EP4040051A1 - Intermediate product for manufacturing an area heat exchanger and the like - Google Patents

Abstract

The invention relates, among other things, to an intermediate product (10) for the production of a surface heat exchanger (26), in particular for air conditioning a building, comprising a carrier plate (11) on one side (12) of which a pipe system (13) for conducting a medium is fixed and on its on the other side (19) a prefabricated adhesive tape (31) with a manually removable outer protective layer (21) is arranged, the adhesive tape (31) being designed without a carrier.

Description

The present invention initially relates to an intermediate product for the production of a surface heat exchanger.

Such intermediates are known in principle from the prior art, for example from DE 10 2015 008 082 A1 the applicant. There, an intermediate product is described which can be glued in a holding cassette or a so-called "sail", the holding cassette in turn being attached to a ceiling or wall of a building space for air conditioning. The side of the holding cassette facing the interior of the room thus blinds or conceals the intermediate product attached to the other side of the holding cassette.

In this case, the intermediate product can in particular be produced at a different location from the holding cassette and then brought to the assembly site in order to be glued to the holding cassette only there.

The intermediate product therefore has a protective layer covering the adhesive layer of the intermediate product, in particular for transport.

The adhesive layer is located on the intermediate product on a first side of a carrier plate, with a pipe system being fixed on the opposite other side of the carrier plate, in particular with the aid of a heat-conducting element. A cool or heated medium will later flow through the pipe system when the surface heat exchanger is installed and finished.

In the state of the art, it can basically happen that cavities appear between the adhesive layer and the protective layer, which in particular can counteract a later adhesive effect.

It is therefore also known from said prior art document to provide an adhesive tape that already has an (integrated) protective layer instead of a manually applied adhesive layer and a separate protective layer.

Such double-sided adhesive tapes typically consist of a central carrier which is coated on both sides with an adhesion promoter (so-called primer) in order to hold an adhesive on each of its sides. A corresponding removable protective layer is then located on the outside of at least one of the adhesives.

Even if such a solution has proven to be very manageable and advantageous in practice, there is a constant need for a further optimized intermediate product or surface heat exchanger from the person skilled in the art.

The invention solves the problem with the features of claim 1, in particular with those of the characterizing part and is accordingly characterized in that the adhesive tape used is designed without a carrier.

In other words, the idea of the invention consists in using what is known as a transfer adhesive tape as the prefabricated adhesive tape of an intermediate product.

Such adhesive transfer tapes may be known in principle from the prior art, but their use in Surface heat exchangers (or at least intermediate products for the production of surface heat exchangers) are not.

The applicant has recognized that turning away from the basic teaching of using a double-sided pressure-sensitive adhesive tape with a carrier that is as robust and stable as possible offers the significant advantage of even better heat transfer between the carrier plate and the holding cassette, with the use of a actually more filigree (and therefore carrier-free adhesive transfer tape (which is not considered to be so stable and robust) actually opposes the primary aim of as secure a hold as possible.

However, extensive test series have shown that, contrary to expectations, the use of a carrier-free (transfer) adhesive tape is sufficiently safe and also offers significantly better thermal conductivity properties.

The thermal conduction properties of such a tape are more advantageous since heat that is transferred between the carrier plate or the pipe system on the one hand and the holding cassette on the other hand does not have to be additionally transported through the carrier, layer or core.

The carrier-free adhesive tape also has a smaller thickness overall, so that the transmission or transport path for the heat or temperature properties is shorter and therefore optimized.

While previously used adhesive tapes of the prior art had a carrier made of paper, fleece, film, foam, composite material or the like, the adhesive tape used according to the invention advantageously consists only of an adhesive body and a protective layer covering it on one side, for example made of (special) paper, foil or something similar.

In particular, a carrier is not provided. Advantageously, however, the adhesive tape is also primer-free.

The adhesive tape is typically in one piece and, to produce the intermediate product, can have been pulled off and severed from a roll or a corresponding stamped part in the manner of a roll, or it can also have been severed from a sheet or the like.

In this context, prefabricated means in particular that the adhesive tape is essentially present as a prepared body, preferably already has a protective layer and together with this forms a unit.

This unit may have been previously severed from a roll or sheet, or the like, as described.

Therefore, according to the invention, it is a question of double-sided adhesive tape (also called double-sided adhesive tape) which has no backing.

It is particularly important that the adhesive tape, with the exception of the protective layer, is continuously adhesive, i.e. has no non-adhesive core.

It can therefore be transfer adhesive tape, which consists only of an adhesive film with a protective layer, or foam adhesive tape, which - again with the exception of the protective layer - consists of adhesive through and through (in the latter case, the adhesive tape can consist exclusively of foam and the protective layer exist or from self-adhesive foam plus additional adhesive film and protective layer).

However, adhesive tapes of the first type, ie those which only comprise an adhesive film together with a protective layer, are particularly advantageous because they are equipped in particular with particularly good thermal conductivity properties.

Merely for the sake of completeness, it is pointed out that the adhesive tapes, which are used in the intermediate product according to the invention, before they are added to the intermediate product, of course also, in addition to the outer protective layer, have another protective layer on the other side (e.g. in the form of a release layer or similar) (so-called liner), which essentially prevents adhesive tape on a roll or elsewhere from sticking to the overlying layer. Of course, such liners can no longer be found in an intermediate product because, if present, they were pulled off before the adhesive tape was attached to the intermediate product or glued to the carrier plate.

The outer protective layer can in particular be silicone paper, since this is particularly well suited to protecting the adhesive body or adhesive film well and, on the other hand, being able to be removed again manually, even after a long period of time.

Merely for the sake of completeness, it should also be noted with regard to the protective layer that the protective layer can of course be formed in one piece or alternatively also in several parts (for example consisting of several strips arranged next to one another or the like).

By peeling off or removing the protective layer, the adhesive body of the adhesive tape is exposed and the rest of the intermediate product (i.e. the intermediate product without the protective layer) can then be glued to the holding cassette. For this purpose, the holding cassette typically has a fastening surface in its interior which is designed to be flat.

Typically, exactly one surface heat exchanger is installed in a holding cassette. In alternative designs, however, it is also possible to incorporate two or more surface heat exchangers in a holding cassette, the surface heat exchangers in this case preferably being fluidically connected to one another.

The holding cassette can be associated with holding means for attachment to a wall or to a ceiling of a building space in a conventional manner. In addition, depending on customer requirements and use, a cassette can also have so-called acoustic perforations. The cassette is not closed in this sense, but has perforations on its surface, ie in particular in the area of the fastening surface, which are typically arranged regularly and in the form of a grid. In this case, it makes sense that the intermediate product to be introduced into the holding cassette also has congruent perforations, at least in the area of the carrier plate and possibly the adhesive tape/body. In particular, the protective layer does not need to have these perforations, since they are peeled off or removed before the surface heat exchanger is completed.

A surface heat exchanger produced in this way is usually installed together with a plurality of identical surface heat exchangers on a ceiling or a wall of a building, as seamlessly as possible, in order to offer a homogeneous appearance. The pipe systems of the individual surface heat exchangers can be fluidically be connected, in particular through openings in the side walls of the holding cassette or the like.

Such a large number of surface heat exchangers can also be referred to as a climate ceiling or climate wall. It serves to air-condition the room, ie in particular to heat or cool the room.

In the case of a desired heat effect, a hot medium, in particular water, is typically conducted through the pipe system. If cooling is desired, a cold medium, also preferably (chilled) water. The pipes consist in particular of copper, but can also consist of any other suitable metal or other material, such as a suitable plastic. Typically, the tubes of a single surface heat exchanger have a meandering shape, ie they consist of sections that are straight and curved sections. Advantageously, the straight sections have a D-shape in cross section and the round sections have a circular shape in cross section.

The pipe system is typically fastened to the carrier plate with the aid of heat conducting plates, which are either glued to the carrier plate (preferably also with carrier-free adhesive tape) or are fastened in some other, in particular mechanical, way (e.g. positively). In particular, several strip-like heat conducting plates can be provided, which are further assigned in particular to the straight tube sections and overlap these on both sides or at least on one side.

As already described, the protective layer can be removed from the intermediate product in order to assemble the surface heat exchanger and this can then be glued manually, in particular under pressure, over the entire surface or snugly to the fastening surface of the holding cassette.

The holding cassette is typically made of metal or steel and can in particular also be designed to be magnetic. It can also be called a sail and the heat exchanger using it is also called a cassette-type heat exchanger. The heat conducting sheet(s) usually consist of materials with good thermal conductivity, so that in particular a heat conducting function is provided in order to transfer the temperature of the medium to the carrier plate. In addition to this heat conducting function, the heat conducting sheet naturally also has the function of fixing the pipe system (or a pipe system section) and at the same time pressing it against the carrier plate under constant tension. Therefore, the heat conducting sheet is typically made of spring-hard metal.

Due to the metal carrier plate, which is at least 3 mm thick (steel can also be used if necessary), the temperature can be transferred even more optimally. The metal support plate preferably has a thickness of at least 0.5 mm and more preferably at least 0.6 mm. Sheets that are too thin, such as those known from the non-generic area of refrigerator technology, cannot be used because on the one hand they bend easily and on the other hand do not allow for a decent heat transfer, which is particularly important for surface heat exchangers in the field of building air conditioning.

In the case of the surface heat exchanger used and assembled here, the carrier plate together with the pipe system and heat conducting plate is assigned to the inside of the cassette facing away from the room.

According to a particularly advantageous embodiment of the method according to the invention, the carrier plate is made of aluminum, which enables particularly good thermal conductivity.

According to a further advantageous embodiment of the method according to the invention, the outer protective layer, which covers the adhesive layer, is designed in the form of a film or sheet and can be removed manually without tools. The protective layer can therefore be a film or a (silicone) paper or the like, which is suitable for being manually removable from the adhesive body of the adhesive tape.

Provision is advantageously made for the protective layer to have a pulling surface or gripping surface. In the simplest case, this pulling surface can be the rear side of the protective layer, which can be gripped behind with a fingernail, for example. In this sense, for example, the protective layer can be easily pulled off at one corner and then grasped from behind. Advantageously, however, it can also alternatively be provided that the protective layer protrudes somewhat beyond the adhesive body in order to provide a user with a contact surface. Alternatively, the protective layer can of course also provide a separate tab, in particular in a corner area, which makes it easier to pull off or remove the protective layer.

According to a particularly advantageous embodiment of the invention, the carrier plate looks black on the side having the adhesive layer after the protective layer has been removed. This enables optical advantages, especially if the carrier plate including the pipe system (i.e. the rest of the intermediate product after the protective film has been removed) is to be glued directly to the holding cassette (i.e. without a black fleece in between).

This embodiment of the invention is particularly suitable for cases in which the holding cassette is not closed but perforated in the region of its attachment surface and--as described--no fleece is used. In this case, the effect of a black color can be achieved, for example, by a separate layer underneath a transparent adhesive tape. Alternatively, a black-colored adhesive tape can of course also be used.

According to a further advantageous embodiment of the invention, the holding cassette has both a width and a length of at least 50 cm. Retaining cassettes with smaller dimensions have proven to be unsuitable for assembly, in particular for optical reasons, but also for reasons of ease of assembly and stability.

Typical holding cassettes have a width and a length of about 60 cm. Alternative holding cassettes that are not square and are more elongated can have dimensions of 60×120 cm, for example.

In order to be introduced into holding cassettes dimensioned in this way, the carrier plates of the intermediate product typically have dimensions with edge lengths of about 30 to 120 cm. Typically, the edge length of the corresponding carrier plate must be at least slightly less than the edge length of the holding cassette, so that the carrier plate and thus the rest of the intermediate product can be introduced into the holding cassette without any problems after the protective layer has been pulled off.

Typical carrier plates have dimensions of 30×30 cm to 50×50 cm, for example. However, for larger sails are also self-evident larger carrier plates can be provided. However, both edge lengths are typically at least 20 cm or 30 cm long, but typically do not exceed 250 cm in length/width.

In particular, after removing the protective layer, the intermediate product is bonded undeformed to the fastening surface. In this sense, after the protective layer has been removed, it is actually not, strictly speaking, the intermediate product, but rather the rest of the intermediate product. However, in the context of comprehensibility, in this case (once) there should also be talk of an intermediate product. In any case, the remainder of the intermediate product or the carrier plate is glued undeformed to the fastening surface, so that for example the carrier plate is not kinked or angled or the like for this purpose. This is usually not even possible due to the greater material thickness. Since the carrier plate together with the adhesive body of the adhesive tape extends essentially along one plane, the carrier plate is also glued essentially along one plane to the planar fastening surface.

The remainder of the intermediate product is preferably glued to the fastening surface essentially over its entire surface, it being possible, for example, for the adhesive body to be applied continuously and without gaps to the carrier plate.

Alternatively, the adhesive body of the adhesive tape can also have perforations or the like, in particular if perforations are also provided either in the fastening surface of the holding cassette and/or on the carrier plate. However, this is still considered to be essentially the entire surface within the meaning of the present invention. This is to be understood in particular as not merely adhering at certain points.

According to the invention, it can be advantageous for the carrier plate to have an essentially continuous adhesive body for this purpose only on one side. No continuous adhesive body is therefore provided on the other side assigned to the pipe system. Although the heat conducting plates can be attached to the other side with adhesive or adhesive tape, this is usually only in the form of strips and not continuously.

According to the invention, the side of the intermediate product or the remainder of the intermediate product that has the adhesive layer is preferably glued to the fastening surface in a plane-parallel manner. In this sense, two surfaces which extend essentially along a parallel plane, namely the fastening surface and the adhesive tape or the underside of the carrier plate, are moved towards one another as parallel as possible, so that the two planes come to rest on one another. A user can then manually help to bond the two surfaces by applying pressure.

Advantageously, neither the said side of the intermediate product or the said side of the carrier plate nor the fastening surface have any recesses. It is true that minor perforations, in particular grid-shaped acoustic perforations, can be provided. Recesses in the sense that either the fastening surface or the carrier plate has areas in the manner of deep-drawn, recessed areas would probably not allow full gluing.

According to a further particularly advantageous embodiment of the invention, the adhesive tape is designed to be essentially free of cavities in the area between the protective layer and the adhesive body.

This is intended in particular to distinguish it from a manually applied adhesive layer disclosed in the prior art mentioned represent, which is then provided with a separate protective layer. In this case, the surface of the adhesive layer can in particular be inhomogeneous and the planar or smooth protective layer cannot nestle flat against the adhesive layer, so that said cavities are formed.

The invention thus offers the advantage that a prefabricated adhesive tape is used in which cavities of this type can be ruled out from the outset.

"Essentially free of cavities" means that no relevant cavities exist. In the microscopic sense, cavities can be found everywhere, but these are not meant. Rather, what is meant are cavities that can arise when separate adhesive layers are applied manually or by machine and are provided with a separate protective layer.

In this sense, the area between the protective layer and the adhesive body can be designed without cavities.

According to the most preferred embodiment of the invention, the adhesive tape consists of a protective layer and an adhesive body. So it includes neither a carrier nor a primer or the like.

The adhesive body preferably has a thickness of less than 0.1 mm, more preferably less than 0.07 mm, for example 0.06 mm.

The adhesive body preferably has a thickness of more than 0.01 mm, more preferably more than 0.05 mm.

Further advantageously, the adhesive body can have or consist of acrylate adhesive. In particular, it can be a modified acrylate.

According to a further embodiment, the adhesive body can also have or consist of foam. The adhesive body can in particular be acrylate foam, which in particular is designed to be continuously adhesive.

According to the most advantageous embodiment of the invention, the adhesive tape is designed as a so-called transfer adhesive tape. This is to be understood in particular as a distinction from a double-sided pressure-sensitive adhesive tape with a backing, as is used in the prior art.

The adhesive tape can have an overall thickness of less than 0.2 mm, preferably less than 0.15 mm, in particular about 0.14 mm.

The total thickness can preferably be more than 0.1 mm.

In this sense it can be stated that according to the most preferred embodiment of the invention the adhesive body can have a smaller thickness than the protective layer.

According to the invention, the intermediate product can be designed in such a way that exactly one prefabricated adhesive tape, in particular with a manually removable outer protective layer, is provided on the side of the carrier plate on which the adhesive tape is arranged.

Alternatively, of course, several, ie at least two, adhesive tapes can be provided instead, for example if these are designed in strips (and arranged next to each other).

According to an advantageous embodiment of the invention, this is characterized in that the tube system for conducting the medium is fixed by at least one heat-conducting element to the carrier plate. In particular, the heat-conducting element is designed as a heat-conducting sheet. In this case, the heat-conducting element can be fixed to the carrier plate with another prefabricated, carrier-free adhesive tape.

According to a further advantageous embodiment, the invention can be characterized in that the pipe system for conducting the medium is fixed directly to the carrier plate.

According to a second aspect of the invention, the underlying object is achieved by a surface heat exchanger according to claim 12.

In other words, this aspect of the invention relates to a surface heat exchanger in which an intermediate product according to the invention is glued into a holding cassette, naturally after the protective layer has been removed.

The adhesive tape according to claim 12 therefore has in particular no protective layer (anymore).

According to a further aspect of the invention, the object is achieved by the features of claim 13, which claims a surface heat exchanger in which the heat conducting element is attached to the support plate indirectly or with the aid of a carrier-free adhesive tape is immediately determined. According to this aspect as well, the adhesive tape does not (any longer) have an outer protective layer.

The heat-conducting element can in particular be a heat-conducting sheet metal which is bonded to the carrier plate with an adhesive tape or strip without a carrier. The heat conducting sheet can be glued directly to the carrier plate or, for example, to a layer arranged thereon, in particular made of fleece.

Furthermore, the object on which the invention is based is also achieved by the features of claim 14, which essentially claims a surface heat exchanger in which both the adhesive tape for fixing the carrier plate in or on a holding cassette and the adhesive tape for fixing the heat-conducting element on the carrier plate are carrier-free adhesive tape are formed.

Accordingly, both adhesive tapes can come from the same source, ie in particular the same roll or the same sheet or the same stock or the like, and in particular can have an identical structure and/or an identical thickness.

Finally, the object on which the invention is based is also achieved by a surface heat exchanger according to claim 15, according to which an adhesive tape which fixes an outer decorative layer to the carrier plate is designed without a carrier.

According to this aspect of the invention, the idea of the invention is to provide an intermediate product as known from claims 1 to 11 with a decorative layer after removing the protective layer (in the area where the protective layer was removed). The decorative layer is therefore attached in particular to the carrier plate with the aid of the carrier-free adhesive tape.

In this way, an intermediate product modified in this way can be used directly as a surface heat exchanger (in particular without introducing the carrier plate into an additional holding cassette).

This is in particular a non-metallic decorative layer.

To put it another way, the decorated carrier plate is used directly as a surface heat exchanger.

A surface heat exchanger provided in this way is already sufficiently decorative in itself and therefore does not need to be additionally provided with plasterboard and/or filled.

By choosing a non-metallic decorative layer, the look can be sufficiently contrasted with the sometimes dull metal look of conventional metal cassettes.

It is also possible to save on components, since a further metallic holding cassette is not required in addition to the carrier plate.

On the other hand, this aspect of the invention can also include the fact that the carrier plate is provided by a (conventional) holding cassette.

According to the invention, the decorative layer is arranged on the outside of the surface heat exchanger, i.e. it represents an outer layer of the surface heat exchanger.

Consequently, the decorative layer is arranged in such a way that the eye of an observer falls primarily on the decorative layer, at least in one possible viewing direction.

This effect is used to mount the surface heat exchanger in a (building) room in such a way that the outer decorative layer points towards the interior of the room, ie towards an observer located in the room.

According to the invention, a decorative layer represents a layer which appears visually more attractive, in particular in contrast to a bare carrier plate or holding cassette or protective layer.

Typically, metallic layers of carrier plates or holding cassettes are often perceived as "cool".

The decorative layer, on the other hand, can have a more visually appealing effect, for example due to a pattern and/or its structure and/or its choice of material.

In this sense, the decorative layer can, for example, have a pattern or a special relief, but this does not necessarily have to be the case. In particular, the decorative layer can also have a decorative effect simply because of its structure or its material.

Alternatively, the decorative layer can also be (decoratively) printed, that is to say have a print which (only for example) can represent a pattern.

The decorative layer is typically a pliable, planar body, for example a textile Flat structures or (flat) structures made of paper, cardboard, foil or the like.

Particularly advantageously, the textile fabric or the decorative layer can consist of a fleece, in particular an acoustic fleece.

Alternatively, however, wallpaper, for example woodchip wallpaper or non-woven wallpaper or the like, can also be provided as a decorative layer.

In other words, the front side of the carrier plate can be "wallpapered" with a planar, in particular flexible, body using the carrierless adhesive tape.

Advantageously, the decorative layer can provide a pattern, more advantageously a pattern that can continue on other surface heat exchangers that are preferably to be arranged adjacent.

For the purposes of the present invention, a "non-metallic" design of the decorative layer means that it does not predominantly consist of metal. However, the decorative layer may contain minor metallic elements such as metallic fibers.

In this case, the decorative layer can consist in particular of fleece or non-woven material, ie a so-called “non-woven”. The decorative layer is preferably formed from an acoustic non-woven fabric, which is characterized in particular by the fact that it has particularly good acoustic absorption properties.

The decorative layer can have, for example, an openly perforated area of at least 5%, further at least 10%.

With regard to Claims 12 to 15, it should be noted that all of the claims features and advantages described in connection with the intermediate product can of course also be transferred to these Claims 12 to 15 and are to be considered disclosed in connection with them. Merely for the sake of clarity, they are not explicitly repeated here in connection with the surface heat exchanger claims. Of course, the same also applies the other way round, ie with regard to the advantages described in relation to the surface heat exchanger claims with regard to the intermediate product claims.

An essential difference, also with regard to the thickness of the adhesive tape, is that the claims directed to the surface heat exchanger all relate to adhesive tapes from which the protective layer has already been removed or which no longer have a protective layer, while the main claim relates to an adhesive tape with the protective layer still attached.

Fig. 1

in einer Abfolge von schematischen Aufsichtsansichten die grundsätzlichen Komponenten bzw. den Herstellungsablauf eines erfindungsgemäßen Zwischenproduktes gemäß der vorliegenden Erfindung, wobei die Fig.1c' die Klebestreifen am Wärmeleitblech verdeutlicht und Fig. 1e dann die Unteransicht des Zwischenproduktes darstellt,

Fig. 2

in einer sehr schematischen Ansicht, etwa entlang Ansichtspfeil II in Fig. 1, ein Schnitt durch das erfindungsgemäße Zwischenprodukt, unter Fortlassung einiger Rohrabschnitte,

Fig. 3

in einer Ansicht gemäß Fig. 2, das Zwischenprodukt bei teilabgezogener Schutzschicht,

Fig. 4

in einer Ansicht gemäß Fig. 3 das Zwischenprodukt bzw. dessen Rest bei abgezogener Schutzschicht und einem Einbringen in eine Haltekassette,

Fig. 5

in einer Ansicht gemäß Fig. 4 ein fertiggestellter Flächenwärmetauscher gemäß dem erfindungsgemäßen Verfahren,

Fig. 6

in einer sehr schematischen, seitlichen Schnittansicht ein Schnitt durch einen Gebäuderaum, in welchem der fertiggestellte Flächenwärmetauscher gemäß Fig. 5 mittig montiert ist, unter Fortlassung des Zwischenprodukt(rest)es aus Gründen der Übersichtlichkeit,

Fig. 7.

eine sehr schematische, perspektivische Ansicht eines doppelseitigen Klebebandes, wie es im Stand der Technik benutzt wird,

Fig. 8

eine sehr schematische, perspektivische Ansicht eines trägerfreien doppelseitigen Klebebandes, wie es von der Erfindung genutzt wird, der Übersichtlichkeit halber jedoch nicht die korrekten Bemaßungen und Schichtdicken betreffend, und

Fig. 9

in einer Ansicht, etwa gemäß Fig. 1e, in Unteransicht ein erfindungsgemäßer Flächenwärmetauscher mit an der Trägerplatte angebrachter Dekorschicht.

Further advantages and refinements of the invention result from the non-cited subclaims and from the description of the figures which now follows. In the figures show:

1

in a sequence of schematic top views, the basic components and the manufacturing process of an intermediate product according to the present invention, wherein the 1c' the adhesive strips on the heat conducting plate clarified and Fig. 1e then displays the bottom view of the intermediate product,

2

in a very schematic view, roughly along view arrow II in 1 , a cut through that intermediate product according to the invention, with the omission of some pipe sections,

3

in a view according to 2 , the intermediate product with the protective layer partially removed,

4

in a view according to 3 the intermediate product or its remainder with the protective layer removed and placed in a holding cassette,

figure 5

in a view according to 4 a finished surface heat exchanger according to the method according to the invention,

6

in a very schematic, lateral sectional view, a section through a building room, in which the finished surface heat exchanger according to figure 5 is mounted in the middle, omitting the intermediate product (rest) for reasons of clarity,

7

a very schematic, perspective view of a double-sided adhesive tape as used in the prior art,

8

Fig. 12 is a very schematic perspective view of a linerless double-sided adhesive tape as used by the invention but omitting the correct dimensions and layer thicknesses for the sake of clarity, and

9

in a view, roughly according to Fig. 1e , in a view from below, a surface heat exchanger according to the invention with a decorative layer attached to the carrier plate.

Exemplary embodiments of the invention are described by way of example in the following description of the figures, also with reference to the drawings. For the sake of clarity - even if different exemplary embodiments are concerned - the same or comparable parts or elements or areas are denoted by the same reference symbols, sometimes with the addition of small letters or apostrophes.

Features that are only described in relation to one exemplary embodiment can also be provided in any other exemplary embodiment of the invention within the scope of the invention. Such modified exemplary embodiments are included in the invention, even if they are not shown in the drawings.

All disclosed features are essential to the invention. The disclosure of the application also includes the disclosure content of the publications cited and the prior art devices described in full, also for the purpose of including one or more features of these documents in one or more claims of the present application.

First shows the sequence of figures figure 1 the manufacturer's production of an intermediate product 10 according to the invention (cf. Figures 1d and 1e ).

For its production, for example in the manufacturer's production facilities, identification is required Fig. 1a first a support plate 11 is used. The carrier plate 11 is in Fig. 1a shown with its front 12 and consists essentially of a sheet metal, such as aluminum. The carrier plate 11 preferably has a material thickness of at least 0.3 mm, in the present exemplary embodiment approximately 0.5 mm or 0.6 mm. This material thickness ensures, in particular, that the carrier plate 11 can also be described as a transfer plate, since the material thickness provided enables optimal heat conduction in the carrier plate.

On the front 12 of the carrier plate 11 is identified Fig. 1b a pipe system 13 is provided in the manner of a pipe meander. The pipe system 13 shown here has in particular four straight pipe sections 14a, 14b, 14c, 14d, which typically have a D-shaped cross section. The three essentially arcuate sections 15a, 15b, 15c arranged in between can, on the other hand, retain a round cross section, for example. This pipe system 13 is connected with the help of in 1c shown heat-conducting elements, for example in the form of heat-conducting plates 16a, 16b, 16c, 16d Fig. 1d fixed to the support plate 11. The heat conducting plates 16a, 16b, 16c, 16d are here in particular designed in the form of strips and can each overlap a straight pipe section 14a, 14b, 14c, 14d and fix it on the carrier plate 11.

In this sense, in the present exemplary embodiment, the curved tube sections 15 are not fixed directly to the carrier plate 11, but only indirectly via the straight sections 14 and the heat conducting plates 16. The heat conducting plates 16 are glued to the carrier plate 11 (in particular on both sides of the covered tube section). . Accordingly, the heat conducting sheets can be, in particular, metal strips with good heat conducting properties.

The intermediate product completed in this way is in Fig. 1d seen in a front view and in Fig. 1e in a rear view.

The rear view according to Fig. 1e shows that the rear side 19 of the intermediate product 10 and thus also the rear side of the carrier plate 11 is provided with a protective layer 17, for example a removable film or a removable silicone-coated paper or the like. The protective layer 17 is part of an adhesive tape 31 and is used to cover and protect a arranged on the back of the intermediate product 10 or carrier plate 11, in the figure 1 almost not shown adhesive body 20 of the adhesive tape 31. With this adhesive tape 31, the intermediate product 10 should be glued to a holding cassette in a manner that will be described later.

Typically, the protective layer 17 has a gripping surface 18 to ensure easy removal or peeling, which can be provided, for example, by an overhanging film area or simply an area of the underside of the film (associated with the adhesive body 20).

A synopsis of 1c and 1c' furthermore shows that the intermediate product also provides for the use of a further carrier-free adhesive tape in the form of adhesive strips 30 in addition to the adhesive tape 31 . The heat conducting elements 16 can also be glued to the front side 12 of the carrier plate 11 with double-sided adhesive tape 30 without a carrier.

1c' clarifies that an adhesive strip 30 can be attached to each of the wing bases 35 of a heat-conducting element 16 . For the purpose of mounting the heat-conducting element 16 on the support plate 11, a protective strip layer 33 can be removed manually, so that the heat-conducting element 16, the pipe system 13 across, on the Front 12 of the support plate 11 can be glued using the exposed strip adhesive body 34.

With reference to 1c' it should be noted that the strip protective layer 33 in the adhesive strip 30' shown on the left is shown already peeled off for reasons of clarity.

Consequently, the adhesive strip 30 can come from the same adhesive tape source as the adhesive tape 31 which is assigned to the other side 19 of the carrier plate 11 . However, it may be made up differently, for example in the form of strips instead of in the form of an arc, or identical strips can be used on both sides of the carrier plate 11, and then typically several on side 19.

The finished intermediate product 10 according to Fig. 1d /e is typically manufactured separately by a surface heat exchanger manufacturer. However, it is to be placed in a holding cassette which, according to the invention, is not located at the manufacturer's location.

This in 1 In this sense, the intermediate product designated 10 represents an easy-to-handle, transportable and easy-to-store unit, which can be moved or transported in a logistically easy manner (since, for example, shipping is possible without the particularly heavy holding cassette).

Typically this will be in 1 The manageable intermediate product designated 10 for the assembly of a surface heat exchanger is then taken to another/remote location, where the completion of the surface heat exchanger takes place (by bringing the intermediate product together with a holding cassette), as the sequence of figures 2 to 5 in particular shows.

Here shows 2 a section through the intermediate product 10 in a sectional view approximately according to the view arrows II in Fig. 1d , but with the omission of two straight pipe sections. Accordingly, are in 2 For the sake of clarity, only two of the actually four existing straight pipe sections 14 of the pipe system 13 are shown as an example. The pipe sections 14 are identified 2 D-shaped in cross section and are attached to the front side 12 of the carrier plate 11 on both sides by the heat conducting plates 16, in the present embodiment (by a protective layer-free, carrier-free adhesive strip 30, 30').

2 also makes clear that the adhesive tape 31 is arranged on the back or underside 19 of the carrier plate 11, the adhesive body 20 of which is covered by a protective layer 21, in particular over the entire surface. The protective layer 21 serves in particular for easier handling of the intermediate product 10 and easier transport, in the sense that the intermediate product 10 does not stick to another object during transport due to the adhesive body 20 .

This in 2 The intermediate product 10 shown is now already at a second location, which can be, for example, the installation location, for example the building room in which the surface heat exchanger is to be installed. In principle, however, the installation location can only be in the sense that the surface heat exchanger is assembled in a neighboring room, neighboring building or in front of the target building or in a spatial section neighboring the target room. Alternatively, the second location can also deviate (slightly) from the assembly location. For example, the finished intermediate product 10 according to 2 are first transported from the location of the manufacturer to a location of a fitter who is based near the installation site.

In any case, as evidenced 3 at a second location, which is advantageously the assembly location, the protective layer 21 or protective film 21 can be easily removed or peeled off manually. In this way, the adhesive body 20 of the intermediate product 10 is exposed. For this purpose, a user can manually reach behind a gripping surface 18 of the protective layer 21 .

After the protective layer 21 has been removed, looking at the underside of the carrier plate 11 can result in a black color impression, for example. This can be produced, for example, by a black-colored adhesive body 20 of the adhesive tape 31, or in an alternative, not shown embodiment, by a separate coating of the underside of the carrier plate 11, which would thus be arranged between the carrier plate 11 and the adhesive body 20, in which case a substantially transparent adhesive body 20 would be used.

The removal of the protective layer 21 according to 3 preferably takes place immediately before the remainder 22 of the intermediate product is glued in or on a holding cassette 23, as is shown in 4 is shown. The remainder 22 of the intermediate product 10, in particular including the exposed adhesive body 20, the carrier plate 11 and the pipe system 13 and the heat conducting plates 16, can then be brought along an insertion direction E to the inside 24 of the holding cassette and attached there with the help of the exposed adhesive body 20 of the adhesive tape 31 , in particular over the entire surface, are glued. This gluing takes place essentially plane-parallel in that the plate plane P is brought plane-parallel to the fastening plane B of the holding cassette 23 until it is glued to a fastening surface 25 of the holding cassette 23 . No tools, aids or the like are usually required for this. A user can do this manually, in particular by Placing the remainder 22 of the intermediate product 10 in or on the holding cassette 23 or the fastening surface 25 exerts pressure approximately along the insertion direction E on the rear side 24 of the carrier plate.

The finished surface heat exchanger is then in figure 5 marked with the reference numeral 26. This has in particular an adhesive tape 32 without a protective layer (which corresponds to the adhesive tape 31 without the protective layer 17, ie the adhesive body 20).

In the Figures 4 and 5 A further exemplary embodiment is not shown, which provides that the fastening surface 25 of the holding cassette 23 is provided by a preferably black fleece arranged in the holding cassette. This optional fleece has, among other things, acoustic and optical properties and can already be introduced into the cassette 23 in a separate method step.

If the completion of the surface heat exchanger 26 according to the Figures 2 to 5 away from the assembly site, the surface heat exchanger 26 can now be brought from the second site, for example the site of the local fitter, to the assembly site, in particular the intended building space. However, if the surface heat exchanger 26 was already completed at the installation site, it can now (as evidenced by 6 ) the final assembly of the finished surface heat exchanger 26 take place.

6 1 shows the surface heat exchanger 26 in a fully assembled state, for which purpose the surface heat exchanger 26 has been attached or fastened to a ceiling 27 of a building room 28 . For reasons of clarity, the surface heat exchanger 26 in 6 but only the holding cassette without the remainder 22 of the intermediate product 10 is shown. Of course However, the fully assembled surface heat exchanger 26 includes all in figure 5 components shown.

To mount the surface heat exchanger 26, the holding cassette 23 can be used, for example, in 6 implied, and in figure 5 have mounting surfaces omitted for the sake of clarity, which in particular are attached to the side edges 29 of the holding cassette 23 (cf. figure 5 ) can connect.

The surface heat exchanger 26 is in 6 together with other surface heat exchangers 26' and 26" mounted in a cascade on the ceiling 27. Complete assembly also includes, among other things, that the surface heat exchanger 26 is connected to the other surface heat exchangers 26' and/or 26" with regard to its pipe system, so that a continuous line of a the pipe system 13 is secured to the ceiling 27 for the fluid flowing through.

With reference to 6 it should be noted that many more or fewer than three of the surface heat exchangers shown can of course be used on the ceiling. In particular, the surface heat exchanger not only, as shown in the sectional view 6 shown, but also be arranged one behind the other with respect to the other spatial direction.

What all forms of arrangement have in common is that the surface heat exchangers 26 form a so-called air-conditioning ceiling, which ensures that the room 28 is air-conditioned. If a cooling medium, for example chilled or cool water, flows through the pipe systems or the pipe system, the air-conditioning ceiling can have a cooling effect. If the room 28, however, are heated, the pipe systems 13 can Are surface heat exchanger 26 with heated medium, such as hot water, flows through.

Only for the sake of completeness is regarding 6 noted that the surface heat exchanger 26 could of course also be arranged on the walls 29 depending on the application.

A typical surface heat exchanger 26 has a width b of about 60 cm, in particular between 50 and 70 cm. In the other spatial direction, the surface heat exchanger 26 can have identical dimensions or, alternatively, typically also dimensions that are approximately twice as long, ie a length of approximately 120 cm or in particular between 100 cm and 140 cm. Typically, exactly one intermediate product (remnant) 22 is arranged or installed within a holding cassette.

Figures 7 and 8 show in a very schematic representation, some in sections, the difference between a double-sided adhesive transfer tape as used according to the invention ( 8 ), and a prior art backed double-sided pressure-sensitive adhesive tape ( 7 ).

While the adhesive tape 31 used according to the invention 8 only has an adhesive body 20 and a protective layer 21 (whereby, for the sake of clarity and because of the schematic representation, these are not shown to scale, in particular with regard to their thickness, and are also not shown in the correct relation to one another), there is a double-sided carrier tape with a carrier, as is shown in 7 is shown, consists of many more layers: it has a central support 36 and a layer of primer material 37 or 37' on both sides. This serves to connect the respective Adhesive masses 38 or 38' on the backing 36. The adhesive tape with backing is also shown to have 7 then a protective layer 21'.

The large number of different layers already gives an idea that the double-sided adhesive tape with backing 7 is thicker overall and has, for example, a total thickness of more than 0.2 mm, while the carrier-free adhesive tape 31, as used in the invention, has a significantly lower total thickness, for example less than 0.15 mm.

Even if this 8 cannot be seen, it can actually be provided that the adhesive body 20 in the adhesive tape 31 has a smaller thickness of, for example, about 0.06 mm than the protective layer 21 (which can consist, for example, of silicone paper and has a thickness of about 0.08 mm may have).

Finally shows 9 another embodiment in a view from below, which is a view according to about Fig.1e corresponds, in which the underside 19 of the carrier plate does not (any longer) have a protective layer, but already has a decorative layer 39 arranged on it.

In the exemplary embodiment shown, this decorative layer 39 is, for example, a fleece, in particular an acoustic fleece.

The decorative layer 39 is shown to have 9 in particular a (in this example checkered) pattern, which can be printed on the decorative layer or the fleece, for example.

Not recognizable is in 9 however, a micro-perforation in the decorative layer 39, which basically an improvement acoustic properties of the entire surface heat exchanger 40 is used.

The decorative layer 39 is glued to the underside 19 of the surface heat exchanger 40, through the 9 adhesive body 20 of the adhesive tape 32 indicated at one corner.

Normally, the decorative layer 39 has, as in 9 shown, of course there is no "dog-ear" in the area of a corner. This illustration is only intended to make it clear that the adhesive body 22 , by means of which the decorative layer 39 is fastened directly to the underside 19 of the carrier plate 11 , is underneath the decorative layer 39 but above the underside 19 of the carrier plate 11 .

As this view of the underside 19 of the support plate 11 or of the illustrated, slightly modified surface heat exchanger 40 shows, this is also an easy-to-handle, ready-to-use and transportable unit that is produced at a first location. A surface heat exchanger 40 according to the invention can therefore be transported to its destination in a logistically easy manner.

The production of such a surface heat exchanger 40 with a decorative layer essentially corresponds to the production as described in 1 is shown, after which, however, the protective layer 17 is peeled off and the decorative layer 39 is attached.

To assemble such a surface heat exchanger 40 with a decorative layer 39, it can have assembly means, for example, or it can interact with assembly means on the room or ceiling side. It is typically not glued into a holding cassette since the underside with the decorative layer 39 should just be visible.

Claims (15)

Intermediate product (10) for the production of a surface heat exchanger (26), in particular for air conditioning a building, comprising a carrier plate (11) on one side (12) of which a pipe system (13) for conducting a medium is fixed and on the other side (19) of which a prefabricated adhesive tape (31) with a manually removable outer protective layer (21) is arranged, characterized in that the adhesive tape (31) is designed without a carrier. Intermediate product (10) according to Claim 1, characterized in that the adhesive tape (31) is designed essentially without cavities in the region between the protective layer (21) and the adhesive body (20). Intermediate product (10) according to Claim 1 or 2, characterized in that the adhesive tape (31) has a protective layer (21) and adhesive body (20). Intermediate product (10) according to one of the preceding claims, characterized in that the adhesive tape (31) consists of a protective layer (21) and an adhesive body (20). Intermediate product (10) according to one of Claims 3 or 4, characterized in that the adhesive body (20) has a thickness of less than 0.1 mm. Intermediate product (10) according to one of Claims 3 or 4, characterized in that the adhesive body (20) has a thickness of less than 0.07 mm. Intermediate product (10) according to one of Claims 3 to 6, characterized in that the adhesive body (20) has acrylate adhesive. Intermediate product (10) according to one of Claims 3 to 7, characterized in that the adhesive body (20) has foam. Intermediate product (10) according to one of Claims 3 to 8, characterized in that the adhesive body (20) has polyurethane, PVC and/or polyethylene foam. Intermediate product (10) according to one of the preceding claims, characterized in that the adhesive tape (31) is designed as an acrylate foam adhesive tape. Intermediate product (10) according to one of the preceding claims, characterized in that the adhesive tape (31) is designed as an adhesive transfer tape. Surface heat exchanger (26), preferably for air-conditioning buildings, in particular having an intermediate product (10) according to one of the preceding claims, comprising a support plate (11) on one side (12) of which a pipe system (13) for conducting a medium is fixed and on whose On the other side (19) a ready-made adhesive tape (31) is arranged, which fixes the carrier plate (11) in or on a holding cassette (23), characterized in that the adhesive tape (31) is designed without a carrier. Surface heat exchanger (26), in particular for building room air conditioning, comprising a support plate (11) on one side (12) of a pipe system (13) for conducting a medium from at least one heat conducting element (16) is fixed, and a ready-made adhesive tape (30) which fixes the heat conducting element (16) on said side (12) of the carrier plate, characterized in that the adhesive tape (30) is carrier-free. Surface heat exchanger (26), in particular for air conditioning in buildings, comprising a carrier plate (11) on one side (12) of which a pipe system (13) for conducting a medium is fixed by at least one heat-conducting element (16) and on the other side (19) of which a first prefabricated adhesive tape (31) is arranged, which fixes the carrier plate (11) in or on a holding cassette (23), and a second prefabricated adhesive tape (30), which fixes the heat-conducting element (16) on the carrier plate (11), characterized in that that the first and second adhesive tape (31, 30) are each designed as a carrier-free adhesive tape. Surface heat exchanger (40), in particular for the air conditioning of buildings, comprising a carrier plate (11) on one side (12) of which a pipe system (13) for conducting a medium is fixed and on the other side (19) of which a prefabricated adhesive tape (31) is arranged, which defines an outer decorative layer (39) on said other side (19), characterized in that the adhesive tape (31) is unsupported.

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