| 摘要 |
An AC power source is coupled with a heater circuit containing a series circuit including a cover switch for a coffee maker, a thermal switch for controlling the temperature of a heating unit and a control switch for turning on and off a heater of the heating unit. A detecting circuit is connected between a signal take-out node as a juction point between the heater and the thermal switch and one end of the AC power source. The detecting circuit responds to a given on-off states of each of the switches to receive a detection current from the signal take-out node, and produces a detection signal for controlling a control apparatus for the coffee maker. |
