Valve structure, nonlubricated linear compressor, and cryocooler

Patent metadata

Field	Value
Publication number	US-10480665-B2
Application number	US-201615298595-A
Country	US
Kind code	B2
Filing date	Oct 20, 2016
Priority date	Oct 23, 2015
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

A valve structure includes: a valve seat part furnished with a valve hole portion having a valve hole connecting a first gas chamber to a second gas chamber, and a valve-body supporting wall part laterally extending from the valve hole portion; an elastic valve-body member furnished with a first elastic platelike section disposed paralleling the valve hole portion, and a second elastic platelike section extending from the first elastic platelike section, wherein the first elastic platelike section is elastically deformable against the second elastic platelike section under pressure differential between the first gas chamber and the second gas chamber such as to open the valve hole; and an elastic pressing member arranged paralleling the second elastic platelike section such as to elastically deform together with the elastic valve-body member, and being of planar form configured so as to expose the first elastic platelike section.

First claim

What is claimed is:

1. A valved nonlubricated linear compressor, comprising
a compressor container,
a cylinder housed in the compressor container,
a movable piston accommodated in the cylinder, the movable piston partitioning the compressor container into a high-pressure chamber and a low-pressure chamber, wherein
the cylinder partitions the high-pressure chamber into a pressurization chamber formed between the movable piston and the cylinder, and a discharge chamber formed inside the cylinder,
a discharge pipe is connected to the discharge chamber, and a suction pipe is connected to the low-pressure chamber,
the movable piston comprises an intake valve for supplying gas from the low-pressure chamber to the pressurization chamber,
the cylinder comprises a discharge valve for discharging the gas from the pressurization chamber to the discharge chamber, and
at least one of the intake valve and the discharge valve is constituted by a valve structure comprising:
a fixing member;
a valve seat part including a valve hole portion positioned on a side of the valve seat part with respect to the fixing member, the valve hole portion having a valve hole either connecting the high-pressure chamber to the low-pressure chamber, or connecting the discharge chamber to the pressurization chamber, and a valve-body supporting wall part positioned on an opposite side of the valve seat part with respect to the fixing member, the valve-body supporting wall part extending laterally from the valve hole portion, wherein no valve hole is present in the valve-body supporting wall part;
an elastic valve-body member furnished with
a valve-body fulcrum portion fixed to the valve seat part with the fixing member,
a first elastic platelike section separated from the valve-body fulcrum portion by a slit and disposed paralleling the valve hole portion so as to cover the valve hole, and
a second elastic platelike section extending from the valve-body fulcrum portion opposite-ward with respect to the slit and paralleling the valve-body supporting wall part, wherein
the first and second elastic platelike sections are continuous to each other,
the first elastic platelike section is elastically deformable relative to the second elastic platelike section under pressure differential either between the high-pressure chamber and the low-pressure chamber, or between the discharge chamber and the pressurization chamber, so as to uncover the valve hole; and

a fan-shaped elastic pressing member furnished with
a pressing-member fulcrum portion fixed to the valve seat part with the fixing member, and
a pressing-member elastic platelike section extending from the pressing-member fulcrum portion opposite-ward with respect to the slit and paralleling the second elastic platelike section so as to elastically deform together with the elastic valve-body member, the fan-shaped elastic pressing member being of planar form configured so as to expose the first elastic platelike section; wherein

the pressing-member elastic platelike section and the second elastic platelike section of the elastic valve-body member are fan-shaped to match each other in plan view form.

2. The valved nonlubricated linear compressor according to claim 1 , wherein the elastic valve-body member is covered with a fluoropolymer layer.

3. The valved nonlubricated linear compressor according to claim 1 , further comprising:
a fluoropolymer member disposed between the valve seat part and the elastic valve-body member, and arranged paralleling the valve seat part.

4. The valved nonlubricated linear compressor according to claim 3 , wherein the fluoropolymer member has an opening in a location corresponding to the valve hole.

5. The valved nonlubricated linear compressor according to claim 1 , wherein the elastic valve-body member includes a valve-body connecting portion connecting the valve-body fulcrum portion to the second elastic platelike section opposite-ward with respect to the slit, and
wherein the fan-shaped elastic pressing member includes a pressing-member connecting portion connecting the pressing-member fulcrum portion to the pressing-member elastic platelike section opposite-ward with respect to the slit.

6. The valved nonlubricated linear compressor according to claim 5 , wherein the pressing-member elastic platelike portion, the pressing-member fulcrum portion, and the pressing-member connecting portion, are of planar form identical to the second elastic platelike section, the valve-body fulcrum portion, and the valve-body connecting portion, respectively.

7. A cryocooler comprising the nonlubricated linear compressor according to claim 6 .

8. The valved nonlubricated linear compressor according to claim 1 , wherein the movable piston comprises a piston tip hollow portion having a first piston recess forming part of the pressurization chamber.

9. The valved nonlubricated linear compressor according to claim 1 , wherein the movable piston comprises a piston main body hollow portion having a second piston recess forming part of the low-pressure chamber.

10. The valved nonlubricated linear compressor according to claim 1 , wherein:
the movable piston comprises a piston tip hollow portion having a first piston recess, a piston main body hollow portion having a second piston recess and a piston partition wall connecting the piston tip hollow portion and the piston main body hollow portion; and
the intake valve is housed in the first piston recess.

11. The valved nonlubricated linear compressor according to claim 10 , wherein:
a piston communication hole is formed through the piston partition wall to communicate the first piston recess with the second piston recess; and
the intake valve is configured so as to open and close the piston communication hole by a pressure difference between the first piston recess and the second piston recess.

12. The valved nonlubricated linear compressor according to claim 11 , wherein:
the intake valve comprises the valve structure; and
the valve hole and the valve seat part respectively correspond to the piston communication hole and the piston partition wall.

13. The valved nonlubricated linear compressor according to claim 1 , wherein the cylinder comprises a cylinder base portion fixed to the compressor container and forming the discharge chamber, a cylinder main body portion forming the pressurization chamber between the movable piston and the cylinder main body portion, and a cylinder partition wall connecting the cylinder base portion and the cylinder main body portion.

14. The valved nonlubricated linear compressor according to claim 13 , wherein:
a cylinder communication hole is formed through the cylinder partition wall to communicate the discharge chamber with the pressurization chamber; and
the discharge valve is accommodated in the discharge chamber and is configured so as to open and close the cylinder communication hole by a pressure difference between the discharge chamber and the pressurization chamber.

15. The valved nonlubricated linear compressor according to claim 14 , wherein:
the discharge valve comprises the valve structure; and
the valve hole and the valve seat part respectively correspond to the cylinder communication hole and the cylinder partition wall.

16. The valved nonlubricated linear compressor according to claim 1 , wherein the elastic valve-body member is circular-shaped,
wherein the slit and the first elastic platelike section are arc-shaped and fan-shaped, respectively, and have a center angle which is greater than 180°,
wherein the pressing-member elastic plate

Assignees

• Sumitomo Heavy Industries

Inventors

• Hiratsuka Yoshikatsu

Classifications

• F04B39/10 Primary

  Adaptations or arrangements of distribution members · CPC title

• F04B39/1086

  flat annular reed valves · CPC title

• F16K25/005

  Particular materials for seats or closure elements · CPC title

• F16K15/148 Primary

  the closure elements being fixed in their centre · CPC title

• F04B39/108

  circular reed valves · CPC title