Defrost control method for air conditioners

Abstract

The invention discloses a defrost control method for air conditioners. The defrost control method includes S1, detecting running time M of compressors in heating modes; S2, detecting indoor temperatures T1 and pipe temperatures T2 of indoor heat exchangers to obtain difference values DeltaT if the running time M is longer than first preset time M1; S3, comparing the difference values DeltaT with one another to obtain the maximum value DeltaT<MAX> of the difference values, judging whether values DeltaH are larger than first preset values TS1 or not, and comparing the difference values DeltaT with second preset values TS2; S4, enabling the air conditioners to enter defrost stages when the values DeltaH are larger than or equal to the first preset values TS1, the difference values DeltaT are smaller than the second preset values TS2 and the running time M is longer than or equal to time M2; S5, completing defrost when defrost time is up. The difference values DeltaT meet an equation of DeltaT=T2-T1. The values DeltaH meet an equation of DeltaH=DeltaT<MAX>-DeltaT. The defrost control method for the air conditioners in an embodiment of the invention has the advantages that frostless defrost states of the air conditioners can be prevented, and heating effects of the air conditioners can be guaranteed.

Description

technical field [0001] The invention relates to the field of household appliances, in particular to a defrosting control method for an air conditioner. Background technique [0002] In the existing intelligent defrosting method, the setting of the defrosting time is based on the worst industrial control situation, and the defrosting time is relatively long, while the general frosting situation does not require such a long time for defrosting, resulting in waste , affecting heating operation. And in the past defrosting method, as long as there is a breeze in the anti-cold wind or the fan is stopped, it will start defrosting as soon as the time is up, but under low temperature industrial control, frosting will generally not occur, and no frosting defrosting will easily occur. Contents of the invention [0003] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide a m...

AI Technical Summary

Problems solved by technology

[0002] In the existing intelligent defrosting method, the setting of the defrosting time is based on the worst industrial control situation, and the defrosting time is relatively long, while the general frosting situation does not require such a long time for defrosting, resulting in waste , affecting heating operation

In addition, in the previous defrosting method, as long as there is a breeze in the anti-cold wind or the fan is stopped, it will start defrosting as soon as the time is up. However, under low-temperature industrial control, frosting will generally not occur, and no-frost defrosting will easily occur.

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