Scroll compressor

Patent metadata

Field	Value
Publication number	US-11549511-B2
Application number	US-202016953635-A
Country	US
Kind code	B2
Filing date	Nov 20, 2020
Priority date	Jun 17, 2020
Publication date	Jan 10, 2023
Grant date	Jan 10, 2023

Abstract

A scroll compressor may include a casing having a low pressure portion and a high pressure portion, a refrigerant suction pipe that communicates with the low pressure portion and a refrigerant discharge pipe that communicates with the high pressure portion, a drive motor installed inside of the low pressure portion, an orbiting scroll coupled to the drive motor to perform an orbiting motion, a non-orbiting scroll engaged with the orbiting scroll to form a compression chamber, and a refrigerant guide provided on the non-orbiting scroll to guide a refrigerant suctioned into the low pressure portion to be suctioned into the compression chamber, whereby an increase in specific volume of refrigerant suctioned into the compression chamber may be suppressed, and thus, an amount of refrigerant suctioned into the compression chamber may increase, thereby improving efficiency of the compressor.

First claim

What is claimed is:

1. A scroll compressor, comprising:
a casing;
a high/low pressure separation plate configured to separate an inner space of the casing into a low pressure portion and a high pressure portion;
a refrigerant suction pipe that communicates with the low pressure portion;
a refrigerant discharge pipe that communicates with the high pressure portion;
an orbiting scroll provided in the low pressure portion of the casing to perform an orbiting motion, and including an orbiting end plate, and an orbiting wrap that extends from the orbiting end plate, wherein the orbiting end plate is disposed adjacent to the refrigerant suction pipe;
a non-orbiting scroll provided on one side of the orbiting scroll, and including a non-orbiting end plate, a non-orbiting wrap that extends from the non-orbiting end plate and engaged with the orbiting wrap to form a compression chamber, and a non-orbiting side wall that extends from an edge of the non-orbiting end plate in an axial direction, the non-orbiting wrap having an end spaced apart from the refrigerant suction pipe;
a suction guide protrusion that extends from the non-orbiting side wall of the non-orbiting scroll toward an inner circumferential surface of the casing;
a suction guide passage formed by an inside of the suction guide protrusion such that the low pressure portion and the compression chamber communicate with each other, wherein a back pressure chamber assembly is provided on one side surface of the non-orbiting scroll in the axial direction, and wherein the non-orbiting scroll moves up and down in the axial direction by the back pressure chamber assembly during operation; and
wherein the suction guide passage overlaps in a circumferential direction at least a portion of the refrigerant suction pipe when viewed in the axial direction, and a maximum interval between an inner circumferential surface of the suction guide passage and an outer circumferential surface of the orbiting scroll is larger than or equal to an orbiting radius of the orbiting scroll.

2. The scroll compressor of claim 1 , wherein the suction guide protrusion is disposed adjacent to the inner circumferential surface of the casing or an inner circumferential surface of the high/low pressure separation plate and spaced apart therefrom by a predetermined interval.

3. The scroll compressor of claim 1 , wherein a first end of the suction guide passage is open in a direction toward the refrigerant suction pipe, wherein a second end of the suction guide passage is open in a direction toward the compression chamber, wherein a portion between the first and second ends of the suction guide passage in a direction toward the high/low pressure separation plate is covered, and wherein an outer circumferential surface of a refrigerant guide facing the inner circumferential surface of the casing is spaced apart from the inner circumferential surface of the casing and an inner circumferential surface of the high/low pressure separation plate by a predetermined distance in a radial direction.

4. The scroll compressor of claim 1 , wherein a depth of the suction guide passage in the axial direction is smaller than or equal to a wrap height of the non-orbiting wrap.

5. The scroll compressor of claim 1 , wherein the suction guide passage comprises a passage inlet open toward the low pressure portion, a passage connection portion that extends from the passage inlet toward the compression chamber, and a passage outlet that communicates the passage connection portion with the compression chamber, and wherein a cross-section of the passage inlet and a cross-section of the passage outlet are orthogonal to each other.

6. The scroll compressor of claim 5 , wherein the passage inlet has an arcuate cross-sectional shape that extends along a circumferential direction, and is provided with a cut open end on an inner circumferential side thereof.

7. The scroll compressor of claim 5 , wherein the passage connection portion has an arcuate cross-sectional shape that extends from the passage inlet toward the high/low pressure separation plate, and wherein the passage connection portion is formed such that a surface thereof facing the high/low pressure separation plate has a bent cross-sectional shape.

8. The scroll compressor of claim 5 , wherein the passage connection portion has an arcuate cross-sectional shape that extends from the passage inlet toward the high/low pressure separation plate, and wherein the passage connection portion is formed such that a surface thereof facing the high/low pressure separation plate has a cross-sectional shape that is inclined or curved with respect to the axial direction.

9. The scroll compressor of claim 5 , wherein the passage outlet extends from an open end of the passage inlet toward the high/low pressure separation plate, and wherein a connection surface that connects the passage outlet and the compression chamber to each other is rounded.

10. The scroll compressor of claim 1 , wherein the non-orbiting scroll is provided with at least one guide protrusion that radially extends along the circumferential direction, and wherein the suction guide protrusion is recessed into the at least one guide protrusion by a predetermined depth in a direction toward the high/low pressure separation plate.

11. The scroll compressor of claim 10 , wherein the at least one guide protrusion comprises a plurality of guide protrusions provided spaced apart from one another by predetermined intervals along the circumferential direction of the non-orbiting scroll, and wherein the suction guide protrusion is formed between the plurality of guide protrusions adjacent to each other.

12. The scroll compressor of claim 11 , wherein the plurality of guide protrusions is provided with guide insertion holes formed therethrough in the axial direction, respectively, and wherein the suction guide protrusion is formed such that at least a portion thereof is located on a virtual circle connecting centers of the plurality of guide insertion holes adjacent to one another.

13. The scroll compressor of claim 1 , wherein the refrigerant suction pipe is formed such that an outlet end thereof is closer to an inner circumferential surface of the casing than an inlet of the suction guide passage.

14. The scroll compressor of claim 13 , wherein the refrigerant suction pipe is configured such that the outlet end is inclined toward the inlet of the suction guide passage.

15. A scroll compressor, comprising:
a casing having a low pressure portion and a high pressure portion;
a refrigerant suction pipe that communicates with the low pressure portion and a refrigerant discharge pipe that communicates with the high pressure portion;
a drive motor installed inside of the low pressure portion;
an orbiting scroll coupled to the drive motor to perform an orbiting motion;
a non-orbiting scroll engaged with the orbiting scroll to form a compression chamber; and
a refrigerant guide that extends radially outward from the non-orbiting scroll, the refrigerant guide directing a refrigerant suctioned into the low pressure portion into the compression chamber, wherein the refrigerant guide forms a suction guide passage, and wherein the suction guide passage overlaps in a circumferential direction at least a portion of the refrigerant suction pipe when viewed in the axial direction, and a maximum interval between an inner circumferential surface of the suction guide passage and an outer circumferential surface of the orbiting scroll is larger than or equal to an orbiting radius of the orbiting scroll.

16. The scroll compressor of

Assignees

• Lg Electronics Inc

Inventors

• Jo Changeol

Classifications

• F04C2240/20

  Rotors · CPC title

• F04C18/0253

  Details concerning the base · CPC title

• F04C2240/40

  Electric motor · CPC title

• F04C18/0215 Primary

  where only one member is moving · CPC title

• F04C29/12 Primary

  Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet · CPC title