Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Tomoya Fujinami

Naoaki Ishimaru

Kenji Watanabe

Akira Kataoka

Hiroshi Tominaga

Izuo Hirota

Masafumi Sadahira

Takahiro Miyauchi

Sunao Okuda

Fumitaka Ogasawara

Shintaro Noguchi

Masaharu Ohashi

Koji Yoshino

Tomotaka Nobue

Yoshiharu Omori

Makoto Nishimura

Keiko Isoda

Daisuke Hosokawa

Atsushi Fujita

Sadatoshi Tabuchi

Takeshi Kitaizumi

Yoichi Kurose

Hideo Tomita

Satoshi Furusawa

Katsunori Zaizen

A microwave heating device of the present invention comprises a heating chamber housing an object to be heated, a microwave generation portion generating a microwave, a waveguide portion propagating the microwave, and a plurality of microwave radiating portions radiating the microwave in the heating chamber, wherein the microwave radiating portions are arranged in a direction orthogonal to a direction of electric field and to a direction of propagation within the waveguide portion, and centers of the microwave radiating portions are arranged at positions corresponding to approximate node positions of the electric field within the waveguide portion. The microwave heating device is enabled to make uniform heat distribution in the object to be heated, without using a driving mechanism.

Microwave heating device

An induction heating device includes a top plate () on which a cooking container is placed, an infrared ray sensor () configured to detect an infrared ray radiated from the cooking container through the top plate, a heating coil () to which a high-frequency electric current is supplied to generate an induction magnetic field for heating the cooking container, a mounting plate () on which a member for supporting the heating coil is mounted, and a heating control unit () configured to control an electric power for heating the cooking container by controlling the high-frequency electric current supplied to the heating coil based on an amount of an energy of the infrared ray received by the infrared ray sensor. The infrared ray sensor is thermally connected to the mounting plate.

Induction heating device

Disclosed is an induction cooking device that is not likely to be affected by induction heating and wherein boiling-over can be detected. An induction cooking device has: a top plate on which a cooking container is placed; a heating coil that generates an induction magnetic field for heating the cooking container; a heating control unit that controls the heating power of the cooking container by controlling the high-frequency current supplied to the heating coil; electrodes disposed in a lower surface of the top plate; and an electrostatic capacity detector that detects changes in electrostatic capacity occurring in the electrodes when articles to be cooked contact with the top plate. When the electrostatic capacity detector senses changes in the electrostatic capacity of the electrodes, the heating control unit decreases or stops the heating power of the cooking container, and the electrodes are disposed outside of the outer circumference the heating coil.

Inductive heating apparatus

There is provided a heating/cooking equipment capable of accurately determining boiling over. The heating/cooking equipment includes: a top plate () connected to a reference potential; a heating unit () configured to heat an object to be heated placed on the top plate; an electrode () arranged under the top plate; a capacitance detecting unit () configured to detect the electrostatic capacitance of the electrode; a boiling over detecting unit () configured to detect whether or not a material to be cooked in the object to be heated has boiled over on the top plate, based on a value of the electrostatic capacitance detected by the capacitance detecting unit; and a control unit () configured to control the heating operation of the heating unit based on a boiling over detection result from the boiling over detecting unit. The capacitance detecting unit () detects a change in the electrostatic capacitance of the electrode by exploiting capacitive coupling between the electrode and the reference potential which is enhanced by increase in a boiled over amount of the material to be cooked with moisture contained in the material to be cooked functioning as a dielectric when the material to be cooked boils over on the top plate.

Heating/cooking equipment

The present invention provides an induction heating cooker, which is structured to cut off visible light being incident upon an infrared sensor, yet being capable of more accurately sensing any abnormality of the infrared sensor before heating is started. To this end, the induction heating cooker includes a sensor failure sensing-purpose light emitting portion that emits visible light for sensing any failure of an infrared sensor, a visible light cutting filter provided on a surface of a printed circuit board holding the infrared sensor so as to cover the field of view of the infrared sensor, and a control unit that limits the output of an inverter circuit supplying a high-frequency current to a heating coil when the output of the infrared sensor is equal to or less than a threshold value in a situation where the sensor failure sensing-purpose light emitting portion is lit up. The infrared sensor receives the visible light from the sensor failure sensing-purpose light emitting portion to irradiate inside the visible light cutting filter.

Induction heating cooker

The present invention provides an inductive heating cooking device capable of detecting a temperature of a bottom of a pan instantly without delay in detection of temperature, and precisely keeping a temperature of a cooking container constant, and control method thereof, and control program thereof. The inductive heating cooking device includes a top plate () on which a cooking container is placed, a heating coil () to which a high-frequency current is applied to generate an induction magnetic field for heating the cooking container, an input unit () configured to receive a command for keeping a temperature of the cooking container at a constant temperature, a control unit () configured to control a heating of the cooking container by controlling the high-frequency current to be applied to the heating coil, and an infrared ray sensor () configured to detect an infrared ray energy radiated from the cooking container through the top plate. The control unit () controls the high-frequency current to be applied to the heating coil based on an output of the infrared ray sensor so as to keep the temperature of the cooking container at the constant temperature according to the command received by the input unit.

Induction heating cooking device

An induction heating cooker includes: a top plate on which a cooking container is placed; a temperature measuring device which has an infrared ray sensor operable to detect infrared rays radiated from the cooking container and a temperature converting unit operable to calculate a temperature of the cooking container from an output of the infrared ray sensor; a heating coil operable to receive a supply of a high frequency current and generate an induction magnetic field for heating the cooking container; and a heating control unit operable to control the high frequency current of the heating coil based on the temperature measured by the temperature measuring device, and control heating power to be supplied to the cooking container. The temperature measuring device further includes a temperature detecting unit operable to measure a temperature of the infrared ray sensor, and calculate the temperature of the cooking container from an output of the infrared ray sensor based on the temperature of the infrared ray sensor measured by the temperature detecting unit.

An induction heating device includes a top plate, a thermo-sensitive device, a temperature detector, a coil, a controller, and a light-emitting section. The top plate places thereon a cooking utensil containing material to be cooked. The thermo-sensitive device changes its electrical characteristics with the temperature of the cooking utensil. The temperature detector detects the temperature of the cooking utensil based on the electrical characteristics of the thermo-sensitive device. The coil heats the cooking utensil. The controller controls the coil based on the temperature information of the temperature detector, thereby controlling an amount of the electric heating power to be supplied to the cooking utensil. The light-emitting section emits visible light to the area over the thermo-sensitive device. The light from the light-emitting section illuminates the area over the thermo-sensitive device through the top plate.

An induction heating cooker including a top plate where a pan is placed; a heating coil for induction heating the pan; an inverter circuit for supplying a high frequency current to the heating coil; an infrared sensor, which is arranged under the heating coil and detects an infrared light radiated from the pan; a light guiding part including an upper opening formed at an upper end facing the top plate and a lower opening formed at a lower end, and guiding the infrared light from the pan to the infrared sensor; and a control unit for controlling an output of the inverter circuit according to an output from the infrared sensor; wherein the light guiding part includes a nonmetallic material part in which the upper opening is formed upper than a lower surface of the heating coil.

An induction heating cooking device includes a heating coil () that induction-heats a cooking container, an infrared sensor () that detects infrared radiation which is emitted from a bottom surface of the cooking container and that outputs a detection signal based on the quantity of energy of the detected infrared radiation, and a heating control section () that controls supply of electric power to the heating coil based on the detection signal. When the temperature of the bottom surface of the cooking container is equal to or higher than a first predetermined temperature which is higher than 230 degrees C., the infrared sensor () outputs the detection signal, and when the bottom-surface temperature is lower than the first predetermined temperature, the infrared sensor () does not output the detection signal substantially.

An induction heating cooker includes a cooking container heating coil, an inverter circuit to supply high-frequency current to the heating coil, an infrared ray sensor to detect radiation from the container, an electric power integrating section to integrate heating electric power from the inverter circuit, and a heating control section to control an inverter circuit output. If the power integrating section has less than a predetermined value when an increase in the output of the infrared ray sensor has a first value after start of heating, the cooker shifts to a first heating control mode and, if equal to or more than the predetermined value, shifts to a second heating control mode. The power, in the first heating control mode, is reduced to a second amount of power lower than the first amount and, in the second heating control mode, is a third amount larger than the second amount.

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Shiga, Japan

Tomoya Fujinami