| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To obtain a blower and the like for suppressing noise and increase in electric power while reducing a loss in an air flow. <P>SOLUTION: The blower includes: a propeller fan 1 having a plurality of blades that rotate around a rotating shaft to induce a gas flow; and a bell mouth 2 having a wall surface along a rotation direction of the blades of the propeller fan 1, outside an outer circumferential edge of the blades, to straighten the flow of the gas. The bell mouth 2 has a curved face formed in an air inlet 3 in such a manner that an integral of the radii of curvature on the curved face over the whole perimeter reaches the maximum within the range of conditions relating to mounting or installing the bell mouth. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
