EP3165866B1 - Échangeur de chaleur, en particulier fluide frigorigène haute pression - Google Patents

Échangeur de chaleur, en particulier fluide frigorigène haute pression Download PDF

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Publication number
EP3165866B1
EP3165866B1 EP16197286.4A EP16197286A EP3165866B1 EP 3165866 B1 EP3165866 B1 EP 3165866B1 EP 16197286 A EP16197286 A EP 16197286A EP 3165866 B1 EP3165866 B1 EP 3165866B1
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EP
European Patent Office
Prior art keywords
flat tubes
heat exchanger
regions
disposed
channel flat
Prior art date
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Active
Application number
EP16197286.4A
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German (de)
English (en)
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EP3165866A1 (fr
Inventor
Marina Kropf
Friedrich Wilhelm Marquardt
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.)
Tt&c Thermotransmission & Cooling Ug
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Tt&c Thermotransmission & Cooling Ug
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Publication of EP3165866A1 publication Critical patent/EP3165866A1/fr
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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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • 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
    • F28F1/10—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates

Definitions

  • the invention relates to a heat exchanger, which is particularly suitable for heat transfer tasks between high pressure refrigerant and air.
  • High-pressure refrigerants are of interest for various applications in refrigeration. Especially for reasons of environmental compatibility, carbon dioxide, R744, plays an increasingly important role as a high-pressure refrigerant.
  • a disadvantage of high-pressure refrigerants in connection with the dimensioning and design of heat exchangers for these refrigerants is that adapted to the high process pressures special design principles and materials are required to meet the safety requirements of a variety of applications.
  • a heat exchanger for a CO 2 vehicle air conditioning system wherein the channels are formed by a plurality of smaller channels, which are arranged on or in heat transfer plates, wherein a plurality of layers of heat transfer plates are soldered or welded together.
  • Such flat tubes are also referred to as multi-channel flat tubes and also go from the DE 102 41 635 A1 showing a flat tube heat exchanger and a manufacturing method for such disclosed.
  • JP S58 96986 A and the JP 2001 272184 A go heat exchanger from a plurality of Merhrkanalflachrohren out, which are meander-shaped according to the preamble of claim 1.
  • the object of the invention is thus to provide a heat exchanger for To provide, which is particularly suitable for high-pressure refrigerant and can be manufactured efficiently and has low construction dimensions.
  • a heat exchanger which is particularly suitable for high-pressure refrigerant and consists of a plurality of superimposed and mutually parallel multi-channel flat tubes and intervening fins.
  • the multi-channel flat tubes each have an end region at the ends, in which the multi-channel flat tubes are combined in each case.
  • connecting pieces are arranged, in which open the ends of the multi-channel flat tubes one side.
  • On the other side of the connecting piece there is a possibility of connection to generally standardized pipes, which lead the refrigerant out to the connecting piece or, on the other side, away from the connecting piece.
  • the adjacent multi-channel flat tubes are spaced from each other with spring blades and thermally contacted in a plurality of slit regions divided between the connecting tubes to the length of the flat tubes.
  • the majority of the multi-channel flat tubes are guided in sections parallel to each other and together in each case meander-shaped.
  • adjacent multi-channel flat tubes in the lamellar region are arranged parallel and straight to one another and spaced from one another by spring lamellae.
  • the design of the surface enlargement on the air side of the heat exchanger with spring blades represents a particularly cost-effective and efficient form of surface enlargement, which is very particularly advantageous to manufacture.
  • transition regions are arranged between the lamellar regions along the heat exchanger flat tubes, in which the adjacent multi-channel flat tubes are at least partially directly contacted with each other. From lamellar area to lamella area, a directional change of the orientation of the multi-channel flat tubes, which is realized by the arrangement of a transition area, preferably takes place.
  • the transition areas between the slat areas are parallel and straight.
  • the lamellar areas and the transition area are each arranged alternately and offset by 90 ° to each other.
  • a heat exchanger can be created, which has a generally rectangular and in particular even square air flow cross-section. This is particularly preferably achieved by arranging three fin regions and two transition regions between the end regions of the multi-channel flat tubes of the heat exchanger.
  • a preferred embodiment of the invention is that eight multi-channel flat tubes of the same length are arranged in the heat exchanger.
  • the lamellar areas are formed by arranging a plurality of intertwined spring lamellae of spiral springs between the multi-channel flat tubes.
  • the lamellae can thus be made particularly cost-effective from standard metalworking products, the spiral springs, which leads overall to cost-effective solutions in the production of Hochlichruckmeübertragern.
  • three intertwined and interpenetrated spring plates are arranged between adjacent multi-channel flat tubes in the lamellar region, the orientation of the adjacent spiral springs alternately changing. This means that the middle of the three coil springs has a different orientation than the two adjacent outer coil springs. Under the orientation of the coil springs is to be understood that they are executed accordingly once left and another time turned right.
  • connection between the multi-channel flat tubes and the spring blades is performed with thermosetting adhesive. This eliminates the need for soldering and welding the slats to the multi-channel flat tubes.
  • the invention relates conceptually a heat exchanger in a modified structure with respect to the pipe run of Mehrkanalflachrohre. Particularly noteworthy is that only two connection points of the multi-channel flat tubes with each other and to the connecting pieces located in each case in the end regions exist. This well controllable concentration of potential leaks favors the use of heat exchangers in stationary and mobile applications.
  • the heat exchanger design is compact and universally designed, and heat exchangers of the proposed design can replace almost any conventional heat exchanger, with smaller dimensions required for the same performance.
  • the heat exchanger is suitable for higher pressures and thus is a use in high-pressure refrigerant circuits with CO 2 as a refrigerant possible.
  • the heat exchanger consists of eight Multi-channel flat tubes, which have dimensions of 1.8 mm in height and 16 mm in width.
  • the multi-channel flat tubes are bent meander-shaped and each have an equal length. At the inlet and outlet of the fluid flowing through the multi-channel flat tubes, these are bundled together in the end regions.
  • the multi-channel flat tubes are received at these end of each pipe receiving with adapter and connected by laser welding, for example, tightly together and the pipe receiving.
  • Adapters are connected to the tube receptacles, which have corresponding connection dimensions for integration into the circuit of the air conditioning system.
  • the dimensions of the embodiment according to the invention are 278 mm x 278 mm and are thus of square flow cross-section for the air.
  • the length of the multi-channel flat tubes is in each case 1065 mm.
  • the heat exchanger has a very compact design, in which there are only two connection points of the multi-channel flat tubes.
  • the joints are designed much more stable than comparable collector constructions according to the prior art and thus provide the entire heat exchanger a significantly higher resistance to mechanical influences.
  • Use - related shocks or deformations, such as those in light accidents in the area of Heat exchangers can certainly occur when used in vehicles, the heat exchanger can withstand due to its robust design principle.
  • Another advantage is that costly soldering for the integration of each individual Mehrkanalflachrohres omitted in a collector, since all Mehrkanalflachrohre open at their ends in each case only one connection point, which can be accurately sealed by laser welding machine.
  • the connecting elements consisting for example of adapter and pipe receiving, are easy to produce molded parts, which promotes economic production of the heat exchanger.
  • the design principle and the parallel guidance of the multi-channel flat tubes ensured a continuous liquefaction of the refrigerant when using the heat exchanger as a condenser and there is no additional wet steam area. This is due to the fact that the length of the individual multi-channel flat tubes differs significantly from the conventional heat exchanger tubes.
  • the meandering shape of the multi-channel flat tubes allows a compact design of the heat exchanger with the same power.
  • the introduction of spring blades between the multi-channel flat tubes causes a higher turbulence of the air flow and thus contributes to the improvement of the mode of action.
  • the spring blades themselves are clearly more stable than conventional lamellas made of thin aluminum sheet due to their interlaced construction and the thermosetting compound.
  • the construction of spring blades allows a significantly better cleaning ability, which is particularly interesting when using the heat exchanger as a condenser and associated pollution.
  • the selection of suitable multi-channel flat tubes for the heat exchanger also allows the operation of the refrigerant circuits at much higher pressures and in particular the use of CO 2 as a refrigerant with this heat exchanger type is possible.
  • a heat exchanger 1 is shown in cross-section, which is composed of a plurality of multi-channel flat tubes 2. Between the multi-channel flat tubes 2 are spring blades 3, in part on the left side of FIG. 1 represented, arranged. The ends of the multi-channel flat tubes 2 each form an end region 11, in which the ends of the multi-channel flat tubes 2 are combined. The ends of the multi-channel flat tubes 2 open into a tube receiving 5, which forms the connecting piece 8 with an adapter 4.
  • the adapter 4 has the corresponding geometric dimensions towards the lines outside the heat exchanger 1.
  • the adapter 4 is designed replaceable, so that the heat exchanger 1 is adaptable to different piping systems.
  • adapter 4 and pipe receiving 5 are designed as one component, which simplifies the production and further reduces the susceptibility to leakage.
  • the multi-channel flat tubes 2 On the way between the two end regions 11, the multi-channel flat tubes 2 have different areas. From the end region 11, the multichannel flat tubes 2 pass over into a lamellar region 9 and then after directional deflection by 90 °, the multichannel flat tubes 2 merge into a transitional region 10, in which the multichannel flat tubes 2 are contacted at least partially directly with one another. From the transition region 10, the multi-channel flat tubes 2 turn to a lamellar region 9 deflected and go to a further deflection in a transition region 10 over. From the transition region 10, the multi-channel flat tubes 2, after renewed deflection, pass into the end region 11 and are guided therein to the connecting piece 8. The two connecting pieces 8 are in two planes in the opposite direction.
  • Fig. 2 is a view in the axial direction of the multi-channel flat tubes 2 on the adapter 4 and the raw receptacle 5 is shown.
  • the multi-channel flat tubes 2 are welded in this fixation in the tube receiving 5 by laser welding.
  • the multi-channel flat tubes 2 are flowed through in this configuration from one end portion 11 to the other in parallel with refrigerant.
  • Fig. 3 three spring blades 3 are shown, which are designed as spring blades 7 with a winding in left orientation and as a spring blades 6 with a winding in the right orientation.
  • the spring blades 6, 7 are made of aluminum because of the good heat transfer properties and intertwined under mechanical stress.
  • the coil springs are mechanically very robust and hold in shape also mechanically demanding cleaning method, for example by means of high-pressure cleaner, in contrast to slats of aluminum sheet according to the prior art stood.

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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 (7)

  1. Convertisseur de chaleur (1), notamment pour agent frigorifique à haute pression, en provenance de plusieurs tuyaux plats multicanaux (2) avec lamelles intermédiaires, les extrémités des tuyaux plats multicanaux (2) étant regroupées dans une zone d'extrémité (11), les tuyaux plats multicanaux
    (2) étant regroupés dans les deux zones d'extrémité (11) au moyen de raccords (8) et les tuyaux plats multicanaux (2) voisins étant espacés les uns des autres et contactés thermiquement à l'aide de lamelles de ressort (6, 7) dans plusieurs zones de lamelles (9) entre les raccords (8), les plusieurs tuyaux plats multicanaux (2) étant acheminée parallèlement les uns aux autres, par tronçons et formant conjointement des méandres et étant disposés, entre les zones de lamelles,
    (9) en zones de transition (10), au sein desquelles les tuyaux plats multicanaux (2) sont, au moins partiellement, en contact direct les uns avec les autres, caractérisé en ce que les zones de lamelles (9) se composent de plusieurs lamelles de ressort (6, 7) en spiral enchevêtrées les unes dans les autres, trois lamelles de ressort (6, ,7) étant disposées et l'orientation des ressorts en spiral changeant à tour de rôle.
  2. Convertisseur de chaleur (1) selon la revendication 1, caractérisé en ce que les tuyaux plats multicanaux voisins (2) sont disposés parallèlement les uns aux autres dans la zone des lamelles (9) et sont séparés les uns des autres par des lamelles de ressort (6, 7).
  3. Convertisseur de chaleur (1) selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que les zones de transition (10) entre les zones de lamelles (9) sont disposées parallèlement.
  4. Convertisseur de chaleur (1) selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la zone de lamelles (9) et la zone de transition
    (10) sont disposées par alternance et selon un décalage de 90° les unes par rapport aux autres.
  5. Convertisseur de chaleur (1) selon l'une quelconque des revendications 1 à 4, caractérisé en ce que trois zones de lamelles (9) et deux zones de transition (10) sont disposées entre les zones d'extrémités (11).
  6. Convertisseur de chaleur (1) selon l'une quelconque des revendications 1 à 5, caractérisé en ce que huit tuyaux plats multicanaux (2) de même longueur sont disposés dans le convertisseur de chaleur.
  7. Convertisseur de chaleur (1) selon l'une quelconque des revendications 1 à 6, caractérisé en ce que la liaison entre les tuyaux plats multicanaux (2) et les lamelles de ressort (6, 7) est composée d'une colle thermodurcissable.
EP16197286.4A 2015-11-05 2016-11-04 Échangeur de chaleur, en particulier fluide frigorigène haute pression Active EP3165866B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015118969.0A DE102015118969A1 (de) 2015-11-05 2015-11-05 Wärmeübertrager, insbesondere für Hochdruckkältemittel

Publications (2)

Publication Number Publication Date
EP3165866A1 EP3165866A1 (fr) 2017-05-10
EP3165866B1 true EP3165866B1 (fr) 2019-07-17

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Application Number Title Priority Date Filing Date
EP16197286.4A Active EP3165866B1 (fr) 2015-11-05 2016-11-04 Échangeur de chaleur, en particulier fluide frigorigène haute pression

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EP (1) EP3165866B1 (fr)
DE (1) DE102015118969A1 (fr)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE722235C (de) * 1932-04-16 1942-07-04 Manuf Generale Metallurg Sa Verfahren zur Herstellung von Rippenrohren
JPS5896986A (ja) * 1981-12-04 1983-06-09 Nissan Motor Co Ltd 熱交換器
DE19729497A1 (de) * 1997-07-10 1999-01-14 Behr Gmbh & Co Flachrohr-Wärmeübertrager
DE19729496A1 (de) * 1997-07-10 1999-01-14 Behr Gmbh & Co Flachrohr-Wärmeübertrager in Serpentinenbauweise
DE10110828A1 (de) 2000-03-16 2001-09-27 Bosch Gmbh Robert Wärmeübertrager für eine CO2-Fahrzeugklimaanlage
JP2001272184A (ja) * 2000-03-27 2001-10-05 Sanden Corp 熱交換器
DE10146824A1 (de) 2001-09-18 2003-04-24 Behr Gmbh & Co Wärmeübertrager-Flachrohrblock mit umgeformten Flachrohrenden
EP1321734A1 (fr) 2001-10-02 2003-06-25 Behr GmbH & Co. KG Echangeur de chaleur à tubes plats et procédé de fabrication
DE102005044754A1 (de) 2005-09-20 2007-03-29 Behr Gmbh & Co. Kg Mehrreihiger Wärmeübertrager und Wellrippe für denselben
JP5983335B2 (ja) * 2011-11-30 2016-08-31 株式会社デンソー 熱交換器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
EP3165866A1 (fr) 2017-05-10
DE102015118969A1 (de) 2017-05-11

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