BEAM SURFACES WITH ABSORPTION BODY

Description

[0001] The invention relates to a radiant surface structure for tempering a room with a ceiling radiant panel which faces the room to be tempered and is connected to a pipe register through which a heat transfer medium flows, wherein an absorption layer is provided on the side facing away from the room to be tempered.

[0002] It is known from DE 10 2011 121 164 B4 to provide, in a radiant surface structure of the above-mentioned type, an absorption layer on the side facing away from the room to be tempered, as well as an absorption box filled with a sound-absorbing material for sound absorption. The absorption box has two longitudinal side walls, which are provided, at least in some regions, with through-openings with a diameter of 5 mm to 20 mm, arranged in a grid with a spacing of 10 mm to 50 mm. The cuboid-shaped absorption box has closed, unperforated end walls and a closed, unperforated top side. DE 10 2011 121 164 B4 thus discloses a radiant surface structure with the features of the preamble of claim 1.

[0003] From DE 32 02 078 A1 it is also known to cover an absorption core, comprising a core layer and a cover layer, with a protective film.

[0004] Furthermore, it is known from DE 20 2016 107 007 U1 to wrap a sound absorption module in the form of a fiber-containing material for a cooling and / or heating module in a film.

[0005] It is therefore an object of the present invention to provide a radiant surface structure of the type mentioned at the outset which enables further improved sound absorption within a room, with essentially constant temperature control properties of the radiant surface structure.

[0006] This object is essentially achieved by a jet surface structure having the features of claim 1.

[0007] For this purpose, a body made of a sound-absorbing material is additionally arranged on a side of the radiant surface structure facing away from the room to be tempered. Furthermore, the body made of the sound-absorbing material has a wall on at least one side, with the body and the wall being jointly enclosed by a film. The wall is made of a material that is stiffer than the film, and the film has an at least partially uneven and / or irregular surface.

[0008] It has proven particularly advantageous if the film is made of a plastic, in particular low-density polyethylene (LDPE). Surprisingly, it was discovered that a film that, unlike the smooth walls of a conventional box, does not have a flat, regular surface, achieves an even better sound absorption coefficient (α s ) in the room to be heated. The production of the radiant surface structure is simpler and can be more flexibly adapted to the installation situation and the size of the radiant surface structure than is possible with conventional boxes with fixed dimensions.

[0009] The body wrapped in the foil can have an approximately cuboid shape. Sound waves hitting the radiant surface structure from the room can reach the body either through openings provided optionally in the radiant ceiling panel or, in particular, laterally through the foil, where they are further attenuated by the sound-absorbing material.

[0010] The rigidity of the body, and thus its processability and dimensional stability when installed, are improved by providing, in addition to the film, a wall made of a material that is stiffer than the film on at least one side of the body. The wall is located between the outer film and the inner body. Thus, several sides, in particular longitudinal side walls, can be made of a material that is stiffer than the film. The at least one wall can itself be made of a non-metallic sound-absorbing material such as cardboard or plastic, in particular corrugated cardboard, or of a metallic sound-absorbing material such as aluminum.

[0011] In a particularly stable embodiment, the body has the wall on at least two longitudinal sides along a main direction of extension. Most preferably, the two longitudinal sides are opposite each other.

[0012] In a particularly compact and easy-to-manufacture embodiment, the body has a wall only on the side facing the radiating surface structure. To achieve a particularly high sound absorption coefficient, the wall in this embodiment is a metal sheet, preferably an aluminum sheet.

[0013] Regardless of the position of the wall(s), the film completely encloses the body and the wall. Thus, the body, the wall, and the film form a single, closed absorption unit. In particular, the film protects the body and the wall from the penetration of moisture, foreign substances, and pests. This increases the durability of the radiant surface structure.

[0014] Furthermore, the film prevents components of the sound-absorbing material of the body and / or wall from escaping to the outside. All material of the body and wall is retained inside by the film.

[0015] In addition, the body and the wall are held together by the film. The film prevents the wall from separating from the body or the wall and body from shifting relative to one another. In addition, the body is stiffened by the wall, which is wrapped around the body by the film. This makes the absorption unit consisting of body, wall and film much easier to handle than the body on its own. This makes assembling and installing the radiation surface structure much easier. Due to the stabilization, there is also less risk of the body itself or the film being damaged during installation. In particular, the stabilization provided by the wall enclosed in the film prevents the film from being damaged by bending the body during installation or removal, which could then prevent components of the body from protruding from the film.

[0016] In addition, the unit, consisting of the body, wall, and film, can be manufactured and transported independently. This simplifies the production of the blasting surface structure.

[0017] The sound-absorbing effect can be further improved if at least one wall is provided with through-openings in some areas. Particularly good sound absorption can be achieved if the through-openings have a diameter of approximately 2 mm to approximately 20 mm, preferably 8 mm to 12 mm, in particular approximately 10 mm, and are arranged in a grid with a spacing of approximately 5 mm to approximately 50 mm, preferably 20 mm to 30 mm, in particular approximately 25 mm.

[0018] Alternatively, the at least one wall can be closed. This is particularly preferred if the wall is a wall on one end of the body or the upper wall facing away from the room to be heated, when installed. This allows sound waves in the body to be reflected multiple times by the end walls and the ceiling wall, thereby achieving good sound wave attenuation.

[0019] If the body is cuboid-shaped, it preferably has at least one completely open side. In particular, the underside can be completely open. "Open" in this sense means that there is no wall at this point. This ensures that sound emissions emanating from people or devices in the room enter the body through openings that may be provided in the radiant ceiling panel and are absorbed there. Instead of a completely open underside, the panel can also have only an outer frame, e.g., made of a material that is stiffer than the foil, creating a central, open opening. In any case, the body is also closed off to the outside at the open sides and / or open openings by the surrounding foil.

[0020] Because the body and the wall are completely enclosed by the foil, one or more outer surfaces of the absorption unit are not regular and not completely flat. The foil may, for example, wrinkle. This improves sound absorption.

[0021] In a particularly preferred embodiment, the absorption layer of the radiant surface structure is designed as an acoustic fleece. An acoustic fleece is characterized by the fact that even a thin layer achieves a noticeable absorption effect. In addition to the absorption layer, a thermal insulation layer can be provided on the side of the pipe register facing away from the room to be heated to minimize heat transfer in the direction away from the room.

[0022] The sound-absorbing properties of the radiant surface structure can be significantly improved if the body is made of insulating wool, especially mineral wool, or if the foil is filled with it. According to the invention, the body can also be lined or filled with other acoustic insulation materials and / or sound-absorbing components.

[0023] A particularly high sound absorption coefficient (α s ) can be achieved by ensuring that the ratio of the area of ​​the openings in 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 is achieved with a ratio greater than 0.2.

[0024] Surprisingly, even a relatively small body can achieve a high sound absorption coefficient (α s ). The ratio of the body's base area to the base area of ​​the radiant ceiling panel is preferably in a range of greater than 0.05 and less than 0.5. Even a range between approximately 0.1 and 0.2 can achieve sufficient sound absorption for sports halls.

[0025] In a preferred embodiment, the body is arranged at a distance from the free edges of the radiant panel such that it is not perceived as disruptive from the room to be heated and is also protected from damage. An arrangement in which the distance between the body and the free edges corresponds at least to the height of the body is particularly preferred.

[0026] 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, most preferably greater than 0.7. 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.

[0027] The invention is explained in more detail below using an exemplary embodiment and with reference to the drawing. All described and / or illustrated features, individually or in any combination, constitute the subject matter of the invention, regardless of their summary in the claims or their references.

[0028] They show schematically: Fig. 1 is a view of a jet surface structure according to a first embodiment of the invention from below; Fig. 2 is a sectional view of a jet surface structure along section axis II of Fig.1 ; Fig. 3 a side view of an absorption unit of the beam surface structure from Fig. 1 without radiant ceiling panel and pipe register; Fig. 4 a sectional view along the section axis IV from Fig. 3 ; Fig. 5 a diagram of the sound absorption coefficient (α s ) of the radiant surface structure according to the invention from Fig. 1depending on the frequency; Fig. 6 a side sectional view of a radiating surface structure according to a second embodiment of the invention; Fig. 7 a side sectional view of a radiating surface structure according to a third embodiment of the invention; Fig. 8 a side sectional view of a radiating surface structure according to a fourth embodiment of the invention; Fig. 9 a side sectional view of a radiating surface structure according to a fifth embodiment of the invention; and Fig. 10 a diagram of the sound absorption coefficient (α s ) of the radiating surface structure according to Fig. 6 compared to a conventional beam surface structure depending on the frequency.

[0029] Fig. 1shows a radiant surface structure 1 from the side of the room to be heated. The figure shows the radiant surface of a radiant ceiling panel 2 with openings 3 distributed in a regular grid across the entire surface of the radiant ceiling panel 2. Sound waves from the room can pass through the openings 3 through the radiant ceiling panel 2.

[0030] As the sectional view of the Fig. 2shows, an absorption layer 4 is applied, e.g. glued, to the side of the radiant ceiling panel 2 facing away from the room to be temperature-controlled. An absorption body 5 made of sound-absorbing material 10 is arranged centrally on the longitudinal axis of the radiant surface structure and is laterally surrounded by a pipe register 6. A heat transfer medium flows through the pipe register 6 in a manner known per se and is in contact with the radiant ceiling panel 2 for heat transfer. In the illustrated embodiment, the pipe register 6 is arranged symmetrically around the center point M of the radiant surface structure.

[0031] At the free edges of the radiant ceiling panel 2 there are side plates 7 which run perpendicular to the radiant surface of the radiant ceiling panel 2 facing the tempering room.

[0032] In Fig. 3 a side view of an absorption unit 12 is shown. Fig. 2 and 4It can be seen that the absorption body 5 in the illustrated example is provided laterally with an outer wall 9. In addition, the absorption body 5 and the wall 9 are jointly covered with a film 8 made of low-density polyethylene (LDPE). In this way, the absorption unit 12 (consisting of absorption body 5, wall 9 and film 8) is formed. In this case, the film 8 encloses the absorption body 5 and the wall 9 sufficiently firmly in the present embodiment, so that the wall 9 and the absorption body 5 at least cannot shift significantly relative to each other. The open lateral contour of the absorption body 5 on the side opposite the wall 9 is not flat and irregular due to the covering with the film 8. The Fig. 2 and 4The contour shown is exaggeratedly profiled for illustrative purposes. In the example shown, only one wall 9 is shown. Alternatively, the wall 9 may be provided at a different location, or multiple walls 9 may be provided.

[0033] A large part of the wall 9 is provided with through-openings 11. Through these openings, sound waves that strike the absorption unit 12 from the side can pass through the film 8 and the openings of the wall 9 and penetrate into the absorption body 5. The sectional view of the absorption unit 12 according to Fig. 4 It can be seen that the absorption unit 12 has a partially irregular contour due to the film 8, with which the sound-absorbing material 10, such as insulating wool, is surrounded.

[0034] The top side of the absorption body 5, i.e., the side facing away from the room to be heated, as well as the end faces, are completely enclosed by the foil 8. These sides can also be enclosed by walls 9. On the underside of the absorption body 5, however, preferably no wall 9 is formed, so that the underside—apart from the foil 8—is largely open, and so that the absorption body 5 is in contact with the radiant ceiling panel 2 on the underside via the foil 8 and the absorption layer 4.

[0035] In addition to the absorption layer 4, a thermal insulation layer can optionally be provided on the side of the pipe register facing away from the room to be heated to minimize heat transfer in the direction away from the room. The absorption unit can be arranged on the thermal insulation layer. The thermal insulation layer can also contribute to sound absorption, but its primary purpose is thermal insulation.

[0036] Fig. 5shows the sound absorption coefficient (α s ) of a radiant surface structure according to the invention as a function of frequency (f), measured according to ISO 354:2003. For this purpose, a radiant surface structure with four radiant ceiling panels was arranged at a height of 160 mm above the floor of a hall. A fleece was attached to the back of the radiant ceiling panels. In addition, an absorption unit was arranged on each of the radiant ceiling panels. The absorption unit consisted of a box made of perforated cardboard (hole diameter 10 mm, grid pitch 25 mm) filled with mineral wool, which was completely enclosed by an LDPE film. The radiant ceiling panels were made of sheet steel with a perforation ratio of 21%.

[0037] As can be seen from the diagram of the Fig. 5 As can be seen, a significant reduction in noise was achieved, particularly in the range of approximately 2000 Hz to approximately 4500 Hz, which is particularly audible to humans.

[0038] In Fig. 6An alternative second embodiment of the jet surface structure 1 according to the invention is shown. As in Fig. 2 , an absorption layer 4 is applied, e.g., glued, to the side of the radiant ceiling panel 2 facing away from the room to be heated. In the example shown, the pipe register 6 is evenly distributed across the radiant ceiling panel 2 and is flowed through by a heat transfer medium.

[0039] An absorption body 5 is arranged on the side facing away from the room to be heated. This body can rest directly on the pipe register 6, as shown, or alternatively, be attached above the pipe register in some other way.

[0040] The absorption body 5 has a sound-absorbing material 10 inside, preferably an insulating wool, for example, mineral wool. The sound-absorbing material 10 rests on a wall 9. In this embodiment, the wall is preferably a metal sheet, preferably an aluminum sheet. The wall 9 thus carries the sound-absorbing material 10 and supports it on the pipe register 6. The sound-absorbing material 10 resting on the wall 9 is enclosed by a film 8, so that the combination of film 8, wall 9, and sound-absorbing material 10 forms a compact absorption body 5.

[0041] The Fig. 6The geometric relationships shown between the width of the wall 9, the width of the sound-absorbing material 10 and the width of the radiant ceiling panel 2, as well as the arrangement of the pipe register 6, serve only as an example and must be dimensioned with reference to the specific application. The height of the absorption body 5 can be compared with the embodiment of the Fig. 1 to 4 be kept low and is, for example, less than 100 mm, e.g. about 80 mm.

[0042] A third embodiment of the invention is shown in Fig. 7 This corresponds to the structure of the absorption body 5 of the first embodiment according to the Fig. 1 to 4 However, the absorption body 5 is arranged on an insulating layer 13, which minimizes the upward heat radiation above the pipe register 6.

[0043] A similar structure is shown as a fourth embodiment of the invention in Fig. 8This corresponds to the structure of the absorption body 5 of the second embodiment according to Fig. 6 However, the absorption body 5 is arranged on an insulating layer 13, which minimizes upward heat radiation above the pipe register 6. In this example, the absorption layer 4 is formed only by individual strips applied between individual pipes of the pipe register 6 on the radiant ceiling panels 2.

[0044] Fig. 9 shows a fifth embodiment of the invention, in which the structure of the absorption body 5 of the second embodiment according to Fig. 6 Similar to the first embodiment of the Fig. 1 to 4 the absorption body 5 is arranged between the pipes of the pipe register 6 on the back of the radiant ceiling panels 2.

[0045] Fig. 10 shows a diagram of the sound absorption coefficient (α s ) of a radiant surface structure according to Fig. 6in solid lines compared to a conventional radiant surface design without an absorption body 5 (dashed line). The sound absorption coefficient was measured as a function of frequency (f) according to ISO 354:2003.

[0046] In this specific application, four radiant ceiling panels were installed at a height of 160 mm above the floor of a hall. The construction of the panels according to the invention essentially corresponded to the construction according to Fig. 6 The absorption body was formed by mineral wool resting on an aluminum sheet, completely enclosed by an LDPE foil. The radiant ceiling panels consisted of a steel sheet with a perforation ratio of 21%.

[0047] As from Fig. 10 As can be seen, the previously described structure made it possible to achieve a considerable sound reduction compared to radiant ceiling panels without absorption bodies, particularly in the frequency ranges up to 2500 Hz.

[0048] In the frequency ranges from 125 to 1600 Hz, compared to the first embodiment according to the Fig. 1 to 4 a significant improvement in noise reduction can be observed, while in the frequency ranges from 2000 to 4000 Hz compared to the first embodiment according to the Fig. 1 to 4 In any case, a slight improvement in noise reduction can be observed.

[0049] In the Figures 5 and 10 The sound absorption coefficient is shown relative to the visible surface of the radiant surface assembly (when installed from below). Values ​​above 1 result from the fact that, among other things, the rear side of the radiant surface assembly also contributes to sound reduction. List of reference symbols:

[0050] 1 Radiant surface structure 2 Ceiling radiant panel 3 Openings 4 Absorption layer 5 Absorption body 6 Pipe register 7 Side panels 8 Film 9 Wall 10 Sound-absorbing material 11 Passage opening 12 Absorption unit 13 Insulation layer MCentre of the beam surface structure

Claims

1. Radiating surface structure for tempering a room with a ceiling radiating panel (2) facing the room to be tempered and with a pipe register (6) through which a heat transfer medium flows, wherein on the side of the ceiling radiating panel (2) facing away from the room to be tempered an absorption layer (4) is provided, wherein on the side facing away from the room to be tempered, additionally a body (5) made of a sound-absorbing material (10) is arranged for sound absorption, wherein the body (5) made of the sound-absorbing material (10) has a wall (9) on at least one side, characterized in that the body (5) and the wall (9) are jointly enclosed by a foil (8), wherein the wall (9) consists of a material which is stiffer than the foil (8) and the foil (8) has an at least partially uneven and / or irregular surface.

2. Radiating surface structure according to claim 1, characterized in that the wall (9) is a metal sheet, preferably an aluminum sheet, and that the wall (9) is arranged on the side facing the radiating surface structure (1).

3. Radiating surface structure according to claim 1, characterized in that the at least one wall (9) is made of cardboard or plastic, in particular corrugated cardboard.

4. Radiating surface structure according to any one of the preceding claims, characterized in that the foil (8) is made of a plastic, in particular low-density polyethylene (LDPE).

5. Radiating surface structure according to any one of the preceding claims, characterized in that the at least one wall (9) is partially provided with through openings (11), in particular with through openings (11) having a diameter of approximately 2 mm to approximately 20 mm, in particular approximately 10 mm, which are arranged in a grid with a spacing of approximately 5 mm to approximately 50 mm, in particular approximately 25 mm.

6. Radiating surface structure according to any one of the claims 1 to 4, characterized in that the at least one wall (9) is closed.

7. Radiating surface structure according to any one of the preceding claims, characterized in that the absorption layer (4) is an insulating- and / or acoustic fleece.

8. Radiating surface structure according to any one of the preceding claims, characterized in that the body (5) consists of insulating wool, in particular mineral wool.

9. Radiating surface structure according to any one of the preceding claims, characterized in that the ceiling radiating panel (2) has openings (3), wherein the ratio of the area of the openings (3) of the ceiling radiating panel (2) to the area of the ceiling radiating panel (2) is greater than approximately 0.05, in particular greater than 0.1.

10. Radiating surface structure according to any one of the preceding claims, characterized in that the ratio of the area of the body (5) to the area of the ceiling radiating panel (2) is greater than 0.05 and less than 0.5, in particular approximately 0.1 to 0.2.

11. Radiating surface structure according to any one of the preceding claims, characterized in that the body (5) is separated from the free edges of the ceiling radiating panel (2), in particular by a distance which corresponds at least to the height of the body (5).