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Air Conditioning

Air Conditioning

The air conditioning system essentially consists of the refrigerant system, heating and blower unit. It complements the ventilation system in a vehicle.

The refrigerant system works as follows:
the compressor, powered by the engine, compresses the gaseous refrigerant. The refrigerant is heated up and is then guided to the condenser, where it cools down and is liquefied. An expansion valve injects the cooled liquid into the evaporator, where the refrigerant is evaporated. In the process, heat is extracted from the surrounding area.

In simple terms, before the air enters the vehicle interior it is directed through the air conditioner’s evaporator, where it loses its heat to the refrigerant. The cooled and dried air is then blown into the interior. Some systems feature an externally regulated compressor with an evaporator temperature which can be regulated between 2 and 12 °C. This ensures that the air is not dehumidified any more than is necessary, meaning that the amount of energy required, and therefore fuel consumption, is reduced.

Volkswagen offers both a semi-automatic air conditioning system and "Climatronic" automatic air conditioning for its cars.