| 摘要 |
This invention relates to a solenoid valve. In a conventional solenoid valve, the supply of power to an electromagnetic coil must be continued in order to keep a valve seat in an open or closed state and this results in the problem that power consumption is large. To solve this problem, the solenoid valve in accordance with the present invention comprises an electromagnetic coil, an armature composed of a permanent magnet capable of moving inside a center hole of the electromagnetic coil in its axial direction and equipped with a valve body for substantially opening and closing the valve seat at the end portion inside a flow path on the valve seat side, a fixed magnetic pole made of a magnetic material so that the armature can be attracted by its own magnetic force even when the supply of power to the electromagnetic coil is stopped and disposed at the position where it attracts the armature when the power is supplied to the electromagnetic coil, and biasing means for biasing always the armature to the valve seat. The valve of the invention can be used as means for shutting off or allowing the flow of a fluid or for controlling a flow rate. |
