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

Abstract

The application is suitable for the technical field of thermal management, and provides a control method and device of a heat pump system, a computer program product and a vehicle. The heat pump system is connected between a regenerator and an evaporator for controlling the temperature of a passenger cabin and / or a battery thermal management assembly through a first throttling valve. The regenerator is connected to an outdoor heat exchanger through a second throttling valve. The control method of the heat pump system comprises: determining a current operation mode of the heat pump system; and performing opening degree control on the first throttling valve and the second throttling valve respectively according to the current operation mode. The embodiments of the application can improve the performance coefficient of the heat pump system.

Description

Technical Field

[0001] This 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 Technology

[0002] A vehicle's heat pump system is used to meet the vehicle's cooling and heating needs. To improve the Coefficient of Performance (COP), a regenerator is usually incorporated into the heat pump system. However, in most heat pump system architectures, the regenerator can only exchange heat during cooling; it cannot exchange heat during heating mode. This results in the high-pressure side not being able to achieve a large temperature glide during heating mode, leading to a decrease in the COP. Summary of the Invention

[0003] This application provides a control method, apparatus, 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 this application provides a control method for a heat pump system, wherein the heat pump system's regenerator is connected to an evaporator and / or a battery thermal management component for controlling the temperature of the passenger compartment via a first throttling valve; the regenerator is connected to an outdoor heat exchanger via a second throttling valve, and the control method includes: determining the current operating mode of the heat pump system; and controlling the opening degree of the first throttling valve and the second throttling valve respectively according to the current operating mode.

[0005] In the embodiments of this application, by setting a first throttling valve between the regenerator and the evaporator and / or the battery thermal management components, and setting a second throttling valve between the regenerator and the outdoor heat exchanger, and controlling the opening degree of the first and second throttling valves according to the current operating mode of the heat pump system, heat exchange of the regenerator can be achieved in the heating mode by controlling the opening degree of the throttling valves before and after the regenerator, 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 throttling valve includes a third throttling valve connected to the evaporator and a fourth throttling valve connected to the battery thermal management component; both the evaporator and the battery thermal management component are connected to an indoor heat exchanger; the step of controlling the opening degree of the first throttling valve and the second throttling valve according to the current operating mode includes: if the current operating mode is a heating mode, then determining, in the third throttling valve and the fourth throttling valve, a target throttling valve to be opened and a non-target throttling valve to be closed, respectively; controlling the non-target throttling valve to close, and performing throttling control on the second throttling valve and the target throttling valve. Thus, throttling valve control can be performed on the third or fourth throttling valve and the second throttling valve for the heating mode, enabling the heat pump system to achieve heat exchange of the regenerator in the heating mode.

[0007] In some embodiments of the first aspect, determining the target throttling valve to be opened and the non-target throttling valve to be closed in the third and fourth throttling valves respectively includes: acquiring the 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 throttling valve and the non-target throttling valve in the third and fourth throttling valves respectively based on the core mode. Determining the throttling valve to be opened by using the core mode allows the control of the throttling valve to be adapted to the heating requirements of the passenger compartment and the battery.

[0008] In some embodiments of the first aspect, if the target throttling valve is a third throttling valve, then the throttling control of the second throttling valve and the target throttling valve includes: acquiring 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 a first temperature threshold and the inlet temperature is less than or equal to a second temperature threshold, controlling the third throttling valve to be fully open, and controlling the opening degree of the second throttling valve according to the 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, controlling the second throttling valve to be fully open, and controlling the opening degree of the third throttling valve according to the optimal pressure. In this way, based on the temperature of the refrigerant before passing through the passenger compartment and after passing through the evaporator, it is possible to determine whether the heat pump system has a reheating requirement, and switch between reheating mode and conventional throttling control to improve the coefficient of performance.

[0009] In some embodiments of the first aspect, if the target throttling valve is a fourth throttling valve, then the throttling control of the second throttling valve and the target throttling valve includes: acquiring the second outlet temperature and 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 throttling valve to be fully open, and controlling the opening degree of the second throttling valve according to the optimal pressure; when the second outlet temperature is less than a seventh temperature threshold or the inlet temperature is greater than an eighth temperature threshold, controlling the second throttling valve to be fully open, and controlling the opening degree of the fourth throttling valve according to the optimal pressure. In this way, based on the temperature of the refrigerant before and after passing through the indoor heat exchanger, it can be determined whether the heat pump system has a regenerative demand, and the system can switch between regenerative mode and conventional throttling control to improve the coefficient of performance.

[0010] In some embodiments of the first aspect, controlling the opening degree of the first throttling valve and the second throttling valve according to the current operating mode includes: if the current operating mode is a cooling mode, controlling the second throttling valve to be fully open and controlling the first throttling valve to throttle. In this way, throttling valve control can be performed for the cooling mode, allowing the heat pump system to achieve heat exchange of the regenerator in the cooling mode.

[0011] A second aspect of this application provides a control device for a heat pump system. The heat pump system's regenerator 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 regenerator is connected to an outdoor heat exchanger via a second throttle valve; the control device for the heat pump system includes: a determining unit for determining the current operating mode of the heat pump system; and a control unit for controlling the opening degree of the first throttle valve and the second throttle valve respectively according to the current operating mode.

[0012] A third aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the control method for the heat pump system described above.

[0013] A fourth aspect of this application provides a vehicle including a memory, a processor, and a computer program stored in the memory and executable on the processor. The vehicle includes a heat pump system, wherein a 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 regenerator is connected to an outdoor heat exchanger via a second throttle valve, and the processor, when executing the computer program, implements the steps of the control method for the heat pump system described above.

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

[0015] The fifth aspect of this application provides a computer program product that, when run on a vehicle, causes the vehicle to execute the control method of the heat pump system described above.

[0016] The beneficial effects of the second to fifth aspects of the embodiments described above can be referred to the description of the first aspect of the embodiments, and will not be repeated here. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram illustrating the implementation process of a control method for a heat pump system provided in an embodiment of this application;

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

[0020] Figure 3 This is a schematic diagram illustrating the specific implementation process of controlling the opening degree of the first throttle valve and the second throttle valve respectively, provided in an embodiment of this application.

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

[0022] Figure 5 This is a schematic diagram of the vehicle structure provided in the embodiments of this application. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are protected by this application.

[0024] In most heat pump system architectures, during cooling mode, the circuit connecting the regenerator to the outdoor heat exchanger is under high pressure, while the circuit connecting it to the compressor is under low pressure, allowing heat exchange between the high and low pressure circuits of the regenerator. During heating mode, both the circuit connecting the regenerator to the outdoor heat exchanger and the circuit connecting it to the compressor become low-pressure circuits, preventing heat exchange between them. This results in the high-pressure side not being able to achieve a significant temperature glide during heating, leading to a decrease in the coefficient of performance (COP).

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

[0026] To illustrate the technical solution of this application, specific embodiments are described below.

[0027] Figure 1 This illustration shows a schematic flowchart of a control method for a heat pump system according to an embodiment of this application. This method can be applied to heat pump systems. The heat pump system can be installed in a vehicle, which can refer to a hybrid electric vehicle, a pure electric vehicle, a gasoline-powered vehicle, or other types of vehicles; this application does not impose any limitations on this.

[0028] In embodiments of this 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, absorbing the waste heat of the liquid refrigerant. The regenerator of the heat pump system is connected to the evaporator and / or battery thermal management components used to control the temperature of the passenger compartment via a first throttle valve, and the regenerator is connected to the outdoor heat exchanger via a second throttle valve.

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

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

[0031] In some specific implementations, the heat pump system's regenerator and gas-liquid separator can be designed as a single unit, thereby reducing structural complexity and improving the vehicle's integration.

[0032] For some specific implementation methods, please refer to Figure 2 ( Figure 2(The arrows indicate the flow direction in heating mode). The outdoor heat exchanger (OHX) can be connected to the first thermal management assembly (Chiller1). The first thermal management assembly 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 assembly (Chiller2). The first thermal management assembly 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 pipe of the regenerator, and the third end of the second reversing valve is connected to the evaporator and the second thermal management assembly. The first pipe is connected to the indoor heat exchanger via the compressor. The evaporator is connected to the second pipe of the regenerator via the third throttle valve (EXV3), and the second thermal management assembly is connected to the second pipe of the regenerator via the fourth throttle valve (EXV4). The second pipe is connected to the outdoor heat exchanger via the second throttle valve (EXV2).

[0033] Both the first and second directional valves mentioned above can be electro-pneumatic valves (EPV).

[0034] In some embodiments of this application, the aforementioned first thermal management component can also be connected to the motor circuit via a third reversing valve, a fourth reversing valve, a first water pump, and a cryogenic 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 cryogenic heat exchanger can be installed around the outdoor heat exchanger.

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

[0036] In some embodiments of this application, the first thermal management circuit and the second thermal management circuit can 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 cooling mode, the refrigerant is drawn into and compressed by the compressor, then passes through the indoor heat exchanger (not operating), 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, condensing into liquid refrigerant. The liquid refrigerant then passes through the second throttle valve, the second pipeline of the regenerator, and the third throttle valve to reach the evaporator for evaporative cooling, or reaches the fourth throttle valve to participate in battery thermal management with the second thermal management component. Subsequently, it returns to the first pipeline of the regenerator through the third and second ends of the second reversing valve, and is drawn back into the compressor.

[0038] In heating mode, the refrigerant is drawn into and compressed by the compressor, then undergoes heat exchange in the indoor heat exchanger. It then flows through the second and third ends of the first reversing valve to the evaporator (not operating) and the third throttle valve, or to the second thermal management component and the fourth throttle valve, before flowing into the second pipe of the regenerator. The refrigerant in the second pipe flows through the second throttle valve to the outdoor heat exchanger to absorb heat, then returns to the first pipe of the regenerator via the first thermal management component, the first end of the second reversing valve, and the second end of the second reversing valve, where it is drawn back into the compressor.

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

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

[0041] Step S101: Determine the current operating mode of the heat pump system.

[0042] The operating modes of a heat pump system can include cooling mode and heating mode. The current operating mode refers to the current operating mode of the heat pump system. The vehicle can adjust the operating mode of the heat pump system through control commands from the driver and passengers or according to the vehicle's real-time status.

[0043] Step S102: According to the current operating mode, control the opening degree of the first throttle valve and the second throttle valve respectively.

[0044] In the embodiments of this application, as described above, the circuit configuration within the regenerator differs between cooling and heating modes. Without the second throttling valve, in cooling mode, heat exchange can occur between the aforementioned first pipe (i.e., the pipe connecting the compressor and the second reversing valve inside the regenerator) and the second pipe (i.e., the pipe connecting the second throttling valve and the evaporator / second thermal management component inside the regenerator). In heating mode, both the first and second pipes become low-pressure circuits. To enable heat exchange in all operating modes, the opening degree of the first and second throttling valves can be controlled according to the current operating mode. This allows heat exchange to occur in cooling mode according to the original high and low pressure circuits, while in heating mode, heat exchange is facilitated by flow control on both sides of the regenerator.

[0045] In the embodiments of this application, by setting a first throttling valve between the regenerator and the evaporator and / or the battery thermal management components, and setting a second throttling valve between the regenerator and the outdoor heat exchanger, and controlling the opening degree of the first and second throttling valves according to the current operating mode of the heat pump system, heat exchange of the regenerator can be achieved in the heating mode by controlling the opening degree of the throttling valves before and after the regenerator, 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 this application, the opening degree of the first throttle valve and the second throttle valve is controlled according to the current operating mode. This may include: if the current operating mode is the cooling mode, then the second throttle valve is fully opened and the first throttle valve is throttled.

[0047] Specifically, the first throttling valve can be controlled based on the optimal pressure. The optimal pressure, or optimal exhaust pressure, is the exhaust pressure that maximizes the coefficient of performance. When the current operating mode is cooling mode, the second throttling valve is fully open, making it the same as the conventional piping. In this way, throttling valve control can be applied to cooling mode, allowing the heat pump system to achieve heat exchange with the regenerator even in cooling mode.

[0048] In other embodiments of this application, such as Figure 3 As shown, according to the current operating mode, the opening degree of the first throttle valve and the second throttle valve are controlled respectively, which may include steps S301 to S302.

[0049] Step S301: If the current operating mode is heating mode, then in the third throttle valve and the fourth throttle valve, determine the target throttle valve to be opened and the non-target throttle valve to be closed, respectively.

[0050] Specifically, when the current operating mode is heating mode, some throttle valves can be selectively opened in the third and fourth throttle valves as needed.

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

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

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

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

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

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

[0057] Specifically, in some embodiments of this application, if the target throttling valve is a third throttling valve, then throttling control of the second throttling valve and the target throttling valve may include: acquiring 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 a first temperature threshold and the inlet temperature is less than or equal to a second temperature threshold, the third throttling valve is fully opened, and the opening degree of the second throttling 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 a fourth temperature threshold, the second throttling valve is fully opened, and the opening degree of the third throttling valve is controlled according to the optimal pressure.

[0058] In dual-core mode, the target throttling valve is the third throttling valve. In this mode, the indoor heat exchanger and evaporator are the primary sites of heat exchange. The second throttling valve and the target throttling valve can be controlled by combining 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 refrigerant temperature before heat exchange occurs. The first outlet temperature of the evaporator represents the temperature after heat exchange through the indoor heat exchanger and 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 indicates that the heat pump system's heating capacity is insufficient. It is necessary to utilize the regenerator to absorb waste heat and improve the coefficient of performance. In this case, the third throttling valve can be fully opened, and the opening of the second throttling valve can be controlled according to the optimal pressure, allowing heat exchange between the first and second pipes at the regenerator.

[0059] If the first outlet temperature is less than the third temperature threshold, or the inlet temperature is greater than the fourth temperature threshold, it indicates that the heat pump system has sufficient heating capacity and does not require heat recovery. In this case, the second throttle valve can be fully opened, and the opening degree of the third throttle valve can be controlled according to the optimal pressure.

[0060] In this way, based on the temperature of the refrigerant before passing through the passenger compartment and after passing through the evaporator, it can be determined whether the heat pump system has a need for reheating, and the system can switch between reheating mode and conventional throttling control to improve the coefficient of performance.

[0061] In some other embodiments of this application, if the target throttling valve is a fourth throttling valve, then throttling control of the second throttling valve and the target throttling valve may include: acquiring the second outlet temperature and the 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, the fourth throttling valve is fully opened, and the opening degree of the second throttling valve is controlled according to the optimal pressure; when the second outlet temperature is less than a seventh temperature threshold or the inlet temperature is greater than an eighth temperature threshold, the second throttling valve is fully opened, and the opening degree of the fourth throttling valve is controlled according to the optimal pressure.

[0062] In single-core mode, the target throttling valve is the fourth throttling valve. At this time, the indoor heat exchanger is the primary site of heat exchange. Throttling control of the second and target throttling valves can be achieved by combining the inlet and second outlet temperatures of the indoor heat exchanger. The inlet temperature of the indoor heat exchanger represents the refrigerant temperature before heat exchange occurs. The first outlet temperature of the indoor heat exchanger represents the temperature after heat exchange. 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 indicates that the heat pump system's heating capacity is insufficient. It is necessary to utilize the regenerator to absorb waste heat and improve the coefficient of performance. In this case, the fourth throttling valve can be fully opened, and the opening of the second throttling valve can be controlled according to the optimal pressure, allowing heat exchange to occur between the first and second pipes at the regenerator.

[0063] If the second outlet temperature is less than the seventh temperature threshold, or the inlet temperature is greater than the eighth temperature threshold, it indicates that the heat pump system has sufficient heating capacity and does not require heat recovery. In this case, the second throttle valve can be fully opened, and the opening degree of the fourth throttle valve can be controlled according to the optimal pressure.

[0064] In this way, based on the temperature of the refrigerant before and after passing through the indoor heat exchanger, it can be determined whether the heat pump system has a need for heat recovery, and the system can switch between heat recovery mode and conventional throttling control to improve the coefficient of performance.

[0065] The first, second, third, fourth, fifth, sixth, seventh, and eighth temperature thresholds can all be set according to actual conditions. Specifically, the first and fifth temperature thresholds can be set to 35℃, the second and sixth temperature thresholds can be set to 100℃, the third and seventh temperature thresholds can be set to 31℃, and the fourth and eighth temperature thresholds can be set to 150℃.

[0066] In this way, the third or fourth throttling valve, as well as the second throttling 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.

[0067] It should be noted that in the relevant technologies, the optimal refrigerant charge differs significantly between cooling and heating modes. However, the volume of the gas-liquid separator is limited by manufacturing capabilities and cannot be significantly increased. This results in the gas-liquid separator having a limited volume in cooling mode but not in heat pump mode, making it unable to store excess refrigerant or causing the refrigerant level to be too high, which can easily lead to compressor liquid slugging. At the same time, the optimal charge in heating mode is relatively small compared to the optimal charge in cooling mode, which can lead to problems such as higher exhaust temperature.

[0068] This application adds a second throttle valve and related piping to the front side of the heat pump system regenerator (which is integrated with the gas-liquid separator). The second throttle valve and related piping can be used to store excess refrigerant, reducing the difference in the optimal charge amount between cooling and heating modes, lowering the liquid level inside the gas-liquid separator, and reducing the risk of liquid slugging.

[0069] It should be noted that, for the sake of simplicity, the aforementioned method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, because according to this application, some steps can be performed in other orders.

[0070] like Figure 4 The diagram shown is a structural schematic of a heat pump system control device 400 provided in an embodiment of this application. The heat pump system control device 400 is disposed on a vehicle.

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

[0072] Determining unit 401 is used to determine the current operating mode of the heat pump system;

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

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

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

[0076] In some embodiments of this application, if the target throttling valve is a third throttling valve, the control unit 402 may 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 a first temperature threshold and the inlet temperature is less than or equal to a second temperature threshold, control the third throttling valve to be fully open, and control the opening degree of the second throttling valve according to the 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, control the second throttling valve to be fully open, and control the opening degree of the third throttling valve according to the optimal pressure.

[0077] In some embodiments of this application, if the target throttling valve is a fourth throttling valve, the control unit 402 may be specifically used to: obtain the second outlet temperature and the 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, control the fourth throttling valve to be fully open, and control the opening degree of the second throttling valve according to the optimal pressure; when the second outlet temperature is less than a seventh temperature threshold or the inlet temperature is greater than an eighth temperature threshold, control the second throttling valve to be fully open, and control the opening degree of the fourth throttling valve according to the optimal pressure.

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

[0079] It should be noted that, for the sake of convenience and brevity, the specific working process of the control device 400 of the above-mentioned heat pump system can be found in the following reference: Figures 1 to 3 The corresponding process of the method will not be described in detail here.

[0080] like Figure 5 The diagram shown is a schematic representation of a vehicle according to an embodiment of this 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, it implements the steps in the control method embodiments of the various heat pump systems described above, for example... Figure 1The steps S101 to S102 are shown. Alternatively, when the processor 50 executes the computer program 52, it implements the functions of each module / unit in the above-described device embodiments, for example... Figure 4 The functions of the determination unit 401 and the control unit 402 shown are illustrated.

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

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

[0084] The vehicle may include, but is not limited to, a processor 50 and a memory 51. Those skilled in the art will understand that... Figure 5 This is merely an example of a vehicle and does not constitute a limitation on the vehicle. It may include more or fewer components than illustrated, or combine certain components, or different components. For example, the vehicle may also include input / 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 (DSPs), application-specific integrated circuits (ASICs), 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.

[0086] The memory 51 can be an internal storage unit of the vehicle, such as a hard drive or RAM. Alternatively, the memory 51 can be an external storage device of the vehicle, such as a plug-in hard drive, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card. Furthermore, the memory 51 can include both internal and external storage devices. The memory 51 is used to store the computer program and other programs and data required by the vehicle. The memory 51 can also be used to temporarily store data that has been output or will be output.

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

[0088] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to 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 embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0089] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0090] Those skilled in the art will recognize that the units and algorithm steps of the various examples 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 implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for various specific applications, but such implementations should not be considered beyond the scope of this application.

[0091] In the embodiments provided in this 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 illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

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

[0093] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0094] If the integrated module / unit is implemented as 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, all or part of the processes in the methods of the above embodiments can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content included in the computer-readable medium can be appropriately added or removed 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 electrical carrier signals and telecommunication signals.

[0095] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A control method of a heat pump system, characterized by, The heat pump system further comprises a first throttling valve connected between the regenerator and an evaporator for controlling temperature of a passenger cabin and / or a battery thermal management component; The evaporator is connected with an indoor heat exchanger, and the regenerator is connected with an outdoor heat exchanger through a second throttling valve; and the control method of the heat pump system comprises: determining a current operation mode of the heat pump system; controlling opening degrees of the first throttling valve and the second throttling valve according to the current operation mode; The control of the opening degrees of the first throttling valve and the second throttling valve according to the current operation mode comprises: if the current operation mode is a heating mode and a target throttling valve to be opened is the third throttling valve, obtaining 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 throttling valve to be fully opened and controlling the opening degree of the second throttling valve according to optimal pressure; and 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, controlling the second throttling valve to be fully opened and controlling the opening degree of the third throttling valve according to optimal pressure.

2. The control method of a heat pump system according to claim 1, characterized by, The first throttling valve further comprises a fourth throttling valve connected with the battery thermal management component; and the battery thermal management component is connected with the indoor heat exchanger; The control of the opening degrees of the first throttling valve and the second throttling valve according to the current operation mode comprises: if the current operation mode is the heating mode, determining a target throttling valve to be opened and a non-target throttling valve to be closed in the third throttling valve and the fourth throttling valve, respectively; controlling the non-target throttling valve to be closed and controlling the second throttling valve and the target throttling valve to be throttled.

3. The control method of a heat pump system according to claim 2, characterized by, The determination of the target throttling valve to be opened and the non-target throttling valve to be closed in the third throttling valve and the fourth throttling valve, respectively, comprises: obtaining a core mode of the heat pump system, the core mode representing heating demands of the passenger cabin and the battery; determining the target throttling valve and the non-target throttling valve in the third throttling valve and the fourth throttling valve, respectively, according to the core mode.

4. The control method of a heat pump system according to claim 2, characterized by, If the target throttling valve is the fourth throttling valve, the throttling control of the second throttling valve and the target throttling valve comprises: obtaining 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 throttling valve to be fully opened and controlling the opening degree of the second throttling valve according to optimal pressure; and when the second outlet temperature is less than a seventh temperature threshold or the inlet temperature is greater than an eighth temperature threshold, controlling the second throttling valve to be fully opened and controlling the opening degree of the fourth throttling valve according to optimal pressure.

5. The control method of a heat pump system according to any one of claims 1 to 4, characterized in that, The control of the opening degrees of the first throttling valve and the second throttling valve according to the current operation mode comprises: If the current operation mode is the cooling mode, the second throttling valve is controlled to be fully opened, and the first throttling valve is throttled.

6. A control device of a heat pump system, characterized by comprising: The heat pump system further comprises a first throttling valve connected between the regenerator and an evaporator for controlling the temperature of the passenger compartment and / or a battery thermal management component, wherein the first throttling valve comprises a third throttling valve connected to the evaporator; The evaporator is connected to an indoor heat exchanger, and the regenerator is connected to an outdoor heat exchanger through a second throttling valve. The control device of the heat pump system comprises: a determining unit configured to determine a current operation mode of the heat pump system; a control unit configured to control the opening degrees of the first throttling valve and the second throttling valve according to the current operation mode; 7. A computer program product, characterised in that, If the current operation mode is the heating mode and the third throttling valve is the target throttling valve to be opened, the control unit is configured to obtain 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, the control unit is configured to control the third throttling valve to be fully opened and control the opening degree of the second throttling valve according to the 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 control unit is configured to control the second throttling valve to be fully opened and control the opening degree of the third throttling valve according to the optimal pressure.

8. A vehicle comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, The computer program is run to execute the control method of the heat pump system according to any one of claims 1 to 5.

9. The vehicle of claim 8, wherein, The vehicle comprises a heat pump system, wherein a regenerator of the heat pump system is connected to an evaporator for controlling the temperature of the passenger compartment and / or a battery thermal management component through a first throttling valve, and the regenerator is connected to an outdoor heat exchanger through a second throttling valve, and the first throttling valve comprises a third throttling valve connected to the evaporator; the evaporator is connected to an indoor heat exchanger; and the processor executes the computer program to implement the steps of the control method of the heat pump system according to any one of claims 1 to 5. The first throttling valve further comprises a fourth throttling valve connected to the battery thermal management component; and the battery thermal management component is connected to the indoor heat exchanger.

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