Air conditioner defrosting system and method

Abstract

The invention discloses an air conditioner defrosting system. The air conditioner defrosting system comprises an air pressure detection unit, a comparison unit and an execution unit. The air pressuredetection unit is used for detecting the air pressure at an air outlet in real time or regularly when a motor of an air conditioner outdoor fan is at a certain rotating speed. When it is detected thatthe air pressure at the air outlet when the motor is at the certain rotating speed is inconsistent with the air pressure when the air outlet is normal and the motor is at the same rotating speed, theexecution unit opens a defrosting unit of an air conditioner to defrost the air outlet of the air conditioner outdoor fan. The comparison unit is used for comparing the air pressure at the air outletwhen the motor is at the certain rotating speed with the air pressure when the air outlet is normal and the motor is at the same rotating speed during defrosting or at the end of defrosting so as tojudge whether defrosting is completed or not. The invention further discloses an air conditioner defrosting method. According to the air conditioner defrosting system and the air conditioner defrosting method, the accumulated frost of a heat exchanger of an outdoor unit can be removed accurately and timely, the purpose of energy saving is realized, and the demand of consumers in different regionsof the country for intelligent defrosting of the air conditioner can be met.

Description

technical field [0001] The invention relates to the technical field of air conditioner defrosting, in particular to an air conditioner defrosting system and method. Background technique [0002] As a cooling or heating device, air conditioners have become a part of people's lives and improve the comfort of people's lives. However, the operation of air conditioners consumes more electric energy. If the air conditioner is heating for a long time, the outdoor heat exchanger Frost will be produced, the heating effect will be seriously affected, and a large amount of electric energy will be wasted. In order to melt away the frost generated during heating, the air conditioner often starts to defrost after running for a certain period of time or when the outdoor evaporator meets certain conditions. The air conditioner cannot continue to operate until the defrosting is complete. There are many methods of defrosting at present, such as heating shutdown defrosting, that is, four-way...

AI Technical Summary

Problems solved by technology

[0005] Our country has a vast territory, from south to north, from east to west, at the same time on the same day, the temperature difference is very large; even in the same area, the ambient temperature is constantly changing, and the difference is very large. The frosting method, or the defrosting method using the method of detecting the temperature of the indoor coil, often may not accurately judge the start point and end point of the defrost, either starting too early or too late, or ending too early or too late, caused a waste of energy

In addition, through the light-emitting device and the light-receiving device, when the cooling fin of the heat exchanger of the outdoor unit is deformed, the light cannot pass through, which will cause defrosting malfunction

[0006] The traditional defrosting method is not precise and accurate enough, and the error is large

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