US 12,264,743 B2
Fluid control valve
Toshinori Kanzaki, Tokyo (JP); Wataru Takahashi, Tokyo (JP); Masahiro Hayama, Tokyo (JP); Kohei Fukudome, Tokyo (JP); and Keigo Shirafuji, Tokyo (JP)
Assigned to EAGLE INDUSTRY CO., LTD., (JP)
Appl. No. 18/019,060
Filed by EAGLE INDUSTRY CO., LTD., Tokyo (JP)
PCT Filed Jul. 27, 2021, PCT No. PCT/JP2021/027769
§ 371(c)(1), (2) Date Jan. 31, 2023,
PCT Pub. No. WO2022/030313, PCT Pub. Date Feb. 10, 2022.
Claims priority of application No. 2020-132386 (JP), filed on Aug. 4, 2020.
Prior Publication US 2023/0279952 A1, Sep. 7, 2023
Int. Cl. F16K 1/36 (2006.01); F16K 1/42 (2006.01)
CPC F16K 1/36 (2013.01) [F16K 1/42 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A fluid control valve, comprising:
a valve housing provided with an inlet port and an outlet port;
a valve body configured to be driven by a drive source; and
a spring configured to urge the valve body in a direction opposite a direction of driving by the drive source,
wherein a valve seat is formed at an edge of a through-flow passage, the valve body and the valve seat forming a poppet valve that controls a flow rate in accordance with a movement of the valve body,
a flow passage on a downstream side of the poppet valve is provided with a reduction region where a flow passage cross-sectional area tends to decrease toward the downstream side,
wherein the valve seat is formed by an annular tilted surface which is tilted with respect to an axial direction and which is formed inside the valve housing,
an inner peripheral surface which is connected continuously and directly to a downstream side edge portion of the annular tilted surface forming the valve seat is formed inside of the valve housing, and
the inner peripheral surface is a parallel peripheral surface which is parallel to the axial direction or a tilted peripheral surface which is tilted toward the valve body from an upstream side to the downstream side.