Control method and device of heat pump system, computer program product and vehicle

Abstract

The invention is suitable for the technical field of heat management, and provides a control method and device of a heat pump system, a computer program product and a vehicle. A heat regenerator of the heat pump system is connected with an evaporator and / or a battery heat management assembly through a first throttling valve, wherein the evaporator and / or the battery heat management assembly are / is used for controlling the temperature of a passenger compartment. The heat regenerator is connected with the outdoor heat exchanger through a second throttling valve; the control method of the heat pump system comprises the steps that the current operation mode of the heat pump system is determined; and opening control is conducted on the first throttling valve and the second throttling valve according to the current operation mode. According to the embodiment of the invention, the performance coefficient of the heat pump system can be improved.

Description

Technical Field

[0001] The present application belongs to the field of thermal management technology, and in particular, relates to a control method, device, computer program product and vehicle for a heat pump system. Background Art

[0002] The vehicle's heat pump system is used to meet the needs of cooling and heating in the vehicle. In order to improve the coefficient of performance (COP), the heat pump system usually introduces a regenerator. However, in most heat pump system architectures, the regenerator can only perform heat exchange in cooling mode, and cannot perform heat exchange in heating mode, resulting in the high-pressure side being unable to perform a large temperature slide in heating mode, and the coefficient of performance is reduced. Summary of the invention

[0003] Embodiments of the present application provide a control method, device, computer program product, and vehicle for a heat pump system, which can improve the coefficient of performance of the heat pump system.

[0004] A first aspect of an embodiment of the present application provides a control method for a heat pump system, wherein a heat regenerator of the heat pump system is connected to an evaporator and / or a battery thermal management component for controlling the temperature of a passenger compartment via a first throttle valve; and the heat regenerator is connected to an outdoor heat exchanger via a second throttle valve. The control method for the heat pump system comprises: determining a current operating mode of the heat pump system; and controlling the opening of the first throttle valve and the second throttle valve, respectively, according to the current operating mode.

[0005] In an embodiment of the present application, a first throttle valve is arranged between the regenerator and the evaporator and / or the battery thermal management component, and a second throttle valve is arranged between the regenerator and the outdoor heat exchanger, and the opening of the first throttle valve and the second throttle valve are respectively controlled according to the current operating mode of the heat pump system. By controlling the opening of the throttle valves before and after the regenerator, heat exchange of the regenerator can be achieved in the heating mode, so that the high-pressure side can be cooled to a lower temperature, thereby improving the performance coefficient of the heat pump system.

[0006] In some embodiments of the first aspect, the first throttle valve includes a third throttle valve connected to the evaporator and a fourth throttle valve connected to the battery thermal management component; the evaporator and the battery thermal management component are both connected to the indoor heat exchanger; the first throttle valve and the second throttle valve are respectively controlled in opening degree according to the current operation mode, including: if the current operation mode is the heating mode, then in the third throttle valve and the fourth throttle valve, the target throttle valve to be opened and the non-target throttle valve to be closed are respectively determined; the non-target throttle valve is controlled to be closed, and the second throttle valve and the target throttle valve are throttled. In this way, the third throttle valve or the fourth throttle valve, as well as the second throttle valve, can be throttled for the heating mode, so that the heat pump system can achieve heat exchange of the regenerator in the heating mode.

[0007] In some embodiments of the first aspect, the target throttle valve to be opened and the non-target throttle valve to be closed are determined in the third throttle valve and the fourth throttle valve, respectively, including: obtaining a core mode of the heat pump system, the core mode representing the heating requirements of the passenger compartment and the battery; and determining the target throttle valve and the non-target throttle valve in the third throttle valve and the fourth throttle valve according to the core mode. By determining the throttle valve to be opened through the core mode, the control of the throttle valve can be adapted to the heating requirements of the passenger compartment and the battery.

[0008] In some embodiments of the first aspect, if the target throttle valve is a third throttle valve, the throttling control of the second throttle valve and the target throttle valve includes: obtaining the inlet temperature of the indoor heat exchanger and the first outlet temperature of the evaporator; when the first outlet temperature is greater than or equal to the first temperature threshold, and the inlet temperature is less than or equal to the second temperature threshold, controlling the third throttle valve to be fully opened, and controlling the opening of the second throttle valve according to the optimal pressure; when the first outlet temperature is less than or equal to the third temperature threshold, or the inlet temperature is greater than or equal to the fourth temperature threshold, controlling the second throttle valve to be fully opened, and controlling the opening of the third throttle valve according to the optimal pressure. In this way, it is possible to determine whether the heat pump system has a heat recovery demand based on the temperature of the refrigerant before passing through the passenger compartment and after passing through the evaporator, and switch between the heat recovery mode and the conventional throttling control to improve the performance coefficient.

[0009] In some embodiments of the first aspect, if the target throttle valve is the fourth throttle valve, the throttling control of the second throttle valve and the target throttle valve includes: obtaining the second outlet temperature and inlet temperature of the indoor heat exchanger; when the second outlet temperature is greater than or equal to the fifth temperature threshold, and the inlet temperature is less than or equal to the sixth temperature threshold, controlling the fourth throttle valve to be fully open, and controlling the opening of the second throttle valve according to the optimal pressure; when the second outlet temperature is less than the seventh temperature threshold, or the inlet temperature is greater than the eighth temperature threshold, controlling the second throttle valve to be fully open, and controlling the opening of the fourth throttle valve according to the optimal pressure. In this way, it is possible to determine whether the heat pump system has a heat recovery demand based on the temperature conditions before and after the refrigerant passes through the indoor heat exchanger, and switch between the heat recovery mode and the conventional throttling control to improve the performance coefficient.

[0010] In some implementations of the first aspect, the first throttle valve and the second throttle valve are respectively controlled to open according to the current operation mode, including: if the current operation mode is the cooling mode, the second throttle valve is controlled to be fully opened, and the first throttle valve is throttled. In this way, the throttle valve control can be performed for the cooling mode, so that the heat pump system can achieve heat exchange of the regenerator in the cooling mode.

[0011] According to a second aspect of an embodiment of the present application, a control device for a heat pump system is provided, wherein a heat regenerator of the heat pump system is connected to an evaporator and / or a battery thermal management component for controlling the temperature of the passenger compartment via a first throttle valve; and the heat regenerator is connected to an outdoor heat exchanger via a second throttle valve; the control device for the heat pump system comprises: a determination unit for determining a current operating mode of the heat pump system; and a control unit for controlling the opening of the first throttle valve and the second throttle valve, respectively, according to the current operating mode.

[0012] A third aspect of an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the control method of the above-mentioned heat pump system are implemented.

[0013] A fourth aspect of an embodiment of the present application provides a vehicle, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the vehicle comprises a heat pump system, wherein a heat regenerator of the heat pump system is connected to an evaporator and / or a battery thermal management component for controlling the temperature of the passenger compartment via a first throttle valve; and the heat regenerator is connected to an outdoor heat exchanger via a second throttle valve, and the processor implements the steps of the control method of the above-mentioned heat pump system when executing the computer program.

[0014] In some embodiments of the fourth aspect, the first throttle valve includes a third throttle valve connected to the evaporator and a fourth throttle valve connected to the battery thermal management component; the evaporator and the battery thermal management component are both connected to an indoor heat exchanger.

[0015] A fifth aspect of an embodiment of the present application provides a computer program product, which, when executed on a vehicle, enables the vehicle to execute the control method of the heat pump system.

[0016] The beneficial effects of the above-mentioned second to fifth aspects of the embodiments can be referred to the description of the first aspect of the embodiments, and this application will not elaborate on them. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of an implementation flow of a control method for a heat pump system provided in an embodiment of the present application;

[0019] Figure 2 is a structural schematic diagram of a heat pump system provided in an embodiment of the present application;

[0020] Figure 3 It is a schematic diagram of a specific implementation flow of controlling the opening of the first throttle valve and the second throttle valve respectively provided in an embodiment of the present application;

[0021] Figure 4 is a structural schematic diagram of a control device for a heat pump system provided in an embodiment of the present application;

[0022] Figure 5 It is a schematic diagram of the structure of a vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are protected by the present application.

[0024] In most heat pump system architectures, in cooling mode, the circuit connecting the regenerator to the outdoor heat exchanger is in a high-pressure state, and the circuit connected to the compressor is in a low-pressure state, so that heat exchange can be performed between the high-pressure and low-pressure circuits of the regenerator. In heating mode, the circuit connecting the regenerator to the outdoor heat exchanger and the circuit connected to the compressor both become low-pressure circuits, and heat exchange cannot be performed between them, resulting in the inability to perform a large temperature glide on the high-pressure side in heating mode, and a decrease in the coefficient of performance.

[0025] In view of this, the present application proposes a control method for a heat pump system, which can realize heat exchange of the heat exchanger in the heating mode by controlling the opening of the throttle valves before and after the heat exchanger, so that the high-pressure side can be cooled to a lower temperature, thereby improving the performance coefficient of the heat pump system.

[0026] In order to illustrate the technical solution of the present application, a specific embodiment is provided below for illustration.

[0027] Figure 1 The present invention provides a schematic diagram of a control method for a heat pump system, which can be applied to a heat pump system. The heat pump system can be arranged in a vehicle, which can be a hybrid vehicle, a pure electric vehicle, a fuel vehicle or other types of vehicles, which is not limited by the present invention.

[0028] In an embodiment of the present application, the heat pump system may include a regenerator, which can be used to transfer heat from the liquid refrigerant to the refrigerant suction end of the compressor to absorb the waste heat of the liquid refrigerant. The regenerator of the heat pump system is connected to the evaporator and / or the battery thermal management component for controlling the temperature of the passenger compartment through a first throttle valve, and the regenerator is connected to the outdoor heat exchanger through a second throttle valve.

[0029] In some specific embodiments, the first throttle valve may include a third throttle valve connected to the evaporator and a fourth throttle valve connected to the battery thermal management component. The evaporator and the battery thermal management component are both connected to the indoor heat exchanger.

[0030] Wherein, the first throttle valve (including the third throttle valve and the fourth throttle valve) and the second throttle valve may both refer to electronic expansion valves (EXV).

[0031] In some specific implementations, the regenerator and the gas-liquid separator of the heat pump system may be designed as an integrated unit, thereby reducing structural complexity and improving vehicle integration.

[0032] In some specific implementations, please refer to Figure 2 ( Figure 2The arrow flow direction in the figure is the flow direction in the heating mode), and the outdoor heat exchanger (OHX) can be connected to the first thermal management component (Chiller1). The first thermal management component is connected to the first end of the first reversing valve, the second end of the first reversing valve is connected to the indoor heat exchanger (IGC), and the third end of the first reversing valve is connected to the evaporator (EVP) and the second thermal management component (Chiller2), respectively. The first thermal management component is also connected to the first end of the second reversing valve, the second end of the second reversing valve is connected to the first pipeline of the heat exchanger, and the third end of the second reversing valve is connected to the evaporator and the second thermal management component, respectively. The first pipeline is connected to the indoor heat exchanger through the compressor. The evaporator is connected to the second pipeline of the heat exchanger through the third throttle valve (EXV3), and the second thermal management component is connected to the second pipeline of the heat exchanger through the fourth throttle valve (EXV4). The second pipeline is connected to the outdoor heat exchanger through the second throttle valve (EXV2).

[0033] Wherein, the first reversing valve and the second reversing valve can both be electro-pneumatic valves (EPV).

[0034] In some embodiments of the present application, the first thermal management component can also be connected to the motor circuit through the third reversing valve, the fourth reversing valve, the first water pump, and the low-temperature heat exchanger to form a first thermal management circuit. The first thermal management component can be used to participate in the thermal management of the motor. The low-temperature heat exchanger can be arranged around the outdoor heat exchanger.

[0035] In some embodiments of the present application, the second thermal management component is connected to form a second thermal management loop through the fifth reversing valve, the second water pump and the battery loop. The second thermal management component may refer to the aforementioned battery thermal management component, which may be used to participate in the thermal management of the battery. The third reversing valve, the fourth reversing valve and the fifth reversing valve may all be three-way valves (TWV).

[0036] In some embodiments of the present application, the first thermal management loop and the second thermal management loop may be connected in series via a four-way valve, so that the waste heat between the motor and the battery can be fully utilized.

[0037] In the cooling mode, after the refrigerant is sucked in and compressed by the compressor, it passes through the indoor heat exchanger (not working), the second end of the first reversing valve, the first end of the first reversing valve, and the first thermal management component to reach the outdoor heat exchanger for heat exchange and condense into liquid refrigerant. The liquid refrigerant passes through the second throttle valve and the second pipeline of the regenerator to reach the third throttle valve and the evaporator for evaporative cooling, or reaches the fourth throttle valve and the second thermal management component to participate in battery thermal management, and then passes through the third end and the second end of the second reversing valve back to the first pipeline of the regenerator and is sucked in by the compressor again.

[0038] In the heating mode, after the refrigerant is sucked in and compressed by the compressor, it passes through the indoor heat exchanger for heat exchange, and then passes through the second end of the first reversing valve and the third end of the first reversing valve to reach the evaporator (not working) and the third throttle valve, or reaches the second thermal management component and the fourth throttle valve, and flows to the second pipeline of the regenerator. The refrigerant passing through the second pipeline flows through the second throttle valve to reach the outdoor heat exchanger to absorb heat, and then passes through the first thermal management component, the first end of the second reversing valve, and the second end of the second reversing valve back to the first pipeline of the regenerator, and is sucked in by the compressor again.

[0039] In addition, the heat pump system may further include an air side heater (APTC) disposed around the indoor heat exchanger.

[0040] Specifically, the control method of the heat pump system may include the following steps S101 to S102.

[0041] Step S101, determining the current operation mode of the heat pump system.

[0042] The operation mode of the heat pump system may include a cooling mode and a heating mode. The current operation mode refers to the operation mode that the heat pump system is currently in. The vehicle may adjust the operation mode of the heat pump system through the control instructions of the driver or according to the real-time status of the vehicle.

[0043] Step S102: Control the opening of the first throttle valve and the second throttle valve respectively according to the current operation mode.

[0044] In the embodiment of the present application, as described above, the circuit conditions in the regenerator are different in the cooling mode and the heating mode. In the case where the second throttle valve is not provided, in the cooling mode, heat exchange can be performed between the aforementioned first pipeline (i.e., the pipeline connected between the compressor and the second reversing valve inside the regenerator) and the second pipeline (i.e., the pipeline connected between the second throttle valve and the evaporator / second thermal management component inside the regenerator), and in the heating mode, the first pipeline and the second pipeline both become low-pressure circuits. In order to enable heat exchange in each operating mode, the opening of the first throttle valve and the second throttle valve can be controlled respectively according to the current operating mode, so that heat exchange is performed according to the original high and low pressure circuits in the cooling mode, and heat exchange is caused to occur by controlling the flow on both sides of the regenerator in the heating mode.

[0045] In an embodiment of the present application, a first throttle valve is arranged between the regenerator and the evaporator and / or the battery thermal management component, and a second throttle valve is arranged between the regenerator and the outdoor heat exchanger, and the opening of the first throttle valve and the second throttle valve are respectively controlled according to the current operating mode of the heat pump system. By controlling the opening of the throttle valves before and after the regenerator, heat exchange of the regenerator can be achieved in the heating mode, so that the high-pressure side can be cooled to a lower temperature, thereby improving the performance coefficient of the heat pump system.

[0046] In some embodiments of the present application, the opening of the first throttle valve and the second throttle valve are controlled separately according to the current operating mode, which may include: if the current operating mode is the cooling mode, the second throttle valve is controlled to be fully open, and the first throttle valve is throttled.

[0047] Specifically, the throttling control of the first throttle valve can be controlled according to the optimal pressure. The optimal pressure is the optimal exhaust pressure, which is the exhaust pressure value that makes the performance coefficient reach the maximum value. When the current operating mode is the cooling mode, the second throttle valve is fully opened to make it the same as the conventional pipeline. In this way, the throttle valve can be controlled for the cooling mode, so that the heat pump system can realize the heat exchange of the regenerator in the cooling mode.

[0048] In other embodiments of the present application, Figure 3 As shown, according to the current operation mode, the opening degree of the first throttle valve and the second throttle valve are controlled respectively, which may include: step S301 to step S302.

[0049] Step S301: if the current operation mode is the heating mode, then in the third throttle valve and the fourth throttle valve, a target throttle valve to be opened and a non-target throttle valve to be closed are respectively determined.

[0050] Specifically, when the current operation mode is the heating mode, some throttle valves in the third throttle valve and the fourth throttle valve may be selectively opened as required.

[0051] In some embodiments of the present application, in the third throttle valve and the fourth throttle valve, respectively determining the target throttle valve that needs to be opened and the non-target throttle valve that needs to be closed may include: obtaining the core mode of the heat pump system; and according to the core mode, determining the target throttle valve and the non-target throttle valve in the third throttle valve and the fourth throttle valve respectively.

[0052] The core mode represents the heating requirements of the passenger compartment and the battery. Specifically, the core mode may include a single core mode and a dual core mode.

[0053] The dual-core mode indicates that the passenger compartment has a heating demand, but the battery does not have a heating demand. In the dual-core mode, the third throttle valve can be used as the target throttle valve, and the fourth throttle valve can be used as the non-target throttle valve. In this case, Figure 2 As shown, the third throttle valve is opened, the indoor heat exchanger and the evaporator are connected in series to heat the passenger compartment together. The fourth throttle valve is closed, and the refrigerant no longer passes through the second thermal management component.

[0054] The single-cell mode indicates that the battery has a heating demand. In the single-cell mode, the fourth throttle valve can be used as the target throttle valve and the third throttle valve can be used as the non-target throttle valve. Figure 2As shown, the fourth throttle valve is opened, the indoor heat exchanger is connected in series with the second thermal management component, and the refrigerant can participate in the thermal management of the battery circuit through the second thermal management component. The third throttle valve is closed, and the refrigerant no longer passes through the evaporator.

[0055] By determining the open throttle valve through the core mode, the control of the throttle valve can be adapted to the heating requirements of the passenger compartment and the battery.

[0056] Step S302, controlling the non-target throttle valve to close, and performing throttling control on the second throttle valve and the target throttle valve.

[0057] Specifically, in some embodiments of the present application, if the target throttle valve is the third throttle valve, throttling control of the second throttle valve and the target throttle valve may include: obtaining the inlet temperature of the indoor heat exchanger and the first outlet temperature of the evaporator. When the first outlet temperature is greater than or equal to the first temperature threshold, and the inlet temperature is less than or equal to the second temperature threshold, the third throttle valve is controlled to be fully opened, and the opening of the second throttle valve is controlled according to the optimal pressure. When the first outlet temperature is less than the third temperature threshold, or the inlet temperature is greater than the fourth temperature threshold, the second throttle valve is controlled to be fully opened, and the opening of the third throttle valve is controlled according to the optimal pressure.

[0058] In the dual-core mode, the target throttle valve is the third throttle valve. At this time, the indoor heat exchanger and the evaporator are the main places where heat exchange occurs. The second throttle valve and the target throttle valve can be throttled in combination with the inlet temperature of the indoor heat exchanger and the first outlet temperature of the evaporator. The inlet temperature of the indoor heat exchanger represents the temperature of the refrigerant before the heat exchange occurs. The first outlet temperature of the evaporator represents the temperature after heat exchange between the indoor heat exchanger and the evaporator. If the first outlet temperature is greater than or equal to the first temperature threshold, and the inlet temperature is less than or equal to the second temperature threshold, it means that the heating capacity of the heat pump system is insufficient, and the heat regenerator needs to be used to absorb waste heat to improve the performance coefficient. At this time, the third throttle valve can be controlled to be fully open, and the opening of the second throttle valve can be controlled according to the optimal pressure, so that heat exchange can occur between the first pipeline and the second pipeline at the heat regenerator.

[0059] If the first outlet temperature is lower than the third temperature threshold, or the inlet temperature is higher than the fourth temperature threshold, it indicates that the heating capacity of the heat pump system is sufficient and no heat recovery is required. At this time, the second throttle valve can be controlled to be fully open, and the opening of the third throttle valve can be controlled according to the optimal pressure.

[0060] In this way, it is possible to determine whether the heat pump system has a heat recovery demand based on the temperature conditions of the refrigerant before passing through the passenger compartment and after passing through the evaporator, and switch between the heat recovery mode and conventional throttling control to improve the performance coefficient.

[0061] In some other embodiments of the present application, if the target throttle valve is the fourth throttle valve, the throttling control of the second throttle valve and the target throttle valve may include: obtaining the second outlet temperature and the inlet temperature of the indoor heat exchanger. When the second outlet temperature is greater than or equal to the fifth temperature threshold, and the inlet temperature is less than or equal to the sixth temperature threshold, the fourth throttle valve is controlled to be fully opened, and the opening of the second throttle valve is controlled according to the optimal pressure; when the second outlet temperature is less than the seventh temperature threshold, or the inlet temperature is greater than the eighth temperature threshold, the second throttle valve is controlled to be fully opened, and the opening of the fourth throttle valve is controlled according to the optimal pressure.

[0062] In the single-core mode, the target throttle valve is the fourth throttle valve. At this time, the indoor heat exchanger is the main place where heat exchange occurs. The second throttle valve and the target throttle valve can be throttled in combination with the inlet temperature of the indoor heat exchanger and the second outlet temperature of the indoor heat exchanger. The inlet temperature of the indoor heat exchanger represents the temperature of the refrigerant before the heat exchange occurs. The first outlet temperature of the indoor heat exchanger represents the temperature after heat exchange through the indoor heat exchanger. If the second outlet temperature is greater than or equal to the fifth temperature threshold, and the inlet temperature is less than or equal to the sixth temperature threshold, it means that the heating capacity of the heat pump system is insufficient, and the heat regenerator needs to be used to absorb waste heat to improve the performance coefficient. At this time, the fourth throttle valve can be controlled to be fully open, and the opening of the second throttle valve can be controlled according to the optimal pressure, so that heat exchange can occur between the first pipeline and the second pipeline at the heat regenerator.

[0063] If the second outlet temperature is lower than the seventh temperature threshold, or the inlet temperature is higher than the eighth temperature threshold, it indicates that the heating capacity of the heat pump system is sufficient and no heat recovery is required. At this time, the second throttle valve can be controlled to be fully open, and the opening of the fourth throttle valve can be controlled according to the optimal pressure.

[0064] In this way, it is possible to determine whether the heat pump system has a heat recovery demand based on the temperature conditions before and after the refrigerant passes through the indoor heat exchanger, and switch between the heat recovery mode and conventional throttling control to improve the performance coefficient.

[0065] Among them, the first temperature threshold, the second temperature threshold, the third temperature threshold, the fourth temperature threshold, the fifth temperature threshold, the sixth temperature threshold, the seventh temperature threshold, and the eighth temperature threshold can be set according to actual conditions. Among them, the first temperature threshold and the fifth temperature threshold can be set to 35°C, the second temperature threshold and the sixth temperature threshold can be set to 100°C, the third temperature threshold and the seventh temperature threshold can be set to 31°C, and the fourth temperature threshold and the eighth temperature threshold can be set to 150°C.

[0066] In this way, the third throttle valve or the fourth throttle valve and the second throttle valve can be throttle-controlled for the heating mode, so that the heat pump system can achieve heat exchange in the regenerator in the heating mode.

[0067] It should be noted that in the related art, the optimal refrigerant filling amount in the cooling mode and the heating mode is quite different, and the volume of the gas-liquid separator cannot be greatly increased due to the limitation of the manufacturing level, which will result in the volume of the gas-liquid separator being limited in the heat pump mode and unable to store excess refrigerant, or the refrigerant liquid level being high, which can easily lead to liquid shock in the compressor. At the same time, the appropriate filling amount in the heating mode is smaller than the optimal filling amount for cooling in the cooling mode, which will lead to problems such as high exhaust temperature.

[0068] The present application adds a second throttle valve and related pipelines of the second throttle valve on the front side of the heat pump system regenerator (integrated with the gas-liquid separator). The second throttle valve and related pipelines of the second throttle valve can be used to store excess refrigerant, thereby reducing the difference in optimal filling amounts in cooling mode and heating mode, lowering the liquid level inside the gas-liquid separator, and reducing the risk of liquid hammer.

[0069] It should be noted that, for the sake of simplicity of description, the aforementioned method embodiments are all expressed as a series of action combinations, but those skilled in the art should know that the present application is not limited to the described order of actions, because according to the present application, certain steps can be performed in other orders.

[0070] like Figure 4 Shown is a schematic structural diagram of a control device 400 for a heat pump system provided in an embodiment of the present application, wherein the control device 400 for the heat pump system is disposed on a vehicle.

[0071] Specifically, the control device 400 of the heat pump system may include:

[0072] A determination unit 401 is used to determine the current operation mode of the heat pump system;

[0073] The control unit 402 is used to control the opening of the first throttle valve and the second throttle valve respectively according to the current operation mode.

[0074] In some embodiments of the present application, the first throttle valve includes a third throttle valve connected to the evaporator and a fourth throttle valve connected to the battery thermal management component; the evaporator and the battery thermal management component are both connected to the indoor heat exchanger; the control unit 402 can be specifically used for: if the current operating mode is the heating mode, then in the third throttle valve and the fourth throttle valve, respectively determine the target throttle valve that needs to be opened and the non-target throttle valve that needs to be closed; control the non-target throttle valve to close, and perform throttling control on the second throttle valve and the target throttle valve.

[0075] In some embodiments of the present application, the control unit 402 may be specifically used to: obtain a core mode of the heat pump system, the core mode characterizing the heating requirements of the passenger compartment and the battery; and determine the target throttle valve and the non-target throttle valve in the third throttle valve and the fourth throttle valve, respectively, according to the core mode.

[0076] In some embodiments of the present application, if the target throttle valve is a third throttle valve, the control unit 402 can be specifically used to: obtain the inlet temperature of the indoor heat exchanger and the first outlet temperature of the evaporator; when the first outlet temperature is greater than or equal to the first temperature threshold, and the inlet temperature is less than or equal to the second temperature threshold, control the third throttle valve to be fully opened, and control the opening of the second throttle valve according to the optimal pressure; when the first outlet temperature is less than or equal to the third temperature threshold, or the inlet temperature is greater than or equal to the fourth temperature threshold, control the second throttle valve to be fully opened, and control the opening of the third throttle valve according to the optimal pressure.

[0077] In some embodiments of the present application, if the target throttle valve is the fourth throttle valve, the control unit 402 can be specifically used to: obtain the second outlet temperature and inlet temperature of the indoor heat exchanger; when the second outlet temperature is greater than or equal to the fifth temperature threshold, and the inlet temperature is less than or equal to the sixth temperature threshold, control the fourth throttle valve to be fully opened, and control the opening of the second throttle valve according to the optimal pressure; when the second outlet temperature is less than the seventh temperature threshold, or the inlet temperature is greater than the eighth temperature threshold, control the second throttle valve to be fully opened, and control the opening of the fourth throttle valve according to the optimal pressure.

[0078] In some embodiments of the present application, the control unit 402 may be specifically configured to: if the current operating mode is a cooling mode, control the second throttle valve to be fully opened, and perform throttling control on the first throttle valve.

[0079] It should be noted that, for the convenience and simplicity of description, the specific working process of the control device 400 of the heat pump system can be referred to Figures 1 to 3 The corresponding process of the method will not be repeated here.

[0080] like Figure 5 , which is a schematic diagram of a vehicle provided in an embodiment of the present application. Specifically, the vehicle 5 may include: a processor 50, a memory 51, and a computer program 52 stored in the memory 51 and executable on the processor 50, such as a control program for a heat pump system.

[0081] When the processor 50 executes the computer program 52, the steps in the above-mentioned control method embodiments of the heat pump system are implemented, for example: Figure 1Alternatively, when the processor 50 executes the computer program 52, the functions of each module / unit in the above-mentioned device embodiments are realized, for example Figure 4 The functions of the determination unit 401 and the control unit 402 are shown.

[0082] The computer program may be divided into one or more modules / units, which are stored in the memory 51 and executed by the processor 50 to complete the present application. The one or more modules / units may be a series of computer program instruction segments capable of completing specific functions, which are used to describe the execution process of the computer program in the vehicle.

[0083] For example, the computer program can be divided into: a determination unit and a control unit. The specific functions of each unit are as follows: a determination unit, used to determine the current operation mode of the heat pump system; a control unit, used to control the opening of the first throttle valve and the second throttle valve respectively according to the current operation mode.

[0084] The vehicle may include, but is not limited to, a processor 50 and a memory 51. Those skilled in the art will appreciate that Figure 5 It is only an example of a vehicle and does not constitute a limitation of the vehicle. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the vehicle may also include input and output devices, network access devices, buses, etc.

[0085] The processor 50 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), off-the-shelf programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0086] The memory 51 may be an internal storage unit of the vehicle, such as a hard disk or memory of the vehicle. The memory 51 may also be an external storage device of the vehicle, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the vehicle. Furthermore, the memory 51 may include both an internal storage unit and an external storage device of the vehicle. The memory 51 is used to store the computer program and other programs and data required by the vehicle. The memory 51 may also be used to temporarily store data that has been output or is to be output.

[0087] It should be noted that, for the convenience and brevity of description, the structure of the above-mentioned vehicle can also refer to the specific description of the structure in the method embodiment, which will not be repeated here.

[0088] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0089] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0090] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0091] In the embodiments provided in the present application, it should be understood that the disclosed devices / vehicles and methods can be implemented in other ways. For example, the device / vehicle embodiments described above are merely schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0092] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0093] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0094] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0095] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A control method for a heat pump system, characterized in that: The regenerator of the heat pump system is connected to the evaporator and / or the battery thermal management component for controlling the temperature of the passenger compartment through a first throttle valve; the regenerator is connected to the outdoor heat exchanger through a second throttle valve; The control method of the heat pump system comprises: determining a current operating mode of the heat pump system; According to the current operation mode, the opening degrees of the first throttle valve and the second throttle valve are respectively controlled.

2. The control method of the heat pump system according to claim 1, characterized in that: The first throttle valve includes a third throttle valve connected to the evaporator and a fourth throttle valve connected to the battery thermal management component; the evaporator and the battery thermal management component are both connected to the indoor heat exchanger; The step of controlling the opening of the first throttle valve and the second throttle valve respectively according to the current operation mode includes: If the current operation mode is the heating mode, then in the third throttle valve and the fourth throttle valve, a target throttle valve to be opened and a non-target throttle valve to be closed are respectively determined; The non-target throttle valve is controlled to be closed, and the second throttle valve and the target throttle valve are throttle-controlled.

3. The control method of the heat pump system according to claim 2, characterized in that: The step of respectively determining a target throttle valve to be opened and a non-target throttle valve to be closed in the third throttle valve and the fourth throttle valve includes: Obtaining a core mode of the heat pump system, wherein the core mode represents a heating demand of a passenger cabin and a battery; The target throttle valve and the non-target throttle valve are determined in the third throttle valve and the fourth throttle valve, respectively, according to the core mode.

4. The control method of the heat pump system according to claim 2, characterized in that: If the target throttle valve is the third throttle valve, the throttling control of the second throttle valve and the target throttle valve includes: Acquiring an inlet temperature of the indoor heat exchanger and a first outlet temperature of the evaporator; When the first outlet temperature is greater than or equal to a first temperature threshold and the inlet temperature is less than or equal to a second temperature threshold, controlling the third throttle valve to be fully opened, and controlling the opening of the second throttle valve according to an optimal pressure; When the first outlet temperature is less than or equal to a third temperature threshold, or the inlet temperature is greater than or equal to a fourth temperature threshold, the second throttle valve is controlled to be fully opened, and the opening degree of the third throttle valve is controlled according to an optimal pressure.

5. The control method of the heat pump system according to claim 2, characterized in that: If the target throttle valve is the fourth throttle valve, the throttling control of the second throttle valve and the target throttle valve includes: Acquiring a second outlet temperature and an inlet temperature of the indoor heat exchanger; When the second outlet temperature is greater than or equal to a fifth temperature threshold, and the inlet temperature is less than or equal to a sixth temperature threshold, controlling the fourth throttle valve to be fully opened, and controlling the opening of the second throttle valve according to an optimal pressure; When the second outlet temperature is lower than a seventh temperature threshold, or the inlet temperature is higher than an eighth temperature threshold, the second throttle valve is controlled to be fully opened, and the opening degree of the fourth throttle valve is controlled according to an optimal pressure.

6. The control method of the heat pump system according to any one of claims 1 to 5, characterized in that: The step of controlling the opening of the first throttle valve and the second throttle valve respectively according to the current operation mode includes: If the current operation mode is the cooling mode, the second throttle valve is controlled to be fully opened, and the first throttle valve is throttled.

7. A control device for a heat pump system, characterized in that: The regenerator of the heat pump system is connected to the evaporator and / or the battery thermal management component for controlling the temperature of the passenger compartment through a first throttle valve; the regenerator is connected to the outdoor heat exchanger through a second throttle valve; The control device of the heat pump system comprises: a determination unit, configured to determine a current operation mode of the heat pump system; A control unit is used to control the opening of the first throttle valve and the second throttle valve respectively according to the current operation mode.

8. A computer program product, characterized in that The invention comprises a computer program, and when the computer program is executed, the control method of the heat pump system according to any one of claims 1 to 6 is executed.

9. A vehicle comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: The vehicle includes a heat pump system, wherein a heat regenerator of the heat pump system is connected to an evaporator and / or a battery thermal management component for controlling the temperature of the passenger compartment via a first throttle valve; the heat regenerator is connected to an outdoor heat exchanger via a second throttle valve, and when the processor executes the computer program, the steps of the control method of the heat pump system as described in any one of claims 1 to 6 are implemented.

10. The vehicle according to claim 9, characterized in that The first throttle valve includes a third throttle valve connected to the evaporator and a fourth throttle valve connected to the battery thermal management component; the evaporator and the battery thermal management component are both connected to the indoor heat exchanger.

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