Linear compressor

Patent metadata

Field	Value
Publication number	US-9989051-B2
Application number	US-201514804640-A
Country	US
Kind code	B2
Filing date	Jul 21, 2015
Priority date	Jul 21, 2014
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

A linear compressor is provided that may include a shell in which a discharge port may be provided, a cylinder disposed in the shell to define a compression space for a refrigerant, a piston disposed to be reciprocated in an axial direction within the cylinder, a discharge valve disposed on or at one side of the cylinder to selectively discharge the refrigerant compressed in the compression space, a valve spring coupled to the discharge valve to provide a restoring force, and a stopper coupled to the valve spring to restrict deformation of the valve spring. The stopper may include a guide recessed in a direction in which the valve spring is deformed to reduce an impulse between the stopper and the valve spring.

First claim

What is claimed is:

1. A linear compressor, comprising:
a shell in which a discharge port is provided;
a cylinder disposed in the shell to define a compression space for a refrigerant;
a piston disposed to be reciprocated in an axial direction within the cylinder;
a discharge valve disposed at one side of the cylinder to selectively discharge the refrigerant compressed in the compression space, the discharge valve including an insertion protrusion;
a plate spring coupled to the discharge valve to provide a restoring force, the plate spring including a spring body having a plurality of cutoffs and an insertion hole defined in the spring body to be coupled with the insertion protrusion; and
a stopper coupled to the plate spring to restrict deformation of the plate spring, wherein the stopper comprises;
a stopper body having a contact surface that supports the plate spring when the plate spring is deformed;
a spring support that protrudes from a periphery of the stopper body to allow the stopper body to be spaced apart from the plate spring; and
a valve avoidance groove defined in a central portion of the stopper body when the discharge valve is in its open position such that the stopper does not interfere with the insertion protrusion, wherein the contact surface extends between the spring support and the valve avoidance groove, and comprises a rounded surface or a slanted surface that extends at an incline with respect to a radial direction substantially perpendicular to the axial direction.

2. The linear compressor according to claim 1 , wherein the spring support protrudes from the stopper body toward the plate spring with respect to the contact surface, and wherein the plate spring is seated on the spring support.

3. The linear compressor according to claim 2 , wherein the stopper further comprises a guide protrusion that protrudes from the spring support toward the plate spring and is coupled to a spring recess of the plate spring.

4. The linear compressor according to claim 1 , further comprising:
a frame that fixes the cylinder to the shell;
a discharge cover coupled to the frame, wherein the discharge cover has at least one resonance chamber to reduce pulsation of the refrigerant discharged through the discharge valve; and
a spacer disposed on the discharge cover to support the stopper.

5. The linear compressor according to claim 4 , wherein the at least one resonance chamber comprises a plurality of resonance chambers, wherein the discharge cover further comprises a seat that partitions the plurality of resonance chambers and supports the spacer, and wherein each of the plurality of resonance chambers is recessed from the seat.

6. The linear compressor according to claim 1 , wherein a recessed shape of the contact surface corresponds to a deformed shape of the plat spring when the discharge valve is opened.

7. The linear compressor according to claim 1 , further comprising:
a frame that fixes the cylinder to the shell;
a discharge cover coupled to the frame, wherein the discharge cover has at least one resonance chamber to reduce pulsation of the refrigerant discharged through the discharge valve;
a first spacer disposed between the plate spring and the stopper to space the plate spring from the stopper; and
a second spacer disposed on the cover body to support the stopper.

8. The linear compressor according to claim 7 , wherein the contact surface extends from an inner circumferential surface of the first spacer toward a central portion of the stopper.

9. The linear compressor according to claim 1 , wherein the cylinder comprises at least one nozzle to introduce the refrigerant discharged through the discharge valve to an inside of the cylinder and in which a filter member is disposed.

Assignees

• Lg Electronics Inc

Inventors

• Noh Kiwon
• Lee Kyungmin
• Kim Jeehyun

Classifications

• F04B39/121

  Casings · CPC title

• F04B39/08

  Actuation of distribution members · CPC title

• F04B53/1032

  Spring-actuated disc valves (F04B53/1022, F04B53/103 take precedence) · CPC title

• F04B39/1033

  annular disc valves · CPC title

• Y10T137/7922

  Spring biased · CPC title