JP2010282861A - Induction heating cooker - Google Patents

Induction heating cooker Download PDF

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JP2010282861A
JP2010282861A JP2009135842A JP2009135842A JP2010282861A JP 2010282861 A JP2010282861 A JP 2010282861A JP 2009135842 A JP2009135842 A JP 2009135842A JP 2009135842 A JP2009135842 A JP 2009135842A JP 2010282861 A JP2010282861 A JP 2010282861A
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temperature
heating
pan
predetermined time
initial
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JP5218287B2 (en
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Yuji Yamamoto
祐史 山本
Kenji Watanabe
賢治 渡辺
Taizo Ogata
大象 緒方
Shintaro Noguchi
新太郎 野口
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Panasonic Corp
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Panasonic Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To improve cooking performance of an induction heating cooker by accurately detecting the initial pan bottom temperature when starting cooking, accurately detecting the initial pan bottom temperature independently of a temperature condition of a top plate, and effectively improving accuracy of the pan bottom temperature by changing the set temperature. <P>SOLUTION: An initial temperature determining means 9 for determining the initial temperature of a pan 1 based on output of a temperature detecting means 8 computes a first temperature rise value in a second prescribed time based on output of a temperature detecting means 8 per a first prescribed time after starting heating, and determines that the pan bottom temperature is higher than a prescribed temperature when the temperature rise value in the second prescribed time exceeds a prescribed value within a third prescribed time from starting of heating, and changes the first set temperature to be lowered, which is set by the temperature setting means 10 higher than a stable temperature of the pan bottom 1 when starting cooking so that the temperature of a cooked material housed in the pan 1 rises quickly. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は一般家庭で使用する赤外線センサを有する誘導加熱調理器において、加熱開始後、トッププレートの温度状態に関わらず初期鍋底温度を正確に検知して、温度設定手段によって設定された温度を変更することで最適な設定温度を与え、鍋底温度の温度精度向上を効果的に行う誘導加熱調理器に関する。   The present invention is an induction heating cooker having an infrared sensor used in a general home, and after the start of heating, the initial pan bottom temperature is accurately detected regardless of the temperature state of the top plate, and the temperature set by the temperature setting means is changed. The present invention relates to an induction heating cooker that gives an optimum set temperature and effectively improves the temperature accuracy of the pan bottom temperature.

図５は従来の誘導加熱調理器を示す構成図である。従来、鍋１４と、鍋１４の初期温度を検知する温度素子１６と、鍋１４を加熱する加熱部と、温度素子１６の検知温度に基づいて加熱部の制御方法を算出して制御する制御装置とを備えた誘導加熱調理器において、鍋１４内で天ぷら油などの油類を加熱する天ぷら調理の場合、制御装置は、加熱停止温度で加熱を停止し、加熱再開温度で加熱を再開する。そして、制御装置は、加熱開始時に温度素子１６の検出温度が所定温度より高いときは加熱再開温度と、加熱停止温度とを通常の値に設定してから加熱制御する。   FIG. 5 is a block diagram showing a conventional induction heating cooker. Conventionally, the pan 14, the temperature element 16 that detects the initial temperature of the pan 14, the heating unit that heats the pan 14, and the control device that calculates and controls the control method of the heating unit based on the detected temperature of the temperature element 16. In the case of tempura cooking that heats oil such as tempura oil in the pan 14, the control device stops heating at the heating stop temperature and restarts heating at the heating resumption temperature. When the temperature detected by the temperature element 16 is higher than the predetermined temperature at the start of heating, the control device controls the heating after setting the heating restart temperature and the heating stop temperature to normal values.

また、加熱開始時に前記温度素子の検出温度が所定温度より低いときは、加熱再開温度と、加熱停止温度とを通常値より高く設定してから加熱制御を開始する天ぷら調理の加熱制御方法を行っている。   In addition, when the detected temperature of the temperature element is lower than a predetermined temperature at the start of heating, a heating control method for tempura cooking is performed in which heating control is started after setting the heating restart temperature and the heating stop temperature higher than normal values. ing.

特開２００１−１６７８６６号公報JP 2001-167866 A

上記のような従来の誘導加熱調理器では、鍋１４の初期温度を検知する温度素子１６はトッププレート１５を介して鍋底温度検知をしている。例えば加熱開始時にトッププレート１５が所定温度より高い温度で鍋底が所定温度より低い温度であったとき、加熱開始時に温度素子１６はトッププレート１５からの赤外線放射の影響を受けるため鍋底温度は所定温度より低い温度であるにもかかわらず検出温度が所定温度より高いと認識してしまう。そして鍋底温度が所定温度より高い温度と認識されたまま加熱制御し、調理に最適な鍋底温度が得られない。これにより鍋１４内に収容された油も調理に最適な温度が得られない。   In the conventional induction heating cooker as described above, the temperature element 16 that detects the initial temperature of the pan 14 detects the pan bottom temperature via the top plate 15. For example, when the top plate 15 is higher than a predetermined temperature and the pan bottom is lower than a predetermined temperature at the start of heating, the temperature element 16 is affected by infrared radiation from the top plate 15 at the start of heating, so the pan bottom temperature is a predetermined temperature. Although the temperature is lower, it is recognized that the detected temperature is higher than the predetermined temperature. And heating control is performed while the pan bottom temperature is recognized as a temperature higher than the predetermined temperature, and the pan bottom temperature optimum for cooking cannot be obtained. As a result, the oil stored in the pan 14 cannot obtain the optimum temperature for cooking.

このように、従来の温度検知では初期鍋底温度検出が正確に行えないためにトッププレート１５の温度によって検知される初期鍋底温度が変化するといった課題を有していた。   Thus, in the conventional temperature detection, since the initial pan bottom temperature cannot be accurately detected, the initial pan bottom temperature detected by the temperature of the top plate 15 varies.

本発明は、前記従来の課題を解決するもので、加熱開始後、トッププレートの温度状態に関わらず鍋の初期鍋底温度を正確に検知して、温度設定手段によって設定された温度を適切に変更することで最適な設定温度を与え、鍋底温度の温度精度向上を効果的に行うことを可能とした誘導加熱調理器を提供することを目的としている。   The present invention solves the above-mentioned conventional problems, and after heating is started, the initial pan bottom temperature of the pan is accurately detected regardless of the temperature state of the top plate, and the temperature set by the temperature setting means is appropriately changed. An object of the present invention is to provide an induction heating cooker that can provide an optimum set temperature and effectively improve the temperature accuracy of the pan bottom temperature.

前記従来の課題を解決するために、本発明の誘導加熱調理器は、鍋を載置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前記鍋を誘導加熱する加熱手段と、前記トッププレートの下方に設けられ前記鍋底の温度を検知する赤外線センサによる温度検知手段と、前記温度検知手段の出力をもとに前記鍋の初期温度を判定する初期温度判定手段
と、前記鍋内に収容された調理物がすばやく上昇するように加熱開始時は前記鍋底の安定温度より高い第一の設定温度を設定し、前記第一の設定温度到達後は第一の設定温度より低い第二の設定温度を設定する温度設定手段と、前記温度検知手段が検知する温度が前記温度設定手段によって設定された設定温度となるように前記加熱手段の加熱出力を制御する制御手段とを備え、前記初期温度判定手段は、加熱開始後、第一の所定時間毎に前記温度検知手段の出力から第二の所定時間の第一の温度上昇値を算出し、加熱開始から第三の所定時間内に前記第二の所定時間の温度上昇値が所定の値を超えると鍋底温度が所定の温度よりも高い温度にあると判定し、前記温度設定手段に設定された前記第一の設定温度を低く変更するとしたものである。 In order to solve the conventional problem, an induction heating cooker according to the present invention includes a top plate on which a pan is placed, a heating unit provided below the top plate for induction heating the pan, and the top plate Temperature detection means by an infrared sensor that is provided below and detects the temperature of the pot bottom, initial temperature determination means for determining the initial temperature of the pot based on the output of the temperature detection means, and housed in the pot Set the first set temperature higher than the stable temperature of the pan bottom at the start of heating so that the food quickly rises, and after reaching the first set temperature, set the second set temperature lower than the first set temperature. A temperature setting means for setting, and a control means for controlling the heating output of the heating means so that the temperature detected by the temperature detection means becomes a set temperature set by the temperature setting means, The degree determination means calculates the first temperature rise value for the second predetermined time from the output of the temperature detection means at every first predetermined time after the start of heating, and within the third predetermined time from the start of heating. When the temperature rise value of the second predetermined time exceeds a predetermined value, it is determined that the pan bottom temperature is higher than the predetermined temperature, and the first set temperature set in the temperature setting means is changed to be low. It is a thing.

これによって、最適な設定温度を与え、鍋底温度の温度精度向上を効果的に行うものである。   As a result, the optimum set temperature is given, and the temperature accuracy of the pan bottom temperature is effectively improved.

本発明の誘導加熱調理器は、例えば加熱開始時にトッププレートが高温で鍋底温度が低温であったとき、加熱開始時に鍋内に収容された調理物の初期温度を判定する初期温度判定手段を備えているのでトッププレートの温度に影響を受けて赤外線センサの検出温度が所定温度より高いと誤った認識をしてしまうことがなく調理に最適な鍋底温度を十分に与えることができる。   The induction heating cooker of the present invention includes an initial temperature determination means for determining an initial temperature of the food stored in the pan at the start of heating, for example, when the top plate is hot and the bottom temperature is low at the start of heating. Therefore, if the detection temperature of the infrared sensor is higher than a predetermined temperature due to the influence of the temperature of the top plate, it is possible to sufficiently give the optimum pan bottom temperature for cooking without causing erroneous recognition.

このように本発明は、トッププレートの温度状態に関わらず正確に初期鍋底温度を検知した後、各初期鍋底温度に最適な設定温度を与え、鍋底温度の温度精度向上を効果的に行うことができる。   As described above, the present invention accurately detects the initial pan bottom temperature regardless of the temperature state of the top plate, and then gives an optimum set temperature to each initial pan bottom temperature, thereby effectively improving the temperature accuracy of the pan bottom temperature. it can.

本発明の実施の形態１における誘導加熱調理器を示す図The figure which shows the induction heating cooking appliance in Embodiment 1 of this invention 本発明の誘導加熱調理器の天ぷら調理の加熱制御方法を示す図The figure which shows the heating control method of the tempura cooking of the induction heating cooking appliance of this invention 本発明の実施の形態２における誘導加熱調理器を示す図The figure which shows the induction heating cooking appliance in Embodiment 2 of this invention 本発明の実施の形態３における誘導加熱調理器を示す図The figure which shows the induction heating cooking appliance in Embodiment 3 of this invention 従来技術の誘導加熱調理器を示す図The figure which shows the induction heating cooking appliance of a prior art

第１の発明は、鍋を載置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前記鍋を誘導加熱する加熱手段と、前記トッププレートの下方に設けられ前記鍋底の温度を検知する赤外線センサによる温度検知手段と、前記温度検知手段の出力をもとに前記鍋の初期温度を判定する初期温度判定手段と、前記鍋内に収容された調理物がすばやく上昇するように加熱開始時は前記鍋底の安定温度より高い第一の設定温度を設定し、前記第一の設定温度到達後は前記第一の設定温度より低い第二の設定温度を設定する温度設定手段と、前記温度検知手段が検知する温度が前記温度設定手段によって設定された温度となるように前記加熱手段の加熱出力を制御する制御手段とを備え、前記初期温度判定手段は、加熱開始後、第一の所定時間毎に前記温度検知手段の出力から第二の所定時間の第一の温度上昇値を算出し、加熱開始から第三の所定時間内に前記第二の所定時間の温度上昇値が所定の値を超えると鍋底温度が所定の温度よりも高い温度にあると判定し、前記温度設定手段に設定された前記第一の設定温度を低く変更することにより、トッププレートの温度状態に関わらず初期鍋底温度を正確に検知し第一の設定温度を変更することで最適な設定温度を与え、鍋底温度の温度精度向上を効果的に行うことができる。   The first invention includes a top plate on which a pan is placed, heating means provided below the top plate for induction heating the pan, and an infrared sensor provided below the top plate for detecting the temperature of the pan bottom. The temperature detection means according to the above, the initial temperature determination means for determining the initial temperature of the pan based on the output of the temperature detection means, and at the start of heating so that the food contained in the pan rises quickly A temperature setting means for setting a first set temperature higher than the stable temperature of the pan bottom, and setting a second set temperature lower than the first set temperature after reaching the first set temperature, and the temperature detecting means Control means for controlling the heating output of the heating means such that the temperature to be detected is set to the temperature set by the temperature setting means, and the initial temperature determination means is arranged at a first predetermined time after the start of heating. When the first temperature rise value for the second predetermined time is calculated from the output of the temperature detection means, and the temperature rise value for the second predetermined time exceeds the predetermined value within the third predetermined time from the start of heating. By determining that the pan bottom temperature is higher than a predetermined temperature and changing the first set temperature set in the temperature setting means to be low, the initial pan bottom temperature is accurately set regardless of the temperature state of the top plate. The optimal set temperature can be given by changing the first set temperature and the temperature accuracy of the pan bottom temperature can be effectively improved.

第２の発明は、特に、第１の発明において、初期温度判定手段を、加熱開始後、前記第一の所定時間毎に前記温度検知手段の出力から第二の所定時間の第一の温度上昇値を算出し、加熱開始から第三の所定時間内に前記第二の所定時間の第一の温度上昇値が所定の値
を超えると、鍋底温度が所定の温度よりも高い温度にあると判定することに代えて鍋底温度が赤外線センサが赤外線を検知できる温度よりも高い温度にあると判定し、前記温度設定手段に設定された前記第一の設定温度を低く変更するとすることにより鍋底温度を赤外線センサの感度波長を用いて高い温度にあると判定できる。 According to a second aspect of the invention, in particular, in the first aspect of the invention, the initial temperature determination means is configured to increase the first temperature for the second predetermined time from the output of the temperature detection means every first predetermined time after the start of heating. When the first temperature rise value of the second predetermined time exceeds the predetermined value within the third predetermined time from the start of heating, it is determined that the pan bottom temperature is higher than the predetermined temperature. Instead of determining that the pan bottom temperature is higher than the temperature at which the infrared sensor can detect infrared rays, and changing the first set temperature set in the temperature setting means to lower the pan bottom temperature. It can be determined that the temperature is high using the sensitivity wavelength of the infrared sensor.

第３の発明は、特に、第１または第２の発明において、第一の設定温度変更後、さらに第二の所定時間に第一の温度上昇値よりも大きな第二の温度上昇値を超えるとさらに前記第一の設定温度を低く変更する温度設定手段を備えることで、より正確な初期鍋底温度を検知した後、各初期鍋底温度に最適な設定温度を与え、鍋底温度の温度精度向上をさらに効果的に行うことができる。   In particular, in the first or second invention, when the third temperature exceeds a second temperature rise value larger than the first temperature rise value at the second predetermined time after the first set temperature change, Furthermore, by providing a temperature setting means for changing the first set temperature to a lower value, after detecting a more accurate initial pan bottom temperature, an optimum set temperature is given to each initial pan bottom temperature, and the temperature accuracy of the pan bottom temperature is further improved. Can be done effectively.

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。   Embodiments of the present invention will be described below with reference to the drawings. Note that the present invention is not limited to the embodiments.

（実施の形態１）
以下本発明の第１の実施の形態について、図面を参照しながら説明する。図１は、本発明の実施の形態１における誘導加熱調理器の図、図２は本発明の誘導加熱調理器の天ぷら調理の加熱制御方法を示す図である。 (Embodiment 1)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram of an induction heating cooker according to Embodiment 1 of the present invention, and FIG. 2 is a diagram illustrating a heating control method for tempura cooking of the induction heating cooker of the present invention.

図１において鍋１を載置するトッププレート２と、トッププレート２の下方に設けられ鍋１を誘導加熱する加熱手段７と、トッププレート２の下方に設けられ鍋１の初期温度を検知する赤外線センサ４による温度検知手段８と、温度検知手段８の出力をもとに鍋１の初期温度を判定する初期温度判定９と、鍋１内に収容された油がすばやく上昇するように加熱開始時は鍋１の鍋底の安定温度より高い第一の設定温度を設定し、前記第一の設定温度到達後は前記第一の設定温度より低い第二の設定温度を設定する温度設定手段１０と、温度検知手段８が検知する温度が温度設定手段１０によって設定された設定温度となるように加熱手段７の加熱出力を制御する制御手段１１とを備え、初期温度判定手段９は、加熱開始後、前記第一の所定時間毎に温度検知手段８の出力から第二の所定時間の第一の温度上昇値を算出し、加熱開始から第三の所定時間内に前記第二の所定時間の温度上昇値が所定の値を超えると鍋底温度が所定の鍋底温度よりも高い温度にあると判定し、温度設定手段１０に設定された前記第一の設定温度を低く変更する。   In FIG. 1, a top plate 2 on which the pan 1 is placed, a heating means 7 provided below the top plate 2 for induction heating, and an infrared ray provided below the top plate 2 to detect the initial temperature of the pan 1. The temperature detection means 8 by the sensor 4, the initial temperature determination 9 for determining the initial temperature of the pan 1 based on the output of the temperature detection means 8, and at the start of heating so that the oil contained in the pan 1 rises quickly. Sets a first set temperature higher than the stable temperature of the pan bottom of the pan 1, and after reaching the first set temperature, temperature setting means 10 for setting a second set temperature lower than the first set temperature; And a control means 11 for controlling the heating output of the heating means 7 so that the temperature detected by the temperature detection means 8 becomes the set temperature set by the temperature setting means 10, and the initial temperature determination means 9 The first predetermined time The first temperature rise value for the second predetermined time is calculated from the output of the temperature detecting means 8 and the temperature rise value for the second predetermined time exceeds the predetermined value within the third predetermined time from the start of heating. The pan bottom temperature is determined to be higher than the predetermined pan bottom temperature, and the first set temperature set in the temperature setting means 10 is changed to be low.

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

まず、商用電源５を投入し図示していない操作スイッチで加熱を開始すると、インバータ回路６から加熱コイル３に電力を供給し、加熱コイル３ に誘導磁界が発生する。   First, when the commercial power supply 5 is turned on and heating is started with an operation switch (not shown), electric power is supplied from the inverter circuit 6 to the heating coil 3, and an induction magnetic field is generated in the heating coil 3.

そして、トッププレート２上の鍋１が加熱される。   And the pan 1 on the top plate 2 is heated.

この誘導加熱によって鍋１の温度が上昇し、鍋１内の被加熱物である、例えば油の温度が上昇するものである。   By this induction heating, the temperature of the pan 1 rises, and the temperature of the object to be heated in the pan 1, for example, oil rises.

ここで、鍋１の温度が上昇すると、その温度に対応した量の赤外線が鍋１から放射される。トッププレート２を通った赤外線が赤外線センサ４に入射される。赤外線センサ４は使用する素子の特性によって、検知可能な温度が違い、検知温度以下であると温度上昇値はゼロで、検知温度以上で初めて温度上昇値が検知されるものである。トッププレートからの赤外線放射の影響を受けた初期鍋底温度検知になっている。   Here, when the temperature of the pan 1 rises, an amount of infrared rays corresponding to the temperature is emitted from the pan 1. Infrared rays that have passed through the top plate 2 enter the infrared sensor 4. The infrared sensor 4 has different detectable temperatures depending on the characteristics of the elements used. If the temperature is lower than the detection temperature, the temperature increase value is zero, and the temperature increase value is detected only when the temperature is higher than the detection temperature. The initial pan bottom temperature detection is affected by the infrared radiation from the top plate.

そこで図２において初期温度判定手段９でトッププレートの温度を考慮しない鍋１の初期鍋底温度を判定し、加熱開始後、前記第一の所定時間毎に温度検知手段８の出力から第
二の所定時間の第一の温度上昇値を算出し、加熱開始から第三の所定時間内に前記第二の所定時間の温度上昇値が所定の値を超えると鍋底温度が所定の鍋底温度よりも高い温度にあると判定し、第一の設定温度を低く変更する。 Therefore, in FIG. 2, the initial temperature determining means 9 determines the initial pan bottom temperature of the pan 1 not considering the temperature of the top plate, and after the start of heating, the second predetermined predetermined value is output from the output of the temperature detecting means 8 every first predetermined time. The first temperature rise value of time is calculated, and when the temperature rise value of the second predetermined time exceeds the predetermined value within the third predetermined time from the start of heating, the temperature at which the pan bottom temperature is higher than the predetermined pan bottom temperature The first set temperature is changed to a low value.

なお、初期温度判定手段９に用いられる所定時間と温度設定手段１０に用いられる設定温度は予め最適な値を実験的に決定するものである。   The predetermined time used for the initial temperature determination means 9 and the set temperature used for the temperature setting means 10 are experimentally determined in advance as optimum values.

以上のように本実施の形態では、トッププレートの温度状態に関わらず赤外線センサ４を介して初期温度判定手段９と温度設定手段１０を用いることにより鍋１の初期鍋底温度を正確に検知して設定温度を変更することができる。   As described above, in the present embodiment, the initial pan bottom temperature of the pan 1 is accurately detected by using the initial temperature determination means 9 and the temperature setting means 10 via the infrared sensor 4 regardless of the temperature state of the top plate. The set temperature can be changed.

なお、赤外線センサ４の位置はトッププレート２の下方に設けられていればコイルの中央に設けられてもコイル間に設けられていてもよく、個数も１個には限らず、種類も問わない。   The position of the infrared sensor 4 may be provided at the center of the coil or between the coils as long as it is provided below the top plate 2, and the number is not limited to one, and the type is not limited. .

（実施の形態２）
以下本発明の第２の実施の形態について、図面を参照しながら説明する。図３は本発明の実施の形態２における誘導加熱調理器を示す図である。 (Embodiment 2)
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a diagram showing an induction heating cooker according to Embodiment 2 of the present invention.

なお、実施の形態１と同じ構成物・動作については説明を省略する。   Note that description of the same components and operations as those of the first embodiment is omitted.

本実施の形態は、加熱開始後、前記第一の所定時間毎に温度検知手段８の出力から第一の所定時間の温度上昇値を算出し、加熱開始から第三の所定時間内に前記第一の所定時間の温度上昇値が所定の値を超えると鍋の鍋底温度が所定の鍋底温度よりも高い温度にあると判定する初期温度判定手段９を、加熱開始後、第一の所定時間毎に温度検知手段８の出力から第一の所定時間の温度上昇値を算出し、加熱開始から第三の所定時間内に第一の所定時間の温度上昇値が所定の値を超えると、実施の形態１では鍋底温度が所定の鍋底温度よりも高い温度にあると判定する初期温度判定手段９に代えて、鍋底温度が赤外線の検知できる温度よりも高い温度にあると判定する初期温度判定手段１２を備えることにより、赤外線センサ４の特性の感度波長を用いて鍋底温度が赤外線センサ４で検知可能な高い温度にあると判定できる。   In the present embodiment, after heating is started, the temperature rise value of the first predetermined time is calculated from the output of the temperature detecting means 8 at every first predetermined time, and the third predetermined time from the start of heating is calculated. When the temperature rise value of one predetermined time exceeds a predetermined value, the initial temperature determination means 9 for determining that the pan bottom temperature of the pan is higher than the predetermined pan bottom temperature is set to the first predetermined time after the start of heating. When the temperature rise value for the first predetermined time is calculated from the output of the temperature detection means 8 and the temperature rise value for the first predetermined time exceeds the predetermined value within the third predetermined time from the start of heating, In the first embodiment, instead of the initial temperature determining means 9 for determining that the pan bottom temperature is higher than the predetermined pan bottom temperature, the initial temperature determining means 12 for determining that the pan bottom temperature is higher than the temperature at which infrared rays can be detected. By providing the sensitivity wave of the characteristics of the infrared sensor 4 Pan bottom temperature can be determined at a high temperature can be detected by the infrared sensor 4 using.

鍋底温度の判定温度設定後、実施の形態１と同様に動作、作用する。   After setting the determination temperature of the pan bottom temperature, the operation and the action are performed in the same manner as in the first embodiment.

なお、判定温度は感度波長の違う特性の異なる素子を赤外線センサ４に用いれば低めにも高めにも設定を変更することができる。   The determination temperature can be set to be lower or higher if elements having different characteristics with different sensitivity wavelengths are used in the infrared sensor 4.

以上のように本実施の形態では、鍋底温度が所定の鍋底温度よりも高い温度にあると判定する初期温度判定手段９を鍋底温度が赤外線の検知できる温度よりも高い温度にあると判定する初期温度判定手段１２に代えることにより、鍋底温度を赤外線センサ４の感度波長を用いて高い温度にあると判定できる。   As described above, in the present embodiment, the initial temperature determining means 9 that determines that the pan bottom temperature is higher than the predetermined pan bottom temperature is the initial stage for determining that the pan bottom temperature is higher than the temperature at which infrared rays can be detected. By replacing with the temperature determination means 12, it can be determined that the pan bottom temperature is at a high temperature using the sensitivity wavelength of the infrared sensor 4.

（実施の形態３）
以下本発明の第３の実施の形態について、図面を参照しながら説明する。図４は本発明の実施の形態３における誘導加熱調理器を示す図である。 (Embodiment 3)
The third embodiment of the present invention will be described below with reference to the drawings. FIG. 4 is a diagram showing an induction heating cooker according to Embodiment 3 of the present invention.

なお、実施の形態１と同じ構成物・動作については説明を省略する。   Note that description of the same components and operations as those of the first embodiment is omitted.

本実施の形態は、実施の形態１において鍋底温度がすばやく上昇するように加熱開始時は前記鍋底の安定温度より高い第一の設定温度を設定し第一の設定温度到達後は第一の設
定温度より低い第二の設定温度を設定する温度設定手段１０に代えて、実施の形態１における初期温度判定手段９または実施の形態２における初期温度判定手段１２により、加熱開始後、前記第一の所定時間毎に温度検知手段８の出力から第二の所定時間の第一の温度上昇値を算出し、加熱開始から第三の所定時間内に前記第二の所定時間の温度上昇値が所定の値を超えると鍋底温度が所定の鍋底温度よりも高い温度にあるまたは鍋底温度が赤外線の検知できる温度よりも高い温度にあると判定し、温度設定手段１３に設定された前記第一の設定温度を低く第一の設定温度変更後、さらに第二の所定時間に第一の温度上昇値よりも大きな第二の温度上昇値を超えるとさらに前記第一の設定温度を低く変更する温度設定手段１３を備える。温度設定手段１３を備えることにより実施の形態１に記載の前記第二の所定時間の第一の温度上昇値よりも大きな第二の温度上昇値を超えるとさらに第一の設定温度を低く変更することができる。 In the present embodiment, the first set temperature higher than the stable temperature of the pan bottom is set at the start of heating so that the pan bottom temperature rises quickly in the first embodiment, and the first set temperature is reached after reaching the first set temperature. Instead of the temperature setting means 10 for setting the second set temperature lower than the temperature, the first temperature determining means 9 in the first embodiment or the initial temperature determining means 12 in the second embodiment uses the first temperature after starting heating. The first temperature rise value of the second predetermined time is calculated from the output of the temperature detection means 8 at every predetermined time, and the temperature rise value of the second predetermined time is predetermined within a third predetermined time from the start of heating. If the value exceeds the value, it is determined that the pan bottom temperature is higher than the predetermined pan bottom temperature or the pan bottom temperature is higher than the temperature at which infrared rays can be detected, and the first set temperature set in the temperature setting means 13 is determined. Lower the first setting After the temperature change, further comprising a second predetermined time to a first temperature setting means 13 to change the large second exceeds the temperature rise value of the addition the first set temperature lower than the temperature rise value. By providing the temperature setting means 13, when the second temperature rise value larger than the first temperature rise value of the second predetermined time described in the first embodiment is exceeded, the first set temperature is further lowered. be able to.

なお、温度設定手段１３に用いられる第二の所定時間の第一の温度上昇値、第二の温度上昇値は予め最適な値を実験的に決定するものである。   The first temperature rise value and the second temperature rise value for the second predetermined time used for the temperature setting means 13 are experimentally determined in advance as optimum values.

以上のように本実施の形態では、第二の所定時間の第一の温度上昇値よりも大きな第二の温度上昇値を超えるとさらに第一の設定温度を低くする温度設定手段１３によって第一の設定温度をさらに低く変更し、より最適な第一の設定温度を与え、鍋底温度の温度精度向上を効果的に行うことができる。   As described above, in the present embodiment, the temperature setting means 13 that further lowers the first set temperature when the second temperature rise value that is larger than the first temperature rise value for the second predetermined time is exceeded. The set temperature can be further lowered to give a more optimal first set temperature, and the temperature accuracy of the pan bottom temperature can be effectively improved.

以上のように本発明にかかる誘導加熱調理器は、トッププレートの温度状態に関わらず初期鍋底温度を正確に検知して設定温度を変更することで最適な設定温度を与え、鍋底温度の温度精度向上を効果的に行うことが可能となるので、家庭用あるいは業務用など様々な誘導加熱調理器にも適用できる。   As described above, the induction heating cooker according to the present invention accurately detects the initial pan bottom temperature regardless of the temperature state of the top plate and changes the set temperature to give an optimal set temperature, and the temperature accuracy of the pan bottom temperature. Since the improvement can be performed effectively, it can be applied to various induction heating cookers such as home use and business use.

１ 鍋
２ トッププレート
３ 加熱コイル
４ 赤外線センサ
５ 商用電源
６ インバータ回路
７ 加熱手段
８ 温度検知手段
９、１２ 初期温度判定手段
１０、１３ 温度設定手段
１１ 制御手段 DESCRIPTION OF SYMBOLS 1 Pan 2 Top plate 3 Heating coil 4 Infrared sensor 5 Commercial power supply 6 Inverter circuit 7 Heating means 8 Temperature detection means 9, 12 Initial temperature determination means 10, 13 Temperature setting means 11 Control means

Claims (3)

鍋を載置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前記鍋を誘導加熱する加熱手段と、前記トッププレートの下方に設けられ前記鍋底の温度を検知する赤外線センサによる温度検知手段と、前記温度検知手段の出力をもとに前記鍋の初期温度を判定する初期温度判定手段と、前記鍋内に収容された調理物がすばやく上昇するように加熱開始時は前記鍋底の安定温度より高い第一の設定温度を設定し、前記第一の設定温度到達後は前記第一の設定温度より低い第二の設定温度を設定する温度設定手段と、前記温度検知手段が検知する温度が前記温度設定手段によって設定された温度となるように前記加熱手段の加熱出力を制御する制御手段とを備え、前記初期温度判定手段は、加熱開始後、第一の所定時間毎に前記温度検知手段の出力から第二の所定時間の第一の温度上昇値を算出し、加熱開始から第三の所定時間内に前記第二の所定時間の温度上昇値が所定の値を超えると鍋底温度が所定の温度よりも高い温度にあると判定し、前記温度設定手段に設定された前記第一の設定温度を低く変更する誘導加熱調理器。 A top plate on which the pan is placed; a heating means provided under the top plate for induction heating the pan; a temperature detecting means provided under the top plate for detecting the temperature of the pan bottom; Initial temperature determination means for determining the initial temperature of the pan based on the output of the temperature detection means, and at the start of heating so that the food contained in the pan rises quickly, is higher than the stable temperature of the pan bottom A temperature setting means for setting a first set temperature and setting a second set temperature lower than the first set temperature after reaching the first set temperature, and a temperature detected by the temperature detecting means is the temperature Control means for controlling the heating output of the heating means so as to reach the temperature set by the setting means, and the initial temperature determination means detects the temperature every first predetermined time after the start of heating. The first temperature rise value of the second predetermined time is calculated from the output of the stage, and when the temperature rise value of the second predetermined time exceeds the predetermined value within the third predetermined time from the start of heating, the pan bottom temperature is An induction heating cooker that determines that the temperature is higher than a predetermined temperature and changes the first set temperature set in the temperature setting means to be low. 初期温度判定手段は、加熱開始後、第一の所定時間毎に前記温度検知手段の出力から第二の所定時間の第一の温度上昇値を算出し、加熱開始から第三の所定時間内に前記第二の所定時間の温度上昇値が所定の値を超えると、鍋底温度が所定の温度よりも高い温度にあると判定することに代えて鍋底温度が赤外線センサが赤外線を検知できる温度よりも高い温度にあると判定し、前記温度設定手段に設定された前記第一の設定温度を低く変更する請求項１に記載の誘導加熱調理器。 The initial temperature determining means calculates the first temperature rise value for the second predetermined time from the output of the temperature detecting means every first predetermined time after the start of heating, and within the third predetermined time from the start of heating. When the temperature rise value of the second predetermined time exceeds a predetermined value, the pot bottom temperature is higher than the temperature at which the infrared sensor can detect infrared rays instead of determining that the pot bottom temperature is higher than the predetermined temperature. The induction heating cooker according to claim 1, wherein it is determined that the temperature is high, and the first set temperature set in the temperature setting means is changed to be low. 第一の設定温度変更後、さらに第二の所定時間に第一の温度上昇値よりも大きな第二の温度上昇値を超えるとさらに前記第一の設定温度を低く変更する温度設定手段を備えた請求項１または２に記載の誘導加熱調理器。 After the first set temperature change, further provided with a temperature setting means for changing the first set temperature further lower when a second temperature rise value larger than the first temperature rise value is exceeded at a second predetermined time. The induction heating cooker according to claim 1 or 2.
JP2009135842A 2009-06-05 2009-06-05 Induction heating cooker Expired - Fee Related JP5218287B2 (en)

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JP2013251162A (en) * 2012-06-01 2013-12-12 Mitsubishi Electric Corp Induction heating cooker
JP2014525561A (en) * 2011-08-31 2014-09-29 コーニンクレッカ フィリップス エヌ ヴェ heater

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JP2007089874A (en) * 2005-09-29 2007-04-12 Mitsubishi Electric Corp Cooker

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JPH1187043A (en) * 1997-09-12 1999-03-30 Toshiba Corp Electromagnetic cooking device
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JP2014525561A (en) * 2011-08-31 2014-09-29 コーニンクレッカ フィリップス エヌ ヴェ heater
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