Overheat prevention apparatus and gas range having the overheat prevention apparatus

A gas range, which generates heat using gas as fuel, comprising:

• a burner, which generates fire by burning gas;
• and
• an overheat prevention apparatus comprising:
• a thermocouple, which is installed at the burner and generates a thermoelectromotive force due to burner fire;
• a magnetic opening/closing unit, which generates a magnetic force due to the thermoelectromotive force of the thermocouple so as to selectively open or close a gas supply passage through which the gas is supplied to the burner;
• and
• a timer switch, which is installed between one of two output terminals of the thermocouple and one of two input terminals of the magnetic opening/closing unit, electrically disconnects circuits the two terminals in an “OFF” status and an end-of-set status, and electrically connects the two terminals while a time setup is maintained.

An electronic overheat prevention apparatus for safely opening or closing a gas supply passage of a gas range including at least one burner, the electronic overheat prevention apparatus comprising:

• a power supply unit, which supplies direct current (DC) power having a predetermined electromotive force;
• at least one thermal sensor, which senses heat of a corresponding burner and generates a thermoelectromotive force;
• an input button unit, which receives an operating time control signal for each burner from a user;
• at least one magnetic opening/closing unit, which maintains a gas supply passage to a corresponding burner when a electromagnetic force is maintained and closes the gas supply passage when the electromagnetic force is lost;
• a digit display unit, which displays an operating time for each burner in digits;
• and
• a control circuit unit, which controls a electromagnetic force to be supplied to each magnetic opening/closing unit when a thermoelectromotive force of a thermal sensor corresponding to the magnetic opening/closing unit exceeds a predetermined threshold value, controls the electromagnetic force supplied to the magnetic opening/closing unit to be intercepted when an operating time lapses or when the thermoelectromotive force of the thermal sensor does not exceed a predetermined threshold value, and controls and manages an operating time of each burner, which is generated by adjusting a predetermined reference operating time according to the operating time control signal, as time flows,
• wherein when the operating time control signal for a burner is not received from the input button unit, the control circuit unit controls a electromagnetic force, which is supplied to a magnetic opening/closing unit corresponding to the burner, to be intercepted after the predetermined reference operating time lapses.

A gas range, which generates heat using gas as fuel, comprising:

• a gas supply unit, which supplied gas;
• at least one burner, which generates fire by burning the supplied gas;
• and
• an electronic overheat prevention apparatus comprising:
• a power supply unit, which supplies direct current (DC) power having a predetermined electromotive force;
• at least one thermal sensor, which senses heat of a corresponding burner and generates a thermoelectromotive force;
• an input button unit, which receives an operating time control signal for each burner from a user;
• at least one magnetic opening/closing unit, which maintains a gas supply passage to a corresponding burner when a electromagnetic force is maintained and closes the gas supply passage when the electromagnetic force is lost;
• a digit display unit, which displays an operating time for each burner in digits;
• and
• a control circuit unit, which controls a electromagnetic force to be supplied to each magnetic opening/closing unit when a thermoelectromotive force of a thermal sensor corresponding to the magnetic opening/closing unit exceeds a predetermined threshold value, controls the electromagnetic force supplied to the magnetic opening/closing unit to be intercepted when an operating time lapses or when the thermoelectromotive force of the thermal sensor does not exceed a predetermined threshold value, and controls and manages an operating time of each burner, which is generated by adjusting a predetermined reference operating time according to the operating time control signal, as time flows,
• wherein when the operating time control signal for a burner is not received from the input button unit, the control circuit unit controls a electromagnetic force, which is supplied to a magnetic opening/closing unit corresponding to the burner, to be intercepted after the predetermined reference operating time lapses.