EP2867602B1 - Flachrohr und wärmeübertrager mit einem solchen flachrohr - Google Patents

Flachrohr und wärmeübertrager mit einem solchen flachrohr Download PDF

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Publication number
EP2867602B1
EP2867602B1 EP13732913.2A EP13732913A EP2867602B1 EP 2867602 B1 EP2867602 B1 EP 2867602B1 EP 13732913 A EP13732913 A EP 13732913A EP 2867602 B1 EP2867602 B1 EP 2867602B1
Authority
EP
European Patent Office
Prior art keywords
side wall
material strip
flat tube
tube
region
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13732913.2A
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German (de)
English (en)
French (fr)
Other versions
EP2867602A1 (de
Inventor
Christoph Kästle
Steffen Marx
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.)
Mahle Behr GmbH and Co KG
Original Assignee
Mahle Behr GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mahle Behr GmbH and Co KG filed Critical Mahle Behr GmbH and Co KG
Publication of EP2867602A1 publication Critical patent/EP2867602A1/de
Application granted granted Critical
Publication of EP2867602B1 publication Critical patent/EP2867602B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
    • F28D1/0391—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits a single plate being bent to form one or more conduits
    • 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
    • F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements

Definitions

  • the invention relates to a flat tube, in particular for a heat exchanger, of a flat strip of material with two opposing first and second side walls, which are interconnected by means of third and fourth side walls.
  • the invention also relates to a heat exchanger with such a flat tube.
  • Flat tubes for heat exchangers are known in many configurations in the prior art.
  • extruded flat tubes with a plurality of webs for the formation of individual fluid channels for capacitors or evaporators are well known.
  • straw tubes are known in which a metal strip is folded by folding, for example, to a single or multi-chamber tube, such as B-tube.
  • These folding tubes are typically first sealed by the soldering process for soldering the entire heat exchanger and have at least one or two fluid chambers, through which a medium can flow.
  • the DE 102006054814 A1 discloses a soldered flat tube for capacitors or evaporators, in which the tube is formed of two half-shells, which overlap on the short sides and are soldered there, wherein in the interior a rib is arranged such that this rib also in the overlapping tube portion is present and there is soldered to the pipe wall.
  • this embodiment presents problems in terms of rather complex manufacturability and in terms of costs caused thereby, since the production of the multi-part tube with inner fin means increased manufacturing costs, both during manufacture and during assembly of at least three parts connected to a pipe become.
  • the DE 102006050319 A1 discloses a flat tube formed from a sheet metal strip, wherein the sheet metal strip is bent such that the closure of the sheet metal strip is arranged on a short side of the tube. Inside the tube, a rib is also arranged, which is received in the region of the connection of the sheet side edges between these side edges.
  • the EP 1243884 A2 discloses a flat tube, which is formed from a metal strip, wherein a central web is formed, which is formed by a hook-like deformation of the edge regions of the metal strip, wherein a corrugated fin is arranged in the interior of the tube.
  • the tube design of the EP 1243884 A2 has the disadvantage that the internal pressure stability is not optimally pronounced, in particular in the central region of the web, and in particular in the area of the solder joint, leaks may occur in applications under higher pressures.
  • the DE 10 2006 035 210 discloses a flat tube formed from a folded sheet of material. On one of the narrow sides of the material strip is double-layered together. An inner rib arranged in the interior of the flat tube abuts against the inner wall of the narrow sides at the end.
  • the object is to provide such a heat exchanger, which has an increased pressure stability, in particular in the region of its flat tubes.
  • An embodiment of the flat tube according to the invention provides a flat tube, in particular for a heat exchanger, of a flat strip of material with two opposing first and second side walls, which are interconnected by third and fourth side walls, wherein the third side wall by two portions of Material strip is formed which are applied to each other in a double-ply, wherein an inner fin is disposed in the interior of the flat tube, and the end against the third side wall and the fourth side wall and between the third side wall and the fourth side wall alternately on the first side wall and the second Sidewall supported.
  • the third side wall has an angled or arcuate contour.
  • the fourth side wall has an angled or arcuate contour.
  • the inner rib is formed at its one end portion arcuate or angular and rests against the third side wall and is formed at its other end portion arcuate or angled and rests against the fourth side wall.
  • the third side wall is formed with an inner portion and an outer portion of the material strip.
  • a bevel is provided in the transition region from the first side wall to the third side wall at the inner portion of the material strip, wherein the outer portion of the material strip is attached to the inner portion of the strip of material and ends in the region of the slope of the inner portion of the material strip.
  • the end of the outer portion of the strip of material conforms to the contour of the inner portion of the strip of material in the area of the slope and terminates substantially flush.
  • the flat tube with a tube width between 9 mm and 60 mm, and / or with a tube height between 1.5 mm and 30 mm, and / or with a wall thickness s of the material strip between 160 .mu.m and 500 .mu.m, and a Wall thickness of the inner fin is formed between 60 and 200 microns.
  • the dimensions of the inner rib before insertion into the strip of material are greater than the inner dimensions of the strip of material, so that the inner rib can be inserted under bias in the strip of material.
  • the dimensions of the inner rib before insertion into the strip of material are smaller than or equal to the inner dimensions of the strip of material, so that the inner rib can be inserted without bias in the strip of material.
  • the FIG. 1 shows a heat exchanger 1, in particular an evaporator, in a perspective view.
  • the evaporator 1 has a tube-fin block 2 with flat tubes 3 and arranged between the flat tubes ribs 4.
  • the flat tubes 3 are fluidly connected at its two opposite ends with the manifolds 5 and 6, wherein the upper header box 5 consists of two chambers 7.8 , wherein the chamber 7 is the inlet-side chamber, which is connected to an inlet connection pipe 9, wherein the chamber 8 is the outlet chamber, which is connected to an outlet connection pipe 10.
  • the lower collection box 6 advantageously has at least one chamber which effects a deflection in the depth.
  • the inlet port is preferably located laterally on the short side of the header tank and preferably on the leeward side of the heat exchanger.
  • the outlet port is preferably at a frontal arranged long side of the header tank and preferably on the windward side of the heat exchanger.
  • FIG. 2 shows a section through the tube block 2 of the FIG. 1 , wherein the flat tubes 3 and the corrugated fins 4 are arranged alternately side by side.
  • the flat tubes 3 are shown in section, so that the fluid flowing through the flat tubes 3, flows quasi perpendicular to the plane through the tubes.
  • the corrugated fins are shown only schematically, wherein the corrugated fins are traversed quasi-parallel to the plane of air.
  • FIG. 3a shows a flat tube 20 in section, wherein the flat tube of two opposing first and second side walls 21, 22 and two opposing third and fourth side walls 23, 24, wherein the third and fourth side walls 23, 24, the first and second side walls 21, 22 connect together.
  • the side 24 connects as a fourth side
  • the third side wall 23 connects the two first and second side walls 21 and 22 in the embodiment on the right side.
  • the flat tube can be recognized as such, which means that the third and fourth side walls 23, 24 are significantly shorter in their extension than the extension of the first and second side walls 21, 22.
  • the first, the second and the fourth side wall 21, 22, 24 each formed a single layer, wherein the third side wall 23 is formed by two portions 25, 26 of the material strip 27 of the flat tube, which adjacent to each other a kind of double wall in form two-ply copy.
  • the third and fourth side walls 23, 24 are designed arcuate. Arched may preferably be semi-circular or otherwise bent mean.
  • the third side wall 23 in this case has an inner wall and an outer wall, wherein the inner wall, starting from the first side wall 21 merges with a step in the arcuate contour, so that the outer side wall rests in the region of this stage with its end.
  • the inner axial length B V is shown by the arrow.
  • the tube width ie the outer extent in the lateral direction, ie B v plus the wall thicknesses of the respective third and fourth side wall 23, 24, is preferably between 9 mm and 60 mm, particularly advantageously between 10 mm and 30 mm.
  • the tube width is referred to as B R.
  • the tube height H is advantageously between 1.5 mm and 30 mm.
  • the wall thickness s of the outer contour is between 160 ⁇ m and 500 ⁇ m, preferably 180 ⁇ m to 250 ⁇ m.
  • the FIG. 3b shows the inner rib, which is provided for insertion into the flat tube 20.
  • the inner rib 30 is formed in a length B U , which is longer than the inner length B V of the flat tube.
  • the wall thickness of the inner fin is preferably in the range of 60 to 200 microns.
  • the number of lands is preferably about 2 to 20.
  • the inner rib 30 rests only on a tube radius 33.
  • the region 34 lies in particular in the overlapping region of the fold and may possibly be set up slightly, so that a gap is created between region 34 and 33.
  • the FIG. 4 shows flat tube 20 with the inner rib 30 in the assembled state.
  • the arcuate region 33 or the arcuate region 34 of the inner rib 30 is located on the arcuate region of the third and fourth side walls 23, 24 of the flat tube 20 inside flat.
  • the sheets 36 abut on the substantially flat inner side of the first and second side surfaces 21, 22 of the flat tube 20 inside.
  • the FIG. 5 shows in an enlarged detail the end portion with the third side wall 23, which is formed double-layered.
  • the inner band edge or the inner portion 26 of the material strip 27 is formed by a step or by an angled portion such that it deviates from this level or this bend from the plane or straight line of the first side wall 21 and merges into the arcuate end portion 28 ,
  • the outer band edge or the outer portion 25 of the material strip 27 is chamfered in the region of its band edge such that in the contact region between the first and the second band edge or in the contact region of the end of the first section with the step of the second section, a chamfering or rounding, so that an adjustment of the slope is found in this area.
  • the adaptation of the end of the tape is carried out with the aid of a shaping roller, so that the end of the tape can be adapted to the step of the band edge or of the first section in order to be able to minimize the delta diameter 37 as well.
  • the area of the delta diameter can be after the Soldering preferably be at least partially filled by solder, so that a substantially smooth transition region is to be found outside the tube.
  • FIG. 6 shows the embodiment of the FIG. 5 again in another illustration, wherein the delta diameter 37 can be seen.
  • the darkened, reinforced lines indicate the solder cladding 38 on the tape as tubing, which is preferably provided on both sides of the strip of material.
  • FIG. 7 shows in a further embodiment, a flat tube 40 which is formed on the third side wall 41 at an angle or angled, while the tube is formed on the fourth side wall 42 with an arcuate course.
  • the region of the third side wall 41 is formed in such a way that it consists of two partial regions 43, 44 which are substantially at an acute angle, the region 43 being the double-walled region which is formed from two sections of the material strip in double-layered form, the end of the strip of material are placed on each other.
  • a first end region 45 and a second end region 46 of the material strip are angled in such a way that the two material strips are aligned parallel to one another.
  • the material strip 45 is angled ⁇ of the first side wall 47 at an angle of about 135 °, the region 48 angled from the second side wall 49 by the angle ⁇ and the region 46 angled from the region 48 in the angle ⁇ , such that the two areas 45 and 46 of the third side wall parallel to each other and double-layered side by side.
  • the end face of the area 45 either comes into contact with the area 48 or keeps a small distance thereto.
  • the inner rib 50 has at its one end an arcuate profile 51, which applies to the arcuate course of the fourth side wall of the flat tube.
  • the inner rib 50 has an angled profile 52, which is formed from two angularly mutually standing regions, wherein a region 53 rests against the region 48 of the flat tube and a region 54 bears against the region 45 of the flat tube. Between the two lateral end regions, the inner rib 50 is arranged in the region of the arches 55 such that it bears against the first or second side wall on the inside.
  • FIGS. 8 and 9 show the two end portions of the flat tube once again in an enlarged view.
  • the region 51 is substantially semicircular, arc-shaped and lays against the second side wall 56. From the semicircular, the inner rib takes a meandering course, with the resulting sheets 55 abutting each other on the first and second side wall opposite.
  • the third side wall which, as described above, is formed angled, wherein in one region of the angle, the side wall is formed in one layer and in another area of the side wall of the angle is double-layered, the inner rib angled applies to these two areas.
  • the FIG. 10 shows an end portion of a flat tube, the alternative to the embodiment of the FIGS. 7, 8 and 9 is formed at an end portion.
  • the region of the third side wall 70 is formed angled, wherein the double-layered design is carried out over both legs of the angled side wall.
  • the side wall 70 in this case has a first leg 71 and second leg 72, which are each formed from a layer 73 and 74 or 75 and 76. Starting from the first side wall 77 of the leg 76 is angled at the angle alpha and the leg 74 of Leg 76 angled away from the angle beta. Starting from the second side wall 78, the leg 73 is at the angle gamma angled whereby the leg 75 is angled away from the leg 73 again by the angle beta.
  • FIG. 11 shows a further embodiment in alternative to FIG. 10 , wherein the third side wall is again formed at least partially double-layered.
  • the leg 91 of the side wall 90 is formed double-layered and the leg 92 at least partially double-layered.
  • the leg 91 is formed by the leg 93 and the leg 94 of the material strip, wherein the leg 92 is formed by the leg 95 and the leg 96 of the material strip.
  • the leg 96 has only about half a length, preferably a partial length of the leg 95, so that the leg 96 only applies to a portion of the leg 95 at this. Furthermore, it can be seen that the rib 97 engages in the region of the leg 95 to the latter, wherein the leg 98 of the rib 97 in the region abuts the leg 95, which releases the reduced length leg 96. The legs 96 and 98 are therefore adjacent to each other on the leg 95.
  • FIG. 12 shows a further embodiment for a design of a side wall of a flat tube, wherein the side wall 100 is again formed double-layered by the legs 101 and 102, wherein the leg 101 is formed by the leg 103 and the leg 104, which is angled parallel to the first side wall 105 double-layered are arranged side by side.
  • the leg 102 is formed by the leg 106 and the leg 107, which are arranged angled relative to the second side wall 108, wherein in this embodiment, the two legs 107 and 108 not lie flat against each other, but have a distance which forms a gap, so that in this gap 109 of the end portion 110 of the rib 111 can engage.
  • FIG. 13 shows a further embodiment alternative to the embodiment of FIG. 12 ,
  • the third side wall 120 is formed by the side wall 121 and the side wall 122.
  • the side wall 121 is analogous to the side wall 101 of FIG. 12 double-layered.
  • the leg 122 of the side wall 120 is formed by the leg 123 and the leg 124, wherein the leg 124 is applied over a part of its extension to the leg 123 and spaced in another part of its extension from the latter by a gap, wherein in the Gap 125 of the legs 126 of the rib 127 extends, so that in this partial region between the leg 124 and the leg 123 of the leg 126 of the rib is arranged and soldered.
  • the FIG. 14 shows a further embodiment of a flat tube 140 in a partial view.
  • the third side wall 141 is formed by two overlapping regions 142, 143, which are each formed as an arcuate region.
  • the region 143 transitions from the straight region of the first side wall 144 with an S-shaped profile 145 into the arcuate region 143, which describes a circular arc.
  • the region 142 is likewise circular-arc-shaped and lies on the outside against the circular arc of the region 143.
  • the arc of the area 142 ends with a bevel, so that the gap 146 between the two areas 142, 143 and 145 formed as low as possible and preferably wedge-shaped with a small angle of less than 30 °.
  • the distance d between the regions is also as small as possible, in particular smaller than the material thickness D.
  • FIG. 15 shows an embodiment of a flat tube 150 in section, wherein the flat tube 150 of two opposing first and second side walls 151, 152 and two opposing third and fourth side walls 153, 154, wherein the third and fourth side walls 153, 154, the first and second Side walls 151, 152 connect together.
  • the side 154 connects as the fourth side
  • the third side wall 153 connects the two first and second side walls 2151 and 152 in the embodiment on the left side.
  • the flat tube 150 can be seen as such, which means that the third and fourth side walls 153, 154 are significantly shorter in their extension than the extent of the first and second side walls 151, 152.
  • the first, the second and the fourth side wall 151, 152, 154 each formed in one layer, wherein the third side wall 153 is formed by two portions 155, 166 of the material strip 157 of the flat tube, which adjacent to each other a kind of double wall in form two-ply copy.
  • the third and fourth side walls 153, 154 are designed arcuate. Arcuate may preferably mean semi-circular or otherwise curved.
  • the third side wall 153 in this case has an inner wall and an outer wall, wherein the inner wall, starting from the first side wall 151 merges with a step in the arcuate contour, so that the outer side wall rests in the region of this stage with its end.
  • the FIG. 15 shows the inner fin 160, which is inserted into the flat tube 150.
  • the shape of the inner rib 160 is such that an arcuate contour is provided at one of the two end portions 164, while at the other end portion 163, the inner rib just ends. Between End regions 163, 164, a meander-shaped contour 165 is provided with webs and bows. This causes the inner fin 160 to abut one of the arcuate contours of the flat tube with its one arcuate contour in the region 164, while the straight region 163 laterally abuts the region 155.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
EP13732913.2A 2012-06-29 2013-06-28 Flachrohr und wärmeübertrager mit einem solchen flachrohr Active EP2867602B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201210211350 DE102012211350A1 (de) 2012-06-29 2012-06-29 Flachrohr und Wärmeübertrager mit einem solchen Flachrohr
PCT/EP2013/063618 WO2014001498A1 (de) 2012-06-29 2013-06-28 Flachrohr und wärmeübertrager mit einem solchen flachrohr

Publications (2)

Publication Number Publication Date
EP2867602A1 EP2867602A1 (de) 2015-05-06
EP2867602B1 true EP2867602B1 (de) 2017-11-15

Family

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Application Number Title Priority Date Filing Date
EP13732913.2A Active EP2867602B1 (de) 2012-06-29 2013-06-28 Flachrohr und wärmeübertrager mit einem solchen flachrohr

Country Status (7)

Country Link
US (1) US10267572B2 (pt)
EP (1) EP2867602B1 (pt)
KR (1) KR20150037948A (pt)
CN (1) CN104583703B (pt)
BR (1) BR112014031231A2 (pt)
DE (2) DE102012211350A1 (pt)
WO (1) WO2014001498A1 (pt)

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DE102005050366A1 (de) * 2004-10-25 2006-04-27 Denso Corp., Kariya Wärmeaustauscher und Verfahren zu seiner Herstellung
US20100051252A1 (en) * 2007-07-11 2010-03-04 Denso Corproation Heat exchanger

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CN104583703A (zh) 2015-04-29
DE112013003181A5 (de) 2015-03-12
US20150107811A1 (en) 2015-04-23
US10267572B2 (en) 2019-04-23
BR112014031231A2 (pt) 2017-06-27
EP2867602A1 (de) 2015-05-06
DE102012211350A1 (de) 2014-01-02
WO2014001498A1 (de) 2014-01-03
KR20150037948A (ko) 2015-04-08

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