EP1714079A1 - Mixing device for mixing gas and combustion air for a gas burner and gas burner - Google Patents

Mixing device for mixing gas and combustion air for a gas burner and gas burner

Info

Publication number
EP1714079A1
EP1714079A1 EP05707196A EP05707196A EP1714079A1 EP 1714079 A1 EP1714079 A1 EP 1714079A1 EP 05707196 A EP05707196 A EP 05707196A EP 05707196 A EP05707196 A EP 05707196A EP 1714079 A1 EP1714079 A1 EP 1714079A1
Authority
EP
European Patent Office
Prior art keywords
gas
mixing device
monolithic unit
housing
venturi nozzle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05707196A
Other languages
German (de)
French (fr)
Other versions
EP1714079B1 (en
Inventor
Roelof Thiewes
Gerrit Jan Baarda
Tieme De Jonge
Enno Vrolijk
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.)
Garrett Motion SARL
Original Assignee
Honeywell Technologies SARL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Honeywell Technologies SARL filed Critical Honeywell Technologies SARL
Publication of EP1714079A1 publication Critical patent/EP1714079A1/en
Application granted granted Critical
Publication of EP1714079B1 publication Critical patent/EP1714079B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/62—Mixing devices; Mixing tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2212/00—Burner material specifications

Definitions

  • Mixing device for mixing gas and combustion air for a gas burner and gas burner
  • the invention relates to a mixing device for mixing gas and combustion air for a gas burner according to the preamble of claim 1. Furthermore, the invention relates to a gas burner according to the preamble of claim 13.
  • Mixing devices with a Venturi nozzle are used to mix two gaseous media, in particular combustion air and fuel gas, for a burner.
  • DE 197 29 047 C1 discloses a mixing device for a gas burner for producing a mixture of gas and combustion air, which has a housing and a separately formed Venturi nozzle.
  • the mixing device according to the prior art is therefore formed at least in two parts, the venturi nozzle and the housing being designed as separate assemblies.
  • the housing of the mixing device is formed from a metallic material and the Venturi nozzle from a plastic.
  • the venturi nozzle and the housing of the mixing device are fastened separately from one another to a support plate of a blower.
  • the multi-part design of the mixing device increases assembly, production and manufacturing costs.
  • the present invention is based on the problem of creating a novel mixing device for mixing gas and combustion air for a gas burner and a novel gas burner.
  • This problem is solved by a mixing device for mixing gas and combustion air for a gas burner with the features of claim 1.
  • the venturi nozzle is integrated into the housing such that the housing and the venturi nozzle are designed as a monolithic unit.
  • the monolithic unit consisting of the housing and the venturi nozzle is preferably made of plastic.
  • the Venturi nozzle into the housing of the mixing device in such a way that the housing and the Venturi nozzle are designed as a monolithic unit.
  • the Venturi nozzle is therefore an integral part of the housing of the mixing device. This reduces the number of assemblies to be manufactured. This minimizes the production effort, assembly effort and the manufacturing costs.
  • the monolithic, plastic unit consisting of the housing and the venturi nozzle is fastened to a metallic support plate of the fan by means of a bayonet catch.
  • a gas control device continues to act on the monolithic unit comprising the housing and the venturi nozzle, a gas outlet connector of the gas control device being insertable into a corresponding recess in the monolithic unit.
  • the gas control unit is attached to the monolithic unit consisting of the housing and the venturi nozzle via a snap lock.
  • the gas burner according to the invention is defined in claim 13.
  • FIG. 1 a mixing device according to the invention for mixing gas and combustion air for a gas burner together with a gas control device and a mounting plate of a blower in cross section; and FIG. 2: the mixing device according to the invention for mixing gas and combustion air for a gas burner in a view turned out from the drawing plane according to FIG. 1 by 90 °, but without the gas control device.
  • FIG. 1 shows a cross section of a mixing device 10 according to the invention, a gas control device 11 and a support plate 12 of a blower being shown in FIG. 1 in addition to the mixing device 10 according to the invention.
  • a housing and a venturi nozzle of the mixing device 10 are designed as an integral and thus monolithic unit.
  • the housing of the mixing device 10 is visualized in FIG. 1 by a reference number 13, the venturi nozzle by a reference number 14.
  • the monolithic unit consisting of housing 13 and venturi nozzle 14 forms a flow channel for gas and combustion air. Combustion air can be sucked in at an inlet opening 15 of this flow channel. At an opposite outlet opening 16 of the flow channel, the blower engages with the support plate 17 and provides a suction pressure in order to suck in the mixture of gas and combustion air at the outlet opening 16.
  • a recess is made in the housing 13 of the mixing device 10 in a section between the inlet opening 15 and the outlet opening 16, into which a gas outlet connection 17 of the gas control device 11 engages.
  • This recess is extended by a gas routing channel 18 which extends into the one that extends between the inlet opening 15 and the outlet opening 16 Flow channel opens and thus introduces the fuel gas through an opening opening radially into the flow channel.
  • the monolithic unit comprising the housing 13 and the venturi nozzle 14 is formed from a plastic.
  • the monolithic unit made of plastic, consisting of housing 13 and venturi nozzle 14, is fastened to the metallic support plate 12 of the blower, specifically in the sense of the present invention via a quick-release fastener designed as a bayonet fastener 19.
  • recesses 20 are made in the support plate 12, into which correspondingly designed projections or cams 21 of the housing 13 of the mixing device 10 can be inserted.
  • the projections 21 are assigned to the outlet-side end of the monolithic unit comprising the housing 13 and the venturi nozzle 14.
  • the projections 21 After insertion of the projections 21 into the recesses 20 of the support plate 12 and after a relative rotation between the monolithic unit and the support plate 12, the projections 21 secure the mixing device 10 in its position on the support plate 12 of the fan.
  • the bayonet lock 19 is therefore used for the quick, detachable fastening of the mixing device 10 to the support plate 12 of the fan.
  • the attachment can be done without additional aids.
  • the connection between the mixing device 10 and the fan is therefore reversible and can be released again.
  • the depth of insertion of the outlet-side end of the monolithic unit consisting of housing 13 and venturi nozzle 14 into the support plate 12 of the fan is limited by a stop 22.
  • the stop 22 like the projections 21, is assigned to the outlet-side end of the housing 13.
  • the fastening of the monolithic unit consisting of the housing 13 and the venturi nozzle 14 to the support plate 12 of the fan is sealed by a sealing device 23.
  • the sealing device 23 is designed as a so-called O-ring and ensures that Tightness of the connection also over a longer operating time, within which material changes or deformations of the mixing device 10 made of plastic can occur.
  • the gas control device 11 is also fastened to the monolithic unit comprising the housing 13 and the venturi nozzle 14 by means of a quick-release fastener.
  • the gas control device 11 engages with the gas outlet stub 17 in the corresponding recess within the monolithic unit.
  • a securing bracket 24 assigned to the monolithic unit engages around the gas outlet connector 17 at least in sections in the sense of a snap closure can therefore be done without tools.
  • the fastening of the gas control device 11 via the gas outlet connector 17 to the monolithic unit comprising the housing 13 and the venturi nozzle 14 is also sealed by means of a sealing device 25.
  • This sealing device 25 is also designed as a so-called O-ring and ensures permanent sealing of the detachable connection between the gas control device 11 and the mixing device 10.
  • a gas nozzle 26 is positioned in the area of the gas outlet connection 17.
  • the gas nozzle 26 is designed as a separate component and projects into the gas outlet connection 17.
  • a mixing device for a gas burner in which the venturi nozzle 14 is an integral part of the housing 13.
  • the monolithic unit from housing 13 and Venturi nozzle 14 is preferably made of a plastic.
  • a gas control device 11 engages with a gas outlet connection 17 in a recess of the mixing device 10 according to the invention, the gas control device 11 and the mixing device 10, namely the monolithic unit comprising the housing 13 and the venturi nozzle 14, being connected via a snap lock.

Abstract

The invention concerns a mixing device for mixing gas and combustion air for a gas burner. According to the invention, a mixture of gas and combustion air prepared in said mixing device (10) is sent to the gas burner through a blower, the mixing device (10) comprising a housing (13) and a venturi (14). The invention is characterized in that the venturi (14) is integrated in the housing (13) such that the housing (13) and the venturi (14) form a single block.

Description

Mischvorrichtung zum Mischen von Gas und Verbrennungsluft für einen Gasbrenner sowie Gasbrenner Mixing device for mixing gas and combustion air for a gas burner and gas burner
Die Erfindung betrifft eine Mischvorrichtung zum Mischen von Gas und Verbrennungsluft für einen Gasbrenner nach dem Oberbegriff des Anspruchs 1. Des weiteren betrifft die Erfindung einen Gasbrenner nach dem Oberbegriff des Anspruchs 13.The invention relates to a mixing device for mixing gas and combustion air for a gas burner according to the preamble of claim 1. Furthermore, the invention relates to a gas burner according to the preamble of claim 13.
Zum Mischen zweier gasförmiger Medien, insbesondere von Verbrennungsluft und Brenngas, für einen Brenner werden Mischvorrichtungen mit einer Venturi- Düse verwendet. So offenbart die DE 197 29 047 C1 eine Mischvorrichtung für einen Gasbrenner zur Erzeugung eines Gemisches aus Gas und Verbren- nungsluft, die ein Gehäuse sowie eine separat ausgebildete Venturi-Düse aufweist. Die Mischvorrichtung nach dem Stand der Technik ist demnach zumindest zweiteilig ausgebildet, wobei die Venturi-Düse und das Gehäuse als separate Baugruppen ausgeführt sind. Nach dem Stand der Technik ist dabei das Gehäuse der Mischvorrichtung aus einem metallischen Werkstoff und die Ven- turi-Düse aus einem Kunststoff gebildet. Gemäß der DE 19729047 C1 sind die Venturi-Düse sowie das Gehäuse der Mischvorrichtung getrennt voneinander an einer Tragplatte eines Gebläses befestigt. Durch die mehrteilige Ausführung der Mischvorrichtung erhöhen sich Montageaufwand, Produktionsaufwand sowie Fertigungskosten.Mixing devices with a Venturi nozzle are used to mix two gaseous media, in particular combustion air and fuel gas, for a burner. DE 197 29 047 C1, for example, discloses a mixing device for a gas burner for producing a mixture of gas and combustion air, which has a housing and a separately formed Venturi nozzle. The mixing device according to the prior art is therefore formed at least in two parts, the venturi nozzle and the housing being designed as separate assemblies. According to the prior art, the housing of the mixing device is formed from a metallic material and the Venturi nozzle from a plastic. According to DE 19729047 C1, the venturi nozzle and the housing of the mixing device are fastened separately from one another to a support plate of a blower. The multi-part design of the mixing device increases assembly, production and manufacturing costs.
Hiervon ausgehend liegt der vorliegenden Erfindung das Problem zu Grunde, eine neuartige Mischvorrichtung zum Mischen von Gas und Verbrennungsluft für einen Gasbrenner sowie einen neuartigen Gasbrenner zu schaffen. Dieses Problem wird durch eine Mischvorrichtung zum Mischen von Gas und Verbrennungsluft für einen Gasbrenner mit den Merkmalen des Anspruchs 1 gelöst. Erfindungsgemäß ist die Venturi-Düse derart in das Gehäuse integriert, dass das Gehäuse und die Venturi-Düse als monolithische Einheit ausgebildet sind. Die monolithische Einheit aus Gehäuse und Venturi-Düse ist vorzugsweise aus Kunststoff gebildet.Proceeding from this, the present invention is based on the problem of creating a novel mixing device for mixing gas and combustion air for a gas burner and a novel gas burner. This problem is solved by a mixing device for mixing gas and combustion air for a gas burner with the features of claim 1. According to the invention, the venturi nozzle is integrated into the housing such that the housing and the venturi nozzle are designed as a monolithic unit. The monolithic unit consisting of the housing and the venturi nozzle is preferably made of plastic.
Im Sinne der hier vorliegenden Erfindung wird vorgeschlagen, die Venturi-Düse in das Gehäuse der Mischvorrichtung derart zu integrieren, dass das Gehäuse sowie die Venturi-Düse als monolithische Einheit ausgebildet sind. Die Venturi- Düse ist demnach integraler Bestandteil des Gehäuses der Mischvorrichtung. Hierdurch wird die Anzahl der zu fertigen Baugruppen reduziert. Dies minimiert den Produktionsaufwand, Montageaufwand sowie die Fertigungskosten.In the sense of the present invention, it is proposed to integrate the Venturi nozzle into the housing of the mixing device in such a way that the housing and the Venturi nozzle are designed as a monolithic unit. The Venturi nozzle is therefore an integral part of the housing of the mixing device. This reduces the number of assemblies to be manufactured. This minimizes the production effort, assembly effort and the manufacturing costs.
Nach einer bevorzugten Weiterbildung der Erfindung ist die monolithische, aus Kunststoff gebildete Einheit aus Gehäuse und Venturi-Düse an einer metallischen Tragplatte des Gebläses über einen Bajonettverschluss befestigt ist. An der monolithischen Einheit aus Gehäuse und Venturi-Düse greift weiterhin ein Gasregelgerät an, wobei ein Gasauslassstutzen des Gasregelgeräts in eine entsprechende Ausnehmung der monolithischen Einheit einsteckbar ist. Das Gasregelgerät ist an der monolithischen Einheit aus Gehäuse und Venturi-Düse über einen Schnappverschluss befestigt.According to a preferred development of the invention, the monolithic, plastic unit consisting of the housing and the venturi nozzle is fastened to a metallic support plate of the fan by means of a bayonet catch. A gas control device continues to act on the monolithic unit comprising the housing and the venturi nozzle, a gas outlet connector of the gas control device being insertable into a corresponding recess in the monolithic unit. The gas control unit is attached to the monolithic unit consisting of the housing and the venturi nozzle via a snap lock.
Der erfindungsgemäße Gasbrenner ist in Anspruch 13 definiert.The gas burner according to the invention is defined in claim 13.
Bevorzugte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung. Nachfolgend wird ein Ausführungsbeispiel der Erfindung, ohne hierauf beschränkt zu sein, anhand der Zeichnung näher erläutert. In der Zeichnung zeigt: Fig. 1 : eine erfindungsgemäße Mischvorrichtung zum Mischen von Gas und Verbrennungsluft für einen Gasbrenner zusammen mit einem Gasregelgerät und einer Montageplatte eines Gebläses im Querschnitt; und Fig. 2: die erfindungsgemäße Mischvorrichtung zum Mischen von Gas und Verbrennungsluft für einen Gasbrenner in einer aus der Zeichenebene gemäß Fig. 1 um 90° herausgedrehten Ansicht, jedoch ohne das Gasregelgerät.Preferred developments of the invention result from the subclaims and the following description. In the following, an exemplary embodiment of the invention is explained in more detail with reference to the drawing, without being restricted to this. The drawing shows: Fig. 1: a mixing device according to the invention for mixing gas and combustion air for a gas burner together with a gas control device and a mounting plate of a blower in cross section; and FIG. 2: the mixing device according to the invention for mixing gas and combustion air for a gas burner in a view turned out from the drawing plane according to FIG. 1 by 90 °, but without the gas control device.
Nachfolgend wird die hier vorliegende Erfindung unter Bezugnahme auf Fig. 1 und 2 in größerem Detail beschrieben.The present invention is described in greater detail below with reference to FIGS. 1 and 2.
Fig. 1 zeigt eine erfindungsgemäße Mischvorrichtung 10 im Querschnitt, wobei in Fig. 1 neben der erfindungsgemäßen Mischvorrichtung 10 weiterhin ein Gas- regelgerät 11 und eine Tragplatte 12 eines Gebläses dargestellt sind. Im Sinne der hier vorliegenden Erfindung sind ein Gehäuse sowie eine Venturi-Düse der Mischvorrichtung 10 als integrale und damit monolithische Einheit ausgebildet. Das Gehäuse der Mischvorrichtung 10 ist in Fig. 1 durch eine Bezugsziffer 13, die Venturi-Düse durch eine Bezugsziffer 14 visualisiert.1 shows a cross section of a mixing device 10 according to the invention, a gas control device 11 and a support plate 12 of a blower being shown in FIG. 1 in addition to the mixing device 10 according to the invention. In the sense of the present invention, a housing and a venturi nozzle of the mixing device 10 are designed as an integral and thus monolithic unit. The housing of the mixing device 10 is visualized in FIG. 1 by a reference number 13, the venturi nozzle by a reference number 14.
Die monolithische Einheit aus Gehäuse 13 und Venturi-Düse 14 bildet einen Strömungskanal für Gas- und Verbrennungsluft. An einer Einlassöffnung 15 dieses Strömungskanals ist Verbrennungsluft ansaugbar. An einer gegenüberliegenden Auslassöffnung 16 des Strömungskanals greift das Gebläse mit der Tragplatte 17 an und stellt einen Ansaugdruck bereit, um an der Auslassöffnung 16 das Gemisch aus Gas und Verbrennungsluft anzusaugen.The monolithic unit consisting of housing 13 and venturi nozzle 14 forms a flow channel for gas and combustion air. Combustion air can be sucked in at an inlet opening 15 of this flow channel. At an opposite outlet opening 16 of the flow channel, the blower engages with the support plate 17 and provides a suction pressure in order to suck in the mixture of gas and combustion air at the outlet opening 16.
In das Gehäuse 13 der Mischvorrichtung 10 ist in einen Abschnitt zwischen der Einlassöffnung 15 sowie der Auslassöffnung 16 eine Ausnehmung eingebracht, in welche ein Gasauslassstutzen 17 des Gasregelgeräts 11 eingreift. Diese Ausnehmung wird durch einen Gasführungskanal 18 verlängert, der in den sich zwischen der Einlassöffnung 15 und der Auslassöffnung 16 erstreckenden Strömungskanal mündet und so das Brenngas durch eine radial in den Strömungskanal mündende Öffnung einleitet.A recess is made in the housing 13 of the mixing device 10 in a section between the inlet opening 15 and the outlet opening 16, into which a gas outlet connection 17 of the gas control device 11 engages. This recess is extended by a gas routing channel 18 which extends into the one that extends between the inlet opening 15 and the outlet opening 16 Flow channel opens and thus introduces the fuel gas through an opening opening radially into the flow channel.
Im Sinne der hier vorliegenden Erfindung ist die monolithische Einheit aus Ge- häuse 13 und Venturi-Düse 14 aus einem Kunststoff gebildet. Die aus Kunststoff gebildete, monolithische Einheit aus Gehäuse 13 und Venturi-Düse 14 ist an der metallischen Tragplatte 12 des Gebläses befestigt, und zwar im Sinne der hier vorliegenden Erfindung über einen als Bajonettverschluss 19 ausgebildeten Schnellverschluss. Hierzu sind, wie der Fig. 2 entnommen werden kann, in die Tragplatte 12 Ausnehmungen 20 eingebracht, in welche korrespondierend ausgestaltete Vorsprünge bzw. Nocken 21 des Gehäuses 13 der Mischvorrichtung 10 einführbar sind. Die Vorsprünge 21 sind dabei dem auslassseiti- gen Ende der monolithischen Einheit aus Gehäuse 13 und Venturi-Düse 14 zugeordnet. Nach dem Einführen der Vorsprünge 21 in die Ausnehmungen 20 der Tragplatte 12 sowie nach einer Relativdrehung zwischen der monolithischen Einheit und der Tragplatte 12 sichern die Vorsprünge 21 die Mischvorrichtung 10 in ihrer Position an der Tragplatte 12 des Gebläses. Der Bajonettverschluss 19 dient demnach dem schnellen, lösbaren Befestigen der Mischvorrichtung 10 an der Tragplatte 12 des Gebläses. Die Befestigung kann ohne zusätzliche Hilfsmittel erfolgen. Die Verbindung zwischen Mischvorrichtung 10 und Gebläse ist demnach reversibel und kann wieder gelöst werden.For the purposes of the present invention, the monolithic unit comprising the housing 13 and the venturi nozzle 14 is formed from a plastic. The monolithic unit made of plastic, consisting of housing 13 and venturi nozzle 14, is fastened to the metallic support plate 12 of the blower, specifically in the sense of the present invention via a quick-release fastener designed as a bayonet fastener 19. For this purpose, as can be seen in FIG. 2, recesses 20 are made in the support plate 12, into which correspondingly designed projections or cams 21 of the housing 13 of the mixing device 10 can be inserted. The projections 21 are assigned to the outlet-side end of the monolithic unit comprising the housing 13 and the venturi nozzle 14. After insertion of the projections 21 into the recesses 20 of the support plate 12 and after a relative rotation between the monolithic unit and the support plate 12, the projections 21 secure the mixing device 10 in its position on the support plate 12 of the fan. The bayonet lock 19 is therefore used for the quick, detachable fastening of the mixing device 10 to the support plate 12 of the fan. The attachment can be done without additional aids. The connection between the mixing device 10 and the fan is therefore reversible and can be released again.
Wie Fig. 1 entnommen werden kann, wird die Einschiebtiefe des auslassseiti- gen Endes der monolithischen Einheit aus Gehäuse 13 und Venturi-Düse 14 in die Tragplatte 12 des Gebläses durch einen Anschlag 22 begrenzt. Der Anschlag 22 ist ebenso wie die Vorsprünge 21 dem auslassseitigen Ende des Gehäuse 13 zugeordnet.As can be seen in FIG. 1, the depth of insertion of the outlet-side end of the monolithic unit consisting of housing 13 and venturi nozzle 14 into the support plate 12 of the fan is limited by a stop 22. The stop 22, like the projections 21, is assigned to the outlet-side end of the housing 13.
Wie Fig. 1 weiterhin entnommen werden kann, wird die Befestigung der mono- lithischen Einheit aus dem Gehäuse 13 und der Venturi-Düse 14 an der Tragplatte 12 des Gebläses durch eine Dichteinrichtung 23 abgedichtet. Die Dichteinrichtung 23 ist als sogenannter O-Ring ausgeführt und gewährleistet die Dichtheit der Verbindung auch über ein längere Betriebszeit, innerhalb derer sich Materialveränderung oder Deformationen der aus Kunststoff hergestellten Mischvorrichtung 10 einstellen können.As can also be seen in FIG. 1, the fastening of the monolithic unit consisting of the housing 13 and the venturi nozzle 14 to the support plate 12 of the fan is sealed by a sealing device 23. The sealing device 23 is designed as a so-called O-ring and ensures that Tightness of the connection also over a longer operating time, within which material changes or deformations of the mixing device 10 made of plastic can occur.
Das Gasregelgerät 11 ist ebenfalls über einen Schnellverschluss an der monolithischen Einheit aus Gehäuse 13 und Venturi-Düse 14 befestigt. Wie bereits erwähnt, greift zur Befestigung des Gasregelgeräts 11 an der monolithischen Einheit das Gasregelgerät 11 mit dem Gasauslassstutzen 17 in die entsprechende Ausnehmung innerhalb der monolithischen Einheit ein. Nach dem Ein- führen bzw. Einstecken des Gasauslassstutzens 17 in diese Ausnehmung umgreift ein der monolithischen Einheit zugeordneter Sicherungsbügel 24 im Sinne eines Schnappverschlusses zumindest abschnittsweise den Gasauslassstutzen 17. Auch die Verbindung des Gasregelgeräts 11 mit der monolithischen Einheit aus Gehäuse 13 und Venturi-Düse 14 kann demnach ohne Hilfsmittel erfolgen. Durch Zurückziehen bzw. Herausziehen des Sicherungsbügels 24 ist die Verbindung von Gasregelgerät 11 und monolithischer Einheit lösbar und das Gasregelgerät 11 ist von der monolithischen Einheit aus Gehäuse 13 und Venturi- Düse 14 trennbar bzw. aus derselben herausziehbar.The gas control device 11 is also fastened to the monolithic unit comprising the housing 13 and the venturi nozzle 14 by means of a quick-release fastener. As already mentioned, for fastening the gas control device 11 to the monolithic unit, the gas control device 11 engages with the gas outlet stub 17 in the corresponding recess within the monolithic unit. After the gas outlet connector 17 has been inserted or inserted into this recess, a securing bracket 24 assigned to the monolithic unit engages around the gas outlet connector 17 at least in sections in the sense of a snap closure can therefore be done without tools. By pulling back or pulling out the safety bracket 24, the connection of the gas control device 11 and the monolithic unit can be released and the gas control device 11 can be separated from the monolithic unit from the housing 13 and the Venturi nozzle 14 or can be pulled out of the same.
Auch die Befestigung des Gasregelgeräts 11 über den Gasauslassstutzen 17 an der monolithischen Einheit aus Gehäuse 13 sowie Venturi-Düse 14 ist über eine Dichteinrichtung 25 abgedichtet. Auch diese Dichteinrichtung 25 ist als sogenannter O-Ring ausgeführt und sorgt für eine dauerhafte Abdichtung der lösbaren Verbindung zwischen Gasregelgerät 11 und Mischvorrichtung 10.The fastening of the gas control device 11 via the gas outlet connector 17 to the monolithic unit comprising the housing 13 and the venturi nozzle 14 is also sealed by means of a sealing device 25. This sealing device 25 is also designed as a so-called O-ring and ensures permanent sealing of the detachable connection between the gas control device 11 and the mixing device 10.
Wie Fig. 1 entnommen werden kann, ist im Bereich des Gasauslassstutzens 17 eine Gasdüse 26 positioniert. Die Gasdüse 26 ist als separates Bauteil ausgeführt und ragt in dem Gasauslassstutzen 17 hinein.As can be seen in FIG. 1, a gas nozzle 26 is positioned in the area of the gas outlet connection 17. The gas nozzle 26 is designed as a separate component and projects into the gas outlet connection 17.
Im Sinne der hier vorliegenden Erfindung wird demnach eine Mischvorrichtung für einen Gasbrenner vorgeschlagen, bei der die Venturi-Düse 14 integraler Bestandteil des Gehäuses 13 ist. Die monolithische Einheit aus Gehäuse 13 und Venturi-Düse 14 ist dabei vorzugsweise aus einem Kunststoff hergestellt. Weiterhin liegt es im Sinne der hier vorliegenden Erfindung, die so ausgebildete Mischvorrichtung 10 über einen Bajonettverschluss an einer metallischen Tragplatte 12 eines Gebläses zu befestigen. Ein Gasregelgerät 11 greift mit einem Gasauslassstutzen 17 in eine Ausnehmung der erfindungsgemäßen Mischvorrichtung 10 ein, wobei die Verbindung von Gasregelgerät 11 und Mischvorrichtung 10, nämlicher monolithischer Einheit aus Gehäuse 13 sowie Venturi-Düse 14, über einen Schnappverschluss erfolgt. According to the present invention, a mixing device for a gas burner is therefore proposed, in which the venturi nozzle 14 is an integral part of the housing 13. The monolithic unit from housing 13 and Venturi nozzle 14 is preferably made of a plastic. Furthermore, it is within the scope of the present invention to fasten the mixing device 10 designed in this way to a metallic support plate 12 of a blower by means of a bayonet catch. A gas control device 11 engages with a gas outlet connection 17 in a recess of the mixing device 10 according to the invention, the gas control device 11 and the mixing device 10, namely the monolithic unit comprising the housing 13 and the venturi nozzle 14, being connected via a snap lock.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
Mischvorrichtungmixing device
GasregelgerätGas Regulator
Tragplattesupport plate
Gehäusecasing
Venturi-DüseVenturi nozzle
Einlassöffnunginlet port
Auslassöffnungoutlet
GasausiassstutzenGasausiassstutzen
GasführungskanalGas duct
Bajonettverschlussbayonet catch
Ausnehmungrecess
Vorsprunghead Start
Anschlagattack
Dichteinrichtungsealing device
Sicherungsbügelsafety catch
Dichteinrichtungsealing device
Gasdüse gas nozzle

Claims

Ansprüche Expectations
1. Mischvorrichtung zum Mischen von Gas und Verbrennungsluft für einen Gasbrenner, wobei dem Gasbrenner ein von der Mischvorrichtung (10) bereitgestelltes Gemisch aus Gas und Verbrennungsluft über ein Gebläse zuführbar ist, mit einem Gehäuse (13) und einer Venturi-Düse (14), dadurch gekennzeichnet, dass die Venturi-Düse (14) derart in das Gehäuse (13) integriert ist, dass das Gehäuse (13) und die Venturi-Düse (14) als monolithische Einheit ausgebildet sind.1. Mixing device for mixing gas and combustion air for a gas burner, the gas burner being able to be supplied with a mixture of gas and combustion air provided by the mixing device (10) via a blower, with a housing (13) and a venturi nozzle (14), characterized in that the venturi nozzle (14) is integrated into the housing (13) such that the housing (13) and the venturi nozzle (14) are designed as a monolithic unit.
2. Mischvorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die monolithische Einheit aus Gehäuse (13) und Venturi-Düse (14) aus Kunststoff gebildet ist.2. Mixing device according to claim 1, characterized in that the monolithic unit from the housing (13) and Venturi nozzle (14) is formed from plastic.
3. Misch Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die monolithische Einheit aus Gehäuse (13) und Venturi-Düse (14) einen Strömungskanal für Gas und Verbrennungsluft bildet, wobei an einer Einlassöffnung (15) desselben Verbrennungsluft ansaugbar ist, wo- bei an einer Auslassöffnung (16) desselben das Gebläse angreift, und wobei das Gebläse einen Ansaugdruck bereitstellt, um an der Auslassöffnung (15) das Gemisch aus Gas und Verbrennungsluft anzusaugen.3. Mixing device according to claim 1 or 2, characterized in that the monolithic unit from the housing (13) and Venturi nozzle (14) forms a flow channel for gas and combustion air, wherein the same combustion air can be sucked in at an inlet opening (15), where - When the blower engages at an outlet opening (16), and the blower provides a suction pressure in order to suck in the mixture of gas and combustion air at the outlet opening (15).
4. Mischvorrichtung nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die monolithische, aus Kunststoff gebildete Einheit aus Gehäuse (13) und Venturi-Düse (14) an einer metallischen Tragplatte (12) des Gebläses befestigt ist.4. Mixing device according to claim 2 or 3, characterized in that the monolithic, plastic unit made of housing (13) and venturi nozzle (14) is attached to a metallic support plate (12) of the blower.
5. Mischvorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die monolithische Einheit aus Gehäuse (13) und Venturi-Düse (14) an der Tragplatte (12) über einen Schnellverschluss befestigt ist. 5. Mixing device according to claim 4, characterized in that the monolithic unit comprising the housing (13) and venturi nozzle (14) is fastened to the support plate (12) by means of a quick-release fastener.
6. Mischvorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass der Schnellverschluss als Bajonettverschluss (19) ausgebildet ist, wobei einem auslassseitigem Ende der monolithischen Einheit Vorsprünge (21) zugeordnet sind, die in entsprechende Ausnehmungen (20) innerhalb der Tragplatte (12) des Gebläses einführbar sind, und die nach einer Relativdrehung zwischen der monolithischen Einheit und der Tragplatte (12) die monolithischen Einheit an der Tragplatte (12) des Gebläses lösbar befestigen.6. Mixing device according to claim 5, characterized in that the quick-release fastener is designed as a bayonet fastener (19), with projections (21) being associated with an outlet-side end of the monolithic unit, which protrusions (20) within the support plate (12) of the blower are insertable, and after a relative rotation between the monolithic unit and the support plate (12) releasably attach the monolithic unit to the support plate (12) of the blower.
7. Mischvorrichtung nach einem oder mehreren der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass die Befestigung der monolithischen Einheit an der metallischen Tragplatte (12) des Gebläses über eine Dichteinrichtung (23) abgedichtet ist.7. Mixing device according to one or more of claims 4 to 6, characterized in that the attachment of the monolithic unit to the metallic support plate (12) of the blower is sealed by a sealing device (23).
8. Mischvorrichtung nach einem oder mehreren der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass an der monolithischen Einheit aus Gehäuse (13) und Venturi-Düse (14) ein Gasregelgerät (11) angreift, wobei ein Gasausiassstutzen (17) des Gasregelgeräts (11) in eine entsprechende Ausnehmung der monolithischen Einheit einsteckbar ist.8. Mixing device according to one or more of claims 1 to 7, characterized in that a gas control device (11) acts on the monolithic unit comprising the housing (13) and the venturi nozzle (14), a gas outlet connection (17) of the gas control device (11 ) can be inserted into a corresponding recess in the monolithic unit.
9. Mischvorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass das Gasregelgerät (11) an der monolithischen Einheit aus Gehäuse (13) und Venturi-Düse (14) über einen Schnellverschluss befestigt ist.9. Mixing device according to claim 8, characterized in that the gas control device (11) on the monolithic unit from the housing (13) and Venturi nozzle (14) is attached via a quick release.
10. Mischvorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass der Schnellverschluss als Schnappverschluss ausgebildet ist, wobei ein der monolithischen Einheit zugeordneter Sicherungsbügel (24) den Gasausiassstutzen (17) nach dem Einstecken desselben in die Ausnehmung zumindest abschnittsweise umgreift, um das Gasregelgerät (11) an der monolithischen Einheit lösbar zu befestigen. 10. Mixing device according to claim 9, characterized in that the quick-release fastener is designed as a snap fastener, with a securing bracket (24) assigned to the monolithic unit engaging around the gas outlet connector (17) after inserting it into the recess at least in sections, around the gas control device (11). attachable to the monolithic unit.
11. Mischvorrichtung nach einem oder mehreren der Ansprüche 8 bis 10, dadurch gekennzeichnet, dass die Befestigung des Gasregelgeräts (11) an der monolithischen Einheit über eine Dichteinrichtung (25) abgedichtet ist.11. Mixing device according to one or more of claims 8 to 10, characterized in that the fastening of the gas control device (11) to the monolithic unit is sealed by a sealing device (25).
12. Mischvorrichtung nach einem oder mehreren der Ansprüche 8 bis 11, dadurch gekennzeichnet, dass die Ausnehmung der monolithischen Einheit, an welcher das Gasregelgerät (11) angreift, zwischen der Einlassöffnung (15) und der Auslassöffnung (16) des von der monolithischen Einheit gebildeten Strömungskanals angeordnet ist.12. Mixing device according to one or more of claims 8 to 11, characterized in that the recess of the monolithic unit, to which the gas control device (11) engages, between the inlet opening (15) and the outlet opening (16) of that formed by the monolithic unit Flow channel is arranged.
13. Gasbrenner, mit einer Brennkammer, wobei der Brennkammer ein Gemisch aus Gas und Verbrennungsluft über eine Gebläse zuführbar ist, und wobei das Gebläse an einer Mischvorrichtung (10) zum Mischen von Gas und Verbrennungsluft angreift, das von der Mischvorrichtung (10) bereitgestelltes Gemisch ansaugt und der Brennkammer zuführt, dadurch gekennzeichnet, dass die Mischvorrichtung (10) nach einem o- der mehreren der Ansprüche 1 bis 12 ausgebildet ist. 13. Gas burner, with a combustion chamber, the combustion chamber being able to be supplied with a mixture of gas and combustion air via a blower, and wherein the blower acts on a mixing device (10) for mixing gas and combustion air, the mixture provided by the mixing device (10) sucks in and feeds to the combustion chamber, characterized in that the mixing device (10) is designed according to one or more of claims 1 to 12.
EP05707196.1A 2004-02-12 2005-02-04 Mixing device for mixing gas and combustion air for a gas burner and gas burner Active EP1714079B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004007123A DE102004007123B3 (en) 2004-02-12 2004-02-12 Mixing device for mixing gas and combustion air for a gas burner comprises a gas regulating unit arranged on a monolithic unit consisting of a housing and a Venturi nozzle
PCT/EP2005/001125 WO2005078343A1 (en) 2004-02-12 2005-02-04 Mixing device for mixing gas and combustion air for a gas burner and gas burner

Publications (2)

Publication Number Publication Date
EP1714079A1 true EP1714079A1 (en) 2006-10-25
EP1714079B1 EP1714079B1 (en) 2015-07-29

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EP05707196.1A Active EP1714079B1 (en) 2004-02-12 2005-02-04 Mixing device for mixing gas and combustion air for a gas burner and gas burner

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US (1) US20070243496A1 (en)
EP (1) EP1714079B1 (en)
DE (1) DE102004007123B3 (en)
WO (1) WO2005078343A1 (en)

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Also Published As

Publication number Publication date
EP1714079B1 (en) 2015-07-29
DE102004007123B3 (en) 2005-08-18
US20070243496A1 (en) 2007-10-18
WO2005078343A1 (en) 2005-08-25

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