EP0263333B1 - Outlet for a vortex air flow - Google Patents
Outlet for a vortex air flow Download PDFInfo
- Publication number
- EP0263333B1 EP0263333B1 EP87113532A EP87113532A EP0263333B1 EP 0263333 B1 EP0263333 B1 EP 0263333B1 EP 87113532 A EP87113532 A EP 87113532A EP 87113532 A EP87113532 A EP 87113532A EP 0263333 B1 EP0263333 B1 EP 0263333B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air outlet
- rotary
- type air
- outer cylinder
- air
- 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
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- 230000000717 retained effect Effects 0.000 claims 1
- 238000001914 filtration Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
- F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
Definitions
- the innovation relates to a swirl air outlet with an air box with supply air nozzle and with an air outlet tube, in which guide vanes are arranged to generate a swirl.
- a swirl air outlet of the type mentioned is known, in which two telescopically interlocking perforated tubes are arranged centrally in the air outlet tube provided with the outlet nozzle and extend axially to the tube.
- the swirl sensor is fastened, while the closed end of the smaller-diameter pipe is fastened to the housing of the air outlet by means of a threaded bolt penetrating the closed bottom of the air outlet tube.
- the perforated tubes are filled with a sound absorbing material. The position of the swirl generator with respect to the outlet nozzle can be adjusted axially by changing the telescope intervention.
- the perforated tubes with the swirl sensor on the one hand and the air outlet tube on the other hand can be removed from the housing.
- swirl diffusers are used in areas where there are increased demands on air purity - for example in clean rooms or clean rooms Work areas with lower air purity requirements - however, problems arise from the fact that the air filters used to clean the supply air are arranged in the air treatment system.
- the connection from the air treatment system to the individual air outlets takes place via pipelines in which there is generally a negative pressure due to the high flow velocity of the air. This negative pressure is particularly pronounced if - as usual - the clean rooms are kept under positive pressure and the positive pressure propagates into the installation rooms that are regularly provided above suspended ceilings. Leakages in the pipelines that can never be avoided then lead to the sucking in of contaminated air from the installation rooms, so that even high-quality filtered supply air is subsequently contaminated again.
- the outlet tube provided with the outflow nozzle and the swirler is provided with a filter insert as a unit, the unit being interchangeable and being fastened to the housing of the air outlet with fastening means.
- the filter insert is designed as a filter cartridge, the inner cylinder of which has a diameter which corresponds approximately to that of the outer tube.
- This design ensures that the air is passed from the inside of the filter cartridge into the outlet tube without impact loss.
- the swirl sensor which is fastened with a crossbeam, with a tripod or with a cross in the air outlet tube, can serve as a height stop.
- a bayonet attachment of the air outlet tube is preferably made possible in a simple manner via a tripod.
- the filter cartridge which is closed on one side with a cover and provided with filter medium arranged between the inner cylinder and an outer cylinder, has at the air outlet end an annular cover connecting the inner cylinder and the outer cylinder and covering the filter medium arranged therebetween, which protrudes beyond the radius of the outer cylinder the fasteners cooperates.
- This outstanding cover makes it easy to attach the entire insert with the filter cartridge and outlet tube to the housing of the air outlet.
- the fastening means are designed as at least three screw bottles distributed over the circumference, which are supported on one side against the housing or connected to it and which can be tightened by means of nuts which are provided on screws fastened to the housing and guided through holes in the screw tabs are, each screw tab is assigned a screw with at least one nut.
- This embodiment ensures that the fastening means can be retightened as screw means, that the fastening means are not connected directly to the housing and that the support a good force distribution can be achieved. It is advisable to support the non-cutting side of the fastening tabs so that the clamping height of the overhanging edge to be tensioned is reached.
- the screw tabs be designed as an angle profile sections, the height of which corresponds to the height of the right-angled bend of the annular cover.
- the air outlet 10 consists essentially of the housing 11 surrounding the air box, which is closed with an upper cover 12. Fasteners such as rivets, screws or welded connections, indicated at 12.1, hold the lid on the housing.
- the end of the housing 11 opposite the cover 12 is provided with a circumferential ring, so that an air outlet opening is created.
- the filter insert 14 provided with the outflow tube 17 is inserted into this air outlet opening.
- the filter insert 14 consists of an outer cylinder 14.1 and an inner cylinder 14.2, between which the filter medium 15 is arranged.
- This filter medium is usually provided with axially extending folds which fill the space between the two air-permeable cylinders, preferably perforated sheet metal or expanded metal.
- the filter cartridge 14 is covered on one side with the cover 16.1, while the other side remains open as the air outlet side.
- the filter cartridge 14 thus formed protrudes into the air box of the air outlet 10, into which air of the supply air system flows through the tangential inlet opening 13. It goes without saying that supply air openings in the area of the cover plate 12 or other air supplies are also possible.
- the air outlet end of the filter cartridge 14 is provided in the area of the inner and outer cylinders with an annular cover 16.2, which covers the filter medium on this side.
- This annular cover 16.2 projects beyond the outer cylinder 14.1 and is bent at a distance from it at a right angle so that the standing edge points in the direction of the air outlet.
- Fastening tabs 11.1 supported against the housing 11, designed as individual angular profile pieces, are pressed by means of the screw 11.2 against the web edge of the annular cover, with the housing 11, near the inner edge which is bent inward for stability reasons and delimits the air outlet opening, and the projecting part of the cover ring 16.2 the seal 16.3 is arranged.
- the bracket 19 shown as a cross-member carries, via the bolt 19.1 and on this height-adjustable, the swirl sensor 18, which is formed from individual, in one sense, twisted vanes 18.1. These guide vanes are generally set at the same angle, so that the air exiting is given a uniform swirl. In special cases, however, it is also possible to adjust the angle of each of the guide vanes 18.1 in accordance with the requirements.
- the bolt 19.1 is shown as a screw bolt which is fixed in the crossbar 19 by means of the nuts 19.2, the height of the bolt 19.1 being displaced relative to the crossbar 19 when the nuts are loosened and can be fixed by tightening the nuts 19.2.
- Another height adjustability is given by the fact that the swirl sensor 18 is height-adjustable by means of nuts 19.3 on the bolt 19.1 and can be fixed in its height setting.
- the outflow tube 17, the lower end of which is designed as an outflow nozzle 17.1, is placed on the projecting part of the inner cylinder 14.3 of the filter cartridge.
- the lower edge of the outlet opening 17.1 advantageously closes with the lower edge of the suspended ceiling 20.
- the filter area must be increased in accordance with the air flow to be blown out. This can initially be done by increasing the number of folds until a fold density that can no longer be exceeded is reached.
- the depth of the folds can also be increased, whereby - for a given diameter of the inner cylinder - the diameter of the outer cylinder increases. However, this also requires a larger opening in the housing of the air outlet. In order to carry out a further enlargement of the filter area, it is advisable to increase the height of the filter cartridge, but this also increases the height of the air outlet.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
- Air-Flow Control Members (AREA)
- Percussion Or Vibration Massage (AREA)
- Devices For Medical Bathing And Washing (AREA)
- Nozzles (AREA)
- Duct Arrangements (AREA)
Abstract
Description
Die Neuerung betrifft einen Drall-Luftauslaß mit Luftkasten mit Zuluftstutzen sowie mit Luftauslaßtubus, in dem Leitschaufeln zur Erzeugung eines Dralls angeordnet sind.The innovation relates to a swirl air outlet with an air box with supply air nozzle and with an air outlet tube, in which guide vanes are arranged to generate a swirl.
Drall-Luftauslässe haben sich für viele Aufgaben der Lüftungstechnik durchgesetzt. So lassen sich turbulenzreiche Mischströmungen in einfacher Weise erzeugen, ohne daß im wesentlichen durch überlange Kernlänge eines austretenden Freistrahls bedingte Zugerscheinungen auftreten.Swirl air outlets have prevailed for many ventilation technology tasks. In this way, turbulent mixed flows can be generated in a simple manner without the occurrence of drafts which are essentially caused by the excessively long core length of an emerging free jet.
Aus der US-A-2738719 ist ein Drall-Luftauslaß der genannten Art bekannt, bei dem in dem mit der Auslaßdüse versehenen Luftauslaßtubus mittig zwei teleskopisch ineinander greifende perforierte Rohre angeordnet sind, die sich axial zum Tubus erstrecken. Am unteren Ende des Rohres größeren Durchmessers ist der Drallgeber befestigt, während das geschlossene Ende des Rohres kleineren Durchmessers mittels eines den geschlossenen Boden des Luftauslaßtubus durchgreifenden Gewindebolzens am Gehäuse des Luftauslasses befestigt ist. Die perforierten Rohre sind mit einem schallabsorbierenden Material gefüllt. Durch Veränderung des Teleskopeingriffes kann die Lage des Drallgebers bezüglich der Auslaßdüse axial verstellt werden. Nach Lösung des Gewindeeingriffes können die perforierten Rohre mit dem Drallgeber einerseits und der Luftauslaßtubus andererseits aus dem Gehäuse entfernt werden.
Werden derartige Drallauslässe in Bereichen eingesetzt, in denen erhöhte Anforderungen an die Luftreinheit gestellt werden - etwa in Reinen Räumen oder Reinen Arbeitsbereichen mit geringeren Anforderungen an die Luftreinheit - ergeben sich jedoch Probleme dadurch, daß die zur Reinigung der Zuluft eingesetzten Luftfilter in der Luftaufbereitungsanlage angeordnet sind. Die Verbindung von der Luftaufbereitungsanlage zu den einzelnen Luftauslässen geschieht über Rohrleitungen, in denen wegen der hohen Strömungsgeschwindigkeit der Luft in aller Regel Unterdruck herrscht. Dieser Unterdruck ist besonders dann ausgeprägt, wenn - wie üblich - die Reinen Räume unter Überdruck gehalten werden und der Überdruck sich in die regelmäßig oberhalb abgehängter Decken vorgesehenen Installationsräume fortpflanzt. Nie zu vermeidende Undichtigkeiten in den Rohrleitungen führen dann zu einem Einsaugen verunreinigter Luft aus den Installationsräumen, so daß selbst hochwertig gefilterte Zuluft nachträglich wieder verunreinigt wird.From US-A-2738719 a swirl air outlet of the type mentioned is known, in which two telescopically interlocking perforated tubes are arranged centrally in the air outlet tube provided with the outlet nozzle and extend axially to the tube. At the lower end of the larger-diameter pipe, the swirl sensor is fastened, while the closed end of the smaller-diameter pipe is fastened to the housing of the air outlet by means of a threaded bolt penetrating the closed bottom of the air outlet tube. The perforated tubes are filled with a sound absorbing material. The position of the swirl generator with respect to the outlet nozzle can be adjusted axially by changing the telescope intervention. After loosening the thread, the perforated tubes with the swirl sensor on the one hand and the air outlet tube on the other hand can be removed from the housing.
If such swirl diffusers are used in areas where there are increased demands on air purity - for example in clean rooms or clean rooms Work areas with lower air purity requirements - however, problems arise from the fact that the air filters used to clean the supply air are arranged in the air treatment system. The connection from the air treatment system to the individual air outlets takes place via pipelines in which there is generally a negative pressure due to the high flow velocity of the air. This negative pressure is particularly pronounced if - as usual - the clean rooms are kept under positive pressure and the positive pressure propagates into the installation rooms that are regularly provided above suspended ceilings. Leakages in the pipelines that can never be avoided then lead to the sucking in of contaminated air from the installation rooms, so that even high-quality filtered supply air is subsequently contaminated again.
Hier setzt die Neuerung ein, der die Aufgabe zugrunde liegt Drall-Luftauslässe der bekannten Bauart so weiter zu bilden, daß mit der Luft zum Ausblas gelangende Verunreinigungen dort abgeschieden werden, die zur Abscheidung eingesetzten Filter problemlos betrieben, gewartet und gewechselt werden können und die zu ersetzenden Teile als Einheit einfach und wirtschaftlich herstellbar sind.This is where the innovation comes in, which is based on the task of further developing swirl air outlets of the known type so that impurities which come to be blown out are separated there, the filters used for separation can be operated, maintained and changed without any problems and which too replacing parts as a unit are simple and economical to manufacture.
Die Aufgabe wird dadurch gelöst, daß der mit der Ausströmdüse und dem Drallgeber versehene Auslaßtubus mit einem Filtereinsatz versehen als Einheit ausgebildet ist, wobei die Einheit auswechselbar ist und mit Befestigungsmitteln am Gehäuse des Luftauslasses befestigbar ist. Durch diese Ausbildung wird eine einfache Endfilterung der Zuluft erreicht, wobei das Filter unmittelbar vor dem Luftausläß angeordnet ist, so daß die gefilterte, in den zu belüftenden Raum ausströmende Luft keine Möglichkeit zur Aufnahme von Verunreinigungen aus dem Installationsgeschoß oder dem Deckenzwischenraum mehr hat. Die Auswechselung von Filter und Zulufttubus mit Drallgeber als Einheit erleichtert die Wartungsarbeiten, wobei der Austausch des Filters an der ausgewechselten Einheit später erfolgen kann, wenn nicht die gesamte Einheit verworfen wird. Bei dieser Art des Wechselns entfällt die durch die immer unvollständige Filterung der Zuluft von Zeit zu Zeit notwendig werdende Reinigung des Auslaßtubus und des Drallgebers, wobei zu beachten ist, daß diese Verschmutzung in einer Filterstandzeit keine gravierenden Werte annimmt.The object is achieved in that the outlet tube provided with the outflow nozzle and the swirler is provided with a filter insert as a unit, the unit being interchangeable and being fastened to the housing of the air outlet with fastening means. Through this design, a simple final filtering of the supply air is achieved, the filter being arranged directly in front of the air outlet, so that the filtered air flowing out into the room to be ventilated no longer has the possibility of picking up impurities from the installation floor or the ceiling space. Replacing the filter and supply air tube with swirl unit as a unit simplifies maintenance work, with the filter being replaced on the replaced one Unity can occur later if the entire unit is not discarded. With this type of change, the incomplete filtering of the supply air means that it is not necessary to clean the outlet tube and the swirler from time to time.However, it should be noted that this contamination does not assume any serious values during a filter service life.
Eine Weiterbildung ist dadurch gegeben, daß der Filtereinsatz als Filterpatrone ausgebildet ist, deren Innenzylinder einen Durchmesser aufweist, der etwa dem des Außentubus entspricht. Durch diese Ausbildung wird ein stoßverlustfreier Übertritt der Luft aus dem Inneren der Filterpatrone in den Auslaßtubus erreicht. Für die Herstellung und einen eventl. später erfolgenden Austausch des Filters ergibt sich darüber hinaus eine Zentriermöglichkeit, wenn der Innenzylinder die Filterpatrone an der Luftaustrittsseite überragt und der Luftaustrittstubus mit geringem Spiel über diesen Überstand geführt werden kann. Es versteht sich von selbst, daß der Drallgeber, der mit einer Traverse, mit einem Dreibein oder mit einem Kreuz im Luftauslaßtubus befestigt ist als Höhenanschlag dienen kann. Ebenso versteht es sich von selbst, daß im Zusammenhang mit der Befestigung des Drallgebers vorzugsweise über ein Dreibein eine Bajonettbefestigung des Luftauslaßtubus in einfacher Weise ermöglicht wird.A further development is given in that the filter insert is designed as a filter cartridge, the inner cylinder of which has a diameter which corresponds approximately to that of the outer tube. This design ensures that the air is passed from the inside of the filter cartridge into the outlet tube without impact loss. For the production and a eventl. If the filter is replaced later, there is also a possibility of centering if the inner cylinder protrudes beyond the filter cartridge on the air outlet side and the air outlet tube can be guided over this projection with little play. It goes without saying that the swirl sensor, which is fastened with a crossbeam, with a tripod or with a cross in the air outlet tube, can serve as a height stop. Likewise, it goes without saying that in connection with the attachment of the swirl device, a bayonet attachment of the air outlet tube is preferably made possible in a simple manner via a tripod.
Weiter wird vorgeschlagen, daß die mit einem Deckel einseitig verschlossene und mit zwischen dem Innenzylinder und einem Außenzylinder angeordneten Filtermedium versehene Filterpatrone am Luftauslaßende eine den Innenzylinder und den Außenzylinder verbindende, das dazwischen angeordnete Filtermedium abdeckende ringförmige Abdeckung aufweist, die über den Radius des Außenzylinders ragend mit den Befestigungsmitteln zusammenwirkt. Durch diese überragende Abdeckung wird in einfacher Weise die Möglichkeit geschaffen den gesamten Einsatz mit Filterpatrone und Auslaßtubus am Gehäuse des Luftauslasses zu befestigen.It is further proposed that the filter cartridge, which is closed on one side with a cover and provided with filter medium arranged between the inner cylinder and an outer cylinder, has at the air outlet end an annular cover connecting the inner cylinder and the outer cylinder and covering the filter medium arranged therebetween, which protrudes beyond the radius of the outer cylinder the fasteners cooperates. This outstanding cover makes it easy to attach the entire insert with the filter cartridge and outlet tube to the housing of the air outlet.
Dabei bieten sich verschiedene Lösungen an, wie etwa schraubbare Befestigungsmittel oder klemmende Befestigungsmittel nach Art eines Bajonettverschlusses.Various solutions are available, such as screwable fasteners or clamping fasteners in the manner of a bayonet lock.
Ein weiterer Vorschlag geht dahin, daß der nach außen überstehende Teil der ringförmigen Abdeckung im Abstand vom Außenzylinder rechtwinklig abgekantet und von den Befestigungsmitteln übergriffen ist. Durch diese Abkantung entsteht eine umlaufende Stehkante, an der die Befestigungsmittel,die mit Schrauben oder Federn den Andruck bewirken, angreifen. Durch den Abstand der Abkantung vom Außenzylinder wird darüber hinaus ein gegen das Gehäuse des Luftauslasses sich anlegender Ring enthalten, mit dessen Hilfe die Abdichtung des Einsatzes erreicht wird. In diesem Zusammenhang wird darüber hinaus vorgeschlagen, daß eine Ringdichtung zwischen dem Gehäuse und dem, den Außenzylinder der Filterpatrone überragenden Teil der ringförmigen Abdeckung angeordnet ist. Durch diese Lage der Dichtung wirken die Befestigungsmittel gleichzeitig als Anpreßmittel, so daß mittels Nachstellen der Befestigungsmittel die Dichtwirkung verbessert werden kann. Die Dichtung wird zweckmäßigerweise als Rundschnurdichtung oder als Dachprofil-Dichtung ausgeführt; in beiden Fällen ergeben sich bei noch nicht zu hohen Anpreßkräften bereits durch die linienhafte Berührung hinreichende Dicht-Drücke, die die Dichtheit des Einsatzes bewirken.Another proposal is that the outwardly projecting part of the annular cover is bent at right angles at a distance from the outer cylinder and overlapped by the fastening means. This fold creates a circumferential standing edge on which the fasteners, which cause the pressure with screws or springs, attack. Due to the distance of the bevel from the outer cylinder, a ring that bears against the housing of the air outlet is also contained, with the aid of which the insert is sealed. In this context, it is also proposed that an annular seal be arranged between the housing and the part of the annular cover which projects beyond the outer cylinder of the filter cartridge. Due to this position of the seal, the fastening means simultaneously act as a pressing means, so that the sealing effect can be improved by adjusting the fastening means. The seal is expediently designed as a round cord seal or as a roof profile seal; in both cases, if the contact forces are not yet too high, the linear contact already results in sufficient sealing pressures, which bring about the tightness of the insert.
In einer bevorzugten Ausführungsform sind die Befestigungsmittel als mindestens drei über den Umfang verteilte Schraubflaschen ausgebildet, die einseitig gegen das Gehäuse abgestützt oder mit ihm verbunden sind und die mittels Muttern, die auf am Gehäuse befestigten und durch Löcher in den Schraublaschen geführten Schrauben vorgesehen sind, anziehbar sind, wobei jeder Schraublasche eine Schraube mit mindestens einer Mutter zugeordnet ist. Durch diese Ausführungsform wird erreicht, daß die Befestigungsmittel als Schraubmittel nachziehbar sind, daß die Befestigungsmittel nicht direkt mit dem Gehäuse verbunden sind und daß durch das Abstützen eine gute Kraftverteilung erreicht werden kann. Zweckmäßig ist es dabei auf der nicht spanenden Seite der Befestigungslaschen diese so zu unterfüttern, daß die Spannhöhe des zu spannenden, überstehenden Randes erreicht wird. In diesem Zusammenhang wird vorgeschlagen, daß die Schraublaschen als Winkelprofil-Abschnitte ausgebildet sind, deren Höhe der Höhe der rechtwinkligen Abkantung der ringförmigen Abdeckung entspricht. Durch diese Ausbildung stützt sich der eine Schenkel des Winkels des Winkelprofils gegen das Gehäuse ab, während - wegen der Höhengleichheit - der andere Schenkel auf die Stegkante des Abdeckringes drückt. Durch die zwischengelegte Dichtung ergibt sich dabei ein das Spannen begünstigender Spannweg.In a preferred embodiment, the fastening means are designed as at least three screw bottles distributed over the circumference, which are supported on one side against the housing or connected to it and which can be tightened by means of nuts which are provided on screws fastened to the housing and guided through holes in the screw tabs are, each screw tab is assigned a screw with at least one nut. This embodiment ensures that the fastening means can be retightened as screw means, that the fastening means are not connected directly to the housing and that the support a good force distribution can be achieved. It is advisable to support the non-cutting side of the fastening tabs so that the clamping height of the overhanging edge to be tensioned is reached. In this context, it is proposed that the screw tabs be designed as an angle profile sections, the height of which corresponds to the height of the right-angled bend of the annular cover. Through this design, one leg of the angle of the angle profile is supported against the housing, while - because of the same height - the other leg presses on the web edge of the cover ring. The interposed seal results in a tensioning path that favors tensioning.
Das Wesen der Neuerung wird anhand der Figuren 1 und 2 näher erläutert. Dabei zeigen
- Fig. 1
- einen schematischen Querschnitt durch den Luftauslaß und
- Fig. 2
- einen Schnitt entsprechend der Schnittlinie II-II (Fig. 1).
- Fig. 1
- a schematic cross section through the air outlet and
- Fig. 2
- a section along the section line II-II (Fig. 1).
Der Luftauslaß 10 besteht im wesentlichen aus dem den Luftkasten umschließenden Gehäuse 11, das mit einem oberen Deckel 12 verschlossen ist. Befestigungsmittel wie Nieten, Schrauben oder Schweißverbindungen, angedeutet bei 12.1, halten den Deckel auf dem Gehäuse. Das dem Deckel 12 gegenüberliegende Ende des Gehäuses 11 ist mit einem umlaufenden Ring versehen, so daß eine Luftaustrittsöffnung entsteht. In diese Luftaustrittsöffnung wird der mit dem dem Ausströmtubus 17 versehene Filtereinsatz 14 eingesetzt.The
Der Filtereinsatz 14 besteht aus einem Außenzylinder 14.1 und einem Innenzylinder 14.2, zwischen denen das Filtermedium 15 angeordnet ist. Dieses Filtermedium ist in aller Regel mit axial verlaufenden Falten versehen, die den Zwischenraum zwischen beiden luftdurchlässigen Zylindern, vorzugsweise Lochblech oder Streckmetall, ausfüllen. Einseitig ist die Filterpatrone 14 abgedeckt mit dem Deckel 16.1, während die andere Seite als Luftaustrittsseite offen bleibt. Die so gebildete Filterpatrone 14 ragt in den Luftkasten des Luftauslasses 10, in den durch die tangentiale Eintrittsöffnung 13 Luft der Zuluftanlage einströmt. Es versteht sich von selbst, daß auch Zuluftöffnungen im Bereich der Deckplatte 12 oder andere Luftzuführungen möglich sind.The
Das luftaustrittsseitige Ende der Filterpatrone 14 ist im Bereich von Innen- und Außenzylinder mit einer ringförmigen Abdeckung 16.2 versehen, die das Filtermedium nach dieser Seite hin abdeckt. Diese ringförmige Abdeckung 16.2 überragt den Außenzylinder 14.1 und ist im Abstand von diesem rechtwinklig so abgekantet, daß die Stehkante in Richtung des Luftaustrittes weist. Gegen das Gehäuse 11 abgestützte Befestigungslaschen 11.1, als einzelne Winkelprofilstücke ausgebildet, werden mittels der Schraube 11.2 gegen die Stegkante der ringförmigen Abdeckung gepreßt, wobei zwischen dem Gehäuse 11, nahe dem aus Stabilitätsgründen nach innen umgekanteten, die Luftaustrittsöffnung begrenzenden Innenrand und dem überstehenden Teil des Abdeckringes 16.2 die Dichtung 16.3 angeordnet ist. Die als Quertraverse dargestellte Halterung 19 trägt über den Bolzen 19.1 und auf diesen höhenverstellbar den Drallgeber 18, der aus einzelnen, in einem Sinne verdrehten Leitschaufeln 18.1 gebildet ist. Diese Leitschaufeln sind in aller Regel im gleichen Winkel angestellt, so daß der austretenden Luft ein einheitlicher Drall erteilt wird. In besonderen Fällen ist es jedoch auch möglich die Winkelanstellung jeder einzelnen der Leitschaufeln 18.1 den Erfordernissen entsprechend zu justieren. In der Darstellung ist der Bolzen 19.1 als Schraubbolzen dargestellt, der mittels der Muttern 19.2 in der Quertraverse 19 fixiert ist, wobei bei gelösten Muttern der Bolzen 19.1 gegenüber der Quertraverse 19 in seiner Höhe verschoben und durch Festziehen der Muttern 19.2 fixiert werden kann. Eine weitere Höhenverstellbarkeit ist dadurch gegeben, daß der Drallgeber 18 mittels Muttern 19.3 auf dem Bolzen 19.1 höhenverstellbar und in seiner Höheneinstellung fixierbar befestigt ist.The air outlet end of the
Auf den überstehenden Teil des Innenzylinders 14.3 der Filterpatrone aufgesetzt ist der Ausströmtubus 17, dessen unteres Ende als Ausströmdüse 17.1 ausgebildet ist. Beim Einsatz in Räumen mit abgehängten Decken schließt die Unterkante der Austrittsöffnung 17.1 vorteilhafterweise mit der Unterkante der abgehängten Decke 20 ab.The
Bei der Auswahl des Filtermediums 15 sind die an die Filterung zu stellenden Anforderungen zu beachten. Da mit steigenden Anforderungen die Strömungsgeschwindigkeit der Luft durch das Filtermedium zurückgenommen werden muß, muß die Filterfläche entsprechend dem auszublasenden Luftstrom vergrößert werden. Dies kann zunächst durch Vergrößerung der Zahl der Falten geschehen, bis eine nicht mehr zu überschreitende Faltendichte erreicht wird. Darüber hinaus kann die Tiefe der Falten ebenfalls vergrößert werden, wobei - bei gegebenem Durchmesser des Innenzylinders - sich der Durchmesser des Außenzylinders vergrößert. Dies bedingt jedoch auch eine größere Öffnung im Gehäuse des Luftauslasses. Um eine weitere Vergrößerung der Filterfläche durchzuführen bietet sich eine Vergrößerung der Höhe der Filterpatrone an, wodurch allerdings die Höhe des Luftauslasses ebenfalls vergrößert wird. Durch eine Kombination aller drei Maßnahmen lassen sich jedoch in aller Regel auch für extreme Anforderungen Luftauslässe nach der Neuerung bauen, die den Anforderungen sowohl aus filtertechnischer Sicht als auch aus strömungstechnischer Sicht gerecht werden.When selecting the filter medium 15, the requirements to be met by the filtering must be observed. Since the flow velocity of the air through the filter medium has to be reduced with increasing requirements, the filter area must be increased in accordance with the air flow to be blown out. This can initially be done by increasing the number of folds until a fold density that can no longer be exceeded is reached. In addition, the depth of the folds can also be increased, whereby - for a given diameter of the inner cylinder - the diameter of the outer cylinder increases. However, this also requires a larger opening in the housing of the air outlet. In order to carry out a further enlargement of the filter area, it is advisable to increase the height of the filter cartridge, but this also increases the height of the air outlet. By combining all three measures, however, air outlets according to the innovation can generally also be built for extreme requirements, which meet the requirements both from a filtering point of view and from a fluidic point of view.
Claims (8)
- A rotary-type air outlet having an air box (11, 12) with an inlet air socket (13) and having an air outlet tube (17) in which guide blades (18.1) for generating a rotation are arranged, characterised in that the outlet tube (17) provided with an outflow nozzle (17.1) and the rotor (18) is constructed as a unit provided with a filter element (14), the unit being replaceable and capable of being fastened to the casing (11) of the air outlet (10) by means of fasteners (11.1, 11.2).
- A rotary-type air outlet according to claim 1, characterised in that the filter element is constructed as a filter cartridge whose inner cylinder (14.2) has a diameter which corresponds approximately to that of the outlet tube (17).
- A rotary-type air outlet according to claim 2, characterised in that at the air outlet end the filter cartridge, which is closed at one end by a lid (16.1) and provided with a filter medium (15) arranged between the inner cylinder (14.2) and an outer cylinder (14.1), has an annular cover (16.2), which connects the inner cylinder (14.2) and the outer cylinder (14.1) and covers the filter medium (15) arranged therebetween and, projecting beyond the radius of the outer cylinder, cooperates with the fasteners.
- A rotary-type air outlet according to claim 3, characterised in that the part of the annular cover (16.2) projecting outwards is bent at right angles at a distance from the outer cylinder (14.1) and overlapped by the fasteners.
- A rotary-type air outlet according to claim 3 or 4, characterised in that a ring seal (16.3) is arranged between the casing (11) and the part of the annular cover (16.2) which projects beyond the outer cylinder (14.1) of the filter cartridge.
- A rotary-type air outlet according to one of claims 1 to 5, characterised in that the fasteners are constructed as at least three screw lugs (11.1) distributed over the circumference, which are supported on one side against the casing or are connected to it and can be tightened by means of nuts, which are provided on screws that are fastened to the casing (11) and guided through holes in the screw lugs (11.1), a screw (11.2) with at least one nut being assigned to each screw lug (11.1).
- A rotary-type air outlet according to claim 6, characterised in that the screw lugs (11.1) are constructed as angle sections whose height corresponds to the height of the right-angled bend of the annular cover (16.2).
- A rotary-type air outlet according to one of claims 1 to 7, characterised in that the rotor (18) provided with guide blades (18.1) is retained coaxially in the outlet tube (17) by retaining means (19, 19.1), the rotor (18) being axially adjustable and capable of being fixed in the adjusted position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT87113532T ATE68584T1 (en) | 1986-10-10 | 1987-09-16 | SWIVEL AIR OUTLET. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8626929U DE8626929U1 (en) | 1986-10-10 | 1986-10-10 | Swirl - air outlet |
| DE8626929U | 1986-10-10 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0263333A2 EP0263333A2 (en) | 1988-04-13 |
| EP0263333A3 EP0263333A3 (en) | 1989-03-08 |
| EP0263333B1 true EP0263333B1 (en) | 1991-10-16 |
Family
ID=6799040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87113532A Expired - Lifetime EP0263333B1 (en) | 1986-10-10 | 1987-09-16 | Outlet for a vortex air flow |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0263333B1 (en) |
| AT (1) | ATE68584T1 (en) |
| DE (2) | DE8626929U1 (en) |
| ES (1) | ES2026878T3 (en) |
| GR (1) | GR3003464T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4301757C1 (en) * | 1993-01-23 | 1994-05-05 | Kesslertech Gmbh | Floor- or ceiling-outlet for ventilation air - has perforated cover plate and swirl-inducer with blade-pitch |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3941899A1 (en) * | 1989-12-19 | 1991-06-20 | Kessler & Luch Gmbh | AIR PERFORMANCE WITH FILTER |
| DE4039542A1 (en) * | 1990-12-11 | 1992-06-17 | Kessler & Luch Gmbh | DEVICE FOR INLETING AIR IN ROOMS AND HALLS AND METHOD FOR THEIR OPERATION |
| DE4105905A1 (en) * | 1991-02-26 | 1992-08-27 | Kesslertech Gmbh | Air conditioning unit for offices and living rooms - consists of air flow producing unit with filtered air inlet into room through which air is forced under pressure |
| FI122284B (en) * | 2006-10-03 | 2011-11-15 | Halton Oy | Terminal for ventilation |
| DE202007003658U1 (en) * | 2007-03-09 | 2008-07-24 | Colt International Licensing Ltd., Havant | Device for influencing the indoor climate in buildings |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2738719A (en) * | 1951-08-02 | 1956-03-20 | William J Caldwell | Centrifugal nozzle with adjustable outlet vanes |
| US3999471A (en) * | 1975-02-24 | 1976-12-28 | American Air Filter Company, Inc. | Filter hood device |
-
1986
- 1986-10-10 DE DE8626929U patent/DE8626929U1/en not_active Expired
-
1987
- 1987-09-16 DE DE8787113532T patent/DE3773826D1/en not_active Expired - Fee Related
- 1987-09-16 AT AT87113532T patent/ATE68584T1/en not_active IP Right Cessation
- 1987-09-16 EP EP87113532A patent/EP0263333B1/en not_active Expired - Lifetime
- 1987-09-16 ES ES198787113532T patent/ES2026878T3/en not_active Expired - Lifetime
-
1991
- 1991-12-30 GR GR91402193T patent/GR3003464T3/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4301757C1 (en) * | 1993-01-23 | 1994-05-05 | Kesslertech Gmbh | Floor- or ceiling-outlet for ventilation air - has perforated cover plate and swirl-inducer with blade-pitch |
Also Published As
| Publication number | Publication date |
|---|---|
| DE8626929U1 (en) | 1987-11-05 |
| EP0263333A3 (en) | 1989-03-08 |
| DE3773826D1 (en) | 1991-11-21 |
| ATE68584T1 (en) | 1991-11-15 |
| GR3003464T3 (en) | 1993-02-17 |
| ES2026878T3 (en) | 1992-05-16 |
| EP0263333A2 (en) | 1988-04-13 |
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