| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a multiblade blower capable of reducing noise attributable to a cycle flow. <P>SOLUTION: The multiblade blower 31 includes an impeller 13 rotating around a rotary shaft A and having a plurality of blades 11 in a circumferential direction, and a casing 23 accommodating the impeller 13 and having a bellmouth 19 in one of the axial directions D1 of the rotary shaft A for the impeller 13. At least part of communication sections 25 located at a bellmouth 19 side of the clearances between the blades 11 is located outside the end of the bellmouth 19 in a radial direction. The impeller 13 has an air flow resistance part 50 plugging a part of the communication sections 25 and extending annularly along the circumferential direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
