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Acoustic and performance improved FAN by FIN shape adjustment

IP.com Disclosure Number: IPCOM000012592D
Original Publication Date: 2003-May-19
Included in the Prior Art Database: 2003-May-19

Publishing Venue

IBM

Abstract

This technology solves thermal and acoustic problems of CPU cooling FAN. Up to this day, FINs of cooling FAN are made like a duct as indicated in Picture1. When that type of FIN works, whistle like noise appears from the FIN duct, and the noise makes FAN Acoustic characteristics poor. Therefore, FAN cooling ability is limited because of smaller FAN rotation speed. FINs of new FAN are made like an "L" character as indicated in Picture2 to open a side of the duct. As a result, FINs of this new FAN is no longer working like a whistle that of the old FAN. This shape of FINs can reduce acoustic noise, and as a result, can increase FAN rotation speed compared with the old FAN. This technology requires no increase of manufacturing difficulties, cost, weight and space for cooling system improvement. This technology has realized to increase 300rpm of FAN rotation speed, and also has realized to decrease 2.5degC of CPU temperature and 0.5degC of Basecover temperature.