JP2725938B2 - High frequency heating equipment - Google Patents
High frequency heating equipmentInfo
- Publication number
- JP2725938B2 JP2725938B2 JP3528292A JP3528292A JP2725938B2 JP 2725938 B2 JP2725938 B2 JP 2725938B2 JP 3528292 A JP3528292 A JP 3528292A JP 3528292 A JP3528292 A JP 3528292A JP 2725938 B2 JP2725938 B2 JP 2725938B2
- Authority
- JP
- Japan
- Prior art keywords
- waveguide
- microwave
- power supply
- frequency generator
- heating chamber
- 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
- 238000010438 heat treatment Methods 0.000 title claims description 26
- 230000005855 radiation Effects 0.000 claims description 6
- 238000005259 measurement Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Landscapes
- Constitution Of High-Frequency Heating (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高周波発生装置で発生
したマイクロ波を導波管を介して加熱室内に給電する高
周波加熱装置の改良に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a high-frequency heating apparatus for feeding microwaves generated by a high-frequency generator into a heating chamber through a waveguide.
【０００２】[0002]
【従来の技術】図５に示すごとく、導波管１の上下端部
に加熱室２と結合する上給電口３、及び下給電口４を設
け、この導波管１の中間部にマグネトロン５を取り付け
て、加熱に必要な量のマイクロ波を発生させるためのバ
ックプランジャ（ＢＰ）を省略するとともに、マグネト
ロン５のアンテナ６中心と導波管の一端との距離をｎ1
ｌ、他端との距離ｎ2ｌ（但し、ｌは高周波発生装置
が、強力なマイクロ波を発生させるのに必要なバックプ
ランジャの長さ）とし、且つｎ1＝２.５〜３.５、ｎ2＝
６.０〜７.５に設定することにより、加熱に必要にして
十分なマイクロ波を得る高周波加熱装置が、特開平２−
２４４５８９号公報に開示されている。2. Description of the Related Art As shown in FIG. 5, an upper power supply port 3 and a lower power supply port 4 which are connected to a heating chamber 2 are provided at upper and lower ends of a waveguide 1, and a magnetron 5 is provided at an intermediate portion of the waveguide 1. , A back plunger (BP) for generating an amount of microwave required for heating is omitted, and the distance between the center of the antenna 6 of the magnetron 5 and one end of the waveguide is set to n 1.
l, distance n 2 l from the other end (where l is the length of the back plunger necessary for the high frequency generator to generate a strong microwave), and n 1 = 2.5 to 3.5 , N 2 =
A high-frequency heating apparatus which obtains a sufficient microwave required for heating by setting the value to 6.0 to 7.5 is disclosed in
No. 244589.
【０００３】しかし、バックプランジャｌ＝１８.６ｍ
ｍとすると、導波管の全長（ｎ1ｌ＋ｎ2ｌ）は、１５
８.１〜２０４.６ｍｍと長くなり小型化できない。However, the back plunger 1 = 18.6 m
m, the total length of the waveguide (n 1 l + n 2 l) is 15
The length is increased to 8.1 to 204.6 mm, and the size cannot be reduced.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、導波管の中
間部に高周波発生装置を取り付け、高周波発生装置から
のマイクロ波を導波管の両端部に設けた給電口を介し
て、加熱室内に効率よくマイクロ波を供給するととも
に、導波管形状の最適化、小型化を図るものである。SUMMARY OF THE INVENTION According to the present invention, a high-frequency generator is attached to an intermediate portion of a waveguide, and microwaves from the high-frequency generator are heated through power supply ports provided at both ends of the waveguide. The objective is to efficiently supply microwaves to a room, optimize the shape of the waveguide, and reduce the size.
【０００５】[0005]
【課題を解決するための手段】本発明は、高周波発生装
置で発生したマイクロ波を、導波管により給電口に導
き、給電口から加熱室内にマイクロ波を供給する高周波
加熱装置において、高周波発生装置の放射アンテナより
相対向する二方向に、加熱室と結合する給電口を有する
導波管を設けるとともに、この導波管の全長を［Ｎλｇ
／２］±λｇ／３２（但しＮは０を含まない整数、λｇ
は導波管内波長）に設定する。SUMMARY OF THE INVENTION The present invention relates to a high-frequency heating apparatus for guiding a microwave generated by a high-frequency generator to a power supply port by a waveguide and supplying the microwave from the power supply port into a heating chamber. A waveguide having a feed port coupled to a heating chamber is provided in two directions opposed to the radiation antenna of the device, and the total length of the waveguide is set to [Nλg
/ 2] ± λg / 32 (where N is an integer not including 0, λg
(Wavelength in the waveguide).
【０００６】又、導波管の一方の短絡面から［λｇ／４
＋Ｎλｇ／２］±λｇ／１６（但しＮは０を含まない整
数、λｇは導波管内波長）の位置に、高周波発生装置の
放射アンテナを配設する。Also, [λg / 4
+ Nλg / 2] ± λg / 16 (where N is an integer not including 0, and λg is the wavelength in the waveguide), and the radiation antenna of the high-frequency generator is disposed.
【０００７】[0007]
【作用】導波管内に整った定在波を形成させ、高周波発
生装置のアンテナを定在波の電界極大点近傍に位置させ
ることにより、高周波発生装置で発生するマイクロ波
を、効率よく加熱室に供給できる。[Function] By forming a regular standing wave in the waveguide and positioning the antenna of the high frequency generator near the electric field maximum of the standing wave, the microwave generated by the high frequency generator can be efficiently heated. Can be supplied.
【０００８】[0008]
【実施例】図１及び図２は、本発明実施例の加熱室に高
周波発生装置を取り付けた外観斜視図、及び要部拡大断
面図を示し、上記従来例と同一部分は同一符号を付して
説明する。1 and 2 are an external perspective view of a heating chamber according to an embodiment of the present invention, in which a high-frequency generator is mounted, and an enlarged sectional view of a main part. Will be explained.
【０００９】幅８０ｍｍの導波管１（導波管内波長λｇ
／２≒９４.２ｍｍ）の上下端部に、加熱室２と結合す
る上給電口３、及び下給電口４を設け、この導波管１の
中間部に高周波発生装置であるマグネトロン５を取り付
ける。A waveguide 1 having a width of 80 mm (wavelength λg in the waveguide)
An upper power supply port 3 and a lower power supply port 4 to be connected to the heating chamber 2 are provided at the upper and lower ends of (/ 2 94.2 mm), and a magnetron 5 which is a high frequency generator is attached to an intermediate portion of the waveguide 1. .
【００１０】そして、「導波管内のマイクロ波伝播ロス
を少なくするためには、導波管内の電磁界分布を整える
べきである」との前提で、加熱室２と結合する給電口
３、４の影響をも含め、導波管内に整った定在波が形成
される導波管１の全長Ｌを求めるべく、導波管１の全長
Ｌを種々変化させるとともに、同一導波管長においても
マイクロ波放射アンテナ６の位置ｌ1、及び給電口３、
４の寸法並びに給電口３、４の位置を変化させて、国際
標準ＩＥＣ７０５の出力測定法に基づきマイクロ波出力
を測定した。Then, on the premise that "in order to reduce the microwave propagation loss in the waveguide, the electromagnetic field distribution in the waveguide should be adjusted", the power supply ports 3, 4 coupled to the heating chamber 2 are provided. In order to determine the total length L of the waveguide 1 in which a standing wave is formed in the waveguide, including the effect of Position l 1 of the wave radiation antenna 6 and the feed port 3,
The microwave power was measured based on the power measurement method of International Standard IEC705 while changing the dimensions of the power supply 4 and the positions of the power supply ports 3 and 4.
【００１１】その実験測定デ−タを、導波管の全長Ｌと
測定された最大出力との関係で整理すると、図３に示す
ごとく導波管１の全長Ｌが、略λｇ／２の時にマイクロ
波出力が最大となる結果を得た。しかし、通常ＩＥＣの
出力測定では、室温、温度計精度等から１５Ｗ程度の誤
差が発生することから、最大出力より１５Ｗマイナスし
た範囲を適正範囲とすると、Ｌ≒８８〜１００ｍｍとな
り、これを管内波長λｇで表現すると、Ｌ＝［Ｎ×λｇ
／２］±λｇ／３２（但し、Ｎは０を含まない整数）と
なる。The experimental measurement data is summarized by the relationship between the total length L of the waveguide and the measured maximum output. As shown in FIG. 3, when the total length L of the waveguide 1 is approximately λg / 2, The result that the microwave output becomes maximum was obtained. However, in the output measurement of the IEC, an error of about 15 W occurs due to the room temperature, the accuracy of the thermometer, and the like. Therefore, if a range obtained by subtracting 15 W from the maximum output is set to an appropriate range, L〜88 to 100 mm, and this becomes the guide wavelength. In terms of λg, L = [N × λg
/ 2] ± λg / 32 (where N is an integer not including 0).
【００１２】次に、導波管の全長Ｌを９４.２ｍｍ（λ
ｇ／２）に固定して、マイクロ波放射アンテナの位置ｌ
1を種々変化させるとともに、給電口の寸法並びに給電
口の位置を変化させてマイクロ波出力を測定し、アンテ
ナの位置ｌ1と最大出力との関係で測定データを整理す
ると、図４に示すごとくアンテナの位置ｌ1は導波管１
の中央付近で最大となり、上記と同様の出力測定誤差に
基づく適正範囲を考慮して、アンテナの位置ｌ1を管内
波長λｇで表現すると、アンテナの位置ｌ1＝［λｇ／
４＋Ｎ×λｇ／２］±λｇ／１６（但し、Ｎは０を含ま
ない整数）となる。Next, the total length L of the waveguide is set to 94.2 mm (λ
g / 2) and the position l of the microwave radiating antenna
Causes variously changed 1 and by changing the position of the dimensions and the feed port of the feed port to measure the microwave power, to organize measurement data in relation to the position l 1 and the maximum output of the antenna, as shown in FIG. 4 Antenna position l 1 is waveguide 1
, The antenna position l 1 is represented by the guide wavelength λg in consideration of the appropriate range based on the same output measurement error as above, and the antenna position l 1 = [λg /
4 + N × λg / 2] ± λg / 16 (where N is an integer not including 0).
【００１３】従って、導波管内に配設されるマイクロ波
放射アンテナを、導波管の電界極大点に設けることによ
り、ダイポールアンテナとして作用させ、両給電口より
マイクロ波を効率よく加熱室に供給することができる。Therefore, the microwave radiating antenna provided in the waveguide is provided at the maximum point of the electric field of the waveguide, so that it functions as a dipole antenna, and the microwave is efficiently supplied to the heating chamber from both feeding ports. can do.
【００１４】[0014]
【発明の効果】導波管の中間部に高周波発生装置を取り
付け、導波管の両端部に設けた給電口から加熱室内に、
マイクロ波を供給する導波管の最適長さと加熱出力の関
係、及びマイクロ波放射アンテナの配設位置と加熱出力
の関係を明確にできたことにより、導波管形状の最適
化、及び小型化が図れるとともに、高周波発生装置で発
生したマイクロ波を効率よく加熱室に供給することがで
きる。According to the present invention, a high-frequency generator is attached to an intermediate portion of a waveguide, and a power supply port provided at both ends of the waveguide enters a heating chamber.
Optimization of the waveguide shape and miniaturization by clarifying the relationship between the optimal length of the waveguide that supplies microwaves and the heating output, and the relationship between the arrangement position of the microwave radiation antenna and the heating output. And microwaves generated by the high-frequency generator can be efficiently supplied to the heating chamber.
【図１】本発明実施例の加熱室に、高周波発生装置を取
り付けた外観斜視図である。FIG. 1 is an external perspective view in which a high-frequency generator is attached to a heating chamber according to an embodiment of the present invention.
【図２】本発明実施例の要部拡大断面図である。FIG. 2 is an enlarged sectional view of a main part of the embodiment of the present invention.
【図３】導波管全長とマイクロ波加熱出力の関係を示す
図である。FIG. 3 is a diagram showing the relationship between the total length of the waveguide and the microwave heating output.
【図４】高周波発生装置のアンテナ取り付け位置と、マ
イクロ波加熱出力の関係を示す図である。FIG. 4 is a diagram showing a relationship between an antenna mounting position of a high-frequency generator and a microwave heating output.
【図５】従来の技術を示す図である。FIG. 5 is a diagram showing a conventional technique.
１ 導波管 ３ 上給電口 ４ 下給電口 ５ 高周波発生装置 ６ 放射アンテナ DESCRIPTION OF SYMBOLS 1 Waveguide 3 Upper feed port 4 Lower feed port 5 High frequency generator 6 Radiation antenna
Claims (2)
を、導波管により給電口に導き、給電口から加熱室内に
マイクロ波を供給する高周波加熱装置において、高周波
発生装置の放射アンテナより相対向する二方向に、加熱
室と結合する給電口を有する導波管を設けるとともに、
この導波管の全長Ｌを Ｌ＝［Ｎλｇ／２］±λｇ／３２ （但しＮは０を含まない整数、λｇは導波管内波長）に
設定したこと特徴とする高周波加熱装置。1. A high-frequency heating device that guides a microwave generated by a high-frequency generator to a power supply port through a waveguide and supplies the microwave from the power supply port into a heating chamber. In two directions, while providing a waveguide having a power supply port coupled to the heating chamber,
A high-frequency heating apparatus wherein the total length L of the waveguide is set to L = [Nλg / 2] ± λg / 32 (where N is an integer not including 0 and λg is the wavelength in the waveguide).
Ｎλｇ／２］±λｇ／１６（但しＮは０を含まない整
数、λｇは導波管内波長）の位置に、高周波発生装置の
放射アンテナを配設してなる請求項１の高周波加熱装
置。2. [λg / 4 +
2. The high-frequency heating apparatus according to claim 1, wherein a radiation antenna of the high-frequency generator is disposed at a position of [Nλg / 2] ± λg / 16 (where N is an integer not including 0 and λg is a wavelength in the waveguide).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3528292A JP2725938B2 (en) | 1992-02-21 | 1992-02-21 | High frequency heating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3528292A JP2725938B2 (en) | 1992-02-21 | 1992-02-21 | High frequency heating equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05234670A JPH05234670A (en) | 1993-09-10 |
| JP2725938B2 true JP2725938B2 (en) | 1998-03-11 |
Family
ID=12437429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3528292A Expired - Fee Related JP2725938B2 (en) | 1992-02-21 | 1992-02-21 | High frequency heating equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2725938B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2820939B1 (en) * | 2001-02-13 | 2003-08-29 | Microondes Syst Sa | LAUNCHER WAVE GUIDE DEVICE FOR MICROWAVE ENCLOSURE |
| JP2004265616A (en) | 2003-02-05 | 2004-09-24 | Matsushita Electric Ind Co Ltd | Microwave heating equipment |
| JP6737109B2 (en) * | 2016-09-28 | 2020-08-05 | 富士通株式会社 | Filter regeneration device, filter clogging detection device, exhaust gas treatment device, and filter clogging determination method |
-
1992
- 1992-02-21 JP JP3528292A patent/JP2725938B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05234670A (en) | 1993-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102276267B1 (en) | Antenna and mobile terminal | |
| KR101495378B1 (en) | Microwave heating device | |
| US7804451B2 (en) | Wireless communication device having a reduced sar value | |
| CA1173512A (en) | Feed system for radiating elliptically polarized electromagnetic waves in microwave oven | |
| US4160145A (en) | Microwave applicator device | |
| JP3031898B2 (en) | microwave | |
| US3670134A (en) | Microwave oven no-load sensor | |
| JP3677017B2 (en) | Slot array antenna and plasma processing apparatus | |
| JP2004512661A (en) | Microwave power supply | |
| JPS60193292A (en) | Electronic range | |
| KR100545283B1 (en) | Plasma CD device | |
| JP2725938B2 (en) | High frequency heating equipment | |
| Goode et al. | A review of instrumentation used to generate microwave-induced plasmas | |
| US5008896A (en) | Gas laser having a discharge tube through which the gas flows in an axial direction | |
| Sanchez et al. | Accurate theory for a new leaky‐wave antenna for millimeter waves using nonradiative dielectric waveguide | |
| KR102721593B1 (en) | Microwave coupling/combination devices and associated microwave generators | |
| JP3046006B2 (en) | microwave | |
| JP2001016027A (en) | Stacked aperture antenna | |
| US5935479A (en) | Microwave oven with two microwave output apertures | |
| Sauvé et al. | Slotted waveguide field applicator for the generation of long uniform plasmas | |
| JP2573768B2 (en) | Leaky wave dielectric line | |
| JP7329736B2 (en) | High frequency heating device | |
| US11950350B2 (en) | Radio wave radiating device and oven having same | |
| JPH0324805B2 (en) | ||
| JPS58181291A (en) | High frequency heater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |