Forced circulation ventilation by the fan in the heat preservation closed warehouse makes it form a strong convection negative pressure area. Under the uninterrupted operation of the refrigerator and high-quality control system, the cold air and hot air in the warehouse alternate rapidly. When cold air circulates and convects, the surface temperature of the object rises, and the water in the body leaks out constantly, resulting in the phenomenon of "sweating". Then it is quickly blown away by the cold wind, quickly taking away the moisture on the surface, and forming condensed water through cold drainage and discharging it out of the warehouse. Technical expertise: The heat pump cold air dryer uses the principle of air conditioning dehumidification to force dry air to circulate in the food room, so that its water content is gradually reduced, thus achieving the drying process. Low temperature and low humidity air continuously absorbs moisture on the surface of food in forced circulation. Saturated air passes through the evaporator, is cooled in the evaporator, and water is separated, and the separated water is discharged from the warehouse through the water collecting tray. Cold air drying system is an air convection circulation drying process in a closed environment, and different drying temperatures can be set according to the process requirements, so it is necessary to keep the closed environment warm, and polyurethane insulation warehouse materials are often used. ? Cold air drying is introduced in detail. Drying temperature: 5-40℃ can be set at will to realize constant temperature drying. Three automatic operation modes: refrigeration and drying mode-in high temperature environment, the unit automatically operates refrigeration and drying mode, and the heat generated by the unit is radiated to the outdoor atmosphere through cooling water/outdoor unit; Temperature adjustment and drying mode-when the temperature meets the requirements, carry out constant temperature drying mode; Heating-up drying mode-In low temperature environment, the unit automatically runs heating-up drying mode; Scope of application:

1. Aquatic products: dried grass carp, dried fish, dried carp, dried Wuchang fish and dried small fish. Drying all kinds of seafood;

2. Poultry meat: air-dried chicken, air-dried duck, air-dried goose, air-dried bacon, sausage, air-dried sauce meat, air-dried rabbit meat, air-dried beef, air-dried ham and other meat products;

3. Chinese herbal medicines: bird's nest, notoginseng, dried bacteria, etc.

4. Application of food processing technology: drunken fish processing, sauce duck processing, instant ham processing, cooked food processing, Beijing roast duck processing, Dongpo meat processing, etc.

5. Crop application: seed drying, grain drying, etc.

6. Storage environment control: seed storage, medicinal materials storage, etc.