| 摘要 |
PURPOSE: A heating device using an electromagnetic field blocking heating line is provided to protect a user by automatically blocking power if an error is detected by the variation of a heating line resistance. CONSTITUTION: A hot wire is comprised of a primary winding and a primary coating which protects the primary winding. A magnetic field offsetting line offsets a magnetic field generated by a hot wire. An electric filed blocking line blocks an electric field generated by the hot wire and the magnetic field offsetting line. A bimetal(314R,314L) is connected between the hot wire and the magnetic field offsetting line. A temperature sensor(312R,312L) includes a temperature sensor for sensing the temperature of a heating mat. A power blocking unit(322) blocks AC power when a fault is detected. An error detecting unit(323R,323L) detects an error by monitoring a voltage. A temperature display unit(326) displays a current temperature and a preset temperature. A control unit(324) blocks power if the error is detected. |
