| 摘要 |
A circuit for driving a grill heater of a microwave oven is provided to prevent a fire due to overheat by connecting two grill heaters in series or in parallel. A circuit for driving a grill heater of a microwave oven includes first and second grill heaters(110,120) and first to third thermostats(Th1-Th3). The first and second grill heaters increase an inner temperature through power by connecting both sides thereof to each other. The first thermostat is connected between the first and second grill heaters and connects the first and second grill heaters in series or in parallel by being turned on/off according to the inner temperature. One side of the second thermostat is connected to the power and the other side thereof is connected to the first grill heater to turn on/off the second thermostat according to the inner temperature. One side of the third thermostat is connected to the power and the other side thereof is connected to the first grill heater at an opposite side to the second thermostat to turn on/off the third thermostat according to the inside temperature. |
