| 摘要 |
An apparatus for electromagnetic-field-shielded heating wire used in bedding is provided to prevent an induced current from being generated on a heating wire by coating a border area of a heater wire with an earth wire and a metallic thin film, and earth the earth wire on a ground. An apparatus for an electromagnetic-field-shielded heating wire used in bedding includes a heat generating unit(C), a safety circuit unit(A), a potential checking circuit unit(E), a constant voltage circuit unit(B), an output circuit unit(D), a temperature setting circuit unit(M), a temperature detecting circuit unit(H), an overcurrent protecting circuit unit(K), a temperature comparing circuit unit(F), and a time generating circuit unit(G). The constant voltage circuit unit supplies to each unit a direct current by rectifying and smoothing a constant voltage supplied from the heat generating unit. The output circuit unit instantaneously supplies the constant voltage to the heat generating unit by the time generating circuit unit. The overcurrent protecting circuit unit outputs a control signal to the temperature setting circuit unit so as to prevent the power from being supplied to the heat generating unit irrespective of a set value of the temperature setting circuit unit. |
