Fluid compressor having discharge port and valve

Patent metadata

Field	Value
Publication number	US-11268510-B2
Application number	US-201916526421-A
Country	US
Kind code	B2
Filing date	Jul 30, 2019
Priority date	Jul 30, 2018
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

A fluid compressor is provided. The fluid compressor includes a case including an inlet configured to introduce fluid to be compressed, a compression unit including a compression chamber configured to compress the fluid introduced into the case, and a discharge port configured to discharge the compressed fluid to the outside of the compression chamber, a motor configured to drive the compression unit, and a valve configured to open and close the discharge port. The valve includes a fastening portion coupled to the compression unit to be spaced a first distance from the discharge port.

First claim

What is claimed is:

1. A fluid compressor comprising:
a case comprising an inlet configured to receive and direct fluid to an inside of the case;
a compression unit that defines a compression chamber configured to compress the fluid in the case and a discharge port configured to discharge compressed fluid to an outside of the compression chamber;
a motor disposed inside the case and configured to drive the compression unit; and
a valve coupled to the compression unit and configured to open and close at least a portion of the discharge port,
wherein the valve comprises a fastening portion coupled to the compression unit and spaced apart from the discharge port by a first distance, the fastening portion having a coupling portion coupled to a surface of the compression unit,
wherein the fluid compressor further comprises:
a retainer configured to limit a displacement of the valve based on the valve opening the discharge port, the retainer comprising a fixing portion coupled to the compression unit and spaced apart from the valve by a second distance,
a first spacing member disposed between the coupling portion and the surface of the compression unit and configured to maintain the first distance between the valve and the compression unit, and
a second spacing member disposed between the fastening portion of the valve and the fixing portion of the retainer and configured to maintain the second distance between the valve and the retainer, and

wherein the valve has a lower surface that contacts the first spacing member and an upper surface that contacts the second spacing member.

2. The fluid compressor according to claim 1 , wherein the valve has a free end that extends from the coupling portion toward the discharge port to thereby overlap with the discharge port.

3. The fluid compressor according to claim 1 , wherein the retainer extends in a direction parallel to the valve.

4. The fluid compressor according to claim 3 , wherein the retainer overlaps with the valve over an entire length of the retainer.

5. The fluid compressor according to claim 3 , wherein a length of the retainer is less than a length of the valve.

6. The fluid compressor according to claim 3 , wherein the fastening portion and the fixing portion are coupled to the surface of the compression unit by a fastening member that penetrates an end portion of each of the valve and the retainer, the end portion being disposed away from the discharge port.

7. The fluid compressor according to claim 3 , wherein the retainer comprises a first end portion that has a free-end disposed vertically above a top surface of the valve and a second end portion that is coupled to the compression unit.

8. The fluid compressor according to claim 3 , wherein the retainer comprises a plurality of plates that are stacked.

9. The fluid compressor according to claim 8 , wherein lengths of the plurality of plates toward the discharge port decrease as distances between the compression unit and the plurality of plates increase.

10. The fluid compressor according to claim 9 , wherein the plurality of plates comprise fixed ends that overlap with one another and free ends that are spaced apart from one another.

11. The fluid compressor according to claim 8 , wherein stiffnesses of the plurality of plates are different from one another.

12. The fluid compressor according to claim 11 , wherein the stiffnesses of the plurality of plates increase as distances between the valve and the plurality of plates increase.

13. The fluid compressor according to claim 8 , wherein the plurality of plates comprise:
a first plate that is disposed vertically above the upper surface of the valve and that extends toward the discharge port; and
a second plate that is disposed vertically above the first plate and that extends toward the discharge port, and
wherein a length of the second plate toward the discharge port is less than a length of the first plate toward the discharge port.

14. The fluid compressor according to claim 13 , wherein a first stiffness of the first plate is less than a second stiffness of the second plate.

15. The fluid compressor according to claim 14 , wherein a sum of the first stiffness and the second stiffness is greater than or equal to a stiffness of the retainer.

16. The fluid compressor according to claim 13 , wherein an upper surface of the first plate contacts a lower surface of the second plate.

17. The fluid compressor according to claim 1 , wherein the compression unit comprises:
a fixed scroll comprising a first plate part and a first scroll that protrudes from a surface of the first plate part; and
an orbiting scroll configured to be driven by the motor, the orbiting scroll comprising a second plate part and a second scroll that protrudes from a surface of the second plate part and that is meshed with the first scroll, and
wherein the discharge port is defined in the first plate part.

18. The fluid compressor according to claim 1 , wherein a length of the first spacing member and a length of the second spacing member are less than a length of the valve.

19. The fluid compressor according to claim 18 , wherein a length of the retainer is greater than the length of the first spacing member and the length of the second spacing member.

20. The fluid compressor according to claim 18 , wherein the length of the first spacing member and the length of the second spacing member are less than a distance between the coupling portion and an inner end of the discharge port, and
wherein the length of the valve is greater than a distance between the coupling portion and an outer end of the discharge port.

Assignees

• Lg Electronics Inc

Inventors

• Lee Jaeha
• Kim Jinho
• Ahn Sungyong
• Choi Yoonsung

Classifications

• F04B53/1085

  having means for limiting the opening height (F04B53/101 and F04B53/1035 take precedence) · CPC title

• F04C2270/13

  Noise · CPC title

• F04C29/06

  Silencing (gas-flow silencers or exhaust apparatus for machines or engines in general F01N) · CPC title

• F04C18/0269

  Details concerning the involute wraps · CPC title

• F04C18/0215 Primary

  where only one member is moving · CPC title