GF83.50-P-2020SX Rear Air Conditioning System Refrigeration Circuit, Function

GF83.50-P-2020SX Rear Air Conditioning System Refrigeration Circuit, Function
- with CODE (582) Rear air conditioner


Function
The refrigerant compressor (A9) which is driven by the engine compresses the refrigerant vapor, which heats up in the process. The refrigerant is guided further through the condenser, the refrigerant dissipates compression heat via the surface of the condenser. The refrigerant liquefies during cooling. If cooling via the air stream is not sufficient, air is additionally conducted along the condenser via the engine and AC electric suction fan with integrated control (M4/7).
When the refrigerant flows through the fluid reservoir it is cleansed of any chemical and mechanical impurities.
Through the rear AC refrigerant shutoff valve (Y67), the liquid refrigerant reaches the rear air conditioning evaporator, which is located in the air flow.

The refrigerant is then vaporized. This evaporation process extracts heat from the fresh air flowing past from outside via the tube and honeycomb system, causing it to cool down. 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 temperature on the evaporator is sensed by the rear air conditioning evaporator temperature sensor (B10/11). To prevent the evaporator from icing up when the temperature at the evaporator undershoots a certain value, the rear AC refrigerant shutoff valve is switched off by the AAC [KLA] control unit (N22/1).