发明名称 |
Ultra-thin low noise axial flow fan for office automation machines |
摘要 |
An ultra-thin low noise axial flow fan is provided for office automation machine. The center line along the blade from its root portion to its tip portion is circular arc form and it is perpendicular to the central hub. The leading edge skew angle at the tip portion of the blade is 47 degrees. The blade angle of each blade ranges from 57 to 63 degrees, which is first directly proportional to the radius of the blade and then inversely proportional to the radius of the blade from the root portion to the tip portion of the blade. The pitch-chord ratio of each blade is inversely proportional to the radius of the blade from the root port to the tip portion of the blade. The blade of the fan thereby generates high air flow and high pressure, and has advantages of low noise and ultra-thin outer casing.
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申请公布号 |
US5320493(A) |
申请公布日期 |
1994.06.14 |
申请号 |
US19920991355 |
申请日期 |
1992.12.16 |
申请人 |
INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE |
发明人 |
SHIH, MING-CHUANG;CHIEN, HUAN-JAN |
分类号 |
F04D29/38;(IPC1-7):F04D29/38 |
主分类号 |
F04D29/38 |
代理机构 |
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