Air supplement control method and device and electronic equipment

Abstract

The application provides a gas supplement control method and device and electronic equipment applied to a heat pump system of a vehicle. First, a first gas supplement control parameter is acquired, and the first gas supplement control parameter includes an outside environment temperature, a first heat pump pressure, and a compressor back gas superheat. Second, in a case where the first gas supplement control parameter satisfies a gas supplement opening condition, it is determined that the heat pump system opens a gas supplement control mode. Third, a first valve control parameter is acquired, and the first valve control parameter includes the outside environment temperature and a second heat pump pressure. Subsequently, an initial opening degree of a first valve is determined based on the first valve control parameter, and the first valve is used to control refrigerant flow in a gas supplement circuit. The application uses a numerical gas supplement air opening and closing judgment method and a gas supplement circuit control method, which can effectively improve the use efficiency and service life of the compressor of the heat pump system, and make the heating of the heat pump system in a low-temperature environment more rapid and comfortable to improve the driving experience.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of vehicle-mounted heat energy control, and particularly relates to a gas supplement control method and device suitable for a vehicle heat pump system and an electronic device. BACKGROUND

[0002] In the current vehicle-mounted heat pump control system, the compressor flow can be increased through the gas supplement circuit in the low-temperature heat pump mode, thereby increasing the work amount of the compressor, and the heating demand of the passenger compartment and the battery can be met in the low-temperature working condition without relying on the heating of PTC elements and the like. The heat pump system needs precise gas supplement control. In the case of improper gas supplement control, the refrigerant in the gas supplement circuit is prone to incomplete evaporation, thereby increasing the risk of liquid suction of the compressor and increasing the risk of damage to the compressor. Therefore, the vehicle-mounted heat pump gas supplement control system and the gas supplement control method are a subject worthy of research. SUMMARY

[0003] The application provides a gas supplement control method, device and electronic device. The gas supplement control method and system provided by the application can effectively improve the compressor use efficiency and service life of the vehicle heat pump system based on the existing vehicle-mounted compressor gas supplement enthalpy increase technology, use the numerical gas supplement air opening and closing judgment method and the gas supplement circuit control method, and make the heating of the vehicle heat pump system in the low-temperature environment more rapid and comfortable to improve the driving experience.

[0004] In a first aspect, a gas supplement control method is provided and applied to a heat pump system of a vehicle. First, a first gas supplement control parameter is obtained, the first gas supplement control parameter including an outside environment temperature, a first heat pump pressure and a compressor back gas superheat degree, the first heat pump pressure being a refrigerant pressure of a compressor suction port. Second, in the case that the first gas supplement control parameter meets a gas supplement opening condition, a heat pump system opening gas supplement control mode is determined, wherein the heat pump system includes a compressor, a main circuit and a gas supplement circuit. Third, a first valve control parameter is obtained, the first valve control parameter including the outside environment temperature and a second heat pump pressure, the second heat pump pressure being a refrigerant pressure of a compressor discharge port. Finally, an initial opening degree of the first valve is determined based on the first valve control parameter, the first valve being used to control the refrigerant flow in the gas supplement circuit. The method realizes real-time opening of the heat pump system to the gas supplement control mode according to the system operating condition by improving the condition judgment of opening the compressor gas supplement control, and accurately values the initial opening degree of the expansion valve of the gas supplement circuit in the state of opening the compressor gas supplement control.

[0005] In some possible embodiments, the gas supplement opening condition includes that the outside environment temperature is less than or equal to a temperature threshold, the compressor back gas superheat degree is greater than or equal to a superheat degree 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 further comprises a passenger cabin heat load and / or a motor residual heat. In the case where the first air supplement control parameter comprises the passenger cabin heat load, the air supplement opening condition further comprises that the passenger cabin heat load is greater than or equal to a heat load threshold value; in the case where the first air supplement control parameter comprises the motor residual heat, the air supplement opening condition further comprises that a heat generation power of the motor residual heat is greater than or equal to a heat generation power threshold value.

[0007] In some possible instances, the initial opening degree of the first valve is determined according to the first valve control parameter, the temperature threshold value and a second pressure threshold value, the second pressure threshold value is a threshold value corresponding to the second heat pump pressure, the initial opening degree is positively correlated with the second heat pump pressure, and the initial opening degree is negatively correlated with the outdoor environment temperature.

[0008] In some possible embodiments, after the initial opening degree of the first valve is determined based on the first valve control parameter, the air supplement control method provided by the present application further comprises:

[0009] In the case where it is determined that the heat pump system is in the air supplement control mode, a second valve control parameter is acquired at a first time interval, the second valve control parameter comprising a refrigerant superheat degree of an air supplement circuit, a compressor suction superheat degree and the first heat pump pressure. Subsequently, a target opening degree of the first valve is determined based on the second valve control parameter and a current opening degree, the current opening degree being a current valve opening degree value of the first valve.

[0010] Alternatively, in some possible embodiments, after the initial opening degree of the first valve is determined based on the first valve control parameter, the air supplement control method provided by the present application further comprises:

[0011] In the case where it is determined that the heat pump system is in the air supplement control mode, a third valve control parameter is acquired at a second time interval, the third valve control parameter comprising an exhaust superheat degree, the exhaust superheat degree being a difference between a compressor exhaust temperature and a saturation temperature of a compressor exhaust pressure. Subsequently, a target opening degree of the first valve is determined based on the third valve control parameter, the current opening degree being a current valve opening degree value of the first valve.

[0012] In some possible embodiments, after the determination that the heat pump system starts the air supplement control mode, the air supplement control method further includes obtaining a second air supplement control parameter at a third time interval, the second air supplement control parameter including parameter data describing the outside environment temperature or the passenger cabin heat load. In a case where 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, or, in a case where the second air supplement control parameter satisfies the air supplement closing condition, it is determined to close the air supplement control mode of the heat pump system. The air supplement closing condition includes that a difference between the outside environment temperature and the temperature threshold is greater than a first threshold, or a difference between the heat load threshold and the passenger cabin heat load is less than a second threshold.

[0013] In a second aspect, an air supplement control device is provided, applied to a heat pump system of a vehicle, including an obtaining module configured to obtain a first air supplement control parameter, the first air supplement control parameter including an outside environment temperature, a first heat pump pressure, and a compressor back gas superheat degree, the first heat pump pressure being a refrigerant pressure at a compressor suction port. The device further includes a processing module configured to determine, in a case where the first air supplement control parameter satisfies an air supplement starting condition, that the heat pump system starts an air supplement control mode, wherein the heat pump system includes a compressor, a main circuit, and a supplement circuit. The device further includes a sending module configured to send, to the compressor, an instruction indicating starting or closing of the air supplement control, and configured to send, to the first valve, an instruction indicating adjustment of a valve opening degree of the first valve. The air supplement control device provided in the present application realizes real-time starting of the air supplement control mode of the heat pump system according to system operation conditions by improving condition judgment for starting of the compressor air supplement control, and accurately values an initial opening degree of an expansion valve of the supplement circuit in a state where the compressor air supplement control is started.

[0014] First, the obtaining module obtains a first air supplement control parameter, the first air supplement control parameter including an outside environment temperature, a first heat pump pressure, and a compressor back gas superheat degree, the first heat pump pressure being a refrigerant pressure at a compressor suction port. Second, the processing module determines, in a case where the first air supplement control parameter satisfies an air supplement starting condition, that the heat pump system starts an air supplement control mode, wherein the heat pump system includes a compressor, a main circuit, and a supplement circuit. Third, the obtaining module obtains a first valve control parameter, the first valve control parameter including the outside environment temperature and a second heat pump pressure, the second heat pump pressure being a refrigerant pressure at a compressor discharge port. Finally, the processing module determines, based on the first valve control parameter, an initial opening degree of the first valve, the first valve being configured to control refrigerant flow in the supplement circuit.

[0015] In some possible embodiments, the gas supplement start condition comprises that the outside air temperature is less than or equal to a temperature threshold, the compressor back gas 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 gas supplement control parameter further comprises a passenger cabin heat load and / or motor residual heat. In the case where the first gas supplement control parameter comprises the passenger cabin heat load, the gas supplement start condition further comprises that the passenger cabin heat load is greater than or equal to a heat load threshold; in the case where the first gas supplement control parameter comprises the motor residual heat, the gas supplement start condition further comprises that a heat generation power of the motor residual heat is greater than or equal to a heat generation power threshold.

[0017] The aforementioned processing module determines an initial opening degree of the first valve based on the first valve control parameter, and in some possible instances, the determination method of the processing module comprises determining the initial opening degree of the first valve according to the first valve control parameter, the temperature threshold, and a second pressure threshold, wherein the second pressure threshold is a threshold corresponding to the second heat pump pressure, the initial opening degree is positively correlated with the second heat pump pressure, and the initial opening degree is negatively correlated with the outside air temperature.

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

[0019] In the case where it is determined that the heat pump system is in the gas supplement control mode, the acquisition module acquires second valve control parameters at a first time interval, the second valve control parameters comprising a gas supplement circuit refrigerant superheat, the compressor back gas superheat, and the first heat pump pressure. Subsequently, the processing module determines a target opening degree of the first valve based on the second valve control parameters and a current opening degree, the current opening degree being a current valve opening degree value of the first valve.

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

[0021] In the case where it is determined that the heat pump system is in the gas supplement control mode, the acquisition module acquires third valve control parameters at a second time interval, the third valve control parameters comprising an exhaust gas superheat, the exhaust gas superheat being a difference between a compressor exhaust gas temperature and a saturation temperature of a compressor exhaust gas pressure. Subsequently, the processing module determines a target opening degree of the first valve based on the third valve control parameters, the current opening degree being a current valve opening degree value of the first valve.

[0022] In some possible embodiments, after the determination of the opening of the heat pump system to the air supplement control mode, the air supplement control method further includes: an acquisition module acquires a second air supplement control parameter at a third time interval, the second air supplement control parameter including parameter data describing the outside environment temperature of the vehicle or the heat load of the passenger compartment. In the case where the second air supplement control parameter does not satisfy the air supplement closing condition, the processing module determines to maintain the air supplement control mode of the heat pump system, or in the case where the second air supplement control parameter satisfies the air supplement closing condition, the processing module determines to close the air supplement control mode of the heat pump system. The air supplement closing condition includes that the difference between the outside environment temperature of the vehicle and the temperature threshold is greater than a first threshold, or 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, including a memory and a processor. The memory stores instructions, and the processor, when executing the instructions stored in the memory, can implement the method of any of the embodiments of the first aspect.

[0024] In a fourth aspect, a heat pump system is provided, including the electronic device of the third aspect.

[0025] In a fifth aspect, a vehicle is provided, including the air supplement control device of the second aspect, the electronic device of the third aspect, and the heat pump system of the fourth aspect.

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

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

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

[0029] Figure 2 is a flowchart of a heat pump system air supplement control opening method provided by the present application;

[0030] Figure 3 is a flowchart of a method for determining the opening of a heat pump system to an air supplement control mode provided by the present application;

[0031] Figure 4 is a flowchart of a first air supplement circuit first valve opening degree control method provided by the present application;

[0032] Figure 5is a flow chart of a second valve opening degree control method of a supplementary gas circuit provided in the present application;

[0033] Figure 6 is a schematic diagram of a supplementary gas control device of a heat pump system provided in the present application.

[0034] Figure 7 is a structural schematic diagram of an electronic device provided in the present application. DETAILED DESCRIPTION

[0035] For the purpose, technical solutions and advantages of the present application to be more clear, the following will refer to the drawings in the embodiments of the present application, and the technical solutions of the present application will be described clearly and completely through the embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without making any creative efforts are within the scope of protection of the present application.

[0036] In the description of the present application, unless otherwise explicitly defined, the setting words such as words should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solutions.

[0037] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific embodiment", or "some examples" means that the specific features or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the exemplary description 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] For the convenience of the relevant field personnel to understand the present application, the application scenarios suitable for the present application are briefly described by combining the embodiments and the drawings.

[0039] Please refer to Figure 1 , Figure 1 is a schematic diagram of a heat pump supplementary gas control system provided in the present application. Figure 1 The heat pump supplementary gas control system in the illustrated embodiment includes 19 components and 4 refrigerant transmission circuits, which are main circuit, supplementary gas circuit, vehicle external condensing circuit and vehicle internal evaporation circuit respectively.

[0040] First, the main circuit is introduced, which includes a compressor 101, a first temperature and pressure sensor 102, a second solenoid valve 106, an in-vehicle condenser 107, a first heat exchanger 108, a first expansion valve 109, a second heat exchanger 110, a fourth solenoid valve 116, a gas-liquid separator 117, and a third temperature and pressure sensor 118. Next, the replenishment circuit is introduced, which includes a compressor 101, a first temperature and pressure sensor 102, a second solenoid valve 106, an in-vehicle condenser 107, a second expansion valve 111, a first heat exchanger 108, a fourth temperature and pressure sensor 119, and a third solenoid valve 112. Finally, the external condensation circuit is introduced, which is a unidirectional refrigerant circuit formed by sequentially 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. Finally, the in-vehicle evaporation circuit is introduced. The in-vehicle evaporation circuit is a unidirectional refrigerant circuit formed by sequentially 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.

[0041] During the heat pump's gas replenishment control operation, the refrigerant circulates in the main circuit and the gas replenishment circuit, exchanging heat through the in-vehicle condenser 107, the first heat exchanger 108, and the second heat exchanger 110. During the cooling control operation, the refrigerant flows in the external condensing circuit and the in-vehicle evaporating circuit, exchanging heat 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's gas injection control, the refrigerant circulating in the main circuit and the gas injection circuit undergoes the following phase change processes, including:

[0043] Firstly, the first refrigerant discharged from the compressor 101 passes through the first temperature and pressure sensor 102 and the second electromagnetic valve 106 to the in-vehicle condenser 107, and the first refrigerant is converted into the second refrigerant after heat exchange with the in-vehicle air through the in-vehicle condenser 107, wherein the first refrigerant is high-temperature and high-pressure gaseous refrigerant, and the second refrigerant is medium-temperature and high-pressure liquid refrigerant. Secondly, the second refrigerant is divided into the main refrigerant and the charge 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 connected to the main circuit through the first heat exchange channel directly, and the charge refrigerant is connected to the charge circuit through the second heat exchange channel after passing through the second expansion valve 111. Subsequently, the charge refrigerant is converted into the third refrigerant after heat exchange with the main refrigerant through the first heat exchanger 108, and the third refrigerant returns to the suction port of the compressor 101 through the third electromagnetic valve 112, wherein the third refrigerant is low-temperature and medium-pressure gaseous refrigerant. Then, after passing through the first heat exchanger 108, the main refrigerant is throttled by the first expansion valve 109, and is converted into the fourth refrigerant after heat exchange with the automobile motor in the second heat exchanger 110, wherein the fourth refrigerant is high-temperature gaseous / liquid two-phase refrigerant. Finally, the fourth refrigerant enters the gas-liquid separator 117 after passing through the fourth electromagnetic valve 116, and finally returns to the suction port of the compressor 101 after passing through the third temperature and pressure sensor 118.

[0044] At present, the control of the charge circuit flow in the prior art is not fine and rigorous enough. In the case of improper charge control, the refrigerant in the charge circuit is prone to incomplete evaporation, which in turn leads to liquid suction of the compressor and increases the risk of compressor damage. At the same time, since the charge control consumes more energy during operation, too frequent opening of the charge control will cause unnecessary waste of energy. Next, the prior art related to the present application and their deficiencies are introduced.

[0045] Firstly, the temperature and pressure sensor is used to monitor the refrigerant circuit. The advantages of this method are that the inlet temperature and outlet temperature of the compressor are monitored by the pressure sensor and the temperature sensor, the refrigerant circulation flow is controlled according to the monitoring results, and the air conditioner can be reliably and stably operated in high-temperature and high-cold regions; at the same time, the pressure sensor can also obtain the system pressure in real time, and judge whether the system refrigerant leaks, whether the system is blocked, etc. The disadvantage of this method is that only the pressure sensor and the temperature sensor are used to monitor the inlet temperature and outlet temperature of the charge compressor, and since the monitoring data is too little, the safety of the compressor and the service life of the compressor cannot be guaranteed during the opening, operation and closing of the charge control.

[0046] The second method is to control the opening degree of the electronic expansion valve in the charge air circuit. The advantage of this method is that the initial opening degree of the electronic expansion valve in the charge air circuit is reasonably valued, so that the system can quickly reach stability. However, in the process of heat pump charge control, this method still needs fine control of the opening degree of the electronic expansion valve in the charge air circuit to fully ensure the safety of the compressor and prolong the service life of the compressor during the opening, running and closing of the charge control.

[0047] To solve the above problems, the application provides a charge control method, including a charge control opening method applied to a vehicle heat pump system, a first valve target opening degree control method of a charge air circuit, and a charge control closing method. The charge control method provided by the application realizes real-time opening of the heat pump system to the charge control mode according to the system operating condition by setting multiple temperature and pressure sensors (the same as the temperature and pressure sensors in the foregoing text) in the main circuit and the charge air circuit of the vehicle heat pump system and setting an electronic expansion valve in the charge air circuit, improving the condition judgment of opening the compressor charge control. In the state of opening the compressor charge control, the initial opening degree of the expansion valve in the charge air circuit is accurately valued, and the current opening degree of the expansion valve in the charge air circuit is accurately calculated by coupling multiple operating parameters, so as to accurately control the expansion valve in the charge air circuit, prevent the compressor from being in danger of hydraulic compression and endanger the system operation safety, and ensure the use safety of the compressor and prolong the service life.

[0048] Please refer to Figure 2 The flowchart of the heat pump system charge control opening method provided by the application is shown. The charge control opening method applied to the vehicle heat pump system provided by the embodiment can be used in the heat pump charge control system shown in the embodiment. The specific steps are as follows: Figure 1 The flowchart of the heat pump system charge control opening method provided by the application is shown. The charge control opening method applied to the vehicle heat pump system provided by the embodiment can be used in the heat pump charge control system shown in the embodiment. The specific steps are as follows:

[0049] S101: Obtain the first charge control parameter.

[0050] The first charge control parameter includes the outdoor environment temperature Tw, the first heat pump pressure PL1 and the compressor return gas superheat degree SL1. The first heat pump pressure PL1 is a parameter data describing the refrigerant pressure at the inlet of the compressor; the outdoor environment temperature Tw is a parameter data collected by a temperature sensor arranged outside the vehicle; the first heat pump pressure PL1 and the compressor return gas superheat degree SL1 are Figure 1 The parameter data collected by the third temperature and pressure sensor 118 in the embodiment shown. After the heat pump system starts to work, the domain controller obtains the outdoor environment temperature Tw, the first heat pump pressure PL1 and the compressor return gas superheat degree SL1 collected by the vehicle-mounted sensors.

[0051] In some possible embodiments, the first air replenishment control parameter further includes any one or more of the following: 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 located inside the vehicle; the passenger compartment heat load H is the effective heat value of the heat pump required to reach the set temperature of the vehicle's air conditioning system; the motor waste heat or heater power P is parameter data representing the heating power of the vehicle's heat source.

[0052] S102: If the first gas replenishment control parameter meets the gas replenishment start condition, determine that the heat pump system starts the gas replenishment control mode.

[0053] The conditions for starting the air replenishment include an external ambient temperature Tw less than or equal to a temperature threshold Twset, a compressor return air superheat SL1 greater than or equal to a superheat threshold SL1set, and a first heat pump pressure PL1 greater than or equal to a first pressure threshold PL1set.

[0054] In some possible embodiments, when the first air replenishment control parameter includes the passenger compartment heat load H, the air replenishment activation condition further includes the passenger compartment heat load H being greater than or equal to a heat load threshold Hset. In some possible embodiments, when the first air replenishment control parameter includes one or more of motor waste heat and heater power, the air replenishment activation condition further includes the heat generation power P of the motor waste heat and / or heater power being greater than or equal to a heat generation power threshold Pm. In some possible embodiments, when the first air replenishment control parameter includes heater power, the air replenishment activation condition further includes the heat generation power P of the heater power being greater than or equal to a heat generation power threshold Pm. In some possible embodiments, when the first air replenishment control parameter includes motor waste heat and heater power, the air replenishment activation condition further includes the heat generation power P of the motor waste heat and heater power being greater than or equal to a heat generation power threshold Pm.

[0055] After the heat pump system determines that it is in the gas supply control mode, the domain controller instructs the compressor to enter the gas supply control state and opens the gas supply circuit inlet connected to the compressor. Simultaneously, the domain controller instructs the reference... Figure 1 In the illustrated embodiment, the second expansion valve 111 opens to initiate 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, steps S103 to S104 will describe the method for confirming the initial opening degree K1 of the first valve after the heat pump system enters the gas replenishment control.

[0056] S103: Obtain the first valve control parameters.

[0057] The first valve control parameters include the external ambient temperature (Tw) and the second heat pump pressure (PH), where the second heat pump pressure is the refrigerant pressure at the compressor exhaust port. Corresponding to... Figure 1In the illustrated embodiment, the domain controller acquires the high-pressure signal of the refrigerant at the exhaust port of the compressor through the first pressure sensor 102, and takes the average system high-pressure value of the system high-pressure signal as the system high-pressure PH every interval.

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

[0059] The initial opening degree 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 flow of refrigerant in the gas supplement circuit, and the initial opening degree K1 is positively correlated with the second heat pump pressure PH and negatively correlated with the outdoor ambient temperature Twset.

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

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

[0062] Wherein, K0 is the basic opening degree 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 by setting the standard of the specific vehicle.

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

[0064] For the convenience of relevant personnel in the art to understand step S102, the following embodiment will specifically introduce a method for determining the opening of the gas supplement control mode of the heat pump system provided by the present application. It can be understood that the method for determining the opening of the gas supplement control mode of the heat pump system provided by the present embodiment corresponds to the specific operation in step S102.

[0065] Please refer to Figure 3 , Figure 3 A flow chart of a method for determining the opening of the gas supplement control mode of the heat pump system is provided by the present application. By sequentially determining the opening of the gas supplement control through the method provided by the present embodiment, the timing of the heat pump system entering the gas supplement control can be accurately determined, which not only saves energy loss but also effectively controls the service life of the compressor, wherein the heat pump system includes a compressor, a main circuit and a gas supplement circuit. The specific method steps are as follows:

[0066] S201: Determine whether the outdoor ambient temperature reaches the temperature threshold.

[0067] After the vehicle heat pump system is started, 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 environment temperature Tw every interval. If the outside environment temperature Tw is less than or equal to the temperature threshold Twset, the next step of S202 is entered, otherwise the judgment process of determining the heat pump system opening supplementary air control mode is exited. In a low temperature environment, the heating capacity of the heat pump system is insufficient, and when the outside environment temperature Tw is lower than a certain value, the supplementary air control is entered, which can greatly improve the low temperature heating capacity and expand the working temperature range of the heat pump.

[0068] The formula (2) for determining whether the outside environment temperature 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, and the temperature threshold Twset is usually in the range of -40℃ to -20℃ under normal circumstances.

[0071] S202: In the case that the first supplementary air control parameter includes the passenger compartment heat load, it is determined whether the passenger compartment heat load reaches the heat load threshold.

[0072] If the first supplementary air control parameter does not include the passenger compartment heat load, the next step of S203 is directly entered. If the first supplementary air control parameter includes the passenger compartment heat load, then:

[0073] After the vehicle heat pump system is started, the domain controller collects the inside temperature signal of the inside temperature sensor in real time, and calculates the passenger compartment heat load H according to the inside temperature signal every interval. If the passenger compartment heat load H is greater than or equal to the heat load threshold Hset, the next step of S203 is entered, otherwise the judgment process of determining the heat pump system opening supplementary air control mode is exited. This step considers whether the automobile heat pump can meet the passenger compartment heating demand without entering the supplementary air control, and if it cannot meet the heating demand, the supplementary air control needs to be started.

[0074] The formula (3) for determining 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 production value of the heat pump required for the inside temperature value to reach the set temperature of the vehicle air conditioner, and the heat load threshold Hset includes a constant value set by the heating capacity of the vehicle heat pump.

[0077] In other possible embodiments, the step contents expressed by S202 and S203 can be interchanged in execution order, which is not limited here.

[0078] S203: In the case that the first charge air control parameter includes one or more of the motor residual heat or the heater power, determine whether the heat production power reaches a heat production power threshold.

[0079] If the first charge air control parameter does not include any of the motor residual heat or the heater power, directly enter the next step of S204. If the first charge air control parameter includes one or more of the motor residual heat or the heater power, there is:

[0080] After the vehicle-mounted heat pump system is turned on, the domain controller collects the heat production power data of other heat production devices of the vehicle in real time, and calculates the heat production power P according to the heat production data including the motor residual heat or the heater power every interval of time. In the case that the heat production power P is greater than or equal to the heat production power threshold Pm, enter the next step of S204, otherwise, exit the judgment process of determining the heat pump system opening charge air control mode. Since the automobile heat pump system works in a low temperature environment, the return air superheat degree is low. In order to avoid the phenomenon of compressor liquid compression caused by entering the charge air control mode, the return air superheat degree S1Lset is set to control the occurrence of the phenomenon of compressor liquid compression.

[0081] The formula (4) for determining whether the heat production power reaches the heat production power threshold is as follows:

[0082] P≥Pm (4)

[0083] Wherein, the heat production power threshold Pm includes a constant value set by the vehicle heat pump heating capacity.

[0084] In other possible embodiments, the step contents expressed by S202 and S203 can be interchanged in the execution order, which is not limited here.

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

[0086] After the vehicle-mounted heat pump system is turned on, the domain controller collects the reference Figure 1 The compressor return air superheat degree signal of the third temperature and pressure sensor 118 in the embodiment shown, the return air superheat degree is represented as the difference between the compressor inlet temperature and the saturation temperature corresponding to the inlet pressure of the main circuit. The average superheat value of the compressor return air superheat degree signal is taken as the compressor return air superheat degree SL1 every interval of time. In the case that the compressor return air superheat degree SL1 is greater than or equal to the compressor superheat degree threshold SLset, directly enter step S205, otherwise, exit the judgment process of determining the heat pump system opening charge air control mode.

[0087] The formula (5) for determining whether the compressor return air superheat degree reaches the superheat degree threshold is as follows:

[0088] SL1≥ SL1set (5)

[0089] Wherein, the compressor back gas superheat degree SL1 includes the relevant value of detecting the main circuit temperature, and the superheat threshold SLset includes a constant value set by the vehicle heat pump heating capacity.

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

[0091] After the vehicle-mounted heat pump system is started, the domain controller collects the reference Figure 1 The third temperature and pressure sensor 118 in the embodiment shown in the main circuit of the refrigerant low pressure signal, every interval a certain time will be the average low pressure value of the system low pressure signal as the first heat pump pressure PL1, in the case of the first heat pump pressure PL1 less than or equal to the first pressure threshold PLset, start the air supplement control mode of the heat pump system, otherwise exit the judgment process of determining the start of the air supplement control mode of the heat pump system. Because the heat pump system will cause a part of the refrigerant material to be diverted when entering the air supplement control mode, in order to avoid the low suction pressure of the compressor, this step sets a refrigerant low pressure protection value PL1set of 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] Wherein, the first heat pump pressure PL1 includes the low pressure parameter data of the refrigerant in the main circuit at the suction port of the compressor, and the first pressure threshold PLset includes a constant value set by the vehicle heat pump heating capacity.

[0095] The air supplement control method proposed in the present application includes the air supplement control start method of the vehicle heat pump system, the first valve target opening control method of the air supplement circuit, and the air supplement control closing method. The air supplement control start method of the heat pump system is introduced in the foregoing, and a first valve target opening control method of the air supplement circuit is introduced next. This method controls the valve opening of the first valve in the air supplement circuit in real time, controls the refrigerant pressure and temperature in the air supplement circuit by controlling the flow of the refrigerant in the air supplement circuit, and can effectively ensure that the refrigerant pressure at the suction port of the compressor is accurately controlled to protect the stable operation of the compressor and prolong the service life of the compressor.

[0096] After the heat pump system enters the air supplement 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 scheme requirement. Two specific embodiments are provided in the present application to introduce the method of determining the target opening of the first valve.

[0097] Please refer to Figure 4 ,Figure 4 The flow chart of the first valve opening degree control method of the first compensation circuit provided in the present application. The compensation circuit first valve opening degree control method provided in the present embodiment is a method for realizing compensation circuit refrigerant flow control by adjusting the opening degree of the first valve in the compensation circuit under the condition that the vehicle heat pump system is in the compensation control mode. It can be applied to the heat pump compensation control system in the embodiment shown in Figure 1 It can be understood that Figure 1 The second expansion valve 111 in the embodiment corresponds to the first valve in the present embodiment. The specific steps are as follows:

[0098] S301: Under the condition that it is determined that the heat pump system is in the compensation control mode, the second valve control parameter is acquired at a first time interval.

[0099] This step is used to collect parameters related to the calculation of the target opening degree 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 parameter includes the compensation circuit refrigerant superheat SL2, the compressor suction superheat SL1 and the first heat pump pressure PL1. Corresponding to Figure 1 In the embodiment shown in the embodiment, the domain controller acquires the refrigerant superheat signal at the suction port connected between the compressor and the compensation circuit through the fourth temperature and pressure sensor 119. The suction superheat represents the difference between the suction temperature of the compressor and the saturation temperature corresponding to the suction port pressure of the compensation circuit. The average value of the compensation circuit refrigerant superheat signal every interval is taken as the compensation circuit refrigerant superheat SL2.

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

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

[0103] K3 = K2 + c * (SL2 - SL2set) + Δ1 + Δ2 (7)

[0104] Wherein, c is a constant parameter in the formula, the current opening degree K2 is the valve opening degree value of the first valve at the present time, the target suction superheat SL2set is the threshold value corresponding to the compensation circuit refrigerant superheat SL2, and the target superheat SL2set is a constant value obtained by setting the standard of the specific vehicle.

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

[0106] Table 1 Calculation method comparison table of return gas 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 gas superheat SL1 is the real-time parameter data obtained by the temperature and pressure sensor collecting signals, and the target compressor return gas superheat SL1m is a constant value calibrated by the vehicle heat pump system.

[0109] Table 2 Calculation method comparison table of 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 the real-time parameter data obtained by the temperature and pressure sensor collecting signals, 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] Please refer to Figure 5 , Figure 5 The flow chart of the second kind of supplementary circuit first valve opening control method provided in the present application. The supplementary circuit first valve opening control method provided in the present embodiment is a method for realizing the control of the flow of refrigerant in the supplementary circuit by adjusting the opening of the first valve in the supplementary circuit, which is executed when the vehicle heat pump system is in the supplementary gas control mode. It can be applied to the heat pump supplementary gas control system in the embodiment shown in Figure 1 It can be understood that Figure 1 The second expansion valve 111 in the embodiment corresponds to the first valve in the present embodiment. The specific steps are as follows:

[0114] S401: In the case of determining that the heat pump system is in the supplementary gas control mode, acquiring the third valve control parameter at a second time interval.

[0115] This step is used to collect the parameters for calculating the target opening of the first valve. 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 corresponding saturation temperature of the compressor exhaust pressure. Corresponding to Figure 1 In the embodiment shown, the domain controller obtains the refrigerant superheat signal at the exhaust port of the compressor 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 every interval.

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

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

[0118] K3 = K2 + d * (SH - SHm) + Δ1 + Δ2 (8)

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

[0120] Δ1 is the exhaust superheat correction value, and Δ2 is the first heat pump pressure correction value. For the determination method of the values of Δ1 and Δ2, please refer to the calculation method set in Table 1 and Table 2 in the foregoing, 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] Through Figure 3 and Figure 4 The first valve opening control method described in the two embodiments can be used to Figure 1 The first valve opening control method described in the two embodiments can be used to

[0123] The air supplement control method also includes an air supplement control closing method of the vehicle heat pump system. Next, a method for determining how to close the air supplement control mode after the heat pump system is opened in the air supplement control mode is introduced. The method realizes real-time opening / closing of the air supplement control mode of the heat pump system according to system operation conditions by improving the condition judgment for opening / closing the air supplement control of the compressor, which can ensure the safe use of the compressor and prolong the service life.

[0124] Firstly, a second air supplement control parameter is acquired at a third time interval. The second air supplement control parameter includes parameter data describing the outdoor environment temperature Tw and the passenger cabin heat load H. This step is used to determine the related parameters of the air supplement control mode closing condition. In some possible embodiments, the third time interval can be set to tens of seconds or 1 minute according to the actual working requirement of the heat pump system, which is not limited here.

[0125] Secondly, in the case that 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] It is determined whether the air supplement closing condition is satisfied at a preset time interval. In the case that the difference between the outdoor environment temperature Tw and the temperature threshold Twset is not greater than the first threshold ΔT, or in the case that the difference between the heat load threshold Hset and the passenger cabin heat load H is not less than the second threshold ΔH, it is determined that the heat pump system maintains the air supplement control mode.

[0127] The formula (9) and the formula (10) for determining that the heat pump system maintains the air supplement control mode are as follows:

[0128] Twset < Tw ≤ Twset + ΔT (9)

[0129] H ≥ Hset - ΔH (10)

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

[0131] Finally, in the case that 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] It is determined whether the air supplement closing condition is satisfied at a preset time interval. In the case that the difference between the outdoor environment temperature Tw and the temperature threshold Twset is greater than the first threshold ΔT, or in the case that the difference between the heat load threshold Hset and the passenger cabin heat load H is less than the second threshold ΔH, it is determined that the heat pump system closes the air supplement control mode.

[0133] The formulas (11) and (12) for determining the closing of the heat pump system and the air supplement control mode are as follows:

[0134] Tw > Twset + ΔT (11)

[0135] H < Hset - ΔH (12)

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

[0137] After the heat pump system determines to close the air supplement control mode of the heat pump system, the domain controller instructs the compressor to exit the air supplement control state and closes the air supplement circuit and the air inlet connected with the compressor. Simultaneously, the domain controller instructs the reference Figure 1 The second expansion valve 111 in the embodiment shown is closed, i.e., the opening degree of the first valve is set to 0.

[0138] Please refer to Figure 6 , Figure 6 is a schematic diagram of a heat pump system air supplement control device provided by the present application. The heat pump system air supplement control device 600 provided by the embodiment is used to realize Figure 1 The heat pump system air supplement control system and the steps S101-S104, S201-S205, S301-S302 and S401-S402 shown in the heat pump system air supplement control method and the heat pump air supplement closing method provided by the embodiment. The heat pump system air supplement control device 600 provided by the embodiment comprises an acquisition module 610, a processing module 620 and a sending module 630.

[0139] The acquisition module 610 is used to acquire first air supplement control parameters, and the first air supplement control parameters comprise an outside environment temperature, a first heat pump pressure and a compressor back gas superheat degree, and the first heat pump pressure is the refrigerant pressure of the air inlet of the compressor. Further, the acquisition module 610 is also used to acquire first valve control parameters, and the first valve control parameters comprise an outside environment temperature and a second heat pump pressure, and the second heat pump pressure is the refrigerant pressure of the air outlet of the compressor. Further, the acquisition module 610 is also used to acquire second valve control parameters at a first time interval, and the second valve control parameters comprise a refrigerant superheat degree of the air supplement circuit, a compressor back gas superheat degree and a first heat pump pressure. Further, the acquisition module 610 is also used to acquire third valve control parameters at a second time interval, and the third valve control parameters comprise an exhaust gas superheat degree, and the exhaust gas superheat degree is the difference between the exhaust gas temperature of the compressor and the saturation temperature of the exhaust gas pressure of the compressor. Further, the acquisition module 610 is also used to acquire second air supplement control parameters at a third time interval, and the second air supplement control parameters comprise parameter data describing the outside environment temperature and the heat load of the passenger cabin.

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

[0141] The processing module 620 is configured to determine that the heat pump system enters a gas supplement control mode when the first gas supplement control parameter satisfies a gas supplement opening condition, wherein the heat pump system comprises a compressor, a main circuit, and a gas supplement circuit. Further, the processing module 620 is further configured to determine an initial opening degree of the first valve based on the first valve control parameter, the first valve being used to control the refrigerant flow in the gas supplement circuit. Further, the processing module 620 is further configured to determine a target opening degree of the first valve based on the second valve control parameter and the current opening degree, the current opening degree being a current valve opening value of the first valve. Further, the processing module 620 is further configured to determine the target opening degree of the first valve based on the third valve control parameter, the current opening degree being the current valve opening value of the first valve. Further, the processing module 620 is further configured to determine to maintain the gas supplement control mode of the heat pump system when the second gas supplement control parameter does not satisfy a gas supplement closing condition, or to determine to close the gas supplement control mode of the heat pump system when the second gas supplement control parameter satisfies the gas supplement closing condition.

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

[0143] The sending module 630 is configured to send an instruction indicating to open or close the gas supplement control to the compressor, and to send an instruction indicating the first valve to adjust the valve opening degree to the first valve.

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

[0145] Please refer to Figure 7 , Figure 7is a structural schematic diagram of an electronic device provided in the present application. The electronic device 700 shown in the present application comprises 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 the embodiment can correspond to the domain controller mentioned in the above-mentioned embodiments for implementing the heat pump air supplement control method and device.

[0146] The processor 710 comprises 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 processor (GPU). 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), etc. 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 part of the methods discussed herein.

[0147] The processor 710 can be configured to perform the content described in the heat pump system air supplement control method and the heat pump air supplement closing method shown in steps S101-S104, steps S201-S205, steps S301-S302, and steps S401-S402 by invoking the program code in the memory 740. For the sake of simplicity, the embodiment is described in detail, and the specific content can be referred to in Figure 1 to Figure 4 The heat pump air supplement control method and system are described in detail.

[0148] The communication interface 730 can be a wired interface (for example, an Ethernet interface) for communicating with other electronic devices or users. The related methods and concepts for implementation can be referred to the detailed description as described above, and will not be described here.

[0149] The memory 740 can include volatile memory (Volatile Memory), such as random access memory (Random Access Memory, RAM); the memory can also include non-volatile memory (Non-Volatile Memory), such as read-only memory (Read-Only Memory, ROM), flash memory (Flash Memory), hard disk (Hard Disk Drive, HDD), or solid-state disk (Solid-State Drive, SSD) memory. The memory 740 can store program code and program data.

[0150] The bus 750 can be a peripheral component interconnect express (Peripheral Component Interconnect Express, PCIe) bus or the like. The bus 750 can be divided into an address bus, a data bus, a control bus, and the like. In addition to the data bus, the bus 750 can 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 figure, but it does not mean that there is only one bus or only one type of bus.

[0151] Optionally, the electronic device 700 can also include an input / output interface connected with an input / output device for receiving input information and outputting operation results. The electronic device 700 can include more or fewer components than those shown, or have different component configurations. Figure 7 More or fewer components can be shown, or different component configurations can be used.

[0152] Although the present application describes functions performed by certain virtual components and physical entities, in a cloud service system application scenario, some or all of the above-mentioned coding relationship management processes can be distributed among multiple virtual components and entities, and one or more instances of the processes can 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 having stored thereon a computer program which, when executed by a processor, implements all the steps of the heat pump system air supplement control method and system described above, for example, the processor executes the computer program to implement the content described in the heat pump system air supplement control method and the heat pump air supplement shutdown method as shown in steps S101-S104, steps S201-S205, steps S301-S302, and steps S401-S402.

[0154] The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device to perform all or part of the steps of the method described in the various embodiments of the present application. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another, for example, the computer instructions can be transferred from one website, computer, database, cloud service center or data center to another website, computer, database, cloud service center or data center through wired (such as coaxial cable, optical fiber, digital subscriber line) or wireless (such as infrared, wireless, microwave, etc.).

[0155] The computer-readable storage medium can be any available medium accessible by a computer or a parameter database, data center, etc. data storage device integrated with one or more available media sets, and can also be a cloud storage resource provided by a cloud database. The available medium can be a magnetic medium (for example, a floppy disk, a storage disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state storage disk, SSD), etc.

[0156] In addition, in Figure 7 The logic instructions in the memory 740 shown can be implemented in the form of software functional units and sold or used as independent products when the software functional units are sold or used. Based on such understanding, the technical solutions of the present application or the part of the technical solutions that essentially contribute to the prior art or the part of the technical solutions can be embodied in the form of a software product.

[0157] The application further provides a computer program product, which comprises a computer program. When a processor executes the computer program, all steps of the air supplement control method and system applied to the vehicle heat pump system described in the above embodiments are implemented, for example, the processor executes the computer program to implement the air supplement control method process and related operations shown in steps S101-S104, steps S201-S205, steps S301-S302, and steps S401-S402.

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

[0159] The above embodiments are only used to illustrate the technical solutions of the application, but not to limit them. Although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents. The modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the application.

Claims

1. A method of air charge control, characterized by, A heat pump system applied to a vehicle, the method comprising: obtaining a first gas supplement control parameter, the first gas supplement control parameter comprising an outside environment temperature, a first heat pump pressure, and a compressor back gas superheat degree, the first heat pump pressure being a refrigerant pressure of a compressor suction port; in a case where the first gas supplement control parameter meets a gas supplement opening condition, determining that the heat pump system opens a gas supplement control mode, wherein the heat pump system comprises a compressor, a main circuit, and a gas supplement circuit; obtaining a first valve control parameter, the first valve control parameter comprising the outside environment temperature and a second heat pump pressure, the second heat pump pressure being a refrigerant pressure of a compressor discharge port; determining an initial opening degree of a first valve based on the first valve control parameter, the first valve being used to control a refrigerant flow in the gas supplement circuit, the determining the initial opening degree of the first valve based on the first valve control parameter comprising: determining the initial opening degree of the first valve according to the first valve control parameter, a temperature threshold, and a second pressure threshold, wherein the second pressure threshold is a threshold corresponding to the second heat pump pressure, the initial opening degree being positively correlated with the second heat pump pressure, and the initial opening degree being negatively correlated with the outside environment temperature; after the determining the initial opening degree of the first valve based on the first valve control parameter, the method further comprising: in a case where it is determined that the heat pump system is in the gas supplement control mode, obtaining a second valve control parameter at a first time interval, the second valve control parameter comprising a gas supplement circuit refrigerant superheat degree, the compressor back gas superheat degree, and the first heat pump pressure; determining a target opening degree of the first valve based on the second valve control parameter and a current opening degree, the current opening degree being a current valve opening degree value of the first valve; or in a case where it is determined that the heat pump system is in the gas supplement control mode, obtaining a third valve control parameter at a second time interval, the third valve control parameter comprising a discharge gas superheat degree, the discharge gas superheat degree being a difference between a compressor discharge temperature and a saturation temperature of a compressor discharge pressure; determining the target opening degree of the first valve based on the third valve control parameter, the current opening degree being a current valve opening degree value of the first valve.

2. The method of claim 1, wherein, The gas supplement opening condition comprises that the outside environment temperature is less than or equal to the temperature threshold, the compressor back gas superheat degree is greater than or equal to a superheat degree threshold, and the first heat pump pressure is greater than or equal to a first pressure threshold.

3. The method of claim 2, wherein: the first gas supplement control parameter further comprises a passenger compartment heat load and / or motor residual heat; in a case where the first gas supplement control parameter comprises the passenger compartment heat load, the gas supplement opening condition further comprises that the passenger compartment heat load is greater than or equal to a heat load threshold; in a case where the first gas supplement control parameter comprises the motor residual heat, the gas supplement opening condition further comprises that a heat generation power of the motor residual heat is greater than or equal to a heat generation power threshold.

4. The method of claim 3, wherein, after the determining that the heat pump system opens the gas supplement control mode, the method further comprising: acquire a second air supplement control parameter at a third time interval, the second air supplement control parameter comprising parameter data describing the outside environment temperature or the passenger cabin heat load; determine that the heat pump system maintains the air supplement control mode in a case where the second air supplement control parameter does not satisfy an air supplement closing condition; or determine that the heat pump system closes the air supplement control mode in a case where the second air supplement control parameter satisfies the air supplement closing condition; wherein the air supplement closing condition comprises a difference between the outside environment temperature and the temperature threshold being greater than a first threshold, or a difference between the heat load threshold and the passenger cabin heat load being less than a second threshold.

5. The method of claim 4, wherein, set a valve opening degree of the first valve to 0 after the determination that the heat pump system closes the air supplement control mode.

6. A gas make-up control device, characterized by, comprise: an acquisition module, configured to acquire a first air supplement control parameter, the first air supplement control parameter comprising an outside environment temperature, a first heat pump pressure, and a compressor back gas superheat degree, the first heat pump pressure being a refrigerant pressure at a compressor suction port; a processing module, configured to determine that a heat pump system opens an air supplement control mode in a case where the first air supplement control parameter satisfies an air supplement opening condition, wherein the heat pump system comprises a compressor, a main circuit, and an air supplement circuit; the acquisition module, further configured to acquire a first valve control parameter, the first valve control parameter comprising the outside environment temperature and a second heat pump pressure, the second heat pump pressure being a refrigerant pressure at a compressor discharge port; the processing module, further configured to determine an initial opening degree of the first valve based on the first valve control parameter, the first valve being used to control a refrigerant flow in the air supplement circuit; a sending module, configured to send an instruction indicating opening or closing of the air supplement control to the compressor, and further configured to send an instruction indicating adjustment of a valve opening degree of the first valve to the first valve.

7. An electronic device, comprising: comprise a memory and a processor, wherein the memory stores instructions, and the processor, when running the instructions in the memory, can implement the method according to any one of claims 1 to 5.

8. A heat pump system, characterized by, comprise the electronic device according to claim 7.

9. A vehicle characterized by comprising: comprise the electronic device according to claim 7 or the heat pump system according to claim 8.

10. A computer storage medium, characterized in that, comprise a plurality of instructions, which, when run by an electronic device, can implement the method according to any one of claims 1 to 5.

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