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Principe de fonctionnement de la machine de lyophilisation sous vide

Durée: 2019-08-19

As is known to us, the vacuum Freeze Dry Machine is suitable for drying high-grade raw materials, traditional Chinese medicine decoction pieces, biological, wild vegetables, dehydrated vegetables, food, fruits, chemicals, pharmaceutical intermediates and other materials. Freezing vacuum drying is a new type of box structure that combines the refrigeration system, vacuum system, heat transfer oil heating system and dehumidification system into a vacuum freeze dry machine.

Freeze drying refers to the process of removing moisture or other solvents from frozen biological products by sublimation. Sublimation refers to the process of solvents, such as water, like dry ice, which change from a solid to a gaseous state without going through a liquid state. The product obtained by freeze drying is referred to as a Vegetable Drying Machine, and the process is referred to as lyophilization.

Traditional drying can cause the material to shrink and damage the cells. The structure of the sample is not destroyed during the freeze drying process because the solid component is supported by the firm ice at its location. When the ice sublimes, it leaves pores in the dry remaining material. This preserves the biological and chemical structure of the product and the integrity of its activity.

In the laboratory, freeze drying has many different uses and is indispensable in many biochemical and pharmaceutical applications. It is used to obtain biological materials that can be preserved for a long period of time, such as microbial culture, enzymes, blood, and pharmaceuticals, in addition to long-term preservation stability, retaining its inherent biological activity and structure.

To this end, freeze drying is used to prepare tissue samples for structural studies (eg, electron microscopy studies). Freeze drying is also used in chemical analysis to obtain dried samples or to concentrate samples to increase analytical sensitivity. Freeze-drying stabilizes the sample components without changing the chemical composition, making it an ideal analytical aid. Freeze drying can occur naturally. In the natural case, this process is slow and unpredictable. Through the freeze-drying system, people have improved and subdivided many steps to speed up the process.