EP2832464B1 - Lamella element and method for producing a lamella element - Google Patents

Lamella element and method for producing a lamella element Download PDF

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Publication number
EP2832464B1
EP2832464B1 EP14179522.9A EP14179522A EP2832464B1 EP 2832464 B1 EP2832464 B1 EP 2832464B1 EP 14179522 A EP14179522 A EP 14179522A EP 2832464 B1 EP2832464 B1 EP 2832464B1
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EP
European Patent Office
Prior art keywords
lamella
pressing force
lamellar element
lamella element
lamellar
Prior art date
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Active
Application number
EP14179522.9A
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German (de)
French (fr)
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EP2832464A1 (en
Inventor
Clemens David
Rupert Jäger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DBK David and Baader GmbH
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DBK David and Baader GmbH
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Publication of EP2832464A1 publication Critical patent/EP2832464A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00Making other particular articles
    • B21D53/02Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/022Making the fins
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D13/00Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
    • B21D13/08Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form by combined methods
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00Air heaters
    • F24H3/02Air heaters with forced circulation
    • F24H3/04Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0429For vehicles
    • F24H3/0435Structures comprising heat spreading elements in the form of fins
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00Tubular elements; Assemblies of tubular elements
    • F28F1/10Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/126Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element consisting of zig-zag shaped fins

Definitions

  • the invention is based on a lamellar element according to the preamble of claim 1 and a method for producing a lamellar element according to the preamble of claim 7.
  • Such a lamella element and such a method are in the JP-A-H09280754 disclosed.
  • heating devices are used to heat an interior and an engine of the motor vehicle.
  • heating devices are also suitable for other purposes in a wide range of applications, for example in the field of domestic installations (air conditioning), industrial plants and the like.
  • Such heating devices in particular those with PTC heating elements (positive temperature coefficient, positive temperature coefficient, PTC thermistor), usually have lamellar elements that are used to dissipate heat. The heat dissipation of the lamellar elements is supported by an air current flowing around the lamellar elements, which is generated by a fan.
  • a heating device with lamellar elements or corrugated fin elements is known.
  • a respective lamella element has a multiplicity of lamellas which are connected to one another via lamella arches or connecting sections. Fin arches of one side of the fin element are attached to a radiator panel.
  • the lamellar element is held in its longitudinal direction via the radiator sheet.
  • the lamellar element is fixed in position with the radiator sheet, both in its longitudinal and in its transverse direction. As a result, it can be mounted in the heating device comparatively easily.
  • a disadvantage of this solution is that an additional component, namely the radiator sheet, is required to fix the position of the lamellar element.
  • the invention is based on the object of creating a lamellar element that can be produced easily and inexpensively, has a simple design in terms of device technology and is easy to assemble.
  • a further object of the invention is to provide a simple and inexpensive method for producing such a lamellar element.
  • the object is achieved with regard to the lamella element according to the features of claim 1 and with regard to the method according to the features of claim 7 .
  • a lamellar element or a corrugated rib is designed as a meandering curved strip. Seen in the strip direction, the slat element alternately has a connecting section for connecting two slats and one slat.
  • the lamellar element is preferably subjected to a pressing force for plastic deformation of at least the force-loaded connecting sections via a plurality of connecting sections or via all connecting sections or essentially all connecting sections.
  • lamellae of at least a subset of the lamellae or all lamellae are provided with one or more beads.
  • the application of the pressing force results in the rigidity of the lamellar element being significantly increased. It is thus possible, for example, to dispense with the radiator sheet provided in the prior art explained at the beginning or with soldering of the connecting sections in order to form the lamellar element easy to assemble. Such an increase in rigidity thus leads to better handling of the lamellar element and accordingly to easier assembly.
  • the lamellar element is prevented from "jumping open”. Introducing beads into slats also leads to a significant increase in the rigidity of the slat element. If a lamellar element is subjected to a pressing force during manufacture and if it also has beads, this combination leads to an exceptionally high level of rigidity.
  • a partial area is plastically deformed in each case in the connection sections subjected to a pressing force by the application of the pressing force, with the result that the remaining area can essentially remain in its original shape.
  • the entire connecting section does not have to be deformed in order to achieve sufficiently high rigidity of the lamellar element. Since the entire connection section is not deformed, manufacture of the lamellar element is also simplified. Furthermore, it has been shown that such a configuration is particularly well suited for a continuous production process of the lamellar element, in which this is simply guided through a tool with a tapering opening, which is designed such that only the partial areas are deformed. The pressing forces that occur as a result are comparatively low.
  • the partial area of a connecting section is preferably a free edge area.
  • both edge regions of a respective connecting section subjected to a pressing force are plastically deformed, which further increases rigidity and enables symmetrical stiffening of the lamellar element.
  • a respective connection section to which a pressing force is applied can be configured in an arc shape between its edge regions, viewed in cross section.
  • the connecting section can thus, for example, retain its original shape in its middle area, which means that a maximum height of the lamellar element is a height of known heights that are not subjected to a pressing force Corresponds to lamellar elements.
  • the dimensions from the prior art can essentially be retained, with the result that a heating device which uses these lamellar elements does not have to be redesigned.
  • a respective formed edge area is simply flattened, with which the associated tool can be easily configured.
  • All connecting sections are preferably plastically deformed.
  • the application of the pressing force to the lamellar element during production can result in a planar surface in the region of its connecting sections, with which unevenness can be compensated for.
  • This is extremely advantageous for attaching PTC heating elements, for example, since a contact or contact surface between the PTC heating elements and the lamellar element is essentially flat. This also creates high electrical conductivity and high thermal conductivity between the PTC elements and the lamellar element.
  • Two functional sides of the lamella element which are spaced apart from one another and between which the lamellas are arranged are preferably formed with the connecting sections, in particular in all of the embodiments.
  • the pressing force is applied to it from both functional sides simultaneously from the outside.
  • the lamellar element can be subjected to a further force during production in the longitudinal direction, in particular a holding force for holding the lamellar element or a pressing force for upsetting the lamellar element.
  • This additional force is then directed approximately in a direction running parallel to the functional sides. It has been shown that this measure can further increase the rigidity of the lamellar element and/or the lamellar element can be held securely during production.
  • a distance between the Connecting portions of the function pages are reduced, so that the lamellar element has a compact design.
  • At least the connecting sections are plastically deformed by the application of the pressing force applied via the connecting sections.
  • connection sections are deformed by the application of the pressing force from a curved shape into a shape that is flat at least in sections.
  • the crests connecting the slats are leveled.
  • Compression of the connecting sections can be between 0.2 and 0.5 mm, for example, as a result of the pressurizing force being applied via the connecting sections.
  • a radius can be provided in the transition area between a respective connecting section and the lamella connected to it.
  • a receiving space is formed between adjacent connecting sections, in which adhesive can be displaced when gluing, for example, PTC heating elements to the lamellar element. This enables better current introduction and optimizes production.
  • a lamella together with its two connecting sections, preferably has an approximately Z-shape as seen in a flow direction of the lamella element.
  • the slats connected to one another via a connecting section are preferably brought closer together with their end sections remote from the connecting section. Additionally or alternatively, the end sections can rest against one another. By approaching each other or abutting end portions of the slats can be introduced beads of each adjacent slats dive into each other in sections, whereby the slats then overlap each other via their beads. This leads to additional stability of the lamellar element.
  • At least the lamellae of the subset or all lamellae have three beads. These can be configured approximately the same. Furthermore, they can extend over a large part of the lamella.
  • a first bead is introduced from their one side surface and a second bead or two second beads are introduced from their other side surface.
  • a respective bead preferably extends somewhat parallel to a longitudinal edge of its lamella. This configuration and arrangement of the beads has proven to be extremely advantageous in order to increase the rigidity of the lamellar element.
  • the beads can each be elongate in a simple manner in terms of device technology and, for example, be spaced somewhat from the connecting sections. If there are a plurality of beads in a lamella, these are then approximately at a parallel distance from one another. A distance between the beads is preferably essentially the same. It is conceivable that with three beads, the middle bead shares its longitudinal flanks with the side beads.
  • two lateral beads are introduced from one side surface and a central bead is introduced into this from the other side surface.
  • the beads are preferably designed in such a way that a flow cross section between two adjacent lamellae, viewed in the direction of flow, remains essentially the same. This means that in a plane which extends through the slats approximately parallel to the functional sides of the slat element, there is a distance between any two adjacent slats is substantially the same. This avoids a pressure loss when a fluid flows through the lamellar element.
  • the beads are preferably placed in approximately the same position for each lamella. Bulges from beads in the same position then have the same orientation.
  • the flow cross-section in the direction of flow of the fluid between two adjacent lamellas thus remains essentially the same due to the beads of the lamellar element being configured and arranged essentially the same way.
  • a lamellar element can be produced with a few simple method steps, which has a high degree of rigidity and therefore, in contrast to the prior art, does not require any additional radiator sheet metal or soldering of connecting sections.
  • the connecting sections of a respective side of the lamellar element are successively subjected to the pressing force in the direction of the lamellae, which leads to continuous production would lead. It is also conceivable that in each case at least two opposing connecting sections can be acted upon by the pressing force at about the same time. This continuous production takes place, for example, via two rollers between which the lamellar element is passed after it has been formed into a corrugated rib. Or a tool can be provided with an opening that tapers in the direction of passage.
  • the band is preferably embossed before it is laid to form the corrugated rib.
  • the strip is deformed in such a way that the connecting sections are curved at least in sections before the lamellar element is subjected to the pressing force. Viewed in the direction of the strip, the connecting sections thus each extend approximately along a curve.
  • the pressing force is then applied via the connecting sections, preferably in such a way that the curved connecting sections are flattened and the lamellar element is thus leveled.
  • the force acting in the longitudinal direction on the lamellar element is a holding force which is applied before and/or approximately at the same time as the pressing force is applied to the lamellar element.
  • the lamellar element can be longitudinally fixed by the holding force and then pressed over the connecting sections or the lamellar element can be pressed together in the longitudinal direction and held (fixed) in its defined length and then pressed over the connecting sections.
  • a tool for producing the lamella element is then suitably fixed in the end position before the pressing force is applied via the connecting sections.
  • the lamellar element can be transversely fixed before and/or at the same time as the pressing force is applied from both sides.
  • the transverse fixation takes place in the transverse direction, ie approximately in the flow direction of the lamellar element or in the direction of the width defined by the lamellar element.
  • the transverse fixation prevents the compressed lamellar element from “jumping out laterally” from the production tool.
  • a heating element in particular a PTC heating element, can be arranged at least on one functional side of the lamellar element.
  • the heating element is preferably glued or clamped to the lamellar element.
  • a tool for producing a lamellar element is provided according to one of the preceding aspects, the tool not relating to the subject matter of the present invention but serving as an example solely to explain it.
  • the tool preferably has a one-piece or multi-piece tool body with an opening through which the lamellar element can be passed for forming, wherein an opening cross section of the opening is designed such that the lamellar element is subjected to a pressing force when it is carried out.
  • the tool allows the sides of the lamellar element to be continuously depressed and stiffened.
  • the tool can be designed, for example, as a kind of four-sided draw key.
  • rollers for shaping the lamellar element are provided.
  • the tool is preferably arranged at the end of a continuous production of the lamellar element.
  • the opening has one or more edges--extending, for example, in one plane--for reshaping the partial areas of the lamellar element.
  • the opening for each partial area of the lamellar element to be formed can have a wedge surface extending approximately in the longitudinal direction for the constant application of a pressing force.
  • the opening preferably extends along a longitudinal direction, with a cross section of the opening seen in the longitudinal direction becoming smaller or tapering (in particular through the wedge surfaces).
  • the opening is preferably designed in such a way that the lamellar element passed through the through-hole rests (preferably only) with its partial areas to be deformed against the one wedge surface or the plurality of wedge surfaces of the opening during the application of the pressing force.
  • the tool has wedge surfaces or edges for the entire reshaping of the connecting section according to the further embodiment of the lamellar element.
  • Two, three or four wedge surfaces or edges are preferably provided in order to correspondingly reshape two, three or all of the corner regions of the lamellar element.
  • the lamellar element 1 is configured in a meandering shape. It is made from a laid strip, with a lamella 2 and a connecting section 4 being formed alternately in the direction of the strip.
  • the connecting sections 4 of the lamellar element 1 then form a first and second functional side 6 and 8 of the lamellar element 1.
  • the lamellar element 1 is designed such that the respective end sections 10a, 10b of two adjacent lamellae 2a, 2b, which are spaced apart from the connecting section 4 of these lamellae 2a, 2b, abut one another or are at least approximated. Adjacent slats 2a, 2b thus approach one another, starting from their connecting section 4.
  • the lamellar element 1 is subjected to a flat pressing force from both functional sides 6 and 8 via its connecting sections 4 , which acts approximately normal to the functional sides 6 and 8 .
  • the connecting sections 4 are plastically deformed and each have a flat section 14 having an approximately planar outer surface 12.
  • the outer surfaces 12 of the connecting sections 4 on a respective functional side 6 or 8 then each span a plane.
  • the flat sections 14 each extend over the entire width of the lamellar element 1 viewed in a flow direction 16 .
  • a width of the flat sections 14 seen transversely to the direction of flow 16 is in essentially constant.
  • a respective slat 2 is connected to its respective connecting section 4 via a curved section 18a or 18b.
  • a respective curved section 18a and 18b extends from the flat section 14 to the respective end section 10b or 10a of the slats 2a or 2b. Due to the curved sections 18a and 18b, starting from the flat section 14 towards the lamellae 2, a receiving space 20 is formed between two adjacent connecting sections 4a and 4b. If, for example, a PTC heating element is attached to the functional side 6 and/or 8 via an adhesive, this adhesive can be displaced into the receiving spaces 20 between the connecting sections 4 .
  • each lamella 2 three beads 22, 24 and 26 are introduced. These are each elongate and extend at a parallel distance from the longitudinal edge 28 of the lamella 2 in which they are introduced.
  • the beads 22 to 26 are spaced apart from one another. Alternatively, it is conceivable that adjacent beads 22 to 26 of a lamella 2 share their longitudinal flanks 30a to 30d. In the present exemplary embodiment, the beads 22 to 26 are evenly spaced apart from one another as viewed in the direction of flow 16 .
  • the beads 22 and 26 are introduced in an outer area of the lamella 2 and the bead 24 is formed between these beads 22 and 26 in the middle of the lamella 2 .
  • a distance between the beads, viewed in the flow direction 16, corresponds approximately to the distance between the outer beads 22 and 26 and their adjacent longitudinal edge 28 or 32.
  • the beads 22 to 26 preferably end in front of the connecting section 4 of their lamella 2. However, it is conceivable that the beads 22 to 26 extend into one or both connecting sections 4 of their lamella 2. Furthermore, it is conceivable that they also extend into one or both flat sections 14 of the connecting section 4 of their lamella 2 .
  • the two outer beads 22 and 26 of a respective lamella 2 are introduced from a first side face 34 and the middle bead 24 from the other side face 36 .
  • the beads 22 and 26 thus have a bulge which is oriented approximately in the opposite direction to the bulge of the central bead 24 .
  • Each bead 24 has a bead base 38.
  • Longitudinal flanks 30b and 30c extend from this in an approximately V-shape relative to one another, with their spacing increasing as the distance from bead base 38 increases.
  • the bead 24 has two transverse flanks 40a and 40b, which also extend in a V-shape towards one another, starting from the bead base 38, with their spacing increasing as the distance from the bead base 38 increases.
  • the adjacent longitudinal and transverse flanks 30b, 30c, 40a, 40b are each connected to one another via a curved flank 42.
  • the beads 22 and 26 are thus each designed approximately in the shape of a bowl.
  • the beads 22 and 26 of a respective lamella 2 are configured essentially the same and are also positioned in the same way on the respective lamellas 2 .
  • the beads 22 to 26 of one lamella 2a can partially dip into the beads 22 to 26 of the other lamella 2b.
  • a relative displacement of the lamellae 2a and 2b, in particular in the direction of flow 16, is thus made more difficult, as a result of which the rigidity of the lamellar element 1 is increased.
  • FIG 3 shows the lamellar element 1 before it is subjected to a pressing force via its connecting sections 4 .
  • the connecting sections 4 are each configured in a curved manner. Viewed in cross-section, they each extend approximately partially around a circle.
  • the beads 22 to 26 for each lamella 2 are introduced into a band which consists in particular of metal, preferably aluminum or an aluminum alloy. This is done, for example, by an embossing process. Then the band is bent, so that it is then about the configuration according to the Figures 3 and 4 having.
  • the lamellar element 1 has an extremely high rigidity in comparison to a lamellar element without beads. The rigidity can be further increased if the lamella element 1 from its functional pages 6 and 8, see figure 4 , flat with a Pressing force is applied, whereby the connecting portions are plastically deformed and according to the shape figure 2 reach.
  • Pressing forces 44 and 46 are directed approximately transversely to the direction of flow 16 and point toward one another.
  • the pressing forces 44 and 46 are applied to the lamellar element, it is stretched in the longitudinal direction via its end faces 48 and 50 according to FIG figure 3 applied in order to avoid drifting apart of the lamellae 2 when the pressing forces 44 and 46 are applied.
  • the lamellar element 1 can also be compressed via the end faces 48 and 50, ie plastically deformed in the longitudinal direction.
  • a lamellar element arrangement 52 is shown. This has at least one lamella element 1 which is firmly connected to heating elements 54 to 58 .
  • the lamellar element arrangement 52 has a further lamellar element 1a.
  • the PTC heating elements 54 to 58 are then over their large areas with a respective functional page 6, 8, see figure 1 , The lamella element 1 or 1a connected.
  • adhesive is applied to the large areas of the PTC heating elements and/or to the functional sides 6, 8 of the lamellar elements 1, 1a to be connected to them and then the parts 54 to 58, 1 and 1a to be connected are arranged relative to one another. Excess adhesive can then in the receiving spaces 20, of which in the figure 5 by way of example, two are provided with a reference number.
  • a sectional plane of the breakout extends approximately parallel to the functional side 6 or 8 of the lamellar element 1 through the middle thereof. It can be seen here that in a plane that extends parallel to the functional sides 6 and 8 and intersects the lamellae 2, a distance between two adjacent lamellae 2a, 2b remains essentially the same, which in turn means that the flow cross-section between two adjacent lamellae 2a and 2b is essentially remains the same. This takes place in that the beads 22 to 26 of a respective lamella are configured essentially the same and also essentially are positioned the same with respect to their lamella. This configuration is advantageous for achieving a low differential pressure during operation (with flow).
  • a tool 60 for applying the pressing forces to the lamellar element 1 is shown as an example.
  • the tool 60 has two tool parts 62 and 64 that are L-shaped when viewed in cross section.
  • Each tool part 62 and 64 has a first leg 66 and a second leg 68.
  • the lamellar element 1 then lies with its one functional side 6 on the leg 66 of the a tool part 62 and with its other functional side 8 on the leg 66 of the other tool part 64.
  • a respective leg 66 has an approximately flat contact surface 70 which is designed in such a way that the lamellar element can rest against these contact surfaces 70 essentially with its entire functional side 6 or 8 .
  • the lamellar element 1 rests with its one end face 48 on the leg 68 of one tool part 62 and with its other end face 50 on the leg 68 of the other tool part 64 .
  • the legs 68 each have a contact surface 72 extending approximately perpendicularly to the contact surface 70 of their respective tool part 62 or 64.
  • the contact surfaces 72 are designed in such a way that the end faces 48 and 50 of the lamellar element 1 can bear against them over a large area.
  • the tool parts 62 and 64 are spaced apart from one another in such a way that they do not touch during the forming process of the lamellar element 1 . In order to shape the lamellar element 1, the tool parts 62 and 64 are then moved towards one another.
  • the legs 66 of the tool parts 62 and 64 are displaced relative to one another such that a distance between them is reduced.
  • the legs 68 are displaced relative to one another in such a way that a distance between them is reduced in order to upset the lamellar element 1 .
  • the legs 68 maintain a constant spacing, as a result of which they only support the lamellar element 1 during the forming process via the legs 66 . In the latter case, it is conceivable that the lamellar element 1 is compressed by the legs 66 before it is supported.
  • the tool 60 or the tool parts 62 and 64 can have corresponding contact surfaces.
  • the lamellar element 1 has connecting sections 4 which are only partially plastically deformed. This simplifies production of the lamellar element 1 .
  • the lamellar element 1 has beads 22, 24 and 26.
  • the deformed partial areas of the lamella element are the edge areas 74, 76 of a respective connecting section 4, which are exposed.
  • the edge areas 74, 76 are pressed flat or essentially flat.
  • the two diametrical edge regions 74, 76 of a respective connecting section 4 are arranged in an approximately V-shape with respect to one another.
  • the remaining respective area of the connecting portion 4 which is not flattened has an arcuate shape in cross section.
  • a tool 78 for producing the lamellar element 1 with the deformed edge regions 74, 76 is shown.
  • the tool 78 has a tool body 80 with two tool shells 82 and 84 which together define an octagonal opening 86 .
  • the opening 86 has four edges 88 to 94, via which the lamellar element 1 is plastically deformed.
  • the symmetrically arranged edges 88 to 94 are each in a corner area of the opening 86. If the lamellar element 1 is guided through the opening 86, the edges of the lamellar element 1 and thus the edge areas 74 and 76 of the connecting sections 4 become plastic through the edges 88 to 94 deformed.
  • the other areas of the lamellar element 1 are spaced apart from a wall of the opening 86 when passing through, with the result that free spaces 96 to 102 are formed between the lamellar element 1 and the wall.
  • the opening 86 has wedge surfaces which, as seen in the longitudinal direction - according to figure 10 perpendicular to the plane of the drawing - extend.
  • the edge regions 74 and 76 would thus be continuously deformed when the lamellar element 1 is guided through the opening 86 .
  • the wedge surfaces lead to the opening 86 narrowing in the longitudinal direction, i.e. in the direction of passage of the lamellar element 1.
  • a variant provides that it is designed as a meander-shaped curved strip, with a connecting section 4 for connecting two slats 2 and one slat 2 being formed alternately on this, viewed in the direction of the strip, characterized in that the slat element 1 during production via the Connecting sections 4 is subjected to a pressing force, and/or that slats 2 of at least a subset of the slats 2 have at least one bead 22, 24, 26.
  • the lamellar element of the variant can be subjected to a further force during production in the longitudinal direction and/or transverse direction.
  • connection sections 4 of the variant can be deformed by the application of the pressing force applied via the connection sections 4 .
  • connection sections 4 of the variant can be deformed from a curved shape into an at least partially flat shape by the application of the pressing force applied via the connection sections 4 .
  • a radius can be provided between a respective connecting section and the lamella 2a, 2b connected to it.
  • a respective lamella 2 of the variant, together with its two connecting sections 4 , can form approximately a Z-shape, viewed in a flow direction 16 of the lamella element 1 .
  • a first bead 24 can be introduced from their one side surface 36 and a second bead 22 or two second beads 22, 26 can be introduced from their other side surface 34.
  • a respective bead 22 to 26 of the variant can extend approximately parallel to a longitudinal edge 28 of its lamella 2 .
  • two lateral beads 22, 26 can be introduced from one side surface 34 and a central bead 24 from the other side surface 36.
  • the beads 22 to 26 of the variant can be designed in such a way that a flow cross section between two adjacent lamellae 2a, 2b, viewed in the flow direction, remains essentially the same.
  • the bead or beadings of the variant can be introduced at approximately the same position in each lamella 2 .
  • At least a plurality of connecting sections 4 or all connecting sections 4 of the variant can be subjected to the pressing force essentially simultaneously.
  • Beads 22, 24, 26 are introduced into the band before or during the forming of the band.
  • the lamellar element 1 Before the pressing force is applied to the lamellar element 1 and/or approximately at the same time as the pressing force is applied to the lamellar element 1, the lamellar element 1 can be subjected to a force in the longitudinal direction and/or transverse direction.
  • a lamellar element which has lamellae which are connected to one another in one piece via connecting sections.
  • the lamellar element is subjected to a pressing force from its connecting sections during manufacture, with the result that at least partial areas of the connecting sections are plastically deformed.
  • beading has been incorporated into some or all of the slats.

Description

Die Erfindung geht aus von einem Lamellenelement gemäß dem Oberbegriff des Anspruchs 1 und einem Verfahren zur Herstellung eines Lamellenelements gemäß dem Oberbegriff des Anspruchs 7.The invention is based on a lamellar element according to the preamble of claim 1 and a method for producing a lamellar element according to the preamble of claim 7.

Solch ein Lamellenelement und solch ein Verfahren sind in der JP-A-H09280754 offenbart.Such a lamella element and such a method are in the JP-A-H09280754 disclosed.

Für den Einsatz in Kraftfahrzeugen, insbesondere solchen mit verbrauchsoptimierten Verbrennungsmotoren, werden Heizvorrichtungen zum Beheizen von einem Innenraum und einem Motor des Kraftfahrzeugs verwendet. Derartige Heizvorrichtungen sind allerdings auch für andere Einsatzzwecke in einem weiten Anwendungsgebiet geeignet, beispielsweise im Bereich von Hausinstallationen (Raumklimatisierung), Industrieanlagen und dergleichen. Üblicherweise weisen derartige Heizvorrichtungen, insbesondere solche mit PTC-Heizelementen (positive temperature coefficient, positiver Temperaturkoeffizient, Kaltleiter), Lamellenelemente auf, die zur Wärmeableitung eingesetzt sind. Unterstützt wird die Wärmeableitung der Lamellenelemente durch einen die Lamellenelemente umströmenden Luftstrom, der von einem Gebläse erzeugt wird.For use in motor vehicles, in particular those with consumption-optimized internal combustion engines, heating devices are used to heat an interior and an engine of the motor vehicle. However, such heating devices are also suitable for other purposes in a wide range of applications, for example in the field of domestic installations (air conditioning), industrial plants and the like. Such heating devices, in particular those with PTC heating elements (positive temperature coefficient, positive temperature coefficient, PTC thermistor), usually have lamellar elements that are used to dissipate heat. The heat dissipation of the lamellar elements is supported by an air current flowing around the lamellar elements, which is generated by a fan.

Aus der EP 1 327 834 A1 ist eine Heizvorrichtung mit Lamellenelementen bzw. Wellrippenelementen bekannt. Ein jeweiliges Lamellenelement hat eine Vielzahl von über Lamellenbögen bzw. Verbindungsabschnitte miteinander verbundener Lamellen. Lamellenbögen einer Seite des Lamellenelements sind an einem Radiatorblech befestigt. Über das Radiatorblech ist das Lamellenelement des Weiteren in seiner Längsrichtung gehaltert. Mit dem Radiatorblech ist das Lamellenelement lagefixiert und zwar sowohl in seiner Längs- als auch in seiner Querrichtung. Hierdurch kann es vergleichsweise einfach in die Heizvorrichtung montiert werden. Bei dieser Lösung ist nachteilig, dass zur Lagefixierung des Lamellenelements ein zusätzliches Bauteil, nämlich das Radiatorblech, benötigt wird.From the EP 1 327 834 A1 a heating device with lamellar elements or corrugated fin elements is known. A respective lamella element has a multiplicity of lamellas which are connected to one another via lamella arches or connecting sections. Fin arches of one side of the fin element are attached to a radiator panel. Furthermore, the lamellar element is held in its longitudinal direction via the radiator sheet. The lamellar element is fixed in position with the radiator sheet, both in its longitudinal and in its transverse direction. As a result, it can be mounted in the heating device comparatively easily. A disadvantage of this solution is that an additional component, namely the radiator sheet, is required to fix the position of the lamellar element.

In der EP 2 022 293 B1 ist eine weitere Heizvorrichtung offenbart. Diese hat ein Lamellenelement, das eine Vielzahl von über Verbindungsabschnitte miteinander verbundenen Lamellen aufweist. Benachbarte Verbindungsabschnitte sind zur Erhöhung einer Steifigkeit des Lamellenelements miteinander verlötet. Das Verlöten des Lamellenelements führt nachteilig zu einem hohen Herstellungsaufwand.In the EP 2 022 293 B1 another heating device is disclosed. This has a lamellar element which has a multiplicity of lamellas which are connected to one another via connecting sections. Adjacent connecting sections are soldered to one another in order to increase the rigidity of the lamellar element. The disadvantage of soldering the lamellar element is that it involves high production costs.

Demgegenüber liegt der Erfindung die Aufgabe zugrunde, ein Lamellenelement zu schaffen, das einfach und kostengünstig herstellbar, vorrichtungstechnisch einfach ausgestaltet und einfach montierbar ist. Eine weitere Aufgabe der Erfindung ist es, ein einfaches und kostengünstiges Verfahren zur Herstellung eines derartigen Lamellenelements zu schaffen.In contrast, the invention is based on the object of creating a lamellar element that can be produced easily and inexpensively, has a simple design in terms of device technology and is easy to assemble. A further object of the invention is to provide a simple and inexpensive method for producing such a lamellar element.

Die Aufgabe wird hinsichtlich des Lamellenelements gemäß den Merkmalen des Anspruchs 1 und hinsichtlich des Verfahrens gemäß den Merkmalen des Anspruchs 7 gelöst.The object is achieved with regard to the lamella element according to the features of claim 1 and with regard to the method according to the features of claim 7 .

Sonstige vorteilhafte Weiterbildungen der Erfindung sind Gegenstand weiterer Unteransprüche.Other advantageous developments of the invention are the subject of further dependent claims.

Erfindungsgemäß ist ein Lamellenelement bzw. eine Wellrippe als mäanderförmig gebogenes Band ausgebildet. In Bandrichtung gesehen hat das Lamellenelement wechselweise einen Verbindungsabschnitt zum Verbinden von zwei Lamellen und eine Lamelle. Vorzugsweise ist das Lamellenelement bei der Herstellung über eine Mehrzahl von Verbindungsabschnitten oder über alle Verbindungsabschnitte oder im Wesentlichen alle Verbindungsabschnitte mit einer Presskraft zur plastischen Verformung zumindest der kraftbeaufschlagten Verbindungsabschnitte beaufschlagt. Zusätzlich zur Presskraftbeaufschlagung sind Lamellen von zumindest einer Teilmenge der Lamellen oder alle Lamellen mit einer oder mehreren Sicken versehen.According to the invention, a lamellar element or a corrugated rib is designed as a meandering curved strip. Seen in the strip direction, the slat element alternately has a connecting section for connecting two slats and one slat. During production, the lamellar element is preferably subjected to a pressing force for plastic deformation of at least the force-loaded connecting sections via a plurality of connecting sections or via all connecting sections or essentially all connecting sections. In addition to the application of pressing force, lamellae of at least a subset of the lamellae or all lamellae are provided with one or more beads.

Die Beaufschlagung mit der Presskraft führt bei der Herstellung dazu, dass eine Steifigkeit des Lamellenelements deutlich erhöht ist. Somit kann beispielsweise auf das im eingangs erläuterten Stand der Technik vorgesehene Radiatorblech bzw. auf ein Verlöten der Verbindungsabschnitte verzichtet werden, um das Lamellenelement einfach montieren zu können. Somit führt eine derartige Steifigkeitserhöhung zu einer besseren Handhabarkeit des Lamellenelements und dementsprechend zu einer einfacheren Montierbarkeit. Außerdem wird ein "Aufspringen" des Lamellenelements vermieden. Ein Einbringen von Sicken in Lamellen führt ebenfalls zu einer deutlichen Erhöhung einer Steifigkeit des Lamellenelements. Ist ein Lamellenelement bei der Herstellung mit einer Presskraft beaufschlagt und hat es zusätzlich Sicken, so führt diese Kombination zu einer überragend hohen Steifigkeit.During production, the application of the pressing force results in the rigidity of the lamellar element being significantly increased. It is thus possible, for example, to dispense with the radiator sheet provided in the prior art explained at the beginning or with soldering of the connecting sections in order to form the lamellar element easy to assemble. Such an increase in rigidity thus leads to better handling of the lamellar element and accordingly to easier assembly. In addition, the lamellar element is prevented from "jumping open". Introducing beads into slats also leads to a significant increase in the rigidity of the slat element. If a lamellar element is subjected to a pressing force during manufacture and if it also has beads, this combination leads to an exceptionally high level of rigidity.

Vorzugsweise ist in einer ersten Ausführungsform bei den presskraftbeaufschlagten Verbindungsabschnitten durch die Beaufschlagung mit der Presskraft jeweils nur ein Teilbereich plastisch umgeformt, womit der übrige Bereich im Wesentlichen in seiner ursprünglichen Form verbleiben kann. Es hat sich überraschenderweise gezeigt, dass nicht der gesamte Verbindungsabschnitt verformt werden muss, um eine ausreichend hohe Steifigkeit des Lamellenelements zu erreichen. Da nicht der gesamte Verbindungsabschnitt verformt ist, ist eine Herstellung des Lamellenelements ebenfalls vereinfacht. Ferner hat sich gezeigt, dass eine derartige Ausgestaltung besonders gut für einen kontinuierlichen Herstellungsprozess des Lamellenelements geeignet ist, in dem dieses beispielsweise einfach durch ein Werkzeug mit einer sich verjüngenden Öffnung geführt wird, die derart ausgestaltet ist, dass nur die Teilbereiche verformt werden. Die hierdurch auftretenden Presskräfte sind vergleichsweise gering.Preferably, in a first embodiment, only a partial area is plastically deformed in each case in the connection sections subjected to a pressing force by the application of the pressing force, with the result that the remaining area can essentially remain in its original shape. Surprisingly, it has been shown that the entire connecting section does not have to be deformed in order to achieve sufficiently high rigidity of the lamellar element. Since the entire connection section is not deformed, manufacture of the lamellar element is also simplified. Furthermore, it has been shown that such a configuration is particularly well suited for a continuous production process of the lamellar element, in which this is simply guided through a tool with a tapering opening, which is designed such that only the partial areas are deformed. The pressing forces that occur as a result are comparatively low.

Bei dem Teilbereich eines Verbindungsabschnitts handelt es sich vorzugsweise um einen freien Randbereich. In weiterer Ausgestaltung der Erfindung sind beide Randbereiche eines jeweiligen presskraftbeaufschlagten Verbindungsabschnitts plastisch umgeformt, was eine Steifigkeit weiter erhöht und eine symmetrische Versteifung des Lamellenelements ermöglicht.The partial area of a connecting section is preferably a free edge area. In a further embodiment of the invention, both edge regions of a respective connecting section subjected to a pressing force are plastically deformed, which further increases rigidity and enables symmetrical stiffening of the lamellar element.

Ein jeweiliger presskraftbeaufschlagter Verbindungsabschnitt kann zwischen seinen Randbereichen im Querschnitt gesehen bogenförmig ausgestaltet ist. Der Verbindungsabschnitt kann somit beispielsweise seine ursprüngliche Form in seinem mittleren Bereich beibehalten, was dazu führt, dass eine maximale Höhe des Lamellenelements einer Höhe von bekannten nicht presskraftbeaufschlagten Lamellenelementen entspricht. Somit können bei dem erfindungsgemäßen Lamellenelement die Abmessungen aus dem Stand der Technik im Wesentlichen beibehalten werden, womit eine Heizvorrichtung, die diese Lamellenelemente einsetzt, nicht umkonstruiert werden muss.A respective connection section to which a pressing force is applied can be configured in an arc shape between its edge regions, viewed in cross section. The connecting section can thus, for example, retain its original shape in its middle area, which means that a maximum height of the lamellar element is a height of known heights that are not subjected to a pressing force Corresponds to lamellar elements. Thus, in the case of the lamellar element according to the invention, the dimensions from the prior art can essentially be retained, with the result that a heating device which uses these lamellar elements does not have to be redesigned.

Mit Vorteil ist ein jeweiliger umgeformter Randbereich einfach abgeflacht, womit das zugehörige Werkzeug einfach ausgestaltet werden kann.Advantageously, a respective formed edge area is simply flattened, with which the associated tool can be easily configured.

Vorzugsweise sind alle Verbindungsabschnitte plastisch umgeformt.All connecting sections are preferably plastically deformed.

Bei einer weiteren bevorzugten Ausführungsform kann die ie Beaufschlagung des Lamellenelements bei der Herstellung mit der Presskraft zu einer planaren Oberfläche im Bereich seiner Verbindungsabschnitte führen, womit Unebenheiten ausgeglichen werden können. Dies ist äußerst vorteilhaft zum Ansetzen von beispielsweise PTC-Heizelementen, da eine Kontakt- bzw. Anlagefläche zwischen den PTC-Heizelementen und dem Lamellenelement im Wesentlichen eben ist. Hierdurch ist des Weiteren eine hohe elektrische Leitfähigkeit und hohe Wärmeleitfähigkeit zwischen den PTC-Elementen und dem Lamellenelement geschaffen.In a further preferred embodiment, the application of the pressing force to the lamellar element during production can result in a planar surface in the region of its connecting sections, with which unevenness can be compensated for. This is extremely advantageous for attaching PTC heating elements, for example, since a contact or contact surface between the PTC heating elements and the lamellar element is essentially flat. This also creates high electrical conductivity and high thermal conductivity between the PTC elements and the lamellar element.

Mit den Verbindungsabschnitten sind vorzugsweise - insbesondere bei allen Ausführungsformen - zwei zueinander beabstandete Funktionsseiten des Lamellenelements gebildet, zwischen denen die Lamellen angeordnet sind. Bei der Herstellung des Lamellenelements wird dieses dann gleichzeitig von beiden Funktionsseiten her mit der Presskraft von außen beaufschlagt.Two functional sides of the lamella element which are spaced apart from one another and between which the lamellas are arranged are preferably formed with the connecting sections, in particular in all of the embodiments. During the manufacture of the lamellar element, the pressing force is applied to it from both functional sides simultaneously from the outside.

Zusätzlich zur Presskraft über die Verbindungsabschnitte kann das Lamellenelement bei der Herstellung in Längsrichtung mit einer weiteren Kraft, insbesondere einer Haltekraft zum Halten des Lamellenelements oder einer Presskraft zum Stauchen des Lamellenelements, beaufschlagt sein. Diese weitere Kraft ist dann etwa in eine parallel zu den Funktionsseiten verlaufende Richtung gerichtet. Es hat sich gezeigt, dass durch diese Maßnahme eine Steifigkeit des Lamellenelements noch weiter erhöht werden kann und/oder das Lamellenelement bei der Herstellung sicher gehalten werden kann. Außerdem kann ein Abstand zwischen den Verbindungsabschnitten der Funktionsseiten verringert werden, womit das Lamellenelement eine kompakte Ausgestaltung aufweist.In addition to the pressing force via the connecting sections, the lamellar element can be subjected to a further force during production in the longitudinal direction, in particular a holding force for holding the lamellar element or a pressing force for upsetting the lamellar element. This additional force is then directed approximately in a direction running parallel to the functional sides. It has been shown that this measure can further increase the rigidity of the lamellar element and/or the lamellar element can be held securely during production. In addition, a distance between the Connecting portions of the function pages are reduced, so that the lamellar element has a compact design.

Vorzugsweise sind zumindest die Verbindungsabschnitte durch die Beaufschlagung mit der über die Verbindungsabschnitte beaufschlagten Presskraft plastisch umgeformt.Preferably, at least the connecting sections are plastically deformed by the application of the pressing force applied via the connecting sections.

Beispielsweise werden die Verbindungsabschnitte bei der weiteren Ausführungsform durch die Beaufschlagung mit der Presskraft von einer gekrümmten Form in eine zumindest abschnittsweise ebene Form umgeformt. Somit werden die die Lamellen verbindenden Scheitel planiert. Eine Stauchung der Verbindungsabschnitte kann bei durch die Presskraftbeaufschlagung über die Verbindungsabschnitte beispielsweise zwischen 0,2 und 0,5mm liegen.For example, in the further embodiment, the connection sections are deformed by the application of the pressing force from a curved shape into a shape that is flat at least in sections. Thus, the crests connecting the slats are leveled. Compression of the connecting sections can be between 0.2 and 0.5 mm, for example, as a result of the pressurizing force being applied via the connecting sections.

Es ist denkbar, dass die Beaufschlagung der Verbindungsabschnitte mit der Presskraft derart erfolgt, dass auch die Lamellen etwas plastisch deformiert werden.It is conceivable for the connecting sections to be subjected to the pressing force in such a way that the lamellae are also somewhat plastically deformed.

Im Übergangsbereich zwischen einem jeweiligen Verbindungsabschnitt und dem mit diesem verbundenen Lamellen kann ein Radius vorgesehen sein. Hierdurch ist zwischen benachbarten Verbindungsabschnitten ein Aufnahmeraum ausgebildet, in dem beim Verkleben von beispielsweise PTC-Heizelementen mit dem Lamellenelement Klebstoff verdrängt werden kann. Hierdurch ist eine bessere Stromeinleitung ermöglicht und eine Fertigung optimiert.A radius can be provided in the transition area between a respective connecting section and the lamella connected to it. As a result, a receiving space is formed between adjacent connecting sections, in which adhesive can be displaced when gluing, for example, PTC heating elements to the lamellar element. This enables better current introduction and optimizes production.

Vorzugsweise hat eine Lamelle zusammen mit ihren beiden Verbindungsabschnitten in einer Durchströmungsrichtung des Lamellenelements gesehen eine etwa Z-Form.A lamella, together with its two connecting sections, preferably has an approximately Z-shape as seen in a flow direction of the lamella element.

Bevorzugterweise sind die über einen Verbindungsabschnitt miteinander verbundenen Lamellen mit ihren vom Verbindungsabschnitt entfernten Endabschnitten aneinander angenähert. Zusätzlich oder alternativ können die Endabschnitte aneinander anliegen. Durch die aneinander angenäherten oder aneinander anliegenden Endabschnitte der Lamellen können darin eingebrachte Sicken von jeweils benachbarten Lamellen abschnittsweise ineinander tauchen, wodurch sich die Lamellen über ihre Sicken dann gegenseitig übergreifen. Dies führt zu einer zusätzlichen Stabilität des Lamellenelements.The slats connected to one another via a connecting section are preferably brought closer together with their end sections remote from the connecting section. Additionally or alternatively, the end sections can rest against one another. By approaching each other or abutting end portions of the slats can be introduced beads of each adjacent slats dive into each other in sections, whereby the slats then overlap each other via their beads. This leads to additional stability of the lamellar element.

In weiterer Ausgestaltung der Erfindung haben zumindest die Lamellen der Teilmenge oder alle Lamellen drei Sicken. Diese können etwa gleich ausgestaltet sein. Des Weiteren können sie sich über einen Großteil der Lamelle erstrecken.In a further embodiment of the invention, at least the lamellae of the subset or all lamellae have three beads. These can be configured approximately the same. Furthermore, they can extend over a large part of the lamella.

Mit Vorteil sind zumindest in die Lamellen der Teilmenge oder in alle Lamellen jeweils von ihrer einen Seitenfläche her eine erste Sicke und von ihrer anderen Seitenfläche her eine zweite Sicke oder zwei zweite Sicken eingebracht. Diese wechselseitigen Vertiefungen führen zu einer zusätzlichen Erhöhung der Steifigkeit des Lamellenelements.Advantageously, at least in the lamellas of the subset or in all lamellas, a first bead is introduced from their one side surface and a second bead or two second beads are introduced from their other side surface. These alternating indentations lead to an additional increase in the rigidity of the lamellar element.

Eine jeweilige Sicke erstreckt sich vorzugsweise etwas parallel zu einer Längskante ihrer Lamelle. Diese Ausgestaltung und Anordnung der Sicken hat sich als äußerst vorteilhaft erwiesen, um eine Steifigkeit des Lamellenelements zu steigern.A respective bead preferably extends somewhat parallel to a longitudinal edge of its lamella. This configuration and arrangement of the beads has proven to be extremely advantageous in order to increase the rigidity of the lamellar element.

Die Sicken können jeweils vorrichtungstechnisch einfach länglich ausgebildet sein und beispielsweise etwas zu den Verbindungsabschnitten beabstandet sein. Bei einer Mehrzahl von Sicken in einer Lamelle sind diese dann etwa in Parallelabstand zueinander. Ein Abstand zwischen den Sicken ist dabei vorzugsweise im Wesentlichen gleich. Es ist denkbar, dass sich bei drei Sicken die mittlere Sicke ihre Längsflanken mit den seitlichen Sicken teilt.The beads can each be elongate in a simple manner in terms of device technology and, for example, be spaced somewhat from the connecting sections. If there are a plurality of beads in a lamella, these are then approximately at a parallel distance from one another. A distance between the beads is preferably essentially the same. It is conceivable that with three beads, the middle bead shares its longitudinal flanks with the side beads.

In weiterer Ausgestaltung der Erfindung sind zumindest in den Lamellen der Teilmenge oder in alle Lamellen zwei seitliche Sicken von einer Seitenfläche her und eine mittlere Sicke von der anderen Seitenfläche her in diese eingebracht.In a further embodiment of the invention, at least in the lamellae of the subset or in all lamellae, two lateral beads are introduced from one side surface and a central bead is introduced into this from the other side surface.

Bevorzugterweise sind die Sicken derart ausgebildet, dass jeweils zwischen zwei benachbarten Lamellen ein Strömungsquerschnitt in Durchströmungsrichtung gesehen im Wesentlichen gleich bleibt. Das heißt, das in einer Ebene, die sich etwa parallel zu den Funktionsseiten des Lamellenelements durch die Lamellen erstreckt, ein Abstand zwischen jeweils zwei benachbarten Lamellen im Wesentlich gleich ist. Hierdurch wird ein Druckverlust bei einer Durchströmung eines Fluids durch das Lamellenelement vermieden.The beads are preferably designed in such a way that a flow cross section between two adjacent lamellae, viewed in the direction of flow, remains essentially the same. This means that in a plane which extends through the slats approximately parallel to the functional sides of the slat element, there is a distance between any two adjacent slats is substantially the same. This avoids a pressure loss when a fluid flows through the lamellar element.

Zur Vermeidung der Veränderung des Strömungsquerschnitts des Lamellenelements aufgrund der Sicken sind vorzugsweise die Sicken bei jeder Lamelle etwa in einer gleichen Position eingebracht. Auswölbungen von Sicken gleicher Position haben dann eine gleiche Orientierung. Somit bleibt durch die im Wesentlichen gleich ausgestalteten und gleich angeordneten Sicken des Lamellenelements der Strömungsquerschnitt in der Durchströmungsrichtung des Fluids zwischen zwei benachbarten Lamellen im Wesentlichen gleich.In order to avoid the change in the flow cross section of the lamellar element due to the beads, the beads are preferably placed in approximately the same position for each lamella. Bulges from beads in the same position then have the same orientation. The flow cross-section in the direction of flow of the fluid between two adjacent lamellas thus remains essentially the same due to the beads of the lamellar element being configured and arranged essentially the same way.

Erfindungsgemäß ist ein Verfahren zur Herstellung eines Lamellenelements mit folgenden Schritten vorgesehen:

  • In einem ersten Schritt wird ein Band zu dem Lamellenelement bzw. zu der Wellrippe umgeformt. Die Umformung erfolgt hierbei vorzugsweise derart, dass in Richtung des Bands gesehen wechselweise der Verbindungsabschnitt und die Lamelle ausgebildet sind. Die Verbindungsabschnitte können hierbei vorzugsweise abschnittsweise nach außen gekrümmt sein.
  • In einem weiteren Schritt kann das Lamellenelement über die Verbindungsabschnitte in Richtung der Lamellen von beiden Seiten des Lamellenelements her mit einer äußeren, insbesondere großflächigen Presskraft zur plastischen Verformung, insbesondere aller Verbindungsabschnitte, beaufschlagt werden.
According to the invention, a method for producing a lamella element is provided with the following steps:
  • In a first step, a strip is formed into the lamella element or the corrugated rib. The reshaping is preferably carried out in such a way that the connecting section and the lamella are formed alternately, viewed in the direction of the strip. In this case, the connecting sections can preferably be curved outwards in sections.
  • In a further step, the lamellar element can be acted upon from both sides of the lamellar element via the connecting sections in the direction of the lamellae with an external, in particular large-area, pressing force for plastic deformation, in particular of all connecting sections.

Durch das erfindungsgemäße Verfahren kann mit wenigen und einfachen Verfahrensschritten ein Lamellenelement hergestellt werden, das eine hohe Steifigkeit aufweist und somit im Unterschied zum Stand der Technik kein zusätzliches Radiatorblech oder eine Verlötung von Verbindungsabschnitten benötigt.With the method according to the invention, a lamellar element can be produced with a few simple method steps, which has a high degree of rigidity and therefore, in contrast to the prior art, does not require any additional radiator sheet metal or soldering of connecting sections.

Alternativ ist für den weiteren Schritt denkbar, dass die Verbindungsabschnitte einer jeweiligen Seite des Lamellenelements nacheinander mit der Presskraft in Richtung der Lamellen beaufschlagt werden, was zu einer kontinuierlichen Fertigung führen würde. Es ist weiter denkbar, dass jeweils zumindest zwei gegenüberliegende Verbindungsabschnitte hierbei etwa gleichzeitig mit der Presskraft beaufschlagt sein können. Diese kontinuierliche Fertigung erfolgt beispielsweise über zwei Walzen, zwischen denen das Lamellenelement, nachdem es zur Wellrippe umgeformt wurde, hindurchgeführt wird. Oder es kann ein Werkzeug mit einer sich in Durchführrichtung verjüngenden Öffnung vorgesehen sein.Alternatively, it is conceivable for the further step that the connecting sections of a respective side of the lamellar element are successively subjected to the pressing force in the direction of the lamellae, which leads to continuous production would lead. It is also conceivable that in each case at least two opposing connecting sections can be acted upon by the pressing force at about the same time. This continuous production takes place, for example, via two rollers between which the lamellar element is passed after it has been formed into a corrugated rib. Or a tool can be provided with an opening that tapers in the direction of passage.

Zum Einbringen von Sicken in das Lamellenelement wird das Band vorzugsweise vor dem Legen zur Wellrippe geprägt.In order to introduce beads into the lamellar element, the band is preferably embossed before it is laid to form the corrugated rib.

Wie vorstehend bereits erläutert, wird das Band derart umgeformt, dass die Verbindungsabschnitte vor der Beaufschlagung des Lamellenelements mit der Presskraft zumindest abschnittsweise gekrümmt sind. Die Verbindungsabschnitte erstrecken sich somit in Bandrichtung gesehen jeweils etwa entlang einer Kurve. Die Beaufschlagung der Presskraft über die Verbindungsabschnitte erfolgt dann bei der weiteren Ausführungsform vorzugsweise derart, dass die gekrümmten Verbindungsabschnitte abgeflacht werden und das Lamellenelement somit planiert ist.As already explained above, the strip is deformed in such a way that the connecting sections are curved at least in sections before the lamellar element is subjected to the pressing force. Viewed in the direction of the strip, the connecting sections thus each extend approximately along a curve. In the further embodiment, the pressing force is then applied via the connecting sections, preferably in such a way that the curved connecting sections are flattened and the lamellar element is thus leveled.

Etwa gleichzeitig bzw. zumindest abschnittsweise synchron zum Beaufschlagen des Lamellenelements mit der Presskraft von den Verbindungsabschnitten her kann dieses in Längsrichtung mit einer Kraft, insbesondere Presskraft, zum Stauchen beaufschlagt sein, um eine Steifigkeit weiter zu erhöhen.Roughly at the same time or at least in sections synchronously with the pressing force applied to the lamellar element from the connecting sections, it can be subjected to a force, in particular a pressing force, for compression in the longitudinal direction in order to further increase rigidity.

Alternativ ist denkbar, dass bei der weiteren Ausführungsform die in Längsrichtung auf das Lamellenelement wirkende Kraft eine Haltekraft ist, die vor und/oder etwa gleichzeitig zum Beaufschlagen des Lamellenelements mit der Presskraft aufgebracht wird. Somit kann das Lamellenelement durch die Haltekraft längsfixiert werden und anschließend über die Verbindungsabschnitte verpresst werden beziehungsweise kann das Lamellenelement in Längsrichtung zusammengedrückt werden und in ihrer definierten Länge festgehalten (fixiert) werden und anschließend über die Verbindungsabschnitte verpresst werden. Ein Werkzeug zur Herstellung des Lamellenelements wird dann in der Endposition geeignet fixiert bevor die Presskraft über die Verbindungsabschnitte aufgebracht wird.Alternatively, it is conceivable that in the further embodiment the force acting in the longitudinal direction on the lamellar element is a holding force which is applied before and/or approximately at the same time as the pressing force is applied to the lamellar element. Thus, the lamellar element can be longitudinally fixed by the holding force and then pressed over the connecting sections or the lamellar element can be pressed together in the longitudinal direction and held (fixed) in its defined length and then pressed over the connecting sections. A tool for producing the lamella element is then suitably fixed in the end position before the pressing force is applied via the connecting sections.

Zusätzlich oder Alternativ zur Längsfixierung kann das Lamellenelement vor und/oder gleichzeitig zu der Beaufschlagung mit der Presskraft von beiden Seiten her querfixiert sein. Die Querfixierung erfolgt in Querrichtung, das heißt etwa in Durchströmungsrichtung des Lamellenelements beziehungsweise in Richtung der vom Lamellenelement festgelegten Breite. Durch die Querfixierung wird ein "seitliches herausspringen" des gestauchten Lamellenelements aus dem Werkzeug zur Herstellung vermieden.In addition or as an alternative to the longitudinal fixation, the lamellar element can be transversely fixed before and/or at the same time as the pressing force is applied from both sides. The transverse fixation takes place in the transverse direction, ie approximately in the flow direction of the lamellar element or in the direction of the width defined by the lamellar element. The transverse fixation prevents the compressed lamellar element from “jumping out laterally” from the production tool.

Nach dem Beaufschlagen des Lamellenelements mit der Presskraft kann zumindest auf einer Funktionsseite des Lamellenelements ein Heizelement, insbesondere ein PTC-Heizelement, angeordnet werden. Das Heizelement wird hierbei vorzugsweise mit dem Lamellenelement verklebt oder verklemmt.After the pressing force has been applied to the lamellar element, a heating element, in particular a PTC heating element, can be arranged at least on one functional side of the lamellar element. In this case, the heating element is preferably glued or clamped to the lamellar element.

Beispielsweise ist ein Werkzeug zum Herstellen eines Lamellenelements gemäß einem der vorhergehenden Aspekte vorgesehen, wobei das Werkzeug nicht den Gegenstand der vorliegenden Erfindung betrifft, sondern als Beispiel allein deren Erläuterung dient. Das Werkzeug hat vorzugsweise einen einteiligen oder mehrteiligen Werkzeugkörper mit einer Öffnung, durch die das Lamellenelement zum Umformen hindurchführbar ist, wobei ein Öffnungsquerschnitt der Öffnung derart ausgestaltet ist, dass das Lamellenelement beim Durchführen von einer Presskraft beaufschlagt ist. Durch das Werkzeug können die Seiten des Lamellenelements kontinuierlich niedergedrückt und versteift werden.For example, a tool for producing a lamellar element is provided according to one of the preceding aspects, the tool not relating to the subject matter of the present invention but serving as an example solely to explain it. The tool preferably has a one-piece or multi-piece tool body with an opening through which the lamellar element can be passed for forming, wherein an opening cross section of the opening is designed such that the lamellar element is subjected to a pressing force when it is carried out. The tool allows the sides of the lamellar element to be continuously depressed and stiffened.

Das Werkzeug kann beispielsweise als eine Art vierseitiger Ziehkeil ausgebildet sein.The tool can be designed, for example, as a kind of four-sided draw key.

Alternativ wäre denkbar Rollen zum Umformen des Lamellenelements vorzusehen.Alternatively, it would be conceivable to provide rollers for shaping the lamellar element.

Vorzugsweise wird das Werkzeug am Ende einer Endlosfertigung des Lamellenelements angeordnet.The tool is preferably arranged at the end of a continuous production of the lamellar element.

In weiterer Ausgestaltung hat die Öffnung eine oder mehrere - beispielsweise in einer Ebene sich erstreckende - Kanten zum Umformen der Teilbereiche des Lamellenelements. Alternativ kann die Öffnung für jeden umzuformenden Teilbereich des Lamellenelements eine sich etwa in Längsrichtung erstreckende Keilfläche zur stetigen Presskraftbeaufschlagung aufweisen.In a further embodiment, the opening has one or more edges--extending, for example, in one plane--for reshaping the partial areas of the lamellar element. Alternatively, the opening for each partial area of the lamellar element to be formed can have a wedge surface extending approximately in the longitudinal direction for the constant application of a pressing force.

Die Öffnung erstreckt sich vorzugsweise entlang einer Längsrichtung, wobei sich ein Querschnitt der Öffnung in Längsrichtung gesehen (insbesondere durch die Keilflächen) verkleinert oder verjüngt.The opening preferably extends along a longitudinal direction, with a cross section of the opening seen in the longitudinal direction becoming smaller or tapering (in particular through the wedge surfaces).

Ferner ist die Öffnung bevorzugterweise derart ausgestaltet ist, dass das durch die Durchgangsaussparung hindurchgeführte Lamellenelement während der Presskraftbeaufschlagung (vorzugsweise nur) mit seinen umzuformenden Teilbereichen an der einen Keilfläche oder der Mehrzahl von Keilflächen der Öffnung anliegt.Furthermore, the opening is preferably designed in such a way that the lamellar element passed through the through-hole rests (preferably only) with its partial areas to be deformed against the one wedge surface or the plurality of wedge surfaces of the opening during the application of the pressing force.

Denkbar ist auch, dass das Werkzeug Keilflächen oder Kanten zum gesamten Umformen des Verbindungsabschnitts gemäß der weiteren Ausführungsform des Lamellenelements aufweist.It is also conceivable that the tool has wedge surfaces or edges for the entire reshaping of the connecting section according to the further embodiment of the lamellar element.

Vorzugsweise sind zwei, drei oder vier Keilflächen oder Kanten vorgesehen, um entsprechend zwei, drei oder alle Eckbereiche des Lamellenelements umzuformen.Two, three or four wedge surfaces or edges are preferably provided in order to correspondingly reshape two, three or all of the corner regions of the lamellar element.

Im Folgenden wird eine bevorzugte Ausführungsform der Erfindung anhand von Zeichnungen näher erläutert. Es zeigen:

  • Figur 1 in einer perspektivischen Darstellung ein erfindungsgemäßes Lamellenelement gemäß einem ersten Ausführungsbeispiel,
  • Figur 2 einem vergrößerten Ausschnitt des Lamellenelements aus Figur 1,
  • Figur 3 in einer perspektivischen Darstellung das noch nicht vollständig gefertigte Lamellenelement,
  • Figur 4 einem vergrößerten Ausschnitt des Lamellenelements aus Figur 3,
  • Figur 5 in einer perspektivischen Darstellung eine Lamellenelementanordnung,
  • Figur 6 in einem vergrößerten Ausschnitt die Lamellenelementanordnung aus Figur 5 mit einem Ausbruch,
  • Figur 7 in einer schematischen Darstellung ein Werkzeug zum Beaufschlagen des Lamellenelements mit einer Presskraft gemäß einem ersten Ausführungsbeispiel,
  • Figur 8 in einer perspektivischen Darstellung das erfindungsgemäße Lamellenelement gemäß einem zweiten Ausführungsbeispiel,
  • Figur 9 einem vergrößerten Ausschnitt des Lamellenelements aus Figur 8 und
  • Figur 10 in einer schematischen Darstellung das Werkzeug zum Beaufschlagen des Lamellenelements mit einer Presskraft gemäß einem zweiten Ausführungsbeispiel.
A preferred embodiment of the invention is explained in more detail below with reference to drawings. Show it:
  • figure 1 in a perspective view a lamella element according to the invention according to a first embodiment,
  • figure 2 an enlarged section of the lamellar element figure 1 ,
  • figure 3 in a perspective view the not yet fully manufactured lamellar element,
  • figure 4 an enlarged section of the lamellar element figure 3 ,
  • figure 5 a perspective view of a lamellar element arrangement,
  • figure 6 the lamellar element arrangement in an enlarged detail figure 5 with a burst
  • figure 7 in a schematic representation, a tool for applying a pressing force to the lamellar element according to a first exemplary embodiment,
  • figure 8 in a perspective view of the lamella element according to the invention according to a second embodiment,
  • figure 9 an enlarged section of the lamellar element figure 8 and
  • figure 10 in a schematic representation, the tool for applying a pressing force to the lamellar element according to a second exemplary embodiment.

Das in Figuren 7 und 10 dargestellte Werkzeug zum Beaufschlagen des Lamellenelements mit einer Presskraft betrifft nicht den Gegenstand der vorliegenden Erfindung, sondern als Beispiel allein deren Erläuterung.This in figures 7 and 10 The tool shown for subjecting the lamellar element to a pressing force does not relate to the subject matter of the present invention, but merely as an example to explain it.

Gemäß Figur 1 ist das Lamellenelement 1 mäanderförmig ausgestaltet. Es ist aus einem gelegten Band hergestellt, wobei in Bandrichtung abwechselnd eine Lamelle 2 und ein Verbindungsabschnitt 4 ausgebildet sind. Die Verbindungsabschnitte 4 des Lamellenelements 1 bilden dann eine erste und zweite Funktionsseite 6 bzw. 8 des Lamellenelements 1.According to figure 1 the lamellar element 1 is configured in a meandering shape. It is made from a laid strip, with a lamella 2 and a connecting section 4 being formed alternately in the direction of the strip. The connecting sections 4 of the lamellar element 1 then form a first and second functional side 6 and 8 of the lamellar element 1.

Gemäß Figur 2 ist das Lamellenelement 1 derart ausgestaltet, dass jeweils Endabschnitte 10a, 10b von jeweils zwei benachbarten Lamellen 2a, 2b, die vom Verbindungsabschnitt 4 dieser Lamellen 2a, 2b beabstandet sind, aneinander anliegen oder zumindest angenähert sind. Benachbarte Lamellen 2a, 2b nähern sich somit ausgehend von ihrem Verbindungsabschnitt 4 aneinander an.According to figure 2 the lamellar element 1 is designed such that the respective end sections 10a, 10b of two adjacent lamellae 2a, 2b, which are spaced apart from the connecting section 4 of these lamellae 2a, 2b, abut one another or are at least approximated. Adjacent slats 2a, 2b thus approach one another, starting from their connecting section 4.

Das Lamellenelement 1 wird bei der Herstellung von beiden Funktionsseiten 6 und 8 her über seine Verbindungsabschnitte 4 mit einer flächigen Presskraft beaufschlagt, die etwa normal zu den Funktionsseiten 6 und 8 wirkt. Hierdurch werden die Verbindungsabschnitte 4 plastisch umgeformt und haben jeweils einen eine etwa ebene Außenfläche 12 aufweisenden Flachabschnitt 14. Die Außenflächen 12 der Verbindungsabschnitte 4 auf einer jeweiligen Funktionsseite 6 bzw. 8 spannen dann jeweils eine Ebene auf. Die Flachabschnitte 14 erstrecken sich jeweils über die gesamte Breite des Lamellenelements 1 in einer Durchströmungsrichtung 16 gesehen. Eine Breite der Flachabschnitte 14 quer zur Durchströmungsrichtung 16 gesehen ist im Wesentlichen konstant. Eine jeweilige Lamelle 2 ist mit ihrem jeweiligen Verbindungsabschnitt 4 über einen gekrümmten Abschnitt 18a bzw. 18b verbunden. Ein jeweiliger gekrümmter Abschnitt 18a und 18b erstreckt sich ausgehend vom Flachabschnitt 14 zum jeweiligen Endabschnitt 10b bzw. 10a der Lamellen 2a bzw. 2b. Durch die ausgehend vom Flachabschnitt 14 hin zu den Lamellen 2 gekrümmten Abschnitte 18a und 18b ist jeweils zwischen zwei benachbarten Verbindungsabschnitten 4a und 4b ein Aufnahmeraum 20 ausgebildet. Wird beispielsweise ein PTC-Heizelement auf die Funktionsseite 6 und/oder 8 über einen Klebstoff angebracht, so kann dieser Klebstoff in die Aufnahmeräume 20 zwischen den Verbindungsabschnitten 4 verdrängt werden.During manufacture, the lamellar element 1 is subjected to a flat pressing force from both functional sides 6 and 8 via its connecting sections 4 , which acts approximately normal to the functional sides 6 and 8 . As a result, the connecting sections 4 are plastically deformed and each have a flat section 14 having an approximately planar outer surface 12. The outer surfaces 12 of the connecting sections 4 on a respective functional side 6 or 8 then each span a plane. The flat sections 14 each extend over the entire width of the lamellar element 1 viewed in a flow direction 16 . A width of the flat sections 14 seen transversely to the direction of flow 16 is in essentially constant. A respective slat 2 is connected to its respective connecting section 4 via a curved section 18a or 18b. A respective curved section 18a and 18b extends from the flat section 14 to the respective end section 10b or 10a of the slats 2a or 2b. Due to the curved sections 18a and 18b, starting from the flat section 14 towards the lamellae 2, a receiving space 20 is formed between two adjacent connecting sections 4a and 4b. If, for example, a PTC heating element is attached to the functional side 6 and/or 8 via an adhesive, this adhesive can be displaced into the receiving spaces 20 between the connecting sections 4 .

In eine jeweilige Lamelle 2 sind drei Sicken 22, 24 und 26 eingebracht. Diese sind jeweils länglich ausgestaltet und erstrecken sich im Parallelabstand zur Längskante 28 der Lamelle 2, in der sie eingebracht sind. Die Sicken 22 bis 26 sind zueinander beabstandet. Alternativ ist denkbar, dass benachbarte Sicken 22 bis 26 einer Lamelle 2 sich ihre Längsflanken 30a bis 30d teilen. Im vorliegenden Ausführungsbeispiel sind die Sicken 22 bis 26 in Durchströmungsrichtung 16 gesehen gleichmäßig voneinander beabstandet. Die Sicken 22 und 26 sind dabei in einem Außenbereich der Lamelle 2 eingebracht und die Sicke 24 ist zwischen diesen Sicken 22 und 26 mittig der Lamelle 2 ausgebildet. Ein Abstand der Sicken, in Durchströmungsrichtung 16 gesehen, zueinander entspricht etwa dem Abstand der äußeren Sicken 22 und 26 zu ihrer benachbarten Längskante 28 bzw. 32. Die Sicken 22 bis 26 enden vorzugsweise jeweils vor dem Verbindungsabschnitt 4 ihrer Lamelle 2. Allerdings ist denkbar, dass die Sicken 22 bis 26 sich in einen oder beide Verbindungsabschnitte 4 ihrer Lamelle 2 erstrecken. Des Weiteren ist denkbar, dass sie sich zusätzlich in einen oder beide Flachabschnitte 14 des Verbindungsabschnitts 4 ihrer Lamelle 2 erstrecken.In each lamella 2 three beads 22, 24 and 26 are introduced. These are each elongate and extend at a parallel distance from the longitudinal edge 28 of the lamella 2 in which they are introduced. The beads 22 to 26 are spaced apart from one another. Alternatively, it is conceivable that adjacent beads 22 to 26 of a lamella 2 share their longitudinal flanks 30a to 30d. In the present exemplary embodiment, the beads 22 to 26 are evenly spaced apart from one another as viewed in the direction of flow 16 . The beads 22 and 26 are introduced in an outer area of the lamella 2 and the bead 24 is formed between these beads 22 and 26 in the middle of the lamella 2 . A distance between the beads, viewed in the flow direction 16, corresponds approximately to the distance between the outer beads 22 and 26 and their adjacent longitudinal edge 28 or 32. The beads 22 to 26 preferably end in front of the connecting section 4 of their lamella 2. However, it is conceivable that the beads 22 to 26 extend into one or both connecting sections 4 of their lamella 2. Furthermore, it is conceivable that they also extend into one or both flat sections 14 of the connecting section 4 of their lamella 2 .

Die zwei äußeren Sicken 22 und 26 einer jeweiligen Lamelle 2 sind von einer ersten Seitenfläche 34 und die mittlere Sicke 24 von der anderen Seitenfläche 36 her eingebracht. Die Sicken 22 und 26 haben somit eine Auswölbung, die etwa entgegengesetzt orientiert zur Auswölbung der mittleren Sicke 24 ist.The two outer beads 22 and 26 of a respective lamella 2 are introduced from a first side face 34 and the middle bead 24 from the other side face 36 . The beads 22 and 26 thus have a bulge which is oriented approximately in the opposite direction to the bulge of the central bead 24 .

Die Ausgestaltung einer jeweiligen Sicke 22 bis 26 wird anhand der mittleren Sicke 24 in Figur 2 näher erläutert. Eine jeweilige Sicke 24 hat einen Sickengrund 38. Von diesem aus erstrecken sich etwa V-förmig zueinander die Längsflanken 30b und 30c, wobei ihr Abstand sich mit zunehmender Entfernung vom Sickengrund 38 vergrößert. Neben den Längsflanken 30b und 30c hat die Sicke 24 zwei Querflanken 40a und 40b, die sich ebenfalls ausgehend vom Sickengrund 38 V-förmig zueinander erstrecken, wobei ihr Abstand mit zunehmender Entfernung vom Sickengrund 38 größer wird. Die benachbarten Längs- und Querflanken 30b, 30c, 40a, 40b sind jeweils über eine gekrümmte Flanke 42 miteinander verbunden. Die Sicken 22 und 26 sind somit jeweils etwa schalenförmig ausgestaltet.The design of a respective bead 22 to 26 is shown on the basis of the middle bead 24 in figure 2 explained in more detail. Each bead 24 has a bead base 38. Longitudinal flanks 30b and 30c extend from this in an approximately V-shape relative to one another, with their spacing increasing as the distance from bead base 38 increases. In addition to the longitudinal flanks 30b and 30c, the bead 24 has two transverse flanks 40a and 40b, which also extend in a V-shape towards one another, starting from the bead base 38, with their spacing increasing as the distance from the bead base 38 increases. The adjacent longitudinal and transverse flanks 30b, 30c, 40a, 40b are each connected to one another via a curved flank 42. The beads 22 and 26 are thus each designed approximately in the shape of a bowl.

Die Sicken 22 und 26 einer jeweiligen Lamelle 2 sind im Wesentlichen gleich ausgestaltet und auch gleich bei den jeweiligen Lamellen 2 positioniert. Im Bereich der aneinander anliegenden oder angenäherten Endabschnitte 10a und 10b von benachbarten Lamellen können die Sicken 22 bis 26 der einen Lamelle 2a in die Sicken 22 bis 26 der anderen Lamelle 2b abschnittsweise eintauchen. Eine relative Verschiebung der Lamellen 2a und 2b insbesondere in Durchströmungsrichtung 16 wird somit erschwert, wodurch eine Steifigkeit des Lamellenelements 1 erhöht ist.The beads 22 and 26 of a respective lamella 2 are configured essentially the same and are also positioned in the same way on the respective lamellas 2 . In the area of the abutting or approaching end sections 10a and 10b of adjacent lamellae, the beads 22 to 26 of one lamella 2a can partially dip into the beads 22 to 26 of the other lamella 2b. A relative displacement of the lamellae 2a and 2b, in particular in the direction of flow 16, is thus made more difficult, as a result of which the rigidity of the lamellar element 1 is increased.

Gemäß Figur 3 ist das Lamellenelement 1 vor der Beaufschlagung mit einer Presskraft über seine Verbindungsabschnitte 4 gezeigt. Gemäß Figur 4 sind die Verbindungsabschnitte 4 hierbei jeweils gekrümmt ausgestaltet. Im Querschnitt gesehen erstrecken sie sich hierbei jeweils etwa abschnittsweise umlaufend um einen Kreis.According to figure 3 shows the lamellar element 1 before it is subjected to a pressing force via its connecting sections 4 . According to figure 4 the connecting sections 4 are each configured in a curved manner. Viewed in cross-section, they each extend approximately partially around a circle.

Zur Herstellung des Lamellenelements 1 werden in ein Band, das insbesondere aus Metall, vorzugsweise aus Aluminium oder einer Aluminiumlegierung, besteht, die Sicken 22 bis 26 für jede Lamelle 2 eingebracht. Dies erfolgt beispielsweise durch einen Prägevorgang. Anschließend wird das Band gebogen, womit es dann etwa die Ausgestaltung gemäß der Figuren 3 und 4 aufweist. Durch die Sicken 22 bis 26 in Figur 4 hat das Lamellenelement 1 im Vergleich zu einem Lamellenelement ohne Sicken eine äußerst hohe Steifigkeit. Die Steifigkeit kann weiter erhöht werden, wenn das Lamellenelement 1 von seinen Funktionsseiten 6 und 8, siehe Figur 4, flächig mit einer Presskraft beaufschlagt wird, wodurch die Verbindungsabschnitte plastisch verformt werden und die Gestalt gemäß Figur 2 erreichen. Die in Figur 4 beispielhaft mit einem Pfeil gekennzeichneten Presskräfte 44 und 46 sind etwa quer zur Durchströmungsrichtung 16 gerichtet und weisen aufeinander zu. Vorzugsweise gleichzeitig zur Beaufschlagung des Lamellenelements mit den Presskräften 44 und 46 wird es in Längsrichtung über seine Stirnseiten 48 und 50 gemäß Figur 3 beaufschlagt, um ein Auseinandertriften der Lamellen 2 bei der Kraftbeaufschlagung mit den Presskräften 44 und 46 zu vermeiden. Zusätzlich kann das Lamellenelement 1 über die Stirnseiten 48 und 50 noch gestaucht werden, also in Längsrichtung plastisch umgeformt werden.To produce the lamellar element 1, the beads 22 to 26 for each lamella 2 are introduced into a band which consists in particular of metal, preferably aluminum or an aluminum alloy. This is done, for example, by an embossing process. Then the band is bent, so that it is then about the configuration according to the Figures 3 and 4 having. Through the beads 22 to 26 in figure 4 the lamellar element 1 has an extremely high rigidity in comparison to a lamellar element without beads. The rigidity can be further increased if the lamella element 1 from its functional pages 6 and 8, see figure 4 , flat with a Pressing force is applied, whereby the connecting portions are plastically deformed and according to the shape figure 2 reach. In the figure 4 Pressing forces 44 and 46, marked by an arrow as an example, are directed approximately transversely to the direction of flow 16 and point toward one another. Preferably at the same time as the pressing forces 44 and 46 are applied to the lamellar element, it is stretched in the longitudinal direction via its end faces 48 and 50 according to FIG figure 3 applied in order to avoid drifting apart of the lamellae 2 when the pressing forces 44 and 46 are applied. In addition, the lamellar element 1 can also be compressed via the end faces 48 and 50, ie plastically deformed in the longitudinal direction.

Gemäß Figur 5 ist eine Lamellenelementanordnung 52 dargestellt. Diese hat zumindest ein Lamellenelement 1, das mit Heizelementen 54 bis 58 fest verbunden ist. Im vorliegenden Ausführungsbeispiel weist die Lamellenelementanordnung 52 ein weiteres Lamellenelement 1a auf. Die PTC-Heizelemente 54 bis 58 sind dann über ihre Großflächen mit einer jeweiligen Funktionsseite 6, 8, siehe Figur 1, des Lamellenelements 1 bzw. 1a verbunden. Hierbei wird auf die Großflächen der PTC-Heizelemente und/oder auf die mit diesen zu verbindenden Funktionsseiten 6, 8 der Lamellenelemente 1, 1a Klebstoff aufgebracht und anschließend die zu verbindenden Teile 54 bis 58, 1 und 1a zueinander angeordnet. Überschüssiger Klebstoff kann dann in die Aufnahmeräume 20, von denen in der Figur 5 beispielhaft zwei mit einem Bezugszeichen versehen sind, verdrängt werden.According to figure 5 a lamellar element arrangement 52 is shown. This has at least one lamella element 1 which is firmly connected to heating elements 54 to 58 . In the present exemplary embodiment, the lamellar element arrangement 52 has a further lamellar element 1a. The PTC heating elements 54 to 58 are then over their large areas with a respective functional page 6, 8, see figure 1 , The lamella element 1 or 1a connected. In this case, adhesive is applied to the large areas of the PTC heating elements and/or to the functional sides 6, 8 of the lamellar elements 1, 1a to be connected to them and then the parts 54 to 58, 1 and 1a to be connected are arranged relative to one another. Excess adhesive can then in the receiving spaces 20, of which in the figure 5 by way of example, two are provided with a reference number.

In dem Ausbruch in Figur 6 ist ein Strömungsquerschnitt zwischen den Lamellen 2 erkennbar. Eine Schnittebene des Ausbruchs erstreckt sich etwa in Parallelabstand zur Funktionsseite 6 bzw. 8 des Lamellenelements 1 mittig durch dieses. Hierbei ist erkennbar, dass in einer sich parallel zu den Funktionsseiten 6 und 8 erstreckenden Ebene, die die Lamellen 2 schneidet, ein Abstand zwischen zwei benachbarten Lamellen 2a, 2b im Wesentlichen gleich bleibt, wodurch wiederum der Strömungsquerschnitt zwischen zwei benachbarten Lamellen 2a und 2b im Wesentlichen gleich bleibt. Dies erfolgt dadurch, dass die Sicken 22 bis 26 einer jeweiligen Lamelle im Wesentlichen gleich ausgestaltet und auch im Wesentlichen gleich bzgl. ihrer Lamelle positioniert sind. Diese Ausgestaltung ist für die Erzielung eines niedrigen Differenzdrucks im Betrieb (mit Durchströmung) vorteilhaft.In the outbreak in figure 6 a flow cross-section between the lamellae 2 can be seen. A sectional plane of the breakout extends approximately parallel to the functional side 6 or 8 of the lamellar element 1 through the middle thereof. It can be seen here that in a plane that extends parallel to the functional sides 6 and 8 and intersects the lamellae 2, a distance between two adjacent lamellae 2a, 2b remains essentially the same, which in turn means that the flow cross-section between two adjacent lamellae 2a and 2b is essentially remains the same. This takes place in that the beads 22 to 26 of a respective lamella are configured essentially the same and also essentially are positioned the same with respect to their lamella. This configuration is advantageous for achieving a low differential pressure during operation (with flow).

Gemäß Figur 7 ist beispielhaft ein Werkzeug 60 zum Beaufschlagen des Lamellenelements 1 mit den Presskräften dargestellt. Das Werkzeug 60 hat zwei im Querschnitt gesehen L-förmig ausgestaltete Werkzeugteile 62 und 64. Ein jeweiliges Werkzeugteil 62 und 64 hat einen ersten Schenkel 66 und einen zweiten Schenkel 68. Das Lamellenelement 1 liegt dann zur Kraftbeaufschlagung mit seiner einen Funktionsseite 6 am Schenkel 66 des einen Werkzeugteils 62 und mit seiner anderen Funktionsseite 8 am Schenkel 66 des anderen Werkzeugteils 64 an. Ein jeweiliger Schenkel 66 hat hierbei eine etwa ebene Anlagefläche 70, die derart ausgestaltet ist, dass das Lamellenelement im Wesentlichen mit seiner gesamten Funktionsseite 6 bzw. 8 an diesen Anlageflächen 70 anliegen kann. Des Weiteren liegt das Lamellenelement 1 mit seiner einen Stirnseite 48 am Schenkel 68 des einen Werkzeugteils 62 und mit seiner anderen Stirnseite 50 an dem Schenkel 68 des anderen Werkzeugteils 64 an. Die Schenkel 68 haben hierfür jeweils eine sich etwa senkrecht zur Anlagefläche 70 ihres jeweiligen Werkzeugteils 62 bzw. 64 erstreckende Anlagefläche 72. Die Anlageflächen 72 sind dabei derart ausgestaltet, dass die Stirnseiten 48 und 50 des Lamellenelements 1 großflächig an diesen anliegen können. Die Werkzeugteile 62 und 64 sind dabei derart zueinander beabstandet, dass sie sich während des Umformprozesses des Lamellenelements 1 nicht berühren. Zum Umformen des Lamellenelements 1 werden dann die Werkzeugteile 62 und 64 aufeinander zu bewegt. Somit werden zum Abflachen der Verbindungsabschnitte 4, siehe Figur 1, die Schenkel 66 der Werkzeugteile 62 und 64 relativ zueinander derart verschoben, dass ein Abstand zwischen diesen verringert wird. Gleichzeitig werden die Schenkel 68 relativ zueinander verschoben und zwar derart, dass ein Abstand zwischen diesen verringert wird, um das Lamellenelement 1 zu stauchen. Alternativ ist denkbar, die Schenkel 68 erst im Anschluss an die Relativverschiebung der Schenkel 66 oder vor der Relativverschiebung der Schenkel 66 zu verschieben. Des Weiteren ist alternativ denkbar, dass die Schenkel 68 einen gleichbleibenden Abstand beibehalten, wodurch sie lediglich das Lamellenelement 1 bei der Umformung über die Schenkel 66 abstützen. Im letzteren Fall ist denkbar, dass das Lamellenelement 1 vor der Abstützung über die Schenkel 66 von diesen gestaucht wird.According to figure 7 a tool 60 for applying the pressing forces to the lamellar element 1 is shown as an example. The tool 60 has two tool parts 62 and 64 that are L-shaped when viewed in cross section. Each tool part 62 and 64 has a first leg 66 and a second leg 68. The lamellar element 1 then lies with its one functional side 6 on the leg 66 of the a tool part 62 and with its other functional side 8 on the leg 66 of the other tool part 64. A respective leg 66 has an approximately flat contact surface 70 which is designed in such a way that the lamellar element can rest against these contact surfaces 70 essentially with its entire functional side 6 or 8 . Furthermore, the lamellar element 1 rests with its one end face 48 on the leg 68 of one tool part 62 and with its other end face 50 on the leg 68 of the other tool part 64 . For this purpose, the legs 68 each have a contact surface 72 extending approximately perpendicularly to the contact surface 70 of their respective tool part 62 or 64. The contact surfaces 72 are designed in such a way that the end faces 48 and 50 of the lamellar element 1 can bear against them over a large area. The tool parts 62 and 64 are spaced apart from one another in such a way that they do not touch during the forming process of the lamellar element 1 . In order to shape the lamellar element 1, the tool parts 62 and 64 are then moved towards one another. Thus, to flatten the connecting portions 4, see figure 1 , the legs 66 of the tool parts 62 and 64 are displaced relative to one another such that a distance between them is reduced. At the same time, the legs 68 are displaced relative to one another in such a way that a distance between them is reduced in order to upset the lamellar element 1 . Alternatively, it is conceivable to only move the legs 68 after the relative displacement of the legs 66 or before the relative displacement of the legs 66 . Furthermore, it is alternatively conceivable that the legs 68 maintain a constant spacing, as a result of which they only support the lamellar element 1 during the forming process via the legs 66 . In the latter case, it is conceivable that the lamellar element 1 is compressed by the legs 66 before it is supported.

Um das Lamellenelement 1 auch in Querrichtung abzustützen und/oder zu stauchen, kann das Werkzeug 60 oder die Werkzeugteile 62 und 64 entsprechende Anlageflächen aufweisen.In order to also support and/or compress the lamellar element 1 in the transverse direction, the tool 60 or the tool parts 62 and 64 can have corresponding contact surfaces.

Gemäß Figur 8 und 9 hat das Lamellenelement 1 gemäß einer weiteren Ausführungsform Verbindungsabschnitte 4, die nur abschnittsweise plastisch verformt sind. Hierdurch ist eine Herstellung des Lamellenelements 1 vereinfacht. Entsprechend der vorhergehenden Ausführungsform hat das Lamellenelement 1 Sicken 22, 24 und 26.According to figure 8 and 9 according to a further embodiment, the lamellar element 1 has connecting sections 4 which are only partially plastically deformed. This simplifies production of the lamellar element 1 . According to the previous embodiment, the lamellar element 1 has beads 22, 24 and 26.

Bei den verformten Teilbereichen des Lamellenelements handelt es sich um die Randbereiche 74, 76 eines jeweiligen Verbindungsabschnitts 4, die frei liegend sind. Die Randbereiche 74, 76 sind hierbei flach oder im Wesentlichen flach gedrückt. Die beiden diametralen Randbereiche 74, 76 eines jeweiligen Verbindungsabschnitts 4 sind etwa v-förmig zueinander angeordnet. Der übrige jeweilige Bereich des Verbindungsabschnitts 4, der nicht flach gedrückt ist, weist im Querschnitt eine bogenförmige Form auf.The deformed partial areas of the lamella element are the edge areas 74, 76 of a respective connecting section 4, which are exposed. The edge areas 74, 76 are pressed flat or essentially flat. The two diametrical edge regions 74, 76 of a respective connecting section 4 are arranged in an approximately V-shape with respect to one another. The remaining respective area of the connecting portion 4 which is not flattened has an arcuate shape in cross section.

Gemäß Figur 10 ist ein Werkzeug 78 zur Herstellung des Lamellenelements 1 mit den verformten Randbereichen 74, 76 dargestellt. Das Werkzeug 78 hat einen Werkzeugkörper 80 mit zwei Werkzeugschalen 82 und 84, die zusammen eine oktagonartige Öffnung 86 begrenzen. Die Öffnung 86 weist vier Kanten 88 bis 94 auf, über die das Lamellenelement 1 plastisch umgeformt wird. Die symmetrisch angeordneten Kanten 88 bis 94 liegen jeweils in einem Eckbereich der Öffnung 86. Wird das Lamellenelement 1 durch die Öffnung 86 geführt, so werden die Kanten des Lamellenelements 1 und somit die Randbereiche 74 und 76 der Verbindungsabschnitte 4 durch die Kanten 88 bis 94 plastisch verformt. Die anderen Bereiche des Lamellenelements 1 sind beim Hindurchführen von einer Wandung der Öffnung 86 beabstandet, womit zwischen dem Lamellenelement 1 und der Wandung Freiräume 96 bis 102 gebildet sind.According to figure 10 a tool 78 for producing the lamellar element 1 with the deformed edge regions 74, 76 is shown. The tool 78 has a tool body 80 with two tool shells 82 and 84 which together define an octagonal opening 86 . The opening 86 has four edges 88 to 94, via which the lamellar element 1 is plastically deformed. The symmetrically arranged edges 88 to 94 are each in a corner area of the opening 86. If the lamellar element 1 is guided through the opening 86, the edges of the lamellar element 1 and thus the edge areas 74 and 76 of the connecting sections 4 become plastic through the edges 88 to 94 deformed. The other areas of the lamellar element 1 are spaced apart from a wall of the opening 86 when passing through, with the result that free spaces 96 to 102 are formed between the lamellar element 1 and the wall.

Alternativ zu den Kanten 88 bis 94 ist denkbar, dass die Öffnung 86 Keilflächen aufweist, die sich in Längsrichtung gesehen - gemäß Figur 10 senkrecht zur Zeichenebene - erstrecken. Die Randbereiche 74 und 76 würden somit beim Hindurchführen des Lamellenelements 1 durch die Öffnung 86 stetig verformt werden. Die Keilflächen führen dazu, dass sich die Öffnung 86 in Längsrichtung verjüngt, also in Durchführungsrichtung des Lamellenelements 1.As an alternative to the edges 88 to 94, it is conceivable that the opening 86 has wedge surfaces which, as seen in the longitudinal direction - according to figure 10 perpendicular to the plane of the drawing - extend. The edge regions 74 and 76 would thus be continuously deformed when the lamellar element 1 is guided through the opening 86 . The wedge surfaces lead to the opening 86 narrowing in the longitudinal direction, i.e. in the direction of passage of the lamellar element 1.

Eine Variante sieht vor, das als mäanderförmig gebogenes Band ausgebildet ist, wobei in Richtung des Bands gesehen an diesem wechselweise ein Verbindungsabschnitt 4 zum Verbinden von zwei Lamellen 2 und eine Lamelle 2 ausgebildet sind, dadurch gekennzeichnet, dass das Lamellenelement 1 bei der Herstellung über die Verbindungsabschnitte 4 mit einer Presskraft beaufschlagt ist, und/oder dass Lamellen 2 von zumindest einer Teilmenge der Lamellen 2 zumindest eine Sicke 22, 24, 26 aufweisen.A variant provides that it is designed as a meander-shaped curved strip, with a connecting section 4 for connecting two slats 2 and one slat 2 being formed alternately on this, viewed in the direction of the strip, characterized in that the slat element 1 during production via the Connecting sections 4 is subjected to a pressing force, and/or that slats 2 of at least a subset of the slats 2 have at least one bead 22, 24, 26.

Das Lamellenelement der Variante kann bei der Herstellung in Längsrichtung und/ oder Querrichtung mit einer weiteren Kraft beaufschlagt sein.The lamellar element of the variant can be subjected to a further force during production in the longitudinal direction and/or transverse direction.

Die Verbindungsabschnitte 4 der Variante können durch die Beaufschlagung mit der über die Verbindungsabschnitte 4 beaufschlagten Presskraft umgeformt sein.The connection sections 4 of the variant can be deformed by the application of the pressing force applied via the connection sections 4 .

Die Verbindungsabschnitte 4 der Variante können durch die Beaufschlagung mit der über die Verbindungsabschnitte 4 beaufschlagten Presskraft von einer gekrümmten Form in eine zumindest abschnittsweise ebene Form umgeformt sein.The connection sections 4 of the variant can be deformed from a curved shape into an at least partially flat shape by the application of the pressing force applied via the connection sections 4 .

Im Übergangsbereich 18a, 18b der Variante kann zwischen einem jeweiligen Verbindungsabschnitt und der mit diesem verbundenen Lamelle 2a, 2b ein Radius vorgesehen sein.In the transition region 18a, 18b of the variant, a radius can be provided between a respective connecting section and the lamella 2a, 2b connected to it.

Eine jeweilige Lamelle 2 der Variante kann zusammen mit ihren beiden Verbindungsabschnitten 4 in einer Durchströmungsrichtung 16 des Lamellenelements 1 gesehen etwa eine Z-Form ausbilden.A respective lamella 2 of the variant, together with its two connecting sections 4 , can form approximately a Z-shape, viewed in a flow direction 16 of the lamella element 1 .

Zumindest in die Lamellen 2 der Teilmenge der Variante können jeweils von ihrer einen Seitenfläche 36 her eine erste Sicke 24 und von ihrer anderen Seitenfläche 34 her eine zweite Sicke 22 oder zwei zweite Sicken 22, 26 eingebracht sein.At least in the lamellae 2 of the subset of the variant, a first bead 24 can be introduced from their one side surface 36 and a second bead 22 or two second beads 22, 26 can be introduced from their other side surface 34.

Eine jeweilige Sicke 22 bis 26 der Variante kann sich etwa parallel zu einer Längskante 28 ihrer Lamelle 2 erstrecken.A respective bead 22 to 26 of the variant can extend approximately parallel to a longitudinal edge 28 of its lamella 2 .

Zumindest in die Lamellen 2 der Teilmenge der Variante können zwei seitliche Sicken 22, 26 von einer Seitenfläche 34 her und eine mittlere Sicke 24 von der anderen Seitenfläche 36 der eingebracht sein.At least in the slats 2 of the subset of the variant, two lateral beads 22, 26 can be introduced from one side surface 34 and a central bead 24 from the other side surface 36.

Die Sicken 22 bis 26 der Variante können derart ausgebildet sein, dass jeweils zwischen zwei benachbarten Lamellen 2a, 2b ein Strömungsquerschnitt in Durchströmungsrichtung gesehen im Wesentlich gleich bleibt.The beads 22 to 26 of the variant can be designed in such a way that a flow cross section between two adjacent lamellae 2a, 2b, viewed in the flow direction, remains essentially the same.

Die Sicke oder die Sicken der Variante können bei jeder Lamelle 2 etwa an einer gleichen Position eingebracht sein.The bead or beadings of the variant can be introduced at approximately the same position in each lamella 2 .

Zumindest eine Mehrzahl von Verbindungsabschnitten 4 oder alle Verbindungsabschnitte 4 der Variante können im Wesentlichen gleichzeitig mit der Presskraft beaufschlagt sein.At least a plurality of connecting sections 4 or all connecting sections 4 of the variant can be subjected to the pressing force essentially simultaneously.

Eine Variante des Verfahrens zur Herstellung eines Lamellenelements 1, insbesondere gemäß der Variante des Lamellenelements hat die Schritte:

  • Umformen eines Bands zu dem Lamellenelement 1 derart, dass in Richtung des Bands gesehen wechselweise ein Verbindungsabschnitt 4 und eine Lamelle 2 ausgebildet sind, wobei insbesondere ein jeweiliger Verbindungsabschnitt 4 zumindest abschnittsweise nach außen gekrümmt ist, und
  • Beaufschlagen des Lamellenelements 1 über die Verbindungsabschnitte 4 von beiden Seiten 6, 8 des Lamellenelements 1 her mit einer äußeren Presskraft oder Beaufschlagen der Verbindungsabschnitte 4 nacheinander von einer oder von beiden Seiten 6, 8 des Lamellenelements 1 her mit der äußeren Presskraft.
A variant of the method for producing a lamellar element 1, in particular according to the variant of the lamellar element, has the steps:
  • Reshaping of a band to form the lamellar element 1 in such a way that, seen in the direction of the band, a connecting section 4 and a lamella 2 are formed alternately, with in particular a respective connecting section 4 being curved outwards at least in sections, and
  • Applying an external pressing force to the lamellar element 1 via the connecting sections 4 from both sides 6, 8 of the lamellar element 1 or applying the external pressing force to the connecting sections 4 in succession from one or both sides 6, 8 of the lamellar element 1.

Vor oder während dem Umformen des Bands werden Sicken 22, 24, 26 in das Band eingebracht.Beads 22, 24, 26 are introduced into the band before or during the forming of the band.

Vor dem Beaufschlagen des Lamellenelements 1 mit der Presskraft und/oder etwa gleichzeitig zum Beaufschlagen des Lamellenelements 1 mit der Presskraft, kann das Lamellenelement 1 in Längsrichtung und/oder Querrichtung mit einer Kraft beaufschlagt sein.Before the pressing force is applied to the lamellar element 1 and/or approximately at the same time as the pressing force is applied to the lamellar element 1, the lamellar element 1 can be subjected to a force in the longitudinal direction and/or transverse direction.

Offenbart ist ein Lamellenelement, das Lamellen aufweist, die einstückig über Verbindungsabschnitte miteinander verbunden sind. Zur Erhöhung einer Steifigkeit wird das Lamellenelement von seinen Verbindungsabschnitten her mit einer Presskraft bei der Herstellung beaufschlagt, womit zumindest Teilbereiche der Verbindungsabschnitte plastisch verformt werden. Zusätzlich sind in einigen oder allen Lamellen Sicken eingebracht.A lamellar element is disclosed which has lamellae which are connected to one another in one piece via connecting sections. To increase rigidity, the lamellar element is subjected to a pressing force from its connecting sections during manufacture, with the result that at least partial areas of the connecting sections are plastically deformed. In addition, beading has been incorporated into some or all of the slats.

BezugszeichenlisteReference List

1, 1a1, 1a
Lamellenelementlamella element
2, 2a, 2b2, 2a, 2b
Lamellelamella
4, 4a, 4b4, 4a, 4b
Verbindungsabschnittconnection section
66
Funktionsseitefunction page
88th
Funktionsseitefunction page
10a, 10b10a, 10b
Endabschnittend section
1212
Außenflächeouter surface
1414
Flachabschnittflat section
1616
Durchströmungsrichtungflow direction
18a, 18b18a, 18b
gekrümmter Abschnittcurved section
2020
Aufnahmeraumrecording room
2222
Sickebead
2424
Sickebead
2626
Sickebead
2828
Längskantelong edge
30a, 30b, 30c, 30d30a, 30b, 30c, 30d
Längsflankenlongitudinal flanks
3232
Längskantelong edge
3434
Seitenflächeside face
3636
Seitenflächeside face
3838
Sickengrundbead base
40a, 40b40a, 40b
Querflankecross flank
4242
gekrümmte Flankecurved flank
4444
Presskraftpressing force
4646
Presskraftpressing force
4848
Stirnseiteface
5050
Stirnseiteface
5252
LamellenelementanordnungLamellar element arrangement
5454
Heizelementheating element
5656
Heizelementheating element
5858
Heizelementheating element
6060
WerkzeugTool
6262
Werkzeugteiltool part
6464
Werkzeugteiltool part
6666
Schenkelleg
6868
Schenkelleg
7070
Anlageflächecontact surface
7272
Anlageflächecontact surface
7474
Randbereichedge area
7676
Randbereichedge area
7878
WerkzeugTool
8080
Werkzeugkörpertool body
8282
Werkzeugschaletool tray
8484
Werkzeugschaletool tray
8686
Öffnungopening
8888
Kanteedge
9090
Kanteedge
9292
Kanteedge
9494
Kanteedge
9696
Freiraumfree space
9898
Freiraumfree space
100100
Freiraumfree space
102102
Freiraumfree space

Claims (8)

  1. Lamella element which is formed as a meandering-shaped curved strip, wherein viewed in the direction of the strip, a connecting portion (4) for connecting two lamellas (2) and a lamella (2) are formed alternatingly on said strip, wherein lamellas (2) of at least a partial quantity of the lamellas (2) have at least one bead (22, 24, 26) for increasing the rigidity of the lamella element (1), characterised in that in the production, a pressing force (44, 46) is applied to the lamella element (1) across at least a partial quantity of the connecting portions (4), as a result of which in each case one partial region of the connecting portions (4) to which pressing force is applied is plastically transformed, wherein the partial region consists of both edge regions (74, 76) of a respective connecting portion (4) to which pressing force is applied.
  2. Lamella element according to claim 1, wherein a respective connecting portion (4) to which pressing force is applied is arcuate in shape between its edge portions (74, 76), viewed in cross-section.
  3. Lamella element according to any of claims 1 to 2, wherein a respective transformed edge region (74, 76) is flattened.
  4. Lamella element according to any of the preceding claims, wherein during the production a further force is applied thereto in longitudinal direction and/or transverse direction at the same time as the pressing force.
  5. Lamella element according to any of the preceding claims, wherein a radius is provided in the transition region (18a, 18b) between a respective connecting portion (4) and the lamella (2a, 2b) connected thereto.
  6. Lamella element according to any of the preceding claims, wherein the beads (22, 24, 26) are designed such that a flow cross-section, viewed in throughflow direction, in each case between two adjacent lamellas (2a, 2b) remains substantially the same.
  7. Method for producing a lamella element (1) having the steps:
    - transforming a strip to form the lamella element (1) such that, viewed in the direction of the strip, a connecting portion (4) and a lamella (2) are formed alternatingly, wherein a respective connecting portion (4) is curved at least in portions to the outside,
    - characterised in that an external pressing force (44, 46) is applied to the lamella element (1) via the connecting portions (4) from both sides (6, 8) of the lamella element (1), or that the external pressing force (44, 46) is applied to the connecting portions (4) one after another from one or from both sides (6, 8) of the lamella element (1), wherein in each case both edge regions (74, 76) of the connecting portion (4) are shaped plastically,
    and in that prior to or during the shaping of the strip, beads (22, 24, 26) are introduced into the strip for increasing the rigidity of the lamella element (1).
  8. Method according to claim 7, wherein before the pressing force (44, 46) is applied to the lamella element (1), and/or approximately at the same time as the pressing force (44, 46) is applied to the lamella element (1), a force is applied to the lamella element (1) in longitudinal direction and/or transverse direction.
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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015111571A1 (en) 2015-07-16 2017-01-19 Dbk David + Baader Gmbh Method of manufacturing a corrugated fin element, corrugated fin element and heating coil
DE102016110023A1 (en) * 2015-11-13 2017-05-18 Dbk David + Baader Gmbh Heating unit and tumble dryer
DE102016210159A1 (en) 2016-06-08 2017-12-14 Mahle International Gmbh Ribbed element for a heat exchanger
FR3092391B1 (en) * 2019-02-05 2021-01-15 Faurecia Systemes Dechappement Finned plate, manufacturing process, heat exchanger equipped with such a plate, exhaust line

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09155487A (en) * 1995-12-11 1997-06-17 Denso Corp Method for molding corrugated fin for heat exchanger
JPH09280754A (en) * 1996-04-16 1997-10-31 Showa Alum Corp Heat exchanger
DE112011100691T5 (en) * 2010-02-25 2013-01-17 Komatsu Ltd. Corrugated fin and heat exchanger comprising a corrugated fin

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2329789A (en) * 1939-11-16 1943-09-21 Mccord Radiator & Mfg Co Apparatus for making heatexchange elements
GB1301665A (en) * 1969-05-09 1973-01-04
GB1535781A (en) * 1976-04-08 1978-12-13 Covrad Ltd Corrugation-forming machines
JP2544484B2 (en) * 1989-07-13 1996-10-16 三菱重工業株式会社 Needle fin manufacturing method
ES2205427T3 (en) * 1997-08-19 2004-05-01 Gruter Elektroapparate Ag EXTRUDER CANNON WITH A HEAT EXCHANGER.
SI1327834T1 (en) 2002-01-15 2005-02-28 David + Baader Dbk Spezialfabrik Elektrischer Apparate Und Radiating element for a heating apparatus
FR2901658B1 (en) 2006-05-24 2013-05-17 Valeo Systemes Thermiques METALLIC ELEMENT DISSIPATING THERMAL ENERGY CROSSED BY AIR FLOW AND ELECTRICAL CURRENT
EP1918668B1 (en) * 2006-10-27 2010-06-02 Behr GmbH & Co. KG Device for absorbing a fluid via capillary forces and method for manufacturing the device
DE102008003975A1 (en) * 2008-01-11 2009-07-16 Microhellix Systems Gmbh Heat exchanger fins module, heat exchanger and electric heating module
DE202008016603U1 (en) * 2008-12-15 2010-04-29 Autokühler GmbH & Co. KG Corrugated rib for heat exchanger
DE102009057749A1 (en) * 2009-12-10 2011-06-16 Dbk David + Baader Gmbh Radiator element for heater, has multiple radiator profile segments with two parallel shanks, where middle part forming radiator surface extends between shanks
DE102010049637A1 (en) * 2010-10-28 2012-05-03 Benteler Automobiltechnik Gmbh Heat exchanger e.g. tube bundle heat exchanger for use in motor vehicle, has rectangular-shaped heat exchange tube into which slanting metal sheet comprising legs with bulges is inserted

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09155487A (en) * 1995-12-11 1997-06-17 Denso Corp Method for molding corrugated fin for heat exchanger
JPH09280754A (en) * 1996-04-16 1997-10-31 Showa Alum Corp Heat exchanger
DE112011100691T5 (en) * 2010-02-25 2013-01-17 Komatsu Ltd. Corrugated fin and heat exchanger comprising a corrugated fin

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