Patent ID: 9322409
Filing Date: 2016-04-26
CPC Classification: C05F,F04D,F24F,Y02P,Y02W

Claim Text:
1. A ventilation unit comprising: a fan equipped with a first duct or suction duct and a second duct or delivery duct and a first piping arrangement, wherein a switching assembly is provided and arranged between said fan and said first piping arrangement, said switching assembly comprising at least two switching devices movable between two positions in order to allow alternately a passage of a gas flow from said fan to said first piping arrangement and vice versa, wherein one of said two switching devices being movable between said two positions in order to selectively connect said suction duct of said fan to said first opening or said fifth opening via said second opening and wherein the other one of said two switching devices being movable between said two positions in order to selectively connect said delivery duct of said fan to said fourth opening or said fifth opening via said third opening.