Valve device

Patent metadata

Field	Value
Publication number	US-9802198-B2
Application number	US-201415039297-A
Country	US
Kind code	B2
Filing date	Oct 1, 2014
Priority date	Nov 26, 2013
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

A recess 22 provided in a passage block 20 ; a diaphragm covering the recess 22 to form a valve chest 21 in which a fluid flows; an inflow port 23 opened at the recess 22 and allowing the fluid to flow into the valve chest 21 ; an NC outflow port 24 and an NO outflow port 25 opened at the recess 22 and allowing the fluid to flow out from the valve chest 21 ; by oscillating the diaphragm, the diaphragm is closely fitted to any one of a first valve seat 24 b formed by an opening 24 a of the NC outflow port 24 and a second valve seat 25 b formed by an opening 25 a of the second outflow port 25 , to allow the fluid in the valve chest 21 to flow out from the other outflow port. The recess 22 has a first inclined portion 81 and a second inclined portion 82 having a depth gradually increasing from the first valve seat 24 b and the second valve seat 25 b toward the inflow opening 23.

First claim

The invention claimed is:

1. A valve device having
a recess provided in a casing;
a diaphragm covering the recess so as to form a valve chest as a space between the recess and the diaphragm in which a fluid flows;
an inflow port opened at the recess and allowing the fluid to flow into the valve chest;
an outflow port opened at the recess and allowing the fluid to flow out from the valve chest; and
a diaphragm driving means for oscillating the diaphragm

to allow the diaphragm to closely fit to or
separate from a valve seat
formed by an opening of the outflow port
so as to shut or open the outflow port,
characterized in that
the recess has an inclined portion whose depth gradually increases from the valve seat side toward an inflow opening where the inflow port communicates with the valve chest,
the valve chest has a vertical direction in which the outflow port and the inflow port are arranged, and a width direction orthogonal to the vertical direction and the direction of the depth, and
by a first protrusion provided on each side of the inflow opening in the width direction, the inclined portion has a taper shape in which the width is gradually increased from the inflow opening toward the valve seat.

2. The valve device as set forth in claim 1 , wherein, from the both sides of the valve chest in the width direction toward the inflow opening, the first protrusion is gradually increased in the inclination with respect to a plane passing through the inflow opening.

3. The valve device as set forth in claim 1 , wherein the outflow port is provided as a dual system including a first outflow port and a second outflow port,
the diaphragm driving means oscillates the diaphragm so as to allow the diaphragm to closely fit to any one of a first valve seat formed by an opening of the first outflow port and a second valve seat formed by an opening of the second outflow port, and thereby the fluid in the valve chest is allowed to flow out from the other side of the first outflow port or the second outflow port,
the recess has a first inclined portion whose depth gradually increases from the first valve seat side toward the inflow opening where the inflow port communicates with the valve chest, and a second inclined portion whose depth gradually increases from the second valve seat side toward the inflow opening,
the first outflow port, the inflow port, and the second outflow port are disposed in this order, and
the first inclined portion and the second inclined portion are gradually increased in the width from the inflow opening toward the first valve seat and the second valve seat.

4. The valve device as set forth in claim 1 , wherein the inclined portion has a taper angle of 30 to 60 degrees in a plan view viewed from the diaphragm side.

5. The valve device as set forth in claim 1 , wherein, in a peripheral edge of the recess, a holding surface closely fitting to the diaphragm and holding the diaphragm is formed, and
the depth from the holding surface to the first protrusion is more than 0 mm.

6. The valve device as set forth in claim 1 , wherein the inclined portion is provided with a second protrusion protruding toward the diaphragm.

7. The valve device as set forth in claim 1 , wherein a depth of the inflow opening is more than a depth of the valve seat.

8. The valve device as set forth in claim 7 , wherein the difference between the depth of the inflow opening and the depth of the valve seat is 0.3 mm or more.

9. The valve device as set forth in claim 1 , wherein the valve seat protrudes toward the diaphragm.

10. The valve device as set forth in claim 1 , wherein the inclined portion inclines at an angle of 3 degrees to 15 degrees with respect to a plane passing through the inflow opening.

11. The valve device as set forth in claim 1 , wherein the casing includes a first block on which the recess is formed and a second block fixed to the first block and holding the diaphragm, and
when a mating surface between the first block and the second block is used as a reference surface, the depth DA of the valve seat is 1.5 mm to 2.5 mm, and the depth DB of the inflow opening is 2.0 mm to 3.0 mm.

12. The valve device as set forth in claim 1 , wherein the diaphragm driving means includes a coil and a plunger giving displacement to the diaphragm when the coil is electrified.

Assignees

• Sumitomo Rubber Ind

Inventors

• Futamata Kazuo
• Ishimaru Takeshi
• Morita Kouhei

Classifications

• B01L3/567 Primary

  Valves, taps or stop-cocks · CPC title

• F16K31/0641

  the valve member being a diaphragm · CPC title

• F16K7/14 Primary

  arranged to be deformed against a flat seat · CPC title

• F16K11/0525

  the closure members being pivoted around an essentially central axis · CPC title

• B01L2200/0605

  Metering of fluids · CPC title