Vacuum drying oven working principle and precautions

Vacuum dryer manufacturer analysis: vacuum dryer vacuum box housing needs to be grounded to ensure safe operation. The vacuum box should be used in an environment where the relative humidity is ≤85% RH, there is no corrosive gas around, no strong sensation source and strong electromagnetic field. The vacuum box working room is not subject to explosion-proof, anti-corrosion, etc., and it is not allowed to dry items that are easy, explosive, and prone to corrosive gases. The vacuum pump can't work for a long period of time. Therefore, when the vacuum reaches the demand of dry goods, the vacuum valve should be closed first, then the vacuum pump power supply should be closed. When the vacuum is less than the demand for dry goods, turn on the vacuum valve and the vacuum pump power supply, and continue to vacuum. It can extend the service life of vacuum pump. Vacuum drying is to give the material a specific environment, and use a heat source to accelerate drying. Physically, it can be used to reduce the boiling point of dry water at a flat temperature, so that it can reach the condition of moisture transpiration faster. Typical dry products typically include hot air circulation ovens and electric blast drying ovens; vacuum drying products are vacuum drying ovens.

If the dry items of the vacuum dryer are wet, the filter is taken between the vacuum box and the vacuum pump to prevent the humid gas from entering the vacuum pump and forming a vacuum pump. Dry items, such as dry, are light weight and small in size (small granules). Vacuum barriers should be added to the working chamber to prevent the dry matter from inhaling and damage the vacuum pump (or solenoid valve). The vacuum dryer consists of a refrigeration system, a vacuum system, a heating system, and an electrical appearance control system. The main components of the vacuum dryer are drying ovens, condensers, refrigeration units, vacuum pumps, heating/cooling equipment, and the like. The working principle of the vacuum dryer is to freeze the dried articles to below the triple point temperature, and then directly increase the solid water (ice) in the article to water vapor under vacuum conditions, and remove the articles from the articles to make the articles dry. After the materials are disposed of beforehand, they are sent to the quick-freezing warehouse for freezing, and then sent to the drying warehouse to improve the dehydration, and then packaged in the post-treatment workshop. The vacuum system establishes a low pressure condition for increasing the drying chamber, the heating system supplies the material to increase the latent heat, and the refrigeration system supplies the required cooling capacity to the cold trap and the drying chamber.