EP0845648B1 - Echangeur de chaleur à tubes plats, en particulier condenseur de type à serpentin - Google Patents

Echangeur de chaleur à tubes plats, en particulier condenseur de type à serpentin Download PDF

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Publication number
EP0845648B1
EP0845648B1 EP19970120670 EP97120670A EP0845648B1 EP 0845648 B1 EP0845648 B1 EP 0845648B1 EP 19970120670 EP19970120670 EP 19970120670 EP 97120670 A EP97120670 A EP 97120670A EP 0845648 B1 EP0845648 B1 EP 0845648B1
Authority
EP
European Patent Office
Prior art keywords
flat tube
flat
tube
twisted
heat exchanger
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
EP19970120670
Other languages
German (de)
English (en)
Other versions
EP0845648A3 (fr
EP0845648A2 (fr
Inventor
Wolfgang Geiger
Karl-Heinz Dipl.-Ing. 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
Priority claimed from DE19649129A external-priority patent/DE19649129A1/de
Application filed by Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Priority to EP19970120670 priority Critical patent/EP0845648B1/fr
Publication of EP0845648A2 publication Critical patent/EP0845648A2/fr
Publication of EP0845648A3 publication Critical patent/EP0845648A3/fr
Application granted granted Critical
Publication of EP0845648B1 publication Critical patent/EP0845648B1/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
    • F28D1/047—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 bent, e.g. in a serpentine or zig-zag
    • F28D1/0477—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 bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
    • F28D1/0478—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 bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag the conduits having a non-circular cross-section
    • 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

Definitions

  • the invention relates to a flat tube heat exchanger with a flat tube block with one or more Flat tubes with their two end sections in one each terminal compartment component open with at least one end section is twisted section relative to the flat tube.
  • Such heat exchangers can be used, for example, as serpentine-type capacitors use in air conditioning systems of motor vehicles.
  • Such a heat exchanger is in US Pat. No. 3,416,600 of the serpentine type in which a stack is disclosed serpentine curved flat tubes is provided, which in their end sections are twisted by 90 ° so that the longitudinal axis of the twisted end sections with the longitudinal axis of the not twisted flat tube middle section coincides.
  • the flat tubes With these twisted end sections are the flat tubes in associated side collecting tubes inserted, this with circumferential introduced in the pipe longitudinal direction and longitudinal slots arranged in a line are provided.
  • the flat tubes can be in a middle area be twisted by 180 °.
  • To form the serpentine flat tube stack are the individual serpentine curved Flat tubes arranged side by side in the same position.
  • each have an inlet-side flat tube section a flat tube and an outlet-side section of a opposite flat tube opposite. Because in the operation of the heat exchanger these two opposite sections generally at significantly different temperatures lie, there may be undesirable heat transfer effects come between these flat tube sections, the efficiency reduce the heat exchanger.
  • the invention is a technical problem of providing a flat tube heat exchanger of the type mentioned Type based on low dead volume, high efficiency, sufficient burst pressure security and given Manufacture flat tube width comparatively small depth lets and if necessary in particular as a capacitor for a Air conditioning is usable.
  • the invention solves this problem by providing it a flat tube heat exchanger with the features of the claim 1.
  • each Flat tube is eccentrically, eccentrically twisted, i.e. that the longitudinal axis of the twisted end section opposite the Longitudinal axis of the undistorted flat tube middle section in is offset in a lateral direction.
  • connection space components e.g. corresponding manifolds
  • the small depth of the connection space components has the further advantage that the same for Achieving a predetermined burst pressure safety with relative Small wall thickness can be made and only a relative have low dead volume. You can also do that Flow through heat exchanger volume for a given heat exchanger output keep comparatively low, what if necessary a reduction in the volume of the heat transfer fluid flowing through compared to conventional flat tube heat exchangers allowed.
  • the off-center twisting of the flat tube ends creates the Prerequisite for realizing even more compact designs of the Heat exchanger. So with appropriate lateral displacement neighboring, in each case the same terminal compartment component the end of the flat tube end sections the distance of the flat tubes in the non-twisted middle area even with a torsion angle 90 ° smaller than the flat tube width, without the flat tubes in their central areas must be laterally offset. Besides, can by corresponding cross-displacement of the twisted flat tube ends A heat exchanger is implemented in the depth direction of the pipe block be in which the terminal compartment components on one side of the pipe block are arranged.
  • the invention according to claim 2 are at least two adjacent end sections in a row Flat tubes twisted so that their longitudinal axis perpendicular to Plane of the undistorted flat tube middle section, i.e. in a pipe block vertical direction, opposite the longitudinal central axis of the undistorted flat tube middle section is offset.
  • the two adjacent flat tubes are like this in the flat tube block arranged that they are offset from each other in the vertical direction open twisted ends in the same terminal compartment component.
  • the opposing twisting of the two Flat tube ends allow the two adjacent flat tubes despite the end twisting with comparatively little Distance from each other.
  • This enables if necessary e.g. the realization of heat exchangers in which serpentine Flat tubes with both ends on the same tube block side open into the two terminal compartment components, the there separately or integrated into a single component Block vertical direction.
  • the have the features of one or more of claims 1 to 3 can is a tube block from a stack of serpentine Flat tubes are provided, which are arranged so that in the stack of adjacent flat tubes always either with their inlet-side or with their outlet-side sections contiguous. If the volume is as small as possible is desired for the terminal compartment components, can this is advantageous by suitable twisting of the flat tube ends, according to one of claims 1 to 3, with a corresponding off-center twisting maintain a small distance between adjacent flat tubes can be.
  • Fig. 1 shows an end flat tube twisting, in which the flat tube end section 3 opposite the flat tube middle section 2 is twisted by 90 ° and off center in such a way that the longitudinal axis 1 of the twisted end section by a selectable Amount dy with respect to the longitudinal axis 4 of the und twisted Middle section 2 in the vertical direction defined above, i.e. perpendicular to the plane of the undistorted flat tube middle section 2, is offset.
  • Fig. 2 shows e.g. as a condenser in a motor vehicle air conditioning system usable flat tube heat exchanger from Serpentine type, in which twisted according to FIG. 1, serpentine Flat tubes 5 are used.
  • the heat exchanger contains a tube / fin block in which the serpentine, flat tubes 5 in. each having four bends a stack successively arranged in the vertical direction y are, in the spaces between adjacent Flat tube middle sections 2 introduced heat-conducting corrugated fins 30 are.
  • Each flat tube 5 opens with its two according to Fig. 1 twisted off-center in the vertical direction End sections 3 on opposite long sides of the tube / fin block into a collecting pipe running longitudinally there 6, 7 a.
  • the manifolds 6, 7 act as connection space components, one of which has an end face Inlet 8 and the other via a corresponding end face Outlet 9 has.
  • This can be a heat transfer fluid 10 fed via the inlet 8 into a collecting tube 6 be where it opens into this manifold 6 Flat tube ends in the entry-side section 11 each Flat tube is forwarded to then through the respective to flow through the serpentine flat tube and from it outlet-side flat tube section 12 over those twisted flat tube ends to get into the other manifold 7, from which it flows out via the outlet 9.
  • adjacent flat tubes are always arranged so that they are either with their entry-side Sections 11 or with their outlet-side sections 12 face each other. Because these sections with each other are each at practically the same temperature no undesirable heat transfer effects between fluid, that flows in a flat tube, and fluid that flows in an adjacent one Flat tube flows on, causing a corresponding deterioration the efficiency of the intended heat transfer between the heat transfer fluid 10 on the one hand and one perpendicular to the plane of FIG. 2 by the Pipe / fin block medium flowing through, e.g. Air, avoids. It is through this special arrangement of the flat tubes 5 also no special measures for thermal insulation from opposite sections of adjacent Flat tubes are required, as in conventional arrangements It is expedient, in each case the entry side Section of a flat tube an outlet-side section opposite of the other flat tube.
  • Fig. 1 ensures that the distance between the not twisted middle sections of two neighboring inlet-side or outlet-side pipe sections 11, 12 is not larger, but is just as large as the distance between the remaining, not twisted flat tube middle sections 2 of the serpentine flat tubes 5. This has the consequence that the same corrugated fins between two adjacent flat tubes 5 30 can be used as between the middle sections 2 of each serpentine flat tube 5.
  • the Compliance with this condition allows one in the longitudinal direction of the block aligned arrangement of the on the block side concerned outflowing flat tube ends 3 and accordingly one aligned insertion of the corresponding push-through slots in the manifolds 6, 7.
  • the rectangular one chosen in this example Twisting of the flat tube ends 3 allows on the other hand achieving a minimal overall depth for the header pipes 6, 7, whose diameter is only slightly larger than the thickness the flat tubes 5 need to be.
  • the manifolds 6, 7 can are kept so small in their cross-section in this way, that they are not in the depth direction over the tube / fin block stand out, but noticeably if necessary can be designed narrower.
  • it goes without saying also twisting of the flat tube ends by less than 90 ° and / or with additional displacement in the depth direction possible.
  • FIG. 3 to 5 show application examples in which the Twisting the flat tube ends a lateral displacement in the Depth direction z includes.
  • Fig. 3 shows a section such a flat tube with a non-twisted middle section 13 and in contrast twisted end section 14.
  • the pipe end section 14 opposite the pipe middle section 13 at an angle of 90 ° and with an offset twisted by an amount dz, i.e. the longitudinal axis 15 of the twisted end section 14 is from the longitudinal axis 16 of the Middle section 13 by the amount dz in the z direction of selected coordinate system, i.e. in the pipe or block depth direction, added.
  • Fig. 4 shows a partial plan view of a tube / fin block with flat tubes 17 and between adjacent ones Flat tube middle sections lying corrugated fins 18, in which the flat tube ends are twisted according to FIG. 3.
  • the flat tubes 17 are serpentine in this example designed so that they have both ends 19a, 19b on the same Block side open.
  • the two end regions 19a, 19b are twisted in opposite directions in the z direction, i.e. the Both end regions 19a, 19b are symmetrical with their longitudinal axes to the longitudinal axis 20 of the non-twisted tube middle section 21 each removed from it by the amount dz.
  • each Flat tube 17 of the tube / fin block opens with his one twisted end portion 19a in a manifold 22 and with the other end region 19b into the other manifold 23.
  • the two are thus Collecting tubes 22, 23 running longitudinally on the same block side.
  • the manifolds 22, 23 can in turn be used produce a relatively small diameter so that they are both together side by side, as can be seen from FIG. 4, not project significantly beyond the depth of the tube / fin block.
  • the two can act as a collection or distribution channel Terminal compartment components in a common terminal compartment component be integrated, which has two chambers, the are separated by a longitudinal partition and in which each flat tube ends with one end.
  • Fig. 5 shows a detail of a perspective schematic sketch in a side view a modification of the tube / fin block of Fig. 4.
  • this variant there is a stack serpentine flat tubes 24 provided with their Ends on the same block side in two side by side Collecting pipes 25, 26 open.
  • the two manifolds 25, 26 lie here again offset next to each other in the block depth direction, as is the case with the heat exchanger of FIG. 4.
  • Flat tubes 24 corresponding to the heat exchanger of Fig. 2 so are arranged so that they are either with their entry-side Pipe sections 27 or their outlet side Pipe sections 28 are opposite.
  • This has the above too Fig. 2 described advantage of avoiding heat transfer losses noticeable between adjacent pipe sections different temperature.
  • the variant 5 which open into the respective manifold 25, 26 Ends of the adjoining inlet-side or outlet-side pipe sections 27, 28 of adjacent flat pipes 24 again relatively close to each other.
  • the flat tubes 24 are rectangular in their end sections and combines both in the vertical direction y and in the deep direction z staggered.
  • the displacement in the block vertical direction y is implemented in accordance with the example of FIG. 2, i.e. of the two twisted pipe ends, two neighboring ones Flat tubes 24 is one in positive and the other in the negative y direction by an appropriate amount with respect to the longitudinal axis of the flat tube middle section added.
  • a twisting of the offset in the block depth direction z Flat tube end area opposite the flat tube middle section can also be advantageous for straight line heat exchangers Use flat tubes on opposite tube block sides open into a respective terminal compartment component. Because by such a twisted transfer need equilateral Ends of adjacent flat tubes in the block vertical direction not be spaced apart, but can be in the block depth direction partially overlap. This can, for example the distance of the flat tubes in their middle section and thus the height of any corrugated ribs to be introduced there despite a right-angled twisting of the flat tube ends noticeably smaller than the width, i.e. Depth, the rectilinear Flat tubes are held.
  • two are offset in the block depth direction Rows of through-slots spaced from one another in the block direction provided for inserting the pipe ends.
  • the flat tube heat exchangers described above can be due to the properties mentioned for a given, required Heat transfer performance very compact and with comparative manufacture with little effort. It should be noted here in particular also that for the construction of the respective tube / fin block only one type of flat tube is required which is identical or in a 180 ° around the x-axis tilted position successively arranged in the tube block stack become. It is understood that in addition to those described Examples of further implementations of the invention Flat tube heat exchanger are possible, in particular also those with straight instead of serpentine flat tubes and with end twisting by less than 90 ° and / or any combination of up and down twisting offset by a desired amount. It further understood that the heat exchanger according to the invention is usable in all areas where traditionally Flat tube heat exchangers are used.

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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 (4)

  1. Echangeur de chaleur à tubes plats, en particulier condenseur de type serpentin, comportant :
    un bloc de tubes plats comprenant un ou plusieurs tubes plats (5) qui, par leurs deux tronçons d'extrémité (3), débouchent dans un composant spatial de raccordement respectif (6, 7), au moins un tronçon d'extrémité (3) étant tordu par rapport au tronçon médian du tube plat (2),
    caractérisé par le fait,
    qu'au moins l'un des deux tronçons d'extrémité du tube plat (3) est tordu excentriquement de sorte que son axe longitudinal (1) est décalé selon la direction latérale (y, z) par rapport à l'axe longitudinal (4) du tronçon médian du tube plat (2).
  2. Echangeur de chaleur à tubes plats selon la revendication 1,
    caractérisé en outre par le fait que le bloc de tubes plats contient une pile présentant plusieurs tubes plats (5) rectilignes ou en forme de serpentin, étant précisé qu'au moins une paire de tronçons d'extrémité (3), du même côté, de tubes plats voisins (5) sont tordus excentriquement de façon que les deux axes longitudinaux des tronçons d'extrémité, tordus, des tubes plats sont décalés parallèlement à la direction de la pile et en sens opposé par rapport à l'axe longitudinal du tronçon médian du tube plat.
  3. Echangeur de chaleur à tubes plats selon la revendication 1 ou 2, caractérisé en outre par le fait que le bloc de tubes plats contient une pile de plusieurs tubes plats (17) rectilignes ou en forme de serpentin, dont les deux zones d'extrémité respectives (19a, 19b) débouchent des côtés opposés du bloc tubulaire ou du même côté du bloc tubulaire, étant précisé qu'au moins une partie des zones d'extrémité (19a, 19b) est tordue, décalée selon la direction latérale (z) parallèle au plan du tronçon médian des tubes plats par rapport à l'axe longitudinal (20) du tronçon médian des tubes plats (21).
  4. Echangeur de chaleur à tubes plats selon l'une des revendications 1 à 3, caractérisé en outre par le fait que le bloc de tubes plats contient une pile présentant plusieurs tubes plats (5) en forme de serpentin qui, par leurs deux tronçons d'extrémité, débouchent des côtés opposés du bloc tubulaire ou du même côté du bloc tubulaire, dans un composant spatial de raccordement respectif courant le long du côté en question du bloc tubulaire, étant précisé que chaque groupe de deux tubes plats voisins est disposé de façon qu'un tronçon de tube, situé du côté entrée, de l'un des tubes plats soit voisin d'un tronçon de tube, situé du côté entrée, de l'autre tube plat ou bien qu'un tronçon de tube, situé du côté sortie, de l'un des tubes plats soit voisin d'un tronçon de tube, situé du côté sortie, de l'autre tube plat.
EP19970120670 1996-11-27 1997-11-26 Echangeur de chaleur à tubes plats, en particulier condenseur de type à serpentin Expired - Lifetime EP0845648B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19970120670 EP0845648B1 (fr) 1996-11-27 1997-11-26 Echangeur de chaleur à tubes plats, en particulier condenseur de type à serpentin

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19649129 1996-11-27
DE19649129A DE19649129A1 (de) 1996-11-27 1996-11-27 Flachrohr-Wärmeübertrager mit umgeformtem Flachrohrendabschnitt
EP19970120670 EP0845648B1 (fr) 1996-11-27 1997-11-26 Echangeur de chaleur à tubes plats, en particulier condenseur de type à serpentin

Publications (3)

Publication Number Publication Date
EP0845648A2 EP0845648A2 (fr) 1998-06-03
EP0845648A3 EP0845648A3 (fr) 1998-06-10
EP0845648B1 true EP0845648B1 (fr) 2002-01-30

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EP19970120670 Expired - Lifetime EP0845648B1 (fr) 1996-11-27 1997-11-26 Echangeur de chaleur à tubes plats, en particulier condenseur de type à serpentin

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Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19830863A1 (de) * 1998-07-10 2000-01-13 Behr Gmbh & Co Flachrohr mit Querversatz-Umkehrbogenabschnitt und damit aufgebauter Wärmeübertrager
DE19911334A1 (de) 1999-03-15 2000-09-21 Behr Gmbh & Co Sammelrohr für einen Wärmeübertrager und Herstellungsverfahren hierfür
EP1321734A1 (fr) * 2001-10-02 2003-06-25 Behr GmbH & Co. KG Echangeur de chaleur à tubes plats et procédé de fabrication
US20030102113A1 (en) * 2001-11-30 2003-06-05 Stephen Memory Heat exchanger for providing supercritical cooling of a working fluid in a transcritical cooling cycle
EP1459027B1 (fr) 2001-12-21 2008-10-29 Behr GmbH & Co. KG Echangeur thermique notamment destine a un vehicule
DE10229973A1 (de) 2002-07-03 2004-01-29 Behr Gmbh & Co. Wärmeübertrager
WO2004013558A2 (fr) * 2002-07-26 2004-02-12 Behr Gmbh & Co. Dispositif d'echange de chaleur
CN100533043C (zh) * 2002-07-26 2009-08-26 贝洱两合公司 热交换装置
DE10326381B4 (de) * 2003-06-12 2005-09-22 Jähn, Peter Turbulenzerzeuger
JP2005214459A (ja) * 2004-01-27 2005-08-11 Zexel Valeo Climate Control Corp 熱交換器用偏平チューブ、これを用いた熱交換器、及び熱交換器用偏平チューブの成形方法
CN114588865B (zh) * 2022-03-28 2023-09-15 江西红土地化工有限公司 一种农药用釜内物料恒温的冷却装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3416600A (en) * 1967-01-23 1968-12-17 Whirlpool Co Heat exchanger having twisted multiple passage tubes
US5036909A (en) * 1989-06-22 1991-08-06 General Motors Corporation Multiple serpentine tube heat exchanger
FR2693546B1 (fr) * 1992-07-09 1994-09-30 Valeo Thermique Moteur Sa Echangeur de chaleur à faisceau de tubes parallèles, en particulier pour véhicule automobile.

Also Published As

Publication number Publication date
EP0845648A3 (fr) 1998-06-10
EP0845648A2 (fr) 1998-06-03

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