FR2780139A1 - A floor heating system for domestic, commercial or industrial premises - Google Patents

Abstract

The underfloor heating layer is formed from expanded polystyrene panels arranged side by side and covering most of the support surface. The heating tubes carry a heat transfer fluid. A film of aluminum is heat welded to the upper surface of the panels. Above the heating layer is a polyethylene film, and a double layer of load distribution panels. The heating tubes (8) in the underfloor heating layer (2) are arranged in parallel channels formed in the polystyrene panels (5) by thermal molding under the combined action of pressure and steam.

Description

The present invention relates to a floor heating system for

to be placed on a flat support

  such as the floor of a living room or commercial premises

cial or industrial.

  This underfloor heating system is more

  particularly suitable for the renovation of old buildings.

  Traditional underfloor heating systems

  nels involve heavy work which cannot as a rule

  generally be considered only in buildings under construction

tion.

  The object of the present invention is to provide a floor heating system designed to significantly reduce the weight of the system to make it compatible with

  the structure of the old buildings, and to lighten as much as possible

  mum the constraints of implementation while allowing to obtain a level of comfort similar to that reached with

  conventional underfloor heating systems.

  To this end, the invention relates to a floor heating system characterized in that it comprises a

  heated floor consisting of diffuse insulating plates

  expanded polystyrene materials arranged side by side so as to cover most of the surface of the support and

  equipped on their main face opposite the latter with

  parallel nals formed by thermomolding under the joint action

  pressure and vapor ford, and cooperating, from one diffusing insulating plate to another, to receive and maintain heating tubes forming part of a heating circuit in which circulates a low temperature heat-transfer fluid which extend parallel on the surface of the

support.

  An aluminum film ensuring perfect conduct-

  thermal activity, as well as a homogeneous distribution of the heat diffusion and making it possible to stiffen the diffusing insulating plates is heat-sealed on the principal face of these so as to cover it by fitting perfectly each channel so as to establish an excellent thermal conductivity between the outer wall of the heating tubes and the

  conductive material (aluminum) heat distributor.

  In a conventional manner, the heated floor is covered by a dry distribution screed on which is laid in particular glued a floor covering such as tiling,

parquet or carpet.

  The diffusing insulating plates are preferably rectangular plates made of expanded polystyrene having a density of the order of 40 g / l which gives them

  gives very good thermal insulation characteristics

  than. Their thickness can vary from around 20 to 50 mm depending on the technical constraints of the room to be heated and

  is preferably of the order of 25 mm.

  Their dimension is generally 1150 mm x 750 mm, or a useful plate surface of 0.862 m. In accordance with the invention, the integral covering aluminum film preferably has a thickness of / which, taking into account '' an X coefficient of 200 W / mK

  gives diffusing insulating plates excellent properties

  thermal diffusion characteristics.

  It should be noted that the aluminum film can

  taggingly be treated on one side with a reactive adhesive

  ble hot to perform thermoforming and

  heat sealing in one operation.

  According to the invention, the insulating plates

  diffusers therefore have a triple thermal insulation function

  that of guiding and "clipping" the heating and

distribution of heat.

  It is known that the performance of a heated floor depends on several factors, in particular the spacing of the heating tubes and the conductivity.

  thermal of the environment in which they are placed.

  However, as a general rule, the heating circuits produced in a crosslinked polyethylene tube are of a single

  length without welds or fittings. At each end of the lo-

  cal to heat the tube is bent at 180 that is to say bent in a U shape so as to produce a coil. Considering

  the minimum admissible bending radius for the poly tube

  cross-linked ethylene (7 times the value of the outside diameter),

  the performance of a floor heating system is largely

  summed by thermal conductivity.

  It has been possible to verify in accordance with the invention that the presence of a 100 g integral covering aluminum film ensures excellent thermal conductivity transmits-

  as a particularly homogeneous homogeneous temperature

table for the user.

  In addition, the channels generally receive

  holds a crosslinked polyethylene tube receiving a notice

  class 2 technique with an exclusive diameter of 16 x 1.5.

  Consequently according to the invention, they have a width of the order of 16 mm and a depth of the order of 16 mm at the level of the lower generatrix of the tube.

associated heating.

  The size of these channels, which are generally

  neral spaced about 7.5 cm allows the holding in place of the heating tubes so that their upper generator is flush with the upper part of insulating diffusing plates. It is the heat balance of the building to be heated which determines the spacing of the tubes. Taking into account the characteristics of thermal conductivity previously

  described, therefore not all channels receive mandatory-

a heating tube.

  As already indicated, the heating circuit

  fage is generally a coil made from a single

  piece and consisting of a set of rec-

  cross-linked polyethylene sheets connected at their ends by U-shaped bends and extending over the surface of the support between longitudinal edges parallel to the heating tubes and transverse edges perpendicular to these tubes. According to this configuration, and according to another characteristic of the invention, the insulating plates

  diffusing contiguous to the transverse edges of the support coo-

  run with connection plates fitted on their main face opposite to the latter with channels capable of receiving and holding the coil at the level of the U-shaped bends. The channels of the connection plates must

  heard to be located in the extension of the channels of the

diffusing insulating materials.

  The connecting plates have a width and a thickness identical to those of the diffusing insulating plates; they generally have a dimension of 750 x 575 mm, i.e. a useful surface of 0.431 m

  In addition, the connection plates are made

  in the same material as the diffuse insulating plates

  health and their channels are also formed by thermomolding under the combined action of pressure and

  steam; these connecting plates preferably have a geometrical

  sorts allowing them to modulate the spacing of the heating tubes and consequently to preserve the bending radius at the level of the U-shaped bends. It should be noted that the connection plates are not

  coated with aluminum film at the time of installation.

  It is in fact not possible to cover the connection plates with such a film during their manufacture; as a result an aluminum film of 100 y with a width of

  mm and 20 m long as part of the accessories

  additional res and associated with a suitable tool allows

  to shape on site, during implementation, the overlap

  aluminum to equip the maximum surface area

its diffusing power.

  According to the invention, the dry screed

  load partition can of course be formed by a traditional concrete slab; however aiming at the underfloor heating equipment in the old buildings one seeks according to the invention to considerably reduce the load (weight) and to avoid the constraints imposed by the

heavy work.

  To this end and according to a preferred characteristic

  of the invention the dry screed of distribution of

  load consists of a set of distribution plates

  prefabricated load tion assembled by screwing and gluing

lage on site.

  These load distribution plates are pre-

  ference made of a plaster / cellulose fiber mixture; the dry screed thus offers a thermal conductivity of

  0.82 W / m.K and a flexural strength of 5 N / mm.

  More precisely the dry distribution screed

  is advantageously constituted by a double layer of plate

  load distribution plates with a thickness of the order of 12.5 mm each and assembled in the factory so as to obtain a total thickness of approximately 25 mm for a specific weight

about 30 kg.

  It should be noted that in accordance with the invention the

  dry screed accepts loads of 250 kg per m.

  This screed also has the advantage of being easy and quick to install, while admitting

any type of flooring.

  It should be noted that in accordance with the invention, the heated floor and the dry load distribution screed

  are advantageously separated by a polyethylene film

  superimposed between these elements to form a layer of glide-

is lying.

  The characteristics of the system which is the subject of the invention will be described in more detail with reference to the accompanying drawings in which:

  - Figure 1 is a partial cross section of the sys-

  teme, - Figure 2 is a top view of the heated floor, - Figure 3 is a top view of a diffusing insulating plate,

  - Figure 4 is a top view of a connecting plate.

  According to Figure 1, the system is intended to be placed on a flat support 1 of a part to be equipped and is

  schematically constituted by a heated floor 2 covered

  green of a dry load distribution screed 3 on which is laid a floor covering not shown on the

figures.

  The heated floor 2 and the dry screed

  partition 3 are separated by a polyethylene film 7

  interposed between these elements to form a layer of glis-

sement.

  The heated floor 2 is constituted by a se-

  rie of insulating diffusing plates 4 of expanded polystyrene arranged side by side so as to cover the major part

  of the surface of the support 1 as shown in FIG. 2.

  According to FIG. 3, the insulating plates diffused

  santes 4 are rectangular plates of length L and width fitted on their main faces 41 (Figure 1)

  of parallel heating channels 5 formed by thermomolding.

  Each of the diffusing insulating plates 4 is positioned so as to ensure the extension of the channels of the plate

  previously positioned as shown in Figure 2.

  According to FIG. 1, the main faces 41 of the diffusing insulating plates 4 are also covered with an aluminum film 6 heat-sealed thereon so as to

  cover them by matching each of the channels 5.

  As shown in Figures 1 and 2, the ca-

  nals 5 are sized to hold heating tubes

  fage 8 of corresponding shape and dimension so that their upper generatrix is flush with the main face 41,

of the insulating diffusing plate 4.

  According to Figure 2, these tubes 8 are part of a

  heating circuit 9 in which a heat transfer fluid circulates

tor.

  The heating circuit 9 is usually

  trowel designed in the form of a coil made in one piece without fittings or welding and constituted by a set of rectilinear heating tubes 8 bent at 180 at their ends, that is to say equipped with bends at this level

U shape 10.

  According to Figure 2, the coil 9 covers the to-

  tality of the surface of the support 1 between longitudinal edges

  channels 11 parallel to the heating tubes 8 and edges

  transverse 12 perpendicular to these tubes.

  According to FIG. 1, the insulating plates diffused

  santes 4 contiguous to the transverse edges 12 of the support 1 cooperate with connection plates 13 shown on the

figure 4.

  These connecting plates 13 have a length L1 and a width ú corresponding to that of the diffusing insulating plates 4. The connecting plates 13 have, moreover, the same thickness e as the diffusing insulating plates 4 and are also equipped on their face main opposite to the support 1 of channels 14 formed by thermomolding located in

  the extension of the channels 5 of the insulating diffusing plates

your 4.

  The channels 14 have the function of receiving and maintaining the coil 9 at the level of the U-shaped bends 10. It should be noted that the connection plates 13 which

  are made of the same material as the insulating plates

  your diffusantes 4; however, the cladding of the aluminum film is not technically feasible during manufacture

  this is carried out at the time of implementation.

  The geometry of the channels 14 fitted to the connection plates 13 which is detailed in FIG. 4 is designed so as to allow the spacing of the heating tubes 8 to be varied while maintaining an optimal bending radius for the bends 10 in the form of U as shown in the

figure 2.

  Furthermore and according to FIG. 1, the dry distribution screed 3 is constituted by a double layer (glued in the factory) of distribution plates 15 cut out and

  assembled by screwing and gluing on site.

Claims (6)

R E V E N D I C A T IONS   1) Underfloor heating system intended to be placed on   a planar support in particular for the renovation of buildings   old items, characterized in that it comprises:   e on the one hand a heated floor (2) consisting of plates   diffusing insulating inserts (4) in expanded polystyrene   placed side by side so as to cover most of the surface of the support (1) and equipped on their main face O10 (41) opposite the latter with parallel channels (5) formed by thermomolding under the combined action of the   pressure and steam and cooperating, from an iso- plate   diffusing lante to another, to receive and maintain heating tubes (8) forming part of a heating circuit (9) in which circulates a heat transfer fluid which extend parallel on the surface of the support (1), a   aluminum film (6) being heat sealed on the main face   blade (41) of the insulating diffusing plates (4) so as to cover the latter by matching each channel (5), and * on the other hand a dry load distribution screed (3) covering the heating floor (2) and on which is laid in particular glued a floor covering in particular of the type tiling, parquet or carpet.   2) System according to claim 1, characterized in that   the diffusing insulating plates (4) are rec-   tangular produced in an expanded polystyrene having a density of the order of 40 g / l and having a thickness (e)   from about 20 to 50 mm, preferably of the order of 25 mm.   3) System according to any one of claims 1 and 2,   characterized in that the channels (5) have a width of around 16 mm and a depth of around 16 mm at the level of the generator   bottom of the associated heating tube (8).   4) System according to any one of claims 1 to 3,   characterized in that the aluminum film (6) has a thickness of the order of 100 p.    ) System according to any one of claims 1 to 4,   characterized in that the channels (5) of the insulating diffusing plates (4) are about 7.5 cm apart.   6) System according to any one of claims 1 to 5,   in which the heating circuit is a coil made in one piece and constituted by a set of tubes   rectilinear heating in particular in crosslinked polyethylene   linked at their ends by U-shaped bends and   extending over the surface of the support between longitudinal edges   dinals parallel to the heating tubes and trans-   transverse perpendicular to these tubes, characterized in that the diffusing insulating plates (4) contiguous to the transverse edges (12) of the support (1) cooperate with connection plates (13) equipped on their main face opposite to the latter with channels ( 14) being able to receive and maintain the coil (9) at the level of the U-shaped bends (10), these   connecting plates (13) having a width (X) and a thickness   identical to those of diffusing insulating plates   tes (4) and being made of the same material, but only being coated with an aluminum film at the time of installation. 7) System according to claim 6, characterized in that   the channels (14) of connection plates (13), formed by therm-   molding under the combined action of pressure and pressure   fear, have a geometry allowing them to modulate   the spacing of the heating tubes (8) and as a result of pre-   serve the bending radius at the shaped bends of U (10).   8) System according to any one of claims 1 to 7,   characterized in that the dry load distribution screed (3) consists of a set of prefabricated load distribution plates (15) assembled by screwing and gluing. 5 9) System according to claim 8, characterized in that   the dry distribution screed (3) consists of a double   ble layer of load distribution plates (15) having a thickness of the order of 12.5 mm each and assembled in the factory so as to obtain a total thickness of approximately 25 mm   for a specific weight of around 30 kg.    ) System according to any one of claims 1 to 9,   characterized in that the heating floor (2) and the dry distribution screed (3) are separated by an interposed polyethylene film (7)   between these elements to form a sliding layer.