| 摘要 |
<p>A multi-vane centrifugal blower in which a circulation flow at the axial ends of an impeller is suppressed. The blower has a scroll-type fan casing (1) with a bell mouth (4) as the air suction opening and also has the impeller of a multi-vane centrifugal type, the impeller being provided in the fan casing (1), having annularly arranged vanes (6), and blowing air, sucked from a suction opening (7) formed facing the bell mouth (4), in the centrifugal direction from between the vanes (6). Tubular bodies (11) are extended integral with holding rings (10) provided at the outer ends on the outer periphery of the impeller (2), and this suppresses a circulation flow running to the suction side at the ends of the impeller (2).</p> |
