Causes that affect the low evaporation temperature of the refrigeration system of the constant temperature and humidity box

Causes that affect the low evaporation temperature of the refrigeration system of the constant temperature and humidity box

Recently, some netizens asked about the main factors for the low evaporation temperature of the refrigeration system of the constant temperature and humidity box. Today, the editor reviewed the information on the Internet and the usual maintenance experience, organized the following content, friends in need hurry up and collect it!

　　1) The refrigerant in the refrigeration system of the constant temperature and humidity box is insufficient.

　　2) The throttle valve is opened too small, the amount of refrigerant flowing into the evaporator is insufficient, most of the space of the evaporator refrigerant vapor is overheated, the cooling capacity drops, and the evaporation pressure also drops.

　　3) The refrigeration system of the constant temperature and humidity box is clogged with dirt. Especially in the Freon system, the dirt will block the drying filter and the thin pipes, and the system contains water, which will cause the expansion valve to block the ice.

　　4) The solenoid valve does not work, or the relevant valve is not opened.

　　5) Frosting or icing on the surface of the direct evaporative cooler increases the heat transfer resistance and affects the heat transfer effect. The evaporation temperature is gradually reduced, thereby reducing the evaporation pressure.

　　6) The area of the evaporator does not match the cooling capacity of the compressor, that is, the evaporation area of the evaporator is too small.

　　7) The cooling water of the water cooling system is excessive and the amount of refrigerant is too small. For this, the flow of cooling water and refrigerant must be adjusted.

　　 8) The load adjustment switch is not open enough, and the cooling capacity of the refrigeration equipment is greater than the required heat load.

　　 When the evaporation temperature of the constant temperature and humidity box is too low, the cause should be found out and the unit operation should be adjusted to a reasonable state.