JP4998128B2 - Induction heating cooker and pot for induction heating cooker - Google Patents

Induction heating cooker and pot for induction heating cooker Download PDF

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JP4998128B2
JP4998128B2 JP2007194179A JP2007194179A JP4998128B2 JP 4998128 B2 JP4998128 B2 JP 4998128B2 JP 2007194179 A JP2007194179 A JP 2007194179A JP 2007194179 A JP2007194179 A JP 2007194179A JP 4998128 B2 JP4998128 B2 JP 4998128B2
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infrared sensor
induction heating
infrared
heating
pot
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JP2009032478A (en
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恵 椿
寛 砂金
泰史 森本
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/07—Heating plates with temperature control means

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Induction Heating Cooking Devices (AREA)
  • Cookers (AREA)

Description

本発明は、調理容器を誘導加熱するとともに赤外線センサを用いて調理容器の温度を制御する誘導加熱調理器およびその誘導加熱調理器用鍋に関する。   The present invention relates to an induction heating cooker that induction-heats a cooking container and controls the temperature of the cooking container using an infrared sensor, and a pan for the induction heating cooker.

近年、火を使わない調理器として誘導加熱調理器が広く普及している。   In recent years, induction cooking devices have been widely used as cooking devices that do not use fire.

この誘導加熱調理器は、加熱コイルの下方に赤外線センサを配置し、赤外線センサからの出力に応じて制御手段によりインバータ回路を制御して加熱コイルの出力を制御している（例えば、特許文献１参照）。   In this induction heating cooker, an infrared sensor is disposed below the heating coil, and the output of the heating coil is controlled by controlling the inverter circuit by the control means according to the output from the infrared sensor (for example, Patent Document 1). reference).

また、近年では、鍋底に銀を用いた発熱体を有することで誘導加熱調理器においても加熱が可能とした土鍋も開発されている（例えば、特許文献２参照）。
特開２００５−３８６６０号公報 特開２００５−３３４３５１号公報 In recent years, earthenware pots have also been developed that have a heating element using silver at the bottom of the pot so that they can also be heated in induction heating cookers (see, for example, Patent Document 2).
JP 2005-38660 A JP 2005-334351 A

しかしながら、上記構成の誘導加熱調理器およびその誘導加熱調理器用鍋において、銀を用いた発熱体による土鍋を高い入力で加熱すると、発熱体の温度が高温となるため、輻射熱により誘導加熱調理器内部の加熱コイルの温度が上昇し、本体の故障や不具合が発生するという問題を有していた。このため、これまでこのような鍋については、取り扱い説明書でユーザーが使用する際の入力を制限しているものが多いが、容易に誤って高い入力を加えてしまう危険性があるという問題も有していた。   However, in the induction heating cooker having the above-described configuration and the pot for the induction heating cooker, when a clay pot made of silver is heated at a high input, the temperature of the heating element becomes high. As a result, the temperature of the heating coil rises, and there is a problem that the main body breaks down or malfunctions. For this reason, until now, many of these pans have limited input when the user uses them in the instruction manual, but there is also a problem that there is a risk of easily adding a high input by mistake. Had.

本発明は、従来技術の有するこのような問題点に鑑みてなされたものであり、銀転写方式の土鍋を赤外線センサによる制御を行う誘導加熱調理器にて使用した場合に、どのような火力設定にしても誘導加熱調理器本体に不具合を与えない入力となるようにした、安全な誘導加熱調理器およびその誘導加熱調理器用鍋（土鍋）を提供することを目的としている。   The present invention has been made in view of such problems of the prior art, and what kind of heating power setting is used when a silver transfer clay pot is used in an induction heating cooker that is controlled by an infrared sensor. However, it is an object of the present invention to provide a safe induction heating cooker and a pot for the induction heating cooker (earthen pot) that are designed to provide input that does not cause problems in the induction heating cooker body.

上記目的を達成するために、本発明の誘導加熱調理器およびその誘導加熱調理器用鍋は、外郭を構成する本体と、前記本体の上部に取り付けられ調理容器を載置し前記調理容器から放射される赤外線を透過する赤外線入射領域を有するトッププレートと、前記トッププレートの下方に設けられ誘導磁界を発生させて前記調理容器を加熱する加熱コイルと、前記トッププレートの下方に設けられ前記調理容器から放射される赤外線を検出する赤外線センサと、前記赤外線入射領域の下方に設けられ前記調理容器から放射されるとともに前記赤外線入射領域から入射された赤外線を前記赤外線センサに導く導光筒と、前記赤外線センサの出力信号に基づいて前記加熱コイルの出力を前記赤外線センサの出力信号が一定となるよう制御する制御手段と、底に凸状の脚を持つ前記調理容器である土鍋とを備え、前記赤外線センサは、前記加熱コイルの内縁部の径方向で前記加熱コイルの中心とは異なる位置に配置され、かつ、前記土鍋は、鍋底に電磁誘導加熱による加熱を可能とする銀を用いた発熱体を有し、前記加熱コイルの中心の直上に前記土鍋の前記発熱体の中心が位置するように載置したときに、前記赤外線センサの直上に位置する部分の銀量を他の部分より多くなるようにすることで、前記赤外線センサの直上に位置する部分が他の部分よりも高い温度となるように構成したものである。 In order to achieve the above object, an induction heating cooker and a pan for an induction heating cooker according to the present invention are radiated from a main body constituting an outer shell and a cooking container mounted on an upper portion of the main body and mounted on the main body. A top plate having an infrared incident region that transmits infrared rays, a heating coil that is provided below the top plate and generates an induction magnetic field to heat the cooking vessel, and a cooking coil that is provided below the top plate and is provided from the cooking vessel. An infrared sensor for detecting the emitted infrared light, a light guide tube provided below the infrared incident area and radiated from the cooking container and guiding the infrared light incident from the infrared incident area to the infrared sensor, and the infrared light Control means for controlling the output of the heating coil so that the output signal of the infrared sensor becomes constant based on the output signal of the sensor , And a pot di previous SL cooking vessel convex feet on the bottom, the infrared sensor is disposed at a position different from the center of the heating coil in the radial direction of the inner edge of the heating coil, and The earthenware pot has a heating element using silver that enables heating by electromagnetic induction heating at the bottom of the pot, and is placed so that the center of the heating element of the earthenware pot is located immediately above the center of the heating coil. Sometimes, the portion located immediately above the infrared sensor has a higher amount of silver than the other portions, so that the portion located directly above the infrared sensor has a higher temperature than the other portions. It is a thing.

このことにより、土鍋をコイルの中心の直上に前記土鍋の発熱体の中心が位置するように載置して加熱したときに、赤外線センサ位置の鍋底温度に多くの電流が流れて高い温度となる。土鍋には脚が設けられてトッププレートと鍋底の発熱体との距離を設け、熱伝達による誘導加熱調理器の温度上昇を防いでいるが、赤外線センサによって鍋底の温度を検知しているため、鍋底とトッププレートの距離に影響を受けることなく鍋底温度の変化を赤外線センサへの入力へ反映させることができる。よって、赤外線センサの直上の鍋底の温度上昇により、赤外線センサの入力は大きくなる。制御手段は赤外線センサへの入力を一定とするように制御するため、加熱コイルへの入力を抑制する。そのとき、赤外線センサ直上部以外の鍋底温度は赤外線センサ直上部よりも低い値となるため、鍋底全体からの輻射熱を減少させることとなり、よって加熱コイルの温度上昇が抑えられ、加熱コイルの焼きつきなど誘導加熱調理器本体の故障や不具合を防ぐことができる。   As a result, when the earthenware pot is placed and heated so that the center of the heating element of the earthenware pot is located directly above the center of the coil, a large amount of current flows through the pot bottom temperature at the infrared sensor position, resulting in a high temperature. . The earthenware pan is provided with legs to provide a distance between the top plate and the heating element at the bottom of the pan to prevent the temperature rise of the induction heating cooker due to heat transfer, but the infrared sensor detects the temperature of the pan bottom, Changes in the bottom temperature can be reflected in the input to the infrared sensor without being affected by the distance between the bottom and the top plate. Therefore, the input of the infrared sensor increases due to the temperature rise at the bottom of the pan immediately above the infrared sensor. Since the control means controls the input to the infrared sensor to be constant, the input to the heating coil is suppressed. At that time, the temperature at the bottom of the pan other than directly above the infrared sensor is lower than that directly above the infrared sensor, so that the radiant heat from the entire pan bottom is reduced, and thus the temperature rise of the heating coil is suppressed, and the heating coil is burned. It is possible to prevent failures and malfunctions of the induction heating cooker body.

本発明の誘導加熱調理器およびその誘導加熱調理器用鍋によれば、銀を用いた発熱体による鍋を誘導加熱調理器にて高入力設定で加熱した場合に、赤外線センサの直上の温度を高くして赤外線センサの入力を大きくすることで、制御手段によりコイルの出力を抑制させ鍋底全体としての輻射熱を減少させて、加熱コイルの温度上昇を抑え、加熱コイルの焼きつきなど誘導加熱調理器本体の故障や不具合を防ぐことができる。   According to the induction heating cooker and the pan for the induction heating cooker of the present invention, when a pan made of a heating element using silver is heated with an induction heating cooker at a high input setting, the temperature directly above the infrared sensor is increased. And by increasing the input of the infrared sensor, the control means suppresses the coil output and reduces the radiant heat of the entire pan bottom, suppresses the temperature rise of the heating coil, and induction heating cooker body such as heating coil seizure Can prevent malfunctions and malfunctions.

第１の発明は、外郭を構成する本体と、前記本体の上部に取り付けられ調理容器を載置し前記調理容器から放射される赤外線を透過する赤外線入射領域を有するトッププレートと、前記トッププレートの下方に設けられ誘導磁界を発生させて前記調理容器を加熱する加熱コイルと、前記トッププレートの下方に設けられ前記調理容器から放射される赤外線を検出する赤外線センサと、前記赤外線入射領域の下方に設けられ前記調理容器から放射されるとともに前記赤外線入射領域から入射された赤外線を前記赤外線センサに導く導光筒と、前記赤外線センサの出力信号に基づいて前記加熱コイルの出力を前記赤外線センサの出力信号が一定となるよう制御する制御手段と、底に凸状の脚を持つ前記調理容器である土鍋とを備え、前記赤外線センサは、前記加熱コイルの内縁部の径方向で前記加熱コイルの中心とは異なる位置に配置され、かつ、前記土鍋は、鍋底に電磁誘導加熱による加熱を可能とする銀を用いた発熱体を有し、前記加熱コイルの中心の直上に前記土鍋の前記発熱体の中心が位置するように載置したときに、前記赤外線センサの直上に位置する部分の銀量を他の部分より多くなるようにすることで、前記赤外線センサの直上に位置する部分が他の部分よりも高い温度となるようにしたことにより、銀を用いた発熱体による鍋を誘導加熱調理器にて高入力設定で加熱した場合に、赤外線センサの直上の温度を高くして赤外線センサの入力を大きくすることで、制御手段によりコイルの出力を抑制させ鍋底全体としての輻射熱を減少させて、加熱コイルの温度上昇を抑え、加熱コイルの焼きつきなど誘導加熱調理器本体の故障や不具合を防ぐことができる。 A first invention includes a main body that constitutes an outer shell, a top plate that is attached to an upper portion of the main body and that has an infrared incident region on which a cooking container is placed and which transmits infrared rays radiated from the cooking container, and the top plate A heating coil provided below to generate an induction magnetic field to heat the cooking vessel, an infrared sensor provided below the top plate to detect infrared radiation emitted from the cooking vessel, and below the infrared incident region A light guide tube that is radiated from the cooking container and guides infrared light incident from the infrared light incident area to the infrared sensor; and an output of the heating coil based on an output signal of the infrared sensor. and a control means for controlling so that the signal is constant, the pot is a lifting previous SL cooking vessel convex feet on the bottom, the infrared cell Sa is the be in the radial direction of the inner edge of the heating coil is arranged at a position different from the center of the heating coil, and said pot is a heating element using silver to allow heating by electromagnetic induction heating pan bottom a, wherein when the center of the heating element of the pot directly above the center of the heating coil is placed so as to be positioned, so as to be greater than the amount of silver and the other part of the portion located directly above the infrared sensor By making the part located immediately above the infrared sensor at a higher temperature than the other parts, the pan made of a silver heating element is heated with an induction heating cooker at a high input setting. In this case, by increasing the temperature of the infrared sensor by increasing the temperature directly above the infrared sensor, the control means suppresses the coil output and reduces the radiant heat of the entire pan bottom, thereby suppressing the temperature rise of the heating coil. It is possible to prevent failure or malfunction of the induction heating cooking device body including seizure of the heating coil.

第２の発明は、特に、第１の発明において、赤外線センサの直上に位置する部分の銀量を多くなる構成を、前記赤外線センサの直上に位置する部分の発熱体の厚みを他の部分より厚くする構成とすることにより、銀を用いた発熱体による鍋を誘導加熱調理器にて高入力設定で加熱した場合に、赤外線センサの直上の温度を高くして赤外線センサの入力を大きくすることで、制御手段によりコイルの出力を抑制させ鍋底全体としての輻射熱を減少させて、加熱コイルの温度上昇を抑え、加熱コイルの焼きつきなど誘導加熱調理器本体の故障や不具合を防ぐことができる。   According to a second aspect of the present invention, in particular, in the first aspect of the invention, the silver amount in the portion located immediately above the infrared sensor is increased, and the thickness of the heating element in the portion located directly above the infrared sensor is set to be different from that in the other portions. By making the structure thicker, when the pan with a silver heating element is heated with an induction heating cooker at a high input setting, the temperature directly above the infrared sensor is increased to increase the input of the infrared sensor. Therefore, the output of the coil can be suppressed by the control means to reduce the radiant heat as the whole pan bottom, the temperature rise of the heating coil can be suppressed, and the failure or malfunction of the induction heating cooker body such as the burning of the heating coil can be prevented.

第３の発明は、特に、第１または第２の発明において、土鍋の脚を環状に連続的に形成した構成とすることにより、鍋底の空間に外乱光が入るのを防ぎ、赤外線センサにより鍋底温度を安定して正確に検知することができる。   According to a third aspect of the invention, in particular, in the first or second aspect of the invention, the structure is such that the legs of the earthenware pot are continuously formed in an annular shape, thereby preventing ambient light from entering the space at the bottom of the pot, and using an infrared sensor to Temperature can be detected stably and accurately.

以下、本発明の実施の形態について、図面を参照しながら説明する。なお、この実施の形態によって本発明が限定されるものではない。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

（実施の形態１）
図１に、本発明の第１の実施の形態の誘導加熱調理器Ｃの概略断面図を示す。 (Embodiment 1)
In FIG. 1, the schematic sectional drawing of the induction heating cooking appliance C of the 1st Embodiment of this invention is shown.

図１に示されるように、本発明にかかる誘導加熱調理器Ｃは、外郭を構成する本体２と、本体２の上部に取り付けられ専用の土鍋Ｐを含む調理用鍋が載置されるトッププレート４と、トッププレート４の下方に設けられ高周波磁界を発生させる加熱コイル６とを備えている。   As shown in FIG. 1, an induction heating cooker C according to the present invention includes a main plate 2 that constitutes an outer shell, and a top plate on which a cooking pan that is attached to the upper portion of the main unit 2 and includes a dedicated clay pot P is placed. 4 and a heating coil 6 provided below the top plate 4 and generating a high-frequency magnetic field.

トッププレート４は光を透過する非磁性体であり、その裏面に加熱コイル６に対応して印刷膜を円形に形成することにより土鍋Ｐを含む調理用鍋を載置するための加熱部が表示されており、印刷膜の外側（下面）には、光透過率が約ゼロの黒色の遮光層（図示せず）が印刷により形成されている。トッププレート４の少なくとも一部には、赤外線を透過する赤外線入射領域４ａが形成されている。本実施の形態において、赤外線入射領域４ａは、加熱コイル６の内縁部の径方向内側で加熱コイル６の中心とは異なる部位にトッププレート４に対向するように設けられている。赤外線入射領域４ａに対向する印刷膜及び遮光層の一部には円形抜き部が形成されている。   The top plate 4 is a non-magnetic material that transmits light, and a heating unit for placing the cooking pan including the earthenware pan P is formed by forming a printed film in a circular shape on the back surface corresponding to the heating coil 6. A black light shielding layer (not shown) having a light transmittance of about zero is formed by printing on the outer side (lower surface) of the printed film. At least a part of the top plate 4 is formed with an infrared incident region 4a that transmits infrared rays. In the present embodiment, the infrared incident region 4 a is provided so as to face the top plate 4 at a portion different from the center of the heating coil 6 on the radially inner side of the inner edge of the heating coil 6. A circular punched portion is formed in a part of the printed film and the light shielding layer facing the infrared incident region 4a.

加熱コイル６は樹脂等で形成されたコイルベース８に載置されるとともに、放射状に延び所定の間隔で形成された複数のコイルホルダ（図示せず）により保持されており、コイルベース８の下方には、加熱コイル６の中心から手前側に位置する土鍋Ｐを含む調理用鍋の底部の温度を検知する赤外線センサ１０とトッププレート４に向かって光を出射する発光体１１とが設けられる。赤外線センサ１０と発光体１１は基板（印刷配線板）１２上に設置されている。   The heating coil 6 is mounted on a coil base 8 made of resin or the like, and is held by a plurality of coil holders (not shown) extending radially and formed at predetermined intervals. Are provided with an infrared sensor 10 for detecting the temperature of the bottom of the cooking pan including the earthenware pan P located on the near side from the center of the heating coil 6 and a light emitter 11 for emitting light toward the top plate 4. The infrared sensor 10 and the light emitter 11 are installed on a substrate (printed wiring board) 12.

赤外線センサ１０は、赤外線入射領域４ａの真下、すなわち、加熱コイル６の内縁部の径方向内側で加熱コイル６の中心とは異なる部位にトッププレート４に対向するように設けられている。   The infrared sensor 10 is provided so as to face the top plate 4 directly below the infrared incident region 4 a, that is, at a radially inner side of the inner edge portion of the heating coil 6 and different from the center of the heating coil 6.

赤外線センサ１０の上方には可視光の透過を抑制するための平板状のフィルタ１４が設けられるとともに、赤外線センサ１０の周囲にも可視光の透過を抑制するための側壁１６が設けられている。フィルタ１４は、赤外線センサ１０の周囲を囲繞する側壁１６を介して基板１２上の赤外線センサ１０を覆うように基板１２上に取り付けられており、赤外線センサ１０の真上に位置するフィルタ１４には赤外線センサ１０の視野を絞るレンズ１８が一体的に形成されている。   A flat plate-like filter 14 for suppressing the transmission of visible light is provided above the infrared sensor 10, and a side wall 16 for suppressing the transmission of visible light is also provided around the infrared sensor 10. The filter 14 is mounted on the substrate 12 so as to cover the infrared sensor 10 on the substrate 12 via the side wall 16 surrounding the infrared sensor 10, and the filter 14 positioned directly above the infrared sensor 10 includes A lens 18 for narrowing the visual field of the infrared sensor 10 is integrally formed.

なお、加熱コイル６を内コイルと外コイルの分割巻き構成とし、赤外線センサ１０を加熱コイル６の外縁部の内側で、内コイルと外コイルとの間の直下に配置することもできる。   In addition, the heating coil 6 can be configured to have a split winding configuration of an inner coil and an outer coil, and the infrared sensor 10 can be disposed directly under the inner edge of the heating coil 6 and between the inner coil and the outer coil.

基板１２上には赤外線センサ１０からの出力信号を増幅する増幅器（図示せず）等も設けられ、赤外線センサ１０からの出力信号は増幅器で増幅されて、コネクタ２０に接続されたリード線２２を介して制御手段２４に入力される。   An amplifier (not shown) for amplifying the output signal from the infrared sensor 10 is provided on the substrate 12, and the output signal from the infrared sensor 10 is amplified by the amplifier to connect the lead wire 22 connected to the connector 20. To the control means 24.

赤外線センサ１０と発光体１１を載置する基板１２は遮光性を有する材料で形成されたケース２６に収容されており、ケース２６の上面における赤外線センサ１０に対向する部分には、導光筒５６の下部をケース２６内に挿入すると共に、土鍋Ｐを含む調理用鍋から放射された赤外線を通過させるための開口部２６ａが形成されている。   The substrate 12 on which the infrared sensor 10 and the light emitter 11 are placed is housed in a case 26 formed of a light-shielding material. A light guide tube 56 is provided on the upper surface of the case 26 so as to face the infrared sensor 10. The opening 26a for allowing the infrared rays radiated from the cooking pan including the earthenware pan P to pass therethrough is formed.

制御手段２４の前方には加熱調理器Ｃを操作する操作パネル２８が設けられている。操作パネル２８を操作して加熱操作が指示されると、赤外線センサ１０からの出力信号は増幅器により増幅され、増幅された出力に基づいて制御手段２４は加熱コイル６に高周波電力を供給するインバータ電源３０を制御し、土鍋Ｐやその他の鍋の温度を所定の温度に調節する。   An operation panel 28 for operating the heating cooker C is provided in front of the control means 24. When a heating operation is instructed by operating the operation panel 28, an output signal from the infrared sensor 10 is amplified by an amplifier, and the control means 24 supplies high frequency power to the heating coil 6 based on the amplified output. 30 is controlled and the temperature of the earthenware pot P and other pots is adjusted to predetermined | prescribed temperature.

図３および図４に、本発明にかかる土鍋Ｐの底面斜視図及び断面図を示す。図３または図４に示されるように、本発明にかかる土鍋Ｐは、鍋底面５８の外周に凸状で環状に連続的に形成された脚６０を有し、その内側の印刷部に銀とガラスの混合物からなる発熱体６２が転写方式により３層に印刷されている。印刷部の範囲は該加熱コイル６に対応する大きさとしている。発熱体６２の１層の厚みは約１０μｍ〜３０μｍであり、適宜得たい加熱出力や面積などにより変更できる。発熱体６２の１層目は印刷部のほぼ全面に印刷され、２版目および３版目は、誘導加熱調理器Ｃのコイル中心から赤外線センサ１０までの距離を半径とした円に対し中心側と脚側に一定の幅をもつ環状とする。こうすることで、赤外線センサ１０の直上において発熱体が３重となるドーナツ状の発熱層６２ａが設けられる。   3 and 4 are a bottom perspective view and a cross-sectional view of a clay pot P according to the present invention. As shown in FIG. 3 or 4, the earthenware pot P according to the present invention has legs 60 that are continuously formed in an annular shape in a convex shape on the outer periphery of the bottom surface 58 of the pot. A heating element 62 made of a glass mixture is printed in three layers by a transfer method. The range of the printing part is set to a size corresponding to the heating coil 6. The thickness of one layer of the heating element 62 is about 10 μm to 30 μm, and can be changed depending on the heating output and area to be obtained as appropriate. The first layer of the heating element 62 is printed on almost the entire surface of the printing unit, and the second and third plates are centered with respect to a circle whose radius is the distance from the coil center of the induction heating cooker C to the infrared sensor 10. And a ring with a certain width on the leg side. By doing so, a donut-shaped heat generating layer 62a in which the heat generating elements are tripled is provided immediately above the infrared sensor 10.

このような構成とすることで、赤外線センサ１０の直上の発熱体を厚くすることで銀量を多くし、その他の部分の発熱体を薄くすることで銀量を少なくすることができる。   With such a configuration, the amount of silver can be increased by increasing the thickness of the heating element immediately above the infrared sensor 10, and the amount of silver can be decreased by reducing the thickness of the heating elements in other portions.

［誘導加熱調理器の動作］
以上のように構成された誘導加熱調理器Ｃと土鍋Ｐについて、以下その動作、作用を説明する。 [Operation of induction heating cooker]
About the induction heating cooking appliance C and the earthenware pan P comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

水と食材を土鍋Ｐに入れて誘導加熱調理器Ｃで調理するに際し、土鍋Ｐを加熱部の中央に載置して誘導加熱調理器Ｃの電源スイッチ（図示せず）を投入すると、操作部パネル２８に設けられた切入りキー（図示せず）を操作することで加熱動作が開始可能な状態となるので、赤外線センサ１０が土鍋Ｐの底面の発熱体６２から放射される赤外線を受光する。   When water and ingredients are put in the earthenware pot P and cooked in the induction heating cooker C, the earthenware pot P is placed in the center of the heating unit and the power switch (not shown) of the induction heating cooker C is turned on. Since the heating operation can be started by operating a cut-off key (not shown) provided on the panel 28, the infrared sensor 10 receives infrared rays emitted from the heating element 62 on the bottom surface of the clay pot P. .

操作パネル２８に設けられた切入りキー（図示せず）が操作されることで加熱動作が開始されると、制御手段２４はインバータ電源３０を介して加熱コイル６に高周波電力を供給する。加熱コイル６に高周波電力が供給されると、加熱コイル６は誘導磁界を発生し、土鍋Ｐの底面の発熱体６２は誘導加熱によって温度が上昇する。土鍋Ｐの発熱体温度が上昇すると、ステファン・ボルツマンの法則に示されるように、発熱体は一般にその絶対温度の４剰に比例した赤外線エネルギーを放射する。発熱体６２から放射された赤外線は、赤外線入射領域４ａと導光筒４２を通過し、赤外線センサ１０を覆うように設けられたフィルタ１４を透過して赤外線センサ１０に到達する。   When a heating operation is started by operating a cut-off key (not shown) provided on the operation panel 28, the control unit 24 supplies high-frequency power to the heating coil 6 through the inverter power supply 30. When high-frequency power is supplied to the heating coil 6, the heating coil 6 generates an induction magnetic field, and the temperature of the heating element 62 on the bottom surface of the earthenware pot P rises due to induction heating. When the temperature of the heating element of the earthenware pot P rises, the heating element generally emits infrared energy proportional to a quadruple of its absolute temperature, as shown by Stefan-Boltzmann's law. The infrared rays emitted from the heating element 62 pass through the infrared incident region 4 a and the light guide tube 42, pass through the filter 14 provided so as to cover the infrared sensor 10, and reach the infrared sensor 10.

発熱体６２の温度が高くなると、赤外線エネルギーを受けた赤外線センサ１０の出力信号は高くなり、上述したように、この出力信号は増幅器により増幅される。制御手段２４は、この増幅された出力があらかじめ設定された所定の値になるようにインバータ電源３０から出力される高周波電力のＯＮ／ＯＦＦあるいは強弱を調節する。   When the temperature of the heating element 62 increases, the output signal of the infrared sensor 10 receiving the infrared energy increases, and as described above, this output signal is amplified by the amplifier. The control means 24 adjusts ON / OFF or strength of the high-frequency power output from the inverter power supply 30 so that the amplified output becomes a predetermined value set in advance.

ここで、土鍋Ｐの発熱体６２は赤外線センサ１０直上の発熱層６２ａで厚みが増すようにできており、すなわちその部分により電流が流れるために温度が高くなるようになっている。土鍋Ｐには環状に連続的に形成された脚６０が設けられてトッププレート４と鍋底の発熱体６２との距離を設け、熱伝達による誘導加熱調理器の温度上昇を防いでいるが、赤外線センサ１０によって鍋底の温度を検知しているため、鍋底とトッププレートの距離に影響を受けることなく鍋底温度の変化を赤外線センサ１０への入力へ反映させることができる。   Here, the heating element 62 of the earthenware pan P is formed so that the thickness is increased by the heating layer 62a immediately above the infrared sensor 10, that is, the temperature is increased because current flows through that portion. The earthenware pan P is provided with legs 60 formed continuously in an annular shape to provide a distance between the top plate 4 and the heating element 62 at the bottom of the pan to prevent the temperature rise of the induction heating cooker due to heat transfer. Since the temperature of the pan bottom is detected by the sensor 10, the change in the pan bottom temperature can be reflected in the input to the infrared sensor 10 without being affected by the distance between the pan bottom and the top plate.

また、脚６０が環状に連続的に形成されていることにより、赤外センサ１０に外乱光が入るのを防ぎ、鍋底の温度変化をより安定して正確に検知できる。   Further, since the legs 60 are continuously formed in an annular shape, it is possible to prevent disturbance light from entering the infrared sensor 10 and to detect the temperature change of the pan bottom more stably and accurately.

よって、赤外線センサ１０直上の発熱層６２ａの温度上昇により、赤外線センサ１０の入力は大きくなる。赤外線センサ１０にて検知する赤外線エネルギーがあらかじめ設定された所定の値となるようにインバータ電源３０から出力される高周波電力を調整して加熱コイル６への入力を抑制すると、発熱層６２ａ以外の範囲は温度が低くなり、鍋底からの輻射熱が全体として減少する。このため、輻射による加熱コイル６の温度上昇が抑えられる。   Therefore, the input of the infrared sensor 10 increases due to the temperature rise of the heat generating layer 62a immediately above the infrared sensor 10. When the high frequency power output from the inverter power supply 30 is adjusted so that the infrared energy detected by the infrared sensor 10 becomes a predetermined value set in advance, and the input to the heating coil 6 is suppressed, the range other than the heat generation layer 62a The temperature becomes lower and the radiant heat from the bottom of the pan decreases as a whole. For this reason, the temperature rise of the heating coil 6 by radiation is suppressed.

このように、本実施の形態によれば、赤外線センサ１０直上の発熱層６２ａの厚みを増やすことで、発熱層６２ａ以外の発熱体の温度がより低い値となるため、鍋底全体としての輻射熱は減少し、よって加熱コイル６の温度上昇が抑えられ、加熱コイル６の焼きつきなど誘導加熱調理器Ｃ本体の故障や不具合を防ぐことができる。   Thus, according to the present embodiment, by increasing the thickness of the heat generating layer 62a immediately above the infrared sensor 10, the temperature of the heat generating elements other than the heat generating layer 62a becomes a lower value, so the radiant heat as the whole pan bottom is Therefore, the temperature rise of the heating coil 6 can be suppressed, and a failure or malfunction of the induction heating cooker C main body such as seizure of the heating coil 6 can be prevented.

なお、本実施の形態では、赤外線センサ真上の発熱層６２ａの厚み、すなわち、銀の厚みを厚くして他の部分より銀量を多くしたが、厚みは他の部分と同じで、赤外線センサ真上の発熱体の銀の密度を他の部分より高くして銀量を多くしても同様の効果が得られる。   In the present embodiment, the thickness of the heat generating layer 62a directly above the infrared sensor, that is, the silver thickness is increased to increase the amount of silver, but the thickness is the same as the other parts. The same effect can be obtained by increasing the silver amount by increasing the silver density of the heating element directly above that of the other portions.

また、温度の高くなる範囲を環状とすることで、トッププレート４に印刷された加熱部内に鍋があれば、鍋の向きに依らず効果を得ることができる。   Moreover, if the range where temperature rises is made into a ring, if there is a pan in the heating part printed on the top plate 4, the effect can be obtained regardless of the direction of the pan.

なお、赤外線センサ１０の位置がコイルにおいて磁束密度が最大となる位置にない場合でも、本発明は効果を得ることができる。   Even when the position of the infrared sensor 10 is not at the position where the magnetic flux density is maximum in the coil, the present invention can obtain the effect.

また、本実施の形態では発熱層６２ａを３層としたが、２層や４層でも、赤外線センサ１０直上の発熱層６２ａの銀量を他の部分より多くすることにより同様の効果が得られる。   In the present embodiment, the heat generating layer 62a is composed of three layers. However, in the case of two or four layers, the same effect can be obtained by increasing the amount of silver in the heat generating layer 62a immediately above the infrared sensor 10 as compared with other portions. .

本発明にかかる誘導加熱調理器およびその誘導加熱調理器用鍋は、銀を用いた発熱体を有する土鍋を加熱コイルの温度を上昇させることなく加熱できるので、土鍋で調理する、キッチン等に組み込まれる家庭用の誘導加熱調理器のほか、卓上用の誘導加熱調理器にも有用である。   The induction heating cooker and the pot for the induction heating cooker according to the present invention can be used to heat a clay pot having a heating element using silver without increasing the temperature of the heating coil. In addition to home induction heating cookers, it is also useful for desktop induction heating cookers.

本発明の実施の形態１における誘導加熱調理器およびその誘導加熱調理器用鍋の概略断面図Schematic sectional view of induction heating cooker and its induction heating cooker pan in Embodiment 1 of the present invention 本発明の実施の形態１における誘導加熱調理器に設けられたトッププレートの部分平面図The fragmentary top view of the top plate provided in the induction heating cooking appliance in Embodiment 1 of this invention 本発明の実施の形態１における誘導加熱調理器用鍋（土鍋）の底面斜視図The bottom perspective view of the pot for induction heating cookers (earthen pot) in Embodiment 1 of the present invention 本発明の実施の形態１における誘導加熱調理器用鍋（土鍋）の底面の断面図Sectional drawing of the bottom face of the pan for induction heating cookers (earthen pan) in Embodiment 1 of this invention

符号の説明Explanation of symbols

２ 本体
４ トッププレート
４ａ 赤外線入射領域
６ 加熱コイル
８ コイルベース
１０ 赤外線センサ
１１ 発光体
１２ 基板
１４ フィルタ
１６ 側壁
１８ レンズ
２０ コネクタ
２２ リード線
２４ 制御手段
２６ ケース
２６ａ 開口部
２８ 操作パネル
３０ インバータ電源
４２ 導光筒
５８ 鍋底面
６０ 脚
６２ 発熱体
６２ａ 発熱層
Ｃ 誘導加熱調理器
Ｐ 土鍋（誘導加熱調理器用鍋） 2 Body 4 Top plate 4a Infrared incident area 6 Heating coil 8 Coil base 10 Infrared sensor 11 Light emitter 12 Substrate 14 Filter 16 Side wall 18 Lens 20 Connector 22 Lead wire 24 Control means 26 Case 26a Opening 28 Operation panel 30 Inverter power supply 42 Conduction Light tube 58 Pan bottom 60 Leg 62 Heating element 62a Heating layer C Induction heating cooker P Earthenware pot (Induction heating cooker pot)

Claims (3)

外郭を構成する本体と、
前記本体の上部に取り付けられ調理容器を載置し前記調理容器から放射される赤外線を透過する赤外線入射領域を有するトッププレートと、
前記トッププレートの下方に設けられ誘導磁界を発生させて前記調理容器を加熱する加熱コイルと、
前記トッププレートの下方に設けられ前記調理容器から放射される赤外線を検出する赤外線センサと、
前記赤外線入射領域の下方に設けられ前記調理容器から放射されるとともに前記赤外線入射領域から入射された赤外線を前記赤外線センサに導く導光筒と、
前記赤外線センサの出力信号に基づいて前記加熱コイルの出力を前記赤外線センサの出力信号が一定となるよう制御する制御手段と、
底に凸状の脚を持つ前記調理容器である土鍋とを備え、
前記赤外線センサは、前記加熱コイルの内縁部の径方向で前記加熱コイルの中心とは異なる位置に配置され、かつ、前記土鍋は、鍋底に電磁誘導加熱による加熱を可能とする銀を用いた発熱体を有し、前記加熱コイルの中心の直上に前記土鍋の前記発熱体の中心が位置するように載置したときに、前記赤外線センサの直上に位置する部分の銀量を他の部分より多くなるようにすることで、
前記赤外線センサの直上に位置する部分が他の部分よりも高い温度となるようにした誘導加熱調理器およびその誘導加熱調理器用鍋。 A main body constituting the outer shell,
A top plate having an infrared incident region that is attached to the upper portion of the main body and that has a cooking vessel placed thereon and transmits infrared rays emitted from the cooking vessel;
A heating coil that is provided below the top plate and generates an induction magnetic field to heat the cooking vessel;
An infrared sensor that is provided below the top plate and detects infrared rays emitted from the cooking container;
A light guide tube that is provided below the infrared incident region and is radiated from the cooking container and guides infrared rays incident from the infrared incident region to the infrared sensor;
Control means for controlling the output of the heating coil based on the output signal of the infrared sensor so that the output signal of the infrared sensor is constant;
Bottom and a pot di previous SL cooking vessel convex leg,
The infrared sensor is disposed at a position different from the center of the heating coil in the radial direction of the inner edge of the heating coil, and the earthen pot generates heat using silver that enables heating by electromagnetic induction heating on the pot bottom And when placed so that the center of the heating element of the earthenware pan is located immediately above the center of the heating coil, the silver amount of the portion located immediately above the infrared sensor is larger than that of the other portions. By doing so,
An induction heating cooker in which a portion located immediately above the infrared sensor has a higher temperature than other portions, and a pan for the induction heating cooker. 前記赤外線センサの直上に位置する部分の銀量を多くなる構成を、前記赤外線センサの直上に位置する部分の発熱体の厚みを他の部分より厚くする構成とした請求項１に記載の誘導加熱調理器およびその誘導加熱調理器用鍋。 2. The induction heating according to claim 1, wherein the configuration in which the silver amount in a portion located immediately above the infrared sensor is increased is configured such that the thickness of the heating element in the portion located immediately above the infrared sensor is thicker than the other portions. Cooker and its induction heating cooker pan. 前記土鍋の脚を環状に連続的に形成した請求項１または２に記載の誘導加熱調理器用鍋。 The induction heating cooker pan according to claim 1 or 2, wherein the legs of the clay pot are continuously formed in an annular shape.
JP2007194179A 2007-07-26 2007-07-26 Induction heating cooker and pot for induction heating cooker Expired - Fee Related JP4998128B2 (en)

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CN112493831A (en) * 2020-12-18 2021-03-16 珠海格力电器股份有限公司 Rice cooker
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