| 摘要 |
<p>PURPOSE:To conduct washing by rotating a motor as water is being supplied only for a fixed time which is set at a timer, and conduct stoppage automatically after the completion of work by connecting a series circuit between the always-closed contact point of the timer and a relay, and in addition, connecting the always-opened contact point of the relay at a space between a common contact point and a temporary ON contact point. CONSTITUTION:When a switch SW is operated and a switchover is made to an (a) side, a space between (c) and (a) is connected, and an action is made as a motor M and a solenoid valve MV are electrified. When work is completed, the switch SW is changed over to a (d) side. At this time, as a space between (c) and (d) is connected, a relay R is excited through a timer contact point t, and an action is made. Then, as its contact points r1, r2 are closed, the relay R is self-maintained by the contact point r2, and even if an operating hand is separated, the relay R keeps on acting. After that, when a fixed time set by a timer T has passed, the timer T makes an action and opens its contact point t. Then, the relay R is deexcited into the state of non-action, and its contact points r1, r2 are opened. As a result, electrification to the motor M and the solenoid valve MV is cut off, and stoppage is made.</p> |
