Temperature control, IHKS

The ventilation temperature is regulated by the mixing flap in the heater/air conditioner. The air-mass flow is guided through the evaporator. The air-mass flow is cooled and dried (when the air conditioning system is switched on). Subsequently, the mixing flap guides the air-mass flow (depending on the set desired temperature value) fully or partially over the heat exchanger for the heating system and the electrical auxiliary heater. Subsequently, the air flows mix once again. The air-mass flow is then guided via the air distribution flap into the vehicle interior.

The evaporator temperature is regulated with the help of the evaporator temperature sensor and the expansion valve. The evaporator temperature is adjusted to the specified nominal value of 2 °C. Lower temperature are not possible due to the danger of freezing over. The evaporator control is independent of the temperature control in the vehicle interior.