Correct Use of the Freezer High-Speed Door Cold storage is mainly composed of the storage body, refrigeration system, cooling system, control system, and insulation door of the cold storage. The storage body is mainly used to ensure heat insulation and moisture insulation between the storage and the outside and to separate multiple areas. All of these are to ensure the indoor temperature and humidity. The cooling system is mainly used for the cooling function of cold storage. As a part of the cold storage workshop, the high-speed door of the cold storage plays a very important role. The fastest opening speed of the freezer high-speed door is 2 meters per second, and the fastest closing speed is 0.58 meters per second.