Patent ID: 8035967

Claim:
A cooling fan assembly, comprising: a cooling fan unit having a rotating shaft and a plurality of rotating vanes combined with the rotating shaft; and a flow control unit provided in a front of a ventilation direction of the cooling fan unit to control a flow of air discharged from the cooling fan unit, wherein the flow control unit comprises a resistance reducing member to protrude toward a discharge direction of the air discharged from the cooling fan unit, and a plurality of stationary vanes formed around the resistance reducing member to control a rotational directional flow component of the air discharged from the rotating vanes such that the rotational directional flow component discharged from the rotating vanes is guided by the shape of stationary vanes and the rotational directional flow component passing through the plurality of stationary vanes is reproduced as a predetermined axial direction flow component, wherein the plurality of stationary vanes control the direction of the predetermined axial direction flow component to shift from a direction perpendicular to an axial direction of the rotating shaft to a direction parallel to the axial direction of the rotating shaft as air flows towards the discharge direction, and wherein the resistance reducing member extends beyond the plurality of stationary vanes to guide the rotational directional flow component of the air along a surface of the resistance reducing member.