Air conditioner self-cleaning control method and air conditioner

[0017] In order to make the embodiments, technical solutions and advantages of the present invention more obvious, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. Examples. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0018] The self-cleaning of the air conditioner refers to cleaning the indoor heat exchanger of the indoor unit. Such as figure 1 As shown, the self-cleaning control method of the air conditioner of the present invention includes the following steps: S110, acquiring the current value of the fan of the indoor unit at the current speed; S120, acquiring the air conditioner from the last time when the current value is less than the set current value The PM2.5 value of the indoor air from the completion of the cleaning to the current time period; S130, judging whether to run the self-cleaning mode according to the PM2.5 value of the indoor air. PM2.5 represents the content of fine particulate matter per cubic meter of air. For example, the PM2.5 concentration index of 10 micrograms/m3 is 10, and the PM2.5 value of the present invention is the PM2.5 concentration index. Those skilled in the art can understand that if the fan current alone is used as the basis for judgment of self-cleaning, it is unscientific. Sometimes it may cause misjudgment due to condensation or the motor itself and frequent self-cleaning. In addition, whether the indoor heat exchanger is dirty or blocked or how long it will be dirty is largely related to the indoor air quality (PM2.5 value). When the air quality is poor, the indoor heat exchanger gets dirty quickly; When the quality is better, the indoor heat exchanger gets dirty slowly. Therefore, in order to more accurately determine when the air conditioner turns on the self-cleaning mode, the present invention performs a comprehensive judgment in combination with the fan current and the air quality.

[0019] Specifically, those skilled in the art can understand that, in step S120, the set current value can be selected by those skilled in the art according to actual conditions. For example, the standard current value of the fan at different speeds of the indoor heat exchanger in the case of no dirty blockage is obtained through the test method. When the real-time current value at a certain speed is lower than the standard current value at that speed, it is indicated The indoor heat exchanger begins to become dirty and clogged. As the real-time current value gradually decreases, the indoor heat exchanger becomes more and more dirty. Those skilled in the art can choose a reasonable setting according to different test scenarios and different needs. Current value (the set current value at the same speed ≤ the standard current value at the same speed). When the current value of the fan at the current speed is lower than the set current value, the PM2.5 value of the indoor air of the air conditioner from the completion of the last self-cleaning to the current time period is obtained.

[0020] As an example, the PM2.5 value of the indoor air in the current time period from the completion of the last self-cleaning of the air conditioner is all the PM2.5 values ​​of the air in this time period. Then it is judged whether any of these PM2.5 values ​​exceeds the preset value, if so, it is judged that the indoor heat exchanger is dirty and blocked, and the air conditioner is operated in the self-cleaning mode; otherwise, the self-cleaning mode is not operated. The preset value can be flexibly selected by those skilled in the art according to the actual application scenario of the air conditioner. For example, the preset value can be set to any value between 120-150.

[0021] In this embodiment, all the PM2.5 values ​​of the indoor air of the air conditioner from the completion of the last self-cleaning to the current time period can be directly obtained from the pre-stored indoor air PM2.5 values. Among them, the pre-stored indoor air PM2.5 value can be the indoor air PM2.5 value detected by the PM2.5 sensor that comes with the air conditioner; it can also be obtained by obtaining local weather information, and then from the weather information The PM2.5 value of the obtained indoor air.

[0022] As another example, the PM2.5 value of the indoor air in the current time period from the completion of the last self-cleaning of the air conditioner is the average PM2.5 value of the air in this time period. Then judge whether the average PM2.5 value exceeds the preset value, if the average PM2.5 value exceeds the preset value, it is judged that the indoor heat exchanger is dirty and blocked, and the air conditioner is operated in self-cleaning mode; otherwise, the self-cleaning mode is not operated. mode.

[0023] In this embodiment, the step of obtaining the average PM2.5 value of the indoor air from the last self-cleaning to the current time period of the air conditioner may be: obtaining the PM2.5 value of all indoor air stored in advance, and then Calculate the average value of PM2.5 values ​​of indoor air. Among them, the pre-stored indoor air PM2.5 value can be the indoor air PM2.5 value detected by the PM2.5 sensor that comes with the air conditioner; it can also be obtained by obtaining local weather information, and then from the weather information The PM2.5 value of the obtained indoor air.

[0024] The present invention also provides an air conditioner including a controller configured to execute the above-mentioned air conditioner self-cleaning control method.

[0025] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the drawings. However, those skilled in the art will readily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.