Air conditioner and dust removal control method thereof

Abstract

The invention relates to an air conditioner and a dust removal control method thereof, and relates to the technical field of air conditioners. The air conditioner comprises an indoor unit, wherein an indoor heat exchanger and an indoor fan are arranged in the indoor unit; an outdoor heat exchanger, an outdoor fan, a compressor, a throttling assembly and a four-way valve are arranged in the outdoor unit, and the compressor, the throttling assembly, the four-way valve, the outdoor heat exchanger and the indoor heat exchanger are connected through pipelines to form a refrigerant circulation loop; the controller is configured to obtain a temperature regulation starting instruction and control the outdoor fan to rotate reversely and the compressor to operate in response to the temperature regulation starting instruction; before the first platform operation cycle of the compressor is finished, the outdoor fan is controlled to stop operating, and after the outdoor fan completely stops operating, the outdoor fan is controlled to rotate in the forward direction, so that the blocking risk of the outdoor heat exchanger can be reduced, the system pressure can be reduced, and the influence on normal operation of the air conditioner in the attachment removing process can be reduced; and the loss of the outdoor fan is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, and particularly to an air conditioner and its dust removal control method. Background Art

[0002] The outdoor unit of a split air conditioner is installed on the outdoor side. To improve the heat exchange capacity, its operating air volume is relatively large. In addition, the split outdoor heat exchanger generally uses a fin-tube heat exchanger with a small fin pitch, which makes it easy to adsorb dust. Especially during the season when catkins and poplar floss are flying in spring in the north, when the air conditioner is running, it is easy to adsorb the flying floss in the air on the surface of the outdoor heat exchanger, blocking the fins of the outdoor heat exchanger, resulting in poor heat exchange. In severe cases, it may even cause the unit to trip. In addition, in some areas with heavy sand and dust, a large amount of sand and dust will also accumulate on the surface of the outdoor heat exchanger, reducing the heat exchange efficiency of the outdoor heat exchanger and affecting the overall operating performance of the unit.

[0003] In the traditional technology, during the operation of the air conditioner, when the cumulative operation duration meets the preset duration condition, the dust removal mode is entered. After entering the dust removal mode, the compressor is first controlled to stop running and the fan is stopped, and then the fan is controlled to reverse for dust removal. After the dust removal is completed, the unit is shut down or operates normally.

[0004] Although the above method can blow away some attachments adhering to the outdoor heat exchanger, the dust removal process will affect the normal operation of the air conditioner and the user experience. In areas with large sand and dust or where there is a large amount of floss and the cumulative operation duration of the air conditioner is not enough, there is also a situation where some attachments are adsorbed deeper and deeper into the fin gaps, blocking the outdoor heat exchanger and affecting the heat exchange efficiency of the outdoor heat exchanger. Summary of the Invention

[0005] The present application provides an air conditioner and its dust removal control method to reduce the risk of blockage of attachments in the outdoor heat exchanger without affecting the normal operation of the air conditioner.

[0006] In a first aspect, in some embodiments, an air conditioner is provided, including:

[0007] An indoor unit, which is provided with an indoor heat exchanger and an indoor fan;

[0008] An outdoor unit, which is provided with an outdoor heat exchanger, an outdoor fan, a compressor, a throttling component, and a four-way valve. The compressor, the throttling component, the four-way valve, the outdoor heat exchanger, and the indoor heat exchanger are connected through pipelines to form a refrigerant circulation loop;

[0009] A controller, configured to:

[0010] Obtain a temperature adjustment startup instruction, and in response to the temperature adjustment startup instruction, control the outdoor fan to rotate in the reverse direction and the compressor to operate; before the end of the first platform operation cycle of the compressor, control the outdoor fan to stop operating, and after the outdoor fan has completely stopped operating, control the outdoor fan to rotate in the forward direction.

[0011] In some embodiments, the controller directly controls the outdoor fan to rotate in the reverse direction in response to the temperature adjustment startup instruction, so that large particle dust, flying floc substances and other attachments attached to the outdoor heat exchanger of the outdoor unit can be blown away in time at startup, avoiding the above attachments being gradually adsorbed deeper into the fin gaps during the operation of the air conditioner, which affects the heat exchange efficiency of the outdoor heat exchanger and reduces the risk of blockage of the outdoor heat exchanger. In addition, during the reverse rotation of the outdoor fan, the compressor operates synchronously, and before the end of the first platform operation cycle of the compressor, the outdoor fan is controlled to stop operating, so that the process of removing attachments by the reverse rotation of the outdoor fan is limited within the first platform operation cycle of the compressor, which can reduce the system pressure and the impact of the attachment removal process on the normal operation of the air conditioner. At the same time, the outdoor fan is controlled to rotate in the forward direction only after the outdoor fan has completely stopped operating, reducing the loss of the outdoor fan.

[0012] In a second aspect, some embodiments also provide an air conditioner, including:

[0013] An indoor unit, which is provided with an indoor heat exchanger and an indoor fan;

[0014] An outdoor unit, which is provided with an outdoor heat exchanger, an outdoor fan, a compressor, a throttling component and a four-way valve, and the compressor, the throttling component, the four-way valve, the outdoor heat exchanger and the indoor heat exchanger are connected by pipelines to form a refrigerant circulation loop;

[0015] A controller, configured to:

[0016] Obtain a air supply startup instruction, and in response to the air supply startup instruction, control the outdoor fan to rotate in the reverse direction; when the reverse rotation duration reaches a third duration threshold, control the outdoor fan to stop operating and the indoor fan to operate.

[0017] In some embodiments, in response to the air supply start-up instruction, the controller directly controls the outdoor fan to rotate in the reverse direction, so as to timely blow away the large-particle dust, flying floc and other attachments adhering to the outdoor heat exchanger of the outdoor unit at the start-up, avoiding the above attachments being gradually adsorbed into the fin gaps during the operation of the air conditioner, which affects the heat exchange efficiency of the outdoor heat exchanger and reduces the risk of blockage of the outdoor heat exchanger. In addition, when the reverse rotation duration reaches the third duration threshold, the controller controls the outdoor fan to stop running, so as to limit the process of removing attachments by the reverse rotation of the outdoor fan within a preset duration and reduce the impact on the normal operation of the air conditioner during the attachment removal process. At the same time, after the outdoor fan completely stops running, the controller controls the indoor fan to rotate in the forward direction, reducing the loss of the indoor fan and improving the air circulation in the room.

[0018] Thirdly, in some embodiments, a dust removal control method is further provided, including:

[0019] Obtaining a temperature adjustment start-up instruction, and in response to the temperature adjustment start-up instruction, controlling the outdoor fan to rotate in the reverse direction and the compressor to operate;

[0020] Before the end of the first platform operation cycle of the compressor, controlling the outdoor fan to stop running;

[0021] After the outdoor fan completely stops running, controlling the outdoor fan to rotate in the forward direction.

[0022] In some embodiments, in response to the temperature adjustment start-up instruction, the outdoor fan is directly controlled to rotate in the reverse direction, so as to timely blow away the large-particle dust, flying floc and other attachments adhering to the outdoor heat exchanger of the outdoor unit at the start-up, avoiding the above attachments being gradually adsorbed into the fin gaps during the operation of the air conditioner, which affects the heat exchange efficiency of the outdoor heat exchanger and reduces the risk of blockage of the outdoor heat exchanger. In addition, during the reverse rotation of the outdoor fan, the compressor operates synchronously, and before the end of the first platform operation cycle of the compressor, the outdoor fan is controlled to stop running, so as to limit the process of removing attachments by the reverse rotation of the outdoor fan within the first platform operation cycle of the compressor, which can reduce the system pressure and the impact on the normal operation of the air conditioner during the attachment removal process. At the same time, after the outdoor fan completely stops running, the outdoor fan is controlled to rotate in the forward direction, reducing the loss of the outdoor fan.

[0023] Fourthly, in some embodiments, a dust removal control method is further provided, including:

[0024] Obtaining an air supply start-up instruction, and in response to the air supply start-up instruction, controlling the outdoor fan to rotate in the reverse direction;

[0025] When the reverse rotation duration reaches the third duration threshold, control the outdoor fan to stop running and the indoor fan to run.

[0026] In some embodiments, in response to the air supply startup instruction, directly control the outdoor fan to rotate in the reverse direction, so that at startup, large particle dust, flying floc substances and other attachments attached to the outdoor heat exchanger of the outdoor unit can be blown away in time, avoiding the above attachments being gradually adsorbed into the fin gaps during the operation of the air conditioner, which affects the heat exchange efficiency of the outdoor heat exchanger and reduces the risk of blockage of the outdoor heat exchanger. In addition, when the reverse rotation duration reaches the third duration threshold, control the outdoor fan to stop running, so that the process of removing attachments by the reverse rotation of the outdoor fan is limited within a preset duration, reducing the impact of the attachment removal process on the normal operation of the air conditioner. At the same time, only after the outdoor fan completely stops running, control the indoor fan to rotate in the forward direction, reducing the loss of the indoor fan and improving the air circulation in the room.

[0027] In a fifth aspect, some embodiments further provide a dust removal control device, including:

[0028] A fan reverse rotation module, configured to obtain a temperature adjustment startup instruction and, in response to the temperature adjustment startup instruction, control the outdoor fan to rotate in the reverse direction and the compressor to run;

[0029] A fan stop rotation module, configured to control the outdoor fan to stop running before the end of the first platform operation cycle of the compressor;

[0030] A fan forward rotation module, configured to control the outdoor fan to rotate in the forward direction after the outdoor fan completely stops running.

[0031] In some embodiments, the fan reverse rotation module directly controls the outdoor fan to rotate in the reverse direction in response to the temperature adjustment startup instruction, so that at startup, large particle dust, flying floc substances and other attachments attached to the outdoor heat exchanger of the outdoor unit can be blown away in time, avoiding the above attachments being gradually adsorbed into the fin gaps during the operation of the air conditioner, which affects the heat exchange efficiency of the outdoor heat exchanger and reduces the risk of blockage of the outdoor heat exchanger. In addition, during the reverse rotation of the outdoor fan, the compressor runs synchronously, and before the end of the first platform operation cycle of the compressor, control the outdoor fan to stop running, so that the process of removing attachments by the reverse rotation of the outdoor fan is limited within the first platform operation cycle of the compressor, which can reduce the system pressure and reduce the impact of the attachment removal process on the normal operation of the air conditioner. At the same time, only after the outdoor fan completely stops running, control the outdoor fan to rotate in the forward direction, reducing the loss of the outdoor fan.

[0032] In a sixth aspect, some embodiments further provide a dust removal control device, including:

[0033] The air supply start module is configured to obtain an air supply start instruction and, in response to the air supply start instruction, control the outdoor fan to rotate in the reverse direction;

[0034] The air supply operation module is configured to, when the reverse rotation duration reaches a third duration threshold, control the outdoor fan to stop operating and the indoor fan to operate.

[0035] In some embodiments, the air supply start module directly controls the outdoor fan to rotate in the reverse direction in response to the air supply start instruction, so that large particle dust, flying floc substances and other attachments attached to the outdoor heat exchanger of the outdoor unit can be blown away in time when starting up, avoiding the above attachments from being gradually adsorbed into the fin gaps during the operation of the air conditioner, which affects the heat exchange efficiency of the outdoor heat exchanger and reduces the risk of blockage of the outdoor heat exchanger. In addition, when the reverse rotation duration reaches the third duration threshold, the outdoor fan is controlled to stop operating, so that the process of removing attachments by the reverse rotation of the outdoor fan is limited within a preset duration, reducing the impact of the attachment removal process on the normal operation of the air conditioner. At the same time, after the outdoor fan completely stops operating, the indoor fan is controlled to rotate in the forward direction, reducing the loss of the indoor fan and improving the air circulation in the room.

[0036] In a seventh aspect, some embodiments further provide a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the methods provided in some embodiments of the third or fourth aspect are implemented.

[0037] In an eighth aspect, some embodiments further provide a computer program product, including a computer program. When the computer program is executed by a processor, the steps of the methods provided in some embodiments of the third or fourth aspect are implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0039] Figure 1 It is a three-dimensional external view of an air conditioner provided in some embodiments of the present application;

[0040] Figure 2 It is a schematic structural diagram of an air conditioner provided in some embodiments of the present application;

[0041] Figure 3 It is a schematic diagram of the refrigerant cycle circuit of an air conditioner provided in some embodiments of the present application;

[0042] Figure 4 Schematic flowchart of the first dust removal control method provided by some embodiments of the present application;

[0043] Figure 5 Schematic flowchart of the step of controlling the outdoor fan to rotate in the reverse direction provided by some embodiments of the present application;

[0044] Figure 6 Schematic flowchart of the second dust removal control method provided by some embodiments of the present application;

[0045] Figure 7 Schematic flowchart of the third dust removal control method provided by some embodiments of the present application;

[0046] Figure 8 Schematic flowchart of the fourth dust removal control method provided by some embodiments of the present application;

[0047] Figure 9 Block diagram of the structure of the first dust removal control device provided by some embodiments of the present application;

[0048] Figure 10 Block diagram of the structure of the second dust removal control device provided by some embodiments of the present application;

[0049] Figure 11 Internal structure diagram of a computer device in one embodiment. Detailed implementation manners

[0050] The embodiments will be described in detail below, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following embodiments do not represent all implementation manners consistent with the present application. They are only examples of systems and methods consistent with some aspects of the present application described in detail in the claims.

[0051] It should be noted that the brief description of the terms in the present application is only for facilitating the understanding of the following described implementation manners, rather than intending to limit the implementation manners of the present application. Unless otherwise specified, these terms should be understood in their ordinary and common meanings.

[0052] The terms "first", "second", "third", etc. in the specification, claims and the above drawings of the present application are used to distinguish similar or homogeneous objects or entities, and do not necessarily mean to limit a specific order or sequence, unless otherwise noted. It should be understood that such terms can be interchanged under appropriate circumstances.

[0053] The terms "comprising" and "having" and any variations thereof are intended to cover inclusion without exclusion. For example, a product or device comprising a series of components need not be limited to all the components clearly listed, but may include other components not clearly listed or inherent to such products or devices.

[0054] The term "module" refers to any known or later-developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and / or software code capable of performing functions related to that element.

[0055] Please refer to Figures 1 to 2 , Figure 1 is a perspective view of the appearance of an air conditioner provided by an embodiment of the present invention. Figure 2 is a schematic structural view of an air conditioner provided by an embodiment of the present invention. In the air conditioner 1 provided by the embodiment of the present invention, it includes:

[0056] An indoor unit 2, which is internally provided with an indoor heat exchanger 21 and an indoor fan 22;

[0057] An outdoor unit 3, which is internally provided with an outdoor heat exchanger 31, an outdoor fan 32, a compressor 33, a throttling component 34, and a four-way valve 35. The compressor 33, the throttling component 34, the four-way valve 35, the outdoor heat exchanger 31, and the indoor heat exchanger 21 are connected through pipelines to form a refrigerant circulation loop;

[0058] The indoor heat exchanger 21 is configured to act as an evaporator or a condenser according to the operating state of the indoor unit, so as to perform heat exchange between the refrigerant flowing in the heat transfer tubes and the air passing through the indoor heat exchanger.

[0059] The outdoor heat exchanger 31 is configured to act as a condenser or an evaporator according to the operating state of the outdoor unit, so as to perform heat exchange between the refrigerant flowing in the heat transfer tubes and the air passing through the outdoor heat exchanger.

[0060] The compressor 33 is configured to compress the refrigerant into a high-temperature and high-pressure gas;

[0061] The throttling component 34 is configured to turn the medium-temperature and high-pressure liquid after the outdoor heat exchanger absorbs and releases heat into a low-temperature and low-pressure liquid;

[0062] The four-way valve 35 is configured to achieve the conversion between refrigeration and heating by changing the flow direction of the refrigerant in the circulation loop.

[0063] Specifically, in some embodiments, the air conditioner 1 includes an indoor unit 2. Taking an indoor wall-mounted unit (shown in the figure) as an example, the indoor wall-mounted unit is usually installed on an indoor wall surface or the like. Again, an indoor cabinet unit (not shown in the figure) is also a form of the indoor unit. An outdoor unit 3, which is usually arranged outdoors and is used for heat exchange with the indoor environment. Additionally, in Figure 1 the illustration, since the outdoor unit 3 is located outdoors on the opposite side of the wall surface from the indoor unit 2, the outdoor unit 3 is represented by a dashed line. The indoor unit 2 and the outdoor unit 3 are connected by a connecting pipe 4. Among them, the indoor unit 2 is internally provided with an indoor heat exchanger 21 and an indoor fan 22. When the air conditioner is in the cooling mode, the indoor heat exchanger 21 operates as an evaporator. The indoor heat exchanger 21 functions as an evaporator or a radiator according to the operating state of the indoor unit, enabling heat exchange between the refrigerant flowing in the heat transfer pipe and the air passing through the indoor heat exchanger. The indoor fan 22 generates an air flow of the indoor air passing through the indoor heat exchanger 21 to promote the heat exchange between the refrigerant flowing in the heat transfer pipe of the indoor heat exchanger 21 and the indoor air. The outdoor unit 3 is internally provided with an outdoor heat exchanger 31, an outdoor fan 32, a compressor 33, a throttling component (i.e., a flow regulating valve) 34, and a four-way valve 35. When the air conditioner is in the cooling mode, the outdoor heat exchanger 31 operates as a condenser. The outdoor fan 32 generates an air flow of the outdoor air passing through the outdoor heat exchanger 31 to promote the heat exchange between the refrigerant flowing in the heat transfer pipe of the outdoor heat exchanger 31 and the outdoor air.

[0064] Please refer to Figure 3 , Figure 3It is a schematic diagram of a refrigerant circulation circuit of an air conditioner provided by some embodiments of the present invention. A compressor 33, a throttling component 34, a four-way valve 35, an outdoor heat exchanger 31, and an indoor heat exchanger 21 are connected through pipelines to form a refrigerant circulation circuit. When the air conditioner is in the cooling mode, the indoor heat exchanger 21 and the outdoor heat exchanger 31 are respectively used as an evaporator and a condenser to operate. The refrigerant is compressed by the compressor to become a high-temperature and high-pressure gas, enters the outdoor heat exchanger of the outdoor unit through the four-way valve, becomes a medium-temperature and high-pressure liquid after absorbing cold and releasing heat in the outdoor heat exchanger, becomes a low-temperature and low-pressure liquid after passing through the flow regulating valve, becomes a low-temperature and low-pressure gas after the heat absorption and heat release effect of the indoor heat exchanger of the indoor unit, returns to the compressor through the four-way valve, and then continues to circulate. By circulating the refrigerant in the refrigerant circuit, a vapor compression refrigeration cycle can be executed. Among them, the flow regulating valve can change the opening degree. By reducing the opening degree, the flow path resistance of the refrigerant passing through the flow regulating valve increases; by increasing the opening degree, the flow path resistance of the refrigerant passing through the flow regulating valve decreases. Such a flow regulating valve expands and decompresses the refrigerant flowing from the indoor heat exchanger towards the outdoor heat exchanger during refrigeration operation. In addition, even if the states of other devices installed in the refrigerant circuit do not change, when the opening degree of the flow regulating valve changes, the flow rate of the refrigerant flowing in the refrigerant circuit will also change.

[0065] In some embodiments, the air conditioner 1 further includes:

[0066] The detector is configured to detect the current operating frequency of the compressor;

[0067] The timer is configured to start the first timing when the current operating frequency reaches a preset frequency threshold;

[0068] The outdoor temperature sensor is used to detect the outdoor temperature;

[0069] The controller is respectively connected to the indoor fan 22, the outdoor fan 32, the compressor 33, the detector, the timer, and the outdoor temperature sensor. The controller can be configured to: obtain a temperature adjustment start-up instruction, and in response to the temperature adjustment start-up instruction, control the outdoor fan to rotate in the reverse direction and the compressor to operate; before the end of the first platform operation cycle of the compressor, control the outdoor fan to stop operating, and after the outdoor fan completely stops operating, control the outdoor fan to rotate in the forward direction.

[0070] In some embodiments, when the controller controls the outdoor fan to rotate in the forward direction after the outdoor fan completely stops operating, it is configured to: after controlling the outdoor fan to stop operating, control the timer to perform the second timing, and when the second timing duration reaches the second duration threshold, control the outdoor fan to rotate in the forward direction.

[0071] In some embodiments, the temperature adjustment startup instruction includes a refrigeration startup instruction; when the controller controls the outdoor fan to rotate in the reverse direction in response to the temperature adjustment startup instruction, it is configured to: in response to the refrigeration startup instruction, control the outdoor fan to rotate in the reverse direction at a first speed.

[0072] In some embodiments, the temperature adjustment startup instruction includes a heating startup instruction; when the controller controls the outdoor fan to rotate in the reverse direction in response to the temperature adjustment startup instruction, it is configured to: in response to the heating startup instruction, control the outdoor fan to rotate in the reverse direction at a second speed.

[0073] In some embodiments, the air conditioner further includes: an outdoor temperature sensor for detecting the outdoor temperature; when the controller controls the outdoor fan to rotate in the reverse direction at a second speed in response to the heating startup instruction, it is configured to: in response to the heating startup instruction, select a target speed from at least two second speeds according to the outdoor temperature, and control the outdoor fan to rotate in the reverse direction at the target speed.

[0074] In some embodiments, the at least two second speeds include a third speed and a fourth speed; the fourth speed is greater than the third speed; when the controller selects a target speed from at least two second speeds according to the outdoor temperature, it is configured to: when the outdoor temperature is greater than a first temperature threshold, select the third speed as the target speed; when the outdoor temperature is not greater than the first temperature threshold, select the fourth speed as the target speed.

[0075] In some embodiments, the controller can also be configured to obtain a ventilation startup instruction, and in response to the ventilation startup instruction, control the outdoor fan to rotate in the reverse direction; when the reverse rotation duration reaches a third duration threshold, control the outdoor fan to stop running, and the indoor fan to run.

[0076] Since the outdoor unit 3 of the air conditioner 1 is usually installed on the outdoor side, and the fin spacing of the outdoor heat exchanger 31 in the outdoor unit 3 is only about 1.2 - 1.6 mm, it is very easy for dust, flying flocs and other attachments to adhere to the outdoor heat exchanger 31. During the operation of the air conditioner 1, these attachments are easily adsorbed on the surface of the heat exchanger, thus blocking the fins of the heat exchanger and causing problems such as poor heat exchange, affecting the operating performance of the whole machine. In the traditional technology, usually during the operation of the air conditioner 1, when the cumulative operation duration meets the preset duration condition, it enters the dust removal mode. After entering the dust removal mode, first control the compressor to stop running and the fan to stop, and then control the fan to rotate in reverse for dust removal, so as to achieve the effect of dust removal for the outdoor unit 3. And during the period when the air conditioner 1 is operating and before the conditions for the dust removal mode are reached, the dust, flying flocs and other substances that are already attached to the external heat exchanger 31 may have been further deeply adsorbed into the fin gaps along with the operation of the outdoor fan 32, and even cannot be removed by the reverse rotation of the fan, thus permanently blocking the outdoor heat exchanger 31 and affecting the heat exchange efficiency of the outdoor heat exchanger. Therefore, there is a problem of incomplete dust removal and affecting the heat exchange efficiency of the outdoor heat exchanger.

[0077] In some alternative embodiments, referring to Figure 4 , a dust removal control method is provided for use in a controller in the air conditioner 1, including:

[0078] S410, obtain a temperature adjustment start-up instruction, and in response to the temperature adjustment start-up instruction, control the outdoor fan to rotate in the reverse direction and the compressor to operate.

[0079] Among them, the temperature adjustment start-up instruction can be understood as a start-up instruction for adjusting the indoor temperature through the air conditioner 1. For example, the temperature adjustment start-up instruction can include a refrigeration start-up instruction and / or a heating start-up instruction.

[0080] Exemplarily, the manner of obtaining the temperature adjustment start-up instruction can be that the remote control sends a temperature adjustment start-up instruction to the controller in the air conditioner 1 in response to the user's trigger operation on the temperature adjustment start-up button for the air conditioner 1 to receive and obtain the temperature adjustment start-up instruction; it can also be that the air conditioner 1 generates a temperature adjustment start-up instruction in response to the trigger operation on the temperature adjustment start-up control on the air conditioner 1; or it can be that the mobile terminal sends a temperature adjustment start-up instruction to the controller in the air conditioner 1 in response to the user's trigger operation on the temperature adjustment start-up control in the application program (Applications) corresponding to the air conditioner 1 for the controller in the air conditioner 1 to receive.

[0081] In an alternative implementation, in response to a temperature adjustment startup instruction, the method for controlling the outdoor fan 32 to rotate in the reverse direction is as follows: The controller responds to the temperature adjustment startup instruction, determines the rotation speed of the outdoor fan 32 according to the instruction type of the temperature adjustment startup instruction, and controls the outdoor fan 32 to rotate in the reverse direction at the corresponding rotation speed.

[0082] Exemplarily, if the temperature adjustment startup instruction is a refrigeration startup instruction, then in response to the refrigeration startup instruction, control the outdoor fan 32 to rotate in the reverse direction at a first rotation speed; if the temperature adjustment instruction is a heating startup instruction, then in response to the heating startup instruction, control the outdoor fan 32 to rotate in the reverse direction at a second rotation speed. Among them, the second rotation speed is not less than the first rotation speed. The advantage of such a setting is that: in the case of air conditioner heating, usually the outdoor temperature is relatively low, and there may be snow accumulation on the outdoor unit 3, which affects the heating efficiency of the outdoor heat exchanger 31. Therefore, after responding to the heating startup instruction, using the second rotation speed with a higher rotation speed to control the outdoor fan 32 to rotate in the reverse direction can blow away the snow attached to the outdoor unit 3, avoiding the problem of reduced heat exchange performance caused by the relatively low surface temperature and small heat exchange area of the outdoor heat exchanger 31. At the same time, it can avoid frosting on the surface of the heat exchanger and further improve the operating efficiency of the heat exchanger. In the case of air conditioner refrigeration, usually the outdoor temperature is relatively high, and there are usually only attachments such as dust and flying fluffs on the outdoor unit 3. Therefore, using the first rotation speed with a smaller rotation speed to control the outdoor fan 31 to rotate in the reverse direction can make the outdoor fan 32 blow away larger particle attachments, reduce the dirt blockage during forward operation, and at the same time reduce the working load of the compressor, thereby reducing the energy consumption of the air conditioner.

[0083] It should be noted that during the process of the controller controlling the outdoor fan 32 to rotate in the reverse direction, the outdoor fan 32 can be controlled to operate at different rotation speeds alternately. For example, in the first reverse rotation cycle (such as the first 20 s), it operates at a high wind speed, in the second reverse rotation cycle (such as 21 - 30 s), it operates at a low wind speed, and in the third reverse rotation cycle (such as 31 - 50 s), it returns to the high wind speed, forming an intermittent pressure difference during this period to further assist in the peeling of dust and achieve a better dust removal effect.

[0084] Optionally, when the controller responds to the temperature adjustment startup instruction, it can control the compressor 33 to operate while controlling the outdoor fan 32 to rotate in the reverse direction; or, there is a certain time difference between the reverse rotation control of the outdoor fan 32 and the operation of the compressor 33 to avoid control interference. It should be noted that the above time difference is usually small, such as in milliseconds or microseconds, and is not limited here.

[0085] S420, before the end of the first platform operation cycle of the compressor, control the outdoor fan to stop operating.

[0086] Among them, the platform operation cycle can be understood as follows: during the operation of the compressor 33, in a complete operation cycle of the compressor 33, it first operates at a lower platform operation frequency to ensure the oil return operation time period. The platform operation frequency can be the operating frequency that dominates the time, has a higher occurrence frequency, and has an important impact on the performance of the compressor during the stable operation of the compressor 33. The compressor operating at the platform operation frequency operates relatively stably, with relatively small vibration and noise and strong energy efficiency (that is, strong refrigeration or heating capacity under unit energy consumption). The first platform operation cycle can be understood as the platform operation cycle in the first complete operation cycle after the air conditioner 1 is turned on.

[0087] In an alternative implementation, after the controller controls the operation of the compressor 33, it controls the detector to detect the current operating frequency of the compressor in real time or at regular intervals; when the current operating frequency reaches the preset frequency threshold, it controls the timer to start the first timing; when the first timing duration reaches the first duration threshold, it determines that the first platform operation cycle of the compressor 33 ends, and controls the outdoor fan to stop operating. Among them, the first duration threshold can be an empirical value set based on the past statistical duration of the first operating platform cycle of the compressor, such as 3 minutes. It should be noted that since the air volume attenuation of different types of air conditioners is different during the reverse rotation of the outdoor fan (generally not exceeding 20%), and the current operating frequency of the compressor is also different (generally not greater than 55 Hz), the first platform operation cycle duration of the compressors of different types of air conditioners is different. Therefore, different first duration thresholds can be set for different types of air conditioners.

[0088] The advantage of this setting is that by detecting whether the current operating frequency of the compressor reaches the preset frequency threshold, it is possible to more accurately determine the entry of the compressor into the first platform operation cycle. When the previous operating frequency of the compressor reaches the preset frequency threshold, it is determined that the compressor has entered the first platform operation cycle. Then, the timer starts the first timing. When the first timing duration reaches the first duration threshold, it is possible to accurately determine the end of the first platform operation cycle of the compressor, thereby controlling the outdoor fan to stop operating, and limiting the process of removing attachments by the reverse rotation of the outdoor fan within the first platform operation cycle of the compressor, which can reduce the system pressure and reduce the impact on the normal operation of the air conditioner during the attachment removal process.

[0089] S430, after the outdoor fan completely stops operating, control the outdoor fan to rotate forward.

[0090] In an alternative implementation, the controller controls the detector to detect the rotation speed of the outdoor fan 32 in real time or at regular intervals; when it detects that the rotation speed of the outdoor fan 32 is zero, it determines that the outdoor fan 32 has completely stopped operating; and controls the outdoor fan 32 to rotate forward.

[0091] In another alternative implementation, after the controller controls the outdoor fan 32 to stop running, it controls the timer to perform a second timing, and when the second timing duration reaches the second duration threshold, it controls the outdoor fan 32 to rotate forward. The second duration threshold can be an empirical value set based on the duration required for the outdoor fan to reverse and come to a complete stop in past statistics. It should be noted that since different types of air conditioners have different durations required for their outdoor fans to stop, different second duration thresholds can be set for different types of air conditioners.

[0092] Specifically, after the controller sends a stop running instruction to the outdoor fan 32, it controls the timer to perform a second timing; when the controller detects that the second timing duration reaches the second duration threshold, the controller controls the outdoor fan 32 to rotate forward. The advantage of this setting is that by detecting whether the second timing duration reaches the second duration threshold, it is determined whether the outdoor fan 32 has stopped running. Only after the outdoor fan 32 has completely stopped running is it controlled to rotate forward, reducing the wear and tear on the outdoor fan.

[0093] In the above dust removal control method, in response to a temperature adjustment startup instruction, the outdoor fan is directly controlled to rotate in the reverse direction, so that large particle dust, flying floc substances and other attachments on the outdoor heat exchanger of the outdoor unit can be blown away in time when starting up, avoiding the above attachments from being gradually adsorbed deeper into the fin gaps during the operation of the air conditioner, which affects the heat exchange efficiency of the outdoor heat exchanger and reduces the risk of blockage of the outdoor heat exchanger. In addition, during the reverse rotation of the outdoor fan, the compressor runs synchronously, and before the end of the first platform operation cycle of the compressor, the outdoor fan is controlled to stop running, so that the process of removing attachments by the reverse rotation of the outdoor fan is limited within the first platform operation cycle of the compressor, which can reduce the system pressure and reduce the impact on the normal operation of the air conditioner during the attachment removal process. At the same time, only after the outdoor fan has completely stopped running is it controlled to rotate forward, reducing the wear and tear on the outdoor fan.

[0094] Based on the technical solutions of the above embodiments, in some embodiments, the temperature adjustment startup instruction is further refined into a heating startup instruction, and the step of controlling the outdoor fan to rotate in the reverse direction at a second speed is refined.

[0095] See Figure 5 The flowchart of the step of controlling the outdoor fan to rotate in the reverse direction provided. Specifically, the control steps of the outdoor fan include:

[0096] S510, in response to the heating startup instruction, select a target speed from at least two second speeds according to the outdoor temperature, and control the outdoor fan to rotate in the reverse direction at the target speed.

[0097] Among them, at least two second rotational speeds include a third rotational speed and a fourth rotational speed, and the fourth rotational speed is greater than the third rotational speed.

[0098] Specifically, in response to a heating startup instruction, the controller controls the outdoor temperature sensor to detect the outdoor temperature; based on the magnitude relationship between the outdoor temperature and the first temperature threshold, a target rotational speed is selected from at least two second rotational speeds; the controller controls the outdoor fan to rotate in the reverse direction at the target rotational speed. Among them, the first temperature threshold can be set based on the outdoor temperature when snow accumulates on the outdoor fan during a past period. For example, the first temperature threshold can be 2°C or 0°C.

[0099] Exemplarily, the magnitude relationship between the outdoor temperature and the first temperature threshold is determined; when the outdoor temperature is greater than the first temperature threshold, the smaller third rotational speed is selected as the target rotational speed; when the outdoor temperature is not greater than the first temperature threshold, the larger fourth rotational speed is selected as the target rotational speed. The advantage of such a setting is that when the outdoor temperature is greater than the first temperature threshold, since the outdoor temperature is relatively high, there may be no snow accumulation on the outdoor heat exchanger 31 at this time, and there are only attachments such as dust and flying fluffs. Therefore, by setting the smaller third rotational speed as the target rotational speed, the outdoor fan 32 can blow away larger particle attachments, reduce fouling during forward operation, and at the same time reduce the working load of the compressor, thereby reducing the energy consumption of the air conditioner. When the outdoor temperature is not greater than the first temperature threshold, since the outdoor unit 3 is placed on the outdoor side, snow may accumulate on the outer surface of the outdoor heat exchanger 31 when the outdoor temperature is relatively low. Therefore, by setting the larger fourth rotational speed as the target rotational speed, the accumulated snow can be blown away, avoiding the problem of reduced heat exchange performance due to the relatively low surface temperature and smaller heat exchange area of the outdoor heat exchanger 31, and at the same time, preventing frosting on the heat exchanger surface and further improving the operating efficiency of the heat exchanger.

[0100] It should be noted that in some embodiments, the third rotational speed can also be set to be not less than the first rotational speed. Since the air density in a high-temperature environment is less than that in a low-temperature environment, large particle dust and flying fluffs and other attachments have poor adhesion and are easy to suspend in a high-temperature environment. Therefore, large particle dust and flying fluff substances are easier to be blown away in a high-temperature environment than in a low-temperature environment. Therefore, the first rotational speed can be set to be not greater than the third rotational speed. At this time, when the outdoor fan is in a high-temperature environment and rotates in the reverse direction at the first rotational speed, a good dust removal effect can also be achieved, and at the same time, the working load of the compressor can be reduced, further reducing the energy consumption of the air conditioner.

[0101] In the above optional embodiments, in response to a heating start-up instruction, the controller selects a target speed from at least two second speeds according to the outdoor temperature, and controls the outdoor fan to rotate in the reverse direction at the target speed, so that the outdoor fan can rotate in the reverse direction at different speeds in different outdoor temperature environments, thereby reducing the setting of a unified speed, which will affect the snow removal effect on the outdoor unit, further improving the dust and snow removal efficiency of the outdoor heat exchanger, and reducing the risk of blockage of the outdoor heat exchanger.

[0102] Based on the technical solutions of the above embodiments, in some optional embodiments, refer to Figure 6 , a dust removal control method is provided, which is applied to the controller in the air conditioner 1 and includes:

[0103] S610, obtain a blowing start-up instruction, and in response to the blowing start-up instruction, control the outdoor fan to rotate in the reverse direction.

[0104] Among them, the blowing start-up instruction can be understood as an instruction to control the indoor unit 2 of the air conditioner 1 to operate. During the blowing process of the air conditioner, the compressor 33 of the air conditioner 1 does not work, and only the outdoor fan 32 continues to operate. The air conditioner 1 continuously inhales and blows out the indoor air. At this time, the air temperature does not change, but only the indoor fan 22 accelerates the air flow to achieve the effect of increasing the indoor air circulation.

[0105] Exemplarily, the method of obtaining the fan start-up instruction can be that the remote control responds to the triggering operation of the blowing start-up control button and sends a blowing start-up instruction to the controller in the air conditioner 1 for the controller in the air conditioner 1 to receive and obtain the blowing start-up instruction; it can also be that the air conditioner 1 responds to the triggering operation of the blowing start-up control button on the air conditioner 1 to obtain the blowing start-up instruction.

[0106] Specifically, the controller controls the outdoor fan 32 to run in the reverse direction at the first speed in response to the blowing start-up instruction. It should be noted that since the outdoor heat exchanger 31 is not started in the blowing mode of the air conditioner, the dust on the outdoor heat exchanger 31 does not affect the normal operation of the blowing mode. Therefore, in some embodiments, in order to further reduce the energy consumption of the air conditioner, after responding to the blowing start-up instruction, the outdoor fan can also be periodically or irregularly controlled to rotate in the reverse direction for dust removal. For example, after continuously responding to the blowing start-up instruction twice, the outdoor fan is controlled to rotate in the reverse direction for dust removal once.

[0107] S620, when the reverse rotation duration reaches the third duration threshold, control the outdoor fan to stop running and the indoor fan to run.

[0108] Specifically, after the controller controls the outdoor fan to rotate in the reverse direction, it controls the timer to start the third timing, and uses the third timing duration as the reverse rotation duration. When the controller detects that the reverse rotation duration reaches the third duration threshold, it controls the outdoor fan to stop running and the indoor fan to run. Among them, the third duration threshold can be an empirical value set based on the duration required for the outdoor fan to rotate in the reverse direction to come to a complete stop in the past. For example, the third duration threshold can be 30s or 60s.

[0109] In the above dust removal control method, in response to the air supply startup instruction, the controller directly controls the outdoor fan to rotate in the reverse direction, so that large particle dust, flying floc substances and other attachments attached to the outdoor heat exchanger of the outdoor unit can be blown away in time when starting up, avoiding the above attachments from being gradually adsorbed deeper into the fin gaps during the operation of the air conditioner, which affects the heat exchange efficiency of the outdoor heat exchanger and reduces the risk of blockage of the outdoor heat exchanger. In addition, when the reverse rotation duration reaches the third duration threshold, the controller controls the outdoor fan to stop running, so that the process of removing attachments by the reverse rotation of the outdoor fan is limited within a preset duration, reducing the impact on the normal operation of the air conditioner during the attachment removal process. At the same time, after the outdoor fan completely stops running, the controller controls the indoor fan to rotate in the forward direction, reducing the loss of the indoor fan and improving the air circulation in the room.

[0110] Based on the technical solutions of the above embodiments, in some optional embodiments, taking the controller applied to an air conditioner as an example, the dust removal control process in the cooling scenario is described.

[0111] See Figure 7 The dust removal control method shown includes:

[0112] S710, in response to the cooling startup instruction, control the outdoor fan to rotate in the reverse direction at the first speed and the compressor to run.

[0113] S720, when the first timing duration reaches the first duration threshold, control the outdoor fan to stop running.

[0114] S730, after controlling the outdoor fan to stop running, control the timer to perform the second timing, and when the second timing duration reaches the second duration threshold, control the outdoor fan to rotate in the forward direction.

[0115] Based on the technical solutions of the above embodiments, in some optional embodiments, taking the controller applied to an air conditioner as an example, the dust removal control process in the heating scenario is described.

[0116] See Figure 8 The dust removal control method shown includes:

[0117] S810, in response to the heating start-up instruction, obtain the outdoor temperature at the current moment collected by the outdoor temperature sensor;

[0118] When the outdoor temperature is greater than the first temperature threshold, execute step S820; when the outdoor temperature is not greater than the first temperature threshold, execute step S830.

[0119] S820, select the third rotational speed as the target rotational speed.

[0120] S830, select the fourth rotational speed as the target rotational speed.

[0121] S840, control the outdoor fan to rotate in the reverse direction at the target rotational speed and the compressor to operate.

[0122] S850, when the first timing duration reaches the first duration threshold, control the outdoor fan to stop operating.

[0123] S860, after controlling the outdoor fan to stop operating, control the timer to perform the second timing, and when the second timing duration reaches the second duration threshold, control the outdoor fan to rotate in the forward direction.

[0124] Based on the same inventive concept, an embodiment of the present application further provides a dust removal control device for implementing the above-mentioned dust removal control method. The solution provided by the device for solving the problem is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the dust removal control device provided below can refer to the limitations on the dust removal control method in the above text and will not be repeated here.

[0125] In an exemplary embodiment, as Figure 9 shown, a dust removal control device is provided, including: a fan reverse rotation module 910, a fan stop rotation module 920, and a fan forward rotation module 930. Among them,

[0126] The fan reverse rotation module 910 is used to obtain a temperature adjustment start-up instruction, and in response to the temperature adjustment start-up instruction, control the outdoor fan to rotate in the reverse direction and the compressor to operate;

[0127] The fan stop rotation module 920 is used to control the outdoor fan to stop operating before the end of the first platform operation cycle of the compressor;

[0128] The fan forward rotation module 930 is used to control the outdoor fan to rotate in the forward direction after the outdoor fan completely stops operating.

[0129] In some embodiments, the fan stop rotation module 920 is further used to control the outdoor fan to stop operating when the first timing duration reaches the first duration threshold.

[0130] In some embodiments, the forward rotation module 930 of the blower is further configured to, after controlling the outdoor blower to stop running, control a timer to perform a second timing, and control the outdoor blower to rotate forward when the second timing duration reaches a second duration threshold.

[0131] In some embodiments, the reverse rotation module 910 of the blower is further configured to, in response to a refrigeration startup instruction, control the outdoor blower to rotate in the reverse direction at a first speed.

[0132] In some embodiments, the reverse rotation module 910 of the blower is further configured to, in response to a heating startup instruction, control the outdoor blower to rotate in the reverse direction at a second speed.

[0133] In some embodiments, the reverse rotation module 910 of the blower is further configured to, in response to a heating startup instruction, select a target speed from at least two second speeds according to the outdoor temperature, and control the outdoor blower to rotate in the reverse direction at the target speed.

[0134] In some embodiments, the reverse rotation module 910 of the blower is further configured to select a third speed as the target speed when the outdoor temperature is greater than a first temperature threshold; and select a fourth speed as the target speed when the outdoor temperature is not greater than the first temperature threshold.

[0135] In an exemplary embodiment, as Figure 10 shown, a dust removal control device is provided, including: a air supply start module 1010 and an air supply operation module 1020. Among them,

[0136] The air supply start module 1010 is configured to obtain an air supply startup instruction, and in response to the air supply startup instruction, control the outdoor blower to rotate in the reverse direction;

[0137] The air supply operation module 1020 is configured to, when the reverse rotation duration reaches a third duration threshold, control the outdoor blower to stop running, and the indoor blower to run.

[0138] Each module in the above dust removal control device can be implemented in whole or in part by software, hardware, and their combination. Each of the above modules can be embedded in or independent of a processor in a computer device in the form of hardware, or stored in a memory in the computer device in the form of software, so that the processor can call and execute the operations corresponding to each of the above modules.

[0139] In an exemplary embodiment, a computer device is provided. The computer device can be a terminal, and its internal structure diagram can be as Figure 11As shown in the figure. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit, and an input device. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface, the display unit, and the input device are connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with external terminals in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, near field communication (NFC), or other technologies. The computer program, when executed by the processor, implements an audio noise reduction method. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device, or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen. The input device of the computer device can be a touch layer covered on the display screen, or a button, a trackball, or a touchpad provided on the outer shell of the computer device, or an external keyboard, touchpad, or mouse, etc.

[0140] Those skilled in the art can understand that Figure 11 the structure shown in the figure is only a block diagram of some structures related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0141] In an alternative embodiment, Figure 11 the computer device shown in the figure may be the aforementioned projection device, for example, it may be a laser TV.

[0142] In an exemplary embodiment, a computer device is provided, including a memory and a processor. A computer program is stored in the memory, and when the processor executes the computer program, the steps in the above method embodiments are implemented. In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by the processor, the steps in the above method embodiments are implemented.

[0143] In an embodiment, a computer program product is provided, including a computer program, and when the computer program is executed by the processor, the steps in the above method embodiments are implemented.

[0144] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in this application are all information and data that have been authorized by the user or fully authorized by all parties, and the collection, use, and processing of relevant data need to comply with relevant regulations.

[0145] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The databases involved in the embodiments provided in this application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., without limitation. The processors involved in the embodiments provided in this application can be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, data processing logics based on quantum computing, artificial intelligence (AI) processors, etc., without limitation.

[0146] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this application.

[0147] The above embodiments only express several implementation manners of this application, and their descriptions are relatively specific and detailed. However, it should not be construed as a limitation to the patent scope of this application. It should be noted that for those of ordinary skill in the art, without departing from the concept of this application, several deformations and improvements can still be made, and these all belong to the protection scope of this application. Therefore, the protection scope of this application should be subject to the appended claims.

Claims

1. An air conditioner, characterized in that: The air conditioner comprises: An indoor unit, which is equipped with an indoor heat exchanger and an indoor fan; An outdoor unit, which is provided with an outdoor heat exchanger, an outdoor fan, a compressor, a throttling assembly and a four-way valve, wherein the compressor, the throttling assembly, the four-way valve, the outdoor heat exchanger and the indoor heat exchanger are connected through pipelines to form a refrigerant circulation loop; The controller is configured as: A temperature adjustment start-up instruction is obtained, and in response to the temperature adjustment start-up instruction, the outdoor fan is controlled to rotate in reverse and the compressor is operated; before the first platform operation cycle of the compressor ends, the outdoor fan is controlled to stop running, and after the outdoor fan completely stops running, the outdoor fan is controlled to rotate in the forward direction.

2. The air conditioner according to claim 1, characterized in that: The air conditioner also includes: a detector configured to detect a current operating frequency of the compressor; A timer, configured to start a first timing when the current operating frequency reaches a preset frequency threshold; When the controller controls the outdoor fan to stop running before the first platform operation cycle of the compressor ends, the controller is configured as follows: When the first timing duration reaches a first duration threshold, the outdoor fan is controlled to stop running.

3. The air conditioner according to claim 2, characterized in that: When the controller controls the outdoor fan to rotate in the forward direction after the outdoor fan completely stops running, the controller is configured as follows: After controlling the outdoor fan to stop running, controlling the timer to perform a second timing, and when the second timing duration reaches a second duration threshold, controlling the outdoor fan to rotate in the forward direction.

4. The air conditioner according to any one of claims 1 to 3, characterized in that: The temperature adjustment start-up instruction includes a cooling start-up instruction; when the controller controls the outdoor fan to rotate in the reverse direction in response to the temperature adjustment start-up instruction, the controller is configured as follows: In response to the cooling start-up instruction, the outdoor fan is controlled to rotate in the reverse direction at a first speed.

5. The air conditioner according to any one of claims 1 to 3, characterized in that: The temperature adjustment start-up instruction includes a heating start-up instruction; when the controller controls the outdoor fan to rotate in the reverse direction in response to the temperature adjustment start-up instruction, the controller is configured as follows: In response to the heating start-up instruction, the outdoor fan is controlled to rotate in the reverse direction at a second speed.

6. The air conditioner according to claim 5, characterized in that: The air conditioner also includes: Outdoor temperature sensor, used to detect outdoor temperature; When the controller controls the outdoor fan to rotate in the reverse direction at a second speed in response to the heating startup instruction, the controller is configured as follows: In response to the heating start-up instruction, a target speed is selected from at least two second speeds according to the outdoor temperature, and the outdoor fan is controlled to rotate in the reverse direction at the target speed.

7. The air conditioner according to claim 6, characterized in that: The at least two second rotational speeds include a third rotational speed and a fourth rotational speed; the fourth rotational speed is greater than the third rotational speed; When the controller selects a target speed from at least two second speeds according to the outdoor temperature, the controller is configured as follows: When the outdoor temperature is greater than a first temperature threshold, selecting the third speed as the target speed; When the outdoor temperature is not greater than the first temperature threshold, the fourth speed is selected as the target speed.

8. An air conditioner, characterized in that: The air conditioner comprises: An indoor unit, which is equipped with an indoor heat exchanger and an indoor fan; An outdoor unit, which is provided with an outdoor heat exchanger, an outdoor fan, a compressor, a throttling assembly and a four-way valve, wherein the compressor, the throttling assembly, the four-way valve, the outdoor heat exchanger and the indoor heat exchanger are connected through pipelines to form a refrigerant circulation loop; The controller is configured as: Obtain an air supply start-up instruction, and in response to the air supply start-up instruction, control the outdoor fan to rotate in reverse; when the reverse rotation duration reaches a third duration threshold, control the outdoor fan to stop running, and the indoor fan to run.

9. A dust removal control method, characterized in that: The method comprises: Obtaining a temperature adjustment start-up instruction, and in response to the temperature adjustment start-up instruction, controlling the outdoor fan to rotate in reverse and the compressor to run; Before the first platform operation cycle of the compressor ends, controlling the outdoor fan to stop running; After the outdoor fan completely stops running, the outdoor fan is controlled to rotate in the forward direction.

10. A dust removal control method, characterized in that: The method comprises: Obtaining an air supply start-up instruction, and in response to the air supply start-up instruction, controlling the outdoor fan to rotate in the reverse direction; When the reverse rotation duration reaches a third duration threshold, the outdoor fan is controlled to stop running and the indoor fan is controlled to start.

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