Reasons for abnormal evaporation temperature of refrigeration equipment

Reasons for abnormal evaporation temperature of refrigeration equipment

1. The evaporation temperature is low

　　 There are many reasons for the low evaporation temperature. The mechanism that leads to the low evaporation temperature is that there is less refrigerant in the evaporator or poor heat exchange in the evaporator, as listed below:

　　 1. The expansion valve opening is too small

　　2, the refrigeration system lacks refrigerant

　　3, the capillary or expansion valve is blocked

　　4, the filter is clogged

　　 5. Insufficient air volume of the internal machine

　　6, the evaporator is severely frosted

　　1~4 points mainly analyze from less refrigerant analysis, 5~6 mainly analyze the poor heat transfer of the evaporator;

　　 2. The evaporation temperature is too high

　　The main reasons are as follows

　　 1. Expansion valve opening is too large

　　2, too much refrigerant

　　 3. There is air in the system

　　 4. The evaporator outlet is blocked

　　5, the condensation effect is not good

　　6, the compressor has low efficiency or low speed

　　7, the compressor valve is broken or leaking

　　 8. The heat load is too large

　　Ⅲ Of course, there are many other reasons. It is recommended to consider three aspects

　　 1. There is too much refrigerant in the evaporator

　　2, the condensing pressure is high

　　3, the compressor speed is low