What Is Cold Storage?

Cold storage (English: Cold Store) is a type of refrigeration equipment. Cold storage refers to the use of artificial means to create an environment different from outdoor temperature or humidity. It is also a constant temperature and humidity storage device for food, liquid, chemical, pharmaceutical, vaccine, and scientific experiments. Cold storage is usually located near a shipping port or place of origin. Compared with refrigerators, refrigerators have a larger cooling area and have a common cooling principle.

Basic Information

Chinese name: Cold storage
Foreign name: Cold Store
Use: Refrigerated items

temperature range: 5 ° ~ -30 °
Origin: icehouse
Principle: Cold storage

Since the end of the 19th century, cold storage has been

General cold storage

Cold storage is actually a low temperature

Cold storage and cold storage

The cooking ingredients and foods in the cold storage contain a certain amount of fat, protein and starch. These nutrients

The presence of will cause a large number of molds and bacteria to multiply and grow. In order to do a good job in hygienic management of cold heading and ensure the refrigeration quality of food and cooking ingredients, it is necessary to carry out sanitary disinfection of cold heading regularly. For the removal of mildew, mildew and disinfection in cold storage, an acid disinfectant can be used first.

The bactericidal effect of acid disinfectants is mainly the protein in coagulated bacteria. Common disinfectants include lactic acid, peroxyacetic acid, bleaching powder, formalin and the like. The specific method is: after the fish is out of the cold storage, the frost layer on the evaporation tube group is cleaned, and the temperature of the storage room is kept below 50 ° C. Then, each cubic meter of the cold storage room is prepared with 50 to 100 grams of vinegar and used a spray Spray into the storeroom, close the storeroom door tightly, and then turn on the blower intermittently to let the vinegar volatilize and flow in the storeroom, so that the vinegar absorbs the fishy smell in large quantities.

Method for eliminating odor in cold storage

The reason for the odor in the cold storage is the so-called odor, that is, the cooking ingredients and food in the cold storage are affected by external factors, and through physical and chemical changes, an abnormal odor is generated. Over time, this odor adheres to the wall of the cold storage. , Ceilings and equipment and tools. There are several reasons for odors in cold storage: Generally, there is an odor in cold storage before entering the food. Before entering the cold storage, the food has spoilage, such as spoiled eggs, meat, and fish. In cold storages where fish has been stored, food such as meat, eggs or fruits and vegetables is stored without cleaning, which can cause odor infection and deterioration. The cold storage is not well ventilated, and the temperature and humidity are too large, which causes the mold to multiply and produce a moldy smell. Leakage of cold storage refrigeration pipelines, refrigerant (ammonia) eroded into food and caused odor. The temperature in the freezer does not drop, causing the meat to spoil and produce a rotten taste. This situation often occurs when fresh meat is not frozen and frozen and then transferred to storage. Foods with different odors exist in a cold storage warehouse to prevent odors in the cold storage. Foods that are stored in the cold storage must be inspected, and they must not be put into storage until they have deteriorated. There should be no odor in the cold storage warehouse before receiving goods.
If there is an odor, it must be treated by technology, and the odor can be eliminated before use. It is usually necessary to strengthen the maintenance of refrigerating equipment, and it is strictly forbidden to dump and unload, to prevent smashing pipelines and causing leakage of refrigerant. During the cold processing of food, the cold storage room must be kept at a certain temperature, and frozen food must not be transferred to or stored in the warehouse. If the temperature of the cold storage room cannot be lowered, the cause should be found, and the food processing should be performed after being eliminated. Foods infected with each other must not be mixed in the cold storage.
The method of eliminating odor in cold storage is ozone method. Ozone has a strong oxidizing effect, which can not only eliminate the odor of the cold storage warehouse, but also prevent the growth of microorganisms. Ozone generator can be used to eliminate odor in the warehouse. If foods containing more fat are stored in the cold storage, it is not suitable to use ozone treatment, so as to avoid rancidity caused by oxidation of fat.
Formaldehyde method: remove the goods in the cold storage warehouse, disinfect with 2% formaldehyde aqueous solution (formalin solution) and eliminate odor.
Vinegar: Cold storage room with fish, the fishy smell is very strong. It is not advisable to load other foods, and other foods must be cleaned thoroughly to eliminate fishy smell. The general method to remove fishy odor is to use vinegar.