JPH0125438Y2 - - Google Patents

Description

【考案の詳細な説明】[Detailed explanation of the idea]

本考案は例えば、いわゆるオーブンレンジ等の
扉構成に関するもので、その目的とするところ
は、高い気密性を持ち、設定温度への立ち上がり
時間の早い、かつ電波漏洩が少なく安全性の高い
調理機器を安価に提供することにある。 従来、高周波加熱装置いわゆる電子レンジは、
加熱室前板とそれに対向して設けられた扉のシー
ル板との密着により高周波の漏洩を防ぐと共に、
加熱室内部で発生した水蒸気や熱気の加熱室外へ
の流出を防いでいる。しかしながら電子レンジに
オーブン機能やグリル機能、スチーム機能などを
附加した複合商品が業界の主流になりつつある現
在、かなり高温となつた熱気や水蒸気、煙などが
加熱室前板と扉のシール板とのスキマから外部へ
流出した場合、扉構成部品をはじめとする各部は
高温となり、使用者にやけどの危険性が高くな
り、水蒸気の場合は、周囲に付着し操作部でくも
り等が発生し使い勝手の面で不都合が生じる。
又、当然各部品の耐熱性の向上が必要となり、品
質面・コスト面で大きな障害となつて来ることが
考えられる。ごく最近では、強制熱風循環式のオ
ーブンレンジが市場に多く出回つている。この熱
風式の場合は、従来のオーブンレンジと加熱室内
部の圧力を比較した場合、増大する傾向にあるこ
とが考えられ、当然加熱室内部の高温化した空気
は、圧力の低い外部へ、加熱室と扉との隙間から
流出する現象が起こつて来る。この場合、庫内の
設定温度に対する立ち上がり時間もその分だけ遅
くなり、調理時間も長くなりエネルギーのロスが
大きくなる。 このような理由から、一部の製品には、扉側か
加熱室のどちらかに熱気・蒸気シール用のゴム部
品を装着したものがあることは知られている。こ
の実施例の断面形状図を第１図に示す。電波シー
ル板１とその外側に設けられた電波減衰溝２を形
成する扉枠体３との間には、耐熱性ゴムにより形
成された気体シール部品４が装着されている。扉
を閉じた時、電波シール板１と加熱室前板（図示
せず）とは密着状態に位置し合う。この時、気体
シール部品４の突出部Ａは加熱室前板５に押され
て電波減衰溝２の内部へ押し込まれる。この状態
を第２図に示す。第１図から第２図の状態にする
為には気体シール部品４を圧縮させる方向に力を
必要とする為、かなり大きな扉閉め力を要す上、
閉めてからも気体シール部品４が常に加熱室前板
を強く押していることから、電波シール板１と加
熱室前板５は完全に密着しにくくなり、その結
果、電波漏洩防止手段の１つ、いわゆる“キヤパ
シチイブ・シール”に悪影響をおよぼすものであ
つた。又、この反発力を小さいものにする為に
は、図からも解かる様に、圧縮される方向の距離
を長くとることが必要となり、その結果部品自体
が大きなものとなり、材料費の面でもかなり高い
ものになつていた。 本考案はこの様な欠点を改善するもので、以
下、本考案の１実施例を添付図面に基づいて説明
する。 第３図は本考案によるところの気体シール部品
の断面形状図である。第４図はこの部品を扉に組
み込んだ状態の扉断面図である。第４図で、扉３
が閉まつて行き、加熱室前板が耐熱ゴムからなる
気体シール部品４の突出した中空部６に当たると
中空部６はその支持部７の根元部８を中心にした
形で変形し始める。この支持部７は薄肉になつて
いる上に、これを曲げる方向に力が働く為変形し
やすく、中空部６は小さな力で扉３の電波減衰溝
２の中に落ち込む。当然、加熱室前板（図示せ
ず）を押し返す力も小さい為、電波シール板１と
加熱室前板は完全に密着するので、扉外部への電
波漏洩に対する悪影響は全くというほどなくな
る。又、何らかの原因でこの気体シール部品４の
支持部７が変形しない場合でも、本実施例によれ
ば、加熱室前板５との接触部である中空部６は、
薄肉な構成となつているのでこの部品４が加熱室
前板５を押し、その結果扉３全体を開こうとする
力は極めて小さいものになつた。この時、この気
体シール部品４の反発力が全くなくなると、本来
の目的であるシール性能が問題となるが、気体シ
ール部品の成形技術的な面で薄肉にも限界があ
り、変形させながらこれ以上反発力を更に小さく
することには無理があるように思われる。したが
つて、シール性の面からこの反発力は小さすぎて
も良くないので、本考案によるところの形状であ
れば、中空部６と支持部７は最小肉薄である0.5
mm程度が最適と考えられる。 ここにこの気体シール部品の有無の扉周囲の電
波漏洩と熱気シール効果の実験結果の一部を掲載
する。 For example, this invention relates to the door structure of a so-called microwave oven, etc., and its purpose is to create a highly safe cooking appliance that is highly airtight, has a quick rise time to the set temperature, and has little radio wave leakage. The aim is to provide it at a low price. Conventionally, high-frequency heating devices, so-called microwave ovens,
The close contact between the front plate of the heating chamber and the seal plate of the door installed opposite it prevents leakage of high frequency waves, and
This prevents water vapor and hot air generated inside the heating chamber from flowing out of the heating chamber. However, now that microwave ovens with oven functions, grill functions, steam functions, etc. have been added to composite products that have become mainstream in the industry, extremely high-temperature hot air, steam, smoke, etc. If water vapor leaks to the outside from the gap, the door components and other parts will become hot, increasing the risk of burns to the user.If water vapor leaks out from the gap, the door components and other parts will become hot, increasing the risk of burns to users. This causes inconvenience in terms of
Moreover, it is naturally necessary to improve the heat resistance of each component, which may become a major obstacle in terms of quality and cost. Recently, many microwave ovens with forced hot air circulation have appeared on the market. In the case of this hot air type, when comparing the pressure inside the heating chamber with that of a conventional microwave oven, it is thought that the pressure inside the heating chamber tends to increase, and naturally the high temperature air inside the heating chamber is transferred to the outside where the pressure is low. A phenomenon occurs where water flows out from the gap between the room and the door. In this case, the rise time to the set temperature inside the refrigerator will be delayed accordingly, the cooking time will also be longer, and energy loss will be greater. For this reason, it is known that some products are equipped with rubber parts for hot air/steam sealing either on the door side or in the heating chamber. A cross-sectional view of this embodiment is shown in FIG. A gas seal component 4 made of heat-resistant rubber is installed between the radio wave seal plate 1 and a door frame 3 forming a radio wave attenuation groove 2 provided on the outside thereof. When the door is closed, the radio wave sealing plate 1 and the heating chamber front plate (not shown) are in close contact with each other. At this time, the protrusion A of the gas seal component 4 is pushed by the heating chamber front plate 5 and pushed into the radio wave attenuation groove 2 . This state is shown in FIG. In order to change the state from FIG. 1 to FIG. 2, a force is required in the direction of compressing the gas seal component 4, which requires a considerably large door closing force.
Since the gas sealing part 4 always strongly presses the heating chamber front plate even after closing, it becomes difficult for the radio wave sealing plate 1 and the heating chamber front plate 5 to come into complete contact with each other, and as a result, one of the radio wave leakage prevention means, This had an adverse effect on the so-called "capacitive seal." In addition, in order to reduce this repulsive force, as can be seen from the figure, it is necessary to increase the distance in the direction of compression, which results in the parts themselves becoming larger, which also reduces material costs. It had become quite expensive. The present invention aims to improve these drawbacks, and one embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 3 is a sectional view of the gas seal component according to the present invention. FIG. 4 is a sectional view of the door with this part assembled into the door. In Figure 4, door 3
is closed, and when the heating chamber front plate hits the protruding hollow part 6 of the gas sealing part 4 made of heat-resistant rubber, the hollow part 6 begins to deform around the root part 8 of the support part 7. This support part 7 is thin, and is easily deformed because a force acts in the direction of bending it, and the hollow part 6 falls into the radio wave attenuation groove 2 of the door 3 with a small force. Naturally, since the force pushing back the heating chamber front plate (not shown) is small, the radio wave sealing plate 1 and the heating chamber front plate are in complete contact with each other, so that there is almost no adverse effect on radio wave leakage to the outside of the door. Furthermore, even if the support portion 7 of the gas seal component 4 is not deformed for some reason, according to this embodiment, the hollow portion 6 that is the contact portion with the heating chamber front plate 5 is
Since it has a thin structure, this part 4 pushes the front plate 5 of the heating chamber, and as a result, the force required to open the door 3 as a whole becomes extremely small. At this time, if the repulsive force of the gas seal component 4 is completely lost, the sealing performance, which is the original purpose, becomes a problem, but there is a limit to the thinness of the gas seal component due to the molding technology, so it can be It seems impossible to further reduce the repulsive force as described above. Therefore, from the standpoint of sealing performance, it is not good for this repulsive force to be too small, so if the shape is according to the present invention, the hollow part 6 and the supporting part 7 have a minimum thickness of 0.5
Approximately mm is considered optimal. Here we present some of the experimental results of radio wave leakage and hot air sealing effects around doors with and without this gas sealing component.

【表】 以上の様に本考案によれば気体シール用ゴム部
品を装着した扉であつても、扉を閉めた状態での
扉を開こうとする反発力が小さい為、電波漏洩が
増えることが殆んどなく、安全である上、加熱室
のシール性が大巾に改善されるので設定温度への
立ち上がり時間も早いので省エネルギーであるこ
と、又、扉周囲部品に高温化した熱気や蒸気が洩
れないので、扉周囲部品の耐熱性も不要となるの
で、品質面・コスト面での効果も大きい。又本部
品は、中空部を有するので、押し出し成形加工と
なり、金型費用も安く、部品単価も小さく出来
る。更には、扉を閉めた状態の時、反発力が小さ
いので、従来品（シール用ゴム部品装着品）の様
な、扉のガタつきもなく開閉操作時の感触も良い
など価値の高いものを提供するものである。[Table] As described above, according to the present invention, even if the door is equipped with a rubber part for gas sealing, the repulsive force to open the door is small when the door is closed, so radio wave leakage increases. Not only is it safe with almost no heat, the sealing performance of the heating chamber is greatly improved, so the temperature rises quickly to the set temperature, which saves energy. Since there is no leakage, there is no need for heat-resistant parts around the door, which has great effects in terms of quality and cost. Also, since this part has a hollow part, it can be extruded and molded, and the mold cost is low and the unit price of the part can be reduced. Furthermore, when the door is closed, the repulsive force is small, so unlike conventional products (equipped with rubber sealing parts), the door does not rattle and has a good feel when opening and closing, making it a valuable product. This is what we provide.

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

第１図は従来例の扉断面、第２図は同扉を閉じ
た状態を示す断面図、第３図は本考案による気体
シール部品の断面図、第４図はそれを装着した扉
の断面図、第５図は同扉正面図、第６図は第５図
におけるＣ−Ｃ断面図である。 １……電波シール板、４……気体シール部品、
５……加熱室前板、９……チヨークカバー。 Figure 1 is a cross-sectional view of the conventional door, Figure 2 is a cross-sectional view of the door when it is closed, Figure 3 is a cross-sectional view of the gas seal component of the present invention, and Figure 4 is a cross-sectional view of the door equipped with it. 5 is a front view of the same door, and FIG. 6 is a sectional view taken along line CC in FIG. 5. 1...Radio wave seal plate, 4...Gas seal parts,
5...Heating chamber front plate, 9...Chiyoke cover.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 調理物を加熱する加熱室とその開口部に対向し
て開閉自在に設けられた扉とを有する調理装置に
おいて、扉の加熱室前板と対向して設けられた電
波シール板の周囲に耐熱ゴムから成り、その断面
形状に薄肉の中空部を有し、この中空部は、加熱
室前板および扉電波シール板と略平行部をもつ薄
肉の支持部により支持された気体シール用部品を
装着した高周波加熱装置。 In a cooking device that has a heating chamber that heats food and a door that can be opened and closed opposite the opening of the heating chamber, heat-resistant rubber is installed around the radio wave seal plate that is installed opposite the front plate of the heating chamber of the door. It has a thin-walled hollow part in its cross-sectional shape, and this hollow part is equipped with a gas sealing part supported by a thin-walled support part having a part substantially parallel to the heating chamber front plate and the door radio wave sealing plate. High frequency heating device.