New energy automobile thermal management system based on R290

Abstract

The utility model relates to a new energy automobile thermal management system based on R290. The new energy automobile thermal management system comprises a refrigerant module, a cooling liquid module and an air conditioner module. The refrigerant is liquefied in the condenser to release heat, and is gasified in the evaporator to absorb heat; and in the first cooling liquid loop, the first cooling liquid exchanges heat with the refrigerant for cooling in the evaporator, the second cooling liquid exchanges heat with the refrigerant for heating in the condenser, and the air conditioner module is configured to be selectively connected with the first cooling liquid loop and / or the second cooling liquid loop. Therefore, the refrigerant does not enter the passenger compartment, heat exchange between the refrigerant loop and the cooling liquid loop is achieved through the condenser and the evaporator, the refrigerating mode and the heating mode of the passenger compartment are achieved through the indirect heat pump system, and the working efficiency of the new energy automobile heat management system based on R290 is improved.

Description

Technical Field

[0001] This application relates to the field of new energy vehicle technology, specifically to a new energy vehicle thermal management system based on R290. Background Technology

[0002] Currently, with the increasing energy crisis and rising environmental protection requirements, the importance of energy conservation and emission reduction for environmental protection is constantly increasing. The use of traditional fuel vehicles is growing, leading to a continuous decline in urban air quality. In order to achieve energy conservation and emission reduction, more and more car owners are now choosing to buy new energy vehicles.

[0003] Heat pump air conditioning thermal management systems are crucial for the safety, comfort, and reliability of new energy vehicles. Currently, the commonly used refrigerant in thermal management systems is R134a (1,1,1,2-tetrafluoroethane), but this refrigerant is a hydrofluorocarbon with a high global warming potential (GWP), and its use will be gradually restricted. Therefore, research on clean and environmentally friendly refrigerants such as R744 (CO2) and R290 (propane) is a key focus of automotive heat pump air conditioning research. CO2 systems operate at very high pressures and exhibit transcritical states, resulting in low high-temperature cooling efficiency, requiring a restructuring of the industrial chain, high equipment investment costs, and a long development cycle. R290 refrigerant possesses good thermophysical properties and environmental performance, is compatible with existing systems, and is easier to develop; however, R290 is flammable. Therefore, a usable and highly safe R290 thermal management system needs to be designed. Utility Model Content

[0004] This application provides a new energy vehicle thermal management system based on R290, which can solve the technical problems of high global warming potential when using R134a as the refrigerant in current thermal management systems, and high system pressure, low high-temperature cooling efficiency, high equipment investment cost, and long development cycle when using R744 as the refrigerant.

[0005] This application provides a thermal management system for a new energy vehicle based on R290, comprising: a refrigerant module and a coolant module; the refrigerant module includes a condenser and an evaporator, a first inlet of the condenser for inputting refrigerant, a first outlet of the condenser connected to a first inlet of the evaporator, and a first outlet of the evaporator connected to a first inlet of the condenser, the refrigerant including R290, the refrigerant entering the condenser from the first inlet of the condenser to liquefy and release heat, and the refrigerant after liquefaction and heat release entering the evaporator through the first outlet of the condenser and the first inlet of the evaporator to vaporize and absorb heat; the coolant module includes a first coolant circuit and a second coolant circuit; the first coolant circuit is connected to the second inlet and the second outlet of the evaporator, the first coolant in the first coolant circuit entering the evaporator from the second inlet of the evaporator to exchange heat with the refrigerant for cooling; the second coolant circuit is connected to the second inlet and the second outlet of the condenser, the second coolant in the second coolant circuit entering the condenser from the second inlet of the condenser to exchange heat with the refrigerant for heating; an air conditioning module is configured to selectively connect to the first coolant circuit and / or the second coolant circuit.

[0006] In some embodiments, the air conditioning module includes a cooling core; when the passenger compartment cooling mode is activated, the first coolant circuit includes: a first coolant reservoir, a first pump body, a first three-way valve, a second three-way valve, a second proportional three-way valve, and a third proportional three-way valve; the first coolant reservoir is connected to the inlet of the first pump body, the outlet of the first pump body is connected to the first port of the first three-way valve, the second port of the first three-way valve is connected to the first port of the second three-way valve, the second port of the second three-way valve is connected to the first port of the second proportional three-way valve, the third port of the second proportional three-way valve is connected to the first port of the third proportional three-way valve, the second port of the third proportional three-way valve is connected to the inlet of the cooling core, the outlet of the cooling core is connected to the second inlet of the evaporator, and the second outlet of the evaporator is connected to the inlet of the first pump body.

[0007] In some embodiments, the R290-based new energy vehicle thermal management system further includes a radiator, and the second coolant circuit includes: a second coolant reservoir, a second pump body, a third three-way valve, a first proportional three-way valve, a fifth three-way valve, and a fourth three-way valve; the second coolant reservoir is connected to the inlet of the second pump body, the outlet of the second pump body is connected to the second inlet of the condenser, the second outlet of the condenser is connected to the first port of the third three-way valve, the third port of the third three-way valve is connected to the first port of the first proportional three-way valve, the third port of the first proportional three-way valve is connected to the inlet of the radiator, the outlet of the radiator is connected to the first port of the fifth three-way valve, the third port of the fifth three-way valve is connected to the third port of the fourth three-way valve, and the second port of the fourth three-way valve is connected to the inlet of the second pump body.

[0008] In some embodiments, the R290-based new energy vehicle thermal management system further includes a motor module and a radiator. When the passenger compartment cooling mode and the motor module cooling mode are activated simultaneously, the second coolant circuit includes: a second coolant reservoir, a second pump body, a third three-way valve, a first proportional three-way valve, a fifth three-way valve, and a fourth three-way valve. The second coolant reservoir is connected to the inlet of the second pump body, the outlet of the second pump body is connected to the second inlet of the condenser, the second outlet of the condenser is connected to the first port of the third three-way valve, the third port of the third three-way valve is connected to the first port of the first proportional three-way valve, the third port of the first proportional three-way valve is connected to the inlet of the radiator, the outlet of the radiator is connected to the first port of the fifth three-way valve, the second port of the fifth three-way valve is connected to the inlet of the motor module, the outlet of the motor module is connected to the third port of the fourth three-way valve, and the second port of the fourth three-way valve is connected to the inlet of the second pump body.

[0009] In some embodiments, the R290-based new energy vehicle thermal management system further includes a battery module and a radiator. When the battery module cooling mode is activated, the first coolant circuit includes: a first coolant reservoir, a first pump body, a first three-way valve, a second three-way valve, a second proportional three-way valve, a third proportional three-way valve, a third pump body, and a second one-way valve. The first coolant reservoir is connected to the inlet of the first pump body, the outlet of the first pump body is connected to the first port of the first three-way valve, the second port of the first three-way valve is connected to the first port of the second three-way valve, the second port of the second three-way valve is connected to the first port of the second proportional three-way valve, the third port of the second proportional three-way valve is connected to the first port of the third proportional three-way valve, the third port of the third proportional three-way valve is connected to the inlet of the third pump body, and the outlet of the third pump body is connected to the second one-way valve. The inlet of the first check valve and the outlet of the second check valve are connected to the second inlet of the evaporator, and the second outlet of the evaporator is connected to the inlet of the first pump body; the second coolant circuit includes: a second coolant reservoir, a second pump body, a third three-way valve, a first proportional three-way valve, a fifth three-way valve, and a fourth three-way valve; the second coolant reservoir is connected to the inlet of the second pump body, the outlet of the second pump body is connected to the second inlet of the condenser, the second outlet of the condenser is connected to the first port of the third three-way valve, the third port of the third three-way valve is connected to the first port of the first proportional three-way valve, the third port of the first proportional three-way valve is connected to the inlet of the radiator, the outlet of the radiator is connected to the first port of the fifth three-way valve, the third port of the fifth three-way valve is connected to the third port of the fourth three-way valve, and the second port of the fourth three-way valve is connected to the inlet of the second pump body.

[0010] In some embodiments, the R290-based new energy vehicle thermal management system further includes a battery module and a radiator, and the air conditioning module includes a cold air core. When the passenger compartment cooling mode and the battery module cooling mode are activated simultaneously, the first coolant circuit includes: a first coolant reservoir, a first pump body, a first three-way valve, a second three-way valve, a second proportional three-way valve, a third proportional three-way valve, a third pump body, and a second check valve. The first coolant reservoir is connected to the inlet of the first pump body, the outlet of the first pump body is connected to the first port of the first three-way valve, the second port of the first three-way valve is connected to the first port of the second three-way valve, the second port of the second three-way valve is connected to the first port of the second proportional three-way valve, the third port of the second proportional three-way valve is connected to the first port of the third proportional three-way valve, the second port of the third proportional three-way valve is connected to the inlet of the cold air core, and the outlet of the cold air core is connected to the second inlet of the evaporator. The third port of the three-way valve is connected to the inlet of the third pump body, the outlet of the third pump body is connected to the inlet of the second check valve, the outlet of the second check valve is connected to the second inlet of the evaporator, and the second outlet of the evaporator is connected to the inlet of the first pump body; the second coolant circuit includes: a second coolant reservoir, a second pump body, a third three-way valve, a first proportional three-way valve, a fifth three-way valve, and a fourth three-way valve; the second coolant reservoir is connected to the inlet of the second pump body, the outlet of the second pump body is connected to the second inlet of the condenser, the second outlet of the condenser is connected to the first port of the third three-way valve, the third port of the third three-way valve is connected to the first port of the first proportional three-way valve, the third port of the first proportional three-way valve is connected to the inlet of the radiator, the outlet of the radiator is connected to the first port of the fifth three-way valve, the third port of the fifth three-way valve is connected to the third port of the fourth three-way valve, and the second port of the fourth three-way valve is connected to the inlet of the second pump body.

[0011] In some embodiments, the air conditioning module includes a cold air core and a warm air core; when the passenger compartment heating mode is activated, the second coolant circuit includes: a second coolant reservoir, a second pump body, a third three-way valve, a heater, a fourth proportional three-way valve, and a fourth three-way valve; the second coolant reservoir is connected to the inlet of the second pump body, the outlet of the second pump body is connected to the second inlet of the condenser, the second outlet of the condenser is connected to the first port of the third three-way valve, the second port of the third three-way valve is connected to the inlet of the heater, the outlet of the heater is connected to the inlet of the warm air core, the outlet of the warm air core is connected to the first port of the fourth proportional three-way valve, the second port of the fourth proportional three-way valve is connected to the first port of the fourth three-way valve, and the second port of the fourth three-way valve is connected to the inlet of the second pump body.

[0012] In some embodiments, the R290-based new energy vehicle thermal management system further includes a radiator, and the first coolant circuit includes: a first coolant reservoir, a first pump body, a first three-way valve, a second three-way valve, and a second proportional three-way valve; the first coolant reservoir is connected to the inlet of the first pump body, the outlet of the first pump body is connected to the first port of the first three-way valve, the third port of the first three-way valve is connected to the inlet of the radiator, the outlet of the radiator is connected to the third port of the second three-way valve, the second port of the second three-way valve is connected to the first port of the second proportional three-way valve, the second port of the second proportional three-way valve is connected to the second inlet of the evaporator, and the second outlet of the evaporator is connected to the inlet of the first pump body.

[0013] In some embodiments, the R290-based new energy vehicle thermal management system further includes a radiator. When the passenger compartment heating mode and passenger compartment dehumidification mode are activated simultaneously, the first coolant circuit includes: a first coolant reservoir, a first pump body, a first three-way valve, a second three-way valve, a second proportional three-way valve, and a third proportional three-way valve. The first coolant reservoir is connected to the inlet of the first pump body, the outlet of the first pump body is connected to the first port of the first three-way valve, the third port of the first three-way valve is connected to the inlet of the radiator, the outlet of the radiator is connected to the third port of the second three-way valve, the second port of the second three-way valve is connected to the first port of the second proportional three-way valve, the third port of the second proportional three-way valve is connected to the first port of the third proportional three-way valve, the second port of the third proportional three-way valve is connected to the inlet of the cold air core, the outlet of the cold air core is connected to the second inlet of the evaporator, the second port of the second proportional three-way valve is connected to the second inlet of the evaporator, and the second outlet of the evaporator is connected to the inlet of the first pump body.

[0014] In some embodiments, the R290-based new energy vehicle thermal management system further includes a battery module and a radiator. When the passenger compartment heating mode and the battery module heating mode are activated simultaneously, the second coolant circuit further includes: a first one-way valve, a third pump body, the third port of a fourth proportional three-way valve connected to the inlet of the battery module, the outlet of the battery module connected to the inlet of the third pump body, the outlet of the third pump body connected to the inlet of the first one-way valve, and the outlet of the first one-way valve connected to the first port of the fourth three-way valve.

[0015] In some embodiments, the R290-based new energy vehicle thermal management system further includes a motor module and a radiator. When the passenger compartment heating mode and the motor module waste heat recovery mode are activated simultaneously, the first coolant circuit includes: a first coolant reservoir, a first pump body, a first three-way valve, a second three-way valve, a first proportional three-way valve, a second proportional three-way valve, and a fifth three-way valve. The first coolant reservoir is connected to the inlet of the first pump body, the outlet of the first pump body is connected to the first port of the first three-way valve, the third port of the first three-way valve is connected to the inlet of the radiator, the outlet of the radiator is connected to the third port of the second three-way valve, the third port of the first three-way valve is also connected to the third port of the first proportional three-way valve, the second port of the first proportional three-way valve is connected to the inlet of the motor module, the outlet of the motor module is connected to the third port of the fifth three-way valve, the first port of the fifth three-way valve is connected to the third port of the second three-way valve, the second port of the second three-way valve is connected to the first port of the second proportional three-way valve, the second port of the second proportional three-way valve is connected to the second inlet of the evaporator, and the second outlet of the evaporator is connected to the inlet of the first pump body.

[0016] In some embodiments, the R290-based new energy vehicle thermal management system further includes a battery module, a motor module, and a radiator. When the passenger compartment heating mode, the motor module waste heat recovery mode, and the battery module waste heat recovery mode are simultaneously activated, the first coolant circuit includes: a first coolant reservoir, a first pump body, a first three-way valve, a second three-way valve, a first proportional three-way valve, a second proportional three-way valve, a fifth three-way valve, a third proportional three-way valve, a third pump body, and a second check valve. The first coolant reservoir is connected to the inlet of the first pump body, the outlet of the first pump body is connected to the first port of the first three-way valve, the third port of the first three-way valve is connected to the inlet of the radiator, and the outlet of the radiator is connected to the third port of the second three-way valve. The third port of the first three-way valve also... The first proportional three-way valve is connected to the third port. The second port of the first proportional three-way valve is connected to the inlet of the motor module. The outlet of the motor module is connected to the third port of the fifth three-way valve. The first port of the fifth three-way valve is connected to the third port of the second three-way valve. The second port of the second three-way valve is connected to the first port of the second proportional three-way valve. The third port of the second proportional three-way valve is connected to the first port of the third proportional three-way valve. The third port of the third proportional three-way valve is connected to the inlet of the third pump body. The outlet of the third pump body is connected to the inlet of the second check valve. The outlet of the second check valve is connected to the second inlet of the evaporator. The second port of the second proportional three-way valve is connected to the second inlet of the evaporator. The second outlet of the evaporator is connected to the inlet of the first pump body.

[0017] In some embodiments, the refrigerant circuit further includes a compressor, a regenerator, and a gas-liquid separator, wherein the compressor outlet is connected to a first inlet of a condenser, the first outlet of the condenser is connected to a first inlet of the regenerator, the first outlet of the regenerator is connected to a first inlet of an evaporator, the first outlet of the evaporator is connected to a second inlet of the regenerator, the second outlet of the regenerator is connected to the inlet of the gas-liquid separator, and the outlet of the gas-liquid separator is connected to the inlet of the compressor.

[0018] In some embodiments, the R290-based new energy vehicle thermal management system further includes a battery module, and the coolant module further includes a third coolant circuit. The third coolant circuit includes a third coolant reservoir and a third pump body. The third coolant reservoir is connected to the inlet of the third pump body, the outlet of the third pump body is connected to the inlet of the battery module, and the outlet of the battery module is connected to the inlet of the third pump body.

[0019] The R290-based thermal management system for new energy vehicles provided in this application involves refrigerant liquefying and releasing heat in the condenser and vaporizing and absorbing heat in the evaporator. A first coolant exchanges heat with the refrigerant in the evaporator for cooling, and a second coolant exchanges heat with the refrigerant in the condenser for heating. The air conditioning module is configured to selectively connect to the first coolant circuit and / or the second coolant circuit, thereby preventing refrigerant from entering the passenger compartment. Heat exchange between the refrigerant circuit and the coolant circuit is achieved through the condenser and evaporator. An indirect heat pump system is used to realize the cooling and heating modes of the passenger compartment, which is beneficial to improving the working efficiency of the R290-based thermal management system for new energy vehicles.

[0020] The R290-based thermal management system for new energy vehicles provided in this application utilizes the conversion of various valve systems to achieve multi-mode switching, enabling the recycling of all waste heat from components such as the battery module, motor module, and air conditioning module, thereby reducing the energy consumption of the R290-based thermal management system for new energy vehicles. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a new energy vehicle thermal management system based on R290 according to an embodiment of this application;

[0023] Figure 2 A schematic diagram illustrating the structure of the R290-based thermal management system for new energy vehicles in this application when the passenger compartment cooling mode is activated;

[0024] Figure 3A schematic diagram illustrating the structure of the R290-based thermal management system for new energy vehicles in this application, showing the operation of the passenger compartment cooling mode and the motor module heat dissipation mode.

[0025] Figure 4 A schematic diagram illustrating the structure of the R290-based thermal management system for new energy vehicles in this application, showing the battery module cooling mode activated.

[0026] Figure 5 A schematic diagram illustrating the structure of the R290-based thermal management system for new energy vehicles in this application, showing the operation of the passenger compartment cooling mode and the battery module cooling mode.

[0027] Figure 6 A schematic diagram illustrating the structure of the R290-based thermal management system for new energy vehicles in this application, showing the activation of the passenger compartment heating mode.

[0028] Figure 7 This is a schematic diagram illustrating the structure of the R290-based thermal management system for new energy vehicles in this application, showing the operation of the passenger compartment heating mode and passenger compartment dehumidification mode.

[0029] Figure 8 A schematic diagram illustrating the structure of the R290-based thermal management system for new energy vehicles in this application, showing the activation of the passenger compartment heating mode and the battery module heating mode.

[0030] Figure 9 This is a schematic diagram illustrating the structure of the R290-based new energy vehicle thermal management system in this application, showing the operation of the passenger compartment heating mode and the motor module waste heat recovery mode.

[0031] Figure 10 This is a schematic diagram illustrating the structure of the R290-based new energy vehicle thermal management system in this application embodiment, showing the operation of the passenger compartment heating mode, the motor module waste heat recovery mode, and the battery module waste heat recovery mode.

[0032] The components in the diagram are labeled as follows:

[0033] 101. Compressor; 102. Condenser; 103. Regenerator; 104. Evaporator; 105. Gas-liquid separator; 106. Electronic expansion valve; 107. Temperature and pressure sensor;

[0034] 201. Battery module; 202. Motor module; 203. Air conditioning module; 204. Radiator; 205. Heater; 206. First coolant reservoir; 207. Second coolant reservoir; 208. Third coolant reservoir; 209. First pump body; 210. Second pump body; 211. Third pump body; 212. First three-way valve; 213. Second three-way valve; 214. Third three-way valve; 215. Fourth three-way valve; 216. Fifth three-way valve; 217. First proportional three-way valve; 218. Second proportional three-way valve; 219. Third proportional three-way valve; 220. Fourth proportional three-way valve; 221. First check valve; 222. Second check valve;

[0035] 2031. Cold air core; 2032. Warm air core; 2033. Blower;

[0036] 2041. Fan. Detailed Implementation

[0037] The preferred embodiments of this application are described in detail below with reference to the accompanying drawings to fully introduce the technical content of this application to those skilled in the art, to demonstrate that this application can be implemented, and to make the disclosed technical content of this application clearer, so that those skilled in the art can more easily understand how to implement this application. However, this application can be embodied in many different forms of embodiments, and the protection scope of this application is not limited to the embodiments mentioned herein. The description of the embodiments below is not intended to limit the scope of this application.

[0038] The directional terms used in this application, such as "up", "down", "front", "back", "left", "right", "inside", "outside", and "side", are only for the directions shown in the accompanying drawings. The directional terms used herein are for the purpose of explaining and illustrating this application, and not for limiting the scope of protection of this application.

[0039] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and modules with similar structures or functions are indicated by similar numerical designations. Furthermore, for ease of understanding and description, the dimensions and thickness of each module shown in the drawings are arbitrary, and this application does not limit the dimensions and thickness of each module.

[0040] Please see Figure 1 This application provides a thermal management system for new energy vehicles based on R290. The thermal management system for new energy vehicles based on R290 includes: a refrigerant module, a coolant module, and an air conditioning module 203.

[0041] Please see Figure 1 The refrigerant module includes: compressor 101, condenser 102, regenerator 103, evaporator 104, and gas-liquid separator 105.

[0042] Please see Figure 1 The first inlet of condenser 102 is used to input refrigerant, and the first outlet of condenser 102 is connected to the first inlet of evaporator 104. The first outlet of evaporator 104 is connected to the first inlet of condenser 102. Specifically, the outlet of compressor 101 is connected to the first inlet of condenser 102, the first outlet of condenser 102 is connected to the first inlet of regenerator 103, the first outlet of regenerator 103 is connected to the first inlet of evaporator 104, the first outlet of evaporator 104 is connected to the second inlet of regenerator 103, the second outlet of regenerator 103 is connected to the inlet of gas-liquid separator 105, and the outlet of gas-liquid separator 105 is connected to the inlet of compressor 101.

[0043] The compressor 101, as the core module of the refrigerant module, primarily compresses low-pressure gaseous refrigerant into high-pressure gaseous refrigerant. The condenser 102 cools and condenses the high-temperature, high-pressure gaseous refrigerant at the outlet of the compressor 101 into a high-temperature, high-pressure liquid refrigerant, releasing heat during liquefaction within the condenser 102. The evaporator 104 absorbs heat, causing the high-temperature, high-pressure liquid refrigerant at the first outlet of the condenser 102 to evaporate into a low-temperature, low-pressure gaseous refrigerant. The regenerator 103 facilitates heat exchange between the low-temperature, low-pressure gaseous refrigerant at the first outlet of the evaporator 104 and the high-temperature, high-pressure liquid refrigerant at the first outlet of the condenser 102, improving the efficiency of the refrigerant system. The gas-liquid separator 105 separates the liquid and gaseous components of the refrigerant, ensuring only gaseous refrigerant enters the compressor 101, preventing liquid refrigerant from entering, avoiding liquid slugging, and thus protecting the safety and lifespan of the compressor 101.

[0044] In the refrigerant circuit, the refrigerant enters the condenser 102 from the first inlet of the condenser 102, liquefies and releases heat, and then enters the evaporator 104 through the first outlet of the condenser 102 and the first inlet of the evaporator 104 to vaporize and absorb heat.

[0045] Please see Figure 1 The refrigerant module also includes an electronic expansion valve 106 and a temperature and pressure sensor 107.

[0046] The electronic expansion valve 106 is located between the first outlet of the regenerator 103 and the first inlet of the evaporator 104. By precisely controlling the refrigerant flow rate, the electronic expansion valve 106 ensures that the refrigerant in the evaporator 104 can be completely evaporated, thereby improving the efficiency and performance of the refrigerant system.

[0047] The temperature and pressure sensor 107 is disposed between the outlet of the compressor 101 and the first inlet of the condenser 102; and / or disposed between the outlet of the gas-liquid separator 105 and the inlet of the compressor 101. In this embodiment, the temperature and pressure sensor 107 is disposed between the outlet of the compressor 101 and the first inlet of the condenser 102, and between the outlet of the gas-liquid separator 105 and the inlet of the compressor 101.

[0048] It is worth noting that in this embodiment, the refrigerant in the refrigerant module is R290. Since R290 is flammable, in this embodiment, the refrigerant module is placed inside a sealed housing 100. The housing 100 contains multiple propane concentration sensors (not shown in the figure) to monitor the refrigerant leakage in real time.

[0049] Please see Figure 1 The coolant module includes a first coolant circuit and a second coolant circuit.

[0050] The first coolant circuit is connected to the second inlet and the second outlet of the evaporator 104. The first coolant in the first coolant circuit enters the evaporator 104 from the second inlet and exchanges heat with the refrigerant for cooling. The second coolant circuit is connected to the second inlet and the second outlet of the condenser 102. The second coolant in the second coolant circuit enters the condenser 102 from the second inlet and exchanges heat with the refrigerant for heating.

[0051] The air conditioning module 203 includes a cold air core 2031, a warm air core 2032, and a blower 2033. The air conditioning module 203 is configured to selectively connect to a first coolant circuit and / or a second coolant circuit. This prevents refrigerant from entering the passenger compartment. Heat exchange between the refrigerant circuit and the coolant circuit is achieved through the condenser 102 and evaporator 104. An indirect heat pump system is used to achieve both cooling and heating modes for the passenger compartment, which helps improve the efficiency of the R290-based thermal management system for new energy vehicles.

[0052] Please see Figure 1 The thermal management system for new energy vehicles based on R290 also includes: battery module 201, motor module 202 and radiator 204.

[0053] The battery module 201 is configured to be selectively connected to either a first coolant circuit or a second coolant circuit.

[0054] The motor module 202 includes a motor, a motor control unit (MCU), and an on-board charger (OBC). The motor module 202 is configured to selectively connect to a first coolant circuit or a second coolant circuit.

[0055] The radiator 204 includes a fan 2041. The radiator 204 is configured to selectively connect to a first coolant circuit or a second coolant circuit.

[0056] Please see Figure 1 The coolant module also includes a third coolant circuit, which comprises a third coolant reservoir 208 and a third pump body 211. The third coolant reservoir 208 is connected to the inlet of the third pump body 211, and the outlet of the third pump body 211 is connected to the inlet of the battery module 201. The outlet of the battery module 201 is also connected to the inlet of the third pump body 211. The third coolant from the third coolant reservoir 208 enters the battery module 201 to exchange heat with the battery module.

[0057] Please see Figure 2 When the occupant cabin cooling mode is activated, the first coolant circuit includes: a first coolant reservoir 206, a first pump body 209, a first three-way valve 212, a second three-way valve 213, a second proportional three-way valve 218, and a third proportional three-way valve 219.

[0058] The first coolant reservoir 206 is connected to the inlet of the first pump body 209. The outlet of the first pump body 209 is connected to the first port of the first three-way valve 212. The second port of the first three-way valve 212 is connected to the first port of the second three-way valve 213. The second port of the second three-way valve 213 is connected to the first port of the second proportional three-way valve 218. The third port of the second proportional three-way valve 218 is connected to the first port of the third proportional three-way valve 219. The second port of the third proportional three-way valve 219 is connected to the inlet of the cooling air core 2031. The outlet of the cooling air core 2031 is connected to the second inlet of the evaporator 104. The second outlet of the evaporator 104 is connected to the inlet of the first pump body 209. In other words, the first coolant in the first coolant reservoir 206 flows back to the first pump body 209 after passing through the first pump body 209, the first three-way valve 212, the second three-way valve 213, the second proportional three-way valve 218, the third proportional three-way valve 219, the cooling air core 2031, and the evaporator 104. The first coolant in the first coolant reservoir 206 is cooled in the evaporator 104, and the cooling capacity is sent to the crew compartment by the blower 2033 at the end of the cold air core 2031 to achieve the purpose of cooling the crew compartment.

[0059] Please see Figure 2 When the occupant cabin cooling mode is activated, the second coolant circuit includes: a second coolant reservoir 207, a second pump body 210, a third three-way valve 214, a first proportional three-way valve 217, a fifth three-way valve 216, and a fourth three-way valve 215.

[0060] The second coolant reservoir 207 is connected to the inlet of the second pump body 210. The outlet of the second pump body 210 is connected to the second inlet of the condenser 102. The second outlet of the condenser 102 is connected to the first port of the third three-way valve 214. The third port of the third three-way valve 214 is connected to the first port of the first proportional three-way valve 217. The third port of the first proportional three-way valve 217 is connected to the inlet of the radiator 204. The outlet of the radiator 204 is connected to the first port of the fifth three-way valve 216. The third port of the fifth three-way valve 216 is connected to the third port of the fourth three-way valve 215. The second port of the fourth three-way valve 215 is connected to the inlet of the second pump body 210. In other words, the second coolant in the second coolant reservoir 207 flows back to the second pump body 210 sequentially through the condenser 102, the third three-way valve 214, the first proportional three-way valve 217, the radiator 204, the fifth three-way valve 216, and the fourth three-way valve 215. The second coolant is heated in the condenser 102, and the heat of the second coolant is discharged by the fan 2041 in the radiator 204, thereby cooling the second coolant.

[0061] Please see Figure 3 When the crew cabin cooling mode and the motor module heat dissipation mode are activated simultaneously, the first coolant circuit includes: a first coolant reservoir 206, a first pump body 209, a first three-way valve 212, a second three-way valve 213, a second proportional three-way valve 218, and a third proportional three-way valve 219.

[0062] The first coolant reservoir 206 is connected to the inlet of the first pump body 209. The outlet of the first pump body 209 is connected to the first port of the first three-way valve 212. The second port of the first three-way valve 212 is connected to the first port of the second three-way valve 213. The second port of the second three-way valve 213 is connected to the first port of the second proportional three-way valve 218. The third port of the second proportional three-way valve 218 is connected to the first port of the third proportional three-way valve 219. The second port of the third proportional three-way valve 219 is connected to the inlet of the cooling air core 2031. The outlet of the cooling air core 2031 is connected to the second inlet of the evaporator 104. The second outlet of the evaporator 104 is connected to the inlet of the first pump body 209. In other words, the first coolant in the first coolant reservoir 206 flows back to the first pump body 209 after passing through the first pump body 209, the first three-way valve 212, the second three-way valve 213, the second proportional three-way valve 218, the third proportional three-way valve 219, the cooling air core 2031, and the evaporator 104. The first coolant in the first coolant reservoir 206 is cooled in the evaporator 104, and the cooling capacity is sent to the crew compartment by the blower 2033 at the end of the cold air core 2031 to achieve the purpose of cooling the crew compartment.

[0063] Please see Figure 3When the crew cabin cooling mode and the motor module heat dissipation mode are activated simultaneously, the second coolant circuit includes: a second coolant reservoir 207, a second pump body 210, a third three-way valve 214, a first proportional three-way valve 217, a fifth three-way valve 216, and a fourth three-way valve 215.

[0064] The second coolant reservoir 207 is connected to the inlet of the second pump body 210. The outlet of the second pump body 210 is connected to the second inlet of the condenser 102. The second outlet of the condenser 102 is connected to the first port of the third three-way valve 214. The third port of the third three-way valve 214 is connected to the first port of the first proportional three-way valve 217. The third port of the first proportional three-way valve 217 is connected to the inlet of the radiator 204. The outlet of the radiator 204 is connected to the first port of the fifth three-way valve 216. The second port of the fifth three-way valve 216 is connected to the inlet of the motor module 202. The outlet of the motor module 202 is connected to the third port of the fourth three-way valve 215. The second port of the fourth three-way valve 215 is connected to the inlet of the second pump body 210. In other words, the second coolant in the second coolant reservoir 207 flows back to the second pump body 210 sequentially through the condenser 102, the third three-way valve 214, the first proportional three-way valve 217, the radiator 204, the fifth three-way valve 216, the motor module 202, and the fourth three-way valve 215. The second coolant is heated in the condenser 102, and the heat of the second coolant is discharged by the fan 2041 in the radiator 204, so that the second coolant is cooled. The cooled coolant enters the motor module 202 to achieve the purpose of heat dissipation for the motor module 202.

[0065] Please see Figure 4 When the battery module cooling mode is activated, the first coolant circuit includes: a first coolant reservoir 206, a first pump body 209, a first three-way valve 212, a second three-way valve 213, a second proportional three-way valve 218, a third proportional three-way valve 219, a third pump body 211, and a second one-way valve 222.

[0066] The first coolant reservoir 206 is connected to the inlet of the first pump body 209, the outlet of the first pump body 209 is connected to the first port of the first three-way valve 212, the second port of the first three-way valve 212 is connected to the first port of the second three-way valve 213, the second port of the second three-way valve 213 is connected to the first port of the second proportional three-way valve 218, the third port of the second proportional three-way valve 218 is connected to the first port of the third proportional three-way valve 219, the third port of the third proportional three-way valve 219 is connected to the inlet of the third pump body 211, the outlet of the third pump body 211 is connected to the inlet of the second one-way valve 222, the outlet of the second one-way valve 222 is connected to the second inlet of the evaporator 104, and the second outlet of the evaporator 104 is connected to the inlet of the first pump body 209. The first coolant in the first coolant reservoir 206 flows sequentially through the first pump body 209, the first three-way valve 212, the second three-way valve 213, the second proportional three-way valve 218, the third proportional three-way valve 219, the third pump body 211, the second one-way valve 222, and the evaporator 104 back to the first pump body 209. The first coolant in the first coolant reservoir 206 is cooled in the evaporator 104, and the cooled first coolant enters the battery module 201 to cool the battery module 201.

[0067] Please see Figure 4 When the battery module cooling mode is activated, the second coolant circuit includes: a second coolant reservoir 207, a second pump body 210, a third three-way valve 214, a first proportional three-way valve 217, a fifth three-way valve 216, and a fourth three-way valve 215.

[0068] The second coolant reservoir 207 is connected to the inlet of the second pump body 210. The outlet of the second pump body 210 is connected to the second inlet of the condenser 102. The second outlet of the condenser 102 is connected to the first port of the third three-way valve 214. The third port of the third three-way valve 214 is connected to the first port of the first proportional three-way valve 217. The third port of the first proportional three-way valve 217 is connected to the inlet of the radiator 204. The outlet of the radiator 204 is connected to the first port of the fifth three-way valve 216. The third port of the fifth three-way valve 216 is connected to the third port of the fourth three-way valve 215. The second port of the fourth three-way valve 215 is connected to the inlet of the second pump body 210. In other words, the second coolant in the second coolant reservoir 207 flows back to the second pump body 210 sequentially through the condenser 102, the third three-way valve 214, the first proportional three-way valve 217, the radiator 204, the fifth three-way valve 216, and the fourth three-way valve 215. The second coolant is heated in the condenser 102, and the heat of the second coolant is discharged by the fan 2041 in the radiator 204, thereby cooling the second coolant.

[0069] Please see Figure 5When the occupant cabin cooling mode and the battery module cooling mode are activated simultaneously, the first coolant circuit includes: a first coolant reservoir 206, a first pump body 209, a first three-way valve 212, a second three-way valve 213, a second proportional three-way valve 218, a third proportional three-way valve 219, a third pump body 211, and a second one-way valve 222.

[0070] The first coolant reservoir 206 is connected to the inlet of the first pump body 209, the outlet of the first pump body 209 is connected to the first port of the first three-way valve 212, the second port of the first three-way valve 212 is connected to the first port of the second three-way valve 213, the second port of the second three-way valve 213 is connected to the first port of the second proportional three-way valve 218, the third port of the second proportional three-way valve 218 is connected to the first port of the third proportional three-way valve 219, the second port of the third proportional three-way valve 219 is connected to the inlet of the cold air core 2031, the outlet of the cold air core 2031 is connected to the second inlet of the evaporator 104, the third port of the third proportional three-way valve 219 is connected to the inlet of the third pump body 211, the outlet of the third pump body 211 is connected to the inlet of the second one-way valve 222, the outlet of the second one-way valve 222 is connected to the second inlet of the evaporator 104, and the second outlet of the evaporator 104 is connected to the inlet of the first pump body 209. The first coolant in the first coolant reservoir 206 passes sequentially through the first pump body 209, the first three-way valve 212, the second three-way valve 213, and the second proportional three-way valve 218 into the third proportional three-way valve 219. The first coolant at the second port of the third proportional three-way valve 219 enters the air cooling core 2031. The first coolant at the third port of the third proportional three-way valve 219 passes through the third pump body 211 into the second one-way valve 222. The first coolant at the outlet of the air cooling core 2031 and the first coolant at the outlet of the second one-way valve 222 merge and flow back to the first pump body 209 through the evaporator 104. The first coolant in the first coolant reservoir 206 is cooled in the evaporator 104. The cooled first coolant is divided into two paths. One path enters the cold air core 2031 and is sent to the passenger compartment by the blower 2033 to achieve the purpose of cooling the passenger compartment. The other path enters the battery module 201 to achieve the purpose of cooling the battery module 201. In the end, the passenger compartment and the battery module are cooled at the same time.

[0071] Please see Figure 5 When the crew cabin cooling mode and the battery module cooling mode are activated simultaneously, the second coolant circuit includes: a second coolant reservoir 207, a second pump body 210, a third three-way valve 214, a first proportional three-way valve 217, a fifth three-way valve 216, and a fourth three-way valve 215.

[0072] The second coolant reservoir 207 is connected to the inlet of the second pump body 210. The outlet of the second pump body 210 is connected to the second inlet of the condenser 102. The second outlet of the condenser 102 is connected to the first port of the third three-way valve 214. The third port of the third three-way valve 214 is connected to the first port of the first proportional three-way valve 217. The third port of the first proportional three-way valve 217 is connected to the inlet of the radiator 204. The outlet of the radiator 204 is connected to the first port of the fifth three-way valve 216. The third port of the fifth three-way valve 216 is connected to the third port of the fourth three-way valve 215. The second port of the fourth three-way valve 215 is connected to the inlet of the second pump body 210. In other words, the second coolant in the second coolant reservoir 207 flows back to the second pump body 210 sequentially through the condenser 102, the third three-way valve 214, the first proportional three-way valve 217, the radiator 204, the fifth three-way valve 216, and the fourth three-way valve 215. The second coolant is heated in the condenser 102, and the heat of the second coolant is discharged by the fan 2041 in the radiator 204, thereby cooling the second coolant.

[0073] Please see Figure 6 When the crew cabin heating mode is activated, the second coolant circuit includes: a second coolant reservoir 207, a second pump body 210, a third three-way valve 214, a heater 205, a fourth proportional three-way valve 220, and a fourth three-way valve 215.

[0074] The second coolant reservoir 207 is connected to the inlet of the second pump body 210. The outlet of the second pump body 210 is connected to the second inlet of the condenser 102. The second outlet of the condenser 102 is connected to the first port of the third three-way valve 214. The second port of the third three-way valve 214 is connected to the inlet of the heater 205. The outlet of the heater 205 is connected to the inlet of the heater core 2032. The outlet of the heater core 2032 is connected to the first port of the fourth proportional three-way valve 220. The second port of the fourth proportional three-way valve 220 is connected to the first port of the fourth three-way valve 215. The second port of the fourth three-way valve 215 is connected to the inlet of the second pump body 210. In other words, the second coolant in the second coolant reservoir 207 flows back to the second pump body 210 sequentially through the condenser 102, the third three-way valve 214, the heater 205, the heater core 2032, the fourth proportional three-way valve 220, and the fourth three-way valve 215. The second coolant in the second coolant reservoir 207 is heated in the condenser 102. The heated second coolant is then heated again in the heater 205 and then enters the heater core 2032. The heat is delivered to the crew compartment by the blower 2033 to achieve the purpose of heating the crew compartment.

[0075] Please see Figure 6When the crew cabin heating mode is activated, the first coolant circuit includes: a first coolant reservoir 206, a first pump body 209, a first three-way valve 212, a second three-way valve 213, and a second proportional three-way valve 218.

[0076] The first coolant reservoir 206 is connected to the inlet of the first pump body 209. The outlet of the first pump body 209 is connected to the first port of the first three-way valve 212. The third port of the first three-way valve 212 is connected to the inlet of the radiator 204. The outlet of the radiator 204 is connected to the third port of the second three-way valve 213. The second port of the second three-way valve 213 is connected to the first port of the second proportional three-way valve 218. The second port of the second proportional three-way valve 218 is connected to the second inlet of the evaporator 104. The second outlet of the evaporator 104 is connected to the inlet of the first pump body 209. In other words, the first coolant in the first coolant reservoir 206 flows back to the first pump body 209 after passing through the first pump body 209, the first three-way valve 212, the radiator 204, the second three-way valve 213, the second proportional three-way valve 218, and the evaporator 104. The first coolant in the first coolant reservoir 206 is cooled in the evaporator 104, and the coolant in the second coolant is discharged by the fan 2041 in the radiator 204, so that the first coolant is heated.

[0077] Please see Figure 7 When the crew cabin heating mode and the crew cabin dehumidification mode are activated simultaneously, the second coolant circuit includes: a second coolant reservoir 207, a second pump body 210, a third three-way valve 214, a heater 205, a fourth proportional three-way valve 220, and a fourth three-way valve 215.

[0078] The second coolant reservoir 207 is connected to the inlet of the second pump body 210. The outlet of the second pump body 210 is connected to the second inlet of the condenser 102. The second outlet of the condenser 102 is connected to the first port of the third three-way valve 214. The second port of the third three-way valve 214 is connected to the inlet of the heater 205. The outlet of the heater 205 is connected to the inlet of the heater core 2032. The outlet of the heater core 2032 is connected to the first port of the fourth proportional three-way valve 220. The second port of the fourth proportional three-way valve 220 is connected to the first port of the fourth three-way valve 215. The second port of the fourth three-way valve 215 is connected to the inlet of the second pump body 210. In other words, the second coolant in the second coolant reservoir 207 flows back to the second pump body 210 sequentially through the condenser 102, the third three-way valve 214, the heater 205, the heater core 2032, the fourth proportional three-way valve 220, and the fourth three-way valve 215. The second coolant in the second coolant reservoir 207 is heated in the condenser 102. The heated second coolant is then heated again in the heater 205 and then enters the heater core 2032. The heat is delivered to the crew compartment by the blower 2033 to achieve the purpose of heating the crew compartment.

[0079] Please see Figure 7 When the crew cabin heating mode and the crew cabin dehumidification mode are activated simultaneously, the first coolant circuit includes: a first coolant reservoir 206, a first pump body 209, a first three-way valve 212, a second three-way valve 213, a second proportional three-way valve 218, and a third proportional three-way valve 219.

[0080] The first coolant reservoir 206 is connected to the inlet of the first pump body 209, the outlet of the first pump body 209 is connected to the first port of the first three-way valve 212, the third port of the first three-way valve 212 is connected to the inlet of the radiator 204, the outlet of the radiator 204 is connected to the third port of the second three-way valve 213, the second port of the second three-way valve 213 is connected to the first port of the second proportional three-way valve 218, the third port of the second proportional three-way valve 218 is connected to the first port of the third proportional three-way valve 219, the second port of the third proportional three-way valve 219 is connected to the inlet of the cold air core 2031, the outlet of the cold air core 2031 is connected to the second inlet of the evaporator 104, the second port of the second proportional three-way valve 218 is connected to the second inlet of the evaporator 104, and the second outlet of the evaporator 104 is connected to the inlet of the first pump body 209. The first coolant in the first coolant reservoir 206 passes sequentially through the first pump body 209, the first three-way valve 212, the radiator 204, and the second three-way valve 213 into the second proportional three-way valve 218. The first coolant at the third port of the second proportional three-way valve 218 passes sequentially through the third proportional three-way valve 219 into the air cooling core 2031. The first coolant at the outlet of the air cooling core 2031 merges with the first coolant at the second port of the second proportional three-way valve 218 and flows back to the first pump body 209 through the evaporator 104. The first coolant in the first coolant reservoir 206 is cooled in the evaporator 104. The fan 2041 in the radiator 204 discharges the cold energy of the second coolant, which heats the first coolant. The temperature of the second coolant at the outlet of the radiator 204 is still much lower than the temperature of the passenger compartment. The second coolant at the outlet of the radiator 204 is then sent into the cold air core 2031, where the blower 2033 exchanges heat between the second coolant and the passenger compartment, thereby achieving the purpose of dehumidifying the passenger compartment.

[0081] Please see Figure 8 When the crew cabin heating mode and the battery module heating mode are activated simultaneously, the second coolant circuit includes: a second coolant reservoir 207, a second pump body 210, a third three-way valve 214, a heater 205, a fourth proportional three-way valve 220, a fourth three-way valve 215, a first one-way valve 221, and a third pump body 211.

[0082] The second coolant reservoir 207 is connected to the inlet of the second pump body 210, the outlet of the second pump body 210 is connected to the second inlet of the condenser 102, the second outlet of the condenser 102 is connected to the first port of the third three-way valve 214, the second port of the third three-way valve 214 is connected to the inlet of the heater 205, the outlet of the heater 205 is connected to the inlet of the heater core 2032, the outlet of the heater core 2032 is connected to the first port of the fourth proportional three-way valve 220, the third port of the fourth proportional three-way valve 220 is connected to the inlet of the battery module 201, the outlet of the battery module 201 is connected to the inlet of the third pump body 211, the outlet of the third pump body 211 is connected to the inlet of the first one-way valve 221, the outlet of the first one-way valve 221 is connected to the first port of the fourth three-way valve 215, the second port of the fourth proportional three-way valve 220 is connected to the first port of the fourth three-way valve 215, and the second port of the fourth three-way valve 215 is connected to the inlet of the second pump body 210. The second coolant in the second coolant reservoir 207 sequentially passes through the condenser 102, the third three-way valve 214, the heater 205, and the heater core 2032 before entering the fourth proportional three-way valve 220. The second coolant at the third port of the fourth proportional three-way valve 220 sequentially passes through the battery module 201 and the third pump body 211 before entering the first one-way valve 221. The second coolant at the outlet of the first one-way valve 221 merges with the second coolant at the second port of the fourth proportional three-way valve 220 and flows back to the second pump body 210 through the fourth three-way valve 215. The second coolant in the second coolant reservoir 207 is heated in the condenser 102, and then reheated in the heater 205 before entering the heater core 2032. The heat is then delivered to the passenger compartment by the blower 2033, achieving the purpose of heating the passenger compartment. The second coolant at the third port of the fourth proportional three-way valve 220 enters the battery module 201, achieving the purpose of heating the battery module 201.

[0083] Please see Figure 8 When the crew cabin heating mode and the battery module heating mode are activated simultaneously, the first coolant circuit includes: a first coolant reservoir 206, a first pump body 209, a first three-way valve 212, a second three-way valve 213, and a second proportional three-way valve 218.

[0084] The first coolant reservoir 206 is connected to the inlet of the first pump body 209. The outlet of the first pump body 209 is connected to the first port of the first three-way valve 212. The third port of the first three-way valve 212 is connected to the inlet of the radiator 204. The outlet of the radiator 204 is connected to the third port of the second three-way valve 213. The second port of the second three-way valve 213 is connected to the first port of the second proportional three-way valve 218. The second port of the second proportional three-way valve 218 is connected to the second inlet of the evaporator 104. The second outlet of the evaporator 104 is connected to the inlet of the first pump body 209. In other words, the first coolant in the first coolant reservoir 206 flows back to the first pump body 209 after passing through the first pump body 209, the first three-way valve 212, the radiator 204, the second three-way valve 213, the second proportional three-way valve 218, and the evaporator 104. The first coolant in the first coolant reservoir 206 is cooled in the evaporator 104, and the coolant in the second coolant is discharged by the fan 2041 in the radiator 204, so that the first coolant is heated.

[0085] Please see Figure 9 When the crew cabin heating mode and the motor module waste heat recovery mode are activated simultaneously, the second coolant circuit includes: a second coolant reservoir 207, a second pump body 210, a third three-way valve 214, a heater 205, a fourth proportional three-way valve 220, and a fourth three-way valve 215.

[0086] The second coolant reservoir 207 is connected to the inlet of the second pump body 210. The outlet of the second pump body 210 is connected to the second inlet of the condenser 102. The second outlet of the condenser 102 is connected to the first port of the third three-way valve 214. The second port of the third three-way valve 214 is connected to the inlet of the heater 205. The outlet of the heater 205 is connected to the inlet of the heater core 2032. The outlet of the heater core 2032 is connected to the first port of the fourth proportional three-way valve 220. The second port of the fourth proportional three-way valve 220 is connected to the first port of the fourth three-way valve 215. The second port of the fourth three-way valve 215 is connected to the inlet of the second pump body 210. In other words, the second coolant in the second coolant reservoir 207 flows back to the second pump body 210 sequentially through the condenser 102, the third three-way valve 214, the heater 205, the heater core 2032, the fourth proportional three-way valve 220, and the fourth three-way valve 215. The second coolant in the second coolant reservoir 207 is heated in the condenser 102. The heated second coolant is then heated again in the heater 205 and then enters the heater core 2032. The heat is delivered to the crew compartment by the blower 2033 to achieve the purpose of heating the crew compartment.

[0087] Please see Figure 9When the crew cabin heating mode and the motor module waste heat recovery mode are activated simultaneously, the first coolant circuit includes: a first coolant reservoir 206, a first pump body 209, a first three-way valve 212, a second three-way valve 213, a first proportional three-way valve 217, a second proportional three-way valve 218, and a fifth three-way valve 216.

[0088] Specifically, the first coolant reservoir 206 is connected to the inlet of the first pump body 209, the outlet of the first pump body 209 is connected to the first port of the first three-way valve 212, the third port of the first three-way valve 212 is connected to the inlet of the radiator 204, the outlet of the radiator 204 is connected to the third port of the second three-way valve 213, the third port of the first three-way valve 212 is also connected to the third port of the first proportional three-way valve 217, the second port of the first proportional three-way valve 217 is connected to the inlet of the motor module 202, the outlet of the motor module 202 is connected to the third port of the fifth three-way valve 216, the first port of the fifth three-way valve 216 is connected to the third port of the second three-way valve 213, the second port of the second three-way valve 213 is connected to the first port of the second proportional three-way valve 218, the second port of the second proportional three-way valve 218 is connected to the second inlet of the evaporator 104, and the second outlet of the evaporator 104 is connected to the inlet of the first pump body 209. The first coolant in the first coolant reservoir 206 passes through the first pump body 209 and enters the first three-way valve 212. A portion of the first coolant at the third port of the first three-way valve 212 enters the radiator 204. Another portion of the first coolant at the third port of the first three-way valve 212 passes through the first proportional three-way valve 217 and the motor module 202 and enters the fifth three-way valve 216. The first coolant at the outlet of the radiator 204 and the first coolant at the outlet of the fifth three-way valve 216 merge and pass through the second three-way valve 213, the second proportional three-way valve 218 and the evaporator 104 back to the first pump body 209. The first coolant in the first coolant reservoir 206 is cooled in the evaporator 104. At the third port of the first three-way valve 212, it splits into two paths. One path goes to the radiator 204 and the fan 2041 discharges the cold energy of the second coolant, thereby heating the first coolant. The other path enters the motor module 202 and is heated in the motor module 202, thereby recovering the waste heat of the motor module 202.

[0089] Please see Figure 10 When the crew cabin heating mode, motor module waste heat recovery mode and battery module waste heat recovery mode are activated simultaneously, the second coolant circuit includes: a second coolant reservoir 207, a second pump body 210, a third three-way valve 214, a heater 205, a fourth proportional three-way valve 220 and a fourth three-way valve 215.

[0090] The second coolant reservoir 207 is connected to the inlet of the second pump body 210. The outlet of the second pump body 210 is connected to the second inlet of the condenser 102. The second outlet of the condenser 102 is connected to the first port of the third three-way valve 214. The second port of the third three-way valve 214 is connected to the inlet of the heater 205. The outlet of the heater 205 is connected to the inlet of the heater core 2032. The outlet of the heater core 2032 is connected to the first port of the fourth proportional three-way valve 220. The second port of the fourth proportional three-way valve 220 is connected to the first port of the fourth three-way valve 215. The second port of the fourth three-way valve 215 is connected to the inlet of the second pump body 210. In other words, the second coolant in the second coolant reservoir 207 flows back to the second pump body 210 sequentially through the condenser 102, the third three-way valve 214, the heater 205, the heater core 2032, the fourth proportional three-way valve 220, and the fourth three-way valve 215. The second coolant in the second coolant reservoir 207 is heated in the condenser 102. The heated second coolant is then heated again in the heater 205 and then enters the heater core 2032. The heat is delivered to the crew compartment by the blower 2033 to achieve the purpose of heating the crew compartment.

[0091] Please see Figure 10 When the crew cabin heating mode, motor module waste heat recovery mode and battery module waste heat recovery mode are activated simultaneously, the first coolant circuit includes: a first coolant reservoir 206, a first pump body 209, a first three-way valve 212, a second three-way valve 213, a first proportional three-way valve 217, a second proportional three-way valve 218, a fifth three-way valve 216, a third proportional three-way valve 219, a third pump body 211 and a second check valve 222.

[0092] The first coolant reservoir 206 is connected to the inlet of the first pump body 209, the outlet of the first pump body 209 is connected to the first port of the first three-way valve 212, the third port of the first three-way valve 212 is connected to the inlet of the radiator 204, the outlet of the radiator 204 is connected to the third port of the second three-way valve 213, the third port of the first three-way valve 212 is also connected to the third port of the first proportional three-way valve 217, the second port of the first proportional three-way valve 217 is connected to the inlet of the motor module 202, the outlet of the motor module 202 is connected to the third port of the fifth three-way valve 216, and the first port of the fifth three-way valve 216 is connected to the second The third port of the three-way valve 213 is connected to the first port of the second proportional three-way valve 218. The third port of the second proportional three-way valve 218 is connected to the first port of the third proportional three-way valve 219. The third port of the third proportional three-way valve 219 is connected to the inlet of the third pump body 211. The outlet of the third pump body 211 is connected to the inlet of the second one-way valve 222. The outlet of the second one-way valve 222 is connected to the second inlet of the evaporator 104. The second port of the second proportional three-way valve 218 is connected to the second inlet of the evaporator 104. The second outlet of the evaporator 104 is connected to the inlet of the first pump body 209. The first coolant in the first coolant reservoir 206 passes through the first pump body 209 and enters the first three-way valve 212. A portion of the first coolant at the third port of the first three-way valve 212 enters the radiator 204. Another portion of the first coolant at the third port of the first three-way valve 212 passes through the first proportional three-way valve 217 and the motor module 202 and enters the fifth three-way valve 216. The first coolant at the outlet of the radiator 204 and the first coolant at the outlet of the fifth three-way valve 216 merge and pass through the second three-way valve 213 and enter the second proportional three-way valve 218. The first coolant at the third port of the second proportional three-way valve 218 passes through the third proportional three-way valve 219 and the third pump body 211 and enters the second one-way valve 222. The first coolant at the outlet of the second one-way valve 222 merges with the first coolant at the second port of the second proportional three-way valve 218 and flows back to the first pump body 209 through the evaporator 104.The first coolant in the first coolant reservoir 206 is cooled in the evaporator 104. At the third port of the first three-way valve 212, it splits into two paths. One path goes to the radiator 204, where the fan 2041 discharges the cold energy of the second coolant, thus heating the first coolant. The other path enters the motor module 202, where it is heated, thus recovering the waste heat of the motor module 202. The first coolant at the outlet of the radiator 204 and the first coolant at the outlet of the fifth three-way valve 216 merge and split into two paths at the second proportional three-way valve 218. One path enters the battery module 201 through the third port of the second proportional three-way valve 218, where it is heated, thus recovering the waste heat of the battery module 201. The other path flows back to the first pump body 209 through the second port of the second proportional three-way valve 218.

[0093] The R290-based thermal management system for new energy vehicles provided in this application involves refrigerant liquefying and releasing heat in condenser 102 and vaporizing and absorbing heat in evaporator 104. A first coolant exchanges heat with the refrigerant in evaporator 104 for cooling, and a second coolant exchanges heat with the refrigerant in condenser 102 for heating. The air conditioning module 203 is configured to selectively connect to the first coolant circuit and / or the second coolant circuit. As a result, the refrigerant does not enter the passenger compartment. Heat exchange between the refrigerant circuit and the coolant circuit is achieved through condenser 102 and evaporator 104. An indirect heat pump system is used to realize the cooling and heating modes of the passenger compartment, which is beneficial to improving the working efficiency of the R290-based thermal management system for new energy vehicles.

[0094] The R290-based thermal management system for new energy vehicles provided in this application utilizes the conversion of various valve systems to achieve multi-mode switching, enabling the recycling of all waste heat from components such as the battery module 201, motor module 202, and air conditioning module 203, thereby reducing the energy consumption of the R290-based thermal management system for new energy vehicles.

[0095] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0096] The above provides a detailed description of a new energy vehicle thermal management system based on R290 provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A thermal management system for new energy vehicles based on R290, characterized in that, include: Refrigerant module, coolant module, and air conditioning module; The refrigerant module includes a condenser (102) and an evaporator (104). The first inlet of the condenser (102) is used to input refrigerant. The first outlet of the condenser (102) is connected to the first inlet of the evaporator (104). The first outlet of the evaporator (104) is connected to the first inlet of the condenser (102). The refrigerant includes R290. The refrigerant enters the condenser (102) from the first inlet of the condenser (102) and liquefies and releases heat. After liquefying and releasing heat, the refrigerant enters the evaporator (104) through the first outlet of the condenser (102) and the first inlet of the evaporator (104) and vaporizes and absorbs heat. The coolant module includes a first coolant circuit and a second coolant circuit; the first coolant circuit is connected to the second inlet and the second outlet of the evaporator (104), and the first coolant in the first coolant circuit enters the evaporator (104) from the second inlet to exchange heat with the refrigerant for cooling; the second coolant circuit is connected to the second inlet and the second outlet of the condenser (102), and the second coolant in the second coolant circuit enters the condenser (102) from the second inlet to exchange heat with the refrigerant for heating; The air conditioning module is configured to selectively connect to the first coolant circuit and / or the second coolant circuit.

2. The new energy vehicle thermal management system based on R290 as described in claim 1, characterized in that, The air conditioning module (203) includes a cold air core (2031); When the occupant cabin cooling mode is activated, the first coolant circuit includes: a first coolant reservoir (206), a first pump body (209), a first three-way valve (212), a second three-way valve (213), a second proportional three-way valve (218), and a third proportional three-way valve (219). The first coolant reservoir (206) is connected to the inlet of the first pump body (209), the outlet of the first pump body (209) is connected to the first port of the first three-way valve (212), the second port of the first three-way valve (212) is connected to the first port of the second three-way valve (213), the second port of the second three-way valve (213) is connected to the first port of the second proportional three-way valve (218), the third port of the second proportional three-way valve (218) is connected to the first port of the third proportional three-way valve (219), the second port of the third proportional three-way valve (219) is connected to the inlet of the cold air core (2031), the outlet of the cold air core (2031) is connected to the second inlet of the evaporator (104), and the second outlet of the evaporator (104) is connected to the inlet of the first pump body (209).

3. The new energy vehicle thermal management system based on R290 as described in claim 2, characterized in that, It also includes a radiator (204), and the second coolant circuit includes: a second coolant reservoir (207), a second pump body (210), a third three-way valve (214), a first proportional three-way valve (217), a fifth three-way valve (216), and a fourth three-way valve (215); The second coolant reservoir (207) is connected to the inlet of the second pump body (210), the outlet of the second pump body (210) is connected to the second inlet of the condenser (102), the second outlet of the condenser (102) is connected to the first port of the third three-way valve (214), the third port of the third three-way valve (214) is connected to the first port of the first proportional three-way valve (217), the third port of the first proportional three-way valve (217) is connected to the inlet of the radiator (204), the outlet of the radiator (204) is connected to the first port of the fifth three-way valve (216), the third port of the fifth three-way valve (216) is connected to the third port of the fourth three-way valve (215), and the second port of the fourth three-way valve (215) is connected to the inlet of the second pump body (210).

4. The new energy vehicle thermal management system based on R290 as described in claim 2, characterized in that, It also includes a motor module (202) and a radiator (204). When the crew cabin cooling mode and the motor module cooling mode are activated simultaneously, the second coolant circuit includes: a second coolant reservoir (207), a second pump body (210), a third three-way valve (214), a first proportional three-way valve (217), a fifth three-way valve (216), and a fourth three-way valve (215). The second coolant reservoir (207) is connected to the inlet of the second pump body (210), the outlet of the second pump body (210) is connected to the second inlet of the condenser (102), the second outlet of the condenser (102) is connected to the first port of the third three-way valve (214), the third port of the third three-way valve (214) is connected to the first port of the first proportional three-way valve (217), the third port of the first proportional three-way valve (217) is connected to the inlet of the radiator (204), the outlet of the radiator (204) is connected to the first port of the fifth three-way valve (216), the second port of the fifth three-way valve (216) is connected to the inlet of the motor module (202), the outlet of the motor module (202) is connected to the third port of the fourth three-way valve (215), and the second port of the fourth three-way valve (215) is connected to the inlet of the second pump body (210).

5. The new energy vehicle thermal management system based on R290 as described in claim 1, characterized in that, It also includes a battery module (201) and a heat sink (204). When the battery module cooling mode is turned on, the first coolant circuit includes: a first coolant reservoir (206), a first pump body (209), a first three-way valve (212), a second three-way valve (213), a second proportional three-way valve (218), a third proportional three-way valve (219), a third pump body (211), and a second check valve (222). The first coolant reservoir (206) is connected to the inlet of the first pump body (209), the outlet of the first pump body (209) is connected to the first port of the first three-way valve (212), the second port of the first three-way valve (212) is connected to the first port of the second three-way valve (213), the second port of the second three-way valve (213) is connected to the first port of the second proportional three-way valve (218), the third port of the second proportional three-way valve (218) is connected to the first port of the third proportional three-way valve (219), the third port of the third proportional three-way valve (219) is connected to the inlet of the third pump body (211), the outlet of the third pump body (211) is connected to the inlet of the second one-way valve (222), the outlet of the second one-way valve (222) is connected to the second inlet of the evaporator (104), and the second outlet of the evaporator (104) is connected to the inlet of the first pump body (209). The second coolant circuit includes: a second coolant reservoir (207), a second pump body (210), a third three-way valve (214), a first proportional three-way valve (217), a fifth three-way valve (216), and a fourth three-way valve (215); The second coolant reservoir (207) is connected to the inlet of the second pump body (210), the outlet of the second pump body (210) is connected to the second inlet of the condenser (102), the second outlet of the condenser (102) is connected to the first port of the third three-way valve (214), the third port of the third three-way valve (214) is connected to the first port of the first proportional three-way valve (217), the third port of the first proportional three-way valve (217) is connected to the inlet of the radiator (204), the outlet of the radiator (204) is connected to the first port of the fifth three-way valve (216), the third port of the fifth three-way valve (216) is connected to the third port of the fourth three-way valve (215), and the second port of the fourth three-way valve (215) is connected to the inlet of the second pump body (210).

6. The new energy vehicle thermal management system based on R290 as described in claim 1, characterized in that, It also includes a battery module (201) and a heat sink (204), and the air conditioning module (203) includes a cold air core (2031); When the occupant cabin cooling mode and the battery module cooling mode are activated simultaneously, the first coolant circuit includes: a first coolant reservoir (206), a first pump body (209), a first three-way valve (212), a second three-way valve (213), a second proportional three-way valve (218), a third proportional three-way valve (219), a third pump body (211), and a second check valve (222); The first coolant reservoir (206) is connected to the inlet of the first pump body (209), the outlet of the first pump body (209) is connected to the first port of the first three-way valve (212), the second port of the first three-way valve (212) is connected to the first port of the second three-way valve (213), the second port of the second three-way valve (213) is connected to the first port of the second proportional three-way valve (218), the third port of the second proportional three-way valve (218) is connected to the first port of the third proportional three-way valve (219), and the third proportional three-way valve (219) is connected to the first port of the third proportional three-way valve (219). The second port of the third proportional three-way valve (219) is connected to the inlet of the cold air core (2031), the outlet of the cold air core (2031) is connected to the second inlet of the evaporator (104), the third port of the third proportional three-way valve (219) is connected to the inlet of the third pump body (211), the outlet of the third pump body (211) is connected to the inlet of the second one-way valve (222), the outlet of the second one-way valve (222) is connected to the second inlet of the evaporator (104), and the second outlet of the evaporator (104) is connected to the inlet of the first pump body (209); The second coolant circuit includes: a second coolant reservoir (207), a second pump body (210), a third three-way valve (214), a first proportional three-way valve (217), a fifth three-way valve (216), and a fourth three-way valve (215); The second coolant reservoir (207) is connected to the inlet of the second pump body (210), the outlet of the second pump body (210) is connected to the second inlet of the condenser (102), the second outlet of the condenser (102) is connected to the first port of the third three-way valve (214), the third port of the third three-way valve (214) is connected to the first port of the first proportional three-way valve (217), the third port of the first proportional three-way valve (217) is connected to the inlet of the radiator (204), the outlet of the radiator (204) is connected to the first port of the fifth three-way valve (216), the third port of the fifth three-way valve (216) is connected to the third port of the fourth three-way valve (215), and the second port of the fourth three-way valve (215) is connected to the inlet of the second pump body (210).

7. The new energy vehicle thermal management system based on R290 as described in claim 1, characterized in that, The air conditioning module (203) includes a cold air core (2031) and a warm air core (2032); When the crew cabin heating mode is activated, the second coolant circuit includes: a second coolant reservoir (207), a second pump body (210), a third three-way valve (214), a heater (205), a fourth proportional three-way valve (220), and a fourth three-way valve (215); The second coolant reservoir (207) is connected to the inlet of the second pump body (210), the outlet of the second pump body (210) is connected to the second inlet of the condenser (102), the second outlet of the condenser (102) is connected to the first port of the third three-way valve (214), the second port of the third three-way valve (214) is connected to the inlet of the heater (205), the outlet of the heater (205) is connected to the inlet of the heater core (2032), the outlet of the heater core (2032) is connected to the first port of the fourth proportional three-way valve (220), the second port of the fourth proportional three-way valve (220) is connected to the first port of the fourth three-way valve (215), and the second port of the fourth three-way valve (215) is connected to the inlet of the second pump body (210).

8. The new energy vehicle thermal management system based on R290 as described in claim 7, characterized in that, It also includes a radiator (204), and the first coolant circuit includes: a first coolant reservoir (206), a first pump body (209), a first three-way valve (212), a second three-way valve (213), and a second proportional three-way valve (218); The first coolant reservoir (206) is connected to the inlet of the first pump body (209), the outlet of the first pump body (209) is connected to the first port of the first three-way valve (212), the third port of the first three-way valve (212) is connected to the inlet of the radiator (204), the outlet of the radiator (204) is connected to the third port of the second three-way valve (213), the second port of the second three-way valve (213) is connected to the first port of the second proportional three-way valve (218), the second port of the second proportional three-way valve (218) is connected to the second inlet of the evaporator (104), and the second outlet of the evaporator (104) is connected to the inlet of the first pump body (209).

9. The new energy vehicle thermal management system based on R290 as described in claim 7, characterized in that, It also includes a radiator (204). When the crew cabin heating mode and the crew cabin dehumidification mode are turned on at the same time, the first coolant circuit includes: a first coolant reservoir (206), a first pump body (209), a first three-way valve (212), a second three-way valve (213), a second proportional three-way valve (218), and a third proportional three-way valve (219). The first coolant reservoir (206) is connected to the inlet of the first pump body (209), the outlet of the first pump body (209) is connected to the first port of the first three-way valve (212), the third port of the first three-way valve (212) is connected to the inlet of the radiator (204), the outlet of the radiator (204) is connected to the third port of the second three-way valve (213), the second port of the second three-way valve (213) is connected to the first port of the second proportional three-way valve (218), the third port of the second proportional three-way valve (218) is connected to the first port of the third proportional three-way valve (219), the second port of the third proportional three-way valve (219) is connected to the inlet of the cold air core (2031), the outlet of the cold air core (2031) is connected to the second inlet of the evaporator (104), the second port of the second proportional three-way valve (218) is connected to the second inlet of the evaporator (104), and the second outlet of the evaporator (104) is connected to the inlet of the first pump body (209).

10. The new energy vehicle thermal management system based on R290 as described in claim 8, characterized in that, It also includes a battery module (201) and a radiator (204). When the crew cabin heating mode and the battery module heating mode are activated simultaneously, the second coolant circuit further includes: a first one-way valve (221) and a third pump body (211). The third port of the fourth proportional three-way valve (220) is connected to the inlet of the battery module (201), the outlet of the battery module (201) is connected to the inlet of the third pump body (211), the outlet of the third pump body (211) is connected to the inlet of the first one-way valve (221), and the outlet of the first one-way valve (221) is connected to the first port of the fourth three-way valve (215).

11. The new energy vehicle thermal management system based on R290 as described in claim 7, characterized in that, It also includes a motor module (202) and a radiator (204). When the crew cabin heating mode and the motor module waste heat recovery mode are activated simultaneously, the first coolant circuit includes: a first coolant reservoir (206), a first pump body (209), a first three-way valve (212), a second three-way valve (213), a first proportional three-way valve (217), a second proportional three-way valve (218), and a fifth three-way valve (216). The first coolant reservoir (206) is connected to the inlet of the first pump body (209), the outlet of the first pump body (209) is connected to the first port of the first three-way valve (212), the third port of the first three-way valve (212) is connected to the inlet of the radiator (204), the outlet of the radiator (204) is connected to the third port of the second three-way valve (213), the third port of the first three-way valve (212) is also connected to the third port of the first proportional three-way valve (217), and the second port of the first proportional three-way valve (217) is connected to the... The inlet of the motor module (202) is connected to the third port of the fifth three-way valve (216), the first port of the fifth three-way valve (216) is connected to the third port of the second three-way valve (213), the second port of the second three-way valve (213) is connected to the first port of the second proportional three-way valve (218), the second port of the second proportional three-way valve (218) is connected to the second inlet of the evaporator (104), and the second outlet of the evaporator (104) is connected to the inlet of the first pump body (209).

12. The new energy vehicle thermal management system based on R290 as described in claim 7, characterized in that, It also includes a battery module (201), a motor module (202) and a radiator (204). When the crew cabin heating mode, the motor module waste heat recovery mode and the battery module waste heat recovery mode are activated simultaneously, the first coolant circuit includes: a first coolant reservoir (206), a first pump body (209), a first three-way valve (212), a second three-way valve (213), a first proportional three-way valve (217), a second proportional three-way valve (218), a fifth three-way valve (216), a third proportional three-way valve (219), a third pump body (211) and a second check valve (222). The first coolant reservoir (206) is connected to the inlet of the first pump body (209), the outlet of the first pump body (209) is connected to the first port of the first three-way valve (212), the third port of the first three-way valve (212) is connected to the inlet of the radiator (204), the outlet of the radiator (204) is connected to the third port of the second three-way valve (213), the third port of the first three-way valve (212) is also connected to the third port of the first proportional three-way valve (217), the second port of the first proportional three-way valve (217) is connected to the inlet of the motor module (202), the outlet of the motor module (202) is connected to the third port of the fifth three-way valve (216), and the first port of the fifth three-way valve (216) is connected to the second The third port of the three-way valve (213), the second port of the second three-way valve (213) is connected to the first port of the second proportional three-way valve (218), the third port of the second proportional three-way valve (218) is connected to the first port of the third proportional three-way valve (219), the third port of the third proportional three-way valve (219) is connected to the inlet of the third pump body (211), the outlet of the third pump body (211) is connected to the inlet of the second one-way valve (222), the outlet of the second one-way valve (222) is connected to the second inlet of the evaporator (104), the second port of the second proportional three-way valve (218) is connected to the second inlet of the evaporator (104), and the second outlet of the evaporator (104) is connected to the inlet of the first pump body (209).

13. The new energy vehicle thermal management system based on R290 as described in claim 1, characterized in that, The refrigerant circuit also includes: a compressor (101), a regenerator (103), and a gas-liquid separator (105). The compressor (101) outlet is connected to the first inlet of the condenser (102), the condenser (102) first outlet is connected to the first inlet of the regenerator (103), the regenerator (103) first outlet is connected to the first inlet of the evaporator (104), the evaporator (104) first outlet is connected to the second inlet of the regenerator (103), the regenerator (103) second outlet is connected to the inlet of the gas-liquid separator (105), and the gas-liquid separator (105) outlet is connected to the inlet of the compressor (101).

14. The new energy vehicle thermal management system based on R290 as described in claim 1, characterized in that, It also includes a battery module (201), and the coolant module further includes a third coolant circuit, the third coolant circuit including: a third coolant reservoir (208) and a third pump body (211), the third coolant reservoir (208) being connected to the inlet of the third pump body (211), the outlet of the third pump body (211) being connected to the inlet of the battery module (201), and the outlet of the battery module (201) being connected to the inlet of the third pump body (211).

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