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EP0026271A2 - Heat exchanger, particularly for gas or oil fired water heaters - Google Patents

Heat exchanger, particularly for gas or oil fired water heaters Download PDF

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Publication number
EP0026271A2
EP0026271A2 EP80103781A EP80103781A EP0026271A2 EP 0026271 A2 EP0026271 A2 EP 0026271A2 EP 80103781 A EP80103781 A EP 80103781A EP 80103781 A EP80103781 A EP 80103781A EP 0026271 A2 EP0026271 A2 EP 0026271A2
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
tube
rails
exchanger according
outer tube
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.)
Granted
Application number
EP80103781A
Other languages
German (de)
French (fr)
Other versions
EP0026271B1 (en
EP0026271A3 (en
Inventor
Ernst Dipl.-Ing. Schmidt
Josef Schmid
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to AT80103781T priority Critical patent/ATE4558T1/en
Publication of EP0026271A2 publication Critical patent/EP0026271A2/en
Publication of EP0026271A3 publication Critical patent/EP0026271A3/en
Application granted granted Critical
Publication of EP0026271B1 publication Critical patent/EP0026271B1/en
Expired legal-status Critical Current

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Classifications

    • 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
    • F24H1/48—Water heaters for central heating incorporating heaters for domestic water
    • F24H1/52—Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
    • F24H1/526—Pipes in pipe heat exchangers for sanitary water
    • 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
    • F24H1/48—Water heaters for central heating incorporating heaters for domestic water
    • F24H1/52—Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
    • 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
    • F28F9/007—Auxiliary supports for elements
    • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies

Definitions

  • the invention relates to a heat exchanger according to the preamble of the main claim.
  • a heat exchanger is already known, in which the outer tubes have an oval cross section and receive two superposed inner tubes which are provided with knobs on the outer circumference for the purpose of maintaining a distance from the outer tube and for holding without play (DE-OS 27 42 820 ).
  • This arrangement requires a subsequent treatment of the inner tubes by local encryption I modeling and tends because of the unfavorable cross-sectional shape of the longitudinal channel formed between the tubes for the first heat transfer medium for the addition of this channel by the entrained in the heat transfer medium impurities. This tendency is particularly present when a high proportion of lime precipitates from the heat transfer medium, which acts as a binder for the rust particles detached from the line pipes.
  • the arrangement according to the invention with the characterizing features of the main claim has the advantage that the longitudinal channel for the first heat transfer medium has a more compact cross-sectional profile due to the one-sided abutment of the inner tube or tubes on the inner wall of the outer tube and is therefore less prone to clogging than a longitudinal channel, which is formed between an outer tube and on all sides at a distance from the inner wall of the inner tubes.
  • Another advantage is that the inner tubes do not require protrusions, so that an additional operation to form them is not necessary.
  • heat exchangers which are designed as a lamella block and are located at the upper end of a combustion shaft which is arranged above a burner working with an open flame, it is particularly advantageous to provide the rails in the lower region of the outer tubes facing the combustion shaft. This ensures that there is a larger flow space for the first heat transfer medium in the main area of heat transfer.
  • the rails can be integrally formed on the outer tube or can be designed as individual parts which can subsequently be inserted. In this case, in order to achieve good heat transfer, it is advantageous if the rails are also provided with a convex contact surface which is adapted to the inner wall of the outer tube.
  • the rails are appropriately shaped so that they are not inserted twisted and cannot escape when inserted.
  • the outer tubes of which are soldered into the bottom plates of deflection or collecting chambers on both end faces, it is expedient to push the rail between the tubes only after the tubes have been soldered to the bottom plates.
  • FIG. 1 shows a side view of the heat exchanger and FIG. 2 shows a section along the line 11-11 in FIG. 1.
  • FIG. 3 the previous embodiment is illustrated on an enlarged scale by means of a cross section through the nested pipes of the heat exchanger, while FIG. 4 corresponds to this shows the arrangement according to the invention.
  • FIG. 5 shows a cross section through one of the rails between the outer and inner tubes of the heat exchanger.
  • the heat exchanger has a fin block 10 through which six heating water pipes 11 are passed.
  • the individual lamellae of the lamella block 10 are provided with collars 12 at the through-holes with which they are soldered to the heating water pipes 11.
  • the ends of the heating water pipes 11 are soldered on both ends of the lamella block 10 in a base plate 13, which is designed as a drawn sheet metal part with a raised flange 14.
  • the bottom plates 13 of both slat block sides have the same shape, which simplifies production and storage.
  • a cover plate 16 is placed on the left base plate 13 in FIG. 2, which is also designed as a drawn sheet metal part with a flange edge 17 and is tightly welded to the base plate 13 thereon.
  • the cover plate 16 has a bead-shaped recess 18 which bears against a small elevation 19 of the base plate 13 under tension, but without a fixed connection, and forms a labyrinth seal between the chambers 20 and 21 with this elevation 19.
  • the upper three heating water pipes 11 in FIG. 1 open into the chamber 20, while the chamber 21 encloses the mouths of the lower three heating water pipes 11.
  • the bottom plate 13 on the right in the drawing forms a chamber 23 with a cover plate 22, into which all six heating water pipes 11 open.
  • the chamber 20 is provided with a connection support 24 (FIG.
  • the heating water supplied via the chamber 21 and directed into the lower three heating water pipes 11 is diverted into the top three heating water pipes 11, from where the water enters the heating flow line via the chamber 20.
  • Extending within the heating water pipes 11 are smaller domestic water pipes 31, which are connected outside the heating water pipes 11 by elbows 32 and 33, which are arranged inside the chambers 20, 21 and 23 and are thereby washed by the heating water.
  • the elbows 33 are integrally formed on the service water pipes 31, while the elbows 32 are soldered to these pipes.
  • the process water pipes 31 and the elbows 32 and 33 form a two-layer process water pipe coil with a flow line 34, which appears in FIG. 1 as the left vertical pipe row, and a return line 35, which is at the top in FIG. 2 and covers the flow line 34 there.
  • the connection ends 37 and 38 of the two strands 34 and 35 are bent and made so long that they penetrate the cover plate 16 at a distance and allow perfect soldering.
  • the cover plate 16 has on its head side 41 a recessed section 42 for space-saving accommodation of nipples 43 and 44, which are soldered to the connection ends 37 and 38.
  • the opposite ends of the two strands 34 and 35 of the process water pipe coil, which are located in the chamber 20, are also cranked apart and connected to one another via a 180 ° elbow 45, which is also flushed with the heating water.
  • the two hot water pipes 31, each in a heating water pipe 11, are held and guided without play in the heating water pipe 11 by certain means.
  • these means are formed by knobs 58 (FIG. 3), which are connected to the process water pipes 11 are formed without cutting.
  • a rail 60 (FIGS. 4 and 5) is provided for this purpose in each heating water pipe 11, which rail is formed as an individual part and is joined between the pipes 11 and 31 before the parts are finally soldered together.
  • the rail 60 presses the overhead on the inner wall of the heating water tube 11 without play via the service water pipe 31 located below.
  • the process water pipes 31 are held without play in the central plane of the heating water pipe 11 and, moreover, it is avoided that the rail can be used in a rotated manner.
  • the rail 60 has a concave bearing surface 62 for the adjacent process water pipe 31 and a convex bearing surface 64 with which it is supported on the inner wall of the heating water pipe 11.
  • the width B of the rail 60 is larger than its height H, which corresponds to the length difference between the inside width of the heating water pipe 11 measured in the longitudinal direction and twice the outside diameter of the service water pipes 31.
  • the arched bearing surfaces 62 and 64 of the rail hold the parts against lateral displacement or tilting and at the same time ensure good heat transfer from the heating water pipe 11 to the service water pipes 31.
  • the rail 60 is designed as a drawn, thin-walled hollow part. However, it could also consist of solid material and, for example, be a double-T profile with a single web.
  • the arrangement of a single rail 60 in each heating water pipe 11 and the one-sided contact of the one hot water pipe 31 on the inner wall of the heating water pipe 11 form a cavity 66 (FIG. 4). through which the heating water can pass with less pressure loss than through the two gap-shaped cavities 68 (FIG. 3) of the known embodiment.
  • the assembly of the heat exchanger is so simple that first the fins and the base plates 13 are soldered to the heating water pipes 11 and then the hot water pipes 31 connected in pairs via the elbows 33 are pushed into the heating water pipes 11 from the side of the deflection chamber 23. Thereafter, the elbows 32 and 45 are soldered to the free ends of the sections 31 and then the rails 60 are inserted into the heating water pipes 11 and inserted therein by suitable means, e.g. secured by pinching their ends protruding from the heating water pipes 11 against axial displacement. Next, the cover plates 16 and 22 are placed on the base plates 13 and welded to the edge thereof.
  • connection ends 37 and 38 of the process water pipe coil are soldered to the cover plate 16 and the nipples 42 and 43 in one operation.
  • the cover plate 22 ensures that the connection ends 37 and 38 cannot dodge against the lamella block 10.

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  • Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Public Health (AREA)
  • Health & Medical Sciences (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Resistance Heating (AREA)
  • Details Of Fluid Heaters (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

1. A heat exchanger, especially for a gas or oil heated water heater, comprising at least one outer tube (11) conducting a first heat transfer medium and through which extends at least one inner tube (31) smaller in diameter for a second heat transfer medium which is in heat exchange relationship with the first transfer medium and further comprising means arranged at the periphery of the inner tube (31) for the clearance-free retention and guiding of the said tube within the outer tube (11), characterised in that, the means for the clearance-free retention and guiding of the inner tube (31) are formed by a rail (60) provided separately from the said tube and which forces the inner tube (31) unilaterally against the inner wall of the outer tube (11).

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Wärmeübertrager nach der Gattung des Hauptanspruchs. Es ist schon ein derartiger Wärmeübertrager bekannt, bei welchem die äußeren Rohre einen ovalen Querschnitt haben und zwei übereinanderliegende innere Rohre aufnehmen, welche zum Zweck der Abstandshaltung gegenüber dem äußeren Rohr und zum spiellosen Festhalten mit Noppen am Außenumfang versehen sind (DE-OS 27 42 820). Diese Anordnung bedingt eine nachträgliche Behandlung der inneren Rohre durch örtliche Ver- I formung und neigt wegen der ungünstigen Querschnittsform des zwischen den Rohren gebildeten Längskanals für das erste Wärmeträgermedium zum Zusetzen dieses Kanals durch die im Wärmeträgermedium mitgeführte Verunreinigungen. Diese Neigung ist besonders dann vorhanden, wenn aus dem Wärmeträgermedium ein hoher Kalkanteil ausfällt, der als Bindemittel für die von den Leitungsrohren abgelösten Rostteilchen wirkt. Als Folge einer ungenügenden Durchströmung des zwischen den Rohren gebildeten Längskanals können pulsierende Siedegeräusche am Wärmeübertrager auftreten. Bei Wärmeübertragern mit beiderseits an Bodenblechen von Umlenk- oder Sammelkammern angelöteten äußeren Rohren kann es ferner im Extremfall zum Ermüdungsbruch der Bodenbleche kommen.The invention relates to a heat exchanger according to the preamble of the main claim. Such a heat exchanger is already known, in which the outer tubes have an oval cross section and receive two superposed inner tubes which are provided with knobs on the outer circumference for the purpose of maintaining a distance from the outer tube and for holding without play (DE-OS 27 42 820 ). This arrangement requires a subsequent treatment of the inner tubes by local encryption I modeling and tends because of the unfavorable cross-sectional shape of the longitudinal channel formed between the tubes for the first heat transfer medium for the addition of this channel by the entrained in the heat transfer medium impurities. This tendency is particularly present when a high proportion of lime precipitates from the heat transfer medium, which acts as a binder for the rust particles detached from the line pipes. As a result of insufficient flow through the longitudinal channel formed between the tubes, pulsating boiling noises can occur at the heat exchanger to step. In heat exchangers with outer tubes soldered to both sides of floor plates of deflection or collecting chambers, fatigue fracture of the floor plates can also occur in extreme cases.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Anordnung mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß der Längskanal für das erste Wärmeträgermedium infolge der einseitigen Anlage des oder der inneren Rohre an der Innenwand des äußeren Rohres ein kompakteres Querschnittsprofil hat und daher weniger zum Zusetzen neigt als ein Längskanal, der zwischen einem äußeren Rohr und allseitig im Abstand zu dessen Innenwand gehaltenen inneren Rohren gebildet-ist. Ein weiterer Vorteil besteht darin, daß die inneren Rohre keine Vorsprünge benötigen, so daß ein zusätzlicher Arbeitsgang zu deren Bildung entfällt.The arrangement according to the invention with the characterizing features of the main claim has the advantage that the longitudinal channel for the first heat transfer medium has a more compact cross-sectional profile due to the one-sided abutment of the inner tube or tubes on the inner wall of the outer tube and is therefore less prone to clogging than a longitudinal channel, which is formed between an outer tube and on all sides at a distance from the inner wall of the inner tubes. Another advantage is that the inner tubes do not require protrusions, so that an additional operation to form them is not necessary.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Hauptanspruch angegebenen Anordnung möglich.Advantageous further developments and improvements of the arrangement specified in the main claim are possible through the measures listed in the subclaims.

Bei Wärmeübertragern, die als Lamellenblock ausgebildet am oberen Ende eines Verbrennungsschachtes sitzen, der über einem mit offener Flamme arbeitenden Brenner angeordnet ist, ist es besonders vorteilhaft, die Schienen in dem dem Verbrennungsschacht zugekehrten unteren Bereich der äußeren Rohre vorzusehen. Dadurch ist erreicht, daß gerade im Hauptbereich der Wärmeübertragung ein größerer Strömungsraum für das erste Wärmeträgermedium vorhanden ist.In the case of heat exchangers which are designed as a lamella block and are located at the upper end of a combustion shaft which is arranged above a burner working with an open flame, it is particularly advantageous to provide the rails in the lower region of the outer tubes facing the combustion shaft. This ensures that there is a larger flow space for the first heat transfer medium in the main area of heat transfer.

Ein guter zusätzlicher Wärmeübergang an die inneren Rohre ergibt sich, wenn die Schienen mit einer der Rundform des benachbarten inneren Rohres entsprechenden konkaven Auflagefläche für dieses Rohr versehen sind.A good additional heat transfer to the inner tubes is obtained if the rails are provided with a concave bearing surface for this tube which corresponds to the round shape of the adjacent inner tube.

Die Schienen können an das äußere Rohr angeformt oder für sich als nachträglich einsteckbare Einzelteile ausgebildet sein. In diesem Fall ist es zur Erreichung eines guten Wärmeüberganges vorteilhaft, wenn die Schienen auch mit einer der Innenwand des äußeren Rohres angepaßten konvexen Auflagefläche versehen sind.The rails can be integrally formed on the outer tube or can be designed as individual parts which can subsequently be inserted. In this case, in order to achieve good heat transfer, it is advantageous if the rails are also provided with a convex contact surface which is adapted to the inner wall of the outer tube.

Die Schienen werden zweckmäßig so geformt, daß sie nicht verdreht eingeschoben werden und beim Einschieben nicht ausweichen können. Bei Wärmeübertragern, deren äußere Rohre an beiden Stirnseiten in Bodenbleche von Umlenk- oder Sammelkammern eingelötet sind, ist es zweckmäßig, die Schiene erst nach dem Verlöten der Rohre mit den Bodenblechen zwischen die Rohre zu schieben.The rails are appropriately shaped so that they are not inserted twisted and cannot escape when inserted. In heat exchangers, the outer tubes of which are soldered into the bottom plates of deflection or collecting chambers on both end faces, it is expedient to push the rail between the tubes only after the tubes have been soldered to the bottom plates.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 eine Seitenansicht des Wärmeübertragers und Figur 2 einen Schnitt nach der Linie 11-11 in Figur 1. In Figur 3 ist anhand eines Querschnitts durch die ineinandergesteckten Rohre des Wärmeübertragers in vergrößertem Maßstab die bisherige Ausführung veranschaulicht, während Figur 4 in entsprechender Weise die erfindungsgemäße Anordnung zeigt. In Figur 5 ist ein Querschnitt durch eine der Schienen zwischen den äußeren und inneren Rohren des Wärmeübertragers dargestellt.An embodiment of the invention is shown in the drawing and explained in more detail in the following description. FIG. 1 shows a side view of the heat exchanger and FIG. 2 shows a section along the line 11-11 in FIG. 1. In FIG. 3, the previous embodiment is illustrated on an enlarged scale by means of a cross section through the nested pipes of the heat exchanger, while FIG. 4 corresponds to this shows the arrangement according to the invention. FIG. 5 shows a cross section through one of the rails between the outer and inner tubes of the heat exchanger.

Beschreibung der ErfindungDescription of the invention

Der Wärmeübertrager hat einen Lamellenblock 10, durch den sechs Heizwasserrohre 11 hindurchgeführt sind. Die einzelnen Lamellen des Lamellenblocks 10 sind an den Durchführungslöchern mit Kragen 12 versehen, mit denen sie an den Heizwasserrohren 11 angelötet sind. Die Enden der Heizwasserrohre 11 sind an beiden Stirnseiten des Lamellenblockes 10 in je eine Bodenplatte 13 eingelötet, die als gezogenes Blechteil mit hochgestelltem Flanschrand 14 ausgeführt ist. Die Bodenplatten 13 beider Lamellenblockseiten haben die gleiche Form, was die Fertigung und Lagerhaltung vereinfacht.The heat exchanger has a fin block 10 through which six heating water pipes 11 are passed. The individual lamellae of the lamella block 10 are provided with collars 12 at the through-holes with which they are soldered to the heating water pipes 11. The ends of the heating water pipes 11 are soldered on both ends of the lamella block 10 in a base plate 13, which is designed as a drawn sheet metal part with a raised flange 14. The bottom plates 13 of both slat block sides have the same shape, which simplifies production and storage.

Auf die in Figur 2 linke Bodenplatte 13 ist eine Deckelplatte 16 aufgesetzt, die ebenfalls als gezogenes Blechteil mit Flanschrand 17 ausgeführt und an diesem mit der Bodenplatte 13 dicht verschweißt ist. Die Deckelplatte 16 hat eine sickenförmige Vertiefung 18, die an einer kleinen Erhöhung 19 der Bodenplatte 13 unter Spannung, jedoch ohne feste Verbindung, anliegt und mit dieser Erhöhung 19 eine Labyrinthdichtung zwischen den Kammern 20 und 21 bildet. In die Kammer 20 münden die in Figur 1 oberen drei Heizwasserrohre 11 ein, während die Kammer 21 die Mündungen der unteren drei Heizwasserrohre 11 umschließt. Die in der Zeichnung rechts liegende Bodenplatte 13 bildet mit einer Deckelplatte 22 eine Kammer 23, in die alle sechs Heizwasserrohre 11 einmünden. Die Kammer 20 ist mit einem Anschlußstützen 24 (Figur 1) für eine Heizungsvorlaufleitung und die Kammer 21 mit einem Anschlußstutzen 25 für eine Heizungsrücklaufleitung versehen. In der Kammer 23 wird das über die Kammer 21 zugeführte und in die unteren drei Heizwasserrohre 11 geleitete Heizwasser umgelenkt in die oberen drei Heizwasserrohre 11, von wo das Wasser über die Kammer 20 in die Heizungsvorlaufleitung gelangt.A cover plate 16 is placed on the left base plate 13 in FIG. 2, which is also designed as a drawn sheet metal part with a flange edge 17 and is tightly welded to the base plate 13 thereon. The cover plate 16 has a bead-shaped recess 18 which bears against a small elevation 19 of the base plate 13 under tension, but without a fixed connection, and forms a labyrinth seal between the chambers 20 and 21 with this elevation 19. The upper three heating water pipes 11 in FIG. 1 open into the chamber 20, while the chamber 21 encloses the mouths of the lower three heating water pipes 11. The bottom plate 13 on the right in the drawing forms a chamber 23 with a cover plate 22, into which all six heating water pipes 11 open. The chamber 20 is provided with a connection support 24 (FIG. 1) for a heating flow line and the chamber 21 with a connection piece 25 for a heating return line. In the chamber 23, the heating water supplied via the chamber 21 and directed into the lower three heating water pipes 11 is diverted into the top three heating water pipes 11, from where the water enters the heating flow line via the chamber 20.

Innerhalb der Heizwasserrohre 11 erstrecken sich im Durchmesser kleinere Brauchwasserrohre 31, die außerhalb der Heizwasserrohre 11 durch Krümmer 32 und 33 verbunden sind, welche innerhalb der Kammern 20, 21 und 23 angeordnet und dadurch vom Heizwasser umspült sind. Die Krümmer 33 sind einstückig an die Brauchwasserrohre 31 angeformt, während die Krümmer 32 an diese Rohre angelötet sind. Die Brauchwasserrohre 31 und die Krümmer 32 und 33 bilden eine zweilagige Brauchwasserrohrschlange mit einem Vorlaufstrang 34, der in Figur 1 als linke senkrechte Rohrreihe erscheint, und einen Rücklaufstrang 35, der in Figur 2 oben liegt und dort den Vorlaufstrang 34 verdeckt. Die Anschlußenden 37 und 38 der beiden Stränge 34 und 35 sind so abgekröpft und so lang ausgeführt, daß sie die Deckelplatte 16 mit Abstand durchsetzen und eine einwandfreie Lötung ermöglichen. Im Bereich der Anschlußenden 37 und 38 hat die Deckelplatte 16 an ihrer Kopfseite 41 einen vertieften Abschnitt 42 zum platzsparenden Unterbringen von Nippeln 43 und.44, welche an den Anschlußenden 37 und 38 angelötet sind. Die gegenüberliegenden, in der Kammer 20 sich befindenden Enden der beiden Stränge 34 und 35 der Brauchwasserrohrschlange sind ebenfalls auseinandergekröpft und über einen 180°-Krümmer 45 miteinander verbunden, der ebenfalls vom Heizwasser umspült ist.Extending within the heating water pipes 11 are smaller domestic water pipes 31, which are connected outside the heating water pipes 11 by elbows 32 and 33, which are arranged inside the chambers 20, 21 and 23 and are thereby washed by the heating water. The elbows 33 are integrally formed on the service water pipes 31, while the elbows 32 are soldered to these pipes. The process water pipes 31 and the elbows 32 and 33 form a two-layer process water pipe coil with a flow line 34, which appears in FIG. 1 as the left vertical pipe row, and a return line 35, which is at the top in FIG. 2 and covers the flow line 34 there. The connection ends 37 and 38 of the two strands 34 and 35 are bent and made so long that they penetrate the cover plate 16 at a distance and allow perfect soldering. In the area of the connection ends 37 and 38, the cover plate 16 has on its head side 41 a recessed section 42 for space-saving accommodation of nipples 43 and 44, which are soldered to the connection ends 37 and 38. The opposite ends of the two strands 34 and 35 of the process water pipe coil, which are located in the chamber 20, are also cranked apart and connected to one another via a 180 ° elbow 45, which is also flushed with the heating water.

Die beiden jeweils in einem Heizwasserrohr 11 steckenden Brauchwasserrohre 31 werden durch bestimmte Mittel spiellos im Heizwasserrohr 11 gehalten und geführt. Bei der bekannten Ausführung sind diese Mittel durch Noppen 58 (Figur 3) gebildet, welche an die Brauchwasserrohre 11 spanlos angeformt sind. Beim Wärmeübertrager nach der vorliegenden Erfindung ist zu diesem Zweck in jedem Heizwasserrohr 11 eine Schiene 60 (Figur 4 und 5) vorgesehen, die als Einzelteil ausgebildet vor dem endgültigen Zusammenlöten der Teile zwischen die Rohre 11 und 31 gefügt ist. Die Schiene 60 drückt über das untenliegende Brauchwasserrohr 31 das obenliegende an die Innenwand des Heizwasserrohres 11 spiellos an.The two hot water pipes 31, each in a heating water pipe 11, are held and guided without play in the heating water pipe 11 by certain means. In the known embodiment, these means are formed by knobs 58 (FIG. 3), which are connected to the process water pipes 11 are formed without cutting. In the heat exchanger according to the present invention, a rail 60 (FIGS. 4 and 5) is provided for this purpose in each heating water pipe 11, which rail is formed as an individual part and is joined between the pipes 11 and 31 before the parts are finally soldered together. The rail 60 presses the overhead on the inner wall of the heating water tube 11 without play via the service water pipe 31 located below.

Durch eine besondere Ausbildung der Schiene 60 werden die Brauchwasserrohre 31 spiellos in der Mittelebene des Heizwasserrohres 11 gehalten und außerdem wird vermieden, daß die Schiene verdreht eingesetzt werden kann. Zu diesen Zwecken hat die Schiene 60 eine konkave Auflagefläche 62 für das benachbarte Brauchwasserrohr 31 und eine konvexe Auflagefläche 64, mit welcher sie sich an der Innenwand des Heizwasserrohres 11 abstützt. Ferner ist die Breite B der Schiene 60 größer als ihre Höhe H bemessen, welche dem Längenunterschied zwischen der in Längsrichtung gemessenen lichten Weite des Heizwasserrohres 11 und dem doppelten Außendurchmesser der Brauchwasserrohre 31 entspricht. Die gewölbten Auflageflächen 62 und 64 der Schiene halten die Teile gegen seitliches Verschieben bzw. Kippen fest und sorgen gleichzeitig für einen guten Wärmeübergang vom Heizwasserrohr 11 zu den Brauchwasserrohren 31.Due to a special design of the rail 60, the process water pipes 31 are held without play in the central plane of the heating water pipe 11 and, moreover, it is avoided that the rail can be used in a rotated manner. For these purposes, the rail 60 has a concave bearing surface 62 for the adjacent process water pipe 31 and a convex bearing surface 64 with which it is supported on the inner wall of the heating water pipe 11. Furthermore, the width B of the rail 60 is larger than its height H, which corresponds to the length difference between the inside width of the heating water pipe 11 measured in the longitudinal direction and twice the outside diameter of the service water pipes 31. The arched bearing surfaces 62 and 64 of the rail hold the parts against lateral displacement or tilting and at the same time ensure good heat transfer from the heating water pipe 11 to the service water pipes 31.

Die Schiene 60 ist als gezogenes, dünnwandiges Hohlteil ausgebildet. Sie könnte aber auch aus Vollmaterial be- 'stehen und z.B. ein Doppel-T-Profil mit einem einzigen Steg sein. Durch die Anordnung einer einzigen Schiene 60 in jedem Heizwasserrohr 11 und die einseitige Anlage des einen Brauchwasserrohres 31 an der Innenwand des Heizwasserrohres 11 wird ein Hohlraum 66 (Figur 4) gebildet, durch den das Heizwasser mit geringerem Druckverlust als durch die beiden spaltförmigen Hohlräume 68 (Figur 3) der bekannten Ausführung hindurchtreten kann.The rail 60 is designed as a drawn, thin-walled hollow part. However, it could also consist of solid material and, for example, be a double-T profile with a single web. The arrangement of a single rail 60 in each heating water pipe 11 and the one-sided contact of the one hot water pipe 31 on the inner wall of the heating water pipe 11 form a cavity 66 (FIG. 4). through which the heating water can pass with less pressure loss than through the two gap-shaped cavities 68 (FIG. 3) of the known embodiment.

Der Zusammenbau des Wärmeübertragers geht einfach so vor sich, daß zunächst die Lamellen und die Bodenplatten 13 mit den Heizwasserrohren 11 verlötet und dann die über die Krümmer 33 paarweise verbundenen Brauchwasserrohre 31 von der Seite der Umlenkkammer 23 her in die Heizwasserrohre 11 eingeschoben werden. Danach werden die Krümmer 32 und 45 an die freien Enden der Abschnitte 31 angelötet und danach die Schienen 60 in die Heizwasserrohre 11 eingeschoben und darin durch geeignete Mittel, z.B. durch Verquetschen ihrer aus den Heizwasserrohren 11 herausragenden Enden gegen axiales Verschieben gesichert. Als nächstes werden die Deckelplatten 16 und 22 auf die Bodenplatten 13 aufgesetzt und mit diesen am Rande verschweißt. Dabei kommt die Vertiefung 18 in der Deckelplatte 16 zur Anlage an die Erhöhung 19 der Bodenplatte 13, so daß ohne zusätzliche Maßnahmen die beiden Kammern 20 und 21 gebildet und ausreichend gegeneinander abgedichtet werden. Zum Schluß werden jeweils in einem Arbeitsgang die Anschlußenden 37 und 38 der Brauchwasserrohrschlange mit der Dekkelplatte 16 und den Nippeln 42 und 43 verlötet. Dabei sorgt die Deckelplatte 22 dafür, daß die Anschlußenden 37 und 38 nicht gegen den Lamellenblock 10 hin ausweichen können.The assembly of the heat exchanger is so simple that first the fins and the base plates 13 are soldered to the heating water pipes 11 and then the hot water pipes 31 connected in pairs via the elbows 33 are pushed into the heating water pipes 11 from the side of the deflection chamber 23. Thereafter, the elbows 32 and 45 are soldered to the free ends of the sections 31 and then the rails 60 are inserted into the heating water pipes 11 and inserted therein by suitable means, e.g. secured by pinching their ends protruding from the heating water pipes 11 against axial displacement. Next, the cover plates 16 and 22 are placed on the base plates 13 and welded to the edge thereof. The recess 18 in the cover plate 16 comes to rest on the elevation 19 of the base plate 13, so that the two chambers 20 and 21 are formed and adequately sealed against one another without additional measures. Finally, the connection ends 37 and 38 of the process water pipe coil are soldered to the cover plate 16 and the nipples 42 and 43 in one operation. The cover plate 22 ensures that the connection ends 37 and 38 cannot dodge against the lamella block 10.

Claims (9)

1. Wärmeübertrager, insbesondere für einen gas- oder ölbeheizten Wassererhitzer, mit mindestens einem ein erstes Wärmeträgermedium führenden äußeren Rohr, durch das sich mindestens ein im Durchmesser kleineres inneres Rohr für ein zweites Wärmeträgermedium erstreckt, welches mit dem ersten in Wärmeaustausch steht, und ferner mit am Umfang des inneren Rohres angeordneten Mitteln zum spiellosen Halten und Führen dieses Rohres im äußeren Rohr, dadurch gekennzeichnet, daß die Mittel zum spiellosen Halten und Führen des inneren Rohres (31) durch eine getrennt von diesem Rohr ausgeführte Schiene (60) gebildet sind, welche das innere Rohr einseitig gegen die Innenwand des äußeren Rohres (11) drückt.1. Heat exchanger, in particular for a gas or oil-heated water heater, with at least one outer tube carrying a first heat transfer medium, through which at least one inner tube with a smaller diameter extends for a second heat transfer medium, which is in heat exchange with the first, and also with means arranged on the circumference of the inner tube for holding and guiding this tube without play in the outer tube, characterized in that the means for holding and guiding the inner tube (31) without play are formed by a rail (60) which is separate from this tube and which the inner tube presses on one side against the inner wall of the outer tube (11). 2. Wärmeübertrager nach Anspruch 1, dessen äußere Rohre einen ovalen Querschnitt haben und zwei neben- bzw. übereinanderliegende innere Rohre enthalten, dadurch gekennzeichnet, daß die Schiene (60) in der Querschnitts-Längsachse des äußeren Rohres (11) zwischen dessen Innenwand und dem einen inneren Rohr (31) angeordnet ist und über dieses das andere innere Rohr an den gegenüberliegenden Innenwandabschnitt des äußeren Rohres drückt.2. Heat exchanger according to claim 1, the outer tubes have an oval cross-section and contain two adjacent or superposed inner tubes, characterized in that the rail (60) in the cross-sectional longitudinal Axis of the outer tube (11) between the inner wall and the one inner tube (31) is arranged and via this presses the other inner tube to the opposite inner wall portion of the outer tube. 3. Wärmeübertrager nach Anspruch 1 oder 2, der als Lamellenblock ausgebildet am oberen Ende eines Verbrennungsschachtes sitzt, der über einem mit offener Flamme arbeitenden Brenner befestigt ist, dadurch gekennzeichnet, daß die Schienen (60) in dem dem Verbrennungsschacht zugekehrten unteren Bereich der äußeren Rohre (11) angeordnet sind.3. Heat exchanger according to claim 1 or 2, which is designed as a lamella block at the upper end of a combustion shaft, which is fastened over a burner working with an open flame, characterized in that the rails (60) in the combustion chamber facing the lower region of the outer tubes (11) are arranged. 4. Wärmeübertrager nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Schienen (60) mit einer der Rundform des Rohres (31) entsprechenden konkaven Auflagefläche'(62) versehen sind.4. Heat exchanger according to one of the preceding claims, characterized in that the rails (60) with a round shape of the tube (31) corresponding concave bearing surface '(62) are provided. 5. Wärmeübertrager nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Schienen (60) als getrennt vom äußeren Rohr (11) ausgeführte und in den Zwischenraum zwischen die Rohre einsteckbare Einzelteile ausgebildet sind.5. Heat exchanger according to one of the preceding claims, characterized in that the rails (60) are designed as separate parts from the outer tube (11) and can be inserted into the intermediate space between the tubes. 6. Wärmeübertrager nach Anspruch 4 und 5, dadurch gekennzeichnet, daß die Schienen (60) mit einer der Innenwand des äußeren Rohres (11) angepaßten konvexen Auflagefläche (64) versehen sind.6. Heat exchanger according to claim 4 and 5, characterized in that the rails (60) with one of the inner wall of the outer tube (11) matched convex bearing surface (64) are provided. 7. Wärmeübertrager nach Anspruch 6, dadurch gekennzeichnet, daß die Breite (B) der Auflageflächen der Schiene (60) so gewählt ist, daß die Schienen (60) nur in der vorgeschriebenen Lage zwischen die Rohre (11, 31) einfügbar sind.7. Heat exchanger according to claim 6, characterized in that the width (B) of the contact surfaces of the rail (60) is selected so that the rails (60) can only be inserted between the tubes (11, 31) in the prescribed position. 8. Wärmeübertrager nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß die Schienen (60) ein Doppel-T-Profil haben.8. Heat exchanger according to claim 6 or 7, characterized in that the rails (60) have a double T profile. 9. Wärmeübertrager nach Anspruch 8, dadurch gekennzeichnet, daß die Schienen (60) als Doppel-T-Profil mit zwei im Abstand voneinander angeordneten Stegen zwischen den Auflageflächen (62, 64) ausgebildet sind.9. Heat exchanger according to claim 8, characterized in that the rails (60) are designed as a double-T profile with two spaced webs between the bearing surfaces (62, 64).
EP80103781A 1979-09-26 1980-07-03 Heat exchanger, particularly for gas or oil fired water heaters Expired EP0026271B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80103781T ATE4558T1 (en) 1979-09-26 1980-07-03 HEAT EXCHANGER, ESPECIALLY FOR GAS OR OIL HEATED WATER HEATER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19797927253U DE7927253U1 (en) 1979-09-26 1979-09-26 HEAT EXCHANGER, ESPECIALLY FOR GAS OR OIL HEATED WATER HEATERS
DE7927253U 1979-09-26

Publications (3)

Publication Number Publication Date
EP0026271A2 true EP0026271A2 (en) 1981-04-08
EP0026271A3 EP0026271A3 (en) 1981-05-27
EP0026271B1 EP0026271B1 (en) 1983-08-31

Family

ID=6707715

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80103781A Expired EP0026271B1 (en) 1979-09-26 1980-07-03 Heat exchanger, particularly for gas or oil fired water heaters

Country Status (6)

Country Link
EP (1) EP0026271B1 (en)
JP (1) JPS5656583A (en)
AT (1) ATE4558T1 (en)
DE (2) DE7927253U1 (en)
ES (1) ES495337A0 (en)
YU (1) YU41943B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2627263A1 (en) * 1988-02-16 1989-08-18 Leblanc Sa E L M CENTRAL HEATING SYSTEM WITH DOMESTIC HOT WATER CIRCUIT
WO2020156615A1 (en) * 2019-01-29 2020-08-06 Faiveley Transport Leipzig Gmbh & Co. Kg Heat exchanger for flammable refrigerants
CN118208970A (en) * 2024-04-03 2024-06-18 常山永成制冷设备有限公司 Reflux condenser

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010071583A (en) * 2008-09-19 2010-04-02 Mitsubishi Electric Corp Heat exchanger and water heater including the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1217691A (en) * 1958-10-29 1960-05-05 Grenobloise Etude Appl Tube supports for heat exchangers or similar devices
FR2404178A1 (en) * 1977-09-23 1979-04-20 Bosch Gmbh Robert HEAT TRANSMITTER FOR A FREE FLOW WATER HEATER HEATED WITH GAS OR OIL

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4827437B1 (en) * 1970-12-30 1973-08-22
JPS5319164B2 (en) * 1972-05-30 1978-06-19

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1217691A (en) * 1958-10-29 1960-05-05 Grenobloise Etude Appl Tube supports for heat exchangers or similar devices
FR2404178A1 (en) * 1977-09-23 1979-04-20 Bosch Gmbh Robert HEAT TRANSMITTER FOR A FREE FLOW WATER HEATER HEATED WITH GAS OR OIL

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2627263A1 (en) * 1988-02-16 1989-08-18 Leblanc Sa E L M CENTRAL HEATING SYSTEM WITH DOMESTIC HOT WATER CIRCUIT
BE1006641A5 (en) * 1988-02-16 1994-11-08 Leblanc Sa E L M Central heating with water system domestic hot.
WO2020156615A1 (en) * 2019-01-29 2020-08-06 Faiveley Transport Leipzig Gmbh & Co. Kg Heat exchanger for flammable refrigerants
CN113366276A (en) * 2019-01-29 2021-09-07 法维莱运输莱比锡有限两合公司 Heat exchanger for inflammable refrigerant
CN113366276B (en) * 2019-01-29 2023-12-19 法维莱运输莱比锡有限两合公司 Heat exchanger for inflammable refrigerant
CN118208970A (en) * 2024-04-03 2024-06-18 常山永成制冷设备有限公司 Reflux condenser

Also Published As

Publication number Publication date
EP0026271B1 (en) 1983-08-31
YU230580A (en) 1983-09-30
JPS5656583A (en) 1981-05-18
ATE4558T1 (en) 1983-09-15
EP0026271A3 (en) 1981-05-27
ES8200178A1 (en) 1981-10-16
DE7927253U1 (en) 1981-03-26
ES495337A0 (en) 1981-10-16
YU41943B (en) 1988-02-29
DE3064696D1 (en) 1983-10-06

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