JP2013131359A - Induction heating cooker - Google Patents
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Abstract
Description
本発明は、一般家庭等で使用される誘導加熱調理器に関する。 The present invention relates to an induction heating cooker used in general households and the like.
近年、この種の誘導加熱調理器には、トッププレート上に載置された調理容器から放射される赤外線を検知する赤外線センサを有し、この赤外線センサの検知信号から温度を算出して加熱コイルへの入力を制御するタイプのものが増えてきている。このような構成の誘導加熱調理器には、トッププレートの下部に赤外線センサを配置し、前記トッププレートには透過率が略ゼロの黒色の遮光層が印刷により形成されており、この遮光層の一部には抜き部が、調理容器から放射される赤外線の入射領域と、前記赤外線センサの近傍に設けられた発光体から出射された光の発光領域として形成されたものがある（例えば、特許文献１参照）。 In recent years, this type of induction heating cooker has an infrared sensor that detects infrared rays radiated from a cooking vessel placed on a top plate, calculates the temperature from the detection signal of the infrared sensor, and heats the coil There is an increasing number of types that control the input to the. In an induction heating cooker having such a configuration, an infrared sensor is disposed below the top plate, and a black light-shielding layer having substantially zero transmittance is formed on the top plate by printing. In some cases, a punched portion is formed as an infrared incident area radiated from a cooking container and an emission area of light emitted from a light emitter provided in the vicinity of the infrared sensor (for example, a patent) Reference 1).
前記トッププレートにおける前記発光領域は前記発光体の光をトッププレート方向に導く導光体の真上に位置し、前記赤外線入射領域の手前側に設けられている。ユーザがこの誘導加熱調理器の電源スイッチを投入すると、発光体が発光してその出射光が導光体に導かれてトッププレートの赤外線入射領域の近傍の発光領域に照射される。ユーザは、発光体の出射光により発光領域を容易に視認し、発光領域を塞ぐように調理容器をトッププレート上に載置し、これにより赤外線入射領域が調理容器により塞がれて、赤外線センサは、調理容器の底面から放射される赤外線を確実に受光できる。 The light emitting region in the top plate is located immediately above the light guide that guides the light of the light emitter in the top plate direction, and is provided on the near side of the infrared incident region. When the user turns on the power switch of the induction heating cooker, the light emitter emits light, and the emitted light is guided to the light guide to irradiate the light emitting area near the infrared incident area of the top plate. The user can easily visually recognize the light emitting area by the light emitted from the light emitter and place the cooking container on the top plate so as to close the light emitting area, whereby the infrared incident area is blocked by the cooking container. Can reliably receive infrared rays emitted from the bottom surface of the cooking container.
このような従来の誘導加熱調理器の構成は、ユーザが調理容器を赤外線センサから外れた位置に載置するリスクを軽減することができるものであった。 Such a configuration of the conventional induction heating cooker can reduce the risk of the user placing the cooking container at a position away from the infrared sensor.
従来の構成のような誘導加熱調理器は、上記のようにユーザが発光領域を塞ぐように調理容器を載置することにより、近傍の赤外線入射領域も塞がれることを狙ったものである。しかしながら、本構成は発光領域の横方向の幅が赤外線入射領域の横方向の幅よりも狭いため、調理容器が横方向にずれた状態で載置された場合、発光領域が調理容器で隠れていても赤外線入射領域を調理容器で塞ぎきれない場合があった。 The induction heating cooker as in the conventional configuration is intended to close the infrared incident region in the vicinity by placing the cooking container so that the user closes the light emitting region as described above. However, since the horizontal width of the light emitting area is narrower than the horizontal width of the infrared incident area in this configuration, the light emitting area is hidden by the cooking container when the cooking container is placed in a state shifted laterally. In some cases, however, the infrared incident area could not be completely covered with the cooking container.
本発明は、前記従来の課題を解決するもので、ユーザが調理容器のずれに気付きやすく、調理容器が確実に赤外線入射領域をカバーできる誘導加熱調理器を提供することを目的とする。 An object of the present invention is to solve the conventional problems described above, and an object thereof is to provide an induction heating cooker in which a user can easily notice a shift of a cooking container and the cooking container can reliably cover an infrared incident region.
前記従来の課題を解決するために、加熱コイルを少なくとも内コイルと外コイルの２つのコイル部で構成し、赤外線センサおよび発光体は上方から見た前記内コイルと前記外コイルの間に位置させ、発光領域の横方向の幅を赤外線入射領域の横方向の幅よりも大きくする構成とした。 In order to solve the conventional problem, the heating coil is composed of at least two coil portions of an inner coil and an outer coil, and the infrared sensor and the light emitter are positioned between the inner coil and the outer coil as viewed from above. The lateral width of the light emitting region is configured to be larger than the lateral width of the infrared incident region.
このように、内コイルと外コイルの間の限られた空間に赤外線センサと発光体を配置し
た構成において、赤外線センサの赤外線入射領域の横幅よりも発光領域の横幅を広くしたことにより、調理容器が横方向にずれた場合には、光が調理容器の底面端部から漏れるため、ユーザが調理容器のずれに気付きやすく、調理容器が確実に赤外線入射領域をカバーできる構成となる。
Thus, in the structure which has arrange | positioned the infrared sensor and the light-emitting body in the limited space between an inner coil and an outer coil, by making the width of the light emission area | region wider than the width of the infrared incident area of an infrared sensor, a cooking container Since the light leaks from the bottom end of the cooking container when the is shifted laterally, the user can easily notice the deviation of the cooking container, and the cooking container can reliably cover the infrared incident area.
本発明の誘導加熱調理器は、ユーザが調理容器のずれに気付きやすく、調理容器が確実に赤外線入射領域をカバーできるものである。 The induction heating cooker of the present invention allows the user to easily notice the deviation of the cooking container, and the cooking container can reliably cover the infrared incident area.
第１の発明は、本体の上面に設けられ調理容器を載置するトッププレートと、前記トッププレートの下部に設けられ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部に設けられ前記調理容器の底面から放射される赤外線を検知する赤外線センサと、前記赤外線センサの出力から前記調理容器の底面温度を算出する温度算出部と、前記温度算出部の出力に応じて前記加熱コイルの入力制御を行う制御部と、前記トッププレートにおける前記赤外線センサの赤外線入射領域の近傍に設けられた発光領域を光らせるための発光体とを備え、前記加熱コイルは、少なくとも内コイルと外コイルの２つのコイル部を有し、前記赤外線センサおよび前記発光体は、上方から見た前記内コイルと前記外コイルの間に位置し、前記発光領域の横方向の幅を前記赤外線入射領域の横方向の幅よりも大きくしたことにより、調理容器が横方向にずれた場合には、光が調理容器の底面端部から漏れるため、ユーザが調理容器のずれに気付きやすく、調理容器が確実に赤外線入射領域をカバーできる構成となる。 1st invention is provided in the upper surface of a main body which mounts a cooking container, The heating coil which is provided in the lower part of the top plate and heats the cooking container, The cooking which is provided in the lower part of the top plate An infrared sensor for detecting infrared radiation emitted from the bottom surface of the container, a temperature calculation unit for calculating the bottom surface temperature of the cooking container from the output of the infrared sensor, and input control of the heating coil according to the output of the temperature calculation unit And a light emitter for illuminating a light emitting region provided in the vicinity of the infrared incident region of the infrared sensor on the top plate, and the heating coil includes at least two coils, an inner coil and an outer coil The infrared sensor and the light emitter are located between the inner coil and the outer coil as viewed from above, and When the cooking container is displaced laterally by making the width of the direction larger than the lateral width of the infrared incident area, light leaks from the bottom edge of the cooking container, so that the user can shift the cooking container. Therefore, the cooking container can reliably cover the infrared incident area.
第２の発明は、特に、第１の発明の前記発光領域の横方向の幅を縦方向の幅よりも大きくしたことにより、内コイルと外コイルの間の限られたスペースを赤外線センサと発光体の配置スペースとして有効に利用することができるものである。 In the second invention, in particular, the limited width between the inner coil and the outer coil is emitted from the infrared sensor and the light emission by making the width in the horizontal direction of the light emitting region of the first invention larger than the width in the vertical direction. It can be used effectively as a body placement space.
第３の発明は、特に、第２の発明の前記赤外線入射領域を前記加熱コイルの中心よりも手前に配置し、前記発光領域は前記赤外線入射領域よりも手前に配置し、前記発光領域の形状は前記発光体から出射される光を前記トッププレート方向に導く透明樹脂から成る導光体により形成し、前記発光領域における外コイル内周に対向する部位を前記外コイル内周と略同心の円弧形状で形成したことにより、ユーザが調理容器を奥方向にずらした場合においても、光が調理容器の底面端部から漏れるため、ユーザが調理容器のずれに気付きやすく、調理容器が確実に赤外線入射領域をカバーでき、導光体として安価な樹脂を採用しても、高温の外コイルの内周から一定の距離を保つことにより、導光体の温度を耐熱温度よりも低くすることができるものである。 In the third invention, in particular, the infrared incident area of the second invention is arranged in front of the center of the heating coil, the light emitting area is arranged in front of the infrared incident area, and the shape of the light emitting area is Is formed by a light guide made of a transparent resin that guides light emitted from the light emitter toward the top plate, and a portion of the light emitting region that faces the inner periphery of the outer coil is an arc substantially concentric with the inner periphery of the outer coil. By forming in a shape, even when the user shifts the cooking container in the back direction, light leaks from the bottom edge of the cooking container, so that the user can easily notice the deviation of the cooking container, and the cooking container reliably receives infrared rays. Even if inexpensive resin is used as the light guide, the temperature of the light guide can be made lower than the heat-resistant temperature by keeping a certain distance from the inner circumference of the high temperature outer coil. Than is.
第４の発明は、特に、第３の発明の前記発光領域における奥側の形状を奥方向に凸の略円弧形状で形成したことにより、発光領域の形状が中心から横方向に行くに従い徐々に狭くなる構成となるため、発光体の光を導光体により効率よく横方向に拡散させて発光領域を均一に光らせることが可能となり、ユーザの視認性を一層向上させることができるものである。 In the fourth aspect of the invention, in particular, the back side shape of the light emitting region of the third aspect of the invention is formed in a substantially arc shape that is convex in the back direction, so that the shape of the light emitting region gradually increases from the center to the lateral direction. Since it becomes a structure narrowed, it becomes possible to diffuse efficiently the light of a light-emitting body to a horizontal direction with a light guide, and to light-emit a light emitting area uniformly, and a user's visibility can be improved further.
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は本発明の実施の形態１における誘導加熱調理器の横断面図、図２は本発明の実施の形態１における誘導加熱調理器の平面図、図３は本発明の実施の形態１における赤外線センサ近傍部品の平面図を示すものである。
(Embodiment 1)
1 is a cross-sectional view of an induction heating cooker according to Embodiment 1 of the present invention, FIG. 2 is a plan view of the induction heating cooker according to Embodiment 1 of the present invention, and FIG. 3 is according to Embodiment 1 of the present invention. The top view of infrared sensor vicinity components is shown.
図１において、本体１の上面には調理容器２を載置するトッププレート３が設けられ、トッププレート３の下部には、調理容器２を誘導加熱する加熱コイル４が、ＰＢＴ等の耐熱が比較的高い樹脂からなるコイルベース５に支持された状態で配置されている。加熱コイルは内コイル４ａと外コイル４ｂに分割されており、内コイル４ａと外コイル４ｂは電気的に接続されている。本誘導加熱調理器は、感熱素子として、加熱コイル４の中央部にはサーミスタ６を、内コイル４ａと外コイル４ｂのコイル間部には赤外線センサ７を設けている。サーミスタ６は、調理容器２の下部に該当するトッププレート３の裏面に圧接され、検知した温度に応じた信号を出力する。また、赤外線センサ７は調理容器２の下部に該当するトッププレート３の下方に被接触に設けられており、調理容器２の底面から放射される赤外線をトッププレート３の赤外線入射領域１０を通して検知し、検知した温度に応じた信号を出力する。調理容器２の温度算出部８は、それぞれサーミスタ６および赤外線センサ７の出力から温度状態を算出し、制御部９は温度算出部８から得た情報をもとに加熱コイル４への電力供給を制御する。赤外線センサ７とトッププレート３の間にはコイルベース５と一体成型された導光筒１１が設けられており、赤外線入射領域１０から本体１内に入射した赤外線を効率よく赤外線センサ７に導く働きを有している。また、赤外線センサ７を構成するユニットにはＬＥＤ素子等からなる発光体１２が取付けられており、ユーザが使用するために誘導加熱調理器の電源を入れるとトッププレート３方向に光を照射し、トッププレート３の発光領域１３を光らせるようになっている。発光体１２とトッププレート３との間には発光体１２から出射された光を効率よくトッププレート３の発光領域１３に導くために、ポリカーボネート等の透明樹脂から成る導光体１４を設けている。 In FIG. 1, a top plate 3 on which a cooking container 2 is placed is provided on the upper surface of a main body 1, and a heating coil 4 for inductively heating the cooking container 2 is compared with the heat resistance of PBT or the like below the top plate 3. It is arranged in a state where it is supported by a coil base 5 made of a relatively high resin. The heating coil is divided into an inner coil 4a and an outer coil 4b, and the inner coil 4a and the outer coil 4b are electrically connected. This induction heating cooker is provided with a thermistor 6 at the center of the heating coil 4 and an infrared sensor 7 between the inner coil 4a and the outer coil 4b as thermal elements. The thermistor 6 is pressed against the back surface of the top plate 3 corresponding to the lower part of the cooking container 2 and outputs a signal corresponding to the detected temperature. Further, the infrared sensor 7 is provided below the top plate 3 corresponding to the lower part of the cooking container 2, and detects infrared rays radiated from the bottom surface of the cooking container 2 through the infrared incident area 10 of the top plate 3. A signal corresponding to the detected temperature is output. The temperature calculation unit 8 of the cooking container 2 calculates the temperature state from the outputs of the thermistor 6 and the infrared sensor 7, respectively, and the control unit 9 supplies power to the heating coil 4 based on the information obtained from the temperature calculation unit 8. Control. A light guide tube 11 formed integrally with the coil base 5 is provided between the infrared sensor 7 and the top plate 3, and works to efficiently guide the infrared light incident from the infrared incident region 10 into the main body 1 to the infrared sensor 7. have. In addition, the unit constituting the infrared sensor 7 is provided with a light emitter 12 made of an LED element or the like, and when the user turns on the induction heating cooker for use, the light is irradiated in the direction of the top plate 3. The light emitting region 13 of the top plate 3 is made to shine. A light guide 14 made of a transparent resin such as polycarbonate is provided between the light emitter 12 and the top plate 3 in order to efficiently guide the light emitted from the light emitter 12 to the light emitting region 13 of the top plate 3. .
図２において、トッププレートに３に隠れている内コイル４ａと外コイル４ｂは破線で表示している。赤外線入射領域１０は本体１前後方向の加熱コイル４中心線上で、かつ、加熱コイル４中心よりも手前に配置されている。また発光領域１３は加熱コイル４中心線上で、かつ、赤外線入射領域１０よりも手前に配置されている。本実施の形態では発光領域１３の横方向の幅Ａは赤外線入射領域１０の横方向の幅Ｂよりも約１０から２０ｍｍ大きく設定されている。また、発光領域１３の横方向の幅Ａは縦方向の幅Ｃよりも大きくとられており、内コイル４ａと外コイル４ｂの間の限られたスペースに効率よく赤外線入射領域１０と発光領域１３が配置されている。図１における導光体１４は入光部１５から光を取り入れ射光部１６から上方に光を出すため、射光部１６の平面方向から見た形状が発光領域１３の形状と等しくなる。本実施の形態では前述のとおり発光領域１３が横長の形状を取っているため、導光体１４の形状は入光部１５から射光部１６にかけて扇状に広がった形状になっており、発光体１２から出射された光を効率よく横方向に拡散するために、導光体１４の入光部１５表面および射光部１６の表面状態を荒らしている。また図１において、導光筒１１の上部端面と射光部１６はできるかぎりトッププレート３に近付けた方が検知性能上および発光表示性能上有利であるが、本実施の形態ではそれぞれＰＢＴおよびポリカーボネートを採用しているため、熱的に耐えられる位置にとどめておく必要がある。本実施の形態ではこれらの樹脂の耐熱性能上、トッププレート３裏面からの距離をそれぞれ、導光筒１１端面部で約２．５ｍｍ、射光部１６で約４．５ｍｍのギャップを設けている。したがって導光筒１１端面と射光部１６は約２ｍｍのギャップがある。本実施の形態では発光領域１３を赤外線入射領域１０よりも手前に配置しているため、導光筒１１端面が射光部１６よりも高くても、ユーザが斜め手前から発光領域１３を見た場合に導
光筒１１が影になることはなく、良好に発光領域１３外形を表示することができる。
In FIG. 2, the inner coil 4a and the outer coil 4b that are hidden by the top plate 3 are indicated by broken lines. The infrared incident region 10 is disposed on the center line of the heating coil 4 in the front-rear direction of the main body 1 and in front of the center of the heating coil 4. The light emitting area 13 is arranged on the center line of the heating coil 4 and in front of the infrared incident area 10. In the present embodiment, the lateral width A of the light emitting region 13 is set to be approximately 10 to 20 mm larger than the lateral width B of the infrared incident region 10. Further, the lateral width A of the light emitting region 13 is larger than the vertical width C, and the infrared incident region 10 and the light emitting region 13 are efficiently disposed in a limited space between the inner coil 4a and the outer coil 4b. Is arranged. The light guide 14 in FIG. 1 takes in light from the light incident portion 15 and emits light upward from the light emitting portion 16, so that the shape of the light emitting portion 16 viewed from the plane direction is equal to the shape of the light emitting region 13. In the present embodiment, since the light emitting region 13 has a horizontally long shape as described above, the shape of the light guide 14 is a fan-shaped shape extending from the light incident portion 15 to the light emitting portion 16. In order to efficiently diffuse the light emitted from the light in the lateral direction, the surfaces of the light incident portion 15 and the light emitting portion 16 of the light guide 14 are roughened. In FIG. 1, it is advantageous in terms of detection performance and light emission display performance that the upper end face of the light guide tube 11 and the light emitting portion 16 are as close to the top plate 3 as possible, but in this embodiment, PBT and polycarbonate are respectively used. It is necessary to keep it in a position where it can withstand heat. In the present embodiment, the distance from the back surface of the top plate 3 is about 2.5 mm at the end surface portion of the light guide tube 11 and about 4.5 mm is provided at the light emitting portion 16 because of the heat resistance performance of these resins. Therefore, there is a gap of about 2 mm between the end face of the light guide tube 11 and the light emitting portion 16. In the present embodiment, since the light emitting region 13 is arranged in front of the infrared incident region 10, even when the end surface of the light guide tube 11 is higher than the light emitting unit 16, the user views the light emitting region 13 from obliquely in front. Thus, the light guide tube 11 is not shaded and the outer shape of the light emitting region 13 can be displayed well.
図３において、導光筒１１と導光体１４は内コイル４ａと外コイル４ｂの間の限られたスペースに効率よく配置されている。導光体１４の外コイル４ｂの外コイル内周１７に対向する部位１８は外コイル４ｂと略一定の距離を保った同心円の円弧形状で構成されている。また、本実施の形態では導光体１４における奥側の部位１９の形状も外コイル４ｂの外コイル内周１７に対向する部位１８の形状と略対象形状で、奥方向に凸の略円弧形状により形成されている。上記にように形成される導光体１４の形状は、発光によってトッププレート３に照射されるため、図２における発光領域１３の形状と等しくなる。また、導光体１４を保持するコイルベース５と一体で成型された保持枠２０には当てリブ２１がコイルの中心線上に設けられており、当てリブ２１により外コイル４ｂが耐熱温度の比較的低い導光体１４に接近するのを防止している。 In FIG. 3, the light guide tube 11 and the light guide 14 are efficiently arranged in a limited space between the inner coil 4a and the outer coil 4b. A portion 18 of the light guide 14 facing the outer coil inner periphery 17 of the outer coil 4b is formed in a concentric circular arc shape maintaining a substantially constant distance from the outer coil 4b. Further, in the present embodiment, the shape of the back side portion 19 of the light guide 14 is also substantially the same shape as the shape of the portion 18 facing the outer coil inner periphery 17 of the outer coil 4b, and is a substantially arc shape convex in the back direction. It is formed by. The shape of the light guide 14 formed as described above is equivalent to the shape of the light emitting region 13 in FIG. 2 because the top plate 3 is irradiated by light emission. The holding frame 20 formed integrally with the coil base 5 that holds the light guide body 14 is provided with a contact rib 21 on the center line of the coil, and the contact rib 21 causes the outer coil 4b to have a relatively high heat resistance temperature. Access to the lower light guide 14 is prevented.
以上のように構成された誘導加熱調理器の構成について、以下その動作、作用を説明する。 About the structure of the induction heating cooking appliance comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.
ユーザがこの本実施の形態の誘導加熱調理器の電源スイッチ（図示せず）を投入すると、発光体１２が発光してその出射光が導光体１４に導かれてトッププレート３の赤外線入射領域１０の近傍の発光領域１３に照射される。ユーザは、発光体１２の出射光により発光領域１３を容易に視認し、発光領域１３を塞ぐように調理容器２をトッププレート３上に載置し、これにより赤外線入射領域１０が調理容器２により塞がれて、赤外線センサ７は、調理容器２の底面から放射される赤外線を確実に受光できる。 When the user turns on the power switch (not shown) of the induction heating cooker according to the present embodiment, the light emitter 12 emits light, and the emitted light is guided to the light guide 14, and the infrared incident area of the top plate 3. The light emitting region 13 near 10 is irradiated. The user easily visually recognizes the light emitting area 13 by the emitted light of the light emitter 12 and places the cooking container 2 on the top plate 3 so as to close the light emitting area 13, whereby the infrared incident area 10 is moved by the cooking container 2. After being closed, the infrared sensor 7 can reliably receive infrared rays emitted from the bottom surface of the cooking vessel 2.
本実施の形態では、発光領域１３の横方向の幅Ａを赤外線入射領域１０の横方向の幅Ｂよりも大きくしているため、内コイル４ａと外コイル４ｂの間の限られた空間に赤外線センサ７と発光体１２を配置した構成においても、調理容器２が横方向にずれた場合には、光が調理容器２の底面端部から漏れるため、ユーザが調理容器２のずれに気付きやすく、調理容器２が確実に赤外線入射領域１０をカバーできる構成となる。また、本実施の構成では調理容器２の側面と底面で形成されるＲ形状の陰になっていても発光領域１３が光っているため、調理容器２からの発光領域１３のはみ出しを認識しやすい。本実施の形態では発光領域１３の横方向の幅Ａは赤外線入射領域１０の横方向の幅Ｂよりも約１０から２０ｍｍ大きく設定されているため、一般的な調理容器２に見られる側面と底面で形成されるＲ形状（半径１０ｍｍ程度）においても、ユーザが斜めから見た状態では陰になることはない。 In the present embodiment, since the lateral width A of the light emitting region 13 is larger than the lateral width B of the infrared incident region 10, infrared light is limited in a limited space between the inner coil 4a and the outer coil 4b. Even in the configuration in which the sensor 7 and the light emitter 12 are arranged, when the cooking container 2 is displaced laterally, light leaks from the bottom end of the cooking container 2, so that the user can easily notice the deviation of the cooking container 2, The cooking container 2 can reliably cover the infrared incident area 10. Further, in the present embodiment, since the light emitting region 13 shines even when it is shaded by the R shape formed by the side surface and the bottom surface of the cooking container 2, it is easy to recognize the protrusion of the light emitting region 13 from the cooking container 2. . In the present embodiment, the lateral width A of the light emitting region 13 is set to be approximately 10 to 20 mm larger than the lateral width B of the infrared incident region 10, so that the side surface and the bottom surface that are found in a general cooking container 2 Even in the R shape (with a radius of about 10 mm) formed by the above, there is no shadow when viewed by the user from an oblique direction.
なお、本実施の形態では赤外線入射領域１０の手前に発光領域１３を設けた位置関係としたが、上記横方向のずれに対する効果は、上記と反対の位置関係すなわち赤外線入射領域１０の奥側に発光領域１３を設けた場合でも得られる。また、本実施の形態では赤外線入射領域１０を加熱コイル４中心より手前に配置したが、上記横方向のずれに対する効果は、上記と反対の位置関係すなわち加熱コイル４中心より奥側に赤外線入射領域１０を設けた場合でも得られる。 In the present embodiment, the light emitting region 13 is provided in front of the infrared incident region 10, but the effect on the lateral displacement is opposite to the above, that is, on the far side of the infrared incident region 10. Even when the light emitting region 13 is provided, it can be obtained. Further, in the present embodiment, the infrared incident region 10 is disposed in front of the center of the heating coil 4, but the effect on the lateral displacement is the opposite of the above, that is, the infrared incident region on the far side from the center of the heating coil 4. Even when 10 is provided.
また、本実施の形態では発光領域１３の横方向の幅Ａを縦方向の幅Ｃよりも大きくしたことにより、内コイル４ａと外コイル４ｂの間の限られたスペースを赤外線センサ７と発光体１２の配置スペースとして有効に利用することができるものである。 In the present embodiment, since the lateral width A of the light emitting region 13 is made larger than the longitudinal width C, the limited space between the inner coil 4a and the outer coil 4b is limited to the infrared sensor 7 and the light emitter. It can be effectively used as 12 arrangement spaces.
また、本実施の形態では赤外線入射領域１０を前記加熱コイル４の中心よりも手前に配置し、前記発光領域１３は前記赤外線入射領域１０よりも手前に配置している。したがってユーザが調理容器２を奥方向にずらした場合においても、光が調理容器２の底面端部から漏れるため、ユーザが調理容器２のずれに気付きやすく、調理容器２が確実に赤外線入
射領域１０をカバーできる。なお、一般的な調理容器２に見られる側面と底面で形成されるＲ形状（半径１０ｍｍ程度）においても、ユーザが斜めから見た状態では陰になることはなく使用できるために、赤外線入射領域１０の手前端部から発光領域１３の手前端部までの距離は５ｍｍ前後であることが望ましい。
In the present embodiment, the infrared incident region 10 is disposed in front of the center of the heating coil 4, and the light emitting region 13 is disposed in front of the infrared incident region 10. Therefore, even when the user shifts the cooking container 2 in the back direction, light leaks from the bottom end of the cooking container 2, so that the user can easily notice the deviation of the cooking container 2, and the cooking container 2 is surely in the infrared incident region 10. Can cover. In addition, even in the R shape (radius of about 10 mm) formed by the side surface and the bottom surface seen in the general cooking container 2, it can be used without being shaded when viewed by the user from an oblique direction. The distance from the front end portion of 10 to the front end portion of the light emitting region 13 is preferably about 5 mm.
また、発光領域１３の形状は発光体１２から出射される光をトッププレート３方向に導く透明樹脂から成る導光体１４により形成し、発光領域１３における外コイル４ｂの外コイル内周１７に対向する部位を外コイル４ｂの外コイル内周１７と略同心の円弧形状で形成したことにより、導光体１４として安価な樹脂を採用しても、高温の外コイル４ｂの外コイル内周１７から一定の距離を保つことにより、導光体１４の温度を耐熱温度よりも低くすることができるものである。なお、上記一定の距離は本実施の形態では約５ｍｍ確保している。 The shape of the light emitting region 13 is formed by a light guide 14 made of a transparent resin that guides light emitted from the light emitter 12 in the direction of the top plate 3, and faces the outer coil inner periphery 17 of the outer coil 4 b in the light emitting region 13. Since the portion to be formed is formed in a circular arc shape that is substantially concentric with the outer coil inner periphery 17 of the outer coil 4b, even if an inexpensive resin is adopted as the light guide body 14, the outer coil inner periphery 17 of the high temperature outer coil 4b By maintaining a certain distance, the temperature of the light guide 14 can be made lower than the heat resistant temperature. In the present embodiment, the fixed distance is about 5 mm.
また、本実施の形態では発光領域１３における奥側の形状を奥方向に凸の略円弧形状で形成したことにより、発光領域１３の形状が中心から横方向に行くに従い徐々に狭くなる構成となるため、発光体１２の光を導光体１４により効率よく横方向に拡散させて発光領域を均一に光らせることが可能となり、ユーザの視認性を一層向上させることができるものである。 Moreover, in this Embodiment, the shape of the back | inner side in the light emission area | region 13 was formed in the substantially circular arc shape convex in the back | inner direction, and it becomes a structure which the shape of the light emission area | region 13 becomes narrow gradually as it goes to a horizontal direction from the center. Therefore, the light of the light emitting body 12 can be efficiently diffused in the lateral direction by the light guide body 14 so that the light emitting region can be uniformly illuminated, and the visibility of the user can be further improved.
なお、発光領域１３の形状として図４（ａ）半周の円弧、（ｂ）略６０度の弓形、（ｃ）略６０度の円弧に示すような形状でも、内コイル４ａと外コイル４ｂの間の限られたコイル間に赤外線入射領域１０と発光領域１３を設けた状態において導光体１４の耐熱を確保しながら調理容器２の横ずれを防止する効果が得られる。 It should be noted that the shape of the light emitting region 13 may be a shape as shown in FIG. 4 (a) a half-circular arc, (b) an arc of approximately 60 degrees, and (c) an arc of approximately 60 degrees, between the inner coil 4a and the outer coil 4b. In the state where the infrared incident region 10 and the light emitting region 13 are provided between the limited coils, an effect of preventing the lateral displacement of the cooking vessel 2 while ensuring the heat resistance of the light guide 14 can be obtained.
ただし、（ａ）の場合は発光領域１３が円弧状に大きく伸びるため、発光体１２の数を増やして発光領域１３を均一に光らせる必要がある。また、（ｂ）および（ｃ）は発光領域１３の中心部に設けた発光体１２の光の横方向への広がりが本実施の形態よりも少なくなり、発光の均一性が若干低下する。 However, in the case of (a), since the light emitting region 13 extends greatly in an arc shape, it is necessary to increase the number of the light emitters 12 so that the light emitting region 13 is uniformly illuminated. In (b) and (c), the light emitter 12 provided at the center of the light emitting region 13 spreads less in the lateral direction than in the present embodiment, and the uniformity of light emission is slightly reduced.
以上のように、本発明にかかる誘導加熱調理器は、被加熱物の正確な温度検知が可能となり、ユーザの使い勝手をよくすることができるので、センサを用いる類似の構成をとる全ての用途に適用できる。 As described above, the induction heating cooker according to the present invention can accurately detect the temperature of an object to be heated and can improve the user's convenience, so that it can be used for all applications having a similar configuration using a sensor. Applicable.
１ 本体
２ 調理容器
３ トッププレート
４ 加熱コイル
４ａ 内コイル
４ｂ 外コイル
７ 赤外線センサ
８ 温度算出部
９ 制御部
１０ 赤外線入射領域
１２ 発光体
１３ 発光領域
１４ 導光体
１７ 外コイル内周
DESCRIPTION OF SYMBOLS 1 Main body 2 Cooking container 3 Top plate 4 Heating coil 4a Inner coil 4b Outer coil 7 Infrared sensor 8 Temperature calculation part 9 Control part 10 Infrared incident area 12 Light emitter 13 Light emitting area 14 Light guide 17 Inner circumference of outer coil
Claims (4)
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| JP2011279422A JP2013131359A (en) | 2011-12-21 | 2011-12-21 | Induction heating cooker |
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| Application Number | Priority Date | Filing Date | Title |
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| JP2011279422A JP2013131359A (en) | 2011-12-21 | 2011-12-21 | Induction heating cooker |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008120448A1 (en) * | 2007-03-12 | 2008-10-09 | Panasonic Corporation | Induction cooking device |
| JP2011060782A (en) * | 2010-12-24 | 2011-03-24 | Panasonic Corp | Induction heating device |
| JP2011243407A (en) * | 2010-05-18 | 2011-12-01 | Mitsubishi Electric Corp | Heating cooker |
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2011
- 2011-12-21 JP JP2011279422A patent/JP2013131359A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008120448A1 (en) * | 2007-03-12 | 2008-10-09 | Panasonic Corporation | Induction cooking device |
| JP2011243407A (en) * | 2010-05-18 | 2011-12-01 | Mitsubishi Electric Corp | Heating cooker |
| JP2011060782A (en) * | 2010-12-24 | 2011-03-24 | Panasonic Corp | Induction heating device |
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