Cold Storage Introduction

Since the end of the 19th century, cold storage has always been an important part of the logistics industry. Cold storage is mainly used for the constant temperature and humidity storage of semi-finished products and finished products such as food, dairy products, meat, aquatic products, poultry, fruits and vegetables, beverages, flowers, green plants, tea, medicines, chemical raw materials, electronic instruments, tobacco, alcoholic beverages, etc. The cold storage is a kind of refrigeration equipment. Compared with the refrigerator, the refrigeration area is much larger, but they have the same refrigeration principle.

Generally, cold storages are mostly refrigerated by refrigerators, using liquid with a very low vaporization temperature (ammonia or Freon) as a coolant to evaporate under low pressure and mechanically controlled conditions, and absorb the heat in the storage to achieve cooling and cooling. purpose.

The most commonly used is a compression refrigerator, which is mainly composed of a compressor, a condenser, a throttle valve, and an evaporation tube. According to the method of the evaporation tube device, it can be divided into 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 to cool down.

Indirect cooling is that the air in the warehouse is sucked into the air cooling device by a blower. After the air is absorbed by the evaporating tube in the cooling device, it is sent into the warehouse to cool down. The advantage of the air cooling method is that the cooling is rapid, the temperature in the warehouse is relatively uniform, and at the same time, harmful gases such as carbon dioxide generated during the storage process can be taken out of the warehouse.