| 摘要 |
<p>A natural convection-type heatsink (30) for a cooling apparatus for cooling a heating element is suitable for an LED lighting device and has increased cooling capacity. The heatsink (30) comprises a metal plate (31) in the form of a band rolled around a central axis (CL) to have the shape of a scroll and having a base edge, wherein the height of the scroll from the base edge gradually increases towards the central axis (CL). A plurality of air intake openings (32) pass through the metal plate (31) and are in a lower portion of the metal plate (31) in the vicinity of the base edge. The cooling apparatus comprises the heatsink (30), a heating element and a printed circuit board. The heatsink (30) is mounted on an upper surface of the printed circuit board and the heating element is mounted on an undersurface thereof, wherein the heating element is located in a central position with reference to the central axis (CL) and opposite the heatsink (30).</p> |
