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

Abstract

Disclosed in the present application are a defrosting control method for an air conditioner, operating control apparatus, an air conditioner and a storage medium. The defrosting control method comprises: when a preset defrosting condition is met, controlling a four-way valve to switch to a state in which an exhaust port of a compressor is in communication with an outdoor heat exchanger, and acquiring an outdoor ambient temperature and an outdoor heat exchanger temperature (S310); when the outdoor ambient temperature is lower than a first preset temperature and the outdoor heat exchanger temperature is lower than a second preset temperature, controlling an outdoor fan to stop (S320); when the outdoor heat exchanger temperature rises to be higher than or equal to the second preset temperature, controlling the outdoor fan to blow air to a rear grille at a first preset rotation speed (S330); and when the outdoor heat exchanger temperature rises to be higher than a defrosting exit temperature, controlling the outdoor fan to blow air to the rear grille at a second preset rotation speed (S340).

Description

Defrosting control method, control device, air conditioner and storage medium for air conditioners

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202410912124.0, filed on July 8, 2024, entitled "Defrosting Control Method, Control Device, Air Conditioner and Storage Medium for Air Conditioner", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of air conditioning control technology, and in particular to a defrosting control method, operation control device, air conditioner, and computer-readable storage medium for an air conditioner. Background Technology

[0004] In some portable air conditioners, to prevent users from getting their hands scratched by the fins of the outdoor heat exchanger installed inside the air conditioner, a relatively dense plastic mesh back net is installed on the outside of the outdoor heat exchanger. However, in snowy weather, snow easily accumulates on the mesh and the fins of the outdoor heat exchanger, resulting in poor heat exchange performance of the outdoor unit.

[0005] Summary of the Invention

[0006] The purpose of this application is to at least partially solve one of the technical problems existing in the prior art, and to this end, to provide a defrosting control method for an air conditioner, an operation control device, an air conditioner, and a computer-readable storage medium.

[0007] In a first aspect, embodiments of this application provide a defrosting control method for an air conditioner, wherein the outdoor unit of the air conditioner is provided with a back mesh located outside the outdoor heat exchanger, the method comprising:

[0008] When the preset defrosting conditions are met, the four-way valve is controlled to switch to the state of connecting the compressor's exhaust port and the outdoor heat exchanger, and the outdoor ambient temperature and the outdoor heat exchanger temperature are obtained.

[0009] When the outdoor ambient temperature is lower than the first preset temperature and the outdoor heat exchanger temperature is lower than the second preset temperature, the outdoor fan is controlled to stop.

[0010] When the temperature of the outdoor heat exchanger rises to a level greater than or equal to the second preset temperature, the outdoor fan is controlled to blow air onto the back mesh at a first preset speed; and

[0011] When the temperature of the outdoor heat exchanger rises above the defrost exit temperature, the outdoor fan is controlled to blow air onto the back mesh at a second preset speed.

[0012] Wherein: the first preset speed is less than the second preset speed.

[0013] According to some embodiments of the defrosting control method provided in this application, the lower the outdoor ambient temperature falls within the temperature range, the higher the second preset temperature.

[0014] According to some embodiments of the present application, the defrosting control method is provided such that when the outdoor ambient temperature is less than 0°C and greater than or equal to -8°C, the second preset temperature is a first temperature greater than 5°C; when the outdoor ambient temperature is less than -8°C and greater than or equal to -15°C, the second preset temperature is a second temperature greater than the first temperature; and when the outdoor ambient temperature is less than -15°C, the second preset temperature is a third temperature greater than the second temperature.

[0015] According to some embodiments of the defrosting control method provided in this application, the lower the temperature range into which the outdoor ambient temperature falls, the lower the first preset rotation speed.

[0016] According to some embodiments of the defrosting control method provided in this application, when the outdoor ambient temperature is less than 0°C and greater than or equal to -8°C, the first preset speed is a first speed; when the outdoor ambient temperature is less than -8°C and greater than or equal to -15°C, the first preset speed is a second speed less than the first speed; and when the outdoor ambient temperature is less than -15°C, the first preset speed is a third speed less than the second speed.

[0017] According to some embodiments of the present application, the defrosting control method is provided in which the outdoor fan blows air onto the back net at a second preset speed for a preset duration and then exits defrosting.

[0018] According to some embodiments of the defrosting control method provided in this application, the lower the temperature range into which the outdoor ambient temperature falls, the longer the preset duration.

[0019] According to some embodiments of the defrosting control method provided in this application, when the outdoor ambient temperature is less than 0°C and greater than or equal to -8°C, the preset duration is a first duration; when the outdoor ambient temperature is less than -8°C and greater than or equal to -15°C, the preset temperature is a second duration greater than the first duration; and when the outdoor ambient temperature is less than -15°C, the preset temperature is a third duration greater than the second duration.

[0020] The defrosting control method provided in some embodiments of this application further includes: controlling the outdoor fan to stop when the outdoor ambient temperature is greater than the first preset temperature; and exiting defrosting when the outdoor heat exchanger temperature rises to a level greater than the defrosting exit temperature.

[0021] Secondly, embodiments of this application provide an operation control device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the defrosting control method for an air conditioner as described in the first aspect embodiment above.

[0022] Thirdly, embodiments of this application provide an air conditioner including the operation control device described in the second aspect of the embodiments above.

[0023] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions for causing a computer to perform the defrosting control method for an air conditioner as described in the first aspect embodiment above.

[0024] Other features and advantages of this application will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the description, claims and drawings. Attached Figure Description

[0025] The accompanying drawings are used to provide a further understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0026] The present application will be further described below with reference to the accompanying drawings and embodiments;

[0027] Figure 1 is a system block diagram of an air conditioner provided in an embodiment of this application;

[0028] Figure 2 is a logical schematic diagram of a defrosting control method for an air conditioner provided in an embodiment of this application;

[0029] Figure 3 is a logical schematic diagram of another defrosting control method for an air conditioner provided in an embodiment of this application;

[0030] Figure 4 is a logical schematic diagram of another defrosting control method for an air conditioner provided in an embodiment of this application;

[0031] Figure 5 is a logical schematic diagram of another defrosting control method for an air conditioner provided in an embodiment of this application; and

[0032] Figure 6 is a schematic diagram of the structure of an operation control device provided in an embodiment of this application. Detailed Implementation

[0033] This section will describe in detail the specific embodiments of this application. Preferred embodiments of this application are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of this application, but they should not be construed as limiting the scope of protection of this application.

[0034] In the description of this application, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0035] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0036] In some portable air conditioners, to prevent users from getting their hands scratched by the fins of the outdoor heat exchanger installed inside the air conditioner, a relatively dense plastic mesh back net is installed on the outside of the outdoor heat exchanger. However, in snowy weather, snow easily accumulates on the mesh and the fins of the outdoor heat exchanger, resulting in poor heat exchange performance of the outdoor unit.

[0037] In related technologies, the frost on the fins of the outdoor heat exchanger is melted by keeping the outdoor fan off and turning on the cooling mode. However, this method can only melt the frost on the fins and cannot melt the snow accumulated on the back screen. Moreover, over time, the snow on the back screen of the outdoor unit will increase, causing the outdoor unit to lose its heat exchange capacity and heating effect.

[0038] Embodiments of this application provide a defrosting control method, operation control device, air conditioner, and computer-readable storage medium for an air conditioner, which can effectively remove snow accumulated on the back mesh and maintain the heating effect of the air conditioner in snowy weather.

[0039] The embodiments of this application will be further described below with reference to the accompanying drawings.

[0040] Referring to Figure 1, the outdoor unit of the air conditioner is equipped with an outdoor heat exchanger 110 and an outdoor fan, and the indoor unit of the air conditioner is equipped with an indoor heat exchanger 210, a four-way valve 220, a compressor 230 and an electronic expansion valve 240.

[0041] Referring to Figure 2, a first aspect of this application provides a defrosting control method for an air conditioner. The outdoor unit of the air conditioner is provided with a back mesh located outside the outdoor heat exchanger 110. The method includes steps S310-S340:

[0042] Step S310: When the preset defrosting conditions are met, control the four-way valve 220 to switch to the state of connecting the exhaust port of the compressor 230 and the outdoor heat exchanger 110, and obtain the outdoor ambient temperature and the outdoor heat exchanger temperature.

[0043] Step S320: When the outdoor ambient temperature is lower than the first preset temperature and the outdoor heat exchanger temperature is lower than the second preset temperature, control the outdoor fan to stop.

[0044] Step S330: When the outdoor heat exchanger temperature rises to a level greater than or equal to the second preset temperature, control the outdoor fan to blow air onto the back mesh at a first preset speed.

[0045] Step S340: When the outdoor heat exchanger temperature rises above the defrost exit temperature, control the outdoor fan to blow air onto the back mesh at the second preset speed;

[0046] Wherein: the first preset speed is less than the second preset speed.

[0047] According to the defrosting control method for an air conditioner provided in the embodiments of this application, when the preset defrosting conditions are met, the air conditioner switches from heating mode to cooling mode, and controls the four-way valve 220 to switch to the state of connecting the exhaust port of the compressor 230 to the outdoor heat exchanger 110. At this time, high-temperature and high-pressure refrigerant gas will flow from the exhaust port of the compressor 230 to the outdoor heat exchanger 110. During the heat release and condensation process on the outdoor heat exchanger 110, the temperature of the outdoor heat exchanger rises. The outdoor ambient temperature and the outdoor heat exchanger temperature are obtained. When the outdoor ambient temperature is lower than the first preset temperature and the outdoor heat exchanger temperature is lower than the second preset temperature, in order to avoid the outdoor heat exchanger temperature from rising after the outdoor fan is turned on, If the temperature drops and the frost or snow on the surface of the outdoor heat exchanger 110 cannot be removed, the outdoor fan needs to be stopped until the outdoor heat exchanger temperature rises to a level greater than or equal to the second preset temperature. Then, the outdoor fan is controlled to blow air onto the back mesh at a first preset speed, so that the outdoor heat exchanger 110 can defrost normally and melt the snow on the back mesh. Furthermore, when the outdoor heat exchanger temperature rises to a level greater than the defrost exit temperature, the outdoor fan is controlled to blow air onto the back mesh at a second preset speed greater than the first preset speed, so that the snow remaining on the back mesh and the water droplets after the snow melts are blown away, avoiding residue. This allows the air conditioner to maintain a good heating effect when the heating mode is turned on in snowy weather.

[0048] It should be noted that in snowy weather, if the air conditioner is running in heating mode and defrosting is not performed, more and more snow will accumulate on the fins of the outdoor heat exchanger 110 and on the back mesh outside the outdoor heat exchanger 110 over time. The heat exchange capacity of the outdoor heat exchanger 110 will become worse and worse, which will seriously affect the heating effect of the air conditioner. Therefore, when the preset defrosting conditions are met, the system will switch to cooling mode, which will raise the temperature of the outdoor heat exchanger to melt the frost or ice accumulated on the outdoor heat exchanger 110.

[0049] Understandably, when the outdoor ambient temperature is lower than the first preset temperature, and the outdoor heat exchanger temperature rises to a level greater than or equal to the second preset temperature, the outdoor fan is controlled to blow air onto the back mesh at a lower first preset speed. This maintains a certain amount of hot air being blown out, allowing the outdoor heat exchanger 110 to defrost normally while melting the snow on the back mesh.

[0050] Understandably, when the outdoor ambient temperature is lower than the first preset temperature, and the outdoor heat exchanger temperature rises above the defrost exit temperature, defrosting is not immediately stopped. Instead, the outdoor fan is controlled to blow air onto the back screen at a higher second preset speed. This ensures that the outdoor heat exchanger 110 and the back screen can defrost normally, while also blowing away any remaining snow and water droplets from the melted snow on the back screen to prevent residue and improve the defrosting speed.

[0051] Understandably, different outdoor fan speeds designed according to different outdoor ambient temperatures can ensure that the frost hanging on the heat exchanger fins and back mesh of the outdoor unit is removed, shorten the defrosting time, quickly restore the heating state, and improve the user experience.

[0052] Preferably, the first preset temperature is 0°C.

[0053] Preferably, the second preset temperature is 5.5℃, and the second preset temperature can be appropriately adjusted within the range of 5.5℃-10℃.

[0054] Understandably, under the premise of meeting the preset defrosting conditions, when the outdoor ambient temperature is less than 0℃ and the outdoor heat exchanger temperature is less than 5.5℃, controlling the outdoor fan to stop can ensure that the outdoor heat exchanger temperature drops after the outdoor fan is turned on, thus preventing the frost or snow on the surface of the outdoor heat exchanger 110 from being removed.

[0055] It should be noted that the defrosting effect is achieved when the outdoor heat exchanger temperature is above 0 degrees Celsius. The second preset temperature is above 5 degrees Celsius. Only when the outdoor heat exchanger temperature is above the second preset temperature can the outdoor fan be controlled to blow air onto the back grid at the first preset speed. This allows for a certain temperature margin, preventing the outdoor heat exchanger temperature from dropping after the outdoor fan is turned on and losing the defrosting effect.

[0056] According to some embodiments of the present application, the lower the outdoor ambient temperature falls within a certain temperature range, the higher the second preset temperature.

[0057] Specifically, when the outdoor ambient temperature is less than 0℃ and greater than or equal to -8℃, the second preset temperature is the first temperature Ts1, which is greater than 5℃; when the outdoor ambient temperature is less than -8℃ and greater than or equal to -15℃, the second preset temperature is the second temperature Ts2, which is greater than the first temperature Ts1; and when the outdoor ambient temperature is less than -15℃, the second preset temperature is the third temperature Ts3, which is greater than the second temperature Ts2.

[0058] Preferably, the first temperature Ts1 is 5.5℃, and the first temperature Ts1 can be appropriately adjusted within the range of 5.5℃-10℃.

[0059] Preferably, the second temperature Ts2 is 10.5℃, and the second temperature Ts2 can be appropriately adjusted within the range of 10.5℃-15℃.

[0060] Preferably, the third temperature Ts3 is 15.5℃, and the third temperature Ts3 can be appropriately adjusted within the range of 15.5℃-20℃.

[0061] It should be noted that dynamically adjusting the second preset temperature according to the temperature range in which the outdoor ambient temperature falls can better ensure that there is a sufficiently high outdoor heat exchanger temperature to defrost after the outdoor fan is started, thus improving the stability of the air conditioner's operation.

[0062] Understandably, the lower the outdoor ambient temperature falls within a certain temperature range, the more ice and frost accumulate on the outdoor heat exchanger 110 and its back mesh. A higher outdoor heat exchanger temperature is required to melt the ice and frost accumulated on the outdoor heat exchanger 110 and its back mesh after the outdoor fan is turned on. Therefore, the higher the second preset temperature is set, the higher the outdoor heat exchanger temperature will be before the outdoor fan is turned on at the first preset speed. This can prevent the outdoor heat exchanger temperature from dropping and losing its defrosting effect after the outdoor fan is turned on.

[0063] Furthermore, the higher the second preset temperature, the less rapidly the outdoor heat exchanger temperature will drop after the outdoor fan is turned on. This prevents the outdoor heat exchanger temperature from dropping below the second preset temperature due to the large air volume after the outdoor fan is turned on, thus avoiding frequent on / off switching of the outdoor fan. This improves the stability of equipment operation and extends the equipment's lifespan.

[0064] Furthermore, the lower the outdoor ambient temperature falls within the temperature range, the higher the second preset temperature, the higher the outdoor heat exchanger temperature, and the higher the ambient temperature of the outdoor fan near the outdoor heat exchanger 110, the more it can still operate at the first preset speed, thus preventing damage to the fan motor and other related components caused by operating in extremely low ambient temperatures.

[0065] According to some embodiments of the present application, the lower the outdoor ambient temperature falls within the temperature range, the lower the first preset rotation speed.

[0066] Specifically, when the outdoor ambient temperature is less than 0℃ and greater than or equal to -8℃, the first preset speed is the first speed Fs1; when the outdoor ambient temperature is less than -8℃ and greater than or equal to -15℃, the first preset speed is the second speed Fs2, which is less than the first speed Fs1; and when the outdoor ambient temperature is less than -15℃, the first preset speed is the third speed Fs3, which is less than the second speed Fs2.

[0067] It should be noted that dynamically adjusting the first preset speed according to the temperature range in which the outdoor ambient temperature falls can better ensure that there is a sufficiently high outdoor heat exchanger temperature to defrost after the outdoor fan is started, thus improving the stability of the air conditioner's operation.

[0068] Understandably, the lower the outdoor ambient temperature falls within a certain temperature range, the more ice and frost accumulate on the outdoor heat exchanger 110 and its back mesh. A higher outdoor heat exchanger temperature is required to melt the ice, snow, and frost accumulated on the outdoor heat exchanger 110 and its back mesh after the outdoor fan is turned on. The lower the first preset speed, the smaller the air volume blown out, and the less the outdoor heat exchanger temperature drops. This ensures that a certain amount of hot air is blown out, allowing the condenser to defrost normally.

[0069] Furthermore, the lower the first preset rotation speed, the less rapidly the outdoor heat exchanger temperature will drop. This prevents the outdoor heat exchanger temperature from dropping below the second preset temperature due to the large airflow after the outdoor fan is turned on, thus avoiding frequent on / off cycles of the outdoor fan. This improves the stability of equipment operation and extends the equipment's lifespan.

[0070] Furthermore, the lower the outdoor ambient temperature falls within the temperature range, the lower the first preset speed, which can prevent the outdoor fan from overworking at extreme low temperatures, thereby protecting the fan motor and other related components from damage.

[0071] According to some embodiments of the present application, the defrosting control method is provided such that the outdoor fan stops defrosting after blowing air onto the back net at a second preset speed for a preset duration.

[0072] Preferably, the preset duration is 3 minutes, and the preset duration can be appropriately adjusted within the range of 1 minute to 5 minutes.

[0073] Understandably, controlling the outdoor fan to blow air onto the back net at the second preset speed for the preset duration and then stopping defrosting can better ensure that the residual snow on the back net and the water droplets after the snow melts can be blown off.

[0074] According to some embodiments of the present application, the lower the outdoor ambient temperature falls within a certain temperature range, the longer the preset duration.

[0075] Understandably, different outdoor fan speeds and different preset durations when operating at the second preset speed, designed according to different outdoor ambient temperatures, can ensure that all the frost hanging on the heat exchanger fins and back mesh of the outdoor unit is removed, shorten the defrosting time, quickly restore the heating state, and improve the user experience.

[0076] Specifically, when the outdoor ambient temperature is less than 0℃ and greater than or equal to -8℃, the preset duration is the first duration; when the outdoor ambient temperature is less than -8℃ and greater than or equal to -15℃, the preset duration is the second duration, which is greater than the first duration; and when the outdoor ambient temperature is less than -15℃, the preset duration is the third duration, which is greater than the second duration.

[0077] Preferably, the first duration is 1 minute, and the first duration can be appropriately adjusted within the range of 1 minute to 2 minutes.

[0078] Preferably, the second duration is 2 minutes, and the second duration can be appropriately adjusted within the range of 2 minutes to 4 minutes.

[0079] Preferably, the third duration is 4 minutes, and the third duration can be appropriately adjusted within the range of 4 minutes to 5 minutes.

[0080] Understandably, the lower the outdoor ambient temperature falls within the temperature range, the more ice and frost accumulate on the outdoor heat exchanger 110 and the back screen. When the outdoor heat exchanger temperature rises above the defrosting exit temperature, the outdoor fan is controlled to blow air onto the back screen at a larger second preset speed. And when the outdoor fan blows air onto the back screen at the second preset speed for a longer preset time, the defrosting process is stopped to ensure that all the snow and water remaining on the back screen can be blown off.

[0081] It should be noted that in low-temperature environments, if the defrosting time is too short, residual moisture or ice crystals may remain on the surface of the outdoor heat exchanger 110. Long-term operation may accelerate the wear and aging of the equipment. By increasing the preset time, it can be ensured that the frost layer is completely removed, reducing the burden on the equipment and extending its service life.

[0082] The defrosting control method provided according to some embodiments of this application further includes:

[0083] When the outdoor ambient temperature is higher than the first preset temperature, the outdoor fan will be stopped.

[0084] When the outdoor heat exchanger temperature rises above the defrost exit temperature, defrosting is stopped.

[0085] Preferably, the first preset temperature is 0°C.

[0086] It should be noted that when the outdoor ambient temperature is above 0℃, the likelihood of frost or ice formation is low. In this case, stopping the outdoor fan can save electricity, reduce energy consumption, and also reduce the noise generated during system operation, thus improving the user experience.

[0087] Furthermore, when the outdoor heat exchanger temperature rises above the defrost exit temperature, it indicates that the defrosting process has been completed and the frost or ice on the outdoor heat exchanger 110 has been removed. Exiting the defrost state at this time ensures that the air conditioner can quickly return to the heating mode and continue to provide users with a comfortable indoor environment.

[0088] To more clearly illustrate the refrigerant leakage detection method of this application, a comprehensive and detailed description is provided below using three specific embodiments.

[0089] Firstly:

[0090] Referring to Figure 3, another defrosting control method for an air conditioner provided in this application embodiment includes steps S410-S480:

[0091] Step S410: When the preset defrosting conditions are met, control the four-way valve 220 to switch to the state of connecting the exhaust port of the compressor 230 and the outdoor heat exchanger 110, and obtain the outdoor ambient temperature and the outdoor heat exchanger temperature.

[0092] Step S420: Determine whether the outdoor ambient temperature is lower than the first preset temperature. If yes, proceed to step S430; otherwise, proceed to step S470.

[0093] Step S430: When the outdoor ambient temperature is less than 0℃ and greater than or equal to -8℃, and the outdoor heat exchanger temperature is less than the first temperature Ts1, control the outdoor fan to stop.

[0094] Among them, the first temperature Ts1 is greater than 5℃.

[0095] Step S440: When the outdoor heat exchanger temperature rises to a level greater than or equal to the first temperature Ts1, control the outdoor fan to blow air onto the back mesh at a first speed Fs1.

[0096] Step S450: When the outdoor heat exchanger temperature rises above the defrost exit temperature, control the outdoor fan to blow air onto the back mesh at the second preset speed;

[0097] Step S460: After the outdoor fan blows air onto the back net at the second preset speed for the first duration, the defrosting process is terminated.

[0098] The second preset speed is greater than the first speed Fs1.

[0099] or,

[0100] Step S470: When the outdoor ambient temperature is greater than 0℃, control the outdoor fan to stop and jump to step S480;

[0101] Step S480: When the outdoor heat exchanger temperature rises above the defrost exit temperature, defrost is terminated.

[0102] Secondly:

[0103] Referring to Figure 4, an embodiment of this application provides another defrosting control method for an air conditioner, including steps S510-S550:

[0104] Step S510: When the preset defrosting conditions are met, control the four-way valve 220 to switch to the state of connecting the exhaust port of the compressor 230 and the outdoor heat exchanger 110, and obtain the outdoor ambient temperature and the outdoor heat exchanger temperature.

[0105] Step S520: When the outdoor ambient temperature is less than -8℃ and greater than or equal to -15℃, and the outdoor heat exchanger temperature is less than the second temperature Ts2, control the outdoor fan to stop.

[0106] Step S530: When the outdoor heat exchanger temperature rises to a level greater than or equal to the second temperature Ts2, control the outdoor fan to blow air onto the back mesh at the second speed Fs2.

[0107] Step S540: When the temperature of the outdoor heat exchanger rises above the defrost exit temperature, control the outdoor fan to blow air onto the back mesh at the second preset speed;

[0108] Step S550: After the outdoor fan blows air onto the back net at the second preset speed for the second duration, the defrosting process is terminated.

[0109] The second preset speed is greater than the second speed Fs2.

[0110] Thirdly:

[0111] Referring to Figure 5, an embodiment of this application provides another defrosting control method for an air conditioner, including steps S610-S650:

[0112] Step S610: When the preset defrosting conditions are met, control the four-way valve 220 to switch to the state of connecting the exhaust port of the compressor 230 and the outdoor heat exchanger 110, and obtain the outdoor ambient temperature and the outdoor heat exchanger temperature.

[0113] Step S620: When the outdoor ambient temperature is less than -15℃ and the outdoor heat exchanger temperature is less than the third temperature Ts3, control the outdoor fan to stop.

[0114] Step S630: When the outdoor heat exchanger temperature rises to a level greater than or equal to the third temperature Ts3, control the outdoor fan to blow air onto the back mesh at the third speed Fs3.

[0115] Step S640: When the temperature of the outdoor heat exchanger rises above the defrost exit temperature, control the outdoor fan to blow air onto the back mesh at the second preset speed;

[0116] Step S650: After the outdoor fan blows air onto the back net at the second preset speed for a period of time that reaches the third duration, the defrosting process is terminated;

[0117] The second preset speed is greater than the third speed Fs3.

[0118] Referring to FIG6, in a second aspect, an embodiment of this application provides an operation control device 700, including a memory 710, a processor 720, and a computer program stored in the memory 710 and executable on the processor 720. The processor executes the program to implement the defrosting control method of the air conditioner as described in the first aspect embodiment above.

[0119] Thirdly, embodiments of this application provide an air conditioner including the operation control device 700 as described in the second aspect embodiment above.

[0120] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions for causing a computer to perform the defrosting control method of an air conditioner as described in the first aspect embodiment above.

[0121] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which may include computer storage media or non-transitory media and communication media or transient media. As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information such as computer-readable instructions, data structures, program modules, or other data. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc DVD or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0122] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A defrosting control method for an air conditioner, wherein, The outdoor unit of the air conditioner is equipped with a back mesh located outside the outdoor heat exchanger, and the method includes: When the preset defrosting conditions are met, the four-way valve is controlled to switch to the state of connecting the compressor's exhaust port and the outdoor heat exchanger, and the outdoor ambient temperature and the outdoor heat exchanger temperature are obtained. When the outdoor ambient temperature is lower than the first preset temperature and the outdoor heat exchanger temperature is lower than the second preset temperature, the outdoor fan is controlled to stop. When the temperature of the outdoor heat exchanger rises to a level greater than or equal to the second preset temperature, the outdoor fan is controlled to blow air onto the back mesh at a first preset speed; and When the temperature of the outdoor heat exchanger rises above the defrost exit temperature, the outdoor fan is controlled to blow air onto the back mesh at a second preset speed; and Wherein, the first preset speed is less than the second preset speed.

2. The defrosting control method according to claim 1, wherein, The lower the outdoor ambient temperature falls within the specified temperature range, the higher the second preset temperature.

3. The defrosting control method according to claim 2, wherein, When the outdoor ambient temperature is less than 0°C and greater than or equal to -8°C, the second preset temperature is a first temperature greater than 5°C; when the outdoor ambient temperature is less than -8°C and greater than or equal to -15°C, the second preset temperature is a second temperature greater than the first temperature. And when the outdoor ambient temperature is less than -15°C, the second preset temperature is a third temperature that is greater than the second temperature.

4. The defrosting control method according to any one of claims 1 to 3, wherein, The lower the outdoor ambient temperature falls within the specified temperature range, the lower the first preset rotation speed.

5. The defrosting control method according to claim 4, wherein, When the outdoor ambient temperature is less than 0℃ and greater than or equal to -8℃, the first preset speed is the first speed; when the outdoor ambient temperature is less than -8℃ and greater than or equal to -15℃, the first preset speed is the second speed, which is less than the first speed. And when the outdoor ambient temperature is less than -15℃, the first preset speed is a third speed which is less than the second speed.

6. The defrosting control method according to any one of claims 1 to 5, wherein, The outdoor fan stops defrosting after blowing air onto the back mesh at a second preset speed for a preset duration.

7. The defrosting control method according to claim 6, wherein, The lower the temperature range that the outdoor ambient temperature falls into, the longer the preset duration.

8. The defrosting control method according to claim 7, wherein, When the outdoor ambient temperature is less than 0℃ and greater than or equal to -8℃, the preset duration is a first duration; when the outdoor ambient temperature is less than -8℃ and greater than or equal to -15℃, the preset duration is a second duration greater than the first duration. And when the outdoor ambient temperature is less than -15°C, the preset temperature is a third duration that is greater than the second duration.

9. The defrosting control method according to any one of claims 1 to 8, further comprising: When the outdoor ambient temperature is greater than the first preset temperature, the outdoor fan is controlled to stop. as well as When the temperature of the outdoor heat exchanger rises above the defrost exit temperature, defrosting is stopped.

10. An operation control device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the defrosting control method for an air conditioner as claimed in any one of claims 1 to 9.

11. An air conditioner comprising the operation control device as described in claim 10.

12. A computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to cause a computer to perform the defrosting control method for an air conditioner as described in any one of claims 1 to 9.

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