(1) the storage temperature of the fresh-keeping storehouse is generally 0 ℃ ~ 5 ℃, which is mainly used for fresh-keeping, to maintain the original quality and freshness of the products to the greatest extent, the living body of agricultural products should not die as far as possible, and the cells should be in a dormant state in the process of cold storage, so as to reduce the loss of nutrition and keep the fresh quality. This is generally used in fruit and vegetables. Nowadays, the fruit and vegetable industry is centralized planning. In the process of transportation and sale, it is inevitable to use cold storage to maintain the nutrition of fruit and vegetables.

Characteristics of fresh-keeping cold storage:

Wide application: suitable for storage of all kinds of fruit, vegetables, eggs, flowers, saplings and other fresh storage.

The storage and preservation time is long, the economic rate is high, the investment in that year is effective, such as 7 months of grape preservation, but the price of grape producing area is only 1.5 yuan per kilogram, and the price before and after the Spring Festival can be 6 yuan per kilogram, there are 6 months of Apple preservation, 7 months of garlic moss preservation, etc., the quality of cold storage can be as fresh as before, the total loss rate is less than 5%, and the cold storage can be built in one time Cold storage, the operation life can be as long as 30 years, the economic benefits are very significant.

The operation technology is simple and the maintenance is convenient. The temperature of refrigeration equipment is monitored by micro-computer, which can automatically start and stop the machine without special person’s supervision. The supporting technology is economical and practical.

Generally, there are various kinds of fresh-keeping warehouses, such as fresh-keeping cold storage and air-conditioned fresh-keeping warehouse. Taking the most advanced air-conditioned warehouse as an example, it can not only regulate the temperature and humidity in the warehouse, but also control the content of oxygen, carbon dioxide and other gases in the warehouse, so that the fruits and vegetables in the warehouse are in a dormant state, and remain the original quality after leaving the warehouse. The biggest characteristic of the air-conditioned fresh-keeping storehouse is applied the freshness of food to a great extent.