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JP2004248900A - rice cooker - Google Patents

rice cooker Download PDF

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Publication number
JP2004248900A
JP2004248900A JP2003042837A JP2003042837A JP2004248900A JP 2004248900 A JP2004248900 A JP 2004248900A JP 2003042837 A JP2003042837 A JP 2003042837A JP 2003042837 A JP2003042837 A JP 2003042837A JP 2004248900 A JP2004248900 A JP 2004248900A
Authority
JP
Japan
Prior art keywords
rice
water storage
steam
pot
lid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2003042837A
Other languages
Japanese (ja)
Inventor
Kuniyuki Nakanishi
邦行 中西
Norio Ikeda
典生 池田
Akihiro Shinabe
晃宏 品部
Atsushi Koma
敦 高麗
Keiji Ishikawa
啓治 石川
Yasuyuki Mimura
泰幸 三村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP2003042837A priority Critical patent/JP2004248900A/en
Publication of JP2004248900A publication Critical patent/JP2004248900A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a rice cooker with improved rice cooking performance, capable of facilitating the gelatinization of rice without drying rice in the upper layer of a pot regardless of the quantity of rice to be cooked. <P>SOLUTION: The rice cooker comprises a pot heating means 4 for heating the pot 2, a lid 3 for covering an opening of the pot, a steam generating means 5 for generating steam for cooking/heating rice, and a steam channel 10 for feeding the steam to the upper part inside the pot in the rice cooking process. The rice cooker also has a water reservoir lid (an inhibiting member) 11 for inhibiting penetration of hot water into the steam channel 10 by the steam generating means 5. Accordingly, since rice is cooked with the steam for cooking/heating rice while penetration of hot water caused by the generated steam into the pot 2 is inhibited, the rice in the upper layer of the pot is not dried regardless of the quantity of rice to be cooked and gelatinization of rice is facilitated, so that the rice cooking performance of the rice cooker is improved. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、炊飯加熱用の蒸気を利用して炊飯性能の向上をはかった炊飯器に関するものである。
【0002】
【従来の技術】
一般的な家庭用の炊飯器においては、鍋底部に配置した鍋加熱手段と、蓋内に配置した蓋加熱手段とを用いて、鍋内の米と水を上下から均一に加熱することにより、米の糊化を促進し、炊飯性能を向上させるようにしている(例えば、特許文献1参照)。
【0003】
ところで、この従来の炊飯器においては、炊飯の最終工程である蒸らし工程で加熱を継続し、米澱粉の湖化を完成させることが炊飯性能を向上させるための必須要件であるが、鍋加熱手段により加熱を継続すると、鍋底付近の米飯が焦げてしまうため、加熱を弱めるものである。この加熱を弱めることに伴う糊化不足を防止し、炊飯性能を向上させるために、蓋加熱手段は、高熱源で鍋開口部の上方から米を加熱するものである。
【0004】
【特許文献1】
特許第988050号公報
【0005】
【発明が解決しようとする課題】
しかしながら、上記の従来構成の炊飯器では、特に、鍋内上層の米が、高熱源である蓋加熱手段の熱放射により、直接加熱されることになるため、蒸らし工程においては、飯の水分が蒸発して乾燥するという現象が生じる。従って、鍋上層では乾燥して食味が落ちてしまうものである。これは、炊飯量が多いほど、加熱量を多くしなければならないにも拘わらず、炊飯量が多くなるほど、上層の米は蓋加熱手段に接近するので乾燥しやすくなる課題があった。
【0006】
本発明は、上記従来の課題を解決するもので、炊飯量に拘わらず鍋上層の米が乾燥せず、しかも米の糊化を促進し、炊飯性能を向上させた炊飯器を提供することを目的とするものである。
【0007】
【課題を解決するための手段】
上記目的を達成するために、本発明の炊飯器は、炊飯工程において炊飯加熱用の蒸気を鍋内の上方に供給して炊飯するとともに、蒸気発生による熱水が鍋内に進入することを抑制するようにしたものである。
【0008】
これにより、炊飯加熱用の蒸気を利用して炊飯が行われるとともに蒸気発生による熱水の鍋内への進入を抑制しているため、炊飯量に拘わらず鍋上層の米が乾燥せず、しかも米の糊化が促進され、炊飯性能が向上するものである。
【0009】
【発明の実施の形態】
請求項1に記載の発明は、鍋と、前記鍋を加熱する鍋加熱手段と、前記鍋の開口部を覆う蓋と、炊飯加熱用の蒸気を発生させる蒸気発生手段と、前記蒸気を炊飯工程において前記鍋内の上方に供給する蒸気経路とを備え、前記蒸気発生手段から前記蒸気経路への連通部には、蒸気発生手段による熱水の蒸気経路への進入を抑制する抑止部材を設けた炊飯器とすることにより、炊飯加熱用の蒸気を利用して炊飯が行われるとともに蒸気発生による熱水の鍋内への進入を抑制しているため、炊飯量に拘わらず鍋上層の米が乾燥せず、しかも米の糊化が促進され、炊飯性能が向上するものである。
【0010】
請求項2に記載の発明は、蒸気発生手段は、貯水部とこれを加熱する貯水部加熱手段を有し、抑止部材は、貯水部の開口部を覆い、かつ米が通過しない大きさの穴を有する貯水部蓋とした請求項1に記載の炊飯器とすることにより、米やご飯が貯水部に入り込むことを抑止して、貯水部が不衛生な状態になることを低減し、また貯水部の洗浄の手間を低減することができる。
【0011】
請求項3に記載の発明は、貯水部蓋の穴の上面は、穴に向かって傾斜したすり鉢状としている請求項2に記載の炊飯器とすることにより、貯水部内の水が沸騰している際に飛び跳ねた熱水が貯水部蓋上面に付着した場合でも、熱水が貯水部内へ流れ落ちやすくなる。これにより、熱の伝わりにくい貯水部蓋上面で熱水が冷やされ周囲の蒸気から熱量を奪って蒸気を液化させて蒸気の発生量を低下させる、というようなことを低減することができる。このため、所定量の蒸気を発生させて所定の炊飯性能を発揮することが可能となる。
【0012】
請求項4に記載の発明は、鍋の開口部を覆う蓋を閉めることにより、抑止部材の少なくとも一部が開放される請求項1に記載の炊飯器とすることにより、蓋を開いている場合には、貯水部蓋を閉じておくことで、米やご飯が入り込みにくくすることができ、米やご飯が貯水部に固着して貯水部が不衛生な状態になることを低減できる。
【0013】
請求項5に記載の発明は、蒸気発生手段の貯水部を取り外し可能とするとともに、貯水部蓋は貯水部を収納する収納部側に取り付けた請求項2または3に記載の炊飯器とすることにより、貯水部が外されている場合にも貯水部蓋を閉じることで、貯水部を収納する収納部に米やご飯が入り込み、貯水部が所定通りにセットできなくなり、蒸気漏れなどの不具合が生じることを低減することができ、所定の炊飯性能を発揮することが可能となる。
【0014】
請求項6に記載の発明は、貯水部蓋は、鍋の開口部を覆う蓋の開放により自動開放する請求項5に記載の炊飯器とすることにより、使用者が貯水部を取り外す際に、まず蓋と貯水部蓋を開放するという2重の手間がなく、作業性がよいものとなる。
【0015】
請求項7に記載の発明は、貯水部蓋は、貯水部が一定温度以下となるまでは閉止される請求項4または5のいずれか1項に記載の炊飯器とすることにより、炊飯直後など貯水部がまだ高温の場合には貯水部蓋を閉じたままにして、使用者が熱水に触れたり、加熱した貯水部自体に触れることを低減し、安全に使用することができる。
【0016】
【実施例】
以下本発明の実施例について、図面を参照しながら説明する。
【0017】
(実施例1)
図1は本発明の実施例1における炊飯器を示すものである。
【0018】
図に示すように、炊飯器本体1は米と水を収納する鍋2と、鍋2の底部および側部を加熱する鍋加熱手段3と、鍋2の上方の開口部を覆う蓋3と、炊飯加熱用の蒸気を発生させる蒸気発生手段5を備えている。蓋3には、鍋2の上方開口部を密閉する内蓋6が設けられており、また、内蓋6を加熱する内蓋加熱手段7が設けられている。
【0019】
前記蒸気発生手段5は、取り外し自在な貯水部8と、貯水部8の収納部に設けた貯水部加熱手段9を有し、鍋2の横方向に設置されている。また、蓋3内には、貯水部8から発生した蒸気を炊飯工程において鍋2内の上方に供給するための蒸気経路10が設けられている。この蒸気経路10は貯水部8の上方開口部と鍋2内の上方とを連通接続するものであり、貯水部8から細く絞った蒸気経路水平部10aを通り、内蓋6を貫通して鍋2内の上方に臨んでいる。
【0020】
また、蒸気発生手段5から蒸気経路10への連通部には、蒸気発生手段5による熱水の蒸気経路10への進入を抑制する抑止部材を設けている。この抑止部材は、本実施例においては、貯水部8の開口部を着脱自在に覆い、かつ米が通過しない大きさの穴11aを有する貯水部蓋11が相当するものである。貯水部蓋11の穴11aの上面は、穴11aに向かって傾斜したすり鉢状としている。
【0021】
制御手段12は、炊飯工程が始まると、所定のプログラムにしたがって鍋加熱手段4、内蓋加熱手段7および貯水部加熱手段9を加熱制御し、炊飯を行わせるものである。なお、鍋加熱手段4、内蓋加熱手段7および貯水部加熱手段9は、誘導加熱、シーズヒータ、あるいはその他によるものであって、特に、限定されるものではない。
【0022】
上記構成において、以下、動作を説明する。
【0023】
使用者は、米と水を鍋2に、また所定量の水を貯水部8にそれぞれセットし、炊飯器の電源を入れ、炊飯開始ボタン(図示せず)を押すと炊飯工程が開始される。炊飯工程が始まると所定のプログラムにしたがって鍋加熱手段4、内蓋加熱手段7、および貯水部加熱手段9が加熱をはじめる。炊飯中、貯水部8内の水は貯水部加熱手段9によって蒸発し、約100℃の蒸気となって蒸気経路10に流入する。この蒸気はさらに内蓋加熱手段7によって100℃を超える蒸気にまで加熱され、ご飯に必要な熱量を鍋2内の上方から与える。炊飯工程が終了すると、自動的に保温工程に移行し、使用者はいつでもあたたかいご飯を得られる。
【0024】
すなわち、炊飯工程においては、大気圧下、水の沸点(100℃)以上の加熱蒸気を米に供給することにより、蒸らし工程においても飯の乾燥を伴わない。しかも、100℃以下の蒸気供給では米粒表面に水が付着するに留まるが、100℃以上の蒸気であるので、米の糊化を進行させるのに必要なエネルギーをもち、糊化を促進し、炊飯性能を向上させることができるものである。さらに炊飯量に拘わらず、最適な加熱量を設定できるものである。
【0025】
しかも、貯水部8内の水を沸騰させる際に、貯水部8内の熱水は激しく飛び跳ねるが、貯水部蓋11があることで、飛び跳ねた熱水は貯水部蓋11に当たって、それ以上、上方に飛び跳ねることが抑制される。したがって、本実施例によれば、熱水が蒸気経路水平部10aにまで入り込んで貯水部8に容易には戻らなくなるということがなく、また蒸気経路10が加熱されていないために、熱水が蒸気経路10壁面によって冷やされ、周囲の100℃以上の蒸気から熱を奪うことで、蒸気が所定の熱量を米に与えられなくなるということも低減することができる。このため、所定の炊飯性能を発揮する炊飯器を提供することが可能となる。
【0026】
また、貯水部蓋11には米やご飯が通過できない大きさの穴11aが複数設けられている。これにより、使用者が鍋2に米と水をセットする際や炊き上がった後に鍋2内のご飯を混ぜる際などに、米やご飯が貯水部8に入り込むことを低減することができる。そのため、米やご飯が貯水部8に固着して貯水部8が不衛生になる原因となることを低減し、貯水部8の洗浄の手間を低減することができる。
【0027】
さらに、貯水部蓋11の上面は穴11aに向かって傾斜しているすり鉢状であるため、熱水が貯水部蓋11の穴11aから飛び出て貯水部蓋11の上面に乗った際にも、熱水は貯水部蓋11の穴11aから貯水部8に戻りやすくなる。このことにより、貯水部蓋11上に乗った熱水が冷やされ、周囲の100℃以上の蒸気から熱を奪うために、蒸気が所定の熱量を米に与えられなくなるということを低減することができ、所定の炊飯性能を発揮することができる。
【0028】
なお、内蓋加熱手段7の加熱によらず、貯水部加熱手段9により、貯水部8の水の蒸発と、蒸気を100℃以上に加熱する方式にしても、同様の効果が得られるものである。
【0029】
また、例えば、蒸気経路水平部10aに別に蒸気経路加熱手段を設け、蒸気経路10において蒸気を100℃以上に加熱すると、蒸気経路10を加熱できるので、蒸気経路10に熱水が付着して冷やされることを低減することができ、さらに有用である。
【0030】
また、保温工程においても蒸気発生手段5からの蒸気を鍋2に供給するようにすれば、ご飯に不足した水分を補うとともに熱も与えることができ、有用である。
【0031】
(実施例2)
図2は本発明の実施例2における炊飯器を示すものである。実施例1と同一部分は同一符号を付して説明を省略し、相違点についてのみ説明する。
【0032】
本実施例は、穴無しで貯水部8の開口部全てを閉じる貯水部蓋13を設けている。この貯水部蓋13は、熱水の蒸気経路10への進入を抑制する抑止部材に相当するものである。貯水部蓋13は外力が加わらなければ常時は貯水部8の開口部全てを閉じている。ここで、蓋3を閉じると、その突部3aが、貯水部蓋13の一部を押して軸支された一蓋部13aを開くようになっている。
【0033】
蓋3が開いている状態を図2(a)に、蓋3が閉じている状態を図2(b)に示している。
【0034】
このように、本実施例によれば、蓋3が開いている状態では、貯水部蓋13は閉じているので、使用者が蓋3を開いて米をセットしたり、ご飯を混ぜて、米やご飯が鍋2の外部へ出たとしても、貯水部8の内部に入り込むことを低減することができる。そのため、米やご飯が貯水部8に入り込んで貯水部8や貯水部8内の水が不衛生な状態になったりすることがなくなり、米やご飯が貯水部8に固着した場合における貯水部8の洗浄の手間が低減する。
【0035】
なお、本実施例においては、蓋3を閉じると貯水部蓋13の一蓋部13aのみを開くようにしている。これは、貯水部蓋13全体が開くようにすると、貯水部8の水が沸騰した際に熱水が貯水部蓋13に乗って冷やされ、蒸気の熱を奪うということが生じる恐れがあるからである。
【0036】
(実施例3)
図3は本発明の実施例3における炊飯器の要部構成を示すものである。実施例1と同一部分は同一符号を付して説明を省略し、相違点についてのみ説明する。
【0037】
本実施例は、蒸気発生手段5の貯水部8を収納部15から取り外し可能とするとともに、米やご飯が通過しない大きさの複数の穴14aが設けられている貯水部蓋14を炊飯器本体1側、すなわち収納部15側に取り付けたものである。
【0038】
また、炊飯器本体1にはピン16とバネ17を設けてあり、鍋2の開口部を覆う蓋3の開放により、バネ17の力によりピン16が貯水部蓋14を押し上げて一端の軸14bを中心に貯水部蓋14を自動開放するようになっている。
【0039】
なお、貯水部蓋14の他端は、貯水部蓋固定リブ18で常時は固定されている。この貯水部蓋固定リブ18は、蓋3を閉じると固定リブ開放手段19により操作されて、貯水部蓋14の固定を開放するが、貯水部蓋14は蒸気経路10の一部によって貯水部8を覆った状態で固定される。
【0040】
貯水部蓋固定リブ18は、固定リブ開放手段19による操作以外に、手操作によっても操作できるものであり、蓋3の開放時には自由に貯水部蓋14の固定を開放して貯水部8を取り出すことができる。
【0041】
また、固定リブ開放手段19は、一定時間内は、制御手段12により図中矢印方向に移動され、貯水部蓋固定リブ18と離れているものである。その間、貯水部蓋14は、貯水部蓋固定リブ18で固定されている。固定リブ開放手段19が図中矢印方向に移動されている一定時間とは、炊飯終了後、貯水部8が一定温度以下となるまでの時間、すなわち貯水部8の加熱部分の温度や、水温が触れて問題のない温度にまで下がるのに必要な時間である。
【0042】
このように、本実施例によれば、貯水部蓋14を炊飯器本体1側、すなわち収納部15側に取り付けたことにより、貯水部8を炊飯器本体1から外した状態で米をセットしたり、ご飯を混ぜたりする際も、貯水部蓋14を閉じることができ、米やご飯が収納部15に入り込むことを低減することができる。そのため、米やご飯が収納部15に入り込んで貯水部8との間に挟まり、貯水部8が所定の場所からずれて設置され、貯水部8と蒸気経路10間の密閉ができず、蒸気が漏れてしまうというような不具合が生じることを低減することができる。また、収納部15の手入れの手間を低減することができるものである。
【0043】
また、貯水部蓋14は、鍋2の開口部を覆う蓋3の開放によりピン16とバネ17作用で自動開放することにより、使用者が貯水部8を取り出すために蓋3を開いてから貯水部蓋14を開くという二重の手順を、蓋開放ボタン(図示せず)を押すという一つの動作で実行することを可能とし、使用者の手間を低減することができる。
【0044】
また、貯水部蓋14は、制御手段12、貯水部蓋固定リブ18、固定リブ開放手段19の作用により、貯水部8が一定温度以下となるまでは閉止されることにより、炊飯直後など貯水部8がまだ高温の場合には貯水部蓋14を閉じたままにして、使用者が熱水に触れたり、加熱した貯水部8自体に触れることを低減し、安全に使用することができる。なお、使用者が意図して貯水部蓋14を開放しようとする場合は、使用者が貯水部蓋固定リブ18を外すことにより、貯水部蓋14を開放することが可能である。
【0045】
なお、本実施例ではピン16やバネ17、貯水部蓋固定リブ18、固定リブ開放手段19を用いて貯水部蓋14が開放される構成となっているが、蓋3が開くと貯水部蓋14が開き、同時に安全性が確保でき留構成であれ他の構成でも良い。
【0046】
【発明の効果】
以上のように、本発明の炊飯器によれば、炊飯加熱用の蒸気を利用して炊飯が行われるとともに蒸気発生による熱水の鍋内への進入を抑制しているため、炊飯量に拘わらず鍋上層の米が乾燥せず、しかも米の糊化が促進され、炊飯性能が向上するものである。
【図面の簡単な説明】
【図1】本発明の実施例1における炊飯器を示す断面図
【図2】(a)本発明の実施例2における炊飯器の蓋開放時を示す断面図
(b)同炊飯器の蓋閉成時を示す断面図
【図3】本発明の実施例3における炊飯器の要部を示す断面図
【符号の説明】
1 炊飯器本体
2 鍋
3 蓋
4 鍋加熱手段
5 蒸気発生手段
8 貯水部
9 貯水部加熱手段
10 蒸気経路
11、13、14 貯水部蓋(抑止部材)
12 制御手段
15 収納部
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rice cooker in which rice cooking performance is improved using steam for cooking rice.
[0002]
[Prior art]
In a general household rice cooker, by using a pot heating means disposed at the bottom of the pot and a lid heating means disposed within the lid, the rice and water in the pan are uniformly heated from above and below, It promotes gelatinization of rice and improves rice cooking performance (for example, see Patent Document 1).
[0003]
By the way, in this conventional rice cooker, it is an essential requirement for improving rice cooking performance that heating is continued in a steaming step, which is a final step of rice cooking, to complete conversion of rice starch into a lake. If heating is continued for a while, the cooked rice near the bottom of the pot will be scorched, thus weakening the heating. The lid heating means heats the rice from above the pot opening with a high heat source in order to prevent insufficient gelatinization due to weakening the heating and improve the rice cooking performance.
[0004]
[Patent Document 1]
Japanese Patent No. 9888050 [0005]
[Problems to be solved by the invention]
However, in the rice cooker having the above-mentioned conventional configuration, particularly, rice in the upper layer in the pot is directly heated by heat radiation of the lid heating means, which is a high heat source. The phenomenon of evaporation and drying occurs. Therefore, the upper layer of the pot is dried and loses its taste. This is a problem that, although the amount of cooked rice and the amount of heating must be increased, the amount of cooked rice increases and the rice in the upper layer approaches the lid heating means, so that the rice is easily dried.
[0006]
The present invention is to solve the above-mentioned conventional problems, and to provide a rice cooker in which rice in the upper layer of a pot is not dried regardless of the amount of cooked rice, and furthermore, the gelatinization of rice is promoted and the cooked rice performance is improved. It is the purpose.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the rice cooker of the present invention supplies steam for heating rice cooking upward in the pot in the rice cooking process, cooks rice, and suppresses hot water due to steam generation from entering the pot. It is intended to be.
[0008]
As a result, rice is cooked using the steam for heating the rice, and the hot water generated by the steam is suppressed from entering the pot, so that the rice in the upper layer of the pot does not dry regardless of the amount of cooked rice, and Gelatinization of rice is promoted, and rice cooking performance is improved.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
The invention according to claim 1 includes a pot, a pot heating means for heating the pot, a lid covering an opening of the pot, a steam generating means for generating steam for heating rice cooking, and a step of cooking the steam. And a steam path for supplying the inside of the pot with an upper portion, and a communicating portion from the steam generating means to the steam path is provided with a suppression member for suppressing entry of hot water into the steam path by the steam generating means. By using a rice cooker, rice is cooked using the steam for heating rice and the hot water generated by the steam is suppressed from entering the pot, so the rice in the upper layer of the pot is dried regardless of the amount of cooked rice In addition, the gelatinization of rice is promoted, and the rice cooking performance is improved.
[0010]
According to a second aspect of the present invention, the steam generating means has a water storage part and a water storage part heating means for heating the water storage part, and the restraining member covers the opening of the water storage part and is a hole having a size that does not allow rice to pass through. The rice cooker according to claim 1, wherein the rice cooker has a water storage unit lid, which prevents rice and rice from entering the water storage unit, reduces the possibility of the water storage unit becoming unsanitary, and stores water. The labor of cleaning the part can be reduced.
[0011]
According to a third aspect of the present invention, the water in the water storage portion is boiled by the rice cooker according to the second aspect, wherein the upper surface of the hole of the water storage portion lid has a mortar shape inclined toward the hole. Even when the hot water jumps and adheres to the upper surface of the reservoir lid, the hot water easily flows into the reservoir. Accordingly, it is possible to reduce a situation in which the hot water is cooled on the upper surface of the water storage unit lid to which heat is not easily transmitted, the heat is taken from surrounding steam, the steam is liquefied, and the amount of generated steam is reduced. For this reason, it becomes possible to generate a predetermined amount of steam and exhibit predetermined rice cooking performance.
[0012]
The invention according to claim 4 is a rice cooker according to claim 1, wherein at least a part of the restraining member is opened by closing a lid that covers an opening of the pot, and the lid is opened. By closing the water storage unit lid, it is possible to make it difficult for rice and rice to enter, and to reduce the possibility that rice and rice stick to the water storage unit and the water storage unit becomes unsanitary.
[0013]
According to a fifth aspect of the present invention, in the rice cooker according to the second or third aspect, the water storage portion of the steam generating means is detachable, and the water storage portion lid is attached to a storage portion side for storing the water storage portion. By closing the water storage lid even when the water storage is removed, rice and rice enter the storage part that stores the water storage part, making it impossible to set the water storage part as specified, resulting in problems such as steam leakage. It is possible to reduce the occurrence, and it is possible to exhibit a predetermined rice cooking performance.
[0014]
The invention according to claim 6 is characterized in that the water reservoir lid is automatically opened by opening the lid covering the opening of the pot, and the rice cooker according to claim 5, when the user removes the water reservoir, First of all, there is no need to open the lid and the water storage unit lid, and workability is improved.
[0015]
In the invention according to claim 7, the water storage unit lid is closed until the water storage unit has a temperature equal to or lower than a certain temperature, so that the rice cooker according to any one of claims 4 or 5 is used, such as immediately after cooking rice. If the water storage section is still hot, the water storage section lid is kept closed, and it is possible to reduce a user's contact with hot water or the heated water storage section itself, and to use the water storage section safely.
[0016]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0017]
(Example 1)
FIG. 1 shows a rice cooker according to a first embodiment of the present invention.
[0018]
As shown in the figure, the rice cooker main body 1 has a pot 2 for storing rice and water, a pot heating means 3 for heating the bottom and sides of the pot 2, a lid 3 for covering an opening above the pot 2, A steam generator 5 for generating steam for heating rice cooking is provided. The lid 3 is provided with an inner lid 6 for closing the upper opening of the pot 2, and an inner lid heating means 7 for heating the inner lid 6.
[0019]
The steam generating means 5 has a removable water storage section 8 and a water storage section heating means 9 provided in a storage section of the water storage section 8, and is installed in the lateral direction of the pan 2. In the lid 3, a steam path 10 for supplying steam generated from the water storage section 8 to the upper part of the pot 2 in the rice cooking process is provided. The steam path 10 communicates the upper opening of the water storage section 8 with the upper part of the pot 2, passes through the steam path horizontal section 10 a narrowly narrowed from the water storage section 8, passes through the inner lid 6, and passes through the pot. 2 is facing upwards.
[0020]
Further, in a communicating portion from the steam generating means 5 to the steam path 10, a suppression member for suppressing the entry of the hot water into the steam path 10 by the steam generating means 5 is provided. In the present embodiment, the deterrent member corresponds to a water reservoir lid 11 that removably covers the opening of the water reservoir 8 and has a hole 11a of a size through which rice does not pass. The upper surface of the hole 11a of the water reservoir lid 11 has a mortar shape inclined toward the hole 11a.
[0021]
When the rice cooking process starts, the control means 12 controls the heating of the pot heating means 4, the inner lid heating means 7 and the water storage section heating means 9 in accordance with a predetermined program, and causes the rice to be cooked. In addition, the pot heating means 4, the inner lid heating means 7, and the water storage section heating means 9 are based on induction heating, a sheath heater, or others, and are not particularly limited.
[0022]
The operation of the above configuration will be described below.
[0023]
When the user sets rice and water in the pot 2 and a predetermined amount of water in the water storage section 8, respectively, turns on the rice cooker and presses a rice cooking start button (not shown) to start the rice cooking process. . When the rice cooking process starts, the pot heating means 4, the inner lid heating means 7, and the water storage section heating means 9 start heating according to a predetermined program. During rice cooking, water in the water storage section 8 is evaporated by the water storage section heating means 9, becomes steam at about 100 ° C., and flows into the steam path 10. This steam is further heated to steam exceeding 100 ° C. by the inner lid heating means 7 to give the calorie necessary for rice from above in the pot 2. When the rice cooking process is completed, the process automatically shifts to the heat retaining process, and the user can always obtain warm rice.
[0024]
That is, in the rice cooking process, the steaming process does not involve drying of the rice by supplying heated steam having a boiling point (100 ° C.) or higher of water to the rice under atmospheric pressure. In addition, when the steam is supplied at a temperature of 100 ° C. or less, only water adheres to the surface of the rice grains, but since the steam is at a temperature of 100 ° C. or more, it has the energy necessary to advance the gelatinization of rice, and promotes gelatinization. Rice cooking performance can be improved. Further, the optimum heating amount can be set regardless of the amount of cooked rice.
[0025]
Moreover, when the water in the water storage section 8 is boiled, the hot water in the water storage section 8 jumps violently, but the presence of the water storage section lid 11 causes the hot water splashed to hit the water storage section lid 11 and further upward. Jumping is suppressed. Therefore, according to the present embodiment, the hot water does not enter the steam path horizontal section 10a and does not easily return to the water storage section 8 and the hot water is not heated because the steam path 10 is not heated. By being cooled by the wall of the steam path 10 and removing heat from surrounding steam having a temperature of 100 ° C. or higher, it is possible to reduce the possibility that the steam cannot provide a predetermined amount of heat to rice. For this reason, it is possible to provide a rice cooker exhibiting predetermined rice cooking performance.
[0026]
Further, the water storage portion lid 11 is provided with a plurality of holes 11a having a size that cannot pass rice or rice. Thus, when the user sets rice and water in the pot 2 or mixes the rice in the pot 2 after cooking, the rice and rice can be reduced from entering the water storage section 8. For this reason, it is possible to reduce the possibility that the rice and rice stick to the water storage unit 8 and cause the water storage unit 8 to become unsanitary, and reduce the time and effort for cleaning the water storage unit 8.
[0027]
Furthermore, since the upper surface of the water storage unit lid 11 has a mortar shape inclined toward the hole 11a, even when hot water jumps out of the hole 11a of the water storage unit cover 11 and rides on the upper surface of the water storage unit cover 11, The hot water easily returns to the water reservoir 8 from the hole 11a of the water reservoir lid 11. As a result, the hot water on the water storage unit lid 11 is cooled, and the heat is removed from the surrounding steam of 100 ° C. or more. As a result, predetermined rice cooking performance can be exhibited.
[0028]
It should be noted that the same effect can be obtained by a method in which the water in the water storage section 8 is evaporated by the water storage section heating means 9 and the steam is heated to 100 ° C. or more by the water storage section heating means 9 without depending on the heating of the inner lid heating means 7. is there.
[0029]
Further, for example, when a steam path heating means is separately provided in the steam path horizontal portion 10a and the steam is heated to 100 ° C. or more in the steam path 10, the steam path 10 can be heated. This can be reduced, which is more useful.
[0030]
In addition, it is useful to supply the steam from the steam generating means 5 to the pot 2 also in the warming step, because it can compensate for the insufficient moisture in the rice and also provide heat.
[0031]
(Example 2)
FIG. 2 shows a rice cooker according to a second embodiment of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Only different points will be described.
[0032]
In the present embodiment, a water reservoir lid 13 that closes all openings of the water reservoir 8 without holes is provided. The water reservoir lid 13 corresponds to a deterrent member that suppresses the hot water from entering the steam path 10. The reservoir lid 13 normally closes all the openings of the reservoir 8 unless external force is applied. Here, when the lid 3 is closed, the projection 3a pushes a part of the water storage unit lid 13 to open the one lid 13a which is pivotally supported.
[0033]
FIG. 2A shows a state where the lid 3 is open, and FIG. 2B shows a state where the lid 3 is closed.
[0034]
As described above, according to the present embodiment, when the lid 3 is open, the water reservoir lid 13 is closed, so that the user can open the lid 3 to set rice, mix rice, and mix rice. Even if the rice comes out of the pot 2, it can be reduced that the rice enters the water storage section 8. Therefore, it is possible to prevent the rice and rice from entering the water storage unit 8 and the water in the water storage unit 8 and the water storage unit 8 becoming unsanitary, and the water storage unit 8 when the rice and rice adhere to the water storage unit 8. Cleaning time is reduced.
[0035]
In the present embodiment, when the lid 3 is closed, only the one lid 13a of the water storage lid 13 is opened. This is because, if the entire water storage unit lid 13 is opened, when the water in the water storage unit 8 boils, there is a possibility that hot water gets cooled on the water storage unit cover 13 and deprives the heat of the steam. It is.
[0036]
(Example 3)
FIG. 3 shows a main configuration of a rice cooker according to a third embodiment of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Only different points will be described.
[0037]
In the present embodiment, the water storage section 8 of the steam generation means 5 is detachable from the storage section 15 and the water storage section lid 14 provided with a plurality of holes 14a of a size through which rice and rice do not pass is attached to the rice cooker main body. It is attached to one side, that is, the storage part 15 side.
[0038]
The rice cooker main body 1 is provided with a pin 16 and a spring 17. By opening the lid 3 covering the opening of the pot 2, the pin 16 pushes up the water storage lid 14 by the force of the spring 17, and a shaft 14 b at one end. The water storage unit cover 14 is automatically opened around the center.
[0039]
The other end of the water storage unit cover 14 is always fixed by a water storage unit cover fixing rib 18. When the lid 3 is closed, the water storage section cover fixing rib 18 is operated by the fixing rib opening means 19 to release the fixing of the water storage section lid 14. Is fixed in a state of covering.
[0040]
The water storage unit cover fixing rib 18 can be operated not only by the operation of the fixing rib opening means 19 but also by a manual operation. When the cover 3 is opened, the water storage unit cover 14 is freely opened and the water storage unit 8 is taken out. be able to.
[0041]
Further, the fixed rib opening means 19 is moved in the direction of the arrow by the control means 12 within a certain time, and is separated from the water storage section cover fixing rib 18. During that time, the water reservoir lid 14 is fixed by the water reservoir lid fixing rib 18. The fixed time during which the fixing rib opening means 19 is moved in the direction of the arrow in the figure is a time until the water storage section 8 becomes lower than a predetermined temperature after the rice cooking, that is, the temperature of the heated portion of the water storage section 8 or the water temperature is reduced. It is the time required to reach a safe temperature to touch.
[0042]
As described above, according to the present embodiment, the rice is set in a state where the water storage section 8 is detached from the rice cooker main body 1 by attaching the water storage section lid 14 to the rice cooker main body 1 side, that is, the storage section 15 side. Also, when mixing rice or the like, the water storage unit lid 14 can be closed, and it is possible to reduce rice and rice from entering the storage unit 15. For this reason, rice and rice enter the storage unit 15 and are sandwiched between the water storage unit 8 and the water storage unit 8 is installed at a position deviated from a predetermined location, so that the water storage unit 8 and the steam path 10 cannot be sealed, and steam is not generated. It is possible to reduce the occurrence of a problem such as leakage. In addition, it is possible to reduce the time and effort for maintenance of the storage unit 15.
[0043]
The water reservoir lid 14 is automatically opened by the action of the pin 16 and the spring 17 when the lid 3 that covers the opening of the pot 2 is opened, so that the user can open the lid 3 to take out the water reservoir 8 and then store the water. The double procedure of opening the cover unit 14 can be executed by a single operation of pressing a cover release button (not shown), and the user's labor can be reduced.
[0044]
In addition, the water storage unit lid 14 is closed until the water storage unit 8 becomes a certain temperature or lower by the operation of the control unit 12, the water storage unit cover fixing rib 18, and the fixing rib opening unit 19, so that the water storage unit lid, for example, immediately after cooking rice. When the temperature of the water storage unit 8 is still high, the water storage unit cover 14 is kept closed, so that the user is prevented from touching the hot water or the heated water storage unit 8 itself, and can be used safely. Note that, when the user intends to open the water storage unit cover 14, the user can remove the water storage unit cover fixing rib 18 to open the water storage unit cover 14.
[0045]
In this embodiment, the water reservoir lid 14 is opened by using the pin 16, the spring 17, the water reservoir lid fixing rib 18, and the fixing rib opening means 19. However, when the lid 3 is opened, the water reservoir lid is opened. 14 is opened, and at the same time, other configurations may be used as long as the safety can be secured and the retaining configuration is adopted.
[0046]
【The invention's effect】
As described above, according to the rice cooker of the present invention, the rice is cooked using the steam for heating the rice and the entry of the hot water into the pot due to the generation of the steam is suppressed. The rice in the upper layer of the pot is not dried, and the gelatinization of the rice is promoted, and the rice cooking performance is improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a rice cooker according to a first embodiment of the present invention. FIG. 2 (a) is a cross-sectional view showing a rice cooker according to a second embodiment of the present invention when a lid is opened, and FIG. FIG. 3 is a cross-sectional view showing a main part of the rice cooker according to the third embodiment of the present invention.
DESCRIPTION OF SYMBOLS 1 Rice cooker main body 2 Pot 3 Lid 4 Pot heating means 5 Steam generation means 8 Water storage part 9 Water storage part heating means 10 Steam paths 11, 13, 14 Water storage part lid (suppression member)
12 control means 15 storage section

Claims (7)

鍋と、前記鍋を加熱する鍋加熱手段と、前記鍋の開口部を覆う蓋と、炊飯加熱用の蒸気を発生させる蒸気発生手段と、前記蒸気を炊飯工程において前記鍋内の上方に供給する蒸気経路とを備え、前記蒸気発生手段から前記蒸気経路への連通部には、蒸気発生手段による熱水の蒸気経路への進入を抑制する抑止部材を設けた炊飯器。A pot, a pot heating means for heating the pot, a lid covering an opening of the pot, a steam generating means for generating steam for heating rice, and supplying the steam upward in the pot in the rice cooking process A rice cooker, comprising: a steam path; and a communication part from the steam generating means to the steam path, provided with a suppressing member for suppressing entry of hot water into the steam path by the steam generating means. 蒸気発生手段は、貯水部とこれを加熱する貯水部加熱手段を有し、抑止部材は、貯水部の開口部を覆い、かつ米が通過しない大きさの穴を有する貯水部蓋とした請求項1に記載の炊飯器。The steam generating means has a water storage part and a water storage part heating means for heating the water storage part. 2. The rice cooker according to 1. 貯水部蓋の穴の上面は、穴に向かって傾斜したすり鉢状としている請求項2に記載の炊飯器。The rice cooker according to claim 2, wherein the upper surface of the hole of the water reservoir lid has a mortar shape inclined toward the hole. 鍋の開口部を覆う蓋を閉めることにより、抑止部材の少なくとも一部が開放される請求項1に記載の炊飯器。The rice cooker according to claim 1, wherein at least a part of the restraining member is opened by closing a lid that covers the opening of the pot. 蒸気発生手段の貯水部を取り外し可能とするとともに、貯水部蓋は貯水部を収納する収納部側に取り付けた請求項2または3に記載の炊飯器。4. The rice cooker according to claim 2, wherein the water storage portion of the steam generating means is detachable, and the water storage portion lid is attached to a storage portion side for storing the water storage portion. 貯水部蓋は、鍋の開口部を覆う蓋の開放により自動開放する請求項5に記載の炊飯器。The rice cooker according to claim 5, wherein the water reservoir lid is automatically opened by opening a lid covering the opening of the pot. 貯水部蓋は、貯水部が一定温度以下となるまでは閉止される請求項4または5のいずれか1項に記載の炊飯器。The rice cooker according to any one of claims 4 and 5, wherein the water storage unit lid is closed until the water storage unit has a predetermined temperature or lower.
JP2003042837A 2003-02-20 2003-02-20 rice cooker Pending JP2004248900A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008104683A (en) * 2006-10-26 2008-05-08 Matsushita Electric Ind Co Ltd rice cooker
US7943337B2 (en) 2003-05-21 2011-05-17 Asahi Kasei Pharma Corporation Method for screening a protease
CN102549337A (en) * 2009-10-08 2012-07-04 夏普株式会社 Steam generation unit and steam cooking device using same
EP2565542A4 (en) * 2010-04-28 2017-09-27 Sharp Kabushiki Kaisha Cooking device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7943337B2 (en) 2003-05-21 2011-05-17 Asahi Kasei Pharma Corporation Method for screening a protease
JP2008104683A (en) * 2006-10-26 2008-05-08 Matsushita Electric Ind Co Ltd rice cooker
CN102549337A (en) * 2009-10-08 2012-07-04 夏普株式会社 Steam generation unit and steam cooking device using same
US8850968B2 (en) 2009-10-08 2014-10-07 Sharp Kabushiki Kaisha Steam generation unit and steam cooking device using same
CN102549337B (en) * 2009-10-08 2015-01-21 夏普株式会社 Steam generating unit and steam cooker using the steam generating unit
EP2565542A4 (en) * 2010-04-28 2017-09-27 Sharp Kabushiki Kaisha Cooking device
US9903597B2 (en) 2010-04-28 2018-02-27 Sharp Kabushiki Kaisha Cooking device including buffer chamber
US11555616B2 (en) 2010-04-28 2023-01-17 Sharp Kabushiki Kaisha Cooking device

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