Principle of vacuum freeze-drying: According to the phase equilibrium theory in thermodynamics, the triple point of water (coexistence of steam, liquid and solid three phases) is 0.0098 °C, and the pressure of triple point is 609.3pa (4.57mm/mg) in water. In the phase transition process, when the pressure is lower than the pressure of the triple point, the solid ice can be directly converted into gaseous water vapor, that is, the ice crystal progresses....

Beijing Songyuan Laboratory small series in-situ vacuum freeze dryer adopts air-cooled condensing refrigeration system....

Conventional air drying and drying methods tend to make large changes in the microstructure of the soil, which cannot meet the test accuracy of microstructure research. The soil samples prepared by vacuum freeze-drying through a soil freeze dryer ensure that the microstructure of the soil samples does not change after dehydration....

The small freeze dryer is a kind of vacuum freeze dryer. Because of its small size, it is suitable for freeze-drying of samples of conventional medicines, food, chemicals, new materials, etc., and is widely used in laboratories and scientific research places. Small freeze dryers can be divided into bench and vertical. Both desktop and vertical small freeze dryers are available in a common, gland-type, multi-manifold type....

The advantages and market prospects of the lyophilizer in the field of beauty and cosmetics biology! Freeze dryer manufacturer/supplier Beijing Songyuan Huaxing summarizes for you as follows:...