Specifications

A/C System Components
A Scroll Compressor is a spirally wound, fixed scroll and variable scroll
that form a pair. The fixed scroll is integrated with the housing. The
r
otation of the shaft causes the variable scroll to rotate while maintaining
in the same space. Thus, the volume of the space that is created by both
scrolls varies. This changing volume creates the suction, compression and
discharge forces needed for refrigerant gas flow through the compressor.
Some hybrid models use an electrical motor drive scroll-type compressor
to continue operation even when engine stops (refer to page 3-10).
Suction:
As the capacity of the compression chamber which is created between the
variable scroll and the fixed scroll increases with the revolution of the
variable scroll, refrigerant gas is drawn in from the intake port.
Compression:
As the variable scroll revolves, the capacity of the compression chamber
gradually decreases. As a result, the refrigerant gases drawn in become
compressed and are sent to the center of the fixed scroll. The refrigerant is
completely compressed when the variable scroll completes approximately
2 revolutions.
Discharge:
After the refrigerant is compressed (refrigerant gas pressure high), the
refrigerant gas exits through the discharge port in the center of the fixed
scroll via the discharge valve.
3-9
TOYOTA Air Conditioning and Climate Control – Course 752
Note:
Operation
Scroll Compressor
Scroll-type A/C
Compressor
Oil Separator
Magnetic
Clutch
Discharge
Port
Fixed Scroll
Discharge
Port
Intake
Port
Shaft
Pins
Variable
Scroll
Fixed
Scroll
Fig. 3-10
752f310
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