What is the cause of the freezing of the evaporator of the Gree air conditioner

Evaporator icing is mainly caused by insufficient refrigerant, low compressor efficiency, and excessive refrigerant.

If the refrigerant is insufficient, the split air conditioner will leak or leak the refrigerant due to the installation or use time for a long time. When the refrigerant in the refrigeration system is reduced, the evaporation pressure is too low, causing the evaporator to freeze. The compressor efficiency is low, the compressor fails for a long time, the compressor compression efficiency is reduced, or the compressor gas distribution system is damaged, causing the pressure to be too low and freeze.

There is too much refrigerant, and some air conditioners re-inject refrigerant due to displacement, leakage, etc. The maintenance personnel improperly added more refrigerant, causing too much refrigerant to flow to the evaporator and partially evaporate and freeze.

For the first phenomenon, the failure is mainly caused by too little refrigerant. As we all know, for ordinary air conditioners, capillary throttling is adopted, which is constant, that is, the pressure behind the capillary is affected by the condensation pressure in front of the capillary. In the absence of refrigerant, the pressure behind the capillary decreases due to the reduced condensation pressure, and the lower the throttle size, the lower the pressure can provide the lower the evaporation pressure.

The smaller the liquid supply, the lower the evaporation temperature, and the smaller the refrigeration capacity, so that the capillary will freeze at the evaporator inlet, and then more and more, and the evaporation temperature will become less and less, so that a vicious circle is formed, and the frozen part is closer and closer to the evaporator outlet. This often happens because the indoor tube temperature is at the outlet of the room exchanger, and the return gas superheat will increase due to the small amount of liquid supply, so the supercooling protection that should have worked does not work! Of course, if the shortage of refrigerant reaches a certain point, it will not freeze, but will simply turn into superheated steam!

Some can also be caused by clogged capillaries, but they are rare.

Common causes of frosting or even freezing of evaporators;

1.Insufficient refrigerant.

2.The system is slightly clogged.

3.The evaporator is too dirty.

Summary. What is the reason for the old freezing of the air conditioner evaporation tank? Hello dear, the reason for the icing of the air conditioner evaporator:

1. Refrigeration frostingRefrigeration frosting is located in the evaporator of the indoor unit. When refrigerating, the outdoor unit dissipates heat, the indoor unit absorbs heat, the purpose of the evaporator is to absorb heat (cooling), and the absorption of heat requires air circulation, and the conduction of air is used to take away the heat, when the air circulation is insufficient, the evaporator will frost. The reason for the lack of air is often that the filter screen is not cleaned or the heat sink of the evaporator is not cleaned, which hinders the air flow.

2. Heating and frosting is located on the evaporator of the outdoor unit, when the heating mode is turned on, the outdoor unit absorbs heat and the indoor unit dissipates heat. When the heating mode is activated, the outdoor temperature is below 10 degrees, the outdoor temperature is low, and the outdoor unit still needs to absorb heat, the temperature of the evaporator body will drop to below 0 degrees, and the surrounding moisture (similar to dehumidification during refrigeration) will soon condense into frost. Hope it helps.

I wish you good health and a happy life!

What is the reason for the old freezing of the air conditioner evaporation tank? Hello dear, the reasons for the freezing of the air conditioner evaporator: 1. Refrigeration frosting Refrigeration frosting is located in the evaporator of the indoor unit.

When refrigerating, the outdoor unit dissipates heat, the indoor unit absorbs heat, the purpose of the evaporator is to absorb heat (cooling), and the absorption of heat requires air circulation, and the conduction of air is used to take away the heat, when the air circulation is insufficient, the evaporator will frost. The reason for the lack of air is often that the filter is not cleaned or the heat sink of the evaporator is not cleaned, which hinders the air flow. 2. Heating and frosting is located on the evaporator of the outdoor unit, when the heating mode is turned on, the outdoor unit absorbs heat and the indoor unit dissipates heat.

When the heating mode is activated, the outdoor temperature is below 10 degrees, the outdoor temperature is low, and when the outdoor unit still needs to absorb heat and roll bright, the temperature of the evaporator body will drop to below 0 degrees, and the surrounding moisture (similar to dehumidification during refrigeration) will soon condense into frost. Hope it helps. I wish you good health and a happy life!

Hello dear, under normal circumstances, the evaporator is shouting that the key can not be frosted. After frosting, it affects heat transfer, increases thermal resistance, reduces the refrigeration effect and the amount of wind cracking shed, so the evaporator can only condense dew. The causes of frosting are that the adjustment of the expansion valve is too small, the low pressure is too low or the system refrigerant is too little, and the evaporation pressure is too low.