JP7181649B2 - rice cooker - Google Patents

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JP7181649B2
JP7181649B2 JP2021188823A JP2021188823A JP7181649B2 JP 7181649 B2 JP7181649 B2 JP 7181649B2 JP 2021188823 A JP2021188823 A JP 2021188823A JP 2021188823 A JP2021188823 A JP 2021188823A JP 7181649 B2 JP7181649 B2 JP 7181649B2
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pot
rice
inner pot
outer pot
water
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JP2022010420A (en
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玄 寺尾
明人 唐澤
征一 石津
文明 茂木
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Balmuda Inc
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
    • A47J27/086—Pressure-cookers; Lids or locking devices specially adapted therefor with built-in heating means
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/04—Cooking-vessels for cooking food in steam; Devices for extracting fruit juice by means of steam ; Vacuum cooking vessels
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/04—Cooking-vessels for cooking food in steam; Devices for extracting fruit juice by means of steam ; Vacuum cooking vessels
    • A47J27/05—Tier steam-cookers, i.e. with steam-tight joints between cooking-vessels stacked while in use
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
    • A47J27/0804—Locking devices
    • A47J27/0815—Locking devices where vessel and lid have adapted shapes to provide for the locking action
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
    • A47J27/084—Pressure-cookers; Lids or locking devices specially adapted therefor with adjustable volume; Tier pressure-cookers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/14—Cooking-vessels for use in hotels, restaurants, or canteens
    • A47J27/16—Cooking-vessels for use in hotels, restaurants, or canteens heated by steam
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/16—Inserts

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Cookers (AREA)

Description

本発明は、水蒸気を利用して炊飯を行う炊飯器に関する。 The present invention relates to a rice cooker that uses steam to cook rice.

近年、高性能な電気炊飯器が様々なメーカーから発売されており、多くの炊飯器では、例えば特許文献１に記載されているように、飯米から「おねば」と呼ばれる澱粉を主成分とする粘液質の液体を出すような炊飯が行われている。おねばは食べた瞬間は甘味として感じられるが、おねばを出す過程で米が傷付いて味の成分も漏出しており、炊き上がったご飯が粒感のある食感にはならず、濃厚な味にもならない。 In recent years, high-performance electric rice cookers have been put on the market by various manufacturers, and many rice cookers are made mainly of starch called "oneba" from cooked rice, as described in Patent Document 1, for example. The rice is cooked in such a way that it produces a slimy liquid. The moment you eat the bean paste, you feel it is sweet, but the rice is damaged in the process of serving the bean paste, and the flavor components leak out, so the cooked rice does not have a grainy texture and is rich. It doesn't taste like anything.

また、炊飯器では炊きムラの抑制が課題となっているが、例えば釜の中の米が釜の熱でのみ加熱される場合には、釜の中の外側（釜の周壁や底壁に近い側）にある米は温度が上がって水を吸いやすくなる一方、釜の中の内側（釜の周壁や底壁から遠い側）にある米は温度が上がらず水を吸いにくく炊きムラになりやすいので、これを回避するために短時間で釜の中の水を熱湯にするとともに、米を対流させたりおどらせたりする制御が行われている。このような制御は、おねばを出すための炊き方としてはともかく、粒感のある食感や濃厚な味を得るためには適当ではなく、これらを得るためには、特許文献２に記載されているように、米を釜の熱のみならず水蒸気の熱によっても加熱することが有効と考えられる。 Another issue with rice cookers is how to control uneven cooking. On the other hand, the rice on the inner side of the pot (on the side farther from the inner wall and the bottom wall of the pot) does not rise in temperature and absorbs less water, making it easier to cook unevenly. Therefore, in order to avoid this, the water in the kettle is heated in a short period of time, and the rice is controlled to cause convection and movement. This kind of control is not suitable for obtaining a grainy texture or a rich taste, aside from the way of cooking to bring out the sticky rice. As mentioned above, it is considered effective to heat the rice not only with the heat of the pot but also with the heat of the steam.

特開２０１７－１７８号公報Japanese Unexamined Patent Application Publication No. 2017-178 特公昭３２－５９８７号公報Japanese Patent Publication No. 32-5987

しかしながら、特許文献２に記載の炊飯器自体は、マイコン制御によらずに加熱釜内の加熱水がなくなった時点で電熱装置による加熱が切れるもので、加熱水が一気に１００℃まで上昇して炊飯釜内の米及び水を加熱するので、米を煮崩れさせないように炊いて粒感のある食感を出すことは難しい。 However, in the rice cooker described in Patent Document 2, the heating by the electric heating device is cut off when the heating water in the heating pot runs out without depending on the microcomputer control, and the heating water rises to 100 ° C at once and cooks rice. Since the rice and water in the pot are heated, it is difficult to cook the rice without letting it fall apart and give it a grainy texture.

本発明は、上記の事情に鑑みてなされたもので、粒感のある食感で濃厚な味のご飯を炊き上げることができる炊飯器を提供することを課題としている。 SUMMARY OF THE INVENTION It is an object of the present invention to provide a rice cooker capable of cooking rice with grainy texture and rich flavor.

上記課題を解決するために、本発明に係る炊飯器は、飯米を収容する内釜と、前記内釜の外側に設けられ、加熱水を収容する外釜と、前記外釜を加熱する加熱手段と、前記外釜に取り付けられ、前記内釜を前記外釜から離間させる離間手段とを備え、前記内釜に、前記内釜の外側に向けて突出する羽根部が設けられ、前記離間手段に、前記外釜に取り付けられた状態で前記内釜の羽根部を下方から支持する複数の支持部が設けられるとともに、前記複数の支持部の間に前記外釜と前記内釜の羽根部とが対向して形成される対向空間が設けられ、前記加熱手段による前記外釜の加熱により前記加熱水が気化してなる水蒸気が、前記離間手段により離間した前記内釜と前記外釜との間及び前記対向空間を通って前記内釜の内部に流入し、前記飯米を加熱することを特徴とする。 In order to solve the above-mentioned problems, the rice cooker according to the present invention comprises an inner pot containing cooked rice, an outer pot provided outside the inner pot and containing heated water, and heating means for heating the outer pot. and a separating means attached to the outer hook for separating the inner hook from the outer hook, wherein the inner hook is provided with a blade portion projecting toward the outside of the inner hook, and the separating means includes and a plurality of support portions are provided for supporting the blade portions of the inner pot from below while they are attached to the outer pot, and the outer pot and the blade portions of the inner pot are positioned between the plurality of support portions. A facing space is provided to face each other, and steam generated by vaporizing the heated water due to the heating of the outer pot by the heating means flows between the inner pot and the outer pot separated by the separating device, and It is characterized by flowing into the inner pot through the facing space and heating the cooked rice.

この炊飯器では、内釜を外釜から離間させる離間手段を備えているので、外釜から離間した内釜の外面が水蒸気の結露する場所として確保され、その水蒸気の凝縮熱により飯米を加熱することによって、飯米に水を吸わせながらじっくりとムラを抑制しつつ浸漬することができる。 Since this rice cooker is provided with a separating means for separating the inner pot from the outer pot, the outer surface of the inner pot separated from the outer pot is secured as a place where water vapor condenses, and the heat of condensation of the water vapor heats the cooked rice. By doing so, it is possible to soak the cooked rice slowly while suppressing unevenness while allowing the cooked rice to absorb water.

また、内釜に、内釜の外側に向けて突出する羽根部が設けられ、離間手段に、外釜に取り付けられた状態で内釜の羽根部を下方から支持する複数の支持部が設けられるとともに、複数の支持部の間に外釜と内釜の羽根部とが対向して形成される対向空間が設けられ、加熱手段による外釜の加熱により加熱水が気化してなる水蒸気が、離間手段により離間した内釜と外釜との間及び対向空間を通って内釜の内部に流入し、飯米を加熱するので、加熱水は、外釜と内釜との間の上方が支持部によりある程度閉ざされた空間の中で加熱されることになり、加熱水の加熱効率を高めることができる一方、それが高温になって気化した場合には、水蒸気が対向空間を通って内釜の内部に流入する。 Further, the inner pot is provided with blades projecting toward the outside of the inner pot, and the separating means is provided with a plurality of support portions for supporting the blades of the inner pot from below while being attached to the outer pot. In addition, a facing space is provided between the plurality of support portions, in which the outer pot and the blade portion of the inner pot face each other. The heated water flows into the inner pot through the space between the inner pot and the outer pot which are separated by means and through the facing space, and heats the cooked rice. It will be heated in a space that is closed to some extent, and the heating efficiency of the heating water can be improved. flow into

したがって、飯米は、内釜の熱により側方及び下方から、内釜の内部に流入してくる水蒸気により上方から包み込まれるように加熱され、内釜の中でどの位置にある飯米もムラなく吸水して荷崩れせずに炊かれ、飯米の形が保たれたままの、粒感のある食感で濃厚な味のご飯を炊き上げることができる。 Therefore, the cooked rice is heated from the sides and below by the heat of the inner pot and is wrapped from above by the steam flowing into the inner pot, and the cooked rice at any position in the inner pot absorbs water evenly. It is possible to cook rice with a grainy texture and a rich taste while maintaining the shape of the rice.

前記離間手段は、前記外釜に取り付けられた状態で前記内釜に当接して前記内釜を位置決めする当接部と、前記加熱水が気化してなる水蒸気の通気に供する経路を形成する通気部とを備えてもよい。これにより、当接部に位置決めされた内釜が外釜の内側でがたつかず、炊飯器の使用感が向上するとともに、加熱水は、外釜と内釜との間の上方が当接部によりある程度閉ざされた空間の中で加熱されることになり、加熱水の加熱効率を高めることができる一方、それが高温になって気化した場合には、水蒸気が隙間を通って内釜の内部に流入することができる。 The separating means includes an abutting portion that abuts against the inner pot to position the inner pot when attached to the outer pot, and a vent that forms a path for ventilating steam generated by vaporizing the heated water. You may comprise a part. As a result, the inner pot positioned at the abutment portion does not rattle inside the outer pot, and the usability of the rice cooker is improved. It will be heated in a closed space to some extent, and the heating efficiency of the heating water can be improved. can flow into

さらに、前記外釜に、前記外釜の外側に向けて突出する羽根部が設けられ、前記離間手段は、前記外釜の羽根部を外側及び下方から覆ってもよい。これにより、使用者が加熱された外釜の羽根部に直接触れる事態を防止することができる。 Further, the outer pot may be provided with blade portions projecting outwardly of the outer pot, and the spacing means may cover the blade portions of the outer pot from outside and below. This prevents the user from directly touching the blades of the heated outer pot.

本発明によれば、飯米の形が保たれたままの、粒感のある食感で濃厚な味のご飯を炊き上げることができる。 According to the present invention, it is possible to cook rice with grainy texture and rich taste while keeping the shape of cooked rice.

発明を実施するための形態に係る炊飯器の外観を示す斜視図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the external appearance of the rice cooker based on the form for implementing invention. 図１の炊飯器の蓋が開いた状態を示す斜視図である。FIG. 2 is a perspective view showing a state in which the lid of the rice cooker of FIG. 1 is open; 図１の炊飯器の部分断面図である。FIG. 2 is a partial cross-sectional view of the rice cooker of FIG. 1; 図１の炊飯器の制御系を示すブロック図である。2 is a block diagram showing a control system of the rice cooker of FIG. 1; FIG. （ａ）は図１の炊飯器の外釜及びスペーサーの分解状態を示す斜視図、（ｂ）は外釜及びスペーサーの取付状態を示す斜視図である。(a) is a perspective view showing an exploded state of an outer pot and spacers of the rice cooker of FIG. 1, and (b) is a perspective view showing an attached state of the outer pot and spacers. 図１の炊飯器の制御部による処理を示す流れ図である。2 is a flowchart showing processing by a control unit of the rice cooker of FIG. 1; 図１の炊飯器の外釜の温度変化を示す説明図である。It is explanatory drawing which shows the temperature change of the outer pot of the rice cooker of FIG. 図１の炊飯器における水蒸気の流れを示す説明図である。FIG. 2 is an explanatory diagram showing the flow of water vapor in the rice cooker of FIG. 1;

本発明を実施するための形態について、図面を用いて説明する。 A mode for carrying out the present invention will be described with reference to the drawings.

図１乃至４は、本形態に係る炊飯器を示す。この炊飯器１は、本体２と、蓋体３と、本体２の内部に着脱自在に設けられて加熱水ｗを収容する外釜４と、外釜４の内側に着脱自在に設けられて飯米Ｒ及び水Ｗを収容する内釜５と、内釜５を外釜４から離間して位置決めするスペーサー６と、蓋体３の内側に着脱自在に設けられた内蓋７と、外釜４を加熱する釜ヒーター８と、外釜４の温度を検出する釜温度センサー９と、釜ヒーター８の温度を検出するヒーター温度センサー１０と、内蓋７を加熱して内蓋７への水滴の付着を防止する蓋ヒーター１１と、釜ヒーター８及び蓋ヒーター１１の加熱を制御する制御部（マイコン）１２と、制御部１２に制御されて釜ヒーター８のオン／オフを切り替える釜ヒーター制御用リレー及び蓋ヒーター１１のオン／オフを切り替える蓋ヒーター制御用トライアックが設けられた電源基板１３とを備える。 1 to 4 show a rice cooker according to this embodiment. This rice cooker 1 includes a main body 2, a lid 3, an outer pot 4 detachably provided inside the main body 2 and containing heated water w, and a rice cooker 4 provided detachably inside the outer pot 4. An inner pot 5 for containing R and water W, a spacer 6 for positioning the inner pot 5 away from the outer pot 4, an inner lid 7 detachably provided inside the lid body 3, and an outer pot 4. A kettle heater 8 for heating, a kettle temperature sensor 9 for detecting the temperature of the outer kettle 4, a heater temperature sensor 10 for detecting the temperature of the kettle heater 8, and an inner lid 7 are heated to cause water droplets to adhere to the inner lid 7. a lid heater 11 that prevents this, a controller (microcomputer) 12 that controls the heating of the kettle heater 8 and the lid heater 11, a kettle heater control relay that switches the kettle heater 8 on and off under the control of the controller 12, and A power supply substrate 13 provided with a lid heater control triac for switching ON/OFF of the lid heater 11 is provided.

蓋体３には、蓋体３を開閉するための開蓋ボタン１４と、炊飯を開始するための炊飯ボタン１５と、炊飯を取り消すための取消ボタン１６と、炊飯モード（「白米」、「玄米」、「おかゆ」等の調理対象に関するモードや、「炊込み」、「早炊き」等の炊き方に関するモード等）の選択や炊飯予約をするためのファンクションボタン１７と、各種情報を表示するための表示部１８とが設けられている。 The lid body 3 has an open lid button 14 for opening and closing the lid body 3, a rice cooking button 15 for starting rice cooking, a cancel button 16 for canceling rice cooking, and a rice cooking mode (“polished rice”, “brown rice”). , ``porridge'' and other cooking object modes, and ``cooking'' and ``quick cooking'' modes, etc.) and function buttons 17 for making reservations for rice cooking, and for displaying various information. and a display unit 18 are provided.

外釜４はアルミニウムからなり、底壁部１９と、周壁部２０と、周壁部２０の上縁から外釜４の外側に向けて突出した羽根部２１とを有する。一方、内釜５はステンレスからなり、底壁部２２と、周壁部２３と、周壁部２３の上縁から内釜５の外側に向けて突出した羽根部２４とを有する。 The outer pot 4 is made of aluminum and has a bottom wall portion 19 , a peripheral wall portion 20 , and blade portions 21 protruding from the upper edge of the peripheral wall portion 20 toward the outer side of the outer pot 4 . On the other hand, the inner pot 5 is made of stainless steel and has a bottom wall portion 22 , a peripheral wall portion 23 , and blade portions 24 protruding from the upper edge of the peripheral wall portion 23 toward the outside of the inner pot 5 .

スペーサー６は、図５に示すように、円環状で樹脂製のアッパー部材２５及びロワー部材２６により構成され、アッパー部材２５及びロワー部材２６が外釜４の羽根部２１を上下から挟んで外釜４に取り付けられる。 As shown in FIG. 5, the spacer 6 is composed of an annular upper member 25 and a lower member 26 made of resin. 4 is attached.

アッパー部材２５は、周壁部２０の上縁付近を内側から覆うとともに、羽根部２１を上方から一部覆うもので、円環状の内面に全周にわたって複数設けられ、周壁部２３に当接して内釜５を位置決めする当接部２７と、隣接する当接部２７の間に設けられ、周壁部２３との間に隙間を形成する複数の凹部２８と、円環状の上面の３箇所に等間隔で設けられ、羽根部２４を下方から支持する支持部２９とを備える。ロワー部材２６は、羽根部２１を外側及び下方から覆い、使用者が加熱された羽根部２１に直接触れる事態を防止する。当接部２７が周壁部２３に当接し、支持部２９が羽根部２４を支持して内釜５が外釜４の内側にセットされた状態では、スペーサー６で覆われた羽根部２１と羽根部２４とが対向して両者の間に対向空間３０が形成される。 The upper member 25 covers the vicinity of the upper edge of the peripheral wall portion 20 from the inside and partially covers the blade portion 21 from above. Abutting portion 27 for positioning the hook 5, a plurality of recessed portions 28 provided between the adjacent abutting portions 27 and forming a gap with the peripheral wall portion 23, and the annular upper surface at equal intervals. and a support portion 29 that supports the blade portion 24 from below. The lower member 26 covers the blades 21 from outside and below to prevent the user from directly touching the heated blades 21 . In a state where the contact portion 27 is in contact with the peripheral wall portion 23, the support portion 29 supports the blade portion 24, and the inner hook 5 is set inside the outer hook 4, the blade portion 21 covered with the spacer 6 and the blade A facing space 30 is formed between them with the portion 24 facing each other.

炊飯器１による炊飯時、使用者は、外釜４に加熱水ｗを内釜５の底壁部２２に届かない所定の水位まで入れるとともに、内釜５に飯米Ｒ及び水Ｗを所定量入れ、ファンクションボタン１７及び炊飯ボタン１４を操作する。図６に示すように、制御部１２は、ファンクションボタン１７によりモードが選択され（ステップ１（図６において「Ｓ．１」と記載。以下同様。））、炊飯ボタン１４が押されると（ステップ２）、釜ヒーター８をオンにするとともに（ステップ３）、蓋ヒーター１１をオンにする（ステップ４）。 When cooking rice with the rice cooker 1, the user fills the outer pot 4 with heated water w to a predetermined water level that does not reach the bottom wall portion 22 of the inner pot 5, and puts a predetermined amount of rice R and water W into the inner pot 5. , the function button 17 and the rice cooking button 14 are operated. As shown in FIG. 6, when the mode is selected by the function button 17 (step 1 (described as "S.1" in FIG. 6; the same shall apply hereinafter)) and the rice cooking button 14 is pressed (step 2) Turn on the pot heater 8 (step 3) and turn on the lid heater 11 (step 4).

そして、制御部１２は、図７に示すように、外釜４が所定時間ｔ１をかけて徐々に加熱水ｗが沸騰しない所定温度Ｔ１になるように、釜ヒーター８による加熱を行うが（ステップ５）、この間、外釜４と内釜５との間では、水蒸気が凝縮して底壁部２２及び周壁部２３の外面に結露が生じ、その凝縮熱により内釜５の中の飯米Ｒ及び水Ｗは加熱される。例えば所定温度Ｔ１を６０℃以下に設定しておけば、飯米Ｒはアルファ化せずに３０パーセント程度までは水Ｗを吸うが、それ以上は吸水せず、そこまでが浸漬工程となる。 Then, as shown in FIG. 7, the control unit 12 heats the outer pot 4 by the pot heater 8 over a predetermined time t1 so that the heated water w gradually reaches a predetermined temperature T1 at which the heated water w does not boil. (Step 5) During this time, steam is condensed between the outer pot 4 and the inner pot 5 to form dew condensation on the outer surfaces of the bottom wall portion 22 and the peripheral wall portion 23, and the heat of condensation causes the cooked rice in the inner pot 5 to R and water W are heated. For example, if the predetermined temperature T1 is set to 60° C. or less, the cooked rice R does not turn into gelatin and absorbs up to about 30% of the water W, but does not absorb any more water, and the soaking process ends up to that point.

次に、制御部１２は、ヒーター温度センサー１０のフィードバックを受けながら釜ヒーター８を１００℃を超える所定温度Ｔ２に維持し（ステップ６）、外釜４の中の加熱水ｗがなくなるまで釜ヒーター８による加熱を続ける（ステップ７）。加熱水ｗが蒸発して一定水量以下になった場合には、外釜４の温度が加熱水ｗにより維持されなくなり急激な温度上昇が発生するので、制御部１２は、釜温度センサー９の検出結果により、加熱水ｗがなくなったか否かを判断することができる。この沸騰工程では、加熱水ｗが気化してなる水蒸気が底壁部２２及び周壁部２３を通じて飯米Ｒ及び水Ｗを側方及び下方から加熱するとともに、図８に示すように、凹部２８、対向空間３０及び内蓋７と羽根部２４との間を通り、内釜５の内部に流入して飯米Ｒ及び水Ｗを上方からも加熱する。 Next, while receiving feedback from the heater temperature sensor 10, the control unit 12 maintains the pot heater 8 at a predetermined temperature T2 exceeding 100°C (step 6), and continues until the heating water w in the outer pot 4 runs out. Heating by the heater 8 is continued (step 7). When the heated water w evaporates and the amount of water drops below a certain level, the temperature of the outer pot 4 is no longer maintained by the heated water w and a sudden temperature rise occurs. Based on the result, it can be determined whether or not the heating water w has run out. In this boiling process, water vapor obtained by vaporizing the heated water w heats the cooked rice R and the water W from the sides and below through the bottom wall portion 22 and the peripheral wall portion 23, and as shown in FIG. It passes through the space 30 and between the inner lid 7 and the blade portion 24 and flows into the inner pot 5 to heat the cooked rice R and water W also from above.

外釜４の中の加熱水ｗがなくなると、制御部１２は、釜ヒーター８をオフにして蒸らしを行う（ステップ８）。この蒸らし工程は所定時間ｔ２が経過するまで継続し（ステップ９）、所定時間ｔ２が経過すると、制御部１２は、炊飯が完了したとして使用者にその旨を音その他で通知し（ステップ１０）、蓋ヒーター１１をオフにする（ステップ１１）。 When the heating water w in the outer kettle 4 runs out, the controller 12 turns off the kettle heater 8 to perform steaming (step 8). This steaming process continues until the predetermined time t2 elapses (step 9), and when the predetermined time t2 elapses, the control unit 12 notifies the user that the rice cooking is completed by sound or the like (step 10), turn off the lid heater 11 (step 11).

本形態に係る炊飯器１では、制御部１２が、まず加熱水ｗが沸騰しない所定温度になるまで釜ヒーター８による加熱を行い、底壁部２２及び周壁部２３の外面における水蒸気の凝縮熱により飯米Ｒを加熱するので、飯米Ｒに水Ｗを吸わせながらじっくりとムラを抑制しつつ浸漬することができる。続いて、制御部１２が、加熱水ｗが沸騰するまで釜ヒーター８による加熱を行い、加熱水ｗが気化してなる水蒸気を内釜５の内部に流入させて飯米Ｒを加熱するので、飯米Ｒは内釜５の熱により側方及び下方から、内釜５の内部に流入してくる水蒸気により上方から包み込まれるように加熱され、内釜５の中でどの位置にある飯米Ｒもムラなく余力分を吸水して煮崩れせずに炊かれる。これにより、飯米Ｒの形が保たれたままの、粒感のある食感で濃厚な味のご飯を炊き上げることができる。 In the rice cooker 1 according to the present embodiment, the controller 12 first heats the water w by the pot heater 8 until it reaches a predetermined temperature at which the heated water w does not boil, and the heat of condensation of water vapor on the outer surfaces of the bottom wall portion 22 and the peripheral wall portion 23 Since the cooked rice R is heated, the cooked rice R can be soaked slowly while suppressing unevenness while absorbing the water W. Subsequently, the control unit 12 heats the boiled rice by the pot heater 8 until the heated water w boils, and the steam generated by vaporizing the heated water w flows into the inner pot 5 to heat the rice R. The R is heated from the sides and below by the heat of the inner pot 5 and is wrapped from above by steam flowing into the inner pot 5, and the rice R at any position in the inner pot 5 is evenly heated. It absorbs excess water and is cooked without falling apart. As a result, it is possible to cook the rice with grainy texture and rich taste while keeping the shape of the cooked rice R.

また、炊飯器１は、内釜５を外釜４から離間して位置決めするスペーサー６を備えているので、外釜４から離間して位置決めされた内釜５の外面（底壁部２２及び周壁部２３の外面）が水蒸気の結露する場所として確保され、水蒸気の凝縮熱による加熱を安定化することができるとともに、位置決めされた内釜５が外釜４の内側でがたつかず、炊飯器１の使用感を向上させることができる。 In addition, since the rice cooker 1 is provided with the spacer 6 for positioning the inner pot 5 away from the outer pot 4, the outer surface of the inner pot 5 (the bottom wall portion 22 and the peripheral wall portion) positioned apart from the outer pot 4 is provided. The outer surface of the portion 23) is secured as a place where water vapor condenses, and the heating by the heat of condensation of water vapor can be stabilized, and the positioned inner pot 5 does not rattle inside the outer pot 4, and the rice cooker 1 can improve usability.

さらに、スペーサー６は、外釜４に取り付けられた状態で内釜５に当接して内釜５を位置決めする当接部２７と、加熱水ｗが気化してなる水蒸気の通気に供する隙間（経路）を形成する凹部２８と、羽根部２４を下方から支持する３つの支持部２９とを備え、３つの支持部２９のそれぞれの間に羽根部２１と羽根部２４との対向空間３０が形成され、この対向空間３０も加熱水ｗが気化してなる水蒸気の通気に供する。したがって、加熱水ｗは、外釜４と内釜５との間の上方が当接部２７及び支持部２９によりある程度閉ざされた空間の中で加熱されることになり、加熱水ｗの加熱効率を高めることができる一方、それが高温になって気化した場合には、水蒸気が凹部２８及び対向空間３０を通って内釜５の内部に流入することができる。 Furthermore, the spacer 6 has a contact portion 27 that abuts against the inner pot 5 and positions the inner pot 5 while attached to the outer pot 4, and a gap (pathway ), and three support portions 29 for supporting the blade portion 24 from below. , This opposing space 30 is also used for ventilation of water vapor obtained by vaporizing the heating water w. Therefore, the heated water w is heated in a space in which the upper portion between the outer pot 4 and the inner pot 5 is closed to some extent by the contact portion 27 and the support portion 29, and the heating efficiency of the heated water w is On the other hand, when it reaches a high temperature and evaporates, the steam can flow into the inner pot 5 through the recess 28 and the facing space 30 .

以上、本発明を実施するための形態について例示したが、本発明の実施形態は上述したものに限られず、発明の趣旨を逸脱しない範囲で適宜変更等してもよい。 Although the embodiments for carrying out the present invention have been exemplified above, the embodiments of the present invention are not limited to those described above, and may be modified as appropriate without departing from the gist of the invention.

例えば、制御部１２は釜センサー８により外釜４の温度を観察しながら制御を行うとしたが、内釜の温度や加熱水の温度を観察しながら制御を行ってもよい。 For example, the control unit 12 performs control while observing the temperature of the outer pot 4 by the pot sensor 8, but may also perform control while observing the temperature of the inner pot and the temperature of the heating water.

また、通気部として隣接する当接部２７の間に凹部２８を設けたが、スペーサー６に凹部２８を設けず円環状の全周にわたって周壁部２３と当接させながら、適宜の箇所に水蒸気の通気に供する通気孔を設ける等の形態を採ってもかまわない。 In addition, although the recessed portion 28 is provided between the adjacent abutment portions 27 as a ventilation portion, the spacer 6 is not provided with the recessed portion 28, but is brought into contact with the peripheral wall portion 23 over the entire circumference of the annular shape. A form such as providing a ventilation hole for ventilation may be adopted.

１ 炊飯器
４ 外釜
５ 内釜
６ スペーサー（離間手段）
８ 釜ヒーター（加熱手段）
１２ 制御部
２４ 羽根部
２７ 当接部
２８ 凹部（通気部）
２９ 支持部
３０ 対向空間
ｗ 加熱水 1 rice cooker 4 outer pot 5 inner pot 6 spacer (separating means)
8 Kettle heater (heating means)
12 Control portion 24 Blade portion 27 Contact portion 28 Concave portion (ventilation portion)
29 support portion 30 facing space w heated water

Claims (3)

飯米を収容する内釜と、
前記内釜の外側に設けられ、加熱水を収容する外釜と、
前記外釜を加熱する加熱手段と、
前記外釜に取り付けられ、前記内釜を前記外釜から離間させる離間手段とを備え、
前記内釜に、前記内釜の外側に向けて突出する羽根部が設けられ、
前記離間手段に、前記外釜に取り付けられた状態で前記内釜の羽根部を下方から支持する複数の支持部が設けられるとともに、前記複数の支持部の間に前記外釜と前記内釜の羽根部とが対向して形成される対向空間が設けられ、
前記加熱手段による前記外釜の加熱により前記加熱水が気化してなる水蒸気が、前記離間手段により離間した前記内釜と前記外釜との間及び前記対向空間を通って前記内釜の内部に流入し、前記飯米を加熱することを特徴とする炊飯器。 an inner pot containing cooked rice;
an outer pot provided outside the inner pot and containing heated water;
heating means for heating the outer pot;
a separating means attached to the outer pot and separating the inner pot from the outer pot;
The inner pot is provided with a blade portion protruding toward the outside of the inner pot,
The separating means is provided with a plurality of supporting portions for supporting the blades of the inner hook from below while attached to the outer hook, and between the plurality of supporting portions between the outer hook and the inner hook. A facing space formed facing the blade is provided,
Vapor generated by vaporizing the heated water by heating the outer pot by the heating means enters the inner pot through the space between the inner pot and the outer pot separated by the separating device and the facing space. A rice cooker characterized in that it flows in and heats the cooked rice. 前記離間手段が、前記外釜に取り付けられた状態で前記内釜に当接して前記内釜を位置決めする当接部と、前記加熱水が気化してなる水蒸気の通気に供する経路を形成する通気部とを備えることを特徴とする請求項１に記載の炊飯器。 The separating means includes an abutting portion that abuts against the inner pot to position the inner pot when attached to the outer pot, and a vent that forms a path for ventilating water vapor generated by vaporizing the heated water. 2. The rice cooker according to claim 1, further comprising a portion. 前記外釜に、前記外釜の外側に向けて突出する羽根部が設けられ、
前記離間手段は、前記外釜の羽根部を外側及び下方から覆うことを特徴とする請求項１又は請求項２に記載の炊飯器。 The outer pot is provided with a blade portion protruding toward the outside of the outer pot,
3. The rice cooker according to claim 1, wherein the spacing means covers the blades of the outer pot from outside and below.
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