Integrated heat management system with multiple three-way valves

Abstract

The utility model discloses an integrated thermal management system with a plurality of three-way valves in the technical field of hybrid electric vehicles. Comprising an indoor refrigeration circulation pipeline, a battery cooling circulation pipeline, a heat pump circulation pipeline, a battery and warm air circulation pipeline, a motor electric control circulation pipeline, a heat dissipation circulation pipeline, an engine circulation pipeline, an indoor condenser, an indoor warm air core body, a heat exchanger, a three-way valve and a four-way valve. Three-way valves are arranged on the motor electric control circulation pipeline and the heat dissipation circulation pipeline, a four-way valve is arranged between the battery and warm air circulation pipeline and the motor electric control circulation pipeline, a heat exchanger is arranged between the heat pump circulation pipeline and the motor electric control circulation pipeline, and a heat exchanger is arranged between the battery cooling circulation pipeline, the battery and the warm air circulation pipeline. According to the utility model, an engine, a battery, a motor, an air conditioner and a warm air system can be organically combined together for coupling utilization of heat. The system not only is simple in structure, but also is high in energy efficiency, and can be popularized and applied to hybrid vehicles.

Description

TECHNICAL FIELD

[0001] The utility model relates to a thermal management system for a hybrid vehicle, in particular to an integrated thermal management system with multiple three-way valves that can make full use of motor heat dissipation. BACKGROUND ART

[0002] With the rapid development of the global economy, green energy resources are becoming tense. Each country has formulated effective measures for the carbon neutrality goal, and vigorously developing new energy vehicles and hybrid vehicles has also become one of the important means to save energy and achieve carbon neutrality.

[0003] New energy vehicles and hybrid vehicles pay more and more attention to the vehicle thermal management technology. The current technological development of the new energy vehicle thermal management system has evolved from a simple distributed three-electric thermal management to an integrated three-electric thermal management, and various systems for coupling three-electric heat have been developed. Through effective integrated thermal management technology, energy consumption losses caused by temperature problems can be reduced. For example, the battery can improve its charge and discharge efficiency and reduce energy loss when operating at an appropriate temperature; the cooling of the motor and the electronic control unit can also reduce the performance degradation caused by overheating and improve the overall energy utilization efficiency. At the same time, the thermal management system of new energy vehicles is an important part of ensuring vehicle safety. By monitoring and controlling the temperatures of the battery, motor, and electronic control unit, safety accidents such as thermal runaway can be prevented. The thermal management system can also work in coordination with the vehicle air conditioning system, using the heat generated by the battery or the coolant to heat or cool the passenger compartment, improving the comfort of passengers. Through vehicle integrated heat management, the motor and battery can be in the optimal operating temperature range with the highest efficiency. Combining with heat pump air conditioning technology can further improve the vehicle's endurance.

[0004] However, at lower ambient temperatures, even when new energy vehicles and hybrid vehicles use heat pump technology to absorb heat from the environment, the air conditioning power consumption is still relatively high, further increasing the vehicle's endurance attenuation. When the ambient temperature is lower than a certain level, such as -10°C, some thermal management systems can only use electric heaters for heating, and the compressor is restricted from starting due to the low ambient temperature, and the endurance attenuation is even more serious at this time. At the same time, in existing integrated thermal management technologies, many use eight-way valves, ten-way valves, or even twelve-way valves to integrate the vehicle's thermal management circuit. However, the more valve ports there are in the multi-way valve, the more complex the system structure will be. On the other hand, since all thermal management pipelines are integrated / connected to the multi-way valve, the multi-way valve has become the "center" of the vehicle's thermal management system. Once the eight-way valve, ten-way valve, or twelve-way valve fails, not only is the difficulty of fault location and repair very high, but sometimes it may also lead to safety accidents. SUMMARY OF THE INVENTION

[0005] In view of the deficiencies of the prior art, the present utility model provides an integrated thermal management system with multiple three-way valves, which can not only make the heat pump system highly efficient by utilizing the heat dissipation of the motor, but also uses only simple three-way valves and four-way valves as control valves, with a simple structure and complete functions.

[0006] The present utility model is realized through the following technical solutions. The present utility model includes an indoor refrigeration circulation pipeline, a compressor, an outdoor condenser, an indoor evaporator, a gas-liquid separator, a battery cooling circulation pipeline, a heat pump circulation pipeline, a battery and a warm air circulation pipeline, a motor and electronic control circulation pipeline, a heat dissipation circulation pipeline, a four-way valve, a first heat exchanger, an indoor condenser, a second heat exchanger, a battery, a heater, an indoor warm air core, a motor, a controller, a radiator, a first expansion valve, a second expansion valve, a third expansion valve, a first three-way valve, a second three-way valve, a first circulation pump, a second circulation pump, a third three-way valve, an engine, a fourth three-way valve, an engine radiator, an engine water pump, an engine circulation pipeline, a first connecting pipe, and a second connecting pipe; The compressor, the first three-way valve, the outdoor condenser, the second expansion valve, the indoor evaporator, and the gas-liquid separator are sequentially connected in series in the indoor refrigeration circulation pipeline, and the third expansion valve and the first heat exchanger are sequentially connected in series in the battery cooling circulation pipeline, and the indoor condenser, the first expansion valve, and the second heat exchanger are sequentially connected in series in the heat pump circulation pipeline; Two ports of the first three-way valve are respectively connected to the indoor refrigeration circulation pipeline, and the third port of the first three-way valve is connected to the inlet of the heat pump circulation pipeline, and the outlet of the heat pump circulation pipeline is connected to the indoor refrigeration circulation pipeline between the indoor evaporator and the gas-liquid separator; The inlet of the battery cooling circulation pipeline is connected to the indoor refrigeration circulation pipeline between the outdoor condenser and the second expansion valve, and the outlet of the battery cooling circulation pipeline is connected to the indoor refrigeration circulation pipeline between the indoor evaporator and the gas-liquid separator; The first circulation pump, the four-way valve, the indoor warm air core, the first heat exchanger, the third three-way valve, the battery, and the heater are sequentially connected in series in the battery and warm air circulation pipeline, the second circulation pump, the second three-way valve, the second heat exchanger, the four-way valve, the motor, and the controller are sequentially connected in series in the motor and electronic control circulation pipeline, and the radiator is connected in series in the heat dissipation circulation pipeline; Two ports of the second three-way valve are respectively connected to the motor and electronic control circulation pipeline, and the third port of the second three-way valve is connected to the inlet of the heat dissipation circulation pipeline, and the outlet of the heat dissipation circulation pipeline is connected to the motor and electronic control circulation pipeline between the four-way valve and the second heat exchanger; Two ports of the four-way valve are connected to the battery and warm air circulation pipeline, and the other two ports of the four-way valve are connected to the motor and electronic control circulation pipeline. The engine, the fourth three-way valve, the engine radiator, and the engine water pump are sequentially connected in series in the engine circulation pipeline, two ports of the third three-way valve are respectively connected to the battery and warm air circulation pipeline, the third port of the third three-way valve is connected to one port of the first connecting pipe, the other port of the first connecting pipe is connected to the engine circulation pipeline between the engine radiator and the engine water pump, two ports of the fourth three-way valve are respectively connected to the engine circulation pipeline, the third port of the fourth three-way valve is connected to one port of the second connecting pipe, and the other port of the second connecting pipe is connected to the battery and warm air circulation pipeline between the third three-way valve and the battery.

[0007] Further, in the present utility model, the heater is a PTC heater, and both the first heat exchanger and the second heat exchanger are double-channel plate heat exchangers.

[0008] Furthermore, in the present utility model, the first three-way valve, the second three-way valve, the third three-way valve, and the fourth three-way valve are all two-position three-way valves.

[0009] Furthermore, in the present utility model, the first expansion valve is a thermostatic expansion valve or an electronic expansion valve, the second expansion valve is a thermostatic expansion valve or an electronic expansion valve, and the third expansion valve is an electronic expansion valve.

[0010] Furthermore, in the present utility model, when the third expansion valve is a thermostatic expansion valve, the integrated thermal management system further includes a solenoid valve, which is connected in series in the battery cooling circulation pipeline and is located upstream of the third expansion valve, and the solenoid valve controls the on-off of the circulating medium in the battery cooling circulation pipeline. Without this solenoid valve, when the third expansion valve is a thermostatic expansion valve and the compressor is in operation, the third expansion valve will also always be in the open state.

[0011] Furthermore, in the present utility model, the motor is a drive motor, and the controller is a motor controller.

[0012] Furthermore, the present utility model further includes a generator, which is connected in series in the motor electric control circulation pipeline and is located between the motor and the controller.

[0013] Furthermore, in the present utility model, the function of the first three-way valve is realized by a first two-way valve and a second two-way valve. The first two-way valve is connected in series in the indoor refrigeration circulation pipeline and is located between the compressor and the outdoor condenser. The second two-way valve is connected in series in the heat pump circulation pipeline and is located upstream of the indoor condenser. The inlet of the heat pump circulation pipeline is connected to the indoor refrigeration circulation pipeline between the compressor and the first two-way valve. The function of the second three-way valve is realized by a third two-way valve and a fourth two-way valve. The third two-way valve is connected in series in the motor electric control circulation pipeline and is located between the second circulation pump and the second heat exchanger. The fourth two-way valve is connected in series in the heat dissipation circulation pipeline and is located upstream of the radiator. The inlet of the heat dissipation circulation pipeline is connected to the motor electric control circulation pipeline between the second circulation pump and the third two-way valve.

[0014] Furthermore, in the present utility model, the function of the four-way valve is realized by multiple three-way valves or two-way valves, and the function of the four-way valve is realized through the cooperation of multiple three-way valves or two-way valves.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: The present utility model is reasonably designed and has a simple structure. It can not only make the heat pump system have a relatively high system efficiency when the ambient temperature is low, effectively avoiding frosting on the outdoor heat exchanger; moreover, only two three-way valves and one four-way valve are used for the relevant control valves in the whole system, without using more complex multi-way valves, which can reduce the probability of safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of Embodiment 1 of the present utility model;

[0017] Wherein, 1. Indoor refrigeration circulation pipeline, 2. Battery cooling circulation pipeline, 3. Heat pump circulation pipeline, 4. Battery and warm air circulation pipeline, 5. Motor and electronic control circulation pipeline, 6. Heat dissipation circulation pipeline, 7. Four-way valve, 8. Compressor, 9. Outdoor condenser, 10. Indoor evaporator, 11. Gas-liquid separator, 12. First heat exchanger, 13. Indoor condenser, 14. Second heat exchanger, 15. Battery, 16. Heater, 17. Indoor warm air core, 18. Motor, 19. Controller, 20. Radiator, 21. First expansion valve, 22. Second expansion valve, 23. Third expansion valve, 24. First three-way valve, 25. Second three-way valve, 26. First circulation pump, 27. Second circulation pump, 28. Third three-way valve, 29. Engine, 30. Fourth three-way valve, 31. Engine radiator, 32. Engine water pump, 33. Engine circulation pipeline, 34. First connecting pipe, 35. Second connecting pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to make the content described in the present utility model easier to understand, the technical solution of the present utility model will be further explained below in conjunction with specific embodiments. The above embodiments are only used to illustrate the present utility model, but the present utility model is not limited to this content. Embodiment

[0019] As Figure 1As shown in the figure, the utility model includes an indoor refrigeration cycle pipeline 1, a battery cooling cycle pipeline 2, a heat pump cycle pipeline 3, a battery and warm air cycle pipeline 4, a motor and electronic control cycle pipeline 5, a heat dissipation cycle pipeline 6, a four-way valve 7, a compressor 8, an outdoor condenser 9, an indoor evaporator 10, a gas-liquid separator 11, a first heat exchanger 12, an indoor condenser 13, a second heat exchanger 14, a battery 15, an indoor warm air core 17, a motor 18, a controller 19, a radiator 20, a first expansion valve 21, a second expansion valve 22, a third expansion valve 23, a first three-way valve 24, a second three-way valve 25, a first circulation pump 26, a second circulation pump 27, a third three-way valve 28, an engine 29, a fourth three-way valve 30, an engine radiator 31, an engine water pump 32, an engine cycle pipeline 33, a first connecting pipe 34, and a second connecting pipe 35. The compressor 8, the first three-way valve 24, the outdoor condenser 9, the second expansion valve 22, the indoor evaporator 10, and the gas-liquid separator 11 are sequentially connected in series in the indoor refrigeration cycle pipeline 1. The third expansion valve 23 and the first heat exchanger 12 are sequentially connected in series in the battery cooling cycle pipeline 2. The indoor condenser 13, the first expansion valve 21, and the second heat exchanger 14 are sequentially connected in series in the heat pump cycle pipeline 3. The A and B ports of the first three-way valve 24 are respectively connected to the indoor refrigeration cycle pipeline 1. The C port of the first three-way valve 24 is connected to the inlet of the heat pump cycle pipeline 3. The outlet of the heat pump cycle pipeline 3 is connected to the indoor refrigeration cycle pipeline 1 between the indoor evaporator 10 and the gas-liquid separator 11. The inlet of the battery cooling cycle pipeline 2 is connected to the indoor refrigeration cycle pipeline 1 between the outdoor condenser 9 and the second expansion valve 22. The outlet of the battery cooling cycle pipeline 2 is connected to the indoor refrigeration cycle pipeline 1 between the indoor evaporator 10 and the gas-liquid separator 11. The first circulation pump 26, the four-way valve 7, the indoor warm air core 17, the first heat exchanger 12, the third three-way valve 28, the battery 15, and the heater 16 are sequentially connected in series in the battery and warm air cycle pipeline 4. The second circulation pump 27, the second three-way valve 25, the second heat exchanger 14, the four-way valve 7, the motor 18, and the controller 19 are sequentially connected in series in the motor and electronic control cycle pipeline 5. The radiator 20 is connected in series in the heat dissipation cycle pipeline 6. The D and E ports of the second three-way valve 25 are respectively connected to the motor and electronic control cycle pipeline 5. The F port of the second three-way valve 25 is connected to the inlet of the heat dissipation cycle pipeline 6. The outlet of the heat dissipation cycle pipeline 6 is connected to the motor and electronic control cycle pipeline 5 between the four-way valve 7 and the second heat exchanger 14. The G and H ports of the four-way valve 7 are connected to the battery and warm air cycle pipeline 4. The J and K ports of the four-way valve 7 are connected to the motor and electronic control cycle pipeline 5.The engine 29, the fourth three-way valve 30, the engine radiator 31, and the engine water pump 32 are connected in series in the engine circulation pipeline 33 in sequence. The L and M ports of the third three-way valve 28 are respectively communicated with the battery and the warm air circulation pipeline 4, and the N port of the third three-way valve 28 is connected with one port of the first connecting pipe 34. The other port of the first connecting pipe 34 is communicated with the engine circulation pipeline 33 between the engine radiator 31 and the engine water pump 32. The P and S ports of the fourth three-way valve 30 are respectively communicated with the engine circulation pipeline 33, and the R port of the fourth three-way valve 30 is connected with one port of the second connecting pipe 35. The other port of the second connecting pipe 35 is communicated with the battery and the warm air circulation pipeline 4 between the third three-way valve 28 and the battery 15. The heater 16 is a PTC heater, the first heat exchanger 12 and the second heat exchanger 14 are both double-channel plate heat exchangers, the first three-way valve 24, the second three-way valve 25, the third three-way valve 28, and the fourth three-way valve 30 are all two-position three-way valves, and the first expansion valve 21, the second expansion valve 22, and the third expansion valve 23 are all electronic expansion valves.

[0020] During the implementation process of the present utility model, when the engine 29 is not running and the whole vehicle is driven by electricity, control the L and M ports of the third three-way valve 28 to be connected, and the L and N ports of the third three-way valve 28 to be cut off. Control the P and S ports of the fourth three-way valve 30 to be connected, and the P and R ports of the fourth three-way valve 30 to be cut off. The main operating conditions and the control methods of each component are as follows:

[0021] Control the A and B ports of the first three-way valve 24 to be connected, and the A and C ports of the first three-way valve 24 to be cut off. Open the second expansion valve 22, and close the first expansion valve 21 and the third expansion valve 23; the compressor 8 operates, and the first circulation pump 26 and the second circulation pump 27 stop rotating. The outdoor condenser 9 dissipates heat to the environment, and the indoor evaporator 10 absorbs heat in the cab.

[0022] Control the A and B ports of the first three-way valve 24 to be connected, and the A and C ports of the first three-way valve 24 to be cut off. Open the second expansion valve 22, and close the first expansion valve 21 and the third expansion valve 23; connect the D and F ports of the second three-way valve 25, and cut off the D and E ports of the second three-way valve 25. Connect the J and K ports of the four-way valve 7, and connect the G and H ports of the four-way valve 7; the compressor 8, the first circulation pump 26, and the second circulation pump 27 operate. The outdoor condenser 9 dissipates heat to the environment, and the indoor evaporator 10 absorbs heat in the cab; the motor 18 and the controller 19 dissipate heat to the environment through the radiator 20, and the coolant in the battery and the warm air circulation pipeline 4 circulates by itself.

[0023] Control the A and B ports of the first three-way valve 24 to be connected, the A and C ports of the first three-way valve 24 to be blocked, open the second expansion valve 22, and close the first expansion valve 21 and the third expansion valve 23; connect the D and F ports of the second three-way valve 25, block the D and E ports of the second three-way valve 25, connect the J and G ports of the four-way valve 7, and connect the K and H ports of the four-way valve 7; operate the compressor 8, the first circulation pump 26, and the second circulation pump 27. The outdoor condenser 9 dissipates heat to the environment, and the indoor evaporator 10 absorbs heat in the cab; the battery and warm air circulation pipeline 4, the motor and electronic control circulation pipeline 5, and the heat dissipation circulation pipeline 6 are connected together, and the battery 15, the motor 18, and the controller 19 dissipate heat to the environment through the radiator 20.

[0024] Control the A and B ports of the first three-way valve 24 to be connected, the A and C ports of the first three-way valve 24 to be blocked, open the second expansion valve 22 and the third expansion valve 23, and close the first expansion valve 21; connect the D and F ports of the second three-way valve 25, block the D and E ports of the second three-way valve 25, connect the J and K ports of the four-way valve 7, and connect the G and H ports of the four-way valve 7; operate the compressor 8, the first circulation pump 26, and the second circulation pump 27. The outdoor condenser 9 dissipates heat to the environment, and the indoor evaporator 10 absorbs heat in the cab; the battery 15 dissipates heat outward through the first heat exchanger 12, and the motor 18 and the controller 19 dissipate heat to the environment through the radiator 20.

[0025] Control the A and B ports of the first three-way valve 24 to be connected, the A and C ports of the first three-way valve 24 to be blocked, open the second expansion valve 22 and the third expansion valve 23, and close the first expansion valve 21; connect the D and F ports of the second three-way valve 25, block the D and E ports of the second three-way valve 25, connect the J and G ports of the four-way valve 7, and connect the K and H ports of the four-way valve 7; operate the compressor 8, the first circulation pump 26, and the second circulation pump 27. The outdoor condenser 9 dissipates heat to the environment, and the indoor evaporator 10 absorbs heat in the cab; the battery and warm air circulation pipeline 4, the motor and electronic control circulation pipeline 5, and the heat dissipation circulation pipeline 6 are connected together, and the battery 15, the motor 18, and the controller 19 dissipate heat to the environment through the first heat exchanger 12 and the radiator 20 simultaneously.

[0026] Control the D and F ports of the second three-way valve 25 to be connected, the D and E ports of the second three-way valve 25 to be blocked, connect the J and K ports of the four-way valve 7, and connect the G and H ports of the four-way valve 7; operate the first circulation pump 26 and the second circulation pump 27, and stop the compressor 8. The battery 15 dissipates heat to the cab through the indoor warm air core 16, and the motor 18 and the controller 19 dissipate heat to the environment through the radiator 20. At this time, the compressor does not work, and the heat required by the cab is realized through the heat dissipation of the battery 15.

[0027] The D and E ports of the second three-way valve 25 are connected, the D and F ports of the second three-way valve 25 are blocked, the J and G ports of the four-way valve 7 are connected, and the K and H ports of the four-way valve 7 are connected; the first circulation pump 26 and the second circulation pump 27 are running, and the compressor 8 is stopped. The battery and warm air circulation pipeline 4 and the motor and electronic control circulation pipeline 5 are connected together, and the battery 15, the motor 18, and the controller 19 dissipate heat to the cab through the in-cab warm air core 16.

[0028] The heat dissipation pipeline 6 is not connected to the battery and warm air circulation pipeline 4 and the motor and electronic control circulation pipeline 5, which can prevent the heat of the battery 15, the motor 18, and the controller 19 from being dissipated to the environment through the radiator 20.

[0029] Control the A and C ports of the first three-way valve 24 to be connected, the A and B ports of the first three-way valve 24 to be blocked, the first expansion valve 21 to be opened, and the second expansion valve 22 and the third expansion valve 23 to be closed; the D and E ports of the second three-way valve 25 are connected, the D and F ports of the second three-way valve 25 are blocked, the J and K ports of the four-way valve 7 are connected, and the G and H ports of the four-way valve 7 are connected; the compressor 8, the first circulation pump 26, and the second circulation pump 27 are running, and the heater 16 is working. The in-cab condenser 13 dissipates heat to the cab, the battery 15 is heated through the heater 16, and the motor 18 and the controller 19 dissipate heat outward through the second heat exchanger 14. The heat pump system absorbs the heat of the motor 18 and the controller 19 through the second heat exchanger 14, thereby improving the working efficiency of the compressor 8 in a low-temperature environment; at the same time, it does not directly absorb the heat of the environment through the radiator 20, which can effectively prevent the radiator 20 from frosting in a low-temperature environment.

[0030] Control the A and C ports of the first three-way valve 24 to be connected, the A and B ports of the first three-way valve 24 to be blocked, the first expansion valve 21 to be opened, and the second expansion valve 22 and the third expansion valve 23 to be closed; the D and E ports of the second three-way valve 25 are connected, the D and F ports of the second three-way valve 25 are blocked, the J and G ports of the four-way valve 7 are connected, and the K and H ports of the four-way valve 7 are connected; the compressor 8, the first circulation pump 26, and the second circulation pump 27 are running. The in-cab condenser 13 dissipates heat to the cab, the battery and warm air circulation pipeline 4 and the motor and electronic control circulation pipeline 5 are connected together, and the battery 15, the motor 18, and the controller 19 dissipate heat outward through the second heat exchanger 14. The heat pump system absorbs the heat of the battery 15, the motor 18, and the controller 19, thereby improving the working efficiency of the compressor 8 in a low-temperature environment.

[0031] Control the A and B ports of the first three-way valve 24 to be connected, and the A and C ports of the first three-way valve 24 to be cut off. Open the second expansion valve 22, and close the first expansion valve 21 and the third expansion valve 23; Connect the D and F ports of the second three-way valve 25, cut off the D and E ports of the second three-way valve 25, connect the J and K ports of the four-way valve 7, and connect the G and H ports of the four-way valve 7; Operate the compressor 8, the first circulation pump 26, and the second circulation pump 27. The indoor evaporator 10 and the indoor heater core 17 both work. The heat of the battery 15 is dissipated through the indoor heater core 17. The gas entering the cab is first cooled and dehumidified by the indoor evaporator 10, and then heated by the indoor heater core 17, so as to achieve the purpose of dehumidification. The motor 18 and the controller 19 dissipate heat through the radiator 20.

[0032] If the heat supply from the battery 15 to the indoor heater core 17 is insufficient, control the D and E ports of the second three-way valve 25 to be connected, cut off the D and F ports of the second three-way valve 25, connect the J and G ports of the four-way valve 7, and connect the K and H ports of the four-way valve 7, and supply heat to the indoor heater core 17 by absorbing the heat dissipated by the battery 15, the motor 18, and the controller 19; If it is still insufficient, turn on the heater 16.

[0033] During the implementation of the present utility model, when the engine 29 is running, if the battery 15 does not need to be heated and the indoor heater core 17 does not need heat supply either, control the L and M ports of the third three-way valve 28 to be connected, cut off the L and N ports of the third three-way valve 28, connect the P and S ports of the fourth three-way valve 30, cut off the P and R ports of the fourth three-way valve 30, and operate the engine water pump 32. The engine 29 dissipates heat through the engine radiator 31.

[0034] During the implementation of the present utility model, when the engine 29 is running, if the battery 15 needs to be heated and the indoor heater core 17 also needs heat supply, control the L and N ports of the third three-way valve 28 to be connected, cut off the L and M ports of the third three-way valve 28, connect the P and R ports of the fourth three-way valve 30, cut off the P and S ports of the fourth three-way valve 30, connect the G and H ports of the four-way valve 7, operate the engine water pump 32, and the heat of the engine 29 can be transferred to the battery 15 and the indoor heater core 17.

[0035] The above embodiments only illustratively explain the design principle and use function of the present utility model, rather than limiting the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. An integrated thermal management system with multiple three-way valves, comprising an indoor refrigeration cycle pipeline (1), a compressor (8), an outdoor condenser (9), an indoor evaporator (10), and a gas-liquid separator (11), characterized in that, It further includes a battery cooling circulation pipeline (2), a heat pump circulation pipeline (3), a battery and warm air circulation pipeline (4), a motor and electronic control circulation pipeline (5), a heat dissipation circulation pipeline (6), a four-way valve (7), a first heat exchanger (12), an indoor condenser (13), a second heat exchanger (14), a battery (15), a heater (16), an indoor warm air core (17), a motor (18), a controller (19), a radiator (20), a first expansion valve (21), a second expansion valve (22), a third expansion valve (23), a first three-way valve (24), a second three-way valve (25), a first circulation pump (26), a second circulation pump (27), a third three-way valve (28), an engine (29), a fourth three-way valve (30), an engine radiator (31), an engine water pump (32), an engine circulation pipeline (33), a first connecting pipe (34), and a second connecting pipe (35); The compressor (8), the first three-way valve (24), the outdoor condenser (9), the second expansion valve (22), the indoor evaporator (10), and the gas-liquid separator (11) are sequentially connected in series in the indoor refrigeration circulation pipeline (1). The third expansion valve (23) and the first heat exchanger (12) are sequentially connected in series in the battery cooling circulation pipeline (2). The indoor condenser (13), the first expansion valve (21), and the second heat exchanger (14) are sequentially connected in series in the heat pump circulation pipeline (3). Two ports of the first three-way valve (24) are respectively communicated with the indoor refrigeration circulation pipeline (1), and the third port of the first three-way valve (24) is communicated with the inlet of the heat pump circulation pipeline (3). The outlet of the heat pump circulation pipeline (3) is communicated with the indoor refrigeration circulation pipeline (1) between the indoor evaporator (10) and the gas-liquid separator (11). The inlet of the battery cooling circulation pipeline (2) is communicated with the indoor refrigeration circulation pipeline (1) between the outdoor condenser (9) and the second expansion valve (22), and the outlet of the battery cooling circulation pipeline (2) is communicated with the indoor refrigeration circulation pipeline (1) between the indoor evaporator (10) and the gas-liquid separator (11); The first circulation pump (26), four-way valve (7), indoor heater core (17), first heat exchanger (12), third three-way valve (28), battery (15), and heater (16) are connected in series in the battery and heater circulation pipeline (4) in sequence. The second circulation pump (27), second three-way valve (25), second heat exchanger (14), four-way valve (7), motor (18), and controller (19) are connected in series in the motor and electronic control circulation pipeline (5) in sequence. The radiator (20) is connected in series in the heat dissipation circulation pipeline (6). Two ports of the second three-way valve (25) are respectively connected and communicated with the motor and electronic control circulation pipeline (5), and the third port of the second three-way valve (25) is connected and communicated with the inlet of the heat dissipation circulation pipeline (6). The outlet of the heat dissipation circulation pipeline (6) is connected and communicated with the motor and electronic control circulation pipeline (5) between the four-way valve (7) and the second heat exchanger (14). Two ports of the four-way valve (7) are connected and communicated with the battery and heater circulation pipeline (4), and the other two ports of the four-way valve (7) are connected and communicated with the motor and electronic control circulation pipeline (5). The engine (29), fourth three-way valve (30), engine radiator (31), and engine water pump (32) are connected in series in the engine circulation pipeline (33) in sequence. Two ports of the third three-way valve (28) are respectively connected and communicated with the battery and heater circulation pipeline (4), and the third port of the third three-way valve (28) is connected to one port of the first connecting pipe (34). The other port of the first connecting pipe (34) is connected and communicated with the engine circulation pipeline (33) between the engine radiator (31) and the engine water pump (32). Two ports of the fourth three-way valve (30) are respectively connected and communicated with the engine circulation pipeline (33), and the third port of the fourth three-way valve (30) is connected to one port of the second connecting pipe (35). The other port of the second connecting pipe (35) is connected and communicated with the battery and heater circulation pipeline (4) between the third three-way valve (28) and the battery (15).

2. The integrated thermal management system with multiple three-way valves according to claim 1, characterized in that The heater (16) is a PTC heater, and both the first heat exchanger (12) and the second heat exchanger (14) are double-channel plate heat exchangers.

3. The integrated thermal management system with multiple three-way valves according to claim 1, characterized in that The first three-way valve (24), second three-way valve (25), third three-way valve (28), and fourth three-way valve (30) are all two-position three-way valves.

4. The integrated thermal management system with multiple three-way valves according to claim 1, characterized in that The first expansion valve (21) is a thermal expansion valve or an electronic expansion valve, the second expansion valve (22) is a thermal expansion valve or an electronic expansion valve, and the third expansion valve (23) is an electronic expansion valve.

5. The integrated thermal management system with multiple three-way valves according to claim 1, wherein The third expansion valve (23) is a thermal expansion valve, and the integrated thermal management system further includes a solenoid valve which is connected in series in the battery cooling circulation pipeline (2) and is located upstream of the third expansion valve (23).

6. The integrated thermal management system with multiple three-way valves according to claim 1, characterized in that The motor (18) is a drive motor, and the controller (19) is a motor controller.

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