After "220V Cooling Fan" and bring cold air blowing away the heat fins, and the heat conduction speed of the fan can be composed of a fan of thermally conductive sheet material decisions, and therefore the quality of materials for heat radiator The conductivity has a decisive role, for which we must pay attention to the choice of fan thermal conductivity "220V Cooling Fan" thermally conductive sheet is good. Copper is an excellent heat conduction properties of the metal, if the production of copper heat sink, cooling effect that would be ideal, but the copper to the more solid, larger difficulty of processing the heavier mass, and the cost is higher, so it is difficult to see copper to produce the heat sink. Copper is again in iron and aluminum, these two metals, but very popular, but the two transverse compare, you will find easy to iron rust, hard, difficult process, quality is more important weaknesses, while aluminum was not The trouble, so the production of aluminum has become "220V Cooling Fan" the best material.