EP1213556B1 - Echangeur de chaleur à tubes plats avec extrémités déformées - Google Patents

Echangeur de chaleur à tubes plats avec extrémités déformées Download PDF

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Publication number
EP1213556B1
EP1213556B1 EP01130598A EP01130598A EP1213556B1 EP 1213556 B1 EP1213556 B1 EP 1213556B1 EP 01130598 A EP01130598 A EP 01130598A EP 01130598 A EP01130598 A EP 01130598A EP 1213556 B1 EP1213556 B1 EP 1213556B1
Authority
EP
European Patent Office
Prior art keywords
flat
heat exchanger
tube
flat tubes
tubes
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.)
Expired - Lifetime
Application number
EP01130598A
Other languages
German (de)
English (en)
Other versions
EP1213556A1 (fr
Inventor
Ulrich Salzer
Karl-Heinz Staffa
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
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 Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP1213556A1 publication Critical patent/EP1213556A1/fr
Application granted granted Critical
Publication of EP1213556B1 publication Critical patent/EP1213556B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F28D1/04—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 tubular conduits
    • F28D1/053—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 tubular conduits the conduits being straight
    • F28D1/0535—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 tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05383—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits
    • 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
    • F28D1/04—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 tubular conduits
    • F28D1/053—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 tubular conduits the conduits being straight
    • F28D1/0535—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 tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • 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
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/025—Tubular elements of cross-section which is non-circular with variable shape, e.g. with modified tube ends, with different geometrical features
    • 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

Definitions

  • the invention relates to a heat exchanger constructed from flat tubes, in which the flat tubes on at least one, in a connection space forming Component, e.g. a distributor and / or manifold, opening end portion are transformed.
  • Component e.g. a distributor and / or manifold, opening end portion
  • connection space-forming component With larger flat tube width is thus a larger inner diameter for this Required component, so that its realization a greater wall thickness is required if the bursting strength is to remain the same size.
  • Using of pipes as connecting space forming components also occurs the Difficulty that with increasing flat tube width and thus growing Diameter of the connecting space forming tubes whose dead volume increases.
  • the width of the connection space-forming component is at these conventional heat exchangers to choose larger than that of the flat tubes.
  • Patent EP 0 565 813 B1 describes a heat exchanger which composed of a plurality of tubes with preferably oval cross-section is the end in triangular openings of a bottom plate of a Used collecting tank and for this purpose at its Rohrendabêt in a triangle shape are transformed. After inserting the triangular pipe end sections in the triangular openings of the bottom plate are the Tube ends widened to the tubes at the respective bottom plate of two Set collecting tanks arranged on both sides.
  • a heat exchanger is disclosed, the of several, spaced superimposed, U-shaped bent Flat tubes is constructed.
  • the two legs of the U-shaped Flat tubes with respect to their connection area twisted by 90 °, so they both lie in a common transverse plane.
  • One free end of the flat tubes is to a distribution channel and the other free end to one Collector channel connected, with distribution and collection channel on the same Heat exchanger side are arranged and introduced via the distribution channel Heat transfer medium U-shaped parallel through the individual flat tubes flows to the collecting channel.
  • US Pat. No. 3,416,600 discloses a serpentine type heat exchanger discloses in which a stack of serpentine curved flat tubes is provided is, which are twisted in their end sections by 90 °. With these twisted End sections are the flat tubes inserted into associated manifolds, the this with circumferentially introduced, extending in the tube longitudinal direction and are provided spaced apart longitudinal slots. In addition, you can the flat tubes are twisted in a central area by 180 °.
  • FR 2 712 966 A1 is a flat tube heat exchanger described, the flat tubes in their in a connection space-forming component opening end portion on one opposite its subsequent section smaller transverse extent bent or unequal by an angle ⁇ 90 ° twisted.
  • the invention is the technical problem of providing a flat tube heat exchanger based on the type mentioned, a comparatively has low dead volume in the connection space, given a wall thickness the connection space forming component high bursting security has, given a flat tube width with a comparatively small overall depth manufacture and, if necessary, in particular as a condenser for an air conditioner is usable.
  • the invention solves this problem by providing a flat tube heat exchanger with the features of claim 1.
  • this heat exchanger are the flat tubes in their in the connection space forming component opening end portion on one opposite her subsequent section lower transverse extent twisted and / or bent. You can do that Passage cross-section also in the formed end portion substantially constant hold.
  • the smaller transverse extent of the twisted or bent Flachrohrendabitess compared to the subsequent flat pipe section makes it possible to make the terminal space forming member, e.g. a collection or Distributor tube to realize with a depth that is only slightly larger than the reduced transverse extension of the flat tube end section needs to be and This may be smaller than the depth of the flat tubes or at least not it needs to be bigger than the same.
  • Both end sections can each Flat tube to be formed in the manner described, while the flat tubes in the intermediate section e.g. straight with their opposite the end sections larger transverse extent can extend, which then the depth the flat tubes and thus possibly also determines the entire heat exchanger.
  • the achievable low installation depth of the connecting space-forming components for a given flat tube width has the further advantage that selbige to Achieving a given bursting pressure with relatively low wall thickness manufacture and have only a relatively small dead volume.
  • the flow-through heat exchanger volume at a given Heat transfer performance comparatively low, which at Requires a reduction in the volume of the heat transfer fluid flowing through allowed compared to conventional flat tube heat exchangers.
  • the Tord ist occurs during Heat exchanger according to claim 1 especially at an angle not equal to 90 °, so that the flat tube mouths are correspondingly oblique to this direction and thereby claim less installation length in this direction.
  • the Torsion angle can be adjusted to the particular application. As the torsional angle increases, the depth decreases, i. Width, of the Inserting the flat tube ends required area of the connecting space forming Component, while at the same time each Flachrohrendabites with a larger axial extent opens into the component.
  • a or a plurality of partitions provided in the connection space-forming component the divide the terminal compartment into several subspaces.
  • This measure can be used to the guided through the flat tubes refrigerant under redirection in a respective side terminal space forming member sequentially through successive sections of the flat tube stack.
  • suitable for oblique Tordtechnik the Flachrohrendabête is also the respective Partition wall with the corresponding skew angle in the connecting space forming Component arranged.
  • the flat tubes about its longitudinal central axis or about a longitudinal axis parallel thereto twisted.
  • the twisted Flat tube end sections with alternating lateral displacement in the connecting space forming Open part so that the distance between the flat tubes in the non-twisted middle region even at a torsion angle of 90 ° less can be selected as the flat tube width, without the need for the flat tubes must be arranged laterally offset in their central areas, what would counteract a small depth.
  • the present invention further includes a flat tube heat exchanger with flat tubes, at least at one, in a connection space forming Component forming end portion are formed, wherein the Flat tubes in their opening into the connecting space-forming component end portion on a relation to their subsequent section lower transverse extent bent or twisted by an angle ⁇ not equal to 90 °, wherein one or more partitions in the connection space-forming component in one the angle ⁇ corresponding angle are arranged to the longitudinal axis, which divide the terminal space into several subspaces, in each of which a associated group of successive flat tubes opens.
  • the flat tubes can in her opening into the terminal compartment forming member end portion centered around its longitudinal center axis or offset parallel to it Longitudinal axis be twisted off-center.
  • the Width is greater than the flat tube width.
  • the flat tubes can be made of extruded, before bending or twisting preferably solder- and flux-plated Be formed pipes.
  • the respective partition may be a recess have and axially from a front end forth in the connection space forming Be used component, wherein the in the connection space forming component protruding flat tube ends engage in the partition wall recess.
  • Fig. 1 in a fragmentary, schematic side view Heat exchanger, for example, as a condenser in a vehicle air conditioning usable. It conventionally includes a tube / rib block, in the usual way from a stack of spaced apart Flat tubes 1 and one in the spaces between the flat tubes. 1 introduced corrugated rib structure 2 consists. The tube / rib block is located between two laterally closing side plates 6, of which in the Sectional view of Fig. 1 is shown one.
  • the flat tubes 1 are also in conventionally in its interior with one or more flow channels provided through which the refrigerant passed through an air conditioner can be.
  • the flat tubes 1 open into one of each lateral manifold or manifold 3 formed terminal space, of which one acts as a distribution channel and the other as a collecting channel.
  • the above an inlet led into the manifold tube flow medium is from there fed in parallel in the flat tubes 1 and traverses them to the opposite Collection tube 3, which, for example, that in Fig. 1 to be recognized Can be round tube.
  • the heat exchanger can be another, through the provided with the corrugated fin structure 2 spaces between the flat tubes 1 passed through flow medium in heat transfer connection with the flowing through the flat tubes 1 flow medium to be brought.
  • connection pipes 3 Partitions 16 provided to the formed by the entire connecting pipe 3 Connection space in several, in the direction of the pipe axis 4 consecutive Subdivisions 17a, 17b to divide, as shown in Fig. 2.
  • the partition wall 16 is under a diagonal angle ⁇ of the twisted flat tube ends 1c corresponding angle oblique to the pipe axis 4 in the space arranged between two adjacent pipe ends 1c.
  • Such Division of the respective connection space in a plurality of subspaces 17a, 17b particularly favorable for condensers, to remove the refrigerant from a subspace, e.g.
  • the subspace 17a to feed into the flat tubes opening into it, in the opposite connection pipe into the one with the other compartment 17b deflected connected flat tubes and through the latter into this other Subspace 17b to conduct. If necessary, using multiple Partitions this flow deflection in the connecting pipes as often as desired to be repeated. In this way, the refrigerant can meander through the tube / rib block.
  • the one or more pieces and with curved or even, the flat tube ends be made receiving bottom can.
  • the required pipe openings can be milled, punched, laser-cut or introduced by hydroforming and with or without Translations be realized.
  • the flat tubes, which are specially slices of a Heat exchangers may be disc-type, for example, in one piece by extruding or by welding several pipe parts together or by forming and then welding a blank produced.
  • the flat tubes in their area between the twisted and / or bent end sections also have a curved course.
  • the flat tubes only at one of its two end sections can be twisted and / or bent and with the other End portion then not transformed into a smaller transverse extent in a associated connection space-forming component open.
  • the twisting Bending the Flachrohrendabitese can each be made so that the Passage cross section of the flat tubes also in this area substantially keep constant, which is preferred for most applications.
  • the longitudinal center Tordtechnik can Flachrohrendabête also off-center, i. one to its longitudinal central axis parallel offset axis, be twisted. Especially with right-angled twisting can then if necessary, the manifold and the manifold opposite be laterally offset from the intermediate tube / rib block, if the flat tubes are arranged successively such that their eccentrically twisted end portions all on one side of the median longitudinal plane lie the tube / rib block. This may be for specific installation situations be beneficial.
  • the flat tube ends may be arranged that their end sections alternately on one or the other Side of this longitudinal median plane of the tube / rib block. Suitable for that Are then in the manifold or the manifold two parallel rows
  • the longitudinal slots of a number with lateral offset between the longitudinal slots of the other row lie. Since, due to the lateral displacement, the longitudinal slots of one row extend axially beyond the height of adjacent longitudinal slots of the other row can, the flat tubes can be even at right-angled end-side Place the twisting at a small distance in the tube / rib block. In the special case of right-angled twisting, this distance is downwards limited by half the width of the flat tubes, making it smaller in particular than the flat tube width can be. Accordingly, a small Choose height for the corrugated fins, what their heat transfer efficiency improved. This is especially true for applications in which the width the flat tubes is less than that of the corrugated fins.
  • FIG. 3 shows a detail of a longitudinal sectional view through a tube / rib block, as usable for the heat exchangers described above is.
  • Characteristic of this tube / rib block that the width W of Corrugated ribs 40 is greater than the width Q of the multi-chamber tubes realized Flat tubes 41. This provides a fin overhang, the the efficiency of the corrugated fins 40 in terms of their heat transfer capability increased and the flat tubes 41 against damage from the outside protects.
  • the ratio Q / W may be, for example, 2/3.
  • the flat tubes can advantageously be made as extruded pipes. It can also be beneficial be the tubes before their end-end twisting or bending with a Lotund To provide flux plating. This facilitates a sealed insertion the flat tube ends in the connecting pipes by means of sealing soldering.

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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)

Claims (5)

  1. Echangeur de chaleur à tubes plats avec :
    des tubes plats (1), qui sont cintrés au moins sur une section finale (1a) débouchant dans un élément de construction (3) formant un espace de raccordement pour avoir un allongement transversal plus faible par rapport à sa section (1b) consécutive ou sont tordus d'un angle α différent de 90°,
    caractérisé en ce que
    une ou plusieurs cloisons de séparation (16) sont prévues dans l'élément de construction (3) formant l'espace de raccordement, qui subdivisent l'espace de raccordement en plusieurs espaces partiels (17a, 17b), les cloisons de séparation (16) étant disposées dans l'espace intermédiaire entre deux extrémités de tuyau (1c) voisines de façon inclinée par rapport à l'axe longitudinal de l'élément de construction (3) formant l'espace de raccordement dans un angle correspondant à l'angle α des sections finales de tube plat (1a) tordues.
  2. Echangeur de chaleur à tubes plats selon la revendication 1, caractérisé en ce qu'à chaque fois un groupe spécifique de tubes plats successifs débouche dans l'un des espaces partiels (17a, 17b).
  3. Echangeur de chaleur à tubes plats selon la revendication 1 ou 2, caractérisé également en ce que les tubes plats sont tordus dans leur section finale débouchant dans l'élément de construction formant l'espace de raccordement de façon centrée autour de leur axe médian longitudinal ou de façon excentrée autour d'un axe longitudinal décalé parallèlement par rapport au premier axe.
  4. Echangeur de chaleur à tubes plats selon l'une quelconque des revendications 1 à 3, caractérisé également en ce que entre des tubes plats (41) voisins sont introduites des nervures ondulées (40), dont la largeur (W) est supérieure à la largeur de tube plat (Q).
  5. Echangeur de chaleur à tubes plats selon l'une quelconque des revendications 1 à 4, caractérisé également en ce que les tubes plats sont formés par des tubes extrudés, de préférence plaqués par brasage et fusion avant le cintrage ou la torsion.
EP01130598A 1996-11-27 1997-11-26 Echangeur de chaleur à tubes plats avec extrémités déformées Expired - Lifetime EP1213556B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19649129A DE19649129A1 (de) 1996-11-27 1996-11-27 Flachrohr-Wärmeübertrager mit umgeformtem Flachrohrendabschnitt
DE19649129 1996-11-27
EP97120669A EP0845647B1 (fr) 1996-11-27 1997-11-26 Echangeur de chaleur à tubes plats avec extrémité de tubes déformée par torsion

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP97120669A Division EP0845647B1 (fr) 1996-11-27 1997-11-26 Echangeur de chaleur à tubes plats avec extrémité de tubes déformée par torsion

Publications (2)

Publication Number Publication Date
EP1213556A1 EP1213556A1 (fr) 2002-06-12
EP1213556B1 true EP1213556B1 (fr) 2004-02-11

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP97120669A Expired - Lifetime EP0845647B1 (fr) 1996-11-27 1997-11-26 Echangeur de chaleur à tubes plats avec extrémité de tubes déformée par torsion
EP01130598A Expired - Lifetime EP1213556B1 (fr) 1996-11-27 1997-11-26 Echangeur de chaleur à tubes plats avec extrémités déformées

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP97120669A Expired - Lifetime EP0845647B1 (fr) 1996-11-27 1997-11-26 Echangeur de chaleur à tubes plats avec extrémité de tubes déformée par torsion

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EP (2) EP0845647B1 (fr)
DE (4) DE19649129A1 (fr)

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EP3137836B1 (fr) * 2014-04-29 2019-06-12 Carrier Corporation Échangeur de chaleur amélioré
CN107504836A (zh) * 2017-09-20 2017-12-22 杭州三花家电热管理系统有限公司 换热器、换热系统及室内采暖系统
CN109990627A (zh) * 2017-12-29 2019-07-09 浙江盾安机械有限公司 一种多层蛇形扁管换热器及其加工工艺
CN110207528A (zh) * 2019-06-25 2019-09-06 珠海格力电器股份有限公司 一种扁管及微通道换热器
DE102019210366A1 (de) * 2019-07-12 2021-01-14 Mahle International Gmbh Wärmeübertrager
CN114483316B (zh) * 2021-12-31 2023-06-06 北京动力机械研究所 一种具有变形协调功能的大温差换热器

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FR2712966B1 (fr) * 1993-11-24 1996-01-19 Valeo Thermique Moteur Sa Echangeur de chaleur à tubes plats, en particulier pour véhicule automobile.
IT1272091B (it) * 1993-12-20 1997-06-11 Borletti Climatizzazione Procedimento per la piegatura di un tubo a sezione trasversale oblunga e scambiatore di calore con tubi a sezione oblunga piegati a u
FR2715216B1 (fr) * 1994-01-20 1996-02-16 Valeo Thermique Moteur Sa Tube d'échangeur de chaleur, procédé pour sa conformation et échangeur de chaleur comprenant de tels tubes.
FR2715217B1 (fr) * 1994-01-20 1996-03-01 Valeo Thermique Moteur Sa Tube d'échangeur de chaleur, en particulier pour véhicule automobile, procédé pour sa conformation et échangeur de chaleur comprenant de tels tubes.

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Publication number Publication date
EP1213556A1 (fr) 2002-06-12
DE59711309D1 (de) 2004-03-18
EP0845647B1 (fr) 2002-07-03
DE19649129A1 (de) 1998-05-28
DE59706228D1 (de) 2002-03-14
EP0845647A1 (fr) 1998-06-03
DE59707641D1 (de) 2002-08-08

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