Compressor air supplement control method and device, air conditioning system and storage medium

Abstract

The application provides a compressor air supplement control method and device, an air conditioning system and a storage medium. The method comprises the following steps: obtaining the back gas pressure of a compressor and the back gas temperature of the compressor, and determining a first air supplement adjustment parameter of the compressor according to the back gas temperature and the back gas pressure; if the working mode of the air conditioner is a heating mode, obtaining the input flow temperature of the separator and the air supplement pressure of the compressor; determining a second air supplement adjustment parameter of the compressor according to the input flow temperature, the back gas pressure and the air supplement pressure; and adjusting the air supplement flow of the compressor according to the first air supplement adjustment parameter and the second air supplement adjustment parameter. The working parameters of the compressor are obtained and analyzed, and the corresponding air supplement adjustment parameters are determined to control the air supplement flow of the compressor, so as to ensure the air supplement control precision of the compressor and improve the working performance of the air conditioner.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, specifically to a compressor gas supply control method, device, air conditioning system, and storage medium. Background Technology

[0002] Air conditioners primarily regulate ambient temperature by creating a refrigerant circulation path through a compressor and heat exchanger. Due to the diverse operating environments, air conditioners may experience suboptimal performance in low or high temperature conditions. Related technologies address this by supplementing the compressor with gas to increase its enthalpy and thus improve its output.

[0003] In related technologies, compressor gas replenishment is mainly controlled by preset thresholds or fuzzy control, which results in poor compressor gas replenishment control accuracy and affects the working performance of the air conditioner. Summary of the Invention

[0004] To address the issue of poor air conditioning performance, this application provides a compressor gas replenishment control method, device, air conditioning system, and storage medium. This method abandons traditional compressor gas replenishment control methods, ensures the accuracy of compressor gas replenishment control, and thereby improves the air conditioning performance.

[0005] In a first aspect, this application provides a compressor gas supply control method applied to an air conditioning system, the air conditioning system including a compressor and a separator connected to the compressor's gas supply port, gas return port and exhaust port respectively, the method including:

[0006] The compressor's return gas pressure and return gas temperature are obtained, and the first gas supply adjustment parameter of the compressor is determined based on the return gas temperature and the return gas pressure.

[0007] If the air conditioner is in heating mode, then the input flow rate and temperature of the separator and the gas supply pressure of the compressor are obtained.

[0008] The second gas supply adjustment parameter of the compressor is determined based on the input flow temperature, the return gas pressure, and the gas supply pressure.

[0009] The gas supply flow rate of the compressor is adjusted according to the first gas supply adjustment parameter and the second gas supply adjustment parameter.

[0010] In one possible implementation of this application, determining the second gas supply adjustment parameter of the compressor based on the input flow temperature, the return gas pressure, and the gas supply pressure includes:

[0011] The target subcooling degree of the compressor is calculated based on the return gas pressure and the input flow rate temperature.

[0012] Based on the relationship between the target subcooling and the preset cooling degree corresponding to the heating mode, the first flow sub-parameter of the separator's input end is determined;

[0013] The second flow rate sub-parameter at the input end of the separator is determined based on the relationship between the pressure difference between the return gas pressure and the make-up gas pressure and the preset pressure difference value.

[0014] The second air supply adjustment parameter is determined based on the first flow rate sub-parameter and the second flow rate sub-parameter.

[0015] In one possible implementation of this application, before determining the second air injection adjustment parameter based on the first flow rate sub-parameter and the second flow rate sub-parameter, the following steps are included:

[0016] Based on the configuration parameters of the compressor and the separator, the preset mapping table corresponding to the configuration and weight in the heating mode is searched to determine the preset subcooling weight and preset pressure difference weight corresponding to the configuration parameters.

[0017] The step of determining the second gas injection adjustment parameter based on the first flow rate sub-parameter and the second flow rate sub-parameter includes:

[0018] The first flow sub-parameter is corrected according to the subcooling preset weight in the heating mode;

[0019] The second flow sub-parameter is corrected according to the preset weight of the pressure difference under the heating mode;

[0020] The corrected first flow rate sub-parameter and the corrected second flow rate sub-parameter are combined to determine the second gas injection adjustment parameter.

[0021] In one possible implementation of this application, adjusting the compressor's gas supply flow rate according to the first gas supply adjustment parameter and the second gas supply adjustment parameter includes:

[0022] Obtain the input flow rate of the separator and the output flow rate of the separator connected to the compressor return port;

[0023] The target input flow rate is calculated based on the second air replenishment adjustment parameter and the input flow rate. If the target input flow rate does not exceed the preset flow rate range, the input of the separator is controlled based on the target input flow rate.

[0024] The target output flow rate is calculated based on the first air replenishment adjustment parameter and the output flow rate. If the target output flow rate does not exceed the preset flow rate range, the output of the separator is controlled based on the target output flow rate.

[0025] In one possible implementation of this application, the step of obtaining the compressor's return gas pressure and return gas temperature, and determining the compressor's first gas supply adjustment parameter based on the return gas temperature and return gas pressure, includes:

[0026] According to the preset mapping table of pressure and temperature, find the target saturation temperature corresponding to the return gas pressure;

[0027] Calculate the target superheat of the compressor based on the target saturation temperature and the return gas temperature;

[0028] The first gas injection adjustment parameter of the compressor is determined based on the target superheat and the preset superheat corresponding to the air conditioner's operating mode.

[0029] In one possible implementation of this application, after obtaining the compressor's return gas pressure and return gas temperature, and determining the compressor's first gas supply adjustment parameter based on the return gas temperature and return gas pressure, the method further includes:

[0030] If the air conditioner is in cooling mode, the input of the separator is adjusted according to the preset adjustment parameters.

[0031] Adjust the output of the separator according to the first air replenishment adjustment parameter.

[0032] Secondly, this application also provides a compressor gas replenishment control device for use in an air conditioning system, the air conditioning system including a compressor and a separator connected to the compressor's gas replenishment port, gas return port and exhaust port respectively, the compressor gas replenishment control device including:

[0033] First acquisition module: used to acquire the return gas pressure and return gas temperature of the compressor, and determine the first gas supply adjustment parameter of the compressor based on the return gas temperature and the return gas pressure;

[0034] The second acquisition module is used to acquire the input flow rate and temperature of the separator and the gas supply pressure of the compressor if the air conditioner is in heating mode.

[0035] Parameter determination module: used to determine the second gas injection adjustment parameter of the compressor based on the input flow temperature, the return gas pressure and the gas injection pressure;

[0036] Adjustment module: used to adjust the gas supply flow rate of the compressor according to the first gas supply adjustment parameter and the second gas supply adjustment parameter.

[0037] Thirdly, this application also provides an air conditioning system applied to any of the compressor gas replenishment control methods described above, the system comprising: a compressor, a first heat exchanger, a second heat exchanger, a separator, a first pressure sensor, a second pressure sensor, and a control valve assembly;

[0038] The compressor, the first heat exchanger, the separator, and the second heat exchanger form a first circulation loop;

[0039] The compressor, the first heat exchanger or the second heat exchanger, and the separator form a second circulation loop;

[0040] The control valve assembly is located at at least one port of the separator;

[0041] The first pressure sensor is located at the return gas end of the compressor, and the second pressure sensor is located at the end where the compressor connects to the separator.

[0042] In one possible implementation of this application, the control valve assembly includes a first electronic expansion valve and a second electronic expansion valve. The first electronic expansion valve is located at a first port of the separator, the second electronic expansion valve is located at a second port of the separator, and the second pressure sensor is located on a refrigerant pipe connecting the gas supply port of the separator and the gas supply end of the compressor.

[0043] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, the computer program being loaded by a processor to perform the steps in any of the compressor gas replenishment control methods described herein.

[0044] This application provides a compressor gas replenishment control method, device, air conditioning system, and storage medium. It obtains the compressor's return gas pressure and temperature, and determines a first gas replenishment adjustment parameter based on these parameters. If the air conditioning system is in heating mode, it obtains the separator's input flow rate temperature and the compressor's gas replenishment pressure, and determines a second gas replenishment adjustment parameter based on these parameters. Then, it adjusts the compressor's gas replenishment flow rate based on the first and second gas replenishment adjustment parameters. By analyzing the compressor's return gas pressure, return gas temperature, separator's input flow rate temperature, and gas replenishment pressure, and then adjusting the compressor's gas replenishment flow rate accordingly, this method abandons traditional compressor gas replenishment control methods, ensuring compressor gas replenishment control accuracy and thus improving air conditioning performance. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of the air conditioning system in the implementation scheme of this application;

[0047] Figure 2 This is a schematic flowchart of an embodiment of the compressor gas injection control method provided in this application.

[0048] Figure 3 A schematic flowchart illustrating an implementation scheme for determining the second gas supply adjustment parameter in the compressor gas supply control method of this application;

[0049] Figure 4 This is a schematic flowchart of an implementation scheme for adjusting the compressor's make-up air volume in the compressor make-up air control method of this application.

[0050] Figure 5 A schematic flowchart illustrating an implementation scheme for determining the first gas supply adjustment parameter in the compressor gas supply control method of this application;

[0051] Figure 6 This is a schematic flowchart of another embodiment of the compressor gas injection control method of this application.

[0052] Figure 7 This is a schematic diagram of one embodiment of the compressor gas supply control device in this application.

[0053] Figure 8 This is a schematic diagram of the structure of the air conditioning system control device in the embodiments of this application.

[0054] In the picture:

[0055] 1. Compressor; 2. First heat exchanger; 3. Second heat exchanger; 4. Separator; 50. First electronic expansion valve; 51. Second electronic expansion valve; 6. First pressure sensor; 7. Second pressure sensor; 8. Four-way valve. Detailed Implementation

[0056] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0057] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0058] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0059] This application provides a compressor gas replenishment control method, device, air conditioning system, and computer-readable storage medium, which will be described in detail below.

[0060] The compressor gas replenishment control method in this embodiment of the invention is applied to a compressor gas replenishment control device, which is installed in an air conditioning system. The air conditioning system includes one or more processors, a memory, and one or more application programs. The one or more application programs are stored in the memory and configured to be executed by the processor to implement the compressor gas replenishment control method. It is understood that the one or more processors and memory in the air conditioning system can be integrated onto the air conditioner control circuit board.

[0061] For details, see Figure 1 , Figure 1The diagram below illustrates the structure of an air conditioning system according to an embodiment of this application. The air conditioning system includes: a compressor 1, a first heat exchanger 2, a second heat exchanger 3, a separator 4, a first pressure sensor 6, a second pressure sensor 7, and a control valve assembly. The compressor 1, the first heat exchanger 2, the separator 4, and the second heat exchanger 3 form a first circulation loop. The compressor 1, the first heat exchanger 2, or the second heat exchanger 3, and the separator 4 form a second circulation loop. The control valve assembly is located at at least one port of the separator 4. The first pressure sensor is located at the return gas end of the compressor 1, and the second pressure sensor 7 is located at the end where the compressor 1 connects to the separator 4.

[0062] It is understood that the separator 4 is provided with two flow ports and one gas supply port, and the compressor 1 is provided with an exhaust port, a return port and a gas supply port. One of the two flow ports of the separator 4 is connected to the return port of the compressor 1, and the other flow port is connected to the exhaust port of the compressor 1. The gas supply port is connected to the gas supply port of the compressor 1. It is further understood that this application does not make a specific limitation on which of the two flow ports is connected to the return port of the compressor 1 or the exhaust port of the compressor 1, but can be adjusted according to the heating or cooling work of the air conditioner.

[0063] Specifically, the compressor 1, the first heat exchanger 2, the separator 4, and the second heat exchanger 3 form a first circulation loop. That is, the exhaust port / return port of the compressor 1 is connected to the first end of the first heat exchanger 2, the second end of the first heat exchanger 2 is connected to the first flow port of the separator 4, the second flow port of the separator 4 is connected to the first end of the second heat exchanger 3, and the second end of the second heat exchanger 3 is connected to the return port / exhaust port of the compressor 1.

[0064] It is understood that when the exhaust port of the compressor 1 is connected to the first heat exchanger 2, the return port of the compressor 1 is connected to the second heat exchanger 3, and when the exhaust port of the compressor 1 is connected to the second heat exchanger 3, the return port of the compressor 1 is connected to the first heat exchanger 2. Specifically, the connection between the exhaust port of the compressor 1 and the first heat exchanger 2 / second heat exchanger 3 can be adjusted according to the multi-way valve.

[0065] For details, see Figure 1In this embodiment of the application, the air conditioning system includes a four-way valve 8, which includes a first valve port, a second valve port, a third valve port, and a fourth valve port. The first valve port is connected to the exhaust port of the compressor 1, the second valve port is connected to the return port of the compressor 1, the third valve port is connected to the first end of the first heat exchanger 2, and the fourth valve port is connected to one end of the second heat exchanger 3. When the first valve port and the third valve port are connected, the second valve port and the fourth valve port are connected. When the first valve port and the fourth valve port are connected, the second valve port and the third valve port are connected. This realizes the connection adjustment between the exhaust port of the compressor 1 and the first heat exchanger 2 / second heat exchanger 3.

[0066] Specifically, the compressor 1, the first heat exchanger 2 or the second heat exchanger 3, and the separator 4 form a second circulation loop. That is, when the compressor 1 discharges, the discharge port of the compressor 1 is connected to the first end of the first heat exchanger 2, the second end of the first heat exchanger 2 is connected to a flow port of the separator 4, and the gas supply port of the separator 4 is connected to the gas supply port of the compressor 1, thus forming a second circulation loop; when the compressor 1 discharges, the discharge port of the compressor 1 is connected to the first end of the second heat exchanger 3, the second end of the second heat exchanger 3 is connected to a flow port of the separator 4, and the gas supply port of the separator 4 is connected to the gas supply port of the compressor 1, thus forming a second circulation loop.

[0067] The control valve assembly is used to control the refrigerant flow rate in the circulation loop. Specifically, the control valve assembly may include at least one electronic expansion valve, or at least one throttle valve, speed control valve, etc., and may be designed according to factors such as actual control adoption and operating environment.

[0068] Specifically, the control valve assembly is located at at least one port of the separator 4. That is, the control valve assembly may include at least one control valve located at at least one port of the separator 4. It is understood that in some embodiments of this application, the control valve assembly includes an electronic expansion valve located at one end of the gas supply port of the separator 4, that is, on the refrigerant pipeline connecting one end of the gas supply port of the separator 4 to the gas supply port of the compressor 1, for controlling the gas supply flow between the gas supply port and the gas supply port.

[0069] In the embodiments of this application, the control valve assembly includes a first electronic expansion valve 50 and a second electronic expansion valve 51. The first electronic expansion valve 50 is located at the first port of the separator 4, the second electronic expansion valve 51 is located at the second port of the separator 4, and the second pressure sensor is located on the refrigerant pipeline connecting the gas supply port of the separator 4 and the gas supply end of the compressor 1.

[0070] Specifically, in the embodiments of this application, the first heat exchanger 2 is an indoor finned evaporator, the second heat exchanger 3 is an outdoor finned evaporator, the separator 4 is provided with a first electronic expansion valve 50 with a flow port as the first port, the separator 4 is provided with a second electronic expansion valve 51 with a flow port as the second port, wherein the first port is connected to the second heat exchanger 3, the first electronic expansion valve 50 is provided on the refrigerant pipeline connecting the second heat exchanger 3 and the first port, the second port is connected to the first heat exchanger 2, and the second electronic expansion valve 51 is provided on the refrigerant pipeline connecting the first heat exchanger 2 and the first port.

[0071] Furthermore, the first pressure sensor 6 is installed on the refrigerant pipe at the return port of the compressor 1 to obtain the return pressure of the compressor 1, and the second pressure sensor is installed on the refrigerant pipe connecting the gas supply port of the compressor 1 and the gas supply port of the separator 4 to obtain the gas supply pressure of the compressor 1.

[0072] Specifically, in the embodiments of this application, the separator 4 is a flash evaporator.

[0073] Furthermore, in this embodiment of the application, the air conditioning system further includes a temperature detection device, such as a temperature sensor, a temperature sensing bulb, etc. In this embodiment of the application, the air conditioning system further includes a temperature sensing bulb, which is located at the second port of the separator 4 and is used to detect the input flow temperature of the separator 4 when the air conditioner is heating. The temperature sensing bulb is also located at the return port of the compressor 1 to detect the return air temperature of the compressor 1, thereby realizing the detection of the input flow temperature of the separator 4 and the exhaust temperature of the compressor 1, and is used to adjust the make-up air volume.

[0074] Specifically, the implementation scheme of this application provides an air conditioning system. In application, by acquiring the compressor's return gas pressure and return gas temperature, and based on these parameters, a first gas replenishment adjustment parameter for the compressor is determined. If the air conditioning operating mode is heating mode, the input flow temperature of the separator and the compressor's gas replenishment pressure are acquired. Based on these parameters, a second gas replenishment adjustment parameter for the compressor is determined. Then, the gas replenishment flow rate of the compressor is adjusted according to the first and second gas replenishment adjustment parameters. By acquiring and analyzing the compressor's return gas pressure, return gas temperature, separator input flow temperature, and gas replenishment pressure, the gas replenishment adjustment parameters are obtained. The gas replenishment flow rate of the compressor is then adjusted based on these parameters, abandoning the traditional compressor gas replenishment control method, ensuring the accuracy of compressor gas replenishment control, and thus improving the air conditioning's operating performance.

[0075] Based on the above air conditioning system, an embodiment of the compressor gas replenishment control method is proposed.

[0076] like Figure 2 The diagram shown is a flowchart of an embodiment of the compressor gas replenishment control method in this application. This compressor gas replenishment control method is applied to the air conditioning system described in any of the above embodiments. Specifically, the method includes steps S201-S204:

[0077] S201. Obtain the return gas pressure and return gas temperature of the compressor, and determine the first gas replenishment adjustment parameter of the compressor based on the return gas temperature and the return gas pressure.

[0078] The compressor return pressure, i.e., the pressure at the compressor's return port, can be acquired by a pressure sensor installed at the compressor's return port. In this embodiment, the return pressure is acquired by a first pressure sensor installed at the compressor's return port.

[0079] The compressor return gas temperature is the temperature at the compressor's return gas inlet, which is obtained by a temperature sensor installed at the compressor's exhaust port.

[0080] The first gas replenishment adjustment parameter is a parameter used to control the output flow rate of the gas replenishment port of the separator, i.e., the input flow rate of the compressor's gas replenishment port. Specifically, in this embodiment, the first gas replenishment adjustment parameter is used to control the valve opening of the control valve assembly in the air conditioning system.

[0081] Specifically, this application does not specifically limit the implementation scheme for determining the first gas injection adjustment parameter of the compressor based on the obtained return gas pressure and return gas temperature of the compressor, but may include, for example:

[0082] One feasible implementation scheme is to directly find the first gas replenishment adjustment parameter of the compressor corresponding to the return gas temperature and return gas pressure according to the preset mapping relationship.

[0083] Implementation scheme two: Calculate the corresponding superheat or subcooling based on the return gas temperature and return gas pressure, and calculate the corresponding first gas replenishment adjustment parameter based on the superheat or subcooling.

[0084] S202. If the air conditioner's operating mode is heating mode, then obtain the input flow rate and temperature of the separator and the gas supply pressure of the compressor.

[0085] The air conditioner operates in two modes: cooling and heating. When the air conditioner is in heating mode, the flow port (second port) connecting the separator to the indoor heat exchanger (first heat exchanger) is the input port of the separator. The input flow temperature of the separator can be obtained using a flow temperature detection device (temperature sensor) installed at the input port. The compressor's gas supply pressure can be collected by a pressure sensor located at one end of the compressor's gas supply port. In this embodiment, the compressor's gas supply pressure is collected using pressure sensor 2.

[0086] S203. Determine the second gas supply adjustment parameter of the compressor based on the input flow temperature, the return gas pressure, and the gas supply pressure.

[0087] Specifically, the second gas replenishment adjustment parameter is an adjustment parameter for a device used to control the output flow rate of the gas replenishment port of the separator, i.e., the input flow rate of the compressor's gas replenishment port. Specifically, in this embodiment, the second gas replenishment adjustment parameter is used to control the valve opening degree of the control valve assembly in the air conditioning system.

[0088] It is understood that the second gas replenishment adjustment parameter can be determined by looking up the input flow rate temperature, the return gas pressure and the gas replenishment pressure according to a preset mapping table, or it can be calculated and converted according to a preset calculation and conversion rule.

[0089] S204. Adjust the gas supply flow rate of the compressor according to the first gas supply adjustment parameter and the second gas supply adjustment parameter.

[0090] Specifically, after obtaining the first and second gas supply adjustment parameters, the control device of the air conditioning system performs parameter conversion on the first and second gas supply adjustment parameters, such as mapping conversion or calculation rule conversion, and converts the first and second gas supply adjustment parameters into the valve opening degree corresponding to the control valve assembly, thereby adjusting the output flow of the gas supply port of the separator, that is, the input flow of the compressor gas supply port.

[0091] Further, see Figure 3 , Figure 3 A schematic flowchart illustrating the determination of the second gas supply adjustment parameter in the compressor gas supply control method of this application includes steps S301-S304:

[0092] S301. Calculate the target subcooling degree of the compressor based on the return gas pressure and the input flow rate temperature.

[0093] Specifically, the target subcooling, which is the difference between the temperature of the refrigerant in the air conditioning system and the saturation temperature at the corresponding pressure, can be understood as follows: in heating mode, the saturation temperature corresponding to the return gas pressure is found by using the return gas pressure of the compressor and a preset mapping table of pressure and temperature. Then, the temperature difference between the input flow temperature and the saturation temperature is calculated, and the temperature difference value is set as the target subcooling.

[0094] S302. Determine the first flow rate sub-parameter at the input end of the separator based on the relationship between the target subcooling degree and the preset cooling degree corresponding to the heating mode.

[0095] Wherein, the first flow rate sub-parameter is the flow rate regulation sub-parameter of the control valve assembly corresponding to the target subcooling degree. The first flow rate sub-parameter can be an opening value, an opening regulation weight, etc. Specifically, the method for determining the first flow rate sub-parameter is as follows:

[0096] One feasible implementation scheme: Based on the difference between the target subcooling and the preset cooling corresponding to the heating mode, look up the corresponding mapping table and determine the first flow sub-parameter corresponding to the difference between the target subcooling and the heating mode.

[0097] A feasible implementation scheme two: Based on the difference between the target subcooling and the preset cooling corresponding to the heating mode, the difference level is determined according to the difference range to which the difference belongs, and the first flow sub-parameter corresponding to the difference between the target subcooling and the heating mode is determined according to the difference level.

[0098] Implementation scheme three: If the difference between the target subcooling degree and the preset cooling degree corresponding to the heating mode exceeds the preset difference range, it is determined whether the difference should be adjusted. If it should be adjusted, specific adjustments are made based on the difference.

[0099] Specifically, in this embodiment, the separator has a first electronic expansion valve at its first port and a second electronic expansion valve at its second port. The first port is connected to a second heat exchanger. The first electronic expansion valve is located on a refrigerant pipe connecting the second heat exchanger and the first port. The second port is connected to the first heat exchanger. The second electronic expansion valve is located on a refrigerant pipe connecting the first heat exchanger and the first port. The first heat exchanger is an indoor finned evaporator, and the second heat exchanger is an outdoor finned evaporator. Specifically, the first flow rate sub-parameter is the valve opening to be adjusted for the second electronic expansion valve.

[0100] Specifically, assuming the preset subcooling is SHc3, the target subcooling is SH3, and X and Y are preset constants, for example, X can be 1℃, 2℃, etc., and Y can be 1, 0.5, 2, etc., then:

[0101] When SH3 > SHc3 + X, the second electronic expansion valve is to be opened by Y*(SHc3-SH3)P from the current opening degree; where P is the opening degree unit and the first flow sub-parameter is Y*(SHc3-SH3).

[0102] When SH3 < SHc3-X, the second electronic expansion valve is to be opened by Y*(SHc3-SH3)P from the current opening degree, and the first flow sub-parameter is Y*(SHc3-SH3).

[0103] When SHc3-X≤SH3≤SHc3+X, the second electronic expansion valve maintains its current opening, i.e., the first flow sub-parameter is 0.

[0104] S303. Determine the second flow sub-parameter of the input end of the separator based on the relationship between the pressure difference between the return gas pressure and the replenishment gas pressure and the preset pressure difference.

[0105] Wherein, the second flow sub-parameter is the flow regulation sub-parameter of the control valve assembly corresponding to the pressure difference between the return gas pressure and the replenishment gas pressure. The second flow sub-parameter can be an opening value, an opening regulation weight, etc. Specifically, in the embodiment of this application, the second flow sub-parameter is the valve opening to be adjusted of the second electronic expansion valve.

[0106] Specifically, assuming the preset pressure difference value is ΔPc, the pressure difference between the return gas pressure and the replenishment gas pressure is ΔP, and A and B are preset constants, such as A being 0.1 MPa, 0.5 MPa, etc., and B being 1, 0.5, 2, etc., and the preset pressure difference ΔPc = 0.2 MPa, ΔPc = 0.5 MPa, etc.; then:

[0107] When ΔP > ΔPc + A, the second electronic expansion valve will be opened to a smaller value of B*(ΔP - ΔPc)P from its current opening, i.e., the second flow sub-parameter is B*(ΔP - ΔPc).

[0108] When ΔP < ΔPc - A, the second electronic expansion valve is to be opened by B*(ΔPc - ΔP)P from the current opening, that is, the second flow sub-parameter is B*(ΔPc - ΔP).

[0109] When △Pc-A≤△Pc≤△Pc+A, the second electronic expansion valve maintains its current opening, that is, the second flow sub-parameter is 0;

[0110] S304. Determine the second air supply adjustment parameter based on the first flow rate sub-parameter and the second flow rate sub-parameter.

[0111] Specifically, the second air replenishment adjustment parameter is the target valve opening of the second electronic expansion valve to be adjusted, which is obtained by fusing the first flow rate sub-parameter and the second flow rate sub-parameter.

[0112] It is understood that the fusion method can be achieved through addition, weighting, etc. Specifically, in the embodiment of this application: after obtaining the first flow sub-parameter and the second flow sub-parameter, the air conditioning system processing device corrects the first flow sub-parameter and the second flow sub-parameter respectively, and then obtains the second gas replenishment adjustment parameter based on the corrected first flow sub-parameter and the second flow sub-parameter, specifically including:

[0113] (1) Based on the configuration parameters of the compressor and the separator, find the preset mapping table corresponding to the configuration and weight in the heating mode, and determine the preset weight of subcooling and the preset weight of differential pressure corresponding to the configuration parameters;

[0114] (2) The first flow sub-parameter is corrected according to the subcooling preset weight in the heating mode;

[0115] (3) Correct the second flow sub-parameter according to the preset weight of the pressure difference under the heating mode;

[0116] (4) Combine the corrected first flow rate sub-parameter and the corrected second flow rate sub-parameter to determine the second gas replenishment adjustment parameter.

[0117] Specifically, the compressor configuration parameters can be the compressor's rated flow rate, the compressor's refrigerant charge, etc., and the separator configuration parameters can be, for example, the size of the separator. Based on the influence of subcooling and differential pressure on the separator's input flow rate under these configuration parameters in heating mode, a preset mapping table corresponding to the configuration and weight in heating mode is determined. In application, based on the configuration parameters of the compressor and the separator, the preset mapping table corresponding to the configuration and weight in heating mode is searched to determine the preset subcooling weight and differential pressure weight corresponding to the configuration parameters.

[0118] Specifically, for example, the second gas replenishment adjustment parameter is ΔP(n), which is the actual change in the opening of the electronic expansion valve 2; the first flow sub-parameter is ΔP1(n), which is the change in valve opening caused by subcooling, and G1 is the subcooling preset weight; the second flow sub-parameter is ΔP2(n), which is the change in valve opening caused by the intermediate pressure difference, and G2 is the pressure difference preset weight; then the formula for calculating the actual opening change is:

[0119] △P(n)=G1*△P1(n)+G2*△P2(n).

[0120] For details, see Figure 4 , Figure 4 This is a schematic flowchart of an embodiment of the compressor make-up air control method for the present application, which includes steps S401-S403:

[0121] S401. Obtain the input flow rate of the separator and the output flow rate of the separator connected to the return port of the compressor.

[0122] Specifically, the input flow rate of the separator is the flow rate at the input port of the separator in heating mode. It can be obtained by a flow detection device installed on the refrigerant pipe connecting the separator and the indoor fin sensor, or it can be determined according to the valve opening of the second electronic expansion valve. It can be understood that the valve opening of the second electronic expansion valve corresponds to the flow rate at the input port of the separator in heating mode.

[0123] Specifically, the output flow rate of the separator connected to the compressor return port is the flow rate of the compressor, that is, the flow rate of the separator connected to the outdoor finned evaporator in heating mode. This can be obtained by a flow detection device installed on the refrigerant pipeline connecting the separator and the outdoor finned sensor, or it can be determined according to the valve opening of the first electronic expansion valve. It can be understood that the valve opening of the first electronic expansion valve corresponds to the flow rate of the separator's output port in heating mode.

[0124] S402. Calculate the target input flow rate based on the second air replenishment adjustment parameter and the input flow rate. If the target input flow rate does not exceed the preset flow rate range, control the input of the separator based on the target input flow rate.

[0125] Specifically, in the embodiments of this application, the second gas replenishment adjustment parameter is the valve opening to be adjusted of the second electronic expansion valve in the heating mode. Specifically, in the embodiments of this application, the second gas replenishment adjustment parameter and the input flow rate are added together to obtain the target input flow rate, which corresponds to the target valve opening, i.e., the target valve opening of the second electronic expansion valve.

[0126] S403. Calculate the target output flow rate based on the first air replenishment adjustment parameter and the output flow rate. If the target output flow rate does not exceed the preset flow rate range, control the output of the separator based on the target output flow rate.

[0127] Specifically, in the embodiments of this application, the first gas replenishment adjustment parameter is the valve opening to be adjusted of the first electronic expansion valve in the heating mode. Specifically, in the embodiments of this application, the first gas replenishment adjustment parameter and the output flow are added together to obtain the target output flow, which corresponds to the target valve opening of the first electronic expansion valve.

[0128] Specifically, after obtaining the valve opening degree of the first electronic expansion valve and the second electronic expansion valve, the valve opening degree of the first electronic expansion valve and the second electronic expansion valve is judged according to the preset valve opening degree range. If the valve opening degree of the first electronic expansion valve and the second electronic expansion valve is within the preset valve opening degree range, the first electronic expansion valve and the second electronic expansion valve are controlled to adjust according to the corresponding valve opening degree. It can be understood that the preset flow range is not specifically limited, for example, the valve opening degree is 88P to 480P.

[0129] For details, see Figure 5 , Figure 5 A schematic flowchart illustrating the determination of the first gas supply adjustment parameter in the compressor gas supply control method of this application includes steps S501-S503:

[0130] S501. According to the preset mapping table of pressure and temperature, find the target saturation temperature corresponding to the return gas pressure;

[0131] S502. Calculate the target superheat of the compressor based on the target saturation temperature and the return gas temperature;

[0132] S503. Determine the first gas injection adjustment parameter of the compressor based on the target superheat and the preset superheat corresponding to the air conditioner working mode.

[0133] It is understandable that when the air conditioning system is heating, the first gas injection adjustment parameter of the compressor is determined based on the target subcooling degree and the preset cooling degree corresponding to the air conditioning working mode. When the air conditioning system is cooling, the first gas injection adjustment parameter of the compressor is determined based on the target superheat degree and the preset superheat degree corresponding to the air conditioning working mode.

[0134] Specifically, the target superheat SH1 = return gas temperature - saturation temperature Te corresponding to the return gas pressure, and the preset superheat SHc1 is adjusted as follows:

[0135] When SH1 < SHc1 - X, the current opening is reduced by Y*(SHc1 - SH1)P, that is, the first air replenishment adjustment parameter is Y*(SHc1 - SH1)P;

[0136] When SH1 > SHc1 + X, the opening is increased by Y*(SH1 - SHc1)P from the current opening, that is, the first air replenishment adjustment parameter is Y*(SH1 - SHc1)P;

[0137] When SHc1-X≤SH1≤SHc1+X, maintain the current opening degree, that is, the first air replenishment adjustment parameter is 0.

[0138] Specifically, in the embodiments of this application, the first air replenishment adjustment parameter is the opening degree to be adjusted of the electronic expansion valve. In the embodiments of this application, the maximum number of steps for each adjustment of the first air replenishment adjustment parameter is 10P, that is, the first air replenishment adjustment parameter is not greater than 10P. Specifically, in the embodiments of this application, it is adjusted once every 30 seconds. It can be understood that in other embodiments of this application, the adjustment frequency and the maximum adjustment threshold of the first air replenishment adjustment parameter can be set according to actual needs.

[0139] In the embodiments of this application, the preset superheat corresponding to the air conditioning working mode of the air conditioning system in the cooling mode and heating mode is the same. It is understood that in other embodiments of this application, the preset superheat corresponding to the air conditioning working mode of the air conditioning system in the cooling mode and heating mode may be different.

[0140] Specifically, when the air conditioning system is in cooling mode, the first gas replenishment adjustment parameter is used to adjust the electronic expansion valve 2; when the air conditioning system is in heating mode, the first gas replenishment adjustment parameter is used to adjust the electronic expansion valve 1.

[0141] For details, see Figure 6 , Figure 6 This is a schematic flowchart of another embodiment of the compressor gas supply control method of this application, including steps S601-S603:

[0142] S601. Obtain the return gas pressure and return gas temperature of the compressor, and determine the first gas replenishment adjustment parameter of the compressor based on the return gas temperature and the return gas pressure.

[0143] S602. If the air conditioner is in cooling mode, then adjust the input of the separator according to the preset adjustment parameters.

[0144] Specifically, the prime number preset adjustment parameter is the preset opening degree of the first electronic expansion valve, and the first electronic expansion valve adjusts the input flow rate at the input end of the separator in the refrigeration mode according to the preset adjustment parameter.

[0145] S603. Adjust the output of the separator according to the first air replenishment adjustment parameter.

[0146] Specifically, when the air conditioner is in cooling mode, the electronic expansion valve 1 is controlled at a fixed opening degree according to preset adjustment parameters, and the electronic expansion valve 2 is controlled according to the return gas superheat, that is, according to the first gas replenishment adjustment parameter, to adjust the output of the separator. The control of the first gas replenishment adjustment parameter is as described above.

[0147] This application provides a compressor gas replenishment control method. It acquires the compressor's return gas pressure and return gas temperature, and determines a first gas replenishment adjustment parameter based on these parameters. If the air conditioner's operating mode is heating, it acquires the separator's input flow rate temperature and the compressor's gas replenishment pressure, and determines a second gas replenishment adjustment parameter based on these parameters. Then, it adjusts the compressor's gas replenishment flow rate according to the first and second gas replenishment adjustment parameters. By acquiring and analyzing the compressor's return gas pressure, return gas temperature, separator's input flow rate temperature, and gas replenishment pressure to obtain the compressor's gas replenishment adjustment parameters, and then adjusting the compressor's gas replenishment flow rate based on these parameters, this method abandons traditional compressor gas replenishment control methods, ensuring compressor gas replenishment control accuracy and thus improving air conditioner performance.

[0148] To better implement the compressor gas replenishment control method in the embodiments of this application, based on the compressor gas replenishment control method, the embodiments of this application also provide a compressor gas replenishment control device. The compressor gas replenishment control device is applied to the air conditioning system in any of the above embodiments, such as... Figure 7 As shown, the compressor gas replenishment control device includes modules 701-704:

[0149] First acquisition module 701: used to acquire the return gas pressure and return gas temperature of the compressor, and determine the first gas replenishment adjustment parameter of the compressor based on the return gas temperature and the return gas pressure;

[0150] The second acquisition module 702 is used to acquire the input flow temperature of the separator and the gas supply pressure of the compressor if the working mode of the air conditioner is heating mode.

[0151] Parameter determination module 703: used to determine the second gas supply adjustment parameter of the compressor based on the input flow temperature, the return gas pressure and the gas supply pressure;

[0152] Adjustment module 704: used to adjust the gas supply flow rate of the compressor according to the first gas supply adjustment parameter and the second gas supply adjustment parameter.

[0153] In one embodiment of this application, the parameter determination module 703 is used to determine a second gas supply adjustment parameter for the compressor based on the input flow temperature, the return gas pressure, and the gas supply pressure, specifically including:

[0154] The target subcooling degree of the compressor is calculated based on the return gas pressure and the input flow rate temperature.

[0155] Based on the relationship between the target subcooling and the preset cooling degree corresponding to the heating mode, the first flow sub-parameter of the separator's input end is determined;

[0156] The second flow rate sub-parameter at the input end of the separator is determined based on the relationship between the pressure difference between the return gas pressure and the make-up gas pressure and the preset pressure difference value.

[0157] The second air supply adjustment parameter is determined based on the first flow rate sub-parameter and the second flow rate sub-parameter.

[0158] In one embodiment of this application, before determining the second air injection adjustment parameter based on the first flow rate sub-parameter and the second flow rate sub-parameter, the parameter determination module 703 further includes:

[0159] Based on the configuration parameters of the compressor and the separator, the preset mapping table corresponding to the configuration and weight in the heating mode is searched to determine the preset subcooling weight and preset pressure difference weight corresponding to the configuration parameters.

[0160] The parameter determination module 703 is used to determine the second air supply adjustment parameter based on the first flow rate sub-parameter and the second flow rate sub-parameter, specifically including:

[0161] The first flow sub-parameter is corrected according to the subcooling preset weight in the heating mode;

[0162] The second flow sub-parameter is corrected according to the preset weight of the pressure difference under the heating mode;

[0163] The corrected first flow rate sub-parameter and the corrected second flow rate sub-parameter are combined to determine the second gas injection adjustment parameter.

[0164] In one embodiment of this application, the adjustment module 704 is used to adjust the gas supply flow rate of the compressor according to the first gas supply adjustment parameter and the second gas supply adjustment parameter, specifically including:

[0165] Obtain the input flow rate of the separator and the output flow rate of the separator connected to the compressor return port;

[0166] The target input flow rate is calculated based on the second air replenishment adjustment parameter and the input flow rate. If the target input flow rate does not exceed the preset flow rate range, the input of the separator is controlled based on the target input flow rate.

[0167] The target output flow rate is calculated based on the first air replenishment adjustment parameter and the output flow rate. If the target output flow rate does not exceed the preset flow rate range, the output of the separator is controlled based on the target output flow rate.

[0168] In one embodiment of this application, the first acquisition module 701 is used to acquire the return gas pressure and return gas temperature of the compressor, and determine the first gas supply adjustment parameter of the compressor based on the return gas temperature and the return gas pressure, specifically including:

[0169] According to the preset mapping table of pressure and temperature, find the target saturation temperature corresponding to the return gas pressure;

[0170] Calculate the target superheat of the compressor based on the target saturation temperature and the return gas temperature;

[0171] The first gas injection adjustment parameter of the compressor is determined based on the target superheat and the preset superheat corresponding to the air conditioner's operating mode.

[0172] In one embodiment of this application, the first acquisition module 701 is used to acquire the return gas pressure and return gas temperature of the compressor, and after determining the first gas supply adjustment parameter of the compressor based on the return gas temperature and the return gas pressure, the adjustment module 704 further includes a function for:

[0173] If the air conditioner is in cooling mode, the input of the separator is adjusted according to the preset adjustment parameters.

[0174] Adjust the output of the separator according to the first air replenishment adjustment parameter.

[0175] In some embodiments of this application, the compressor gas supply control device can be implemented as a computer program, and the computer program can be implemented in, for example... Figure 8 The air conditioning system control equipment shown operates on this system. The memory of the air conditioning system control equipment can store the various program modules that make up the compressor's gas supply control device, for example... Figure 7 The first acquisition module 701, the second acquisition module 702, the parameter determination module 703, and the adjustment module 704 are shown. The computer program, comprised of these modules, causes the processor to execute the steps of the compressor gas replenishment control method described in the various embodiments of this application.

[0176] For example, Figure 8 The air conditioning system control equipment shown can be controlled by, for example Figure 7The first acquisition module 701 in the compressor gas replenishment control device shown executes step S201. The air conditioning system control device can execute step S202 through the second acquisition module 702. The air conditioning system control device can execute step S203 through the parameter determination module 703. The air conditioning system control device can execute step S204 through the adjustment module 704. The air conditioning system control device includes a processor, a memory, and a network interface connected via a system bus. The processor of the air conditioning system control device provides computing and control capabilities. The memory of the air conditioning system control device includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The network interface of the air conditioning system control device is used for communication with external air conditioning system control devices via a network connection. When the computer program is executed by the processor, it implements a compressor gas replenishment control method.

[0177] This application provides a compressor gas replenishment control device. It acquires the compressor's return gas pressure and return gas temperature, and determines a first gas replenishment adjustment parameter based on these parameters. If the air conditioner's operating mode is heating, it acquires the separator's input flow rate temperature and the compressor's gas replenishment pressure, and determines a second gas replenishment adjustment parameter based on these parameters. Then, it adjusts the compressor's gas replenishment flow rate according to the first and second gas replenishment adjustment parameters. By acquiring and analyzing the compressor's return gas pressure, return gas temperature, separator's input flow rate temperature, and gas replenishment pressure to obtain the compressor's gas replenishment adjustment parameters, and then adjusting the compressor's gas replenishment flow rate based on these parameters, this method abandons traditional compressor gas replenishment control methods, ensuring compressor gas replenishment control accuracy and thus improving air conditioner performance.

[0178] Those skilled in the art will understand that Figure 8 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the air conditioning system control equipment to which the present application is applied. The specific air conditioning system control equipment may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0179] In some embodiments of this application, an air conditioning system control device is provided, including one or more processors; a memory; and one or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the processor as described in the compressor replenishment control method. The steps of the compressor replenishment control method here can be the steps in the compressor replenishment control methods of the various embodiments described above. The terminal can be an indoor unit of an air conditioner.

[0180] In some embodiments of this application, a computer-readable storage medium is provided, storing a computer program. The computer program is loaded by a processor, causing the processor to execute the steps of the above-described compressor gas replenishment control method. The steps of the compressor gas replenishment control method here can be the steps in the compressor gas replenishment control methods of the various embodiments described above.

[0181] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical storage, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0182] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0183] The above provides a detailed description of a compressor gas replenishment control method, device, air conditioning system, and storage medium provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method of compressor boost control, the method comprising: The air conditioning system includes a compressor, a separator connected to the compressor's air inlet, air outlet and exhaust outlet, a first heat exchanger, a second heat exchanger, a first pressure sensor, a second pressure sensor, and a control valve assembly. Wherein, the compressor, the first heat exchanger, the separator, and the second heat exchanger form a first circulation loop; the compressor, the first heat exchanger or the second heat exchanger, and the separator form a second circulation loop; the control valve assembly is located at at least one port of the separator; the first pressure sensor is located at the return gas end of the compressor, and the second pressure sensor is located at the end of the compressor connected to the separator; The control valve assembly includes a first electronic expansion valve and a second electronic expansion valve. The first electronic expansion valve is located at the first port of the separator, and the second electronic expansion valve is located at the second port of the separator. The second pressure sensor is located on the refrigerant pipe connecting the gas supply port of the separator and the gas supply end of the compressor. The method includes: The return gas pressure and return gas temperature of the compressor are obtained, and the first gas supply adjustment parameter of the compressor is determined based on the return gas temperature and the return gas pressure. The first gas supply adjustment parameter is the valve opening of the first electronic expansion valve to be adjusted in the heating mode. If the air conditioner is in heating mode, then the input flow temperature of the separator and the refrigerant pressure of the compressor are obtained; wherein, the input flow temperature is the temperature of the refrigerant flow detected at the input end of the separator; Based on the input flow temperature, the return gas pressure, and the replenishment gas pressure, a second replenishment gas adjustment parameter for the compressor is determined, wherein the second replenishment gas adjustment parameter is the valve opening to be adjusted of the second electronic expansion valve in the heating mode; The system acquires the input flow rate of the separator and the output flow rate of the return air port of the separator connected to the compressor; calculates the target input flow rate based on the second replenishment air adjustment parameter and the input flow rate; if the target input flow rate does not exceed a preset flow rate range, the system controls the input of the separator based on the target input flow rate; calculates the target output flow rate based on the first replenishment air adjustment parameter and the output flow rate; if the target output flow rate does not exceed a preset flow rate range, the system controls the output of the separator based on the target output flow rate.

2. The compressor gas supply control method according to claim 1, characterized in that, The process of acquiring the compressor's return gas pressure and return gas temperature, and determining the compressor's first gas supply adjustment parameter based on the return gas temperature and return gas pressure, includes: According to the preset mapping table of pressure and temperature, find the target saturation temperature corresponding to the return gas pressure; Calculate the target superheat of the compressor based on the target saturation temperature and the return gas temperature; The first gas injection adjustment parameter of the compressor is determined based on the target superheat and the preset superheat corresponding to the air conditioner's operating mode.

3. The compressor gas supply control method according to any one of claims 1-2, characterized in that, After obtaining the compressor's return gas pressure and return gas temperature, and determining the compressor's first gas supply adjustment parameter based on the return gas temperature and return gas pressure, the method further includes: If the air conditioner is in cooling mode, the input of the separator is adjusted according to the preset adjustment parameters. Adjust the output of the separator according to the first air replenishment adjustment parameter.

4. A compressor gas supply control device, characterized in that, The air conditioning system includes a compressor, a separator connected to the compressor's air inlet, air outlet and exhaust outlet, a first heat exchanger, a second heat exchanger, a first pressure sensor, a second pressure sensor, and a control valve assembly. Wherein, the compressor, the first heat exchanger, the separator, and the second heat exchanger form a first circulation loop; the compressor, the first heat exchanger or the second heat exchanger, and the separator form a second circulation loop; the control valve assembly is located at at least one port of the separator; the first pressure sensor is located at the return gas end of the compressor, and the second pressure sensor is located at the end of the compressor connected to the separator; The control valve assembly includes a first electronic expansion valve and a second electronic expansion valve. The first electronic expansion valve is located at the first port of the separator, and the second electronic expansion valve is located at the second port of the separator. The second pressure sensor is located on the refrigerant pipe connecting the gas supply port of the separator and the gas supply end of the compressor. The compressor gas replenishment control device includes: First acquisition module: used to acquire the return gas pressure and return gas temperature of the compressor, and determine the first gas replenishment adjustment parameter of the compressor based on the return gas temperature and the return gas pressure, wherein the first gas replenishment adjustment parameter is the valve opening of the first electronic expansion valve to be adjusted in the heating mode; The second acquisition module is used to acquire the input flow temperature of the separator and the gas supply pressure of the compressor if the air conditioner is in heating mode; wherein, the input flow temperature is the temperature of the refrigerant flow detected at the input end of the separator; Parameter determination module: used to determine the second gas supply adjustment parameter of the compressor based on the input flow temperature, the return gas pressure and the gas supply pressure, wherein the second gas supply adjustment parameter is the valve opening of the second electronic expansion valve to be adjusted in the heating mode; Adjustment module: used to acquire the input flow rate of the separator and the output flow rate of the return gas port of the separator connected to the compressor; calculate the target input flow rate according to the second replenishment gas adjustment parameter and the input flow rate; if the target input flow rate does not exceed the preset flow rate range, control the input of the separator according to the target input flow rate; calculate the target output flow rate according to the first replenishment gas adjustment parameter and the output flow rate; if the target output flow rate does not exceed the preset flow rate range, control the output of the separator according to the target output flow rate.

5. A computer-readable storage medium, characterized in that, It stores a computer program, which is loaded by a processor to execute the steps in the compressor gas supply control method according to any one of claims 1 to 3.

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