Rotary compressor having fluid passage between sliding vane and vane slot

Patent metadata

Field	Value
Publication number	US-10473102-B2
Application number	US-201715417486-A
Country	US
Kind code	B2
Filing date	Jan 27, 2017
Priority date	Feb 2, 2016
Publication date	Nov 12, 2019
Grant date	Nov 12, 2019

Abstract

A compressor is provided in which an outer circumferential side cross-sectional area of a vane slot is formed smaller than an inner circumferential side cross-sectional area thereof to decrease an area receiving a force in a roller direction by a vane to reduce a contact force between the roller and the vane, and a gas accommodation portion selectively forming a suction pressure and an intermediate pressure is formed between the vane and the vane slot to control the contact force. A contact surface of the vane facing the roller is formed at a side of a compression chamber to reduce the contact force, and a space forming a discharge pressure is formed at at least either one side of a side surface of the vane and a cylinder to decrease a side directional reaction force applied to the vane, thereby reducing a friction between the vane and the cylinder.

First claim

What is claimed is:

1. A compressor, comprising:
a casing;
a cylinder provided in an inner space of the casing;
a roller configured to concentrically rotate with the cylinder within the cylinder to form at least two or more compression spaces in the cylinder; and
two or more vanes configured to face an outer circumferential surface of the roller to be slidably coupled to the cylinder to partition the two or more compression spaces into a suction chamber and a compression chamber, respectively, wherein a space in which a volume thereof varies according to a movement of the vane is formed between one side surface of the vane and the cylinder corresponding thereto, wherein a slot side step stepped by a predetermined length in an outer circumferential side from an inner circumferential end of the vane slot is formed on a side surface of the vane slot, and a vane side step stepped in an opposite direction to the slot side step is formed on a side surface of the vane corresponding to the slot side step, wherein a vane side communication groove is formed on the side surface of the vane, and a slot side communication groove is formed in the cylinder to selectively provide communication between the vane side communication groove and the space according to the movement of the vane, wherein a vane side sealing portion that faces the vane slot to secure a sealing area is formed at a front side of the vane side step, and the vane side communication groove is formed on the vane side sealing portion, and wherein the slot side communication groove Us formed within the slot side step.

2. The compressor of claim 1 , wherein the space communicates with the suction chamber or with the inner space of the casing.

3. The compressor of claim 1 , wherein the vane side communication groove is formed at at least either one edge of both a top and a bottom edge of the vane side sealing portion, and wherein the slot side communication groove is formed at at least either one edge of both a top and a bottom edge of the slot side step.

4. A compressor, comprising:
a drive motor;
a rotational shaft configured to transfer a rational force of the drive motor;
a cylinder provided at one side of the drive motor;
a roller provided on the rotational shaft to rotate therewith, and allow at least two or more portions of an outer circumferential surface thereof to face an inner circumferential surface of the cylinder to form at least two compression spaces in the cylinder; and
at least two or more vanes configured to face the outer circumferential surface of the roller to partition the two or more compression spaces into a suction chamber and a compression chamber, respectively, wherein at least two or more vane slots having an inner surface are formed in the cylinder to face both side surfaces of the vane, wherein a space recessed by a predetermined depth is formed between the vane slot and a side surface of the vane corresponding thereto, wherein a slot side step stepped by a predetermined length in an outer circumferential side from an inner circumferential end of the vane slot is from on a side surface of the vane slot, and a vane side step stepped in and opposite direction to the slot side step in formed on the side surface of the vane corresponding to the slot side step, and wherein the space is located within a radial range of the vane slot and a volume of the space varies according to a movement of the vane.

5. The compressor of claim 4 , wherein the space in which the volume thereof varies according to the movement of the vane is formed between the slot side step and the vane side step.

6. The compressor of claim 5 , wherein a communication passage by which the space and the suction chamber communicate is formed in the cylinder.

7. The compressor of claim 5 , wherein a communication passage by which the space and the suction chamber communicate is formed in the cylinder and the vane, respectively.

8. The compressor of claim 7 , wherein the communication passage is configured to block communication between the suction chamber and the space at a portion having a lowest linear velocity, but provide communication between the suction chamber and the space at a portion having a highest linear velocity between the roller and the vane.

9. The compressor of claim 7 , wherein the communication passage comprises:
a vane side communication groove formed on a side surface of the vane; and
a slot side communication groove formed in the cylinder to selectively communicate between the vane side communication groove and the space according to the movement of the vane.

10. The compressor of claim 9 , wherein a vane side sealing portion that faces the vane slot to secure a sealing area is formed at a front side of the vane side step, and the vane side communication groove is formed on the vane side sealing portion, and wherein the slot side communication groove is formed within the slot side step.

11. The compressor of claim 10 , wherein the vane side communication groove is formed at at least either one edge of both a top and a bottom edge of the vane side sealing portion, and wherein the slot side communication groove is formed at at least either one edge of both a top and a bottom edge of the slot side step.

12. The compressor of claim 4 , wherein the space having a predetermined volume is formed on the side surface of the vane or a side surface of the cylinder corresponding thereto.

13. The compressor of claim 4 , wherein the vane comprises:
a vane body; and
a vane protrusion convexly formed at a front end of the vane body, and wherein a center of a curvature radius of the vane protrusion is eccentrically formed with respect to a length directional center line of the vane body.

14. The compressor of claim 4 , wherein an outer circumferential cross-sectional area of the vane slot is formed to be smaller than an inner circumferential cross-sectional area thereof.

15. The compressor of claim 4 , wherein an outer circumferential cross-sectional area of the vane is formed to be smaller than an inner circumferential cross-sectional area thereof.

16. The compressor of claim 4 , wherein the space is blocked from the suction chamber at a time point at which a protrusion amount of the vane is highest to form an intermediate pressure chamber.

17. The compressor of claim 4 , wherein an outer circumferential end portion of the space communicates with an inner space of the casing in a state in which the vane protrudes to a maximum in a compression space.

Assignees

• Lg Electronics Inc

Inventors

• Lee Yunhi
• Kang Seoungmin
• Shin Jinung
• Moon Seokhwan
• Lee Byeongchul

Classifications

• F04C2240/10

  Stators · CPC title

• F04C18/3566

  the inner and outer member being in contact along more than line or surface · CPC title

• F01C21/0827

  by mechanical means · CPC title

• F01C21/0809 Primary

  Construction of vanes or vane holders · CPC title

• F04C23/008

  Hermetic pumps · CPC title