The amount of water vapor in the compressed air is determined by the temperature of the compressed air: Reducing the temperature of the compressed air reduces the amount of water vapor in the compressed air while maintaining the constant pressure of the compressed air, and the excess water vapor condenses into a liquid. Freeze Dry Machine uses this principle with refrigeration technology to dry compressed air. Therefore, the Freeze Dry Machine has a refrigeration system.
The refrigeration system of the Freeze Dry Machine is a compression type refrigeration system consisting of four basic components: a refrigeration compressor, a condenser, an evaporator, and an expansion valve. They are connected by a pipe connection to form a closed system in which the refrigerant circulates continuously in the system, undergoes a state change and exchanges heat with the compressed air and the cooling medium.
The refrigeration compressor draws the low-pressure (low-temperature) refrigerant in the evaporator into the cylinder of the compressor, and the refrigerant vapor is compressed, and the pressure and temperature are simultaneously increased; the high-pressure high-temperature refrigerant vapor is pressed to the condenser, and in the condenser, The higher temperature refrigerant vapor exchanges heat with the cooler water or air, and the heat of the refrigerant is taken away by water or air to condense, and the refrigerant vapor becomes a liquid.
This part of the liquid is then sent to the expansion valve, which is throttled into a low-temperature and low-pressure liquid through the expansion valve and enters the evaporator; in the evaporator, the low-temperature, low-pressure refrigerant liquid absorbs the heat of the compressed air and vaporizes (commonly called "evaporation") The compressed air is cooled to condense a large amount of liquid water; the refrigerant vapor in the evaporator is sucked away by the compressor, so that the refrigerant undergoes four processes of compression, condensation, throttling, and evaporation in the system, thereby Completed a loop.
In the refrigeration system of the Freeze Dry Machine, the evaporator is a device for conveying a cold amount, in which the refrigerant absorbs the heat of the compressed air to achieve the purpose of dehydration and drying. The compressor is the heart and acts to draw, compress, and deliver refrigerant vapor.
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Zhejiang Guanfeng Food Machinery Co.,Ltd.
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