Patent ID: 7959696

Claim:
Extractor hood comprising: an extraction conduit ( 2 ) with extraction mouth ( 2 A) used to extract an air flow (S 2 ) in the direction of an axis (A) in such a way to extract the fumes (S 3 ) from the cook top (P), an air treatment unit ( 4 ) designed to force air through the extraction conduit ( 2 ), at least one delivery conduit ( 3 ; 30 ) provided with at least one deflector ( 3 A; 30 A) designed to convey a forced air flow (S 1 ; S 4 ) outside in the direction of at least one axis (B; B′; B 1 , B 2 ) that forms an angle (α; α′; α 1 ; α 2 ) different from zero with respect to the axis (A) of the extracted air flow (S 2 ), in such a way to generate a pneumatic screen (S 1 , S 4 ) and a vortex (V 1 ) between the extracted air flow (S 2 ) and the pneumatic screen (S 1 , S 4 ) that favours air extraction through the mouth ( 2 A), wherein the deflectors ( 3 A, 30 A) of the same specimen of the delivery conduit ( 3 , 30 ) are directed in such a way to generate corresponding pneumatic screens with intersecting directions above the cook top (P), wherein the extraction conduit ( 2 ) is mounted in coaxial position in the delivery conduit ( 3 ), wherein a distributor ( 7 ) is mounted inside the delivery deflector ( 3 A), being provided with a plurality of blades ( 70 ) arranged according to an axis (C) inclined by an angle β different from zero, with respect to the radial axis (R) passing through the blade in order to generate a pneumatic screen (S 1 ) with helicoidal section.