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The core of Freeze drying machine
2026-05-28
Freeze drying machine is an industrial grade freeze dryer, mainly composed of the following four core systems: refrigeration system: the "heart" of the equipment, responsible for providing a low-temperature environment. It includes a refrigeration device for pre freezing materials and a cold trap (water trap) for capturing water vapor. High quality freeze-drying machines usually use two-stage screw compressors, which have fast cooling speed and energy saving. The cold trap temperature usually needs to reach -40 ℃ to -80 ℃. Vacuum system: composed of a vacuum pump group and a vacuum chamber, responsible for establishing a high vacuum environment in the drying chamber (usually the vacuum degree needs to be controlled between 10-100Pa). Only under low pressure can ice crystals sublime directly into water vapor without melting. Heating/circulation system: including material partitions (layers) with heating function and circulating medium. Its function is to provide precise and uniform heat to the material during the sublimation stage, promoting the continuous sublimation of moisture. Electrical Control System (PLC): The "brain" of equipment. Modern Freeze drying machine commonly use PLC intelligent integrated automatic control, which can accurately set and monitor parameters such as pre freezing rate, sublimation pressure, and partition temperature, achieving fully automated operation without the need for long-term manual duty..
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