KR102044727B1 - A sound absorbing panel - Google Patents

Abstract

The present invention relates to a panel (2) mounted on a surface inside a building, wherein the panel (2) comprises: a substantially rigid frame (4), the surface disposed on the frame (4) and on which the panel (2) is mounted The front cover 8, which is configured to face away from it, and the first air gap 12 is formed between the one or more sound absorbing elements 10 and the surface and the second air when the panel 2 is mounted to the surface. The gap 14 comprises one or more sound absorbing elements 10 disposed in the frame 4 in a manner formed between the one or more sound absorbing elements 10 and the front cover 8, the panel 2 being additional And a means for providing a first air passage 18 between the furnace first air gap 12 and the second air gap 14 and an air flow through the first air passage 18.

Description

Sound absorption panel {A SOUND ABSORBING PANEL}

FIELD OF THE INVENTION The present invention relates to panels that can be used to cover the interior surfaces of buildings, for example auditoriums, open offices, etc., and in particular heat storage systems which are well known in the art for balancing acoustic and thermal comfort. A panel suitable for use in buildings with activated building systems (TABS).

Fields such as architecture and interior design generally require panels to cover interior boundaries, such as ceilings, walls, or partitions placed indoors. Such panels may serve only for purely aesthetic purposes, but may also be used, for example, to actively alter the characteristics of the room with respect to the acoustic and thermal properties of the room.

In general, panels used to determine acoustical properties of a room include a frame structure that supports a plate formed of sound absorbing material, such as mineral wool, gypsum or a thin wood membrane. While the panel can suggest a very good solution in terms of acoustic control of the room, few attempts have been made to optimize the thermal properties of the panel, such as thermal transparency, and in fact are very difficult to optimize. The problem with known panels is that they optimize the overall comfort of the room and, therefore, use the panels to optimize the acoustic and thermal properties together.

US 4,330,046 describes a sound barrier panel. The sound barrier is for isolating the type of noise source from the food preparation area. The soundproof wall comprises a panel made of a sound attenuating material, the panel having a plurality of longitudinal parallel extensions separated by V-shaped ribs to form a plurality of longitudinal parallel extending cavities. To have a coplanar section. The cavity is provided with a sound absorbing material therein so that sound waves from the noise source are first absorbed by the sound absorbing material, and then partially weakened by the panel and partly deflected and absorbed again by the sound absorbing material. The panel is preferably transparent, and at least some portion of the cavity can remain without sound absorbing material to provide an undistorted vision from one side of the panel to the opposite side. The soundproof wall is designed such that the open side of the cavity faces the noise source. Alternatively, the cavities are separated by flat panel sections instead of V-shaped ribs, which sections have no sound absorbing material to provide a non-distorted appearance of the sections therethrough.

US 2009/0178882 describes another sound panel, the so-called acoustic panel, and discloses a method in which the enhanced acoustic panel comprises sound absorbing members formed of first and second surfaces and a plurality of peripheral edges. The sound blocking member is formed with the first and second surfaces and the plurality of peripheral edges. The first surface of the sound blocking member is fixed relative to the second surface of the sound absorbing member to block sound transmission through the surface. In another embodiment, the first surface of the sound blocking member is spaced apart from the second surface of the sound absorbing member to decoupling the sound blocking member from the sound absorbing member.

The problem with the panels described above is that the panels have not only sound absorption but also thermal insulation, and the panels generally make the concrete heat storage system practically useless in buildings where the ceiling is water cooled.

In order to balance the acoustic and thermal comfort of a building, in particular a building with a Sphere Thermal Storage System (TABS), the applicant of the present application in EP 2 444 561 does sound dampening, The panel includes a substantially rigid frame, a front face and a rear face, one or more sound absorbing elements, and a subregion that acoustically connects the rear face of the panel with the front face of the panel, wherein no sound absorbing element is present in the subregion, The subregion thus ensures heat transfer through the panel, the panel comprising a bracket providing a receptacle for the sound absorbing element with the frame portion, the bracket providing access to the sound field towards the side of the sound absorbing element. A hole for providing includes a central portion provided.

In many practical situations, however, it has been demonstrated that the above-described panels harm the operation of TABS due to the insulating properties of the sound absorbing region. Accordingly, the Applicant has recognized that there is a need to modify the panel to provide an optimal balance between sound absorption and disturbance of TABS operation.

It is therefore an object of the present invention to provide an improved panel.

According to the present invention, the above and other objects are achieved by a panel mounted on a surface inside a building, the panel comprising: a substantially rigid frame, positioned away from the surface on which the panel is mounted and mounted. A front cover configured to be oriented, and when a panel is mounted to the surface, a first air gap is formed between the at least one sound absorbing element and the surface and a second air gap is formed between the at least one sound absorbing element and the front cover. And at least one sound absorbing element disposed in the frame, the panel further comprising a first air passage between the first air gap and the second air gap and an airstream through the first air passage. It also includes means for providing.

During use, the surface on which the panel is mounted will cool (or heat up) the air in the first air gap to substantially the same temperature as the surface itself, and provide a means for providing airflow through the first air passage. The cooling air will be transferred to the second air gap, thus cooling the front cover (and one or more sound absorbing elements). Thus, the front cover of the panel will be at the same temperature as the surface on which the panel is to be mounted (for example the ceiling). Thus, since the temperature condition present on the surface on which the panel is mounted is "moved" to the front cover of the panel, it will not deteriorate the comfort experienced in the room where the panel of the present invention is mounted. As a result, a sound absorbing panel having heat permeability is formed. This is an enormous advantage, for example, in buildings in which a ceiling heat storage system (TABS) is used. Until now, it has been virtually impossible to provide satisfactory sound attenuation in such rooms due to the thermal insulation properties of conventional sound absorbing panels, so such rooms have carpets on the floor, for example to suppress at least negative backscattering of the floor. It just led to less satisfactory solutions such as those used.

In a preferred embodiment of the panel according to the invention, the at least one sound absorbing element is formed in the shape of a box. This results in a good practical solution which is particularly suitable for building several panels together to form one large unit.

In one embodiment of the panel according to the invention, the sound absorbing element is made of inorganic fibers such as glass or rock wool but is made of melamine foam, glass fabric, cellulose (paper) based material, ceramic materials or other breathable materials. It may be. Sound absorbing elements may also be made of a membrane or porous material, acting as a membrane or resonance absorber.

In another preferred embodiment of the panel according to the invention, the dimensions of the one or more sound absorbing elements are selected in accordance with the lowest frequency at which substantial sound absorption will occur.

In another preferred embodiment of the panel according to the invention, the thickness of the at least one sound absorbing element is in the range of 20 mm to 100 mm, the thickness range being for absorbing undesirable reverberation of noise and sound in the audible frequency range. Proved particularly good.

In a preferred embodiment of the panel according to the invention, the front cover is a sheet of flexible material, for example a woven textile material. Preferably, the front cover is subjected to a tension, for example, which is independent of changes in temperature and humidity of the surrounding environment and aging effects of the front cover material itself.

In another preferred embodiment of the panel according to the invention, the front cover has a material or structure which allows air to diffuse through the front cover, whereby heat exchange between the surface on which the panel is mounted and the surrounding environment allows for air transfer. Further improvement due to heat exchange through.

In another embodiment the frame of the panel further comprises a hole at each of the ends of the frame located farthest from the first air passageway between the first and second air gaps, the hole being disposed on the frame. Air flows from the circumference of the panel directly towards the first air gap to compensate for air diffusing in the second air gap through the front cover.

Advantageously, said first air passage is arranged at the center of the panel.

Preferably, the panel is of elongate shape with a longitudinal axis of length longer than the abscissa. The panel may have any of the following shapes: box shape, egg shape or oval shape.

In another preferred embodiment, the panel further comprises additional second and third air passages between the first and second air gaps, each of the second and third air passages being located farthest from the first reservoir. Located at each end of the panel located. This allows for forced air circulation, where air is forced through the first air passage from the first or second air gap, and additionally through the two second and third air passages towards the first air passage. Flow. In this way, the flow of air will be forced to move substantially along both the surface of the sound absorbing element as well as on the back side of the front cover, thereby achieving very effective cooling of the front cover (and one or more sound absorbing elements).

In a practical embodiment of the panel according to the invention, each of the second and third air passages is provided with a gap between the frame and one or more sound absorbing elements. This ensures that the air flows over substantially all of the inside of the front cover, which results in a very effective temperature exchange with the front cover.

In another embodiment of the panel according to the invention, the first air passage is arranged adjacent to the frame of the panel, the panel further comprising a second air passage between the first and second air gaps, the second An air passage is provided adjacent to the frame portion located farthest from the first air passage.

In a preferred embodiment of the panel, the frame completely surrounds the edge of the panel. This allows the front cover to be attached to the frame so that the front cover is tensioned.

In another preferred embodiment of the panel according to the invention, the width of the first air gap formed by the distance between the at least one sound absorbing element and the surface when the panel is mounted to the surface is between 10 mm and 25 mm.

In another preferred embodiment of the panel according to the invention, the width of the second air gap formed by the distance between the at least one sound absorbing element and the front cover is between 8 mm and 15 mm.

Preferably, by adjusting the speed of the air flow through the first air passage, using a minimum amount of energy, the temperature in the second air gap can be continuously made to be close to the temperature of the surface on which the panel is mounted. .

In another preferred embodiment of the panel according to the invention, the means for providing airflow through the first air passage is a fan disposed in or adjacent to the first air passage. Such a fan can be connected to the power grid in a conventional manner, for example via a transformer built into the panel. The fan is low energy consumption and can be nearly silent, so that the acoustic environment of the room in which the panel of the invention is used is not deteriorated even if the fan is applied as a means for providing the airflow through the first air passage. You can use special built-in fans or off-the-shelf fans such as those used to cool various parts of your computer. The fan is fixed and can be configured to operate with a predefined effect.

In another preferred embodiment of the panel according to the invention, the panel comprises means (for example two temperature sensors) for monitoring the temperature difference between the air in the two air gaps.

In another preferred embodiment of the panel according to the invention, the panel is additionally arranged adjacent to or on the same side of one or more sound absorbing elements at two different distances from the first air passage in the direction of air flow. Two temperature sensors, said temperature sensor being connected to a controller, said controller being operatively connected to said fan. This allows the temperature difference between the two air gaps to be monitored in a very practical way, since if the front cover (and sound absorption element) and the surface temperature are nearly even, there will be virtually no difference in the two measurements. . Therefore, the difference in temperature measurement can be used to control the fan.

Thus, in another embodiment of the panel according to the invention, the controller is configured to compare the temperature measurements measured from the two temperature sensors and to adjust the operation of the fan according to the comparison values. The comparison may for example be a calculation of the ratio.

However, in another embodiment of the panel according to the invention, the comparison is a calculation of the difference (e.g. the difference in numerical values) of the temperature measurements measured from the two temperature sensors, the fan being in the following manner, i.e.

Increasing the airflow through the first air passageway between the first and second air gaps if the difference is above a predefined threshold, or

The flow of air through the first air passage between the first and second air gaps is adjusted in such a way as to decrease if the difference is below a predefined threshold.

In another embodiment of the panel according to the invention, the comparison is a calculation for the numerical difference of temperature measurements measured from two temperature sensors, wherein the fan is

Turn the fan on or remain on if the difference is above a predefined threshold, or

The fan is adjusted in such a way as to turn off or remain off if the difference is below a predefined threshold.

This results in a power saving mode of operation and the fan only runs when needed.

In another preferred embodiment of the panel according to the invention, the surface on which the panel is mounted forms part of a sphere heat storage system. Due to the forced air flow between the first and second air gaps the sound absorbing element will not function adiabaticly, so that the panel according to the invention is particularly suitable for use in connection with TABS, for example in water cooled roofs or ceilings. It becomes suitable.

In another embodiment of the panel according to the invention, the surface on which the panel is mounted is a ceiling or a wall.

In another embodiment of the panel according to the invention, the controller is also operatively connected to the sphere heat storage system.

Further understanding of the features and advantages of the present invention may be made with reference to the remainder of the specification and the drawings. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
1 shows an embodiment of a panel according to the invention.
2 is a cross-sectional view of the embodiment of the panel illustrated in FIG. 1.
3 shows another embodiment of a panel according to the invention.
4 shows another embodiment of a panel according to the invention.
5 shows another embodiment of a panel according to the invention.
6 is a cross-sectional view of another embodiment of a panel according to the invention.

The invention will now be described in detail below with reference to the accompanying drawings, in which embodiments of the invention are shown. However, the invention may be embodied in other forms and should not be construed as limited to the embodiments set forth herein. Rather, the embodiments herein are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like reference numerals refer to like elements throughout. Thus, similar elements will not be described in detail in connection with the description of each figure.

1 and 2, FIG. 1 shows and shows a panel 2 according to the invention from above, and FIG. 2 shows and shows from the side. In FIG. 2, the panel is mounted to the ceiling 6 inside the building. The illustrated panel 2 comprises a substantially rigid frame 4 and a front cover 8 disposed on the frame 4, the front cover 8 having a surface on which the panel 2 is mounted ( For example, facing away from the ceiling 6. In addition, when the panel 2 is mounted to the ceiling 6, a first air gap 12 is formed between the sound absorbing element 10 and the ceiling 6 and the second air gap 14 is formed of the sound absorbing element ( In a manner formed between 10 and the front cover 8, the panel 2 comprises sound absorbing elements 10 arranged in the frame 4. The illustrated panel further includes a fan 16 disposed in the first air passage 18 between the first air gap 12 and the second air gap 14. The fan 16 is configured to provide airflow through the first air passage 18. The fan 16 may be connected to the power grid in a conventional manner, for example via a transformer built into the panel 2. In the illustrated embodiment the first air passage 18 is arranged in the center of the panel 2.

The panel 2 shown in FIGS. 1 and 2 additionally comprises additional second and third air passages 20, 22 between the first and second air gaps 12, 14. Each of the third air passages 20, 22 is provided with a gap between the frame 4 and the absorbent element 10. This allows for forced air circulation, where air is forced from the first air gap 12 through the first air passage 18, and additionally the first air passage 18 again as indicated by the arrow. It flows through the two second and third air passages 20 and 22 toward each other. In this way, the flow of air will be forced to move substantially along both the surface of the sound absorbing element 10 as well as on the back side of the front cover 8 and thus on the front cover 8 (and sound absorbing element 10). Very effective cooling is achieved even when the ceiling 6 is cooled, for example by TABS. The gap between the frame 4 and the sound absorbing element 10 places the second and third air passages 20, 22 at the ends of the panel 2 located farthest from the first air passage 18, thereby providing air Is ensured to flow over substantially all parts of the inner side of the front cover 8, so that a very effective temperature exchange with the front cover 8 is achieved.

During use, the ceiling 6 cools the air in the first air gap 12 to a temperature substantially the same as the ceiling 6 itself, and provides a fan for providing airflow through the first air passage 18. By providing 16, the cooling air is transferred to the second air gap 14, thus cooling the front cover 8 (and sound absorbing element 10). The front cover 8 of the panel 2 will thus be at the same temperature as the ceiling 6 on which the panel 2 is mounted. Thus, since the temperature condition present on the surface (ceiling 6) on which the panel 2 is mounted is "moved" to the front cover 8 of the panel 2, the room in which the panel 2 of the present invention is mounted. Will not deteriorate the comfort experience. Thereby, the sound absorption panel 2 which has heat permeability is formed. This is a tremendous advantage, for example, in buildings in which a spherical heat storage system (TABS) with ceiling 6 cooling is used. Until now, it has been virtually impossible to provide satisfactory sound attenuation in such rooms due to the thermal insulation properties of conventional sound absorbing panels, so such rooms have carpets on the floor, for example to suppress at least negative backscattering of the floor. It just led to less satisfactory solutions such as those used.

The front cover 8 is a sheet of flexible material, for example a woven fabric material. Preferably, the front cover 8 is subjected to tension, for example, independent of changes in temperature and humidity of the surrounding environment and aging effects of the front cover material itself. The frame 4 completely surrounds the edge of the panel 2. Thus, the front cover 8 can be attached to the frame 4 so that the front cover 8 can be tensioned.

The illustrated sound absorbing element 10 is formed substantially in a box shape. This results in a good practical solution which is particularly suitable for building several panels 2 together to form one large unit. The sound absorbing element 10 is preferably made of inorganic fibers such as glass or rock wool, but may also be made of melamine foam, glass fabric, cellulose (paper) based material, ceramic material or other breathable material. Sound absorbing elements may also be made of a membrane or porous material, acting as a membrane or resonance absorber. The thickness of the sound absorbing element 10 is preferably in the range of 20 mm to 100 mm, which has proved to be particularly good for absorbing reverberations of noise and sound in the 300 Hz to 3500 Hz frequency range.

In the illustrated embodiment, the width of the first air gap 12, which is formed by the distance between the sound absorbing element 10 and the ceiling 6, is approximately 10 mm to 25 mm, and the sound absorbing element 10 and the front cover 8 are provided. The width of the second air gap 14 formed by the distance between is 8 mm to 15 mm.

Preferably, by adjusting the speed of the air flow through the first air passage 18, using a minimum amount of energy, the temperature in the second air gap is continuously made to be close to the temperature of the surface on which the panel is mounted. can do.

3 shows another embodiment of a panel 2 according to the invention. The illustrated panel 2 includes two temperature sensors 24, 26 for monitoring the temperature difference between the air in the two air gaps 12, 14. The two temperature sensors 24, 26 are arranged at two different distances from the first air passage 18 in the direction of the flow of air (as indicated by the arrow) on the same side of the sound absorbing element 10. The temperature sensors 24, 26 are connected to a controller 28, which is operatively connected to the fan 16. This allows the temperature difference between the two air gaps 12, 14 to be very real, since if the temperatures of the front cover 8 and the ceiling 6 have become nearly equal, there will be virtually no difference in the two measurements. It is monitored in a regular way. Thus, the difference in temperature measurement can be used to control the fan 16.

In one embodiment of the panel 2 according to the invention, the controller 28 calculates the difference (e.g. the difference in the numerical value) of the temperature measurements measured from the two temperature sensors 24 and 26, Way, that is,

-Increase the air flow through the first air passage 18 between the first and second air gaps 12, 14 if the difference is above a predefined threshold, or

The fan 16 in a manner that reduces the air flow through the first air passage 18 between the first and second air gaps 12, 14 if the difference is below a predefined threshold. Adjust

In another embodiment of the panel 2 according to the invention, the controller 28 calculates the difference (e.g. the difference in the numerical value) of the temperature measurements measured from the two temperature sensors 24, 26, as follows. Way, that is,

Turn the fan 16 on or remain on if the difference is above a predefined threshold, or

-Control the fan 16 in such a way that the fan 16 is switched off or remains off if the difference is below a predefined threshold.

This results in a power saving mode of operation and the fan 16 only operates when needed.

In another embodiment of the panel 2 according to the invention, the controller can be operatively connected to a sphere heat storage system.

4 shows another embodiment of a panel 2 according to the invention having an elliptical shape.

5 shows another embodiment of the present invention, where the first air passage 18 is arranged adjacent to the frame 4 of the panel, and the panel 2 additionally additionally includes the first and second air. A second air passage 30 is provided between the gaps 12, 14, the second air passage 30 being provided adjacent to a portion of the frame 4 located farthest from the first air passage 18. .

6 is a cross-sectional view of another embodiment of a panel 2 mounted to the ceiling 6. The illustrated panel 2 is substantially similar to the panel 2 illustrated in any of FIGS. 1 to 3. Therefore, only different parts will be described. In the illustrated panel 2, the front cover 8 has a material or structure that allows air to diffuse through the front cover, as indicated by the arrow going through the front cover 8, thereby providing a panel 2. The heat exchange between the ceiling 6 on which is mounted) and the surrounding environment is further improved due to the heat exchange through the air transport. The frame 4 of the illustrated panel 2 additionally comprises the ends of the frame 4 located farthest from the first air passage 18 between the first air gap 12 and the second air gap 14. Each includes a hole 32. These holes 32 allow air to flow from the circumference of the panel 2 directly towards the first air gap 12 to replenish air that diffuses in the second air gap 14 through the front cover 8. It is arranged on the frame 4.

Test result

Panels according to the embodiment illustrated in FIG. 1 were tested and compared to panels without fans to evaluate the thermal conductivity properties associated with TAB ceilings. The test was carried out by the independent German company HLK Stuttgart GmbH. The test showed that in the absence of a fan, the acoustic element had a 41% reduction in heat transfer through the panel. However, if using a 12 mm diameter, CMP-Fan 25 type fan, manufactured by Konic Electronics, for example, as shown in Figures 1 and 2, the heat transfer rate was reduced by only 10%, thus It became a virtually heat-permeable panel according to the invention.

Below is a list of reference numbers used in the detailed description of the invention.
2 panels
4 frames
6 ceiling
8 front cover
10 acoustic elements
12 first air gap
14 second air gap
16 fans
18 1st air passage
20, 30 2nd air passage
22 Third Air Path
24, 26 temperature sensor
28 controller
32 holes in the frame

Claims (27)

A sound absorbing panel (2) mounted on a surface inside the building, the surface forming part of a sphere heat storage system (TABS), the panel (2):
Substantially rigid frame 4,
A front cover 8 disposed on the frame 4 and configured to face away from the surface on which the panel 2 is mounted, and
As at least one sound absorbing element 10, when the panel 2 is mounted to the surface, a first air gap 12 is formed between the at least one sound absorbing element 10 and the surface, and the front with the at least one sound absorbing element 10. One or more sound absorbing elements disposed in the frame 4 in such a way that a second air gap 14 is formed between the covers 8,
The panel 2 has a first air passage 18 and the first air passage 18 extending through the one or more sound absorbing elements 10 between the first air gap 12 and the second air gap 14. Means for providing an airflow between the first air gap 12 and the second air gap 14 through 18), wherein the means for providing airflow through the first air passage comprises: a first air gap; A fan 16 disposed in or adjacent to the air passage 18,
The panel 2 further comprises additional second and third air passages 20, 22 between the first and second air gaps 12, 14,
Air forcibly flows from the first or second air gaps 12, 14 through the first air passage 18 and back through the second and third air passages 20, 22 toward the first air passage 18. Each of the second and third air passages 20, 22 are disposed at each end of the panel 2 located farthest from the first air passage 18 to achieve a forced forced air circulation.
Panel (2). The panel (2) according to claim 1, wherein said at least one sound absorbing element (10) is formed in a box shape. 3. The sound absorbing element (10) according to claim 1 or 2, wherein the sound absorbing element (10) is any of inorganic fibers such as glass or rock wool, melamine foam, glass fabric, cellulosic material, ceramic material, membrane or porous material acting as a membrane or resonance absorber. Panels (2) made from the material of. The panel (2) according to claim 1 or 2, wherein the dimensions of the one or more sound absorbing elements (10) are selected in accordance with the lowest frequency at which sound absorption can occur. The panel (2) according to claim 4, wherein the thickness of the at least one sound absorbing element (10) is in the range of 20 mm to 100 mm which substantially absorbs noise in the audible frequency range. The panel (2) according to claim 1 or 2, wherein the front cover (8) is a sheet of flexible material. The panel (2) according to claim 1 or 2, wherein the front cover (8) has a material or structure which allows air to diffuse through the front cover. And further comprising a hole (32) at each of the ends of the frame (4) located farthest from the first air passage (18) between the first and second air gaps (12, 14). The hole 32 allows air to flow from the circumference of the panel 2 directly towards the first air gap 12 to compensate for air diffusing in the second air gap 14 through the front cover 8. Panel 2 disposed on frame 4. The panel (2) according to claim 1 or 2, wherein the first air passage (18) is arranged at the center of the panel (2). The panel (2) according to claim 1 or 2, wherein the panel (2) has an elongated shape having a longitudinal axis of a length longer than the horizontal axis. The panel (2) according to claim 10, wherein the panel has any of a box shape, an egg shape or an elliptical shape. delete The panel (2) according to claim 1, wherein each of said second and third air passages (20, 22) is provided with a gap between said frame (4) and said at least one sound absorbing element (10). 3. The first air passage (18) according to claim 1 or 2, wherein the first air passage (18) is arranged adjacent to the frame (4) of the panel (2), and the panel (2) is provided with the first and second air gaps (12). 14, further comprising a second air passage 30, wherein the second air passage 30 is provided adjacent to a portion of the frame 4 located farthest from the first air passage 18. ). The panel (2) according to claim 1 or 2, wherein the frame (4) completely surrounds the edge of the panel (2). The width of the first air gap 12 defined by the distance between the at least one sound absorbing element 10 and the surface when the panel 2 is mounted to the surface is between 10 mm and 25 mm. Panel (2). The panel (2) according to claim 1 or 2, wherein the width of the second air gap (14) formed by the distance between the one or more sound absorbing elements (10) and the front cover (8) is between 8 mm and 15 mm. The speed of airflow through the first air passage 18 according to claim 1 or 2, so that minimal energy is used while still achieving a temperature in a second air gap close to the temperature of the surface on which the panel is mounted. Panel (2). The panel (2) according to claim 1 or 2, wherein the fan (16) is configured to operate with a fixed, predefined effect. 3. The panel according to claim 1, wherein the panel (2) is adjacent or identical to the same side of the at least one sound absorbing element (10) at two different distances from the first air passage (18) in the direction of air flow. Further comprising two temperature sensors 24, 26 disposed thereon, the temperature sensors 24, 26 being connected to a controller 28, the controller 28 being operatively connected to a fan 16. Panel (2). The panel 2 according to claim 20, wherein the controller 28 is configured to compare the temperature measurements measured from the two temperature sensors 20, 22 and to adjust the operation of the fan 16 in accordance with the comparison numerical values. . The method of claim 21, wherein the comparison is a calculation of the numerical difference of temperature measurements measured from two temperature sensors 24, 26,
The fan 16
If the difference is above a predefined threshold, increase the airflow through the first air passage 18 between the first and second air gaps 12, 14, or
A panel (2) adjusted in such a way as to reduce the air flow through the first air passage (18) between the first and second air gaps (12, 14) if the difference is below a predefined threshold. The method of claim 21, wherein the comparison is a calculation of the numerical difference of temperature measurements measured from two temperature sensors 24, 26,
The fan 16
Turn the fan 16 on or remain on if the difference is above a predefined threshold, or
A panel (2) adjusted in such a way as to turn the fan (16) off or remain off if the difference is below a predefined threshold. The panel (2) according to claim 1 or 2, wherein the surface on which the panel is mounted is a ceiling (6) or a wall. The panel (2) according to claim 20, wherein said controller (28) is also operatively connected to a sphere heat storage system. delete delete

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