A cold room is a closed and enclosed space whose temperature and humidity are carefully and continuously controlled, and it is used for freezing and storing various materials such as food products, meat, poultry and fish, dairy products, fruits and vegetables, as well as equipment. Electronic, medical, chemical and pharmaceutical materials are used. In the construction of the cold room and to prevent energy wastage, all sides of the cold room, including its walls, ceiling and floor, should be insulated. The type and thickness of the insulation has a very important effect in preventing energy loss and increasing the life of the refrigeration system, thus preventing corruption and deterioration of stored materials. Depending on the dimensions of the cold room and its load, as well as the type and duration of product storage, the refrigeration capacity of the cold room and, accordingly, the power of the compressor, condenser and evaporator will change. Cold stores work based on the condensation refrigeration cycle, and depending on the required refrigeration capacity, they can be freon, rack or ammonia type. Above-zero cold storage is usually used for storing fruits and vegetables or for short-term storage and distribution of meat, chicken and fish.