Compressor HVAC: Description and Operation

Compressor:

INSTALLED IN THE REFRIGERANT CIRCUIT
Between the lines from the suction accumulator/drier to the condenser.

FUNCTION
The compressor has the following functions:
^ Raising the temperature and pressure of the refrigerant gas.
^ Pumping refrigerant gas.

OPERATION
The compressor draws in cool refrigerant gas from the suction accumulator/drier through the suction connection.

The compressor compresses the refrigerant gas ideally from approximately 200-2250 kPa (29-326 psi) and at the same time warms it from 0°-110°C (32°-230°F). This temperature and pressure data is based on an "ideal system". When the vehicle is running the suction pressure is between 120-300 kPa (17.5-43.5 psi) and under normal conditions the high pressure reaches approximately 1400-2000 kPa (203-290 psi), but can reach 2800 kPa (406 psi) in extreme cases. At the same time, the temperature of the refrigerant gas can rise to 125°C (257°F). The hot gas is pumped under high pressure to the condenser through the pressure connection. The compressor is only able to compress gaseous material, any liquid sucked in would damage the compressor.