MICROVALVE SWITCHING ARRAY

• US 20070051415A1
• Filed: 09/07/2005
• Published: 03/08/2007
• Est. Priority Date: 09/07/2005
• Status: Abandoned Application

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Wang, Tzu-Yu
• Application Number:
  US11/162,336
• Publication Number:
  US 20070051415A1
• Time in Patent Office: Days
• US Class Current: 137/861
• CPC Class Codes: F16K 2099/0078 using moulding or stamping
• CPC Class Codes: F16K 2099/008 Multi-layer fabrications
• CPC Class Codes: F16K 2099/009 Fluid power devices
• CPC Class Codes: F16K 99/0001 Microvalves microdevices B81B1/00; manufacture or treatment of devices or systems in or on a substrate B81C1/00; microfluidic structures B01L3/5027; micropumps F04B19/006
• CPC Class Codes: F16K 99/0015 Diaphragm or membrane valves
• CPC Class Codes: F16K 99/0034 Operating means specially adapted for microvalves
• CPC Class Codes: F16K 99/0051 using electrostatic means
• CPC Class Codes: Y10T 137/877 With flow control means for branched passages

Abstract

A low power switching valve array employing two or more actuated microvalves that are arranged to accommodate any desired number of inlets and any desired number of outlets. Fluid entering one of inlets may be directed to any one or more of the outlets. In one illustrative embodiment, a valve body may have a valve array inlet, and two or more pumping chambers defined within the valve body. Each of the two or more pumping chambers have an inlet in fluid communication with the valve array inlet. In another illustrative embodiment, a valve body may have a valve array outlet, and two or more pumping chambers defined within the valve body. Each of the two or more pumping chambers have an outlet in fluid communication with the valve array outlet.

Claims

1. A switching valve array, comprising:

a valve body;

a first chamber defined within the valve body, the first chamber having a first inlet and a first outlet;

a first diaphragm disposed within the first chamber, the first diaphragm having a first position in which fluid flow into the first outlet is restricted, and an second position in which fluid flow into the first outlet is permitted;

a second chamber defined within the valve body, the second chamber having a second inlet and a second outlet;

a second diaphragm disposed within the second chamber, the second diaphragm having a first position in which fluid flow into the second outlet is restricted, and a second position in which fluid flow into the second outlet is permitted; and

a valve array inlet in fluid communication with the first inlet and the second inlet.

2. The switching valve array of claim 1, wherein the first diaphragm and the second diaphragm are adapted to be independently actuated to selectively prevent fluid entering the valve array inlet from exiting the first outlet or the second outlet, to permit said fluid to exit from one of the first outlet or the second outlet, or to permit said fluid to exit through both the first outlet and the second outlet.

3. The switching valve array of claim 1, wherein the valve body has a first surface and a second opposing surface, and the valve array inlet is on the first surface.

4. The switching valve array of claim 3, wherein the first inlet and the second inlet are on the first surface.

5. The switching valve array of claim 3, wherein the first inlet and the second inlet are on the second surface.

6. The switching valve array of claim 1, wherein the first chamber and the second chamber are each adapted to accommodate gas and/or liquid fluids.

7. The switching valve array of claim 1, wherein the first chamber further comprises a first normally open port positioned within the first chamber such that fluid entering the first chamber exits through the first normally open port when the first diaphragm is positioned to restrict fluid from entering the first outlet.

8. The switching valve array of claim 7, wherein the first diaphragm has at least one aperture positioned to permit fluid to flow from the first inlet to the first normally open port when the first diaphragm is in the first position.

9. The switching valve array of claim 1, wherein the second chamber further comprises a second normally open port positioned within the second chamber such that fluid entering the second chamber exits through the second normally open port when the second diaphragm is positioned to restrict fluid from entering the second outlet.

10. The switching valve array of claim 9, wherein the second diaphragm has at least one aperture positioned to permit fluid to flow from the second inlet to the second normally open port when the second diaphragm is in the first position.

11. The switching valve array of claim 1, wherein the first diaphragm and the second diaphragm are electrostatically actuated between the first position and the second position and/or between the second position and the first position.

12. The switching valve array of claim 1, wherein the first chamber further comprises a first pressure control port positioned such that fluid entering the first chamber is prevented from exiting the first pressure control port.

13. The switching valve array of claim 12, wherein the first diaphragm is configured to prevent fluid from passing from the first inlet to the first pressure control port.

14. The switching valve array of claim 1, wherein the second chamber further comprises a second pressure control port positioned such that fluid entering the second chamber is prevented from exiting the second pressure control port.

15. The switching valve array of claim 14, wherein the second diaphragm is configured to prevent fluid from passing from the second inlet to the second pressure control port.

16. The switching valve array of claim 1, further comprising:

an n^th chamber defined within the valve body, the n^th chamber having an n^th inlet and an n^th outlet, the n^th inlet in fluid communication with the valve array inlet; and

an n^th diaphragm disposed within the n^th chamber, the n^th diaphragm having a first position in which fluid flow into the n^th outlet is restricted, and a second position in which fluid flow into the n^th outlet is permitted;

wherein “

n”

is an integer greater than two.

17. A switching valve array, comprising:

a valve body;

a first chamber defined within the valve body, the first chamber having a first inlet and a first outlet;

a first diaphragm disposed within the first chamber, the first diaphragm having a first position in which fluid flow into the first outlet is restricted, and an second position in which fluid flow into the first outlet is permitted;

a second chamber defined within the valve body, the second chamber having a second inlet and a second outlet;

a second diaphragm disposed within the second chamber, the second diaphragm having a first position in which fluid flow into the second outlet is restricted, and a second position in which fluid flow into the second outlet is permitted; and

a valve array outlet in fluid communication with the first outlet and the second outlet.

18. A switching valve array, comprising:

a valve body;

a first chamber defined within the valve body, the first chamber having a first inlet and a first outlet;

a first diaphragm disposed within the first chamber, the first diaphragm having a first position in which fluid flow into the first outlet is restricted, and a second position in which fluid flow into the first outlet is permitted;

a second chamber defined within the valve body, the second chamber having a second inlet and a second outlet;

a second diaphragm disposed within the second chamber, the second diaphragm having a first position in which fluid flow into the second outlet is restricted, and a second position in which fluid flow into the second outlet is permitted;

a third chamber defined within the valve body, the third chamber having a third inlet and a third outlet, the third inlet in fluid communication with the first outlet and the second outlet;

a third diaphragm disposed within the third chamber, the third diaphragm having a first position in which fluid flow into the third outlet is restricted, and a second position in which fluid flow into the third outlet is permitted;

a fourth chamber defined within the valve body, the fourth chamber having a fourth inlet and a fourth outlet, the fourth inlet in fluid communication with the first outlet and the second outlet; and

a fourth diaphragm disposed within the fourth chamber, the fourth diaphragm having a first position in which fluid flow into the fourth outlet is restricted, and a second position in which fluid flow into the fourth outlet is permitted.

19. The electrostatically actuated switching valve array of claim 18, wherein fluid entering either or both of the first inlet and the second inlet may be selectively directed to either or both of the third outlet and the fourth outlet.

20. The electrostatically actuated switching valve array of claim 18, wherein each of the first chamber, the second chamber, the third chamber and the fourth chamber further comprise a normally open port positioned within each chamber such that fluid entering each chamber exits through each normally open port when each diaphragm is positioned to restrict fluid from entering the corresponding outlet.

21. The electrostatically actuated switching valve array of claim 18, wherein each of the first chamber, the second chamber, the third chamber and the fourth chamber further comprise a pressure control port positioned within each chamber such that fluid entering each chamber is prevented from exiting the corresponding pressure control port.