Air distribution box

Abstract

The invention relates to an air distribution box (8) having an air inlet (103) and at least two air outlets (104). Each air outlet (104) is equipped with at least one two-vane valve unit. Inside the distribution box (8), between the air inlet (103) and the air outlets (104), there is at least one rotating guide plate (400) for distributing the fresh air entering the distribution box (8) through the air inlet (103) between the air outlets (104) by adjusting the angle of the guide plate (400), thereby reducing noise and improving the efficiency of fresh air flow.