초록 ▼

During operation of a microwave oven, steps are taken to determine whether the oven is being operated in the absence of food therein and to shut down the oven if that state is found to exist. Initially, a high frequency detector disposed in the cooking chamber absorbs high frequency and produces hea

During operation of a microwave oven, steps are taken to determine whether the oven is being operated in the absence of food therein and to shut down the oven if that state is found to exist. Initially, a high frequency detector disposed in the cooking chamber absorbs high frequency and produces heat in proportion to the absorbed high frequency. A temperature sensor senses the temperature of that produced heat and generates an output signal as a function thereof. After a predetermined time period, that output signal is compared to a reference value which represents a temperature expected to occur in the event that the oven is being operated in the absence of food. If it is determined from that comparison that no food is present in the oven, the oven is deactivated and an alarm is activated.

대표청구항 ▼

A high frequency detecting apparatus comprising: a high frequency absorbent body formed of compressed high molecular powder for absorbing high frequency from a high frequency generator and generating heat in proportion to the absorbed high frequency; a temperature detector disposed inside a portion

A high frequency detecting apparatus comprising: a high frequency absorbent body formed of compressed high molecular powder for absorbing high frequency from a high frequency generator and generating heat in proportion to the absorbed high frequency; a temperature detector disposed inside a portion of said body for detecting a temperature of the heat generated by said body; and a thermal insulation material encompassing said portion of said body in which said detector is disposed, with another portion of said body disposed outside said thermal insulation material.