EP0021281B1 - Chimney terminal for balanced flue - Google Patents

Chimney terminal for balanced flue Download PDF

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Publication number
EP0021281B1
EP0021281B1 EP80103309A EP80103309A EP0021281B1 EP 0021281 B1 EP0021281 B1 EP 0021281B1 EP 80103309 A EP80103309 A EP 80103309A EP 80103309 A EP80103309 A EP 80103309A EP 0021281 B1 EP0021281 B1 EP 0021281B1
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EP
European Patent Office
Prior art keywords
flue
air
section
air duct
cross
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Expired
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EP80103309A
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German (de)
French (fr)
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EP0021281A1 (en
Inventor
Hans Dipl.-Ing. Sommers
Friedel Hackler
Otto Ing. Grad. Menzel
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EON Ruhrgas AG
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Ruhrgas AG
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Priority to AT80103309T priority Critical patent/ATE2697T1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/02—Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/04—Balanced-flue arrangements, i.e. devices which combine air inlet to combustion unit with smoke outlet

Definitions

  • the invention relates to a chimney head for air exhaust chimneys.
  • combustion air is required to operate fireplaces, which is taken from the space surrounding the fireplace. Since, for reasons of energy saving, new-sealed windows are required for new buildings, the air exchange in the room surrounding the fireplace is reduced. In extreme cases, this can lead to a reduction in the quality of combustion or to incomplete combustion with the associated known disadvantages or dangers.
  • measures include, for example, the so-called air-exhaust chimneys. These chimneys supply combustion air to the fireplaces from outside the house and at the same time discharge the exhaust gases via the roof to the outside.
  • GB-A-677 526 describes a chimney head for an air-flue gas chimney which supplies pure air to a connected gas burner and removes the exhaust gases.
  • the inner cross section of the exhaust duct at the upper end in the flow direction of the exhaust gases is designed to expand in a diffuser-like manner and has a sharp-edged upper end edge.
  • the influences have a direct impact on the operation of the fireplaces in such a way that the air figures during combustion and the exhaust gas temperatures change in an undesirable manner. This can lead to unstable operation or to a deteriorated efficiency of the connected fireplaces; in extreme cases, the operation of the fireplaces can even become impossible.
  • the object of the invention is to reduce the effects of the weather conditions prevailing outdoors, in particular by wind, on the fireplaces in the case of air-exhaust chimneys.
  • the pressure difference between the combustion air inlet and exhaust gas outlet of the individual fireplaces should be as small as possible.
  • this pressure difference should be as equal as possible at all fireplaces regardless of the floor on which they are installed.
  • the head of the exhaust duct 2 is designed such that the internal cross section widens in the direction of flow of the exhaust gases in a diffuser-like manner. It has proven to be advantageous to give the diffuser-like extension 3 an angle of inclination with respect to the vertical of up to 10 °, preferably up to 5 °.
  • a rounded cross-sectional constriction 4 is located below the diffuser-like extension 3, from which the cross-section widens like a diffuser, as described above.
  • the diffuser-like extension 3 Through the diffuser-like extension 3, the exhaust gases are guided in such a way that the flow velocity and thus the kinetic energy of the exhaust gases are reduced and converted into pressure energy with almost no loss. This makes it possible to lower the pressure level in the upper part of the exhaust duct and to adjust it to the same level in the air duct.
  • a wind flow directed against the exhaust gas outflow is hindered by the diffuser-like extension 3.
  • the end edge 5 of the exhaust duct 2 is designed with sharp edges. Experiments have shown that wind directed at the chimney head has a less adverse effect on the pressure conditions in the chimney than in the case of a design with a blunt or rounded edge. The wind flow is split at the sharp edge of the exhaust shaft head and, unlike with a blunt edge, does not get into the chimney together with neighboring air flows.
  • a further reduction in the influence of wind is achieved by the rounded cross-sectional constriction 4 in the exhaust duct shown in FIG. 2, followed by a diffuser-like expansion 3.
  • the outflow of the exhaust gases is not hindered by this device, while the inflow of wind - as a result of a flow separation due to the abrupt cross-section widening - is considerably hindered.
  • the end edge 5 is sharp-edged for the reasons mentioned above.
  • the upper end edge 6 of the air shaft 1 is rounded from the outside inwards. As a result, it brings a higher and cheaper pressure level in the upper part of the air supply shaft than a blunt end edge.
  • the air passage cross-section is smaller than the shaft cross-section in the area of the rounding and gradually widens from there to the full shaft cross-section. It has proven to be advantageous to give this diffuser-like extension 7 an angle of inclination with respect to the vertical of up to 10 °, preferably up to 5'C.
  • the above-mentioned measures result in an almost loss-free guidance of the air flow - without impact and acceleration losses at the entry into the air shaft.
  • a backflow of air generated by wind suction at the air shaft inlet or a gust of wind that propagates backwards from the chimney to the air shaft inlet is largely prevented by the reduced cross section of the air shaft inlet and by the rounded cross-sectional constriction with subsequent diffuser-like expansion 3 of the exhaust gas shaft or chimney head.
  • the air supply opening is arranged at least 10 cm below the flue gas outlet.
  • the chimney head according to the invention can, depending on the design of the chimney, be made as an attachment and, if necessary, be retrofitted onto the chimney or can be made as part of the chimney during construction.
  • the design of the chimney head according to the invention has the result that the pressure differences between air inlet and exhaust gas outlet at the individual fireplaces are very small and fluctuate little even in strong winds.
  • pressure equalization openings between the air and the flue gas chute near the flue gas nozzles or concentrically to the flue gas flanges of the fireplaces proved to be expedient.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)
  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
  • Chimneys And Flues (AREA)
  • Ventilation (AREA)

Abstract

1. A flue terminal for room-sealed flue systems for taking clean combustion air to and venting products of combustion from all room-sealed appliances connected to any such room-sealed flue systems, characterized in that the cross section of the flue (2) at the top widens into a diffuser (3) and ends with a sharp upper edge (5), and further characterized in that the upper edge (6) of the air duct (1) is rounded from the outer edge towards said air duct and the cross section of said air duct is smaller in the rounded inlet edge area (6) than the cross section of the air duct proper and widens in a divergent section (7) to reach said cross section of the air duct proper.

Description

Die Erfindung betrifft einen Kaminkopf für Luft-Abgas-Kamine.The invention relates to a chimney head for air exhaust chimneys.

Bekanntlich wird zum Betrieb von Feuerstätten Verbrennungsluft benötigt, die dem die Feuerstätte umgebenden Raum entnommen wird. Da aus Gründen der Energieeinsparung bei Neubauten fugendichte Fenster verlangt werden, verringert sich der Luftwechsel des die Feuerstätte umgebenden Raumes. Dies kann in Extremfällen zu einer Verminderung der Verbrennungsgüte beziehungsweise zu unvollständiger Verbrennung mit den damit verbundenen bekannten Nachteilen oder Gefahren führen. Um diese zu vermeiden, sind schon Maßnahmen vorgeschlagen worden, die dazu dienen sollen, den Feuerstellen die benötigte Verbrennungsluft auf andere Weise als aus dem umgebenden Raum zuzuführen. Zu diesen Maßnahmen gehören zum Beispiel die sogenannten Luft-Abgas-Schornsteine. Diese Schornsteine führen den Feuerstätten Verbrennungsluft von außerhalb des Hauses zu und leiten gleichzeitig die Abgase über Dach ins Freie ab.As is known, combustion air is required to operate fireplaces, which is taken from the space surrounding the fireplace. Since, for reasons of energy saving, new-sealed windows are required for new buildings, the air exchange in the room surrounding the fireplace is reduced. In extreme cases, this can lead to a reduction in the quality of combustion or to incomplete combustion with the associated known disadvantages or dangers. In order to avoid this, measures have already been proposed which are intended to supply the combustion air with the required combustion air in a manner other than from the surrounding space. These measures include, for example, the so-called air-exhaust chimneys. These chimneys supply combustion air to the fireplaces from outside the house and at the same time discharge the exhaust gases via the roof to the outside.

Die GB-A-677 526 beschreibt einen Kaminkopf für einen Luft-Abgas-Kamin, der einer angeschlossenen Gasfeuerung reine Luft zuführt und die Abgase abführt. Der Innenquerschnitt des Abgasschachtes am oberen Ende in Strömungsrichtung der Abgase ist diffusorartig erweitend ausgebildet und weist eine scharfkantige obere Abschlußkante auf.GB-A-677 526 describes a chimney head for an air-flue gas chimney which supplies pure air to a connected gas burner and removes the exhaust gases. The inner cross section of the exhaust duct at the upper end in the flow direction of the exhaust gases is designed to expand in a diffuser-like manner and has a sharp-edged upper end edge.

Es sind auch verschiedene Bauweisen von Luft-Abgas-Schornsteinen bekannt, die zum Anschluß mehrerer Gasfeuerstätten dienen sollen:

  • a) Bei der einschenkligen Bauweise, die im Schrifttum teilweise als »Se-duct« bezeichnet wird, (siehe z. B. CH-A-427 117), wird die Verbrennungstuft an der tiefsten Stelle des Kamins über einen waagerechten Kanal zugeführt und das Abgas-Luftgemisch über einen Schornstein, der mit dem Kanal verbunden ist, abgeführt. Die angeschlossenen Feuerstätten entnehmen dem Schornstein ihre Verbrennungsluft und führen ihre Abgase in den gleichen Schornstein zurück. Auf diese Art und Weise erhält nur die unterste Feuerstätte reine Verbrennungsluft und die darüber angeordneten Luft, die mehr oder weniger mit Abgas verdünnt ist.
  • b) Bei der doppelschenkligen Bauweise, die im Schrifttum häufig als »U-duct« bezeichnet wird, wird die Verbrennungsluft über einen senkrechten Schacht, der vom Dach des Gebäudes ausgeht, zugeführt und ebenfalls ein Abgas-Luft-Gemisch über einen Schornstein, der unten mit dem Luftschacht verbunden ist, abgeführt. Wie beim »Se-duct« entnehmen die Feuerstätten dem Schornstein ihre Verbrennungsluft, die mehr oder weniger mit Abgas verdünnt ist, und führen ihre Abgase in den gleichen Schornstein zurück.
  • c) Aus dem DE-U-7 706 857 ist ein Luft-Abgas-Schornstein bekannt, bei dem der Abgas- schacht konzentrisch im Luftschacht angeordnet ist. Auch bei diesem Luft-Abgas-Schornstein sind Luft- und Abgas-Schacht unten miteinander verbunden. Hier handelt es sich aber um ein System, bei dem die Feuerstätten ihre Verbrennungsluft nur dem Luftschacht entnehmen und ihre Abgase dem Abgasschacht zuführen. Es ist auch möglich, Abgasschacht und Luftschacht nebeneinander anzuordnen. Auch hierbei sind der Luft- und der Abgasschacht unten miteinander verbunden. Alle Feuerstätten werden mit reiner Verbrennungsluft versorgt, sind aber den unterschiedlichen Drücken im Luft- und im Abgasschacht ausgesetzt.
Various designs of air-exhaust chimneys are also known, which are intended to be used to connect several gas fireplaces:
  • a) In the one-leg construction, which is sometimes referred to in the literature as "duct" (see, for example, CH-A-427 117), the combustion stage at the lowest point of the chimney is supplied via a horizontal channel and that Exhaust-air mixture discharged through a chimney connected to the duct. The connected fireplaces take their combustion air from the chimney and return their exhaust gases to the same chimney. In this way, only the lowest fireplace receives clean combustion air and the air above it, which is more or less diluted with exhaust gas.
  • b) With the double-leg design, which is often referred to in the literature as "U-duct", the combustion air is fed in via a vertical shaft that starts from the roof of the building, and also an exhaust gas-air mixture via a chimney, the one below connected to the duct. As with the "Se-duct", the fireplaces take their combustion air from the chimney, which is more or less diluted with exhaust gas, and return their exhaust gases to the same chimney.
  • c) From DE-U-7 706 857 an air-exhaust chimney is known in which the exhaust duct is arranged concentrically in the duct. In this air-flue chimney, the air and flue chimneys are also connected at the bottom. However, this is a system in which the fireplaces only extract their combustion air from the air duct and feed their exhaust gases to the exhaust duct. It is also possible to arrange the exhaust duct and air duct side by side. Here, too, the air duct and the exhaust duct are connected to one another at the bottom. All fireplaces are supplied with pure combustion air, but are exposed to the different pressures in the air and exhaust flue.

Messungen an Luft-Abgas-Schornsteinen der letztgenannten Art haben ergeben, daß sowohl mit als auch ohne bekannten Kaminaufsätzen oder -abdeckungen bereits ohne Windeinfluß erheblich unterschiedliche Druckdifferenzen zwischen Lufteintritt und Abgasaustritt an den einzelnen Geräten bestehen, die mit steigender Schachthöhe abnehmen und davon abhängen, welche bzw. wie viele Geräte gerade in Betrieb sind. An den obersten Geräten traten unter Umständen sogar negative Druckdifferenzen auf, die einen Betrieb der Geräte unmöglich machten. Bei Wind kommt ein weiterer Einfluß auf den Betrieb der Gasfeuerstätten hinzu. Je nach Windgeschwindigkeit entstehen mehr oder weniger große Druckschwankungen zwischen Luft- und Abgasschacht, die am obersten Ende des Schachtes am stärksten sind. Außerdem verschieben sich je nach Windrichtung und -geschwindigkeit die mittleren Druckdifferenzen an den einzelnen Feuerstätten in den verschiedenen Höhen. Die Einflüsse wirken sich unmittelbar auf den Betrieb der Feuerstätten aus, derart, daß die Luftzahlen bei der Verbrennung und die Abgastemperaturen sich in unerwünschter Weise ändern. Dies kann zu einer labilen Betriebsweise oder zu einem verschlechterten Wirkungsgrad der angeschlossenen Feuerstätten führen; in Extremfällen kann der Betrieb der Feuerstätten sogar unmöglich werden.Measurements on air-flue gas chimneys of the latter type have shown that both with and without known chimney tops or covers, even without the influence of wind, there are considerably different pressure differences between the air inlet and the flue gas outlet on the individual devices, which decrease with increasing shaft height and depend on which or how many devices are currently in operation. The top devices may even have negative pressure differences that make it impossible to operate the devices. In the event of wind, there is a further influence on the operation of the gas fireplaces. Depending on the wind speed, there are more or less large pressure fluctuations between the air and exhaust gas ducts, which are strongest at the top end of the duct. In addition, depending on the wind direction and speed, the average pressure differences at the individual fireplaces at different heights. The influences have a direct impact on the operation of the fireplaces in such a way that the air figures during combustion and the exhaust gas temperatures change in an undesirable manner. This can lead to unstable operation or to a deteriorated efficiency of the connected fireplaces; in extreme cases, the operation of the fireplaces can even become impossible.

Die Aufgabe der Erfindung besteht darin, bei Luft-Abgas-Schornsteinen Einflüsse von den im Freien herrschenden Wetterbedingungen, insbesondere durch Wind, auf die Feuerstätten zu vermindern. Die Druckdifferenz zwischen Verbrennungslufteintritt und Abgasaustritt der einzelnen Feuerstätten soll möglichst gering werden. Außerdem soll diese Druckdifferenz an allen Feuerstätten unabhängig davon, in welchem Stockwerk sie angebracht sind, möglichst gleich sein.The object of the invention is to reduce the effects of the weather conditions prevailing outdoors, in particular by wind, on the fireplaces in the case of air-exhaust chimneys. The pressure difference between the combustion air inlet and exhaust gas outlet of the individual fireplaces should be as small as possible. In addition, this pressure difference should be as equal as possible at all fireplaces regardless of the floor on which they are installed.

Die Aufgabe wird erfindungsgemäß gelöst durch die in den Ansprüchen 1 bis 4 genannten Maßnahmen.The object is achieved according to the invention by the measures mentioned in claims 1 to 4.

Nachstehend wird anhand der Fig. 1 und 2, die beispielsweise Ausführungsformen zeigen, die Ausbildung und die Wirkungsweise des erfindungsgemäßen Kaminkopfes erläutert.

  • Fig. 1 zeigt einen Längsschnitt durch den Kaminkopf eines doppelschenkligen Luft-Abgas-Schornsteines, bei dem die angeschlossenen Feuerstätten ihre Verbrennungsluft dem Luftschacht 1 entnehmen und ihre Abgase in den Abgasschacht 2 abführen.
  • Fig. 2 zeigt einen Längsschnitt durch den Kaminkopf eines Luft-Abgas-Schornsteines, bei dem der Abgasschacht 2 konzentrisch im Luftschacht 1 angeordnet ist und bei dem die Feuerstätten eberifalls ihre Verbrennungsluft dem Luftschacht 1 entnehmen und ihre Abgase in den Abgasschacht 2 abführen.
The design and the mode of operation of the chimney head according to the invention are explained below with reference to FIGS. 1 and 2, which show embodiments, for example.
  • Fig. 1 shows a longitudinal section through the chimney head of a double-leg air-flue chimney, in which the connected fireplaces take their combustion air from the air duct 1 and discharge their exhaust gases into the flue duct 2.
  • Fig. 2 shows a longitudinal section through the chimney head of an air-exhaust chimney, in which the exhaust duct 2 is arranged concentrically in the air duct 1 and in which the fireplaces eberifalls remove their combustion air from the air duct 1 and discharge their exhaust gases into the exhaust duct 2.

Bei den in den Fig. 1 und 2 gezeigten Anwendungsbeispielen des erfindungsgemäßen Kaminkopfes ist der Kopf des Abgasschachtes 2 derart ausgebildet, daß sich der Innenquerschnitt in Strömungsrichtung der Abgase diffusorartig erweitert. Es hat sich als vorteilhaft erwiesen, der diffusorartigen Erweiterung 3 einen Neigungswinkel gegenüber der Senkrechten von bis zu 10°, vorzugsweise bis zu 5° zu geben.In the application examples of the chimney head according to the invention shown in FIGS. 1 and 2, the head of the exhaust duct 2 is designed such that the internal cross section widens in the direction of flow of the exhaust gases in a diffuser-like manner. It has proven to be advantageous to give the diffuser-like extension 3 an angle of inclination with respect to the vertical of up to 10 °, preferably up to 5 °.

Bei der in Fig. dargestellten Ausführungsform befindet sich als weitere vorteilhafte Ausbildung unterhalb der diffusorartigen Erweiterung 3 eine abgerundete Querschnittsverengung 4, von der aus sich der Querschnitt, wie vorstehend beschrieben, diffusorartig erweitert.In the embodiment shown in FIG. 1, as a further advantageous embodiment, a rounded cross-sectional constriction 4 is located below the diffuser-like extension 3, from which the cross-section widens like a diffuser, as described above.

Durch die diffusorartige Erweiterung 3 werden die Abgase so geführt, daß die Strömungsgeschwindigkeit und damit die Bewegungsenergie der Abgase verringert und nahezu verlustfrei in Druckenergie umgewandelt wird. Hierdurch ist es möglich, das Druckniveau im oberen Teil des Abgasschachtes abzusenken und dem im Luftschacht in gleicher Höhe anzugleichen. Eine gegen die Abgasausströmung gerichtete Windströmung wird durch die diffusorartige Erweiterung 3 behindert. Die Abschlußkante 5 des Abgasschachtes 2 ist scharfkantig ausgeführt. Bei Versuchen wurde festgestellt, daß auf den Kaminkopf gerichteter Wind sich in diesem Fall weniger ungünstig auf die Druckverhältnisse im Kamin auswirkt als bei Ausführung mit stumpfer oder abgerundeter Kante. Die Windströmung wird an der scharfen Kante des Abgasschachtkopfes geteilt und gelangt nicht, wie bei einer stumpfen Kante, zusammen mit benachbarten Luftströmungen in den Kamin hinein.Through the diffuser-like extension 3, the exhaust gases are guided in such a way that the flow velocity and thus the kinetic energy of the exhaust gases are reduced and converted into pressure energy with almost no loss. This makes it possible to lower the pressure level in the upper part of the exhaust duct and to adjust it to the same level in the air duct. A wind flow directed against the exhaust gas outflow is hindered by the diffuser-like extension 3. The end edge 5 of the exhaust duct 2 is designed with sharp edges. Experiments have shown that wind directed at the chimney head has a less adverse effect on the pressure conditions in the chimney than in the case of a design with a blunt or rounded edge. The wind flow is split at the sharp edge of the exhaust shaft head and, unlike with a blunt edge, does not get into the chimney together with neighboring air flows.

Eine weitere Verringerung des Windeinflusses wird durch die in Fig. 2 dargestellte abgerundete Querschnittsverengung 4 im Abgasschacht mit anschließender diffusorartiger Erweiterung 3 erreicht. Durch diese Einrichtung wird die Ausströmung der Abgase nicht behindert, während das Einströmen von Wind - infolge einer Strömungsablösung durch die schroffe Querschnittserweit,erung - erheblich behindert wird. Auch bei dieser Ausführungsform ist die Abschlußkante 5 aus den oben genannten Gründen scharfkantig ausgeführt.A further reduction in the influence of wind is achieved by the rounded cross-sectional constriction 4 in the exhaust duct shown in FIG. 2, followed by a diffuser-like expansion 3. The outflow of the exhaust gases is not hindered by this device, while the inflow of wind - as a result of a flow separation due to the abrupt cross-section widening - is considerably hindered. In this embodiment, too, the end edge 5 is sharp-edged for the reasons mentioned above.

Die obere Abschlußkante 6 des Luftschachtes 1 ist von außen nach innen abgerundet. Dadurch bringt sie ein höheres und günstigeres Druckniveau im Oberteil des Luftzuführungsschachtes als eine stumpfe Abschlußkante. Der Luftdurchtrittsquerschnitt ist im Bereich der Abrundung kleiner als der Schachtquerschnitt und erweitert sich von dort aus allmählich auf den vollen Schachtquerschnitt. Es hat sich als vorteilhaft erwiesen, dieser diffusorartigen Erweiterung 7 einen Neigungswinkel gegenüber der Senkrechten von bis zu 10°, vorzugsweise bis zu 5'C, zu geben. Durch die oben genannten Maßnahmen wird eine nahezu verlustlose Führung der Luftströmung - ohne Stoß- und Beschleunigungsverluste am Eintritt in den Luftschacht - erreicht. Eine durch Windsog am Luftschachteintritt erzeugte Luftrückströmung oder ein Windstoß, der sich vom Kamin rückwärts zum Luftschachteintritt fortpflanzt, wird durch den verringerten Querschnitt des Luftschachteintrittes und durch die abgerundete Querschnittsverengung mit anschließender diffusorartiger Erweiterung 3 des Abgasschachtes bzw. -kaminkopfes weitgehend verhindert.The upper end edge 6 of the air shaft 1 is rounded from the outside inwards. As a result, it brings a higher and cheaper pressure level in the upper part of the air supply shaft than a blunt end edge. The air passage cross-section is smaller than the shaft cross-section in the area of the rounding and gradually widens from there to the full shaft cross-section. It has proven to be advantageous to give this diffuser-like extension 7 an angle of inclination with respect to the vertical of up to 10 °, preferably up to 5'C. The above-mentioned measures result in an almost loss-free guidance of the air flow - without impact and acceleration losses at the entry into the air shaft. A backflow of air generated by wind suction at the air shaft inlet or a gust of wind that propagates backwards from the chimney to the air shaft inlet is largely prevented by the reduced cross section of the air shaft inlet and by the rounded cross-sectional constriction with subsequent diffuser-like expansion 3 of the exhaust gas shaft or chimney head.

Den technischen Regeln für Luft-Abgas-Schornsteine (DVGW-Arbeitsblatt G 627) entsprechend ist die Luftzuführungsöffnung mindestens 10 cm unterhalb der Abgasausmündung angeordnet.In accordance with the technical regulations for air-flue gas chimneys (DVGW worksheet G 627), the air supply opening is arranged at least 10 cm below the flue gas outlet.

Der erfindungsgemäße Kaminkopf kann je nach Bauweise des Kamins als Aufsatz gefertigt und gegebenenfalls nachträglich auf den Kamin aufgesetzt werden oder beim Bau des Kamines als ein Teil desselben gefertigt werden.The chimney head according to the invention can, depending on the design of the chimney, be made as an attachment and, if necessary, be retrofitted onto the chimney or can be made as part of the chimney during construction.

Die erfindungsgemäße Ausbildung des Kaminkopfes hat zur Folge, daß die Druckdifferenzen zwischen Lufteintritt und Abgasaustritt an den einzelnen Feuerstätten sehr gering sind und auch bei starken Winden wenig schwanken.The design of the chimney head according to the invention has the result that the pressure differences between air inlet and exhaust gas outlet at the individual fireplaces are very small and fluctuate little even in strong winds.

Außerdem wird erreicht, daß die Druckdifferenzen an den einzelnen Feuerstätten unabhängig vom Standort, das heißt der Geschoßhöhe, in der die Feuerstätten mit den Kaminschächten verbunden sind, fast gleich sind, so daß auch die Feuerstätten in den oberen Stockwerken eines Hauses ohne Beeinträchtigung arbeiten.In addition, it is achieved that the pressure differences at the individual fireplaces are almost the same regardless of the location, that is to say the floor height at which the fireplaces are connected to the chimney shafts, so that the fireplaces on the upper floors of a house also work without impairment.

Für eine weitere Verringerung der Druckdifferenzen an den einzelnen Feuerstätten erwiesen sich Druckausgleichs-Öffnungen zwischen dem Luft- und dem Abgasschacht in der Nähe der Abgasstutzen oder konzentrisch zu den Abgasstutzen der Feuerstätten als zweckmäßig.For a further reduction in the pressure differences at the individual fireplaces, pressure equalization openings between the air and the flue gas chute near the flue gas nozzles or concentrically to the flue gas flanges of the fireplaces proved to be expedient.

Claims (4)

1. A flue terminal for room-sealed flue systems for taking clean combustion air to and venting products of combustion from all room-sealed appliances connected to any such room-sealed flue systems, characterized in that the cross section of the flue (2) at the top widens into a diffuser (3) and ends with a sharp upper edge (5), and further characterized in that the upper edge (6) of the air duct (1) is rounded from the outer edge towards said air duct and the cross section of said air duct is smaller in the rounded inlet edge area (6) than the cross section of the air duct proper and widens in a divergent section (7) to reach said cross section of the air duct proper.
2. A flue terminal according to claim 1 characterized in that the upper end of the flue duct (2) below the divergent section (3) contains a rounded restriction (4), and further characterized in that said restriction (4) is directly connected with the divergent section (3).
3. A flue terminal according to claim 1 or 2 characterized in that the angles between the divergent sections (3 and 7) of the air duct (1) and the flue duct (2) and a vertical line does not exceed 10 preferably 6°.
4. A flue terminal according to any one of claims 1 to 3 characterized in that the upper ends of the flue and the air duct forming the flue terminal are designed as wind shields.
EP80103309A 1979-06-21 1980-06-13 Chimney terminal for balanced flue Expired EP0021281B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80103309T ATE2697T1 (en) 1979-06-21 1980-06-13 CHIMNEY HEAD FOR AIR EXHAUST CHIMNEYS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2924963A DE2924963C2 (en) 1979-06-21 1979-06-21 Chimney head for air-exhaust chimneys
DE2924963 1979-06-21

Publications (2)

Publication Number Publication Date
EP0021281A1 EP0021281A1 (en) 1981-01-07
EP0021281B1 true EP0021281B1 (en) 1983-03-02

Family

ID=6073726

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80103309A Expired EP0021281B1 (en) 1979-06-21 1980-06-13 Chimney terminal for balanced flue

Country Status (3)

Country Link
EP (1) EP0021281B1 (en)
AT (1) ATE2697T1 (en)
DE (1) DE2924963C2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3332298C2 (en) * 1983-09-07 1987-02-26 Philipp Kreis GmbH & Co Truma-Gerätebau, 8000 München External wall box for the combustion air and exhaust gas duct of a device operating with a burner system
EP0173449B1 (en) * 1984-08-02 1989-11-15 Myson Heating Ltd Terminal unit for a balanced flue

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH36697A (en) * 1906-08-27 1907-02-15 Karl Gschwend Chimney attachment
FR584652A (en) * 1924-08-14 1925-02-11 Duchateau Sa Des Ets Appliance adapting to chimneys, forming a natural vacuum cleaner and eliminating windshields or similar devices
DE557299C (en) * 1929-10-25 1932-08-20 E H Hugo Junkers Dr Ing Firing system, especially for gas firing
GB677526A (en) * 1949-05-30 1952-08-20 John Charles Snelling Improvements in flues for gas fired appliances
DE1155557B (en) * 1961-02-13 1963-10-10 Adolph Giesl Gieslingen Dipl I Blowpipe system for steam locomotives with a diffuser-like upward widening chimney of elongated, especially oval cross-sectional shape and one or more blowpipes
AT248063B (en) * 1962-12-10 1966-07-11 Junkers & Co Device for connecting gas-heated devices with a closed combustion chamber to a ventilated chimney
FR1438486A (en) * 1965-03-31 1966-05-13 Arrangement of ducts for the supply of fresh air to closed-circuit devices and the evacuation of the products coming from them
BE758437A (en) * 1969-11-14 1971-04-16 Metaalfab Joh Th Benraad N V FACADE HEATING DEVICE WITH A HEAT EXCHANGER
FR2151584A5 (en) * 1971-09-03 1973-04-20 Tokyo Gas Co Ltd
DE7706857U1 (en) * 1977-03-05 1978-08-03 Jacob Plein-Wagner Soehne Steinzeugwarenfabrik, 5522 Speicher CHIMNEY PIPE WITH A PLUMB RIGHT CHIMNEY PIPE AND SIDE CONNECTION FOR A SMOKE PIPE

Also Published As

Publication number Publication date
DE2924963C2 (en) 1985-09-05
ATE2697T1 (en) 1983-03-15
EP0021281A1 (en) 1981-01-07
DE2924963A1 (en) 1981-01-22

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