EP0000484B1 - Mounting device for liquid surface heating. - Google Patents

Description

The invention relates to a prefabricated installation element for liquid surface heating made of insulating materials, such as polystyrene foam or the like, on which heating pipes are to be laid and fastened by means of holding devices with recesses which are open at the top.

From DE-A-2456836 an installation element of the type described is known, in which web-shaped holding devices are used, which have recesses on their upper side with the same distance from the edges of the installation element. The spacing and arrangement of the recesses are selected such that after the installation elements have been installed, the recesses in one installation element are aligned with the recesses in the adjacent installation element. The holding devices arranged on a built-in element in the known device accordingly consist of webs with grooves into which the heating pipes are inserted. These grooves can only accommodate the pipes in a certain direction.

In contrast, the invention is based on the object, the holding devices in such a way that the heating tubes can be accommodated in two intersecting directions.

This object is also achieved by the holding device known from CH-A569235, in which upwardly projecting and rotatably arranged pins are provided. However, these brackets require a special turned part, which can wear out. This can loosen the cohesion between the heating pipe and the pad.

The present invention is therefore based on the object of improving the holding devices in such a way that the heating pipes can be received in two intersecting directions, a special rotating device being dispensed with.

This object is achieved in a built-in element for liquid surface heating of the type mentioned in that the holding devices as individual holding devices consist of a base with an upstanding rim, which is provided with two times two mutually opposite recesses, two paths arranged at 90 ° crosswise arise for the heating pipe to be inserted.

The holding devices are preferably distributed over the plate at regular, grid-spaced intervals and are explained in more detail in the description.

Essential to the invention is the design of the holding devices, which are to be produced inexpensively on the one hand as a plastic injection-molded part, and on the other hand are intended to provide a reliable holder even when subjected to considerable stresses due to heat, pressure and displacement forces. The built-in element according to the invention accordingly has holding devices which have four fingers protruding from the base, rotationally symmetrically distributed and pointing to the center of the base with a curved, resilient end part, a recess being arranged in each case in which the heating tube is held by clamping.

When manufacturing the built-in elements, the actual panel is preferably first made without the holding device. Holding devices with a base plate or with a base ring can be provided. Correspondingly, the surface has depressions for inserting parts of the holding devices. These recesses accommodate the holding devices, which are welded, glued or held in them by a force-fit connection.

Finally, it is also proposed that protrusions from the material of the element protrude on the surface of the built-in element outside the course of the heating pipes to be installed. These bumps have the advantage that, for example, running boards and the like can rest on them during assembly.

• Figur 1a ein Einbauelement gemäß Erfindung in verkleinerter Darstellung, von oben gesehen ;
• Figur 1 b eine Schnittansicht gemäß Schnitt B ... B in Figur 1a ;
• Figur 2a eine andere Ausführungsform des Einbauelementes mit über die Fläche verteilten Höckern ;
• Figur 2b eine Schnittansicht gemäß B ... B in Figur 2a ;
• Figur 3 ein Ausführungsbeispiel für eine Haltevorrichtung ;
• Figur 4 ein weiteres Ausführungsbeispiel für eine Haltevorrichtung in einer anderen Einbettung ;
• Figur 5 ein Verlegebeispiel mit Vorlauf- und Rücklaufanschluß.

Further details of the invention are described with reference to exemplary embodiments shown in the drawing. The individual figures show:

• Figure 1a shows a built-in element according to the invention in a reduced view, seen from above;
• Figure 1 b is a sectional view according to section B ... B in Figure 1a;
• Figure 2a shows another embodiment of the built-in element with bumps distributed over the surface;
• Figure 2b is a sectional view according to B ... B in Figure 2a;
• Figure 3 shows an embodiment of a holding device;
• Figure 4 shows another embodiment for a holding device in another embedding;
• Figure 5 shows an installation example with flow and return connection.

FIGS. 1a and b show a first exemplary embodiment of a built-in element made from heat-insulating materials in accordance with the invention. Dimensions of 100 x 66.7 cm have been chosen for the exemplary embodiment. The installation element consists of a plate 1 with holding devices 2 attached to it. As can be seen from the sectional view in FIG. 1b, the plate 1 has a two-layer structure made of a polystyrene foam with two different structures. The upper layer 3 preferably consists of a polystyrene thermal insulation mass, while the lower layer 4 forms a thermal and impact sound insulation zone. The values for such polystyrene foams are defined in DIN regulations 4108 and 4109. However, in the present case they do not form the actual subject of the invention.

The holding devices 2 are embedded in the upper layer 3 distributed over the plate. The holding devices have the shape shown in FIG. 3, modifications being possible which are described further below.

While according to the prior art mentioned above over the entire length and width of the built-in elements. extending webs with recesses are provided, the holding devices 2 are individually distributed in a punctiform manner over the surface of the installation element in the embodiment described here. They are each located in a series of several straight lines parallel to the sides of the installation element (reference numerals 5, 5a, 5b, 5c in FIG. 1).

A heating tube 8, preferably made of a heat-resistant plastic, is laid in the upwardly open recesses of the holding device and is held in a clamping manner. Curvatures, as in FIG. 9, can also be easily overcome by inserting the holding device according to the invention at the apex of the curvature.

The location and density of the installed heating pipes can vary greatly, with the heating engineer being given many options for covering the heat requirements. The distribution of the holding devices on the built-in element is based on a grid which is based on a basic dimension which, when extended n times, results in a round dimension of 1.00 or 2.00 m.

It can also be seen from FIGS. 1a and b that support webs 11 for the heating pipes 8 are provided between the holding devices and parallel to the sides of the installation element and distributed over the surface. These support bars have the task of keeping the heating pipes above the remaining level of the surface of the element, so that when the installation elements are poured into the screed, these can completely enclose the heating pipes. This creates an excellent thermal contact.

• Auf eine vorhandene Betondecke werden die Elemente flächendeckend aufgelegt. Zum Abgleich der bauseits vorhandenen Abmessungen wird entlang der Stege 11 die Platte beschnitten. Dabei ergibt sich der Vorteil, daß die Auflagestege 11 neben den Halterungsaufgaben auch ein visuelles Hilfsmittel für die Aufteilung der Platte bilden. Dem Handwerker «vor Ort» ist damit eine weitere Arbeitserleichterung gegeben. Er hat dabei auch noch den Vorteil, daß ein Schnitt durch die Platte praktisch durch ein homogenes Material geführt werden kann. Sollte ein Schnitt gerade durch eine Haltevorrichtung geführt werden, so kann diese ohne weiteres durch Herausdrehen entfernt werden.

The installation of the elements according to the invention for liquid surface heating is as follows:

• The elements are placed all over an existing concrete ceiling. The plate is trimmed along the webs 11 to adjust the dimensions on site. The advantage here is that the support webs 11 form a visual aid for dividing the plate in addition to the mounting tasks. This further eases work for the craftsman “on site”. It also has the advantage that a cut through the plate can practically be made through a homogeneous material. If a cut is being made through a holding device, it can be easily removed by unscrewing.

After covering the concrete ceiling with the elements, the heating pipes are laid on the installation elements by pressing them into the holding devices to be described and holding them by clamping jaws. After connecting and fixing the heating pipe, the liquid screed can be poured on, which can also spread underneath the pipes. After the screed has solidified, the floor can be walked on.

For use in so-called drywall construction or in prefabricated house construction, it is necessary to use the built-in elements according to the invention in another embodiment. In these buildings, a further floor layer is applied to a load-bearing ceiling layer, for example made of concrete, which consists, for example, of a thin chipboard with a carpet coating. Potting with screed is not intended. In this case, the embodiment according to FIG. 2a / b is used. With this built-in element, numerous bumps are provided distributed over the surface, which also adapt in size to the grid dimension, as is already provided for the built-in element according to FIG. 1. Numerous square bumps 13 and half-sized bumps 14 are distributed such that free lanes 15, 16 are left open, in which a heating tube 8 can be laid. The same holding devices are provided as in FIG. 2. It goes without saying that there is no sealing on the support ridges, since in this case the heating pipes are flushed free of air as possible so that heat is transferred to the floor above.

Figure 2b shows the position of the heating tubes and the height of the bumps ^13. It can be seen that the flat top of the bumps ends approximately at the height of the apex of the pipes laid.

In the further Figures 3 and 4, exemplary embodiments for the holding devices are shown. All holding devices 2 and 20 have in common that they consist of a base 21 (or 21 ') with an upstanding rim 22, in which at least one recess 7 is incorporated for fastening heating pipes. According to Figure 3, an element is selected which consists of a wide foot piece which is formed in the form of a ring from which four fingers 23 project upwards, which are distributed rotationally symmetrically over the base and with the curved, resilient end part which is used for Center of the base shows are provided. The recesses are stretched between the fingers 23.

The heating pipes are clamped into these recesses. In each case, recess recesses lying in alignment lie opposite one another, there being two paths arranged at 90 ° crosswise for the pipe to be inserted.

As can be seen from FIG. 4, the base 21 'of the holding device is embedded in the polystyrene foam material, which is preferably done directly when the sheet is being foamed.

However, it has proven to be useful to first refrain from installing the holding elements during transport and storage of the mounting elements. These will only be added later Lich inserted into prefabricated recesses 25 and glued there, as can be seen from FIG. The holding elements 20 according to FIG. 4 therefore consist of a similar finger arrangement (reference number 23) as in FIG. 3, but the base consists of a simple, cylindrical ring, which can be inserted into a corresponding circular recess 25. The recesses are available in the plates supplied. When installing the panels, the elements are inserted there. This has the further advantage that when the heating tube is installed, in which not all holding devices are used, they do not have to be installed at all, so that there is a further reduction in the cost.

The choice of materials for the actual panel and for the holding devices is essentially based on the requirements of the building regulations. In addition to organic plastics, inorganic materials such as rock wool or pressed minerals can also be used as the material. The holding devices are preferably made of plastic. However, it is also possible to produce holding devices according to the invention from metal. The heating pipes are anchored by snapping the pipe into the recesses, the latter being dimensioned such that their side areas extend somewhat over the greatest width of the pipe. It is possible to simply press the heating pipes into the recesses or snap them into place. However, it is also possible to deviate from this design by only inserting the tubes into the cutouts and then fastening them with additional parts.

Another advantage is that the holding devices 2 or 20 can each be colored differently. FIG. 6 schematically shows a covering of a room composed of many elements 1. This results in different rows of holding devices 2 colored red and blue, represented here by crosses. The special arrangement in a staggered form in the form of a regular grid, in which four holding devices of one color each include a holding device of another color exactly centrally between them, enables only red holding devices to be used in the design of the flow pipes 8 'and the return pipes 8 "only blue ones can be used. That makes the laying work much easier.

Claims (4)

1. A mounting element (1) prefabricated from heat insulating materials, such as polystyrene foam or the like, for floor heating systems, on which mounting element (1) heating tubes (8) for liquids may be installed and mounted with the aid of holding devices (fixtures) (2, 20) having upwardly opening recesses (7), characterized in that said holding devices (2, 20), in the form of separate holding devices, comprise a base (21) provided with an upwardly protruding rim (22) having two pairs of opposingly disposed recesses (7), whereby a pair of passages intersecting each other under 90° angles, are defined for the heating tube (8) to be inserted into the recesses.

2. The mounting element according to claim 1, characterized in that said holding devices (2, 20) include four fingers (23) projecting upwardly from said base (21), which fingers are distributed or spaced in axially symmetrical fashion and each directed towards the center of said base with a curved, resilient end portion, wherein a pair of said fingers each define between them a recess (7) in which said heating tube (8) is clampingly retained.

3. The mounting element according to claim 1, characterized in that the surface of said mounting element (1) is formed with indentations (25) for inserting parts of said holding device (20).

4. The mounting element according to claim 1, characterized in that the surface of said mounting element (1) is provided with protuberances (13, 14) formed integrally with said mounting element and disposed outwards of the path of extension of said heating tubes to be installed.

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