JPH0114251Y2 - - Google Patents
Info
- Publication number
- JPH0114251Y2 JPH0114251Y2 JP1981132090U JP13209081U JPH0114251Y2 JP H0114251 Y2 JPH0114251 Y2 JP H0114251Y2 JP 1981132090 U JP1981132090 U JP 1981132090U JP 13209081 U JP13209081 U JP 13209081U JP H0114251 Y2 JPH0114251 Y2 JP H0114251Y2
- Authority
- JP
- Japan
- Prior art keywords
- rice
- temperature
- amount
- cooked
- 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.)
- Expired
Links
- 241000209094 Oryza Species 0.000 claims description 99
- 235000007164 Oryza sativa Nutrition 0.000 claims description 99
- 235000009566 rice Nutrition 0.000 claims description 99
- 238000010411 cooking Methods 0.000 claims description 41
- 238000010438 heat treatment Methods 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 239000004065 semiconductor Substances 0.000 description 6
- 230000000875 corresponding effect Effects 0.000 description 4
- 244000145845 chattering Species 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Cookers (AREA)
- Control Of Temperature (AREA)
Description
【考案の詳細な説明】
本考案は自動炊飯プログラムを記憶したマイク
ロコンピユータを内蔵した電気炊飯器に関するも
のである。[Detailed Description of the Invention] The present invention relates to an electric rice cooker that includes a built-in microcomputer that stores an automatic rice cooking program.
従来の電気炊飯器はあらかじめ炊飯量に見合つ
た炊飯電力をセツトできるスイツチ操作を行つて
少な目のときは電力を下げて米温の急激な温度上
昇を抑えて米の内部への吸水を順調に行つて沸騰
させる。又多目のときは最大電力になるようにし
て米温の立上りが遅れぬように早目に沸騰させ
る。そして炊飯量の多目、少目にかかわらず内鍋
の底に水分がなくなつて内鍋底に設置した熱応動
開閉器が切れるときは米温が98℃以上のいわゆる
α化に必要な温度に達するようにして美味しいご
飯が炊けるようにしていた。しかし、炊飯前に必
らず炊飯量の指定を行う操作ぼたんを押して適正
電力となるようにセツトして炊飯する必要あり、
又炊飯量の指定を間違えて操作ぼたんを押した場
合間違つた炊飯電力が供給された適正な炊飯がで
きない。これらの操作の煩雑性、誤操作を生ずる
等欠点があつた。 Conventional electric rice cookers operate a switch that allows you to set the cooking power according to the amount of rice to be cooked in advance, and when the amount of rice is low, the power is lowered to prevent a sudden rise in the rice temperature and allow water to absorb smoothly into the rice. Bring to a boil. Also, if you are using a lot of rice, turn on the maximum power and boil the rice quickly so that the rice temperature does not rise too late. Regardless of whether you cook a lot of rice or a little, when there is no moisture at the bottom of the inner pot and the heat-responsive switch installed at the bottom of the inner pot turns off, the rice temperature reaches 98℃ or higher, the temperature required for gelatinization. I was trying to make sure that the food was cooked properly so that I could cook delicious rice. However, before cooking rice, it is necessary to press the button to specify the amount of rice to be cooked and set the power to the appropriate amount.
Also, if you press the operation button while specifying the amount of rice to be cooked incorrectly, the wrong rice cooking power will be supplied and proper rice cooking will not be possible. There were drawbacks such as the complexity of these operations and the possibility of erroneous operations.
本考案は上記欠点を除くためになされたもの
で、発熱体からある一定距離以上へだてた内鍋の
外周部又は外周底部に温度検出器の感温部を設け
た温度検出手段と、内鍋を加熱する発熱体をスイ
ツチ素子によつて調整する調整手段と、炊飯スイ
ツチからの動作開始信号を出力する信号発生手段
と、前記温度検出手段と調整手段と信号発生手段
および炊飯動作処理を司どるマイクロコンピユー
タとからなる電気炊飯器において、炊飯スイツチ
を動作させてから発熱体に炊飯量に関係なく一律
の電力を供給し、温度検出器がある一定温度T0
を検出した後、ある一定時間だけ電力の供給を中
止し前記一定時間後の温度Taを検出しT0−Taの
温度差によつて炊飯量を判断し次工程の電力量を
きめるような炊飯動作処理をマイクロコンピユー
タに設けたことにより、自動的に炊飯量を判断し
炊飯量に応じた最適な電力を供給しα化に必要な
温度を保持することができ、煩雑性、誤操作もな
く美味しいご飯を炊くことができる構造を提供す
ることである。 The present invention has been made to eliminate the above-mentioned drawbacks, and includes a temperature detection means in which a temperature sensing part of a temperature detector is provided on the outer periphery or the outer periphery bottom of the inner pot that extends beyond a certain distance from the heating element, and the inner pot. An adjustment means for adjusting the heating element to be heated by a switch element, a signal generation means for outputting an operation start signal from the rice cooking switch, the temperature detection means, the adjustment means, the signal generation means, and a microcontroller for controlling rice cooking operation processing. In an electric rice cooker consisting of a computer, after operating the rice cooking switch, uniform power is supplied to the heating element regardless of the amount of rice cooked, and a temperature detector is set at a constant temperature T 0
After detecting the temperature, the power supply is stopped for a certain period of time, the temperature T a after the certain period of time is detected, and the amount of rice to be cooked is determined based on the temperature difference of T 0 - T a , and the amount of electricity for the next process is determined. By installing rice cooking operation processing in the microcomputer, it is possible to automatically determine the amount of rice to be cooked, supply the optimal power according to the amount of rice, and maintain the temperature necessary for gelatinization, reducing complexity and operation errors. The purpose is to provide a structure that allows you to cook delicious rice without any hassle.
以下本考案の一実施例を図面により説明する。 An embodiment of the present invention will be described below with reference to the drawings.
実施例の構成は第１図、第２図の如くであり、
１は外枠である。２は内枠で外枠１内に容器状の
底部を隙間をもたせ固着せしめたものであり、そ
の内枠２内底部に発熱体４を内蔵する加熱盤５を
設置するものである。６は熱応動開閉器で上記加
熱盤５の中央部を貫通し出没自在に設け、前記外
枠１と内枠２の底部との隙間にその熱応動開閉器
６と炊飯ぼたん１０とを連結するレバー９と連動
する如く炊飯スイツチ７を設けたものである。な
お熱応動開閉器６は自動復帰形のものである。３
は内鍋で、内枠２内の加熱盤５に載置し、米１３
及びその米量に見合つた水１２を収納するもの
で、上部開口面を内蓋１６で覆う如くせしめ内蓋
１６は蓋１５と連結し、蓋１５は外枠１に一端を
枢支し開閉自在とさせたものである。８は制御装
置で、後記する電気部品、電気回路部を収納し、
外枠１外壁に装着して設けたものである。１１は
温度検出素子で、発熱体４からなる一定距離以上
へだて、かつ内鍋３の少目炊飯量の水面Ａと多目
炊飯量の水面Ｂ間に対応する内鍋３の側面外周部
にその感温部を当接し、内枠２に弾性的に固着し
て設けたものである。制御装置８の構成は第２図
の如くであり、マイクロコンピユータ１４を中心
として周辺回路からなつている。ここに示すマイ
クロコンピユータ１４の中は演算論理回路RAM
（randon access memory）、ROM（read only
memory）、各種レジスタ及びオシレータ等から
構成されているいわゆるワンチツプマイクロコン
ピユータを示している。自動炊飯に必要なプログ
ラムはマイクロコンピユータ１４内のROM内ウ
エハー上にマスク処理で加工され写しこまれてい
る。温度検出器１１はＡ／Ｄ変換器２６を介しマ
イクロコンピユータ１４の入力端O1〜O4に接続
され、Ａ／Ｄ変換器２６により符号化してマイク
ロコンピユータ１４に入力され、例えばマイクロ
コンピユータ１４の入力端O1〜O4から４ビツト
の２進数を出力してＡ／Ｄ変換器２６内の比較回
路で４ビツト２進コードのアナログ量と温度検出
器１１からのアナログ量を比較して２進数がどん
な数かを判断して等価的にマイクロコンピユータ
１４が温度検出器１１の温度データを読みこまれ
る。マイクロコンピユータ１４の出力端O0には
トライバ２３を介しフオトカプラ２２の発光部と
抵抗２４とを接続し、交流電源１８に発熱体４と
半導体スイツチ素子１９の閉回路を有し、その半
導体スイツチ素子１９のゲートには抵抗２１、フ
オトカプラ２２の受光部を通して直流電源２０を
交流電源１８、半導体スイツチ素子１９間に接続
する回路を接続して設けたものである。また他の
入力端I1には熱応動開閉器６と連動する炊飯スイ
ツチ７に抵抗２５、チヤタリング防止回路１７を
介し接続せしめてなる。なお、マイクロコンピユ
ータ１４と炊飯スイツチ７によつて炊飯完了時
OFF信号を出力して半導体スイツチ素子１９の
駆動を中止し発熱体４への炊飯電力の供給を
OFFする如く構成したものである。又温度検出
器１１とマイクロコンピユータ１４によつて炊飯
量が少いと判断されるとその炊飯量に見合つた電
力になる如く炊飯制御信号をON，OFFの断続の
通電比率を変えるようにして半導体スイツチ素子
１９をON，OFF駆動させて発熱体４への適正電
力を供給する如く構成せしめてある。 The configuration of the embodiment is as shown in FIGS. 1 and 2,
1 is the outer frame. Reference numeral 2 denotes an inner frame having a container-shaped bottom fixed to the outer frame 1 with a gap, and a heating plate 5 containing a heating element 4 is installed in the inner bottom of the inner frame 2. Reference numeral 6 denotes a heat-responsive switch that penetrates the center of the heating plate 5 and is provided so as to be freely retractable, and the heat-responsive switch 6 and the rice-cooking pot 10 are connected to the gap between the bottoms of the outer frame 1 and the inner frame 2. A rice cooking switch 7 is provided so as to be interlocked with a lever 9. Note that the thermally responsive switch 6 is of an automatic return type. 3
is an inner pot, placed on the heating plate 5 inside the inner frame 2, and boiling rice 13
and water 12 corresponding to the amount of rice.The upper opening surface is covered with an inner lid 16.The inner lid 16 is connected to a lid 15, and the lid 15 has one end pivoted to the outer frame 1 and can be opened and closed. This is what was made. 8 is a control device that houses electrical parts and an electrical circuit section to be described later;
It is installed by being attached to the outer wall of the outer frame 1. Reference numeral 11 denotes a temperature detecting element, which extends beyond a certain distance from the heating element 4 and is located on the outer periphery of the side surface of the inner pot 3 corresponding to the area between the water surface A for small rice cooking amount and the water surface B for large rice cooking amount of the inner pot 3. It is provided so that the temperature sensing part is brought into contact with it and is elastically fixed to the inner frame 2. The configuration of the control device 8 is as shown in FIG. 2, and consists of a microcomputer 14 and peripheral circuits. Inside the microcomputer 14 shown here is an arithmetic logic circuit RAM.
(randon access memory), ROM (read only
The figure shows a so-called one-chip microcomputer, which is composed of memory, various registers, and an oscillator. The programs necessary for automatic rice cooking are processed and imprinted on a wafer in the ROM in the microcomputer 14 using mask processing. The temperature detector 11 is connected to input terminals O 1 to O 4 of the microcomputer 14 via an A/D converter 26 , and is encoded by the A/D converter 26 and input to the microcomputer 14 . A 4-bit binary number is output from the input terminals O1 to O4 , and the comparison circuit in the A/D converter 26 compares the analog value of the 4-bit binary code with the analog value from the temperature detector 11. The temperature data from the temperature detector 11 is read into the microcomputer 14 equivalently by determining the base number. The light emitting part of the photocoupler 22 and the resistor 24 are connected to the output terminal O0 of the microcomputer 14 via a driver 23, and the AC power supply 18 has a closed circuit of a heating element 4 and a semiconductor switch element 19, and the semiconductor switch element A circuit is connected to the gate of 19 to connect the DC power supply 20 between the AC power supply 18 and the semiconductor switch element 19 through a resistor 21 and a light receiving part of a photocoupler 22. Further, the other input terminal I1 is connected to a rice cooking switch 7 which is interlocked with the thermally responsive switch 6 via a resistor 25 and a chattering prevention circuit 17. In addition, when the rice cooking is completed by the microcomputer 14 and the rice cooking switch 7,
Outputs an OFF signal to stop driving the semiconductor switch element 19 and stop supplying rice cooking power to the heating element 4.
It is configured so that it is turned off. Furthermore, when the temperature detector 11 and the microcomputer 14 determine that the amount of rice being cooked is small, the semiconductor switch changes the energization ratio of ON and OFF of the rice cooking control signal so that the power is commensurate with the amount of rice being cooked. The device 19 is configured to be turned ON and OFF to supply appropriate power to the heating element 4.
次に上記のように構成した構造とその電気回路
の動作を第３図を併用して説明する。内鍋３に米
１３とそれに見合う水１２を入れてセツトして炊
飯ぼたん１０を押してレバー９を下げると炊飯ス
イツチ７の信号がマイクロコンピユータ１４に入
力されて、ROMにある自動炊飯プログラムの手
順に従つて炊飯が開始される。まず発熱体４に炊
飯量に関係なく一律電力を供給する。たとえば第
３図−ロのごとく最大電力WAの値とする炊飯制
御信号をマイクロコンピユータ１４から出力す
る。内鍋３の側面温度TS、米温TKおよび内鍋３
の底温度TMが第３図イ〜ハの如く温度上昇して
いき内鍋３の側面温度TSがT0の温度に達した時
点で発熱体４への電力を一定時間Ｔだけ中断し、
Ｔ時間後の側面温度TSが少目及び多目炊飯量Ａ
及びＢによつてそれぞれ異なる温度特性を示す。
今少目炊飯量Ａについて説明する。ROM内のプ
ログラムによつて炊飯開始後内鍋３の側面温度
TSは、時間t1でT0に達してから一定時間後のt2時
間で側面低下分温度TS(T)のデータをTaとしてマ
イクロコンピユータ１４内のRAMエリアにスト
アする。この側面低下分温度TS(T)の値はあらかじ
め炊飯量との相関関係を求めておきそのときの最
適電力と電力パタンを設定しておく。すなわち、
側面温度TSが通電中断中にＴ時間後に何度下が
つたかの側面低下分温度TS(T)のデータをマイクロ
コンピユータ１４に入力してROM内の炊飯量∝
１／TS(T)の関係をプログラム化した処理ルチンによ
つて炊飯量を自動的に認識する。炊飯電力をその
炊飯量に応じた適正電力WBに切りかえる炊飯制
御信号がマイクロコンピユータ１４から出力され
第３図ロのように時間t2で炊飯電力が変化する。
ひきつづき発熱体４からの熱をうけて、第３図ハ
のように米温TKが上り、沸とう時期の時間t3で
炊飯電力を蒸らし電力WCに切りかえる炊飯制御
信号がマイクロコンピユータ１４から出力され
る。内鍋３の底部に水分がなくなつて内鍋３の底
温度が急上昇して時間t5で熱応動開閉器６が作動
すると抵抗２５を通して炊飯スイツチ７の信号変
化がチヤタリング防止回路１７を介してマイクロ
コンピユータ１４の入力端子I1に入り、直ちに炊
飯完了であると認識して発熱体４への電力供給を
やめるためにマイクロコンピユータ１４から炊飯
量制御信号として「OFF」信号が出力される。
同様に多目炊飯量Ｂの場合についても、温度検出
器１１によつて、側面降下温度TS(T)のデータTb
を読みこみROM内のプログラムで自動的に炊飯
量を認識しそれぞれ最適電力と電力パターンが供
給されることになる。電力中断中に、内鍋３の側
面温度TSの側面降下温度TS(T)を測定することは
第１図に示すように水量の多少、すなわち、炊飯
量によつて水面の高さが違つてくるため、第１図
に示す温度検出器１１が内鍋３に当接する部分の
温度降下の仕方も違つてくる。これは炊飯量が少
ないときは水１２の水面Ａとなり低く内鍋３の側
面部分の放熱が早く内鍋３の側面の温度降下の仕
方が大きい。反対に炊飯量が多いときは水１２の
水面Ｂは温度検出器１１が内鍋３に当接する位置
よりも高くなつて、水１２の熱容量分が含まれる
だけ放熱が遅くなりしたがつて内鍋３側面の温度
降下も遅くなることになる。この場合、発熱体４
からある一定距離以上へだてた内鍋３の側面外周
部の高さにして炊飯量による温度降下差は大きく
することができるが内鍋３の底面でも温度降下差
が少なくなるが検出可能である。このように炊飯
量に従つて、温度検出器１１が当接する内鍋３の
側面温度TSを測定し、電力中断中にその温度低
下分によつて、あらかじめ操作ぼたん１０等のセ
ツトする必要なく自動的に炊飯量が判断できるの
で使用者はただ炊飯ぼたん１０を押すだけで炊飯
の工程をプログラムに従つて進行することにな
る。又内鍋３の側面温度TSがT0に達する経過時
間t1まで、一定電力が与えられることにより第３
図−ハに図示する如く40℃位まで水温を上げて吸
水を順調に進行させ、膨潤させることができる。
さらに、炊飯量に応じた最適な電力が供給でき米
温の立上り特性も炊飯量による影響も少なく抑え
られ十分α化に必要な温度98℃以上保持できるの
でおいしいごはんが炊けることになる。 Next, the structure configured as described above and the operation of its electric circuit will be explained with reference to FIG. Put rice 13 and water 12 corresponding to it in the inner pot 3, set it, press the rice cooker button 10 and lower the lever 9, the signal from the rice cooker switch 7 will be input to the microcomputer 14, and the automatic rice cooking program procedure in the ROM will be executed. Therefore, cooking of rice is started. First, power is uniformly supplied to the heating element 4 regardless of the amount of rice cooked. For example, as shown in FIG. 3-B, the microcomputer 14 outputs a rice cooking control signal having the value of the maximum electric power W A. Side temperature T S of inner pot 3, rice temperature T K and inner pot 3
The bottom temperature T M of the inner pot 3 rises as shown in Figure 3 A to C, and when the side temperature T S of the inner pot 3 reaches the temperature T 0 , the power to the heating element 4 is interrupted for a certain period of time T. ,
Side temperature T S after T time is less and more rice cooking amount A
and B exhibit different temperature characteristics.
Now, the amount A of cooked rice will be explained. The side temperature of the inner pot 3 after the start of cooking is determined by the program in the ROM.
T S stores the data of the side temperature drop T S (T) as T a in the RAM area of the microcomputer 14 at time t 2 , which is a predetermined time after reaching T 0 at time t 1 . The value of this side temperature drop T S (T) is correlated with the amount of rice cooked in advance, and the optimum power and power pattern at that time are set. That is,
The data of the side temperature T S (T), which is the number of times the side temperature T S decreased after T hours during the interruption of power supply, is input into the microcomputer 14 and the amount of cooked rice in the ROM is calculated.
The amount of rice to be cooked is automatically recognized by a processing routine in which the relationship of 1/T S(T) is programmed. A rice cooking control signal for switching the rice cooking power to an appropriate power W B corresponding to the amount of rice to be cooked is output from the microcomputer 14, and the rice cooking power changes at time t2 as shown in FIG. 3B.
Continuing to receive heat from the heating element 4, the rice temperature TK rises as shown in Fig. 3C, and at time t3 during the boiling period, a rice cooking control signal is sent from the microcomputer 14 to switch the rice cooking power to the steaming power WC . Output. When there is no moisture at the bottom of the inner pot 3 and the temperature at the bottom of the inner pot 3 rises rapidly, and the heat-responsive switch 6 is activated at time t5 , the signal change of the rice cooking switch 7 is transmitted through the resistor 25 to the chattering prevention circuit 17. The signal is input to the input terminal I1 of the microcomputer 14, and an "OFF" signal is output as a rice cooking amount control signal from the microcomputer 14 in order to immediately recognize that rice cooking is complete and stop supplying power to the heating element 4.
Similarly, in the case of multiple rice cooking amount B, the temperature detector 11 detects data T b of the side temperature drop T S (T).
The program in the ROM automatically recognizes the amount of rice to be cooked, and the optimal power and power pattern are supplied accordingly. Measuring the side temperature drop T S (T) of the side temperature T S of the inner pot 3 during the power interruption is as shown in Figure 1. Because of this difference, the way the temperature drops at the portion where the temperature detector 11 contacts the inner pot 3 shown in FIG. 1 also differs. This is because when the amount of rice to be cooked is small, the water level A of the water 12 is low, and the heat dissipation from the side surface of the inner pot 3 is rapid, and the temperature drop on the side surface of the inner pot 3 is large. On the other hand, when the amount of rice to be cooked is large, the water surface B of the water 12 is higher than the position where the temperature sensor 11 contacts the inner pot 3, and the heat dissipation is slowed down by the amount of heat capacity of the water 12 included. The temperature drop on the three sides will also be slower. In this case, the heating element 4
The difference in temperature drop depending on the amount of rice cooked can be increased by increasing the height of the outer periphery of the side surface of the inner pot 3 that extends beyond a certain distance from the inner pot 3, but the difference in temperature drop depending on the amount of rice cooked can also be reduced but still detectable at the bottom surface of the inner pot 3. In this way, the temperature sensor 11 measures the temperature T S of the side surface of the inner pot 3 in contact with the amount of rice cooked, and the temperature drop during the power interruption eliminates the need to set the operation button 10 in advance. Since the amount of rice to be cooked can be determined automatically, the user simply presses the rice cooking button 10 to proceed with the rice cooking process according to the program. In addition, a constant electric power is applied until the side temperature T S of the inner pot 3 reaches T 0 , and the third
As shown in Figure C, the water temperature can be raised to about 40°C to smoothly absorb water and cause swelling.
Furthermore, it supplies the optimum amount of power according to the amount of rice being cooked, minimizes the influence of the rise in rice temperature and the amount of rice cooked, and maintains the temperature above 98°C, which is necessary for sufficient gelatinization, so delicious rice can be cooked.
本考案によれば発熱体からある一定距離以上へ
だてた内鍋の外周部又は外周底部に感温部を設け
た温度検出器と、内鍋を加熱する発熱体をスイツ
チ素子によつて調整する調整手段と、炊飯スイツ
チからの動作開始信号を出力する信号発生手段
と、前記温度検出手段と調整手段と信号発生手段
および炊飯動作処理を司どるマイクロコンピユー
タとからなる電気炊飯器において、炊飯スイツチ
を動作させてから発熱体に炊飯量に関係なく一律
の電力を供給し、温度検出器がある一定温度T0
を検出した後、ある一定時間だけ電力の供給を中
止し前記一定時間後の温度Taを検出しT0−Taの
温度差によつて炊飯量を判断し次工程の電力量を
きめるような炊飯動作処理をマイクロコンピユー
タに設けたことにより、自動的に炊飯量を判断し
炊飯量に応じた最適な電力を供給し、α化に必要
な温度を確保することができ、煩雑性、誤操作も
なくする効果があり、美味しいご飯を炊くことが
できるものである。 According to the present invention, a temperature sensor is provided with a temperature sensing part on the outer periphery or the bottom of the outer periphery of the inner pot that extends beyond a certain distance from the heating element, and a switch element is used to adjust the heating element that heats the inner pot. an electric rice cooker comprising: a signal generating means for outputting an operation start signal from the rice cooking switch; a microcomputer for controlling the temperature detecting means, the adjusting means, the signal generating means and the rice cooking operation; After that, uniform power is supplied to the heating element regardless of the amount of rice cooked, and the temperature sensor is set at a constant temperature T 0
After detecting the temperature, the power supply is stopped for a certain period of time, the temperature Ta after the certain period of time is detected, and the amount of rice to be cooked is determined based on the temperature difference of T 0 - Ta , and the amount of electric power for the next process is determined. By installing the rice cooking operation processing in a microcomputer, it can automatically determine the amount of rice to be cooked, supply the optimal power according to the amount of rice, and secure the temperature necessary for gelatinization, reducing complexity and operation errors. It has the effect of eliminating waste, and allows you to cook delicious rice.
第１図は本考案の一実施例を示す電気炊飯器の
断面図、第２図は同電気炊飯器の電気回路図、第
３図−イ、−ロ、−ハは同電気炊飯器の炊飯特性図
である。
３……内鍋、４……発熱体、６……熱応動開閉
器、７……炊飯スイツチ、１４……マイクロコン
ピユータ、１１……温度検出器、１７……チヤタ
リング防止回路、１８……交流電源、２１，２
４，２５……抵抗、１９……半導体スイツチ素
子、２２……フオトカプラ、２３……トライバ、
Ａ……少目炊飯量の水面、Ｂ……多目炊飯量の水
面、TS……内鍋の側面温度、TS(T)……内鍋の側
面低下分温度、WB……適正電力、WC……蒸らし
電力。
Fig. 1 is a sectional view of an electric rice cooker showing an embodiment of the present invention, Fig. 2 is an electric circuit diagram of the electric rice cooker, and Figs. It is a characteristic diagram. 3... Inner pot, 4... Heating element, 6... Heat-responsive switch, 7... Rice cooking switch, 14... Microcomputer, 11... Temperature detector, 17... Chattering prevention circuit, 18... Alternating current power supply, 21,2
4, 25...Resistor, 19...Semiconductor switch element, 22...Photocoupler, 23...Tribar,
A...Water surface for small amount of rice cooking, B...Water surface for large amount of rice cooking, TS...Side temperature of inner pot, T S(T) ...Temperature lowered on side of inner pot, W B ...Appropriate power , W C ...Steaming power.
Claims (1)
の外周部又は外周底部に温度検出器１１の感温部
を設けた温度検出手段と、内鍋３を加熱する発熱
体４をスイツチ素子１９によつて調整する調整手
段と、炊飯スイツチ７からの動作開始信号を出力
する信号発生手段と、前記温度検出手段と調整手
段と信号発生手段および炊飯動作処理を司どるマ
イクロコンピユータ１４とからなる電気炊飯器に
おいて、炊飯スイツチ７を動作させてから、発熱
体４に炊飯量に関係なく一律の電力を供給し、温
度検出器１１がある一定温度T0を検出した後、
ある一定時間だけ電力の供給を中止し前記一定時
間後の温度Taを検出し、T0−Taの温度差によつ
て炊飯量を判断し次工程の電力量をきめるような
炊飯動作処理をマイクロコンピユータ１４に設け
たことを特徴とする電気炊飯器。 Inner pot 3 extending beyond a certain distance from heating element 4
temperature detecting means provided with a temperature sensing part of a temperature detector 11 on the outer periphery or the outer periphery bottom; an adjusting means for adjusting the heating element 4 that heats the inner pot 3 by a switch element 19; In an electric rice cooker consisting of a signal generating means for outputting an operation start signal, the temperature detecting means, the adjusting means, the signal generating means, and a microcomputer 14 that controls the rice cooking process, the rice cooker switch 7 is operated and then the heat is generated. After uniform power is supplied to the body 4 regardless of the amount of rice cooked, and the temperature detector 11 detects a certain temperature T 0 ,
A rice cooking operation process in which the supply of electricity is stopped for a certain period of time, the temperature T a after the certain period of time is detected, the amount of rice to be cooked is determined based on the temperature difference of T 0 - T a , and the amount of electric power for the next process is determined. An electric rice cooker characterized in that a microcomputer 14 is provided with:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13209081U JPS5837820U (en) | 1981-09-05 | 1981-09-05 | electric rice cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13209081U JPS5837820U (en) | 1981-09-05 | 1981-09-05 | electric rice cooker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5837820U JPS5837820U (en) | 1983-03-11 |
| JPH0114251Y2 true JPH0114251Y2 (en) | 1989-04-26 |
Family
ID=29925635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13209081U Granted JPS5837820U (en) | 1981-09-05 | 1981-09-05 | electric rice cooker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5837820U (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59192317A (en) * | 1983-04-15 | 1984-10-31 | タイガー魔法瓶株式会社 | Rice cookr having automatic rice cooking amount judging function |
| JPS60137326A (en) * | 1983-12-26 | 1985-07-20 | 象印マホービン株式会社 | Rice cooking jar |
| JPS61159917A (en) * | 1985-01-09 | 1986-07-19 | 松下電器産業株式会社 | Electric rice cooker |
| JPH01164318A (en) * | 1987-12-21 | 1989-06-28 | Tiger Vacuum Bottle Co Ltd | Microcomputer-controlled rice cooker |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5645431B2 (en) * | 1974-06-07 | 1981-10-26 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6018184Y2 (en) * | 1979-09-14 | 1985-06-03 | 株式会社日立ホームテック | electric rice cooker |
| JPS6020969Y2 (en) * | 1979-12-24 | 1985-06-22 | 株式会社日立ホームテック | electric rice cooker |
-
1981
- 1981-09-05 JP JP13209081U patent/JPS5837820U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5645431B2 (en) * | 1974-06-07 | 1981-10-26 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5837820U (en) | 1983-03-11 |
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