Refrigerant circuit function

P83.40-3071-76

1 Condenser

2 Fluid reservoir

3 Expansion valve

4 Evaporator

A9 Refrigerant compressor

B12 Refrigerant pressure sensor (as of 1.6.05)

B12/2 Refrigerant pressure and temperature sensor (up to 31.5.05)

Function

The refrigerant compressor is driven by the engine and compresses the refrigerant vapor which is thereby heated up, and then passes into the condenser where it is cooled.

The refrigerant's compression heat is then withdrawn on the surface of the condenser. While cooling down, the refrigerant liquefies.

When the refrigerant flows through the fluid reservoir it is cleansed of any chemical and mechanical impurities.

The liquid refrigerant passes through the expansion valve into the evaporator located in the fresh air flow. The refrigerant is then vaporized.

This evaporation process removes heat from the fresh air flowing through the system of tubes and fins from the outside, cooling it.

The air humidity carried along is converted to condensed water, which is routed to the outside. The air dries out.

The refrigerant compressor aspirates the refrigerant which has turned gaseous on account of the heat absorption and then compresses it yet again.

The pressure and refrigerant temperature sensor monitors the pressure and temperature of the refrigerant.

The refrigerant pressure sensor monitors the pressure of the refrigerant.