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    • 9. 发明申请
    • Centrifugal fan
    • 离心风机
    • US20070248459A1
    • 2007-10-25
    • US11477371
    • 2006-06-30
    • Chun-Fa TsengYu-Nien HuangShun-Ta YuCheng-Yu Wang
    • Chun-Fa TsengYu-Nien HuangShun-Ta YuCheng-Yu Wang
    • F04D29/44
    • F04D29/281F04D29/30
    • A centrifugal fan includes a spiral housing, a driving mechanism and multiple internally mounted impellers. The driving mechanism and the centrifugal impeller, rotated by the driving mechanism, are installed in the spiral housing. A spiral flow channel is defined between the centrifugal impeller and the spiral housing. When the centrifugal impeller rotates, airflow is sucked axially into the spiral housing through an inlet opening and moves along each blade of the centrifugal impeller into the spiral flow channel. The centrifugal impeller includes a hub and multiple blades. Each blade is secured to the hub at one end and has at least one vertical convex strip or vertical concave strip at an opposite end, wherein the vertical convex strip or vertical concave strip on each of blade disturbs the airflow across thereof and reduces narrow-band noise.
    • 离心风扇包括螺旋壳体,驱动机构和多个内部安装的叶轮。 由驱动机构旋转的驱动机构和离心式叶轮安装在螺旋壳体中。 在离心叶轮和螺旋壳体之间限定螺旋流动通道。 当离心式叶轮旋转时,气流通过入口开口轴向吸入螺旋壳体,并沿着离心式叶轮的每个叶片进入螺旋流动通道。 离心式叶轮包括一个轮毂和多个叶片。 每个叶片在一端固定到轮毂,并且在相对端具有至少一个垂直凸条或垂直凹条,其中每个刀片上的垂直凸条或垂直凹条妨碍了横跨其间的气流并且减小了窄带 噪声。