Defrost control method and device for dehumidifier

Abstract

The invention discloses a method for controlling defrosting of a dehumidifier, which includes: obtaining the tube temperature T1 of the evaporator of the dehumidifier during the operation of the dehumidifier; when the tube temperature T1 of the evaporator is less than or equal to a first preset temperature, starting accumulative timing; obtain the indoor ambient temperature T2; obtain the defrosting parameters corresponding to the indoor ambient temperature T2 according to the preset mapping relationship between the indoor ambient temperature and defrosting parameters; when the evaporator tube temperature T1 is less than or equal to the first preset When the cumulative timing of the set temperature reaches the running time of the dehumidifier when entering defrosting, enter defrosting; when the tube temperature T1 of the evaporator of the dehumidifier is greater than or equal to the tube temperature of the evaporator when exiting defrosting, exit defrosting. The invention also discloses a defrosting control device of the dehumidifier. The invention realizes the maximal rationalization of the time ratio between the operation period of the dehumidifier and the defrosting period, so as to achieve the optimum dehumidification capacity in the middle and low environments.

Description

technical field [0001] The invention relates to the field of dehumidifiers, in particular to a defrosting control method and device for a dehumidifier. Background technique [0002] When the current dehumidifier operates in a medium and low temperature environment, the dew point temperature of most of the working conditions is below 0 °C. The temperature is lower than the dew point temperature, which is below 0 degrees. As we all know, water below 0 degrees will form frost, which will gradually deteriorate into ice. As the thickness of frost and ice becomes thicker and thicker, if the frost is not defrosted, the heat exchange between the evaporator and the air will become worse and worse, and finally the evaporator can basically no longer have the dehumidification function; frost action so that the evaporator can re-dehumidify. [0003] Now the defrosting method of the dehumidifier is to stop the operation of the compressor, and then the fan continues to operate to defros...

AI Technical Summary

Problems solved by technology

In this way, the frosting state of the evaporator will be defrosted before it should be defrosted, or it will not be defrosted when it is far beyond the defrosting state. Wind blowing will also cause the water melted from the frost on the surface of the evaporator to be blown into the air again, reducing the amount of dehumidification

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