Heat pump system, vehicle, refrigerant amount control method and device and storage medium

Abstract

The invention discloses a heat pump system, a vehicle, a refrigerant amount control method and device and a storage medium, and belongs to the technical field of vehicle heat pump system management. The heat pump system comprises a compressor; the heat exchange module comprises a high-pressure cavity and a low-pressure cavity which are integrally arranged, the inlet end of the high-pressure cavity is connected with an outlet of the compressor and used for allowing high-pressure refrigerants to flow in and flow out and storing the refrigerants, a drying and filtering part is arranged in the high-pressure cavity, the outlet end of the low-pressure cavity is connected with an inlet of the compressor, and the outlet end of the low-pressure cavity is connected with an outlet of the compressor. A low-pressure refrigerant flows in and out and gas-liquid separation of the refrigerant is carried out on the low-pressure refrigerant; and the control module is used for controlling the high-pressure refrigerant to selectively flow through the drying and filtering part and the high-pressure cavity. The heat exchange module formed by integrating the high-pressure cavity and the low-pressure cavity can achieve heat exchange between a refrigerant flowing in the high-pressure cavity and a refrigerant flowing in the low-pressure cavity, and the structure of the heat pump system is simplified.

Description

Technical Field

[0001] The present application belongs to the technical field of vehicle heat pump system management, and in particular, relates to a heat pump system, a vehicle, a refrigerant quantity control method, a device and a storage medium. Background Art

[0002] The heat pump system is a device that transfers heat energy from a low-temperature heat source to a high-temperature heat source to achieve cooling and heating. It is widely used in the vehicle industry. It is usually necessary to set a high-pressure liquid storage tank at the outlet of the compressor and a low-pressure gas-liquid separator at the inlet of the compressor. This requires the refrigerant superheat at the inlet and outlet of the compressor to be controlled separately. This not only has high control complexity, but also high energy consumption and low system efficiency. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a heat pump system, a vehicle, a refrigerant quantity control method, a device and a storage medium, wherein a heat exchange module is used to perform heat exchange between a high-pressure refrigerant and a low-pressure refrigerant, and a control module is used to adjust the flow direction and flow rate of the refrigerant so that the heat exchange module switches between different modes to adapt to different working modes of the heat pump system, thereby reducing the energy consumption of the entire heat pump system, improving the operating efficiency of the heat pump system, extending the service life of the compressor, simplifying the structure of the heat pump system, reducing the number of components in the heat pump system, improving the aesthetics of the heat pump system arranged on the vehicle body, and reducing the development cost of the heat pump system.

[0004] In a first aspect, the present application provides a heat pump system, comprising:

[0005] compressor;

[0006] a first condenser, wherein a first end of the first condenser is connected to an outlet end of the compressor;

[0007] Heat exchanger;

[0008] A heat exchange module, the heat exchange module comprises an integrated high-pressure chamber and a low-pressure chamber, the inlet end of the high-pressure chamber is connected to the outlet of the compressor, and is used for the inflow and outflow of high-pressure refrigerant and the storage of the refrigerant, and a drying and filtering part is arranged in the high-pressure chamber, and the outlet end of the low-pressure chamber is connected to the inlet of the compressor, and is used for the inflow and outflow of low-pressure refrigerant and the gas-liquid separation of the refrigerant;

[0009] The control module is used to control the high-pressure refrigerant to selectively flow through the drying filter part and the high-pressure chamber.

[0010] According to the heat pump system of the present application, the heat exchange module formed by the integrated high-pressure chamber and the low-pressure chamber can not only realize the heat exchange between the refrigerant flowing in the high-pressure chamber and the refrigerant flowing in the low-pressure chamber, but also reduce the superheat of the refrigerant controlling the inlet and outlet of the compressor, reduce the energy consumption of the entire heat pump system, improve the operating efficiency of the heat pump system, and extend the service life of the compressor, but also simplify the structure of the heat pump system, reduce the number of parts in the heat pump system, improve the aesthetics of the heat pump system arranged on the vehicle body, and reduce the development cost of the heat pump system. In addition, by switching the mode executed by the heat exchange module through the control module, it can dynamically adjust the flow direction and flow rate of the refrigerant, thereby further reducing energy consumption and improving operating efficiency.

[0011] According to one embodiment of the present application, the heat exchange module has a first state and a second state:

[0012] a first state, in which the high-pressure refrigerant flowing into the high-pressure chamber flows through the drying and filtering part, the high-pressure chamber stores and flows out the high-pressure refrigerant, and the low-pressure chamber flows in and flows out the low-pressure refrigerant;

[0013] a second state, in which the high-pressure refrigerant flowing into the high-pressure chamber does not flow through the drying filter portion, the high-pressure chamber stores and flows out the high-pressure refrigerant, and the low-pressure chamber flows in and flows out the low-pressure refrigerant;

[0014] According to one embodiment of the present application, the heat exchange module has a third state, in which the high-pressure refrigerant does not flow into the high-pressure chamber, and only flows out the high-pressure refrigerant, and the low-pressure refrigerant flows into and flows out of the low-pressure chamber;

[0015] According to an embodiment of the present application, the heat exchange module has a fourth state. In the fourth state, the high-pressure refrigerant neither flows in nor out of the high-pressure chamber, and the low-pressure refrigerant flows in and out of the low-pressure chamber.

[0016] According to one embodiment of the present application, the heat pump system further includes an evaporator and a battery pack temperature control unit, which are respectively connected to the outlet end of the high-pressure chamber and the inlet end of the low-pressure chamber;

[0017] The heat pump system has a passenger compartment single cooling mode and a battery pack single cooling mode. In the passenger compartment single cooling mode or the battery pack single cooling mode, one of the evaporator and the battery pack temperature control unit works accordingly, and the heat exchange module switches back and forth between the first state and the second state.

[0018] According to an embodiment of the present application, the heat pump system has a refrigeration shutdown mode. In the refrigeration shutdown mode, the heat exchange module selectively executes the first state, the fourth state and the third state in sequence.

[0019] According to an embodiment of the present application, the heat pump system has a heating shutdown mode. In the heating shutdown mode, the heat exchange module sequentially executes the first state and the fourth state.

[0020] In a second aspect, the present application provides a vehicle, comprising a vehicle body and the heat pump system as described above, wherein the heat pump system is arranged on the vehicle body.

[0021] According to the vehicle of the present application, heat is exchanged between high-pressure refrigerant and low-pressure refrigerant through the heat exchange module in the heat pump system, and the control module in the heat pump system adjusts the flow direction and flow rate of the refrigerant to enable the heat exchange module to switch between different modes to adapt to different working modes of the heat pump system, thereby reducing the energy consumption of the entire heat pump system, improving the operating efficiency of the heat pump system, extending the service life of the compressor, simplifying the structure of the heat pump system, reducing the number of components in the heat pump system, improving the aesthetics of the heat pump system arranged on the vehicle body, and reducing the development cost of the heat pump system.

[0022] In a third aspect, the present application provides a method for controlling the amount of refrigerant in a heat pump system. Based on the heat pump system as described above, the method for controlling the amount of refrigerant in the heat pump system includes:

[0023] receiving a target operation instruction, wherein the target operation instruction is used to instruct the heat pump system to enter a target operation mode;

[0024] According to the pre-established correspondence between the working mode and the operation mode, the heat pump system is placed in a target operation mode, wherein the heat pump system is placed in the target operation mode includes:

[0025] The compressor operates at a target speed;

[0026] The control module is used to make the heat exchange module execute a first state, wherein the first state refers to that the high-pressure refrigerant flowing into the high-pressure chamber from the compressor flows through the drying filter part, and at least part of the refrigerant is stored in the high-pressure chamber, and the low-pressure refrigerant flows out of the low-pressure chamber to the compressor.

[0027] According to the refrigerant quantity control method of the heat pump system of the present application, no matter the working mode is single-open cooling mode or heating shutdown mode, by making the heat exchange module execute the first state, not only the energy consumption can be reduced, but also the operation efficiency of the heat pump system can be effectively improved.

[0028] According to one embodiment of the present application, when the target operating mode is the passenger compartment single cooling mode or the battery pack single cooling mode, after the heat pump system is in the target operating mode, the further comprising:

[0029] Get the current system compression ratio;

[0030] If the current system compression ratio is not greater than the preset compression ratio, the control module is used to make the heat exchange module execute the second state, wherein the second state means that the high-pressure refrigerant flowing into the high-pressure chamber does not flow through the drying filter part;

[0031] The compressor speed and expansion valve opening are updated in real time until a refrigeration stop instruction is received.

[0032] According to one embodiment of the present application, the real-time updating of the compressor speed and the expansion valve opening further includes:

[0033] Obtain the current system compression ratio and current superheat in real time;

[0034] The relationship between the current system compression ratio and the preset compression ratio, as well as the relationship between the current superheat and the preset superheat are determined in real time; if the system compression ratio is greater than the preset compression ratio, and the current superheat is less than the preset superheat, the heat exchange module is caused to execute the first state through the control module.

[0035] According to an embodiment of the present application, the real-time determination of the magnitude relationship between the system compression ratio and the preset compression ratio, and the magnitude relationship between the current superheat and the preset superheat, further includes:

[0036] If the system compression ratio is not greater than the preset compression ratio, or the current superheat is not less than the preset superheat, the heat exchange module continues to execute the second state.

[0037] According to one embodiment of the present application, the method of receiving a refrigeration stop instruction further includes:

[0038] Get current environment information;

[0039] If the current environmental information meets the oil return condition, the control module is used to sequentially execute the first state and the fourth state of the heat exchange module, and the compressor is stopped. The fourth state means that after the high-pressure chamber stores a preset amount of refrigerant, the refrigerant does not flow into or out of the high-pressure chamber;

[0040] The control module is used to make the heat exchange module execute a third state, wherein the third state means that after a preset amount of refrigerant is stored in the high-pressure chamber, only the refrigerant flows out of the high-pressure chamber.

[0041] According to one embodiment of the present application, when the target operating mode is the heating shutdown mode, after the heat pump system is in the target operating mode, the method further includes:

[0042] Obtaining inlet information of the compressor;

[0043] If the inlet information meets the preset conditions, the control module enables the heat exchange module to execute the fourth state, and the fourth state means that after the high-pressure chamber stores a preset amount of refrigerant, the refrigerant does not flow in or out of the high-pressure chamber.

[0044] According to an embodiment of the present application, if the entry information satisfies a preset condition, the method further includes:

[0045] The compressor is stopped, and the evaporator expansion valve and the battery pack expansion valve are adjusted to corresponding maximum openings.

[0046] In a fourth aspect, the present application provides a refrigerant quantity control device for a heat pump system, the refrigerant quantity control device for the heat pump system comprising:

[0047] A receiving module, used for receiving a target working instruction, wherein the target working instruction is used for instructing the heat pump system to enter a target working mode;

[0048] The working module is used to make the heat pump system in a target operating mode according to the pre-established correspondence between the working mode and the operating mode, wherein the heat pump system in the target operating mode includes:

[0049] The compressor runs at the target speed;

[0050] The heat exchange module is controlled by the module to execute the first state, wherein the high-pressure refrigerant flowing into the high-pressure chamber from the compressor flows through the drying filter part, and at least part of the refrigerant is stored in the high-pressure chamber, and the low-pressure refrigerant flows out of the low-pressure chamber to the compressor.

[0051] According to the refrigerant quantity control device of the heat pump system of the present application, through the above-mentioned refrigerant quantity control method of the heat pump system, no matter the working mode is the single-open cooling mode or the heating shutdown mode, by making the heat exchange module execute the first state, not only the energy consumption can be reduced, but also the operating efficiency of the heat pump system can be effectively improved, and the economy of the use of the heat pump system can be improved.

[0052] In a fifth aspect, the present application provides a storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the method for controlling the amount of refrigerant in a heat pump system as described in the third aspect above is implemented.

[0053] In a sixth aspect, the present application provides a chip, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the refrigerant quantity control method of the heat pump system as described in the third aspect.

[0054] In a seventh aspect, the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the refrigerant quantity control method for a heat pump system as described in the third aspect above.

[0055] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0057] Figure 1 is an architectural diagram of a heat pump system provided in an embodiment of the present application;

[0058] Figure 2 is a flow chart of a refrigerant quantity control method for a heat pump system provided in an embodiment of the present application;

[0059] Figure 3 It is a flow chart of a refrigerant quantity control method of a heat pump system in a single-opening cooling mode provided in an embodiment of the present application;

[0060] Figure 4 It is a flow chart of a refrigerant quantity control method of a heat pump system in a heating shutdown mode provided in an embodiment of the present application;

[0061] Figure 5 It is a structural schematic diagram of a refrigerant quantity control device for a heat pump system provided in an embodiment of the present application.

[0062] Reference numerals:

[0063] 101, first solenoid valve; 102, second solenoid valve; 103, evaporator expansion valve; 104, third solenoid valve; 105, battery pack expansion valve; 106, throttle valve; 107, fourth solenoid valve; 108, transition expansion valve; 109, fifth solenoid valve;

[0064] 110. compressor; 120. heat exchange module; 121. high-pressure chamber; 1211. drying and filtering part; 122. low-pressure chamber; 130. first condenser; 150. evaporator; 160. battery pack. DETAILED DESCRIPTION

[0065] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0066] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0067] In conjunction with the accompanying drawings, the heat pump system, the refrigerant quantity control method of the heat pump system, the refrigerant quantity control device 400 of the heat pump system and the readable storage medium provided in the embodiments of the present application are described in detail through specific embodiments and their application scenarios.

[0068] like Figure 1 As shown, an embodiment of the present application provides a heat pump system, which includes a compressor 110, a heat exchange module 120 and a control module (not shown).

[0069] The compressor 110 is used to compress low-pressure refrigerant into high-pressure refrigerant and discharge it.

[0070] It can be understood that low-pressure and low-temperature gaseous refrigerant flows into the inlet of the compressor 110, and high-pressure and high-temperature gaseous refrigerant flows out of the outlet of the compressor 110, thereby providing power for the circulation of the refrigerant in the entire heat pump system.

[0071] The heat exchange module 120 includes an integrated high-pressure chamber 121 and a low-pressure chamber 122. The high-pressure chamber 121 is used for the inflow and outflow of high-pressure refrigerant and for storing refrigerant. A drying filter part 1211 is provided in the high-pressure chamber 121. The low-pressure chamber 122 is connected to the compressor 110 and is used for the inflow and outflow of low-pressure refrigerant.

[0072] The heat exchange module 120 includes an integrated high-pressure chamber 121 and a low-pressure chamber 122. The inlet end of the high-pressure chamber 121 is connected to the outlet of the compressor 110, and is used for the inflow and outflow of high-pressure refrigerant and the storage of refrigerant. A drying filter 1211 is provided in the high-pressure chamber 121, and the outlet end of the low-pressure chamber 122 is connected to the inlet of the compressor 110, and is used for the inflow and outflow of low-pressure refrigerant and the gas-liquid separation of the refrigerant.

[0073] It should be noted that by storing refrigerant in the high-pressure chamber 121, excess refrigerant can be stored in time to reduce the amount of refrigerant participating in the heat pump system or release refrigerant to increase the amount of refrigerant participating in the system, so as to reduce the energy consumption of the heat pump system. By setting the drying and filtering part 1211, the refrigerant flowing into the high-pressure chamber 121 can be dried and filtered, thereby extending the service life of the entire heat pump system.

[0074] It can be understood that the high-pressure chamber 121 is connected to the outlet end of the compressor 110, and the low-pressure chamber 122 is connected to the inlet end of the compressor 110. Since the high-pressure chamber 121 and the low-pressure chamber 122 are integrated, not only can the refrigerant in the high-pressure chamber 121 and the refrigerant in the low-pressure chamber 122 be heat exchanged, the overheating of the refrigerant controlling the inlet and outlet of the compressor 110 is reduced, the energy consumption of the entire heat pump system is reduced, the operating efficiency of the heat pump system is improved, and the service life of the compressor 110 is extended, but also the structure of the heat pump system can be simplified, the number of components in the heat pump system can be reduced, the aesthetics of the heat pump system arranged on the vehicle body can be improved, and the development cost of the heat pump system can be reduced.

[0075] The control module is used to control the high-pressure refrigerant to selectively flow through the drying filter portion 1211 and the high-pressure chamber 121 .

[0076] It is understandable that by controlling whether the refrigerant flows through the drying filter section 1211, the resistance generated when all the refrigerant needs to flow through the drying filter section 1211 can be reduced, thereby improving the operating efficiency of the system.

[0077] In this embodiment, the control module is also used to control the flow rate of the high-pressure refrigerant flowing out of the high-pressure chamber 121 .

[0078] In this embodiment, the control module is located in the high-pressure chamber 121 to facilitate control while improving space utilization.

[0079] It should be noted that the heat exchange module 120 can be made to execute four states respectively through the control module:

[0080] In the first state, the high-pressure refrigerant flowing into the high-pressure chamber 121 flows through the drying and filtering part 1211, the high-pressure chamber 121 stores and flows out the high-pressure refrigerant, and the low-pressure refrigerant flows into and flows out of the low-pressure chamber 122;

[0081] It can be understood that the high-pressure refrigerant flows in and passes through the drying and filtering part 1211 for drying and filtering before flowing into the high-pressure chamber 121. At the same time, the high-pressure refrigerant flows out of the high-pressure chamber 121, and the low-pressure refrigerant flows into the low-pressure chamber 122 and flows out. At the same time, the high-pressure refrigerant flowing in the high-pressure chamber 121 and the low-pressure refrigerant flowing in the low-pressure chamber 122 perform heat exchange.

[0082] In the second state, the high-pressure refrigerant flowing into the high-pressure chamber 121 does not flow through the drying filter 1211 , the high-pressure chamber 121 stores and flows out the high-pressure refrigerant, and the low-pressure chamber 122 flows in and flows out the low-pressure refrigerant.

[0083] It can be understood that the high-pressure refrigerant flows into the high-pressure chamber 121 and flows out without passing through the drying and filtering part 1211, and the low-pressure refrigerant flows into the low-pressure chamber 122 and flows out, and at the same time, the high-pressure refrigerant flowing in the high-pressure chamber 121 and the low-pressure refrigerant flowing in the low-pressure chamber 122 perform heat exchange;

[0084] In the third state, the high-pressure refrigerant does not flow into the high-pressure chamber 121, and the high-pressure refrigerant flows out of the high-pressure chamber 121, and the low-pressure refrigerant flows into and flows out of the low-pressure chamber 122;

[0085] It can be understood that the high-pressure refrigerant does not flow through the high-pressure chamber 121, and at the same time the high-pressure refrigerant flows out of the high-pressure chamber 121, and the low-pressure refrigerant flows into the low-pressure chamber 122 and flows out, and the high-pressure refrigerant stored in the high-pressure chamber 121 and the low-pressure refrigerant flowing in the low-pressure chamber 122 perform heat exchange;

[0086] In the fourth state, high-pressure refrigerant neither flows into nor flows out of the high-pressure chamber 121 , and low-pressure refrigerant flows into and flows out of the low-pressure chamber 122 .

[0087] It is understandable that the high-pressure chamber 121 seals the refrigerant, that is, the high-pressure refrigerant neither flows into nor flows out of the high-pressure chamber 121, the low-pressure refrigerant flows into and flows out of the low-pressure chamber 122, and the high-pressure refrigerant stored in the high-pressure chamber 121 and the low-pressure refrigerant flowing in the low-pressure chamber 122 perform heat exchange. It should be noted that the refrigerant neither flows in nor flows out includes two types: the actual minimum flow rate of the refrigerant flowing in and out required to ensure that the compressor 110 does not run idle, and the refrigerant flow rate is zero.

[0088] In this embodiment, the control module includes a control valve, that is, the flow direction and flow rate of the refrigerant are changed by the control valve. It is understandable that controlling the flow direction and flow rate of the refrigerant by the control valve is a common technical means of personnel in this field, and will not be specifically described here. Of course, in some embodiments, other means can also be used to achieve the change of the flow direction and flow rate of the refrigerant, and this embodiment does not make specific restrictions.

[0089] It is understandable that the heat exchange module 120 formed by the integrated high-pressure chamber 121 and the low-pressure chamber 122 can not only realize the heat exchange between the refrigerant flowing in the high-pressure chamber 121 and the refrigerant flowing in the low-pressure chamber 122, but also reduce the refrigerant superheat of the inlet and outlet of the compressor 110, reduce the energy consumption of the entire heat pump system, improve the operating efficiency of the heat pump system, and extend the service life of the compressor 110, but also simplify the structure of the heat pump system, reduce the number of parts in the heat pump system, improve the aesthetics of the heat pump system arranged on the vehicle body, and reduce the development cost of the heat pump system. In addition, by switching the mode executed by the control module 120, it can dynamically adjust the flow direction and flow rate of the refrigerant, thereby further reducing energy consumption and improving operating efficiency.

[0090] According to the heat pump system provided in the embodiment of the present application, heat exchange is performed between high-pressure refrigerant and low-pressure refrigerant through the heat exchange module 120, and the control module adjusts the flow direction and flow rate of the refrigerant so that the heat exchange module 120 switches between different modes to adapt to different working modes of the heat pump system, thereby reducing the energy consumption of the entire heat pump system, improving the operating efficiency of the heat pump system, extending the service life of the compressor 110, simplifying the structure of the heat pump system, reducing the number of components in the heat pump system, improving the aesthetics of the heat pump system arranged on the vehicle body, and reducing the development cost of the heat pump system.

[0091] In this embodiment, in order to realize the circulation flow of the refrigerant, the heat pump system includes a compressor 110, a first condenser 130 heat exchanger, a heat exchange module 120 and a control module. The first end of the first condenser 130 is connected to the outlet end of the compressor 110; the heat exchange module 120 includes an integrated high-pressure chamber 121 and a low-pressure chamber 122, the inlet end of the high-pressure chamber 121 is connected to the second end of the first condenser 130, the outlet end of the high-pressure chamber 121 is connected to the first end of the heat exchanger, and a drying filter part 1211 is arranged in the high-pressure chamber 121, the inlet end of the low-pressure chamber 122 is connected to the second end of the heat exchanger, and the outlet end of the low-pressure chamber 122 is connected to the inlet end of the compressor 110; the control module is used to control the high-pressure refrigerant to selectively flow through the drying filter part 1211 and the high-pressure chamber 121.

[0092] It should be noted that the heat exchanger includes but is not limited to the evaporator 150, the battery pack temperature control unit 160, the heat exchanger, the radiator and the second condenser.

[0093] In this embodiment, the high-pressure chamber 121 is placed in the low-pressure chamber 122, thereby fully realizing the heat exchange between the high-pressure refrigerant and the low-pressure refrigerant, further improving the space utilization of the heat pump system.

[0094] In some embodiments, a first solenoid valve 101 is disposed between the outlet end of the high-pressure chamber 121 and the inlet end of the low-pressure chamber 122 to control the on-off of the refrigerant.

[0095] In some embodiments, the heat pump system further includes a first condenser 130 , which is connected to the compressor 110 and the high-pressure chamber 121 , respectively, and is used to cool the high-pressure refrigerant.

[0096] It can be understood that the first condenser 130 converts the high-pressure and high-temperature gaseous refrigerant output by the compressor 110 into a high-pressure, medium-temperature liquid refrigerant, and the high-pressure chamber 121 flows with the high-pressure, medium-temperature liquid refrigerant, which not only reduces the outlet temperature of the compressor 110, but also facilitates the high-pressure chamber 121 to store liquid refrigerant.

[0097] In this embodiment, a second solenoid valve 102 is provided between the first condenser 130 and the outlet end of the compressor 110 , for controlling the on-off flow of the refrigerant from the compressor 110 to the first condenser 130 .

[0098] In some embodiments, the heat pump system also includes an evaporator 150, which is connected to the outlet end of the high-pressure chamber 121 through an evaporator expansion valve 103. The evaporator expansion valve 103 is used to convert the high-pressure refrigerant into a low-pressure refrigerant so that the heat pump system has a single-open cooling mode for the passenger compartment.

[0099] It can be understood that the evaporator expansion valve 103 atomizes the high-pressure liquid refrigerant flowing out of the high-pressure chamber 121 to make it a low-pressure liquid refrigerant and then inputs it into the evaporator 150. The evaporator 150 works to absorb heat from the refrigerant and converts the low-pressure liquid refrigerant into a low-pressure gaseous refrigerant and then outputs it, thereby achieving cooling of the passenger compartment.

[0100] In this embodiment, a third solenoid valve 104 is provided between the outlet end of the high-pressure chamber 121 and the evaporator expansion valve 103 to switch on and off the refrigerant flowing therethrough.

[0101] It should be noted that when the working mode of the heat pump system is the passenger cabin single cooling mode, the flow process of the refrigerant is as follows: open the first solenoid valve 101, the second solenoid valve 102, the third solenoid valve 104 and the evaporator expansion valve 103, the refrigerant flows out of the compressor 110 and flows through the first condenser 130, the high-pressure chamber 121, the evaporator 150 and the low-pressure chamber 122 in sequence before flowing back into the compressor 110.

[0102] In some embodiments, the heat pump system also includes a battery pack temperature control unit 160, which is connected to the outlet end of the high-pressure chamber 121 through a battery pack expansion valve 105. The battery pack expansion valve 105 is used to convert high-pressure refrigerant into low-pressure refrigerant so that the heat pump system has a battery pack single-open cooling mode.

[0103] It can be understood that the battery pack expansion valve 105 atomizes the high-pressure liquid refrigerant flowing out of the high-pressure chamber 121 to make it into a low-pressure liquid refrigerant and then inputs it into the battery pack temperature control unit 160. The battery pack temperature control unit 160 works to absorb heat from the refrigerant and convert the low-pressure liquid refrigerant into a low-pressure gaseous refrigerant and then outputs it, thereby achieving cooling of the battery pack.

[0104] In this embodiment, a throttle valve 106 is provided at the outlet end of the battery pack temperature control unit 160 for adjusting the flow rate of the refrigerant flowing out of the battery pack temperature control unit 160 .

[0105] It should be noted that when the working mode of the heat pump system is the battery pack single cooling mode, the flow process of the refrigerant is as follows: open the first solenoid valve 101, the second solenoid valve 102, the third solenoid valve 104, the battery pack expansion valve 105 and the throttle valve 106, the refrigerant flows out of the compressor 110 and flows through the first condenser 130, the high-pressure chamber 121, the battery pack temperature control unit 160 and the low-pressure chamber 122 in turn before flowing back into the compressor 110.

[0106] In some embodiments, when the working mode of the heat pump system is the passenger compartment single cooling mode or the battery pack single cooling mode, one of the evaporator 150 and the battery pack temperature control unit 160 works accordingly, and the heat exchange module 120 switches back and forth between the first state and the second state. It should be noted that when the working mode of the heat pump system is the passenger compartment single cooling mode, the evaporator 150 works, and when the working mode of the heat pump system is the battery pack single cooling mode, the battery pack temperature control unit 160 works.

[0107] It can be understood that, on the one hand, heat exchange is carried out between the refrigerant flowing in the high-pressure chamber 121 and the refrigerant flowing in the low-pressure chamber 122, thereby reducing the superheat of the refrigerant controlling the inlet and outlet of the compressor 110 and reducing the energy consumption of the entire heat pump system; on the other hand, the heat exchange module 120 is switched back and forth between the first state and the second state, thereby realizing dynamic storage of the refrigerant in the single-opening refrigeration mode and selectively flowing through the filter drying section 1211, thereby reducing system energy consumption and resistance and improving operating efficiency.

[0108] In some embodiments, when the operating mode of the heat pump system is the single or double-open cooling mode for the passenger compartment and the battery pack, the evaporator 150 and the battery pack temperature control unit 160 both work. At the initial stage of the cooling condition, the heat exchange module 120 is in the first state. When the cooling condition is stable, the heat exchange module 120 is in the second state.

[0109] Similarly, when the working mode of the heat pump system is the dual-open cooling mode for the passenger compartment and the battery pack, the flow process of the refrigerant is as follows: open the first solenoid valve 101, the second solenoid valve 102, the third solenoid valve 104, the evaporator expansion valve 103, the battery pack expansion valve 105 and the throttle valve 106, the refrigerant flows out of the compressor 110 and flows through the first condenser 130 and the high-pressure chamber 121 in turn, and then flows to the evaporator 150 and the battery pack temperature control unit 160 respectively, and then flows from the evaporator 150 and the battery pack temperature control unit 160 to the low-pressure chamber 122 and then flows back into the compressor 110.

[0110] In some embodiments, the heat pump system also has a refrigeration shutdown mode. In the refrigeration shutdown mode, the corresponding evaporator 150 and the battery pack temperature control unit 160 stop working, and the heat exchange module 120 selectively executes the first state, the fourth state and the third state.

[0111] It is understandable that when the temperature difference between the outside temperature and the inside temperature of the vehicle is small, and the load value of the vehicle is small, if the compressor is shut down directly, some refrigerant oil will easily accumulate in the evaporator 150 and the first condenser 130, thereby causing insufficient refrigerant oil circulating in the heat pump system, causing the compressor 110 to malfunction due to insufficient internal refrigerant oil the next time it runs, and even affecting the service life of the compressor 110.

[0112] Therefore, when the temperature difference between the outside temperature and the inside temperature is less than the preset temperature value, and the load value of the vehicle is less than the preset load value, the heat pump system needs to be processed for oil return. That is, the heat exchange module 120 executes the first state to store the refrigerant in the high-pressure chamber 121. When the refrigerant stores a preset amount of refrigerant, the heat exchange module 120 switches to the fourth state to seal the refrigerant, and the compressor 110 is shut down. The liquid refrigerant sealed in the high-pressure chamber 121 exchanges heat with the surrounding high-temperature air and evaporates to become gaseous, thereby separating the refrigerant and the refrigeration oil in the high-pressure chamber 121. By switching the heat exchange module 120 to the third state, the gaseous refrigerant will carry the refrigeration oil out of the high-pressure chamber 121 to the compressor 110 under the action of the pressure difference, thereby completing the oil return of the entire heat pump system, and ensuring that the compressor 110 can operate normally when the next work instruction is received.

[0113] In some embodiments, the heat pump system further has a heating shutdown mode. In the heating shutdown mode, the heat exchange module 120 executes the first state and the fourth state in sequence.

[0114] It can be understood that the high-pressure chamber 121 stores refrigerant through the first state of the heat exchange module 120, and because the refrigerant passes through the drying and filtering part 1211 and then is stored, the quality of the stored refrigerant can be guaranteed, ensuring that the heat pump system operates normally and responds quickly during the next heating. The fourth state of the heat exchange module 120 is used to seal the refrigerant in the high-pressure chamber 121, so that the refrigerant can flow out through the high-pressure chamber 121 in response to the next heating mode of the heat pump system, thereby increasing the amount of refrigerant circulating in the heat pump system, increasing the heating rate and reducing energy consumption.

[0115] In some embodiments, the heat pump system also includes a second condenser and a heat exchanger, a fourth solenoid valve 107 is arranged between the second condenser and the compressor 110, a transition expansion valve 108 is arranged between the second condenser and the heat exchanger, and a fifth solenoid valve 109 is arranged at the inlet end of the transition expansion valve 108.

[0116] It can be understood that the second condenser and the heat exchanger can further improve the energy utilization rate of the heat pump system, reduce energy consumption, and perform thermal management on the vehicle's powertrain.

[0117] An embodiment of the present application also provides a vehicle, which includes a vehicle body and the above-mentioned heat pump system, and the heat pump system is arranged on the vehicle body.

[0118] According to the vehicle provided in the embodiment of the present application, the heat exchange module 120 in the heat pump system performs heat exchange between the high-pressure refrigerant and the low-pressure refrigerant, and the control module in the heat pump system adjusts the flow direction and flow rate of the refrigerant so that the heat exchange module 120 switches between different modes to adapt to different working modes of the heat pump system, thereby reducing the energy consumption of the entire heat pump system, improving the operating efficiency of the heat pump system, extending the service life of the compressor 110, simplifying the structure of the heat pump system, reducing the number of components in the heat pump system, improving the aesthetics of the heat pump system arranged on the vehicle body, and reducing the development cost of the heat pump system.

[0119] This embodiment also provides a refrigerant quantity control method for a heat pump system, which is based on the above-mentioned heat pump system, wherein the refrigerant quantity control method for the heat pump system can be applied to a terminal, and specifically can be executed by hardware or software in the terminal.

[0120] The terminal includes, but is not limited to, a portable communication device such as a mobile phone or tablet computer with a touch-sensitive surface (e.g., a touch screen display and / or a touch pad). It should also be understood that in some embodiments, the terminal may not be a portable communication device, but a desktop computer with a touch-sensitive surface (e.g., a touch screen display and / or a touch pad).

[0121] In the following various embodiments, a terminal including a display and a touch-sensitive surface is described. However, it should be understood that the terminal may include one or more other physical user interface devices such as a physical keyboard, a mouse and a joystick.

[0122] An embodiment of the present application provides a refrigerant quantity control method for a heat pump system. The executor of the refrigerant quantity control method for the heat pump system may be an electronic device or a functional module or functional entity in the electronic device that can implement the refrigerant quantity control method for the heat pump system. The electronic devices mentioned in the embodiment of the present application include but are not limited to mobile phones, tablet computers, computers, cameras, and wearable devices. The refrigerant quantity method for the heat pump system provided in the embodiment of the present application is described below using an electronic device as an example of the executor.

[0123] like Figure 2 As shown, the refrigerant quantity control method of the heat pump system includes steps S201 and S202.

[0124] S201. Receive a target operating instruction, where the target operating instruction is used to instruct the heat pump system to enter a target operating mode.

[0125] It should be noted that the received work instructions may be issued by the driver or passenger, or may be autonomously issued by the vehicle's central control system to the electronic device based on the current vehicle information. Work instructions include but are not limited to: passenger compartment cooling, battery pack cooling, cooling stop and heating stop, and the corresponding heat pump system working modes include but are not limited to: passenger compartment cooling mode, battery pack cooling mode, cooling stop mode and heating stop mode.

[0126] In some embodiments, the operating mode of the heat pump system also includes a dual-open cooling mode (i.e., cooling the passenger compartment first and then adding the battery pack cooling, or cooling the passenger compartment and the battery pack at the same time), a passenger compartment single-source heating mode, a battery pack single-source heating mode, and a dual-source heating mode (i.e., heating the passenger compartment and the battery pack separately).

[0127] S202: according to the pre-established correspondence between the working mode and the operation mode, the heat pump system is placed in a target operation mode, wherein the heat pump system is placed in the target operation mode includes:

[0128] S2021. The compressor 110 operates at a target speed.

[0129] It should be noted that when the working mode is the single-open cooling mode, the target speed is often relatively large, because it is possible to quickly cool down or heat up, that is, the target speed is set based on the working conditions of the double-open cooling mode to provide as much refrigerant as possible. When the working mode is the heating shutdown mode, the target speed should be as low as possible, and the refrigerant should be stored in the high-pressure chamber 121 as much as possible under the premise of avoiding the shutdown of the compressor 110, so as to reduce the energy consumption of the system, thereby improving the operating efficiency of the heat pump system when responding to the next working mode.

[0130] S2022. Control the heat exchange module 120 to execute the first state through the control module. The first state means that the high-pressure refrigerant flowing into the high-pressure chamber 121 of the compressor 110 flows through the drying filter part 1211, and at least part of the refrigerant is stored in the high-pressure chamber 121, and the low-pressure chamber 122 flows out the low-pressure refrigerant to the compressor 110.

[0131] It is understandable that, on the one hand, if the working mode is a single-open cooling mode (i.e., a single-open cooling mode for the passenger compartment or a single-open cooling mode for the battery pack), since the refrigerant is usually provided in a double-open working condition at the initial stage of refrigeration, the amount of refrigerant is relatively large, and part of the refrigerant flowing through is stored in the high-pressure chamber 121 to reduce the amount of refrigerant circulating in the heat pump system, thereby avoiding excessive exhaust pressure of the heat pump system due to excessive amount of refrigerant, and reducing energy consumption. On the other hand, if the working mode is a heating shutdown mode, compared to directly shutting down the entire heat pump system in the related art (the compressor 110 is shut down-the speed is 0), the refrigerant is stored in the high-pressure chamber 121, and the refrigerant can flow out through the high-pressure chamber 121 in response to the next heating mode, thereby increasing the amount of refrigerant circulating in the heat pump system, increasing the heating rate and reducing energy consumption.

[0132] According to the refrigerant quantity control method of the heat pump system provided in the embodiment of the present application, no matter the working mode is the single-open cooling mode or the heating shutdown mode, by making the heat exchange module 120 execute the first state, not only the energy consumption can be reduced, but also the operating efficiency of the heat pump system can be effectively improved, thereby improving the economy of the use of the heat pump system.

[0133] In addition, the heat exchange module 120 formed by the integrated high-pressure chamber 121 and the low-pressure chamber 122 can not only realize the heat exchange between the refrigerant flowing in the high-pressure chamber 121 and the refrigerant flowing in the low-pressure chamber 122, but also reduce the superheat of the refrigerant controlling the inlet and outlet of the compressor 110, reduce the energy consumption of the entire heat pump system, improve the operating efficiency of the heat pump system, and extend the service life of the compressor 110, but also simplify the structure of the heat pump system, reduce the number of components in the heat pump system, improve the aesthetics of the heat pump system arranged on the vehicle body, and reduce the development cost of the heat pump system.

[0134] In some embodiments, Figure 3As shown, when the target working instruction is to cool down the passenger compartment or the battery pack, and the corresponding target working mode is the passenger compartment cooling mode or the battery pack cooling mode, after step S202, the following steps are also included:

[0135] S203: Obtain the current system compression ratio R.

[0136] S204 , if the current system compression ratio R is not greater than the preset compression ratio B (R≤B), the heat exchange module 120 is controlled by the control module to execute the second state, where the second state means that the high-pressure refrigerant flowing into the high-pressure chamber 121 does not flow through the drying filter 1211 .

[0137] It should be noted that if R>B, it means that the heat pump system is still in the initial cooling state, and the compressor 110 needs to operate at the target speed. It can be understood that the target speed can be dynamically adjusted according to the operating time and state of the compressor 110, and this embodiment does not impose specific restrictions.

[0138] In this embodiment, before step S203, the expansion valve is opened at the target opening value. If R>B, the expansion valve is opened at the target opening value. The target opening values ​​before and after are not necessarily the same and can be dynamically adjusted according to actual conditions. This embodiment does not impose specific restrictions. It should be noted that when the target operating mode is the passenger compartment single cooling mode, the expansion valve is the evaporator expansion valve 103; when the target operating mode is the battery pack single cooling mode, the expansion valve is the battery pack expansion valve 105.

[0139] It can be understood that when R≤B appears for the first time, it means that the refrigeration mode is in the refrigeration stability period. At this time, the pressure of the heat pump system reaches the optimal state. On the one hand, the high-pressure refrigerant does not need to flow through the drying filter part 1211, thereby reducing the system resistance and reducing energy consumption; on the other hand, enough refrigerant has been stored in the high-pressure chamber 121, and the amount of refrigerant participating in the circulation in the heat pump system has also reached the optimal value. The amount of refrigerant required to be stored in the high-pressure chamber 121 is reduced, further reducing energy consumption.

[0140] S205 . Update the rotation speed of the compressor 110 and the opening of the expansion valve in real time until receiving a refrigeration stop instruction.

[0141] It should be noted that since the operating state of the heat pump system is affected by many factors (such as the external environment and the operating information of the vehicle, etc.), by dynamically adjusting the speed of the compressor 110 and the opening of the evaporator expansion valve 103 during the refrigeration process, the refrigeration effect can be ensured to be always at its best. It is understandable that when the target working mode is the passenger cabin single cooling mode, the real-time updated expansion valve opening refers to the evaporator expansion valve 103 opening; when the target working mode is the battery pack single cooling mode, the real-time updated expansion valve refers to the battery pack expansion valve 105 opening.

[0142] In some embodiments, the real-time updating of the compressor 110 speed and the expansion valve opening in step S205 further includes the following steps:

[0143] Obtain the current system compression ratio R and current superheat SH in real time;

[0144] The relationship between the current system compression ratio R and the preset compression ratio B, as well as the relationship between the current superheat SH and the preset superheat C are determined in real time. If the system compression ratio R is greater than the preset compression ratio B (R>B), and the current superheat SH is less than the preset superheat C (SH<C), the heat exchange module 120 is controlled to execute the first state.

[0145] It can be understood that, since when the refrigeration mode is in a stable state, on the one hand, the speed of the compressor 110 and the opening of the expansion valve will be dynamically adjusted, and on the other hand, the refrigeration load will continue to decrease, and the amount of refrigerant required by the heat pump system will also continue to decrease. By switching the heat exchange module 120 back to the first state to store the refrigerant, it can be ensured that the operating state of the system is always optimal.

[0146] It should be noted that when the target operating mode is the passenger compartment cooling mode, the current superheat refers to the superheat at the outlet of the evaporator 150; when the target operating mode is the battery pack cooling mode, the current superheat refers to the superheat at the second end of the battery pack temperature control unit 160.

[0147] In some embodiments, the relationship between the system compression ratio and the preset compression ratio, and the relationship between the current superheat and the preset superheat are determined in real time, and then the following includes:

[0148] If the system compression ratio R is not greater than the preset compression ratio B (R≤B), or the current superheat degree SH is not less than the preset superheat degree C (SH≥C), the heat exchange module 120 continues to execute the second state.

[0149] It should be noted that when the refrigeration mode is in a stable state, the speed of the compressor 110 and the opening of the expansion valve are dynamically adjusted, and the heat exchange module 120 is continuously switched between the first state and the second state based on the comparison between R and B and SH and C, thereby realizing dynamic storage during the refrigeration process.

[0150] It can be understood that through S2022 and steps S203-S205, large-scale storage in the initial stage of refrigeration and dynamic storage in the refrigeration stabilization period in the single-open refrigeration mode are realized, thereby achieving dynamic control of the optimal refrigerant circulation amount during the system cooling process.

[0151] In some embodiments, when the target operating mode is the passenger cabin single cooling mode, until a cooling stop instruction is received, the method further includes:

[0152] Receive a battery pack cooling work instruction, and switch the target working mode from the single-open cooling mode to the dual-open cooling mode;

[0153] The heat exchange module 120 is controlled to execute the second state through the control module, and the amount of refrigerant flowing out of the high-pressure chamber 121 is adjusted through the control module.

[0154] It can be understood that when switching from the single-opening refrigeration mode to the double-opening refrigeration mode, the load increases and the amount of refrigerant required to circulate in the heat pump system increases. Regardless of whether the heat exchange module 120 executes the first state or the second state before switching to the double-opening refrigeration mode, by making the heat exchange module 120 execute the second state, the temperature can be quickly reduced, and by adjusting the amount of refrigerant flowing out of the high-pressure chamber 121, the amount of refrigerant participating in the circulation is increased, thereby quickly adapting to the heat load that the heat pump system needs to bear, quickly reducing the refrigerant temperature at the outlet of the high-pressure chamber 121, and completing the refrigerant replenishment, thereby improving operating efficiency and reducing energy consumption.

[0155] In the related art, when the temperature difference between the inside and outside of the vehicle is not large and the load value of the vehicle is small, the speed of the compressor 110 in the cooling mode is often low. After the whole vehicle is powered off, some refrigerant oil will accumulate in the evaporator 150 and the first condenser 130, thereby causing insufficient refrigerant oil circulating in the heat pump system, causing the compressor 110 to malfunction due to insufficient internal refrigerant oil the next time it runs, and even affecting the service life of the compressor 110.

[0156] In order to solve the above technical problem, in some embodiments, receiving a cooling stop instruction further includes:

[0157] Get current environment information;

[0158] If the current environmental information meets the oil return condition, the heat exchange module 120 is controlled by the control module to sequentially execute the first state and the fourth state, and the compressor 110 is shut down. The fourth state means that after the high-pressure chamber 121 stores a preset amount of refrigerant, no refrigerant flows into or out of the high-pressure chamber 121;

[0159] The heat exchange module 120 is controlled by the control module to execute the third state. The third state means that after the high-pressure chamber 121 stores a preset amount of refrigerant, only refrigerant flows out of the high-pressure chamber 121 .

[0160] It should be noted that the environmental information includes the outside temperature of the vehicle, the inside temperature of the vehicle and the load value of the vehicle.

[0161] It should be noted that the environmental information satisfies the oil return condition when the temperature difference between the outside temperature and the inside temperature is less than a preset temperature value, and the load value of the vehicle is less than a preset load value.

[0162] It is understandable that when the environmental information meets the oil return condition, the heat exchange module 120 executes the first state to store the refrigerant in the high-pressure chamber 121. After the refrigerant stores a preset amount of refrigerant, the heat exchange module 120 switches to the fourth state to seal the refrigerant and shut down the compressor 110, that is, the heat pump system is in the refrigeration shutdown mode. At this time, the liquid refrigerant sealed in the high-pressure chamber 121 exchanges heat with the surrounding high-temperature air and evaporates and becomes gaseous, thereby separating the refrigerant and the refrigeration oil in the high-pressure chamber 121. By switching the heat exchange module 120 to the third state, the gaseous refrigerant will carry the refrigeration oil out of the high-pressure chamber 121 to the compressor 110 under the action of the pressure difference, thereby completing the oil return of the entire heat pump system and ensuring that the compressor 110 can operate normally when the next work instruction is received.

[0163] In some embodiments, obtaining current environment information further includes:

[0164] If the current environmental information does not meet the oil return condition, the compressor 110 is shut down.

[0165] It is understandable that when the environmental information does not meet the oil return condition, it means that the compressor 110 has sufficient refrigeration oil, that is, there is no need to consider oil return processing for the heat pump system.

[0166] In some embodiments, Figure 4 As shown, when the target working instruction is heating stop and the corresponding target working mode is heating shutdown mode, after step S202, steps S301 and S302 are also included.

[0167] Step S301 : Obtain inlet information of the compressor 110 .

[0168] It should be noted that the inlet information of the compressor 110 includes the temperature value P and the pressure T, which are used to facilitate the determination of the amount of refrigerant currently stored in the heat pump system and the specific state of the heat pump system in the heating shutdown mode.

[0169] Step S302: If the inlet information meets the preset condition, the heat exchange module 120 is controlled by the control module to execute the fourth state. The fourth state means that after the high-pressure chamber 121 stores a preset amount of refrigerant, no refrigerant flows into or out of the high-pressure chamber 121.

[0170] It should be noted that the preset temperature is a, the preset pressure is b, and P is greater than a and T is greater than b, which is considered that the inlet information meets the preset conditions.

[0171] It can be understood that the inlet information meets the preset conditions, indicating that the high-pressure chamber 121 has stored all the refrigerant, and the refrigerant does not flow in or out of the high-pressure chamber 121, thereby sealing the stored refrigerant so that it can respond quickly when receiving a new heating command to improve the heating efficiency.

[0172] It should be noted that, before step S302, the battery pack expansion valve 105 is opened according to a first preset opening value, and the evaporator expansion valve 103 is opened according to a second preset value. The first preset opening value and the second preset opening value are respectively the minimum opening values ​​that the battery pack expansion valve 105 and the evaporator expansion valve 103 can reach, so as to minimize the energy consumption in the heating shutdown mode.

[0173] In some embodiments, if the entry information meets the preset conditions, the following further includes:

[0174] The compressor 110 is shut down, and the evaporator expansion valve 103 and the battery pack expansion valve 105 are both adjusted to the corresponding maximum openings.

[0175] It can be understood that, since the high-pressure chamber 121 has sealed the refrigerant at this time, the amount of refrigerant circulating in the heat pump system is very small and can be regarded as non-existent, so the speed of the compressor 110 is adjusted to 0 to shut down the compressor 110, and the evaporator expansion valve 103 and the battery pack expansion valve 105 are adjusted to the corresponding maximum opening to achieve reset, thereby ensuring that the pressure of the heat pump system can quickly reach equilibrium.

[0176] In some embodiments, after the compressor 110 runs at the target speed, it also includes: the electronic fan of the radiator is turned on to the maximum gear, so that the high-temperature and high-pressure gaseous refrigerant at the outlet of the compressor 110 can be cooled as quickly as possible to achieve refrigerant condensation, thereby increasing the rate at which the high-pressure chamber 121 stores the refrigerant.

[0177] It should be noted that if the heat pump system was previously in the passenger cabin single-source heating mode, in the heating shutdown mode, the refrigerant is mainly concentrated in the second condenser and the low-pressure chamber 122; if the heat pump system was previously in the battery pack single-source heating mode, in the heating shutdown mode, the refrigerant is mainly concentrated in the battery pack temperature control unit 160 and the low-pressure chamber 122; if the heat pump system was previously in the dual-source heating mode, in the heating shutdown mode, the refrigerant is mainly concentrated in the battery pack temperature control unit 160 and the second condenser.

[0178] The refrigerant quantity control method for a heat pump system provided in the embodiment of the present application may be executed by a refrigerant quantity control device 400 for a heat pump system. In the embodiment of the present application, the refrigerant quantity control device 400 for a heat pump system executing the refrigerant quantity control method for a heat pump system is taken as an example to illustrate the refrigerant quantity control device 400 for a heat pump system provided in the embodiment of the present application.

[0179] The embodiment of the present application also provides a refrigerant quantity control device 400 for a heat pump system.

[0180] like Figure 5 As shown, the refrigerant quantity control device 400 of the heat pump system includes:

[0181] A receiving module 410 is used to receive a target operation instruction, where the target operation instruction is used to instruct the heat pump system to enter a target operation mode;

[0182] The working module 420 is used to make the heat pump system in a target operating mode according to the pre-established correspondence between the working mode and the operating mode, wherein the heat pump system is in the target operating mode includes:

[0183] The compressor 110 operates at a target speed;

[0184] The heat exchange module 120 is controlled by the control module to execute the first state, which means that the high-pressure refrigerant flowing into the high-pressure chamber 121 of the compressor 110 flows through the drying filter part 1211, and at least part of the refrigerant is stored in the high-pressure chamber 121, and the low-pressure chamber 122 flows out the low-pressure refrigerant to the compressor 110.

[0185] According to the refrigerant quantity control device 400 of the heat pump system provided in the embodiment of the present application, through the above-mentioned refrigerant quantity control method of the heat pump system, no matter whether the working mode is the single-open cooling mode or the heating shutdown mode, by making the heat exchange module 120 execute the first state, not only the energy consumption can be reduced, but also the operating efficiency of the heat pump system can be effectively improved, and the economy of the use of the heat pump system can be improved.

[0186] In some embodiments, the receiving module 410 is further used to obtain the current system compression ratio;

[0187] The working module 420 can also be used for: if the current system compression ratio is not greater than the preset compression ratio, the heat exchange module 120 is controlled through the control module to execute the second state, and the second state means that the high-pressure refrigerant flowing into the high-pressure chamber 121 does not flow through the drying filter part 1211; the compressor 110 speed and the expansion valve opening are updated in real time until the refrigeration stop command is received.

[0188] In some embodiments, the receiving module 410 may also be used to: obtain the current system compression ratio and the current superheat in real time;

[0189] The working module 420 can also be used to: determine in real time the relationship between the current system compression ratio and the preset compression ratio, as well as the relationship between the current superheat and the preset superheat. If the system compression ratio is greater than the preset compression ratio and the current superheat is less than the preset superheat, the heat exchange module 120 is controlled to execute the first state.

[0190] In some embodiments, the working module 420 can also be used to enable the heat exchange module 120 to continue to execute the second state if the system compression ratio is not greater than the preset compression ratio, or the current superheat is not less than the preset superheat.

[0191] In some embodiments, the receiving module 410 may also be used to obtain current environment information.

[0192] The working module 420 can also be used to: if the current environmental information meets the oil return condition, the heat exchange module 120 is controlled to execute the first state and the fourth state in sequence through the control module, and the fourth state means that after the high-pressure chamber 121 stores a preset amount of refrigerant, the high-pressure chamber 121 does not flow in or out of the refrigerant, and the compressor 110 is shut down;

[0193] The heat exchange module 120 is controlled by the control module to execute the third state. The third state means that after the high-pressure chamber 121 stores a preset amount of refrigerant, only refrigerant flows out of the high-pressure chamber 121 .

[0194] In some embodiments, the receiving module 410 is further used to obtain inlet information of the compressor 110;

[0195] The working module 420 can also be used to: if the inlet information meets the preset conditions, the heat exchange module 120 is controlled by the control module to execute the fourth state, and the fourth state means that after the high-pressure chamber 121 stores a preset amount of refrigerant, the high-pressure chamber 121 does not flow in or out of the refrigerant.

[0196] In some embodiments, the working module 420 can also be used to control the compressor 110 to shut down, and adjust the evaporator expansion valve 103 and the battery pack expansion valve 105 to the corresponding maximum openings.

[0197] The refrigerant quantity control device 400 of the heat pump system in the embodiment of the present application can be an electronic device, or a component in the electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal, or other devices other than the terminal. Exemplarily, the electronic device can be a mobile phone, a tablet computer, a laptop computer, a PDA, a car electronic device, a mobile Internet device (Mobile Internet Device, MID), an augmented reality (augmented reality, AR) / virtual reality (virtual reality, VR) device, a robot, a wearable device, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a netbook or a personal digital assistant (personal digital assistant, PDA), etc., and can also be a server, a network attached storage (Network Attached Storage, NAS), a personal computer (personal computer, PC), a television (television, TV), a teller machine or a self-service machine, etc., which is not specifically limited in the embodiment of the present application.

[0198] The refrigerant quantity control device 400 of the heat pump system in the embodiment of the present application may be a device having an operating system. The operating system may be a Microsoft (Windows) operating system, an Android (Android) operating system, an IOS operating system, or other possible operating systems, which are not specifically limited in the embodiment of the present application.

[0199] The refrigerant quantity control device 400 of the heat pump system provided in the embodiment of the present application can achieve Figures 2 to 4 To avoid repetition, the various processes implemented by the method embodiment are not described here.

[0200] An embodiment of the present application also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the various processes of the above-mentioned refrigerant quantity control method embodiment of the heat pump system are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0201] The processor is the processor in the electronic device in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

[0202] An embodiment of the present application also provides a computer program product, including a computer program, which implements the refrigerant quantity control method of the heat pump system when executed by a processor.

[0203] The processor is the processor in the electronic device in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

[0204] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, which are coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-mentioned refrigerant quantity control method embodiment of the heat pump system, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0205] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0206] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0207] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0208] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

[0209] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" 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 present application. 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 may be combined in any one or more embodiments or examples in a suitable manner.

[0210] Although the embodiments of the present application 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 application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A heat pump system, characterized in that: include: A compressor (110); A heat exchange module (120), the heat exchange module (120) comprising an integrated high-pressure chamber (121) and a low-pressure chamber (122), the inlet end of the high-pressure chamber (121) being connected to the outlet of the compressor (110) for inflow and outflow of high-pressure refrigerant and for storing the refrigerant, and a drying filter (1211) being provided in the high-pressure chamber (121), the outlet end of the low-pressure chamber (122) being connected to the inlet of the compressor (110) for inflow and outflow of low-pressure refrigerant and for gas-liquid separation of the refrigerant; A control module is used to control the high-pressure refrigerant to selectively flow through the drying and filtering portion (1211) and the high-pressure chamber (121).

2. The heat pump system according to claim 1, characterized in that: The high-pressure chamber (121) is disposed in the low-pressure chamber (122).

3. The heat pump system according to claim 1 or 2, characterized in that: The heat exchange module (120) has a first state and a second state. In the first state, the high-pressure refrigerant flowing into the high-pressure chamber (121) flows through the drying filter part (1211), the high-pressure chamber (121) stores and flows out the high-pressure refrigerant, and the low-pressure refrigerant flows into and flows out of the low-pressure chamber (122); in the second state, the high-pressure refrigerant flowing into the high-pressure chamber (121) does not flow through the drying filter part (1211), the high-pressure chamber (121) stores and flows out the high-pressure refrigerant, and the low-pressure refrigerant flows into and flows out of the low-pressure chamber (122).

4. The heat pump system according to claim 3, characterized in that: The heat exchange module (120) has a third state. In the third state, the high-pressure refrigerant does not flow into the high-pressure chamber (121), and only flows out the high-pressure refrigerant from the high-pressure chamber (121), and the low-pressure refrigerant flows into and flows out of the low-pressure chamber (122).

5. The heat pump system according to claim 4, characterized in that: The heat exchange module (120) has a fourth state. In the fourth state, the high-pressure refrigerant neither flows into nor flows out of the high-pressure chamber (121), and the low-pressure refrigerant flows into and flows out of the low-pressure chamber (122).

6. The heat pump system according to claim 5, characterized in that: The heat pump system further comprises an evaporator (150) and a battery pack temperature control unit (160), which are respectively connected to the outlet end of the high-pressure chamber (121) and the inlet end of the low-pressure chamber (122); The heat pump system has a passenger compartment single cooling mode and a battery pack single cooling mode. In the passenger compartment single cooling mode or the battery pack single cooling mode, one of the evaporator (150) and the battery pack temperature control unit (160) works accordingly, and the heat exchange module (120) switches back and forth between the first state and the second state.

7. The heat pump system according to claim 6, characterized in that: The heat pump system has a refrigeration shutdown mode. In the refrigeration shutdown mode, the heat exchange module (120) selectively executes the first state, the fourth state and the third state in sequence.

8. The heat pump system according to claim 5, characterized in that: The heat pump system has a heating shutdown mode. In the heating shutdown mode, the heat exchange module (120) sequentially executes the first state and the fourth state.

9. A vehicle, characterized in that: The invention comprises a vehicle body and a heat pump system according to any one of claims 1 to 8, wherein the heat pump system is arranged on the vehicle body.

10. A method for controlling the amount of refrigerant in a heat pump system, based on the heat pump system according to any one of claims 1 to 8, characterized in that: include: receiving a target operation instruction, wherein the target operation instruction is used to instruct the heat pump system to enter a target operation mode; According to the pre-established correspondence between the working mode and the operation mode, the heat pump system is placed in a target operation mode, wherein the heat pump system is placed in the target operation mode includes: The compressor (110) operates at a target speed; The control module is used to cause the heat exchange module (120) to execute a first state, wherein the first state refers to the high-pressure refrigerant flowing into the high-pressure chamber (121) flowing through the drying filter part (1211), the high-pressure chamber (121) storing and discharging the high-pressure refrigerant, and the low-pressure chamber (122) flowing into and discharging the low-pressure refrigerant.

11. The refrigerant quantity control method of a heat pump system according to claim 10, characterized in that: When the target operating mode is a passenger compartment cooling mode or a battery pack cooling mode, after the heat pump system is in the target operating mode, the further step includes: Get the current system compression ratio; If the current system compression ratio is not greater than the preset compression ratio, the control module causes the heat exchange module (120) to execute a second state, wherein the second state means that the high-pressure refrigerant flowing into the high-pressure chamber (121) does not flow through the drying filter portion (1211), the high-pressure chamber (121) stores and flows out the high-pressure refrigerant, and the low-pressure chamber (122) flows in and flows out the low-pressure refrigerant; The rotation speed of the compressor (110) and the opening of the expansion valve are updated in real time until a refrigeration stop instruction is received.

12. The refrigerant quantity control method of a heat pump system according to claim 11, characterized in that: The real-time updating of the compressor (110) rotation speed and the expansion valve opening degree further comprises: Obtain the current system compression ratio and current superheat in real time; The relationship between the current system compression ratio and the preset compression ratio, and the relationship between the current superheat and the preset superheat are determined in real time; if the system compression ratio is greater than the preset compression ratio, and the current superheat is less than the preset superheat, the heat exchange module (120) is caused to execute the first state through the control module.

13. The refrigerant quantity control method of the heat pump system according to claim 12, characterized in that: The real-time determination of the relationship between the system compression ratio and the preset compression ratio, and the relationship between the current superheat and the preset superheat, further comprises: If the system compression ratio is not greater than the preset compression ratio, or the current superheat is not less than the preset superheat, the heat exchange module (120) continues to execute the second state.

14. The refrigerant quantity control method of a heat pump system according to any one of claims 11 to 13, characterized in that: The method further comprises: until receiving a refrigeration stop instruction; Get current environment information; If the current environmental information satisfies the oil return condition, the control module is used to cause the heat exchange module (120) to sequentially execute the first state and the fourth state, and to stop the compressor (110), wherein the fourth state means that after the high-pressure chamber (121) stores a preset amount of refrigerant, the refrigerant neither flows into nor flows out of the high-pressure chamber (121), and the low-pressure chamber (122) flows into and flows out of the low-pressure refrigerant; The control module is used to cause the heat exchange module (120) to execute a third state, wherein the third state means that after the high-pressure chamber (121) stores a preset amount of refrigerant, the high-pressure refrigerant does not flow into the high-pressure chamber (121), and the high-pressure chamber (121) only flows out the refrigerant, and the low-pressure chamber (122) flows in and out of the low-pressure refrigerant.

15. The refrigerant quantity control method of a heat pump system according to claim 10, characterized in that: When the target working mode is the heating shutdown mode, after the heat pump system is in the target operation mode, the method further includes: Obtaining inlet information of the compressor (110); If the inlet information meets the preset conditions, the control module causes the heat exchange module (120) to execute the fourth state, wherein the fourth state means that after the high-pressure chamber (121) stores a preset amount of refrigerant, the refrigerant neither flows into nor flows out of the high-pressure chamber (121), and the low-pressure refrigerant flows into and flows out of the low-pressure chamber (122).

16. The refrigerant quantity control method of the heat pump system according to claim 15, characterized in that: If the entry information meets the preset condition, the method further includes: The compressor (110) is stopped, and the evaporator expansion valve (103) and the battery pack expansion valve (105) are adjusted to corresponding maximum openings.

17. A refrigerant quantity control device for a heat pump system, characterized in that: include: A receiving module, used for receiving a target working instruction, wherein the target working instruction is used for instructing the heat pump system to enter a target working mode; The working module is used to make the heat pump system in a target operating mode according to the pre-established correspondence between the working mode and the operating mode, wherein the heat pump system in the target operating mode includes: The compressor (110) operates at a target speed; The heat exchange module (120) is controlled by the module to execute a first state, wherein the first state refers to the high-pressure refrigerant flowing into the high-pressure chamber (121) flowing through the drying filter part (1211), the high-pressure chamber (121) storing and discharging the high-pressure refrigerant, and the low-pressure chamber (122) flowing into and discharging the low-pressure refrigerant.

18. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the refrigerant quantity control method of the heat pump system as claimed in any one of claims 10 to 16 is implemented.

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