초록 ▼

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 b

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.

대표청구항 ▼

The coffee maker comprising a mill mechanism for milling coffee beans held in a case to provide coffee powder and a drip mechanism for pouring hot water into the coffee powder to make coffee: a heater circuit with a series circuit connected across an AC power source and including a main switch, a he

The coffee maker comprising a mill mechanism for milling coffee beans held in a case to provide coffee powder and a drip mechanism for pouring hot water into the coffee powder to make coffee: a heater circuit with a series circuit connected across an AC power source and including a main switch, a heater contained in said drip mechanism, a normally closed thermal switch which is turned off when the temperature of said heater exceeds a given value, and a heater switch for said heater which is turned on after said main switch is turned on; and a detecting circuit connected with a signal take-out node of a given end of said series circuit and for detecting that said main switch is ON and at least one of said thermal switch and said heater switch is OFF.