发明名称 |
CENTRIFUGAL FAN, MOLDING DIE, AND FLUID FEEDER |
摘要 |
A centrifugal fan includes a plurality of fan blades circumferentially spaced apart from each other. The fan blade has a front edge portion to which air flows in a rear edge portion from which air flows out, and a blade surface extending between the front and rear edge portions. The blade surface includes a pressure surface on the rotation direction side of the centrifugal fan and a suction surface arranged on the back side of the pressure surface. The fan blade has a cross-sectional shape with concave portions formed at the pressure surface and the suction surface. Such a fan has an excellent blowing capacity. A molding die for use in production of the centrifugal fan, and a fluid feeder provided with the centrifugal fan are disclosed. |
申请公布号 |
US2012171026(A1) |
申请公布日期 |
2012.07.05 |
申请号 |
US201013395017 |
申请日期 |
2010.09.07 |
申请人 |
OHTSUKA MASAKI;SHIRAICHI YUKISHIGE |
发明人 |
OHTSUKA MASAKI;SHIRAICHI YUKISHIGE |
分类号 |
F04D1/00;B29C45/00 |
主分类号 |
F04D1/00 |
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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