Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Kohei Kawata

Hidekazu Suzuki

Hiroyuki Katsube

Taihei Oguri

Kenzo Usui

Takanori Handa

Takeshi Ishii

Nagisa Kuwahara

An antenna part of a magnetron includes an exhaust portion that is connected to an antenna conductor derived from an anode part and has an output terminal from which a microwave is outputted, and an output-side ceramic stem that holds internally the antenna conductor and is firmly fixed to the exhaust portion to insulate electrically a side pipe connected to the anode part of a main body of the magnetron from the exhaust portion. An antenna part further includes an antenna cap that is joined to the exhaust portion by a conductive adhesive arranged on an outer periphery of the exhaust portion. Accordingly, it is possible to provide the magnetron that can prevent occurrence of electric discharge between the antenna cap and the exhaust portion.

Magnetron

A magnetron includes a cooling block having an annular continuous portion with opposite end portions opposed to each other, the cooling block being secured to an outer peripheral surface of the cylindrical anode body, the cooling block having a coolant circulation pathway defined therein, a tightening member engageable with the opposite end portions of the cooling block to tighten the cooling block by reducing a distance between the opposite end portions of the cooling block, and a pair of pipe joints each connected to a portion of the cooling block adjacent to one of the opposite end portions so as to communicate with the coolant circulation pathway. The tightening member is disposed between connecting portions of the pair of pipe joints with the cooling block so as to extend in a direction inclined with respect to a plane including an annular direction of the cooling block.

An induction cooking device includes a light-pervious top plate on which a container with liquid contained therein is to be placed. A heating coil resides below the top plate to heat the container. An electrode is located at a portion of a lower surface of the top plate outward of a periphery of the heating coil. A capacitance detection device detects changes in capacitance of the electrode caused by liquid boiled over from the container. The top plate includes a light emitting part by which visible light, applied from a light source placed below the top plate, is transmitted to fulfill light emission. The light emitting part is located at a portion of the top plate between the periphery of the heating coil and the electrode, as viewed from above the top plate.

Induction cooking device

The cooking device includes a top plate on which a container is to be placed, heating devices provided below the top plate, electrodes provided in a lower face of the top plate and including a boiling-over detection parts placed near an outer periphery of a portion of the top plate positioned above the heating devices, contact parts for supplying an AC current to the boiling-over detection parts, and contact parts for connecting the contact parts and one-side ends of the boiling-over detection parts to each other, respectively, an electrode-use capacitance detection device for detecting changes in capacitance of the boiling-over detection parts, and a control device for controlling the heating devices based on changes in capacitance detected by the electrode-use capacitance detection device. The contact parts are provided at positions farther from the heating devices and on a more front side of the cooking device than the boiling-over detection parts, and the connection parts run through on the outer peripheral side of the boiling-over detection parts.

Cooking device with electrodes in a lower face of the top plate

The cooking device includes a top plate on which containers are to be placed, heating devices provided under the top plate, electrodes provided on a lower surface of the top plate, capacitance detection devices for detecting changes in capacitance of the electrodes, and a boil over determination device for determining a liquid boiled over from the containers on the basis of the changes in capacitance detected by the capacitance detection devices in heating operations of the heating devices. The electrodes have a plurality of arc-shaped detection parts provided along periphery of each of the heating devices.

Growing community of inventors

Hyogo, Japan

Kohei Kawata