JPS607037Y2 - High frequency heating device - Google Patents
High frequency heating deviceInfo
- Publication number
- JPS607037Y2 JPS607037Y2 JP15805778U JP15805778U JPS607037Y2 JP S607037 Y2 JPS607037 Y2 JP S607037Y2 JP 15805778 U JP15805778 U JP 15805778U JP 15805778 U JP15805778 U JP 15805778U JP S607037 Y2 JPS607037 Y2 JP S607037Y2
- Authority
- JP
- Japan
- Prior art keywords
- heating chamber
- radio wave
- groove
- frequency heating
- metal
- 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
Landscapes
- Control Of High-Frequency Heating Circuits (AREA)
- Constitution Of High-Frequency Heating (AREA)
Description
【考案の詳細な説明】
本考案は高周波加熱装置に関するもので電波漏洩防止構
造を改良したものである。[Detailed Description of the Invention] The present invention relates to a high frequency heating device and is an improved structure for preventing radio wave leakage.
高周波加熱装置の代表的なものである電子レンジの断面
図を第1図に示す。FIG. 1 shows a cross-sectional view of a microwave oven, which is a typical high-frequency heating device.
この第1図において1は加熱室で、2は加熱室を形成し
ている金属箱体、3はドア、4は被加熱物である食品、
5は食品4を均一加熱させるためのターンテーブルで、
6はターンテーブルを回転させるための駆動モータであ
る。In FIG. 1, 1 is a heating chamber, 2 is a metal box forming the heating chamber, 3 is a door, 4 is a food to be heated,
5 is a turntable for uniformly heating food 4;
6 is a drive motor for rotating the turntable.
7はマイクロ波を発振するマグネトロンで、8は加熱室
7内へマイクロ波エネルギーを伝送する導波管である。7 is a magnetron that oscillates microwaves, and 8 is a waveguide that transmits microwave energy into the heating chamber 7.
9は赤外線発生風電熱ヒータ等の金属性ライン10の電
波源防止機構で、この拡大断面図が第2図である。Reference numeral 9 denotes a radio wave source prevention mechanism for a metallic line 10 such as an infrared ray generating wind electric heater, and an enlarged sectional view of this is shown in FIG.
第2図において、金属性ライン10を加熱室1外から加
熱室箱体2の壁面に設けて孔11を通して挿入した構造
では、加熱室1内のマイクロ波は同軸モードを形成して
加熱室外へ漏洩する。In FIG. 2, in the structure in which a metallic line 10 is provided on the wall surface of the heating chamber box 2 from outside the heating chamber 1 and inserted through the hole 11, the microwaves inside the heating chamber 1 form a coaxial mode and flow out of the heating chamber. leak.
従つて、電波漏洩を防止する機構として、金属ライン1
0の周囲に溝の深さ12が使用電波の自由空間波長の約
174の長さを有するチョーク13を構威し、漏洩量を
減衰させている。Therefore, as a mechanism to prevent radio wave leakage, the metal line 1
A choke 13 having a groove depth 12 having a length of about 174 times the free space wavelength of the radio wave used is installed around the 0, to attenuate the amount of leakage.
しかしチョーク13の防止効果のみでは規格を満足でき
ず、チョーク13の後に電波吸収材たとえばフェライト
ゴム14等を付加して規格を満足している。However, the prevention effect of the choke 13 alone does not satisfy the standards, and a radio wave absorbing material such as ferrite rubber 14 is added after the choke 13 to satisfy the standards.
しかしフェライトゴム14は一般に高価でかつ電波を多
量に吸収すると発熱する性質を持ち、問題があった。However, the ferrite rubber 14 is generally expensive and has the property of generating heat when absorbing a large amount of radio waves, which poses a problem.
本考案の目的は、上記した従来技術の欠点をなくし、安
価で漏洩防止効果の優れた機構を具備した高周波加熱装
置を提供するにある。An object of the present invention is to eliminate the drawbacks of the prior art described above, and to provide a high-frequency heating device that is inexpensive and equipped with an excellent mechanism for preventing leakage.
本考案は上記した問題点を解消する方法として、加熱室
壁面の孔に金属性ラインが挿入された構造で、壁面外部
に金属性ラインを中心として凹形の構造をした金属板を
壁面に固定し、この凹形の溝に幅の狭い導体板を波形に
連続に折り曲げ、金属性ラインに垂直に固定する。As a method to solve the above problems, this invention has a structure in which a metal line is inserted into a hole in the wall of the heating chamber, and a metal plate with a concave structure centered on the metal line is fixed to the outside of the wall. Then, a narrow conductor plate is continuously bent into a waveform in this concave groove and fixed perpendicularly to the metal line.
溝の深さは使用電波の自由空間波長の約174の長さと
し、波形状に折り曲げた導体板の高さを自由空間波長の
約174弱の長さにとれば、漏洩防止効果は著しくよい
ということを見い出した。If the depth of the groove is approximately 174 times the free space wavelength of the radio wave used, and the height of the conductor plate bent into a wave shape is approximately 174 times the free space wavelength, the leakage prevention effect will be significantly improved. I discovered that.
このように非常に簡単な構造で、性能の優れた電波漏洩
防止機構を構威し、上記の目的を達成できた。In this way, we were able to achieve the above objectives by creating a highly efficient radio wave leakage prevention mechanism with a very simple structure.
なお、実開昭53−9541号公報をみると、マグネト
ロンから発振された高周波エネルギーが損失なく加熱室
へ導かれるようにした同軸線路の構成が示されている。Incidentally, Japanese Utility Model Application Publication No. 53-9541 discloses a structure of a coaxial line in which high frequency energy oscillated from a magnetron is guided to a heating chamber without loss.
そして、その同軸線路の内導体および外導体を金属で構
威し、内導体を支持するための支持柱には高周波に対し
て絶縁性の材質のものを利用している。The inner and outer conductors of the coaxial line are made of metal, and the support pillars for supporting the inner conductor are made of a material that is insulating against high frequencies.
この構成において絶縁体の支持柱の高さは4分の1波長
になっているが、これは内導体の設けられた位置が電界
強度の最大点と一致するようにしたためで、それにより
高周波エネルギーを損失なく伝送するためである。In this configuration, the height of the insulator support column is 1/4 wavelength, but this is because the position of the inner conductor coincides with the maximum point of electric field strength, which allows high-frequency energy to be This is to transmit the data without loss.
これに対して本考案は高周波エネルギーの伝送が起らな
いように構成する。In contrast, the present invention is configured to prevent transmission of high frequency energy.
以下本考案を実施例図を用いて説明する。The present invention will be explained below using examples.
第3図は本考案−実施例の電波漏洩防止機構の断面図で
ある。FIG. 3 is a cross-sectional view of the radio wave leakage prevention mechanism of the present invention - an embodiment.
加熱室1内にシーズヒータや高圧ケーブル等の金属性ラ
イン10を加熱室外部から加熱室箱体2の壁面に設けた
孔11を通して挿入する構造において、その加熱室外部
に金属板の円筒状の箱体16を加熱室外壁面に設置固定
し、凹形の溝17を全周に構成する。In a structure in which a metal line 10 such as a sheathed heater or a high-voltage cable is inserted into the heating chamber 1 from outside the heating chamber through a hole 11 provided in the wall of the heating chamber box 2, a cylindrical metal plate is installed outside the heating chamber. A box body 16 is installed and fixed on the outer wall surface of the heating chamber, and a concave groove 17 is formed around the entire circumference.
又この金属箱体16の溝17内に波形状に折り曲げた導
体板(以下これを波形板18と呼称する)を固定する。Further, a conductor plate bent into a wave shape (hereinafter referred to as a waveform plate 18) is fixed in the groove 17 of the metal box 16.
金属箱体16深さ19は使用電波の自由空間波長の約1
ハの長さにとり、波形板の高さ20は使用電波の自由空
間波長の約174弱の長さが最も漏洩防止効果があるこ
とを実験的に見い出した。The depth 19 of the metal box 16 is approximately 1 of the free space wavelength of the radio wave used.
It has been experimentally found that the height 20 of the corrugated plate is about 174 times less than the free space wavelength of the radio wave used, which has the best leakage prevention effect.
上述の実験について詳細に述べる。The above experiment will be described in detail.
波形板18を導波管21の中央に、第6図に示すように
設置する。The corrugated plate 18 is installed in the center of the waveguide 21 as shown in FIG.
このような構造において周波数特性を測定すると第7図
に示すような特性曲線を得る。When frequency characteristics are measured in such a structure, a characteristic curve as shown in FIG. 7 is obtained.
この特性曲線をみると、ある周波数で共振したパッドリ
ジェクションフィルタ特性である。Looking at this characteristic curve, it shows the characteristics of a pad rejection filter that resonates at a certain frequency.
この共振点は、波形板の高さや幅及び導波管上壁との間
隙によって決まる。This resonance point is determined by the height and width of the corrugated plate and the gap between it and the upper wall of the waveguide.
そして共振点を加熱装置の使用電波の周波数(2540
MHz)に一致させることは可能で、この時波形板18
の高さを使用電波のほぼ174波長弱にとると、共振周
波数が2450MH2近傍となる。Then, the resonance point is set to the frequency of the radio wave used by the heating device (2540
MHz), and in this case, the corrugated plate 18
If the height of the waveform is approximately a little less than 174 wavelengths of the radio waves used, the resonant frequency will be around 2450MH2.
また波形板を複数個並べて使用すると、周波数特性は広
域帯で減衰効果が大きくなる。Furthermore, when a plurality of corrugated plates are used side by side, the frequency characteristics have a large attenuation effect over a wide band.
次に実用的な構造について述べる。Next, we will discuss the practical structure.
第3図の構造図を右側面から見た図が第4図である。FIG. 4 is a view of the structural diagram of FIG. 3 viewed from the right side.
波形板18は金属性ライン10の周囲に等間隔になるよ
うに金属箱体16に垂直に設置固定する。The corrugated plates 18 are installed and fixed perpendicularly to the metal box 16 at equal intervals around the metal line 10.
波形板18の凸部は多い方が漏洩防止効果は大きいこと
が認められるが、凸部が4個でも十分規格を満足した効
果を示している。It is recognized that the more convex portions the corrugated plate 18 has, the greater the leakage prevention effect, but even with four convex portions, the effect satisfies the standards.
波形板18の金属箱体16への固定については、電波的
に短絡するようにスポット溶接等により固定する。The corrugated plate 18 is fixed to the metal box 16 by spot welding or the like so as to create a radio short circuit.
固定位置は金属箱体の高さのほぼ中央である。The fixed position is approximately at the center of the height of the metal box.
金属箱体16の構造は円筒形状ばかりでなく、第5図に
示したように、矩形状でも溝17の深さが使用電波の自
由空間波長の約174の長さにとり、波形板の高さを使
用電波の自由空間波長の約1八弱の長さにすれば、漏洩
防止効果は変らない。The structure of the metal box body 16 is not limited to a cylindrical shape, but also a rectangular shape as shown in FIG. If the length is about 18 times less than the free space wavelength of the radio waves used, the leakage prevention effect will not change.
以上述べたように同軸モードで漏洩する電波に対して、
金属性ラインの周囲に金属板で形成された溝を構成し、
連続に折り曲げた導体板を溝内に設置固定する簡単な構
造で、規格を十分満足する漏洩防止効果が得られ、高価
な電波吸収材であるフェライトゴムを除去でき、安価に
かつ安全性に優れた電波漏洩防止機構を得た。As mentioned above, regarding radio waves leaking in coaxial mode,
Construct a groove formed by a metal plate around a metal line,
It has a simple structure in which a continuously bent conductor plate is installed and fixed in a groove, and it has a leakage prevention effect that satisfies the standards.It is also inexpensive and has excellent safety because it eliminates ferrite rubber, which is an expensive radio wave absorbing material. A radio wave leakage prevention mechanism was obtained.
第1図は従来の高周波加熱装置の断面図で、第2図は第
1図の電波漏洩防止機構の部分拡大断面図である。
第3図は本考案の漏洩防止機構の部分拡大断面図、第4
図は第3図の側面図である。
第5図は本考案の他の実施例の側面図である。
第6図は本考案を説明する導波管モデルの一部切欠斜視
図、第7図は第6図に示したモデルの特性図である。
1・・・・・・加熱室、2・・・・・・加熱室箱体、5
・・・・・・ターンテーブル、7・・・・・・マグネト
ロン、10・・・・・・金属性ライン、13・・・・・
・チョーク、14・・・・・・電波吸収材、16・・・
・・・金属箱体、17・・・・・・溝、18・・・・・
・波形板。FIG. 1 is a sectional view of a conventional high-frequency heating device, and FIG. 2 is a partially enlarged sectional view of the radio wave leakage prevention mechanism shown in FIG. Figure 3 is a partially enlarged sectional view of the leakage prevention mechanism of the present invention;
The figure is a side view of FIG. 3. FIG. 5 is a side view of another embodiment of the present invention. FIG. 6 is a partially cutaway perspective view of a waveguide model for explaining the present invention, and FIG. 7 is a characteristic diagram of the model shown in FIG. 6. 1...Heating chamber, 2...Heating chamber box, 5
...Turntable, 7...Magnetron, 10...Metallic line, 13...
・Chalk, 14...Radio wave absorbing material, 16...
...Metal box body, 17...Groove, 18...
・Corrugated board.
Claims (1)
において、該金属性ラインの周囲に加熱室外壁と金属箱
体で溝を構威し、上記溝内に連続に折り曲げた導体板を
垂直に設置固定し、該溝の深さを使用電波の自由空間波
長の約174の長さとし、連続に折り曲げた導体板の高
さを上記の約114弱の長さとする電波漏洩防止機構を
具備した高周波加熱装置。In a structure in which a metal line is inserted from the outside into the high-frequency heating chamber, a groove is formed around the metal line by the outer wall of the heating chamber and the metal box, and a continuously bent conductor plate is vertically installed in the groove. High frequency heating equipped with a radio wave leakage prevention mechanism in which the depth of the groove is approximately 174 times the free space wavelength of the used radio wave, and the height of the continuously bent conductor plate is approximately 114 times the length as described above. Device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15805778U JPS607037Y2 (en) | 1978-11-17 | 1978-11-17 | High frequency heating device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15805778U JPS607037Y2 (en) | 1978-11-17 | 1978-11-17 | High frequency heating device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5575096U JPS5575096U (en) | 1980-05-23 |
JPS607037Y2 true JPS607037Y2 (en) | 1985-03-07 |
Family
ID=29149555
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15805778U Expired JPS607037Y2 (en) | 1978-11-17 | 1978-11-17 | High frequency heating device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS607037Y2 (en) |
-
1978
- 1978-11-17 JP JP15805778U patent/JPS607037Y2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5575096U (en) | 1980-05-23 |
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