6. Reference
6 - 4
6.4 Pneumatic and refrigerant circuits and their functions
Pneumatic circuit
High temperature humid air from the air compressor passes through the air re-heater and is
pre-cooled by dehumified cool air. Then it is cooled to the specified temperature by the air cooler
using the evaporation heat of refrigerant. At this time, the moisture generated by condensation are
automatically exhausted by the auto drain. The cooled and heat is exchanged with hot air that flows
into the air re-heater. It is supplied as dry warm air without "sweatuing" in the pipimg system.
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 thermostatic expansion valve, 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.
Compressed
Compressed
air inlet
air outlet
Accumulator
Capacity regulating valve
Automatic water supply valve
Water-cooled condenser
Air cooler
Air re-heater
Motor type auto drain
Drain
Thermostatic expansion valve
Refrigerating Compressor
Ball valve