JP2013070989A - Rice cooker - Google Patents

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JP2013070989A
JP2013070989A JP2011228349A JP2011228349A JP2013070989A JP 2013070989 A JP2013070989 A JP 2013070989A JP 2011228349 A JP2011228349 A JP 2011228349A JP 2011228349 A JP2011228349 A JP 2011228349A JP 2013070989 A JP2013070989 A JP 2013070989A
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rice
rice cooker
pressure
lid
inner lid
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JP5851194B2 (en
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Kazuyoshi Aoto
青戸  一義
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Ketaka Electric Co Ltd
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Ketaka Electric Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a highly safe rice cooker suppressing falling of components and the like in the rice cooker capable of evenly returning Oneba (sticky rice broth) produced in the steps of rice cooking.SOLUTION: The rice cooker 10 includes: a rick cooking pot 20; a rice cooker body 11 for storing the rice cooking pot 20 and having a heating means; a lid body 21; an internal pressure adjusting device PVfor adjusting the internal pressure inside the rice cooking pot 20; and a control device 62 for performing a series of rice cooking steps. The lid body 21 has an inside lid 22 for tightly closing an opening of the rice cooking pot 20; an inner lid 33 on which the inside lid 22 is mounted and which covers the opening of the rice cooker body 11, and an outer lid 58 for covering the upper part of the inner lid 33 and on which an Oneba storage tank 60 is mounted. The inside lid 22 has a recessed portion 22b having a prescribed area and recessed by a prescribed depth, and the recessed portion 22b is formed with a plurality of through-holes 22d. A closing member 23 having a pressure regulating valve 25 and a negative pressure valve 24b is provided on an opening portion 22c of the recessed portion 22b formed on the inside lid 22, so as to tightly close the opening portion 22d.

Description

本発明は鍋内を大気圧以上に加圧して炊飯する圧力型の炊飯器に関し、さらに詳しくは炊飯工程中に発生するおねばを一時貯留し、この貯留したおねばを鍋内に満遍なく戻すことができる構造を有する炊飯器に関する。  The present invention relates to a pressure-type rice cooker that cooks rice by pressurizing the inside of the pan to atmospheric pressure or more, and more specifically, temporarily storing a rice bowl generated during the rice cooking process, and uniformly returning the stored rice bowl into the pan. It is related with the rice cooker which has the structure which can do.

近年、圧力型の炊飯器は、1個又は複数個の圧力弁を設け、炊飯工程の沸騰維持工程において、鍋内を大気圧を超える圧力に加圧すると共に、この圧力弁を所定単位時間単位で間歇的に1ないし複数回開放し、この圧力弁の開放時に鍋内に激しい沸騰現象を発生させて炊飯物を撹拌して炊飯するものが開発・製品化されており、既に一般家庭などでも多く使用されている。  In recent years, a pressure-type rice cooker is provided with one or a plurality of pressure valves, and in the boiling maintenance process of the rice cooking process, the pressure inside the pan is increased to a pressure exceeding the atmospheric pressure, and the pressure valve is set in a predetermined unit time unit. Opened one or more times intermittently, and when the pressure valve is opened, a vigorous boiling phenomenon is generated in the pan and the rice is stirred and cooked. It is used.

このような炊飯器には、炊飯工程中に発生する蒸気を外部へ放出するために蒸気口が設けられており、この蒸気口を通じて炊飯工程中に鍋内の被炊飯物が沸騰した際に吹きこぼれが生じることがある。この吹きこぼれは、粘り気のある糊状の汁であって、この糊状の汁は旨み成分を含んでおり、「おねば」とも呼ばれている。  In such a rice cooker, a steam port is provided in order to release steam generated during the rice cooking process to the outside, and when the cooked food in the pan boils through the steam port during the rice cooking process, it is blown out. May occur. This spillage is a sticky paste-like juice, and this paste-like juice contains a umami component and is also referred to as “onoba”.

このように、炊飯工程中におねばが蒸気とともに外部へ放出されてしまうと、旨み成分も外部へ排出されてしまうため、美味しいご飯が炊きあがらないという問題がある。そこで、近年においては、下記特許文献1に代表されるような、炊飯工程中に外部に放出されるおねばを一時貯留することができるおねば容器を設け、炊飯工程の所定のタイミングでおねば容器内に貯留したおねばを鍋内に戻すような構成を有する炊飯器が開発されている。  In this way, if rice balls are released to the outside together with steam during the rice cooking process, the umami component is also discharged to the outside, so that there is a problem that delicious rice cannot be cooked. Therefore, in recent years, as shown in the following Patent Document 1, a rice container that can temporarily store a rice bowl released outside during the rice cooking process is provided, and the rice cooker is requested at a predetermined timing in the rice cooking process. Rice cookers have been developed that are configured to return the rice balls stored in the container back into the pan.

しかし、下記特許文献1に示す炊飯器は、貯留されたおねばが開閉弁を通して炊きたてのご飯の上に落下するので、戻されるおねばは開閉弁の真下の一箇所に集中されてしまう。そのために、おねばが落下した箇所のご飯は、おねばが多く含まれ水っぽくなり、結果として美味く炊き上がらないという課題がある。  However, in the rice cooker shown in Patent Document 1 below, since the stored rice balls fall onto freshly cooked rice through the on-off valve, the returned rice balls are concentrated at one place directly below the on-off valve. Therefore, there is a problem that the rice where the rice cracker has fallen has a lot of rice balls and becomes watery, and as a result, it cannot be cooked deliciously.

このような課題を解決するために、下記特許文献2には、おねばを分散して戻す構成を有する炊飯器の発明が開示されている。下記特許文献2の炊飯器では、調理器本体の蓋体の内蓋には、所定深さを有する有底の受け皿が取り付けられており、この受け皿には底部上面に形成された受容部と底部に分散して形成された分散孔とを備えている。このような構成とすることで、下記特許文献2の炊飯器によれば、炊飯工程において発生する旨み・美味しさの素であるおねばや蒸気の水滴を受容部で受けた後、複数の分散孔を通じてシャワー状に分散して被調理物の表面のほぼ全域に戻すことができるとされている。  In order to solve such a problem, the following Patent Document 2 discloses an invention of a rice cooker having a configuration in which rice balls are dispersed and returned. In the rice cooker of the following patent document 2, a bottomed saucer having a predetermined depth is attached to the inner lid of the lid of the cooker body, and a receiving part and a bottom part formed on the upper surface of the bottom part are attached to the saucer. And dispersion holes formed in a dispersed manner. By adopting such a configuration, according to the rice cooker of Patent Document 2 below, a plurality of dispersions are received after receiving onions and steam droplets that are elements of umami and deliciousness generated in the rice cooking process. It is said that it can be dispersed in a shower shape through the holes and returned to almost the entire surface of the object to be cooked.

特開平11−244138号公報(段落〔0012〕、図1)  Japanese Patent Laid-Open No. 11-244138 (paragraph [0012], FIG. 1) 特許4684329号公報(段落〔0019〕、図1〜図3)  Japanese Patent No. 4684329 (paragraph [0019], FIGS. 1 to 3)

上記特許文献2に記載の炊飯器では、おねばを分散して戻す受け皿を取り付けることで、効率よくおねばを被調理物の表面のほぼ全域に戻すことが可能である。しかし、この受け皿は、内蓋の鍋側に取り付けられており、しかも、受け皿に形成された取付部を介してネジ等によって内蓋に取り付けられていたり、取り付け支柱を介して着脱が可能なように取り付けられたりしている。そのため、炊飯工程中には圧力変動があるため、炊飯器の使用頻度によってはこのネジ等が落下してしまうおそれがあり、さらには受け皿自体が被調理物の上に落下するおそれもある。また、これらが落下したまま炊飯工程が行われると、炊飯器が故障してしまうおそれもある。  In the rice cooker described in Patent Document 2, it is possible to efficiently return the rice cake to almost the entire area of the surface of the object to be cooked by attaching a saucer that disperses and returns the rice cake. However, this saucer is attached to the pan side of the inner lid, and it can be attached to the inner lid with screws etc. via an attachment part formed on the saucer, or can be attached and detached via an attachment post. It is attached to. Therefore, since there is a pressure fluctuation during the rice cooking process, there is a possibility that the screw or the like may fall depending on the frequency of use of the rice cooker, and there is also a possibility that the saucer itself may fall on the object to be cooked. Moreover, when a rice cooking process is performed with these falling, there exists a possibility that a rice cooker may break down.

さらに、上記特許文献2に記載の炊飯器は、内蓋と受け皿は別体で構成されているため、保温時等に内蓋に付着した結露を除去するために内蓋に設けられた蓋ヒータの熱が伝わり難く、受け皿に多くの結露が付着してしまうおそれがあり、この結露が被調理物上に落ちることで調理物が美味しくなくなるおそれもある。  Furthermore, in the rice cooker described in Patent Document 2, since the inner lid and the saucer are configured separately, the lid heater provided on the inner lid in order to remove condensation that has adhered to the inner lid at the time of heat retention or the like. It is difficult for the heat to be transmitted, and there is a risk that a large amount of condensation will adhere to the saucer, and this condensation may fall on the object to be cooked, which may result in a dish that is not delicious.

本発明は、このような従来技術が抱える課題を解決するためになされたもので、炊飯工程中に発生するおねばを所定の工程中に鍋内に満遍なく戻すことができる構造を有する炊飯器において、部品等の落下を抑制した安全性の高い炊飯器を提供し、さらに、内鍋に付着する結露を効率よく取り除くことができる炊飯器を提供することを目的とする。  This invention was made in order to solve the problem which such a prior art has, and in the rice cooker which has a structure which can return the rice cake which generate | occur | produces during a rice cooking process uniformly in a pan in a predetermined process An object of the present invention is to provide a rice cooker with high safety that suppresses falling of parts and the like, and further to provide a rice cooker that can efficiently remove the dew condensation adhering to the inner pot.

上記発明の目的は、以下の構成によって達成できる。すなわち、本発明の第1の態様の炊飯器は、炊飯物を入れる炊飯鍋と、前記炊飯鍋を収容して該炊飯鍋を加熱する加熱手段を備える炊飯器本体と、前記炊飯器本体を覆うように開閉自在に取り付けられた蓋体と、前記炊飯鍋内の内圧を調整する内圧調整装置と、前記加熱手段及び内圧調整装置を制御して一連の炊飯工程を実行する制御装置とを備えた炊飯器において、前記蓋体は、前記炊飯鍋の開口を密閉する内蓋と、前記内蓋が着脱自在に装着されて前記炊飯器本体の開口を覆う中蓋と、前記中蓋の上部を覆い、前記炊飯工程中に発生したおねばを貯留するおねば貯留タンクが着脱自在に装着されている外蓋とを有し、前記内蓋には、所定面積を有し前記炊飯鍋側に向かって所定深さ窪んだ凹部が設けられ、前記凹部には複数の貫通孔が形成され、前記内蓋に形成された凹部の開口部には、前記内圧調整装置を構成する少なくとも一つの調圧弁と前記鍋内が負圧となったとき前記おねばが通過する負圧弁が設けられた閉塞部材が、前記凹部の開口部を密閉するように、着脱自在に設けられていることを特徴とする。  The object of the invention can be achieved by the following configurations. That is, the rice cooker according to the first aspect of the present invention covers the rice cooker main body provided with the rice cooking pot for containing the cooked rice, the heating means for containing the rice cooking pot and heating the rice cooking pot, and the rice cooker main body. And a lid attached so as to be freely opened and closed, an internal pressure adjusting device for adjusting the internal pressure in the rice cooking pan, and a control device for controlling the heating means and the internal pressure adjusting device to execute a series of rice cooking processes. In the rice cooker, the lid body covers an inner lid that seals the opening of the rice cooker, an inner lid that is detachably mounted to cover the opening of the rice cooker body, and an upper portion of the inner lid. And an outer lid on which a rice ball storage tank for storing rice balls generated during the rice cooking process is detachably mounted, and the inner lid has a predetermined area toward the rice cooking pan side. A recessed portion having a predetermined depth is provided, and a plurality of through holes are formed in the recessed portion. In addition, the opening of the recess formed in the inner lid is provided with at least one pressure regulating valve constituting the internal pressure adjusting device and a negative pressure valve through which the rice bowl passes when the inside of the pan becomes negative pressure. The closing member is detachably provided so as to seal the opening of the recess.

また、第2の態様の炊飯器においては、前記閉塞部材は、前記内蓋に固定手段により固定されていることを特徴とする。  Moreover, in the rice cooker of the 2nd aspect, the said closure member is being fixed to the said inner cover by the fixing means.

また、第3の態様の炊飯器においては、前記閉塞部材の前記中蓋側には、前記中蓋と接する支持部材が少なくとも1つ形成されていることを特徴とする。  The rice cooker according to the third aspect is characterized in that at least one support member in contact with the inner lid is formed on the inner lid side of the closing member.

また、第4の態様の炊飯器においては、前記閉塞部材は、前記中蓋に固定手段により固定されていることを特徴とする。  Moreover, in the rice cooker of the 4th aspect, the said obstruction | occlusion member is being fixed to the said inner lid by the fixing means.

また、第5の態様の炊飯器においては、前記貫通孔は、溝状の導通路により連通されていることを特徴とする。  Moreover, in the rice cooker of the 5th aspect, the said through-hole is connected by the groove-shaped conduction path, It is characterized by the above-mentioned.

また、第6の態様の炊飯器においては、前記中蓋には、蓋ヒーターが設けられていることを特徴とする。  In the rice cooker according to the sixth aspect, the inner lid is provided with a lid heater.

本発明の第1の態様の炊飯器では、炊飯工程中に発生したおねばをおねば貯留タンクに一時貯留しておき、貯留したおねばを炊飯鍋内に戻すとき、おねばが一旦内鍋に形成された凹部に戻され、その後、凹部に形成された複数の貫通孔から炊飯鍋内に戻すことができるので、うまみ成分であるおねばを満遍なく炊飯物に戻すことができ、美味しい炊飯物が得られる。このとき、本発明の第1の態様の炊飯器によれば、内蓋の凹部は、内蓋と一体に成形され、凹部の炊飯鍋側には、従来技術のように取り付け部や取り付けるためのネジ等の部品も設けられていないので、炊飯物にネジ等の部品や受け皿自体が落下するおそれがなく、また、落下した部品等により炊飯器が故障を起すおそれもなくなるので、安全性の高めることができる。また、閉塞部材は、凹部と着脱自在に設けられているので、内蓋の凹部や閉塞部材の洗浄を容易に行うことができる。  In the rice cooker according to the first aspect of the present invention, when the rice cracker generated during the rice cooking process is temporarily stored in a storage tank, and the stored rice basket is returned to the rice cooking pan, the rice cracker is once the inner pot. Can be returned to the rice cooking pot from the plurality of through-holes formed in the recess, so that the rice cake that is an umami ingredient can be returned to the rice cooker evenly. Is obtained. At this time, according to the rice cooker of the 1st aspect of this invention, the recessed part of an inner cover is shape | molded integrally with the inner cover, and it is for attaching a mounting part and attaching like the prior art to the rice cooking pot side of a recessed part. Since there are no parts such as screws, there is no risk that the parts such as screws and the saucer itself will fall on the cooked rice, and there is no risk of the rice cooker failing due to the dropped parts, etc., improving safety be able to. Further, since the closing member is provided so as to be detachable from the recessed portion, the recessed portion of the inner lid and the closing member can be easily cleaned.

また、本発明の第2の態様の炊飯器によれば、内蓋に形成された凹部を閉塞する閉塞部材を、内蓋に固定手段を用いて固定することで、炊飯工程中に炊飯鍋内の内圧が変化しても閉塞部材が外れることを抑制することができる。なお、この固定手段は、公知の構造を使用でき、たとえば、内蓋と閉塞部材にそれぞれ溝と突起を形成しそれらを螺合するようにしてもよく、また、ワンタッチで固定を解除できる機構を有するようにしてもよい。このようにすることで、閉塞部材の着脱が容易となる。  Moreover, according to the rice cooker of the 2nd aspect of this invention, the inside of a rice cooker is cooked during a rice cooking process by fixing the obstruction | occlusion member which obstruct | occludes the recessed part formed in the inner cover to an inner cover using a fixing means. Even if the internal pressure changes, the occlusion member can be prevented from coming off. The fixing means can use a known structure. For example, a groove and a protrusion may be formed in the inner lid and the closing member, and they may be screwed together. You may make it have. By doing in this way, attachment and detachment of a closure member becomes easy.

また、本発明の第3の態様の炊飯器によれば、内蓋の凹部を閉塞する閉塞部材に支持部材が形成されていることで、閉塞部材が、炊飯工程中の炊飯鍋内の内圧の上昇により外れてしまうことを抑制することができる。特に、炊飯器が大型となった場合、内圧がより高くなり吹き出す蒸気の量も多くなるので、より大きな圧力に耐えられるようにする必要があるため、閉塞部材に支持部材を形成し中蓋を押えることで、より大きな圧力に耐えることができるようになる。  Moreover, according to the rice cooker of the 3rd aspect of this invention, since the supporting member is formed in the closure member which obstruct | occludes the recessed part of an inner cover, an obstruction | occlusion member is the internal pressure in the rice cooker in a rice cooking process. It can suppress coming off by the rise. In particular, when the rice cooker becomes large, the internal pressure becomes higher and the amount of steam blown out increases, so it is necessary to withstand higher pressure. By pressing, it will be able to withstand greater pressure.

また、本発明の第4の態様の炊飯器によれば、内蓋に形成された凹部を閉塞する閉塞部材を、中蓋に固定手段を用いて固定することで、炊飯工程中に内圧が上昇したとしても、閉塞部材が中蓋に固定されているので、高い圧力にも耐えることができるようになる。  Moreover, according to the rice cooker of the 4th aspect of this invention, an internal pressure rises during a rice cooking process by fixing the obstruction | occlusion member which obstruct | occludes the recessed part formed in the inner cover to an inner cover using a fixing means. Even so, since the closing member is fixed to the inner lid, it is possible to withstand high pressure.

また、本発明の第5の態様の炊飯器によれば、凹部に戻されたおねばは、導通路を通ることで貫通孔に導くことができ、効率よくおねばを被炊飯物の上に満遍なく戻すことができる。このとき、凹部の中央に向かってやや下方傾斜するように形成されると、おねばが動きやすくなり、貫通孔へと導くことがより効率よくなる。  Moreover, according to the rice cooker of the 5th aspect of this invention, the rice bowl returned to the recessed part can be guide | induced to a through-hole by passing along a conduction path, and efficiently put a rice bowl on a to-be-cooked item. It can be returned evenly. At this time, if it is formed so as to incline slightly downward toward the center of the concave portion, the screw becomes easy to move and it is more efficient to guide it to the through hole.

また、本発明の第6の態様の炊飯器によれば、内蓋と凹部は一体に形成されているので、中蓋に設けられた蓋ヒーターの熱を凹部まで効率よく伝えることができ、内蓋に付着する結露を効率よく除去することができる。  Further, according to the rice cooker of the sixth aspect of the present invention, since the inner lid and the concave portion are integrally formed, the heat of the lid heater provided in the inner lid can be efficiently transmitted to the concave portion, Condensation adhering to the lid can be efficiently removed.

図1は本発明の実施形態に係る圧力型の炊飯器の正面図である。FIG. 1 is a front view of a pressure rice cooker according to an embodiment of the present invention. 図2は図1の炊飯器の化粧カバーを取外した状態の蓋体の平面図である。FIG. 2 is a plan view of the lid body in a state where the decorative cover of the rice cooker of FIG. 1 is removed. 図3は図2の矢印A方向からみた第一の内圧調圧装置の拡大図である。FIG. 3 is an enlarged view of the first internal pressure regulator as viewed from the direction of arrow A in FIG. 図4は図2のIV−IV線に沿って図1の炊飯器を切断した断面図である。4 is a cross-sectional view of the rice cooker of FIG. 1 taken along line IV-IV of FIG. 図5は図4の第一の内圧調圧装置を拡大した断面図である。FIG. 5 is an enlarged cross-sectional view of the first internal pressure regulator in FIG. 図6は図4と同様に図2のVI−VI線で切断した断面図である。6 is a cross-sectional view taken along the line VI-VI in FIG. 図7は図6の第二の内圧調圧装置を拡大した断面図である。FIG. 7 is an enlarged cross-sectional view of the second internal pressure regulator of FIG. 図8は内蓋の斜視図である。FIG. 8 is a perspective view of the inner lid. 図9は内蓋の分解斜視図である。FIG. 9 is an exploded perspective view of the inner lid. 図10Aは図8のXA−XA線で切断した断面図であり、図10Bは図8のXB−XB線で切断した断面図である。10A is a cross-sectional view taken along line XA-XA in FIG. 8, and FIG. 10B is a cross-sectional view taken along line XB-XB in FIG. 図11は制御装置のブロック図である。FIG. 11 is a block diagram of the control device. 図12は複数の炊飯メニューの炊飯フローチャート図である。FIG. 12 is a rice cooking flowchart of a plurality of rice cooking menus. 図13は炊飯メニュー「白米・ふつう」の炊飯工程における鍋内の温度・圧力の変化を示した炊飯特性曲線図である。FIG. 13 is a rice cooking characteristic curve diagram showing changes in temperature and pressure in the pan in the rice cooking process of the rice cooking menu “white rice / normal”.

以下、図面を参照して本発明の実施形態に係る圧力型の炊飯器を説明する。但し、以下に示す実施形態は、本発明の技術思想を具体化するための圧力型の炊飯器を例示するものであって、本発明をこの炊飯器に特定することを意図するものではなく、本発明は特許請求の範囲に含まれるその他の実施形態のものにも等しく適応し得るものである。  Hereinafter, a pressure-type rice cooker according to an embodiment of the present invention will be described with reference to the drawings. However, the embodiment shown below exemplifies a pressure-type rice cooker for embodying the technical idea of the present invention, and is not intended to identify the present invention as this rice cooker. The invention is equally applicable to other embodiments within the scope of the claims.

図1〜図10を参照して、本発明の実施形態に係る圧力型の炊飯器の構造を説明する。なお、図1は本発明の実施形態に係る圧力型の炊飯器の正面図、図2は図1の炊飯器の化粧カバーを取外した状態の蓋体の平面図、図3は図2の矢印A方向からみた第一の内圧調圧装置の拡大図、図4は図2のIV−IV線に沿って図1の炊飯器を切断した断面図、図5は図4の第一の内圧調圧装置を拡大した断面図、図6は図4と同様に図2のVI−VI線で切断した断面図、図7は図6の第二の内圧調圧装置を拡大した断面図、図8は内蓋の斜視図、図9は内蓋の分解図、図10は内蓋の断面図である。  With reference to FIGS. 1-10, the structure of the pressure type rice cooker which concerns on embodiment of this invention is demonstrated. 1 is a front view of a pressure-type rice cooker according to an embodiment of the present invention, FIG. 2 is a plan view of a lid body with the decorative cover of the rice cooker of FIG. 1 removed, and FIG. 3 is an arrow in FIG. FIG. 4 is a cross-sectional view of the rice cooker in FIG. 1 cut along the line IV-IV in FIG. 2, and FIG. 5 is the first internal pressure adjustment in FIG. FIG. 6 is a sectional view taken along line VI-VI in FIG. 2 as in FIG. 4, FIG. 7 is an enlarged sectional view of the second internal pressure regulating device in FIG. Is a perspective view of the inner lid, FIG. 9 is an exploded view of the inner lid, and FIG. 10 is a sectional view of the inner lid.

本発明の実施形態に係る圧力型の炊飯器10は、図1、図4、図6に示すように、米と水とを含む所定量の炊飯物を入れる炊飯鍋(以下、鍋という)20と、この鍋を収容して該鍋を加熱する加熱手段を設けた炊飯器本体(以下、本体という)11と、鍋20の加熱温度を検出する鍋底温度検出手段15と、鍋及び本体の開口を塞ぐ蓋体21と、この蓋体に設けて鍋内の内圧を調整する2組の第一、第二の内圧調整装置PV、PVと、加熱手段及び第一、第二の内圧調整装置PV、PVなどを制御して、一連の炊飯工程を実行する制御装置62(図11参照)とを備えている。加熱手段は底部ヒータ14a、側部ヒータ14b及び蓋ヒータ14cなど及び鍋底温度検出手段はサーミスタ等からなるセンサ15となっている。また、後述する第一、第二の調圧弁は,従来技術でいう「圧力弁」となっている。As shown in FIGS. 1, 4, and 6, a pressure-type rice cooker 10 according to an embodiment of the present invention is a rice cooker (hereinafter referred to as a pan) 20 that contains a predetermined amount of cooked rice containing rice and water. And a rice cooker main body (hereinafter referred to as a main body) 11 provided with heating means for accommodating the pan and heating the pan, a pan bottom temperature detecting means 15 for detecting the heating temperature of the pan 20, and the opening of the pan and the main body , A pair of first and second internal pressure adjusting devices PV 1 and PV 2 for adjusting the internal pressure in the pan provided on the lid, heating means, and first and second internal pressure adjustments such as by controlling the device PV 1, PV 2, and a control unit 62 for executing a series of cooking process (see FIG. 11). The heating means is a sensor 15 including a bottom heater 14a, side heater 14b, lid heater 14c, and the like, and the pan bottom temperature detecting means is a thermistor. Further, the first and second pressure regulating valves described later are “pressure valves” in the prior art.

なお、一連の炊飯工程とは、例えば、図12に示す炊飯メニュー「白米・ふつう」、「白米・あまみ」、「白米・あっさり」、「すしめし」等を含むものである。例えば、炊飯メニュー「白米・ふつう」では、鍋内の米に所定量の水を吸水させる吸水工程、吸水後に鍋内を一気に加熱して沸騰させる立上加熱工程、この沸騰状態を維持して米のデンプンを糊化させて炊き上げる沸騰維持工程、この炊き上ったご飯から余分な水分を除去するとともに糊化をさらに促進させる蒸らし工程などを含むものとなっている。沸騰維持工程では、鍋20内が大気圧を超える圧力に加圧されると共に、第一の内圧調整装置PVの第一の調圧弁25の閉塞ロックを所定の単位時間単位で間歇的に所定回数解除して、鍋20内に激しい沸騰現象、すなわち突沸現象を生じさせて炊飯物を撹拌して炊き上げるようになっている。Note that the series of rice cooking processes includes, for example, the rice cooking menus “white rice / normal”, “white rice / amamami”, “white rice / lightly”, “sushimeshi”, and the like shown in FIG. For example, in the rice cooking menu “white rice / normal”, a water absorption process in which a predetermined amount of water is absorbed by the rice in the pot, a rising heating process in which the pot is heated and boiled at once after water absorption, and this boiling state is maintained and the rice is maintained. It includes a boiling maintaining step in which the starch is gelatinized and cooked, a steaming step in which excess water is removed from the cooked rice and gelatinization is further promoted. The boiling maintain step, the inner bowl 20 is pressurized to a pressure above atmospheric pressure, intermittently predetermined occlusion lock of the first first pressure regulating valve 25 of the pressure regulator PV 1 in a predetermined unit time unit The number of times is canceled, and a violent boiling phenomenon, that is, a bumping phenomenon, is caused in the pan 20 to stir and cook the cooked rice.

以下、この炊飯器の個々の構成を詳述する。  Hereinafter, each structure of this rice cooker is explained in full detail.

本体11は、図4、図6に示すように、上方に所定大きさの開口を有し、深底箱型の外部ケース12と、この外部ケース12内にあって鍋20を支える内部ケース13とを備え、外部ケース12と内部ケース13との間に隙間が形成され、この隙間に制御装置62(図11参照)を構成する制御回路基板19などが配設されている。外部ケース12は、上方の開口部付近が略楕円形状をなしており、この楕円形状の上方部の長手方向の一端部に蓋体21を枢支する枢支部16、他端部に蓋体21が炊飯中に開放されないように係止ロックされる鎖錠爪17及びこの係止ロックを解除して蓋体21を開く解除釦18が設けてある。内部ケース13には、深底の容器からなる鍋20が収容される。この鍋20は、例えばアルミニウムとステンレスとのクラッド材で形成されている。また、内部ケース13には、その底部13a及び側部13bにそれぞれ底部ヒータ14a及び側部ヒータ14bが設けられ、底部13aに鍋底温度を検知するサーミスタ等からなる鍋底温度センサ15が設けられている。底部ヒータ14aには環状に巻装した電磁誘導コイルが使用されている。  As shown in FIGS. 4 and 6, the main body 11 has an opening of a predetermined size on the upper side, a deep box-type outer case 12, and an inner case 13 that supports the pot 20 in the outer case 12. And a gap is formed between the outer case 12 and the inner case 13, and the control circuit board 19 constituting the control device 62 (see FIG. 11) is disposed in the gap. The outer case 12 has a substantially elliptical shape in the vicinity of the upper opening, the pivotal support portion 16 that pivotally supports the lid 21 at one end in the longitudinal direction of the upper portion of the elliptical shape, and the lid 21 at the other end. Is provided with a locking claw 17 that is locked and locked so as not to be opened during cooking, and a release button 18 that releases the locking and opens the lid 21. The inner case 13 accommodates a pot 20 made of a deep bottom container. The pan 20 is made of, for example, a clad material made of aluminum and stainless steel. The inner case 13 is provided with a bottom heater 14a and a side heater 14b on the bottom 13a and side 13b, respectively, and a pan bottom temperature sensor 15 comprising a thermistor for detecting the pan bottom temperature is provided on the bottom 13a. . An electromagnetic induction coil wound in an annular shape is used for the bottom heater 14a.

蓋体21は、図2、図4、図6に示すように、鍋20の開口部を密閉する内蓋22と、この内蓋が着脱自在に装着されて本体11の開口部を覆う中蓋33と、この中蓋の上部を覆い表示パネルなどが設けられておねば貯留タンク60が着脱自在に装着される外蓋58等とを有している。外蓋58は、化粧蓋となっている。この蓋体21は、中蓋33の一側に本体11の枢支部16に枢支されるヒンジ機構34、35、他側に本体11の鎖錠爪17に係止ロックする蓋ロック手段36が設けてある。  2, 4, and 6, the lid 21 includes an inner lid 22 that seals the opening of the pan 20, and an inner lid that is detachably attached to cover the opening of the main body 11. 33, and an outer lid 58 on which the storage tank 60 is detachably mounted if a display panel or the like is provided so as to cover the upper portion of the inner lid. The outer lid 58 is a decorative lid. The lid 21 has hinge mechanisms 34 and 35 pivotally supported by the pivot 16 of the main body 11 on one side of the inner lid 33, and lid locking means 36 for locking and locking to the locking claw 17 of the main body 11 on the other side. It is provided.

内蓋22は、図4、図6、図8〜図10に示すように、鍋20の開口部を密閉する大きさであって、略中央部分に所定面積を有し鍋20側に向かって所定深さ窪んだ凹部22bが設けられた円盤状体からなり、その外周縁に気密パッキン22aが装着されている。この凹部22bには、複数の貫通孔22dが形成されており、これら貫通孔22dは環状の溝からなる導通路22eによりいくつかに分かれて連通されている。また、内蓋22に設けられた凹部22bの開口部22cは、着脱自在に設けられた閉塞部材23に覆われている。この閉塞部材23の外周縁には閉塞パッキン23aが設けられており、内蓋22と密閉されるようになる。また、凹部22bは、凹部22bの中心に向かってやや下方に傾斜して形成されている。  As shown in FIGS. 4, 6, and 8 to 10, the inner lid 22 has a size that seals the opening of the pan 20, and has a predetermined area in a substantially central portion toward the pan 20 side. It consists of a disk-like body provided with a recessed portion 22b that is recessed by a predetermined depth, and an airtight packing 22a is mounted on the outer periphery thereof. A plurality of through holes 22d are formed in the recess 22b, and these through holes 22d are divided into several parts and communicated with each other by a conduction path 22e formed of an annular groove. The opening 22c of the recess 22b provided in the inner lid 22 is covered with a closing member 23 provided detachably. A closing packing 23 a is provided on the outer peripheral edge of the closing member 23 so as to be sealed with the inner lid 22. Further, the recess 22b is formed to be inclined slightly downward toward the center of the recess 22b.

また、閉塞部材23は、内蓋22と固定手段63により固定されている。この固定手段63は、内蓋22に形成された一方が開口し、屋根状の係合部63aを有する係合溝部63bと、閉塞部材23に形成された係合突起63cとで構成され、それぞれが少なくとも2箇所に形成されており、閉塞部材23を回転させることで、係合突起63cを係合溝部63bにスライドさせ、係合突起63cが係合部63aに当接して係合されるような構造としている。このとき、係合溝部63bは、徐々に狭まるように構成されているため、係合突起63bが強固に係合することができるようになる。なお、この固定手段63は、これに限らず、公知のものを使用することができる。  Further, the closing member 23 is fixed by the inner lid 22 and the fixing means 63. One of the fixing means 63 formed on the inner lid 22 is open and includes an engaging groove 63b having a roof-like engaging portion 63a and an engaging protrusion 63c formed on the closing member 23. Are formed in at least two locations, and by rotating the closing member 23, the engagement protrusion 63c is slid into the engagement groove 63b, and the engagement protrusion 63c is brought into contact with and engaged with the engagement portion 63a. It has a simple structure. At this time, since the engaging groove 63b is configured to gradually narrow, the engaging protrusion 63b can be firmly engaged. The fixing means 63 is not limited to this, and a known one can be used.

さらに、この閉塞部材23は、上面の略中央部付近に、第一、第二の調圧弁25、29、鍋内の圧力が異常に上がったときに開放する安全弁24a及び、鍋内が負圧になったときに開成しておねば貯留タンク60に貯留されたおねばを鍋内へ戻す負圧弁24bが配設されている。これらの安全弁24a及び負圧弁24bは、既存のものを使用しこれらは既に公知であるので説明を省略する。また、第一、第二の調圧弁の構造などは、第一、第二の内圧調整装置PV、PVに関連して後述する。In addition, the closing member 23 includes a first and second pressure regulating valves 25 and 29, a safety valve 24a that is opened when the pressure in the pan abnormally increases, and a negative pressure in the pan near the substantially central portion of the top surface. A negative pressure valve 24b is provided for returning the rice balls stored in the storage tank 60 to the inside of the pan if they are opened at the time. As these safety valve 24a and negative pressure valve 24b, existing ones are used, and since these are already known, description thereof will be omitted. The structure of the first and second pressure regulating valves will be described later in relation to the first and second internal pressure adjusting devices PV 1 and PV 2 .

また、閉塞部材23の上面には、複数個の突起が形成されている。この突起は、閉塞部材23と後述する中蓋33と接するように形成されており、炊飯工程中に鍋20内の圧力が高くなったとき、この内圧により閉塞部材23が内蓋22から外れないようにするために、閉塞部材23と中蓋33との間を支える支持部材23bとなっている。  A plurality of protrusions are formed on the upper surface of the closing member 23. This protrusion is formed so as to be in contact with the closing member 23 and an inner lid 33 which will be described later. When the pressure in the pan 20 becomes high during the rice cooking process, the closing member 23 does not come off from the inner lid 22 due to the internal pressure. In order to do so, the supporting member 23b is supported between the closing member 23 and the inner lid 33.

中蓋33は、図2、図4、図6に示すように、本体11の開口部を塞ぐ大きさの楕円形状体からなり、機械的強度が高いフレームなどで補強されている。この中蓋33は、その略中央部に、第一調圧弁閉塞ロック機構38、第二調圧弁開放機構52及びおねば貯留タンク60が装着される装着孔37が設けてある。なお、この中蓋33には、結露を防止する蓋ヒータ14c及び蒸気温度を検知する蒸気温度センサ(図示省略)などが取り付けられている。  As shown in FIGS. 2, 4, and 6, the inner lid 33 is formed of an elliptical body having a size that closes the opening of the main body 11 and is reinforced with a frame having high mechanical strength. The inner lid 33 is provided with a mounting hole 37 in which the first pressure regulating valve closing lock mechanism 38, the second pressure regulating valve opening mechanism 52, and the pocket storage tank 60 are mounted at a substantially central portion thereof. The inner lid 33 is provided with a lid heater 14c for preventing condensation and a steam temperature sensor (not shown) for detecting the steam temperature.

次に、図2〜図10を参照して、第一、第二の内圧調整装置PV、PVを説明する。まず、主に図5を参照して第一の内圧調整装置PVを説明する。なお、図5は第一の内圧調整装置PVを示し、図5Aは第一の調整弁の非閉塞ロック状態、図5Bは閉塞ロックの解除状態を示している。Next, the first and second internal pressure adjustment devices PV 1 and PV 2 will be described with reference to FIGS. First, the first internal pressure adjusting device PV 1 will be described mainly with reference to FIG. Note that FIG. 5 shows a first pressure regulator PV 1, Figure 5A is unobstructed locked state of the first control valve, FIG. 5B shows the released state of the closing lock.

この第一の内圧調整装置PVは、図3〜図5に示すように、鍋20内を大気圧を超える所定の設定圧力値に保持する閉塞保持圧力を有する第一の調圧弁25と、この第一の調圧弁の弁口を閉塞し、その閉塞が鍋内の内圧の上昇によって閉塞保持圧力を超えても開成しないように、この閉塞状態を保持ロックする第一調圧弁閉塞ロック機構38とを有している。第一の調圧弁25は内蓋22に設けられた閉塞部材23に、第一調圧弁閉塞ロック機構38は中蓋33に設けた取付け基板33Aにそれぞれ設けられている。第一の調圧弁25は、所定の口径26a’の弁口26aが形成された弁座26と、この弁口26aの口径26a’を塞ぐように弁座26上に載置される金属製の調圧ボール28と、この調圧ボール28が外へ転がり落ちないように規制するカバー27とを有し、このカバー27に排気孔27aが形成されている。この第一の調圧弁25は、鍋20内を大気圧を超える所定の圧力値に保持する閉塞保持圧力1.05気圧(atm)に設定されている。この設定は、弁口の大きさ及び調圧ボールの重さで設定する。例えば、第一の調圧弁25は、口径26a’が4.6mm、調圧ボール28の直径を12.7mm及びその重量が8.505g(比重7.93)にして、閉塞保持圧力が1.05気圧(atm)になっている。この閉塞保持圧力1.05気圧(atm)は、非閉塞ロック状態であるが、調圧ボールを押さえた閉塞ロック状態では、押さえ力65gをプラスして、ロック状態の閉塞保持圧力は1.44気圧(atm)になっている。As shown in FIGS. 3 to 5, the first internal pressure adjusting device PV 1 includes a first pressure regulating valve 25 having a closing holding pressure for holding the inside of the pan 20 at a predetermined set pressure value exceeding atmospheric pressure, A first pressure regulating valve closing lock mechanism 38 that holds and locks this closed state so that the valve opening of the first pressure regulating valve is closed and does not open even if the closing exceeds the closing holding pressure due to an increase in the internal pressure in the pan. And have. The first pressure regulating valve 25 is provided on the closing member 23 provided on the inner lid 22, and the first pressure regulating valve closing lock mechanism 38 is provided on the mounting substrate 33 </ b> A provided on the inner lid 33. The first pressure regulating valve 25 is made of a metal that is placed on the valve seat 26 so as to close the valve seat 26 in which a valve port 26a having a predetermined diameter 26a ′ is formed and the diameter 26a ′ of the valve port 26a. The pressure adjusting ball 28 and a cover 27 for restricting the pressure adjusting ball 28 from rolling off are provided, and an exhaust hole 27 a is formed in the cover 27. The first pressure regulating valve 25 is set to a closing holding pressure of 1.05 atm (atm) for holding the inside of the pan 20 at a predetermined pressure value exceeding the atmospheric pressure. This setting is made by the size of the valve opening and the weight of the pressure adjusting ball. For example, the first pressure regulating valve 25 has a diameter 26a ′ of 4.6 mm, a diameter of the pressure regulating ball 28 of 12.7 mm, and a weight of 8.505 g (specific gravity 7.93). It is 05 atm (atm). This blockage holding pressure of 1.05 atm (atm) is in the non-blocking lock state, but in the blockage lock state in which the pressure adjusting ball is pressed, a pressing force of 65 g is added and the blockage holding pressure in the locked state is 1.44. Atmospheric pressure (atm).

なお、この第一の調圧弁25の設定閉塞保持圧力は、大気圧を超える圧力値であれば任意の値でよいが、大気圧(1.0気圧)に近いと第一調圧弁閉塞ロック機構38で第一の調圧弁25の閉塞ロックが解除されたときに鍋20内の圧力が過度に下がり過ぎて鍋内の温度が低下し炊飯物が冷えることがあるので、大気圧(1.0気圧)から所定圧力値を超えた圧力、例えば1.05気圧(atm)以上1.075気圧の範囲に設定するのが好ましい。  The set closing holding pressure of the first pressure regulating valve 25 may be an arbitrary value as long as it is a pressure value exceeding the atmospheric pressure, but if close to the atmospheric pressure (1.0 atm), the first pressure regulating valve closing locking mechanism. Since the pressure in the pan 20 is excessively lowered when the closing lock of the first pressure regulating valve 25 is released at 38, the temperature in the pan may be lowered and the cooked rice may be cooled. The pressure is preferably set within a range of 1.05 atm (atm) to 1.075 atm.

また、排気孔27aは、金属製の調圧ボール28が鍋20内の圧力により押上げられて弁口26aの口径26a’が開成したときに、鍋20内の蒸気及びおねばを排出するものとなっている。  In addition, the exhaust hole 27a discharges steam and a bowl in the pan 20 when the metal pressure adjusting ball 28 is pushed up by the pressure in the pan 20 and the aperture 26a 'of the valve port 26a is opened. It has become.

また、第一調圧弁閉塞ロック機構38は、図5に示すように、第一の調圧弁25の閉塞状態をロック及びこの閉塞ロック状態を解除するロック・解除作動部材39と、このロック・解除作動部材を作動させる駆動装置46とを有している。ロック・解除作動部材39は、一端部(下方端)40bが調圧ボール28を所定の押圧力で押圧してこの調圧ボールの持ち上がりを阻止(ロック)する押圧棒40と、この押圧棒を押圧降下させる揺動アーム42とを有している。この揺動アーム42は、略中央部が固定枠45に支軸43で枢支されて揺動自在となっており、その一端部42aが押圧棒40の他端部(上方端)40aに当接するようにすると共に、他端部42bがスライド枠体50に当接するようにしてバネ体44で付勢されている。このバネ体44は、支軸43に装着して、揺動アーム42を図5の時計方向に回動するように付勢している。押圧棒40は、このバネ体44の付勢力で揺動アーム42を回動させて押圧される。すなわち、ロック状態の閉塞力はバネ体によって設定される。  Further, as shown in FIG. 5, the first pressure regulating valve closing lock mechanism 38 locks the closed state of the first pressure regulating valve 25 and releases the locked / unlocked operation member 39, and this lock / release member. And a driving device 46 for operating the operating member. The lock / release operation member 39 includes a pressing rod 40 whose one end portion (lower end) 40b presses the pressure adjusting ball 28 with a predetermined pressing force to prevent (lock) the pressure adjusting ball from lifting, and the pressing rod. And a swing arm 42 for pressing and lowering. The swing arm 42 has a substantially central portion pivotally supported by a support shaft 43 on a fixed frame 45 and can swing freely. One end 42 a of the swing arm 42 contacts the other end (upper end) 40 a of the pressing rod 40. While being in contact with each other, the other end portion 42 b is urged by the spring body 44 so as to be in contact with the slide frame body 50. The spring body 44 is attached to the support shaft 43 and urges the swing arm 42 to rotate in the clockwise direction of FIG. The pressing rod 40 is pressed by rotating the swing arm 42 by the urging force of the spring body 44. That is, the locking force in the locked state is set by the spring body.

また、押圧棒40は、固定枠45内にあって、押圧棒40の下方端部40b部分が、この押圧棒40が持ち上がるように付勢する弾性体からなる密閉パッキン41が固定枠45に固定されている。この密閉パッキン41は、所定直径の弾性を有する円盤体からなり、外周縁に取付け部を有して、この取付け部で中蓋に固定されている。密閉パッキン41は、円盤体の中央に突出部が設けられて、この突出部に押圧棒40の下方端部40b部が固定されている。すなわち、密閉パッキン41は、その弾性を利用して、図5に示す取付け状態で、押圧棒40を上方へ押上げると共に、下方向へも押動されることができ、かつ中蓋33の開口を密閉する働きをするものとなっている。なお、この実施形態では、ロック状態の閉塞力は、揺動アーム42を回動させるバネ体によって設定するようにしたが、この構成に限定されることなく、調圧ボールを所定の押圧力で押さ付けるのであれば、任意の機構を用いてもよい。  Further, the pressing rod 40 is in the fixed frame 45, and the sealing packing 41 made of an elastic body that urges the lower end portion 40 b of the pressing rod 40 so that the pressing rod 40 is lifted is fixed to the fixing frame 45. Has been. The hermetic packing 41 is made of a disk body having a predetermined diameter of elasticity, has an attachment portion on the outer peripheral edge, and is fixed to the inner lid by this attachment portion. The sealing packing 41 is provided with a protruding portion at the center of the disk body, and the lower end portion 40b of the pressing rod 40 is fixed to the protruding portion. That is, the sealing packing 41 can be pushed upward and pushed downward in the attached state shown in FIG. 5 by utilizing its elasticity, and the opening of the inner lid 33 can be pushed. It serves as a seal. In this embodiment, the closing force in the locked state is set by a spring body that rotates the swing arm 42. However, the present invention is not limited to this configuration, and the pressure adjusting ball can be applied with a predetermined pressing force. Any mechanism may be used as long as it is pressed.

駆動装置46は、図3、図5に示すように、電磁コイルが巻回されたシリンダ47と、このシリンダ内にあって電磁コイルの励磁により引込められるプランジャ48とを有し、プランジャ48の先端部に、このプランジャを所定長さ引き出す伸張コイルバネ49が装着されている。この伸張コイルバネ49は、その先端がスライド枠体50に固定されて、このスライド枠体50は取付け基板33A上にスライド移動自在に固定されている。スライド枠体50は、取付け基板33A上をスライド移動自在なスライド台50aと、このスライド台の一側面にあって揺動アーム42の下方端42bに当接して押動する押動部50bとを有している。この下方端42bと押動部50bとは、押動部50bの両端、すなわち、図3の前方と奥方とに一対の対向する腕突起を設けて、これらの腕突起間に弾性湾曲可能な細金属線51を懸架し、この細金属線51に揺動アーム42の下方端42bが引っ掛かるようにして連結されている。この連結は、一種の緩衝機構或いは緩衝手段となっている。  As shown in FIGS. 3 and 5, the drive device 46 includes a cylinder 47 around which an electromagnetic coil is wound, and a plunger 48 that is in the cylinder and is retracted by excitation of the electromagnetic coil. An extension coil spring 49 for pulling out the plunger for a predetermined length is attached to the distal end portion. The end of the extension coil spring 49 is fixed to the slide frame body 50, and the slide frame body 50 is slidably fixed on the mounting substrate 33A. The slide frame 50 includes a slide base 50a that is slidable on the mounting substrate 33A, and a pressing portion 50b that is on one side of the slide base and presses against the lower end 42b of the swing arm 42. Have. The lower end 42b and the pushing portion 50b are formed by providing a pair of opposing arm projections at both ends of the pushing portion 50b, that is, the front and the back in FIG. 3, and elastically bending between these arm projections. A metal wire 51 is suspended, and the thin metal wire 51 is connected so that the lower end 42b of the swing arm 42 is hooked. This connection is a kind of buffer mechanism or buffer means.

この構成によると、プランジャ48が電磁コイルの励磁にシリンダ内に引込められたときに、揺動アーム42の下方端42bが細金属線51に当接して、この下方端42bがシリンダ方向へ引っ張られる。この引っ張りの際に、細金属線51が弾性湾曲可能になっているので、揺動アーム42との間に無理な力が加わらず若干の余裕ができるので、駆動装置46とロック・解除作動部材39との連結・調整が容易になる。すなわち、この作動時に、揺動アーム42は、支軸43を支点に揺動(シーソー)動作されて、駆動装置46の進退動作の許容動作範囲以上のストロークが確保でき押圧棒40で押圧する調圧ボール28との余裕を取ることが可能となり、駆動装置46の取付け位置にも余裕が取れる。なお、緩衝機構は、弾性湾曲可能な細金属線51を用いたもので構成したが、他の緩衝機構ないし手段で構成してもよい。  According to this configuration, when the plunger 48 is retracted into the cylinder for exciting the electromagnetic coil, the lower end 42b of the swing arm 42 contacts the thin metal wire 51, and the lower end 42b is pulled in the cylinder direction. It is done. Since the thin metal wire 51 can be elastically bent during this pulling, an excessive force is not applied between the swing arm 42 and a slight allowance is provided, so that the drive device 46 and the lock / release operation member The connection / adjustment with 39 becomes easy. In other words, during this operation, the swing arm 42 is swung (seesaw) with the support shaft 43 as a fulcrum, so that a stroke exceeding the allowable operation range of the forward / backward movement of the drive device 46 can be secured and pressed by the pressing rod 40. It is possible to provide a margin with the pressure ball 28 and allow a margin for the mounting position of the driving device 46. In addition, although the buffer mechanism was comprised using the thin metal wire 51 which can be bent elastically, you may comprise with another buffer mechanism thru | or means.

この第一の内圧調整装置PVは、制御装置によって制御されて、以下の(a)〜(c)の作用をする。
(a)第一調圧弁非閉塞ロック状態
この非閉塞ロック状態では、駆動装置46の電磁コイルが無励磁状態にある。図5Aに示すように、シリンダ47が伸張コイルバネ49の伸長力により、スライド台50aをロック・解除作動部材39の揺動アーム42の下方端42bに当接すると共に、バネ体44のバネ力に打ち勝って、この揺動アーム42の上方42aで押圧棒40を下方へ押し下げることがない。その結果、押圧棒40は、密閉パッキン41で上方へ持上げられて、第一の調圧弁25は調圧ボール28の自重により弁口26a’が閉塞される。弁口26a’が調圧ボール28で閉塞されると、炊飯中は、鍋内の圧力が閉塞力、すなわち、設定値1.05気圧以下になることがない。
(b)第一調圧弁閉塞ロック状態
この状態は、駆動装置46の電磁コイルが励磁される。図5Bに示すように、シリンダ47が伸張コイルバネ49の伸長力に抗して引かれると共に、揺動アーム42がバネ体44の付勢力により図5Bの時計方向へ回動する。揺動アーム42の回動により、その上方端42aで押圧棒40を下方へ押下げて、調圧ボール28に当接させて押圧し、この調圧ボールを弁口26a’に押し付けて、閉塞状態を保持、すなわち、ロックする。その結果、第一の調圧弁25は、設定値(1.05気圧)を超えても開成されることなく鍋の内圧が上昇する。なお、鍋内の圧力が上昇しても、第二の調圧弁29が閉成されているので、この内圧は第二の調圧弁29の閉塞保持圧力まで上昇する。
(c)第一調圧弁閉塞ロック状態の解除
駆動装置46の電磁コイルへの励磁が無くなると、シリンダ47が伸張コイルバネ49の伸長力により、その先端部が揺動アーム42の下方端42bに当接して、バネ体44により揺動アーム42が図5の反時計方向へ回動する。これにより、押圧棒40が密閉パッキン41の復元力により持上げられて、調圧ボール28から離れて、上記(a)の非閉塞ロック状態となる。その結果、鍋内の圧力が設定値1.05気圧より高いと、この内圧により第一の調圧弁25が開成される。また、鍋内の圧力が設定値1.05気圧を超えないと、閉塞状態が保持される。このロック解除は、沸騰維持工程において、炊飯メニューに応じて、所定の回数実施される。なお、この第一の内圧調整装置PVは、駆動装置46と第一調圧弁閉塞ロック機構38とが緩衝機構を介して連結されているので、駆動装置と第一調圧弁閉塞ロック機構との連結・調節が容易になるとともに、第一の調圧弁の開成ないし閉成をスムーズに行える。
The first pressure regulator PV 1 is controlled by the control device, the effect of the following (a) ~ (c).
(A) First pressure regulating valve non-blocking locked state In this non-blocking locked state, the electromagnetic coil of the drive device 46 is in a non-excited state. As shown in FIG. 5A, the cylinder 47 abuts the slide table 50 a against the lower end 42 b of the swing arm 42 of the lock / release operation member 39 and overcomes the spring force of the spring body 44 by the extension force of the extension coil spring 49. Thus, the pressing rod 40 is not pushed downward by the upper portion 42a of the swing arm 42. As a result, the pressing rod 40 is lifted upward by the sealing packing 41, and the valve opening 26 a ′ of the first pressure regulating valve 25 is closed by the weight of the pressure regulating ball 28. If valve opening 26a 'is obstruct | occluded with the pressure regulation ball | bowl 28, the pressure in a pan will not become the obstruction | occlusion force, ie, set value 1.05 atm or less, during rice cooking.
(B) First pressure regulating valve closed lock state In this state, the electromagnetic coil of the drive device 46 is excited. As shown in FIG. 5B, the cylinder 47 is pulled against the extension force of the extension coil spring 49, and the swing arm 42 is rotated in the clockwise direction of FIG. 5B by the biasing force of the spring body 44. By rotating the swing arm 42, the upper end 42a of the swinging arm 42 pushes the pressing bar 40 downward, presses it against the pressure adjusting ball 28, presses the pressure adjusting ball against the valve port 26a ', and closes Hold state, ie lock. As a result, the internal pressure of the pan rises without being opened even if the first pressure regulating valve 25 exceeds the set value (1.05 atm). Even if the pressure in the pan rises, the second pressure regulating valve 29 is closed, so this internal pressure rises to the closing holding pressure of the second pressure regulating valve 29.
(C) Release of the first pressure regulating valve closed lock state When the excitation of the electromagnetic coil of the driving device 46 is lost, the cylinder 47 is applied to the lower end 42b of the swing arm 42 by the extension force of the extension coil spring 49. In contact therewith, the swinging arm 42 is rotated counterclockwise in FIG. As a result, the pressing rod 40 is lifted by the restoring force of the sealing packing 41 and is separated from the pressure adjusting ball 28 to be in the non-blocking locked state of (a). As a result, when the pressure in the pan is higher than the set value 1.05 atm, the first pressure regulating valve 25 is opened by this internal pressure. If the pressure in the pan does not exceed the set value of 1.05 atm, the closed state is maintained. This unlocking is performed a predetermined number of times according to the rice cooking menu in the boiling maintenance step. Incidentally, the first pressure regulator PV 1, since the drive unit 46 and the first pressure regulating valve closure lock mechanism 38 is connected through a buffer mechanism, the driving device and the first pressure regulating valve closed locking mechanism Connection and adjustment are facilitated, and the first pressure regulating valve can be opened or closed smoothly.

主に図7を参照して、第二の内圧調整装置PVを説明する。なお、図7は第二の内圧調整装置PVを示し、図7Aは第二の調整弁が強制的に開放された状態を示し、図7Bは第二の調整弁が閉成された状態を示している。Referring mainly to FIG. 7, illustrating a second pressure regulator PV 2. Incidentally, FIG. 7 shows a second pressure regulator PV 2, FIG. 7A shows a state where the second control valve is forcibly opened, Figure 7B is a state in which the second adjustment valve is closed Show.

この第二の内圧調整装置PVは、第一の調圧弁より高い閉塞保持圧力を有する第二の調圧弁29と、この第二の調圧弁を強制的に開放させる第二調圧弁開放機構52とを有している。第二の調圧弁29は内蓋22に設けられた閉塞部材23に、第二調圧弁開放機構52は中蓋33に設けた取付け基板33Aに、それぞれ設けられている。第二の調圧弁29は、所定の口径30a’の弁口30aが形成された弁座30と、この弁口30aの口径30a’を塞ぐように弁座30上に載置される金属製の調圧ボール32と、この調圧ボール32の移動を規制することで弁座30上に調圧ボール32を保持するカバー31とを有し、カバー31に排気孔31aが形成されている。この第二の調圧弁29の閉塞保持圧力は、弁口の大きさ及び調圧ボールの重さで設定する。例えば、調圧ボールの直径を19.84mm、調圧ボールの重量を32.445g(比重7.93)及び弁座の弁口(直径)を3.7mmにして、閉塞力1.3気圧(atm)にする。この閉塞保持圧力は、第一の調圧弁の閉塞力1.05気圧より高くなっている。第二の調圧弁29の閉塞保持圧力は、1.3気圧(atm)に限定されるものでなく、それ以上、例えば、2.0気圧にしてもよい。The second internal pressure adjusting device PV2 includes a second pressure regulating valve 29 having a higher closing holding pressure than the first pressure regulating valve, and a second pressure regulating valve opening mechanism 52 that forcibly opens the second pressure regulating valve. And have. The second pressure regulating valve 29 is provided on the closing member 23 provided on the inner lid 22, and the second pressure regulating valve opening mechanism 52 is provided on the mounting substrate 33 </ b> A provided on the inner lid 33. The second pressure regulating valve 29 includes a valve seat 30 in which a valve opening 30a having a predetermined diameter 30a ′ is formed, and a metal made on the valve seat 30 so as to close the diameter 30a ′ of the valve opening 30a. The pressure adjusting ball 32 has a cover 31 that holds the pressure adjusting ball 32 on the valve seat 30 by restricting the movement of the pressure adjusting ball 32, and an exhaust hole 31 a is formed in the cover 31. The closing holding pressure of the second pressure regulating valve 29 is set by the size of the valve opening and the weight of the pressure regulating ball. For example, the diameter of the pressure adjusting ball is 19.84 mm, the weight of the pressure adjusting ball is 32.445 g (specific gravity 7.93), the valve port (diameter) of the valve seat is 3.7 mm, and the occlusion force is 1.3 atm ( atm). This occlusion holding pressure is higher than the occlusion force 1.05 atm of the first pressure regulating valve. The occlusion holding pressure of the second pressure regulating valve 29 is not limited to 1.3 atm (atm), and may be, for example, 2.0 atm.

なお、この第二の調圧弁29の閉塞保持圧力は、第一の調圧弁25の閉塞保持圧力1.05気圧より高い値、例えば.1.2気圧(atm)以上に設定されているが、第二の調圧弁29の閉塞保持圧力は、第一の調圧弁25の閉塞保持圧力を超える圧力値であれば任意の値でよい。しかし、第一の調圧弁25の閉塞保持圧力1.05〜1.075気圧に近いと、両者の圧力差が少なくなり、第一の調圧弁が開放されたときに、鍋内に発生する突沸現象が大きくならず、そのために炊飯物の撹拌が不足するので、この圧力値より高い値、例えば、1.2気圧以上2.0気圧の範囲が好ましい。  Note that the closing pressure of the second pressure regulating valve 29 is higher than the closing pressure 1.05 atm of the first pressure regulating valve 25, for example,. Although it is set to 1.2 atmospheres (atm) or more, the closing pressure of the second pressure regulating valve 29 may be any value as long as the pressure value exceeds the closing pressure of the first pressure regulating valve 25. However, when the first pressure regulating valve 25 is close to the closed holding pressure of 1.05 to 1.075 atm, the pressure difference between the two decreases, and the bumping that occurs in the pan when the first pressure regulating valve is opened. Since the phenomenon does not increase and stirring of the cooked rice is insufficient, a value higher than this pressure value, for example, a range of 1.2 atmospheres to 2.0 atmospheres is preferable.

また、排気孔31aは、第二の調圧弁29が強制的に開放されたときに、鍋20内の蒸気を排出するものとなっている。また、第二調圧弁開放機構52は、電磁コイルが巻回されたシリンダ53と、このシリンダ内から電磁コイルの励磁により入出し調圧ボール32を移動させるプランジャ54と、プランジャの先端が固定されたスライド枠体56と、シリンダの一端部とスライド枠体との間にあってプランジャ54の先端を所定長さ突出させる伸張バネ体55とを有し、スライド枠体56は、取付け基板33A上にスライド移動自在に固定されている。スライド枠体56は、取付け基板33A上をスライド移動するスライド台56aと、このスライド台の上方にあってプランジャの先端が固定される固定片56b及びこの固定片から前方へ突出して調圧ボールに先端部が当接する突出棒56cとを有している。突出棒56cは、その先端が密閉パッキン57に固定されている。密閉パッキン57は、所定直径の弾性を有する円盤体からなり、外周縁に取付け部を有して、この取付け部でカバー体に固定されている。密閉パッキン57は、円盤体の中央に突出部が設けられて、この突出部の一方端に突出棒56cの先端が固定され他端が調圧ボールに当接するようになっている。すなわち、密閉パッキン57は、弾性を利用して、取付け状態で水平方向へ動くことができると共に、カバーの開口を密閉する働きをするものとなっている。  Further, the exhaust hole 31a discharges the steam in the pan 20 when the second pressure regulating valve 29 is forcibly opened. The second pressure regulating valve opening mechanism 52 includes a cylinder 53 around which an electromagnetic coil is wound, a plunger 54 that moves the pressure adjusting ball 32 in and out of the cylinder by excitation of the electromagnetic coil, and a tip of the plunger. The slide frame 56 and an extension spring body 55 between the one end of the cylinder and the slide frame and projecting the tip of the plunger 54 by a predetermined length. The slide frame 56 slides on the mounting substrate 33A. It is fixed so that it can move freely. The slide frame 56 includes a slide base 56a that slides on the mounting substrate 33A, a fixed piece 56b that is located above the slide base and to which the tip of the plunger is fixed, and protrudes forward from the fixed piece to form a pressure adjusting ball. And a protruding rod 56c with which the tip end abuts. The tip of the protruding rod 56 c is fixed to the sealing packing 57. The hermetic packing 57 is made of a disk body having a predetermined diameter of elasticity, and has an attachment portion on the outer peripheral edge, and is fixed to the cover body by this attachment portion. The sealing packing 57 is provided with a projecting portion at the center of the disk body, the tip of the projecting rod 56c is fixed to one end of the projecting portion, and the other end is in contact with the pressure adjusting ball. In other words, the sealing packing 57 can move in the horizontal direction in the attached state by using elasticity, and functions to seal the opening of the cover.

この第二の内圧調整装置PVは、制御装置62により制御される。すなわち、制御装置62からの指令に基づき、電磁コイルが励磁される。この励磁により、プランジャ54がシリンダ53に引込められる。これにより、調圧ボール32はその自重により転動して弁口30a’を閉塞する。また、この状態から、電磁コイルが無励磁になると、シリンダ53が伸張バネ体55の伸長力により、前方へ引き出されて調圧ボール32が押動されて調圧弁が開成する。The second internal pressure adjusting device PV 2 is controlled by the control device 62. That is, the electromagnetic coil is excited based on a command from the control device 62. The plunger 54 is retracted into the cylinder 53 by this excitation. As a result, the pressure adjusting ball 32 rolls by its own weight and closes the valve port 30a ′. Further, from this state, when the electromagnetic coil is de-energized, the cylinder 53 is pulled forward by the extension force of the extension spring body 55 and the pressure adjustment ball 32 is pushed to open the pressure adjustment valve.

この実施形態では、第一、第二の調圧弁は、調圧ボールの重さで圧力調整するようにしたが、この方法に限らず、弁口の口径の大きさをそれぞれ変える方法とすれば、ボールの重さは同じでも、異なる圧力の設定が可能となる。例えば重さ11.0gで、直径14.0のボールを、調圧ボール28,32に使用した場合に弁口の口径4〜5mmで圧力1.05気圧前後が得られ、さらに弁口の口径を、2〜3.0mmとすると圧力1.30気圧前後を得ることが出来る。  In this embodiment, the first and second pressure regulating valves are pressure-adjusted by the weight of the pressure regulating ball. However, the present invention is not limited to this method. Even if the weight of the ball is the same, different pressures can be set. For example, when a ball having a weight of 11.0 g and a diameter of 14.0 is used for the pressure adjusting balls 28 and 32, a pressure of around 1.05 atm is obtained with a valve diameter of 4 to 5 mm, and the diameter of the valve opening is further increased. Is 2 to 3.0 mm, a pressure around 1.30 atm can be obtained.

外蓋58は、中蓋33を覆い化粧カバーで構成されている。この外蓋58には、表示操作部59が設けられると共に、おねば貯留タンク60が着脱自在に装着される。表示操作部59は、図1に示すように、各種の炊飯選択コース及び時刻等が表示される表示パネルと、この表示パネルの周辺に複数個のスイッチ操作釦が設けられている。これらのスイッチ操作釦は、炊飯器を作動させる炊飯/スタート釦(キーともいう、以下同じ)、炊飯予約をする炊飯予約釦、炊飯等の設定を取消す取消/保温釦、炊飯する米を選択するお米選択釦、炊飯メニューを選択するメニュー選択釦、コースを選択するコース釦、及び表示パネルに表示されたメニュー等を選択・決定するシフトキーなどとなっている。これらの釦(キー)は、押し釦式のスイッチを構成する操作釦等であって、これらの釦(キー)を押圧することにより、各種操作がなされるようになっている。  The outer lid 58 covers the inner lid 33 and is configured by a decorative cover. The outer lid 58 is provided with a display operation unit 59, and a storage tank 60 is detachably mounted. As shown in FIG. 1, the display operation unit 59 is provided with a display panel on which various rice cooking selection courses and times are displayed, and a plurality of switch operation buttons around the display panel. These switch operation buttons select a rice cooking / start button (also referred to as a key, hereinafter the same) for operating the rice cooker, a rice cooking reservation button for making a rice cooking reservation, a cancel / heat keeping button for canceling the setting of rice cooking, etc. These include a rice selection button, a menu selection button for selecting a rice cooking menu, a course button for selecting a course, and a shift key for selecting and determining a menu displayed on the display panel. These buttons (keys) are operation buttons or the like constituting a push button type switch, and various operations are performed by pressing these buttons (keys).

また、貯留タンク60は、図4、図6に示すように、その内部におねばを一時貯留する空間60aと、蒸気を外部へ逃す蒸気口60cと、おねば戻し弁60dと、中空筒状接続部60bとを有し、この中空筒状接続部60bが装着孔37に嵌入装着されるようになっている。なお、おねばは粘り気のある糊状の汁であって、この糊状の汁は旨み成分を含んでおり、このおねばをそのまま外へ排出されてしまうとご飯が美味しく炊きあがらない。そこで、このおねばを貯留する貯留タンク60を設けて、この貯留タンクにおねばを一時貯留しておき、鍋20内の加熱が終了して鍋20内が負圧になったときにおねばを鍋内に戻すことで美味しく炊きあげることができる。このおねばを戻す工程の詳細については後述する。  As shown in FIGS. 4 and 6, the storage tank 60 has a space 60a for temporarily storing therein a steam, a steam port 60c for releasing steam to the outside, a spring return valve 60d, and a hollow cylindrical shape. The hollow cylindrical connecting portion 60b is fitted into the mounting hole 37 and attached thereto. In addition, rice balls are sticky paste-like juice, and this paste-like juice contains a umami component, and if this rice cake is discharged as it is, rice will not be cooked deliciously. Therefore, a storage tank 60 for storing the rice bowl is provided, and the rice basket is temporarily stored in the storage tank. When the heating in the pan 20 is finished and the inside of the pan 20 becomes negative pressure, the storage tank 60 is stored. It can be cooked deliciously by returning to the pan. The details of the process of returning this request will be described later.

次に、図11を参照して、制御装置62を説明する。なお、図11は制御装置を構成するブロック図である。  Next, the control device 62 will be described with reference to FIG. In addition, FIG. 11 is a block diagram which comprises a control apparatus.

制御装置62は、図11に示すように、種々の演算処理を行うCPU、各種データの記憶を行うROMおよびRAMからなる記憶手段、選択された炊飯メニューを検出する炊飯メニュー検出回路、第一、第二の調圧弁の開閉時間を設定する弁開閉タイマー、第一、第二の調圧弁の開閉回数をカウントするカウンタと、炊飯量を判定する量判定手段と、加熱手段を制御する加熱制御回路、表示パネルに表示される表示画面を制御する表示パネル制御回路、第一、第二の調圧弁を制御する調圧弁制御手段などを備えている。記憶手段には、各種の炊飯メニューに対応した炊飯プログラムが記憶されている。この炊飯プログラムは、各炊飯メニューに共通で、吸水工程、立上加熱工程、沸騰維持工程、追い炊き工程及び蒸らし工程などとなっている。この制御装置62は、入力側に、炊飯スタートキー、炊飯メニュー設定キー、鍋底温度センサ及び蒸気温度センサなど、出力側にヒータ(加熱手段)、表示パネル。第一、第二の調圧弁を制御する第一、第二の内圧調整装置PV、PVなどが接続されている。なお、ヒータは、鍋底ヒータ、側面ヒータおよび蓋ヒータとなっている。As shown in FIG. 11, the control device 62 includes a CPU that performs various arithmetic processes, a storage unit that includes a ROM and a RAM that store various data, a rice cooking menu detection circuit that detects a selected rice cooking menu, A valve opening / closing timer for setting the opening / closing time of the second pressure regulating valve, a counter for counting the number of opening / closing times of the first and second pressure regulating valves, an amount determining means for determining the amount of rice cooking, and a heating control circuit for controlling the heating means A display panel control circuit for controlling a display screen displayed on the display panel, a pressure regulating valve control means for controlling the first and second pressure regulating valves, and the like. The storage means stores rice cooking programs corresponding to various rice cooking menus. This rice cooking program is common to each rice cooking menu, and includes a water absorption process, a start-up heating process, a boiling maintenance process, a cooking process, and a steaming process. This control device 62 includes a rice cooking start key, a rice cooking menu setting key, a pan bottom temperature sensor, and a steam temperature sensor on the input side, a heater (heating means) on the output side, and a display panel. First and second internal pressure adjusting devices PV 1 and PV 1 for controlling the first and second pressure regulating valves are connected. The heater is a pan bottom heater, a side heater, and a lid heater.

ここで、図12、図13を参照して、各炊飯工程を説明する。なお、図12は複数の炊飯メニューの炊飯フローチャート図、図13は炊飯メニュー「白米・ふつう」の炊飯工程における鍋内の温度・圧力の変化を示した炊飯特性曲線図である。  Here, with reference to FIG. 12, FIG. 13, each rice cooking process is demonstrated. In addition, FIG. 12 is the rice cooking flowchart figure of a some rice cooking menu, FIG. 13 is the rice cooking characteristic curve figure which showed the change of the temperature and pressure in the pan in the rice cooking process of the rice cooking menu "white rice and normal".

各種の炊飯メニューは、例えば、白米・ふつう、白米・あまみ、白米・あっさり、すしめしが表示パネルに表示される。ユーザーがこの表示パネルをみて炊飯メニュー設定キー61bを操作し所望の炊飯メニューを選定する。  In the various rice cooking menus, for example, white rice / usually, white rice / amiami, white rice / lightly, and sushi are displayed on the display panel. The user views the display panel and operates the rice cooking menu setting key 61b to select a desired rice cooking menu.

最初に、白米・ふつうを選択した場合の炊飯工程を説明する。まず、鍋20に所定量の水と白米とを入れ、この鍋を本体11の内部ケース13内にセットした(ステップS101)後に、炊飯メニュー「白米・ふつう」が選択されると(S102〜S103)、制御装置62は、一連の炊飯工程を実行する。この制御装置62は、吸水工程の開始前に第一の調圧弁25を「閉」にしてから、吸水工程を実行する。吸水工程では、第一の調圧弁25はその自重により弁口が閉じられるが、第一調圧弁閉塞ロック機構38は作動していない。また、第二の調圧弁29も「閉」にされる(S104)。そして、吸水工程では、加熱手段(底部ヒータ14a)への通電を行って鍋20内の温度を所定の吸水温度(60℃)にして所定の吸水時間を掛けて米に所定量の水を吸水させる(S105)。このとき、鍋内の圧力は略大気圧になっている。なお、吸水工程で鍋内の圧力を1.05気圧まで上昇させて吸水させてもよい。  First, the rice cooking process when white rice / normal is selected will be described. First, when a predetermined amount of water and white rice are put into the pan 20 and the pan is set in the inner case 13 of the main body 11 (step S101), the rice cooking menu “white rice / normal” is selected (S102 to S103). ), The control device 62 executes a series of rice cooking steps. The control device 62 executes the water absorption process after the first pressure regulating valve 25 is “closed” before the start of the water absorption process. In the water absorption process, the first pressure regulating valve 25 is closed by its own weight, but the first pressure regulating valve closing lock mechanism 38 is not activated. The second pressure regulating valve 29 is also “closed” (S104). In the water absorption step, the heating means (bottom heater 14a) is energized, the temperature in the pan 20 is set to a predetermined water absorption temperature (60 ° C.), and a predetermined amount of water is taken to absorb a predetermined amount of water. (S105). At this time, the pressure in the pan is approximately atmospheric pressure. In the water absorption step, the pressure in the pan may be increased to 1.05 atm to absorb water.

吸水工程が終了した後に、立上加熱工程へ移行する。この立上加熱工程では、第一調圧弁閉塞ロック機構38を作動させて第一の調圧弁25を閉塞ロック(S106)し、加熱手段(14a、14b)へフルパワー通電を行って鍋20内を加圧状態下において沸騰状態にする(S107)。蓋体21に設置した蒸気温度センサで蒸気温度を検知し、この蒸気温度が所定温度(75℃)に達したときに次の沸騰維持工程へ移行させる。なお、この立上加熱工程では、図13に示すように、鍋20内の圧力が1.3気圧に向かって加圧される。  After the water absorption process is completed, the process proceeds to the rising heating process. In this start-up heating process, the first pressure regulating valve closing lock mechanism 38 is operated to lock the first pressure regulating valve 25 (S106), and the heating means (14a, 14b) is energized at full power so that the inside of the pan 20 is closed. Is brought into a boiling state under a pressurized state (S107). The steam temperature is detected by a steam temperature sensor installed on the lid body 21, and when the steam temperature reaches a predetermined temperature (75 ° C.), the process proceeds to the next boiling maintenance step. In addition, in this start-up heating process, as shown in FIG. 13, the pressure in the pan 20 is pressurized toward 1.3 atmospheres.

沸騰維持工程(S108)では、所定の沸騰維持電力で鍋内を沸騰状態に維持する。この沸騰維持工程では、沸騰を検出した後、所定時間、例えば20秒経過した後に、制御装置62は、駆動装置46を介して第一調圧弁閉塞ロック機構38を作動させて、第一調圧弁25の閉塞ロックを所定の単位時間で複数(3〜5回以上)回間歇的に解除し、この解除・ロック操作を繰り返させる(S109)。この解除・ロック操作は、鍋内の圧力の高低によって時間を異ならせておこない、低圧に比べ高圧の際の時間が長くなるように設定される。この設定は、第一調圧弁の閉塞ロックが解除される低圧の時間をt1、閉塞ロックが実行される高圧の時間をt2としたとき、t2はt1の約4〜7倍とすると好ましい。このようにすることで、閉塞ロックの実行時に披炊飯物に熱量を蓄積し、閉塞ロックの解除時に高圧と低圧の差分の圧力を一時に放出することができる。このとき、第一の調圧弁の弁口の径が大きいほど短時間に圧力の放出を集中できて大きな撹拌現象を起こすことができる。そこで、低圧の時間t2で放出する内圧のエネルギーに対して高圧の時間t1で内圧のエネルギーを蓄積することが必要となる。このとき、放出される圧力のエネルギー量は第一の調圧弁の弁口径と高圧と低圧の差と閉塞ロック解除時間で決定され、蓄積された圧力のエネルギー量は沸騰維持工程での電力と閉塞ロック時間の積で決定することができる。すなわち、放出される圧力のエネルギーと蓄積された圧力のエネルギーとの関係が、放出される圧力のエネルギー≦蓄積された圧力のエネルギーとなるように閉塞ロックの作動時間と閉塞ロックの解除時間の設定が行われ、放出される圧力のエネルギー>蓄積された圧力のエネルギーとなれば徐々に閉塞ロック解除時の撹拌力が弱まっていくこととなる。なお、本実施形態では、例えば高圧を52秒、低圧を8秒で行う。  In the boiling maintenance step (S108), the inside of the pan is maintained in a boiling state with a predetermined boiling maintenance power. In this boiling maintenance step, after a predetermined time, for example, 20 seconds elapses after the boiling is detected, the control device 62 operates the first pressure regulating valve closing lock mechanism 38 via the drive device 46, and the first pressure regulating valve. The 25 locks are intermittently released a plurality of times (3 to 5 times or more) in a predetermined unit time, and this release / lock operation is repeated (S109). This releasing / locking operation is performed at different times depending on the pressure in the pan, and is set so that the time at high pressure is longer than that at low pressure. This setting is preferably such that t2 is about 4 to 7 times t1, where t1 is the low pressure time during which the blockage lock of the first pressure regulating valve is released and t2 is the high pressure time during which the blockage lock is executed. By doing in this way, calorie | heat amount can be accumulate | stored in cooked rice at the time of execution of obstruction | occlusion lock, and the pressure of the difference of high pressure and low pressure can be discharge | released at once at the time of cancellation | release of obstruction | occlusion lock. At this time, as the diameter of the valve opening of the first pressure regulating valve is larger, the pressure release can be concentrated in a shorter time, and a larger stirring phenomenon can be caused. Therefore, it is necessary to store the internal pressure energy at the high pressure time t1 with respect to the internal pressure energy released at the low pressure time t2. At this time, the energy amount of the released pressure is determined by the valve diameter of the first pressure regulating valve, the difference between the high pressure and the low pressure, and the closing lock release time, and the accumulated pressure energy amount is the electric power and blocking in the boiling maintenance process. It can be determined by the product of the lock times. That is, the setting time of the closing lock and the release time of the closing lock are set so that the relationship between the energy of the released pressure and the energy of the accumulated pressure is the energy of the released pressure ≦ the energy of the accumulated pressure. If the energy of the released pressure is greater than the energy of the accumulated pressure, the stirring force at the time of releasing the blocking lock gradually weakens. In this embodiment, for example, the high pressure is performed for 52 seconds and the low pressure is performed for 8 seconds.

このロック・解除毎に、第一の調圧弁25が間歇的に開放されて、開放時に鍋20内の状態が加圧状態から1.05気圧近傍まで一気に降下して鍋内に圧力変動が起こり、この圧力変動が間歇的に複数回に亘って繰り返される(図13参照)。この間歇的な調圧弁25の開放により、鍋20内の圧力が大きく変動し、その度毎に鍋内に激しい沸騰現象、いわゆる突沸現象が生じて大量の泡が発生すると、同時に鍋内の中央側の米粒が鍋内の側方へ或いは逆方向への移動を繰り返して、鍋内の米粒が効率よく撹拌される。この撹拌により、米粒全体に十分な熱が加わり、加熱ムラがなくなる。また、圧力を変動させることにより鍋20内が負圧となったとき、おねば貯留タンク60に貯留されていたおねばは、おねば戻し弁60d及び内蓋22の閉塞部材23に配設された負圧弁24bを通り内蓋22の凹部22bへと戻される。そして、この凹部22bには、複数個の貫通孔22dが形成されているので、これらの貫通孔22dからおねばが鍋20内に落下することで、おねばを米粒上に満遍なく広げることができる。なお、凹部22bに形成された貫通孔22dは、環状の溝で形成された導通路22eにより連通されていることで、おねばを効率よく貫通孔22d全体に行き渡らせることができる(図4、図6参照)。さらに、この撹拌により、おねばも効率よく混ざり込み、米粒の周囲がこのおねばによってコーティングされる。おねばには、ご飯の旨み成分が多く含まれているので、炊き上がったご飯はこのおねばでコーティングされてより美味しいものになる。  Each time this lock / release is performed, the first pressure regulating valve 25 is intermittently opened, and when opened, the state in the pan 20 drops from the pressurized state to near 1.05 atm, causing pressure fluctuations in the pan. This pressure fluctuation is intermittently repeated a plurality of times (see FIG. 13). Due to the intermittent opening of the pressure regulating valve 25, the pressure in the pan 20 fluctuates greatly, and every time a severe boiling phenomenon, so-called bumping phenomenon occurs in the pan, a large amount of foam is generated. The rice grains on the side repeatedly move sideways in the pan or in the opposite direction, so that the rice grains in the pan are efficiently stirred. By this stirring, sufficient heat is applied to the whole rice grains, and uneven heating is eliminated. Further, when the pressure in the pan 20 becomes negative, the rice cake that has been stored in the rice storage tank 60 is disposed on the rice return valve 60d and the closing member 23 of the inner lid 22. The negative pressure valve 24b is then returned to the recess 22b of the inner lid 22. And since this through-hole 22d is formed in this recessed part 22b, a rice ball falls in the pan 20 from these through-holes 22d, and can spread a rice ball uniformly on a rice grain. . The through-hole 22d formed in the recess 22b is communicated by a conduction path 22e formed by an annular groove, so that it is possible to efficiently spread the screw through the entire through-hole 22d (FIG. 4, (See FIG. 6). Further, the stirring mixes the rice balls efficiently and the rice grains are coated around the rice balls. Rice balls contain a lot of umami ingredients, so the cooked rice is coated with this rice cake and becomes more delicious.

また、第一の調圧弁25が開放されても、図13に示すように、鍋20内の圧力は、第一の調圧弁25の閉塞保持圧力、すなわち1.05気圧以下に降下することがないので、この内圧降下に伴う鍋内温度の低下が最小限、すなわち、鍋20内の温度は(101.1〜101.4℃)〜(103.0〜107.0℃)範囲の変動となるので、炊飯物の一部が冷えて炊き上がったご飯に炊飯ムラが発生することがない。  Further, even if the first pressure regulating valve 25 is opened, as shown in FIG. 13, the pressure in the pan 20 may drop to the closing holding pressure of the first pressure regulating valve 25, that is, 1.05 atm or less. Therefore, the temperature drop in the pan due to this internal pressure drop is minimal, that is, the temperature in the pan 20 varies between (101.1 to 101.4 ° C.) and (103.0 to 107.0 ° C.). Therefore, rice cooking unevenness does not occur in the rice that has been cooked by cooling a part of the cooked rice.

この沸騰維持工程において、第一の調圧弁25が複数回に亘り開放された後、所定時間の間は、第一の調圧弁25を閉塞ロックした状態を維持したままでこの沸騰維持工程を継続し、その後は、第一の調圧弁25の閉塞ロックを解除して、鍋内の圧力を設定値1.05気圧に維持して残りの沸騰維持工程を実行する(S110)。そして、沸騰維持工程の後半では、鍋底温度センサ15が所定の鍋底温度(130℃)を検出すると、制御装置62は加熱手段への通電を停止してむらし1工程へ移行する(S111)。この蒸らし1工程が終了した後に、第二の調圧弁29を開放して(S112)追い炊き工程(S113)へ移行すると共に、加熱手段で再加熱する。この再加熱が終了すると、蒸らし2工程へ移行(S114)して、この炊飯メニューの一連の炊飯工程を終了する。  In this boiling maintaining step, after the first pressure regulating valve 25 is opened several times, the boiling maintaining step is continued while maintaining the closed state of the first pressure regulating valve 25 for a predetermined time. Thereafter, the closing lock of the first pressure regulating valve 25 is released, the pressure in the pan is maintained at the set value of 1.05 atm, and the remaining boiling maintaining step is executed (S110). Then, in the latter half of the boiling maintenance process, when the pan bottom temperature sensor 15 detects a predetermined pan bottom temperature (130 ° C.), the control device 62 stops energizing the heating means and shifts to the unevenness one step (S111). After this one steaming process is completed, the second pressure regulating valve 29 is opened (S112), and the process proceeds to the additional cooking process (S113) and reheated by the heating means. When this reheating is completed, the process proceeds to the steaming 2 process (S114), and a series of rice cooking processes of this rice cooking menu is completed.

以上より、この白米・ふつうの炊飯は、沸騰維持工程において、第一の調圧弁が開成されても、この第一の調圧弁が大気圧を超える所定の圧力に保持する閉塞保持圧力を有しているので、鍋内の内圧は、この閉塞保持圧力の圧力値より下方へ降下することがない。したがって、従来技術の炊飯器が大気圧近傍まで低下することによる課題を解消して、炊飯することができる。  From the above, this white rice / normal rice cooker has a clogging holding pressure that holds the first pressure regulating valve at a predetermined pressure exceeding the atmospheric pressure even if the first pressure regulating valve is opened in the boiling maintaining step. Therefore, the internal pressure in the pan does not drop below the pressure value of the closing holding pressure. Therefore, the problem by the rice cooker of a prior art falling to atmospheric pressure vicinity can be eliminated, and rice can be cooked.

なお、炊飯工程が終了したのち、鍋20内のご飯を保温して保存する場合、鍋20内に結露が発生し、この結露がご飯に落下することで、ご飯が水っぽくなる等の不具合が起こる。そのため、保温中は、各ヒータ14a〜14cを間歇的に作動させることで、この結露を効率よく蒸発させている。このとき、本実施形態の炊飯器10では、中蓋33に設けられた蓋ヒータ14cにより、内蓋22に付着した結露を蒸発させる際、内蓋22とこの内蓋22に形成された凹部22bは一体に形成されているので、蓋ヒータ14cの熱を凹部22bの全体に伝えることができるので、内蓋22に付着した結露を効率よく蒸発させ除去することができる。  In addition, after the rice cooking process is completed, when the rice in the pan 20 is kept warm and stored, dew condensation occurs in the pan 20, and the condensation falls on the rice, causing problems such as the rice becoming watery. . For this reason, during the heat insulation, the condensation is efficiently evaporated by intermittently operating the heaters 14a to 14c. At this time, in the rice cooker 10 of the present embodiment, when the condensation attached to the inner lid 22 is evaporated by the lid heater 14c provided on the inner lid 33, the inner lid 22 and the concave portion 22b formed on the inner lid 22 are used. Are integrally formed, the heat of the lid heater 14c can be transmitted to the entire recess 22b, so that the dew condensation adhering to the inner lid 22 can be efficiently evaporated and removed.

本発明の炊飯器によれば、うまみ成分であるおねばを満遍なく炊飯物に戻すことができ、美味しいご飯を炊き上げることができる。さらに、おねばを鍋内に戻す機構が、内蓋に凹部として一体に形成されているので、従来のような、受け皿をネジ等を用いて固定していないので、ネジ等の脱落等のおそれがなく、安全性の高い炊飯器を提供することができるようになる。  According to the rice cooker of the present invention, rice balls that are umami ingredients can be returned to the cooked rice evenly, and delicious rice can be cooked. In addition, since the mechanism for returning the rice cake into the pan is integrally formed as a recess in the inner lid, the saucer is not fixed with screws, etc., as in the past, so there is a risk of screws falling off etc. It becomes possible to provide a highly safe rice cooker.

なお、上記実施例では、内蓋の凹部の開口部を覆う閉塞部材23を内蓋22に設けるようにしたが、これに限らず、中蓋に設けるようにしてもよい。すなわち、上記実施例で内蓋に設けた固定手段における係合溝部の構造を、中蓋に設けるようにし、この係合溝部に閉塞部材の係合突起を係合するようにする。このとき、閉塞部材に設けられた閉塞パッキンが内蓋の凹部の開口部が密閉されるようにするのは実施例と同様である。このような構成としても、上記実施例の効果を奏することができるようになる。また、閉塞部材を中蓋に設けることで、閉塞部材が圧力を受けたとしても、中蓋で支えることができるようになるので実施例のような支持部材を特別に形成する必要がなくなる。  In the above-described embodiment, the closing member 23 that covers the opening of the concave portion of the inner lid is provided on the inner lid 22. However, the present invention is not limited to this, and the closing member 23 may be provided on the inner lid. That is, the structure of the engagement groove portion in the fixing means provided on the inner lid in the above embodiment is provided on the inner lid, and the engagement protrusion of the closing member is engaged with this engagement groove portion. At this time, the closing packing provided on the closing member seals the opening of the recess of the inner lid as in the embodiment. Even with such a configuration, the effects of the above-described embodiments can be achieved. Further, by providing the closing member on the inner lid, even if the closing member receives pressure, it can be supported by the inner lid, so that it is not necessary to specially form a support member as in the embodiment.

また、実施例では、内蓋の凹部に形成された貫通孔は、環状の溝の導通路によって連通されているが、環状に限らず、例えば、おねばが落下する位置を基準として放射状に広がるようにしてもよい。  Further, in the embodiment, the through holes formed in the concave portion of the inner lid are communicated by the conduction path of the annular groove. However, the through hole is not limited to the annular shape, and for example, spreads radially on the basis of the position where the rice bowl falls. You may do it.

10 炊飯器
11 炊飯器本体
12 外部ケース
13 内部ケース
14a、14b ヒータ
14c 蓋ヒータ
15 鍋底温度センサ(鍋底温度検出手段)
17 鎖錠爪
18 解除釦
21 蓋体
22 内蓋
23 閉塞部材
24a 安全弁
24b 負圧弁
25 第一の調圧弁
26 弁座
26a 弁口
28 調圧ボール
29 第二の調圧弁
30 調圧ボール
30a’ 弁口
33 中蓋
38 第一調圧弁閉塞ロック機構
39 ロック・解除作動部材
42 揺動アーム
46 駆動装置
50a スライド台
51 細金属線(緩衝装置)
56 スライド枠体
58 外蓋
59 制御パネル
60 おねば貯留タンク
60d おねば戻し弁
62 制御装置
PV 第一の内圧調整装置
PV 第二の内圧調整装置
DESCRIPTION OF SYMBOLS 10 Rice cooker 11 Rice cooker main body 12 External case 13 Internal case 14a, 14b Heater 14c Cover heater 15 Pan bottom temperature sensor (pan bottom temperature detection means)
17 Locking claw 18 Release button 21 Lid 22 Inner lid 23 Closure member 24a Safety valve 24b Negative pressure valve 25 First pressure regulating valve 26 Valve seat 26a Valve port 28 Pressure regulating ball 29 Second pressure regulating valve 30 Pressure regulating ball 30a 'valve Mouth 33 Inner lid 38 First pressure regulating valve closing lock mechanism 39 Lock / release operation member 42 Swing arm 46 Drive device 50a Slide base 51 Thin metal wire (buffer device)
56 Slide frame 58 Outer cover 59 Control panel 60 Stick storage tank 60d Stick return valve 62 Control device PV 1 First internal pressure adjustment device PV 2 Second internal pressure adjustment device

Claims (6)

炊飯物を入れる炊飯鍋と、前記炊飯鍋を収容して該炊飯鍋を加熱する加熱手段を備える炊飯器本体と、前記炊飯器本体を覆うように開閉自在に取り付けられた蓋体と、前記炊飯鍋内の内圧を調整する内圧調整装置と、前記加熱手段及び内圧調整装置を制御して一連の炊飯工程を実行する制御装置とを備えた炊飯器において、
前記蓋体は、前記炊飯鍋の開口を密閉する内蓋と、前記内蓋が着脱自在に装着されて前記炊飯器本体の開口を覆う中蓋と、前記中蓋の上部を覆い、前記炊飯工程中に発生したおねばを貯留するおねば貯留タンクが着脱自在に装着されている外蓋とを有し、
前記内蓋には、所定面積を有し前記炊飯鍋側に向かって所定深さ窪んだ凹部が設けられ、前記凹部には複数の貫通孔が形成され、
前記内蓋に形成された凹部の開口部には、前記内圧調整装置を構成する少なくとも一つの調圧弁と前記鍋内が負圧となったとき前記おねばが通過する負圧弁が設けられた閉塞部材が、前記凹部の開口部を密閉するように、着脱自在に設けられていることを特徴とする炊飯器。
A rice cooker for containing rice cooker, a rice cooker main body comprising heating means for containing the rice cooker and heating the rice cooker, a lid attached to be openable and closable so as to cover the rice cooker main body, and the rice cooker In a rice cooker comprising an internal pressure adjusting device for adjusting the internal pressure in the pan, and a control device for controlling the heating means and the internal pressure adjusting device to execute a series of rice cooking steps,
The lid includes an inner lid that seals the opening of the rice cooker, an inner lid that is detachably mounted to cover the opening of the rice cooker body, and covers an upper portion of the inner lid, the rice cooking step An outer lid that is removably mounted with a tomb storage tank for storing the tomb generated therein;
The inner lid is provided with a recess having a predetermined area and recessed by a predetermined depth toward the rice cooker side, and a plurality of through holes are formed in the recess.
The opening of the recess formed in the inner lid is provided with at least one pressure regulating valve constituting the internal pressure adjusting device and a negative pressure valve through which the rice cake passes when the inside of the pan becomes negative pressure. A rice cooker, wherein the member is detachably provided so as to seal the opening of the recess.
前記閉塞部材は、前記内蓋に固定手段により固定されていることを特徴とする請求項1に記載の炊飯器。  The rice cooker according to claim 1, wherein the closing member is fixed to the inner lid by a fixing means. 前記閉塞部材の前記中蓋側には、前記中蓋と接する支持部材が少なくとも1つ形成されていることを特徴とする請求項1又は2に記載の炊飯器。  The rice cooker according to claim 1 or 2, wherein at least one support member in contact with the inner lid is formed on the inner lid side of the closing member. 前記閉塞部材は、前記中蓋に固定手段により固定されていることを特徴とする請求項1に記載の炊飯器。  The rice cooker according to claim 1, wherein the closing member is fixed to the inner lid by a fixing means. 前記貫通孔は、溝状の導通路により連通されていることを特徴とする請求項1に記載の炊飯器。  The rice cooker according to claim 1, wherein the through holes are communicated with each other through a groove-shaped conduction path. 前記中蓋には、蓋ヒーターが設けられていることを特徴とする請求項1に記載の炊飯器。  The rice cooker according to claim 1, wherein the inner lid is provided with a lid heater.
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JP2015097573A (en) * 2013-11-18 2015-05-28 象印マホービン株式会社 Cooking device
JP2015211806A (en) * 2014-05-07 2015-11-26 象印マホービン株式会社 Ball valve and pressure cooker
CN105919411A (en) * 2016-07-15 2016-09-07 山东多星电器有限公司 Sealed electric cooker
CN110353497A (en) * 2018-04-09 2019-10-22 佛山市顺德区美的电热电器制造有限公司 Cooking apparatus and its control method

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JP4684329B2 (en) * 2008-12-26 2011-05-18 三洋電機株式会社 Electric rice cooker and rice cooking method

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JP2009285231A (en) * 2008-05-30 2009-12-10 Hitachi Appliances Inc Rice cooker
JP4684329B2 (en) * 2008-12-26 2011-05-18 三洋電機株式会社 Electric rice cooker and rice cooking method

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JP2015097573A (en) * 2013-11-18 2015-05-28 象印マホービン株式会社 Cooking device
JP2015211806A (en) * 2014-05-07 2015-11-26 象印マホービン株式会社 Ball valve and pressure cooker
CN105919411A (en) * 2016-07-15 2016-09-07 山东多星电器有限公司 Sealed electric cooker
CN110353497A (en) * 2018-04-09 2019-10-22 佛山市顺德区美的电热电器制造有限公司 Cooking apparatus and its control method
CN110353497B (en) * 2018-04-09 2021-10-26 佛山市顺德区美的电热电器制造有限公司 Cooking appliance and control method thereof

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