Compressor

Patent metadata

Field	Value
Publication number	US-9945381-B2
Application number	US-201414587901-A
Country	US
Kind code	B2
Filing date	Dec 31, 2014
Priority date	Aug 7, 2014
Publication date	Apr 17, 2018
Grant date	Apr 17, 2018

Abstract

A compressor is provided that may include a passage separator provided between an electric motor drive and a compression device to separate a refrigerant passage from an oil passage. The passage separator may include a first partition wall and a second partition wall. The first partition wall may be disposed between an inner circumferential surface of a casing and a discharge hole of the compression device, and the second partition wall may be disposed between the discharge hole and a balance weight. Accordingly, the refrigerant passage may be separated from the oil passage between the compression device and electric motor drive, thereby efficiently recovering oil to an oil storage space.

First claim

What is claimed is:

1. A compressor, comprising:
a casing having an internal space;
a drive comprising a stator fixed to the internal space, a cut surface being provided on an outer circumferential surface of the stator to be separated from an inner circumferential surface of the casing, and a rotor rotatably provided within the stator;
a compression device provided at one side of the drive and having a discharge hole so as to discharge compressed refrigerant into an internal space of the casing; a rotational shaft configured to transfer a drive force from the drive to the compression device; and
a passage separator provided between the drive and the compression device to separate a refrigerant passage from an oil passage, wherein the passage separator surrounds at least a portion of the discharge hole and guides compressed refrigerant coming out of the discharge hole in an axial direction of the rotational shaft.

2. The compressor of claim 1 , wherein the passage separator is formed in a tube shape to accommodate the discharge hole, and wherein an end of the passage separator on a side adjacent the drive is formed to have a height difference.

3. The compressor of claim 2 , wherein the end of the passage separator is formed such that a first surface located at an outer side of the discharge hole with respect to the rotational shaft is formed to be higher than a second surface located at an inner side thereof.

4. The compressor of claim 1 , wherein the passage separator is formed in an arcuate cross-sectional shape.

5. A compressor, comprising:
a casing having an internal space;
a drive comprising a stator fixed in the internal space and a rotor rotatably provided within the stator;
a compression device provided at one side of the drive and having a discharge hole so as to discharge compressed refrigerant into the internal space of the casing;
a rotational shaft configured to transfer a drive force from the drive to the compression device;
a balance weight provided on the rotor or the rotational shaft; and
a passage separator provided between the drive and the compression device to separate a refrigerant passage from an oil passage, wherein the passage separator includes a first partition wall and a second partition wall, wherein the first partition wall is provided between an inner circumferential surface of the casing and the discharge hole of the compression device, and the second partition wall is provided between the discharge hole and balance weight, wherein the compression device further includes at least one oil recovery passage that communicates with the oil passage and is provided at one side of the compression device, wherein the first partition wall and second partition wall are connected by a third partition wall, and wherein at least a portion of the oil recovery passage is covered by the third partition wall.

6. The compressor of claim 5 , wherein the first partition wall, the second partition wall, and the third partition wall are formed as an integral body.

7. The compressor of claim 6 , wherein the integral body is fixed to the compression device.

8. The compressor of claim 5 , wherein the oil recovery passage is covered by a member separate from the passage separator.

9. The compressor of claim 5 , wherein the oil recovery passage includes a hole that passes through the compression device.

10. A compressor, comprising:
a casing having an internal space;
a drive comprising a stator fixed in the internal space and a rotor rotatably provided within the stator;
a compression device provided at a lower side of the drive, having a plurality of compression chambers and a discharge hole so as to discharge compressed refrigerant from the plurality of compression chambers into the internal space of the casing;
a rotational shaft configured to transfer a drive force from the drive to the compression device, the rotating shaft having an eccentric portion to be coupled through a central portion of the compression device to overlap the compression chamber in a radial direction;
a balance weight provided on the rotor or the rotational shaft; and
a passage separator provided between the drive and the compression device to separate a refrigerant passage from an oil passage, wherein the passage separator includes a first partition wall and a second partition wall, wherein the first partition wall is provided between an inner circumferential surface of the casing and the discharge hole of the compression device, and the second partition wall is provided between the discharge hole and balance weight, wherein the compression device further includes at least one oil recovery passage that communicates with the oil passage and is provided at one side of the compression device, wherein the first partition wall and second partition wall are connected by a third partition wall, and wherein at least a portion of the oil recovery passage is covered by the third partition wall.

11. The compressor of claim 10 , wherein the first partition wall, the second partition wall, and the third partition wall are formed as an integral body.

12. The compressor of claim 11 , wherein the integral body is fixed to the compression device.

13. The compressor of claim 10 , wherein the oil recovery passage is covered by a member separate from the passage separator.

14. The compressor of claim 10 , wherein the oil recovery passage includes a hole that passes through the compression device.

Assignees

• Lg Electronics Inc

Inventors

• Lee Kangwook
• Kim Cheolhwan
• Lee Byeongchul

Classifications

• F04C29/025

  using a lubricant pump · CPC title

• F04C29/0085

  Prime movers · CPC title

• F04C18/0215 Primary

  where only one member is moving · CPC title

• F04C2240/807

  Balance weight, counterweight · CPC title

• F04C29/028

  Means for improving or restricting lubricant flow · CPC title