Hitachi Heating Appliances Co., Ltd.

Hisayuki Serizawa

Osami Tatsukawa

Isao Takoh

Osamu Sakurai

Keiji Oouchi

A cooking appliance including both a resistive heating element and a high-frequency wave source such as a microwave generator in which a metal skewer is easily insertable through a front opening in a heating chamber and in which changes in dimensions in supporting members for the skewer are absorbed totally. A ceramic coupling member extends between a polygonally-shaped rotary shaft end and the metal skewer with a coupling hole in the coupling member being detachably insertable over the polygonally-shaped rotary shaft end. The skewer extends into a through-hole in the coupling member which has a shape similar to that of the skewer. A spring is provided to urge the coupling member outwardly into engagement with the rotary shaft end.

High-frequency heating appliance

The present invention involves a high-frequency heating apparatus of the type which comprises a heating chamber for accommodating an object to be heated, a door openably and closably provided for an opening of the heating chamber, a high-frequency energy generator for supplying high-frequency energy to the interior of the heating chamber, a fan for forcibly ventilating the interior of the heating chamber, and a heating chamber air-outlet cooperative with the fan to effect the forcible ventilation for the interior of the heating chamber. Temperature of air flowing out of heating chamber through the heating chamber air-outlet is detected by a temperature sensor to actuate an automatic heating control unit for controlling the supply of high-frequency energy. The apparatus is also provided with a manual heating control unit for manually controlling the heating time. In response to a selective operation of one of the automatic heating control unit and the manual heating control unit, an air flow path changer is actuated to change a part of the flow path of the air for ventilating the interior of the heating chamber.

Growing community of inventors

Tsuchiura, Japan

Hisayuki Serizawa