EP0787954A2 - Dispositif d'entrée d'air - Google Patents

Dispositif d'entrée d'air Download PDF

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Publication number
EP0787954A2
EP0787954A2 EP96810910A EP96810910A EP0787954A2 EP 0787954 A2 EP0787954 A2 EP 0787954A2 EP 96810910 A EP96810910 A EP 96810910A EP 96810910 A EP96810910 A EP 96810910A EP 0787954 A2 EP0787954 A2 EP 0787954A2
Authority
EP
European Patent Office
Prior art keywords
outlet
wall
outlet channels
channels
outlet wall
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.)
Granted
Application number
EP96810910A
Other languages
German (de)
English (en)
Other versions
EP0787954B1 (fr
EP0787954A3 (fr
Inventor
Gregory Dr. Ing. Gottschalk
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.)
HESCO (SCHWEIZ) AG
Original Assignee
Hesco Pilgersteg 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
Application filed by Hesco Pilgersteg AG filed Critical Hesco Pilgersteg AG
Publication of EP0787954A2 publication Critical patent/EP0787954A2/fr
Publication of EP0787954A3 publication Critical patent/EP0787954A3/fr
Application granted granted Critical
Publication of EP0787954B1 publication Critical patent/EP0787954B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
    • F24F13/068—Outlets 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 a device for introducing air into a room to be ventilated or to be air-conditioned, with numerous outlet channels arranged adjacent to one another in an outlet wall of a device housing, for generating a low-turbulence outflow, the length of the outlet channels being greater than their largest transverse dimension.
  • Devices of the type mentioned have the advantage that the air flows out of the outlet wall with a speed gradient that changes only slightly over the outlet surface, so that the air penetrates into the space like a piston.
  • a device of the type mentioned at the outset is designed for the outflow in the floor area of a room to be ventilated.
  • it has an outlet wall provided on the side of its device housing, which is formed by a honeycomb grid arranged between two perforated plates in such a way that each outlet channel or honeycomb is delimited at its inner and outer end by a hole in the adjacent perforated plate and the hole cross section is smaller than the cross section of the respective outlet duct.
  • the outlet channels or honeycombs In order to compensate for the influence of the gravity of the colder air, the outlet channels or honeycombs have a correspondingly obliquely upward course.
  • resulting profile of the total flow is determined for a given amount of the total flow with a certain low temperature solely by the shape of the outlet wall extending into the room to be ventilated and the uniform orientation of its numerous outlet channels. For a flow profile that is sufficiently distributed in the room, it was considered necessary to allow the device to protrude accordingly into the room.
  • the invention is based on the object of finding a device of the type mentioned which enables air to be introduced into a room in an optimally adaptable manner to the particular spatial conditions, so that a flow profile which is particularly advantageous for ventilation can be achieved without the outer shape of the device and their outlet wall must be determined by this task.
  • a different flow rate in the numerous outlet channels is determined in that the outlet channels are graduated in length and / or cross-sectional size.
  • At least some of the outlet channels have a different direction on the flat or curved outlet surface of the outlet wall.
  • a device 1 has a housing 2, which is provided with a connection (not shown) for connection to the supply air duct of a ventilation system or an air conditioning device and with an outlet wall 3 for introducing air into a room to be ventilated or air-conditioned.
  • This housing 2 is for insertion e.g. provided behind the ceiling cladding of a room to be ventilated, so that the outlet wall 3 forms a boundary of the room to be air-conditioned, which, for example, merges flush with the adjacent room wall.
  • the air does not flow into the room like a jet and there leads to strong turbulence with induction of contaminated, heated room air, it is dammed up on the outlet wall 3 and distributed over numerous, relatively small in diameter, honeycomb-like outlet channels 4, in which they are laminar or aligned with low turbulence.
  • the congestion effect and thus targeted distribution of quantities on the outlet cross section of the outlet wall 3 results from the air resistance when flowing through the outlet channels.
  • it can also be influenced by internals, as is shown by the exemplary embodiments in FIGS. 8 to 12, in order to achieve or to reinforce certain forms of the velocity profile of the total flow that results when the flow is emitted.
  • FIGS. 2 and 3 illustrates that a gradation of the outlet speeds at the outlet channels 4 can be achieved instead of a step length by a step diameter or a stepped transverse dimension of the outlet channels 4. It also goes without saying that the measures illustrated by FIGS. 2 and 3 can also be combined with one another.
  • FIGS. 2 and 3 show the flow change only in the direction of the cross-sectional representation.
  • 1 and 6 illustrate examples of graded changes in the direction of the X and Y axes of a coordinate system, so that a bubble-shaped bulge of the flow profile with flattening to the outer regions of the outlet wall 3 is spatially conceivable due to the representation.
  • the annular sector-shaped section of an outlet wall 3 shown in FIG. 7 illustrates an exemplary embodiment of a device according to the invention in which outlet channels 4 with a larger flow cross section are located in an inner annular region and outlet channels 4 with a smaller flow cross-section are provided in an outer annular region.
  • the outlet wall 3 according to FIG. 7 is bulged concentrically or bowl-shaped on its inside along the section line 10, so that the outlet channels 4 of the middle region have a lower flow resistance not only because of their larger cross section but also because of their shorter length and consequently the outflow quantity is significantly larger in the central area and gradually decreases towards the outside and inside. In this way it is effectively prevented that secondary air is induced by the peripheral outflow.
  • a negative pressure is created which causes a return flow of supply air and consequently its circulation.
  • the outlet channels according to FIG. 7 consist, for example, of a layered corrugated material 11 with flat, membrane-like thin walls 12 arranged between them, so that the cross-sectional shape of each of the numerous outlet channels 4 is approximately triangular or trapezoidal.
  • the shape of the outlet channels 4 is thus essentially determined by the manufacturing technique, the technique of material deformation forming numerous possibilities.
  • the honeycomb-type outlet channels 4 should only be separated from one another by a thin wall, so that the overall available opening cross-section is as large as possible for a certain size of the outlet wall 3.
  • a device according to the invention fasten a protective grille 13 in front of the outlet wall 3 in easily accessible areas, as indicated in FIG.
  • a protective grille can form part of the device.
  • the flow around the lamellae of the protective grille is without flow separation, so that the flow pattern arising on the device is not significantly influenced by them.
  • these preferably have a bead 16 which is drop-shaped in cross section and rounded outwards, as the enlarged cross-sectional view of FIG. 7A shows.
  • a bead 16 which is drop-shaped in cross section and rounded outwards, as the enlarged cross-sectional view of FIG. 7A shows.
  • Such rounding of the outlet edge can be made by immersion in a liquid, e.g. Synthetic resin. The teardrop shape results when it is lifted out of the liquid and then hardened.
  • FIGS. 8 to 12 show exemplary embodiments of devices according to the invention in which the amount of air flowing out of the outlet channels 4 is predistributed by internal baffle walls or guide elements 14 to 24 during the inflow to the outlet wall 3, so that if the permeability of the outlet channels 4 is not graded, ie Given their constant opening cross section, they only serve to produce a profiled or non-uniform and, in the process, low-turbulence overall flow at the outlet from the outlet wall 3.
  • the outlet ducts 3 can contribute to a desired type of flow profile of the resulting overall flow by means of different lengths and / or opening widths.
  • two damper and guide flaps 14, 15 are arranged symmetrically to the axis of a rail-shaped supply air duct 25 and can be pivoted about an axis 27, 28 running perpendicular to the direction of flow.
  • the flow profile shown in the lower part of the illustration illustrates the influence of the pivot position of these damper and guide flaps 14, 15 on the shape of the flow profile.
  • the cross-sectional representation of FIG. 9 can relate both to a rail-shaped device, similar to the exemplary embodiment according to FIG. 8, and to a mushroom-shaped device.
  • the outlet channels 4 have a conical shape that widens in the direction of flow.
  • a pre-distribution of the Air takes place by means of a diffuser 17, the angle of propagation of which is more than 5 o .
  • a perforated dam wall 26, which is partially flowed around and partially flowed through, is arranged centrally and at a distance from the inside of the outlet wall 3.
  • FIG. 10 shows an embodiment with an annular nozzle 18, 19, 20 arranged in a cylindrical housing 2, so that the outlet wall 3 is acted upon by a speed distribution, as indicated by the profile line 30.
  • the difference between the profile lines 30, 31 in front of and behind the outlet wall 3 illustrates the rectifying or turbulence-reducing effect of the outlet wall 3.
  • perforated baffle walls 21 to 23 and 24 are provided for the air distribution to the outlet wall 3 at a distance from the latter. According to FIG. 11, these can be staggered in a row and have larger interruptions 32. 12 shows an embodiment in which the central region of the perforated dam wall 24 is more permeable through a larger number of perforation holes 33, so that a larger proportion of the air flowing through the housing channel 2 is fed to the central region of the outlet wall 3 and the outflow the device with a flow profile indicated by the line 34.
  • FIGS. 10 and 12 can also relate to a device designed as a linear outlet instead of a circular cylindrical device, so that it serves to generate an air curtain, e.g. in order to create a thermal boundary in openly accessible cooling shelves of sales systems. Since a mixture with ambient air is low, an effective air curtain is obtained even with a smaller air throughput.
  • FIG. 11 also shows schematically a particularly simple design Device in which the outlet wall 3 is composed of customary honeycomb material, ie with the same and parallel outlet channels 4. Due to the modular design of the outlet wall 3, however, the outflow directions are graduated, so that the overall flow has a specifically non-uniform profile, similar to that due to the embodiment according to FIG. 7.
  • a control element 37 of this device 36 effects the periodic reversal of the supply air to one of several devices 1 connected to the common inflow duct 38 or 39.
  • the timing of these reversals can be adapted by suitable control to the individual needs of the people staying in it and other room loads .
  • outlet wall 3 has a central inner region 36, delimited by a circumferential wall 35, with outlet ducts 4 parallel to one another and to the central axis, while the outer region 37 surrounding this region 36 has outlet ducts 4 with an outward-directed one Changes direction, so that the air flow in the outlet channels is deflected from a direction parallel to the central axis of the outlet wall 3 to an outward direction.
  • FIG. 17 shows, in an enlarged partial cross section, an outer region 37, in which several individual examples have been schematically combined to illustrate different embodiments of outlet ducts 3 with a change in direction.
  • outlet channels 3 In a concrete embodiment, only one embodiment of outlet channels 3 would be provided in a compact arrangement next to one another in the outer region 37.
  • An arcuate change in direction of the outlet channels 4 is fluidic preferable, but for reasons of simpler manufacture, angled outlet channels 4 can also be provided.
  • the outlet ducts in the outer region 37 can also extend in a straight line, for example with a gradual widening of the cross section, and the direction angle of different outlet ducts 4 can also vary from the outside.
  • FIG. 18 shows from a sector-shaped detail representation of an outlet wall 3 that the cross-sectional shape of outlet channels arranged in annular groups can also be different, determined by manufacturing techniques and in order to achieve special aesthetic effects which can be particularly advantageous for devices of this type.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Duct Arrangements (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Air-Flow Control Members (AREA)
EP96810910A 1996-01-30 1996-12-30 Dispositif de sortie d'air Expired - Lifetime EP0787954B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH235/96 1996-01-30
CH23596 1996-01-30
CH23596 1996-01-30

Publications (3)

Publication Number Publication Date
EP0787954A2 true EP0787954A2 (fr) 1997-08-06
EP0787954A3 EP0787954A3 (fr) 1998-03-18
EP0787954B1 EP0787954B1 (fr) 2000-05-24

Family

ID=4182374

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96810910A Expired - Lifetime EP0787954B1 (fr) 1996-01-30 1996-12-30 Dispositif de sortie d'air

Country Status (5)

Country Link
EP (1) EP0787954B1 (fr)
AT (1) ATE193369T1 (fr)
DE (1) DE59605301D1 (fr)
ES (1) ES2152508T3 (fr)
NO (1) NO310792B1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005017419A1 (fr) 2003-08-13 2005-02-24 Airson Ab Dispositif d'alimentation en air
WO2006004535A1 (fr) * 2004-07-05 2006-01-12 Camfil Ab Filtre a air
EP3784960A2 (fr) * 2018-04-24 2021-03-03 Tiny Wolf IVS Tête de diffuseur et appareil de nettoyage d'air la comprenant

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0563509A2 (fr) 1992-03-28 1993-10-06 H.KRANTZ - TKT Gesellschaft mit beschränkter Haftung Sortie d'air pour installation de traitement d'air

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2608792A1 (de) * 1976-03-03 1977-09-08 Josef Piederstorfer Mehrfachduese zur erzeugung radialer verdraengungsstroemungen
IN152016B (fr) * 1980-11-24 1983-09-24 Klenzaids Engineers Plc

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0563509A2 (fr) 1992-03-28 1993-10-06 H.KRANTZ - TKT Gesellschaft mit beschränkter Haftung Sortie d'air pour installation de traitement d'air

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005017419A1 (fr) 2003-08-13 2005-02-24 Airson Ab Dispositif d'alimentation en air
WO2006004535A1 (fr) * 2004-07-05 2006-01-12 Camfil Ab Filtre a air
EP3784960A2 (fr) * 2018-04-24 2021-03-03 Tiny Wolf IVS Tête de diffuseur et appareil de nettoyage d'air la comprenant

Also Published As

Publication number Publication date
NO965577D0 (no) 1996-12-27
NO310792B1 (no) 2001-08-27
EP0787954B1 (fr) 2000-05-24
NO965577L (no) 1997-07-31
DE59605301D1 (de) 2000-06-29
EP0787954A3 (fr) 1998-03-18
ATE193369T1 (de) 2000-06-15
ES2152508T3 (es) 2001-02-01

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