Patent ID: 7140753

Claim:
A water-cooling heat dissipation device adopted for a lighting module that includes a plurality of LEDs modulized together, the water-cooling heat dissipation device that operates as part of a system that includes a heat-conductive liquid, a liquid passing pipe, a heat exchanger and a pump, and the water-cooling heat dissipation device comprising: a heat dissipation plate; at least one curved canal recessed inside the heat dissipation plate and containing a heat-conductive liquid passing therein, the curved canal created as a part of the heat dissipation plate running laterally and including at least one bending portion arranged thereon; at least one inlet formed on one of the sides of the heat dissipation plate selectively, and the inlet communicating with the bending portion and a free end of the curved canal in an alternative manner; and at least one outlet formed on one of the sides of the heat dissipation plate selectively, and the outlet communicating with the bending portion and a free end of the curved canal in an alternative manner; wherein the lighting module contacts a top of the heat dissipation device directly; wherein the heat dissipation plate includes a plurality of interior fins projecting in the curved canal.