EP0443279A1 - Schallgedämmtes Lufteinlassgehäuse - Google Patents

Schallgedämmtes Lufteinlassgehäuse Download PDF

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Publication number
EP0443279A1
EP0443279A1 EP90403554A EP90403554A EP0443279A1 EP 0443279 A1 EP0443279 A1 EP 0443279A1 EP 90403554 A EP90403554 A EP 90403554A EP 90403554 A EP90403554 A EP 90403554A EP 0443279 A1 EP0443279 A1 EP 0443279A1
Authority
EP
European Patent Office
Prior art keywords
housing
absorbent material
layer
sound
longitudinal
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.)
Withdrawn
Application number
EP90403554A
Other languages
English (en)
French (fr)
Inventor
Jean-Paul Cussenot
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.)
Ferco International Usine de Ferrures de Batiment
Original Assignee
Ferco International Usine de Ferrures de Batiment
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 Ferco International Usine de Ferrures de Batiment filed Critical Ferco International Usine de Ferrures de Batiment
Publication of EP0443279A1 publication Critical patent/EP0443279A1/de
Withdrawn legal-status Critical Current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
    • F24F13/24—Means for preventing or suppressing noise
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/02—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/02—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
    • E06B7/10—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses by special construction of the frame members

Definitions

  • the present invention relates to an isophonic air inlet box.
  • Such devices are arranged on or through walls of a building or dwelling and allow the entry of air inside them. They are suitable for both so-called natural ventilation arising from heat flows between rooms and between the outside and inside of the home, as well as ventilation carried out mechanically by extraction. They are designed on the one hand to fulfill ventilation functions but also to fulfill acoustic insulation functions.
  • Such isophonic air inlet boxes generally consist of a U-shaped section shell comprising on its inner wall an absorbent coating of acoustic insulation and on one of the longitudinal walls an air flow outlet formed a number of holes.
  • the interior of the housing is filled as much as possible with an absorbent material in order to obtain the best possible sound absorption.
  • the present invention proposes to use, in such a ventilation unit, the so-called membrane effect known in the acoustic field. When a sound hits a smooth membrane, it results in a mass-spring phenomenon accompanied by reflection. The natural resonance of the membrane is negligible since no external or internal volume of the aeration amplifies the induced effects. There is no resonance due to the external environment of the aerator and the internal design of the aerator remains a sound trap.
  • the present invention therefore proposes to considerably improve the acoustic qualities of an aerator, by exploiting this so-called membrane effect.
  • the isophonic air inlet box according to the invention therefore consists of a U-shaped section shell comprising an absorbent coating of interior acoustic insulation and on at least one of its longitudinal walls, at least one hole air flow outlet.
  • This housing is remarkable in that at least one of the longitudinal interior walls of the housing is devoid of acoustic absorbent material, the absorbent material being a foam with closed cells on the surface.
  • the housing can be made of plastic, preferably PVC, ABS or metallic material.
  • the volume of foam used is modified and reduced and this results in a significant reduction in manufacturing costs, while retaining an excellent sound absorption efficiency since it allows a gain sound absorption greater than 2 dB compared to known ventilation devices.
  • the nozzle device installed inside the ventilation device does not necessarily have to be placed in front of the outlet holes of the housing and this allows a certain freedom as to the length of the nozzle or air regulation device.
  • the isophonic air inlet box 10 is conventionally constituted by a shell of U-shaped section, preferably made of PVC or ABS, and comprising on one of these walls longitudinal an air outlet 11.
  • the invention relates to housings comprising two air outlets 11 elongated near the ends of one of the longitudinal walls.
  • the incoming air flow must circulate inside the housing before being evacuated by the outlet orifices 11.
  • the inlet of the housing 10 is conventionally equipped with a nozzle 12 which subjects the reentry air flow to a deviated trajectory.
  • a nozzle 12 which subjects the reentry air flow to a deviated trajectory.
  • the incoming air is deflected so as to have an initial trajectory perpendicular to one of the longitudinal faces of the housing 10.
  • the object of the invention is to very specifically equip the interior of the housing with insulating material.
  • the housing 10 is therefore equipped with the nozzle 12, on one of its longitudinal walls 13 with a layer of absorbent material 13 ', on its bottom 14 with a layer of absorbent material 14' and its longitudinal wall 15 is left blank any absorbent material.
  • the nozzle 12 is preferably a membrane flow control device known per se.
  • the phonic circuit will now be described, in a relatively simplified manner inside the ventilation box 10.
  • the arrows 1 diagrammatically propagate the sound in the direction of the layer of absorbent material with a smooth surface 13 and by impact of the sound with the surface thereof, a classic sound absorption phenomenon is therefore carried out to which is added a phenomenon of noise reflection and damping shown by the arrows 2.
  • the dotted arrows F S show diagrammatically the air leaving the ventilation box through the holes already described 11.
  • the layers of absorbent material 13 'and 14' taking into account the damping and absorption of sound at the level thereof, and also the reflection at the level of the wall longitudinal 15, the residual sound passing through the latter is of a low sound level lower than the admissible level for such ventilation boxes.
  • the nozzle can divert the reentry air flow differently and as a result, the arrangement of the coated walls and the uncoated wall can be modified.
EP90403554A 1990-02-23 1990-12-12 Schallgedämmtes Lufteinlassgehäuse Withdrawn EP0443279A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9002288 1990-02-23
FR9002288A FR2658846B1 (fr) 1990-02-23 1990-02-23 Boitier d'entree d'air isophonique.

Publications (1)

Publication Number Publication Date
EP0443279A1 true EP0443279A1 (de) 1991-08-28

Family

ID=9394083

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90403554A Withdrawn EP0443279A1 (de) 1990-02-23 1990-12-12 Schallgedämmtes Lufteinlassgehäuse

Country Status (3)

Country Link
EP (1) EP0443279A1 (de)
CA (1) CA2032569A1 (de)
FR (1) FR2658846B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2728600A1 (fr) * 1994-12-21 1996-06-28 Alcan France Dispositif d'isolation et d'amortissement phoniques, notamment pour porte, fenetre ou analogue
EP1751361A1 (de) * 2004-05-07 2007-02-14 Christopher James Matthews Lüftungsvorrichtung und rahmensystem

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2685052B1 (fr) * 1991-12-13 1994-04-08 Onet Sa Dispositif de vannes et de detendeurs silencieux.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2817915A1 (de) * 1978-04-24 1979-10-25 Fsl Fenster System Lueftung Fuer den einbau unterhalb von aussenfenstern vorgesehenes kastenfoermiges luftfuehrungselement
FR2558516A1 (fr) * 1984-01-19 1985-07-26 Saint Gobain Vitrage Isolation acoustique de bouches d'aeration de fenetres
EP0277064A1 (de) * 1987-01-19 1988-08-03 FERCO INTERNATIONAL Usine de Ferrures de BÀ¢timent Société à responsabilité limitée Lüftungsvorrichtung mit Schallisolierung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2817915A1 (de) * 1978-04-24 1979-10-25 Fsl Fenster System Lueftung Fuer den einbau unterhalb von aussenfenstern vorgesehenes kastenfoermiges luftfuehrungselement
FR2558516A1 (fr) * 1984-01-19 1985-07-26 Saint Gobain Vitrage Isolation acoustique de bouches d'aeration de fenetres
EP0277064A1 (de) * 1987-01-19 1988-08-03 FERCO INTERNATIONAL Usine de Ferrures de BÀ¢timent Société à responsabilité limitée Lüftungsvorrichtung mit Schallisolierung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2728600A1 (fr) * 1994-12-21 1996-06-28 Alcan France Dispositif d'isolation et d'amortissement phoniques, notamment pour porte, fenetre ou analogue
EP1751361A1 (de) * 2004-05-07 2007-02-14 Christopher James Matthews Lüftungsvorrichtung und rahmensystem
EP1751361A4 (de) * 2004-05-07 2009-12-02 Silenceair Internat Pty Ltd Lüftungsvorrichtung und rahmensystem

Also Published As

Publication number Publication date
FR2658846A1 (fr) 1991-08-30
FR2658846B1 (fr) 1992-05-15
CA2032569A1 (fr) 1991-08-24

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