초록 ▼

An electric cooking oven for use a normal cooking mode and defrost mode is provided which comprises a detector for detecting a temperature of a food body during cooking thereof, the detector comprising a thermistor which detachably attached to the food body to sense the temperature thereof. A circui

An electric cooking oven for use a normal cooking mode and defrost mode is provided which comprises a detector for detecting a temperature of a food body during cooking thereof, the detector comprising a thermistor which detachably attached to the food body to sense the temperature thereof. A circuit is provided for compensating the gradient of the output characteristics of the temperature detector to increase the gradient of the output characteristic curve of the resistance of the thermistor as a function of temperature in when the thermistor is operating in a temperature range in which it has a low accuracy of temperature sensing.

대표청구항 ▼

An electric cooking oven comprising means for accommodating a food body to be cooked, means for heating said food body, means for detecting the temperature of said food body during the cooking thereof, said detecting means comprising a thermistor which is detachably attached to the food body to sens

An electric cooking oven comprising means for accommodating a food body to be cooked, means for heating said food body, means for detecting the temperature of said food body during the cooking thereof, said detecting means comprising a thermistor which is detachably attached to the food body to sense the temperature thereof wherein the thermistor has an output characteristic curve of resistance as a function of temperature with a first temperature range in which the error range of the resistance of the thermistor relative to the temperature is smaller than a predetermined value and a second temperature range in which the error range of the resistance of the thermistor relative to the temperature is larger than the predetermined value, an electric circuit means for converting the temperature sensed by the thermistor to an electric signal, a control means for controlling the electric power supplied to the heating means in response to the temperature signal from said circuit means to cook the food body under temperature control, instruction means for operating the thermistor in said second temperature range, and changing means for changing the characteristic curve to thereby increase the gradient of the characteristic curve of the resistance when the thermistor is operating in the second temperature range.