Scroll compressor

Patent metadata

Field	Value
Publication number	US-11067079-B2
Application number	US-201916660044-A
Country	US
Kind code	B2
Filing date	Oct 22, 2019
Priority date	Nov 16, 2018
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

A scroll compressor is provided that may include a frame; a non-orbiting scroll provided with a non-orbiting wrap formed on a first side surface of a non-orbiting end plate in an axial direction; an orbiting scroll provided with an orbiting wrap formed on a first side surface of the orbiting end plate in the axial direction and engaged with the non-orbiting wrap to form a compression chamber; a plurality of first guides disposed between the frame and the non-orbiting scroll to be located radially outward from the non-orbiting wrap; and a plurality of second guides provided on the orbiting end plate to be located radially outward from the orbiting wrap, respectively, so as to allow an orbiting motion of the orbiting scroll together with the first guides.

First claim

What is claimed is:

1. A scroll compressor, comprising:
a frame;
a non-orbiting scroll provided with a non-orbiting end plate coupled to one side of the frame in an axial direction of the frame, and a non-orbiting wrap formed on a side surface of the non-orbiting end plate in the axial direction;
an orbiting scroll provided with an orbiting end plate located between the frame and the non-orbiting scroll, and an orbiting wrap formed on a side surface of the orbiting end plate in the axial direction and engaged with the non-orbiting wrap to form a compression chamber;
a plurality of first guides disposed between the frame and the non-orbiting scroll so as to be located outward from the non-orbiting wrap in a radial direction, and spaced apart by predetermined intervals in a circumferential direction; and
a plurality of second guides provided on the orbiting end plate to be located radially outward from the orbiting wrap, spaced apart by predetermined intervals along the circumferential direction to be coupled to the plurality of first guides, respectively, so as to allow an orbiting motion of the orbiting scroll together with the plurality of second guides, wherein each of the plurality of second guides includes a guide forming portion that extends from an outer circumferential surface of the orbiting end plate to protrude in the radial direction, and a guide accommodating portion formed through the guide forming portion in the axial direction to form an anti-rotation surface together with an outer circumferential surface of a respective first guide of the plurality of first guides, and wherein the guide forming portion is formed such that a circumferential length of an inner end portion connected to the outer circumferential surface of the orbiting end plate is shorter than a circumferential length of an outer end portion forming an outer circumferential surface of the guide forming portion.

2. The compressor of claim 1 , wherein the plurality of first guides is inserted through the plurality of second guides in the axial direction.

3. The compressor of claim 2 , wherein each of the plurality of second guides is provided with the guide accommodating portion formed on an inner circumferential surface thereof to surround the respective first guide of the plurality of first guides, and an inner diameter of the guide accommodating portion is greater than an outer diameter of the respective first guide by twice an orbiting radius of the orbiting scroll.

4. The compressor of claim 3 , wherein the guide accommodating portion is formed in an arcuate shape.

5. The compressor of claim 4 , wherein a center angle of the guide accommodating portion satisfies {α≥(3×360°)/the number of second guides (n), n=3 to 5}, wherein the center angle formed by connecting a center of the guide accommodating portion to both ends of the guide accommodating portion in the circumferential direction is α.

6. The compressor of claim 3 , wherein the guide accommodating portion is formed in a circular shape.

7. The compressor of claim 1 , wherein each of the plurality of first guides comprises:
a pin slidably inserted through the non-orbiting end plate in the axial direction to be coupled to the frame; and
a bushing inserted into an outer circumferential surface of the pin to be disposed between the frame and the non-orbiting scroll.

8. The compressor of claim 7 , wherein both ends of the bushing is disposed to face one surface of the frame and one surface of the non-orbiting scroll, respectively, to support the frame and the non-orbiting scroll.

9. The compressor of claim 1 , wherein each of the first guides comprises a pin slidably inserted through the non-orbiting end plate in the axial direction to be coupled to the frame, and wherein the pin comprises:
a pin portion;
a head portion provided at a first end of the pin portion to be axially supported by the non-orbiting end plate;
a first coupling screw portion provided at a second end of the pin portion to be coupled to the frame; and
a first stepped portion provided on the pin portion between the head portion and the first coupling screw portion to be supported by the frame in the axial direction.

10. The compressor of claim 9 , wherein the frame is provided with a second coupling screw portion to which the first coupling screw portion of the pin is coupled, and the second coupling screw portion is provided with a second step portion formed in one side thereof to axially support the first stepped portion of the pin inserted into the second coupling screw portion.

11. The compressor of claim 1 , wherein a back pressure chamber assembly having a back pressure chamber is coupled to an upper surface of the non-orbiting scroll, and wherein the non-orbiting scroll and the back pressure chamber assembly are provided with back pressure holes through which the back pressure chamber and the compression chamber communicate with each other.

12. The compressor of claim 1 , wherein a back pressure chamber is formed between the frame and the orbiting scroll in a manner that a plurality of sealing members is spaced apart by a predetermined interval in the radial direction, and wherein the orbiting scroll is provided with a back pressure hole through which the compression chamber and the back pressure chamber communicate with each other.

13. The compressor of claim 12 , wherein an inner diameter of a sealing member located at an outer side among the plurality of sealing members is equal to or greater than an inner diameter of an outermost side of the non-orbiting wrap.

14. The compressor of claim 1 , wherein the circumferential length of the inner end portion of the guide forming portion is equal to or longer than a half of the circumferential length of the outer end portion of the guide forming portion.

15. A scroll compressor, comprising:
a non-orbiting scroll having a non-orbiting wrap;
an orbiting scroll having an orbiting wrap engaged with the non-orbiting wrap to form a compression chamber, the orbiting scroll performing an orbiting motion;
a plurality of guides provided at the non-orbiting scroll; and
a plurality of guide accommodating portions provided in an outer circumferential surface of the orbiting scroll and accommodating the plurality of guides, respectively so that the orbiting scroll performs the orbiting motion with respect to the plurality of guides, wherein each of the plurality of guide accommodating portions includes a guide forming portion that extends from the outer circumferential surface of the orbiting scroll to protrude in a radial direction, and a recess recessed from an outer circumferential surface of the guide forming portion in the radial direction and formed through the guide forming portion in an axial direction to form an anti-rotation surface together with an outer circumferential surface of a respective guide of the plurality of guides, and wherein each of the plurality of guide accommodating portions is formed such that a distance between both ends of the guide accommodating portion in a circumferential direction is less than an inner diameter of the guide accommodating portion.

16. The compressor of claim 15 , wherein the plurality of guides is located outward from the non-orbiting wrap in the radial direction, and wherein the plurality of guide accommodating portions is located outward from the orbiting wrap in the radial direction.

17. The compressor of claim 16 , wherein the plurality of guides is spaced apart by predetermined intervals in the circumferential direction, and the plurality of guide accommodating portions is spaced

Assignees

• Lg Electronics Inc

Inventors

• Jo Changeol
• Kim Suchul
• Sohn Donghyun

Classifications

• F04C29/0057

  for eccentric movement · CPC title

• F04C27/005

  Axial sealings for working fluid · CPC title

• F04C18/0215 Primary

  where only one member is moving · CPC title

• F04C29/0021

  Systems for the equilibration of forces acting on the pump (interstice adjustment other than by fluid pressure F01C21/102) · CPC title

• F01C17/063

  with only rolling movement · CPC title