Patent ID: 8584737
Filing Date: 2013-11-19
Classification: F28D,F28F,G06F,H05K

Abstract:
1. A heat dissipation device, comprising: a substrate; a first fin unit arranged on the substrate, the first fin unit comprising a plurality of stacked first fins; a second fin unit comprising a plurality of stacked second fins; wherein the first fins are perpendicular to the second fins; a pair of heat pipes; each heat pipe comprising an evaporation section contacting the substrate, a first condensing section attaching to the first fins, and a second condensing section attaching to the second fins; wherein the first condensing section is parallel to the evaporating section, and the heat pipe further comprises a curved connecting section between the first condensing section and the evaporation section; the second condensing section is perpendicular to the evaporation section; a top end of the second condensing section is higher than the first condensing section, and the first condensing section is higher than the evaporation section; and a centrifugal fan arranged on the first fin unit, the centrifugal fan comprising an air inlet and an air outlet perpendicular to the air inlet, the air inlet facing the first fin unit, the air outlet facing the second fin unit, the centrifugal fan further comprising a base wall, a top wall, an annular wall between the base wall and the top wall, and an impeller, the base wall, the top wall and the annular wall cooperatively defining a space for receiving the impeller therein, the impeller comprising a hub, a plurality of blades surrounding the hub, an annular ring arranged around the hub and interconnecting middle portions of the blades, and a plurality of poles extending outward from the hub and connected to the annular ring.