Linear compressor

Patent metadata

Field	Value
Publication number	US-11255577-B2
Application number	US-201916457543-A
Country	US
Kind code	B2
Filing date	Jun 28, 2019
Priority date	Jun 29, 2018
Publication date	Feb 22, 2022
Grant date	Feb 22, 2022

Abstract

Provided is a linear compressor. Provided is a linear compressor. The linear compressor includes a shell defining an internal space, a compressor body disposed in the internal space, and a passage guide disposed between the shell and the compressor body. The passage guide may include a first guide part extending along an inner surface of the shell in an axial direction and a second guide part extending from the first guide part to the compressor body in a radial direction.

First claim

What is claimed is:

1. A linear compressor comprising:
a shell that defines an internal space therein;
a first shell cover coupled to a rear end of the shell;
a second shell cover coupled to a front end of the shell;
a compressor body disposed in the internal space of the shell, the compressor body comprising:
a cylinder,
a frame that accommodates at least a portion of the cylinder, and
a discharge cover coupled to a front surface of the frame, a front end of the discharge cover facing the second shell cover; and

a passage guide disposed between the front surface of the frame and the front end of the discharge cover, the passage guide dividing the internal space of the shell into (i) a first space between the second shell cover and the passage guide and (ii) a second space between the passage guide and the first shell cover,
wherein the passage guide comprises:
a first guide part that extends along an inner surface of the shell in an axial direction of the shell, and
a second guide part that extends from the first guide part toward the discharge cover in a radial direction of the shell, and

wherein a first passage is defined between an inner end of the second guide part and the discharge cover, the first passage being configured to allow refrigerant in the first space to flow toward the second space to thereby dissipate heat from the frame.

2. The linear compressor according to claim 1 , wherein a portion of the second guide part overlaps with the front surface of the frame along the axial direction.

3. The linear compressor according to claim 2 ,
wherein the discharge cover comprises:
a cover flange part coupled to the front surface of the frame; and
a chamber part that extends from the cover flange part toward the second shell in the axial direction,

wherein the first guide part is disposed out of the chamber part or outside of the cover flange part in the radial direction, and
wherein the second guide part is disposed between the second shell cover and the front surface of the frame.

4. The linear compressor according to claim 3 , wherein the second guide part comprises a guide rear surface that faces the first shell cover, and
wherein the guide rear surface extends in the radial direction along a plane defined by the cover flange part.

5. The linear compressor according to claim 4 , wherein the guide rear surface and the front surface of the frame are spaced apart from each other to thereby define a second passage between the guide rear surface and the front surface of the frame, the second passage being configured to allow the refrigerant having passed through the first passage to flow to the second space, and
wherein a width of the second passage is less than a thickness of the first guide part in the radial direction or a thickness of the second guide part in the axial direction.

6. The linear compressor according to claim 5 , wherein the passage guide further comprises a plurality of protrusions that protrude from the guide rear surface in the axial direction.

7. The linear compressor according to claim 4 , wherein the second guide part comprises a guide inner end surface that faces the cover flange part, and
wherein the guide inner end surface and the cover flange part are spaced apart from each other to thereby define the first passage, and
wherein a distance between the guide inner end surface and the cover flange part is less than a thickness of the first guide part in the radial direction or a thickness of the second guide part in the axial direction.

8. The linear compressor according to claim 7 , wherein the guide inner end surface defines a guide through-hole that receives the discharge cover, the guide through-hole having a shape corresponding to an outer contour of the cover flange part in the radial direction.

9. The linear compressor according to claim 3 , wherein the second guide part comprises:
a guide inner end surface that extends toward the chamber part; and
a guide rear surface that extends from the guide inner end surface in the radial direction and that is disposed between the second shell cover and a rear surface of the cover flange part, the rear surface of the cover flange part being in contact with the front surface of the frame.

10. The linear compressor according to claim 9 , wherein the guide inner end surface defines a guide through-hole that receives the discharge cover, the guide through-hole having a shape corresponding to an outer contour of the cover flange part in the radial direction.

11. The linear compressor according to claim 1 , wherein the first guide part comprises:
a guide outer surface that contacts the inner surface of the shell;
a guide inner surface that is disposed at an opposite side of the guide outer surface; and
a guide front end surface that faces the second shell cover and connects together front ends of the guide outer surface and the guide inner surface, and
wherein the second guide part extends from rear ends of the guide outer surface and the guide inner surface in the radial direction.

12. The linear compressor according to claim 11 , wherein the passage guide further comprises a fixed protrusion that protrudes outward from the guide outer surface in the radial direction and that is inserted into the inner surface of the shell.

13. The linear compressor according to claim 1 , wherein the first guide part of the passage guide and the discharge cover extend toward the second shell cover along the axial direction.

14. The linear compressor according to claim 13 , wherein the front end of the discharge cover is disposed between the second shell cover and the passage guide.

15. A linear compressor comprising:
a shell having a cylindrical shape, the shell having a front opening and a rear opening that are spaced apart from each other in an axial direction of the shell;
a first shell cover that covers the rear opening of the shell;
a second shell cover that covers the front opening of the shell;
a cylinder that extends in the axial direction;
a piston disposed in the cylinder;
a frame that accommodates at least a portion of the cylinder;
a discharge cover that is coupled to the frame and that allows flow of compressed refrigerant therethrough, the discharge cover having a front end facing the second shell cover and a rear end coupled to the frame; and
a passage guide disposed outside of the discharge cover in a radial direction of the shell and disposed between the second shell cover and the frame in the axial direction,
wherein the frame comprises:
a frame body that accommodates at least the portion of the cylinder and extends toward the first shell cover, and
a frame flange that extends from a front end of the frame body in the radial direction, the frame flange comprising a discharge frame surface that is coupled to the discharge cover and that is disposed at a front surface of the frame flange facing the second shell cover,

wherein the discharge frame surface comprises:
a frame coupling surface that contacts the rear end of the discharge cover, and
a frame heat dissipation surface that is defined outside of the frame coupling surface in the radial direction and that overlaps with the passage guide along the axial direction of the shell, and

wherein the passage guide is disposed closer to the frame heat dissipation surface than to the front end of the discharge cover, the passage guide defining a refrigerant passage between the discharge cover and the frame heat dissipation surface.

16. The linear compressor according to claim 15 , wherein the frame coupling surface is c

Assignees

• Lg Electronics Inc

Inventors

• Noh Kiwon
• Park Jungsik
• Lee Kyunyoung
• Lee Jongwoo

Classifications

• F25B2309/001

  with a linear configuration or a linear motor · CPC title

• F04B39/0055

  with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes · CPC title

• F04B39/06

  Cooling; Heating; Prevention of freezing · CPC title

• F04B35/045 Primary

  using solenoids · CPC title

• F04B35/04 Primary

  the means being electric · CPC title