JPH0724618B2 - rice cooker - Google Patents
rice cookerInfo
- Publication number
- JPH0724618B2 JPH0724618B2 JP1061287A JP1061287A JPH0724618B2 JP H0724618 B2 JPH0724618 B2 JP H0724618B2 JP 1061287 A JP1061287 A JP 1061287A JP 1061287 A JP1061287 A JP 1061287A JP H0724618 B2 JPH0724618 B2 JP H0724618B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- heater
- spillage
- inner pot
- rice
- 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 - Lifetime
Links
Landscapes
- Cookers (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、吹きこぼれを検出してヒータの発熱量を小さ
くすることにより、吹きこぼれを抑止するようにした炊
飯器に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice cooker capable of suppressing spillage by detecting spillage and reducing the amount of heat generated by a heater.
従来の技術 従来の炊飯器においては、白米，炊きこみ，玄米，おか
ゆ等の炊飯コースを使用者が選択して炊飯させる、いわ
ゆる炊き分け炊飯器はあったが、吹きこぼれを検出する
ものはなかった。2. Description of the Related Art Conventional rice cookers have a so-called separate rice cooker in which a user selects a rice cooking course such as white rice, rice cooked, brown rice, and porridge to cook rice, but there is no rice cooker that detects spillage. .
発明が解決しようとする問題点 このような従来のものにおいては、使用者が誤っておか
ゆ以外のコースでおかゆを炊飯した場合に、多量の吹き
こぼれが生じて炊飯器及びその周囲を汚してしまうとい
う問題があった。またこの吹きこぼれは非常に熱いため
に、使用者にやけどを負わせるという危険性もあった。Problems to be Solved by the Invention In such a conventional one, when the user mistakenly cooks porridge in a course other than porridge, a large amount of spillage occurs and the rice cooker and its surroundings are contaminated. There was a problem. Moreover, since the spilled gas is very hot, there is a risk that the user will be burned.
本発明は上記の問題点に鑑みてなされたもので、吹きこ
ぼれの初期にこれを検出し、ヒータの発熱量を小さくし
て吹きこぼれを抑止する炊飯器を提供することを目的と
するものである。The present invention has been made in view of the above problems, and an object of the present invention is to provide a rice cooker that detects spillage at an early stage and reduces the heat generation amount of a heater to suppress spillage.
問題点を解決するための手段 上記問題点を解決するために本発明は、蓋に設けられた
蒸気穴の近傍に温度検出素子を埋設し、この温度検出素
子を使って吹きこぼれによる温度上昇を検出する温度検
出手段の出力を加熱制御手段に入力することにより、ヒ
ータの発熱量を制御するようにしたものである。Means for Solving the Problems In order to solve the above problems, the present invention embeds a temperature detecting element in the vicinity of a vapor hole provided in a lid, and detects the temperature rise due to spillage using this temperature detecting element. The heating amount of the heater is controlled by inputting the output of the temperature detecting means to the heating control means.
作用 本発明は上記した構成とすることにより、吹きこぼれが
生じると、温度検出素子の温度が上昇し、この温度検出
素子の出力を入力している加熱制御手段がヒータを制御
して発熱量を小さくし、以後の吹きこぼれを抑止できる
ものである。With the above configuration of the present invention, when a spillage occurs, the temperature of the temperature detection element rises, and the heating control means inputting the output of this temperature detection element controls the heater to reduce the amount of heat generation. However, it is possible to prevent the subsequent spillage.
実施例 以下、本発明の一実施例を添付図面にもとづいて説明す
る。第１図において、１は米と水を入れる内鍋、２は内
鍋１を加熱するヒータである。３は内鍋１を収容する外
筐体、４は外筐体３の上方に位置して開閉自在に設けら
れた蓋である。５は蓋４に設けられた蒸気穴で、内鍋１
の内容物が沸謄したときに蒸気を外へ逃がすものであ
る。６は温度検出素子で、この温度検出素子６は蒸気穴
５に近づけて蓋４に埋設されており、前記内鍋１の内容
物が吹きこぼれたときに生じる温度上昇を検出する。７
は炊飯終了を検出する炊飯終了検出手段である。Embodiment One embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, 1 is an inner pot for containing rice and water, and 2 is a heater for heating the inner pot 1. Reference numeral 3 denotes an outer casing that accommodates the inner pot 1, and 4 denotes a lid that is located above the outer casing 3 and that is openably and closably provided. Reference numeral 5 is a steam hole provided in the lid 4, and the inner pot 1
When the contents of boil off, steam is released to the outside. Reference numeral 6 denotes a temperature detecting element, which is embedded in the lid 4 close to the steam hole 5 and detects a temperature rise caused when the contents of the inner pot 1 are spilled. 7
Is a rice cooking end detecting means for detecting the end of rice cooking.
第２図は本発明の一実施例における炊飯器の回路構成を
示したもので、温度検出素子６と抵抗８によって分圧さ
れた電位はコンパレータ９に入力され、抵抗10と抵抗11
によって作られる基準電位と比較される。12は加熱制御
手段で、この加熱制御手段12はコンパレータ９の出力に
もとづいてヒータ２の発熱量を制御する。13はリレー、
14はリレー駆動用のトランジスタ、15はリレー電源であ
る。ここで加熱制御手段12はマイクロプロセッサ16によ
り実現している。FIG. 2 shows the circuit configuration of the rice cooker in one embodiment of the present invention. The potential divided by the temperature detecting element 6 and the resistor 8 is input to the comparator 9, and the resistor 10 and the resistor 11 are connected.
Is compared to a reference potential created by. A heating control unit 12 controls the amount of heat generated by the heater 2 based on the output of the comparator 9. 13 is a relay,
Reference numeral 14 is a transistor for driving a relay, and 15 is a relay power supply. Here, the heating control means 12 is realized by the microprocessor 16.
上記構成において、次にその動作を説明する。まず炊飯
を開始すると、ヒータ２により加熱されて内鍋１及びそ
の内容物の温度が上昇するが、蒸気穴５と温度検出素子
６は外気に触れているため、温度上昇はほとんどない。
次に内鍋１の内容物が沸謄すると蒸気が蒸気穴５を通じ
て外へ出るため、蒸気穴５の温度は高温になるが、蒸気
は蒸気穴５から上方へ逃げるため、温度検出素子６はほ
とんど温度上昇しない。ところが、吹きこぼれが生じる
と、蒸気穴５から吹き出した吹きこぼれは横に広がって
温度検出素子６の上に達するため、温度検出素子６の温
度は急に高温になる。ここで温度検出素子６は負の温度
係数を有するサーミスタを使用しているため、第２図に
おいて、抵抗８との分圧電位は吹きこぼれによって急に
高くなる。この電位の上昇が基準電位と交差するよう抵
抗10と抵抗11の抵抗値を選び、吹きこぼれによってコン
パレータ９の出力がLowからHighに変化するように構成
している。加熱制御手段12はコンパレータ９の出力がHi
ghになると、ヒータ２の通電時間比率が小さくなるよう
にトランジスタ14を駆動してヒータ２の平均発熱量を小
さくし、吹きこぼれを抑止する。Next, the operation of the above configuration will be described. First, when rice cooking is started, the temperature of the inner pot 1 and its contents rises due to heating by the heater 2, but the temperature hardly rises because the steam hole 5 and the temperature detecting element 6 are in contact with the outside air.
Next, when the contents of the inner pot 1 boil, the steam goes out through the steam hole 5, so the temperature of the steam hole 5 becomes high, but the steam escapes upward from the steam hole 5, so the temperature detecting element 6 Almost no temperature rise. However, when a spillage occurs, the spillage blown out from the steam hole 5 spreads laterally and reaches the temperature detection element 6, so that the temperature of the temperature detection element 6 suddenly rises to a high temperature. Here, since the temperature detecting element 6 uses a thermistor having a negative temperature coefficient, in FIG. 2, the potential divided with the resistor 8 suddenly rises due to spillage. The resistance values of the resistors 10 and 11 are selected so that the rise of this potential intersects with the reference potential, and the output of the comparator 9 changes from Low to High due to spillage. The output of the comparator 9 of the heating control means 12 is Hi.
When it becomes gh, the transistor 14 is driven so that the energization time ratio of the heater 2 becomes small, the average heat generation amount of the heater 2 becomes small, and blowout is suppressed.
第３図は加熱制御手段12の処理の流れを示すフローチャ
ートで、ステップ20で所定の通電比率t1/Tを定めた後、
加熱を開始する。ステップ22では第１図の炊飯終了検出
手段７の出力にもとづいて炊飯終了のチェックを行な
う。ステップ23で、前述したコンパレータ９の出力によ
って吹きこぼれの有無をチェックし、吹きこぼれが生じ
ると通電比率をt2/T（t2＜t1）に抑える。FIG. 3 is a flow chart showing the flow of processing of the heating control means 12. After the predetermined energization ratio t 1 / T is determined in step 20,
Start heating. In step 22, the completion of rice cooking is checked based on the output of the rice cooking completion detecting means 7 shown in FIG. In step 23, the presence or absence of spillage is checked by the output of the comparator 9 described above, and if spillage occurs, the energization ratio is suppressed to t 2 / T (t 2 <t 1 ).
発明の効果 以上のように本発明によれば、使用者がうっかりおかゆ
を誤った炊飯コースで炊飯しても、吹きこぼれの開始時
点で直ちにこれを検出してヒータの発熱量を小さくする
ことにより吹きこぼれを抑止できるようにしているた
め、その効果はきわめて有用である。また本発明によれ
ば、おかゆに限らず、あらゆる炊飯に対しても吹きこぼ
れを抑止できるもので、その実用的効果は大きいもので
ある。As described above, according to the present invention, even if the user inadvertently cooks rice porridge on the wrong rice cooking course, the spillage is immediately detected at the start of the spillage and the heat generation amount of the heater is reduced. The effect is extremely useful because it makes it possible to suppress Further, according to the present invention, spillage can be suppressed not only for porridge but also for any kind of rice cooking, and its practical effect is great.
第１図は本発明の一実施例を示す炊飯器の断面図、第２
図は同炊飯器の回路図、第３図は加熱制御手段の処理の
流れを示すフローチャートである。 １……内鍋、２……ヒータ、３……外筐体、４……蓋、
５……蒸気穴、６……温度検出素子、12……加熱制御手
段。1 is a sectional view of a rice cooker showing an embodiment of the present invention, FIG.
FIG. 3 is a circuit diagram of the rice cooker, and FIG. 3 is a flow chart showing a processing flow of the heating control means. 1 ... inner pot, 2 ... heater, 3 ... outer casing, 4 ... lid,
5 ... Steam hole, 6 ... Temperature detecting element, 12 ... Heating control means.
Claims (1)
るヒータと、前記内鍋を収容する外筐体の上方に位置す
る開閉自在の蓋の一部に設けられた蒸気穴と、この蒸気
穴の近傍に埋設された温度検出素子とコンパレータによ
り吹きこぼれによる温度上昇を検出する温度検出手段
と、この温度検出手段の出力を入力として前記ヒータを
制御する加熱制御手段とを有し、前記内鍋の内容物が沸
謄により吹きこぼれて前記温度検出素子の温度が上昇す
ると前記ヒータの発熱量を小さくすることを特徴とする
炊飯器。1. An inner pot for containing rice and water, a heater for heating the inner pot, and a steam hole provided in a part of an openable lid which is located above an outer casing for containing the inner pot. And a temperature detecting means embedded in the vicinity of the steam hole and a temperature detecting means for detecting a temperature rise due to spillage by a comparator, and a heating control means for controlling the heater by using an output of the temperature detecting means as an input. A rice cooker characterized in that when the contents of the inner pot are blown off by boiling and the temperature of the temperature detecting element rises, the heat generation amount of the heater is reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1061287A JPH0724618B2 (en) | 1987-01-20 | 1987-01-20 | rice cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1061287A JPH0724618B2 (en) | 1987-01-20 | 1987-01-20 | rice cooker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63181715A JPS63181715A (en) | 1988-07-26 |
| JPH0724618B2 true JPH0724618B2 (en) | 1995-03-22 |
Family
ID=11755063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1061287A Expired - Lifetime JPH0724618B2 (en) | 1987-01-20 | 1987-01-20 | rice cooker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0724618B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0436922U (en) * | 1990-07-26 | 1992-03-27 |
-
1987
- 1987-01-20 JP JP1061287A patent/JPH0724618B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63181715A (en) | 1988-07-26 |
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