| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a dust collection filter for an electric fan capable of more quickly purifying the indoor air than in a conventional case.SOLUTION: A dust collection filter for an electric fan comprise: a cylindrical side filter part with a circular cross section which has an installation port to be installed to a safe guard of a household electric fan at an end on the windward side and becomes fixed length in a blowing direction; and a front filter part formed by closing an end on the leeward side of the side filter part, in which a dust collection effective area obtained by combining the side filter part and the front filter part together is set as 1800 cmor more and so as not to exceed 4000 cmwhen a blade diameter of the electric fan is 30 cm, and average wind speed of airflow to be blown out from the side filter part is set to be faster than average wind speed of airflow to be blown out from the front filter part.</p> |
