Air supply control method and device and electronic equipment

Abstract

The invention provides an air supply control method and device and electronic equipment which are applied to a heat pump system of a vehicle. First air supply control parameters are obtained, wherein the first air supply control parameters comprise the vehicle exterior environment temperature, the first heat pump pressure and the compressor return air superheat degree. And secondly, under the condition that the first air supply control parameter meets the air supply starting condition, it is determined that the heat pump system starts the air supply control mode. Thirdly, first valve control parameters are obtained, and the first valve control parameters comprise the vehicle exterior environment temperature and the second heat pump pressure; and then, the initial opening degree of a first valve is determined based on the first valve control parameters, and the first valve is used for controlling the refrigerant circulation amount in the air supply loop. According to the method, the use efficiency of the compressor of the heat pump system can be effectively improved, the service life of the compressor of the heat pump system can be effectively prolonged, heating of the heat pump system in the low-temperature environment is faster and more comfortable, and the driving experience is improved.

Description

Technical Field

[0001] The present application belongs to the field of vehicle-mounted thermal energy control, and in particular, relates to an air replenishment control method, device and electronic equipment suitable for an automobile heat pump system. Background Art

[0002] In the current on-board heat pump control system, by setting up an air supply circuit, the flow of the compressor can be increased in the low-temperature heat pump mode through the air supply circuit, thereby increasing the work done by the compressor. It is possible to meet the heating needs of the passenger compartment and the battery under low-temperature conditions without relying on heating components such as PTC. The heat pump system requires precise air supply control. If the air supply control is improper, the refrigerant in the air supply circuit is prone to incomplete evaporation, causing the compressor to inhale liquid and increase the risk of compressor damage. Therefore, the on-board heat pump air supply control system and air supply control method is a topic worthy of study. Summary of the invention

[0003] The present application provides an air supply control method, device and electronic device. The air supply control method and system provided in the present application are based on the existing air supply enthalpy increase technology of the vehicle compressor, and use a numerical air supply air opening and closing judgment method and an air supply circuit control method, which can effectively improve the compressor efficiency and service life of the automobile heat pump system, making the automobile heat pump system heat faster and more comfortable in a low temperature environment to improve the driving experience.

[0004] In the first aspect, a gas replenishment control method is proposed, which is applied to a heat pump system of a vehicle. First, a first gas replenishment control parameter is obtained, wherein the first gas replenishment control parameter includes an outside environment temperature, a first heat pump pressure, and a compressor return air superheat, wherein the first heat pump pressure is the refrigerant pressure at the compressor inlet. Secondly, when the first gas replenishment control parameter satisfies the gas replenishment start condition, it is determined that the heat pump system starts the gas replenishment control mode, wherein the heat pump system includes a compressor, a main circuit, and a gas replenishment circuit. Thirdly, a first valve control parameter is obtained, wherein the first valve control parameter includes the outside environment temperature and the second heat pump pressure, wherein the second heat pump pressure is the refrigerant pressure at the compressor exhaust port. Finally, the initial opening of the first valve is determined based on the first valve control parameter, wherein the first valve is used to control the refrigerant flow rate in the gas replenishment circuit. This method realizes that the heat pump system starts the gas replenishment control mode in real time according to the system operation status by improving the condition judgment for starting the compressor gas replenishment control, and accurately takes the initial opening of the expansion valve of the gas replenishment circuit when the compressor gas replenishment control is turned on.

[0005] In some possible embodiments, the air supplement start-up conditions include that the ambient temperature outside the vehicle is less than or equal to a temperature threshold, the compressor return air superheat is greater than or equal to a superheat threshold, and the first heat pump pressure is greater than or equal to a first pressure threshold.

[0006] In some possible embodiments, the first air supplement control parameter also includes passenger compartment heat load and / or motor waste heat. When the first air supplement control parameter includes the passenger compartment heat load, the air supplement start condition also includes that the passenger compartment heat load is greater than or equal to a heat load threshold; when the first air supplement control parameter includes the motor waste heat, the air supplement start condition also includes that the heat generation power of the motor waste heat is greater than or equal to a heat generation power threshold.

[0007] As mentioned above, the initial opening of the first valve is determined based on the first valve control parameter. In some possible instances, the determination method includes determining the initial opening of the first valve based on the first valve control parameter, the temperature threshold and the second pressure threshold, wherein the second pressure threshold is the threshold corresponding to the second heat pump pressure, the initial opening is positively correlated with the second heat pump pressure, and the initial opening is negatively correlated with the external ambient temperature.

[0008] In some possible embodiments, after determining the initial opening of the first valve based on the first valve control parameter, the gas supplement control method provided in the present application further includes:

[0009] When it is determined that the heat pump system is in the air supplement control mode, a second valve control parameter is obtained at a first time interval, wherein the second valve control parameter includes a refrigerant superheat of the air supplement circuit, a return air superheat of the compressor, and a pressure of the first heat pump. Subsequently, a target opening of the first valve is determined based on the second valve control parameter and a current opening, wherein the current opening is a current valve opening value of the first valve.

[0010] Alternatively, in some possible embodiments, after determining the initial opening of the first valve based on the first valve control parameter, the gas supplement control method provided by the present application further includes:

[0011] When it is determined that the heat pump system is in the air supplement control mode, a third valve control parameter is obtained at a second time interval, wherein the third valve control parameter includes exhaust superheat, which is the difference between the compressor exhaust temperature and the saturation temperature of the compressor exhaust pressure. Subsequently, a target opening of the first valve is determined based on the third valve control parameter, and the current opening is the current valve opening value of the first valve.

[0012] In some possible embodiments, after determining that the heat pump system starts the air supply control mode, the air supply control method further includes obtaining a second air supply control parameter at a third time interval, wherein the second air supply control parameter includes parameter data describing the external environment temperature or the heat load of the passenger compartment. When the second air supply control parameter does not meet the air supply closing condition, it is determined to maintain the air supply control mode of the heat pump system, or, when the second air supply control parameter meets the air supply closing condition, it is determined to close the air supply control mode of the heat pump system. The air supply closing condition includes that the difference between the external environment temperature and the temperature threshold is greater than the first threshold, or the difference between the heat load threshold and the heat load of the passenger compartment is less than the second threshold.

[0013] In the second aspect, a gas replenishment control device is proposed, which is applied to the heat pump system of a vehicle, including an acquisition module for acquiring a first gas replenishment control parameter, wherein the first gas replenishment control parameter includes the ambient temperature outside the vehicle, the first heat pump pressure and the compressor return air superheat, and the first heat pump pressure is the refrigerant pressure at the compressor inlet. The device also includes a processing module for determining that the heat pump system starts the gas replenishment control mode when the first gas replenishment control parameter meets the gas replenishment start condition, wherein the heat pump system includes a compressor, a main circuit and a gas replenishment circuit. The device also includes a sending module for sending an instruction to the compressor to indicate whether to turn on or off the gas replenishment control, and also for sending an instruction to the first valve to indicate whether the first valve adjusts the valve opening. The gas replenishment control device provided in the present application realizes that the heat pump system turns on the gas replenishment control mode in real time according to the system operation status by improving the condition judgment for turning on the compressor gas replenishment control, and accurately takes the initial opening of the expansion valve of the gas replenishment circuit when the compressor gas replenishment control is turned on.

[0014] First, the acquisition module acquires the first air supply control parameter, which includes the ambient temperature outside the vehicle, the first heat pump pressure and the compressor return air superheat, and the first heat pump pressure is the refrigerant pressure at the compressor inlet. Secondly, when the first air supply control parameter meets the air supply start-up condition, the processing module determines that the heat pump system starts the air supply control mode, wherein the heat pump system includes a compressor, a main circuit and an air supply circuit. Thirdly, the acquisition module acquires the first valve control parameter, which includes the ambient temperature outside the vehicle and the second heat pump pressure, and the second heat pump pressure is the refrigerant pressure at the compressor exhaust port. Finally, the processing module determines the initial opening of the first valve based on the first valve control parameter, and the first valve is used to control the refrigerant flow rate in the air supply circuit.

[0015] In some possible embodiments, the air supplement start-up conditions include that the ambient temperature outside the vehicle is less than or equal to a temperature threshold, the compressor return air superheat is greater than or equal to a superheat threshold, and the first heat pump pressure is greater than or equal to a first pressure threshold.

[0016] In some possible embodiments, the first air supplement control parameter also includes passenger compartment heat load and / or motor waste heat. When the first air supplement control parameter includes the passenger compartment heat load, the air supplement start condition also includes that the passenger compartment heat load is greater than or equal to a heat load threshold; when the first air supplement control parameter includes the motor waste heat, the air supplement start condition also includes that the heat generation power of the motor waste heat is greater than or equal to a heat generation power threshold.

[0017] The processing module mentioned above determines the initial opening of the first valve based on the first valve control parameter. In some possible instances, the determination method of the processing module includes determining the initial opening of the first valve based on the first valve control parameter, the temperature threshold and the second pressure threshold, wherein the second pressure threshold is the threshold corresponding to the second heat pump pressure, the initial opening is positively correlated with the second heat pump pressure, and the initial opening is negatively correlated with the external ambient temperature.

[0018] In some possible embodiments, after the processing module determines the initial opening of the first valve based on the first valve control parameter, the gas supplement control method provided in the present application further includes:

[0019] When it is determined that the heat pump system is in the air supplement control mode, the acquisition module acquires a second valve control parameter at a first time interval, wherein the second valve control parameter includes the refrigerant superheat of the air supplement circuit, the compressor return air superheat, and the first heat pump pressure. Subsequently, the processing module determines a target opening of the first valve based on the second valve control parameter and the current opening, wherein the current opening is the current valve opening value of the first valve.

[0020] Alternatively, in some possible embodiments, after the processing module determines the initial opening of the first valve based on the first valve control parameter, the gas supplement control method provided by the present application further includes:

[0021] When it is determined that the heat pump system is in the air supplement control mode, the acquisition module acquires a third valve control parameter at a second time interval, wherein the third valve control parameter includes exhaust superheat, which is the difference between the compressor exhaust temperature and the saturation temperature of the compressor exhaust pressure. Subsequently, the processing module determines the target opening of the first valve based on the third valve control parameter, wherein the current opening is the current valve opening value of the first valve.

[0022] In some possible embodiments, after determining that the heat pump system starts the air supply control mode, the air supply control method further includes, an acquisition module acquiring a second air supply control parameter at a third time interval, wherein the second air supply control parameter includes parameter data describing the ambient temperature outside the vehicle or the heat load of the passenger compartment. In the case where the second air supply control parameter does not meet the air supply closing condition, the processing module determines to maintain the air supply control mode of the heat pump system, or, in the case where the second air supply control parameter meets the air supply closing condition, the processing module determines to close the air supply control mode of the heat pump system. The air supply closing condition includes that the difference between the ambient temperature outside the vehicle and the temperature threshold is greater than a first threshold, or that the difference between the heat load threshold and the heat load of the passenger compartment is less than a second threshold.

[0023] In a third aspect, an electronic device is provided, comprising a memory and a processor, wherein the memory stores instructions, and when the processor runs the instructions in the memory, the method of any embodiment of the first aspect can be implemented.

[0024] In a fourth aspect, a heat pump system is provided, comprising the electronic device described in the third aspect.

[0025] In a fifth aspect, a vehicle is proposed, comprising the air replenishment control device described in the second aspect, the electronic device described in the third aspect, and the heat pump system described in the fourth aspect.

[0026] In a sixth aspect, a computer storage medium is proposed, comprising a plurality of instructions, which, when executed by an electronic device, can implement the method required by any embodiment of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0028] Figure 1 It is a schematic diagram of a heat pump air replenishment control system provided by the present application;

[0029] Figure 2 It is a flow chart of a method for controlling the start of air replenishment in a heat pump system provided in the present application;

[0030] Figure 3 It is a flow chart of a method for determining that a heat pump system starts an air supply control mode provided by the present application;

[0031] Figure 4 It is a flow chart of a first valve opening control method of a first air supply circuit provided by the present application;

[0032] Figure 5It is a flow chart of a second method for controlling the opening degree of the first valve of a gas supplementation circuit provided by the present application;

[0033] Figure 6 A schematic diagram of a heat pump system air supply control device provided in this application;

[0034] Figure 7 A schematic diagram of the structure of an electronic device provided in this application. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described through the implementation method with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0036] In the description of this application, unless otherwise clearly defined, words such as "setting" should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meaning of the above words in this application based on the specific content of the technical solution.

[0037] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific embodiments", or "some examples" means that the specific features or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] In order to facilitate the understanding of the present invention by persons skilled in the relevant art, the application scenarios to which the present application is applicable are briefly described in combination with embodiments and drawings.

[0039] See also Figure 1 , Figure 1 This is a schematic diagram of a heat pump air replenishment control system provided in this application. Figure 1 The heat pump air supply control system in the illustrated embodiment includes 19 components and 4 refrigerant transmission circuits, and the 4 refrigerant transmission circuits are respectively a main circuit, an air supply circuit, an external condensation circuit, and an internal evaporation circuit.

[0040] First, the main circuit is introduced, which includes the compressor 101, the first temperature and pressure sensor 102, the second solenoid valve 106, the in-vehicle condenser 107, the first heat exchanger 108, the first expansion valve 109, the second heat exchanger 110, the fourth solenoid valve 116, the gas-liquid separator 117 and the third temperature and pressure sensor 118. Secondly, the air supply circuit is introduced, which includes the compressor 101, the first temperature and pressure sensor 102, the second solenoid valve 106, the in-vehicle condenser 107, the second expansion valve 111, the first heat exchanger 108, the fourth temperature and pressure sensor 119 and the third solenoid valve 112. The external condensation circuit is introduced again, which is a one-way refrigerant circuit formed by connecting the first temperature and pressure sensor 102, the first solenoid valve 103, the external condenser 104, the one-way valve 105 and the heat transfer channel between the second heat exchanger 110 and the fourth solenoid valve 116 in sequence. Finally, the in-vehicle evaporation circuit is introduced. The in-vehicle evaporation circuit is a one-way refrigerant circuit formed by connecting the heat transfer channel between the second heat exchanger 110 and the fourth solenoid valve 116, the third expansion valve 113, the evaporator 114, the second temperature and pressure sensor 115, and the heat transfer channel between the fourth solenoid valve 116 and the gas-liquid separator 117 in sequence.

[0041] During the operation of the heat pump air supply control, the refrigerant circulates in the main circuit and the air supply circuit, and performs heat exchange through the in-vehicle condenser 107, the first heat exchanger 108, and the second heat exchanger 110. During the operation of the refrigeration control, the refrigerant flows in the external condensation circuit and the internal evaporation circuit, and performs heat exchange through the external condenser 104 and the evaporator 114.

[0042] Depend on Figure 1 It can be seen that during the operation of the heat pump air supply control, the refrigerant circulating in the main circuit and the air supply circuit will undergo the following phase change process, including:

[0043] First, the first refrigerant discharged from the exhaust port of the compressor 101 passes through the first temperature and pressure sensor 102 and the second solenoid valve 106 to reach the in-vehicle condenser 107. The first refrigerant is converted into the second refrigerant after heat exchange with the air in the vehicle through the in-vehicle condenser 107, wherein the first refrigerant is a high-temperature and high-pressure gaseous refrigerant, and the second refrigerant is a medium-temperature and high-pressure liquid refrigerant. Secondly, the second refrigerant is divided into the main refrigerant and the supplementary air refrigerant, which pass through the first heat exchange channel and the second heat exchange channel of the first heat exchanger 108 respectively, wherein the main refrigerant is directly connected to the main circuit through the first heat exchange channel, and the supplementary air refrigerant is connected to the supplementary air circuit through the second heat exchange channel after passing through the second expansion valve 111. Subsequently, the supplementary air refrigerant is converted into the third refrigerant through the first heat exchanger 108 through the heat exchange with the main refrigerant, and the third refrigerant flows back to the air inlet of the compressor 101 through the third solenoid valve 112, wherein the third refrigerant is a low-temperature and medium-pressure gaseous refrigerant. Afterwards, after passing through the first heat exchanger 108, the main refrigerant is throttled by the first expansion valve 109, and is heat-exchanged with the automobile motor in the second heat exchanger 110 to be converted into the fourth refrigerant, which is a high-temperature gaseous / liquid two-phase refrigerant. Finally, the fourth refrigerant enters the gas-liquid separator 117 after passing through the fourth solenoid valve 116, and finally flows back to the air inlet of the compressor 101 through the third temperature and pressure sensor 118.

[0044] At present, the existing technology is not precise and rigorous enough in controlling the flow rate of the air replenishment circuit. In the case of improper air replenishment control, the refrigerant in the air replenishment circuit is prone to incomplete evaporation, which in turn causes the compressor to inhale liquid and increase the risk of compressor damage. At the same time, since the air replenishment control consumes more energy during operation, opening the air replenishment control too frequently will lead to unnecessary waste of energy. The following introduces the existing technologies related to the present invention and their shortcomings.

[0045] The first method is to monitor the refrigerant circuit through temperature and pressure sensors. The advantage of this method is that the intake temperature and exhaust temperature of the compressor can be monitored through the cooperation of pressure sensors and temperature sensors, and the refrigerant circulation flow rate can be controlled according to the monitoring results, so as to achieve reliable and stable operation of the air conditioner in high temperature and cold areas; at the same time, the pressure sensor can also obtain the system pressure in real time, and judge whether the system refrigerant is leaking or whether the system is blocked. The disadvantage of this method is that it only uses pressure sensors and temperature sensors to monitor the intake temperature and exhaust temperature of the air supply compressor. Due to the lack of monitoring data, it is unable to fully guarantee the safety of the compressor and extend the service life of the compressor during the process of opening, running and closing the air supply control.

[0046] The second method is to control the opening of the air supply circuit by controlling the electronic expansion valve. The advantage of this method is to reasonably determine the initial opening of the electronic expansion valve in the air supply circuit, so that the system can quickly reach stability. However, in the process of heat pump air supply control. The disadvantage of this method is that the air supply circuit still requires the fine control of the opening of the electronic expansion valve to fully ensure the safety of the compressor and extend the service life of the compressor during the process of opening, running and closing the air supply control.

[0047] In order to solve the above problems, the present application proposes an air supply control method, including an air supply control opening method applied to a vehicle heat pump system, an air supply circuit first valve target opening control method and an air supply control closing method. The air supply control method provided by the present application, by setting multiple temperature and pressure sensors (the same as the temperature and pressure sensors in the previous text) in the main circuit and the air supply circuit of the vehicle heat pump system and setting an electronic expansion valve in the air supply circuit, by improving the condition judgment for starting the compressor air supply control, the heat pump system can turn on the air supply control mode in real time according to the system operation status. When the compressor air supply control is turned on, the initial opening of the expansion valve of the air supply circuit is accurately taken, and the current opening of the expansion valve of the air supply circuit is accurately calculated by coupling multiple operating parameters, so as to realize the precise control of the expansion valve of the air supply circuit, prevent the compressor liquid compression from endangering the safety of system operation, and ensure the safety of the compressor and extend its service life.

[0048] See also Figure 2 The flow chart of the air supply control opening method of the heat pump system provided in this application is as follows. The air supply control opening method applied to the vehicle heat pump system provided in this embodiment can be used to operate in Figure 1 The heat pump air supply control system in the embodiment shown has the following specific steps:

[0049] S101: Obtain a first gas replenishment control parameter.

[0050] The first air replenishment control parameter includes the vehicle exterior ambient temperature Tw, the first heat pump pressure PL1, and the compressor return air superheat SL1. The first heat pump pressure PL1 is the parameter data describing the refrigerant pressure at the compressor inlet; the vehicle exterior ambient temperature Tw is the parameter data collected by the temperature sensor located outside the vehicle; the first heat pump pressure PL1 and the compressor return air superheat SL1 are Figure 1 In the embodiment shown, the parameter data collected by the third temperature and pressure sensor 118. After the heat pump system starts working, the domain controller obtains the vehicle external environment temperature Tw, the first heat pump pressure PL1 and the compressor return air superheat SL1 collected by the above-mentioned vehicle-mounted sensors.

[0051] In some possible embodiments, the first air supplement control parameter further includes any one or more of passenger compartment heat load H, motor waste heat or heater power P. The passenger compartment heat load H is parameter data collected by a temperature sensor disposed in the vehicle, and the passenger compartment heat load H is the effective heat value of the heat pump required to generate when the vehicle interior temperature reaches the set temperature of the vehicle air conditioner; the motor waste heat or heater power P is parameter data for indicating the heating power of the vehicle heat source.

[0052] S102: When the first air replenishment control parameter satisfies an air replenishment start condition, determining that the heat pump system starts an air replenishment control mode.

[0053] The air supply start-up conditions include that the outside ambient temperature Tw is less than or equal to the temperature threshold Twset, the compressor return air superheat SL1 is greater than or equal to the superheat threshold SL1set, and the first heat pump pressure PL1 is greater than or equal to the first pressure threshold PL1set.

[0054] In some possible embodiments, when the first supplementary air control parameter includes the passenger compartment heat load H, the supplementary air start condition also includes that the passenger compartment heat load H is greater than or equal to the heat load threshold Hset. In some possible embodiments, when the first supplementary air control parameter includes one or more of the motor residual heat and the heater power, the supplementary air start condition also includes that the heat generation power P of the motor residual heat and / or the heater power is greater than or equal to the heat generation power threshold Pm. In some possible embodiments, when the first supplementary air control parameter includes the heater power, the supplementary air start condition also includes that the heat generation power P of the heater power is greater than or equal to the heat generation power threshold Pm. In some possible embodiments, when the first supplementary air control parameter includes the motor residual heat and the heater power, the supplementary air start condition also includes that the heat generation power P of the motor residual heat and the heater power is greater than or equal to the heat generation power threshold Pm.

[0055] After the heat pump system determines to start the air supply control mode of the heat pump system, the domain controller instructs the compressor to enter the air supply control state and opens the air inlet connected to the air supply circuit and the compressor. Figure 1 In the embodiment shown, the second expansion valve 111 is opened to start the air supply circuit. It can be understood that the first valve corresponds to Figure 1 The second expansion valve 111 in the illustrated embodiment. Next, the method for confirming the initial opening K1 of the first valve after the heat pump system enters the air supply control is introduced in steps S103 to S104.

[0056] S103: Obtain a first valve control parameter.

[0057] The first valve control parameter includes the outside environment temperature Tw and the second heat pump pressure PH, where the second heat pump pressure is the refrigerant pressure at the compressor exhaust port. Figure 1In the illustrated embodiment, the domain controller obtains the refrigerant high-pressure signal at the compressor exhaust port through the first temperature and pressure sensor 102, and uses the average system high-pressure value of the system high-pressure signal at each time interval as the system high-pressure PH.

[0058] S104: Determine an initial opening of the first valve based on the first valve control parameter.

[0059] The initial opening K1 of the first valve is determined according to the first valve control parameter, the temperature threshold Twset and the second pressure threshold PH1. The first valve is used to control the refrigerant flow in the air supply circuit. The initial opening K1 is positively correlated with the second heat pump pressure PH and negatively correlated with the external ambient temperature Twset.

[0060] The formula (1) for determining the initial opening K1 of the first valve is as follows:

[0061] K1=K0+a*(PH-PH1)-b*(Tw-Twset) (1)

[0062] Among them, K0 is the basic opening of the first valve, which is usually set to 0; the second pressure threshold PH1 is the threshold corresponding to the second heat pump pressure PH; the temperature threshold Twset includes a constant value set by the heating capacity of the vehicle heat pump; a and b are constant parameters in the formula, which are obtained through the standard settings of the specific vehicle.

[0063] After determining the initial opening K1 of the first valve, the domain controller instructs the valve opening of the first valve to be adjusted from the basic opening K0 to the initial opening K1, and maintains the valve opening at the initial opening K1 for a period of time.

[0064] To facilitate the understanding of step S102 by relevant persons in the art, a method for determining whether a heat pump system starts a gas replenishment control mode provided by the present application is specifically described below with an embodiment. It can be understood that the method for determining whether a heat pump system starts a gas replenishment control mode provided by the present embodiment corresponds to the specific operation in step S102.

[0065] See also Figure 3 , Figure 3 A flow chart of a method for determining whether to start the air supply control mode of a heat pump system provided in this application. By sequentially judging whether to start the air supply control, the method provided in this embodiment can accurately judge when the heat pump system needs to enter the air supply control, which can not only save energy loss but also effectively control the service life of the compressor, wherein the heat pump system includes a compressor, a main circuit and an air supply circuit. The specific method steps are as follows:

[0066] S201: Determine whether the ambient temperature outside the vehicle reaches a temperature threshold.

[0067] After the vehicle heat pump system is turned on, the domain controller collects the outside temperature signal of the outside temperature sensor in real time, and takes the average temperature value of the outside temperature signal as the outside ambient temperature Tw at intervals. When the outside ambient temperature Tw is less than or equal to the temperature threshold Twset, it enters the next step of S202, otherwise it exits the judgment process of determining whether the heat pump system starts the air supply control mode. In low-temperature environments, the heating capacity of the heat pump system is insufficient. When the outside ambient temperature Tw is lower than a certain value, it enters the air supply control, which can greatly improve the low-temperature heating capacity and expand the working temperature range of the heat pump.

[0068] The formula (2) used to determine whether the ambient temperature outside the vehicle reaches the temperature threshold is as follows:

[0069] Tw≤Twset (2)

[0070] The temperature threshold Twset includes a constant value set by the heating capacity of the vehicle heat pump. Normally, the temperature threshold Twset is usually in the range of -40°C to -20°C.

[0071] S202: When the first air supplementation control parameter includes the thermal load of the passenger compartment, determining whether the thermal load of the passenger compartment reaches a thermal load threshold.

[0072] If the first air supply control parameter does not include the passenger compartment heat load, directly proceed to the next step of determination in S203. If the first air supply control parameter includes the passenger compartment heat load, then:

[0073] After the vehicle heat pump system is turned on, the domain controller collects the in-vehicle temperature signal of the in-vehicle temperature sensor in real time, and calculates the passenger compartment heat load H based on the in-vehicle temperature signal at intervals. If the passenger compartment heat load H is greater than or equal to the heat load threshold Hset, it enters the next step of S203, otherwise it exits the judgment process of determining whether the heat pump system starts the air supply control mode. This step considers whether the automobile heat pump can meet the heating demand of the passenger compartment without entering the air supply control. If it cannot meet the heating demand, the air supply control needs to be turned on.

[0074] The formula (3) used to determine whether the passenger compartment heat load reaches the heat load threshold is as follows:

[0075] H≥Hset (3)

[0076] The passenger compartment heat load H includes the effective heat generation value of the heat pump required for the vehicle interior temperature to reach the set temperature of the vehicle air conditioner, and the heat load threshold Hset includes a constant value set by the vehicle heat pump heating capacity.

[0077] In other possible embodiments, the contents of the steps described in S202 and S203 may be interchanged in execution order, which is not limited here.

[0078] S203: When the first air supplement control parameter includes one or more of motor residual heat and heater power, determining whether the heat generation power reaches a heat generation power threshold.

[0079] If the first air-injection control parameter does not include any one of the motor residual heat or the heater power, directly proceed to the next step of determination in S204. If the first air-injection control parameter includes one or more of the motor residual heat or the heater power, then:

[0080] After the vehicle heat pump system is turned on, the domain controller collects the heat generation power data of other heat generation devices in the vehicle in real time, and calculates the heat generation power P based on the heat generation data including the motor waste heat or heater power at intervals. When the heat generation power P is greater than or equal to the heat generation power threshold Pm, it enters the next step of S204, otherwise it exits the judgment process of determining whether the heat pump system starts the air supply control mode. Since the return air superheat degree is low when the automobile heat pump system works in a low temperature environment, in order to avoid the compressor liquid compression phenomenon caused by entering the air supply control mode, the return air superheat degree S1Lset is set to control the occurrence of the compressor liquid compression phenomenon.

[0081] The formula (4) used to determine whether the heat generation power reaches the heat generation power threshold is as follows:

[0082] P≥Pm (4)

[0083] The heat generation power threshold value Pm includes a constant value set by the heating capacity of the vehicle heat pump.

[0084] In other possible embodiments, the contents of the steps described in S202 and S203 may be interchanged in execution order, which is not limited here.

[0085] S204: Determine whether the compressor return air superheat reaches the superheat threshold.

[0086] After the vehicle heat pump system is turned on, the domain controller collects reference data in real time. Figure 1 The compressor return air superheat signal of the third temperature and pressure sensor 118 in the illustrated embodiment, wherein the return air superheat is represented by the difference between the intake air temperature of the compressor in the main circuit and the saturation temperature corresponding to the intake port pressure, and the average superheat value of the compressor return air superheat signal is taken as the compressor return air superheat SL1 at every interval, and when the compressor return air superheat SL1 is greater than or equal to the compressor superheat threshold SLset, the process directly enters step S205, otherwise the process exits the judgment process for determining whether the heat pump system starts the air supply control mode.

[0087] The formula (5) used to determine whether the compressor return air superheat reaches the superheat threshold is as follows:

[0088] SL1≥SL1set (5)

[0089] The compressor return air superheat SL1 includes a relevant value for detecting the main circuit temperature, and the superheat threshold SLset includes a constant value set by the heating capacity of the vehicle heat pump.

[0090] S205: Determine whether the first heat pump pressure reaches a first pressure threshold.

[0091] After the vehicle heat pump system is turned on, the domain controller collects reference data in real time. Figure 1 The refrigerant low pressure signal of the main circuit of the third temperature and pressure sensor 118 in the illustrated embodiment uses the average low pressure value of the system low pressure signal as the first heat pump pressure PL1 at intervals. When the first heat pump pressure PL1 is less than or equal to the first pressure threshold PLset, the air supply control mode of the heat pump system is turned on, otherwise the judgment process for determining whether the heat pump system turns on the air supply control mode is exited. Since the heat pump system will cause the air supply circuit to take away a part of the refrigerant material when entering the air supply control mode, in order to avoid the compressor suction pressure being too low, this step sets a refrigerant low pressure protection value PL1set for the heat pump system.

[0092] The formula (6) for determining whether the first heat pump pressure reaches the first pressure threshold is as follows:

[0093] PL1≥PL1set (6)

[0094] The first heat pump pressure PL1 includes low-pressure parameter data describing the refrigerant in the main circuit at the compressor inlet, and the first pressure threshold PLset includes a constant value set by the heating capacity of the vehicle heat pump.

[0095] The air supply control method proposed in the present application includes an air supply control opening method for a vehicle heat pump system, an air supply circuit first valve target opening control method, and an air supply control closing method. The previous article introduced an air supply control opening method for a heat pump system, and the following article introduces an air supply circuit first valve target opening control method. This method calculates and controls the valve opening of the first valve located in the air supply circuit in real time, and controls the refrigerant pressure and temperature in the air supply circuit by controlling the flow rate of the refrigerant in the air supply circuit. It can effectively ensure that the refrigerant pressure at the compressor inlet is accurately controlled to protect the stable operation of the compressor and extend the service life of the compressor.

[0096] After the heat pump system enters the air supply control mode and adjusts the target opening of the first valve to the initial opening K1, the target opening K3 of the first valve is calculated and determined in real time according to the actual solution requirements. This application provides two specific embodiments to introduce the method of determining the target opening of the first valve.

[0097] See also Figure 4 , Figure 4 This is a flow chart of the first method for controlling the opening of the first valve of the air supply circuit provided in this application. The method for controlling the opening of the first valve of the air supply circuit provided in this embodiment is a method for controlling the flow rate of the refrigerant in the air supply circuit by adjusting the opening of the first valve in the air supply circuit when the vehicle heat pump system is in the air supply control mode. It can be applied to Figure 1 The heat pump air supply control system in the embodiment shown. It can be understood that Figure 1 The second expansion valve 111 in the embodiment corresponds to the first valve in this embodiment. The specific steps are as follows:

[0098] S301: When it is determined that the heat pump system is in an air supply control mode, obtaining a second valve control parameter at a first time interval.

[0099] This step is used to collect relevant parameters for calculating the target opening of the first valve. In some possible embodiments, the first time interval can be set to tens of seconds or 1 minute according to the actual working requirements of the heat pump system, which is not limited here.

[0100] The second valve control parameters include the air supply circuit refrigerant superheat SL2, the compressor return air superheat SL1 and the first heat pump pressure PL1. Figure 1 In the embodiment shown, the domain controller obtains the refrigerant superheat signal at the air inlet where the compressor and the air supply circuit are connected through the fourth temperature and pressure sensor 119. The intake superheat is expressed as the difference between the intake temperature of the compressor in the air supply circuit and the saturation temperature corresponding to the inlet pressure. At every period of time, the average value of the refrigerant superheat signal of the air supply circuit is used as the refrigerant superheat SL2 of the air supply circuit.

[0101] S302: Determine a target opening of the first valve based on the second valve control parameter.

[0102] The formula (7) for determining the target opening K3 of the first valve is as follows:

[0103] K3=K2+c*(SL2-SL2set)+Δ1+Δ2 (7)

[0104] Among them, c is a constant parameter in the formula, the current opening K2 is the current valve opening value of the first valve, the target intake superheat SL2set is the threshold value corresponding to the refrigerant superheat SL2 of the air supply circuit, and the target superheat SL2set is a constant value obtained through the standard setting of the specific vehicle.

[0105] Δ1 is the return air superheat correction value, and Δ2 is the first heat pump pressure correction value. For the method of determining the values ​​of Δ1 and Δ2, please refer to the calculation method set in the following table. Among them, Table 1 is a comparison table of the calculation method of the return air superheat correction value Δ1, and Table 2 is a comparison table of the calculation method of the first heat pump pressure correction value Δ2.

[0106] Table 1 Comparison table of calculation methods for return air superheat correction value Δ1

[0107] δ1=SL1-SL1m δ1≥8 2<δ1<8 δ1≤2 δ1≤-2 △1 +(SL1-SL1m) +(SL1-SL1m) / 2 0 -(SL1-SL1m) / 2

[0108] It can be seen that the compressor return air superheat SL1 is the real-time parameter data obtained by collecting signals from the temperature and pressure sensors, and the compressor target return air superheat SL1m is a constant value calibrated by the vehicle heat pump system.

[0109] Table 2 Comparison table of calculation methods for the first heat pump pressure correction value Δ2

[0110] δ2=PL1-PL1m δ2 ≥ 0.2 0<δ2<0.2 δ2≤0 △2 +4 0 -4

[0111] It can be seen that the first heat pump pressure PL1 is real-time parameter data obtained by collecting signals from the temperature and pressure sensor, and the target heat pump pressure PL1m is a constant value calibrated by the vehicle heat pump system.

[0112] After determining the target opening of the first target valve, the domain controller instructs the first valve to adjust the current valve opening to the target opening.

[0113] See also Figure 5 , Figure 5 This is a flow chart of the second method for controlling the opening of the first valve of the air supply circuit provided by the present application. The method for controlling the opening of the first valve of the air supply circuit provided by this embodiment is a method for controlling the flow rate of the refrigerant in the air supply circuit by adjusting the opening of the first valve in the air supply circuit when the vehicle heat pump system is in the air supply control mode. It can be applied to Figure 1 The heat pump air supply control system in the embodiment shown. It can be understood that Figure 1 The second expansion valve 111 in the embodiment corresponds to the first valve in this embodiment. The specific steps are as follows:

[0114] S401: When it is determined that the heat pump system is in the air supply control mode, a third valve control parameter is acquired at a second time interval.

[0115] This step is used to collect and calculate the relevant parameters of the first valve target opening. In some possible embodiments, the second time interval can be set to tens of seconds or 1 minute according to the actual working requirements of the heat pump system, which is not limited here. The third valve control parameter includes the exhaust superheat SH, which is the difference between the compressor exhaust temperature and the saturation temperature corresponding to the compressor exhaust pressure. Figure 1 In the illustrated embodiment, the domain controller obtains the refrigerant superheat signal at the exhaust port where the compressor is connected to the main circuit through the first temperature and pressure sensor 102, and takes the average value of the refrigerant superheat signal at the exhaust port as the exhaust superheat SH at each time interval.

[0116] S402: Determine a target opening of the first valve based on the third valve control parameter.

[0117] The formula (8) for determining the target opening degree K3 of the first valve is as follows:

[0118] K3=K2+d*(SH-SHm)+Δ1+Δ2 (8)

[0119] Among them, d is a constant parameter in the formula, the current opening K2 is the current valve opening value of the first valve, the target exhaust superheat SHm is the threshold value corresponding to the exhaust superheat SH, and the target exhaust superheat SHm is a constant value obtained through the standard setting of the specific vehicle.

[0120] Δ1 is the return air superheat correction value, and Δ2 is the first heat pump pressure correction value. For the method of determining the values ​​of Δ1 and Δ2, please refer to the calculation method set in Table 1 and Table 2 in the previous text, which will not be repeated here.

[0121] After determining the target opening of the first target valve, the domain controller instructs the first valve to adjust the current valve opening to the target opening.

[0122] pass Figure 3 and Figure 4 The first valve opening control method described in these two embodiments can be used for Figure 1 The heat pump air supply control system in the illustrated embodiment determines the current opening of the first valve in real time, and controls the flow rate of the refrigerant in the air supply circuit by calculating the valve opening of the first valve in real time, so as to achieve control of the refrigerant pressure and temperature in the air supply circuit, which can effectively ensure that the pressure of the compressor at the connection with the air inlet can be accurately controlled to protect the stable operation of the compressor and extend its service life.

[0123] The air supply control method proposed in this application also includes an air supply control shutdown method for a vehicle heat pump system. Next, a method for determining how to shut down the air supply control mode after the heat pump system turns on the air supply control mode is introduced. This method improves the judgment of the conditions for turning on / off the compressor air supply control, and enables the heat pump system to turn on / off the air supply control mode in real time according to the system operating conditions, thereby ensuring the safety of the compressor and extending its service life.

[0124] First, the second air supply control parameter is obtained at a third time interval. The second air supply control parameter includes parameter data describing the outside environment temperature Tw and the passenger compartment heat load H. This step is used to determine the relevant parameters of the air supply control mode closing condition. In some possible embodiments, the third time interval can be set to a duration of tens of seconds or 1 minute according to the actual working requirements of the heat pump system, which is not limited here.

[0125] Secondly, when the second air supplement control parameter does not satisfy the air supplement closing condition, it is determined to maintain the air supplement control mode of the heat pump system.

[0126] Determine whether the air supply closing condition is met at preset time intervals. When the difference between the external ambient temperature Tw and the temperature threshold Twset is not greater than the first threshold ΔT, or when the difference between the heat load threshold Hset and the passenger compartment heat load H is not less than the second threshold ΔH, determine that the heat pump system maintains the air supply control mode.

[0127] The formulas (9) and (10) used to determine the heat pump system to maintain the air supply control mode are as follows:

[0128] Twset<Tw≤Twset+ΔT (9)

[0129] H≥Hset-ΔH (10)

[0130] The first threshold ΔT is a constant value set by the heating capacity of the vehicle heat pump. In general, the first threshold is set to 10 degrees Celsius. The second threshold ΔH is also a constant value set by the heating capacity of the vehicle heat pump.

[0131] Finally, when the second air supplement control parameter satisfies the air supplement closing condition, it is determined that the heat pump system closes the air supplement control mode.

[0132] Determine whether the air supply closing condition is met at preset time intervals. When the difference between the external ambient temperature Tw and the temperature threshold Twset is greater than the first threshold ΔT, or when the difference between the heat load threshold Hset and the passenger compartment heat load H is less than the second threshold ΔH, determine that the heat pump system closes the air supply control mode.

[0133] The formulas (11) and (12) used to determine the heat pump system closed air supply control mode are as follows:

[0134] Tw>Twset+ΔT (11)

[0135] H<Hset-ΔH (12)

[0136] The first threshold ΔT is a constant value set by the heating capacity of the vehicle heat pump. In general, the first threshold is set to 10 degrees Celsius. The second threshold ΔH is also a constant value set by the heating capacity of the vehicle heat pump.

[0137] After the heat pump system determines to shut down the air supply control mode of the heat pump system, the domain controller instructs the compressor to exit the air supply control state and closes the air inlet connected to the air supply circuit and the compressor. Figure 1 The second expansion valve 111 in the illustrated embodiment is closed, ie, the opening degree of the first valve is set to zero.

[0138] See also Figure 6 , Figure 6 Schematic diagram of a heat pump system air supply control device provided in this application. The heat pump system air supply control device 600 provided in this embodiment is used to implement Figure 1 The heat pump system air supply control system shown in the figure and the heat pump system air supply control method and the heat pump air supply shutdown method shown in steps S101-S104, steps S201-S205, steps S301-S302 and steps S401-S402. The heat pump system air supply control device 600 provided in this embodiment includes an acquisition module 610, a processing module 620 and a sending module 630.

[0139] The acquisition module 610 is used to acquire the first air supply control parameter, which includes the ambient temperature outside the vehicle, the first heat pump pressure, and the compressor return air superheat, and the first heat pump pressure is the refrigerant pressure at the compressor inlet. Further, the acquisition module 610 is also used to acquire the first valve control parameter, which includes the ambient temperature outside the vehicle and the second heat pump pressure, and the second heat pump pressure is the refrigerant pressure at the compressor exhaust port. Further, the acquisition module 610 is also used to acquire the second valve control parameter at a first time interval, and the second valve control parameter includes the refrigerant superheat of the air supply circuit, the compressor return air superheat, and the first heat pump pressure. Further, the acquisition module 610 is also used to acquire the third valve control parameter at a second time interval, and the third valve control parameter includes the exhaust superheat, and the exhaust superheat is the difference between the compressor exhaust temperature and the saturation temperature of the compressor exhaust pressure. Further, the acquisition module 610 is also used to acquire the second air supply control parameter at a third time interval, and the second air supply control parameter includes parameter data describing the ambient temperature outside the vehicle and the heat load of the passenger compartment.

[0140] It can be understood that the acquisition module 610 can be used to implement the contents described in the heat pump system air supply control method and the heat pump air supply shutdown method shown in steps S101-S104, steps S201-S205, steps S301-S302 and steps S401-S402.

[0141] The processing module 620 is used to determine that the heat pump system starts the air supply control mode when the first air supply control parameter meets the air supply start condition, wherein the heat pump system includes a compressor, a main circuit and an air supply circuit. Further, the processing module 620 is also used to determine the initial opening of the first valve based on the first valve control parameter, and the first valve is used to control the refrigerant flow in the air supply circuit. Further, the processing module 620 is also used to determine the target opening of the first valve based on the second valve control parameter and the current opening, and the current opening is the current valve opening value of the first valve. Further, the processing module 620 is also used to determine the target opening of the first valve based on the third valve control parameter, and the current opening is the current valve opening value of the first valve. Further, the processing module 620 is also used to determine to maintain the air supply control mode of the heat pump system when the second air supply control parameter does not meet the air supply closing condition; or, when the second air supply control parameter meets the air supply closing condition, determine to close the air supply control mode of the heat pump system.

[0142] It can be understood that the processing module 620 can be used to implement the contents described in the heat pump system air supply control method and the heat pump air supply shutdown method shown in steps S101-S104, steps S201-S205, steps S301-S302 and steps S401-S402.

[0143] The sending module 630 is used to send an instruction to the compressor to instruct the compressor to turn on or off the air supply control, and is also used to send an instruction to the first valve to instruct the first valve to adjust the valve opening.

[0144] It can be understood that the sending module 630 can be used to implement the contents described in the heat pump system air supply control method and the heat pump air supply shutdown method shown in steps S101-S104, steps S201-S205, steps S301-S302 and steps S401-S402.

[0145] See also Figure 7 , Figure 77 is a schematic diagram of the structure of an electronic device provided in the present application. The electronic device 700 shown in the present application includes: one or more processors 710, a communication interface 730, a memory 740 and a bus 750. Among them, the processor 710, the communication interface 730, and the memory 740 can be connected through the bus 750. The electronic device described in this embodiment can correspond to the domain controller for implementing the heat pump air supply control method and device mentioned in the above embodiment.

[0146] The processor 710 includes one or more general-purpose processors, wherein the general-purpose processor can be any type of device capable of processing electronic instructions, including a central processing unit (CPU), a microprocessor, a microcontroller, and an ASIC (Application Specific Integrated Circuit), etc. For example, the processor 710 can also be a central processing unit or a graphics processing unit (GPU), and the processor 710 can also be a single-core processor or a multi-core processor. The processor 710 can be a combination of a CPU and a hardware chip. The above-mentioned hardware chip can be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The above-mentioned PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof. The processor 710 can also be implemented by a logic device with built-in processing logic alone, such as an FPGA or a digital signal processor (DSP). The processor 710 executes various types of digital storage instructions, such as software or firmware programs stored in the memory 740, which enables the electronic device to provide a wide variety of services. For example, the processor 710 can execute programs or process data to perform at least a part of the method discussed herein.

[0147] The processor 710 can be used to execute the contents described in the heat pump system air supply control method and the heat pump air supply shutdown method shown in steps S101 to S104, steps S201 to S205, steps S301 to S302, and steps S401 to S402 by calling the program code in the memory 740. For the sake of simplicity, the detailed description of this embodiment can be specifically referred to Figures 1 to 4 A description of the heat pump air replenishment control method and system and specific text content.

[0148] The communication interface 730 may be a wired interface (eg, an Ethernet interface) for communicating with other electronic devices or users. The relevant methods and concepts for implementation may be referred to in detail as described above and will not be repeated here.

[0149] The memory 740 may include a volatile memory, such as a random access memory (RAM); the memory may also include a non-volatile memory, such as a read-only memory (ROM), a flash memory, a hard disk drive (HDD) or a solid-state drive (SSD). The memory may also include a combination of the above-mentioned types of memory. The memory 740 may store program code and program data.

[0150] The bus 750 may be a peripheral component interconnect express (PCIe) bus, etc. The bus 750 may be divided into an address bus, a data bus, a control bus, etc. In addition to the data bus, the bus 750 may also include a power bus, a control bus, and a status signal bus, etc. However, for the sake of clarity, Figure 7 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0151] Optionally, the electronic device 700 may further include an input / output interface, the input / output interface is connected to an input / output device, and is used to receive input information and output operation results. Figure 7 Show more or fewer components, or have different component configurations.

[0152] Although the present invention describes functions performed by certain virtual components and physical entities, in a cloud service system application scenario, some or all of the above-mentioned encoding relationship management process may be distributed among multiple virtual components and entities, and one or more instances of the process may be executed on a distributed system, a virtual machine, and one or more cloud service systems.

[0153] The present application provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the computer program implements all the steps of the above-mentioned heat pump system air replenishment control method and system. For example, when the processor executes the computer program, the contents described in the heat pump system air replenishment control method and the heat pump air replenishment shutdown method as shown in steps S101 to S104, steps S201 to S205, steps S301 to S302, and steps S401 to S402 are implemented.

[0154] The computer software product is stored in a storage medium, including several instructions for making a computer device perform all or part of the steps of the method described in each embodiment of the present application. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, a computer, a database, a cloud service center, or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, database, cloud service center, or data center.

[0155] The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a parameter database or a data center that includes one or more available media, or a cloud storage resource provided by a cloud database. The available medium may be a magnetic medium (e.g., a floppy disk, a storage disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk, SSD), etc.

[0156] In addition, Figure 7 The logic instructions in the memory 740 shown can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product.

[0157] The present application also provides a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements all the steps of the air replenishment control method and system applied to the vehicle heat pump system introduced in the above embodiment. For example, when the processor executes the computer program, it implements the air replenishment control method process and related operations shown in steps S101 to S104, steps S201 to S205, steps S301 to S302 and steps S401 to S402.

[0158] The embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0159] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these 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.

Claims

1. A gas replenishment control method, characterized in that: A heat pump system applied to a vehicle, the method comprising: Acquire a first air supply control parameter, wherein the first air supply control parameter includes an external ambient temperature, a first heat pump pressure, and a compressor return air superheat, wherein the first heat pump pressure is a refrigerant pressure at an air inlet of the compressor; When the first air supplement control parameter satisfies the air supplement start condition, determining that the heat pump system starts the air supplement control mode, wherein the heat pump system includes a compressor, a main circuit and an air supplement circuit; Acquire a first valve control parameter, where the first valve control parameter includes the vehicle exterior environment temperature and a second heat pump pressure, where the second heat pump pressure is a refrigerant pressure at a compressor exhaust port; An initial opening of a first valve is determined based on the first valve control parameter, and the first valve is used to control the flow rate of refrigerant in the air replenishment circuit.

2. The method according to claim 1, characterized in that The air supplement start condition includes that the ambient temperature outside the vehicle is less than or equal to a temperature threshold, the compressor return air superheat is greater than or equal to a superheat threshold, and the first heat pump pressure is greater than or equal to a first pressure threshold.

3. The method according to claim 2, characterized in that The first air supplement control parameter also includes passenger compartment heat load and / or motor waste heat; In the case where the first air supplement control parameter includes the passenger compartment heat load, the air supplement start condition further includes that the passenger compartment heat load is greater than or equal to a heat load threshold; In the case where the first air supplement control parameter includes the motor residual heat, the air supplement start condition further includes that the heat generation power of the motor residual heat is greater than or equal to a heat generation power threshold.

4. The method according to claim 2 or 3, characterized in that: The determining the initial opening of the first valve based on the first valve control parameter comprises: The initial opening of the first valve is determined according to the first valve control parameter, the temperature threshold and the second pressure threshold, wherein the second pressure threshold is the threshold corresponding to the second heat pump pressure, the initial opening is positively correlated with the second heat pump pressure, and the initial opening is negatively correlated with the external ambient temperature.

5. The method according to any one of claims 1 to 4, characterized in that: After determining the initial opening of the first valve based on the first valve control parameter, the method further includes: When it is determined that the heat pump system is in the air supply control mode, obtaining a second valve control parameter at a first time interval, wherein the second valve control parameter includes a refrigerant superheat of the air supply circuit, a return air superheat of the compressor, and a pressure of the first heat pump; The target opening of the first valve is determined based on the second valve control parameter and the current opening, where the current opening is the current valve opening value of the first valve.

6. The method according to any one of claims 1 to 4, characterized in that: After determining the initial opening of the first valve based on the first valve control parameter, the method further includes: When it is determined that the heat pump system is in the air supplement control mode, a third valve control parameter is obtained at a second time interval, wherein the third valve control parameter includes an exhaust superheat, and the exhaust superheat is a difference between a compressor exhaust temperature and a saturation temperature of a compressor exhaust pressure; The target opening of the first valve is determined based on the third valve control parameter, and the current opening is the current valve opening value of the first valve.

7. The method according to any one of claims 1 to 6, characterized in that: After determining that the heat pump system starts the air supply control mode, the method further includes: acquiring a second air supplement control parameter at a third time interval, wherein the second air supplement control parameter includes parameter data describing the vehicle exterior environment temperature or the passenger compartment heat load; When the second air supplement control parameter does not satisfy the air supplement closing condition, determining that the heat pump system maintains the air supplement control mode; or, When the second air supplement control parameter satisfies the air supplement closing condition, determining that the heat pump system closes the air supplement control mode; The air replenishment closing condition includes that the difference between the outside environment temperature and the temperature threshold is greater than a first threshold, or the difference between the heat load threshold and the passenger compartment heat load is less than a second threshold.

8. The method according to claim 7, characterized in that After determining that the heat pump system is in the closed air supply control mode, the valve opening of the first valve is set to 0.

9. A gas replenishment control device, characterized in that: include: An acquisition module, used for acquiring a first air supply control parameter, wherein the first air supply control parameter includes an external ambient temperature, a first heat pump pressure, and a compressor return air superheat, wherein the first heat pump pressure is a refrigerant pressure at an air inlet of the compressor; a processing module, configured to determine that the heat pump system starts an air supply control mode when the first air supply control parameter satisfies an air supply start condition, wherein the heat pump system includes a compressor, a main circuit and an air supply circuit; The acquisition module is further used to acquire a first valve control parameter, wherein the first valve control parameter includes the vehicle external environment temperature and a second heat pump pressure, wherein the second heat pump pressure is a refrigerant pressure at an exhaust port of a compressor; The processing module is further used to determine the initial opening of the first valve based on the first valve control parameter, and the first valve is used to control the flow rate of the refrigerant in the air replenishment circuit; The sending module is used to send an instruction to the compressor to instruct the compressor to turn on or off the air supply control, and is also used to send an instruction to the first valve to instruct the first valve to adjust the valve opening.

10. An electronic device, characterized in that: The method comprises a memory and a processor, wherein the memory stores instructions, and when the processor executes the instructions in the memory, the method according to any one of claims 1 to 8 can be implemented.

11. A heat pump system, characterized in that: The electronic device comprising claim 10.

12. A vehicle, characterized in that: Includes the electronic device according to claim 10 or the heat pump system according to claim 11.

13. A computer storage medium, characterized in that: The method comprises a plurality of instructions, and when the instructions are executed by an electronic device, the method according to any one of claims 1 to 8 can be implemented.

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