| 摘要 |
PURPOSE: To provide a flow rate control valve with a small difference between a valve opening response time from a closed valve state to an opened valve state and a valve closing response time from the opened valve state to the closed valve state. CONSTITUTION: A fixed iron core 5 excited by a solenoid 3 is provided on the upper part of the bobbin 2 of a duty control valve 1, and a valve chamber 8 for giving connection between a flow-in passage 6 and a flow-out passage 7 is formed in the lower part of the fixed iron core 5. A valve body 9 is housed in the valve chamber 8 vertically movably and the valve body 9 is energized by a return spring 11 to a valve seat part 10 provided in the lower part of the valve chamber 8. A tapered suction part 12 is formed on the bottom end part of the fixed iron core 5 and a slant surface 13 inclining by a taper angleθrelative to the moving direction of the valve body 9 is formed on the side surface of the suction part 12. A recessed part 14 matching the suction part 12 is provided on the upper end part of he valve body 9 and an opposing surface 15 is formed in parallel to the slant surface 13 is formed on the internal wall of the recessed part of 14. A through hole 16 is provided in the center of the valve body 9, and shock absorbing rubber 17 is fitted to the inside of the through hole 16.
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