1 the current situation of the development of domestic refrigerator in 1955, our country began to build the first cold storage, the total capacity of 40000 tons, beginning in 1968, Beijing to build the first fruits of mechanical refrigerator, in 1978 built the first controlling, by the end of 1991, China has built 413 refrigerator. 50000 tons. Introduced by kaifeng air separation group co., LTD., for the first time in 1995 combined controlling in process first, and build the 15 000 t in shandong longkou controlled atmosphere cold storage to be successful, created a large domestic assembly type controlled atmosphere cold storage of successful precedent. In 1997, another 10, 000 tons of gas cooling storage was built in xi 'an, shaanxi province, and the air-tight performance reached the international advanced level. In recent years, the development of cold storage in China has been very rapid, mainly distributed in the main producing areas of fruits and vegetables and the vegetable bases in the suburbs of large and medium-sized cities. According to statistics, the existing 500 tons of refrigeration capacity has reached more than 500, including foreign investment, joint venture and private accounts for about 500000 tons, refrigerator state-owned cold storage more than 450, ten thousand tons of points belong to the trade, agriculture, trade and light industrial systems, including 300 tons of cold storage capacity of more than 300 domestic trade system, which accounts for over 60% of the country's total. China's commercial system has a storage capacity of more than 2 million square meters, and its storage capacity is more than 1.3 million tons. Among them, there are more than 700,000 tons of mechanical refrigeration and more than 600,000 tons of ordinary storage.
The problem of domestic cold storage is that China is a big producer of agricultural products, and the development of cold storage is obviously backward. It is mainly manifested in the following aspects:
(1) low utilization rate of equipment, low utilization rate of space and low annual utilization rate;
(2) some cold storage design is not standard, there are many safety hazards;
(3) backward equipment technology, extensive management and backward refrigeration;
(4) the energy saving measures in cold storage have not attracted enough attention;
(5) large energy consumption of cooling equipment and low automation control;
(6) the defrost period and defrosting time in China's cold storage are generally very long;