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[Chemical Knowledge]：Explore the working principle of vacuum drying oven

Read： 580 Time：19months ago Source：Transform the World with Simplicity

The vacuum drying oven is a device that places the sample in a low-pressure environment, and accelerates the volatilization of moisture in the sample by reducing the pressure and heating, so as to achieve the purpose of drying. Its working principle mainly includes three aspects: vacuum degree, temperature and drying.

vacuum is the basis of vacuum drying oven. In the process of volatilization of the water in the sample, the gas in the environment needs to be discharged to effectively reduce the boiling point of the water and accelerate the volatilization process. Therefore, the degree of vacuum is an important factor affecting the drying effect. The vacuum pump is a key component to reduce the vacuum degree, and its function is to pump the gas in the drying box to form a vacuum environment.

temperature is another important factor affecting moisture volatilization in vacuum drying oven. The sample is in a vacuum environment, and no gas molecules will collide with it, so it needs to be heated to make the water molecules get enough energy to continue to volatilize. The heating temperature needs to be adjusted according to the nature of the sample and the water content, generally between 40~160 ℃.

Finally, drying is the core process in the vacuum drying oven. At a given vacuum and temperature, the moisture in the sample begins to volatilize, the solid portion remains unchanged, and the moisture is evaporated and discharged via the vacuum pump. The drying time depends on the size, shape and moisture content of the sample. Usually, multiple drying is required to ensure complete evaporation of water.

vacuum drying oven is a kind of equipment widely used in scientific research, medical treatment, pharmacy, electronics and other fields, and plays a vital role in these fields. This paper makes an in-depth analysis of its working principle, hoping to provide a more comprehensive understanding and understanding for interested readers.

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