Air conditioner indoor/outdoor unit cleaning method

Abstract

The invention discloses an air conditioner indoor / outdoor unit cleaning method. The method comprises the steps of: controlling a heat exchanger to be cleaned to enter a self-cleaning mode; adjusting the operation frequency of an air conditioner, the openness of a throttling device and the rotating speed of a fan corresponding to the heat exchanger to be cleaned, and controlling the evaporation temperature of the heat exchanger to be cleaned to keep in a preset range to condense the surface of the heat exchanger to be cleaned; condensing the heat exchanger to be cleaned by t1 time; detecting if the high / low pressure difference of the air conditioner reaches preset conditions; controlling a four-way valve to change the direction to perform the defrosting switching of indoor and outdoor heat exchangers when the high / low pressure difference of the air conditioner reaches the preset conditions; and adjusting air conditioner operation parameters when the high / low pressure difference of the air conditioner dose not reach the preset conditions, and then, controlling the four-way valve to change the direction to perform the defrosting switching of the indoor and outdoor heat exchangers when the high / low pressure difference of the air conditioner reaches the preset conditions. As the direction change of the four-way valve can be controlled through detecting if the high / low pressure difference of the air conditioner reaches the preset conditions, the higher shock on the compressor caused by excessive high / low pressure difference of the air conditioner can be prevented.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a method for cleaning the inner and outer units of an air conditioner. Background technique [0002] In order to ensure sufficient heat exchange of the air conditioner, the heat exchanger fins of the general air conditioner are tightly designed into multi-layer sheets, and the gap between each sheet is only 1-2mm, and various pressure profiles or cracks are added to the air conditioner fins to increase heat transfer area. When the air conditioner is running, a large amount of air circulates through the heat exchanger to exchange heat. Various dust and impurities in the air will adhere to the heat exchanger, which not only affects the effect of the heat exchanger, but also easily breeds bacteria, which makes the air conditioner produce peculiar smell and even affects users. Health, then you need to clean the air conditioner heat exchanger. [0003] At present, the clean...

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Problems solved by technology

[0003] At present, the cleaning work of the outdoor unit usually takes a long time or is never cleaned. During manual cleaning, because the heat exchanger is close to the wall, it is inconvenient to clean, resulting in incomplete cleaning. If foreign objects are used to clean, it may cause the fins to fall. sheet, which affects the heat exchange effect of the heat exchanger and shortens its service life

[0004] In the prior art, the heat exchanger is cleaned by defrosting and defrosting. However, when the self-cleaning switch between the indoor heat exchanger and the outdoor heat exchanger is performed, the evaporation temperature is very low and the evaporation pressure is low during the self-cleaning process. , the high and low pressure difference of the air conditioner is too large, which will cause a large impact on the compressor during the switching process of the four-way valve, resulting in unstable operation of the air conditioner

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