Patent ID: 7409985

Claim:
An air conditioning system for a motor vehicle, comprising: an air distributor device ( 1 ) including: a structure ( 2 ) defining a main conduit ( 3 ) and a plurality of outlet conduits ( 4 , 5 , 6 ) communicating with the main conduit ( 3 ) and to be connected to a plurality of outlets for the outflow of air into the motor vehicle passenger compartment, Coanda effect distributor means mounted in the structure ( 2 ) of the distributor device ( 1 ) and movable to a plurality of operative positions each causing deviation, by the Coanda effect, of the air flowing through the main conduit into a selected one of said outlet conduits, said Coanda effect distributor means comprising a flow perturbating member ( 16 ) having at least one active portion ( 18 ) and movable between: a first operative position, in which said active portion ( 18 ) is retracted within an opening ( 20 ) formed in a lateral wall ( 3 a ) of the main conduit ( 3 ), so that the air flowing through the main conduit ( 3 ) remains adherent to said lateral wall ( 3 a ) by the Coanda effect, thus flowing into a first outlet conduit ( 4 ) having a lateral wall arranged as an extension of said lateral wall ( 3 a ) of the main conduit, and a second operative position in which said active portion ( 18 ) protrudes inside the main conduit ( 3 ) through said opening ( 20 ) formed in said lateral wall ( 3 a ) of the main conduit ( 3 ), so that the air flow is caused to detach from said lateral wall ( 3 a ) and to be attracted, again by the Coanda effect, by an opposite wall of a second outlet conduit ( 5 ), thus flowing into said second outlet conduit ( 5 ), a heat radiating mass ( 10 ) positioned upstream of the main conduit ( 3 ) in a conduit portion connecting the main conduit ( 3 ) to an inlet conduit ( 7 ), in such a way that said radiating mass ( 10 ) is traversed by the flow of air which arrives into the main conduit ( 3 ) from the inlet conduit ( 7 ) of the distributor device ( 1 ), to heat said flow of air, means for changing the temperature of the flow of air conveyed into said main conduit, said temperature changing means comprising a by-pass conduit ( 15 ) which connects the inlet conduit ( 7 ) to the main conduit ( 3 ) in parallel to said conduit portion in which said radiating mass ( 10 ) is positioned, and a shutter ( 22 ) for throttling said by-pass conduit ( 15 ), for variably obstructing said by-pass conduit ( 15 ), said shutter ( 22 ) being operatively connected to said flow perturbating member ( 16 ) of the Coanda effect distributor means, so that different positions of the perturbating member ( 16 ), which cause deviation of the air flow into a selected one of said outlet conduits ( 4 , 5 , 6 ), correspond to different positions of the shutter ( 22 ), in such a way that the temperature of the flow of air exiting the distributor device ( 1 ) has different values depending on which outlet conduit ( 4 , 5 , 6 ) has been selected through said perturbating member of the Coanda effect distributor means.