空气冷冻干燥机的保养可以做到这些点，并且可以长期使用。

　　Vacuum freeze dryer is composed of refrigeration system, vacuum system, heating system, electrical instrument control system. The main components are drying oven, condenser, refrigeration unit, vacuum pump, heating/cooling device, etc. The working principle is to freeze the dried item to below the triple point temperature, and then directly sublime the solid water (ice) in the item into water vapor under vacuum conditions, remove it from the item, and dry the item. After pre-processing, the materials are sent to the quick-freezing warehouse for freezing, then sent to the drying warehouse for sublimation and dehydration, and then packaged in the post-processing workshop. The vacuum system establishes low-pressure conditions for the sublimation drying chamber, the heating system provides sublimation latent heat to the material, and the refrigeration system provides the required cold energy to the cold trap and the drying chamber. The vacuum freeze dryer adopts radiation heating, and the material is heated evenly; it adopts a water trap and can realize rapid defrost; adopts a vacuum unit, and can realize oil-water separation; adopts a parallel centralized refrigeration system, multi-channel cooling on demand, and stable working conditions , Which is conducive to energy saving; adopts artificial intelligence control, high control precision and convenient operation.

　　Vacuum freeze dryer has excellent performance, which can make the water in the food directly sublime and dry from the solid state under the conditions of pulping and vacuum, without evaporation from the liquid state. It can preserve the original color, aroma, taste and shape of the food to a large extent, the original nutrients and active substances are rarely damaged, and the rehydration is rapid, no preservatives are needed, and the product is dried by a vacuum freeze dryer. Popular in the market, it mainly includes quick-freezers for freezing materials, drying silos for sublimation and dehydration, and auxiliary systems such as refrigeration, vacuum, and heating.

真空冷冻干燥机保养:

　　 1. Before working, please pay attention to remove the moisture in the cold trap. Dry the cold trap if necessary. It is recommended to open the drain valve before each freeze-drying work, and then close it.

　　 2. Do not switch frequently during use. If the refrigerator stops running due to operating errors and cannot be started immediately, wait at least 20 minutes before starting again to avoid damage to the refrigerator.

　　3. After each freeze-drying, after the ice on the cold trap coil turns into water, clean it with a towel. After the freeze-drying, turn on the "inflation valve" and inflate the cold trap slowly to avoid damage to the vacuum gauge.

　　4. Regularly check the liquefier at the bottom of the machine for dust and dirt. If necessary, the vacuum freeze dryer needs to be cleaned.