JP6008888B2 - Heating cooker and heating control method - Google Patents

Heating cooker and heating control method Download PDF

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JP6008888B2
JP6008888B2 JP2014026014A JP2014026014A JP6008888B2 JP 6008888 B2 JP6008888 B2 JP 6008888B2 JP 2014026014 A JP2014026014 A JP 2014026014A JP 2014026014 A JP2014026014 A JP 2014026014A JP 6008888 B2 JP6008888 B2 JP 6008888B2
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temperature
rice
heating
heated
container
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JP2015150180A (en
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ちひろ 河東
ちひろ 河東
永田 滋之
滋之 永田
百合子 杉山
百合子 杉山
久保田 哲正
哲正 久保田
守岩 和秋
和秋 守岩
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Mitsubishi Electric Home Appliance Co Ltd
Mitsubishi Electric Corp
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Mitsubishi Electric Home Appliance Co Ltd
Mitsubishi Electric Corp
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Description

本発明は、米等の食品を入れた鍋状容器を加熱調理する加熱調理器及び加熱制御方法に関するものである。   The present invention relates to a heating cooker and a heating control method for cooking a pan-like container containing food such as rice.

健康志向の高まりに伴い玄米食が見直されて久しいが、玄米には皮(種皮や果皮)があるため、「炊飯時間が長い」、「皮がボソボソして美味しくない」といった点で好まれないことが多い。   Although brown rice food has been reviewed for a long time due to health-consciousness, brown rice has skin (seed coat and pericarp), so it is not preferred in terms of “cooking time is long” and “the skin is not so tasty because it is not smooth” There are many cases.

そこで従来、短時間に炊飯し、白米ご飯と同等の食感に炊き上げることを目的に、玄米に水を吸水させる前炊き工程と、玄米の糊化を促進する加熱工程を含む炊飯工程を有し、前記加熱工程において水を加える工程を設けて炊飯する炊飯器が提案されている(例えば、特許文献1参照)。   Therefore, conventionally, for the purpose of cooking rice in a short time and cooking to the same texture as white rice rice, there is a rice cooking process that includes a pre-cooking process that absorbs water into brown rice and a heating process that promotes gelatinization of brown rice And the rice cooker which provides the process of adding water in the said heating process and cooks rice is proposed (for example, refer patent document 1).

特開2011−206364号公報(例えば、請求項1等参照)Japanese Patent Laying-Open No. 2011-206364 (see, for example, claim 1)

しかしながら、特許文献1に記載のように、加熱工程である沸騰中の状態で水を加えると、玄米の皮が破れるのと同時に米粒が割れたりすることで玄米内部の胚乳部のデンプンが炊飯液に溶出し、炊きあがったときには皮と胚乳部が分離してしまい、皮の口当たりが悪くて美味しくないという課題があった。   However, as described in Patent Document 1, when water is added while boiling in the heating process, the brown rice skin is broken and at the same time the rice grains are cracked so that the starch in the endosperm portion inside the brown rice is the rice cooking liquid When the food is cooked and cooked, the skin and the endosperm part are separated, and there is a problem that the taste of the skin is bad and it is not delicious.

本発明は、上記のような課題を解決するためになされたものであり、短時間に美味しい玄米ご飯を炊飯することが可能な加熱調理器及び加熱制御方法を提供することを目的としている。   This invention is made | formed in order to solve the above subjects, and it aims at providing the heating cooker and the heating control method which can cook delicious brown rice rice in a short time.

本発明に係る加熱調理器は、被加熱物を収容する鍋状容器を加熱する加熱手段と、前記加熱手段を制御する制御手段と、を備え、前記制御手段は、前記鍋状容器に前記被加熱物として玄米が収容され、前記玄米を炊き上げる玄米用の炊飯工程で実行される吸水工程において、前記被加熱物の温度が前記玄米の皮の軟化温度以上に到達すると、前記加熱手段への入力を停止し、その後、前記被加熱物の温度を糊化温度以上で保持するものである。 A heating cooker according to the present invention includes heating means for heating a pot-shaped container that accommodates an object to be heated, and control means for controlling the heating means, wherein the control means is provided on the pot-shaped container. In the water absorption process that is performed in the rice cooking process for brown rice that contains brown rice as a heated object and cooks the brown rice, when the temperature of the heated object reaches or exceeds the softening temperature of the brown rice skin, the heating means The input is stopped , and then the temperature of the object to be heated is maintained at the gelatinization temperature or higher .

本発明に係る加熱制御方法は、玄米を炊き上げる玄米用の炊飯工程を備えた加熱制御方法であって、前記炊飯工程で実行される吸水工程において、鍋状容器に収容された被加熱物の温度が玄米の皮の軟化温度以上に到達すると、前記鍋状容器を加熱する加熱手段への入力を停止し、前記加熱手段への入力停止後、前記被加熱物の温度が予め定めた設定温度より低下した場合、前記鍋状容器の温度及び前記被加熱物の温度のいずれか1つの温度情報に基づいて前記被加熱物の温度を予め定めた糊化温度以上で保持するものである。 The heating control method according to the present invention is a heating control method including a rice cooking process for brown rice that cooks brown rice, and in the water absorption process performed in the rice cooking process, the heating object contained in the pot-shaped container When the temperature reaches or exceeds the softening temperature of the brown rice skin, the input to the heating means for heating the pan-like container is stopped, and after the input to the heating means is stopped, the temperature of the object to be heated is a predetermined set temperature. When the temperature is further lowered, the temperature of the heated object is maintained at a predetermined gelatinization temperature or higher based on temperature information of any one of the temperature of the pan-shaped container and the temperature of the heated object .

本発明の加熱調理器及び加熱制御方法によれば、玄米の皮を軟化させて吸水工程を実行することで、短時間に玄米を炊飯することができ、且つ、炊き上がりが美味しい玄米ご飯になる。   According to the heating cooker and the heating control method of the present invention, brown rice can be cooked in a short time and the cooked rice becomes delicious by softening the brown rice skin and performing the water absorption process. .

本発明の実施の形態に係る家庭用IH式炊飯器の構成の一例を概略的に示す断面模式図である。It is a cross-sectional schematic diagram which shows roughly an example of a structure of the household IH type rice cooker which concerns on embodiment of this invention. 本発明の実施の形態に係る家庭用IH式炊飯器の炊飯工程と、被加熱物温度、鍋状容器温度、加熱コイルへの通電電力の推移の一例を示す図である。It is a figure which shows an example of transition of the rice cooking process of the domestic | home-use IH type rice cooker which concerns on embodiment of this invention, and to-be-heated material temperature, pan-shaped container temperature, and the electricity supply to a heating coil. 本発明の実施の形態に係る家庭用IH式炊飯器の炊飯工程を説明するフローチャートである。It is a flowchart explaining the rice cooking process of the household IH type rice cooker which concerns on embodiment of this invention. 本実施の形態とは異なる温度履歴で加熱した吸水工程終了直後の玄米の状態を示すイメージ図である。It is an image figure which shows the state of the brown rice immediately after completion | finish of the water absorption process heated with the temperature history different from this Embodiment. 本発明の実施の形態に係る家庭用IH式炊飯器の吸水工程終了直後の玄米の状態を示すイメージ図である。It is an image figure which shows the state of the brown rice immediately after completion | finish of the water absorption process of the domestic | home-use IH type rice cooker which concerns on embodiment of this invention. 本発明の実施の形態に係る家庭用IH式炊飯器の炊飯工程と、被加熱物温度、鍋状容器温度、加熱コイルへの通電電力の推移の他の一例を示す図である。It is a figure which shows another example of the rice cooking process of the domestic | home-use IH type rice cooker which concerns on embodiment of this invention, and the transition of the to-be-heated material temperature, pan-shaped container temperature, and the electric power supplied to a heating coil.

以下、本発明に係る加熱調理器及び加熱制御方法の実施の形態について、家庭用IH式炊飯器に適用した場合を例に図面を参照しながら説明する。なお、以下に説明する実施の形態によって本発明が限定されるものではない。また、図1を含め、以下の図面では各構成部材の大きさの関係が実際のものとは異なる場合がある。また、以下の説明において、理解を容易にするために方向を表す用語(例えば「上」、「下」、「右」、「左」、「前」、「後」など)を適宜用いるが、これは説明のためのものであって、これらの用語は本発明を限定するものではない。   DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a heating cooker and a heating control method according to the present invention will be described with reference to the drawings, taking as an example a case where the heating cooker and a heating control method are applied to a domestic IH rice cooker. The present invention is not limited to the embodiments described below. Moreover, in the following drawings including FIG. 1, the relationship of the size of each component may be different from the actual one. Further, in the following description, terms for indicating directions (for example, “up”, “down”, “right”, “left”, “front”, “back”, etc.) are used as appropriate for easy understanding. This is for explanation and these terms do not limit the present invention.

図1は、本発明の実施の形態に係る家庭用IH式炊飯器(以下、炊飯器100と称する)の構成の一例を概略的に示す断面模式図である。図1に基づいて、炊飯器100について説明する。この炊飯器100は、被加熱物(本実施の形態では米200及び水201)を入れた鍋状容器5を加熱コイル3で加熱することで被加熱物を炊き上げるものである。   FIG. 1 is a schematic cross-sectional view schematically showing an example of the configuration of a domestic IH rice cooker (hereinafter referred to as a rice cooker 100) according to an embodiment of the present invention. Based on FIG. 1, the rice cooker 100 is demonstrated. The rice cooker 100 cooks the heated object by heating the pot-shaped container 5 containing the heated object (rice 200 and water 201 in the present embodiment) with the heating coil 3.

図1に示すように、炊飯器100は、例えば外観が有底筒状の本体1と、本体1に取り付けられ、本体1の上部開口部を開閉する蓋体10と、を備えている。   As shown in FIG. 1, the rice cooker 100 includes, for example, a bottomed cylindrical main body 1 and a lid 10 that is attached to the main body 1 and opens and closes the upper opening of the main body 1.

(本体1)
本体1は、容器カバー2と、加熱手段としての加熱コイル3と、鍋底温度センサー4と、蓋体10を開閉自在に支持するヒンジ部6と、時間計測手段7と、各部及び各装置を駆動制御して炊飯工程を実行する制御手段8とを備えている。
(Main unit 1)
The main body 1 drives the container cover 2, the heating coil 3 as a heating means, the pan bottom temperature sensor 4, the hinge part 6 that supports the lid 10 so that it can be opened and closed, the time measuring means 7, each part and each device. The control means 8 which controls and performs a rice cooking process is provided.

容器カバー2は、有底筒状に形成されていて、その内部に鍋状容器5が着脱自在に収容されるものである。容器カバー2の底部中央には、鍋底温度センサー4が挿入される孔部2aが設けられている。
なお、鍋状容器5は、誘導加熱により発熱する磁性体の金属を含む材料で構成され、有底円筒形状である。鍋状容器5の上端部外周には、フランジ部5aが形成されている。
The container cover 2 is formed in a bottomed cylindrical shape, and the pot-shaped container 5 is detachably accommodated therein. In the center of the bottom of the container cover 2, a hole 2a into which the pan bottom temperature sensor 4 is inserted is provided.
The pot-like container 5 is made of a material containing a magnetic metal that generates heat by induction heating, and has a bottomed cylindrical shape. A flange portion 5 a is formed on the outer periphery of the upper end portion of the pot-like container 5.

加熱コイル3は、制御手段8により通電制御され、鍋状容器5を誘導加熱するものである。なお、加熱手段として、加熱コイル3に代えてシーズヒーター等の電気ヒーターを設けてもよい。また、図1の例では、鍋状容器5の底面近傍に加熱コイル3を配置しているが、加熱コイル3の配置は図示のものに限定されず、例えば鍋状容器5の底面近傍に加えて鍋状容器5の側面に沿って加熱コイル3を設けてもよい。加熱コイル3が、本発明の「加熱手段」に相当する。   The heating coil 3 is energized and controlled by the control means 8 and induction-heats the pan-like container 5. As a heating means, an electric heater such as a sheathed heater may be provided in place of the heating coil 3. Moreover, in the example of FIG. 1, although the heating coil 3 is arrange | positioned near the bottom face of the pan-like container 5, arrangement | positioning of the heating coil 3 is not limited to the thing of illustration, For example, in addition to the bottom face vicinity of the pan-like container 5 The heating coil 3 may be provided along the side surface of the pan-like container 5. The heating coil 3 corresponds to the “heating means” of the present invention.

鍋底温度センサー4は、例えばサーミスタで構成され、鍋状容器5の温度を検知するものである。鍋底温度センサー4は、バネ等の弾性手段によって上方に付勢されており、容器カバー2に収容された鍋状容器5の底面に接するように構成されている。鍋底温度センサー4が検知した鍋状容器5の温度に関する情報は、制御手段8に出力される。なお、鍋底温度センサー4の具体的構成はサーミスタに限定されず、鍋状容器5に接触して温度を検知する接触式温度センサーのほか、例えば赤外線センサー等の鍋状容器5の温度を非接触で検知する非接触式温度センサーを採用してもよい。   The pan bottom temperature sensor 4 is composed of, for example, a thermistor, and detects the temperature of the pan-like container 5. The pan bottom temperature sensor 4 is biased upward by an elastic means such as a spring and is configured to come into contact with the bottom surface of the pan-like container 5 accommodated in the container cover 2. Information regarding the temperature of the pot-like container 5 detected by the pot bottom temperature sensor 4 is output to the control means 8. The specific configuration of the pan bottom temperature sensor 4 is not limited to the thermistor, and the temperature of the pan-shaped container 5 such as an infrared sensor is not contacted in addition to the contact-type temperature sensor that detects the temperature by contacting the pan-shaped container 5. You may employ | adopt the non-contact-type temperature sensor detected by.

ヒンジ部6は、本体1の上部の一端側(紙面左側)に設けられ、蓋体10を開閉自在に支持するものである。
なお、本体1に、炊飯器100を運搬するためのハンドル(図示省略)を設けておいてもよい。ハンドルを設ける場合には、ハンドルを本体1の側面上部の略前後中央に軸支し、ハンドルの回転方向を蓋体10の回動方向と一致させるとよい。そうすれば、炊飯器100を運搬する際には、使用者はハンドルの軸支点のほぼ直上に位置するようにハンドルを回転させて持ち上げ、ハンドルのみを持って炊飯器100を運搬することが可能となる。
The hinge portion 6 is provided on one end side (left side of the drawing) of the upper portion of the main body 1 and supports the lid body 10 so as to be opened and closed.
In addition, you may provide the main body 1 with the handle (illustration omitted) for conveying the rice cooker 100. FIG. When the handle is provided, the handle may be pivotally supported substantially at the front and rear center of the upper part of the side surface of the main body 1 so that the rotation direction of the handle coincides with the rotation direction of the lid body 10. Then, when transporting the rice cooker 100, the user can lift the handle by rotating the handle so that it is positioned almost directly above the pivot point of the handle, and can transport the rice cooker 100 with only the handle. It becomes.

時間計測手段7は、制御手段8に指示されて経過時間をカウントするようになっている。そして、時間計測手段7がカウントした経過時間は、制御手段8に出力される。   The time measuring means 7 is instructed by the control means 8 and counts the elapsed time. Then, the elapsed time counted by the time measuring means 7 is output to the control means 8.

制御手段8は、鍋底温度センサー4、並びに蓋体10に設けられた操作表示部15及び内部温度センサー16からの出力に基づいて、加熱コイル3に通電する高周波電流を制御する。そのほか、制御手段8は、炊飯器100の動作全般を制御する。制御手段8は、その機能を実現する回路デバイスのようなハードウェアで構成することもできるし、マイコンやCPUのような演算装置と、その上で実行されるソフトウェアとにより構成することもできる。   The control means 8 controls the high-frequency current supplied to the heating coil 3 based on the output from the pan bottom temperature sensor 4 and the operation display unit 15 and the internal temperature sensor 16 provided on the lid 10. In addition, the control means 8 controls the overall operation of the rice cooker 100. The control means 8 can be configured by hardware such as a circuit device that realizes the function, or can be configured by an arithmetic device such as a microcomputer or a CPU and software executed thereon.

(蓋体10)
蓋体10は、外蓋11と、内蓋12と、を有している。外蓋11には、後述するカートリッジ14が着脱自在に設けられ、外蓋11の上面には操作表示部15が設けられている。
(Cover 10)
The lid 10 has an outer lid 11 and an inner lid 12. A cartridge 14 described later is detachably provided on the outer lid 11, and an operation display unit 15 is provided on the upper surface of the outer lid 11.

外蓋11は、蓋体10の上部及び側部を構成し、その下面(鍋状容器5に対向する面)には、内蓋12が着脱自在に取り付けられている。
内蓋12は、例えばステンレスなどの金属で構成されており、外蓋11の本体1側の面に係止材13を介して取り付けられている。内蓋12の周縁部には、鍋状容器5の上端部外周に形成されたフランジ部5aとの密閉性を確保するためのシール材の蓋パッキン9が取り付けられている。また、内蓋12には、内部温度センサー16を挿入させる孔部12aが設けられている。さらに、内蓋12には、鍋状容器5内で発生した蒸気が出入する蒸気口12bが設けられ、後述するカートリッジ14の蒸気取入口14aと通じている。
なお、外蓋11には、内蓋12の孔部12aに挿入された内部温度センサー16の外周の隙間を塞ぐパッキン11aが取り付けられている。
The outer lid 11 constitutes an upper portion and a side portion of the lid body 10, and an inner lid 12 is detachably attached to a lower surface (a surface facing the pan-like container 5).
The inner lid 12 is made of, for example, a metal such as stainless steel, and is attached to the surface of the outer lid 11 on the main body 1 side via a locking member 13. On the peripheral edge of the inner lid 12 is attached a lid packing 9 of a sealing material for ensuring hermeticity with the flange portion 5 a formed on the outer periphery of the upper end portion of the pan-like container 5. Further, the inner lid 12 is provided with a hole 12a into which the internal temperature sensor 16 is inserted. Further, the inner lid 12 is provided with a steam port 12b through which steam generated in the pan-like container 5 enters and exits, and communicates with a steam inlet 14a of the cartridge 14 described later.
Note that a packing 11 a is attached to the outer lid 11 to close a gap on the outer periphery of the internal temperature sensor 16 inserted into the hole 12 a of the inner lid 12.

(カートリッジ14)
カートリッジ14は、外蓋11の上面に着脱自在に設けられている。カートリッジ14には、炊飯中に発生する蒸気圧に応じて上下動する弁(図示せず)を備えた蒸気取入口14aと、蒸気取入口14aの弁を通過した蒸気を外部へ排出する蒸気排出口14bとが設けられている。蒸気取入口14aは蒸気口12bに通じており、蒸気は、蒸気口12bを通過して蒸気取入口14aからカートリッジ14内に入ってカートリッジ14内を流れ、蒸気排出口14bからカートリッジ14の外へ流出する。カートリッジ14内を流れる過程において蒸気は冷却されて復水するので、炊飯器100の外へ流出する蒸気量を減らすことができる。
(Cartridge 14)
The cartridge 14 is detachably provided on the upper surface of the outer lid 11. The cartridge 14 includes a steam inlet 14a having a valve (not shown) that moves up and down according to the steam pressure generated during rice cooking, and a steam exhaust that discharges the steam that has passed through the valve of the steam inlet 14a to the outside. An outlet 14b is provided. The steam inlet 14a communicates with the steam port 12b, and the steam passes through the steam port 12b, enters the cartridge 14 through the steam inlet 14a, flows through the cartridge 14, and exits the cartridge 14 from the steam outlet 14b. leak. Since the steam is cooled and condensed in the process of flowing through the cartridge 14, the amount of steam flowing out of the rice cooker 100 can be reduced.

(操作表示部15)
操作表示部15は、外蓋11の上面に設けられている。この操作表示部15は、使用者からの各種指示(例えば、炊飯の開始、取り消し、予約など)を受け付けるとともに、各種情報(例えば、操作入力に関する情報、炊飯器100の動作状態など)、を表示するものである。操作表示部15に対して設定可能な項目としては、例えば、炊飯の開始、取り消し、炊飯予約、炊飯メニューがある。炊飯メニューの具体例としては、白米炊飯又は玄米炊飯等の米の種類に関するもの、標準炊飯又は早炊き炊飯等の炊飯時間に関するもの、かため又はやわらかめ等の炊き上がりの米飯のかたさに関するもの等が挙げられる。操作表示部15が表示する項目としては、例えば、炊飯中又は予約待機中等の炊飯器100の状態、設定されている炊飯メニューの内容、炊き上がりの予定時刻、現在時刻、炊飯する米の量等が挙げられる。なお、ここで示した操作表示部15の具体的構成は一例であり、本発明を限定するものではない。
(Operation display unit 15)
The operation display unit 15 is provided on the upper surface of the outer lid 11. The operation display unit 15 accepts various instructions from the user (for example, start, cancellation, reservation, etc. of rice cooking) and displays various information (for example, information related to operation input, operation status of the rice cooker 100, etc.). To do. Items that can be set for the operation display unit 15 include, for example, start and cancellation of rice cooking, rice cooking reservation, and rice cooking menu. Specific examples of the rice cooking menu include things related to rice types such as white rice cooking or brown rice cooking, things related to cooking time such as standard rice cooking or quick cooking rice, things related to the hardness of cooked rice such as cracks or soft rice Is mentioned. Items displayed by the operation display unit 15 include, for example, the state of the rice cooker 100 during cooking or reservation standby, the contents of the set rice cooking menu, the scheduled cooking time, the current time, the amount of rice to be cooked, etc. Is mentioned. The specific configuration of the operation display unit 15 shown here is merely an example, and does not limit the present invention.

操作表示部15に対して使用者が操作入力を行うと、本体1に内蔵された制御手段8は、入力された炊飯メニュー及び炊飯する米の量に合わせた炊飯プログラムに従って、加熱コイル3を動作させて炊飯工程を実行する。   When the user performs an operation input to the operation display unit 15, the control means 8 built in the main body 1 operates the heating coil 3 according to the input rice cooking menu and the rice cooking program according to the amount of rice to be cooked. Let the rice cooking process run.

(内部温度センサー16)
内部温度センサー16は、鍋状容器5内の温度を検知する温度検知手段であり、外蓋11に取り付けられている。内部温度センサー16の一部は内蓋12の孔部12aに挿入されており、内部温度センサー16は孔部12aを介して鍋状容器5内の温度を検知するようになっている。内部温度センサー16は、例えばサーミスタで構成することができる。内部温度センサー16が検知した鍋状容器5内の温度に関する情報は、制御手段8に出力される。
(Internal temperature sensor 16)
The internal temperature sensor 16 is temperature detection means for detecting the temperature in the pan-like container 5 and is attached to the outer lid 11. A part of the internal temperature sensor 16 is inserted into the hole 12a of the inner lid 12, and the internal temperature sensor 16 detects the temperature in the pan-like container 5 through the hole 12a. The internal temperature sensor 16 can be composed of, for example, a thermistor. Information regarding the temperature in the pan-like container 5 detected by the internal temperature sensor 16 is output to the control means 8.

次に、炊飯器100の炊飯工程の動作について説明する。
図2は、炊飯器100の炊飯工程と、被加熱物温度、鍋状容器温度、加熱コイルへの通電電力の推移の一例を示す図である。図3は、炊飯器100の炊飯工程を説明するフローチャートである。以下、炊飯器100の炊飯工程を、図2及び図3を参照して説明する。なお、本実施の形態では、被加熱物温度、すなわち鍋状容器5の内部温度を、内部温度センサー16の検出値に基づいて検出する。また、鍋状容器温度(鍋状容器5の温度)を、鍋底温度センサー4の検出値に基づいて検出する。
Next, operation | movement of the rice cooking process of the rice cooker 100 is demonstrated.
FIG. 2 is a diagram illustrating an example of the rice cooking process of the rice cooker 100 and the transition of the heated object temperature, the pan-like container temperature, and the electric power supplied to the heating coil. FIG. 3 is a flowchart for explaining the rice cooking process of the rice cooker 100. Hereinafter, the rice cooking process of the rice cooker 100 is demonstrated with reference to FIG.2 and FIG.3. In the present embodiment, the temperature of the object to be heated, that is, the internal temperature of the pan-like container 5 is detected based on the detection value of the internal temperature sensor 16. Further, the pot-like container temperature (the temperature of the pot-like container 5) is detected based on the detection value of the pot bottom temperature sensor 4.

まず、炊飯器100の炊飯工程を構成する各工程について大まかに説明する。
図2、図3に示すように、炊飯器100の炊飯工程は、吸水工程(ステップS1)と、昇温工程(ステップS7)と、沸騰維持工程(ステップS8)と、蒸らし工程(ステップS9)とを含んでいる。
First, each process which comprises the rice cooking process of the rice cooker 100 is demonstrated roughly.
As shown in FIGS. 2 and 3, the rice cooking process of the rice cooker 100 includes a water absorption process (step S1), a temperature raising process (step S7), a boiling maintenance process (step S8), and a steaming process (step S9). Including.

吸水工程とは、米の内部にまで吸水を促す工程である。その次の昇温工程とは、吸水工程終了後から鍋状容器5内の水が沸騰するまでの工程である。鍋状容器5内の水が沸騰すると、制御手段8は、次の沸騰維持工程に移行する。この沸騰維持工程では、鍋状容器5内の温度が沸騰温度を保持するように加熱し、米のデンプンの糊化を促進する。最後の蒸らし工程とは、鍋状容器5内の米を蒸らすことにより米粒中心部まで糊化を進行させ、且つ、米粒内の水分の分布を均一にする工程である。   The water absorption process is a process of promoting water absorption even inside the rice. The next temperature raising step is a step from the end of the water absorption step until the water in the pot-like container 5 boils. If the water in the pan-like container 5 boils, the control means 8 will transfer to the next boiling maintenance process. In this boiling maintenance process, it heats so that the temperature in the pan-like container 5 may maintain a boiling temperature, and gelatinizes starch of rice. The last steaming process is a process in which gelatinization proceeds to the center of the rice grain by steaming the rice in the pan-like container 5 and the moisture distribution in the rice grain is made uniform.

次に、炊飯器100の炊飯工程の動作について説明する。
まず、使用者が、米200と水201を入れた鍋状容器5を、本体1内の容器カバー2に収納し、蓋体10を閉じ、操作表示部15で炊飯メニューを玄米炊飯と設定し、炊飯スイッチ(図示せず)を押下して、炊飯器100に動作指示を与える。炊飯器100は、炊飯スイッチが使用者によって押下され、動作指示が与えられることで制御手段8は炊飯工程を開始する。
Next, operation | movement of the rice cooking process of the rice cooker 100 is demonstrated.
First, the user stores the pot-like container 5 containing rice 200 and water 201 in the container cover 2 in the main body 1, closes the lid 10, and sets the rice cooking menu as brown rice rice cooking with the operation display unit 15. Then, a rice cooker switch (not shown) is pressed to give an operation instruction to the rice cooker 100. As for the rice cooker 100, the control means 8 starts a rice cooking process because the rice cooking switch is pushed down by the user and an operation instruction is given.

加熱が開始されると、ステップS1の吸水工程が実行される。制御手段8は、時間計測手段7で経過時間tの計測を開始させ(ステップS2)、予め設定された電力Pで加熱コイル3に通電し、鍋状容器5の加熱を行う(ステップS3)。   When heating is started, the water absorption step of Step S1 is performed. The control means 8 causes the time measuring means 7 to start measuring the elapsed time t (step S2), energizes the heating coil 3 with a preset power P, and heats the pan-like container 5 (step S3).

次に、制御手段8は、内部温度センサー16が検知する被加熱物の温度Tが、玄米の皮の軟化温度であるT2(たとえば80℃)以上であるか否かを判定する(ステップS4)。内部温度センサー16が検知する温度TがT2以上であると判定すると(ステップS4;Yes)、制御手段8は、加熱コイル3への通電を遮断する(ステップS5)。そして、制御手段8は、時間計測手段7がカウントする経過時間tが予め設定された経過時間t2以上であるか否かを判定する(ステップS6)。経過時間tが予め設定された経過時間t2以上であると判定すると(ステップS6;Yes)、制御手段8は、次の昇温工程に進み、順次、沸騰維持工程、蒸らし工程を実行し炊飯が終了する。   Next, the control means 8 determines whether or not the temperature T of the object to be heated detected by the internal temperature sensor 16 is equal to or higher than T2 (for example, 80 ° C.) which is the softening temperature of the brown rice skin (step S4). . When it is determined that the temperature T detected by the internal temperature sensor 16 is equal to or higher than T2 (step S4; Yes), the control unit 8 cuts off the power supply to the heating coil 3 (step S5). Then, the control means 8 determines whether or not the elapsed time t counted by the time measuring means 7 is equal to or longer than a preset elapsed time t2 (step S6). When it is determined that the elapsed time t is equal to or longer than the preset elapsed time t2 (step S6; Yes), the control means 8 proceeds to the next temperature raising process, and sequentially performs the boiling maintenance process and the steaming process, and the rice cooking is performed. finish.

以上のように、炊飯器100によれば、被加熱物を皮が軟化する温度まで到達すると、加熱コイル3への通電を遮断し、被加熱物の温度を低下させることで、短時間に美味しく炊飯することができるという効果を奏する。   As described above, according to the rice cooker 100, when the object to be heated reaches a temperature at which the skin softens, the energization to the heating coil 3 is interrupted and the temperature of the object to be heated is lowered, so that it is delicious in a short time. There is an effect that rice can be cooked.

図4は、本実施の形態とは異なる温度履歴で加熱した吸水工程終了直後の玄米の状態を示すイメージ図である。図5は、炊飯器100の吸水工程終了直後の玄米の状態を示すイメージ図である。図4及び図5を参照しながら、玄米の炊き上がり状態について説明する。   FIG. 4 is an image diagram showing the state of brown rice immediately after completion of the water absorption process heated with a temperature history different from that of the present embodiment. FIG. 5 is an image diagram showing the state of brown rice immediately after the water absorption process of the rice cooker 100 is completed. The cooked state of brown rice will be described with reference to FIGS. 4 and 5.

吸水工程において、被加熱物の温度を低温(たとえば30℃)に保持しても玄米の皮が軟らかくならず、内部のデンプンへの吸水が進まない。低温で吸水させるためには1晩以上の時間を要する。吸水が不十分なまま昇温工程、沸騰維持工程、蒸らし工程と炊飯工程を進めても、皮と胚乳部がなかなか軟らかくならない。水の量を増やして長時間沸騰維持させると胚乳部だけが過剰に吸水してぐちゃぐちゃになり、皮と胚乳部が分離して皮の口当たりが悪く美味しくない。   In the water absorption step, even if the temperature of the article to be heated is kept at a low temperature (for example, 30 ° C.), the brown rice skin does not become soft and water absorption into the starch inside does not proceed. To absorb water at a low temperature, it takes more than one night. Even if the temperature rising process, boiling maintaining process, steaming process and rice cooking process are carried out with insufficient water absorption, the skin and the endosperm part do not become soft. If the amount of water is increased and kept boiling for a long time, only the endosperm part absorbs water excessively and becomes messed up.

そこで、炊飯器100では、吸水工程で玄米を高温にさらすことで玄米の皮が軟化し、且つデンプンの吸水も進むため、短時間で美味しく炊飯できるようにしている。実験により70℃付近から玄米の皮の軟化が起こり始め、温度が高いほど、特に80℃以上で軟化が進みやすいことが分かった。さらに、単純に軟化温度を維持するように加熱を続けるのではなく、本実施の形態のように皮の軟化温度以上に到達したら加熱手段への入力を停止し被加熱物の温度を低下させることで、粒の形状をきれいに保持した状態で炊きあがり、好ましい食感の美味しい玄米ご飯になることが分かった。   Therefore, in the rice cooker 100, the brown rice skin is softened by exposing the brown rice to a high temperature in the water absorption step and the water absorption of the starch also proceeds, so that the rice can be cooked deliciously in a short time. Experiments have shown that the brown rice skin begins to soften from around 70 ° C., and that the higher the temperature, the easier the softening proceeds, especially at 80 ° C. or higher. Furthermore, the heating is not simply continued so as to maintain the softening temperature, but if the temperature reaches or exceeds the softening temperature of the skin as in this embodiment, the input to the heating means is stopped and the temperature of the object to be heated is lowered. It was found that the rice was cooked in a state where the shape of the grains was kept clean, resulting in a delicious brown rice with a favorable texture.

皮の軟化温度のまま加熱を続けると、皮に生じた裂け目から胚乳部のデンプンが急激に、且つ、過剰に吸水して膨らみ、結果、その裂け目から一部のデンプンがはみ出す状態となって、吸水工程終了時には米粒がいびつな形状となる(図4参照)。この状態で炊き上げると、皮からはみ出したデンプン部分がぐちゃぐちゃして食感が悪くなり美味しくない。   If heating is continued with the softening temperature of the skin, the starch in the endosperm part rapidly and excessively swells from the tears generated in the skin, and as a result, a part of the starch protrudes from the tears, At the end of the water absorption process, the rice grains have an irregular shape (see FIG. 4). When cooked in this state, the starch portion that protrudes from the skin is messed up and the texture is poor, so it is not delicious.

しかし、本実施の形態のように軟化温度に到達すると加熱手段への入力を停止し、被加熱物の温度を低下させることで胚乳部のデンプンの過剰吸水を抑制できる。そして、一旦は軟化温度以上の高温にさらすことで皮が軟化して組織構造が緩みつつ、余熱で徐々に胚乳部のデンプンの吸水も進むため、皮と胚乳部がほぼ同時進行で膨らむ。そのため、図5のように米粒の形状を保持したままの状態で吸水工程を終了することができ、この状態で炊き上げると、飯粒の食感が良く美味しい玄米ごはんとなる。   However, when the softening temperature is reached as in this embodiment, the input to the heating means is stopped, and the excessive water absorption of starch in the endosperm portion can be suppressed by lowering the temperature of the heated object. Then, once exposed to a high temperature equal to or higher than the softening temperature, the skin softens and the tissue structure loosens, and the water absorption of the starch in the endosperm portion gradually proceeds due to residual heat, so that the skin and the endosperm portion swell almost simultaneously. Therefore, the water absorption process can be completed while maintaining the shape of the rice grains as shown in FIG. 5, and when cooked in this state, the rice grain has a good texture and becomes a delicious brown rice rice.

なお、ステップS4において内部温度センサー16で被加熱物の温度を検知して加熱コイル3への通電、遮断を判断したが、鍋底温度センサー4で鍋底温度T1を検知することにより、被加熱物の温度を予測して判断するようにしてもよい。鍋底温度センサー4で鍋底温度T1を検知することにより、鍋底部の玄米が過加熱状態になって焦げてしまうことを抑止することができる。
ただし、内部温度センサー16で被加熱物の温度を推測して判断することにより、被加熱物全体が十分に皮の軟化温度に到達したことを判断することができる。
また、温度検知手段の情報に基づくのではなく、予め設定された電力Pで予め設定された時間t1だけ加熱するようにしてもよい。
In step S4, the temperature of the object to be heated is detected by the internal temperature sensor 16 to determine whether the heating coil 3 is energized or cut off, but by detecting the pot bottom temperature T1 by the pot bottom temperature sensor 4, the temperature of the object to be heated is determined. You may make it judge by predicting temperature. By detecting the pan bottom temperature T <b> 1 with the pan bottom temperature sensor 4, it is possible to prevent brown rice at the bottom of the pan from being overheated and being burnt.
However, it is possible to determine that the entire object to be heated has sufficiently reached the softening temperature of the skin by estimating and determining the temperature of the object to be heated by the internal temperature sensor 16.
Further, instead of based on the information of the temperature detection means, heating may be performed for a preset time t1 with a preset power P.

外気温が高い場合や炊飯量が多い場合は、加熱コイル3への通電を遮断してもなかなか温度が下がらないことがある。その場合は、前述したように胚乳部のデンプンが急激に、且つ、過剰に吸水して膨らみ、美味しくない玄米ご飯につながってしまう。そのため、冷却手段として炊飯器100に給水手段を設けるようにしてもよい(図示せず)。たとえば、ステップS4で内部温度センサー16が検知する温度TがT2以上であると判定すると(ステップS4;Yes)、制御手段8は、給水手段を動作させ鍋状容器5内に水を供給し被加熱物の温度を低下させる。また、冷却手段としてファンを設け、ファンによって風をあてることで冷却するようにしてもよい。   When the outside air temperature is high or the amount of cooked rice is large, the temperature may not easily decrease even if the power supply to the heating coil 3 is cut off. In that case, as described above, the starch in the endosperm part rapidly and excessively absorbs water and swells, leading to unsavory brown rice. Therefore, you may make it provide a water supply means in the rice cooker 100 as a cooling means (not shown). For example, if it is determined in step S4 that the temperature T detected by the internal temperature sensor 16 is equal to or higher than T2 (step S4; Yes), the control means 8 operates the water supply means to supply water into the pan-like container 5 and cover it. Reduce the temperature of the heated object. Further, a fan may be provided as a cooling means, and cooling may be performed by applying air with the fan.

逆に、外気温が低い場合や炊飯量が少ない場合は、加熱コイル3への通電を遮断するとすぐに温度が下がり所望の温度(予め定めた設定温度)よりも低下することがある。デンプンは温度が高ければ高いほど吸水が進むため、ここで温度が下がりすぎると玄米の中心部まで水が行き渡らず、芯のある炊き上がりにつながってしまう。その場合は、図6に示すように鍋底温度センサー4及び内部温度センサー16の少なくとも1つからの情報に基づいて所望の温度帯(予め定めた温度帯、この場合は、温度T4〜T3の間)を保持するように加熱コイル3へ通電するようにしてもよい。または,所望の温度帯を保持するような所定の電力で加熱コイル3へ通電するようにしてもよい。図6は、炊飯器100の炊飯工程と、被加熱物温度、鍋状容器温度、加熱コイルへの通電電力の推移の他の一例を示す図である。   Conversely, when the outside air temperature is low or the amount of cooked rice is small, the temperature may drop immediately after the power supply to the heating coil 3 is cut off, and may be lower than the desired temperature (predetermined set temperature). As the temperature of starch increases, water absorption proceeds. If the temperature is too low, water does not reach the center of brown rice, leading to a boiled rice. In that case, as shown in FIG. 6, based on information from at least one of the pan bottom temperature sensor 4 and the internal temperature sensor 16, a desired temperature range (a predetermined temperature range, in this case, between the temperatures T4 to T3). ) May be energized to the heating coil 3. Alternatively, the heating coil 3 may be energized with a predetermined power that maintains a desired temperature range. FIG. 6 is a diagram illustrating another example of the rice cooking process of the rice cooker 100 and the transition of the heated object temperature, the pan-like container temperature, and the energization power to the heating coil.

なお、温度T3が糊化温度以上の場合、より短時間に吸水が進むため炊飯時間の短縮につながるという効果がある。   In addition, when temperature T3 is more than gelatinization temperature, since water absorption advances in a shorter time, there exists an effect of leading to shortening of rice cooking time.

一方、温度T3が糊化温度未満の場合、胚乳部のデンプンが過剰に吸水することがないため、炊き上がりの食感が悪くなるのを防ぐことができる。また、吸水時間を長時間実施することが可能となり、その結果、糊化温度以下の温度帯で酵素活性が高いGABA生成酵素の働きにより、健康に良いといわれるGABA(γ−アミノ酪酸)を多く含んだ玄米ご飯を炊き上げることができるという効果がある。   On the other hand, when the temperature T3 is lower than the gelatinization temperature, the starch in the endosperm portion does not absorb water excessively, so that the texture after cooking can be prevented from being deteriorated. In addition, the water absorption time can be extended for a long time. As a result, GABA (γ-aminobutyric acid), which is said to be good for health, is increased by the action of GABA-producing enzyme having high enzyme activity in the temperature range below the gelatinization temperature. There is an effect that you can cook brown rice that contains.

そのため、吸水工程の時間を予め設定された時間t2だけ実行するのではなく、内部温度センサー16または鍋底温度センサー4の情報に基づいて判断してもよい。また、温度の低下は前述のとおり外気温や炊飯量に依存するため、外気温検知手段や炊飯量判定手段の情報に基づき、吸水工程の時間を判断してもよい。もしくは、予め設定された時間t2で判断するのではなく、皮の軟化温度以上に到達したと判断した後の時間(すなわち、時間t2−t1)を所定の時間とするようにしてもよい。皮の軟化温度以上まで到達させた後の工程は吸水が進みやすいため、到達後の時間を所定の時間とすることで炊飯するたびに吸水工程での吸水ばらつきが発生することなく、毎回同一の仕上がりの玄米ご飯を供することができる。   Therefore, the time of the water absorption process may be determined based on the information of the internal temperature sensor 16 or the pan bottom temperature sensor 4 instead of executing only the preset time t2. Moreover, since the fall of temperature depends on external temperature and the amount of rice cooking as mentioned above, you may judge the time of a water absorption process based on the information of an external temperature detection means or a rice cooking amount determination means. Alternatively, instead of making a determination at a preset time t2, the time after determining that the skin softening temperature has been reached (that is, time t2-t1) may be set as the predetermined time. Since the process after reaching the softening temperature of the skin is easy to proceed with water absorption, the water absorption variation in the water absorption process does not occur every time rice is cooked by setting the time after arrival to the predetermined time, and the same time each time. Finished brown rice can be served.

なお、本実施の形態では本発明に係る加熱調理器及び加熱制御方法を家庭用IH式炊飯器を例にして、炊飯器における玄米の炊飯について述べたが、炊飯器に限るものではなく、たとえばIHクッキングヒーターやガスコンロなどの加熱調理器を用いた加熱制御方法に適用してもよい。IHクッキングヒーターやガスコンロなどの加熱調理器であれば、炊飯器100が備える本体1や容器カバー2がない状態で炊飯することになるため、加熱手段への入力を停止すると鍋状容器内の被加熱物の温度が早く冷えるため、外気温が高い場合や炊飯量が多い場合であっても冷却手段が不要で図2に示すような理想的な温度履歴で炊飯が可能となる。   In the present embodiment, the cooking device and the heating control method according to the present invention have been described with respect to a rice cooker of brown rice in a rice cooker, taking a household IH rice cooker as an example, but is not limited to a rice cooker, for example, You may apply to the heating control method using heating cookers, such as an IH cooking heater and a gas stove. If it is a heating cooker such as an IH cooking heater or gas stove, rice is cooked without the main body 1 and the container cover 2 provided in the rice cooker 100. Therefore, if the input to the heating means is stopped, the heated object in the pan-shaped container Since the temperature of the object cools quickly, even if the outside air temperature is high or the amount of cooking rice is large, the cooling means is unnecessary, and rice cooking can be performed with an ideal temperature history as shown in FIG.

なお、これまで玄米での炊飯について述べてきたが、皮がついた状態のまま食する穀類、たとえばアワなどにも適用することで美味しく炊飯することができる。   In addition, although rice cooking in brown rice has been described so far, it can be cooked deliciously by applying it to cereals such as millet that are eaten while being peeled.

1 本体、2 容器カバー、2a 孔部、3 加熱コイル、4 鍋底温度センサー、5 鍋状容器、5a フランジ部、6 ヒンジ部、7 時間計測手段、8 制御手段、9 蓋パッキン、10 蓋体、11 外蓋、11a パッキン、12 内蓋、12a 孔部、12b 蒸気口、13 係止材、14 カートリッジ、14a 蒸気取入口、14b 蒸気排出口、15 操作表示部、16 内部温度センサー、100 炊飯器、200 米、201 水。   DESCRIPTION OF SYMBOLS 1 Main body, 2 Container cover, 2a Hole part, 3 Heating coil, 4 Pan bottom temperature sensor, 5 Pan-shaped container, 5a Flange part, 6 Hinge part, 7 Time measurement means, 8 Control means, 9 Cover packing, 10 Cover body, DESCRIPTION OF SYMBOLS 11 Outer lid, 11a Packing, 12 Inner lid, 12a Hole part, 12b Steam port, 13 Locking material, 14 Cartridge, 14a Steam inlet, 14b Steam outlet, 15 Operation display part, 16 Internal temperature sensor, 100 Rice cooker 200 rice, 201 water.

Claims (4)

被加熱物を収容する鍋状容器を加熱する加熱手段と、
前記加熱手段を制御する制御手段と、を備え、
前記制御手段は、
前記鍋状容器に前記被加熱物として玄米が収容され、前記玄米を炊き上げる玄米用の炊飯工程で実行される吸水工程において、前記被加熱物の温度が前記玄米の皮の軟化温度以上に到達すると、前記加熱手段への入力を停止し、その後、前記被加熱物の温度を糊化温度以上で保持する
ことを特徴とする加熱調理器。
A heating means for heating a pot-shaped container for containing an object to be heated;
Control means for controlling the heating means,
The control means includes
In the water absorption process performed in the rice cooking process for brown rice where brown rice is accommodated as the heated object in the pan-like container, the temperature of the heated object reaches or exceeds the softening temperature of the brown rice skin Then, the input to the said heating means is stopped , and the temperature of the said to-be-heated material is hold | maintained more than gelatinization temperature after that, The cooking device characterized by the above-mentioned .
冷却手段を有し、
前記制御手段は、
前記吸水工程において、前記被加熱物の温度が前記玄米の皮の軟化温度に到達すると、前記冷却手段を制御して前記被加熱物を冷却する
ことを特徴とする請求項1に記載の加熱調理器。
Having cooling means,
The control means includes
2. The cooking according to claim 1, wherein, in the water absorption step, when the temperature of the heated object reaches a softening temperature of the brown rice skin, the cooling unit is controlled to cool the heated object. vessel.
前記冷却手段として前記鍋状容器内に水を供給する給水手段を備え、
前記制御手段は、
前記吸水工程において、前記被加熱物の温度が前記玄米の皮の軟化温度に到達すると、前記給水手段を動作させて前記鍋状容器内に水を供給させる
ことを特徴とする請求項2に記載の加熱調理器。
Water supply means for supplying water into the pan-like container as the cooling means,
The control means includes
The water-absorbing step, when the temperature of the heated object reaches the softening temperature of the brown rice skin, operates the water supply means to supply water into the pot-shaped container. Cooking device.
玄米を炊き上げる玄米用の炊飯工程を備えた加熱制御方法であって、
前記炊飯工程で実行される吸水工程において、
鍋状容器に収容された被加熱物の温度が玄米の皮の軟化温度以上に到達すると、前記鍋状容器を加熱する加熱手段への入力を停止し、前記加熱手段への入力停止後、前記被加熱物の温度が予め定めた設定温度より低下した場合、前記鍋状容器の温度及び前記被加熱物の温度のいずれか1つの温度情報に基づいて前記被加熱物の温度を予め定めた糊化温度以上で保持する
ことを特徴とする加熱制御方法。
A heating control method comprising a rice cooking process for brown rice that cooks brown rice,
In the water absorption process performed in the rice cooking process,
When the temperature of the object to be heated contained in the pan-like container reaches or exceeds the softening temperature of the brown rice skin, the input to the heating means for heating the pan-like container is stopped, and after the input to the heating means is stopped, When the temperature of the object to be heated is lower than a predetermined set temperature, the temperature of the object to be heated is determined based on temperature information of one of the temperature of the pan-shaped container and the temperature of the object to be heated. A heating control method characterized by holding at a temperature equal to or higher than the crystallization temperature .
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