Control method of air conditioner, air conditioner and computer readable storage medium

Abstract

The application discloses a control method of an air conditioner, the air conditioner and a computer readable storage medium. The air conditioner comprises a first indoor heat exchanger, a gas-liquid separator and a second indoor heat exchanger. The gas-liquid separator is provided with a gas-liquid inlet and a liquid outlet. The refrigerant outlet of the first indoor heat exchanger is communicated with the gas-liquid inlet. The liquid outlet is communicated with the refrigerant inlet of the second indoor heat exchanger through a first pipeline. The first pipeline is provided with a first control valve. The method comprises the following steps: acquiring a first temperature of an indoor environment when the air conditioner is in a refrigeration operation; determining the operation parameter of the first control valve of the air conditioner according to the first temperature; and controlling the first control valve to operate at the operation parameter, so that the refrigerating capacity output by the air conditioner matches the current refrigerating capacity required by the indoor environment. The application aims to realize that the refrigerating capacity output by the air conditioner meets the requirement of the indoor environment when the air conditioner is in the refrigeration operation, and improve the user comfort in the refrigeration process of the air conditioner.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and more particularly to an air conditioner control method, an air conditioner, and a computer-readable storage medium. Background Technology

[0002] With the development of economy and technology, air conditioners, as an environmental control device, are being used more and more widely in daily life.

[0003] Air conditioners are mainly used to regulate the temperature of the indoor environment. During the cooling process, air conditioners generally have two stages: a cooling stage and a heating stage. During these two stages, the operation of the indoor fan is adjusted according to the indoor temperature. During the warming process, different target temperatures are set for different stages of the air conditioner operation.

[0004] However, in this type of air conditioner's temperature control method, the cooling capacity output by the indoor heat exchanger is fixed. This can easily lead to insufficient cooling capacity during the cooling phase, resulting in excessively long cooling times, and excessive cooling capacity during the warming phase, causing large fluctuations in indoor temperature. In severe cases, this can even cause the compressor (especially a fixed-frequency compressor) to shut down. Therefore, it is evident that current air conditioner cooling operations suffer from a mismatch between the output cooling capacity and the indoor environmental demand, affecting user comfort during the cooling process. Summary of the Invention

[0005] The main objective of this invention is to provide a control method for an air conditioner, an air conditioner, and a computer-readable storage medium, aiming to enable the air conditioner to output cooling capacity to meet indoor environmental requirements during cooling operation and improve user comfort during the air conditioner's cooling process.

[0006] To achieve the above objectives, the present invention provides a control method for an air conditioner. The air conditioner includes a first indoor heat exchanger, a gas-liquid separator, and a second indoor heat exchanger. The gas-liquid separator has a gas-liquid inlet and a liquid outlet. The refrigerant outlet of the first indoor heat exchanger is connected to the gas-liquid inlet. The liquid outlet is connected to the refrigerant inlet of the second indoor heat exchanger via a first pipeline. The first pipeline is equipped with a first control valve. The control method for the air conditioner includes the following steps:

[0007] When the air conditioner is in cooling mode, the first temperature of the indoor environment is obtained;

[0008] The operating parameters of the first control valve of the air conditioner are determined based on the first temperature;

[0009] The first control valve is controlled to operate with the operating parameters so that the cooling capacity output by the air conditioner matches the cooling capacity currently required by the indoor environment.

[0010] Optionally, the gas-liquid separator is further provided with an outlet, the compressor of the air conditioner is connected to the refrigerant outlet of the second indoor heat exchanger through a second pipeline, the second pipeline is connected to the outlet through a third pipeline, and the step of determining the operating parameters of the first control valve of the air conditioner based on the first temperature includes:

[0011] When the first temperature is greater than the set temperature of the air conditioner, it is determined that the operating parameters include the opening of the first control valve;

[0012] When the first temperature is less than or equal to the set temperature, the operating parameters are determined to include the first control valve being closed.

[0013] Optionally, the third pipeline is equipped with a second control valve. When the first temperature is less than or equal to the set temperature, the step of controlling the first control valve to operate with the operating parameters is performed simultaneously or afterward, and further includes:

[0014] Obtain a second temperature of the indoor environment;

[0015] The target opening degree of the second control valve is determined based on the second temperature.

[0016] The second control valve is controlled to open at the target opening degree so that the difference between the indoor ambient temperature and the set temperature is less than the set value.

[0017] Optionally, the step of determining the target opening degree of the second control valve based on the second temperature includes:

[0018] Determine the first temperature range in which the second temperature falls;

[0019] The target opening degree is determined based on the first temperature range;

[0020] The target opening degree is positively correlated with the temperature within the first temperature range.

[0021] Optionally, the step of determining the target opening degree of the second control valve based on the second temperature includes:

[0022] Determine the temperature difference between the second temperature and the target temperature;

[0023] The target opening degree is determined based on the temperature difference value;

[0024] Wherein, the target temperature is greater than the set temperature, and the difference between the target temperature and the set temperature is less than the set value, and the target opening degree is positively correlated with the temperature difference value.

[0025] Optionally, before the step of determining the target opening degree of the second control valve based on the second temperature, the method further includes:

[0026] Obtain the third temperature of the outdoor environment;

[0027] A first correspondence between the second temperature and the target opening degree is obtained based on the third temperature;

[0028] The step of determining the target opening degree of the second control valve based on the second temperature includes:

[0029] The target opening degree corresponding to the second temperature is determined based on the first correspondence.

[0030] Optionally, before the step of obtaining the second temperature of the indoor environment, the method further includes:

[0031] When the first temperature is less than or equal to the set temperature, the second control valve is controlled to open at a preset minimum opening degree, wherein the target opening degree is greater than or equal to the preset minimum opening degree.

[0032] Optionally, the compressor is a fixed-frequency compressor, and the process of controlling the first control valve to operate with the operating parameters further includes:

[0033] When the first temperature is less than or equal to the set temperature, the fixed-frequency compressor is controlled to remain on.

[0034] Optionally, the compressor is a variable frequency compressor. During the process of controlling the first control valve to operate with the operating parameters when the first temperature is less than or equal to the set temperature, the method further includes:

[0035] Obtain the fourth temperature of the indoor environment;

[0036] The target frequency of the variable frequency compressor is determined based on the fourth temperature.

[0037] The variable frequency compressor is controlled to operate at the target frequency so that the difference between the indoor ambient temperature and the set temperature is less than the set value.

[0038] Optionally, the step of determining the target frequency of the variable frequency compressor based on the fourth temperature includes:

[0039] Determine the second temperature range in which the fourth temperature is located;

[0040] The target frequency is determined based on the second temperature range;

[0041] The target frequency is positively correlated with the temperature within the second temperature range.

[0042] Optionally, the step of determining the target frequency of the variable frequency compressor based on the fourth temperature includes:

[0043] Determine the temperature difference between the fourth temperature and the target temperature;

[0044] The target frequency is determined based on the temperature difference value;

[0045] Wherein, the target temperature is greater than the set temperature, and the difference between the target temperature and the set temperature is less than the set value, and the target frequency is positively correlated with the temperature difference value.

[0046] Optionally, before the step of determining the target frequency of the variable frequency compressor based on the fourth temperature, the method further includes:

[0047] Obtain the fifth temperature of the outdoor environment;

[0048] A second correspondence between the fourth temperature and the target frequency is obtained based on the fifth temperature;

[0049] The step of determining the target frequency of the variable frequency compressor based on the fourth temperature includes:

[0050] The target frequency corresponding to the fourth temperature is determined based on the second correspondence.

[0051] Optionally, before the step of obtaining the fourth temperature of the indoor environment, the method further includes:

[0052] When the first temperature is less than or equal to the set temperature, the compressor is controlled to operate at a preset minimum frequency, which is less than or equal to the target frequency.

[0053] Furthermore, in order to achieve the above objectives, this application also proposes an air conditioner, the air conditioner comprising:

[0054] First indoor heat exchanger;

[0055] Second indoor heat exchanger;

[0056] A gas-liquid separator is provided with a gas-liquid inlet and a liquid outlet. The refrigerant outlet of the first indoor heat exchanger is connected to the gas-liquid inlet, and the liquid outlet is connected to the refrigerant inlet of the second indoor heat exchanger through a first pipeline. The first pipeline is provided with a first control valve.

[0057] A control device, wherein the first control valve is connected to the control device, the control device comprising: a memory, a processor, and an air conditioner control program stored in the memory and executable on the processor, wherein the air conditioner control program, when executed by the processor, implements the steps of the air conditioner control method as described in any of the preceding claims.

[0058] Optionally, the gas-liquid separator is further provided with an air outlet, the compressor of the air conditioner is connected to the refrigerant outlet of the second indoor heat exchanger through a second pipeline, the second pipeline is connected to the air outlet through a third pipeline, the third pipeline is provided with a second control valve, and the second control valve is connected to the control device.

[0059] Optionally, both the first control valve and the second control valve are electronic expansion valves; or, the first control valve is a check valve and the second control valve is an electronic expansion valve.

[0060] And / or, the heat exchange area of ​​the first indoor heat exchanger is smaller than the heat exchange area of ​​the second indoor heat exchanger.

[0061] In addition, to achieve the above objectives, this application also proposes a computer-readable storage medium storing a control program for an air conditioner, which, when executed by a processor, implements the steps of the control method for the air conditioner as described in any of the preceding claims.

[0062] This invention proposes a control method for an air conditioner. This method is based on an air conditioner with a refrigerant circulation loop comprising a first indoor heat exchanger, a gas-liquid separator, and a second indoor heat exchanger connected in sequence. The refrigerant flowing into the indoor heat exchanger first undergoes heat exchange in the first indoor heat exchanger. After heat exchange, the gas-liquid mixture of refrigerant is separated in the gas-liquid separator. The separated liquid refrigerant can then enter the second indoor heat exchanger for further heat exchange. Reducing the proportion of gaseous refrigerant entering the second indoor heat exchanger improves the heat exchange efficiency of the liquid refrigerant, facilitating the release of more cooling capacity from the refrigerant into the indoor air. This method... When the air conditioner is in cooling mode, the operation of the first control valve is adjusted according to the indoor ambient temperature. Different operating states of the first control valve can result in different amounts of refrigerant flowing from the gas-liquid separator into the second indoor heat exchanger, thereby regulating the cooling capacity output by the air conditioner in the indoor heat exchanger. During this process, the cooling capacity output by the indoor heat exchanger is no longer fixed, but can be adjusted by the first control valve according to the indoor ambient temperature, thus ensuring that the output cooling capacity matches the indoor environmental demand. This ensures that the cooling capacity output by the air conditioner meets the indoor environmental demand during cooling operation, improving user comfort during the air conditioner's cooling process. Attached Figure Description

[0063] Figure 1 This is a schematic diagram of the refrigerant system structure in one embodiment of the air conditioner of the present invention;

[0064] Figure 2 This is a schematic diagram of the hardware structure involved in the operation of an embodiment of the air conditioner of the present invention;

[0065] Figure 3 This is a flowchart illustrating an embodiment of the control method for an air conditioner according to the present invention;

[0066] Figure 4 This is a flowchart illustrating another embodiment of the control method for an air conditioner according to the present invention;

[0067] Figure 5 This is a flowchart illustrating another embodiment of the control method for an air conditioner according to the present invention;

[0068] Figure 6 This is a flowchart illustrating another embodiment of the control method for the air conditioner of the present invention.

[0069] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0070] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0071] The main solution of this invention is as follows: a control method is proposed based on an air conditioner. The air conditioner includes a first indoor heat exchanger, a gas-liquid separator, and a second indoor heat exchanger. The gas-liquid separator has a gas-liquid inlet and a liquid outlet. The refrigerant outlet of the first indoor heat exchanger is connected to the gas-liquid inlet, and the liquid outlet is connected to the refrigerant inlet of the second indoor heat exchanger. A first control valve is provided between the refrigerant inlet and the liquid outlet of the second indoor heat exchanger. The control method includes: when the air conditioner is in cooling operation, acquiring a first temperature of the indoor environment; determining the operating parameters of the first control valve of the air conditioner based on the first temperature; and controlling the first control valve to operate with the operating parameters so that the cooling capacity output by the air conditioner matches the current cooling capacity required by the indoor environment.

[0072] In current technology, the temperature control method used in air conditioners during the cooling process results in a fixed cooling capacity output from the indoor heat exchanger. This can easily lead to insufficient cooling capacity during the cooling phase, resulting in excessively long cooling times, or excessive cooling capacity during the warming phase, causing large fluctuations in indoor temperature. In severe cases, this can even cause the compressor (especially a fixed-frequency compressor) to shut down. Therefore, current air conditioner cooling operations suffer from a mismatch between the output cooling capacity and the indoor environmental demand, affecting user comfort during the cooling process.

[0073] The present invention provides the above-mentioned solution, which aims to enable the air conditioner to output cooling capacity to meet the indoor environmental requirements during the cooling operation and improve user comfort during the air conditioner cooling process.

[0074] This invention provides an air conditioner. The air conditioner can be any type of air conditioner, such as a wall-mounted air conditioner, a cabinet air conditioner, a window air conditioner, a multi-split air conditioner, a ceiling-mounted air conditioner, or a portable air conditioner.

[0075] In this embodiment of the invention, reference is made to Figure 1 and Figure 2 The air conditioner includes a control device 1, a first indoor heat exchanger 21, a gas-liquid separator 3, and a second indoor heat exchanger 22. Specifically, the air conditioner includes a refrigerant circulation loop, which comprises a compressor 4, an outdoor heat exchanger 5, a throttling device 6, the first indoor heat exchanger 21, the gas-liquid separator 3, and the second indoor heat exchanger 22 connected in sequence. The refrigerant flowing out of the compressor 4 flows back to the compressor 4 after passing through the outdoor heat exchanger 5, the throttling device 6, the first indoor heat exchanger 21, the gas-liquid separator 3, and the second indoor heat exchanger 22 in sequence. Both the compressor 4 and the throttling device 6 are connected to the control device 1.

[0076] In this embodiment, compressor 4 is a fixed-frequency compressor 4 or a variable-frequency compressor 4.

[0077] In this embodiment, the heat exchange area of ​​the first indoor heat exchanger 21 is smaller than that of the second indoor heat exchanger 22, which is beneficial for improving the cooling capacity of the air conditioner. Specifically, the ratio of the heat exchange area of ​​the first indoor heat exchanger 21 to that of the second indoor heat exchanger 22 is 1:2. In other embodiments, the ratio can also be set to 1:3, 1:4, 2:3, etc. Furthermore, in other embodiments, the heat exchange area of ​​the first indoor heat exchanger 21 can also be greater than or equal to the heat exchange area of ​​the second indoor heat exchanger 22.

[0078] Among them, reference Figure 1 The gas-liquid separator 3 is provided with a gas-liquid inlet, a liquid outlet, and a gas outlet. The refrigerant inlet of the first indoor heat exchanger 21 is connected to the refrigerant outlet of the throttling device 6. The refrigerant outlet of the first indoor heat exchanger 21 is connected to the gas-liquid inlet. The liquid outlet is connected to the refrigerant inlet of the second indoor heat exchanger 22 through a first pipeline. The first pipeline is provided with a first control valve 8, which is used to control the opening and closing of the first pipeline. The first control valve 8 is connected to the control device 1.

[0079] In this embodiment, the return port of the compressor 4 of the air conditioner is connected to the refrigerant outlet of the second indoor heat exchanger 22 via a second pipeline, and the second pipeline is connected to the outlet via a third pipeline. In other embodiments, the compressor 4 may also have a make-up port in addition to the return port and the exhaust port, and the outlet of the gas-liquid separator 3 may be connected to the make-up port. Alternatively, in other embodiments, the outlet of the gas-liquid separator 3 may also be connected to other locations in the refrigerant circulation loop according to actual needs.

[0080] The third pipeline is equipped with a second control valve 9, which is used to control the opening and closing of the third pipeline.

[0081] In this embodiment, both the first control valve 8 and the second control valve 9 are electronic expansion valves. Alternatively, the first control valve 8 is a one-way valve, and the second control valve 9 is an electronic expansion valve.

[0082] When the air conditioner is in cooling mode, the first indoor heat exchanger 21 and the second indoor heat exchanger 22 are in an evaporation state. The refrigerant entering the room first evaporates in the first indoor heat exchanger 21, forming a gas-liquid mixture. This gas-liquid mixture enters the gas-liquid separator 3 for separation. The separated liquid refrigerant flows into the second indoor heat exchanger 22 for further evaporation, while the separated gaseous refrigerant flows from the first pipe into the second pipe and then back to the compressor 4. The separation function of the gas-liquid separator 3 reduces the amount of gaseous refrigerant flowing into the second indoor heat exchanger 22. This reduction in gaseous refrigerant improves the evaporation efficiency of the liquid refrigerant in the second indoor heat exchanger 22, allowing more refrigerant to evaporate and release cooling capacity, thus increasing the overall cooling capacity output by the indoor heat exchanger. On the other hand, the separation function of the gas-liquid separator 3 can replenish the compressor 4 with gas, increasing the proportion of gaseous refrigerant flowing back to the compressor 4. This prevents liquid slugging in the compressor while reducing the operating load of the compressor 4, allowing the refrigerant output by the compressor 4 to carry more energy when the operating parameters of the compressor 4 are constant, thereby effectively improving the cooling capacity of the air conditioner.

[0083] Furthermore, in this embodiment, referring to Figure 1 The air conditioner is designed to allow switching between cooling and heating modes. The refrigerant circulation loop may also include a four-way valve 7, which is connected to the control device 1. Two ports of the four-way valve 7 are connected to the exhaust port and return port of the compressor 4, respectively, and the other two ports are connected to the indoor heat exchanger and the outdoor heat exchanger 5, respectively. The four-way valve 7 has a first valve position and a second valve position. When the four-way valve 7 is in the first valve position, the air conditioner operates in cooling mode; when the four-way valve 7 is in the second valve position, the air conditioner operates in heating mode. In other embodiments, the air conditioner may also be a cooling-only type, in which case the four-way valve 7 is not included in the refrigerant circulation loop.

[0084] Furthermore, in this embodiment, referring to Figure 2 The air conditioner also includes a first temperature detection module 01, which is used to detect the indoor ambient temperature of the environment where the air conditioner is located. In this embodiment, the first temperature detection module 01 is located at the air return port of the air conditioner. In other embodiments, the first temperature detection module 01 may also be located in the external area of ​​the air conditioner within the indoor environment where the air conditioner is located. The first temperature detection module 01 is connected to the control device 1, and the control device 1 can acquire the data detected by the first temperature detection module 01.

[0085] Furthermore, in this embodiment, referring to Figure 2The air conditioner also includes a second temperature detection module 02, which is used to detect the outdoor ambient temperature of the environment where the air conditioner is located. In this embodiment, the second temperature detection module 02 is located on the outer casing of the outdoor unit of the air conditioner. In other embodiments, the second temperature detection module 02 may also be located in the external area of ​​the air conditioner in the corresponding outdoor environment. The second temperature detection module 02 is connected to the control device 1, and the control device 1 can acquire the data detected by the second temperature detection module 02.

[0086] In this embodiment of the invention, reference is made to Figure 2 The control device 1 of the air conditioner includes a processor 1001 (e.g., CPU), a memory 1002, a timer 1003, etc. The components in the control device 1 are connected via a communication bus. The memory 1002 can be a high-speed RAM or a stable, non-volatile memory, such as a disk drive. Optionally, the memory 1002 can also be a storage device independent of the aforementioned processor 1001.

[0087] Those skilled in the art will understand that Figure 2 The device structure shown does not constitute a limitation on the device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0088] like Figure 2 As shown, the memory 1002, which is a computer-readable storage medium, may include a control program for an air conditioner. Figure 2 In the device shown, the processor 1001 can be used to call the control program of the air conditioner stored in the memory 1002 and execute the relevant steps of the control method of the air conditioner in the following embodiments.

[0089] This invention also provides a control method for an air conditioner, applied to the aforementioned air conditioner.

[0090] Reference Figure 3 This application proposes an embodiment of a control method for an air conditioner. In this embodiment, the air conditioner includes a first indoor heat exchanger, a gas-liquid separator, and a second indoor heat exchanger. The gas-liquid separator has a gas-liquid inlet and a liquid outlet. The refrigerant outlet of the first indoor heat exchanger is connected to the gas-liquid inlet. The liquid outlet is connected to the refrigerant inlet of the second indoor heat exchanger via a first pipeline. The first pipeline is equipped with a first control valve. The control method for the air conditioner includes:

[0091] Step S10: When the air conditioner is in cooling operation, obtain the first temperature of the indoor environment;

[0092] When the air conditioner is in cooling mode, both the first indoor heat exchanger and the second indoor heat exchanger are in an evaporation state.

[0093] The first temperature is obtained by acquiring data from the first temperature detection module in real time. During the cooling operation of the air conditioner, the first temperature of the indoor environment can be acquired at set intervals (such as 5s, 10s, or 15s).

[0094] Step S20: Determine the operating parameters of the first control valve of the air conditioner based on the first temperature;

[0095] The operating parameters of the first control valve are those related to the regulation of the cooling capacity output of the air conditioner. Specifically, the operating parameters of the first control valve are used to regulate the amount of refrigerant flowing into the second indoor heat exchanger from the outlet of the gas-liquid separator. The operating parameters of the first control valve specifically include its opening and closing control parameters (such as opening or closing the control valve) and / or opening degree control parameters (such as target opening degree or opening degree adjustment parameters).

[0096] Different first temperatures correspond to different operating parameters. Specifically, different first temperatures correspond to different opening and closing control parameters of the first control valve. Different first temperatures also correspond to different opening degree control parameters of the first control valve. The correspondence between the first temperature and operating parameters can be preset or determined based on the operating conditions of the air conditioner for that year. Based on this correspondence, the operating parameters of the first control valve corresponding to the first temperature can be determined.

[0097] Step S30: Control the first control valve to operate with the operating parameters so that the cooling capacity output by the air conditioner matches the cooling capacity currently required by the indoor environment.

[0098] The current cooling capacity required by the indoor environment is specifically characterized by the indoor ambient temperature, and the current cooling capacity required by the indoor environment is positively correlated with the indoor ambient temperature.

[0099] It should be noted that when the air conditioner is equipped with the aforementioned third pipe and the third pipe is equipped with a second control valve, the second control valve is controlled to open during the execution of step S30.

[0100] In step S30, when the compressor is a fixed-frequency compressor, the process further includes controlling the fixed-frequency compressor to remain on when the first temperature is less than or equal to the set temperature. When the compressor is a variable-frequency compressor, during step S30, when the first temperature is less than or equal to the set temperature, the compressor can be controlled to operate at a pre-set fixed frequency or at a target frequency determined based on the current indoor temperature. This effectively avoids large fluctuations in indoor temperature caused by the compressor (especially a fixed-frequency compressor) shutting down after reaching the set temperature, thus improving user comfort.

[0101] This invention proposes a control method for an air conditioner. The method is based on an air conditioner with a refrigerant circulation loop comprising a first indoor heat exchanger, a gas-liquid separator, and a second indoor heat exchanger connected in sequence. The refrigerant flowing into the indoor heat exchanger first undergoes heat exchange in the first indoor heat exchanger. After heat exchange, the gas-liquid mixture of refrigerant is separated in the gas-liquid separator. The separated liquid refrigerant can then enter the second indoor heat exchanger for further heat exchange. Reducing the proportion of gaseous refrigerant entering the second indoor heat exchanger improves the heat exchange efficiency of the liquid refrigerant, facilitating the release of more cooling capacity from the refrigerant into the indoor air. When the air conditioner is in cooling mode, the operation of the first control valve is adjusted according to the indoor ambient temperature. Different operating states of the first control valve can result in different amounts of refrigerant flowing from the gas-liquid separator into the second indoor heat exchanger, thereby regulating the cooling capacity output by the air conditioner in the indoor heat exchanger. During this process, the cooling capacity output by the indoor heat exchanger is no longer fixed, but can be adjusted by the first control valve according to the indoor ambient temperature, thus ensuring that the output cooling capacity matches the indoor environmental demand. This ensures that the cooling capacity output by the air conditioner meets the indoor environmental demand during cooling operation, improving user comfort during the air conditioner's cooling process.

[0102] Furthermore, based on the above embodiments, another embodiment of the control method for the air conditioner of this application is proposed. In this embodiment, the gas-liquid separator is further provided with an outlet, the compressor of the air conditioner is connected to the refrigerant outlet of the second indoor heat exchanger through a second pipeline, and the second pipeline is connected to the outlet through a third pipeline, as described above. Figure 4 Step S20 includes:

[0103] Step S21: When the first temperature is greater than the set temperature of the air conditioner, determine that the operating parameters include the opening of the first control valve;

[0104] Step S22: When the first temperature is less than or equal to the set temperature, determine that the operating parameters include closing the first control valve.

[0105] The set temperature of an air conditioner is specifically the target temperature that the indoor environment needs to reach when the air conditioner is running in cooling mode.

[0106] When the first temperature is higher than the set temperature, it indicates that the indoor environment requires a large amount of cooling. At this time, the first control valve is opened, allowing the liquid refrigerant in the gas-liquid separator to flow into the second indoor heat exchanger for heat exchange. The first and second indoor heat exchangers evaporate simultaneously to release cooling capacity with a larger heat exchange area. There is no gaseous refrigerant flowing into the second indoor heat exchanger, which helps to improve the refrigerant evaporation efficiency. This increases the cooling capacity released by the indoor heat exchangers while maintaining a fixed compressor displacement and a fixed total heat exchange area. This helps to shorten the cooling time of the air conditioner, allowing the indoor environment to quickly reach the set temperature and meet the comfort needs of indoor users.

[0107] Furthermore, when the first temperature is less than or equal to the set temperature, it indicates that the indoor environment has reached the user's comfortable temperature and the required cooling capacity is relatively small. At this time, the first control valve is closed, and the refrigerant flowing into the room passes through the first indoor heat exchanger for heat exchange and is separated by the gas-liquid separator. It then no longer flows into the second indoor heat exchanger for heat exchange. The separated gaseous refrigerant flows back to the compressor through the third pipeline into the second pipeline. The indoor heat exchanger uses a smaller heat exchange area to exchange heat, which can prevent the compressor from stopping due to excessively low indoor temperature and avoid a significant rise in indoor temperature caused by compressor shutdown. This ensures that the compressor maintains stable operation while the indoor environment meets the user's comfort requirements.

[0108] Furthermore, after step S30, you can return to execute step S10.

[0109] In this embodiment, the first control valve can operate at a preset fixed opening degree when it is opened. In other embodiments, the target opening degree of the first control valve can also be determined based on the first temperature. The operating parameters of the first control valve include the target opening degree, which is positively correlated with the first temperature. Specifically, the temperature difference between the first temperature and the set temperature can be determined, and the target opening degree is positively correlated with the temperature difference value. Specifically, the target opening degree can be calculated from the first temperature or the temperature difference value; alternatively, it can be obtained by querying a mapping relationship using the first temperature or the temperature difference value. Further, when the first temperature is greater than the set temperature of the air conditioner, the target opening degree of the first control valve can be determined based on the first temperature, and the operating parameters determined include the first control valve opening at the target opening degree.

[0110] Furthermore, based on any of the above embodiments, another embodiment of the control method for the air conditioner of this application is proposed. In this embodiment, the third pipeline is provided with a second control valve, and the second control valve is controlled to open simultaneously with or after step S30 is executed. Specifically, refer to... Figure 5 When the first temperature is less than or equal to the set temperature, after step S30, the method further includes:

[0111] Step S40: Obtain the second temperature of the indoor environment;

[0112] The method for obtaining the second temperature is the same as that for the first temperature, and will not be repeated here.

[0113] Step S50: Determine the target opening degree of the second control valve based on the second temperature;

[0114] The target opening degree is specifically the target value that the second control valve needs to achieve during operation. Specifically, the target opening degree is the opening value of the second control valve used to ensure that the temperature difference between the indoor ambient temperature and the set temperature is less than the set value.

[0115] Different second temperatures correspond to different target opening degrees. The target opening degree is positively correlated with the second temperature. Specifically, the corresponding relationship between the second temperature and the target opening degree can be preset or obtained according to the actual operating conditions of the air conditioner (such as air conditioner operating parameters or the ambient temperature of the environment where the air conditioner is located, etc.). The corresponding relationship can be in the form of a mapping relationship (such as a mapping table, etc.), a calculation formula, etc. Based on this corresponding relationship, the target opening degree corresponding to the second temperature can be determined. In this embodiment, the target frequency of the compressor operation can be obtained, and the target corresponding relationship between the second temperature and the target opening degree can be obtained according to the target frequency. Different target frequencies correspond to different target corresponding relationships. If the target frequency is different, the target opening degree corresponding to the second temperature is different. Based on the target corresponding relationship, the target opening degree corresponding to the second temperature can be determined.

[0116] In an implementation manner of this embodiment, for the stability of the refrigerant circulation system operation, a mapping relationship between the temperature range corresponding to the indoor ambient temperature and the opening degree of the second control valve can be established in advance. Based on this mapping relationship, the target opening degree of the second control valve corresponding to the current second temperature can be determined. Specifically, step S50 includes: determining the first temperature range where the second temperature is located; determining the target opening degree according to the first temperature range; wherein, the target opening degree is positively correlated with the temperature within the first temperature range. Specifically, the indoor ambient temperature can be divided into at least two preset temperature ranges according to the set temperature in advance, and the indoor ambient temperature greater than or equal to the set temperature can be divided into at least two preset temperature ranges. Each preset temperature range is associated with a preset opening degree of the second control valve, and the cooling capacity output by the air conditioner corresponding to the preset opening degree associated with the preset temperature range matches the cooling capacity required by the indoor environment corresponding to the preset temperature range. Based on this, the preset temperature range where the second temperature is located in the at least two preset temperature ranges is determined as the first temperature range, and the preset opening degree associated with the first temperature range is used as the target opening degree of the second control valve. For example, the at least two temperature ranges can include the first range, the second range, and the third range. If the set temperature is 24°C, the three ranges are (24°C, 26°C], (26°C, 27°C], (27°C, +∞] in sequence, and the associated preset opening degrees are S1, S2, S3 in sequence, where S1 < S2 < S3. If the second temperature is in (24°C, 26°C], then S1 is the target opening degree; if the second temperature is in (26°C, 27°C], then S2 is the target opening degree; if the second temperature is in (27°C, +∞], then S3 is the target opening degree. Among them, when the second temperature is in the second range (indicating that the indoor ambient temperature is near the set temperature), if a shutdown instruction of the air conditioner is received, the air conditioner can be controlled to shut down; if no shutdown instruction is received, then S2 can be determined as the target opening degree of the second control valve. Through this implementation manner, it can be ensured that the indoor ambient temperature will not deviate too much from the set temperature and the compressor will not stop during the temperature recovery process of the air conditioner, effectively preventing the fluctuation of the indoor ambient temperature and improving the comfort of indoor users.

[0117] In another implementation of this embodiment, to improve the accuracy of the second control valve's regulation and further enhance indoor user comfort, step S50 may include: determining the temperature difference between the second temperature and the target temperature; determining the target opening degree based on the temperature difference value; wherein the target temperature is greater than the set temperature, and the difference between the target temperature and the set temperature is less than the set value, and the target opening degree is positively correlated with the temperature difference value. In this embodiment, the temperature difference value is the difference between the second temperature and the target temperature. In other embodiments, the temperature difference value may also be the difference between the target temperature and the second temperature, or the temperature difference value may also be the absolute value of the difference between the target temperature and the second temperature. This implementation ensures that the indoor ambient temperature can be maintained near the target temperature during the air conditioner's recirculation process, without deviating too much from the set temperature, while the compressor will not stop, effectively preventing indoor ambient temperature fluctuations and improving indoor user comfort.

[0118] Specifically, let's define the second temperature as T, the target temperature as T1, the temperature difference as T-T1, and take a set temperature of 24℃ and a target temperature of 26.5℃ as an example. The following table will illustrate this implementation method:

[0119] T-T1 Target opening -3 L1 -2 L2 -1 L3 0 L4 1 L5 2 L6 3 L7

[0120] Among them, L1 <L2<L3<L4<L5<L6<L7。

[0121] For example, when the second temperature is 25.5 degrees, the temperature difference is -1, and the target opening is L3; when the second temperature is 28.5 degrees, the temperature difference is 2, and the target opening is L6.

[0122] Alternatively, in other implementation methods, the temperature difference value can be substituted into a preset formula to calculate the target opening degree.

[0123] Step S60: Control the second control valve to open at the target opening degree so that the difference between the indoor ambient temperature and the set temperature is less than the set value.

[0124] The set value can be a pre-set fixed parameter, a parameter set by the user, or a parameter determined based on the human body detection information in the space currently being regulated by the air conditioner.

[0125] The second interval mentioned above can be determined based on the target temperature. For example, the difference between the average temperature or critical value of the second interval and the set temperature can be the set value.

[0126] Furthermore, after step S60, the process can return at set intervals to obtain the second temperature of the indoor environment.

[0127] In this embodiment, the above method enables the cooling output of the air conditioner during the recovery phase of cooling operation to accurately match the actual needs of the indoor environment, ensuring that the compressor does not stop and the cooling output can continue, preventing excessive fluctuations in indoor temperature and ensuring that indoor users do not feel obvious alternation between hot and cold, thus effectively improving user comfort during the air conditioning cooling operation.

[0128] Furthermore, in this embodiment, before the step of obtaining the second temperature of the indoor environment, the method further includes: when the first temperature is less than or equal to the set temperature, controlling the second control valve to open at a preset minimum opening degree, wherein the target opening degree is greater than or equal to the preset minimum opening degree. The minimum allowed value of the target opening degree can be the preset minimum opening degree, or it can be greater than the preset minimum opening degree. The second control valve is open at the preset minimum opening degree and the first control valve is closed, thereby ensuring that the air conditioner outputs the lowest possible cooling capacity, avoiding excessively low indoor ambient temperatures, ensuring that the indoor ambient temperature is near the set temperature, and ensuring user comfort.

[0129] Furthermore, in this embodiment, before step S50, the method may include: obtaining a third temperature of the outdoor environment; obtaining a first correspondence between the second temperature and the target opening degree based on the third temperature; the step of determining the target opening degree of the second control valve based on the second temperature includes: determining the target opening degree corresponding to the second temperature based on the first correspondence.

[0130] The third temperature is obtained by acquiring data detected in real time by the second temperature detection module.

[0131] The first correspondence here can take the form of a calculation formula, a mapping relationship (such as a mapping table), etc., with different third temperatures corresponding to different first correspondences. Specifically, the target opening degree corresponding to the second temperature is positively correlated with the third temperature; the higher the third temperature, the higher the target opening degree corresponding to the second temperature in the first correspondence. The calculation result or matching result obtained by substituting the second temperature into the first correspondence can be used as the target opening degree. For example, the correspondence between the temperature range of the indoor ambient temperature and the target opening degree can be obtained based on the third temperature, or the correspondence between the temperature difference and the target opening degree can also be obtained based on the third temperature.

[0132] Specifically, in this embodiment, the outdoor ambient temperature can be pre-divided into at least two outdoor temperature ranges. Each outdoor temperature range corresponds to a preset correspondence between an indoor temperature and the opening degree of the second control valve. The outdoor temperature range where the third temperature is located is determined as the target range, and the preset correspondence associated with the target area is used as the first correspondence.

[0133] In this embodiment, the correspondence between the second temperature and the target opening degree is adapted to the determination of the outdoor ambient temperature, which helps to further improve the accuracy of the opening degree regulation of the second control valve, so as to ensure that the cooling capacity output by the air conditioner under the current operating conditions is accurately matched with the cooling capacity required indoors, and to ensure that the cooling capacity output by the air conditioner when the second control valve is running at the target opening degree will not cause a large change in the indoor ambient temperature, so as to further improve the comfort of indoor users.

[0134] Furthermore, based on the above embodiments, another embodiment of the control method for the air conditioner of this application is proposed. In this embodiment, the compressor is a variable frequency compressor, referring to... Figure 6 When the first temperature is less than or equal to the set temperature, the process of step S30 further includes:

[0135] Step S70: Obtain the fourth temperature of the indoor environment;

[0136] The acquisition of the fourth temperature is analogous to the first temperature described above, and will not be elaborated upon here.

[0137] Step S80: Determine the target frequency of the variable frequency compressor based on the fourth temperature;

[0138] The target frequency is specifically the target value or target frequency range that the compressor needs to achieve during operation. The target frequency is specifically the frequency value or frequency range of the compressor used to ensure that the temperature difference between the indoor ambient temperature and the set temperature is less than the set value.

[0139] Different fourth temperatures correspond to different target frequencies. The target frequency is positively correlated with the fourth temperature. Specifically, the correspondence between the fourth temperature and the target frequency can be preset or obtained based on the actual operating conditions of the air conditioner (such as air conditioner operating parameters or the ambient temperature of the environment where the air conditioner is located). This correspondence can take the form of a mapping relationship (such as a mapping table), a calculation formula, etc. Based on this correspondence, the target frequency corresponding to the fourth temperature can be determined. In this embodiment, the target frequency of the compressor operation can be obtained, and the target correspondence between the fourth temperature and the target frequency can be obtained based on the target frequency. Different target frequencies correspond to different target correspondences; different target frequencies result in different target frequencies corresponding to the fourth temperature. Based on the target correspondence, the target frequency corresponding to the fourth temperature can be determined.

[0140] In an implementation of this embodiment, for the stability of the refrigerant circulation system operation, a mapping relationship between the temperature range corresponding to the indoor environmental temperature and the frequency of the compressor can be established in advance, and the target frequency of the compressor corresponding to the current fourth temperature can be determined based on this mapping relationship. Specifically, step S80 includes: determining the second temperature range where the fourth temperature is located; determining the target frequency according to the second temperature range; wherein, the target frequency is positively correlated with the temperature within the second temperature range. Specifically, the indoor environmental temperature can be divided into at least two preset temperature ranges according to the set temperature in advance, and the indoor environmental temperature greater than or equal to the set temperature can be divided into at least two preset temperature ranges. Each preset temperature range is correspondingly associated with a preset frequency of the compressor, and the cooling capacity output by the air conditioner corresponding to the preset frequency associated with the preset temperature range matches the cooling capacity required for the indoor environment corresponding to the preset temperature range. Based on this, the preset temperature range where the fourth temperature is located among the at least two preset temperature ranges is determined as the second temperature range, and the preset frequency associated with the second temperature range is used as the target frequency of the compressor. For example, the at least two temperature ranges can include the first range, the second range, and the third range. If the set temperature is 24°C, the three ranges are (24°C, 26°C], (26°C, 27°C], (27°C, +∞] in sequence, and the correspondingly associated preset frequencies are F1, F2, F3 in sequence, where F1 < F2 < F3. If the fourth temperature is in (24°C, 26°C], then F1 is the target frequency; if the fourth temperature is in (26°C, 27°C], then F2 is the target frequency; if the fourth temperature is in (27°C, +∞], then F3 is the target frequency. When the fourth temperature is in the second range (indicating that the indoor environmental temperature is near the set temperature), if a shutdown instruction for the air conditioner is received, the air conditioner can be controlled to shut down; if no shutdown instruction is received, then F2 can be determined as the target frequency of the compressor. Through this implementation method, it can be ensured that the indoor environmental temperature does not deviate too much from the set temperature and the compressor does not stop during the temperature recovery process of the air conditioner, effectively preventing the fluctuation of the indoor environmental temperature and improving the comfort of indoor users.

[0141] In another implementation of this embodiment, to improve the accuracy of compressor control and further enhance indoor user comfort, step S50 may include: determining the temperature difference between the fourth temperature and the target temperature; determining the target frequency based on the temperature difference; wherein the target temperature is greater than the set temperature, and the difference between the target temperature and the set temperature is less than the set value, and the target frequency is positively correlated with the temperature difference. In this embodiment, the temperature difference is the difference between the fourth temperature and the target temperature. In other embodiments, the temperature difference may also be the difference between the target temperature and the fourth temperature, or the temperature difference may also be the absolute value of the difference between the target temperature and the fourth temperature. This implementation ensures that the indoor ambient temperature remains near the target temperature during the air conditioner's recirculation process, without deviating too much from the set temperature, while the compressor does not stop, effectively preventing indoor ambient temperature fluctuations and improving indoor user comfort.

[0142] Specifically, let's define the fourth temperature as T, the target temperature as T1, the temperature difference as T-T1, and take a set temperature of 24℃ and a target temperature of 26.5℃ as an example. The following table will illustrate this implementation method:

[0143] T-T1 Target frequency -3 F1 -2 F2 -1 F3 0 F4 1 F5 2 F6 3 F7

[0144] Among them, F1 <F2<F3<F4<F5<F6<F7。

[0145] For example, when the fourth temperature is 25.5 degrees, the temperature difference is -1, and the target frequency is F3; when the fourth temperature is 28.5 degrees, the temperature difference is 2, and the target frequency is F6.

[0146] Alternatively, in other implementation methods, the temperature difference value can be substituted into a preset formula to calculate the target frequency.

[0147] Step S90: Control the variable frequency compressor to operate at the target frequency so that the difference between the indoor ambient temperature and the set temperature is less than the set value.

[0148] The setpoint can be a pre-set fixed parameter, a parameter set by the user, or a parameter determined based on the human body detection information in the currently regulated space by the air conditioner. The setpoint here refers to the same concept as the setpoint mentioned above.

[0149] The second interval mentioned above can be determined based on the target temperature. For example, the difference between the average temperature or critical value of the second interval and the set temperature can be the set value.

[0150] Furthermore, after step S80, the process can return to the step of obtaining the fourth temperature of the indoor environment at set intervals.

[0151] In this embodiment, the above-described method enables the compressor and the second control valve to work together to ensure that the cooling output of the air conditioner during the temperature recovery phase of the air conditioner's cooling operation is precisely matched with the actual needs of the indoor environment. This ensures that the compressor does not stop and the cooling output can continue, preventing excessive fluctuations in the indoor temperature and ensuring that indoor users do not feel obvious alternations between hot and cold. This effectively improves user comfort during the air conditioner's cooling operation.

[0152] It should be noted that when step S30 includes steps S40, S50 and S60, steps S40 and S70 can be combined into the same step. The order of execution of steps S50 and S80 is not specifically limited. Steps S60 and S90 can be executed simultaneously or sequentially.

[0153] Furthermore, in this embodiment, after step S40 (i.e., step S70), step S80 can be executed first. After obtaining the target frequency, the target opening degree of the second control valve is determined based on the target frequency. Alternatively, after obtaining the target frequency, the correspondence between the second temperature and the target opening degree can be obtained based on the target frequency, and the target opening degree corresponding to the second temperature can be determined based on this correspondence. Based on this, the coordination between the operation of the compressor and the operation of the second control valve can be effectively improved, so that the operation of the compressor and the second control valve can accurately match the actual cooling capacity output by the air conditioner with the current cooling capacity required by the indoor environment, thereby further improving the comfort of indoor users.

[0154] Furthermore, in this embodiment, before the step of obtaining the fourth temperature of the indoor environment, the method further includes: when the first temperature is less than or equal to the set temperature, controlling the compressor to operate at a preset minimum frequency, wherein the preset minimum frequency is less than or equal to the target frequency. The minimum allowable value of the target frequency can be the preset minimum frequency, or it can be greater than the preset minimum frequency. The compressor starts at the preset minimum frequency and the first control valve is closed, thereby ensuring that the air conditioner outputs the lowest possible cooling capacity, avoiding excessively low indoor temperatures, ensuring that the indoor temperature is near the set temperature, and ensuring user comfort.

[0155] Furthermore, in this embodiment, before step S80, the method may include: obtaining a fifth temperature of the outdoor environment; obtaining a second correspondence between the fourth temperature and the target frequency based on the fifth temperature; the step of determining the target frequency of the variable frequency compressor based on the fourth temperature includes: determining the target frequency corresponding to the fourth temperature based on the second correspondence.

[0156] The fifth temperature is obtained by acquiring data detected in real time by the second temperature detection module. Specifically, if the acquisition of the third outdoor ambient temperature is included before step S80, the acquisition of the third outdoor ambient temperature and the acquisition of the fifth outdoor ambient temperature here can be combined into one step. The order in which the first and second correspondences are acquired is not specifically limited.

[0157] The second correspondence here can take the form of a calculation formula, a mapping relationship (such as a mapping table), etc., with different fifth temperatures corresponding to different second correspondences. Specifically, the target frequency corresponding to the fourth temperature is positively correlated with the fifth temperature; the higher the fifth temperature, the higher the target frequency corresponding to the fourth temperature in the second correspondence. The calculation result or matching result obtained by substituting the fourth temperature into the second correspondence can be used as the target frequency. For example, the correspondence between the temperature range of the aforementioned indoor ambient temperature and the target frequency can be obtained based on the fifth temperature, or the correspondence between the aforementioned temperature difference and the target frequency can also be obtained based on the fifth temperature.

[0158] Specifically, in this embodiment, the outdoor ambient temperature can be pre-divided into at least two outdoor temperature ranges. Each outdoor temperature range corresponds to a preset correspondence between an indoor temperature and the compressor frequency. The outdoor temperature range where the fifth temperature is located is determined as the target range, and the preset correspondence associated with the target range is used as the second correspondence.

[0159] In this embodiment, the correspondence between the fourth temperature and the target frequency is adapted to the determination of the outdoor ambient temperature, which helps to further improve the accuracy of compressor frequency control, so as to ensure that the cooling capacity output by the air conditioner under the current operating conditions is accurately matched with the cooling capacity required indoors, and to ensure that the cooling capacity output by the air conditioner when the compressor is running at the target frequency will not cause a large change in the indoor ambient temperature, so as to further improve the comfort of indoor users.

[0160] Furthermore, this invention also proposes a computer-readable storage medium storing a control program for an air conditioner. When the control program is executed by a processor, it implements the relevant steps of any of the above-described air conditioner control methods.

[0161] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0162] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0163] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0164] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A control method for an air conditioner, characterized in that, The air conditioner includes a first indoor heat exchanger, a gas-liquid separator, and a second indoor heat exchanger. The gas-liquid separator has a gas-liquid inlet, a liquid outlet, and a gas outlet. The refrigerant outlet of the first indoor heat exchanger is connected to the gas-liquid inlet. The liquid outlet is connected to the refrigerant inlet of the second indoor heat exchanger via a first pipeline, which is equipped with a first control valve. The air conditioner's compressor is connected to the refrigerant outlet of the second indoor heat exchanger via a second pipeline. The second pipeline is connected to the gas outlet via a third pipeline, which is equipped with a second control valve. The control method of the air conditioner includes the following steps: When the air conditioner is in cooling mode, the first temperature of the indoor environment is obtained; The operating parameters of the first control valve of the air conditioner are determined based on the first temperature. When the first temperature is greater than the set temperature of the air conditioner, the operating parameters include the first control valve being open; when the first temperature is less than or equal to the set temperature, the operating parameters include the first control valve being closed. The first control valve is controlled to operate with the operating parameters so that the cooling capacity output by the air conditioner matches the cooling capacity currently required by the indoor environment. When the first temperature is less than or equal to the set temperature, the step of controlling the first control valve to operate with the operating parameters is performed simultaneously or after the following steps: Obtain a second temperature of the indoor environment; The target opening degree of the second control valve is determined based on the second temperature. The second control valve is controlled to open at the target opening degree so that the difference between the indoor ambient temperature and the set temperature is less than the set value.

2. The control method for an air conditioner as described in claim 1, characterized in that, The step of determining the target opening degree of the second control valve based on the second temperature includes: Determine the first temperature range in which the second temperature falls; The target opening degree is determined based on the first temperature range; The target opening degree is positively correlated with the temperature within the first temperature range.

3. The control method for an air conditioner as described in claim 1, characterized in that, The step of determining the target opening degree of the second control valve based on the second temperature includes: Determine the temperature difference between the second temperature and the target temperature; The target opening degree is determined based on the temperature difference value; Wherein, the target temperature is greater than the set temperature, and the difference between the target temperature and the set temperature is less than the set value, and the target opening degree is positively correlated with the temperature difference value.

4. The control method for an air conditioner as described in claim 1, characterized in that, Before the step of determining the target opening degree of the second control valve based on the second temperature, the method further includes: Obtain the third temperature of the outdoor environment; A first correspondence between the second temperature and the target opening degree is obtained based on the third temperature; The step of determining the target opening degree of the second control valve based on the second temperature includes: The target opening degree corresponding to the second temperature is determined based on the first correspondence.

5. The control method for an air conditioner as described in claim 1, characterized in that, Before the step of obtaining the second temperature of the indoor environment, the method further includes: When the first temperature is less than or equal to the set temperature, the second control valve is controlled to open at a preset minimum opening degree, wherein the target opening degree is greater than or equal to the preset minimum opening degree.

6. The control method for an air conditioner as described in any one of claims 1 to 5, characterized in that, The compressor is a fixed-frequency compressor, and the process of controlling the first control valve to operate according to the operating parameters further includes: When the first temperature is less than or equal to the set temperature, the fixed-frequency compressor is controlled to remain on.

7. The control method for an air conditioner as described in any one of claims 1 to 5, characterized in that, The compressor is a variable frequency compressor. During the process of controlling the first control valve to operate according to the operating parameters when the first temperature is less than or equal to the set temperature, the procedure further includes: Obtain the fourth temperature of the indoor environment; The target frequency of the variable frequency compressor is determined based on the fourth temperature. The variable frequency compressor is controlled to operate at the target frequency so that the difference between the indoor ambient temperature and the set temperature is less than the set value.

8. The control method for an air conditioner as described in claim 7, characterized in that, The step of determining the target frequency of the variable frequency compressor based on the fourth temperature includes: Determine the second temperature range in which the fourth temperature is located; The target frequency is determined based on the second temperature range; The target frequency is positively correlated with the temperature within the second temperature range.

9. The control method for an air conditioner as described in claim 8, characterized in that, The step of determining the target frequency of the variable frequency compressor based on the fourth temperature includes: Determine the temperature difference between the fourth temperature and the target temperature; The target frequency is determined based on the temperature difference value; Wherein, the target temperature is greater than the set temperature, and the difference between the target temperature and the set temperature is less than the set value, and the target frequency is positively correlated with the temperature difference value.

10. The control method for an air conditioner as described in claim 7, characterized in that, Before the step of determining the target frequency of the variable frequency compressor based on the fourth temperature, the method further includes: Obtain the fifth temperature of the outdoor environment; A second correspondence between the fourth temperature and the target frequency is obtained based on the fifth temperature; The step of determining the target frequency of the variable frequency compressor based on the fourth temperature includes: The target frequency corresponding to the fourth temperature is determined based on the second correspondence.

11. The control method for an air conditioner as described in claim 7, characterized in that, Before the step of obtaining the fourth temperature of the indoor environment, the method further includes: When the first temperature is less than or equal to the set temperature, the compressor is controlled to operate at a preset minimum frequency, which is less than or equal to the target frequency.

12. An air conditioner, characterized in that, The air conditioner includes: First indoor heat exchanger; Second indoor heat exchanger; A gas-liquid separator is provided with a gas-liquid inlet, a liquid outlet, and a gas outlet. The refrigerant outlet of the first indoor heat exchanger is connected to the gas-liquid inlet. The liquid outlet is connected to the refrigerant inlet of the second indoor heat exchanger through a first pipeline. The first pipeline is provided with a first control valve. The compressor of the air conditioner is connected to the refrigerant outlet of the second indoor heat exchanger through a second pipeline. The second pipeline is connected to the gas outlet through a third pipeline. The third pipeline is provided with a second control valve. A control device, wherein a first control valve is connected to the control device, a second control valve is connected to the control device, the control device comprising: a memory, a processor, and an air conditioner control program stored in the memory and executable on the processor, wherein when the air conditioner control program is executed by the processor, it implements the steps of the air conditioner control method as described in any one of claims 1 to 11.

13. The air conditioner as described in claim 12, characterized in that, Both the first control valve and the second control valve are electronic expansion valves; or, the first control valve is a check valve and the second control valve is an electronic expansion valve. And / or, the heat exchange area of ​​the first indoor heat exchanger is smaller than the heat exchange area of ​​the second indoor heat exchanger.

14. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a control program for an air conditioner, which, when executed by a processor, implements the steps of the control method for an air conditioner as described in any one of claims 1 to 11.

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