Refrigerant Circuit

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 it cools the refrigerant liquefies. As it flows through the receiver/drier (3) the refrigerant is purified of all chemical and mechanical impurities.
The expansion valve (4) sprays the cool, liquid refrigerant into the evaporator (5), located in the fresh air flow. Here, the refrigerant evaporates. The evaporation process absorbs heat from the fresh air flowing by on the outside of the system of tubes and honeycombs so that they cool the fresh air.

The moisture contained in the air is condensed out and the water condensate is drained to the outside. The air is dried.
The A/C compressor (1) sucks in the refrigerant which has now become gaseous due to the heat it has absorbed and compresses it again.

When the engine is running and the blower is switched on cool air can be let into the interior via various outlets. The intensity of the refrigeration depends on the interior temperature and blower speed set previously.