Quick-freezing cold storage

Quick-freezing cold storage

Frozen cold storage belongs to the production and processing cold storage, the temperature is usually designed at -30 ℃~-35 ℃, when the food center temperature reaches -18 ℃, when the meat, seafood and other products freeze, there will be physical, cellular, microbial, biological changes, to avoid the formation of large ice crystals between cells, less juice loss when thawed. Frozen food is generally stored in the -18℃ freezer for long-term storage.

Quick freezing cold storage construction features:

(1) Avoid the formation of large ice crystals between cells

(2) Reduce the water in the cell, less juice loss when thawed

(3) The time of contact between concentrated solutes and food tissues, colloids and various components in cell tissues is significantly shortened, and the harm of concentration is reduced to a low degree.

(4) The food is rapidly reduced to the temperature of microbial growth activity, and the growth of microorganisms and their biochemical reactions are favorably resisted

(5) The short residence time of food in the freezing equipment is conducive to improving the utilization rate of the equipment and continuous production

The quick-freezing cold storage reduces the temperature in the storage through the refrigeration system, and uses the cold air circulation to make the air flow quickly and contact with the surface of the food, so as to quickly freeze the food to the required temperature. At the same time, the quick-freezing cold storage also maintains the humidity within the appropriate range through the humidity control device to avoid excessive evaporation of water on the surface of the food.

Retention of nutrients: Rapid freezing can maximize the retention of food nutrients and taste.

Extend shelf life: A stable low temperature environment helps to extend the shelf life of food.

Energy saving and environmental protection: Adopt energy-saving and stable refrigeration system to reduce operating costs and energy consumption.

Quick freezing cold storage construction technology:

1, the library insulation is generally selected polyurethane insulation board, the thickness is 150mm, 200mm, B1 level flame retardant, fast installation, removable mobile, good heat insulation effect, anti-corrosion, service life of up to 10-20 years, according to different plant design size, specifications, divided.

2, frozen cold storage select microcomputer control system, liquid crystal display library temperature, boot time, chemical box time, fan delay time, alarm indication and various technical parameters, one-button boot, automatic temperature control, frozen cold storage refrigeration equipment selection, generally DJ series ceiling or floor type chiller, small frozen cold storage selection of bipolar refrigeration compressor, Large quick-freezing cold storage selection of low temperature screw compressor units, brand Leng Di mainly choose Bitzer, valley wheel, Fusheng and other well-known brand units. The main core of the quick-freezing cold storage is the refrigeration equipment, so try to choose a unit with better stability and high efficiency and energy saving to ensure that the freezing speed can reach the standard during use and the freezing effect is good enough.

3, frozen cold storage supporting facilities, frozen cold storage is usually equipped with raw materials 0-5℃ fresh-keeping cold storage, finished products -18℃ frozen storage, if it is a slaughterhouse such frozen cold storage may also need to support acid storage, before processing to carry out acid drainage, acid drainage can be built in the same room with meat storage, can also be built separately, The acid discharge warehouse is mainly to add track, lifting, acid discharge equipment, bilateral air cooler, etc., while the slow solution freezer is mainly to add low temperature and high humidity thawing equipment in the warehouse.

The construction of quick-frozen cold storage is difficult, especially in the selection of refrigeration equipment, there is not enough construction experience, it is difficult to choose a reasonable configuration, easy to cause slow cooling speed and high power consumption, it is recommended to choose the right refrigeration company for the construction of quick-frozen cold storage.