US 12,264,753 B2
Solenoid valve
Hiroyuki Iwanaga, Tokyo (JP); Tadanobu Kawato, Tokyo (JP); and Masaki Hoshi, Tokyo (JP)
Assigned to EAGLE INDUSTRY CO., LTD., (JP)
Appl. No. 18/034,662
Filed by EAGLE INDUSTRY CO., LTD., Tokyo (JP)
PCT Filed Oct. 25, 2021, PCT No. PCT/JP2021/039229
§ 371(c)(1), (2) Date Apr. 28, 2023,
PCT Pub. No. WO2022/097514, PCT Pub. Date May 12, 2022.
Claims priority of application No. 2020-185376 (JP), filed on Nov. 5, 2020.
Prior Publication US 2023/0400117 A1, Dec. 14, 2023
Int. Cl. F16K 31/06 (2006.01); H01F 7/08 (2006.01)
CPC F16K 31/0675 (2013.01) [H01F 7/081 (2013.01); H01F 2007/083 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A solenoid valve, comprising:
a movable iron core that is movable in an axial direction;
a solenoid molded body disposed outside the movable iron core in a radial direction and including a coil;
a solenoid casing configured to accommodate the movable iron core and the solenoid molded body;
a fixed iron core disposed inside the solenoid molded body in the radial direction configured to generate a magnetic force between the fixed iron core and the movable iron core when the coil is energized; and
a valve unit configured to open and close a flow passage in accordance with a movement of the movable iron core,
wherein a magnetic material separate from the solenoid casing is disposed at an axial end portion of the coil outside the solenoid casing, and
wherein an annular step portion recessed in a radially inward direction is formed in an outer portion of the solenoid casing at the axial end portion of the coil, and the magnetic material is disposed within the annular step portion.