Heat pump system, heat management system, vehicle, and method for controlling heat pump system

Abstract

The invention discloses a heat pump system, a heat management system, a vehicle and a control method of the heat pump system.The heat pump system comprises a refrigerant circulation assembly and a vacuum suction assembly, the vacuum suction assembly communicates with the refrigerant circulation assembly, and the vacuum suction assembly is provided with a control valve and a vacuum suction module; the control valve is located between the refrigerant circulation assembly and the vacuum suction module and used for controlling connection and disconnection of the refrigerant circulation assembly and the vacuum suction module, and the vacuum suction assembly is used for controlling connection and disconnection of the refrigerant circulation assembly and the vacuum suction module when it is detected that refrigerant leakage of the refrigerant circulation assembly occurs or / and collision occurs around the refrigerant circulation assembly. And a refrigerant of the refrigerant circulation assembly is sucked, and the sucked refrigerant of the refrigerant circulation assembly is stored in the vacuum suction module. According to the heat pump system, when the refrigerant in the refrigerant circulation assembly leaks, the refrigerant in the refrigerant circulation assembly can be pumped into the vacuum suction module, and therefore the risk of ignition and explosion is low.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of thermal management, and more particularly, to a heat pump system, a thermal management system, a vehicle and a control method of the heat pump system. BACKGROUND

[0002] With the development of new energy automobile industry, especially pure electric vehicles, it has become an important direction of modern automobile industry development, and the whole vehicle thermal management technology of new energy vehicles is also becoming more and more important. The heat pump technology for vehicles is a device that uses a small amount of high-grade energy (such as electric energy) to drive a compressor to make heat flow from a low-temperature heat source to a high-temperature heat source. With the development of technology and the demand for environmental protection, new types such as R744 and R290 (propane) refrigerants have broad prospects for use in vehicle heat pump systems. However, due to the flammable and explosive characteristics of the refrigerant R290 (propane) in the heat pump system, the development of this field is limited, and therefore the safety of the R290 heat pump system has always been an important research topic.

[0003] The scheme in the related art mainly reduces the risk of fire caused by the R290 heat pump system by using flame-retardant materials and increasing fireproof isolation layers, but the risk is still high. SUMMARY

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present application is to propose a heat pump system having a low risk of ignition and explosion.

[0005] Another object of the present application is to propose a thermal management system based on the above-mentioned heat pump system.

[0006] Another object of the present application is to propose a control method of a heat pump system based on the above-mentioned heat pump system.

[0007] Another object of the present application is to propose a vehicle having the above-mentioned thermal management system.

[0008] The heat pump system according to an embodiment of the present application comprises: a refrigerant circulation assembly; a vacuum suction assembly in communication with the refrigerant circulation assembly, the vacuum suction assembly being provided with a control valve and a vacuum suction module, the control valve being located between the refrigerant circulation assembly and the vacuum suction module and being used to control the on-off of the refrigerant circulation assembly and the vacuum suction module, the vacuum suction assembly being used to suck the refrigerant of the refrigerant circulation assembly and store the sucked refrigerant of the refrigerant circulation assembly in the vacuum suction module in a state where the refrigerant leakage of the refrigerant circulation assembly is detected or / and a state where a collision occurs around the refrigerant circulation assembly.

[0009] According to an embodiment of the heat pump system of the present invention, a vacuum suction assembly is provided. This assembly includes a control valve and a vacuum suction module. When a refrigerant leak is detected in the refrigerant circulation assembly, or / or a collision occurs around the refrigerant circulation assembly, the control valve opens, connecting the refrigerant circulation assembly and the vacuum suction module. The vacuum suction module then draws refrigerant from the refrigerant circulation assembly and stores the drawn refrigerant within itself. The vacuum suction module in this application can rapidly draw out the refrigerant. Because the refrigerant is absorbed, the possibility of a large amount of refrigerant leaking into the surrounding environment of the thermal management system is reduced, and potential ignition points are isolated. This reduces the possibility of combustion or explosion in the thermal management system, lowers the risk of fire, and improves the safety of the thermal management system.

[0010] In addition, the heat pump system according to the above embodiments of the present invention may also have the following additional technical features:

[0011] According to some embodiments of the present invention, the vacuum suction module includes a vacuum tank and a vacuum source, the vacuum tank being disposed between the vacuum source and the control valve, and the vacuum source being used to suction the vacuum tank to bring the vacuum tank into a vacuum state.

[0012] According to some embodiments of the present invention, the heat pump system further includes a detection component for detecting refrigerant leakage in the refrigerant circulation component and / or collisions occurring around the refrigerant circulation component.

[0013] According to some embodiments of the present invention, the detection component includes a vibration sensor for detecting the degree of vibration around the refrigerant circulation component to obtain a collision state around the refrigerant circulation component; and / or, the detection component includes a pressure sensor for detecting the pressure of the refrigerant circulation component to obtain a leakage state of the refrigerant circulation component; and / or, the detection component includes a gas detector for detecting the concentration of refrigerant around the refrigerant circulation component to obtain a leakage state of the refrigerant circulation component.

[0014] According to some embodiments of the present invention, the refrigerant circulation assembly is provided with a gas-liquid separator and / or a liquid reservoir, and the vacuum suction assembly is connected to the gas-liquid separator and / or the liquid reservoir.

[0015] According to some embodiments of the present invention, the vacuum suction assembly is connected to the bottom of the gas-liquid separator and / or the bottom of the liquid reservoir.

[0016] According to some embodiments of the present application, the refrigerant circulation assembly is sequentially provided with a compressor, a first heat exchanger, a first expansion valve and a second heat exchanger; wherein the first heat exchanger comprises a condenser and a subcooler arranged in series, and the gas-liquid separator is arranged in series between the condenser and the subcooler; or the first heat exchanger comprises a condenser, and the gas-liquid separator is arranged in series between the condenser and the first expansion valve.

[0017] According to some embodiments of the present application, the heat pump system further comprises a refrigerant flow channel plate, at least part of the vacuum suction module and the gas-liquid separator are mounted on the refrigerant flow channel plate, and the gas-liquid separator is in communication with the refrigerant flow channel plate.

[0018] According to some embodiments of the present application, the refrigerant circulation assembly comprises a circulation loop and a parallel branch, the circulation loop is sequentially provided with a compressor, a first heat exchanger, a first expansion valve and a second heat exchanger, and the parallel branch is provided with a second expansion valve, wherein the parallel branch is connected in parallel between an outlet end of the compressor and an inlet end of the second heat exchanger; or the parallel branch is connected in parallel between an inlet end of the compressor and an outlet end of the compressor.

[0019] According to some embodiments of the present application, the refrigerant in the refrigerant circulation assembly is propane.

[0020] The heat management system according to the embodiments of the present application comprises the heat pump system according to the embodiments of the present application.

[0021] The vehicle according to the embodiments of the present application comprises the heat management system according to the embodiments of the present application.

[0022] The control method of the heat pump system according to the embodiments of the present application is based on the heat pump system according to the embodiments of the present application, comprising: in a state where the refrigerant circulation assembly is detected to be leaking or a state where the refrigerant circulation assembly is detected to have a collision, controlling the control valve to be turned on to connect the vacuum suction module and the refrigerant circulation assembly, so that the refrigerant in the refrigerant circulation assembly is sucked and stored in the vacuum suction module.

[0023] The control method of the heat pump system according to the embodiments of the present application, when the refrigerant in the refrigerant circulation assembly leaks or is likely to leak, controls the vacuum suction module to suck the refrigerant in the refrigerant circulation assembly and store the sucked refrigerant in the vacuum suction module, thereby reducing the possibility of the refrigerant leaking to the outside environment in a large amount, thereby reducing the possibility of the heat management system of the present application burning and exploding, reducing the risk of fire, and improving the safety of the heat management system.

[0024] According to some embodiments of the present application, the vacuum suction module controls the control valve to disconnect the vacuum suction module from the refrigerant circulation assembly in a state where the vacuum suction module suctions refrigerant in the refrigerant circulation assembly for a set time length.

[0025] According to some embodiments of the present application, the control method of the heat pump system further comprises: controlling an expansion valve of the refrigerant circulation assembly to switch to a fully open state in a state where the refrigerant circulation assembly is detected to be leaking or in a state where the refrigerant circulation assembly is detected to have collided.

[0026] According to some embodiments of the present application, after the control valve disconnects the vacuum suction module from the refrigerant circulation assembly, the expansion valve of the refrigerant circulation assembly is controlled to be closed.

[0027] Additional aspects and advantages of the present application will be given, partially in the following description, partially become obvious from the following description, or be understood by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0028] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description, taken in conjunction with the following drawings, in which:

[0029] Figure 1 is a structural block diagram of a refrigerant circulation assembly and a vacuum suction assembly in a heat pump system according to embodiments of the present application;

[0030] Figure 2 is a partial structural schematic diagram of a heat management system according to embodiments of the present application;

[0031] Figure 3 is a front view of Figure 1 ;

[0032] Figure 4 is a left side view of Figure 1 ;

[0033] Figure 5 is a top view of Figure 1 ;

[0034] Figure 6 is a rear view of Figure 1 ;

[0035] Figure 7 is a right side view of Figure 1 ;

[0036] Figure 8 is a partial structural block diagram of a heat management system according to embodiments of the present application;

[0037] Figure 9 is a schematic diagram of a vehicle according to embodiments of the present application.

[0038] Reference signs:

[0039] Heat pump system 100;

[0040] Refrigerant circulation assembly 10;

[0041] Gas-liquid separator 101; compressor 102; first heat exchanger 103; condenser 1031; subcooler 1032;

[0042] First expansion valve 104; second heat exchanger 105; second expansion valve 106; circulation loop 107;

[0043] Parallel branch 108; temperature and pressure sensor 109;

[0044] Vacuum suction assembly 20;

[0045] Control valve 201; vacuum suction module 202; vacuum tank 2021; vacuum source 2022;

[0046] Refrigerant flow channel plate 30; detection assembly 40; control assembly 50; water-side circulation loop 60; vehicle 200; thermal management system 300. DETAILED DESCRIPTION

[0047] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals and characters throughout the figures denote the same or like components or elements having the same or similar functions. The embodiments described below are exemplary only, and are not intended to be limiting of the present application.

[0048] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are merely for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0049] In the description of this invention, "first feature" and "second feature" may include one or more of the features, "multiple" means two or more, "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them, and "above," "over," and "on top" the second feature may include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0050] A heat pump system 100 according to an embodiment of the present invention will now be described with reference to the accompanying drawings.

[0051] Reference Figures 1-9 As shown, the heat pump system 100 according to an embodiment of the present invention may include: a refrigerant circulation assembly 10 and a vacuum suction assembly 20. The vacuum suction assembly 20 is connected to the refrigerant circulation assembly 10, and the vacuum suction assembly 20 is provided with a control valve 201 and a vacuum suction module 202. The control valve 201 is located between the refrigerant circulation assembly 10 and the vacuum suction module 202 and is used to control the on / off state of the refrigerant circulation assembly 10 and the vacuum suction module 202. The vacuum suction assembly 20 is used to suction the refrigerant from the refrigerant circulation assembly 10 and store the suctioned refrigerant in the vacuum suction module 202 when a refrigerant leak is detected in the refrigerant circulation assembly 10 or / and when a collision occurs around the refrigerant circulation assembly 10.

[0052] Specifically, to meet the heating requirements of the electric vehicle battery and cabin, and the cooling requirements of the main power electronics, battery, and cabin, the vehicle 200 is typically equipped with a thermal management system 300. The thermal management system 300 may include a heat pump system 100, a battery heat exchange system, a cabin heat exchange system, etc. However, it is not limited to these; the heat pump system 100 in this application can also be applied to other electrical products. The refrigerant circulation assembly 10 refers to a loop with refrigerant circulating. The thermal management system 300 typically also includes a water-side circulation loop 60, which exchanges heat with the refrigerant circulation assembly 10. The refrigerant circulation assembly 10 can be a single circulation loop 107, or it can include a circulation loop 107 and branches connected to the circulation loop 107, such as a parallel branch 108 connected in parallel with the circulation loop 107. All of these should be within the scope of protection of this application.

[0053] The control valve 201 can be a normally closed solenoid valve. When there is no refrigerant leakage in the refrigerant circulation assembly 10 (e.g., when the refrigerant circulation assembly 10 is working normally and when the refrigerant circulation assembly 10 is not working), the control valve 201 is in the closed state, and the refrigerant circulation assembly 10 and the vacuum suction module 202 are in a disconnected state, and the vacuum suction module 202 will not affect the normal circulation process of the refrigerant circulation assembly 10.

[0054] As shown in Figure 8 some embodiments, the detection assembly 40 is configured to detect the refrigerant leakage state of the refrigerant circulation assembly 10, for example, the detection assembly 40 detects that the refrigerant circulation assembly 10 is in a refrigerant leakage state, or the detection assembly 40 detects that the refrigerant circulation assembly 10 is in a refrigerant non-leakage state, for example, by detecting the pressure change of the refrigerant circulation assembly 10 or the refrigerant concentration around the refrigerant circulation assembly 10 to learn the refrigerant leakage state of the refrigerant circulation assembly 10.

[0055] In some embodiments, the detection assembly 40 is configured to detect the collision state around the refrigerant circulation assembly 10, for example, the detection assembly 40 detects that the collision around the refrigerant circulation assembly 10 reaches a set degree, and after the collision reaches the set degree, the refrigerant in the refrigerant circulation assembly 10 is likely to leak; when the detection assembly 40 does not detect the collision around the refrigerant circulation assembly 10 or only detects a collision less than the set degree, the refrigerant circulation assembly 10 is likely not to leak.

[0056] Generally, the refrigerant circulation assembly 10 is provided with a protective assembly, such as a protective shell, and the refrigerant circulation assembly 10 is less likely to be first collided, so as to reduce the possibility of refrigerant leakage in the refrigerant circulation assembly 10, the vacuum pumping assembly 20 pumps the refrigerant of the refrigerant circulation assembly 10 after the protective assembly around the refrigerant circulation assembly 10 is collided to a certain degree, and stores the pumped refrigerant of the refrigerant circulation assembly 10 in the vacuum pumping module 202. In some embodiments of the present application, the detection assembly 40 can also be arranged on the outer wall of the refrigerant circulation assembly 10 to detect the collision state of the refrigerant circulation assembly 10, which should also be within the protection scope of the present application.

[0057] The control assembly 50 is configured to control the opening and closing of the control valve 201 according to the refrigerant leakage state of the refrigerant circulation assembly 10 and / or the collision state around the refrigerant circulation assembly 10, thereby controlling the refrigerant circulation assembly 10 and the vacuum pumping module 202. Specifically, the control assembly 50 can be an integrated control assembly, which is configured to control the operating state of the thermal management system 300, and the integrated control assembly is connected to the vehicle body control assembly. Alternatively, the control assembly 50 can be the vehicle body control assembly, that is, the control valve 201 is directly controlled by the vehicle body control assembly. The control valve 201 has high sensitivity and fast response characteristics, for example, the control valve 201 can be quickly opened after receiving the signal sent by the control assembly 50, and the response time is less than 0.1 seconds.

[0058] The vacuum suction assembly 20 can be provided with one or more vacuum suction assemblies 20, and the plurality of vacuum suction assemblies 20 can be respectively connected to a plurality of positions of the refrigerant circulation assembly 10 to simultaneously suck refrigerant from the plurality of positions of the refrigerant circulation assembly 10. The vacuum suction module 202 has a containing cavity for containing the refrigerant sucked from the refrigerant circulation assembly 10. When the refrigerant in the refrigerant circulation assembly 10 does not leak, the containing cavity can maintain a high vacuum degree, for example, the containing cavity has good sealing performance and can maintain a high vacuum degree for a period of time. When the pressure of the containing cavity is higher than a first set value, the vacuum suction module 202 performs a vacuum suction operation on the containing cavity to reduce the pressure of the containing cavity to below a second set value, wherein the second set value is less than the first set value, so that the vacuum suction module 202 maintains a vacuum state.

[0059] In the state of refrigerant leakage of the refrigerant circulation assembly 10 and / or the state of collision around the refrigerant circulation assembly 10, the control valve 201 is connected to the refrigerant circulation assembly 10 and the vacuum suction module 202. Because the pressure in the refrigerant circulation assembly 10 is much higher than the pressure in the vacuum suction module 202, the refrigerant in the refrigerant circulation assembly 10 can be sucked into the vacuum suction module 202.

[0060] According to the heat pump system 100 of the embodiment of the present application, by providing the vacuum suction assembly 20, the vacuum suction assembly 20 is provided with the control valve 201 and the vacuum suction module 202. In the state of refrigerant leakage of the refrigerant circulation assembly 10 and / or the state of collision around the refrigerant circulation assembly 10, the control valve 201 is opened to connect the refrigerant circulation assembly 10 and the vacuum suction module 202, and the vacuum suction module 202 sucks the refrigerant of the refrigerant circulation assembly 10 and stores the sucked refrigerant of the refrigerant circulation assembly 10 in the vacuum suction module 202. The vacuum suction module 202 in the present application can quickly suck the refrigerant. Because the refrigerant is absorbed, the possibility of a large amount of refrigerant leaking into the surrounding environment of the heat management system 300 can be reduced, and a potential ignition point can be isolated. Therefore, the possibility of combustion and explosion of the heat management system 300 of the present application is reduced, the risk of fire is reduced, and the use safety of the heat management system 300 is improved.

[0061] According to some embodiments of the present application, as Figure 1As shown, the refrigerant circulation assembly 10 includes a gas-liquid separator 101 and / or a liquid receiver, and a vacuum suction assembly 20 is connected to the gas-liquid separator 101 and / or the liquid receiver. The gas-liquid separator 101 and the liquid receiver are typically used to store liquid refrigerant in the refrigerant circulation assembly 10; that is, the amount of liquid refrigerant in the gas-liquid separator 101 and the liquid receiver is relatively large compared to other locations in the refrigerant circulation assembly 100. Since the vacuum suction assembly 20 is connected to the gas-liquid separator 101 and / or the liquid receiver, it can first suction the refrigerant from the gas-liquid separator 101 or the liquid receiver, which helps to quickly draw most of the refrigerant into the vacuum suction module 202, reducing refrigerant leakage. For example, the vacuum suction assembly 20 can be connected to the upper, middle, and lower parts of the gas-liquid separator 101 and / or the upper, middle, and lower parts of the liquid receiver.

[0062] According to some embodiments of the present invention, the vacuum suction assembly 20 is connected to the bottom of the gas-liquid separator 101 and / or the bottom of the liquid reservoir. Due to gravity, the refrigerant in the gas-liquid separator 101 is usually located at the bottom of the gas-liquid separator 101, and the refrigerant in the liquid reservoir is usually located at the bottom of the liquid reservoir. The vacuum suction assembly 20 is directly connected to the bottom of the gas-liquid separator 101 and the bottom of the liquid reservoir. Therefore, when the vacuum suction module 202 is connected to the refrigerant circulation assembly 10, the vacuum suction module 202 can directly and preferentially suction the liquid refrigerant, which is beneficial to quickly suction most of the refrigerant into the vacuum suction module 202 and reduce the amount of refrigerant leakage.

[0063] In some embodiments, the control valve 201 can be directly installed on the gas-liquid separator 101 and / or the liquid reservoir. For example, the control valve 201 can be installed on the side wall of the gas-liquid separator 101 (e.g., Figure 2 , Figure 3 and Figure 5 The control valve 201 can be installed on the side wall, top wall, or bottom wall of the liquid reservoir. The control valve 201 can also be installed in the wall of the gas-liquid separator 101. The control valve 201 can also be installed in the wall of the liquid reservoir.

[0064] According to some embodiments of the present invention, such as Figures 1 to 7 As shown, the refrigerant circulation assembly 10 is provided with a compressor 102, a first heat exchanger 103, a first expansion valve 104 and a second heat exchanger 105 in sequence; wherein, the first heat exchanger 103 includes a condenser 1031 and a subcooler 1032 arranged in series, and a gas-liquid separator 101 is arranged in series between the condenser 1031 and the subcooler 1032.

[0065] The operation principle of the refrigerant circulation assembly 10 can be that the compressor 102 compresses the low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant, and then the high-temperature and high-pressure gaseous refrigerant enters the condenser 1031, the gas-liquid separator 101 and the subcooler 1032 in sequence through the refrigerant flow channel, the high-temperature and high-pressure gaseous refrigerant in the condenser 1031 and the subcooler 1032 dissipates heat to the outside, so that the high-temperature and high-pressure gaseous refrigerant becomes high-pressure liquid refrigerant, the subcooler 1032 can cool the refrigerant to a state lower than its saturation temperature, further reducing the heat of the refrigerant, thereby improving the refrigeration energy efficiency; at the same time, the subcooler 1032 can also reduce the flash gas in the throttling process of the refrigerant through subcooling, reduce the gasification rate, thereby reducing the liquid vaporization loss; then the refrigerant is transported to the first expansion valve 104, the first expansion valve 104 is used to reduce the pressure of the refrigerant and control the flow of the refrigerant, and then the refrigerant passing through the first expansion valve 104 flows into the second heat exchanger 105 through the corresponding refrigerant flow channel, at this time, the refrigerant entering the second heat exchanger 105 absorbs heat from the surrounding, so that the liquid refrigerant becomes low-temperature and low-pressure gaseous refrigerant, and finally enters the compressor 102 through the corresponding refrigerant flow channel, thereby completing the circulation of refrigerant heat transfer; the first heat exchanger 103 and the second heat exchanger 105 exchange heat with the water side circulation loop 60.

[0066] According to some embodiments of the present application, as shown in Figures 1 to 7 The refrigerant circulation assembly 10 is sequentially provided with the compressor 102, the first heat exchanger 103, the first expansion valve 104 and the second heat exchanger 105; the first heat exchanger 103 includes the condenser 1031, and the gas-liquid separator 101 is connected in series between the condenser 1031 and the first expansion valve 104.

[0067] The operation principle of the refrigerant circulation assembly 10 can be that the compressor 102 compresses the low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant, and then the high-temperature and high-pressure gaseous refrigerant enters the condenser 1031, the gas-liquid separator 101 and the subcooler 1032 in sequence through the refrigerant flow channel, the high-temperature and high-pressure gaseous refrigerant in the condenser 1031 and the subcooler 1032 dissipates heat to the outside, so that the high-temperature and high-pressure gaseous refrigerant becomes high-pressure liquid refrigerant, the subcooler 1032 can cool the refrigerant to a state lower than its saturation temperature, further reducing the heat of the refrigerant, thereby improving the refrigeration energy efficiency; at the same time, the subcooler 1032 can also reduce the flash gas in the throttling process of the refrigerant through subcooling, reduce the gasification rate, thereby reducing the liquid vaporization loss; then the refrigerant is transported to the first expansion valve 104, the first expansion valve 104 is used to reduce the pressure of the refrigerant and control the flow of the refrigerant, and then the refrigerant passing through the first expansion valve 104 flows into the second heat exchanger 105 through the corresponding refrigerant flow channel, at this time, the refrigerant entering the second heat exchanger 105 absorbs heat from the surrounding, so that the liquid refrigerant becomes low-temperature and low-pressure gaseous refrigerant, and finally enters the compressor 102 through the corresponding refrigerant flow channel, thereby completing the circulation of refrigerant heat transfer; the first heat exchanger 103 and the second heat exchanger 105 exchange heat with the water side circulation loop 60.

[0068] The gas-liquid separator 101 functions to store the high-pressure liquid refrigerant from the condenser 1031, prevent the refrigerant liquid from flooding the surface of the condenser 1031, and maintain an appropriate amount of liquid refrigerant to regulate and supplement the amount of liquid refrigerant circulating in the components of the refrigerant circulation assembly 10 to adapt to changes in working conditions. In addition, the gas-liquid separator 101 can separate the liquid refrigerant and the gaseous refrigerant, filter out impurities in the refrigerant flow channel, and prevent the impurities from entering the compressor 102 to protect the compressor 102 from liquid damage.

[0069] In some embodiments, the compressor 102, the first heat exchanger 103, the first expansion valve 104, and the second heat exchanger 105 can be connected to each other by separate pipes defining the refrigerant flow channel, or a plurality of the compressor 102, the first heat exchanger 103, the first expansion valve 104, and the second heat exchanger 105 can be integrated on the refrigerant flow channel plate 30 and connected to each other through channels in the refrigerant flow channel plate 30, and the refrigerant flow channel plate 30 defines the refrigerant flow channel.

[0070] In some embodiments, temperature and pressure sensors 109 are arranged at the inlet and outlet ends of the compressor 102 to detect the temperature and pressure at the inlet end and the temperature and pressure at the outlet end of the compressor 102. The detection assembly 40 in the present application can include the temperature and pressure sensors 109.

[0071] In some embodiments, the vacuum suction assembly 20 is in communication with the gas-liquid separator 101 and / or the liquid reservoir. In other embodiments, the vacuum suction assembly 20 can also be in direct communication with the compressor 102, the first heat exchanger 103, the second heat exchanger 105, or the refrigerant flow channel between the above components.

[0072] According to some embodiments of the present application, as shown in Figures 2 to 7 The heat pump system 100 further includes a refrigerant flow channel plate 30, at least part of the vacuum suction module 202 and the gas-liquid separator 101 are mounted on the refrigerant flow channel plate 30, and the gas-liquid separator 101 is in communication with the refrigerant flow channel plate 30. For example, the vacuum suction module 202 includes a vacuum tank 2021 and a vacuum source 2022, and the vacuum tank 2021 and the gas-liquid separator 101 are mounted on the refrigerant flow channel plate 30. Alternatively, the vacuum suction module 202 includes a vacuum tank 2021 and a vacuum source 2022, and the vacuum tank 2021 and the vacuum source 2022 are mounted on the refrigerant flow channel plate 30. In this way, the integration of the components of the heat pump system 100 can be improved, and the heat pump system 100 occupies a smaller space.

[0073] Furthermore, the control valve 201 and the vacuum tank 2021 can be in communication with each other through separate pipes (as shown in Figure 2 and Figure 3(as shown), or the communication channel between the control valve 201 and the vacuum tank 2021 can also be integrated into the flow channel plate to reduce the use of pipes.

[0074] In some embodiments, such as Figures 2 to 7 As shown, the refrigerant flow channel plate 30 can also be integrated with the compressor 102, meaning the compressor 102 is located on and connected to the refrigerant flow channel plate 30. The first heat exchanger 103 and the second heat exchanger 105 can also be located on the refrigerant flow channel plate 30 and connected to the compressor 102 via the refrigerant flow channel plate 30. The first expansion valve 104 can also be located on and connected to the refrigerant flow channel plate 30. This improves the component integration of the thermal management system 300.

[0075] According to some embodiments of the present invention, such as Figures 1 to 3 As shown, the vacuum suction module 202 includes a vacuum tank 2021 and a vacuum source 2022. The vacuum tank 2021 is located between the vacuum source 2022 and the control valve 201. The vacuum source 2022 is used to suction the vacuum tank 2021 to put the vacuum tank 2021 into a vacuum state.

[0076] When the refrigerant circulation assembly 10 is leak-free, the vacuum tank 2021 remains in a vacuum state. For example, when the pressure of the vacuum tank 2021 is higher than a first set value, the vacuum source 2022 evacuates the vacuum tank 2021 to reduce the pressure to a second set value, which is lower than the first set value. The vacuum tank 2021 has a cavity to hold and store refrigerant; therefore, the vacuum tank 2021 needs to have good sealing and structural strength, and is not easily damaged or broken by impact. The vacuum source 2022 can evacuate the vacuum tank 2021, reducing the pressure inside. The vacuum source 2022 can be a separately installed vacuum pump or the existing vacuum pump on the vehicle 200.

[0077] Specifically, a valve is usually provided between the vacuum source 2022 and the vacuum tank 2021. On the one hand, when the pressure of the vacuum tank 2021 is lower than the first set value, the valve is normally closed, so that the vacuum source 2022 does not need to continuously pump the vacuum tank 2021. On the other hand, after the refrigerant circulation assembly 10 leaks, the valve needs to be kept or switched to the closed state to reduce the possibility of refrigerant being drawn to the vacuum source 2022 or to reduce the amount of refrigerant being drawn to the vacuum source 2022.

[0078] According to some embodiments of the present invention, such as Figure 8As shown, the heat pump system 100 further comprises a detection assembly 40, which is configured to detect a leakage state of the refrigerant of the refrigerant circulation assembly 10 and / or a collision state around the refrigerant circulation assembly 10. For example, the detection assembly 40 can comprise a vibration sensor configured to detect a vibration degree around the refrigerant circulation assembly 10 to obtain the collision state around the refrigerant circulation assembly 10; and / or, the detection assembly 40 can comprise a pressure sensor configured to detect a pressure of the refrigerant circulation assembly 10 to obtain the leakage state of the refrigerant circulation assembly 10; and / or, the detection assembly 40 can comprise a gas detector configured to detect a concentration of the refrigerant around the refrigerant circulation assembly 10 to obtain the leakage state of the refrigerant circulation assembly 10.

[0079] That is, the detection assembly 40 can comprise one or more of the vibration sensor, the pressure sensor and the gas detector. In the embodiment in which the detection assembly 40 comprises a plurality of the vibration sensor, the pressure sensor and the gas detector, the detection assembly 40 has a higher detection accuracy, and the refrigerant can be sucked and stored in the vacuum suction module 202 only when the refrigerant leaks.

[0080] In the embodiment in which the heat pump system 100 is applied to the vehicle 200, the vibration sensor can be an original vibration sensor on the vehicle 200, which is configured to detect a collision condition of the vehicle 200, so that the development cost of the heat pump system 100 of the present application is lower. The vibration sensor configured to detect the vibration degree around the refrigerant circulation assembly 10 to obtain the collision state around the refrigerant circulation assembly 10 can be one or more vibration sensors on the vehicle 200 closest to the refrigerant circulation assembly 10. When the vibration sensor closest to the refrigerant circulation assembly 10 detects a state in which the vibration degree is greater than a set degree, the refrigerant circulation assembly 10 is likely to be damaged to cause the refrigerant to leak.

[0081] The pressure sensor can be an original pressure sensor in the heat pump system 100, so as to reduce the production cost of the heat pump system 100 of the embodiment of the present application. The pressure sensor is configured to detect the pressure of the refrigerant circulation assembly 10 to obtain the leakage state of the refrigerant circulation assembly 10. In a normal working state, the pressure in the refrigerant circulation assembly 10 is usually high. When the refrigerant circulation assembly 10 is damaged and the refrigerant leaks, the pressure in the refrigerant circulation assembly 10 will decrease and deviate from the normal pressure change rule in the refrigerant circulation assembly 10. Thus, the leakage state of the refrigerant circulation assembly 10 can be obtained according to the pressure change in the refrigerant circulation assembly 10.

[0082] The detection assembly 40 can include a gas detector configured to detect the concentration of refrigerant around the refrigerant circulation assembly 10 to obtain the leakage state of the refrigerant circulation assembly 10. When the refrigerant circulation assembly 10 leaks, the concentration of refrigerant around the refrigerant circulation assembly 10 increases. Thus, when the gas detector detects that the concentration of refrigerant around the refrigerant circulation assembly 10 is higher than a set value, it can be determined that the refrigerant circulation assembly 10 leaks. When the gas detector detects that the concentration of refrigerant around the refrigerant circulation assembly 10 is lower than the set value, it can be determined that the refrigerant circulation assembly 10 does not leak.

[0083] According to some embodiments of the present application, as shown in Figure 1 The refrigerant circulation assembly 10 includes a circulation loop 107 and a parallel branch 108. The circulation loop 107 is sequentially provided with a compressor 102, a first heat exchanger 103, a first expansion valve 104, and a second heat exchanger 105. The parallel branch 108 is provided with a second expansion valve 106. The parallel branch 108 is connected in parallel between the outlet end of the compressor 102 and the inlet end of the second heat exchanger 105, that is, the compressor 102 and the second heat exchanger 105 are connected in series and connected in parallel with the second expansion valve 106. Alternatively, the parallel branch 108 is connected in parallel between the inlet end of the compressor 102 and the outlet end of the compressor 102, that is, the compressor 102 and the second expansion valve 106 are connected in parallel. That is, when the refrigerant circulates in the circulation loop 107, part of the refrigerant enters the parallel branch 108. By adjusting the opening degree of the first expansion valve 104 and the second expansion valve 106, the operating state of the refrigerant circulation assembly 10 can be controlled, for example, to control the refrigerant to mainly flow in the circulation loop 107. Meanwhile, the compressor 102 and the second expansion valve 106 are connected in parallel, which can reduce the impact of gaseous refrigerant.

[0084] According to some embodiments of the present application, the refrigerant in the refrigerant circulation assembly 10 is propane (R290). As a refrigerant, propane has a high thermal conductivity, a larger latent heat of evaporation, a small molecular weight, good flowability, a lower delivery pressure, and a smaller load on the compressor 102, which can prolong the service life of the compressor 102. However, propane has the characteristic of combustion and explosion. Compared with the heat pump system 100 in the related art that uses propane as a refrigerant, the heat pump system 100 in the embodiments of the present application uses propane as a refrigerant, which is less likely to cause combustion and explosion when the refrigerant in the refrigerant circulation assembly 10 leaks, and is safer to use.

[0085] In other embodiments, the refrigerant in the refrigerant circulation assembly 10 can also be other refrigerants with the characteristic of combustion and explosion.

[0086] As shown in Figure 9As shown, the thermal management system 300 according to an embodiment of the present invention includes a heat pump system 100 according to an embodiment of the present invention. Since the heat pump system 100 according to an embodiment of the present invention has the aforementioned beneficial technical effects, the thermal management system 300 according to an embodiment of the present invention, by providing a vacuum suction assembly 20, which includes a control valve 201 and a vacuum suction module 202, when a refrigerant leak is detected in the refrigerant circulation assembly 10 or / and when a collision occurs around the refrigerant circulation assembly 10, the control valve 201 is opened, connecting the refrigerant circulation assembly 10 and the vacuum suction module 202. The vacuum suction module 202 then suctions the refrigerant from the refrigerant circulation assembly 10 and stores the suctioned refrigerant in the vacuum suction module 202. The vacuum suction module 202 in this application can quickly suction the refrigerant. Since the refrigerant is absorbed, the possibility of a large amount of refrigerant leaking into the surrounding environment of the thermal management system 300 can be reduced, and potential ignition points can be isolated. Thus, the possibility of combustion or explosion of the thermal management system 300 in this application is reduced, the risk of fire is reduced, and the safety of the thermal management system 300 is improved.

[0087] like Figure 9 As shown, the vehicle 200 according to an embodiment of the present invention includes a thermal management system 300 according to an embodiment of the present invention. Since the thermal management system 300 according to an embodiment of the present invention has the aforementioned beneficial technical effects, the vehicle 200 according to an embodiment of the present invention, by providing a vacuum suction assembly 20, which includes a control valve 201 and a vacuum suction module 202, when a refrigerant leak is detected in the refrigerant circulation assembly 10 or / and when a collision occurs around the refrigerant circulation assembly 10, the control valve 201 is opened, connecting the refrigerant circulation assembly 10 and the vacuum suction module 202. The vacuum suction module 202 then suctions the refrigerant from the refrigerant circulation assembly 10 and stores the suctioned refrigerant in the vacuum suction module 202. The vacuum suction module 202 in this application can quickly suction the refrigerant. Since the refrigerant is absorbed, the possibility of a large amount of refrigerant leaking into the surrounding environment of the thermal management system 300 can be reduced, and potential ignition points can be isolated. Thus, the possibility of combustion or explosion of the thermal management system 300 in this application is reduced, the risk of fire is reduced, and the safety of the thermal management system 300 is improved.

[0088] The vehicle 200 can be a new energy vehicle. In some embodiments, the new energy vehicle can be a pure electric vehicle with the motor 20 as the main driving force. In other embodiments, the new energy vehicle can also be a hybrid vehicle with an internal combustion engine and a motor as the main driving force. The internal combustion engine mentioned in the above embodiments can use gasoline, diesel, hydrogen, etc. as fuel, and the motor can use a power battery, a hydrogen fuel cell, etc. to provide power, which is not limited here. It should be noted that the above description is only an exemplary description of the structure of the new energy vehicle, and does not limit the protection scope of the present application.

[0089] The other configurations and operations of the thermal management system 300 and the vehicle 200 according to the embodiments of the present application are known to those skilled in the art, and will not be described in detail here.

[0090] The control method of the heat pump system according to the embodiments of the present application is based on the heat pump system 100 according to the embodiments of the present application, which includes: in a state where the refrigerant circulation assembly 10 is detected to be leaking or a state where a collision around the refrigerant circulation assembly 10 is detected, controlling the control valve 201 to conduct the vacuum suction module 202 and the refrigerant circulation assembly 10, so that the refrigerant of the refrigerant circulation assembly 10 is sucked and stored in the vacuum suction module 202.

[0091] In a state where the refrigerant circulation assembly 10 is detected to be leaking or a state where a collision around the refrigerant circulation assembly 10 is detected, the control valve 201 is controlled to conduct the vacuum suction module 202 and the refrigerant circulation assembly 10. Here, the control valve 201 can be controlled to conduct when the refrigerant circulation assembly 10 is detected to be leaking or a collision around the refrigerant circulation assembly 10 is detected. Alternatively, the control valve 201 can be controlled to conduct after a delay of a period of time after the refrigerant circulation assembly 10 is detected to be leaking or a collision around the refrigerant circulation assembly 10 is detected. It should be noted that the period of time is usually very short, for example, less than 1s.

[0092] The control method of the thermal management system according to the embodiments of the present application, when the refrigerant in the refrigerant circulation assembly 10 leaks or is likely to leak, controls the vacuum suction module 202 to suck the refrigerant in the refrigerant circulation assembly 10 and store the sucked refrigerant in the vacuum suction module 202, thereby reducing the possibility of the refrigerant leaking to the outside environment in large quantities, thereby reducing the possibility of the thermal management system 300 of the present application burning and exploding, reducing the risk of fire, and improving the safety of the thermal management system 300.

[0093] According to some embodiments of the present application, the control valve 201 is controlled to disconnect the vacuum suction module 202 from the refrigerant circulation assembly 10 when the vacuum suction module 202 has sucked the refrigerant in the refrigerant circulation assembly 10 for a set time period.

[0094] When the vacuum suction module 202 has sucked the refrigerant in the refrigerant circulation assembly 10 for a set time period, most of the refrigerant in the refrigerant circulation assembly 10 has been sucked into the vacuum suction module 202, and the specific value of the first set time period can be reasonably selected according to the total amount of refrigerant in the circulation loop 107, the vacuum degree of the vacuum suction module 202, the volume of the vacuum suction module 202, the change of the vacuum degree of the vacuum suction module 202 after sucking the refrigerant, and the like.

[0095] When the vacuum suction module 202 has sucked the refrigerant in the refrigerant circulation assembly 10 for a set time period, the control valve 201 is controlled to disconnect the vacuum suction module 202 from the refrigerant circulation assembly 10, so as to reduce the possibility of the refrigerant in the vacuum suction module 202 flowing back to the refrigerant circulation assembly 10.

[0096] According to some embodiments of the present application, the control method of the thermal management system further comprises: controlling the expansion valve of the refrigerant circulation assembly 10 to switch to a fully open state when it is detected that the refrigerant circulation assembly 10 leaks or when it is detected that a collision occurs around the refrigerant circulation assembly 10. Here, the expansion valve of the refrigerant circulation assembly 10 can be the first expansion valve 104, or the expansion valve of the refrigerant circulation assembly 10 can be the second expansion valve 106, or the expansion valve of the refrigerant circulation assembly 10 can be the first expansion valve 104 and the second expansion valve 106.

[0097] When it is detected that the refrigerant circulation assembly 10 leaks or when it is detected that a collision occurs around the refrigerant circulation assembly 10, the expansion valve of the refrigerant circulation assembly 10 is controlled to switch to a fully open state, that is, at this time, the flow area of the refrigerant circulation assembly 10 reaches the maximum, and the flow resistance of the refrigerant is small, which is conducive to the refrigerant flowing to the control valve 201 as much as possible to be sucked into the vacuum suction module 202.

[0098] According to some embodiments of the present application, after the control valve 201 is controlled to disconnect the vacuum suction module 202 from the refrigerant circulation assembly 10, that is, after the vacuum suction module 202 stops sucking the refrigerant circulation assembly 10, the expansion valve of the refrigerant circulation assembly 10 is controlled to be closed. Here, the control of the expansion valve of the refrigerant circulation assembly 10 to be closed can be the control of the first expansion valve 104 and the second expansion valve 106 to be closed at the same time.

[0099] Here, the expansion valve of the refrigerant circulation assembly 10 is controlled to be closed when the control valve 201 is opened to disconnect the vacuum pumping module 202 from the refrigerant circulation assembly 10, or the expansion valve of the refrigerant circulation assembly 10 is controlled to be closed after the control valve 201 is opened to disconnect the vacuum pumping module 202 from the refrigerant circulation assembly 10 for a period of time. When the refrigerant leakage point is located at a certain position of the refrigerant circulation assembly 10, for example, at the refrigerant flow passage between the second heat exchanger 105 and the compressor 102, closing the expansion valve in the circulation loop 107 is beneficial to leave a small amount of refrigerant that is not pumped in the circulation loop 107 and is not easy to leak to the external environment from the leakage point, thus being beneficial to further reduce the amount of refrigerant leakage.

[0100] The heat pump system 100 and the control method of the heat pump system according to one specific embodiment of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the following description is only exemplary and should not be construed as limiting the application.

[0101] As shown in Figures 1 to 9 , the heat pump system 100 is applied to a vehicle 200 and includes a refrigerant circulation assembly 10 and a vacuum pumping assembly 20.

[0102] The refrigerant circulation assembly 10 includes a circulation loop 107 and a parallel branch 108, the circulation loop 107 is sequentially provided with a compressor 102, a first heat exchanger 103, a first expansion valve 104 and a second heat exchanger 105, and the parallel branch 108 is provided with a second expansion valve 106, wherein the parallel branch 108 is connected in parallel between the outlet end of the compressor 102 and the inlet end of the second heat exchanger 105.

[0103] The first heat exchanger 103 includes a condenser 1031 and a subcooler 1032 connected in series, and a gas-liquid separator 101 is connected in series between the condenser 1031 and the subcooler 1032.

[0104] The vacuum pumping assembly 20 is connected to the bottom of the gas-liquid separator 101, and the vacuum pumping assembly 20 is provided with a control valve 201 and a vacuum pumping module 202, the control valve 201 is located between the refrigerant circulation assembly 10 and the vacuum pumping module 202 and is used to control the connection and disconnection of the refrigerant circulation assembly 10 and the vacuum pumping module 202. The heat pump system 100 further includes a detection assembly 40 for detecting the leakage state of the refrigerant of the refrigerant circulation assembly 10 and the collision state around the refrigerant circulation assembly 10.

[0105] The detection assembly 40 includes a vibration sensor for detecting the degree of vibration around the refrigerant circulation assembly 10 to obtain a collision-occurring state around the refrigerant circulation assembly 10; the detection assembly 40 includes a pressure sensor for detecting the pressure of the refrigerant circulation assembly 10 to obtain a leakage state of the refrigerant circulation assembly 10; and the detection assembly 40 includes a gas detector for detecting the concentration of the refrigerant around the refrigerant circulation assembly 10 to obtain a leakage state of the refrigerant circulation assembly 10.

[0106] The vacuum suction assembly 20 is used to suction the refrigerant of the refrigerant circulation assembly 10 and store the suctioned refrigerant of the refrigerant circulation assembly 10 in the vacuum suction module 202 in a state where the refrigerant leakage of the refrigerant circulation assembly 10 is detected and / or a state where the collision around the refrigerant circulation assembly 10 occurs.

[0107] The vacuum suction module 202 includes a vacuum tank 2021 and a vacuum source 2022, the vacuum tank 2021 is arranged between the vacuum source 2022 and the control valve 201, and the vacuum source 2022 is used to suck the vacuum tank 2021 to make the vacuum tank 2021 in a vacuum state. The refrigerant in the refrigerant circulation assembly 10 is propane.

[0108] The refrigerant circulation assembly 10 further includes a refrigerant flow channel plate 30, the first heat exchanger 103, the second heat exchanger 105, the compressor 102, the first expansion valve 104, the second expansion valve 106, the gas-liquid separator 101 and the vacuum tank 2021 are all installed on the refrigerant flow channel plate 30, and the first heat exchanger 103, the second heat exchanger 105, the compressor 102, the first expansion valve 104, the second expansion valve 106, the gas-liquid separator 101 and the refrigerant flow channel plate 30 are in communication.

[0109] The control method of the thermal management system includes: in a state where the refrigerant circulation assembly 10 is detected to leak or a state where the collision around the refrigerant circulation assembly 10 is detected, controlling the control valve 201 to turn on the vacuum suction module 202 and the refrigerant circulation assembly 10, so that the refrigerant of the refrigerant circulation assembly 10 is suctioned and stored in the vacuum suction module 202, and at the same time, controlling the expansion valve of the refrigerant circulation assembly 10 to switch to a fully open state.

[0110] In a state where the vacuum suction module 202 suctions the refrigerant in the refrigerant circulation assembly 10 for a set time length, the control valve 201 is controlled to turn off the vacuum suction module 202 and the refrigerant circulation assembly 10, and after the control valve 201 turns off the vacuum suction module 202 and the refrigerant circulation assembly 10, the expansion valve of the refrigerant circulation assembly 10 is controlled to be closed.

[0111] The heat pump system 100 of the embodiment, the vacuum source 2022 can be the original vacuum source of the vehicle, only need to set the control valve 201 and the vacuum tank 2021, can not increase the complexity and cost of the heat pump system 100 too much, simple structure, easy to realize. The detection assembly 40 can monitor the concentration of the refrigerant of the refrigerant circulating assembly 10 and the collision signal of the vehicle body of the vehicle 200 in real time, when the refrigerant leaks, the refrigerant of the refrigerant circulating assembly 10 is quickly absorbed and closed, to avoid harm to the environment and human health, at the same time, it can also effectively isolate the potential ignition point, effectively prevent the leakage of the refrigerant and the spread of the fire, thereby improving the fire safety, greatly avoiding the possibility of fire and explosion, which can improve the safety of the driver and passenger, and the safety of the vehicle 200 is also guaranteed, and it has strong adaptability.

[0112] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0113] In the description of the present application, the description of the terms "embodiment", "specific embodiment", "example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0114] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A heat pump system, characterized by, The system comprises: a refrigerant circulation assembly; a vacuum suction assembly in communication with the refrigerant circulation assembly, the vacuum suction assembly comprising a control valve and a vacuum suction module, the control valve being arranged in series between the refrigerant circulation assembly and the vacuum suction module and being used to control the on-off of the refrigerant circulation assembly and the vacuum suction module, the vacuum suction assembly being used to suck the refrigerant of the refrigerant circulation assembly and store the sucked refrigerant of the refrigerant circulation assembly in the vacuum suction module in a state of detecting refrigerant leakage of the refrigerant circulation assembly and / or a state of collision around the refrigerant circulation assembly.

2. The heat pump system of claim 1, wherein, The vacuum suction module comprises a vacuum tank and a vacuum source, the vacuum tank being arranged between the vacuum source and the control valve, and the vacuum source being used to suck the vacuum tank to make the vacuum tank in a vacuum state.

3. The heat pump system of claim 1, wherein, Further comprising a detection assembly, the detection assembly being used to detect the leakage state of the refrigerant of the refrigerant circulation assembly and / or the collision state around the refrigerant circulation assembly.

4. The heat pump system of claim 3, wherein, The detection assembly comprises a vibration sensor, the vibration sensor being used to detect the vibration degree around the refrigerant circulation assembly to obtain the collision state around the refrigerant circulation assembly; and / or, the detection assembly comprises a pressure sensor, the pressure sensor being used to detect the pressure of the refrigerant circulation assembly to obtain the leakage state of the refrigerant circulation assembly; and / or, the detection assembly comprises a gas detector, the gas detector being used to detect the concentration of the refrigerant around the refrigerant circulation assembly to obtain the leakage state of the refrigerant circulation assembly.

5. The heat pump system of claim 1, wherein, The refrigerant circulation assembly is provided with a gas-liquid separator and / or a liquid accumulator, and the vacuum suction assembly is in communication with the gas-liquid separator and / or the liquid accumulator.

6. The heat pump system of claim 5, wherein, The vacuum suction assembly is in communication with the bottom of the gas-liquid separator and / or the bottom of the liquid accumulator.

7. The heat pump system of claim 5, wherein, The refrigerant circulation assembly is sequentially provided with a compressor, a first heat exchanger, a first expansion valve and a second heat exchanger; wherein the first heat exchanger comprises a condenser and a subcooler arranged in series, and the gas-liquid separator is arranged in series between the condenser and the subcooler; or the first heat exchanger comprises a condenser, and the gas-liquid separator is arranged in series between the condenser and the first expansion valve.

8. Heat pump system according to any of claims 5-7, characterized in that, Further comprising a refrigerant flow channel plate, at least part of the vacuum suction module and the gas-liquid separator are mounted on the refrigerant flow channel plate, and the gas-liquid separator is in communication with the refrigerant flow channel plate.

9. The heat pump system of claim 1, wherein, The refrigerant circulation assembly comprises a circulation loop and a parallel branch, the circulation loop is sequentially provided with a compressor, a first heat exchanger, a first expansion valve and a second heat exchanger, and the parallel branch is provided with a second expansion valve, wherein the parallel branch is connected in parallel between the outlet end of the compressor and the inlet end of the second heat exchanger; or the parallel branch is connected in parallel between the inlet end of the compressor and the outlet end of the compressor.

10. The heat pump system of claim 1, wherein, The refrigerant in the refrigerant circulation assembly is propane.

11. A thermal management system, characterized by, The system comprises the heat pump system according to any one of claims 1-10.

12. A vehicle characterized by comprising: The system comprises the thermal management system according to claim 11.

13. A control method of a heat pump system, characterized by, The heat pump system according to any one of claims 1-10, further comprising: In a state where leakage of the refrigerant circulation assembly is detected or a state where a collision around the refrigerant circulation assembly is detected, the control valve is controlled to be turned on to connect the vacuum suction module to the refrigerant circulation assembly, so that refrigerant in the refrigerant circulation assembly is sucked and stored in the vacuum suction module.

14. The control method of a heat pump system according to claim 13, characterized by, In a state where the vacuum suction module sucks refrigerant in the refrigerant circulation assembly for a set time length, the control valve is controlled to be turned off to disconnect the vacuum suction module from the refrigerant circulation assembly.

15. The control method of a heat pump system according to claim 13, characterized by, Further comprising: In a state where leakage of the refrigerant circulation assembly is detected or a state where a collision around the refrigerant circulation assembly is detected, the expansion valve of the refrigerant circulation assembly is controlled to be switched to a fully open state.

16. The control method of a heat pump system according to claim 15, characterized by, After the control valve is turned off to disconnect the vacuum suction module from the refrigerant circulation assembly, the expansion valve of the refrigerant circulation assembly is controlled to be closed.

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