Control method of air conditioner, air conditioner and storage medium

Abstract

The invention discloses a control method of an air conditioner, the air conditioner and a storage medium. An outdoor unit of the air conditioner comprises an outdoor heat exchanger and an outdoor fan arranged corresponding to the outdoor heat exchanger, the outdoor heat exchanger comprises a first heat exchange module and a second heat exchange module, and the first heat exchange module and the second heat exchange module are arranged in the airflow direction corresponding to the outdoor fan. The method comprises the steps that the air conditioner is controlled to run in a heating mode, and running state parameters of the air conditioner are obtained; and when the operation state parameters meet the preset frosting condition of the outdoor unit, the outdoor fan is controlled to alternately operate in the first rotation direction and the second rotation direction. The invention aims to delay the frosting of the outdoor unit and improve the thermal comfort of indoor users.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a control method of an air conditioner, an air conditioner and a storage medium. Background Art

[0002] When the air conditioner is running in heating mode for a long time in a low temperature environment, the outdoor unit is prone to frost. Among them, the outdoor fan generally runs in a fixed direction. In harsh environments, the outdoor unit frosts very quickly, and the heat exchanger quickly reaches the defrost thickness that triggers the defrost operation, which causes the air conditioner to defrost frequently, affecting the comfort of indoor users. Summary of the invention

[0003] The main purpose of the present invention is to provide a control method of an air conditioner, an air conditioner and a storage medium, aiming to delay frosting of an outdoor unit and improve the thermal comfort of indoor users.

[0004] To achieve the above object, the present invention provides a control method for an air conditioner, wherein an outdoor unit of the air conditioner comprises an outdoor heat exchanger and an outdoor fan arranged corresponding to the outdoor heat exchanger, wherein the outdoor heat exchanger comprises a first heat exchange module and a second heat exchange module arranged along an air flow direction of the outdoor fan, and the control method for the air conditioner comprises the following steps:

[0005] Controlling the air conditioner to operate in a heating mode and obtaining operating state parameters of the air conditioner;

[0006] When the operating state parameter meets the preset frosting condition of the outdoor unit, the outdoor fan is controlled to operate alternately in the first direction and the second direction.

[0007] Optionally, the step of controlling the outdoor fan to alternately operate in a first direction and a second direction comprises:

[0008] Controlling the outdoor fan to cyclically execute operation at a first direction for a first time, stopping, operation at a second direction for a second time, and stopping;

[0009] The airflow direction corresponding to the first turn is to pass through the first heat exchange module and the second heat exchange module in sequence, and the airflow direction corresponding to the second turn is to pass through the second heat exchange module and the first heat exchange module in sequence.

[0010] Optionally, the air conditioner control method further includes:

[0011] When the outdoor fan is running at a first direction, obtaining a first temperature difference between the first heat exchange module and the second heat exchange module;

[0012] The second duration is determined according to the first temperature difference value.

[0013] Optionally, the air conditioner control method further includes:

[0014] When the outdoor fan is running at the second direction, obtaining a second temperature difference between the first heat exchange module and the second heat exchange module;

[0015] The first duration is determined according to the second temperature difference value.

[0016] Optionally, the air conditioner control method further includes:

[0017] When the outdoor fan is running in the first direction or the second direction, obtaining a first temperature of the first heat exchange module and a second temperature of the second heat exchange module;

[0018] determining a target speed of the outdoor fan according to the first temperature and the second temperature;

[0019] The outdoor fan is controlled to operate at the target speed.

[0020] Optionally, the step of determining the target speed of the outdoor fan according to the first temperature and the second temperature includes:

[0021] When the outdoor fan is running at the first direction, a first reference speed is determined according to the first temperature, and a first speed correction value is determined according to a relationship between the first temperature and the second temperature;

[0022] The first reference speed is corrected according to the first speed correction value to obtain the target speed.

[0023] Optionally, the step of determining the target speed of the outdoor fan according to the first temperature and the second temperature includes:

[0024] When the outdoor fan is running at the second direction, a second reference speed is determined according to the second temperature, and a second speed correction value is determined according to a relationship between the first temperature and the second temperature;

[0025] The second reference speed is corrected according to the second speed correction value to obtain the target speed.

[0026] Optionally, the air conditioner further includes an indoor heat exchanger, and after the step of controlling the outdoor fan to alternately operate in the first direction and the second direction when the operating state parameter meets the preset frosting condition of the outdoor unit, the step further includes:

[0027] Acquiring a third temperature of the indoor heat exchanger;

[0028] When the third temperature is greater than the preset temperature, the outdoor fan is controlled to maintain the first direction of operation, and the air flow direction corresponding to the first direction of operation is to pass through the fan, the first heat exchange module and the second heat exchange module in sequence;

[0029] When the third temperature is less than or equal to the preset temperature, the process returns to the step of controlling the outdoor fan to alternately operate in the first direction and the second direction.

[0030] Optionally, the operating status parameters include an outdoor ambient temperature and a temperature change value of the outdoor heat exchanger, and the preset frosting condition includes that the outdoor ambient temperature is lower than a preset ambient temperature and the temperature change value is higher than a preset threshold.

[0031] In addition, in order to achieve the above-mentioned purpose, the present application also proposes an air conditioner, the air conditioner comprising a control device and an outdoor unit, the outdoor unit comprising an outdoor heat exchanger and an outdoor fan arranged corresponding to the outdoor heat exchanger, the outdoor heat exchanger comprising a first heat exchange module and a second heat exchange module arranged along the airflow direction of the outdoor fan;

[0032] The outdoor fan is connected to the control device, which includes: a memory, a processor, and an air conditioner control program stored in the memory and executable on the processor. When the air conditioner control program is executed by the processor, the steps of the air conditioner control method as described in any one of the above items are implemented.

[0033] In addition, in order to achieve the above-mentioned purpose, the present application also proposes a storage medium, on which a control program of an air conditioner is stored. When the control program of the air conditioner is executed by a processor, the steps of the control method of the air conditioner as described in any of the above items are implemented.

[0034] The present invention proposes a control method for an air conditioner, in which an outdoor heat exchanger of the air conditioner is provided with a first heat exchange module and a second heat exchange module along the air flow direction of an outdoor fan. When the operating state parameters of the air conditioner meet the preset frosting conditions of the outdoor unit during the heating mode operation, the method controls the first reversal and the second reversal of the outdoor fan to operate alternately, so that the first heat exchange module and the second heat exchange module can alternately serve as the windward side, and frost can also form on the second heat exchange module in addition to the first heat exchange module, and the time required to achieve the same frost layer thickness is effectively increased, thereby delaying the frosting of the outdoor unit, reducing the number of defrosting operations during the heating process of the air conditioner, effectively avoiding indoor temperature fluctuations during the defrosting process, and improving the thermal comfort of indoor users. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of the structure of a refrigerant system of an air conditioner according to an embodiment of the present invention;

[0036] Figure 2 A schematic diagram of the hardware structure involved in the operation of an air conditioner according to an embodiment of the present invention;

[0037] Figure 3 A schematic diagram of a flow chart of an embodiment of a method for controlling an air conditioner according to the present invention;

[0038] Figure 4 A flow chart of another embodiment of a method for controlling an air conditioner according to the present invention;

[0039] Figure 5 A flow chart of another embodiment of a method for controlling an air conditioner according to the present invention;

[0040] Figure 6 The figure is a flow chart of another embodiment of the air conditioner control method of the present invention.

[0041] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0042] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0043] The embodiment of the present invention provides an air conditioner, which may include a wall-mounted air conditioner, a cabinet air conditioner, a window air conditioner, a ceiling air conditioner, etc.

[0044] In the embodiment of the present invention, refer to Figure 1 and Figure 2 The air conditioner includes a control device 100, a compressor 200, an indoor heat exchanger 300, a throttling device 400 and an outdoor unit, wherein the outdoor unit includes an outdoor heat exchanger 500 and an outdoor fan 600 corresponding to the outdoor heat exchanger 500, wherein the outdoor heat exchanger 500 includes a first heat exchange module 501 and a second heat exchange module 502 arranged along the air flow direction of the outdoor fan 600. The compressor 200, the throttling device 400 and the outdoor fan 600 are all connected to the control device 100.

[0045] In one implementation, at least a portion of the first heat exchange module 501 and at least a portion of the second heat exchange module 502 are connected in parallel, and the refrigerant flowing into the outdoor heat exchanger flows into at least a portion of the second heat exchange module 501 and at least a portion of the second heat exchange module 502 respectively.

[0046] In another implementation, at least a portion of the first heat exchange module 501 and at least a portion of the second heat exchange module 502 are connected in series. When the air conditioner operates in heating mode, the refrigerant flowing into the outdoor heat exchanger flows into at least a portion of the second heat exchange module 502 and at least a portion of the first heat exchange module 501 in sequence.

[0047] In one implementation, referring to Figure 1 The air conditioner further includes a reversing assembly 700. The exhaust port of the compressor 200, the return air port of the compressor 200, the indoor heat exchanger 300, and the outdoor heat exchanger 500 are all connected to the reversing assembly 700. The reversing assembly 700 has a first operating state and a second operating state. When the reversing assembly 700 operates in the first operating state, the exhaust port of the compressor 200 is connected to the outdoor heat exchanger 500, and the return air port of the compressor 200 is connected to the indoor heat exchanger 300. The refrigerant discharged from the compressor 200 flows through the outdoor heat exchanger 500, the throttling device 400, and the indoor heat exchanger 300 in sequence and then flows back to the compressor 200. The indoor heat exchanger 300 is in an evaporating state, and the outdoor heat exchanger 500 is in a condensing state. The air conditioner The operation mode is cooling mode or defrosting mode; when the reversing component 700 operates in the second operation state, the exhaust port of the compressor 200 is connected to the indoor heat exchanger 300, and the return air port of the compressor 200 is connected to the outdoor heat exchanger 500. The refrigerant discharged from the compressor 200 flows through the indoor heat exchanger 300, the throttling device 400 and the outdoor heat exchanger 500 in sequence and then flows back to the compressor 200. The indoor heat exchanger 300 is in a condensing state, and the outdoor heat exchanger 500 is in an evaporating state. The operation mode of the air conditioner is heating mode.

[0048] In another implementation, the exhaust port of the compressor 200, the indoor heat exchanger 300, the throttling device 400, the outdoor heat exchanger 500 and the return air port of the compressor 200 are sequentially connected. The refrigerant discharged from the compressor 200 flows through the indoor heat exchanger 300, the throttling device 400 and the outdoor heat exchanger 500 in sequence and then flows back to the compressor 200. The indoor heat exchanger 300 is in a condensing state, the outdoor heat exchanger 500 is in an evaporating state, and the operation mode of the air conditioner is a heating mode.

[0049] Further, the air conditioner also includes a temperature detection module 01, and the temperature detection module 01 is connected to the control device 100. The temperature detection module 01 is arranged in the outdoor heat exchanger 500 to detect the temperature data of the outdoor heat exchanger 500. In one implementation, the temperature detection module 01 is arranged in the gap between the first heat exchange module and the second heat exchange module. In another implementation, the temperature detection module 01 includes a first temperature sensor and a second temperature sensor, the first temperature sensor is arranged in the first heat exchange module, and the second temperature sensor is arranged in the second heat exchange module.

[0050] Furthermore, the air conditioner further comprises an environment detection module 02, and the environment detection module 02 is connected to the control device 100. The environment detection module 02 is arranged in an outdoor environment to detect outdoor environment temperature data.

[0051] Furthermore, the air conditioner further comprises a temperature sensor 03 , which is connected to the control device 100 . The temperature sensor 03 is disposed in the indoor heat exchanger 300 to detect temperature data of the indoor heat exchanger 300 .

[0052] In the embodiment of the present invention, refer to Figure 2 The control device 100 of the air conditioner includes: a processor 1001, such as a CPU, a memory 1002, and a timer 1003. Among them, these components are connected and communicated through a communication bus. The memory 1002 can be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1002 can also be a storage device independent of the aforementioned processor 1001.

[0053] Those skilled in the art will understand that Figure 2 The device structure shown in the figure does not constitute a limitation of the device, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0054] like Figure 2 As shown, the memory 1002 as a computer storage medium may include a control program for the air conditioner.

[0055] exist Figure 2 In the device shown, the processor 1001 can be used to call the air conditioner control program stored in the memory 1002 and execute the relevant steps of the air conditioner control method in the following embodiments.

[0056] The embodiment of the present invention further provides a control method of an air conditioner, which is applied to the above-mentioned air conditioner.

[0057] Reference Figure 3 , an embodiment of a control method of an air conditioner of the present application is proposed. In this embodiment, the control method of the air conditioner includes:

[0058] Step S10, controlling the air conditioner to operate in a heating mode, and obtaining operating state parameters of the air conditioner;

[0059] In the heating mode, the indoor heat exchanger is in a condensing state, and the outdoor heat exchanger is in an evaporating state. When the air conditioner enters the heating mode, the outdoor fan is turned on in the second reversing mode. Driven by the outdoor fan, the outdoor air passes through the second heat exchange module, the first heat exchange module and the outdoor fan in sequence and is blown out of the room. At this time, the outdoor fan is in a forward rotation state.

[0060] The operating status parameters may include environmental status parameters of the environment where the air conditioner is located and / or status parameters of the outdoor unit.

[0061] Step S20: When the operating state parameter satisfies the preset frosting condition of the outdoor unit, the outdoor fan is controlled to operate alternately in a first direction and a second direction.

[0062] The preset frosting condition specifically refers to the range of values ​​that the operating state parameters of the outdoor unit need to reach when frosting occurs, or the size relationship or quantity relationship between the parameters and the preset parameters.

[0063] In this embodiment, the operating state parameters include the outdoor ambient temperature and the temperature change value of the outdoor heat exchanger, and the preset frosting condition includes that the outdoor ambient temperature is less than the preset ambient temperature and the temperature change value is greater than a preset threshold.

[0064] The airflow direction corresponding to the first turn is to pass through the outdoor fan, the first heat exchange module and the second heat exchange module in sequence, and the outdoor fan is in a reverse state when the outdoor fan is running in the first turn. The airflow direction corresponding to the second turn is to pass through the second heat exchange module, the first heat exchange module and the outdoor fan in sequence, and the outdoor fan is in a forward state when the outdoor fan is running in the second turn.

[0065] The duration of the outdoor fan running in the first direction is defined as the first duration, and the duration of the outdoor fan running in the second direction is defined as the second duration. The first duration and the second duration may be preset fixed durations, such as 30s, 40s, or 60s, or the first duration and the second duration may also be durations determined according to the actual conditions of the air conditioner. The first duration and the second duration may be equal durations, or different durations.

[0066] The speed of the outdoor fan when running at the first direction is defined as the first speed, the speed of the outdoor fan when running at the first direction is defined as the first speed, and the speed of the outdoor fan when running at the second direction is defined as the second speed. The first speed and the second speed may be preset fixed speeds, or the first speed and the second speed may also be speeds determined according to the actual conditions of the air conditioner, for example, the first speed and the second speed may be determined according to the current temperature of the outdoor heat exchanger. The first speed and the second speed may be equal speeds, or they may be different speeds.

[0067] When the operating state parameter does not meet the preset frosting condition, the outdoor fan is controlled to maintain the second direction of operation.

[0068] A control method for an air conditioner is proposed in an embodiment of the present invention. An outdoor heat exchanger of the air conditioner is provided with a first heat exchange module and a second heat exchange module along the air flow direction of an outdoor fan. When the operating state parameters of the air conditioner meet the preset frosting conditions of the outdoor unit during the heating mode operation of the air conditioner, the method controls the first reversal and the second reversal of the outdoor fan to operate alternately, so that the first heat exchange module and the second heat exchange module can alternately serve as the windward side. In addition to frost on the first heat exchange module, frost can also be formed on the second heat exchange module, and the time required to achieve the same frost layer thickness is effectively increased, thereby delaying the frosting of the outdoor unit, reducing the number of defrosting operations during the heating process of the air conditioner, effectively avoiding indoor temperature fluctuations during the defrosting process, and improving the thermal comfort of indoor users.

[0069] Further, based on the above embodiment, another embodiment of the control method of the air conditioner of the present application is proposed. In this embodiment, referring to Figure 4 The step of controlling the outdoor fan to alternately operate in a first direction and a second direction comprises:

[0070] Step S21, controlling the outdoor fan to cyclically execute operation at a first direction for a first duration, stopping, operation at a second direction for a second duration, and stopping;

[0071] Among them, the air flow direction corresponding to the first turn is to pass through the outdoor fan, the first heat exchange module and the second heat exchange module in sequence, and the air flow direction corresponding to the second turn is to pass through the second heat exchange module, the first heat exchange module and the outdoor fan in sequence.

[0072] In this embodiment, the first duration is greater than or equal to the second duration.

[0073] The first duration and the second duration here may be preset fixed durations, or may be durations determined according to actual operating state parameters of the air conditioner.

[0074] In this embodiment, since the wind resistance of the outdoor fan during reverse rotation is greater than that during forward rotation, the forward rotation time of the outdoor fan during alternating forward and reverse rotation is shorter and the reverse rotation time is longer, which is beneficial to improving the uniformity of frosting of the first heat exchange module and the second heat exchange module.

[0075] Furthermore, when the air conditioner is operating in heating mode, the refrigerant flowing into the outdoor heat exchanger flows into the second heat exchange module and the first heat exchange module in turn, and the refrigerant temperature in the second heat exchange module is lower than the refrigerant temperature in the first heat exchange module, and the second time duration is shorter than the first time duration, which is beneficial to improving the uniformity of frosting of the first heat exchange module and the second heat exchange module, and ensuring that defrosting is not started until the frost on the first heat exchange module and the second heat exchange module is thick, thereby further delaying the frosting of the outdoor heat exchanger, reducing the number of defrost operations, and improving indoor heating comfort.

[0076] Furthermore, in this embodiment, the control method of the air conditioner also includes: when the outdoor fan operates at a first direction, obtaining a first temperature difference between the first heat exchange module and the second heat exchange module; and determining the second time length according to the first temperature difference.

[0077] During the operation of the outdoor fan at the first direction, a first temperature value detected by the first temperature sensor and a second temperature value detected by the second temperature sensor are obtained, and an absolute value of the difference between the first temperature value and the second temperature value is determined as a first temperature difference value.

[0078] The duration correction value is determined according to the first temperature difference value, and different first temperature difference values ​​correspond to different duration correction values. The duration correction value is positively correlated with the first temperature difference value. Specifically, the duration correction value can be calculated by substituting the first temperature difference value into a preset formula, or the numerical interval in which the first temperature difference value is located can be determined, and the duration correction value can be determined based on the numerical interval, and so on. The second duration is obtained by subtracting the first duration from the duration correction value.

[0079] In addition, a plurality of preset temperature intervals may be pre-divided, each preset temperature interval is associated with a corresponding preset time length, the preset temperature interval where the first temperature difference value is located is determined, and the preset time length associated with the preset temperature interval is used as the second time length.

[0080] In this embodiment, the outdoor fan is adapted to dynamically adjust the second duration of operation in the second steering direction based on the temperature difference between the first heat exchange module and the second heat exchange module during the first steering operation, which is beneficial to further improve the uniformity of frosting of the first heat exchange module and the second heat exchange module, thereby effectively further delaying frosting of the outdoor heat exchanger to further improve indoor heating comfort.

[0081] Furthermore, in this embodiment, the control method of the air conditioner also includes: when the outdoor fan operates in the second direction, obtaining a second temperature difference between the first heat exchange module and the second heat exchange module; and determining the first time length according to the second temperature difference.

[0082] When the outdoor fan is running in the second direction, a third temperature value detected by the first temperature sensor and a fourth temperature value detected by the second temperature sensor are obtained, and an absolute value of a difference between the third temperature value and the fourth temperature value is determined as a second temperature difference value.

[0083] The duration correction value is determined according to the second temperature difference value, and different second temperature difference values ​​correspond to different duration correction values. The duration correction value is positively correlated with the second temperature difference value. Specifically, the duration correction value can be calculated by substituting the second temperature difference value into a preset formula, or the numerical interval in which the second temperature difference value is located can be determined, and the duration correction value can be determined based on the numerical interval, and so on. The new first duration is obtained by increasing the second duration by the duration correction value.

[0084] In addition, a plurality of preset temperature intervals may be pre-divided, each preset temperature interval is associated with a corresponding preset time length, the preset temperature interval where the second temperature difference value is located is determined, and the preset time length associated with the preset temperature interval is used as the first time length.

[0085] In this embodiment, the outdoor fan is adapted to dynamically adjust the second duration of operation in the first steering direction based on the temperature difference between the first heat exchange module and the second heat exchange module during the second steering operation, which is beneficial to further improve the uniformity of frosting of the first heat exchange module and the second heat exchange module, thereby effectively further delaying frosting of the outdoor heat exchanger to further improve indoor heating comfort.

[0086] Further, based on any of the above embodiments, another embodiment of the control method of the air conditioner of the present application is proposed. Figure 5 , the control method of the air conditioner further includes:

[0087] Step S201, obtaining a first temperature of the first heat exchange module and a second temperature of the second heat exchange module during the operation of the outdoor fan in the first direction or the second direction;

[0088] Step S202, determining a target speed of the outdoor fan according to the first temperature and the second temperature;

[0089] Different first temperatures and different second temperatures correspond to different target speeds. A preset correspondence between the first temperature, the second temperature and the target speed may be preset, and the preset correspondence may include a calculation formula, a mapping table, etc. The preset correspondence corresponding to the first turn and the preset correspondence corresponding to the second turn may be the same or different.

[0090] In one implementation, the target rotation speed may be determined according to the lowest temperature between the first temperature and the second temperature, and the target rotation speed is negatively correlated with the lowest temperature.

[0091] In another implementation, the target rotation speed may also be calculated according to the first temperature and the second temperature.

[0092] Step S203, controlling the outdoor fan to operate at the target speed.

[0093] In this embodiment, the target speed of the outdoor fan is determined by combining the temperatures of the first temperature module and the second temperature module, which is beneficial to ensure that the heat exchange efficiency of the outdoor heat exchanger can match its frosting state, thereby helping to further delay frosting and improve indoor comfort.

[0094] In other embodiments, when the temperature detection module of the outdoor heat exchanger is arranged in the gap between the first heat exchange module and the second heat exchange module, the target speed of the outdoor fan can also be determined according to the temperature detected by the temperature detection module when the outdoor fan is operating in the first direction or the second direction.

[0095] Furthermore, in the present embodiment, the step of determining the target speed of the outdoor fan according to the first temperature and the second temperature includes: when the outdoor fan is operating at the first direction, determining a first reference speed according to the first temperature, and determining a first speed correction value according to the relationship between the first temperature and the second temperature; and correcting the first reference speed according to the first speed correction value to obtain the target speed.

[0096] The relationship value may include a difference or a ratio. The first reference speed is negatively correlated with the first temperature, that is, the lower the first temperature, the higher the first reference speed. The first speed correction value may include a speed correction amplitude or a speed correction coefficient.

[0097] The first reference speed can be increased or decreased according to the first speed correction value to obtain the target speed.

[0098] In this embodiment, by setting the target speed of the outdoor fan when operating in the first direction in the above manner, the heat exchange efficiency of the outdoor heat exchanger can be further improved to match the frosting state thereof, thereby further delaying frosting and improving indoor comfort.

[0099] Furthermore, in this embodiment, the step of determining the target speed of the outdoor fan according to the first temperature and the second temperature includes: when the outdoor fan is operated at the second direction, determining a second reference speed according to the second temperature, and determining a second speed correction value according to the relationship between the first temperature and the second temperature; and correcting the second reference speed according to the second speed correction value to obtain the target speed.

[0100] The relationship value may include a difference or a ratio. The second reference speed is negatively correlated with the second temperature, that is,

[0101] The lower the second temperature, the higher the second reference speed. The second speed correction value may include a speed correction amplitude or a speed correction coefficient.

[0102] The second reference speed can be increased or decreased according to the second speed correction value to obtain the target speed here.

[0103] In this embodiment, by setting the target speed of the outdoor fan when operating in the second direction in the above manner, the heat exchange efficiency of the outdoor heat exchanger can be further improved to match the frosting state thereof, thereby further delaying frosting and improving indoor comfort.

[0104] Further, based on any of the above embodiments, another embodiment of the control method of the air conditioner of the present application is proposed. Figure 6 The air conditioner further includes an indoor heat exchanger, and after step S20, further includes:

[0105] Step S30, obtaining a third temperature of the indoor heat exchanger;

[0106] The third temperature can be specifically detected by the temperature sensor disposed in the indoor heat exchanger.

[0107] Step S40, when the third temperature is greater than a preset temperature, controlling the outdoor fan to maintain the second direction of operation, wherein the second direction of operation corresponds to an airflow direction of sequentially passing through the second heat exchange module, the first heat exchange module, and the outdoor fan;

[0108] The outdoor fan is in forward rotation state when operating in the second direction.

[0109] Step S50: when the third temperature is less than or equal to the preset temperature, return to step S10: control the outdoor fan to operate alternately with the first direction and the second direction.

[0110] In this embodiment, when the temperature of the indoor heat exchanger is high enough, it indicates that the heating effect of the air conditioner is good, the temperature of the refrigerant flowing into the outdoor heat exchanger is relatively high, and the probability of frosting and deterioration of the outdoor heat exchanger is low. At this time, the outdoor fan maintains forward rotation to delay frosting and improve the stability of system operation. When the temperature of the indoor heat exchanger is low, it indicates that the heating effect of the air conditioner is not good, the temperature of the refrigerant flowing into the outdoor heat exchanger is relatively low, and the frosting deterioration trend is serious. At this time, the outdoor fan continues to delay defrosting by alternating forward and reverse rotation, which is conducive to prolonging the time of entering defrosting operation, so as to effectively improve the indoor heating comfort.

[0111] Furthermore, after step S40, it can be determined whether the air conditioner meets the end condition of delayed defrosting. If so, the air conditioner operates in normal heating mode; if not, the process returns to step S10.

[0112] In addition, an embodiment of the present invention further proposes a storage medium, on which a control program for an air conditioner is stored. When the control program for the air conditioner is executed by a processor, the relevant steps of any embodiment of the control method for the air conditioner are implemented.

[0113] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0114] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0115] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present invention.

[0116] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for controlling an air conditioner, characterized in that: The outdoor unit of the air conditioner includes an outdoor heat exchanger and an outdoor fan arranged corresponding to the outdoor heat exchanger, the outdoor heat exchanger includes a first heat exchange module and a second heat exchange module arranged along the air flow direction of the outdoor fan, and the control method of the air conditioner includes the following steps: Controlling the air conditioner to operate in a heating mode and obtaining operating state parameters of the air conditioner; When the operating state parameter meets the preset frosting condition of the outdoor unit, the outdoor fan is controlled to operate alternately in the first direction and the second direction.

2. The air conditioner control method according to claim 1, characterized in that: The step of controlling the outdoor fan to alternately operate in a first direction and a second direction comprises: Controlling the outdoor fan to cyclically execute operation at a first direction for a first time, stopping, operation at a second direction for a second time, and stopping; The airflow direction corresponding to the first turn is to pass through the first heat exchange module and the second heat exchange module in sequence, and the airflow direction corresponding to the second turn is to pass through the second heat exchange module and the first heat exchange module in sequence.

3. The air conditioner control method according to claim 2, characterized in that: The control method of the air conditioner also includes: When the outdoor fan is running at a first direction, obtaining a first temperature difference between the first heat exchange module and the second heat exchange module; The second duration is determined according to the first temperature difference value.

4. The air conditioner control method according to claim 2, characterized in that: The control method of the air conditioner also includes: When the outdoor fan is running at the second direction, obtaining a second temperature difference between the first heat exchange module and the second heat exchange module; The first duration is determined according to the second temperature difference value.

5. The air conditioner control method according to claim 1, characterized in that: The control method of the air conditioner also includes: When the outdoor fan is running in the first direction or the second direction, obtaining a first temperature of the first heat exchange module and a second temperature of the second heat exchange module; determining a target speed of the outdoor fan according to the first temperature and the second temperature; The outdoor fan is controlled to operate at the target speed.

6. The control method of the air conditioner according to claim 5, characterized in that: The step of determining the target speed of the outdoor fan according to the first temperature and the second temperature comprises: When the outdoor fan is running at the first direction, a first reference speed is determined according to the first temperature, and a first speed correction value is determined according to a relationship between the first temperature and the second temperature; The first reference speed is corrected according to the first speed correction value to obtain the target speed.

7. The air conditioner control method according to claim 5, characterized in that: The step of determining the target speed of the outdoor fan according to the first temperature and the second temperature comprises: When the outdoor fan is running at the second direction, a second reference speed is determined according to the second temperature, and a second speed correction value is determined according to a relationship between the first temperature and the second temperature; The second reference speed is corrected according to the second speed correction value to obtain the target speed.

8. The method for controlling an air conditioner according to any one of claims 1 to 7, characterized in that: The air conditioner further comprises an indoor heat exchanger, and after the step of controlling the outdoor fan to alternately operate in a first direction and a second direction when the operating state parameter meets the preset frosting condition of the outdoor unit, the step further comprises: Acquiring a third temperature of the indoor heat exchanger; When the third temperature is greater than the preset temperature, the outdoor fan is controlled to maintain the first direction of operation, and the air flow direction corresponding to the first direction of operation is to pass through the fan, the first heat exchange module and the second heat exchange module in sequence; When the third temperature is less than or equal to the preset temperature, the process returns to the step of controlling the outdoor fan to alternately operate in the first direction and the second direction.

9. The method for controlling an air conditioner according to any one of claims 1 to 7, characterized in that: The operating state parameters include the outdoor ambient temperature and the temperature change value of the outdoor heat exchanger, and the preset frosting condition includes that the outdoor ambient temperature is less than the preset ambient temperature and the temperature change value is greater than a preset threshold.

10. An air conditioner, characterized in that: The air conditioner comprises a control device and an outdoor unit, the outdoor unit comprises an outdoor heat exchanger and an outdoor fan arranged corresponding to the outdoor heat exchanger, the outdoor heat exchanger comprises a first heat exchange module and a second heat exchange module arranged along the air flow direction of the outdoor fan; The outdoor fan is connected to the control device, which includes: a memory, a processor, and a control program for the air conditioner stored in the memory and executable on the processor, wherein the control program for the air conditioner implements the steps of the control method for the air conditioner as described in any one of claims 1 to 9 when executed by the processor.

11. A storage medium, characterized in that: The storage medium stores a control program of the air conditioner, and when the control program of the air conditioner is executed by the processor, the steps of the control method of the air conditioner as described in any one of claims 1 to 9 are implemented.

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