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IDX-OM-M051
Air Dryer
6. Reference
6.5 Pneumatic and refrigerant circuits and their functions
6 - 7
IDF100F~150F-W
6.5 Pneumatic and refrigerant circuits and their functions
Pneumatic circuit
The humid hot air that enters the air dryer first goes into the reheater, and exchanges its heat with
dehumidified cold air to pre-cool it. Then, the air enters the evaporator, where it releases its heat to
a cold HFC, and is dehumidified and cooled further to let moisture separate. After that, the air
exchanges its heat with hot air that enters the air dryer at the reheater, and is heated and its
temperature increases. Finally, the air is further heated at the reheater and its temperature
increases higher, and it leaves the air dryer as warm, dry air.
Refrigerant circuit
The HFC gas contained in the refrigerant circuit is compressed by the compressor, and cooled and
liquefied by the condenser. When passing through the capillary tube, the HFC gas is regulated and
its temperature decreases. While passing through the cooler part, it evaporates rapidly, taking the
heat from the compressed air, and is sucked in by the compressor. The capacity regulating valve
opens when the compressed air has been cooled sufficiently, and prevents condensed water from
being frozen by excessive cooling.
air outlet
air inlet
Water pressure
outlet
inlet
Capacity Regulating
valve
compressor
Refrigerating
Evaporation
thermometer
Condensed pressure
gauge
Y-shaped strainer
Cooler reheater
Ball valve
Auto drain
Ball valve
Facility water
regulating valve Facility water
Low press.switch
Second reheater
Air pressure gauge
Filter dryer
Capillary tube
Compressed
Compressed
Drain
High Press.switch
Condenser