公开(公告)号：US20190040874A1

公开(公告)日：2019-02-07

申请号：US16157536

申请日：2018-10-11

申请人： Johnson Electric International AG

发明人： Chuan Jiang GUO ,  Chuan Hui FANG ,  Feng XUE ,  Feng LIU ,  Ji Cheng PAN ,  Gang PAN ,  Yong Qiang SONG

IPC分类号： F04D29/44 ,  F04D29/58 ,  F04D25/06 ,  F04D17/16 ,  F04D29/28

摘要： A centrifugal blower includes an electric motor, a centrifugal impeller driven by the motor, a diffuser mounted to the motor and disposed between the motor and the centrifugal impeller, and a casing mounted to the diffuser. The centrifugal impeller is received in a chamber defined by the diffuser and the casing. the casing defines an opening facing the inlet of the centrifugal impeller. The diffuser has a plurality of passage walls, and a plurality of diffusing passages, each bounded by neighboring passage walls. The diffuser further has at least one mounting portion connected to one of the passage walls. A cross section of each of the diffusing passages is increased form an outer end to an inner end thereof and no throat is formed in each of the diffusing passages.