Since the 1980s, there has been a phenomenon in the construction of China's cold storage, and a number of “cold storage groups” consisting of several units of 10,000-ton cold storage have been built, which is beneficial to reducing construction costs, operating energy consumption, and standardizing management. And formed a number of "aircraft carrier" enterprises in China's refrigeration industry.

However, with the changes in the structure and packaging of food in China, especially the rapid development of the small-pack frozen food industry, the food freezing method has undergone major changes. From the 1950s and 1960s, it was widely used intermittently and slowly. The warehouse-type and shelf-type freeze rooms have been replaced by fast, continuous freezing devices (tunnel, spiral, fluidization, etc.). The freezing chamber temperature has dropped from -33 to -35 °C to -40 to -42 °C, thus speeding up the freezing rate and improving the quality of the frozen product.

In the past, large and medium-sized cold storages basically used centralized liquid pump forced circulation liquid supply systems. In recent years, for food refrigeration warehouses with various evaporation temperatures, the distributed direct expansion system has a simple system and a short construction period. The advantages of easy self-control are also widely used.

In 2016, the No. 1 Document of the Central Government continued to lock in modern agricultural construction. The document pointed out that the construction of a cross-regional cold chain logistics system should be accelerated, and the construction of cold storage will soon usher in a new round of construction and transformation. What kind of cold storage is the direction of state support? I suggest that you pay more attention to some policies issued by the recent countries. From these policies, we can see the guiding direction of the future development and construction of cold storage.

Cold storage

With the sustained and rapid development of China's economy and the significant improvement of people's living standards, the consumption scale of fresh agricultural products in China has grown rapidly, and residents have placed higher demands on the diversification, freshness and nutrition of agricultural products, especially for food. The level of safety concerns has been continuously improved. Accelerating the development of combined cold storage of agricultural products, cold storage of civil works, freezer and cold storage has become a necessary means to improve the consumption quality of agricultural products, reduce nutrient loss and ensure food safety, and is a necessary guarantee to meet consumer demand. . Residents' demand for frozen and refrigerated products is correspondingly higher and higher, and China's position in the world economic system is becoming more and more important. The continuous expansion of domestic import and export business has created a very rapid development of the refrigeration and refrigeration industry. Good opportunity.

For a long time, China's agricultural products have suffered serious post-harvest losses. The circulation rate of fruits, vegetables, meat and aquatic products has reached 20-30%, 12% and 15% respectively. The annual loss of fruits and vegetables alone has reached more than 100 billion yuan. Fresh agricultural products are restricted by fresh-keeping storage and transportation capacity after the listing, and the contradiction between the “selling” of agricultural products and seasonal fluctuations in prices is prominent. The situation that farmers increase production without increasing income sometimes occurs. The development of cold storage of agricultural products combined cold storage, civil cold storage, freezer and cold storage is not only an important measure to reduce post-harvest losses of agricultural products, indirectly save agricultural resources such as cultivated land, and promote sustainable development of agriculture, but also to promote balanced sales of agricultural products across seasons and promote farmers' stability. An important way to increase revenue.