Solenoid valve

Patent metadata

Field	Value
Publication number	US-9377123-B2
Application number	US-201314031235-A
Country	US
Kind code	B2
Filing date	Sep 19, 2013
Priority date	Sep 26, 2012
Publication date	Jun 28, 2016
Grant date	Jun 28, 2016

Abstract

A solenoid valve is provided with a valve main body having a valve chamber communicating with an inlet port and a first outlet port, a valve body arranged within the valve chamber, a valve holder retaining the valve body, a coil spring energizing the valve holder, a pipe member having a second outlet port communicating with the valve chamber, a suction element surrounding the pipe member, a coil bobbin winding an electromagnetic coil, and a mold cover surrounding a whole of the coil bobbin, integrated with the valve main body, and defining the valve chamber. The valve holder has a tube body facing to the suction element, and a small tube portion formed smaller in diameter than the tube body, pierced a fluid insertion hole in an intermediate portion, and having a retention portion retaining the valve body in an inner side of a leading end.

First claim

What is claimed is:

1. A solenoid valve comprising:
a valve main body which has a valve chamber communicating with each of an inlet port and a first outlet port;
a valve body which is arranged within said valve chamber;
a valve holder which retains said valve body and is made of a magnetic material;
an energizing member which energizes said valve holder in a direction of said first outlet port;
a pipe member which has a second outlet port communicating with said valve chamber and is extended upward from said valve chamber;
a suction element which is formed in a cylindrical shape and surrounds said pipe member, such that said pipe member is inside said suction element, wherein said suction element is configured to be separated from a fluid flow passing through said solenoid valve;
a coil bobbin which surrounds said valve holder and said suction element;
an electromagnetic coil, wherein said electromagnetic coil is wound around said coil bobbin; and
a mold cover which surrounds a whole of said coil bobbin, is integrated with said valve main body and defines said valve chamber by said valve main body, said pipe member and said coil bobbin,
wherein said valve main body, said pipe member, said coil bobbin and said mold cover are formed by a resin material,
wherein said suction element is made of a magnetic metal,
wherein said valve holder is slidably arranged inside a lower portion of said coil bobbin, and has a tube body which faces to said suction element, a fluid insertion hole which is pierced in said tube body, and a retention portion which retains said valve body,
wherein when said electromagnetic coil is excited, said valve holder is sucked by said suction element and said valve body closes said second outlet port of said pipe member,
wherein when said electromagnetic coil is not excited, said valve holder is energized by said energizing member and said valve body closes said first outlet port,
wherein said coil bobbin is provided with a collar wall which faces to said valve main body, and an annular welding projection portion which protrudes toward said valve main body from said collar wall and is welded to an inner peripheral surface of said mold cover,
wherein said annular welding projection portion is provided with a tapered surface, wherein the diameter of said tapered surface is reduced from an inner peripheral surface in a leading end side of said annular welding projection portion toward an inner peripheral surface in a base side of said annular welding projection portion, and a burr accommodating space which is constructed between said tapered surface and an outer peripheral surface of said valve holder, and
wherein said annular welding projection portion accommodates in said burr accommodating space a burr which is generated in a bonded surface between said annular welding projection portion and the inner peripheral surface of said mold cover when said mold cover is resin molded in said coil bobbin so as to keep clearance.

2. The solenoid valve according to claim 1 , wherein said valve holder is provided with a small tube portion which is formed at a smaller diameter than said tube body.

3. The solenoid valve according to claim 1 , wherein said pipe member, said coil bobbin and said mold cover are formed sequentially according to a resin molding process, and said mold cover and said valve main body are integrally formed by a laser welding process.

4. The solenoid valve according to claim 2 , wherein said pipe member, said coil bobbin and said mold cover are formed sequentially according to a resin molding process, and said mold cover and said valve main body are integrally formed by a laser welding process.

5. The solenoid valve according to claim 2 , wherein said small tube portion is provided with said fluid insertion hole and said retention portion.

6. The solenoid valve according to claim 1 , wherein said suction element is arranged between an inner peripheral surface of said coil bobbin and an outer peripheral surface of said pipe member.

Assignees

• Fujikoki Corp

Inventors

• Kibune Hitoshi

Classifications

• Y10T137/87708

  With common valve operator · CPC title

• F16K27/029 Primary

  Electromagnetically actuated valves · CPC title

• F16K31/0606 Primary

  fluid passing through the solenoid coil · CPC title

• Y10T137/86622

  Motor-operated · CPC title

• F16K31/0627

  with movable valve member positioned between seats · CPC title