EP0315943B1 - False floor for extracting air out of a room - Google Patents

False floor for extracting air out of a room Download PDF

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Publication number
EP0315943B1
EP0315943B1 EP88118566A EP88118566A EP0315943B1 EP 0315943 B1 EP0315943 B1 EP 0315943B1 EP 88118566 A EP88118566 A EP 88118566A EP 88118566 A EP88118566 A EP 88118566A EP 0315943 B1 EP0315943 B1 EP 0315943B1
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EP
European Patent Office
Prior art keywords
resp
sections
perforated
stiffening
stiffener
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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
Application number
EP88118566A
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German (de)
French (fr)
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EP0315943A3 (en
EP0315943A2 (en
Inventor
Klaus Dr.-Ing. Fitzner
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Heinrich Nickel GmbH
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Heinrich Nickel GmbH
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Priority to AT88118566T priority Critical patent/ATE89631T1/en
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Publication of EP0315943A3 publication Critical patent/EP0315943A3/en
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Publication of EP0315943B1 publication Critical patent/EP0315943B1/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/02—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation having means for ventilation or vapour discharge
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E04F15/024—Sectional false floors, e.g. computer floors
    • E04F15/02405—Floor panels
    • 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
    • F24F13/068—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser formed as perforated walls, ceilings or floors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • F24F7/10—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with air supply, or exhaust, through perforated wall, floor or ceiling

Definitions

  • the invention relates to a raised floor for extracting air from rooms, in particular clean rooms, which is connected to the supply air system of a ventilation and / or air conditioning system, in which the upper floor level is formed by perforated and / or slotted plates resting on supporting members, the underside of which have a stiffening system formed by stiffening webs, profiles or the like, with the areas of the stiffening system facing away from the perforated and / or slotted plate being assigned covers which project at least in the area of the stiffening web and / or profile edges beyond the lower level of the stiffening system Limit or form nozzle openings, and all nozzle openings are provided with the same opening direction.
  • a raised floor of this type is already known from US Pat. No. 3,252,400.
  • the individual perforated plates each rest with a plurality of support webs on supporting bars of a stiffening system which run transversely thereto and are supported by support members.
  • an additional intermediate floor is fixed to the support members, which contains slot-like passages at relatively large distances from each other, namely approximately in the middle between two adjacent groups of support members, but otherwise remains uninterrupted the total area of the building floor extends.
  • a flap body of corresponding width and length is assigned to each slot-like passage of the intermediate floor, which is intended to support the air flow from the area above the intermediate floor to the area below the intermediate floor. It causes a sideways deflection of the air flow to a point at which the air can then be extracted.
  • an equalization of the air flow can be achieved through different free cross-sections in the perforated and / or slotted plates, for example by varying or choosing the shape, size, position or arrangement of the perforated and / or slotted cross-sections.
  • the aim of the invention is to provide a raised floor of a generic type, with which a uniform distribution of the extracted air over the surface of the raised floor can be achieved with only slight to medium pressure loss.
  • the inventive solution to this problem is - according to the characterizing part of claim 1 - achieved in that in each case two stiffening webs, profiles or the like of the stiffening system which are provided in parallel spacing are assigned a laminated body tongue, one longitudinal edge of which has a stiffening web, profile or the like in Connection is established while its other longitudinal edge is held at a distance from the lower edge of the next - second - stiffening web, profile or the like.
  • the pressure loss in the raised floor can be significantly reduced because the underside of the perforated and / or slotted plates, which has the stiffening system, is given a smooth design.
  • the remaining pressure loss in the flow direction is compensated for by the air blown in with a higher pulse. If the velocity of the sloping partial volume flows is greater than that of the main flow, then the partial volume flows give a large part of their momentum in the main flow direction to the main flow. This effect is then expressed in negative drag coefficients for the main flow, which make up for the remaining pressure loss.
  • These measures also create a driving nozzle design in a simple manner, which operates at the lowest possible angle to the external flow direction.
  • the in turn has the consequence that the partial volume flows are introduced into the exhaust air duct at high speed, so that on the one hand a relatively large pressure drop is generated at the inlet and on the other hand part of the dynamic energy of the partial jet can be used to drive the main flow.
  • covers are formed by a plate common to all stiffening webs, profiles or the like, a perforated and / or slotted plate, each in the spacing areas between adjacent stiffening webs , profiles or the like are provided with punched or hatch-shaped nozzle slots.
  • the common plate can be provided at least near each stiffening web, profile or the like with a row of nozzle slots oriented parallel thereto.
  • the common plate is provided at least centrally between two adjacent stiffening webs, profiles or the like with a row of nozzle slots aligned parallel to these.
  • both measures can also be used simultaneously, so that on the one hand near a stiffening web, profile or the like and on the other hand, such a row of nozzle slots is also provided centrally between two adjacent stiffening webs, profiles or the like.
  • each tongue is limitedly adjustable in angle and is detectable in different angular positions between the stiffening webs, profiles or the like, it being possible to adjust the quantity by adjusting the angle of the tongues.
  • the mode of operation of the driving nozzles can be improved in all cases if, according to the invention - according to claim 8 - a flow guide surface is assigned to the region of the stiffening webs, profiles or the like adjacent to a nozzle opening.
  • the guide surface is formed directly by an arcuately contoured region of the stiffening webs, profiles or the like, or the guide surface is - according to claim 10 - on an additional profile that with the stiffening webs , profiles or the like is connected or connectable.
  • FIG. 1 of the drawing shows an isometric representation of a partial area of a clean room, as is required, for example, for the production of highly sensitive electronic components, for operating zones in clinics or for the accommodation of EDP systems.
  • a clean room is usually supplied with the required air by an air conditioning system.
  • This air conditioning air is guided as a so-called displacement or piston flow through the clean room 1, in which - as a rule - the air is guided in a vertical direction from the ceiling 2 to the floor 3.
  • the ceiling 2 of the clean room 1 is constructed as a so-called climatic ceiling, the lower level of which is equipped with so-called laminarators 4.
  • perforated ceilings or grid ceilings can also be used. It is also possible to use only suspended matter filters as outlets if less demands are made on the laminarity of the flow.
  • the floor 3 of the clean room 1 is designed as a double floor, in which a plurality of perforated and / or slotted plates 7 are held at a distance above the actual building floor 5 by supporting members 6 resting thereon, as can clearly be seen in FIG. 1 of the drawing is.
  • the support members 6 have, for example, a rod-like shape and are each equipped with a support plate at both their lower and their upper ends.
  • the support members 6 are preferably arranged and mounted on the building floor 5 such that at least the corner regions of the perforated and / or slotted plates 7 can be placed on their upper support plate. While only the corner of a perforated and / or slotted plate 7 comes to rest in the corner areas of a room on the upper support plate of a support member 6, the corners of two adjacent perforated and / or slotted plates 7. Finally, in the areas remote from the room walls, the support members 6 are arranged on the building floor 5 so that the support plate of one of them can be used as a support for the corners of four adjacent perforated and / or slotted plates 7.
  • each individual perforated and / or slotted plate 7 is equipped with a large number of openings 8 of the same size in the form of holes or slits, as can be seen particularly clearly in FIGS. 2 to 4.
  • each individual perforated and / or slotted plate 7 also has the high load-bearing capacity required for the respective application, it rests on the one hand on a support frame 9 which runs closely along all of its boundary edges, which in turn itself has a larger number of spaced-apart frames Support bars 10 is stabilized.
  • the support bars 10 are firmly connected to the support frame 9, for example welded, and the connection of the support frame 9 and the support bars 10 with the perforated and / or slotted plate 7 is e.g. made by welding.
  • the support frame 9 and the support spars 10 are each formed by rectangular tubes that are upright in their cross section.
  • the rectangular tubes of the support frame 9 and the support bars 10 have the same cross-sectional height.
  • the cross-sectional width of the rectangular tubes forming the support frame is larger than the cross-sectional width of the rectangular tubes forming the support bars 10, as can be seen particularly clearly from a comparison of FIGS. 3 and 4.
  • the support frames 9 and support bars 10 already mentioned form a stiffening system determining their load capacity for each individual perforated and / or slotted plate 7.
  • this stiffening system facing away from the actual perforated and / or slotted plate 7 are assigned special covers in the form of thin-walled laminated bodies.
  • these covers consist of laminated body zones 11, one longitudinal edge 12 of which is connected to a rectangular tube of the support frame 9 serving as a stiffening profile or a rectangular tube of a support bar 10 also serving as a stiffening profile, as is shown in FIGS 3 to 5 can be seen.
  • the laminate tongue 11 is kinked at a distance from its longitudinal edge 12 at a relatively small angle so that its other longitudinal edge is at a distance 14 from the
  • the lower edge of the next stiffening profile or rectangular tube of a support bar 10 or of the support frame 9 occupies, as shown in FIG. 5.
  • Each laminate tongue 11 preferably overlaps with its free longitudinal edge 13 the fastened longitudinal edge 12 of the next or adjacent laminate tongue 11, as can also be clearly seen in FIG. 5.
  • Each laminate tongue 11 forms a cover on the underside of the cavity 15, which is delimited below the actual perforated and / or slotted plate 7 between two rectangular tubes of the support frame 9 or the support bars 10, which are arranged parallel to one another and at a distance from one another. Only a longitudinal gap corresponding to the distance 14 is kept free between the free longitudinal edge 13 of each laminate tongue 11 and the adjacent longitudinal surface of the rectangular tube of a support bar 10 or the support frame 9. There it forms a nozzle gap 16 of relatively small width, which causes a directed air outlet from the respective cavity 15 into that area of the raised floor 3 which is kept clear above the actual building floor 5.
  • FIG. 6 where a larger number of perforated and / or slotted plates 7 are provided in a side-by-side arrangement and each of them carries on its underside a plurality of laminate tongues 11 pointing in the same direction, their arrangement and training is shown in detail in Figs. 3-5.
  • Fig. 6 of the drawing makes it clear that the partial volume flows emerging from the individual cavities 15 of each perforated and / or slotted plate 7 through the nozzle gaps 16 delimited by the laminate tongues 11 at a very flat angle to the main flow direction into the cavity of the raised floor 3 above enter the building floor 5.
  • a relatively large pressure drop is generated at the inlet, and on the other hand a part of the dynamic energy of the partial jet is used to drive the main flow.
  • the partial volume flow delivers a large part of its momentum in the main flow direction to the main flow. This is then expressed in negative drag coefficients for the main flow, with the result that a pressure loss that has occurred is compensated for.
  • cover is formed by a plate 17 common and continuous for all rectangular tubes or stiffening profiles of support frame 9 and support bars 10, each of which is punched out in the spacing areas between adjacent rectangular tubes or stiffening profiles and then in the manner of Hutzen 18 pronounced nozzle slots is provided.
  • the common plate 17 should be provided at least near the rectangular tube or stiffening profile delimiting the downstream end of the cavity 15 with a parallel row of nozzle slots 18 aligned therewith. In this case, however, it would also be possible to assign these a series of nozzle slots 19 to the cavity 15 approximately in the middle between two mutually parallel rectangular tubes or stiffening profiles.
  • each cavity 15 is assigned two rows of nozzle slots 19, one row of which is arranged in the region of the downstream rectangular tube or stiffening profile, while the second row of nozzle slots 19 is located approximately in the middle between two adjacent rectangular tubes or stiffening profiles.
  • the nozzles 18 delimiting the nozzle slots 19 in the common plate 17 preferably have a contour that is flat S-shaped in the flow direction of the air and thus ensure that the air is at a flat angle to the main flow direction passes from the cavity 15 into the area of the raised floor 3 above the building floor 5.
  • the perforated and / or slotted plates 7 can be equipped with a laminate tongue 11 in the modification of the construction shown in FIGS. 3 to 5 in the region of each cavity 15, the tongue being adjustable to a limited extent as well as in different angular positions can be arranged in each case between two mutually parallel rectangular tubes or stiffening profiles of the support frame 9 and support bars 10.
  • 11 legs 20 are bent up at right angles on both transverse edges of the laminate tongues. These legs 20 are hung in the vicinity of the longitudinal edges 12 via pivot pins 21 between two parallel spars of the support frame 9. On the other hand, they carry locking means 22 in the vicinity of the longitudinal edge 13 of the laminated tongue 11, with the aid of which the respective angular position of the laminated tongue 11 can be fixed relative to the supporting frame 9.
  • the size of the nozzle gap 16 can be varied in a simple manner and thus a quantity regulation of the air flowing from the cavity 15 through the nozzle gap 16 can be achieved.
  • a similar effect can also be achieved by using an additional profile 24 which is subsequently connected to the rectangular tube of a support bar 10 or the support frame 9, as can be seen in FIG. 12 of the drawing.
  • FIG. 13 of the drawing A similar additional profile 24 for influencing the contour of the nozzle gap 16 can also be seen in FIG. 13 of the drawing.
  • the stiffening system of the perforated and / or slotted plate 7 is not formed by rectangular tubes. Rather, it is shown there that in some cases it may also be sufficient if the support frame 9 and the support bars 10 of the stiffening system are formed by flat material webs 25 which are mounted in an upright arrangement on the underside of the perforated and / or slotted plate 7.
  • the perforated and / or slotted plates 7 as a whole can also be manufactured as a one-piece, thick-walled construction.
  • the openings 8, either in the form of round holes or also as longitudinal slots, can then be cut into the plate structure at such a relatively flat angle that the entry angle for the partial volume flows to the main flow direction in the raised floor 3, which is desirable for a low pressure loss, is achieved .

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
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Abstract

A false floor for extracting air out of a room, in particular a clean room, which is connected to the supply-air system of a ventilation and/or air conditioning unit. In the false floor, the upper floor level is formed of perforated and/or slotted panels resting on supporting members and possessing, on their underside, a stiffening system formed of stiffening webs, profiles or the like. To achieve a uniform distribution of the extracted air over the entire cross-sectional area of the room while keeping the pressure losses low, coverings are assigned to the regions of the stiffening system facing away from the perforated and/or slotted panel, said coverings delimiting or forming nozzle openings which project beyond the lower level of the stiffening system at least in the region of the stiffening web edges or stiffening profile edges. In this case, all of the nozzle openings are provided with the same opening direction.

Description

Die Erfindung betrifft einen Doppelboden zur Luftabsaugung aus Räumen, insbesondere Reinräumen, die mit dem Zuluftsystem einer Lüftungs- und/oder Klimaanlage in Verbindung steht, bei welchem die obere Bodenebene von auf Stützgliedern ruhenden Loch- und/oder Schlitzplatten gebildet ist, die an ihrer Unterseite ein von Versteifungsstegen, -profilen oder dergleichen gebildetes Versteifungssystem aufweisen, wobei den von der Loch- und/oder Schlitzplatte abgewendeten Bereichen des Versteifungssystems Abdeckungen zugeordnet sind, welche jeweils mindestens im Bereich der Versteifungssteg- und/oder -profilkanten über die untere Ebene des Versteifungssystems vorspringende Düsenöffnungen begrenzen oder ausbilden, und wobei sämtliche Düsenöffnungen mit übereinstimmender Öffnungsrichtung vorgesehen sind.The invention relates to a raised floor for extracting air from rooms, in particular clean rooms, which is connected to the supply air system of a ventilation and / or air conditioning system, in which the upper floor level is formed by perforated and / or slotted plates resting on supporting members, the underside of which have a stiffening system formed by stiffening webs, profiles or the like, with the areas of the stiffening system facing away from the perforated and / or slotted plate being assigned covers which project at least in the area of the stiffening web and / or profile edges beyond the lower level of the stiffening system Limit or form nozzle openings, and all nozzle openings are provided with the same opening direction.

Ein Doppelboden dieser Art ist bereits bekannt durch die US-A 3 252 400. Hierbei ruhen die einzelnen Lochplatten jeweils mit einer Vielzahl von Stützstegen auf quer hierzu verlaufenden Tragholmen eines Versteifungssystems, welches von Stützgliedern getragen wird. Wiederum mit Abstand unterhalb der Tragholme - und mit Abstand oberhalb des eigentlichen Gebäudebodens - ist an den Stützgliedern ein zusätzlicher Zwischenboden fixiert, welcher in relativ großen Abständen voneinander, nämlich etwa mittig zwischen zwei benachbarten Gruppen von Stützgliedern schlitzartige Durchlässe enthält, sich im übrigen aber ununterbrochen über die Gesamtfläche des Gebäudebodens hinweg erstreckt. Jedem schlitzartigen Durchlaß des Zwischenbodens ist dabei ein Klappenkörper entsprechender Breite und Länge zugeordnet, welcher die Luftführung aus dem Bereich oberhalb des Zwischenbodens in den Bereich unterhalb des Zwischenbodens unterstützen soll. Er bewirkt dabei eine seitwärts gerichtete Umlenkung des Luftstromes zu einer Stelle hin, an der dann die Luft abgesaugt werden kann.A raised floor of this type is already known from US Pat. No. 3,252,400. In this case, the individual perforated plates each rest with a plurality of support webs on supporting bars of a stiffening system which run transversely thereto and are supported by support members. Again at a distance below the support bars - and at a distance above the actual floor of the building - an additional intermediate floor is fixed to the support members, which contains slot-like passages at relatively large distances from each other, namely approximately in the middle between two adjacent groups of support members, but otherwise remains uninterrupted the total area of the building floor extends. A flap body of corresponding width and length is assigned to each slot-like passage of the intermediate floor, which is intended to support the air flow from the area above the intermediate floor to the area below the intermediate floor. It causes a sideways deflection of the air flow to a point at which the air can then be extracted.

Da einer relativ großen Bodenfläche jeweils immer nur ein schlitzartiger Durchlaß und eine zugehörige Umlenkklappe zugeordnet sind, ist im Raum oberhalb des Zwischenbodens bzw. unterhalb der Loch- und/oder Schlitzplatten nur eine ungleichmäßige Verteilung der Luftströmung erreichbar, mit der Folge, daß auch ungünstige Einwirkungen auf die senkrecht von oben in den Raum eingeführten, großen Luftvolumenströme eintreten, die den Lüftungseffekt nachhaltig beeinträchtigen. Die Vergleichmäßigung des Luftvolumenstromes erfolgt durch Drosselung,

  • 1. hervorgerufen durch das geringe Flächenverhältnis zwischen freiem Querschnitt der Öffnung und der Klappe und
  • 2. durch entsprechendes Einstellen der einzelnen Klappen. Die einzelnen Klappen werden unabhängig voneinander und unterschiedlich eingestellt, was mit großem Einstellaufwand verbunden ist.
Since only a slot-like passage and an associated deflection flap are always assigned to a relatively large floor area, only an uneven distribution of the air flow can be achieved in the space above the intermediate floor or below the perforated and / or slotted plates, with the result that even unfavorable effects occur on the large air volume flows introduced vertically into the room from above, which have a lasting effect on the ventilation effect. The air volume flow is equalized by throttling,
  • 1. caused by the small area ratio between the free cross section of the opening and the flap and
  • 2. by adjusting the individual flaps accordingly. The individual flaps are set independently of one another and differently, which is associated with great adjustment effort.

Bei senkrecht von oben in den Raum eingeführten und dann unten durch den Doppelboden wieder hieraus abgesaugten großen Luftvolumenströme kommt es besonders auf eine möglichst gleichmäßige Verteilung der Luft über den gesamten Durchströmquerschnitt des Raumes an. Eine solche gleichmäßige Verteilung läßt sich dabei erreichen, wenn der Raum innerhalb des Doppelbodens, also unterhalb der Loch- und/oder Schlitzplatten genügend hoch bemessen werden kann oder aber, wenn der freie Querschnitt im Doppelboden sehr klein ist.In the case of large air volume flows that are introduced vertically into the room from above and then sucked out of it again through the raised floor, it is particularly important that the air is distributed as evenly as possible over the entire flow cross section of the room. Such a uniform distribution can be achieved if the space inside the raised floor, ie below the perforated and / or slotted panels, can be dimensioned sufficiently high or if the free cross section in the raised floor is very small.

Innerhalb gewisser Grenzen läßt sich eine Vergleichmäßigung der Luftführung durch unterschiedliche freie Querschnitte in den Loch- und/oder Schlitzplatten erreichen, indem bspw. Form, Größe, Lage bzw. Anordnung der Loch- und/oder Schlitzquerschnitte variiert oder unterschiedlich gewählt werden.Within certain limits, an equalization of the air flow can be achieved through different free cross-sections in the perforated and / or slotted plates, for example by varying or choosing the shape, size, position or arrangement of the perforated and / or slotted cross-sections.

Die Reduzierung des freien Querschnitts ist begrenzt durch die Druckverluste am Boden. Ein solcher Druckverlust ist jedoch unerwünscht, weil er erhöhte Energiekosten erfordert. Bspw. entspricht ein Druckverlust von 200 Pa am Doppelboden bereits einer Leistung von etwa 90 W/m².The reduction in the free cross-section is limited by the pressure losses at the bottom. However, such a pressure drop is undesirable because it requires increased energy costs. E.g. a pressure loss of 200 Pa on the raised floor corresponds to an output of around 90 W / m².

Ziel der Erfindung ist es, einen Doppelboden gattungsgemäßer Art zu schaffen, mit dem bei nur geringem bis mittlerem Druckverlust eine gleichmäßige Verteilung der abgesaugten Luft über der Fläche des Doppelbodens erreicht werden kann.The aim of the invention is to provide a raised floor of a generic type, with which a uniform distribution of the extracted air over the surface of the raised floor can be achieved with only slight to medium pressure loss.

Die erfindungsgemäße Lösung dieser Aufgabe wird - nach dem Kennzeichen des Anspruchs 1 - dadurch erreicht, daß jeweils zwei zueinander im Parallelabstand vorgesehenen Versteifungsstegen, -profilen oder dergleichen des Versteifungssystems eine Schichtkörperzunge zugeordnet ist, deren eine Längskante mit dem einen Versteifungssteg, -profil oder dergleichen in Verbindung steht, während ihre andere Längskante auf Abstand vor der Unterkante des nächsten - zweiten - Versteifungssteges, -profiles oder dergleichen gehalten ist.The inventive solution to this problem is - according to the characterizing part of claim 1 - achieved in that in each case two stiffening webs, profiles or the like of the stiffening system which are provided in parallel spacing are assigned a laminated body tongue, one longitudinal edge of which has a stiffening web, profile or the like in Connection is established while its other longitudinal edge is held at a distance from the lower edge of the next - second - stiffening web, profile or the like.

Durch diese Maßnahmen läßt sich der Druckverlust im Doppelboden wesentlich reduzieren, weil die das Versteifungssystem aufweisende Unterseite der Loch- und/oder Schlitzplatten eine glatte Ausbildung erhält. Gleichzeitig wird jedoch der verbleibende Druckverlust in Strömungsrichtung durch die mit höherem Impuls eingeblasene Luft kompensiert. Wenn die Geschwindigkeit der schräg zuströmenden Teilvolumenströme größer ist als die der Hauptströmung, dann geben die Teilvolumenströme einen großen Teil ihres Impulses in Hauptströmungsrichtung an die Hauptströmung ab. Dieser Effekt äußert sich dann in negativen Widerstandsbeiwerten für den Hauptstrom, welche den verbleibenden Druckverlust wettmachen. Auch wird durch diese Maßnahmen auf einfache Art und Weise eine Treibdüsen-Ausführung geschaffen, die in einem möglichst flachen Winkel zur Außenströmungsrichtung arbeitet. Das hat wiederum zur Folge, daß die Teilvolumenströme in den Abluftkanal mit hoher Geschwindigkeit eingebracht werden, so daß einerseits ein relativ großer Druckabfall am Eintritt erzeugt wird und andererseits ein Teil der dynamischen Energie des Teilstrahles benutzt werden kann, um die Hauptströmung anzutreiben.By means of these measures, the pressure loss in the raised floor can be significantly reduced because the underside of the perforated and / or slotted plates, which has the stiffening system, is given a smooth design. At the same time, however, the remaining pressure loss in the flow direction is compensated for by the air blown in with a higher pulse. If the velocity of the sloping partial volume flows is greater than that of the main flow, then the partial volume flows give a large part of their momentum in the main flow direction to the main flow. This effect is then expressed in negative drag coefficients for the main flow, which make up for the remaining pressure loss. These measures also create a driving nozzle design in a simple manner, which operates at the lowest possible angle to the external flow direction. The in turn has the consequence that the partial volume flows are introduced into the exhaust air duct at high speed, so that on the one hand a relatively large pressure drop is generated at the inlet and on the other hand part of the dynamic energy of the partial jet can be used to drive the main flow.

Erfahrungsgemäß wird eine gleichmäßige Verteilung dann erreicht, wenn der freie Querschnitt der Durchströmfläche ungefähr dem Ausströmquerschnitt der Luft aus dem Doppelbodenbereich entspricht.Experience has shown that a uniform distribution is achieved when the free cross-section of the flow area approximately corresponds to the outflow cross-section of the air from the raised floor area.

Ein vorteilhaftes Weiterbildungsmerkmal des Doppelbodens wird erfindungsgemäß - nach Anspruch 2 - auch darin gesehen, daß die Längskanten einander benachbarter Schichtkörperzungen sich jeweils im Bereich eines Versteifungssteges, -profiles oder dergleichen schuppenartig überlappend vorgesehen sind.An advantageous further development feature of the raised floor is also seen according to the invention - according to claim 2 - in that the longitudinal edges of mutually adjacent laminate tongues are provided in the area of a stiffening web, profile or the like overlapping in a scale-like manner.

Hierdurch wird die Richtwirkung der Treibdüsen für die in den Doppelboden eintretenden Teilvolumenströme besonders günstig beeinflußt.This has a particularly favorable influence on the directional effect of the driving nozzles for the partial volume flows entering the raised floor.

Eine andere Lösung der der Erfindung zugrundeliegenden Aufgabe ist - nach Anspruch 3 - dadurch möglich, daß die Abdeckungen von einer für sämtliche Versteifungsstege, -profile oder dergleichen eine Loch- und/oder Schlitzplatte gemeinsamen Platte gebildet sind, welche jeweils in den Abstandsbereichen zwischen benachbarten Versteifungsstegen, -profilen oder dergleichen mit ausgestanzten oder hutzenartig ausgeprägten Düsenschlitzen versehen sind.Another solution of the object on which the invention is based is - according to claim 3 - possible in that the covers are formed by a plate common to all stiffening webs, profiles or the like, a perforated and / or slotted plate, each in the spacing areas between adjacent stiffening webs , profiles or the like are provided with punched or hatch-shaped nozzle slots.

Hierbei kann - nach Anspruch 4 - die gemeinsame Platte mindestens nahe jedem Versteifungssteg, -profil oder dergleichen mit einer parallel dazu ausgerichteten Reihe von Düsenschlitzen versehen werden.Here - according to claim 4 - the common plate can be provided at least near each stiffening web, profile or the like with a row of nozzle slots oriented parallel thereto.

Möglich ist es darüber hinaus aber auch, daß - nach Anspruch 5 - die gemeinsame Platte mindestens mittig zwischen zwei benachbarten Versteifungsstegen, -profilen oder dergleichen mit einer parallel zu diesen ausgerichteten Reihe von Düsenschlitzen versehen ist.It is also possible, however, that - according to claim 5 - the common plate is provided at least centrally between two adjacent stiffening webs, profiles or the like with a row of nozzle slots aligned parallel to these.

Im Rahmen der Erfindung lassen sich gegebenenfalls aber auch beide Maßnahmen gleichzeitig benutzen, so daß einerseits nahe einem Versteifungssteg, -profil oder dergleichen und andererseits auch mittig zwischen zwei benachbarten Versteifungsstegen, -profilen oder dergleichen je eine solche Reihe von Düsenschlitzen vorgesehen ist.In the context of the invention, however, if necessary, both measures can also be used simultaneously, so that on the one hand near a stiffening web, profile or the like and on the other hand, such a row of nozzle slots is also provided centrally between two adjacent stiffening webs, profiles or the like.

In allen diesen Fällen hat es sich als besonders zweckmäßig erwiesen, wenn erfindungsgemäß - nach Anspruch 6 - die die Düsenschlitze begrenzenden Hutzen in der gemeinsamen Platte eine in Strömungsrichtung der Luft flach S-förmig begrenzte Kontur haben, weil diese eine günstige Richtwirkung auf die Teilvolumenströme ausübt.In all of these cases, it has proven to be particularly expedient if, according to the invention - according to claim 6 - the nozzles delimiting the nozzle slots in the common plate have a contour which is flat S-shaped in the flow direction of the air, because this exerts a favorable directivity on the partial volume flows .

In manchen Fällen bewährt es sich auch, wenn nach der Erfindung - gemäß Anspruch 7 - jede Zunge begrenzt winkelverstellbar sowie in verschiedenen Winkellagen feststellbar zwischen den Versteifungsstegen, -profilen oder dergleichen aufgehängt ist, wobei durch die Winkelverstellung der Zungen eine Mengenregulierung vorgenommen werden kann.In some cases it also proves useful if, according to the invention - according to claim 7 - each tongue is limitedly adjustable in angle and is detectable in different angular positions between the stiffening webs, profiles or the like, it being possible to adjust the quantity by adjusting the angle of the tongues.

Die Wirkungsweise der Treibdüsen läßt sich in allen Fällen verbessern, wenn erfindungsgemäß - nach Anspruch 8 - jeweils dem einer Düsenöffnung benachbarten Bereich der Versteifungsstege, -profile oder dergleichen eine Strömungsleitfläche zugeordnet ist.The mode of operation of the driving nozzles can be improved in all cases if, according to the invention - according to claim 8 - a flow guide surface is assigned to the region of the stiffening webs, profiles or the like adjacent to a nozzle opening.

Es besteht dabei entweder die Möglichkeit - nach Anspruch 9 - daß die Leitfläche unmittelbar von einem bogenförmig gekrümmt konturierten Bereich der Versteifungsstege, -profile oder dergleichen gebildet ist, oder aber die Leitfläche befindet sich - nach Anspruch 10 - an einem Zusatzprofil, das mit den Versteifungsstegen, -profilen oder dergleichen verbunden oder verbindbar ist.There is either the possibility - according to claim 9 - that the guide surface is formed directly by an arcuately contoured region of the stiffening webs, profiles or the like, or the guide surface is - according to claim 10 - on an additional profile that with the stiffening webs , profiles or the like is connected or connectable.

Weitere Merkmale und Vorteile des Gegenstandes der Erfindung werden nachfolgend anhand der Zeichnung und darin dargestellte Ausführungsbeispiele erläutert. Es zeigen

Figur 1
in isometrischer Teilansicht einen zu belüftenden und/oder zu klimatisierenden Reinraum mit einem Doppelboden zur Luftabsaugung,
Figur 2
in größerem Maßstab und in Draufsicht eine Loch- und/oder Schlitzplatte aus dem Doppelboden nach Fig. 1,
Figur 3
in größerem Maßstab einen Schnitt entlang der Linie III-III in Fig. 2,
Figur 4
in größerem Maßstab einen Schnitt entlang der Linie IV-IV in Fig. 2,
Figur 5
eine der Fig. 4 entsprechende Darstellung, jedoch mit zwei im Abstand zueinander benachbarten Versteifungsprofilen,
Figur 6
in schematisch vereinfachter Schnittdarstellung einen Teilabschnitt eines unter Verwendung von Loch- und/oder Schlitzplatten nach den Fig. 2 bis 5 erstellten Doppelbodens,
Figur 7
in einer der Fig. 5 entsprechenden Darstellung eine abgewandelte Bauart einer Loch- und/oder Schlitzplatte für den Bau von Doppelböden,
Figur 8
einen Schnitt entlang der Linie VIII-VIII in Fig. 7,
Figur 9
in schematisch vereinfachter Schnittdarstellung eine weitere Ausführungsmöglichkeit für eine Loch- und/oder Schlitzplatte,
Figur 10
die Loch - und/oder Schlitzplatte nach Fig. 9 in Pfeilrichtung X gesehen, während die
Figuren 11 bis 14
jeweils in schematisch vereinfachter Darstellung verschiedene weitere Ausbildungsvarianten für die Loch- und/oder Schlitzplatten für den Bau eines Doppelbodens zur Luftabsaugung aus Räumen wiedergeben.
Further features and advantages of the subject matter of the invention are explained below with reference to the drawing and the exemplary embodiments shown therein. Show it
Figure 1
isometric partial view of a clean room to be ventilated and / or air-conditioned with a raised floor for air extraction,
Figure 2
on a larger scale and in plan view a perforated and / or slotted plate from the double floor according to FIG. 1,
Figure 3
on a larger scale a section along the line III-III in Fig. 2,
Figure 4
on a larger scale a section along the line IV-IV in Fig. 2,
Figure 5
4 shows a representation corresponding to FIG. 4, but with two stiffening profiles spaced apart from one another,
Figure 6
a schematically simplified sectional view of a partial section of a raised floor using perforated and / or slotted plates according to FIGS. 2 to 5,
Figure 7
5 shows a modified design of a perforated and / or slotted plate for the construction of raised floors,
Figure 8
7 shows a section along the line VIII-VIII in FIG. 7,
Figure 9
in a schematically simplified sectional view, a further possible embodiment for a perforated and / or slotted plate,
Figure 10
the perforated and / or slotted plate according to FIG. 9 seen in the direction of arrow X, while the
Figures 11 to 14
reproduce various further training variants for the perforated and / or slotted plates for the construction of a raised floor for air extraction from rooms, each in a schematically simplified representation.

Die Fig. 1 der Zeichnung zeigt in isometrischer Darstellung einen Teilbereich eines Reinraumes, wie er bspw. für die Herstellung hochempfindlicher elektronischer Bausteine, für Operationszonen in Kliniken oder auch für die Unterbringung von EDV-Anlagen benötigt wird. Ein solcher Reinraum wird in der Regel von einer Klimaanlage mit der benötigten Luft versorgt. Diese Klimatisierungsluft wird dabei als sogenannte Verdränger- bzw. Kolbenströmung durch den Reinraum 1 geführt, bei welcher - in der Regel - die Luftführung in Vertikalrichtung von der Decke 2 her zum Boden 3 hin erfolgt.1 of the drawing shows an isometric representation of a partial area of a clean room, as is required, for example, for the production of highly sensitive electronic components, for operating zones in clinics or for the accommodation of EDP systems. Such a clean room is usually supplied with the required air by an air conditioning system. This air conditioning air is guided as a so-called displacement or piston flow through the clean room 1, in which - as a rule - the air is guided in a vertical direction from the ceiling 2 to the floor 3.

Damit im Reinraum 1 eine laminare Vertikalströmung aufgebaut wird, ist die Decke 2 des Reinraumes 1 als sogenannte Klimadecke aufgebaut, deren untere Ebene mit sogenannten Laminarisatoren 4 ausgestattet ist.So that a laminar vertical flow is established in the clean room 1, the ceiling 2 of the clean room 1 is constructed as a so-called climatic ceiling, the lower level of which is equipped with so-called laminarators 4.

Anstelle der Laminarisatoren 4 können aber auch Lochdecken oder Rasterdecken treten. Auch ist es möglich, als Auslässe lediglich Schwebstoff-Filter zu verwenden, wenn an die Laminarität der Strömung geringere Anforderungen gestellt werden.Instead of the laminarizers 4, perforated ceilings or grid ceilings can also be used. It is also possible to use only suspended matter filters as outlets if less demands are made on the laminarity of the flow.

Der Boden 3 des Reinraumes 1 ist als Doppelboden ausgeführt, bei welchem mit Abstand über dem eigentlichen Gebäudeboden 5 durch auf diesem ruhende Stützglieder 6 eine Vielzahl von Loch- und/oder Schlitzplatten 7 gehalten sind, wie das deutlich aus der Fig. 1 der Zeichnung ersichtlich ist.The floor 3 of the clean room 1 is designed as a double floor, in which a plurality of perforated and / or slotted plates 7 are held at a distance above the actual building floor 5 by supporting members 6 resting thereon, as can clearly be seen in FIG. 1 of the drawing is.

Die Stützglieder 6 haben bspw. eine stabförmige Gestalt und sind sowohl an ihrem unteren als auch an ihrem oberen Ende jeweils mit einer Stützplatte ausgestattet.The support members 6 have, for example, a rod-like shape and are each equipped with a support plate at both their lower and their upper ends.

Die Stützglieder 6 werden auf dem Gebäudeboden 5 vorzugsweise so angeordnet und montiert, daß auf ihrer oberen Stützplatte zumindest die Eckbereiche der Loch-und/oder Schlitzplatten 7 zur Auflage gebracht werden können. Während dabei in den Eckbereichen eines Raumes auf der oberen Stützplatte eines Stützgliedes 6 jeweils nur die Ecke einer Loch- und/oder Schlitzplatte 7 zur Auflage gelangt, ruhen auf der oberen Stützplatte jedes entlang einer Wand aufgestellten Stützgliedes 6 gleichzeitig die Ecken zweier benachbarter Loch- und/oder Schlitzplatten 7. In den von den Raumwänden entfernten Bereichen sind schließlich die Stützglieder 6 auf dem Gebäudeboden 5 so angeordnet, daß jeweils die Stützplatte eines derselben als Auflage für die Ecken von vier benachbarten Loch- und/oder Schlitzplatten 7 benutzt werden kann.The support members 6 are preferably arranged and mounted on the building floor 5 such that at least the corner regions of the perforated and / or slotted plates 7 can be placed on their upper support plate. While only the corner of a perforated and / or slotted plate 7 comes to rest in the corner areas of a room on the upper support plate of a support member 6, the corners of two adjacent perforated and / or slotted plates 7. Finally, in the areas remote from the room walls, the support members 6 are arranged on the building floor 5 so that the support plate of one of them can be used as a support for the corners of four adjacent perforated and / or slotted plates 7.

Da die auf den Stützgliedern 6 verlegten Loch- und/oder Schlitzplatten 7 die obere Begrenzung des Doppelbodens 3 bilden, ist es für eine gleichmäßige Verteilung der Luft über den gesamten - vertikal - durchströmten Raumquerschnitt wichtig, daß diese Loch- und/oder Schlitzplatten 7 einen entsprechend gleichmäßigen Luftdurchlaß in den Doppelboden 3 hinein gewährleisten. Jede einzelne Loch- und/oder Schlitzplatte 7 dabei über ihre Fläche hinweg mit einer Vielzahl von bspw. gleichgroßen Durchbrüchen 8 in Form von Löchern oder Schlitzen ausgestattet, wie das besonders deutlich die Fig. 2 bis 4 erkennen lassen.Since the perforated and / or slotted plates 7 laid on the support members 6 form the upper boundary of the raised floor 3, it is important for a uniform distribution of the air over the entire - vertically - flowed through space cross-section that these perforated and / or slotted plates 7 are one ensure correspondingly uniform air passage into the double floor 3. Each individual perforated and / or slotted plate 7 is equipped with a large number of openings 8 of the same size in the form of holes or slits, as can be seen particularly clearly in FIGS. 2 to 4.

Damit jede einzelne Loch- und/oder Schlitzplatte 7 aber auch die für den jeweiligen Einsatzzweck nötige, hohe Tragfähigkeit hat, ruht sie einerseits auf einem dicht entlang aller ihrer Begrenzungskanten verlaufenden Tragrahmen 9, welcher selbst wiederum durch eine größere Anzahl von im Abstand zueinander parallel verlaufende Tragholme 10 stabilisiert ist. Die Tragholme 10 sind dabei mit dem Tragrahmen 9 fest verbunden, bspw. verschweißt, und auch die Verbindung des Tragrahmens 9 sowie der Tragholme 10 mit der Loch- und/oder Schlitzplatte 7 ist z.B. durch Verschweißung hergestellt.So that each individual perforated and / or slotted plate 7 also has the high load-bearing capacity required for the respective application, it rests on the one hand on a support frame 9 which runs closely along all of its boundary edges, which in turn itself has a larger number of spaced-apart frames Support bars 10 is stabilized. The support bars 10 are firmly connected to the support frame 9, for example welded, and the connection of the support frame 9 and the support bars 10 with the perforated and / or slotted plate 7 is e.g. made by welding.

Bei dem in den Fig. 2 bis 4 gezeigten Ausführungsbeispiel einer Loch- und/oder Schlitzplatte 7 werden Tragrahmen 9 und Tragholme 10 jeweils von in ihrem Querschnitt hochkant stehenden Rechteckrohren gebildet. Dabei haben die Rechteckrohre des Tragrahmens 9 und der Tragholme 10 übereinstimmende Querschnittshöhe. Die Querschnittsbreite der den Tragrahmen bildenden Rechteckrohre ist jedoch größer bemessen als die Querschnittsbreite der die Tragholme 10 bildenden Rechteckrohre, wie das besonders deutlich ein Vergleich der Fig. 3 und 4 erkennen läßt.In the exemplary embodiment of a perforated and / or slotted plate 7 shown in FIGS. 2 to 4, the support frame 9 and the support spars 10 are each formed by rectangular tubes that are upright in their cross section. The rectangular tubes of the support frame 9 and the support bars 10 have the same cross-sectional height. However, the cross-sectional width of the rectangular tubes forming the support frame is larger than the cross-sectional width of the rectangular tubes forming the support bars 10, as can be seen particularly clearly from a comparison of FIGS. 3 and 4.

Aus Fig. 1 der Zeichnung ist ersichtlich, daß der in Vertikalrichtung durch die Loch- und/oder Schlitzplatten 7 in den Doppelboden 3 eintretenden Luftvolumenströme unterhalb dieser Loch- und/oder Schlitzplatten 7, also innerhalb des Doppelbodens 3, umgelenkt werden, damit sie dort durch einen an mindestens einer Raumwand gelegenen, relativ großflächig ausgeführten Luftauslaß 26 abgesaugt werden können.From Fig. 1 of the drawing it can be seen that the air volume flows entering through the perforated and / or slotted plates 7 in the double floor 3 in the vertical direction below these perforated and / or slotted plates 7, ie within the raised floor 3, are deflected so that they there can be suctioned off through an air outlet 26 located on at least one room wall and of relatively large area.

Damit bei einem mittleren Druckverlust eine gleichmäßige Verteilung der abgesaugten Luft über die Gesamtfläche der Loch- und/oder Schlitzplatten 7 des Doppelbodens 3 erreicht werden kann, sind an den einzelnen Loch- und/oder Schlitzplatten 7 besondere Vorkehrungen getroffen, die in einer ersten Ausführungsform in den Fig. 3 bis 5 der Zeichnung zu sehen sind.So that a uniform distribution of the extracted air over the total area of the perforated and / or slotted plates 7 of the double floor 3 can be achieved with a medium pressure loss, special precautions are taken on the individual perforated and / or slotted plates 7, which in a first embodiment in 3 to 5 of the drawing can be seen.

Die bereits vorstehend erwähnten Tragrahmen 9 und Tragholme 10 bilden für jede einzelne Loch- und/oder Schlitzplatte 7 ein ihre Tragkraft bestimmendes Versteifungssystem.The support frames 9 and support bars 10 already mentioned form a stiffening system determining their load capacity for each individual perforated and / or slotted plate 7.

Den von der eigentlichen Loch- und/oder Schlitzplatte 7 abgewendeten Bereichen dieses Versteifungssystems sind besondere Abdeckungen in Form von dünnwandigen Schichtkörpern zugeordnet. Beim Ausführungsbeispiel nach den Fig. 3 bis 5 bestehen diese Abdeckungen dabei aus Schichtkörperzonen 11, deren eine Längskante 12 jeweils mit einem als Versteifungsprofil dienenden Rechteckrohr des Tragrahmens 9 oder einem ebenfalls als Versteifungsprofil dienenden Rechteckrohr eines Tragholmes 10 in Verbindung steht, wie das aus den Fig. 3 bis 5 ersichtlich ist.The areas of this stiffening system facing away from the actual perforated and / or slotted plate 7 are assigned special covers in the form of thin-walled laminated bodies. In the exemplary embodiment according to FIGS. 3 to 5, these covers consist of laminated body zones 11, one longitudinal edge 12 of which is connected to a rectangular tube of the support frame 9 serving as a stiffening profile or a rectangular tube of a support bar 10 also serving as a stiffening profile, as is shown in FIGS 3 to 5 can be seen.

Die Schichtkörperzunge 11 ist dabei im Abstand von ihrer Längskante 12 unter einem relativ kleinen Winkel so abgeknickt, daß ihre andere Längskante einen Abstand 14 von der Unterkante des nächstfolgenden Versteifungsprofils bzw. Rechteckrohres eines Tragholmes 10 bzw. des Tragrahmens 9 einnimmt, wie das die Fig. 5 deutlich macht.The laminate tongue 11 is kinked at a distance from its longitudinal edge 12 at a relatively small angle so that its other longitudinal edge is at a distance 14 from the The lower edge of the next stiffening profile or rectangular tube of a support bar 10 or of the support frame 9 occupies, as shown in FIG. 5.

Jede Schichtkörperzunge 11 überlappt vorzugsweise mit ihrer freien Längskante 13 jeweils die befestigte Längskante 12 der nächstfolgenden bzw. benachbarten Schichtkörperzunge 11, wie das ebenfalls der Fig. 5 deutlich entnommen werden kann.Each laminate tongue 11 preferably overlaps with its free longitudinal edge 13 the fastened longitudinal edge 12 of the next or adjacent laminate tongue 11, as can also be clearly seen in FIG. 5.

Jede Schichtkörperzunge 11 bildet eine unterseitige Abdeckung desjenigen Hohlraumes 15, welcher unterhalb der eigentlichen Loch- und/oder Schlitzplatte 7 zwischen zwei im Abstand zueinander parallel angeordneten Rechteckrohren des Tragrahmens 9 bzw. der Tragholme 10 begrenzt wird. Lediglich ein dem Abstand 14 entsprechender Längsspalt wird zwischen der freien Längskante 13 jeder Schichtkörperzunge 11 und der ihr benachbarten Längsfläche des Rechteckrohres eines Tragholmes 10 bzw. des Tragrahmens 9 freigehalten. Er bildet dort einen Düsenspalt 16 von relativ geringer Breite, welcher einen gerichteten Luftaustritt aus dem jeweiligen Hohlraum 15 in denjenigen Bereich des Doppelbodens 3 bewirkt, welcher oberhalb des eigentlichen Gebäudebodens 5 freigehalten ist.Each laminate tongue 11 forms a cover on the underside of the cavity 15, which is delimited below the actual perforated and / or slotted plate 7 between two rectangular tubes of the support frame 9 or the support bars 10, which are arranged parallel to one another and at a distance from one another. Only a longitudinal gap corresponding to the distance 14 is kept free between the free longitudinal edge 13 of each laminate tongue 11 and the adjacent longitudinal surface of the rectangular tube of a support bar 10 or the support frame 9. There it forms a nozzle gap 16 of relatively small width, which causes a directed air outlet from the respective cavity 15 into that area of the raised floor 3 which is kept clear above the actual building floor 5.

Die Wirkungsweise dieser Düsenspalte als Treibdüsen ist besonders deutlich aus Fig. 6 zu sehen, wo eine größere Anzahl von Loch- und/oder Schlitzplatten 7 in Nebeneinanderanordnung vorgesehen ist und dabei jede derselben an ihrer Unterseite mehrere in gleicher Richtung weisende Schichtkörperzungen 11 trägt, deren Anordnung und Ausbildung ausführlich in den Fig. 3 bis 5 gezeigt wird.The mode of operation of these nozzle gaps as driving nozzles can be seen particularly clearly from FIG. 6, where a larger number of perforated and / or slotted plates 7 are provided in a side-by-side arrangement and each of them carries on its underside a plurality of laminate tongues 11 pointing in the same direction, their arrangement and training is shown in detail in Figs. 3-5.

Die Fig. 6 der Zeichnung macht dabei deutlich, daß die aus den einzelnen Hohlräumen 15 jeder Loch- und/oder Schlitzplatte 7 durch die von den Schichtkörperzungen 11 begrenzten Düsenspalte 16 austretenden Teilvolumenströme unter einem sehr flachen Winkel zur Hauptströmungsrichtung in den Hohlraum des Doppelbodens 3 oberhalb des Gebäudebodens 5 ein treten. Hierdurch wird dann einerseits ein relativ großer Druckabfall am eintritt erzeugt, und andererseits wird ein Teil der dynamischen Energie des Teilstrahles Genutzt, um die Hauptströmung anzutreiben.Fig. 6 of the drawing makes it clear that the partial volume flows emerging from the individual cavities 15 of each perforated and / or slotted plate 7 through the nozzle gaps 16 delimited by the laminate tongues 11 at a very flat angle to the main flow direction into the cavity of the raised floor 3 above enter the building floor 5. In this way, on the one hand a relatively large pressure drop is generated at the inlet, and on the other hand a part of the dynamic energy of the partial jet is used to drive the main flow.

Wenn nämlich die Geschwindigkeit des schräg zuströmenden Teilvolumenstromes größer ist als die der Hauptströmung, dann gibt der Teilvolumenstrom einen großen Teil seines Impulses in Hauptströmungsrichtung an die Hauptströmung ab. Das äußert sich dann in negativen Widerstandsbeiwerten für die Hauptströmung, mit der Folge, daß ein eingetretener Druckverlust kompensiert wird.If, in fact, the speed of the sloping partial volume flow is greater than that of the main flow, then the partial volume flow delivers a large part of its momentum in the main flow direction to the main flow. This is then expressed in negative drag coefficients for the main flow, with the result that a pressure loss that has occurred is compensated for.

In den Fig. 7 und 8 ist zu sehen, daß die Abdeckung der Hohlräume 15 zwischen benachbarten Rechteckrohren des Tragrahmens 9 bzw. der Tragholme 10 nicht unbedingt durch einzelne Schichtkörperzungen 11 erfolgen muß.7 and 8 that the cavities 15 between adjacent rectangular tubes of the support frame 9 or the support bars 10 need not necessarily be covered by individual laminated body tongues 11.

Nach den Fig. 7 und 8 wird nämlich die Abdeckung von einer für sämtliche Rechteckrohre bzw. Versteifungsprofile von Tragrahmen 9 und Tragholmen 10 gemeinsamen und durchgehenden Platte 17 gebildet, welche jeweils in den Abstandsbereichen zwischen benachbarten Rechteckrohren bzw. Versteifungsprofilen mit ausgestanzten sowie dann nach Art von Hutzen 18 ausgeprägten Düsenschlitzen versehen ist.7 and 8, namely the cover is formed by a plate 17 common and continuous for all rectangular tubes or stiffening profiles of support frame 9 and support bars 10, each of which is punched out in the spacing areas between adjacent rectangular tubes or stiffening profiles and then in the manner of Hutzen 18 pronounced nozzle slots is provided.

Dabei sollte die gemeinsame Platte 17 mindestens nahe dem das stromabwärtige Ende des Hohlraums 15 begrenzenden Rechteckrohr bzw. Versteifungsprofil mit einer paralle dazu ausgerichteten Reihe von Düsenschlitzen 18 versehen sein. Möglich wäre es in diesem Falle aber auch, diese eine Reihe von Düsenschlitzen 19 dem Hohlraum 15 etwa mittig zwischen zwei zueinander parallelen Rechteckrohren bzw. Versteifungsprofilen zuzuordnen.The common plate 17 should be provided at least near the rectangular tube or stiffening profile delimiting the downstream end of the cavity 15 with a parallel row of nozzle slots 18 aligned therewith. In this case, however, it would also be possible to assign these a series of nozzle slots 19 to the cavity 15 approximately in the middle between two mutually parallel rectangular tubes or stiffening profiles.

Als besonders vorteilhaft hat sich jedoch die in Fig. 7 gezeigte Anordnung von Düsenschlitzen erwiesen. Dort sind nämlich jedem Hohlraum 15 zwei Reihen von Düsenschlitzen 19 zugeordnet, wobei die eine Reihe derselben im Bereich des stromabwärts gelegenen Rechteckrohres bzw. Versteifungsprofils angeordnet ist, während sich die zweite Reihe von Düsenschlitzen 19 dort etwa mittig zwischen zwei benachbarten Rechteckrohren bzw. Versteifungsprofilen befindet.However, the arrangement of nozzle slots shown in FIG. 7 has proven to be particularly advantageous. There, each cavity 15 is assigned two rows of nozzle slots 19, one row of which is arranged in the region of the downstream rectangular tube or stiffening profile, while the second row of nozzle slots 19 is located approximately in the middle between two adjacent rectangular tubes or stiffening profiles.

DEr Fig. 7 ist auch noch zu entnehmen, daß die die Düsenschlitze 19 begrenzenden Hutzen 18 in der gemeinsamen Platte 17 vorzugsweise eine in Strömungsrichtung der Luft flach S-förmig begrenzte Kontur haben und damit sicherstellen, daß die Luft unter einem möglichst flachen Winkel zur Hauptströmungsrichtung aus dem Hohlraum 15 in den Bereich des Doppelbodens 3 oberhalb des Gebäudebodens 5 gelangt.7 it can also be seen that the nozzles 18 delimiting the nozzle slots 19 in the common plate 17 preferably have a contour that is flat S-shaped in the flow direction of the air and thus ensure that the air is at a flat angle to the main flow direction passes from the cavity 15 into the area of the raised floor 3 above the building floor 5.

In den Fig. 9 und 10 ist noch zu sehen, daß die Loch- und/oder Schlitzplatten 7 in Abwandlung der aus den Fig. 3 bis 5 ersichtlichen Bauart im Bereich jedes Hohlraums 15 auch mit einer Schichtkörperzunge 11 ausgestattet werden kann, die begrenzt winkelverstellbar sowie in verschiedenen Winkellagen feststellbat jeweils zwischen zwei im Abstand zueinander parallelen Rechteckrohren bzw. Versteifungsprofilen von Tragrahmen 9 und Tragholmen 10 angeordnet werden kann.9 and 10 it can also be seen that the perforated and / or slotted plates 7 can be equipped with a laminate tongue 11 in the modification of the construction shown in FIGS. 3 to 5 in the region of each cavity 15, the tongue being adjustable to a limited extent as well as in different angular positions can be arranged in each case between two mutually parallel rectangular tubes or stiffening profiles of the support frame 9 and support bars 10.

Um das zu ermöglichen, sind an beiden Querkanten der Schichtkörperzungen 11 Schenkel 20 rechtwinklig hochgebogen. Diese Schenkel 20 werden dabei in der Nähe der Längskanten 12 über Lagerzapfen 21 zwischen zwei parallelen Holmen des Tragrahmens 9 verschwenkbar aufgehängt. Andererseits tragen sie in der Nähe der Längskante 13 der Schichtkörperzunge 11 Arretierungsmittel 22, mit deren Hilfe die jeweilige Winkellage der Schichtkörperzunge 11 relativ zum Tragrahmen 9 fixiert werden kann.To make this possible, 11 legs 20 are bent up at right angles on both transverse edges of the laminate tongues. These legs 20 are hung in the vicinity of the longitudinal edges 12 via pivot pins 21 between two parallel spars of the support frame 9. On the other hand, they carry locking means 22 in the vicinity of the longitudinal edge 13 of the laminated tongue 11, with the aid of which the respective angular position of the laminated tongue 11 can be fixed relative to the supporting frame 9.

Durch Änderung und anschließende Fixierung der Winkellage der Schichtkörperzungen 11 beim Ausführungsbeispiel nach den Fig. 9 und 10 kann auf einfache Art und Weise die Größe des Düsenspaltes 16 variiert und damit eine Mengenregulierung der aus dem Hohlraum 15 durch den Düsenspalt 16 strömenden Luft erzielt werden.By changing and then fixing the angular position of the laminated tongues 11 in the embodiment according to FIGS. 9 and 10, the size of the nozzle gap 16 can be varied in a simple manner and thus a quantity regulation of the air flowing from the cavity 15 through the nozzle gap 16 can be achieved.

Es ist auf einfache Art und Weise auch noch die Möglichkeit gegeben, im Bedarfsfalle die Kontur des Düsenspaltes 16 zwischen der Längskante 13 der Schichtkörperzunge 11 und dem benachbarten Rechteckrohr eines Tragholmes 10 bzw. des Tragholmes 9 zu beeinflussen. So ist es bspw. möglich, die einströmseitige Ecke des Rechteckrohres mit einer Abrundung 23 zu versehen, wie das in Fig. 11 angedeutet ist. Hierdurch wird dann eine Strömungsleitfläche gebildet, welche den Luftdurchtritt durch den Düsenspalt 16 begünstigt.In a simple manner, there is also the possibility of influencing the contour of the nozzle gap 16 between the longitudinal edge 13 of the laminated body tongue 11 and the adjacent rectangular tube of a support beam 10 or of the support beam 9, if necessary. For example, it is possible to provide the corner of the rectangular tube on the inflow side with a rounding 23, as is indicated in FIG. 11. This then forms a flow guide surface which favors the passage of air through the nozzle gap 16.

Eine ähnliche Wirkung läßt sich aber auch durch Benutzung eines Zusatzprofiles 24 erzielen, welches mit dem Rechteckrohr eines Tragholmes 10 oder des Tragrahmens 9 nachträglich verbunden wird, wie das in Fig. 12 der Zeichnung zu sehen ist.A similar effect can also be achieved by using an additional profile 24 which is subsequently connected to the rectangular tube of a support bar 10 or the support frame 9, as can be seen in FIG. 12 of the drawing.

Ein ähnliches Zusatzprofil 24 zur Beeinflussung der Kontur des Düsenspaltes 16 ist auch in Fig. 13 der Zeichnung zu sehen. Dort wird jedoch das Versteifungssystem der Loch- und/oder Schlitzplatte 7 nicht von Rechteckrohren gebildet. Vielmehr ist dort gezeigt, daß es in manchen Fällen auch ausreichen kann, wenn der Tragrahmen 9 und die Tragholme 10 des Versteifungssystems durch Flachmaterialstege 25 gebildet werden, die in hochkant stehender Anordnung an der Unterseite der Loch- und/oder Schlitzplatte 7 befestigt sind.A similar additional profile 24 for influencing the contour of the nozzle gap 16 can also be seen in FIG. 13 of the drawing. There, however, the stiffening system of the perforated and / or slotted plate 7 is not formed by rectangular tubes. Rather, it is shown there that in some cases it may also be sufficient if the support frame 9 and the support bars 10 of the stiffening system are formed by flat material webs 25 which are mounted in an upright arrangement on the underside of the perforated and / or slotted plate 7.

Schließlich wird in Fig. 14 der Zeichnung noch gezeigt, daß die Loch- und/oder Schlitzplatten 7 insgesamt auch als eine einstückig-dickwandige Konstruktion gefertigt werden können. Dabei lassen sich dann die Durchbrüche 8, entweder in Form von Rundlöchern oder aber auch als Längsschlitze, unter einem solchen, relativ flachen Winkel in die Plattenstruktur einschneiden, daß der für einen geringen Druckverlust wünschenswert flache Eintrittswinkel für die Teilvolumenströme zur Hauptströmungsrichtung im Doppelboden 3 erreicht wird.Finally, it is shown in Fig. 14 of the drawing that the perforated and / or slotted plates 7 as a whole can also be manufactured as a one-piece, thick-walled construction. The openings 8, either in the form of round holes or also as longitudinal slots, can then be cut into the plate structure at such a relatively flat angle that the entry angle for the partial volume flows to the main flow direction in the raised floor 3, which is desirable for a low pressure loss, is achieved .

Claims (10)

  1. A double floor (3) in which for the suction of air from rooms,
       especially clean rooms (1) connected to the air supply system of a ventilating plant, the upper plane of the floor is formed of perforated and/or slotted panels (7) which rest upon supporting members (6) and exhibit on their underside a stiffening system formed of stiffener webs or sections (9, 10) or the like, where covers (11 resp. 17) are associated with the regions of the stiffening system facing away from the perforated and/or slotted panels (7) and in each case at least in the region of the edges of the stiffener webs or sections form nozzle openings (16 resp. 19) projecting from the lower plane of the stiffening system (9, 10), and all of the nozzle openings (16 resp. 19) are designed to have a matching direction of opening,
    characterized in that
    with every two parallel stiffener webs, sections or the like provided for at intervals in the stiffenening system (9, 10) a body (11) in the form of a tongue of sheet material is associated, one long edge (12) of which is connected to the one stiffener web, section or the like (9 resp. 10) whilst the other long edge (13) is held at a distance (14) in front of the bottom edge of the next - second - stiffener web, section or the like (10 resp. 9).
  2. A double floor as in Claim 1,
       characterized in that the long edges (12 and 13) of adjacent bodies (11) in the form of tongues of sheet material are designed to overlap each time like scales in the region of one stiffener web, section or the like (10).
  3. A double floor (3) in which for the suction of air from rooms,
       especially clean rooms (1) which are connected to the air supply system of a ventilating and/or air-conditioning plant, the upper plane of the floor is formed of perforated and/or slotted panels (7) which rest upon supporting members (6) and exhibit on their underside a stiffening system (9, 10) formed of stiffener webs or sections or the like, where covers (11 resp. 17) are associated with the regions of the stiffening system (9, 10) facing away from the perforated and/or slotted panels (7) and in each case at least in the region of the edges of the stiffener webs or sections form nozzle openings (16 resp. 19) projecting from the lower plane of the stiffening system (9, 10), and all of the nozzle openings (16 resp. 19) are foreseen to have a matching direction of opening,
    characterized in that
    the covers are formed of one panel (17) which is common to all of the stiffener webs or sections or the like (9, 10) of one perforated and/or slotted panel (7) and is in each case provided in the regions of the spaces between adjacent stiffener webs or sections or the like (9, 10) with stamped out nozzle slits (19) standing out like scoops (18).
  4. A double floor as in Claim 4,
       characterized in that
    the common panel (17) is provided at least near each stiffener web or section or the like (10 resp. 9) with a row of nozzle slits (19) aligned in parallel therewith (Figures 7 and 8).
  5. A double floor as in one of the Claims 4 and 5,
       characterized in that
    the common panel (17) is provided at least in the middle between two adjacent stiffener webs or sections or the like (10) with a row of nozzle slits (19) aligned in parallel with the latter (Figure 7).
  6. A double floor as in one of the Claims 4 to 6,
       characterized in that
    the scoops (18) bounding the nozzle slits (19) in the common panel (17) have in the direction of flow of the air a flat contour bounded in the shape of a S (Figure 7).
  7. A double floor as in Claim 1,
       characterized in that
    each body (11) in the form of a tongue of sheet material is suspended between the stiffener webs or sections or the like (9, 10) so as to enable limited adjustment of the angle of it and fixing (22) of it in different angular positions (Figures 9 and 10).
  8. A double floor as in one of the Claims 1 to 8,
       characterized in that
    a flow guideface (23 resp. 24) is associated with each region of the stiffener webs or sections or the like (9, 10) adjacent to a nozzle opening (16 resp. 19).
  9. A double floor as in Claim 9,
       characterized in that
    the guideface (23) is formed directly by a contoured region of the stiffener webs or sections or the like (9, 10) which is curved in the shape of an arc (Figure 11).
  10. A double floor as in Claim 9,
       characterized in that
    the guideface is found on an added profile (24) connected to the stiffener webs or sections or the like (9, 10 resp. 25) (Figures 12 and 13).
EP88118566A 1987-11-12 1988-11-08 False floor for extracting air out of a room Expired - Lifetime EP0315943B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88118566T ATE89631T1 (en) 1987-11-12 1988-11-08 RAISED FLOOR FOR AIR EXTRACTION FROM ROOMS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873738444 DE3738444A1 (en) 1987-11-12 1987-11-12 DOUBLE FLOOR FOR AIR EXTRACTION FROM ROOMS
DE3738444 1987-11-12

Publications (3)

Publication Number Publication Date
EP0315943A2 EP0315943A2 (en) 1989-05-17
EP0315943A3 EP0315943A3 (en) 1991-03-27
EP0315943B1 true EP0315943B1 (en) 1993-05-19

Family

ID=6340360

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88118566A Expired - Lifetime EP0315943B1 (en) 1987-11-12 1988-11-08 False floor for extracting air out of a room

Country Status (4)

Country Link
US (1) US5144781A (en)
EP (1) EP0315943B1 (en)
AT (1) ATE89631T1 (en)
DE (2) DE3738444A1 (en)

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JP5427833B2 (en) * 2011-05-18 2014-02-26 パナソニック株式会社 Clean room backflow prevention device
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Also Published As

Publication number Publication date
DE3881159D1 (en) 1993-06-24
EP0315943A3 (en) 1991-03-27
DE3738444A1 (en) 1989-05-24
US5144781A (en) 1992-09-08
ATE89631T1 (en) 1993-06-15
EP0315943A2 (en) 1989-05-17

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