Temperature control unit for a motor vehicle

DETAILED DESCRIPTION Referring to the figure, a control unit 11 is shown having a temperature setting device 13 and an air distribution setting device 15, each in the form of a sliding setter arranged in the operator control panel of a motor vehicle (e.
g.
in the dashboard).
In addition, the operator control panel contains an air volume setting device 17 in the form of a rotary setter with a sector for fresh air operation and a sector for circulating air operation.
The temperature setting device 13 supplies a value specified by the operator as the desired inside temperature of the motor vehicle to a regulating control unit 19 as a nominal value.
An internal sensor 21 supplies the current inside temperature and an external sensor 23 supplies the outside temperature to the regulating control 19 unit as actual values.
The regulating control unit 19 can be of the type disclosed in U.
S.
Pat.
No.
4,478,274, the disclosure of which is hereby incorporated by reference.
An actuator 25 for an air mix flap, which mixes warm air and cold air in a predetermined way, and a water valve 27 in a heat exchanger of the temperature control unit are actuated based on the values calculated by the regulating control unit 19 and based on the input of the nominal inside temperature and the actual inside and outside temperature.
Optimum values for the air distribution and air volume calculated by the regulating control unit 19 are transmitted to a chain of LED displays I-VI along the translatory selecting path of the air distribution setting device 15 and to a chain of LED displays 1-6 along the rotatory selecting path of the air volume setting device 17.
Thus, a light emitting diode lights up over the setting position that one must select in order to achieve the optimum air distribution and air volume calculated by the regulating control unit 19.
A fan 37 is actuated at the appropriate rotational speed via the air volume setting device 17 in a generally known way, according to the respective settings of the air volume setting device 17 via series resistors 35