Refrigeration cycle function - GF83.40-P-2001MCC

MODEL 451.3/4 with CODE (I01) Air conditioning Plus 

Fig 1: Refrigeration Cycle Function Diagram

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Function 

The refrigerant compressor driven by the engine aspirates the gaseous refrigerant from the evaporator, compresses it, and pushes it into the high-pressure circuit to the condenser as a hot gas.

The refrigerant gives off the compression heat through the surface of the condenser and liquefies in the process.

When it flows through the desiccant cartridge integrated in the condenser, the refrigerant is dehydrated and cleaned of chemical and mechanical impurities.

The expansion valve sprays the liquid refrigerant into the refrigerant line leading to the evaporator. In the process, the refrigerant pressure drops, whereby the aggregate state of the refrigerant starts to change from liquid to gaseous.

The refrigerant flows through the evaporator. While doing so, thermal energy is supplied to the refrigerant through the air blowing by the outside of the evaporator, which is needed by the refrigerant in order to be able to evaporate completely. At the same time, the air blowing by is cooled down, dried, and routed into the vehicle interior.

The condensation water developing while the air is cooling down is routed to the outside.

The refrigerant compressor aspirates the refrigerant which has turned gaseous on account of the heat absorption and then compresses it yet again.