Linear compressor

Patent metadata

Field	Value
Publication number	US-10352313-B2
Application number	US-201514644254-A
Country	US
Kind code	B2
Filing date	Mar 11, 2015
Priority date	Jun 24, 2014
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

Abstract

A linear compressor is provided that may include a shell including a suction inlet, a cylinder provided in the shell to define a compression space for a refrigerant, a piston reciprocated in an axial direction within the cylinder, a discharge valve provided at a first side of the cylinder to selectively discharge the refrigerant compressed in the compression space, at least one nozzle, through which at least a portion of the refrigerant discharged through the discharge valve flows, the at least one nozzle being disposed in the cylinder, and at least one expansion portion that extends from the at least one nozzle to an inner circumferential surface of the cylinder, the at least one expansion portion having a flow cross-section area greater than a flow cross-section area of the at least one nozzle.

First claim

What is claimed is:

1. A linear compressor, comprising: a shell comprising a suction inlet; a cylinder provided in the shell to define a compression space for a refrigerant, the cylinder including a cylinder body that extends in an axial direction and has a cylindrical shape and a cylinder flange that extends from the cylinder body in a radial direction; a piston reciprocated in the axial direction within the cylinder body; a discharge cover provided at one end of the cylinder and having a discharge space for the refrigerant discharged from the compression space; a discharge valve provided at the discharge cover to selectively discharge refrigerant compressed in the compression space; a frame disposed to surround the cylinder body and the cylinder flange; a gas flow path formed between an outermost circumferential surface of the cylinder flange and an innermost circumferential surface of the frame; a gas inflow recessed in a circular shape along an outer circumferential surface of the cylinder body, the gas inflow being configured to be fluidly connected to the gas flow path; a thread filter disposed to be wound around the gas inflow and comprising a plurality of strands of a spun thread; a plurality of nozzles recessed inward from the gas inflow in the radial direction; and an expansion portion that extends from each of the plurality of nozzles towards an inner circumferential surface of the cylinder body, the expansion portion being fluidly connected with the plurality of nozzles and having an axial width greater than an axial width of each of the plurality of nozzles, wherein the gas inflow, each of the plurality of nozzles, and the expansion portion are arranged in the radial direction, wherein the frame includes: a frame body that surrounds the cylinder body; a frame flange that extends in the radial direction of the frame body and coupled to the discharge cover; and a recess recessed from the frame flange to allow the cylinder flange to be inserted therein, and wherein the gas flow path comprises a first path extending in the axial direction and a second path extending in the radial direction.

2. The linear compressor according to claim 1 , wherein the expansion portion is recessed outward from the inner circumferential surface of the cylinder body.

3. The linear compressor according to claim 1 , wherein the expansion portion comprises:
a first extension portion that extends from each of the plurality of nozzles in the axial direction; and
a second extension portion that extends from the first extension portion in a direction that crosses an outer circumferential surface of the piston.

4. The linear compressor according to claim 3 , wherein the second extension portion extends in a direction perpendicular to the first extension portion.

5. The linear compressor according to claim 1 , wherein a height of the expansion portion in the radial direction is equal to or greater than a height of a space between the cylinder and the piston in the radial direction.

6. The linear compressor according to claim 1 , wherein the expansion portion has a cross-sectional area greater than a cross-sectional area of each of the plurality of nozzles.

7. The linear compressor according to claim 1 , wherein the gas inflow has an axial width greater than an axial width of each of the plurality of nozzles.

8. The linear compressor according to claim 1 , wherein the expansion portion has an axial width greater than an axial width of the gas inflow.

9. The linear compressor according to claim 1 , wherein the cylinder further includes a radial flange arranged to protrude from the cylinder flange.

10. The linear compressor according to claim 9 , wherein the frame further includes a coupling hole formed at the recess, the coupling hole being coupled with the radial flange.

Assignees

• Lg Electronics Inc

Inventors

• Ha Seongho
• Kim Donghan
• Ahn Kwangwoon

Classifications

• F04B35/045 Primary

  using solenoids · CPC title

• F04B53/008

  Spacing or clearance between cylinder and piston · CPC title

• F04B39/122 Primary

  Cylinder block · CPC title

• F04B53/20

  Filtering · CPC title

• F04B53/162

  Adaptations of cylinders · CPC title