EP0354949B1 - Luftdiffusionseinheit - Google Patents

Luftdiffusionseinheit Download PDF

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Publication number
EP0354949B1
EP0354949B1 EP89902262A EP89902262A EP0354949B1 EP 0354949 B1 EP0354949 B1 EP 0354949B1 EP 89902262 A EP89902262 A EP 89902262A EP 89902262 A EP89902262 A EP 89902262A EP 0354949 B1 EP0354949 B1 EP 0354949B1
Authority
EP
European Patent Office
Prior art keywords
air
sound absorption
chamber
distribution unit
flow
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
EP89902262A
Other languages
English (en)
French (fr)
Other versions
EP0354949A1 (de
Inventor
Teuvo Pellinen
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.)
Halton Oy
Original Assignee
Halton Oy
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 Halton Oy filed Critical Halton Oy
Priority to AT89902262T priority Critical patent/ATE90787T1/de
Publication of EP0354949A1 publication Critical patent/EP0354949A1/de
Application granted granted Critical
Publication of EP0354949B1 publication Critical patent/EP0354949B1/de
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
    • 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
    • F24F13/24—Means for preventing or suppressing noise

Definitions

  • the present invention concerns an air distribution unit.
  • DK 85412 discloses an air distribution unit in which air flows through a sound absorption chamber having a sound absorption plate and in which the air flow changes its flow direction through at !east 90° on entering an outlet chamber.
  • FI 73068 shows a terminal device for incoming air comprising an air inlet duct and an air outlet duct.
  • the air meets an oblique sound absorption surface in the inlet air means.
  • a useless space remains in the area behind the oblique sound absorption surface.
  • the sound absorption capacity is not as good as it could be.
  • the object of the present invention is to further improve the air distribution unit.
  • the invention provides an air distribution unit comprising an external envelope, an air inlet duct for delivering air into the sound absorption chamber having an obliquely positioned sound absorption surface, and an air outlet chamber for receiving air from the sound absorption chamber and delivering air to an air outlet duct, wherein the sound absorption chamber through which the air flow tapers in cross-section and wherein the air changes its flow direction through at least 90° when flowing from one chamber into the other, characterised in that the air outlet chamber has an air discharge surface across which the air will flow and through which the air will flow towards a room space, the outlet chamber decreasing in cross-section in the direction of the air flow across the air discharge surface. In this manner the useless space of FI 73068 may be put to use.
  • the air distribution unit serves as an air terminal unit through which air can be made to flow into an interior space.
  • the air distribution unit comprises a sound absorption surface positioned obliquely relative to the direction of the incoming air, which may be formed of sound absorption board material. Where the air flow enters the air outlet chamber, it changes direction by at least 90°, preferably substantially more than 90°, and at the maximum, 180°.
  • the air flows into the rear part of the outlet chamber, which is located below the obliquely positioned sound absorption plate.
  • a perforated plate or any equivalent air discharge surface may be used, whereby the supply of air into the interior space can be regulated as desired.
  • the apparatus of the invention enables completely silent air supply to spaces where there are people.
  • Figure 1 is an axonometric perspective partially sectioned drawing of an air distribution unit according to the invention.
  • Figure 2 shows the air distribution unit of Figure 1, in cross-section along the line I-I in Figure 1.
  • the air distribution unit 10 comprises an outer envelope 11.
  • the air enters a sound absorption chamber 13 through an air duct, as shown by arrow L1.
  • the underside of the sound absorption chamber 13 is confined by a planar, plate-like sound absorption plate 14 which comprises sound absorption material.
  • the sound absorption plate 14 is positioned obliquely with respect to the air entry direction (direction of the x-axis).
  • the air flows through a space 13, which tapers in cross-section I-I, and discharges into an outlet chamber 15 through the gap between the oblique sound absorption plate 14 and a sound absorbing material layer 16 covering the inner surface of the outer envelope 11.
  • the air changes direction (arrows L3) on arriving in the outlet chamber 15, the change of direction being at least 90°, preferably substantially more than 90', and at the maximum, 180°.
  • the outlet duct 17 comprises a perforated plate, louvre or other equivalent air discharge surface.
  • the air flows parallel to the central axis x of the air inlet duct 12 into the sound absorption chamber 13, where it meets the sound absorption plate 14 positioned obliquely with respect to the air flow direction.
  • the air continues as indicated by arrows L2 in the sound absorption chamber 13 which tapers in cross-section I-I.
  • the air flows from the sound absorption chamber 13 into the outlet chamber 15 through the gap between the end margin 14' of the sound absorption plate 14 and the sound absorption layer 16 on the outer envelope 11.
  • the air discharges from the part 15b of the outlet chamber below the sound absorption plate 14, through the outlet duct 17 into the interior space or equivalent.
  • the air flow direction changes through at least 90° with respect to the incoming air direction (arrow L1, x-axis direction), preferably substantially more than 90°.
  • the change of direction of the air flow is shown by arrows L3.
  • the air distribution unit 10 may also comprise a damper for regulating the air flow.
  • This air flow regulating damper may be placed for example in the inlet duct 12.
  • the inlet duct 12 can be located in a wall of the sound absorption chamber 13 other than the end wall shown in Figures. Control of the air flow invariably produces noise, and the sound absorption chamber of the Figures efficiently damps the sound both from the regulator and from the duct system.
  • the sound absorption chamber 13 smooths out the air flow entering the unit, which may be turbulent, and therefore the flow L4 leaving the unit is controlled at all times. Consequently, the flow entering the sound absorption chamber 13 has no influence on the flow L4.
  • a pressure pick-up or connector 18 is placed in the sound absorption chamber 13 communicating with a pressure measuring instrument. Pressure measurement further enables the air flow rate to be calculated. Pressure measurement is possible because of the efficient smoothing of the air flow in the sound absorption chamber.
  • the inlet duct 12 may be located on any one of the walls of the sound absorption chamber, and the pressure in the sound absorption chamber 13 is reliably measurable independently thereof.
  • the air distribution unit of the invention may advantageously be used as an incoming air unit, or as a terminal member for incoming air.
  • the apparatus may be mounted on the ceiling of a room, and the apparatus may be employed to distribute air without causing any significant draughts.
  • the air On entering the part of the outlet chamber below the sound absorption plate, the air discharges through a perforated plate or other equivalent discharge surface into the interior space. Silent and draught free supply of fresh air to occupied spaces can be achieved using the means of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Duct Arrangements (AREA)

Claims (6)

  1. Eine Luftverteilungseinheit (10) mit einer äußeren Ummantelung (11), einer Lufteinlaßleitung (12), um Luft in eine Schallabsorptionskammer (13) zu führen, die eine schräg angeordnete Schallabsorptionsfläche (14) aufweist, und einer Auslaßkammer (15), um von der Schallabsorptionskammer (13) kommende Luft aufzunehmen und die Luft einer Luftauslaßleitung (17) zuzuführen, bei der die Schallabsorptionskammer (13), durch die die Luft strömt, in ihrem Querschnitt (I-I) schräg zuläuft, und bei der die Luft ihre Strömungsrichtung um mindestens 90° ändert, wenn sie von einer Kammer in die andere strömt, dadurch gekennzeichnet, daß die Luftauslaßkammer (15) eine Luftauslaßfläche (17') aufweist, über die die Luft strömt und durch die die Luft in Richtung eines Raums strömt, und daß die Auslaßkammer (15) in ihrem Querschnitt in Richtung der Luftströmung über die Luftauslaßfläche (17') abnimmt.
  2. Die Luftverteilungseinheit (10) nach Anspruch 1, bei der die Schallabsorptionsfläche (14) eine Schallabsorptionsplatte (14) aufweist.
  3. Die Luftverteilungseinheit nach Anspruch 1 oder 2, bei der sich die Schallabsorptionsfläche (14) zwischen der Schallabsorptionskammer (13) und der Luftauslaßkammer (15) befindet, um die Kammern zu trennen.
  4. Die Luftverteilungseinheit (10) nach Anspruch 3, bei der die Schallabsorptionsplatte der Luftauslaßfläche (17') der Luftverteilungseinheit (10) gegenüberliegend angeordnet ist.
  5. Die Luftverteilungseinheit nach einem der voranstehenden Ansprüche, bei der die Luftverteilungseinheit (10) einen Druckaufnehmer innerhalb der Schallabsorptionskammer (13) oder einen Verbinder (18) aufweist, der mit einem Druckmeßgerät kommuniziert, wodurch der Druchsatz des Luftstroms, der die Einheit durchströmt, durch die Druckmessung weiter bestimmt werden kann.
  6. Luftverteilungseinheit nach einem der voranstehenden Ansprüche, bei der der Richtungswechsel des Luftstroms 90° wesentlich übersteigt.
EP89902262A 1988-02-19 1989-02-13 Luftdiffusionseinheit Expired - Lifetime EP0354949B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89902262T ATE90787T1 (de) 1988-02-19 1989-02-13 Luftdiffusionseinheit.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI880799 1988-02-19
FI880799A FI880799A (fi) 1988-02-19 1988-02-19 Luftfoerdelningsenhet.

Publications (2)

Publication Number Publication Date
EP0354949A1 EP0354949A1 (de) 1990-02-21
EP0354949B1 true EP0354949B1 (de) 1993-06-16

Family

ID=8525959

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89902262A Expired - Lifetime EP0354949B1 (de) 1988-02-19 1989-02-13 Luftdiffusionseinheit

Country Status (4)

Country Link
EP (1) EP0354949B1 (de)
DE (1) DE68907148T2 (de)
FI (1) FI880799A (de)
WO (1) WO1989007739A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI90588C (fi) * 1991-03-18 1994-02-25 Valmet Paper Machinery Inc Reaktiivinen äänenvaimennin, etenkin paperitehtaiden ilmakanaviin
GB2361050A (en) * 2000-04-05 2001-10-10 Peter John Bayram Ventilation duct having non-parallel sound absorber splitter plates
PL1589296T3 (pl) * 2004-04-19 2013-12-31 Schako Klima Luft Urządzenie do wtłaczania i/lub usuwania powietrza do/z pomieszczenia
EP2574861A1 (de) * 2011-09-29 2013-04-03 Ingenieurbuero consult+control Dr. -Ing. J. Westhaeusler Luftauslass mit Ventilator

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1071924B (de) *
GB1093256A (en) * 1964-05-19 1967-11-29 Air Systems Ltd Improvements in air conditioning apparatus
DE2804027C2 (de) * 1978-01-31 1982-11-11 Schako Metallwarenfabrik Ferdinand Schad Gmbh, Zweigniederlassung Kolbingen, 7201 Kolbingen Vorrichtung zur Schalldämpfung eines in einer Wand eingebauten Ventilators
US4399739A (en) * 1980-12-16 1983-08-23 Tempmaster Corporation Noise attenuating apparatus for modulating air flow

Also Published As

Publication number Publication date
DE68907148T2 (de) 1993-10-28
WO1989007739A1 (en) 1989-08-24
DE68907148D1 (de) 1993-07-22
FI880799A0 (fi) 1988-02-19
FI880799A (fi) 1989-08-20
EP0354949A1 (de) 1990-02-21

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