Patent ID: 8439655

Claim:
A ventilation device ( 1 ) comprising: a casing ( 6 ) suitable for channeling at least one air flow ( 3 ) set up by a blower impeller ( 5 ), with said casing ( 6 ) defining; a main air channel ( 7 ) carrying a main air flow ( 3 a ), a secondary air channel ( 8 ) designed to carry a secondary air flow ( 3 b ) to a motor ( 4 ) having a shaft in order to cool said motor ( 4 ), an opening defined by an end of said casing ( 6 ) through which the impeller ( 5 ) is inserted into said casing ( 6 ), and a volute tongue ( 13 ) defined by at least a portion of a peripheral wall ( 6 a ) of said casing ( 6 ), a portion of a side wall ( 7 c ) of said main channel ( 7 ), and a periphery wall ( 8 a ) of said secondary channel ( 8 ); wherein said secondary channel ( 8 ) is located in said volute tongue ( 13 ) and having on the one hand an inlet ( 11 ) located in said portion of said wall ( 7 c ) and on the other hand an outlet ( 12 ) with an opening of said outlet ( 12 ) and said opening defined by said end of said casing ( 6 ) entirely located in a common plane that is perpendicular to said shaft of said motor ( 4 ); and wherein said secondary channel ( 8 ) has a means ( 14 ) designed to cause the secondary air flow ( 3 b ) to change direction at least twice as it travels along said secondary channel ( 8 ).