EP0825392B1 - Heat exchanger for a boiler,esp.for a wall mounted gas fired boiler - Google Patents

Heat exchanger for a boiler,esp.for a wall mounted gas fired boiler Download PDF

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Publication number
EP0825392B1
EP0825392B1 EP97111875A EP97111875A EP0825392B1 EP 0825392 B1 EP0825392 B1 EP 0825392B1 EP 97111875 A EP97111875 A EP 97111875A EP 97111875 A EP97111875 A EP 97111875A EP 0825392 B1 EP0825392 B1 EP 0825392B1
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EP
European Patent Office
Prior art keywords
pipe
heat exchanger
sheet metal
metal jacket
exchanger according
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EP97111875A
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German (de)
French (fr)
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EP0825392A2 (en
EP0825392A3 (en
Inventor
Gerhard Gerg
Johann Kögl
Wolfgang Hirsch
Alois Kohlhuber
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Wolf GmbH
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Wolf GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • 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
    • F24H1/43—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes helically or spirally coiled
    • 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
    • F24H9/00—Details
    • F24H9/14—Arrangements for connecting different sections, e.g. in water heaters 
    • 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
    • F24H9/00—Details
    • F24H9/14—Arrangements for connecting different sections, e.g. in water heaters 
    • F24H9/148—Arrangements of boiler components on a frame or within a casing to build the fluid heater, e.g. boiler
    • 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

Definitions

  • the invention relates to a heat exchanger for one Boiler, especially a wall-hung gas boiler, according to the Preamble of claim 1.
  • Such a heat exchanger is generally known.
  • heat exchangers comprise one to one hollow cylindrical tube body helically bent tube, in particular finned tube with forward and return, which concentric around a burner or its flame is arranged. The insertion takes place via forward and reverse this heat exchanger in a water cycle, e.g. B. Heating water circuit.
  • the pipe heat exchanger can be contaminated do not avoid. This applies in particular to a heat exchanger from a helical or helical curved finned tube. Under certain operating conditions the contamination due to caking can be very hard. This means that cleaning is only possible with the help of a brush is. For this purpose, the heat exchanger must be on all sides if possible be accessible. Accordingly, it is necessary to Remove the heat exchanger for cleaning purposes.
  • There with the conventional designs of heat exchangers within one cylindrical housing is welded or glued disassembly for the purpose of cleaning with a brush or not only partially possible (partial cleaning).
  • Combustion chamber housing within which the heat exchanger mentioned can be placed, usually made of aluminum or one Cast aluminum alloy.
  • These cast designs are very complex, large-volume and heavy. The manufacture is accordingly expensive. Due to the fact that the above mentioned tubular body inexpensive only with relatively large Diameter tolerances can be produced in the assembled state between tube body and combustion chamber wall more or avoid smaller gaps. Such a column adversely affect performance, exhaust gas temperature, Amount of condensate and degree of utilization. A compensation through specially shaped combustion chamber walls are complex and expensive.
  • the present invention has for its object a To create heat exchanger of the type mentioned, which for Easy to assemble or disassemble for cleaning purposes, and which is also characterized by a compared to the stand technology is characterized by simpler construction, which can also compensate for larger tolerances.
  • the core is Present invention, a combustion chamber housing, which by a cylindrical sheet metal jacket consisting of two from each other separable jacket halves is formed within the or those at a short distance, especially under close contact with it tube bent into a hollow cylindrical body, in particular Finned tube can be placed. Accordingly needs for assembly or disassembly of the tubular body only a jacket half to be removed. When assigning forward and reverse to other half of the jacket, it is possible to connect the front and Arrange the return outside of this jacket half. Will this Disconnected, the tubular body can be laterally in particular forward from the still remaining and with a housing of the Boiler or the like connected sheet metal jacket half pull out.
  • the two jacket halves also allow a preload in radial direction and thus close contact with the tubular body, the contact pressure is preferably adjustable. In order to manufacturing tolerances and thermal stresses compensate. The heat transfer from flue gas to water, which flows through the tubular body remains constant high.
  • the sheet metal jacket consists of the two jacket halves preferably made of thin-walled aluminum sheet or a sheet made of a suitable aluminum alloy. So that can be Total weight of the heat exchanger including the combustion chamber is considerable to reduce.
  • the one preferably used to form the tubular body Finned tube is also usually made of aluminum.
  • the is by Rohrköprer defined a cavity on one face disc-shaped end plate through which the burner passes stretched through, and on the opposite end through a pot-shaped insert protruding into the cavity limited. Between this pot-shaped insert and the outer one Sheet metal jacket becomes a through the helically bent tube, in particular finned tube filled annular space defined in opens a flue gas collector.
  • the pot-like insert is similar to the outer sheet metal jacket on the outside closely to the inside of the tubular body, and in such a way that the pot-like use relative to Tube body is axially displaceable. So that the Optimally adjust the combustion chamber length in a simple manner.
  • the outer sheet metal jacket preload radially, d. H. under radial preload on the Outside of the tube body.
  • separate clamping means assigned to the outer sheet metal jacket preferably means for adjusting the radial Have preload.
  • the clamping devices can be Buckle closures according to the buckle closures of Act ski boots or the like.
  • Clamping devices also include straps with toggle locks can be used in the manner of a pipe clamp around the the entire circumference of the sheet metal jacket.
  • the attachment of a sheet metal jacket half to the housing of the Boiler or similar device takes place at one preferred embodiment via block elements, in particular L-shaped trained block elements, each one of the curvature have the corresponding contact surface of the sheet metal jacket half.
  • the Contact surfaces of the flow and return assigned Block elements each also include a receiving opening, in particular mounting hole for the forward and return of the Tubular body or for those assigned to the flow and return Pipe socket. One is above the receiving openings Connection between pipe body and water circuit can be established.
  • the block elements are used to attach the rear Sheet metal jacket as well as for holding the heat exchanger.
  • the block elements mentioned are preferably made of aluminum manufactured and have an L-shaped basic shape.
  • FIG 1 is a schematic perspective view Gas heater based on the condensation principle, namely a so-called wall-hung gas condensing boiler 10 with a housing 11, of which only the rear wall and the side walls are shown are and a heat exchanger 12 in a perspective view shown.
  • the heat exchanger 12 comprises one to one hollow cylindrical tube body 13 helically bent tube, namely finned tube 14 with shown in more detail in Figure 2 Forward 15 and return 16, via which the tubular body 13 in one water cycle not shown in the figures is insertable. Part of the water cycle is shown in Figure 1 shown with the return pipe 17 and one in the return pipe integrated heating water pump 18.
  • the hollow cylindrical tube body is concentric around an in Figure 3 schematically shown gas burner 19 or its Flame arranged around.
  • the burner 19 thus extends in the gas boiler shown in the figures from above concentrically into the hollow cylindrical tubular body 13.
  • the Burner 19 is preceded by a fan 20, which is a Fuel gas-air mixture to the burner 19 promotes, namely a fuel gas-air line 21 therethrough.
  • a fan 20 which is a Fuel gas-air mixture to the burner 19 promotes, namely a fuel gas-air line 21 therethrough.
  • the blower 20 opens a gas supply line 22.
  • the air admixture from the The environment is indicated by the arrow 23 in FIG. 1.
  • the Tube body 13 is inside a cylindrical sheet metal jacket consisting of two separable jacket halves 24, 25 (see Figure 2) under close contact on the inside of this placed on both halves of the coat.
  • the cup-shaped insert 29 is close to the inside of the Tubular body 13, in such a way that it is relative when needed is axially displaceable to this. In this way, the Adjust the length of the combustion chamber 36 if necessary. Furthermore this axial displacement is of course necessary for Purposes of assembly and disassembly in the event of a revision or cleaning the tubular body 13.
  • One sheet metal jacket half namely here the sheet metal jacket half 24, is on the housing 11 of the boiler or gas boiler 10, specifically attached to the back wall, whereby in assembled condition through this jacket half forward and return of the helically bent finned tube 14 through and in with intake openings connected to the water cycle stretch in, within which forward and reverse with Sealing seat can be anchored.
  • the corresponding Passage socket for forward and return of the tubular body 13 in the sheet metal jacket half 24 are in Figure 2 with the reference numerals 37 and 38 marked. Forward and return flow of the tubular body 13 are defined by corresponding pipe sockets, which are in the assembled state through the passage socket 37, 38 of the Extend the sheet metal jacket half 24.
  • the the pre and Return pipe stub extend in the assembled state of the tubular body 13 approximately perpendicular to Back wall of the housing 11 of the gas boiler 10. This is it possible, after removing the front sheet metal jacket half 25 den Pull the tubular body 13 forward. On this occasion are the pipe sockets that define the flow and return the associated receiving openings for connection to the Water circuit pulled out. The assembly of the tubular body 13 takes place in the opposite direction.
  • the two Sheet metal jacket halves each have radially projecting axial webs 39, 40 on. These axial webs serve to connect the two Sheet metal jacket halves 24, 25. With this construction it is only conditionally possible, the two sheet metal jacket halves to the Press outside of the tubular body 13. For this purpose you should a relatively thick sealing strip made of elastic sealing material, especially silicone, between the adjacent ones Axial webs 39, 40 of the two sheet metal jacket halves arranged become. Only in this way could the two sheet metal jacket halves be radial preload under a correspondingly tight system on the outside of the tubular body 13.
  • a more elegant solution is a solution in which the two sheet metal jacket halves 24, 25 in the assembled state in Axial direction are tangentially overlapping.
  • the then the seal arranged in the overlap area can be relative be thin, for example in the form of a thin one Silicone sealing strip.
  • they form each other associated longitudinal edges of the two sheet metal jacket halves one Labyrinth seal without a separate sealing strip.
  • the purpose is the one longitudinal edge to a V-shaped longitudinal groove deformed, into which the opposite longitudinal edge is fitted becomes.
  • this is a sheet metal jacket half 24 on the housing of the gas boiler, namely on the rear wall of the same attached, preferably via block elements 41, the in each case one of the curvatures of the sheet metal jacket half 24 have corresponding contact surface 42.
  • the sheet metal jacket half 24 In the present case are used to attach the sheet metal jacket half 24 only two relative to this diagonally arranged block elements 41, the assigned to the forward and return 15, 16 of the tubular body 13 are.
  • the contact surfaces 42 of these two block elements 41 are receiving openings, in particular receiving bores 43 for the forward and reverse 15, 16 and the corresponding Pipe socket formed through which a connection between Tubular body 13 and the water circuit can be produced.
  • the mentioned receiving holes 43 for the forward and / or return or the corresponding pipe socket each have an annular groove 44 for placing one of the mentioned pipe sockets tight enclosing sealing ring, in particular O-rings.
  • O-ring 45 the left half of such an O-ring 45 is shown.
  • the pipe sockets assigned to the supply and / or return are within the receiving holes 43 by a tangential through the contact area between pipe socket and Receiving hole extending pin 46 or the like held within the receiving bore 43.
  • the Pin 46 part of a clip, like a barrette is trained.
  • One leg of this bracket defines that mentioned retaining pin 46, while the other leg on the Outer surface of the block member 41 abuts such that the Retaining pin 46 is secured.
  • connection bore 47 for the forward or return assigned pipe socket opens into a within the associated block element 41 formed connection bore 47th for the water cycle.
  • the connection bore 47 is part of a Connection pipe socket 48.
  • This connection pipe socket 48 is integral part of the block element 41.
  • the receiving bore 43 and connection bore 47 intersect within the L-shaped Block element 41 at a right angle.
  • the block element 41 is attached by a Fastening screw, which is assigned by an Screw hole 49 extends in the block element 41. This Screw is also used to attach the to the Contact surface 42 supported sheet metal jacket half 24, which is shown in FIG 5 is indicated with a broken line.
  • sealing elements in particular annular sealing strips made of silicone or the like heat-resistant material are arranged. So that becomes a hermetically sealed combustion chamber housing created.
  • the gas burner 19 preferably enables a modulating regulated power adjustment by appropriate control of the above-mentioned blower 20.
  • the construction described is particularly suitable for Heat exchanger tube body 13 with an outer diameter of up to to about 200 mm.
  • front sheet metal jacket half 25 Hinge on the connected to the housing 11 of the gas boiler Articulate the sheet metal jacket half so that the front Sheet metal jacket half 25 for the purpose of assembling and disassembling the Tube body 13 only folded forward and to the side must become.
  • the hinge axis extends along one Axial line of the sheet metal jacket.
  • the sheet metal jacket has a wall thickness of approximately 0.5 to 1.5, in particular about 1.0 mm and consists of aluminum or one Aluminum alloy. It is a pronounced one Lightweight construction, what kind of wall-hung gas heaters from Meaning is.

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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)
  • Details Of Fluid Heaters (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)

Abstract

The heat exchanger for a water boiler, and especially a wall-mounted gas boiler, has a cylindrical sheet mantle (26), composed of two half-mantles (24,25) which can be separated from each other. The water pipe coil (13) is inserted within the mantle, concentrically round the gas burner, in a tight fit with only a small gap at most.

Description

Die Erfindung betrifft einen Wärmetauscher für einen Heizkessel, insbesondere eine wandhängende Gastherme, gemäß dem Oberbegriff des Anspruches 1.The invention relates to a heat exchanger for one Boiler, especially a wall-hung gas boiler, according to the Preamble of claim 1.

Ein derartiger Wärmetauscher ist allgemein bekannt. Beispielhaft wird verwiesen auf die DE 43 09 598 A1. Dementsprechend umfassen derartige Wärmetauscher ein zu einem hohlzylindrischen Rohrkörper wendelförmig gebogenes Rohr, insbesondere Rippenrohr mit Vor- und Rücklauf, welches konzentrisch um einen Brenner bzw. dessen Flamme herum angeordnet wird. Über Vor- und Rücklauf erfolgt die Einfügung dieses Wärmetauschers in einen Wasserkreislauf, z. B. Heizwasser-Kreislauf.Such a heat exchanger is generally known. For example, reference is made to DE 43 09 598 A1. Accordingly, such heat exchangers comprise one to one hollow cylindrical tube body helically bent tube, in particular finned tube with forward and return, which concentric around a burner or its flame is arranged. The insertion takes place via forward and reverse this heat exchanger in a water cycle, e.g. B. Heating water circuit.

In der Praxis läßt sich eine Verschmutzung des Rohr-Wärmetauschers nicht vermeiden. Dies gilt insbesondere für einen Wärmetauscher aus einem schrauben- oder wendelförmig gebogenen Rippenrohr. Bei bestimmten Betriebsbedingungen kann die Verschmutzung aufgrund von Anbackungen sehr hart sein. Dies bedeutet, daß eine Reinigung nur mit Hilfe einer Bürste möglich ist. Zu diesem Zweck muß der Wärmetauscher möglichst allseitig zugänglich sein. Dementsprechend ist es erforderlich, zum Zwecke der Reinigung den Wärmetauscher auszubauen. Da bei den herkömmlichen Konstruktionen der Wärmetauscher innerhalb eines zylindrischen Gehäuses eingeschweißt oder eingeklebt ist, ist eine Demontage zum Zwecke einer Reinigung mit Bürste nicht oder nur teilweise (Teilreinigung) möglich. In practice, the pipe heat exchanger can be contaminated do not avoid. This applies in particular to a heat exchanger from a helical or helical curved finned tube. Under certain operating conditions the contamination due to caking can be very hard. This means that cleaning is only possible with the help of a brush is. For this purpose, the heat exchanger must be on all sides if possible be accessible. Accordingly, it is necessary to Remove the heat exchanger for cleaning purposes. There with the conventional designs of heat exchangers within one cylindrical housing is welded or glued disassembly for the purpose of cleaning with a brush or not only partially possible (partial cleaning).

Des weiteren sind beim Stand der Technik die Brennkammergehäuse, innerhalb denen der erwähnte Wärmetauscher plazierbar ist, meist aus Aluminium oder einer Aluminiumlegierung gegossen. Diese Gußkonstruktionen sind sehr aufwendig, großvolumig und schwer. Die Herstellung ist entsprechend teuer. Aufgrund der Tatsache, daß die oben erwähnten Rohrkörper kostengünstig nur mit relativ großen Durchmessertoleranzen hergestellt werden können, lassen sich im montierten Zustand zwischen Rohrkörper und Brennkammerwand mehr oder weniger große Spalte nicht vermeiden. Derartige Spalte wirken sich nachteilig auf Leistung, Abgastemperatur, Kondensatmenge und Nutzungsgrad aus. Eine Kompensation durch speziell geformte Brennkammerwände ist aufwendig und teuer.Furthermore, in the prior art Combustion chamber housing, within which the heat exchanger mentioned can be placed, usually made of aluminum or one Cast aluminum alloy. These cast designs are very complex, large-volume and heavy. The manufacture is accordingly expensive. Due to the fact that the above mentioned tubular body inexpensive only with relatively large Diameter tolerances can be produced in the assembled state between tube body and combustion chamber wall more or avoid smaller gaps. Such a column adversely affect performance, exhaust gas temperature, Amount of condensate and degree of utilization. A compensation through specially shaped combustion chamber walls are complex and expensive.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen Wärmetauscher der eingangs genannten Art zu schaffen, der zum Zwecke der Reinigung leicht montierbar bzw. demontierbar ist, und der sich darüberhinaus durch eine im Vergleich zum Stand der Technik einfachere Konstruktion auszeichnet, die gleichzeitig auch größere Toleranzen kompensieren kann.The present invention has for its object a To create heat exchanger of the type mentioned, which for Easy to assemble or disassemble for cleaning purposes, and which is also characterized by a compared to the stand technology is characterized by simpler construction, which can also compensate for larger tolerances.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Dementsprechend ist Kern der vorliegenden Erfindung ein Brennkammergehäuse, welches durch einen zylindrischen Blechmantel bestehend aus zwei voneinander trennbaren Mantelhälften gebildet ist, innerhalb den bzw. denen mit geringem Abstand, insbesondere unter enger Anlage daran das zu einem hohlzylindrischen Körper gebogene Rohr, insbesondere Rippenrohr plazierbar ist. Dementsprechend braucht zur Montage oder Demontage des Rohrkörpers lediglich eine Mantelhälfte entfernt zu werden. Bei Zuordnung von Vor- und Rücklauf zu der anderen Mantelhälfte ist es möglich, den Anschluß von Vor- und Rücklauf außerhalb dieser Mantelhälfte anzuordnen. Wird dieser Anschluß gelöst, läßt sich der Rohrkörper seitlich insbesondere nach vorne aus der noch verbliebenen und mit einem Gehäuse des Heizkessels oder dergleichen verbundenen Blechmantelhälfte herausziehen. Wird dieses Herausziehen durch ein Kippen des Rohrkörpers überlagert, ist es nicht erforderlich, den in den Rohrkörper hineinragenden Brennerabschnitt zu demontieren. Die Montage und Demontage des erfindungsgemäßen Wärmetauschers ist also im Vergleich zum Stand der Technik erheblich einfacher.This object is achieved by the characterizing Features of claim 1 solved. Accordingly, the core is Present invention, a combustion chamber housing, which by a cylindrical sheet metal jacket consisting of two from each other separable jacket halves is formed within the or those at a short distance, especially under close contact with it tube bent into a hollow cylindrical body, in particular Finned tube can be placed. Accordingly needs for assembly or disassembly of the tubular body only a jacket half to be removed. When assigning forward and reverse to other half of the jacket, it is possible to connect the front and Arrange the return outside of this jacket half. Will this Disconnected, the tubular body can be laterally in particular forward from the still remaining and with a housing of the Boiler or the like connected sheet metal jacket half pull out. Is this pulling out by tilting the Superimposed tubular body, it is not necessary to in the Dismantle tubular body protruding burner section. The Assembly and disassembly of the heat exchanger according to the invention So much easier compared to the prior art.

Die beiden Mantelhälften erlauben auch eine Vorspannung in radialer Richtung und damit eine enge Anlage an den Rohrkörper, wobei der Anpreßdruck vorzugsweise einstellbar ist. Damit lassen sich Fertigungstoleranzen und Wärmespannungen kompensieren. Die Wärmeübertragung von Rauchgas zum Wasser, welches durch den Rohrkörper strömt, bleibt gleichbleibend hoch.The two jacket halves also allow a preload in radial direction and thus close contact with the tubular body, the contact pressure is preferably adjustable. In order to manufacturing tolerances and thermal stresses compensate. The heat transfer from flue gas to water, which flows through the tubular body remains constant high.

Der aus den beiden Mantelhälften bestehende Blechmantel besteht vorzugsweise aus dünnwandigem Aluminiumblech oder einem Blech aus einer geeigneten Aluminiumlegierung. Damit läßt sich das Gesamtgewicht des Wärmetauschers samt Brennkammer erheblich reduzieren.The sheet metal jacket consists of the two jacket halves preferably made of thin-walled aluminum sheet or a sheet made of a suitable aluminum alloy. So that can be Total weight of the heat exchanger including the combustion chamber is considerable to reduce.

Das zur Ausbildung des Rohrkörpers vorzugsweise verwendete Rippenrohr besteht ebenfalls in der Regel aus Aluminium.The one preferably used to form the tubular body Finned tube is also usually made of aluminum.

Der erfindungsgemäße Wärmetauscher ist vorzugsweise für kleinere Leistungen bis ca. 30 kW ausgelegt. Die erfindungsgemäße Konstruktion ist jedoch auf diese Leistungen nicht beschränkt.The heat exchanger according to the invention is preferably for smaller powers up to approx. 30 kW. The However, construction according to the invention is based on these performances not limited.

Bei einer vorteilhaften Ausführungsform ist der durch den Rohrköprer definierte Hohlraum an einer Stirnseite durch ein scheibenförmiges Abschlußblech, durch das sich der Brenner hindurcherstreckt, und an der gegenüberliegenden Stirnseite durch einen in den Hohlraum hineinragenden topfförmigen Einsatz begrenzt. Zwischen diesem topfförmigen Einsatz und dem äußeren Blechmantel wird ein durch das wendelförmig gebogene Rohr, insbesondere Rippenrohr ausgefüllter Ringraum definiert, der in einen Rauchgassammler mündet.In an advantageous embodiment, the is by Rohrköprer defined a cavity on one face disc-shaped end plate through which the burner passes stretched through, and on the opposite end through a pot-shaped insert protruding into the cavity limited. Between this pot-shaped insert and the outer one Sheet metal jacket becomes a through the helically bent tube, in particular finned tube filled annular space defined in opens a flue gas collector.

Diese Konstruktion führt zu einem hohen primären Wärmeübergang durch Strahlung sowie hohen sekundären Wärmeübergang durch Strömung von heißen Rauchgasen durch das wendelförmig gebogene Rippenrohr des Rohrkörpers hindurch, wobei bei aufrechter Anordnung des Rohrkörpers die Rauchgase vorzugsweise von oben nach unten strömen. Die Führung des Wassers im Rippenrohr erfolgt im Gegenstrom zur Rauchgasströmung, d. h. bei letzgenannter Anordnung von unten nach oben.This construction leads to a high primary heat transfer due to radiation and high secondary heat transfer Flow of hot smoke gases through the helically curved Finned tube of the tube body, with upright Arrangement of the pipe body, the flue gases preferably from above flow down. The guidance of the water in the finned tube takes place in counterflow to the flue gas flow, d. H. at latter arrangement from bottom to top.

Wie bereits oben erwähnt, ist die eine Blechmantelhälfte am Gehäuse des Heizkessels oder dergleichen Gerätes befestigt, wobei sich im montierten Zustand durch diese Mantelhälfte Vor- und Rücklauf des wendelförmig gebogenen Rohres hindurch und in mit dem Wasserkreislauf in Verbindung stehende Aufnahmeöffnungen hineinerstrecken, innerhalb denen Vor- und Rücklauf mit Dichtsitz verankerbar sind. Diese Ausführungsform begünstigt die Montage und Demontage des wendelförmig gebogenen Wärmetauscherrohres bzw. Rohrkörpers.As already mentioned above, one half of the sheet metal jacket is on Housing of the boiler or similar device attached, whereby in the assembled state this half of the jacket and return of the helically bent tube through and in related to the water cycle Extend receptacle openings within which forward and Return can be anchored with a sealing seat. This embodiment favors the assembly and disassembly of the helically curved Heat exchanger tube or tube body.

Der topfartige Einsatz liegt ähnlich wie der äußere Blechmantel an der Außenseite eng an der Innenseite des Rohrkörpers an, und zwar derart, daß bei Bedarf der topfartige Einsatz relativ zum Rohrkörper axial verschiebbar ist. Damit läßt sich die Brennkammerlänge in einfacher Weise optimal einstellen.The pot-like insert is similar to the outer sheet metal jacket on the outside closely to the inside of the tubular body, and in such a way that the pot-like use relative to Tube body is axially displaceable. So that the Optimally adjust the combustion chamber length in a simple manner.

Wie ebenfalls bereits oben angedeutet, ist es bei der erfindungsgemäßen Konstruktion möglich, den äußeren Blechmantel radial vorzuspannen, d. h. unter radialer Vorspannung an der Außenseite des Rohrkörpers anzulegen. Zu diesem Zweck sind dem äußeren Blechmantel gesonderte Spannmittel zugeordnet, die vorzugsweise Einrichtungen zur Einstellung der radialen Vorspannung aufweisen. Es kann sich bei den Spannmitteln um Schnallenverschlüsse entsprechend den Schnallenverschlüssen von Skistiefeln oder dergleichen handeln. Alternativ können als Spannmittel auch Spannbänder mit Kniehebelverschlüssen verwendet werden, die nach Art einer Rohrschelle um den gesamten Umfang des Blechmantels herumgelegt werden.As also indicated above, it is with the Construction according to the invention possible, the outer sheet metal jacket preload radially, d. H. under radial preload on the Outside of the tube body. For this purpose separate clamping means assigned to the outer sheet metal jacket preferably means for adjusting the radial Have preload. The clamping devices can be Buckle closures according to the buckle closures of Act ski boots or the like. Alternatively, as Clamping devices also include straps with toggle locks can be used in the manner of a pipe clamp around the the entire circumference of the sheet metal jacket.

Die beiden Blechmantelhälften sind im montierten Zustand vorzugsweise in Axialrichtung sich tangential überlappend ausgebildet, wobei im Überlappungsbereich der beiden Blechmantelhälften jeweils ein Dichtstreifen, insbesondere aus Silikon oder dergleichen wärmebeständigem Material angeordnet ist. Alternativ ist eine sogenannte Labyrinth-Abdichtung ohne gesonderten Dichtstreifen möglich.The two sheet metal jacket halves are in the assembled state preferably tangentially overlapping in the axial direction formed, being in the overlap area of the two Sheet metal jacket halves each have a sealing strip, in particular Silicone or the like heat-resistant material arranged is. Alternatively, a so-called labyrinth seal is without separate sealing strips possible.

Die Befestigung der einen Blechmantelhälfte am Gehäuse des Heizkessel oder dergleichen Gerätes erfolgt bei einer bevorzugten Ausführungsform über Blockelemente, insbesondere L-förmig ausgebildete Blockelemente, die jeweils eine der Wölbung der Blechmantelhälfte entsprechende Anlagefläche aufweisen. Die Anlageflächen der dem Vor- und Rücklauf zugeordneten Blockelemente umfassen jeweils noch eine Aufnahmeöffnung, insbesondere Aufnahmebohrung für den Vor- und Rücklauf des Rohrkörpers bzw. für die dem Vor- und Rücklauf zugeordneten Rohrstutzen. Über die erwähnten Aufnahmeöffnungen ist eine Verbindung zwischen Rohrkörper und Wasserkreislauf herstellbar. Die Blockelemente dienen also zur Befestigung des hinteren Blechmantels sowie zur Aufnahme des Wärmetauschers.The attachment of a sheet metal jacket half to the housing of the Boiler or similar device takes place at one preferred embodiment via block elements, in particular L-shaped trained block elements, each one of the curvature have the corresponding contact surface of the sheet metal jacket half. The Contact surfaces of the flow and return assigned Block elements each also include a receiving opening, in particular mounting hole for the forward and return of the Tubular body or for those assigned to the flow and return Pipe socket. One is above the receiving openings Connection between pipe body and water circuit can be established. The block elements are used to attach the rear Sheet metal jacket as well as for holding the heat exchanger.

Bezüglich konstruktiver Details der erwähnten Aufnahmebohrungen sowie der Fixierung von Vor- und Rücklauf in diesen wird auf die Ansprüche 12 bis 13 verwiesen.Regarding the constructional details of the mounting holes mentioned as well as the fixation of forward and reverse in this is on referred to claims 12 to 13.

Die erwähnten Blockelemente sind vorzugsweise aus Aluminium hergestellt und weisen eine L-förmige Grundform auf.The block elements mentioned are preferably made of aluminum manufactured and have an L-shaped basic shape.

Nachstehend wird eine bevorzugte Ausführungsform eines erfindungsgemäßen Wärmetauschers anhand der beigefügten Zeichnungen näher erläutert. Es zeigen:

Figur 1
einen Heizkessel mit einem erfindungsgemäß ausgebildeten Heizwasser-Wärmetauscher in perspektivischer Ansicht, wobei die vordere Abdeckung von Heizkessel und Wärmetauscher abgenommen sind;
Figur 2
den erfindungsgemäß ausgebildeten Wärmetauscher in perspektivischer Ansicht;
Figur 3
den Wärmetauscher gemäß Figur 1 bzw. Figur 2 im schematischen Längsschnitt;
Figur 4
einen Teil des erfindungsgemäß ausgebildeten Wärmetauschers in Seitenansicht (Rippenrohr);
Figur 5
ein Blockelement zur Befestigung des Wärmetauschers am Gehäuse des Heizkessels im Längsschnitt;
Figur 6
das Blockelement gemäß Figur 5 in Draufsicht.
A preferred embodiment of a heat exchanger according to the invention is explained in more detail below with reference to the accompanying drawings. Show it:
Figure 1
a boiler with a heating water heat exchanger designed according to the invention in a perspective view, wherein the front cover of the boiler and heat exchanger are removed;
Figure 2
the heat exchanger designed according to the invention in a perspective view;
Figure 3
the heat exchanger according to Figure 1 or Figure 2 in schematic longitudinal section;
Figure 4
a part of the heat exchanger designed according to the invention in side view (finned tube);
Figure 5
a block element for attaching the heat exchanger to the housing of the boiler in longitudinal section;
Figure 6
the block element of Figure 5 in plan view.

In Figur 1 ist in schematischer Perspektivansicht ein Gasheizgerät nach dem Kondensationsprinzip, nämlich eine sogenannte wandhängende Gasbrennwerttherme 10 mit einem Gehäuse 11, von dem nur die Rückwand und die Seitenwände dargestellt sind sowie einem Wärmetauscher 12 in perspektivischer Ansicht gezeigt. Der Wärmetauscher 12 umfaßt ein zu einem hohlzylindrischen Rohrkörper 13 wendelförmig gebogenes Rohr, nämlich Rippenrohr 14 mit in Figur 2 näher dargestelltem Vorlauf 15 und Rücklauf 16, über die der Rohrkörper 13 in einen in den Figuren nicht näher dargestellten Wasserkreislauf einfügbar ist. Ein Teil des Wasserkreislaufes ist in Figur 1 gezeigt mit dem Rücklaufrohr 17 und einer im Rücklaufrohr integrierten Heizwasserpumpe 18.In Figure 1 is a schematic perspective view Gas heater based on the condensation principle, namely a so-called wall-hung gas condensing boiler 10 with a housing 11, of which only the rear wall and the side walls are shown are and a heat exchanger 12 in a perspective view shown. The heat exchanger 12 comprises one to one hollow cylindrical tube body 13 helically bent tube, namely finned tube 14 with shown in more detail in Figure 2 Forward 15 and return 16, via which the tubular body 13 in one water cycle not shown in the figures is insertable. Part of the water cycle is shown in Figure 1 shown with the return pipe 17 and one in the return pipe integrated heating water pump 18.

Der hohlzylindrische Rohrkörper ist konzentrisch um einen in Figur 3 schematisch dargestellten Gasbrenner 19 bzw. dessen Flamme herum angeordnet. In Figur 1 ist der obere Teil des Brenners 19 noch erkennbar. Der Brenner 19 erstreckt sich also bei der in den Figuren dargestellten Gastherme von oben her konzentrisch in den hohlzylindrischen Rohrkörper 13 hinein. Dem Brenner 19 ist ein Gebläse 20 vorgeordnet, welches ein Brenngas-Luft-Gemisch zum Brenner 19 fördert, und zwar durch eine Brenngas-Luft-Leitung 21 hindurch. In das Gebläse 20 mündet eine Gaszufuhrleitung 22. Die Luftbeimischung aus der Umgebung ist in Figur 1 mit dem Pfeil 23 angedeutet. Der Rohrkörper 13 ist innerhalb eines zylindrischen Blechmantels bestehend aus zwei voneinander trennbaren Mantelhälften 24, 25 (siehe Figur 2) unter dichter Anlage an der Innenseite dieser beiden Mantelhälften plaziert. Die beiden Mantelhälften 24, 25 definieren im montierten Zustand einen zylindrischen Blechmantel 26, der Teil eines dem Brenner 19 und als Wärmetauscher dienenden Rohrkörper 13 einschließenden Brennkammergehäuses ist. Im übrigen wird dieses Gehäuse an der oberen Stirnseite durch ein scheibenförmiges Abschlußblech 27, durch das sich der Brenner 19 hindurcherstreckt, und an der unteren bzw. gegenüberliegenden Stirnseite durch einen in den durch den Rohrkörper 13 definierten Hohlraum 28 hineinragenden topfförmigen Einsatz 29 mit Ringflansch 30 zum dichten Anschluß der erwähnten Blechmantelhälften 24, 25. Unterhalb des topfförmigen Einsatzes 29 ist ein Abgassammler 31 angeordnet, der mit einem Abgasrohr 32 in Verbindung steht. Im Abgassammler 31 wird etwaiges Kondensat aufgefangen und abgeführt. Die entsprechende Einrichtung (Syphon) ist in Figur 1 mit der Bezugsziffer 33 dargestellt. Da es sich hierbei um eine an sich bekannte Konstruktion handelt, erübrigt sich hier eine nähere Beschreibung derselben.The hollow cylindrical tube body is concentric around an in Figure 3 schematically shown gas burner 19 or its Flame arranged around. In Figure 1, the upper part of the Brenners 19 still recognizable. The burner 19 thus extends in the gas boiler shown in the figures from above concentrically into the hollow cylindrical tubular body 13. The Burner 19 is preceded by a fan 20, which is a Fuel gas-air mixture to the burner 19 promotes, namely a fuel gas-air line 21 therethrough. In the blower 20 opens a gas supply line 22. The air admixture from the The environment is indicated by the arrow 23 in FIG. 1. The Tube body 13 is inside a cylindrical sheet metal jacket consisting of two separable jacket halves 24, 25 (see Figure 2) under close contact on the inside of this placed on both halves of the coat. The two jacket halves 24, 25 define a cylindrical when assembled Sheet metal jacket 26, the part of the burner 19 and as Heat exchanger serving tubular body 13 including Combustion chamber housing is. Otherwise, this housing on the upper end face through a disc-shaped end plate 27, through which the burner 19 extends, and on the lower or opposite end face by a in the protruding through the tubular body 13 defined cavity 28 pot-shaped insert 29 with ring flange 30 for tight connection of the mentioned sheet metal jacket halves 24, 25. Below the a cup-shaped insert 29, an exhaust manifold 31 is arranged, which is connected to an exhaust pipe 32. In the exhaust collector 31 any condensate is collected and discharged. The corresponding device (siphon) is in Figure 1 with the Reference numeral 33 shown. Since this is one in itself known construction, there is no need here Description of the same.

Wie insbesondere Figur 3 sehr gut erkennen läßt, ist zwischen dem topfförmigen Einsatz 29 und dem äußeren Blechmantel 26 ein durch das wendelförmig gebogene Rippenrohr 14 ausgefüllter Ringraum 34 definiert, der in den Rauchgassammler 31 mündet. Die entsprechende Rauchgasströmung ist in Figur 3 mit den Pfeilen 35 angedeutet.As can be seen particularly well in FIG. 3, there is between the cup-shaped insert 29 and the outer sheet metal jacket 26 filled by the helically bent finned tube 14 Annular space 34 defined, which opens into the flue gas collector 31. The corresponding flue gas flow is shown in FIG Arrows 35 indicated.

Der topfförmige Einsatz 29 liegt eng an der Innenseite des Rohrkörpers 13 an, und zwar derart, daß er bei Bedarf relativ zu diesem axial verschiebbar ist. Auf diese Weise läßt sich die Länge der Brennkammer 36 bei Bedarf einstellen. Darüberhinaus ist diese axiale Verschiebbarkeit natürlich erforderlich zum Zwecke der Montage und Demontage für den Fall einer Revision oder Reinigung des Rohrkörpers 13.The cup-shaped insert 29 is close to the inside of the Tubular body 13, in such a way that it is relative when needed is axially displaceable to this. In this way, the Adjust the length of the combustion chamber 36 if necessary. Furthermore this axial displacement is of course necessary for Purposes of assembly and disassembly in the event of a revision or cleaning the tubular body 13.

Zur Erhöhung des Wirkungsgrades sind Vorkehrungen getroffen, um den äußeren Blechmantel 26 bzw. die beiden Blechmantelhälten 24, 25 unter radialer Vorspannung an der Außenseite des Rohrkörpers 13 anzulegen. Zu diesem Zweck ist der äußere Blechmantel 26 mittels gesonderter und hier nicht näher dargestellter Spannmittel radial gegen den Rohrkörper 13 drückbar. Die Spannmittel weisen vorzugsweise noch Einrichtungen zur Einstellung der radialen Vorspannung auf. Vorzugsweise dienen als Spannmittel Schnallenverschlüsse, wie sie zum Beispiel bei Skischuhen verwendet werden. Auch sind Spannbänder denkbar, die nach Art einer Rohrschelle um den Blechmantel 26 herumgelegt und festgezogen werden. Auf diese Weise lassen sich auch Fertigungstoleranzen und Wärmespannungen des Rohrkörpers 13 kompensieren. Es wird ein gleichmäßiges Anliegen des Rohrkörpers 13 an dem die Brennkammerwand definierenden Blechmantel 26 gewährleistet.Precautions have been taken to increase efficiency the outer sheet metal jacket 26 or the two sheet metal jacket halves 24, 25 under radial prestress on the outside of the To create tubular body 13. For this purpose, the outside Sheet metal jacket 26 by means of separate and not here illustrated clamping means radially against the tubular body 13 pushable. The clamping means preferably still have Devices for adjusting the radial preload. Buckle fasteners, such as they are used for example in ski boots. Also are Conceivable straps that like a pipe clamp around the Sheet metal jacket 26 are put around and tightened. To this Manufacturing tolerances and thermal stresses can also be done in this way compensate for the tubular body 13. It becomes an even one Bearing of the tubular body 13 on the combustion chamber wall defining sheet metal jacket 26 guaranteed.

Die eine Blechmantelhälfte, nämlich hier die Blechmantelhälfte 24, ist am Gehäuse 11 des Heizkessels bzw. der Gastherme 10, und zwar konkret an deren Rückwand befestigt, wobei sich im montierten Zustand durch diese Mantelhälfte Vor- und Rücklauf des wendelförmig gebogenen Rippenrohrs 14 hindurch und in mit dem Wasserkreislauf in Verbindung stehende Aufnahmeöffnungen hineinerstrecken, innerhalb denen Vor- und Rücklauf mit Dichtsitz verankerbar sind. Die entsprechenden Durchgangsstutzen für Vor- und Rücklauf des Rohrkörpers 13 in der Blechmantelhälfte 24 sind in Figur 2 mit den Bezugsziffern 37 und 38 gekennzeichnet. Vor- und Rücklauf des Rohrkörpers 13 sind durch entsprechende Rohrstutzen definiert, die sich im montierten Zustand durch die Durchgangsstutzen 37, 38 der Blechmantelhälfte 24 hindurcherstrecken. Die den Vor- und Rücklauf definierenden Rohrstutzen erstrecken sich im montierten Zustand des Rohrkörpers 13 etwa senkrecht zur Rückwand des Gehäuses 11 der Gastherme 10. Dadurch ist es möglich, nach Entfernung der vorderen Blechmantelhälfte 25 den Rohrkörper 13 nach vorne abzuziehen. Bei dieser Gelegenheit werden die den Vor- und Rücklauf definierenden Rohrstutzen aus den zugeordneten Aufnahmeöffnungen zum Anschluß an den Wasserkreislauf herausgezogen. Die Montage des Rohrkörpers 13 erfolgt in umgekehrter Richtung.One sheet metal jacket half, namely here the sheet metal jacket half 24, is on the housing 11 of the boiler or gas boiler 10, specifically attached to the back wall, whereby in assembled condition through this jacket half forward and return of the helically bent finned tube 14 through and in with intake openings connected to the water cycle stretch in, within which forward and reverse with Sealing seat can be anchored. The corresponding Passage socket for forward and return of the tubular body 13 in the sheet metal jacket half 24 are in Figure 2 with the reference numerals 37 and 38 marked. Forward and return flow of the tubular body 13 are defined by corresponding pipe sockets, which are in the assembled state through the passage socket 37, 38 of the Extend the sheet metal jacket half 24. The the pre and Return pipe stub extend in the assembled state of the tubular body 13 approximately perpendicular to Back wall of the housing 11 of the gas boiler 10. This is it possible, after removing the front sheet metal jacket half 25 den Pull the tubular body 13 forward. On this occasion are the pipe sockets that define the flow and return the associated receiving openings for connection to the Water circuit pulled out. The assembly of the tubular body 13 takes place in the opposite direction.

Bei der Ausführungsform nach Figur 2 weisen die beiden Blechmantelhälften jeweils radial wegstehende Axialstege 39, 40 auf. Diese Axialstege dienen zur Verbindung der beiden Blechmantelhälften 24, 25. Bei dieser Konstruktion ist es nur bedingt möglich, die beiden Blechmantelhälften an die Außenseite des Rohrkörpers 13 zu drücken. Zu diesem Zweck müßte ein relativ dicker Dichtstreifen aus elastischem Dichtmaterial, insbesondere Silikon, zwischen den aneinanderliegenden Axialstegen 39, 40 der beiden Blechmantelhälften angeordnet werden. Nur so ließen sich die beiden Blechmantelhälften radial vorspannen unter entsprechend dichter Anlage an der Außenseite des Rohrkörpers 13.In the embodiment of Figure 2, the two Sheet metal jacket halves each have radially projecting axial webs 39, 40 on. These axial webs serve to connect the two Sheet metal jacket halves 24, 25. With this construction it is only conditionally possible, the two sheet metal jacket halves to the Press outside of the tubular body 13. For this purpose you should a relatively thick sealing strip made of elastic sealing material, especially silicone, between the adjacent ones Axial webs 39, 40 of the two sheet metal jacket halves arranged become. Only in this way could the two sheet metal jacket halves be radial preload under a correspondingly tight system on the outside of the tubular body 13.

Eleganter ist in dieser Beziehung eine Lösung, bei der die beiden Blechmantelhälften 24, 25 im montierten Zustand in Axialrichtung sich tangential überlappend ausgebildet sind. Die dann im Überlappungsbereich angeordnete Dichtung kann relativ dünn ausgebildet sein, zum Beispiel in Form eines dünnen Silikon-Dichtstreifens. Alternativ bilden die jeweils einander zugeordneten Längsränder der beiden Blechmantelhälften eine Labyrinth-Dichtung ohne gesonderten Dichtstreifen. Zu diesem Zweck ist der eine Längsrand zu einer V-förmigen Längsnut verformt, in die der gegenüberliegende Längsrand eingepaßt wird.A more elegant solution is a solution in which the two sheet metal jacket halves 24, 25 in the assembled state in Axial direction are tangentially overlapping. The then the seal arranged in the overlap area can be relative be thin, for example in the form of a thin one Silicone sealing strip. Alternatively, they form each other associated longitudinal edges of the two sheet metal jacket halves one Labyrinth seal without a separate sealing strip. To this The purpose is the one longitudinal edge to a V-shaped longitudinal groove deformed, into which the opposite longitudinal edge is fitted becomes.

Wie bereits oben dargelegt, ist die eine Blechmantelhälfte 24 am Gehäuse der Gastherme, nämlich an der Rückwand derselben befestigt, und zwar vorzugsweise über Blockelemente 41, die jeweils eine der Wölbung der Blechtmantelhälfte 24 entsprechende Anlagefläche 42 aufweisen. Im vorliegenden Fall dienen zur Befestigung der Blechmantelhälfte 24 nur zwei relativ zu dieser diagonal angeordnete Blockelemente 41, die dem Vor- und Rücklauf 15, 16 des Rohrkörpers 13 zugeordnet sind. In den Anlageflächen 42 dieser beiden Blockelemente 41 sind Aufnahmeöffnungen, insbesondere Aufnahmebohrungen 43 für den Vor- und Rücklauf 15, 16 bzw. die entsprechenden Rohrstutzen ausgebildet, über die eine Verbindung zwischen Rohrkörper 13 und dem Wasserkreislauf herstellbar ist. Die erwähnten Aufnahmebohrungen 43 für den Vor- und/oder Rücklauf bzw. die entsprechenden Rohrstutzen weisen jeweils eine Ringnut 44 zur Plazierung eines die erwähnten Rohrstutzen dicht umschließenden Dichtrings, insbesondere O-Rings auf. In Figur 5 ist die linke Hälfte eines derartigen O-Rings 45 dargestellt. Die dem Vor- und/oder Rücklauf zugeordneten Rohrstutzen sind innerhalb der Aufnahmebohrungen 43 durch einen sich tangential durch den Kontaktbereich zwischen Rohrstutzen und Aufnahmebohrung hindurcherstreckenden Stift 46 oder dergleichen innerhalb der Aufnahmebohrung 43 gehalten. Vorzugsweise ist der Stift 46 Teil einer Klammer, die nach Art einer Haarspange ausgebildet ist. Der eine Schenkel dieser Klammer definiert den erwähnten Haltestift 46, während der andere Schenkel an der Außenfläche des Blockelements 41 anliegt derart, daß der Haltestift 46 gesichert wird.As already explained above, this is a sheet metal jacket half 24 on the housing of the gas boiler, namely on the rear wall of the same attached, preferably via block elements 41, the in each case one of the curvatures of the sheet metal jacket half 24 have corresponding contact surface 42. In the present case are used to attach the sheet metal jacket half 24 only two relative to this diagonally arranged block elements 41, the assigned to the forward and return 15, 16 of the tubular body 13 are. In the contact surfaces 42 of these two block elements 41 are receiving openings, in particular receiving bores 43 for the forward and reverse 15, 16 and the corresponding Pipe socket formed through which a connection between Tubular body 13 and the water circuit can be produced. The mentioned receiving holes 43 for the forward and / or return or the corresponding pipe socket each have an annular groove 44 for placing one of the mentioned pipe sockets tight enclosing sealing ring, in particular O-rings. In Figure 5 the left half of such an O-ring 45 is shown. The pipe sockets assigned to the supply and / or return are within the receiving holes 43 by a tangential through the contact area between pipe socket and Receiving hole extending pin 46 or the like held within the receiving bore 43. Preferably, the Pin 46 part of a clip, like a barrette is trained. One leg of this bracket defines that mentioned retaining pin 46, while the other leg on the Outer surface of the block member 41 abuts such that the Retaining pin 46 is secured.

Die Aufnahmebohrung 43 für den dem Vor- oder Rücklauf zugeordneten Rohrstutzen mündet in eine innerhalb des zugeordneten Blockelements 41 ausgebildete Anschlußbohrung 47 für den Wasserkreislauf. Die Anschlußbohrung 47 ist Teil eines Anschluß-Rohrstutzens 48. Dieser Anschluß-Rohrstutzen 48 ist integraler Teil des Blockelements 41. Die Aufnahmebohrung 43 und Anschlußbohrung 47 schneiden sich innerhalb des L-förmigen Blockelements 41 im rechten Winkel.The receiving hole 43 for the forward or return assigned pipe socket opens into a within the associated block element 41 formed connection bore 47th for the water cycle. The connection bore 47 is part of a Connection pipe socket 48. This connection pipe socket 48 is integral part of the block element 41. The receiving bore 43 and connection bore 47 intersect within the L-shaped Block element 41 at a right angle.

Die Befestigung des Blockelements 41 erfolgt durch eine Befestigungsschraube, die sich durch eine zugeordnete Schraubbohrung 49 im Blockelement 41 hindurcherstreckt. Diese Schraube dient gleichzeitig zur Befestigung der an der Anlagefläche 42 abgestützten Blechmantelhälfte 24, die in Figur 5 mit unterbrochener Linie angedeutet ist.The block element 41 is attached by a Fastening screw, which is assigned by an Screw hole 49 extends in the block element 41. This Screw is also used to attach the to the Contact surface 42 supported sheet metal jacket half 24, which is shown in FIG 5 is indicated with a broken line.

Es versteht sich von selbst, daß auch im Anschlußbereich zwischen zylindrischen Blechmantel 26 und den stirnseitigen Abdeckelementen der Brennkammer 36 Dichtelemente, insbesondere ringförmige Dichtstreifen aus Silikon oder dergleichen hitzebeständigem Material angeordnet sind. Damit wird ein hermetisch abgedichtetes Brennkammergehäuse geschaffen.It goes without saying that also in the connection area between cylindrical sheet metal jacket 26 and the front Cover elements of the combustion chamber 36 sealing elements, in particular annular sealing strips made of silicone or the like heat-resistant material are arranged. So that becomes a hermetically sealed combustion chamber housing created.

Der Gasbrenner 19 ermöglicht vorzugsweise eine modulierend geregelte Leistungsanpassung durch entsprechende Ansteuerung des oben erwähnten Gebläses 20. The gas burner 19 preferably enables a modulating regulated power adjustment by appropriate control of the above-mentioned blower 20.

Die beschriebene Konstruktion eignet sich besonders gut für Wärmetauscher-Rohrkörper 13 mit einem Außendurchmesser von bis zu etwa 200 mm.The construction described is particularly suitable for Heat exchanger tube body 13 with an outer diameter of up to to about 200 mm.

Es ist auch denkbar, die vordere Blechmantelhälfte 25 über ein Scharnier an der mit dem Gehäuse 11 der Gastherme verbundenen Blechmantelhälfte anzulenken, so daß die vordere Blechmantelhälfte 25 zum Zwecke der Montage und Demontage des Rohrkörpers 13 lediglich nach vorne und zur Seite weggeklappt werden muß. Die Scharnierachse erstreckt sich längs einer Axialline des Blechmantels.It is also conceivable to use the front sheet metal jacket half 25 Hinge on the connected to the housing 11 of the gas boiler Articulate the sheet metal jacket half so that the front Sheet metal jacket half 25 for the purpose of assembling and disassembling the Tube body 13 only folded forward and to the side must become. The hinge axis extends along one Axial line of the sheet metal jacket.

Der Blechmantel hat eine Wandstärke von etwa 0,5 bis 1,5 , insbesondere etwa 1,0 mm und besteht aus Aluminium oder einer Aluminiumlegierung. Es handelt sich hier um eine ausgeprägte Leichtbaukonstruktion, was für wandhängende Gasthermen von Bedeutung ist. The sheet metal jacket has a wall thickness of approximately 0.5 to 1.5, in particular about 1.0 mm and consists of aluminum or one Aluminum alloy. It is a pronounced one Lightweight construction, what kind of wall-hung gas heaters from Meaning is.

BezugszeichenlisteReference list

1010th
GasthermeGas boiler
1111
Gehäusecasing
1212th
WärmetauscherHeat exchanger
1313
RohrkörperTubular body
1414
RippenrohrFinned tube
1515
Vorlaufleader
1616
RücklaufRewind
1717th
RücklaufrohrReturn pipe
1818th
HeizwasserpumpeHeating water pump
1919th
GasbrennerGas burner
2020th
Gebläsefan
2121
Gas-Luft-LeitungGas-air line
2222
GaszufuhrleitungGas supply line
2323
Pfeil (Luftzufuhr)Arrow (air supply)
2424th
BlechmantelhälfteHalf of the sheet metal jacket
2525th
BlechmantelhälfteHalf of the sheet metal jacket
2626
BlechmantelSheet metal jacket
2727
AbschlußblechEnd plate
2828
Hohlraum (= Brennkammer)Cavity (= combustion chamber)
2929
topfartiger Einsatzpot-like use
3030th
RingflanschRing flange
3131
AbgassammlerExhaust collector
3232
AbgasrohrExhaust pipe
3333
Kondensat-Abführeinrichtung (Syphon)Condensate discharge device (siphon)
3434
RingraumAnnulus
3535
Pfeil (Abgasführung)Arrow (exhaust system)
3636
BrennkammerCombustion chamber
3737
DurchgangsstutzenThrough socket
3838
DurchgangsstutzenThrough socket
3939
AxialstegAxial web
4040
AxialstegAxial web
4141
BlockelementBlock element
4242
AnlageflächeContact surface
4343
AufnahmebohrungLocation hole
4444
RingnutRing groove
4545
O-RingO-ring
4646
HaltestiftRetaining pin
4747
AnschlußbohrungConnection hole
4848
AnschlußrohrstutzenConnection pipe socket
4949
SchraubbohrungScrew hole

Claims (14)

  1. Heat exchanger (12) for a heating boiler, in particular for a gas fired wall hanging boiler (10), that comprises to the concentric order around a burner (19) or rather its flame a spirally to a hollow- cylindrical pipe body (13) bent pipe, in particular ribbed pipe (14), with flow (15) and return pipe (16), which enable to fit the pipe body (13) into a water cycle,
    characterized by
    a cylindrical sheet metal jacket (26) consisting of two of each other separable jacket- halves (24, 25) within that or rather those the pipe body (13) can be placed with small distance, in particular under close installation to them.
  2. Heat exchanger according to claim 1,
    characterized in that
    the combustion chamber (28), which is defined by the pipe body (13) is demarcated, at the one front side by a discoid armature endplate (27), through which the gas burner reaches (19), and at the opposite front side by a cylindrical displacer (29) projecting into the combustion chamber (28).
  3. Heat exchanger according to claim 2,
    characterized in that
    a ring- like space (34) is defined between the cylindrical displace (29) and the external sheet metal jacket (26), which is filled out by the spirally bent pipe, in particular ribbed pipe (14), and that leads into a flue gas collector (31).
  4. Heat exchanger according to one of the claims 1 to 3,
    characterized by
    the one sheet metal jacket- half (24) being attached to the case (11) of the gas fired wall hanging boiler (10) or the like, and after assembly the flow (15) and the return pipe (16) or the corresponding pipe sockets of the spirally bent pipe respectively, in particular of the ribbed pipe (14), reach through this jacket- half (24) and into the locating orifices, which are connected with the water cycle and within those the flow and the return pipe, or the corresponding pipe sockets respectively, can be tightly closing fixed.
  5. Heat exchanger according to one of the claims 2 to 4,
    characterized by
    the cylindrical displacer (29) fitting closely at the inside of the pipe body (13) in such a way, that it is axially movable relatively to this if required.
  6. Heat exchanger according to one of the claims 1 to 5,
    characterized in that
    the external sheet metal jacket (26) is possibility under radial initial tension on the outside of the pipe body (13).
  7. Heat exchanger according to claim 6,
    characterized in that
    the external sheet metal jacket (26) is radially pressable against the pipe body (13) due to separate means of tension, which act in particular tangentially.
  8. Heat exchanger according to claim 7,
    characterized in that
    the means of tension comprise appliances for adjusting the radial initial tension.
  9. Heat exchanger according to one of the claims 1 to 8,
    characterized by
    the two sheet metal jacket- halves (24, 25) being shaped tangentially overlapping in axial direction after assembly.
  10. Heat exchanger according to claims 9,
    characterized in that
    a seal in each case, particularly a silicone stripe, is located in the region, where the two sheet metal jacket-halves (24, 25) are overlapping.
  11. Heat exchanger according to one of the claims 1 to 10,
    characterized by
    the fastening of one of the two sheet metal jacket- halves (24) to the case (11) of the gas
    fired wall hanging boiler (10) or the like is made with block elements (41), which comprise in each case a bearing surface (42) corresponding to the surface curvature of the sheet metal jacket- half (24), and the bearing surfaces of the block elements, which are assigned to the flow (15) and the return pipe (16), comprise each a locating orifice, in particular a location hole (43), for the flow (15) or the return pipe (16) of the pipe body (13) or the corresponding pipe sockets of the flow and the return pipe respectively, whereby a combination between the pipe body (13) and the water cycle can be established.
  12. Heat exchanger according to claim 11,
    characterized in that
    the location holes (43) for the flow (15) and the return pipe (16) ,or the corresponding pipe sockets respectively, comprise each a ring groove (44) to place a conical nipple, in particular a 0- ring (45), which encloses them tightly.
  13. Heat exchanger according to claim 11 or 12,
    characterized in that
    the pipe sockets, being assigned to the flow (15) and the return pipe (16), inside the location holes of the in each case assigned block elements (41) are hold inside the location holes (43) by a pin (46) or the like, which reaches tangentially through the contact area between the pipe sockets and the location holes.
  14. Heat exchanger according to one of the claim 11 to 13,
    characterized in that
    a connecting hole (47) for the water cycle, which is shaped inside the assigned block element (41), leads into the location hole (43) for the pipe socket, which is assigned to the flow (15) or the return pipe (16) respectively.
EP97111875A 1996-08-23 1997-07-11 Heat exchanger for a boiler,esp.for a wall mounted gas fired boiler Expired - Lifetime EP0825392B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19634200 1996-08-23
DE19634200A DE19634200A1 (en) 1996-08-23 1996-08-23 Heat exchanger for a boiler, especially a wall-hung gas boiler

Publications (3)

Publication Number Publication Date
EP0825392A2 EP0825392A2 (en) 1998-02-25
EP0825392A3 EP0825392A3 (en) 1999-03-24
EP0825392B1 true EP0825392B1 (en) 2001-10-31

Family

ID=7803561

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97111875A Expired - Lifetime EP0825392B1 (en) 1996-08-23 1997-07-11 Heat exchanger for a boiler,esp.for a wall mounted gas fired boiler

Country Status (3)

Country Link
EP (1) EP0825392B1 (en)
AT (1) ATE208027T1 (en)
DE (2) DE19634200A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19940222B4 (en) * 1998-08-25 2009-12-31 Vaillant Gmbh water heater
DE10121635A1 (en) * 2001-05-03 2002-11-14 Heatec Thermotechnik Gmbh Aluminum heating cartridge for a heating device and wear detection process
ES2279848T3 (en) * 2001-07-23 2007-09-01 Vaillant Gmbh THERMAL ADSORTION PUMP.
DE20211414U1 (en) * 2002-07-12 2002-11-07 Man B & W Diesel Ag Heat generator, in particular wall-hung condensing boiler surrounded by a housing
DE10242643B4 (en) * 2002-09-13 2004-12-02 Heatec Thermotechnik Gmbh Water heaters, in particular for heating purposes
AT412913B (en) * 2003-01-27 2005-08-25 Vaillant Gmbh Helical heat exchanger used in a heating device comprises a region in which an inlet enters the helix and a region in which an outlet exits the helix which do not overlap when viewed in the direction of the central axis of the helix
DE10341644B4 (en) 2002-09-16 2021-09-23 Vaillant Gmbh Helical heat exchanger
FR2853399B1 (en) * 2003-04-04 2005-06-03 Geminox HEAT EXCHANGER HELICOIDAL AND BOILER EQUIPPED WITH SUCH EXCHANGER
FR2853398B1 (en) * 2003-04-04 2005-08-19 Geminox HELICOIDAL HEAT EXCHANGER WITH FINS AND BOILER EQUIPPED WITH SUCH EXCHANGER
EP2133634B1 (en) * 2008-06-11 2015-04-01 Aic S.A. Fire heat exchanger for liquid heaters
ITMI20130401A1 (en) * 2013-03-18 2014-09-19 Baxi Spa PERFECTED HEAT EXCHANGER FOR BOILER
PL3663689T3 (en) * 2018-12-07 2022-06-20 Intellihot, Inc. Heat exchanger

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE893395C (en) * 1942-05-27 1953-10-15 Junkers & Co Coating housing for liquid heater consisting of two shell-like drawn parts
NL8304041A (en) * 1983-11-24 1985-06-17 Remeha Fabrieken Bv BOILER WITH VERTICAL BURNER TUBE.
IE58600B1 (en) * 1986-11-18 1993-10-20 Grant Stephen William John A boiler housing
US5131351A (en) * 1991-08-05 1992-07-21 Farina Alfred J Heat exchanger plug
DE4309598A1 (en) * 1993-03-22 1994-09-29 Bruns Gmbh Geb Boiler

Also Published As

Publication number Publication date
EP0825392A2 (en) 1998-02-25
ATE208027T1 (en) 2001-11-15
DE59705157D1 (en) 2001-12-06
EP0825392A3 (en) 1999-03-24
DE19634200A1 (en) 1998-02-26

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