Micro-valve

Patent metadata

Field	Value
Publication number	US-11242943-B2
Application number	US-202016925007-A
Country	US
Kind code	B2
Filing date	Jul 9, 2020
Priority date	Sep 24, 2019
Publication date	Feb 8, 2022
Grant date	Feb 8, 2022

Abstract

Provided is a micro-valve having a laminate structure capable of improving sealing performance when a foreign substance is mixed. The micro-valve 10 has a laminate structure and includes a base layer 20 and a diaphragm layer 30. The base layer is formed with an inlet port 23 for introducing a gas into the micro-valve and an outlet port for allowing the gas to flow outside. The diaphragm layer is arranged to face the base layer. The diaphragm layer switches the flowing and blocking of the gas from the inlet port to the outlet port by elastic deformation thereof. The diaphragm layer has a configuration in which a plurality of deformation regions 33 and a plurality of rigid body regions 34 are alternately formed, the deformation region being elastically deformable in accordance with an inflow of a pneumatic fluid into the micro-valve. The diaphragm layer closes at least one of the inlet port and the outlet port by elastic deformation of at least a part of the plurality of deformation regions.

First claim

The invention claimed is:

1. A micro-valve having a laminate structure, comprising:
a base layer having an upper surface, an inlet port for introducing a gas into the micro-valve, and an outlet port for allowing the gas introduced from the inlet port to flow outside, the upper surface having openings corresponding to the inlet and outlet ports, respectively; and
a diaphragm layer arranged to face the base layer and configured to elastically deform to switch between flowing and blocking of the gas from the inlet port to the outlet port
wherein the diaphragm layer has a sealing surface, deformation regions, and rigid body regions, the deformation regions and rigid body regions being arranged next to one another on a side of the diaphragm layer opposite to the sealing surface, the deformation regions each being elastically deformable in accordance with an inflow of a pneumatic fluid into the micro-valve, and
wherein the diaphragm layer is configured to partly or wholly deform in its deformation regions, causing the sealing surface to abut against the upper surface of the base layer, which closes the inlet port and/or the outlet port.

2. The micro-valve as recited in claim 1 ,
wherein the diaphragm layer is formed of a single material, and a thickness of the deformation regions in a lamination direction is smaller than a thickness of the rigid body regions in the lamination direction.

3. The micro-valve as recited in claim 1 ,
wherein in a plan view of the diaphragm layer viewed in a lamination direction, a part of the rigid body regions and the deformation regions each have an annular shape, and the deformation regions and the rigid body regions are alternately formed concentrically.

4. The micro-valve as recited in claim 1 , further comprising:
a cover layer,
wherein the diaphragm layer is arranged between the cover layer and the base layer.

5. The micro-valve as recited in claim 4 ,
wherein the pneumatic fluid flows into between the diaphragm layer and the cover layer, and the diaphragm layer is pressed against the base layer to close at least one of the inlet port and the outlet port.

6. The micro-valve as recited in claim 1 ,
wherein the diaphragm layer is formed using silicon, glass, or PEEK (Poly Ether Ether Ketone) resin.

7. A micro-valve having a laminate structure, comprising:
a base layer having an upper surface, an inlet port for introducing a gas into the micro-valve, and an outlet port for allowing the gas introduced from the inlet port to flow outside, the upper surface having openings corresponding to the inlet and outlet ports, respectively; and
a diaphragm layer arranged to face the base layer and configured to elastically deform to switch between flowing and blocking of the gas from the inlet port to the outlet port,
wherein the diaphragm layer includes a sealing surface, a deformation region, and a rigid body region, the deformation region and the rigid body region being arranged on a side of the diaphragm layer opposite to the sealing surface, the deformation region being configured to be elastically deformed as a pneumatic fluid flows into the micro-valve, and the rigid body region being configured to limit a deformation amount of the deformation region, and
wherein at least one of the inlet port and the outlet port is configured to be closed by causing the sealing surface of the elastically deformed deformation region to abut against the upper surface of the base layer.

8. The micro-valve according to claim 1 ,
wherein the base layer has a supply port for introducing the pneumatic fluid into the micro-valve.

9. The micro-valve according to claim 7 ,
wherein the base layer has a supply port for introducing the pneumatic fluid into the micro-valve.

10. A micro-valve having a laminate structure, comprising:
a base layer having an upper surface, an inlet port for introducing a gas into the micro-valve, and an outlet port for allowing the gas introduced from the inlet port to flow outside, the upper surface having openings corresponding to the inlet and outlet ports, respectively; and
a diaphragm layer arranged to face the base layer and configured to elastically deform to switch between flowing and blocking of the gas from the inlet port to the outlet port,
wherein the diaphragm layer has a sealing surface, deformation regions, and rigid body regions, the deformation regions and rigid body regions being alternately and concentrically arranged on a side of the diaphragm layer opposite to the sealing surface, the deformation regions each being elastically deformable in accordance with an inflow of a pneumatic fluid into the micro-valve.

Assignees

• Shimadzu Corp

Inventors

• Lu Wenjian
• Shibamoto Shigeaki
• Takahashi Kazunori
• Sato Ayaka

Classifications

• F16K99/0055

  actuated by fluids · CPC title

• F16K27/0236

  Diaphragm cut-off apparatus · CPC title

• F16K99/0005 Primary

  Lift valves · CPC title

• F16K99/0059

  actuated by a pilot fluid · CPC title

• F16K99/0034

  Operating means specially adapted for microvalves · CPC title