公开(公告)号：US20170089356A1

公开(公告)日：2017-03-30

申请号：US15274729

申请日：2016-09-23

Applicant: LG ELECTRONICS INC.

Inventor： Kiwook SONG ,  Jinsoo Kim ,  Dongwook Choi

IPC: F04D29/42 ,  F04D25/02 ,  F04D29/28 ,  F04D17/16

Abstract: A centrifugal fan includes: an impeller configured to suction or discharge air; a motor configured to rotate the impeller; a housing configured to accommodate the impeller and have a suction port through which air is suctioned by rotation of the impeller and a discharge port through which air is discharged by rotation of the impeller; and a cut-off portion formed on one side of the discharge port. A flow cross-sectional area of air flowing in the housing is gradually increased from the cut-off portion to the discharge port in an air flow direction, and a distance from a lower portion of the impeller to an inner peripheral surface of the housing in a rotational axis direction of the impeller is gradually increased in at least a portion from the cut-off portion to the discharge port in the air flow direction.

公开(公告)号：US10428838B2

公开(公告)日：2019-10-01

申请号：US15277714

申请日：2016-09-27

Applicant: LG ELECTRONICS INC.

Inventor： Kiwook Song ,  Jinsoo Kim ,  Dongwook Choi

IPC: F04D29/66 ,  F04D29/28 ,  F04D29/30 ,  F04D17/16 ,  F04D29/42 ,  F24F1/0022

Abstract: A centrifugal fan includes: a housing; an impeller which is mounted in the housing; a hub which is provided in the impeller and is rotated by a driving force of a motor; and a plurality of blades which radially extend at the hub. Each of the plurality of blades is formed to have a shape curved from a leading edge to a trailing edge in a rotational direction of the impeller in each of the plurality of blades. A farthest point from a plane connecting the leading edge and the trailing edge is defined as a peak portion. The peak portion is placed closer to the leading edge than the trailing edge.

公开(公告)号：US10670047B2

公开(公告)日：2020-06-02

申请号：US15274729

申请日：2016-09-23

Applicant: LG ELECTRONICS INC.

Inventor： Kiwook Song ,  Jinsoo Kim ,  Dongwook Choi

IPC: F04D29/42 ,  F04D29/28 ,  F04D17/16 ,  F04D25/02

Abstract: A centrifugal fan includes: an impeller configured to suction or discharge air; a motor configured to rotate the impeller; a housing configured to accommodate the impeller and have a suction port through which air is suctioned by rotation of the impeller and a discharge port through which air is discharged by rotation of the impeller; and a cut-off portion formed on one side of the discharge port. A flow cross-sectional area of air flowing in the housing is gradually increased from the cut-off portion to the discharge port in an air flow direction, and a distance from a lower portion of the impeller to an inner peripheral surface of the housing in a rotational axis direction of the impeller is gradually increased in at least a portion from the cut-off portion to the discharge port in the air flow direction.