Air conditioner self-cleaning method and device, computer readable storage medium and air conditioner

Abstract

The invention relates to the technical field of air conditioner cleaning, and discloses an air conditioner self-cleaning method which comprises the steps that in response to a self-cleaning starting instruction of an air conditioner, the air conditioner is controlled to enter an indoor unit frosting and defrosting mode so as to conduct frosting and defrosting cleaning on an indoor heat exchanger in sequence; after the indoor unit frosting and defrosting mode is executed, the air conditioner is controlled to enter an outdoor unit frosting and defrosting mode, so that an outdoor heat exchanger is sequentially subjected to frosting and defrosting cleaning; and after the outdoor unit frosting and defrosting mode is executed, the air conditioner is controlled to enter an indoor unit high-temperature mode so as to conduct high-temperature cleaning on the indoor heat exchanger. According to the self-cleaning method of the air conditioner, the high-humidity adverse effect of the self-cleaning function of the air conditioner on the indoor unit can be effectively reduced, the dryness of the indoor unit is kept, and the problem of mold breeding caused by the wet environment of the indoor unit is solved. The invention further discloses an air conditioner self-cleaning device, a computer readable storage medium and an air conditioner.

Description

Technical Field

[0001] This application relates to the field of air conditioning cleaning technology, such as a method, apparatus, computer-readable storage medium, and air conditioner for self-cleaning an air conditioner. Background Technology

[0002] As users become increasingly concerned about air quality and environmental health, self-cleaning technology for air conditioner heat exchangers is attracting more and more attention from manufacturers. The basic working principle of this self-cleaning technology is as follows: by operating the air conditioner in cooling mode, water vapor gradually condenses into frost on the heat exchanger. This frost can peel dust off the surface of the heat exchanger. Then, by switching the air conditioner to heating mode, the frost that condensed in the previous stage melts, washing away the dust along with it. This significantly reduces the amount of dust accumulated on the heat exchanger, resulting in cleaner air from the air conditioner.

[0003] In addition to self-cleaning methods for indoor air conditioner units, some manufacturers have also introduced self-cleaning functions for both indoor and outdoor units. This function targets the indoor and outdoor heat exchangers for cleaning, performing the aforementioned defrosting and condensing process on each heat exchanger in sequence. This not only removes pollutants from the indoor unit but also provides a good cleaning effect for the outdoor unit, which is installed on the outdoor side for a long time and has accumulated more pollutants.

[0004] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0005] Regarding the self-cleaning process of the indoor and outdoor units of the air conditioner, during the defrosting stage of the outdoor unit, the indoor heat exchanger is in a cooling state, which makes it easy for water vapor to re-condense on the indoor heat exchanger and increase the humidity inside the indoor unit. This is not conducive to achieving the drying and mold prevention requirements of the indoor unit.

[0006] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0007] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0008] This disclosure provides a method, apparatus, computer-readable storage medium, and air conditioner for self-cleaning, in order to solve the technical problem that the self-cleaning process of the outdoor unit of an existing air conditioner increases the humidity of the indoor unit and makes it easy for mold to grow.

[0009] According to a first aspect of the present invention, a method for self-cleaning an air conditioner is provided, comprising:

[0010] In response to the air conditioner's self-cleaning start command, the air conditioner is controlled to enter the indoor unit's defrosting mode to perform defrosting and cleaning of the indoor heat exchanger.

[0011] After completing the indoor unit's defrosting mode, the air conditioner is switched to the outdoor unit's defrosting mode to perform defrosting and cleaning of the outdoor heat exchanger.

[0012] After completing the outdoor unit's defrosting mode, the air conditioner is switched to the indoor unit's high-temperature mode to perform high-temperature cleaning of the indoor heat exchanger.

[0013] In some embodiments, controlling the air conditioner to enter the indoor unit high-temperature mode includes:

[0014] Control the air conditioner to operate in heating mode and adjust the operating parameters of one or more components, including the indoor fan, outdoor fan, compressor, and throttling device, so that the indoor heat exchanger is at the preset high-temperature sterilization temperature T. 高温 And maintain the preset sterilization time t 杀菌 ;

[0015] Among them, T 高温 The value range is 56–60℃, and / or, t 杀菌 The value range is 30 to 60 minutes.

[0016] In some embodiments, before controlling the air conditioner to enter the indoor unit high-temperature mode, the method further includes:

[0017] Obtain the first ambient temperature parameter; the first ambient temperature parameter includes the first indoor temperature T1. 室内 and / or the first outdoor temperature T1 室外 ;

[0018] If the first ambient temperature parameter does not meet the over-temperature protection conditions, the air conditioner will be controlled to enter the indoor unit high-temperature mode; the over-temperature protection conditions include: T1 室内 ≥T1 室内阈值 Or, T1 室外 ≥T1 室外阈值 ;

[0019] T1 室内阈值 T1 is the first indoor temperature threshold. 室外阈值 This is the second outdoor temperature threshold.

[0020] In some embodiments, prior to defrosting the outdoor heat exchanger, the method further includes:

[0021] Check the dryness of the surface of the indoor heat exchanger;

[0022] If the surface dryness of the indoor heat exchanger does not meet the first drying condition, the condensation time of the outdoor heat exchanger shall be extended.

[0023] In some embodiments, the dryness of the surface of the indoor heat exchanger is detected.

[0024] Obtain the second operating parameters of the air conditioner and its corresponding second ambient temperature parameters; the second operating parameters include the compressor's second frequency F2 and the indoor heat exchanger's second inner coil temperature T2. 内盘管 The second ambient temperature parameter includes the second indoor temperature T1. 室内 Second outdoor temperature T2 室外 ;

[0025] The dryness state of the indoor heat exchanger surface is determined from the preset correlation based on the second operating parameter and the second ambient temperature parameter.

[0026] In some embodiments, the air conditioner has a moisture sensor disposed in the indoor unit, configured to detect moisture information on the surface of the indoor heat exchanger;

[0027] Detecting the dryness of the indoor heat exchanger surface includes: acquiring moisture information detected by a moisture sensor, and determining the dryness of the indoor heat exchanger surface based on the moisture information.

[0028] In some embodiments, prior to defrosting the outdoor heat exchanger, the method further includes:

[0029] Obtain the third operating parameter of the air conditioner; the third operating parameter includes the third indoor coil temperature T3 of the indoor heat exchanger. 内盘管 and / or the third outlet air temperature T3 出风 ;

[0030] The second drying condition is determined based on the third working parameter; wherein, the second drying condition includes: T3 内盘管 ≥T3 内盘管阈值 Or, T3 出风 ≥T3 出风阈值 .

[0031] In some embodiments, prior to defrosting the outdoor heat exchanger, the method further includes:

[0032] Obtain the third ambient temperature parameter; the third ambient temperature parameter includes the third outdoor temperature T3. 室外 ;

[0033] If T3 室外 ≥T3 室外阈值 Then, the outdoor heat exchanger will be defrosted using the ventilation mode.

[0034] If T3 室外 <T3 室外阈值Then, the outdoor heat exchanger is defrosted using the reverse circulation mode.

[0035] Among them, T3 室外阈值 This is the third outdoor temperature threshold.

[0036] According to a second aspect of the present invention, an air conditioner self-cleaning apparatus is provided, comprising a processor and a memory storing program instructions, the processor being configured to execute an air conditioner self-cleaning method as described in any embodiment of the first aspect when the program instructions are executed.

[0037] According to a third aspect of the present invention, a computer-readable storage medium is provided storing program instructions that, when executed, cause a computer to perform an air conditioner self-cleaning method as described in any embodiment of the first aspect.

[0038] According to a fourth aspect of the present invention, an air conditioner is provided, comprising an air conditioner body and an air conditioner self-cleaning device as described in the second aspect embodiment.

[0039] The air conditioner self-cleaning method, apparatus, computer-readable storage medium, and air conditioner provided in this disclosure can achieve the following technical effects:

[0040] The air conditioner self-cleaning method provided in this embodiment performs defrosting and self-cleaning operations on the indoor unit and the outdoor unit respectively. After the outdoor unit defrosts, the indoor unit is dried and sterilized using the high-temperature mode of the indoor unit. This can effectively reduce the adverse effects of the high humidity generated by the air conditioner self-cleaning function on the indoor unit, maintain the dryness of the indoor unit, and reduce the problem of mold growth caused by the humid environment of the indoor unit.

[0041] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0042] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0043] Figure 1 This is a schematic flowchart of an air conditioner self-cleaning method provided in an embodiment of this disclosure;

[0044] Figure 2 This is a schematic flowchart of another air conditioner self-cleaning method provided in this embodiment of the disclosure;

[0045] Figure 3 This is a schematic flowchart of another air conditioner self-cleaning method provided in this embodiment of the disclosure;

[0046] Figure 4 This is a schematic flowchart of another air conditioner self-cleaning method provided in this embodiment of the disclosure;

[0047] Figure 5 This is a schematic diagram of an air conditioner self-cleaning device provided in an embodiment of this disclosure. Detailed Implementation

[0048] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0049] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0050] Unless otherwise stated, the term "multiple" means two or more.

[0051] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0052] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0053] The term "correspondence" can refer to an association or binding relationship. The correspondence between A and B means that there is an association or binding relationship between A and B.

[0054] Figure 1 This is a schematic flowchart of an air conditioner self-cleaning method provided in an embodiment of the present disclosure.

[0055] Combination Figure 1 As shown, this application provides a method for self-cleaning an air conditioner. This method can clean contaminants from the surfaces of indoor and outdoor heat exchangers while reducing the adverse effects of the outdoor unit cleaning process on the indoor unit, such as increased internal humidity and increased mold growth. Specifically, the main steps of this air conditioner self-cleaning method include:

[0056] S11. In response to the air conditioner's self-cleaning start command, control the air conditioner to enter the indoor unit's defrosting mode to perform defrosting and cleaning of the indoor heat exchanger.

[0057] In this embodiment, the self-cleaning start command is used to instruct the air conditioner to enter the self-cleaning function mode.

[0058] Optionally, the self-cleaning start command for the air conditioner can be issued by the user. For example, the user can issue a self-cleaning start command by triggering a function button (including mechanical buttons, touch buttons, etc.) on the corresponding operating area of ​​the remote control or the air conditioner itself, such as the "self-cleaning" function button. Alternatively, the user can issue the self-cleaning start command to the air conditioner via a mobile application connected to a home Wi-Fi network or a mobile network (4G, 5G, etc.). Here, the mobile terminal can be a mobile phone, tablet, or other similar device, and the application can be a self-developed application by the air conditioner manufacturer, or it can be an application from a third-party platform, such as Xiaomi's "Mi Home" app or Apple's "HomeKit" app.

[0059] Alternatively, the self-cleaning start command can also be a control command automatically generated by the air conditioner's built-in program. For example, the air conditioner may have a built-in self-cleaning timed start program, which may be preset to automatically start and perform the self-cleaning function once a month in cooling mode; or, the air conditioner may have an internal environment self-check function that can detect the degree of dirt and clogging in the heat exchanger and set the air conditioner to automatically start and perform the self-cleaning function when the current degree of dirt and clogging in the heat exchanger is relatively serious.

[0060] In some optional embodiments, the indoor unit defrosting mode includes an indoor unit defrosting stage and an indoor unit defrosting stage.

[0061] During the indoor unit defrosting phase, the air conditioner is controlled to operate in a cooling direction, causing the indoor heat exchanger to cool down and condense frost on its surface. In some optional embodiments, during the indoor unit defrosting phase, the compressor is controlled to operate at frequency f2, the electronic expansion valve is controlled to operate at opening p2, and the indoor fan is controlled to operate at a low speed or be turned off, so that the surface temperature of the indoor heat exchanger is reduced below the indoor frost point temperature, allowing water vapor or droplets to gradually condense on the surface of the indoor heat exchanger. Optionally, the frequency f2 ranges from 60 to 80 Hz, and the opening p2 ranges from 130 to 150 Hz.

[0062] Furthermore, during the indoor unit defrosting stage, two methods can be selected: heating defrosting or ventilation defrosting. Heating defrosting involves controlling the air conditioner to operate in heating mode, raising the temperature of the indoor heat exchanger, which melts the frost condensed on its surface into liquid water. Alternatively, ventilation defrosting involves stopping the compressor or operating it at a low frequency, while controlling the indoor fan to run at a medium or high speed. This allows a continuous and large amount of indoor air to flow into the indoor unit and exchange heat with the frost layer, thus using the heat from the ambient indoor air to melt the frost condensed on the indoor heat exchanger. The optional duration of ventilation defrosting is 10–60 seconds.

[0063] In some embodiments, the indoor unit defrosting and condensation stages are switched using a low-pressure-difference, non-stop reversing operation to increase system stability during refrigerant flow switching. Specifically, after the indoor unit defrosting stage is completed, the compressor frequency is reduced to frequency f3, and a transition time is continuously set. This reduces the amount of refrigerant circulating and lowers the system pressure. Optionally, the frequency f3 ranges from 20 to 40 Hz, and the transition time ranges from 1 to 3 minutes.

[0064] Furthermore, the compressor reduces its frequency at a first frequency reduction rate v. Optionally, the first frequency reduction rate is 1 Hz / s. By adopting the above frequency reduction rate, the air conditioning system pressure can be reduced more stably, reducing system pressure fluctuations during the frequency reduction process and preventing excessive local pressure in the air conditioning circulation loop.

[0065] In some alternative embodiments, the indoor unit defrosting mode also includes an indoor unit condensation phase. This condensation phase occurs before the indoor unit defrosting phase and increases the amount of water on the surface of the indoor heat exchanger, thereby increasing the amount of condensation in the subsequent indoor unit defrosting phase and improving the cleaning effect on contaminants.

[0066] Specifically, during the condensation phase of the indoor unit, the air conditioner is controlled to operate in heating mode, the compressor's operating frequency is adjusted to f1, the electronic expansion valve's opening is adjusted to p1, and the indoor fan speed is set to a low setting. This causes the surface temperature of the indoor heat exchanger to drop below the dew point temperature, and the water vapor in the air gradually condenses into liquid water droplets on the surface of the indoor heat exchanger. Optionally, the frequency f1 ranges from 60 to 80 Hz, the opening p1 ranges from 130 to 150 Hz, and the duration of the indoor unit's condensation phase is 1 to 30 minutes.

[0067] In some alternative embodiments, the indoor unit's defrosting mode can also adopt the defrosting parameter setting form known in the related art, and this application does not limit this.

[0068] S12. After completing the indoor unit defrosting mode, control the air conditioner to enter the outdoor unit defrosting mode to perform defrosting and cleaning of the outdoor heat exchanger.

[0069] In some optional embodiments, the completion of the indoor unit defrosting mode is determined based on the mode running time. For example, if the mode running time of the indoor unit defrosting mode is set to 15 minutes, the air conditioner starts timing after entering the indoor unit defrosting mode. When the time reaches the set mode running time of 15 minutes, the indoor unit defrosting mode is determined to be completed, and the indoor unit cleaning is finished.

[0070] In some optional embodiments, the outdoor unit defrosting mode includes an outdoor unit defrosting stage and an outdoor unit defrosting stage.

[0071] During the outdoor unit defrosting phase, the air conditioner is controlled to operate in heating mode, while the outdoor heat exchanger is in cooling mode, allowing frost to condense on its surface. In some optional embodiments, during the outdoor unit defrosting phase, the compressor is controlled to operate at frequency f5, the electronic expansion valve at opening p5, and the outdoor fan at a low speed, lowering the surface temperature of the outdoor heat exchanger below the outdoor frost point temperature, allowing water vapor or droplets in the outdoor air to gradually condense on the indoor heat exchanger surface. Optionally, the frequency f5 ranges from 50 to 70 Hz, and the opening p5 ranges from 400 to 420.

[0072] In this embodiment, compared to the indoor unit's defrosting stage, the compressor frequency f5 during the outdoor unit's defrosting stage is generally lower than its compressor frequency f2. This reduces the compressor's intake and exhaust volumes, preventing excessive heat release from the refrigerant on the indoor side during heating flow, which could significantly disrupt the indoor temperature balance and affect indoor temperature stability and comfort. Simultaneously, the opening degree p5 of the electronic expansion valve during the outdoor unit's defrosting stage is generally higher than its opening degree p2, thereby accelerating the refrigerant flow from the indoor heat exchanger to the outdoor heat exchanger, further reducing the adverse effects of the heating flow on the indoor environment.

[0073] Furthermore, during the outdoor unit defrosting stage, two methods can be selected: reverse circulation defrosting or ventilation defrosting. Reverse circulation defrosting controls the air conditioner to operate in a cooling direction, while the outdoor heat exchanger heats up, melting the frost condensed on its surface into liquid water. Alternatively, ventilation defrosting stops the compressor or operates it at a low frequency, while the outdoor fan operates at a medium or high speed. This allows a continuous and large amount of outdoor air to flow into the outdoor unit and exchange heat with the frost layer, using the heat from the outdoor ambient air to melt the frost condensed on the outdoor heat exchanger.

[0074] Similarly, the outdoor unit's defrosting mode also includes a condensation phase. This condensation phase occurs before the defrosting phase and increases the water volume in the outdoor heat exchanger, thereby increasing the amount of condensate produced during the subsequent defrosting phase and improving the cleaning efficiency of pollutants from the outdoor unit.

[0075] Specifically, during the condensation phase of the outdoor unit, the air conditioner is controlled to operate in heating mode, the compressor's operating frequency is adjusted to f4, the electronic expansion valve's opening is adjusted to p4, and the outdoor fan speed is set to a low setting. This lowers the surface temperature of the outdoor heat exchanger to below the outdoor dew point temperature, causing water vapor in the outdoor air to gradually condense into liquid water droplets on the surface of the outdoor heat exchanger. Optionally, the frequency f4 can range from 50 to 70 Hz, the opening p4 from 460 to 480 Hz, and the duration of the indoor unit's condensation phase can be 1 to 30 minutes.

[0076] S13. After completing the outdoor unit's defrosting mode, control the air conditioner to enter the indoor unit's high-temperature mode to perform high-temperature cleaning of the indoor heat exchanger.

[0077] In some optional embodiments, similar to the above, the completion of the outdoor unit defrosting mode is also determined based on the mode running time. For example, the mode running time of the outdoor unit defrosting mode is set to 25 minutes. The outdoor unit air conditioner starts timing after entering the outdoor unit defrosting mode. When the time reaches the set mode running time of 25 minutes, it is determined that the outdoor unit defrosting mode is completed and the outdoor unit cleaning is finished.

[0078] In some optional embodiments, the indoor unit high-temperature mode is executed, which may be a heating mode, an auxiliary heating mode, or a hybrid mode combining the two.

[0079] Specifically, when the indoor unit is in high-temperature mode in heating mode, the air conditioner is controlled to operate in heating direction, and the operating parameters of one or more components such as indoor fan, outdoor fan, compressor and throttling device are adjusted so that the air conditioner heat exchanger can be at the preset high-temperature sterilization temperature.

[0080] Optionally, the heat loss from the heat exchanger can be reduced by lowering the indoor fan speed or turning off the indoor fan; and by increasing the outdoor fan speed, the heat exchange between the outdoor heat exchanger and the outdoor environment can be increased, increasing the heat absorbed by the air conditioner from the outdoor environment, thereby increasing the heat supplied to the indoor heat exchanger; and by increasing the compressor's operating frequency, increasing the compressor's intake and exhaust volume, the heat supplied to the indoor heat exchanger and the heating efficiency can also be increased; and by reducing the opening of the throttling device (electronic expansion valve), the throttling effect of the throttling device can be increased, thereby enhancing the heat absorption efficiency of the outdoor heat exchanger, and so on. This application is not limited to these.

[0081] In this embodiment, the auxiliary heating mode is applicable to air conditioner models with an electric auxiliary heating module in the indoor unit. When the indoor unit is in high-temperature mode using the auxiliary heating mode, the air conditioner heat exchanger can also reach the preset high-temperature sterilization temperature by controlling the operation of the electric auxiliary heating mode and adjusting its heating power.

[0082] The air conditioner self-cleaning method provided in this embodiment performs defrosting and self-cleaning operations on the indoor unit and the outdoor unit respectively. After the outdoor unit defrosts, the indoor unit is dried and sterilized using the high-temperature mode of the indoor unit. This can effectively reduce the adverse effects of the high humidity generated by the air conditioner self-cleaning function on the indoor unit, maintain the dryness of the indoor unit, and reduce the problem of mold growth caused by the humid environment of the indoor unit.

[0083] In the preceding embodiments, a preset high-temperature sterilization temperature T 高温 The value range is 56–60℃. Optionally, the preset high-temperature sterilization temperature T... 高温 The values ​​range from 56℃, 57℃, 57.5℃, 58℃, 60℃, and so on. This T... 高温 The numerical settings can further improve the dryness of the indoor heat exchanger and the internal environment of the indoor unit, accelerate the dehumidification, and at the same time play a role in high-temperature sterilization and disinfection, taking advantage of the fact that mold is not heat-resistant to achieve the effect of killing mold.

[0084] In some optional embodiments, the indoor unit's high-temperature mode operates for a preset sterilization duration. After the actual operating time of the indoor unit's high-temperature mode reaches the preset sterilization duration, the high-temperature mode ends, and the air conditioner can exit the self-cleaning process. Optionally, the preset sterilization duration t... 杀菌 The value range is 30 to 60 minutes, such as 30 minutes, 35 minutes, 45 minutes, 50 minutes, or 60 minutes, etc.

[0085] Here, the indoor unit's high-temperature mode should run for no less than 30 minutes to ensure that the high-temperature heat can be evenly distributed in the indoor unit, enhancing the overall sterilization effect of the indoor unit; at the same time, the running time should not exceed 60 minutes to avoid the indoor unit's high-temperature mode running for too long and causing too much impact on the stability of the indoor temperature.

[0086] In some alternative embodiments, when indoor and outdoor ambient temperatures are relatively high, prolonged operation of the air conditioner's self-cleaning function may adversely affect system pressure and compressor safety, such as causing excessively high compressor body temperature and excessive load. This is especially true for the high-temperature mode of the indoor unit executed after cleaning the indoor and outdoor units, which may further reduce the compressor's operational safety. In view of the above, combined with... Figure 2 As shown, this application also provides a method for self-cleaning an air conditioner, the main steps of which include:

[0087] S21. In response to the air conditioner's self-cleaning start command, control the air conditioner to enter the indoor unit's defrosting mode to perform defrosting and cleaning of the indoor heat exchanger.

[0088] S22. After completing the indoor unit defrosting mode, control the air conditioner to enter the outdoor unit defrosting mode to perform defrosting and cleaning of the outdoor heat exchanger.

[0089] In some optional embodiments, the specific implementation of steps S21 and S22 can be referred to the previous embodiments, and will not be repeated here.

[0090] S23. After completing the outdoor unit defrosting mode, obtain the first ambient temperature parameter;

[0091] In some embodiments, the first ambient temperature parameter includes a first indoor temperature T1. 室内 Optionally, the indoor unit of the air conditioner is equipped with a temperature sensor configured to detect the real-time temperature of the indoor area corresponding to the indoor unit.

[0092] In some other embodiments, the first ambient temperature parameter includes a first outdoor temperature T1. 室外 Optionally, the outdoor unit of the air conditioner is equipped with a temperature sensor configured to detect the real-time temperature of the outdoor area corresponding to the outdoor unit.

[0093] In some alternative embodiments, the first ambient temperature parameter includes a first indoor temperature T1. 室内 and the first outdoor temperature T1 室外 Optionally, the air conditioner may have a temperature sensor installed in both the indoor and outdoor units, and the two temperature sensors may be configured to detect the real-time temperature of the indoor and outdoor areas, respectively.

[0094] S24. Determine whether the over-temperature protection condition is met based on the first ambient temperature parameter. If not, proceed to step S25. If it is met, proceed to step S26.

[0095] Optionally, the first ambient temperature parameter is the first indoor temperature T1. 室内 In this case, the over-temperature protection condition is set to: "T1" 室内 ≥T1 室内阈值 "Among them, T1" 室内阈值 The first indoor temperature threshold is defined as 26–30℃.

[0096] Alternatively, the first environmental parameter is the first outdoor temperature T1. 室外 In this case, the over-temperature protection condition is set to: "T1" 室外 ≥T1 室外阈值 "Among them, T1" 室外阈值 The first outdoor temperature threshold is 26 to 30°C.

[0097] Alternatively, the first environmental parameter may include the first indoor temperature T1.室内 and the first outdoor temperature T1 室外 With two parameters, the over-temperature protection condition is set to meet any of the following conditions: "①T1 室内 ≥T1 室内阈值 ; ②T1 室外 ≥T1 室外阈值 ".

[0098] In some alternative embodiments, the temperature threshold (including the first indoor temperature threshold T1) in the over-temperature protection condition 室内阈值 and / or the first outdoor temperature threshold T1 室外阈值 The defrosting parameters are determined based on the relevant operating parameters of the outdoor unit's defrosting mode. Optionally, these parameters may include the compressor operating frequency for defrosting and the defrosting duration.

[0099] Here, during the outdoor unit's defrosting mode, the outdoor heat exchanger functions as an evaporator during the defrosting phase, while the indoor heat exchanger functions as a condenser. The indoor heat exchanger needs to release heat to the outside. To avoid excessive impact on indoor temperature, heat exchange between the indoor heat exchanger and the indoor environment is typically reduced by decreasing indoor fan speeds and closing indoor unit air deflectors. This results in a significant amount of heat remaining inside the air conditioner, accumulating within the refrigerant. Furthermore, during the outdoor unit's defrosting phase, especially when using ventilation defrosting, the heat still lacks sufficient release pathways, potentially leading to excessive system pressure and affecting the overall safety of the unit's operation. Under these circumstances, if the indoor unit continues to operate in high-temperature mode, the system pressure may further increase, easily triggering system safety protection and causing a shutdown.

[0100] Therefore, this embodiment sets the temperature threshold based on the relevant parameters of the outdoor unit's defrosting mode. When these parameters indicate that the outdoor unit's defrosting mode may accumulate a lot of pressure (heat), the temperature threshold in the over-temperature protection condition is set to a smaller value to more easily determine whether the over-temperature protection condition is met, thereby avoiding excessive heat accumulation between the system's internal and external systems due to the execution of the indoor unit's high-temperature protection mode. Conversely, when these parameters indicate that the outdoor unit's defrosting mode may accumulate a little pressure (heat), the temperature threshold in the over-temperature protection condition is set to a larger value to meet the requirements for high-temperature dehumidification and sterilization of the indoor unit.

[0101] For example, the air conditioner has a preset association relationship that characterizes the correspondence between relevant parameters of the outdoor unit's defrosting mode and temperature thresholds. This association relationship is shown in Table 1 below:

[0102] Table 1

[0103]

[0104] In the exemplary relationships given in Table 1, T1 室内阈值 It is negatively correlated with the operating frequency f5 and negatively correlated with the outdoor unit defrosting duration t5; and / or, T1 室外阈值 It is negatively correlated with the operating frequency f5 and negatively correlated with the outdoor unit defrosting duration t5.

[0105] S25. Control the air conditioner to enter the high-temperature mode of the indoor unit to perform high-temperature cleaning of the indoor heat exchanger.

[0106] In some optional embodiments, the specific implementation of step S25 can be referred to the previous embodiments, and will not be repeated here.

[0107] Furthermore, after completing step S25, which involves high-temperature cleaning of the indoor heat exchanger, the air conditioner can be controlled to exit the self-cleaning process.

[0108] S26. Control the air conditioner to exit the self-cleaning process.

[0109] The air conditioner self-cleaning method provided in this embodiment detects the ambient temperature of the indoor and outdoor environments before the air conditioner executes the indoor unit high-temperature cleaning mode, and determines whether the air conditioner is suitable for executing the indoor unit high-temperature cleaning mode based on the ambient temperature, thereby avoiding the adverse effects that the indoor unit high-temperature cleaning mode may have on the air conditioning system pressure and the overall safety of the unit.

[0110] In some alternative embodiments, also considering that the self-cleaning function of the air conditioner may have an adverse effect on the system pressure and compressor safety during long-term operation, the judgment and control can be made directly based on the relevant parameters of the outdoor unit's defrosting mode.

[0111] For example, before controlling the air conditioner to enter the indoor unit high temperature mode, relevant parameters of the outdoor unit defrosting mode can be obtained. These parameters include, but are not limited to, the compressor operating frequency f5 for outdoor unit defrosting and the outdoor unit defrosting duration t5. If the air conditioner's internal pressure (temperature) is high based on the relevant parameters, it is determined not to execute the indoor unit high temperature mode. However, if the air conditioner's internal pressure (temperature) is high based on the relevant parameters, it can be controlled to execute the indoor unit high temperature mode.

[0112] Here, a relevant frequency threshold f5 can be preset. 阈值 Frosting duration threshold t5 阈值 The threshold parameter is compared with the relevant parameters of the outdoor unit's defrosting mode, and the compressor operating frequency f5≥f5 is used. 阈值 And / or outdoor unit defrosting time t5 ≥ t5 阈值 In the case of [condition], the indoor unit high temperature mode will not be executed; otherwise, the indoor unit high temperature mode will be executed.

[0113] In some optional embodiments, to reduce the impact of the air conditioner's self-cleaning process on the indoor environment, measures such as controlling the indoor fan speed to low or stopping it, and reducing the size of the indoor unit's air guide vanes are generally used during the indoor unit defrosting and outdoor unit condensation stages to reduce the contact between indoor air and the indoor unit. This results in some residual melted frost water on the surface of the indoor heat exchanger, and the indoor unit's internal humidity is relatively high. This not only affects the dryness of the indoor unit's internal environment, but also, under the indoor unit's high-temperature mode, the residual moisture consumes some heat, thus affecting the high-temperature sterilization effect. In response to the above situation, combined with... Figure 3 As shown, this application also provides a method for self-cleaning an air conditioner, the main steps of which include:

[0114] S31. In response to the air conditioner's self-cleaning start command, control the air conditioner to enter the indoor unit's defrosting mode to perform defrosting and cleaning of the indoor heat exchanger.

[0115] S32. After completing the indoor unit defrosting mode, control the air conditioner to enter the outdoor unit defrosting stage of the outdoor unit defrosting mode.

[0116] In some optional embodiments, the specific implementation of steps S31 and S32 can be referred to the previous embodiments, and will not be repeated here.

[0117] S33. During the outdoor unit defrosting phase, check the dryness of the indoor heat exchanger surface;

[0118] In some optional embodiments, the dryness of the indoor heat exchanger surface is determined based on the second operating parameters of the air conditioner and its corresponding second ambient temperature parameters.

[0119] The second operating parameters include the compressor's second frequency F2 and the indoor heat exchanger's second inner coil temperature T2. 内盘管 The second ambient temperature parameter includes the second indoor temperature T1. 室内 Second outdoor temperature T2 室外 Optionally, the compressor's second frequency F2 is the compressor frequency f5 during the outdoor unit's defrosting stage in the previous embodiment, which can be obtained by the air conditioner calling internal parameter data; and the second indoor temperature T1 室内 Second outdoor temperature T2 室外 The temperature can be detected by the two temperature sensors configured in the air conditioner in the previous embodiment; in addition, the air conditioner also has a temperature sensor in the indoor unit, which is installed near the coil of the indoor heat exchanger and is configured to detect the real-time temperature of the indoor heat exchanger.

[0120] Here, the air conditioner also has a pre-defined correlation, which characterizes the correspondence between the aforementioned second operating parameter, second environmental parameter, and drying state. Optionally, this correlation can be a preset mapping table or a fitting formula, etc. In this way, after obtaining the second operating parameter and second environmental parameter, the corresponding drying state information of the indoor heat exchanger surface can be further obtained through matching using this correlation.

[0121] Optionally, the dryness of the surface of the indoor heat exchanger can be expressed by a humidity value (RH), such as 20% relative humidity, 35% relative humidity, 60% relative humidity, etc. Alternatively, the dryness of the surface of the indoor heat exchanger can also be expressed by a humidity range, such as being divided into several ranges such as completely dry, low humidity, medium humidity, and high humidity.

[0122] In some alternative embodiments, the dryness of the indoor heat exchanger surface is detected by a pre-installed moisture sensor. Optionally, the moisture sensor is a microwave radar moisture sensor. The moisture sensor is disposed inside the indoor heat exchanger, its detection area is set to the surface of the indoor heat exchanger, and it is configured to detect moisture information on the surface of the indoor heat exchanger.

[0123] In this way, when performing the above step S33, the moisture information detected by the moisture sensor can be obtained, and then the dryness of the surface of the indoor heat exchanger can be determined based on the moisture information.

[0124] S34. Determine whether the dryness of the surface of the indoor heat exchanger meets the first drying condition. If yes, proceed to step S35; otherwise, proceed to step S36.

[0125] In some optional embodiments, when the dryness of the indoor heat exchanger surface is expressed as a humidity value RH, the first drying condition is: RH ≤ RH e RH e The preset humidity threshold is RH. e The possible values ​​are 5%, 10%, 15%, etc.

[0126] In some alternative embodiments, when the dryness of the indoor heat exchanger surface is expressed as a humidity range, the first drying condition is that the indoor heat exchanger surface is in a completely dry range.

[0127] Therefore, when performing step S34, the corresponding first drying condition can be selected and set according to the specific parameter type that ensures the drying state.

[0128] S35. Control the air conditioner to enter the outdoor unit defrosting mode; then execute step S37.

[0129] In some optional embodiments, the specific implementation of step S35 can be referred to the previous embodiments, and will not be repeated here.

[0130] S36. Extend the defrosting time of the outdoor heat exchanger; and return to step S33.

[0131] Optionally, the frosting time can be extended by a fixed unit of time each time. Specifically, if in each step S34 it is determined that the dryness of the indoor heat exchanger surface does not meet the first drying condition, the unit of time t is extended. e Optional, unit duration t e The value range is 1 to 3 minutes, such as 1 minute, 2 minutes, 3 minutes, etc.

[0132] In some embodiments, the process of obtaining the drying status in step S33 and determining in step S34 is performed at the end of the outdoor unit defrosting stage, and after continuing to execute the outdoor unit defrosting mode for an extended fixed unit duration, the process returns to step S33.

[0133] In some other embodiments, the steps S33 (obtaining the drying status) and S34 (determining the condition) are performed during the outdoor unit's defrosting phase. For example, if the defrosting duration of the outdoor unit's defrosting phase is 10 minutes, these steps can be performed at the 1st minute, 3rd minute, 4th minute, etc. Furthermore, after the outdoor unit's defrosting mode continues for a duration equal to the aforementioned fixed unit duration, the system returns to step S33. For instance, if steps S33 and S34 are performed at the 3rd minute, and the fixed unit duration is 2 minutes, then the outdoor unit's defrosting mode returns to step S33 at the 5th minute.

[0134] In the above embodiments, the cumulative extension of the condensation time in step S36 has a time limit. Optionally, this time limit is 25 minutes, 30 minutes, 35 minutes, etc. That is, after the total extended condensation time reaches this time limit, the condensation time of the outdoor heat exchanger is no longer extended, the outdoor unit condensation stage ends, and then the outdoor unit defrosting stage begins.

[0135] S37. After the outdoor unit defrosting stage is completed, control the air conditioner to enter the indoor unit high-temperature mode to perform high-temperature cleaning of the indoor heat exchanger.

[0136] In some optional embodiments, the specific implementation of step S37 can be referred to the previous embodiments, and will not be repeated here.

[0137] The air conditioner self-cleaning method provided in this embodiment detects and judges the dryness of the indoor heat exchanger before the air conditioner performs the outdoor unit defrosting stage, and adjusts the actual running time of the outdoor unit defrosting stage accordingly. This allows the heat generated during the outdoor unit defrosting stage to continue drying the indoor heat exchanger even if it has not reached the required dryness. This ensures that the indoor heat exchanger reaches a dry and water-free state, reducing the increase in water volume in the indoor unit during the outdoor unit defrosting stage and keeping the indoor unit dry when the air conditioner enters the indoor unit high-temperature mode, thus enhancing the high-temperature sterilization effect on the indoor unit.

[0138] In the previous embodiment, because the condensation time of the outdoor unit's condensation stage was prolonged, the amount of condensation and the thickness of the ice layer on the outdoor unit increased, which may affect the defrosting efficiency and defrosting time of the outdoor unit's defrosting stage. Therefore, in view of the above situation, during the extended period of the outdoor unit's condensation stage, measures to suppress condensation can be implemented on the outdoor unit to avoid excessive frost condensing on the outdoor heat exchanger.

[0139] Optionally, during the extended period of the outdoor unit's defrosting stage, if the outdoor ambient temperature is higher than the set outdoor temperature threshold, the speed of the outdoor fan can be increased to increase the heat exchange between the outdoor air and the outdoor heat exchanger, thereby using the heat of the outdoor air to suppress the frosting rate and amount of frosting on the outdoor heat exchanger.

[0140] Alternatively, the outdoor unit of the air conditioner may also be equipped with a heat replenishment device, such as a heating module installed on the outdoor heat exchanger piping. This heating module can be used to controllably heat its corresponding outdoor heat exchanger piping, thereby increasing the temperature and heat of the refrigerant flowing through it. In this embodiment, during the extended period of the outdoor unit's defrosting phase, the heat replenishment device can be activated to heat the refrigerant flowing through the outdoor heat exchanger, thus also suppressing the amount of frost buildup on the outdoor heat exchanger.

[0141] In some alternative embodiments, in order to accelerate the drying speed of the indoor unit, the control method further includes controlling the indoor fan to periodically switch between forward and reverse rotation during the outdoor unit defrosting phase.

[0142] In this embodiment, the frost water generated during the defrosting stage of the indoor unit tends to flow downwards due to gravity. Therefore, the residual frost water mainly accumulates at the bottom of the heat exchange tubes and fins of the indoor heat exchanger. By controlling the indoor fan to switch between forward and reverse rotation, the droplets can be "repeatedly pulled" to make them easier to detach from the indoor heat exchanger.

[0143] Optionally, each cycle of the indoor fan includes t 正转 and t 反转 , where t反转 >t 正转 For example, t 正转 The value of t can be 20s, 30s, etc. 反转 The values ​​are 1 min, 2 min, etc. Therefore, in this implementation, by keeping the indoor fan in reverse for a longer period of time within the cycle, the droplets remaining on the surface of the indoor heat exchanger are driven by the reverse wind force to flow along the surface of the heat exchanger and gradually wet the surrounding parts. This allows the droplets to be dispersed on the heat exchanger in a smaller particle form, increasing the actual drying area and accelerating the drying efficiency of the indoor heat exchanger.

[0144] At the same time, another option is to... 反转 During the specified time period, the indoor fan speed v 反转 Greater than t 正转 Wind speed v corresponding to the time period 正转 This increased airflow velocity accelerates the flow rate of droplets on the heat exchanger surface, further improving the drying efficiency of the indoor heat exchanger.

[0145] In some alternative embodiments, this application also provides a method for self-cleaning an air conditioner, combined with... Figure 4 As shown, its main steps include:

[0146] S41. In response to the air conditioner's self-cleaning start command, control the air conditioner to enter the indoor unit's defrosting mode to perform defrosting and cleaning of the indoor heat exchanger.

[0147] S42. After completing the indoor unit defrosting mode, control the air conditioner to enter the outdoor unit defrosting stage of the outdoor unit defrosting mode.

[0148] In some optional embodiments, the specific implementation of steps S41 and S42 can be referred to the previous embodiments, and will not be repeated here.

[0149] S43. During the outdoor unit defrosting phase, obtain the third operating parameter of the air conditioner;

[0150] In this embodiment, the third operating parameter includes the third inner coil temperature T3 of the indoor heat exchanger. 内盘管 and / or the third outlet air temperature T3 出风 Optional, the third inner coil temperature T3 内盘管 The temperature can be detected and obtained through the temperature sensor in the previous embodiment. In addition, the air conditioner is also equipped with a temperature sensor, which is located on the air outlet side of the indoor unit of the air conditioner and is configured to detect the real-time air outlet temperature of the indoor heat exchanger.

[0151] S44. Determine whether the third working parameter meets the second drying condition. If yes, proceed to step S45; otherwise, proceed to step S46.

[0152] Optionally, the third operating parameter is the third inner coil temperature T3. 内盘管 In this case, the second drying condition is "T3". 内盘管 ≥T3 内盘管阈值 "Among them, T3" 内盘管阈值 This is the preset internal coil temperature threshold.

[0153] Another option is to set the third operating parameter to the third outlet air temperature T3. 出风 In this case, the second drying condition is "T3". 出风 ≥T3 出风阈值 "Among them, T3" 内盘管阈值 This is the preset air outlet temperature threshold.

[0154] Another option is to include the third operating parameter, which is the third internal coil temperature T3. 内盘管 and the third outlet air temperature T3 出风 In this case, the second drying condition is "T3". 内盘管 ≥T3 内盘管阈值 And T3 出风 ≥T3 出风阈值 ".

[0155] S45. Control the air conditioner to enter the outdoor unit defrosting mode; then execute step S47.

[0156] S46. Extend the defrosting time of the outdoor heat exchanger; and return to step S43.

[0157] S47. After the outdoor unit defrosting stage is completed, control the air conditioner to enter the indoor unit high-temperature mode to perform high-temperature cleaning of the indoor heat exchanger.

[0158] In some optional embodiments, the specific implementation of steps S45 to S47 can be referred to the previous embodiments, and will not be repeated here.

[0159] The air conditioner self-cleaning method provided in this embodiment can determine the dryness of the indoor unit by judging the temperature of the indoor coil or the air outlet temperature before the air conditioner performs the outdoor unit defrosting stage. This allows for adjustment of the actual running time of the outdoor unit's defrosting stage, which can also enhance the high-temperature sterilization effect of the indoor unit.

[0160] In some alternative embodiments, it can be determined simultaneously whether the air conditioner meets the first drying condition and the second drying condition mentioned above. If both drying conditions are met, the air conditioner is controlled to enter the outdoor unit defrosting stage.

[0161] In the aforementioned optional embodiments, for the outdoor unit defrosting stage of the outdoor unit defrosting mode, the corresponding defrosting method can be selected according to the outdoor environmental conditions.

[0162] Specifically, before defrosting the outdoor heat exchanger, the air conditioner's self-cleaning method also includes: obtaining a third ambient temperature parameter; and determining the defrosting method for the outdoor unit's defrosting stage based on the third ambient temperature parameter.

[0163] Optionally, the third ambient temperature includes the third outdoor temperature T3. 室外 Furthermore, if T3 室外 ≥T3 室外阈值 Then, the outdoor heat exchanger is defrosted using ventilation mode. Here, in T3 室外 ≥T3 室外阈值 In situations where the outdoor ambient temperature is high and there is a lot of heat in the air, this embodiment increases the heat exchange between the outdoor air and the outdoor heat exchanger by turning off the air conditioner compressor and turning on the outdoor fan. This allows the heat from the outdoor air to melt the frost condensed on the outdoor heat exchanger, reducing the power consumption for defrosting the air conditioner and lowering the cost of using the air conditioner.

[0164] Furthermore, if T3 outdoor < T3 outdoor threshold, then the outdoor heat exchanger is defrosted in reverse circulation mode. Here, when T3 outdoor < T3 outdoor threshold, the outdoor ambient temperature is low and the air heat is low. Therefore, in this embodiment, by turning on the compressor and circulating the refrigerant in reverse circulation mode along the cooling flow direction, the heat of the air conditioning refrigerant can be used to accelerate the defrosting speed of the outdoor heat exchanger. In this embodiment, the T3 outdoor threshold is a third outdoor temperature threshold, and its value ranges from 4 to 6°C. For example, the specific values ​​of the T3 outdoor threshold are 4°C, 4.5°C, 5°C, 6°C, etc. Referring to Figure 5, this disclosure provides an air conditioner self-cleaning device, including a processor 100 and a memory 101. Optionally, the device may further include a communication interface 102 and a bus 103. The processor 100, communication interface 102, and memory 101 can communicate with each other via the bus 103. The communication interface 102 can be used for information transmission. The processor 100 can call logical instructions in the memory 101 to execute the air conditioner self-cleaning method of the above embodiment. Furthermore, the logic instructions in the aforementioned memory 101 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. The memory 101, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the methods in the embodiments of this disclosure. The processor 100 executes functional applications and data processing by running the program instructions / modules stored in the memory 101, thereby realizing the air conditioner self-cleaning method in the above embodiments. The memory 101 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the terminal device. Furthermore, the memory 101 may include high-speed random access memory and may also include non-volatile memory. This disclosure provides an air conditioner that includes the above-described air conditioner self-cleaning device. This disclosure provides a computer-readable storage medium storing computer-executable instructions configured to perform the above-described air conditioner self-cleaning method. This disclosure provides a computer program product, which includes a computer program stored on a computer-readable storage medium. The computer program includes program instructions that, when executed by a computer, cause the computer to perform the aforementioned air conditioner self-cleaning method. The aforementioned computer-readable storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium. The technical solutions of this disclosure can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes one or more instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in this disclosure. The aforementioned storage medium can be a non-transitory storage medium, including: a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and other media capable of storing program code; it can also be a transient storage medium. The foregoing description and accompanying drawings fully illustrate embodiments of this disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terminology used in this application is for describing embodiments only and is not intended to limit the claims. As used in the description of embodiments and claims, the singular forms “a,” “an,” and “the” are intended to equally include the plural forms unless the context clearly indicates otherwise. Similarly, the term “and / or” as used in this application means including one or more of the associated listed items and all possible combinations thereof. Additionally, when used in this application, the term "comprise" and its variations "comprises" and / or "comprising" refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Without further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes said element. In this document, each embodiment may focus on the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, the relevant parts can be referred to the description of the method section. Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. The methods and products (including but not limited to devices and equipment) disclosed in the embodiments herein can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of units may be merely a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed units may be through some interfaces, and the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected to implement this embodiment according to actual needs. Furthermore, the functional units in the embodiments of this disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than that shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description; sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. Each block in a block diagram and / or flowchart, and combinations of blocks in a block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

Claims

1. A method for self-cleaning an air conditioner, characterized in that, include: In response to the air conditioner's self-cleaning start command, the air conditioner is controlled to enter the indoor unit's defrosting mode to perform defrosting and cleaning of the indoor heat exchanger. After completing the indoor unit's defrosting mode, the air conditioner is switched to the outdoor unit's defrosting mode to perform defrosting and cleaning of the outdoor heat exchanger. After completing the outdoor unit's defrosting mode, the air conditioner is switched to the indoor unit's high-temperature mode to perform high-temperature cleaning of the indoor heat exchanger.

2. The method according to claim 1, characterized in that, Controlling the air conditioner to enter the indoor unit high-temperature mode includes: Control the air conditioner to operate in heating mode and adjust the operating parameters of one or more components, including the indoor fan, outdoor fan, compressor, and throttling device, so that the indoor heat exchanger is at the preset high-temperature sterilization temperature T. 高温 And maintain the preset sterilization time t 杀菌 ; Among them, T 高温 The value range is 56–60℃, and / or, t 杀菌 The value range is 30 to 60 minutes.

3. The method according to claim 1 or 2, characterized in that, Before controlling the air conditioner to enter the indoor unit high-temperature mode, it also includes: Obtain the first ambient temperature parameter; the first ambient temperature parameter includes the first indoor temperature T1. 室内 and / or the first outdoor temperature T1 室外 ; If the first ambient temperature parameter does not meet the over-temperature protection conditions, the air conditioner will be controlled to enter the indoor unit high-temperature mode; the over-temperature protection conditions include: T1 室内 ≥T1 室内阈值 Or, T1 室外 ≥T1 室外阈值 ; T1 室内阈值 T1 is the first indoor temperature threshold. 室外阈值 This is the second outdoor temperature threshold.

4. The method according to claim 1, characterized in that, Before defrosting the outdoor heat exchanger, the following steps are also included: Check the dryness of the surface of the indoor heat exchanger; If the surface dryness of the indoor heat exchanger does not meet the first drying condition, the condensation time of the outdoor heat exchanger shall be extended.

5. The method according to claim 4, characterized in that, Inspecting the dryness of the indoor heat exchanger surface includes: Obtain the second operating parameters of the air conditioner and its corresponding second ambient temperature parameters; the second operating parameters include the compressor's second frequency F2 and the indoor heat exchanger's second inner coil temperature T2. 内盘管 The second ambient temperature parameter includes the second indoor temperature T1. 室内 Second outdoor temperature T2 室外 ; The dryness state of the indoor heat exchanger surface is determined from the preset correlation based on the second operating parameter and the second ambient temperature parameter.

6. The method according to claim 4, characterized in that, The air conditioner has a moisture sensor installed in the indoor unit, which is configured to detect moisture information on the surface of the indoor heat exchanger; Detecting the dryness of the indoor heat exchanger surface includes: acquiring moisture information detected by a moisture sensor, and determining the dryness of the indoor heat exchanger surface based on the moisture information.

7. The method according to claim 1 or 4, characterized in that, Before defrosting the outdoor heat exchanger, the following steps are also included: Obtain the third operating parameter of the air conditioner; the third operating parameter includes the third indoor coil temperature T3 of the indoor heat exchanger. 内盘管 and / or the third outlet air temperature T3 出风 ; The second drying condition is determined based on the third working parameter; wherein, the second drying condition includes: T3 内盘管 ≥T3 内盘管阈值 Or, T3 出风 ≥T3 出风阈值 .

8. The method according to claim 1, characterized in that, Before defrosting the outdoor heat exchanger, the following steps are also included: Obtain the third ambient temperature parameter; the third ambient temperature parameter includes the third outdoor temperature T3. 室外 ; If T3 室外 ≥T3 室外阈值 Then, the outdoor heat exchanger will be defrosted using the ventilation mode. If T3 室外 <T3 室外阈值 Then, the outdoor heat exchanger is defrosted using the reverse circulation mode. Among them, T3 室外阈值 This is the third outdoor temperature threshold.

9. A self-cleaning device for an air conditioner, comprising a processor and a memory storing program instructions, characterized in that, The processor is configured to perform the air conditioner self-cleaning method as described in any one of claims 1 to 8 when executing program instructions.

10. A computer-readable storage medium storing program instructions, characterized in that, When the program instructions are executed, they cause the computer to perform the air conditioner self-cleaning method as described in any one of claims 1 to 8.

11. An air conditioner, characterized in that, It includes an air conditioner body and an air conditioner self-cleaning device as described in claim 9.

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