Prefab cold room is a walk-in storage facility in controlled condition to keep a consistent temperature, Generally divided into fresh cold room（-5℃~+5℃） and freezer cold room(-20℃~-18℃). It is widely used to preserve the quality of stored products like fruit, vegetables, beverages, flowers, beef and chicken meat, seafood, medicine, cheese, eggs and other fresh foods. The applications of cold rooms include foods and beverages packaging, short and long term products cold storage as well as blastfreezing.