Integrated thermal management system and control method

Abstract

The present invention relates to the technical fields of automotive thermal management and battery thermal management, and in particular to an integrated thermal management system and control method. The refrigerant side of the thermal management system includes a compressor, a water heater, a chiller assembly, an integrated gas-liquid separation and heat recovery device, and a refrigerant pipeline. The present invention adopts an integrated system architecture and a secondary heat exchange cycle, and only uses two heat exchangers on the refrigerant side, which reduces the system's components, greatly reduces the system's complexity, makes the system more compact, reduces the system's refrigerant charge and the number of pipelines, thereby improving the system's thermal performance and reliability. By matching the coolant side circulation system, the present invention realizes functions such as passenger compartment thermal management, battery thermal management, motor thermal management, and waste heat recovery.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile thermal management and battery thermal management, and in particular to an integrated thermal management system and a control method. Background Art

[0002] Existing automotive thermal management systems typically use a relatively complex system architecture and a single heat exchange cycle. The refrigerant-side system architecture connects multiple refrigeration components and reverses the refrigerant through shut-off valves or multi-way valves to achieve cooling and heating.

[0003] When multiple components need to be cooled or waste heat recovered, more heat exchangers are required on the refrigerant side. Due to the large number and dispersion of components, the system needs to be filled with more refrigerant, reducing system efficiency and safety. Furthermore, the large number of pipe joints increases the risk of system leaks. Systems that use refrigerant reversal to switch between cooling and heating cannot simultaneously install both a gas-liquid separator and a liquid-gas separator, limiting the full potential of the system. Summary of the Invention

[0004] The purpose of the present invention is to provide an integrated thermal management system and control method, which has the advantages of reducing the number of system components, greatly reducing the complexity of the system, making the system more compact, reducing the number of connecting pipes and joints, thereby reducing system leakage and improving reliability, and solving the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: an integrated thermal management system, the thermal management system includes a refrigerant side, the refrigerant side includes a compressor, a water heater, a water chiller assembly, an integrated gas-liquid separation and heat recovery device and a refrigerant pipeline; the integrated gas-liquid separation and heat recovery device includes an inlet A, an outlet D corresponding to the inlet A, an inlet C and an outlet B corresponding to the inlet C, the compressor is used to compress the refrigerant, and the inlet of the compressor and the outlet D are connected through the refrigerant pipeline, the water heater is used to cool the coolant and the high-temperature The refrigerant exchanges heat to heat the coolant, the water heater is provided with a water heater inlet and a water heater outlet, the outlet of the compressor is connected to the water heater inlet through the refrigerant pipeline, and the water heater outlet is connected to the inlet C through the refrigerant pipeline, the water chiller assembly is used to exchange heat between the coolant and the low-temperature refrigerant to cool the coolant, the water chiller assembly is provided with a water chiller assembly inlet and a water chiller assembly outlet, the water chiller assembly inlet is connected to the outlet B through the refrigerant pipeline, and the water chiller assembly outlet is connected to the inlet A through the refrigerant pipeline.

[0006] Preferably, the refrigerant side includes a control system, and the control system is used to receive instructions and perform thermal management control.

[0007] Preferably, the water chiller assembly includes a water chiller and a throttling element.

[0008] Preferably, the thermal management system includes a coolant side.

[0009] Preferably, water or antifreeze is used as the coolant on the coolant side.

[0010] Preferably, the refrigerant side uses R290, R134a or R744 as the refrigerant.

[0011] Preferably, the thermal management system is used for thermal management of a vehicle, the vehicle including a passenger compartment, a battery, and a motor, the coolant side including a HVAC component including a heater and an evaporator, and the coolant side including the following circulation:

[0012] It includes a loop A, wherein the coolant circulation route of the loop A includes the motor, the water heater, the heater and the motor in sequence;

[0013] including a loop B, wherein the coolant circulation route of the loop B successively includes the battery, the water chiller assembly, and the battery;

[0014] including a loop C, wherein the coolant circulation route of the loop C successively includes the battery, the water chiller assembly, the evaporator, and the battery;

[0015] comprising a loop D, wherein the coolant circulation route of the loop D successively includes the evaporator, the chiller assembly and the evaporator;

[0016] comprising a loop E, wherein the coolant circulation route of the loop E successively includes the heater, the water heater and the heater;

[0017] comprising a loop F, wherein the coolant circulation route of the loop F successively includes the heater, the battery, the water heater, and the heater;

[0018] It includes a loop G, and the coolant circulation route of the loop G includes the motor, the chiller assembly and the motor in sequence.

[0019] Preferably, the coolant side includes a water tank, a water pump, a valve and a coolant pipeline.

[0020] Preferably, the water pump includes a first water pump and a second water pump, the valve includes a first three-way valve, a second three-way valve, a third three-way valve, a first four-way valve and a second four-way valve, and the HVAC component, the water tank, the water pump, the valve and the coolant pipeline are configured as follows:

[0021] The coolant circulation route of the loop A includes the motor, the first three-way valve, the water tank, the first four-way valve, the water heater, the heater, the second four-way valve and the motor in sequence;

[0022] The coolant circulation route of the loop B includes the battery, the first four-way valve, the second water pump, the water chiller assembly, the second three-way valve, the second four-way valve and the battery in sequence;

[0023] The coolant circulation route of the loop C includes the battery, the first four-way valve, the second water pump, the chiller assembly, the second three-way valve, the evaporator, the second four-way valve, the third three-way valve and the battery in sequence;

[0024] The coolant circulation route of the loop D sequentially includes the evaporator, the second four-way valve, the third three-way valve, the first four-way valve, the second water pump, the chiller assembly, the second three-way valve and the evaporator;

[0025] The coolant circulation route of the loop E includes the heater, the first water pump, the second four-way valve, the third three-way valve, the first four-way valve, the water heater and the heater in sequence;

[0026] The coolant circulation route of the loop F includes the heater, the first water pump, the second four-way valve, the third three-way valve, the battery, the first four-way valve, the water heater and the heater in sequence;

[0027] The cycle G includes a cycle G1, and the coolant circulation route of the cycle G1 includes the motor, the first three-way valve, the water tank, the first four-way valve, the second water pump, the chiller assembly, the second three-way valve, the second four-way valve and the motor in sequence;

[0028] The circulation G includes circulation G2, and the coolant circulation route of the circulation G2 includes the first three-way valve, the first four-way valve, the second water pump, the chiller assembly, the second three-way valve, the second four-way valve and the motor in sequence.

[0029] A control method for an integrated thermal management system is provided, which is used to control an integrated thermal management system according to the technical solution of the present invention. The control system obtains instructions and performs thermal management control in the following mode:

[0030] If the instruction is to cool the motor, then the loop A is performed;

[0031] If the instruction is to cool the battery and the motor, the cycle A and the cycle B are performed;

[0032] If the instruction is to cool the passenger compartment, the battery and the motor, then the cycle A and the cycle C are performed;

[0033] If the instruction is to cool the passenger compartment and the battery, the cycle A and the cycle C are performed;

[0034] If the instruction is to cool the passenger compartment, the cycle A and the cycle D are performed;

[0035] If the instruction is to cool and dehumidify the passenger compartment, the cycle A and the cycle D are performed, and the damper of the HVAC component is adjusted;

[0036] If the instruction is to heat the passenger compartment, the loop G and the loop E are performed;

[0037] If the instruction is to heat the passenger compartment and heat the battery, then the loop G and the loop F are performed;

[0038] If the instruction is to heat the passenger compartment, heat the battery, and cool the motor, or if the instruction is to heat the passenger compartment, heat the battery, and recover waste heat from the motor, then the cycle G is performed.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. The thermal management system of the present invention has fewer components on the refrigerant side and only uses two heat exchangers. At the same time, it adopts an integrated gas-liquid separation and heat recovery device, integrating the liquid storage function, gas-liquid separation function, and heat recovery function into one, reducing the number of system components, greatly reducing the complexity of the system, making the system more compact, and reducing the number of connecting pipes and joints, thereby reducing system leakage and improving reliability.

[0041] 2. The refrigerant side of the thermal management system of this invention reduces the refrigerant charge within the system, thereby improving system performance. Furthermore, the refrigerant does not reverse during the cooling and heating cycles, fully utilizing the gas-liquid separation, liquid-gas separation, and heat recovery functions of the integrated gas-liquid separation and heat recovery device to improve system efficiency. The deep integration of components facilitates modular and standardized design. By matching the appropriate coolant-side circulation architecture, the system can be flexibly applied to thermal management of vehicle passenger compartments, onboard batteries, energy storage batteries, and equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1This is a system architecture diagram of the refrigerant side of the integrated thermal management system of the present invention;

[0043] Figure 2 This is a complete system architecture diagram of the integrated thermal management system of the present invention;

[0044] Figure 3 A diagram of a control method for an integrated thermal management system according to the present invention;

[0045] Figure 4 This is a system architecture diagram of the refrigerant side of an existing vehicle thermal management system;

[0046] Reference numerals: 100 - refrigerant side; 101 - compressor; 102 - water heater; 103 - water chiller; 104 - throttling element; 105 - hot water inlet; 106 - cold water outlet; 107 - cold water inlet; 108 - hot water outlet; 109 - water heater inlet; 110 - water heater outlet; 111 - water heater inlet; 112 - water heater outlet; 1131 - inlet A; 1132 - outlet B; 1134 - inlet C; 1135 - outlet D; 114 - refrigerant pipeline; 200 - coolant side; 201 - HVAC; 2011 - heater; 2022 - evaporator; 202 - first water pump; 203-Second water pump; 204-Water tank; 205-First three-way valve; 206-Second three-way valve; 207-Third three-way valve; 208-First four-way valve; 209-Second four-way valve; 210-Coolant pipeline; 301-Motor; 302-Battery; 400-Refrigerant side; 401-Waste heat collector; 402-Outdoor heat exchanger; 403-Stop valve; 404-Stop valve; 405-Stop valve; 406-Stop valve; 407-Compressor; 408-Gas-liquid separator; 409-Regenerator; 410-Indoor heat exchanger; 411-Battery water cooler; 412-Throttling element; 413-Throttling element. DETAILED DESCRIPTION

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0048] like Figure 4Figure 4 shows the schematic diagram of the refrigerant side 400 of a conventional vehicle thermal management system. The system includes multiple interconnected refrigeration components, including a waste heat recovery unit 401, an outdoor heat exchanger 402, a compressor 407, a gas-liquid separator 408, a regenerator 409, an outdoor heat exchanger 402, a throttling element 412, a throttling element 413, and a battery water cooler 411. Cooling and heating are achieved by switching the refrigerant flow using stop valves 403, 404, 405, and 406, or by using a four-way valve (not shown). When multiple components are used for cooling, heating, or waste heat recovery, the refrigerant side 400 requires more heat exchangers. Due to the large number of components and their relative dispersion, a larger amount of refrigerant must be charged to the system, reducing its efficiency and safety. Furthermore, the numerous pipe connections make system leaks more likely. Systems that use refrigerant switching to switch between cooling and heating cannot simultaneously incorporate both the gas-liquid separator 408 and a liquid-gas separator, hindering full system performance.

[0049] like Figure 1 Figure 1 is a schematic diagram of the structure of the refrigerant side 100 of an integrated thermal management system provided by the present invention. Refrigerant side 100 includes a compressor 101, a water chiller assembly, a water heater 102, an integrated gas-liquid separation and heat recovery device 113, and refrigerant piping 114. Integrated gas-liquid separation and heat recovery device 113 includes inlet A 1131, outlet D 1134 corresponding to inlet A 1131, inlet C 1133, and outlet B 1132 corresponding to inlet C 1133. Compressor 101 is used to compress refrigerant, and the inlet of compressor 101 and outlet D 1134 are connected via refrigerant piping 114. Water heater 102 is used to heat the coolant by exchanging heat between the coolant and the high-temperature refrigerant. Water heater 102 is provided with a water heater inlet 109 and a water heater outlet 110. The outlet of compressor 101 is connected to water heater inlet 109 via a refrigerant line 114, and water heater outlet 110 is connected to inlet C 1133 via a refrigerant line 114. The water chiller assembly is used to exchange heat between the coolant and the low-temperature refrigerant to cool the coolant. The water chiller assembly is provided with a water chiller assembly inlet 111 and a water chiller assembly outlet 112. Water chiller assembly inlet 111 is connected to outlet B 1132 via a refrigerant line 114, and water chiller assembly outlet 112 is connected to inlet A 1131 via a refrigerant line 114.

[0050] Specifically, the refrigerant side 100 of the present invention is equipped with a control system (not shown), which is used to receive instructions and perform thermal management control. In this embodiment, the control system is configured to receive instructions, including external instructions, internal program setting instructions, and program execution instructions, and then control the refrigerant circulation of the refrigerant side 100. The intelligent and refined structural design helps optimize system controllability.

[0051] Specifically, the water chiller assembly of the present invention includes a water chiller 103 and a throttling element 104. In this embodiment, the water chiller 103 is used to exchange heat between the coolant and the low-temperature refrigerant to cool the coolant. The throttling element 104 is used to reduce the pressure of the high-pressure refrigerant from the integrated gas-liquid separation and heat recovery device 113 into a low-pressure low-temperature refrigerant. In this embodiment, water or antifreeze is used as the coolant. Of course, other media can also be used as the coolant, all of which fall within the scope of protection of the present invention. Preferably, the antifreeze is a mixture of ethylene glycol and water. Preferably, the refrigerant side 100 of the present invention uses R290, R134a or R744 as the refrigerant, which has a good cooling effect and is less environmentally polluting.

[0052] The working principle of the refrigerant side 100 of the integrated thermal management system provided by the present invention is as follows: during operation, the compressor 101 compresses the refrigerant into a high-temperature and high-pressure state. After the high-temperature and high-pressure refrigerant enters the water heater 102 from the water heater inlet 109, it exchanges heat with the cold water entering the water heater 102 to heat the cold water. At the same time, the refrigerant is cooled to a high-pressure and medium-temperature refrigerant. The refrigerant flows out of the water heater 102 from the water heater outlet 110 and enters the integrated gas-liquid separation and heat recovery device 113 from the inlet C 1133; the refrigerant is separated in the integrated gas-liquid separation and heat recovery device 113, and the uncondensed gas remains in the integrated gas-liquid separation and heat recovery device 113, while the liquid is discharged from the outlet B 1132 discharges the integrated gas-liquid separation and heat recovery device 113; at the same time, it exchanges heat with the low-temperature and low-pressure refrigerant at the chiller assembly outlet 112 to further reduce the temperature (increase the supercooling degree); the supercooled refrigerant liquid enters the throttling element 104 from the chiller assembly inlet 111, undergoes throttling expansion, and enters the chiller 103, evaporates and absorbs heat in the chiller 103, and cools the hot water entering the chiller 103; the evaporated refrigerant is discharged from the chiller assembly outlet 112 of the chiller 103, and enters the integrated gas-liquid separation and heat recovery device 113 from the inlet A 1131 for separation, the unevaporated liquid remains in the integrated gas-liquid separation and heat recovery device 113, and the gas is discharged from the integrated gas-liquid separation and heat recovery device 113 from the outlet D 1134 and enters the compressor 101 to continue compression.

[0053] The refrigerant side 100 of the thermal management system of the present invention uses only two heat exchangers, the water heater 102 and the water chiller 103, and integrates the gas-liquid separation, liquid-gas separation, and heat recovery functions into the integrated gas-liquid separation and heat recovery device 113, which reduces the number of components in the system, greatly reduces the complexity of the system, makes the system more compact, reduces the system refrigerant charge and the number of pipelines, thereby improving the thermal performance and reliability of the system. In particular, the refrigerant side 100 of the thermal management system of the present invention adopts an integrated design to achieve modularization and standardization, which helps to match with a variety of coolant side designs to build a thermal management system. In particular, by matching a circulation system of the coolant side 200 (please refer to Figure 2 ), which can realize functions such as passenger compartment thermal management, battery 302 thermal management, motor 301 thermal management and waste heat recovery.

[0054] like Figure 2 Figure 2 shows the overall structure of an integrated thermal management system according to the present invention, comprising a refrigerant side 100 and a coolant side 200. The coolant side 200 includes a HVAC component 201, a water tank 204, a water pump, valves, and coolant lines 210. In this embodiment, the thermal management system is used for vehicle thermal management, including thermal management of multiple components such as the vehicle's passenger compartment (not shown), battery 302, and motor 303. The passenger compartment is provided with a HVAC component 201, preferably including a heater 2011 and an evaporator 2012.

[0055] Preferably, the coolant circulation route of the coolant side 200 is configured to include the following circulation:

[0056] The cooling liquid circulation route of the loop A includes the motor 301, the water heater 2011, the heater 2011 and the motor 301 in sequence;

[0057] including loop B, wherein the coolant circulation route of loop B includes battery 302, water chiller assembly and battery 302 in sequence;

[0058] Including loop C, the coolant circulation route of loop C includes battery 302, chiller assembly, evaporator 2022 and battery 302 in sequence;

[0059] Including loop D, the coolant circulation route of loop D includes evaporator 2022, chiller assembly and evaporator 2022 in sequence;

[0060] Including loop E, the coolant circulation route of loop E includes heater 2011, water heater 102 and heater 2011 in sequence;

[0061] Including loop F, the coolant circulation route of loop F includes heater 2011, battery 302, water heater 102 and heater 2011 in sequence;

[0062] It includes a loop G, and the coolant circulation route of the loop G includes the motor 301, the chiller assembly and the motor 301 in sequence.

[0063] Preferably, in this embodiment, multiple water pumps are provided, including a first water pump 202 and a second water pump 203, for providing power for the coolant circulation. Multiple valves are also provided, including a first three-way valve 205, a second three-way valve 206, a third three-way valve 207, a first four-way valve 208, and a second four-way valve 209. In this embodiment, the various components of the coolant side 200 are connected through the coolant pipeline 210, forming the following multiple circulation pipelines:

[0064] Circulation A: The coolant circulation route of circulation A includes the motor 301, the first three-way valve 205, the water tank 204, the first four-way valve 208, the water heater 102, the heater 2011, the second four-way valve 209 and the motor 301 in sequence;

[0065] The coolant circulation route of loop B includes the battery 302, the first four-way valve 208, the second water pump 203, the chiller assembly, the second three-way valve 206, the second four-way valve 209 and the battery 302 in sequence;

[0066] The coolant circulation route of loop C includes the battery 302, the first four-way valve 208, the second water pump 203, the chiller assembly, the second three-way valve 206, the evaporator 2012, the second four-way valve 209, the third three-way valve 207 and the battery 302 in sequence;

[0067] The coolant circulation route of loop D includes the evaporator 2012, the second four-way valve 209, the third three-way valve 207, the first four-way valve 208, the second water pump 203, the chiller assembly, the second three-way valve 206 and the evaporator 2012 in sequence;

[0068] The coolant circulation route of loop E includes the heater 2011, the first water pump 202, the second four-way valve 209, the third three-way valve 207, the first four-way valve 208, the water heater 102 and the heater 2011 in sequence;

[0069] The coolant circulation route of loop F includes the heater 2011, the first water pump 202, the second four-way valve 209, the third three-way valve 207, the battery 302, the first four-way valve 208, the water heater 102 and the heater 2011 in sequence;

[0070] Circulation G includes circulation G1, and the coolant circulation route of circulation G1 includes motor 301, first three-way valve 205, water tank 204, first four-way valve 208, second water pump 203, chiller assembly, second three-way valve 206, second four-way valve 208 and motor 301 in sequence;

[0071] Circulation G includes circulation G2, and the coolant circulation route of circulation G2 includes the first three-way valve 205, the first four-way valve 208, the second water pump 203, the chiller assembly, the second three-way valve 206, the second four-way valve 209 and the motor 301 in sequence.

[0072] It should be understood that this embodiment is only a preferred implementation method. In other embodiments, the number and position of water pumps, the type, number and position of valves, the number and position of water tanks 204, the coolant pipes 210, etc. can adopt other arrangements, and other arrangements such as adding other vehicle cooling components in addition to the battery 302, motor 301, and passenger compartment to the system are all within the scope of protection of the present invention.

[0073] The present invention also provides a control method for an integrated thermal management system, which is used to control the thermal management system of the technical solution of the present invention. In one embodiment of the integrated thermal management system for vehicle thermal management, the control method of the integrated thermal management system of the present invention has the following working modes:

[0074] The control system receives the instruction and performs thermal management control in the following mode:

[0075] Mode 1: If the instruction is to cool the motor 301, cycle A is performed; the coolant circulation route of cycle A includes the motor 301, the water heater 2011, the heater 2011 and the motor 301 in sequence;

[0076] Mode 2: If the instruction is to cool the battery 302 and the motor 301, then loop A and loop B are performed; the coolant circulation route of loop A includes the motor 301, the water heater 2011, the heater 2011, and the motor 301 in sequence; the coolant circulation route of loop B includes the battery 302, the water cooler assembly, and the battery 302 in sequence;

[0077] Mode 3: If the command is to cool the passenger compartment, battery 302, and motor 301, then cycles A and C are performed. The coolant circulation route of cycle A includes motor 301, water heater 2011, heater 2011, and motor 301 in sequence. The coolant circulation route of cycle C includes battery 302, water cooler assembly, evaporator 2022, and battery 302 in sequence.

[0078] Mode 4: If the command is to cool the passenger compartment and the battery 302, then cycles A and C are performed. The coolant circulation route of cycle A includes the motor 301, the water heater 2011, the heater 2011, and the motor 301 in sequence. The coolant circulation route of cycle C includes the battery 302, the chiller assembly, the evaporator 2022, and the battery 302 in sequence.

[0079] Mode 5: If the command is to cool the passenger compartment, then cycles A and D are performed. The coolant circulation route of cycle A includes the motor 301, the water heater 2011, the heater 2011, and the motor 301 in sequence. The coolant circulation route of cycle D includes the evaporator 2022, the water cooler assembly, and the evaporator 2022 in sequence.

[0080] Mode 6: If the command is for passenger compartment cooling and dehumidification, cycles A and D are performed, and the damper of the HVAC unit 201 is adjusted. The coolant circulation route of cycle A includes the motor 301, the water heater 2011, the heater 2011, and the motor 301 in sequence. The coolant circulation route of cycle D includes the evaporator 2022, the water cooler assembly, and the evaporator 2022 in sequence.

[0081] Mode 7: If the command is to heat the passenger compartment, loop G and loop E are performed. The coolant circulation route of loop G includes the motor 301, the chiller assembly, and the motor 301 in sequence. The coolant circulation route of loop E includes the heater 2011, the water heater 102, and the heater 2011 in sequence.

[0082] Mode 8: If the command is to heat the passenger compartment and heat the battery 302, then cycle G and cycle F are performed. The coolant circulation route of cycle G includes the motor 301, the chiller assembly, and the motor 301 in sequence. The coolant circulation route of cycle F includes the heater 2011, the battery 302, the water heater 102, and the heater 2011 in sequence.

[0083] Mode 9: If the instruction is to heat the passenger compartment, heat the battery 302 and cool the motor 301, or the instruction is to heat the passenger compartment, heat the battery 302 and recover waste heat from the motor 301, then cycle G is performed; the coolant circulation route of cycle G includes the motor 301, the chiller assembly and the motor 301 in sequence.

[0084] Preferably, Figure 3 As shown, Figure 1-Figure 2 Taking the integrated thermal management system of the embodiment shown as an example, a control method of an integrated thermal management system of the present invention is shown. Preferably, the control method of the integrated thermal management system of the present invention adopts the following working mode:

[0085] The control system receives the instruction and performs thermal management control in the following mode:

[0086] Mode 1: If the instruction is to cool the motor 301, cycle A is performed; the coolant circulation route of cycle A includes the motor 301, the first three-way valve 205, the water tank 204, the first four-way valve 208, the water heater 102, the heater 2011, the second four-way valve 209 and the motor 301 in sequence;

[0087] Mode 2: If the instruction is to cool the battery 302 and the motor 301, then loop A and loop B are performed; the coolant circulation route of loop A includes the motor 301, the first three-way valve 205, the water tank 204, the first four-way valve 208, the water heater 102, the heater 2011, the second four-way valve 209, and the motor 301 in sequence; the coolant circulation route of loop B includes the battery 302, the first four-way valve 208, the second water pump 203, the chiller assembly, the second three-way valve 206, the second four-way valve 209, and the battery 302 in sequence;

[0088] Mode 3: If the command is to cool the passenger compartment, battery 302, and motor 301, then cycles A and C are performed; Cycle A: The coolant circulation route of cycle A includes, in sequence, the motor 301, the first three-way valve 205, the water tank 204, the first four-way valve 208, the water heater 102, the heater 2011, the second four-way valve 209, and the motor 301; the coolant circulation route of cycle C includes, in sequence, the battery 302, the first four-way valve 208, the second water pump 203, the chiller assembly, the second three-way valve 206, the evaporator 2012, the second four-way valve 209, the third three-way valve 207, and the battery 302;

[0089] Mode 4: If the instruction is to cool the passenger compartment and the battery 302, then cycle A and cycle C are performed; cycle A, the coolant circulation route of cycle A includes the motor 301, the first three-way valve 205, the water tank 204, the first four-way valve 208, the water heater 102, the heater 2011, the second four-way valve 209 and the motor 301 in sequence; the coolant circulation route of cycle C includes the battery 302, the first four-way valve 208, the second water pump 203, the chiller assembly, the second three-way valve 206, the evaporator 2012, the second four-way valve 209, the third three-way valve 207 and the battery 302 in sequence;

[0090] Mode 5: If the command is to cool the passenger compartment, cycles A and D are executed. The coolant circulation route of cycle A includes, in sequence, the motor 301, the first three-way valve 205, the water tank 204, the first four-way valve 208, the water heater 102, the heater 2011, the second four-way valve 209, and the motor 301. The coolant circulation route of cycle D includes, in sequence, the evaporator 2012, the second four-way valve 209, the third three-way valve 207, the first four-way valve 208, the second water pump 203, the chiller assembly, the second three-way valve 206, and the evaporator 2012.

[0091] Mode 6: If the command is for passenger compartment cooling and dehumidification, cycles A and D are executed, and the damper of the HVAC unit 201 is adjusted. The coolant circulation route of cycle A includes, in sequence, the motor 301, the first three-way valve 205, the water tank 204, the first four-way valve 208, the water heater 102, the heater 2011, the second four-way valve 209, and the motor 301. The coolant circulation route of cycle D includes, in sequence, the evaporator 2012, the second four-way valve 209, the third three-way valve 207, the first four-way valve 208, the second water pump 203, the chiller assembly, the second three-way valve 206, and the evaporator 2012.

[0092] Mode 7: If the command is to heat the passenger compartment, cycle G and cycle E are performed; cycle G includes cycle G1, where the coolant circulation route of cycle G1 includes, in sequence, the motor 301, the first three-way valve 205, the water tank 204, the first four-way valve 208, the second water pump 203, the chiller assembly, the second three-way valve 206, the second four-way valve 208, and the motor 301; cycle G includes cycle G2, where the coolant circulation route of cycle G2 includes, in sequence, the first three-way valve 205, the first four-way valve 208, the second water pump 203, the chiller assembly, the second three-way valve 206, the second four-way valve 209, and the motor 301; the coolant circulation route of cycle E includes, in sequence, the heater 2011, the first water pump 202, the second four-way valve 209, the third three-way valve 207, the first four-way valve 208, the water heater 102, and the heater 2011;

[0093] Mode 8: If the instruction is to heat the passenger compartment and heat the battery 302, then cycle G and cycle F are performed; cycle G includes cycle G1, where the coolant circulation route of cycle G1 includes the motor 301, the first three-way valve 205, the water tank 204, the first four-way valve 208, the second water pump 203, the chiller assembly, the second three-way valve 206, the second four-way valve 208, and the motor 301 in sequence; cycle G includes cycle G2, where the coolant circulation route of cycle G2 includes the first three-way valve 205, the first four-way valve 208, the second water pump 203, the chiller assembly, the second three-way valve 206, the second four-way valve 209, and the motor 301 in sequence; the coolant circulation route of cycle F includes the heater 2011, the first water pump 202, the second four-way valve 209, the third three-way valve 207, the battery 302, the first four-way valve 208, the water heater 102, and the heater 2011 in sequence;

[0094] Mode 9: If the instruction is to heat the passenger compartment, heat the battery 302 and cool the motor 301, then cycle G2 is performed. The coolant circulation route of cycle G2 includes the first three-way valve 205, the first four-way valve 208, the second water pump 203, the chiller assembly, the second three-way valve 206, the second four-way valve 209 and the motor 301 in sequence; if the instruction is to heat the passenger compartment, heat the battery 302 and recover the waste heat of the motor 301, then cycle G1 is performed. The coolant circulation route of cycle G1 includes the motor 301, the first three-way valve 205, the water tank 204, the first four-way valve 208, the second water pump 203, the chiller assembly, the second three-way valve 206, the second four-way valve 208 and the motor 301 in sequence.

[0095] In summary, the thermal management system of the present invention adopts an integrated system architecture and a secondary heat exchange cycle, using only two heat exchangers on the refrigerant side 100, while integrating the gas-liquid separation, liquid-gas separation, and heat recovery functions, reducing the system's components, greatly reducing the system's complexity, making the system more compact, and reducing the system's refrigerant charge and the number of pipelines, thereby improving the system's thermal performance and reliability. By matching the coolant side 200 circulation system, functions such as passenger compartment thermal management, battery 302 thermal management, motor 301 thermal management, and waste heat recovery are realized.

[0096] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0097] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An integrated thermal management system, characterized in that: The thermal management system includes a refrigerant side (100), the refrigerant side (100) includes a compressor (101), a water heater (102), a water chiller assembly, an integrated gas-liquid separation and heat recovery device (113) and a refrigerant pipeline (114), the integrated gas-liquid separation and heat recovery device (113) includes an inlet A (1131), an outlet D (1134) corresponding to the inlet A (1131), an inlet C (1133) and an outlet B (1132) corresponding to the inlet C (1133), the compressor (101) is used to compress the refrigerant, and the inlet of the compressor (101) and the outlet D (1134) are connected through the refrigerant pipeline (114), the water heater (102) is used to exchange heat between the coolant and the high-temperature refrigerant to heat the cooling medium. Liquid, the water heater (102) is provided with a water heater inlet (109) and a water heater outlet (110), the outlet of the compressor (101) is communicated with the water heater inlet (109) through the refrigerant pipeline (114), and the water heater outlet (110) is communicated with the inlet C (1133) through the refrigerant pipeline (114), the water chiller assembly is used to exchange heat between the coolant and the low-temperature refrigerant to cool the coolant, the water chiller assembly is provided with a water chiller assembly inlet (111) and a water chiller assembly outlet (112), the water chiller assembly inlet (111) is communicated with the outlet B (1132) through the refrigerant pipeline (114), and the water chiller assembly outlet (112) is communicated with the inlet A (1131) through the refrigerant pipeline (114).

2. The integrated thermal management system according to claim 1, characterized in that: The refrigerant side (100) includes a control system for receiving instructions and performing thermal management control.

3. The integrated thermal management system according to claim 1, characterized in that: The water cooler assembly includes a water cooler (103) and a throttling element (104).

4. The integrated thermal management system according to claim 1, characterized in that: The refrigerant side (100) uses R290, R134a or R744 as the refrigerant.

5. The integrated thermal management system according to claim 1, characterized in that: The thermal management system includes a coolant side (200).

6. The integrated thermal management system according to claim 5, characterized in that: The cooling liquid side (200) uses water or antifreeze as the cooling liquid.

7. The integrated thermal management system according to claim 5, characterized in that: The thermal management system is used for thermal management of a vehicle, wherein the vehicle comprises a passenger compartment, a battery (302) and a motor (301), the coolant side (200) comprises a heating, ventilation and air conditioning component (201), the heating, ventilation and air conditioning component (201) comprises a heater (2011) and an evaporator (2022), and the coolant side (200) comprises the following cycle: It comprises a cycle A, wherein the coolant circulation route of the cycle A includes the motor (301), the water heater (102), the heater (2011) and the motor (301) in sequence; It includes a cycle B, wherein the coolant circulation route of the cycle B includes the battery (302), the water cooler assembly and the battery (302) in sequence; It includes a cycle C, wherein the coolant circulation route of the cycle C includes the battery (302), the water cooler assembly, the evaporator (2022) and the battery (302) in sequence; It includes a cycle D, wherein the coolant circulation route of the cycle D successively includes the evaporator (2022), the water cooler assembly and the evaporator (2022); It comprises a cycle E, wherein the coolant circulation route of the cycle E successively includes the heater (2011), the water heater (102) and the heater (2011); It comprises a cycle F, wherein the coolant circulation route of the cycle F successively includes the heater (2011), the battery (302), the water heater (102) and the heater (2011); It comprises a circulation G, wherein the cooling liquid circulation route of the circulation G successively includes the motor (301), the water cooler assembly and the motor (301).

8. The integrated thermal management system according to claim 7, characterized in that: The cooling liquid side (200) includes a water tank (204), a water pump, a valve and a cooling liquid pipeline (210).

9. The integrated thermal management system according to claim 8, characterized in that: The water pump includes a first water pump (202) and a second water pump (203); the valve includes a first three-way valve (205), a second three-way valve (206), a third three-way valve (207), a first four-way valve (208) and a second four-way valve (209); the HVAC component (201), the water tank (204), the water pump, the valve and the coolant pipeline (210) are configured as follows: The coolant circulation route of the cycle A includes the motor (301), the first three-way valve (205), the water tank (204), the first four-way valve (208), the water heater (102), the heater (2011), the second four-way valve (209) and the motor (301) in sequence; The coolant circulation route of the cycle B includes the battery (302), the first four-way valve (208), the second water pump (203), the water cooler assembly, the second three-way valve (206), the second four-way valve (209) and the battery (302) in sequence; The coolant circulation route of the cycle C includes the battery (302), the first four-way valve (208), the second water pump (203), the chiller assembly, the second three-way valve (206), the evaporator (2012), the second four-way valve (209), the third three-way valve (207) and the battery (302) in sequence; The coolant circulation route of the cycle D sequentially includes the evaporator (2012), the second four-way valve (209), the third three-way valve (207), the first four-way valve (208), the second water pump (203), the chiller assembly, the second three-way valve (206) and the evaporator (2012); The coolant circulation route of the loop E includes the heater (2011), the first water pump (202), the second four-way valve (209), the third three-way valve (207), the first four-way valve (208), the water heater (102) and the heater (2011) in sequence; The coolant circulation route of the cycle F includes the heater (2011), the first water pump (202), the second four-way valve (209), the third three-way valve (207), the battery (302), the first four-way valve (208), the water heater (102) and the heater (2011) in sequence; The circulation G includes a circulation G1, and the coolant circulation route of the circulation G1 includes the motor (301), the first three-way valve (205), the water tank (204), the first four-way valve (208), the second water pump (203), the water cooler assembly, the second three-way valve (206), the second four-way valve (209), and the motor (301) in sequence; The circulation G includes a circulation G2, and the coolant circulation route of the circulation G2 sequentially includes the first three-way valve (205), the first four-way valve (208), the second water pump (203), the water cooler assembly, the second three-way valve (206), the second four-way valve (209), and the motor (301).

10. A control method for an integrated thermal management system, for controlling an integrated thermal management system according to any one of claims 7 to 9, characterized in that: The integrated thermal management system includes a control system that receives instructions and performs thermal management control in the following mode: If the instruction is to cool the motor (301), then the cycle A is performed; If the instruction is to cool the battery (302) and the motor (301), then the cycle A and the cycle B are performed; If the instruction is to cool the passenger compartment, cool the battery (302) and the motor (301), then the cycle A and the cycle C are performed; If the instruction is to cool the passenger compartment and the battery (302), then the cycle A and the cycle C are performed; If the instruction is to cool the passenger compartment, the cycle A and the cycle D are performed; If the instruction is to cool and dehumidify the passenger compartment, the cycle A and the cycle D are performed, and the damper of the HVAC component (201) is adjusted; If the instruction is to heat the passenger compartment, the loop G and the loop E are performed; If the instruction is to heat the passenger compartment and heat the battery (302), then the loop G and the loop F are performed; If the instruction is to heat the passenger compartment, heat the battery (302) and cool the motor (301), or the instruction is to heat the passenger compartment, heat the battery (302) and recover waste heat from the motor (301), then the cycle G is performed.

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