Compressor HVAC: Description and Operation

A/C Refrigerant System, Component Overview

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:
- 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.