JPH0158975B2 - - Google Patents
Info
- Publication number
- JPH0158975B2 JPH0158975B2 JP22224485A JP22224485A JPH0158975B2 JP H0158975 B2 JPH0158975 B2 JP H0158975B2 JP 22224485 A JP22224485 A JP 22224485A JP 22224485 A JP22224485 A JP 22224485A JP H0158975 B2 JPH0158975 B2 JP H0158975B2
- Authority
- JP
- Japan
- Prior art keywords
- rice
- pot
- temperature
- heating element
- cooked
- 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.)
- Expired
Links
- 241000209094 Oryza Species 0.000 claims description 47
- 235000007164 Oryza sativa Nutrition 0.000 claims description 47
- 235000009566 rice Nutrition 0.000 claims description 47
- 238000010438 heat treatment Methods 0.000 claims description 18
- 238000010411 cooking Methods 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 11
- 230000005611 electricity Effects 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000009835 boiling Methods 0.000 description 3
- 235000013305 food Nutrition 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004397 blinking Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
Landscapes
- Cookers (AREA)
Description
【発明の詳細な説明】
本発明は炊飯器に関し、炊飯量に応じて電力を
自動的に制御する炊飯器を提供しようとするもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rice cooker, and an object of the present invention is to provide a rice cooker that automatically controls power according to the amount of rice cooked.
一般にご飯を炊く場合、洗米後、米に充分吸水
させる必要がある。 Generally, when cooking rice, it is necessary to wash the rice and allow it to absorb enough water.
すなわち、火力が強すぎると米の表面だけが炊
け、逆に火力が弱いと全体として火の通らないご
飯を炊く欠点がある。 In other words, if the heat is too strong, only the surface of the rice will be cooked, and if the heat is too weak, the rice will not be cooked through as a whole.
しかし、従来の炊飯器として、最初だけ火力を
強くし、ご飯の温度が95℃前後に達すると火力を
弱くするものが見られるが炊飯量に関係なく、火
力が変化するに過ぎず、炊飯量に応じた適切な火
力でご飯を炊く炊飯器が望まれていた。 However, some conventional rice cookers increase the heat only at the beginning and then reduce the heat when the temperature of the rice reaches around 95℃, but the heat only changes regardless of the amount of rice cooked. There was a demand for a rice cooker that would cook rice with the appropriate heat depending on the situation.
本発明は上記要望に鑑みなされたもので、以
下、本発明の実施例について添付図面を参照して
説明する。 The present invention has been made in view of the above needs, and embodiments of the present invention will be described below with reference to the accompanying drawings.
第１図において、１は本体であり、底部にて下
枠１０にカシメ結合されている。２は発熱体であ
り、上面に鍋３が載置され、この鍋３に調理物を
入れて調理が行われる。４は保護枠であり、上部
にて、把手が一体成型された上枠により本体１と
連結されている。この保護枠４の底部に発熱体２
が取付けられている。６は本体断熱材である。７
は発熱体２の中央部に出没自在に設けたサーモス
イツチで、このサーモスイツチ７は鍋３の底に当
接し、鍋３の底温度を変換して得られた電気信号
を後述する制御ユニツトに入力するものである。
またこのサーモスイツチ７はスイツチレバー８を
通じて完成接点板９を開閉する。１１は完成制御
ユニツトでトライアツク、トランジスタ、コンデ
ンサ、ダイオード、抵抗等がプリント基板に組込
まれている。１２は完成制御ユニツト１１を遮熱
板１４に取付ける絶縁碍子、１３は完成制御ユニ
ツト１１と遮熱板１４の絶縁距離を確保するため
の絶縁板である。１５は鍋３の温度、すなわち調
理物の温度を感知するための鍋温度検出用素子
で、例えばサーミスタよりなり、これは鍋３の外
周側面の一定高さに当接するように保護枠４に取
付けられている。１６は発熱体２の異常温度上昇
を防止するための保安用センサで、発熱体２に接
した保護枠４の底面に取付けられている。１７は
スイツチレバー８を取付けるための表示板であ
る。２８は調理物に焦げ目を付けることを選択す
る切替えスイツチである。１８は外蓋であり、中
蓋１９と蓋枠２０により外被が構成されている。
２５は蓋断熱材、２１は蓋取付用ボス、２２は蓋
ツマミ、２３は蓋ツマミ台、２４は内蓋２６と中
蓋１９の間に取付けられたパツキングゴムであ
り、内蓋２６を鍋３の上縁に外蓋１８の重みも加
えて密着良く載置するための機能を果たす。２７
は裏板で、脚２９が取付けられるとともに完成制
御ユニツト１１を覆つている。３０は保温用発熱
体であり、保護枠４の上縁近くに巻かれている。
前記鍋温度検出用素子１５もサーモスイツチ７と
同様に検出温度を電気信号に変換するもので、こ
の出力された電気信号を制御ユニツト１１に入力
するものである。 In FIG. 1, 1 is a main body, which is caulked to a lower frame 10 at the bottom. Reference numeral 2 denotes a heating element, on which a pot 3 is placed, and food is put into the pot 3 for cooking. Reference numeral 4 denotes a protective frame, and the upper part thereof is connected to the main body 1 by an upper frame having an integrally molded handle. A heating element 2 is attached to the bottom of this protective frame 4.
is installed. 6 is a main body insulation material. 7
is a thermoswitch installed in the center of the heating element 2 so as to be freely retractable.This thermoswitch 7 comes into contact with the bottom of the pot 3, converts the bottom temperature of the pot 3, and sends an electrical signal obtained to a control unit to be described later. This is what you input.
The thermo switch 7 also opens and closes the completed contact plate 9 through a switch lever 8. 11 is a completed control unit in which triacs, transistors, capacitors, diodes, resistors, etc. are incorporated into a printed circuit board. 12 is an insulator for attaching the completed control unit 11 to the heat shield plate 14, and 13 is an insulating plate for ensuring the insulation distance between the completed control unit 11 and the heat shield plate 14. Reference numeral 15 denotes a pot temperature detection element for sensing the temperature of the pot 3, that is, the temperature of the food to be cooked, and is made of, for example, a thermistor, and is attached to the protective frame 4 so as to abut at a certain height on the outer peripheral side of the pot 3. It is being Reference numeral 16 denotes a safety sensor for preventing abnormal temperature rise of the heating element 2, which is attached to the bottom surface of the protective frame 4 in contact with the heating element 2. 17 is a display board on which the switch lever 8 is attached. 28 is a switch for selecting browning of the cooked food. 18 is an outer cover, and an inner cover 19 and a cover frame 20 constitute an outer cover.
25 is a lid insulation material, 21 is a boss for attaching the lid, 22 is a lid knob, 23 is a lid knob stand, 24 is a packing rubber installed between the inner lid 26 and the inner lid 19, and the inner lid 26 is attached to the pot 3. The weight of the outer lid 18 is also added to the upper edge to serve the function of placing the lid 18 in close contact. 27
is a back plate to which the legs 29 are attached and which covers the completed control unit 11. 30 is a heating element for heat retention, which is wound near the upper edge of the protective frame 4.
The pot temperature detection element 15 also converts the detected temperature into an electrical signal, similar to the thermoswitch 7, and this output electrical signal is input to the control unit 11.
次に上記構成における動作について第２図を参
照して説明する。 Next, the operation of the above configuration will be explained with reference to FIG.
鍋３に米と水を入れ、鍋３を発熱体２に載置
し、内蓋２６、外蓋１８をセツトする。スイツチ
レバー８を下方に押圧し、サーモスイツチ７を上
方に押し上げ、完成接点板９の接点を閉じて炊飯
を開始する（第２図ａ点）。この炊飯初期（第２
図ａ〜ｂ）においては米の吸水が行われる。この
後鍋温度が上昇するが、鍋温度検出用素子１５が
鍋３の側面温度を測定し、その温度上昇率、すな
わち単位時間あたりの温度勾配、つまりΔt／Δsを鍋
温度検出用素子１５の抵抗値変化により完成制御
ユニツト１１に組込まれたIC4（マイクロコンピユ
ータ）が捕え、この後の炊き上げ電力を決定し、
炊飯量に応じた電力で炊き上げる。なお、第２図
中ｂからｃまでは一定電力、例えば全電力で加熱
する。炊飯量判定後、一定時間を経過すると、ご
飯の吸水がほぼ完了したｄ点に達し、火の通つた
後のカニ孔が見られる。カニ孔ができると、沸騰
維持に要する電力は炊き上げ電力ほど必要とせ
ず、炊き上げ電力の60〜90％とし、沸騰時間を長
く維持させることができ、ご飯のα化が進み、お
いしいふつくらとしたご飯ができる。この際の電
力は時間ΔsによりIC4で計算される電力である。
水がご飯に充分吸水され、鍋底温度が上昇し、ｅ
点に達するとサーモスイツチ７が感知して作動
し、スイツチレバー８を介して完成接点板９の接
点を開く。そしてこの完成接点板９の接点が開か
れると、この信号が完成制御ユニツト１１に組み
込まれたIC4に入力され、そしてこのIC4は炊飯完
了を示す信号を出力してトライアツクＡをオフ動
作させ、これにより発熱体２への通電を停止して
炊飯を完了する。なお、追い炊きを実施する場合
には、鍋温度が一定温度ｆ点まで低下すると、ト
ライアツクＡが導通、すなわちオンして発熱体２
に電流が流れ、一定温度ｇ点まで温度上昇させて
焦げ目を付け、香しいおいしいご飯にすることが
できる。この後15分間程度蒸らしを行なつておい
しいご飯を食べれるようになる。以後はトライア
ツクＡが遮断、すなわちオフ状態となり、発熱体
２、保温用発熱体３０、トライアツクＢの直列回
路となつてトライアツクＢの断続により保温制御
がなされる。 Rice and water are put into the pot 3, the pot 3 is placed on the heating element 2, and the inner cover 26 and outer cover 18 are set. Press the switch lever 8 downward, push the thermo switch 7 upward, close the contacts on the completed contact plate 9, and start cooking rice (point a in Figure 2). This early stage of rice cooking (second stage)
In figures a-b) water absorption of the rice takes place. After this, the pot temperature rises, but the pot temperature detection element 15 measures the side temperature of the pot 3 and calculates the rate of temperature increase, that is, the temperature gradient per unit time, that is, Δt/Δs. The IC 4 (microcomputer) built into the completed control unit 11 captures the change in resistance value and determines the subsequent cooking power.
Cooks rice using electricity according to the amount of rice cooked. Note that heating is performed with constant power, for example, with full power, from b to c in FIG. After a certain period of time has elapsed after determining the amount of cooked rice, the rice reaches point d, where water absorption is almost complete, and crab holes can be seen after the rice is cooked. Once the crab holes are formed, the electricity required to maintain boiling is not as much as the electricity required for cooking, but is 60 to 90% of the electricity used for cooking, and the boiling time can be maintained for a long time. You can make soft rice. The power at this time is the power calculated by IC 4 based on the time Δs.
Sufficient water is absorbed by the rice, and the temperature at the bottom of the pot rises.
When this point is reached, the thermo switch 7 senses and operates, opening the contacts of the completed contact plate 9 via the switch lever 8. When the contact on the completion contact plate 9 is opened, this signal is input to the IC 4 built into the completion control unit 11, and this IC 4 outputs a signal indicating the completion of rice cooking and turns off the triac A. , thereby stopping the power supply to the heating element 2 and completing the rice cooking. In addition, when performing additional cooking, when the pot temperature drops to a certain temperature point f, the triax A becomes conductive, that is, turns on, and the heating element 2 is turned on.
An electric current flows through the rice, raising the temperature to a certain point G and browning the rice, making it fragrant and delicious. After this, steam the rice for about 15 minutes and you will be able to eat delicious rice. Thereafter, the triac A is cut off, that is, turned off, and the heating element 2, the heat-retaining heating element 30, and the triac B form a series circuit, and the heat-retaining control is performed by turning the triac B on and off.
次に本実施例の具体回路構成について第３図を
参照して説明する。この第３図において、イは電
力制御部であり、発熱体２、保温用発熱体３０、
トライアツクＡ，Ｂにより構成されている。ロは
電源回路部であり、交流電圧を直流電圧に変換
し、電子回路の電源となつている。ハは電源零相
検出回路であり、電源波形の零点でゲート電流を
トライアツクＡに送り、雑音が出ないようにして
いる。ニは電源電圧検出回路、ホはIC4のタイマ
ー回路用の発振周波数決定回路である。ヘは温度
検出回路である。トは電力制御素子駆動回路であ
り、IC4からの信号によりトライアツクＡ，Ｂを
駆動し、発熱体２および保温用発熱体３０への通
電制御を行つている。チは表示回路で、炊飯、追
炊き、蒸らし、保温の各工程がLED素子の点滅
により表示される。リは炊飯スイツチ遅延回路
で、サーモスイツチ７が開放動作後、IC4に信号
を送り、追炊き時の電力を一定にさせるものであ
る。 Next, the specific circuit configuration of this embodiment will be explained with reference to FIG. In this FIG.
It is composed of triaxes A and B. B is the power supply circuit section, which converts AC voltage to DC voltage and serves as a power source for electronic circuits. C is a power supply zero-phase detection circuit, which sends a gate current to the triax A at the zero point of the power supply waveform to prevent noise from occurring. D is a power supply voltage detection circuit, and E is an oscillation frequency determining circuit for the timer circuit of IC 4 . F is a temperature detection circuit. A power control element driving circuit drives the triacs A and B based on the signal from the IC 4 , and controls the supply of electricity to the heating element 2 and the heat-retaining heating element 30. H is a display circuit that displays each step of cooking, additional cooking, steaming, and keeping warm by blinking LED elements. 2 is a rice cooking switch delay circuit which sends a signal to IC 4 after the thermo switch 7 is opened to keep the power constant during additional cooking.
上記構成において、鍋温度検出用素子１５の抵
抗値変化をあらかじめIC4にプログラミングする
ことにより、IC4が電源周波数をカウントして時
間を読み取り、炊き上げ後、発熱体２の電力を必
要電力にするため、沸騰維持が長く保たれるので
ご飯のα化が促進され、おいしいご飯を炊くこと
ができる。 In the above configuration, by programming the resistance value change of the pot temperature detection element 15 into the IC 4 in advance, the IC 4 counts the power frequency and reads the time, and after cooking, the power of the heating element 2 is adjusted to the required power. As a result, boiling can be maintained for a long time, which promotes gelatinization of the rice, making it possible to cook delicious rice.
以上の説明から明らかなように本発明によれ
ば、炊飯量に従つて鍋温度検出用素子が当接する
鍋の側面温度を測定し、その温度上昇率、つまり
温度勾配によつて自動的に炊飯量が判断できるた
め、使用者はただスタートボタンを押すだけで炊
飯の工程がプログラムに従つて進行することにな
り、その結果、操作の繁雑性、誤操作等を解消す
ることができ、また炊飯量に応じた最適な電力を
供給することができ、かつ米温の立上り特性も炊
飯量による影響を少なく抑えられ、十分α化に必
要な温度90℃以上に保持できるため、おいしいご
はんが炊けるというすぐれた効果を奏するもので
ある。 As is clear from the above description, according to the present invention, the temperature of the side surface of the pot that the pot temperature detection element contacts is measured according to the amount of rice cooked, and the rice is automatically cooked based on the temperature rise rate, that is, the temperature gradient. Since the amount can be judged, the rice cooking process will proceed according to the program simply by pressing the start button.As a result, complicated operations and incorrect operations can be eliminated, and the amount of rice to be cooked can be determined. It is possible to supply the optimum power according to the amount of rice cooked, and the rise in rice temperature is less affected by the amount of rice cooked, and the temperature can be maintained at 90℃ or higher, which is necessary for sufficient gelatinization, making it possible to cook delicious rice. It has the following effects.
第１図は本発明の一実施例を示す炊飯器の断面
図、第２図は同炊飯器の温度特性図、第３図は同
炊飯器の電気回路図である。
２……発熱体、３……鍋、７……サーモスイツ
チ、１５……鍋温度検出用素子、Ａ，Ｂ……トラ
イアツク、ヘ……温度検出回路、IC4……マイク
ロコンピユータ。
FIG. 1 is a sectional view of a rice cooker showing an embodiment of the present invention, FIG. 2 is a temperature characteristic diagram of the rice cooker, and FIG. 3 is an electric circuit diagram of the rice cooker. 2... Heating element, 3... Pot, 7... Thermoswitch, 15... Pot temperature detection element, A, B... Triack, F... Temperature detection circuit, IC 4 ... Microcomputer.
Claims (1)
周側面の高さの位置に鍋温度検出用素子を設け、
その温度を入力信号として単位時間あたりの温度
勾配を求めて炊飯量を測定し、炊飯量に対応して
発熱体への電力を指定する制御信号と、鍋の底温
度信号を入力信号として炊飯完了を示す信号とを
出力するようにしたマイクロコンピユータを内蔵
する炊飯器。1. A pot temperature detection element is installed at a height on the outer circumferential side of the pot at a distance above a certain distance from the heating element,
Using that temperature as an input signal, calculate the temperature gradient per unit time to measure the amount of rice cooked, and use the control signal that specifies the power to the heating element according to the amount of rice to be cooked, and the bottom temperature signal of the pot as the input signal to complete the rice cooking. A rice cooker with a built-in microcomputer that outputs a signal indicating .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60222244A JPS61247422A (en) | 1985-10-04 | 1985-10-04 | rice cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60222244A JPS61247422A (en) | 1985-10-04 | 1985-10-04 | rice cooker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61247422A JPS61247422A (en) | 1986-11-04 |
| JPH0158975B2 true JPH0158975B2 (en) | 1989-12-14 |
Family
ID=16779356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60222244A Granted JPS61247422A (en) | 1985-10-04 | 1985-10-04 | rice cooker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61247422A (en) |
-
1985
- 1985-10-04 JP JP60222244A patent/JPS61247422A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61247422A (en) | 1986-11-04 |
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