JPH0129040B2 - - Google Patents
Info
- Publication number
- JPH0129040B2 JPH0129040B2 JP7628082A JP7628082A JPH0129040B2 JP H0129040 B2 JPH0129040 B2 JP H0129040B2 JP 7628082 A JP7628082 A JP 7628082A JP 7628082 A JP7628082 A JP 7628082A JP H0129040 B2 JPH0129040 B2 JP H0129040B2
- Authority
- JP
- Japan
- Prior art keywords
- door
- latch
- corrugated plate
- radio wave
- frequency
- 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 30
- 239000002184 metal Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 2
- 230000000737 periodic effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 5
- 230000005672 electromagnetic field Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Landscapes
- Constitution Of High-Frequency Heating (AREA)
- Electric Ovens (AREA)
Description
【発明の詳細な説明】
本発明は高周波エネルギーによつて食品などの
被加熱物を加熱処理する高周波加熱装置に係り、
特に電波漏洩防止用の周期構造体付きのドアの改
良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-frequency heating device that heats an object to be heated such as food using high-frequency energy.
In particular, the present invention relates to an improvement of a door with a periodic structure for preventing radio wave leakage.
従来、ドア周縁に設けたチヨーク溝の電波漏洩
防止効果を増すため、チヨーク溝の内部に周期構
造体を取付けたり、チヨーク溝の周壁自体を多数
の金属片からなる周期構造体で形成したものが多
数提案されているが、実用化されたものは少な
い。実用化されたものというのは、加熱周波数
2450MHzで、その自由空間波長λ0（122mm）の約
１／４の深さの基本波用チヨーク溝を加熱室の開
口部周縁（前面フランジ面）に対して直角方向に
設けているため、ドアが厚く、電波シールに要す
るスペースが大形となり、装置全体が大形となつ
ていた。基本波に対する電波シールのみを行なつ
ているので、高周波に対するシール用に電波吸収
材を追加しているものが見られる。さらに、周期
構造体付近に電磁界を集中させるため、加熱室内
に被加熱物を入れない空焼時にドアと加熱室開口
部周縁との接触部での異常加熱やスパークの発生
を助長し易いなどの欠点を有していた。 Conventionally, in order to increase the radio wave leakage prevention effect of the chiyoke groove provided at the periphery of the door, a periodic structure was attached inside the chiyoke groove, or the peripheral wall of the chiyoke groove itself was formed with a periodic structure made of a large number of metal pieces. Although many proposals have been made, few have been put into practical use. What has been put into practical use is the heating frequency.
At 2450 MHz, the fundamental wave groove with a depth of approximately 1/4 of the free space wavelength λ 0 (122 mm) is provided in a direction perpendicular to the periphery of the opening of the heating chamber (front flange surface). was thick, the space required for the radio wave seal was large, and the entire device was large. Since radio wave sealing is performed only for fundamental waves, some radio wave absorbing materials are added for sealing against high frequencies. Furthermore, because the electromagnetic field is concentrated near the periodic structure, it is easy to promote abnormal heating and spark generation at the contact area between the door and the periphery of the opening of the heating chamber during dry firing when no object to be heated is placed inside the heating chamber. It had the following drawbacks.
そこで、本発明は上記の点に鑑み、外形寸法が
小さくでき、かつ、上記異常加熱やスパークが発
生しにくい周期構造体付きのドアを備えた高周波
加熱装置を提供することを目的とする。 SUMMARY OF THE INVENTION In view of the above points, it is an object of the present invention to provide a high-frequency heating device equipped with a door equipped with a periodic structure that can have a small external size and is less likely to cause abnormal heating or sparks.
次に本発明の一実施例を図面とともに説明す
る。 Next, one embodiment of the present invention will be described 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
示す要部斜視図である。図において、１は高周波
エネルギーを発生する高周波発振器、２は高周波
発振器１と加熱室３とを連結する導波管である。
４は加熱室３開口部前面に設けたフランジで、こ
のフランジ４にはドア５に設けたラツチ５ａ，５
ｂが貫通するラツチ挿入口４ａ，４ｂがあいてい
る。ラツチ５ａ，５ｂは高周波発振器１のオン・
オフを制御すると共にドア５の密閉状態を保持す
る。５ｃはドア５を閉じたときにフランジ４に平
面接触するドア後板で、金属板から成る。５ｄは
透明板と金網あるいは穴あき金属板から成る覗き
窓である。５ｅは、第２図のようにドア５周縁部
に設けた電波減衰空胴６の入口７や周期構造体８
をカバーする誘電体カバーである。 FIG. 1 is a perspective view of essential parts showing an embodiment of the high-frequency heating device of the present invention. In the figure, 1 is a high-frequency oscillator that generates high-frequency energy, and 2 is a waveguide that connects the high-frequency oscillator 1 and the heating chamber 3.
4 is a flange provided on the front surface of the opening of the heating chamber 3, and this flange 4 has latches 5a, 5 provided on the door 5.
The latch insertion openings 4a and 4b, through which the latch openings 4a and 4b pass, are open. The latches 5a and 5b turn on/off the high frequency oscillator 1.
It controls the off state and maintains the closed state of the door 5. Reference numeral 5c denotes a door rear plate that makes plane contact with the flange 4 when the door 5 is closed, and is made of a metal plate. 5d is a viewing window made of a transparent plate and a wire mesh or a perforated metal plate. 5e indicates the entrance 7 of the radio wave attenuation cavity 6 and the periodic structure 8 provided at the periphery of the door 5 as shown in FIG.
This is a dielectric cover that covers the
第２図は第１図におけるドア５とフランジ４と
の平面接触部の断面拡大図である。ドア５周縁に
おいて基本波用チヨーク溝９と第２高周波用チヨ
ーク溝１０とを対向させて一つの入口７を持つ一
つの電波減衰空胴６を構成している。基本波用チ
ヨーク溝９では入口７から短絡面までの矢印で示
した電波伝搬経路９ａを加熱周波数の自由空間波
長λ0に対して約λ0／４としている。基本波用チヨ
ーク溝９を加熱室３に近い側に配置すると共に、
この溝９の一壁面であるドア後板５ｃをフランジ
４と平面接触（第２図ではわかりやすくするため
に故意に隙間を開けて図示している。）させてい
る。第２高周波用チヨーク溝１０では入口７から
短絡面までの矢印で示した電波伝搬経路１０ａを
約λ0／８としている。第２高周波用チヨーク溝１
０のフランジ４と対向する一壁面自体を根本８ａ
の幅が先端８ｂの幅よりも大きい台形状とする複
数の金属片から成る波板８（周期構造体）に分割
している（第３図参照）。この波板８は、加熱室
からフランジ４とドア後板５ｃとの隙間を通過し
た電波が点線の矢印１１のようにそのまま外部に
漏洩するのを防ぎ、電波減衰空胴６の基本波用チ
ヨーク溝９内へ能率よく導かれるように整合素子
として作用させるもので、根本８ａから先端８ｂ
までの長さは実験によると約λ0／12がよい。波板
８の先端８ｂには電波減衰空胴６の内部に向かつ
て折り曲げた突出面１２を設け、この突出面１２
とほぼ平行にドア後板５ｃの端部にも突出面１３
を設け、両突出面１２，１３の間の間隙をフラン
ジ４に直角な電波伝搬経路とすることにより、基
本波用チヨーク溝９および第２高周波用チヨーク
溝１０を共にフランジ４に対して直角な方向と平
行な方向から成る電波伝搬経路９ａ，１０ａとし
ている。前述のように両チヨーク溝９，１０の電
波伝搬経路９ａ，１０ａをそれぞれ約λ0／４、
λ0／８としており、かつフランジ４に対して直角
な方向と平行な方向とに屈曲させている。したが
つて、フランジ４と直角方向のドア５の厚みに対
応するＡ寸法、Ｂ寸法および電波減衰空胴６のフ
ランジ４と平行な方向の寸法Ｃを小さくすること
ができる。 FIG. 2 is an enlarged cross-sectional view of the planar contact portion between the door 5 and the flange 4 in FIG. 1. One radio wave attenuation cavity 6 having one entrance 7 is formed by opposing the fundamental wave groove 9 and the second high frequency wave groove 10 at the periphery of the door 5 . In the fundamental wave channel groove 9, the radio wave propagation path 9a shown by the arrow from the inlet 7 to the short-circuit surface is approximately λ 0 /4 with respect to the free space wavelength λ 0 of the heating frequency. While arranging the fundamental wave chiyoke groove 9 on the side closer to the heating chamber 3,
The door rear plate 5c, which is one wall surface of this groove 9, is brought into plane contact with the flange 4 (in FIG. 2, a gap is intentionally left open for clarity). In the second high-frequency channel groove 10, the radio wave propagation path 10a shown by the arrow from the inlet 7 to the short-circuit surface is approximately λ 0 /8. Second high frequency chiyoke groove 1
One wall surface facing the flange 4 of 0 is the base 8a.
The corrugated plate 8 (periodic structure) is divided into a plurality of trapezoidal metal pieces each having a width larger than that of the tip 8b (see FIG. 3). This corrugated plate 8 prevents the radio waves that have passed from the heating chamber through the gap between the flange 4 and the door rear plate 5c from leaking to the outside as shown by the dotted arrow 11, and prevents the radio waves from leaking to the outside as shown by the dotted arrow 11. It acts as a matching element so that it can be efficiently guided into the groove 9, and it is used as a matching element to guide the flow from the root 8a to the tip 8b.
According to experiments, a good length of about λ 0 /12 is desired. The tip 8b of the corrugated plate 8 is provided with a protruding surface 12 bent toward the inside of the radio wave attenuation cavity 6.
There is also a protruding surface 13 at the end of the door rear plate 5c approximately parallel to the
By providing a gap between both protruding surfaces 12 and 13 as a radio wave propagation path perpendicular to the flange 4, both the fundamental wave ch'yoke groove 9 and the second high frequency ch'yoke groove 10 are made perpendicular to the flange 4. The radio wave propagation paths 9a and 10a are parallel to the direction. As mentioned above, the radio wave propagation paths 9a and 10a of both the yoke grooves 9 and 10 are approximately λ 0 /4, respectively.
λ 0 /8, and is bent in a direction perpendicular to the flange 4 and in a direction parallel to it. Therefore, dimensions A and B corresponding to the thickness of the door 5 in the direction perpendicular to the flange 4 and dimension C of the radio wave attenuation cavity 6 in the direction parallel to the flange 4 can be reduced.
例えば、加熱周波数2450MHz（波長λ0＝122mm）
の高周波加熱装置において、本実施例の構成のド
アではＡが13mm、Ｂが16mm、Ｃが40mm程度で十分
実用に供せられることが実験で確認されており、
電波漏洩防止に要するドア５周縁部の空胴体積を
極めて小さく抑えることができる。 For example, heating frequency 2450MHz (wavelength λ 0 = 122mm)
It has been confirmed through experiments that in the high-frequency heating device of the present invention, A of 13 mm, B of 16 mm, and C of about 40 mm are sufficient for practical use in the door configured as in this example.
The empty space around the edge of the door 5 required to prevent radio wave leakage can be kept extremely small.
そのため、本実施例では、ドア５の外形寸法小
形化薄形化することができ、装置全体の外形寸法
に対する加熱室３の体積比率（スペースフアクタ
ー）の良好な高周波加熱装置が提供できる。これ
は、ビルトイン式、その他置き場所が狭い場合に
都合がよく、電子化された薄形のコントロールパ
ネル等にも適応しており、デザイン的にも有利で
ある。もちろん材料が少なくて済むので、コスト
的にも有利である。第３図に示すように、波板８
の先端８ｂを折り曲げて突出面１２を設け、この
突出面１２とドア５後板５ｃの端部の突出面１３
とをほぼ平行にして平面どうしを向かい合わせて
いる。このため、両平面１２，１３間の電界は局
部的に強くならない。したがつて、本実施例の周
期構造体付きのドア５は、ドア５後板５ｃとフラ
ンジ４との接触部、特に突出面１３の湾曲部付近
において空焼時に生じ易い高周波電磁界による異
常加熱やスパーク等の不都合を提言する作用があ
る。 Therefore, in this embodiment, the outer dimensions of the door 5 can be made smaller and thinner, and a high-frequency heating device with a good volume ratio (space factor) of the heating chamber 3 to the outer dimensions of the entire device can be provided. This is convenient for built-in types and other cases where space is limited, and it is also suitable for thin electronic control panels, which is advantageous in terms of design. Of course, since less material is required, it is also advantageous in terms of cost. As shown in FIG.
A protruding surface 12 is provided by bending the tip 8b of the door 5, and a protruding surface 13 at the end of the rear plate 5c of the door 5
The planes are facing each other with the planes almost parallel to each other. Therefore, the electric field between both planes 12 and 13 does not become locally strong. Therefore, the door 5 with the periodic structure of this embodiment is prevented from abnormal heating due to the high-frequency electromagnetic field that is likely to occur during dry firing in the contact area between the rear plate 5c of the door 5 and the flange 4, especially in the vicinity of the curved part of the protruding surface 13. It has the effect of recommending inconveniences such as sparks and sparks.
また、波板８は根本８ａの幅を先端８ｂの幅よ
りも大きい台形状としているため、波板８の強度
が大きく、変形による電波漏洩防止効果の低下も
防げる。 Further, since the corrugated plate 8 has a trapezoidal shape in which the width of the base 8a is larger than the width of the tip 8b, the strength of the corrugated plate 8 is large, and the deterioration of the radio wave leakage prevention effect due to deformation can be prevented.
さらに、第３図のようにラツチ５ａ，５ｂおよ
びその関連部品（図略）を収納する断面Ｕ字状の
金属板から成るラツチ収納部１４を電波減衰空胴
６の外側に設け、このラツチ収納部１４の入口１
４ａをフランジ４と対向させると共に第２高周波
用チヨーク溝１０の一壁面としている波板８と同
形状の波板８１で覆つている。波板８１は波板８
とは反対向きで、根本８１ａが先端８１ｂよりも
大きい台形状で、先端８１ｂにはラツチ収納部１
４の内部に向かつて折り曲げた突出面１２１が設
けてあり、この突出面１２１はラツチ収納部１４
の側壁１４ｂとほぼ平行になつている。波板はラ
ツチ５ａ，５ｂの突出部のみ除去している。第４
図は、波板８をドア周縁全周に設けかつラツチ収
納部１４を電波減衰空胴６の外側に取付けたもの
において、ドア後板５ｃとフランジ４との間隙
（ラツチ側）を横軸とし、波板８１をラツチ収納
部１４の入口１４ａに追加しない場合の電波漏洩
量に対する波板８１をラツチ収納部１４の入口１
４ａに追加した場合の電波漏洩量の比率を縦軸に
示したものである。例えば、間隙ゼロ（密閉）の
場合、取付寸法公差により接触部で部分的に0.2
〜0.5mm程度の間隙は避けられず、波板８１追加
前の電波漏洩量は0.035mW／cm2、波板８１追加
後は0.027mW／cm2で、比率は0.027／0.035＝0.77
となり、波板８１追加による電波漏洩量の減少効
果がある。ドア後板５ｃとフランジ４の間に２mm
厚さの低損失の誘電体片から成るスペーサをラツ
チ側に挾んで（ラツチのガタツキによる間隙は実
際は1.5mm以下）測定した場合、波板８１追加前
は1mW／cm2、追加後は0.25mW／cm2で、比率は
0.25／１＝0.25となり、波板８１を追加すること
により電波漏洩量は大幅に減少した。このように
ドア後板５ｃとフランジ４との間隙が大きくなつ
ても、波板８１を追加すると、電波漏洩量を小さ
く抑えられることが確認された。 Furthermore, as shown in FIG. 3, a latch storage section 14 made of a metal plate with a U-shaped cross section is provided outside the radio wave attenuation cavity 6 to store the latches 5a, 5b and related parts (not shown). Entrance 1 of section 14
4a is opposed to the flange 4 and is covered with a corrugated plate 81 having the same shape as the corrugated plate 8 which is one wall surface of the second high-frequency channel groove 10. The corrugated sheet 81 is the corrugated sheet 8
The base 81a is larger than the tip 81b and has a trapezoidal shape, and the tip 81b has a latch storage part 1.
A protruding surface 121 is provided which is bent toward the inside of the latch storage portion 14.
It is substantially parallel to the side wall 14b of. Only the protruding parts of the latches 5a and 5b are removed from the corrugated plate. Fourth
The figure shows a case in which a corrugated plate 8 is provided around the entire periphery of the door and a latch storage part 14 is attached to the outside of the radio wave attenuation cavity 6. , the amount of radio wave leakage when the corrugated plate 81 is not added to the entrance 14a of the latch housing 14
The vertical axis shows the ratio of radio wave leakage when added to 4a. For example, in the case of zero gap (sealed), 0.2
A gap of ~0.5mm is unavoidable, and the amount of radio wave leakage before adding corrugated plate 81 is 0.035mW/cm 2 , after adding corrugated plate 81 it is 0.027mW/cm 2 , and the ratio is 0.027/0.035 = 0.77
Therefore, the addition of the corrugated plate 81 has the effect of reducing the amount of radio wave leakage. 2mm between door rear plate 5c and flange 4
When measuring with a spacer made of a thin, low-loss dielectric piece placed on the latch side (the gap due to rattling of the latch is actually less than 1.5 mm), the reading was 1 mW/cm 2 before adding the corrugated plate 81 and 0.25 mW after adding it. /cm 2 , and the ratio is
0.25/1=0.25, and by adding the corrugated plate 81, the amount of radio wave leakage was significantly reduced. It has been confirmed that even if the gap between the door rear plate 5c and the flange 4 becomes large as described above, the amount of radio wave leakage can be kept small by adding the corrugated plate 81.
したがつて、ドア５とフランジ４との接触面の
平面度が悪く接触面に不規則な隙間があいた場合
でも、波板８１をラツチ収納部１４の入口１４ａ
に追加することにより電波漏洩量を小さく抑える
ことができる。このように波板８１を追加して
も、波板８１を追加しない場合とドアの外形寸法
は変わらず、前述のスペースフアクターの良好な
高周波加熱装置を提供する等の効果も保持する。
また、波板８１の先端８１ｂはドア５の最外周壁
（ラツチ収納部１４の側壁１４ｂ）と平面どうし
で対向しており、かつ電波減衰空胴６を通過した
微少電波しか到達しないので、高周波電磁界によ
るスパークや異常加熱は発生しない。ラツチ５
ａ，５ｂを収納すると共に入口１４ａを波板８１
で覆つたラツチ収納部１４を別体としたことによ
り、ラツチ５ａ，５ｂそのものもしくはラツチ５
ａ，５ｂに関連する小物部品（図略）の取付作業
性がよいため、ラツチ５ａ，５ｂの取付精度の向
上が図れ、かつ作業場のスペースも小さくするこ
とができるという利点がある。さらに、ラツチ収
納部１４を断面Ｕ字状の金属板から構成している
ため、機械的強度が大きい。このラツチ収納部１
４をドア５の電波減衰空胴６の外側に取付けるこ
とにより、ドア５の機械的強度が増大する。その
ため、ドア開閉時等に外力が繰り返し掛かつて
も、ドア５の変形が防止でき、長期間に亘つて安
定した電波シール効果を保持できる。 Therefore, even if the flatness of the contact surface between the door 5 and the flange 4 is poor and irregular gaps are formed on the contact surface, the corrugated plate 81 can be inserted into the entrance 14a of the latch storage section 14.
By adding this, the amount of radio wave leakage can be kept small. Even if the corrugated plate 81 is added in this manner, the external dimensions of the door remain the same as in the case where the corrugated plate 81 is not added, and the effect of providing a good high-frequency heating device for the space factor described above is also maintained.
In addition, the tip 81b of the corrugated plate 81 faces the outermost peripheral wall of the door 5 (the side wall 14b of the latch storage portion 14) on a plane-to-plane basis, and only minute radio waves that have passed through the radio wave attenuation cavity 6 reach, so that high frequency No sparks or abnormal heating will occur due to electromagnetic fields. Latch 5
a, 5b, and the entrance 14a is made of a corrugated plate 81.
By making the latch storage part 14 covered with
Since small parts (not shown) related to latches a and 5b can be easily attached, there are advantages in that the accuracy in attaching latches 5a and 5b can be improved and the work space can be reduced. Furthermore, since the latch housing portion 14 is constructed from a metal plate having a U-shaped cross section, it has high mechanical strength. This latch storage compartment 1
4 outside the radio wave attenuation cavity 6 of the door 5, the mechanical strength of the door 5 is increased. Therefore, deformation of the door 5 can be prevented even if external force is repeatedly applied when the door is opened and closed, and a stable radio wave sealing effect can be maintained for a long period of time.
以上のように、本発明によると、簡単な構成に
より、外形寸法が小さく、ラツチの取付作業性が
よく、ドアの機械的強度が増大して長期間の使用
に耐え、異常加熱やスパークが発生しにくく、か
つドアと加熱室開口部前面のフランジとの接触部
の平面度が悪い場合でも電波漏洩量を少なく抑え
られる周期構造体付きのドアを備えた高周波加熱
装置を提供することができる。 As described above, the present invention has a simple structure, small external dimensions, good latch installation workability, increased mechanical strength of the door, can withstand long-term use, and prevents abnormal heating and sparks. It is possible to provide a high-frequency heating device equipped with a door with a periodic structure that is difficult to clean and can suppress the amount of radio wave leakage to a small level even when the flatness of the contact portion between the door and the flange on the front surface of the heating chamber opening is poor.
第１図は本発明の高周波加熱装置の一実施例を
示す要部斜視図、第２図は第１図におけるドア３
とフランジ４との平面接触部の断面拡大図、第３
図は同誘電体カバー５ｅを除去してドア３の内側
を上方斜めから見た斜視図、第４図はラツチ収納
部１４の入口１４ａに波板８１を追加した場合の
電波漏洩防止効果を示すグラフである。
１…高周波発振器、３…加熱室、４…フラン
ジ、５…ドア、５ａ，５ｂ…ラツチ、６…電波減
衰空胴、７…電波減衰空胴６の入口、８，８１…
波板、９…基本波用チヨーク溝、１０…第２高調
波用チヨーク溝、１４…ラツチ収納部、１４ａ…
ラツチ収納部１４の入口。
FIG. 1 is a perspective view of essential parts showing an embodiment of the high-frequency heating device of the present invention, and FIG. 2 is a door 3 in FIG. 1.
Enlarged cross-sectional view of the planar contact portion between the flange 4 and the flange 4, 3rd
The figure is a perspective view of the inside of the door 3 seen diagonally from above with the dielectric cover 5e removed, and FIG. It is a graph. DESCRIPTION OF SYMBOLS 1... High frequency oscillator, 3... Heating chamber, 4... Flange, 5... Door, 5a, 5b... Latch, 6... Radio wave attenuation cavity, 7... Entrance of radio wave attenuation cavity 6, 8, 81...
Corrugated plate, 9... Choyok groove for fundamental wave, 10... Cheokyoke groove for second harmonic, 14... Latch storage part, 14a...
Entrance of latch storage section 14.
Claims (1)
用チヨーク溝と第２高周波用チヨーク溝とを互い
に向かい合わせて一つの入口を持つ一つの電波減
衰空胴を構成し、かつ上記第２高周波用チヨーク
溝の加熱室開口部のフランジと対向する壁面を複
数の先端を折り曲げた台形状金属片から成る波板
８で形成し、高周波発振器のオン・オフを制御す
るほかドアの密閉状態を保持するためのラツチを
収納する断面Ｕ字状の金属板から成るラツチ収納
部１４を上記電波減衰空胴の外側に設け、このラ
ツチ収納部１４の入口１４ａを加熱室開口部のフ
ランジと対向させると共に、上記波板８と同形状
でかつ反対向きにラツチ収納部１４の入口１４ａ
を覆う波板８１を追加し、この波板８１の先端８
１ｂを折り曲げて形成した突出面１２１をラツチ
収納部１４の最外周の側壁１４ｂと対向するよう
に配設したことを特徴とする高周波加熱装置。1. A radio wave attenuation cavity having a single entrance is formed by arranging a fundamental wave groove and a second high frequency wave groove facing each other on the peripheral edge of the door that seals the opening of the heating chamber, and The wall surface facing the flange of the heating chamber opening of the high-frequency chiyoke groove is formed by a corrugated plate 8 made of a trapezoidal metal piece with multiple bent ends, which controls the on/off of the high-frequency oscillator and also controls the sealing state of the door. A latch housing part 14 made of a metal plate having a U-shaped cross section and housing a latch for holding is provided outside the radio wave attenuation cavity, and the entrance 14a of this latch housing part 14 is opposed to the flange of the opening of the heating chamber. In addition, there is an entrance 14a of the latch storage portion 14 having the same shape as the corrugated plate 8 and facing in the opposite direction.
A corrugated plate 81 is added to cover the tip 8 of this corrugated plate 81.
A high-frequency heating device characterized in that a protruding surface 121 formed by bending the latch accommodating portion 14 is disposed to face the outermost side wall 14b of the latch storage portion 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7628082A JPS58194290A (en) | 1982-05-07 | 1982-05-07 | High frequency heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7628082A JPS58194290A (en) | 1982-05-07 | 1982-05-07 | High frequency heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58194290A JPS58194290A (en) | 1983-11-12 |
| JPH0129040B2 true JPH0129040B2 (en) | 1989-06-07 |
Family
ID=13600866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7628082A Granted JPS58194290A (en) | 1982-05-07 | 1982-05-07 | High frequency heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58194290A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2017163799A1 (en) | 2016-03-25 | 2019-01-31 | パナソニックＩｐマネジメント株式会社 | High frequency heating device |
-
1982
- 1982-05-07 JP JP7628082A patent/JPS58194290A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58194290A (en) | 1983-11-12 |
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