Walk-in cold storage is mainly used for the thermostatic storage of all kind of food,like dairy products, meat, fish, poultry, fruits and vegetables, drinks, flowers, plants, tea,and other items like medicines, chemicals, electronic equipment and other instruments . Walk-in cold room is actually a low-temperature air-conditioning equipment。Comparing with the housewold refrigerators, the cooling area of a walk-in cold room will be much larger, but with same refrigeration principle.