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Heatsink Design Elements
The design of the heat sink radiators can be pre-designed according to the volume, and then the local details of the heat sink can be refined, such as the thickness of the teeth, the spacing between the teeth, the height of the teeth and the size of the bottom.
(copper skiving fins heat sink radiators)
1. Volume.
2. The bottom of the heat sink is thick. The thickness of the bottom is designed to be thicker at the heat source part and thinner towards the edge part, and the heat sink absorbs enough heat from the heat source to quickly transfer it to the surrounding thin parts.
3. Tooth shape. The thickness of the air layer is 2mm, and the minimum distance between the teeth must be more than 3.5mm, so that natural convection can ensure smoothness. The larger the spacing, the smaller the relative number of teeth, and the smaller the heat dissipation area.
A. The spacing between the teeth becomes smaller, the natural convection is weakened, and the heat dissipation efficiency is relatively reduced.
B. The spacing between the teeth is increased, the number of teeth is reduced, and the heat dissipation surface area is reduced.
The angle of the extruded teeth is generally 3°, and the thickness of the root of the teeth gradually becomes thinner toward the tip of the teeth, so that the root of the teeth absorbs enough heat to quickly transfer heat to the tip of the teeth, increasing the heat dissipation efficiency, and the mold with a draft angle is also easy to extrude.
Thickness of teeth: After the shape of the teeth is determined, the trade-off between the thickness of the teeth and the height of the teeth is very important, especially if the teeth are thin and high, it will cause difficulty in heat transfer between the teeth at a distance from the tip of the teeth. The volume of the heat sink also does not increase the heat dissipation efficiency.
Thin teeth>>>>The heat transfer ability of the teeth to the tip of the teeth is weakened.
Thickness of the tooth pieces>>>> The number of tooth pieces is reduced, and the relative heat dissipation surface area is less
The height of the tooth piece>>>>the heat transfer ability of the tooth piece to the tooth tip becomes weaker, and the relative volume heat dissipation efficiency becomes weaker.
The teeth are short>>>>the heat dissipation surface area is reduced.
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