Linear compressor

Abstract

The present invention discloses a linear compressor including a cylinder in which refrigerants flow to the axial direction, a piston reciprocated inside the cylinder, for compressing the refrigerants, and a linear motor for driving the piston. At least one of the cylinder and the piston is sintering molded.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will become better understood with reference to the accompanying drawings which are given only by way of illustration and thus are not limitative of the present invention, wherein:

FIG. 1 is a side-sectional view illustrating part of a conventional linear compressor;

FIG. 2 is a side-sectional view illustrating a piston of the conventional linear compressor;

FIG. 3 is a perspective view illustrating a cylinder of the conventional linear compressor;

FIG. 4 is a disassembly side-sectional view illustrating a first example of a piston of a linear compressor in accordance with the present invention;

FIG. 5 is a disassembly side-sectional view illustrating a second example of the piston of the linear compressor in accordance with the present invention;

FIG. 6 is a disassembly side-sectional view illustrating a third example of the piston of the linear compressor in accordance with the present invention; and

FIG. 7 is a perspective view illustrating a cylinder of the linear compressor in accordance with the present invention.

Claims

1. A linear compressor, comprising: a cylinder in which refrigerants flow to the axial direction;a piston reciprocated inside the cylinder, for compressing the refrigerants; anda linear motor for driving the piston,wherein at least one of the cylinder and the piston is sintering molded.

2. The linear compressor of claim 1, wherein at least part of the piston is sintering molded.

3. The linear compressor of claim 1, wherein the piston comprises at least two sintering molded members.

4. The linear compressor of claim 1, wherein the piston comprises a connection unit for interworking with the linear motor, a compression unit for compressing the refrigerants, and a piston main body for connecting the connection unit to the compression unit, wherein at least one of the connection unit, the compression unit and the piston main body is sintering molded.

5. The linear compressor of claim 4, wherein the compression unit comprises a communication hole for discharging the compressed refrigerants.

6. The linear compressor of claim 4, wherein the connection unit comprises a fastening hole for connecting the piston to the linear motor.

7. The linear compressor of claim 3, wherein one of at least two members is inserted into the other member.

8. The linear compressor of claim 3, wherein at least two members are made of materials with different thermal expansion coefficients.

9. The linear compressor of claim 1, wherein the piston comprises a connection unit for interworking with the linear motor, a compression unit for compressing the refrigerants, and a piston main body for connecting the connection unit to the compression unit, wherein the connection unit and one part of the piston main body are sintering molded as a single body, and the compression unit and the other part of the piston main body are sintering molded as a single body.

10. The linear compressor of claim 9, wherein one part of the piston main body is coupled to the other part of the piston main body.

11. The linear compressor of claim 1, wherein the piston comprises a connection unit for interworking with the linear motor, a compression unit for compressing the refrigerants, and a piston main body for connecting the connection unit to the compression unit, wherein the compression unit and the piston main body are sintering molded as a single body.

12. The linear compressor of claim 11, wherein the connection unit comprises a hole to which the piston main body is coupled.

13. The linear compressor of claim 1, wherein the piston comprises a connection unit for interworking with the linear motor, a compression unit for compressing the refrigerants, and a piston main body for connecting the connection unit to the compression unit, wherein the connection unit and the piston main body are sintering molded as a single body.

14. The linear compressor of claim 13, wherein the compression unit comprises a step unit coupled to the piston main body.

15. The linear compressor of claim 1, wherein the cylinder is sintering molded.

16. The linear compressor of claim 1, wherein the cylinder comprises a rotation restriction member for fixing the position of the cylinder.

17. The linear compressor of claim 16, wherein the rotation restriction member is a rotation prevention unit disposed on the outer circumference of the cylinder.

18. The linear compressor of claim 16, comprising a frame for fixing the cylinder, wherein the cylinder comprises a flange unit coupled to the frame.

19. The linear compressor of claim 18, wherein the cylinder comprises a rotation restriction member for fixing the position of the cylinder, the rotation restriction member being a straight line unit disposed at the flange unit.

20. The linear compressor of claim 15, wherein a slope is formed on the outer circumference of the cylinder.

21. The linear compressor of claim 1, wherein at least one of the cylinder and the piston is steam-processed after sintering molding.