Generally, cold room is refrigerated by a refrigerator, using liquid (ammonia or Freon) with a very low vaporization temperature as a coolant to evaporate under low pressure and mechanical control conditions, absorbing the heat in the storage, thereby achieving cooling. Purpose.
The most commonly used is a compression refrigerator, which is mainly composed of a compressor, condenser, throttle valve and evaporation pipe. According to the method of evaporation tube installation, it can be divided into two types: direct cooling and indirect cooling. Direct cooling installs the evaporation tube in the refrigerated warehouse. When the liquid coolant passes through the evaporation tube, it directly absorbs the heat in the warehouse and cools down.
In indirect cooling, the air in the warehouse is sucked into the air cooling device by a blower. The air is absorbed by the evaporation tubes hovering in the cooling device and then sent into the warehouse to cool down. The advantage of the air cooling method is that it cools quickly and the temperature inside the warehouse is relatively uniform. At the same time, harmful gases such as carbon dioxide produced during the storage process can be taken out of the warehouse.
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