Reasonably adjust the cold storage evaporator and defrost in time

Reasonably adjust the cold storage evaporator and defrost in time Generally speaking, every increase in the cold storage evaporation temperature can save energy Therefore, under the premise of satisfying the low refrigeration process of the product, the evaporation temperature can be increased as much as possible by adjusting the amount of liquid supplied. The thermal resistance of the frost layer is generally much larger than the thermal resistance of the steel pipe. When the thickness of the frost layer is greater than that, its heat transfer efficiency drops by more than that. When the temperature difference between the inside and outside of the pipe wall is 10°C and the storage temperature is -18°C, the heat transfer coefficient of the evaporator of the exhaust pipe evaporator is only about the original after one month of operation. When the frost of the air cooler is particularly serious, not only the thermal resistance increases, but also the air flow resistance increases, and in severe cases, the air will not be able to be supplied, so the surface of the evaporator should be defrosted in a timely manner. In the refrigeration system of large and medium-sized cold storage, hot ammonia (fluorine) frosting and water frosting are generally used instead of the electric heating defrosting method with high energy consumption, while the small Freon refrigeration system can use the electric heating defrosting method to simplify the pipeline However, the appropriate electric heating power should be configured according to the heat required for melting the frost layer.