The cold storage is mainly used as a constant temperature storage air-conditioning equipment for food, dairy products, meat, aquatic products, chemicals, medicine, nursery, scientific experiments, etc. The cold storage is actually a kind of low-temperature cold storage (refrigerator) which is also a kind of refrigeration equipment and refrigerator. In comparison, the cooling area is much larger, but they have the same cooling principle.
The concept of freezer and cold storage is rather vague. They are usually distinguished by the use of cold storage and the thermal load characteristics in the warehouse. For the heat in the warehouse, the heat is mainly sensible, and the cold storage of the food in the food is not used. In the case of a cold storage, the cold storage of the heat in the storage is mainly used, and the cold storage which aims to change the moisture in the food in the storage is called a freezer. Generally, the temperature difference between the cooling and the cold storage is relatively large, and it is a variable operating condition, and the configured cooling capacity is also much larger than that of the refrigerator. The operating temperature difference range of the refrigerator is relatively small, which can be understood as a fixed operation, and the cooling configuration is much smaller than that of the refrigerator. Of course, from the economic point of view, the refrigerator also has the ability to freeze, just because the cooling capacity is small, the refrigeration capacity is limited, and the cold storage is also used in the cold storage.
The difference between cold storage
The storage temperature of the refrigerator is generally between -15 ° C and -18 ° C. Generally, the food is gradually put into the cold storage from time to time. After a period of time, the temperature of the cold storage reaches -18 ° C, and the picking up is also irregular and irregular. For example, meat, the storage temperature of aquatic products has higher requirements, keeping the meat from deteriorating. Moreover, in the process of sale, it is also necessary to take out the storage from time to time. Generally, the cold storage in the large supermarket is a cold storage.
The difference between freezer libraries.
The storage temperature of the frozen low temperature cold storage is generally -22 to -25. With a variety of refrigeration equipment, artificial cooling, the room to maintain a certain low temperature. Many foods such as ice cream, seafood, etc. need to be stored at -25 ° C to not deteriorate, such as ice cream storage does not reach -25 ° C, the fragrance is gone; seafood taste and taste will be much worse. Compared with the fresh storage, the freezer has a very different effect. Too low temperature will cause the death of vegetable and fruit cell tissue, and the freshness will be greatly affected. Therefore, for the storage of fruit and vegetable meat, the temperature is not the more The lower the better.
The traditional civil cold storage represented by international low-temperature logistics has been transformed according to the needs of the market and logistics. The temperature zone of the refrigeration has been widened and the closed low-temperature platform has been reconstructed.