Scroll compressor

Patent metadata

Field	Value
Publication number	US-12000394-B2
Application number	US-202217993605-A
Country	US
Kind code	B2
Filing date	Nov 23, 2022
Priority date	Jan 14, 2022
Publication date	Jun 4, 2024
Grant date	Jun 4, 2024

Abstract

A scroll compressor is disclosed. The scroll compressor may include an anti-rotation mechanism provided with an anti-rotation pin and an anti-rotation ring between an orbiting scroll and a scroll support member facing the orbiting scroll, and an axial thickness of the ring body portion constituting the anti-rotation ring may be larger than an axial depth of a ring insertion groove in which the anti-rotation ring is inserted. This can allow the orbiting scroll and a member facing the same to be spaced physically apart without a separate member, to secure a gap for oil to flow, such that the oil can be smoothly supplied between the orbiting scroll and the member, thereby suppressing seizure or/and friction loss between the orbiting scroll and the member.

First claim

What is claimed is:

1. A scroll compressor comprising:
a casing;
a fixed scroll disposed in the casing;
an orbiting scroll configured to engage the fixed scroll and define a compression chamber together with the fixed scroll;
a scroll support member disposed at a side of the orbiting scroll in an axial direction and configured to support the orbiting scroll in the axial direction;
an anti-rotation pin disposed at one of a side surface of the orbiting scroll or a side surface of the scroll support member facing the side surface of the orbiting scroll;
a ring insertion groove defined at a side surface of a portion that faces the anti-rotation pin; and
an anti-rotation ring including:
a ring body portion inserted into the ring insertion groove and configured to rotate relative to the ring insertion groove, and
a pin coupling portion disposed at the ring body portion and configured to couple the anti-rotation pin,

wherein an axial thickness of the ring body portion is greater than an axial depth of the ring insertion groove,
wherein an oil groove is defined at a side surface of the scroll support member facing the orbiting scroll,
wherein the oil groove fluidly connects an outer circumferential surface to an inner circumferential surface of the scroll support member, and
wherein the oil groove includes:
a plurality of first oil grooves that extend between the outer circumferential surface and the inner circumferential surface of the scroll support member and that are spaced apart from each other along a circumferential direction of the scroll support member, and
at least one second oil groove that is defined in an annular shape along the circumferential direction of the scroll support member and that is in fluid communication with the plurality of first oil grooves.

2. The scroll compressor of claim 1 , wherein the axial thickness of the ring body portion is smaller than or equal to twice the axial depth of the ring insertion groove.

3. The scroll compressor of claim 1 , wherein the pin coupling portion is offset from a center of the ring body portion.

4. The scroll compressor of claim 1 , wherein the pin coupling portion is defined through side surfaces of the ring body portion in the axial direction or recessed from one of the side surfaces of the ring body portion, and
wherein an inner diameter of the pin coupling portion is larger than an outer diameter of the anti-rotation pin.

5. The scroll compressor of claim 4 , wherein a first end of the anti-rotation pin is fixed to the scroll support member, and a second end of the anti-rotation pin is rotatably coupled to the pin coupling portion.

6. The scroll compressor of claim 1 , wherein the anti-rotation pin extends integrally from the pin coupling portion, and
wherein a pin insertion groove is defined at the scroll support member and receives the anti-rotation pin to enable the anti-rotation pin to rotate.

7. The scroll compressor of claim 1 , wherein a weight-reducing portion is defined through side surfaces of the ring body portion in the axial direction or recessed from one of the side surfaces of the ring body portion.

8. The scroll compressor of claim 1 , wherein an oil separator is disposed outside the casing and configured to separate oil from refrigerant discharged from the casing,
wherein an oil return pipe connects the oil separator and an inside of the casing, and
wherein the oil return pipe is connected to the inside of the casing at a position that faces a portion between the orbiting scroll and the scroll support member in a radial direction.

9. The scroll compressor of claim 1 , wherein a weight-reducing portion is recessed from one of the side surfaces of the ring body portion.

10. The scroll compressor of claim 1 , wherein the ring body portion has a disk shape and is entirely blocked except for the pin coupling portion.

11. The scroll compressor of claim 10 , wherein the ring body portion has a consistent height.

12. The scroll compressor of claim 1 , wherein the ring body portion includes a weight-reducing portion at a side of the pin coupling portion.

13. The scroll compressor of claim 12 , wherein the ring body portion includes a reinforcing portion that is disposed between the weight-reducing portion and the pin coupling portion and surrounds the pin coupling portion.

14. The scroll compressor of claim 13 , wherein an area of the reinforcing portion is smaller than or equal to an area of the weight-reducing portion.

15. The scroll compressor of claim 13 , wherein the reinforcing portion is provided based on the weight-reducing portion being spaced apart from the pin coupling portion in a radial direction, and
wherein an outer circumferential surface of the reinforcing portion includes a curved surface having the same center as a center of the pin coupling portion.

16. The scroll compressor of claim 15 , wherein an outer diameter of the reinforcing portion is twice larger than or four times smaller than an inner diameter of the pin coupling portion.

17. A scroll compressor, comprising:
a casing;
a fixed scroll disposed in the casing;
an orbiting scroll configured to engage the fixed scroll and define a compression chamber;
a scroll support member disposed at a side of the orbiting scroll in an axial direction and configured to support the orbiting scroll in the axial direction;
an anti-rotation pin disposed at one of a side surface of the orbiting scroll or a side surface of the scroll support member facing the side surface of the orbiting scroll;
a ring insertion groove defined at a side surface of a portion that faces the anti-rotation pin; and
an anti-rotation ring including:
a ring body portion inserted into the ring insertion groove and configured to rotate relative to the ring insertion groove, and
a pin coupling portion disposed at the ring body portion and configured to couple the anti-rotation pin,

wherein the pin coupling portion is offset from a center of the ring body portion, and
wherein an axial thickness of the ring body portion is smaller than or equal to twice an axial depth of the ring insertion groove,
wherein an oil separator is disposed outside the casing and configured to separate oil from refrigerant discharged from the casing,
wherein an oil return pipe connects the oil separator and an inside of the casing, and
wherein the oil return pipe is connected to the inside of the casing at a position that faces a portion between the orbiting scroll and the scroll support member in a radial direction,
wherein an oil groove is defined at a side surface of the scroll support member facing the orbiting scroll,
wherein the oil groove fluidly connects an outer circumferential surface to an inner circumferential surface of the scroll support member, and
wherein the oil groove includes:
a plurality of first oil grooves that extend between the outer circumferential surface and the inner circumferential surface of the scroll support member and that are spaced apart from each other along a circumferential direction of the scroll support member, and
at least one second oil groove that is defined in an annular shape along the circumferential direction of the scroll support member and that is in fluid communication with the plurality of first oil grooves.

18. The scroll compressor of claim 17 , wherein the pin coupling portion is defined through side surfaces of the ring body portion in the axial direction or recessed from one of the side surfaces of the ring body portion, and
wherein an inner diameter of the pin coupling port

Assignees

• Lg Electronics Inc

Inventors

• Park Gunyoung
• Moon Seokhwan
• Jang Kitae
• Her Jongtae

Classifications

• F04C18/0215 Primary

  where only one member is moving · CPC title

• F04C29/0042

  Driving elements, brakes, couplings, transmissions specially adapted for pumps (brakes, couplings, transmissions per se F16, B60) · CPC title

• F01C17/063

  with only rolling movement · CPC title

• F04C2270/16

  Wear · CPC title

• F04C29/0057

  for eccentric movement · CPC title