EP1255085B1 - Echangeur de chaleur avec plusieurs enroulements et méthode pour fabriquer l'échangeur de chaleur - Google Patents

Echangeur de chaleur avec plusieurs enroulements et méthode pour fabriquer l'échangeur de chaleur Download PDF

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Publication number
EP1255085B1
EP1255085B1 EP02009720A EP02009720A EP1255085B1 EP 1255085 B1 EP1255085 B1 EP 1255085B1 EP 02009720 A EP02009720 A EP 02009720A EP 02009720 A EP02009720 A EP 02009720A EP 1255085 B1 EP1255085 B1 EP 1255085B1
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EP
European Patent Office
Prior art keywords
heat exchanger
heating coil
radially
heating coils
exchanger according
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
EP02009720A
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German (de)
English (en)
Other versions
EP1255085A2 (fr
EP1255085A3 (fr
Inventor
Gerhard Matt
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.)
Alto Deutschland GmbH
Original Assignee
Alto Deutschland GmbH
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Filing date
Publication date
Application filed by Alto Deutschland GmbH filed Critical Alto Deutschland GmbH
Publication of EP1255085A2 publication Critical patent/EP1255085A2/fr
Publication of EP1255085A3 publication Critical patent/EP1255085A3/fr
Application granted granted Critical
Publication of EP1255085B1 publication Critical patent/EP1255085B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • 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
    • F28D7/02—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 helically coiled
    • F28D7/024—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 helically coiled the conduits of only one medium being helically coiled tubes, the coils having a cylindrical configuration
    • 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
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/14—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
    • F24H1/16—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form helically or spirally coiled
    • F24H1/165—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form helically or spirally coiled using fluid fuel

Definitions

  • the invention relates to a heat exchanger with a plurality of heating coils and method for producing the heat exchanger according to the preamble of the independent claims.
  • EP 0 971 194 A2 A heat exchanger has become known from EP 0 971 194 A2, which is based on the same Applicant.
  • the disclosure of said EP 0 971 194 A2 is intended to be included in full content of the disclosure of the present application. With regard to the function and structure of the heat exchanger according to the invention, reference is therefore initially made to the disclosure of EP 0 971 194 A2.
  • the radially inward heating flow is formed between the inner heating coil and the outer heating coil, which is known to form a helical path for this inner heating current, such that certain heating coils of the inner structure are made larger in diameter to communicate with the radially outer heating coils to provide a spirally rising flow path.
  • a high-pressure cleaning device with a heat exchanger which has a helical line through which the cleaning fluid flows, and this interior space is heated by a burner.
  • the height of the cylinder formed by the helical pipe is three times seven times the inside diameter of this cylinder.
  • a boiling boiler for non-boiling liquids has become known, with a plurality of heating coils, which are formed from spirally wound Edelrohrwindungen and mutually substantially coaxially arranged and radially spaced from each other and form an interior into which a burner head extends, wherein the Heating gases undergoes a flow deflection on a burner head opposite the baffle element, on the basis of which the hot gases then flows in at least one flow channel between the heating coils.
  • the heating coils are fluidly connected to each other via connecting pipes and at the respective free ends of the cold and hot water inlet is provided.
  • radial spacers between a radially inner heating coil and a radially outer heating coil webs which have in the contact surface to the radially outer heating coil and / or the radially inner heating coils corresponding to the pipe diameters formed recesses.
  • US 6,052,898 A discloses a method for manufacturing a heat exchanger, wherein first the radially inner heating coil is produced by winding on a mandrel, then spacers are applied to the outer periphery of the radially inner heating coil, subsequently the radially outer heating coil is produced by winding onto the spacers, and finally the mandrel is withdrawn from the interior of the inner heating coil.
  • the object of the present invention is the object of substantially improving the efficiency of such a heat exchanger.
  • Another object of the invention is to produce such a heat exchanger also simpler and cheaper.
  • the object is achieved with regard to the production of the heat exchanger according to the invention in that according to the invention in the production as a spacer webs between the inner heating coil and the outer heating coil web plates are used which are directed radially outward and which space the inner Schuwicklungsan extract of the outer Schuwicklungsan ever ,
  • Characteristic of the invention is that recesses of the web plates in the contact surface to the radially outer heating coil have different radial depths and that the turns of the radially outer heating coil are at least partially such baffle radially offset from each other that additional flow channels formed between the turns of the radially outer heating coil are, through which the hot gases can flow additionally.
  • These web plates are preferably evenly distributed on the outer circumference of the heat exchanger.
  • the inner heating coils are produced, which preferably have an approximately cylindrical and slightly tapered outer circumference overall. These inner heating windings thus form on their outer lateral surfaces a body whose lateral surface is approximately cylindrical and slightly conically widens upwards.
  • both the heating coils and the web plates are placed on separate potentials of a welding system and as soon as the web plates come into contact with the inner heating coils, it comes to the contact surface to a higher current density, which leads to an annealing of the adjacent parts, so that these parts connect to each other via said resistance welding.
  • each heating coil is important for each heating coil to be connected to the respective web plate by welding in order to ensure the heat transfer in this area.
  • the snakes of the outer heating coil are now not arranged vertically one above the other, but baffled to each other, so that always alternately one or more heating coils of the outer heating coil on an inner circumference and other snakes of the outer Heating coil are wound on a radially outer periphery.
  • the outer heating coil forms a vertically rising, baffle-like flow path for the hot gases, so that in this way an extraordinarily favorable heat transfer of the hot gases is granted to the outer heating coil.
  • the outwardly directed edge of the respective web plates different having shaped recesses which occupy recesses at different diameters relative to the longitudinal axis of the heat exchanger.
  • the outer heating coils of the outer heating coil are wound to different outer diameter of the recesses and thus they reach different and preferably alternately outer diameter. It will be sent chicane-like flow passages in the outer heating coil.
  • FIG. 1 schematically shows a stationary heat exchanger.
  • the heat exchanger according to Figure 1 consists essentially of a radially inner heating coil 2, which consists of a total of e.g. 31 heating coils is, and defines an approximately cylindrical interior 13.
  • This inner heating coil is placed on a base plate 1 and supported, which also serves as a baffle element for deflecting the hot gases.
  • an outer heating coil 3 is arranged radially outwardly.
  • the deflection takes place here in the region of the bottom plate. 1
  • the outer heating coils 3 are still arranged vertically one above the other, and they do not form an intermediate gap. So they form in this area a continuous wall to maintain the still existing heating flame in this area.
  • the two heating coils 2, 3 are connected to each other via the connecting pipes 7, 8 and in each case by connections 5, 6 with hot and cold water.
  • the cold water thus flows through the cold water connection 5 in the heat exchanger, flows through the radially inner heating coil 2 to the bottom plate 1 and enters this area already preheated in the radially outer heating coil 3, then flows through the heating coil 3 with further heating, and occurs via the hot water connection 6 again from the heat exchanger.
  • a reverse flow direction is possible, in which the cold water on the port 6 on and the hot water flows through the port 5.
  • the flow direction of the water is selected, wherein in the first case, the DC heat exchange prevails, in the second case, the countercurrent heat exchange.
  • the heating gas flows in the direction of arrow 10 in the flow channel 11 which is bounded by the inner heating windings 2 and the outer heating windings 3.
  • the efficiency of the heat exchanger according to the invention is thus substantially increased.
  • the respective web plate 4 is first applied to the outer circumference of the inner heating coil 2 and finished by the mentioned in the general part resistance welding at finished inner heating coil With a single operation, all welds 21 between the end edge 18 of the web plate 4 and the associated outwardly directed outer peripheries of the heating coils of the inner heating coil 2 are produced.
  • the rectilinear front edge 18 in the web plate 4 are correspondingly opposite recesses 15, 16, 17 assigned.
  • the recesses 15 are arranged relatively evenly one after the other to ensure the previously mentioned straight deflection path for the flame in the direction of arrow 9 in Figure 1.
  • recessed recesses 16 are alternately formed to elevated recesses 17 according to Figure 3 at this radially outer end edge of the web plate 4. This results in the radial displacement of the successive heating coils of the outer heating coil.
  • the invention is not limited to a straight succession of such recesses 16, 17. It can also be provided that e.g. two or three recesses 16 are followed one behind the other by in turn three recesses 17, so that the heating coils can also be arranged in groups.
  • the radially outer heating coil 3 may also be point-welded to the web plate 4 in the region of the recesses 15, 16, preferably by resistance welding by means of welded connections 22.
  • the invention thus relates to a heat exchanger with a plurality of heating coils and a method for producing this heat exchanger, which is used in particular for hot water preparation for high-pressure cleaner.
  • the heating coils are formed from approximately spirally wound Edelrohrwindungen and arranged mutually substantially coaxially and radially spaced from each other and form an interior in which a burner head and / or its heating flame or the combusting hot gases extends, wherein the heating gases flow deflection at a burner head experiences opposite baffle element, due to which the hot gases then flows in at least one flow channel between the heating coils.
  • the windings of the radially outer heating winding are at least partially arranged such a baffle-like radial offset from one another that additional flow channels between the windings the radially outer heating coil are formed, through which the heating gases can additionally flow, whereby the time for the heat transfer is extended.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • General Induction Heating (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Claims (16)

  1. Echangeur de chaleur avec plusieurs enroulements chauffants (2, 3), en particulier pour la préparation d'eau chaude pour des nettoyeurs à haute pression, lesquels enroulements chauffants (2, 3) sont formés à partir de tubes chauffants enroulés en spirale, sont disposés sensiblement coaxialement, avec un écartement radial, et définissent un espace intérieur (13) dans lequel entrent une tête de brûleur et/ou la flamme chauffante de celle-ci et les gaz de chauffage qui brûlent, étant précisé que les gaz de chauffage subissent une déviation d'écoulement au niveau d'un élément de chicane situé en face de la tête de brûleur, et passent ensuite, pour cette raison, dans au moins un conduit d'écoulement (11) entre les enroulements chauffants (2, 3), que les enroulements chauffants (2, 3) sont reliés pour l'écoulement de liquide par l'intermédiaire de tubes de liaison (7, 8) et l'arrivée d'eau froide et d'eau chaude (5, 6) est prévue aux extrémités libres, et qu'il est prévu comme écarteur radial entre l'enroulement chauffant radialement intérieur (2) et l'enroulement chauffant radialement extérieur (3) des ailettes (4) et que les ailettes (4) présentent dans la surface de contact avec l'enroulement radialement extérieur (3) et/ou avec l'enroulement radialement intérieur (2) des creux (15, 16) dont la forme est adaptée au diamètre des tubes, caractérisé en ce que les creux (15, 16) des ailettes (4) présentent dans la surface de contact avec l'enroulement radialement extérieur (3) différentes profondeurs radiales et en ce que les spires de l'enroulement chauffant radialement extérieur (3) sont au moins en partie décalées radialement à la manière de chicanes les unes par rapport aux autres, de manière à former entre elles des conduits d'écoulement supplémentaires (23) qui permettent un écoulement supplémentaire des gaz de chauffage.
  2. Echangeur de chaleur selon la revendication 1, caractérisé en ce que les spires de l'enroulement chauffant radialement intérieur (2) sont disposées les unes sur les autres sensiblement dans le sens axial.
  3. Echangeur de chaleur selon la revendication 1 ou 2, caractérisé en ce que les spires de l'enroulement radialement intérieur (2) sont sensiblement posées les unes sur les autres et ne forment pas de fente de passage entre elles.
  4. Echangeur de chaleur selon l'une des revendications 1 à 3, caractérisé en ce que les spires de l'enroulement chauffant radialement extérieur (3) sont sensiblement posées les unes sur les autres, dans la zone de l'élément de chicane, et ne forment pas de fente de passage entre elles.
  5. Echangeur de chaleur selon l'une des revendications 1 à 4, caractérisé en ce qu'il fonctionne en étant placé à la verticale, à l'horizontale ou incliné par rapport à la fondation.
  6. Echangeur de chaleur selon l'une des revendications 1 à 5, caractérisé en ce que la forme extérieure des enroulements chauffants (2, 3) est sensiblement cylindrique ou tronconique.
  7. Echangeur de chaleur selon l'une des revendications 1 à 6, caractérisé en ce qu'au moins deux des enroulements chauffants (2, 3) sont logés dans un boîtier commun.
  8. Echangeur de chaleur selon la revendication 7, caractérisé en ce que le boîtier commun, en section transversale, est rond et/ou polygonal.
  9. Echangeur de chaleur selon les revendications 1 à 8, caractérisé en ce que les enroulements chauffants (2, 3) et/ou l'un au moins des tubes de liaison (7, 8) sont disposés sur une plaque de base (1).
  10. Echangeur de chaleur selon la revendication 9, caractérisé en ce que la plaque de base (1) sert d'élément de chicane.
  11. Echangeur de chaleur selon les revendications 1 à 10, caractérisé en ce que les ailettes (4) se composent au moins partiellement d'une matière conductrice de chaleur.
  12. Echangeur de chaleur selon la revendication 11, caractérisé en ce que les ailettes (4) sont au moins en partie en contact conducteur de chaleur avec les enroulements chauffants radialement intérieurs (2) et/ou les enroulements chauffants radialement extérieurs (3).
  13. Echangeur de chaleur selon l'une des revendications 1 à 12, caractérisé en ce que les ailettes (4) sont au moins reliées par soudage aux enroulements chauffants radialement intérieurs (2) et/ou aux enroulements chauffants extérieurs (3).
  14. Echangeur de chaleur selon l'une des revendications 1 à 13, caractérisé en ce que les ailettes (4) s'étendent à peu près axialement par rapport aux enroulements chauffants (2, 3) et sont réparties à peu près régulièrement.
  15. Procédé pour fabriquer un échangeur de chaleur qui est formé selon l'une des revendications 1 à 14, selon lequel on exécute les étapes suivantes :
    a) on fabrique les enroulements chauffants radialement intérieurs (2) en les enroulant sur un mandrin conique, en particulier ;
    b) on applique les ailettes (4) sur la circonférence extérieure de l'enroulement chauffant radialement intérieur (2) ;
    c) on soude par points les ailettes (4) sur la circonférence extérieure de l'enroulement chauffant radialement intérieur (2), en réalisant en même temps toutes les soudures (21) par soudage par résistance ;
    d) on fabrique l'enroulement chauffant radialement extérieur (3) en l'enroulant sur les ailettes (4), sur la circonférence extérieure de l'enroulement radialement intérieur (2) ;
    e) on enlève le mandrin de l'espace intérieur (13) de l'enroulement radialement intérieur (2).
  16. Procédé selon la revendication 15, caractérisé en ce qu'on soude également les ailettes (4), au moins en partie, sur l'enroulement radialement extérieur (3).
EP02009720A 2001-05-04 2002-04-30 Echangeur de chaleur avec plusieurs enroulements et méthode pour fabriquer l'échangeur de chaleur Expired - Lifetime EP1255085B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10121805 2001-05-04
DE10121805A DE10121805A1 (de) 2001-05-04 2001-05-04 Wärmetauscher mit mehreren Heizwicklungen und Verfahren zur Herstellung des Wärmetauschers

Publications (3)

Publication Number Publication Date
EP1255085A2 EP1255085A2 (fr) 2002-11-06
EP1255085A3 EP1255085A3 (fr) 2003-10-08
EP1255085B1 true EP1255085B1 (fr) 2006-04-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP02009720A Expired - Lifetime EP1255085B1 (fr) 2001-05-04 2002-04-30 Echangeur de chaleur avec plusieurs enroulements et méthode pour fabriquer l'échangeur de chaleur

Country Status (4)

Country Link
EP (1) EP1255085B1 (fr)
AT (1) ATE322656T1 (fr)
DE (2) DE10121805A1 (fr)
DK (1) DK1255085T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012152313A1 (fr) 2011-05-10 2012-11-15 Alfred Kärcher Gmbh & Co. Kg Échangeur de chaleur et son procédé de fabrication

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10331209A1 (de) 2003-07-10 2005-02-03 Alto Deutschland Gmbh Wärmetauscher mit Keramikboden
CN107597894B (zh) * 2017-10-10 2024-03-01 苏州海陆重工股份有限公司 盘管整形装置
EP3719411A1 (fr) * 2019-04-02 2020-10-07 Nilfisk A/S Appareil de chauffage de liquide

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Publication number Priority date Publication date Assignee Title
US2998807A (en) * 1955-02-18 1961-09-05 Vapor Heating Corp Water tube boiler or steam generator
US3051146A (en) * 1955-02-18 1962-08-28 Vapor Heating Corp Water tube boiler or steam generator
DE1956940U (de) * 1963-09-13 1967-03-16 Todoroff K G Dr Zwangsumlaufkessel.
US3822675A (en) * 1972-03-28 1974-07-09 Nordalpina Anstalt Boiler for heating non-boiling heat transfer liquids
FR2191080B3 (fr) * 1972-06-28 1976-05-21 Wanson Constr Mat Therm
FR2313634A2 (fr) * 1975-06-03 1976-12-31 Brulfert Andre Chaudiere ou generateur de vapeur a combustion catalytique d'hydrocarbures
DE7602003U1 (de) * 1976-01-26 1978-01-12 Viessmann, Hans, 3559 Battenberg Gasheizkessel
ATE25606T1 (de) * 1980-05-16 1987-03-15 Molitor Ind Inc Verfahren zur herstellung eines waermetauschers mit mehreren rohren und wickelungen.
WO1998007530A1 (fr) * 1996-08-22 1998-02-26 Alfred Kärcher GmbH & Co. Appareil de nettoyage haute pression
US5845609A (en) * 1997-05-29 1998-12-08 Vapor Corporation Fluid heater coils
DE29812232U1 (de) * 1998-07-09 1999-09-09 Wap Reinigungssysteme Stehender Wärmetauscher

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012152313A1 (fr) 2011-05-10 2012-11-15 Alfred Kärcher Gmbh & Co. Kg Échangeur de chaleur et son procédé de fabrication
RU2550676C1 (ru) * 2011-05-10 2015-05-10 Альфред Кэрхер Гмбх Унд Ко. Кг Теплообменник и способы его изготовления

Also Published As

Publication number Publication date
EP1255085A2 (fr) 2002-11-06
DE10121805A1 (de) 2002-11-07
ATE322656T1 (de) 2006-04-15
DK1255085T3 (da) 2006-08-07
DE50206278D1 (de) 2006-05-18
EP1255085A3 (fr) 2003-10-08

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