公开(公告)号：US11555404B2

公开(公告)日：2023-01-17

申请号：US16910856

申请日：2020-06-24

Applicant: LG Electronics Inc.

Inventor： Ki Sun Kim ,  Sangha Lee ,  Jebyoung Moon ,  Taeyoung Noh ,  Jaeyeol Lee

IPC: F01C21/08 ,  F04C18/356 ,  F04C23/00 ,  F04C18/324 ,  B22F3/10 ,  B22F3/24 ,  B22F5/00

Abstract: A rotary compressor has a combined vane-roller structure that may ensure improved productivity and reliability through control of mechanical properties. The rotary compressor includes a coupling groove which is disposed at one side of an outer circumferential surface of the roller, which has a circular arc shape from an outer diameter of the roller towards an inner diameter of the roller, and which is configured to couple a vane and the roller, and includes a ferrosoferric oxide (Fe3O4) film on a surface of the coupling groove. A manufacturing method of the rotary compressor is also described.