JP3107185B2 - Rice cooker abnormality detection device - Google Patents
Rice cooker abnormality detection deviceInfo
- Publication number
- JP3107185B2 JP3107185B2 JP06149968A JP14996894A JP3107185B2 JP 3107185 B2 JP3107185 B2 JP 3107185B2 JP 06149968 A JP06149968 A JP 06149968A JP 14996894 A JP14996894 A JP 14996894A JP 3107185 B2 JP3107185 B2 JP 3107185B2
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- Prior art keywords
- inner pot
- temperature
- temperature sensor
- lid
- detected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Description
【０００１】[0001]
【産業上の利用分野】本発明は炊飯器の異常検出装置に
関するものであり、詳しくは器体内の内鍋を電磁誘導に
より発熱させて炊飯を行う炊飯器の異常検出装置に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting an abnormality in a rice cooker, and more particularly to an apparatus for detecting an abnormality in a rice cooker that cooks rice by causing an inner pot in the container to generate heat by electromagnetic induction.
【０００２】[0002]
【従来の技術】従来、電磁誘導を利用して内鍋を発熱さ
せて炊飯を行う炊飯器は、本発明の一実施例を示す図１
を参照して、器体１に収容した内鍋２を、器体１側のワ
ークコイル３からの電磁誘導作用によって、メニューや
炊飯の進行状態に応じた温度で発熱させるように制御す
るのに、内鍋２の温度をこの内鍋２の底部中央と当接し
合う内鍋温度センサ５０によって検出しモニタするよう
にしている。2. Description of the Related Art A conventional rice cooker for cooking rice by heating an inner pot using electromagnetic induction is shown in FIG.
With reference to, the inner pan 2 housed in the body 1 is controlled to generate heat at a temperature according to the progress of menu and rice cooking by electromagnetic induction from the work coil 3 on the body 1 side. The temperature of the inner pan 2 is detected and monitored by an inner pan temperature sensor 50 which is in contact with the bottom center of the inner pan 2.
【０００３】[0003]
【発明が解決しようとする課題】ところで内鍋温度セン
サ５０は、器体１内に収容されてくる内鍋２の底部中央
と当接し合うようになっている。By the way, the inner pot temperature sensor 50 comes into contact with the center of the bottom of the inner pot 2 accommodated in the body 1.
【０００４】内鍋２が内鍋温度センサ５０の上に載ると
き、内鍋２の底部と内鍋温度センサ５０との間に米粒等
の異物が挟まることがときとしてある。When the inner pot 2 is placed on the inner pot temperature sensor 50, foreign substances such as rice grains are sometimes caught between the bottom of the inner pot 2 and the inner pot temperature sensor 50.
【０００５】このような状態では、内鍋温度センサ５０
は内鍋２からの熱伝導を妨げられ、内鍋２の昇温状態を
的確に捕らえられなくなる。このため、内鍋２が所定の
温度に達しているのに、内鍋温度センサ５０が検知する
内鍋２の温度はこれよりも低く、内鍋２を所定温度にま
で上げるための制御が続き、内鍋２が過剰に発熱させら
れ、器体１の樹脂製肩部が溶けるようなことが考えられ
る。In such a state, the inner pot temperature sensor 50
The heat conduction from the inner pan 2 is hindered, and the temperature rise state of the inner pan 2 cannot be accurately captured. For this reason, even though the inner pan 2 has reached the predetermined temperature, the temperature of the inner pan 2 detected by the inner pan temperature sensor 50 is lower than this, and control for raising the inner pan 2 to the predetermined temperature continues. It is conceivable that the inner pan 2 is excessively heated and the resin shoulder of the body 1 melts.
【０００６】これにつき、本発明者等が種々に実験し研
究した結果、図８に示す異物の挟まりのない正常炊飯時
と、図９に示す異物が挟まっている異物炊飯時とでは、
内鍋温度センサ５０による内鍋２の検出温度と、内鍋２
の口部を閉じる内蓋１４が内鍋２からの熱伝導により昇
温する場合の温度との関係が異なることが判明した。As a result of various experiments and studies conducted by the present inventors, it has been found that normal rice cooking without foreign matter shown in FIG. 8 and rice cooking shown in FIG.
The detected temperature of the inner pan 2 by the inner pan temperature sensor 50 and the inner pan 2
It has been found that the relationship between the inner lid 14 and the temperature when the inner lid 14 closing the mouth is heated by heat conduction from the inner pan 2 is different.
【０００７】正常炊飯時では内鍋温度センサ５０による
沸騰温度の検出とほぼ同時に内蓋１４も沸騰温度に達
し、通電による初期加熱炊飯操作から、メニューや炊飯
の進行状態に応じた通電による炊き上げ炊飯操作への移
行が適正になされる。異物炊飯時では、内蓋１４の昇温
が正常炊飯時よりも早く、早期に沸騰温度に達するが、
内鍋温度センサ５０による内鍋２の検出温度の上昇が遅
れ、初期加熱炊飯操作から炊き上げ炊飯操作への移行
が、沸騰状態になった時点よりも遅れる。At the time of normal rice cooking, the inner lid 14 reaches the boiling temperature almost simultaneously with the detection of the boiling temperature by the inner pot temperature sensor 50. From the initial heating rice cooking operation by energization, the cooking by energization according to the progress of the menu and rice cooking. The transition to the rice cooking operation is properly performed. At the time of cooking foreign matter, the temperature of the inner lid 14 rises to the boiling temperature earlier and earlier than during normal cooking,
The rise in the temperature of the inner pot 2 detected by the inner pot temperature sensor 50 is delayed, and the transition from the initial heating rice cooking operation to the cooked rice cooking operation is delayed from the time when the boiling state is reached.
【０００８】本発明は従来のような問題を解消すること
を課題とし、簡単なソフト制御により、前記のような異
物による異常状態を適正に検出することができる炊飯器
を提供することを主たる目的とするものである。SUMMARY OF THE INVENTION An object of the present invention is to provide a rice cooker capable of properly detecting an abnormal state due to a foreign substance as described above by simple software control. It is assumed that.
【０００９】[0009]
【課題を解決するための手段】本発明の炊飯器の異常検
出装置は、上記のような目的を達成するために、内鍋と
当接し合ってこの内鍋の温度を検出する内鍋温度センサ
と、器体内の内鍋をワークコイルからの電磁誘導により
発熱させる加熱手段と、内鍋をフルパワーで発熱させる
炊飯操作工程の過程での内鍋温度センサによる検出温度
が、基準温度よりも低いことにより、内鍋と内鍋温度セ
ンサとの間に異物が挟まった異常状態を検出する検出手
段とを備えたことを第１の特徴とする。SUMMARY OF THE INVENTION In order to achieve the above object, an apparatus for detecting an abnormality of a rice cooker according to the present invention has an inner pot temperature sensor which abuts on an inner pot to detect the temperature of the inner pot. The heating means for heating the inner pot in the vessel by electromagnetic induction from the work coil, and the temperature detected by the inner pot temperature sensor in the process of the rice cooking operation process for causing the inner pot to generate heat at full power are the reference. A first feature is that a detection means is provided for detecting an abnormal state in which a foreign substance is caught between the inner pot and the inner pot temperature sensor because the temperature is lower than the temperature.
【００１０】本発明の炊飯器の異常検出装置は、上記の
ような目的を達成するために、内鍋と当接し合ってこの
内鍋の温度を検出する内鍋温度センサと、内鍋を蓋する
内蓋の温度を検出する蓋温度センサと、器体内の内鍋を
ワークコイルからの電磁誘導により発熱させる加熱手段
と、炊飯操作工程の過程での内鍋温度センサによる検出
温度に対する、蓋温度センサによる検出温度との温度差
により、内鍋と内鍋温度センサとの間に異物が挟まって
生じた異常昇温を検出する検出手段とを備えたことを第
２の特徴とする。In order to achieve the above object, an abnormality detection device for a rice cooker according to the present invention has an inner pot temperature sensor for contacting an inner pot to detect the temperature of the inner pot, and a lid for the inner pot. Lid temperature sensor for detecting the temperature of the inner lid to be heated, heating means for generating heat from the inner pot in the housing by electromagnetic induction from the work coil, and lid temperature for the temperature detected by the inner pot temperature sensor in the process of the rice cooking operation process A second feature is that a detecting means for detecting an abnormal temperature rise caused by a foreign substance being sandwiched between the inner pot and the inner pot temperature sensor based on a temperature difference from a temperature detected by the sensor is provided.
【００１１】本発明の炊飯器の異常検出装置は、内鍋と
当接し合ってこの内鍋の温度を検出する内鍋温度センサ
と、器体内の内鍋をワークコイルからの電磁誘導により
発熱させる加熱手段と、内鍋をフルパワーで発熱させる
炊飯操作工程の過程での内鍋温度センサによる検出温度
が、基準温度よりも低いことにより、内鍋と内鍋温度セ
ンサとの間に異物が挟まった異常状態を検出する第１の
検出手段と、内鍋を蓋する内蓋の温度を検出する蓋温度
センサと、炊飯操作工程の過程での内鍋温度センサによ
る検出温度に対する、蓋温度センサによる検出温度との
温度差により、内鍋と内鍋温度センサとの間に異物が挟
まって生じた異常昇温を検出する第２の検出手段とを備
え、第１、第２の各検出手段のどちらの検出があっても
内鍋と内鍋温度センサとの間に異物が挟まった異常状態
を検出することを第３の特徴とするものである。The rice cooker abnormality detecting device according to the present invention comprises an inner pot temperature sensor for coming into contact with the inner pot to detect the temperature of the inner pot, and causing the inner pot in the body to generate heat by electromagnetic induction from a work coil. The heating means and the inner pot generate heat at full power <br/> The temperature detected by the inner pot temperature sensor during the rice cooking operation process is lower than the reference temperature, so that the inner pot and the inner pot temperature sensor First detecting means for detecting an abnormal state in which a foreign object is caught in the inner pot, a lid temperature sensor for detecting the temperature of the inner lid for closing the inner pot , and an inner pot temperature sensor in the course of the rice cooking operation process .
A second detecting means for detecting an abnormal temperature rise caused by a foreign substance being caught between the inner pot and the inner pot temperature sensor, based on a temperature difference between the detected temperature and the temperature detected by the lid temperature sensor. A third feature is that, regardless of which of the first and second detection means detects, an abnormal state in which a foreign object is caught between the inner pot and the inner pot temperature sensor is detected.
【００１２】[0012]
【作用】本発明の炊飯器の異常検出装置の第１の特徴の
上記構成では、内鍋を加熱手段がワークコイルからの電
磁誘導により発熱させる炊飯操作工程の過程において、
内鍋と当接し合ってこの内鍋の温度を検出する内鍋温度
センサと、前記内鍋との間に、米粒等の異物が挟まって
いる場合、内鍋はワークイルからの電磁誘導によりそれ
自体が発熱されるが、内鍋温度センサは内鍋からの熱伝
導を妨げられ、内鍋の温度を実際よりも低く検出してし
まうことがある。この場合でも、内鍋温度センサの検出
温度が、基準温度よりも低いことにより、内鍋と内鍋温
度センサとの間に異物が挟まった異常状態であることを
検出手段によって検出することができる。この異常状態
の検出を、内鍋をフルパワーで発熱させる炊飯操作工程
の過程に行うと、温度センサと内鍋との間に異物の挟み
こみがある場合、温度センサの検出温度と内鍋の実際の
温度との開きが大きくなるので、異常状態の検出がより
確実に行える。According to the first feature of the rice cooker abnormality detecting device of the present invention, in the rice cooking operation process in which the heating means heats the inner pan by electromagnetic induction from the work coil,
When a foreign matter such as rice grains is interposed between the inner pot temperature sensor that contacts the inner pot and detects the temperature of the inner pot, and the inner pot, the inner pot itself is electromagnetically induced from the workoil. Is generated, but heat conduction from the inner pot is hindered, and the temperature of the inner pot may be detected lower than the actual temperature. Also in this case, since the detected temperature of the inner pot temperature sensor is lower than the reference temperature, it is possible to detect by the detecting means that an abnormal state in which a foreign object is caught between the inner pot and the inner pot temperature sensor. . The rice cooking operation process that detects the abnormal state by heating the inner pot with full power
Doing the process, when there is a nipping foreign matter between the temperature sensor and the inner bowl, the open and actual temperature of the detected temperature and the inner pot temperature sensor increases, more reliable detection of abnormal state Can be done.
【００１３】また、本発明の炊飯器の異常検出装置の第
２の特徴の上記構成では、器体内の内鍋を加熱手段がワ
ークコイルからの電磁誘導により発熱させる炊飯操作工
程の過程にて、内鍋と当接し合ってこの内鍋の温度を検
出する内鍋温度センサは次第に昇温する内鍋の温度を検
出し、内蓋の温度を検出する蓋温度センサによる内蓋の
検出温度と、内鍋温度センサによる内鍋の検出温度との
差を検出する。この場合、内鍋温度センサと内鍋との間
に異物が挟まっているようなとき、内鍋温度センサによ
る内鍋の検出温度は実際の内鍋の温度よりも低くなるの
で、内鍋温度センサの検出温度と蓋温度センサの検出温
度との差は前記所定の範囲と異なることにより、内鍋温
度センサと内鍋との間に異物が挟まっていることによる
内蓋の異常昇温を検出することができる。[0013] In the rice cooker abnormality detecting apparatus according to the second feature of the present invention, in the rice cook operation process in which the heating means heats the inner pot in the body by electromagnetic induction from the work coil, The inner pot temperature sensor that contacts the inner pot and detects the temperature of this inner pot detects the temperature of the inner pot that gradually rises in temperature, and the detected temperature of the inner lid by the lid temperature sensor that detects the temperature of the inner lid, The difference from the temperature detected by the inner pot by the inner pot temperature sensor is detected. In this case, when foreign matter is sandwiched between the inner pot temperature sensor and the inner pot, the detected temperature of the inner pot by the inner pot temperature sensor becomes lower than the actual temperature of the inner pot. The difference between the detected temperature of the inner lid and the detected temperature of the lid temperature sensor is different from the predetermined range, thereby detecting an abnormal rise in the temperature of the inner lid due to a foreign object being interposed between the inner pan temperature sensor and the inner pan. be able to.
【００１４】本発明の炊飯器の異常検出装置の第３の特
徴の上記構成では、第１の特徴における検出手段による
場合と同様な異常状態を得る第１の検出手段による検出
機能と、第２の特徴における検出手段による場合と同様
な内蓋の異常昇温状態を得る第２の検出手段による検出
機能との、いずれかによって、温度センサの異常状態を
より適正に検出することができ、検出の精度と確実性を
向上することができる。In the above configuration of the third characteristic of the rice cooker abnormality detecting device according to the present invention, the detection function by the first detection means for obtaining the same abnormal state as that by the detection means in the first characteristic, and the second function. And the detection function of the second detection means for obtaining the same abnormal temperature rise state of the inner lid as that of the detection means in the feature of (1), the abnormal state of the temperature sensor can be more appropriately detected. Accuracy and reliability can be improved.
【００１５】[0015]
【実施例】以下、本発明の幾つかの実施例について、図
１〜図７を参照しながら説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some embodiments of the present invention will be described below with reference to FIGS.
【００１６】図１は本発明の第１の実施例の炊飯ジャー
を示している。図示のものは、器体１内に内鍋２を収容
し、この内鍋２を器体１の底部に有するワークコイル３
による電磁誘導にて炊飯および保温を行う。保温時は炊
飯時に比し低容量状態の通電とする。FIG. 1 shows a rice cooker according to a first embodiment of the present invention. The illustrated work coil 3 accommodates an inner pot 2 in a body 1 and has the inner pot 2 at the bottom of the body 1.
Rice cooked and kept warm by electromagnetic induction. At the time of heat retention, electricity is supplied in a lower capacity state than when cooking rice.
【００１７】器体１は、外装ケースとなる外容器４と内
鍋収容空間２０を形成する内容器５とが樹脂製の肩部材
６により一体に結合して形成され、これら内外容器４、
５間に、前記ワークコイル３、電源制御基板７、これの
発熱素子等を冷却するファン８、表示部９と、前端の動
作制御を行うマイクロコンピュータ５７を搭載したマイ
コン制御基板１０等を収容している。The container 1 is formed by integrally connecting an outer container 4 serving as an outer case and an inner container 5 forming an inner pot accommodating space 20 by a shoulder member 6 made of resin.
The work coil 3, the power supply control board 7, the fan 8 for cooling the heating elements thereof and the like, the display unit 9, and the microcomputer control board 10 mounted with the microcomputer 57 for controlling the operation of the front end are accommodated between the five. ing.
【００１８】器体１の開口には樹脂製の蓋体１２が設け
られ、器体１の口縁の後部軸受部１７に軸１３によって
開閉自在に枢支されている。蓋体１２は樹脂製の外板２
３と内板２４との２重構造であり、内板２４の開口に金
属製の内蓋１４が嵌め付けられている。この嵌め付け部
には内鍋２の口縁と内蓋１４の外周との間をシールする
シールパッキング８２が設けられ、内蓋１４によって内
鍋２の口部を閉じるようにしてある。A cover 12 made of resin is provided at an opening of the body 1, and is pivotally supported by a shaft 13 on a rear bearing 17 of the rim of the body 1 by a shaft 13. The lid 12 is made of a resin outer plate 2.
3 and an inner plate 24, and a metal inner lid 14 is fitted into an opening of the inner plate 24. The fitting portion is provided with a seal packing 82 for sealing between the edge of the inner pot 2 and the outer periphery of the inner lid 14, and the inner lid 14 closes the mouth of the inner pot 2.
【００１９】内蓋１４には内鍋２内で発生する蒸気を外
部へ逃がす蒸気パイプ１５を有し、これが外板２３が形
成する開口１６に臨みこの開口１６を通じて蒸気を蓋体
１２の外部に排出する。開口１６の下縁と内蓋１４の蒸
気パイプ１５を設けた部分の外まわりとの間にはシール
パッキング２７が設けられ、双方間をシールして開口１
６に出てくる蒸気が蓋体１２内に侵入しないようにして
いる。The inner lid 14 has a steam pipe 15 for letting steam generated in the inner pot 2 escape to the outside. The steam pipe 15 faces an opening 16 formed by the outer plate 23, and the steam passes through the opening 16 to the outside of the lid 12. Discharge. A seal packing 27 is provided between the lower edge of the opening 16 and the outer periphery of the portion of the inner lid 14 where the steam pipe 15 is provided.
6 is prevented from entering the lid 12.
【００２０】蓋体１２は枢支部まわりに働かせたばね１
８の付勢によって開き方向に付勢されているが、閉じ状
態では器体１の口縁の前部に軸２５により枢支されたロ
ックレバー１９に先端１２ａ部が係合することによって
閉じ状態に係止され安定する。ロックレバー１９がばね
１８に抗して押圧操作され先端１ａとの係合が外れるこ
とにより蓋体１２はばね１８によって自動的に開かれ
る。しかしこの開き動作には蓋体１２の後部内に設けた
板ばね２２が前記軸受部１７の一部に摺接することによ
り制動を受け、蓋体１２が緩やかな速度で開かれるよう
になっている。The cover 12 is provided with a spring 1 working around a pivot.
In the closed state, the distal end 12a engages with the lock lever 19 pivotally supported by the shaft 25 at the front of the rim of the body 1 in the closed state. It is locked and stabilized. When the lock lever 19 is pressed against the spring 18 and disengaged from the tip 1a, the lid 12 is automatically opened by the spring 18. However, in this opening operation, the leaf spring 22 provided in the rear portion of the lid 12 is braked by sliding on a part of the bearing portion 17, so that the lid 12 is opened at a gentle speed. .
【００２１】内容器５は、ポリアミド等の樹脂製の底部
５ｂと、金属製の胴部５ａとを突き合わせた状態で形成
して、上端を肩部材６の内周に連結されている。胴部５
ａの外まわりには胴部ヒータ２１を巻付けるとともに、
内蓋１４の上面に蓋ヒータ３５が設けられ、これら胴部
ヒータ２１および蓋ヒータ３５によってワークコイル３
の低容量通電による保温時の加熱を補うだけで、まわり
から温度差なしに加熱できて、結露が生じるようなこと
なく、内鍋２内のご飯を長時間おいしく保温することが
できる。The inner container 5 has a bottom 5b made of a resin such as polyamide and a body 5a made of metal, and is formed in a state where the bottom 5b is abutted on the bottom 5b. The upper end is connected to the inner periphery of the shoulder member 6. Torso 5
While the body heater 21 is wound around the outer periphery of a,
A cover heater 35 is provided on the upper surface of the inner cover 14, and the work coil 3
By simply supplementing the heating at the time of warming due to the low-capacity energization, heating can be performed without a temperature difference from the surroundings, and the rice in the inner pot 2 can be kept delicious for a long time without dew condensation.
【００２２】内容器５の外まわりにはまた、金属製の囲
い壁３１や、ポリアミド等の樹脂製の囲い壁３２が設け
られ、内容器５との間に断熱空間３４を形成し、前記内
容器５の底部５ｂとこれに対向している囲い壁３２との
間の部分に前記ワークコイル３を設置している。これに
より、内鍋収容空間２０に収容する内鍋２の外まわり
を、内容器５および囲い壁３１、３２がなす２重壁とこ
れらの間の断熱空間３４とで囲って３重に断熱すること
になるので、内鍋２のまわりでの外部への放熱を防止し
易い。A metal surrounding wall 31 and a resin surrounding wall 32 made of polyamide or the like are provided around the outer periphery of the inner container 5 to form a heat insulating space 34 between the inner container 5 and the inner container 5. The work coil 3 is installed in a portion between the bottom 5b of the fifth member 5 and the surrounding wall 32 facing the bottom 5b. Thereby, the outer periphery of the inner pot 2 housed in the inner pot housing space 20 is surrounded by the inner wall 5 and the double walls formed by the enclosing walls 31 and 32, and the heat insulating space 34 therebetween, so as to be triple insulated. Therefore, it is easy to prevent heat radiation around the inner pot 2 to the outside.
【００２３】囲い壁３２の外側にはフェライトコア１４
２を設けてワークコイル３による電磁誘導のための磁界
形成が安定するようにしてある。The ferrite core 14 is provided outside the surrounding wall 32.
2, the formation of a magnetic field for electromagnetic induction by the work coil 3 is stabilized.
【００２４】外容器４は、樹脂製の容器型一体成形物で
あり、肩部材６の外周との無理嵌めにて連結されてい
る。外容器４の底壁３７との間に、電源制御基板を収容
する収容室３９を形成し、ファン８は電源制御基板７の
ない部分の、囲い壁３２と底壁３７との間に設けられて
いる。底壁３７の一部にはファン８の吸気口４３が設け
らている。The outer container 4 is a container-type integrally molded product made of resin, and is connected to the outer periphery of the shoulder member 6 by forcible fitting. An accommodating chamber 39 for accommodating the power supply control board is formed between the bottom wall 37 of the outer container 4 and the fan 8 is provided between the surrounding wall 32 and the bottom wall 37 in a portion where the power supply control board 7 is not provided. ing. An intake port 43 of the fan 8 is provided in a part of the bottom wall 37.
【００２５】器体１の前部の外容器４と内容器５との間
には、他の部分よりも広い拡張空間５１が形成され、こ
の拡張空間５１に前記表示部９とマイコン制御基板１０
が設けられている。An expansion space 51 wider than other portions is formed between the outer container 4 and the inner container 5 at the front of the body 1, and the display unit 9 and the microcomputer control board 10 are formed in the expansion space 51.
Is provided.
【００２６】表示部９は肩部材６の前部上面にシールシ
ート１０１を貼り付けて形成された操作パネル５２の直
ぐ裏に位置し、肩部材６の裏側にビス５３により取付け
られ、操作パネル５２からのキー操作を受けるととも
に、この操作パネル５２に対し操作や動作の状態、炊飯
のスタート等各種の点灯表示を行うようになっている。The display unit 9 is located immediately behind the operation panel 52 formed by attaching the seal sheet 101 to the upper surface of the front part of the shoulder member 6, and is attached to the back side of the shoulder member 6 with screws 53. In addition to receiving a key operation from the user, various lighting displays such as operation and operation status, rice cooking start, and the like are performed on the operation panel 52.
【００２７】マイコン制御基板１０は、表示部９の樹脂
製の基体６０と一体形成され前記拡張空間５１内に垂下
するようにした保護壁５４の外面にビス５５により取付
けられている。The microcomputer control board 10 is mounted by screws 55 on the outer surface of a protective wall 54 which is formed integrally with the resin base 60 of the display section 9 and hangs down in the expansion space 51.
【００２８】図２は本実施例の炊飯ジャーの電源制御基
板７、表示部９、およびマイコン制御基板１０にて構成
される全体の制御回路を示し、交流電源５５に胴部ヒー
タ２１および蓋ヒータ３５がトライアック５６ａ、５６
ｂを介し接続され、これらトライアック５６ａ、５６ｂ
をマイクロコンピュータ５７によって動作制御して、胴
部ヒータ２１および蓋ヒータ３５を設定通りに通電制御
できるようにしている。FIG. 2 shows an entire control circuit composed of a power supply control board 7, a display section 9, and a microcomputer control board 10 of the rice cooker of this embodiment. 35 is a triac 56a, 56
b, and these triacs 56a, 56b
Is controlled by the microcomputer 57 so that the body heater 21 and the lid heater 35 can be energized as set.
【００２９】なお、マイクロコンピュータ５７には内鍋
２の底部と当接し合って炊飯温度や保温温度を検出する
内鍋温度センサ（以下本実施例ではセンターセンサと言
う）５０の他、内蓋１４の上面に取付けられて内蓋１４
の温度を検出する蓋温度センサ７０が接続され、センタ
ーセンサ５０および蓋温度センサ７０からの温度情報を
もとに前記炊飯や保温のための通電制御を行うようにし
てある。The microcomputer 57 includes an inner pot temperature sensor (hereinafter, referred to as a center sensor in the present embodiment) 50 which comes into contact with the bottom of the inner pot 2 to detect a rice cooking temperature and a warming temperature, and also the inner lid 14. Attached to the upper surface of the inner lid 14
Is connected, and based on temperature information from the center sensor 50 and the lid temperature sensor 70, the energization control for rice cooking and heat retention is performed.
【００３０】センターセンサ５０は図１に示してあるよ
うに、センサホルダ６２により保持し、内容器５の底部
５ｂと囲い壁３２との中央に形成した筒７１内にばね６
３により上方への突出習性を与えて設けられ、内鍋２が
器体１内に嵌め込まれたときセンサホルダ６２が所定量
下動されることにより、センターセンサ５０が内鍋２の
底部下面に密着するようになっている。またセンサホル
ダ６２が上方への突出状態にあるか、内鍋２によって下
動された状態にあるかを、センサホルダ６２の両側にあ
るマグネット６５およびリードスイッチ６４間が、筒７
１の下端に取付けた蓋部材７２から立設された遮蔽板７
３によって遮蔽されるか、この遮蔽を解除されるかによ
って検出するようになっている。この検出信号はマイク
ロコンピュータ５７に入力され、この信号の有無によて
内鍋２の装着、未装着が判別される。未装着の判別時に
はワークコイル３、胴部ヒータ２１および蓋ヒータ３５
への通電を阻止し、内鍋２を装着すべき表示等の警告を
行うようにする。As shown in FIG. 1, the center sensor 50 is held by a sensor holder 62, and a spring 6 is placed in a cylinder 71 formed at the center between the bottom 5b of the inner container 5 and the surrounding wall 32.
3, the center sensor 50 is moved downward by a predetermined amount when the inner pot 2 is fitted into the body 1, so that the center sensor 50 is attached to the lower surface of the bottom of the inner pot 2. It comes into close contact. Whether the sensor holder 62 is in a protruding state upward or moved down by the inner pot 2 is determined by the gap between the magnet 65 and the reed switch 64 on both sides of the sensor holder 62.
The shield plate 7 erected from the lid member 72 attached to the lower end of
3, the detection is made depending on whether the light is shielded or released. The detection signal is input to the microcomputer 57, and it is determined whether the inner pan 2 is attached or not according to the presence or absence of the signal. At the time of discrimination of non-attachment, the work coil 3, the body heater 21, and the lid heater 35
The power supply to the inner pan 2 is prevented, and a warning such as a display to mount the inner pot 2 is issued.
【００３１】また、前記交流電源５５は、整流回路５８
を介してワークコイル３およびこれの共振回路５９が接
続され、共振回路５９の動作周波数をマイクロコンピュ
ータ５７からの指令信号通りに変更する周波数変更回路
６１が接続されている。The AC power supply 55 includes a rectifier circuit 58.
The work coil 3 and the resonance circuit 59 thereof are connected via the control circuit, and a frequency changing circuit 61 for changing the operating frequency of the resonance circuit 59 in accordance with a command signal from the microcomputer 57 is connected.
【００３２】これによって、炊飯時はワークコイル３の
みを高容量で通電することにより、炊飯に十分な発熱を
得て首尾よく炊きあげることができる。[0032] With this arrangement, when the rice is cooked, only the work coil 3 is energized with a high capacity, so that sufficient heat is generated for the rice and the rice can be cooked successfully.
【００３３】保温はワークコイル３の低容量通電と、胴
部ヒータ２１および蓋ヒータ３５への通電との組み合わ
せによって、前記温度差なく首尾よく保温できるように
する。In order to maintain the temperature, a combination of the low-capacity energization of the work coil 3 and the energization of the body heater 21 and the lid heater 35 enables the temperature to be successfully maintained without the temperature difference.
【００３４】ところで本実施例では、器体１内の内鍋２
をワークコイル３からの電磁誘導による発熱させる炊飯
操作工程の過程にて、内鍋２と当接し合ってこの内鍋の
温度を検出するセンターセンサ５０の検出温度が、基準
温度よりも低い異常検出状態をマイクロコンピュータ５
７の判別機能により検出するようにしてある。In this embodiment, the inner pan 2 in the vessel 1 is
In the course of the rice cooking operation step in which the heat is generated by electromagnetic induction from the work coil 3, the temperature detected by the center sensor 50 which comes into contact with the inner pot 2 and detects the temperature of the inner pot is lower than the reference temperature. Microcomputer 5
7 is used for the detection.
【００３５】したがって、内鍋２をフルパワーで発熱さ
せる炊飯操作工程の過程において、内鍋２と当接し合っ
てこの内鍋２の温度を検出するセンターセンサ５０と内
鍋２との間に米粒等の異物が挟まっている場合、内鍋２
はワークコイル３からの電磁誘導によりそれ自体が発熱
されるが、センターセンサ５０は内鍋２からの熱伝導を
妨げられて内鍋２の温度を実際よりも低く検出してしま
うことがある。この場合でも、センターセンサ５０の検
出温度が、基準温度よりも低い異常状態であることをマ
イクロコンピュータ５７によって検出することができ、
この検出結果に基づいて種々に対策されうる。この異常
状態の検出を、内鍋をフルパワーで発熱させる炊飯操作
工程の過程に行うと、温度センサと内鍋との間に異物の
挟みこみがある場合、温度センサの検出温度と内鍋の実
際の温度との開きが大きくなるので、異常状態の検出が
より確実に行える。Therefore, in the course of the rice cooking operation process in which the inner pot 2 generates heat with full power, rice grains are placed between the center sensor 50 which comes into contact with the inner pot 2 and detects the temperature of the inner pot 2 and the inner pot 2. When foreign objects such as
Is heated by electromagnetic induction from the work coil 3 itself, but the center sensor 50 may detect the temperature of the inner pan 2 lower than the actual temperature because the heat conduction from the inner pan 2 is hindered. Also in this case, the microcomputer 57 can detect that the detected temperature of the center sensor 50 is in an abnormal state lower than the reference temperature by the microcomputer 57,
Various measures can be taken based on this detection result. The rice cooking operation that makes the inner pot generate heat with full power
In the course of the process , if there is a foreign substance caught between the temperature sensor and the inner pot, the difference between the detected temperature of the temperature sensor and the actual temperature of the inner pot becomes larger, so the detection of abnormal state becomes more It can be done reliably.
【００３６】また、本実施例では、器体１内の内鍋２を
ワークコイル３からの電磁誘導により発熱させる炊飯操
作工程の過程にて、内鍋２と当接し合ってこの内鍋２の
温度を検出するセンターセンサ５０の検出温度に対す
る、器体１の蓋体１２の内側に位置して内鍋２に当てが
われてそれを蓋する内蓋１４の蓋温度センサ７０による
検出温度との温度差により、内鍋２とセンターセンサ５
０との間に異物が挟まって生じた異常昇温を、マイクロ
コンピュータ５７の判別機能により検出するようにして
ある。In the present embodiment, in the course of the rice cooking operation step in which the inner pot 2 in the container 1 is heated by electromagnetic induction from the work coil 3, the inner pot 2 comes into contact with the inner pot 2 and The difference between the temperature detected by the center sensor 50 for detecting the temperature and the temperature detected by the lid temperature sensor 70 of the inner lid 14 which is located inside the lid 12 of the container 1 and is applied to the inner pan 2 to cover it. Due to the temperature difference, inner pot 2 and center sensor 5
An abnormal temperature rise caused by a foreign substance being caught between 0 and 0 is detected by the discriminating function of the microcomputer 57.
【００３７】通常、器体１内の内鍋２を電磁誘導により
発熱させる炊飯操作工程の過程にて、内鍋２と当接し合
ってこの内鍋２の温度を検出するセンターセンサ５０は
次第に昇温する内鍋２の温度を検出し、内鍋２からの熱
伝導および内容物が沸騰するときに発生する蒸気によっ
て昇温する内蓋１４の温度と、前記センターセンサ５０
による内鍋２の検出温度との差を検出する。この場合、
センターセンサ５０と内鍋２との間に異物が挟まってい
るようなとき、センターセンサ５０による内鍋２の検出
温度は実際の内鍋２の温度よりも低くなるので、検出温
度と内蓋１４の温度との差は前記所定の範囲よりも小さ
くなる。また、内鍋２の温度が沸騰温度に達する前に内
蓋１４の温度が沸騰温度に達することから、前記構成に
てマイクロコンピュータ５７はどの温度域の炊飯過程で
も、内蓋１４の異常昇温を、センターセンサ５０の検出
温度と蓋温度センサ７０の検出温度とから、適正に検出
することができる。Normally, in the course of the rice cooking operation step in which the inner pot 2 in the vessel 1 is heated by electromagnetic induction, the center sensor 50 which comes into contact with the inner pot 2 and detects the temperature of the inner pot 2 gradually rises. The temperature of the inner lid 14 is detected by detecting the temperature of the inner pan 2 to be heated, and the temperature of the inner lid 14 is increased by the heat generated from the inner pan 2 and the steam generated when the contents are boiled.
Is detected from the detected temperature of the inner pan 2 due to the above. in this case,
When a foreign object is sandwiched between the center sensor 50 and the inner pot 2, the detected temperature of the inner pot 2 by the center sensor 50 is lower than the actual temperature of the inner pot 2. Is smaller than the predetermined range. In addition, since the temperature of the inner lid 14 reaches the boiling temperature before the temperature of the inner pan 2 reaches the boiling temperature, the microcomputer 57 in the above-described configuration allows the microcomputer 57 to raise the abnormal temperature of the inner lid 14 in any temperature range of the rice cooking process. Can be properly detected from the temperature detected by the center sensor 50 and the temperature detected by the lid temperature sensor 70.
【００３８】このように本実施例は、マイクロコンピュ
ータ５７によってセンターセンサ５０の異常状態と、こ
れに関連した内蓋１４の蓋温度センサ７０により異常昇
温状態との２通りの検出を行って、そのどちらかの検出
があればセンターセンサ５０の異物による検出異常を検
出するので、検出の精度と確実性を向上することができ
る。As described above, in the present embodiment, the microcomputer 57 performs two kinds of detections, that is, the abnormal state of the center sensor 50 and the abnormal temperature rise state by the lid temperature sensor 70 of the inner lid 14 related thereto. If any one of the detections is detected, the detection abnormality of the center sensor 50 due to the foreign matter is detected, so that the detection accuracy and reliability can be improved.
【００３９】なお、前記異物による異常検出結果に基づ
く処理として、初期加熱状態時であれば、内鍋２の発熱
操作を停止するようにすると、それ以降も炊飯操作が無
駄に行われることや、炊飯操作の続行による問題を防止
することができ、炊き上げ状態時であれば、炊飯の早期
終了を強制的に図るようにすると、誤検出による影響少
なく御飯を炊き上げてしまい、それまでの炊飯が無駄に
ならないようにすることができる。If the heating operation of the inner pot 2 is stopped in the initial heating state as a process based on the result of the abnormality detection due to the foreign matter, the rice cooking operation is uselessly performed thereafter. It is possible to prevent problems caused by continuation of the rice cooking operation, and if the rice is in a cooked state, forcibly terminating the rice at an early stage, the rice will be cooked with less influence due to erroneous detection, and the rice cooked until then. Is not wasted.
【００４０】さらに、前記各安全処理と同時に、警告を
も行うようにすると、安全処理が行われたことを使用者
等に告知することができ、必要な措置を促したり、御飯
が炊けても安全処理による不満足なものであることを理
解させることができる。Further, if a warning is also issued at the same time as each of the above-mentioned safety processes, it is possible to notify the user or the like that the safety process has been performed, to prompt necessary measures or to cook rice. It can be understood that the safety process is not satisfactory.
【００４１】図３〜図５のフローチャートは、本実施例
での異常昇温検出とこれに基づく安全処理の具体的な制
御例を示している。The flowcharts of FIGS. 3 to 5 show specific examples of control of abnormal temperature rise detection and safety processing based on this in this embodiment.
【００４２】図３では、低温域での吸水炊飯操作工程
後、主としてワークコイル３のフルパワー通電による初
期加熱を、センターセンサ５０の検出温度がＴ０ ℃に
達するまでと、Ｔ０ ℃に達した後は、１２秒単位で、
１５回行い、センターセンサ５０の検出温度がＴ０ ℃
に達する前に内蓋１４が８０℃を越えている場合、ステ
ップＳ１にてこれを異常昇温と判別し、ステップＳ２に
移行してブザー動作信号を発信し、異常を知らせるとと
もに、ステップＣに進み、加熱の停止と初期モードへの
復帰と云った安全処理を行う。In FIG. 3, after the water-absorbing rice-cooking operation step in the low-temperature region, the initial heating of the work coil 3 mainly by full power supply is performed until the temperature detected by the center sensor 50 reaches T0 ° C. Is in units of 12 seconds,
15 times, the temperature detected by the center sensor 50 is T0 ° C.
If the temperature of the inner lid 14 is higher than 80 ° C. before the temperature reaches the predetermined temperature, it is determined in step S1 that the temperature is abnormally high. Then, safety processing such as stopping heating and returning to the initial mode is performed.
【００４３】後の１５回分の初期加熱では、ステップＳ
３、Ｓ４にて、センターセンサ５０の検出温度が１００
℃以下であるのに、蓋温度センサ７０が８０℃異常を検
出している場合に、内蓋１４の異常昇温として判別し、
この場合もステップＳ２、Ｃに移行し、警告と安全処理
を行う。In the subsequent initial heating for 15 times, step S
3. In S4, the detected temperature of the center sensor 50 becomes 100
If the temperature of the inner lid 14 is below 80 ° C., but the lid temperature sensor 70 has detected an abnormal 80 ° C.
Also in this case, the process proceeds to steps S2 and C, and a warning and a safety process are performed.
【００４４】初期加熱終了時は、ステップＳ５にてメニ
ューが炊き込み御飯であるかどうかの確認をした後、こ
れに応じたフローに移行する。At the end of the initial heating, in step S5, it is confirmed whether the menu is cooked rice, and then the flow shifts to a corresponding flow.
【００４５】本実施例では図４、図５に示すフローのブ
ロックＢ１にて、合数等の違いによる炊飯の進行度合い
の違い、つまりセンターセンサ５０により検出している
炊飯温度の違いに応じた炊き上げ炊飯操作工程の必要時
間を得てこれを設定し、また次のブロックＢ２にて、前
記炊き上げ炊飯操作工程の必要時間での、白米硬めかど
うか、寿司飯かどうか、のメニューの違いに応じたワー
クコイル３の通電条件を設定した上で、この通電条件で
のワークコイル３の通電をブロックＢ３にて、また胴部
ヒータ２１および蓋ヒータ３５の前記違いに応じた通電
条件での通電を次のブロックＢ４にて、それぞれ、前記
設定時間分だけ繰り返し行って、炊き上げ炊飯操作工程
を実行する。In this embodiment, in block B1 of the flow shown in FIGS. 4 and 5, the degree of progress of rice cooking due to the difference in the number of sums, that is, the difference in the rice cooking temperature detected by the center sensor 50 is determined. The required time for the cooked rice cooking operation process is obtained and set, and in the next block B2, the difference in the menu for the required time of the cooked rice cooking operation process, whether it is harder than white rice or whether it is sushi rice. After the energization conditions of the work coil 3 are set according to the energization conditions, the energization of the work coil 3 under the energization conditions is performed by the block B3, and the energization conditions according to the difference between the body heater 21 and the lid heater 35 are set. The energization is repeated in the next block B4 for the set time, respectively, to execute the cooking and cooking operation process.
【００４６】この炊き上げ炊飯操作工程が終了すると、
ブロックＢ４の通電を、ステップＳ６またはＳ７にて所
定の温度例えば１３０℃になるまで、あるいはステップ
Ｓ８にて総炊飯時間Ｚ秒が経過するまで、蒸らし炊飯操
作を実行し、これが終了するとステップＹの炊飯終了操
作に移行し、炊飯を終える。When the cooking and cooking operation process is completed,
The energization of the block B4 is performed until the predetermined temperature, for example, 130 ° C., is reached in step S6 or S7, or until the total rice cooking time Z seconds has elapsed in step S8. It shifts to the rice cooking end operation and finishes the rice cooking.
【００４７】ここで、前記炊き上げ炊飯操作や蒸らし炊
飯操作が繰り返し行われる過程に設けたブロックＢ５に
て、センターセンサ５０によって検出している炊飯温度
が１０５℃に達して以降、３５秒経過しても炊飯温度が
１１０℃を越えるかどうかを見、越えていなければセン
ターセンサ５０が異物の挟まりによって内鍋２の温度を
的確に検出できていないものと判断できるので、以降の
炊飯操作工程の早期終了を強制的に図るようにしてい
る。Here, 35 seconds have passed since the rice cooking temperature detected by the center sensor 50 reached 105 ° C. in the block B5 provided in the process of repeatedly performing the cooking rice cooking operation and the steaming rice cooking operation. Even if the rice cooking temperature exceeds 110 ° C., the center sensor 50 can determine that the temperature of the inner pot 2 has not been accurately detected due to the foreign substance being caught. Early termination is forcibly attempted.
【００４８】１５０℃を検出してから３５秒間は異物検
出メモリーをセットし、この間のみワークコイル３を連
続して通電、つまりフルパワー通電し、正常な炊飯との
差が生じやすくしている。A foreign object detection memory is set for 35 seconds after the detection of 150 ° C., and only during this time, the work coil 3 is continuously energized, that is, full power is energized, so that a difference from normal rice cooking is likely to occur.
【００４９】図６、図７は本発明の第２の実施例を示
し、図４、図５に示す制御とほぼ同様な炊き上げ炊飯操
作工程および蒸らし炊飯操作工程を行っているが、ブロ
ックＢ５では、ステップＳ１１、Ｓ１２にて、センター
センサ５０の検出温度が１００℃以下であるのに、蓋温
度センサ７０が８０℃異常を検出している場合に、内蓋
１４の異常昇温とし判別し、ステップＳ１３、Ｃに移行
し、警告と安全処理を行う。FIGS. 6 and 7 show a second embodiment of the present invention, in which a cooked rice-cooking operation step and a steamed rice-cooking operation step substantially similar to the control shown in FIGS. 4 and 5 are performed. Then, in steps S11 and S12, if the temperature of the center sensor 50 is 100 ° C. or less and the lid temperature sensor 70 detects an abnormality of 80 ° C., it is determined that the temperature of the inner lid 14 is abnormally high. Then, the process proceeds to steps S13 and C to perform a warning and a safety process.
【００５０】また、第１の実施例で説明したように、セ
ンターセンサ５０によって検出している炊飯温度が１０
５℃に達して以降、３５秒経過しても炊飯温度が１１０
℃を越えるかどうかをステップＳ２１〜Ｓ２５で見、越
えていなければセンターセンサ５０が異物の挟まりによ
って内鍋２の温度を的確に検出できていないものと判断
できることにより、ステップＹに以降していきなり炊飯
終了処理を行うようにしている。Further, as described in the first embodiment, the rice cooking temperature detected by the center sensor 50 becomes 10%.
After reaching 5 ° C, rice cooking temperature is 110 even after 35 seconds.
If the temperature does not exceed ° C in steps S21 to S25, and if not, the center sensor 50 can judge that the temperature of the inner pot 2 has not been accurately detected due to the foreign matter being caught, so that the process proceeds to step Y. The rice cooking end processing is performed.
【００５１】[0051]
【発明の効果】本発明の炊飯器の異常検出装置の第１の
特徴によれば、内鍋を加熱手段がワークコイルからの電
磁誘導により発熱させる炊飯操作工程の過程において、
内鍋と当接し合ってこの内鍋の温度を検出する内鍋温度
センサと、前記内鍋との間に、米粒等の異物が挟まって
いる場合、内鍋はワークイルからの電磁誘導によりそれ
自体が発熱されるが、内鍋温度センサは内鍋からの熱伝
導を妨げられ、内鍋の温度を実際よりも低く検出してし
まうことがある。この場合でも、内鍋温度センサの検出
温度が、基準温度よりも低いことにより、内鍋と内鍋温
度センサとの間に異物が挟まった異常状態であることを
検出手段によって検出することができる。この異常状態
の検出を、内鍋をフルパワーで発熱させる炊飯操作工程
の過程に行うと、温度センサと内鍋との間に異物の挟み
こみがある場合、温度センサの検出温度と内鍋の実際の
温度との開きが大きくなるので、異常検出状態の検出が
より確実に行える。According to the first feature of the rice cooker abnormality detecting device of the present invention, in the process of the rice cooking operation step in which the heating means heats the inner pot by electromagnetic induction from the work coil.
When a foreign matter such as rice grains is interposed between the inner pot temperature sensor that contacts the inner pot and detects the temperature of the inner pot, and the inner pot, the inner pot itself is electromagnetically induced from the workoil. Is generated, but heat conduction from the inner pot is hindered, and the temperature of the inner pot may be detected lower than the actual temperature. Also in this case, since the detected temperature of the inner pot temperature sensor is lower than the reference temperature, it is possible to detect by the detecting means that an abnormal state in which a foreign object is caught between the inner pot and the inner pot temperature sensor. . The rice cooking operation process that detects the abnormal state by heating the inner pot with full power
Doing the process, if between the temperature sensor and the inner bowl is nipping of the foreign matter, the opening of the actual temperature of the detected temperature and the inner pot temperature sensor increases, more the detection of the abnormality detection state It can be done reliably.
【００５２】また、本発明の炊飯器の異常検出装置の第
２の特徴によれば、器体内の内鍋を加熱手段がワークコ
イルからの電磁誘導により発熱させる炊飯操作工程の過
程にて、内鍋と当接し合ってこの内鍋の温度を検出する
内鍋温度センサは次第に昇温する内鍋の温度を検出し、
内蓋の温度を検出する蓋温度センサによる内蓋の検出温
度と、内鍋温度センサによる内鍋の検出温度との差を検
出する。この場合、内鍋温度センサと内鍋との間に異物
が挟まっているようなとき、内鍋温度センサによる内鍋
の検出温度は実際の内鍋の温度よりも低くなるので、内
鍋温度センサの検出温度と蓋温度センサの検出温度との
差は前記所定の範囲と異なることにより、内鍋温度セン
サと内鍋との間に異物が挟まっていることによる内蓋の
異常昇温を検出することができる。According to a second feature of the rice cooker abnormality detecting device of the present invention, the heating means heats the inner pot in the body by electromagnetic induction from the work coil. The inner pot temperature sensor that contacts the pot and detects the temperature of this inner pot detects the temperature of the inner pot that gradually rises in temperature,
The difference between the detected temperature of the inner lid by the lid temperature sensor that detects the temperature of the inner lid and the detected temperature of the inner pan by the inner pot temperature sensor is detected. In this case, when foreign matter is sandwiched between the inner pot temperature sensor and the inner pot, the detected temperature of the inner pot by the inner pot temperature sensor becomes lower than the actual temperature of the inner pot. The difference between the detected temperature of the inner lid and the detected temperature of the lid temperature sensor is different from the predetermined range, thereby detecting an abnormal rise in the temperature of the inner lid due to a foreign object being interposed between the inner pan temperature sensor and the inner pan. be able to.
【００５３】本発明の炊飯器の異常検出装置の第３の特
徴によれば、第１の特徴における検出手段による場合と
同様な異常状態を得る第１の検出手段による検出機能
と、第２の特徴における検出手段による場合と同様な内
蓋の異常昇温状態を得る第２の検出手段による検出機能
との、いずれかによって、温度センサの異常検出状態を
より適正に検出することができ、検出の精度と確実性を
向上することができる。According to a third feature of the rice cooker abnormality detection device of the present invention, a detection function by the first detection means for obtaining the same abnormal state as that by the detection means in the first characteristic, and a second function. The detection function by the second detection means for obtaining the same abnormal temperature rise state of the inner lid as that by the detection means in the feature, the abnormality detection state of the temperature sensor can be detected more appropriately. Accuracy and reliability can be improved.
【図１】本発明の第１の実施例を示す炊飯器の断面図で
ある。FIG. 1 is a sectional view of a rice cooker showing a first embodiment of the present invention.
【図２】図１の炊飯器の制御回路図である。FIG. 2 is a control circuit diagram of the rice cooker of FIG. 1;
【図３】図１の炊飯器の初期炊飯操作の主な制御動作を
示すフローチャートである。FIG. 3 is a flowchart showing a main control operation of an initial rice cooking operation of the rice cooker of FIG. 1;
【図４】図１の炊飯器の炊き上げ炊飯操作の主な制御動
作の前半部を示すフローチャートである。FIG. 4 is a flowchart showing a first half of a main control operation of a rice cooking operation of the rice cooker of FIG. 1;
【図５】図１の炊飯器の炊き上げ炊飯操作の主な制御動
作の後半部を示すフローチャートである。FIG. 5 is a flowchart showing the latter half of the main control operation of the rice cooking operation of the rice cooker of FIG. 1;
【図６】本発明の第２の実施例を示す炊飯器の炊き上げ
操作の主な制御動作の前半部を示すフローチャートであ
る。FIG. 6 is a flowchart illustrating a first half of a main control operation of a rice cooker according to a second embodiment of the present invention.
【図７】本発明の第２の実施例を示す炊飯器の炊き上げ
操作の主な制御動作の後半部を示すフローチャートであ
る。FIG. 7 is a flowchart showing the second half of the main control operation of the rice cooker according to the second embodiment of the present invention.
【図８】正常炊飯時の内鍋のセンサ検出温度と内蓋温度
との関係を示すグラフである。FIG. 8 is a graph showing the relationship between the temperature detected by the sensor of the inner pot and the temperature of the inner lid during normal rice cooking.
【図９】異物炊飯時の内鍋のセンサ検出温度と内蓋温度
との関係を示すグラフである。FIG. 9 is a graph showing the relationship between the temperature detected by the sensor of the inner pot and the temperature of the inner lid during cooking of foreign objects.
１ 器体 ２ 内鍋 ３ ワークコイル １２ 蓋体 １４ 内蓋 ５０ センターセンサ ７０ 蓋温度センサ ５７ マイクロコンピュータ DESCRIPTION OF SYMBOLS 1 Instrument body 2 Inner pan 3 Work coil 12 Lid 14 Inner lid 50 Center sensor 70 Lid temperature sensor 57 Microcomputer
Claims (3)
出する内鍋温度センサと、器体内の内鍋をワークコイル
からの電磁誘導により発熱させる加熱手段と、内鍋をフ
ルパワーで発熱させる炊飯操作工程の過程での内鍋温度
センサによる検出温度が、基準温度よりも低いことによ
り、内鍋と内鍋温度センサとの間に異物が挟まった異常
状態を検出する検出手段とを備えたことを特徴とする炊
飯器の異常検出装置。1. An inner pot temperature sensor for coming into contact with an inner pot to detect the temperature of the inner pot, heating means for heating the inner pot in the body by electromagnetic induction from a work coil, and an inner pot for heating.
Detecting means for detecting an abnormal state in which a foreign object is caught between the inner pot and the inner pot temperature sensor because the temperature detected by the inner pot temperature sensor in the process of the rice cooking operation process that generates heat with less power is lower than the reference temperature. An abnormality detection device for a rice cooker, comprising:
出する内鍋温度センサと、内鍋を蓋する内蓋の温度を検
出する蓋温度センサと、器体内の内鍋をワークコイルか
らの電磁誘導により発熱させる加熱手段と、炊飯操作工
程の過程での内鍋温度センサによる検出温度に対する、
蓋温度センサによる検出温度との温度差により、内鍋と
内鍋温度センサとの間に異物が挟まって生じた異常昇温
を検出する検出手段とを備えたことを特徴とする炊飯器
の異常検出装置。2. An inner pot temperature sensor for abutting the inner pot to detect the temperature of the inner pot, a lid temperature sensor for detecting a temperature of an inner lid that covers the inner pot, and a work piece for the inner pot in the container. Heating means for generating heat by electromagnetic induction from the coil, and the temperature detected by the inner pot temperature sensor in the process of the rice cooking operation process,
An abnormality in the rice cooker, comprising: detecting means for detecting an abnormal temperature rise caused by a foreign substance being caught between the inner pot and the inner pot temperature sensor due to a temperature difference from a temperature detected by the lid temperature sensor. Detection device.
出する内鍋温度センサと、器体内の内鍋をワークコイル
からの電磁誘導により発熱させる加熱手段と、内鍋をフ
ルパワーで発熱させる炊飯操作工程の過程での内鍋温度
センサによる検出温度が、基準温度よりも低いことによ
り、内鍋と内鍋温度センサとの間に異物が挟まった異常
状態を検出する第１の検出手段と、内鍋を蓋する内蓋の
温度を検出する蓋温度センサと、炊飯操作工程の過程で
の内鍋温度センサによる検出温度に対する、蓋温度セン
サによる検出温度との温度差により、内鍋と内鍋温度セ
ンサとの間に異物が挟まって生じた異常昇温を検出する
第２の検出手段とを備え、第１、第２の各検出手段のど
ちらの検出があっても内鍋と内鍋温度センサとの間に異
物が挟まった異常状態を検出することを特徴とする炊飯
器の異常検出装置。3. An inner pot temperature sensor for coming into contact with the inner pot to detect the temperature of the inner pot, heating means for heating the inner pot in the container by electromagnetic induction from a work coil, and
The first temperature for detecting an abnormal state in which a foreign object is caught between the inner pot and the inner pot temperature sensor because the temperature detected by the inner pot temperature sensor in the process of the rice cooking operation step of generating heat with less power is lower than the reference temperature. Detection means, a lid temperature sensor that detects the temperature of the inner lid that covers the inner pot, and in the course of the rice cooking operation process
A second detecting means for detecting an abnormal temperature rise caused by a foreign substance being caught between the inner pot and the inner pot temperature sensor based on a temperature difference between the temperature detected by the inner pot temperature sensor and the temperature detected by the lid temperature sensor. Abnormality in a rice cooker, wherein an abnormal state in which a foreign object is caught between the inner pot and the inner pot temperature sensor is detected regardless of which of the first and second detecting means detects Detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06149968A JP3107185B2 (en) | 1994-06-30 | 1994-06-30 | Rice cooker abnormality detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06149968A JP3107185B2 (en) | 1994-06-30 | 1994-06-30 | Rice cooker abnormality detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0810159A JPH0810159A (en) | 1996-01-16 |
| JP3107185B2 true JP3107185B2 (en) | 2000-11-06 |
Family
ID=15486560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06149968A Expired - Fee Related JP3107185B2 (en) | 1994-06-30 | 1994-06-30 | Rice cooker abnormality detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3107185B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5072837A (en) * | 1987-09-24 | 1991-12-17 | Roesch Wilhelm | Hinged multiple garment hanger |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59141910A (en) * | 1983-02-01 | 1984-08-14 | 三菱電機株式会社 | Rice cooker |
| JP2683959B2 (en) * | 1991-03-12 | 1997-12-03 | 三菱電機株式会社 | Rotary cooker |
| JP2888700B2 (en) * | 1992-06-05 | 1999-05-10 | 松下電器産業株式会社 | rice cooker |
-
1994
- 1994-06-30 JP JP06149968A patent/JP3107185B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0810159A (en) | 1996-01-16 |
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