| 摘要 |
PURPOSE:To make satisfactory the responsiveness of a solenoid valve to changeover operation, by disposing a nonmagnetic member between solenoids and as well by disposing, in a stationary valve section, a movable valve part made of nonmagnetic materials. CONSTITUTION:A valve 4 is changed over by energizing solenoids 10, 10a, only one of movable iron cores 5, 6 disposed on both sides of a movable valve part 19, is attracted. Therefore, since the bulk to be magnetized is small, an energy loss for magnetization is less so that the power of energization may be effectively used. Further, the movable iron cores 5, 6 may be separated from each other to opposite sides by the movable valve part 19 made of nonmagnetic materials, and the other parts between both solenoids 10, 10a include thereamong a nonmagnetic member 3 so that both solenoids 10, 10a establish magnetic paths which are substantially independent from each other. Further, each one of both solenoids only one of which is energized, is operated such that the residual magnetism of magnetic path of the opposite solenoid is cancelled out even if it affects to the magnetic path of the opposite solenoid. Accordingly, it is possible to eliminate a delay in the operation of the valve due to the residual magnetism, and as well to ensure the precise operation of the iron cores even if the both solenoids are closely adjacent to each other due to that the length of the movable iron cores is made short. |
