What is the fast-frozen snack cold storage structure?
Structure and main equipment of quick-frozen food storage:
1. Cold storage insulation materials and moisture proof layer
A. Cold storage board: pre-produced, with fixed length, width and thickness, which can be selected according to the installation requirements of the library. High and medium temperature cold storage generally choose 10 cm thick plate, low temperature storage and freezing storage generally choose 12 cm or 15 cm thick plate;
B. Cold storage polyurethane spraying foam material: the material is sprayed directly into the warehouse to form polyurethane board with good non-water absorption and thermal insulation, but with high cost.
C. Cold storage polystyrene spray foam material: the material is also sprayed to form polystyrene grease board, which is more absorbent and less insulating than polyurethane board, but has lower cost.
D. The thermal insulation performance of the blast freezer is reduced due to the dampness of the thermal insulation material. Because this should add moistureproof layer on both sides of heat insulation board, also can do outer moistureproof layer only. Moistureproof course is made commonly with bitumen, linoleum, plastic coating, plastic film or metal sheet.
2. Cold storage refrigeration system
A. Compressor in cold storage (more key parts) : generally, the compressor with complete closure is used in small cold storage. Medium – sized cold storage generally USES semi – closed compressor. Semi-closed compressor is used for large cold storage.
B. Cold storage evaporator: in general, the high temperature storage adopts the fan as the evaporator, which is characterized by fast cooling speed, but easy to cause water loss of cold storage; Medium and low temperature cold storage adopts evaporative exhaust pipe made of seamless steel tube, which is characterized by good constant temperature effect and timely cold storage.
C. Cold storage condenser: the condenser can be cooled by air, cooled by water and combined with air and water. Air cooling is limited to small refrigerating units, while water – cooled condensers can be used in all forms of refrigeration.
3. Other accessories of cold storage: temperature control machine, door lock, hinge, handle, etc.