| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent damage on an apparatus by realizing that power sources of AC100 V and AC200 V are accidentally alternately wired to the same apparatus in an initial construction. <P>SOLUTION: An erroneous wiring protector of a bath room dryer fan comprises a circulation fan 9 and a heater 10 connected to an AC200 V connecting terminal base 6 through relay contacts 15b and 16b for normally-open circulation fan and heater, a twin contact 14b of a normally-open ventilation fan relay provided between an AC100 V connecting terminal base 7 and a ventilation fan connecting terminal base 8 to which a ventilation fan 5 is connected, and a control circuit 13 which receives electricity from a power source circuit 11 which outputs a AC voltage and controls the circulation fan, the heater relay, and the relay for the ventilation fan. It also comprises a voltage discriminating circuit 20 which is connected to the AC100 V connecting terminal base and outputs a detection signal only when it detects a voltage of AC200 V, and a control circuit which receives the detection signal and controls to keep at least the open state of the twin contact of the ventilation fan relay. <P>COPYRIGHT: (C)2004,JPO |
