FLATBINE HEAT EXCHANGER, METHOD FOR ITS MANUFACTURING AND SYSTEM

Description

[0001] According to a first aspect, the invention relates to a finned heat exchanger. Heat exchangers for air conditioning rooms, such as surface heat exchangers, have been well known for some time.

[0002] In the prior art, there are basically two types: Firstly, there are plate heat exchangers unrelated to the present invention, in which a pipe system for conveying a medium rests on a support plate, at least over the majority of its pipe length.

[0003] This support plate can be provided, for example, by a cassette or a sail, which is why such heat exchangers are also called climate sails. One such unconventional plate heat exchanger is used, for example, in Fig. 1 The figure shows a cassette 2 attached to a ceiling 1. A plate 3 is placed inside the cassette 2 (which can alternatively be provided by the cassette 2 itself), on which pipe sections 4 of a pipe system (not shown) rest (which in turn are covered or supported by heat-conducting elements 5 and pressed against the plate 3).

[0004] These types of plate heat exchangers typically enable heat transfer through a high proportion of thermal radiation (emitted by the plate / cassette). These plate heat exchangers can also be referred to as radiant ceiling panels.

[0005] In contrast, finned heat exchangers of a second type exhibit a higher convective component, as they essentially consist of fins that are arranged in parallel and form passages (or shafts) between them of the entire finned heat exchanger, which promote / enable said convection.

[0006] Such a generic finned heat exchanger of the state of the art is in Fig. 2 to recognize from which it can be seen that the straight sections 6 of a pipe system are assigned lamellae 8.

[0007] Such finned heat exchangers, due to their convective properties which are based in the aforementioned passages / shafts 7, generally have a significantly higher performance and are therefore also referred to as high-performance elements.

[0008] For this purpose, the slats 8 are manufactured or pressed, in particular from (aluminum) profiles and held together laterally by a steel frame 9 (in Fig. 2 (Parts 9a to 9c of the surrounding frame 9 are indicated).

[0009] These profiled fins 8, together with the steel frame 9, are not only very heavy (which is why they are also referred to as "radiators" behind closed doors), but they are also not particularly user-friendly, as the fins are typically riveted to the frame and then powder-coated. Therefore, even slight scratches on one of the fins result in a defect in the entire finned heat exchanger, which is difficult to repair.

[0010] The object of the invention is therefore to provide a finned heat exchanger of the generic type which is more convenient to handle overall.

[0011] The invention solves the stated problem according to a first aspect with the features of claim 1 and is therefore characterized in particular by the fact that the lamellae are made of sheet metal, wherein at least two lamellae are assigned to the same pipe section, which lie flat against each other in the area of ​​the pipe section, apart from a possible existing contact groove for the pipe section, but not in their two edge areas.

[0012] In other words, one aspect of the invention is to replace the profiled fins with sheet metal fins, which offers several advantages in terms of handling: Firstly, the entire finned heat exchanger is significantly lighter in weight and therefore much easier to attach to a building ceiling.

[0013] Repairing such a finned heat exchanger is also simplified, as the lightness of the fins means they no longer need to be riveted to a frame or support of the heat exchanger. Instead, the fins can be detachably attached to the heat exchanger and thus easily replaced (without tools).

[0014] If one of the fins has a defect, nick, or similar damage, the entire finned heat exchanger does not need to be replaced. Replacing just one fin is sufficient.

[0015] The profiles used in state-of-the-art technology are usually not pre-painted and are only painted once the entire finned heat exchanger has been assembled (and are then no longer separable).

[0016] Other building space heat exchangers are known from the prior art, for example US 2012 / 080174 A1, which discloses the features of the preamble of claim 1, or US 2007 / 034364 A1, whereby in the first-mentioned prior art document, however, discrete heat exchange elements are provided between individual fins and according to the latter prior art document, only individual fins, i.e., no fin assemblies, are provided.

[0017] The invention also increases the variability of the finned heat exchangers: For example, the fins can be adjusted in terms of their color (or replaced by fins of a different color) or aligned according to the lighting conditions at the installation site (while the profile fins of the prior art are fixed to the frame of the finned heat exchanger, sheet metal fins allow for variable alignment due to simplified installation).

[0018] Finally, the transport of a corresponding finned heat exchanger (system) from the place of manufacture to the place of assembly is also significantly 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 place of assembly in a space-minimizing manner, where they are then assembled into a finished finned heat exchanger (according to a modular principle).

[0019] According to the invention, the lamellae are made of sheet metal; they are therefore sheet metal lamellae.

[0020] These are machined from sheet metal, in particular by stamping or nibbling.

[0021] Lamellae are primarily strip-like elements whose axial longitudinal dimension far exceeds their transverse dimension. They could also be described as slats.

[0022] While the very heavy profiles used as lamellae in the prior art have to be pressed in a complex process, the sheet metal lamellae according to the invention can simply be machined from a raw sheet.

[0023] The disadvantage, besides the weight, of the state-of-the-art profile lamellae is that the tools required for their manufacture must have shapes specifically specified for each individual case (for example, specially shaped mandrels if recesses are to be provided in the lamellae).

[0024] According to the invention, however, any shapes can be worked out from (especially already coated) raw sheets, for example with the help of a nibbling machine, which have variable perforations and / or contours.

[0025] According to the invention, thin sheets are used in particular, which by definition are thinner than 3 mm (which also applies to the lamellae according to the invention). Alternatively, according to a further embodiment, medium 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).

[0026] Initially, heavy plates with a thickness of more than 4.75 mm appear less suitable, although they are not to be excluded from the invention at this time.

[0027] 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.

[0028] A finned heat exchanger of this type comprises at least fins and a pipe system. Typically, a finned heat exchanger also has a support structure that ensures the fins remain together and provides basic stability to the heat exchanger. This support structure can, for example, be a surrounding frame (as is described, for instance, in the prior art in...). Fig. 2 shown) or end-side retaining elements or retaining strips.

[0029] Alternatively, it might also be possible for the finned heat exchanger to do without such a support, for example if the fins are connected to the pipe system, and the structure is suspended directly from the ceiling by means of attachment points (e.g. hooks or holes) on the fins themselves.

[0030] In both cases, the finned heat exchanger preferably has retaining elements, such as retaining holes, recesses, threaded studs, hooks, or similar features. These retaining elements allow the finned heat exchanger to be mounted to the ceiling (or alternatively, the wall) of a room, particularly with the aid of suitable tools such as (steel) cables, threaded rods, or similar materials.

[0031] By design, the fins, especially those arranged in parallel, form a passage or shaft between them, which provides for convection effects, which is particularly noticeable in a prior art device of a plate heat exchanger type (for example, according to Fig. 1 ) is not provided for: While the plate heat exchanger mainly works 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 aforementioned passages (which can be designed in a strip-like manner).

[0032] The openings between the fins can also be described as shafts or air ducts that penetrate the (entire) heat exchanger.

[0033] To enable such passages, no support plate may be provided against which the pipe system rests – directly or indirectly – over most of its length (cross plates as part of supports or similar are, however, unproblematic).

[0034] The pipe system typically has several parallel pipe sections. It is primarily designed as a pipe meander (but could also have a harp shape or similar).

[0035] The pipe system can be designed as a single piece or in multiple pieces.

[0036] Preferably, the pipe system consists of metal, in particular copper.

[0037] The finned heat exchanger according to the invention is used for air conditioning rooms / buildings. It is typically mounted on the ceiling of a room. However, it could also be mounted on the wall of a corresponding room, provided that such an appearance in the wall area is not visually disruptive.

[0038] Air conditioning preferably involves cooling the room, for which a cooled or at least not heated medium, in particular water, is conveyed through the pipe system.

[0039] Alternatively, a heating effect can of course also be achieved by means of a suitable finned heat exchanger, in which case a heated medium (especially water) is guided through the pipe system.

[0040] As already explained, a finned heat exchanger of this type primarily utilizes convection effects, for which the passage or channel in the finned heat exchanger is used. The heat exchanger can therefore also be described as a convective heat exchanger (in contrast to a radiant heat exchanger or a radiant ceiling according to...). Fig. 1 ).

[0041] The pipe system, by design, does not lie against the support plate over the majority of its pipe length, in particular not over more than 50% of its pipe length, preferably not over more than 25% of its pipe length, furthermore not over more than 10% of its pipe length, and preferably not at all.

[0042] In the sense of the invention, it is therefore in particular a finned heat exchanger without support plates.

[0043] The pipe system rests against the lamellae, at least in sections. Preferably, the straight sections of the pipe system each rest against a lamella.

[0044] The (straight) pipe section can, for example, be positively attached to the lamella, or vice versa. In particular, the lamella can have a groove in its central area into which the pipe section can be clicked (or glued or otherwise attached) (or over which the lamella can snap). Alternatively, the pipe section can also be clamped between two opposing lamellae or its freedom of movement can be limited by them.

[0045] During their manufacture, the louvers can first be machined in one plane; that is, in particular, the contour of the louver can be machined from a sheet metal blank and / or recesses can be provided in the sheet metal. Such holes in the sheets can create preferential airflow effects, improved acoustic properties, or similar benefits.

[0046] Subsequently, a portion of the lamella may be raised from the sheet metal plane, for example through a bending process or similar. This can create, in particular, wing sections that protrude from the sheet metal plane at a predetermined angle.

[0047] A key feature of the invention is that multiple sheets can be joined together to create special structures / laminate composites, such as X-structures or similar. The individual laminates are typically joined in a detachable manner, for example, by positive locking, magnetic connection, or similar means. This allows the laminates to be separated again (without tools). However, the invention also encompasses other methods of attachment, such as gluing, riveting, or soldering (to one another), or similar techniques.

[0048] However, a positive-locking attachment is preferred, whereby appropriate locking devices can be provided on the individual lamellae during the processing of the raw sheet metal, such as hooks or counter-perforations or similar.

[0049] The finished heat exchanger can be held together as a support, in particular by a frame or end strips or similar, 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 support can also be carried out without tools / removably, typically by positive locking (or magnetically).

[0050] According to a preferred embodiment of the invention, the slats have perforations or holes. These are therefore material-enclosed passages in the slats, or edge recesses, or similar features. The perforations can, for example, be designed to preserve material, such as flap or rasp perforations, or blind perforations, or similar features, i.e., perforations in which material is pressed through the sheet metal plane to create an opening, but is not removed.

[0051] Alternatively, it is of course possible to design the perforations in a material-reducing manner, i.e., that material is removed from the sheet metal to create the perforations. The perforations are preferably created directly in the (painted) raw sheet metal, for example, particularly before a bending process, a forming process, or similar.

[0052] According to a further advantageous embodiment, the lamellae deviate in cross-section from a straight line or an I-shape. For this purpose, the lamellae can be reshaped and projected out of the plane of the sheet metal, at least section by section. In particular, the lamellae can have wings in the edge region, which are produced, for example, by bending the sheet metal.

[0053] This does not even include a possible central groove for inserting a pipe section, but rather the overall shape.

[0054] Apart from any groove that may be present, the rest of the lamella may preferably be axially or point-symmetrical in cross-section, for example having a U- or V- or S-shape or similar.

[0055] According to the main claim, the lamellae are essentially planar in their central cross-sectional area (notwithstanding any groove that may be present for receiving or attaching a section of the pipe system). Otherwise, the central cross-sectional area is essentially planar according to this embodiment. This improves the attachment possibilities to other lamellae (of a composite) that are assigned to the same pipe section (see further details below).

[0056] However, it can be provided that the louvers project from the plane formed by the flat cross-sectional area (or the sheet metal plane) in at least one of their edge regions (i.e., particularly away from the flat, central cross-sectional area). In particular, such projecting areas, also called wings, can be created by bending the sheet metal. They can project from the sheet metal plane at a desired angle.

[0057] According to the main claim, at least two lamellae are assigned to the same pipe section as a "lamella assembly". These can be fixed to one another, in particular with a flat, central cross-sectional area.

[0058] The fastening can be detachable, for example via tool-free releasable, magnetic or form-fitting connections. Alternatively, gluing, riveting or other methods can be used.

[0059] The pipe section can be located between the two lamellae or on one side of the two lamellae.

[0060] Several lamellae assemblies can therefore form generic passages between each other.

[0061] According to a further embodiment, more than two lamellae can also be assigned to the same pipe section (as a composite), for example three or four or five; these can also be fixed to each other in a flat, central cross-sectional area.

[0062] Several lamellae, which are assigned to the same pipe section, can, for example, be oriented differently (e.g. rotated by 180°) or have different (or the same) angles of attack for wing elements formed laterally by them.

[0063] According to a further advantageous embodiment of the invention, at least one lamella can be shaped to form two opposing contact surfaces or boundary surfaces for a pipe section of the pipe system. In this case, a groove can be omitted. The pipe section can thus be arranged between the two opposing contact surfaces and (unlike a groove) ensure that lateral play is present when the lamellae are arranged on the pipe system. In this sense, the lamella can form a kind of box in which the pipe section is inserted. Such an embodiment is particularly advantageous when the pipe section is further associated with additional lamellae, which are then, for example, attached to the aforementioned lamella that forms the opposing contact surface.

[0064] According to a further aspect of the invention, this relates to a system comprising one of the described finned heat exchangers and a fin supply. The fin supply can have fins that are identical to the fins of the finned heat exchanger or that differ with respect to their shape, dimensions, and / or color. The system preferably includes reversible connecting means for detachably and / or without tools attaching said fins of the fin supply to fins of the finned heat exchanger.

[0065] Alternatively, these fins can also be used to replace the existing fins of the finned heat exchanger (for example, if they are damaged) via reversible / removable fasteners of the system. The fasteners can therefore be located on the fins themselves and / or on a support of the finned heat exchanger of the system. These fasteners can be, for example, positive-locking or magnetic fasteners, such as snap-fit ​​or locking devices, hooks, or similar.

[0066] This way, a supply of slats can always be kept on hand, for example, in case one of the slats is damaged or becomes damaged. The slat can then be easily replaced, especially without tools.

[0067] Furthermore, depending on the desired look, some or all of the slats can be replaced with slats of a different color, shape, or similar for different occasions. For example, dark slats can be used during the first, bright season of the year, and lighter slats during the second, darker season, or something similar.

[0068] It is also conceivable that, depending on the temperature (or whether the finned heat exchanger is being used for heating or cooling), the fins could be replaced with fins of a different shape that are better suited to the desired function.

[0069] Finally, the system also allows for a different number of fins to be assigned to a pipe section, depending on the application. For example, it's possible to decide on-site, during the installation of the finned heat exchanger, whether a pipe section should have one fin or several, such as two or three. This allows for a particularly good response to the specific conditions on-site (something that is not possible with the heavy, prefabricated finned heat exchangers of the current state of the art, which cannot be disassembled without tools).

[0070] Finally, the present invention relates to a method for manufacturing and adapting a finned heat exchanger according to claim 10.

[0071] It should be noted at this point that all features and advantages described in connection with the finned heat exchangers (or systems) described above should of course also be transferable to the method according to the invention (and vice versa), and these statements will not be repeated here for the sake of clarity.

[0072] Naturally, the inventive method also includes perforating the sheet metal, in particular in a material-preserving manner, or bending to produce wings protruding from the sheet metal plane or similar.

[0073] According to a particularly advantageous embodiment of the invention, the fins are manufactured and / or provided as intermediate products at a first location, and these intermediate products are then transported to a second, remote assembly location. This second location can be, for example, several kilometers away from the first location. The assembly location is the place where the finned heat exchanger is to be installed using said intermediate products. The special feature here is that the finned heat exchanger is only assembled at the assembly location and then mounted on a ceiling or wall. In the prior art, the assembly of the finned heat exchanger always takes place at the first location, particularly because a final coating is applied. The very heavy, bulky heat exchanger then has to be transported to the assembly location in its finished form in the prior art. This is eliminated in the present invention.

[0074] In particular, the fins can be folded and shipped to the installation site unassembled. The same applies to the pipe system, which can also be manufactured or provided at the initial location and can also be considered an intermediate product, which is then transported to the installation site together with the fins. The same can also apply to corresponding brackets or mounting elements for the finned heat exchanger, which, in this context, can also be described as intermediate product(s).

[0075] Further advantages of the invention will become apparent from the uncited dependent claims and from the following description of the exemplary embodiments illustrated in the figures. These show: Fig. 1 in a very schematic side sectional view, a non-standard device of the prior art, Fig. 2 in a view according to Fig. 1 , a generic prior art device, Fig. 3 intermediate products of a finned heat exchanger according to the invention, in detail, Fig. 4 a composite finned heat exchanger according to the invention, Figs. 5a-5c different cross-sectional views of different embodiments of the finned tube section configuration of the heat exchanger according to Fig. 4 Fig. 6 shows a section of a finned assembly according to the invention, of a single pipe section in an assembly of three fins; Fig. 7 shows a very schematic top view of an end plate of a support for a finned heat exchanger, which contains several finned assemblies according to Fig. 6 Fig. 8 shows a top view of a prepared lamella blank, Fig. 9 shows a very schematic view of a type of connection between two lamellae with a protruding hook system, and Figs. 10-35 show different embodiments of lamellae according to the invention (connected).

[0076] Exemplary embodiments of the invention are described in the following description of the figures, also with reference to the drawings. For the sake of clarity, identical or comparable parts, elements, or areas are designated with the same reference numerals, sometimes with the addition of lowercase letters, numbers, and / or apostrophes, even where different embodiments are involved. The same applies to the patent claims following the description of the figures.

[0077] Features described only in relation to one embodiment can also be provided in any other embodiment of the invention. Such modified embodiments are included in the invention, even if they are not shown in the drawings.

[0078] All disclosed features are essential to the invention. The disclosure of this application hereby also fully incorporates the disclosure content of any related 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 one or more features of these documents in one or more claims of the present application.

[0079] The Fig. 4 The figure first shows a heat exchanger of the type 10 in an oblique, isometric, very schematic top view.

[0080] This essentially consists of the following: Fig. 3 Components or intermediate products shown in a single or exploded view: This initially involves a pipe system 11, which is in Fig. 3 The pipe system 11 is exemplified as a meandering pipe (and is made of copper, for example). At the bend (end) regions 12, the pipe system 11 has several parallel, straight pipe sections 16.

[0081] Fig. 3 The figure shows further intermediate products (five of the actual nine) lamellae 18, which are depicted in a very schematic view and are approximately strip-shaped in plan view. While the lamellae 18 in Fig. 3 The supervisory authorities have not yet disclosed details regarding their respective cross-sections, in connection with Fig. 4 further explained that the lamellae 18 have in particular bends and receiving grooves for the straight pipe sections 16.

[0082] Finally, it reveals Fig. 3 two (exemplary) mounting elements 19a, 19b of a mounting 19.

[0083] The in Fig. 3 The intermediate products shown can be produced in particular at a first location, for example the headquarters or the production hall of the manufacturer of the heat exchanger 10, and then preferably packaged (separately, in a space-saving manner).

[0084] They can then be transported to a second, remote location, typically the assembly site where they are to be mounted and assembled.

[0085] The transport to the second location can be carried out in the usual way, for example with the help of trucks or trains or similar means.

[0086] At the assembly site, typically a building room, the intermediate products can be assembled according to Fig. 3 , then (especially without tools) assembled into a finned heat exchanger 10, as shown in Fig. 4 is shown.

[0087] For this purpose, the (in the exemplary embodiment nine) lamellae 18 can be fixed to the pipe system 11, particularly without tools, especially to the straight pipe sections 16. For this purpose, they can, for example, have a mounting groove 13 which is Fig. 4 It can at best be guessed that the straight pipe sections 16 can snap into these grooves 13 (alternatively, the pipe sections 16 could also be glued into the grooves or something similar).

[0088] Due to the parallel arrangement of the straight pipe sections 16, the fins 18 also have an essentially parallel arrangement in the assembled state of the heat exchanger 10.

[0089] This leads, as evidenced by the fact that Fig. 4 This results in the formation of passages or shafts 17 between the fins 18 (which essentially pass through the heat exchanger 10 along its entire length L).

[0090] These shafts 17 enable particularly favored convection effects, which in the case of finned heat exchangers 10 of the same type generally lead to higher exchanger performance than in the case of non-plate heat exchangers according to Fig. 1 offer.

[0091] With reference to Fig. 4 It should be noted that the shafts 17 do not actually extend through the entire heat exchanger 10, as they are covered, for example, in the end regions 14 of the heat exchanger 10 by the transversely arranged support elements 19a, 19b. Nevertheless, the shafts 17 extend in the longitudinal direction L over a region of the heat exchanger 10 of more than 50%, in particular more than 80% (so that sufficient convection is ensured).

[0092] The retaining elements 19a and 19b of the support 19 can, in particular (like the fins 18), also be made of sheet metal, which allows for 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-locking connection. For example, they can be positively screwed to the fins without threads or magnetically secured.

[0093] They serve in particular to establish a point in Fig. 1 The ceiling of room 1, not shown further, and are attached to it, for example, via in Fig. 4 only indicated fastening elements 15, such as (steel) cables, rods or similar, are attached.

[0094] Fig. 4 Finally, it is illustrated by way of example that the curved sections 12 of the pipe system 11 are not covered by the lamellae 18 in the illustrated embodiment. In alternative embodiments not shown, this is also readily possible.

[0095] The slats 18 show, as in Fig. 4 As already indicated, next to the central groove 13 projecting lateral wings 20.

[0096] The Figuren 5 Three different, exemplary designs illustrate this: For example, the Figuren 5 Each lamella 18 in cross-section together with a D-shaped pipe section 16 in cross-section.

[0097] This is a very exemplary illustration Fig. 5a for example, that the illustrated lamella 18 has two lateral wing elements 20a and 20b which protrude from the sheet plane E of the lamella 18, in particular at an angle of attack α.

[0098] In contrast, a central plant area 21 is designed flat and lies in the sheet metal plane E.

[0099] In the embodiment according to Fig. 5a It is indicated that the pipe section 16 with its straight mounting area is attached to the mounting area 21 of the lamella 18 (whereby Fig. 5a (for schematic reasons, a certain distance is deliberately left), for example with the help of adhesives not shown or connecting means not shown (form-fit or magnetic).

[0100] The cross-sectional configuration according to Fig. 5b differs from the one according to Fig. 5a essentially in that the central, flat area 21 of the lamella 18 has a groove 13 for the pipe section 16.

[0101] According to Fig. 5c The rib 13 is oriented in reverse.

[0102] Which of the configurations according to the Figuren 5a bis 5c in Fig. 4 The specific type used will be left open at this point. Basically, all are suitable.

[0103] While in the exemplary embodiment according Fig. 4 Since exactly one lamella 18 is assigned to the straight pipe section 16, multi-layer variants are also possible without further ado.

[0104] In this sense, it shows Fig. 6 in a very schematic, truncated view a section of an embodiment in which a straight pipe section 16 of the pipe meander 11 is not merely assigned a lamella, but a lamella assembly 22.

[0105] Further lamellae assemblies 22 would be formed by creating shafts 17 on the left and right with respect to the Fig. 6 connect, each assigned to a pipe section parallel to pipe section 16 (also not shown).

[0106] The in Fig. 6 The illustrated lamella assembly 22 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 abut each other (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).

[0107] In this case, at least one of the flat plant areas 21 (preferably the plant area 21 of the lower lamella 18c) can have a plant groove for the straight pipe section 16.

[0108] 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, as an example, project from the sheet plane E at identical angles in pairs (but different angles between lamellae 18a and 18c). In this way, an almost *-shaped cross-sectional design of the lamella assembly 22 is achieved.

[0109] The excerpt according to Fig. 6 further features of a heat exchanger 10 according to the invention are also illustrated, particularly in comparison to Fig. 4 The bracket 19 in this case consists of (threaded) receptacles 19c and 19d. A fastening element 15' in the form of a threaded rod, for example, can engage in these receptacles, the other end of which is not shown being attached to a building ceiling which is not shown.

[0110] For example, in this sense, each fin assembly 22 of such a heat exchanger can be assigned its own mounting elements 19c, 19d, so that in this case no common frame is necessary as a mounting.

[0111] According to another special feature, the lamellae 18 exhibit according to Fig. 6 In their outer area, or in the area of ​​the wings 20, air passages or perforations 27 are provided. These can be, for example, material-preserving perforations, in the production of which no material falls off the sheet metal blank, but rather the material for the production of the perforation is simply raised from the wing or sheet metal plane E.

[0112] Such perforations 27 serve in particular to direct air through or over the heat exchanger or to generate turbulence or to improve the air guidance geometry or similar purposes.

[0113] For the sake of completeness only, it should be noted that... Fig. 6 It was noted that the finned arrays 22 of such a heat exchanger could of course also be attached to the building ceiling in a different manner, for example via mounting elements 19a, 19b similar to those in Fig. 4 represented or by longitudinal L end-mounted retaining rails, as for example in Fig. 7 are indicated: This shows Fig. 7 a corresponding retaining rail 23 as part of a support 19. In this retaining rail 23, for example, the end regions 24 of three adjacent lamella assemblies 22, as they are in Fig. 6 are shown, to be inserted.

[0114] For this purpose, the retaining rail 23 offers three adjacent, essentially identical retaining slots 25 into which the ends 24 of the assemblies 22 can be inserted.

[0115] Depending on the design of the pipe system 11 or the lamellae 18 or the lamella assemblies 22, the retaining rail 23 can of course also provide corresponding receiving slots or receiving channels for the curved sections 12 of the pipe system, which in Fig. 7 For clarity, they are indicated by dashed lines.

[0116] Fig. 8 The figure then shows a very schematic top view of a lamella blank 26, which is still unprocessed with regard to its shape, is designed as a rectangular sheet metal strip and is almost unchanged, for example, as the middle lamella 18b in the embodiment according to Fig. 6 could be used.

[0117] This figure serves mainly to illustrate that the lamellae 18a, 18b, 18c of a lamella assembly 22 or of several lamella assemblies 22 or even individual lamellae 18 arranged next to each other 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.

[0118] Fig. 8 This shows that the blank 26 already has perforations 27. As shown above, these can be material-preserving perforations, or, in the alternative embodiment not shown, material-removing perforations in which the material is simply punched out of the raw sheet and then disposed of, or something similar. The perforations 27 can, of course, have any suitable shape (here they are merely shown as louvered perforations for illustrative purposes).

[0119] For example, if one were to construct a lamellar composite 22 according to Fig. 6 If one wanted to produce it, one would, starting from Fig. 8 , take three corresponding blanks 26, leave one unchanged, use this as the middle lamella 18b, use one as the upper lamella 18a by bending two wings and use another, also by forming two wings through a bending process and by forming a central groove for the pipe section 16, as the lower lamella 18c.

[0120] In this way, even a rather complex lamellar composite 22 can be produced very easily.

[0121] Furthermore, the question arises as to how several lamellae 18 of a lamella assembly 22 are attached to one another. This can of course be done in the conventional way, for example with the help of adhesives. However, since these are not easily removable, detachable connections between the individual lamellae of an assembly 22 are preferred: For example, in the installation area 21 according to Fig. 6 Magnets are placed above the uppermost lamella 18a and below the lower lamella 18c to hold the assembly together.

[0122] Alternatively, detachable or tool-free connections can of course also be used, such as those found in Fig. 9 The following are shown: Fig. 9 Figure 1 shows that a hook-shaped nose 28 is machined out of the sheet metal in a section of a lamella 18'. This can be produced, for example, by the same device as the perforations 26 (e.g., using a nibbling machine). A further lamella 18" can then, for example, have an elongated hole 29, whereby the two lamellae 18' and 18" can be positively, tool-free, and detachably connected to each other by simply moving them towards each other, whereby the nose 28 can enter the elongated hole 29 and engage the upper surface of the lamella 18" in a positive-locking manner.

[0123] Fig. 9 This shows a simple way to fix two lamellae of a composite together.

[0124] The two fins 18' and 18" can be separated from each other at any time, in particular without tools and / or without destroying the heat exchanger 10.

[0125] For example, this allows the 18' lamella to be replaced with another lamella of a different color (but the same shape).

[0126] For the sake of completeness, it should be noted that in this way louvers can of course also be attached to elements of a bracket 19, for example to strips such as those found in Fig. 4 shown and labelled 19a, 19b.

[0127] In both cases, a positive-locking, detachable, and in particular threadless connection is preferred (although it is conceivable to achieve such connections with screw connections; however, screwless or threadless connections are particularly preferred, since tools such as screwdrivers or similar are usually required for screws).

[0128] The Figuren 10 bis 14 then show different designs of lamella composites with only one lamella 18, each in a very schematic sectional view, whereby Fig. 10 essentially according to the exemplary embodiment Fig. 5b This corresponds, with the difference that perforations 27 are provided in the area of ​​the wings 20.

[0129] Fig. 11 shows a configuration in which the wings 20 do not protrude, but remain in the sheet metal plane E.

[0130] When configuring according to Fig. 12 The wings 20 protrude at a right angle, in the configuration according to Fig. 13 also at right angles, but aligned in different directions.

[0131] Fig. 14 This shows a particular embodiment in that the lamella 18‴ has been bent twice in the same direction and is thus shaped like a lying U, with two opposing, parallel contact surfaces or boundary surfaces 30 and 30' for the pipe section 16.

[0132] In the transverse direction Q, this embodiment forms a "play-providing" fastening of the tube and fin. The tube can be moved in the transverse direction Q to simplify the assembly of the fin 18‴ or the entire heat exchanger by means of play (alternatively, instead of an open U-shape, a kind of closed rectangular shape can of course be achieved by further bending).

[0133] The Figuren 15 bis 27 They then show exemplary designs of two-layer lamella composites, in which two lamellae are fixed to each other (as mentioned above, preferably detachable and / or form-fitting).

[0134] The two lamellae 18 lie against each other in their flat mounting areas and are fixed to each other as described above. In particular, one of the two lamellae 18 (or both) can have a corresponding mounting groove for the pipe section 16.

[0135] The Figuren 15 bis 27 This illustrates that, for example, one of the lamellae can remain in the plane of the sheet metal (see, for example, Fig. 22, 26 oder 27 ), the other having protruding wings (for example, protruding at an obtuse, right or acute angle).

[0136] Another special feature is revealed by the comparison of the Fig. 15 and 23 , which illustrates that by using two identical lamellae and even an identical orientation to each other, a different appearance of a lamella assembly can be achieved: Thus, the system areas 21 according to Fig. 15 essentially horizontally aligned, those according to Fig. 23 essentially vertical. In this way, different effects, especially visual ones, can be created during the assembly and / or installation of a heat exchanger, depending on the room situation, by orienting the entire assembly 22 (consisting of the two fins 18) differently.

[0137] In this context, the retaining elements not shown can be designed in such a way as to allow for different orientations of attachment (for example, the end plates can also be hung in different orientations or similar).

[0138] Also, the Figuren 15 bis 27 It can be inferred whether pipe section 16 and / or a groove crossing it is visible from below, i.e., for example, from inside the room in the case of a ceiling installation, or not (cf., for example, the difference between Figuren 15 and 16), depending on the arrangement of pipe section 16 and / or groove in the lamellar assembly.

[0139] Furthermore, the Figuren 28 bis 32 Exemplary comparable arrangements with three-layer lamella composites, i.e. composites consisting of three lamellae, which in particular lie next to each other in the installation area 21 (see explanations regarding Fig. 6 ).

[0140] Here too, as for example the comparison between the Figuren 28, 29 und 30 This shows that the overall orientation or the orientation of the pipe or the bead can be varied.

[0141] In conclusion, the Figuren 33 bis 35 further examples of multi-layered lamella composites, all of which resemble a lamella Fig. 7exhibiting a design in which, by providing opposing, parallel contact surfaces or boundary surfaces, 30, 30' clearance is offered between the lamellar assembly and the pipe section 16 during assembly. These lamellar assemblies each consist of two lamellae (one of which has the aforementioned U-shape).

Claims

1. Lamellar heat exchanger (10) for the air conditioning of rooms of buildings, comprising a pipe system (11), in particular a pipe meander, for conducting a medium, wherein the pipe system (11) does not rest against a support plate (3) over the majority of its pipe length, but against lamellae (18), in particular arranged in parallel, which form a passage (17) of the lamellar heat exchanger between them, and wherein the lamellae (18) consist of sheet metal, characterised in that at least two lamellae (18) are associated with the same pipe section (16), which lamellae lie flush on top of each other in the area of the pipe section (16), apart from any plant bead (13) for the pipe section (16) if present, but not in their two edge areas.

2. Lamellar heat exchanger (10) according to claim 1, characterised in that the lamellae (18) have perforations (27), in particular material preserving perforations.

3. Lamellar heat exchanger (10) according to claim 1 or 2, characterised in that the cross section of the lamellae (18) deviates from an I-shape, but in particular have an axially and / or point symmetric cross section.

4. Lamellar heat exchanger (10) according to one of the preceding claims, characterised in that the lamellae (18) are essentially flush in their central cross-sectional area (21), apart from, if present, the plant bead (13), for a section (16) of the pipe system (11).

5. Lamellar heat exchanger (10) according to claim 4, characterised in that the lamellae (18) project at least in one of their edge areas from the plane (E) formed by the flush central cross-sectional area (21), in particular in the manner of a bend and / or at a predetermined angle (α).

6. Lamellar heat exchanger (10) according to one of the preceding claims, characterised in that at least three lamellae (18) are assigned to the same pipe section (16), which in particular form a lamellae composite (22).

7. Lamellar heat exchanger (10) according to one of the preceding claims, characterised in that said at least two lamellae (18) are fixed to one another, preferably captively, by, in particular form-fitting or magnetic, releasable connecting means (28, 29), in particular in such a way that they can be separated from one another without tools.

8. Lamellar heat exchanger (10) according to the preamble of claim 1, characterised in that at least one lamella (18) is shaped in such a way 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.

9. System comprising a lamellar heat exchanger (10) according to one of the preceding claims and a lamella supply, wherein the system provides reversible connecting means (28, 29) for attaching lamellae (18) of the lamella supply to lamellae (18) of the lamellar heat exchanger (10) without tools and / or detachably, or for replacing them.

10. Method for the production and adaptation of a lamellar heat exchanger (10) for the air conditioning of rooms of buildings according to one of claims 1 to 8, comprising providing the pipe system (11), in particular pipe meander, for conducting a medium, wherein the pipe system (11) is not arranged on a support plate (3) over the majority of its pipe length, but on, in particular parallel arranged, lamellae (18), which form between them a passage (17) of the lamellar heat exchanger (10), and wherein the lamellae (18) are produced from sheet metal, and in particular are beveled, preferably using a nibbling machine, characterised in that some or all of the lamellae (18) are exchanged for lamellae of a different shape or colour with the aid of reversible connecting means (28, 29).