Trane TRG-TRC004-EN manual Mrxuqdo

period one

Compressor Types

notes

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Figure 11

The center of the scroll journal bearing and the center of the motor shaft are offset. This offset imparts an orbiting motion to the driven scroll. Rotation of the motor shaft causes the scroll to orbit—not rotate—about the shaft center.

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Figure 12

This orbiting motion causes the mated scrolls to form pockets of refrigerant vapor. As the orbiting motion continues, the relative movement between the orbiting scroll and the stationary scroll causes the pockets to move toward the discharge port at the center of the assembly, gradually decreasing the refrigerant volume and increasing the pressure.

Three revolutions of the motor shaft are required to complete the compression process.

8 TRG-TRC004-EN