Air Conditioning Compressor Frosting 3 Cause

What are the causes of air conditioning compressor frosting failure?

Air conditioning compressor fronsting

Refrigerant Cause

1. Too much refrigerant

Too much refrigerant causes incomplete evaporation of the evaporator, and the incompletely evaporated refrigerant migrates to the suction pipe, causing frost on the suction pipe, and then migrates to the compressor suction cylinder, absorbing a large amount of heat from the compressor, which will cause compression Machine frost.

2. The opening of the expansion valve is too large (expansion valve failure)

If the opening of the expansion valve is too large, it will inevitably lead to more refrigerant entering the evaporator, and finally cause the compressor to frost.

3. Low refrigerant

Due to the small amount of refrigerant, the evaporation pressure of the evaporator is low, resulting in the evaporation temperature. It will also gradually lead to dew condensation on the evaporator to form a heat insulation layer, and transfer the expansion point to the return air of the compressor, resulting in frosting of the return air of the compressor.

Fan Reason

Faulty fan air volume (small air volume) → poor evaporation effect of the evaporator → incomplete evaporation of the refrigerant → frosting of the evaporator → frosting of the suction pipe → frosting of the compressor

Evaporator Cause

1. The evaporator is dirty and blocked

The evaporator is dirty and blocked → the evaporation effect of the evaporator is not good → the refrigerant is not evaporated completely → the evaporator is frosted → the suction pipe is frosted → the compressor is frosted

2. The design of the evaporator is small

If the design of the evaporator is small, it will lead to incomplete evaporation of the refrigerant in the evaporator, which will lead to serious frosting on the evaporator, and the frosting will slowly migrate to the compressor.

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