Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Panasonic Communications Co., Ltd.

Naoaki Ishimaru

Akira Kataoka

Hajime Yamamoto

Makoto Nishimura

Tomoya Fujinami

Sunao Okuda

Izuo Hirota

Masafumi Sadahira

Takahiro Miyauchi

Nobuo Genji

Hiroshi Terada

Fumitaka Ogasawara

Akinori Toyoda

Tamotsu Izutani

Hiroshi Tominaga

Atsushi Fujita

Yoshihito Urata

Kiyoyoshi Takada

Masayo Haji

Tatsuo Nakatsugawa

Masakazu Naito

Hidekazu Yamashita

Yuichi Shimizu

Koji Niiyama

Takeshi Kitaizumi

Hirofumi Inui

Yoichi Kurose

Ryuta Kondo

Satoshi Furusawa

Katsunori Zaizen

A heating cooker includes heating chamber configured to house a food, through-hole formed in a wall surface of heating chamber, an imager configured to capture an image in heating chamber through through-hole, air blower configured to blow air on an outside of heating chamber, and wind guide configured to guide wind generated by air blower. Thus, wind guide is disposed so that the wind from air blower forms an air curtain passing through space between the imager and through-hole.

Heating cooker

In an induction heating apparatus, an infrared-ray detection portion includes an infrared-ray reception portion adapted to receive infrared rays radiated from an object to be heated, an amplification portion adapted to amplify a detection signal from the infrared-ray reception portion to form an infrared-ray detection signal, and a temperature detection portion adapted to detect the temperature of the infrared-ray detection portion and to output the temperature to the control portion. The control portion is adapted to correct the infrared-ray detection signal to form an infrared-ray real signal, when the temperature of the infrared-ray reception portion is equal to or higher than a temperature to be detected by the infrared-ray detection portion, based on information about a negative signal superimposed on the infrared-ray detection signal outputted from the infrared-ray detection portion, which is negative-signal information about the negative signal with the reverse polarity from that of the infrared-ray detection signal.

Induction heating apparatus

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 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 in which a size of heating coils can be freely set without being restricted by a size of an opening of a cabinet of a kitchen unit. The induction heating cooker has an outer casing including a flange extending in an outward direction from a top portion of a container receptacle, with a heating coil container space being provided between the flange and a plate, such that one portion of each of the heating coils is disposed in the heating coil container space.

Induction heating cooker and kitchen unit having the same

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.

Induction heating cooker

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 includes an infrared sensor for sensing an infrared intensity from a load pot, a waveguide for guiding infrared radiation from the load pot to the infrared sensor, a first magnetism-proofing unit and a second magnetism-proofing unit for reducing magnetic fluxes leaking from a heating coil. Placement of the waveguide at a position lower than an upper surface of the second magnetism-proofing unit reduces self-heating of the waveguide due to magnetic flux supplied from the heating coil. As a result, a temperature rise of the infrared sensor due to radiation heat from the waveguide can be reduced, and an accuracy of sensing a temperature by the infrared sensor can be improved.

An induction heating cooker includes a surface, a heating coil for inductionally-heating a load pan, an inverter for supplying a high-frequency current to the heating coil, an infrared detector which detects infrared radiation emitted from the load pan and is located under a top plate, a first temperature detector for detecting a temperature of the load pan based on an output of the infrared detector, a heating controller for controlling a power output from the inverter, a thermo-sensitive element for receiving heat from the top plate, and a second temperature detector for detecting a temperature of the load pan based on an output of the first thermo-sensitive element. This induction heating cooker detects a temperature change of the load pan accurately by detecting an infrared radiation from the load pan, and detects the temperature of the load pan by the heat conduction from the pan even if ambient light enters.

Induction cooking heater

The present invention offers an induction heating apparatus in which the infrared sensor performs stable temperature detection without undergoing the influence of leakage magnetic flux from the induction heating means. This induction heating apparatus has a main frame which forms an outer casing, a top plate provided on the upper side plane of the above-mentioned main frame and having at least one loading part on which a cooking container to be heated is placed, an induction heating means which is provided under the above-mentioned loading part and is to heat the above-mentioned cooking container to be heated, an infrared sensor which is provided in the neighborhood of the above-mentioned induction heating means and receives the infrared radiation radiated from the above-mentioned cooking container to be heated, and outputs the detected signal corresponding to the amount of the infrared radiation, a control board that detects the temperature of the above-mentioned cooking container to be heated based on the above-mentioned detected signal, and controls the output of the above-mentioned induction heating means, and a magneto-shielding member having a cylindrical body covering the periphery of the above-mentioned infrared sensor and a side part covering at least a part of the above-mentioned control board and being composed thereof in a single unitary body.

An image heating device comprises a cylindrical heating roller with a Curie temperature of 210&#xb0; C., a magnetization coil for magnetizing the heating roller with an alternating magnetic field, which is arranged inside the heating roller, and a nip portion for heating a recording material that carriers a toner image with heat from the heating roller, while the recording material is being conveyed along said nip portion. The ratio between the amount of heat generated in said heat-generating member at Curie temperature or higher to the amount of heat generated at room temperature in said heat-generating member is not more than &#xbd;. With this configuration, the heating roller can regulate its own temperature to stabilize at a temperature that is suitable for fixing, and the problems of partial overheating or underheating, unstable heat generation, or damage of the device can be eliminated.

Image heating device and image forming device using the same

A heating roller device which incorporates a metal roller having a curier temperature adjusted to an appropriate level and enabling a self-temperature-controllability and which has a structure that the metal roller is induction-heated by an induction heating section. A method of manufacturing the foregoing metal roller according to the present invention has a step of joining a pipe, which is made of temperature-sensitive magnetic metal, and the composition of which has been adjusted so as to have a predetermined curier temperature, and metal having a resistivity lower than that of the temperature-sensitive magnetic metal to each other by a drawing work in such a manner as to prevent formation of any gap. Thus, an induction heating pipe exhibiting an excellent heating characteristic is manufactured.

Heating roller device

An image heating device comprises a cylindrical heating roller with a Curie temperature of 210.degree. C., a magnetization coil for magnetizing the heating roller with an alternating magnetic field, which is arranged inside the heating roller, and a nip portion for heating a recording material that carries a toner image with heat from the heating roller, while the recording material is being conveyed along said nip portion. The ratio between the amount of heat generated in said heat-generating member at Curie temperature or higher to the amount of heat generated at room temperature in said heat-generating member is not more than 1/2. With this configuration, the heating roller can regulate its own temperature to stabilize at a temperature that is suitable for fixing, and the problems of partial overheating or underheating, unstable heat generation, or damage of the device can be eliminated.

Growing community of inventors

Shiga, Japan

Naoaki Ishimaru