from the third cooling fluid in the first heat exchanger 14. After absorbing heat, the second cooling fluid flows back to the first water pump 31. The third cooling fluid discharged from the first heat exchanger 14 and the third cooling fluid discharged from the third heat exchanger 45 both flow to the second refrigerant three-way valve 49. Finally, after releasing heat, the third cooling fluid flows back to the air conditioner compressor 41. The air-conditioning compressor 41 continues to perform the circulation function, so that the third cooling fluid after heat exchange in the third chamber 83 can flow to the condenser 60 and the battery 48 respectively.

[0109] FIG3 shows an operating condition of the vehicle thermal management system 100 in a hybrid mode suitable for use in a low-temperature environment.

[0110] In this operating condition, when the vehicle thermal management system 100 is in the second operating state, the engine system heat exchange circuit 71 and the electric drive system heat exchange circuit 72 exchange heat through the first heat exchanger 14. After the heat exchange, the electric drive system heat exchange circuit 72 and the air conditioning heat pump heat exchange circuit 73 also exchange heat through the first heat exchanger 14. Both the motor 34 and the engine system heat exchange circuit 71 are operating. Heat is exchanged between the electric drive system heat exchange circuit 72 and the air conditioning heat pump heat exchange circuit 73, allowing waste heat from the motor 34 to be transferred to the air conditioning heat pump heat exchange circuit 73, providing heat to the passenger compartment and power battery 48. The water side of the low-temperature radiator 36 is inoperative.

[0111] The engine system heat exchange circuit 71 discharges the first cooling fluid, which then flows through the second heat exchanger 13. In the second heat exchanger 13, the first cooling fluid exchanges heat with the fourth cooling fluid. The first cooling fluid is cooled, while the fourth cooling fluid is heated. The fourth cooling fluid from the second heat exchanger 13 can flow to the heating device 26. The heating device 26 absorbs the heat from the fourth cooling fluid and heats the outside air. The heated air can be delivered to the passenger compartment to warm it.

[0112] After the first cooling, the first cooling fluid flows into the first chamber 81 of the first heat exchanger 14. The first cooling fluid in the first chamber 81 exchanges heat with the second cooling fluid in the second chamber 82. The first cooling fluid undergoes a second cooling in the first heat exchanger 14. After the second cooling, the first cooling fluid flows into the water-cooled intercooler 18. There, the first cooling fluid undergoes a third cooling. After the third cooling, the first cooling fluid flows back into the engine system heat exchange circuit 71.

[0113] The flow process of the second cooling fluid in the electric drive system heat exchange circuit 72 in this working condition is similar to the flow process of the second cooling fluid in Figure 2, and the similarities will not be repeated. The difference is that the second cooling fluid undergoes heat exchange in the water-cooled intercooler 18. The second cooling fluid from the water-cooled intercooler 18 undergoes heat exchange with the first cooling fluid in the first heat exchanger 14, and the second cooling fluid from the water-cooled intercooler 18 undergoes heat exchange with the third cooling fluid in the first heat exchanger 14. The first cooling fluid in the first chamber 81 undergoes heat exchange with the second cooling fluid in the second chamber 82. The second cooling fluid in the second chamber 82 undergoes heat exchange with the third cooling fluid in the third chamber 83.

[0114] In the water-cooled intercooler 18, the first cooling fluid from the first heat exchanger 14 exchanges heat with the second cooling fluid in the electric drive system heat exchange circuit 72. The first cooling fluid undergoes a third cooling step in the water-cooled intercooler 18. The second cooling fluid undergoes a first heating step in the water-cooled intercooler 18. In the first heat exchanger 14, the first cooling fluid from the second heat exchanger 13 exchanges heat with the second cooling fluid from the water-cooled intercooler 18. The first cooling fluid undergoes a second cooling step in the first heat exchanger 14, while the second cooling fluid undergoes a second heating step in the first heat exchanger 14.

[0115] The flow process of the third cooling fluid in the air conditioning heat pump heat exchange circuit 73 in this operating condition is similar to the flow process of the third cooling fluid in Figure 2, and the similarities will not be repeated. The air conditioning compressor 41 discharges the third cooling fluid, and the refrigerant four-way valve 42 switches to the heating mode. The difference between the air conditioning heat pump heat exchange circuit 73 of the whole vehicle thermal management system 100 shown in Figure 3 and the air conditioning heat pump heat exchange circuit 73 of the whole vehicle thermal management system 100 shown in Figure 2 is that the third cooling fluid from the second drying device 62 flows into the first heat exchanger 14. The third cooling fluid exchanges heat with the second cooling fluid after heat exchange in the first heat exchanger 14.

[0116] In this way, the first heat exchanger 14 participates in the heat exchange between the electric drive system heat exchange circuit 72, the engine system heat exchange circuit 71 and the air conditioning heat pump heat exchange circuit 73. The water-cooled intercooler 18 participates in the cooling.

[0117] FIG4 shows an operating condition of the vehicle thermal management system 100 in a pure electric mode suitable for use in a high-temperature environment.

[0118] In this operating mode, motor 34 operates, engine system heat exchange circuit 71 is inoperative, and low-temperature radiator 36 operates. Motor 34 is cooled in electric drive system heat exchange circuit 72. No air flows between first heat exchanger 14 and water-cooled intercooler 18. Condenser 60 is inoperative. First heat exchanger 14 is disconnected from air conditioning heat pump heat exchange circuit 73.

[0119] The second cooling fluid is discharged from the second water tank 37. The second cooling fluid flows through the first water pump 31 and the third water-side three-way valve 32. The second cooling fluid flowing out of the third water-side three-way valve 32 enters the motor 34. The second cooling fluid discharged from the motor 34 flows to the fifth water-side three-way valve 39. The second cooling fluid discharged from the fifth water-side three-way valve 39 flows through the second electronic three-way valve 35 to the low-temperature radiator 36. The low-temperature radiator 36 reduces the temperature of the second cooling fluid from the motor 34. The second cooling fluid then flows back to the second four-way valve 40 and ultimately flows through the second four-way valve 40 to the first water pump 31.

[0120] Evaporator 61 operates, while condenser 60 does not operate. Evaporator 61 and battery 48 are connected in parallel. Air conditioning compressor 41 discharges the third cooling fluid. Refrigerant four-way valve 42 switches to cooling mode. The third cooling fluid flows through refrigerant four-way valve 42 to first refrigerant three-way valve 43. The third cooling fluid discharged from first refrigerant three-way valve 43 flows to third heat exchanger 45. The third cooling fluid exchanges heat with outside air in third heat exchanger 45. The air releases heat in third heat exchanger 45, lowering its temperature. The lowered temperature air then enters the passenger compartment to cool the passenger compartment.

[0121] The third heat exchanger 45 is connected in series with the first drying device 46. The third cooling fluid discharged from the third heat exchanger 45 is in a gas-liquid two-phase state. The first drying device 46 can separate the third cooling fluid into a gas-liquid state. The first drying device 46 discharges the third cooling fluid in a liquid phase.

[0122] The third heat exchanger 45 is located upstream of the evaporator 61 along the flow direction of the third cooling fluid. The third cooling fluid from the third heat exchanger 45 flows into the evaporator 61. The third cooling fluid in the evaporator 61 exchanges heat with the outside air. The third cooling fluid absorbs heat, while the air releases heat, lowering the air temperature. The cooled air then flows into the passenger compartment, thereby lowering the temperature within the passenger compartment.

[0123] The third heat exchanger 45 is located upstream of the battery 48 along the flow direction of the third cooling fluid. The third cooling fluid from the third heat exchanger 45 flows to the battery 48. The battery 48 exchanges heat with the third cooling fluid. The third cooling fluid absorbs heat, and the battery 48 releases heat, thereby reducing the temperature of the battery 48. The third cooling fluid discharged from the evaporator 61 and the battery 48 flows back to the air conditioner compressor 41. The air conditioner compressor 41 continues the circulation action, allowing the third cooling fluid from the evaporator 61 and the battery 48 to be recycled.

[0124] FIG5 shows an operating condition of the vehicle thermal management system 100 in a hybrid mode suitable for use in a high-temperature environment.

[0125] In this operating mode, motor 34 operates, engine system heat exchange circuit 71 is in operation, electric drive system heat exchange circuit 72 performs cooling, and air conditioning heat pump heat exchange circuit 73 performs cooling. Intake and exhaust flows through engine system heat exchange circuit 71. The first cooling fluid is cooled by second heat exchanger 13. First heat exchanger 14 only provides connectivity but does not participate in heat exchange.

[0126] The flow process of the first cooling fluid in this operating condition is similar to the flow process of the first cooling fluid in Figure 3 , and the similarities will not be repeated. The flow process of the second cooling fluid in this operating condition is similar to the flow process of the second cooling fluid in Figure 4 , and the similarities will not be repeated. The flow process of the third cooling fluid in this operating condition is similar to the flow process of the third cooling fluid in Figure 4 , and the similarities will not be repeated.

[0127] The difference is that high-temperature radiator 25 is operational, while heating device 26 is inoperative. The fourth cooling fluid exchanges heat with the first cooling fluid in second heat exchanger 13. In second heat exchanger 13, the fourth cooling fluid absorbs heat from the first cooling fluid, increasing its temperature. The heated fourth cooling fluid then enters high-temperature radiator 25. High-temperature radiator 25 reduces the heat content of the fourth cooling fluid and returns it to second water tank 37. Heating device 26 only provides water-side conduction and does not heat the passenger compartment.

[0128] The first cooling fluid exchanges heat with the fourth cooling fluid in the second heat exchanger 13. The first cooling fluid releases heat in the second heat exchanger 13 to cool down. The cooled first cooling fluid flows to the first heat exchanger 14 and then to the water-cooled intercooler 18. The first heat exchanger 14 does not exchange heat with the first cooling fluid. After compression and mixing by the turbocharger 17, the first cooling fluid exchanges heat with the second cooling fluid in the water-cooled intercooler 18. The first cooling fluid releases heat in the water-cooled intercooler 18 to cool down again. The second cooling fluid absorbs heat in the water-cooled intercooler 18 to heat up. The heated second cooling fluid passes through the first bypass water passage 92 directly into the first electronic three-way valve 33 and then flows to the low-temperature radiator 36. The heated second cooling fluid does not enter the first heat exchanger 14. The low-temperature radiator 36 cools down the second cooling fluid, which then flows back to the first water pump 31.

[0129] The air conditioner compressor 41 discharges the third cooling fluid. The refrigerant four-way valve 42 switches to cooling mode. The third heat exchanger 45 is located upstream of the evaporator 61 along the flow direction of the third cooling fluid. The third cooling fluid from the third heat exchanger 45 flows into the evaporator 61. The third cooling fluid in the evaporator 61 exchanges heat with the outside air. The third cooling fluid absorbs heat, while the air releases heat, lowering the air temperature. The cooled air then flows into the passenger compartment, thereby lowering the temperature within the passenger compartment.

[0130] The third heat exchanger 45 is located upstream of the battery 48 along the flow direction of the third cooling fluid. The third cooling fluid from the third heat exchanger 45 flows to the battery 48. The battery 48 exchanges heat with the third cooling fluid. The third cooling fluid absorbs heat, and the battery 48 releases heat, thereby reducing the temperature of the battery 48. The third cooling fluid discharged from the evaporator 61 and the battery 48 flows back to the air conditioner compressor 41. The air conditioner compressor 41 continues the circulation action, allowing the third cooling fluid from the evaporator 61 and the battery 48 to be recycled.

[0131] FIG6 shows an operating condition of the vehicle thermal management system 100 in a passenger compartment dehumidification mode suitable for use in a low-temperature environment.

[0132] In this operating condition, the engine system heat exchange circuit 71 and the motor 34 may be in an operating state or a non-operating state, and the motor 34 may be in a warm-up state or a heat dissipation state.

[0133] The air conditioning compressor 41 discharges the third cooling fluid. The refrigerant four-way valve 42 switches to dehumidification mode. No air flows between the third heat exchanger 45 and the first heat exchanger 14. The third cooling fluid discharged from the air conditioning compressor 41 flows first through the condenser 60 and then through the evaporator 61. The third cooling fluid discharged from the evaporator 61 flows back to the air conditioning compressor 41. The condenser 60 releases heat. The evaporator 61 absorbs heat and dehumidifies. The first drying device 46 is disconnected from the evaporator 61. The second drying device 62 is disconnected from the condenser 60.

[0134] The EGR (Exhaust Gas Recirculation) cooling flow path 71 of the vehicle thermal management system 100 of the present application does not directly exchange heat with the air conditioning heat pump heat exchange circuit 73. This prevents the high temperature of the EGR exhaust gas from causing overpressure of the refrigerant in the air conditioning heat pump heat exchange circuit 73.

[0135] The heat exchange sequence of the first heat exchanger 14 is: EGR flow path 71 (the EGR flow path is the bolded line in the figure, representing the gas line) → motor cooling water path 72 → air conditioner refrigerant flow path 73. Thus, heat from the EGR flow path 71 is first transferred to the motor cooling water path 72. This heat, combined with the waste heat from the motor 34, is then used to heat the air conditioner. While high EGR exhaust gas temperatures can lead to overpressure in the air conditioner refrigerant, this does not necessarily mean that the heat provided by the EGR exceeds the required heat for the refrigerant.

[0136] Furthermore, the EGR flow path 71 and the air conditioning refrigerant flow path 73 are oriented in the same direction, ensuring efficient heat exchange. The second cooling fluid in the motor cooling water path 72 can also undergo countercurrent heat exchange with the first cooling fluid in the water-cooled intercooler 18. This means that the motor cooling water path 72 absorbs both waste heat from the motor 34 and heat from the turbocharged intake air. The first heat exchanger 14 can also be used in both the motor cooling water path 72 and the air conditioning heat pump heat exchange circuit 73 in pure electric mode, thereby accommodating multiple operating modes.

[0137] Under low-temperature operating conditions, EGR exhaust gas undergoes heat exchange through first heat exchanger 14, allowing the heat absorbed by the second cooling fluid in first heat exchanger 14 to accelerate the warm-up of motor 34 and improve the operating efficiency of motor 34. The heated second cooling fluid can then transfer heat to the third cooling fluid in the air conditioning heat pump heat exchange circuit 73, providing the necessary heat for the passenger compartment and battery 48.

[0138] In the air conditioning heat pump heat exchange circuit 73, the refrigerant four-way valve 42 is used to switch between cooling, heating and dehumidification modes, which can reduce the use of electromagnetic switching valves. The first heat exchanger 14 and the third heat exchanger 45 dissipate heat to the outside in the air conditioning cooling mode. The first heat exchanger 14 is liquid-cooled and the third heat exchanger 45 is air-cooled. The first heat exchanger 14 and the third heat exchanger 45 absorb heat to the outside in the air conditioning heating mode. The first heat exchanger 14 absorbs the exhaust gas from the engine system heat exchange circuit 71 and the waste heat of the motor system. The third heat exchanger 45 absorbs the waste heat of the air (exhaust gas) from the engine system heat exchange circuit 71.

[0139] The first drying device 46 and the second drying device 62 are connected in parallel. In cooling mode, the first drying device 46 is in fluid communication with the evaporator 61. In cooling mode, the second drying device 62 is in fluid communication with the condenser 60. The third cooling fluid flows in opposite directions through the first drying device 46 and the second drying device 62, respectively. Sufficient gas-liquid separation in the first drying device 46 and the second drying device 62 improves the cooling and heating efficiency of the air conditioner (i.e., increases the COP of the air conditioner).

[0140] Under low-temperature conditions, the second heat exchanger 13 acts as a primary EGR cooler, reducing the EGR exhaust gas temperature while accelerating the warm-up of the motor 34 and providing heating for the passenger compartment. The first heat exchanger 14 acts as a secondary EGR cooler, lowering the exhaust gas temperature entering the turbocharger 17 and increasing the exhaust gas mass flow rate, thereby improving the EGR rate.

[0141] The first heat exchanger 14 facilitates heat exchange between multiple systems (the engine system heat exchange circuit 71, the electric drive system heat exchange circuit 72, and the air conditioning heat pump heat exchange circuit 73). It also provides a dehumidification function, reducing condensation at the cold end of the water-cooled intercooler 18, preventing condensation from clogging the intercooler 18 and causing acidic corrosion.

[0142] The present application also provides a vehicle, which includes the above-mentioned vehicle thermal management system 100.

[0143] The vehicle according to the present application includes the above-described vehicle thermal management system 100. The vehicle thermal management system 100 includes an engine system heat exchange circuit 71, an electric drive system heat exchange circuit 72, an air conditioning heat pump heat exchange circuit 73, and a first heat exchanger 14. The first heat exchanger 14 includes three chambers: a first chamber 81, a second chamber 82, and a third chamber 83. The first chamber 81 communicates with the engine system heat exchange circuit 71. The second chamber 82 communicates with the electric drive system heat exchange circuit 72. The third chamber 83 communicates with the air conditioning heat pump heat exchange circuit 73. The second chamber 82 is located between the first chamber 81 and the third chamber 83. Thus, the engine system heat exchange circuit 71, the electric drive system heat exchange circuit 72, and the air conditioning heat pump heat exchange circuit 73 share the first heat exchanger. The first chamber 81 and the third chamber 83 are separated, and heat from the first chamber 81 is first transferred to the second chamber 82, and then transferred to the third chamber 83 through the second chamber 82. The first chamber and the third chamber do not exchange heat directly, so that the heat discharged from the engine system heat exchange circuit 71 is first transferred to the electric drive system heat exchange circuit 72, and then transferred to the air conditioning heat pump heat exchange circuit 73, avoiding the air conditioning heat pump heat exchange circuit 73 directly exchanging heat with the heat discharged from the engine system heat exchange circuit 71 to generate overpressure.

[0144] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art in the technical field of this application. The terms used herein are only for describing specific implementation purposes and are not intended to limit this application. Terms such as "part" and "component" appearing in this article may refer to either a single part or a combination of multiple parts. Terms such as "installation" and "setting" appearing in this article may refer to either a component being directly attached to another component or a component being attached to another component through an intermediate component. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0145] This application has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are for the purpose of illustration and description only and are not intended to limit this application to the scope of the described embodiments. In addition, it will be understood by those skilled in the art that this application is not limited to the above-mentioned embodiments and that more variations and modifications can be made based on the teachings of this application, and these variations and modifications all fall within the scope of protection claimed in this application. The scope of protection of this application is defined by the appended claims and their equivalents.

Claims

1. A vehicle thermal management system (100), characterized in that: The vehicle thermal management system (100) comprises: Engine system heat exchange circuit (71); Electric drive system heat exchange circuit (72); Air conditioning heat pump heat exchange circuit (73); and A first heat exchanger (14), wherein the first heat exchanger (14) comprises: a first chamber (81), the first chamber (81) being in communication with the engine system heat exchange circuit (71), a second chamber (82), the second chamber (82) being in communication with the electric drive system heat exchange circuit (72), and a third chamber (83), the third chamber (83) being in communication with the air conditioning heat pump heat exchange circuit (73), Wherein, the second chamber (82) is located between the first chamber (81) and the third chamber (83).

2. The vehicle thermal management system (100) according to claim 1, characterized in that: The vehicle thermal management system (100) is configured such that the flow directions of the cooling fluid in adjacent chambers among the first chamber (81), the second chamber (82) and the third chamber (83) are opposite.

3. The vehicle thermal management system (100) according to claim 2, characterized in that: The first chamber (81), the second chamber (82) and the third chamber (83) are provided with inlets and outlets alternately arranged in sequence on the same side, so that the flow directions of the cooling fluid in adjacent chambers are opposite.

4. The vehicle thermal management system (100) according to claim 3, characterized in that: The inlet of the first chamber (81), the outlet of the second chamber (82) and the inlet of the third chamber (83) are located on the same side, and the outlet of the first chamber (81), the inlet of the second chamber (82) and the outlet of the third chamber (83) are located on the same side.

5. The vehicle thermal management system (100) according to any one of claims 1 to 4, characterized in that: When the vehicle thermal management system (100) is in operation, the temperature ranges of adjacent chambers among the first chamber (81), the second chamber (82) and the third chamber (83) are different, and the temperature ranges of the first chamber (81), the second chamber (82) and the third chamber (83) are in a stepped relationship.

6. The vehicle thermal management system (100) according to claim 5, characterized in that: The first temperature corresponds to the first chamber (81), the second temperature corresponds to the second chamber (82), and the third temperature corresponds to the third chamber (83); The temperature range corresponding to the first temperature is 80-100°C, the temperature range corresponding to the second temperature is 40-65°C, and the temperature range corresponding to the third temperature is 10-35°C.

7. The vehicle thermal management system (100) according to any one of claims 1 to 6, characterized in that: The engine system heat exchange circuit (71) comprises an engine cooling heat exchange circuit (75) and an engine intake and exhaust heat exchange circuit (74); The vehicle thermal management system (100) further comprises a second heat exchanger (13), wherein the second heat exchanger (13) comprises: a fourth chamber (84), the fourth chamber (84) being in communication with the engine intake and exhaust heat exchange circuit (74), and a fifth chamber (85), the fifth chamber (85) being in communication with the engine cooling heat exchange circuit (75), The first chamber (81) is also connected to the engine intake and exhaust heat exchange circuit (74), and the vehicle thermal management system (100) is constructed so that the cooling fluid in the engine intake and exhaust heat exchange circuit (74) first flows through the fourth chamber (84) and then flows through the first chamber (81), so as to cool condensation in advance through the first heat exchanger and the second heat exchanger.

8. The vehicle thermal management system (100) according to claim 7, characterized in that: The vehicle thermal management system (100) further comprises an exhaust port (91), wherein the first heat exchanger (14), the second heat exchanger (13) and the exhaust port (91) are arranged in an inclined manner in sequence, so that condensed water that is cooled in advance is discharged through the exhaust port (91).

9. The vehicle thermal management system (100) according to any one of claims 1 to 8, characterized in that: The vehicle thermal management system (100) further comprises a water-cooled intercooler (18), wherein the water-cooled intercooler (18) comprises: a sixth chamber (86), the sixth chamber (86), the engine system heat exchange circuit (71) and the first chamber (81) being in communication, and a seventh chamber (87), wherein the seventh chamber (87), the electric drive system heat exchange circuit (72) and the second chamber (82) are in communication with each other, The vehicle thermal management system (100) is configured such that the cooling fluid in the engine system heat exchange circuit (71) first flows through the first chamber (81) and then flows through the sixth chamber (86). The temperature is reduced by the first heat exchanger (14) and the water-cooled intercooler (18).

10. The vehicle thermal management system (100) according to claim 9, characterized in that: The vehicle thermal management system (100) is configured such that the flow directions of the cooling fluid in the sixth chamber (86) and the seventh chamber (87) are opposite.

11. The vehicle thermal management system (100) according to claim 10, characterized in that: The inlet of the sixth chamber (86) is located on a first side of the water-cooled intercooler (18), and the inlet of the seventh chamber (87) is located on a second side of the water-cooled intercooler (18); The outlet of the sixth chamber (86) is located on the second side of the water-cooled intercooler (18), and the outlet of the seventh chamber (87) is located on the first side of the water-cooled intercooler (18).

12. The vehicle thermal management system (100) according to any one of claims 1 to 11, characterized in that: The electric drive system heat exchange circuit (72) and the air conditioning heat pump heat exchange circuit (73) can exchange heat through the second chamber (82) and the third chamber (83), and the air conditioning heat pump heat exchange circuit (83) can use the heat exchanged to heat the passenger compartment.

13. The vehicle thermal management system (100) according to claim 12, characterized in that: The air conditioning heat pump heat exchange circuit (73) can use the heat exchanged to heat the battery (48).

14. The vehicle thermal management system (100) according to any one of claims 1 to 13, characterized in that: The vehicle thermal management system (100) further comprises a third heat exchanger (45), the third heat exchanger (45) being in communication with the air-conditioning heat pump heat exchange circuit (73), and the third heat exchanger (45) being used for heat exchange with the outside.

15. The vehicle thermal management system (100) according to any one of claims 1 to 14, characterized in that: When the whole vehicle thermal management system (100) is in a first working state, the electric drive system heat exchange circuit (72) and the air conditioning heat pump heat exchange circuit (73) perform heat exchange via the first heat exchanger (14).

16. The vehicle thermal management system (100) according to any one of claims 1 to 15, characterized in that: When the whole vehicle thermal management system (100) is in a second working state, the engine system heat exchange circuit (71) and the electric drive system heat exchange circuit (72) perform heat exchange through the first heat exchanger (14), and after the heat exchange, the electric drive system heat exchange circuit (72) and the air conditioning heat pump heat exchange circuit (73) perform heat exchange through the first heat exchanger (14).

17. A vehicle, characterized in that: The vehicle comprises a whole-vehicle thermal management system (100) according to any one of claims 1 to 16.

Images