Vehicle dual evaporator thermal management system and vehicle

Abstract

The application relates to a double-evaporator thermal management system for a vehicle and a vehicle, which comprises a double-suction-port double-rotor electric compressor, a four-way reversing valve, an outside-vehicle heat exchanger, a passenger cabin heat exchanger, a battery heat exchanger, a liquid accumulator, a first electronic expansion valve, a second electronic expansion valve, a first three-way valve, a second three-way valve, a third three-way valve, a first electromagnetic valve and a second electromagnetic valve. Through the reversing of the four-way reversing valve, the opening and closing of the electronic expansion valve, the on-off of the three-way valve and the electromagnetic valve, under the corresponding actions of the double-suction-port double-rotor electric compressor, the outside-vehicle heat exchanger, the passenger cabin heat exchanger, the battery heat exchanger, the liquid accumulator, the first electronic expansion valve and the second electronic expansion valve, the refrigeration or heating requirements of the passenger cabin and the power battery under different modes are met, and the problem that energy loss and system stability decline are caused when two branch refrigerants are mixed at the suction port of the compressor during the operation of the double-evaporator thermal management system for the electric vehicle of the existing single-suction-port compressor is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric vehicles, and particularly relates to a vehicle dual-evaporator thermal management system and a vehicle. BACKGROUND

[0002] The global new energy vehicle industry has entered a stage of rapid development. Electric vehicles are the main models of new energy vehicles today. Electric vehicles use power batteries as the source of system power, and in order to ensure that the power battery works safely within the optimal temperature range of 25 DEG C to 40 DEG C, it needs to be controlled for thermal management. In addition, in order to ensure the comfort of the driver and passengers, the temperature of the air in the passenger compartment also needs to be adjusted and controlled to keep it around 25 DEG C.

[0003] Liquid cooling technology is the mainstream technology currently used in electric vehicle thermal management systems, and a set of dual-evaporator refrigeration system is usually used to simultaneously meet the thermal management requirements for power batteries and passenger compartments. However, when the existing dual-evaporator thermal management system for electric vehicles with a single suction port compressor is running, although the evaporating pressures of the two evaporators can be made different by adjusting the electronic expansion valves in front of the evaporators, and thus the evaporating temperatures of the two evaporators can be made different, but when the two branch refrigerants are mixed at the suction port of the compressor, pressure loss or pressure fluctuation near the suction port of the compressor is inevitably caused, which brings energy loss and a decrease in system stability. SUMMARY

[0004] In view of the above problems of the prior art, the present application provides a dual-evaporator thermal management system for vehicles and a vehicle, which solves the problem that when the existing dual-evaporator thermal management system for electric vehicles with a single suction port compressor is running, the mixing of the two branch refrigerants at the suction port of the compressor brings energy loss and a decrease in system stability.

[0005] To achieve the above-mentioned purpose, the first aspect of the present application provides a dual-evaporator thermal management system for vehicles, comprising: a dual-suction-port dual-rotor electric compressor, a four-way reversing valve, an outside-vehicle heat exchanger, a passenger compartment heat exchanger, a battery heat exchanger, a liquid accumulator, a first electronic expansion valve, a second electronic expansion valve, a first three-way valve, a second three-way valve, a third three-way valve, a first electromagnetic valve, and a second electromagnetic valve.

[0006] The second electromagnetic valve is connected between the two suction ports of the double-suction double-rotor electric compressor, the first suction port, the first electromagnetic valve, the third three-way valve, the passenger cabin heat exchanger, the first electronic expansion valve, the first three-way valve, the liquid accumulator, the external heat exchanger, the four-way reversing valve and the exhaust port of the double-suction double-rotor electric compressor are sequentially connected; the first suction port, the first electromagnetic valve, the battery heat exchanger, the second electronic expansion valve, the second three-way valve, the first three-way valve, the liquid accumulator, the external heat exchanger, the four-way reversing valve and the exhaust port of the double-suction double-rotor electric compressor are sequentially connected; the four-way reversing valve is further connected with the second suction port and the third three-way valve respectively; the second three-way valve is further connected with the passenger cabin heat exchanger and the first electronic expansion valve respectively; and the first three-way valve is further connected with the external heat exchanger.

[0007] Through the reversing of the four-way reversing valve, the opening and closing of the electronic expansion valve, and the on-off of the three-way valve and the electromagnetic valve, under the corresponding action of the double-suction double-rotor electric compressor, the external heat exchanger, the passenger cabin heat exchanger, the battery heat exchanger, the liquid accumulator, the first electronic expansion valve and the second electronic expansion valve, the refrigeration or heating requirements of the passenger cabin and the power battery in different modes are met.

[0008] The application realizes the switching of the two types of operation modes of refrigeration and heating through the reversing of the four-way reversing valve; compared with the current electric vehicle double-evaporator thermal management system using a single-suction compressor, the application uses a double-suction double-rotor electric compressor, which can realize the stable operation of the passenger cabin heat exchanger and the battery heat exchanger at different evaporation temperatures respectively in the refrigeration mode, can be independently controlled and does not interfere with each other, can more flexibly and accurately control the temperature of the passenger cabin and the power battery, and can also improve the coefficient of performance of the system. In the heating mode, the application can realize the recycling of waste heat of the power battery for passenger cabin heating, and can realize the stable operation of the battery heat exchanger and the external heat exchanger at different evaporation temperatures. In the field of electric vehicles, the application has wide popularization and application value.

[0009] To achieve the above purpose, the second aspect of the application provides a vehicle, which comprises the double-evaporator thermal management system for vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is the overall structure diagram of the double-evaporator thermal management system for vehicle of the application;

[0011] Figure 2 is the principle diagram of the refrigeration mode ①: "passenger cabin + power battery refrigeration simultaneously" mode of the application;

[0012] Figure 3 is the principle diagram of the refrigeration mode ②: "passenger cabin single refrigeration" mode of the application;

[0013] Figure 4is a refrigeration mode ③: "power battery single refrigeration" mode principle diagram of the present application;

[0014] Figure 5 is a heating mode ①: "passenger compartment + power battery simultaneous heating" mode principle diagram of the present application;

[0015] Figure 6 is a heating mode ②: "passenger compartment single heating" mode principle diagram of the present application;

[0016] Figure 7 is a heating mode ③: "power battery single heating" mode principle diagram of the present application;

[0017] Figure 8 is a heating mode ④: "passenger compartment heating + power battery waste heat recovery" mode principle diagram of the present application;

[0018] Figure 9 is a structural schematic diagram of a computing device provided by an embodiment of the present application.

[0019] It should be understood that in the above structural schematic diagram, the size and shape of each block diagram are only for reference and should not constitute an exclusive interpretation of the embodiments of the present application. The relative position and inclusion relationship between the block diagrams presented by the structural schematic diagram are only used to represent the structural association between the block diagrams, and are not intended to limit the physical connection mode of the embodiments of the present application. DETAILED DESCRIPTION

[0020] The technical solutions provided by the present application will be further described below in conjunction with the drawings and embodiments. It should be understood that the system structure and business scenarios provided in the embodiments of the present application are mainly used to illustrate possible implementation modes of the technical solutions of the present application, and should not be interpreted as the only limitation of the technical solutions of the present application. Those skilled in the art can know that the technical solutions provided by the present application are also applicable to similar technical problems as the system structure evolves and new business scenarios appear.

[0021] It should be understood that the instruction sending scheme provided by the embodiments of the present application includes a vehicle dual-evaporator thermal management system and device. Since the principles of these technical solutions for solving problems are the same or similar, in the following specific embodiments, some repeated parts may not be described again, but should be regarded as mutual reference between these specific embodiments, which can be combined with each other.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. If there is any inconsistency, the meaning explained in the specification or derived from the content described in the specification shall prevail. In addition, the terms used herein are only for the purpose of describing the embodiments of the present application and are not intended to limit the present application.

[0023] The existing single-suction compressor double-evaporator thermal management system for electric vehicles can make the evaporation pressures of the two evaporators different by adjusting the electronic expansion valves in front of the respective evaporators, and thus make the evaporation temperatures of the two evaporators different, but when the two branch refrigerants are mixed at the suction port of the compressor, pressure loss or pressure fluctuation near the compressor suction port is inevitable, which brings energy loss and decline in system stability. Based on this, the application proposes a double-evaporator thermal management system for vehicles, which uses a double-suction double-rotor electric compressor, and can realize stable operation of the passenger cabin heat exchanger and the battery heat exchanger at different evaporation temperatures in refrigeration mode, and the evaporation temperatures can be independently controlled and do not interfere with each other, which can more flexibly and accurately control the temperature of the passenger cabin and the power battery, and can also improve the coefficient of performance of the system. In the heating mode, the system can realize the recovery of waste heat of the power battery for passenger cabin heating, and can realize stable operation of the battery heat exchanger and the external heat exchanger at different evaporation temperatures.

[0024] The embodiments of the application can be applied in the field of new energy electric vehicles, such as new energy electric vehicles, new energy electric ships, new energy electric aircrafts, etc.

[0025] To solve the above technical problems, the application designs a double-evaporator thermal management system for vehicles, the overall structure diagram of the system is as shown in Figure 1 The double-evaporator thermal management system for vehicles is specifically introduced below. Figure 1 As shown in Figure 1 , the system comprises a double-suction double-rotor electric compressor 5, a four-way reversing valve 6, an external heat exchanger 7, a passenger cabin heat exchanger 8, a battery heat exchanger 9, a liquid accumulator 10, a first electronic expansion valve 11, a second electronic expansion valve 12, a first three-way valve 13, a second three-way valve 14, a third three-way valve 15, a first electromagnetic valve 16 and a second electromagnetic valve 17;

[0026] Among them, the second electromagnetic valve is connected between the two suction ports of the double-suction double-rotor electric compressor, the first suction port, the first electromagnetic valve, the third three-way valve, the passenger cabin heat exchanger, the first electronic expansion valve, the first three-way valve, the liquid accumulator, the external heat exchanger, the four-way reversing valve and the exhaust port of the double-suction double-rotor electric compressor are connected in sequence; the first suction port, the first electromagnetic valve, the battery heat exchanger, the second electronic expansion valve, the second three-way valve, the first three-way valve, the liquid accumulator, the external heat exchanger, the four-way reversing valve and the exhaust port of the double-suction double-rotor electric compressor are connected in sequence; the four-way reversing valve is further connected with the second suction port and the third three-way valve respectively; the second three-way valve is further connected with the passenger cabin heat exchanger and the first electronic expansion valve respectively; the first three-way valve is further connected with the external heat exchanger;

[0027] Through the switching of the four-way switching valve, the opening and closing of the electronic expansion valve, the switching of the three-way valve and the electromagnetic valve, under the corresponding action of the double-suction double-rotor electric compressor, the vehicle exterior heat exchanger, the passenger cabin heat exchanger, the battery heat exchanger, the liquid accumulator, the first electronic expansion valve and the second electronic expansion valve, the refrigeration or heating requirements of the passenger cabin and the power battery in different modes are met.

[0028] In an embodiment, as shown in Figure 1 The first path 1 of the four-way switching valve 6 is connected with the exhaust port of the double-suction double-rotor electric compressor 5, the second path 2 of the four-way switching valve 6 is connected with the third path c of the third three-way valve 15, the third path 3 of the four-way switching valve 6 is connected with the second suction port of the double-suction double-rotor electric compressor 5, and the fourth path 4 of the four-way switching valve 6 is connected with one end of the vehicle exterior heat exchanger 7.

[0029] The second electromagnetic valve 17 is connected between the two suction ports of the double-suction double-rotor electric compressor 5, and the exhaust port of the double-suction double-rotor electric compressor 5 is connected with the first path 1 of the four-way switching valve 6.

[0030] The first path a of the third three-way valve 15 is connected with one end of the first electromagnetic valve 16, the second path b of the third three-way valve 15 is connected with one end of the passenger cabin heat exchanger 8, and the third path c of the third three-way valve 15 is connected with the second path 2 of the four-way switching valve 6.

[0031] One end of the first electromagnetic valve 16 is connected with the first path a of the third three-way valve 15 and the other end of the battery heat exchanger 9, respectively, and the other end of the first electromagnetic valve 16 is connected with the first suction port of the double-suction double-rotor electric compressor 5.

[0032] One end of the passenger cabin heat exchanger 8 is connected with the second path b of the third three-way valve 15, and the other end of the passenger cabin heat exchanger 8 is connected with one end of the first electronic expansion valve 11 and the third path c of the second three-way valve 14, respectively.

[0033] One end of the first electronic expansion valve 11 is connected with the other end of the passenger cabin heat exchanger 8 and the third path c of the second three-way valve 14, respectively, and the other end of the first electronic expansion valve 11 is connected with the second path b of the second three-way valve 14 and the first path a of the first three-way valve 13, respectively.

[0034] The first path a of the second three-way valve 14 is connected with one end of the second electronic expansion valve 12, the second path b of the second three-way valve 14 is connected with the other end of the first electronic expansion valve 11 and the first path a of the first three-way valve 13, respectively, and the third path c of the second three-way valve 14 is connected with the other end of the passenger cabin heat exchanger 8 and one end of the first electronic expansion valve 11, respectively.

[0035] One end of the second electronic expansion valve 12 is connected with the first path a of the second three-way valve 14, and the other end of the second electronic expansion valve 12 is connected with one end of the battery heat exchanger 9.

[0036] One end of the battery heat exchanger 9 is connected with the other end of the second electronic expansion valve 12, and the other end of the battery heat exchanger 9 is connected with one end of the first electromagnetic valve 16 and the first path a of the third three-way valve 15 respectively;

[0037] The first path a of the first three-way valve 13 is connected with the other end of the first electronic expansion valve 11 and the second path b of the second three-way valve 14 respectively, the second path b of the first three-way valve 13 is connected with one end of the accumulator 10, the third path c of the first three-way valve 13 is connected with the other end of the accumulator 10 and the other end of the external heat exchanger 7;

[0038] One end of the accumulator 10 is connected with the second path b of the first three-way valve 13, and the other end of the accumulator 10 is connected with the third path c of the first three-way valve 13 and the other end of the external heat exchanger 7 respectively;

[0039] One end of the external heat exchanger 7 is connected with the fourth path 4 of the four-way reversing valve 6, and the other end of the external heat exchanger 7 is connected with the third path c of the first three-way valve 13 and the other end of the accumulator 10 respectively.

[0040] In an embodiment, the dual-evaporator thermal management system for vehicle can be applied to an electric vehicle.

[0041] In an embodiment, the dual-evaporator thermal management system for vehicle can realize refrigeration or heating of the passenger cabin and the power battery in different modes under the control of the controller, and the controller controls according to the temperature of the passenger cabin and the temperature of the power battery. Therefore, the dual-evaporator thermal management system for vehicle can further comprise a first temperature sensor, a second temperature sensor and a controller.

[0042] The first temperature sensor is configured to collect the temperature of the passenger cabin.

[0043] The second temperature sensor is configured to collect the temperature of the power battery.

[0044] The controller is configured to control the refrigeration mode or the heating mode of the passenger cabin according to the temperature of the passenger cabin, and / or control the refrigeration mode or the heating mode of the power battery according to the temperature of the power battery.

[0045] Specifically, the first temperature sensor can be arranged in the passenger cabin or on the passenger cabin heat exchanger 8. The second temperature sensor can be arranged on the outer surface of the single battery and / or on a certain part of the power battery module.

[0046] The controller controls the cooling or heating mode of the passenger cabin and the power battery according to the temperature of the passenger cabin and the temperature of the power battery, and then controls the switching of the four-way reversing valve, the opening and closing of the electronic expansion valve, the on-off of the three-way valve and the electromagnetic valve in the dual-evaporator thermal management system for the vehicle, controls the dual-suction-port dual-rotor electric compressor, the outside heat exchanger, the passenger cabin heat exchanger, the battery heat exchanger, the liquid accumulator, the first electronic expansion valve and the second electronic expansion valve to realize the corresponding functions, and then meets the cooling or heating requirements of the passenger cabin and the power battery in different modes.

[0047] For example, when the actual temperature of the passenger cabin exceeds the preset temperature range, such as exceeding the set maximum value, the passenger cabin needs to be cooled according to the actual temperature of the passenger cabin to reduce the temperature of the passenger cabin; or when the actual temperature of the passenger cabin is lower than the set minimum value, the passenger cabin needs to be heated according to the actual temperature of the passenger cabin to increase the temperature of the passenger cabin.

[0048] When the actual temperature of the power battery exceeds the normal temperature range, such as exceeding the maximum value of the normal temperature range, the power battery needs to be cooled according to the actual temperature of the power battery to reduce the temperature of the power battery to the normal temperature range; or when the actual temperature of the power battery is lower than the minimum value of the normal temperature range, the power battery needs to be heated according to the actual temperature of the power battery to increase the temperature of the power battery to the normal temperature range.

[0049] In some embodiments, the dual-evaporator thermal management system for the vehicle can also provide a display device on which the heating mode and / or the cooling mode options are displayed, and a person can select the heating or cooling of the passenger cabin or the power battery, and then the selected instructions are transmitted to the controller to control the switching of the four-way reversing valve, the opening and closing of the electronic expansion valve, the on-off of the three-way valve and the electromagnetic valve in the dual-evaporator thermal management system for the vehicle, and control the dual-suction-port dual-rotor electric compressor, the outside heat exchanger, the passenger cabin heat exchanger, the battery heat exchanger, the liquid accumulator, the first electronic expansion valve and the second electronic expansion valve to realize the corresponding functions, and then meet the cooling or heating requirements of the passenger cabin and the power battery in different modes.

[0050] For example, when a person feels that the temperature in the passenger cabin is too high or too low, the heating or cooling can be performed by selecting the heating mode and / or the cooling mode options of the passenger cabin.

[0051] In an embodiment, the thermal management system can realize a total of 7 operating modes of the two types of cooling and heating to cope with different driving conditions.

[0052] 1. Cooling mode of the thermal management system

[0053] In this operating mode, the first channel 1 and the fourth channel 4 of the four-way reversing valve are connected, and the second channel 2 and the third channel 3 are connected. Three cooling modes can be switched by controlling the opening and closing of the two electronic expansion valves in this thermal management system: ① "Simultaneous cooling of the passenger compartment and power battery" mode is achieved when both electronic expansion valves are open; ② "Passenger compartment cooling only" mode is achieved when the first electronic expansion valve is open and the second electronic expansion valve is closed; ③ "Power battery cooling only" mode is achieved when the first electronic expansion valve is closed and the second electronic expansion valve is open.

[0054] ① The schematic diagram of the "simultaneous cooling of the passenger compartment and the power battery" mode is as follows: Figure 2 As shown, at this time, the first channel 1 and the fourth channel 4 of the four-way directional valve are connected, and the second channel 2 and the third channel 3 are connected; both the first electronic expansion valve and the second electronic expansion valve are open; the first channel a and the second channel b of the first three-way valve are open, and the third channel c is closed; the first channel a and the second channel b of the second three-way valve are open, and the third channel c is closed; the second channel b and the third channel c of the third three-way valve are open, and the first channel a is closed; the first solenoid valve is on, and the second solenoid valve is closed.

[0055] After the refrigerant flows out of the exhaust port of the dual-intake dual-rotor electric compressor, it flows sequentially through the four-way reversing valve, the external heat exchanger, the liquid receiver, and the first three-way valve. Then it splits into two paths: the passenger compartment sub-circuit and the power battery sub-circuit. In the passenger compartment sub-circuit, the refrigerant flows sequentially through the first electronic expansion valve, the passenger compartment heat exchanger, the third three-way valve, and the four-way reversing valve, and flows into the second intake port of the dual-intake dual-rotor electric compressor. In the power battery sub-circuit, the refrigerant flows sequentially through the second three-way valve, the second electronic expansion valve, the battery heat exchanger, and the first solenoid valve, and flows into the first intake port of the dual-intake dual-rotor electric compressor.

[0056] In this mode: the external heat exchanger acts as a condenser, where the high-temperature, high-pressure refrigerant gas flowing from the exhaust port of the dual-intake, dual-rotor electric compressor condenses and releases heat, becoming a low-temperature, high-pressure refrigerant liquid. The receiver serves two purposes: first, it prevents excessive accumulation of liquid refrigerant in the external heat exchanger, which would reduce the heat transfer area and affect the heat transfer efficiency; second, it adapts to changes in evaporator load demand. When the cooling load increases, the refrigerant supply also increases, replenished by the liquid stored in the receiver; when the cooling load decreases, the required liquid supply also decreases, and excess liquid is stored in the receiver. The passenger compartment sub-circuit and the power battery sub-circuit are parallel flow path structures. The first and second electronic expansion valves function as throttling valves to reduce pressure and regulate flow. After throttling and pressure reduction, the refrigerant becomes a low-temperature, low-pressure wet vapor state. Both the passenger compartment heat exchanger and the battery heat exchanger function as evaporators. Within these exchangers, the refrigerant absorbs heat from the passenger compartment air and the power battery, evaporating and thus cooling the passenger compartment and the power battery. The degree of throttling and pressure reduction is controlled by adjusting the opening of the first and second electronic expansion valves, thereby controlling the evaporation temperature of the refrigerant in each exchanger. The refrigerant exiting the passenger compartment and battery heat exchangers is in a superheated state and flows into the two suction ports of the dual-suction, dual-rotor electric compressor for separate compression. At this time, the second solenoid valve is closed to prevent cross-contamination of the two refrigerant streams.

[0057] ② The schematic diagram of the "crew cabin cooling" mode is as follows: Figure 3 As shown, at this time, the first channel 1 and the fourth channel 4 of the four-way directional valve are connected, and the second channel 2 and the third channel 3 are connected; the first electronic expansion valve is open, and the second electronic expansion valve is closed; the first channel a and the second channel b of the first three-way valve are connected, and the third channel c is closed; the first channel a and the second channel b of the second three-way valve are connected, and the third channel c is closed; the second channel b and the third channel c of the third three-way valve are connected, and the first channel a is closed; the first solenoid valve is closed, and the second solenoid valve is connected.

[0058] After the refrigerant flows out of the exhaust port of the dual-inlet dual-rotor electric compressor, it flows sequentially through the four-way reversing valve, the external heat exchanger, the liquid receiver, the first three-way valve, the first electronic expansion valve, the passenger compartment heat exchanger, the third three-way valve, and the four-way reversing valve, and then splits into two streams that flow into the two intake ports of the electric compressor.

[0059] In this mode: the external heat exchanger acts as a condenser, where the high-temperature, high-pressure refrigerant gas flowing from the exhaust port of the dual-intake, dual-rotor electric compressor condenses and releases heat, becoming a low-temperature, high-pressure refrigerant liquid. The receiver functions the same as in mode ①, "Simultaneous cooling of the passenger compartment and power battery." Unlike mode ①, in this mode, the refrigerant only flows through the passenger compartment sub-circuit. The first electronic expansion valve throttles and reduces pressure and regulates flow; the refrigerant after throttling and reducing pressure becomes a low-temperature, low-pressure wet vapor. The passenger compartment heat exchanger acts as an evaporator; within it, the refrigerant absorbs heat from the air in the passenger compartment and evaporates, thus cooling the passenger compartment. The degree of throttling and pressure reduction is controlled by adjusting the opening of the first electronic expansion valve, thereby controlling the evaporation temperature of the refrigerant in the passenger compartment heat exchanger. The refrigerant flowing out of the passenger compartment heat exchanger is in a superheated state and finally splits into two streams, flowing into the two intake ports of the electric compressor for separate compression. At this time, the second solenoid valve is in the on state, which acts as a bypass to make the pressure of the two refrigerant streams flowing into the two suction ports of the electric compressor equal.

[0060] ③ The schematic diagram of the "Power Battery Single Cooling" mode is as follows: Figure 4 As shown, at this time, the first channel 1 and the fourth channel 4 of the four-way directional valve are connected, and the second channel 2 and the third channel 3 are connected; the first electronic expansion valve is closed, and the second electronic expansion valve is open; the first channel a and the second channel b of the first three-way valve are open, and the third channel c is closed; the first channel a and the second channel b of the second three-way valve are open, and the third channel c is closed; the second channel b and the third channel c of the third three-way valve are open, and the first channel a is closed; both the first solenoid valve and the second solenoid valve are connected.

[0061] After the refrigerant flows out of the exhaust port of the dual-inlet dual-rotor electric compressor, it flows sequentially through the four-way reversing valve, the external heat exchanger, the liquid receiver, the first three-way valve, the second three-way valve, the second electronic expansion valve, the battery heat exchanger, and the first solenoid valve, and then splits into two streams that flow into the two intake ports of the electric compressor.

[0062] In this mode: the external heat exchanger acts as a condenser, where the high-temperature, high-pressure refrigerant gas flowing from the exhaust port of the dual-intake, dual-rotor electric compressor condenses and releases heat, becoming a low-temperature, high-pressure refrigerant liquid. The receiver functions the same as in mode ①, "simultaneous cooling of the passenger compartment and power battery." Unlike mode ①, in this mode, the refrigerant only flows through the power battery sub-circuit. The second electronic expansion valve throttles and reduces pressure and regulates flow; the refrigerant after throttling and pressure reduction becomes a low-temperature, low-pressure wet vapor. The battery heat exchanger acts as an evaporator; within it, the refrigerant absorbs heat from the power battery and evaporates, thus cooling the power battery. The degree of throttling and pressure reduction is controlled by adjusting the opening of the second electronic expansion valve, thereby controlling the evaporation temperature of the refrigerant in the battery heat exchanger. The refrigerant flowing out of the battery heat exchanger is in a superheated state and finally splits into two streams, flowing into the two intake ports of the electric compressor for separate compression. At this time, the second solenoid valve is in the on state, which acts as a bypass to make the pressure of the two refrigerant streams flowing into the two suction ports of the electric compressor equal.

[0063] 2. Heating modes of the thermal management system

[0064] In this operating mode, the first channel (1) and the second channel (2) of the four-way reversing valve are connected, as are the third channel (3) and the fourth channel (4). The four heating modes can be switched by controlling the on / off states of the three three-way valves and two solenoid valves in this thermal management system, as detailed below.

[0065] ① The schematic diagram of the "simultaneous heating of the passenger compartment and the power battery" mode is as follows: Figure 5 As shown, at this time, the first path 1 and the second path 2 of the four-way directional valve are connected, and the third path 3 and the fourth path 4 are connected; both the first electronic expansion valve and the second electronic expansion valve are open; the first path a and the third path c of the first three-way valve are open, and the second path b is closed; the first path a and the second path b of the second three-way valve are open, and the third path c is closed; all three flow paths of the third three-way valve are open; the first solenoid valve is closed, and the second solenoid valve is open.

[0066] After the refrigerant flows out of the exhaust port of the dual-intake dual-rotor electric compressor, it flows through the four-way reversing valve and then through the third three-way valve, where it is divided into two paths: the passenger compartment sub-circuit and the power battery sub-circuit. The refrigerant in the passenger compartment sub-circuit flows through the passenger compartment heat exchanger and the first electronic expansion valve in sequence; the refrigerant in the power battery sub-circuit flows through the battery heat exchanger, the second electronic expansion valve, and the second three-way valve in sequence. After the two refrigerant paths merge, they flow through the first three-way valve, the external heat exchanger, and the four-way reversing valve, and then split into two paths that flow into the two intake ports of the dual-intake dual-rotor electric compressor respectively.

[0067] In this mode: the passenger cabin heat exchanger and the battery heat exchanger are both used as condensers, and the high-temperature and high-pressure refrigerant gas flowing out of the exhaust port of the double-suction double-rotor electric compressor is condensed and released heat in the two condensers respectively, thereby providing heat for the passenger cabin and the power battery respectively, and the condensed and released heat refrigerant becomes low-temperature and high-pressure liquid. The passenger cabin sub-circuit and the power battery sub-circuit are parallel flow path structures. The first electronic expansion valve and the second electronic expansion valve function as throttling and pressure reducing and flow adjusting. The two throttled and pressure-reduced refrigerants become low-temperature and low-pressure wet steam, and after being combined, flow to the outdoor heat exchanger. The outdoor heat exchanger is used as an evaporator, and the refrigerant in the evaporator absorbs the heat of the air in the external environment to evaporate and become superheated, and finally is divided into two streams respectively flowing into the two suction ports of the electric compressor for compression. At this time, the second electromagnetic valve is in the on state, and functions as a bypass to make the pressure of the two streams before flowing into the two suction ports of the electric compressor equal.

[0068] ②The principle diagram of the "passenger cabin single heating" mode is as shown in Figure 6 At this time, the first path 1 and the second path 2 of the four-way reversing valve are connected, the third path 3 and the fourth path 4 are connected, the first electronic expansion valve is opened, the second electronic expansion valve is closed, the first path a and the third path c of the first three-way valve are connected, the second path b is closed, the first path a and the second path b of the second three-way valve are connected, the third path c is closed, the second path b and the third path c of the third three-way valve are connected, the first path a is closed, the first electromagnetic valve is closed, and the second electromagnetic valve is connected.

[0069] The refrigerant flowing out of the exhaust port of the double-suction double-rotor electric compressor flows through the four-way reversing valve, the third three-way valve, the passenger cabin heat exchanger, the first electronic expansion valve, the first three-way valve, the outdoor heat exchanger, and the four-way reversing valve, and is divided into two streams respectively flowing into the two suction ports of the double-suction double-rotor electric compressor.

[0070] In this mode: unlike the "passenger cabin + power battery simultaneous heating" mode, the refrigerant only flows through the passenger cabin sub-circuit. The passenger cabin heat exchanger is used as a condenser, and the high-temperature and high-pressure refrigerant gas flowing out of the exhaust port of the double-suction double-rotor electric compressor is condensed and released heat in the condenser, thereby providing heat for the passenger cabin, and the condensed and released heat refrigerant becomes low-temperature and high-pressure liquid. The first electronic expansion valve functions as throttling and flow adjusting, and the throttled refrigerant becomes low-temperature and low-pressure wet steam. The outdoor heat exchanger is used as an evaporator, and the refrigerant in the evaporator absorbs the heat of the air in the external environment to evaporate and become superheated, and finally is divided into two streams respectively flowing into the two suction ports of the electric compressor for compression. At this time, the second electromagnetic valve is in the on state, and functions as a bypass to make the pressure of the two streams before flowing into the two suction ports of the electric compressor equal.

[0071] ③The principle diagram of the "power battery single heating" mode is as shown in Figure 7As shown, at this time, the first path 1 and the second path 2 of the four-way reversing valve are connected, the third path 3 and the fourth path 4 are connected; the first electronic expansion valve is closed, and the second electronic expansion valve is opened; the first path a and the third path c of the first three-way valve are connected, and the second path b is closed; the first path a and the second path b of the second three-way valve are connected, and the third path c is closed; the first path a and the third path c of the third three-way valve are connected, and the second path b is closed; the first electromagnetic valve is closed, and the second electromagnetic valve is connected;

[0072] After the refrigerant flows out of the exhaust port of the double-suction double-rotor electric compressor, it flows through the four-way reversing valve, the third three-way valve, the battery heat exchanger, the second electronic expansion valve, the second three-way valve, the first three-way valve, the external heat exchanger, and the four-way reversing valve, and is divided into two streams which respectively flow into the two suction ports of the double-suction double-rotor electric compressor.

[0073] In this mode: unlike the "passenger compartment + power battery simultaneous heating" mode, the refrigerant only flows through the power battery sub-circuit. The battery heat exchanger acts as a condenser, and the high-temperature and high-pressure refrigerant gas flowing out of the exhaust port of the double-suction double-rotor electric compressor is condensed and heat-released therein, thereby providing heat for the power battery. The refrigerant after condensation and heat release becomes a low-temperature and high-pressure liquid. The second electronic expansion valve functions as a throttling pressure-reducing and flow-regulating device, and the refrigerant after throttling pressure-reducing becomes a low-temperature and low-pressure wet vapor state. The external heat exchanger acts as an evaporator, and the refrigerant therein absorbs heat from the outside air and evaporates to become a superheated state, and finally is divided into two streams which respectively flow into the two suction ports of the electric compressor for compression. At this time, the second electromagnetic valve is in the connected state and functions as a bypass, so that the pressures of the two streams of refrigerant before flowing into the two suction ports of the electric compressor are equalized.

[0074] The principle diagram of the "passenger compartment heating + power battery waste heat recovery" mode is as shown in Figure 8 At this time, the first path 1 and the second path 2 of the four-way reversing valve are connected, the third path 3 and the fourth path 4 are connected; the first electronic expansion valve and the second electronic expansion valve are both opened; the first path a and the third path c of the first three-way valve are connected, and the second path b is closed; the first path a and the third path c of the second three-way valve are connected, and the second path b is closed; the second path b and the third path c of the third three-way valve are connected, and the first path a is closed; the first electromagnetic valve is connected, and the second electromagnetic valve is closed;

[0075] After the refrigerant flows out of the exhaust port of the double-suction double-rotor electric compressor, it flows through the four-way reversing valve, the third three-way valve, and the passenger cabin heat exchanger in sequence, and is divided into two paths: the power battery waste heat recovery sub-circuit and the vehicle external heat exchanger heat absorption sub-circuit. The refrigerant in the power battery waste heat recovery sub-circuit flows through the second three-way valve, the second electronic expansion valve, the battery heat exchanger, and the first electromagnetic valve in sequence, and then flows into the first suction port of the double-suction double-rotor electric compressor. The refrigerant in the vehicle external heat exchanger heat absorption sub-circuit flows through the first electronic expansion valve, the first three-way valve, the vehicle external heat exchanger, and the four-way reversing valve in sequence, and then flows into the second suction port of the double-suction double-rotor electric compressor.

[0076] After the waste heat of the power battery is recovered, the refrigeration of the power battery is realized.

[0077] In this mode, the passenger cabin heat exchanger acts as a condenser, in which the high-temperature and high-pressure refrigerant gas flowing out of the exhaust port of the double-suction double-rotor electric compressor is condensed and releases heat, thereby providing heat for the passenger cabin. The refrigerant after condensation and heat release becomes a low-temperature and high-pressure liquid. The power battery waste heat recovery sub-circuit and the vehicle external heat exchanger heat absorption sub-circuit are parallel flow path structures. The first electronic expansion valve and the second electronic expansion valve function to throttle and depressurize and to regulate the flow rate. After throttling and depressurizing, the refrigerant becomes a low-temperature and low-pressure wet vapor state. The battery heat exchanger and the vehicle external heat exchanger both act as evaporators. In the battery heat exchanger, the refrigerant absorbs the waste heat of the power battery and evaporates, which not only effectively utilizes the waste heat of the power battery, but also rapidly reduces the temperature of the power battery to the optimal temperature range. In the vehicle external heat exchanger, the refrigerant absorbs the heat of the air in the external environment and evaporates. By controlling the opening degree of the first electronic expansion valve and the second electronic expansion valve, the degree of throttling and depressurizing is controlled, and the evaporation temperature of the refrigerant in the battery heat exchanger and the vehicle external heat exchanger is controlled. The refrigerant flowing out of the battery heat exchanger and the vehicle external heat exchanger is in a superheated state, and finally flows into the two suction ports of the double-suction double-rotor electric compressor for compression, respectively. At this time, the second electromagnetic valve is in a closed state to prevent the two refrigerant streams from flowing.

[0078] In an embodiment, the second three-way valve in Figure 1 is removed, and the third path c of the second three-way valve and the pipelines respectively connected between the passenger cabin heat exchanger 8 and the first electronic expansion valve 11 are also removed, so that any mode other than the mode of “passenger cabin heating + power battery waste heat recovery” can be realized.

[0079] The structural feature of the vehicle dual-evaporator thermal management system provided in the application is that the compressor used in the system is a double-suction double-rotor electric compressor, which can enable the system to stably operate at two different evaporation temperatures in the refrigeration mode, i.e., the power battery sub-circuit and the passenger cabin sub-circuit are stably operated at different evaporation temperatures. The evaporation temperature of the passenger cabin sub-circuit and the evaporation temperature of the power battery sub-circuit can be independently controlled and do not interfere with each other, which can not only more flexibly and accurately control the temperature of the passenger cabin and the power battery, but also improve the coefficient of performance of the system. The compressor can realize the recovery of waste heat of the power battery for passenger cabin heating when the passenger cabin is in the heating mode, and can realize the stable operation of the battery heat exchanger and the external heat exchanger at different evaporation temperatures.

[0080] To achieve the above object, the application provides a vehicle, comprising the vehicle dual-evaporator thermal management system.

[0081] In an embodiment, the vehicle is an electric vehicle (may also include a plug-in hybrid electric vehicle).

[0082] In the field of electric vehicles, the vehicle dual-evaporator thermal management system has wide application value.

[0083] From the perspective of the controller, the application can also provide a vehicle dual-evaporator thermal management control method, which can include:

[0084] Receiving the temperature of the passenger cabin and / or the temperature of the power battery;

[0085] Controlling the refrigeration mode or the heating mode of the passenger cabin and / or the power battery according to the temperature of the passenger cabin and / or the temperature of the power battery.

[0086] In an embodiment, the temperature of the passenger cabin is collected by a first temperature sensor, which can be arranged in the passenger cabin or on the passenger cabin heat exchanger 8.

[0087] The temperature of the power battery is collected by a second temperature sensor, which can be arranged on the outer surface of the single battery and / or on a part of the power battery module.

[0088] The controller controls the refrigeration mode or the heating mode of the passenger cabin and the power battery according to the temperature of the passenger cabin and the temperature of the power battery, and further controls the switching of the four-way reversing valve, the opening and closing of the electronic expansion valve, the on-off of the three-way valve and the electromagnetic valve in the vehicle dual-evaporator thermal management system, controls the double-suction double-rotor electric compressor, the external heat exchanger, the passenger cabin heat exchanger, the battery heat exchanger, the liquid accumulator, the first electronic expansion valve and the second electronic expansion valve to realize the corresponding functions, and further meets the refrigeration or heating requirements of the passenger cabin and the power battery in different modes.

[0089] In an embodiment, the method can further include:

[0090] receiving an option instruction of the heating mode and / or the cooling mode;

[0091] controlling the cooling mode or the heating mode of the passenger cabin and / or the power battery according to the instruction of the heating mode and / or the cooling mode.

[0092] Specifically, the option of the heating mode and / or the cooling mode can be displayed on a display device, the passenger cabin or the power battery is manually selected for heating or cooling, and then the option instruction is transmitted to a controller to control the switching of a four-way reversing valve, the opening and closing of an electronic expansion valve, the on-off of a three-way valve and an electromagnetic valve in the vehicle dual-evaporator thermal management system, control the dual-suction port dual-rotor electric compressor, the vehicle external heat exchanger, the passenger cabin heat exchanger, the battery heat exchanger, the liquid accumulator, the first electronic expansion valve, and the second electronic expansion valve to realize corresponding functions, thereby meeting the cooling or heating requirements of the passenger cabin and the power battery in different modes.

[0093] Based on the above-mentioned vehicle dual-evaporator thermal management control method, the embodiment of the present application further provides a vehicle dual-evaporator thermal management control device, which can be used to implement the vehicle dual-evaporator thermal management control method in the above-mentioned embodiments.

[0094] The vehicle dual-evaporator thermal management control device has a receiving module and a control module.

[0095] The receiving module is configured to receive the temperature of the passenger cabin and / or the temperature of the power battery.

[0096] The control module is configured to control the cooling mode or the heating mode of the passenger cabin and / or the power battery according to the temperature of the passenger cabin and / or the temperature of the power battery.

[0097] Alternatively, the receiving module is configured to receive an option instruction of the heating mode and / or the cooling mode.

[0098] The control module is configured to control the cooling mode or the heating mode of the passenger cabin and / or the power battery according to the instruction of the heating mode and / or the cooling mode.

[0099] For details, refer to the detailed description in the method embodiment, which will not be repeated here.

[0100] Figure 9 is a structural schematic diagram of a computing device 900 provided by an embodiment of the present application. The computing device can be used as a vehicle dual-evaporator thermal management control device to execute each optional embodiment of the above-mentioned vehicle dual-evaporator thermal management control method. The computing device can be a terminal or a chip or chip system inside the terminal. As shown in FIG. 9, the computing device 900 can include a processor 901, a memory 902, a communication interface 903, and a bus 904. Figure 9As shown, the computing device 900 includes a processor 910, a memory 920, and a communication interface 930.

[0101] It should be understood that Figure 9 The communication interface 930 in the computing device 900 as shown can be used for communication with other devices, and can specifically include one or more transceiver circuits or interface circuits.

[0102] The processor 910 can be connected with the memory 920. The memory 920 can be used to store the program code and data. Therefore, the memory 920 can be a storage unit inside the processor 910, can be an external storage unit independent of the processor 910, or can be a component including the storage unit inside the processor 910 and the external storage unit independent of the processor 910.

[0103] Optionally, the computing device 900 can further include a bus. The memory 920 and the communication interface 930 can be connected with the processor 910 through the bus. The bus can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For the convenience of representation, Figure 9 In the figure, a line without an arrow is used, but it does not mean that there is only one bus or only one type of bus.

[0104] It should be understood that in the embodiments of the present application, the processor 910 can be a central processing unit (CPU). The processor can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor. Alternatively, the processor 910 uses one or more integrated circuits to execute related programs to implement the technical solutions provided by the embodiments of the present application.

[0105] The memory 920 can include read-only memory and random access memory, and provide instructions and data to the processor 910. A portion of the processor 910 can also include non-volatile random access memory. For example, the processor 910 can also store device type information.

[0106] When the computing device 900 is running, the processor 910 executes computer-executable instructions in the memory 920 to perform any of the operational steps of the above method and any optional embodiments thereof.

[0107] It should be understood that the computing device 900 according to the embodiments of the present application can correspond to a subject performing the corresponding process in the method according to the embodiments of the present application, and the above and other operations and / or functions of the various modules in the computing device 900 are respectively for implementing the corresponding process of the method according to the embodiments of the present application, and for brevity, will not be repeated here.

[0108] Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be realized in electronic hardware, or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0109] Those of ordinary skill in the art can clearly understand that, for the convenience and brevity of the description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0110] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0111] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiments.

[0112] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit.

[0113] If the functions are realized in the form of software functional units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the parts of the prior art that make contributions or parts of the technical solutions can be embodied in the form of software products. The computer software product is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and various program code storage media.

[0114] The embodiments of the present application also provide a computer readable storage medium, which stores a computer program. The program is executed by a processor to perform the above method, and the method includes at least one of the schemes described in each embodiment.

[0115] The computer storage medium of the embodiments of the present application can adopt any combination of one or more computer readable media. The computer readable medium can be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or component, or any combination thereof. More specific examples (non-exhaustive list) of the computer readable storage medium include: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this document, the computer readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, device or component.

[0116] A computer readable signal medium can include a propagated data signal with computer executable code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated signal can take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium can be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate or transport programming code.

[0117] Program code embodied on a computer readable medium can be transmitted using any appropriate medium, including but not limited to wireless, wire line, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0118] Computer program code for carrying out operations of the present application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0119] In addition, the words "first", "second", "third", etc. or the words "A", "B", "C", etc. as used in the description and the claims, are used only to distinguish between similar objects, not to denote specific ordinal positions or to imply that the objects so distinguished must occur in that order, and are understood to be mutable in that regard. It is understood that the specific order or hierarchy of corresponding parts, sequences of operations, etc., are merely illustrative as to the order of operations, or specific operations performed, and can be susceptible to other examples while still being performed or implemented under the overall approach of the present application as described herein.

[0120] In the description above, the steps involved, represented by the numbers such as S110, S120, etc., do not necessarily mean that the steps are executed in the order as shown, and the order of the steps can be interchanged or the steps can be executed simultaneously, if possible.

[0121] The term "comprising" as used in the specification and in claims includes everything within the scope of the word "comprising" and does not exclude other elements or steps. Thus, it should be interpreted to cover the terms "consisting of" or "consisting essentially of" in addition to "comprising". Accordingly, the expression "a device comprising means A and B" should not be interpreted as being confined to devices consisting only of component A and B, but also to devices consisting of only component A or of only component B, or devices consisting of more than one component A and more than one component B.

[0122] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment, but can refer to different embodiments. Furthermore, the particular features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0123] It is noted that the foregoing are merely preferred embodiments of the present application and the principles of technology used. It is understood by those skilled in the art that the present application is not limited to the specific embodiments described herein, and that various obvious changes, adjustments and substitutions can be made by those skilled in the art without departing from the scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and more other equivalent embodiments can be included without departing from the concept of the present application, and all fall within the scope of the present application.

Claims

1. A dual evaporator thermal management system for a vehicle, characterized by, Comprise: Double-suction double-rotor electric compressor, four-way reversing valve, vehicle exterior heat exchanger, passenger cabin heat exchanger, battery heat exchanger, liquid accumulator, first electronic expansion valve, second electronic expansion valve, first three-way valve, second three-way valve, third three-way valve, first solenoid valve and second solenoid valve; Wherein, the second solenoid valve is connected between the two suction ports of the double-suction double-rotor electric compressor, the first suction port, the first solenoid valve, the third three-way valve, the passenger cabin heat exchanger, the first electronic expansion valve, the first three-way valve, the liquid accumulator, the vehicle exterior heat exchanger, the four-way reversing valve and the exhaust port of the double-suction double-rotor electric compressor are connected in sequence; the first suction port, the first solenoid valve, the battery heat exchanger, the second electronic expansion valve, the second three-way valve, the first three-way valve, the liquid accumulator, the vehicle exterior heat exchanger, the four-way reversing valve and the exhaust port of the double-suction double-rotor electric compressor are connected in sequence; the four-way reversing valve is further connected with the second suction port and the third three-way valve respectively; the second three-way valve is further connected with the passenger cabin heat exchanger and the first electronic expansion valve respectively; the first three-way valve is further connected with the vehicle exterior heat exchanger; Through the reversing of the four-way reversing valve, the opening and closing of the electronic expansion valve, the on-off of the three-way valve and the solenoid valve, under the corresponding action of the double-suction double-rotor electric compressor, the vehicle exterior heat exchanger, the passenger cabin heat exchanger, the battery heat exchanger, the liquid accumulator, the first electronic expansion valve and the second electronic expansion valve, the cooling or heating requirements of the passenger cabin and the power battery in different modes are met; The modes include passenger cabin heating and power battery waste heat recovery mode: Through the reversing of the four-way reversing valve, the opening and closing of the electronic expansion valve, the on-off of the three-way valve and the solenoid valve, under the corresponding action of the double-suction double-rotor electric compressor, the vehicle exterior heat exchanger, the passenger cabin heat exchanger, the battery heat exchanger, the first electronic expansion valve and the second electronic expansion valve, the heating requirement of the passenger cabin and the cooling requirement of the power battery are met, including: The first path and the second path of the four-way reversing valve are connected, the third path and the fourth path are connected; the first electronic expansion valve and the second electronic expansion valve are both opened; the first path and the third path of the first three-way valve are conducted, and the second path is closed; the first path and the third path of the second three-way valve are conducted, and the second path is closed; the second path and the third path of the third three-way valve are conducted, and the first path is closed; the first solenoid valve is connected, and the second solenoid valve is closed; After the refrigerant flows out of the exhaust port of the double-suction double-rotor electric compressor, it flows through the four-way reversing valve, the third three-way valve and the passenger cabin heat exchanger in sequence, and is divided into two paths: the power battery waste heat recovery sub-circuit and the vehicle exterior heat exchanger heat absorption sub-circuit; the refrigerant of the power battery waste heat recovery sub-circuit flows through the second three-way valve, the second electronic expansion valve, the battery heat exchanger and the first solenoid valve in sequence, and flows into the first suction port of the double-suction double-rotor electric compressor; the refrigerant of the vehicle exterior heat exchanger heat absorption sub-circuit flows through the first electronic expansion valve, the first three-way valve, the vehicle exterior heat exchanger and the four-way reversing valve in sequence, and flows into the second suction port of the double-suction double-rotor electric compressor.

2. The system of claim 1, wherein, Further comprise: First temperature sensor, second temperature sensor and controller; The first temperature sensor is used to collect the temperature of the passenger cabin; The second temperature sensor is used to collect the temperature of the power battery; The controller is configured to control a cooling mode or a heating mode of the passenger cabin according to a temperature of the passenger cabin, and / or control a cooling mode or a heating mode of the power battery according to a temperature of the power battery.

3. The system of claim 1, wherein, The mode includes a passenger cabin and power battery cooling mode; Through the switching of the four-way reversing valve, the opening and closing of the electronic expansion valve, the on-off of the three-way valve and the solenoid valve, under the corresponding action of the double-suction double-rotor electric compressor, the vehicle external heat exchanger, the passenger cabin heat exchanger, the battery heat exchanger, the liquid accumulator, the first electronic expansion valve and the second electronic expansion valve, the cooling requirements of the passenger cabin and the power battery are met, including: The first and fourth paths of the four-way reversing valve are connected, and the second and third paths are connected; the first and second paths of the first three-way valve are connected, and the third path is closed; the first and second paths of the second three-way valve are connected, and the third path is closed; the second and third paths of the third three-way valve are connected, and the first path is closed; the first solenoid valve is connected, and the second solenoid valve is closed; After the refrigerant flows out of the exhaust port of the double-suction double-rotor electric compressor, it successively flows through the four-way reversing valve, the vehicle external heat exchanger, the liquid accumulator, the first three-way valve, and the refrigerant is divided into two paths: the passenger cabin sub-loop and the power battery sub-loop, the passenger cabin sub-loop refrigerant successively flows through the first electronic expansion valve, the passenger cabin heat exchanger, the third three-way valve, the four-way reversing valve, and flows into the second suction port of the double-suction double-rotor electric compressor; the power battery sub-loop refrigerant successively flows through the second three-way valve, the second electronic expansion valve, the battery heat exchanger, the first solenoid valve, and flows into the first suction port of the double-suction double-rotor electric compressor.

4. The system of claim 1, wherein, The mode includes a passenger cabin single cooling mode; Through the switching of the four-way reversing valve, the opening and closing of the electronic expansion valve, the on-off of the three-way valve and the solenoid valve, under the corresponding action of the double-suction double-rotor electric compressor, the vehicle external heat exchanger, the passenger cabin heat exchanger, the battery heat exchanger, the liquid accumulator, the first electronic expansion valve and the second electronic expansion valve, the cooling requirements of the passenger cabin are met, including: The first and fourth paths of the four-way reversing valve are connected, and the second and third paths are connected; the first electronic expansion valve is opened, and the second electronic expansion valve is closed; the first and second paths of the first three-way valve are connected, and the third path is closed; the first and second paths of the second three-way valve are connected, and the third path is closed; the second and third paths of the third three-way valve are connected, and the first path is closed; the first solenoid valve is closed, and the second solenoid valve is connected; After the refrigerant flows out of the exhaust port of the double-suction double-rotor electric compressor, it successively flows through the four-way reversing valve, the vehicle external heat exchanger, the liquid accumulator, the first three-way valve, the first electronic expansion valve, the passenger cabin heat exchanger, the third three-way valve, the four-way reversing valve, and is divided into two streams respectively flowing into the two suction ports of the electric compressor.

5. The system of claim 1, wherein, The mode includes a power battery single cooling mode; Through the switching of the four-way reversing valve, the opening and closing of the electronic expansion valve, the on-off of the three-way valve and the solenoid valve, under the corresponding action of the double-suction double-rotor electric compressor, the vehicle external heat exchanger, the passenger cabin heat exchanger, the battery heat exchanger, the liquid accumulator, the first electronic expansion valve and the second electronic expansion valve, the cooling requirements of the power battery are met, including: The first path and the fourth path of the four-way reversing valve are connected, the second path and the third path are connected, the first electronic expansion valve is closed, and the second electronic expansion valve is opened; the first path and the second path of the first three-way valve are connected, the third path is closed, the first path and the second path of the second three-way valve are connected, the third path is closed, the second path and the third path of the third three-way valve are connected, the first path is closed, and the first electromagnetic valve and the second electromagnetic valve are connected. After the refrigerant flows out of the exhaust port of the double-suction double-rotor electric compressor, the refrigerant flows through the four-way reversing valve, the outside heat exchanger, the liquid accumulator, the first three-way valve, the second three-way valve, the second electronic expansion valve, the battery heat exchanger, and the first electromagnetic valve in sequence, and is divided into two streams which flow into the two suction ports of the double-suction double-rotor electric compressor.

6. The system of claim 1, wherein, The mode includes a passenger cabin and a power battery simultaneous heating mode; Through the reversing of the four-way reversing valve, the opening and closing of the electronic expansion valve, and the on-off of the three-way valve and the electromagnetic valve, under the corresponding action of the double-suction double-rotor electric compressor, the outside heat exchanger, the passenger cabin heat exchanger, the battery heat exchanger, the first electronic expansion valve and the second electronic expansion valve, the heating demand of the passenger cabin and the power battery is met, including: The first path and the second path of the four-way reversing valve are connected, the third path and the fourth path are connected, the first electronic expansion valve and the second electronic expansion valve are opened, the first path and the third path of the first three-way valve are connected, the second path is closed, the first path and the second path of the second three-way valve are connected, the third path is closed, the three paths of the third three-way valve are connected, and the first electromagnetic valve is closed and the second electromagnetic valve is connected. After the refrigerant flows out of the exhaust port of the double-suction double-rotor electric compressor, the refrigerant flows through the four-way reversing valve, and is divided into two paths: a passenger cabin sub-loop and a power battery sub-loop after passing through the third three-way valve; the passenger cabin sub-loop refrigerant flows through the passenger cabin heat exchanger and the first electronic expansion valve in sequence; the power battery sub-loop refrigerant flows through the battery heat exchanger, the second electronic expansion valve and the second three-way valve in sequence; the two refrigerant streams flow through the first three-way valve, the outside heat exchanger, the four-way reversing valve, and are divided into two streams which flow into the two suction ports of the double-suction double-rotor electric compressor.

7. The system of claim 1, wherein, The mode includes a passenger cabin single heating mode; Through the reversing of the four-way reversing valve, the opening and closing of the electronic expansion valve, and the on-off of the three-way valve and the electromagnetic valve, under the corresponding action of the double-suction double-rotor electric compressor, the outside heat exchanger, the passenger cabin heat exchanger, the battery heat exchanger, the first electronic expansion valve and the second electronic expansion valve, the heating demand of the passenger cabin is met, including: The first path and the second path of the four-way reversing valve are connected, the third path and the fourth path are connected, the first electronic expansion valve is opened, the second electronic expansion valve is closed, the first path and the third path of the first three-way valve are connected, the second path is closed, the first path and the second path of the second three-way valve are connected, the third path is closed, the second path and the third path of the third three-way valve are connected, the first path is closed, the first electromagnetic valve is closed, and the second electromagnetic valve is connected. After the refrigerant flows out of the exhaust port of the double-suction double-rotor electric compressor, the refrigerant flows through the four-way reversing valve, the third three-way valve, the passenger cabin heat exchanger, the first electronic expansion valve, the first three-way valve, the outside heat exchanger, the four-way reversing valve, and is divided into two streams which flow into the two suction ports of the double-suction double-rotor electric compressor.

8. The system of claim 1, wherein, The mode includes a power battery single heating mode; Through the switching of the four-way switching valve, the opening and closing of the electronic expansion valve, the on-off of the three-way valve and the solenoid valve, under the corresponding action of the double-suction double-rotor electric compressor, the vehicle external heat exchanger, the passenger cabin heat exchanger, the battery heat exchanger, the first electronic expansion valve and the second electronic expansion valve, the heating demand of the power battery is met, including: The first road and the second road of the four-way switching valve are connected, the third road and the fourth road are connected; the first electronic expansion valve is closed, and the second electronic expansion valve is opened; the first road and the third road of the first three-way valve are conducted, and the second road is closed; the first road and the second road of the second three-way valve are conducted, and the third road is closed; the first road and the third road of the third three-way valve are conducted, and the second road is closed; the first solenoid valve is closed, and the second solenoid valve is connected; After the refrigerant flows out of the exhaust port of the double-suction double-rotor electric compressor, it flows through the four-way switching valve, the third three-way valve, the battery heat exchanger, the second electronic expansion valve, the second three-way valve, the first three-way valve, the vehicle external heat exchanger, and the four-way switching valve, and is divided into two streams which respectively flow into the two suction ports of the double-suction double-rotor electric compressor.

9. A vehicle, characterized by Including: The dual-evaporator thermal management system for vehicles according to any one of claims 1 to 8.

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