Heat pump system, heat management system and vehicle

Abstract

The utility model discloses a heat pump system, a heat management system and a vehicle, the heat pump system comprises a refrigerant circulation assembly and a vacuum suction assembly, the vacuum suction assembly is communicated 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 utility model relates to the technical field of thermal management, and more specifically, to a heat pump system, a thermal management system and a vehicle. Background Art

[0002] As the new energy vehicle industry develops faster and faster, especially pure electric vehicles, which have become an important direction for the development of the modern automobile industry, the thermal management technology of new energy vehicles is becoming more and more important. Automotive heat pump technology is a device that uses a small amount of high-quality energy (such as electricity) to drive the 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 refrigerants such as R744 and R290 (propane) have broad prospects for use in automotive heat pump systems. However, due to the flammable and explosive characteristics of the refrigerant R290 (propane) in the heat pump system, the technological development in this field is limited. Therefore, the safety of the R290 heat pump system has always been an important research topic.

[0003] The solutions in the related technology mainly reduce the risk of fire caused by the R290 heat pump system by using flame retardant materials, adding fire-proof isolation layers, etc., but the risk is still high. Utility Model Content

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

[0005] Another object of the present invention is to provide a thermal management system based on the above heat pump system.

[0006] Another object of the present invention is to provide a vehicle with the above thermal management system.

[0007] According to the heat pump system of the embodiment of the utility model, it includes: a refrigerant circulation component; a vacuum suction component, the vacuum suction component is connected to the refrigerant circulation component, the vacuum suction component is provided with a control valve and a vacuum suction module, the control valve is located between the refrigerant circulation component and the vacuum suction module and is used to control the on and off of the refrigerant circulation component and the vacuum suction module, the vacuum suction component is used to suck the refrigerant of the refrigerant circulation component and store the sucked refrigerant of the refrigerant circulation component in the vacuum suction module when a refrigerant leakage of the refrigerant circulation component is detected or / and a collision occurs around the refrigerant circulation component.

[0008] According to the heat pump system of the embodiment of the utility model, a vacuum suction component is provided, and the vacuum suction component is provided with a control valve and a vacuum suction module. When a refrigerant leakage of the refrigerant circulation component is detected or / and a collision occurs around the refrigerant circulation component, the control valve will be opened to connect the refrigerant circulation component and the vacuum suction module, and the vacuum suction module will suck the refrigerant of the refrigerant circulation component and store the sucked refrigerant of the refrigerant circulation component in the vacuum suction module. The vacuum suction module in the present application can quickly suck 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 can be reduced, and potential fire points can be isolated, thereby reducing the possibility of combustion and explosion of the thermal management system of the present application, reducing the risk of fire, and improving the safety of the use of the thermal management system.

[0009] In addition, the heat pump system according to the above embodiment of the utility model may also have the following additional technical features:

[0010] According to some embodiments of the utility model, the vacuum suction module includes a vacuum tank and a vacuum source, the vacuum tank is arranged between the vacuum source and the control valve, and the vacuum source is used to suck the vacuum tank so that the vacuum tank is in a vacuum state.

[0011] According to some embodiments of the present invention, the heat pump system further includes a detection component, which is used to detect a leakage state of the refrigerant of the refrigerant circulation component and / or a collision state around the refrigerant circulation component.

[0012] According to some embodiments of the utility model, the detection component includes a vibration sensor, which is used to detect the vibration degree around the refrigerant circulation component to obtain the collision status around the refrigerant circulation component; and / or, the detection component includes a pressure sensor, which is used to detect the pressure of the refrigerant circulation component to obtain the leakage status of the refrigerant circulation component; and / or, the detection component includes a gas detector, which is used to detect the concentration of the refrigerant around the refrigerant circulation component to obtain the leakage status of the refrigerant circulation component.

[0013] According to some embodiments of the utility model, the refrigerant circulation component is provided with a gas-liquid separator and / or a liquid reservoir, and the vacuum suction component is connected to the gas-liquid separator and / or the liquid reservoir.

[0014] 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.

[0015] According to some embodiments of the utility model, the refrigerant circulation component is provided with a compressor, a first heat exchanger, a first expansion valve and a second heat exchanger in sequence; wherein, the first heat exchanger includes 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 includes a condenser, and the gas-liquid separator is arranged in series between the condenser and the first expansion valve.

[0016] According to some embodiments of the present invention, the heat pump system further includes a refrigerant flow plate, at least a portion of the vacuum suction module and the gas-liquid separator are both installed on the refrigerant flow plate, and the gas-liquid separator is in communication with the refrigerant flow plate.

[0017] According to some embodiments of the utility model, the refrigerant circulation component includes a circulation loop and a parallel branch, the circulation loop is provided with a compressor, a first heat exchanger, a first expansion valve and a second heat exchanger in sequence, 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.

[0018] According to some embodiments of the present invention, the refrigerant in the refrigerant circulation component is propane.

[0019] The thermal management system according to the embodiment of the present invention includes the heat pump system according to the embodiment of the present invention.

[0020] A vehicle according to an embodiment of the present invention includes a thermal management system according to an embodiment of the present invention.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 It is a structural block diagram of a refrigerant circulation component and a vacuum suction component in a heat pump system according to an embodiment of the utility model;

[0024] Figure 2 is a partial three-dimensional structural schematic diagram of a thermal management system according to an embodiment of the utility model;

[0025] Figure 3 yes Figure 1 Front view of

[0026] Figure 4 yes Figure 1 Left side view;

[0027] Figure 5 yes Figure 1 A top view of

[0028] Figure 6 yes Figure 1 Rear view of

[0029] Figure 7 yes Figure 1 Right side view;

[0030] Figure 8 is a partial structural block diagram of a thermal management system according to an embodiment of the utility model;

[0031] Fig. 9 is a schematic diagram of a vehicle according to an embodiment of the utility model.

[0032] Reference numerals:

[0033] Heat pump system 100;

[0034] Refrigerant circulation component 10;

[0035] Gas-liquid separator 101; compressor 102; first heat exchanger 103; condenser 1031; subcooler 1032;

[0036] First expansion valve 104; second heat exchanger 105; second expansion valve 106; circulation loop 107;

[0037] Parallel branch 108; temperature and pressure sensor 109;

[0038] Vacuum suction assembly 20;

[0039] Control valve 201; vacuum suction module 202; vacuum tank 2021; vacuum source 2022;

[0040] Refrigerant channel plate 30; detection component 40; control component 50; water side circulation loop 60;

[0041] Vehicle 200 ; Thermal management system 300 . DETAILED DESCRIPTION

[0042] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In the description of the present invention, "first feature" and "second feature" may include one or more such features, "plurality" means two or more, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them, the first feature "above", "above" and "above" the second feature may include the first feature being directly above and diagonally above the second feature, or may simply mean that the first feature is at a higher level than the second feature.

[0045] A heat pump system 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0046] Reference Figure 1-Figure 9 As shown, the heat pump system 100 according to the embodiment of the utility model may include: a refrigerant circulation component 10 and a vacuum suction component 20. The vacuum suction component 20 is connected to the refrigerant circulation component 10, and the vacuum suction component 20 is provided with a control valve 201 and a vacuum suction module 202. The control valve 201 is located between the refrigerant circulation component 10 and the vacuum suction module 202 and is used to control the on-off of the refrigerant circulation component 10 and the vacuum suction module 202. The vacuum suction component 20 is used to suck the refrigerant of the refrigerant circulation component 10 and store the sucked refrigerant of the refrigerant circulation component 10 in the vacuum suction module 202 when the refrigerant leakage of the refrigerant circulation component 10 is detected or / and the collision occurs around the refrigerant circulation component 10.

[0047] Specifically, in order to meet the heating requirements of electric vehicle batteries and cabins, and the cooling requirements of main power electronics, batteries and cabins, the vehicle 200 is usually provided with a thermal management system 300, and the thermal management system 300 may include a heat pump system 100, a battery heat exchange system, a cabin heat exchange system, and the like. However, it is not limited thereto, and the heat pump system 100 in the present application may also be applied to other electrical products. The refrigerant circulation component 10 refers to a circuit in which a refrigerant circulates, and the thermal management system 300 generally also includes a water side circulation loop 60, which exchanges heat with the refrigerant circulation component 10. The refrigerant circulation component 10 may be a single circulation loop 107, or it may include a circulation loop 107 and a branch connected to the circulation loop 107, for example, a parallel branch 108 connected in parallel to the circulation loop 107, all of which should be within the scope of protection of the present application.

[0048] The control valve 201 can be a normally closed solenoid valve. When there is no leakage of refrigerant in the refrigerant circulation component 10 (for example, when the refrigerant circulation component 10 is working normally or when the refrigerant circulation component 10 is not working), the control valve 201 is in a closed state, and the refrigerant circulation component 10 and the vacuum suction module 202 are in a disconnected state. The vacuum suction module 202 will not affect the normal circulation process of the refrigerant circulation component 10.

[0049] like Figure 8 As shown, the heat pump system 100 may be provided with a detection component 40 and a control component 50. In some embodiments, the detection component 40 is used to detect the refrigerant leakage state of the refrigerant circulation component 10, for example, the detection component 40 detects that the refrigerant circulation component 10 is in a refrigerant leakage state, or the detection component 40 detects that the refrigerant circulation component 10 is in a refrigerant non-leakage state, for example, by detecting the pressure change of the refrigerant circulation component 10 or the refrigerant concentration around the refrigerant circulation component 10 to know the refrigerant leakage state of the refrigerant circulation component 10.

[0050] In some embodiments, the detection component 40 is used to detect the collision status around the refrigerant circulation component 10. For example, the detection component 40 detects that a set degree of collision has occurred around the refrigerant circulation component 10. After a collision greater than or equal to the set degree has occurred, the refrigerant in the refrigerant circulation component 10 is likely to have leaked. When the detection component 40 does not detect a collision around the refrigerant circulation component 10, or only detects a collision less than the set degree, the refrigerant circulation component 10 is likely not to have leaked.

[0051] Usually, a protective component, such as a protective shell, is provided around the refrigerant circulation component 10. The probability of the refrigerant circulation component 10 being hit first is low. Therefore, in order to reduce the possibility of refrigerant leakage in the refrigerant circulation component 10, after the protective component around the refrigerant circulation component 10 is hit to a certain extent, the vacuum suction component 20 sucks the refrigerant of the refrigerant circulation component 10 and stores the sucked refrigerant of the refrigerant circulation component 10 in the vacuum suction module 202. In some embodiments of the present application, a detection component 40 can also be provided on the outer wall of the refrigerant circulation component 10 to detect the collision state of the refrigerant circulation component 10, which should also be within the protection scope of the present application.

[0052] The control component 50 is used to control the opening and closing of the control valve 201 to control the on and off of the refrigerant circulation component 10 and the vacuum suction module 202 according to the state of refrigerant leakage of the refrigerant circulation component 10 or / and the state of collision around the refrigerant circulation component 10. Specifically, the control component 50 can be an integrated control component, which is used to control the operating state of the thermal management system 300, and the integrated control component is connected to the body control component. Or the control component 50 can be a body control component, that is, the control valve 201 is directly controlled by the body control component. The control valve 201 has high sensitivity and fast response characteristics. For example, the control valve 201 can be opened quickly after receiving the signal sent by the control component 50, and the response time is less than 0.1 seconds.

[0053] There may be one or more vacuum suction components 20, and the multiple vacuum suction components 20 may be respectively connected to multiple positions of the refrigerant circulation component 10, so as to simultaneously suction multiple positions of the refrigerant circulation component 10. The vacuum suction module 202 has a receiving chamber for receiving the refrigerant sucked out from the refrigerant circulation component 10. When the refrigerant in the refrigerant circulation component 10 does not leak, the receiving chamber can maintain a relatively high vacuum degree. For example, the receiving chamber has a relatively good sealing performance and can maintain a relatively high vacuum degree for a period of time. At the same time, when the pressure of the receiving chamber is higher than the first set value, the vacuum suction module 202 will perform a vacuum operation on the receiving chamber to reduce the pressure of the receiving chamber to below the 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.

[0054] When the refrigerant in the refrigerant circulation component 10 is leaking or / and collides with the surrounding area of ​​the refrigerant circulation component 10, the control valve 201 will connect the refrigerant circulation component 10 and the vacuum suction module 202. Since the pressure in the refrigerant circulation component 10 is much higher than the pressure in the vacuum suction module 202, the refrigerant in the refrigerant circulation component 10 can be sucked into the vacuum suction module 202.

[0055] According to the heat pump system 100 of the embodiment of the utility model, by setting a vacuum suction component 20, the vacuum suction component 20 is provided with a control valve 201 and a vacuum suction module 202. When the refrigerant leakage of the refrigerant circulation component 10 is detected or / and the collision occurs around the refrigerant circulation component 10, the control valve 201 will be opened to connect the refrigerant circulation component 10 and the vacuum suction module 202, and the vacuum suction module 202 will suck the refrigerant of the refrigerant circulation component 10 and store the sucked refrigerant of the refrigerant circulation component 10 in the vacuum suction module 202. The vacuum suction module 202 in the present application can quickly suck 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 fire points can be isolated, thereby reducing the possibility of combustion and explosion of the thermal management system 300 of the present application, reducing the risk of fire, and improving the safety of the use of the thermal management system 300.

[0056] According to some embodiments of the present invention, Figure 1 As shown, the refrigerant circulation component 10 is provided with a gas-liquid separator 101 and / or a liquid reservoir, and the vacuum suction component 20 is connected to the gas-liquid separator 101 and / or the liquid reservoir. The gas-liquid separator 101 and the liquid reservoir are usually used to store the liquid refrigerant in the refrigerant circulation component 10, that is, the liquid refrigerant in the gas-liquid separator 101 and the liquid reservoir is more, and the amount of refrigerant is high compared to other positions of the refrigerant circulation component 10. The vacuum suction component 20 is connected to the gas-liquid separator 101 and / or the liquid reservoir, so that the vacuum suction component 20 can first suck the refrigerant in the gas-liquid separator 101 or the liquid reservoir, which is conducive to quickly sucking most of the refrigerant into the vacuum suction module 202 as much as possible, reducing the amount of refrigerant leakage. For example, the vacuum suction component 20 can be connected to the upper, middle, lower part of the gas-liquid separator 101 and / or the upper, middle, and lower part of the liquid reservoir.

[0057] According to some embodiments of the utility model, the vacuum suction component 20 is connected to the bottom of the gas-liquid separator 101 and / or the bottom of the liquid reservoir. Due to the effect of 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 component 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 component 10, the vacuum suction module 202 can directly and preferentially suck the liquid refrigerant, which is conducive to quickly sucking most of the refrigerant into the vacuum suction module 202 as much as possible, reducing the amount of refrigerant leakage.

[0058] In some embodiments, the control valve 201 can be directly mounted on the gas-liquid separator 101 and / or the liquid reservoir. For example, the control valve 201 can be mounted on the side wall of the gas-liquid separator 101 (e.g. Figure 2 , Figure 3 and Figure 5 ), top wall, and bottom wall, the control valve 201 can be installed on the side wall, top wall, and bottom wall of the liquid reservoir, the control valve 201 can also be installed in the wall body of the gas-liquid separator 101, and the control valve 201 can also be installed in the wall body of the liquid reservoir.

[0059] According to some embodiments of the present invention, Figures 1 to 7 As shown, the refrigerant circulation component 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 the gas-liquid separator 101 is arranged in series between the condenser 1031 and the subcooler 1032.

[0060] The operating principle of the refrigerant circulation component 10 may be as follows: the compressor 102 compresses the low-temperature and low-pressure gaseous refrigerant into a 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, and 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 a high-pressure liquid refrigerant, and the subcooler 1032 can cool the refrigerant to a state below 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 refrigerant in the cooling water by supercooling. The flash gas in the throttling process reduces the gasification rate, thereby reducing the liquid vaporization loss; the refrigerant is then transported to the first expansion valve 104, which is used to reduce the pressure of the refrigerant and control the flow of the refrigerant. The refrigerant that passes 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 the surrounding heat, thereby converting the liquid refrigerant into a low-temperature and low-pressure gaseous refrigerant, and finally enters the compressor 102 through the corresponding refrigerant flow channel, thereby completing the refrigerant heat transfer cycle; the first heat exchanger 103 and the second heat exchanger 105 will exchange heat with the water side circulation loop 60.

[0061] According to some embodiments of the present invention, Figures 1 to 7 As shown, the refrigerant circulation component 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; the first heat exchanger 103 includes a condenser 1031, and the gas-liquid separator 101 is arranged in series between the condenser 1031 and the first expansion valve 104.

[0062] The operating principle of the refrigerant circulation component 10 can be: the compressor 102 compresses the low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant, and then the high-temperature and high-pressure gaseous refrigerant enters the condenser 1031 and the gas-liquid separator 101 in sequence through the refrigerant flow channel, and the high-temperature and high-pressure gaseous refrigerant through the supercooler 1032 dissipates heat to the outside, so that the high-temperature and high-pressure gaseous refrigerant becomes a high-pressure liquid refrigerant; then the refrigerant will be 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 the surrounding heat, thereby turning the liquid refrigerant into a low-temperature and low-pressure gaseous refrigerant, and finally enters the compressor 102 through the corresponding refrigerant flow channel, thereby completing the cycle of refrigerant heat transfer; the first heat exchanger 103 and the second heat exchanger 105 will exchange heat with the water side circulation loop 60.

[0063] On the one hand, the gas-liquid separator 101 serves 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 to adjust and supplement the liquid circulation volume of each component in the refrigerant circulation component 10 to adapt to the needs of changes in working conditions; on the other hand, the gas-liquid separator 101 can separate the liquid refrigerant and the gaseous refrigerant, and filter out impurities in the refrigerant flow channel to prevent them from entering the compressor 102, thereby protecting the compressor 102 from damage by liquid hammer.

[0064] In some embodiments, the compressor 102, the first heat exchanger 103, the first expansion valve 104 and the second heat exchanger 105 can be interconnected by separate pipes, and the separate pipes define the refrigerant flow path; or, multiple of the compressor 102, the first heat exchanger 103, the first expansion valve 104 and the second heat exchanger 105 can also be integrated on the refrigerant flow path plate 30 and interconnected through channels in the refrigerant flow path plate 30, and the refrigerant flow path plate 30 defines the refrigerant flow path.

[0065] In some embodiments, a temperature and pressure sensor 109 is provided at both the inlet and outlet of the compressor 102, and the temperature and pressure sensor 109 is used to detect the temperature and pressure at the inlet and outlet of the compressor 102. The detection component 40 in the present application may include the temperature and pressure sensor 109.

[0066] In some embodiments, the vacuum suction assembly 20 is connected to the gas-liquid separator 101 and / or the liquid storage tank. In other embodiments, the vacuum suction assembly 20 can also be directly connected to the compressor 102, the first heat exchanger 103, the second heat exchanger 105 or the refrigerant flow channel between the above components.

[0067] According to some embodiments of the present invention, Figures 2 to 7 As shown, the heat pump system 100 also includes a refrigerant flow channel plate 30, at least part of the vacuum suction module 202 and the gas-liquid separator 101 are installed on the refrigerant flow channel plate 30, and the gas-liquid separator 101 is connected to 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 both installed 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 both installed on the refrigerant flow channel plate 30. In this way, the component integration of the heat pump system 100 can be improved, so that the space occupied by the heat pump system 100 is smaller.

[0068] Furthermore, the control valve 201 and the vacuum tank 2021 may be connected to each other through a separate pipe (eg Figure 2 and Figure 3 Alternatively, the communication channel between the control valve 201 and the vacuum tank 2021 can also be integrated on the flow channel plate to reduce the use of pipes.

[0069] In some embodiments, Figures 2 to 7 As shown, the refrigerant flow channel plate 30 can also be integrally arranged with the compressor 102, that is, the compressor 102 is arranged on the refrigerant flow channel plate 30 and communicated with the refrigerant flow channel plate 30. The first heat exchanger 103 and the second heat exchanger 105 can also be arranged on the refrigerant flow channel plate 30, and communicated with the compressor 102 through the refrigerant flow channel plate 30. The first expansion valve 104 can also be arranged on the refrigerant flow channel plate 30, and communicated with the refrigerant flow channel plate 30. In this way, it is beneficial to improve the component integration of the thermal management system 300.

[0070] According to some embodiments of the present invention, 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 arranged between the vacuum source 2022 and the control valve 201. The vacuum source 2022 is used to suck the vacuum tank 2021 so that the vacuum tank 2021 is in a vacuum state.

[0071] When the refrigerant circulation component 10 is not leaking, the vacuum tank 2021 remains in a vacuum state. For example, when the pressure of the vacuum tank 2021 is higher than the first set value, the vacuum source 2022 sucks the vacuum tank 2021 to reduce the pressure of the vacuum tank 2021 to a second set value, wherein the second set value is less than the first set value. The vacuum tank 2021 has a accommodating cavity to accommodate and store the 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 suck the vacuum tank 2021 to reduce the pressure in the vacuum tank 2021. The vacuum source 2022 can be a separately arranged vacuum pump, or it can be an existing vacuum pump on the vehicle 200.

[0072] 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 in a normally closed state, so that the vacuum source 2022 does not need to continuously suck the vacuum tank 2021; on the other hand, after a leak occurs in the refrigerant circulation component 10, the valve needs to be maintained or switched to a closed state to reduce the possibility of the refrigerant being sucked into the vacuum source 2022 or reduce the amount of refrigerant being sucked into the vacuum source 2022.

[0073] According to some embodiments of the present invention, Figure 8 As shown, the heat pump system 100 further includes a detection component 40, which is used to detect the leakage state of the refrigerant of the refrigerant circulation component 10 or / and the state of collision around the refrigerant circulation component 10. For example, the detection component 40 may include a vibration sensor, which is used to detect the vibration degree around the refrigerant circulation component 10 to obtain the state of collision around the refrigerant circulation component 10; and / or, the detection component 40 may include a pressure sensor, which is used to detect the pressure of the refrigerant circulation component 10 to obtain the leakage state of the refrigerant circulation component 10; and / or, the detection component 40 may include a gas detector, which is used to detect the concentration of the refrigerant around the refrigerant circulation component 10 to obtain the leakage state of the refrigerant circulation component 10.

[0074] That is, the detection component 40 may include one or more of a vibration sensor, a pressure sensor, and a gas detector. In the embodiment where the detection component 40 includes multiple of the vibration sensor, the pressure sensor, and the gas detector, the detection accuracy of the detection component 40 is high, and the refrigerant can be sucked and stored in the vacuum suction module 202 only when leakage occurs.

[0075] In the embodiment where the heat pump system 100 is applied to the vehicle 200, the vibration sensor may be the original vibration sensor on the vehicle 200, and the original vibration sensor on the vehicle 200 is used to detect the collision of the vehicle 200, so that the development cost of the heat pump system 100 of the present application is low. The vibration sensor used to detect the vibration degree around the refrigerant circulation component 10 to obtain the collision state around the refrigerant circulation component 10 may be one or more vibration sensors closest to the refrigerant circulation component 10 on the vehicle 200. When the vibration sensor close to the refrigerant circulation component 10 detects that the vibration degree is greater than the set degree, the refrigerant circulation component 10 is likely to be damaged, resulting in refrigerant leakage.

[0076] The pressure sensor can be an existing pressure sensor in the heat pump system 100 to reduce the production cost of the heat pump system 100 of the embodiment of the utility model. The pressure sensor is used to detect the pressure of the refrigerant circulation component 10 to obtain the leakage status of the refrigerant circulation component 10. Under normal working conditions, the pressure in the refrigerant circulation component 10 is usually high. When the refrigerant circulation component 10 is damaged and the refrigerant leaks, the pressure in the refrigerant circulation component 10 will decrease, deviating from the normal pressure change law in the refrigerant circulation component 10. Therefore, the leakage status of the refrigerant circulation component 10 can be obtained according to the pressure change in the refrigerant circulation component 10.

[0077] The detection component 40 may include a gas detector, which is used to detect the concentration of the refrigerant around the refrigerant circulation component 10 to obtain the leakage status of the refrigerant circulation component 10. When the refrigerant circulation component 10 leaks, the refrigerant concentration around the refrigerant circulation component 10 will increase. Therefore, when the gas detector detects that the refrigerant concentration around the refrigerant circulation component 10 is higher than the set value, it can be known that a refrigerant leakage has occurred in the refrigerant circulation component 10; if the gas detector detects that the refrigerant concentration around the refrigerant circulation component 10 is lower than the set value, it can be known that no refrigerant leakage has occurred in the refrigerant circulation component 10.

[0078] According to some embodiments of the present invention, Figure 1 As shown, the refrigerant circulation component 10 includes a circulation loop 107 and a parallel branch 108, wherein the circulation loop 107 is provided with a compressor 102, a first heat exchanger 103, a first expansion valve 104 and a second heat exchanger 105 in sequence, 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, in other words, the compressor 102 and the second heat exchanger 105 are connected in series and then connected in parallel with the second expansion valve 106; or, the parallel branch 108 is connected in parallel with the inlet end of the compressor 102 and the outlet end of the compressor 102, in other words, the compressor 102 and the second expansion valve 106 are connected in parallel. That is to say, when the refrigerant circulates in the circulation loop 107, part of the refrigerant will enter the parallel branch 108. By adjusting the opening of the first expansion valve 104 and the second expansion valve 106, the operating state of the refrigerant circulation component 10 can be controlled, for example, the refrigerant is controlled to flow mainly in the circulation loop 107; at the same time, the compressor 102 and the second expansion valve 106 are arranged in parallel to reduce the impact of the gaseous refrigerant.

[0079] According to some embodiments of the utility model, the refrigerant in the refrigerant circulation component 10 is propane (R290). Propane as a refrigerant has high thermal conductivity, greater latent heat of evaporation, small molecular weight, good fluidity, lower delivery pressure, small load on the compressor 102, and can extend the service life of the compressor 102. However, propane has the characteristic of combustion and explosion. Compared with the heat pump system 100 using propane as the refrigerant in the related art, the heat pump system 100 of the embodiment of the present application uses propane as the refrigerant. When the refrigerant of the refrigerant circulation component 10 leaks, it is not easy to explode, and the use safety is better.

[0080] In other embodiments, the refrigerant in the refrigerant circulation assembly 10 may also be other refrigerants with flammable and explosive properties.

[0081] like Fig. 9 As shown, the thermal management system 300 according to the embodiment of the utility model includes the heat pump system 100 according to the embodiment of the utility model. Since the heat pump system 100 according to the embodiment of the utility model has the above-mentioned beneficial technical effects, the thermal management system 300 according to the embodiment of the utility model is provided with a vacuum suction component 20, and the vacuum suction component 20 is provided with a control valve 201 and a vacuum suction module 202. When the refrigerant leakage of the refrigerant circulation component 10 is detected or / and the collision occurs around the refrigerant circulation component 10, the control valve 201 will be opened to connect the refrigerant circulation component 10 and the vacuum suction module 202, and the vacuum suction module 202 will suck the refrigerant of the refrigerant circulation component 10 to and store the sucked refrigerant of the refrigerant circulation component 10 in the vacuum suction module 202. The vacuum suction module 202 in the present application can quickly suck the refrigerant. Since the refrigerant is absorbed, the possibility of large-scale leakage of the refrigerant into the surrounding environment of the thermal management system 300 can be reduced, and potential fire points can be isolated. Therefore, the possibility of combustion and explosion of the thermal management system 300 of the present application is reduced, the risk of fire is reduced, and the safety of use of the thermal management system 300 is improved.

[0082] like Fig. 9As shown, the vehicle 200 according to the embodiment of the utility model includes the thermal management system 300 according to the embodiment of the utility model. Since the thermal management system 300 according to the embodiment of the utility model has the above-mentioned beneficial technical effects, the vehicle 200 according to the embodiment of the utility model is provided with a vacuum suction component 20, and the vacuum suction component 20 is provided with a control valve 201 and a vacuum suction module 202. When the refrigerant leakage of the refrigerant circulation component 10 is detected or / and the collision occurs around the refrigerant circulation component 10, the control valve 201 will be opened to make the refrigerant circulation component 10 and the vacuum suction module 202 communicate, and the vacuum suction module 202 will suck the refrigerant of the refrigerant circulation component 10 and store the sucked refrigerant of the refrigerant circulation component 10 in the vacuum suction module 202. The vacuum suction module 202 in the present application can quickly suck the refrigerant. Since the refrigerant is absorbed, the possibility of large-scale leakage of the refrigerant into the surrounding environment of the thermal management system 300 can be reduced, and potential fire points can be isolated. Therefore, the possibility of combustion and explosion of the thermal management system 300 of the present application is reduced, the risk of fire is reduced, and the safety of use of the thermal management system 300 is improved.

[0083] Among them, 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 both the internal combustion engine and the motor as the main driving force. Regarding the internal combustion engine and the motor mentioned in the above embodiments that provide driving power for the new energy vehicle, the internal combustion engine can use gasoline, diesel, hydrogen, etc. as fuel, and the way to provide electrical energy to the motor can use power batteries, hydrogen fuel cells, etc., which are not specifically limited here. It should be noted that this is only an exemplary description of the structure of new energy vehicles, etc., and it does not limit the scope of protection of the utility model.

[0084] Other structures and operations of the thermal management system 300 and the vehicle 200 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.

[0085] According to the control method of the heat pump system of the embodiment of the utility model, the heat pump system 100 based on the embodiment of the utility model includes: when a leakage of the refrigerant circulation component 10 is detected or a collision is detected around the refrigerant circulation component 10, the control valve 201 is controlled to connect the vacuum suction module 202 and the refrigerant circulation component 10, so that the refrigerant of the refrigerant circulation component 10 is sucked and stored in the vacuum suction module 202.

[0086] When leakage of the refrigerant circulation component 10 is detected or collision is detected around the refrigerant circulation component 10, the control valve 201 is controlled to connect the vacuum suction module 202 and the refrigerant circulation component 10. Here, the control valve 201 can be controlled to be connected when leakage of the refrigerant circulation component 10 is detected or collision is detected around the refrigerant circulation component 10; or, the control valve 201 can be controlled to be connected after leakage of the refrigerant circulation component 10 is detected and a delay of a period of time or collision is detected and a delay of a period of time. It should be noted that the period of time here is usually very short, for example, less than 1s.

[0087] According to the control method of the thermal management system of the embodiment of the utility model, when the refrigerant in the refrigerant circulation component 10 leaks or has a high probability of leaking, the vacuum suction module 202 is controlled to suck the refrigerant in the refrigerant circulation component 10 and store the sucked refrigerant in the vacuum suction module 202, thereby reducing the possibility of large-scale leakage of refrigerant into the external environment. As a result, the possibility of combustion and explosion of the thermal management system 300 of the present application is reduced, the risk of fire is reduced, and the safety of use of the thermal management system 300 is improved.

[0088] According to some embodiments of the present invention, when the vacuum suction module 202 sucks the refrigerant in the refrigerant circulation component 10 for a set time, the control valve 201 is controlled to disconnect the vacuum suction module 202 from the refrigerant circulation component 10 .

[0089] When the vacuum suction module 202 has been sucking the refrigerant in the refrigerant circulation component 10 for a set time, most of the refrigerant in the refrigerant circulation component 10 has been sucked into the vacuum suction module 202. The specific value of the first set time can be reasonably selected based on 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 in the vacuum degree of the vacuum suction module 202 after the vacuum suction module 202 sucks the refrigerant, etc.

[0090] When the vacuum suction module 202 has been sucking the refrigerant in the refrigerant circulation component 10 for a set period of time, the control valve 201 disconnects the vacuum suction module 202 from the refrigerant circulation component 10, thereby reducing the possibility of the refrigerant in the vacuum suction module 202 flowing back into the refrigerant circulation component 10.

[0091] According to some embodiments of the present invention, the control method of the thermal management system further includes: controlling the expansion valve of the refrigerant circulation component 10 to switch to a fully open state when a leak of the refrigerant circulation component 10 is detected or a collision is detected around the refrigerant circulation component 10. Here, the expansion valve of the refrigerant circulation component 10 may be the first expansion valve 104, or the expansion valve of the refrigerant circulation component 10 may be the second expansion valve 106, or the expansion valve of the refrigerant circulation component 10 may be the first expansion valve 104 and the second expansion valve 106.

[0092] When leakage of the refrigerant circulation component 10 is detected or collision is detected around the refrigerant circulation component 10, the expansion valve of the refrigerant circulation component 10 is controlled to switch to a fully open state. That is to say, at this time, the flow area of ​​the refrigerant circulation component 10 reaches a 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 and being sucked into the vacuum suction module 202.

[0093] According to some embodiments of the present invention, after the control valve 201 disconnects the vacuum suction module 202 from the refrigerant circulation component 10, that is, after the vacuum suction module 202 stops suctioning the refrigerant circulation component 10, the expansion valve of the refrigerant circulation component 10 is controlled to be closed. Here, controlling the expansion valve of the refrigerant circulation component 10 to be closed may be controlling the first expansion valve 104 and the second expansion valve 106 to be closed simultaneously.

[0094] This includes, when the control valve 201 disconnects the vacuum suction module 202 from the refrigerant circulation component 10, controlling the expansion valve of the refrigerant circulation component 10 to close; or, after the control valve 201 disconnects the vacuum suction module 202 from the refrigerant circulation component 10 for a period of time, controlling the expansion valve of the refrigerant circulation component 10 to close. When the refrigerant leakage point is located at certain positions on the refrigerant circulation component 10, for example, when it is located at the refrigerant flow path between the second heat exchanger 105 and the compressor 102, closing the expansion valve in the circulation loop 107 is conducive to retaining a small amount of unsucked refrigerant in the circulation loop 107, and it is not easy to leak from the leakage point to the external environment, so it is conducive to further reducing the leakage of refrigerant.

[0095] A heat pump system 100 and a control method of the heat pump system according to a specific embodiment of the present invention are described in detail below with reference to the accompanying drawings. It is worth noting that the following description is only an exemplary description and cannot be construed as a limitation to the present invention.

[0096] like Figures 1 to 9 As shown, the heat pump system 100 is applied to a vehicle 200 , and includes a refrigerant circulation component 10 and a vacuum suction component 20 .

[0097] The refrigerant circulation component 10 includes a circulation loop 107 and a parallel branch 108. The circulation loop 107 is provided with a compressor 102, a first heat exchanger 103, a first expansion valve 104 and a second heat exchanger 105 in sequence. 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.

[0098] The first heat exchanger 103 includes a condenser 1031 and a subcooler 1032 which are arranged in series, and the gas-liquid separator 101 is arranged in series between the condenser 1031 and the subcooler 1032 .

[0099] The vacuum suction assembly 20 is connected to the bottom of the gas-liquid separator 101. 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 of the refrigerant circulation assembly 10 and the vacuum suction module 202. The heat pump system 100 further includes a detection assembly 40, which is used to detect the leakage state of the refrigerant of the refrigerant circulation assembly 10 and the state of collision around the refrigerant circulation assembly 10.

[0100] The detection component 40 includes a vibration sensor, which is used to detect the vibration degree around the refrigerant circulation component 10 to obtain the collision status around the refrigerant circulation component 10; the detection component 40 includes a pressure sensor, which is used to detect the pressure of the refrigerant circulation component 10 to obtain the leakage status of the refrigerant circulation component 10; the detection component 40 includes a gas detector, which is used to detect the concentration of the refrigerant around the refrigerant circulation component 10 to obtain the leakage status of the refrigerant circulation component 10.

[0101] The vacuum suction component 20 is used to suck the refrigerant of the refrigerant circulation component 10 and store the sucked refrigerant of the refrigerant circulation component 10 in the vacuum suction module 202 when a refrigerant leakage of the refrigerant circulation component 10 is detected or / and a collision occurs around the refrigerant circulation component 10.

[0102] The vacuum suction module 202 includes a vacuum tank 2021 and a vacuum source 2022. The vacuum tank 2021 is disposed between the vacuum source 2022 and the control valve 201. The vacuum source 2022 is used to suck the vacuum tank 2021 to put the vacuum tank 2021 in a vacuum state. The refrigerant in the refrigerant circulation assembly 10 is propane.

[0103] The refrigerant circulation component 10 also includes a refrigerant flow 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 vacuum tank 2021 are all installed on the refrigerant flow 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 are connected to the refrigerant flow plate 30.

[0104] The control method of the thermal management system includes: when a leak of the refrigerant circulation component 10 is detected or a collision is detected around the refrigerant circulation component 10, controlling the control valve 201 to conduct the vacuum suction module 202 and the refrigerant circulation component 10, so that the refrigerant of the refrigerant circulation component 10 is sucked and stored in the vacuum suction module 202, and at the same time controlling the expansion valve of the refrigerant circulation component 10 to switch to a fully open state;

[0105] When the vacuum suction module 202 sucks the refrigerant in the refrigerant circulation component 10 for a set period of time, the control valve 201 is controlled to disconnect the vacuum suction module 202 and the refrigerant circulation component 10. After the control valve 201 disconnects the vacuum suction module 202 and the refrigerant circulation component 10, the expansion valve of the refrigerant circulation component 10 is controlled to be closed.

[0106] The heat pump system 100 of this embodiment, the vacuum source 2022 can be the original vacuum source of the vehicle, and only the control valve 201 and the vacuum tank 2021 need to be set, which will not increase the complexity and cost of the heat pump system 100 too much, and the structure is simple and easy to implement. The detection component 40 can monitor the concentration of the refrigerant of the refrigerant circulation component 10 and the collision signal of the vehicle body 200 in real time. When the refrigerant leaks, the refrigerant of the refrigerant circulation component 10 is quickly absorbed and sealed to avoid harm to the environment and human health. At the same time, it can effectively isolate potential fire points, effectively prevent the leakage of refrigerant and the spread of fire, thereby improving fire safety, greatly avoiding the possibility of fire and explosion, and can improve the safety of drivers and passengers. The safety of the vehicle 200 itself is also guaranteed, and it has strong adaptability.

[0107] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0108] In the description of this specification, the description with reference to the terms "embodiment", "specific embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation 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.

[0109] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A heat pump system, characterized in that: include: Refrigerant circulation components; A vacuum suction component, the vacuum suction component is connected to the refrigerant circulation component, the vacuum suction component includes a control valve and a vacuum suction module, the control valve is arranged in series between the refrigerant circulation component and the vacuum suction module and is used to control the on-off of the refrigerant circulation component and the vacuum suction module, the vacuum suction component is used to suck the refrigerant of the refrigerant circulation component and store the sucked refrigerant of the refrigerant circulation component in the vacuum suction module when a refrigerant leakage of the refrigerant circulation component is detected or / and a collision occurs around the refrigerant circulation component.

2. The heat pump system according to claim 1, characterized in that: The vacuum suction module includes a vacuum tank and a vacuum source. The vacuum tank is arranged between the vacuum source and the control valve. The vacuum source is used to suck the vacuum tank so that the vacuum tank is in a vacuum state.

3. The heat pump system according to claim 1, characterized in that: It also includes a detection component, which is used to detect the leakage state of the refrigerant of the refrigerant circulation component and / or the collision state around the refrigerant circulation component.

4. The heat pump system according to claim 3, characterized in that: The detection component includes a vibration sensor, which is used to detect the vibration degree around the refrigerant circulation component to obtain the collision status around the refrigerant circulation component; and / or, the detection component includes a pressure sensor, which is used to detect the pressure of the refrigerant circulation component to obtain the leakage status of the refrigerant circulation component; and / or, the detection component includes a gas detector, which is used to detect the concentration of the refrigerant around the refrigerant circulation component to obtain the leakage status of the refrigerant circulation component.

5. The heat pump system according to claim 1, characterized in that: The refrigerant circulation component is provided with a gas-liquid separator and / or a liquid reservoir, and the vacuum suction component is connected to the gas-liquid separator and / or the liquid reservoir.

6. The heat pump system according to claim 5, characterized in that: The vacuum suction assembly is communicated with the bottom of the gas-liquid separator and / or the bottom of the liquid reservoir.

7. The heat pump system according to claim 5, characterized in that: The refrigerant circulation component is provided with a compressor, a first heat exchanger, a first expansion valve and a second heat exchanger in sequence; wherein, the first heat exchanger includes 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 includes a condenser, and the gas-liquid separator is arranged in series between the condenser and the first expansion valve.

8. The heat pump system according to any one of claims 5 to 7, characterized in that: It also includes a refrigerant flow channel plate, at least part of the vacuum suction module and the gas-liquid separator are installed on the refrigerant flow channel plate, and the gas-liquid separator is connected to the refrigerant flow channel plate.

9. The heat pump system according to claim 1, characterized in that: The refrigerant circulation component includes a circulation loop and a parallel branch, the circulation loop is provided with a compressor, a first heat exchanger, a first expansion valve and a second heat exchanger in sequence, 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 according to claim 1, characterized in that: The refrigerant in the refrigerant circulation component is propane.

11. A thermal management system, characterized in that: Comprising a heat pump system according to any one of claims 1-10.

12. A vehicle, characterized in that: Comprising a thermal management system according to claim 11.

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