Freeze Dryer

The amount of water vapor in the compressed air is determined by the temperature of the compressed air: while keeping the compressed air pressure basically unchanged, lowering the temperature of the compressed air can reduce the water vapor content in the compressed air, and the excess water vapor will condense Into liquid. 

The freeze dryer uses this principle to use refrigeration technology to dry compressed air. Therefore, the refrigeration dryer has a refrigeration system. The refrigeration system of the freeze dryer belongs to compression refrigeration, which is composed of four basic components such as a refrigeration compressor, a condenser, an evaporator, and an expansion valve. 

They are connected in turn with pipes to form a closed system. The refrigerant circulates continuously in the system, changes its state, and exchanges heat with the compressed air and cooling medium. Compressed air dryers also include adsorption dryers and dissolution dryers.