| 发明名称 |
AXIAL FLOW RING FAN WITH FALL OFF. |
| 摘要 |
<p>An axial flow ring fan has improved efficiency and reduced noise by making the leading edge of each blade a generally sinusoidal shape and projecting this geometry throughout the blade by imparting fall off to each blade.</p> |
| 申请公布号 |
EP0475957(B1) |
申请公布日期 |
1994.11.30 |
| 申请号 |
EP19900907027 |
申请日期 |
1990.05.18 |
| 申请人 |
SIEMENS AKTIENGESELLSCHAFT |
发明人 |
BRACKETT, STEPHEN, E. |
| 分类号 |
F04D29/38;F04D29/32;(IPC1-7):F04D29/32 |
主分类号 |
F04D29/38 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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