Air conditioner, control method thereof, storage medium, and program product

Abstract

This application discloses an air conditioner and its control method, storage medium, and program product. The air conditioner includes: a compressor, a four-way valve, an outdoor heat exchanger, an indoor heat exchanger, a throttling device, a bypass branch, and a phase separator. The outdoor heat exchanger includes a first heat exchange module and a second heat exchange module. The compressor's exhaust port is connected to the first port of the four-way valve, the second heat exchange module is connected to the second port of the four-way valve, the compressor's suction port is connected to the third port of the four-way valve, and the indoor heat exchanger is connected to the fourth port of the four-way valve. The indoor heat exchanger, the throttling device, the first heat exchange module, the phase separator, and the second heat exchange module are connected sequentially. The outlet of the phase separator is sequentially connected to the compressor's suction port. One end of the bypass branch is connected to the phase separator, and the bypass branch is connected in parallel with the flow path of the first heat exchange module and / or the bypass branch is connected in parallel with the flow path of the second heat exchange module. By setting up a phase separator, the heat exchange capacity of the outdoor heat exchanger is improved, thereby increasing the operating efficiency of the air conditioner.

Description

Technical Field

[0001] This application relates to the field of air conditioner control technology, and in particular to air conditioners and their control methods, storage media and program products. Background Technology

[0002] In heating mode, the refrigerant releases heat in the condenser. Dry refrigerant is more easily converted to a liquid state, thus releasing heat more efficiently and improving heating efficiency. In cooling mode, the refrigerant converts from a liquid to a gaseous state in the evaporator to absorb indoor heat. If the refrigerant is too dry, meaning it has a low liquid content, its evaporation efficiency will decrease, affecting the air conditioner's ability to absorb indoor heat and reducing cooling efficiency.

[0003] Typically, in heating mode, liquid refrigerant is added to the evaporator to control the refrigerant dryness within the range with the highest heat transfer coefficient, thereby improving heating capacity. In cooling mode, a gas injection device is installed in the condenser to increase refrigerant dryness and improve the refrigerant-side heat transfer coefficient, thus improving cooling capacity. However, the above solutions only apply to either cooling or heating modes and cannot improve the capacity for both modes. They also cannot adjust the refrigerant dryness in different operating modes, resulting in low operating efficiency of the air conditioner. Summary of the Invention

[0004] The main objective of this application is to provide an air conditioner and its control method, storage medium and program product, which aims to solve the technical problem of low operating efficiency of the air conditioner due to the inability to adjust the refrigerant dryness under different operating modes.

[0005] To achieve the above objectives, this application proposes an air conditioner, the air conditioner comprising:

[0006] Compressor, four-way valve, outdoor heat exchanger, indoor heat exchanger, throttling device, bypass branch and phase separator;

[0007] The outdoor heat exchanger includes a first heat exchange module and a second heat exchange module;

[0008] The compressor's exhaust port is connected to the first port of the four-way valve, the second heat exchange module is connected to the second port of the four-way valve, the compressor's intake port is connected to the third port of the four-way valve, and the indoor heat exchanger is connected to the fourth port of the four-way valve.

[0009] The indoor heat exchanger, the throttling device, the first heat exchange module, the phase separator, and the second heat exchange module are connected in sequence; the outlet of the phase separator is connected in sequence to the suction port of the compressor; one end of the bypass branch is connected to the phase separator, and the bypass branch is connected in parallel with the flow path of the first heat exchange module and / or the bypass branch is connected in parallel with the flow path of the second heat exchange module.

[0010] In one embodiment, the phase separator includes a first interface, a second interface, and a third interface. One end of the first heat exchange module is connected to the first interface, and one end of the second heat exchange module is connected to the third interface. The bypass branch includes a first branch, one end of which is connected between the throttling device and the indoor heat exchanger or between the throttling device and the first heat exchange module. The other end of the first branch is connected to the second interface, and a first throttling component is provided in the first branch.

[0011] In one embodiment, the phase separator includes a first interface, a third interface, and a fourth interface. One end of the first heat exchange module is connected to the first interface, and one end of the second heat exchange module is connected to the third interface. The bypass branch includes a second branch, one end of which is connected between the second heat exchange module and the second port, and the other end of which is connected to the fourth interface. A second throttling component is provided in the second branch.

[0012] To achieve the above objectives, this application proposes a control method for an air conditioner, the method comprising:

[0013] According to the operating mode of the air conditioner, obtain the temperature parameters of the air conditioner corresponding to the operating mode;

[0014] The second throttling component is controlled to operate according to the temperature parameters.

[0015] In one embodiment, when the air conditioner is operating in heating mode, the step of obtaining the temperature parameter of the air conditioner corresponding to the operating mode includes:

[0016] Obtain the pipe temperature of the second branch and the low-pressure saturation temperature of the compressor;

[0017] The step of controlling the operation of the second throttling component according to the temperature parameter includes:

[0018] The operation of the second throttling component is controlled based on the pipe temperature and the low-pressure saturation temperature.

[0019] In one embodiment, the step of controlling the operation of the second throttling component based on the pipe temperature and the low-pressure saturation temperature includes:

[0020] Determine the difference between the pipe temperature and the low-pressure saturation temperature;

[0021] When the difference is greater than or equal to a preset first temperature threshold, the second throttling component is controlled to open wider;

[0022] When the difference is less than a preset first temperature threshold, the second throttling component is controlled to close.

[0023] In one embodiment, the second throttling component includes an electronic expansion valve, and the step of controlling the opening of the second throttling component includes:

[0024] The electronic expansion valve is opened according to the preset first step number;

[0025] The step of controlling the second throttling component to close includes:

[0026] The electronic expansion valve is controlled to close slightly according to the preset second step.

[0027] In one embodiment, when the air conditioner is operating in cooling mode, the step of obtaining the temperature parameter of the air conditioner corresponding to the operating mode includes:

[0028] Obtain the pipe temperature of the second branch and the high-pressure saturation temperature of the compressor;

[0029] The step of controlling the operation of the second throttling component according to the temperature parameter includes:

[0030] The operation of the second throttling component is controlled based on the pipe temperature and the high-pressure saturation temperature.

[0031] In one embodiment, the step of controlling the operation of the second throttling component based on the pipe temperature and the high-pressure saturation temperature includes:

[0032] Determine the temperature difference between the pipe temperature and the high-pressure saturation temperature;

[0033] When the temperature difference is greater than a preset second temperature threshold, the second throttling component is controlled to close.

[0034] When the temperature difference is less than a preset third temperature threshold, the second throttling component is controlled to open wider.

[0035] In one embodiment, the second throttling component includes an electronic expansion valve, and the step of controlling the second throttling component to close includes:

[0036] The electronic expansion valve is controlled to close slightly according to the preset third step.

[0037] The step of controlling the opening of the second throttling component includes:

[0038] The electronic expansion valve is opened according to the preset fourth step.

[0039] In one embodiment, the step of controlling the operation of the second throttling component based on the pipe temperature and the high-pressure saturation temperature includes:

[0040] When the air conditioner compressor is at the first operating frequency, the step of controlling the operation of the second throttling component according to the pipe temperature and the high-pressure saturation temperature is executed.

[0041] When the air conditioner's compressor is at the second operating frequency, the throttling device is controlled to close, and the first operating frequency is greater than the second operating frequency.

[0042] In addition, to achieve the above objectives, this application also proposes an air conditioner, the air conditioner including a control device, the control device including: a memory, a processor and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the control method for the air conditioner as described above.

[0043] In addition, to achieve the above objectives, this application also proposes a storage medium, which is a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of the air conditioner control method described above.

[0044] In addition, to achieve the above objectives, this application also provides a computer program product, which includes a computer program that, when executed by a processor, implements the steps of the air conditioner control method described above.

[0045] One or more technical solutions proposed in this application have at least the following technical effects:

[0046] By installing a phase separator to increase the refrigerant dryness in the outdoor heat exchanger, the refrigerant temperature in the outdoor heat exchanger is kept within a suitable temperature range, thereby improving the heat exchange capacity of the outdoor unit and thus increasing the working efficiency of the air conditioner. Attached Figure Description

[0047] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0048] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a schematic diagram of the structure of the air conditioner in this application;

[0050] Figure 2 This is a schematic diagram of the structure of the air conditioner in this application;

[0051] Figure 3 This is a schematic diagram of the refrigerant flow direction of the air conditioner in heating mode according to this application;

[0052] Figure 4 This is a schematic diagram of the refrigerant flow direction of the air conditioner in this application during cooling.

[0053] Figure 5 This is a flowchart illustrating the control method of Embodiment 1 of this application.

[0054] Figure 6 This is a flowchart illustrating Embodiment 2 of the control method for the air conditioner of this application;

[0055] Figure 7 This is a flowchart illustrating Embodiment 3 of the control method for the air conditioner of this application;

[0056] Figure 8 This is a flowchart illustrating Embodiment 4 of the control method for the air conditioner of this application;

[0057] Figure 9 This is a flowchart illustrating Embodiment 5 of the control method for the air conditioner of this application.

[0058] Figure 10 A simplified flowchart is provided for Embodiment 5 of the control method for the air conditioner of this application;

[0059] Figure 11 This is a schematic diagram of the hardware operating environment involved in the control method of the air conditioner in this application embodiment.

[0060] Explanation of icon numbers:

[0061] 101. Second throttling component; 102. Outdoor unit electronic expansion valve; 103. Temperature sensor; 104. Temperature sensor; 105. Indoor electronic expansion valve; 106. First pressure sensor; 107. Second pressure sensor; 108. First throttling component; 110. Phase separator; 120. First heat exchange module; 130. Second heat exchange module; 200. Indoor heat exchanger; 300. Gas-liquid separator; 400. Compressor; 500. Four-way valve.

[0062] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0063] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0064] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0065] The main solution of this application embodiment is as follows: An air conditioner is proposed, comprising a compressor, a four-way valve, an outdoor heat exchanger, an indoor heat exchanger, a throttling device, a bypass branch, and a phase separator; the outdoor heat exchanger includes a first heat exchange module and a second heat exchange module; the compressor's exhaust port is connected to the first port of the four-way valve, the second heat exchange module is connected to the second port of the four-way valve, the compressor's suction port is connected to the third port of the four-way valve, and the indoor heat exchanger is connected to the fourth port of the four-way valve; the indoor heat exchanger, the throttling device, the first heat exchange module, the phase separator, and the second heat exchange module are connected sequentially; the phase separator's outlet is sequentially connected to the compressor's suction port; one end of the bypass branch is connected to the phase separator, and the bypass branch is connected in parallel with the flow path of the first heat exchange module and / or the bypass branch is connected in parallel with the flow path of the second heat exchange module.

[0066] In this embodiment, for ease of description, the following description will focus on the control device of the air conditioner.

[0067] Current technology, in heating mode, improves heating capacity by adding liquid refrigerant to the evaporator to control the refrigerant dryness within the range with the highest heat transfer coefficient. In cooling mode, a gas injection device is installed in the condenser to increase refrigerant dryness and improve the refrigerant-side heat transfer coefficient. However, these solutions only apply to either cooling or heating modes and cannot improve the capacity for both modes. They also cannot adjust the refrigerant dryness in different operating modes, resulting in low operating efficiency of the air conditioner.

[0068] This application provides a solution that improves the refrigerant dryness in the outdoor heat exchanger by setting a phase separator, so that the refrigerant temperature in the outdoor heat exchanger is within a suitable temperature range, thereby improving the heat exchange capacity of the outdoor unit and thus improving the working efficiency of the air conditioner.

[0069] Reference Figures 1 to 4 The air conditioner includes: a compressor 400, a four-way valve 500, an outdoor heat exchanger, an indoor heat exchanger 200, a throttling device, a bypass branch, and a phase separator 110; the outdoor heat exchanger includes a first heat exchange module 120 and a second heat exchange module 130; the discharge port of the compressor 400 is connected to the first port b1 of the four-way valve 500, the second heat exchange module 130 is connected to the second port b2 of the four-way valve 500, and the suction port of the compressor 400 is connected to the third port b3 of the four-way valve 500. The indoor heat exchanger 200 is connected to the fourth port b4 of the four-way valve 500; the indoor heat exchanger 200, the throttling device, the first heat exchange module 120, the phase separator 110 and the second heat exchange module 130 are connected in sequence; the outlet of the phase separator 110 is connected in sequence to the suction port of the compressor 400; one end of the bypass branch is connected to the phase separator 110, and the bypass branch is connected in parallel with the flow path of the first heat exchange module 120 and / or the bypass branch is connected in parallel with the flow path of the second heat exchange module 130.

[0070] Optionally, the throttling device includes an indoor electronic expansion valve 105 and / or an outdoor electronic expansion valve 102. An outdoor electronic expansion valve 102 is provided at the interface of the first heat exchange module 120, and an indoor electronic expansion valve 105 is provided at the interface of the indoor heat exchanger 200.

[0071] As an optional embodiment, the phase separator 110 includes a first interface a1, a second interface a2, and a third interface a3. One end of the first heat exchange module 120 is connected to the first interface a1, and one end of the second heat exchange module 130 is connected to the third interface a3. The bypass branch includes a first branch, one end of which is connected between the throttling device and the indoor heat exchanger 200 or between the throttling device and the first heat exchange module 120. The other end of the first branch is connected to the second interface a2. A first throttling component 108 is provided in the first branch.

[0072] Optionally, the first throttling component 108 is a capillary tube or an electronic expansion valve, for example, in Figure 2 The first throttling component 108 is a capillary tube. A pipe port, namely the second interface a2, is provided at the bottom of the phase separator 110. This pipe port is connected in series with the capillary tube and then connected to the pipeline between the outdoor unit electronic expansion valve 102 and the indoor electronic expansion valve 105.

[0073] As an optional embodiment, the phase separator 110 includes a first interface a1, a third interface a3, and a fourth interface a4. One end of the first heat exchange module 120 is connected to the first interface a1, one end of the second heat exchange module 130 is connected to the third interface a3, and the bypass branch includes a second branch. One end of the second branch is connected between the second heat exchange module 130 and the second port b2, and the other end of the second branch is connected to the fourth interface a4. A second throttling component 101 is provided in the second branch.

[0074] Optionally, the second throttling component 101 includes an electronic expansion valve or a solenoid valve, for example, in Figure 2 In the middle, the second throttling component 101 is an electronic expansion valve.

[0075] Optionally, a temperature sensor 103 is provided between the second throttling component 101 and the phase separator 110. The temperature sensor can be a phase separation gas outlet temperature sensing bulb.

[0076] Optionally, a temperature sensor 104 is provided between the first interface a1 of the phase separator 110 and the first heat exchange module 120.

[0077] The compressor 400 has a gas-liquid separator 300 at its air inlet. A first pressure sensor 106 is provided between the gas-liquid separator 300 and the compressor 400; exemplarily, the first pressure sensor 106 is a low-pressure sensor. A second pressure sensor 107 is provided between the compressor 400 and the four-way valve 500; exemplarily, the second pressure sensor 107 is a high-pressure sensor.

[0078] Optionally, such as Figure 3 As shown, Figure 3 This indicates the direction of refrigerant flow in heating mode, where the structure of the air conditioner is related to... Figure 2 The process is the same. When the air conditioner is in heating mode, the compressor 400 discharges gas through the first port of the four-way valve 500 into the indoor heat exchanger 200. At this time, the high-temperature, high-pressure refrigerant condenses and cools in the indoor heat exchanger 200. The refrigerant after heat exchange is in liquid state. This liquid refrigerant enters the outdoor heat exchanger. One branch enters the first heat exchange module 120 through the outdoor unit's electronic expansion valve 102 for evaporative heat exchange, resulting in a two-phase refrigerant. This liquid refrigerant then enters the phase separator 110 through the first interface a1. The other branch of liquid refrigerant enters the phase separator 110 through the first branch containing the first throttling component 108, and then through the second interface a2. Using this scheme, firstly, the refrigerant flow rate entering the first heat exchange module 120 can be reduced, increasing the flow length of the high-dryness refrigerant in the first heat exchange module 120. The heat transfer coefficient of the refrigerant first increases and then decreases with increasing dryness. Secondly, refrigerant can be added to the second heat exchange module 130, increasing the refrigerant flow rate in the second heat exchange module 130.

[0079] Phase separator 110 performs gas-liquid separation on the refrigerant entering through the first heat exchange module 120 and the refrigerant entering through the first branch. The gaseous refrigerant in phase separator 110 flows out through the top gas pipe (fourth port a4) and enters the second port of the four-way valve 500 through the second branch. The liquid refrigerant in phase separator 110 flows out through the bottom liquid pipe (third port a3) and enters the second heat exchange module 130 for evaporation and heat absorption, becoming gaseous refrigerant, which flows to the four-way valve 500. The refrigerant entering the four-way valve 500 returns to the gas-liquid separator 300 after passing through the four-way valve 500, and finally returns to the suction port of the compressor 400, completing the heating cycle. The second throttling component 101 is used to regulate the gas output, preventing the valve from opening too wide, which would cause liquid to be carried in the gas and affect the heating capacity, and preventing the valve from opening too narrowly, which would affect the phase separation and extraction effect.

[0080] Optionally, the outdoor unit's electronic expansion valve 102 can be replaced by a solenoid valve, etc., which is used to control the amount of refrigerant entering the first heat exchange module 120 in heating mode.

[0081] Optionally, such as Figure 4 As shown, Figure 4This indicates the direction of refrigerant flow in cooling mode, where the structure of the air conditioner is related to... Figure 2 The process is the same. When the air conditioner is running in cooling mode, the compressor 400 discharges refrigerant. A portion of this refrigerant flows through the four-way valve 500 to the second heat exchange module 130. At this time, the high-temperature, high-pressure refrigerant condenses and releases heat upon entering the second heat exchange module 130, resulting in a high-pressure, two-phase gas-liquid refrigerant at the outlet of the second heat exchange module 130. This refrigerant then enters the phase separator 110 for gas-liquid separation. The other portion of the refrigerant enters the phase separator 110 through the second branch, specifically through the fourth interface a4.

[0082] The refrigerant entering the phase separator 110 undergoes gas-liquid separation. The liquid refrigerant separated in the phase separator 110 collects at the bottom of the tank and exits through the bottom liquid outlet pipe (second port a2), then flows through the first branch to the indoor heat exchanger 200. The gaseous refrigerant separated by the phase separator 110 enters the first heat exchange module 120 through the upper port (first port a1) of the tank. The first heat exchange module 120 condenses the gaseous refrigerant, and the condensed refrigerant merges with the liquid refrigerant exiting the throttling device and enters the indoor heat exchanger 200. The refrigerant flowing out of the outdoor heat exchanger is throttled by the indoor electronic expansion valve and then enters the indoor heat exchanger 200 for evaporation and heat absorption, yielding gaseous refrigerant. The gaseous refrigerant returns to the gas-liquid separator 300 and compressor 400 through the four-way valve 500, completing one refrigeration cycle. The throttling device of the phase separator 110 is opened when the compressor 400 is running at high frequency, which further improves the refrigerant dryness at the upper outlet of the phase separator 110, i.e., from the first interface a1 to the inlet of the first heat exchange module 120. When the compressor 400 is running at low frequency, the second throttling component 101 is closed to prevent gas from being carried in the liquid outlet pipe.

[0083] In this embodiment, the heat exchange capacity of the outdoor unit is improved by setting a phase separator 110. The first throttling component 108 at the bottom of the phase separator 110 can prevent oil from accumulating in the tank and has an oil-draining effect.

[0084] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, or mobile phone, or an electronic device or air conditioner capable of performing the above functions. The following description uses an air conditioner controller as an example to illustrate this embodiment and the subsequent embodiments.

[0085] Based on this, the embodiments of this application provide a control method for an air conditioner, referring to... Figure 5 , Figure 5 This is a flowchart illustrating the first embodiment of the control method for the air conditioner of this application.

[0086] In this embodiment, the control method of the air conditioner includes steps S10 to S20:

[0087] Step S10: Obtain the temperature parameters of the air conditioner corresponding to the operating mode according to the operating mode of the air conditioner.

[0088] Optionally, the operating modes of the air conditioner include cooling mode and heating mode.

[0089] Optionally, the temperature parameters include the pipe temperature of the first or second branch in the bypass branch. Optionally, the temperature parameters include the low-pressure saturation temperature and the high-pressure saturation temperature of the compressor.

[0090] It should be noted that the low-pressure saturation temperature refers to the temperature at which the refrigerant reaches saturation under low-pressure conditions. During this process, the refrigerant absorbs heat in the evaporator, changing from a liquid to a gaseous state, or a gas-liquid mixture. When the refrigerant reaches saturation, it can no longer absorb more heat, and the cooling effect is maximized. The saturation temperature determines the phase change state of the refrigerant, affecting the cooling efficiency and operating temperature of the refrigeration system.

[0091] The low-pressure saturation temperature can be determined by consulting the saturation temperature table for the corresponding refrigerant. These tables typically provide the saturation temperature at different temperatures as a function of pressure. For example, for R22 refrigerant, if the low-pressure side pressure is 0.5 MPa, the corresponding saturation temperature can be determined by consulting the R22 saturation temperature table. However, the saturation temperature will vary depending on factors such as the type of refrigerant, system design, and operating conditions.

[0092] High-pressure saturation temperature refers to the temperature at which a refrigerant reaches saturation under high-pressure conditions. In the condenser, the refrigerant releases heat, changing from a gaseous state to a liquid state, or a gas-liquid mixture. When the refrigerant reaches saturation, it can no longer release more heat. The saturation temperature determines the phase change state of the refrigerant, affecting the refrigeration efficiency and operating temperature of the refrigeration system.

[0093] High-pressure saturation temperature refers to the temperature at which refrigerant vapor condenses into a liquid state under a certain pressure inside the condenser. The high-pressure corresponding saturation temperature is the temperature at which the refrigerant reaches saturation during the condensation process, and it corresponds one-to-one with the condensation pressure.

[0094] In heating mode, the air conditioner's temperature parameters include the pipe temperature of the second branch and the low-pressure saturation temperature of the compressor. In cooling mode, the air conditioner's temperature parameters include the pipe temperature of the second branch and the high-pressure saturation temperature of the compressor.

[0095] Step S20: Control the operation of the second throttling component according to the temperature parameter.

[0096] In this embodiment, in heating mode, a fuzzy logic controller adjusts the opening of the second throttling component based on the deviation between the pipe temperature and the low-pressure saturation temperature. Fuzzy logic can handle nonlinear and imprecise system characteristics, providing a more flexible control strategy.

[0097] Optionally, in heating mode, the opening of the second throttling component is adjusted by a PID (Proportional-Integral-Derivative) controller based on the set saturation temperature and the actual detected refrigerant pipe temperature to achieve rapid response and reduce overshoot.

[0098] Optionally, in heating mode, a neural network is used to learn and simulate the nonlinear characteristics of the system, and the opening of the second throttling component is automatically adjusted according to the input pipe temperature and low-pressure saturation temperature.

[0099] In this embodiment, in cooling mode, a fuzzy logic controller adjusts the opening of the second throttling component based on the deviation between the pipe temperature and the high-pressure saturation temperature. Fuzzy logic can handle nonlinear and imprecise system characteristics, providing a more flexible control strategy.

[0100] Optionally, the opening of the second throttling component can be adjusted by a PID controller based on the high-pressure saturation temperature and the actual detected pipe temperature to achieve fast response and reduce overshoot.

[0101] Alternatively, a neural network can be used to learn and simulate the nonlinear characteristics of the system, and automatically adjust the opening of the second throttling component based on the input pipe temperature and high-pressure saturation temperature.

[0102] In the technical solution of this embodiment, the operation of the second throttling component is controlled by temperature parameters, thereby controlling the amount of refrigerant in the outdoor heat exchanger, increasing the dryness of the refrigerant in the outdoor heat exchanger, and keeping the refrigerant temperature in the outdoor heat exchanger within a suitable temperature range, thereby improving the working efficiency of the air conditioner.

[0103] Based on the first embodiment of this application, in the second embodiment of this application, the same or similar content as the above embodiment can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 6 Step S10 includes:

[0104] Step S11: Obtain the pipe temperature of the second branch and the low-pressure saturation temperature of the compressor;

[0105] Step S20 includes:

[0106] Step S21: Control the operation of the second throttling component according to the pipe temperature and the low-pressure saturation temperature.

[0107] When the air conditioner is in heating mode, the pipe temperature detected by the temperature sensor on the second branch is obtained.

[0108] It should be noted that in the air conditioner's heating mode, the refrigerant flows from the first heat exchange module to the first interface (a1 port) of the phase separator. A temperature sensor is located between the first heat exchange module and the first interface of the phase separator, and the pipe temperature is the refrigerant pipe temperature detected by this temperature sensor. This pipe temperature represents the refrigerant temperature in that section of the pipe.

[0109] When the air conditioner is in heating mode, the compressor discharges through a four-way valve into the indoor heat exchanger. At this time, the high-temperature, high-pressure refrigerant condenses and cools down in the heat exchanger, becoming liquid refrigerant. This liquid refrigerant enters the outdoor unit. One branch passes through the outdoor unit's electronic expansion valve into the first heat exchange module for evaporation and heat exchange, resulting in a two-phase refrigerant. This two-phase refrigerant then enters the phase separator through the first interface a1. The other branch of liquid refrigerant passes through a throttling device and then enters the phase separator through the second interface a2.

[0110] The phase separator performs gas-liquid separation on the refrigerant entering the first heat exchange module and the refrigerant entering the throttling device. The gaseous refrigerant in the phase separator flows out through the top gas pipe (fourth port a4) and enters the four-way valve through the second throttling component. The liquid refrigerant in the phase separator flows out through the bottom liquid pipe (third port a3), enters the second heat exchange module for evaporation and heat absorption, and becomes gaseous refrigerant, which flows to the four-way valve. The refrigerant entering the four-way valve returns to the gas-liquid separator after passing through the four-way valve, and finally returns to the compressor suction port, completing the heating cycle. The second throttling component of the phase separator is used to regulate the gas output, preventing the valve from opening too wide, which would cause liquid carryover in the gas and affect the heating capacity, and preventing the valve from opening too narrowly, which would affect the phase separation and extraction effect.

[0111] By adopting the above scheme, the refrigerant flow rate entering the first heat exchange module can be reduced, and the flow length of the refrigerant in the first heat exchange module at high dryness can be increased. The heat transfer coefficient of the refrigerant first increases and then decreases with the increase of dryness. Secondly, refrigerant can be added to the second heat exchange module of the outdoor unit, increasing the refrigerant flow rate in the second heat exchange module.

[0112] It should be noted that maintaining an appropriate refrigerant flow rate in the evaporator is essential to ensure that the evaporation temperature remains within the optimal operating range in heating mode, thereby improving the overall efficiency and performance of the air conditioning system.

[0113] Optionally, in heating mode, when the difference between the pipe temperature and the low-pressure saturation temperature is less than the first temperature threshold, it indicates that the refrigerant flow in the evaporator is too high, resulting in an excessively low evaporation temperature. This is detrimental to heating efficiency because the lower the evaporation temperature, the greater the required compression power, leading to lower heating efficiency. In this case, it is necessary to control the second throttling component to close less, reducing the refrigerant flow to increase the evaporation temperature and thus improve heating efficiency.

[0114] Optionally, in heating mode, when the difference between the pipe temperature and the low-pressure saturation temperature is greater than or equal to the first temperature threshold, it indicates that the refrigerant flow of the evaporator is too low, resulting in a high evaporation temperature and affecting the heating efficiency. In this case, it is necessary to control the second throttling component to open wider to increase the refrigerant flow, thereby reducing the evaporation temperature and improving the heating efficiency.

[0115] In one embodiment, while performing step S21, the operating frequency of the compressor is also controlled based on the pipe temperature and the low-pressure saturation temperature. It should be noted that within the preset target temperature range, the refrigerant exiting the phase separator is in the refrigerant dryness range with the highest heat transfer coefficient. Specifically, when the difference between the pipe temperature and the low-pressure saturation temperature is within the preset target temperature range, the compressor operating frequency is determined according to a preset first frequency value; when the difference between the pipe temperature and the low-pressure saturation temperature is not within the preset target temperature range, the compressor operating frequency is determined according to a preset second frequency value, where the first frequency value is greater than the second frequency value.

[0116] In the technical solution of this embodiment, by setting a phase separator, the heat exchange capacity of the outdoor unit is improved in heating mode. By controlling the operation of the second throttling component according to the pipe temperature and low-pressure saturation temperature, the refrigerant flow rate is adjusted so that the evaporation temperature of the outdoor heat exchanger is within a suitable temperature range, thereby improving the heating efficiency.

[0117] Based on the first or second embodiment of this application, in the third embodiment of this application, the content that is the same as or similar to the above embodiments can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 7 Step S21 includes:

[0118] Step S211: Determine the difference between the pipe temperature and the low-pressure saturation temperature;

[0119] Step S212: When the difference is greater than or equal to a preset first temperature threshold, control the second throttling component to open wider;

[0120] Step S213: When the difference is less than a preset first temperature threshold, control the second throttling component to close.

[0121] It should be noted that when the difference is greater than or equal to the preset first temperature threshold, it indicates that the pipe temperature is significantly different from the low-pressure saturation temperature, and the amount of refrigerant being processed by the evaporator is too low. The amount of refrigerant in the refrigerant pipe can be increased, and the second throttling component is then opened wider.

[0122] When the difference is less than the preset first temperature threshold, it indicates that the pipe temperature is close to the low-pressure saturation temperature. The amount of refrigerant being processed by the evaporator is too high, and the amount of refrigerant in the refrigerant pipe needs to be reduced. Therefore, it is necessary to control the second throttling component to decrease.

[0123] Optionally, the second throttling component includes an electronic expansion valve. When the temperature difference is greater than or equal to a preset first temperature threshold, the electronic expansion valve is controlled to open wider according to a preset first step number; when the temperature difference is less than the preset first temperature threshold, the electronic expansion valve is controlled to close narrower according to a preset second step number. For example, such as... Figure 10 As shown, when operating in heating mode, the pipe temperature is Tin, the low-pressure saturation temperature corresponding to the low pressure is Tlow, and k is the first temperature threshold. When Tin - Tlow < k, the electronic expansion valve is controlled to close n steps. When Tin - Tlow ≥ k, the electronic expansion valve is controlled to open m steps.

[0124] In the technical solution of this embodiment, the operation of the second throttling component is controlled according to the difference between the pipe temperature and the low-pressure saturation temperature to adjust the refrigerant flow rate so that the evaporation temperature of the outdoor heat exchanger is within a suitable temperature range, thereby improving the heating efficiency.

[0125] Based on any of the first to third embodiments of this application, in the fourth embodiment of this application, the content that is the same as or similar to the above embodiments can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 8 Step S10 includes:

[0126] Step S12: Obtain the pipe temperature of the second branch and the high-pressure saturation temperature of the compressor;

[0127] Step S20 includes:

[0128] Step S22: Control the operation of the second throttling component according to the pipe temperature and the high-pressure saturation temperature.

[0129] When the air conditioner is running in cooling mode, the compressor discharges refrigerant. A portion of this refrigerant flows through a four-way valve to the second heat exchange module of the outdoor unit. At this point, the high-temperature, high-pressure refrigerant condenses and releases heat upon entering the second heat exchange module, resulting in a high-pressure, two-phase gas-liquid refrigerant at the module outlet. This refrigerant then enters the phase separator for gas-liquid separation. The other portion of the refrigerant enters the phase separator through the second throttling device, specifically through the fourth port a4. The refrigerant undergoes gas-liquid separation in the phase separator. The separated liquid refrigerant collects at the bottom of the tank and exits through the bottom liquid outlet pipe (second port a2). After passing through the throttling device, it flows out to the indoor heat exchanger.

[0130] The gaseous refrigerant separated by the phase separator enters the first heat exchange module through the upper interface (first interface a1) of the tank. The first heat exchange module condenses the gaseous refrigerant, and the condensed refrigerant merges with the liquid refrigerant from the throttling device and enters the indoor heat exchanger. The refrigerant flowing out of the outdoor unit is throttled by the electronic expansion valve of the indoor heat exchanger and then evaporates and absorbs heat in the indoor heat exchanger to obtain gaseous refrigerant. The gaseous refrigerant returns to the gas-liquid separator and compressor suction through the four-way valve, completing one refrigeration cycle.

[0131] The second throttling component of the phase separator opens when the compressor is running at high frequency, further increasing the refrigerant dryness from the upper outlet of the phase separator, i.e., the first interface a1, to the inlet of the first heat exchange module. When the compressor is running at low frequency, the second throttling component closes to prevent gas from being carried in the liquid outlet pipe.

[0132] It should be noted that in the cooling mode of the air conditioner, the refrigerant flows out from the first interface of the phase separator, namely interface a1, to the first heat exchange module. The temperature sensor is set between the first heat exchange module and the first interface of the phase separator. The pipe temperature is the refrigerant pipe temperature detected by the temperature sensor. At this time, the refrigerant pipe temperature represents the refrigerant temperature in this section of the pipe.

[0133] It should be noted that maintaining an appropriate refrigerant flow rate in the condenser is necessary to ensure that the condensing temperature remains within the optimal operating range in cooling mode, thereby improving the overall efficiency and performance of the air conditioning system.

[0134] Optionally, in cooling mode, when the difference between the pipe temperature and the high-pressure saturation temperature is less than the second temperature threshold, it indicates that the refrigerant flow rate in the condenser is too low, and the cooling efficiency will also be affected. In this case, it is necessary to control the second throttling component to open wider, allowing more refrigerant to pass through the system. This can increase the refrigerant flow rate in the evaporator and the rate at which it absorbs heat, so that the air conditioning system can more effectively remove heat from the room, improving the overall condensing efficiency and performance.

[0135] Optionally, in cooling mode, when the difference between the pipe temperature and the high-pressure saturation temperature is greater than or equal to the third temperature threshold, it indicates that the refrigerant flow in the condenser is too high, which is detrimental to cooling efficiency. In this case, it is necessary to reduce the flow of the second throttling component to decrease the refrigerant flow rate and its velocity through the evaporator, thereby reducing the rate at which the refrigerant absorbs heat in the evaporator and thus lowering the condensing temperature.

[0136] Optionally, step S22 includes: when the air conditioner compressor is at a first operating frequency, performing the step of controlling the operation of the second throttling component based on the pipe temperature and high-pressure saturation temperature; when the air conditioner compressor is at a second operating frequency, controlling the second throttling component to close, wherein the first operating frequency is greater than the second operating frequency. For example, the first operating frequency is a high-frequency operating frequency, i.e., an operating frequency with a frequency greater than a preset first threshold, and the second operating frequency is a low-frequency operating frequency, i.e., an operating frequency with a frequency less than a preset second threshold. The second throttling component opens during high-frequency operation of the compressor, further increasing the refrigerant dryness from the upper outlet of the phase separator to the inlet of the first heat exchange module; the second throttling component closes during low-frequency operation of the compressor to prevent gas from being carried over to the liquid outlet pipe.

[0137] In the technical solution of this embodiment, by setting a phase separator, the heat exchange capacity of the outdoor unit as a condenser is improved in the cooling mode. By controlling the operation of the second throttling component according to the pipe temperature and high pressure saturation temperature, the refrigerant flow rate is adjusted so that the condensing temperature of the outdoor heat exchanger is within a suitable temperature range, thereby improving the cooling efficiency.

[0138] Based on any of the first to fourth embodiments of this application, in the fifth embodiment of this application, the content that is the same as or similar to the above embodiments can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 9 Step S22 includes:

[0139] Step S221: Determine the temperature difference between the pipe temperature and the high-pressure saturation temperature;

[0140] Step S222: When the temperature difference is greater than a preset second temperature threshold, control the second throttling component to close.

[0141] Step S223: When the temperature difference is less than the preset third temperature threshold, control the second throttling component to open wider.

[0142] It should be noted that when the temperature difference is greater than the preset second temperature threshold, it means that the pipe temperature is significantly different from the high-pressure saturation temperature, and the amount of refrigerant being processed by the condenser is too high. Therefore, it is necessary to reduce the amount of refrigerant in the refrigerant pipe, and thus control the second throttling component to decrease.

[0143] When the temperature difference is less than the preset third temperature threshold, it indicates that the pipe temperature is close to the high-pressure saturation temperature. The amount of refrigerant being processed by the condenser is too low. The amount of refrigerant in the refrigerant pipe can be increased, and the second throttling component is then opened wider.

[0144] Optionally, the second throttling component includes an electronic expansion valve. When the temperature difference is greater than a preset second temperature threshold, the electronic expansion valve is controlled to close slightly according to a preset third step; when the temperature difference is less than the preset third temperature threshold, the electronic expansion valve is controlled to open slightly according to a preset fourth step. For example, such as... Figure 10As shown, in cooling mode, the pipe temperature is Tin, the high-pressure saturation temperature corresponding to the high pressure is Thigh, a is the preset third temperature threshold, and b is the preset fourth temperature threshold. When Tin - Thigh < a, the electronic expansion valve is opened by x steps; when Tin - Thigh > b, the electronic expansion valve is closed by y steps.

[0145] In the technical solution of this embodiment, the operation of the second throttling component is controlled according to the difference between the pipe temperature and the high-pressure saturation temperature to adjust the refrigerant flow rate so that the condensing temperature of the outdoor heat exchanger is within a suitable temperature range, thereby improving the refrigeration efficiency.

[0146] It should be noted that the above examples are only for understanding this application and do not constitute a limitation on the control method of the air conditioner in this application. Any simple modifications based on this technical concept are within the protection scope of this application.

[0147] This application provides an air conditioner, the air conditioner including a control device, the control device including: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the air conditioner control method of the above embodiment 1.

[0148] The following is for reference. Figure 11 The diagram illustrates a structural schematic of a control device suitable for implementing an air conditioner according to embodiments of this application. The control device for the air conditioner in these embodiments may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital radio receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Description), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 11 The control device of the air conditioner shown is merely an example and should not impose any limitation on the function and scope of use of the embodiments of this application.

[0149] like Figure 11As shown, the control device of the air conditioner may include a processing unit 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. The RAM 1004 also stores various programs and data required for the operation of the air conditioner's control device. The processing unit 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touchscreen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage devices 1003 including, for example, magnetic tape, hard disk, etc.; and communication devices 1009. The communication device 1009 allows the air conditioner's control equipment to communicate wirelessly or wiredly with other devices to exchange data. Although the figure shows control equipment for an air conditioner with various systems, it should be understood that implementing or having all the systems shown is not required. More or fewer systems may be implemented alternatively.

[0150] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from ROM 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.

[0151] The air conditioner control device provided in this application, employing the air conditioner control method described in the above embodiments, can solve the technical problem of low air conditioner operating efficiency due to the inability to adjust refrigerant dryness under different operating modes. Compared with the prior art, the beneficial effects of the air conditioner control device provided in this application are the same as those of the air conditioner control method provided in the above embodiments, and other technical features in the air conditioner control device are the same as those disclosed in the previous embodiment method, and will not be repeated here.

[0152] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0153] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0154] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the air conditioner control method of the above embodiments.

[0155] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0156] The aforementioned computer-readable storage medium may be included in the control device of the air conditioner; or it may exist independently and not be assembled into the control device of the air conditioner.

[0157] The aforementioned computer-readable storage medium carries one or more programs. When the aforementioned one or more programs are executed by the control device of the air conditioner, the control device of the air conditioner controls the amount of refrigerant in the outdoor heat exchanger by setting a phase separator and a throttling component, increases the refrigerant dryness in the outdoor heat exchanger, keeps the refrigerant temperature in the outdoor heat exchanger within a suitable temperature range, enhances the heat exchange capacity of the outdoor unit, and thus improves the working efficiency of the air conditioner.

[0158] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0159] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0160] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.

[0161] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the control method of the air conditioner described above. This solves the technical problem of low operating efficiency of the air conditioner due to the inability to adjust the refrigerant dryness under different operating modes. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the control method of the air conditioner provided in the above embodiments, and will not be repeated here.

[0162] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the air conditioner control method described above.

[0163] The computer program product provided in this application can solve the technical problem of low operating efficiency of air conditioners due to the inability to adjust the refrigerant dryness under different operating modes. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as the beneficial effects of the air conditioner control method provided in the above embodiments, and will not be repeated here.

[0164] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. An air conditioner, characterized in that, The air conditioner includes: Compressor, four-way valve, outdoor heat exchanger, indoor heat exchanger, throttling device, bypass branch and phase separator; The outdoor heat exchanger includes a first heat exchange module and a second heat exchange module; The compressor's exhaust port is connected to the first port of the four-way valve, the second heat exchange module is connected to the second port of the four-way valve, the compressor's intake port is connected to the third port of the four-way valve, and the indoor heat exchanger is connected to the fourth port of the four-way valve. The indoor heat exchanger, the throttling device, the first heat exchange module, the phase separator, and the second heat exchange module are connected in sequence; the outlet of the phase separator is connected in sequence to the suction port of the compressor; one end of the bypass branch is connected to the phase separator, and the bypass branch is connected in parallel with the flow path of the first heat exchange module and / or the bypass branch is connected in parallel with the flow path of the second heat exchange module.

2. The air conditioner as described in claim 1, characterized in that, The phase separator includes a first interface, a second interface, and a third interface. One end of the first heat exchange module is connected to the first interface, and one end of the second heat exchange module is connected to the third interface. The bypass branch includes a first branch. One end of the first branch is connected between the throttling device and the indoor heat exchanger or between the throttling device and the first heat exchange module. The other end of the first branch is connected to the second interface. A first throttling component is provided in the first branch.

3. The air conditioner as described in claim 1 or 2, characterized in that, The phase separator includes a first interface, a third interface, and a fourth interface. One end of the first heat exchange module is connected to the first interface, and one end of the second heat exchange module is connected to the third interface. The bypass branch includes a second branch. One end of the second branch is connected between the second heat exchange module and the second port, and the other end of the second branch is connected to the fourth interface. A second throttling component is provided in the second branch.

4. A control method for an air conditioner, characterized in that, Applied to the air conditioner of claim 3, the method includes: According to the operating mode of the air conditioner, obtain the temperature parameters of the air conditioner corresponding to the operating mode; The second throttling component is controlled to operate according to the temperature parameters.

5. The method as described in claim 4, characterized in that, When the air conditioner is operating in heating mode, the step of obtaining the temperature parameters of the air conditioner corresponding to the operating mode includes: Obtain the pipe temperature of the second branch and the low-pressure saturation temperature of the compressor; The step of controlling the operation of the second throttling component according to the temperature parameter includes: The operation of the second throttling component is controlled based on the pipe temperature and the low-pressure saturation temperature.

6. The method as described in claim 5, characterized in that, The step of controlling the operation of the second throttling component based on the pipe temperature and the low-pressure saturation temperature includes: Determine the difference between the pipe temperature and the low-pressure saturation temperature; When the difference is greater than or equal to a preset first temperature threshold, the second throttling component is controlled to open wider; When the difference is less than a preset first temperature threshold, the second throttling component is controlled to close.

7. The method as described in claim 6, characterized in that, The second throttling component includes an electronic expansion valve, and the step of controlling the opening of the second throttling component includes: The electronic expansion valve is opened according to the preset first step number; The step of controlling the second throttling component to close includes: The electronic expansion valve is controlled to close slightly according to the preset second step.

8. The method as described in claim 4, characterized in that, When the air conditioner is operating in cooling mode, the step of obtaining the temperature parameter of the air conditioner corresponding to the operating mode includes: Obtain the pipe temperature of the second branch and the high-pressure saturation temperature of the compressor; The step of controlling the operation of the second throttling component according to the temperature parameter includes: The operation of the second throttling component is controlled based on the pipe temperature and the high-pressure saturation temperature.

9. The method as described in claim 8, characterized in that, The step of controlling the operation of the second throttling component based on the pipe temperature and the high-pressure saturation temperature includes: Determine the temperature difference between the pipe temperature and the high-pressure saturation temperature; When the temperature difference is greater than a preset second temperature threshold, the second throttling component is controlled to close. When the temperature difference is less than a preset third temperature threshold, the second throttling component is controlled to open wider.

10. The method as described in claim 5, characterized in that, The second throttling component includes an electronic expansion valve, and the step of controlling the second throttling component to close includes: The electronic expansion valve is controlled to close slightly according to the preset third step. The step of controlling the opening of the second throttling component includes: The electronic expansion valve is opened according to the preset fourth step.

11. The method as described in claim 8, characterized in that, The step of controlling the operation of the second throttling component based on the pipe temperature and the high-pressure saturation temperature includes: When the air conditioner compressor is at the first operating frequency, the step of controlling the operation of the second throttling component according to the pipe temperature and the high-pressure saturation temperature is executed. When the air conditioner compressor is at the second operating frequency, the throttling device is controlled to close, and the first operating frequency is greater than the second operating frequency.

12. An air conditioner, characterized in that, The air conditioner includes a control device, the control device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the control method for the air conditioner as described in any one of claims 4 to 11.

13. A computer-readable storage medium, characterized in that, The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, it implements the steps of the control method for the air conditioner as described in any one of claims 4 to 11.

14. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the steps of the control method for an air conditioner as described in any one of claims 4 to 11.

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