US 11,808,262 B2
Linear compressor
Sangik Son, Seoul (KR); Wooju Jeon, Seoul (KR); Jaehyeok Lee, Seoul (KR); and Donghan Kim, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on May 19, 2021, as Appl. No. 17/324,219.
Claims priority of application No. 10-2020-0100576 (KR), filed on Aug. 11, 2020.
Prior Publication US 2022/0049689 A1, Feb. 17, 2022
Int. Cl. F04B 53/18 (2006.01); F04B 39/02 (2006.01); F16C 29/02 (2006.01); F04B 35/04 (2006.01)
CPC F04B 53/18 (2013.01) [F04B 39/0276 (2013.01); F04B 39/0292 (2013.01); F16C 29/025 (2013.01); F04B 35/045 (2013.01)] 1 Claim
OG exemplary drawing
 
1. A linear compressor comprising:
a cylinder that defines a compression space configured to receive refrigerant; and
a piston disposed in the cylinder and configured to reciprocate along an axial direction of the cylinder,
wherein the cylinder defines:
a plurality of supply ports that radially pass through the cylinder, the plurality of supply ports comprising a first supply port and a second supply port that are spaced apart from each other in the axial direction, and
a plurality of recesses that are defined at an inner circumferential surface of the cylinder, each of the plurality of recesses being in fluid communication with at least one of the plurality of supply ports,
wherein the plurality of recesses comprises a first recess and a second recess that are spaced apart from each other in the axial direction,
wherein the first recess comprises:
a first portion that extends in a circumferential direction of the cylinder; and
a second portion that is connected to the first portion and extends along the axial direction, and
wherein a front depth of a front area of the second portion is greater than a central depth of an axial direction center area of the second portion, the front area being disposed toward the compression space relative to the axial direction center area in the axial direction.