Selectively controlled air conditioner outlet system of a vehicle

In a selectively controlled air conditioner outlet system for an air conditioner including a heater unit (H), said system provided with blowing outlets (Bw) for blowing out conditioned air to various portions of a cabin of a vehicle, a door (Dr) for controlling the amount of the blowing out conditioned air for each one of the blowing outlets (Bw), a vacuum source (16), and a driving device (K) coupled thereto through a vacuum selector (15), wherein by selection on the vacuum selector (15), the driving device (K) is operated in a predetermined condition and, by the driving device (K), the degree of opening of said doors (Dr) can be controlled, the improvement comprises that the driving device (K) is formed of a shift actuator (20) having a vacuum cylinder (30) and a piston (31), and the vacuum selector (15) is provided with a plurality of selecting buttons (26) (27) (28) (29) and a corresponding number of vacuum switches (22) (23) (24) (25), that said vacuum cylinder (30) is provided with a plurality of supply taps (a) (b) (c) (d) for supplying a unidirectional negative pressure signal only at one location corresponding to a position of one of a plurality of predetermined positions (A) (B) (C) (D) obtained by depressing one of the selecting buttons of the vacuum selector (15), and that the outlet system includes

• means for supplying the negative pressure signal to none of the supply taps when none of the selecting buttons is depresssed and for supplying the negative pressure signal to any one of the supply taps when a corresponding one of the selecting buttons is depressed, means for shifting the piston to a predetermined position when the negative pressure signal is supplied to any one of the supply taps, and a link mechanism connecting the piston to the doors, for moving predetermined one or more doors to a predetermined condition in response to the movement of the piston.