| 摘要 |
PROBLEM TO BE SOLVED: To improve the efficiency of a motored fan and an electric vacuum cleaner, by smoothing an air flow from a blade (vane) to a return. SOLUTION: In this motored fan, a diffuser is composed of a diffuser vane body 121 which is integrally formed to an annular supporting body arranged on a fan casing side and has two or more vanes on the end bracket side of the annular supporting body, and a return guide 122 which has two or more return vanes 115d integrally formed with a partition board on the other side of the partition board with one side brought into contact with two or more vanes. The peripheral end diameter of the vane on the annular supporting body side is set larger than the peripheral end diameter of the vane on the partition board side. COPYRIGHT: (C)2007,JPO&INPIT
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