US 12,442,365 B2
Linear compressor
Jinwoong Jung, Seoul (KR); Sangeun Bae, Seoul (KR); and Chulgi Roh, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG Electronics Inc., Seoul (KR)
Filed on Jun. 1, 2023, as Appl. No. 18/204,495.
Claims priority of application No. 10-2022-0122231 (KR), filed on Sep. 27, 2022.
Prior Publication US 2024/0102459 A1, Mar. 28, 2024
Int. Cl. F04B 39/00 (2006.01); F04B 39/02 (2006.01); F04B 39/10 (2006.01)
CPC F04B 39/0027 (2013.01) [F04B 39/0276 (2013.01); F04B 39/10 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A linear compressor comprising:
a frame;
a cylinder disposed in the frame;
a piston disposed in the cylinder and configured to axially reciprocate in the cylinder;
a discharge valve disposed at a first side of the piston; and
a discharge cover assembly coupled to the frame and disposed at the first side of the piston,
wherein the discharge cover assembly comprises:
a discharge cover that defines an inner space,
a first discharge plenum that is disposed in the inner space of the discharge cover, the first discharge plenum defining a first discharge space therein, and
a second discharge plenum disposed between the first discharge plenum and the discharge cover, the second discharge plenum defining (i) a second discharge space in fluid communication with the first discharge space and (ii) a third discharge space in fluid communication with the second discharge space,
wherein the second discharge space and the third discharge space are defined between the first discharge plenum and the second discharge plenum,
wherein the first discharge plenum comprises:
a first cylindrical body that defines the first discharge space, the first discharge space being configured to receive refrigerant discharged through the discharge valve,
a first bottom portion that supports the first cylindrical body,
a first pillar that protrudes from a central part of the first cylindrical body toward the discharge valve, and
a first wall that has a ring shape protruding from the first bottom portion and surrounding the first cylindrical body,
wherein the frame defines a first bearing communication hole,
wherein the first bottom portion defines a second bearing communication portion in fluid communication with the third discharge space, and
wherein the second bearing communication portion is configured to provide a portion of the refrigerant in the third discharge space to the first bearing communication hole to thereby lubricate the cylinder and the piston.