| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a battery-driven controller for an automatic ventilation device, for automating the ventilation operation of an agricultural house disposed in a place without power distribution at low cost. <P>SOLUTION: A latching relay 1 electrically preventing malfunction due to oscillation is built in an electric circuit of the controller, thereby controlling the drive of a motor and the rotating direction and making the power consumption in standby state zero. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
