JPS5934076Y2 - Radio wave leakage prevention device for high frequency heating equipment - Google Patents

Description

【考案の詳細な説明】 本考案は高周波を利用して食品等の加熱殺菌を行なう高
周波加熱装置の扉部分の改良に係る。[Detailed Description of the Invention] The present invention relates to an improvement of the door portion of a high-frequency heating device that uses high-frequency waves to heat and sterilize foodstuffs and the like.

高周波加熱装置は２４５０ＭＨｚの高周波を利用して所
期の加熱殺菌等を行なうものであるが、その電波が高周
波加熱装置本体と加熱室開口を開閉自在な扉の間から外
部に漏洩する危険性があり、従来は扉を本体に密着させ
る金属接触方式により電波漏洩を防止していた。High-frequency heating equipment uses high frequency waves of 2450 MHz to carry out the desired heat sterilization, etc., but there is a risk that the radio waves may leak to the outside between the main body of the high-frequency heating equipment and the door that opens and closes the heating chamber. Previously, radio wave leakage was prevented by a metal contact method in which the door was tightly attached to the main body.

然しながら、扉と装置本体とを全周面にわたって良好な
接触を行なわせることは困難であり、電波漏洩も大きい
という欠点があった。However, it is difficult to make good contact between the door and the main body of the device over the entire circumference, and there is a drawback that radio wave leakage is large.

そこで、扉に装置本体と金属接触する部分と電波トラッ
プとなるキャビティと、電波吸収材を設け、電波漏洩を
確実に防止する高周波加熱装置の電波漏洩防止装置が考
案され、実装にあって大きな成果を」―げている。Therefore, a radio wave leakage prevention device for high-frequency heating equipment was devised that reliably prevents radio wave leakage by providing the door with a part that makes metal contact with the main body of the device, a cavity that acts as a radio wave trap, and a radio wave absorbing material, and has achieved great results in its implementation. "I'm getting."

本考案は上記のような扉に構成された電波漏洩防止装置
に一例として使用されている電波吸収材の形状に特に工
夫を施したもので、以下図面と共に本考案の電波漏洩防
止装置について説明する。The present invention is a special modification of the shape of the radio wave absorbing material used in the radio wave leakage prevention device constructed on the door as described above, and the radio wave leakage prevention device of the present invention will be explained below with reference to the drawings. .

第１図にお・いて、１は電イルンジ本体で、この本体１
内には前面を開ｒ−］ した金属製の加熱室２を設け、
加熱室２外部に設けられたマグネトロン３によって発生
された高周波を導波管４により加熱室２に導びき、ター
ンテーブル５に載置された食品６を加熱調理するように
構成している。In Fig. 1, 1 is the electric lunge main body, and this main body 1
Inside is a metal heating chamber 2 with an open front.
High frequency waves generated by a magnetron 3 provided outside the heating chamber 2 are guided into the heating chamber 2 through a waveguide 4, and food 6 placed on a turntable 5 is heated and cooked.

加熱室２の開「１部には左端縁を上記本体１の前端壁に
枢支した扉７を開閉自在に装着している。A door 7 whose left edge is pivoted to the front end wall of the main body 1 is attached to the opening part of the heating chamber 2 so as to be openable and closable.

尚、ターンテーブル５は加熱室２の底板下に配設したモ
ータ８により回転駆動される。Incidentally, the turntable 5 is rotationally driven by a motor 8 disposed under the bottom plate of the heating chamber 2.

一方上記扉７は第３図乃至第５図に示すように、加熱室
２を視覚するため電波遮蔽用のパンチング板を透明板に
より挟持する透視窓９と、この透視窓９を保持するため
扉外周部を構成する金属製の中空な扉枠１０とから構成
している。On the other hand, as shown in FIGS. 3 to 5, the door 7 includes a transparent window 9 in which a punching plate for shielding radio waves is sandwiched between transparent plates in order to view the heating chamber 2, and a door for holding the transparent window 9. It is composed of a hollow door frame 10 made of metal and forming an outer peripheral part.

この透視窓９は全外周縁を扉枠１０と枠状のシーラ板１
１とによる装着保持をもって扉枠１０に固定し、また扉
７の閉戊状態にあって加熱室２の前壁１３に金属板のシ
ーラ板１１は数個所ネジ１２によって扉枠１０に取り付
ける。This see-through window 9 has its entire outer periphery connected to a door frame 10 and a frame-shaped sealer plate 1.
The sealer plate 11, which is a metal plate, is fixed to the door frame 10 by attaching and holding the door 7 to the front wall 13 of the heating chamber 2 when the door 7 is closed.

さて、扉枠１０内部には断面り字状の金属板１４を立設
し、シーラ板１１とこの金属板１４との囲みにより扉枠
１０に電波トラップとなるチョーク室構造のキャビティ
１５を形成している。Now, inside the door frame 10, a metal plate 14 with a cross-sectional shape is set upright, and a cavity 15 having a choke chamber structure that becomes a radio wave trap is formed in the door frame 10 by surrounding the sealer plate 11 and this metal plate 14. ing.

このキャビティ１５の外周側の加熱室２開口面側の一部
には凹部１６を形成し、ここに電波吸収材１７を配設す
る。A recess 16 is formed in a part of the outer periphery of the cavity 15 on the opening surface side of the heating chamber 2, and a radio wave absorbing material 17 is disposed in the recess 16.

この断面コ字状の電波吸収材１７は扉枠１０の全周にわ
たって漏洩電波を吸収するよう棒状に一体形成したフェ
ライトを用い、上記凹部１６に装着した後引掛は爪２１
．２２を一体形成する断面略コ字状のキャビティカバー
１８をキャビティ１５の開口部に取付け、第５図に拡大
して示すようにカバー１８の外周部を電波吸収材１７の
小突起１９に係合させて電波吸収材１７を凹部１６に押
さえつけ保持する。The radio wave absorbing material 17 having a U-shaped cross section is made of ferrite integrally formed into a rod shape so as to absorb leaked radio waves over the entire circumference of the door frame 10, and after being attached to the recess 16, the hook 21
．． 22 is integrally formed with a cavity cover 18 having a substantially U-shaped cross section is attached to the opening of the cavity 15, and the outer periphery of the cover 18 is engaged with the small protrusion 19 of the radio wave absorbing material 17, as shown in an enlarged view in FIG. Then, the radio wave absorbing material 17 is pressed and held in the recess 16.

尚、従来の電波吸収材２０は第２図のようにたんざく状
の４本フェライトを用いてドア枠１０の全周に組立てて
いたもので、扉組立がそれだけ煩雑となり、第３図のよ
うに単品の棒状フェライトを用いればその煩雑さから回
避できる。In addition, the conventional radio wave absorbing material 20 was assembled around the entire circumference of the door frame 10 using four tanzaku-shaped ferrites as shown in Fig. 2, which made the door assembly that much more complicated. If a single rod-shaped ferrite is used, the complexity can be avoided.

以上のような構造の扉１０によれば、本体１に閉成状態
にあってシーラ板１１の金属接触、キャビティー１５の
漏洩電波トラップそして電波吸収材１７による漏洩電波
の吸収によって、確実に扉１０と本体１間の電波漏洩を
防止することができる。According to the door 10 having the above structure, when the main body 1 is in the closed state, the metal contact of the sealer plate 11, the leakage radio wave trap of the cavity 15, and the absorption of leakage radio waves by the radio wave absorbing material 17 ensure that the door is closed. Radio wave leakage between 10 and main body 1 can be prevented.

以上のように、本考案の電波漏洩防止装置によれば、フ
ェライト等電波吸収材を棒状単品化することによって扉
組立作業が簡略化し、組立時間の短縮にもなる高周波加
熱装置を提供できる。As described above, according to the radio wave leakage prevention device of the present invention, it is possible to provide a high frequency heating device that simplifies the door assembly work and shortens the assembly time by making the radio wave absorbing material such as ferrite into a single bar-shaped product.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案を電子レンジに適用した場合の一実施例
を示す概略構成図、第２図は従来の扉構造を説明する扉
裏面図、第３図は本考案を実施する扉裏面図、第４図は
第１図の扉部分拡大断面図、第５図は第４図のＡ部拡大
図。 ２：加熱室、１０：扉枠、７：扉、１７：電波吸収材。Fig. 1 is a schematic configuration diagram showing an example of applying the present invention to a microwave oven, Fig. 2 is a back view of the door explaining the conventional door structure, and Fig. 3 is a back view of the door implementing the present invention. , FIG. 4 is an enlarged cross-sectional view of the door portion in FIG. 1, and FIG. 5 is an enlarged view of part A in FIG. 4. 2: heating chamber, 10: door frame, 7: door, 17: radio wave absorbing material.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 加熱室開口を開閉する扉の外周部を構成する金属製の中
空の扉枠の内部に立設する断面り字状の金属板と扉の閉
成時に加熱室の前壁に金属接触するシーラー板とにより
形成されるチョーク室構造のキャビティの外周側の加熱
室開口面側の一部に形成した凹部に、断面コ字状にて全
周にわたって漏洩電波を吸収するよう棒状に一体形成し
た電波吸収材を配設するとともに、引掛は爪を一体形成
する断面略コ字状のキャビティカバーを上記キャビティ
の開［］部に取付け、該キャビティカバーの外周部を上
記電波吸収材の突起に係合させて該電波吸収材を上記凹
部に装着保持したことを特徴とする高周波加熱装置の電
波漏洩防止装置。A metal plate with an orthogonal cross-section that is installed inside the hollow metal door frame that forms the outer periphery of the door that opens and closes the heating chamber opening, and a sealer plate that makes metal contact with the front wall of the heating chamber when the door is closed. A radio wave absorber is integrally formed in a bar shape with a U-shaped cross section to absorb leakage radio waves all around the circumference in a recess formed in a part of the heating chamber opening side on the outer periphery of the cavity of the choke chamber structure formed by the above. At the same time, a cavity cover having a generally U-shaped cross section and a hook integrally formed with the hook is attached to the opening [ ] of the cavity, and the outer periphery of the cavity cover is engaged with the protrusion of the radio wave absorbing material. A radio wave leakage prevention device for a high frequency heating device, characterized in that the radio wave absorbing material is mounted and held in the recess.