EP1568960A2 - Echangeur de chaleur avec joues latérales - Google Patents

Echangeur de chaleur avec joues latérales Download PDF

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Publication number
EP1568960A2
EP1568960A2 EP05001633A EP05001633A EP1568960A2 EP 1568960 A2 EP1568960 A2 EP 1568960A2 EP 05001633 A EP05001633 A EP 05001633A EP 05001633 A EP05001633 A EP 05001633A EP 1568960 A2 EP1568960 A2 EP 1568960A2
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
tongue
side part
exchanger according
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.)
Withdrawn
Application number
EP05001633A
Other languages
German (de)
English (en)
Other versions
EP1568960A3 (fr
Inventor
Wolfgang Geiger
Michael Dipl.-Ing. Kranich
Karl-Heinz Dipl.-Ing. Staffa
Christoph Dipl.-Ing. Walter
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 EP1568960A2 publication Critical patent/EP1568960A2/fr
Publication of EP1568960A3 publication Critical patent/EP1568960A3/fr
Withdrawn legal-status Critical Current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
    • F28D1/05391—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits combined with a particular flow pattern, e.g. multi-row multi-stage 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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core

Definitions

  • the invention relates to a heat exchanger with at least two parallel to each other and juxtaposed collecting pipes - after the Preamble of claim 1.
  • Flat tube heat exchanger especially for conventional and supercritical Refrigeration circuits are known in many embodiments.
  • aluminum heat exchangers are soldered in Construction used.
  • the heat exchangers have a block with flat tubes and corrugated fins, wherein the ends of the flat tubes in manifolds lead.
  • supercritical refrigeration circuits with high pressures must Components, in particular flat tubes and manifolds accordingly pressure resistant be dimensioned.
  • Such heat exchangers were described by DE-A 196 49 129, DE-A 199 06 289 or DE-A 100 07 159 known.
  • each having a ribbed outside is usually completed by side panels that fit with the corrugated ribs and / or are soldered to the headers to the heat exchanger to give the necessary support.
  • DE-A 198 00 943 was a Flat tube heat exchanger known in which the ends of the side parts inserted into slots in the manifold and soldered there.
  • This solution is disadvantageous, as in the assembly of this heat exchanger problems occur during insertion of the side parts in the slots of the manifold, because the block size before soldering is greater than the distance of the slots is in the manifold.
  • leaks can occur during soldering the side part with the manifold or after the soldering in operation occur.
  • the known heat exchanger have per flat tube row in the Usually two manifolds, each at the pipe ends. Partially also pressure-resistant manifolds with two parallel longitudinal channels known, for.
  • These Heat exchangers are single-row and are used by both media, z. As a refrigerant such as CO2 and a cooling air flow in the cross flow flows through.
  • the invention is based on a heat exchanger, which two parallel juxtaposed collecting tubes, each with in Air flow direction behind one another arranged rows of tubes or flow channels in fluid communication - such a construction was known from EP-B 414 433.
  • the heat exchanger units are flowed through by a refrigerant in succession, and indeed contrary the air flow direction, d. H. in the countercurrent. This is the Refrigerant both in the depth (contrary to the direction of air flow) as also in the width (transversely to the air flow direction) deflected.
  • the problem underlying the invention is that heat transferred from one header to the adjacent and thus the performance is reduced because between two headers due to different Temperatures of the refrigerant there is a temperature gradient.
  • the headers are made from aluminum sheet clad in Iotplated aluminum on both sides.
  • the tongue is in one piece formed with the side part, for example as an extension on the front side End of side panel.
  • the tongue is opposite The adjacent to the heat exchanger side part to about 90 degrees to their Longitudinal axis twisted so that they with their wall thickness between the headers comes to rest and thus acts as a spacer. simultaneously this achieves the advantage that the side parts of the heat exchanger are fixed before soldering.
  • the tongue is in the front end of the side panel cut, so that a larger Twist length for the tongue results.
  • they can be cut through produced cloth on both sides of the tongue as attacks of the Side part are used on the headers. Achieved with it one further improvement in the fixation and support of the side panels.
  • the end of the Tongue be folded one or more times. This gives the advantage of a greater distance between the headers by multiplying the Material thickness.
  • on the side part be provided inwardly projecting nubs or beads, which in the engage outer corrugated fin position and thus fix the side part further.
  • FIG. 1 shows a corner cutout of a heat exchanger 1 according to the invention, which has a heat exchanger block 4 constructed of flat tubes 2 and corrugated fins 3, referred to for short as a block.
  • the flat tubes 2 have tube ends 2a, which are twisted with respect to the flat tubes 2 about its longitudinal axis, as is known for example from the aforementioned DE-A 196 49 129.
  • the Blokkes 4 two mutually parallel manifolds 5, 6 are arranged, which have an open ⁇ -shaped cross-section 5a, 6a with a pointing in the direction of the block 4 slot 5b, 6b.
  • the pipe ends 2a of the flat tubes 2 are accommodated, which form a first row of tubes of the heat exchanger 1.
  • a side part 7 is arranged, which has a tongue 8 in its upper, frontal part, which projects between the two manifolds 5, 6 and separates them from each other or keeps at a distance ,
  • the side part 7 is formed as a flat sheet metal strip with a substantially flat surface 7a, while the tongue 8 is rotated relative to this flat surface 7a by about 90 degrees.
  • the rest, not shown, part of the heat exchanger may be formed approximately symmetrically to the illustrated part, ie also with two parallel manifolds, in which open the pipe ends of the flat tubes 2, not shown.
  • the headers are interconnected by a circuit, not shown here but known.
  • the heat exchanger 1 is preferably used as a gas cooler for a CO2-operated air conditioning system of a motor vehicle, ie for a supercritical refrigeration cycle.
  • the refrigerant CO2 thus enters the gas cooler 1 at approximately 130 bar and 150 degrees Celsius and is cooled on the secondary side by ambient air via the corrugated fins 3.
  • the gas cooler 1, which - as mentioned - has two rows of tubes is flowed through in cross-counterflow, ie the refrigerant enters first in the leeward row of pipes and leaves the gas cooler 1 on the windward side, with a successive cooling with falling temperature up to about 45 degrees Celsius takes place.
  • FIG. 2 shows a schematic representation of a gas cooler 9 in a side view, ie with a view of a side part 10, which has a tongue 11 at the upper front end 10a which is produced by turning relative to the side part 10.
  • manifolds 12, 13 - arranged here - with a circular cross-section are on both sides of the tongue 11. They are on the refrigerant side with two rows of tubes or rows of flow channels in connection, which are shown here only two arrows R1, R2. The direction of flow of the air is indicated by an arrow L.
  • the refrigerant CO2 enters the collecting tube 12 in a supercritical, ie single-phase state, represented by an arrow E, flows through the leeward tube row R1 from top to bottom, at the end of the gas cooler 9 (not shown) in the depth, ie opposite to the air flow direction L. deflected flows through the windward tube row R2 from bottom to top and leaves the gas cooler 9 via the manifold 13, represented by an exit arrow A.
  • This is a simple variant of the cross countercurrent, which is preferred for this gas cooler.
  • Within the cross countercurrent deflections in the width ie within the row of tubes R1 and / or the row of tubes R2 are possible.
  • the headers 12, 13, between which there is a significant temperature gradient due to the different refrigerant temperature are separated by the tongue 11 of the side part 10, that is kept at a distance, so over the largest length, a thermally insulating gap is formed and maintained. This is advantageous for the performance of the heat exchanger in the cross counterflow.
  • the tongue 11 can also - which is not shown in the drawing - be soldered to the adjacent headers 12, 13.
  • the front side 10a of the manifold 10 abuts the underside of the manifolds 12, 13 and causes a fixation of the side part 10.
  • On the opposite, not shown side of the gas cooler 9 is a mirror-image side part, also arranged with tongue, so that both tubes 12, 13th be kept parallel by the wall thickness of the tongue 11 at a distance. It is within the scope of the invention to expand the gas cooler by more rows of tubes and other headers, to extend the side part over all rows of tubes and to provide with one or more tongues, which are each arranged between adjacent headers.
  • FIG. 3 shows a further exemplary embodiment of the invention, namely a heat exchanger 14 likewise designed as a gas cooler with two collecting pipes 15, 16 and a side part 17.
  • This gas cooler 14 corresponds in its basic structure and flow to the gas cooler 9 according to FIG. 2.
  • the side part 17 has a twisted and folded at the end tongue 18, which was separated by two parallel cuts 19, 20 from the side part 17 and rotated by 90 degrees.
  • the folding at the end of the tongue 18 results in twice the material thickness and thus an increased distance between the headers 15, 16.
  • the two cuts 19, 20 on both sides of the tongue 18 lobes 21, 22 emerged, which ends with the undersides of the Hanging or supporting collecting pipes 15, 16.
  • the tabs 21, 22 concave ends 21 a, 22 a which conform to the rounding of the headers 15, 16.
  • the side part 17 can thus be better fixed on the one hand before soldering and is connected after soldering with the headers 15, 16 by a fixed solder joint, so that there is a higher torsional stiffness for the entire heat exchanger.
  • Fig. 4 shows a section in the plane IV-IV in Fig. 3, that is through the side part 17, the outermost layer of a corrugated fin 3 and a multi-chamber tube formed flat tube 23.
  • the side part 17 has in its central region an inwardly projecting nub 24, which engages in the corrugated fin 3, wherein this can be done by deformation of the corrugated fin or by positive engagement of the knob 24 in a corresponding recess in the corrugated fin 3.
  • a plurality of nubs 24 - or corresponding beads - provided over the length of the side part, resulting in a good fixation of the side part.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP05001633A 2004-02-24 2005-01-27 Echangeur de chaleur avec joues latérales Withdrawn EP1568960A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410009415 DE102004009415A1 (de) 2004-02-24 2004-02-24 Wärmeübertrager mit Seitenteilen
DE102004009415 2004-02-24

Publications (2)

Publication Number Publication Date
EP1568960A2 true EP1568960A2 (fr) 2005-08-31
EP1568960A3 EP1568960A3 (fr) 2010-09-15

Family

ID=34745290

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05001633A Withdrawn EP1568960A3 (fr) 2004-02-24 2005-01-27 Echangeur de chaleur avec joues latérales

Country Status (2)

Country Link
EP (1) EP1568960A3 (fr)
DE (1) DE102004009415A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005058769B4 (de) 2005-12-09 2016-11-03 Modine Manufacturing Co. Ladeluftkühler

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3030036B2 (ja) * 1989-08-23 2000-04-10 昭和アルミニウム株式会社 複式熱交換器
JPH07253288A (ja) * 1994-03-15 1995-10-03 Calsonic Corp アルミニウム合金製熱交換器
WO1998009124A1 (fr) * 1996-08-29 1998-03-05 Zexel Corporation Echangeur thermique
US6216776B1 (en) * 1998-02-16 2001-04-17 Denso Corporation Heat exchanger
DE10007159A1 (de) * 1999-03-08 2000-09-14 Denso Corp Kühler- und Verdampferrohr für superkritischen Kältekreislauf
JP4106830B2 (ja) * 1999-09-30 2008-06-25 株式会社デンソー 複式熱交換器

Also Published As

Publication number Publication date
DE102004009415A1 (de) 2005-09-01
EP1568960A3 (fr) 2010-09-15

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