JPH01105492A - Boiling detecting device - Google Patents
Boiling detecting deviceInfo
- Publication number
- JPH01105492A JPH01105492A JP26209487A JP26209487A JPH01105492A JP H01105492 A JPH01105492 A JP H01105492A JP 26209487 A JP26209487 A JP 26209487A JP 26209487 A JP26209487 A JP 26209487A JP H01105492 A JPH01105492 A JP H01105492A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- gradient
- boiling
- detection device
- 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.)
- Granted
Links
- 238000009835 boiling Methods 0.000 title claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 101100298225 Caenorhabditis elegans pot-2 gene Proteins 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、加熱調理器における沸騰検出装置に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a boiling detection device for a heating cooker.
２１１−ノ
従来の技術
従来の沸騰検出装置は、サーモスタット等により、被加
熱物である鍋等の底部の温度を間接的に検知し、その温
度がある温度（沸騰温度に相関する鍋底温度）以上にな
ると出力していた。211-NO PRIOR TECHNOLOGY Conventional boiling detection devices indirectly detect the temperature of the bottom of the object to be heated, such as a pot, using a thermostat or the like, and detect whether the temperature is higher than a certain temperature (bottom temperature correlated with boiling temperature). It was outputting when
発明が解決しようとする問題点
しかし、この様なものでは、鍋の反シで鍋底の温度検出
に大きな誤差を生じ、精度の高い沸騰検知を行うことが
できなかった。Problems to be Solved by the Invention However, with such a device, a large error occurs in detecting the temperature at the bottom of the pot due to the temperature of the pot, making it impossible to detect boiling with high accuracy.
すなわち、水の量が少なくても鍋の反りが大きくなると
、サーモスタットが検知する温度は、実際の水の温度よ
りかなり遅れるとともに絶対温度も低い値を示し誤差が
大きくなるものである。That is, even if the amount of water is small, if the warp of the pot becomes large, the temperature detected by the thermostat will lag considerably behind the actual water temperature, and the absolute temperature will also be a low value, resulting in a large error.
そこで、本発明は、鍋の反りが変化しても大きな誤差な
く、沸騰の検知をすることを目的とする。Therefore, an object of the present invention is to detect boiling without a large error even if the warp of the pot changes.
問題点を解決するだめの手段
そして上記問題点を解決する本発明の技術的な手段は、
被加熱物を加熱する加熱手段と、被加熱物である鍋等の
水温を間接的に検知する温度検出装置とこの温度検出装
置の出力の勾配を検出する３へ一７′
勾配検出装置と、加熱手段を動作してからの経過時間を
計測する計時装置と、一定の温度、一定の温度勾配およ
び一定の時間を記憶している記憶装置と、この記憶装置
の記憶値と前記温度検出装置、温度勾配検出装置および
計時装置の出力とを比較し、温度検出装置あるいは計時
装置の出力が記憶値より大きくなった時点あるいは温度
勾配検出装置の出力が記憶値より小さくなった時点で出
力する演算装置とよりなる構成である。Means for solving the problems and technical means of the present invention for solving the above problems are as follows:
A heating means for heating an object to be heated, a temperature detection device for indirectly detecting the water temperature of the object to be heated, such as a pot, and a gradient detection device for detecting the gradient of the output of this temperature detection device; a timing device that measures the elapsed time after the heating means is operated; a storage device that stores a constant temperature, a constant temperature gradient, and a constant time; a stored value of the storage device; and the temperature detection device; An arithmetic device that compares the outputs of a temperature gradient detection device and a timing device and outputs an output when the output of the temperature detection device or timing device becomes larger than the stored value or when the output of the temperature gradient detection device becomes smaller than the stored value. The structure consists of the following.
作用 この技術的手段による作用は次のようになる。action The effect of this technical means is as follows.
すなわち、温度検出装置にて間接的に鍋等水の温度を検
知し、また勾配検出装置にて温度上昇勾配を検知し、さ
らに、計時装置にて加熱開始してからの経過時間を計測
し、温度値あるいは、経過時間のどれかが所定の値より
大きく、あるいは温度勾配が所定の値より小さくなった
時に、水が沸騰したと判断する。That is, a temperature detection device indirectly detects the temperature of water such as a pot, a gradient detection device detects the temperature rise gradient, and a timing device measures the elapsed time after heating starts. It is determined that the water has boiled when either the temperature value or the elapsed time is larger than a predetermined value, or when the temperature gradient becomes smaller than a predetermined value.
実施例
本発明の一実施例の加熱調理器の構成を第２図により説
明する。すなわち、１は被加熱物である鍋２等を載置す
るためのトッププレートで、本体３と接着等で取付けら
れている。本体３内には、高周波の磁力線を発生するコ
イル４と、これらを制御する制御回路５が内蔵され、さ
らには、内部よりトッププレート１に圧接するように感
温素子６が取付けられている。Embodiment The structure of a heating cooker according to an embodiment of the present invention will be explained with reference to FIG. That is, numeral 1 denotes a top plate on which the object to be heated, such as a pot 2, is placed, and is attached to the main body 3 by adhesive or the like. Inside the main body 3, a coil 4 that generates high-frequency magnetic lines of force and a control circuit 5 that controls these are built-in, and furthermore, a temperature sensing element 6 is attached so as to be in pressure contact with the top plate 1 from inside.
次に、本発明の回路構成の一例を第１図により説明する
。すなわち、７は交流電波で、整流器８により直流に変
換される。トランジスタ９は直流電源に対して直列に接
続されて、コイル４への電流を入切する。コイル４に並
列に接続されているコンデンサー１０は、トランジスタ
９を入切することにより、コイル４との間で自励発振し
高周波の電流が流れ、コイル４より高周波の磁力線が発
生する。サーミスタ等の感温素子６からの信号は、ム／
Ｄ変換器１１でデジタル信号に変換され、マイクロコン
ピュータ−（以下マイコンと記載）１２に送られる。よ
って感温素子６およびム／Ｄ変換器１１により温度検出
装置を構成している。また、６ ページ
マイコン１２は温度検出装置の信号から温度勾配を検出
する勾配検出手段、加熱時間を計時する計時手段、一定
の温度勾配、一定の計時時間、−定の温度を記憶した記
憶手段および演算手段からなっておシ、演算手段の出力
によりトランジスタ９への信号を制御し、コイル４への
通電を入切する。Next, an example of the circuit configuration of the present invention will be explained with reference to FIG. That is, 7 is an alternating current radio wave, which is converted into direct current by a rectifier 8. Transistor 9 is connected in series with the DC power supply to turn on/off current to coil 4 . By turning on and off the transistor 9, the capacitor 10 connected in parallel to the coil 4 self-oscillates with the coil 4, causing a high-frequency current to flow, and the coil 4 generates high-frequency magnetic lines of force. The signal from the temperature sensing element 6 such as a thermistor is
It is converted into a digital signal by a D converter 11 and sent to a microcomputer (hereinafter referred to as microcomputer) 12. Therefore, the temperature sensing element 6 and the Mu/D converter 11 constitute a temperature detection device. The 6-page microcomputer 12 also includes a gradient detecting means for detecting a temperature gradient from a signal from a temperature detecting device, a clocking means for measuring a heating time, a storage means for storing a constant temperature gradient, a constant measuring time, and a constant temperature. It is composed of arithmetic means, and the output of the arithmetic means controls the signal to the transistor 9 to turn on/off the energization of the coil 4.
第３図に鍋や鍋に入れる水の条件によって、経過時間と
、感温素子６が検知する温度との関係を示す。鍋に入れ
る水の量が少ない場合は、カーブム１１３に示すように
短時間に温度が上昇する。FIG. 3 shows the relationship between the elapsed time and the temperature detected by the temperature sensing element 6, depending on the conditions of the pot and the water put in the pot. When the amount of water put into the pot is small, the temperature rises in a short time as shown in curve 113.
また、水の量が多い場合は、カーブム２１４に示すよう
にカーブの傾きが小さくなり、温度が上がるまで時間が
かかる。また鍋の底面に反シがある場合は、反りが大き
いほど、トッププレート１との間に空気層ができて、伝
導を悪くするため、同じ水の量であっても温度の上昇カ
ーブの傾きが小さくなっていく。カーブＢ１１５は、カ
ープム１１３の水量で反りが大きい場合、カーブＢ２１
６は、カープム２１４の水量で反りが大きい場合を示し
ている。すなわち、温度だけで沸騰を判断し６、、−。Moreover, when the amount of water is large, the slope of the curve becomes small as shown in the curve 214, and it takes time for the temperature to rise. Also, if there is a warp on the bottom of the pot, the greater the warp, the more air space will be formed between it and the top plate 1, which will worsen conduction, so even if the amount of water is the same, the slope of the temperature rise curve will be is getting smaller. Curve B115 is curve B21 when the amount of water in Carpum 113 causes large warpage.
6 shows a case where the amount of water in the carpum 214 causes large warpage. In other words, boiling can be determined only by temperature6.
ようとすると、反シが大きい場合は、かなシ大きな誤差
を生じることがある。水が少ない場合の沸騰点を温度Ｔ
１．経過時間ｔ１とし、温度Ｔだけで沸騰を検知すると
反シが大きい場合（が−プＢ１１６ ）では、経過時間
ｔがｔｌよりかなりオーバーしてから検知ということに
なり、大きな誤差を生じさせる。また、温度カーブだけ
で沸騰を検知しても同様に大きな誤差を生じる。If you try to do this, if the anti-sha is large, a large error may occur. The boiling point when there is little water is the temperature T
1. If the elapsed time is t1 and boiling is detected based only on the temperature T, if the reaction is large (gap B116), the detection will be performed after the elapsed time t has considerably exceeded tl, causing a large error. Furthermore, detecting boiling using only the temperature curve also causes a large error.
さらに、水の量が多くなった場合は、カーブム２１４の
ように温度勾配がかなシ小さくなり、沸騰の温度はＴ２
＋沸騰までの経過時間はｔ２となり、水の少ない場合の
温度ＴＩ＋経過時間ｔ１と大きな差がでてくる。したが
って温度のみあるいは温度勾配のみ、あるいは経過時間
のみだけで沸騰検知すると大きな誤差が生じる。Furthermore, when the amount of water increases, the temperature gradient becomes much smaller as in Curbum 214, and the boiling temperature becomes T2.
+The elapsed time until boiling is t2, and there is a large difference from the temperature TI+elapsed time t1 when there is little water. Therefore, if boiling is detected based only on temperature, temperature gradient, or elapsed time, a large error will occur.
本発明では、以上の誤差を少なくするために、水が少な
い場合は、温度Ｔ１で、鍋に反シがある場合や水の多い
場合は、温度勾配ΔＴ／Δｔで、水が多くて反シが大き
い場合は、経過時間ｔ２で判別する。すなわち、あらか
じめ、温度と温度勾配と、７へ一７′
経過時間を決め、ておき、測定値とその値を比較してど
れかの値が大きくまたは小さくなった時を沸騰と判断す
るものであり、誤差を少々くする仁とができる。In the present invention, in order to reduce the above error, when there is little water, the temperature is T1, and when there is a stain in the pot or there is a lot of water, the temperature gradient ΔT/Δt is used. If is large, the determination is made based on the elapsed time t2. In other words, the temperature, temperature gradient, and elapsed time are determined in advance, the measured values are compared, and boiling is determined when any of the values becomes larger or smaller. Yes, it is possible to reduce the error a little.
よって、本実施例におけるマイクロコンピュータ１２は
第４図に示す制御を行う。すなわち、コイル４へ通電を
開始すると、温度検出により所定温度に達したか否かを
判定する。所定温度に達していなければ、勾配検出手段
からの温度勾配が所定値以下か否かを判定する。所定値
以下でなければ所定時間経過したか否かを判定し、所定
時間経過していなければ、上記動作を繰り返す。そして
、上記判定のどれか一つでも満足したときに沸騰判定を
行い、通電停止を行う。Therefore, the microcomputer 12 in this embodiment performs the control shown in FIG. That is, when the coil 4 starts to be energized, it is determined by temperature detection whether a predetermined temperature has been reached. If the predetermined temperature has not been reached, it is determined whether the temperature gradient from the gradient detection means is less than or equal to a predetermined value. If it is not less than a predetermined value, it is determined whether a predetermined time has elapsed, and if the predetermined time has not elapsed, the above operation is repeated. Then, when any one of the above determinations is satisfied, a boiling determination is made and the energization is stopped.
発明の効果
以上の実施例から明らかなように、本発明によれば、沸
騰検知のデータとして温度、温度勾配および経過時間を
利用するため、水の量が違う場合、鍋等の反シが違う場
合などの場合も、誤差の少ない沸騰検知ができるもので
ある。Effects of the Invention As is clear from the above embodiments, according to the present invention, temperature, temperature gradient, and elapsed time are used as boiling detection data. It is possible to detect boiling with less error in any case.
第１図は本発明の一実施例を示す加熱調理器の回路構成
図、第２図は同構成図、第３図は感温素子の温度と加熱
後経過時間との関係を示すグラフ、第４図は沸騰検知の
だめのプログラムの一例を示すフローチャートである。
１・・・・・・トッププレート、２・・・・・鍋、４・
・・・コイル、６・・・・・・感温素子、１２・・・・
・・マイクロコンピュータ。FIG. 1 is a circuit configuration diagram of a heating cooker showing an embodiment of the present invention, FIG. 2 is a circuit diagram of the same, and FIG. FIG. 4 is a flowchart showing an example of a program for boil detection. 1... Top plate, 2... Pot, 4...
... Coil, 6 ... Temperature sensing element, 12 ...
...Microcomputer.
Claims (1)
水温を間接的に検知する温度検出装置とこの温度検出装
置の出力の勾配を検出する勾配検出装置と、加熱手段を
動作してからの経過時間を計測する計時装置と、一定の
温度、一定の温度勾配および一定の時間を記憶している
記憶装置と、この記憶装置の記憶値と前記温度検出装置
、温度勾配検出装置および計時装置の出力とを比較し、
温度検出装置あるいは計時装置の出力が記憶値より大き
くなった時点あるいは温度勾配検出装置の出力が記憶値
より小さくなった時点で出力する演算装置とよりなる沸
騰検出装置。A heating means for heating the object to be heated, a temperature detection device for indirectly detecting the water temperature of the object to be heated such as a pot, a gradient detection device for detecting the gradient of the output of this temperature detection device, and a temperature detection device for operating the heating means. a timekeeping device that measures the elapsed time since the start of the test; a storage device that stores a certain temperature, a certain temperature gradient, and a certain time; Compare with the output of the timing device,
A boiling detection device comprising an arithmetic device that outputs an output when the output of a temperature detection device or a timing device becomes larger than a stored value, or when the output of a temperature gradient detection device becomes smaller than a stored value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26209487A JPH0675423B2 (en) | 1987-10-16 | 1987-10-16 | Boiling detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26209487A JPH0675423B2 (en) | 1987-10-16 | 1987-10-16 | Boiling detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01105492A true JPH01105492A (en) | 1989-04-21 |
| JPH0675423B2 JPH0675423B2 (en) | 1994-09-21 |
Family
ID=17370950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26209487A Expired - Lifetime JPH0675423B2 (en) | 1987-10-16 | 1987-10-16 | Boiling detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0675423B2 (en) |
-
1987
- 1987-10-16 JP JP26209487A patent/JPH0675423B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0675423B2 (en) | 1994-09-21 |
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