Solenoid valve

Patent metadata

Field	Value
Publication number	US-10024452-B2
Application number	US-201515504679-A
Country	US
Kind code	B2
Filing date	Apr 14, 2015
Priority date	Aug 20, 2014
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

A solenoid valve (10) has a U-shaped fixed iron core (50) with a driving leg (51), a supporting leg (52), and a yoke portion (53) integrally formed. One end portion of a movable iron core (60) which drives a poppet valve (41) abuts on the supporting leg (52), and the other end portion of the movable iron core (60) abuts on the driving leg (51). A sealing member (81) is disposed between and a valve housing (11) and a fixed flange (58) of a bobbin (54) attached to the fixed iron core (50). A sealing member (83) is disposed between an abutting flange (57) of the bobbin (54) and the yoke portion (53).

First claim

The invention claimed is:

1. A solenoid valve comprising:
a valve housing having ports and in which a poppet valve is assembled;
the poppet valve being operated between a closed position in which the poppet valve abuts on a valve seat to block communication among the ports, and an open position in which the poppet valve separates from the valve seat to enable communication among the ports;
a fixed iron core which is assembled into the valve housing and is provided with: a supporting leg abutting on one end portion of a movable iron core which drives the poppet valve; a driving leg extending in parallel to the supporting leg and abutting on the other end portion of the movable iron core; and a yoke portion provided between a base end portion of the supporting leg and a base end portion of the driving leg; the supporting leg, the driving leg, and the yoke portion being integrally formed with each other;
a coil provided on the fixed iron core;
a sealing flange is provided on a leading end portion of the supporting leg, the sealing flange being larger in depth than the supporting leg, and the supporting leg being equal in width to the sealing flange; and
an abutting protrusion is formed on the supporting leg closer to the leading end portion than the sealing flange, and the sealing flange has a sealing surface which surrounds the abutting protrusion.

2. The solenoid valve according to claim 1 , wherein the supporting leg is larger in width than the driving leg, and the yoke portion is equal in width to the supporting leg.

3. The solenoid valve according to claim 1 , wherein the yoke portion has a sealing surface which surrounds the driving leg.

4. The solenoid valve according to claim 1 , wherein the driving leg, the supporting leg, and the yoke portion each has a quadrilateral shape in cross-section.

5. The solenoid valve according to claim 1 , wherein
the valve housing has among the ports a first port and a second port, and a flow passage portion which is provided with a first valve seat having a first communication hole through which the first port and the second port communicate with each other;
the valve housing further has a third port and a flow passage block which is provided with a second valve seat having a second communication hole through which the second port and the third port communicate with each other; and
the poppet valve abuts on the first valve seat to block communication between the first and second ports while the poppet valve separates from the second valve seat to allow the second and third ports to communicate with each other when the coil is de-energized; and the poppet valve abuts on the second valve seat to block communication between the second port and the third port while the poppet valve separates from the first valve seat to allow the first and second ports to communicate with each other when the coil is energized.

6. The solenoid valve according to claim 1 , wherein the fixed iron core is provided with a bobbin having: a cylindrical main body around which the coil is wound; an abutting flange provided on a base end portion of the cylindrical main body and abutting on the yoke portion; a fixed flange provided on a leading end portion of the cylindrical main body and fixed into the valve housing; and
a sealing member is disposed between the abutting flange and the yoke portion.

7. The solenoid valve according to claim 6 , wherein a first sealing member is disposed between the fixed flange and the valve housing.

8. The solenoid valve according to claim 7 , wherein a second sealing member is disposed between the fixed flange and the sealing flange provided on the leading end of the supporting leg.

Assignees

• Koganei Ltd

Inventors

• Ohki Hirokazu

Classifications

• F16F1/187

  shaped into an open profile, i.e. C- or U-shaped · CPC title

• F16F1/027

  Planar, e.g. in sheet form; leaf springs · CPC title

• F16K11/044

  with movable valve members positioned between valve seats · CPC title

• F16K31/0648

  the armature and the valve member forming one element (F16K31/0651 takes precedence) · CPC title

• F16F1/185

  characterised by shape or design of individual leaves (F16F1/22 takes precedence) · CPC title