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EP0354949A1 - Unite de diffusion d'air. - Google Patents

Unite de diffusion d'air.

Info

Publication number
EP0354949A1
EP0354949A1 EP89902262A EP89902262A EP0354949A1 EP 0354949 A1 EP0354949 A1 EP 0354949A1 EP 89902262 A EP89902262 A EP 89902262A EP 89902262 A EP89902262 A EP 89902262A EP 0354949 A1 EP0354949 A1 EP 0354949A1
Authority
EP
European Patent Office
Prior art keywords
air
sound absorption
chamber
distribution unit
space
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
EP89902262A
Other languages
German (de)
English (en)
Other versions
EP0354949B1 (fr
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/fr
Application granted granted Critical
Publication of EP0354949B1 publication Critical patent/EP0354949B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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 comprising an outer envelope and an air inlet duct and an outlet duct, from the inlet duct the air being arranged to flow into a sound absorption chamber, said sound adsorption chamber comprising a sound absorption surface, advantageously an obliquely positioned sound absorption plate.
  • a terminal device for incoming air comprising an air inlet duct and an air outlet duct.
  • the air is arranged to meet an oblique air absorption surface in the inlet air means.
  • the area behind the oblique air absorption surface remains a useless space in the apparatus design of prior art.
  • the sound absorption capacity of the apparatus design of prior art is not as good as it could be.
  • the object of the invention is to further improve the above apparatus design.
  • An improved apparatus design has in fact been achieved with a sound absorption unit, which is characterized in that the air distribution unit contains an obliquely positioned sound bsorption surface, advantageously a sound absorption plate, such that the air after entering the sound absorption chamber flows in a sound absorption chamber space tapering in cross-section, and flows from the air sound absorption chamber into the air outlet chamber of the air distribution unit and hereat changes flow direction at least 90°, substantially more than 90°. In this manner the useless space known in the earlier application has been put to use.
  • an air distribution unit which 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 and which has been formed of sound absorption board material.
  • the air enters the sound absorption chamber of the air distribution unit, it flows in the sound absorption chamber in a space of the sound absorption chamber tapering in cross-section. From the sound absorption chamber the air flows into the air outlet chamber of the air distribution unit. In the part of the air outlet chamber which is foremost in relation to the incoming flow direction the air flow changes direction at least 90°, and 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 may be used, or another equivalent air discharge surface, whereby the supply of air into the interior space can be regulated as desired.
  • the apparatus design of the invention enables completely silent air supply to spaces where people are staying.
  • Fig. 1 is depicted in axonometric perspective, and partly cut- open, an air distribution unit according to the invention.
  • Fig. 2 presents an air distribution unit according to the invention in cross-section, along the line I-I in Fig. 1.
  • the air distribution unit 10 of the invention comprises an outer envelope 11.
  • the air is arranged to enter the air absorption chamber 13 through the air duct, as shown by arrow L 1 .
  • the sound absorption chamber 13 is on its underside confined by an air absorption plate 14, which is a planar, plate-like part comprising sound absorption material.
  • the sound absorption plate is disposed obliquely against the air entry direction (direction of the x-axis).
  • the air flows, as shown by arrow L 2 in a space of the sound absorption chamber 13 tapering relative to the cross-section I-I and discharges into the outlet chamber 15 through the gap between the oblique sound absorption plate 14 and the sound absorbing material course 16 covering the inner surface of the outer envelope 11.
  • the air changes direction (arrows L 3 ) on arriving in the outlet chamber 15, and the change of direction is at least 90°, and in its substantial part more than 90°, and at the maximum, 180°.
  • the outlet duct 17 comprises a perforated plate, a louvre or another equivalent air discharge surface.
  • Fig. 2 is presented in cross-section the air distribution unit of Fig. 1.
  • the air flows as indicated by arrow L 1 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 against the air flow direction.
  • the air continues as indicated by arrows L 2 in the sound absorption chamber 13 tapering relative to the cross -section I-I. From the sound absorption chamber 13 the air flows into the outlet chamber 15 through the gap between the end margin 14' of the sound absorption plate 14 and the sound absorption course 16 abutting on the outer envelope 11.
  • the air discharges through the outlet duct 17 into the interior space or equivalent.
  • the air flow direction changes at least 90° with reference to the incoming air direction (arrow L 1 ; x-axis direction), substantially more than 90°.
  • Arrows L 3 illustrate the air flow which has changed direction.
  • the air discharges from the rear part 15b of the outlet chamber into the interior space as shown by arrows L 4 , through the air outlet duct 17 and the air discharge surface 17'.
  • the air distribution unit 10 may also comprise a damper regulating the air flow.
  • Said air flow -regulating damper may be placed e.g. in the inlet duct 12.
  • Such embodiments of the invention can furthermore be contemplated in which the inlet duct 12 is located in a wall of the sound absorption chamber 13 other than the the end wall shown in the figure.
  • the sound absorption chamber of the present invention efficiently damps the sound both from the regulator and from the duct system.
  • the sound absorption chamber 13 smooths out the flow entering the means, which may be turbulent indeed, and therefore, the flow L 4 exiting from the means is controlled at all times. Consequently, the flow entering the sound absorption chamber 13 exerts no influence on the flow L 4 .
  • a pressure pick-up or a connector 18 communicating with a pressure measuring instrument As shown in Fig. 2, in the sound absorption chamber 13 has been placed a pressure pick-up or a connector 18 communicating with a pressure measuring instrument. Pressure measruement further enables the air flow rate to be calculated. Pressure meauserment is specifically rendered possible by the efficient action of the sound absorption chamber as a space smoothing out the air flow.
  • the inlet ducts 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 independent thereof.
  • the air distribution unit of the invention may advantageously serve as incoming air unit, or as incoming air terminal member.
  • the apparatus may be mounted on the ceiling of a room space, and the apparatus may be employed to distribute the air without causing any significant sensational draught.
  • the air On entering the part of the outlet chamber below the sound absorption plate, the air discharges through a perforated plate or another equivalent discharge surface into the interior space. Silent, and draughtfree, supply of fresh air to spaces occupied by persons can be implemented 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)

Abstract

La présente invention se rapporte à une unité de diffusion d'air (10), comprenant une enveloppe extérieure (11) et un conduit d'admission d'air (12) ainsi que des conduits d'admission d'air (17). Depuis le conduit d'admission (12) l'air passe dans une chambre insonorisante (13), laquelle comporte une surface insonorisante disposée obliquement et constituée de préférence par une plaque insonorisante (14), de sorte qu'après avoir pénétré dans la chambre insonorisante (13), l'air s'écoule dans un espace de la chambre insonorisante (13), de section transversale décroissante (I-I), et passe de la chambre insonorisante (13) dans la chambre d'émission d'air (15) de la chambre de diffusion d'air (13), en modifiant sa direction d'écoulement d'au moins 90°, en général de plus de 90°.
EP89902262A 1988-02-19 1989-02-13 Unite de diffusion d'air Expired - Lifetime EP0354949B1 (fr)

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
FI880799A FI880799A7 (fi) 1988-02-19 1988-02-19 Luftfoerdelningsenhet.
FI880799 1988-02-19

Publications (2)

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

Family

ID=8525959

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89902262A Expired - Lifetime EP0354949B1 (fr) 1988-02-19 1989-02-13 Unite de diffusion d'air

Country Status (4)

Country Link
EP (1) EP0354949B1 (fr)
DE (1) DE68907148T2 (fr)
FI (1) FI880799A7 (fr)
WO (1) WO1989007739A1 (fr)

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
DK1589296T3 (da) * 2004-04-19 2013-09-30 Schako Klima Luft Indretning til indføring og/eller udføring af luft til/fra et rum
EP2574861A1 (fr) * 2011-09-29 2013-04-03 Ingenieurbuero consult+control Dr. -Ing. J. Westhaeusler Sortie d'air dotée d'un ventilateur

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1071924B (fr) *
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8907739A1 *

Also Published As

Publication number Publication date
FI880799A0 (fi) 1988-02-19
DE68907148D1 (de) 1993-07-22
EP0354949B1 (fr) 1993-06-16
DE68907148T2 (de) 1993-10-28
WO1989007739A1 (fr) 1989-08-24
FI880799A7 (fi) 1989-08-20

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