Linear compressor and a linear motor for a linear compressor

Patent metadata

Field	Value
Publication number	US-2016017872-A1
Application number	US-201514666693-A
Country	US
Kind code	A1
Filing date	Mar 24, 2015
Priority date	Jul 21, 2014
Publication date	Jan 21, 2016
Grant date	—

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; and a linear motor supported by the frame and the stator cover to provide power to the piston, wherein the stator cover comprises:
a body; and
at least one frame coupling portion coupled to the frame, wherein the at least one frame coupling portion extends from the body toward the frame, wherein the at least one frame coupling portion is disposed in a space between two adjacent stator core blocks of the linear motor.

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

3 . The linear compressor according to claim 2 , wherein the at least one frame coupling portion comprises a plurality of frame coupling portions spaced apart from each other in a circumferential direction of the body.

4 . The linear compressor according to claim 3 , wherein at least two stator core blocks of the plurality of 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 to which a coupling member is coupled, and wherein the at least one frame coupling portion comprises a coupling groove to which the coupling member is coupled.

6 . The linear compressor according to claim 5 , wherein the coupling member is coupled to the coupling hole and the coupling groove to face the at least one frame coupling portion at a side of the frame.

7 . The linear compressor according to claim 1 , further comprising a back cover having at least one stator cover coupling portion coupled to the stator cover, wherein the stator cover further comprises at least one back cover coupling portion that extends from the body in a direction opposite to the at least one frame coupling portion, the at least one back cover coupling portion being coupled to the back cover.

8 . The linear compressor according to claim 7 , wherein the at least one back cover coupling portion comprises a plurality of back cover coupling portions spaced apart from each other in a circumferential direction of the body.

9 . The linear compressor according to claim 7 , wherein each stator cover coupling portion comprises a coupling flange having a coupling hole, to which a coupling member is coupled, and wherein the at least one back cover coupling portion comprises a coupling groove, to which the coupling member is coupled.

10 . The linear compressor according to claim 9 , wherein each at least one stator cover coupling portion further comprises an extension that extends from a body of the back cover in the axial direction, and wherein the coupling flange is bent from the extension in a direction crossing the axial direction.

11 . The linear compressor according to claim 9 , wherein the coupling member is coupled to the coupling hole, and wherein the coupling groove faces the back cover coupling portion at a side of the coupling flange.

12 . The linear compressor according to claim 9 , further comprising a spacer disposed between the coupling flange and the back cover coupling portion.

13 . The linear compressor according to claim 12 , wherein the spacer comprises a slot, through which the coupling member passes.

14 . The linear compressor according to claim 12 , wherein a plurality of guide holes, in which guide pins to align the coupling hole and the coupling groove when the back cover is assembled with the stator cover are inserted, are defined in each of the coupling flange and the spacer, and wherein a plurality of guide grooves, into which the guide pins are, respectively, inserted, are defined in the back cover coupling portion.

15 . The linear compressor according to claim 14 , wherein the coupling groove is disposed between the plurality of guide grooves.

16 . The linear compressor according to claim 9 , further comprising a spring device to elastically support the piston, wherein the back cover further comprises at least one spring support to support the spring device.

17 . The linear compressor according to claim 16 , wherein the back cover further comprises a slit disposed between each at least one spring support and each at least one stator cover coupling portion to prevent a force from being transmitted between the spring support and the stator cover coupling portion.

18 . The linear compressor according to claim 16 , wherein a plurality of stator cover coupling portions and a plurality of spring support portions are alternately disposed on the back cover.

19 . The linear compressor according to claim 16 , wherein the spring device comprises at least one spring, and wherein the spring support comprises at least one spring coupling protrusion coupled to the at least one spring.

20 . The linear compressor according to claim 16 , wherein the at least one spring support is spaced apart from the coupling flange in the axial direction.

21 . The linear compressor according to claim 7 , wherein the stator cover further comprises a reinforcing rib that connects the body to the at least one back cover coupling portion.

22 . 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 linear motor to provide power to the piston; a stator cover to support the linear motor together with the frame; at least one spring to allow the piston to resonantly move; and a back cover coupled to the stator cover, wherein the back cover supports the at least one spring.

23 . The linear compressor according to claim 22 , wherein the back cover comprises a body, and a plurality of stator cover coupling portions that extends from the body.

24 . The linear compressor according to claim 23 , wherein each stator cover coupling portion comprises a coupling flange having a coupling hole, to which a coupling member is coupled.

25 . The linear compressor according to claim 24 , wherein each stator cover coupling portion further comprises an extension that extends from the body in the axial direction, and wherein the coupling flange is bent from the extension in a direction that crosses the axial direction.

26 . The linear compressor according to claim 23 , wherein the back cover further comprises a plurality of spring supports that extends from the body, wherein the plurality of spring supports is interposed between the plurality of stator cover coupling portions.

27 . The linear compressor according to claim 26 , wherein a slit is provided between each adjacent spring support and stator cover coupling portion.

28 . A linear compressor, comprising:
a shell, in which a suction inlet is provided; a cylinder disposed in the shell to define a compression

Assignees

• Lg Electronics Inc

Inventors

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

Classifications

• F04B39/121 Primary

  Casings · CPC title

• F04B35/04 Primary

  the means being electric · CPC title

• H02K33/16

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

• F04B35/045

  using solenoids · CPC title

• H02K7/08

  Structural association with bearings · CPC title