Compressor HVAC: Description and Operation

Refrigerant System (R-134a), Components

A/C Compressor







The compressor is driven via a belt on the engine when the A/C clutch engages (A/C ON).

Low pressure refrigerant gas from the evaporator is compressed by the compressor. After compression, the refrigerant gas (now high pressure) flows to the condenser.

The variable displacement A/C compressor varies piston stroke and output depending on load requirements and suction pressure.


NOTE:
- Zexel A/C compressors were installed from start of production. During m.y. 1996, Nippondenso (Denso) type compressors are installed as a running change. These compressors are not equipped with A/C speed sensor G111.
- The compressor contains PAG type refrigerant oil that is mixable under all temperatures with refrigerant R-134a.
- A label on the compressor indicates that compressor is for R-134a systems only.