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E-mail
15093177890@163.com
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Phone
15093177890
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Address
B06-1 Qidi Zhenghang Intelligent Manufacturing Industrial Park, Intersection of Xinxiang Road and Luoning Road, Shangjie District, Zhengzhou City, Henan Province
Zhengzhou Kewangda Biological Instrument Co., Ltd
The process flow and wide application of laboratory small freeze-drying machine
Date: 2025-07-01Read: 14
The laboratory small freeze dryer utilizes low-temperature vacuum drying technology, mainly based on the three state changes of water (liquid, solid, and gas) to achieve material dehydration. The core process is divided into four steps:
1. Pre freezing stage: The material rapidly freezes in a low-temperature environment, causing the internal moisture to condense into small ice crystals, avoiding damage to the material structure.
2. Vacuum stage: The pressure inside the drying chamber is reduced to an extremely low level (usually under the action of a vacuum pump) to lower the sublimation temperature of ice crystals.
3. Sublimation stage: Under vacuum and mild heating conditions, ice crystals directly sublime into water vapor without going through a liquid state, and are collected and discharged through a condenser to retain the original activity of the material.
4. Analysis drying stage (optional): For materials containing bound water, further heat up and maintain vacuum to thoroughly remove residual moisture.
In this process, the freeze-drying machine consists of a drying oven, refrigeration system, vacuum system, heating system, and control system, which work together to achieve precise temperature and pressure control.
Small freeze-drying machines play a key role in multiple scientific and industrial fields due to their high efficiency in retaining material activity, stable structure, and portability
1. Biomedical research: used to preserve proteins, enzymes, vaccines, and cell samples (such as DNA, RNA), prevent degradation, and maintain biological activity, suitable for drug development and long-term storage of biological products.
2. Food Science: Applied to freeze-dried fruits, vegetables, and meat, preserving natural color, flavor, and nutrition, extending shelf life without preservatives, and supporting the development of healthy food.
3. Chemistry and Materials Science: Drying thermosensitive chemical reagents (such as pharmaceutical raw materials) to prevent oxidation and deterioration, while controlling humidity sensitivity in the preparation of electronic devices and metal powders.
4. Environmental Science: Processing soil or water samples to remove moisture and maintain component stability for subsequent pollutant analysis.
5. Daily laboratory applications: Used in small research teams for specimen preparation (such as plant tissue), reagent preservation, and teaching experiments, supporting innovative research (such as genetic engineering).
Overall, laboratory small freeze dryers have become a core tool for scientific research and innovation due to their advantages in low-temperature operation and multifunctionality, promoting cross disciplinary technological development.
