Defrosting method for low temperature dehumidifier

Abstract

The invention relates to a defrosting technology of a dehumidifier, in particular to a defrosting method of a low-temperature dehumidifier which stops a compressor and increases the wind volume of a fan. The defrosting method can solve the problems that a direction changing valve is currently used for changing the direction of a circulating refrigerant for defrosting, while the direction changing valve is expensive and easily damaged. The technical proposal is as follows: the compressor is started and the fan is operated under the set wind volume, then the dehumidification is operated for a period of time and the temperature of an exhaust pipe of the evaporator is simultaneously judged, if the temperature thereof is higher than the defrosting inrush temperature, the dehumidification is continuously carried out, and if the temperature is not higher than the defrosting inrush temperature, the compressor is closed, the wind volume of the fan is increased, and the defrosting is started; the temperature of the exhaust pipe of the evaporator is simultaneously judged, when the temperature is higher than the defrosting release temperature, the dehumidification state is returned, if the temperature is still not higher than the defrosting release temperature, the defrosting is continuously carried out till the temperature is higher than the defrosting release temperature under the situations that the compressor is closed and the wind volume of the fan is increased, and then the dehumidification state is returned. The defrosting method reduces the cost of the dehumidifier and save the electricity charge due to the elimination of the direction changing valve.

Description

technical field [0001] The invention relates to the defrosting technology of a dehumidifier, in particular to a defrosting method for a low-humidity dehumidifier which stops a compressor and accelerates the operation of a motor. Background technique [0002] Generally speaking, after the dehumidifier introduces the humid air in the room into the inside of the cabinet, it passes through the heat exchanger formed by the evaporator and the condenser that flows the refrigerant inside to reduce the humidity, and then discharges the air with reduced humidity back to the cabinet. to indoors. [0003] figure 1 It is an exploded perspective view of a general conventional dehumidifier. [0004] Such as figure 1 As shown, the structure of the dehumidifier in the prior art includes: a compressor 1 installed on the chassis to compress the refrigerant; a condenser 2 connected to the outlet of the compressor to exchange heat between the refrigerant compressed by the compressor and the s...

AI Technical Summary

Problems solved by technology

That is, through the electromagnetic valve, a part of the high-temperature and high-pressure refrigerant is directly introduced into the evaporator for a period of time to defrost. The disadvantage is that the heat exchange effect of the evaporator is reduced.

[0013] 4. Reversing defrosting, as shown by the dotted line in Figure 2, that is, using the reversing valve 10 to change the refrigerant circulation direction in the dehumidifier, and directly transport the high-temperature and high-pressure refrigerant compressed by the compressor 1 to the evaporator 3 for a period of time for defrosting. Frost, after the evaporator is defrosted, the refrigerant returns to the compressor 1 through the expansion valve 9 and the condenser 2. The disadvantage is that the heat exchange efficiency of the evaporator is reduced, and the solenoid valve is easily damaged.

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