GB2282158A

GB2282158A - An acoustic liner assembly

Info

Publication number: GB2282158A
Application number: GB9318418A
Authority: GB
Inventors: Eoin T Mccarthy
Original assignee: Kingspan Research and Developments Ltd
Current assignee: Kingspan Research and Developments Ltd
Priority date: 1993-09-06
Filing date: 1993-09-06
Publication date: 1995-03-29
Anticipated expiration: 2013-09-06
Also published as: GB9318418D0; GB2282158B

Abstract

An acoustic liner assembly 1 comprises acoustic insulation material 6 supported by perforated liners 5 carried on purlins 10. Insulating roof panels (3, 4) are spaced above purlins 10 by spacers 8, defining an air passageway having inlets 14, 15. An air outlet 17 is provided centrally, and a fan 12 causes air circulation through passageway 12. In an alternative embodiment (Fig. 4, not shown) panels (3,4) are supported directly on purlins 10 which define air passageways between themselves through which air is circulated. <IMAGE>

Description

"An Acoustic Liner Assembly" This invention relates to an acoustic liner assembly for mounting on an internal surface of a building for noise damping within the building.

The invention particularly relates to an acoustic liner assembly for use in high humidity and relatively noisy environments such as swimming pools, leisure centres, manufacturing plants and the like.

According to the invention, there is provided an acoustic liner assembly for mounting on an internal surface of a building, comprising acoustic insulation means, means for mounting the acoustic insulation means spaced-apart from the mounting surface defining a passageway therebetween, said passageway having an air inlet and an air outlet for air circulation through the passageway.

Preferably the air inlet and the air outlet each communicate with an interior of the building for circulation of ambient air within the building through the cavity.

In another embodiment, means is provided for forced circulation of air through the passageway. Conveniently, said means may comprise an extraction fan mounted at the outlet of the passageway.

In a further embodiment the means for mounting the acoustic insulation means on the internal surface comprises a number of spaced-apart support brackets engageable with the internal surface and with the acoustic insulation means to support the acoustic insulation means spaced-apart from the internal surface.

In a particularly preferred embodiment, spacer means is provided for mounting against the support surface to extend outwardly therefrom to define the cavity between the support surface and the acoustic insulation means.

In another embodiment, the internal surface is an inner surface of panels forming a roof or wall of the building, said panels being hung on associated supports, such as purlins or side rails of a building support frame, wherein the acoustic insulation means is mounted between the supports and the internal surface. In an alternative arrangement, the acoustic insulation means may be mounted at an inner end of the supports spaced-apart from the internal surface.

In a further embodiment, the acoustic insulation means is mounted on a perforated liner.

In a preferred embodiment, the acoustic insulation means comprises insulation material mounted within a sealed airtight wrapper. Typically the acoustic insulation material may be a mineral wool such as rock wool.

Preferably, the wrapper is of polythene material.

The invention will be more clearly understood by the following description of some embodiments thereof, given by way of example only, with reference to the accompanying drawings, in which; Fig. 1 is a diagrammatic cross-sectional view of an acoustic liner assembly according to the invention mounted beneath a roof of a building; Fig. 2 is an elevational view of portion of the liner assembly; Fig. 3 is an end elevational view of the liner assembly portion shown in Fig. 2; Fig. 4 is a view similar to Fig. 1 showing an alternative mounting arrangement for the acoustic liner assembly; Fig. 5 is an elevational view of portion of the liner assembly of Fig. 4; and Fig. 6 is an end elevational view of the liner assembly portion shown in Fig. 5.

Referring to the drawings and initially to Figs. 1 to 3 thereof there is illustrated an acoustic liner assembly according to the invention indicated generally by the reference numeral 1. In Fig. 1, the liner assembly 1 is shown mounted beneath a roof 2 of a building, the roof 2 formed by insulation panels having an outer surface 3 and an inner surface 4. The assembly 1 comprises a perforated liner 5 carrying acoustic insulation material 6. It will be noted that the liner 5 is mounted spaced-apart from the inner surface 4 of the roof 2 by means of spacers 8 extending between the inner surface 4 and purl ins 10 which carry the liner 5 and support the roof 2. An air passageway 12 is thus defined between the insulation material 6 and the inner surface 4 of the roof 2 having air inlets 14, 15 adjacent the eaves and ridge respectively of the roof 2.An air outlet 17 for the passageway 12 is provided centrally in the liner 5.

To provide a forced air circulation through the passageway 12, a fan 18 is centrally mounted on the liner 5 within the outlet 17. The fan 18 draws air through the passageway 12 as indicated by the arrows in Fig. 1. Any suitable air flow through the passageway 12 can be provided. The acoustic insulation material 6 in this case comprises 50 mm thick rock wool semi-rigid slabs wrapped in polythene and held in place on the liner 5 with stick pins.

The spacers 8 are formed by steel stools 20 and associated inverted spacer channels 21 which sit on top of the stools 20 against the inner surface 4 of the roof 2. The stools 20 are fixed to each purlin 10 through the liner 5 to provide a support for the roof panels and to create the passageway 12 above the acoustic insulation 6. The channels 2.1 are fixed to the stools 20 by fasteners to conveniently provide a flush finish having downwardly extending side flanges 22 which define the passageway 12 between the inner surface 4 of the roof 2 and the acoustic insulation 6.

It will be appreciated that, advantageously, with the provision of the passageway 12 between the acoustic insulation 6 and an inner surface 4 of the roof 2, air circulation through the passageway 12 ensures that the air within the passageway 12 is at the same temperature and humidity as the internal air within the building. Thus, condensation is eliminated to prevent damage to the acoustic liner 1 and the inner surface 4 of the roof.

Referring now to Figs. 4 to 6, there is shown another acoustic liner assembly 30. The acoustic liner assembly 30 is generally similar to the acoustic liner assembly described previously and like parts are assigned the same reference numerals. In this case, no spacers are required. It will be seen from the drawings that the roof 2 is directly supported on the purlins 10. The liner 5 is fastened at an inner end of the purlins 10. Mounted above the liner 5 and between the purlins 10 are the slabs of insulation material 6. In this fashion, a passageway 32 is defined between the inner surface 4 of the roof 2 and the insulation material 6. The purlins 10 split the passageway 32 into a number of channels through which air is circulated. In this case, the fans (not shown) can be mounted at one end of the purlins to draw air through the passageway 32 between the purlins 10. It will be appreciated that a similar mounting arrangement for the acoustic liner could be provided at the side rails of the building frame which support the panels forming the side walls of the building.

It will be appreciated that while the acoustic liner in the embodiments described above is shown mounted on a roof of a building, similar constructions of acoustic liner could be provided on the side walls of a building.

The acoustic liner assembly according to the invention is particularly suitable for high humidity, relatively noisy environments, such as swimming pools, leisure centres, manufacturing plants and he like.

The invention is not limited to the embodiments hereinbefore described which may be varied in both construction and detail.

Claims

1. An acoustic liner assembly for mounting adjacent an internal surface of a building, comprising acoustic insulation means, means for mounting the acoustic insulation means spaced-apart from the internal surface defining a passageway therebetween, said passageway having an air inlet and an air outlet for air circulation through the passageway.

2. An acoustic liner assembly as claimed in claim 1 wherein the air inlet and air outlet each communicate with an interior of the building.

3. An acoustic liner assembly as claimed in claim 1 or claim 2 wherein means is provided for forced circulation of air through the passageway.

4. An acoustic liner assembly as claimed in claim 3 wherein the air circulation means is an extraction fan mounted at the outlet of the passageway.

5. An acoustic liner assembly as claimed in any preceding claim wherein the means for mounting the acoustic insulation means adjacent the internal surface comprises a number of support brackets engageable with the internal surface and with the acoustic insulation means to support the acoustic insulation means spaced-apart from the internal surface.

6. An acoustic liner assembly as claimed in any preceding claim wherein spacer means is provided for mounting against the internal surface to extend outwardly therefrom to define the cavity between the internal surface and the acoustic insulation means.

7. An acoustic liner assembly as claimed in any of claims 1 to 4 wherein the internal surface is an inner surface of panels forming a roof or wall of the building, said panels being hung on associated supports, such as purlins or side rails, of a building support frame, wherein the acoustic insulation means is mounted between the supports and the internal surface.

8. An acoustic liner assembly as claimed in any of claims 1 to 4 wherein the internal surface is an inner surface of panels forming a roof or wall of the building, said panels being hung on associated supports, such as purlins or side rails, of a building support frame, wherein the acoustic insulation means is mounted at an inner end of the supports spaced-apart from the internal surface.

9. An acoustic liner assembly as claimed in any preceding claim wherein the acoustic insulation means is mounted on a perforated liner.

10. An acoustic liner assembly as claimed in any preceding claim wherein the acoustic insulation means comprises insulation material mounted within a sealed airtight wrapper.

11. An acoustic liner assembly as claimed in claim 10 wherein the wrapper is of polythene material.

12. An acoustic liner assembly substantially as hereinbefore described with reference to the accompanying drawings.

13. A building incorporating an acoustic liner assembly as claimed in any preceding claim.