EP3096093B1 - Heating device - Google Patents

Heating device Download PDF

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Publication number
EP3096093B1
EP3096093B1 EP16168731.4A EP16168731A EP3096093B1 EP 3096093 B1 EP3096093 B1 EP 3096093B1 EP 16168731 A EP16168731 A EP 16168731A EP 3096093 B1 EP3096093 B1 EP 3096093B1
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EP
European Patent Office
Prior art keywords
heat transfer
heating
gas flue
heating gas
heating device
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.)
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EP16168731.4A
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German (de)
French (fr)
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EP3096093A1 (en
Inventor
Norbert Volkmann
Ulas Sahin
Denis Lange
Alexander Guhl
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.)
Viessmann Werke GmbH and Co KG
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Viessmann Werke GmbH and Co KG
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Priority to PL16168731T priority Critical patent/PL3096093T3/en
Publication of EP3096093A1 publication Critical patent/EP3096093A1/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/24Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers
    • F24H1/26Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body
    • F24H1/28Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body including one or more furnace or fire tubes
    • F24H1/287Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body including one or more furnace or fire tubes with the fire tubes arranged in line with the combustion chamber
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00Details
    • F24H9/0005Details for water heaters
    • F24H9/001Guiding means
    • F24H9/0026Guiding means in combustion gas channels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00Tubular elements; Assemblies of tubular elements
    • F28F1/10Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/40Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00Making other particular articles
    • B21D53/02Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/04Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of sheet metal
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0024Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for combustion apparatus, e.g. for boilers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00Fins
    • F28F2215/04Assemblies of fins having different features, e.g. with different fin densities
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00Fins
    • F28F2215/10Secondary fins, e.g. projections or recesses on main fins

Definitions

  • the invention relates to a heater according to the preamble of patent claim 1.
  • a heater of the type mentioned is from the patent document EP 0 632 239 A1 known.
  • This heater consists of a combustion chamber and a trained to conduct hot, generated in the combustion chamber flue gas flue gas, which has an inlet region and an outlet region and is connected to the combustion chamber connected via the inlet region and wherein in the hot gas to heat transfer from the hot exhaust gas to the Schugaszug spaced from each other, a wall thickness having heat transfer ribs are arranged.
  • These heat exchanger fins which may be formed, for example, as an extruded aluminum profile or also from a folded sheet metal, extend unchanged in cross section from the inlet region to the outlet region.
  • the Schugaszug itself is surrounded outside in a known manner by the heater flowing through the heating circuit water.
  • a heater according to the preamble of claim 1 is known from the patent document DE 10 2007 060 508 A1 known.
  • the invention has for its object to improve a heater of the type mentioned.
  • a heater is to be created with a further improved heat transfer in the field of Schushippes from the exhaust gas to the Schunikwaser.
  • the wall thickness of the heat transfer ribs is greater or the heat transfer ribs are thick-walled on the side of the entry region than on the side of the exit region and if a wall of the heating gas duct arranged between the exhaust gas and the water has a wall thickness which smaller than the smallest wall thickness of the heat transfer rib is formed.
  • the solution according to the invention is thus distinguished by the fact that constructional measures are taken on the hot gas flue which take into account a flow of exhaust gas which cools between the inlet and outlet regions.
  • a thicker-walled heat transfer rib is used than at the exit region.
  • the heater shown in the figures consists in a conventional manner of a combustion chamber 1 and a trained to conduct hot, in the combustion chamber 1 with a not-shown burner exhaust gas flue 2, which has an inlet region 2.1 and an outlet region 2.2 and is formed connected to the combustion chamber 1 via the inlet region 2.1 and wherein in the heating gas 2 for heat transfer from the hot exhaust gas to the heating flue 2 spaced apart, a wall thickness having heat transfer ribs 3 are arranged of a metallic material.
  • the combustion chamber 1 is connected to a plurality of (here four) heating gas trains 2 through which the exhaust gas flows.
  • the Schugaszug 2 itself has in this case a (approximately) rectangular cross-sectional area with a length and a width, wherein the length corresponds to a multiple of the width.
  • the heating gas 2 is formed connected via the outlet region 2.2 with an exhaust gas collecting chamber 4.
  • the combustion chamber 1 is arranged above the heating gas train 2 and this above the exhaust gas collecting chamber 4.
  • the exhaust gas collection chamber 4 is in turn in a known manner (and therefore not shown separately) connected to a chimney of a building or the like.
  • FIG. 2 shows the still relatively thick-walled and with comparatively large distance from each other arranged heat transfer ribs 3 in the inlet region 2.1 (section AA).
  • FIG. 3 shows the comparatively thin-walled and with comparatively small distance from each other arranged heat transfer ribs 3 in the outlet region 2.2 (section BB).
  • FIGS. 1 to 3 thus a basic constellation.
  • the decrease in the volume of the exhaust gas with increasing distance from the combustion chamber 1 thus, again expressed in other words, according to the invention provided that a) the wall thickness of the heat transfer fin 3 with increasing distance from the combustion chamber. 1 is formed smaller and / or that b) the distance between the heat transfer ribs 3 is formed smaller with increasing distance from the combustion chamber 1.
  • the named Change from zone to zone can take place continuously or, which is structurally simpler, stepwise.
  • the heating gas 2 flows through the exhaust gas on the one hand and on the other surrounded by water (in particular Schunik) is also provided for a particularly good heat transfer according to the invention, that between The exhaust gas and the water disposed wall of the heating gas 2 has a wall thickness which is smaller than the smallest wall thickness of the heat transfer rib 3 is formed.
  • the wall of the hot gas flue 2 is formed from a metallic sheet material.
  • the heater according to the invention in which also a wall of the hot gas flue 2 and the heat transfer fins 3 are formed as separate components, particularly preferably provided that the heat transfer ribs 3 as support of the wall of the hot gas flue 2 against the pending from the outside water pressure are formed.
  • the heat transfer ribs 3 are preferably in one (see in particular FIG. 2 ) or multi-row (see in particular FIG. 3 ) and multiple S-shape arranged in the hot gas flue 2, wherein the proviso "multiple" simply means that several S-shapes are arranged in a row in the longitudinal direction.
  • the heater according to the invention is to be operated as a so-called condensing boiler to achieve high efficiency, it is also particularly preferred that the Schugaszug 2 and / or the heat transfer fins 3 is formed from a resulting from the exhaust condensate material or are.
  • FIGS. 4 and 5 a further embodiment of the hot gas flue invention is shown.
  • This Thompsongaszug is characterized in that the heat transfer ribs 3 in a - relative to a flow of hot exhaust gas - central region of the Schugaszuges 2 have more distance to the inlet region 2.1 of the Schugaszuges 2 than at an edge region of the Schugaszuges 2. Expressed again in other words, a notch is thus provided in the central region of the heat transfer ribs 3 at the entry region.
  • This proviso has the advantage that the hot, especially in the central region in the Schugaszug inflowing First, the exhaust gas can cool down a little before it comes into contact with the heat transfer rib 3. At the same time, however, somewhat prolonged formation of the heat transfer fins 3 is still provided by the less hot exhaust gas applied edge region for a sufficient support of the wall of the Schugaszuges 2.
  • this heating gas 2 has a total of three different zones.
  • the entry-area heat transfer ribs 3 are shown, which, in order to be able to withstand the hot exhaust gas, are correspondingly thick-walled and arranged at a relatively large distance from one another.
  • the heat transfer ribs 3 in the middle and outlet areas are significantly thinner walls and arranged at a smaller distance from each other.
  • FIG. 4 provided that the heat transfer fins 3 a zone (ie in a region in which the wall thickness and the distance of the heat transfer fins 3 does not change) from two, seen in the flow direction of the hot exhaust gas successively arranged sections 3.1, 3.2 are formed, wherein between the sections 3.1, 3.2 a gap is provided and the sections 3.1, 3.2 are preferably arranged with offset from one another.
  • This proviso serves to swirl the flow in this zone to increase the heat transfer again.

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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)
  • Geometry (AREA)
  • Details Of Fluid Heaters (AREA)
  • Incineration Of Waste (AREA)

Description

Die Erfindung betrifft ein Heizgerät gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a heater according to the preamble of patent claim 1.

Ein Heizgerät der eingangs genannten Art ist aus dem Patentdokument EP 0 632 239 A1 bekannt. Dieses Heizgerät besteht aus einer Brennkammer und einem zur Führung von heißem, in der Brennkammer erzeugtem Abgas ausgebildeten Heizgaszug, wobei dieser einen Eintrittsbereich und einen Austrittsbereich aufweist und mit der Brennkammer über den Eintrittsbereich verbunden ausgebildet ist und wobei im Heizgaszug zur Wärmeübertragung vom heißen Abgas auf den Heizgaszug zueinander beabstandete, eine Wandstärke aufweisende Wärmeübertragungsrippen angeordnet sind. Diese Wärmetauscherrippen, die zum Beispiel als Aluminiumstrangpressprofil oder auch aus einem gefalteten Blech gebildet sein können, erstrecken sich dabei im Querschnitt unverändert vom Eintrittsbereich bis zum Austrittsbereich. Der Heizgaszug selbst ist außen in bekannter Weise von das Heizgerät durchströmenden Heizkreiswasser umgeben.A heater of the type mentioned is from the patent document EP 0 632 239 A1 known. This heater consists of a combustion chamber and a trained to conduct hot, generated in the combustion chamber flue gas flue gas, which has an inlet region and an outlet region and is connected to the combustion chamber connected via the inlet region and wherein in the hot gas to heat transfer from the hot exhaust gas to the Heizgaszug spaced from each other, a wall thickness having heat transfer ribs are arranged. These heat exchanger fins, which may be formed, for example, as an extruded aluminum profile or also from a folded sheet metal, extend unchanged in cross section from the inlet region to the outlet region. The Heizgaszug itself is surrounded outside in a known manner by the heater flowing through the heating circuit water.

Ein Heizgerät gemäß dem Oberbegriff des Patentanspruchs 1 ist aus dem Patentdokument DE 10 2007 060 508 A1 bekannt.A heater according to the preamble of claim 1 is known from the patent document DE 10 2007 060 508 A1 known.

Der Erfindung liegt die Aufgabe zugrunde, ein Heizgerät der eingangs genannten Art zu verbessern. Insbesondere soll ein Heizgerät mit einer weiter verbesserten Wärmeübertragung im Bereich des Heizgaszuges vom Abgas auf das Heizkreiswaser geschaffen werden.The invention has for its object to improve a heater of the type mentioned. In particular, a heater is to be created with a further improved heat transfer in the field of Heizgaszuges from the exhaust gas to the Heizkreiswaser.

Diese Aufgabe ist mit einem Heizgerät der eingangs genannten Art durch die im Kennzeichen des Patentanspruchs 1 aufgeführten Merkmale gelöst.This object is achieved with a heater of the type mentioned by the features listed in the characterizing part of claim 1.

Nach der Erfindung ist also vorgesehen, dass auf Seiten des Eintrittsbereichs die Wandstärke der Wärmeübertragungsrippen größer bzw. die Wärmeübertragungsrippen dickwandiger als auf Seiten des Austrittsbereichs ausgebildet ist bzw. sind und dass eine zwischen dem Abgas und dem Wasser angeordnete Wandung des Heizgaszuges eine Wandstärke aufweist, die kleiner als die kleinste Wandstärke der Wärmeübertragungsrippe ausgebildet ist.According to the invention, it is thus provided that the wall thickness of the heat transfer ribs is greater or the heat transfer ribs are thick-walled on the side of the entry region than on the side of the exit region and if a wall of the heating gas duct arranged between the exhaust gas and the water has a wall thickness which smaller than the smallest wall thickness of the heat transfer rib is formed.

Mit anderen Worten zeichnet sich die erfindungsgemäße Lösung somit dadurch aus, dass am Heizgaszug bauliche Maßnahmen ergriffen werden, die einer sich zwischen dem Eintritts- und Austrittsbereich abkühlenden Abgasströmung Rechnung tragen. Auf Seiten des Eintrittsbereichs, also dort wo die Temperatur des Abgases noch vergleichsweise hoch ist, wird dabei eine dickwandigere Wärmeübertragungsrippe als am Austrittsbereich eingesetzt. Diese Maßnahme führt, was unten noch genauer erläutert wird, zu einem an die jeweilige Temperatur des sich im Heizgaszugverlauf abkühlenden Abgases optimal angepassten Heizgaszug.In other words, the solution according to the invention is thus distinguished by the fact that constructional measures are taken on the hot gas flue which take into account a flow of exhaust gas which cools between the inlet and outlet regions. On the side of the inlet region, ie where the temperature of the exhaust gas is still comparatively high, a thicker-walled heat transfer rib is used than at the exit region. This measure, which will be explained in more detail below, leads to a heating gas train optimally adapted to the respective temperature of the exhaust gas cooling down in the course of the heating gas flow.

Die bezüglich der Variation der Wandstärke auf der Hand liegende alternative Lösung, nämlich einfach seitens des Eintrittsbereichs ein temperaturbeständigeres Material als am Austrittsbereich vorzusehen, ist dabei für die Lösung der gestellten Aufgabe insofern nicht zielführend, als die Verarbeitung unterschiedlicher Materialien im Verlauf des Heizgaszuges aufwändig und absehbar mit Problemen wegen unterschiedlicher Wärmeausdehnungen der unterschiedlichen Materialien verbunden wäre.With respect to the variation of the wall thickness obvious alternative solution, namely simply provide a more temperature-resistant material than the exit area from the inlet area, is not effective for the solution of the problem insofar as the processing of different materials in the course of Heizgaszuges consuming and foreseeable with problems because of different Thermal expansions of different materials would be connected.

Andere vorteilhafte Weiterbildungen ergeben sich aus den abhängigen Patentansprüchen.Other advantageous developments emerge from the dependent claims.

Das erfindungsgemäße Heizgerät einschließlich seiner vorteilhaften Weiterbildungen gemäß der abhängigen Patentansprüche wird nachfolgend anhand der zeichnerischen Darstellung verschiedener Ausführungsbeispiele näher erläutert.The heater according to the invention including its advantageous developments according to the dependent claims will be explained in more detail with reference to the drawings of various embodiments.

Es zeigt

Figur 1
schematisch das erfindungsgemäße Heizgerät mit einer Brennkammer, mit vier von Heizkreiswasser umschlossenenen Heizgaszügen und mit einer Abgassammelkammer;
Figur 2
schematisch im Schnitt die vier Heizgaszüge gemäß Figur 1 auf Höhe des Eintrittsbereiches (Schnitt A-A);
Figur 3
schematisch im Schnitt die vier Heizgaszüge gemäß Figur 1 auf Höhe des Austrittsbereiches (Schnitt B-B);
Figur 4
perspektivisch einen zum besseren Verständnis halb geöffneten Heizgaszug mit insgesamt drei Zonen;
Figur 5
eine Ausschnittsvergrößerung zum Ausführungsbeispiel gemäß Figur 4; und
Figur 6
ebenfalls vergrößert (und auch halb geöffnet) eine weitere Ausführungsform mit Stegen zwischen den eintrittsbereichsseitigen Wärmeübertragungsrippen.
It shows
FIG. 1
schematically the heater according to the invention with a combustion chamber, with four surrounded by Heizkreiswasser Heizgaszügen and with an exhaust gas collection chamber;
FIG. 2
schematically in section the four flues according to FIG. 1 at the level of the entrance area (section AA);
FIG. 3
schematically in section the four flues according to FIG. 1 at the level of the exit area (section BB);
FIG. 4
in perspective, for a better understanding half open Heizgaszug with a total of three zones;
FIG. 5
an enlarged detail of the embodiment according to FIG. 4 ; and
FIG. 6
also enlarged (and also half open) another embodiment with webs between the inlet region heat transfer ribs.

Das in den Figuren dargestellte Heizgerät besteht in an sich bekannter Weise aus einer Brennkammer 1 und einem zur Führung von heißem, in der Brennkammer 1 mit einem nicht extra dargestellten Brenner erzeugtem Abgas ausgebildeten Heizgaszug 2, wobei dieser einen Eintrittsbereich 2.1 und einen Austrittsbereich 2.2 aufweist und mit der Brennkammer 1 über den Eintrittsbereich 2.1 verbunden ausgebildet ist und wobei im Heizgaszug 2 zur Wärmeübertragung vom heißen Abgas auf den Heizgaszug 2 zueinander beabstandete, eine Wandstärke aufweisende Wärmeübertragungsrippen 3 aus einem metallischen Material angeordnet sind.The heater shown in the figures consists in a conventional manner of a combustion chamber 1 and a trained to conduct hot, in the combustion chamber 1 with a not-shown burner exhaust gas flue 2, which has an inlet region 2.1 and an outlet region 2.2 and is formed connected to the combustion chamber 1 via the inlet region 2.1 and wherein in the heating gas 2 for heat transfer from the hot exhaust gas to the heating flue 2 spaced apart, a wall thickness having heat transfer ribs 3 are arranged of a metallic material.

Wie beim eingangs genannten Stand der Technik ist auch beim erfindungsgemäßen Heizgerät, um eine ausreichende Abgasmenge aus der Brennkammer 1 abführen zu können, vorgesehen, dass die Brennkammer 1 mit mehreren (hier vier), parallel vom Abgas durchströmten Heizgaszügen 2 verbunden ausgebildet ist. Der Heizgaszug 2 selbst weist dabei eine (etwa) rechteckige Querschnittsfläche mit einer Länge und mit einer Breite auf, wobei die Länge einem Vielfachen der Breite entspricht.As in the prior art mentioned above, in the heater according to the invention, in order to be able to dissipate a sufficient amount of exhaust gas from the combustion chamber 1, it is provided that the combustion chamber 1 is connected to a plurality of (here four) heating gas trains 2 through which the exhaust gas flows. The Heizgaszug 2 itself has in this case a (approximately) rectangular cross-sectional area with a length and a width, wherein the length corresponds to a multiple of the width.

Außerdem ist in an sich bekannter Weise vorgesehen, dass der Heizgaszug 2 über den Austrittsbereich 2.2 mit einer Abgassammelkammer 4 verbunden ausgebildet ist. Dabei ist weiterhin die Brennkammer 1 oberhalb des Heizgaszuges 2 und dieser oberhalb der Abgassammelkammer 4 angeordnet. Die Abgassammelkammer 4 ist ihrerseits in bekannter Weise (und daher nicht extra dargestellt) mit einem Kamin eines Gebäudes oder dergleichen verbunden.In addition, it is provided in a conventional manner that the heating gas 2 is formed connected via the outlet region 2.2 with an exhaust gas collecting chamber 4. In this case, furthermore, the combustion chamber 1 is arranged above the heating gas train 2 and this above the exhaust gas collecting chamber 4. The exhaust gas collection chamber 4 is in turn in a known manner (and therefore not shown separately) connected to a chimney of a building or the like.

Wesentlich für das erfindungsgemäße Heizgerät ist nun, dass auf Seiten des Eintrittsbereichs 2.1 die Wandstärke der Wärmeübertragungsrippen 3 größer bzw. die Wärmeübertragungsrippen 3 dickwandiger als auf Seiten des Austrittsbereichs 2.2 ausgebildet ist bzw. sind.Essential for the heater according to the invention is now that on the side of the inlet region 2.1, the wall thickness of the heat transfer ribs 3 larger or the heat transfer fins 3 is thick-walled than on the side of the outlet region 2.2 is or are.

Wie eingangs erläutert, führen diese Maßgaben zu einem Heizgerät, bei dem einerseits die Wärmeübertragungsrippen 3 im Eintrittsbereich 2.1 den noch hohen Temperaturen des Abgases gut standhalten können und bei dem andererseits mit Hilfe von dünnwandigen Wärmeübertragungsrippen 3 im Austrittsbereich 2.2 für eine besonders gute Wärmeübertragung gesorgt ist.As explained above, these provisos lead to a heater in which on the one hand the heat transfer ribs 3 in the inlet region 2.1 can withstand the still high temperatures of the exhaust gas well and on the other hand provided with the help of thin-walled heat transfer fins 3 in the outlet region 2.2 for a particularly good heat transfer.

In den Figuren ist dabei ein Heizgaszug 2 mit zwei verschiedenen Zonen dargestellt. Figur 2 zeigt die noch vergleichsweise dickwandigen und mit vergleichweise großer Distanz zueinander angeordneten Wärmeübertragungsrippen 3 im Eintrittsbereich 2.1 (Schnitt A-A). Figur 3 zeigt dagegen die vergleichsweise dünnwandigen und mit vergleichsweise kleiner Distanz zueinander angeordneten Wärmeübertragungsrippen 3 im Austrittsbereich 2.2 (Schnitt B-B).In the figures, a heating gas 2 is shown with two different zones. FIG. 2 shows the still relatively thick-walled and with comparatively large distance from each other arranged heat transfer ribs 3 in the inlet region 2.1 (section AA). FIG. 3 on the other hand shows the comparatively thin-walled and with comparatively small distance from each other arranged heat transfer ribs 3 in the outlet region 2.2 (section BB).

Wie ohne weiteres verständlich zeigen die Figuren 1 bis 3 somit eine Grundkonstellation. Zu Umsetzung der erfindungsgemäßen Lösung können aber auch Heizgaszüge 2 mit mehr als zwei Zonen vorgesehen sein. Um einerseits den Temperaturbelastungen und andererseits der Abnahme des Volumens des Abgases mit zunehmender Distanz von der Brennkammer 1 gerecht zu werden, ist somit, nochmals in anderen Worten ausgedrückt, erfindungsgemäß vorgesehen, dass a) die Wandstärke der Wärmeübertragungsrippe 3 mit zunehmendem Abstand von der Brennkammer 1 kleiner werdend ausgebildet ist und/oder dass b) der Abstand zwischen den Wärmeübertragungsrippen 3 mit zunehmendem Abstand von der Brennkammer 1 kleiner werdend ausgebildet ist. Die genannte Veränderung von Zone zu Zone kann dabei kontinuierlich oder auch, was konstruktiv einfacher ist, stufenweise erfolgen.As readily understandable show the FIGS. 1 to 3 thus a basic constellation. However, to implement the solution according to the invention, it is also possible to provide heating gas trains 2 with more than two zones. On the one hand to meet the temperature loads and the other hand, the decrease in the volume of the exhaust gas with increasing distance from the combustion chamber 1, thus, again expressed in other words, according to the invention provided that a) the wall thickness of the heat transfer fin 3 with increasing distance from the combustion chamber. 1 is formed smaller and / or that b) the distance between the heat transfer ribs 3 is formed smaller with increasing distance from the combustion chamber 1. The named Change from zone to zone can take place continuously or, which is structurally simpler, stepwise.

Wie der Vergleich der Figuren 2 und 3 zeigt, ist weiterhin besonders bevorzugt vorgesehen, dass eine senkrecht zur Hauptströmungsrichtung des Abgases im Heizgaszug 2 orientierte Durchlassfläche 2.3 für das Abgas im Eintrittsbereich 2.1 größer als im Austrittsbereich 2.2 ausgebildet ist.How the comparison of FIGS. 2 and 3 shows, is furthermore particularly preferably provided that a perpendicular to the main flow direction of the exhaust gas in the hot gas flue 2 oriented passage area 2.3 for the exhaust gas in the inlet region 2.1 is greater than in the outlet region 2.2 is formed.

Bezüglich der Dimensionierung der Bauteile des erfindungsgemäßen Heizgerätes, bei dem außerdem, wie oben bereits erwähnt, der Heizgaszug 2 einerseits vom Abgas durchströmt und andererseits von Wasser (insbesondere Heizkreiswasser) umgeben ausgebildet ist, ist ferner für eine besonders gute Wärmeübertragung erfindungsgemäß vorgesehen, dass eine zwischen dem Abgas und dem Wasser angeordnete Wandung des Heizgaszuges 2 eine Wandstärke aufweist, die kleiner als die kleinste Wandstärke der Wärmeübertragungsrippe 3 ausgebildet ist. Hierzu ist weiterhin bevorzugt vorgesehen, dass die Wandung des Heizgaszuges 2 aus einem metallischen Blechmaterial gebildet ist.With regard to the dimensioning of the components of the heater according to the invention, in which also, as already mentioned above, the heating gas 2 flows through the exhaust gas on the one hand and on the other surrounded by water (in particular Heizkreiswasser) is also provided for a particularly good heat transfer according to the invention, that between The exhaust gas and the water disposed wall of the heating gas 2 has a wall thickness which is smaller than the smallest wall thickness of the heat transfer rib 3 is formed. For this purpose, it is further preferably provided that the wall of the hot gas flue 2 is formed from a metallic sheet material.

Noch etwas genauer betrachtet, ist bei dem erfindungsgemäßen Heizgerät, bei dem außerdem eine Wandung des Heizgaszuges 2 und die Wärmeübertragungsrippen 3 als separate Bauteile ausgebildet sind, besonders bevorzugt vorgesehen, dass die Wärmeübertragungsrippen 3 als Abstützung der Wandung des Heizgaszuges 2 gegen den von außen anstehenden Wasserdruck ausgebildet sind.Considered in more detail, in the heater according to the invention, in which also a wall of the hot gas flue 2 and the heat transfer fins 3 are formed as separate components, particularly preferably provided that the heat transfer ribs 3 as support of the wall of the hot gas flue 2 against the pending from the outside water pressure are formed.

Im Unterschied zum vorgenannten Stand der Technik ist darüber hinaus zur weiteren Verbesserung der Wärmeübertragung im Heizgaszug 2 für einen direkten Kontakt des Abgases mit einer Wandung des Heizgaszuges 2 ein von den Wärmeübertragungsrippen 3 freigelassener Wandbereich 2.4 am Heizgaszug 2 vorgesehen. Es gibt somit im Heizgaszug 2 einerseits direkt mit den Wärmeübertragungsrippen 3 in Kontakt stehende und diese abstützende Wandbereiche 2.5 und andererseits entsprechend frei gelassende Wandbereiche 2.4. Dabei sind, wie die Figuren zeigen, die Wärmeübertragungsrippen 3 vorzugsweise in ein- (siehe insbesondere Figur 2) oder mehrreihiger (siehe insbesondere Figur 3) und vielfacher S-Form im Heizgaszug 2 angeordnet, wobei die Maßgabe "vielfach" dabei einfach bedeutet, dass mehrere S-Formen in Längsrichtung aneinander gereiht angeordnet sind.In contrast to the aforementioned prior art is also to further improve the heat transfer in the heating gas 2 for a direct contact of the exhaust gas with a wall of Heizgaszuges 2 one of the heat transfer ribs 3 released wall area 2.4 provided on Heizgaszug 2. There are thus in the heating gas 2 on the one hand directly with the heat transfer ribs 3 in contact and this supporting wall areas 2.5 and on the other hand according to freely leaving wall areas 2.4. In this case, as the figures show, the heat transfer ribs 3 are preferably in one (see in particular FIG. 2 ) or multi-row (see in particular FIG. 3 ) and multiple S-shape arranged in the hot gas flue 2, wherein the proviso "multiple" simply means that several S-shapes are arranged in a row in the longitudinal direction.

Da das erfindungsgemäße Heizgerät zur Erzielung eines hohen Wirkungsgrades als so genanntes Brennwertgerät betrieben werden soll, ist ferner besonders bevorzugt vorgesehen, dass der Heizgaszug 2 und/oder die Wärmeübertragungsrippen 3 aus einem einem aus dem Abgas resultierenden Kondensat widerstehenden Material gebildet ist bzw. sind.Since the heater according to the invention is to be operated as a so-called condensing boiler to achieve high efficiency, it is also particularly preferred that the Heizgaszug 2 and / or the heat transfer fins 3 is formed from a resulting from the exhaust condensate material or are.

In den Figuren 4 und 5 ist ferner ein weiteres Ausführungsbeispiel des erfindungsgemäßen Heizgaszug dargestellt. Dieser Heizgaszug zeichnet sich dadurch aus, dass die Wärmeübertragungsrippen 3 in einem - bezogen auf eine Strömung des heißen Abgases - Zentralbereich des Heizgaszuges 2 mehr Abstand zum Eintrittsbereich 2.1 des Heizgaszuges 2 als an einem Randbereich des Heizgaszuges 2 aufweisen. Nochmals mit anderen Worten ausgedrückt, ist somit am Eintrittsbereich eine Ausklinkung im mittleren Bereich der Wärmeübertragungsrippen 3 vorgesehen.In the FIGS. 4 and 5 Furthermore, a further embodiment of the hot gas flue invention is shown. This Heizgaszug is characterized in that the heat transfer ribs 3 in a - relative to a flow of hot exhaust gas - central region of the Heizgaszuges 2 have more distance to the inlet region 2.1 of the Heizgaszuges 2 than at an edge region of the Heizgaszuges 2. Expressed again in other words, a notch is thus provided in the central region of the heat transfer ribs 3 at the entry region.

Diese Maßgabe bringt den Vorteil mit sich, dass sich das heiße, insbesondere im Zentralbereich in den Heizgaszug einströmende Abgas zunächst etwas abkühlen kann, bevor es mit den Wärmeübertragungsrippe 3 in Kontakt kommt. Gleichzeitig ist aber durch die im weniger mit heißem Abgas beaufschlagten Randbereich etwas verlängerte Ausbildung der Wärmeübertragungsrippen 3 nach wie vor für eine ausreichende Abstützung der Wandung des Heizgaszuges 2 gesorgt.This proviso has the advantage that the hot, especially in the central region in the Heizgaszug inflowing First, the exhaust gas can cool down a little before it comes into contact with the heat transfer rib 3. At the same time, however, somewhat prolonged formation of the heat transfer fins 3 is still provided by the less hot exhaust gas applied edge region for a sufficient support of the wall of the Heizgaszuges 2.

In Figur 4 ist im übrigen gut erkennbar, dass dieser Heizgaszug 2 insgesamt drei verschiedene Zonen aufweist. Im vorderen Bildbereich sind die eintrittsbereichsseitigen Wärmeübertragungsrippen 3 dargestellt, die, um dem heißen Abgas gut widerstehen zu können, entsprechend dickwandig ausgebildet und mit vergleichsweise großem Abstand zueinander angeordnet sind. Die Wärmeübertragungsrippen 3 im mittleren und austrittsseitigen Bereich sind deutlich dünnwandiger und mit geringerem Abstand zueinander angeordnet.In FIG. 4 is otherwise clearly visible that this heating gas 2 has a total of three different zones. In the front image area, the entry-area heat transfer ribs 3 are shown, which, in order to be able to withstand the hot exhaust gas, are correspondingly thick-walled and arranged at a relatively large distance from one another. The heat transfer ribs 3 in the middle and outlet areas are significantly thinner walls and arranged at a smaller distance from each other.

Außerdem ist beim Ausführungsbeispiel gemäß Figur 4 vorgesehen, dass die Wärmeübertragungsrippen 3 einer Zone (also in einem Bereich, in dem sich die Wandstärke und der Abstand der Wärmeübertragungsrippen 3 nicht ändert) aus zwei, in Strömungsrichtung des heißen Abgases gesehen hintereinander angeordneten Abschnitten 3.1, 3.2 gebildet sind, wobei zwischen den Abschnitten 3.1, 3.2 ein Spalt vorgesehen ist und die Abschnitte 3.1, 3.2 vorzugsweise mit Versatz zueinander angeordnet sind. Diese Maßgabe dient dazu, die Strömung in dieser Zone zu verwirbeln, um die Wärmeübertragung nochmals zu steigern.In addition, according to the embodiment FIG. 4 provided that the heat transfer fins 3 a zone (ie in a region in which the wall thickness and the distance of the heat transfer fins 3 does not change) from two, seen in the flow direction of the hot exhaust gas successively arranged sections 3.1, 3.2 are formed, wherein between the sections 3.1, 3.2 a gap is provided and the sections 3.1, 3.2 are preferably arranged with offset from one another. This proviso serves to swirl the flow in this zone to increase the heat transfer again.

Mit Verweis auf Figur 6 ist schließlich bevorzugt vorgesehen, dass zwischen den Wärmeübertragungsrippe 3, und zwar insbesondere in einem - bezogen auf eine Strömung des heißen Abgases - Zentralbereich des Heizgaszuges 2, Stege 3.3 vorgesehen sind. Auch diese Maßgabe dient nochmals zur Verbesserung der Wärmeübertragung.With reference to FIG. 6 Finally, it is preferably provided that between the heat transfer rib 3, and in particular in a - based on a flow of hot exhaust gas - Central area of Heizgaszuges 2, webs 3.3 are provided. This proviso again serves to improve the heat transfer.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Brennkammercombustion chamber
22
Heizgaszugheating gas
2.12.1
Eintrittsbereichentry area
2.22.2
Austrittsbereichexit area
2.32.3
DurchlassflächePassage area
2.42.4
Wandbereichwall area
2.52.5
Wandbereichwall area
33
WärmeübertragungsrippeHeat transfer fin
3.13.1
Abschnittsection
3.23.2
Abschnittsection
3.33.3
Stegweb
44
AbgassammelkammerExhaust gas collection chamber

Claims (9)

  1. Heating device comprising a combustion chamber (1) and a heating gas flue (2) formed to guide hot waste gas generated in the combustion chamber (1), wherein said heating gas flue has an inlet region (2.1) and an outlet region (2.2) and is configured to be connected to the combustion chamber (1) via the inlet region (2.1), and wherein heat transfer fins (3) which are spaced apart from one another and have a wall thickness, are arranged in the heating gas flue (2) for heat transfer from the hot waste gas to the heating gas flue (2), wherein the heating gas flue (2) on the one hand has waste gas flowing through it and on the other hand is configured to be surrounded by water,
    characterized in that
    on the side of the inlet region (2.1) the wall thickness of the heat transfer fins (3) is greater or the heat transfer fins (3) are configured to be thicker-walled than on the side of the outlet region (2.2) and that a wall of the heating gas flue (2) arranged between the waste gas and the water has a wall thickness which is configured to be smaller than the smallest wall thickness of the heat transfer fin (3).
  2. The heating device according to claim 1,
    characterized in that
    a passage area (2.3) for the waste gas in the inlet region (2.1), which is oriented perpendicular to the principal direction of flow of the waste gas in the heating gas flue (2) is configured to be larger than in the outlet region (2.2).
  3. The heating device according to claim 1 or 2,
    characterized in that
    the wall thickness of the heat transfer fin (3) is configured to become smaller with increasing distance from the combustion chamber (1).
  4. The heating device according to one of claims 1 to 3,
    characterized in that
    the spacing between the heat transfer fins (3) is configured to become smaller with increasing distance from the combustion chamber (1).
  5. The heating device according to one of claims 1 to 4, wherein a wall of the heating gas flue (2) and the heat transfer fins (3) are configured as separate components,
    characterized in that
    the heat transfer fins (3) are configured as support media for pressure stabilization of the wall of the heating gas flue (2).
  6. The heating device according to one of claims 1 to 5,
    characterized in that
    in the heating gas flue (2) a wall region (2.4) left free from the heat transfer fins (3) is provided on the heating gas flue (2) for contact of the waste gas with a wall of the heating gas flue (2).
  7. The heating device according to one of claims 1 to 6,
    characterized in that
    the heating gas flue (2) and/or the heat transfer fins (3) is or are formed from a material which resists condensate resulting from the waste gas.
  8. The heating device according to one of claims 1 to 7,
    characterized in that
    the heat transfer fins (3) are arranged in a single- or multi-row and multiple S shape in the heating gas flue (2).
  9. The heating device according to one of claims 1 to 8,
    characterized in that
    the heating gas flue (2) has a rectangular cross-sectional area having a length and having a width, wherein the length preferably corresponds to a multiple of the width.
EP16168731.4A 2015-05-21 2016-05-09 Heating device Active EP3096093B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL16168731T PL3096093T3 (en) 2015-05-21 2016-05-09 Heating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015108059.1A DE102015108059A1 (en) 2015-05-21 2015-05-21 heater

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EP3096093A1 EP3096093A1 (en) 2016-11-23
EP3096093B1 true EP3096093B1 (en) 2019-08-07

Family

ID=56072213

Family Applications (1)

Application Number Title Priority Date Filing Date
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DE (1) DE102015108059A1 (en)
PL (1) PL3096093T3 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH111633A (en) * 1924-11-18 1925-08-17 Junkers Hugo Heat exchange device.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8323656U1 (en) * 1983-08-17 1983-12-08 Vießmann, Hans, Dr.h.c., 3559 Battenberg HEAT EXCHANGER, ESPECIALLY ADDITIONAL HEATING AREA
DE8601896U1 (en) * 1986-01-25 1986-04-03 Vießmann, Hans, Dr.h.c., 3559 Battenberg Condensate boiler
DE9309771U1 (en) 1993-07-01 1993-08-26 Viessmann Werke Kg Hot gas flue
DE4412714A1 (en) * 1994-04-13 1995-10-19 Buderus Heiztechnik Gmbh Water geyser with catalytic burner unit(s) in water chamber
DE4421671A1 (en) * 1994-06-23 1996-01-04 Broetje August Gmbh & Co Heat exchanger for gas=heated boiler
NL9500392A (en) * 1995-02-28 1996-10-01 Dejatech Bv Heat exchanger with universal combustion chamber and condensate discharge.
DE102007060508A1 (en) * 2007-12-15 2009-06-18 Robert Bosch Gmbh Heat exchanger for a heater
NL2011646C2 (en) * 2013-10-18 2015-04-23 Dejatech Ges B V Heat exchanger, set and method for forming the same.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH111633A (en) * 1924-11-18 1925-08-17 Junkers Hugo Heat exchange device.

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DE102015108059A1 (en) 2016-11-24
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