JPS6361757B2 - - Google Patents
Info
- Publication number
- JPS6361757B2 JPS6361757B2 JP6386484A JP6386484A JPS6361757B2 JP S6361757 B2 JPS6361757 B2 JP S6361757B2 JP 6386484 A JP6386484 A JP 6386484A JP 6386484 A JP6386484 A JP 6386484A JP S6361757 B2 JPS6361757 B2 JP S6361757B2
- Authority
- JP
- Japan
- Prior art keywords
- door
- maze
- radio
- cover
- rear plate
- 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
- 239000002184 metal Substances 0.000 claims description 27
- 238000010438 heat treatment Methods 0.000 claims description 17
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 239000003989 dielectric material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 4
- 239000011358 absorbing material Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Constitution Of High-Frequency Heating (AREA)
Description
【発明の詳細な説明】
本発明は高周波加熱装置の加熱室の入口に開閉
自在に設けたドアの電波漏洩防止構造の改良に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the radio wave leakage prevention structure of a door provided at the entrance of a heating chamber of a high-frequency heating device so as to be openable and closable.
高周波加熱装置のドア周縁に電波迷路を設け、
この電波迷路（チヨーク）を構成する仕切り板に
スリツトを設ける提案が実開昭54−130642にある
が、この従来例ではスリツト（幅２mm±0.5mm、
ピツチ10mm以下）だけでは電波シール効果が十分
とはいえず、電波吸収材を上記仕切り板の外壁に
追加している。そのため部品点数が増え、構造が
複雑となり、組立性が悪く、かつドア外形寸法も
大きくなり、スペースフアクターの悪い高周波加
熱装置になるという欠点があつた。 A radio maze is installed around the door of the high-frequency heating device,
There is a proposal in Utility Model Application Publication No. 54-130642 to provide slits in the partition plates that make up this radio maze (width 2 mm ± 0.5 mm,
Since it cannot be said that the radio wave sealing effect is sufficient only with a pitch of 10 mm or less, radio wave absorbing material is added to the outer wall of the partition plate. As a result, the number of parts increases, the structure becomes complicated, assembly is difficult, and the outer dimensions of the door become large, resulting in a high-frequency heating device with a poor space factor.
そこで、本発明は電波迷路の周壁に従来例のよ
うなスリツト（細隙）を設けるというよりはむし
ろ、電波迷路の周壁の一部を十分に間隔をあけた
複数の金属片から構成し、これらの金属片に特定
の条件を与えることにより、漏洩電波を電波迷路
内へ能率よく導びき入れる電波的に互いに独立し
た整合素子として作用させるようにしたもので、
その目的は簡単な構造で組立性が良く、ドア外形
寸法が小さく、スペースフアクターが良く、かつ
耐久性のある高周波加熱装置を得るにある。 Therefore, rather than providing a slit (slit) in the peripheral wall of the radio maze as in the conventional example, the present invention constructs a part of the peripheral wall of the radio maze from a plurality of metal pieces spaced sufficiently apart. By applying specific conditions to the metal pieces, they are made to act as radio-independent matching elements that efficiently guide leaked radio waves into the radio maze.
The purpose is to obtain a high-frequency heating device that has a simple structure, good assemblability, small door external dimensions, good space factor, and durability.
次に本発明の高周波加熱装置の構成および作用
を図面とともに説明する。 Next, the structure and operation of the high frequency heating device of the present invention will be explained with reference to the drawings.
第１図は本発明の高周波加熱装置の一実施例を
示す要部断面図である。１は被加熱物を入れる加
熱室で、２は加熱室１の開口部全周を取り囲むフ
ランジである。３は加熱室１を収納する外箱で、
外箱３の前方周縁は外箱３を構成する金属板を延
長してドア４を取り囲むサツシユ３ａを兼ねてい
る。５はフランジ２に平面接触するドア後板で、
このドア後板５と外観を成すドア前板６とで電波
迷路７を形成している。加熱室１、フランジ２、
サツシユ３ａ、ドア後板５およびドア前板６はそ
れぞれ金属板から成つている。電波迷路７の入口
７ａには電波透過性の誘電体から成る迷路カバー
７ｂ、ドア前板６の外周には誘電体から成るドア
カバー８が圧入されている。９は多数の***から
成る覗き窓１１の外側に設けた透明な窓外カバー
で、１２は覗き窓１１の加熱室１側に設けた透明
な窓内カバーである。１０はドア前板６の最外周
縁から周期的に張り出 した複数の金属片で、サ
ツシユ３ａと対向している。迷路カバー７ｂとド
アカバー８の要部斜視図をそれぞれ第３図、第４
図に示すが、第１図のように両者８，７ｂは金属
片１０を外面および内面から支えているので、金
属片１０の機械的補強の役目を果たしている。
尚、どちらか一方例えば迷路カバー７ｂのみでも
よい。 FIG. 1 is a sectional view of essential parts of an embodiment of the high-frequency heating device of the present invention. 1 is a heating chamber into which an object to be heated is placed; 2 is a flange surrounding the entire opening of the heating chamber 1; 3 is an outer box that stores heating chamber 1;
The front periphery of the outer box 3 also serves as a sash 3a that extends the metal plate constituting the outer box 3 and surrounds the door 4. 5 is a door rear plate that makes plane contact with the flange 2;
This door rear plate 5 and the door front plate 6 forming the exterior form a radio wave maze 7. heating chamber 1, flange 2,
The sash 3a, the door rear plate 5 and the door front plate 6 are each made of a metal plate. A maze cover 7b made of a dielectric material that transmits radio waves is press-fitted into the entrance 7a of the radio maze 7, and a door cover 8 made of a dielectric material is press-fitted onto the outer periphery of the door front plate 6. Reference numeral 9 denotes a transparent outer window cover provided on the outside of the viewing window 11 consisting of a large number of small holes, and 12 represents a transparent inner window cover provided on the heating chamber 1 side of the viewing window 11. Reference numeral 10 denotes a plurality of metal pieces periodically projecting from the outermost edge of the door front plate 6, and facing the sash 3a. The main parts perspective views of the maze cover 7b and the door cover 8 are shown in FIGS. 3 and 4, respectively.
As shown in the figure, since both 8 and 7b support the metal piece 10 from the outside and inside as shown in FIG. 1, they serve as mechanical reinforcement for the metal piece 10.
Incidentally, only one of them, for example, the maze cover 7b, may be used.
迷路カバー７ｂは、その外面に突き出した凸部
７baによりドア後板５の周端部５ａに固着し、
内面に突き出した凸部７bbを金属片１０の内面
にて近接して、ドア４の外部からの機械的シヨツ
クから金属片１０の変形を防いでいる。断面Ｌ字
形のドアカバー８は、その内面に突き出したスト
ツパー８ａを金属片１０どうしの間隙に挿入し
て、金属片１０の外面に密着固定して、金属片１
０の外部からの機械的シヨツクによる変形を防い
でいる。ドアカバー８は金属片１０の補強材とし
てばかりでなく、窓外カバー９をドア前板６の前
面に固定する役目も果たしている。 The maze cover 7b is fixed to the peripheral end 5a of the door rear plate 5 by a convex portion 7ba protruding from its outer surface,
The convex portion 7bb protruding from the inner surface is placed close to the inner surface of the metal piece 10 to prevent the metal piece 10 from being deformed by a mechanical shock from outside the door 4. The door cover 8 having an L-shaped cross section has a stopper 8a protruding from its inner surface inserted into the gap between the metal pieces 10 and tightly fixed to the outer surface of the metal piece 10.
This prevents deformation due to external mechanical shock. The door cover 8 not only serves as a reinforcing material for the metal piece 10 but also serves to fix the window outer cover 9 to the front surface of the door front plate 6.
第２図は金属片１０の作用を示すための説明図
である。隣り合う金属片１０どうしの間隙寸法Ｂ
を電波迷路７の入口寸法Ａと同等かそれ以上とし
ている。そのため、高次モード、高調波を含む漏
洩電波に対して金属片１０先端とドア後板５の周
端部５ａとの間に生ずる電界成分（漏洩電波が電
波迷路７内に向つて進入できる）が多くなり、金
属片１０どうしの間に生ずる電界成分（漏洩電波
が電波迷路７内に進入できない）が少なくなる。
すなわち、金属片１０は漏洩電波を電波迷路７内
へ能率よく導びき入れる電波的に互いに独立した
一種の整合素子として働く。 FIG. 2 is an explanatory diagram showing the action of the metal piece 10. Gap dimension B between adjacent metal pieces 10
is set to be equal to or larger than the entrance dimension A of the radio maze 7. Therefore, an electric field component is generated between the tip of the metal piece 10 and the peripheral edge 5a of the door rear plate 5 against leakage radio waves including higher-order modes and harmonics (the leakage radio waves can enter into the radio maze 7). is increased, and the electric field component generated between the metal pieces 10 (leaking radio waves cannot enter the radio wave maze 7) is reduced.
That is, the metal piece 10 functions as a kind of matching element that efficiently guides leaked radio waves into the radio wave maze 7 and is independent of each other in terms of radio waves.
実験によると、金属片１０の幅Ｗが10mm、張り
出し寸法Ｈが10mm、間隙寸法Ｂが10mm、入口寸法
Ａが６mm、ドア後板５とフランジ２との間のギヤ
ツプが１mm、高周波出力が500W、水負荷が275ml
の条件で機体から５cmの距離における最大漏洩電
力量は0.03ｍｗ／cm2（従来例実開昭54−130642で
は電波吸収材付で約0.2ｍｗ／cm2）と少なく、十
分実用になることがわかつた。 According to experiments, the width W of the metal piece 10 is 10 mm, the overhang dimension H is 10 mm, the gap dimension B is 10 mm, the entrance dimension A is 6 mm, the gap between the door rear plate 5 and the flange 2 is 1 mm, and the high frequency output is 500 W. , water load is 275ml
Under these conditions, the maximum amount of leakage power at a distance of 5 cm from the aircraft is as small as 0.03 mw/cm 2 (conventional example, 130642/1986, with radio wave absorbing material, was approximately 0.2 mw/cm 2 ), which is sufficient for practical use. I understand.
以上のように、本発明によると、サツシユと対
向した電波迷路の周壁を成すドア前板の最外周縁
に複数の金属片を設け、その隣りどうしの間隙寸
法を電波迷路の入口寸法と同等かそれ以上とし、
漏洩電波を抑えるとともに、ドア後板の周端部と
金属片との間に迷路カバーを圧入固定したので、
金属片の機械的補強が大きく、長時間にわたつて
電波漏洩防止効果を保持できる。さらに電波漏洩
防止効果が大きく、電波吸収材が不要であり、部
品点数が少なく、構造が簡単で組立性が良く、ド
ア外形寸法が小さく、スペースフアクターの良い
高周波加熱装置を提供でき、実施する効果は大な
るものがある。 As described above, according to the present invention, a plurality of metal pieces are provided on the outermost periphery of the door front plate forming the peripheral wall of the radio maze facing the sash, and the gap size between adjacent metal pieces is made equal to the entrance size of the radio maze. more than that,
In addition to suppressing leakage radio waves, the maze cover was press-fitted between the peripheral edge of the door rear plate and the metal piece, so
The mechanical reinforcement of the metal piece is large, and the radio wave leakage prevention effect can be maintained for a long time. Furthermore, it is possible to provide and implement a high-frequency heating device that has a large radio wave leakage prevention effect, does not require radio wave absorbing materials, has a small number of parts, has a simple structure, is easy to assemble, has a small door external dimension, and has a good space factor. The effects are huge.
第１図は本発明の高周波加熱装置の要部断面図
で、第２図は金属片１０の作用を説明するための
要部斜視図で、第３図は迷路カバー７ｂの要部斜
視図で、第４図はドアカバー８の要部斜視図であ
る。
１……加熱室、２……フランジ、３ａ……サツ
シユ、４……ドア、５……ドア後板、５ａ……ド
ア後板５の周端部、６……ドア前板、７……電波
迷路、７ａ……電波迷路７の入口、７ｂ……迷路
カバー、１０……金属片。
FIG. 1 is a sectional view of the main part of the high-frequency heating device of the present invention, FIG. 2 is a perspective view of the main part for explaining the action of the metal piece 10, and FIG. 3 is a perspective view of the main part of the maze cover 7b. , FIG. 4 is a perspective view of the main parts of the door cover 8. DESCRIPTION OF SYMBOLS 1...Heating chamber, 2...Flange, 3a...Sash, 4...Door, 5...Door rear plate, 5a...Peripheral end of door rear plate 5, 6...Door front plate, 7... Radio maze, 7a... Entrance of radio maze 7, 7b... Maze cover, 10... Metal piece.
Claims (1)
及びこのフランジ２の前方に突出した金属板から
成るサツシユ３ａを備え、同開口部を開閉するド
ア４の周縁に電波迷路７を構成し、同迷路７はフ
ランジ２に平面接触するドア後板５と最外周縁が
サツシユ３ａに対向した複数の金属片１０から成
るドア前板６とで囲まれ、金属片１０の隣りどう
しの間〓寸法Ｂを電波迷路７の入口寸法Ａと同等
かそれ以上とし、更に電波迷路７の入口７ａをカ
バーする電波透過性の誘電体からなる迷路カバー
７ｂをドア後板５の周端部５ａと金属片１０との
間に圧入固定したことを特徴とする高周波加熱装
置。1 Flange 2 surrounding the entire opening of heating chamber 1
A radio labyrinth 7 is formed around the periphery of the door 4 which opens and closes the opening, and the labyrinth 7 includes a door rear plate 5 which is in plane contact with the flange 2. and a door front plate 6 consisting of a plurality of metal pieces 10 whose outermost edge faces the sash 3a, and the distance between adjacent metal pieces 10 is such that the dimension B is equal to or larger than the entrance dimension A of the radio maze 7. In addition, a maze cover 7b made of a radio wave transparent dielectric material that covers the entrance 7a of the radio maze 7 is press-fitted and fixed between the peripheral end 5a of the door rear plate 5 and the metal piece 10. heating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6386484A JPS60207281A (en) | 1984-03-30 | 1984-03-30 | High frequency heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6386484A JPS60207281A (en) | 1984-03-30 | 1984-03-30 | High frequency heating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60207281A JPS60207281A (en) | 1985-10-18 |
| JPS6361757B2 true JPS6361757B2 (en) | 1988-11-30 |
Family
ID=13241603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6386484A Granted JPS60207281A (en) | 1984-03-30 | 1984-03-30 | High frequency heating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60207281A (en) |
-
1984
- 1984-03-30 JP JP6386484A patent/JPS60207281A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60207281A (en) | 1985-10-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5075525A (en) | Wave shielding device for microwave oven | |
| US4645892A (en) | Sealing arrangement for microwave ovens | |
| US4146768A (en) | Door for a microwave oven | |
| JPS6361757B2 (en) | ||
| JPS6361754B2 (en) | ||
| GB2058529A (en) | Microwave heating apparatus | |
| JPS6361758B2 (en) | ||
| JPS60216490A (en) | High frequency heating device | |
| JPS6361759B2 (en) | ||
| JPS6361755B2 (en) | ||
| JPS6363119B2 (en) | ||
| JPS6361756B2 (en) | ||
| JPS60240095A (en) | High frequency heating device | |
| JPS6132988A (en) | High frequency heater | |
| JPS6132987A (en) | High frequency heater | |
| JPS61156690A (en) | High frequecy heater | |
| JPS6352757B2 (en) | ||
| JPS60175394A (en) | High frequency heater | |
| JPH0129040B2 (en) | ||
| JPS6155754B2 (en) | ||
| JPS5923435B2 (en) | Door in high frequency heating equipment | |
| JPS6243094A (en) | Radio wave leak preventer for electronic microoven range | |
| JPS60170191A (en) | High frequency heater | |
| JPH0127598Y2 (en) | ||
| JPS642394Y2 (en) |