JPH0461474B2 - - Google Patents
Info
- Publication number
- JPH0461474B2 JPH0461474B2 JP24370984A JP24370984A JPH0461474B2 JP H0461474 B2 JPH0461474 B2 JP H0461474B2 JP 24370984 A JP24370984 A JP 24370984A JP 24370984 A JP24370984 A JP 24370984A JP H0461474 B2 JPH0461474 B2 JP H0461474B2
- Authority
- JP
- Japan
- Prior art keywords
- waveguide
- radio wave
- absorbing material
- conductor plate
- wave absorbing
- 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 29
- 239000011358 absorbing material Substances 0.000 claims description 27
- 239000004020 conductor Substances 0.000 claims description 27
- 230000000694 effects Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003466 welding 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、食品などの被加熱物を電波を用いて
高周波加熱するところの高周波加熱装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a high-frequency heating device for high-frequency heating of an object to be heated, such as food, using radio waves.
従来の技術
高周波加熱装置にその使用が特に認可されてい
る周波数帯域は、2450MHz帯あるいは915MHz帯
など国によつて多少異なるが、ある特定の帯域に
限られている。この帯域においては安全性が保証
されれば電波法の規則を受けない。しかしなが
ら、高周波発振器は一般に高調波成分を有し、基
本周波数（以下foと表記する）2450MHzで発振す
るマグネトロンの場合、4900MHz、7350MHz、
9800MHz、12250MHz等に比較的大きな電力成分
を有する。（以下、この成分を２fo、３fo、４fo、
５foと表記する）
これらの高周波成分は電波法の厳しい規制を受
けるが、高周波加熱装置の加熱室開閉扉の電波シ
ール機構などでこの規制に対応することは機構の
複雑化あるいは大形化を伴うことになり、装置の
実用性を考慮すると従来の電波シール機構の改良
では対応が困難である。このため加熱室内への入
射する高周波そのものの高調波成分を減衰させる
工夫が種々とられてきている。Prior Art The frequency bands specifically approved for use in high-frequency heating devices are limited to certain specific bands, such as the 2450 MHz band or the 915 MHz band, although this varies somewhat depending on the country. If safety is guaranteed in this band, it is not subject to the regulations of the Radio Law. However, high-frequency oscillators generally have harmonic components, and in the case of a magnetron that oscillates at a fundamental frequency (hereinafter referred to as fo) of 2450MHz, 4900MHz, 7350MHz,
It has relatively large power components at 9800MHz, 12250MHz, etc. (Hereinafter, this component will be referred to as 2fo, 3fo, 4fo,
These high-frequency components are subject to strict regulations under the Radio Law, but meeting these regulations with a radio wave seal mechanism for the heating chamber opening/closing door of a high-frequency heating device requires the complexity or size of the mechanism. Therefore, considering the practicality of the device, it is difficult to deal with this problem by improving the conventional radio wave seal mechanism. For this reason, various efforts have been made to attenuate the harmonic components of the high frequency itself that enters the heating chamber.
従来のこの種の高周波加熱装置は、第６図に示
すように、導波管１の内部に長さの異なる導体棒
２ａ〜２ｃを突出させてバンド・パス・フイルタ
を構成して、加熱室３内にfo以外の高調波を含む
雑音周波数の入射を阻止するようになつていた。
（例えば、実公昭51−14514号公報）。 As shown in FIG. 6, a conventional high-frequency heating device of this type has conductor rods 2a to 2c of different lengths protruding inside a waveguide 1 to form a band pass filter, and a heating chamber is constructed. It was designed to block the incidence of noise frequencies including harmonics other than fo within 3.
(For example, Utility Model Publication No. 51-14514).
また、第７図に示すように導波管の管軸方向に
幅を有する導体板４ａ〜４ｃをfoの導波管管内波
長をλｇとしたときほゞλｇ／２の間隔で配設す
る構成により、各導体板と各導体板の間隔により
立体共振回路が形成され、fo以外の周波数の伝送
を阻止するようになつている。（特公昭59−16714
号公報）。 Further, as shown in FIG. 7, conductor plates 4a to 4c having widths in the axial direction of the waveguide are arranged at intervals of approximately λg/2 when the wavelength in the waveguide of fo is λg. Accordingly, a three-dimensional resonant circuit is formed by the spacing between each conductor plate and the transmission of frequencies other than fo is blocked. (Tokuko Showa 59-16714
Publication No.).
発明が解決しようとする問題点
しかしながら上記のような導体棒を導波管内に
突出させる構成では、突出長によつて阻止できる
周波数が決定され、かつその周波数帯域は非常に
狭い。この帯域を広く取るには、導体棒の数を増
せばよいが、各高調波に対して実施することは困
難である。Problems to be Solved by the Invention However, in the configuration in which the conductor rod protrudes into the waveguide as described above, the frequency that can be blocked is determined by the length of the protrusion, and the frequency band is very narrow. In order to widen this band, it is possible to increase the number of conductor rods, but this is difficult to do for each harmonic.
また、foに共振する立体共振回路を形成させる
構成では、高調波成分をマグネトロン側へ反射さ
せ、理想的にfoのみを加熱室内に伝送させたとし
ても、高調波成分がマグネトロン内部で消滅する
ことはない。このため、この反射させた高調波に
よりマグネトロンが異常動作を起こす危険性があ
る。 In addition, in a configuration that forms a three-dimensional resonance circuit that resonates with fo, harmonic components are reflected to the magnetron side, and even if ideally only fo is transmitted into the heating chamber, the harmonic components will disappear inside the magnetron. There isn't. Therefore, there is a risk that the magnetron will malfunction due to the reflected harmonics.
本発明はかかる従来の問題を解消するものであ
り、簡単な構成にて基本波以外の各高調波成分を
減衰消滅させて装置の高調波に対する電波漏洩防
止をより完全にすることを目的とする。 The present invention solves such conventional problems, and aims to attenuate and annihilate each harmonic component other than the fundamental wave with a simple configuration to more completely prevent radio wave leakage from harmonics of the device. .
問題点を解決するための手段
上記問題点を解決するために本発明の高周波加
熱装置は、高周波発振器と、被加熱物を収容する
加熱室と、前記高周波発振器が発生する電波を
TE01モードでもつて前記加熱室に伝送する導波
管と、前記導波管内の導波管Ｈ面に設けられ前記
高周波発振器の高調波に対して所望の減衰特性を
有する電波吸収材と、前記電波吸収材を覆うとと
もに前記導波管管軸方向の中央部を中心とする前
記導波管のＨ面の幅の略1/3の領域内に前記高周
波発振器の少なくとも基本波を遮蔽する手段を有
しかつ前記略1/3の領域外に前記高調波を通過さ
せる手段を有する導体板とを備えている。Means for Solving the Problems In order to solve the above problems, the high-frequency heating device of the present invention includes a high-frequency oscillator, a heating chamber that accommodates an object to be heated, and a radio wave generated by the high-frequency oscillator.
a waveguide that transmits to the heating chamber even in TE 01 mode; a radio wave absorbing material provided on the waveguide H surface in the waveguide and having desired attenuation characteristics for harmonics of the high frequency oscillator; A means for covering the radio wave absorbing material and shielding at least the fundamental wave of the high frequency oscillator is provided within a region approximately 1/3 of the width of the H plane of the waveguide centered at the center in the axial direction of the waveguide. and a conductor plate having means for passing the harmonics outside the approximately ⅓ area.
また、少なくとも基本波を遮蔽する手段および
高調波を通過させる手段は導体板に設けた開孔と
している。さらには、少なくとも基本波を遮断す
る手段は導体板としている。 Furthermore, at least the means for shielding the fundamental wave and the means for passing the harmonics are apertures provided in the conductor plate. Furthermore, the means for blocking at least the fundamental wave is a conductive plate.
さらにまた、導波管Ｈ面に対向する導体板の面
と電波吸収材との間において少なくとも導波管Ｈ
面の幅の略1/3の導体板の面と電波吸収材との間
に空〓部が設けられている。 Furthermore, between the surface of the conductor plate facing the waveguide H surface and the radio wave absorbing material, at least the waveguide
A space is provided between the surface of the conductive plate and the radio wave absorbing material, which is approximately 1/3 of the width of the surface.
作 用
本発明は、上記した構成によつて、電波吸収材
は基本波に対してほゞその存在が無視され、各高
調波に対しては、その存在のために高調波成分が
吸収され、その結果加熱室内へ入射される高調波
成分の減少が達成されることになる。Effects According to the present invention, with the above-described configuration, the presence of the radio wave absorbing material is almost ignored for the fundamental wave, and for each harmonic, the harmonic component is absorbed due to its presence. As a result, the harmonic components entering the heating chamber can be reduced.
実施例
以下、本発明の実施例を添付図面に基づいて説
明する。Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.
第１図において、５は高周波発振器であるマグ
ネトロン、６は被加熱物を収容する加熱室、７は
加熱室前面に設けられた開閉扉、８はマグネトロ
ンが発生する電波をTE01モードでもつて加熱室
に伝送する導波管、９は導波管Ｈ面に配設された
電波吸収材、１０はこの電波吸収材をカバーする
導体板であり、所定部に開孔１１を有する。 In Figure 1, 5 is a magnetron which is a high frequency oscillator, 6 is a heating chamber that houses the object to be heated, 7 is an opening/closing door provided at the front of the heating chamber, and 8 is a heating device that uses radio waves generated by the magnetron in TE 01 mode. A waveguide for transmitting data into the chamber, 9 is a radio wave absorbing material disposed on the H surface of the waveguide, and 10 is a conductor plate covering this radio wave absorbing material, and has an opening 11 at a predetermined portion.
第２図は、第１図のＡ方向矢視図、第３図は第
２図のＢ−B′断面矢視図である。図中、第１図
第２図と同一部材は同一番号で示す。 2 is a view taken in the direction of arrow A in FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB' in FIG. 2. In the drawings, the same members as those in FIGS. 1, 2, and 2 are indicated by the same numbers.
これらの図において、導体板１０は、導波管壁
に接するフランジ面１２，１３，１４，１５を有
し、該フランジ面１２，１３は、導波管Ｈ面１６
に、またフランジ面１４，１５は、導波管Ｅ面１
７に夫々スポツト溶接により取付けられる。また
導体板１０には、所望の開孔１８，１９が配設さ
れている。これらの開孔は、導波管管軸方向の中
央部（図中−点破線ｌ）を中心とする導波管Ｈ面
１６の幅の略1/3の面２０内に設けられた高調波
発振器５の少なくとも基本波を遮蔽する手段であ
る開孔１９と上記略1/3の面以外に設けられた高
調波発振器５の高調波を通過させる手段である開
孔１８とに区分される。開孔１９（第２図内で丸
孔で示す）は開孔１８（第２図内で角孔で示す）
よりも小さい孔とし、面２０の開孔率は面２０以
外の面の開孔率よりも小さい構成としている。 In these figures, the conductor plate 10 has flange surfaces 12, 13, 14, 15 in contact with the waveguide wall, and the flange surfaces 12, 13 are in contact with the waveguide H surface 16.
In addition, the flange surfaces 14 and 15 are connected to the waveguide E surface 1.
7 by spot welding. Furthermore, desired openings 18 and 19 are provided in the conductor plate 10. These openings are provided in a surface 20 that is approximately 1/3 of the width of the waveguide H surface 16 centered at the center in the axial direction of the waveguide (indicated by dotted line l in the figure). It is divided into an aperture 19, which is a means for shielding at least the fundamental wave of the oscillator 5, and an aperture 18, which is a means for passing the harmonics of the harmonic oscillator 5, which is provided on a surface other than approximately ⅓ of the surface. Aperture 19 (shown as a round hole in FIG. 2) is connected to aperture 18 (shown as a square hole in FIG. 2)
The pores are smaller than the pores, and the porosity of surface 20 is smaller than the porosity of surfaces other than surface 20.
また、導体板１０のフランジ面１２，１３に至
る側面も上述の開孔の配し方法と同様である。第
３図において、導波管Ｈ面の幅の略1/3に相当す
る領域２１以外の導体板側面には、そのほゞ全面
に開孔（図中角孔２２で示す）を、また領域２１
内の面２３上には開孔を有さない構成例を示す。 Furthermore, the side surfaces of the conductor plate 10 that reach the flange surfaces 12 and 13 are arranged in the same manner as the above-described arrangement of the openings. In Fig. 3, holes (indicated by square holes 22 in the figure) are formed on almost the entire surface of the side surface of the conductor plate other than the area 21 corresponding to approximately 1/3 of the width of the H-plane of the waveguide. 21
A configuration example in which no openings are provided on the inner surface 23 is shown.
上記構成において、導体板１０の側面図は、面
２３の存在により、その側面開口から高周波発振
器の発生する電波の基本波が入射するのを遮蔽す
るように作用する。また、導波管Ｈ面に平行な導
体板面上に配された開孔は、基本板を除く各高調
波を電波吸収材が配された方向に漏洩させる。さ
らに導波管Ｈ面の幅の略1/3に相当する面内の開
孔は、たとえば第３高調波まで電波シール機構と
して作用する。 In the above configuration, the side view of the conductor plate 10 shows that the presence of the surface 23 acts to shield the fundamental wave of radio waves generated by the high frequency oscillator from entering from the side opening thereof. In addition, the holes arranged on the conductor plate surface parallel to the waveguide H-plane cause each harmonic wave other than the basic plate to leak in the direction in which the radio wave absorbing material is arranged. Furthermore, the in-plane opening corresponding to approximately 1/3 of the width of the waveguide H-plane acts as a radio wave sealing mechanism up to, for example, the third harmonic.
このような構成により、導波管内に設けた電波
吸収材は、基本波成分による部材の焼損をするこ
となく高調波成分を吸収あるいは減衰させ、高周
波加熱装置の高調波電波漏洩防止をより完全に行
ない他の電波利用機器との電波障害問題を未然に
防止する効果がある。 With this configuration, the radio wave absorbing material provided in the waveguide absorbs or attenuates harmonic components without burning out the components due to the fundamental wave component, and more completely prevents harmonic radio wave leakage from high frequency heating equipment. This has the effect of preventing radio wave interference problems with other radio wave-using devices.
次に本発明の他の実施例を第４図を用いて説明
する。第４図は第３図と同じ方向から見た構成図
である。同図において前記実施例と相違する点は
電波吸収材９と導体板１０との間に空〓部２４を
設けた構成としたことにある。この空〓部は、少
なくとも導波管のＨ面の幅の略1/3に相当する部
分に設ける。この空〓部は断熱部として作用し、
導体板の発熱により、電波吸収材の吸収特性劣化
あるいは導体板の発熱による電波吸収材の焼損へ
の加勢を未然に防止する効果がある。 Next, another embodiment of the present invention will be described using FIG. 4. FIG. 4 is a configuration diagram seen from the same direction as FIG. 3. In the figure, the difference from the previous embodiment is that a hollow portion 24 is provided between the radio wave absorbing material 9 and the conductive plate 10. This hollow portion is provided at least in a portion corresponding to approximately ⅓ of the width of the H-plane of the waveguide. This empty space acts as a heat insulator,
This has the effect of preventing deterioration of the absorption characteristics of the radio wave absorbing material due to the heat generated by the conductor plate, or preventing the radio wave absorbing material from being burnt out due to the heat generated by the conductor plate.
なお、上述の導波管Ｈ面の幅の略1/3に相当す
る部分には、開孔を配さない構成としてもよい。 Note that a configuration may be adopted in which no opening is provided in a portion corresponding to approximately ⅓ of the width of the above-mentioned waveguide H surface.
第５図に本発明による１構成例の特性を示す。 FIG. 5 shows the characteristics of one configuration example according to the present invention.
同図は、Ｈ面幅92mm、Ｅ面高さ32mmの導波管内
の基本波における強電界位置を中心に幅92mm、長
さ70mm、厚み1.5mmのIC−H005、TDK製を電波
吸収材として、空〓部すきま10mm、空〓部幅30
mm、開孔径４mmの千鳥格子穴を開孔率約40％で配
した導体板を電波吸収材のカバーとして配設した
高周波加熱装置の電波漏洩量を導波管内に何も配
設しない装置との相対値として表わしている。同
図特性より、本発明の構成は、第３高調波より高
い周波数において特に著しい電波漏洩防止効果が
あることが実証される。 The figure shows IC-H005 with a width of 92 mm, length of 70 mm, and thickness of 1.5 mm, made by TDK, as a radio wave absorbing material, centered on the strong electric field position of the fundamental wave in a waveguide with a width of 92 mm on the H plane and a height of 32 mm on the E plane. , empty part clearance 10mm, empty part width 30
The amount of radio wave leakage from a high-frequency heating device in which a conductor plate with houndstooth holes with an aperture diameter of 4 mm and an aperture ratio of approximately 40% is used as a cover for a radio wave absorbing material. It is expressed as a relative value. The characteristics shown in the figure demonstrate that the configuration of the present invention has a particularly significant radio wave leakage prevention effect at frequencies higher than the third harmonic.
なお、電波吸収材は導波管Ｈ面の幅方向に全面
配設する必要はなく、たとえば導波管管軸方向の
中央部を中心とするＨ面の幅の略1/3に相当する
面以外に電波吸収材を配設してもよい。 It should be noted that the radio wave absorbing material does not need to be disposed all over the width direction of the waveguide H surface; for example, it is necessary to arrange the radio wave absorbing material on a surface corresponding to approximately 1/3 of the width of the H surface centered on the central part in the axial direction of the waveguide. In addition to this, a radio wave absorbing material may be provided.
発明の効果
以上のように本発明の高周波加熱装置によれば
次の効果が得られる。Effects of the Invention As described above, the high frequency heating device of the present invention provides the following effects.
(1) 電波吸収材を電波伝送路である導波管内に用
いることにより高調波成分を吸収あるいは減衰
させるため反射する高調波により高周波発振器
が異常動作を起こす危険性を防止するとともに
装置の高調波に対する電波漏洩防止をより完全
に行なうことができる。(1) By using a radio wave absorbing material in the waveguide, which is a radio wave transmission path, it absorbs or attenuates harmonic components, thereby preventing the risk of abnormal operation of the high frequency oscillator due to reflected harmonics, and also reducing the harmonics of the equipment. Radio wave leakage can be more completely prevented.
(2) 電波吸収材を覆う導体板の導波管管軸方向の
中央部を中心とする導波管Ｈ面の幅の略1/3の
領域とそれ以外の領域との導体板面に設ける開
孔の構成を工夫することより、所望の高調波成
分の伝送を効果的に抑制することができる。(2) Provided on the conductor plate surface between approximately 1/3 of the width of the waveguide H surface centered on the center of the conductor plate covering the radio wave absorbing material in the waveguide axis direction, and other areas. By devising the configuration of the apertures, transmission of desired harmonic components can be effectively suppressed.
(3) 電波吸収材をカバーする導体板の導波管管軸
方向の中央部を中心とする導波管Ｈ面の幅の略
１／３に相当する板面と電波吸収材との間に空〓
部を設けることにより、導体板の高周波による
損失により生ずる昇温を断熱することができ、
電波吸収材の特性劣下あるいは焼損を未然に防
止することができる。(3) Between the conductor plate covering the radio wave absorbing material and the radio wave absorbing material, the plate surface corresponds to approximately 1/3 of the width of the H-plane of the waveguide, centered on the center of the waveguide in the axial direction. Sky =
By providing a section, it is possible to insulate the temperature rise caused by loss due to high frequency of the conductor plate,
It is possible to prevent property deterioration or burnout of the radio wave absorbing material.
(4) 電波吸収材を用いることにより、電波吸収あ
るいは減衰の周波数帯域を広帯域にすることが
できる。(4) By using a radio wave absorbing material, it is possible to widen the frequency band of radio wave absorption or attenuation.
第１図は本発明の一実施例を示す高周波加熱装
置の構成図、第２図は第１図のＡ方向矢視図、第
３図は第２図のＢ−B′線断面図、第４図は本発
明の他の実施例を示す断面図、第５図は本発明の
一実施例の装置の特性図、第６図、第７図は従来
の高周波加熱装置の断面図である。
５……高周波発振器、６……加熱室、８……導
波管、９……電波吸収材、１０……導体板、１
１，１８，１９，２２……開孔、１６……導波管
Ｈ面、２０……Ｈ面の幅の略1/3に相当する面、
２４……空〓部、ｌ……導波管管軸方向の中央
部。
Fig. 1 is a block diagram of a high-frequency heating device showing an embodiment of the present invention, Fig. 2 is a view taken in the direction of arrow A in Fig. 1, Fig. 3 is a sectional view taken along the line B-B' in Fig. FIG. 4 is a sectional view showing another embodiment of the present invention, FIG. 5 is a characteristic diagram of a device according to an embodiment of the present invention, and FIGS. 6 and 7 are sectional views of a conventional high-frequency heating device. 5... High frequency oscillator, 6... Heating chamber, 8... Waveguide, 9... Radio wave absorbing material, 10... Conductor plate, 1
1, 18, 19, 22...opening hole, 16...waveguide H surface, 20...surface corresponding to approximately 1/3 of the width of the H surface,
24...Empty part, l...Central part in the axial direction of the waveguide.
Claims (1)
と、前記高周波発振器が発生する電波をTE01モ
ードでもつて前記加熱室に伝送する導波管と、前
記導波管内の導波管Ｈ面に設けられ前記高周波発
振器の高調波に対して所望の減衰特性を有する電
波吸収材と、前記電波吸収材を覆うとともに前記
導波管管軸方向の中央部を中心とする前記導波管
のＨ面の幅の略1/3の領域内に前記高周波発振器
の少なくとも基本波を遮蔽する手段を有しかつ前
記略1/3の領域以外に前記高調波を通過させる手
段を有する導体板とを備えた高周波加熱装置。 ２ 少なくとも基本波を遮蔽する手段および高調
波を通過させる手段は導体板に設けた開孔とした
特許請求の範囲第１項記載の高周波加熱装置。 ３ 少なくとも基本波を遮蔽する手段は導体板と
した特許請求の範囲第１項記載の高周波加熱装
置。 ４ 導波管Ｈ面に対向する導体板の面と電波吸収
材との間において少なくとも導波管Ｈ面の幅の略
１／３の導体板の面と電波吸収材との間に空〓部が
設けられ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 high-frequency oscillator, a heating chamber that accommodates an object to be heated, a waveguide that transmits radio waves generated by the high-frequency oscillator to the heating chamber in TE 01 mode, and a a radio wave absorbing material provided on the H surface of the waveguide and having a desired attenuation characteristic for harmonics of the high frequency oscillator; A means for shielding at least the fundamental wave of the high-frequency oscillator is provided in a region approximately 1/3 of the width of the H-plane of the waveguide, and a means for passing the harmonic wave is provided in a region other than the approximately 1/3 region. A high-frequency heating device equipped with a conductor plate. 2. The high-frequency heating device according to claim 1, wherein at least the means for shielding fundamental waves and the means for passing harmonics are holes provided in the conductor plate. 3. The high frequency heating device according to claim 1, wherein the means for shielding at least the fundamental wave is a conductive plate. 4. Between the surface of the conductor plate facing the H surface of the waveguide and the radio wave absorbing material, there is an air space between the surface of the conductor plate and the radio wave absorbing material that is at least approximately 1/3 of the width of the H surface of the waveguide. The high-frequency heating device according to claim 1, wherein the high-frequency heating device is provided with:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24370984A JPS61121286A (en) | 1984-11-19 | 1984-11-19 | High frequency heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24370984A JPS61121286A (en) | 1984-11-19 | 1984-11-19 | High frequency heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61121286A JPS61121286A (en) | 1986-06-09 |
| JPH0461474B2 true JPH0461474B2 (en) | 1992-09-30 |
Family
ID=17107813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24370984A Granted JPS61121286A (en) | 1984-11-19 | 1984-11-19 | High frequency heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61121286A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6595117B1 (en) * | 1999-08-04 | 2003-07-22 | The Frymaster Corporation | High speed variable size toaster |
-
1984
- 1984-11-19 JP JP24370984A patent/JPS61121286A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61121286A (en) | 1986-06-09 |
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