Control method and system for defrosting judgment of air conditioner

Abstract

The invention relates to a control method and system for defrosting judgment of an air conditioner. The control method for defrosting judgment of the air conditioner comprises the following steps that S1, the continuous operation time T in a heating mode state is collected; S2, whether the continuous operation time T is lager than or equal to a target time T1 is judged, the step S3 is executed if yes, and the step S1 is executed again if not; S3, whether the current temperature Tt of a condenser coiler is smaller than a target temperature Ta or not is judged, the step S4 is executed if yes, and the step S2 is executed again if not; S4, operation in the defrosting mode is controlled according to the dropping speed of the temperature of the condenser coiler. According to the control method and system for defrosting judgment of the air conditioner, whether defrosting is needed for a condenser or not is judged by dynamically acquiring the dropping speed of the temperature of the condenser coiler, the thickness of a frost layer can be intelligently and accurately reflected by the dropping speed of the temperature of the condenser coiler, and the problems that due to the fact that the defrosting mode is started frequently, the heating effect of the air conditioner is affected, fluctuation of the indoor temperature is caused, and use comfort is affected are solved.

Description

technical field [0001] The invention relates to the field of air conditioner controllers, in particular to a control method and system for judging defrosting of an air conditioner. Background technique [0002] When the air conditioner is heating at low temperature, frost will form on the coil of the condenser, which will affect the heating effect of the air conditioner. At this time, it needs to enter the defrosting mode to run defrosting. At present, the defrosting judging control method adopted by most air conditioners is to judge whether the condenser needs to be defrosted through the static collection method of detecting the condenser coil temperature or the outdoor ambient temperature value after heating operation for a certain period of time. The disadvantage of this control method is Under low temperature and low humidity, the detected ambient temperature value and the temperature of the condenser coil are very low, but the frost layer is very thin or even does not f...

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Problems solved by technology

[0003] The present invention provides a control method and system for judging defrosting of an air conditioner to solve the technical problems that the above-mentioned air conditione

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