Linear compressor and a linear motor for a linear compressor

Patent metadata

Field	Value
Publication number	US-9841011-B2
Application number	US-201514666693-A
Country	US
Kind code	B2
Filing date	Mar 24, 2015
Priority date	Jul 21, 2014
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

Abstract

An linear compressor and a linear motor for a linear compressor is provided. The linear compressor may include a shell, in which a suction inlet may be provided, a cylinder disposed in the shell to define a compression space for a refrigerant, a frame coupled to an outer side of the cylinder, a piston reciprocated in an axial direction within the cylinder, a stator cover coupled to the frame, and a linear motor supported by the frame and the stator cover to provide power to the piston. The stator cover may include a body, and at least one frame coupling portion coupled to the frame. The at least one frame coupling portion may extend from the body toward the frame.

First claim

What is claimed is:

1. A linear compressor, comprising
a shell, in which a suction inlet is provided;
a cylinder disposed in the shell to define a compression space for a refrigerant;
a frame coupled to an outer side of the cylinder;
a piston reciprocated in an axial direction within the cylinder;
a stator cover coupled to the frame;
a back cover coupled to the stator cover;
a spring device disposed between the stator cover and the back cover, to elastically support the piston; and
a linear motor supported by the frame and the stator cover to provide power to the piston, the linear motor inducing a plurality of stator core blocks wherein the stator cover comprises:
a stator cover body;
a plurality of frame coupling portions coupled to the frame, wherein the plurality of frame coupling portions extends from the stator cover body towards the frame; and
a plurality of back cover coupling portions that extends from the stator cover body in a direction opposite to the plurality of frame coupling portions, the plurality of back cover coupling portions being coupled to the back cover, wherein the back cover comprises:
a back cover body;
a plurality of stator cover coupling portions coupled to the stator cover;
a plurality of spring supports to support the spring device; and
a plurality of slits, and wherein each of the plurality of slits is disposed between adjacent stator cover coupling portions and spring supports.

2. The linear compressor according to claim 1 , wherein the linear motor further comprises:
a bobbin around which a coil is wound, wherein the plurality of the stator core blocks is spaced apart from each other in a circumferential direction, wherein the plurality of stator core blocks surrounds the bobbin, and wherein each of the plurality of frame coupling portions is disposed between two adjacent stator core blocks of the plurality of stator core blocks.

3. The linear compressor according to claim 1 , wherein the plurality of frame coupling portions is spaced apart from each other in a circumferential direction of the stator cover body.

4. The linear compressor according to claim 2 , wherein at least two stator core blocks of the plurality of stator core blocks are disposed between two adjacent frame coupling portions of the plurality of frame coupling portions.

5. The linear compressor according to claim 1 , wherein the frame comprises a coupling hole through which a coupling member penetrates, and wherein each of the plurality of frame coupling portions comprises a coupling groove, in which the coupling member is inserted after penetrating through the coupling hole of the frame.

6. The linear compressor according to claim 1 , wherein the plurality of back cover coupling portions is spaced apart from each other in a circumferential direction of the stator cover body.

7. The linear compressor according to claim 1 , wherein each of the plurality of stator cover coupling portions comprises;
an extension that extends from the back cover body in a radial direction and is bent in the axial direction; and
a coupling flange, which is bent from an end of the extension and includes a coupling hole, through which a coupling member penetrates and wherein each of the plurality of back cover coupling portions comprises a coupling groove, in which the coupling member is inserted.

8. The linear compressor according to claim 7 , further comprising a spacer disposed between the coupling flange and the back cover coupling portion.

9. The linear compressor according to claim 8 , wherein the spacer comprises a slot, through which the coupling member passes.

10. The linear compressor according to claim 8 , wherein a plurality of guide holes is defined in each of the coupling flange and the spacer, and wherein a plurality of guide grooves, is defined in each of the plurality of back cover coupling portions.

11. The linear compressor according to claim 10 , wherein the coupling groove is disposed between the plurality of guide grooves.

12. The linear compressor according to claim 1 , wherein the plurality of stator cover coupling portions and the plurality of spring support portions are alternately disposed on the back cover.

13. The linear compressor according to claim 1 , wherein the spring device comprises a plurality of springs, and wherein each of the plurality of spring supports comprises at least one spring coupling protrusion coupled to one of the plurality of springs.

14. The linear compressor according to claim 7 , wherein each of the plurality of spring supports is spaced apart from the coupling flange in the axial direction.

15. The linear compressor according to claim 1 , wherein the stator cover further comprises a reinforcing rib that connects the stator cover body to the plurality of back cover coupling portions, and wherein the reinforcing rib extends in the axial direction along an outer edge of the stator cover body.

16. The linear compressor according to claim 1 , wherein the stator cover body includes an opening, through which the piston passes.

Assignees

• Lg Electronics Inc

Inventors

• Kim Junghae
• Kim Changkyu
• Ki Sunghyun
• Han Youngcheol
• Lee Kyeongweon

Classifications

• F04B35/04 Primary

  the means being electric · CPC title

• H02K1/185

  to outer stators · CPC title

• H02K33/16

  with polarised armatures moving in alternate directions by reversal or energisation of a single coil system · CPC title

• H02K7/08

  Structural association with bearings · CPC title

• H02K1/145

  having an annular coil, e.g. of the claw-pole type · CPC title