JP3326306B2 - Draft chamber - Google Patents
Draft chamberInfo
- Publication number
- JP3326306B2 JP3326306B2 JP16518395A JP16518395A JP3326306B2 JP 3326306 B2 JP3326306 B2 JP 3326306B2 JP 16518395 A JP16518395 A JP 16518395A JP 16518395 A JP16518395 A JP 16518395A JP 3326306 B2 JP3326306 B2 JP 3326306B2
- Authority
- JP
- Japan
- Prior art keywords
- processing chamber
- main body
- control plate
- inclined surface
- inclination angle
- 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 - Lifetime
Links
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- Ventilation (AREA)
- Devices For Use In Laboratory Experiments (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、化学実験等に使用する
ドラフトチャンバーの改良に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a draft chamber used for a chemical experiment or the like.
【０００２】[0002]
【従来の技術】ドラフトチャンバーは、箱状に形成した
本体の前面を開口して内部を処理室と成し、処理室内の
空気を、本体の上面に接続したダクトから外部に排気す
るようにしており、排気によって処理室に外気が流入す
る。この場合、空気の流れには直進性があるため、単に
本体の前面を開口したに過ぎない形態では、処理室の底
面のうち前端部が吸引風の通らないよどみ部となって、
この部分に渦流が発生し、このため処理室の底面箇所で
発生した有毒ガスの排気が不十分になることがあった。2. Description of the Related Art A draft chamber has a processing chamber formed by opening a front surface of a box-shaped main body, and air inside the processing chamber is exhausted to the outside through a duct connected to an upper surface of the main body. The outside air flows into the processing chamber due to the exhaust. In this case, since the flow of air is straight, the front end of the bottom surface of the processing chamber is a stagnation section through which suction air does not pass, in a form in which the front surface of the main body is simply opened.
A vortex was generated in this portion, and as a result, exhaust of toxic gas generated at the bottom of the processing chamber was sometimes insufficient.
【０００３】そこで、例えば米国特許第4,023,473 号明
細書に記載され且つ図５に示すように、本体２１におけ
る開口部２２の下部に、吸引風が処理室２３の底面２４
を這って流れるようにガイドするための制御板（エアロ
・フォイル：air foil）２５を間口方向に沿って延びる
ように設けることが行われている。この場合、制御板２
５は下向き凹状に湾曲した形状に形成している。符号２
６は扉である。Therefore, as described in, for example, US Pat. No. 4,023,473 and shown in FIG. 5, a suction wind blows a bottom 24 of a processing chamber 23 below an opening 22 in a main body 21.
A control plate (aero foil) 25 for guiding the air to crawl and flow is provided so as to extend along the frontage direction. In this case, the control plate 2
5 is formed in a downwardly curved shape. Sign 2
6 is a door.
【０００４】[0004]
【発明が解決しようとする課題】しかし、図５のように
単に制御板２５を設けたに過ぎない構成では、本体２１
の前面に沿って上向きに吸引された吸引風はその直進性
によって斜め上向き方向に流れる傾向を呈するため、吸
引風が処理室２３の底面２４を這って流れるようにガイ
ドする機能が弱く、換言すると、処理室２３における底
面２４の先端縁の箇所で渦流Ｗ（よどみ）が生じること
を効果的に抑制できず、このため、処理室２３の底面２
４で発生した有害ガスの迅速な排出機能が十分でないと
言う問題があった。However, in the configuration in which the control plate 25 is merely provided as shown in FIG.
Since the suction wind sucked upward along the front surface of the processing chamber has a tendency to flow obliquely upward due to its straightness, the function of guiding the suction wind to flow along the bottom surface 24 of the processing chamber 23 is weak, in other words, In addition, the generation of the vortex W (stagnation) at the front edge of the bottom surface 24 in the processing chamber 23 cannot be effectively suppressed.
There was a problem that the function of quickly discharging the harmful gas generated in 4 was not sufficient.
【０００５】また、図５のように制御板２５を下向き凹
状に湾曲した形状に形成すると、制御板２５の曲がりが
大きいため、制御板２５の内面の箇所や上面の箇所で吸
引風が素通りしてしまって渦流Ｗが発生しやすくなり、
この点からも効果的な排気が十分でなかった。本発明
は、排気機能を向上すべく、吸引風を処理室の底面に沿
って効果的に流すことができるようにしたドラフトチャ
ンバーを提供することを目的とするものである。When the control plate 25 is formed in a downwardly concave shape as shown in FIG. 5, since the control plate 25 is largely bent, the suction air passes through the inner surface of the control plate 25 and the upper surface thereof. Eddy currents W are likely to occur,
From this point, effective exhaust was not enough. SUMMARY OF THE INVENTION It is an object of the present invention to provide a draft chamber capable of effectively flowing suction air along a bottom surface of a processing chamber in order to improve an exhaust function.
【０００６】[0006]
【課題を解決するための手段】この目的を達成するため
本発明は、「前面に開口部を形成して内部を処理室と成
した本体に、前記処理室内の気体を外部に排出するため
の排気手段を設け、前記開口部の下部には、前記排気手
段による吸引風が処理室の底面に沿って流れるようにガ
イドするための制御板を、処理室の底面と隙間を隔てた
状態で開口部の間口方向に沿って延びるように設けて成
るドラフトチャンバーにおいて、前記本体の前面のうち
開口部の下端縁に沿って延びる部位を、処理室の奥方向
に向けて倒れるように傾斜した傾斜面に形成する一方、
前記制御板を、前記処理室の奥方向に向けて徐々に高さ
が高くなるように傾斜した傾斜部と、該傾斜部の後端に
連接した水平状部とで側面視く字状に形成して、前記傾
斜部を前記本体における傾斜面の上方に位置せしめ、更
に、前記本体の傾斜面が水平面と成す傾斜角度を、制御
板の傾斜部が水平面と成す傾斜角度よりも大きい角度に
設定する」の構成にした。In order to achieve this object, the present invention provides a method for discharging a gas in a processing chamber to a main body having an opening formed in a front surface and forming an inside thereof as a processing chamber. An exhaust means is provided, and a control plate for guiding the air drawn by the exhaust means to flow along the bottom surface of the processing chamber is opened at a lower portion of the opening with a gap between the control plate and the bottom surface of the processing chamber. A draft chamber provided so as to extend along the frontage direction of the section, a portion extending along the lower edge of the opening in the front surface of the main body, and an inclined surface inclined so as to fall down in the depth direction of the processing chamber. While forming
The control plate is formed in an oblique shape in a side view with an inclined portion inclined so as to gradually increase in height toward a depth direction of the processing chamber and a horizontal portion connected to a rear end of the inclined portion. Then, the inclined portion is positioned above the inclined surface of the main body, and further, the inclination angle formed by the inclined surface of the main body with the horizontal plane is set to an angle larger than the inclination angle formed by the inclined portion of the control plate with the horizontal plane. Yes "configuration.
【０００７】この場合、本願発明者の実験によると、制
御板の傾斜角度を２０〜３０度程度とし、本体の傾斜面
の傾斜角度を６０度程度に設定するのが好ましかった。In this case, according to an experiment conducted by the inventor of the present invention, it was preferable to set the inclination angle of the control plate to about 20 to 30 degrees and the inclination angle of the inclined surface of the main body to about 60 degrees.
【０００８】[0008]
【発明の作用・効果】このように構成すると、制御板と
本体との間の隙間から処理室内に空気が流入するにおい
て、本体の前面に沿って流れる吸引風は、本体の傾斜面
に沿って斜め上向きに流れたのち、処理室の底面の前端
縁と制御板の水平状部との間の隙間の箇所で風向を水平
方向に変えられて、処理室内に流入する。According to this structure, when air flows into the processing chamber from the gap between the control plate and the main body, the suction air flowing along the front surface of the main body flows along the inclined surface of the main body. After flowing obliquely upward, the wind direction is changed in the horizontal direction at the gap between the front edge of the bottom surface of the processing chamber and the horizontal portion of the control plate, and flows into the processing chamber.
【０００９】この場合、本体の前面に沿って流れる吸引
風の風向は傾斜面によって斜め上向き方向に向かうよう
にガイドされているから、制御板の水平状部と本体との
間の箇所で風向を水平方向に変換させることがスムース
に行われる。つまり、本体の前面に沿って流れる吸引風
が水平方向に風向を変えるに際しての変更角度が小さく
から、水平方向への風向の変更がスムースに行われる。In this case, the wind direction of the suction air flowing along the front surface of the main body is guided by the inclined surface so as to be directed obliquely upward, so that the wind direction is adjusted at a position between the horizontal portion of the control plate and the main body. The conversion in the horizontal direction is performed smoothly. That is, since the angle of change when the suction wind flowing along the front surface of the main body changes the wind direction in the horizontal direction is small, the change in the wind direction in the horizontal direction is performed smoothly.
【００１０】また、本体の傾斜面の傾斜角度よりも制御
板の傾斜部の傾斜角度を小さくしたことにより、本体の
傾斜面と制御板の傾斜部との間の間隔は吸引風の進行方
向に向けて狭まるから、制御板と本体との間から処理室
内に流れる吸引風は、オリフィス効果によって流速が速
められて処理室に流入する。従って、制御板と本体との
間の隙間から処理室に流れ込む吸引風は、その流速を速
めた状態で、水平方向に向かうようにスムースに風向が
変換されるのであり、これにより、制御板と本体との間
から処理室内に流入した吸引風は、処理室における底面
の前端縁の箇所で渦流を全く又は殆ど発生させることな
く処理室の底面に沿って流れることになり、その結果、
処理室の底面で発生した有害ガスを効果的に排気できる
のである。Further, by making the inclination angle of the inclined portion of the control plate smaller than the inclination angle of the inclined surface of the main body, the interval between the inclined surface of the main body and the inclined portion of the control plate is set in the direction of the suction wind. The suction air flowing into the processing chamber from between the control plate and the main body flows into the processing chamber at an increased flow rate due to the orifice effect. Therefore, the suction air flowing into the processing chamber from the gap between the control plate and the main body is smoothly converted in the horizontal direction in a state where the flow velocity is increased, whereby the control plate and the control plate are connected to each other. The suction air that has flowed into the processing chamber from between the main body will flow along the bottom surface of the processing chamber without generating any or almost no vortex at the front edge of the bottom surface in the processing chamber.
The harmful gas generated at the bottom of the processing chamber can be effectively exhausted.
【００１１】更に、本体の前面を傾斜面に形成したこと
により、制御板における傾斜部の傾斜角度を例えば２０
度程度の緩い角度に設定した状態であっても吸引風が水
平方向に向かうようにガイドできるから、制御板の下面
の箇所又は上面の箇所に渦流が発生することもなく、こ
の点においても排気機能を向上できる。また、請求項２
のように本体の傾斜面にスイッチ類やコック類、表示盤
等の操作設備を設けると、これら操作設備を制御板で保
護できることに加えて、操作設備が上向きになることに
よって扱い易く且つ見やすくなるので、ドラフトチャン
バーの使い勝手を向上できる利点がある。Further, the front surface of the main body is formed as an inclined surface, so that the inclination angle of the inclined portion of the control plate can be set to, for example, 20 degrees.
Even if the angle is set to a gentle angle, the suction air can be guided in the horizontal direction.Therefore, no vortex is generated on the lower surface or upper surface of the control plate. Function can be improved. Claim 2
When operating devices such as switches, cocks, and a display panel are provided on the inclined surface of the main body as described above, in addition to being able to protect these operating devices with a control board, the operating devices are upwardly oriented, so that they are easy to handle and view. Therefore, there is an advantage that the usability of the draft chamber can be improved.
【００１２】[0012]
【実施例】次に、本発明の実施例を図面に基づいて説明
する。図１及び図２は第１実施例であり、このうち図１
はドラフトチャンバー１の斜視図、図２（Ａ）は図１の
IIＡ−IIＡ視断面図、図２（Ｂ）は図２の要部拡大図で
ある。Next, an embodiment of the present invention will be described with reference to the drawings. 1 and 2 show a first embodiment, of which FIG.
1 is a perspective view of the draft chamber 1, and FIG.
FIG. 2B is a cross-sectional view taken along the line IIA-IIA, and FIG.
【００１３】ドラフトチャンバー１は、前面を大きく開
口して内部を処理室３と成した本体２を備えている（開
口部を符号４で示す）。本体２の開口部４には扉５を上
下動自在に装着しており、また、本体２の上面には排気
手段の一例としての排気ダクト６を接続している。処理
室３の底面を構成する底板７は耐蝕性素材で形成してお
り、底板７の上面（処理室３の底面）には薬品類の流れ
出ないように凹所７ａを形成している。The draft chamber 1 is provided with a main body 2 having a large opening at the front surface and a processing chamber 3 at the inside (the opening is indicated by reference numeral 4). A door 5 is attached to the opening 4 of the main body 2 so as to be movable up and down, and an exhaust duct 6 as an example of exhaust means is connected to an upper surface of the main body 2. The bottom plate 7 constituting the bottom surface of the processing chamber 3 is formed of a corrosion-resistant material, and a concave portion 7a is formed on the upper surface of the bottom plate 7 (the bottom surface of the processing chamber 3) so that chemicals do not flow out.
【００１４】処理室３のうち本体２の背面寄り部位に
は、処理室３の下面と中途高さ部位とに開口したバイパ
ス通路８を形成しており、これにより、処理室３の奥か
らのガスの吸引を効果的に行えるようにしている。本体
２の下部には扉付きの収納台９を設けている。処理室３
の底面には薬品類が流れ出ないように凹所７ａが形成さ
れている。In the processing chamber 3, a portion of the processing chamber 3 near the back of the main body 2 is formed with a bypass passage 8 which is open to the lower surface of the processing chamber 3 and an intermediate height portion. The gas can be effectively sucked. At the lower part of the main body 2, a storage table 9 with a door is provided. Processing room 3
A concave portion 7a is formed on the bottom surface of the substrate so that chemicals do not flow out.
【００１５】本体２の前面のうち開口部４の下端縁に沿
って延びる部位は、処理室３の奥に向けて倒れるように
傾斜した傾斜面２ａに形成されており、この傾斜面２ａ
に、電源や照明灯等の電気器具のスイッチ類や、水道や
ガスのコック、或いは各種表示灯等の操作設備１０を設
けている。前記傾斜面２ａと水平面との成す角度θ１は
６０度程度に設定している。A portion of the front surface of the main body 2 extending along the lower edge of the opening 4 is formed on an inclined surface 2a which is inclined so as to fall toward the interior of the processing chamber 3, and the inclined surface 2a
In addition, there are provided switches 10 for electric appliances such as a power supply and a lighting lamp, a tap for water and gas, and operation equipment 10 such as various display lamps. The angle θ1 between the inclined surface 2a and the horizontal plane is set to about 60 degrees.
【００１６】開口部４の下部には、制御板１１を、処理
室３の底板７と若干の隙間を空けた状態で間口方向の全
長に延びるように配設している。この制御板１１は、本
体２の手前側に向けて前傾した傾斜部１１ａと、該傾斜
部１１ａの後端から後ろ向きに延びる水平状部１１ｂと
で断面く字状に形成されており、傾斜部１１ａが前記本
体２における傾斜面２ａの上方に位置するように設定し
ている。A control plate 11 is provided below the opening 4 so as to extend the entire length in the frontage direction with a slight gap from the bottom plate 7 of the processing chamber 3. The control plate 11 is formed in a rectangular shape in cross section by an inclined portion 11a inclined forward toward the front side of the main body 2 and a horizontal portion 11b extending rearward from the rear end of the inclined portion 11a. The portion 11a is set so as to be located above the inclined surface 2a of the main body 2.
【００１７】制御板１１の傾斜部１１ａが水平面と成す
傾斜角度θ２は２０度程度に設定している。図３に変形
例として示すように、制御板１１における傾斜部１１ａ
の前端縁に、使用者を保護するために僅かの突出寸法の
下向き保護片１１ｃを形成しても良い。The inclination angle θ2 formed by the inclined portion 11a of the control plate 11 with the horizontal plane is set to about 20 degrees. As shown as a modified example in FIG.
May be formed on the front edge of the lower protection piece 11c with a slightly projecting dimension to protect the user.
【００１８】以上の構成において、ドラフトチャンバー
１の運転時に本体２の前面に沿って流れる吸引風は、本
体２の傾斜面２ａに沿って斜め上向きに流れたのち、処
理室３の底板７の前端縁と制御板１１の水平状部１１ｂ
との間の隙間の箇所で風向を水平方向に変えられて、処
理室内に流入する。この場合、本体２の前面に沿って流
れる吸引風の風向は予め後傾方向に向かうようにガイド
されているから、制御板１１の水平状部１１ｂと本体２
との間の箇所で風向を水平方向に変換させることがスム
ースに行われる。In the above configuration, the suction air flowing along the front surface of the main body 2 during the operation of the draft chamber 1 flows obliquely upward along the inclined surface 2 a of the main body 2, and then the front end of the bottom plate 7 of the processing chamber 3. Edge and horizontal portion 11b of control plate 11
The air flow is changed to the horizontal direction at the location of the gap between the two and flows into the processing chamber. In this case, since the wind direction of the suction wind flowing along the front surface of the main body 2 is guided in advance in the backward tilt direction, the horizontal portion 11b of the control plate 11 and the main body 2
It is possible to smoothly change the wind direction in the horizontal direction at a point between the positions.
【００１９】また、本体２の傾斜面２ａの傾斜角度θ１
よりも制御板１１の傾斜部１１ａの傾斜角度θ２を小さ
くしたことにより、本体２の傾斜面２ａと制御板１１の
傾斜部１１ａとの間の間隔は吸引風の進行方向に向けて
徐々に狭まるから、制御板１１と本体２との間から処理
室３内に流れる吸引風は、オリフィス効果によって流速
が速められて処理室に流入する。The inclination angle θ1 of the inclined surface 2a of the main body 2
Since the inclination angle θ2 of the inclined portion 11a of the control plate 11 is smaller than that of the control plate 11, the interval between the inclined surface 2a of the main body 2 and the inclined portion 11a of the control plate 11 is gradually narrowed in the traveling direction of the suction air. Thus, the suction air flowing into the processing chamber 3 from between the control plate 11 and the main body 2 flows into the processing chamber at an increased flow velocity due to the orifice effect.
【００２０】従って、制御板１１と本体２との間から処
理室３に流れ込む吸引風は、その流速を速めた状態で水
平方向に向かうようにスムースに変換されるのであり、
これにより、制御板１１と本体２との間から処理室３内
に流入した吸引風は、底板７の前端縁の箇所で渦流が発
生しないように底板７の上面を這うように流れることに
なり、その結果、処理室３の底面に発生した有毒ガスを
効果的に排除できるのである。Therefore, the suction air flowing into the processing chamber 3 from between the control plate 11 and the main body 2 is smoothly converted so as to travel in the horizontal direction with the flow velocity increased.
As a result, the suction air flowing into the processing chamber 3 from between the control plate 11 and the main body 2 flows along the upper surface of the bottom plate 7 so as not to generate a vortex at the front edge of the bottom plate 7. As a result, the toxic gas generated on the bottom surface of the processing chamber 3 can be effectively eliminated.
【００２１】更に、本体２の前面を傾斜面２ａに形成し
たことにより、制御板１１における傾斜部１１ａの傾斜
角度を２０度程度の緩い角度に設定しても吸引風を適切
にガイドできるから、制御板１１の下面の箇所又は上面
の箇所に渦流が発生することもなく、この点においても
排気機能を向上できる。また、本体２の傾斜面２ａにス
イッチ類やコック類、表示灯等の操作設備１０を設ける
と、これら操作設備１０が制御板１１で保護されるため
汚れを防止できることに加えて、操作設備１０が上向き
になって撮みやすく且つ見やすくなるため、ドラフトチ
ャンバー１の使い勝手も向上する。Further, since the front surface of the main body 2 is formed on the inclined surface 2a, even if the inclination angle of the inclined portion 11a of the control plate 11 is set to a gentle angle of about 20 degrees, the suction air can be appropriately guided. The vortex does not occur on the lower surface or the upper surface of the control plate 11, and the exhaust function can be improved in this respect as well. Further, when operating equipment 10 such as switches, cocks, and indicator lamps is provided on the inclined surface 2a of the main body 2, the operating equipment 10 is protected by the control plate 11 so that dirt can be prevented. The upward direction makes it easier to take and view, so that the usability of the draft chamber 1 is also improved.
【００２２】ところで、図４（Ａ）（Ｂ）に示すよう
に、本体２に傾斜面２ａを形成したに過ぎない構成で
は、吸引風は上方に放散されるため、底板７の前端縁の
箇所に渦流Ｗが発生がしやすくなり、しかも、薬品類が
傾斜面２ａに滴下して操作設備１０が汚れる虞がある。
この場合、（Ｂ）のように本体２の傾斜面２ａの傾斜角
度が大きいと、傾斜面２ａを処理室３に向けて大きく入
り込ませることなく面積を大きくできるので、スペース
の有効利用を図ることができるが、吸引風のガイド機能
は著しく低下する不都合がある。As shown in FIGS. 4 (A) and 4 (B), in the configuration in which only the inclined surface 2a is formed in the main body 2, since the suction air is radiated upward, the position of the front edge of the bottom plate 7 is reduced. The eddy current W is likely to be generated, and the chemicals may drop on the inclined surface 2a, and the operation equipment 10 may be contaminated.
In this case, if the inclination angle of the inclined surface 2a of the main body 2 is large as in (B), the area can be increased without making the inclined surface 2a largely enter the processing chamber 3, so that the space can be effectively used. However, there is an inconvenience that the guide function of the suction air is significantly reduced.
【００２３】これに対して本願発明の構成にすると、本
体２の傾斜面２ａの傾斜角度θ１を大きくした状態で、
吸引風が処理室３の底面に沿って流れるようにガイドで
きるから、スペースの有効利用と排気機能の向上及び操
作設備１０の保護を同時に達成できるのである。また、
制御板１１における傾斜部１１ａの傾斜角度θ２は２０
〜３０度が好ましく、制御板１１における傾斜部１１ａ
の傾斜角度θが２０度以下の場合には、吸引風に方向性
を付与する機能が低下する一方、傾斜部１１ａの傾斜角
度が３０度を越えると、図４（Ｃ）に示すように、制御
板１１の上面箇所での渦流Ｗの発生が徐々に現れると共
に流れ抵抗が増大する（傾斜角度が４５度程度になる
と、渦流Ｗの発生が顕著に現れる）。On the other hand, according to the configuration of the present invention, in a state where the inclination angle θ1 of the inclined surface 2a of the main body 2 is increased,
Since the suction air can be guided to flow along the bottom surface of the processing chamber 3, effective use of space, improvement of the exhaust function, and protection of the operation equipment 10 can be achieved at the same time. Also,
The inclination angle θ2 of the inclined portion 11a in the control plate 11 is 20
To 30 degrees are preferable, and the inclined portion 11a of the control plate 11 is
Is less than 20 degrees, the function of imparting directionality to the suction air is reduced. On the other hand, when the inclination angle of the inclined portion 11a exceeds 30 degrees, as shown in FIG. The generation of the vortex W on the upper surface of the control plate 11 gradually appears, and the flow resistance increases (when the inclination angle is about 45 degrees, the generation of the vortex W appears remarkably).
【００２４】なお、制御板１１の傾斜部１１ａの角度を
調節できるようにしても良い。また、制御板１１の水平
状部１１ｂは、処理室３の奥方向に向けて高さが下がる
ように緩い角度で後傾させても良い。The angle of the inclined portion 11a of the control plate 11 may be adjustable. Further, the horizontal portion 11b of the control plate 11 may be inclined backward at a gentle angle so that the height decreases toward the depth of the processing chamber 3.
【図１】本発明の実施例に係るドラフトチャンバーの斜
視図である。FIG. 1 is a perspective view of a draft chamber according to an embodiment of the present invention.
【図２】（Ａ）は図１のIIＡ−IIＡ視断面図、（Ｂ）は
（Ａ）の要部拡大図である。2A is a sectional view taken along the line IIA-IIA in FIG. 1, and FIG. 2B is an enlarged view of a main part of FIG.
【図３】変形例の要部拡大図である。FIG. 3 is an enlarged view of a main part of a modified example.
【図４】本願発明との比較を示すための要部断面図であ
る。FIG. 4 is a sectional view of a main part for showing a comparison with the present invention.
【図５】従来例を示す要部断面図である。FIG. 5 is a sectional view of a main part showing a conventional example.
１ ドラフトチャンバー ２ 本体 ２ａ 傾斜面 ３ 処理室 ４ 開口部 ５ 扉 ６ 排気ダクト ７ 底板 ８ バイパス通路 １０ 操作設備 １１ 制御板 １１ａ 傾斜部 １１ｂ 水平状部 DESCRIPTION OF SYMBOLS 1 Draft chamber 2 Main body 2a Inclined surface 3 Processing chamber 4 Opening 5 Door 6 Exhaust duct 7 Bottom plate 8 Bypass passage 10 Operating equipment 11 Control board 11a Inclined section 11b Horizontal section
Claims (2)
した本体に、前記処理室内の気体を外部に排出するため
の排気手段を設け、前記開口部の下部には、前記排気手
段による吸引風が処理室の底面に沿って流れるようにガ
イドするための制御板を、処理室の底面と隙間を隔てた
状態で開口部の間口方向に沿って延びるように設けて成
るドラフトチャンバーにおいて、 前記本体の前面のうち開口部の下端縁に沿って延びる部
位を、処理室の奥方向に向けて倒れるように傾斜した傾
斜面に形成する一方、 前記制御板を、前記処理室の奥方向に向けて徐々に高さ
が高くなるように傾斜した傾斜部と、該傾斜部の後端に
連接した水平状部とで側面視く字状に形成して、前記傾
斜部を前記本体における傾斜面の上方に位置せしめ、 更に、前記本体の傾斜面が水平面と成す傾斜角度を、制
御板の傾斜部が水平面と成す傾斜角度よりも大きい角度
に設定していること、を特徴とするドラフトチャンバ
ー。1. A main body having an opening formed in a front surface and forming an inside thereof as a processing chamber is provided with exhaust means for exhausting gas in the processing chamber to the outside. A draft plate provided with a control plate for guiding the suction air by the means to flow along the bottom surface of the processing chamber so as to extend along the frontage of the opening with a gap from the bottom surface of the processing chamber. In the front surface of the main body, a portion extending along the lower edge of the opening is formed on an inclined surface that is inclined so as to fall down in the depth direction of the processing chamber. An inclined portion inclined so as to gradually increase in height in the direction, and a horizontal portion connected to the rear end of the inclined portion are formed in a V-shape in a side view, and the inclined portion is formed in the main body. Located above the inclined surface, Draft chamber, wherein the inclination angle of the inclined surface makes with the horizontal plane, the inclined portion of the control plate is set to an angle larger than the inclination angle between the horizontal plane.
に、スイッチ類やコック類、表示盤等の操作設備を設け
ていることを特徴とするドラフトチャンバー。2. The draft chamber according to claim 1, wherein operation equipment such as switches, cocks, and a display panel is provided on the inclined surface of the main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16518395A JP3326306B2 (en) | 1995-06-30 | 1995-06-30 | Draft chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16518395A JP3326306B2 (en) | 1995-06-30 | 1995-06-30 | Draft chamber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0910604A JPH0910604A (en) | 1997-01-14 |
| JP3326306B2 true JP3326306B2 (en) | 2002-09-24 |
Family
ID=15807428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16518395A Expired - Lifetime JP3326306B2 (en) | 1995-06-30 | 1995-06-30 | Draft chamber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3326306B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009095771A (en) * | 2007-10-17 | 2009-05-07 | Oriental Giken Kogyo Kk | Fume hood |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10146000A1 (en) * | 2001-09-18 | 2003-01-16 | Waldner Laboreinrichtungen | Fume cupboard for chemical laboratory uses additional air directed across its inner surfaces for preventing escape of fumes |
| JP5528658B2 (en) * | 2007-02-13 | 2014-06-25 | 株式会社ダルトン | Draft chamber |
| JP6104844B2 (en) * | 2014-04-01 | 2017-03-29 | 株式会社ダルトン | Draft chamber |
| CN106768761B (en) * | 2016-12-30 | 2023-07-04 | 湖南联诚轨道装备有限公司 | Experiment wind cabinet of rail train traction diagonal flow fan |
| CN110090670B (en) * | 2019-06-05 | 2024-02-20 | 江苏拓米洛高端装备股份有限公司 | Environmental test box with top induced draft type air duct structure |
-
1995
- 1995-06-30 JP JP16518395A patent/JP3326306B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009095771A (en) * | 2007-10-17 | 2009-05-07 | Oriental Giken Kogyo Kk | Fume hood |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0910604A (en) | 1997-01-14 |
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