EP2096399B1 - Wärmetauscher mit modularen böden - Google Patents

Wärmetauscher mit modularen böden Download PDF

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Publication number
EP2096399B1
EP2096399B1 EP09150708A EP09150708A EP2096399B1 EP 2096399 B1 EP2096399 B1 EP 2096399B1 EP 09150708 A EP09150708 A EP 09150708A EP 09150708 A EP09150708 A EP 09150708A EP 2096399 B1 EP2096399 B1 EP 2096399B1
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EP
European Patent Office
Prior art keywords
heat exchanger
exchanger according
support
cover
tubes
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EP09150708A
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English (en)
French (fr)
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EP2096399A1 (de
Inventor
Daniele Stolfo
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REFRION Srl
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Refrion Srl
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    • 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
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F28F9/0221—Header boxes or end plates formed by stacked elements
    • 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
    • F28D1/05316—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05341—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
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/06—Arrangements for sealing elements into header boxes or end plates by dismountable joints

Definitions

  • the present invention refers to a heat exchanger provided with modular headers.
  • Heat exchangers in particular those of the finned-pack type used in the production of water-cooled heat-exchange banks, evaporators and condensers, are widely known in the art to be generally comprised of a plurality of tubes, through which a liquid medium is caused to circulate, and which are arranged in a pattern of parallel rows, or ranks, that are running transversally relative to the flow direction of the air.
  • the rows of tubes are connected to each other by a pair of manifolds, or headers, comprising at least one conduit for letting the liquid medium into the heat exchanger and at least one outlet conduit for the liquid medium to be able to exit the heat exchanger.
  • a first drawback lies in the fact that manufacturing time requirements are markedly dependant on the number of tubes which the heat exchanger is comprised of, since such number substantially determines the number of weldings or brazings that have to be done for the various rows or ranks of the heat exchanger to be fluidly connected to each other.
  • a second drawback derives from the need for all of the thus completed weldings or brazings to then undergo rigorous and laborious tests to check them for perfect execution.
  • these checks include a test of strength and leak-resistance of the tubes under internal pressurization conditions, which is carried out by insufflating dry air into the tubes while the heat exchanger is submerged in a water bath. It can be most readily appreciated that such tests strongly contribute to an extension of the time needed to complete the heat-exchanger manufacturing process, further to obviously implying the use of specially designed equipment and skilled personnel.
  • a further drawback connected with the use of the above-mentioned U-shaped pipe unions, or connection elbows, derives from the need for a material to be used - both for the tubes and the related unions - that is able to be easily welded, or brazed, at low costs.
  • materials such as copper, which, on the other hand, has a specific weight and a purchase price that are definitely higher than those of other materials, such as for instance aluminium.
  • Mass-produced heat exchangers for this kind of application generally comprise a plurality of tubes extending between a plurality of hollow interspaces and a pair of headers provided at the extremities of the tubes.
  • These headers are comprised of box-like bodies, each one of which comprises a support provided with a plurality of apertures adapted to receive and accommodate the extremities of the tubes, and a cover associated to such tube support.
  • the internal cavity of the headers is subdivided into sections by a plurality of partitions, so that the liquid medium circulating in the tubes can be caused to pass several times to and from a header and the other one in view of enhancing the heat-exchange effect and, as a result, the efficiency of the whole heat exchanger.
  • An example of heat exchangers of this kind is described in the European Patent specification EP 1 046 876 .
  • the structure of the heat exchangers of the above-described kind has however a drawback in that is hardly adaptable to a production of the heat exchanger in various sizes and capacities thereof in any reasonably easy and low-cost manner.
  • the headers are specially and rigidly sized in accordance with the size of the heat exchanger which they are intended for, and are not adaptable to heat exchangers having sizes differing from the design ones.
  • the need disadvantageously arises for headers of a pre-defined size to be used, which must therefore be each time produced to exactly comply with the particular size of the heat exchanger which they have to be associated to, actually. This introduces poor flexibility in the manufacturing process, along with an overall increase in the tools needed to cope with generally wide-ranging production requirements.
  • a further drawback of heat exchangers of the kind disclosed in EP 1 046 876 lies in the tightness, i.e. liquid leakage problems, as well as problems connected with the ability of the headers to work correctly when attempts are made to apply them to heat exchangers having any higher number of ranks than a single one, such as for instance a number situated between 3 and 5. This is basically due to the increased flow rates of liquid medium that the heat exchanger is due to handle and the pressures which the headers are subject to.
  • Another purpose of the present invention is to provide a heat exchanger that, further to being reliable, requires shorter manufacturing times than prior-art heat exchangers in general.
  • Yet another purpose of the present invention is to provide a heat exchanger that can be easily produced in a wide range of sizes and capacities through simple and quick adaptations of the modular headers thereof.
  • a further, equally important purpose of the present invention is to provide a heat exchanger, in which the number of the ranks of the heat exchanger can be varied in a simple manner according to actual needs, substantially without this implying any alteration in production times.
  • Still a further purpose of the present invention is to provide a heat exchanger that can be equally well manufactured using materials of a different nature, such as copper, aluminium and steel.
  • a heat exchanger is comprised of a plurality of tubes 1 that have a cross-section in a round or oval shape and are arranged into one or several ranks, preferably in a number situated between 3 and 5, which extend between a plurality of hollow interspaces 2 defined by finned surfaces 3 interposed between two contiguous ranks of tubes 1.
  • the finned surfaces 3 are preferably comprised of corrugated sheets associated to the tubes.
  • the heat exchanger further comprises a pair of headers 4 located at the end portions, i.e. extremity regions 7, 8 of the tubes 1.
  • headers 4 are intended to convey a liquid medium in a first pressure and temperature condition into the heat exchanger to let such liquid fluid out of the same heat exchanger in a second pressure and temperature condition different from the first condition.
  • the change in the pressure and the temperature of the liquid medium is induced by the heat-exchange process taking place between the same liquid medium and the air flowing into and through the hollow interspaces due to the forced convection effect brought about by the action of one or several fans (not shown in the Figures).
  • the liquid-medium inlet and outlet orifices have been intentionally omitted in the representation of the headers; it will however be readily appreciated that these may be provided on each header 4 in any of a number of generally known manners.
  • Figure 2 shows a perspective view of one of the headers 4 of the heat exchanger.
  • the header 4 includes a support 5 provided with a plurality of first apertures 6 adapted to receive and accommodate the extremity regions 7, 8 of the tubes 1.
  • a cover 9 is removably associated to the support 5 with the aid of means largely known as such in the art, such as for instance screw means, press-fit couplings, and the like.
  • the cover 9 is provided to be comprised of a plurality of first modular members 10 that are associated with each other - in a removable manner - by means of first conjugate surfaces 11 a, 11 b.
  • the modular members 10 of the cover 9 consists of dome-shaped elements, and the conjugate joining surfaces 11 a, 11 b are provided with a set of teeth 12 intended to prevent the members from displacing relative to each other in a first transverse direction relative to the longitudinal direction of the members 10, while at the same time enabling them to displace in a second transverse direction that is orthogonal to both the first transverse direction and the longitudinal direction of the modular members 10, i.e. the direction coinciding with the prevailing or major dimension of each modular member 10.
  • these modular members 10 are arranged so as to at least partially overlap each other, as this is shown in Figure 2 .
  • each such modular member 10 making up the cover i.e. the surface that lies facing the support 5 when the cover 9 and the support 5 are assembled, is provided with a plurality of accommodations 14 adapted to receive one or several partitions 15.
  • Each partition 15 is used to separate, i.e. subdivide the compartments 16 ( Figure 1 ) that are created by assembling the cover 9 onto the support 5 into two or more sections.
  • the liquid medium circulating in the tubes 1 can be conveyed from a header 4 to the other one following a flow path that is determined by the particular arrangement selected for such sections.
  • the compartments 16 of each header 4 are shown to be subdivided into four sections.
  • the partitions 15 can be substantially embodied in two basic forms thereof.
  • a first embodiment calls for the partition 15 to be made up by a simple wall capable of enabling the compartments 16 to be subdivided into liquid-tight sections, i.e. sections that are effective in preventing the liquid medium from flowing or leaking into and from two contiguous sections of a same header 4.
  • partitions 15 when the compartments 16 of the headers 4 are subdivided into sections by means of partitions 15 made in accordance with this first embodiment, such partitions 15 must be located in the headers 4 according to a staggered arrangement, i.e. in such positions as to ensure that the tubes 1 that receive liquid medium from a section of a first header 4 will then discharge said liquid medium into two or more sections of the second header 4 of the heat exchanger.
  • these partitions 15 are made in the form of a wall provided with one or more apertures 17 ( Figure 1 ), which enable the liquid medium that happens to be in contiguous sections of the same compartment 16 of a header 4 to flow to and from such sections.
  • partitions 15 made in accordance with this second embodiment thereof, the possibility will arise for sections to be obtained, which have substantially the same volume, as this is shown in Figure 1 , while anyway enabling the liquid medium circulating in the tubes 1 to repeatedly displace from a header 4 to the other one by flowing through the entire heat exchanger.
  • the partitions 15 are provided with one or more recesses adapted to receive and accommodate at least a portion of the tubes 1.
  • the support 5 includes a plurality of second modular members 18, as well, which are again associated to each other in a removable manner by means of conjugate surfaces 19a, 19b.
  • the conjugate surfaces 19a, 19b of the modular members 18 of the support 5 are provided with a set of teeth 24 intended to prevent the members from displacing relative to each other in a first transverse direction relative to the longitudinal direction of the same members 18.
  • the modular members forming the support 5 and the cover 9 of each header 4 are made of a polymeric material, thereby reducing the overall weight of the heat exchanger.
  • sealing means 20 such as for instance gaskets, placed around said extremity regions 7, 8.
  • the sealing means 20 are arranged between the cover 9 and the support 5 and comprise in turn a plurality of modular portions 21, each one of which has a length that is greater than or equal to the length of each of said modular members 10, 18 forming the cover 9 and the support 5, respectively, of the header 4.
  • the position of the interface between two contiguous portions 21 of the sealing means 20 is staggered relative to, i.e. does not coincide with the position of the interface between two modular members 10, 18, thereby improving the overall liquid-tightness of the header 4 as a whole.
  • a thin strengthening plate 22 may be associated to the support 5.
  • such thin strengthening plate 22, which is preferably made of metal, comprises a plurality of apertures 23 located in positions corresponding to those of the apertures 6 of the support 5, so that the extremity regions 7, 8 of the tubes 1 can be accommodated in and supported by both the support 5 and the plate 22.
  • the thin strengthening plate 22 may be provided as shown in Figure 2 between the support 5 and the cover 9 or, if preferred, may be arranged at the base of the support 5, i.e. in a position lying opposite to the side of the support 5 onto which the cover 9 is joined.
  • a heat exchanger according to the present invention can be effectively applied in fluid-carrying circuits of air-conditioning equipment for large rooms or buildings, in which the radiating pack of the heat exchanger, in a plan view thereof, has a height and a length situated anywhere between 1,500 and 2,200 mm.
  • the particular contrivances adopted in the construction of a heat exchanger according to the present invention are such as to make it possible for tubes and pipes made of a variety of different materials to be used with the same effectiveness from a manufacturing point of view, thereby enabling both the manufacturer and the user to each time select the kind of heat exchanger that best suits the actual application by ideally meeting the needs of the particular installation, which the heat exchanger is due to be fitted in, without incurring disadvanatgeous oversizing or undersizing problems.

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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)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Central Heating Systems (AREA)
  • Other Air-Conditioning Systems (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Claims (15)

  1. Wärmetauscher, insbesondere vom mit Lamellen bepackten Typ, aufweisend:
    - eine Mehrzahl von Rohren (1), die sich zwischen einer Mehrzahl von ausgesparten Zwischenräumen (2) erstrecken,
    - mindestens ein Kopfstück (4), aufweisend einen Träger (5), der mit einer Mehrzahl von ersten Öffnungen (6) versehen ist, die ausgebildet sind, um einen Endbereich (7, 8) der Rohre (1) aufzunehmen, und eine Abdeckung (9) dadurch gekennzeichnet, dass die Abdeckung (9) mit dem Träger (5) lösbar verbunden ist und eine Mehrzahl von ersten modularen Elementen (10) aufweist, die erste konjugierte Flächen (11a, 11b) aufweisen, welche ausgebildet sind, um miteinander lösbar verbunden zu werden, und der Träger (5) eine Mehrzahl von zweiten modularen Elementen (18) aufweist, die zweite konjugierte Flächen (19a, 19b) aufweisen, welche ausgebildet sind, um miteinander lösbar verbunden zu werden, wobei jedes der ersten und zweiten Mehrzahl von modularen Elementen (10, 18) jeweils entlang einer Reihe verbunden sind, die in Längsrichtung der Elemente (10, 98) verlaufen.
  2. Wärmetauscher nach Anspruch 1, wobei die konjugierten Flächen (11a, 11b; 19a, 19b) mit einem Satz von Zähnen (12, 24) versehen sind, die angeordnet sind, um zu verhindern, dass sich Elemente (10, 18) relativ zueinander in einer Transversalrichtung bezüglich der Längsrichtung relativ zueinander verschieben.
  3. Wärmetauscher nach einem der vorhergehenden Ansprüche, wobei die modularen Elemente (10) der Abdeckung (9) aus kuppelförmigen Elementen bestehen, die so angeordnet sind, dass sie einander zumindest teilweise überlappen.
  4. Wärmetauscher nach einem der vorhergehenden Ansprüche, wobei die modularen Elemente (10) der Abdeckung (9) mit einer Mehrzahl von Aufnahmen (14) versehen sind, die eine oder mehrere Trennwände (15) entnehmbar aufnehmen.
  5. Wärmetauscher nach Anspruch 4, wobei die Trennwände (15) eine oder mehrere Ausnehmungen aufweisen, die ausgebildet sind, um zumindest einen Abschnitt der Rohre (1) aufzunehmen.
  6. Wärmetauscher nach Anspruch 4 oder 5, wobei die Trennwände (15) zumindest eine zweite Öffnung (17) aufweisen.
  7. Wärmetauscher nach einem der vorhergehenden Ansprüche, wobei die modularen Elemente (10, 18) aus einem polymeren Material bestehen.
  8. Wärmetauscher nach einem der vorhergehenden Ansprüche, wobei die modularen Elemente (10) der Abdeckung (9) mit den modularen Elementen (18) des Trägers (5) lösbar verbunden sind.
  9. Wärmetauscher nach einem der vorhergehenden Ansprüche, wobei Dichtungseinrichtungen (20) um den Endbereich (7, 8) der Rohre herum angebracht sind.
  10. Wärmetauscher nach Anspruch 9, wobei die Dichtungseinrichtungen (20) zwischen dem Träger (5) und der Abdeckung (9) angeordnet sind und eine Mehrzahl von modularen Abschnitten (21) aufweisen, deren Länge größer oder gleich groß wie die Länge der modularen Elemente (10, 18) ist.
  11. Wärmetauscher nach einem der vorhergehenden Ansprüche, wobei eine dünne Verstärkungsplatte (22) mit dem Träger (5) verbunden ist, wobei die dünne Verstärkungsplatte (22) mit einer Mehrzahl von dünnen Öffnungen (23) versehen ist, die sich an Positionen befinden, die denen der ersten Öffnungen (6) entsprechen.
  12. Wärmetauscher nach Anspruch 11, wobei die dünne Verstärkungsplatte (22) aus Metall besteht.
  13. Wärmetauscher nach Anspruch 11 oder 12, wobei die dünne Verstärkungsplatte (22) zwischen dem Träger (5) und der Abdeckung (9) angeordnet ist.
  14. Wärmetauscher nach Anspruch 11 oder 12, wobei die dünne Verstärkungsplatte (22) an dem Träger (5) auf der entgegengesetzten Seite relativ zur Abdeckung (9) angebracht ist.
  15. Wärmetauscher nach einem der vorhergehenden Ansprüche, wobei die Rohre (1) einen Querschnitt von runder oder ovaler Gestalt aufweisen und in einer Anzahl von Reihen angeordnet sind, die zwischen 3 und 5 beträgt.
EP09150708A 2008-02-29 2009-01-16 Wärmetauscher mit modularen böden Active EP2096399B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000018A ITPN20080018A1 (it) 2008-02-29 2008-02-29 "scambiatore di calore con testate componibili"

Publications (2)

Publication Number Publication Date
EP2096399A1 EP2096399A1 (de) 2009-09-02
EP2096399B1 true EP2096399B1 (de) 2011-03-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP09150708A Active EP2096399B1 (de) 2008-02-29 2009-01-16 Wärmetauscher mit modularen böden

Country Status (4)

Country Link
EP (1) EP2096399B1 (de)
AT (1) ATE502272T1 (de)
DE (1) DE602009000868D1 (de)
IT (1) ITPN20080018A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU200074U1 (ru) * 2019-04-22 2020-10-05 Денис Николаевич Хазиев Теплообменник для водогрейного котла

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2214875B1 (de) * 1973-01-20 1976-09-17 Sueddeutsche Kuehler Behr
FR2611881B1 (fr) * 1987-03-04 1990-06-22 Chausson Usines Sa Echangeur de chaleur a deux passes methodiques dont les tubes sont relies a une plaque collectrice par des douilles elastiques
JPH04268199A (ja) * 1991-02-25 1992-09-24 Nippondenso Co Ltd 熱交換器
US5123482A (en) * 1991-11-14 1992-06-23 Wynn's Climate Systems, Inc. Oval tube heat exchanger
DE19917521B4 (de) 1999-04-17 2004-10-21 Forschungszentrum Karlsruhe Gmbh Vorrichtung zum Erwärmen eines Fluids
JP2000304488A (ja) 1999-04-23 2000-11-02 Calsonic Kansei Corp アルミニウム合金製熱交換器
DE10057190A1 (de) * 2000-11-17 2002-05-23 Modine Mfg Co Wärmetauscher
JP3812487B2 (ja) * 2002-04-16 2006-08-23 株式会社デンソー 熱交換器
JP4120611B2 (ja) * 2004-04-08 2008-07-16 株式会社デンソー 冷媒蒸発器

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Publication number Publication date
DE602009000868D1 (de) 2011-04-28
EP2096399A1 (de) 2009-09-02
ITPN20080018A1 (it) 2009-09-01
ATE502272T1 (de) 2011-04-15

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