In 2019, China's fruit output increased from 54.529 million tons to 142 million tons, an increase of 2.6 times. At present, the storage capacity of fruit is only about 45 million tons, about 31.7% of the total production, of which the refrigeration capacity is about 27 million tons, about 19% of the total production. Therefore, it is necessary to attach great importance to the matching problems of cold room for fruits.
Mechanical refrigeration is to install mechanical refrigeration equipment in the warehouse with good heat insulation performance to control the temperature and humidity in the warehouse, to maintain a suitable storage environment and achieve the purpose of long-term storage of fruits and vegetables. Mechanical cold storage is divided into high-temperature storage at about 0 ° ℃ (Protection fresh storehouses and low-temperature storehouses are lower than - 18 ℃ (freezing storehouse). Mechanically refrigerated storehouse of fruits and vegetables is the high-temperature storehouse.
Heat insulation treatment of reservoir top
1. The thermal insulation layer is directly laid on the top of the cold storage, which is called external insulation on the top of the storage and internal insulation on the inside of the storage.
2. Set up a cabinet floor, and lay the thermal insulation materials in the cabinet floor, generally using loose thermal insulation materials such as expanded perlite or straw.