Floor Type Freeze Dryer

　　The refrigeration system of the floor-standing freeze dryer is a compression type refrigeration system consisting of four basic components: a refrigeration compressor, a condenser, an evaporator, and an expansion valve. They are connected by pipelines to form a closed system. The refrigerant circulates continuously in the system, changes state and exchanges heat with compressed air and cooling medium.
　　Floor Type Freeze Dryer can be dried in a variety of ways, such as drying, boiling, drying, spray drying, and vacuum drying, but common drying methods are usually carried out at temperatures above 0 ° C or higher. The products obtained by the drying of the floor-standing freeze dryer generally have the problems of shrinking volume and hardening of the texture. Most of the volatile components are lost, some heat-sensitive substances are denatured and deactivated, and some substances are even oxidized. Therefore, the dried product has a large difference in properties compared with that before drying. The lyophilization method is basically carried out below 0 ° C, that is, in the state where the product is frozen, and only when the residual moisture content of the product is lowered in the later stage, the product is allowed to rise to a temperature above 0 ° C, but generally does not exceed 40 ° C. Under vacuum conditions, when the water vapor is directly sublimated, the drug remains in the frozen ice shelf, forming a sponge-like porous structure, so the volume after drying is almost constant. Before using it again, as soon as you add water for injection, it will dissolve immediately.
　　The medicine floor-standing freeze dryer includes two parts: western medicine and traditional Chinese medicine. Western medicine freeze-drying has been developed in China, and many larger pharmaceutical plants have freeze-drying equipment. In terms of injection, the freeze-drying process is used more, which improves the quality and shelf life of the drug, and brings benefits to both doctors and patients. There are not many varieties of freeze-dried medicines, the price of products is high, and the drying process of floor-standing freeze dryers is not advanced. In traditional Chinese medicine, it is limited to the lyophilization of a small amount of Chinese medicinal materials such as ginseng, velvet, yam, and Cordyceps sinensis. A large number of proprietary Chinese medicines have not been freeze-dried, which is far from the foreign countries. Japan launched the "Western Medicine" in a few years ago, which changed the method of tanning of traditional Chinese medicine, solved the tradition that traditional Chinese medicine could not be made into injection or tablet, and solved the problem of Chinese medicine not treating acute illness. Therefore, the Chinese traditional medicine freeze-drying process And product research has great potential to dig.

Floor Type Freeze Dryer technology is mainly used in:
(1) freeze-drying of biological products with poor thermal stability, biochemical products, blood products, genetic engineering products, etc.;
(2) To maintain the structure and activity of biological tissues, the treatment of biological tissues such as cortex, bone, cornea and heart valve for surgery; (3) Coffee to maintain food color, aroma, taste and nutrients, and to quickly rehydrate Freeze-drying of seasonings, meat, seafood, fruits and vegetables;
(4) Application in microcapsule preparation, drug controlled release materials, etc. Processing of health products such as ginseng, royal jelly, and turtles and Chinese herbal preparations to maintain the invariability of fresh substances;
(5) Ultrafine powder functional materials such as: optical fibers, superconducting materials, microwave dielectric materials, magnetic powders, and treatment of catalysts capable of accelerating reaction engineering.