Linear compressor

Patent metadata

Field	Value
Publication number	US-11225958-B2
Application number	US-201916265372-A
Country	US
Kind code	B2
Filing date	Feb 1, 2019
Priority date	Feb 1, 2018
Publication date	Jan 18, 2022
Grant date	Jan 18, 2022

Abstract

A linear compressor includes a cylinder that defines a compressor space and that is configured to compress refrigerant in the compressor space, a piston located in the cylinder and configured to perform a reciprocating motion in an axial direction relative to the cylinder, a mover coupled to the piston and configured to transmit a driving force to the piston to cause the piston to perform the reciprocating motion, a stator that defines a cylinder space that receives the cylinder, in which the stator is configured to generate the driving force together with the mover, and a supporting unit that includes an overlap portion that covers at least a portion of the stator, that is coupled to the stator, and that contacts the stator.

First claim

What is claimed is:

1. A linear compressor, comprising:
a cylinder that defines a compressor space and that is configured to compress refrigerant in the compressor space;
a piston located in the cylinder and configured to perform a reciprocating motion in an axial direction relative to the cylinder;
a mover coupled to the piston and configured to transmit a driving force to the piston to cause the piston to perform the reciprocating motion;
a stator that defines a cylinder space that receives the cylinder, the stator being configured to generate the driving force together with the mover; and
a supporting unit that includes an overlap portion that covers at least a portion of the stator, that is coupled to the stator, and that contacts the stator, the supporting unit comprising frame that faces a side surface of the stator in the axial direction and that supports the stator in the axial direction,
wherein the stator comprises an inner stator and an outer stator located outside the inner stator, and
wherein the frame comprises:
a body portion that has a cylindrical shape and is coupled to the inner stator,
a flange portion that extends radially from a front end of the body portion and is coupled to the outer stator, and
at least one heat radiating portion that extends from an outer circumference of the flange portion in the axial direction and that extends along the outer circumference of the flange portion.

2. The linear compressor of claim 1 , wherein at least a part of the heat radiating portion is located radially outward relative to an outer circumference of the outer stator.

3. The linear compressor of claim 2 , wherein the stator comprises a plurality of stator cores that are stacked and that are arranged at intervals in a circumferential direction, and
wherein the at least one heat radiating portion extends along one of the intervals between the plurality of stator cores.

4. The linear compressor of claim 3 , wherein the at least one heat radiating portion has side surfaces that face the plurality of stator cores in the circumferential direction, and
wherein at least one of the side surfaces faces a side surface of the plurality of stator cores in the circumferential direction.

5. The linear compressor of claim 4 , wherein the at least one heat radiating portion defines a heat radiation hole that extends from an inner circumferential surface of the heat radiating portion to an outer circumferential surface of the heat radiating portion.

6. The linear compressor of claim 3 , wherein the at least one heat radiating portion has side surfaces that face the plurality of stator cores in the circumferential direction, and
wherein at least one of the side surfaces is spaced apart from a side surface of the plurality of stator cores in the circumferential direction.

7. The linear compressor of claim 1 , further comprising a stator cover that is located at an opposite side of the frame with respect to the stator, that is configured to support the stator in the axial direction, and that contacts the at least one heat radiating portion.

8. The linear compressor of claim 7 , wherein the at least one heat radiating portion defines a coupling hole that extends in the axial direction and that is configured to receive a coupling bolt configured to couple the frame to the stator cover.

9. The linear compressor of claim 1 , further comprising a casing that defines a hermetic inner space, the casing having an inner circumferential surface that is spaced apart from an outer circumferential surface of the stator.

10. The linear compressor of claim 1 , wherein the supporting unit comprises a housing that has an inner surface that defines a hermetic inner space, and
wherein the stator is inserted into the hermetic inner space and faces the inner surface of the housing.

11. The linear compressor of claim 1 , further comprising a stator cover that is located at an opposite side of the frame with respect to the stator, that is configured to support the outer stator in the axial direction, and that contacts the at least one heat radiating portion.

12. The linear compressor of claim 11 , wherein the stator further comprises a plurality of stator cores disposed at the outer stator and spaced apart from one another in a circumferential direction of the outer stator, and
wherein the at least one heat radiating portion extends through a space between adjacent stator cores among the plurality of stator cores.

13. The linear compressor of claim 12 , wherein side surfaces of the at least one heat radiating portion face the adjacent stator cores in the circumferential direction.

14. The linear compressor of claim 12 , wherein the plurality of stator cores have a first side in contact with the flange portion, and a second side in contact with the stator cover.

Assignees

• Lg Electronics Inc

Inventors

• Noh Kiwon
• Choi Kichul

Classifications

• H02K9/227

  Heat sinks · CPC title

• H02K9/223

  Heat bridges · CPC title

• F04B17/04

  using solenoids · CPC title

• F04B39/06 Primary

  Cooling; Heating; Prevention of freezing · CPC title

• F04B35/045

  using solenoids · CPC title