JPS6248773B2 - - Google Patents
Info
- Publication number
- JPS6248773B2 JPS6248773B2 JP8582782A JP8582782A JPS6248773B2 JP S6248773 B2 JPS6248773 B2 JP S6248773B2 JP 8582782 A JP8582782 A JP 8582782A JP 8582782 A JP8582782 A JP 8582782A JP S6248773 B2 JPS6248773 B2 JP S6248773B2
- Authority
- JP
- Japan
- Prior art keywords
- heating
- humidity
- heating chamber
- magnetron
- sensor
- 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
- 238000010438 heat treatment Methods 0.000 claims description 49
- 238000001816 cooling Methods 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/66—Circuits
- H05B6/68—Circuits for monitoring or control
- H05B6/687—Circuits for monitoring or control for cooking
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/6447—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors
- H05B6/6458—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors using humidity or vapor sensors
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Electric Ovens (AREA)
Description
【発明の詳細な説明】
本発明は、加熱室内の状態を検知するセンサを
備えた高周波加熱装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-frequency heating device equipped with a sensor that detects the state inside a heating chamber.
近年加熱室内の状態を検知するセンサを設け、
このセンサの出力によつて被加熱物の加熱状態を
測定し制御回路を介してマグネトロンの発振状態
を制御する、いわゆる自動加熱を行なう構成の高
周波加熱装置が実用化されている。これにより、
加熱時間をいちいち設定する手間が省けるので使
いやすく、しかも被加熱物の出具合に応じて加熱
条件をかえ、最も適切な加熱を行なうことにより
出来上り状態を良くすることが出来る。この自動
加熱が可能である高周波加熱装置における課題の
一つはセンサがいかに正確に被加熱物近傍の湿度
を検知することができるかということである。第
５図は従来の構成における動作状態を示す図であ
り、図中の、実線で示すセンサ近傍の湿度と、被
加熱物近傍の湿度に大きな差が生じてしまう。こ
れは、マグネトロンの冷却フアンのみでは加熱室
内の湿度分布が不均一であることから生じるもの
である。この特性は被加熱物の温度上昇を正確に
センサが検知することが困難であることを示して
いる。 In recent years, sensors have been installed to detect the conditions inside the heating chamber.
High-frequency heating apparatuses have been put into practical use that are configured to perform so-called automatic heating, in which the heating state of the object to be heated is measured by the output of this sensor and the oscillation state of the magnetron is controlled via a control circuit. This results in
It is easy to use because it saves the trouble of setting the heating time each time, and it is possible to improve the finished product by changing the heating conditions depending on the appearance of the object to be heated and performing the most appropriate heating. One of the challenges in this high-frequency heating device capable of automatic heating is how accurately the sensor can detect the humidity near the object to be heated. FIG. 5 is a diagram showing the operating state of the conventional configuration, and there is a large difference between the humidity near the sensor indicated by the solid line in the diagram and the humidity near the heated object. This occurs because the humidity distribution within the heating chamber is uneven if only the magnetron cooling fan is used. This characteristic indicates that it is difficult for the sensor to accurately detect the temperature rise of the heated object.
本発明は、上記従来の課題を解決するものでセ
ンサの動作により確実に被加熱物の出来上がり状
態を検知させ、安定じた加熱性能を有する高周波
加熱装置を実現しようとするものである。 The present invention solves the above-mentioned conventional problems, and aims to realize a high-frequency heating device that reliably detects the completion state of a heated object through the operation of a sensor and has stable heating performance.
上記目的を達成するために、本発明は、循環フ
アンと冷却フアンを同時に回転させることによ
り、より正確で安定した自動加熱を行なえるもの
であり、最も好ましい加熱の出来上がりを得られ
ることになる。これによつて、加熱装置として最
も大切な基本性能である加熱性能が極めて高い高
周波加熱装置を提供することができる。 In order to achieve the above object, the present invention enables more accurate and stable automatic heating by rotating the circulation fan and the cooling fan at the same time, resulting in the most preferable heating result. This makes it possible to provide a high-frequency heating device with extremely high heating performance, which is the most important basic performance for a heating device.
以下、本発明の一実施例について図面に基づい
て説明する。 Hereinafter, one embodiment of the present invention will be described based on the drawings.
第１図は本発明に関する高周波加熱装置の外観
を示す斜視図である。同図において本体１の前面
にはドア２を開閉自在に設けている。３は操作パ
ネルであり、表示部４とキーボード５を備えてい
る。 FIG. 1 is a perspective view showing the appearance of a high-frequency heating device according to the present invention. In the figure, a door 2 is provided on the front surface of a main body 1 so as to be openable and closable. Reference numeral 3 denotes an operation panel, which includes a display section 4 and a keyboard 5.
第２図において、加熱室６には導波管７を介し
てマグネトロン８を設け、加熱室６内に電波を照
射する。９はマグネトロン８を冷却する冷却フア
ンである。冷却フアン９の冷却風は実線矢印で示
すように、加熱室６に設けた吸気口１０から加熱
室６内に入り、排気口１１からガイド１２を通つ
て外部へ排出される。１３は加熱室６内の気体の
湿度の状態を検出するセンサ力であり、感湿部を
ガイド１２内に配置している。１４は加熱室６内
の気体を循環させる循環フアンであり、前記冷却
フアン９の回転軸に連動している。循環フアン１
４の回転により、加熱室６内の気体は図中破線矢
印のように加熱室６の後壁に設けられた循環吸気
口１５から加熱室６内に吸気され、同じく後壁の
中央部に設けられた循環排気口１６から排気され
る。すなわち、加熱室６内の気体は、循環フアン
１４により撹拌されながら、冷却フアン９により
少しずつ換気される構成である。被加熱物１７に
電波を照射すると、水蒸気を発生する。この水蒸
気は、循環フアン１４により、撹拌され、庫内の
湿度を平均的に均一に高めることとなりガイド１
２内に設けられた湿度センサ１３近傍の湿度も高
める。この湿度の変化を検出することにより、間
接的に被加熱状態を知ることができる。 In FIG. 2, a magnetron 8 is provided in the heating chamber 6 via a waveguide 7, and radio waves are irradiated into the heating chamber 6. 9 is a cooling fan that cools the magnetron 8. The cooling air from the cooling fan 9 enters the heating chamber 6 through an intake port 10 provided in the heating chamber 6, as shown by a solid arrow, and is discharged to the outside through an exhaust port 11 through a guide 12. Reference numeral 13 denotes a sensor force for detecting the humidity state of the gas within the heating chamber 6, and a humidity sensing portion is disposed within the guide 12. Reference numeral 14 denotes a circulation fan that circulates the gas in the heating chamber 6, and is linked to the rotation shaft of the cooling fan 9. circulation fan 1
4, the gas in the heating chamber 6 is sucked into the heating chamber 6 from the circulation intake port 15 provided on the rear wall of the heating chamber 6, as shown by the broken line arrow in the figure, The air is exhausted from the circulation exhaust port 16. That is, the gas in the heating chamber 6 is ventilated little by little by the cooling fan 9 while being stirred by the circulation fan 14 . When the heated object 17 is irradiated with radio waves, water vapor is generated. This water vapor is stirred by the circulation fan 14 and increases the humidity inside the refrigerator evenly and uniformly.
The humidity near the humidity sensor 13 provided in the humidity sensor 2 is also increased. By detecting this change in humidity, the heated state can be indirectly known.
第３図において電源ヒユーズ１８ドアー２の開
閉に連動するドアスイツチ１９高周波加熱及び冷
却フアン９と循環フアン１４を回転させるモータ
２０の主回路を開閉するリレー２１の接点を介し
て高圧トランス２２に接続する。高圧トランス２
２はコンデンサ２３ダイオード２４を介してマグ
ネトロン８に接続する。２５はコントロール基板
であり、低圧トランス２６により電力を供給して
いる。コントロール基板２５にはマイクロコンピ
ユーター２６を設け、変換器Ａ２７を介して、キ
ーボード５と接続している。変換器２７はキーボ
ード５の信号をマイクロコンピユータ（以下マイ
コンと称す）２６用の信号に変換する。マイコン
２６はこの信号内容を表示部４に表示する。セン
サ１３は加熱室６内の気体の湿度を検知し、電気
信号としてマイコン２６に伝える。２１はモータ
２０や高圧トランス２２の電源を開閉するリレー
であり、変換器Ｂ２８を介し、マイコン２６の信
号により動作する。キーボード５、センサ１３の
信号内容は、あらかじめマイコン２６に記憶させ
たプログラムに応じて処理され、その出力内容は
変換器２８を介してリレー２１を開閉する。 In FIG. 3, a power supply fuse 18 is connected to a high-voltage transformer 22 through the contacts of a door switch 19 that is linked to the opening and closing of the door 2, and a relay 21 that opens and closes the main circuit of a motor 20 that rotates the high-frequency heating and cooling fan 9 and the circulation fan 14. . High voltage transformer 2
2 is connected to the magnetron 8 via a capacitor 23 and a diode 24. 25 is a control board, to which power is supplied by a low voltage transformer 26. A microcomputer 26 is provided on the control board 25, and is connected to the keyboard 5 via a converter A27. A converter 27 converts a signal from the keyboard 5 into a signal for a microcomputer (hereinafter referred to as microcomputer) 26. The microcomputer 26 displays the contents of this signal on the display section 4. The sensor 13 detects the humidity of the gas in the heating chamber 6 and transmits it to the microcomputer 26 as an electrical signal. A relay 21 opens and closes the power supply for the motor 20 and the high voltage transformer 22, and is operated by a signal from the microcomputer 26 via a converter B28. The signal contents of the keyboard 5 and the sensor 13 are processed according to a program stored in the microcomputer 26 in advance, and the output contents open and close the relay 21 via the converter 28.
第４図において、横軸に加熱運転開始後の時間
経過を表わし、たて軸に、相対湿度の変化を表わ
す。破線は、被加熱物１７周囲の湿度変化を示し
実線は、センサ１３近傍の湿度変化を示す。加熱
動作が開始され被加熱物１７の温度が徐々上昇す
ると共に、被加熱物１７周辺の湿度も上昇してい
く。それと同時に、ガイド１２内に設けられたセ
ンサ１３近傍の湿度を極めて相関性を有しながら
上昇していく。あらかじめ、マイコン２６に設定
記憶されていた湿度変化量（Δｈ）に、センサ１
３近傍の湿度が変化したら、マイコン２６は、変
換器２０を介して、リレー２１の接点をオフす
る。 In FIG. 4, the horizontal axis represents the passage of time after the start of heating operation, and the vertical axis represents changes in relative humidity. A broken line indicates a change in humidity around the object to be heated 17, and a solid line indicates a change in humidity near the sensor 13. The heating operation is started and the temperature of the object to be heated 17 gradually rises, and the humidity around the object to be heated 17 also rises. At the same time, the humidity near the sensor 13 provided in the guide 12 increases in a highly correlated manner. The sensor 1 is set to the humidity change amount (Δh) that has been set and stored in the microcomputer 26 in advance.
When the humidity around 3 changes, the microcomputer 26 turns off the contact of the relay 21 via the converter 20.
このように本実施例の構成によれば被加熱物１
７の温度上昇すなわち加熱状態を極めて正確にセ
ンサ１３に伝えることが可能となり、より正確な
自動加熱が可能となる。すなわち、被加熱物１７
の形状は一定しているものでは無い為、細く、と
がつた部分が先に加熱され、極めて不安定な蒸気
の発生が、比較的早い時間に起こつたりするが、
循環フアン１４により加熱室６内全体に撹拌さ
れ、センサ１３部の湿度もなだらかな湿度変化が
得られ早切れ等の誤動作が無くなる。又、使用者
によつては、被加熱物１７をガイド１２近傍に置
いたりあるいは、加熱室６前方いつぱいに置いた
りする為、冷却風の流れる通路との関係から、食
品からの蒸気発生量と、センサ１３近傍の湿度変
化の相関が一定しないという問題があつたが、本
実施例の構成によれば、庫内の湿度は平均化さ
れ、常に安定した相関関係が得られる。 In this way, according to the configuration of this embodiment, the object to be heated 1
7, that is, the heating state, can be extremely accurately transmitted to the sensor 13, and more accurate automatic heating is possible. That is, the object to be heated 17
Because the shape of the gas is not constant, the thin, sharp parts are heated first, and extremely unstable steam is generated relatively quickly.
The entire inside of the heating chamber 6 is stirred by the circulation fan 14, and the humidity at the sensor 13 section can be smoothly changed, thereby eliminating malfunctions such as premature cut-off. Also, depending on the user, the object to be heated 17 is placed near the guide 12 or is placed completely in front of the heating chamber 6, so the amount of steam generated from the food and However, according to the configuration of this embodiment, the humidity inside the refrigerator is averaged, and a stable correlation can always be obtained.
なお、加熱室６に電熱ヒータを設ければ、本発
明の循環フアン１４と共に同時に作動させること
により熱風循環方式のオーブン機能付、自動電子
レンジとしても有効な構成であることはいうまで
もない。 It goes without saying that if an electric heater is provided in the heating chamber 6, it can be operated simultaneously with the circulation fan 14 of the present invention to provide an effective configuration as an automatic microwave oven with a hot air circulation type oven function.
第１図は本発明の一実施例である高周波加熱装
置の外観斜視図、第２図は同装置の構造を示す平
面断面図、第３図は同装置の制御回路図、第４図
は同装置の動作状態を示す特性図、第５図は従来
の高周波加熱装置の動作状態を示す特性図であ
る。
６……加熱室、８……マグネトロン（高周波発
振器）、９……冷却フアン、１３……湿度セン
サ、１４……循環フアン。
Fig. 1 is an external perspective view of a high-frequency heating device that is an embodiment of the present invention, Fig. 2 is a plan sectional view showing the structure of the device, Fig. 3 is a control circuit diagram of the device, and Fig. 4 is the same. FIG. 5 is a characteristic diagram showing the operating state of the device. FIG. 5 is a characteristic diagram showing the operating state of the conventional high-frequency heating device. 6... Heating chamber, 8... Magnetron (high frequency oscillator), 9... Cooling fan, 13... Humidity sensor, 14... Circulation fan.
Claims (1)
記マグネトロンを冷却しかつ前記加熱室内の気体
を強制排気させる冷却フアンと前記加熱室内の気
体を強制循環させる循環フアンと、前記加熱室内
の湿度を検知する湿度センサーと、前記湿度セン
サーの情報により前記マグネトロンの加熱動作を
制御する制御回路とを備え、前記冷却フアンと循
環フアンを同時に回転させながら前記湿度センサ
ーと制御回路により前記マグネトロンの加熱を制
御する構成とした高周波加熱装置。1. A magnetron that irradiates radio waves into the heating chamber, a cooling fan that cools the magnetron and forcibly exhausts gas within the heating chamber, a circulation fan that forcibly circulates the gas within the heating chamber, and detects the humidity within the heating chamber. A configuration comprising a humidity sensor and a control circuit that controls heating operation of the magnetron based on information from the humidity sensor, and controls heating of the magnetron using the humidity sensor and the control circuit while simultaneously rotating the cooling fan and circulation fan. High frequency heating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8582782A JPS58203325A (en) | 1982-05-20 | 1982-05-20 | High frequency heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8582782A JPS58203325A (en) | 1982-05-20 | 1982-05-20 | High frequency heating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58203325A JPS58203325A (en) | 1983-11-26 |
| JPS6248773B2 true JPS6248773B2 (en) | 1987-10-15 |
Family
ID=13869678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8582782A Granted JPS58203325A (en) | 1982-05-20 | 1982-05-20 | High frequency heating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58203325A (en) |
-
1982
- 1982-05-20 JP JP8582782A patent/JPS58203325A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58203325A (en) | 1983-11-26 |
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