Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
  • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F1/00—Tubular elements; Assemblies of tubular elements
  • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
  • F28F1/12—Tubular 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
  • F28F1/126—Tubular 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
  • B21D13/04—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form by rolling
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
  • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
  • B23P15/26—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass heat exchangers or the like
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/4935—Heat exchanger or boiler making

Definitions

• the invention relates to a corrugated fin according to the preamble of claim 1 and a method for their production and a heat exchanger with such a corrugated fin.
• Corrugated fins are extensively known in the art for use in heat exchangers to improve heat transfer.
• Corrugated fins are known, for example, for air-side heat transfer, which are arranged substantially wavy or zigzag-shaped between pipe side surfaces folded back and forth, so that in the Intermediate spaces of the rib can flow through a medium.
• corrugated fins have become known in which adjacent rib surfaces, which are connected to each other by means of a rib bow, are parallel to one another or which are arranged at an acute angle to each other.
• the rib bow can be a continuous arc in the flow direction of the medium may be applied to one of the pipe side surfaces or it may be formed as a staggered arc which is divided and offset at intervals.
• Such corrugated ribs have become known for example from DE 602 03 721 T2.
• the possibility of introducing additional turbulence generating elements into the side faces is limited because the rib rolls would destroy them again when rolling the parallel side faces.
• DE 10 2008 015 064 A1 discloses a corrugated fin with mutually perpendicular rib surfaces which are deformed inwardly by deformations.
• An exemplary embodiment provides a corrugated fin, in particular for a heat exchanger, having a substantially undulating shape, with a plurality of ribbed surfaces, wherein adjacent ribbed surfaces are connected to one another by means of a ribbed arch, such that a space can be traversed between adjacent ribbed surfaces for a medium, wherein the rib faces are perpendicular to a direction of flow for the medium at an angle to each other, wherein a rib face has at least one protrusion protruding from the plane of the rib face, wherein the extension of the protrusion in a direction perpendicular to the air flow direction is smaller than the extent of the Ribbed surface in this direction.
• the bulge in the direction perpendicular to the air flow direction does not protrude from a vertical defined by the end regions of the rib surface.
• the bulge thus does not interfere with a spatial region defined by the rib bow and the space defined perpendicular to the air flow direction or surface area is defined.
• the bulge is spaced from an end region of the rib surface which adjoins a rib bow or advantageously also from both end regions of the rib surface which adjoin a respective rib bend. It is thereby achieved that the bulge does not engage in a spatial region which is defined by the rib bow and the space or surface area defined perpendicular to the air flow direction.
• a plurality of bulges per rib surface are formed and arranged, with the bulges of a rib surface protruding to one side with respect to the plane of the rib surface. This promotes the transfer of heat between the rib and the flowing medium, such as the air,
• a plurality of bulges per rib surface is formed and arranged, wherein a first part of the bulges of a rib surface after a first side and a second part of the bulges after a second side with respect to the plane of Protruding rib surface. This also promotes the transfer of heat between the rib and a flowing medium.
• first part of the bulges are formed spaced from the second part of the bulges » these touch or merge into each other. If the bulges are spaced, surface regions of the rib surface are arranged between bulges, separating the individual bulges from one another. If the bulges overlap or touch each other, either there is no surface area of the rib area or only a border line between individual bulges.
• the bulges prefferably have a round or oblong and / or oval contour.
• bulges with an oblong and / or oval contour have a longitudinal axis which is arranged at an angle to the throughflow direction. It is expedient if the angle is the same for all bulges. This means that the orientation of the bulges in the direction of air flow through at least one rib surface or all rib surfaces is the same. It is particularly advantageous » if the angle for adjacent bulges is different. It can thus be achieved that alternating bulges have different angles. It may be advantageous that every second bulge has the same angle.
• the angle for adjacent bulges is symmetrical relative to a perpendicular to the direction of air considered. This means that, for example, an angle of the first bulge is 45 ° and the angle of the adjacent bulge is 135 °. In total, then the angles of the two bulges together amount to 180 °.
• the bulge is formed as a wave-shaped embossing.
• the wave-shaped embossment extends along the rib surface in the flow direction along.
• the wave-shaped embossing modulates the rib surface perpendicular to the flow direction.
• the arc-shaped embossments form a band which runs parallel to the wave-shaped embossing.
• the bulge depth of the wave-shaped embossings and / or the arcuate embossing over the height of the rib is constant or variable. It is also expedient if, in the region of the trapezoidal stump, the bulge out of the trapezoidal rib surface is smaller than a bulge in the region of the trapezoid tip. It is particularly advantageous if, in the region of the trapezoidal stump, a bulge in the trapezoidal rib surface is larger than a bulge in the region of the trapezoidal tip.
• the bulge height is preferably between 60% and 95% of the rib height H, preferably 80%.
• a counterbore is formed in at least one or in each trough and / or wave peak of the wave-shaped embossing.
• the object with respect to the heat exchanger is achieved with a heat exchanger with fluid channels with side surfaces of the Fiuidkanäle, with space areas between adjacent side surfaces, wherein an above corrugated fin is disposed between adjacent side surfaces, such that it rests by means of opposite rib arches on one of the side surfaces.
• the object with regard to the method is achieved by a method for producing a corrugated rib, in which, starting from a strip bulges are embossed with a set of rollers in the band and then the flat band is formed by means of a set of rollers to a corrugated fin.
• Fig. 1 is a schematic view of a tube with a
• Corrugated rib Fig. 2 is a schematic view of a corrugated fin in section
• Fig. 3 is a schematic view of a corrugated fin in one
• Fig. 4 is a schematic view of a corrugated fin in a
• FIG. 5 is a schematic view of a corrugated rib in section Fig. 5a shows a detail of Fig. 5,
• FIG. 6 is a perspective view of a corrugated fin
• FIG. 7 is a perspective view of a corrugated fin
• FIG. 8 is a perspective view of a corrugated fin
• Fig. 9 is a perspective view of a corrugated fin
• 10 is a perspective view of a corrugated fin
• 1 1 is a perspective view of a corrugated fin
• FIG. 12 is a perspective view of a corrugated fin
• FIG. 13 is a perspective view of a corrugated fin
• FIG. 20 is a view of the corrugated fin of FIG. 19 from above,
• FIG. 21 is a perspective view of another corrugated rib
• Fig. 22 is a view of the corrugated fin of FIG. 21 from above
• Fig. 23 is a section through a corrugated fin according to Fig. 21, and
• Fig. 24 is a view of the corrugated fin on a rib surface.
• Preferred embodiment of the invention 1 shows a tube 1, which is designed as a fluid passage of a heat exchanger, wherein the tube has two wide side surfaces 2, 3 and two narrow side surfaces 4, 5, which lie opposite each other and define an inner space 6, the flow-through for a Medium is suitable.
• a corrugated fin 7 is arranged, which is formed by rib surfaces 8, 9 which are each connected to each other via ribbed arches 10.
• the ribbed arcs 10 are in each case on a side surface 2, 3 of the tube.
• the ribbed arches 10 may preferably be soldered to the side surfaces. Also, they can only be created mechanically.
• the corrugated fin 7 may also be arranged between two tubes, wherein the ribbed arcs 10 are in each case in contact with or connected to a side surface of an adjacent tube.
• FIG. 2 shows a section of a corrugated fin 1 1 in section, wherein the corrugated fin of ribs surfaces 12 and the ribs surfaces 12 connecting ribbed arches 13, wherein the rib surfaces 12 are inclined in a plane perpendicular to the air flow direction.
• the Luftström ungscardi in the corrugated fin 1 1 according to Figure 2 is substantially perpendicular to the sheet plane of Figure 2.
• bulges 14 are provided, which are arched out of the plane of the rib surface 12 out.
• form two adjacent rib surfaces 12 together with the rib bow 13 has an approximately trapezoidal space area, which is available for the flow of a medium.
• the rib bow 13 has a width B
• the height of the rib from a rib bow to an opposite Ribs arc is H
• the height of the bulge in the plane of the side surface is denoted by A
• the distance between two rib arcs corresponds to the value twice L, in the figure 2, only the amount of L is shown as the distance between two opposite rib arches, in the plane perpendicular to the air flow direction.
• FIG 3 shows an arrangement of a rib 20 in the nip 21 of a rolling device with two rollers 22, 23, wherein it can be seen that the ribbed bow 24 is connected to ribbed surfaces 25 which is provided with a bulge 26. Also can be seen that the substantially wave-shaped contour of the rib in a plane perpendicular to the flow direction is already applied by the rolling.
• a further rolling device 30 can be seen, with the rollers 31 and 32, the comb-like interlocking portions 33 and 34, wherein the corrugated fin 35 is received with their rib surfaces 36 in this Roil arrangement.
• the ribs 37 are arranged in the head region of the comb-like elements 33, 34 to form the structure of the corrugated fin, the rib surfaces 36 are arranged with the bulges 38 between the comb-like elements, the bulges are spaced from the comb-like elements 33, 34, so that they are not damaged or destroyed during the formation of the rib.
• FIG. 5 shows a corrugated fin 40 with ribbed arches 41 and ribbed areas 42 and bulges 43 of the ribbed areas 42. It can be seen that the spatial area 44 defined by the width of the ribbed arch 41 is kept free of the bulges 43. The detail of FIG shows this once again in an enlargement.
• the bulge 43 is introduced into the rib surface 42 such that it does not extend beyond the line 45 to engage in the spatial region of the rib bow 41, which is defined by the width 44.
• the bulge 43 is not provided in the lower or upper end region of the rib surface 46, but begins at a distance from the transition region or end region of the rib surface to form the rib bow.
• the area 46 thus serves as a distance to the effect that the bulge 43 does not penetrate into the area marked 44.
• FIG. 6 shows a corrugated fin 50 with rib surfaces 51, which extend substantially along an air flow direction according to arrow P, wherein the rib surfaces 51 are arranged in an angled V-shaped or trapezoidal manner with respect to one another.
• the rib surfaces 51 are connected to each other by ribs 52, such that always two rib surfaces 51 are connected at one end to each other via a rib bow 52, the rib surfaces 51 are usually connected at both ends via a rib bow 52 with a further rib surface 51.
• bulges 53, 54 are provided, which are curved in a substantially circular or spherical section outwardly or inwardly.
• the bulges 53 and 54 are curved in the opposite direction, so that the elements are alternately curved towards each other. It can be seen that the bulge 53 and the bulge 55 of two opposing rib surfaces are arranged such that the bulge is directed in the opposite direction, so that they point away from one another. However, the adjacent bulges 54 and 56, wherein the bulge 56 is not visible in the figure 6, are curved inwardly towards each other, so that they penetrate into the space region which is present between the two adjacent rib surfaces 51. As can be seen in FIG. 6, the bulges 53, 54 and 55, 56 alternate in the longitudinal direction of the rib surfaces, the structure of the embossing in each second rib surface being the same. FIG.
• FIG. 7 shows a further exemplary embodiment of a rib according to the invention, in which the bulges of the rib 60 along a rib surface 61 are always designed alternately, so that the bulges 62 are embossed to one side and the bulges 63 located therebetween are embossed in the opposite direction.
• the bulge 65 is stamped in the same direction as the bulge 62, so that the bulge always faces in the same direction when viewed at the same distance from the leading edge in the direction of air flow. Alternate alignments of the concavities at the same height always point in the same direction and there are no concavities of adjacent rib surfaces which point towards or away from each other, but always point in the same direction.
• FIG. 8 shows bulges that are elongated or oval.
• a series of bulges 73 is introduced, which are curved in the upper region 74 to the outside and in the lower region 75 are curved inwards.
• the bulges are S-shaped, wherein the S cuts in the region of its center line, the plane of the Rippenfiambae and is in the upper area to the outside and in the lower area inward, so that two bulges are generated, which over a straight Interface are interconnected.
• the bulges of Figures 6 and 7 are arranged and formed separately from each other, wherein a flat portion of the rib surface surrounds such a bulged portion and two bulges separated from each other.
• said S-shaped embossments are also planar Region of the rib surface separated from each other, wherein the S-shaped forms can also be defined as two forms with a straight line-like connection.
• FIG. 8 a shows a section through a bulge 74, 75, which is S-shaped relative to the rib surface 71.
• the bulges of adjacent rib surfaces are formed with opposite curvature, which means that the bulges 74, which point away from the adjacent rib surface, find their counterpart in the adjacent rib surface and these bulges there also from the first rib surface face away.
• Adjacent bulges along the extension of the rib surface 71 are aligned parallel to each other and designed with the same orientation of the bulges. This means that all bulges in the upper area to the outside and the effects in the lower area are curved inwards.
• FIG. 9 shows a further exemplary embodiment in which the bulges 81 of the rib surfaces 82 of the rib 80 in adjacent rib surfaces 82, 83 are embossed in different directions, such that bulges embossed in the first rib surface 82 point outwards in the upper region and the embossment is flat in FIG of the adjacent rib surface 81 in the upper region pointing inwards, ie towards the adjacent rib surface 81, while in the first rib surface 81 bulges are arranged in the upper region which point away from the second rib surface 81.
• the adjacent bulges are again configured identically in the same orientation, wherein the bulges are oval and oblong and oriented substantially perpendicular to the air flow.
• Figures 10 to 13 show embodiments of corrugated fins with oval shapes, wherein in Figures 10 and 1 1, the characteristics are arranged at an angle relative to the air flow direction L considered, wherein the angle of the orientation of the forms is the same.
• a corrugated rib 90 with rib surfaces 91, 92 can be seen, wherein forms 93, 94 are provided.
• the protrusions 93 of the side surface 92 is bulged against the direction of the side surface 91 and the bulge 94 is bulged toward the side surface 91.
• the bulge 95 of the side surface 91 is curved in the direction of the side surface 92 out, the adjacent unrecognizable bulge 96 is bulged in the direction that it faces away from the rib surface 92. This means that the bulges that are arranged next from the front edge are all pointing to the left, the second bulges in the direction of air flow, all pointing to the right, the third bulges then pointing to the left again, etc.
• bulges 101 are arranged in the rib 100, which are impressed alternately in relation to the bulges 102 and are embossed at an angle of approximately 45 ° to the air flow direction L.
• the bulges of adjacent rib surfaces are oppositely marked, which means that adjacent forms are stamped on adjacent rib surfaces either towards or away from each other.
• the bulge 103 is thus shaped opposite the bulge 101.
• the expression 104 adjacent to the effect 103 is not shown directed to the expression 102, so that the two forms 102 and 104 are stamped towards each other.
• Figures 12 and 13 show, in contrast to Figures 10 and 1 1 bulges in corrugated fins which are aligned relative to each other at a different angle to the air flow direction.
• first bulges are impressed, which are arranged at an angle of about 45 ° to the air flow direction, wherein adjacent bulges are impressed at an angle of about 135 ° to the air flow direction.
• the direction of the expression corresponds to the directions in Figures 10 and 11, which means that in Figure 12, the rib 1 10 in the side surface 1 1 1 1 has a bulge 1 12, which is oriented away from the rib surface 1 13, wherein the adjacent Auswöibung 114 is embossed on the rib surface 1 13 out.
• the bulge 1 15 of the rib surface 1 13 is stamped on the rib surface 1 1 1 back, the adjacent unrepresented bulge 1 16 of the rib surface 1 13 of the rib surface 1 1 1 is oriented away.
• FIG. 13 shows a corrugated fin 120, in which adjacent bulges 121, 122 are arranged alternately in their curvature direction, wherein adjacent bulges of adjacent rib surfaces are also stamped in the opposite direction.
• FIG. 14 schematically shows a view of a corrugated fin 200 with two adjacent rib surfaces 201, 202.
• bulges 203, 204 can be seen on the two adjacent rib surfaces 201, 202, which are embossed at an angle 205 to one another.
• the bulges 203, 204 be embossed so that the bulges of adjacent rib surfaces are arranged and aligned crosswise.
• the angle 205 may be about 90 °. But it can also be other deviating angles are provided, such as 120 °.
• FIGS 15 to 18 show another embodiment of an inventive corrugated fin 300, in which on opposite
• a wave-shaped embossment 302 is provided, which extends along the rib surface along. Wavy embossment 302 modulates the fin area perpendicular to the air flow direction.
• arc-shaped embossments 303, 304 are provided which surround the undulating embossment at the top and bottom and form a band, which is parallel to the wave-shaped
• the wave-shaped embossment 302 thereby forms bulges 305, 306, which extend transversely to the air flow direction in alternating directions.
• the bulges in the same embossing direction are all 7mm to 20mm, preferably 10mm, arranged so that a related periodicity is generated.
• the medium such as the air
• the bulges point alternately in opposite directions.
• the arcuate embossments 303, 304 above and below the undulating embossment 302 are also performed in this periodicity.
• the bulge depth of the wavy embossments 302 and the arcuate embossments 303, 304 is variable over the height of the rib and not constant, as can be seen in Figure 17.
• the bulge 303, 304 out of the trapezoidal surface of the rib are smaller in the region of the trapezoidal stump 304 than in the region of the trapezoid tip 303, but at most so large that the free passage h is 0.5 mm to 1.5 mm, preferably 0.8 mm.
• the different depth of expression serves to minimize a bypass in the truncated cone area.
• a bulge in the trapezoidal surface is greater in the region of the trapezoidal stump 303 'than in the region of the trapezoidal tip 304', but at most so large that the free passage h is 0.5 mm to 1.5 mm, preferably 0.8 mm.
• the different depth of the expression serves to minimize a bypass in the truncated cone area.
• the bulge height i is preferably between 60% and 95% of the rib height H, preferably 80%.
• Figures 19 and 20 show another embodiment of a corrugated fin 400 according to the invention, in which on opposite rib surfaces 401 a wave-shaped embossment 402 is provided which extends along the rib surface along.
• the wavy embossment 402 modulates the rib area perpendicular to the air flow direction.
• Above and below the wave-shaped embossment 402 arc-shaped embossments 403, 404 are provided, which surround the undulating embossment above and below and form a band which is parallel to the wave-shaped embossing.
• the wave-shaped embossment 302 forms bulges 405, 406, which extend transversely to the air flow direction in alternating directions.
• the medium is wavy in the flow direction, wherein in each wave trough and wave peak of the bulges 405, 406 a counter-recess 407 is formed, which increases the turbulence in the channel and thus the heat transfer.
• Counterbore 407 is coined between 10% and 60% of original bulge 405, 406 in depth, preferably about 40%.
• Figures 21 to 24 show a further embodiment of a corrugated fin 500 according to the invention, in which on opposite rib surfaces 501 an oval embossment 502 is provided, which are arranged along the rib surface spaced.
• the oval embossments 502 modulates the rib area perpendicular to the air flow direction.
• the embossment 502 forms bulges that extend transversely to the air flow direction in alternating directions.
• the oval imprints thus form lobes which project alternately into the trapezoidal-shaped cross-section of the rib 500 and out of the trapezoidal-frustum cross-section of the rib 500.
• the oval imprints form elongated oval bulges whose longitudinal direction at an angle of 0 ° ⁇ a ⁇ 90 °, preferably 35 ° ⁇ a ⁇ 70 ° to Flow direction is inclined.
• the oval imprints have a narrow end portion which has a more circular shape and another narrow end portion which is rather pointed.
• the bulge depth and width along the bulge shape of the embossing is not constant with respect to the surface 501, see FIG. 23.
• the bulge out of the trapezoidal shape is smaller in the area of the trapezoidal stump 503 than in the area of the trapezoidal tip 504, but at maximum so large that the bulge Free passage h 0.5mm to 1.5mm, preferably 0.8mm.
• the different depth of expression serves to minimize a bypass in the truncated cone area.
• the bulge in the trapezoidal shape is smaller in the region of the trapezoidal tip 505 than in the region of the trapezoidal stump 506, but at most so great that the free passage h is 0.5 mm to 1.5 mm, preferably 0.8 mm.
• the different depth of expression serves to minimize a bypass in the truncated cone area.
• the bulge height k is equal to between 60% and 95% of the rib height I, preferably 80%.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• General Engineering & Computer Science (AREA)
• Geometry (AREA)
• Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
• Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
• Moulds For Moulding Plastics Or The Like (AREA)

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• 2012
  • 2012-04-11 DE DE102012205916.4A patent/DE102012205916B4/de not_active Expired - Fee Related
• 2013
  • 2013-04-11 JP JP2015504954A patent/JP2015513064A/ja active Pending
  • 2013-04-11 KR KR1020147031683A patent/KR20150008102A/ko active Search and Examination
  • 2013-04-11 WO PCT/EP2013/057587 patent/WO2013153157A1/de unknown
  • 2013-04-11 CN CN201380019347.4A patent/CN104520664A/zh active Pending
  • 2013-04-11 EP EP13716276.4A patent/EP2850378A1/de not_active Withdrawn
• 2014
  • 2014-10-14 US US14/513,384 patent/US10126073B2/en not_active Expired - Fee Related

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