Compressor - Subaru LEGACY 2002 Quick Reference Index

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HVAC System (Heater, Ventilator and A/C)

9. Compressor

A: LHD MODEL

The compressor is a rotary type that has a rotor fitted with five radially movable vanes. The rotor

rotates together with the vanes in an elliptical cylinder. As the rotor rotates, the volume of each

closed space formed between two adjacent vanes (referred to as "cylinder chamber" in the follow-

ing description) decreases, so that the pressure of the refrigerant gas confined in the cylinder

chamber increases. In this way, the rotary compressor performs its function as a pump. The pump-

ing cycle consisting of suction, compression and discharge takes place 10 times during every ro-

tation of the rotor.

On the discharge side of the cylinder, a roll valve is provided that opens at a predetermined high

pressure. Air tightness between the rotor shaft and front head is ensured by the shaft seal. The

trigger valve incorporated in the front side block provides the function of applying back pressure

to the vanes. The compressor contains necessary quantity of compressor oil. The oil is distributed

to all the parts requiring lubrication and sealing by utilizing the discharge pressure of the refriger-

(1) Front head

(2) Side block

(3) Rear head

(4) Check valve

(5) Rear bearing

(8) Roll valve

(9) Cylinder

(10) Front bearing

(11) Shaft seal

(12) Magnet clutch

(13) Trigger valve

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