US 12,305,659 B2
Blower
Fumiya Ishii, Kariya (JP); Shouichi Imahigashi, Kariya (JP); and Shuzo Oda, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Apr. 4, 2023, as Appl. No. 18/295,316.
Application 18/295,316 is a continuation of application No. PCT/JP2021/035043, filed on Sep. 24, 2021.
Claims priority of application No. 2020-169959 (JP), filed on Oct. 7, 2020.
Prior Publication US 2023/0243362 A1, Aug. 3, 2023
Int. Cl. F04D 29/043 (2006.01); F04D 29/26 (2006.01); F04D 29/28 (2006.01)
CPC F04D 29/043 (2013.01) [F04D 29/263 (2013.01); F04D 29/281 (2013.01); F05D 2260/37 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A blower comprising:
an electric motor;
a shaft that is configured to be rotated by a torque outputted from the electric motor;
a fan that includes:
a main plate that has an axial hole which is securely press-fitted to the shaft;
a shroud that is opposed to the main plate and has a suction inlet, which is formed at a center part of the shroud and is configured to suction air; and
a plurality of blades that are placed between the shroud and the main plate and are arranged one after another around a central axis of the fan; and
a cap that is fixed to the shaft and the main plate and is configured to limit relative rotation between the shaft and the fan, wherein:
the main plate includes:
a slope portion that is placed on an outer side of the cap and is tilted such that a distance from the central axis to the slope portion in a radially outer direction is increased from one axial side, at which the axial hole is placed, toward the electric motor; and
at least three projections that project from a part of the slope portion toward the suction inlet and are intermittently arranged one after another around the central axis, wherein in a plane perpendicular to the central axis, the at least three projections are entirely placed on a radially outer side of a virtual circle that is centered on the central axis and is in contact with a radially outermost part of the cap; and
a surface of each of the at least three projections, which faces toward the suction inlet, forms a planar surface part that is located along a common imaginary plane which is perpendicular to the central axis, wherein the planar surface part of each of the at least three projections is configured to receive a load that is directed toward the electric motor in a direction parallel to the central axis to press-fit the axial hole of the main plate to the shaft.