DE20118008U1 - Surface heating and / or cooling device - Google Patents

Description

Surface heating and/or cooling system

The invention relates to a surface heating and/or cooling device with at least one capillary tube mat, the capillary tubes of which are connected to distributor and collector pipes (main pipes), wherein the at least one capillary tube mat can be integrated into a surface element (surface component) of a building and the main pipes of which can be connected to supply and discharge lines on the building side.

Surface heating and/or cooling devices of the generic type are known. In this case, prefabricated capillary tube mats, which consist of capillary tubes arranged in parallel and connected to distributor and collector pipes (main pipes), are integrated into surface elements of buildings, for example floors, walls, ceilings or the like. The capillary tube mats are installed in a screed plate on the subfloor, in the case of floating screeds on the insulation layer, on the subfloor, in a plaster layer, on drywall panels or in coffered ceilings.

It has been shown that capillary tube mats can easily be damaged on construction sites due to improper handling, for example by unauthorized persons.

Planning and design, laying, assembling and connecting the capillary tube mats on site, as well as the coordination effort with the building, are labor-intensive and time-consuming. In particular, when capillary tube mats are to be laid on a so-called unfinished floor before pouring a heated screed or on a wall before plastering the wall, laying them poses a problem due to the main pipes protruding from the level of the capillary tube mats - as these have a larger diameter than the capillary tubes. Either the main pipes protruding from the level of the capillary tube mats must be covered with a correspondingly thick covering layer (heating layer, cooling layer). This leads to losses in efficiency and poor control dynamics due to the thickness of the covering layer. For reasons of comfort and energy saving, the surface heating and/or cooling device should have good control dynamics and be operated with the lowest possible heating water temperature and/or the highest possible cooling water temperature. To do this, it is advisable to lay the capillary tubes as close as possible to the heat-exchanging, i.e. inner, surface of a room. The main pipes protrude above the level of the capillary tube mat due to their larger diameter, which contradicts this requirement.

It has therefore already been proposed to arrange the main pipes in the gap between floor and wall or ceiling and wall, in casings, behind room partitions, above suspended ceilings, in stucco profiles or the like.

Although it can be achieved that the capillary tubes themselves can be arranged as close as possible to the heat-exchanging surfaces, the location of the main tubes means that the capillary tubes have to be extended, which does not serve the actual purpose of regulated heat exchange. This means that a high level of design and integration effort is required when planning and building such surface heating and/or cooling systems.

On the other hand, it is possible to create a corresponding groove in the subfloor for the recessed arrangement of the protruding main pipes, for example by milling, chiseling or the like. In addition to the effort involved, there are risks of static weakening of the building's structural elements.

In DE 41 06 200 A1 it is proposed to pre-assemble the capillary tube mats in prefabricated carrier plates in order to avoid such disadvantages. In addition to the cumbersome handling of such prefabricated carrier plates, a flexible adaptation of the capillary tube mats to different heating and/or cooling surfaces is only possible with great effort. Furthermore, the carrier plate is statically weakened at the location of the distribution and collector pipes.

The invention is based on the object of providing a surface heating and/or cooling device of the generic type

to create a system of this kind that can be used easily, safely and flexibly on site.

According to the invention, this object is achieved by a surface heating and/or cooling device with the features mentioned in claim 1. The fact that a main pipe channel is provided for receiving the main pipes (distribution and collector pipes and, if applicable, Tichelmann pipe), which can be arranged on or on a surface element independently of the capillary tube mats in terms of time and assembly, and the main pipe channel can be integrated into the surface element, advantageously ensures that the main pipes can be arranged in a safe and protected manner. The main pipe channels also ensure that there are relatively free design options with regard to the arrangement of the main pipes and thus of the entire capillary tube mat. The main pipes no longer have to be arranged in corner areas of a room or behind paneling elements or the like. This results in less planning and assembly effort for the surface heating and/or cooling devices according to the invention. Complex chiseling work or the like to create free space for laying the main pipes is also eliminated.

By pre-assembling the main pipe channels, they can be integrated into a screed or similar that is to be applied to the subfloor. The main pipe channel also acts as reinforcement for the screed, so that the strength and load-bearing capacity of the

The screed slab is not affected and may even be improved. After the capillary tube mats with their main pipes have been inserted into the main pipe channel and the capillary tube mats have been laid out on the screed, they are easily covered with a heating and/or cooling layer so that the capillary tube mats and the main pipe channels are fully integrated into the surface element. The arrangement found here means that the covering layer (heating layer and/or cooling layer) in particular can be made particularly thin-walled. The capillary tubes can thus be arranged as close as possible to the heat-exchanging surface so that high levels of efficiency can be achieved.

In a preferred embodiment of the invention, the main pipe channel is rigid about its longitudinal axis and its transverse axis. This advantageously makes it possible to maintain a compressive strength and a bending tensile strength of the screed plate despite the integration of the main pipe channels, without the height of the screed plate having to be increased. In particular, this prevents greater installation heights of the screed plate from having to be taken into account in the planning. In this respect, decisions about the use of the surface heating and/or cooling device according to the invention with main pipe channels can still be made at a relatively late construction phase.

In a further preferred embodiment of the invention, it is provided that the main pipe channels have

Support elements, in particular on impact sound insulation, can be arranged on the subfloor. This makes it easy to align the main pipe channels and adjust them to the height of the screed slab specified by the customer. In particular, if the support elements are height-adjustable, a height tolerance of the subfloor can be easily compensated.

Furthermore, in a preferred embodiment of the invention, the support elements are formed by supports (feet) arranged at a distance along the length of the main pipe channels, so that free passage openings are created below the main pipe channels. As a result, the introduction of a flowing screed or the like onto the subfloor or the impact sound insulation is not hindered by the main pipe channels and these can therefore be introduced into the screed in a simple manner.

Furthermore, in a preferred embodiment of the invention, it is provided that the main pipe channels are assigned connecting plates and/or end plates that form the supports. These connecting and/or end plates, which extend essentially transversely to the longitudinal extension of the main pipe channels, serve on the one hand to increase the bending stiffness of the main pipe channels. Furthermore, this makes it possible to easily assemble several main pipe channel modules together until the desired total length of the main pipe channel is achieved. In addition, it is preferably provided that the

Connecting and/or end plates comprise additional support areas that are aligned essentially parallel to the longitudinal extension of the main pipe channel. These support areas advantageously prevent the main pipe channels from floating when flowing screed or the like is laid. These additional support areas lie essentially flat on the substrate (impact sound insulation, subfloor) so that the flowing screed cannot get underneath these areas, but covers them from above and thus prevents floating. Furthermore, these additional support areas distribute the load, so that, for example, damage to the impact sound insulation is avoided.

According to a further preferred embodiment of the invention, it is provided that the connecting and/or end plates preferably have at least one opening. The at least one opening allows the penetration of flowing screed or the like. This makes it possible to anchor the main pipe channel in the flowing screed without any problems. In addition, the plates can preferably form tension anchors that engage in the screed plate (are encompassed by it). This ensures that the compressive strength and tensile strength of the screed plate are not impaired in the area of the main pipe channels.

In a further preferred embodiment of the invention, it is provided that the main pipe channels have a

The profile element must comprise a receiving area for the main pipes, the height of which essentially corresponds to the diameter of the main pipes. This optimizes the dimensions of the main pipe channel to the dimensions of the main pipes, so that the installation depth of the main pipe channel in the screed plate is reduced to a minimum.

It is also preferred if the profile element comprises positioning aids for the main pipes. This advantageously makes it possible to achieve an exact alignment of the main pipes within the main pipe channels, so that the capillary tube mats can be arranged in the correct position without special adjustments or the like. The positioning aids simultaneously form spacers for the main pipes, which keep the pipes in the main pipe channel at a distance from each other, from the legs and from the ground, so that they facilitate complete enveloping of the main pipes with a filling compound (heating and/or cooling layer) when the receiving area of the main pipe channels is later filled.

Furthermore, in a preferred embodiment of the invention, at least one tie rod is assigned to the main pipe channels. This advantageously ensures that the notch effect of the main pipe channels in the screed can be eliminated by means of the tie rods. Furthermore, bending tensile forces of the screed plate can be transmitted via the tie rods. This makes it possible to easily anchor the main pipe channels in the screed plate.

Furthermore, in a preferred embodiment of the invention, at least one hold-down device is assigned to the main pipe channel, which is preferably formed by elements that can be connected to the legs of the profile element in a force-fitting manner. This advantageously ensures that the main pipes inserted in the main pipe channels remain adjusted, i.e. cannot change their predetermined position. In addition, the hold-down devices can absorb tensile forces that occur in the upper region of the main pipe channels.

Further preferred embodiments of the invention result from the remaining features mentioned in the subclaims.

It is also essential for the invention that the capillary tube mat consisting of capillary tubes and main tubes, possibly a Tichelmann tube, and the main tube channel with connectors for the building's connecting lines form a unit. This unit, collectively referred to as a surface heating element/surface cooling element, can be integrated into surface elements of buildings with great freedom. The structured design also makes it possible to create a surface heating element with a cooling option. The surface heating element or the surface cooling element can be easily connected to connections for conventional heating technology installed on the building, for example floor distribution technology or vertical distribution technology.

The invention is explained in more detail below in exemplary embodiments with reference to the accompanying drawings. They show:

Figure 1 is a schematic perspective view of a main pipe channel with capillary tube mat;

Figure 2 is a sectional view of the main pipe channel;

Figure 3 different views of connecting plates;

Figure 4 different views of end plates;

Figure 5 is a plan view of a main pipe channel and

Figures Views of a main pipe duct for a 6 to 8 wall or ceiling mounting.

Figure 1 shows a schematic perspective view of a main pipe channel 10. The main pipe channel 10 is arranged on the impact sound insulation of a subfloor 14 via support elements 12. In the following, reference is always made to subfloor 14, whereby it is clear that additional impact sound insulation is usually arranged between subfloor 14 and main pipe channel 10. The support elements 12 are part of connecting plates 23 and end plates, which will be referred to later. The subfloor 14 is, for example,

• · * &bgr; ft ft» · * * ft ·· ··· ft ft ft ft · · · · · ·

• ft · · · · ft ft ·· ft ft ·

··* ftftftft ft· ftftft ·· *· ftftft

the substructure of a floor in buildings or the like. The main pipe channel 10 is formed by a profile element 16, which forms a receiving area 18 for main pipes 20 of a capillary tube mat, designated overall by 22. The capillary tube mat 22 comprises, as is known, capillary tubes 24, which are connected to the main pipes 20 designed as a distributor pipe or collector pipe. The main pipe channel 10 also receives a so-called Tichelmann pipe 21. The Tichelmann pipe 21 forms a return pipe, which serves to ensure that the individual capillary tubes 24 are connected in the Tichelmann system when the capillary tube mat 22 is connected on one side. This results in equal length paths for the passage of media, for example heating water, through the individual capillary tubes 24 and thus an equal pressure loss within the capillary tube mat 22. If the capillary tube mat 22 is connected on both sides, the Tichelmann tube 21 can be dispensed with. The structure and function of such capillary tube mats 22 are generally known, so that they will not be discussed in more detail in the context of the present description.

The main pipe channel 10 is embedded in a screed layer 26, while the capillary tube mat 22 is embedded in a heating and/or cooling layer 32. This will be discussed in more detail with reference to Figure 2.

Figure 2 shows a schematic sectional view through the surface heating and/or cooling device 100.

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■ II ···· «ΦΦ ··

• ? &phgr;&phgr;&phgr;&phgr;&phgr;&phgr;&phgr;&phgr;«·

&Igr;&phgr;&phgr;ΦΦ·· ·« ··· ΦΦ ··

The same parts as in Figure 1 are provided with the same reference numerals and are not explained again.

The sectional view clearly shows that the main pipe channel 10 comprises positioning aids 30 which are connected to the profile element 16 and project into the receiving area 18 for the main pipes 20 and the Tichelmann pipe 21. The positioning aids 30 lead to a one-point or two-point support of the main pipes 20 and the Tichelmann pipe 21 and allow a self-adjusting assembly of the capillary tube mats 22 with a known, standardized diameter of the main pipe 20. A height h ₃ of the profile element 16 is dimensioned such that the main pipes 20 are arranged below the assembly level of the capillary tubes 24. The positioning aids 30 simultaneously form spacers for the pipes 20 and 21 to the profile element 16, so that a subsequent complete enclosure of the pipes 20, 21 with a filling compound (heating and/or cooling layer 32) in the main pipe channel 10 is ensured.

The sectional view in Figure 2 shows how the main pipe channel 10 is arranged within the screed layer 26. The representation of a connecting plate and/or connection plate - via which the main pipe channel 10 is supported on the impact sound insulation (subfloor 14) - has been omitted for reasons of clarity. It is particularly clear how tie rods 29 are enclosed by the screed layer 26. These tie rods 29, in particular with their claw-shaped ends 31, support the work-

ing effect of the main pipe channel 10, so that the bending tensile strength and compressive strength of the screed layer 26 is maintained despite its partial weakening by the three pipes in the area of the main pipe channel 10.

Figure 2 also shows fastening tabs 33, by means of which the connecting plates 23 or the end plates are fastened to the main pipe channels 10. Threaded holes can be provided in the fastening tabs 33 so that the plates can be screwed to the main pipe channel 10. Of course, other connection techniques are also possible, for example welding, even without fastening tabs, gluing, snapping or the like.

The main pipe channels 10 are preferably made of galvanized or painted sheet steel, aluminum, plastic (for example as injection molded parts) or copper, which are designed as bent parts according to the design of the profile elements 16. Rounded edges 41 can be created here so that damage to the capillary tubes 24 or the main pipes 20 can be ruled out. In particular, a sharp-edged transition between the legs 36 and the upper, essentially horizontal end legs 38 is avoided. The legs 38 are designed symmetrically or asymmetrically. In the case of an asymmetric design, the leg 38 on the capillary tube side is longer and at the same time serves to support and fasten the capillary tubes.

capillary tube mat 22. This leg 38 has a receiving groove 44 for inserting a spacer strip 46 of the capillary tube mat 22.

Figure 2a again shows a schematic representation of the typical floor structure used when using the surface heating and/or cooling device according to the invention. A leveling layer 48 is applied to the subfloor 14, within which the building-side connecting pipes 50 (supply, return) are arranged. On the leveling layer 48 there is impact sound insulation 52, on which the main pipe channels 10 are arranged. These are then integrated into the screed layer 26, onto which the heating and/or cooling layer 32 is applied.

Figures 3a, 3b and 3c show different views of a connecting plate 23, by means of which the main pipe channels 10 are mounted on the subfloor 14. Figure 3a shows a front view, Figure 3b a side view and Figure 3c a top view. The front view clearly shows that the connecting plate 23 has openings 25. On its side facing the subfloor 14, the connecting plate 23 has support areas 27, which allow flat support on the subfloor 14. Furthermore, tension anchors 29 can be seen.

The openings 25 allow the flowing screed 26 to pass through, so that a force-fitting integration of the connecting plates 23 and thus of the main pipe channels 10 connected to them into the screed

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layer 26 is ensured. The support areas 27 simultaneously prevent the main pipe channels 10 from floating when the flowing screed 26 is introduced. This comes into contact with the connecting plates 23 above the support areas 27 so that these are pressed against the subfloor 14 by the weight and toughness of the screed. At the same time, the support areas 27 serve to distribute the load on the impact sound insulation so that damage to the impact sound insulation is prevented. The tie rods 29 provided are surrounded by the screed layer 26 so that the tensile strength of the screed layer 26 in the area of the main pipe channels 10 is not impaired. The tie rods 29 transmit bending tensile forces of the screed and virtually compensate for the cross-sectional weakening of the screed layer 26 by the main pipe channel 10.

Figure 3a also shows a recess 35 which corresponds to the cross-section of the receiving area 18 of the main pipe channel 10. Thus, the connecting plates 23 do not hinder the subsequent laying of the main pipes 20 or the Tichelmann pipe 21.

Figures 4a, 4b and 4c show views of a closure plate 37 which essentially corresponds to the structure of the connecting plates 23. In this respect, only differences are discussed. Instead of the opening 35, the closure plates 37 have openings 39 which allow a connection of the main pipes 20

to a building-side supply and drainage line (flow and return).

Figure 5 shows a top view of a main pipe channel 10. The same parts as in the previous figures are provided with the same reference numerals and are not explained again. The top view clearly shows the spaced arrangement of the tie rods 29. This ensures anchoring in the screed layer 26 and at the same time keeps the installation space below the profile element 16 free for the flow front of a screed to be introduced. The positioning aids or spacers 30 arranged in approximately the same alignment as the tie rod 29 can also be seen. This top view also shows that hold-down devices 42 are arranged between the legs 38. These hold-down devices 42 span the receiving area 18 of the profile element 16. Hold-down devices 42 serve the purpose of holding the main pipes 20 and, if applicable, the Tichelmann pipe 21 in their assumed position after the capillary tube mats 22 have been previously inserted. In particular, the holding-down devices 42 prevent the main pipes 20 from floating during the application of the heating and/or cooling layer 32. The holding-down devices 42 are attached after the capillary tube mats 22 have been inserted. These can be screwed, glued, snapped or the like onto the profile element 16, for example. In order to achieve a particularly precise fixation of the main pipes 20 and the Tichelmann pipe 21, it can be provided that the holding-down devices 42 have a

wise 21 have an adapted contour, as is clear from the perspective view in Figure 1. This results in a relatively large contact surface between the hold-down device 42 and the outer circumferences of the tubes 20 and 21.

When installing the surface heating and/or cooling device 100, proceed as follows:

After laying the building's supply and discharge lines (flow, return), a leveling layer and impact sound insulation are applied to the bare floor. The supply and return lines are introduced into the main pipe channels 10 through recesses provided in the floor so that a connection to the main pipes 20 is possible. The main pipe channels 10 themselves are placed on impact sound insulation and secured there, for example by gluing, nailing, pinning (or the like). In particular, it can be provided that the support elements 12 are made height-adjustable so that tolerances can be compensated. A sound-decoupled arrangement of the main pipe channels 10 on the bare floor is also possible.

The main pipe channel 10 or the main pipe channels 10 are positioned on the subfloor 14 (impact sound insulation) according to a laying plan of the capillary tube mats 22. The screed layer 26 is then applied to the subfloor 14, for example by adding flowing screed. The screed layer has a height hi and ends at the top edge of the main pipe channel 10. The main pipe channel

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The pipe channel 10 is thus virtually embedded in the screed layer 26. The main pipe channel 10 simultaneously serves as reinforcement for the screed layer 26.

The capillary tube mat 22 is then applied to the screed layer 26 (after it has hardened). The main pipes 20 are placed in the main pipe channel 10 and the capillary tubes 24 lie flat on the screed layer 26. The building-side supply and discharge lines (flow and return) are connected to the distribution or collector pipes 20. The heating and/or cooling layer 32 is then applied so that the main pipe channel 10 is filled and the capillary tube mat 22 is completely integrated into the heating and/or cooling layer 32. The entire layer structure with the height h thus results from the partial heights hi of the screed layer 26 and the partial height h ₂ of the cooling and/or heating layer 32.

Overall, the surface heating and/or cooling device 100 according to the invention can be used without additional structural measures in residential construction, commercial construction or - generally speaking - multi-storey construction. The surface heating and/or cooling device 100 can be used with normal floor construction heights without underfloor heating. A decision on the type of heating system, for example the use of the surface heating and/or cooling device 100 according to the invention, can therefore be made at a relatively late stage in the construction phase. Not already during the shell planning, i.e. when determining

the building heights, but the relevant decision can only be made during the preliminary draft of the building services planning, for example. Changes to the heating system are even possible during the draft stage of the architect's planning. It can also be used without any problems in the renovation of old buildings. Connection to all known heating circuit or cooling circuit distribution systems is possible.

Depending on the area to be heated or cooled, the main pipe channels 10 can be supplied in standard lengths and can be arranged in a row. A standard length can be, for example, 600 mm (other lengths are also possible). A height h ₃ of the main pipe channels 10 is, for example, 25 mm and a width of the receiving area 18 is, for example, 80 to 100 mm. The main pipe channels 10 are therefore available as modular units that can be arranged in a row to achieve the desired total length. A connecting plate (Figure 3) is arranged between each module, which also supports the main pipe channels 10 on the impact sound insulation (subfloor 14). End plates (Figure 4) are provided at each end, which also support the impact sound insulation.

The structure and function of a surface heating and/or cooling device 100 for floor installation has been described with reference to the previous figures. In an analogous manner, the surface heating and/or cooling device 100 can be integrated into walls and/or ceilings of buildings.

In the case of wall mounting, the main pipe channel 10 can be installed in corresponding vertical and/or horizontal and/or angled wall slots. After inserting the capillary tube mats 22, the wall is plastered over so that the surface heating and/or cooling device 100 is integrated into the wall.

Preferably for ceiling installation, but also for wall or floor installation, the main pipe ducts 10 can be installed, for example, as lost formwork open to the room.

For wall and ceiling installation, there are generally no requirements for the load-bearing capacity of the main pipe channel 10 to take on building loads. In principle, the main pipe channel 10 used for floor installation - for installation in a screed slab - can therefore be used, whereby the tension anchors 29 on the main pipe channel 10 and the support areas 27 on the connecting plates 23 or end plates 27 can be dispensed with. Figures 6 to 8 each show a main pipe channel 10' and a connecting plate 23'. The same parts with the same function as the main pipe channels 10 for floor installation are each provided with the same reference numerals and are not explained again. Figure 6 shows a sectional view and Figure 8 a top view of the main pipe channel 10', while Figures 7a, 7b and 7c show different views of the connecting plate.

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List of reference symbols

10 Main pipe channel

10' main pipe channel

12 support elements

14 Unfinished floor

16 Profile element

18 Recording area

20 trunk pipes

21 Tichelmann tube

22 Capillary tube mat

23 Connecting Plates 23' Connecting Plate

24 capillary tubes

25 Breakthrough

26 Screed layer

27 support areas

29 tie rods

30 positioning aids

31 End

32 Heating/cooling layer

33 mounting tabs

35 recess

36 legs

37 End plate

38 legs

39 breakthroughs

41 edges

42 hold-down device 4 4 slot

46 Spacer bar

48 Leveling layer

22

52 Impact sound insulation 100 Surface heating and/or cooling system

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Claims (14)

1. Surface heating and/or cooling device, with at least one capillary tube mat, the capillary tubes of which are connected to distributor and collector pipes (main pipes), wherein the at least one capillary tube mat can be integrated into a surface element (surface component) of a building and the main pipes of which can be connected to building-side supply and discharge lines, characterized by a main pipe channel ( 10 ) for receiving the main pipes ( 20 ), which can be arranged independently of the at least one capillary tube mat ( 22 ) on, in and/or on the surface element and which can be integrated into the surface element. 2. Surface heating and/or cooling device according to claim 1, characterized in that the main pipe channel ( 10 ) can be integrated into the surface element after completion with the capillary tube mat ( 22 ). 3. Surface heating and/or cooling device according to one of the preceding claims, characterized in that the main pipe channel ( 10 ) is integrated into the surface element in a flexurally rigid manner about its longitudinal axis and its transverse axis. 4. Surface heating and/or cooling device according to one of the preceding claims, characterized in that the main pipe channel ( 10 ) can be arranged on a subfloor ( 14 ) via support elements ( 12 ). 5. Surface heating and/or cooling device according to claim 4, characterized in that the support elements ( 12 ) are formed by connecting plates ( 23 ) and/or end plates ( 27 ). 6. Surface heating and/or cooling device according to claim 4, characterized in that the support elements ( 12 ) have at least one opening ( 25 ). 7. Surface heating and/or cooling device according to one of the preceding claims, characterized in that the support elements ( 12 ) form tension anchors ( 29 ) acting transversely to the longitudinal axis of the main pipe channel ( 10 ). 8. Surface heating and/or cooling device according to one of the preceding claims, characterized in that the support elements ( 12 ) have bearing areas ( 27 ). 9. Surface heating and/or cooling device according to one of the preceding claims, characterized in that the main pipe channel ( 10 ) or the support elements ( 12 ) are height-adjustable. 10. Surface heating and/or cooling device according to one of the preceding claims, characterized in that the main pipe channel ( 10 ) is formed by a profile element ( 16 ) forming a receiving area ( 18 ) for the main pipes ( 20 ), the height (h ₃ ) of which is greater than or equal to a diameter of the main pipes ( 20 ). 11. Surface heating and/or cooling device according to one of the preceding claims, characterized in that the profile element ( 16 ) preferably comprises positioning aids ( 30 ) designed as spacers for the main pipes ( 20 ). 12. Surface heating and/or cooling device according to one of the preceding claims, characterized in that at least one tension anchor ( 29 ) is assigned to the main pipe channel ( 10 ). 13. Surface heating and/or cooling device according to claim 12, characterized in that the at least one tie rod ( 40 ) is formed by elements that are non-positively connected to legs ( 38 ) of the main pipe channel ( 10 ). 14. Surface heating and/or cooling device according to one of the preceding claims, characterized in that at least one hold-down device ( 42 ) for the main pipes ( 20 ) is assigned to the main pipe channel ( 10 ).