Common cold chain foods include vegetables, fruits, meat and eggs, seafood and aquatic products, quick-frozen foods, vacuum-packed cooked food, ice cream and dairy products, and fast food raw materials. In addition to food, some flowers and medicines can also be stored and transported in cold chain.

Food cold chain refers to a special supply chain system in which perishable food is purchased or caught from the place of origin, and then processed, stored, transported, distributed and retailed until it reaches consumers, and all its links are always in the low temperature environment necessary for products to ensure food quality and safety, reduce losses and prevent pollution.

Extended data:

The food cold chain consists of four aspects: frozen processing, frozen storage, frozen transportation and distribution, and frozen sales.

(1) Freezing processing: including the cooling and freezing of meat, poultry, fish and eggs, and the processing operation at low temperature; It also includes precooling of fruits and vegetables; Low-temperature processing of various quick-frozen foods and dairy products. In this link, the cold chain is mainly equipped with cooling, freezing and quick freezing devices.

(2) Frozen storage: including food cold storage and frozen storage, as well as modified atmosphere storage of fruits and vegetables, in order to ensure the low-temperature fresh-keeping environment of food during storage and processing. This link mainly involves various refrigeration/processing rooms, freezers, freezers, household refrigerators, etc.

(3) Refrigerated transportation: including the low temperature state of food logistics links such as medium and long-distance transportation and short-distance distribution. It mainly involves railway refrigerated trucks, refrigerated trucks, refrigerated ships, refrigerated containers and other low-temperature transportation tools. In the process of refrigerated transportation, temperature fluctuation is one of the main reasons for the decline of food quality. Therefore, long-distance transportation is particularly important for vehicles to have good performance and maintain a stable temperature.

(4) Frozen sales: including the frozen storage and sales of all kinds of cold chain foods entering the wholesale and retail links, which are jointly completed by manufacturers, wholesalers and retailers. With the rapid development of various supermarket chains in large and medium-sized cities, various supermarket chains are becoming the main sales channels of cold chain food. In these retail terminals, a large number of refrigerated/frozen display cabinets and storage warehouses are used, which gradually become an indispensable part of the complete food cold chain.