Miniature gas control device

Patent metadata

Field	Value
Publication number	US-10859077-B2
Application number	US-201816043540-A
Country	US
Kind code	B2
Filing date	Jul 24, 2018
Priority date	Aug 21, 2017
Publication date	Dec 8, 2020
Grant date	Dec 8, 2020

Abstract

A miniature gas control device is disclosed and includes a miniature gas transportation device and a miniature valve device. The miniature gas transportation device includes a protective film, a gas inlet plate, a resonance plate and a piezoelectric actuator stack sequentially. The miniature valve device includes a gas collecting plate, a valve film and a gas outlet plate stacked sequentially. By driving the piezoelectric actuator of the miniature gas transportation device, the gas flows into the miniature gas transportation device from the gas inlet plate, then the gas flows into the miniature valve device through the resonance plate, and the valve opening of the valve film is selectively opened or closed in response to a direction of the gas unidirectionally flowing among the perforations and chambers of the gas collection plate and the gas outlet plate, so as to perform a pressurizing operation and a pressure-releasing operation selectively.

First claim

What is claimed is:

1. A miniature gas control device, comprising:
a miniature gas transportation device comprising:
at least one protective film having a waterproof and dustproof film structure allowing gas to pass therethrough;
a gas inlet plate comprising at least one inlet, wherein the protective film is attached on a top surface of the gas inlet plate and completely covers the inlet of the gas inlet plate;
a resonance plate; and
a piezoelectric actuator;
wherein the at least one protective film, the gas inlet plate, the resonance plate and the piezoelectric actuator are stacked on each other sequentially to be positioned, and a gap is formed between the resonance plate and the piezoelectric actuator to define a first chamber, wherein when the piezoelectric actuator is enabled, the gas is fed into the miniature gas transportation device through the at least one inlet of the gas inlet plate, transferred through the resonance plate, introduced into the first chamber, and further transferred along a transportation direction; and

a miniature valve device comprising:
a gas collecting plate comprising at least two perforations and at least two chambers, wherein the gas collecting plate has a bottom plate and a sidewall protruding from peripheral edges of the bottom plate, wherein the miniature gas transportation device is located within an accommodation space formed by the sidewall and the bottom plate,
a valve film comprising a valve opening; and
a gas outlet plate comprising at least two perforations and at least two chambers;
wherein the gas collecting plate, the valve film and the gas outlet plate are stacked on each other sequentially to be positioned and a gas-collecting chamber is formed between the miniature gas transportation device and the miniature valve device, wherein after the gas is transferred from the miniature gas transportation device to the gas-collecting chamber along the transportation direction and fed into the miniature valve device, the gas flows unidirectionally in the at least two perforations and the at least two chambers of the gas collecting plate, and the at least two perforations and the at least two chambers of the gas outlet plate, wherein the valve opening of the valve film is opened or closed in response to the unidirectional flow of the gas, so that a pressurizing operation and a pressure-releasing operation is selectively performed.

2. The miniature gas control device according to claim 1 , wherein the protective film complies with Rating IP64 of International Protection Marking (IEC 60529).

3. The miniature gas control device according to claim 1 , wherein the protective film complies with Rating IP68 of International Protection Marking (IEC 60529).

4. The miniature gas control device according to claim 1 , wherein the gas inlet plate further comprises at least one convergence channel and a central cavity, the at least one convergence channel is formed corresponding to the at least one inlet to guide the gas fed therein to be converged to the central cavity, wherein the resonance plate comprises a central aperture formed corresponding to the central cavity of the gas inlet plate, wherein the piezoelectric actuator comprises a suspension plate and an outer frame connected with each other by at least one bracket, and a piezoelectric ceramic plate is attached on a surface of the suspension plate.

5. The miniature gas control device according to claim 1 , wherein the at least two perforations of the gas collecting plate are a first perforation and a second perforation, and the at least two chambers of the gas collecting plate are a first pressure-releasing chamber and a first outlet chamber, wherein the first perforation is in communication with the first pressure-releasing chamber, and the second perforation is in communication with the first outlet chamber.

6. The miniature gas control device according to claim 5 , wherein the at least two perforations of the gas outlet plate are a third perforation and a fourth perforation, and the at least two chambers of the gas outlet plate are a second pressure-releasing chamber and a second outlet chamber, wherein the gas outlet plate further comprises a communication channel in communication between the second pressure-releasing chamber and the second outlet chamber.

7. The miniature gas control device according to claim 6 , wherein the valve film is disposed between the gas collecting plate and the gas outlet plate and the valve opening of the valve film is arranged between the second perforation and the fourth perforation, wherein after the gas is transferred along the transportation direction from the miniature gas transportation device to the miniature valve device, the gas is introduced into the first pressure-releasing chamber through the first perforation and is introduced into the first outlet chamber through the second perforation, wherein the introduced gas flows into the fourth perforation through the valve opening to perform the pressurizing operation, wherein when the pressure of the pressurized gas is higher than the pressure of the introduced gas, the pressurized gas flows from the fourth perforation to the second outlet chamber to move the valve film, so that the valve opening of the valve film is abutting against the gas collecting plate to be closed, after which the pressurized gas is transferred from the second outlet chamber to the second pressure-releasing chamber through the communication channel while a part of the valve film in the second pressure-releasing chamber is moved, and the pressurized gas is discharged through the third perforation, so that the pressure-releasing operation is performed.

8. The miniature gas control device according to claim 1 , wherein the gas inlet plate of the miniature gas transportation device is made of stainless steel.

9. The miniature gas control device according to claim 1 , wherein the resonance plate of the miniature gas transportation device is made of copper.

10. The miniature gas control device according to claim 1 , wherein the miniature gas transportation device further comprises at least one insulation plate and a conducting plate, wherein the at least one insulation plate and the conducting plate are sequentially disposed under the piezoelectric actuator.

11. The miniature gas control device according to claim 5 , wherein the gas collecting chamber is in communication with the first perforation and the second perforation.

12. The miniature gas control device according to claim 5 , wherein the first pressure-releasing chamber and the first outlet chamber of the miniature valve device are concavely formed on a surface of the gas collecting plate, wherein the surface of the gas collecting plate is opposite to another surface of the gas collecting plate that is facing the gas-collecting chamber.

13. The miniature gas control device according to claim 6 , wherein the second pressure-releasing chamber and the second outlet chamber are formed on a surface of the gas outlet plate corresponding to the first pressure-releasing chamber and the first outlet chamber of the gas collecting plate, respectively.

14. A miniature gas control device, comprising:
at least one miniature gas transportation device comprising:
at least one protective film having a waterproof and dustproof film structure allowing gas to pass therethrough;
at least one gas inlet plate comprising at least one inlet, wherein the protective film is attached on a top surface of the gas inlet plate and completely covers the inlet of the gas inlet plate;
at least one resonance plate; and
at least one piezoelectric actuator;
wherein the at le

Assignees

• Microjet Technology Co Ltd

Inventors

• Mou Hao-Jan
• Liao Hung-Hsin
• Chen Shih-Chang
• Liao jia-yu
• Chen Shou-Hung
• Han Yung-Lung
• Lee Wei-Ming

Classifications

• F04B45/047 Primary

  Pumps having electric drive · CPC title

• F04B53/20

  Filtering · CPC title

• F04B35/04 Primary

  the means being electric · CPC title

• F04B39/10

  Adaptations or arrangements of distribution members · CPC title

• F04B43/046

  with piezoelectric drive · CPC title