| 摘要 |
<p>PURPOSE:To normally operate even if there is a noise source such as an inverter or a fluorescent lamp. CONSTITUTION:A human detecting sensor 6 detects the user of a sanitary device. Cleaner is supplied to the sanitary device when an electromagnetic opening/ closing valve 4 is opened. The electromagnetic opening/closing valve 4 is driven by a valve drive circuit 21. By controlling the valve drive circuit 21 by means of a microcomputer 22 based on the detection of the human detecting sensor 6, the electromagnetic opening/closing valve 4 is controlled so as to supply cleaner to the sanitary device. By selecting anti-noise mode with a switch S, an emission signal of duty 50% in 38 KHZ from an emission drive circuit 23 by 12 pulse output. An emission element 6b emits light based on the emission signal. This emission signal is different from emission of an inverter or a fluorescent lamp in frequency so as not to be influenced from it. A user can be detected by detecting the reflected light of the projected light from the emission element 6b by a light receiving element 6a.</p> |
