Air conditioner outdoor heat exchanger self-cleaning control method, air conditioner and computer readable storage medium

Abstract

The invention provides an air conditioner outdoor heat exchanger self-cleaning control method, an air conditioner and a computer readable storage medium. The method comprises the following steps thatafter a heating mode works for a first preset time, an initial defrosting mode is entered, after the work of the initial defrosting mode is finished, whether the number of times that the temperature of an outdoor unit coil is not higher than a preset filth blockage temperature threshold value is larger than the preset number of times or not is judged, if yes, the situation that filth blockage exists in the heat exchanger is determined, and an preset self-cleaning operation is executed. The invention further provides the air conditioner applying the method and a computer readable storage mediumfor achieving the method. According to the air conditioner outdoor heat exchanger self-cleaning control method, the air conditioner and the computer readable storage medium, the filth blockage of theoutdoor heat exchanger of the air conditioner can be accurately judged, calculation of the self-cleaning execution time and duration of the outdoor heat exchanger of the air conditioner is more accurate, the better self-cleaning effect of the outdoor heat exchanger is achieved, and the heat exchange effect of the outdoor heat exchanger is improved.

Description

technical field [0001] The present invention relates to the technical field of air conditioner control, in particular to a self-cleaning control method for an outdoor heat exchanger of an air conditioner, an air conditioner for realizing the method, and a computer-readable storage medium. Background technique [0002] The air conditioner transfers heat through the indoor / outdoor heat exchanger to achieve room cooling and heating. The heat exchange effect of the heat exchanger directly affects the cooling / heating effect and operating energy consumption of the air conditioner. The external unit of an air conditioner generally includes a cooling / heating system composed of heat exchangers, pipeline components, compressors, and valves, as well as an air duct system and a control system composed of fans, fan blades, and grilles. Among them, the heat exchange of the heat exchanger relies on the air provided by the fan to flow through the heat exchanger for heat exchange. The heat ...

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Problems solved by technology

Among them, the self-cleaning of the outdoor heat exchanger of the air conditioner is mainly by starting the defrosting procedure for the air conditioner, such as controlling the reversing of the four-way valve, so that the high-temperature refrigerant flows through the outdoor heat exchanger and melts the frost on the outdoor heat exchanger. This method can only simply peel off the surface blockages adhering to the outdoor heat exchanger through melting, but cannot remove the stubborn blockages on the cooling fins of the outdoor heat exchanger

[0007] For example, there is an existing self-cleaning control method for the outdoor heat exchanger of an air conditioner. According to the relationship between the self-cleaning and heating operation time (frosting time) and the preset time, the defrosting time is controlled and the external fan is controlled when the defrosting starts. Start reverse to carry out self-cleaning control. The reverse start and stop of the external fan is controlled by the preset reverse time. The controlled heating operation time is determined by the amount of frosting meeting the amount of defrosting water required for self-cleaning. It needs to be observed by the user If the heat exchanger is dirty and blocked, the frosting time and the external fan reversal time can be set, and it is impossible to reasonably enter the self-cleaning and provide the frosting time and the external fan reversal time according to the surrounding working conditions and the cleanliness of the air conditioner itself.

If the outdoor heat exchanger is dirty and there are stubborn blockages attached, a thicker frost layer is bound to be required to ensure the removal effect of the stubborn blockages. If the frost layer is too thick, the heat exchange effect of the air conditioner will deteriorate and affect the normal use of the user. air conditioner

[0008] Another existing self-cleaning control method for the outdoor heat exchanger of an air conditioner is to determine the corresponding preset defrosting time according to the outdoor ambient temperature, and control the operation of the air conditioner to achieve two consecutive frosting and defrosting modes. The defrosting time is preset so that the defrosting and defrosting water can flow to deep parts such as fin gaps, but this method cannot give a reasonable defrosting time according to the cleanliness of the air conditioner itself

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