Micro-gas pressure driving apparatus

Patent metadata

Field	Value
Publication number	US-9611843-B2
Application number	US-201414272272-A
Country	US
Kind code	B2
Filing date	May 7, 2014
Priority date	Jun 24, 2013
Publication date	Apr 4, 2017
Grant date	Apr 4, 2017

Abstract

A micro-gas pressure driving apparatus includes a miniature gas transportation module and a miniature valve module. The miniature gas transportation module includes a gas inlet plate, a fluid channel plate, a resonance membrane and a piezoelectric actuator. A first chamber is defined between the resonance membrane and the piezoelectric actuator. After the piezoelectric actuator is activated to feed a gas through the gas inlet plate, the gas is transferred to the first chamber through the fluid channel plate and the resonance membrane and then transferred downwardly. Consequently, a pressure gradient is generated to continuously push the gas. The miniature valve module includes a gas collecting plate, a valve membrane and a gas outlet plate. After the gas is transferred from the miniature gas transportation module to the gas-collecting chamber, the gas is transferred in one direction, so that a pressure-collecting operation or a pressure-releasing operation is selectively performed.

First claim

What is claimed is:

1. A micro-gas pressure driving apparatus, comprising:
a miniature gas transportation module comprising:
a gas inlet plate having at least one inlet, wherein a gas is fed into the miniature gas transportation module through the at least one inlet;
a fluid channel plate comprising at least one convergence channel and a central opening, wherein the at least one convergence channel is aligned with the at least one inlet of the gas inlet plate, wherein after the gas is fed into the at least one inlet, the gas is guided by the at least one convergence channel and converged to the central opening;
a resonance membrane having a central aperture corresponding to the central opening of the fluid channel plate; and
a piezoelectric actuator comprising a suspension plate, an outer frame and a piezoelectric ceramic plate, wherein the suspension plate and the outer frame are connected with each other through at least one bracket, and the piezoelectric ceramic plate is attached on a surface of the suspension plate,
wherein the gas inlet plate, the fluid channel plate, the resonance membrane and the piezoelectric actuator are stacked on each other sequentially, and the resonance membrane and the piezoelectric actuator are separated from each other by a gap, so that a first chamber is defined between the resonance membrane and the piezoelectric actuator, wherein when the piezoelectric actuator is activated to feed the gas into the miniature gas transportation module through the at least one inlet, sequentially converge the gas through the at least one convergence channel to the central opening of the fluid channel plate, transferred through the central aperture of the resonance membrane, introduced into the first chamber, transferred downwardly through a vacant space between the at least one bracket, the suspension plate and the outer frame, and exited from the miniature gas transportation module; and

a miniature valve module comprising:
a gas collecting plate comprising a first perforation, a second perforation, 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;
a valve membrane having a valve opening; and
a gas outlet plate comprising a third perforation corresponding to the first perforation of the gas collecting plate, a fourth perforation corresponding to the second perforation of the gas collecting plate, a second pressure-releasing chamber, a second outlet chamber and a communication channel, wherein the third perforation is in communication with the second pressure-releasing chamber, the fourth perforation is in communication with the second outlet chamber, and the communication channel is arranged between the second pressure-releasing chamber and the second outlet chamber,
wherein the gas collecting plate, the valve membrane and the gas outlet plate are stacked on each other sequentially, the valve membrane is arranged between the gas collecting plate and the gas outlet plate, and the valve opening of the valve membrane is arranged between the second perforation and the fourth perforation, wherein after the gas is downwardly transferred from the miniature gas transportation module to the miniature valve module, the gas is introduced into the first pressure-releasing chamber and the first outlet chamber through the first perforation and the second perforation, and the gas within the first outlet chamber is further transferred to the fourth perforation through the valve opening of the valve membrane, so that a pressure of the gas is collected, wherein if the collected pressure of the gas is higher than an ambient pressure and a pressure-releasing operation is performed, the gas is transferred from the fourth perforation to the second outlet chamber to move the valve membrane such that the valve opening of the valve membrane is contacted with and closed by the gas collecting plate, the gas is transferred from the second outlet chamber to the second pressure-releasing chamber through the communication channel, and the gas is exited from the third perforation.

2. The micro-gas pressure driving apparatus according to claim 1 , wherein the miniature gas transportation module further comprises an insulating plate and a conducting plate, wherein the insulating plate and the conducting plate are sequentially disposed under the piezoelectric actuator.

3. The micro-gas pressure driving apparatus according to claim 1 , wherein the fluid channel plate and the gas inlet plate of the miniature gas transportation module are integrally formed with each other.

4. The micro-gas pressure driving apparatus according to claim 1 , wherein the suspension plate of the piezoelectric actuator is a stepped structure including a lower portion and an upper portion, wherein a top surface of the upper portion is coplanar with a top surface of the outer frame, wherein the upper portion of the suspension plate or the top surface of the outer frame has a specified height with respect to the lower portion of the suspension plate or the top surface of the at least one bracket.

5. The micro-gas pressure driving apparatus according to claim 1 , wherein the surface of the suspension plate is a bottom surface of the suspension plate, a bottom surface of the outer frame and a bottom surface of the at least one bracket are coplanar with each other.

6. The micro-gas pressure driving apparatus according to claim 1 , wherein the miniature valve module further comprises a gas-collecting chamber, which is formed in a first surface of the gas collecting plate, wherein the gas-collecting chamber is in communication with the first perforation and the second perforation.

7. The micro-gas pressure driving apparatus according to claim 6 , wherein the first pressure-releasing chamber and the first outlet chamber of the miniature valve module are formed in a second surface of the gas collecting plate, wherein the second surface of the gas collecting plate is opposed to the first surface of the gas collecting plate.

8. The micro-gas pressure driving apparatus according to claim 1 , wherein the gas collecting plate of the miniature valve module further comprises a raised structure corresponding to the first outlet chamber, wherein the raised structure is aligned with the valve opening of the valve membrane for providing a pre-force to tightly close the valve opening.

9. The micro-gas pressure driving apparatus according to claim 1 , wherein the second pressure-releasing chamber and the second outlet chamber of the miniature valve module are formed in a surface of the gas outlet plate, wherein the second pressure-releasing chamber and the second outlet chamber are aligned with the first pressure-releasing chamber and the first outlet chamber of the gas collecting plate, respectively.

10. The micro-gas pressure driving apparatus according to claim 1 , wherein the gas outlet plate of the miniature valve module further comprises a raised structure corresponding to an end of the third perforation, wherein the raised structure provides a pre-force to tightly close the third perforation, or the raised structure facilitates quickly opening the third perforation.

11. A micro-gas pressure driving apparatus, comprising:
a miniature gas transportation module comprising a gas inlet plate, a fluid channel plate, a resonance membrane and a piezoelectric actuator, wherein the gas inlet plate, the fluid channel plate, the resonance membrane and the piezoelectric actuator are stacked on each other sequentially, and the resonance membrane and the piezoelectric actuator are separated from e

Assignees

• Microjet Technology Co Ltd

Inventors

• Hsueh Ta-Wei
• Chang Ying-Lun
• Wu Hsiang-Dyi
• Yu Rong-Ho
• Chen Shih-Chang
• Chou Tsung-Pat
• Lee Yau-Ji
• Liao jia-yu

Classifications

• F04B45/047

  Pumps having electric drive · CPC title

• F04B43/043

  Micropumps · CPC title

• F04B49/22

  by means of valves (F04B49/03 takes precedence) · CPC title

• F04B43/046 Primary

  with piezoelectric drive · CPC title