The working principle of a freeze-drying machine

The working principle of a freeze dryer is to freeze the dried item below the triple point temperature, and then under vacuum conditions, the solid water (ice) in the item is directly sublimated into water vapor, which is removed from the item to dry it. After pre-treatment, the material is 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 cooling capacity to the cold trap and drying chamber. This equipment adopts efficient radiation heating, and the materials are evenly heated; Adopting an efficient water trap and achieving rapid defrosting; Adopting an efficient vacuum unit that can achieve oil-water separation; Adopting a parallel centralized refrigeration system with multi-channel on-demand cooling, stable working conditions, and favorable energy conservation; Adopting artificial intelligence control, with high control accuracy and convenient operation.