| 摘要 |
<p>PURPOSE:To simplify installation work by controlling the action of a main body unit of air cleaner by means of a signal generating device provided apart from the unit to perform electric power source wiring without using private wiring. CONSTITUTION:There are provided a signal generating device 7 connected to an electric power source wiring 9 of automobile and a main body unit 8 of air cleaner, and the device 7 includes a signal generating circuit 13 for superposing a plurality of signals on the wiring 9, selection switches 14, 15 for selecting a plurality of signals generated by the circuit 13, and a filter 12, and the unit 8 includes a signal detection circuit 17 for identifying a plurality of signals superposed on the wiring 9 and a plurality of switches 18, 19 for opening and closing load by means of the output of the circuit 17 and the switches 14, 15 are opened and closed to control the action of load 20.</p> |
