| 摘要 |
PROBLEM TO BE SOLVED: To provide a vane wheel capable of realizing a high suction force.SOLUTION: A vane wheel 62 comprises a main plate having the first surface 62aa, a plurality of first vanes 62b extending from an inner circumferential surface side of the first surface 62aa toward an outer circumferential side and arranged to protrude from the first surface 62aa, and a plurality of the second vanes 62c to be extended from the inner circumferential side of the first surface 62aa toward the outer circumferential side and arranged at the inner circumferential side rather than the first vane 62b to protrude from the first surface 62aa. A length in which a radius of the first virtual circumscription circle E connecting outer end portions 62ba of a plurality of first vanes 62b is retracted by a radius of the first virtual inscription circle F connecting inner end portions 62bb of the plurality of first vanes 62b is larger than a radius of the first inscription circle F. In addition, a height of the second vane 62c in a protruding direction is smaller than a height in a protruding direction of the inner end portions 62bb of the first vanes 62b. |
