EP1098156B1 - Gas-Flüssigkeitswärmetauscher und Verfahren zu dessen Herstellung - Google Patents

Gas-Flüssigkeitswärmetauscher und Verfahren zu dessen Herstellung Download PDF

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Publication number
EP1098156B1
EP1098156B1 EP99830630A EP99830630A EP1098156B1 EP 1098156 B1 EP1098156 B1 EP 1098156B1 EP 99830630 A EP99830630 A EP 99830630A EP 99830630 A EP99830630 A EP 99830630A EP 1098156 B1 EP1098156 B1 EP 1098156B1
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EP
European Patent Office
Prior art keywords
fins
tubular conduits
heat exchanger
gas
conduit
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
EP99830630A
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English (en)
French (fr)
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EP1098156A1 (de
Inventor
Rocco Giannoni
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GIANNONI SpA
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GIANNONI SpA
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 to AT99830630T priority Critical patent/ATE201761T1/de
Application filed by GIANNONI SpA filed Critical GIANNONI SpA
Priority to DE69900133T priority patent/DE69900133T2/de
Priority to ES99830630T priority patent/ES2158731T3/es
Priority to PT83303737T priority patent/PT1098156E/pt
Priority to EP99830630A priority patent/EP1098156B1/de
Priority to KR1020000058484A priority patent/KR100764859B1/ko
Priority to JP2000307815A priority patent/JP2001165588A/ja
Priority to TR200100646A priority patent/TR200100646A3/tr
Publication of EP1098156A1 publication Critical patent/EP1098156A1/de
Application granted granted Critical
Publication of EP1098156B1 publication Critical patent/EP1098156B1/de
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
    • F28D1/06—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 the heat-exchange conduits forming part of, or being attached to, the tank containing the body of fluid
    • 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
    • F28F1/24—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 and extending transversely
    • F28F1/32—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 and extending transversely the means having portions engaging further tubular elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • F24H1/41—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes in serpentine form
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag
    • F28D7/082—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration
    • F28D7/085—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration in the form of parallel conduits coupled by bent portions
    • F28D7/087—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration in the form of parallel conduits coupled by bent portions assembled in arrays, each array being arranged in the same plane
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00—Fins
    • F28F2215/12—Fins with U-shaped slots for laterally inserting conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/12—Fastening; Joining by methods involving deformation of the elements
    • F28F2275/125—Fastening; Joining by methods involving deformation of the elements by bringing elements together and expanding

Definitions

  • the present invention relates to a gas-liquid heat exchanger which is preferably but not exclusively employed in water heating apparatuses intended for both domestic use and utilization in residential areas.
  • the present invention also relates to a method for manufacturing a heat exchanger, as well as to a water heating apparatus incorporating a heat exchanger.
  • tube heat exchangers are known, optionally provided with fins to increase the gas-liquid heat exchange efficiency, of the type comprising a housing shell, wherein are defined a gas flowpath extending along a transversal direction of the same and a hydraulic circuit comprising a plurality of tubular conduits for liquid circulation, extending in said shell along a direction, which is substantially perpendicular to the direction of the gas flow.
  • European Patent application EP 0 831 281 describes a heat exchanger, wherein a plurality of unfinned tubes are housed between a pair of manifolds for distributing and- collecting the liquid, to which manifolds the free end portion of each tube is connected.
  • the gas-water heat exchangers of the prior art have a manufacturing cost which can not be further reduced owing to the manufacture and labor costs related to the need of providing a set of fittings between the tubular conduits and/or the ends thereof and the liquid distribution and collection manifolds, of assembling together the various parts of heat exchanger and lastly of rendering the same integral with each other.
  • a heat exchanger comprising a plurality of fins having slots and U-seats for housing a tubular conduit is disclosed in US-A-1 972 706.
  • the fins are assembled by pouring melting metal into the U-seat through the slots formed in the fin elements.
  • a reinforcing rib extending longitudinally along the. Unit is provided between and united to the opposite edges of the slots.
  • US-A-3 433 300 shows a method for manufacturing a heat exchanger with a tubular conduit forming a coil which is inserted transversely into U-seats formed in the edge portions of the fins. Nevertheless, the slots formed in the U-seats for inserting the tubes let the gas flowing through the fins pass through them, which lowers the efficiency of the heat exchanger.
  • the technical problem underlying the present invention is, therefore, that of providing a gas-liquid heat exchanger having a lower cost with respect to the heat exchangers of the prior art having the same heating capacity, and showing at the same time features of reduced size and high heat exchange efficiency as required by the Standards adopted by the market.
  • the Applicant has, in fact, found out that the desired further cost reduction of manufacture of the heat exchanger may be achieved -obtaining a heat exchange efficiency which is substantially comparable with that of the most expensive heat exchangers of the prior art having a similar thermal capacity - thanks to the following measures:
  • the gas passages defined between the fins extending from the tubular conduits are extending in the exchanger along a direction which is substantially perpendicular to the same tubular conduits, which are consequently transversally touched upon by the gas phase.
  • tubular conduits are parallel with each other and may lie both in the same plane or lie alternatively in parallel planes so as to have an alternation of staggered conduits which further reduces the width of the heat exchanger.
  • the distance between these parallel planes can be established by an expert of the field to avoid interferences between the fins extending from adjacent conduits.
  • the fins are laterally connected with each other downstream of the tubular conduits by a couple of lips extending perpendicularly from each fin for a predetermined length along an end portion of the seat housing the tubular conduits.
  • Said lips have a predetermined suitable width capable to achieve a physical connection between a fin and the immediately adjacent one along the longitudinal direction of the heat exchanger.
  • the width of the lips is comprised between 1 and 8 mm and, more preferably, between 3 and 6 mm.
  • 'width' of a fin element is intended to indicate the extension of such element along a direction which is substantially perpendicular to the body of the same fin (i.e. substantially parallel to the longitudinal axis of tubular conduits).
  • said lips may be integrally formed in the fins by a conventional mass-production pressing operation to the full advantage of the desired reduction of production costs of the exchanger.
  • the fins may be laterally connected downstream of the tubular conduits by means of rectangular metal foils having an appropriate width or by means of U-shaped channels having a conveniently reduced thickness, inserted into the free space existing downstream of the tubular conduits and housed in the end portion of the housing seats of the same conduits.
  • the housing seat of the tubular conduits is at least partly peripherally provided with a collar extending perpendicularly to the fin for a predetermined length.
  • the collar is extending perpendicularly to the fin for a portion which is substantially equal to the length of a bottom portion of the housing seat of the tubular conduits.
  • said collar may have a width equal to or minor than that of the lips adapted to laterally connect the fins.
  • the collar has a width lower than the width of the lips which connect adjacent fins with each other, which is conveniently comprised between 1.5 and 5.5 mm, and is advantageously integrally formed with said lips, to which is coupled without interruption.
  • the fins are also package-connected laterally and at opposite portions of the tubular conduits by means of a couple of side walls perpendicularly extending from the opposite ends of the same fins.
  • said side walls have a predetermined width adapted to allow a physical connection between a fin and the one which is immediately adjacent along the longitudinal direction of the heat exchanger.
  • these gas passages are defined once the fins have been stably associated to the tubular conduits and, as described above, are extending along a direction which is substantially perpendicular to the longitudinal axis of the same tubular conduits.
  • the heat exchanger of the invention comprises suitable means for spacing the fins in a pitchwise manner, which means may be advantageously constituted by the aforementioned collars, lips or by appropriate spacers eventually integrally formed in the same fins.
  • Said means advantageously allows to define the width of said gas passages so as to achieve the desired fluid dynamics properties of gas flow which is crossing the heat exchanger.
  • the pitch between the fins may be selected by a skilled man in the art depending upon the pressure drop and the fluid dynamics properties of the gas flow which are required.
  • this inclination may preferably assume with respect to the body of the fins an angular value ( ⁇ 1 ) comprised between 90° and 105° as to the lips and an angular value comprised between 80° and 105° as to the side walls.
  • the lips and/or the side walls of the fins form an angle ( ⁇ 1 and ⁇ 2 ) comprised between 96° and 100° with respect to the body of the fins, that is, they are substantially flared.
  • the regulation of the pitch between the fins allows in turn to conveniently regulate the efficiency of the heat exchanger, which is substantially proportional to the number of fins, by bringing the latter to the desired value.
  • the fins are provided with a plurality of substantially U-shaped seats each adapted to house one tubular conduit.
  • the latter may be provided with at least one rib, formed between the housing seats of adjacent tubular conduits, and adapted to increase the turbulence of the gas flowing into the gas passages defined between adjacent fins.
  • the heat exchanger further comprises a couple of quick-connecting pipe fittings associated with the opposite free ends of the substantially coil-shaped conduit.
  • the present invention relates to a water heating apparatus, for example a boiler, which is characterized in that it comprises a heat exchanger of the type described above.
  • the present invention relates to a method for manufacturing a gas-liquid heat exchanger of the type described above as defined in appended claim 10.
  • the said method allows to manufacture the gas-liquid heat exchanger of the present invention by means of mass-production operating steps and with a minimum manpower intervention therefore achieving the desired cost reduction of the heat exchanger.
  • the radial compression and expansion steps of the tubular conduits are carried out by means of cold plastic deformation using conventional equipment.
  • the step of stably associating the fins with the tubular conduits is carried out by means of a conventional braze welding using known equipments and techniques.
  • the method of the invention may comprise the additional step of associating a couple of quick-connecting pipe fittings to the opposite ends of the conduit in which the liquid flowpath is defined.
  • numeral 1 generally indicates a gas-water heat exchanger for water heating apparatuses, in particular for use as heat exchanger for heating primary warm water or water for room heating of a boiler 6 of conventional type schematically illustrated in Figure 9 and hereinafter described.
  • the heat exchanger 1 comprises a plurality of tubular conduits 2, substantially rectilinear, having a longitudinal axis x-x extending along a first predetermined direction and wherein a flowpath 3 for the water circulation in the exchanger 1 is defined.
  • a plurality of fins 4 substantially parallel and pitchwise spaced with respect to each other are extending outwardly of the tubular conduits 2, to which are stably associated for example by braze welding and are packed between closing plates 20, 21 associated with the tubular conduits 2 at opposite ends of the heat exchanger 1.
  • the fins 4 are made of a suitable metal having good thermal conductivity properties such as copper.
  • the gas flowing through the exchanger 1 in the gas passages 5 is essentially constituted by combustion gases coming from a burner 7 of the boiler 6 ( Figure 9).
  • the tubular conduits 2 are essentially constituted by successive portions of a single substantially coil-shaped conduit 8, which portions are connected to each other by means of connecting elbows 9 integrally formed in the same conduit 8.
  • the conduit 8 is also made of a suitable metal having good properties of thermal conductivity, such as for example copper.
  • the conduit 8 is provided at its opposite ends 8a, 8b with respective quick-connecting fittings 10a, 10b, in this example integrally formed at the same ends, adapted to facilitate the connecting operations with the hydraulic circuit of the boiler 6.
  • the fins 4 of the exchanger 1 comprise a suitably plate-shaped body 11 having an appropriate reduced thickness, for example comprised between 0.2 and 0.7 mm.
  • the body 11 of the fins 4 is provided with a plurality of seats 12, which are substantially U-shaped, for housing the tubular conduits 2.
  • Each of the seats 12 comprises:
  • the end portion 12b of the seat 12 is defined, in particular, between essentially rectilinear portions of opposite branches of the substantially U-shaped seat 12 and formed in the body 11 of the fin 4 ( Figure 2).
  • the fins 4 are laterally connected with each other downstream of the tubular conduits 2 by means of a couple of lips 13a,b extending perpendicularly to each fin 4 substantially for the whole length of the second portion 12b of the seat 12.
  • the lips 13a,b are integrally formed in the fins 4 and have a width 'l s ' equal to about 4 mm adapted to physically connect a fin 4 and the fin which is immediately adjacent along a direction which is parallel to the longitudinal axis x-x of the tubular conduits 2, which in this case coincides with the longitudinal direction of the exchanger 1.
  • the bottom portion 12a of the seat 12 is peripherally provided with a collar 14 extending perpendicularly to the fin 4 for a length which is substantially equal to the length of such a bottom portion, in this case substantially coinciding with the contact zone between the fin 4 and the tubular conduits 2.
  • the collar 14 has a width 'l c ' equal to about 2 mm and is advantageously integrally formed with the lips 13a,b to which is connected without interruption.
  • the fins 4 of the exchanger 1 are also pack-connected with each other laterally and at opposite parts of the tubular conduits 2 by means of a couple of side walls 15a,b extending perpendicularly to opposite ends 4a,b of the fins 4.
  • the side walls 15a, b have a predetermined width adapted to allow a physical connection between a fin and the one which is immediately adjacent along a direction which is parallel to the longitudinal axis x-x of the tubular conduits 2, which in such a case coincides with the longitudinal direction of the exchanger 1.
  • the width 'l p ' of the side walls 15a,b is slightly higher than that of the lips 13a,b and is equal to about 5 mm.
  • the gas passages 5 defined between the fins 4 are substantially laterally closed in a gas tight manner so as to avoid undesirable gas by-passes into the free space existing downstream of the tubular conduits 2 (second portion 12b of the seat 12) and also to optimize the fluid dynamics of the gas flowing through the same.
  • the lips 13a,b and the side walls 15a, b of the fins 4 are suitably pitchwise spaced with one another so as to define an appropriate width of the gas passages 5 and to achieve the desired fluid dynamics properties of the gas which crosses the heat exchanger.
  • the pitch between the fins 4 is in this embodiment equal to about 3.2 mm.
  • the lips 13a,b and the side walls 15a, b of the fins 4 have a predetermined inclination with respect to the body 11 of the fins 4 with which they form angles ⁇ 1 , ⁇ 2 each equal to about 98.5°.
  • the fins 4 are also provided with a couple of substantially hemispherical ribs 16, 17 integrally formed in the body 11 between the housing seats 12 of adjacent tubular conduits 2.
  • the ribs 16, 17 are integrally extending from the body 11 of the fin 4 on the same side of the lips 13a,b and side walls 15a,b.
  • the coil-shaped conduit 8 is provided by conventional operations of plastic deformation starting from a rectilinear conduit having an appropriate length.
  • conduit 8 In the conduit 8 are thus defined the substantially rectilinear tubular conduits 2 which are connected with each other by the connecting elbows 9 integrally formed in the conduit 8.
  • the quick-connecting pipe fittings 10a,b are associated with or, preferably, integrally formed at the opposite ends 8a,b of the conduit 8 before or after said step of providing the tubular conduits 2.
  • tubular conduits 2 are laterally compressed for a portion of predetermined length so as to form in said portion opposite rectified sides 2a,b which are substantially parallel with each other.
  • such a rectification step may be carried out by means of cold plastic deformation equipment of conventional type, such as for example a press provided with a plurality of conveniently shaped jaws 18, between which abutting inserts 19 are positionable in a removable manner.
  • cold plastic deformation equipment of conventional type, such as for example a press provided with a plurality of conveniently shaped jaws 18, between which abutting inserts 19 are positionable in a removable manner.
  • a plurality of fins 4 which are pitchwise spaced with respect to each other thanks to the partial overlapping of the lips 13a,b and of the side walls 15a,b is inserted onto the partially rectified portions of the tubular conduits 2.
  • the end portion 12b and the lips 13a,b constitute as many means for the guided sliding of the tubular conduits 2 adapted to facilitate the correct positioning of the latter in the bottom portion 12a of the seat 12 which is designed for their final housing.
  • the lateral expansion of the opposite sides 2a,b of the rectified portions of the tubular conduits 2 is carried out so as to impart to the sides 2a,b a shape substantially mating with that of the bottom portion 12a of the seat 12.
  • this lateral expansion step of the tubular conduits 2 is carried out by means of plastic deformation, for example by hydroforming operations carried out by means of conventional equipment known in the art.
  • the fins 4 package-mounted on the tubular conduits 2 are permanently associated to the latter - after having inserted the closing plates 20 and 21 (if present) - by conventional braze welding operations, for example carried out into a furnace at a temperature comprised between 700° and 800° employing metal alloys suitable for the purpose such as for example copper/phosphorus alloys.
  • Said boiler is a boiler of the so-called combined type and comprises a combustion module 22, in which are conventionally supported the burner 7 and the gas-water heat exchanger 1, which is transversally crossed by combustion gases G which are later evacuated through an exhaust hood 23.
  • the boiler 6 also comprises a primary hydraulic circuit 24 for the circulation of primary warm water or water for room heating comprising in turn:
  • the primary hydraulic circuit 24 comprises a conduit 32 for the recirculation of the primary water which has flown through the secondary exchanger 31 back to the feeding conduit 25 of the primary exchanger 1 as well as an expansion tank 33 having the task of compensating the heat expansion of the primary water.
  • the boiler 6 also comprises a secondary hydraulic circuit 34 for the circulation of sanitary warm water comprising in turn:
  • the boiler 6 comprises a conduit 38 for feeding a suitable gas fuel, for example, methane gas to the burner 7 and a valve 38 having the task of intercepting the conduit 38 and thereby adjusting the gas flow rate fed to the same burner.
  • a suitable gas fuel for example, methane gas
  • conduits 25, 29, 35, 36, 37 are provided with respective fittings 25', 29', 35', 36' and 37' adapted to allow their connection respectively to the room heating plant, to the water network, to the sanitary water tapping points and to the gas distribution network.
  • the gas phase G - in this case constituted by the combustion gases generated by the burner 7 of the boiler 9 - flows with an ascending motion from bottom upwards along the y-y direction in the gas passages 5 defined between the fins 4.
  • the combustion gases can not by-pass the gas passages 5 and leave the exchanger 1 only after having entirely crossed the latter, effectively transmitting part of their own sensible heat to the fins 4.
  • a portion of the heat transmitted to the fins 4 is in turn conveyed by the latter, essentially by conduction, to the water for space heating which flows in the liquid flowpath 3 defined in the conduit 8, water which is therefore heated at the desired temperature.
  • the Applicant After a plurality of repeated tests carried out with the exchanger 1 according to the invention, the Applicant has found out that the exchanger is capable to reach a heat exchange efficiency comparable to that of the known heat exchangers having an equal heating capacity, even if the present exchanger has a cost which is much lower than the exchangers of the prior art.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Details Of Fluid Heaters (AREA)

Claims (13)

  1. Gas-Flüssigkeits-Wärmetauscher, der folgendes aufweist:
    eine Vielzahl von im wesentlichen geradlinigen rohrförmigen Leitungen (2), die im wesentlichen aus aufeinanderfolgenden Bereichen einer einzigen Leitung (8) bestehen, die durch in der Leitung (8) integral geformte Verbindungskrümmer (9) miteinander verbunden sind; wobei die rohrförmigen Leitungen (2) eine Längsachse (X-X) haben, die sich entlang einer ersten vorbestimmten Richtung erstreckt, in der eine Strömungsbahn (3) für den Flüssigkeitskreislauf in dem Wärmetauscher (1) gebildet ist;
    eine Vielzahl von Rippen (4), die im wesentlichen parallel zueinander angeordnet sind und die als Baueinheit an den rohrförmigen Leitungen (2) angebracht sind und einen plattenförmigen Körper aufweisen, der mit mindestens einem im wesentlichen U-förmigen Sitz (12) versehen ist, der folgendes aufweist:
    i) einen ersten Bereich (12a), der eine Gestalt hat, die mit der Gestalt der rohrförmigen Leitungen (2) im wesentlichen zusammenpaßt und der so ausgebildet ist, daß er die rohrförmigen Leitungen (2) aufnimmt, und
    ii) einen zweiten Bereich (12b), der an der Abstromseite der rohrförmigen Leitungen (2) in bezug auf einen Gasstrom, der im Gebrauch den Wärmetauscher quert, offen ist, wobei der zweite Bereich (12b) zwischen gegenüberliegenden Zweigen des im wesentlichen U-förmigen Sitzes (12) gebildet ist;
    wobei die Rippen (4) eine Vielzahl von Gaspassagen (5) bilden, die es im Gebrauch ermöglichen, daß Gas entlang einer zweiten Richtung (Y-Y) im wesentlichen senkrecht zu der Längsachse (X-X) der rohrförmigen Leitungen (2) strömt;
    wobei die Rippen (4) an dem zweiten Bereich (12b) des Sitzes (12) seitlich miteinander verbunden sind, so daß eine im wesentlichen durchgehende schließende Wand erhalten wird, die Gasumleitungen in den zweiten Bereich (12b) verhindern kann.
  2. Wärmetauscher nach Anspruch 1,
    wobei die Rippen (4) an dem zweiten Bereich (12b) des Sitzes (12) zur Aufnahme der rohrförmigen Leitungen (2) vorgesehen sind, wobei sich ein Paar von Lippen (13a, 13b) senkrecht zu der Rippe (4) über einen Bereich vorbestimmter Länge entlang dem zweiten Bereich (12b) des Sitzes (12) erstreckt und eine vorbestimmte Breite hat und wobei die Rippen (4) an der Abstromseite der rohrförmigen Leitungen (2) durch die Lippen (13a, 13b) seitlich miteinander verbunden sind.
  3. Wärmetauscher nach Anspruch 2,
    wobei der Sitz (12) zur Aufnahme der rohrförmigen Leitung (2) zumindest teilweise am Umfang mit einem Kragen (14) versehen ist, der sich senkrecht zu der Rippe (4) erstreckt und eine vorbestimmte Breite hat, wobei der Kragen (14) mit den Lippen (13a, 13b) verbunden und damit integral ausgebildet ist.
  4. Wärmetauscher nach einem der Ansprüche 1 bis 3,
    wobei die Rippen (4) an gegenüberliegenden Bereichen mit einem Paar von Seitenwänden (15a, 15b) versehen sind, die sich senkrecht zu den Rippen (4) erstrecken und eine vorbestimmte Breite haben und wobei die Rippen (4) an gegenüberliegenden Bereichen der rohrförmigen Leitungen (2) durch die Seitenwände (15a, b) seitlich miteinander verbunden sind.
  5. Wärmetauscher nach Anspruch 1,
    der ferner eine Einrichtung aufweist, um die Rippen (4) relativ zueinander im gleichen Abstand zu halten.
  6. Wärmetauscher nach Anspruch 4,
    wobei die Lippen (13a, 13b) der Rippen (4) einen Winkel (α1) bilden, der in bezug auf den Körper der Rippen (4) zwischen 90° und 105° liegt, und
    wobei die Seitenwände (15a, 15b) einen Winkel (α2) bilden, der in bezug auf den Körper der Rippen (4) zwischen 80° und 105° liegt.
  7. Wärmetauscher nach Anspruch 1,
    wobei die Rippen (4) mit mindestens einem Vorsprung (16, 17) versehen sind, der zwischen den Sitzen (12) in dem Körper (11) der Rippen (4) ausgebildet ist, um die Verwirbelung des in die Gaskanäle (5) strömenden Gases zu erhöhen.
  8. Wärmetauscher nach Anspruch 1,
    der ferner ein Paar von Schnellanschlußstücken (10a, 10b) aufweist, die gegenüberliegenden Enden der Leitung (8) zugeordnet sind.
  9. Warmwasserbereiter, der einen Wärmetauscher nach einem der Ansprüche 1 bis 8 aufweist.
  10. Verfahren zum Herstellen eines Gas-Flüssigkeits-Wärmetauschers nach Anspruch 1,
    das die folgenden Schritte aufweist:
    Vorsehen einer Leitung (8) mit einer vorbestimmten Länge, die aus einer Vielzahl von zylindrischen, im wesentlichen geradlinigen rohrförmigen Leitungen (2) besteht, die durch in der Leitung (8) integral geformte Verbindungskrümmer (9) miteinander verbunden sind;
    seitliches Pressen der zylindrischen rohrförmigen Leitungen (2) entlang einem Bereich vorbestimmter Länge, um in dem Bereich zugerichtete gegenüberliegende Seiten (2a, 2b) zu formen, die im wesentlichen parallel zueinander sind;
    Einsetzen der so erhaltenen teilweise zugerichteten Bereiche in eine Vielzahl von Rippen (4), die einen plattenförmigen Körper aufweisen, der mit mindestens einem im wesentlichen U-förmigen Sitz (12) versehen ist, der folgendes aufweist:
    i) einen ersten Bereich (12a), der eine Gestalt hat, die mit der Gestalt der rohrförmigen Leitungen (2) im wesentlichen zusammenpaßt, und der so ausgebildet ist, daß er die zylindrischen rohrförmigen Leitungen (2) aufnimmt, und
    ii) einen zweiten Bereich (12b), der an der Abstromseite der rohrförmigen Leitungen (2) in bezug auf einen Gasstrom, der den Wärmetauscher quert, offen ist, wobei der zweite Bereich (12b) zwischen gegenüberliegenden Zweigen des im wesentlichen U-förmigen Sitzes (12) gebildet ist, wobei der zweite Bereich (12b) mit einem Paar von Lippen (13a, 13b) versehen ist, die eine vorbestimmte Breite haben und sich über eine vorbestimmte Länge des zweiten Bereichs (12b) senkrecht zu der Rippe (4) erstrecken;
    seitliches Aufweiten der zugerichteten gegenüberliegenden Seiten (2a, 2b) der Bereiche, um den Bereichen einen im wesentlichen elliptischen Querschnitt zu geben, der eine Gestalt hat, die mit der Gestalt des ersten Bereichs (12a) der in den Rippen (4) ausgebildeten Gehäusesitze (12) im wesentlichen zusammenpaßt;
    Anbringen der Rippen (4) an den rohrförmigen Leitungen (2) in einer stabilen Weise.
  11. Verfahren nach Anspruch 10,
    wobei die Schritte des Zusammendrückens und des seitlichen Aufweitens der rohrförmigen Leitungen (2) durch plastische Verformung ausgeführt werden.
  12. Verfahren nach Anspruch 10,
    wobei der Schritt des stabilen Anbringens der Rippen (4) an den rohrförmigen Leitungen (2) durch Lötschweißen ausgeführt wird.
  13. Verfahren nach Anspruch 10,
    das ferner den Schritt des Anbringens eines Paars von Schnellanschlußstücken (10a, 10b) an den gegenüberliegenden Enden (8a, 8b) der Leitung (8) aufweist.
EP99830630A 1999-10-07 1999-10-07 Gas-Flüssigkeitswärmetauscher und Verfahren zu dessen Herstellung Expired - Lifetime EP1098156B1 (de)

Priority Applications (8)

Application Number Priority Date Filing Date Title
DE69900133T DE69900133T2 (de) 1999-10-07 1999-10-07 Gas-Flüssigkeitswärmetauscher und Verfahren zu dessen Herstellung
ES99830630T ES2158731T3 (es) 1999-10-07 1999-10-07 Intercambiador de calor gas-liquido y procedimiento de fabricacion del mismo.
PT83303737T PT1098156E (pt) 1999-10-07 1999-10-07 Permutador de calor gas-liquido e metodo para o seu fabrico
EP99830630A EP1098156B1 (de) 1999-10-07 1999-10-07 Gas-Flüssigkeitswärmetauscher und Verfahren zu dessen Herstellung
AT99830630T ATE201761T1 (de) 1999-10-07 1999-10-07 Gas-flüssigkeitswärmetauscher und verfahren zu dessen herstellung
KR1020000058484A KR100764859B1 (ko) 1999-10-07 2000-10-05 기액 열교환기 및 그 제조방법
JP2000307815A JP2001165588A (ja) 1999-10-07 2000-10-06 気体−液体熱交換器およびその製造法
TR200100646A TR200100646A3 (tr) 1999-10-07 2001-02-28 Gaz-sivi isi esanjörü ve bu esanjörün imalati için yöntem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP99830630A EP1098156B1 (de) 1999-10-07 1999-10-07 Gas-Flüssigkeitswärmetauscher und Verfahren zu dessen Herstellung

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EP1098156A1 EP1098156A1 (de) 2001-05-09
EP1098156B1 true EP1098156B1 (de) 2001-05-30

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KR (1) KR100764859B1 (de)
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ES (1) ES2158731T3 (de)
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Publication number Publication date
KR100764859B1 (ko) 2007-10-09
ATE201761T1 (de) 2001-06-15
DE69900133T2 (de) 2002-03-07
EP1098156A1 (de) 2001-05-09
JP2001165588A (ja) 2001-06-22
KR20010040006A (ko) 2001-05-15
ES2158731T3 (es) 2001-09-01
DE69900133D1 (de) 2001-07-19
PT1098156E (pt) 2001-11-30

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