公开(公告)号：US09951781B2

公开(公告)日：2018-04-24

申请号：US14329469

申请日：2014-07-11

Applicant: LG ELECTRONICS INC.

Inventor： Woojoo Choi ,  Choonmyun Chung ,  Dongkyun Im ,  Taeman Yang

IPC: F04D17/10 ,  F24F7/007 ,  F24F1/00 ,  F04D25/08 ,  F04D25/12 ,  F04D29/44 ,  F04D29/42 ,  F04D17/16

CPC classification number: F04D17/10 ,  F04D17/16 ,  F04D25/08 ,  F04D25/082 ,  F04D25/088 ,  F04D25/12 ,  F04D29/4213 ,  F04D29/4226 ,  F04D29/441 ,  F24F1/0007 ,  F24F1/0022 ,  F24F7/007 ,  F24F2001/0037

Abstract: A centrifugal blower for an air conditioner may include a centrifugal fan rotatably coupled to a motor, and a bell mouth guiding air into the centrifugal fan. The centrifugal fan may include a hub fixed to the motor, a main plate provided at an outer circumferential surface of the hub, a shroud surrounding the rotary shaft, the shroud positioned opposite the main plate to define a main gas flow path, and wings arranged along a circumferential direction of the suction opening between the main plate and the shroud. A rear axial end of the bell mouth may be inserted into the shroud through the suction opening so as to form a predetermined radial gap with the suction opening. A rear portion of the bell mouth may include alternately formed protrusions and recesses inserted into the shroud.