Function
FunctionDuring the period the truly round rotor turns through halt a rotation
(180 degrees), a cycle of the suction, compression and discharge strokes is completed. Each time the rotor turns through a rotation (360 degrees), the vanes complete two cycles each, or 10 cycles in total.
1. SUCTION
The refrigerant gas, that leaves the evaporator as the compressor turns, enters the low pressure chamber of the compressor, and is drawn in from the suction port as the vanes turn.
2. COMPRESSION
When suction is completed, the refrigerant gas in the cylinder chamber enclosed by the vanes is compressed as the vanes rotate. In this case, air tightness between the vane ends and cylinder inside surface is maintained by a lubricant.
3. DISCHARGE
When continuous compression causes the pressure in the cylinder chamber to rise to the extent that the pressure exceeds the pressure in the high pressure chamber, the refrigerant gas is discharged. Even when the pressure in the cylinder chamber is lower than that in the high pressure chamber, the cylinder gas never flows back to the cylinder chamber, as the discharge valve is pressed into the closed position by the pressure in the high pressure chamber.
The compressor repeated the above-mentioned cycle. Each time the rotor turns through a rotation, the five chambers partitioned by the vanes in the cylinder go through the suction, compression and discharge strokes twice each.