DE102022131260A1 - Plate heat exchanger, method for its manufacture and system - Google Patents

Abstract

The invention relates to a finned heat exchanger, in particular for air conditioning rooms, comprising a pipe system, in particular a meander pipe, for conducting a medium, wherein the pipe system does not rest on a carrier plate over the majority of its pipe length, but on fins, in particular arranged in parallel, which form a passage of the finned heat exchanger between them, characterized in that the fins are made of sheet metal.

Description

According to a first aspect, the invention relates to a finned heat exchanger. Heat exchangers for air conditioning rooms in the form of surface heat exchangers have been known for a long time.

• Zunächst bestehen zur vorliegenden Erfindung gattungsfremde Plattenwärmetauscher, bei welchen ein Rohrsystem zur Leitung eines Mediums auf einer Trägerplatte, jedenfalls über den Großteil seiner Rohrlänge, aufliegt.

In the current state of the art, there are basically two types:

• First of all, there are plate heat exchangers of a different type to the present invention, in which a pipe system for conducting a medium rests on a carrier plate, at least over the majority of its pipe length.

This carrier plate can be provided by a cassette or a sail, for example, which is why such heat exchangers are also called climate sails. Such a non-generic plate heat exchanger is, for example, in 1 shown, according to which a cassette 2 is attached to a ceiling 1. In the cassette 2 there is a plate 3 (which can alternatively also be provided by the cassette 2 itself), on which pipe sections 4 of a pipe system not shown in more detail rest (which in turn are overlapped or supported by heat-conducting elements 5 and pressed against the plate 3).

Such plate heat exchangers usually enable heat transfer through a high proportion of heat radiation (emitted from the plate/cassette). These plate heat exchangers can also be referred to as radiant ceiling panels.

Generic finned heat exchangers of a second type, on the other hand, have a higher convective component, since they essentially consist of fins which are arranged in parallel and form passages (or shafts) between them of the entire finned heat exchanger, which promote/enable said convection.

Such a state-of-the-art finned heat exchanger is described in 2 from which it can be seen that the straight sections 6 of a pipe system are assigned slats 8.

Such finned heat exchangers generally have a significantly higher performance due to their convective properties, which are based on the said passages/shafts 7, and are therefore also referred to as high-performance elements.

For this purpose, the slats 8 are made or pressed in particular from (aluminium) profiles and held together laterally by a steel frame 9 (in 2 Parts 9a to 9c of the surrounding frame 9 are indicated).

These profiled fins 8, together with the steel frame 9, are not only very heavy (which is why they are also referred to behind closed doors as "radiators"), but they are also not particularly comfortable, as the fins are typically riveted to the frame and then powder-coated. Therefore, even slight scratches on one of the fins lead to a defect in the entire finned heat exchanger, which is difficult to repair.

The object of the invention is therefore to provide a generic plate heat exchanger which is overall more comfortable to handle.

The invention solves the problem according to a first aspect with the features of patent claim 1 and is therefore particularly characterized in that the slats consist of sheet metal.

• So ist der gesamte Lamellenwärmetauscher zunächst vom Gewicht her deutlich leichter und somit deutlich einfacher an einer Gebäudedecke zu befestigen.

In other words, the idea of the invention is to replace the slats made of profiles with sheet metal slats, which offers several advantages in handling:

• The entire finned heat exchanger is therefore significantly lighter in weight and therefore much easier to attach to a building ceiling.

The repair of such a finned heat exchanger is also simplified because the lightness of the fins means that they no longer have to be riveted to a frame or support of the finned heat exchanger. Instead, the fins can be detachably attached to the finned heat exchanger and thus easily replaced (without tools).

If one of the fins has a dent or a notch or something similar, the entire finned heat exchanger does not need to be replaced with a new one. Instead, replacing a single fin is sufficient.

The state-of-the-art profiles are usually not pre-painted and are only finally painted once the entire finned heat exchanger has been assembled (and can then no longer be disassembled).

The invention also increases the variability of the finned heat exchangers: The fins can be For example, they can be adjusted in terms of their colour at the installation site (or replaced by slats of a different colour) or aligned according to the lighting conditions (while the profile slats of the state of the art are fixed to the frame of the finned heat exchanger, sheet metal slats allow a variable alignment due to simplified attachment).

Finally, the transport of a corresponding finned heat exchanger (system) from the place of manufacture to the assembly site is also much easier, since the individual fins can be stacked in an unassembled state, for example together with the pipe system, as individual parts or intermediate products or transported to the assembly site in a space-minimized manner, where they are then assembled to form a finished finned heat exchanger (according to a modular principle).

According to the invention, the slats are made of sheet metal, i.e. they are sheet metal slats.

These are made from sheet metal, especially by punching or nibbled.

Slats are strip-like elements whose axial length exceeds their transverse length by several times. They could also be referred to as strips.

While the very heavy profiles used as slats in the prior art have to be pressed at great expense, the sheet metal slats according to the invention can be easily machined from a raw sheet.

The disadvantage of the state-of-the-art profile slats, in addition to their weight, is that the tools required to manufacture them must have shapes specifically specified for each individual case (for example, specially shaped mandrels if recesses are to be provided in the slats).

According to the invention, however, any shape having variable perforations and/or contours can be machined from raw sheets (in particular those already coil-coated), for example with the aid of a nibbling machine.

According to the invention, thin sheets are used in particular which are, by definition, thinner than 3 mm (which therefore also applies to the lamellae according to the invention). Alternatively, according to a further embodiment, middle sheets with a thickness between 2 mm and 5 mm could also be used (and thus sheet metal lamellae of this thickness could be used).

Heavy plates with a thickness of more than 4.75 mm initially appear to be less suitable, although they should not initially be excluded from the invention.

According to the invention, it can in particular be aluminum sheet (i.e. aluminum lamellae) or a sheet (or lamellae) made of another suitable metal.

A generic finned heat exchanger comprises at least fins and a pipe system. Typically, a finned heat exchanger also has a bracket, which ensures that the fins are held together and that the heat exchanger is fundamentally stable. The bracket can, for example, be a surrounding frame (as is the case, for example, with regard to the state of the art in 2 shown) or end-side retaining elements or retaining strips.

Alternatively, it might also be possible for the finned heat exchanger to dispense with such a mount, for example if the fins are connected to the pipe system, and the structure is suspended directly from the ceiling using attachment points (e.g. hooks or holes) on the fins themselves.

In both cases, the finned heat exchanger preferably has holding means, for example in the form of holding holes, holding recesses, holding counter threads, holding hooks or the like. With the help of these holding means, the finned heat exchanger as a whole can be attached to a ceiling (or alternatively wall) of a room, in particular with the help of suitable aids such as (steel) cables, threaded rods or the like.

According to the generic principle, the lamellae, in particular those arranged in parallel, form a passage or shaft between them, which provides convection effects, which is particularly important in the case of a non-generic prior art such as a plate heat exchanger (for example according to 1 ) is not provided for: While the plate heat exchanger works mainly via (temperature) radiation effects, the increased performance of a finned heat exchanger can be explained by the fact that convection effects are used, which are made possible in particular by the passages mentioned (which can in particular be designed in strip-like fashion).

The passages between the slats can also be described as shafts or air shafts that pass through the (entire) heat exchanger.

In order to enable such passages, no support plate must be provided on which the pipe system rests - directly or indirectly - over the majority of its length (cross plates as part of brackets or similar are, however, not critical).

The pipe system typically has several pipe sections arranged in parallel. It is designed in particular as a meander pipe (but could also have a harp shape or something similar).

The pipe system can be designed in one piece or in several pieces.

Preferably, the pipe system is made of metal, in particular copper.

The finned heat exchanger according to the invention is preferably used for air conditioning rooms/buildings. It is typically mounted on the ceiling of a room in a building. In principle, however, it could also be mounted on the wall of a corresponding room, provided that such an appearance in the wall area does not have a disturbing effect.

Air conditioning preferably involves cooling the room, for which purpose a cooled or at least unheated medium, in particular water, is passed through the pipe system.

Alternatively, a heating effect can of course also be achieved by means of an appropriate finned heat exchanger, in which case a heated medium (especially water) is passed through the pipe system.

As already explained, a generic finned heat exchanger uses convection effects in particular, for which the passage or shaft in the finned heat exchanger is used. The heat exchanger can therefore also be referred to as a convective heat exchanger (in contrast to a radiant heat exchanger or a radiant ceiling according to 1 ).

According to the type, the pipe system does not lie on the carrier plate over the majority of its pipe length, in particular not over more than 50% of its pipe length, preferably over not more than 25% of its pipe length, furthermore not over more than 10% of its pipe length, further preferably not at all.

In the sense of the invention, it is therefore in particular a plate-less finned heat exchanger.

The pipe system rests against the slats in sections. Preferably, the straight sections of the pipe system rest against a slat each.

The (straight) pipe system section can, for example, be attached to the slat in a form-fitting manner or vice versa. In particular, the slat can have a bead in its central area into which the section of the pipe system can be clicked (or glued or otherwise attached) (or over which section the slat can snap). Alternatively, the pipe system section can also be clamped between two opposing slats or its freedom of movement can be limited by them.

During their manufacture, the slats can first be machined in one plane, i.e. in particular the contour of the slat can be machined from a sheet metal blank and/or recesses can be provided in the sheet metal. Such holes in the sheet metal can produce preferential air conduction effects or improved sound properties or similar.

Then, if necessary, part of the lamella is raised out of the sheet metal plane, for example by means of a bending process or similar. This can in particular create wing areas that protrude from the sheet metal plane at a predetermined angle.

A great special feature of the invention is that several sheets can be attached to one another in order to create special structures/laminate composites, such as X-structures or similar. The individual laminations are typically attached to one another in a detachable manner, for example by means of a positive fit or magnet or similar. In this way, the laminations can be separated from one another again (without tools). In principle, however, the invention also covers other forms of attachment, such as gluing, riveting or soldering (to one another) or similar.

However, a form-fitting attachment is preferred, whereby appropriate locking means can be provided on the individual slats during the processing of the raw sheet, such as hooks or counter-holes or similar.

The finished heat exchanger can be held together as a holder, in particular by a frame or end strips or the like, whereby the assembly and in particular the subsequent disassembly of the finned heat exchanger or the attachment of the fins to or removal of the fins from the corresponding holder can also be carried out without tools/detachably, typically in a form-fitting manner (or magnetically).

According to a preferred embodiment of the invention, the slats have perforations or holes. These are material-enclosed passages in the slats or edge recesses or similar. The perforations can be designed to preserve the material, for example in the form of flap or rasp perforations or blind perforations or similar, i.e. perforations in which material is pressed through the sheet plane to create an opening, but not severed.

Alternatively, it can of course also be provided that the holes are designed to reduce the amount of material, i.e. that material is removed from the sheet metal to create the holes. The holes are preferably created directly in the (painted) raw sheet metal, for example in particular before a bending process or a shaping process or similar.

According to a further advantageous embodiment, the slats deviate from a straight line or an I-shape in cross-section. For this purpose, the slats can in particular be reshaped and protruded from the sheet metal plane, at least in sections. In particular, the slats can have wings in the edge area, which are created, for example, by bending the sheet metal.

However, this does not even include any central bead that may be present for inserting a pipe section, but actually the overall shape.

Apart from any bead that may be present, the rest of the slat can preferably be axially or point-symmetrical in cross-section, for example having a U-, V-, S-shape or similar.

Advantageously, the slats are essentially flat in their central cross-sectional area (without prejudice to any bead that may be present for receiving or attaching a section of the pipe system). Otherwise, however, the central cross-sectional area is essentially flat according to this embodiment. This improves the attachment options to other slats (of a composite) that are assigned to the same pipe section (see explanations further below).

However, it can be provided that the slats protrude from the plane formed by the flat cross-sectional area (or the sheet metal plane) in at least one of their edge areas (i.e. in particular away from the flat, central cross-sectional area). In particular, such protruding areas, which are also called wings, can be created by bending the sheet metal material. They can protrude from the sheet metal plane at a desired angle.

According to the most preferred embodiment of the invention, at least two lamellae are assigned to the same pipe section as a “lamella composite”. These can be fixed to one another, in particular with a flat, central cross-sectional area.

The fastening can be done in a removable manner, for example using magnetic or form-fitting connections that can be removed without tools. Alternatively, it can also be done by gluing, riveting or other means.

The pipe section can be located between the two fins or on one side of the two fins.

Several lamella combinations can therefore form generic passages between them.

According to a further embodiment, more than two lamellae can be assigned to the same pipe section (as a composite), for example three or four or five, and these can in particular also be fixed to one another in a flat, central cross-sectional area.

Several slats which are assigned to the same pipe section can, for example, be aligned differently (for example rotated by 180°) or have different (or identical) angles of attack for the wing elements formed laterally by them.

According to a further advantageous embodiment of the invention, at least one lamella can be shaped in such a way that it forms two opposing contact surfaces or boundary surfaces for a pipe section of the pipe system. In this case, a bead can be dispensed with. The pipe section can therefore be arranged between the two opposing contact surfaces and (in contrast to a bead) ensure that there is lateral play when arranging the slats on the pipe system. In this sense, the slat can form a type of box in which the pipe section lies. Such a design is particularly preferred when further slats are assigned to the pipe section, which are then attached, for example, to the said slat, which forms the opposite contact surface.

According to a further aspect of the invention, this relates to a system comprising one of the described finned heat exchangers and a finned supply. The finned supply can have fins which are identical to the fins of the finned heat exchanger or differ in terms of their shape or dimensions and/or their color. The system preferably has reversible connecting means for detachably and/or tool-free attachment of said fins of the finned supply to fins of the finned heat exchanger.

Alternatively, these fins can also be used to replace the existing fins of the finned heat exchanger (for example if they are damaged) via the system's reversible/detachable connecting means. The connecting means can therefore be provided on the fins themselves and/or on a bracket of the system's finned heat exchanger. These can be, for example, positive or magnetic connecting means, for example snap or locking devices or hooks or similar.

In this way, a set of slats can always be kept in stock, for example in case one of the slats is damaged or becomes damaged. The slat can then be easily replaced, especially without tools.

Furthermore, depending on the desired look, for example for different occasions, some or all of the slats can be replaced with slats of a different color or shape or similar. For example, dark slats can be used in the first, lighter season, and lighter slats in another, darker season or similar.

It is also conceivable that, depending on the temperature (or whether the finned heat exchanger is being used for heating or cooling), the fins are replaced with fins of a different shape that are better suited to the desired function.

Finally, the system can also be used to assign a different number of fins to a pipe section, depending on the application. For example, this allows a decision to be made on site or during assembly of the finned heat exchanger as to whether one fin should be assigned to a pipe section or whether several fins should actually be assigned to it, for example two or three. This allows the specific conditions on site to be addressed particularly well (this is not possible with the heavy, finished finned heat exchangers of the state of the art that cannot be disassembled without tools).

Finally, the present invention relates to a method for producing a plate heat exchanger according to claim 10.

At this point, it should be noted that all features and advantages described in connection with the above-described plate heat exchangers (or systems) should of course also be transferable to the method according to the invention (and vice versa), whereby these statements will not be repeated again at this point for reasons of clarity.

Of course, the method according to the invention also includes perforating the sheet metal, in particular in a way that preserves the material, or bending it to produce wings or the like that protrude from the sheet metal plane.

According to a particularly advantageous embodiment of the invention, it is provided that the fins are manufactured and/or provided as intermediate products at a first location, with these intermediate products then being brought to a second, distant assembly location. This location can be several kilometers away from the first location, for example. The assembly location is the location where the finned heat exchanger is to be installed using said intermediate products. The special feature here is that the finned heat exchanger is first assembled at the assembly location and then mounted on a ceiling or wall. In the prior art, the finned heat exchanger is always assembled at the first location, particularly since the entire structure is then painted. The very heavy, space-consuming heat exchanger must then be brought to the assembly location in its finished form in the prior art. This is not the case here.

In particular, the slats can be folded together and sent to the installation site unassembled. The same applies in particular to the Pipe system, which can also be manufactured or provided at the first location and can also be considered an intermediate product, which is then, for example, transported to the assembly location together with the fins. The same can also apply to corresponding brackets or bracket elements for the finned heat exchanger, which can also be referred to as intermediate products in the sense of this idea.

• 1 in einer sehr schematischen seitlichen Schnittansicht, eine gattungsfremde Vorrichtung des Standes der Technik,
• 2 in einer Ansicht gemäß 1, eine gattungsgemäße Vorrichtung des Standes der Technik,
• 3 Zwischenprodukte eines erfindungsgemäßen Lamellenwärmetauschers, in Einzeldarstellung,
• 4 ein zusammengesetzter, erfindungsgemäßer Lamellenwärmetauscher in einer ersten Ausführungsform,
• 5a-5c unterschiedliche Querschnittsansichten von unterschiedlichen Ausführungen der Lamellen-Rohrabschnittkonfiguration des Wärmetauschers gemäß 4,
• 6 ein Abschnitt eines erfindungsgemäßen Lamellenverbundes eines einzelnen Rohrabschnittes in einem Verbund aus drei Lamellen,
• 7 eine sehr schematische Aufsicht auf eine Endplatte einer Halterung eines Lamellenwärmetauschers, welche mehrere Lamellenverbunde gemäß 6 haltern kann,
• 8 eine Aufsicht auf einen vorbereiteten Lamellenrohling,
• 9 eine sehr schematische Ansicht einer Verbindungsart zwischen zwei Lamellen mit einem vorstehenden Hakensystem, und
• 10-35 unterschiedliche Ausgestaltungen von erfindungsgemäßen Lamellen(verbunden).

Further advantages of the invention emerge from the uncited subclaims and from the following description of the embodiments shown in the figures. Therein show:

• 1 in a very schematic side sectional view, a non-generic device of the prior art,
• 2 in a view according to 1 , a generic device of the state of the art,
• 3 Intermediate products of a plate heat exchanger according to the invention, in individual representation,
• 4 a composite finned heat exchanger according to the invention in a first embodiment,
• 5a-5c different cross-sectional views of different designs of the finned tube section configuration of the heat exchanger according to 4 ,
• 6 a section of a lamella composite according to the invention of a single pipe section in a composite of three lamellas,
• 7 a very schematic plan view of an end plate of a bracket of a finned heat exchanger, which has several finned assemblies according to 6 can hold,
• 8th a view of a prepared lamella blank,
• 9 a very schematic view of a type of connection between two slats with a protruding hook system, and
• 10-35 different designs of slats according to the invention (connected).

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 where different embodiments are concerned - identical or comparable parts or elements or areas are designated with identical reference symbols, sometimes with the addition of lower case letters, numbers and/or apostrophes. The same applies to the patent claims following the description of the figures.

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

All disclosed features are essential to the invention in themselves. The disclosure of the application hereby also fully includes the disclosure content of any associated priority documents (copy of the prior application) as well as any cited publications and the described devices of the prior art, also for the purpose of including individual or multiple features of these documents in one or multiple claims of the present application.

The 4 shows, in an oblique, isometric, very schematic view, a first embodiment of a heat exchanger 10 according to the invention.

This essentially consists of the 3 Components or intermediate products shown in a single or exploded view: This is first of all a pipe system 11, which in 3 is shown as a meander pipe (and consists of copper, for example). At the bend (end) areas 12, the pipe system 11 has several parallel, straight pipe sections 16.

3 shows as further intermediate products (five of the actually nine) lamellae 18, which are shown in a very schematic view and are formed in a roughly strip-shaped manner in plan view. While the lamellae 18 in 3 in the supervision do not yet disclose details regarding their respective cross-section, in connection with 4 It is also explained that the slats 18 in particular have bevels and receiving beads for the straight pipe sections 16.

Finally, 3 nor (exemplary two) mounting elements 19a, 19b of a mounting 19.

In the 3 The intermediate products shown can be manufactured in particular at a first location, for example the headquarters or production hall of the manufacturer of the heat exchanger 10, and then preferably packaged (separately, in a space-saving manner).

They can then be transported to a second, remote location, typically the assembly site where they are to be mounted and assembled.

The transport to the second location can be carried out in the usual way, for example by means of trucks or trains or similar.

At the assembly site, typically a building room, the intermediate products can be 3 , then (especially without tools) assembled into a finned heat exchanger 10 as shown in 4 is shown.

For this purpose, the slats 18 (in the exemplary embodiment, nine) can be fixed, in particular without tools, to the pipe system 11, in particular to the straight pipe sections 16. For this purpose, they can, for example, have a contact bead 13, which in 4 can only be guessed at, whereby the straight pipe sections 16 can snap into these beads 13 (alternatively, the pipe sections 16 could also be glued into the beads or something similar).

Due to the parallel arrangement of the straight pipe sections 16, the fins 18 also have a substantially parallel arrangement in the assembled state of the heat exchanger 10.

This leads to 4 that passages or shafts 17 are formed between the fins 18 (which penetrate the heat exchanger 10 essentially along its entire length L).

These shafts 17 enable particularly preferred convection effects, which in the case of generic plate heat exchangers 10 generally lead to greater exchanger performance than in the case of non-generic (plate) heat exchangers according to 1 offer.

With reference to 4 It should be noted that the shafts 17 do not actually penetrate the entire heat exchanger 10, since they are covered by the transversely arranged support elements 19a, 19b, for example in the end regions 14 of the heat exchanger 10. Nevertheless, the shafts 17 extend in the longitudinal direction L over an area of the heat exchanger 10 of more than 50%, in particular more than 80% (so that sufficient convection is ensured).

The holding elements 19a and 19b of the holder 19 can in particular also be made of sheet metal (like the fins 18), which enables a further reduction in the weight of the entire heat exchanger 10. They can be detachably attached to the fins 18 and/or the pipe system 11 (in particular without tools), preferably via a positive connection. For example, they can be screwed to the fins in a threadless, positive-locking manner or fixed magnetically.

They are used in particular to determine a 1 not shown ceiling 1 and are attached to it, for example, via 4 merely indicated fastening elements 15, such as (steel) cables, rods or similar.

4 Finally, it is clear by way of example that the curved areas 12 of the pipe system 11 in the embodiment shown are not covered by the slats 18. In alternative embodiments not shown, however, this is also easily possible.

The slats 18 have, as in 4 As already indicated, next to the central bead 13 there are protruding lateral wings 20.

The 5 illustrate three different, exemplary designs: The 5 each with a slat 18 in cross-section together with a D-shaped tube section 16 in cross-section.

Very exemplary shows 5a for example, that the illustrated slat 18 has two lateral wing elements 20a and 20b which protrude from the sheet plane E of the slat 18, in particular at an angle of attack α.

A central contact area 21, however, is flat and lies in the sheet plane E.

In the embodiment according to 5a it is indicated that the pipe section 16 is attached with its straight contact area to the contact area 21 of the lamella 18 (where 5a for schematic reasons, a certain distance is deliberately left), for example by means of adhesive not shown or (positive-locking or magnetic) connecting elements not shown.

The cross-sectional configuration according to 5b differs from that according to 5a essentially in that the central, flat area 21 of the lamella 18 has a support bead 13 for the pipe section 16.

According to 5c the contact bead 13 is oriented in the opposite direction.

Which of the configurations according to the 5a to 5c in 4 used is left open at this point. Basically, all are suitable.

While in the embodiment according to 4 Since exactly one lamella 18 is assigned to the straight pipe section 16, multi-layer variants are also easily possible.

In this sense, 6 in a very schematic, cut-off view, a section of an embodiment in which a straight pipe section 16 of the pipe meander 11 is assigned not just one lamella, but a lamella composite 22.

Further lamellae assemblies 22 would be formed by forming shafts 17 left and right with respect to the 6 connect, each assigned to a pipe section parallel (to the pipe section 16) (also not shown).

The 6 The lamella assembly 22 shown consists of three "lamella layers", namely an upper lamella 18a, a middle lamella 18b and a lower lamella 18c. All lamellae 18a, 18b, 18c of the lamella assembly 22 have a flat, central contact area 21 with which they rest against one another (for example, the central contact area 21 of the middle lamella 18b is sandwiched between the contact areas 21 of the upper and lower lamellae 18a, 18c.

At least one of the flat contact areas 21 (preferably the contact area 21 of the lower lamella 18c) can have a contact bead for the straight pipe section 16.

While the middle lamella 18b essentially does not protrude from the sheet plane E, both the upper lamella 18a and the lower lamella 18c have wings 20 which protrude from the sheet plane E at angles that are identical in pairs (but different between the lamellas 18a and 18c). In this respect, an almost *-shaped cross-sectional design of the lamella composite 22 is achieved.

The excerpt according to 6 from a heat exchanger 10 according to the invention also illustrates further special features, in particular in comparison to 4 : In the present case, the bracket 19 consists of (threaded) receptacles 19c and 19d. For example, a fastening element 15' in the form of a threaded rod can engage in these, which is fastened with its other end (not shown) to a building ceiling (not shown).

For example, in this sense, each lamella assembly 22 of such a heat exchanger 10 can be assigned its own mounting elements 19c, 19d, so that in the present case no common frame is necessary as a mounting.

According to a further special feature, the slats 18 according to 6 in their outer area, or in the area of the wings 20, air passages or perforations 27. These can, for example, only be material-preserving perforations, during the production of which no material falls off the sheet metal blank, but the material for producing the perforation is simply removed from the wing or sheet metal plane E.

Such perforations 27 serve in particular to conduct air through or over the heat exchanger or to generate turbulence or to improve the air conduction geometry or the like.

• So zeigt 7 eine entsprechende Halteschiene 23 als einen Teil einer Halterung 19. In dieser Halteschiene 23 können beispielsweise die Endbereiche 24 von drei nebeneinander angeordneten Lamellenverbunden 22, wie sie in 6 dargestellt sind, eingeschoben werden.

For the sake of completeness, 6 It should be noted that the laminar assemblies 22 of such a heat exchanger could of course also be attached to the building ceiling in a different way, for example via mounting elements 19a, 19b similar to 4 or by longitudinally L end-side retaining rails, as used for example in 7 are indicated:

• This shows 7 a corresponding holding rail 23 as part of a holder 19. In this holding rail 23, for example, the end regions 24 of three adjacently arranged slatted assemblies 22, as shown in 6 shown.

For this purpose, the holding rail 23 offers three essentially identical holding slots 25 arranged next to one another, into which the ends 24 of the composites 22 can be inserted.

Depending on the design of the pipe system 11 or the slats 18 or the slatted assemblies 22, the retaining rail 23 can of course also provide corresponding receiving slots or receiving channels for the curved areas 12 of the pipe system, which in 7 are indicated by dashed lines for the sake of clarity.

8th then shows in a very schematic plan view a lamella blank 26 which is still unprocessed in terms of its shape, which is designed as a rectangular sheet metal strip and almost unchanged, for example, as a middle lamella 18b in the embodiment according to 6 could be used.

However, this figure mainly serves to illustrate that the slats 18a, 18b, 18c of a slat assembly 22 or several Lamellar composites 22 or also individual lamellae 18 arranged next to one another are usually all initially in the form of blanks 26, which can then be brought into a special (cross-sectional) shape, for example by a bending process.

8th shows that the blank 26 already has holes 27. As shown above, these can be holes that retain the material or, in the alternative embodiment not shown, holes that remove the material, in which the material is simply punched out of the raw sheet and then disposed of or something similar. The holes 27 can of course also have any suitable shape (in the present case they are merely designed as blind holes as an example).

For example, if one were to use a lamella composite 22 according to 6 If you want to produce a product, you would start from 8th , take three corresponding blanks 26, leave one unchanged, use it as the middle lamella 18b, use one by folding two wings as the upper lamella 18a and use another, also by forming two wings by a folding process and by forming a central bead for the tube section 16, as the lower lamella 18c.

In this way, even a rather complex lamella composite 22 can be manufactured very easily.

This also raises the question of how several slats 18 of a slat assembly 22 are attached to one another. This can of course be done in a conventional manner, for example with the help of adhesives. However, since these cannot be easily removed, removable connections between the individual slats of a assembly 22 are preferred: For example, in the contact area 21 according to 6 above the uppermost slat 18a and below the lower slat 18c, corresponding magnets are placed to hold the composite together.

• 9 zeigt dabei, dass in einem Ausschnitt einer Lamelle 18' eine Hakennase 28 aus dem Blech herausgearbeitet ist. Diese kann beispielsweise von derselben Vorrichtung erzeugt werden, wie die Lochungen 26 (beispielsweise mit Hilfe einer Nibbelmaschine). In einer weiteren Lamelle 18" kann dann beispielsweise ein Langloch 29 vorgesehen sein, wobei die beiden Lamellen 18' und 18" formschlüssig, werkzeuglos und lösbar miteinander verbunden werden können, indem sie einfach aufeinander zu bewegt werden, wobei die Nase 28 in das Langloch 29 eintauchen und die Oberseite der Lamelle 18" formschlüssig hintergreifen kann.

Alternatively, detachable or tool-free connections can also be used, such as those used in 9 shown are:

• 9 shows that in a section of a slat 18' a hooked nose 28 is machined out of the sheet metal. This can be produced, for example, by the same device as the holes 26 (for example with the help of a nibbling machine). In another slat 18", for example, an elongated hole 29 can then be provided, whereby the two slats 18' and 18" can be connected to one another in a form-fitting, tool-free and detachable manner by simply moving them towards one another, whereby the nose 28 can dip into the elongated hole 29 and engage behind the top of the slat 18" in a form-fitting manner.

9 thus shows a simple way to attach two slats of a composite to each other.

The two fins 18' and 18" can be separated from each other again at any time, in particular without tools and/or without destroying the heat exchanger 10.

For example, the slat 18' can be replaced with another slat of a different color (but the same shape).

For the sake of completeness, it should be noted that slats can of course also be attached to elements of a holder 19 in this way, for example to strips as shown in 4 shown and designated 19a, 19b.

In both cases, a positive-locking, detachable, and in particular thread-free connection is preferred (although it is possible to create such connections using screw connections; however, screwless or thread-free connections are particularly preferred, as screws usually require tools such as screwdrivers or similar).

The 10 to 14 then show different designs of lamella composites with only one lamella 18, each in a very schematic sectional view, where 10 essentially the embodiment according to 5b with the difference that holes 27 are provided in the area of the wings 20.

11 shows a configuration in which the wings 20 do not protrude but remain in the sheet plane E.

When configuring according to 12 the wings 20 are at a right angle, in the configuration according to 13 also at right angles, but aligned in different directions.

14 then shows a special embodiment in that the lamella 18''' has been bent twice in the same direction and is thus shaped like a horizontal U, with two opposing, parallel contact surfaces or boundary surfaces 30 and 30' for the pipe section 16.

In the transverse direction Q, this design forms a "play-offering" fastening of the pipe and fin. The pipe can be moved in the transverse direction Q in order to simplify the assembly of the fin 18''' or the entire heat exchanger by allowing play (alternatively, instead of an open U-shape, a kind of closed rectangular shape can of course be achieved by further bending).

The 15 to 27 then show exemplary designs of two-layer lamella composites, in which two lamellas are fixed to each other (as already mentioned above, preferably detachably and/or positively).

The two lamellae 18 lie against each other in their flat contact areas and are fixed to each other as described above. In particular, one of the two lamellae 18 (or both) can have a corresponding contact bead for the pipe section 16.

The 15 to 27 illustrate that, for example, one of the lamellae can remain in the sheet plane (see, for example, 22 , 26 or 27 ), the other having protruding wings (for example, protruding at an obtuse, right or acute angle).

Another special feature is the comparison of the 15 and 23 , which shows that by using two identical slats and even an identical orientation to each other, a different appearance of a slat assembly can be achieved: Thus, the contact areas 21 are according to 15 essentially horizontally aligned, those according to 23 essentially vertically. In this way, for example, during the assembly and/or installation of a heat exchanger, depending on the spatial situation, different, in particular optical, effects can be created by aligning the entire assembly 22 (consisting of the two fins 18) differently.

In particular, the holding elements not shown can be provided in such a way that a differently oriented attachment is possible (for example, the end plates can also be suspended in different orientations or similar).

Also, the 15 to 27 It can be seen that the pipe section 16 and/or a bead overlapping it is visible from below, for example in the case of a ceiling arrangement from the room, or not (see for example the difference between 15 and 16 ), depending on the arrangement of pipe section 16 and/or bead in the lamella composite.

Furthermore, the 28 to 32 exemplary comparable arrangements with three-layer lamella composites, i.e. composites consisting of three lamellas, which lie against each other in particular in the contact area 21 (see explanations on 6 ).

Here too, as for example the comparison between the 28 , 29 and 30 shows, the overall alignment or the alignment of the pipe or the bead can be varied.

Finally, the 33 to 35 There are also examples of multi-layer lamella composites, all of which have a lamella similar to 7 in which play is provided between the lamella assembly and the pipe region 16 during assembly by providing opposing, parallel contact surfaces or boundary surfaces 30, 30'. These lamella assemblies each consist of two lamellae (one of which has the aforementioned U-shape).

Claims (11)

Fin heat exchanger (10), in particular for air conditioning rooms, comprising a pipe system (11), in particular a meander pipe, for conducting a medium, wherein the pipe system (11) does not rest on a carrier plate (3) over the majority of its pipe length, but on fins (18), in particular arranged in parallel, which form a passage (17) of the fin heat exchanger between them, characterized in that the fins (18) consist of sheet metal. Plate heat exchanger (10) according to Claim 1 , characterized in that the slats (18) have perforations (27), in particular those which retain the material. Plate heat exchanger (10) according to Claim 1 or 2 , characterized in that the slats (18) deviate from an I-shape in cross-section, but in particular have an axially and/or point-symmetrical cross-section. Fin heat exchanger (10) according to one of the preceding claims, characterized in that the fins (18) are essentially flat in their central cross-sectional area (21), apart from a possibly present contact bead (13) for a section (16) of the pipe system (11). Plate heat exchanger (10) according to Claim 4 , characterized in that the slats (18) protrude at least in one of their edge regions from the plane (E) formed by the flat central cross-sectional region (21), in particular in the manner of a fold and/or at a predetermined angle (α). Fin heat exchanger (10) according to one of the preceding claims, characterized in that at least two, more preferably at least three, fins (18) are assigned to the same pipe section (16), which lie flat on one another in particular in the region of the pipe section (16) and/or form a fin assembly (22). Plate heat exchanger (10) according to Claim 6 , characterized in that said at least two slats (18) are fixed to one another, preferably captively, by means of, in particular, positive-locking or magnetic, releasable connecting means (28, 29), in particular in such a way that they can be separated from one another without tools. Fin heat exchanger (10) according to one of the preceding claims, characterized in that at least one fin (18) is shaped such that it forms two opposing, in particular parallel, contact surfaces or boundary surfaces (30, 30') for a pipe section (16) of the pipe system (11), in particular is U-shaped or box-shaped. System comprising a finned heat exchanger (10) according to one of the preceding claims and a fin supply, wherein the system provides reversible connecting means (28, 29) for tool-free and/or detachable attachment of fins (18) of the fin supply to fins (18) of the finned heat exchanger (10) or for replacing them. Method for producing a finned heat exchanger (10), comprising providing a pipe system (11), in particular a meandering pipe, for conducting a medium, wherein the pipe system (11) is not arranged on a carrier plate (3) over the majority of its pipe length, but on fins (18), in particular arranged in parallel, which form a passage (17) of the finned heat exchanger (10) between them, characterized in that the fins (18) are made of sheet metal, and in particular are bent, preferably using a nibbling machine. Procedure according to Claim 10 , characterized in that the fins (18), and in particular the pipe system (11), are manufactured and/or provided as intermediate products at a first location, said intermediate products then being brought to a second, remote assembly location where the finned heat exchanger (10) is assembled and mounted using said intermediate products.