Patent ID: 8854819
Filing Date: 2014-10-07
Classification: H01L

Abstract:
1. A cooling device, comprising: a heat sink base plate for mounting on a circuit board to absorb waste heat from a heat source at said circuit board; a radiation fin unit comprising a plurality of radiation fins mounted on said heat sink base plate opposite to said circuit board for dissipating heat; a cooling fan unit mounted on said radiation fin unit for creating currents of air toward said radiation fins; wherein said radiation fins of said radiation fin unit are arranged in parallel, defining a plurality of heat-dissipation passages between each two adjacent ones of said radiation fins, each said radiation fin comprising a plurality of first wind guiding wall portions and second wind guiding wall portions respectively tilted in reversed directions to facilitate the flow of air through said heat-dissipation passages; wherein said cooling fan unit comprises at least one fan bracket fastened to said radiation fins of said radiation fin unit, at least one fan rack respectively fastened to said at least one fan bracket, at least one fan body respectively mounted on said at least one fan rack for creating an axial flow of air toward said heat-dissipation passages, and a fan cover capped on said radiation fin unit over said cooling fan unit, said fan cover defining at least one opening corresponding to one respective fan body of said cooling fan unit.