JPS61109292A - High frequency heater - Google Patents

High frequency heater

Info

Publication number
JPS61109292A
JPS61109292A JP23182984A JP23182984A JPS61109292A JP S61109292 A JPS61109292 A JP S61109292A JP 23182984 A JP23182984 A JP 23182984A JP 23182984 A JP23182984 A JP 23182984A JP S61109292 A JPS61109292 A JP S61109292A
Authority
JP
Japan
Prior art keywords
groove
door
radio wave
heating chamber
opening
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.)
Pending
Application number
JP23182984A
Other languages
Japanese (ja)
Inventor
石原 正弘
一男 金子
岩淵 康司
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Heating Appliances Co Ltd
Original Assignee
Hitachi Heating Appliances Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Heating Appliances Co Ltd filed Critical Hitachi Heating Appliances Co Ltd
Priority to JP23182984A priority Critical patent/JPS61109292A/en
Publication of JPS61109292A publication Critical patent/JPS61109292A/en
Pending legal-status Critical Current

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  • Constitution Of High-Frequency Heating (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。
(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は高周波加熱装置に係り、とくに高周波加熱装置
の加熱室の入口に設けた開閉可能なドアの電波漏洩防止
構造に関するものである。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a high-frequency heating device, and more particularly to a radio wave leakage prevention structure for an openable and closable door provided at the entrance of a heating chamber of a high-frequency heating device.

従来の技術 高周波加熱装置は高周波電波発生源であるマグネトロン
から供給される高周波エネルギーによって加熱室内に置
かれた被加熱物である食品をカロ熱する装置である。
2. Description of the Related Art A high-frequency heating device is a device that uses high-frequency energy supplied from a magnetron, which is a source of high-frequency radio waves, to heat food, which is an object to be heated, placed in a heating chamber.

この高周波加熱装置には開閉可能なドアカニ設けられて
いるが、加熱室の本体とドアの間にシマわずかな間隙が
あり、この間隙から電波力;外部に漏洩する。人体その
他への悪影響を考慮して、漏洩量を法定の許容値以下に
する必要がある。そのために主としてドア面に漏洩防止
機構を設けて(Xる。
This high-frequency heating device is equipped with a door crab that can be opened and closed, but there is a slight gap between the main body of the heating chamber and the door, and radio wave power leaks to the outside through this gap. It is necessary to reduce the amount of leakage to below the legally permissible value, taking into account the adverse effects on the human body and others. For this purpose, a leakage prevention mechanism is mainly provided on the door surface (X).

一般的なドアにおける電波漏洩防止機構としては、チョ
ーク方式、′rなわちドア周縁部に電波減衰用の溝を有
するチョーク構造体を配置し、カロ熱室とドアで形成さ
れる電波通路の入口力1ら上述溝までの寸法と、間溝の
長さをそれぞれ使用電波々長の−とする方法がある。こ
の方法によれ+f、電波通路の入口がインピーダンス的
に短絡されたことと等価になって、電波の漏洩を防止で
きるfFl 、9゜を有する。また他の電波漏洩防止機
構としてをま。
A typical mechanism for preventing radio wave leakage in doors is the choke method, in which a choke structure with grooves for attenuating radio waves is placed around the edge of the door, and the entrance to the radio wave passage formed by the heating chamber and the door is used. There is a method in which the dimension from force 1 to the above-mentioned groove and the length of the gap are each set to - of the radio wave length used. With this method, +f is equivalent to short-circuiting the entrance of the radio wave path in terms of impedance, and fFl is 9°, which can prevent radio wave leakage. It can also be used as another radio wave leakage prevention mechanism.

電波通路や間溝の構造部分に周期構造体を配して。Periodic structures are placed in the structural parts of radio wave channels and grooves.

電波伝搬方向を規制することによって電波の漏洩を防止
する方法がある。また特公昭59−23435号公報に
示されるように、電波漏洩路と平行な方向に突出するよ
う金属製の先端の丸い三角形状の爪状体を配列し、その
形状と寸法に特定の関係を与えることにより電波の漏洩
を抑制する方法や、特開昭58−212094号公報で
示されるコンパクト化方法もある。
There is a method of preventing radio wave leakage by regulating the direction of radio wave propagation. Furthermore, as shown in Japanese Patent Publication No. 59-23435, triangular metal claws with rounded tips are arranged so as to protrude in a direction parallel to the radio wave leakage path, and a specific relationship is established between the shape and dimensions. There is also a method of suppressing the leakage of radio waves by giving the same amount of energy, and a compacting method shown in Japanese Patent Application Laid-Open No. 58-212094.

発明が解決しようとする問題点 電波漏洩防止効果の点で十分でなく、装置の形状が大型
となる点である。
Problems to be solved by the invention are that the effect of preventing radio wave leakage is not sufficient and the shape of the device becomes large.

問題点を解決するための手段 すなわち本発明は、ドアの周縁にコ字状断面を有する金
属溝(以下溝と呼ぶ)を設けてドアを構成するとともに
、溝の開口を加熱室の開口周縁張出壁(以下サラツユプ
レートと呼ぶ)に対向して開口させておき、この溝の内
部に帯状金属薄板から作られたコ字状折曲げ片(以下折
曲げ片と呼ぶ)を、その開口側が溝の開口側と一致する
ように。
A means for solving the problem, that is, the present invention, is to construct a door by providing a metal groove (hereinafter referred to as a groove) having a U-shaped cross section on the periphery of the door, and to connect the opening of the groove to the periphery of the opening of the heating chamber. An opening is made facing the protruding wall (hereinafter referred to as the Saratsuyu plate), and a U-shaped bent piece (hereinafter referred to as the bent piece) made from a strip metal thin plate is placed inside this groove, with the opening side facing to match the open side of the groove.

しかも折曲げ片の先端部と溝の内底面が特定距離だけ離
れるようにし、この折曲げ片を溝の長手方向に周期的に
設け、折曲げ片の横幅、ピッチとの関係を特定条件に選
定するものである。
Moreover, the tip of the bent piece and the inner bottom surface of the groove are separated by a specific distance, the bent pieces are provided periodically in the longitudinal direction of the groove, and the relationship between the width of the bent piece and the pitch is selected under specific conditions. It is something to do.

作用 コ字状の折り曲げ片の深さが電波伝搬線路長として電波
の波長の1となって電波チョークとして機能し、溝の内
底面と折曲げ片の外底面との空間がスパークの発生を防
止する。
The depth of the U-shaped bent piece serves as the length of the radio wave propagation line, which is one wavelength of the radio wave, and functions as a radio wave choke, and the space between the inner bottom surface of the groove and the outer bottom surface of the bent piece prevents the generation of sparks. do.

実施例 以下本発明の高周波加熱装置の構成1作用および効果を
図を用いて説明する。
EXAMPLES Below, the functions and effects of the configuration 1 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外観?示す斜視図で
ある。図において、1は被加熱物である食品を格納する
加熱室、2は加熱室1を収納するキャビネットである。
Fig. 1 shows the appearance of the high-frequency heating device of the present invention? FIG. In the figure, 1 is a heating chamber that stores food, which is an object to be heated, and 2 is a cabinet that stores the heating chamber 1.

キャビネット2の前方周縁はキャビネットを構成する金
属板を延長してドア6を取り囲んでおり、加熱室1の周
縁張出壁の一部たるサツシュプレート4を形成している
。5は加熱室1の開口部全周を取り囲む7ランジ部分で
The front peripheral edge of the cabinet 2 is an extension of the metal plate constituting the cabinet, surrounds the door 6, and forms a sash plate 4 which is a part of the peripheral projecting wall of the heating chamber 1. 5 is a 7-lunge portion that surrounds the entire opening of heating chamber 1.

加熱室の開口周縁張出壁の一部を構成している。It constitutes a part of the opening peripheral overhanging wall of the heating chamber.

6は高周波加熱装置を動作させるための操作部および表
示部、7はドアの把手、8は覗き窓である。
Reference numeral 6 denotes an operation section and display section for operating the high-frequency heating device, 7 a door handle, and 8 a viewing window.

第2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。第1図と同じ個所は同一番号で示した。
FIG. 2 is a sectional view of essential parts showing an embodiment of the high frequency heating device of the present invention. The same parts as in Figure 1 are indicated by the same numbers.

この第2図において加熱室1の側壁面9の一部は折り返
し部分10を有し、折り返し部分10とオープンフラン
ジ部分5の下面11は接合されている。12はキャビネ
ットの一部であり、4はキャビネット12が延長されて
形成されたサラツユプレートである。
In FIG. 2, a part of the side wall surface 9 of the heating chamber 1 has a folded portion 10, and the folded portion 10 and the lower surface 11 of the open flange portion 5 are joined. 12 is a part of the cabinet, and 4 is a Saratsuyu plate formed by extending the cabinet 12.

フランジ部分5の前方には断面が略コ字状をした金属溝
15があり、その開口部14は7ランジ部分5と向い合
っている。溝13の外底面15は平担であって、ドア後
板13と接合されてドアを構成する。
In front of the flange portion 5 is a metal groove 15 having a substantially U-shaped cross section, the opening 14 of which faces the seven flange portion 5. The outer bottom surface 15 of the groove 13 is flat and is joined to the door rear plate 13 to form the door.

折曲げ片17は帯状金属薄板により構成され、その開口
部14aは溝13の開口I11になるようにするととも
に、溝13の長手方向に周期的に設ける。折曲げ片17
の空間部18の深さは使用電波々長の−となるように設
定する。折曲げ片17と溝13で形成される両者の空隙
部19a、 19b、 19cは空気層または誘電体層
で形成され、空隙部の厚さく溝13の内壁面と折曲げ片
17の外壁面との距離)は使用電波々長の吉〜ふとする
。なお折曲げ片17の端部20はフランジ部分5と平行
とし、その最終端部は溝13の開口側端部と接合する。
The bent piece 17 is made of a strip-shaped thin metal plate, and its opening 14a is arranged to correspond to the opening I11 of the groove 13, and is provided periodically in the longitudinal direction of the groove 13. Folded piece 17
The depth of the space 18 is set to be - of the radio wave length used. Both gaps 19a, 19b, 19c formed by the bent piece 17 and the groove 13 are formed of an air layer or a dielectric layer, and the inner wall surface of the groove 13 and the outer wall surface of the bent piece 17 are thick. (distance) depends on the radio wave length used. Note that the end portion 20 of the bent piece 17 is parallel to the flange portion 5, and its final end portion is joined to the opening side end portion of the groove 13.

21はドアカバーで、プラスチックにより構成される。21 is a door cover made of plastic.

22は折曲げ片17の開口部14aを覆うプラスチック
カバーである。ドア後板13の延長部分には多数の小孔
よりなる覗き窓(図示せず)があり、これらt含めてド
ア全体が構成される。
A plastic cover 22 covers the opening 14a of the bent piece 17. There is a viewing window (not shown) consisting of a large number of small holes in the extension of the door rear plate 13, and the entire door is made up of these viewing windows (not shown).

第6図は第2図における溝および折曲げ片の配置状態を
示す部分拡大斜視図である。図においては、溝周辺と折
曲げ片の開口部を覆うプラスチックカバーは取除いであ
る。図において溝13の深さは折曲げ片17の空間部1
8の深さよりも前記したように特定距離をへたてた分だ
け深いものとする。
6 is a partially enlarged perspective view showing the arrangement of the grooves and bent pieces in FIG. 2. FIG. In the figure, the plastic cover surrounding the groove and the opening of the folded piece has been removed. In the figure, the depth of the groove 13 is the space 1 of the bent piece 17.
As described above, the depth is set to be deeper than the depth of 8 by an amount corresponding to the specified distance.

種々の検討結果によれば、第3図における各部分の最適
条件は、溝15の内幅WO=20+nmにおいて折曲げ
片17の折曲げ面23.24.25.26  を加熱室
のフランジ部分と平行となるように配置し、折曲げ片1
7の空間部18の横幅27は2.5〜10mm、折曲げ
片17の内壁28と溝13の側壁面29は平行で、空間
部18の深さは2.450MH2の高周波電波々長のほ
ぼ−に設定する。折曲げ片17の切込み深さは加熱室に
対し離れている側をMl、加熱室に近い側をM2とする
とM1≦M2となるように設定する。折曲げ片17の横
幅Wは20朋、配列ピッチP(P−W十切欠部3oの長
さ)は55叫とする。かかる設定条件において、前記折
曲げ片17と溝13で形成される空隙部は第4図に示す
ように構成される。すなわち溝13に対して折曲げ片1
7は折曲げ面24.25の端部31,32によって固定
支持され、底面側は溝13の底面より離れて浮かせた状
態とする。このときの空隙部は19a、その空間距離は
tlである。このように折曲げ片17と溝13を離す理
由は、とくに溝13の内底面63と折曲げ片17の外底
面′54を電気的に絶縁するだけの空間距離を持たせ、
溝内に入り込む漏洩電波によって局部的にスパークを生
じないようにすることと、ドアを作り易くするためであ
る。しがし19a部分の空間距離t1が大きくなるとド
アの厚さを増すことになるから寸法的に制約があり、実
験的には使用電波々長の6の長さが好ましい。他の空隙
部19b。
According to the results of various studies, the optimal conditions for each part in FIG. Arrange them so that they are parallel, and bend the pieces 1
The width 27 of the space 18 of No. 7 is 2.5 to 10 mm, the inner wall 28 of the bent piece 17 and the side wall surface 29 of the groove 13 are parallel, and the depth of the space 18 is approximately equal to the high frequency radio wave length of 2.450 MH2. - Set to -. The cutting depth of the bent piece 17 is set so that M1≦M2, where M1 is the side away from the heating chamber and M2 is the side close to the heating chamber. The width W of the bent piece 17 is 20 mm, and the arrangement pitch P (the length of the P-W cutout portion 3o) is 55 mm. Under such setting conditions, the gap formed by the bent piece 17 and the groove 13 is configured as shown in FIG. 4. In other words, the bent piece 1 is
7 is fixedly supported by the ends 31 and 32 of the folded surfaces 24 and 25, and the bottom surface side is placed in a floating state away from the bottom surface of the groove 13. At this time, the void portion is 19a, and its spatial distance is tl. The reason for separating the bent piece 17 and the groove 13 in this way is to provide a space distance sufficient to electrically insulate the inner bottom surface 63 of the groove 13 and the outer bottom surface '54 of the bent piece 17.
This is to prevent local sparks from being generated due to leakage radio waves entering the groove, and to make the door easier to manufacture. If the spatial distance t1 of the baffle 19a increases, the thickness of the door increases, so there are dimensional restrictions, and experimentally a length of 6, which is the radio wave length used, is preferable. Another cavity 19b.

19cの空間距離12. t5は、前記折曲げ面寸法に
よって決められるが、使用電波々長に対してそれぞれ1
乙5以内で電波漏洩防止効果が発揮され、この長さ以上
ではとくに効果が高められることはない。
19c spatial distance 12. t5 is determined by the above-mentioned bending surface dimensions, and is 1 for each radio wave length used.
The radio wave leakage prevention effect is exhibited within Otsu 5, and the effect is not particularly enhanced beyond this length.

発明の効果 なお本発明の実施例においてはコ字状溝および周期構造
体がいずれも7272部に対してほぼ垂直な位置に配置
された場合を説明したが、この位置にとくに限定される
ものではない。すなわち第2図の他の変形として、コ字
状溝および周期構造体の開口部がサツシュプレート4側
にある場合。
Effects of the Invention In the embodiments of the present invention, a case has been described in which the U-shaped groove and the periodic structure are both arranged at positions substantially perpendicular to the 7272 section, but the invention is not particularly limited to this position. do not have. That is, as another modification of FIG. 2, the U-shaped groove and the opening of the periodic structure are located on the sash plate 4 side.

すなわち、前述開口部を90’回転させ、コ字状溝の側
壁部がフランジ部と接する構造においてもすでに述べた
と同様の効果を得ることができる。     “以上の
べたように本発明によれば、高周波加熱装置におけるド
ア構成要素としてほぼコ字状断面の金属製溝部と、この
溝部に帯状金属薄板をコ字状に折曲げた周期構造体を溝
の長手方向に配列し。
That is, even in a structure in which the opening is rotated 90' and the side wall of the U-shaped groove is in contact with the flange, the same effects as described above can be obtained. “As described above, according to the present invention, a metal groove portion having an approximately U-shaped cross section is used as a door component in a high-frequency heating device, and a periodic structure in which a strip metal thin plate is bent into a U-shape is inserted into the groove portion. arranged in the longitudinal direction.

両者を空間的に隔てる空隙部の寸法を規制することによ
り、加熱室の開口周縁張出壁たるフランジ部分あるいは
サツシュプレートとドアの隙間から漏洩する電波を極め
て低レベルに抑圧できるので。
By restricting the size of the gap that spatially separates the two, it is possible to suppress the radio waves leaking from the flange portion, which is the protruding wall around the opening of the heating chamber, or from the gap between the sash plate and the door to an extremely low level.

安全な高周波加熱装置を提供できる。また構造の点では
、金属製溝部内底面と周期構造体の外底部を電気的に絶
縁するに必要な最小限の距離だけ浮かせ、また金属製溝
部側壁と周期構造体側壁面で形成される空隙部の距離を
小さくすることによって、ドアの厚さ乞薄く、シかも額
縁部分を小さくできるので、ドア全体の小形化を達成で
き、安全で小形の高周波加熱装置を提供することができ
る。
We can provide safe high-frequency heating equipment. In terms of structure, the inner bottom of the metal groove and the outer bottom of the periodic structure are floated by the minimum distance necessary to electrically insulate them, and the gap formed by the side wall of the metal groove and the side wall of the periodic structure is By reducing the distance between the doors, the thickness of the door can be made thinner, and the frame portion can be made smaller, so that the entire door can be made smaller, and a safe and smaller high-frequency heating device can be provided.

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

第1図は本発明の一実施例による高周波加熱装置の外観
を示す斜視図、第2図は本発明の同高周波加熱装置の要
部断面図、第6図は本発明における同コ字状溝及び周期
構造体の配置を示す一部切欠部分拡大図、第4図は本発
明を説明するための同部分拡大断面図である。 1・・・加 熱 室、   6・・・ド   ア。 4・・・開口周縁張出壁(サツシュプレート)。 13・・・金 属 溝、17・・・コ字状の折曲げ片。
FIG. 1 is a perspective view showing the external appearance of a high-frequency heating device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of a main part of the same high-frequency heating device according to the present invention, and FIG. 6 is a U-shaped groove according to the present invention. FIG. 4 is an enlarged partially cutaway view showing the arrangement of the periodic structure, and FIG. 4 is an enlarged cross-sectional view of the same partially for explaining the present invention. 1...Heating chamber, 6...Door. 4...Opening peripheral overhanging wall (satush plate). 13...Metal groove, 17...U-shaped bent piece.

Claims (1)

【特許請求の範囲】[Claims] 被加熱物を収納する加熱室と、この加熱室の開口部に開
閉可能なドアを備えたものにおいて、前記ドア(6)の
周縁に断面コ字状の金属溝(13)を設け、該溝(13
)の開口を前記加熱室(1)の開口周縁張出壁(4)に
対向して開口させ、前記溝(13)内には帯状金属薄板
からなるコ字状の折曲げ片(17)をその開口側が前記
溝(13)の開口側になるようにするとともに前記溝(
13)の長手方向に周期的に設け、かつ該折曲げ片(1
7)は前記溝(13)の内壁面の対応個所に対して使用
電波々長のおおむね15〜60分の1だけ離れるように
したことを特徴とする高周波加熱装置。
In a heating chamber that stores an object to be heated and a door that can be opened and closed at the opening of the heating chamber, a metal groove (13) having a U-shaped cross section is provided at the periphery of the door (6). (13
) is opened to face the opening peripheral overhanging wall (4) of the heating chamber (1), and a U-shaped bent piece (17) made of a strip metal thin plate is placed in the groove (13). The opening side thereof should be the opening side of the groove (13), and the groove (
13) provided periodically in the longitudinal direction, and the bent pieces (1
7) A high-frequency heating device characterized in that the groove (13) is spaced apart from the corresponding part on the inner wall surface by approximately 1/15 to 1/60 of the radio wave length used.
JP23182984A 1984-11-02 1984-11-02 High frequency heater Pending JPS61109292A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23182984A JPS61109292A (en) 1984-11-02 1984-11-02 High frequency heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23182984A JPS61109292A (en) 1984-11-02 1984-11-02 High frequency heater

Publications (1)

Publication Number Publication Date
JPS61109292A true JPS61109292A (en) 1986-05-27

Family

ID=16929669

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23182984A Pending JPS61109292A (en) 1984-11-02 1984-11-02 High frequency heater

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