Patent ID: 11933316
Assignee: NIDEC CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  H | IPC F  H

Claim 0:
1. A blower, comprising:
a moving blade rotatable about a central axis extending in a vertical direction;
a motor to rotate the moving blade;
a housing surrounding the moving blade and the motor; and
a substrate; wherein
the housing includes a holding portion below the moving blade to hold the motor, and a peripheral wall portion having a cylindrical shape centered on the central axis and extending upward from a radially outer end portion of the holding portion;
the peripheral wall portion includes a peripheral wall recess recessed downward from an upper end of the peripheral wall portion and connecting a space radially inside of the peripheral wall portion and a space radially outside of the peripheral wall portion;
the peripheral wall recess includes a first peripheral surface that faces one circumferential direction that is opposite to a rotation direction of the moving blade, the first peripheral surface extending in the one circumferential direction from an upper end of the peripheral wall recess toward a lower side;
the substrate is radially inside of the peripheral wall portion;
the substrate opposes the peripheral wall recess in a radial direction;
a tilt direction of the first peripheral surface is a direction perpendicular or substantially perpendicular to normal and radial directions of the first peripheral surface; and
an acute angle defined by the tilt direction of the first peripheral surface with an axial direction is greater than an acute angle defined by the moving blade with the axial direction.