EP2885542B1 - Blower device with integrated manifold for a gas burner - Google Patents

Blower device with integrated manifold for a gas burner Download PDF

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Publication number
EP2885542B1
EP2885542B1 EP13739392.2A EP13739392A EP2885542B1 EP 2885542 B1 EP2885542 B1 EP 2885542B1 EP 13739392 A EP13739392 A EP 13739392A EP 2885542 B1 EP2885542 B1 EP 2885542B1
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EP
European Patent Office
Prior art keywords
manifold
housing
fan
gas
blower
Prior art date
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Application number
EP13739392.2A
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German (de)
French (fr)
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EP2885542A1 (en
Inventor
Martin Hertreiter
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Ebm Papst Landshut GmbH
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Ebm Papst Landshut GmbH
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Publication of EP2885542A1 publication Critical patent/EP2885542A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/34—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air
    • F23D14/36—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air in which the compressor and burner form a single unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/083—Sealings especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/82—Preventing flashback or blowback
    • F23D14/825—Preventing flashback or blowback using valves
    • 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
    • F23L5/00—Blast-producing apparatus before the fire
    • F23L5/02—Arrangements of fans or blowers

Definitions

  • the invention relates to a blower device for connection to a gas burner, which is designed as a premixing blower for gas and combustion air.
  • Premixing blower devices are used, inter alia, in heating systems with gas burners for heating domestic water and / or heating water.
  • Pre-mixing blowers are known from the prior art, at the outlet of which the mixed gas-air mixture is distributed over a manifold and thus supplied to the gas burner over a larger area.
  • a manifold is defined as any component which is suitable for supplying a gas-air mixture conveyed by the blower to the gas burner via an area which is larger in relation to the blower outlet.
  • the manifold is attached via a flange to the outlet of the blower device. Since a gas-air mixture is conveyed with the blower device according to the invention, this connection is to form with a suitable gas for gasket seal and corresponding fasteners.
  • the kummer thus connected to the blower housing must meet the requirements of tightness over its entire life and be tested for leaks before use.
  • a multi-part design of the blower housing and manifold is thus not only erintensiv, but also more expensive in the assembly and leak testing.
  • blower device which is suitable for connection to a gas burner and designed to varzumischen a gas-air mixture before being supplied to the gas burner, wherein they a blower housing and integrally formed thereon, for connection to the Includes gas burner provided manifold.
  • the manifold can be integrated into the blower housing in an overall component.
  • a sealed interface between the blower housing and manifold, as is common in the prior art, can thus be omitted.
  • Fasteners such as screws or the like and between the blower housing and the manifold to be provided so far seal are obsolete.
  • the blower housing is formed from a lower housing part and a housing cover, wherein the manifold connects at least to the lower housing part.
  • the lower housing part is the component of the blower device, which essentially forms the flow path for the conveyed air or in the flow direction after the gas inlet for the gas-air mixture. It is therefore favorable to integrate the gas supply in the fan base.
  • a return flow protection is provided, which is formed sealingly and thus prevents the already promoted to the manifold gas-air mixture after a shutdown or Failure of the fan can flow back into the area of the blower housing. It is also excluded that, in the event of overpressure in the exhaust system, exhaust gas returns to the area of the blower housing.
  • the system of the blower housing is thus fluidly separated from the system of the manifold and the subsequent gas burner by the closed and sealed remindströmschutz.
  • the backflow protection is designed as a flap which can be opened on one side, which is opened or kept open during operation by the flow generated by the fan, and closes in a gravity-controlled manner when the fan is switched off.
  • the flap is made of rubber or silicone.
  • the transition region from the blower housing to the manifold of a preferred embodiment is designed such that the housing cover not only covers the blower housing but also parts of the manifold, but in any case the area in which the backflow preventer is located at the blower outlet.
  • the manifold is provided in the area covered by the housing cover with a recess corresponding to the shape.
  • the housing cover in which the housing cover extends into the region of the manifold, the housing cover is attached to the manifold and to the housing lower part.
  • the flow pressure is reduced by the increased area in the region of the manifold, so that the sealing of the housing cover is simplified at the manifold.
  • FIGS. 1 and 2 only the features necessary for understanding the invention are shown schematically by way of example. Like reference numerals designate like parts.
  • FIG. 1 the blower device 1 made of die-cast aluminum for connection to a gas burner 10 is shown in a perspective illustration in the installed state.
  • the motor for driving the blower is covered by a motor protection cap 9 is placed.
  • a gas valve 11 is arranged, which is connected to the integrated gas inlet 6 in the blower lower part 4 (see FIG. 2 ) is connected and provides the gas supply.
  • the fan housing 2 is formed from the lower housing part 4 and the housing cover 5, wherein the manifold 3 is integrally integrated in the illustrated embodiment in the lower housing part 4 of the blower housing 2.
  • the manifold 3 is partially covered by the housing cover 5, wherein in the manifold 3 for this purpose a corresponding in FIG. 2 to be recognized recess is provided.
  • FIG. 2 shows the one-piece housing lower part 4 with the manifold 3 connected thereto FIG. 1 without the additional components.
  • a return flow protection 7 designed as a flap is provided in the flow region, which prevents backflow of the gas-air mixture or exhaust gas from the region of the manifold 3 back into the blower housing 2.
  • the lower housing part 4 and the manifold 3 are formed such that the housing cover 5 of Figure 1 completely covers the remindström attacks 7 and this is thus accessible both during assembly and during removal of the housing cover 5.
  • the housing cover 5 can be fastened at different points on the housing lower part 4. Also on the manifold 3 attachment points 13 are provided for attachment of the housing cover 5.
  • the remindströmschutz 7 is designed as a sealing flap made of silicone and rotatably mounted in the flow channel or by means of hinge, so that it is gravity-controlled in the uninfluenced state goes into its sealing closed position.
  • a flap it is opened by means of the flow in the direction of arrow P in the direction of the bend 3 by an opening movement, wherein the opening movement is made possible only in the direction of the bend 3.
  • the flap is sealingly on both the housing cover 5 and the lower housing part 4, wherein in the latter additionally a circumferential groove is provided, against which the flap applies a sealing.
  • the housing outlet 8 of the lower housing part 4 extends into the manifold 3 in order to ensure a uniform distribution of the gas-air mixture within the manifold 3.
  • blower device 1 first gas is supplied with combustion air pre-mixed within the blower housing 2 via the gas valve 11 and then conveyed into the manifold 3, to be supplied here flat to the gas burner 10.

Description

Die Erfindung betrifft eine Gebläsevorrichtung zum Anschluss an einen Gasbrenner, die als Vormischgebläse für Gas und Verbrennungsluft ausgebildet ist. Vormischende Gebläsevorrichtungen werden unter anderem in Heizungsanlagen mit Gasbrennern zur Erwärmung von Brauch- und/oder Heizungswasser eingesetzt.The invention relates to a blower device for connection to a gas burner, which is designed as a premixing blower for gas and combustion air. Premixing blower devices are used, inter alia, in heating systems with gas burners for heating domestic water and / or heating water.

Aus dem Stand der Technik sind vormischende Gebläse bekannt, an deren Auslass das gemischte Gas-Luft-Gemisch über einen Krümmer verteilt und somit dem Gasbrenner über eine größere Fläche zugeführt wird. Als Krümmer ist erfindungsgemäß jedes Bauteil definiert, das geeignet ist, ein von dem Gebläse gefördertes Gas-Luft-Gemisch dem Gasbrenner über eine gegenüber dem Gebläseauslass vergrößerte Fläche zuzuführen. Bei Ausführungen gemäß dem Stand der Technik wird der Krümmer über einen Flansch an dem Auslass der Gebläsevorrichtung angebracht. Da mit der erfindungsgemäßen Gebläsevorrichtung ein Gas-Luft-Gemisch gefördert wird, ist dieser Anschluss mit einer zur Gasförderung geeigneten Dichtung und entsprechenden Befestigungselementen auszubilden. Der derart an das Gebläsegehäuse angeschlossene Kümmer muss die Dichtheitsanforderungen über die gesamte Lebensdauer erfüllen und vor dem Einsatz entsprechend auf Dichtheit geprüft werden. Eine mehrteilige Ausbildung des Gebläsegehäuses und Krümmers ist somit nicht nur teileintensiv, sondern auch aufwendiger bei der Montage und Dichtheitsprüfung.Pre-mixing blowers are known from the prior art, at the outlet of which the mixed gas-air mixture is distributed over a manifold and thus supplied to the gas burner over a larger area. According to the invention, a manifold is defined as any component which is suitable for supplying a gas-air mixture conveyed by the blower to the gas burner via an area which is larger in relation to the blower outlet. In prior art designs, the manifold is attached via a flange to the outlet of the blower device. Since a gas-air mixture is conveyed with the blower device according to the invention, this connection is to form with a suitable gas for gasket seal and corresponding fasteners. The Kümmer thus connected to the blower housing must meet the requirements of tightness over its entire life and be tested for leaks before use. A multi-part design of the blower housing and manifold is thus not only teileintensiv, but also more expensive in the assembly and leak testing.

Druckschriftlicher Stand der Technik ist durch die Dokumente US 2005/178344 A1 , EP 0 834 695 A1 und DE 203 08 866 U1 vorbekannt, wobei das Dokument US 2005/178344 A1 den Oberbegriff von Anspruch 1 offenbart. Vor diesem Hintergrund ist es die Aufgabe der Erfindung, eine Gebläsevorrichtung bereitzustellen, bei der die Anzahl der notwendigen Bauteile reduziert sowie die Anzahl der Montageschritte verringert und die Gefahr von Gasleckagen über die Lebensdauer des Bauteils ausgeschlossen wird.Prior art is through the documents US 2005/178344 A1 . EP 0 834 695 A1 and DE 203 08 866 U1 previously known, the document US 2005/178344 A1 discloses the preamble of claim 1. Against this background, it is the object of the invention to provide a blower device, in which the number of necessary components is reduced and the number of assembly steps is reduced and the risk of gas leaks over the life of the component is excluded.

Diese Aufgaben werden durch eine Gebläsevorrichtung nach Patentanspruch 1 gelöst, die zum Anschluss an einen Gasbrenner geeignet und ausgebildet ist, ein Gas-Luft-Gemisch vor der Zuführung an den Gasbrenner varzumischen, wobei sie ein Gebläsegehäuse und ein einteilig daran ausgebildeten, zum Anschluss an den Gasbrenner vorgesehenen Krümmer umfasst.These objects are achieved by a blower device according to claim 1, which is suitable for connection to a gas burner and designed to varzumischen a gas-air mixture before being supplied to the gas burner, wherein they a blower housing and integrally formed thereon, for connection to the Includes gas burner provided manifold.

Durch die einteilige Ausbildung kann der Krümmer in das Gebläsegehäuse in ein Gesamtbauteil integriert werden. Eine abzudichtende Schnittstelle zwischen Gebläsegehäuse und Krümmer, wie sie im Stand der Technik üblich ist, kann somit entfallen. Befestigungselemente wie Schrauben oder dergleichen und eine zwischen dem Gebläsegehäuse und dem Krümmer bisher vorzusehenden Dichtung werden obsolet. Ferner ist durch die einteilige Ausbildung des Gebläsegehäuses mit dem Krümmer über die gesamte Lebensdauer des Bauteils sichergestellt, dass im Übergangsbereich von Gebläsegehäuse und Krümmer keine Gasleckage auftritt, ohne dass hierzu eine besondere Dichtung vorzusehen wäre. Eine Dichtheitsprüfung des Übergangsbereichs entfällt.Due to the one-piece design, the manifold can be integrated into the blower housing in an overall component. A sealed interface between the blower housing and manifold, as is common in the prior art, can thus be omitted. Fasteners such as screws or the like and between the blower housing and the manifold to be provided so far seal are obsolete. Furthermore, it is ensured by the one-piece design of the blower housing with the manifold over the entire life of the component that in the transition region of the blower housing and manifold no gas leakage occurs without the need for a special seal would provide. A leak test of the transition area is eliminated.

In einer bevorzugten Ausführung der Erfindung ist das Gebläsegehäuse aus einem Gehäuseunterteil und einem Gehäusedeckel gebildet, wobei sich der Krümmer zumindest an das Gehäuseunterteil anschließt. Das Gehäuseunterteil ist das Bauteil der Gebläsevorrichtung, das im Wesentlichen den Strömungsweg für die geförderte Luft beziehungsweise in Strömungsrichtung nach dem Gaseintritt für das Gas-Luft-Gemisch bildet. Günstig ist deshalb, die Gaszuführung in das Gebläseunterteil zu integrieren.In a preferred embodiment of the invention, the blower housing is formed from a lower housing part and a housing cover, wherein the manifold connects at least to the lower housing part. The lower housing part is the component of the blower device, which essentially forms the flow path for the conveyed air or in the flow direction after the gas inlet for the gas-air mixture. It is therefore favorable to integrate the gas supply in the fan base.

In einer Ausführung der Erfindung ist vorgesehen, dass in einem Übergangsbereich von dem Gebläsegehäuse zu dem Krümmer im Strömungsbereich ein Rückströmschutz vorgesehen ist, der dichtend ausgebildet ist und mithin verhindert, dass das bereits bis in den Krümmer geförderte Gas-Luft-Gemisch nach einem Abschalten oder einem Ausfall des Gebläses zurück in den Bereich des Gebläsegehäuses strömen kann. Auch ist ausgeschlossen, dass im Falle eines Überdrucks im Abgassystem Abgas zurück in den Bereich des Gebläsegehäuses gelangt. Das System des Gebläsegehäuses ist somit strömungstechnisch von dem System des Krümmers und dem nachfolgenden Gasbrenner durch den geschlossenen und dichten Rückströmschutz getrennt.In one embodiment of the invention it is provided that in a transition region from the blower housing to the manifold in the flow area a return flow protection is provided, which is formed sealingly and thus prevents the already promoted to the manifold gas-air mixture after a shutdown or Failure of the fan can flow back into the area of the blower housing. It is also excluded that, in the event of overpressure in the exhaust system, exhaust gas returns to the area of the blower housing. The system of the blower housing is thus fluidly separated from the system of the manifold and the subsequent gas burner by the closed and sealed Rückströmschutz.

In einer vorteilhaften Ausführung ist der Rückströmschutz als einseitig zu öffnende Klappe ausgebildet, die im Betrieb durch die von dem Gebläse erzeugte Strömung geöffnet bzw. offen gehalten wird, und bei einem Abschalten des Gebläses schwerkraftgesteuert schließt. Vorzugsweise ist die Klappe aus Gummi beziehungsweise aus Silikon gebildet.In an advantageous embodiment, the backflow protection is designed as a flap which can be opened on one side, which is opened or kept open during operation by the flow generated by the fan, and closes in a gravity-controlled manner when the fan is switched off. Preferably, the flap is made of rubber or silicone.

Der Übergangsbereich von dem Gebläsegehäuse zu dem Krümmer ist einer bevorzugten Ausführung derart gestaltet, dass der Gehäusedeckel nicht nur das Gebläsegehäuse, sondern auch Teile des Krümmers überdeckt, in jedem Fall aber den Bereich, in dem der Rückströmschutz am Gebläseauslass angeordnet ist. Der Krümmer ist in dem Bereich, der von dem Gehäusedeckel überdeckt wird mit einer der Form entsprechenden Aussparung versehen. Mit einer derartigen Anordnung und Ausbildung des Gebläsegehäuses und des Krümmers kann der Rückströmschutz als einteiliges Bauteil ohne zusätzliche Trennstelle in das Gebläseunterteil integriert werden. Bei der Ausbildung, bei welcher der Gehäusedeckel den Rückströmschutz überdeckt, ist für diesen ferner eine gute Zugänglichkeit für eine einfache Montage und mögliche Wartung gewährleistet.
In der Ausführung der Erfindung, in der sich der Gehäusedeckel bis in den Bereich des Krümmers erstreckt, ist der Gehäusedeckel am Krümmer sowie an dem Gehäuseunterteil befestigt. Der Strömungsdruck verringert sich durch die vergrößerte Fläche im Bereich des Krümmers, so dass die Abdichtung des Gehäusedeckels am Krümmer vereinfacht wird.The transition region from the blower housing to the manifold of a preferred embodiment is designed such that the housing cover not only covers the blower housing but also parts of the manifold, but in any case the area in which the backflow preventer is located at the blower outlet. The manifold is provided in the area covered by the housing cover with a recess corresponding to the shape. With a Such arrangement and design of the blower housing and the manifold, the Rückströmschutz can be integrated as a one-piece component without additional separation point in the fan base. In the training, in which the housing cover covers the Rückströmschutz, this is also a good accessibility for easy installation and possible maintenance guaranteed.
In the embodiment of the invention, in which the housing cover extends into the region of the manifold, the housing cover is attached to the manifold and to the housing lower part. The flow pressure is reduced by the increased area in the region of the manifold, so that the sealing of the housing cover is simplified at the manifold.

Zur Vorbestimmung des Verlaufs der aus dem Gehäuse in den Krümmer eintretenden Strömung ist erfirdungsgemäß vorgesehen, dass sich der Gebläseauslass beziehungsweise Teile hiervon mit vorbestimmter Formgebung zur definierten Strömungserzeugung innerhalb des Krümmers in den Krümmer hinein erstreckt.
Ferner ist günstig, die Gebläsevorrichtung mit dem einteilig in das Gebläsegehäuse integrierten Krümmer aus Aluminiumdruckguss herzustellen. Die Werkzeugkosten sind hierbei besonders gering, da die erfindungsgemäße Gebläsevorrichtung als einfaches "Auf-Zu-Gehäuse" ausgebildet ist.
Andere vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet bzw. werden nachstehend zusammen mit der Beschreibung der bevorzugten Ausführung der Erfindung anhand der Figuren näher dargestellt.
Es zeigen:

Fig. 1
eine perspektivische Ansicht der Gebläsevorrichtung mit angeschlossenen Bauteile, und
Fig. 2
eine perspektivische Ansicht der Gebläsevorrichtung ohne Gehäusedeckel.
To predetermine the course of the flow entering from the housing into the manifold, it is provided according to the invention that the blower outlet or parts thereof with a predetermined shape for defined flow generation extend inside the bend into the bend.
Furthermore, it is advantageous to produce the blower device with the integrally formed in the blower housing manifold made of die-cast aluminum. The tooling costs here are particularly low, since the blower device according to the invention is designed as a simple "open-close-housing".
Other advantageous developments of the invention are characterized in the subclaims or are shown in more detail below together with the description of the preferred embodiment of the invention with reference to FIGS.
Show it:
Fig. 1
a perspective view of the fan device with connected components, and
Fig. 2
a perspective view of the blower device without housing cover.

In den Figuren 1 und 2 sind lediglich die zum Verständnis der Erfindung notwendigen Merkmale beispielhaft schematisch dargestellt. Gleiche Bezugszeichen benennen gleiche Teile.In the FIGS. 1 and 2 only the features necessary for understanding the invention are shown schematically by way of example. Like reference numerals designate like parts.

In Figur 1 ist die Gebläsevorrichtung 1 aus Aluminiumdruckguss zum Anschluss an einen Gasbrenner 10 in einer perspektivischen Darstellung im eingebauten Zustand gezeigt. Auf dem Gebläsegehäuse 2 ist der Motor zum Antrieb des Gebläses bedeckt durch eine Motorschutzkappe 9 aufgesetzt. An dem Gebläseunterteil 4 des Gebläsegehäuses 2 ist ein Gasventil 11 angeordnet, das an der in das Gebläseunterteil 4 integrierten Gaszuführung 6 (siehe Figur 2) angeschlossen ist und die Gaszufuhr bereitstellt. Das Gebläsegehäuse 2 ist aus dem Gehäuseunterteil 4 und dem Gehäusedeckel 5 gebildet, wobei der Krümmer 3 in der dargestellten Ausführung einteilig in das Gehäuseunterteil 4 des Gebläsegehäuses 2 integriert ist. Der Krümmer 3 wird teilweise von dem Gehäusedeckel 5 abgedeckt, wobei im Krümmer 3 hierfür eine entsprechende in Figur 2 zu erkennende Aussparung vorgesehen ist.In FIG. 1 1, the blower device 1 made of die-cast aluminum for connection to a gas burner 10 is shown in a perspective illustration in the installed state. On the blower housing 2, the motor for driving the blower is covered by a motor protection cap 9 is placed. At the fan lower part 4 of the blower housing 2, a gas valve 11 is arranged, which is connected to the integrated gas inlet 6 in the blower lower part 4 (see FIG. 2 ) is connected and provides the gas supply. The fan housing 2 is formed from the lower housing part 4 and the housing cover 5, wherein the manifold 3 is integrally integrated in the illustrated embodiment in the lower housing part 4 of the blower housing 2. The manifold 3 is partially covered by the housing cover 5, wherein in the manifold 3 for this purpose a corresponding in FIG. 2 to be recognized recess is provided.

Figur 2 zeigt das einteilige Gehäuseunterteil 4 mit dem daran angeschlossenen Krümmer 3 aus Figur 1 ohne die zusätzlichen Bauteile. In dem Übergangsbereich von dem Gehäuseunterteil 4 zu dem Krümmer 3 ist im Strömungsbereich ein als Klappe ausgebildeter Rückströmschutz 7 vorgesehen, der eine Rückströmung des Gas-Luft-Gemischs oder Abgases von dem Bereich des Krümmers 3 zurück in das Gebläsegehäuse 2 verhindert. Das Gehäuseunterteil 4 und der Krümmer 3 sind derart ausgebildet, dass der Gehäusedeckel 5 aus Figur 1 den Rückströmschutz 7 vollständig überdeckt und dieser somit sowohl bei der Montage als auch beim Entfernen des Gehäusedeckels 5 zugänglich ist. Der Gehäusedeckel 5 kann an verschiedenen Punkten am Gehäuseunterteil 4 befestigt werden. Auch am Krümmer 3 sind Befestigungspunkte 13 zur Befestigung des Gehäusedeckels 5 vorgesehen. Der Rückströmschutz 7 ist als dichtende Klappe aus Silikon ausgebildet und im Strömungskanal drehbar oder mittels Scharniergelenk gelagert, sodass er im unbeeinflussten Zustand schwerkraftgesteuert in seine dichtende Schließstellung übergeht. Bei der gezeigten Ausführung als Klappe, wird diese mittels der Strömung in Pfeilrichtung P in Richtung des Krümmers 3 durch eine aufklappende Bewegung geöffnet, wobei die Öffnungsbewegung nur in Richtung des Krümmers 3 ermöglicht wird. In der Schließstellung liegt die Klappe dichtend sowohl am Gehäusedeckel 5 als auch am Gehäuseunterteil 4 an, wobei in letzterem zusätzlich eine umlaufende Nut vorgesehen ist, an die sich die Klappe dichtend anlegt. Der Gehäuseauslass 8 des Gehäuseunterteils 4 erstreckt sich in den Krümmer 3 hinein, um eine gleichmäßige Verteilung des Gas-Luft-Gemischs innerhalb des Krümmers 3 zu gewährleisten. FIG. 2 shows the one-piece housing lower part 4 with the manifold 3 connected thereto FIG. 1 without the additional components. In the transition region from the housing lower part 4 to the manifold 3, a return flow protection 7 designed as a flap is provided in the flow region, which prevents backflow of the gas-air mixture or exhaust gas from the region of the manifold 3 back into the blower housing 2. The lower housing part 4 and the manifold 3 are formed such that the housing cover 5 of Figure 1 completely covers the Rückströmschutz 7 and this is thus accessible both during assembly and during removal of the housing cover 5. The housing cover 5 can be fastened at different points on the housing lower part 4. Also on the manifold 3 attachment points 13 are provided for attachment of the housing cover 5. The Rückströmschutz 7 is designed as a sealing flap made of silicone and rotatably mounted in the flow channel or by means of hinge, so that it is gravity-controlled in the uninfluenced state goes into its sealing closed position. In the embodiment shown as a flap, it is opened by means of the flow in the direction of arrow P in the direction of the bend 3 by an opening movement, wherein the opening movement is made possible only in the direction of the bend 3. In the closed position, the flap is sealingly on both the housing cover 5 and the lower housing part 4, wherein in the latter additionally a circumferential groove is provided, against which the flap applies a sealing. The housing outlet 8 of the lower housing part 4 extends into the manifold 3 in order to ensure a uniform distribution of the gas-air mixture within the manifold 3.

Mit der Gebläsevorrichtung 1 wird zunächst innerhalb des Gebläsegehäuses 2 über das Gasventil 11 zugeführtes Gas mit Verbrennungsluft vorgemischt und anschließend in den Krümmer 3 gefördert, um hier flächig dem Gasbrenner 10 zugeführt zu werden.With the blower device 1 first gas is supplied with combustion air pre-mixed within the blower housing 2 via the gas valve 11 and then conveyed into the manifold 3, to be supplied here flat to the gas burner 10.

Claims (9)

  1. Fan device to be connected to a gas burner formed to premix a gas-air-mixture prior to delivery to the gas burner having
    a fan housing (2) comprising a fan outlet (8) and
    a manifold (3) formed integrally to the fan housing (2) to be connected to the gas burner, wherein
    the manifold is designed to deliver the gas-air-mixture conveyed by the fan device to the gas burner via an extended surface area compared to the fan outlet (8), characterized in that
    the fan outlet (8), respectively parts thereof, having a predetermined shape to generate a defined flow within the manifold (3) extend into the manifold (3).
  2. Fan device according to claim 1, wherein the fan housing (2) is formed from a housing lower part (4) and a housing cover (5), in which the manifold (3) is connected at least to the housing lower part (4).
  3. Fan device according to claim 1 or 2, wherein a gas inlet (6) is integrated into the fan housing (2).
  4. Fan device according to at least one of the preceding claims, wherein a backflow protection (7) is provided in a transition region of the fan housing (2) to the manifold (3) in the flow area.
  5. Fan device according to claim 4, wherein a backflow protection (7) is formed as a flap which can be opened to one side.
  6. Fan device according to claim 4 or 5, wherein the backflow protection (7) is sealing and/or made of rubber.
  7. Fan device according to at least one of the preceding claims 4 to 6, wherein the fan housing (2) covers the backflow protection (7).
  8. Fan device according to at least one of the preceding claims 2 to 7, wherein the housing cover (5) extends in the area of the manifold (3) and is attachable to it.
  9. Fan device according to at least one of the preceding claims, wherein it is made of aluminium die casting.
EP13739392.2A 2012-08-03 2013-07-12 Blower device with integrated manifold for a gas burner Active EP2885542B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012107128.4A DE102012107128A1 (en) 2012-08-03 2012-08-03 Blower with integrated manifold
PCT/EP2013/064862 WO2014019835A1 (en) 2012-08-03 2013-07-12 Blower device with integrated manifold for a gas burner

Publications (2)

Publication Number Publication Date
EP2885542A1 EP2885542A1 (en) 2015-06-24
EP2885542B1 true EP2885542B1 (en) 2018-02-21

Family

ID=48808319

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13739392.2A Active EP2885542B1 (en) 2012-08-03 2013-07-12 Blower device with integrated manifold for a gas burner

Country Status (3)

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EP (1) EP2885542B1 (en)
DE (2) DE102012107128A1 (en)
WO (1) WO2014019835A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3015768B1 (en) 2014-10-29 2019-02-20 Honeywell Technologies Sarl Assembly comprising a gas valve, a fan, a gas/air mixer and a burner door
JP6529364B2 (en) * 2015-07-09 2019-06-12 リンナイ株式会社 Water heater
JP6534333B2 (en) 2015-10-19 2019-06-26 リンナイ株式会社 Water heater
JP6534337B2 (en) * 2015-10-26 2019-06-26 リンナイ株式会社 Water heater
DE102019112644A1 (en) * 2019-05-14 2020-11-19 Ebm-Papst Landshut Gmbh Fan housing of a gas fan with redundant non-return valves
JP2022098738A (en) * 2020-12-22 2022-07-04 株式会社ノーリツ Combustion device and hot water device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0834695B1 (en) * 1996-10-03 1999-09-01 Siabs Industry S.R.L. A device for supplying a gas-air mixture to burners, particularly for heating apparatuses
DE20308866U1 (en) * 2003-06-06 2003-08-14 Buderus Heiztechnik Gmbh Non-return flap, for the gas/air flow channel from the fan blower to the gas burning surfaces in a multi-stage gas burner, is a thin blade mounted at one end with a seal around its circumference and tensed against the channel wall
US20050178344A1 (en) * 2004-02-17 2005-08-18 Garrett Michael K. Gas delivery system with pre-mix blower

Also Published As

Publication number Publication date
EP2885542A1 (en) 2015-06-24
WO2014019835A1 (en) 2014-02-06
DE202012012538U1 (en) 2013-04-29
DE102012107128A1 (en) 2014-02-06

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