電磁致動擺盪式風量增流器運用於薄殼空間之可行性研究

Abstract

電磁控制擺盪式風量增流器是一種具有低功耗、震動噪音小、體積小等優點之風扇，適合應用於輕薄型電子商品內部電子元件之散熱。而現代消費性電子產品之空間越來越小，內部空氣流動的空間僅剩元件與外殼間之薄層，且CPU等發熱電子元件幾何形狀多為矩形，根據其幾何形狀之大小及位置皆有可能影響風扇所產生氣流之風速，且入風孔位置的不同亦可能影響之。因此本研究使用數值模擬與實驗方法探討:1.薄殼空間內於風扇前端裝置矩形障礙物，參數為扇葉尖端與障礙物間距、障礙物長度、障礙物高度，以及開側邊、後方及上方入風孔對風速之影響，2.實際運用於散熱單一物體之散熱效益。 結果顯示其運用於散熱單一物體具有一定程度之效益，能有效降低熱阻30%至40%，且可以以量測風速的方式作為散熱效益之參考。

Electromagnetic control swing blade blower has low power, low noise and vibration, small size, makes it suitable for application in consumer electronic products. However, the interior space of consumer electronic products and the interior space of air are getting smaller. CPU and other electronic components are mostly rectangular geometries. The possible impact of wind velocity of fan is depending on its size, location of geometry and the place of air inlets are also affect. In this study, Discussing by numerical simulation and experimental methods:1. Set Rectangular obstacles on the front of fan in the shell box the following parameters are: the distant between blade tip and obstacle, length and height of obstacle. wind velocity are affected by the top ,bottom and side of air inlet. 2. Applied to a single object cooling efficiency. The results show that the heat applied to a single object which has a certain degree of efficiency, which can effectively reduce the thermal resistance from 30 to 40%, and may be the reference of cooling efficiency by measure wind velocity. Keywords: Distant between blade tip and obstacle, Length of obstacle, Height of obstacle, Air inlet