IDX-OM-X011
Chapter
7
Documents
IDF60/70/80/90 Series
7.5
Air and refrigerant circuits and functions
7-5
7.5 Air and refrigerant circuits and functions
IDF190D Compressed Air and refrigerant circuits
IDF240D Compressed Air and refrigerant circuits
Air 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. Finally, the air
exchanges heat with the hot air coming to the air dryer and its temperature increases higher, and it
leaved the air dryer as warm, dry air.
Refrigerant circuit
The fluorocarbon gas (HFC) in the refrigerant circuit is compressed by the compressor and cooled
by the condenser to become liquid. 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 volume
control valve opens when the compressed air has been cooled sufficiently, and prevents
condensed water from being frozen by excessive cooling.
Cooler
Reheater
Auto drain
Drain
Capacity control valve
Pressure switch
Capillary tube
Refrigerant
dryer
Fan motor
Capacitor
High pressure switch
Refrigerating
compressor
Low pressure
switch
Evaporation
thermometer
Air Pressure
gauge
Compressed air inlet
Compressed air outlet
Cooler
Reheater
Auto drain
Drain
Capacity control valve
Pressure switch
Thermostatic
expansion valve
Refrigerant dryer
Fan motor
Capacitor
High pressure
switch
Refrigerating compressor
Low pressure switch
Evaporation
thermometer
Air Pressure
gauge
Compressed air inlet
Compressed air outlet
Sight glass
Accumulator
