JPH0662955A - Rice boiler - Google Patents
Rice boilerInfo
- Publication number
- JPH0662955A JPH0662955A JP21763192A JP21763192A JPH0662955A JP H0662955 A JPH0662955 A JP H0662955A JP 21763192 A JP21763192 A JP 21763192A JP 21763192 A JP21763192 A JP 21763192A JP H0662955 A JPH0662955 A JP H0662955A
- Authority
- JP
- Japan
- Prior art keywords
- rice
- temperature
- amount
- heating
- inner pot
- 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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Links
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Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、炊飯器に係わり、さら
に詳しくは電磁誘導作用により炊飯容器を誘導加熱する
炊飯器に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice cooker, and more particularly to a rice cooker that induction-heats a rice cooker container by electromagnetic induction.
【0002】[0002]
【従来の技術】従来のこの種の炊飯器の構成例を、図7
に示す。図7において、eは商用の交流電源、HとSは
交流電源eに直列に接続された炊飯ヒータとリレースイ
ッチである。リレースイッチSはコイルSc と常開接点
Ss とからなり、コイルSc が励磁されると接点Ss が
閉成を保持して炊飯ヒータHが通電する。交流電源e
は、炊飯ヒータHに一定の電力を供給する。Tr はスイ
ッチング素子、Vccは駆動用の直流の定電圧電源、rは
保護抵抗、Mc はマイクロコンピュータ(以下マイコ
ン)である。2. Description of the Related Art An example of the configuration of a conventional rice cooker of this type is shown in FIG.
Shown in. In FIG. 7, e is a commercial AC power source, and H and S are a rice cooking heater and a relay switch connected in series to the AC power source e. The relay switch S comprises a coil Sc and a normally open contact Ss. When the coil Sc is excited, the contact Ss is kept closed and the rice cooking heater H is energized. AC power supply e
Supplies a constant power to the rice cooking heater H. Tr is a switching element, Vcc is a direct current constant voltage power source for driving, r is a protection resistor, and Mc is a microcomputer (hereinafter referred to as a microcomputer).
【0003】このような構成の従来の炊飯器のにおい
て、炊飯が開始するとマイコンMc の2値信号によりト
ランジスタTr を導通及び非導通にさせる。トランジス
タTrが導通するとリレースイッチSがオンになり、非
導通のときはオフになる。この結果、マイコンMc によ
って、炊飯ヒータHの通電時間がオン・オフ的に制御さ
れて炊飯が行われるようになっている。In the conventional rice cooker having such a structure, when rice cooking is started, the transistor Tr is turned on and off by a binary signal of the microcomputer Mc. When the transistor Tr is conducting, the relay switch S is turned on, and when it is not conducting, it is turned off. As a result, the microcomputer Mc controls the energization time of the rice cooking heater H to be turned on / off to cook rice.
【0004】[0004]
【発明が解決しようとする課題】従来の炊飯器は上記の
ように、リレースイッチSのオン・オフ動作によって炊
飯ヒータHの加熱量を制御するような構成が採用されて
いる。したがって、炊飯開始から沸騰するまで一定の電
力で加熱するために、炊飯量により加熱時間が異なり御
飯の炊き上がりに差ができることになる。また、リレー
スイッチSのオン・オフ動作によって接点Ss が摩耗し
て故障を生じるばかりか、炊飯ヒータHの加熱量を緻密
に制御することが不可能で炊飯精度を高めることができ
ない等の問題点があった。As described above, the conventional rice cooker has a structure in which the heating amount of the rice cooking heater H is controlled by the ON / OFF operation of the relay switch S. Therefore, since the rice is heated with a constant electric power from the start of cooking to the boiling, the heating time varies depending on the amount of cooked rice, and there is a difference in the cooked rice. In addition, the contact Ss is worn by the ON / OFF operation of the relay switch S to cause a failure, and it is impossible to precisely control the heating amount of the rice cooking heater H and the rice cooking accuracy cannot be improved. was there.
【0005】本発明は、このような従来の炊飯器の問題
点を解決するために成されたもので、炊飯量の変化に無
関係に加熱時間を一定にして、加熱量を炊飯量に正確に
対応させると共に、温度検出器の検出温度を理想的な炊
飯加熱温度と比較しながら加熱を行う加熱量制御手段を
備えた炊飯器を実現するようにしたものである。The present invention has been made to solve the problems of the conventional rice cooker, and the heating time is kept constant regardless of the change in the amount of cooked rice so that the amount of cooked rice accurately corresponds to the amount of cooked rice. In addition, the rice cooker is provided with a heating amount control means for performing heating while comparing the detected temperature of the temperature detector with an ideal rice cooking heating temperature.
【0006】[0006]
【課題を解決するための手段】この発明は、内釜を誘導
加熱する加熱コイルと、加熱コイルに高周波電流を供給
する電流供給手段と、内釜の炊飯温度を検出する温度検
出手段と、内釜内で炊飯される御飯の理想的な炊飯温度
曲線を記憶する温度記憶手段と、温度記憶手段に記憶さ
れた炊飯温度曲線と炊飯温度検出手段の検出温度とを比
較する温度比較手段と、温度比較手段の比較に基づいて
加熱コイルに供給される電流量を調節して内釜を加熱す
る加熱量を制御する加熱量制御手段とを備え、加熱量制
御手段により温度比較手段の比較に基づいて電流供給手
段から加熱コイルに供給される電流量を温度記憶手段に
記憶された温度曲線に一致させるように加熱量制御手段
を制御する炊飯器を構成したものである。The present invention relates to a heating coil for inductively heating an inner pot, a current supply unit for supplying a high-frequency current to the heating coil, a temperature detecting unit for detecting a rice cooking temperature of the inner pot, and Temperature storage means for storing an ideal rice-cooking temperature curve of cooked rice in the kettle; temperature comparison means for comparing the rice-cooking temperature curve stored in the temperature storage means with the temperature detected by the rice-cooking temperature detecting means; A heating amount control means for controlling the heating amount for heating the inner pot by adjusting the amount of current supplied to the heating coil based on the comparison of the comparison means, and based on the comparison of the temperature comparison means by the heating amount control means. The rice cooker is configured to control the heating amount control unit so that the amount of current supplied from the current supply unit to the heating coil matches the temperature curve stored in the temperature storage unit.
【0007】また、この発明は、内釜を誘導加熱する加
熱コイルと、加熱コイルに高周波電流を供給する電流供
給手段と、内釜の炊飯温度を検出する温度検出手段と、
内釜内で炊飯される御飯の固さの理想的な炊飯温度曲線
を記憶する温度記憶手段と、温度記憶手段に記憶された
御飯の固さに対応する炊飯温度曲線と前記温度検出手段
の検出温度とを比較する温度比較手段と、加熱コイルに
供給される電流量を調節して前記内釜を加熱する加熱量
を制御する加熱量制御手段とを備え、加熱量制御手段に
より温度比較手段の比較に基づいて電流供給手段から加
熱コイルに供給される電流量を温度記憶手段に記憶され
た理想的な御飯の固さの炊飯温度曲線に一致させるよう
に加熱量制御手段を制御する炊飯器を構成したものであ
る。Further, according to the present invention, a heating coil for induction heating the inner pot, a current supply means for supplying a high frequency current to the heating coil, and a temperature detecting means for detecting the rice cooking temperature of the inner pot.
Temperature storage means for storing an ideal rice-cooking temperature curve of the hardness of the rice cooked in the inner pot, rice-cooking temperature curve corresponding to the hardness of the rice stored in the temperature storage means, and detection of the temperature detection means The temperature comparing means for comparing the temperature and the heating amount controlling means for controlling the heating amount for heating the inner pot by adjusting the amount of current supplied to the heating coil are provided. Based on the comparison, a rice cooker that controls the heating amount control means to match the amount of current supplied from the current supply means to the heating coil with the ideal rice hardness temperature curve stored in the temperature storage means It is composed.
【0008】[0008]
【作用】予備炊飯が開始されて設定温度に達するとタイ
マがスタートして、上昇する炊飯温度の或る範囲内の経
過時間が計測されて温度勾配が求められる。求められた
温度勾配に基づいて炊飯量が判定され、内釜を誘導加熱
する加熱コイルに供給される電流量が設定される。When the pre-cooking rice is started and reaches the set temperature, the timer is started, and the elapsed time within a certain range of the rising rice cooking temperature is measured to obtain the temperature gradient. The amount of cooked rice is determined based on the obtained temperature gradient, and the amount of current supplied to the heating coil that induction-heats the inner pot is set.
【0009】一方、炊飯器の制御装置内には、炊飯の経
過時間に対する理想的な炊飯温度曲線がメモリされてい
る。そして、温度検出器で検出した検出温度が、メモリ
された理想的な炊飯温度曲線を示すカーブと一定時間毎
に比較される。比較の結果、温度差が正の場合は加熱量
制御手段が加熱コイルに供給される電流量を減少し、温
度差が負のときは供給電流量を増加する。この結果、内
釜内の炊飯量に対応して一定時間理想的な加熱が加えら
れて、美味しい御飯が炊き上げられる。On the other hand, the ideal rice cooking temperature curve with respect to the elapsed time of rice cooking is stored in the controller of the rice cooker. Then, the detected temperature detected by the temperature detector is compared with the stored curve showing the ideal rice cooking temperature curve at regular time intervals. As a result of the comparison, the heating amount control means decreases the amount of current supplied to the heating coil when the temperature difference is positive, and increases the amount of supplied current when the temperature difference is negative. As a result, ideal heating is added for a certain period of time according to the amount of rice cooked in the inner pot, and delicious rice is cooked.
【0010】同様にして、メモリされた例えば“普
通”、“軟らかめ”、“固め”の3段階の温度カーブ
が、温度検出器の検出温度と比較されて電流量が制御さ
れながら炊飯が進行する。炊飯動作が理想カーブに沿っ
てプログラム制御されて、好みの固さに炊き上げられた
御飯が茶碗に盛り付けられる。In the same manner, the cooked rice proceeds while controlling the current amount by comparing the stored temperature curves of three levels of "normal", "soft" and "solid" with the temperature detected by the temperature detector. To do. The rice cooking operation is program-controlled along the ideal curve, and the rice cooked to the desired hardness is served in a bowl.
【0011】[0011]
実施例1 図1は本発明の実施例の構成説明図で、図7と類似した
構成部分でも異なる符号が付されている。図1におい
て、1は炊飯器の本体である。2は炊飯容器をなす内
釜、3は内蓋、4はサーミスタのような温度センサ、5
は操作部である。内釜3は磁性体で作られ本体1内に取
出し自在に収容され、その底面に温度センサー5が弾性
的に接触している。そして、炊飯が開始すると温度セン
サ4により、常時内釜2内の炊飯温度が検出される。図
示を省略したが、操作部5には液晶表示器やLED等の
表示手段と、設定入力用のタッチキーが設けられてい
る。6は内釜2内の水、7は米である。Embodiment 1 FIG. 1 is an explanatory view of the structure of an embodiment of the present invention, in which the constituent parts similar to those in FIG. In FIG. 1, 1 is a main body of a rice cooker. 2 is an inner pot that forms a rice cooking container, 3 is an inner lid, 4 is a temperature sensor such as a thermistor, 5
Is an operation unit. The inner pot 3 is made of a magnetic material and is housed in the main body 1 so that it can be taken out freely, and the temperature sensor 5 is elastically in contact with the bottom surface thereof. When the rice cooking is started, the temperature sensor 4 constantly detects the rice cooking temperature in the inner pot 2. Although not shown, the operation unit 5 is provided with a display means such as a liquid crystal display or an LED, and a touch key for setting input. 6 is water in the inner pot 2 and 7 is rice.
【0012】8は商用電源、9は整流器、10と11は
コンデンサ、12は加熱コイル、13はスイッチング素
子である。商用電源8の交流電流は整流器9で整流さ
れ、コンデンサ10で平滑されて直流電流が出力端に出
力される。コンデンサ11は加熱コイルと並列に接続さ
れて、共振回路を構成している。14は商用電源8の出
力回路に設けられた入力電流検出手段、15と16はス
イッチング素子13のゲートと温度センサ4に接続され
た出力調整手段と温度検出手段である。Reference numeral 8 is a commercial power source, 9 is a rectifier, 10 and 11 are capacitors, 12 is a heating coil, and 13 is a switching element. The AC current of the commercial power source 8 is rectified by the rectifier 9, smoothed by the capacitor 10, and the DC current is output to the output end. The capacitor 11 is connected in parallel with the heating coil to form a resonance circuit. Reference numeral 14 is an input current detecting means provided in the output circuit of the commercial power supply 8, and 15 and 16 are an output adjusting means and a temperature detecting means connected to the gate of the switching element 13 and the temperature sensor 4.
【0013】20はマイコンである。21はマイコン2
0に設けられた固さ設定手段、22は温度上昇率記憶手
段、23は温度比較手段である。固さ設定手段21は炊
き上がり御飯の固さを、例えば“軟らかめ”と“普通”
及び“固め”の3段階に設定される。24と25は温度
検出手段16の出力側に接続されタイマや演算機能を備
えた温度上昇率検出手段と炊飯量判定手段、26は沸騰
検出手段である。炊飯量判定手段25は温度上昇率検出
手段24で検出した炊飯温度の一定時間内の上昇率、即
ち温度勾配から内釜3内の御飯の炊飯量を判定する。ま
た、沸騰検出手段26は、温度検出手段16の検出温度
の沸騰点を検出する。Reference numeral 20 is a microcomputer. 21 is a microcomputer 2
0 is a hardness setting means, 22 is a temperature rise rate storage means, and 23 is a temperature comparison means. The hardness setting means 21 determines the hardness of the cooked rice, for example, "soft" and "normal".
And "hardening" are set in 3 stages. Numerals 24 and 25 are temperature rise rate detecting means and a rice cooking amount determining means which are connected to the output side of the temperature detecting means 16 and have a timer and an arithmetic function. The cooked rice amount judging means 25 judges the cooked rice amount in the inner pot 3 from the rising rate of the cooked rice temperature detected by the temperature rising rate detecting means 24 within a certain period of time, that is, the temperature gradient. Further, the boiling detection means 26 detects the boiling point of the temperature detected by the temperature detection means 16.
【0014】27は過熱量設定手段、28は電流量設定
手段である。温度センサ4と温度検出手段16及び温度
上昇率検出手段24を介して検出された炊飯温度の温度
上昇率は、温度比較手段23により温度上昇率記憶手段
22に予め記憶された理想的な炊飯温度曲線と比較され
る。温度比較手段23の比較結果は加熱量設定手段27
に出力され、電流量設定手段28と出力調整手段15を
介してスイッチング素子13の導通時間が制御される。
また、入力電流検出手段14の検出信号は電流量設定手
段28に出力され、過熱量設定手段27の設定した加熱
量に制御されるようになっている。Reference numeral 27 is an overheat amount setting means, and 28 is a current amount setting means. The temperature increase rate of the cooked rice temperature detected through the temperature sensor 4, the temperature detection means 16 and the temperature increase rate detection means 24 is the ideal rice cooked temperature previously stored in the temperature increase rate storage means 22 by the temperature comparison means 23. Compared to the curve. The comparison result of the temperature comparison means 23 is the heating amount setting means 27.
And the conduction time of the switching element 13 is controlled via the current amount setting means 28 and the output adjusting means 15.
Further, the detection signal of the input current detecting means 14 is outputted to the current amount setting means 28 and controlled to the heating amount set by the superheat amount setting means 27.
【0015】上記のような構成の本発明の炊飯器の動作
を、図2と図3を併用して次に説明する。内釜2に研い
だ米7と指示された適量の水6を入れて、内蓋3を閉
め、コードリールを引き出して、プラグを100V電源
のコンセントに接続する。次に、本体1の上面に設けら
れた操作部5の表示窓の表示を見ながら、タッチキーを
操作して食事の時刻を予約設定する。The operation of the rice cooker of the present invention having the above structure will be described below with reference to FIGS. 2 and 3. Pour the polished rice 7 and an appropriate amount of water 6 in the inner pot 2, close the inner lid 3, pull out the cord reel, and connect the plug to a 100V power outlet. Next, while watching the display on the display window of the operation unit 5 provided on the upper surface of the main body 1, the touch key is operated to set the meal time in advance.
【0016】予約した食事の時刻に対応する予備加熱の
開始時刻になると、タイマが働いて予備加熱が開始され
て加熱量設定手段27と電流量設定手段28及び出力調
整手段15を通して加熱コイル12に20〜50KHZ
程度の高周波電流が通電される。通電が始まると加熱コ
イル12は高周波励磁されて周囲に磁場が形成され、発
生した交番磁束が内釜2に鎖交して磁性体の内釜2内に
渦電流によるジュール熱が発生する。このような電磁誘
導作用によって内釜2に発生した熱が、内部の水6と米
7の加熱を始める。At the start time of preheating corresponding to the time of the reserved meal, a timer is activated to start preheating, and the heating coil 12 is supplied to the heating coil 12 through the heating amount setting means 27, the current amount setting means 28 and the output adjusting means 15. 20-50KHZ
A high frequency current of a certain degree is applied. When energization is started, the heating coil 12 is excited by a high frequency to form a magnetic field around the heating coil 12, and the generated alternating magnetic flux is linked to the inner pot 2 to generate Joule heat due to an eddy current in the inner pot 2 of the magnetic material. The heat generated in the inner pot 2 by such an electromagnetic induction action starts heating the water 6 and the rice 7 inside.
【0017】予備加熱時には供給された電流量は図2に
示すように、例えば10Aで、温度センサ4の検出温度
tx と温度上昇率検出手段24の設定温度ts とのチェ
ックが行われる(図2のステップS2,S3)。設定温
度ts は例えば30℃で、検出温度tx =30℃になる
と、図3に示すように温度上昇率検出手段24の計時が
スタートする。予備の加熱が進んで検出温度tx が上限
の40℃になると、計時動作が一旦停止する。As shown in FIG. 2, the amount of current supplied during the preheating is, for example, 10 A, and the temperature tx detected by the temperature sensor 4 and the set temperature ts of the temperature rise rate detecting means 24 are checked (FIG. 2). Steps S2 and S3). The set temperature ts is, for example, 30 ° C., and when the detected temperature tx = 30 ° C., the timing of the temperature rise rate detecting means 24 starts as shown in FIG. When the preliminary heating progresses and the detected temperature tx reaches the upper limit of 40 ° C., the timing operation is temporarily stopped.
【0018】検出温度tx =30〜40℃の経過時間τ
によって、炊飯量判定手段25で炊飯量Vが判定され
る。炊飯量判定手段25は経過時間τについて、60,
40,20,20〜(sec )の4段階に分類して比較す
る。炊飯量判定手段25の判定結果は過熱量設定手段2
7に出力され、上記の各段階に応じてS7 〜S13で示さ
れたように10,8,6,4Aの電流量が電流量設定手
段28において設定される。このようにして、炊飯量V
に応じた加熱が内釜2内の水6と米7に加えられて、予
備加熱から本格的な炊飯工程に移行する。Elapsed time τ of the detected temperature tx = 30-40 ° C.
The rice cooking amount determination means 25 determines the rice cooking amount V. The cooked rice amount judging means 25 calculates the elapsed time τ as 60,
40, 20, 20- (sec) are classified into 4 stages and compared. The determination result of the rice cooking amount determination means 25 is the overheat amount setting means 2
7 and the current amount of 10, 8, 6, 4 A is set in the current amount setting means 28 according to each of the above steps, as indicated by S7 to S13. In this way, cooked rice amount V
Is added to the water 6 and the rice 7 in the inner pot 2 to shift from the preheating to the full-scale rice cooking process.
【0019】一方、温度上昇率記憶手段22には、図4
に示すような時間Tに対して理想的な炊飯温度曲線(直
線)Cが記憶されている。そして、炊飯工程に入ると、
改めて温度比較手段23による図5に示す加熱制御動作
が開始する。加熱制御動作の開始時の出力電流I0 が、
例えば8Aでスタートを開始する。スタートして30se
c がカウントされると、炊飯温度曲線Cの理想温度tc1
と温度検出手段16の検出温度tx1が温度比較手段23
で比較される。On the other hand, the temperature rise rate storage means 22 stores in FIG.
An ideal cooked rice temperature curve (straight line) C for time T as shown in FIG. Then, when entering the rice cooking process,
The heating control operation shown in FIG. 5 by the temperature comparison means 23 starts again. The output current I0 at the start of the heating control operation is
For example, start at 8A. 30se after starting
When c is counted, the ideal temperature tc1 of the rice cooking temperature curve C
And the temperature tx1 detected by the temperature detecting means 16 is the temperature comparing means 23.
Compared with.
【0020】検出温度tx1と理想温度tc1との比較の結
果、温度検出手段16の検出温度tx1が高いときは出力
電流I0 =8−1=7(A)の電流量が電流量設定手段
28で設定される。また、温度比較手段23がtx1<t
c1に比較したときは、出力電流I0 =9が設定される
(図5のステップS8,S9 )。同様にして、30sec 毎
の比較による修正動作が継続されて、加熱量が理想的な
炊飯温度曲線Cに制御されるようになっている。As a result of the comparison between the detected temperature tx1 and the ideal temperature tc1, when the detected temperature tx1 of the temperature detecting means 16 is high, the current amount setting means 28 outputs the current amount of the output current I0 = 8-1 = 7 (A). Is set. Further, the temperature comparison means 23 is tx1 <t
When compared with c1, the output current I0 = 9 is set (steps S8 and S9 in FIG. 5). Similarly, the correction operation by comparison every 30 seconds is continued, and the heating amount is controlled to the ideal rice cooking temperature curve C.
【0021】加熱制御動作を伴う炊飯が進んで沸騰検出
手段26が水6が沸騰点の100℃を検出すると、過熱
量設定手段27により電流量が例えば4Aに降下され
る。沸騰に伴って内釜2内の水分がなくなると、温度が
急激に上昇し炊飯終了温度が検出されてから2度炊き加
熱が行われる。その後、ムラシ工程に移って、予定時刻
に御飯が炊き上げられる。When the boiling detection means 26 detects 100 ° C. at the boiling point of the water 6 due to the progress of rice cooking accompanied with the heating control operation, the superheat amount setting means 27 lowers the current amount to, for example, 4A. When the water content in the inner pot 2 disappears due to boiling, the temperature rises sharply and the rice is cooked and heated twice after the end-of-cooking temperature is detected. After that, move to the Murashi process and cook the rice at the scheduled time.
【0022】図6に、炊き上がり御飯の固さに応じた理
想的な炊飯温度曲線が示されている。ここでは、固さ加
減が“軟らかめ”と“普通”及び“固め”の3段階に選
定される。曲線C1 ,C2 ,C3 は、それぞれ“固め”
と“普通”及び“軟らかめ”を示している。御飯の固さ
は炊飯開始に先立って、操作部5を操作して予め固さ設
定手段21に設定される。そして、炊飯量Vの判定後の
炊飯工程が開始されると、これらの曲線C1 ,C2 ,C
3 を理想的な炊飯温度曲線Cを基準として前述と同様の
動作で加熱制御が行われるようになっている。FIG. 6 shows an ideal rice cooking temperature curve according to the hardness of cooked rice. Here, the degree of hardness is selected from three levels of "softness", "normal" and "hardness". Curves C1, C2 and C3 are "solid" respectively
And "normal" and "soft". The hardness of the rice is set in the hardness setting means 21 in advance by operating the operation unit 5 before starting the rice cooking. Then, when the rice cooking process after the determination of the rice cooking amount V is started, these curves C1, C2, C
Based on the ideal rice cooking temperature curve C as 3, the heating control is performed in the same operation as described above.
【0023】なお、上述の実施例では予備炊飯と本格炊
飯加熱の電流量が10Aと8Aに設定し炊飯量に対して
4段階に分け、加熱制御のチェックの時間間隔が30se
c の場合を例示して説明したが、必ずしもこれらの実施
例の値や分類等に限定するものではない。また、30〜
40℃の時間で炊飯量Vを求めたが、リニアな変化部分
であれば別の温度範囲を利用してもよい。また、一定時
間内の温度差で炊飯量を定めても良く、要するに炊飯中
の温度勾配に関連して炊飯量を検出するものであればよ
い。In the above embodiment, the amount of current for precooked rice and heating for full-scale rice cooking is set to 10 A and 8 A, and the amount of cooked rice is divided into four stages, and the time interval for checking heating control is 30 se.
Although the case of c has been described as an example, it is not necessarily limited to the values and classifications of these examples. Also, 30 ~
Although the cooked rice amount V was obtained at the time of 40 ° C., another temperature range may be used as long as it is a linear change portion. Further, the amount of cooked rice may be determined based on the temperature difference within a certain time, that is, any amount of cooked rice may be detected in relation to the temperature gradient during cooking rice.
【0024】[0024]
【発明の効果】この発明は、内釜を誘導加熱する加熱コ
イルと、加熱コイルに高周波電流を供給する電流供給手
段と、内釜の炊飯温度を検出する温度検出手段と、内釜
内で炊飯される御飯の理想的な炊飯温度曲線を記憶する
温度記憶手段と、温度記憶手段に記憶された炊飯温度曲
線と炊飯温度検出手段の検出温度とを比較する温度比較
手段と、温度比較手段の比較に基づいて加熱コイルに供
給される電流量を調節して内釜を加熱する加熱量を制御
する加熱量制御手段とを備え、加熱量制御手段により温
度比較手段の比較に基づいて電流供給手段から加熱コイ
ルに供給される電流量を温度記憶手段に記憶された温度
曲線に一致させるように加熱量制御手段を制御する炊飯
器を構成した。According to the present invention, a heating coil for inductively heating an inner pot, a current supplying means for supplying a high frequency current to the heating coil, a temperature detecting means for detecting a rice cooking temperature of the inner pot, and a rice cooked inside the inner pot. Comparing the temperature storing means for storing the ideal rice cooking temperature curve of the cooked rice, the temperature comparing means for comparing the rice cooking temperature curve stored in the temperature storing means with the detected temperature of the rice cooking temperature detecting means, and the temperature comparing means The heating amount control means for controlling the heating amount for heating the inner pot by adjusting the amount of current supplied to the heating coil based on the The rice cooker is configured to control the heating amount control unit so that the amount of current supplied to the heating coil matches the temperature curve stored in the temperature storage unit.
【0025】また、この発明は、内釜を誘導加熱する加
熱コイルと、加熱コイルに高周波電流を供給する電流供
給手段と、内釜の炊飯温度を検出する温度検出手段と、
内釜内で炊飯される御飯の固さの理想的な炊飯温度曲線
を記憶する温度記憶手段と、温度記憶手段に記憶された
御飯の固さに対応する炊飯温度曲線と前記温度検出手段
の検出温度とを比較する温度比較手段と、加熱コイルに
供給される電流量を調節して前記内釜を加熱する加熱量
を制御する加熱量制御手段とを備え、加熱量制御手段に
より温度比較手段の比較に基づいて電流供給手段から加
熱コイルに供給される電流量を温度記憶手段に記憶され
た理想的な御飯の固さの炊飯温度曲線に一致させるよう
に加熱量制御手段を制御する炊飯器を構成した。The present invention further comprises a heating coil for induction heating the inner pot, a current supplying means for supplying a high frequency current to the heating coil, and a temperature detecting means for detecting the rice cooking temperature of the inner pot.
Temperature storage means for storing an ideal rice-cooking temperature curve of the hardness of the rice cooked in the inner pot, rice-cooking temperature curve corresponding to the hardness of the rice stored in the temperature storage means, and detection of the temperature detection means The temperature comparing means for comparing the temperature and the heating amount controlling means for controlling the heating amount for heating the inner pot by adjusting the amount of current supplied to the heating coil are provided. Based on the comparison, a rice cooker that controls the heating amount control means to match the amount of current supplied from the current supply means to the heating coil with the ideal rice hardness temperature curve stored in the temperature storage means Configured.
【0026】従来の炊飯器のように、炊飯量により加熱
時間が異なることがなくなり、御飯の炊き上がりを一様
にすることができる。また、スイッチのオン・オフ動作
を利用しないので、接点の摩耗等の故障が生じない。ま
た、加熱が理想的な炊飯温度曲線に制御されるので、炊
飯精度を高めることができる。Unlike the conventional rice cooker, the heating time does not vary depending on the amount of cooked rice, and the cooked rice can be cooked uniformly. In addition, since the on / off operation of the switch is not used, no failure such as wear of the contacts occurs. Further, since the heating is controlled to the ideal rice cooking temperature curve, the rice cooking accuracy can be improved.
【0027】よって、本発明によれば、炊飯量の変化に
無関係に加熱時間を一定にして、加熱量を炊飯量に正確
に対応させると共に、好みに合った理想的な炊き上がり
御飯の固さの炊飯を行う炊飯器を提供することができ
る。Therefore, according to the present invention, the heating time is made constant regardless of the change in the amount of cooked rice so that the amount of cooked food can be accurately corresponded to the amount of cooked rice, and the hardness of the ideal cooked rice to suit the taste. It is possible to provide a rice cooker for cooking rice.
【図1】本発明実施例の構成説明図である。FIG. 1 is a structural explanatory view of an embodiment of the present invention.
【図2】本発明実施例の炊飯量の判定動作を説明するフ
ローチャートである。FIG. 2 is a flow chart illustrating a rice cooking amount determination operation according to the embodiment of the present invention.
【図3】本発明実施例の炊飯動作を説明する線図であ
る。FIG. 3 is a diagram illustrating a rice cooking operation according to an embodiment of the present invention.
【図4】本発明実施例の加熱量の制御動作を説明する線
図である。FIG. 4 is a diagram illustrating a heating amount control operation according to an embodiment of the present invention.
【図5】本発明実施例の加熱量の制御動作を説明するフ
ローチャートである。FIG. 5 is a flowchart illustrating a heating amount control operation according to an embodiment of the present invention.
【図6】本発明実施例の炊き上り御飯の固さの制御動作
を説明する線図である。FIG. 6 is a diagram illustrating a control operation of the hardness of cooked rice according to the embodiment of the present invention.
【図7】従来の炊飯器の構成説明図である。FIG. 7 is an explanatory diagram of a configuration of a conventional rice cooker.
1 炊飯器の本体 2 内釜 4 温度センサ 5 操作部 6 水 7 米 8 商用電源 12 加熱コイル 13 スイッチング素子 15 出力調整手段 16 温度検出手段 20 マイコン 21 固さ設定手段 22 温度記憶手段 23 温度比較手段 24 温度上昇率検出手段 25 炊飯量判定手段 26 沸騰検出手段 27 加熱量設定手段 28 電流量設定手段 1 Main body of rice cooker 2 Inner pot 4 Temperature sensor 5 Operation part 6 Water 7 Rice 8 Commercial power supply 12 Heating coil 13 Switching element 15 Output adjusting means 16 Temperature detecting means 20 Microcomputer 21 Hardness setting means 22 Temperature storage means 23 Temperature comparison means 24 Temperature Rise Rate Detection Means 25 Rice Cooking Amount Determination Means 26 Boiling Detection Means 27 Heating Amount Setting Means 28 Current Amount Setting Means
Claims (2)
熱コイルに高周波電流を供給する電流供給手段と、前記
内釜の炊飯温度を検出する温度検出手段と、前記内釜内
で炊飯される御飯の理想的な炊飯温度曲線を記憶する温
度記憶手段と、該温度記憶手段に記憶された炊飯温度曲
線と前記炊飯温度検出手段の検出温度とを比較する温度
比較手段と、該温度比較手段の比較に基づいて前記加熱
コイルに供給される電流量を調節して前記内釜を加熱す
る加熱量を制御する加熱量制御手段とを備え、 該加熱量制御手段により前記温度比較手段の比較に基づ
いて電流供給手段から加熱コイルに供給される電流量を
前記記憶手段に記憶された温度曲線に一致させるように
加熱量制御手段を制御することを特徴とする炊飯器。1. A heating coil for inductively heating an inner pot, a current supply means for supplying a high frequency current to the heating coil, a temperature detecting means for detecting a rice cooking temperature of the inner pot, and rice cooked in the inner pot. Temperature storing means for storing an ideal rice cooking temperature curve of cooked rice, temperature comparing means for comparing the rice cooking temperature curve stored in the temperature storing means with the detected temperature of the rice cooking temperature detecting means, and the temperature comparing means. And a heating amount control means for controlling the heating amount for heating the inner pot by adjusting the amount of current supplied to the heating coil based on the comparison of the above. A rice cooker characterized in that the heating amount control means is controlled so that the amount of current supplied from the current supply means to the heating coil matches the temperature curve stored in the storage means based on the above.
熱コイルに高周波電流を供給する電流供給手段と、前記
内釜の炊飯温度を検出する温度検出手段と、前記内釜内
で炊飯される御飯の固さの理想的な炊飯温度曲線を記憶
する温度記憶手段と、該温度記憶手段に記憶された御飯
の固さに対応する炊飯温度曲線と前記温度検出手段の検
出温度とを比較する温度比較手段と、前記加熱コイルに
供給される電流量を調節して前記内釜を加熱する加熱量
を制御する加熱量制御手段とを備え、 該加熱量制御手段により前記温度比較手段の比較に基づ
いて電流供給手段から加熱コイルに供給される電流量を
前記温度記憶手段に記憶された理想的な御飯の固さの炊
飯温度曲線に一致させるように加熱量制御手段を制御す
ることを特徴とする炊飯器。2. A heating coil for induction heating the inner pot, a current supply means for supplying a high-frequency current to the heating coil, a temperature detecting means for detecting a rice cooking temperature of the inner pot, and rice cooked in the inner pot. Temperature storing means for storing an ideal rice cooking temperature curve of rice hardness, and comparing the rice cooking temperature curve corresponding to the rice hardness stored in the temperature storing means with the temperature detected by the temperature detecting means. The temperature comparison means is provided with a heating amount control means for adjusting the amount of current supplied to the heating coil to control the heating amount for heating the inner pot, and the heating amount control means allows the comparison of the temperature comparison means. On the basis of the above, the heating amount control means is controlled so that the amount of current supplied from the current supply means to the heating coil matches the ideal cooking rice temperature curve of rice hardness stored in the temperature storage means. Rice cooker.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21763192A JPH0662955A (en) | 1992-08-17 | 1992-08-17 | Rice boiler |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21763192A JPH0662955A (en) | 1992-08-17 | 1992-08-17 | Rice boiler |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0662955A true JPH0662955A (en) | 1994-03-08 |
Family
ID=16707301
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21763192A Pending JPH0662955A (en) | 1992-08-17 | 1992-08-17 | Rice boiler |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0662955A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003151738A (en) * | 2001-11-14 | 2003-05-23 | Matsushita Electric Ind Co Ltd | Induction heating cooking device |
CN102125385A (en) * | 2010-12-09 | 2011-07-20 | 美的集团有限公司 | Electric cooker and porridge cooking control method thereof |
JP2012502410A (en) * | 2008-09-09 | 2012-01-26 | 一峰 林 | Heating control device and heating control method |
CN102342737A (en) * | 2011-08-31 | 2012-02-08 | 佛山市顺德区美的电热电器制造有限公司 | Cooking control method of electric rice cooker |
CN102440679A (en) * | 2010-10-13 | 2012-05-09 | 珠海格力电器股份有限公司 | Rice cooking method of electric cooker with self-defined heating mode and electric cooker |
CN106618152A (en) * | 2016-12-07 | 2017-05-10 | 宁波方太厨具有限公司 | Heating cooking apparatus and its boiling water recognition method |
-
1992
- 1992-08-17 JP JP21763192A patent/JPH0662955A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003151738A (en) * | 2001-11-14 | 2003-05-23 | Matsushita Electric Ind Co Ltd | Induction heating cooking device |
JP2012502410A (en) * | 2008-09-09 | 2012-01-26 | 一峰 林 | Heating control device and heating control method |
CN102440679A (en) * | 2010-10-13 | 2012-05-09 | 珠海格力电器股份有限公司 | Rice cooking method of electric cooker with self-defined heating mode and electric cooker |
CN102125385A (en) * | 2010-12-09 | 2011-07-20 | 美的集团有限公司 | Electric cooker and porridge cooking control method thereof |
CN102342737A (en) * | 2011-08-31 | 2012-02-08 | 佛山市顺德区美的电热电器制造有限公司 | Cooking control method of electric rice cooker |
CN106618152A (en) * | 2016-12-07 | 2017-05-10 | 宁波方太厨具有限公司 | Heating cooking apparatus and its boiling water recognition method |
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