The use of refrigerated containers as simple cold storage is due to a lack of clear understanding and confusion of their main functions and roles. Many people have a misconception about refrigerated carriages, believing that the refrigeration unit can freely freeze and heat the goods loaded into the carriage to the desired temperature.

Therefore, goods that are not satisfied with the temperature requirements are always loaded into the carriage, and the refrigeration machine is set to the required temperature value, thinking that the goods can be lowered to the required temperature in some time. However, the fact is that the temperature of the goods not only cannot be lowered or raised, but also leads to loss and deterioration of the goods.

However, the essential difference between cold storage and refrigerated carriages is their function. Cold storage is divided into storage and quick freezing warehouses, which quickly freeze goods limited by temperature to the required temperature range for long-term storage.

Refrigerated carriages only ensure that the goods are always within the appropriate temperature range during transportation between warehouses. The external conditions of the refrigerated compartment are constantly changing, and the equipment is always in operation with almost zero supporting facilities, making it difficult to control various problems.

The refrigeration effect is different. Currently, there are two main types of refrigerants for refrigeration and freezing equipment in China: liquid ammonia and Freon. At present, large cold storage refrigeration generally uses ammonia refrigeration, while small cold storage uses fluorine. The power source of the cold storage refrigeration machine is electrical energy, with a power of several hundred to several thousand KW. The refrigerated carriages all use fluorine systems, and the power source of the refrigeration machine is gasoline and diesel engines, with a power of several hundred to several thousand KW.

Therefore, the power of the cold storage refrigeration machine is fast and effective, while the refrigeration system of the refrigerated compartment is compact and has a small cooling capacity, which can only ensure that the temperature of the goods inside the compartment is not affected by the external temperature. Another important point is that.

Due to the thickness of the insulation wall of the cold storage being much greater than that of the refrigerated compartment, the insulation effect of the cold storage is much better than that of the refrigerated compartment. Although the refrigerated compartment cannot be used as a cold storage, the two complement each other on the cold chain and are indispensable.