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Solid-state fan : ウィキペディア英語版 | Solid-state fan A solid-state fan is a device used to produce an airflow with no moving parts. Such a device may use the principle of electro-aerodynamic pumping, which is based on corona discharge. It has advantages over mechanical fans such as that it is noiseless and more reliable. Electro-aerodynamic pumping is based on corona discharge which is the underlying technology in many consumer and industrial products, from silent household air purifiers and photocopiers to electrostatic precipitators and some lasers. It involves application of a voltage difference between two electrodes; a geometrically sharp electrode and a blunt electrode. This creates an intense electric field in the region near the sharp electrode and breaks down the air locally. Ions produced in this discharge are attracted to the distant blunt electrode. As they traverse the gap between the electrodes, the ions collide with neutral air molecules creating a body force and a pressure head in the air. This pressure head causes the desired air flow.〔http://www.ehomeupgrade.com/2008/03/24/cutting-edge-thorrn-micro-techologies-solid-state-cpu-cooling-fan/〕 == References ==
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