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10 TRG-TRC004-EN
notes
period one
Compressor Types
In this example scroll compressor, refrigerant vapor enters through the suction
opening. The refrigerant then passes through a gap in the motor, cooling the
motor, before entering the compressor housing. The refrigerant vapor is drawn
into the scroll assembly where it is compressed, discharged into the dome, and
finally discharged out of the compressor through the discharge opening.
In the air-conditioning industry, scroll compressors are widely used in heat
pumps, rooftop units, split systems, self-contained units, and even small water
chillers.
Helical-Rotary (Screw) Compressor
Similar to the scroll compressor, the helical-rotary compressor traps the
refrigerant vapor and compresses it by gradually shrinking the volume of the
refrigerant. This particular helical-rotary compressor design uses two mating
screw-like rotors to perform the compression process.
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Figure 15