Equipment principle

The basic principle of a freeze dryer is based on the three-state changes of water. Water exists in solid, liquid and gaseous states. This device has three phases that can not only convert to each other but also coexist. When water is at the triple point (with a temperature of 0.01℃ and a vapor pressure of 610.5Pa), water, ice and vapor can coexist and be in equilibrium with each other. Under high vacuum conditions, the principle of sublimation is utilized to remove the moisture in the pre-frozen material directly from the ice state to water vapor without going through the melting of ice, thereby achieving the purpose of freeze-drying.

Equipment overview

Vertical door opening structure, which can achieve in-situ freeze-drying of materials.

PLC+touch screen design, real-time recording of multiple temperature data during the freeze-drying process.

The temperature control curve of the shelf can be preset to achieve the automation of the sublimation process

This machine is composed of multiple systems such as a refrigeration system, vacuum system, heating system, cooling system, spray system, and electrical control system. Its structure is complex, and there are many interlocks and closures in the control programs.