Blower

Patent metadata

Field	Value
Publication number	US-10844872-B2
Application number	US-201816176878-A
Country	US
Kind code	B2
Filing date	Oct 31, 2018
Priority date	Nov 22, 2017
Publication date	Nov 24, 2020
Grant date	Nov 24, 2020

Abstract

There is provided a blower capable of maintaining output performance and adjusting a thrust acting in an axial direction of an impeller while reducing the number of parts. A flow path is formed in an intake port provided in a central part in the axial direction of the first housing and a blowing passage connecting the intake port and the discharge port as top surface portions of a housing-side shroud connecting to the intake port and an impeller-side shroud formed in the impeller which face the blowing passage are adjacent to each other in the radial direction.

First claim

What is claimed is:

1. A blower in which an impeller with blades and a rotor are respectively assembled to a rotor shaft rotatably supported inside a case body having a first housing that houses the impeller and a second housing that houses a motor, and outside air is sucked from an axial direction into the case body by rotation of the impeller and discharged from a discharge port provided on an outer side in a radial direction,
wherein a flow path is formed in an intake port provided in a central part in the axial direction of the first housing and a blowing passage connecting the intake port and the discharge port as a housing-side shroud connecting to the intake port and an impeller-side shroud formed in the impeller are adjacent to each other in the radial direction and
wherein an edge portion on an outer peripheral side of the impeller-side shroud in the radial direction is protruded in the flow path, which is formed above front end portions of the blades a bottom portion of the second housing, and disposed to face the bottom portion of the second housing by forming a clearance including an axial height of front end portions of the blades.

2. The blower according to claim 1 ,
wherein the impeller-side shroud is integrally molded in a ring shape so as to connect end portions on an outer peripheral side of blades formed to stand on a disc-shaped main plate, which is arranged to face the second housing.

3. The blower according to claim 2 ,
wherein an upper surface of the main plate is arranged to be adjacent to a bottom surface of the second housing in the radial direction.

4. The blower according to claim 2 ,
wherein an outer end portion in the radial direction of the impeller-side shroud is formed to protrude by a predetermined amount from an outer peripheral end portion of the main plate to the outer side in the radial direction.

5. The blower according to claim 1 ,
wherein top surface portions of the housing-side shroud and the impeller-side shroud which face the flow path are formed to be a continuous surface.

6. The blower according to claim 1 ,
wherein a top surface portion of the housing-side shroud is arranged at a position lower than an opposite surface portion of a top surface portion of the impeller-side shroud.

7. The blower according to claim 1 ,
wherein a thrust force acting on the impeller is adjusted by a dividing position in the radial direction where the housing-side shroud and the impeller-side shroud are adjacent to each other.

Assignees

• Shinano Kenshi Co

Inventors

• Godo Shin-Ichiro
• Umematsu Akishige

Classifications

• F04D29/281 Primary

  for fans or blowers · CPC title

• F04D29/4206

  especially adapted for elastic fluid pumps · CPC title

• F04D29/441

  especially adapted for elastic fluid pumps · CPC title

• F04D17/10

  for compressing or evacuating · CPC title

• F04D29/4213 Primary

  suction ports · CPC title