EP0002701B1 - Air louver for an exhaust air duct - Google Patents

Air louver for an exhaust air duct Download PDF

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Publication number
EP0002701B1
EP0002701B1 EP78101606A EP78101606A EP0002701B1 EP 0002701 B1 EP0002701 B1 EP 0002701B1 EP 78101606 A EP78101606 A EP 78101606A EP 78101606 A EP78101606 A EP 78101606A EP 0002701 B1 EP0002701 B1 EP 0002701B1
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EP
European Patent Office
Prior art keywords
exhaust air
base surface
dome
air conduction
narrow side
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
Application number
EP78101606A
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German (de)
French (fr)
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EP0002701A1 (en
Inventor
Hermann Kurrle
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Schako KG
Original Assignee
Schako Metallwarenfabrik Ferdinand Schad KG
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Publication of EP0002701A1 publication Critical patent/EP0002701A1/en
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Publication of EP0002701B1 publication Critical patent/EP0002701B1/en
Expired legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02Ducting arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00Ventilation
    • F24F2007/001Ventilation with exhausting air ducts

Definitions

  • the invention relates to an exhaust air guide device for insertion into a wall opening of an exhaust air duct, which has a guide surface which is arranged above an open rectangular base surface and which extends from a narrow side of the base surface and projects into the interior of the duct, the maximum gradient of which with respect to the base surface over the entire length of the base surface is between 10 ° and is 45 °.
  • exhaust air grilles of various designs are installed directly in the duct wall or attached to the inlet opening of a branch duct.
  • air is sucked into the duct through the exhaust air grille.
  • exhaust ducts e.g. can be very long in large halls or with extraction over several floors, a larger number of exhaust air grilles may have to be installed in the duct wall at suitable intervals. Since suction is to be applied uniformly over all grilles, the grilles are equipped with throttling devices of different designs.
  • the invention has for its object to improve the known exhaust air guiding device so that an introduction of the exhaust air with the least possible disturbance of the flow conditions and low pressure losses is ensured and a favorable throttling of the exhaust air is made possible. This goal is to be achieved with a device that is mass-produced, as simple and easy to adapt as possible.
  • the guide surface is designed as a curved dome surface that forms curved, trapezoidal or polygonal one-piece cut lines in all planes extending perpendicular to the base surface and parallel to the narrow sides thereof, from the two longitudinal sides of the base surface, and that the one end of the base surface of the exhaust air guiding device, which is arranged perpendicular to the base surface, is designed as a throttle surface which has broken out entirely or partially along predetermined breaking lines running parallel to this narrow side.
  • the feature of claim 2 not only facilitates the installation of the guide surface in the opening of an exhaust air duct, but also has a favorable influence on the flow of the exhaust air changing its flow direction inside the guide surface.
  • the features of claim 3 allow a multiple enlargement of the range of the air flow rate to be set by breaking out the throttle surface, in that, with a single size of the guide surface held in stock, larger suction openings are also covered by inserting several identical devices side by side and / or one behind the other in the opening and thus the possible air flow can be changed within wide limits. For this purpose, only a single size of the exhaust dome needs to be made and kept in stock.
  • the set of exhaust air domes inserted into the opening essentially gives the same low disturbance of the flow and pressure conditions as a single exhaust air dome and can also be set in the factory to a desired extraction volume in a very simple manner by more or less extensive breaking out of the throttle surfaces.
  • the dome-shaped exhaust air guide device is inserted into an opening in the exhaust air duct wall in such a way that the dome surface extends obliquely inwards from the duct wall in the direction of flow through the duct and opens downstream.
  • the open rectangular base area of the dome can be installed in the wall opening of the channel either directly or, preferably, via an installation frame adapted to the shape of the channel wall, the installation frame extends around the base area assigned to the dome area essentially perpendicular to this base area and has a fastening edge.
  • the exhaust dome according to the invention is a very easy to manufacture and just as easy to install in the openings of an exhaust duct, which can be adapted in a very simple manner to the respective flow and pressure conditions by, depending on the requirements, more or less parts of the opening of the dome Partially occluding throttle surface are broken away along the predetermined breaking lines.
  • the exhaust air dome according to the invention produces a minimal disturbance of the flow and pressure conditions in the exhaust air duct compared to known devices, and that it is possible, in particular by factory calculation of the pressure losses occurring along the exhaust air duct, at the factory by breaking off parts or also adjust the entire throttle area so that the suction through all exhaust air domes along half is not necessary, boring and hard it is not necessary to carry out tedious and difficult adjustment work on the spot at the individual openings of a built-in exhaust air duct. This complicated work can be eliminated by using the exhaust air domes according to the invention.
  • the production of the exhaust air dome according to the invention is simple, so that it can be carried out in the workshop without special equipment.
  • the computing effort in determining the throttle area size for the individual exhaust air dome is so small that it is not significant compared to the omission of adjustment work for the individual exhaust air openings.
  • the pressure loss occurring at the individual exhaust air domes is extremely small.
  • the exhaust air dome 10 shown in FIG. 1 consists of a domed surface 14 that bulges over an open rectangular base surface 12, which is preferably made of sheet iron, but can also be made of aluminum, brass, V2A steel, plastic or the like.
  • the dome surface 14 starts on the two long sides 16 and 18 and on a narrow side 20 from the base surface 12 and rises uniformly with respect to the base surface starting from the narrow side 20 to the opposite narrow side 22. Above the narrow side 22, it forms a portal-like opening 24 arranged perpendicular to the base surface 12, which can be trapezoidal according to FIG. 5 or 6 or bordered by a curved line according to FIG. 7.
  • openings with polygonal borders can also be used, but the opening should not be rectangular, since this has an adverse effect on the flow and pressure conditions.
  • the opening 24 is surrounded at the top and on the sides by a drawn-in edge 26, to which a throttle surface 28 is expediently fastened via weakened predetermined breaking lines.
  • the throttling surface itself is crossed by several predetermined breaking lines 30 running parallel to the narrow side 22 of the base area, so that the individual fields 1, 2, 3, 4 (see FIG. 9) can be broken out in this order as required.
  • the largest opening of the exhaust air dome is the opening 0, which is only surrounded by the edge 26.
  • the fields 1, 2, 3, 4 of the throttle surface 28 are broken out in order from top to bottom, so that the outlet opening enlarged from top to bottom. in this order there is the advantage that the air emerging through the respectively formed outlet opening can maintain the exit angle determined by the dome surface 14 undeflected.
  • the largest slope of the exhaust air dome 10 with respect to the base surface 12 has the upward-facing cover surface 32. According to FIG. 4, it includes the angle ⁇ with the base surface, which is preferably between 10 ° and 45 ° is between 15 ° and 20 °. In the case of a curved cross section of the dome according to FIG. 7, this greatest slope would only have the generatrix of the dome 10 running along the vertical central plane 34.
  • a mounting frame 36 protruding vertically downward from the base surface 12 is fastened to the dome surface 10 and bears a fastening edge 38 running parallel to the base surface 12.
  • Installation frame 36 and mounting edge 38 can be modified depending on the cross section of the duct and the shape of the exhaust air opening into which the exhaust air dome is to be inserted. As a result, the exhaust air dome according to the invention is very easy to adapt to rectangular, round or other duct shapes.
  • FIG. 1 also shows how, on the one hand, another similar exhaust air dome 10 'is attached to one narrow side 22 and, on the other hand, another similar exhaust air dome 10 "is attached to one long side 16.
  • openings of any size can be made in the duct wall are covered by the exhaust air domes according to the invention, only the installation frame having to be enlarged accordingly, so that it comprises all the intended exhaust air domes. Examples for placing three exhaust air domes 10 'in series and for placing three exhaust air domes 10 "next to one another are shown in FIG. 11 indicated schematically.
  • FIG. 2 also shows in a schematically simplified manner how an exhaust air dome 10 according to the invention with a mounting frame 36 and a fastening edge 38 is inserted into a corresponding opening 40 in a flat wall 42 of an exhaust air duct 46 through which arrow 44 flows.
  • An exhaust air grille 48 known per se, is inserted within the mounting frame and its edge 50 overlaps the fastening edge 38. The attachment of the exhaust air grille 48 is thus in no way hindered by the exhaust air dome according to the invention.
  • dome surface can also be designed such that the cutting lines are polygonal or continuously curved according to FIG. 7.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Duct Arrangements (AREA)
  • Air-Flow Control Members (AREA)
  • Incineration Of Waste (AREA)
  • Air Conditioning Control Device (AREA)
  • Ventilation (AREA)

Description

Die Erfindung betrifft eine Abluftleitvorrichtung zum Einsetzen in eine Wandöffnung eines Abluftkanals, die eine über einer offenen rechteckigen Grundfläche angeordnete, von einer Schmalseite der Grundfläche ausgehende, ins Kanalinnere ragende Leitfläche aufweist, deren maximale Steigung bezüglich der Grundfläche über der ganzen Länge der Grundfläche zwischen 10° und 45° liegt.The invention relates to an exhaust air guide device for insertion into a wall opening of an exhaust air duct, which has a guide surface which is arranged above an open rectangular base surface and which extends from a narrow side of the base surface and projects into the interior of the duct, the maximum gradient of which with respect to the base surface over the entire length of the base surface is between 10 ° and is 45 °.

In einem Abluftkanal mit rundem oder eckigem Querschnitt werden Abluftgitter unterschiedlicher Bauart direkt in die Kanalwand eingebaut oder an der Einlaßöffnung eines Stichkanals angebracht. Bei Erzeugung eines Luftstroms durch den Abluftkanal wird durch die Abluftgitter Luft in den Kanal gesaugt. Da solche Abluftkanäle z.B. in großen Hallen oder bei Absaugung über mehrere Stockwerke sehr lang sein können, muß gegebenenfalls in geeigneten Abständen eine größere Anzahl von Abluftgittern in die Kanalwand eingebaut werden. Da über alle Gitter gleichmäßig abgesaugt werden soll, werden die Gitter mit Drosselvorrichtungen unterschiedlicher Bauart ausgerüstet.In an exhaust air duct with a round or square cross-section, exhaust air grilles of various designs are installed directly in the duct wall or attached to the inlet opening of a branch duct. When an air flow is generated through the exhaust air duct, air is sucked into the duct through the exhaust air grille. Since such exhaust ducts e.g. can be very long in large halls or with extraction over several floors, a larger number of exhaust air grilles may have to be installed in the duct wall at suitable intervals. Since suction is to be applied uniformly over all grilles, the grilles are equipped with throttling devices of different designs.

Es ist nun außerordentlich schwierig, über . alle in einen Abluftkanal eingebaute Abluftgitter eine gleichmäßige Absaugung zu erzielen. Außerdem stört die durch die Abluftgitter angesaugte Luft die Strömungsverhältnisse im Abluftkanal mehr oder weniger stark.It is extremely difficult now, over. all exhaust grilles installed in an exhaust air duct to achieve uniform extraction. In addition, the air sucked in through the exhaust air grille more or less disrupts the flow conditions in the exhaust air duct.

Es ist bekannt, daß bei schräger Einleitung eines Nebenluftstroms in die Strömung eines Luftkanals geringere Strömungsstörungen und Druckverluste auftreten. Bei unzweckmäßiger Drosselung der eingeleiteten Luftströme treten jedoch auch hier starke Druckverluste auf, und es ist bei langen Kanälen oft nicht möglich, einen einwandfreien Druckausgleich für alle Abluftgitter zu erzielen.It is known that when a secondary air flow is introduced obliquely into the flow of an air duct, less flow disturbances and pressure losses occur. If the introduced air flows are inappropriately throttled, however, there are strong pressure losses here too, and it is often not possible with long ducts to achieve perfect pressure compensation for all exhaust air grilles.

Ferner ist aus der DE-U-1 779 163 eine Vorrichtung der eingangs genannten Art bekannt, mit der eine genaue Drosselung bei geringer Störung der Strömungsverhältnisse im Abluftkanal nicht möglich ist. Die abgesaugte Luft kann nämlich nicht nur in Kanalrichtung über der einen Schmalseite der Grundfläche aus dem von der Leitfläche überdeckten Bereich austreten, sondern auch zu beiden Seiten über den Längsseiten der rechteckigen Grundfläche. Dadurch ergeben sich zwangsweise Strömungsstörungen und Verwirbelungen, die für den angestrebten Zweck nachteilig sind. Eine Drosselung ist nur durch Verstellung des Neigungswinkels der Leitfläche möglich, wodurch wiederum die Strömungsverhältnisse stark beeinflußt werden. Ein Abgleich der Absaugvolumina mehrerer Absaugöffnungen längs eines Absaugkanals wird dadurch erschwert.Furthermore, from DE-U-1 779 163 a device of the type mentioned is known, with which an exact throttling with little disturbance of the flow conditions in the exhaust air duct is not possible. The extracted air can namely exit not only in the channel direction over the one narrow side of the base area from the area covered by the guide surface, but also on both sides over the long sides of the rectangular base area. This results in forced flow disturbances and turbulence, which are disadvantageous for the intended purpose. Throttling is only possible by adjusting the angle of inclination of the guide surface, which in turn greatly influences the flow conditions. This makes it more difficult to balance the suction volumes of several suction openings along one suction channel.

Der Erfindung liegt die Aufgabe zugrunde, die bekannte Abluftleitvorrichtung so zu verbessern, daß eine Einleitung der Abluft mit moglichst geringer Störung der Strömungsverhältnisse und geringen Druckverlusten gewährleistet und eine günstige Drosselung der Abluft ermöglicht ist. Dieses Ziel soll mit einer in Massenfertigung herzustellenden, möglichst einfachen und einfach anzupassenden Vorrichtung erreicht werden.The invention has for its object to improve the known exhaust air guiding device so that an introduction of the exhaust air with the least possible disturbance of the flow conditions and low pressure losses is ensured and a favorable throttling of the exhaust air is made possible. This goal is to be achieved with a device that is mass-produced, as simple and easy to adapt as possible.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Leitfläche als gewölbte Domfläche ausgebildet ist, die in allen senkrecht zur Grundfläche und parallel zu deren Schmalseiten verlaufenden Ebenen von den zwei Längsseiten der Grundfläche ausgehende, gekrümmte, trapezförmige oder mehreckige einstückige Schnittlinien bildet, und daß die über der einen Schmalseite der Grundfläche senkrecht zur Grundfläche angeordnete Stirnseite der Abluftleitvorrichtung als Drosselfläche ausgebildet ist, die ganz oder teilweise längs parallel zur dieser Schmalseite verlaufenden Sollbruchlinien ausgebrochen ist.This object is achieved in that the guide surface is designed as a curved dome surface that forms curved, trapezoidal or polygonal one-piece cut lines in all planes extending perpendicular to the base surface and parallel to the narrow sides thereof, from the two longitudinal sides of the base surface, and that the the one end of the base surface of the exhaust air guiding device, which is arranged perpendicular to the base surface, is designed as a throttle surface which has broken out entirely or partially along predetermined breaking lines running parallel to this narrow side.

In den Unteransprüchen sind zweckmäßige Ausgestaltungen der Erfindung unter Schutz gestellt. Das Merkmal des Anspruchs 2 erleichtert nicht nur den Einbau der Leitfläche in die Öffnung eines Abluftkanals, sondern beeinflußt auch den Strömungsverlauf der ihre Strömungsrichtung im Innern der Leitfläche ändernden Abluft günstig. Die Merkmale des Anspruchs 3 ermöglichen eine mehrfache Vergrößerung des Bereiches des durch Ausbrechen der Drosselfläche einzustellenden Luftdurchsatzes, indem mit einer einzigen in Vorrat gehaltenen Größe der Leitfläche auch größere Absaugöffnungen durch Einsetzen mehrerer gleicher Vorrichtungen neben- und/ oder hintereinander in die Öffnung überdeckt und somit der mögliche Luftdurchsatz in weiten Grenzen verändert werden können. Zu diesem Zweck muß nur eine einzige Größe des Abluftdoms hergestellt und auf Lager gehalten werden. Der in die Öffnung eingesetzte Satz von Abluftdomen ergibt im wesentlichen die gleiche geringe Störung der Strömungs- und Druckverhältnisse wie ein einziger Abluftdom und läßt sich ebenfalls durch mehr oder weniger weitgehendes Ausbrechen der Drosselflächen in sehr einfacher Weise bereits fabrikseitig auf ein gewünschtes Absaugvolumen einstellen.In the dependent claims, expedient refinements of the invention are protected. The feature of claim 2 not only facilitates the installation of the guide surface in the opening of an exhaust air duct, but also has a favorable influence on the flow of the exhaust air changing its flow direction inside the guide surface. The features of claim 3 allow a multiple enlargement of the range of the air flow rate to be set by breaking out the throttle surface, in that, with a single size of the guide surface held in stock, larger suction openings are also covered by inserting several identical devices side by side and / or one behind the other in the opening and thus the possible air flow can be changed within wide limits. For this purpose, only a single size of the exhaust dome needs to be made and kept in stock. The set of exhaust air domes inserted into the opening essentially gives the same low disturbance of the flow and pressure conditions as a single exhaust air dome and can also be set in the factory to a desired extraction volume in a very simple manner by more or less extensive breaking out of the throttle surfaces.

Die domförmige Abluftleitvorrichtung gemäß der Erfindung, nachfolgend kurz auch Abluftdom genannt, wird derart in eine Öffnung der Abluftkanalwandung eingesetzt, daß die Domfläche sich von der Kanalwandung in Durchströmungsrichtung des Kanals schräg nach innen erstreckt und sich stromabwärts öffnet. Die offene rechteckige Grundlfäche des Doms kann dabei entweder direkt oder vorzugsweise über einen der Form der kanalwandung angepaßten Einbaurahmen in die Wandöffnung des Kanals eingebaut werden, wobei sich der Einbaurahmen rings um die der Domfläche zugeordnete Grundfläche im wesentlichen senkrecht zu dieser Grundfläche erstreckt und einen Befestigungsrand aufweist.The dome-shaped exhaust air guide device according to the invention, hereinafter also referred to as exhaust air dome, is inserted into an opening in the exhaust air duct wall in such a way that the dome surface extends obliquely inwards from the duct wall in the direction of flow through the duct and opens downstream. The open rectangular base area of the dome can be installed in the wall opening of the channel either directly or, preferably, via an installation frame adapted to the shape of the channel wall, the installation frame extends around the base area assigned to the dome area essentially perpendicular to this base area and has a fastening edge.

Der erfindungsgemäße Abluftdom stellt eine sehr einfach herzustellende und ebenso einfach in den Öffnungen eines Abluftkanals anzubringende Leitvorrichtung dar, die insbesondere in sehr einfacher Weise den jeweiligen Strömungs- und Druckverhältnissen angepaßt werden kann, indem je nach Erfordernis mehr oder weniger Teile der die Öffnung des Doms zum Kanal teilweise verschließenden Drosselfläche längs der Sollbruchlinien weggebrochen werden. Es hat sich herausgestellt, daß der erfindungsgemäße Abluftdom eine im Vergleich zu bekannten Vorrichtungen minimale Störung der Strömungs- und Druckverhältnisse im Abluftkanal erbringt und daß es insbesondere möglich ist, durch vorherige Berechnung der längs des Abluftkanals auftretenden Druckverluste die Drosselfläche bereits fabrikseitig durch Wegbrechen von Teilen oder auch der gesamten Drosselfläche so einzustellen, daß die Absaugung durch sämtliche Abluftdome längs halb ist es nicht erforderlich, langwielige und harb ist es nicht erforderlich, langwierige und schwierige Abgleicharbeiten an Ort und Stelle bei den einzelnen Öffnungen eines eingebauten Abluftkanals vorzunehmen. Diese komplizierten Arbeiten können durch Verwendung der erfindungsgemäßen Abluftdome in Wegfall kommen.The exhaust dome according to the invention is a very easy to manufacture and just as easy to install in the openings of an exhaust duct, which can be adapted in a very simple manner to the respective flow and pressure conditions by, depending on the requirements, more or less parts of the opening of the dome Partially occluding throttle surface are broken away along the predetermined breaking lines. It has been found that the exhaust air dome according to the invention produces a minimal disturbance of the flow and pressure conditions in the exhaust air duct compared to known devices, and that it is possible, in particular by factory calculation of the pressure losses occurring along the exhaust air duct, at the factory by breaking off parts or also adjust the entire throttle area so that the suction through all exhaust air domes along half is not necessary, boring and hard it is not necessary to carry out tedious and difficult adjustment work on the spot at the individual openings of a built-in exhaust air duct. This complicated work can be eliminated by using the exhaust air domes according to the invention.

Die Herstellung des erfindungsgemäßen Abluftdoms ist einfach, so daß ohne Spezialeinrichtungen werkstattmäßig durchgeführt werden kann. Der Rechenaufwand bei der Bestimmung der Drosselflächengröße für den einzelnen Abluftdom ist so gering, daß er gegenüber dem Wegfall von Abgleicharbeiten für die einzelnen Abluftöffnungen nicht ins Gewicht fällt, Darüberhinaus ist, wie erwähnt, der an den einzelnen Abluftdomen auftretende Druckverlust außerordentlich gering.The production of the exhaust air dome according to the invention is simple, so that it can be carried out in the workshop without special equipment. The computing effort in determining the throttle area size for the individual exhaust air dome is so small that it is not significant compared to the omission of adjustment work for the individual exhaust air openings. In addition, as mentioned, the pressure loss occurring at the individual exhaust air domes is extremely small.

Anhand der Figuren werden Ausführungsbeispiele der Erfindung näher erläutert. Es zeigen:

  • Fig. 1 eine Schrägansicht eines erfindungsgemäßen Abluftdoms mit Einbaurahmen, wobei an eine Schmalseite und eine Längsseite je ein weiterer gleicher Abluftdom angesetzt ist, die jedoch nur teilweise dargestellt sind;
  • Fig. 2 enien schematischen Längsschnitt durch einen Abschnitt eines Abluftkanals mit einem eingesetzten Abluftdom;
  • Fig. 3 einen der Fig. 2 entsprechenden Längsschnitt mit angesetztem Stichkanal;
  • Fig. 4 eine schematische Darstellung zur Erläuterung der Steigung der Domfläche;
  • Fig. 5 bis 7 schematische Aufsichten auf verschiedene Ausführungsformen des Abluftdoms, wobei die Drosselflächen weggelassen sind;
  • Fig 8 eine der Fig. 4 entsprechende Darstellung des Abluftdoms mit angesetztem Einbaurahmen;
  • Fig. 9 eine der Fig. 5 entsprechende Darstellung mit eingezeichneter und teilweise ausgebrochener Drosselfläche;
  • Fig. 10 eine schematische Darstellung mehrerer mit ihren Schmalseiten aneinandergesetztpr Abluftdome; und
  • Fig. 11 eine schematische Darstellung mehrerer mit ihren Längsseiten aneinandergesetzter Abluftdome.
Exemplary embodiments of the invention are explained in more detail with the aid of the figures. Show it:
  • 1 shows an oblique view of an exhaust air dome according to the invention with a mounting frame, with another identical exhaust air dome each being attached to a narrow side and a long side, but these are only partially shown;
  • 2 shows a schematic longitudinal section through a section of an exhaust air duct with an inserted exhaust air dome;
  • FIG. 3 shows a longitudinal section corresponding to FIG. 2 with the branch channel attached;
  • 4 shows a schematic illustration to explain the slope of the dome surface;
  • 5 to 7 are schematic top views of different embodiments of the exhaust air dome, the throttle surfaces being omitted;
  • 8 shows a representation of the exhaust air dome corresponding to FIG. 4 with the mounting frame attached;
  • FIG. 9 shows a representation corresponding to FIG. 5 with the throttle surface drawn in and partially broken away;
  • 10 shows a schematic illustration of a plurality of exhaust air domes placed with their narrow sides; and
  • Fig. 11 is a schematic representation of several exhaust air domes placed with their long sides.

Der in Fig. 1 dargestellte Abluftdom 10 besteht aus einer über einer offenen rechteckigen Grundlfäche 12 sich wölbenden Domfläche 14, die vorzugsweise aus Eisenblech besteht, jedoch auch aus Aluminium, Messing, V2A-Stahl, Kunststoff od. dgl. hergestellt werden kann. Die Domfläche 14 geht an den beiden Längsseiten 16 und 18 und an einer Schmalseite 20 von der Grundfläche 12 aus und steigt bezüglich der Grundfläche ausgehend von der Schmalseite 20 bis zur gegenüberliegenden Schmalseite 22 gleichförmig an. Über der Schmalseite 22 bildet sie eine senkrecht zur Grundfläche 12 angeordnete portalartige Öffnung 24, die gemäß Fig. 5 oder Fig. 6 trapezförmig oder gemäß Fig. 7 von einer gekrümmten Linie umrandet sein kann. Grundsätzlich sind auch mehreckig umrandete Öffnungen anwendbar, jedoch sollte die Öffnung nicht rechteckig sein, da hierdurch die Strömungs-und Druckverhältnisse ungünstig beeinflußt werden.The exhaust air dome 10 shown in FIG. 1 consists of a domed surface 14 that bulges over an open rectangular base surface 12, which is preferably made of sheet iron, but can also be made of aluminum, brass, V2A steel, plastic or the like. The dome surface 14 starts on the two long sides 16 and 18 and on a narrow side 20 from the base surface 12 and rises uniformly with respect to the base surface starting from the narrow side 20 to the opposite narrow side 22. Above the narrow side 22, it forms a portal-like opening 24 arranged perpendicular to the base surface 12, which can be trapezoidal according to FIG. 5 or 6 or bordered by a curved line according to FIG. 7. In principle, openings with polygonal borders can also be used, but the opening should not be rectangular, since this has an adverse effect on the flow and pressure conditions.

Die Öffnung 24 ist bei der dargestellten Ausführungsform oben und an den Seiten von einem eingezogenen Rand 26 umgeben, an dem eine Drosselfläche 28 zweckmäßigerweise über geschwächte Sollbruchlinien befestigt ist. Die Drosselfläche selbst ist von mehreren parallel zur Schmalseite 22 der Grundfläche verlaufenden Sollbruchlinien 30 durchzogen, so daß die einzelnen durch die Soll- bruchlinien Felder 1, 2, 3, 4 (seihe Fig. 9) je nach Bedarf in dieser Reihenfolge herausgebrochen werden können. Als größte Öffnung des Abluftdoms ergibt sich bei der Ausführungsform gemäß Fig. 9 die nur mehr von dem Rand 26 umgebene Öffnung 0. Die Felder 1, 2, 3, 4 der Drosselfläche 28 werden der Reihe nach von oben nach unten ausgebrochen, so daß sich die Austrittsöffnung von oben nach unten vergrößert. in dieser Reihenfolge liegt der Vorteil, daß die durch die jeweils gebildete Austrittsöffnung austretende Luft den von der Domfläche 14 bestimmten Austrittswinkel unabgelenkt beibehalten kann.In the embodiment shown, the opening 24 is surrounded at the top and on the sides by a drawn-in edge 26, to which a throttle surface 28 is expediently fastened via weakened predetermined breaking lines. The throttling surface itself is crossed by several predetermined breaking lines 30 running parallel to the narrow side 22 of the base area, so that the individual fields 1, 2, 3, 4 (see FIG. 9) can be broken out in this order as required. In the embodiment according to FIG. 9, the largest opening of the exhaust air dome is the opening 0, which is only surrounded by the edge 26. The fields 1, 2, 3, 4 of the throttle surface 28 are broken out in order from top to bottom, so that the outlet opening enlarged from top to bottom. in this order there is the advantage that the air emerging through the respectively formed outlet opening can maintain the exit angle determined by the dome surface 14 undeflected.

Die größe Steigung des Abluftdoms 10 bezüglich der Grundfläche 12 hat bei der in Fig. 1 gezeigten trapezförmigen Ausführung die nach oben weisende Deckfläche 32. Sie schließt gemäß Fig. 4 mit der Grundfläche den Winkel a ein, der zwischen 10° und 45°, vorzugsweise zwischen 15° und 20° liegt. Bei einem gekrümmten Querschnitt des Doms gemäß Fig. 7 hätte diese größte Steigung nur die längs der vertikalen Mittelebene 34 verlaufende Mantellinie des Doms 10.In the trapezoidal embodiment shown in FIG. 1, the largest slope of the exhaust air dome 10 with respect to the base surface 12 has the upward-facing cover surface 32. According to FIG. 4, it includes the angle α with the base surface, which is preferably between 10 ° and 45 ° is between 15 ° and 20 °. In the case of a curved cross section of the dome according to FIG. 7, this greatest slope would only have the generatrix of the dome 10 running along the vertical central plane 34.

Rings um die Grundfläche 12 ist ein senkrecht nach unten von dieser abstehender Einbaurahmen 36 an der Domfläche 10 befestigt, der einen parallel zur Grundfläche 12 verlaufenden Befestigungsrand 38 trägt. Einbaurahmen 36 und Befestigungsrand 38 können je nach dem Querschnitt des Kanals und der Form der Abluftöffnung, in die der Abluftdom eingesetzt werden soll, abgeändert werden. Dadurch ist der erfindungsgemäße Abluftdom sehr einfach an rechteckige, runde oder sonstige Kanalformen anzupassen.A mounting frame 36 protruding vertically downward from the base surface 12 is fastened to the dome surface 10 and bears a fastening edge 38 running parallel to the base surface 12. Installation frame 36 and mounting edge 38 can be modified depending on the cross section of the duct and the shape of the exhaust air opening into which the exhaust air dome is to be inserted. As a result, the exhaust air dome according to the invention is very easy to adapt to rectangular, round or other duct shapes.

In Fig. 1 ist ferner gezeigt, wie einerseits an die eine Schmalseite 22 ein weiterer gleichartiger Abluftdom 10' und anderseits an die eine Längsseite 16 ein weiterer gleichartiger Abluftdom 10" angesetzt ist. Durch Zusammensetzen mehrerer gleichartiger Abluftdome können so beliebig große Öffnungen in der Kanalwand durch den erfindungsgemäßen Abluftdome überdeckt werden, wobei lediglich der Einbaurahmen entsprechend vergrößert werden muß, so daß er alle vorgesehenen Abluftdome umfaßt. Beispeile für das Hintereinandersetzen von drei Abluftdomen 10' und für das Nebeneinandersetzen von drei Abluftdomen 10" sind in der Fig. 10 bzw. 11 schematisch angedeutet.1 also shows how, on the one hand, another similar exhaust air dome 10 'is attached to one narrow side 22 and, on the other hand, another similar exhaust air dome 10 "is attached to one long side 16. By assembling several identical exhaust air domes, openings of any size can be made in the duct wall are covered by the exhaust air domes according to the invention, only the installation frame having to be enlarged accordingly, so that it comprises all the intended exhaust air domes. Examples for placing three exhaust air domes 10 'in series and for placing three exhaust air domes 10 "next to one another are shown in FIG. 11 indicated schematically.

In Fig. 2 ist in ebenfalls schematisch vereinfachter Weise gezeigt, wie ein Abluftdom 10 gemäß der Erfindung mit einem Einbaurahmen 36 und einem Befestigungsrand 38 in eine entsprechende Öffnung 40 einer ebenen Wandung 42 eines in Richtung des Pfeils 44 durchströmten Abluftkanals 46 eingesetzt ist. Innerhalb des Einbaurahmens ist ein an sich bekanntes Abluftgitter 48 eingesetzt, das mit seinem Rand 50 den Befestigungsrand 38 übergreift. Die Anbringung des Abluftgitters 48 ist somit durch den erfindungsgemäßen Abluftdom in keiner Weise behindert.FIG. 2 also shows in a schematically simplified manner how an exhaust air dome 10 according to the invention with a mounting frame 36 and a fastening edge 38 is inserted into a corresponding opening 40 in a flat wall 42 of an exhaust air duct 46 through which arrow 44 flows. An exhaust air grille 48, known per se, is inserted within the mounting frame and its edge 50 overlaps the fastening edge 38. The attachment of the exhaust air grille 48 is thus in no way hindered by the exhaust air dome according to the invention.

Falls aus irgendwelchen Gründen ein Stichkanal 52 (Fig. 3) mit am äußeren Ende eingesetztem Abluftgitter 48 an die Öffnung 40 angesetzt werden soll, kann dies ebenfalls ohne Behinderung durch den Abluftdom 10 erfolgen, indem der innere Rand 54 des Stichkanals 52 einfach von außen auf den Befestigungsrand 38 aufgesetzt wird.If, for any reason, a branch duct 52 (FIG. 3) with the exhaust air grille 48 inserted at the outer end is to be attached to the opening 40, this can also be done without obstruction by the exhaust duct 10 by simply opening the inner edge 54 of the branch duct 52 from the outside the mounting edge 38 is placed.

Wie aus Fig. 1 ersichtlich, schneiden vertikal auf der Grundfläche 12 und parallel zu den Schmalseiten 20 und 22 angeordnete Ebenen die Domfläche jeweils in trapezförmigen Linien. Stattdessen kann die Domfläche, wie erwähnt, auch so ausgebildet sein, daß die Schnittlinien mehreckig oder gemäß Fig. 7 durchgehend gekrümmt sind.As can be seen from FIG. 1, planes arranged vertically on the base surface 12 and parallel to the narrow sides 20 and 22 each cut the dome surface in trapezoidal lines. Instead, as mentioned, the dome surface can also be designed such that the cutting lines are polygonal or continuously curved according to FIG. 7.

Claims (3)

1. Exhaust air conduction device for installation in a wall opening of an exhaust air conduit, which device has a guide surface arranged over an open rectangular base surface, the said guide surface starting from a narrow side of the base surface and projecting into the interior of the conduit, and the maximum inclination of the guide surface relative to the base surface being between 10° and 45°, characterised in that the guide surface is formed as an arched dome surface (14) which forms, in all planes running perpendicular to the base surface (12) and parallel to its narrow sides (20, 22), curved, trapezoidal or polygonal one-piece intersection lines starting from the two long sides (16, 18) of the base surface (12), and in that the front side of the exhaust air conduction device arranged over one narrow side (22) of the base surface (12) perpendicular to the base surface is formed as a throttling or regulating surface (28) broken partially or completely longitudinally by predetermined breaking lines (30) running parallel to this narrow side (22).
2. Exhaust air conduction device according to Claim 1, characterised in that an installation frame (36) arranged essentially perpendicular to the base surface (12) together with a fastening edge run round the base surface (12) associated with the dome surface (14).
3. Exhaust air conduction device according to Claim 1 or 2, characterised in that two or more exhaust air conduction devices (10', 10") are juxtaposed in the same direction via in each case a long side (Fig. 11) and/or a narrow side (Fig. 10) of their base surface (12).
EP78101606A 1977-12-21 1978-12-08 Air louver for an exhaust air duct Expired EP0002701B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2757060 1977-12-21
DE2757060A DE2757060C3 (en) 1977-12-21 1977-12-21 Exhaust air guiding device

Publications (2)

Publication Number Publication Date
EP0002701A1 EP0002701A1 (en) 1979-07-11
EP0002701B1 true EP0002701B1 (en) 1981-04-08

Family

ID=6026771

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78101606A Expired EP0002701B1 (en) 1977-12-21 1978-12-08 Air louver for an exhaust air duct

Country Status (7)

Country Link
EP (1) EP0002701B1 (en)
JP (1) JPS5811542B2 (en)
AT (1) AT385585B (en)
DE (1) DE2757060C3 (en)
DK (1) DK571678A (en)
ES (1) ES476172A1 (en)
NO (1) NO145852C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3013147C2 (en) * 1980-04-03 1983-02-17 Siemens AG, 1000 Berlin und 8000 München Exhaust air light for a negative pressure ceiling
US5736056A (en) * 1995-04-28 1998-04-07 Betzdearborn Inc. Method for enhancing biocidal activity

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7043863U (en) * 1971-04-29 Schneider G Inlet and exhaust air grilles for ventilation systems
DE24919C (en) * F. PELZER in Dortmund Ventilation curtains or flaps
FR704959A (en) * 1930-01-24 1931-05-29 Anciens Etablissements Grouvel Device for the introduction of vapor into a liquid
DE1779163U (en) * 1958-10-21 1958-12-11 Trox Gmbh Geb AIR GRILLE WITH RECTANGULAR FRAME.
CH384173A (en) * 1961-02-14 1964-11-15 Keller Alois Exhaust connection
DE1901790U (en) * 1964-07-02 1964-10-08 Schako Ferd Schad G M B H Meta DEVICE FOR REGULATING AIR CONDITIONING SYSTEMS USING A PIVOTING QUANTITY ADJUSTMENT.
JPS4830938U (en) * 1971-08-16 1973-04-16
DE2417582C3 (en) * 1974-04-08 1978-10-05 Eternit Ag, 1000 Berlin Ventilation duct element
CH584872A5 (en) * 1974-10-22 1977-02-15 Luwa Ag

Also Published As

Publication number Publication date
JPS5494742A (en) 1979-07-26
NO784309L (en) 1979-06-22
ES476172A1 (en) 1979-05-16
DE2757060A1 (en) 1979-06-28
DE2757060C3 (en) 1981-12-10
DK571678A (en) 1979-06-22
NO145852C (en) 1982-06-09
NO145852B (en) 1982-03-01
JPS5811542B2 (en) 1983-03-03
EP0002701A1 (en) 1979-07-11
ATA902078A (en) 1987-09-15
DE2757060B2 (en) 1980-04-30
AT385585B (en) 1988-04-25

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