Linear compressor

Patent metadata

Field	Value
Publication number	US-10280914-B2
Application number	US-201715585394-A
Country	US
Kind code	B2
Filing date	May 3, 2017
Priority date	May 3, 2016
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

A linear compressor is provided. The linear compressor may include a cylinder; a frame coupled to an outer side of the cylinder; a cylinder groove defined on an outer circumferential surface of the cylinder; and a sealing member provided in the cylinder groove. The sealing member may be provided between the outer circumferential surface of the cylinder and an inner circumferential surface of the frame.

First claim

What is claimed is:

1. A linear compressor, comprising:
a piston that reciprocates in an axial direction;
a cylinder into which the piston is inserted and which defines a compression space for a refrigerant;
a frame coupled to an outer side of the cylinder;
a cylinder groove defined on an outer circumferential surface of the cylinder; and
a sealing member provided in the cylinder groove, wherein the sealing member is provided between the outer circumferential surface of the cylinder and an inner circumferential surface of the frame.

2. The linear compressor according to claim 1 , wherein the frame includes:
a frame body having an inner circumferential surface that surrounds the cylinder; and
a sealing member pressing portion that protrudes from the inner circumferential surface of the frame body and presses the sealing member.

3. The linear compressor according to claim 2 , wherein the sealing member pressing portion protrudes from the inner circumferential surface of the frame body in a direction toward the outer circumferential surface of the cylinder.

4. The linear compressor according to claim 3 , wherein a space between the inner circumferential surface of the frame body and the outer circumferential surface of the cylinder includes:
a gas pocket through which a refrigerant gas flows; and
a sealing pocket that defines an installation space for the sealing member.

5. The linear compressor according to claim 4 , wherein the sealing member pressing portion extends from a boundary point between the gas pocket and the sealing pocket to an end of the frame.

6. The linear compressor according to claim 4 , wherein a height of the sealing pocket in a radial direction is less than a diameter of the sealing member such that the sealing member is positioned in a state of being compressed or deformed within the sealing pocket.

7. The linear compressor according to claim 6 , wherein the sealing member pressing portion includes a press inclination portion that extends at an incline in a radial direction and presses the sealing member.

8. The linear compressor according to claim 1 , wherein the outer circumferential surface of the cylinder includes a first outer circumferential surface provided at a front side of the cylinder groove and a second outer circumferential surface provided at a rear side of the cylinder groove, and wherein a thickness of the cylinder at the first outer circumferential surface is greater than a thickness of the cylinder at the second outer circumferential surface.

9. The linear compressor according to claim 1 , further including:
an installation groove defined on the outer circumferential surface of the frame; and
a sealing member provided in the installation groove to seal a space between an inner stator and the installation groove.

10. The linear compressor according to claim 1 , wherein the cylinder includes:
a cylinder body that defines the compression space for the refrigerant and having the cylinder groove; and
a cylinder flange that extends from the cylinder body in a radial direction.

11. The linear compressor according to claim 10 , wherein the frame includes:
a frame body into which the cylinder body is inserted; and
a press-fitting portion press-fitted into the cylinder flange.

12. A linear compressor, comprising:
a piston that reciprocates in an axial direction;
a cylinder into which the piston is inserted and which defines a cylinder groove;
a frame coupled to an outer side of the cylinder; and
a sealing member provided in the cylinder groove, the sealing member being pressed by the frame, wherein a space between an outer circumferential surface of the cylinder and an inner circumferential surface of the frame includes:
a gas pocket through which a refrigerant gas flows; and
a sealing pocket in which the sealing member is provided.

13. The linear compressor according to claim 12 , wherein the frame includes a press inclination portion that protrudes from the inner circumferential surface of the frame toward the outer circumferential surface of the cylinder and extends at an incline inward in a radial direction.

14. The linear compressor according to claim 13 , wherein the press inclination portion surrounds the cylinder groove.

15. The linear compressor according to claim 13 , wherein the sealing pocket is defined in a space between the cylinder groove and the press inclination portion.

16. A linear compressor, comprising:
a piston that reciprocates in an axial direction;
a cylinder into which the piston is inserted and which defines a compression space for a refrigerant;
a frame coupled to an outer side of the cylinder;
a cylinder groove defined on an outer circumferential surface of the cylinder; and
a sealing member provided in the cylinder groove, wherein the sealing member is provided between the outer circumferential surface of the cylinder and an inner circumferential surface of the frame, wherein the outer circumferential surface of the cylinder includes a first outer circumferential surface provided at a front side of the cylinder groove and a second outer circumferential surface provided at a rear side of the cylinder groove, and wherein a thickness of the cylinder at the first outer circumferential surface is different than a thickness of the cylinder at the second outer circumferential surface.

17. The linear compressor according to claim 16 , wherein a space between the inner circumferential surface of the frame body and the outer circumferential surface of the cylinder includes:
a gas pocket through which a refrigerant gas flows; and
a sealing pocket that defines an installation space for the sealing member.

18. The linear compressor according to claim 17 , wherein the frame comprises:
a frame body having an inner circumferential surface that surrounds the cylinder; and
a sealing member pressing portion that protrudes from the inner circumferential surface of the frame body and presses the sealing member, wherein the sealing member pressing portion extends from a boundary point between the gas pocket and the sealing pocket to an end of the frame.

19. The linear compressor according to claim 17 , wherein a height of the sealing pocket in a radial direction is less than a diameter of the sealing member such that the sealing member is positioned in a state of being compressed or deformed within the sealing pocket.

20. The linear compressor according to claim 18 , wherein the sealing member pressing portion includes a press inclination portion that extends at an incline in a radial direction and presses the sealing member.

Assignees

• Lg Electronics Inc

Inventors

• Han Youngcheol
• Kang Donghan
• Park Joonsung
• Ahn Kwangwoon
• Lim Sanghyun

Classifications

• F04B39/127 Primary

  Mounting of a cylinder block in a casing · CPC title

• F04B35/04 Primary

  the means being electric · CPC title

• F04B35/045

  using solenoids · CPC title

• F04B39/0292

  Lubrication of pistons or cylinders · CPC title

• F04B39/122 Primary

  Cylinder block · CPC title