| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a structure of a turbo fan increasing blower capacity and reducing noise even if size is same as former turbo fans. <P>SOLUTION: In the turbo fan provided with a hub 11 on which a rotary shaft is fixed, an annular shroud 12 arranged to face the hub 11, an annular partition plate 17 dividing an air passage having an inlet 15 on an inner diameter surface of the shroud 12 and an outlet between an outer diameter of the hub 11 and an outer diameter of the shroud 12 into two, and a plurality of blades 13 arranged between the hub 11 and the shroud 17, and between the shroud 1 and the partition plate 17, ratio of inner diameter dimension of the inlet 15 side of the shroud 12 to outer diameter dimension of the hub 11 is set to 0.72-0.86. <P>COPYRIGHT: (C)2007,JPO&INPIT |
