JPH0670512B2 - Artificial tornado type local exhaust system - Google Patents
Artificial tornado type local exhaust systemInfo
- Publication number
- JPH0670512B2 JPH0670512B2 JP1111788A JP11178889A JPH0670512B2 JP H0670512 B2 JPH0670512 B2 JP H0670512B2 JP 1111788 A JP1111788 A JP 1111788A JP 11178889 A JP11178889 A JP 11178889A JP H0670512 B2 JPH0670512 B2 JP H0670512B2
- Authority
- JP
- Japan
- Prior art keywords
- air
- artificial tornado
- wall
- spiral wall
- local exhaust
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
- B08B15/023—Fume cabinets or cupboards, e.g. for laboratories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/183—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by centrifugal separation, e.g. using vortices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
- B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
- B25H1/20—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby with provision for shielding the work area
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/95—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying specially adapted for specific purposes
- F24F8/97—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying specially adapted for specific purposes for removing tobacco smoke
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F9/00—Use of air currents for screening, e.g. air curtains
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、局所排気装置に関するものであるが、特に人
工的に竜巻を発生させて排気させる人工竜巻機構による
局所排気装置に関するものである。詳しくは横方向に人
工竜巻を発生させて有害ガス・粉塵等の排気ガスを捕集
し排出させる人工竜巻式の局所排気装置に関する。The present invention relates to a local exhaust system, and more particularly to a local exhaust system using an artificial tornado mechanism that artificially generates and exhausts a tornado. More specifically, the present invention relates to an artificial tornado-type local exhaust device that generates an artificial tornado in the lateral direction and collects and discharges exhaust gas such as harmful gas and dust.
従来の人工竜巻による局所排気装置は、排気用フードに
吸引口を有するターミナルボックスを取り付け、エアー
を吸引すると共にフード内の下部からエアーを吹き上げ
てフードの中で旋回流とし、フード内部の人工竜巻を形
成して排気ガス等を排気する装置（トルネードー・フー
ド）がある。The conventional local tornado using an artificial tornado has a terminal box with a suction port attached to the exhaust hood, which sucks air and blows air from the lower part of the hood to create a swirling flow in the hood. There is a device (tornado hood) that forms exhaust gas and exhausts exhaust gas.
この従来装置はフードによって囲まれた中に人工竜巻を
形成しているので、クレーンなどの作業にじゃまになる
など利用範囲が限定されてしまい、種々の局所排気装置
として応用することができず、実用化が図れない問題が
あった。Since this conventional device forms an artificial tornado inside a hood, its use range is limited, such as being a hindrance to work such as a crane, and it cannot be applied as various local exhaust devices. There was a problem that it could not be put to practical use.
そこで、本願出願人が長年の研究成果によって、これら
の問題点を解決する人工竜巻機構による局所排気装置を
開発し、出願（特願昭61−119905号（特開昭62−276348
号））をなした。Therefore, the applicant of the present application has developed a local exhaust system using an artificial tornado mechanism that solves these problems, based on the results of many years of research, and filed an application (Japanese Patent Application No. 61-119905 (Japanese Patent Application Laid-Open No. 62-276348).
No.)).
この本願出願人の従来発明は、「エアー排出孔を設けた
エアー吹出パイプを横方向かつ四角形状に配設し、更に
両端面を遮蔽すると共にエアー排気パイプを設けて、各
エアー吹出パイプ間にエアーカーテンを形成しかつその
エアーカーテンの伴流作用によって、エアーカーテン内
の空間部に旋回気流を形成させエアーカーテン内の自由
空間内に横方向の人工竜巻を発生ならしめて、有害ガス
・粉塵等の排気ガスを捕集し排出させることを特徴とす
る人工竜巻機構による局所排気装置。」（特許請求の範
囲）にある。The conventional invention of the applicant of the present application is that "air discharge pipes provided with air discharge holes are arranged in a lateral direction and in a rectangular shape, and both end faces are further shielded, and air discharge pipes are provided between the air discharge pipes. The air curtain is formed and the wake action of the air curtain creates a swirling airflow in the space inside the air curtain to generate a lateral artificial tornado in the free space inside the air curtain, which may cause harmful gas, dust, etc. The local exhaust device using an artificial tornado mechanism is characterized in that it collects and discharges the exhaust gas of the above. ”(Claims).
すなわち、４本のエアー吹出パイプ間に形成される同一
回転方向のエアーカーテンの伴流作用によって、エアー
カーテン内の自由空間部に横方向へ連続した旋回気流を
形成させ、更にその中心部から左右のエアー排気パイプ
に向う気流を形成ならしめて、自由空間内に人工の竜巻
を発生させることによって、安定した状態で指向性の高
い横方向の人工竜巻を得ることができる。That is, the wake action of the air curtain formed between the four air blowing pipes in the same rotation direction forms a continuous swirling airflow in the lateral direction in the free space in the air curtain, and further from the center to the left and right. By forming an airflow toward the air exhaust pipe and generating an artificial tornado in the free space, it is possible to obtain a laterally oriented tornado with high directivity in a stable state.
この人工竜巻発生機構の原理を基本にして、更に実用化
を図るために本願出願人が開発して出願したのが、特願
昭63−126924号（特開平１−300145号）の特許願（人工
竜巻式の局所排気装置）と特願昭63−276640号（特開平
２−122137号、人工竜巻式発生機構及びその利用法）と
である。Based on the principle of this artificial tornado generating mechanism, the applicant of the present application developed and filed a patent application of Japanese Patent Application No. 63-126924 (Japanese Unexamined Patent Publication No. 1-300145) for further practical application. (Artificial tornado-type local exhaust device) and Japanese Patent Application No. 63-276640 (JP-A-2-122137, artificial tornado-type generating mechanism and its use).
特願昭63−126924号（特開平１−3000145号）の発明
は、「エアー吹出口を有するエアー吹出パイプを横方向
に配設し、該エアー吹出パイプ間にエアーカーテンを形
成させ、該エアーカーテン内の自由空間部に横方向の人
工竜巻を発生させて、有害ガス・粉塵等の排気ガスを捕
集し排出させる人工竜巻機構による局所排気装置であっ
て、前記エアー吹出パイプを固定する側壁板の一側面又
は両側面にエアー排気パイプを装設し、かつ前記エアー
カーテンの自由空間部の任意個所にエアーカーテンを遮
蔽すると共にエアーカーテンの旋回気流を誘導補強させ
る遮蔽板を装設したことを特徴とする人工竜巻式の局所
排気装置。」（特許請求の範囲）であり、また特願昭63
−276640号（特開平２−122137号）の発明は「壁面が中
心部に徐々に向かうように形成された渦巻状壁の両端に
側壁を設け、該側壁に前記渦巻状壁の中心部軸方向に位
置するように吸引口を設け、前記渦巻状壁の基端部及び
先端部と前記側壁とによってエアー吸込口が構成され、
前記側壁に設けた吸引口から空気を吸引することによ
り、前記エアー吸込口から吸込んだ空気が前記渦巻状壁
に沿って流れて旋回気流を形成し、前記中心部軸方向の
人工竜巻を発生させることを特徴とする人工竜巻発生機
構。」（特許請求の範囲）である。The invention of Japanese Patent Application No. 63-126924 (Japanese Unexamined Patent Publication No. 1-3000145) discloses that "air blowing pipes having air blowing ports are arranged in the lateral direction, and an air curtain is formed between the air blowing pipes. A local exhaust device with an artificial tornado mechanism that generates a lateral artificial tornado in a free space in the curtain and collects and discharges exhaust gas such as harmful gas and dust, and a side wall that fixes the air blowing pipe. An air exhaust pipe is installed on one side or both sides of the plate, and a shield plate for shielding the air curtain and guiding and reinforcing the swirling airflow of the air curtain is installed at any place in the free space of the air curtain. An artificial tornado-type local exhaust device characterized by the following. "(Claims)
The invention of Japanese Patent Laid-Open No. 276640 (JP-A-2-122137) discloses that "side walls are provided at both ends of a spiral wall formed so that the wall surface gradually extends toward the center, and the side wall has an axial direction in the central part of the spiral wall. A suction port is provided so as to be located at, and an air suction port is configured by the base end portion and the tip end portion of the spiral wall and the side wall,
By sucking air from the suction port provided on the side wall, the air sucked from the air suction port flows along the spiral wall to form a swirling airflow, and an artificial tornado in the central axial direction is generated. An artificial tornado generating mechanism characterized by the above. (Claims).
この発明は、これら上述の両発明の不都合な点を解消し
て長所のみを得るために開発したものであって、いわゆ
る両発明の改良発明である。The present invention was developed in order to eliminate the disadvantages of the above two inventions and to obtain only the advantages, and is a so-called improved invention of both inventions.
従来の技術は、第６図（特願昭63−276640号（特開平２
−122137号））に示すように局所排気装置Ｐは、作業台
21と、該作業台21上に載置されたこの発明の人工竜巻機
構である排気用フード22と、該排気用フード22に取り付
けられ下流側に吸引ファン（図示せず）が取り付けられ
ている吸引ダクト23と、前記作業台21の下部に取り付け
られたダストボックス24とからなる。The conventional technique is shown in FIG. 6 (Japanese Patent Application No. 63-276640).
-122137)), the local exhaust system P is a workbench.
21, an exhaust hood 22 which is the artificial tornado mechanism of the present invention placed on the work table 21, and a suction fan (not shown) attached to the exhaust hood 22 on the downstream side. It comprises a suction duct 23 and a dust box 24 attached to the lower part of the work table 21.
前記作業台21は、ベーズ25を取り付けられた４本の脚26
によって強固に支持された天板27を有してなる。作業台
21は、これの天板27上に製作物28が載せられ、作業員Ｍ
により、例えば、グラインダー29によって仕上作業が行
なわれても良いように作られている。The workbench 21 has four legs 26 to which a baize 25 is attached.
It has a top plate 27 that is firmly supported by. Workbench
As for 21, the product 28 is placed on the top plate 27 of this, and the worker M
Therefore, for example, the finishing work may be performed by the grinder 29.
前記排気用フード22は、前述の作業台21上で製作物28を
グラインダー29にて作業を行なう際に発生する粉塵等を
排気するためのもので、正面壁30と、その両側に設けら
れた側壁31、31と、正面壁30に連なり、壁面が中心部に
徐々に向かうように形成された渦巻状壁32とからなって
いる。そして、渦巻状壁32の先端部とその両側の側壁31
と正面壁30とで囲まれた細長い矩形状のエアー吸引口33
が形成されている。この渦巻状壁32と該渦巻状壁32によ
って内面が仕切られた前記側壁31の上部の側壁部分31a,
31aとによって略渦巻状の空間34が形成される。この空
間34は、前記吸引ダクト23の下流側にある吸引ファンが
稼動することにより、矩形状のエアー吸引口33から入っ
た排気ガス等が渦巻状壁32に沿って流れることによって
旋回気流が生じた際、その旋回気流を保持させるのに充
分なスペースを持つように形成されている。又、側壁部
分31a,31aには、吸引ダクト23の吸引口23aが取り付けら
れている。The exhaust hood 22 is for exhausting dust and the like generated when the product 28 is worked by the grinder 29 on the work table 21, and is provided on the front wall 30 and both sides thereof. The side walls 31 and 31 are connected to the front wall 30, and the spiral wall 32 is formed so that the wall surface gradually extends toward the center. Then, the tip end of the spiral wall 32 and the side walls 31 on both sides thereof
Air suction port 33 in the shape of an elongated rectangle surrounded by the front wall 30
Are formed. This spiral wall 32 and the side wall portion 31a above the side wall 31 whose inner surface is partitioned by the spiral wall 32,
A substantially spiral space 34 is formed by 31a. In this space 34, a suction fan located on the downstream side of the suction duct 23 is operated, so that exhaust gas or the like entered from the rectangular air suction port 33 flows along the spiral wall 32 to generate a swirling airflow. It has a sufficient space to hold the swirling airflow. A suction port 23a of the suction duct 23 is attached to the side wall portions 31a, 31a.
そして、この吸引口23aの軸線方向は、前記渦巻状壁32
の中心部の軸方向に略一致するようになっている。この
２個所に設けられた吸引ダクト23は、ダンパー35,35を
介して１本のダクトになり、図示しない吸引ファンに接
続されている。尚、この実施例では吸引ダクト23が２個
所の側壁部分31aに接続されているが、片側の側壁部分3
1aにのみ取り付けたものであっても良い。The axial direction of the suction port 23a is the spiral wall 32.
It is designed to substantially coincide with the axial direction of the central part of. The suction ducts 23 provided at these two places become one duct via the dampers 35, 35 and are connected to a suction fan (not shown). In this embodiment, the suction duct 23 is connected to the two side wall portions 31a, but one side wall portion 3a is used.
It may be attached only to 1a.
また、他の従来技術は第７図（特願昭63−126924号）、
（特開平１−300145号））に示すように、41はエアー吹
出口42が穿設されているエアー吹出パイプであり、45は
エアー排出口を有するエアー排気パイプである。このエ
アー吹出パイプ41とエアー排気パイプ45は、側壁板43に
固定されている。側壁板43は反対側にもあり、両面に配
設してある。また、この側壁板43には遮蔽板44が取り付
けてある。この遮蔽板44は、エアー吹出口42から吹出さ
れたエアーにより形成されるエアーカーテンＡを遮蔽す
ると共にそのエアーカーテンの旋回気流を誘導補強させ
るための壁板である。つまり、１本のエアー吹出パイプ
41からエアーが吹出されて形成されるエアーカーテンＡ
が遮蔽板44の平面に当たり、更に下方向に旋回気流とな
る。Further, other prior art is shown in FIG. 7 (Japanese Patent Application No. 63-126924),
As shown in (JP-A-1-300145), reference numeral 41 is an air outlet pipe having an air outlet 42, and 45 is an air exhaust pipe having an air outlet. The air blowing pipe 41 and the air exhaust pipe 45 are fixed to the side wall plate 43. The side wall plate 43 is also on the opposite side and is arranged on both sides. A shield plate 44 is attached to the side wall plate 43. The shielding plate 44 is a wall plate for shielding the air curtain A formed by the air blown from the air outlet 42 and guiding and reinforcing the swirling airflow of the air curtain. In other words, one air blow pipe
Air curtain A formed by blowing air from 41
Hits the plane of the shielding plate 44, and a swirling air current is generated further downward.
このように遮蔽板44を配設すれば、41から吹出されたエ
アーカーテンＡが遮蔽板44の壁面に当たり、排気ガス等
がエアーカーテンＡ内の自由空間から外部に排出される
ことなく安定して人工竜巻Ｈに吸引されることになる。By disposing the shielding plate 44 in this manner, the air curtain A blown out from 41 hits the wall surface of the shielding plate 44, and exhaust gas and the like are stably discharged from the free space in the air curtain A to the outside. It will be sucked into the artificial tornado H.
かかる従来技術の場合は、いずれも人工竜巻が中央部又
は中央上方部でしかも横水平方向に形成されるために、
外部からの吸引力が弱くなり、このために有害ガス、粉
塵などを効率よく捕集吸引することができないばかり
か、装置そのものを大型化しなければならない不都合な
点があった。In the case of such a conventional technique, since the artificial tornado is formed in the central portion or the central upper portion and in the horizontal and horizontal directions,
Since the suction force from the outside is weakened, the harmful gas, dust, etc. cannot be efficiently collected and sucked, and the device itself must be upsized.
この不都合な点を解消するところに本発明が解決しよう
とする課題がある。すなわち、排気用フード内に発生す
る人工竜巻を横方向水平に形成させないで、吸引力を高
めるように変形させることと、エアー吸込口を広くして
も遠方の粉塵等を捕捉吸引できるようにしたところ、本
発明が解決しようとする課題がある。The problem to be solved by the present invention is to solve this disadvantage. That is, the artificial tornado generated in the exhaust hood is not formed horizontally in the horizontal direction, but is deformed so as to increase the suction force, and dust and the like in the distance can be captured and sucked even if the air suction port is widened. However, there is a problem to be solved by the present invention.
上記課題を解決するために、本発明は、正面に開口を有
する箱体の背面壁２の垂直方向上端側を前記開口側に湾
曲させて渦巻状壁13とし、かつ該渦巻状壁13の開口側端
部13aにエアー吹出パイプ６をその空気吹き出し方向を
前記渦巻状壁13の開口側端部13a及びその反対側端部13b
を結ぶ平面に対して直角より該平面側に向けて配設して
エアーカーテンＡを発生させ、更に前記箱体の両側壁3,
3にエアー吸引口４、４を穿設し、該エアー吸引口４、
４の穿設位置はこれからエアーを吸引した際発生する旋
回気流の中心軸線より前記渦巻状壁13側として成る人工
竜巻発生機構と、前記箱体下面に設け作業台１内に収納
すると共に前記エアー吸引口４、４から汚染空気を吸引
して清浄空気にして排出する排気清浄機構と、から成る
ことを特徴とする人工竜巻式の局所排気装置の提供にあ
り、また、前記エアー吹出パイプ６から空気を吹き出す
ことによるエアーカーテンＡの発生に、貫流式の送風機
を用い、更に、前記背面壁２に連なる渦巻状壁13の断面
形状を略放物線状に形成し、側壁３、３にエアー吸引口
４、４を前記渦巻状壁13の開口側端部13a及びその反対
側端部13bを結んだ線上若しくはそれよりも前記渦巻状
壁13側に位置するように配設した人工竜巻式の局所排気
装置の提供にある。In order to solve the above-mentioned problems, the present invention makes a vertical wall upper end side of a back wall 2 of a box having an opening in the front face curved toward the opening side to form a spiral wall 13, and the opening of the spiral wall 13 The air blowing pipe 6 is provided at the side end portion 13a, and the air blowing direction is set to the opening side end portion 13a of the spiral wall 13 and the opposite end portion 13b.
The air curtain A is generated by arranging the air curtain A at a right angle with respect to the plane connecting the two sides of the box body.
3 are provided with air suction ports 4 and 4, and the air suction ports 4 and
The hole 4 is an artificial tornado generating mechanism, which is located on the side of the spiral wall 13 from the central axis of the swirling airflow generated when air is sucked from now on. An artificial tornado-type local exhaust device comprising: an exhaust cleaning mechanism that sucks polluted air from the suction ports 4 and 4 and discharges it into clean air. Further, from the air blowing pipe 6. A flow-through blower is used to generate the air curtain A by blowing out air, and the spiral wall 13 connected to the back wall 2 is formed with a substantially parabolic cross section, and the side walls 3 and 3 are provided with air suction ports. Artificial tornado type local exhaust in which 4 and 4 are arranged so as to be located on the line connecting the opening side end 13a and the opposite end 13b of the spiral wall 13 or on the spiral wall 13 side with respect to that line. The equipment is provided.
上記構成によれば、エアー吹出パイプ６から空気を吹き
出し、渦巻状壁13の開口側端部13a及び反対側端部13bを
結ぶ平面に対して直角より平面側に向けた方向にエアー
カーテンＡを形成させ、同時にエアー吸引口４、４から
空気を吸引すると、エアー吸引口４、４から空気が入
り、作業台１上の空気はそれに連れて背面壁２の下部か
ら渦巻状壁13の湾曲した壁面に沿って流れることによ
り、エアーカーテンＡ、作業台１の上面及び背面壁２の
上端側にある渦巻状壁13の内側に旋回気流を形成し、更
に、エアー吸引口４、４から空気を吸引しているから、
その旋回気流内の中心軸線上に沿った負圧エアー部とエ
アー吸引口４、４に向かう気流とを形成する。この際、
負圧コアー部と気流とは、旋回気流の中心軸線よりもエ
アー吸引口４、４の中心軸線が渦巻状壁13側になってい
ると、両端のエアー吸引口４、４に近い位置の旋回気流
の中心軸線はエアー吸引口４、４に吸引されて偏心し、
これら偏心した負圧コアー部の求心力と気流の遠心力と
の合成作用により、旋回気流を渦流とし、この渦流の中
心に沿ってエアー吸引口４、４に向かう偏心した、すな
わち作業台１側に偏心した人工竜巻を形成する。そし
て、この偏心した人工竜巻の渦収束性により、作業台１
の汚染空気を速やかに排除し排気清浄機構により清浄空
気を得る。According to the above configuration, air is blown from the air blowing pipe 6, and the air curtain A is directed in a direction from the right angle to the plane connecting the opening side end 13a and the opposite side end 13b of the spiral wall 13. When they are formed and air is sucked from the air suction ports 4 and 4 at the same time, air enters from the air suction ports 4 and 4, and the air on the workbench 1 is curved from the lower part of the back wall 2 to the spiral wall 13 accordingly. By flowing along the wall surface, a swirling airflow is formed inside the air curtain A, the upper surface of the workbench 1 and the spiral wall 13 on the upper end side of the back wall 2, and air is further drawn from the air suction ports 4 and 4. I'm sucking,
A negative pressure air portion along the central axis of the swirling airflow and an airflow toward the air suction ports 4 and 4 are formed. On this occasion,
When the central axis of the air suction ports 4, 4 is closer to the spiral wall 13 side than the central axis of the swirling air flow, the negative pressure core portion and the air flow swirl at positions near the air suction ports 4, 4 at both ends. The central axis of the air flow is eccentric by being sucked into the air suction ports 4 and 4,
Due to the combined action of the centripetal force of the eccentric negative pressure core portion and the centrifugal force of the air flow, the swirling air flow is made into a vortex flow, and eccentric toward the air suction ports 4 and 4 along the center of this vortex flow, that is, to the workbench 1 side. Form an eccentric tornado. Then, due to the vortex converging property of this eccentric artificial tornado, the workbench 1
The contaminated air of is promptly removed and clean air is obtained by the exhaust cleaning mechanism.
また、貫流式の送風機により空気を吹き出すと、空気が
平均的に吹き出され、均質なエアーカーテンＡが形成さ
れ、安定した旋回気流が発生する。When air is blown out by a once-through type blower, the air is blown out evenly, a uniform air curtain A is formed, and a stable swirling airflow is generated.
更に、背面壁２に連なる渦巻状壁13の断面形状を略放射
線状に形成し、側壁３、３にエアー吸引口４、４を前記
渦巻状壁13の開口側端部13a及びその反対側端部13bを結
んだ線上若しくはそれよりも前記渦巻状壁13側に位置す
るように配設してあると、作業台１側に偏心した人工竜
巻がなお一層安定的に形成される。Further, the cross-sectional shape of the spiral wall 13 connected to the back wall 2 is formed in a substantially radial shape, and the air suction ports 4 and 4 are formed in the side walls 3 and 3 and the opening side end portion 13a of the spiral wall 13 and its opposite end. If it is arranged on the line connecting the parts 13b or on the side of the spiral wall 13 with respect to the line connecting the parts 13b, an artificial tornado eccentric to the workbench 1 side can be formed more stably.
以下、図面に従って本発明の実施例について説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第１図は本発明の人工竜巻式の局所排気装置を示したも
のであり、Ｐはその局所排気装置全体を図示したもので
ある。１は作業員Ｍがグラインダー14などを使用して作
業する作業台である。この作業台１内には、フィルター
11と排気用送風機10が内装されている。そして、この作
業台１上には手前、すなわち正面が開口されている箱体
の上方部に局所排気装置Ｐが取り付けてある。２はその
背面壁、３は側壁であり、背面壁２に連なる渦巻状壁13
の開口側端部13a近傍にはエアー吹出口７を有するエア
ー吹出パイプ６が配設されている。そして、このエアー
吹出パイプ６は、これのエアー吹出口７からの空気の吹
き出し方向が渦巻状壁13の開口側端部13a及びその反対
側端部13bを結ぶ平面に対して直角より該平面側に向け
た方向になっている。従って、このエアー吹出パイプ６
のエアー吹出口７から空気を吹き出すことにより、エア
ー吹出パイプ６から渦巻状壁13の開口側端部13a及びそ
の反対側端部13bを結ぶ平面に対して直角よりも平面側
あるいは反対側端部13bに向かうエアーカーテンＡが発
生することになる。このエアー吹出パイプ６は、遠心式
の送風機５が連設されており、エアー吹出パイプ６のエ
アー吹出口７から前述のエアーカーテンＡを形成させる
ように構成されている。８は送風機５のエアー吸込口で
あり、12は排出口である。なお、エアー吹出パイプ６の
エアー吹出口７から空気を吹き出すことによるエアーカ
ーテンＡの形成は、第２図（ロ）に示す貫流式の送風機
を用いても良く、この場合エアー吹出パイプ６は必要な
く、エアー吹出パイプ６の取り付け位置に貫流式の送風
機を取り付ければ良い。FIG. 1 shows an artificial tornado type local exhaust system of the present invention, and P shows the entire local exhaust system. Reference numeral 1 denotes a work table on which the worker M works by using the grinder 14 or the like. Inside this workbench 1, there is a filter
11 and exhaust blower 10 are installed. A local exhaust device P is mounted on the workbench 1 in the near side, that is, in the upper part of the box whose front is opened. Reference numeral 2 is its rear wall, 3 is a side wall, and a spiral wall 13 connected to the rear wall 2
An air outlet pipe 6 having an air outlet 7 is disposed near the opening-side end 13a. The air blow-out pipe 6 has a direction in which the air blown out from the air blow-out port 7 is perpendicular to the plane connecting the opening-side end 13a of the spiral wall 13 and the opposite end 13b. The direction is toward. Therefore, this air blowing pipe 6
By blowing out air from the air blowing port 7 of the above, the flat side or the opposite side to the plane connecting the opening side end 13a of the spiral wall 13 and the opposite side end 13b from the air blowing pipe 6 Air curtain A toward 13b will be generated. The air blowing pipe 6 is connected with a centrifugal blower 5 and is configured to form the above-mentioned air curtain A from the air blowing port 7 of the air blowing pipe 6. Reference numeral 8 is an air inlet of the blower 5, and 12 is an outlet. The air curtain A can be formed by blowing air from the air outlet 7 of the air blowing pipe 6 by using a once-through blower shown in FIG. 2B. In this case, the air blowing pipe 6 is necessary. Instead, a once-through type blower may be attached to the attachment position of the air blowing pipe 6.
また、２は上端側に旋回気流を形成するため渦巻状壁13
が有る背面壁であり、この渦巻状壁13は背面壁２に連な
る垂直方向上端側を箱体の開口側に湾曲させてなり、こ
の壁面の形状及びエアー吸引口４、４の位置によって人
工竜巻Ｈを第１図中作業員Ｍ側に偏心させて、半円形状
に変形させることができ、以下にその詳細につき説明す
る。Further, 2 is a spiral wall 13 for forming a swirling air flow on the upper end side.
The spiral-shaped wall 13 is formed by bending the upper end side in the vertical direction connected to the back wall 2 toward the opening side of the box body, and depending on the shape of the wall surface and the positions of the air suction ports 4 and 4, the artificial tornado is formed. H can be eccentric to the worker M side in FIG. 1 to be deformed into a semicircular shape, which will be described in detail below.
第３図と第４図は、本発明機構の原理と従来機構とを対
比した拡大断面図である。両図からも明かのように、前
記渦巻状壁13の断面形状が従来の渦巻状壁13′の断面形
状よりも円弧が楕円形に近く、ほぼ放射線状に形成され
るように構成されている。すなわち、第３図（イ）に示
すように、側壁３、３に設けたエアー吸引口４、４の中
心軸線からの渦巻状壁13、13′の距離をＣからＣ′の位
置に構成し、更にエアー吸引口４、４の中心軸線を渦巻
状壁13の開口側端部13a及び反対側端部13bを結んだ線上
若しくはそれよりも渦巻状壁13側に位置させることで、
渦巻状壁13の壁面に空気が沿って流れることによる旋回
気流の中心軸線とエアー吸引口４、４の中心軸線とを大
きくずらす。そして、エアー吹出パイプ６のエアー吹出
口７から空気を吹き出し、かつ両側のエアー吸引口４、
４から空気を吸引すると、その旋回気流内の中心軸線上
に沿った負圧エアー部とエアー吸引口４、４に向かう気
流とを形成する。この際、これら負圧エアー部と気流と
は両方のエアー吸引口４、４の中心軸線と旋回気流の中
心軸線とが異なるため、両端のエアー吸引口４、４に近
い位置の旋回気流の中心軸線はエアー吸引口４、４に吸
引されて偏心し、これら偏心した負圧コアー部の求心力
と気流の遠心力との合成作用により、旋回気流を渦流と
し、この渦流の中心に沿って、第３図（ロ）に示すよう
にエアー吸引口４、４に向かって偏心し、背面壁２の前
方開口の自由空間にほぼ半円形状に飛び出した状態の人
工竜巻Ｈを発生させることができる。従って、この自由
空間内に半円形状に大きく飛び出した人工竜巻Ｈの渦収
束性を直接的に利用できる。3 and 4 are enlarged cross-sectional views comparing the principle of the mechanism of the present invention with the conventional mechanism. As is clear from both figures, the cross-sectional shape of the spiral wall 13 is configured so that the circular arc is closer to an ellipse than the cross-sectional shape of the conventional spiral wall 13 ', and is formed in a substantially radial shape. . That is, as shown in FIG. 3 (a), the distance between the spiral walls 13 and 13 'from the central axes of the air suction ports 4 and 4 provided on the side walls 3 and 3 is set from the position C to the position C'. By further arranging the central axes of the air suction ports 4 and 4 on the line connecting the opening-side end 13a and the opposite end 13b of the spiral wall 13 or on the spiral wall 13 side further than that.
The central axis of the swirling airflow caused by the air flowing along the wall surface of the spiral wall 13 and the central axes of the air suction ports 4 and 4 are largely displaced. Then, air is blown out from the air blowout port 7 of the air blowout pipe 6, and the air suction ports 4 on both sides are
When air is sucked from 4, the negative pressure air portion along the central axis of the swirling airflow and the airflow toward the air suction ports 4 and 4 are formed. At this time, since the central axis of both the air suction ports 4 and 4 and the central axis of the swirling air flow are different between the negative pressure air portion and the air flow, the center of the swirling air flow near the air suction ports 4 and 4 at both ends. The axis is sucked into the air suction ports 4 and 4 and is eccentric. The combined action of the centripetal force of the eccentric negative pressure core portion and the centrifugal force of the air flow makes the swirling air flow a vortex, and along the center of this vortex, As shown in FIG. 3B, it is possible to generate the artificial tornado H which is eccentric toward the air suction ports 4 and 4 and which is projected in a substantially semicircular shape in the free space of the front opening of the back wall 2. Therefore, the vortex converging property of the artificial tornado H that largely protrudes in a semicircular shape in this free space can be directly utilized.
このように渦巻状壁13は、第４図（イ）に示すように、
全体の幅Ｗとほぼ同寸法の吸込口幅Ｓを取ることがで
き、従来の渦巻状壁13′は、全体の幅Ｗ′よりも小さな
吸込口幅Ｓしかとることができない。従って、排気ガス
の発生源Ｋの幅Ｄが同一であると、第４図（イ）に示し
た本発明装置の原理機構の方が、吸込む幅が広くなる。
しかも、本発明装置では、人工竜巻Ｈが自由空間内に半
円形状に大きく飛び出して排気ガスの発生源Ｋの近くに
位置するから、すなわち、この人工竜巻の中心部に形成
される負圧コアー部の円周の周分速度の速い人工竜巻Ｈ
が排気ガスの発生源Ｋに近いため、吸引力が強く、人工
竜巻Ｈの渦収束性を有効に利用できることが解る。ま
た、渦巻状壁13の縦寸法幅ｈも従来のｈ′よりも狭く出
来るので、構造上はもちろんのこと作業性にも有効であ
る。Thus, the spiral wall 13 is, as shown in FIG.
The suction port width S can be approximately the same as the overall width W, and the conventional spiral wall 13 'can only have a suction port width S smaller than the overall width W'. Therefore, if the width D of the exhaust gas generation source K is the same, the principle mechanism of the device of the present invention shown in FIG. 4 (a) has a wider suction width.
Moreover, in the device of the present invention, since the artificial tornado H largely protrudes in a semicircular shape in the free space and is located near the exhaust gas generation source K, that is, the negative pressure core formed at the center of the artificial tornado. Artificial tornado H with a high peripheral speed
Is close to the source K of the exhaust gas, the suction force is strong and the vortex converging property of the artificial tornado H can be effectively used. Further, since the vertical dimension width h of the spiral wall 13 can be made narrower than that of the conventional h ', it is effective not only in terms of structure but also in workability.
図５は、本発明原理を更に詳しく説明したものであり、
第５図（イ）は、本発明の吸引力の状態を示し、第５図
（ロ）は従来の場合を対比させて図示したものである。FIG. 5 illustrates the principle of the present invention in more detail.
FIG. 5A shows the state of the suction force of the present invention, and FIG. 5B shows the state of the conventional case in comparison.
本図からも明らかのように、本発明装置では人工竜巻Ｈ
が渦巻状壁13の吸込口から自由空間内に半円形状に大き
く飛び出ており、従来装置では渦巻状壁13′の吸込口内
に人工竜巻Ｈがある。そこで、同一の吸引風速をそれぞ
れプロットした等速度線L1，L′1を対比する。ここで、
渦巻状壁13の吸込口端上のＯ点から等速度線L1上のS1点
までの距離をOS1とし、渦巻状壁13′の吸込口端上のO′
点から等速度線L′1上のS′1点までの距離をO′S′1と
すると、OS1>O′S′1となる。同様に、等速度線L2，L′
2、及びL3，L′3を対比すると、OS2>O′S′2,OS3>O′
S′3となる。As is clear from this figure, in the device of the present invention, an artificial tornado H
Largely protrudes in a semicircular shape from the suction port of the spiral wall 13 into the free space. In the conventional device, the artificial tornado H is present in the suction port of the spiral wall 13 '. Therefore, the constant velocity lines L 1 and L ′ 1 in which the same suction wind velocity is plotted are compared. here,
Let OS 1 be the distance from the point O on the suction port end of the spiral wall 13 to the point S 1 on the constant velocity line L 1 , and O ′ on the suction port end of the spiral wall 13 ′.
The distance to the 'S on 1' point constant velocity L 'When 1, OS 1>O'S' O'S from point a 1. Similarly, constant velocity lines L 2 , L ′
2 and L 3 and L ′ 3 are compared, OS 2 > O ′S ′ 2 , OS 3 > O ′
The S '3.
つまり、従来例の等速度線がほぼ円形状になっているの
に対して、本発明の場合ではほぼ楕円形状になっている
ので、エアー吸引口４、４から遠く離れた位置の汚染空
気等を有効に吸引することが可能となる。That is, the constant velocity line of the conventional example has a substantially circular shape, whereas in the case of the present invention, it has a substantially elliptical shape. Can be effectively sucked.
本発明は、正面に開口を有する箱体の背面壁２の垂直方
向上端側を前記開口側に湾曲させて渦巻状壁13とし、か
つ該渦巻状壁13の開口側端部13aにエアー吹出パイプ６
をその空気吹き出し方向を前記渦巻状壁13の開口側端部
13a及びその反対側端部13bを結ぶ平面に対して直角より
該平面側に向けて配設してエアーカーテンＡを発生さ
せ、更に前記箱体の両側壁３、３にエアー吸引口４、４
を穿設し、該エアー吸引口４、４の穿設位置はこれから
エアーを吸引した際発生する旋回気流の中心軸線の前記
渦巻状壁13側として成る人工竜巻機構と、前記箱体下面
に設けた作業台１内に収納すると共に前記エアー吸引口
４、４から汚染空気を吸引して清浄空気にして排出する
排気清浄機構と、から成る構成になっているので、従来
のように横方向の水平竜巻でなく前方向に飛び出した状
態の人工竜巻が形成されることになる。その結果、自由
空間に形成される人工竜巻の中心部が作業員の手前の方
まで飛び出るので、遠方からも強力に排気ガスを捕捉吸
引させることができ、エアー吸引口４、４から遠く離れ
た位置の有毒ガス等で汚染された空気を有効に吸引し、
浄化させて清浄な空気にして排出させることができる。
従って、作業所等室内空気を常時きれいな空気に保つこ
とができる。According to the present invention, the upper end side in the vertical direction of the back wall 2 of the box body having the opening on the front side is curved to the opening side to form the spiral wall 13, and the air blow pipe is provided at the opening side end 13a of the spiral wall 13. 6
The air blowing direction is defined as the opening side end of the spiral wall 13.
The air curtain A is generated by arranging the air curtain A toward a plane connecting the plane 13a and the end 13b on the opposite side thereof at right angles to the plane, and the air suction ports 4, 4 are formed on both side walls 3, 3 of the box body.
The air suction ports 4 and 4 are provided at the positions where the artificial tornado mechanism is formed on the side of the spiral wall 13 of the central axis of the swirling airflow generated when air is sucked from the artificial tornado mechanism. And the exhaust cleaning mechanism for sucking the contaminated air from the air suction ports 4 and 4 to make clean air and discharge the clean air. Instead of a horizontal tornado, an artificial tornado that protrudes forward is formed. As a result, the central part of the artificial tornado formed in the free space pops up toward the front of the worker, so that exhaust gas can be strongly captured and sucked from a distance, and the air suction ports 4 and 4 are far away. Effectively inhales air contaminated with toxic gas at the location,
It can be purified into clean air and discharged.
Therefore, it is possible to always keep the indoor air such as a workplace clean.
また、前記エアーカーテンＡの発生に貫流式の送風機を
用いているので、簡単な機構でもって均質なエアーカー
テンＡを形成させ、安定した人工竜巻を発生させる。こ
の人工竜巻の渦収束性により汚染空気を直ちに吸引し清
浄空気に変えることができる。従って、低コストで量産
出来るので、実用性に富んだ装置を提供することができ
る。Further, since the once-through type blower is used to generate the air curtain A, the uniform air curtain A is formed by a simple mechanism and a stable artificial tornado is generated. Due to the vortex converging property of this artificial tornado, polluted air can be immediately sucked and converted into clean air. Therefore, mass production can be performed at low cost, and a highly practical device can be provided.
また、さらに背面壁２に連なる渦巻状壁13の断面形状を
略放物線状に形成し、側壁３、３にエアー吸引口４、４
を前記渦巻状壁13の開口側端部13a及びその反対側端部1
3bを結んだ線上若しくはそれよりも渦巻状壁側13に位置
するように配設してあると、作業台１側に偏心した人工
竜巻がなお一層安定的に形成される。従って、上述の効
果がなお一層顕著になる。Further, the cross-sectional shape of the spiral wall 13 connected to the rear wall 2 is formed into a substantially parabolic shape, and the side walls 3 and 3 are provided with air suction ports 4 and 4.
The opening side end 13a of the spiral wall 13 and the opposite end 1
If it is arranged so as to be located on the line connecting the 3b or on the side of the spiral wall 13 further than that, an artificial tornado eccentric to the workbench 1 side can be formed more stably. Therefore, the above-mentioned effect becomes more remarkable.
第１図と第２図とは本発明の人工竜巻式の局所排気装置
を示した全体斜視図と一部拡大説明図、第３図、第４図
及び第５図は本発明装置の原理を示した説明概要図、第
６図と第７図は従来装置を示した説明概要図である。 １、21……作業台、２……背面壁 ４、４′、23a……エアー吸引口、５……遠心式の送風
機 ６、41……エアー吹出パイプ、７、42……エアー吹出口 ８……エアー吸込口、９、24……ダストボックス 11……フィルター、12……排出口 13、13′、32……渦巻状壁、13a……開口側端部 13b……反対側端部、45……エアー排気パイプ Ｐ……局所排気装置、Ａ……エアーカテン Ｈ……人工竜巻、Ｓ……吸込口幅1 and 2 are an overall perspective view showing an artificial tornado type local exhaust device of the present invention and a partially enlarged explanatory view thereof, and FIGS. 3, 4, and 5 show the principle of the device of the present invention. 6 and 7 are schematic explanatory views showing a conventional device. 1, 21 ...... Workbench 2, Rear wall 4, 4 ', 23a ...... Air suction port 5 ...... Centrifugal blower 6, 41 ...... Air blow pipe, 7, 42 ...... Air blow port 8 ...... Air intake port, 9, 24 ...... Dust box 11 ...... Filter, 12 ...... Exhaust port 13, 13 ', 32 ...... Swirl wall, 13a ...... Open side end 13b ...... Opposite side end, 45 …… Air exhaust pipe P …… Local exhaust device, A …… Air knife H …… Artificial tornado, S …… Suction width
Claims (3)
方向上端側を前記開口側に湾曲させて渦巻状壁13とし、
かつ該渦巻状壁13の開口側端部13aにエアー吹出パイプ
６をその空気吹き出し方向を前記渦巻状壁13の開口側端
部13a及びその反対側端部13bを結ぶ平面に対して直角よ
り該平面側に向けて配設してエアーカーテンＡを発生さ
せ、更に前記箱体の両側壁３、３にエアー吸引口４、４
を穿設し、該エアー吸引口４、４の穿設位置はこれから
エアーを吸引した際発生する旋回気流の中心軸線より前
記渦巻状壁13側として成る人工竜巻発生機構と、前記箱
体下面に設けた作業台１内に収納すると共に前記エアー
吸引口４、４から汚染空気を吸引して清浄空気にして排
出する排気清浄機構と、から成ることを特徴とする人工
竜巻式の局所排気装置。1. A spiral wall 13 in which a vertical upper end side of a back wall 2 of a box having an opening at the front is curved to the opening side,
Further, the air blowing pipe 6 is arranged at the opening side end 13a of the spiral wall 13 and its air blowing direction is perpendicular to the plane connecting the opening side end 13a of the spiral wall 13 and the opposite end 13b. The air curtain A is generated by arranging it toward the plane side, and the air suction ports 4, 4 are further formed on both side walls 3, 3 of the box body.
The artificial tornado generating mechanism, which is located on the side of the spiral wall 13 with respect to the central axis of the swirling airflow generated when air is sucked from the artificial tornado generating mechanism and the bottom surface of the box body. An artificial tornado-type local exhaust device comprising: an exhaust cleaning mechanism that is housed in the workbench 1 provided and that sucks polluted air from the air suction ports 4 and 4 to make clean air and discharge the clean air.
すことによるエアーカーテンＡの発生に貫流式の送風機
を用いた請求項（１）記載の人工竜巻式の局所排気装
置。2. The artificial tornado type local exhaust system according to claim 1, wherein a once-through type blower is used to generate the air curtain A by blowing air from the air blowing pipe 6.
状を略放物線状に形成し、側壁３、３にエアー吸引口
４、４を前記渦巻状壁13の開口側端部13a及びその反対
側端部13bを結んだ線上若しくはそれよりも前記渦巻状
壁13側に位置するように配設してなる請求項（１）又は
（２）記載の人工竜巻式の局所排気装置。3. A spiral wall 13 connected to the back wall 2 has a substantially parabolic cross-sectional shape, and air suction ports 4 and 4 are formed in the side walls 3 and 3, respectively. The artificial tornado-type local exhaust device according to claim 1 or 2, wherein the local exhaust device is arranged so as to be located on a line connecting the opposite end portions 13b or on the side of the spiral wall 13 further than that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1111788A JPH0670512B2 (en) | 1989-04-28 | 1989-04-28 | Artificial tornado type local exhaust system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1111788A JPH0670512B2 (en) | 1989-04-28 | 1989-04-28 | Artificial tornado type local exhaust system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02290452A JPH02290452A (en) | 1990-11-30 |
| JPH0670512B2 true JPH0670512B2 (en) | 1994-09-07 |
Family
ID=14570172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1111788A Expired - Lifetime JPH0670512B2 (en) | 1989-04-28 | 1989-04-28 | Artificial tornado type local exhaust system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0670512B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014104547A1 (en) * | 2012-12-28 | 2014-07-03 | 한국생산기술연구원 | Vortex-type discharge hood |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5904755A (en) * | 1996-09-13 | 1999-05-18 | Tornex, Inc. | Furniture having air control functions |
| TWM279718U (en) * | 2005-07-08 | 2005-11-01 | Inst Of Occupational Safety & Health Council Of Labor Affairs | Air-isolator fume hood |
| FR3079601B1 (en) * | 2018-03-27 | 2020-04-10 | Osmose | AIR EXTRACTION DEVICE FOR PROTECTING PEOPLE FROM POLLUTANT EMISSIONS |
| US11207630B2 (en) * | 2020-04-25 | 2021-12-28 | Aerocontain Technologies Inc. | Aerosol protection system |
| CN113814378A (en) * | 2021-09-28 | 2021-12-21 | 机械工业第六设计研究院有限公司 | Dust removal method of shakeout machine |
-
1989
- 1989-04-28 JP JP1111788A patent/JPH0670512B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014104547A1 (en) * | 2012-12-28 | 2014-07-03 | 한국생산기술연구원 | Vortex-type discharge hood |
| CN104039468A (en) * | 2012-12-28 | 2014-09-10 | 韩国生产技术研究院 | Vortex-type discharge hood |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02290452A (en) | 1990-11-30 |
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