DE102011121164B4 - Beam surface construction with absorption box - Google Patents

Abstract

Radiant surface structure (1) for tempering a room with a radiant ceiling panel (2) facing the room to be tempered and with a pipe register (6) through which a heat transfer medium flows, with an absorption layer (4) and on the side facing away from the room to be tempered In addition, an absorption box (5) filled with a sound-absorbing material (10) is arranged for sound absorption, the absorption box (5) having side walls (8), two of which are provided with through openings (9) at least in some areas, characterized in that the cuboid Absorption box (5) in the two longitudinal side walls (8) has through openings (9) with a diameter of 5 mm to 20 mm, which are arranged in a grid at a distance of 10 mm to 50 mm, the cuboid absorption box (5) being closed , unperforated end walls and a closed, unperforated top (11).

Description

The invention relates to a jet surface structure for tempering a room with a radiant ceiling plate, which faces the room to be tempered and is connected to a flow-through by a heat transfer medium pipe register, wherein on the side facing the temperature to be tempered side, an absorption layer is provided.

It is known, jet surface structures, which are designed as sheet-like elements and are also referred to as heating / cooling sail, depend on the ceiling of a room to temper this, so cool or heat as needed. In the utility model DE 297 02 313 U1 It is proposed to use such beam surface structures in addition as insulating elements against acoustic influences. For this purpose, an insulating layer of an acoustic absorption material is provided on the side facing away from the space surface of the jet surface. This allows not only to regulate the temperature of the room but also to reduce the noise level in the room.

In the utility model DE 93 21 610 U1 describes sound-absorbing lightweight panels in which a fluid pipe network is embedded, which serves for heat dissipation and is connected to a coolant source.

The DE 10 2004 018 278 B4 describes a flat arranged cooling or heating blanket with cooling tubes, which are traversed by a liquid. Above the cooling tubes, an air distribution box is provided which has one connection and several outlets. Through the connection, the air distribution box is supplied with supply air, which is passed through the outputs of the air distribution box to air ducts and flows from there to the room. In order to ensure the lowest possible possible distribution of the supply air to the air ducts, the air distribution box is provided with a sound-absorbing lining. Thus, the sound insulation acts exclusively in relation to the supply of air. Since the air distribution box is closed to the environment, this can not cause a reduction in the noise level of the room.

To reduce the noise level, it is for example from the WO 96/12144 A1 known to provide a ceiling element for a heating and cooling ceiling with an insulation mat. For temperature control of the ceiling element, a heat transfer medium is passed through a meandering aligned hose. In addition, an acoustic fleece may be provided in an edge region of the ceiling panel.

The DE 20 2008 001 602 U1 describes a sound absorber with a ceiling sail, which may contain sound-absorbing material or consists of this. On the ceiling sail, a low frequency absorber may be applied, which may be coated or sheathed to improve abrasion resistance.

The DE 195 00 670 C1 describes a cooling device with a perforated cladding panel and an insulating material facing away from the room to be tempered, which acts both heat and sound insulation.

Also from the DE 10 2009 055 440 A1 is a ceiling element for controlling the temperature of a room is known, which has a fleece to ensure good sound absorption. For covering the ceiling element, a perforated graphite foil is proposed, wherein the holes of the perforation allow the penetration of sound waves in the ceiling element. The sound waves can thus be damped within the ceiling element, whereby the total sound absorption is increased.

The cited documents have in common that only an absorption layer is mounted on the ceiling sail.

It is therefore an object of the present invention to provide a jet surface structure of the type mentioned, which allows improved sound absorption within a room, with substantially constant Temperierungseigenschaften the jet surface structure.

This object is achieved essentially by a jet surface structure having the features of claim 1. For this purpose, it is provided that on the side facing away from the room to be tempered in addition to the absorption layer, an absorption box for sound absorption is arranged, which is filled with a sound-absorbing material and has the side walls, at least two of which are at least partially provided with through holes. As a result, in contrast to a system with only one flat absorption layer, a significantly improved degree of sound absorption (α _s ) is achieved in the room to be tempered. Sound waves striking the beam surface structure from the space can either enter the absorption box through openings optionally provided in the radiant ceiling panel or, in particular, through the through openings provided in the side walls of the absorption box, in which they are attenuated by the sound-absorbing material.

In a further development of this idea, it is provided that the Absorptionsbox cuboid is formed and has at least one fully open side. In particular, the underside of the absorption box is completely open. Thus, it is achieved that sound emissions emanating from people or equipment in the room, through openings that may be provided in the radiant ceiling panel, enter the absorption box and be absorbed there.

In a particularly preferred embodiment, the absorption layer of the jet surface structure is formed as an acoustic fleece. An acoustic fleece is characterized in that even a thin layer achieves a noticeable absorption effect. In addition to the absorption layer, a thermal insulation layer may be provided on the side of the tube register facing away from the space to be tempered in order to minimize the heat transfer in the direction away from the space.

The sound-absorbing properties of the absorption box and thus of the jet surface structure can be significantly improved if the absorption box is filled with insulating wool, in particular mineral wool. According to the invention, provision may also be made for the absorption box to be lined or filled with other acoustic insulation materials and / or sound-absorbing components.

In a further development of this idea, the property of the absorption box can be further improved by the absorption box itself being made of a sound-absorbing material, in particular of corrugated cardboard. This dampens the noise level even before it enters the absorption box. Additionally or alternatively, the absorption box can be enveloped from the outside with a sound-absorbing material or at least partially covered.

According to the invention, the absorption box in the two longitudinal side walls openings, which have a diameter of about 5 mm to about 20 mm. Preferably, the openings are arranged in a grid at a distance of about 10 mm to about 50 mm. Particularly advantageous are a hole size of about 10 mm and a distance of the grid of about 20 mm have been found.

Furthermore, according to the invention, the end walls and the top wall (upper side) of the cuboid absorption box are closed, d. H. they have no opening or holes. This prevents the sound waves from leaving the absorption box directly after entering the absorption box. As a result, sound waves in the absorption box can be reflected several times on the end walls and the ceiling wall, whereby a good attenuation of the sound waves is achieved.

A particularly high degree of sound absorption (α _s ) can be achieved in that the ratio of the area of the openings of the radiant ceiling panel to the base area of the radiant ceiling panel is greater than 0.05, preferably greater than 0.1. A particularly good sound absorption capacity results at a ratio greater than 0.2.

Surprisingly, even a relatively small absorption box can achieve a high degree of sound absorption (α _s ). Thus, the ratio of the base area of the absorption box to the base area of the radiant ceiling panel is preferably in a range of greater than 0.05 and less than 0.5. Already in a range between about 0.1 to 0.2, a sufficiently good sound absorption for sports halls can be achieved.

In a preferred embodiment, the absorption box is arranged at a distance from the free edges of the cover jet plate in such a way that it is not perceived as disturbing by the room to be tempered and, moreover, is protected against damage. Particularly preferred is an arrangement in which the distance of the absorption box to the free edges at least equal to the height of the absorption box.

It is particularly preferred if the sound absorption coefficient (α _s ) measured according to ISO 354: 2003 in a frequency range between 200 Hz and 5000 Hz is greater than 0.5. In particular, the sound absorption coefficient (α _s ) in a frequency range between 300 Hz and 2500 Hz is above 0.8. Measured according to ISO 11654, the sound absorption coefficient (α _s ) in a frequency range between 1000 Hz and 2000 Hz is at least 0.85.

The invention will be explained in more detail using an exemplary embodiment and with reference to the drawing. All described and / or illustrated features alone or in any combination form the subject matter of the invention, regardless of their summary in the claims or their back references.

They show schematically:

1 a view of a jet surface structure from below;

2 a sectional view of a jet surface structure along the cutting axis II 1 ;

three a side view of the absorption box without radiant panel and pipe register;

4 a sectional view taken along the cutting axis IV three ; and

5 a diagram of the sound absorption coefficient (α _s ) of a beam surface structure according to the invention depending on the frequency.

1 shows a beam surface construction 1 from the side of the room to be tempered. You can see the radiating surface of a radiant ceiling panel 2 with openings three placed in a regular grid over the entire surface of the radiant ceiling panel 2 are distributed. Through the openings three can sound waves from the room through the radiant ceiling panel 2 pass.

Like the sectional view of the 2 shows is on the side facing away from the room to be tempered ceiling radiant panel 2 is an absorption layer 4 applied, for example glued. An absorption box 5 is centrally located on the longitudinal axis of the jet surface structure and laterally of a pipe register 6 surround. The pipe register 6 is traversed in a conventional manner by a heat transfer medium and is for heat transfer in contact with the radiant ceiling panel 2 , In the illustrated embodiment, the pipe register 6 arranged symmetrically about the center M of the beam surface structure.

At the free edges of the radiant ceiling panel 2 there are side plates 7 perpendicular to the radiating surface facing the radiating surface of the radiant ceiling panel 2 run.

In three is a side view of the absorption box 5 shown. This is over much of the longitudinal side walls 8th with passage openings 9 Mistake. Through the passage openings 9 can sound waves, which are laterally on the absorption box 5 hit, penetrate into this. From the sectional view of the absorption box 5 to 4 it can be seen that the absorption box 5 with a sound absorbing material 10 , like insulating wool, is filled. The top 11 the absorption box 5 , So the side facing away from the room to be tempiertem, as well as the end faces are completely closed in the illustrated example. The bottom 12 the absorption box 5 is completely open and allows contact with the radiant ceiling panel 2 over the absorption layer 4 ,

In addition to the absorption layer 4 Optionally, a thermal insulation layer can be provided on the side of the tube register facing away from the space to be tempered in order to minimize the heat transfer in the direction away from the space. The absorption box 5 can be arranged on the thermal insulation layer. The thermal insulation layer can contribute to the sound absorption, but the main purpose is the thermal insulation.

5 shows the sound absorption coefficient (α _s ) of a beam surface structure according to the invention as a function of the frequency (f) measured according to ISO 354: 2003. For this purpose, a beam surface structure with four radiant ceiling panels, each having a dimension of 1000 mm × 1500 mm × 40 mm, arranged at a height of 160 mm above the floor of a hall with a volume of 204.6 m ³ . On the back of the radiant ceiling panels was a fleece (type AVP 100 Fa. Lantor) attached. In addition, each was filled with mineral wool absorption box of perforated cardboard (hole diameter 10 mm, grid 25 mm) with dimensions of 150 mm × 900 mm × 150 mm on the radiant ceiling panels arranged. The radiant ceiling panels consisted of a 0.75 mm thick steel sheet with a hole content of 21%.

As from the diagram of 5 As can be seen, a significant reduction in noise was achieved, in particular in the range of about 2000 Hz to about 4500 Hz, which is particularly audible for humans.

LIST OF REFERENCE NUMBERS

1

Beam area construction

2

Radiant ceiling panels

3

openings

4

absorbing layer

5

Absorptionsbox

6

pipe register

7

side panels

8th

Side walls / longitudinal side walls

9

Through openings

10

sound-absorbing material / insulating wool

11

top

12

bottom

M

Center of the beam surface construction

Claims (8)

Beam surface structure ( 1 ) for tempering a room with a radiant ceiling panel ( 2 ), which faces the space to be tempered, and with a flow through a heat transfer medium pipe register ( 6 ), wherein on the side facing away from the room to be tempered an absorption layer ( 4 ) and in addition one with a sound-absorbing material ( 10 ) filled absorption box ( 5 ) are arranged for sound absorption, wherein the absorption box ( 5 ) Side walls ( 8th ), of which two at least partially with through holes ( 9 ), characterized in that the cuboid absorption box ( 5 ) in the two longitudinal side walls ( 8th ) Passage openings ( 9 ) having a diameter of 5 mm to 20 mm, which are arranged in a grid with a distance of 10 mm to 50 mm, wherein the cuboid absorption box ( 5 ) closed, unperforated end walls and a closed, unperforated top ( 11 ) having. Beam surface structure according to claim 1, characterized in that the absorption box ( 5 ) cuboid with at least one completely open side, in particular the underside ( 12 ), is designed. Beam surface structure according to claim 1 or 2, characterized in that the absorption layer ( 4 ) is an acoustic fleece. Beam surface structure according to one of the preceding claims, characterized in that the absorption box ( 5 ) is filled with insulating wool, especially mineral wool. Beam surface structure according to one of the preceding claims, characterized in that the absorption box ( 5 ) consists of a sound-absorbing material, in particular corrugated cardboard. Beam surface structure according to one of the preceding claims, characterized in that the radiant ceiling panel ( 2 ) Openings ( three ), wherein the ratio of the area of the openings ( three ) of the radiant ceiling panel ( 2 ) to the base of the radiant ceiling panel ( 2 ) is greater than 0.05, in particular greater than 0.1. Beam surface structure according to one of the preceding claims, characterized in that the ratio of the base area of the absorption box ( 5 ) to the base of the radiant ceiling panel ( 2 ) is greater than 0.05 and less than 0.5, in particular 0.1 to 0.2. Beam surface structure according to one of the preceding claims, characterized in that the absorption box ( 5 ) to the free edges of the radiant ceiling panel ( 2 ) is arranged at a distance, in particular by a distance which is at least equal to the height of the absorption box ( 5 ) corresponds.

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