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The domestic freeze dryer consists of refrigeration system, vacuum system, heating system and electrical instrument control system. What are the advantages of domestic freeze dryer

1.Freeze drying is carried out at low temperature, so it is especially suitable for many heat sensitive substances. Such as protein, microorganism and so on will not denaturate or lose biological activity. Therefore, it is widely used in medicine.

2. Due to the drying in the frozen state, the volume is almost unchanged, the original structure is maintained, and the concentration phenomenon does not occur.

3. After drying, the material is porous and spongy. After adding water, it dissolves rapidly and completely, and almost immediately returns to its original properties.

4.Since drying is carried out in vacuum with little oxygen, some easily oxidized substances are protected.

5. When dried at low temperature, the loss of some volatile components is very small, which is suitable for drying some chemicals, drugs and food.

6.In the freeze-drying process, the growth of microorganisms and the role of enzymes can not be carried out, so it can maintain the original sex.

7. Drying can remove more than 95-99% of the moisture, so that the dried product can be stored for a long time without deterioration.

Application field of domestic freeze dryer

Freeze drying is a method to freeze the water-containing material in advance, and then sublimate it in vacuum to obtain the dry material. After freeze-drying, the original biological and chemical properties are basically unchanged, and it is easy to keep for a long time. After adding water, it can return to its original form and maintain its original biochemical properties. Therefore, freeze drying technology is widely used in chemical industry, biological products and other fields.

Before using the freeze-drying machine for freeze-drying, put the articles to be dried in the low-temperature refrigerator or liquid nitrogen to freeze the articles completely before freeze-drying. The vacuum pipe is used to connect the freeze-drying machine and the vacuum pump, and the international standard clamp is used at the joint. The clamp contains a sealing rubber ring. Before connection, apply proper amount of vacuum grease on the rubber ring, and then clamp with the clamp. A power socket of the vacuum pump is arranged on the right side board of the main engine to connect the power line of the vacuum pump.

Check the vacuum pump and make sure that it has been filled with vacuum pump oil. Do not run without oil. The oil level shall not be lower than the center line of the oil mirror. Please read the operation manual of the vacuum pump carefully before the first use. The "O" type sealing rubber ring above the cold trap of the main engine should be clean. When it is used for the first time, it can be coated with a thin layer of vacuum grease. The plexiglass cover is placed on the rubber ring and rotated slightly for several times, which is conducive to sealing. Freeze drying machine is widely used in medicine, biological products, chemical industry and food industry. Freeze drying technology is very suitable for heat sensitive substances such as antibiotics, vaccines, blood products, enzyme hormones and other biological tissues.