US 12,258,957 B2
Linear compressor
Sangjin Song, Seoul (KR); Junghae Kim, Seoul (KR); and Chulgi Roh, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG Electronics Inc., Seoul (KR)
Filed on Jun. 25, 2021, as Appl. No. 17/358,302.
Claims priority of application No. 10-2020-0089792 (KR), filed on Jul. 20, 2020.
Prior Publication US 2022/0018344 A1, Jan. 20, 2022
Int. Cl. F04B 53/14 (2006.01); F04B 53/16 (2006.01)
CPC F04B 53/14 (2013.01) [F04B 53/16 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A linear compressor, comprising:
a piston configured to reciprocate in an axial direction; and
a cylinder that is provided on a radially outer side of the piston to accommodate the piston and that defines a compression space with the piston,
wherein the cylinder (i) is provided with a gas pocket that is recessed from an inner circumferential surface of the cylinder and that has an elliptical outline and (ii) defines a gas hole such that a first end of the gas hole is at an outer circumferential surface of the cylinder and a second end of the gas hole is at an inner circumferential surface of the cylinder,
wherein the gas pocket comprises:
a first gas pocket provided at a first axial side of the cylinder with respect to a center of an axially extended line, and
a second gas pocket provided at a second axial side of the cylinder with respect to the center of the axially extended line,
wherein the first gas pocket and the second gas pocket are elongated in the axial direction of the cylinder, respectively, and
wherein the gas hole comprises (i) a first gas hole deviated from a center of the first gas pocket toward a front end of the cylinder and (ii) a second gas hole deviated from a center of the second gas pocket toward a rear end of the cylinder.