| 摘要 |
<p>PROBLEM TO BE SOLVED: To simplify the assembly of a three-position type solenoid valve and reduce a cost, by forming a second valve element in such a manner that is closed by second energizing means in a direction opposite to the movable direction of a first valve element, a movable piece and the first valve element are operated by electromagnetic force generated by electromagnetic actuating means so as to push and open the second valve element. SOLUTION: During a non-power-off period, a movable piece 29 and a spool 25 are downwardly actuated by a first spring 26, and a pin 32 locked to the movable piece 29 is brought into contact with the bottom 21e of a box. At this time, a port liquid seal 22a is communicated with a second liquid chamber 21b through a first liquid chamber 21 a without being closed by the sliding corner 25b of the spool 25. While, a second valve element 27 is downwardly actuated by a second spring 28, and its liquid seal 27a closes a seat 21d. After that, when electromagnetic actuating means 30 is actuated, and upward electromagnetic force is applied to the movable piece 29, the movable piece 29 moves upwardly the spool 25 against the first spring 26, the liquid seal 27a is separated from the seat 21d, and a third port 24 is opened.</p> |
