公开(公告)号：US20200095989A1

公开(公告)日：2020-03-26

申请号：US16578021

申请日：2019-09-20

Applicant: LG Electronics Inc.

Inventor： Jongmok LEE ,  Kyeongho KIM

IPC: F04B53/00

Abstract: A compressor includes a casing, a motor, a cylinder block including a cylinder, and a piston. The motor include a stator and a rotor located outside the stator, a rotary shaft coupled to the rotor, and a rotor frame that accommodates the rotor and the rotary shaft and that is configured to rotate together with the rotor and transmit rotational force of the rotor to the rotary shaft. The rotary shaft includes an eccentric part configured to rotate based on the rotational force of the rotor and located at a position offset from a rotational axis of the rotary shaft. The piston is coupled to the rotary shaft and configured to reciprocate in the cylinder based on rotation of the eccentric part. The rotor frame has a mass distribution configured to compensate an unbalance force generated by movement of at least one of the piston or the eccentric part.

公开(公告)号：US20240418158A1

公开(公告)日：2024-12-19

申请号：US18702208

申请日：2022-06-29

Applicant: LG ELECTRONICS INC.

Inventor： Younghwan KIM ,  Jinkook KIM ,  Jongmok LEE

IPC: F04B39/02 ,  F04B35/04 ,  F04B39/00

Abstract: A reciprocating compressor according to an embodiment of the present disclosure includes a crankshaft including a shaft portion, an eccentric mass portion, and a pin portion, and an oil groove positioned on an outer surface of the pin portion is configured to supply an oil to a pressurized portion of a bearing immediately before entering a section in which a gas load increases. For example, the oil groove can supply the oil to the bearing in a stroke section immediately before a crank angle reaches 270°. According to the above configuration, the oil is supplied to the pressurized portion of the bearing formed by the pin portion of the crankshaft and a connecting rod immediately before entering a stroke section subjected to a high load. Accordingly, lubrication by the oil can be smoothly performed in the stroke section subjected to the high load, and oil shortage can be improved even if the oil groove adopts a structure in which the bearing is open at the top and bottom.