Patent ID: 6941967

Claim:
An air-distribution system, comprising: at least one inlet duct for a flow of air; a plurality of mouths for outflow of the air into an environment; and an air-distributing device, comprising: an inlet ( 3 ), which receives the air-flow from the aforesaid inlet duct; and a plurality of outlets, located at a distance from said outflow mouths and connected to the latter by respective pipes, characterized in that said air-distributing device further comprises: a passage ( 6 S; 6 D) connected to said air-flow inlet duct; and means associated to said passage for deviating the air-flow in one first or one second direction ( 7 S, 7 C; 7 D) by the Coanda effect, towards respective first and second outlets, wherein said passage is constituted by a main duct ( 6 S; 6 D), which has one inlet end and comes out at the opposite end in a first secondary duct ( 7 S, 7 C) and a second secondary duct ( 7 C, 7 D), which branch off from the main duct according to two distinct directions and lead to said first and second outlets, wherein said deviating means are designed to modify the geometry of the main duct in such a way as to control the direction of the flow by the Coanda effect, and wherein said deviating means comprise: one or more control openings ( 9 ) formed in one wall ( 8 ) of the main duct, and obturator or perturber means ( 10 ) co-operating with said openings and displaceable between an inactive condition and an active condition, so as to control the deviation of the main flow towards said first and second secondary ducts ( 7 C, 7 D) by the Coanda effect, without substantially involving any variation in the air-flow rate through the main duct.