Cold room storage refers to facilities used for long-term storage and maintaining low temperatures, typically used to store food, drugs, and other perishable items. It usually consists of insulated walls, floors, and ceilings to prevent heat from entering and maintain low temperatures. The cold air fan is a key equipment in the cold storage, which maintains a constant temperature inside the cold storage by circulating air. The cold air fan sucks in air and cools it through a cooler, then delivers the cold air to the cold storage to reduce the temperature inside the storage. 

The cold room evaporator is another important equipment in the cold storage, mainly used to evaporate the refrigerant and absorb heat from the cold storage. When the refrigerant passes through the evaporator, it absorbs heat from the cold storage and converts it into evaporation. The condensing unit is another type of equipment in a cold storage, mainly used to release the heat absorbed by the evaporator into the external environment. 

The condensing unit compresses the refrigerant and transfers it to the condenser to cool it, thereby releasing heat. The cooled refrigerant enters the evaporator again and circulates through the refrigeration process.