JP3070289B2 - Electromagnetic cooker - Google Patents
Electromagnetic cookerInfo
- Publication number
- JP3070289B2 JP3070289B2 JP23910792A JP23910792A JP3070289B2 JP 3070289 B2 JP3070289 B2 JP 3070289B2 JP 23910792 A JP23910792 A JP 23910792A JP 23910792 A JP23910792 A JP 23910792A JP 3070289 B2 JP3070289 B2 JP 3070289B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- abnormal heating
- oil
- detecting element
- slope
- 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 - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は鍋及び被調理物に応じた
異常加熱防止温度を決定する電磁調理器に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic cooker for determining an abnormal heating prevention temperature according to a pot and an object to be cooked.
【０００２】[0002]
【従来の技術】従来の電磁調理器は異常加熱防止のため
に、温度検出素子の検出温度がある値になったとき加熱
パワーを弱めるものであり、鍋や被調理物によらずに一
定の異常加熱防止温度を持つものであった。2. Description of the Related Art In order to prevent abnormal heating, a conventional electromagnetic cooker weakens heating power when a temperature detected by a temperature detecting element reaches a certain value. It had an abnormal heating prevention temperature.
【０００３】[0003]
【発明が解決しようとする課題】従来の電磁調理器は、
鍋や被調理物によらない一定の異常加熱防止温度を持つ
ものであったが、温度検出素子は鍋温度をプレート下で
測定するため、そりのある鍋の場合、鍋温度の測定が正
確にできず、そのためそりのある鍋では異常加熱防止が
できないという課題を有している。また、そりの無い鍋
の場合も、鍋の中の油量によって異常加熱防止のパワー
コントロールが始まる油温が異なるという課題を有して
いる。A conventional electromagnetic cooker is:
Although it had a certain abnormal heating prevention temperature regardless of the pot or the cooking object, the temperature detection element measures the pot temperature under the plate, so in the case of a pot with a sled, the measurement of the pot temperature is accurate. There is a problem that it is not possible to prevent abnormal heating in a pot with a sled. In addition, a pot without a sled also has a problem that the oil temperature at which power control for preventing abnormal heating starts differs depending on the amount of oil in the pot.
【０００４】本発明はこのような従来の課題を解決しよ
うとするものであって、底にそりのある鍋の油の異常加
熱を防止する機能を備えた電磁調理器を提供することを
第一の目的とするものである。[0004] The present invention is to solve such a conventional problem, and the first object of the present invention is to provide an electromagnetic cooker having a function of preventing abnormal heating of oil in a pot having a sled at the bottom. It is the purpose of.
【０００５】また、底にそりのある鍋の油の異常加熱を
防止し、かつ、水の加熱を妨げない機能を備えた電磁調
理器を提供することを第二の目的とするものである。It is a second object of the present invention to provide an electromagnetic cooker having a function of preventing abnormal heating of oil in a pot with a sled at the bottom and not obstructing heating of water.
【０００６】さらに、底にそりのない鍋の油の異常加熱
を防止する機能を備えた電磁調理器を提供することを第
三の目的とするものである。It is a third object of the present invention to provide an electromagnetic cooker having a function of preventing abnormal heating of oil in a pot having no warped bottom.
【０００７】[0007]
【課題を解決するための手段】前記第一の目的を達成す
るための本発明の第一の手段は、加熱コイルと、この加
熱コイルを制御する制御手段と、鍋を載せるプレート
と、鍋の温度を検出し制御手段に信号を送る温度検出素
子と、時間を計測し制御手段に信号を送る計時手段と、
温度検出素子の検出値の傾きから底にそりのある鍋の油
の異常加熱を防止する信号を制御手段に送る第一の異常
加熱防止手段とを備え、前記第一の異常加熱防止手段
は、温度検出素子による温度と計時手段による時間より
温度上昇の傾きｔを求め、この温度上昇の傾きに応じて
異常加熱を防止するためのパワーダウ ン温度Ｔを決定
し、温度検出素子の温度がＴになると前記加熱コイルか
らの加熱量を低減させることを特徴とし、前記温度上昇
の傾きは、鍋内の油の量が前記温度検出素子の温度変化
に影響しない温度領域で検出し、温度上昇の傾きｔがゆ
るやかであるほどＴを低くする電磁調理器とするもので
ある。The first object of the present invention for achieving the first object is to provide a heating coil, control means for controlling the heating coil, a plate on which the pan is placed, and a pan for the pan. A temperature detecting element for detecting a temperature and sending a signal to the control means, and a timing means for measuring time and sending a signal to the control means,
First abnormal heating prevention means for sending to the control means a signal for preventing abnormal heating of oil in a pot with a sled at the bottom from the inclination of the detection value of the temperature detecting element, the first abnormal heating preventing means
Is calculated from the temperature measured by the temperature detection element and the time measured by the timer.
The slope t of the temperature rise is obtained, and according to the slope of the temperature rise,
Determining a power-down temperature T for preventing abnormal heating
When the temperature of the temperature detecting element reaches T, the heating coil
Characterized in that the amount of heating is reduced,
The slope of the temperature change of the temperature sensor
Is detected in a temperature range that does not affect the
An electromagnetic cooker in which T becomes lower as it becomes gentler .
【０００８】また、前記の第二の目的を達成するための
本発明の第二の手段は、第一の手段に加え、第二の異常
加熱防止手段を備え、前記第二の異常加熱防止手段は温
度上昇の傾きｔの時間変化ｄｔを求め、ｔを求めた後の
ｄｔが小さいほどＴを低くする電磁調理器とするもので
ある。[0008] The second means of the present invention for attaining the second object includes a second abnormality in addition to the first means.
Heating prevention means, wherein the second abnormal heating prevention means is
The time change dt of the slope t of the degree rise is obtained, and after the t is obtained,
An electromagnetic cooker in which T decreases as dt decreases .
【０００９】さらに、前記の第三の目的を達成するため
の本発明の第三の手段は、第一または二の手段に加え、
第三の異常加熱防止手段を備え、第三の異常加熱防止手
段は、鍋内の油の量が前記温度検出素子の温度変化に影
響を与える温度領域で温度上昇の傾きｔを求め、このｔ
が長いほどＴを高くする電磁調理器とするものである。Further, the third means of the present invention for achieving the above third object includes, in addition to the first or second means,
A third abnormal heating prevention means is provided.
The stage shows that the amount of oil in the pan affects the temperature change of the temperature detecting element.
The temperature rise slope t is determined in the temperature range where
The electromagnetic cooker in which T is increased as is longer .
【００１０】[0010]
【作用】本発明の第一の手段は、温度検出素子の検出値
の傾きから第一の異常加熱防止手段が、温度検出素子に
よる温度と計時手段による時間より温度上昇の傾きｔを
求め、この温度上昇の傾きに応じて異常加熱を防止する
ためのパワーダウン温度Ｔを決定し、温度検出素子の温
度がＴになると前記加熱コイルからの加熱量を低減させ
ることを特徴とし、前記温度上昇の傾きは、鍋内の油の
量が前記温度検出素子の温度変化に影響しない温度領域
で検出し、温度上昇の傾きｔがゆるやかであるほどＴを
低くすることで底にそりのある鍋の油の異常加熱を防止
するものである。According to the first means of the present invention, the first abnormal heating prevention means is provided on the temperature detecting element based on the gradient of the detected value of the temperature detecting element.
The slope t of the temperature rise from the temperature by the
To prevent abnormal heating according to the slope of this temperature rise.
Power-down temperature T to determine the temperature of the temperature detection element.
When the temperature reaches T, the amount of heating from the heating coil is reduced.
Characterized in that the slope of the temperature rise is the oil in the pot
Temperature range where the amount does not affect the temperature change of the temperature detecting element
, And as the slope t of the temperature rise becomes gentler,
By lowering it, abnormal heating of the oil in a pot with a sled at the bottom is prevented.
【００１１】また、本発明の第二の手段は、温度検出素
子の検出値の傾きと傾きの時間変化から第二の異常加熱
防止手段が、温度上昇の傾きｔの時間変化ｄｔを求め、
ｔを求めた後のｄｔが小さいほどＴを低くすることで、
底にそりのある鍋の油の異常加熱を防止し、かつ、水の
加熱を妨げないものである。According to a second means of the present invention, the second abnormal heating prevention means obtains a time change dt of a temperature rise slope t from a slope of the detected value of the temperature detecting element and a time change of the slope.
By making T smaller as dt after obtaining t is smaller,
It prevents abnormal heating of oil in a pot with a sled at the bottom and does not prevent heating of water.
【００１２】さらに、本発明の第三の手段は、温度検出
素子の検出値の傾きから第三の異常加熱防止手段が、鍋
内の油の量が前記温度検出素子の温度変化に影響を与え
る温度領域で温度上昇の傾きｔを求め、このｔが長いほ
どＴを高くすることで、底にそりのない鍋の油の異常加
熱を防止するものである。Further, the third means of the present invention is that the third abnormal heating preventing means comprises a pot based on a gradient of a detection value of the temperature detecting element.
The amount of oil in the inside affects the temperature change of the temperature detecting element.
The slope t of the temperature rise is found in the temperature range where
By increasing T, it is possible to prevent abnormal heating of the oil in the pot without a sled at the bottom.
【００１３】[0013]
【実施例】本発明の第一の手段の実施例を図１、図２、
図３を基に説明する。先ず図１に基づいて本実施例の全
体構成について説明する。１は本体で、上部にはプレー
ト２を有している。プレート２の下部には加熱コイル３
と、鍋５の温度を検出するサーミスタ等の温度検出素子
４とを備えている。鍋５はプレート２の上に載せて使用
する。また本体１は、時間を計測する計時手段６と、加
熱コイル３を制御する制御手段７を備えている。温度検
出素子４による温度と計時手段６による時間は、前記制
御手段７に送られ、この信号によって加熱コイル３が制
御される。さらに、本体１は第一の異常加熱防止手段８
を備えている。第一の異常加熱防止手段８は温度検出素
子４による温度と計時手段６による時間より求めた傾き
ｔから、異常加熱を防止するためのパワーダウン温度Ｔ
を決定し、温度検出素子４の温度がＴになると制御手段
７にパワーダウン命令を送る。計時手段６・制御手段７
・第一の異常加熱防止手段８は、本実施例ではマイクロ
コンピュータで構成している。1 and 2 show an embodiment of the first means of the present invention.
This will be described with reference to FIG. First, the overall configuration of the present embodiment will be described with reference to FIG. Reference numeral 1 denotes a main body, which has a plate 2 on an upper portion. Heating coil 3 at the bottom of plate 2
And a temperature detecting element 4 such as a thermistor for detecting the temperature of the pan 5. The pan 5 is used by placing it on the plate 2. Further, the main body 1 includes a time measuring means 6 for measuring time and a control means 7 for controlling the heating coil 3. The temperature by the temperature detecting element 4 and the time by the timer 6 are sent to the controller 7, and the heating coil 3 is controlled by this signal. Further, the main body 1 is provided with first abnormal heating prevention means 8.
It has. The first abnormal heating prevention means 8 calculates a power down temperature T for preventing abnormal heating from the temperature t by the temperature detecting element 4 and the slope t obtained from the time by the time measuring means 6.
Is determined, and when the temperature of the temperature detecting element 4 becomes T, a power down command is sent to the control means 7. Clocking means 6 and control means 7
The first abnormal heating prevention means 8 is constituted by a microcomputer in this embodiment.
【００１４】以下、本実施例の動作を説明する。使用者
は、油を鍋５に入れ、プレート２の上にセットする。次
に、使用者が図示されていないスイッチを入れ、調理を
開始すると制御手段７は加熱コイル３をフルパワーで動
作させる。加熱コイル３により作られる磁界により鍋５
に渦電流が起こり鍋５の中の油が加熱される。油の温度
上昇は鍋５を通じて温度検出素子４で検出される。ここ
で、図１に示すように鍋５の底がそっている場合、そり
の程度に応じて油温の上昇に対する温度検出素子４の追
随性が異なる。つまり、油温が上がっていても、鍋５の
そりが大きいほど温度検出素子４の検出値の上昇が遅く
なる。しかし、油温の上昇を放置して油の発火温度を越
えると火災の原因となる。そこで、第一の異常加熱防止
手段８は温度検出素子４による温度と計時手段６による
時間より求めた傾きから、異常加熱を防止するためのパ
ワーダウン温度Ｔを決定し、温度検出素子４の温度がＴ
になると制御手段７にパワーダウン命令を送る。つま
り、底にそりのある鍋の油の異常加熱を防止する機能を
備えた電磁調理器として動作する。The operation of this embodiment will be described below. The user puts the oil in the pot 5 and sets it on the plate 2. Next, when the user turns on a switch (not shown) and starts cooking, the control means 7 operates the heating coil 3 at full power. Pot 5 due to the magnetic field created by heating coil 3
Then, an eddy current occurs and the oil in the pan 5 is heated. The temperature rise of the oil is detected by the temperature detecting element 4 through the pot 5. Here, when the bottom of the pot 5 is warped as shown in FIG. 1, the followability of the temperature detecting element 4 to an increase in the oil temperature differs depending on the degree of the warpage. That is, even if the oil temperature increases, the larger the warp of the pot 5, the slower the rise of the detection value of the temperature detection element 4. However, if the temperature of the oil exceeds the ignition temperature while the rise in the oil temperature is left, a fire may occur. Therefore, the first abnormal heating prevention means 8 determines a power-down temperature T for preventing abnormal heating from the gradient obtained from the temperature of the temperature detecting element 4 and the time obtained by the time measuring means 6, and determines the temperature of the temperature detecting element 4. Is T
Then, a power down command is sent to the control means 7. That is, it operates as an electromagnetic cooker having a function of preventing abnormal heating of oil in a pot with a sled at the bottom.
【００１５】次に、本実施例の第一の異常加熱防止手段
８の動作に付いて図２、図３に基づいて説明する。図２
は鍋に油を入れて加熱したときの温度検出素子４で検出
される温度の時間変化を模式的に示した図であり、底の
そっていない鍋、そりの小さい鍋、そりの大きい鍋の３
通りの例を示している。底がそっている場合、そりの程
度に応じて油温の上昇に対する温度検出素子４の追随性
が異なる。つまり、油温が上がっていても、鍋のそりが
大きいほど温度検出素子４の検出値の上昇が遅くなる。
本実施例の第一の異常加熱防止手段８は、温度検出素子
４による温度と計時手段６による時間より求めた傾きを
入力とし、異常加熱を防止するためのパワーダウン温度
Ｔを出力するファジィ推論によりパワーダウン温度Ｔを
決定する。傾きとして、本実施例では温度検出素子４に
よる温度がＴ1になったときからＴ2になるまでにかかっ
た時間ｔを用いた。図２のｔ1、ｔ2、ｔ3がｔの測定例
である。Ｔ1とＴ2は例えば５０度と６０度といった比較
的低い温度である。これは、そりのある鍋では油温は温
度検出素子４による温度よりはるかに高くなるのを考慮
しているためである。推論ルールは「ｔが長ければ、Ｔ
を低くする」「ｔが普通であれば、Ｔを普通にする」
「ｔが短ければ、Ｔを高くする」という３個のルールか
らなる。また、入力ｔに下限値ｔ0を設けており、ｔが
ｔ0より小さい場合、そりの無い鍋と見なして制御を行
わない。ｔが「長い」とか、Ｔを「高く」といった定性
的な概念は図３に示すメンバーシップ関数により定量的
に表現される。Next, the operation of the first abnormal heating prevention means 8 of the present embodiment will be described with reference to FIGS. FIG.
FIG. 4 is a diagram schematically showing a time change of a temperature detected by the temperature detection element 4 when oil is put into a pan and heated, and shows a pan without a bottom, a small-sleved pot, and a large-sled pot. 3
An example is shown. When the bottom is warped, the followability of the temperature detecting element 4 to an increase in the oil temperature differs depending on the degree of the warpage. In other words, even if the oil temperature is raised, the rise in the detected value of the temperature detecting element 4 becomes slower as the sled of the pot is larger.
The first abnormal heating prevention means 8 of the present embodiment receives the slope obtained from the temperature detected by the temperature detecting element 4 and the time measured by the time measuring means 6 and outputs a power-down temperature T for preventing abnormal heating. To determine the power down temperature T. In the present embodiment, as the slope, the time t from when the temperature of the temperature detecting element 4 reaches T1 to when it reaches T2 is used. T1, t2, and t3 in FIG. 2 are measurement examples of t. T1 and T2 are relatively low temperatures, for example, 50 and 60 degrees. This is because the oil temperature in a pot with a sled is much higher than the temperature detected by the temperature detecting element 4. The inference rule is that if t is long, T
"If t is normal, make T normal"
It consists of three rules: "If t is short, increase T". Also, a lower limit value t0 is provided for the input t. If t is smaller than t0, the control is not performed assuming that the pot is a sled-free pot. A qualitative concept such as t being “long” or T being “high” is quantitatively expressed by the membership function shown in FIG.
【００１６】このように本実施例によると、底にそりの
ある鍋の油の異常加熱を鍋のそりを考慮して防止する機
能を備えた電磁調理器を提供することができる。As described above, according to the present embodiment, it is possible to provide an electromagnetic cooker having a function of preventing abnormal heating of oil in a pot having a sled at the bottom in consideration of the sled of the pot.
【００１７】なお、異常加熱防止手段８としてファジィ
推論を用いる例を示したが、ニューラルネットワーク
や、温度検出素子４の温度の傾きの関数で表す方法も考
えられる。Although an example in which fuzzy inference is used as the abnormal heating prevention means 8 has been described, a method of expressing the temperature using a neural network or a function of the temperature gradient of the temperature detecting element 4 is also conceivable.
【００１８】本発明の第二の手段の実施例を図４から図
７を基に説明する。先ず図４に基づいて本実施例の全体
構成について説明する。本体１は第二の異常加熱防止手
段９を備えている。第二の異常加熱防止手段９は温度検
出素子４による温度と計時手段６による時間より求めた
傾きｔと傾きの時間変化ｄｔから、異常加熱を防止する
ためのパワーダウン温度Ｔを決定し、温度検出素子４の
温度がＴになると制御手段７にパワーダウン命令を送
る。第二の異常加熱防止手段９は、本実施例ではマイク
ロコンピュータで構成している。その他、第一の手段の
実施例と同じ機能を持つものは同じ番号を用いた。An embodiment of the second means of the present invention will be described with reference to FIGS. First, the overall configuration of the present embodiment will be described with reference to FIG. The main body 1 has a second abnormal heating prevention means 9. The second abnormal heating prevention means 9 determines a power-down temperature T for preventing abnormal heating from the slope t and the time change dt of the slope obtained from the temperature by the temperature detecting element 4 and the time by the timer means 6, When the temperature of the detecting element 4 becomes T, a power down command is sent to the control means 7. The second abnormal heating prevention means 9 is constituted by a microcomputer in this embodiment. In addition, the same numbers are used for those having the same functions as in the embodiment of the first means.
【００１９】以下、本実施例の動作を説明する。使用者
は、被調理物を鍋５に入れ、プレート２の上にセットす
る。次に、使用者が図示されていないスイッチを入れ、
調理を開始すると制御手段７は加熱コイル３をフルパワ
ーで動作させる。加熱コイル３により作られる磁界によ
り鍋５に渦電流が起こり、鍋５の中の被調理物が加熱さ
れる。被調理物の温度上昇は鍋５を通じて温度検出素子
４で検出される。ここで、底がそっている鍋で油を加熱
する場合、そりの程度に応じて油温の上昇に対する温度
検出素子４の追随性が異なる。つまり、油温が上がって
いても、鍋５のそりが大きいほど温度検出素子４の検出
値の上昇が遅くなる。また、同様に鍋５に水をいれて加
熱した場合、鍋のそりが大きいほど温度検出素子４の検
出値の上昇が遅くなる。つまり、鍋が限定されない限
り、温度検出素子４による温度と計時手段６による時間
より求めた傾きｔだけからは被調理物が油であるか、水
であるかを判定することはできない。しかし、被調理物
を油に限定しない場合、油と水を何らかの方法で区別で
きなければ、油の異常加熱を防止するプロセスが水の加
熱の際にも影響を及ぼし、水が沸騰する前にパワーダウ
ンが起こる等の弊害が出る。そこで、第二の異常加熱防
止手段９は温度検出素子４による温度と計時手段６によ
る時間より求めた傾きｔと傾きの時間変化ｄｔとから、
異常加熱を防止するためのパワーダウン温度Ｔを決定
し、温度検出素子４の温度がＴになると制御手段７にパ
ワーダウン命令を送る。つまり、底にそりのある鍋の油
の異常加熱を防止し、水の加熱を妨げない機能を備えた
電磁調理器として動作する。The operation of this embodiment will be described below. The user puts the food in the pot 5 and sets it on the plate 2. Next, the user turns on a switch (not shown),
When cooking is started, the control means 7 operates the heating coil 3 at full power. An eddy current is generated in the pan 5 by the magnetic field generated by the heating coil 3, and the food in the pan 5 is heated. The temperature rise of the object to be cooked is detected by the temperature detecting element 4 through the pot 5. Here, when the oil is heated in a pan with a bottom, the followability of the temperature detecting element 4 to an increase in the oil temperature differs depending on the degree of the warp. That is, even if the oil temperature increases, the larger the warp of the pot 5, the slower the rise of the detection value of the temperature detection element 4. Similarly, when water is added to the pot 5 and heated, the larger the sled of the pot, the slower the rise in the detection value of the temperature detecting element 4. That is, as long as the pan is not limited, it is impossible to determine whether the object to be cooked is oil or water from only the temperature detected by the temperature detection element 4 and the slope t obtained from the time measured by the timer 6. However, if the food is not limited to oil and the oil and water cannot be distinguished in any way, the process of preventing abnormal heating of the oil will also affect the heating of the water, before the water boils. Evils such as power down occur. Therefore, the second abnormal heating prevention means 9 calculates the slope t obtained from the temperature of the temperature detecting element 4 and the time measured by the timer 6 and the time change dt of the slope.
A power-down temperature T for preventing abnormal heating is determined, and when the temperature of the temperature detecting element 4 reaches T, a power-down command is sent to the control means 7. That is, it operates as an electromagnetic cooker having a function of preventing abnormal heating of oil in a pot with a sled at the bottom and not hindering heating of water.
【００２０】次に、本実施例の第二の異常加熱防止手段
９の動作に付いて図５から図７に基づいて説明する。図
５は鍋に被調理物を入れて加熱したときの温度検出素子
４で検出される温度の時間変化を模式的に示した図であ
り、底のそりの小さい鍋で水を加熱したとき、そりの大
きい鍋で油を加熱したときの２通りの例を示している。
本実施例の第二の異常加熱防止手段９は、温度検出素子
４による温度と計時手段６による時間より求めた傾きｔ
と傾きの時間変化ｄｔとを入力とし、異常加熱を防止す
るためのパワーダウン温度Ｔを出力するファジィ推論に
よりパワーダウン温度Ｔを決定する。傾きｔとして、本
実施例では温度検出素子４による温度がＴ1になったと
きからＴ2になるまでにかかった時間ｔを用いた。Ｔ1と
Ｔ2は例えば５０度と６０度といった比較的低い温度で
ある。これは、そりのある鍋では油温は温度検出素子４
による温度よりはるかに高くなるのを考慮しているため
である。また、傾きの時間変化ｄｔとして、本実施例で
は温度検出素子４による温度がＴ3からＴ4になるまでに
かかった時間と、Ｔ5からＴ6になるまでにかかった時間
との差を用いた。図５のｄｔ1、ｄｔ2がその測定例であ
る。ｄｔ1は底のそりの小さい鍋で水を加熱したときに
温度検出素子４による温度がＴ3からＴ4になるまでにか
かった時間ｔｍ1と、Ｔ5からＴ6になるまでにかかった
時間ｔｍ2との差、ｔｍ2−ｔｍ1である。ｄｔ2はそりの
大きい鍋で油を加熱したときに温度検出素子４による温
度がＴ3からＴ4になるまでにかかった時間ｔｍ3と、Ｔ5
からＴ6になるまでにかかった時間ｔｍ4との差、ｔｍ4
−ｔｍ3である。水と油を比較すると、水の方がｄｔが
大きくなる。Ｔ3、Ｔ4、Ｔ5、Ｔ6は例えば５０度、５５
度、５５度、６０度といった温度である。推論ルールは
「ｔが長く、かつ、ｄｔが小さければ、Ｔを低くする」
「ｔが短く、かつ、ｄｔが大きければ、Ｔをとても高く
する」というような、図６に示す６個のルールからな
る。また、入力ｔに下限値ｔ0を設けており、ｔがｔ0よ
り小さい場合、そりの無い鍋と見なして制御を行わな
い。ｔが「長い」とか、Ｔを「とても高く」といった定
性的な概念は図７に示すメンバーシップ関数により定量
的に表現される。Next, the operation of the second abnormal heating prevention means 9 of this embodiment will be described with reference to FIGS. FIG. 5 is a diagram schematically showing a time change of the temperature detected by the temperature detecting element 4 when the object to be cooked is put in the pan and heated, and when the water is heated by the small pot with the bottom sled, 2 shows two examples of heating oil in a pot with a large sled.
The second abnormal heating prevention means 9 of the present embodiment has a slope t obtained from the temperature of the temperature detecting element 4 and the time of the timer 6.
The power down temperature T is determined by fuzzy inference that receives the input and the time change dt of the slope and outputs a power down temperature T for preventing abnormal heating. In the present embodiment, the time t from when the temperature of the temperature detecting element 4 reaches T1 to when the temperature by the temperature detecting element 4 reaches T2 is used as the slope t. T1 and T2 are relatively low temperatures, for example, 50 and 60 degrees. This is because in a pot with a sled, the oil temperature is
The reason is that the temperature is considered to be much higher. In this embodiment, the difference between the time required for the temperature of the temperature detecting element 4 to change from T3 to T4 and the time required for the temperature to change from T5 to T6 is used as the time change dt of the slope. Dt1 and dt2 in FIG. 5 are measurement examples. dt1 is the difference between the time tm1 required for the temperature by the temperature detecting element 4 to change from T3 to T4 when the water is heated in a pot with a small sled bottom and the time tm2 required for the temperature to change from T5 to T6, tm2-tm1. dt2 is the time tm3 required for the temperature of the temperature detecting element 4 to change from T3 to T4 when the oil is heated in a pan with a large sled, and T5.
Difference from time tm4 required to reach T6, tm4
−tm3. Compared with water and oil, water has a larger dt. T3, T4, T5, T6 are, for example, 50 degrees, 55
Degrees, 55 degrees, and 60 degrees. The inference rule is "if t is long and dt is small , lower T"
FIG. 6 shows six rules such as “ If t is short and dt is large , T is very high”. Also, a lower limit value t0 is provided for the input t. If t is smaller than t0, the control is not performed assuming that the pot is a sled-free pot. A qualitative concept such as t being “long” or T being “very high” is quantitatively expressed by a membership function shown in FIG.
【００２１】このように本実施例によると、底にそりの
ある鍋の油の異常加熱を防止し、水の加熱を妨げない機
能を備えた電磁調理器を提供することができる。As described above, according to this embodiment, it is possible to provide an electromagnetic cooker having a function of preventing abnormal heating of oil in a pot having a sled at the bottom and not obstructing heating of water.
【００２２】なお、異常加熱防止手段としてファジィ推
論を用いる例を示したが、ニューラルネットワークや、
温度検出素子の温度の傾きと傾きの時間変化の関数で表
す方法も考えられる。Although an example of using fuzzy inference as an abnormal heating prevention means has been described, a neural network,
A method is also conceivable in which the temperature is represented by a function of the temperature gradient of the temperature detecting element and the time change of the gradient.
【００２３】本発明の第三の手段の実施例を図８を基に
説明する。先ず図８に基づいて本実施例の全体構成につ
いて説明する。本体１は第三の異常加熱防止手段１０を
備えている。１１は底にそりのない鍋である。第三の異
常加熱防止手段１０は温度検出素子４による温度と計時
手段６による時間より求めた傾きｔから、異常加熱を防
止するためのパワーダウン温度Ｔを決定し、温度検出素
子４の温度がＴになると制御手段７にパワーダウン命令
を送る。第三の異常加熱防止手段１０は、本実施例では
マイクロコンピュータで構成している。その他、第一の
手段の実施例と同じ機能を持つものは同じ番号を用い
た。An embodiment of the third means of the present invention will be described with reference to FIG. First, the overall configuration of the present embodiment will be described with reference to FIG. The main body 1 has a third abnormal heating prevention means 10. 11 is a pot with no sled at the bottom. The third abnormal heating prevention means 10 determines a power-down temperature T for preventing abnormal heating from the temperature detected by the temperature detecting element 4 and the slope t obtained from the time measured by the time measuring means 6, and the temperature of the temperature detecting element 4 is reduced. At T, a power down command is sent to the control means 7. The third abnormal heating prevention means 10 is constituted by a microcomputer in this embodiment. In addition, the same numbers are used for those having the same functions as in the embodiment of the first means.
【００２４】以下、本実施例の動作を説明する。使用者
は、油を鍋１１に入れ、プレート２の上にセットする。
次に、使用者が図示されていないスイッチを入れ、調理
を開始すると制御手段７は加熱コイル３をフルパワーで
動作させる。加熱コイル３により作られる磁界により鍋
１１に渦電流が起こり鍋５のなかの油が加熱される。油
の温度上昇は鍋５を通じて温度検出素子４で検出され
る。ここで、鍋の底がそっていない場合、油量に応じて
油温の上昇度合いが異なる。第三の異常加熱防止手段１
０は温度検出素子４による温度と計時手段６による時間
より求めた傾きから、異常加熱を防止するためのパワー
ダウン温度Ｔを決定し、温度検出素子４の温度がＴにな
ると制御手段７にパワーダウン命令を送る。つまり、底
にそりの無い鍋の油の異常加熱を防止する機能を備えた
電磁調理器として動作する。The operation of this embodiment will be described below. The user puts the oil in the pan 11 and sets it on the plate 2.
Next, when the user turns on a switch (not shown) and starts cooking, the control means 7 operates the heating coil 3 at full power. An eddy current is generated in the pan 11 by the magnetic field generated by the heating coil 3, and the oil in the pan 5 is heated. The temperature rise of the oil is detected by the temperature detecting element 4 through the pot 5. Here, when the bottom of the pot is not flat, the degree of increase in the oil temperature varies depending on the amount of oil. Third abnormal heating prevention means 1
0 determines the power-down temperature T for preventing abnormal heating from the slope obtained from the temperature by the temperature detecting element 4 and the time from the time measuring means 6, and when the temperature of the temperature detecting element 4 becomes T, the control means 7 supplies power. Send down order. In other words, it operates as an electromagnetic cooker having a function of preventing abnormal heating of oil in a pot without a sled at the bottom.
【００２５】次に、本実施例の第三の異常加熱防止手段
１０の動作に付いて説明する。図９は鍋に油を入れて加
熱したときの温度検出素子４で検出される温度の時間変
化を模式的に示した図であり、底のそっていない鍋で少
量の油を加熱した場合と、多量の油を加熱した場合の２
通りの例を示している。底がそっていない場合、少量の
油を加熱する場合は油温の上昇に対する温度検出素子４
の追随性は良いが、油量が多い場合油温よりも温度検出
素子４の検出温度の方が先に上昇する。つまり、油量が
多いと温度検出素子４の検出値が上昇していても、油温
はまだ上昇していない。本実施例の第三の異常加熱防止
手段１０は、温度検出素子４による温度と計時手段６に
よる時間より求めた傾きを入力とし、異常加熱を防止す
るためのパワーダウン温度Ｔを出力する一次関数により
パワーダウン温度Ｔを決定する。傾きとして、本実施例
では温度検出素子４による温度がＴ7になったときから
Ｔ8になるまでにかかった時間ｔを用いた。図９のｔ4、
ｔ5がｔの測定例である。Ｔ7とＴ8は例えば１３０度と
１５０度といった比較的高い温度である。これは、そり
の無い鍋では油温が温度検出素子４による温度より高く
なることはなく、温度検出素子４の温度が比較的高温に
なるまで加熱しても問題がないこと、また、温度検出素
子４の温度が比較的高温になる領域まで加熱しなければ
油量は温度検出素子４の温度変化に影響しないことを考
慮したものである。ｔからＴを求める一次関数は、以下
の式で表される。Next, the operation of the third abnormal heating preventing means 10 of the present embodiment will be described. FIG. 9 is a diagram schematically showing a time change of the temperature detected by the temperature detecting element 4 when the oil is put in the pan and heated, and shows a case where a small amount of oil is heated in the pan without the bottom. , When a large amount of oil is heated
An example is shown. If the bottom is not flat, and if a small amount of oil is to be heated, the temperature detection element 4 for rising oil temperature
Is good, but when the amount of oil is large, the temperature detected by the temperature detecting element 4 rises earlier than the oil temperature. That is, when the oil amount is large, the oil temperature has not yet increased even if the detection value of the temperature detection element 4 has increased. The third abnormal heating prevention means 10 of the present embodiment is a linear function which receives the temperature obtained by the temperature detecting element 4 and the slope obtained from the time measured by the time measuring means 6 and outputs a power-down temperature T for preventing abnormal heating. To determine the power down temperature T. In the present embodiment, as the slope, the time t required from when the temperature of the temperature detection element 4 reaches T7 to when the temperature reaches T8 is used. T4 in FIG. 9,
t5 is a measurement example of t. T7 and T8 are relatively high temperatures, for example, 130 degrees and 150 degrees. This is because, in a pot without sled, the oil temperature does not become higher than the temperature detected by the temperature detecting element 4, and there is no problem even if the temperature of the temperature detecting element 4 becomes relatively high. The reason is that the oil amount does not affect the temperature change of the temperature detecting element 4 unless the element 4 is heated to a region where the temperature of the element 4 becomes relatively high. A linear function for obtaining T from t is represented by the following equation.
【００２６】Ｔ＝ａｔ＋ｂ （ａ，ｂは定数） このように本実施例によると、底にそりの無い鍋の油の
異常加熱を防止する機能を備えた電磁調理器を提供する
ことができる。T = at + b (a and b are constants) As described above, according to the present embodiment, it is possible to provide an electromagnetic cooker having a function of preventing abnormal heating of oil in a pot having no warped bottom.
【００２７】なお、異常加熱防止手段として温度検出素
子の温度の傾きの関数で表す例を示したが、ニューラル
ネットワークやファジィ推論を用いる方法も考えられ
る。Although an example in which the abnormal heating prevention means is represented by a function of the temperature gradient of the temperature detecting element has been described, a method using a neural network or fuzzy inference is also conceivable.
【００２８】[0028]
【発明の効果】以上説明したように本発明の第一の手段
は、温度検出素子の検出値の傾きから底にそりのある鍋
の油の異常加熱を防止する第一の異常加熱防止手段を備
えたもので、底にそりのある鍋の油の異常加熱を防止す
る機能を備えた電磁調理器を実現することができる。As described above, the first means of the present invention is the first means for preventing abnormal heating of oil in a pot having a sled at the bottom from the inclination of the detected value of the temperature detecting element. Thus, an electromagnetic cooker having a function of preventing abnormal heating of oil in a pot with a sled at the bottom can be realized.
【００２９】また、本発明の第二の手段は、温度検出素
子の検出値の傾きと傾きの時間変化から底にそりのある
鍋の油の異常加熱を防止し、かつ、水の加熱を妨げない
第二の異常加熱防止手段を備えたもので、底にそりのあ
る鍋の油の異常加熱を防止し、かつ、水の加熱を妨げな
い機能を備えた電磁調理器を実現することができる。Further, the second means of the present invention is to prevent abnormal heating of oil in a pot with a sled at the bottom and prevent heating of water from the inclination of the detected value of the temperature detecting element and the time change of the inclination. With the second abnormal heating prevention means, it is possible to realize an electromagnetic cooker having a function of preventing abnormal heating of oil in a pot with a sled at the bottom and not obstructing heating of water. .
【００３０】さらに、本発明の第三の手段は、温度検出
素子の検出値の傾きから底にそりのない鍋の油の異常加
熱を防止する第三の異常加熱防止手段を備えたもので、
底にそりのない鍋の油の異常加熱を防止する機能を備え
た電磁調理器を実現することができる。Further, the third means of the present invention is provided with a third abnormal heating preventing means for preventing abnormal heating of the oil in the pot without warping to the bottom from the inclination of the detected value of the temperature detecting element,
It is possible to realize an electromagnetic cooker having a function of preventing abnormal heating of oil in a pot without a warped bottom.
【図１】本発明の第一の手段の実施例の電磁調理器の模
式的断面図FIG. 1 is a schematic sectional view of an electromagnetic cooker according to an embodiment of the first means of the present invention.
【図２】同電磁調理器の温度特性図FIG. 2 is a temperature characteristic diagram of the electromagnetic cooker.
【図３】同電磁調理器の第一の異常加熱防止手段の一例
であるファジィ推論のメンバーシップ関数を示す図FIG. 3 is a diagram showing a membership function of fuzzy inference which is an example of a first abnormal heating prevention means of the electromagnetic cooker.
【図４】本発明の第二の手段の実施例の電磁調理器の模
式的断面図FIG. 4 is a schematic sectional view of an electromagnetic cooker according to an embodiment of the second means of the present invention.
【図５】同電磁調理器の温度特性図FIG. 5 is a temperature characteristic diagram of the electromagnetic cooker.
【図６】同電磁調理器の第二の異常加熱防止手段の一例
であるファジィ推論のルールを示す図FIG. 6 is a diagram showing a rule of fuzzy inference which is an example of a second abnormal heating prevention means of the electromagnetic cooker.
【図７】同ファジィ推論のメンバーシップ関数を示す図FIG. 7 is a diagram showing a membership function of the fuzzy inference.
【図８】本発明の第三の手段の実施例の電磁調理器の模
式的断面図FIG. 8 is a schematic sectional view of an electromagnetic cooker according to a third embodiment of the present invention.
【図９】同電磁調理器の温度特性図FIG. 9 is a temperature characteristic diagram of the electromagnetic cooker.
１ 本体 ２ プレート ３ 加熱コイル ４ 温度検出素子 ６ 計時手段 ７ 制御手段 ８ 第一の異常加熱防止手段 ９ 第二の異常加熱防止手段 １０ 第三の異常加熱防止手段 DESCRIPTION OF SYMBOLS 1 Main body 2 Plate 3 Heating coil 4 Temperature detection element 6 Clocking means 7 Control means 8 First abnormal heating prevention means 9 Second abnormal heating prevention means 10 Third abnormal heating prevention means
───────────────────────────────────────────────────── フロントページの続き (72)発明者 近藤 信二 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (72)発明者 貞平 匡史 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (72)発明者 片岡 章 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (56)参考文献 特開 平１−211893（ＪＰ，Ａ) 特開 平１−105492（ＪＰ，Ａ) 特開 平１−319289（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H05B 6/12 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Shinji Kondo 1006 Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Akira Kataoka 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. JP-A-1-319289 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) H05B 6/12
Claims (3)
る制御手段と、鍋を載せるプレートと、鍋の温度を検出
し制御手段に信号を送る温度検出素子と、時間を計測し
制御手段に信号を送る計時手段と、温度検出素子の検出
値の傾きから底にそりのある鍋の油の異常加熱を防止す
る信号を制御手段に送る第一の異常加熱防止手段とを備
え、前記第一の異常加熱防止手段は、温度検出素子によ
る温度と計時手段による時間より温度上昇の傾きｔを求
め、この温度上昇の傾きに応じて異常加熱を防止するた
めのパワーダウン温度Ｔを決定し、温度検出素子の温度
がＴになると前記加熱コイルからの加熱量を低減させる
ことを特徴とし、前記温度上昇の傾きは、鍋内の油の量
が前記温度検出素子の温度変化に影響しない温度領域で
検出し、温度上昇の傾きｔがゆるやかであるほどＴを低
くする電磁調理器。1. A heating coil, control means for controlling the heating coil, a plate on which the pan is placed, a temperature detecting element for detecting the temperature of the pan and sending a signal to the control means, and measuring time and sending a signal to the control means. Bei time counting means for sending, and a first abnormality heating prevention means for sending a signal to prevent abnormal heating of the oil pan with a warp on the bottom from the slope of the detection value of the temperature detecting element to the control means
The first abnormal heating prevention means is provided by a temperature detecting element.
The temperature rise slope t from the temperature
To prevent abnormal heating according to the slope of this temperature rise.
The power-down temperature T to determine the temperature of the temperature detection element.
When T becomes T, the amount of heating from the heating coil is reduced.
Characterized in that the slope of the temperature rise is the amount of oil in the pot
Is in a temperature range that does not affect the temperature change of the temperature detecting element.
Detected, and the lower the slope t of the temperature rise, the lower T
Induction electromagnetic cooker.
二の異常加熱防止手段は温度上昇の傾きｔの時間変化ｄ
ｔを求め、ｔを求めた後のｄｔが小さいほどＴを低くす
る請求項１記載の電磁調理器。2. The method according to claim 1 , further comprising a second abnormal heating preventing means ,
The second means for preventing abnormal heating is a time change d of the slope t of the temperature rise.
t is determined, and T is reduced as dt after t is determined is smaller.
The electromagnetic cooker according to claim 1 .
異常加熱防止手段は、鍋内の油の量が前記温度検出素子
の温度変化に影響を与える温度領域で温度上昇の傾きｔ
を求め、このｔが長いほどＴを高くする請求項１または
２に記載の電磁調理器。電磁調理器。A third abnormal heating preventing means ;
Means for preventing abnormal heating, the amount of oil in the pan is the temperature detection element
Temperature rise slope t in the temperature range that affects the temperature change
Claim 1 or Claim 2 wherein T is increased as t is longer.
3. The electromagnetic cooker according to 2 . Electromagnetic cooker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23910792A JP3070289B2 (en) | 1992-09-08 | 1992-09-08 | Electromagnetic cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23910792A JP3070289B2 (en) | 1992-09-08 | 1992-09-08 | Electromagnetic cooker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0689780A JPH0689780A (en) | 1994-03-29 |
| JP3070289B2 true JP3070289B2 (en) | 2000-07-31 |
Family
ID=17039911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23910792A Expired - Fee Related JP3070289B2 (en) | 1992-09-08 | 1992-09-08 | Electromagnetic cooker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3070289B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101838521B1 (en) * | 2017-08-03 | 2018-03-14 | 유한책임회사 샤워트리 | Roof-top tent for vehicles using sunroof |
-
1992
- 1992-09-08 JP JP23910792A patent/JP3070289B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101838521B1 (en) * | 2017-08-03 | 2018-03-14 | 유한책임회사 샤워트리 | Roof-top tent for vehicles using sunroof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0689780A (en) | 1994-03-29 |
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