| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve such a problem that a fan motor, which keeps a filter part or a flat plate member conventionally used eliminated from requirements to make weight fall down with cost reduction and takes a constitution that the filter is integrally molded into unit casing, gets turbulent flow generated between the fan and the support bar in that case when a support bar for the unit casing supporting the filter from the center of an intake is straightly arranged, and that it serves as resistance of the air flow and causes pressure fluctuation to invite wind roar noise, unpleasant to the ear, of the fan in a high peak. <P>SOLUTION: The support bar, which shows a shape of tripartition as viewed from direction toward the air intake of a suction mouth, in the direction of moving toward the center of an outlet, is deflected in the direction toward the air flow to utilize the support bar as a rectifying member, and to dissolve the turbulent flow generated between the fan and the support bar, and therefore silencing effect for suppressing the wind roar noise, unpleasant to the ear, of the fan in the high peak can be obtained. <P>COPYRIGHT: (C)2013,JPO&INPIT |
