Patent ID: 7277281

Claim:
A heat dissipation device for use in a computer enclosure, the computer enclosure having a group of wires therein, the heat dissipation device, comprising: a heat sink assembly comprising a main heat sink, an auxiliary heat sink and a heat pipe thermally connecting the main and auxiliary heat sinks, the main heat sink comprising a heat spreader and a plurality of first fins upwardly disposed on the heat spreader, the auxiliary heat sink comprising a plate mounted onto a top of the first fins and a plurality of second fins upwardly disposed on the plate, the heat pipe comprising an evaporating portion sandwiched between the heat spreader and the first fins, a condensing portion sandwiched between the plate and the top of the first fins, wherein the plate is parallel to the heat spreader; a fan mounted on a front side of the heat sink assembly, a top of the fan positioned above a top of the heat sink assembly; and a wire fixture configured for fixing the wires thereto, the wire fixture comprising a mounting plate positioned on the top of the heat sink assembly, a faceplate parallel to the mounting plate and in alignment with the top of the fan, and a baffle plate obliquely interconnecting the mounting plate and the faceplate, the mounting plate having a bridge protruding therefrom to form a receiving room below the bridge, the bridge helping the wire fixture to fix the wires thereto, a pair of tabs extending perpendicularly and downwardly from two opposite front ends of the faceplate and engaging with corresponding portions of the fan, a pair of lateral walls parallel to the first and second fins and extending perpendicularly and downwardly from two opposite lateral ends of the mounting plate to engage with two opposite outmost second fins of the auxiliary heat sink; wherein the wire fixture is so configured as to block one portion of the airflow generated by the fan from dissipating from the top of the heat sink assembly, thus ensuring that the airflow can adequately blow to the fins to enhance the heat dissipating performance of the heat dissipation device.