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What should I pay attention to when purchasing a freeze dryer?
The main uses of modern freeze-drying technology are: freeze-drying storage of in vitro biological tissues; freeze-drying preservation of live bacteria; lyophilization of Chinese herbal medicines, western medicines, biological drugs and blood products; freezing of convenience foods, health foods, functional foods Dry storage and transportation; lyophilization preparation of nano ceramic materials and various metal micropowder materials. Therefore, freeze-drying technology has been widely used in the fields of chemicals, food, materials, medicine, and biological products. Vacuum freeze dryer (referred to as freeze dryer) is a device for realizing freeze-drying technology. It is a complex structure machine involving refrigeration, vacuum, thermal, mechanical, fluid, electrical control and pressure vessels.
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What is the role of the pre-cooler of the freeze dryer?
In the freeze dryer, the pre-cooler is not only the refrigeration recovery device of the refrigeration system, but also the low-temperature air regenerator after dehydration. It is a major component of the freeze dryer and is a characteristic condition that distinguishes the freeze dryer from other refrigeration equipment.
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Use Of Food Freeze Dryer
Food Freeze Dryer is currently a more advanced method of material dehydration, the technology is water-containing substances frozen at low temperatures, and then make the water in the vacuum state directly sublimation, and condensation method to capture the sublimation of water vapour, to achieve the purpose of material dehydration and drying. After the food freeze dryer of the material, its physical, chemical and biological state is basically unchanged, the material in the volatile components and heat denaturation of the loss of nutrients is very small, after freeze drying of the material is porous, its volume is basically the same as before drying. Therefore, after adding water, due to the large contact area, it can be recovered very quickly and has a longer preservation period in the sealed container.