公开(公告)号：US11371179B2

公开(公告)日：2022-06-28

申请号：US16709196

申请日：2019-12-10

Applicant: LG Electronics Inc.

Inventor： Sanghoon Seo ,  Daejin Kim ,  Minhyeok Park ,  Jinsub Lim ,  Moonsik Choi

IPC: D06F39/08 ,  D06F25/00 ,  D06F39/12 ,  F04D13/06 ,  F04D29/66

Abstract: A drainage pump includes a housing that defines a receiving space configured to receive fluid. The housing defines a suction port configured to introduce fluid into the receiving space, and a first discharge port and a second discharge port that are configured to discharge the fluid in the receiving space to an outside of the housing. The drainage pump further includes an impeller disposed in the receiving space and configured to rotate about a rotation axis to thereby discharge the fluid in the receiving space through the first discharge port or the second discharge port; a first rib that protrudes from an inner circumferential surface of the housing toward a center of the receiving space and that is disposed between the first discharge port and the second discharge port; and a second rib that protrudes from a portion of the first rib toward the center of the receiving space.