JPS6259435B2 - - Google Patents
Info
- Publication number
- JPS6259435B2 JPS6259435B2 JP836983A JP836983A JPS6259435B2 JP S6259435 B2 JPS6259435 B2 JP S6259435B2 JP 836983 A JP836983 A JP 836983A JP 836983 A JP836983 A JP 836983A JP S6259435 B2 JPS6259435 B2 JP S6259435B2
- Authority
- JP
- Japan
- Prior art keywords
- heating chamber
- waveguide
- frequency
- opening
- electric field
- 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
- 230000005684 electric field Effects 0.000 claims description 16
- 238000010411 cooking Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Constitution Of High-Frequency Heating (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は導波管と加熱室とを開口によつて結合
する高周波加熱装置の開口の位置および形状に関
するもので、均一でしかも負荷変動に対しても安
定した分布性能を有する高周波加熱装置を提供す
るものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to the position and shape of an opening in a high-frequency heating device that connects a waveguide and a heating chamber through an opening, which is uniform and stable against load fluctuations. The present invention also provides a high frequency heating device having stable distribution performance.
従来例の構成とその問題点
従来より、導波管と加熱室とを開口により結合
する高周波加熱装置は第１図のような構成で、高
周波発振器であるマグネトロン１からの高周波電
磁波を導波管２を介して開口により加熱室３と結
合すると電界の方向が開口４で水平方向に変化す
るため、加熱室３内では垂直電界を有する定圧波
モードが励振できなかつた。しかし、高周波加熱
装置の加熱室３に主に垂直方向の電界成分を有す
る定在波モードを有することは種々の負荷に対し
て安定して定在波モードが励磁できるため、食品
を加熱する高周波加熱調理器の分布を良くするた
めには必要な項目である。Conventional configuration and its problems Conventionally, a high-frequency heating device that connects a waveguide and a heating chamber through an opening has a configuration as shown in Figure 1, in which high-frequency electromagnetic waves from a magnetron 1, which is a high-frequency oscillator, are connected to a waveguide. When the heating chamber 3 is coupled to the heating chamber 3 through the opening 2, the direction of the electric field changes horizontally at the opening 4, so a constant pressure wave mode having a vertical electric field cannot be excited in the heating chamber 3. However, the fact that the heating chamber 3 of the high-frequency heating device has a standing wave mode with an electric field component mainly in the vertical direction means that the standing wave mode can be stably excited under various loads. This is a necessary item to improve the distribution of heat in the cooking device.
そこで第２図のように導波管２と加熱室３とを
アンテナ５で結合すると加熱室３に垂直電界を有
する定在波モードを励振することは可能となる
が、加熱室３の有効容積が小さくなるばかりでな
く、アンテナ５に食品カス等が付着すると高周波
電界で火花放電が生じることもあり、一般的には
実用化されていない。 Therefore, if the waveguide 2 and the heating chamber 3 are coupled with the antenna 5 as shown in FIG. 2, it becomes possible to excite a standing wave mode with a vertical electric field in the heating chamber 3, but the effective volume of the heating chamber 3 Not only does this reduce the size of antenna 5, but if food particles or the like adhere to antenna 5, spark discharge may occur in the high-frequency electric field, so it is not generally put into practical use.
発明の目的
本発明は前記従来の欠点を解消するもので、導
波管の開口により加熱室と結合する構成におい
て、加熱室内に垂直電界を持つ定在波モードを励
振させて負荷の変動に対しても安定した分布性能
を有し、前記定在波モードによつて負荷を加熱室
中央に配置しても、負荷の端部と中央部が同等に
加熱できる高周波加熱装置を提供することを目的
とする。Purpose of the Invention The present invention solves the above-mentioned drawbacks of the conventional technology, and is designed to respond to load fluctuations by exciting a standing wave mode with a vertical electric field in the heating chamber in a configuration that is coupled to the heating chamber through the opening of the waveguide. It is an object of the present invention to provide a high-frequency heating device that has stable distribution performance even when heating the heating chamber, and can equally heat the ends and the center of the load even if the load is placed in the center of the heating chamber using the standing wave mode. shall be.
発明の構成
上記目的を達成するため、本発明は加熱室と高
周波発振器とを導波管で結合し、導波管と加熱室
とは開口で結合する高周波加熱装置において、前
記導波管を加熱室中央部へ向かわせ、前記開口の
隣接する二辺のみを前記導波管の終端部と側端部
と一致させ、更に前記開口の高周波の進行方向の
寸法を前記導波管の幅と同等以上にし、その上、
前記加熱室は高周波電磁波の定在波モードが生じ
る寸法とし、前記定在波モードの電界の方向およ
び位置を前記導波管の電界の方向および位置と一
致させた高周波加熱装置であり、加熱室内の高周
波分布の均一化を図り、有効容積の多い加熱室を
提供できるものである。Structure of the Invention In order to achieve the above object, the present invention provides a high-frequency heating device in which a heating chamber and a high-frequency oscillator are coupled through a waveguide, and the waveguide and the heating chamber are coupled through an opening, in which the waveguide is heated. toward the center of the chamber, only two adjacent sides of the opening are aligned with the terminal end and side end of the waveguide, and the dimension of the opening in the direction of propagation of high frequency waves is equal to the width of the waveguide. above, and on top of that,
The heating chamber is a high-frequency heating device having dimensions in which a standing wave mode of high-frequency electromagnetic waves occurs, and the direction and position of the electric field of the standing wave mode are made to match the direction and position of the electric field of the waveguide. This makes it possible to make the high frequency distribution uniform and provide a heating chamber with a large effective volume.
実施例の説明
以下、本発明の一実施例について、図面に基づ
き説明する。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
第３図において、加熱室の開口の前部には扉６
が開閉自在に設けられ、タイマー７を設定して、
作動釦８を押すことによつて高周波加熱を行なう
ことができる。 In Figure 3, there is a door 6 in front of the opening of the heating chamber.
is provided so that it can be opened and closed freely, and by setting the timer 7,
High frequency heating can be performed by pressing the operation button 8.
第４図において、加熱室３底面にはターンテー
ブル９が設けられており、被加熱物を受皿１０に
乗せて高周波加熱を行なう。また、ターンテーブ
ル９には永久磁石１１が取付けられており、加熱
室３下面に設けられたプーリー１２がモータ等で
回転し、プーリー１２に取付けられた永久磁石１
１とターンテーブル９に取付けられた永久磁石１
１との磁気によつて加熱室内の被加熱物を回転さ
せるようになつている。 In FIG. 4, a turntable 9 is provided at the bottom of the heating chamber 3, and the object to be heated is placed on a saucer 10 and subjected to high-frequency heating. Further, a permanent magnet 11 is attached to the turntable 9, and a pulley 12 provided on the bottom surface of the heating chamber 3 is rotated by a motor or the like, and the permanent magnet 1 attached to the pulley 12 is rotated by a motor or the like.
1 and a permanent magnet 1 attached to the turntable 9
The object to be heated in the heating chamber is rotated by the magnetism between the heating chamber and the heating chamber.
また、加熱室３の上部に導波管２と結合する開
口部１７を設けており、高周波発振器であるマグ
ネトロン１からの高周波電磁波はアンテナ１５よ
り導波管２を伝搬し、加熱室３の上部の開口部１
７から加熱室３内に供給される。そして前記開口
部１７は加熱室３内の熱気がマグネトロン１に伝
わらないように低損失誘電体で作られた封口板１
８で覆われている。開口部１７は導波管２の終端
部１６と一致しており、さらに、前記開口部１７
は導波管２の高周波電磁波の進行方向の寸法を導
波管幅（通常は定在波の半波長以上）と同等以上
に形成しているので、導波管２内の電界１３と同
じく垂直方向に加熱室３内を励振することがで
き、ターンテーブルと組み合わせることにより加
熱バランスのよい均一加熱が可能となる。 Furthermore, an opening 17 is provided in the upper part of the heating chamber 3 to connect with the waveguide 2, and the high-frequency electromagnetic waves from the magnetron 1, which is a high-frequency oscillator, are propagated through the waveguide 2 from the antenna 15, and opening 1
7 into the heating chamber 3. The opening 17 is a sealing plate 1 made of a low-loss dielectric so that the hot air in the heating chamber 3 is not transmitted to the magnetron 1.
Covered by 8. The opening 17 coincides with the terminal end 16 of the waveguide 2, and furthermore, the opening 17
is formed so that the dimension of the waveguide 2 in the direction of propagation of high-frequency electromagnetic waves is equal to or larger than the waveguide width (usually more than half the wavelength of the standing wave). The inside of the heating chamber 3 can be excited in this direction, and when combined with a turntable, uniform heating with good heating balance is possible.
更に、加熱室３の寸法を１／λ２＝（ｍ／2a）2
＋（ｎ／2b）2＋（ｐ／2c）2の式を満足するように選
んであり、ここでａ、ｂ、ｃは加熱室３の横、
縦、高さで、ｍ、ｎ、ｐはそれぞれの方向に発生
する定在波モードの山の数で、λは高周波電磁波
の波長を示す。 Furthermore, the dimensions of the heating chamber 3 are 1/λ 2 = (m/2a) 2
+ (n/2b) 2 + (p/2c) 2 is selected to satisfy the formula 2, where a, b, and c are on the side of heating chamber 3,
In terms of length and height, m, n, and p are the number of peaks of standing wave modes generated in each direction, and λ indicates the wavelength of high-frequency electromagnetic waves.
本発明の場合はｍ＝３、ｎ＝４、ｐ＝０を入れ
ると、ｃの寸法は任意で、ａとｂとの関係は第５
図のようになり、３、４、０のモードの線上のど
こでも良いが使用勝手などを考慮して、本発明は
ａ＝300mm、ｂ＝308mm程度に選んでいる。なお、
λは122mm程度である。 In the case of the present invention, if m = 3, n = 4, and p = 0, the dimension of c is arbitrary, and the relationship between a and b is the fifth
As shown in the figure, any position on the line of modes 3, 4, and 0 is acceptable, but in consideration of ease of use, in the present invention, a=300 mm and b=308 mm are selected. In addition,
λ is approximately 122 mm.
第６図は３・４・０モードの電界パターンと加
熱パターンを模式的に表わした平面図である。す
なわち電界は垂直方向に発生し、横方向（ａ寸
法）には電界１３の変化つまり電界１３の山が３
つ生じ、縦方向には４つの電界１３の山が生じて
いることを示している。また、お互いの山の隣は
電界１３の方向が異なることをと○ぐ FIG. 6 is a plan view schematically showing the electric field pattern and heating pattern of the 3.4.0 mode. In other words, the electric field is generated in the vertical direction, and in the horizontal direction (dimension a), the change in the electric field 13, that is, the peak of the electric field 13 is 3.
This shows that four peaks of the electric field 13 are generated in the vertical direction. Also, note that the directions of the electric field 13 are different for the mountains next to each other.
Claims (1)
る高周波発振器とを備え、前記加熱室と前記高周
波発振器とを導波管により結合し、前記加熱室と
前記導波管は開口により結合する構成とし、前記
導波管を前記加熱室中央部へ向かわせ、前記開口
の隣接する二辺のみを前記導波管の終端部と側端
部と一致させ、さらに前記開口の高周波の進行方
向の寸法を前記導波管の幅と同等以上にした高周
波加熱装置。 ２ 前記加熱室は前記高周波電磁波の定在波モー
ドが生じる方法とし、前記定在波モードの電界の
方向および位置を、前記導波管の電界の方向およ
び位置と一致させる構成とした特許請求の範囲第
１項記載の高周波加熱装置。[Scope of Claims] 1. A heating chamber that stores an object to be heated and a high-frequency oscillator that generates high-frequency waves, the heating chamber and the high-frequency oscillator are coupled by a waveguide, and the heating chamber and the waveguide are connected by an opening, the waveguide is directed toward the center of the heating chamber, only two adjacent sides of the opening are aligned with the terminal end and side end of the waveguide, and A high-frequency heating device in which the dimension in the direction of propagation of high-frequency waves is equal to or greater than the width of the waveguide. 2. The heating chamber is configured to generate a standing wave mode of the high-frequency electromagnetic wave, and the direction and position of the electric field of the standing wave mode are made to match the direction and position of the electric field of the waveguide. The high-frequency heating device according to scope 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP836983A JPS59134592A (en) | 1983-01-20 | 1983-01-20 | High frequency heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP836983A JPS59134592A (en) | 1983-01-20 | 1983-01-20 | High frequency heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59134592A JPS59134592A (en) | 1984-08-02 |
| JPS6259435B2 true JPS6259435B2 (en) | 1987-12-10 |
Family
ID=11691315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP836983A Granted JPS59134592A (en) | 1983-01-20 | 1983-01-20 | High frequency heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59134592A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013187194A (en) * | 2012-03-06 | 2013-09-19 | Samsung Corning Precision Materials Co Ltd | High frequency heating apparatus |
-
1983
- 1983-01-20 JP JP836983A patent/JPS59134592A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013187194A (en) * | 2012-03-06 | 2013-09-19 | Samsung Corning Precision Materials Co Ltd | High frequency heating apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59134592A (en) | 1984-08-02 |
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