Bidirectional axial fan device
US-2016312792-A1 · Oct 27, 2016 · US
Blast fan
US10837345B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10837345-B2 |
| Application number | US-201715716040-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 26, 2017 |
| Priority date | Sep 29, 2016 |
| Publication date | Nov 17, 2020 |
| Grant date | Nov 17, 2020 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A blast fan includes: a tubular frame having a first opening and a second opening to pass airflow through between the first opening and the second opening. The first opening has a first reverse tapered portion expanding from inside to outside of the frame, and the first reverse tapered portion has a surface having first convex portions projecting to the inside of the frame.
First claim
Opening claim text (preview).
What is claimed is: 1. A blast fan comprising: a blade configured to rotate integrally with a motor; a tubular frame having a first opening and a second opening to pass airflow through between the first opening and the second opening, the first opening being a discharge port during a normal rotation of the blade in which the airflow passes through the tubular frame from the second opening to the first opening and a suction port during a reverse rotation of the blade in which the airflow passes through the tubular frame from the first opening to the second opening, the second opening being a suction port during the normal rotation of the blade and a discharge port during the reverse rotation of the blade; and a base member for installing the motor located at a position close to the first opening with respect to the second opening, the position being in a space inside the tubular frame, both the base member and the motor being fixed to the tubular frame, wherein: the first opening has a first reverse tapered portion expanding from inside to outside of the tubular frame, the first reverse tapered portion has a surface having first convex portions projecting to the inside of the tubular frame, a maximum diameter of the first reverse tapered portion is at an outermost end of the first opening in a direction of the airflow during the normal rotation, the second opening has a second reverse tapered portion expanding from inside to outside of the tubular frame, the second reverse tapered portion has a surface having second convex portions projecting to the inside of the tubular frame, and there are fewer second convex portions than first convex portions. 2. The blast fan according to claim 1 , wherein the first reverse tapered portion is longer than the second reverse tapered portion. 3. The blast fan according to claim 1 , wherein the first convex portions are spaced in an axial direction of the tubular frame, and the first convex portions are provided to a whole circumference of the tubular frame. 4. The blast fan according to claim 1 , wherein the second convex portions are spaced in an axial direction of the tubular frame, and the second convex portions are provided to a whole circumference of the tubular frame. 5. The blast fan according to claim 1 , wherein the first convex portions are spaced in an axial direction of the tubular frame, and the first convex portions are provided to a whole circumference of the first opening, and the second convex portions are spaced in the axial direction, and the second convex portions are provided to a whole circumference of the second opening.
Assignees
Inventors
Classifications
- F04D19/005Primary
reversible fans · CPC title
tapered · CPC title
- F04D29/547Primary
having a special shape in order to influence fluid flow · CPC title
convex · CPC title
by influencing the flow pattern, e.g. suppression of turbulence · CPC title
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Frequently asked questions
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- What does patent US10837345B2 cover?
- A blast fan includes: a tubular frame having a first opening and a second opening to pass airflow through between the first opening and the second opening. The first opening has a first reverse tapered portion expanding from inside to outside of the frame, and the first reverse tapered portion has a surface having first convex portions projecting to the inside of the frame.
- Who is the assignee on this patent?
- Sanyo Electric Co
- What technology area does this patent fall under?
- Primary CPC classification F04D19/005. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Nov 17 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).