公开(公告)号：US20060140758A1

公开(公告)日：2006-06-29

申请号：US11313173

申请日：2005-12-20

申请人： Toshinori Ochiai ,  Masaharu Sakai ,  Shoichi Imahigashi ,  Yasushi Mitsuishi

发明人： Toshinori Ochiai ,  Masaharu Sakai ,  Shoichi Imahigashi ,  Yasushi Mitsuishi

IPC分类号： F04D29/44

CPC分类号： F04D29/282 ,  F04D29/30

摘要： Each of blades of a multi-blade centrifugal blower is provided with a taper portion, which is arranged at an inside periphery at least at the side of one rotation-shaft-direction end of the blade and tapers from the side of other rotation-shaft-direction end of the blade toward the side of the one rotation-shaft-direction end. The taper portion is positioned at a rotation-direction front side with respect to a back portion disposed at the side of the other rotation-shaft-direction end of the blade. Each of inlet angles throughout the taper portion is set in a range from 55° to 74°. Therefore, air flowing speed at an outlet of an impeller wheel is uniformed throughout the blade width. Work capacity and efficiency of the impeller wheel are increased, while noise is reduced.

摘要翻译： 多叶片离心式鼓风机的叶片中的每一个叶片均设置有锥形部，该锥形部至少在叶片的一个旋转轴方向端部的内侧配置，并且从其他旋转轴的一侧逐渐变细 叶片朝向一个旋转轴方向端侧的方向端。 锥形部分相对于设置在叶片的另一旋转轴方向端侧的后部位于旋转方向前侧。 整个锥形部分中的每个入口角度设定在55°至74°的范围内。 因此，在叶片宽度的叶轮的出口处的空气流动速度是均匀的。 增加叶轮的工作能力和效率，降低噪音。

公开(公告)号：US07281897B2

公开(公告)日：2007-10-16

申请号：US11313173

申请日：2005-12-20

申请人： Toshinori Ochiai ,  Masaharu Sakai ,  Shoichi Imahigashi ,  Yasushi Mitsuishi

发明人： Toshinori Ochiai ,  Masaharu Sakai ,  Shoichi Imahigashi ,  Yasushi Mitsuishi

IPC分类号： F04D29/30

CPC分类号： F04D29/282 ,  F04D29/30

摘要： Each of blades of a multi-blade centrifugal blower is provided with a taper portion, which is arranged at an inside periphery at least at the side of one rotation-shaft-direction end of the blade and tapers from the side of other rotation-shaft-direction end of the blade toward the side of the one rotation-shaft-direction end. The taper portion is positioned at a rotation-direction front side with respect to a back portion disposed at the side of the other rotation-shaft-direction end of the blade. Each of inlet angles throughout the taper portion is set in a range from 55° to 74°. Therefore, air flowing speed at an outlet of an impeller wheel is uniformed throughout the blade width. Work capacity and efficiency of the impeller wheel are increased, while noise is reduced.

摘要翻译： 多叶片离心式鼓风机的叶片中的每一个叶片均设置有锥形部，该锥形部至少在叶片的一个旋转轴方向端部的内侧配置，并且从其他旋转轴的一侧逐渐变细 叶片朝向一个旋转轴方向端侧的方向端。 锥形部分相对于设置在叶片的另一旋转轴方向端侧的后部位于旋转方向前侧。 整个锥形部分中的每个入口角度设定在55°至74°的范围内。 因此，在叶片宽度的叶轮的出口处的空气流动速度是均匀的。 增加叶轮的工作能力和效率，降低噪音。