Anti-noise and anti-vortex flow sharing device

Details Anti-noise and anti-vortex flow sharing device Anti-noise and anti-vortex flow sharing device

F - Mech Eng,Light,Heat,Weapons

04

D

F04D 29/66 (2006.01) F04D 29/42 (2006.01)

Patent

CA 2400285

A centrifugal fan (10) with improved efficiency and decreased noise, comprising a fan housing (12), in the form of a fan housing, with parallel sides (22, 23), which are fixed to opposite edges of a casing scroll (24), and a fan or impeller (25) with blades (27), positioned inside the fan housing (12), in such a way that it does or does not overlap the end of a inlet cone (26); a flow device element (20), shaped and produced in a single piece (20) or in more than one piece (28, 30), with at least one appendage facing the inlet cone (26), and if necessary overlapping the impeller (25) and extending for the width of the discharge opening (21), in such a way to allow homogenization of the flow delivered and reduction of vortices, which cause high noise and loss of efficiency of the centrifugal fan (10).

Ventilateur centrifuge (10) efficace et silencieux comprenant un boîtier de ventilateur (12) doté de côtés parallèles (22, 23) fixés aux bords opposés d'une surface de boîtier en volute (24) et un ventilateur, ou une hélice (25), doté d'pales (27) et placé à l'intérieur du boîtier (12) de façon à chevaucher ou non l'extrémité d'un cône d'entrée d'air (26). Le ventilateur centrifuge comprend aussi un dispositif d'écoulement d'air (20), formé et fabriqué en une seule pièce (20) ou comprenant plusieurs pièces (28, 30) ainsi qu'au moins un appendice faisant face au cône d'entrée d'air (26) et, s'il y a lieu, chevauchant l'hélice (25) et se prolongeant sur la largeur de l'orifice de sortie (21), de façon à uniformiser l'écoulement produit et à réduire les tourbillons qui sont à l'origine du bruit et qui réduisent le rendement du ventilateur centrifuge (10).

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