Abstract
We have developed high-performance electric fans by applying features of the wings of living creatures. This paper proposes an air purifier sirocco fan blade that mimics the wings of a dragonfly. Air quality has increasingly attracted attention in Japanese homes, and one or more air purifiers are installed in almost 40% of all houses in the country. The purpose of an air purifier is to maintain air cleanness, and it is operated overnight. There is, however, the problem of the loud noise created by the fan, which also makes overnight operation inconvenient. To solve this problem, we adopted the shape of the dragonfly wing in the sirocco fan blade of an air purifier. As a result, a maximum reduction of 2.5 dB was achieved.
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