| 摘要 |
PURPOSE:To control the flow passage of fluid to open or close and at the same time to control variably the opening area of a flow passage by magnetizing stationary magnetic poles by an armature coil to slide a rotatable iron core in the axial direction, and further rotating the rotatable iron core in response to magnetizing conditions. CONSTITUTION:When a current is passed through an armature coil 1 so as to generate a magnetizing force that attracts a rotatable iron core 3 to stationary magnetic poles 2 under such a condition that the rotatable iron core 3 is not given a rotary motion, the rotatable iron core 3 is fitted to be held in an opened valve condition. At this time, a flow control valve body 6 closes almost fully the outlet 11 of the valve. Next, when a current is passed through the armature coil 1 so as to rotate the rotatable iron core 3 by an angle of 90 deg., the valve body 6 makes the opening area of fluid flow passage communicating with the valve outlet 11 in a half-opened condition. On the other hand, when a current passing through the armature coil 1 is stopped, the energizing force of a spring 7 becomes greater than the magnetic force between the permanent magnet of rotatable iron core 3 and stationary magnetic poles to lower the open/close valve body 5, so that a sheet 15 is seated on a valve seat 13 to fully close the fluid flow passage.
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