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    COUNTER-ROTATING AXIAL-FLOW FAN
    71.
    发明申请
    COUNTER-ROTATING AXIAL-FLOW FAN 有权
    逆转轴流风扇

    公开(公告)号：US20090047118A1

    公开(公告)日：2009-02-19

    申请号：US12234921

    申请日：2008-09-22

    申请人： Katsumichi Ishihara ,  Honami Oosawa

    发明人： Katsumichi Ishihara ,  Honami Oosawa

    IPC分类号： F04D25/16

    CPC分类号： F04D19/007 ,  F04D19/024 ,  F04D29/626

    摘要： A first motor rotates, in one of two rotating directions, the first impeller including a plurality of front blades in a suction opening portion of a housing. The second motor rotates, in the other rotating direction opposite to the one rotating direction, the second impeller including a plurality of rear blades in a discharge opening portion of the housing. A plurality of stationary blades are arranged between the first impeller and the second impeller in the housing. When the number of the front blades is N, that of the stationary blades is M, and that of the rear blades is P, their relationship is defined as N>P>M. A length L1 of the front blades measured in an axial direction is set longer than a length L2 of the rear blades measured in the axial direction.

    摘要翻译： 第一马达在两个旋转方向中的一个中旋转，第一叶轮包括在壳体的吸入开口部分中的多个前叶片。 第二电动机在与一个旋转方向相反的另一旋转方向上旋转，第二叶轮在壳体的排出口部分中包括多个后叶片。 多个固定叶片布置在壳体中的第一叶轮和第二叶轮之间。 当前叶片的数量为N，固定叶片的数量为M，后叶片的数量为P时，它们的关系定义为N> P> M。 沿轴向测量的前刀片的长度L1被设定为比沿轴向测量的后刀片的长度L2长。

    COUNTER-ROTATING FAN
    72.
    发明申请
    COUNTER-ROTATING FAN 审中-公开
    逆风扇

    公开(公告)号：US20070264123A1

    公开(公告)日：2007-11-15

    申请号：US11746716

    申请日：2007-05-10

    申请人： Yusuke Yoshida

    发明人： Yusuke Yoshida

    IPC分类号： F03D1/02

    CPC分类号： F04D19/007 ,  F04D19/024 ,  F04D29/023 ,  F05D2300/43

    摘要： A counter-rotating fan includes first and second fans that are coaxially arranged. The first ribs of the first fan and the second ribs of the second fan are arranged on an air-outlet side and an air-inlet side of the first impeller of the first fan, respectively. The first impeller includes first blades. When seen in an axial direction from the second fan side, while the first rib side edge of each first blade is at least partly located above one first rib, the second rib side edge of that first blade is not located below any second rib but is entirely located between two second ribs. Thus, interference of air taken in by the first blades with the second ribs and interference of air sent out by the first blades with the first ribs cannot occur simultaneously, resulting in improvement of the sound characteristics of the counter-rotating fan.

    摘要翻译： 反转风扇包括同轴布置的第一和第二风扇。 第一风扇的第一肋和第二风扇的第二肋分别布置在第一风扇的第一叶轮的出气侧和空气入口侧。 第一叶轮包括第一叶片。 当从第二风扇侧沿轴向方向看时，当每个第一叶片的第一肋侧边缘至少部分地位于一个第一肋上方时，该第一叶片的第二肋侧边缘不位于任何第二肋下方， 完全位于两个第二肋之间。 因此，由第一叶片吸入的空气与第二肋的干扰和由第一叶片与第一肋排出的空气的干扰不能同时发生，从而改善了对向风扇的声音特性。

    COUNTER-ROTATING AXIAL-FLOW FAN
    73.
    发明申请
    COUNTER-ROTATING AXIAL-FLOW FAN 有权
    逆转轴流风扇

    公开(公告)号：US20070059155A1

    公开(公告)日：2007-03-15

    申请号：US11531510

    申请日：2006-09-13

    申请人： Katsumichi Ishihara ,  Honami Oosawa

    发明人： Katsumichi Ishihara ,  Honami Oosawa

    IPC分类号： F04D25/16

    CPC分类号： F04D19/007 ,  F04D19/024 ,  F04D29/626

    摘要： A first motor 25 rotates, in one of two rotating directions, the first impeller 7 including a plurality of front blades 28 in a suction opening portion 15 of a housing 59. The second motor 49 rotates, in the other rotating direction opposite to the one rotating direction, the second impeller 35 including a plurality of rear blades 51 in a discharge opening portion 57 of the housing 59. A plurality of stationary blades 61 are arranged between the first impeller 7 and the second impeller 35 in the housing 59. When the number of the front blades 28 is N, that of the stationary blades 61 is M, and that of the rear blades 51 is P, their relationship is defined as N>P>M. A length L1 of the front blades 28 measured in an axial direction is set longer than a length L2 of the rear blades 51 measured in the axial direction.

    摘要翻译： 第一马达25在两个旋转方向之一上旋转，第一叶轮7在壳体59的吸入开口部分15中包括多个前叶片28。 第二马达49在与一个旋转方向相反的另一旋转方向上旋转，在壳体59的排出口部分57中包括多个后叶片51的第二叶轮35。 多个固定叶片61布置在壳体59中的第一叶轮7和第二叶轮35之间。 当前叶片28的数量为N，固定叶片61的数量为M，后叶片51的数量为P时，它们的关系被定义为N> P> M。 沿轴向测量的前叶片28的长度L 1设定为比沿轴向测量的后叶片51的长度L 2长。