Patent ID: 8169781

Claim:
A power supply, comprising: a casing, having a top cover; a printed circuit board, disposed in the casing and having a heat-generating element; a heat dissipation module, disposed inside the casing, the heat dissipation module comprising: a heatsink, directly disposed at the printed circuit board and a standing part of the heatsink directly contacting the heat-generating element, wherein a top of the heatsink has a surface facing the top cover; a heat dissipation planar-plate, disposed between the surface of the top of the heatsink and the top cover; a heat-conducting planar-pad, directly disposed on the surface of the top of the heatsink and directly contacting the heat dissipation planar-plate, wherein the heat-conducting planar-pad is used for transferring thermal energy from the heatsink to the heat dissipation planar-plate; and a plurality of fixing pillars fixed between the heat dissipation planar-plate and the casing, wherein the heat dissipation planar-plate has a plurality of through holes, the through holes are used for enhancing air convection inside the power supply, so as to further increase heat dissipation efficiency, wherein there is a first interval between the heat dissipation planar-plate and the printed circuit board, there is a second interval between the top cover and the printed circuit board, and the second interval is greater than the first interval, wherein the heat conducting planar-pad is made of heat-conducting but insulated material.