公开(公告)号：US6077032A

公开(公告)日：2000-06-20

申请号：US118128

申请日：1998-07-16

申请人： Melvin E. Wolfe, Jr. ,  Mark E. Baer

发明人： Melvin E. Wolfe, Jr. ,  Mark E. Baer

IPC分类号： F04D25/06 ,  F04D29/66 ,  F04D5/00 ,  F01D1/02 ,  F04D23/00

CPC分类号： F04D25/06 ,  F04D29/667

摘要： A motor housing for a vacuum cleaner includes a main body, a peripheral rim, and an interconnecting base bounding portions of a working air chamber. A portion of the peripheral rim defines a sidewall having a plurality of vanes and a plurality of exhaust openings, with the vanes and the exhaust openings cooperating to exhaust air from the working air chamber in response to rotation of the impeller. Each of the vanes having an airfoil-shaped cross section, and each vane is oriented such that the airfoil of each vane is oriented oppositely relative to the airfoil of its adjacent vanes. Thus, a first set of the vanes are positioned to direct air through the exhaust openings, while a second set of vanes are positioned to direct excess air from adjacent the exhaust openings toward the chamber and back into the flow pattern. The excess air is thus smoothly remixed at a different velocity with the air moving through the working air chamber such that synchronization of the air flow is reduced, and harmonic induced noise is minimized.

摘要翻译： 用于真空吸尘器的电动机壳体包括主体，外围边缘和工作空气室的互连基部边界部分。 外围边缘的一部分限定了具有多个叶片和多个排气口的侧壁，其中叶片和排气口协作以响应于叶轮的旋转排出来自工作空气室的空气。 每个叶片具有翼型截面，并且每个叶片被定向成使得每个叶片的翼型相对于其相邻叶片的翼型相反地定向。 因此，第一组叶片被定位成引导空气通过排气开口，而第二组叶片被定位成将过量的空气从排气口附近引向腔室并返回流动模式。 因此，过量的空气以与移动通过工作空气室的空气不同的速度平滑地重新混合，使得气流的同步减少，并且谐波感应噪声被最小化。