Patent ID: 6935835

Claim:
Centrifugal fan ( 10 ) having improved efficiency and decreased noise, comprising at least one fan housing ( 12 ), with parallel sides ( 22 , 23 ), which are fixed to opposite sides of at least one back ( 24 ), and at least one fan or impeller ( 25 ) with blades ( 27 ), positioned inside the fan housing ( 12 ), so that it does or does not overlap with the terminal of a mouth ( 26 ), characterized in that it establishes the use of, at a discharge opening ( 21 ) of the fan ( 10 ), arranged radially along the spiral of the fan housing ( 12 ) and the circumference of the mouth ( 26 ), a shaped stabilizer element ( 20 ), produced in a single piece ( 28 ) or more than one piece ( 30 ), with at least an appendage ( 30 ) facing the mouth ( 26 ), said shaped element ( 20 ) being suitable to allow separation of the flow rates and capable of determining homogenization of the flow at the outlet of the fan ( 10 ) and a decrease in vortices, responsible for high noise and loss of efficiency of the fan ( 10 ) wherein said shaped stabilizer element ( 20 ) has at least an appendage ( 30 ) fixed to said mouth ( 26 ).