Convex grid shape to reduce turbulence under rotary door
US10052934B2 · kind B2 · utility
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23References
7Claims
0Family size
Assignee
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Key dates
| Filing date | May 10, 2013 |
| Grant date | Aug 21, 2018 |
| Priority date | — |
| Expiry date | Jun 13, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60H2001/00721
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A fresh air and recirculation air switching case using a rotary door, since an introduced air flows along an inner surface of a circumferential wall of the rotary door, a convex grid is formed on an inner surface of the circumferential wall of the rotary door. In this system, the air flow directed toward a suction inlet is prevented from becoming turbulent behind the rotary door and the air flow noise can be suppressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.