FR3069261A1 - MODULAR RADIATION ELEMENT AND METHOD FOR MANUFACTURING SUCH A MEMBER - Google Patents

Abstract

The invention relates to a modular ceiling or wall radiating element (1) for heating and / or cooling of a building room and a radiating system comprising a plurality of these elements. The modular radiant element comprising a pipe (11) allowing passage of a heat transfer fluid to its interior, and a copper or aluminum plate (12) welded to the pipe. The modular radiating element (1) further comprises a covering plate (14) covering the copper or aluminum plate, the covering plate (14) comprising through holes (140) dimensioned so as to pass through The invention also relates to a method of manufacturing the modular radiating element.

Description

Modular radiating element and method of manufacturing such an element

Technical Field The present invention relates to a radiant ceiling or wall system for heating and / or cooling a building room by radiation and by convection.

STATE OF THE ART [0002] The creation and maintenance of a pleasant and healthy environment in the premises of a building makes it possible to carry out commercial or private activities in a suitable manner throughout the year. In particular, the creation and maintenance of predefined temperature conditions in a room makes it possible to reduce seasonal inconveniences and to react quickly to variations in thermal loads. The radiant ceiling is the only heating / cooling system that allows minimal air mixing, and therefore dust. This has a very positive effect on health.

[0003] At the end of the 1990s, the first administrative buildings were equipped with radiant ceilings, first for cooling, then also for heating. More recently, this technique is used in different types of buildings. Because of its installation price, other air conditioning techniques are still widespread, although radiant ceilings are more energy efficient and provide greater comfort.

Document DE102009055443 describes an element for a ceiling or wall comprising a sound-absorbing material surrounding the pipes in which a heat transfer fluid circulates.

Document EP2210992 describes a prefabricated thermoactive plate configured to force the passage of ambient air through

ENERGI-1-FR of a channel so as to control its temperature by heat exchange with heat transfer fluid.

Document US2005 / 0040152 describes a thermoactive element for air conditioning and heating a room comprising a lamellar structure thermally connected to a pipe through which a heat transfer agent passes. The voids created by the lamellar structure are filled with a sound-absorbing material while the ends of the structure are connected with a metallic radiant plate.

Document EP2762787 describes an air conditioning element comprising an aluminum radiant plate and a layer of non-woven sound-absorbing material. The radiant plate is thermally connected to pipes through which a heat transfer agent passes by welding a plurality of intermediate aluminum plates, each intermediate plate being previously welded to a straight portion of a pipe.

BRIEF SUMMARY OF THE INVENTION An object of the present invention is to provide a radiant system for the creation and maintenance of determined temperature conditions in the premises of a building, which is of easy realization and installation, provided with: '' a pleasant aesthetic and at a competitive price, compared to known radiant systems.

A particular object of the invention is to provide a radiant system for heating or cooling the room with very high efficiency and homogeneity.

Another object of the invention is to provide a radiant system which also makes it possible to reduce the propagation of noise pollution in the premises.

ENERGI-1-FR [0011] According to the invention, these aims are achieved in particular by means of a modular radiant element for the ceiling or wall of a building room, the modular radiant element comprising:

a pipe, preferably in the form of a serpentine, capable of being connected to a distribution pipe of a building and / or to a pipe of another modular radiating element so as to allow a passage of a heat transfer fluid inside ;

a copper or aluminum plate being connected to said pipe by means of a solder; and a covering plate covering said copper or aluminum plate, said covering plate comprising through holes (and / or notches) dimensioned so as to allow sound waves to pass through the covering plate.

This solution has the particular advantage of improving the heat exchange between the heat transfer fluid and the surface of the suspended ceiling (false ceiling) or the false wall of a building room, thanks to on the one hand the best thermal conductivity between the radiant plate and the pipe and on the other hand to the covering plates forming the suspended ceiling or the false wall, while limiting the production and installation costs of a radiant system.

The perforations of the cover plate allow indeed, not only an embodiment of a suspended ceiling or a false wall with a pleasant or suitable aesthetic place, but also a reduction of noise pollution by allowing passage sound waves towards a sound-absorbing layer close to the ceiling or wall, making the solution economically viable.

According to the invention, the objects of the invention are further achieved by a method of manufacturing a modular radiating element of the ceiling or wall for heating and / or cooling a building room, comprising the stages of:

ENERGI-1-FR welding of a copper or aluminum plate to a pipe configured to allow passage of a heat transfer fluid inside;

and covering said copper or aluminum plate with a covering plate, said covering plate comprising through holes dimensioned so as to allow sound waves to pass through the covering plate.

According to the invention, the objects are further achieved by a radiating system for ceiling or wall of a building room comprising a plurality of these modular radiating elements.

The modular approach makes it possible to respond efficiently and quickly to the sizing requirements of the system, contributing to the reduction of the manufacturing and installation costs of the radiant system.

Brief description of the figures Examples of implementation of the invention are indicated in the description illustrated by the appended figures in which:

FIG. 1 illustrates an example of a radiant system which can be assembled from modular radiant elements, according to the invention;

FIG. 2 illustrates an example of a modular radiant element, according to the invention;

Figure 3 illustrates a sectional view of a pipe with fins inside fitted to the modular radiant element of Figure 2;

FIG. 4 illustrates details of an assembly of modular radiant elements, the latter illustrated without their sound-absorbing layer.

ENERGI-1-FR

Example (s) of embodiment of the invention [0018] Figures 1-4 illustrate a modular radiating element 1 for a radiating system 100 of ceiling or wall intended for the heating and / or cooling of a room of a building by radiation and by thermal convention.

The modular radiating element 1 firstly comprises a pipe 11 in the form of a serpentine, the free ends 11, 112 of which are connectable to a building distribution pipe and / or to a pipe of another radiating element modular so as to allow passage of a heat transfer fluid inside. The modular radiating element 1 comprises a copper or aluminum plate 12 connected to said pipe 11, along the area of the wall of the pipe 11 in contact with the plate 12, and configured to allow heat exchange with a suspended ceiling or a false wall of the room. This plate 12 can be full, that is to say non-perforated, or else perforated (having openings) as will be described later.

The modular radiating element 1 then comprises a covering plate 14 covering the copper or aluminum plate 12 so that the suspended ceiling (generally metal ceiling) or the false wall results from a juxtaposition of a plurality of these covering plates 14.

The cover plate 14 is generally made of metal and comprises a substantially flat external surface, and is also called "metal tray". The external surface of the covering plate, or possibly the whole of the covering plate, is treated so as to obtain a pleasant aesthetic and suitable for the place of installation.

The cover plate 14 is perforated so as to allow a passage of sound waves through the layer so as to guarantee an attenuation of noise nuisance by means of a sound-absorbing layer, while ensuring a pleasant aesthetic.

ENERGI-1-FR The sound-absorbing layer can be a layer (pre-existing or installed separately) of the ceiling or of the wall or resulting from the use of a material having sound-absorbing properties for the realization of the ceiling or the wall. Advantageously, the modular radiating element 1 further comprises a sound-absorbing layer 10 covering (or covering) the copper or aluminum plate 12 on the side of the ceiling or of the wall when the modular radiating element 1 is mounted therein, so as to create and maintain sound attenuation parameters within predefined value ranges.

The sound absorbing layer 10 can be dimensioned so as to be housed between the curves of the coil.

Alternatively, the sound-absorbing layer 10 can be dimensioned so as to cover (or cover) not only the copper or aluminum plate but also (at least part of) the coil 11.

Thus, the addition to the perforated cover plate 14 (or metal ceiling plate, or metal tray) of the assembly formed by the copper or aluminum plate 12 and the pipe or pipes (x) 11 connected by welding, makes it possible to add a thermal regulation function to the sound absorption function of the plate 14, which has thus become a plate qualified as “activated plate”.

The Applicant has surprisingly discovered that the modular radiating element having a plate 12 of copper or aluminum welded to the pipe makes it possible to offer efficient heat exchange between the heat transfer liquid and the suspended ceiling of the premises, while limiting the (additional) final price of the radiating system compared to known systems.

Indeed, manufacturers of radiating systems are indeed reluctant, see opposite, to use copper in their systems, although copper is known for its optimal thermal conductivity, because of its excessive cost compared to other thermally conductive materials,

ENERGI-1-FR like aluminum. The use of copper in radiating systems is thus currently excluded from the choice of materials for the production of large elements, in particular for the radiating plate.

The Applicant has thus noticed that, thanks to the high thermal efficiency of the preferred solution resulting from the use of copper for the production of the radiating plate 12, as well as a thermal bond by welding between the plate 12 and the pipe 11 allows a greater perforation of the plate 12. The holes 120 passing through the perforated plate 12 are thus dimensioned, not only to let the sound waves pass to a sound-absorbing layer 10, but also to further reduce the copper supply for the manufacture of the perforated copper plate 12.

The holes 120 can be sized and distributed, in a homogeneous or inhomogeneous manner, on the copper plate 12 so as to optimize the ratio between the costs of using copper and the heat transfer capacity from the heat transfer fluid of the modular radiant element 1 and the ambient air of the room and / or the objects located opposite or near the modular radiant element 1.

As illustrated in Figure 2, the total area formed by the through holes 140 of the cover plate 14 may be less than the total area formed by the through holes 120 of the copper plate

12. Indeed, the holes 140 of the covering plate are intended to let the sound waves pass while guaranteeing a pleasant aesthetic appearance, while the through holes 120 of the copper plate are intended in the first place to reduce the copper input from the radiant plate 12. The through holes 140 of the covering plate can thus have sizes (diameters) smaller than the size of the through holes 120 of the copper perforated plate 12. Secondarily, in the case of a copper plate 12, the holes through 120 also make it possible to pass sound waves through the perforated copper or aluminum plate 12 towards a sound-absorbing layer 10.

ENERGI-1-FR Advantageously, the through holes 120 (and / or notches) represent between 0% and 40% of the surface of the perforated copper plate 12, preferably between 15 and 30%, and more preferably between 20 and 25%, and preferably of the order of 25%. Furthermore, preferably the perforated copper plate 12 has a thickness between 0.1 mm and 2 mm, preferably between 0.1 mm and 0.4 mm, and advantageously a thickness of the order of 0.2 mm.

The through holes 120 of the copper or aluminum plate can take different forms, eg. ex. a round, circular, oval, square, rectangular, polygonal shape.

The through holes 120 of the copper or aluminum plate 12 located in regions further from the welds 20 may have a larger dimension and / or be more numerous per unit area, compared to those of the portions in proximity welds. Thus, for example, the through holes of the copper or aluminum plate are distributed and / or dimensioned in a non-uniform manner, preferably as a function of a distance from said weld 20.

The through holes 120 of the copper or aluminum plate 12 located in regions covered by the upstream portion of the pipe 11 may have a smaller dimension and / or be less numerous per unit area, compared to those of regions covered by the downstream portion of the pipe 11. The upstream portion of the pipe 11 corresponds to the portion of the pipe 11 crossed first by the heat transfer fluid (hot or cold), and before the downstream portion of the pipe.

The pipe (coil 11) of the modular radiating element can be configured to improve the heat transfer between the heat transfer fluid and the suspended ceiling of the room, in particular through one or more grooves and / or one or more protuberances (eg: in the form of fins) on the internal face of its wall, thus making it possible to increase the heat exchange surface between the wall of the pipe 11 and the heat transfer fluid which flows through it.

ENERGI-1-FR [0037] Figure 3 illustrates an embodiment of the pipe (coil 11) comprising a series of grooves 110, in particular parallel grooves, creating fins on the surface of the internal wall of the pipe so as to increase the contact and heat exchange surface between the fluid and the pipe 11.

Advantageously, the groove 110 (and its complementary rib) is helical so as to generate turbulence facilitating the passage of the fluid through the pipe 11, while improving its heat transfer.

In order to further improve the efficiency of the heat exchange between the pipe (coil) 11 and the plate 12 made of copper (or aluminum), the pipe can be made of copper in order to allow thermal bonding by welding without material input.

The realization of a radiating system 100 by means of a modular radiating element 1 further facilitates its manufacture and installation thanks to a modular approach, helping to make the solution economically competitive. Thus, one can form a radiating system (100) for ceiling or wall of a building room comprising a plurality of modular radiating elements 1 as described in the present text.

The perforated copper plate 12 is thermally connected to the pipe with or without fins inside (coil 11) by means of at least one weld 20 resulting from a welding operation without or with the addition of material (brazing ).

Welding makes it possible to obtain better continuity between the assembled materials (directly or by the material supplied), which generates a more efficient thermal bond than that obtained by mechanical assembly techniques or by adhesion.

Advantageously, the modular radiating element 1 further comprises an acoustic veil 13 which also optionally acts

ENERGI-1-FR from dust retention veil. This acoustic veil 13 is positioned between the covering plate 14 and the copper or aluminum plate 12.

The acoustic veil 13 is configured to retain dust falling from the plate 12, in particular in the case where it is perforated, possibly from the pipe 44 and / or from the surface of the sound-absorbing layer 10, and this under effect the force of gravity and / or movements (thermal and / or forced) of ambient air, when the modular radiant element 1 is mounted below a ceiling or on a wall of a building room.

The retention layer or veil 13 is positioned in the assembly 'between the copper or aluminum plate 12 and the covering plate 14.

The modular radiating element 1 comprises a mounting structure 15 allowing an assembly and an installation of the modular radiant element 1 (cf. FIG. 2). Advantageously, the mounting structure is provided with fixing means allowing easy mounting of the modular radiating element 1 below a ceiling or on a wall of a building room. Advantageously, the mounting structure is provided with fixing means allowing a juxtaposition and a fixing of the modular radiating element 1 next to another or other identical modular radiating elements 1 so as to form a suspended ceiling or a false larger wall.

FIG. 4 illustrates a thermal assembly of the copper or aluminum plate, in particular of a perforated copper plate 12, with a pipe or coil 11 produced by laser welding, and constituting the preferred assembly mode. This welding makes it possible to easily obtain, in a reliable, precise and inexpensive manner, welds covering large portions (straight as well as curved) of the pipe and the plates, which improves the heat exchange.

ENERGI-1-FR [0048] In order to further improve the efficiency of the heat exchange between the pipe 11 (coil) and the copper plate 12, the copper pipe can have fins inside to allow optimal heat exchange with the plate 12. In order for the thermal bond by welding to be as efficient as possible, laser welding is preferably used. In this case, one can use a copper pipe with or without fins inside having an internal diameter between 4 mm and 25 mm, preferably between 6 and 18 mm. Advantageously, the thickness of the wall of this copper pipe 11 is between 0.15 mm and 1.5 mm., Preferably between 0.2 and 0.7 mm.

As anticipated, the modular approach of the modular radiating element 1 according to the invention makes it possible to respond effectively and quickly to the sizing requirements of the system, in particular of the ceiling or wall surfaces available for the radiation system 100, contributing to the reduction of the installation costs of the radiant system.

The modular approach also allows a reduction in the manufacturing costs of the radiant system 100.

The modular radiating element 1 can be assembled by welding a copper or aluminum plate 1 to the pipe (coil 11) for the passage of the heat transfer fluid inside the pipe.

The welding operation preferably includes a laser welding step. Alternatively, said solder (soldering step) results from tin soldering or a MIG (Metal inert gas) type solder and / or a TIG (Tungsten Inert Gas) solder.

The method further comprising a step of making through holes 120 in the copper plate 12 which can be performed before or after the welding operation, in particular by drilling, punching, cutting or any other technique.

ENERGI-1-FR [0054] Once the plate 12 is welded and perforated, a sound-absorbing layer 10 is positioned above the plate 12 perforated with copper so as to cover (or cover) the pipe 11.

This step of positioning the sound absorbing layer 10 can be performed from the mounting structure 15 retaining the covering plate 14 on which the layer 13 (acoustic fleece) for dust retention has been previously laid.

The present invention also relates to a modular radiant element for the ceiling or wall of a building room, the modular radiant element 1 comprising:

a pipe 11, preferably in the form of a coil, capable of being connected to a distribution pipe of a building and / or to a pipe of another modular radiating element so as to allow a passage of a heat transfer fluid to the inside this pipe;

a copper perforated plate 12 comprising a plurality of through holes 120 so as to pass sound waves through the copper perforated plate, the copper perforated plate 12 being connected to said pipe by means of a solder; and preferably a sound-absorbing layer 10 covering said perforated copper plate 12, on the first face comprising the pipe (s)

11.

In this case, the perforations 120 of the copper radiant plate 12 not only allow a significant reduction in the supply of copper but also a reduction in noise pollution by allowing a passage of sound waves towards the sound-absorbing layer. 10 preferably present in the modular radiant element or else associated with it during assembly, making the solution economically viable.

In this case, the covering plate 14 covers said perforated copper plate 12 (on the second face not comprising the pipe (s) 11), said covering plate 14 comprising through holes 140

ENERGI-1-FR dimensioned so as to allow sound waves to pass through the cover plate 14.

ENERGI-1-FR

Reference numbers used in the figures modular radiating element sound-absorbing layer

serpentine

Groove perforated copper plate opening / hole an acoustic veil and dust retention perforated cover plate

Hole mounting structure

Welding (soldering)

Radiant air conditioning and heating system

Claims (13)

claims 1. Modular radiating element (1) of ceiling or wall for heating and / or cooling a building room, the modular radiating element comprising: a pipe (11), preferably in the form of a serpentine, capable of being connected to a distribution pipe of a building and / or to a pipe of another modular radiating element so as to allow passage of a heat transfer fluid to therein; a copper or aluminum plate (12) being connected to said pipe by means of a solder (20); and a covering plate (14) covering said copper or aluminum plate, said covering plate (14) comprising through holes (140) dimensioned so as to allow sound waves to pass through the covering plate ( 14). 2. A modular radiating element (1) according to claim 1, wherein said copper or aluminum plate comprises a plurality of through holes (120) so as to allow sound waves to pass through said copper or aluminum plate; preferably said modular radiating element further comprising a sound-absorbing layer (10) covering said copper or aluminum plate. 3. modular radiating element (1) according to claim 2, wherein the plurality of through holes (120) represents up to 40% of the surface of the copper or aluminum plate (12). 4. modular radiating element (1) according to claim 2 or 3, wherein the through holes (120) of the copper or aluminum plate are distributed and / or dimensioned non-uniformly, preferably according to a distance from said weld (20). 5. modular radiating element (1) according to one of claims 1 to 4, further comprising an acoustic veil (13) and dust retention positioned between the covering plate (14) and the copper or aluminum plate (12); said veil being configured so as to retain dust falling from said copper or aluminum plate (12) under the effect of the force of gravity and / or an air movement, when the modular radiant element (1) is mounted below a ceiling or on a wall of a building room. 6. modular radiating element (1) according to one of claims 1 to 5, in which the pipe (11) comprises a groove (110) and / or a protuberance on the internal face of its wall so as to increase the surface area d heat exchange between the fluid and the pipe wall. 7. modular radiating element (1) according to claim 6, wherein said groove (110) is helical so as to generate a turbulence facilitating the passage of the fluid through the pipe (11). 8. Modular radiating element (1) according to one of claims 1 to 7, in which the pipe (11) is made of copper. 9. Radiant system (100) for ceiling or wall of a building room comprising a plurality of modular radiating elements (1) according to one of claims 1 to 8. 10. Method of manufacturing a modular radiating element (1) of a ceiling or wall for heating and / or cooling a building room, comprising the steps of: welding a copper or aluminum plate (12) to a pipe (11) configured to allow passage of a heat transfer fluid inside; and covering said copper or aluminum plate with a cover plate (14), said cover plate (14) comprising through holes (140) dimensioned so as to allow sound waves to pass through the plate d '' covering (14) .. 11. The manufacturing method according to claim 10, comprising a step of making through holes (120) and / or notches in the copper or aluminum plate (12) before or after said welding operation. 12. The manufacturing method according to claim 10 or 11, said welding resulting from a laser solder, a tin soldering, a MIG solder or a TIG solder. 13. The manufacturing method according to claim 14 or 15, further comprising a step of positioning an acoustic veil (13) and dust retention positioned between the covering plate (14) and the copper or aluminum plate ( 12); said veil (13) being configured so as to retain dust falling from said plate (12) under the effect of the force of gravity and / or an air movement, when the modular radiant element (1) is mounted on the - below a ceiling or on a wall of a building room.