Defrosting control method, controller, air conditioner and storage medium for air conditioner

Abstract

Embodiments of the present application provide a defrosting control method, a controller, an air conditioner and a storage medium, comprising a spray enthalpy compressor, a primary heat exchanger, a secondary heat exchanger, a first throttling component and a second throttling component, in the heating mode, the switching state of the second throttling component is obtained; in the case where the switching state remains unchanged, the reference outlet temperature of the outdoor heat exchanger in a preset time period is obtained, the defrosting condition is determined according to the reference outlet temperature; the outdoor environment temperature and the real-time outlet temperature of the outdoor heat exchanger are obtained; when the outdoor environment temperature and the real-time outlet temperature meet the defrosting condition, the air conditioner is controlled to perform the defrosting operation. For the two-stage enthalpy increasing system, after the second throttling component is opened, the defrosting period can be lengthened, and the low-temperature heating effect is improved; in addition, the defrosting condition is flexibly corrected, so that the defrosting condition is more suitable for the single-stage enthalpy increasing or two-stage enthalpy increasing operation of the air conditioner, the defrosting time is more ideal, and the low-temperature heating effect is improved.

Description

Technical Field

[0001] This application relates to the field of air conditioner technology, and in particular to a defrosting control method, controller, air conditioner, and storage medium for an air conditioner. Background Technology

[0002] In related technologies, the heating effect of air conditioners in winter is often less than ideal. Therefore, air conditioners on the market often employ a two-stage enthalpy-increasing system to enhance their low-temperature heating performance. However, the original defrosting logic of ordinary air conditioners is not suitable for two-stage enthalpy-increasing systems for the following reasons: First, for two-stage enthalpy-increasing systems, because the low pressure is increased at low temperatures, the amount of frost buildup decreases and the decay is slower, allowing for a longer continuous heating time. If the defrosting method of ordinary air conditioners is used, problems such as short defrosting cycles, poor heating capacity, and low average outlet air temperature will occur. Second, ordinary air conditioners determine the outlet temperature of the outdoor heat exchanger from the start of heating. However, for two-stage enthalpy-increasing systems, because the outlet temperature of the outdoor heat exchanger changes after the second-stage heat exchanger starts, if the outlet temperature of the outdoor heat exchanger is determined from the beginning, the outlet temperature of the outdoor heat exchanger will not be the desired value, resulting in unsatisfactory defrosting time and heating effect. Summary of the Invention

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes a defrosting control method, controller, air conditioner, and storage medium for an air conditioner, aiming to extend the defrosting cycle and improve the low-temperature heating effect.

[0004] In a first aspect, embodiments of this application provide a defrosting control method for an air conditioner, the air conditioner including an enthalpy-injecting compressor, a primary heat exchanger, a secondary heat exchanger, a first throttling component for controlling the enthalpy-injecting circuit of the primary heat exchanger, and a second throttling component for controlling the suction circuit of the secondary heat exchanger, the method comprising:

[0005] In heating mode, obtain the on / off state of the second throttling component;

[0006] With the switch state remaining unchanged, the reference outlet temperature of the outdoor heat exchanger within a preset time period is obtained, and the defrosting conditions are determined based on the reference outlet temperature.

[0007] Obtain the outdoor ambient temperature and the real-time outlet temperature of the outdoor heat exchanger;

[0008] When the outdoor ambient temperature and the real-time outlet temperature meet the defrosting conditions, the air conditioner is controlled to perform a defrosting operation.

[0009] According to some embodiments of this application, obtaining the reference outlet temperature of the outdoor heat exchanger within a preset time period includes:

[0010] After controlling the enthalpy compressor to run for a first preset time, the minimum outlet temperature of the outdoor heat exchanger within the preset time period is obtained as the reference outlet temperature.

[0011] According to some embodiments of this application, obtaining the minimum outlet temperature of the outdoor heat exchanger within a preset time period as the reference outlet temperature includes one of the following:

[0012] When the second throttling component is in the off state, the first minimum outlet temperature of the outdoor heat exchanger within a preset time period is used as the reference outlet temperature.

[0013] When the second throttling component is in the on state, the second minimum outlet temperature of the outdoor heat exchanger within a preset time period is used as the reference outlet temperature.

[0014] According to some embodiments of this application, obtaining the outdoor ambient temperature and the real-time outlet temperature of the outdoor heat exchanger includes:

[0015] After the air conditioner continues to run for a second preset period of time, the outdoor ambient temperature and the real-time outlet temperature of the outdoor heat exchanger are obtained.

[0016] According to some embodiments of this application, controlling the air conditioner to perform a defrosting operation when the outdoor ambient temperature and the real-time outlet temperature meet the defrosting conditions includes:

[0017] When the outdoor ambient temperature, the real-time outlet temperature and the operating status of the air conditioner meet the first defrosting conditions, the defrosting operation is performed after the third preset time.

[0018] The first defrosting conditions include the following:

[0019] The outdoor ambient temperature is greater than or equal to a first preset value;

[0020] The real-time outlet temperature is less than the second preset value;

[0021] The air conditioner is powered on for the first time or the standby time reaches the preset standby time.

[0022] According to some embodiments of this application, the step of controlling the air conditioner to perform a defrosting operation when the outdoor ambient temperature and the real-time outlet temperature meet the defrosting conditions further includes:

[0023] If the outdoor ambient temperature and the real-time outlet temperature do not meet the first defrosting condition but meet the second defrosting condition, continue running for a fourth preset time and then perform the defrosting operation.

[0024] The second defrosting conditions include the following:

[0025] The outdoor ambient temperature is greater than or equal to the first preset value;

[0026] The real-time outlet temperature is less than a third preset value and less than or equal to a preset comparison value, wherein the third preset value is less than the second preset value and the preset comparison value is greater than the reference outlet temperature.

[0027] According to some embodiments of this application, the step of controlling the air conditioner to perform a defrosting operation when the outdoor ambient temperature and the real-time outlet temperature meet the defrosting conditions further includes:

[0028] If the outdoor ambient temperature and the real-time outlet temperature do not meet the first defrosting condition and the second defrosting condition, but meet the third defrosting condition, continue to operate and determine whether the second defrosting condition is met.

[0029] When the second defrosting condition is met, continue running for the fourth preset time and then perform the defrosting operation;

[0030] If the second defrosting condition is not met, the defrosting operation will be performed after the fifth preset time, wherein the fifth preset time is less than the oil return cycle time.

[0031] The third defrosting condition includes the following:

[0032] The outdoor ambient temperature is greater than or equal to the first preset value;

[0033] The real-time outlet temperature is less than the first preset value but greater than the reference outlet temperature.

[0034] According to some embodiments of this application, the step of controlling the air conditioner to perform a defrosting operation when the outdoor ambient temperature and the real-time outlet temperature meet the defrosting conditions further includes:

[0035] If the outdoor ambient temperature and the real-time outlet temperature do not meet the first defrosting condition, the second defrosting condition, and the third defrosting condition, but meet the fourth defrosting condition, the defrosting operation will be performed after running for a sixth preset time.

[0036] The fourth defrosting condition includes the following:

[0037] The outdoor ambient temperature is lower than the first preset value;

[0038] The real-time outlet temperature is less than the preset comparison value.

[0039] According to some embodiments of this application, after determining the defrosting conditions based on the reference outlet temperature, the method further includes:

[0040] If the outdoor ambient temperature and the real-time outlet temperature do not meet the defrosting conditions, the defrosting operation will be performed after running for a seventh preset time, wherein the seventh preset time is less than the oil return cycle time.

[0041] Secondly, embodiments of this application also provide a controller, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the defrosting control method of the air conditioner as described in the first aspect above when running the computer program.

[0042] Thirdly, embodiments of this application also provide an air conditioner, including the controller described in the second aspect above.

[0043] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions for performing the defrosting control method for an air conditioner as described in the first aspect above.

[0044] According to the technical solution of the embodiments of this application, at least the following beneficial effects are achieved: For air conditioners with dual-stage enthalpy enhancement function, after the second throttling component is turned on, the low pressure at low temperature is increased, so the amount of frost is reduced and the decay is slower, and the continuous heating time can be longer. Therefore, the defrosting cycle can be greatly extended, and the low-temperature heating effect can be improved. In addition, since the outlet temperature of the outdoor heat exchanger will change after the secondary heat exchanger is turned on, the embodiments of this application will obtain the reference outlet temperature of the outdoor heat exchanger within a preset time period while keeping the switch state unchanged, so as to flexibly modify the defrosting conditions, thereby making the defrosting conditions more in line with the single-stage or dual-stage enthalpy enhancement operation of the air conditioner, and thus making the defrosting time more ideal and improving the low-temperature heating effect.

[0045] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0046] The accompanying drawings are used to provide a further understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0047] Figure 1 This is a schematic diagram of the structure of an air conditioner provided in one embodiment of this application;

[0048] Figure 2 This is a flowchart of a defrosting control method for an air conditioner provided in one embodiment of this application;

[0049] Figure 3This is a flowchart of a defrosting control method for an air conditioner provided in another embodiment of this application;

[0050] Figure 4 This is a flowchart of a defrosting control method for an air conditioner provided in another embodiment of this application;

[0051] Figure 5 This is a flowchart of a defrosting control method for an air conditioner provided in another embodiment of this application;

[0052] Figure 6 This is a flowchart of a defrosting control method for an air conditioner provided in another embodiment of this application;

[0053] Figure 7 This is a flowchart of a defrosting control method for an air conditioner provided in another embodiment of this application;

[0054] Figure 8 This is a flowchart of a defrosting control method for an air conditioner provided in another embodiment of this application;

[0055] Figure 9 This is a flowchart of a defrosting control method for an air conditioner provided in another embodiment of this application;

[0056] Figure 10 This is an overall flowchart of a defrosting control method for an air conditioner provided in one embodiment of this application;

[0057] Figure 11 This is a schematic diagram of a controller for performing a defrosting control method for an air conditioner, provided in one embodiment of this application. Detailed Implementation

[0058] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0059] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0060] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0061] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0062] In some situations, air conditioners often fail to provide adequate heating in winter. Therefore, air conditioners on the market employ two-stage enthalpy-increasing systems to enhance their low-temperature heating performance. However, the original defrosting logic of ordinary air conditioners is not suitable for two-stage enthalpy-increasing systems for the following reasons: First, with a two-stage enthalpy-increasing system, the low pressure is increased at low temperatures, resulting in less frost buildup and slower decay, allowing for longer continuous heating time. If the defrosting method of ordinary air conditioners is used, problems such as short defrosting cycles, poor heating capacity, and low average outlet air temperature will occur. Second, ordinary air conditioners determine the outdoor heat exchanger's outlet temperature from the start of heating. However, with a two-stage enthalpy-increasing system, the outdoor heat exchanger's outlet temperature changes after the second-stage heat exchanger starts. If the outdoor heat exchanger's outlet temperature is determined from the beginning, the outlet temperature will not be the desired value, leading to unsatisfactory defrosting time and heating performance.

[0063] Based on the above, this application proposes a defrosting control method, controller, air conditioner, and storage medium for an air conditioner, aiming to extend the defrosting cycle and improve the low-temperature heating effect.

[0064] The various embodiments of the air conditioner of this application will be further described below with reference to the accompanying drawings.

[0065] like Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of an air conditioner provided in one embodiment of this application.

[0066] In one embodiment, the air conditioner of this application includes, but is not limited to, an enthalpy-spraying compressor 100, a primary heat exchanger 210, a secondary heat exchanger 220, a first throttling assembly 310 for controlling the enthalpy-spraying circuit of the primary heat exchanger 210, and a second throttling assembly 320 for controlling the suction circuit of the secondary heat exchanger 220.

[0067] It should be noted that the first throttling component 310 is used to control the refrigerant flow rate in the enthalpy injection circuit, and the second throttling component 320 is used to control the refrigerant flow rate in the suction circuit. This embodiment controls the refrigerant flow rate in both the enthalpy injection circuit and the suction circuit by controlling the on / off states of the first throttling component 310 and the second throttling component 320.

[0068] It is understood that the first throttling component 310 and the second throttling component 320 can be electronic expansion valves, or include capillary tubes and solenoid valves. The embodiments of this application do not specifically limit the components of the first throttling component 310 and the second throttling component 320.

[0069] In addition, it is understood that the primary heat exchanger 210 and the secondary heat exchanger 220 can be economizers or other types of heat exchangers, and the embodiments of this application do not specifically limit them.

[0070] In one embodiment, the air conditioner of this application embodiment further includes, but is not limited to, an outdoor heat exchanger 400 and an indoor heat exchanger (not shown in the figure), wherein the inlet of the indoor heat exchanger is connected to the exhaust port of the enthalpy-injected compressor 100, and the outlet is connected to the main flow path of the primary heat exchanger 210; in addition, the inlet of the outdoor heat exchanger 400 is connected to the outlet of the main flow path of the secondary heat exchanger 220, and the outlet is connected to the return port of the enthalpy-injected compressor 100.

[0071] In another embodiment, in heating mode, the refrigerant flowing out of the exhaust port of the enthalpy-injected compressor 100 flows sequentially through the indoor heat exchanger, the main flow path of the primary heat exchanger 210, the main flow path of the secondary heat exchanger 220, and the outdoor heat exchanger 400 to the return port of the enthalpy-injected compressor 100; secondly, a portion of the refrigerant flowing out of the indoor heat exchanger or the main flow path of the primary heat exchanger 210 also flows through the suction circuit of the secondary heat exchanger 220 to the return port of the enthalpy-injected compressor 100; in addition, a portion of the refrigerant flowing out of the main flow path of the secondary heat exchanger 220 also flows through the enthalpy-injected circuit of the primary heat exchanger 210 to the enthalpy-increasing port of the enthalpy-injected compressor 100.

[0072] In one embodiment, the air conditioner of this application embodiment further includes, but is not limited to, a main throttling component 500, which is disposed between the main flow outlet of the secondary heat exchanger 220 and the inlet of the outdoor heat exchanger 400.

[0073] Understandably, the main throttling component 500 can control the refrigerant flow into the compressor return port through the outdoor heat exchanger 400.

[0074] It is understood that the main throttling component 500 can be an electronic expansion valve, or include a capillary tube and a check valve. The embodiments of this application do not specifically limit the components of the main throttling component 500.

[0075] In one embodiment, the air conditioner of this application embodiment further includes, but is not limited to, a main filter 640, a first filter 610, a second filter 620, and a third filter 630. The main filter 640 is disposed between the main flow outlet of the secondary heat exchanger 220 and the inlet of the outdoor heat exchanger 400. The first filter 610 is disposed between the main flow outlet of the secondary heat exchanger 220 and the inlet of the injection enthalpy circuit of the primary heat exchanger 210. The second filter 620 is disposed at the inlet of the main flow of the secondary heat exchanger 220. The third filter 630 is disposed between the indoor heat exchanger and the main flow inlet of the primary heat exchanger 210.

[0076] It is understandable that the main filter 640, the first filter 610, the second filter 620 and the third filter 630 work together in the air conditioner to ensure the cleanliness and normal operation of the system through multi-stage filtration.

[0077] The filter in the refrigerant circulation loop of an air conditioner is a crucial component. Its main function is to remove impurities and particles from the system, ensuring smooth refrigerant flow and thus maintaining the system's normal operation and efficiency. The following are some key functions of filters in air conditioning systems:

[0078] Impurity Removal: Various impurities may exist in the system, such as metal particles, welding slag, and dust. These impurities may originate from the manufacturing process or be generated during use due to component wear. Filters effectively intercept these impurities, preventing them from entering the system and causing damage.

[0079] Protecting Components: Many components in a system, such as the compressor, evaporator, and condenser, can be damaged by clogging or wear caused by impurities. Filters extend the lifespan of these components by removing these potential threats.

[0080] Maintaining efficiency: When impurities in the refrigerant circulation loop are removed by the filter, the refrigerant flows more smoothly, and heat exchange efficiency is improved. This helps to improve the overall performance of the air conditioner, including cooling and heating effects.

[0081] Preventing blockages: The tiny channels in the refrigerant circulation loop are easily clogged by impurities, hindering refrigerant flow. A filter prevents this, ensuring smooth system circulation.

[0082] System maintenance: The filter itself is a consumable and requires regular inspection and replacement. By checking the condition of the filter, the maintenance status of the system and potential problems can be assessed.

[0083] Environmental considerations: Filters help reduce refrigerant leakage, thereby minimizing environmental impact. Refrigerant leaks not only affect air conditioning performance but can also harm the environment.

[0084] In one embodiment, the air conditioner of this application embodiment further includes, but is not limited to, an electronically controlled radiator 700 for dissipating heat from the electronic control board, wherein the refrigerant inlet of the electronically controlled radiator 700 is connected to the outlet of the main flow path of the first-stage economizer, and the refrigerant outlet of the electronically controlled radiator 700 is connected to the inlet of the main flow path of the second-stage economizer.

[0085] Understandably, by having the refrigerant enter at the inlet of the electronically controlled radiator 700, pass through it, and then flow from the outlet through the main throttling component 500 to the outdoor heat exchanger 400, efficient heat transfer and dissipation are achieved. This helps ensure the stable operation of the electronic control board and prevents performance degradation or malfunctions caused by overheating. Furthermore, the refrigerant flow in the electronically controlled radiator 700 carries away the heat dissipated by the power devices on the electronic control board, ensuring the normal operation of the power devices.

[0086] In one embodiment, the air conditioner of this application embodiment further includes, but is not limited to, a first liquid storage tank 810 and a second liquid storage tank 820, wherein the inlet of the first liquid storage tank 810 is connected to the outlet of the outdoor heat exchanger 400 and the outlet of the suction circuit of the secondary economizer, and the outlet of the first liquid storage tank 810 is connected to the return port of the enthalpy-increasing compressor; in addition, the inlet of the second liquid storage tank 820 is connected to the outlet of the injection enthalpy circuit of the primary economizer, and the outlet of the second liquid storage tank 820 is connected to the enthalpy-increasing port of the enthalpy-increasing compressor.

[0087] The liquid receiver in an air conditioner's refrigerant circulation loop is a crucial component, performing multiple functions in the heating system, including storing refrigerant, stabilizing pressure, and separating gas and liquid. The following are the main roles of the liquid receiver in an air conditioning system:

[0088] Refrigerant Storage: The receiver tank provides a place to store excess refrigerant. During the operation of the heating system, some refrigerant may fail to enter the evaporator or condenser in time. The receiver tank can temporarily store this refrigerant to ensure the normal operation of the system.

[0089] Pressure Stabilization: The receiver-dryer helps stabilize the pressure in the system. When the heating system starts or stops, the pressure in the system may change. The receiver-dryer can absorb these pressure fluctuations, reducing the impact on the compressor and other components.

[0090] Gas-Liquid Separation: The receiver-liquid tank separates the refrigerant into gaseous and liquid states. When the refrigerant exits the compressor, it may be in a high-pressure, hot gaseous state. The receiver-liquid tank allows the hot gaseous refrigerant to be cooled and partially liquefied, thereby reducing the amount of gas entering the condenser and improving heat exchange efficiency.

[0091] Reduced pulsation and noise: The receiver-dryer reduces refrigerant pulsation in the system, thereby lowering system noise and vibration. This is crucial for improving air conditioner comfort and minimizing environmental disturbance.

[0092] Filtration and drying: The receiver tank is typically equipped with filtration and drying functions to remove impurities and moisture from the refrigerant. This helps prevent ice blockage and corrosion problems in the system, extending the service life of system components.

[0093] System maintenance and repair: The presence of the refrigerant receiver makes the maintenance and repair of the heating system much more convenient. The receiver provides a convenient access point when refrigerant needs to be added or replaced. At the same time, the system's operating status can be assessed by observing the refrigerant condition in the receiver.

[0094] In summary, the receiver liner plays a crucial role in the refrigerant circulation loop of an air conditioner. It not only helps improve the overall efficiency and stability of the system but also contributes to maintaining its long-term health and reliability. Regular inspection and maintenance of the receiver liner to ensure its good working condition is essential for maintaining the performance of the air conditioning system.

[0095] In one embodiment, the air conditioner of this application embodiment further includes, but is not limited to, a gas-liquid separator 900, wherein the inlet of the gas-liquid separator 900 is connected to the outlet of the outdoor heat exchanger 400 and the outlet of the suction circuit of the secondary economizer, and the outlet of the gas-liquid separator 900 is connected to the first liquid storage tank 810.

[0096] Understandably, the gas-liquid separator 900 is used to separate the gas and liquid in the refrigerant, thereby ensuring that the gas and liquid in the refrigerant flow according to the needs of the air conditioner.

[0097] The gas-liquid separator 900 in the refrigerant circulation loop of an air conditioner is a component specifically designed to separate the gaseous and liquid components in the refrigerant. Its main function is to ensure that the refrigerant is in the appropriate liquid state before entering the compressor, thereby improving system efficiency and stability. The following are some key functions of the gas-liquid separator 900 in an air conditioning system:

[0098] Reducing the risk of liquid slugging: If liquid refrigerant is drawn into the compressor during operation, liquid slugging may occur, which can damage the compressor. The gas-liquid separator 900 reduces the risk of liquid slugging by separating gaseous and liquid refrigerant, ensuring that only gaseous refrigerant enters the compressor.

[0099] Improved Energy Efficiency: The 900 gas-liquid separator helps improve system energy efficiency. When refrigerant enters the compressor in a gaseous state, its compression efficiency is higher. By separating the liquid refrigerant, it ensures that the compressor draws in gaseous refrigerant, thereby improving the overall system energy efficiency.

[0100] Stable system operation: The gas-liquid separator 900 helps maintain stable system operation by stabilizing the state of the refrigerant entering the compressor. This helps avoid pressure fluctuations and system failures caused by unstable refrigerant conditions.

[0101] Compressor Protection: Liquid refrigerant entering the compressor can damage internal components such as valve plates and piston rings. The 900 gas-liquid separator effectively separates the liquid refrigerant, protecting the compressor from damage.

[0102] Optimized heat exchange: The gas-liquid separator 900 ensures that the liquid refrigerant can fully participate in the heat exchange process, improving the heat exchange efficiency of the evaporator and condenser.

[0103] Reduced maintenance costs: By reducing the risk of liquid slugging and damage to the compressor, the gas-liquid separator 900 helps reduce the maintenance costs and frequency of repairs for air conditioning systems.

[0104] System Diagnosis: The operating status of the gas-liquid separator 900 can serve as an indicator of the system's health. If any abnormalities are found within the gas-liquid separator 900, it may indicate other system problems requiring further inspection and maintenance.

[0105] In summary, the gas-liquid separator 900 plays a crucial role in the refrigerant circulation loop of an air conditioner. By ensuring that the refrigerant enters the compressor in the proper condition, it helps improve the system's efficiency, stability, and reliability. Regularly inspecting and maintaining the gas-liquid separator 900 to ensure its good working condition is essential for maintaining the performance of the air conditioning system.

[0106] In one embodiment, the air conditioner of this application embodiment also includes, but is not limited to, a four-way valve 1000. The four-way valve 1000 is provided with a first input port, a second input port, a first output port and a second output port. The first input port is connected to the exhaust port of the enthalpy-injected compressor 100, the first output port is connected to the indoor heat exchanger, the second input port is connected to the outdoor heat exchanger 400, and the second output port is connected to the return port of the enthalpy-injected compressor 100.

[0107] Understandably, the four-way valve 1000 ensures the correct flow of refrigerant, thereby ensuring the normal operation of the air conditioner.

[0108] In another embodiment, the air conditioner also includes an oil separator 1110, a fourth filter 1120, and a capillary tube 1130. The oil separator 1110 is provided with a first port, a second port, and a third port. The first port is connected to the exhaust port, the second port is connected to the indoor heat exchanger, and the third port is connected to the return air port through the fourth filter 1120 and the capillary tube 1130.

[0109] Understandably, the oil separator 1110 effectively separates lubricating oil from the refrigerant, ensuring that the lubricating oil can smoothly return to the compressor, thereby preventing the compressor from being damaged due to lack of oil and extending the compressor's service life; the fourth filter 1120 can filter out impurities in the refrigerant, ensuring the cleanliness of the system and preventing impurities from damaging the system; the capillary tube is used to convert high-pressure refrigerant into low-pressure refrigerant, thereby achieving effective heat transfer and release.

[0110] Additionally, it is understandable that when the third port of the oil separator 1110 is connected to the return port through the fourth filter 1120 and the capillary tube, the oil separator 1110 ensures the normal circulation of lubricating oil, the fourth filter 1120 keeps the system clean, and the capillary tube enables the throttling and pressure reduction of the refrigerant and precise control of the evaporation temperature, thereby helping to improve the overall performance and reliability of the air conditioner and provide a more comfortable and efficient heating experience.

[0111] Based on the hardware structure of the air conditioner in the above embodiments, the following presents various embodiments of the defrosting control method for the air conditioner of this application.

[0112] like Figure 2 As shown, Figure 2 This is a flowchart of a defrosting control method for an air conditioner provided in one embodiment of this application; the defrosting control method can be applied to the air conditioner of the above embodiment, including but not limited to steps S210, S220, S230 and S240.

[0113] Step S210: In heating mode, obtain the on / off state of the second throttling component;

[0114] Step S220: While keeping the switch state unchanged, obtain the reference outlet temperature of the outdoor heat exchanger within a preset time period, and determine the defrosting conditions based on the reference outlet temperature.

[0115] Step S230: Obtain the outdoor ambient temperature and the real-time outlet temperature of the outdoor heat exchanger;

[0116] Step S240: When the outdoor ambient temperature and the real-time outlet temperature meet the defrosting conditions, control the air conditioner to perform the defrosting operation.

[0117] In one embodiment, after the heating mode is activated, firstly, the present invention acquires the on / off state of the second throttling component. If it is determined that the second throttling component remains on or off, the reference outlet temperature of the outdoor heat exchanger within a preset time period is acquired, and the defrosting conditions are corrected based on the reference outlet temperature. Next, the present invention acquires the real-time outlet temperature of the outdoor heat exchanger and the outdoor ambient temperature, and determines whether the real-time outlet temperature of the outdoor heat exchanger and the outdoor ambient temperature meet the defrosting conditions. If the real-time outlet temperature of the outdoor heat exchanger and the outdoor ambient temperature meet the defrosting conditions, the present invention controls the air conditioner to defrost.

[0118] It is worth noting that for air conditioners with dual-stage enthalpy enhancement, after the second throttling component is activated, the low pressure at low temperatures increases, resulting in less frost accumulation and slower decay, allowing for longer continuous heating time. This significantly extends the defrosting cycle and improves the low-temperature heating effect. Furthermore, since the outlet temperature of the outdoor heat exchanger changes after the secondary heat exchanger is activated, this embodiment obtains the reference outlet temperature of the outdoor heat exchanger within a preset time period while maintaining the on / off state. This allows for flexible adjustment of the defrosting conditions, making them more aligned with the single-stage or dual-stage enthalpy enhancement operation of the air conditioner, leading to a more ideal defrosting time and improved low-temperature heating performance.

[0119] It should be noted that the aforementioned preset time period can be set arbitrarily, and the duration of the preset time period is not specifically limited in this application embodiment.

[0120] Additionally, it should be noted that the reference outlet temperature of the outdoor heat exchanger within the preset time period mentioned above can be the minimum outlet temperature of the outdoor heat exchanger within the preset time period, the second minimum outlet temperature of the outdoor heat exchanger within the preset time period, the median outlet temperature of the outdoor heat exchanger within the preset time period, or other temperatures. This application embodiment does not specifically limit this.

[0121] In one embodiment, obtaining the reference outlet temperature of the outdoor heat exchanger within a preset time period in step S220 can be specifically described as follows: after controlling the enthalpy-injecting compressor to run for a first preset time period, the minimum outlet temperature of the outdoor heat exchanger within the preset time period is obtained as the reference outlet temperature. Specifically, it will be more accurate to detect the minimum outlet temperature of the outdoor heat exchanger within the preset time period after the enthalpy-injecting compressor has run for the first preset time period and has stabilized.

[0122] In one embodiment, step S230 can be specifically described as follows: after controlling the air conditioner to continue running for a second preset period of time, the outdoor ambient temperature and the real-time outlet temperature of the outdoor heat exchanger are obtained. Specifically, after correcting the defrosting conditions, controlling the air conditioner to continue running for a second preset period of time, and then detecting the outdoor ambient temperature and the real-time outlet temperature of the outdoor heat exchanger after the air conditioner has stabilized will be more accurate.

[0123] It should be noted that the first preset duration and the second preset duration mentioned above can be preset, and the embodiments of this application do not specifically limit the values ​​of the first preset duration and the second preset duration.

[0124] Additionally, it should be noted that the aforementioned use of the minimum outlet temperature of the outdoor heat exchanger within a preset time period as a reference outlet temperature may include, but is not limited to, the following: Figure 3 and Figure 4 The two implementation scenarios are as follows:

[0125] like Figure 3 As shown, Figure 3 This is a flowchart of a defrosting control method for an air conditioner provided in another embodiment of this application. The process of obtaining the minimum outlet temperature of the outdoor heat exchanger within a preset time period as a reference outlet temperature may include, but is not limited to, steps S310 and S320.

[0126] Step S310: When the switch state of the second throttling component is closed;

[0127] Step S320: Use the first minimum outlet temperature of the outdoor heat exchanger within a preset time period as the reference outlet temperature.

[0128] In one embodiment, when the air conditioner is running in heating mode, if the second throttling component is in the off state, this embodiment of the application can record the first minimum outlet temperature of the outdoor heat exchanger within a preset time period after starting operation for a first preset duration, and use the first minimum outlet temperature as a reference outlet temperature.

[0129] like Figure 4 As shown, Figure 4 This is a flowchart of a defrosting control method for an air conditioner provided in another embodiment of this application. The process of obtaining the minimum outlet temperature of the outdoor heat exchanger within a preset time period as a reference outlet temperature may include, but is not limited to, steps S410 and S420.

[0130] Step S410: When the switch state of the second throttling component is in the on state;

[0131] Step S420: Use the second minimum outlet temperature of the outdoor heat exchanger within a preset time period as the reference outlet temperature.

[0132] In one embodiment, when the air conditioner is running in heating mode, if the second throttling component is in the on state, this embodiment of the application can record the second minimum outlet temperature of the outdoor heat exchanger within a preset time period after the first preset running time, and use the second minimum outlet temperature as the reference outlet temperature.

[0133] Alternatively, in one embodiment, if the switch state of the second throttling component changes from the off state to the on state during the operation of the air conditioner in heating mode, then this embodiment of the application can record the second minimum outlet temperature of the outdoor heat exchanger within a preset time period after the second throttling component is turned on, and use the second minimum outlet temperature as the reference outlet temperature.

[0134] In addition, such as Figure 5 As shown, Figure 5 This is a flowchart of a defrosting control method for an air conditioner provided in another embodiment of this application. The above step S240 may include, but is not limited to, steps S510 and S520.

[0135] Step S510: When the outdoor ambient temperature, real-time outlet temperature and the operating status of the air conditioner meet the first defrosting conditions;

[0136] Step S520: Continue running for the third preset time and then perform the defrosting operation; wherein, the first defrosting conditions include the following: the outdoor ambient temperature is greater than or equal to the first preset value, the real-time outlet temperature is less than the second preset value, the air conditioner is powered on for the first time or the standby time reaches the preset standby time.

[0137] In one embodiment, if the outdoor ambient temperature is greater than or equal to a first preset value, the real-time outlet temperature is less than a second preset value, and the air conditioner is powered on for the first time or the standby time reaches a preset standby time, then the air conditioner can be considered to meet the first defrosting conditions. At this time, after running for a third preset time, the defrosting operation is performed, and the overall heating comfort of the air conditioner is better and the heating performance is better.

[0138] It should be noted that the temperature values ​​of the first preset value and the second preset value mentioned above can be preset. This application embodiment does not specifically limit the temperature values ​​of the first preset value and the second preset value.

[0139] Additionally, it should be noted that the aforementioned third preset duration and preset standby duration can be preset, and the embodiments of this application do not specifically limit the values ​​of the third preset duration and preset standby duration.

[0140] In addition, such as Figure 6 As shown, Figure 6This is a flowchart of a defrosting control method for an air conditioner provided in another embodiment of this application. Regarding the above step S240, it may include, but is not limited to, steps S610 and S620.

[0141] Step S610: When the outdoor ambient temperature and the real-time outlet temperature do not meet the first defrosting condition but meet the second defrosting condition;

[0142] Step S620: Continue running for the fourth preset time and then perform the defrosting operation; wherein, the second defrosting conditions include the following: the outdoor ambient temperature is greater than or equal to the first preset value, and the real-time outlet temperature is less than the third preset value and less than or equal to the preset comparison value, wherein the third preset value is less than the second preset value, and the preset comparison value is greater than the reference outlet temperature.

[0143] In one embodiment, if the outdoor ambient temperature is greater than or equal to the first preset value and the real-time outlet temperature is less than the third preset value and less than or equal to the preset comparison value, then the air conditioner can be considered to meet the second defrosting condition. At this time, the outdoor ambient temperature and the real-time outlet temperature are also relatively low and are already on a certain downward trend, that is, on a rapid frosting trend. At this time, the defrosting operation can be performed after running for a fourth preset time.

[0144] It should be noted that the temperature values ​​of the aforementioned third preset value and preset comparison value can be preset, and the embodiments of this application do not specifically limit the temperature values ​​of the third preset value and preset comparison value.

[0145] In addition, it should be noted that the aforementioned fourth preset duration can be preset, and the embodiment of this application does not specifically limit the value of the fourth preset duration.

[0146] In addition, such as Figure 7 As shown, Figure 7 This is a flowchart of a defrosting control method for an air conditioner provided in another embodiment of this application. The above step S240 may include, but is not limited to, steps S710, S720 and S730.

[0147] Step S710: If the outdoor ambient temperature and the real-time outlet temperature do not meet the first defrosting condition and the second defrosting condition, but meet the third defrosting condition, continue running and determine whether the second defrosting condition is met.

[0148] Step S720: When the second defrosting condition is met, continue running for the fourth preset time and then perform the defrosting operation;

[0149] Step S730: When the second defrosting condition is not met, continue running for the fifth preset time and then perform the defrosting operation. The fifth preset time is less than the oil return cycle time. In addition, the third defrosting condition includes the following: the outdoor ambient temperature is greater than or equal to the first preset value, and the real-time outlet temperature is less than the first preset value but greater than the reference outlet temperature.

[0150] In one embodiment, if the outdoor ambient temperature is greater than or equal to a first preset value and the real-time outlet temperature is less than the first preset value but greater than the reference outlet temperature, then the air conditioner can be considered to currently meet the third defrosting condition, that is, although the outdoor ambient temperature and the real-time outlet temperature are low, they are still maintained. In other words, if the real-time outlet temperature does not decrease, this embodiment of the application can perform defrosting at a certain time point before a recycling cycle in order to maintain a reliable state, thereby ensuring the safety of oil return. If the second defrosting condition is met after continued operation, that is, it is in a trend of rapid frosting, then the defrosting operation can be performed after the fourth preset duration.

[0151] In addition, such as Figure 8 As shown, Figure 8 This is a flowchart of a defrosting control method for an air conditioner provided in another embodiment of this application. The above step S240 may include, but is not limited to, steps S810 and S820.

[0152] Step S810: When the outdoor ambient temperature and the real-time outlet temperature do not meet the first defrosting condition, the second defrosting condition, and the third defrosting condition, but meet the fourth defrosting condition;

[0153] Step S820: Continue running for the sixth preset time and then perform the defrosting operation; wherein, the fourth defrosting conditions include the following: the outdoor ambient temperature is less than the first preset value and the real-time outlet temperature is less than the preset comparison value.

[0154] In one embodiment, if the outdoor ambient temperature is lower than the first preset value and the real-time outlet temperature is lower than the preset comparison value, then the air conditioner can be considered to currently meet the fourth defrosting condition, that is, the outdoor ambient temperature and the real-time outlet temperature are both low, but there is no frost and no defrosting has occurred. In this embodiment, the defrosting operation will be performed after running for a longer period of time.

[0155] In addition, such as Figure 9 As shown, Figure 9 This is a flowchart of a defrosting control method for an air conditioner provided in another embodiment of this application. After performing the above step S220, the defrosting control method may also include, but is not limited to, steps S910 and S920.

[0156] Step S910: When the outdoor ambient temperature and the real-time outlet temperature do not meet the defrosting conditions;

[0157] Step S920: Continue running for the seventh preset time and then perform the defrosting operation, wherein the seventh preset time is less than the oil return cycle time.

[0158] In one embodiment, if the outdoor ambient temperature and the real-time outlet temperature do not meet the defrosting conditions, the present application embodiment will continue to run for a seventh preset time before performing the defrosting operation, that is, the present application embodiment will run for a longer time before performing the defrosting operation.

[0159] Based on the defrosting control methods for air conditioners described in the above embodiments, the following are overall embodiments of the defrosting control methods for air conditioners of this application.

[0160] like Figure 10 As shown, Figure 10 This is an overall flowchart of a defrosting control method for an air conditioner provided in one embodiment of this application; this solution is a defrosting control method proposed for a two-stage enthalpy-increasing system to improve heating performance, and the overall process includes, but is not limited to, the following steps:

[0161] First, the following parameters are explained in the embodiments of this application: T4 is the outdoor ambient temperature; T3 is the outlet temperature at the bottom of the outdoor heat exchanger; T3 MIN When the secondary enthalpy-increasing flow path is not open, T3 MIN For T3 MIN-1 When the secondary enthalpy-increasing flow path is opened, T3 MIN For T3 MIN-2 .

[0162] When the unit starts operating in heating mode, the system will record the minimum value of T3 for a preset time period X minutes after startup. MIN-1 (X can be set to 5-15 minutes, and the time period can be 5-8 minutes), and then determine whether the secondary enthalpy-increasing flow path (i.e., the second throttling component EEV2) is open (i.e. whether the second throttling component is open).

[0163] If applicable, record the minimum value of T3 for the preset time period (which can be the start time + 5 minutes) after the secondary enthalpy-increasing flow path is turned on. MIN-2 At this point, the minimum T3 value for defrosting determination changes to T3. MIN-2 .

[0164] If not, the minimum T3 value for defrosting determination remains T3. MIN-1 The value remains unchanged and is monitored until the next defrost. If the secondary enthalpy-increasing flow path is detected to be open, the minimum value of T3 is changed according to the opened secondary path. If no secondary enthalpy-increasing flow path is opened, the value remains unchanged.

[0165] When the unit's cumulative operating time reaches the threshold A (A: 30-40 minutes), the system begins to determine whether the defrosting conditions are met and whether to initiate defrosting.

[0166] (1) When defrosting condition 1 is met at the same time: the unit continues to run for a preset time (which can be 3 to 8 minutes) and then enters defrosting.

[0167] ①T4 ≥ preset value 1 (can be -10 to -15)

[0168] ②T3 value < preset value 2 (can be < -15);

[0169] ③ Upon initial power-on or after 3 minutes or more of standby time.

[0170] (2) When defrosting condition 1 is not met but defrosting condition 2 is met, continue running for the preset time (3 to 8 minutes) and then enter defrosting mode.

[0171] ①T4 ≥ preset value 1 (can be -10 to -15)

[0172] ② The T3 value is less than the preset value 3 (which can be -9 to -15), and the T3 value is less than or equal to T3. MIN +B (B can be 2 to 5);

[0173] (3) When defrosting conditions 1 and 2 are not met, but defrosting condition 3 is met, the system continues to run and continuously checks whether defrosting condition 2 is met. If it is met, the system continues to run for a preset time (which can be 3 to 8 minutes) and then enters the defrosting phase. If it is not met, the system continues to run for one oil return cycle time - 2 hours and then enters the defrosting phase. (That is, if the oil return time is 6 hours, then defrosting will occur after 4 hours.)

[0174] ①T4 ≥ preset value 1 (can be -10 to -15)

[0175] ② T3 value < preset value 1 (can be -15 to -20), but T3 value > T3 MIN +B (B can be 2 to 5);

[0176] (4) When defrosting conditions 1, 2 and 3 are not met, but defrosting condition 4 is met at the same time, continue running for a preset time (which can be 3 to 8 minutes) and then enter defrosting mode.

[0177] ①T4 < preset value 1;

[0178] ②T3 value < T3 MIN +B (B can be 2 to 5);

[0179] (5) If defrosting conditions 1 to 4 cannot be met simultaneously, the process continues for one oil return cycle time minus 0.5 hours before entering the defrosting phase. (That is, if the oil return time is assumed to be 6 hours, then defrosting will begin after 5.5 hours.)

[0180] Based on the above embodiments, the embodiments of this application have the following technical effects:

[0181] 1. There will be no frost-free defrosting issues. When the heating capacity decreases significantly, it will promptly begin defrosting. When the humidity is very low and there is virtually no heating capacity decrease, the defrosting time will be extended to the maximum extent possible while ensuring reliability. This will guarantee a continuous and stable heating effect and minimize fluctuations in the indoor air temperature.

[0182] 2. With dual-stage enthalpy control enabled, the T3 judgment value can be changed in a timely manner. Even if T3 changes in a short period of time, it will not enter the defrosting state due to fluctuations, ensuring the best judgment defrosting state, ensuring continuous and stable heating effect, and ensuring minimal fluctuations in indoor air temperature.

[0183] Based on the defrosting control method of the air conditioner in the above embodiments, the following presents various embodiments of the controller, air conditioner and computer-readable storage medium of this application.

[0184] like Figure 11 As shown, Figure 11 This is a schematic diagram of the structure of a controller for performing a defrosting control method for an air conditioner, according to an embodiment of this application. The controller 1200 implemented in this application includes: a processor 1210, a memory 1220, and a computer program stored in the memory 1220 and executable on the processor 1210, wherein... Figure 11 The example uses a processor 1210 and a memory 1220.

[0185] Processor 1210 and memory 1220 can be connected via a bus or other means. Figure 11 Taking the example of a connection between China and Israel via a bus.

[0186] Memory 1220, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory 1220 may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory 1220 may optionally include remotely located memories 1220 relative to processor 1210, which can be connected to controller 1200 via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0187] Those skilled in the art will understand that Figure 11 The device structure shown does not constitute a limitation on the controller 1200 and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0188] exist Figure 11In the controller 1200 shown, the processor 1210 can be used to call the defrosting control program stored in the memory 1220, thereby implementing the defrosting control method of the air conditioner described above. Specifically, the non-transitory software program and instructions required to implement the defrosting control method of the air conditioner in the above embodiment are stored in the memory 1220. When executed by the processor 1210, the defrosting control method of the air conditioner in the above embodiment is executed.

[0189] It is worth noting that since the controller 1200 of this application embodiment can execute the defrosting control method of the air conditioner in any of the above embodiments, the specific implementation method and technical effects of the controller 1200 of this application embodiment can refer to the specific implementation method and technical effects of the defrosting control method of the air conditioner in any of the above embodiments.

[0190] In addition, one embodiment of this application also provides an air conditioner that includes the controller described in the above embodiment.

[0191] It is worth noting that, since the air conditioner of this application embodiment includes the controller of the above embodiments, and the controller of the above embodiments can execute the defrosting control method of the air conditioner of any of the above embodiments, the specific implementation method and technical effect of the air conditioner of this application embodiment can refer to the specific implementation method and technical effect of the defrosting control method of the air conditioner of any of the above embodiments.

[0192] Furthermore, one embodiment of this application provides a computer-readable storage medium storing computer-executable instructions for performing the defrosting control method for an air conditioner described above. Exemplarily, the above-described method is executed... Figures 2 to 10 The methods and steps in the text.

[0193] It is worth noting that, since the computer-readable storage medium of this application embodiment can execute the defrosting control method of the air conditioner in any of the above embodiments, the specific implementation and technical effects of the computer-readable storage medium of this application embodiment can be referred to the specific implementation and technical effects of the defrosting control method of the air conditioner in any of the above embodiments.

[0194] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically include computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0195] The above provides a detailed description of the preferred embodiments of this application. However, this application is not limited to the above-described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A defrosting control method for an air conditioner, characterized in that, The air conditioner includes an enthalpy-spraying compressor, a primary heat exchanger, a secondary heat exchanger, a first throttling assembly for controlling the enthalpy-spraying circuit of the primary heat exchanger, and a second throttling assembly for controlling the suction circuit of the secondary heat exchanger. The method includes: In heating mode, obtain the on / off state of the second throttling component; With the switch state remaining unchanged, the reference outlet temperature of the outdoor heat exchanger within a preset time period is obtained, and the defrosting conditions are determined based on the reference outlet temperature. Obtain the outdoor ambient temperature and the real-time outlet temperature of the outdoor heat exchanger; When the outdoor ambient temperature and the real-time outlet temperature meet the defrosting conditions, the air conditioner is controlled to perform a defrosting operation.

2. The method according to claim 1, characterized in that, The process of obtaining the reference outlet temperature of the outdoor heat exchanger within a preset time period includes: After controlling the enthalpy compressor to run for a first preset time, the minimum outlet temperature of the outdoor heat exchanger within the preset time period is obtained as the reference outlet temperature.

3. The method according to claim 2, characterized in that, The step of obtaining the minimum outlet temperature of the outdoor heat exchanger within a preset time period as the reference outlet temperature includes one of the following: When the second throttling component is in the off state, the first minimum outlet temperature of the outdoor heat exchanger within a preset time period is used as the reference outlet temperature. When the second throttling component is in the on state, the second minimum outlet temperature of the outdoor heat exchanger within a preset time period is used as the reference outlet temperature.

4. The method according to claim 1, characterized in that, The acquisition of the outdoor ambient temperature and the real-time outlet temperature of the outdoor heat exchanger includes: After the air conditioner continues to run for a second preset period of time, the outdoor ambient temperature and the real-time outlet temperature of the outdoor heat exchanger are obtained.

5. The method according to claim 4, characterized in that, The step of controlling the air conditioner to perform a defrosting operation when the outdoor ambient temperature and the real-time outlet temperature meet the defrosting conditions includes: When the outdoor ambient temperature, the real-time outlet temperature and the operating status of the air conditioner meet the first defrosting conditions, the defrosting operation is performed after the third preset time. The first defrosting conditions include the following: The outdoor ambient temperature is greater than or equal to a first preset value; The real-time outlet temperature is less than the second preset value; The air conditioner is powered on for the first time or the standby time reaches the preset standby time.

6. The method according to claim 5, characterized in that, The step of controlling the air conditioner to perform a defrosting operation when the outdoor ambient temperature and the real-time outlet temperature meet the defrosting conditions further includes: If the outdoor ambient temperature and the real-time outlet temperature do not meet the first defrosting condition but meet the second defrosting condition, continue running for a fourth preset time and then perform the defrosting operation. The second defrosting conditions include the following: The outdoor ambient temperature is greater than or equal to the first preset value; The real-time outlet temperature is less than a third preset value and less than or equal to a preset comparison value, wherein the third preset value is less than the second preset value and the preset comparison value is greater than the reference outlet temperature.

7. The method according to claim 6, characterized in that, The step of controlling the air conditioner to perform a defrosting operation when the outdoor ambient temperature and the real-time outlet temperature meet the defrosting conditions further includes: If the outdoor ambient temperature and the real-time outlet temperature do not meet the first defrosting condition and the second defrosting condition, but meet the third defrosting condition, continue to operate and determine whether the second defrosting condition is met. When the second defrosting condition is met, continue running for the fourth preset time and then perform the defrosting operation. If the second defrosting condition is not met, the defrosting operation will be performed after the fifth preset time, wherein the fifth preset time is less than the oil return cycle time. The third defrosting condition includes the following: The outdoor ambient temperature is greater than or equal to the first preset value; The real-time outlet temperature is less than the first preset value but greater than the reference outlet temperature.

8. The method according to claim 7, characterized in that, The step of controlling the air conditioner to perform a defrosting operation when the outdoor ambient temperature and the real-time outlet temperature meet the defrosting conditions further includes: If the outdoor ambient temperature and the real-time outlet temperature do not meet the first defrosting condition, the second defrosting condition, and the third defrosting condition, but meet the fourth defrosting condition, the defrosting operation will be performed after running for a sixth preset time. The fourth defrosting condition includes the following: The outdoor ambient temperature is lower than the first preset value; The real-time outlet temperature is less than the preset comparison value.

9. The method according to any one of claims 1 to 8, characterized in that, After determining the defrosting conditions based on the reference outlet temperature, the method further includes: If the outdoor ambient temperature and the real-time outlet temperature do not meet the defrosting conditions, the defrosting operation will be performed after running for a seventh preset time, wherein the seventh preset time is less than the oil return cycle time.

10. A controller, characterized in that, include: The device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the defrosting control method for an air conditioner as described in any one of claims 1 to 9 when running the computer program.

11. An air conditioner, characterized in that, Includes the controller as described in claim 10.

12. A computer-readable storage medium, characterized in that: The device stores computer-executable instructions for performing the defrosting control method for an air conditioner as described in any one of claims 1 to 9.

Images