HFD-4 home lyophilization homemade food freeze dryer household vacuum pump freeze dryer

The freeze-drying method is to freeze the food first and then sublimate the moisture in the frozen food in a high vacuum environment. Therefore, the dried food maintains its original chemical composition and physical properties. After freezing and fixing, it is not affected by the surface tension during the drying process. The volume of the food is almost the same, loose and porous, and the original structure is maintained, After adding water, the original characters were restored almost immediately.