JP2005168548A - Electric rice cooker - Google Patents

Electric rice cooker Download PDF

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JP2005168548A
JP2005168548A JP2003408612A JP2003408612A JP2005168548A JP 2005168548 A JP2005168548 A JP 2005168548A JP 2003408612 A JP2003408612 A JP 2003408612A JP 2003408612 A JP2003408612 A JP 2003408612A JP 2005168548 A JP2005168548 A JP 2005168548A
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rice
cooking
cooked
pan
amount
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Hiroshi Oya
弘 大矢
Koichiro Yamashita
幸一郎 山下
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To automatically detect the amount of rice to be cooked, reduce uneven cooking even if changing the amount of the rice to be cooked and improve the taste in a rice cooker controlling the energization to a first heating means heating the bottom part of a pot and a second heating means heating the side part of the pot. <P>SOLUTION: A rice cooker body 10 detachably stores the pot 12 for putting an object to be cooked therein, heats the bottom part of the pot 12 by an inner coil 13, heats the bottom side part of the pot 12 or the side part of the pot by an outer coil 14 positioned outside the inner coil 13, controls the energization to the inner coil 13 and the outer coil 14 by a control means and detects the temperature of the materials 19 to be cooked by the bottom sensor 16. The control means 15 variably changes a rice cooking process by a signal of a weight sensor 17 detecting the amount of the object 19 to be cooked. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、鍋の底面部を加熱する第1の加熱手段と鍋の底側面部または鍋の側面部を加熱する第2の加熱手段の通電を制御して炊飯する電気炊飯器に関するものである。   The present invention relates to an electric rice cooker that cooks rice by controlling energization of a first heating means for heating the bottom surface of the pan and a second heating means for heating the bottom side surface of the pan or the side surface of the pan. .

近年、電磁誘導加熱を利用した電気炊飯器が提案されている。従来、この種の電気炊飯器は図8に示すように構成していた。以下、その構成について説明する。   In recent years, electric rice cookers using electromagnetic induction heating have been proposed. Conventionally, this type of electric rice cooker has been configured as shown in FIG. Hereinafter, the configuration will be described.

図8に示すように、炊飯器本体1は上面が開口する円筒状に構成し、この炊飯器本体1の内部に鍋3の収納部であるコイルベース2を配設し、このコイルベース2は非金属材料により有底円筒状に成形している。コイルベース2の外側には加熱手段である誘導コイル4を鍋3の底面および底側面部に対向して配設している。   As shown in FIG. 8, the rice cooker main body 1 is formed in a cylindrical shape with an open upper surface, and a coil base 2 that is a storage portion for the pan 3 is disposed inside the rice cooker main body 1. It is molded into a bottomed cylindrical shape using a non-metallic material. On the outside of the coil base 2, an induction coil 4 serving as a heating means is disposed to face the bottom surface and the bottom side surface portion of the pan 3.

上記構成において、まず、鍋3に米・水等の調理物を所定量投入した後、誘導コイル4に通電し鍋3を加熱する。所定の通電パターンで通電することにより炊飯が行われる(例えば、特許文献1参照)。   In the above configuration, first, a predetermined amount of cooked material such as rice and water is put into the pan 3, and then the induction coil 4 is energized to heat the pan 3. Rice cooking is performed by energizing with a predetermined energization pattern (see, for example, Patent Document 1).

また、重量検知手段を備え、炊飯器本体または鍋の重量を検知して炊飯量を判定し、沸騰するまでの時間を可変する炊飯器について提案されている(例えば、特許文献2参照)。
特開2002−010910号公報 特公平1−27724号公報
Moreover, the rice cooker which is provided with a weight detection means, detects the weight of a rice cooker main body or a pan, determines the amount of rice cooking, and varies the time until it boils is proposed (for example, refer patent document 2).
JP 2002-010910 A Japanese Examined Patent Publication No. 1-2724

しかしながら、図8に示す従来の構成では、炊飯中のご飯の温度上昇特性は炊飯量により異なるものである。すなわち、多量炊飯の場合は、炊飯が進行し米が水を吸い込み水の水位が下がると、上層部のご飯周辺の水はすぐ水がなくなり硬く炊き上がり、下層部のご飯周辺は最後まで水が残るため柔らかく炊き上がる。この結果、炊きむらが増加し食味を悪化させる原因となっていた。   However, in the conventional configuration shown in FIG. 8, the temperature rise characteristics of the rice during cooking differ depending on the amount of rice cooked. In other words, in the case of large-scale rice cooking, when the rice is cooked and the rice sucks water and the water level drops, the water around the upper layer of rice is immediately drained and cooked hard, and the lower part of the rice is heated to the end. Cooked softly to remain. As a result, cooking unevenness increased, which caused the taste to deteriorate.

この問題を解決する手段としては、加熱手段である誘導コイル4を鍋底側面部に重点配設することで、炊き上げ途上の調理物の対流方向を外対流にすることにより、炊き上げ中の調理物の温度を上層部より先に上昇させ、炊きむらを改善することができる。しかし、この状態で少量を炊飯した場合、ご飯上層部と下層部周辺の水がなくなるタイムラグが小さいため、逆に上層部が炊けすぎる場合がある。また、鍋底側面部を加熱しすぎるためご飯の鍋接触部上部が乾燥してしまい食味を悪化させる原因となっていた。   As means for solving this problem, cooking is being cooked by placing the induction coil 4 as heating means on the side surface of the pan bottom so that the convection direction of the food being cooked is outside convection. The temperature of an object can be raised before an upper layer part and cooking unevenness can be improved. However, when a small amount of rice is cooked in this state, the upper layer portion may be cooked too much because the time lag in which the water around the upper and lower portions of the rice runs out is small. Moreover, since the pan bottom side part was heated too much, the pan contact part upper part of the rice dried and it became the cause of deteriorating the taste.

また、重量検知手段を備え、炊飯器本体または鍋の重量を検知して炊飯量を判定し沸騰するまでの時間を可変する炊飯器でも、沸騰までに鍋の受ける熱分布を可変させることができないため、炊きむらの改善を解決することができないものであった。   In addition, even with a rice cooker equipped with weight detection means, which detects the weight of the rice cooker body or pan, determines the amount of rice cooked, and varies the time until boiling, the heat distribution received by the pan cannot be varied before boiling Therefore, the improvement of cooking unevenness cannot be solved.

本発明は上記従来の課題を解決するもので、炊飯量を自動的に検出し、炊飯量が変化しても炊きむらを低減し、食味を向上することを目的としている。   SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and aims to automatically detect the amount of rice cooked, reduce cooking unevenness and improve the taste even if the amount of cooked rice changes.

本発明は上記目的を達成するために、炊飯器本体に調理物を入れる鍋を着脱自在に収納し、鍋の底面部を第1の加熱手段により加熱するとともに、第1の加熱手段の外側に位置する第2の加熱手段により鍋の底側面部または鍋の側面部を加熱し、制御手段により第1および第2の加熱手段の通電を制御し、調理物の温度を温度検知手段により検知するよう構成し、制御手段は、調理物の量を検知する重量検知手段の信号により炊飯プロセスを可変するようにしたものである。   In order to achieve the above-mentioned object, the present invention detachably stores a pan for putting a cooked food in a rice cooker body, heats the bottom surface of the pan by the first heating means, and outside the first heating means. The bottom side surface portion of the pan or the side surface portion of the pan is heated by the second heating means positioned, the energization of the first and second heating means is controlled by the control means, and the temperature of the food is detected by the temperature detection means. The control means is configured to vary the rice cooking process according to a signal from the weight detection means for detecting the amount of the cooked food.

これにより、炊飯量に応じた加熱を行うことができるため、炊飯量が変化しても炊きむらを低減し、美味しいご飯を炊くことができる。   Thereby, since heating according to the amount of rice cooking can be performed, even if the amount of rice cooking changes, cooking unevenness can be reduced and delicious rice can be cooked.

本発明の電気炊飯器は、炊飯量が変化しても炊きむらを低減し、美味しいご飯を炊くことができる。   The electric rice cooker of the present invention can reduce cooking unevenness and cook delicious rice even if the amount of cooked rice changes.

第1の発明は、炊飯器本体と、この炊飯器本体に着脱自在に収納され調理物を入れる鍋と、前記鍋の底面部を加熱する第1の加熱手段と、前記第1の加熱手段の外側に位置し前記鍋の底側面部または鍋の側面部を加熱する第2の加熱手段と、前記第1および第2の加熱手段の通電を制御する制御手段と、調理物の温度を検知する温度検知手段と、調理物の量を検知する重量検知手段とを備え、前記制御手段は、前記重量検知手段の信号により炊飯プロセスを可変するようにしたものであり、炊飯初期プロセスに第2の加熱手段で加熱すると、調理物中の水が鍋の側面部を通過する外対流が促進され、調理物上層部の温度を上昇させることができる。この後、第1の加熱手段および第2の加熱手段の両方を通電することにより、調理物上層部の温度が下層部よりもはやく上昇するため調理物の下方部の炊けすぎを防止することができ、炊飯量が変化しても炊きむらを低減し、食味を向上することができる。   1st invention is the rice cooker main body, the pan which is accommodated in this rice cooker main body so that attachment is possible, the 1st heating means which heats the bottom face part of the pan, and the 1st heating means 2nd heating means which is located outside and heats the bottom side surface portion of the pan or the side surface portion of the pan; control means for controlling energization of the first and second heating means; and detects the temperature of the food. A temperature detection means and a weight detection means for detecting the amount of the cooked food, wherein the control means is configured to vary the rice cooking process according to a signal from the weight detection means; When heated by the heating means, the external convection in which the water in the food passes through the side surface of the pan is promoted, and the temperature of the upper layer of the food can be increased. After that, by energizing both the first heating means and the second heating means, the temperature of the upper part of the cooked food will rise more than the lower layer so that overcooking of the lower part of the cooked food can be prevented. Even if the amount of cooked rice changes, the cooking unevenness can be reduced and the taste can be improved.

第2の発明は、上記第1の発明において、制御手段は、炊飯開始後、重量検知手段の信号により、主に第2の加熱手段より通電する時間を可変するようにしたものであり、炊飯開始後、炊飯初期プロセスに第2の加熱手段で加熱すると、調理物中の水が鍋の側面部を通過する外対流が促進され、調理物上層部の温度を上昇させることができる。この後、第1の加熱手段および第2の加熱手段の両方を通電することにより、調理物上層部の温度が下層部よりもはやく上昇するため調理物の下方部の炊けすぎを防止できる。ここで、重量検知手段の信号より、第2の加熱手段より通電する時間を可変することで、炊飯量が変わっても、より炊きむらを抑え、食味を向上することができる。   In a second aspect of the invention according to the first aspect of the invention, the control means is configured to vary the time of energization mainly from the second heating means by the signal of the weight detection means after the start of rice cooking. After the start, when the rice cooking initial process is heated by the second heating means, the external convection in which the water in the cooked food passes through the side surface of the pan is promoted, and the temperature of the cooked food upper layer can be raised. After this, by energizing both the first heating means and the second heating means, the temperature of the upper part of the cooked food is no longer higher than that of the lower cooked part, so that overcooking of the lower part of the cooked food can be prevented. Here, by varying the time of energization from the second heating means from the signal of the weight detection means, even if the amount of cooked rice is changed, uneven cooking can be further suppressed and the taste can be improved.

第3の発明は、上記第1の発明において、制御手段は、炊飯開始後、調理物を沸騰させる炊き上げ工程において、重量検知手段の信号により、炊飯加熱量を可変するようにしたものであり、調理物の温度上昇の勾配を略一定にすることができ、炊飯量による食味の差をより向上することができる。   According to a third aspect of the present invention, in the first aspect of the present invention, the control means is configured to vary the amount of rice cooking heating in accordance with a signal from the weight detection means in the cooking step of boiling the cooked food after the start of rice cooking. The gradient of the temperature rise of the cooked food can be made substantially constant, and the difference in taste depending on the amount of cooked rice can be further improved.

第4の発明は、上記第1の発明において、制御手段は、炊飯開始後、調理物を沸騰させる炊き上げ工程において、重量検知手段の信号により、第1の加熱手段と第2の加熱手段の通電比率を可変するようにしたものであり、第2の加熱手段の通電時間を制御することにより、調理物の上層部と下層部の温度差を制御することができる。したがって、重量検知手段の信号より、第2の加熱手段に通電する通電比率を可変することで、炊飯量が変化してもより炊きむらを抑え食味を向上することができる。   According to a fourth aspect of the present invention, in the first aspect of the present invention, in the cooking step of boiling the cooked food after the start of rice cooking, the control unit is configured to control the first heating unit and the second heating unit according to a signal from the weight detection unit. The energization ratio is made variable, and the temperature difference between the upper layer portion and the lower layer portion of the cooked product can be controlled by controlling the energization time of the second heating means. Therefore, by changing the energization ratio for energizing the second heating means from the signal of the weight detection means, even if the amount of cooking is changed, the cooking unevenness can be further suppressed and the taste can be improved.

第5の発明は、上記第1の発明において、制御手段は、炊飯開始後、調理物に吸水させる前炊き工程において、重量検知手段の信号により、前炊き温度を可変するようにしたものであり、米水等の調理物の温度を一定にすることができ、炊飯量が変わっても炊き上がりを安定化させることができる。   According to a fifth aspect of the present invention, in the first aspect, the control means is configured to vary the pre-cooking temperature in accordance with a signal from the weight detection means in a pre-cooking process in which the cooked product absorbs water after starting rice cooking. The temperature of the cooked food such as rice water can be made constant, and the cooked rice can be stabilized even if the amount of cooked rice changes.

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

(実施の形態1)
図1に示すように、炊飯器本体10は上面が開口し、非金属材料により有底円筒状に成形したコイルベース11を有している。鍋12は、調理物を入れるもので、炊飯器本体10に着脱自在に収納している。コイルベース11の鍋12の底部に対向する部分に、鍋12の底面部を加熱する第1の加熱手段である内コイル13を配設し、コイルベース11の鍋12の底側部に対向する部分に、鍋12の底側面部または鍋の側面部を加熱する第2の加熱手段である外コイル14を配設している。制御手段15は内コイル13および外コイル14それぞれに交番磁界を発生させるための通電を制御するようにしている。底センサ(温度検知手段)16は、鍋12の温度を検知することで調理物の温度を検知するもので、コイルベース11に設け、鍋12の鍋底中央部に当接し、鍋12の温度を検知するようにしている。重量センサ(重量検知手段)17は、鍋12の重量を検知することで、調理物の量を検知するもので、底センサ16の下部に位置し、ロードセル(図示せず)の変位により、調理物19である米・水の重量を測定するようにしている。18は外蓋である。
(Embodiment 1)
As shown in FIG. 1, the rice cooker body 10 has a coil base 11 having an open top surface and formed into a bottomed cylindrical shape from a non-metallic material. The pan 12 is used to put a food, and is detachably stored in the rice cooker body 10. An inner coil 13, which is a first heating means for heating the bottom surface of the pan 12, is disposed in a portion of the coil base 11 that faces the bottom of the pan 12, and faces the bottom side of the pan 12 of the coil base 11. The outer coil 14 which is the 2nd heating means which heats the bottom side part of the pan 12 or the side part of the pan is arrange | positioned in the part. The control means 15 controls energization for generating an alternating magnetic field in each of the inner coil 13 and the outer coil 14. The bottom sensor (temperature detection means) 16 detects the temperature of the cooked food by detecting the temperature of the pan 12, is provided on the coil base 11, abuts on the center of the pan bottom of the pan 12, and controls the temperature of the pan 12. I try to detect it. The weight sensor (weight detection means) 17 detects the amount of the cooked food by detecting the weight of the pan 12, and is located below the bottom sensor 16, and cooks by the displacement of the load cell (not shown). The weight of rice / water as the object 19 is measured. Reference numeral 18 denotes an outer lid.

ここで、制御手段15は、図2に示すように、「炊き上げ1」、「炊き上げ2」、「沸騰」、「追い炊き」、「蒸らし」の各工程を実施し、炊飯開始後「炊き上げ1」にて、重量センサ17の信号により外コイル14より通電する時間を可変するようにし、炊飯プロセスを可変するようにしている。   Here, as shown in FIG. 2, the control means 15 performs the steps “cooking 1”, “cooking 2”, “boiling”, “cooking”, and “steaming”. In the “cooking 1”, the time for energization from the outer coil 14 is varied by the signal from the weight sensor 17 so that the rice cooking process is varied.

上記構成おいて動作、作用を説明する。鍋12に米水等の調理物19を投入し、制御手段15により外コイル14に電流を流すように制御すると、外コイル14は交番磁界を発生し鍋12を加熱して炊飯を開始し、図2に示す炊飯プロセスにより炊飯される。ここで、「炊き上げ1」を主に外コイル14にて炊飯する。   The operation and action of the above configuration will be described. When the cooked food 19 such as rice water is put into the pan 12 and the control means 15 controls the current to flow through the outer coil 14, the outer coil 14 generates an alternating magnetic field and heats the pan 12 to start cooking, Rice is cooked by the rice cooking process shown in FIG. Here, “cooking 1” is cooked mainly by the outer coil 14.

「炊き上げ1」、「炊き上げ2」にて、調理物19の温度を均一に上昇させて「沸騰」に達すると、調理物19である米は水を吸収し、調理物19の上層部は比較的はやく米の周りの水がなくなり、調理物19の下方は最後まで米の周りに水が存在するため炊けすぎた状態となり、べちゃになりやすいものであった。   When “boiling 1” and “cooking 2” raise the temperature of the cook 19 uniformly to reach “boiling”, the rice that is the cook 19 absorbs water, and the upper layer of the cook 19 The water around the rice disappeared relatively quickly, and the bottom of the cooked food 19 was overcooked due to the presence of water around the rice until the end.

このため、本実施の形態において、炊飯初期プロセスである「炊き上げ1」で外コイル14に通電し加熱すると、調理物19中の水は鍋12の側面部を通過する外対流となり、調理物19の上層部の温度が上昇する。この後、「炊き上げ2」で内コイル13および外コイル14に通電することにより、調理物19の上層部の温度がすでに下層部よりもはやく上昇しているため調理物20の下方部の炊けすぎを防止できる。   For this reason, in this embodiment, when the outer coil 14 is energized and heated in “cooking 1”, which is the initial process of cooking rice, the water in the cooking 19 becomes an external convection passing through the side surface of the pan 12, and the cooking The temperature of the upper layer part of 19 increases. After that, by energizing the inner coil 13 and the outer coil 14 with “cooking 2”, the temperature of the upper layer of the cook 19 has already risen from the lower layer, so that the lower portion of the cook 20 is cooked. You can prevent too much.

また、「炊き上げ1」の時間を制御することにより調理物19の上層部と下層部の温度差を制御できる。すなわち、「炊き上げ1」の通電時間を長くすればするほど、調理物19の上層部と下層部の温度差が広がる。   Moreover, the temperature difference of the upper layer part of the cooking thing 19 and a lower layer part can be controlled by controlling the time of "cooking 1". That is, the longer the energization time of “cooking 1”, the wider the temperature difference between the upper layer portion and the lower layer portion of the cooked item 19.

図3は、「炊き上げ1」の時間を可変させたときの調理物19の温度を示したグラフである。図中aは調理物19の下層部の温度、bは同中層部の温度、cは同中層部の温度を示す。図3(a)は「炊き上げ1」の時間が0分、図3(b)は「炊き上げ1」の時間が3分、図3(c)は「炊き上げ1」の時間が6分の場合を示す。   FIG. 3 is a graph showing the temperature of the cooked food 19 when the “cooking 1” time is varied. In the figure, a indicates the temperature of the lower layer portion of the food 19, b indicates the temperature of the middle layer portion, and c indicates the temperature of the middle layer portion. FIG. 3 (a) shows “cooking 1” time of 0 minutes, FIG. 3 (b) shows “cooking 1” time of 3 minutes, and FIG. 3 (c) shows “cooking 1” time of 6 minutes. This case is shown.

図3より明らかなように、「炊き上げ1」の時間が長くなればなるほど、下層部の温度aと上層部の温度cの差が広がっている。発明者らの実験によれば、図3(a)の炊飯プロセスでは調理物19であるご飯は、2カップの炊飯量では良好に炊飯できたが、5カップ以上の炊飯量では下層部にべちゃつきが生じ食味を悪化させていた。また、図3(c)の炊飯プロセスでは8カップ以上の炊飯量では良好に炊飯できたが、5カップ以下の炊飯量では下層部が煮足りなくなり、ポロポロとした食感となった。図3(b)の炊飯プロセスでは5カップ前後の炊飯量のときの調理物19であるご飯は、ご飯の上下むらがほとんどなく食味も良好であった。しかし、3カップ以下の炊飯量では下層部が煮足りなくなり、ポロポロとした食感となり、8カップ以上の炊飯量では下層部にべちゃつきが生じ食味を悪化させた。上記実験からも、「炊き上げ1」の時間を最適にすることにより、調理物20であるご飯の食味を向上することができる。   As is clear from FIG. 3, the difference between the lower layer temperature a and the upper layer temperature c increases as the “cooking 1” time increases. According to the experiments by the inventors, in the rice cooking process of FIG. 3 (a), the cooked rice 19 could be cooked well with 2 cups of cooked rice, but with 5 cups or more of rice cooked, The fluffy taste caused the taste to deteriorate. Moreover, in the rice cooking process of FIG.3 (c), although the rice cooking amount of 8 cups or more was able to be cooked favorably, the lower layer part became insufficient in the rice cooking amount of 5 cups or less, and it became the texture which made it polo polo. In the rice cooking process of FIG. 3 (b), the cooked rice 19 having a rice cooking amount of about 5 cups had almost no unevenness in the top and bottom of the rice, and the taste was good. However, when the amount of cooked rice was 3 cups or less, the lower layer portion was not sufficient, and the texture became a polo polo. When the amount of cooked rice was 8 cups or more, the lower layer portion became sticky and the taste was deteriorated. Also from the said experiment, the taste of the rice which is the cooking 20 can be improved by optimizing the time of "cooking 1".

これらの結果より、重量センサ17の信号(炊飯量)と外コイル14の通電時間との関係を、図4に示すように設定することにより、同じ食味のご飯を得ることができる。   From these results, by setting the relationship between the signal of the weight sensor 17 (the amount of rice cooking) and the energization time of the outer coil 14 as shown in FIG.

以上のように、本実施の形態においては、重量センサ17の信号により、外コイル14より通電する時間を可変することで、炊飯プロセスを可変するようにしたので、炊飯初期プロセスに外コイル14で加熱すると、調理物19中の水が鍋12の側面部を通過する外対流が促進され、調理物19の上層部の温度を上昇させることができる。この後、内コイル13および外コイル14の両方に通電することにより、調理物19の上層部の温度が下層部よりもはやく上昇するため、調理物19の下方部の炊けすぎを防止することができ、炊飯量が変化しても炊きむらを低減し、食味を向上することができる。   As described above, in the present embodiment, the rice cooking process is changed by changing the time of energization from the outer coil 14 according to the signal of the weight sensor 17, so the outer coil 14 is used for the initial rice cooking process. When heated, the external convection in which the water in the cooking 19 passes through the side surface of the pan 12 is promoted, and the temperature of the upper layer of the cooking 19 can be increased. Thereafter, by energizing both the inner coil 13 and the outer coil 14, the temperature of the upper layer portion of the cooked food 19 rises higher than that of the lower layer portion, so that overcooking of the lower portion of the cooked item 19 can be prevented. Even if the amount of cooked rice changes, the cooking unevenness can be reduced and the taste can be improved.

(実施の形態2)
図1に示す制御手段15は、炊飯開始後、調理物19を沸騰させる「炊き上げ2」において、重量センサ17の信号により、炊飯加熱量を可変するようにしている。他の構成は上記実施の形態1と同じである。
(Embodiment 2)
The control means 15 shown in FIG. 1 is configured to vary the amount of rice cooking heating by the signal from the weight sensor 17 in “cooking 2” in which the cooked food 19 is boiled after the start of rice cooking. Other configurations are the same as those of the first embodiment.

上記構成において動作、作用を説明する。「炊き上げ2」においては、調理物19の温度上昇の勾配を略一定にすることにより、調理物19である米の吸水率を略一定にできるため、重量センサ17の信号により、内コイル13および外コイル14の通電比率を可変にして、炊飯加熱量を可変することにより、炊飯量による食味の差を改善することができる。   The operation and action of the above configuration will be described. In “cooking 2”, the water absorption rate of the rice that is the cooked product 19 can be made substantially constant by making the gradient of the temperature rise of the cooked product 19 substantially constant. And by making the energization ratio of the outer coil 14 variable and changing the amount of cooked rice, the difference in taste due to the amount of cooked rice can be improved.

すなわち、内コイル13および外コイル14の通電比率を同じにして炊飯した場合、炊飯量が、例えば1カップの場合と5カップの場合とでは、調理物19の温度上昇の勾配は、1カップ炊飯の場合の方が大きくなる。この場合、調理物19であるご飯が十分吸水できないまま沸騰してしまい、芯の硬いご飯となり、食味を落としていた。   That is, when rice is cooked at the same energization ratio of the inner coil 13 and the outer coil 14, the temperature rise gradient of the cooked item 19 is 1 cup rice cooked when the amount of rice cooked is, for example, 1 cup and 5 cups. In the case of. In this case, the cooked rice 19 boiled without being able to absorb water sufficiently, resulting in a hard-core rice, and the taste was reduced.

本実施の形態では、1カップ炊飯では、内コイル13および外コイル14にオンオフ通電し、通電比率を約30%にして炊飯することにより、5カップ炊飯時の調理物19の温度上昇の勾配とほぼ同じにすることができ、食味を向上することができる。   In the present embodiment, in 1-cup rice cooking, the inner coil 13 and the outer coil 14 are energized on and off, and the energization ratio is about 30%. It can be made almost the same, and the taste can be improved.

すなわち、重量センサ17の信号(炊飯量)と内コイル13および外コイル14の通電比率、いいかえれば、重量センサ17の信号(炊飯量)と炊飯加熱量との関係を、図5に示すように設定することにより、調理物19の温度上昇の勾配を略一定にすることができ、調理物19である米の吸水率を略一定にできるため、食味を向上することができる。   That is, as shown in FIG. 5, the relationship between the signal (rice cooking amount) of the weight sensor 17 and the energization ratio of the inner coil 13 and the outer coil 14, in other words, the signal (rice cooking amount) of the weight sensor 17 and the heating amount of rice cooking. By setting, the gradient of the temperature rise of the cooked product 19 can be made substantially constant, and the water absorption rate of the rice that is the cooked product 19 can be made substantially constant, so that the taste can be improved.

以上のように、本実施の形態においては、制御手段15は、炊飯開始後、調理物19を沸騰させる「炊き上げ2」において、重量センサ17の信号により、炊飯加熱量を可変するようにしたので、調理物19の温度上昇の勾配を略一定にすることができ、炊飯量による食味の差をより向上することができる。   As mentioned above, in this Embodiment, the control means 15 was made to change the amount of rice cooking heating by the signal of the weight sensor 17 in "cooking 2" which boiled the foodstuff 19 after a rice cooking start. Therefore, the gradient of the temperature rise of the cooked item 19 can be made substantially constant, and the difference in taste depending on the amount of cooked rice can be further improved.

(実施の形態3)
図1に示す制御手段15は、炊飯開始後、調理物19を沸騰させる「炊き上げ2」において、重量センサ17の信号により、内コイル13と外コイル14の通電比率を可変するようにしている。他の構成は上記実施の形態1と同じである。
(Embodiment 3)
The control means 15 shown in FIG. 1 is configured to vary the energization ratio between the inner coil 13 and the outer coil 14 according to a signal from the weight sensor 17 in “cooking 2” in which the cooked food 19 is boiled after the start of cooking. . Other configurations are the same as those of the first embodiment.

上記構成において動作、作用を説明する。「炊き上げ2」で内コイル13と外コイル14の通電比率を可変することによって、調理物19の上層部と下層部の温度差を作ることができる。具体的には、重量センサ17の信号により、調理物19の量が多いと判断された場合は、外コイル14の通電率を上げることにより、調理物19中の水は、鍋12の側部を通過する外対流が強くなる。このため、調理物19の上層部と下層部の温度差が増加し、下層部のべちゃつきを防ぐことができる。また、調理物19の量が少ないと判断された場合は、内コイル13の通電比率を上げることで、炊きむらの少ないご飯を炊くことができる。   The operation and action of the above configuration will be described. By changing the energization ratio of the inner coil 13 and the outer coil 14 by “cooking 2”, the temperature difference between the upper layer portion and the lower layer portion of the cooked food 19 can be made. Specifically, when it is determined from the signal from the weight sensor 17 that the amount of the cooked item 19 is large, the energization rate of the outer coil 14 is increased so that the water in the cooked product 19 is discharged from the side of the pan 12. The external convection passing through becomes stronger. For this reason, the temperature difference between the upper layer portion and the lower layer portion of the cooked food 19 increases, and the lower layer portion can be prevented from becoming sticky. In addition, when it is determined that the amount of the cooked item 19 is small, it is possible to cook rice with less uneven cooking by increasing the energization ratio of the inner coil 13.

以上のように、本実施の形態においては、制御手段15は、炊飯開始後、調理物19を沸騰させる「炊き上げ2」において、重量センサ17の信号により、内コイル13と外コイル14の通電比率を可変するようにしたので、外コイル14の通電時間を制御することにより、調理物19の上層部と下層部の温度差を制御することができるので、炊飯量が変化してもより炊きむらを抑え、食味を向上することができる。   As described above, in the present embodiment, the control means 15 energizes the inner coil 13 and the outer coil 14 according to the signal of the weight sensor 17 in “cooking 2” in which the cooked food 19 is boiled after the start of cooking. Since the ratio is variable, the temperature difference between the upper layer and the lower layer of the food 19 can be controlled by controlling the energization time of the outer coil 14, so that even if the amount of cooked rice changes, it cooks more. Unevenness can be suppressed and the taste can be improved.

(実施の形態4)
図1に示す制御手段15は、図6に示すように、「前炊き」、「炊き上げ2」、「沸騰」、「追い炊き」、「蒸らし」の各工程を実施し、炊飯開始後、「前炊き」工程において、重量センサ17の信号により、前炊き温度を可変するようにしている。他の構成は上記実施の形態1と同じである。
(Embodiment 4)
As shown in FIG. 6, the control means 15 shown in FIG. 1 performs the steps of “preparation”, “cooking 2”, “boiling”, “cooking”, and “steaming”, and after cooking rice, In the “preparation” step, the preparation temperature is made variable by a signal from the weight sensor 17. Other configurations are the same as those of the first embodiment.

上記構成において動作、作用を説明する。鍋12内に調理物19である米・水を投入し、図6に示すように、「前炊き」工程において、内コイル13および外コイル14に通電する。「前炊き」工程とは、調理物19である米・水を所定温度(35℃〜60℃)で所定時間(5分〜30分)に保ち、米に水を十分吸水させる工程である。この「前炊き」工程では、大きな電力を入れると調理物が局部的に加熱され、かつ長く維持されるため局部的なべちゃになりやすい傾向があり、これを防ぐために小電力でゆっくり加熱している。小電力で加熱すると調理物19の対流が起こりにくくなり、下層部の温度が上がりやすくなる。   The operation and action of the above configuration will be described. Rice / water that is the cooked food 19 is put into the pan 12 and, as shown in FIG. 6, the inner coil 13 and the outer coil 14 are energized in the “prepared cooking” step. The “pre-cooking” step is a step in which the rice and water as the cooked item 19 are kept at a predetermined temperature (35 ° C. to 60 ° C.) for a predetermined time (5 to 30 minutes), and the rice is sufficiently absorbed by water. In this “pre-cooking” process, when large electric power is applied, the food is heated locally and tends to be localized because it is maintained for a long time. To prevent this, heat slowly with low power. Yes. When heated with a small electric power, convection of the food 19 is less likely to occur, and the temperature of the lower layer portion is likely to rise.

その結果、底センサ16の検知温度が高くなりやすくなるため、調理物19の温度と底センサ16の検知温度にかい離が生じる。特に、炊飯量が増加するとかい離が大きくなるため、図7に示すように、重量センサ17の信号(炊飯量)に応じて、前炊き温度を可変することによって、調理物19の温度を炊飯量に関係なくほぼ一定の温度にすることができ、炊飯量が変わっても炊飯性能を安定化させることができる。   As a result, the temperature detected by the bottom sensor 16 tends to be high, and thus the temperature of the food 19 and the temperature detected by the bottom sensor 16 are separated. In particular, since the separation increases as the amount of cooked rice increases, as shown in FIG. 7, the temperature of the cooked item 19 is changed to the amount of cooked rice by varying the pre-cooking temperature in accordance with the signal (the amount of cooked rice) of the weight sensor 17. Regardless of the temperature, the temperature can be kept almost constant, and the rice cooking performance can be stabilized even if the amount of cooked rice changes.

以上のように、本実施の形態においては、制御手段15は、炊飯開始後、調理物に吸水させる前炊き工程において、重量センサ17の信号により、前炊き温度を可変するようにしたので、米水等の調理物の温度を一定にすることができ、炊飯量が変わっても炊き上がりを安定化させることができる。   As mentioned above, in this Embodiment, since the control means 15 made it change the pre-cooking temperature with the signal of the weight sensor 17 in the pre-cooking process which makes a foodstuff absorb water after a rice cooking start, The temperature of the food such as water can be made constant, and the cooked rice can be stabilized even if the amount of cooked rice changes.

なお、上記各実施の形態では、炊飯初期プロセスである「前炊き」工程、「炊き上げ」工程について説明しているが、この工程に限らず重量センサ17の検知信号により炊飯プロセスを可変するものは、同等の効果が得られる。   In each of the above embodiments, the “pre-cooking” process and the “cooking” process, which are initial rice cooking processes, are described. However, the present invention is not limited to this process, and the rice cooking process is varied by the detection signal of the weight sensor 17. The equivalent effect can be obtained.

以上のように、本発明にかかる電気炊飯器は、炊飯量が変化しても炊きむらを低減し、美味しいご飯を炊くことができるので、鍋の底面部を加熱する第1の加熱手段と鍋の底側面部または鍋の側面部を加熱する第2の加熱手段の通電を制御して炊飯する炊飯器として有用である。   As described above, the electric rice cooker according to the present invention can reduce uneven cooking and cook delicious rice even if the amount of cooked rice changes, so the first heating means and pan for heating the bottom of the pan This is useful as a rice cooker that cooks rice by controlling the energization of the second heating means for heating the bottom side surface portion or the side surface portion of the pan.

本発明の実施の形態1における電気炊飯器の一部切欠した側面図Side view in which the electric rice cooker in Embodiment 1 of the present invention is partially cut away 同電気炊飯器の炊飯プロセス図Cooking process diagram of the electric rice cooker (a)同炊飯器の「炊き上げ1」の時間が0分のときの調理物の温度変化を示すタイムチャート(b)同炊飯器の「炊き上げ1」の時間が3分のときの調理物の温度変化を示すタイムチャート(c)同炊飯器の「炊き上げ1」の時間が6分のときの調理物の温度変化を示すタイムチャート(A) Time chart showing temperature change of cooked food when time of “cooking 1” of the rice cooker is 0 minutes (b) Cooking when time of “cooking 1” of the rice cooker is 3 minutes Time chart showing temperature change of food (c) Time chart showing temperature change of food when "cooking 1" time of the rice cooker is 6 minutes 同電気炊飯器の炊飯量と同じ食味のご飯を得るための「炊き上げ1」の時間との関係図Relationship diagram with time of “cooking 1” to obtain rice with the same taste as the amount of rice cooked by the electric rice cooker 本発明の実施の形態2における電気炊飯器の炊飯量と同じ食味のご飯を得るための炊飯加熱量との関係図Relationship diagram with the amount of cooked rice to obtain rice having the same taste as the amount of rice cooked by the electric rice cooker in Embodiment 2 of the present invention 本発明の実施の形態4における電気炊飯器の炊飯プロセス図Rice cooking process diagram of electric rice cooker in Embodiment 4 of the present invention 同電気炊飯器の炊飯量と同じ食味のご飯を得るための前炊き温度との関係図Relationship diagram with pre-cooking temperature to obtain rice with the same taste as the amount of rice cooked by the electric rice cooker 従来の電気炊飯器の一部切欠した側面図Partially cutaway side view of a conventional electric rice cooker

符号の説明Explanation of symbols

10 炊飯器本体
12 鍋
13 内コイル(第1の加熱手段)
14 外コイル(第2の加熱手段)
15 制御手段
16 底センサ(温度検知手段)
17 重量センサ(重量検知手段)
19 調理物
10 Rice cooker body 12 Pan 13 Inner coil (first heating means)
14 Outer coil (second heating means)
15 Control means 16 Bottom sensor (temperature detection means)
17 Weight sensor (weight detection means)
19 Cooking

Claims (5)

炊飯器本体と、この炊飯器本体に着脱自在に収納され調理物を入れる鍋と、前記鍋の底面部を加熱する第1の加熱手段と、前記第1の加熱手段の外側に位置し前記鍋の底側面部または鍋の側面部を加熱する第2の加熱手段と、前記第1および第2の加熱手段の通電を制御する制御手段と、調理物の温度を検知する温度検知手段と、調理物の量を検知する重量検知手段とを備え、前記制御手段は、前記重量検知手段の信号により炊飯プロセスを可変するようにした電気炊飯器。 A rice cooker main body, a pan that is detachably stored in the rice cooker main body, puts cooked food, a first heating means that heats the bottom surface of the pan, and the pan located outside the first heating means Second heating means for heating the bottom side surface portion or the side surface portion of the pan, control means for controlling energization of the first and second heating means, temperature detection means for detecting the temperature of the food, and cooking An electric rice cooker comprising weight detection means for detecting the amount of an object, wherein the control means varies the rice cooking process according to a signal from the weight detection means. 制御手段は、炊飯開始後、重量検知手段の信号により、主に第2の加熱手段より通電する時間を可変するようにした請求項1記載の電気炊飯器。 2. The electric rice cooker according to claim 1, wherein after the start of rice cooking, the time for energizing the second heating means is mainly changed by a signal from the weight detection means. 制御手段は、炊飯開始後、調理物を沸騰させる炊き上げ工程において、重量検知手段の信号により、炊飯加熱量を可変するようにした請求項1記載の電気炊飯器。 2. The electric rice cooker according to claim 1, wherein the control means is configured to vary the amount of rice cooking heat in accordance with a signal from the weight detection means in the cooking step of boiling the cooked food after starting the rice cooking. 制御手段は、炊飯開始後、調理物を沸騰させる炊き上げ工程において、重量検知手段の信号により、第1の加熱手段と第2の加熱手段の通電比率を可変するようにした請求項1記載の電気炊飯器。 2. The control means according to claim 1, wherein after the start of cooking rice, in the cooking step of boiling the cooked product, the energization ratio of the first heating means and the second heating means is varied by a signal from the weight detection means. Electric rice cooker. 制御手段は、炊飯開始後、調理物に吸水させる前炊き工程において、重量検知手段の信号により、前炊き温度を可変するようにした請求項1記載の電気炊飯器。 The electric rice cooker according to claim 1, wherein the control means varies the pre-cooking temperature in accordance with a signal from the weight detection means in a pre-cooking process in which the cooked product absorbs water after starting rice cooking.
JP2003408612A 2003-12-08 2003-12-08 Electric rice cooker Pending JP2005168548A (en)

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EP2540199A1 (en) * 2010-02-22 2013-01-02 Duo Ai Jia (Beijing) Science and Technology Co., Ltd Electric heating cooker with weighing function and weighing control method thereof
WO2016041352A1 (en) * 2014-09-17 2016-03-24 佛山市顺德区美的电热电器制造有限公司 Electric rice cooker and heating control method thereof
CN106264176A (en) * 2015-06-01 2017-01-04 佛山市顺德区美的电热电器制造有限公司 The heating means of the heater of cooking apparatus
CN108244984A (en) * 2017-11-27 2018-07-06 浙江苏泊尔家电制造有限公司 Realize method, cooking apparatus and the computer storage media of frying function
CN108567312A (en) * 2018-02-09 2018-09-25 浙江苏泊尔家电制造有限公司 Porridge-cooking control method and cooking apparatus for cooking apparatus
CN110200472A (en) * 2018-02-28 2019-09-06 浙江苏泊尔家电制造有限公司 Cooking control method and cooking apparatus for cooking apparatus
CN113439991A (en) * 2021-08-16 2021-09-28 珠海格力电器股份有限公司 Cooking method, control device, storage medium, control device and appliance

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2540199A1 (en) * 2010-02-22 2013-01-02 Duo Ai Jia (Beijing) Science and Technology Co., Ltd Electric heating cooker with weighing function and weighing control method thereof
EP2540199A4 (en) * 2010-02-22 2014-12-24 Duo Ai Jia Beijing Science And Technology Co Ltd Electric heating cooker with weighing function and weighing control method thereof
WO2016041352A1 (en) * 2014-09-17 2016-03-24 佛山市顺德区美的电热电器制造有限公司 Electric rice cooker and heating control method thereof
CN106264176A (en) * 2015-06-01 2017-01-04 佛山市顺德区美的电热电器制造有限公司 The heating means of the heater of cooking apparatus
CN106264176B (en) * 2015-06-01 2019-02-15 佛山市顺德区美的电热电器制造有限公司 The heating means of the heating device of cooking apparatus
CN108244984A (en) * 2017-11-27 2018-07-06 浙江苏泊尔家电制造有限公司 Realize method, cooking apparatus and the computer storage media of frying function
CN108244984B (en) * 2017-11-27 2021-09-14 浙江苏泊尔家电制造有限公司 Method for realizing frying function, cooking utensil and computer storage medium
CN108567312A (en) * 2018-02-09 2018-09-25 浙江苏泊尔家电制造有限公司 Porridge-cooking control method and cooking apparatus for cooking apparatus
CN108567312B (en) * 2018-02-09 2024-04-05 浙江苏泊尔家电制造有限公司 Porridge cooking control method for cooking appliance and cooking appliance
CN110200472A (en) * 2018-02-28 2019-09-06 浙江苏泊尔家电制造有限公司 Cooking control method and cooking apparatus for cooking apparatus
CN113439991A (en) * 2021-08-16 2021-09-28 珠海格力电器股份有限公司 Cooking method, control device, storage medium, control device and appliance
CN113439991B (en) * 2021-08-16 2022-06-17 珠海格力电器股份有限公司 Cooking method, control device, storage medium, control device and appliance

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