Scroll compressor

Patent metadata

Field	Value
Publication number	US-11181109-B2
Application number	US-201916414110-A
Country	US
Kind code	B2
Filing date	May 16, 2019
Priority date	May 17, 2018
Publication date	Nov 23, 2021
Grant date	Nov 23, 2021

Abstract

A scroll compressor includes a refrigerant discharge flow passage and an oil recovery flow passage that are separated from each other. The scroll compressor further includes a flow passage separation unit configured to separate an intermediate space between a drive portion and a compression portion into an inner space communicating with the refrigerant flow passage and an outer space communicating with the oil flow passage to separate the refrigerant discharge path from the oil recovery path.

First claim

What is claimed is:

1. A scroll compressor comprising:
a casing;
a drive portion coupled to an interior of the casing;
a rotary shaft that extends from the drive portion and that is configured to be rotated by the drive portion;
a compression portion coupled to the rotary shaft and configured to compress and discharge refrigerant; and
a flow passage separation unit that divides a space defined between the drive portion and the compression portion into an inside space and an outside space, the outside space being radially outward from the inside space with respect to the rotary shaft, the flow passage separation unit comprising:
a first flow passage guide that extends from the compression portion toward the drive portion, the first flow passage guide comprising a first annular wall portion that extends from the compression portion toward the drive portion,
a second flow passage guide that extends from the drive portion toward the compression portion, the second flow passage guide comprising a first extended portion that extends from the drive portion toward the compression portion and that is radially inward from the first annular wall portion with respect to the rotary shaft, and
a sealing member that contacts at least one of the first annular wall portion or the first extended portion and covers a gap defined between the first annular wall portion and the first extended portion.

2. The scroll compressor of claim 1 ,
wherein the sealing member has a first surface that contacts a side surface of the first annular wall portion and a second surface that contacts a side surface of the first extended portion.

3. The scroll compressor of claim 1 , wherein the sealing member accommodates a first end of the first flow passage guide and contacts a second end of the second flow passage guide.

4. The scroll compressor of claim 3 ,
wherein the sealing member comprises:
a first sealing portion that contacts a first surface of the first annular wall portion,
a second sealing portion that contacts both of a second surface of the first annular wall portion opposite to the first surface and a surface of the first extension portion, and
a third sealing portion that connects the first sealing portion to the second sealing portions.

5. The scroll compressor of claim 1 , wherein the sealing member has a C-shape, and receives at least a portion of the first flow passage guide.

6. The scroll compressor of claim 1 ,
wherein the sealing member comprises:
a first sealing portion that contacts a side surface of the first annular wall portion, and
a second sealing portion that extends from the first sealing portion and that contacts an end of the first extended portion.

7. The scroll compressor of claim 6 , wherein the first flow passage guide further comprises:
a second annular wall portion that is radially spaced apart from the first annular wall portion and that extends from the compression portion toward the drive portion; and
an annular surface portion that connects the first annular wall portion to the second annular wall portion and that contacts a surface of the compression portion, and
wherein the first sealing portion contacts both of the annular surface portion and the first annular wall portion.

8. The scroll compressor of claim 7 , wherein a height of the first sealing portion is equal to a distance from the annular surface portion to the end of the first extended portion.

9. The scroll compressor of claim 1 , wherein the first extended portion is spaced apart from the first annular wall portion in a radial direction of the rotary shaft, and an end of the first extended portion is longitudinally spaced apart from an end of the first annular wall portion, and wherein the sealing member has an L-shape and is configured to cover a gap defined between the first annular wall portion and the first extended portion.

10. The scroll compressor of claim 1 , wherein the first flow passage guide is spaced apart from the second flow passage guide in a radial direction of the rotary shaft, and
wherein the sealing member comprises end portions that are supported by the first flow passage guide and the second flow passage guide.

11. The scroll compressor of claim 10 ,
wherein the first extended portion is spaced apart from an end of the first annular wall portion in the radial direction of the rotary shaft, and
wherein the sealing member contacts both of an inner surface of the first annular wall portion and an outer surface of the first extended portion.

12. The scroll compressor of claim 11 , wherein the sealing member extends in a longitudinal direction between the drive portion and the compression portion, and
wherein a length of the sealing member in the longitudinal direction is greater than a length of each of the first annular wall portion and the first extended portion in the longitudinal direction.

13. The scroll compressor of claim 1 , wherein the sealing member is disposed between the first flow passage guide and the second flow passage guide, the sealing member being in surface contact with the first flow passage guide and the second flow passage guide.

14. The scroll compressor of claim 13 , wherein the first flow passage guide and the second flow passage guide partially overlap each other in a radial direction of the drive portion.

15. The scroll compressor of claim 14 , wherein the sealing member has a C-shape, and
wherein the sealing member has:
an inner surface that is coupled to the first flow passage guide and that contacts the first flow passage guide; and
an outer surface, a part of the outer surface contacting a side surface of the second flow passage guide.

16. The scroll compressor of claim 14 , wherein the sealing member has an L-shape, and
wherein the sealing member has:
an end portion disposed at a first side of the sealing member and supported by the first flow passage guide; and
a contact surface that is disposed at a second side of the sealing member opposite the first side and that contacts the drive portion or the second flow passage guide.

17. The scroll compressor of claim 14 , wherein the sealing member has a straight-line shape, and
wherein the sealing member has:
a first surface that contacts the first flow passage guide; and
a second surface that contacts the second flow passage guide.

18. The scroll compressor of claim 1 , further comprising:
a stator coupled to an inner space of the casing, the stator comprising a coil winding portion around which one or more coils are wound, the coil winding portion being disposed at an inner circumferential surface of the stator;
a rotator accommodated in the stator and configured to rotate relative to the stator;
a main frame that is spaced apart from the stator and that supports the rotary shaft, the rotary shaft extending through the main frame;
a fixed scroll disposed at a surface of the main frame; and
a rotating scroll that is disposed between the main frame and the fixed scroll and that is pivotally engaged with the fixed scroll to thereby define a compression chamber,
wherein the first flow passage guide extends from the main frame toward the stator, and the second flow passage guide extends from the stator toward the main frame, and
wherein the sealing member has a first surface that contacts the first flow passage guide, and a second surface that contacts the second flow passage guide.

19. The scroll compressor of claim 18 , wherein the sealing member has a C-shape, and
wherein the first surface receives an end of

Assignees

• Lg Electronics Inc

Inventors

• Jeon Nayoung
• Kim Taekyoung
• Kim Cheolhwan

Classifications

• F04C29/045

  of the electric motor in hermetic pumps · CPC title

• F04C18/0215 Primary

  where only one member is moving · CPC title

• F04C29/026 Primary

  Lubricant separation · CPC title

• F04C2240/102

  with means for discharging condensate or liquid separated from the gas pumped · CPC title

• F04C27/00

  Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids · CPC title