Refrigerant Circuit, Function

The A/C compressor (1) is driven by the engine and compresses the gaseous refrigerant, which heats up during this process and then flows to the condenser (2).
The heat from compression is removed from the refrigerant by the surface of the condenser (2). As the refrigerant cools, it liquefies.
As the refrigerant flows through the receiver/drier (3), it is purified of chemical and mechanical impurities and the water contained in the refrigerant is separated and collected.
The expansion valve (4) sprays the cooled and liquid refrigerant into the evaporator (5), located in the fresh air flow. The refrigerant then evaporates. This evaporation process takes heat from the fresh air flowing around the outside of the tube and honeycomb system, thereby cooling the air.
The moisture contained in the air is condensed out and drained into the atmosphere. The air is dried. The A/C compressor (1) sucks the refrigerant which has become gaseous due to the heat it has absorbed and compresses it again.

When the engine is running and blower switched on, cooled air can flow into the passenger compartment through various outlet openings. The cooling intensity depends on the temperatures set for the passenger compartment and blower setting.