Patent ID: 8356656

Claim:
A heat dissipation device, disposed in a chassis of an electronic device having a first opening, a fan disposed in the chassis of an electronic device generating a first cooling air flow, the heat dissipation device comprising: a heat dissipation element, having a first region and a second region, the first cooling air flow flowing from the first region towards the second region; an air-guiding plate, disposed in the first region, for reducing a cross-sectional area of the first cooling air flow flowing in the first region along a flow direction of the first cooling air flow, so as to draw air outside the chassis of an electronic device into the second region via the first opening to generate a second cooling air flow; and a baffle wall, disposed between the heat dissipation element and the first opening in an encircling manner, wherein the baffle wall, the chassis, and the heat dissipation element form an independent space.