Subaru 2002 Impreza Service Manual page 375

AIR CONDITIONER
HVAC System (Heater, Ventilator and
N C )
B: COMPRESSOR
The rotary type compressor consists of an integrally formed rotor and shaft, five vanes, and a cylin-
der.
As the rotor turns, the vanes that are movally fitted in the rotor slide over the wall of the oval-shaped
cylinder while drawing, compressing, and discharging refrigerant gas.
The compressor shell has at its rear end an oil separator. High-pressure refrigerant gas having
entered this chamber is separated from the oil it contains before flowing out through the compres-
sor's delivery port.
There is a check valve in the front housing to avoid reverse rotation of the compressor which would
otherwise occur when the compressor is stopped.
(1) Oil cut-off valve
(2) Oil separator chamber
(3) Shell
(4) Discharge
(5) Rear side plate
(6) Front side plate
(7) Suction
(8) Check valve
NFO170
(9) Shaft
(1 0)
Suction port
(1 1 ) Cylinder
(12) Rotor
(13) Vane
(1 4) Discharge valve
(1 5) Discharge port
AC-11