Linear compressor

Patent metadata

Field	Value
Publication number	US-12366235-B2
Application number	US-202118013495-A
Country	US
Kind code	B2
Filing date	Jun 15, 2021
Priority date	Jan 8, 2021
Publication date	Jul 22, 2025
Grant date	Jul 22, 2025

Abstract

A linear compressor includes a shell and a frame disposed in the shell, where the frame includes a body portion and a flange portion extending in a radial direction from a front of the body portion. The linear compressor further includes a cylinder coupled to an inside of the body portion, a piston disposed in the cylinder and configured to reciprocate axially, a drive unit coupled to a rear surface of the flange portion, a stator cover coupled to a rear surface of the drive unit, and a heat dissipation member coupled to the drive unit and disposed between the rear surface of the flange portion and a front surface of the stator cover.

First claim

The invention claimed is:

1. A linear compressor comprising:
a shell;
a frame disposed in the shell, the frame comprising a body portion and a flange portion that extends in a radial direction from a front of the body portion;
a cylinder coupled to an inside of the body portion;
a piston disposed in the cylinder and configured to reciprocate axially;
a drive unit coupled to a rear surface of the flange portion;
a stator cover coupled to a rear surface of the drive unit; and
a heat dissipation member coupled to the drive unit and disposed between the rear surface of the flange portion and a front surface of the stator cover,
wherein the drive unit comprises a plurality of stator cores disposed radially with respect to a central area of the cylinder,
wherein the heat dissipation member is coupled to the plurality of stator cores, and
wherein the heat dissipation member comprises:
a body part formed in a ring shape and disposed on outer surfaces of the plurality of stator cores, and
a first extension portion extended inward from the body part and disposed between the plurality of stator cores.

2. The linear compressor of claim 1 , wherein the first extension portion is formed in a shape corresponding to a space between the plurality of stator cores.

3. The linear compressor of claim 1 , wherein the heat dissipation member comprises a second extension portion that extends from an inside of the first extension portion toward the stator cover.

4. The linear compressor of claim 3 , wherein the heat dissipation member is disposed closer to the stator cover than to the flange portion.

5. The linear compressor of claim 3 , wherein a rear end of the second extension portion is disposed on the same plane as rear surfaces of the plurality of stator cores.

6. The linear compressor of claim 1 , wherein the frame comprises a protrusion extending rearward from the rear surface of the flange portion,
wherein the heat dissipation member comprises a groove extending inward from an outer circumferential surface of the body part, and
wherein the protrusion is coupled to the groove.

7. The linear compressor of claim 6 , wherein the groove overlaps the first extension portion in the radial direction.

8. A linear compressor comprising:
a shell;
a frame disposed in the shell, the frame comprising a body portion and a flange portion that extends in a radial direction from a front of the body portion;
a cylinder coupled to an inside of the body portion;
a piston disposed in the cylinder and configured to reciprocate axially;
a drive unit coupled to a rear surface of the flange portion;
a stator cover coupled to a rear surface of the drive unit; and
a heat dissipation member coupled to the drive unit and disposed between the rear surface of the flange portion and a front surface of the stator cover,
wherein the frame comprises a protrusion extending rearward from the rear surface of the flange portion,
wherein the heat dissipation member comprises a body part formed in a ring shape and a groove extending inward from an outer circumferential surface of the body part, and
wherein the protrusion is coupled to the groove.

9. The linear compressor of claim 8 , wherein the body part is axially spaced apart from the rear surface of the flange portion.

10. The linear compressor of claim 8 , wherein the outer circumferential surface of the body part overlaps axially an outer circumferential surface of the flange portion.

11. The linear compressor of claim 8 , wherein the heat dissipation member comprises a first extension portion coupled to the drive unit extending inward from an inside of the body part, and
wherein the groove overlaps the first extension portion in the radial direction.

12. A linear compressor comprising:
a shell;
a frame disposed in the shell, the frame comprising a body portion and a flange portion that extends in a radial direction from a front of the body portion;
a cylinder coupled to an inside of the body portion;
a piston disposed in the cylinder and configured to reciprocate axially;
a drive unit coupled to a rear surface of the flange portion;
a stator cover coupled to a rear surface of the drive unit; and
a heat dissipation member coupled to the drive unit and disposed between the rear surface of the flange portion and a front surface of the stator cover,
wherein the drive unit comprises a bobbin coupled to a rear surface of the frame and the front surface of the stator cover,
wherein the heat dissipation member is coupled to the frame and the bobbin,
wherein the frame comprises a protrusion extending rearward from the rear surface of the flange portion, and
wherein an inside of the heat dissipation member is coupled to a front surface of the bobbin, and an outside of the heat dissipation member is coupled to the protrusion.

13. A linear compressor comprising:
a shell;
a frame disposed in the shell, the frame comprising a body portion and a flange portion that extends in a radial direction from a front of the body portion;
a cylinder coupled to an inside of the body portion;
a piston disposed in the cylinder and configured to reciprocate axially;
a drive unit coupled to a rear surface of the flange portion;
a stator cover coupled to a rear surface of the drive unit; and
a heat dissipation member coupled to the drive unit and disposed between the rear surface of the flange portion and a front surface of the stator cover,
wherein the drive unit comprises a bobbin coupled to a rear surface of the frame and the front surface of the stator cover,
wherein the heat dissipation member is coupled to the frame and the bobbin,
wherein the heat dissipation member comprises a protrusion protruding forward from a front surface, and
wherein the protrusion is coupled to the rear surface of the flange portion.

14. A linear compressor comprising:
a shell;
a frame disposed in the shell, the frame comprising a body portion and a flange portion that extends extending in a radial direction from a front of the body portion;
a cylinder coupled to an inside of the body portion;
a piston disposed in the cylinder and configured to reciprocate axially;
a bobbin coupled to a rear surface of the flange portion, the bobbin comprising a heat dissipation part extending outward from a front surface; and
a stator cover coupled to a rear surface of the bobbin,
wherein the heat dissipation part is coupled to the flange portion.

15. The linear compressor of claim 14 , wherein the frame comprises a protrusion extending rearward from the rear surface of the flange portion, and
wherein the heat dissipation part comprises a groove formed at an outer end and coupled to the protrusion.

16. The linear compressor of claim 14 , wherein the heat dissipation part comprises a protrusion protruding forward from a front surface, and
wherein the protrusion is coupled to the rear surface of the flange portion.

Assignees

• Lg Electronics Inc

Inventors

• Noh Kiwon
• Lee Youngmun

Classifications

• F04B39/06

  Cooling; Heating; Prevention of freezing · CPC title

• H02K9/227

  Heat sinks · CPC title

• F05B2210/14

  Refrigerants with particular properties, e.g. HFC-134a · CPC title

• H02K2203/12

  Machines characterised by the bobbins for supporting the windings · CPC title

• H02K9/22

  by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges · CPC title