JP2009295457A - Induction heating cooker - Google Patents

Induction heating cooker Download PDF

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JP2009295457A
JP2009295457A JP2008148714A JP2008148714A JP2009295457A JP 2009295457 A JP2009295457 A JP 2009295457A JP 2008148714 A JP2008148714 A JP 2008148714A JP 2008148714 A JP2008148714 A JP 2008148714A JP 2009295457 A JP2009295457 A JP 2009295457A
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temperature
heating
top plate
heating coil
pan
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Hiroshi Otomo
博 大友
Seiji Yamada
清司 山田
Ryohei Matsuo
良平 松尾
Hiroki Oshimi
博喜 押見
Yuji Asao
祐司 朝生
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Hitachi Appliances Inc
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Hitachi Appliances Inc
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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)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an induction heating cooker which detects accurately temperature of a pan and is improved in cooking performance. <P>SOLUTION: The induction heating cooker includes a top plate 2 to mount a heating object arranged on the upper side of a case 1 and includes a heating coil 3 formed in a ring shape in the case 1 underneath the top plate 2 and an inverter 15 to supply power to the heating coil 3. The heating cooker is installed with an inner temperature sensor 31d which is installed in the vicinity of the central part of the heating coil 3 and detects the lower side temperature of the top plate 2, outer temperature sensors 31e, etc. which are installed three pieces or more at the inner side than the outer circumference of the heatindgcoil 3 and detect the lower side temperature of the top plate 2, an infrared sensor 12 which is installed at the lower part in the vicinity of the central part of the heating coil 3 and detects infrared rays emitted from the heating object, and a control means 14 which controls the inverter 15 based on the detected signal of the inner temperature sensor 31d, the outer temperature sensors 31e, etc. and the infrared sensor 12, and heating controls the heating object. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、筐体内に誘導加熱コイルを備え、その上面に耐熱ガラス製のトッププレートを配置した誘導加熱調理器に関するものである。   The present invention relates to an induction heating cooker provided with an induction heating coil in a casing and having a heat-resistant glass top plate disposed on the upper surface thereof.

従来、この種の誘導加熱調理器は、トッププレート裏面に設けた温度センサと、本体内に設けた赤外線センサと、温度センサと赤外線センサの温度情報を受けて加熱量を制御する制御手段とを備え、鍋の温度をトッププレートを介して温度センサで検知し、同時に鍋の温度変化を赤外線センサで検知する誘導加熱調理器が提案されている（例えば、特許文献１参照）。   Conventionally, this type of induction heating cooker has a temperature sensor provided on the back surface of the top plate, an infrared sensor provided in the main body, and a temperature sensor and a control means for receiving the temperature information of the infrared sensor and controlling the amount of heating. An induction heating cooker has been proposed that detects the temperature of a pan with a temperature sensor via a top plate and simultaneously detects the temperature change of the pan with an infrared sensor (see, for example, Patent Document 1).

また、鍋を載置するトッププレートと、鍋を加熱する加熱コイルと、加熱コイルに高周波電流を供給し、鍋を電磁誘導で加熱するインバータと、トッププレート下面の加熱コイル上部近傍に複数配置し、鍋の温度をトッププレートを介して検知する温度検知部とを備えたものがある（例えば、特許文献２参照）。   Also, a top plate on which the pan is placed, a heating coil that heats the pan, an inverter that supplies high-frequency current to the heating coil and heats the pan by electromagnetic induction, and a plurality of heaters are arranged near the top of the heating coil on the bottom of the top plate. And a temperature detector that detects the temperature of the pan via the top plate (for example, see Patent Document 2).

また、環状の第１の加熱コイルの外側に隙間を設けて第２の加熱コイルを設け、第１の加熱コイルの中心部に第１の感熱部と、隙間に設けた第２の感熱部を設け、第２の感熱部の制御動作の後に第１の感熱部の制御動作を行うようにしたものがある（例えば、特許文献３参照）。   In addition, a second heating coil is provided by providing a gap outside the annular first heating coil, and a first heat sensitive part and a second heat sensitive part provided in the gap are provided at the center of the first heating coil. There is one that performs the control operation of the first heat-sensitive part after the control operation of the second heat-sensitive part (see, for example, Patent Document 3).

さらに、トッププレートの上に載置する鍋の温度をトッププレートの下面に当接させたサーミスタなどの温度センサにより鍋の温度を検出するように構成したものにおいて、底面が平らな鍋に少量の油を入れて加熱する際、温度センサの所定時間における温度変化をとらえ、この温度変化量が所定値を越えた際は加熱出力を低下させて、鍋の中の油が発火温度に達することがないように加熱制御するものがある（例えば、特許文献４参照）。   In addition, the temperature of the pan placed on the top plate is detected by a temperature sensor such as a thermistor that contacts the lower surface of the top plate. When oil is added and heated, the temperature change of the temperature sensor is captured for a predetermined time, and when the amount of temperature change exceeds a predetermined value, the heating output is reduced and the oil in the pan reaches the ignition temperature. There are some which control heating so that there is no (see, for example, Patent Document 4).

特許第２８９７３０６号公報Japanese Patent No. 2897306 特開２００３−３１７９１９号公報JP 2003-317919 A 特許第２８２２５５５号公報Japanese Patent No. 2822555 特開平５−６２７７２号公報Japanese Patent Laid-Open No. 5-62772

上記した従来の誘導加熱調理器において、特許文献１のものは、赤外線センサで鍋の急激な温度変化を検知し、温度センサで鍋の絶対温度を検知することにより、鍋の温度状態を把握することが出来るが、温度センサが１個のため鍋の大きさ，鍋の置く位置や、鍋の材質による赤外線の放射率の差や、鍋底面の汚れや、赤外線を透過するトッププレート部の汚れ等の要因により、鍋の温度検知精度に課題があった。   In the above-mentioned conventional induction heating cooker, the thing of patent document 1 grasps | ascertains the temperature state of a pan by detecting the rapid temperature change of a pan with an infrared sensor, and detecting the absolute temperature of a pan with a temperature sensor. However, since there is only one temperature sensor, the size of the pan, the position of the pan, the difference in infrared emissivity depending on the pan material, the bottom of the pan, and the top plate that transmits infrared light Due to these factors, there was a problem in the temperature detection accuracy of the pan.

また、特許文献２のものは、鍋の温度をトッププレートを介して温度検知部が受熱して温度を検出しているが、トッププレートの熱応答の遅れ時間により、温度検知部で検知した温度と実際の鍋の温度との間には大きな温度差が発生し、加熱初期の鍋の局部的な温度上昇を抑制しようとすると問題がある。   Moreover, although the temperature detection part receives the temperature of a pan via a top plate and detects temperature in the thing of patent document 2, the temperature detected by the temperature detection part by the delay time of the thermal response of a top plate. There is a large temperature difference between the actual temperature of the pan and the actual temperature of the pan, and there is a problem when trying to suppress the local temperature rise of the pan in the initial stage of heating.

また、特許文献３のものは、温度センサが加熱コイルに２箇所しか設けられていないので、鍋底の直径が１２０mm程度の小径の調理鍋を使用し、かつ、調理鍋が加熱コイルの中心から外れて外側温度センサの配置されていないところに載置された場合には、鍋の温度を内側温度センサと外側温度センサの両方によって検出することができず、鍋底の周辺部が急激に温度上昇して高温になり、空焼きや煙等が発生するという課題があった。   Moreover, since the temperature sensor is provided only in two places in the heating coil, the thing of patent document 3 uses the small diameter cooking pot whose diameter of a pan bottom is about 120 mm, and the cooking pot deviates from the center of a heating coil. If the pan is placed where the outer temperature sensor is not located, the temperature of the pan cannot be detected by both the inner temperature sensor and the outer temperature sensor. As a result, there was a problem that the temperature became high and air burning or smoke was generated.

また、温度センサは、トッププレートを介しているため、熱応答の遅れ時間により温度センサで検出した温度と実際の鍋の温度との間には大きな温度差が生じ、加熱初期の鍋の局部的な温度上昇が抑制しづらいという課題があった。   In addition, since the temperature sensor is connected to the top plate, there is a large temperature difference between the temperature detected by the temperature sensor and the actual pan temperature due to the delay time of the thermal response. There was a problem that it was difficult to suppress the temperature rise.

また、特許文献４のものは、少量の油を加熱する場合には鍋全体の熱容量が小さく、かつ温度センサはトッププレートを介して鍋の温度を検出するので、温度センサは鍋の温度上昇に追従できないため、温度センサの温度変化量に注目して、所定値を越えた場合には加熱コイルの加熱出力を低下させ、油の温度上昇を遅らせて温度センサの温度追従性を向上させるようにしているが、油を予熱して適温にするまでの時間が長くなり使い勝手が悪くなるという課題があった。   In addition, in Patent Document 4, when a small amount of oil is heated, the heat capacity of the whole pan is small, and the temperature sensor detects the temperature of the pan through the top plate, so the temperature sensor increases the temperature of the pan. Since it cannot follow, pay attention to the temperature change amount of the temperature sensor, and if it exceeds a predetermined value, the heating output of the heating coil is reduced and the temperature rise of the temperature sensor is improved by delaying the oil temperature rise. However, there is a problem that the time until the oil is preheated to an appropriate temperature becomes longer and the usability becomes worse.

また、油の量が極少量の場合には、油の温度がさらに急速に上昇するため適温以上の高温になってしまうという課題があった。   In addition, when the amount of oil is extremely small, the temperature of the oil rises more rapidly, causing a problem that the temperature becomes higher than the appropriate temperature.

本発明の目的は、上記課題のうち少なくとも一つを解決するものであり、鍋の大きさ，鍋の置く位置による鍋の温度検知精度を向上させ、必要以上の温度上昇による、空焼きや煙等の発生を抑制した誘導加熱調理器を提供することにある。   The object of the present invention is to solve at least one of the above-mentioned problems, improve the temperature detection accuracy of the pan depending on the size of the pan and the position where the pan is placed, It is providing the induction heating cooking appliance which suppressed generation | occurrence | production etc.

本発明の請求項１では、筐体の上面に被加熱物を載置するトッププレートを配置し、該トッププレート下方の前記筐体内に環状に形成された加熱コイルと、該加熱コイルに電力を供給するインバータとを備えた誘導加熱調理器において、前記加熱コイル中心部近傍に設けられ前記トッププレートの下面温度を検出する内側温度センサと、前記加熱コイルの外周部に３個以上設けられ前記トッププレートの下面温度を検出する外側温度センサと、前記加熱コイルの中心部近傍の下方に設けられ、前記被加熱物から放射される赤外線を検出する赤外線センサと、前記内側温度センサと前記外側温度センサと前記赤外線センサとの検出信号を基に、前記インバータを制御して前記被加熱物を加熱制御する制御手段とを設けたものである。   According to the first aspect of the present invention, a top plate for placing an object to be heated is disposed on the upper surface of the casing, and a heating coil formed in an annular shape in the casing below the top plate, and electric power is supplied to the heating coil. In an induction heating cooker including an inverter to be supplied, three or more inner temperature sensors provided near the center of the heating coil for detecting the temperature of the lower surface of the top plate, and three or more provided on the outer periphery of the heating coil. An outer temperature sensor for detecting the lower surface temperature of the plate, an infrared sensor for detecting infrared rays radiated from the object to be heated, provided below the vicinity of the center of the heating coil, the inner temperature sensor, and the outer temperature sensor And a control means for controlling the inverter to control heating of the object to be heated based on detection signals from the infrared sensor and the infrared sensor.

また、請求項２では、請求項１記載の誘導加熱調理器において、前記制御手段は、前記内側温度センサと外側温度センサと赤外線センサの各センサが検知した温度を比較し、一番高い温度を検知したセンサの検出信号出力を優先して前記被加熱物を加熱制御するものである。   Further, in claim 2, in the induction heating cooker according to claim 1, the control means compares the temperatures detected by the inner temperature sensor, the outer temperature sensor, and the infrared sensor, and determines the highest temperature. The object to be heated is controlled by giving priority to the detection signal output of the detected sensor.

本発明の誘導加熱調理器は、上記のように構成したことにより、内側温度センサと、外側温度センサの各センサの温度検出特性と、赤外線センサの温度検出特性のそれぞれの特性の違いを取り入れて鍋の加熱制御を行うことにより、調理温度の違いや調理物の量及び鍋の大きさや鍋の置く位置によっても鍋の温度を正確に検知し、調理を良好に行うことができる。   Since the induction cooking device of the present invention is configured as described above, it incorporates differences in the temperature detection characteristics of the inner temperature sensor, the outer temperature sensor, and the temperature detection characteristic of the infrared sensor. By controlling the heating of the pot, the temperature of the pot can be accurately detected depending on the difference in cooking temperature, the amount of food, the size of the pot, and the position where the pot is placed, and cooking can be performed satisfactorily.

また、鍋の必要以上な温度上昇による空焼きや煙等の発生を抑制することができる。   Moreover, generation | occurrence | production of the sky baking, smoke, etc. by the temperature rise more than necessary of a pan can be suppressed.

以下、本発明の実施例を図面を参照して説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１は本実施例における誘導加熱調理器の外観斜視図である。   FIG. 1 is an external perspective view of an induction heating cooker in the present embodiment.

図１において、誘導加熱調理器の筐体１の上面にはトッププレート２が水平に配置されている。   In FIG. 1, a top plate 2 is horizontally disposed on the upper surface of the casing 1 of the induction heating cooker.

トッププレート２は、耐熱性の高い結晶化ガラス製の厚さ約４mmのもので構成され、鉄等の磁性体又はアルミ等の非磁性体よりなる鍋３０等の被加熱物を載置する。   The top plate 2 is made of crystallized glass with a high heat resistance and has a thickness of about 4 mm, and places an object to be heated such as a pot 30 made of a magnetic material such as iron or a non-magnetic material such as aluminum.

トッププレート２下方で、筐体１内の上部で左右及び中央後部には、環状に形成された加熱コイル３が夫々配置されており、トッププレート２に載置された鍋３０等の被加熱物を誘導加熱する。   Below the top plate 2, annular heating coils 3 are arranged on the left and right and center rear in the upper part of the housing 1, and a heated object such as a pan 30 placed on the top plate 2. Induction heating.

トッププレート２の前面側上面には、夫々の加熱コイル３に対応した操作部７が設けられていて、加熱コイル３の通電状態の設定や操作を行う。また、操作部７に対応して表示部８が操作部７の近傍に設けられており、夫々の加熱コイル３の通電状態等を表示する。   An operation unit 7 corresponding to each heating coil 3 is provided on the upper surface on the front surface side of the top plate 2, and the energization state of the heating coil 3 is set and operated. Further, a display unit 8 is provided in the vicinity of the operation unit 7 corresponding to the operation unit 7, and displays the energization state and the like of each heating coil 3.

筐体１の後部右側には、上方に向けて開口した吸気口４が設けられており、筐体１内に設けられたファン（図示せず）により、吸気口４から吸気した冷却風を筐体１内に設けられた制御基板（図示せず）や加熱コイル３等に流して冷却する。   An intake port 4 opened upward is provided on the rear right side of the housing 1, and cooling air sucked from the intake port 4 by a fan (not shown) provided in the housing 1 is provided in the housing 1. It cools by flowing through a control board (not shown), a heating coil 3 or the like provided in the body 1.

筐体１の後部左側には、筐体１内部を冷却した冷却風を排気する排気口５が設けられている。   An exhaust port 5 for exhausting the cooling air that has cooled the inside of the housing 1 is provided on the rear left side of the housing 1.

筐体１の前面左部には、魚やピザ等を焼くグリル加熱部６が設けられている。   A grill heating unit 6 for grilling fish, pizza or the like is provided on the left side of the front surface of the housing 1.

図２は、実施例１における誘導加熱調理器のトッププレート２を除いた状態の上面図。図３は、実施例１における誘導加熱調理器の右側に配設された加熱コイル３の要部縦断面図である。   FIG. 2 is a top view of the induction heating cooker according to the first embodiment with the top plate 2 removed. FIG. 3 is a longitudinal sectional view of a main part of the heating coil 3 disposed on the right side of the induction heating cooker in the first embodiment.

図２において、左右及び中央後部に配設された加熱コイル３は、夫々環状の内側加熱コイル３１ａ，３２ａ，３３ａと、その外側に環状の隙間３１ｂ，３２ｂ，３３ｂを設けて配置された環状の外側加熱コイル３１ｃ，３２ｃ，３３ｃとで構成されている。   In FIG. 2, the heating coils 3 disposed on the left and right and the center rear are annular inner heating coils 31 a, 32 a, 33 a and annular gaps 31 b, 32 b, 33 b arranged on the outer sides thereof. It consists of outer heating coils 31c, 32c, 33c.

夫々の加熱コイル３に隙間３１ｂ，３２ｂ，３３ｂを設ける理由は、内側加熱コイル３１ａ，３２ａ，３３ａと外側加熱コイル３１ｃ，３２ｃ，３３ｃで発生する磁束を分散させて鍋３０の温度を均一化するためである。   The reason why the gaps 31b, 32b, 33b are provided in the respective heating coils 3 is that the magnetic fluxes generated by the inner heating coils 31a, 32a, 33a and the outer heating coils 31c, 32c, 33c are dispersed to make the temperature of the pan 30 uniform. Because.

なお、加熱コイル３には隙間３１ｂ，３２ｂ，３３ｂを設ける構成としたが、特にこれに限定されることはない。例えば内側加熱コイル３１ａと外側加熱コイル３１ｃを隙間無く巻回した隙間３１ｂの無い加熱コイルとした構成であってもよい。   In addition, although it was set as the structure which provides the clearance gaps 31b, 32b, and 33b in the heating coil 3, it is not specifically limited to this. For example, a configuration in which the inner heating coil 31a and the outer heating coil 31c are wound without a gap and without a gap 31b may be employed.

各加熱コイル３は、コイルベース９上に設置されており、コイルベース９は複数のバネ（図示せず）によりトッププレート２方向に付勢され、加熱コイル３がトッププレート２に対し略並行となるように構成されている。   Each heating coil 3 is installed on a coil base 9, and the coil base 9 is biased toward the top plate 2 by a plurality of springs (not shown), and the heating coil 3 is substantially parallel to the top plate 2. It is comprised so that it may become.

また、各加熱コイル３は、表皮効果を抑制するためリッツ線を採用していて、後述するインバータにより数十ｋＨｚの高周波で数百Ｖの電圧が印加され、鍋３０に対して高周波磁界を印加して鍋３０に渦電流を発生させ、鍋３０を自己発熱させて加熱する。   Each heating coil 3 employs a litz wire to suppress the skin effect, and a voltage of several hundred volts is applied to the pan 30 at a high frequency of several tens kHz by an inverter described later. Then, an eddy current is generated in the pan 30, and the pan 30 is heated by self-heating.

なお、左側に配設された加熱コイル３及び中央後部に配設された加熱コイル３も同様な構成となっている。   The heating coil 3 disposed on the left side and the heating coil 3 disposed on the central rear part have the same configuration.

図３に示すように、内側加熱コイル３１ａの中心部近傍には、サーミスタで構成された内側温度センサ３１ｄがトッププレート２の下面に密着して取り付けられており、加熱コイル３の上方に載せられた鍋３０の中心部近傍の温度を測定する。   As shown in FIG. 3, an inner temperature sensor 31 d formed of a thermistor is attached in close contact with the lower surface of the top plate 2 in the vicinity of the center portion of the inner heating coil 31 a and is placed above the heating coil 3. The temperature in the vicinity of the center of the pan 30 is measured.

加熱コイル３の隙間３１ｂには、夫々一定の間隔を保持して、最も好ましくは等間隔に三個以上（本実施例では三個で説明する）のサーミスタで構成された外側温度センサ３１ｅ，３１ｆ，３１ｇがギャップスペーサー１０に緩衝材を介して取り付けられて設けられている。   Each of the gaps 31b of the heating coil 3 is held at a constant interval, and most preferably, the outer temperature sensors 31e and 31f are composed of three or more thermistors (illustrated in the present embodiment with three) at regular intervals. , 31g are attached to the gap spacer 10 via a cushioning material.

なお、外側温度センサ３１ｅ，３１ｆ，３１ｇは、加熱コイル３の隙間３１ｂに限定して配設されるものではなく、加熱コイル３の上面とトッププレート２の下面との間に後記ギャップスペーサー１０による隙間が保持されるので、該隙間を利用してそれぞれ適宜な間隔を有して配設してもよい。   The outer temperature sensors 31e, 31f, and 31g are not limited to the gap 31b of the heating coil 3, and are formed by a gap spacer 10 described later between the upper surface of the heating coil 3 and the lower surface of the top plate 2. Since the gap is held, the gap may be used to arrange the gaps at appropriate intervals.

ギャップスペーサー１０は、前記したようにトッププレート２の上面に載置される鍋３０と加熱コイル３とのギャップを一定に保持するためのものであり、コイルベース９の外周縁部に取り付けられた支持部材１１により、コイルベース９上面の外周から中心側に向けて適宜間隔を保持して３個設けられている。   The gap spacer 10 is for holding the gap between the pan 30 placed on the upper surface of the top plate 2 and the heating coil 3 as described above, and is attached to the outer peripheral edge of the coil base 9. Three supporting members 11 are provided at appropriate intervals from the outer periphery of the upper surface of the coil base 9 toward the center.

ギャップスペーサー１０に取り付けられた外側温度センサ３１ｅ，３１ｆ，３１ｇの内、一個（図２に示す外側温度センサ３１ｅ）は、使用者側に近く、鍋３０が載置されやすい筐体１の手前側に配置されている（同様に左側加熱コイル３では外側温度センサ３２ｅとなる）。   Of the outer temperature sensors 31e, 31f, and 31g attached to the gap spacer 10, one (outer temperature sensor 31e shown in FIG. 2) is close to the user side and the front side of the housing 1 on which the pan 30 is easily placed. (Similarly, the left heating coil 3 becomes the outer temperature sensor 32e).

外側温度センサ３１ｅ，３１ｆ，３１ｇは、内側温度センサ３１ｄに対して１２０度ずつずれて配置されている。   The outer temperature sensors 31e, 31f, and 31g are arranged 120 degrees apart from the inner temperature sensor 31d.

ギャップスペーサー１０に取り付けられた外側温度センサ３１ｅ，３１ｆ，３１ｇ，３２ｅ，３２ｆ，３２ｇは、コイルベース９がトッププレート２方向にバネにより付勢されているため、トッププレート２の下面に密着している。   The outside temperature sensors 31e, 31f, 31g, 32e, 32f, and 32g attached to the gap spacer 10 are in close contact with the lower surface of the top plate 2 because the coil base 9 is biased by a spring in the direction of the top plate 2. Yes.

なお、中央後部に配設された加熱コイル３は、加熱コイル３の外形が小さいため、隙間３３ｂには温度センサは設けられていない。   Note that the heating coil 3 disposed in the central rear portion has no small temperature sensor because the outer shape of the heating coil 3 is small.

左右に配設された加熱コイル３の中心部近傍の下方には、鍋３０の底面から放射される赤外線をトッププレート２を通して受光し、その受光した赤外線のエネルギーから温度を測定する赤外線センサ１２，１３が設けられている。   Below the center of the heating coil 3 disposed on the left and right sides, an infrared sensor 12 that receives infrared rays emitted from the bottom surface of the pan 30 through the top plate 2 and measures the temperature from the received infrared energy. 13 is provided.

なお、中央後部に配設された加熱コイル３には、赤外線センサは設けられていない。これは中央後部の加熱コイル３は限られた調理用に用途が限定されているためである。   In addition, the infrared coil is not provided in the heating coil 3 arrange | positioned in the center rear part. This is because the heating coil 3 at the center rear part is limited in use for limited cooking.

赤外線センサ１２の受光面１２ａは、内側加熱コイル３１ａの中心部近傍の位置で、加熱コイル３下方のトッププレート２の下面から約３５mm離れた位置に設けられている。   The light receiving surface 12a of the infrared sensor 12 is provided at a position in the vicinity of the center portion of the inner heating coil 31a and at a position approximately 35 mm away from the lower surface of the top plate 2 below the heating coil 3.

赤外線センサ１２，１３は、熱型検出素子を使用した方式のセンサである。また、その受光面１２ａには図示していないが測定する赤外線の視野角を制限するレンズや導光筒等が設けられ、図３に示すようにトッププレート２の下面の位置で１０φから１５φの温度検出スポット１２ｂによって検出するような視野角としている。   The infrared sensors 12 and 13 are sensors using a thermal detection element. Further, although not shown, the light receiving surface 12a is provided with a lens, a light guide tube, or the like that limits the viewing angle of infrared rays to be measured. As shown in FIG. The viewing angle is detected by the temperature detection spot 12b.

なお、赤外線センサ１２，１３で検知する温度は、鍋３０から放射する赤外線をトッププレート２を通して受光するため、本実施例では、結晶化ガラス製のトッププレート２の赤外線透過波長特性から１５０℃程度の温度の低い範囲は検出しにくいといった性質がある。   In addition, since the infrared rays radiated from the pan 30 are received through the top plate 2, the temperature detected by the infrared sensors 12 and 13 is about 150 ° C. from the infrared transmission wavelength characteristics of the crystallized glass top plate 2 in this embodiment. The low temperature range is difficult to detect.

これらにより、鍋３０の温度を検出して行う自動調理は、トッププレート２を介して検出する内側温度センサ３１ｄと、外側温度センサ３１ｅ，３１ｆ，３１ｇと、内側加熱コイル３１ａの中心部近傍の下方に設けられた赤外線センサ１２により温度を検出して行われる。   Thus, the automatic cooking performed by detecting the temperature of the pan 30 is performed under the inner temperature sensor 31d, the outer temperature sensors 31e, 31f, and 31g that are detected via the top plate 2 and the vicinity of the center portion of the inner heating coil 31a. This is carried out by detecting the temperature with the infrared sensor 12 provided in FIG.

次に、鍋の加熱制御について図３を用いて簡単に説明する。なお、グリル加熱部６の制御については本発明とは直接関係ないので、図３では省略している。   Next, the heating control of the pan will be briefly described with reference to FIG. Note that the control of the grill heating unit 6 is not directly related to the present invention, and is omitted in FIG.

操作部７で入力されたメニュー，出力情報，調理のスタート・切情報等は、制御手段１４に入力される。   Menus, output information, cooking start / off information, and the like input by the operation unit 7 are input to the control means 14.

制御手段１４は、認識した操作部７の情報や調理の進行状況等を表示信号として表示部８に送り、表示部８で表示する。   The control means 14 sends the recognized information of the operation unit 7 and the progress of cooking to the display unit 8 as a display signal and displays it on the display unit 8.

制御手段１４は、操作部７で設定された内容及び事前に組み込まれた自動調理などのプログラムに基づき、インバータ１５を制御して加熱コイル３へ高周波電流を流して電力を供給し、加熱コイル３上の鍋３０を誘導加熱する。   The control means 14 controls the inverter 15 based on the contents set in the operation unit 7 and a program such as automatic cooking incorporated in advance, and supplies power by supplying a high-frequency current to the heating coil 3. The upper pan 30 is induction-heated.

さらに、制御手段１４は、加熱コイル３に設けられた内側温度センサ３１ｄと外側温度センサ３１ｅ，３１ｆ，３１ｇと、加熱コイル３の下方に設けられた赤外線センサ１２の出力信号を入力して温度を検出する温度検出手段１６の温度情報を入力し、インバータ１５を制御して加熱コイル３に高周波電流を流して電力を供給し、鍋３０が設定温度又は設定出力で加熱されるように加熱制御する。   Furthermore, the control means 14 inputs the output signals of the inner temperature sensor 31d and the outer temperature sensors 31e, 31f, and 31g provided in the heating coil 3 and the infrared sensor 12 provided below the heating coil 3 to control the temperature. The temperature information of the temperature detecting means 16 to be detected is input, the inverter 15 is controlled, a high-frequency current is supplied to the heating coil 3 to supply power, and heating control is performed so that the pan 30 is heated at the set temperature or set output. .

なお、温度検出手段１６とインバータ１５は、夫々の加熱コイル３に対応して３個備えているが、制御手段１４は全体を１個で構成している。   In addition, although the temperature detection means 16 and the inverter 15 are provided with three corresponding to each heating coil 3, the control means 14 comprises the whole.

以上のように構成された誘導加熱調理器について、図３，図４を参照しながらその動作を説明する。図４は、実施例１における制御動作説明図である。   About the induction heating cooking appliance comprised as mentioned above, the operation | movement is demonstrated referring FIG. 3, FIG. FIG. 4 is an explanatory diagram of a control operation in the first embodiment.

一例として、鍋３０で揚げ物調理を行う場合、制御手段１４は、内側温度センサ３１ｄと、外側温度センサ３１ｅ，３１ｆ，３１ｇ及び赤外線センサ１２が検知した鍋３０の温度を比較し、一番高い温度を検知したセンサの検出信号を優先して鍋３０の加熱制御を行う。   As an example, when fried food is cooked in the pan 30, the control means 14 compares the temperature of the pan 30 detected by the inner temperature sensor 31d, the outer temperature sensors 31e, 31f, 31g and the infrared sensor 12, and the highest temperature. The heating control of the pan 30 is performed with priority given to the detection signal of the sensor that has detected.

図４に示すように、赤外線センサ１２は、トッププレート２を透過して鍋３０の底部の温度を直接検知するのに対し、内側温度センサ３１ｄと、外側温度センサ３１ｅ，３１ｆ，３１ｇは、トッププレート２を介して鍋３０の底部の温度を検知するので、両センサ１２，３１ｄ，３１ｅ，３１ｆ，３１ｇの間には図示するように時間的遅れが生じる。   As shown in FIG. 4, the infrared sensor 12 transmits the top plate 2 and directly detects the temperature of the bottom of the pan 30, whereas the inner temperature sensor 31 d and the outer temperature sensors 31 e, 31 f, 31 g Since the temperature at the bottom of the pan 30 is detected via the plate 2, a time delay occurs between the sensors 12, 31d, 31e, 31f, and 31g as shown in the figure.

従って赤外線センサ１２が一番高い温度を検知することになり、赤外線センサ１２による温度検出手段１６の出力を優先して加熱制御を行う。   Therefore, the infrared sensor 12 detects the highest temperature, and the heating control is performed with priority given to the output of the temperature detecting means 16 by the infrared sensor 12.

但し、この調理の途中で、例えばトッププレート２が汚れて赤外線センサ１２の受光部に赤外線が受光されにくくなった場合や、鍋３０の置く位置が移動すること等により、外側温度センサ３１ｅが一番高い温度を検知するようになると、以後の制御手段１４の加熱制御は、外側温度センサ３１ｅによる温度検出手段１６の出力を優先して加熱制御を行う。   However, during this cooking, for example, when the top plate 2 becomes dirty and it becomes difficult for infrared rays to be received by the light receiving portion of the infrared sensor 12, or when the position where the pan 30 is placed moves, the outer temperature sensor 31e becomes one. When the highest temperature is detected, the subsequent heating control of the control means 14 is performed with priority given to the output of the temperature detection means 16 by the outer temperature sensor 31e.

このように、調理温度の高い揚げ物調理を行う場合には、鍋３０の底部の温度を直接検知する赤外線センサ１２の出力を優先することで鍋３０の温度検知精度が向上し、揚げ物調理を良好に行うことができる。   Thus, when fried food cooking with a high cooking temperature is performed, the temperature detection accuracy of the pan 30 is improved by giving priority to the output of the infrared sensor 12 that directly detects the temperature of the bottom of the pan 30, and fried food cooking is good. Can be done.

また、一方、赤外線を透過する部分のトッププレート２の汚れや、鍋３０の材質による赤外線の放射率の差、鍋３０の表面の汚れ等により、赤外線センサ１２が鍋３０の温度検知に問題が生じた場合は、内側温度センサ３１ｄと、外側温度センサ３１ｅ，３１ｆ，３１ｇの内で一番高い温度を検知したセンサの検出信号を優先して鍋３０の加熱制御を行うことにより、鍋３０の必要以上な温度上昇による空焼きや煙等の発生を抑制することができる。   On the other hand, the infrared sensor 12 has a problem in detecting the temperature of the pan 30 due to dirt on the top plate 2 at a portion that transmits infrared rays, a difference in infrared emissivity depending on the material of the pan 30, dirt on the surface of the pan 30, and the like. When it occurs, the heating control of the pot 30 is performed by giving priority to the detection signal of the sensor that detects the highest temperature among the inner temperature sensor 31d and the outer temperature sensors 31e, 31f, and 31g. It is possible to suppress the occurrence of baking or smoke due to an unnecessarily high temperature rise.

また、鍋３０の中心部や周辺部が反っている場合には、鍋３０とトッププレート２間にできた空間により、鍋３０の熱がトッププレート２に伝わりにくく、したがって、その部分に配設された内側温度センサ３１ｄや、外側温度センサ３１ｅ，３１ｆ，３１ｇは、加熱開始から所定時間経っても温度上昇しないことがある。   Moreover, when the center part and the peripheral part of the pan 30 are warped, the space formed between the pan 30 and the top plate 2 makes it difficult for the heat of the pan 30 to be transmitted to the top plate 2, and therefore is arranged in that portion. The inner temperature sensor 31d and the outer temperature sensors 31e, 31f, and 31g may not rise in temperature even after a predetermined time from the start of heating.

したがって、このような場合は、内側温度センサ３１ｄと、外側温度センサ３１ｅ，３１ｆ，３１ｇ及び赤外線センサ１２が検知した温度を比較し、一番高い温度を検知したセンサの検出信号を優先して鍋３０の加熱制御を行うことにより、鍋３０の反りに影響を受けにくい赤外線センサ１２の検出信号が一番高い温度を検知するようになると、この赤外線センサ１２の検出信号を優先して鍋３０の加熱制御を行うことができるため、鍋３０の必要以上な温度上昇による空焼きや煙等の発生を抑制することができる。   Therefore, in such a case, the temperature detected by the inner temperature sensor 31d, the outer temperature sensors 31e, 31f, 31g and the infrared sensor 12 is compared, and the detection signal of the sensor detecting the highest temperature is given priority. When the detection signal of the infrared sensor 12 which is not easily affected by the warp of the pan 30 is detected by performing the heating control of the pan 30, priority is given to the detection signal of the infrared sensor 12 of the pan 30. Since heating control can be performed, generation | occurrence | production of the air baking, smoke, etc. by the temperature rise more than necessary of the pan 30 can be suppressed.

次に、湯沸しや煮物等、比較的低い温度で調理する場合には、赤外線センサ１２は結晶化ガラス製のトッププレート２の赤外線透過波長特性から温度の低い範囲は検出しにくいといった性質があることから、内側温度センサ３１ｄや、外側温度センサ３１ｅ，３１ｆ，３１ｇの検知した温度情報で加熱制御を行う。   Next, when cooking at a relatively low temperature such as boiling water or boiled food, the infrared sensor 12 has the property that it is difficult to detect a low temperature range from the infrared transmission wavelength characteristics of the top plate 2 made of crystallized glass. Therefore, the heating control is performed based on the temperature information detected by the inner temperature sensor 31d and the outer temperature sensors 31e, 31f, and 31g.

但し、調理中に鍋３０内の湯や煮汁が少なくなる等の事態が生じると、鍋３０の温度が上昇して高温になり、その温度を赤外線センサ１２が検知し、加熱制御することができるため、鍋３０の必要以上の温度上昇による空焼きや煙等の発生を抑制することができる。   However, when a situation such as the amount of hot water or broth in the pan 30 decreases during cooking, the temperature of the pan 30 rises to a high temperature, and the infrared sensor 12 detects the temperature and can control the heating. Therefore, generation | occurrence | production of the sky baking, smoke, etc. by the temperature rise more than the necessity of the pan 30 can be suppressed.

このように、本実施例では、内側温度センサ３１ｄと、外側温度センサ３１ｅ，３１ｆ，３１ｇの各センサの温度検出特性と、赤外線センサ１２の温度検出特性のそれぞれの特性の違いを取り入れて鍋３０の加熱制御を行うことにより、調理温度の違いや調理物の量及び鍋の大きさや鍋３０の置く位置によっても鍋３０の温度を正確に検知し、調理を良好に行うことができる。   As described above, in this embodiment, the difference between the temperature detection characteristics of each of the inner temperature sensor 31d and the outer temperature sensors 31e, 31f, and 31g and the temperature detection characteristic of the infrared sensor 12 is introduced. By performing the heating control, the temperature of the pan 30 can be accurately detected by the difference in cooking temperature, the amount of the cooked item, the size of the pan, and the position where the pan 30 is placed, and cooking can be performed satisfactorily.

また、鍋３０の必要以上な温度上昇による空焼きや煙等の発生を抑制することができる。   Moreover, generation | occurrence | production of the air baking, smoke, etc. by the temperature rise more than necessary of the pan 30 can be suppressed.

本発明の実施例における誘導加熱調理器の外観斜視図である。It is an external appearance perspective view of the induction heating cooking appliance in the Example of this invention. 本発明の実施例における誘導加熱調理器のトッププレートを除いた状態の上面図である。It is a top view of the state which removed the top plate of the induction heating cooking appliance in the Example of this invention. 本発明の実施例における誘導加熱調理器の右側に配設された加熱コイルの要部縦断面図である。It is a principal part longitudinal cross-sectional view of the heating coil arrange | positioned at the right side of the induction heating cooking appliance in the Example of this invention. 本発明の実施例における制御動作説明図である。It is control operation explanatory drawing in the Example of this invention.

符号の説明Explanation of symbols

１ 筐体
２ トッププレート
３ 加熱コイル
１２，１３ 赤外線センサ
１４ 制御手段
１５ インバータ
３１ｄ，３２ｄ，３３ｄ 内側温度センサ
３１ｅ，３１ｆ，３１ｇ，３２ｅ，３２ｆ，３２ｇ 外側温度センサ DESCRIPTION OF SYMBOLS 1 Case 2 Top plate 3 Heating coil 12, 13 Infrared sensor 14 Control means 15 Inverter 31d, 32d, 33d Inner temperature sensor 31e, 31f, 31g, 32e, 32f, 32g Outer temperature sensor

Claims (2)

筐体の上面に被加熱物を載置するトッププレートを配置し、該トッププレート下方の前記筐体内に環状に形成された加熱コイルと、該加熱コイルに電力を供給するインバータとを備えた誘導加熱調理器において、前記加熱コイル中心部近傍に設けられ前記トッププレートの下面温度を検出する内側温度センサと、前記加熱コイルの外周部より内側に３個以上設けられ前記トッププレートの下面温度を検出する外側温度センサと、前記加熱コイルの中心部近傍の下方に設けられ、前記被加熱物から放射される赤外線を検出する赤外線センサと、前記内側温度センサと前記外側温度センサと前記赤外線センサとの検出信号を基に、前記インバータを制御して前記被加熱物を加熱制御する制御手段とを設けたことを特徴とする誘導加熱調理器。   An induction including a top plate on which an object to be heated is placed on an upper surface of a housing, a heating coil formed in an annular shape in the housing below the top plate, and an inverter that supplies power to the heating coil In the cooking device, an inner temperature sensor provided near the center of the heating coil for detecting the lower surface temperature of the top plate, and three or more inner temperature sensors provided on the inner side of the outer periphery of the heating coil for detecting the lower surface temperature of the top plate. An outer temperature sensor, an infrared sensor that is provided below the vicinity of the center of the heating coil and detects infrared rays emitted from the object to be heated, the inner temperature sensor, the outer temperature sensor, and the infrared sensor. An induction cooking device, comprising: a control means for controlling the heating of the article to be heated by controlling the inverter based on a detection signal. 請求項１記載の誘導加熱調理器において、前記制御手段は、前記内側温度センサと外側温度センサと赤外線センサの各センサが検知した温度を比較し、一番高い温度を検知したセンサの検出信号出力を優先して前記被加熱物を加熱制御することを特徴とする誘導加熱調理器。   The induction heating cooker according to claim 1, wherein the control means compares the temperatures detected by the inner temperature sensor, the outer temperature sensor, and the infrared sensor, and outputs a detection signal of the sensor that detects the highest temperature. An induction heating cooker characterized in that the object to be heated is controlled with priority given to.
JP2008148714A 2008-06-06 2008-06-06 Induction heating cooker Pending JP2009295457A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011204363A (en) * 2010-03-24 2011-10-13 Panasonic Corp Induction heating cooker
JP2012178300A (en) * 2011-02-28 2012-09-13 Sanyo Electric Co Ltd Heating cooker
JP2013041672A (en) * 2011-08-11 2013-02-28 Mitsubishi Electric Corp Induction heating cooker
CN104797024A (en) * 2014-01-22 2015-07-22 日立空调·家用电器株式会社 Induction heating cooking machine
CN109282329A (en) * 2018-09-05 2019-01-29 华帝股份有限公司 Control method of electromagnetic stove
EP4294126A1 (en) * 2022-06-17 2023-12-20 Whirlpool Corporation Induction cooktop with infrared and far-infrared temperature detection

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Publication number Priority date Publication date Assignee Title
JP2004164882A (en) * 2002-11-11 2004-06-10 Matsushita Electric Ind Co Ltd Heating cooker
JP2005216501A (en) * 2004-01-27 2005-08-11 Matsushita Electric Ind Co Ltd Induction heating cooker

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004164882A (en) * 2002-11-11 2004-06-10 Matsushita Electric Ind Co Ltd Heating cooker
JP2005216501A (en) * 2004-01-27 2005-08-11 Matsushita Electric Ind Co Ltd Induction heating cooker

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011204363A (en) * 2010-03-24 2011-10-13 Panasonic Corp Induction heating cooker
JP2012178300A (en) * 2011-02-28 2012-09-13 Sanyo Electric Co Ltd Heating cooker
JP2013041672A (en) * 2011-08-11 2013-02-28 Mitsubishi Electric Corp Induction heating cooker
CN104797024A (en) * 2014-01-22 2015-07-22 日立空调·家用电器株式会社 Induction heating cooking machine
CN109282329A (en) * 2018-09-05 2019-01-29 华帝股份有限公司 Control method of electromagnetic stove
CN109282329B (en) * 2018-09-05 2020-09-04 华帝股份有限公司 Control method of electromagnetic stove
EP4294126A1 (en) * 2022-06-17 2023-12-20 Whirlpool Corporation Induction cooktop with infrared and far-infrared temperature detection
EP4294125A1 (en) * 2022-06-17 2023-12-20 Whirlpool Corporation Induction cooktop with ir temperature detection and transparent spot

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