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EP1078205B1 - Air cooling element, method for operating the same, and an air cooling arrangement - Google Patents

Air cooling element, method for operating the same, and an air cooling arrangement Download PDF

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Publication number
EP1078205B1
EP1078205B1 EP00904781A EP00904781A EP1078205B1 EP 1078205 B1 EP1078205 B1 EP 1078205B1 EP 00904781 A EP00904781 A EP 00904781A EP 00904781 A EP00904781 A EP 00904781A EP 1078205 B1 EP1078205 B1 EP 1078205B1
Authority
EP
European Patent Office
Prior art keywords
air
cooling
cooling element
chamber
element according
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
Application number
EP00904781A
Other languages
German (de)
French (fr)
Other versions
EP1078205A1 (en
Inventor
Helmuth Sokolean
Klaus Roschmann
Josef Ender
Beat Schönbächler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Barcol Air AG
Original Assignee
Barcol Air AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Application filed by Barcol Air AG filed Critical Barcol Air AG
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02Ducting arrangements
    • F24F13/06Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
    • F24F13/068Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser formed as perforated walls, ceilings or floors

Definitions

  • the invention relates to an air cooling element according to the Preamble of claim 1, a method for its operation and an air cooling arrangement.
  • air cooling elements and Air cooling arrangements are used to air-condition rooms used.
  • DE-A-44 21 167 is another Air distribution element for distributing cooled air known with a chamber which is one-sided of two parallel, slightly spaced fabric layers limited is. In this case, too, close control is required Air flow not possible.
  • the invention is based on the object Air cooling element to specify which control in particular restriction of the air flow in the cooling Space guaranteed. This task is characterized by the features in Characteristic of claim 1 solved. In addition, a suitable procedure for its operation as well as an air cooling arrangement that is simple Air cooling elements according to the invention is constructed.
  • the advantages achieved by the invention are above all in that the air supply in a very controlled and takes place evenly and also with high cooling capacity disruptive compact cold air flows in the room to be cooled be avoided.
  • the air cooling arrangement according to the invention can be made up of several connected air cooling elements on very can be built easily.
  • Air cooling elements according to the invention are usually mounted below the ceiling of a room to be cooled. How can be seen especially from FIGS. 1a, b a first embodiment of such an air cooling element a rectangular, underside facing the room in particular square cooling wall 1, which has a chamber 2 limited down. Chamber 2 is at the top limited by a partition 3 parallel to the cooling wall 1, which separates them from an antechamber 4 with which they an air inlet 5 is connected. Otherwise, the chamber 2 by two front walls 6, two side walls 7 and the Partition 3 sealed airtight, so that inflow of Cooling air is only possible through the air inlets 5 and Drain only through the cooling wall 1.
  • the cooling wall 1 also consists of solid air-impermeable Material. Their permeability is based only on Micro holes, preferably evenly over the Cooling wall 1 are distributed. You can in a regular, z. B. square grid at intervals of z. B. 5 mm be arranged.
  • the diameter of a micro hole can e.g. B. 0.5 mm. If possible, it should not be larger than 0.8 mm, preferably not larger than 0.6 mm.
  • the Proportion of free cross-section, i.e. H. the total area of the Micro holes on the surface of the cooling wall 1 should be as possible not more than 2%, preferably not more than 1%.
  • the antechamber 4 which has the same horizontal extent has like the chamber 2, is on the top by a Cover wall 8 and laterally also through the front walls 6 and Side walls 7 completed.
  • a Cover wall 8 At the top that shows Air cooling element in the middle of a wide recess 9 rectangular Cross section on, which is transverse to the front walls 6 is continuously formed.
  • Each of the front walls 6 has between its side edge and the recess 9 a Connection opening 10, which for producing a Connection of the pre-chamber 4 with that of an adjacent one Air cooling element or an air supply is used.
  • the two Connection openings 10 are each on different Sides of the central recess 9 arranged so that they are laterally relatively far apart. Apart from these air connections and the connection with the chamber 2 via the air inlets 5 is also the prechamber 4 essentially sealed airtight.
  • the front walls 6, the side walls 7, the partition 3 and the Cover wall 8 are preferably as aluminum plates trained and glued together.
  • the cooling wall 1 is preferably a Zinkor plate, i.e. H. a steel plate with a powder coating, which serves as corrosion protection and a high absorption coefficient for radiation in the Has infrared range. Its thickness is preferably not more than 1 mm, especially 0.62 mm. It is part a tub 11 which has a raised peripheral side wall 12, which has the lower sections of the front walls 6 and the side walls 7 of the chamber 2 with a small distance surrounds.
  • the side wall 12 has two on each side outgoing upper edge, each in a surrounding elongated indentation arranged slots 13, which each take a bolt 14 which in a Bore in the respective front wall 6 or side wall 7 is screwed in such a way that the over the edges of the Slots 13 projecting heads of the bolts 14 the Side wall 12 of the tub 11 on said walls of the chamber 2 clamp.
  • To create an airtight connection is between the lower edges of the front walls 6 and Side walls 7 on the one hand and the tub 11 on the other circumferential seal clamped. Because the tub 11 If something protrudes laterally, it is possible to use air cooling elements to be arranged in such a way that they connect seamlessly to one another.
  • connection openings 10 (see FIG. 4) in the Front walls 6 are round.
  • Connection opening 10 is in each case a sealing ring 15 attached, the inner edge of which protrudes freely beyond its edge and its outer edge area between the front wall 6 and a holding plate 16 connected to the same is clamped is.
  • the sealing ring 15 consists of a flat elastic material, preferably neoprene, and lies circular in the plane of the connection opening 10.
  • the air inlet 5, which connects the chamber 2 with the prechamber 4 connects, includes (Fig. 2a, b) a manifold 17, which is attached to the underside of the partition 3 and in the chamber 2 protrudes. It is cylindrical with on the top a round perforated cover 18, which by an annular mounting flange 19 is surrounded and on which is also connected by a perforated jacket 20. At the The underside is the manifold 17 of one continuous bottom 21 with no openings locked. It is slightly from the cooling wall 1, for. B. spaced about 2 mm apart. The cover 18 and the jacket 20 have z. B. round openings of 1 mm in diameter and have a hole percentage of approx. 22%.
  • the partition 3 has a circular above the manifold 17 Passage 22, whose diameter in the sense of a Setting the air flow the same size or how shown, can be chosen slightly smaller than that of Cover 18.
  • the outer leg of a rail 31a, b forms (Fig. 5a, b) a continuous upward-facing support strip 33, which is just above the lower edge through the Recess 30 runs.
  • Each air cooling element is on the two Ends of the recess 9 with two pairs of each other opposite holding cams 34 which above the bottom of the recess 9 attached to the side walls and protrude horizontally into it.
  • Each holding cam 34 is as z. B. manufactured by injection molding Plastic part formed and has a base 35 with a projecting support pin 36 and one to the base 35 adjoining tab 37, which on the side wall of the Recess is present.
  • Each holding cam 34 is on one of the side in the recess 9 projecting extension 38 of Front wall 6 plugged, which one of the base 35 and channel 39 penetrating support pin 36 without play is recorded. It is therefore simple reliably attached.
  • the support pin 36 lies on the Support strip 33 on, while the base 35 a side Sliding surface forms that against the outside of the outside Leg of the respective rail 31a; b has and as Stop works.
  • the air cooling element has two ends only little lateral play compared to the Rail arrangement, but is in the longitudinal direction of the rails 31a, b can be moved along.
  • the angle 25 hung at a distance from the ceiling, e.g. B. on downward anchored bolts. Then the rails 31a, b into the recesses 30 used and fixed by means of the bolts 32. On one end of the rails 31a, b is a z. B. as a clamp trained stop attached. Finally, from at the other end the air cooling elements 24a, b, c, d of a row postponed one after the other and finally by one behind the the last of the other attached stop fixed.
  • the air cooling elements are preferably of the same design.
  • connection is established in each case by the Connection opening 10 of the last pushed Air cooling element an end piece of a connecting nipple 40 (see also Fig. 6) is inserted.
  • the outside diameter of the Connection piece 40 is in each case slightly smaller than the diameter of the connection opening 10 receiving it, however larger than the inner diameter of the sealing ring 15, which is consequently under elastic stretch cuff-like on the outside of the connector 40 creates such that the connection essentially is airtight. This is supported in operation by that the pressure in the pre-chamber 4 of the air cooling element is somewhat is above the external pressure.
  • connection nipple 40 When the next air cooling element is pushed on, it pushes itself the other end of the connecting nipple 40 in it Connection opening 10 so that an exactly same density Connection arises. So that the connecting nipple 40 automatically positioned correctly, it has one in the middle circumferential bead 41, against the holding plates 16 of the forms two air cooling elements effective stop surfaces and finally lies between them with little play. It it is of course also possible to use the connecting nipple 40 one of the two air cooling elements fixed or z. B. means to connect a bayonet-like device releasably.
  • the Connection nipple 40 is preferably made of aluminum or Made of sheet steel.
  • the bead 41 can be compressed be made. Instead of the bead, one can welded or glued ring can be provided.
  • Air flow is distributed through the manifold 17 so that flows directly against the cooling wall 1 be avoided.
  • the chamber 2 there is only one a few Pa, typically approx. 10 Pa above the external pressure horizontal pressure built up, which is very even current of cooling air distributed over the surface of the cooling wall 1 through the micro holes into the room below caused.
  • the cooling wall 1 Since the cooling wall 1 has a very high thermal conductivity of approximately 100,000 W / m 2 K due to its small thickness of 0.62 mm and the high thermal conductivity of approximately 50 W / mK, the total heat transfer value between the air is in the Chamber 2 and the room air layer adjoining the cooling wall 1 are almost only limited by the heat transfer value on the outer surface, which can hardly be influenced, and are therefore relatively high.
  • the cooling effect is based on three mechanisms, namely the introduction of colder air into the room to be cooled the micro holes in the cooling wall 1, convection on the same and heat conduction through them as well Radiation exchange of those pointing towards the room Surface with objects in it.
  • Air cooling elements can be made approximately elongated and two or have more manifolds. Between successive air cooling elements one Air cooling arrangement can accommodate an exhaust vent or a lighting fixture provided larger distances be through at the ends like the connecting piece 40 trained longer connecting pipes are bridged.
  • Air cooling element according to a second embodiment, the is also characterized by low production costs schematically shown in Fig. 7a, b.
  • Chamber 2 is also limited at the bottom by a cooling wall 1, which like described in connection with the first embodiment is trained.
  • a cooling wall 1 which like described in connection with the first embodiment is trained.
  • it is part of a tub 11 with a raised peripheral side wall 12.
  • a housing 43 Cover wall 8 which has a flat central section has on both sides in sloping sections passes to which vertical side walls 7 connect as well as with front walls 6, which with connection openings 10 are provided.
  • a circumferential sealing strip 44 is made Foam rubber clamped.
  • the partition 3, which separates the antechamber 4 from the chamber 2 separates, is (Fig. 8a, b) as a tubular section of round Cross section formed on both sides of the Connects openings 10 in the front walls 6.
  • the air inlet 5 of the chamber 2 is through a variety of attached directly in the partition 3, namely from punched through openings formed in the lower, facing the cooling wall 1 area thereof in five rows 45a, b, c, d, e, each with angular positions of 0 °, Occupy ⁇ 30 ° and ⁇ 60 ° to the vertical.
  • In the individual openings are followed by the openings in Intervals of z. B. 4.5 mm on top of each other. Your diameter is z. B. 1.2 mm each.
  • the air cooling elements are suspended in (Fig. 9) similar to the first one Form of training described.
  • Form the air cooling elements Air cooling arrangements of rows arranged side by side, one row each on two rails 31a, b is slid on in the longitudinal direction at a distance successive crossbar 46 are attached.
  • the Rails 31a, b face each other at a distance horizontal bars running underneath the crossbars 46 47 with upwardly facing support strips 33 on which short horizontal holding plates 48 of the housing 43 are supported are on both sides, each following the Front panels 6, just outside the inner edges of the oblique sloping sections are attached to the top wall 8.
  • the middle is on both sides, slightly lower than that Holding plates 48, each with a stop plate 49 at an angle sloping section attached just below the Bottom of the web 47 is located and the mobility of the Housing 43 limited upwards, so that its height with close tolerance is set.
  • the cooling wall 1 is separate, independent of the housing 43 supported.
  • the air cooling element Clamping rails 50 there are two sides of the air cooling element Clamping rails 50 arranged, which by means of tapes 51st are also suspended from the crossbar 46.
  • the Clamping rail 50 each includes a sword 52 that between two rows of air cooling elements arranged side by side lies in such a way that the outside of the Side wall 12 of the tub 11 abuts the same. through a spring strip 53, which with a bent back lower end section in each case under retaining cams 54 on the The inside of said side wall 12 engages and the same presses against the sword 52, one edge of the tub 11 fixed.
  • connection between the antechambers 4 two successive air cooling portions of a series in turn by a connecting nipple 40 manufactured, whose outer diameter is slightly smaller than the inner diameter of the connection openings 10 and Antechambers 4. He points to his Position one in the middle between the air cooling elements 24a, b lie on circumferential bead 41. both sides the same is spaced apart with two on the outside successively revolving, as lip seals trained sealing rings 15 provided against the Are pressed inside the partition 3.
  • the housing 43 of the air cooling elements can each are successively slid onto the rails 31a, b, each with a connecting nipple 40 previously in the rear connection opening 10 is inserted, the protruding half into the front connection opening 10 of the housing then pushed open so that the connection establishes itself.
  • a lid of a similar design is inserted, which makes it tight closes.
  • the last housing is by means of a similarly funnel-shaped Connection nipple connected to an air supply line.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Duct Arrangements (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Aerials (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Nozzles (AREA)

Abstract

In order to achieve a high cooling power while avoiding troublesome cold air flows, a chamber (2) is sealed, from the room to be cooled, by a thin cooling wall (1) of powder-coated steel with micro-holes which are arranged in a square 5 mm grid and have a diameter of 0.5 mm and whose free cross-section is consequently less than 1%. An antechamber (4) which is connected to the chamber (2) through a partition (3) by means of a distributor nozzle (17) and has air connections for connection to an air supply or an adjacent air-cooling element is arranged above the chamber (2). The cool air is introduced into the chamber (2) via the distributor nozzle (17) in such a way that it passes with high turbulence along the inside of the cooling wall (1). An air-cooling arrangement consists of rows, arranged side by side, of air-cooling elements whose antechambers (4) are connected by connecting nipples which each project into connecting orifices (10) of adjacent air-cooling elements.

Description

Technisches GebietTechnical field

Die Erfindung betrifft ein Luftkühlelement gemäss dem Oberbegriff des Anspruchs 1, ein Verfahren zu seinem Betrieb sowie eine Luftkühlanordnung. Derartige Luftkühlelemente und Luftkühlanordnungen werden zur Klimatisierung von Räumen eingesetzt.The invention relates to an air cooling element according to the Preamble of claim 1, a method for its operation and an air cooling arrangement. Such air cooling elements and Air cooling arrangements are used to air-condition rooms used.

Stand der TechnikState of the art

Aus GB-A-2 033 075 ist ein in seinem grundsätzlichen Aufbau gattungsgemässes Luftverteilungselement bekannt, das der Zuleitung von Luft zu einem industriellen Arbeitsplatz dient. Die Kammer ist durch eine Reihe von Perforationen in einer Trennwand mit einer mit einem Luftanschluss versehenen Vorkammer verbunden. Die Kammer weist eine poröse Wand auf, durch welche die Luft ausströmt. Dies lässt jedoch keine genaue Kontrolle des Luftstroms zu. Das bekannte Luftverteilungselement ist daher nicht geeignet, bei ausreichender Kühlwirkung zugleich zu gewährleisten, dass keine störenden Kaltluftströmungen auftreten.From GB-A-2 033 075 is in its basic structure Generic air distribution element known that the Air supply to an industrial workplace serves. The chamber is in through a series of perforations a partition with an air connection Antechamber connected. The chamber has a porous wall, through which the air flows out. However, this leaves no precise control of the airflow too. The known Air distribution element is therefore not suitable for sufficient cooling effect to ensure at the same time that no disturbing cold air flows occur.

Aus der DE-A-44 21 167 ist ein weiteres Luftverteilungselement zum Verteilen auch gekühlter Luft bekannt mit einer Kammer, welche einseitig von zwei parallelen, geringfügig beabstandeten Gewebelagen begrenzt ist. Auch in diesem Fall ist eine genaue Kontrolle der Luftströmung nicht möglich. DE-A-44 21 167 is another Air distribution element for distributing cooled air known with a chamber which is one-sided of two parallel, slightly spaced fabric layers limited is. In this case, too, close control is required Air flow not possible.

Darstellung der ErfindungPresentation of the invention

Der Erfindung liegt die Aufgabe zu Grunde, ein Luftkühlelement anzugeben, welches eine Kontrolle, insbesondere Beschränkung des Luftstroms in den zu kühlenden Raum gewährleistet. Diese Aufgabe wird durch die Merkmale im Kennzeichen des Anspruchs 1 gelöst. Ausserdem soll ein geeignetes Verfahren zu seinem Betrieb angegeben werden sowie eine Luftkühlanordnung, die in einfacher Weise aus erfindungsgemässen Luftkühlelementen aufgebaut ist.The invention is based on the object Air cooling element to specify which control in particular restriction of the air flow in the cooling Space guaranteed. This task is characterized by the features in Characteristic of claim 1 solved. In addition, a suitable procedure for its operation as well as an air cooling arrangement that is simple Air cooling elements according to the invention is constructed.

Die durch die Erfindung erzielten Vorteile liegen vor allem darin, dass die Luftzuführung in sehr kontrollierter und gleichmässiger Weise erfolgt und auch bei hoher Kühlleistung störende kompakte Kaltluftströme im zu kühlenden Raum vermieden werden. Die erfindungsgemässe Luftkühlanordnung kann aus mehreren verbundenen Luftkühlelementen auf sehr einfache Weise aufgebaut werden.The advantages achieved by the invention are above all in that the air supply in a very controlled and takes place evenly and also with high cooling capacity disruptive compact cold air flows in the room to be cooled be avoided. The air cooling arrangement according to the invention can be made up of several connected air cooling elements on very can be built easily.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Im folgenden wird die Erfindung anhand von Figuren, welche lediglich ein Ausführungsbeispiel darstellen, näher erläutert. Es zeigen

Fig. 1a
eine Draufsicht auf ein erfindungsgemässes Luftkühlelement gemäss einer ersten Ausführungsform,
Fig. 1b
einen Schnitt längs B-B in Fig. 1a,
Fig. 2a
eine Draufsicht auf einen Verteilerstutzen des erfindungsgemässen Luftkühlelements gemäss der ersten Ausführungsform,
Fig. 2b
einen Schnitt durch den Verteilerstutzen und eine Trennwand, an der er befestigt ist, entsprechend B-B in Fig. 3a,
Fig. 3
eine Draufsicht auf eine erfindungsgemässe Luftkühlanordnung aus Luftkühlelementen gemäss der ersten Ausführungsform,
Fig. 4
eine Frontansicht eines erfindungsgemässen Luftkühlelements gemäss der ersten Ausführungsform in der Luftkühlanordnung gemäss Fig. 3,
Fig. 5a
vergrössert ein Detail der erfindungsgemässen Luftkühlanordnung entsprechend einem Schnitt längs V-V in Fig. 4,
Fig. 5b
einen Schnitt längs B-B in Fig. 5a,
Fig. 6
einen Schnitt durch eine Verbindung zwischen zwei aufeinanderfolgenden Luftkühlelementen in einer erfindungsgemässen Luftkühlanordnung nach Fig. 4
Fig. 7a
eine Draufsicht auf ein erfindungsgemässes Luftkühlelement gemäss einer zweiten Ausführungsform,
Fig. 7b
einen Schnitt längs B-B in Fig. 7a,
Fig. 8a
einen Schnitt durch eine Trennwand des erfindungsgemässen Luftkühlelements gemäss der zweiten Ausführungsform,
Fig. 8b
eine Unteransicht der Trennwand nach Fig. 8a,
Fig. 9
einen Schnitt durch einen Teil eines Luftkühlelements gemäss der zweiten Ausführungsform in einer erfindungsgemässen Luftkühlanordnung und
Fig. 10
einen Schnitt durch eine Verbindung zwischen zwei aufeinanderfolgenden Luftkühlelementen gemäss der zweiten Ausführungsform in der erfindungsgemässen Luftkühlanordnung.
In the following, the invention is explained in more detail with reference to figures, which only represent an exemplary embodiment. Show it
Fig. 1a
3 shows a plan view of an air cooling element according to the invention in accordance with a first embodiment,
Fig. 1b
2 shows a section along BB in FIG. 1a,
Fig. 2a
2 shows a plan view of a distributor connector of the air cooling element according to the invention in accordance with the first embodiment,
Fig. 2b
a section through the manifold and a partition to which it is attached, corresponding to BB in Fig. 3a,
Fig. 3
2 shows a plan view of an air cooling arrangement according to the invention made of air cooling elements according to the first embodiment,
Fig. 4
3 shows a front view of an air cooling element according to the invention in accordance with the first embodiment in the air cooling arrangement according to FIG. 3,
Fig. 5a
4 enlarges a detail of the air cooling arrangement according to the invention in accordance with a section along VV in FIG. 4,
Fig. 5b
4 shows a section along BB in FIG. 5a,
Fig. 6
4 shows a section through a connection between two successive air cooling elements in an air cooling arrangement according to the invention according to FIG. 4
Fig. 7a
2 shows a top view of an air cooling element according to the invention in accordance with a second embodiment,
Fig. 7b
6 shows a section along BB in FIG. 7a,
Fig. 8a
2 shows a section through a partition wall of the air cooling element according to the invention in accordance with the second embodiment,
Fig. 8b
a bottom view of the partition according to Fig. 8a,
Fig. 9
a section through part of an air cooling element according to the second embodiment in an air cooling arrangement according to the invention and
Fig. 10
a section through a connection between two successive air cooling elements according to the second embodiment in the air cooling arrangement according to the invention.

Wege zur Ausführung der ErfindungWays of Carrying Out the Invention

Erfindungsgemässe Luftkühlelemente werden in der Regel unterhalb der Decke eines zu kühlenden Raumes montiert. Wie vor allem aus den Figuren 1a,b ersichtlich, weist gemäss einer ersten Ausführungsform ein solches Luftkühlelement an der dem Raum zugewandten Unterseite eine rechteckige, insbesondere quadratische Kühlwand 1 auf, welche eine Kammer 2 nach unten begrenzt. An der Oberseite ist die Kammer 2 durch eine zur Kühlwand 1 parallele Trennwand 3 begrenzt, welche sie von einer Vorkammer 4 trennt, mit der sie über einen Lufteinlass 5 verbunden ist. Im übrigen ist die Kammer 2 durch zwei Frontwände 6, zwei Seitenwände 7 und die Trennwand 3 luftdicht verschlossen, so dass Zufluss von Kühlluft nur durch die Lufteinlässe 5 möglich ist und Abfluss lediglich durch die Kühlwand 1.Air cooling elements according to the invention are usually mounted below the ceiling of a room to be cooled. How can be seen especially from FIGS. 1a, b a first embodiment of such an air cooling element a rectangular, underside facing the room in particular square cooling wall 1, which has a chamber 2 limited down. Chamber 2 is at the top limited by a partition 3 parallel to the cooling wall 1, which separates them from an antechamber 4 with which they an air inlet 5 is connected. Otherwise, the chamber 2 by two front walls 6, two side walls 7 and the Partition 3 sealed airtight, so that inflow of Cooling air is only possible through the air inlets 5 and Drain only through the cooling wall 1.

Auch die Kühlwand 1 besteht aus festem luftundurchlässigen Material. Ihre Durchlässigkeit beruht lediglich auf Mikrolöchern, die vorzugsweise gleichmässig über die Kühlwand 1 verteilt sind. Sie können in einem regelmässigen, z. B. quadratischen Raster in Abständen von z. B. 5 mm angeordnet sein. Der Durchmesser eines Mikrolochs kann z. B. 0,5 mm betragen. Er sollte möglichst nicht grösser als 0,8 mm, vorzugsweise nicht grosser als 0,6 mm sein. Der Anteil des freien Querschnitts, d. h. der Gesamtfläche der Mikrolöcher an der Fläche der Kühlwand 1 sollte möglichst nicht mehr als 2%, vorzugsweise nicht mehr als 1% betragen.The cooling wall 1 also consists of solid air-impermeable Material. Their permeability is based only on Micro holes, preferably evenly over the Cooling wall 1 are distributed. You can in a regular, z. B. square grid at intervals of z. B. 5 mm be arranged. The diameter of a micro hole can e.g. B. 0.5 mm. If possible, it should not be larger than 0.8 mm, preferably not larger than 0.6 mm. The Proportion of free cross-section, i.e. H. the total area of the Micro holes on the surface of the cooling wall 1 should be as possible not more than 2%, preferably not more than 1%.

Die Vorkammer 4, welche die gleiche horizontale Ausdehnung hat wie die Kammer 2, ist an der Oberseite durch eine Deckwand 8 und seitlich ebenfalls durch die Frontwände 6 und Seitenwände 7 abgeschlossen. An der Oberseite weist das Luftkühlelement mittig eine breite Ausnehmung 9 rechteckigen Querschnitts auf, welche quer zu den Frontwanden 6 durchgehend ausgebildet ist. Jede der Frontwände 6 weist zwischen ihrem Seitenrand und der Ausnehmung 9 eine Verbindungsöffnung 10 auf, welche zur Herstellung einer Verbindung der Vorkammer 4 mit der eines benachbarten Luftkühlelements oder einer Luftzuführung dient. Die beiden Verbindungsöffnungen 10 sind jeweils auf verschiedenen Seiten der mittigen Ausnehmung 9 angeordnet, so dass sie seitlich verhältnismässig weit gegeneinander versetzt sind. Abgesehen von diesen Luftanschlüssen und der Verbindung mit der Kammer 2 über die Lufteinlässe 5 ist auch die Vorkammer 4 im wesentlichen luftdicht verschlossen.The antechamber 4, which has the same horizontal extent has like the chamber 2, is on the top by a Cover wall 8 and laterally also through the front walls 6 and Side walls 7 completed. At the top that shows Air cooling element in the middle of a wide recess 9 rectangular Cross section on, which is transverse to the front walls 6 is continuously formed. Each of the front walls 6 has between its side edge and the recess 9 a Connection opening 10, which for producing a Connection of the pre-chamber 4 with that of an adjacent one Air cooling element or an air supply is used. The two Connection openings 10 are each on different Sides of the central recess 9 arranged so that they are laterally relatively far apart. Apart from these air connections and the connection with the chamber 2 via the air inlets 5 is also the prechamber 4 essentially sealed airtight.

Die Frontwände 6, die Seitenwände 7, die Trennwand 3 und die Deckwand 8 sind vorzugsweise als Aluminiumplatten ausgebildet und miteinander verklebt. Die Kühlwand 1 ist vorzugsweise eine Zinkorplatte, d. h. eine Stahlplatte mit einer Pulverbeschichtung, welche als Korrosionsschutz dient und einen hohen Absorptionskoeffizienten für Strahlung im Infrarotbereich aufweist. Ihre Dicke beträgt vorzugsweise nicht mehr als 1 mm, insbesondere 0,62 mm. Sie ist Teil einer Wanne 11, die eine hochgezogene umlaufende Seitenwand 12 aufweist, welche die unteren Abschnitte der Frontwände 6 und die Seitenwände 7 der Kammer 2 mit geringem Abstand umgibt. Die Seitenwand 12 weist auf jeder Seite zwei vom oberen Rand ausgehende, jeweils in einer sie umgebenden länglichen Einbuchtung angeordnete Schlitze 13 auf, welche jeweils einen Schraubenbolzen 14 aufnehmen, der in eine Bohrung in der jeweiligen Frontwand 6 oder Seitenwand 7 eingeschraubt ist, derart, dass die über die Ränder der Schlitze 13 überstehenden Köpfe der Schraubenbolzen 14 die Seitenwand 12 der Wanne 11 an den besagten Wänden der Kammer 2 festklemmen. Zur Herstellung einer luftdichten Verbindung ist zwischen den unteren Rändern der Frontwände 6 und der Seitenwände 7 einerseits und der Wanne 11 andererseits eine umlaufende Dichtung geklemmt. Dadurch, dass die Wanne 11 seitlich etwas übersteht, ist es möglich, Luftkühlelemente so anzuordnen, dass sie lückenlos aneinander anschliessen.The front walls 6, the side walls 7, the partition 3 and the Cover wall 8 are preferably as aluminum plates trained and glued together. The cooling wall 1 is preferably a Zinkor plate, i.e. H. a steel plate with a powder coating, which serves as corrosion protection and a high absorption coefficient for radiation in the Has infrared range. Its thickness is preferably not more than 1 mm, especially 0.62 mm. It is part a tub 11 which has a raised peripheral side wall 12, which has the lower sections of the front walls 6 and the side walls 7 of the chamber 2 with a small distance surrounds. The side wall 12 has two on each side outgoing upper edge, each in a surrounding elongated indentation arranged slots 13, which each take a bolt 14 which in a Bore in the respective front wall 6 or side wall 7 is screwed in such a way that the over the edges of the Slots 13 projecting heads of the bolts 14 the Side wall 12 of the tub 11 on said walls of the chamber 2 clamp. To create an airtight connection is between the lower edges of the front walls 6 and Side walls 7 on the one hand and the tub 11 on the other circumferential seal clamped. Because the tub 11 If something protrudes laterally, it is possible to use air cooling elements to be arranged in such a way that they connect seamlessly to one another.

Die Verbindungsöffnungen 10 (s. a. Fig. 4) in den Frontwänden 6 sind rund. Im Randbereich einer Verbindungsöffnung 10 ist jeweils ein Dichtungsring 15 angebracht, dessen Innenrand frei über ihren Rand übersteht und dessen äusserer Randbereich zwischen der Frontwand 6 und einer mit derselben verbundenen Halteplatte 16 festgeklemmt ist. Der Dichtungsring 15 besteht aus einem flächigen elastischen Material, vorzugsweise Neopren, und liegt kreisringförmig in der Ebene der Verbindungsöffnung 10.The connection openings 10 (see FIG. 4) in the Front walls 6 are round. In the marginal area Connection opening 10 is in each case a sealing ring 15 attached, the inner edge of which protrudes freely beyond its edge and its outer edge area between the front wall 6 and a holding plate 16 connected to the same is clamped is. The sealing ring 15 consists of a flat elastic material, preferably neoprene, and lies circular in the plane of the connection opening 10.

Der Lufteinlass 5, welcher die Kammer 2 mit der Vorkammer 4 verbindet, umfasst (Fig. 2a,b) einen Verteilerstutzen 17, der an der Unterseite der Trennwand 3 befestigt ist und in die Kammer 2 hineinragt. Er ist zylindrisch ausgebildet mit an der Oberseite einem runden gelochten Deckel 18, der von einem ringförmigen Befestigungsflansch 19 umgeben ist und an den ein ebenfalls gelochter Mantel 20 anschliesst. An der Unterseite ist der Verteilerstutzen 17 von einem durchgehenden, keine Oeffnungen aufweisenden Boden 21 verschlossen. Er ist von der Kühlwand 1 geringfügig, z. B. um ca. 2 mm beabstandet. Der Deckel 18 und der Mantel 20 weisen z. B. runde Durchtrittsöffnungen von 1 mm Durchmesser auf und haben einen Lochanteil von ca. 22%. Die Trennwand 3 weist oberhalb des Verteilerstutzens 17 einen kreisrunden Durchlass 22 auf, dessen Durchmesser im Sinne einer Einstellung der Luftströmung gleich gross oder, wie dargestellt, etwas kleiner gewählt sein kann als der des Deckels 18.The air inlet 5, which connects the chamber 2 with the prechamber 4 connects, includes (Fig. 2a, b) a manifold 17, which is attached to the underside of the partition 3 and in the chamber 2 protrudes. It is cylindrical with on the top a round perforated cover 18, which by an annular mounting flange 19 is surrounded and on which is also connected by a perforated jacket 20. At the The underside is the manifold 17 of one continuous bottom 21 with no openings locked. It is slightly from the cooling wall 1, for. B. spaced about 2 mm apart. The cover 18 and the jacket 20 have z. B. round openings of 1 mm in diameter and have a hole percentage of approx. 22%. The partition 3 has a circular above the manifold 17 Passage 22, whose diameter in the sense of a Setting the air flow the same size or how shown, can be chosen slightly smaller than that of Cover 18.

In der Regel wird an der Decke des zu kühlenden Raumes (Fig. 3) eine Luftkühlanordnung 23, die jeweils aus mehreren parallelen Reihen von Luftkühlelementen 24a,b,c,d der beschriebenen Art bestehen, derart an einer Befestigungseinrichtung aufgehängt, dass die Kühlwände 1 lückenlos oder mit einer definierten Fuge aneinander anschliessen. Dazu werden an der Decke in Abständen, welche jeweils z. B. der doppelten Länge eines Luftkühlelements entsprechen, parallele Winkel 25 (s. a. Fig. 4) befestigt, mit jeweils einem horizontalen Flansch 26 und einem von demselben nach unten ragenden vertikalen Streifen 27, der mehrere - im dargestellten Fall sind es zwei - von Zwischenräumen 28 getrennte breite Laschen 29 bildet, welche an den Seitenrändern etwa C-förmige seitliche Ausnehmungen 30 aufweisen.As a rule, the ceiling of the room to be cooled (Fig. 3) an air cooling arrangement 23, each of several parallel rows of air cooling elements 24a, b, c, d the described type exist in such a way Fastening device suspended that the cooling walls 1 together without gaps or with a defined joint connect. For this purpose, which are at intervals on the ceiling each z. B. twice the length of an air cooling element correspond, parallel angle 25 (see FIG. 4) attached, each with a horizontal flange 26 and one of the same downstanding vertical strip 27, the several - in the case shown there are two - of Spaces 28 separate wide tabs 29, which C-shaped lateral recesses on the side edges 30 have.

Durch in einer Linie liegende Ausnehmungen 30 aufeinanderfolgender Winkel 25 sind jeweils Schienen 31a,b C-förmigen Querschnitts gelegt. Sie sind an der Unterseite sowie seitlich durch von den Rändern der Ausnehmungen 30 gebildete Anschläge in denselben fixiert und positioniert. Damit die Schienen 31a,b in leicht verdrehtem Zustand in die Ausnehmungen 30 eingeführt werden können, sind dieselben so ausgelegt, dass die Schienen 31a,b vertikal etwas Spiel haben. Fixiert werden sie dann jeweils mittels eines Schraubenbolzens 32, der in eine Gewindebohrung des Flansches 26 eingeschraubt und abgesenkt wird, bis er mit seinem unteren Ende gegen die Oberseite der Schiene 31a,b drückt.Through recesses 30 lying in a line successive angles 25 are rails 31a, b C-shaped cross section. They are at the bottom and laterally through from the edges of the recesses 30 formed stops fixed and positioned in the same. So that the rails 31a, b in the slightly twisted state in the Recesses 30 can be inserted, they are the same designed that the rails 31a, b have some play vertically to have. They are then fixed using a Bolt 32, which in a threaded bore of the Flange 26 is screwed in and lowered until it with its lower end against the top of the rail 31a, b suppressed.

Der äussere Schenkel einer Schiene 31a,b bildet (Fig. 5a,b) einen durchgehenden nach oben weisenden Auflagestreifen 33, welcher etwas oberhalb des unteren Randes durch die Ausnehmung 30 läuft. Jedes Luftkühlelement ist an den beiden Enden der Ausnehmung 9 mit zwei Paaren einander gegenüberliegender Haltenocken 34 versehen, welche oberhalb des Grundes der Ausnehmung 9 an deren Seitenwänden befestigt sind und waagrecht in sie hineinragen. Jeder Haltenocken 34 ist als z. B. im Spritzgussverfahren hergestelltes Kunststoffteil ausgebildet und weist eine Basis 35 mit einem vorstehenden Auflagezapfen 36 auf sowie eine an die Basis 35 anschliessende Lasche 37, welche an der Seitenwand der Ausnehmung anliegt. Jeder Haltenocken 34 ist auf einen von der Seite in die Ausnehmung 9 ragenden Fortsatz 38 der Frontwand 6 aufgesteckt, welcher von einem die Basis 35 und den Auflagezapfen 36 durchdringenden Kanal 39 spielfrei aufgenommen wird. Er ist dadurch auf einfache Weise zuverlässig befestigt. Der Auflagezapfen 36 liegt auf dem Auflagestreifen 33 auf, während die Basis 35 eine seitliche Gleitfläche bildet, die gegen die Aussenseite des äusseren Schenkels der jeweiligen Schiene 31a;b weist und als Anschlag wirkt. Das Luftkühlelement hat so an beiden Enden nur geringes seitliches Spiel gegenüber der Schienenanordnung, ist aber in Längsrichtung den Schienen 31a,b entlang verschiebbar.The outer leg of a rail 31a, b forms (Fig. 5a, b) a continuous upward-facing support strip 33, which is just above the lower edge through the Recess 30 runs. Each air cooling element is on the two Ends of the recess 9 with two pairs of each other opposite holding cams 34 which above the bottom of the recess 9 attached to the side walls and protrude horizontally into it. Each holding cam 34 is as z. B. manufactured by injection molding Plastic part formed and has a base 35 with a projecting support pin 36 and one to the base 35 adjoining tab 37, which on the side wall of the Recess is present. Each holding cam 34 is on one of the side in the recess 9 projecting extension 38 of Front wall 6 plugged, which one of the base 35 and channel 39 penetrating support pin 36 without play is recorded. It is therefore simple reliably attached. The support pin 36 lies on the Support strip 33 on, while the base 35 a side Sliding surface forms that against the outside of the outside Leg of the respective rail 31a; b has and as Stop works. The air cooling element has two ends only little lateral play compared to the Rail arrangement, but is in the longitudinal direction of the rails 31a, b can be moved along.

Zur Herstellung einer Luftkühlanordnung werden also zuerst die Winkel 25 mit Abstand unter der Decke aufgehängt, z. B. an in derselben verankerten nach unten weisenden Bolzen. Dann werden die Schienen 31a,b in die Ausnehmungen 30 eingesetzt und mittels der Schraubenbolzen 32 fixiert. An einem Ende der Schienen 31a,b wird ein z. B. als Klemmstück ausgebildeter Anschlag angebracht. Schliesslich werden vom anderen Ende her die Luftkuhlelemente 24a,b,c,d einer Reihe nacheinander aufgeschoben und zuletzt durch einen hinter dem letzten derselben angebrachten weiteren Anschlag fixiert. Die Luftkühlelemente sind vorzugsweise gleich ausgebildet. Lediglich beim ersten Luftkuhlelement 24a wird vor dem Aufschieben desselben die Verbindungsöffnung in der die Reihe abschliessenden Frontwand durch eine Abschlussplatte verschlossen, welche der Halteplatte 16 entspricht, jedoch keine Oeffnung aufweist. Das zuletzt aufgeschobene Luftkühlelement 24d wird schliesslich mittels eines etwas längeren Anschlussstutzens 42 an eine Zuluftleitung angeschlossen.So to make an air cooling arrangement, first the angle 25 hung at a distance from the ceiling, e.g. B. on downward anchored bolts. Then the rails 31a, b into the recesses 30 used and fixed by means of the bolts 32. On one end of the rails 31a, b is a z. B. as a clamp trained stop attached. Finally, from at the other end the air cooling elements 24a, b, c, d of a row postponed one after the other and finally by one behind the the last of the other attached stop fixed. The air cooling elements are preferably of the same design. Only in the first air cooling element 24a is before the Sliding the connection opening in the Front wall that closes the row with an end plate closed, which corresponds to the holding plate 16, however has no opening. The last postponed Air cooling element 24d is finally something longer connection piece 42 to a supply air line connected.

Die Verbindung wird jeweils hergestellt, indem in die Verbindungsöffnung 10 des zuletzt aufgeschobenen Luftkühlelements ein Endstück eines Verbindungsnippels 40 (s. a. Fig. 6) eingeschoben wird. Der Aussendurchmesser des Verbindungsstutzens 40 ist jeweils geringfügig kleiner als der Durchmesser der ihn aufnehmenden Verbindungsöffnung 10, jedoch grösser als der Innendurchmesser des Dichtungsrings 15, der sich folglich unter elastischer Dehnung manschettenartig an die Aussenseite des Verbindungsstutzens 40 derart anlegt, dass die Verbindung im wesentlichen luftdicht ist. Dies wird im Betrieb dadurch unterstützt, dass der Druck in der Vorkammer 4 des Luftkühlelements etwas über dem Aussendruck liegt.The connection is established in each case by the Connection opening 10 of the last pushed Air cooling element an end piece of a connecting nipple 40 (see also Fig. 6) is inserted. The outside diameter of the Connection piece 40 is in each case slightly smaller than the diameter of the connection opening 10 receiving it, however larger than the inner diameter of the sealing ring 15, which is consequently under elastic stretch cuff-like on the outside of the connector 40 creates such that the connection essentially is airtight. This is supported in operation by that the pressure in the pre-chamber 4 of the air cooling element is somewhat is above the external pressure.

Beim Aufschieben des nächsten Luftkühlelements schiebt sich das andere Endstück des Verbindungsnippels 40 in dessen Verbindungsöffnung 10, so dass eine genau gleiche dichte Verbindung entsteht. Damit der Verbindungsnippel 40 dabei selbsttätig richtig positioniert wird, weist er mittig einen umlaufenden Wulst 41 auf, der gegen die Halteplatten 16 der beiden Luftkühlelemente wirksame Anschlagflächen bildet und schliesslich mit geringem Spiel zwischen denselben liegt. Es ist natürlich auch möglich, den Verbindungsnippel 40 mit einem der beiden Luftkühlelemente fest oder z. B. mittels einer bajonettartigen Einrichtung lösbar zu verbinden. Der Verbindungsnippel 40 ist vorzugsweise aus Aluminium- oder Stahlblech hergestellt. Der Wulst 41 kann durch Stauchen hergestellt sein. Statt des Wulstes kann auch ein angeschweisster oder angeklebter Ring vorgesehen werden.When the next air cooling element is pushed on, it pushes itself the other end of the connecting nipple 40 in it Connection opening 10 so that an exactly same density Connection arises. So that the connecting nipple 40 automatically positioned correctly, it has one in the middle circumferential bead 41, against the holding plates 16 of the forms two air cooling elements effective stop surfaces and finally lies between them with little play. It it is of course also possible to use the connecting nipple 40 one of the two air cooling elements fixed or z. B. means to connect a bayonet-like device releasably. The Connection nipple 40 is preferably made of aluminum or Made of sheet steel. The bead 41 can be compressed be made. Instead of the bead, one can welded or glued ring can be provided.

Im Betrieb fliesst durch die nicht dargestellte Zuluftleitung von einem Kühlaggregat kommende, unter leichtem Ueberdruck stehende Kühlluft in die Vorkammer 4 des Luftkühlelements 24d und verteilt sich durch die beschriebenen Verbindungen über die Vorkammern 4 der weiteren Luftkühlelemente 24c,b,a. In jedem der Luftkühlelemente 24a,b,c,d fliesst nun Kühlluft von der Vorkammer 4 durch den Lufteinlass 5 in die Kammer 2. Wegen des verhältnismässig grossen Querschnitts der Verbindungen zwischen den Vorkammern 4 der Luftkühlelemente 24a,b,c,d und des jeweils bedeutend kleineren Querschnitts der Durchtrittsöffnungen des Lufteinlasses 5 zwischen der Vorkammer 4 und der Kammer 2 in jedem derselben tritt jeweils zwischen der Vorkammer 4 und der Kammer 2 eines jeden Luftkühlelements ein leichter Druckabfall, typischerweise um ca. 60 Pa auf, während in den Vorkammern 4 der verschiedenen Luftkühlelemente 24a,b,c,d im wesentlichen der gleiche Druck herrscht.In operation flows through the not shown Supply air line coming from a cooling unit, under slightly overpressure cooling air in the antechamber 4 of the Air cooling element 24d and distributed through the described connections via the antechambers 4 of the further air cooling elements 24c, b, a. In each of the Air cooling elements 24a, b, c, d now flows cooling air from the Pre-chamber 4 through the air inlet 5 into chamber 2. Because the relatively large cross-section of the connections between the antechambers 4 of the air cooling elements 24a, b, c, d and of the significantly smaller cross section of the Through openings of the air inlet 5 between the Antechamber 4 and chamber 2 occur in each of them in each case between the pre-chamber 4 and the chamber 2 every air cooling element has a slight pressure drop, typically around 60 Pa, while in the antechambers 4 of the various air cooling elements 24a, b, c, d essentially there is the same pressure.

Der durch den Lufteinlass 5 in die Kammer 2 dringende Luftstrom wird durch den Verteilerstutzen 17 so verteilt, dass direkt gegen die Kühlwand 1 gerichtete Strömungen vermieden werden. In der Kammer 2 wird dabei ein lediglich einige Pa, typischerweise ca. 10 Pa über dem Aussendruck liegender Druck aufgebaut, welcher einen sehr gleichmässig über die Fläche der Kühlwand 1 verteilten Strom von Kühlluft durch die Mikrolöcher in den darunterliegenden Raum verursacht. Durch die Zwischenschaltung zweier jeweils einen verhältnismässig hohen Strömungswiderstand aufweisender Schranken zwischen der Luftzuführung und dem zu kühlenden Raum - jeweils zwischen der Vorkammer 4 und der Kammer 2, zwischen denen im beschriebenen Fall 6/7 und in der Regel mindestens 3/4 des gesamten Druckabfalls eintritt, und der Kammer 2 und dem Raum - wird jedes Durchschlagen der Strömungen, die mit der Kühlluftzufuhr zwangsläufig verbunden sind, auf den Raum zuverlässig vermieden. Auch Ungleichmässigkeit der Kühlung wegen der unterschiedlichen Lage zur Luftzuführung kann nicht eintreten.The penetrating into the chamber 2 through the air inlet 5 Air flow is distributed through the manifold 17 so that flows directly against the cooling wall 1 be avoided. In the chamber 2 there is only one a few Pa, typically approx. 10 Pa above the external pressure horizontal pressure built up, which is very even current of cooling air distributed over the surface of the cooling wall 1 through the micro holes into the room below caused. By interposing two each relatively high flow resistance Barriers between the air supply and the one to be cooled Space - between the antechamber 4 and the chamber 2, between those in the case described 6/7 and usually at least 3/4 of the total pressure drop occurs, and the Chamber 2 and the room - every punching through will Currents inevitable with the cooling air supply are reliably avoided to the room. Also Uneven cooling due to the different Air supply position cannot occur.

Wegen des geringen freien Querschnitts der Kühlwand 1 verbleibt die Luft im Mittel verhältnismässig lang in der Kammer 2, so dass schon vor ihrem Austritt ein Wärmeaustausch mit dem zu kühlenden Raum stattfindet. Insbesondere wird dadurch, dass die Luft in verhältnismässig geringer Entfernung von der Kühlwand 1 im wesentlichen parallel zu derselben in die Kammer 2 eingeblasen wird, eine an der Innenfläche der Kühlwand 1 entlangstreichende Strömung erzeugt, die, da die Luft bereits durch den gelochten Deckel 18 und den gelochten Mantel 20 des Verteilerstutzens 17 geströmt ist und dabei stark verwirbelt wurde, auch hochturbulent ist.Because of the small free cross section of the cooling wall 1 the air remains in the air for a comparatively long time Chamber 2, so that before they leave Heat exchange takes place with the room to be cooled. In particular, this means that the air in proportion short distance from the cooling wall 1 essentially is blown into the chamber 2 parallel to the same, one along the inner surface of the cooling wall 1 Flow generated because the air is already through the perforated cover 18 and the perforated jacket 20 of the Distributor nozzle 17 is flowed and swirled strongly was also very turbulent.

Dies führt bereits bei der im Normalbetrieb zugeführten Nominalluftmenge von 45 m/h zu einem hohen Wärmeübergangswert an der Grenzschicht von i. a. ca. 100 W/m2K, gewöhnlich über 80 W/m2K, auf jeden Fall aber über 50 W/m2K an dieser Fläche, zumal der Wärmeübergang auch durch Strahlungsaustausch zwischen der Innenseite der Kühlwand 1 und der Trennwand 3 unterstützt wird. Da die Kühlwand 1 wegen ihrer geringen Dicke von 0,62 mm und der hohen Wärmeleitfähigkeit von ca. 50 W/mK einen sehr hohen Wärmeleitwert von ca. 100'000 W/m2K aufweist, ist der gesamte Wärmeübergangswert zwischen der Luft in der Kammer 2 und der an die Kühlwand 1 grenzenden Raumluftschicht fast nur durch den wenig beeinflussbaren Wärmeübergangswert an der Aussenfläche begrenzt und daher verhältnismässig hoch.Even with the nominal air volume of 45 m / h supplied during normal operation, this leads to a high heat transfer value at the boundary layer of generally approx. 100 W / m 2 K, usually over 80 W / m 2 K, but in any case over 50 W / m 2 K on this surface, especially since the heat transfer is also supported by radiation exchange between the inside of the cooling wall 1 and the partition wall 3. Since the cooling wall 1 has a very high thermal conductivity of approximately 100,000 W / m 2 K due to its small thickness of 0.62 mm and the high thermal conductivity of approximately 50 W / mK, the total heat transfer value between the air is in the Chamber 2 and the room air layer adjoining the cooling wall 1 are almost only limited by the heat transfer value on the outer surface, which can hardly be influenced, and are therefore relatively high.

Folglich wird durch die Kühlwand 1 hindurch zwischen der Luft in der kammer 2 und der Raumluft auf höchst wirksame Weise Wärme ausgetauscht, was einerseits zur Kühlung der letzteren auf eine keine störenden Strömungen verursachende Weise beiträgt, andererseits aber die erstere vorwärmt, so dass ihre Austrittstemperatur spürbar höher ist als die Temperatur, die sie beim Eintritt in die Kammer 2 hat, was die Gefahr von störenden Kaltluftströmungen vermindert. Die Kühlwand 1, die durch die Kühlluft auf einer verhältnismässig tiefen Temperatur gehalten wird, unterstützt die Kühlwirkung ausserdem durch Strahlungsaustausch mit dem zu kühlenden Raum. Wegen des geringen Anteils an freiem Querschnitt ist ihre diesbezügliche Wirksamkeit praktisch ungeschmälert.Consequently, through the cooling wall 1 between the Air in chamber 2 and the room air to be highly effective Way heat exchanged, which on the one hand to cool the the latter on a non-disturbing flow Contributes wisely, but on the other hand preheats the former, so that their outlet temperature is noticeably higher than that Temperature she has when entering chamber 2 what reduces the risk of disruptive cold air flows. The Cooling wall 1 through the cooling air on a relatively low temperature is maintained also supports the cooling effect Exchange of radiation with the room to be cooled. Because of the is a small proportion of free cross section effectiveness in this regard is practically undiminished.

Die Kühlwirkung beruht also auf drei Mechanismen, nämlich der Einleitung kälterer Luft in den zu kühlenden Raum durch die Mikrolöcher in der Kühlwand 1, Konvektion an derselben und Wärmeleitung durch sie hindurch sowie Strahlungsaustausch ihrer gegen den Raum weisenden Oberfläche mit Objekten in demselben.The cooling effect is based on three mechanisms, namely the introduction of colder air into the room to be cooled the micro holes in the cooling wall 1, convection on the same and heat conduction through them as well Radiation exchange of those pointing towards the room Surface with objects in it.

Es sind natürlich zahlreiche Abwandlungen der beschriebenen Ausführung sowohl des einzelnen Luftkühlelements als auch der Luftkühlanordnung möglich. So können die Luftkühlelemente etwa länglich ausgeführt sein und zwei oder mehr Verteilerstutzen aufweisen. Zwischen aufeinanderfolgenden Luftkühlelementen einer Luftkühlanordnung können zur Aufnahme einer Abluftöffnung oder eines Beleuchtungskörpers grössere Abstände vorgesehen sein, die durch an den Enden wie die Verbindungsstutzen 40 ausgebildete längere Verbindungsrohre überbrückt sind.There are of course numerous modifications to those described Execution of both the individual air cooling element as well the air cooling arrangement possible. So they can Air cooling elements can be made approximately elongated and two or have more manifolds. Between successive air cooling elements one Air cooling arrangement can accommodate an exhaust vent or a lighting fixture provided larger distances be through at the ends like the connecting piece 40 trained longer connecting pipes are bridged.

Ein in seinem grundsätzlichen Aufbau und seiner Funktionsweise im wesentlichen gleiches, aber im einzelnen etwas anders ausgebildetes erfindungsgemässes Luftkühlelement gemäss einer zweiten Ausführungsform, das sich auch durch niedrige Produktionskosten auszeichnet, ist schematisch in Fig. 7a,b dargestellt. Die Kammer 2 ist ebenfalls nach unten durch eine Kühlwand 1 begrenzt, die wie im Zusammenhang der ersten Ausführungsform geschildert ausgebildet ist. Insbesondere ist sie Teil einer Wanne 11 mit einer hochgezogenen umlaufenden Seitenwand 12. Nach oben und seitlich ist sie durch ein Gehäuse 43 begrenzt mit einer Deckwand 8, welche einen ebenen mittleren Abschnitt aufweist, der beidseits in schräg abfallende Abschnitte übergeht, an welche senkrechte Seitenwände 7 anschliessen sowie mit Frontwanden 6, die mit Verbindungsöffnungen 10 versehen sind. Zwischen den unteren Rändern der Frontwände 6 und der Seitenwände 7 einerseits und dem Rand der Kühlwand 1 andererseits ist ein umlaufender Dichtungsstreifen 44 aus Moosgummi geklemmt.One in its basic structure and its Operation essentially the same, but in detail something differently designed according to the invention Air cooling element according to a second embodiment, the is also characterized by low production costs schematically shown in Fig. 7a, b. Chamber 2 is also limited at the bottom by a cooling wall 1, which like described in connection with the first embodiment is trained. In particular, it is part of a tub 11 with a raised peripheral side wall 12. Up and laterally it is delimited by a housing 43 Cover wall 8, which has a flat central section has on both sides in sloping sections passes to which vertical side walls 7 connect as well as with front walls 6, which with connection openings 10 are provided. Between the lower edges of the front walls 6 and the side walls 7 on the one hand and the edge of the cooling wall 1 on the other hand, a circumferential sealing strip 44 is made Foam rubber clamped.

Die Trennwand 3, welche die Vorkammer 4 von der Kammer 2 trennt, ist (Fig. 8a,b) als Rohrabschnitt von rundem Querschnitt ausgebildet, der beidseits an die Verbindungsöffnungen 10 in den Frontwänden 6 anschliesst. Der Lufteinlass 5 der Kammer 2 wird durch eine Vielzahl von unmittelbar in der Trennwand 3 angebrachten, nämlich von innen gestanzten Durchtrittsöffnungen gebildet, die im unteren, gegen die Kühlwand 1 weisenden Bereich derselben in fünf Reihen 45a,b,c,d,e, die jeweils Winkellagen von 0°, ±30° und ±60° zur Senkrechten einnehmen, angeordnet sind. In den einzelnen Reihen folgen die Durchtrittsöffnungen in Abständen von z. B. 4,5 mm aufeinander. Ihr Durchmesser beträgt z. B. jeweils 1,2 mm. Die durchtretende Luft wird, zumal die Durchtrittsöffnungen von der Kuhlwand 1 beabstandet sind - im Beispiel beträgt der Abstand der untersten Reihe 45c ca. 3,4 cm -, in der Kammer 2 ausreichend verwirbelt, so dass keine geschlossen gegen die Kühlwand 1 gerichteten Luftströmungen entstehen, die auch unterhalb derselben noch spürbar sein könnten. The partition 3, which separates the antechamber 4 from the chamber 2 separates, is (Fig. 8a, b) as a tubular section of round Cross section formed on both sides of the Connects openings 10 in the front walls 6. The air inlet 5 of the chamber 2 is through a variety of attached directly in the partition 3, namely from punched through openings formed in the lower, facing the cooling wall 1 area thereof in five rows 45a, b, c, d, e, each with angular positions of 0 °, Occupy ± 30 ° and ± 60 ° to the vertical. In the individual openings are followed by the openings in Intervals of z. B. 4.5 mm on top of each other. Your diameter is z. B. 1.2 mm each. The air that passes through especially since the openings from Kuhlwand 1 are spaced - in the example, the distance is bottom row 45c approx. 3.4 cm -, in chamber 2 sufficiently swirled so that no closed against the Cooling wall 1 directed air flows arise, too could still be felt below it.

Je nach Anforderungen und Randbedingungen kann auch eine andere Anbringung der Durchtrittsöffnungen am günstigsten sein. So kann z. B. die unterste Reihe 45c fehlen oder die Durchtrittsöffnungen können an der Oberseite der Trennwand 3 konzentriert sein. Möglich ist auch die Anbringung von Verteilerstutzen, wie sie beim Luftkühlelement gemäss der ersten Ausführungsform beschrieben wurden, oder von entsprechenden Profilen an der Unterseite der Trennwand 3.Depending on the requirements and boundary conditions, a other installation of the passage openings cheapest his. So z. B. the bottom row 45c is missing or Through openings can be on the top of the partition 3 to be focused. It is also possible to attach Manifold, as in the air cooling element according to the first embodiment, or from corresponding profiles on the underside of the partition 3.

Die Aufhängung der Luftkühlelemente erfolgt (Fig. 9) in ähnlicher Weise wie im Zusammenhang mit der ersten Ausbildungsform geschildert. Die Luftkühlelemente bilden Luftkühlanordnungen aus nebeneinander angeordneten Reihen, wobei eine Reihe jeweils auf zwei Schienen 31a,b aufgeschoben ist, die an in Längsrichtung mit Abstand aufeinanderfolgenden Querbalken 46 befestigt sind. Die Schienen 31a,b weisen gegeneinander gerichtete, mit Abstand unterhalb der Querbalken 46 durchlaufende waagrechte Stege 47 mit nach oben weisenden Auflagestreifen 33 auf, auf denen kurze waagrechte Halteplatten 48 des Gehäuses 43 abgestützt sind, die beidseits, jeweils anschliessend an die Frontplatten 6, knapp ausserhalb der Innenränder der schräg abfallenden Abschnitte an der Deckwand 8 befestigt sind. Mittig ist beidseits, etwas tiefer liegend als die Halteplatten 48, jeweils eine Anschlagplatte 49 am schräg abfallenden Abschnitt befestigt, die knapp unter der Unterseite des Steges 47 liegt und die Beweglichkeit des Gehäuses 43 nach oben begrenzt, so dass dessen Höhenlage mit enger Toleranz festgelegt ist.The air cooling elements are suspended in (Fig. 9) similar to the first one Form of training described. Form the air cooling elements Air cooling arrangements of rows arranged side by side, one row each on two rails 31a, b is slid on in the longitudinal direction at a distance successive crossbar 46 are attached. The Rails 31a, b face each other at a distance horizontal bars running underneath the crossbars 46 47 with upwardly facing support strips 33 on which short horizontal holding plates 48 of the housing 43 are supported are on both sides, each following the Front panels 6, just outside the inner edges of the oblique sloping sections are attached to the top wall 8. The middle is on both sides, slightly lower than that Holding plates 48, each with a stop plate 49 at an angle sloping section attached just below the Bottom of the web 47 is located and the mobility of the Housing 43 limited upwards, so that its height with close tolerance is set.

Die Kühlwand 1 ist separat, unabhängig vom Gehäuse 43 gehaltert. Dazu sind jeweils beidseits des Luftkühlelements Klemmschienen 50 angeordnet, welche mittels Bändern 51 ebenfalls an den Querbalken 46 aufgehängt sind. Die Klemmschiene 50 umfasst jeweils ein Schwert 52, das zwischen zwei nebeneinander angeordneten Reihen von Luftkühlelementen liegt, derart, dass beidseits jeweils die Aussenseite der Seitenwand 12 der Wanne 11 an dasselbe anstösst. Mittels eines Federstreifens 53, welcher mit einer zurückgebogenen unteren Endpartie jeweils unter Haltenocken 54 an der Innenseite der besagten Seitenwand 12 greift und dieselbe gegen das Schwert 52 drückt, wird jeweils ein Rand der Wanne 11 fixiert.The cooling wall 1 is separate, independent of the housing 43 supported. For this purpose, there are two sides of the air cooling element Clamping rails 50 arranged, which by means of tapes 51st are also suspended from the crossbar 46. The Clamping rail 50 each includes a sword 52 that between two rows of air cooling elements arranged side by side lies in such a way that the outside of the Side wall 12 of the tub 11 abuts the same. through a spring strip 53, which with a bent back lower end section in each case under retaining cams 54 on the The inside of said side wall 12 engages and the same presses against the sword 52, one edge of the tub 11 fixed.

Die Verbindung zwischen den Vorkammern 4 zweier aufeinanderfolgender Luftkühleimente einer Reihe wird (Fig. 10) wiederum jeweils durch einen Verbindungsnippel 40 hergestellt, dessen Aussendurchmesser etwas kleiner ist als der Innendurchmesser der Verbindungsöffnungen 10 und der Vorkammern 4. Er weist zur Erleichterung seiner Positionierung mittig einen zwischen den Luftkühlelementen 24a,b liegenden umlaufenden Wulst 41 auf. Beidseits desselben ist er mit je zwei an der Aussenseite mit Abstand aufeinanderfolgend umlaufenden, als Lippendichtungen ausgebildeten Dichtungsringen 15 versehen, die gegen die Innenseite der Trennwand 3 gepresst sind.The connection between the antechambers 4 two successive air cooling portions of a series (Fig. 10) in turn by a connecting nipple 40 manufactured, whose outer diameter is slightly smaller than the inner diameter of the connection openings 10 and Antechambers 4. He points to his Position one in the middle between the air cooling elements 24a, b lie on circumferential bead 41. both sides the same is spaced apart with two on the outside successively revolving, as lip seals trained sealing rings 15 provided against the Are pressed inside the partition 3.

Die Gehäuse 43 der Luftkühlelemente können jeweils nacheinander auf die Schienen 31a,b aufgeschoben werden, wobei jeweils vorgängig ein Verbindungsnippel 40 in die hintere Verbindungsöffnung 10 eingesteckt wird, dessen vorstehende Hälfte sich in die vordere Verbindungsöffnung 10 des anschliessend aufgeschobenen Gehäuses schiebt, so dass sich die Verbindung von selbst herstellt. Beim ersten Gehäuse einer Reihe ist in die vordere Verbindungsöffnung 10 ein Deckel ähnlicher Bauart eingeschoben, der sie dicht verschliesst. Das letzte Gehäuse wird mittels eines ebenfalls ähnlich ausgebildeten trichterartigen Anschlussnippels an eine Luftzuleitung angeschlossen. The housing 43 of the air cooling elements can each are successively slid onto the rails 31a, b, each with a connecting nipple 40 previously in the rear connection opening 10 is inserted, the protruding half into the front connection opening 10 of the housing then pushed open so that the connection establishes itself. At the first Housing of a row is in the front connection opening 10 a lid of a similar design is inserted, which makes it tight closes. The last housing is by means of a similarly funnel-shaped Connection nipple connected to an air supply line.

Anschliessend wird unter jedem Gehäuse 43 die zugehörige Wanne 11 befestigt, indem deren Seitenwände 12 jeweils zwischen das Schwert 52 und den Federstreifen 53 geschoben werden, bis der letztere die Haltenocken 54 untergreift. Dabei wird der Dichtungsstreifen 44 zwischen dem Gehäuse 43 und der Kühlwand 1 geklemmt und die Kammer 2 - abgesehen von den Mikrolöchern in der Kühlwand 1 und dem Lufteinlass 5 - luftdicht verschlossen.Then the associated one under each housing 43 Tub 11 attached by the side walls 12 each slid between the sword 52 and the spring strips 53 until the latter engages under the holding cams 54. The sealing strip 44 is between the housing 43 and the cooling wall 1 clamped and the chamber 2 - apart from the micro holes in the cooling wall 1 and the air inlet 5 - hermetically sealed.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Kühlwandcooling wall
22
Kammerchamber
33
Trennwandpartition wall
44
Vorkammerantechamber
55
Lufteinlassair intake
66
Frontwandfront wall
77
SeitenwandSide wall
88th
Deckwandtop wall
99
Ausnehmungrecess
1010
Verbindungsöffnungconnecting opening
1111
Wannetub
1212
SeitenwandSide wall
1313
Schlitzslot
1414
Schraubenbolzenbolt
1515
Dichtungsringsealing ring
1616
HalteplatteRetaining plate
1717
Verteilerstutzenmanifolds sockets
1818
Deckelcover
1919
Befestigungsflanschmounting flange
2020
Mantelcoat
2121
Bodenground
2222
Durchlasspassage
2323
LuftkühlanordnungAir cooling arrangement
24a,b,c,d24a, b, c, d
LuftkühlelementeAir cooling elements
2525
Winkel angle
2626
Flanschflange
2727
Streifenstrip
2828
Zwischenraumgap
2929
Lascheflap
3030
Ausnehmungrecess
31a,b31a, b
Schienenrails
3232
Schraubenbolzenbolt
3333
Auflagestreifensupporting strip
3434
Haltenockenholding cams
3535
BasisBase
3636
Auflagezapfensupport pins
3737
Lascheflap
3838
Fortsatzextension
3939
Kanalchannel
4040
Verbindungsnippelconnecting nipple
4141
Wulstbead
4242
Anschlussstutzenspigot
4343
Gehäusecasing
4444
Dichtungsstreifenweatherstrip
45a,b,c,d,e45a, b, c, d, e
Reihen von DurchtrittsöffnungenRows of openings
4646
Querbalkencrossbeam
4747
Stegweb
4848
HalteplatteRetaining plate
4949
Anschlagplattestop plate
5050
Klemmschieneclamping rail
5151
Bandtape
5252
Schwertsword
5353
Federstreifenspring strips
5454
Haltenockenholding cams

Claims (25)

  1. Air-cooling element comprising a chamber (2) which has at least one air inlet (5) and is bounded on one side by a cooling wall (1) and besides is closed essentially air-tight, characterized in that the cooling wall (1) has micro-holes distributed over its area and each having a diameter of not more than 0.8 mm and is otherwise air-impermeable, so that its free cross-section is not more than 2%, preferably not more than 1%, of the area of the cooling wall (1).
  2. Air-cooling element according to Claim 1, characterized in that the micro-holes are arranged in a regular grid.
  3. Air-cooling element according to Claim 1 or 2, characterized in that the micro-holes are round and each have a diameter of not more than 0.6 mm.
  4. Air-cooling element according to any of Claims 1 to 3, characterized in that the cooling wall (1) has a heat transfer coefficient of at least 40 W/m2K.
  5. Air-cooling element according to Claim 4, characterized in that the cooling wall (1) consists of sheet-metal whose thickness is not greater than 1 mm.
  6. Air-cooling element according to Claim 5, characterized in that the sheet metal is steel sheet.
  7. Air-cooling element according to any of Claims 1 to 6, characterized in that the chamber (2) and the air inlet (5) are designed in such a way that the heat transfer coefficient on the inside of the air-permeable wall, with the supply of a nominal air flow rate of at least 45 m/h is at least 50 W/m2K, preferably at least 80 W/m2K.
  8. Air-cooling element according to any of Claims 1 to 7, characterized in that it comprises an antechamber (4) which has at least one air connection, is connected to the chamber (2) via its at least one air inlet (5) and is otherwise closed essentially air-tight.
  9. Air-cooling element according to Claim 8, characterized in that the at least one air inlet (5) is suitable for producing turbulence in an air flow from the antechamber (4) into the chamber (2).
  10. Air-cooling element according to Claim 8 or 9, characterized in that the air inlet (5) comprises a plurality of passages which open into the chamber (2).
  11. Air-cooling element according to Claim 10, characterized in that the passages each have a diameter of not more than 1.5 mm.
  12. Air-cooling element according to Claim 10 or 11, characterized in that at least the majority of the passages is not more than 10 cm away from the cooling wall (1).
  13. Air-cooling element according to Claim 8 or 12, characterized in that the antechamber (4) is separated from the chamber (2) by a partition (3).
  14. Air-cooling element according to Claim 10 or 12, characterized in that the passages are provided directly in the partition (3).
  15. Air-cooling element according to Claim 13 or 14, characterized in that the partition (3) is in the form of at least one tubular section which projects through the chamber (2).
  16. Air-cooling element according to any of Claims 10 to 13, characterized in that the at least one air inlet (5) comprises a distributor nozzle (17) which projects into the chamber (2) and in which the passages are arranged exclusively laterally, not directed towards the cooling wall (1).
  17. Air-cooling element according to any of Claims 1 to 16, characterized in that it has, on the side opposite the cooling wall (1), laterally protruding retaining projections forming a downward-pointing stop.
  18. Process for operating an air-cooling element according to any of Claims 1 to 17, characterized in that the air flow is highly turbulent on the inside of the cooling wall (1) and the heat transfer coefficient there is at least 50 W/m2K, preferably at least 80 W/m2K.
  19. Process for operating an air-cooling element according to any of Claims 8 to 17, characterized in that the pressure drop between the antechamber (4) and the chamber (2) is at least three times the pressure drop across the cooling wall (1).
  20. Air-cooling arrangement comprising at least one row of air-cooling elements (24a, 24b, 24c, 24d) according to any of Claims 8 to 17, characterized in that the antechamber (4) of an outermost air-cooling element (24d) is connected to an air supply line while the antechamber (4) of each further air-cooling element (24c, 24b, 24a) is associated in each case with the antechamber (4) of the preceding air-cooling element (24d; 24c; 24b) via an essentially air-tight connection.
  21. Air-cooling arrangement according to Claim 20, characterized in that the connection between two successive air-cooling elements (24a, 24b, 24c, 24d) is produced in each case by virtue of the fact that a connecting piece projects into the connecting orifices (10) of the successive air-cooling elements (24a, 24b, 24c, 24d) at least one sealing ring being clamped against the connecting piece in each case.
  22. Air-cooling arrangement comprising at least one air-cooling element (24a, 24b, 24c, 24d) according to any of Claims 1 to 17, characterized in that it comprises at least one rail arrangement from which at least one part of the at least one air-cooling element (24a, 24b, 24c, 24d) is displaceably suspended.
  23. Air-cooling arrangement according to Claim 22, comprising at least one air-cooling element (24a, 24b, 24c, 24d) according to Claim 17, characterized in that the retaining projections rest on support strips (33) of the rail arrangement.
  24. Air-cooling arrangement according to Claim 22 or 23, characterized in that the cooling wall (1) of the at least one air-cooling element is separately suspended.
  25. Air-cooling arrangement according to Claim 24, characterized in that the rail arrangement comprises at least two clamping rails (50), against each of which an angled edge strip adjacent to the cooling wall (1) is clamped.
EP00904781A 1999-03-03 2000-02-25 Air cooling element, method for operating the same, and an air cooling arrangement Expired - Lifetime EP1078205B1 (en)

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CH38899 1999-03-03
PCT/CH2000/000104 WO2000052395A1 (en) 1999-03-03 2000-02-25 Air cooling element, method for operating the same, and an air cooling arrangement

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EP (1) EP1078205B1 (en)
JP (1) JP3663132B2 (en)
AT (1) ATE253714T1 (en)
AU (1) AU770154B2 (en)
CA (1) CA2330787A1 (en)
DE (1) DE50004305D1 (en)
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JP2002538408A (en) 2002-11-12
AU770154B2 (en) 2004-02-12
ATE253714T1 (en) 2003-11-15
EP1078205A1 (en) 2001-02-28
CA2330787A1 (en) 2000-09-08
DE50004305D1 (en) 2003-12-11
US6602129B1 (en) 2003-08-05
DK1078205T3 (en) 2004-02-23
WO2000052395A1 (en) 2000-09-08
ES2209816T3 (en) 2004-07-01
JP3663132B2 (en) 2005-06-22
PT1078205E (en) 2004-02-27
AU2655500A (en) 2000-09-21

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