Reason: the humidity in the cold storage is relatively high, and the moisture in the air is easy to frost on the surface of the evaporator, causing ice.

Frosting on the evaporator surface of cold storage hinders the conduction and emission of cold energy of refrigeration evaporator (pipeline), which ultimately affects the refrigeration effect.

When the frost layer (ice layer) on the evaporator surface reaches a certain level, the refrigeration efficiency even drops below 30%, which leads to a great waste of electric energy and shortens the service life of the refrigeration system. Therefore, it is necessary to defrost the cold storage at an appropriate time.

Extended data:

Introduction of defrosting principle of evaporator in cold storage;

1, hot air defrosting, hot high-temperature gaseous condensate enters the evaporator without interception, and the temperature of the evaporator rises, so that the junction of frosted layer and cold row melts or peels off. Hot air defrosting is economical and reliable, easy to maintain and manage, and it is not difficult to invest and build. ?

2. Spray water for defrosting, and spray water at room temperature to cool the evaporator to melt the frost layer. Although water spray defrosting has a good defrosting effect, it is more suitable for air coolers and difficult to operate for evaporation coils. You can also spray the evaporator with a solution with higher freezing point temperature, such as 5% ~ 8% concentrated brine, to prevent frosting.

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