IMPELLER AND BLOWER

摘要

An impeller is arranged to rotate about a central axis, and includes a disk-shaped portion arranged to extend radially with respect to the central axis, and a plurality of rotor blades arranged along a circumferential direction on one surface of the disk-shaped portion. Each rotor blade has one end arranged at an outer edge portion of the disk-shaped portion, and an opposite end arranged radially inward of the outer edge portion of the disk-shaped portion. The rotor blades include a plurality of first rotor blades each of which includes a first curvature portion and a plurality of second curvature portions. A center of the radius of curvature of the first curvature portion of each first rotor blade is arranged on a first side of the first rotor blade with respect to the circumferential direction. A center of the radius of curvature of each second curvature portion of each first rotor blade is arranged on a second side of the first rotor blade with respect to the circumferential direction. The first curvature portion is arranged radially inward of each second curvature portion. Regarding adjacent ones of the second curvature portions, the radius of curvature of the second curvature portion arranged radially outward is greater than the radius of curvature of the second curvature portion arranged radially inward.

主权项

1. An impeller arranged to rotate about a central axis, the impeller comprising:
a disk-shaped portion arranged to extend radially with respect to the central axis; and a plurality of rotor blades arranged along a circumferential direction on one surface of the disk-shaped portion, each rotor blade having one end arranged at an outer edge portion of the disk-shaped portion, and an opposite end arranged radially inward of the outer edge portion of the disk-shaped portion; wherein the rotor blades include a plurality of first rotor blades each of which includes a first curvature portion and a plurality of second curvature portions; a center of a radius of curvature of the first curvature portion of each first rotor blade is arranged on a first side of the first rotor blade with respect to the circumferential direction; a center of a radius of curvature of each second curvature portion of each first rotor blade is arranged on a second side of the first rotor blade with respect to the circumferential direction; the first curvature portion is arranged radially inward of each second curvature portion; and regarding adjacent ones of the second curvature portions of each first rotor blade, the radius of curvature of the second curvature portion arranged radially outward is greater than the radius of curvature of the second curvature portion arranged radially inward.