| Operation of the air conditioning system |
| The temperature in the passenger compartment is influenced by radiant heat through the window and by the contact heat emitted by metallic parts. In order to provide agreeable temperatures for the passengers on very hot days, some of the ambient heat must be evacuated. |
| As it is a well known fact that heat spreads towards colder temperatures, an aggregate that generates lower temperatures has been fitted to the vehicle, i.e. the evaporator. Liquid refrigerant is continuously evaporated in this aggregate. The heat required for this operation is drawn from the air flowing through the evaporator. |
| The refrigerant gas together with the absorbed heat is pumped out of the evaporator by the compressor. The compressor's compression work increases the heat content and the temperature of the refrigerant. It is now considerably higher than the ambient air temperature. |
| The high-temperature refrigerant and its heat content flow to the condenser. There, because of the temperature difference between the refrigerant and the ambient air, the refrigerant releases heat into the ambient air via the condenser. The evaporated refrigerant is therefore liquified. |
| The refrigerant is also a heat conveyor. As it will be re-used, it is again pumped to the evaporator. |
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