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Vegetable Drying Machine Has Obvious Advantages
There are many methods of Freeze Dry Machine, such as sun drying, boiling drying, drying, spray drying and vacuum drying, but common drying methods are usually carried out at temperatures above 0℃ or higher.  The products obtained by drying generally have the problems of volume reduction and texture hardening. Most volatile components will be lost. Some heat-sensitive substances will undergo denaturation and deactivation, and some substances even undergo oxidation.  Therefore, the dried products are quite different in character from those before drying.  The freeze-drying rule is basically carried out below 0℃, i.e. in the frozen state of the product. Only when the residual moisture content of the product is reduced in the later stage can the product be raised to a temperature above 0℃, but generally not more than 40℃.  Under vacuum conditions, when water vapor sublimates directly, the drug remains in the frozen ice shelf, forming a spongy porous structure, so its volume size is almost unchanged after drying.  Before reuse, water for injection is added and dissolved immediately.  Compared with conventional methods, Vegetable Drying Machine with freeze-drying function has the following advantages:
1. Many thermosensitive substances will not undergo denaturation or inactivation.
2. When drying at low temperature, the loss of some volatile components in the substance is very small.
3. In the freeze-drying process, the growth of microorganisms and the action of enzymes cannot be carried out, so the original properties can be maintained.
4. As drying is carried out in a frozen state, the volume is almost unchanged, the original structure is maintained, and no concentration phenomenon occurs.
5. As water in the material exists in the form of ice crystals after pre-freezing, inorganic salt dissolved substances originally dissolved in water are evenly distributed in the material.  When the products treated by the freeze dryer sublimate, dissolved substances dissolved in water are separated out, thus avoiding the phenomenon of surface hardening caused by the precipitation of inorganic salts carried by the migration of water inside the materials to the surface in the general drying method.

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