JP2650352B2 - High frequency heating equipment - Google Patents
High frequency heating equipmentInfo
- Publication number
- JP2650352B2 JP2650352B2 JP63220961A JP22096188A JP2650352B2 JP 2650352 B2 JP2650352 B2 JP 2650352B2 JP 63220961 A JP63220961 A JP 63220961A JP 22096188 A JP22096188 A JP 22096188A JP 2650352 B2 JP2650352 B2 JP 2650352B2
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- Japan
- Prior art keywords
- heating
- heated
- weight
- time
- unit
- 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.)
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Description
【発明の詳細な説明】 産業上の利用分野 本発明は重量センサを備え、加熱時間を自動的に制御
するよう構成した電子レンジ等の加熱装置に係わる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating device such as a microwave oven provided with a weight sensor and configured to automatically control a heating time.
従来の技術 センサを備えて加熱時間を自動的に制御する加熱装置
は、すぐに広く実用化されている。例えば電子レンジに
おいては、湿度センサやガスセンサと重量センサを組み
合わせたものが商品化されている。2. Description of the Related Art Heating devices equipped with sensors and automatically controlling the heating time are immediately and widely put into practical use. For example, in a microwave oven, a combination of a humidity sensor, a gas sensor, and a weight sensor has been commercialized.
特願昭58−240108号（特開昭60−131793号公報）に記
載の自動高周波加熱装置は、このような複合センサを備
えた一例である。この自動高周波加熱装置は、被加熱物
から発生するガスあるいは蒸気を検出する気体センサ
と、被加熱物の重量を検出する重量センサとを備えてお
り、前者は被加熱物の加熱の仕上がりを検出し、後者は
被加熱物の加熱前の初期重量から最大加熱時間を算出
し、この時間を超えては加熱が行われないよう監視す
る。An automatic high-frequency heating apparatus described in Japanese Patent Application No. 58-240108 (Japanese Patent Application Laid-Open No. 60-131793) is an example provided with such a composite sensor. This automatic high-frequency heating device has a gas sensor that detects gas or vapor generated from the object to be heated, and a weight sensor that detects the weight of the object to be heated, and the former detects the finish of heating of the object to be heated. In the latter case, the maximum heating time is calculated from the initial weight of the object to be heated before heating, and monitoring is performed so that heating is not performed beyond this time.
このように二つのセンサで得られた情報に基づき、加
熱が並列に制御されるので、気体センサのみで加熱を終
了させると過加熱になりやすい少量の被加熱物が、重量
センサによる最大加熱時間制御により早めに加熱停止
し、全般的に分量対応の改善が図られた。As described above, heating is controlled in parallel based on the information obtained by the two sensors. Heating was stopped early by the control, and overall improvement in the quantity handling was achieved.
また気体センサが壊れたり、何らかの理由で検知がで
きなかったときにも極めて安全であった。It was also extremely safe when the gas sensor was broken or could not be detected for some reason.
発明が解決しようとする課題 ところが、このような従来の構成の自動高周波加熱装
置は、最大加熱時間を次式に示すような一次式で算出し
ていた。Problems to be Solved by the Invention However, in such an automatic high-frequency heating apparatus having such a conventional configuration, the maximum heating time is calculated by a linear equation as shown in the following equation.
T0＝AW0 ……（１） ただし T0:最大動作時間 A:定数 W0:被加熱物の重量 ところが実際の被加熱物の最適加熱時間は、このよう
な一次式の情には乗らず、第１図に示すように大量にな
るほどこの一次式から外れ、やや最適加熱時間が短くな
る傾向があった。ここで最大動作時間とはすでに記載し
たようにこの時間を超えては加熱が行われないよう監視
する時間であり、一方、最適加熱時間とは被加熱物が適
切に加熱される時間のことである。T 0 = AW 0 …… (1) where T 0 : maximum operating time A: constant W 0 : weight of the object to be heated However, the actual optimal heating time of the object to be heated depends on such a linear expression. However, as shown in FIG. 1, there was a tendency that the larger the amount, the more deviated from this linear equation and the shorter the optimal heating time. Here, the maximum operation time is a time for monitoring the heating so as not to be performed beyond this time as described above, while the optimal heating time is a time during which the object to be heated is appropriately heated. is there.
これは加熱装置が例えば電子レンジの場合には、被加
熱物の量により加熱手段たるマグネトロンの負荷特性が
変化し、一般に少量負荷よりは大量の方が高周波出力が
大きくなるため効率良く加熱され、少量よりは加熱時間
が短くてすむことによるものと考えられる。This is because when the heating device is, for example, a microwave oven, the load characteristic of the magnetron as the heating means changes depending on the amount of the object to be heated. It is considered that the heating time is shorter than in a small amount.
電気オーブンのような雰囲気加熱では、分量に比例し
て最適加熱時間が長くなることはないが、電子レンジほ
どではないにせよやはり被加熱物の分量に応じてわずか
に加熱時間は延びる。これは被加熱物の中央に熱が伝達
するのに要する時間遅れと、冷たい被加熱物が加熱室内
の温度を低下させてしまう度合いの違いによるものであ
る。In an atmosphere heating such as an electric oven, the optimum heating time does not become longer in proportion to the amount, but the heating time slightly increases depending on the amount of the object to be heated, though not as much as in a microwave oven. This is due to the difference between the time delay required for heat transfer to the center of the object to be heated and the degree to which the temperature of the cold object lowers the temperature in the heating chamber.
このように最適加熱時間は被加熱物の量に応じてリニ
アには変化しない。最大動作時間は最適加熱時間よりは
若干長めに設定されるが、従来のように一次式で算出さ
れた最大動作時間は、少量では最適加熱時間との差が小
さく、仮に最大動作時間まで通電が継続されてもまずま
ずの出来となるが、大量では最適時間からのズレが大き
く、仮に最大動作時間まで通電が継続されるともはや過
加熱の程度がひどく、安全装置としての機能は果たせて
も仕上がりセンサとしての機能は果たせなかった。Thus, the optimal heating time does not change linearly according to the amount of the object to be heated. Although the maximum operating time is set slightly longer than the optimal heating time, the maximum operating time calculated by the primary equation as in the past is small for small amounts and the optimal heating time. Even if it is continued, it will be a reasonable result, but if it is large, the deviation from the optimal time is large, and if the power is continued up to the maximum operation time, the degree of overheating will be severe, and even if the function as a safety device can be fulfilled, it will be finished The function as a sensor could not be fulfilled.
本発明はかかる背景に鑑みて、被加熱物の初期重量を
もとに算出する最大動作時間を、少量から大量までいず
れの分量でも最適加熱時間にほぼ一致させるよう設定す
ることを目的とする。In view of such a background, an object of the present invention is to set a maximum operation time calculated based on an initial weight of an object to be heated so that the maximum operation time is almost equal to an optimum heating time in any amount from a small amount to a large amount.
課題を解決するための手段 本発明は、上記問題点を解決するために、被加熱物を
加熱する加熱室と、この加熱室に結合された加熱手段
と、この加熱手段への給電を制御し、演算手段を有する
制御部と、被加熱物を載置する載置台と、少なくともこ
の載置台上の被加熱物の重量を検出する重量検出手段と
により構成される。Means for Solving the Problems In order to solve the above problems, the present invention controls a heating chamber for heating an object to be heated, a heating means coupled to the heating chamber, and a power supply to the heating means. , A control unit having an arithmetic unit, a mounting table on which the object to be heated is mounted, and weight detection means for detecting at least the weight of the object to be heated on the mounting table.
作用 本発明の加熱装置は、制御部が重量検出手段を介して
載置台上の被加熱物の重量を検出し、制御部は被加熱物
の重量と被加熱物が適切に加熱される最適加熱時間との
関係を実験的に求めた高次の近似式を記憶し、重量検出
手段を介して検出した載置台上の被加熱物の重量をもと
に上記近似式を用いて最適加熱時間を演算手段を用いて
演算し、かかる演算結果に基づいて得られた加熱時間が
経過した時点で前記加熱手段への給電を停止する。According to the heating device of the present invention, the control unit detects the weight of the object to be heated on the mounting table via the weight detection unit, and the control unit determines the optimal heating of the object and the object to be heated appropriately. A high-order approximation formula experimentally obtained from the relationship with time is stored, and the optimal heating time is calculated using the above approximation formula based on the weight of the object to be heated on the mounting table detected through the weight detection means. Calculation is performed using the calculation means, and when the heating time obtained based on the calculation result has elapsed, power supply to the heating means is stopped.
実 施 例 以下、本発明に係わる加熱装置を図面を参照して説明
する。Embodiments Hereinafter, a heating device according to the present invention will be described with reference to the drawings.
第２図は本発明に係わる電子レンジの如き加熱装置の
本体斜視図である。FIG. 2 is a perspective view of a main body of a heating device such as a microwave oven according to the present invention.
本体１の前面には開閉自在に扉体２が設けられ操作パ
ネル３が配されている。操作パネル３上には、種々の加
熱指令キー４が配置されている。この中には、加熱のカ
テゴリーあるいは被加熱物の種類を指定することにより
自動加熱を指令するものと、加熱時間や加熱出力を使用
者が自ら設定する手動加熱を指令するものとがある。A door 2 is provided on the front surface of the main body 1 so as to be openable and closable, and an operation panel 3 is provided. Various heating command keys 4 are arranged on the operation panel 3. Among these, there are a type instructing automatic heating by designating a category of heating or a type of an object to be heated, and a type instructing manual heating in which a user sets a heating time and a heating output by himself.
第３図は本発明に係わる加熱装置のシステム構成を示
すブロック図の一実施例である。FIG. 3 is an embodiment of a block diagram showing a system configuration of a heating device according to the present invention.
操作パネル３上の加熱指令キー４から入力された種々
の加熱指令は、制御部５によって解読され、所定の表示
が行われる。Various heating commands input from the heating command key 4 on the operation panel 3 are decoded by the control unit 5 and a predetermined display is performed.
加熱室６には載置台７上に被加熱物８が載置され、加
熱手段９たるマグネトロンによって加熱される。マグネ
トロン９はドライバ10を介して、制御部５により給電を
制御される。An object to be heated 8 is placed on a mounting table 7 in the heating chamber 6 and heated by a magnetron as a heating means 9. The power supply of the magnetron 9 is controlled by the control unit 5 via the driver 10.
載置台７は、被加熱物８の加熱ムラの改善を図るた
め、駆動源11により加熱時に回転駆動される。そしてス
ラスト方向に自在に動く駆動源11の駆動軸の先端には、
重量検出手段12が機械的に結合されている。The mounting table 7 is rotated by a driving source 11 at the time of heating in order to improve uneven heating of the object 8 to be heated. And at the tip of the drive shaft of the drive source 11 that freely moves in the thrust direction,
The weight detecting means 12 is mechanically connected.
このような重量検出手段としては、ひずみゲージや静
電容量型の圧力センサ・変移センサなどが利用できる。
13は検出回路である。As such a weight detecting means, a strain gauge, a capacitance type pressure sensor, a displacement sensor, or the like can be used.
13 is a detection circuit.
さて制御部５は後述するように演算手段を有してお
り、上記の重量検出手段により測定した被加熱物の重量
W0をもとに最大動作時間を算出する。第１図の実際の被
加熱物の最適加熱時間から近似式を求めたところ、２次
式程度で良好な一致をみた。ｃ項の設定で加熱性能が調
整できる。The control unit 5 has a calculating means as described later, and the weight of the object to be heated measured by the weight detecting means described above.
The W 0 to calculate the maximum operating time to the original. When an approximate expression was obtained from the optimum heating time of the actual object to be heated in FIG. 1, a good agreement was obtained with a quadratic expression. The heating performance can be adjusted by setting the item c.
T0＝aW0 2＋bW0＋ｃ ……（２） ただし ａ、ｂ、c:定数 従って従来のように気体センサと重量センサとを組み
合わさなくとも、重量センサのみによる最大動作時間だ
けで、自動加熱を行う構成も可能である。T 0 = aW 0 2 + bW 0 + c (2) where a, b, and c are constants. Therefore, even if the gas sensor and the weight sensor are not combined as in the related art, the automatic heating is performed only by the maximum operation time using only the weight sensor. Is also possible.
また手動加熱の際にも、被加熱物の重量をもとに最大
動作時間を決定することは有用なことであり、異常な加
熱時間が設定されても、被加熱物の火災などの危険を未
然に防止できる。In manual heating, it is useful to determine the maximum operating time based on the weight of the object to be heated. It can be prevented before it happens.
第４図はかかるシステムの具体的な回路構成の一実施
例を示す。制御部５はマイコンにより形成され、重量セ
ンサ12としては静電容量型の圧力センサが用いられてい
る。検出回路13としては発振回路が利用され、オペアン
プののこぎり波発生回路と波形整形回路の組み合わせで
形成されている。FIG. 4 shows an embodiment of a specific circuit configuration of such a system. The control unit 5 is formed by a microcomputer, and a capacitance type pressure sensor is used as the weight sensor 12. An oscillation circuit is used as the detection circuit 13, and is formed by a combination of a saw-tooth wave generation circuit of an operational amplifier and a waveform shaping circuit.
かかる発振回路13の出力パルスは、マイコン５の内蔵
カウンタの入力端子TCに接続される。The output pulse of the oscillation circuit 13 is connected to the input terminal TC of the built-in counter of the microcomputer 5.
22は電圧変換および波形整形をするレベルシフト回路
であり、必要に応じて適宜付加すればよい。Reference numeral 22 denotes a level shift circuit that performs voltage conversion and waveform shaping, and may be added as needed.
例えば、オペアンプはTL082、マイコンはMB88515で実
現できるが、これに相当する機能を有するものであれば
利用できるのは言うまでもない。For example, the operational amplifier can be realized by TL082 and the microcomputer can be realized by MB88515, but it goes without saying that any device having a function corresponding to this can be used.
第５図はかかるマイコンの制御プログラムを示すフロ
ーチャートである。FIG. 5 is a flowchart showing a control program of the microcomputer.
重量の測定がスタートされると、TC端子に接続される
内蔵カウンタが起動され（ａ）、出力パルスの測定が開
始される。When the weight measurement is started, the built-in counter connected to the TC terminal is started (a), and the measurement of the output pulse is started.
そしてカウンタのゲート時間、例えば１秒、がタイマ
割り込みなどを用いて管理され（ｂ）、この所定時間が
経過すると、カウンタが停止される（ｃ）。かかる計数
結果はRAMの所定アドレスに転送され、記憶される
（ｄ）。Then, the gate time of the counter, for example, 1 second, is managed using a timer interrupt or the like (b), and when this predetermined time has elapsed, the counter is stopped (c). The counting result is transferred to a predetermined address of the RAM and stored (d).
かかる処理を経て、RAMに記憶されたカウント数は、
やはり２次式もしくは３次式にて重量に換算される
（ｅ）。After such processing, the count number stored in the RAM is:
Again, it is converted to weight by the quadratic or cubic formula (e).
W0＝Af2＋Bf＋Ｃ ……（３） ただし f:カウンタ数 A:定数 B:定数 C:定数 そしてかかる重量値をもとにさらに最大加熱時間が算
出される（ｆ）。これはすでに述べた通りである。W 0 = Af 2 + Bf + C (3) where f: number of counters A: constant B: constant C: constant and the maximum heating time is further calculated based on the weight value (f). This is as described above.
T0＝aW0 2＋bW0＋ｃ ……（２） ただし ａ、ｂ、c:定数 次いで加熱手段への給電が開始され（ｇ）、T0が経過
したどうかが調べられる（ｈ）。もしT0が経過すれば無
条件に加熱手段への給電は停止される（ｋ）。T 0 = aW 0 2 + bW 0 + c (2) where a, b, c: constants Next, power supply to the heating means is started (g), and it is checked whether T 0 has elapsed (h). If T 0 has elapsed, the power supply to the heating means is unconditionally stopped (k).
T0が経過していなければ、次に自動加熱かどうかが検
査され（ｉ）、手動加熱のときのみ、設定加熱時間が経
過したかどうかが監視される（ｊ）。手動時に設定時間
が経過しておれば、加熱手段への給電は停止される
（ｋ）。If T 0 has not elapsed, it is then checked whether automatic heating has been performed (i), and only during manual heating, it is monitored whether the set heating time has elapsed (j). If the set time has elapsed during manual operation, power supply to the heating means is stopped (k).
発明の効果 以上のように本発明の加熱装置は、少量から大量ま
で、実際の最適加熱時間によく一致した動作時間を得る
ことができ、安全性を一層蔵すことができる。また従来
のように気体センサと重量センサとを併用しなくとも、
重量センサのみで加熱を自動的に終了させることもでき
る。Effects of the Invention As described above, the heating device of the present invention can obtain an operation time from a small amount to a large amount that is in good agreement with the actual optimum heating time, and can further enhance safety. Also, without using a gas sensor and a weight sensor as in the past,
The heating can be automatically terminated only by the weight sensor.
第１図は本発明に係わる実際の被加熱物の加熱最適時間
と最大動作時間の算出方法を示す線図、第２図は本発明
に係わる電子レンジの如き加熱装置の本体斜視図、第３
図は本発明に係わる加熱装置のシステム構成を示すブロ
ック図、第４図は本発明の一具体例を示す回路図、第５
図は制御プログラムの構造を示すフローチャートであ
る。 ５……制御部、６……加熱室、７……載置台、８……被
加熱物、９……加熱手段、12……重量検出手段。FIG. 1 is a diagram showing a method of calculating an actual optimum heating time and a maximum operation time of an object to be heated according to the present invention. FIG. 2 is a perspective view of a main body of a heating device such as a microwave oven according to the present invention.
FIG. 4 is a block diagram showing a system configuration of a heating apparatus according to the present invention. FIG. 4 is a circuit diagram showing a specific example of the present invention.
The figure is a flowchart showing the structure of the control program. 5: control unit, 6: heating chamber, 7: mounting table, 8: object to be heated, 9: heating means, 12: weight detection means.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 黄地 謙三 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 昭60−131793（ＪＰ，Ａ) 実開 昭55−137490（ＪＰ，Ｕ) ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenzo Koji 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-60-131793 (JP, A) −137490 (JP, U)
Claims (1)
に結合された加熱手段と、この加熱手段への給電を制御
し、演算手段を有する制御部と、被加熱物を載置する載
置台と、少なくともこの載置台上の被加熱物の重量を検
出する重量検出手段とより成り、前記制御部は前記重量
検出手段を介して前記載置台上の被加熱物の重量を検出
し、その測定値W0をもとに前記演算手段により最適加熱
時間T0をT0＝aW0 2＋bW0＋ｃ（ただしａ、ｂ、c:定数）
で算出し、かかる演算結果に基づいて得られた加熱時間
が経過した時点で前記加熱手段への給電を停止するよう
に構成した高周波加熱装置。1. A heating unit for heating an object to be heated, a heating unit coupled to the heating room, a control unit having a calculation unit for controlling power supply to the heating unit, and a unit for mounting the object to be heated. And a weight detecting means for detecting at least the weight of the object to be heated on the mounting table, wherein the control unit detects the weight of the object to be heated on the mounting table via the weight detecting means. Based on the measured value W 0 , the arithmetic means calculates the optimum heating time T 0 as T 0 = aW 0 2 + bW 0 + c (a, b, c: constants)
And a power supply to the heating means is stopped when a heating time obtained based on the calculation result has elapsed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63220961A JP2650352B2 (en) | 1988-09-02 | 1988-09-02 | High frequency heating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63220961A JP2650352B2 (en) | 1988-09-02 | 1988-09-02 | High frequency heating equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0268884A JPH0268884A (en) | 1990-03-08 |
| JP2650352B2 true JP2650352B2 (en) | 1997-09-03 |
Family
ID=16759271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63220961A Expired - Lifetime JP2650352B2 (en) | 1988-09-02 | 1988-09-02 | High frequency heating equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2650352B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3938181B2 (en) * | 2000-04-17 | 2007-06-27 | 松下電器産業株式会社 | High frequency heating device |
| JP4621932B2 (en) * | 2006-04-28 | 2011-02-02 | タイヨーエレック株式会社 | Locking device and game machine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55137490U (en) * | 1979-03-23 | 1980-09-30 | ||
| JPS60131793A (en) * | 1983-12-20 | 1985-07-13 | 松下電器産業株式会社 | Automatic high frequency heater |
-
1988
- 1988-09-02 JP JP63220961A patent/JP2650352B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0268884A (en) | 1990-03-08 |
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