Linear compressor

Patent metadata

Field	Value
Publication number	US-10533546-B2
Application number	US-201715585331-A
Country	US
Kind code	B2
Filing date	May 3, 2017
Priority date	May 3, 2016
Publication date	Jan 14, 2020
Grant date	Jan 14, 2020

Abstract

A linear compressor is provided. The linear compressor may include a cylinder including a cylinder body that defines a compression space for a refrigerant and a cylinder flange that extends from the cylinder body in a radial direction; a piston that reciprocates within the cylinder in an axial direction; and a frame coupled to the cylinder. The frame may include a frame body into which the cylinder body may be inserted and a first press-fitting portion press-fitted into the cylinder flange.

First claim

What is claimed is:

1. A linear compressor, comprising:
a cylinder including a cylinder body defining a compression space for a refrigerant and a cylinder flange that extends from the cylinder body in a radial direction;
a piston that reciprocates within the cylinder body in an axial direction; and
a frame coupled to the cylinder, wherein the frame includes:
a frame body into which the cylinder body is inserted;
a frame flange that extends outward from the frame body, the frame flange including a first wall that surrounds an outer circumferential surface of the cylinder flange and in which a first press-fitting portion is formed; and
a sealing member seat that extends inward from the first wall in the radial direction and in which a groove is formed, wherein the cylinder flange includes:
a first flange that extends from an outer circumferential surface of the cylinder body in the radial direction; and
a second flange that extends from the first flange in the axial direction, the second flange having a second press-fitting portion coupled to the first press-fitting portion, wherein a space is defined by the first flange, the second flange, and the cylinder body, to allow deformation of the cylinder flange, and wherein a first sealing member is provided in the groove such that the first flange contacts the first sealing member.

2. The linear compressor according to claim 1 , wherein the first wall of the frame flange is coupled to the outer circumferential surface of the cylinder flange, and wherein the frame flange further includes a second wall that surrounds the first wall.

3. The linear compressor according to claim 2 , wherein the first press-fitting portion is provided on an inner circumferential surface of the first wall, and wherein the second press-fitting portion is provided on an outer circumferential surface of the second flange.

4. The linear compressor according to claim 1 , wherein the cylinder body includes:
a flange coupling portion coupled to the cylinder flange;
a cylinder front portion that extends from the flange coupling portion toward a front end of the cylinder body; and
a cylinder rear portion that extends from the flange coupling portion toward a rear end of the cylinder body.

5. The linear compressor according to claim 4 , wherein the cylinder front portion, the first flange, and the second flange define the space allowing deformation of the cylinder flange.

6. The linear compressor according to claim 1 , further including a second sealing member which is provided in a gas pocket between the frame and the cylinder and contacts the second flange.

7. The linear compressor according to claim 2 , wherein the frame flange further includes a third wall that connects the first wall to the second wall and extends in the radial direction.

8. The linear compressor according to claim 7 , further including:
a discharge valve provided at a front side of the compression space of the cylinder and operated to be opened or closed; and
a frame space defined by the first wall, the second wall, and the third wall and forming a discharge passage through which the refrigerant discharged through the discharge valve flows.

9. The linear compressor according to claim 1 , wherein the frame further includes at least one frame connection portion that extends from the frame flange to the frame body and is inclined at a predetermined angle with respect to an outer circumferential surface of the frame body.

10. The linear compressor according to claim 9 , wherein the at least one frame connection portion includes a plurality of frame connection portions, and one of the plurality of frame connection portions defines a gas hole through which the refrigerant flows.

11. The linear compressor according to claim 1 , further including:
a plurality of terminal insertion portions defined in the frame flange and having a cut-out shape in the axial direction; and
a motor assembly that provides a drive force to the piston and includes a coil and a terminal portion, wherein that the terminal portion is inserted into one of the plurality of terminal insertion portions.

12. The linear compressor according to claim 1 , further including:
a gas inflow provided on the outer circumferential surface of the cylinder body and in which a cylinder filter member is provided; and
a cylinder nozzle that extends inward from the gas inflow in the radial direction and supplies the refrigerant toward an inner circumferential surface of the cylinder body, wherein a ratio of a length of the cylinder nozzle in the radial direction to a length of the gas inflow in the radial direction is in a range of about 0.65 to about 0.75.

13. The linear compressor according to claim 6 , wherein the cylinder body of the cylinder includes a cylinder groove, and wherein a third sealing member is provided in the cylinder groove.

14. The linear compressor according to claim 13 , wherein the frame includes an installation groove, and wherein a fourth sealing member is provided in the installation groove.

15. The linear compressor according to claim 14 , wherein each of the first sealing member, the second sealing member, the third sealing member, and the fourth sealing member have a ring shape.

Assignees

• Lg Electronics Inc

Inventors

• Kim Hyunsoo
• Kang Donghan
• Kim Junghae
• Ahn Kwangwoon
• Hong Eonpyo

Classifications

• F04B35/045

  using solenoids · CPC title

• F04B39/127 Primary

  Mounting of a cylinder block in a casing · CPC title

• F04B39/00 Primary

  Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 · CPC title

• F04B39/0292

  Lubrication of pistons or cylinders · CPC title

• F04B39/123

  Fluid connections · CPC title