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TRG-TRC012-EN 23
period three
Compressor Capacity Control
notes
As the slide valve continues to open, further unloading the compressor, its
radial discharge port eventually travels past the opening in the compressor
housing. Once this occurs, all of the refrigerant vapor being pumped by the
compressor is discharged through the axial port in the compressor’s end-plate.
The compressor discharge ports and slide valve are designed to allow the
compressor to operate efficiently over a wide range of conditions.
compressor capacity control...
Unloading
radial port
radial port
compressor
compressor
discharge
discharge
to suction
to suction
slide valve
open
valve
valve
opening
opening
Figure 35