"220V Cooling Fan" take advantage of the cooling fins to increase the area of thermal management technology is the most common and most basic way, with the electronics heat density increasing trend, the increasing demand for cooling, increasing the difficulty of cooling design high costs spent more and more. For example, early PC's CPU, such as 286, only ten watts of heat wattage, so long about 3 cm high plus low-speed fan heatsink can be solved, but now with the PC's CPU heatsink height has reached three times, threefold increase in the number of fins, "220V Cooling Fan" speed is also doubled, the cost is increased by more than 5,6 times. While the new process and design technology continues to improve, the application of the heat sink under restricted space is limited, there seems to gradually tend to limit the trend of the future a variety of techniques such as water-cooled cooling, refrigeration cycle and immersion cooling and so may be used for boiling solve the heat problem. Nevertheless, "220V Cooling Fan" fins is still the most economical and most reliable cooling method, and therefore how to improve the efficiency of the heat sink has become a very important topic.