Axial flow fan
AssigneeSpal Automotive S.R.L.
InventorAlessandro Spaggiari
Life of this patent
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Abstract
An axial flow fan comprises a central hub (2) and a plurality of blades (3), each fixed to the central hub (2) and extending from a respective first end (3a) proximal to the hub (2) to a respective second end (3b) distal from the hub (2); the blades (3) are inclined at a keying angle (β) to a rotation plane (R) of the fan which also comprises a plurality of aerodynamic protrusions (11), each extending from a first lateral edge (6) of a corresponding blade (3) in the vicinity of its second end (3b); each protrusion (11) lies in a plane (PP) perpendicular to an axis (A) of fan rotation.
Claims18
An axial flow fan comprising a central hub and a plurality of blades, each fixed to the central hub and extending from a respective first end proximal to the hub to a respective second end distal from the hub;
- each blade having a first lateral edge which at least partly defines a leading edge of the blade and a second lateral edge which defines a trailing edge of the blade, the blades being inclined at a keying angle with respect to a rotation direction of the blades, the fan further comprising a plurality of aerodynamic protrusions, each protrusion extending from the first lateral edge of the blade in a vicinity of the second end and lying in a plane perpendicular to an axis of fan rotation.
Dependencies are inferred from the claim text.