Centrifugal multiblade blower
AssigneeDenso Corporation
InventorsToshifumi Kamiya, Hiroaki Shiraishi
Life of this patent
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Abstract
A centrifugal multiblade blower includes: an electric motor; and an impeller blowing off air outward in a radial direction by being rotated by the electric motor. A main plate of the impeller has an uneven part on one surface adjacent to the electric motor in a thickness direction of the main plate. The one surface is in contact with air passing through inside of the electric motor. A surface shape of the uneven part is formed in manner that, among a whole surface of the uneven part, a total surface area of a surface facing inward in a radial direction of the motor is larger than an imaginary smooth surface on which the surface shape of the uneven part is defined to be a smooth surface without the uneven part.
Claims19
A centrifugal multiblade blower comprising:
- an electric motor having a motor rotation shaft that rotates at a motor axial center, a commutator that rotates with the motor rotation shaft, and a brush in contact with the commutator;
- and
- an impeller having a main plate connected with the motor rotation shaft to rotate integrally with the motor rotation shaft, and a plurality of blades connected with the main plate and arranged around the motor axial center, the impeller blowing off air outward in a radial direction by being rotated by the electric motor, wherein
- the main plate has one surface facing the electric motor in a thickness direction of the main plate,
- the one surface is in contact with air passing through inside of the electric motor,
- the one surface has an uneven part with an uneven surface shape,
- the uneven part has a plurality of protrusion parts, wherein each of the protrusion parts extends in a circumferential direction entirely around the motor axial center, and
- the uneven surface shape of the uneven part is formed in a manner that, among a whole surface of the uneven part, a total surface area of a taper surface facing inward in the radial direction and being inclined relative to the motor axial center is larger than an imaginary smooth surface, on which the surface shape of the uneven part is defined, is a smooth surface without the uneven part.
A centrifugal multiblade blower comprising:
- an electric motor having a motor rotation shaft that rotates at a motor axial center, a commutator that rotates with the motor rotation shaft, and a brush in contact with the commutator;
- and
- an impeller having a main plate connected with the motor rotation shaft to rotate integrally with the motor rotation shaft, and a plurality of blades connected with the main plate and arranged around the motor axial center, the impeller blowing off air outward in a radial direction by being rotated by the electric motor, wherein
- the main plate has one surface facing the electric motor in a thickness direction of the main plate,
- the one surface is in contact with air passing through inside of the electric motor,
- the one surface has an uneven part with an uneven surface shape,
- the uneven part has a plurality of protrusion parts, a groove is defined between the protrusion parts adjacent to each other, wherein each groove extends in a circumferential direction completely around the motor axial center, and
- the uneven surface shape of the uneven part is formed in a manner that, among a whole surface of the uneven part, a total surface area of a taper surface facing inward in the radial direction and being inclined relative to the motor axial center is larger than an imaginary smooth surface, on which the surface shape of the uneven part is defined, is a smooth surface without the uneven part.
Dependencies are inferred from the claim text.