Blower

Patent metadata

Field	Value
Publication number	US-12497969-B2
Application number	US-202418421360-A
Country	US
Kind code	B2
Filing date	Jan 24, 2024
Priority date	Feb 27, 2023
Publication date	Dec 16, 2025
Grant date	Dec 16, 2025

Abstract

A blower improving heat dissipation of a bearing and achieving long operating life without increasing the number of parts is provided. A bearing holding portion rotatably supporting a motor shaft, to which a rotor of a motor and an impeller are assembled on two longitudinal sides, respectively via a bearing, is assembled to a fan casing, and part of the bearing holding portion adjacent to the impeller extends to a position facing an air path and forms part of the air path.

First claim

What is claimed is:

1 . A blower comprising an integral assembly of a fan casing accommodating an impeller and a motor casing accommodating a motor that drives the impeller to rotate, for suctioning air in an axial direction of the fan casing from a radially central portion of the fan casing and delivering the air to an annular air path provided radially outward,
wherein a rotor is assembled to one longitudinal end side of a motor shaft and the impeller is assembled to another longitudinal end side of the motor shaft, and a bearing rotatably supporting the motor shaft and a metal bearing holding portion holding the bearing are assembled, between the impeller and the motor, to the fan casing via an anti-vibration member, a tip end side of a flange portion of the bearing holding portion extending radially outward to the annular air path, which is disposed radially outward about the motor shaft, forms part of the annular air path, and a gap is provided between the flange portion of the bearing holding portion facing the annular air path and the fan casing, and wherein the anti-vibration member and the annular air path are axially between the flange portion and the motor.

2 . The blower according to claim 1 ,
wherein the flange portion is formed integrally with the bearing holding portion.

3 . The blower according to claim 1 ,
wherein the flange portion comprises an assembly of a first flange portion formed integrally with the bearing holding portion and an annular second ring-shaped flange portion superimposed on the first flange portion.

4 . The blower according to claim 1 ,
wherein the impeller comprises a plurality of first blades formed standing on one surface of a rotating plate facing an intake opening portion; and a plurality of second blades formed standing on the other surface of the rotating plate facing the flange portion.

Assignees

• Shinano Kenshi Co

Inventors

• Umematsu Akishige
• Yoshida Naomasa

Classifications

• F04D29/4226 Primary

  Fan casings · CPC title

• F04D29/281

  for fans or blowers · CPC title

• F04D29/059

  Roller bearings · CPC title

• F04D13/0633 Primary

  Details of the bearings · CPC title

• F04D29/668

  damping or preventing mechanical vibrations · CPC title