Sharp Kabushiki Kaisha Corporation

Riccar Company, Ltd.

Keiichiro Doi

Seiji Tanaka

Shigeki Kondo

Tomofumi Iketani

Yoshio Yamazaki

Minoru Makita

Masaaki Kowada

Toshihiro Kashiwagi

An improved exciting arrangement for an induction heating apparatus which includes a heating coil disposed in a spaced relation between a top plate for placing a vessel of magnetizable material to be heated and a bottom plate, so as to be impressed with high frequency current, a shielding plate member of non-magnetizable metallic material disposed in a space between the heating coil and the bottom plate, and a coil support member of highly magnetizable material providing a high electrical resistance, disposed between the heating coil and the shielding plate so as to cover part of the peripheral portion of the heating coil.

Exciting arrangement for induction heating process

The disclosure is directed to an improved electromagnetic cooking apparatus which is so arranged that the maximum voltage to be impressed to a switching transistor employed in it may be lowered to a desired level for a stable operation at high reliability.

Electromagnetic cooking apparatus

An improved induction heating apparatus as applied, for example, to a cooking oven in which there is employed a magnet having a bore formed in it, with a thermistor being installed on the top plate of the apparatus in a position corresponding to the bore so as to eliminate possible breakage of the thermistor, while the curie temperature of the magnet member is set at a predetermined level for further improvement in safety.

Induction heating apparatus with thermistor and magnetic sensor

A heating appliance comprises a generation circuit of a magnetron for effecting a series of cooking operations at least one of which requires manual cooking operation by an operator adapted to a foodstuff therein and an indicator for announcing to the operator that the manual cooking operation is to be conducted concerning the foodstuff.

Cooking operation announcement means of microwave oven

A microwave oven comprises a digital control circuit for controlling microwave generation, and a multi-digit digital display unit for displaying a cooking condition. A determination system is associated with a door switch for developing a display control signal when a cook start switch is actuated before an oven door is tightly closed. In response to the display control signal, an alarm display, for example, 'DOOR' is provided on the multi-digit digital display unit. The microwave oven further comprises a food temperature sensor probe for sensing a temperature of foodstuff being cooked. The multi-digit digital display unit provides another alarm display, for example, 'PROBE' if the cook start switch is actuated under the condition where the food temperature sensor probe is not placed in its operative condition even though the food temperature control mode of operation is selected.

Growing community of inventors

Izumi, Japan

Keiichiro Doi