Patent ID: 6927979

Claim:
A heat-emitting element cooling apparatus comprising: a heat sink including a base with a heat-emitting element to be cooled mounted on a rear surface thereof and a plurality of radiation fins provided at said base; and a fan unit arranged on said heat sink, for blowing air along at least said radiation fins to promote heat dissipation from said radiation fins; wherein said heat sink is so constructed that all or part of said radiation fins are located outside a contour of said base as seen from a side where said fan unit is arranged; and said fan unit comprises: a motor; an impeller having a plurality of blades, for being driven for rotation by said motor; a fan casing having a cylindrical portion for rotatably receiving said impeller; and a plurality of webs arranged between said fan casing and said motor, for supporting said motor; said fan unit being an axial flow fan unit constructed so as to blow said air along at least said all or part of said radiation fins outside the contour of said base; said fan casing comprises an opposite wall located outside said cylindrical portion to face said heat sink, and a peripheral wall provided at said opposite wall and extending toward a side where said base is located; and said fan casing is constructed so as to define a space between said opposite wall and said heat sink, through which the air discharged from said impeller passes, and to prevent all or most of the air that has passed through said space from being directly discharged to an outside of said fan casing without passing through intervals between said radiation fins.