EP3722670B1 - Adapter device adapted to be mounted on an intake opening of a gas blower - Google Patents

Adapter device adapted to be mounted on an intake opening of a gas blower Download PDF

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Publication number
EP3722670B1
EP3722670B1 EP20158416.6A EP20158416A EP3722670B1 EP 3722670 B1 EP3722670 B1 EP 3722670B1 EP 20158416 A EP20158416 A EP 20158416A EP 3722670 B1 EP3722670 B1 EP 3722670B1
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EP
European Patent Office
Prior art keywords
adapter device
outer housing
outlet
tube section
gas
Prior art date
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EP20158416.6A
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German (de)
French (fr)
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EP3722670A1 (en
Inventor
Jan Kopper
Michael Boiger
Manuel HÄGLSPERGER
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Ebm Papst Landshut GmbH
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Ebm Papst Landshut GmbH
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Publication of EP3722670A1 publication Critical patent/EP3722670A1/en
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Classifications

    • 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
    • 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
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00—Feeding or distributing other fuel to combustion apparatus
    • F23K5/002—Gaseous fuel
    • F23K5/007—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2400/00—Pretreatment and supply of gaseous fuel
    • F23K2400/20—Supply line arrangements

Definitions

  • the invention relates to an adapter device designed for a fixed arrangement on a suction opening of a gas blower and designed for the supply of fuel gas and air to the gas blower.
  • Generic adapter devices are already known in the art. These serve as a mixing device for fuel gas and air and are attached to the suction opening of the gas blower.
  • the fuel gas feed is fixed to the housing of the mixing device.
  • the currently used mixing devices are assembled from several individual parts comprising a housing and pipe inserts, with an annular gap being provided in the mixing device between the flow path for the air and the flow path for the fuel gas, so that the fuel gas and the air mix and together in the mixing device be fed to the gas blower. Due to the multi-part structure with pipe inserts for designing the flow paths for the air and the fuel gas, seals must always be used to ensure that the fuel gas flows exclusively in the predetermined gas flow path.
  • the invention is therefore based on the object of providing an adapter device which can dispense with sealing the flow paths between fuel gas and air by means of additional seals and the number of parts for connection to a gas fan is reduced.
  • an adapter device designed to be attached to a suction opening of a gas blower and designed for the supply of fuel gas and air to the gas blower
  • one outer housing and one extending from the outer housing in one piece in the axial direction through the outer housing to an outlet of the adapter device Includes pipe section.
  • the pipe section and the outer housing define two separate coaxial flow channels through the adapter device, the coaxial flow channels being brought together in the region of the outlet of the adapter device.
  • One of the flow channels has an air inlet, the other of the flow channels has a fuel gas inlet.
  • the pipe section in the area of the outlet of the adapter device protrudes over an axial end edge of the outer housing in the axial flow direction in order to protrude into the suction opening of the gas blower when the adapter device is mounted on the gas blower.
  • the adapter device can be mounted on the gas blower more quickly.
  • the solution according to the invention that the mixture of fuel gas and air does not have to be carried out inside the adapter device, rather the pipe section separating the coaxial flow channels is lengthened in the direction of flow so that it protrudes beyond the axial end edge of the outer housing and thus the mixture of fuel gas and air takes place at the suction opening.
  • the number of parts of the pipe inserts for creating the annular gap is also reduced.
  • this solution reduces the pressure loss and consequently increases the throughput and the heat output that can be achieved as a result of a heater connected to the gas fan.
  • a preferred embodiment provides that the adapter device is designed in one piece as a whole.
  • production from plastic by injection molding in which the outer housing and the pipe section are designed without undercuts, is suitable.
  • Another preferred embodiment provides aluminum materials that can be mapped, for example, using manufacturing processes based on the die-casting concept.
  • the pipe section defines the air inlet and the outer housing defines the fuel gas inlet, so that the flow channel running inside the pipe section allows air to flow through and the flow channel running coaxially between the outer housing and the pipe section allows fuel gas to flow through are trained.
  • the fuel gas inlet is preferably arranged on an outer jacket surface of the outer housing and forms a connection pipe in one piece on the outer housing for fastening the fuel gas connection.
  • the pipe section extends uninterruptedly from the air inlet to the outlet of the adapter device.
  • the pipe section is preferably designed to be rotationally symmetrical and guides the suctioned Air over the entire axial flow length through the adapter device from the air inlet to the outlet. There is no fuel gas supply into the flow channel of the air flow within the adapter device. Mixing only takes place after the air emerges from the pipe section at the outlet.
  • a further development of the adapter device is characterized in that the pipe section is designed to taper conically from the air inlet to the outlet, so that an axial flow cross-sectional area of the flow channel located within the pipe section is reduced towards the outlet. It is further preferred that the flow cross-sectional area of the pipe section decreases steadily in the axial flow path from the air inlet to the outlet and is smallest at the outlet. The air that is sucked in and flowing through the pipe section is thus accelerated by the adapter device and generates a negative pressure at the outlet which can be used to suck the fuel gas out of the flow channel for the fuel gas that coaxially surrounds the pipe section.
  • the fuel gas is drawn in indirectly via the negative pressure described and also directly by the gas blower.
  • the negative pressure can be determined via the flow cross-sectional area of the pipe section at the outlet.
  • the outer housing has, viewed in the axial flow direction, an inner diameter that increases towards the outlet, so that an axial flow cross-sectional area of the flow channel for the fuel gas between the pipe section and the outer housing increases towards the outlet. It is particularly advantageous if the flow cross-sectional area of the flow channel for the fuel gas, located between the pipe section and the outer housing, increases steadily towards the outlet. As far as the pipe section at the same time in the flow cross-section to the outlet is reduced in size, the outer housing and the pipe section diverge in the radial direction along their axial flow direction.
  • the adapter device is mounted on the gas blower.
  • a preferred embodiment of the adapter device therefore provides that fastening means for fastening it to the gas blower are provided on the axial end edge of the outer housing.
  • a flange can also be formed on the axial end edge, via which the adapter device is screwed to the gas blower.
  • the fastening means interacting in each case on the gas blower and the adapter device are arranged in the circumferential direction relative to one another in such a way that the adapter device can be mounted on the gas blower in various rotational positions.
  • the gas connection can thus be aligned in different circumferential directions and the adapter device is suitable for different installation positions.
  • a further development of the adapter device is also characterized in that an opening is provided on an outer jacket surface of the outer housing, which creates a pressure connection to the flow channel between the outer housing and the pipe section.
  • a pin projecting from the outer jacket surface of the outer housing is preferably formed at the opening, onto which a hose, for example, can be plugged for taking pressure off and checking the pressure in the flow channel of the fuel gas.
  • the invention further comprises a gas blower with a blower housing, a motor and a blower wheel, wherein the blower housing has a suction opening and a blow-out opening and the adapter device described above can be attached to the suction opening with the outer housing in such a way that the pipe section protrudes into the suction opening of the gas blower.
  • the fuel gas is combined with the air in the area of the suction opening of the gas blower, so that the components determining the suction opening of the gas blower are also used to design a nozzle which forms an inlet gap for the fuel gas.
  • a further education provides here that an inlet nozzle is additionally provided on the suction opening itself, which together with an outer jacket surface of the pipe section forms the inflow gap for the fuel gas in the area of the suction opening.
  • the inlet nozzle reduces the cross-sectional area through which the flow can flow in the area of the suction opening.
  • the adapter device is attached with its axial end edge of the outer housing to the gas blower or the inlet nozzle of the gas blower so that the protruding pipe section and the inlet nozzle run in an axial plane. The mixture of fuel gas and sucked-in air takes place when it enters the suction opening.
  • the gas blower is further characterized in that a carrier plate is fastened to the adapter device for the fastening holding of at least one gas valve, so that the at least one gas valve can be fixed to the adapter device and thus to the gas blower via the carrier plate.
  • a carrier plate is fastened to the adapter device for the fastening holding of at least one gas valve, so that the at least one gas valve can be fixed to the adapter device and thus to the gas blower via the carrier plate.
  • the Figures 1-3 show an embodiment of the one-piece adapter device 1 with the outer housing 2, which has the axial air inlet 8 and the radial fuel gas inlet 9 by means of the connector 3.
  • the two media air and fuel gas flow through the continuous, uninterrupted pipe section 4 in the coaxial flow channels 6, 7, separated by the entire adapter device 1, before they are brought together in the area of the outlet 5 of the adapter device 1.
  • the flow channel 7 for the fuel gas is shorter and ends at the axial end edge 10 of the outer housing, which is formed by the flange plate 19.
  • the merging of the flows of fuel gas and air takes place in the area of the suction opening, ie at the outlet of the adapter device 1.
  • the pipe section 4 of the area of the air inlet 8 to the outlet 5 of the adapter device 1 is designed to taper conically, so that the axial flow cross-sectional area of the flow channel 6 located within the pipe section 4 is reduced towards the outlet 5.
  • the flow channel 6 forms a step 20, after which the flow cross-sectional area of the flow channel 6 located within the pipe section 4 continues to decrease towards the outlet 5.
  • the flow cross-sectional area of the pipe section 4 is the smallest.
  • the flow channel 7 between the pipe section 4 and the outer housing 2 is constructed in exactly the opposite way, namely in such a way that the inner diameter of the outer housing 2 increases steadily towards the outlet 5 as viewed in the axial flow direction SR.
  • the flow cross-sectional area of the flow channel 7 located between the pipe section 4 and the outer housing 2 increases towards the outlet 5, both due to the widening shape of the outer housing 2 and the conically tapering shape of the pipe section 4.
  • the adapter device 1 as a whole is manufactured in one piece from plastic by injection molding and has no undercuts.
  • FIG. 3 and 4 shows a detailed view Z the opening 11 on the outer jacket surface of the outer housing 2.
  • the protruding pin 12 is integrally formed on the jacket surface and is in flow connection with the opening 11, so that a direct connection to the flow channel 7 between the pipe section 4 and the outer housing 2 is guaranteed.
  • a hose for example, via which the pressure in the flow channel 7 is tapped, can be plugged onto the pin 12.
  • FIG. 5 shows the adapter device 1, which is mounted on the gas blower 50 by means of screws via the flange plate 19.
  • the gas blower 50 includes the motor 52 which drives the blower wheel 53 positioned in the blower housing 51. About the rotation of the fan wheel 53 are through the Suction opening 54, fuel gas and air are sucked in from the adapter device 1 and mixed in the area of the suction opening 54.
  • the gas supply 90 is connected in the nozzle 3 of the adapter device 1.
  • the inlet nozzle 56 is installed in the suction opening 54 of the fan housing 51, which reduces the flow cross-section towards the fan wheel 53 and, together with the outer surface of the pipe section 4 in the area of the suction opening 54, forms the inflow gap 57 for the fuel gas.
  • the inlet nozzle 56 rests directly on the axial end face 10 of the adapter device 1 and reduces the flow cross-sectional area following the outer flow channel 7 parallel to the protruding section 14 of the pipe section 4.
  • the protruding section 14 of the pipe section 4 protrudes into the suction opening 54 and is involved the inlet nozzle 57 together in order to ensure, in addition to the suction via the fan wheel 53, a negative pressure for the defined supply of the fuel gas via the inflow gap 57.
  • Figure 6 shows in a perspective view the compact structure of the gas blower 50 with the adapter device 1 attached to the suction opening 54.
  • the carrier plate 60 can also be oriented vertically or can be supplemented by a further plate which is connected to the flange plate 19 and is fastened to the fan housing 51.
  • Two gas valves 61 are shown by way of example, but the number can be adapted to the desired application.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Jet Pumps And Other Pumps (AREA)

Description

Die Erfindung betrifft eine Adaptervorrichtung ausgeführt zur befestigten Anordnung an einer Ansaugöffnung eines Gasgebläses und ausgebildet für die Zuführung von Brenngas und Luft an das Gasgebläse.The invention relates to an adapter device designed for a fixed arrangement on a suction opening of a gas blower and designed for the supply of fuel gas and air to the gas blower.

Gattungsbildende Adaptervorrichtungen sind in der Technik bereits bekannt. Diese dienen als Mischvorrichtung für Brenngas und Luft und werden an der Ansaugöffnung des Gasgebläses befestigt. An dem Gehäuse der Mischvorrichtung wird die Brenngaszuführung fixiert. Die derzeit verwendeten Mischvorrichtungen sind aus mehreren Einzelteilen umfassend ein Gehäuse und Rohreinsätze montiert, wobei in der Mischvorrichtung zwischen dem Strömungsweg für die Luft und dem Strömungsweg für das Brenngas ein Ringspalt vorgesehen ist, so dass sich das Brenngas und die Luft in der Mischvorrichtung vermischen und zusammen dem Gasgebläse zugeführt werden. Aufgrund des mehrteiligen Aufbaus mit Rohreinsätzen zur Gestaltung der Strömungswege für die Luft und das Brenngas muss stets über Dichtungen sichergestellt werden, dass das Brenngas ausschließlich in dem vorbestimmten Gasströmungsweg strömt.Generic adapter devices are already known in the art. These serve as a mixing device for fuel gas and air and are attached to the suction opening of the gas blower. The fuel gas feed is fixed to the housing of the mixing device. The currently used mixing devices are assembled from several individual parts comprising a housing and pipe inserts, with an annular gap being provided in the mixing device between the flow path for the air and the flow path for the fuel gas, so that the fuel gas and the air mix and together in the mixing device be fed to the gas blower. Due to the multi-part structure with pipe inserts for designing the flow paths for the air and the fuel gas, seals must always be used to ensure that the fuel gas flows exclusively in the predetermined gas flow path.

Druckschriftlicher Stand der Technik im vorliegenden technischen Gebiet ist aus den Dokumenten EP 3 064 778 A1 und EP 0 890 787 A2 bekannt.The prior art in the present technical field can be found in the documents EP 3 064 778 A1 and EP 0 890 787 A2 known.

Der Erfindung liegt deshalb die Aufgabe zugrunde, eine Adaptervorrichtung bereit zu stellen, die auf eine Abdichtung der Strömungswege zwischen Brenngas und Luft mittels zusätzlicher Dichtungen verzichten kann und deren Teilezahl zur Anbindung an ein Gasgebläse reduziert ist.The invention is therefore based on the object of providing an adapter device which can dispense with sealing the flow paths between fuel gas and air by means of additional seals and the number of parts for connection to a gas fan is reduced.

Diese Aufgabe wird durch die Merkmalskombination gemäß Patentanspruch 1 gelöst.This object is achieved by the combination of features according to claim 1.

Erfindungsgemäß wird eine Adaptervorrichtung ausgeführt zur befestigten Anordnung an einer Ansaugöffnung eines Gasgebläses und ausgebildet für die Zuführung von Brenngas und Luft an das Gasgebläse vorgeschlagen, die ein Außengehäuse und einen sich von dem Außengehäuse einstückig in axialer Richtung durch das Außengehäuse bis zu einem Auslass der Adaptervorrichtung erstreckenden Rohrabschnitt umfasst. Der Rohrabschnitt bestimmt mit dem Außengehäuse zwei getrennte koaxiale Strömungskanäle durch die Adaptervorrichtung, wobei die koaxialen Strömungskanäle im Bereich des Auslasses der Adaptervorrichtung zusammengeführt sind. Einer der Strömungskanäle weist einen Lufteinlass, der andere der Strömungskanäle einen Brenngaseinlass auf. Der Rohrabschnitt im Bereich des Auslasses der Adaptervorrichtung steht über eine axiale Stirnkante des Außengehäuses in axialer Strömungsrichtung hervor, um im montierten Zustand der Adaptervorrichtung an dem Gasgebläse in die Ansaugöffnung des Gasgebläses hineinzuragen.According to the invention, an adapter device designed to be attached to a suction opening of a gas blower and designed for the supply of fuel gas and air to the gas blower is proposed, which one outer housing and one extending from the outer housing in one piece in the axial direction through the outer housing to an outlet of the adapter device Includes pipe section. The pipe section and the outer housing define two separate coaxial flow channels through the adapter device, the coaxial flow channels being brought together in the region of the outlet of the adapter device. One of the flow channels has an air inlet, the other of the flow channels has a fuel gas inlet. The pipe section in the area of the outlet of the adapter device protrudes over an axial end edge of the outer housing in the axial flow direction in order to protrude into the suction opening of the gas blower when the adapter device is mounted on the gas blower.

Durch die einstückige Verbindung und Ausbildung des Außengehäuses mit dem Rohrabschnitt ist eine Dichtung zwischen den beiden Bauteilen sowohl im Bereich des Einlasses von Luft und Brenngas als auch im Bereich des Auslasses der Adaptervorrichtung obsolet. Dabei ist neben der Reduzierung der Teilezahl zudem vorteilhaft, dass Fehlmontagen von sonst benötigen Dichtungen ausgeschlossen sind. Zudem ist die Montage der Adaptervorrichtung an dem Gasgebläse schneller durchführbar. Gleichzeitig kann mit der erfindungsgemäßen Lösung erreicht werden, dass die Mischung von Brenngas und Luft nicht innerhalb der Adaptervorrichtung durchgeführt werden muss, vielmehr wird der die koaxialen Strömungskanäle trennende Rohrabschnitt in Strömungsrichtung verlängert, so dass er über die axiale Stirnkante des Außengehäuses hinausragt und mithin die Mischung von Brenngas und Luft an der Ansaugöffnung erfolgt. Somit ist auch die Teilezahl der Rohreinsätze zur Erzeugung des Ringspalts verringert. Ferner wird durch diese Lösung der Druckverlust reduziert und mithin der Durchsatz und die dadurch erzielbare Heizleistung eines an das Gasgebläse angeschlossenen Heizgeräts erhöht.Due to the one-piece connection and design of the outer housing with the pipe section, a seal between the two components is obsolete both in the area of the inlet of air and fuel gas and in the area of the outlet of the adapter device. In addition to reducing the number of parts, it is also advantageous that incorrect assembly of seals that would otherwise be required is excluded are. In addition, the adapter device can be mounted on the gas blower more quickly. At the same time, it can be achieved with the solution according to the invention that the mixture of fuel gas and air does not have to be carried out inside the adapter device, rather the pipe section separating the coaxial flow channels is lengthened in the direction of flow so that it protrudes beyond the axial end edge of the outer housing and thus the mixture of fuel gas and air takes place at the suction opening. Thus, the number of parts of the pipe inserts for creating the annular gap is also reduced. Furthermore, this solution reduces the pressure loss and consequently increases the throughput and the heat output that can be achieved as a result of a heater connected to the gas fan.

Eine bevorzugte Ausführung sieht vor, dass der Adaptervorrichtung als Ganzes einstückig ausgebildet ist. Insbesondere eignet sich eine Fertigung aus Kunststoff im Spritzguss, bei dem das Außengehäuse und der Rohrabschnitt ohne Hinterschnitte ausgebildet sind. Eine weitere bevorzugte Ausführungsform sieht Aluminiumwerkstoffe vor, welche beispielsweise über Fertigungsverfahren basierend auf dem Druckgusskonzept abgebildet werden können.A preferred embodiment provides that the adapter device is designed in one piece as a whole. In particular, production from plastic by injection molding, in which the outer housing and the pipe section are designed without undercuts, is suitable. Another preferred embodiment provides aluminum materials that can be mapped, for example, using manufacturing processes based on the die-casting concept.

Bei einer Ausführungsvariante der Adaptervorrichtung ist ferner vorgesehen, dass der Rohrabschnitt den Lufteinlass und das Außengehäuse den Brenngaseinlass bestimmen, so dass der innerhalb des Rohrabschnitts verlaufende Strömungskanal zur Durchströmung mit Luft und der koaxial zwischen dem Au-ßengehäuse und dem Rohrabschnitt verlaufende Strömungskanal zur Durchströmung mit Brenngas ausgebildet sind. Vorzugsweise ist der Brenngaseinlass an einer äußeren Mantelfläche des Außengehäuses angeordnet und bildet einstückig an dem Außengehäuse ein Anschlussrohr zur Befestigung des Brenngasanschlusses.In a variant of the adapter device, it is also provided that the pipe section defines the air inlet and the outer housing defines the fuel gas inlet, so that the flow channel running inside the pipe section allows air to flow through and the flow channel running coaxially between the outer housing and the pipe section allows fuel gas to flow through are trained. The fuel gas inlet is preferably arranged on an outer jacket surface of the outer housing and forms a connection pipe in one piece on the outer housing for fastening the fuel gas connection.

Der Rohrabschnitt erstreckt sich in einer günstigen Ausführung ununterbrochen von dem Lufteinlass bis zum Auslass der Adaptervorrichtung. Vorzugsweise ist der Rohrabschnitt rotationssymmetrisch ausgebildet und leitet die angesaugte Luft über die gesamte axiale Strömungslänge durch die Adaptervorrichtung vom Lufteinlass bis zum Auslass. Es gibt keine Brenngaszuführung in den Strömungskanal der Luftströmung innerhalb der Adaptervorrichtung. Die Vermischung erfolgt erst, nachdem die Luft aus dem Rohrabschnitt am Auslass austritt.In a favorable embodiment, the pipe section extends uninterruptedly from the air inlet to the outlet of the adapter device. The pipe section is preferably designed to be rotationally symmetrical and guides the suctioned Air over the entire axial flow length through the adapter device from the air inlet to the outlet. There is no fuel gas supply into the flow channel of the air flow within the adapter device. Mixing only takes place after the air emerges from the pipe section at the outlet.

Eine Weiterbildung der Adaptervorrichtung ist dadurch gekennzeichnet, dass der Rohrabschnitt von dem Lufteinlass zu dem Auslass konisch zulaufend ausgebildet ist, so dass sich eine axiale Durchströmungsquerschnittsfläche des innerhalb des Rohrabschnitts liegenden Strömungskanals zum Auslass hin verringert. Ferner ist bevorzugt, dass die Durchströmungsquerschnittsfläche des Rohrabschnitts im axialen Strömungsverlauf vom Lufteinlass zum Auslass stetig abnimmt und am Auslass am geringsten ist. Die angesaugte und den Rohrabschnitt durchströmende Luft wird somit durch die Adaptervorrichtung beschleunigt und erzeugt am Auslass einen Unterdruck, der genutzt werden kann, um das Brenngas aus dem koaxial den Rohrabschnitt umschließenden Strömungskanal für das Brenngas zu saugen. Da der Auslass der Adaptervorrichtung an der Ansaugöffnung des Gasgebläses anliegt, wird das Brenngas indirekt über den beschriebenen Unterdruck als auch direkt von dem Gasgebläse angesaugt. Der Unterdruck ist dabei über die Durchströmungsquerschnittsfläche des Rohrabschnitts am Auslass festlegbar.A further development of the adapter device is characterized in that the pipe section is designed to taper conically from the air inlet to the outlet, so that an axial flow cross-sectional area of the flow channel located within the pipe section is reduced towards the outlet. It is further preferred that the flow cross-sectional area of the pipe section decreases steadily in the axial flow path from the air inlet to the outlet and is smallest at the outlet. The air that is sucked in and flowing through the pipe section is thus accelerated by the adapter device and generates a negative pressure at the outlet which can be used to suck the fuel gas out of the flow channel for the fuel gas that coaxially surrounds the pipe section. Since the outlet of the adapter device rests against the suction opening of the gas blower, the fuel gas is drawn in indirectly via the negative pressure described and also directly by the gas blower. The negative pressure can be determined via the flow cross-sectional area of the pipe section at the outlet.

Bei einer weiteren Ausführungsvariante der Adaptervorrichtung weist das Au-ßengehäuse in axialer Strömungsrichtung gesehen einen sich zu dem Auslass hin vergrößernden Innendurchmesser auf, so dass sich eine axiale Durchströmungsquerschnittsfläche des zwischen dem Rohrabschnitt und dem Außengehäuse liegenden Strömungskanals für das Brenngas zum Auslass hin vergrößert. Dabei ist insbesondere vorteilhaft, wenn die Durchströmungsquerschnittsfläche des zwischen dem Rohrabschnitt und dem Außengehäuse liegenden Strömungskanals für das Brenngas zum Auslass hin stetig zunimmt. Soweit der Rohrabschnitt gleichzeitig im Durchströmungsquerschnitt zum Auslass hin verkleinert wird, verlaufen das Außengehäuse und der Rohrabschnitt entlang ihrer axialen Strömungsrichtung in radialer Richtung auseinander.In a further embodiment variant of the adapter device, the outer housing has, viewed in the axial flow direction, an inner diameter that increases towards the outlet, so that an axial flow cross-sectional area of the flow channel for the fuel gas between the pipe section and the outer housing increases towards the outlet. It is particularly advantageous if the flow cross-sectional area of the flow channel for the fuel gas, located between the pipe section and the outer housing, increases steadily towards the outlet. As far as the pipe section at the same time in the flow cross-section to the outlet is reduced in size, the outer housing and the pipe section diverge in the radial direction along their axial flow direction.

Die Adaptervorrichtung wird an dem Gasgebläse montiert. Eine bevorzugte Ausführung der Adaptervorrichtung sieht deshalb vor, dass an der axialen Stirnkante des Außengehäuses Befestigungsmittel zu ihrer Befestigung an dem Gasgebläse vorgesehen sind. Insbesondere kann an der axialen Stirnkante auch ein Flansch ausgebildet sein, über den die Adaptervorrichtung an dem Gasgebläse verschraubt wird. Die jeweils an dem Gasgebläse und der Adaptervorrichtung zusammenwirkenden Befestigungsmittel sind derart in Umfangsrichtung zueinander angeordnet, dass die Adaptervorrichtung in verschiedenen Rotationspositionen am Gasgebläse montierbar ist. Somit kann die Ausrichtung des Gasanschlusses in verschiedene Umfangsrichtungen erfolgen und die Adaptervorrichtung ist geeignet für unterschiedliche Einbaupositionen.The adapter device is mounted on the gas blower. A preferred embodiment of the adapter device therefore provides that fastening means for fastening it to the gas blower are provided on the axial end edge of the outer housing. In particular, a flange can also be formed on the axial end edge, via which the adapter device is screwed to the gas blower. The fastening means interacting in each case on the gas blower and the adapter device are arranged in the circumferential direction relative to one another in such a way that the adapter device can be mounted on the gas blower in various rotational positions. The gas connection can thus be aligned in different circumferential directions and the adapter device is suitable for different installation positions.

Eine Weiterbildung der Adaptervorrichtung ist zudem dadurch gekennzeichnet, dass an einer äußeren Mantelfläche des Außengehäuses eine Öffnung vorgesehen ist, welche eine Druckverbindung zu dem Strömungskanal zwischen dem Außengehäuse und dem Rohrabschnitt herstellt. An der Öffnung ist vorzugsweise ein von der äußeren Mantelfläche des Außengehäuses vorstehender Zapfen ausgebildet, auf den beispielsweise ein Schlauch zur Druckabnahme und Prüfung des Drucks im Strömungskanal des Brenngases aufsteckbar ist.A further development of the adapter device is also characterized in that an opening is provided on an outer jacket surface of the outer housing, which creates a pressure connection to the flow channel between the outer housing and the pipe section. A pin projecting from the outer jacket surface of the outer housing is preferably formed at the opening, onto which a hose, for example, can be plugged for taking pressure off and checking the pressure in the flow channel of the fuel gas.

Die Erfindung umfasst ferner ein Gasgebläse mit einem Gebläsegehäuse, einem Motor und einem Gebläserad, wobei das Gebläsegehäuse eine Ansaugöffnung und eine Ausblasöffnung aufweist und an der Ansaugöffnung die vorstehend beschriebene Adaptervorrichtung mit dem Außengehäuse derart befestigbar ist, dass der Rohrabschnitt in die Ansaugöffnung des Gasgebläses hineinragt. Die Zusammenführung des Brenngases mit der Luft erfolgt im Bereich der Ansaugöffnung des Gasgebläses, so dass die die Ansaugöffnung des Gasgebläses bestimmenden Bauteile mit genutzt werden, um eine Düse zu gestalten, welche einen Einlaufspalt für das Brenngas bildet. Eine Weiterbildung sieht hierbei vor, dass an der Ansaugöffnung selbst zusätzlich eine Einlaufdüse vorgesehen ist, welche zusammen mit einer äußeren Mantelfläche des Rohrabschnitts im Bereich der Ansaugöffnung den Einströmspalt für das Brenngas bildet. Die Einlaufdüse verringert in Strömungsrichtung die durchströmbare Querschnittsfläche im Bereich der Ansaugöffnung. Die Adaptervorrichtung wird mit ihrer axialen Stirnkante des Außengehäuses an dem Gasgebläse oder der Einlaufdüse des Gasgebläses befestigt, dass der hervorstehende Rohrabschnitt und die Einlaufdüse in einer Axialebene verlaufen. Die Mischung von Brenngas und angesaugter Luft erfolgt beim Eintritt in die Ansaugöffnung.The invention further comprises a gas blower with a blower housing, a motor and a blower wheel, wherein the blower housing has a suction opening and a blow-out opening and the adapter device described above can be attached to the suction opening with the outer housing in such a way that the pipe section protrudes into the suction opening of the gas blower. The fuel gas is combined with the air in the area of the suction opening of the gas blower, so that the components determining the suction opening of the gas blower are also used to design a nozzle which forms an inlet gap for the fuel gas. A further education provides here that an inlet nozzle is additionally provided on the suction opening itself, which together with an outer jacket surface of the pipe section forms the inflow gap for the fuel gas in the area of the suction opening. The inlet nozzle reduces the cross-sectional area through which the flow can flow in the area of the suction opening. The adapter device is attached with its axial end edge of the outer housing to the gas blower or the inlet nozzle of the gas blower so that the protruding pipe section and the inlet nozzle run in an axial plane. The mixture of fuel gas and sucked-in air takes place when it enters the suction opening.

Das Gasgebläse ist ferner in einer Ausführungsvariante dadurch gekennzeichnet, dass an der Adaptervorrichtung eine Trägerplatte zur befestigenden Halterung von mindestens einem Gasventil befestigt ist, so dass das mindestens eine Gasventil über die Trägerplatte an der Adaptervorrichtung und somit an dem Gasgebläse fixierbar ist. Mit dieser Ausführung ist gewährleistet, dass das Gasgebläse mit der Adaptervorrichtung und dem Gasventil oder den Gasventilen als Baueinheit montierbar und vertreibbar ist.In one variant, the gas blower is further characterized in that a carrier plate is fastened to the adapter device for the fastening holding of at least one gas valve, so that the at least one gas valve can be fixed to the adapter device and thus to the gas blower via the carrier plate. This embodiment ensures that the gas blower with the adapter device and the gas valve or the gas valves can be installed and distributed as a structural unit.

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 Seitenansicht einer Ausführung einer Adaptervorrichtung;
Fig. 2
eine Ansicht im Radialschnitt B-B durch die axiale Mitte der Adaptervorrichtung aus Fig. 1,
Fig. 3
eine Ansicht im Axialschnitt A-A der Adaptervorrichtung aus Fig. 1,
Fig. 4
die Detailansicht Z aus Figur 3;
Fig. 5
eine Gesamtansicht eines Gasgebläses im Schnitt;
Fig. 6
eine Gesamtansicht eines Gasgebläses in perspektivischer Ansicht.
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 the figures. Show it:
Fig. 1
a side view of an embodiment of an adapter device;
Fig. 2
a view in radial section BB through the axial center of the adapter device Fig. 1 ,
Fig. 3
a view in axial section AA of the adapter device Fig. 1 ,
Fig. 4
the detail view Z from Figure 3 ;
Fig. 5
an overall view of a gas blower in section;
Fig. 6
an overall view of a gas blower in a perspective view.

Die Figuren 1-3 zeigen ein Ausführungsbeispiel der einstückigen Adaptervorrichtung 1 mit dem Außengehäuse 2, das den axialen Lufteinlass 8 und den radialen Brenngaseinlass 9 mittels des Stutzens 3 aufweist. Innerhalb des Au-ßengehäuses 2 ist einstückig der sich in axialer Richtung durch das Außengehäuse 2 bis zu dem Auslass 5 der Adaptervorrichtung 1 erstreckende Rohrabschnitt 4 ausgebildet, durch den der Lufteinlass 8 von dem Brenngaseinlass 9 getrennt wird. Der Rohrabschnitt 4 bildet zusammen mit dem Außengehäuse 2 die zwei getrennten koaxialen Strömungskanäle 6, 7 durch die Adaptervorrichtung 1, wobei der zwischen dem Außengehäuse 2 und dem Rohrabschnitt 4 liegende Strömungskanal 7 den Strömungspfad für das Brenngas und der innerhalb des Rohrabschnitts 4 liegende Strömungskanal 6 den Strömungspfad für die angesaugte Luft bereitstellt. Durch den durchgängigen, ununterbrochenen Rohrabschnitt 4 strömen die beiden Medien Luft und Brenngas in den koaxialen Strömungskanälen 6, 7 durch die gesamte Adaptervorrichtung 1 getrennt, bevor sie im Bereich des Auslasses 5 der Adaptervorrichtung 1 zusammengeführt werden. Der Strömungskanal 7 für das Brenngas ist kürzer und endet an der axialen Stirnkante 10 des Außengehäuses, welche durch die Flanschplatte 19 gebildet ist. Der Rohrabschnitt 4 steht in axialer Strömungsrichtung SR gesehen im Bereich des Auslasses 5 über eine Länge L über die axiale Stirnkante 10 der Flanschplatte 19 des Außengehäuses 2 um den Abschnitt 14 hervor, um im montierten Zustand der Adaptervorrichtung 1 an dem Gasgebläse 50 in die Ansaugöffnung 54 des Gasgebläses 50 hineinzuragen, wie es in Figur 5 gezeigt ist. Die Zusammenführung der Strömungen an Brenngas und Luft erfolgt dabei im Bereich der Ansaugöffnung, d.h. am Auslass der Adaptervorrichtung 1.the Figures 1-3 show an embodiment of the one-piece adapter device 1 with the outer housing 2, which has the axial air inlet 8 and the radial fuel gas inlet 9 by means of the connector 3. The tube section 4, which extends in the axial direction through the outer housing 2 to the outlet 5 of the adapter device 1 and separates the air inlet 8 from the fuel gas inlet 9, is formed in one piece within the outer housing 2. The pipe section 4, together with the outer housing 2, forms the two separate coaxial flow channels 6, 7 through the adapter device 1, the flow channel 7 located between the outer housing 2 and the pipe section 4 being the flow path for the fuel gas and the flow channel 6 located within the pipe section 4 being the Provides flow path for the sucked air. The two media air and fuel gas flow through the continuous, uninterrupted pipe section 4 in the coaxial flow channels 6, 7, separated by the entire adapter device 1, before they are brought together in the area of the outlet 5 of the adapter device 1. The flow channel 7 for the fuel gas is shorter and ends at the axial end edge 10 of the outer housing, which is formed by the flange plate 19. The pipe section 4, seen in the axial flow direction SR, protrudes in the area of the outlet 5 over a length L over the axial end edge 10 of the flange plate 19 of the outer housing 2 around the section 14, in order to enter the suction opening 54 in the assembled state of the adapter device 1 on the gas blower 50 of the gas blower 50, as shown in Figure 5 is shown. The merging of the flows of fuel gas and air takes place in the area of the suction opening, ie at the outlet of the adapter device 1.

Bezugnehmend auf Figur 2 ist gut zu erkennen, dass der Rohrabschnitt 4 von dem Bereich des Lufteinlasses 8 zu dem Auslass 5 der Adaptervorrichtung 1 konisch zulaufend ausgebildet ist, so dass sich die axiale Durchströmungsquerschnittsfläche des innerhalb des Rohrabschnitts 4 liegenden Strömungskanals 6 zum Auslass 5 hin verringert. Im ersten Viertel der Axialerstreckung der Adaptervorrichtung 1 bildet der Strömungskanal 6 eine Stufe 20, daran anschließend reduziert sich die die Durchströmungsquerschnittsfläche des innerhalb des Rohrabschnitts 4 liegenden Strömungskanals 6 zum Auslass 5 hin stetig weiter. Am Auslass 5 ist die Durchströmungsquerschnittsfläche des Rohrabschnitts 4 geringsten. Dagegen ist der Strömungskanal 7 zwischen dem Rohrabschnitt 4 und dem Außengehäuse 2 genau entgegengesetzt konstruiert, nämlich so, dass sich der Innendurchmesser des Außengehäuses 2 in axialer Strömungsrichtung SR gesehen zu dem Auslass 5 hin stetig vergrößert. Die Durchströmungsquerschnittsfläche des zwischen dem Rohrabschnitt 4 und dem Außengehäuse 2 liegenden Strömungskanals 7 vergrößert sich zum Auslass 5 hin somit sowohl durch die sich aufweitende Form des Außengehäuses 2 und die konisch zulaufende Form des Rohrabschnitts 4.Referring to Figure 2 it can be clearly seen that the pipe section 4 of the area of the air inlet 8 to the outlet 5 of the adapter device 1 is designed to taper conically, so that the axial flow cross-sectional area of the flow channel 6 located within the pipe section 4 is reduced towards the outlet 5. In the first quarter of the axial extension of the adapter device 1, the flow channel 6 forms a step 20, after which the flow cross-sectional area of the flow channel 6 located within the pipe section 4 continues to decrease towards the outlet 5. At the outlet 5, the flow cross-sectional area of the pipe section 4 is the smallest. In contrast, the flow channel 7 between the pipe section 4 and the outer housing 2 is constructed in exactly the opposite way, namely in such a way that the inner diameter of the outer housing 2 increases steadily towards the outlet 5 as viewed in the axial flow direction SR. The flow cross-sectional area of the flow channel 7 located between the pipe section 4 and the outer housing 2 increases towards the outlet 5, both due to the widening shape of the outer housing 2 and the conically tapering shape of the pipe section 4.

Die Adaptervorrichtung 1 ist als Ganzes im Spritzgussverfahren einstückig aus Kunststoff gefertigt und weist keine Hinterschnitte auf.The adapter device 1 as a whole is manufactured in one piece from plastic by injection molding and has no undercuts.

Bezugnehmend auf die Figuren 3 und 4 zeigt eine Detailansicht Z die Öffnung 11 an der äußeren Mantelfläche des Außengehäuses 2. An der Mantelfläche ist einstückig der vorstehende Zapfen 12 ausgebildet, der mit der Öffnung 11 in Strömungsverbindung steht, so dass eine unmittelbare Verbindung zum Strömungskanal 7 zwischen dem Rohrabschnitt 4 und dem Außengehäuse 2 gewährleistet ist. Auf den Zapfen 12 ist beispielsweise ein Schlauch aufsteckbar, über den der Druck im Strömungskanal 7 abgegriffen wird.Referring to the Figures 3 and 4 shows a detailed view Z the opening 11 on the outer jacket surface of the outer housing 2. The protruding pin 12 is integrally formed on the jacket surface and is in flow connection with the opening 11, so that a direct connection to the flow channel 7 between the pipe section 4 and the outer housing 2 is guaranteed. A hose, for example, via which the pressure in the flow channel 7 is tapped, can be plugged onto the pin 12.

Figur 5 zeigt die Adaptervorrichtung 1, welche mittels Schrauben über die Flanschplatte 19 an dem Gasgebläse 50 montiert ist. Das Gasgebläse 50 umfasst den Motor 52, welche das in dem Gebläsegehäuse 51 positionierte Gebläserad 53 antreibt. Über die Rotation des Gebläserads 53 werden durch die Ansaugöffnung 54 Brenngas und Luft aus der Adaptervorrichtung 1 angesaugt und im Bereich der Ansaugöffnung 54 gemischt. In den Stutzen 3 der Adaptervorrichtung 1 ist die Gaszuführung 90 angeschlossen. An dem Gebläsegehäuse 51 ist in der Ansaugöffnung 54 die Einlaufdüse 56 verbaut, die den Strömungsquerschnitt zum Gebläserad 53 hin verringert und zusammen mit der äußeren Mantelfläche des Rohrabschnitts 4 im Bereich der Ansaugöffnung 54 den Einströmspalt 57 für das Brenngas bildet. Die Einlaufdüse 56 liegt unmittelbar an der axialen Stirnfläche 10 der Adaptervorrichtung 1 an und reduziert die Durchströmungsquerschnittsfläche im Anschluss an den äußeren Strömungskanal 7 parallel zum vorstehenden Abschnitt 14 des Rohrabschnitts 4. Der vorstehende Abschnitt 14 des Rohrabschnitts 4 ragt in die Ansaugöffnung 54 hinein und wirkt mit der Einlaufdüse 57 zusammen, um neben der Ansaugung über das Gebläserad 53 einen Unterdruck zur definierten Zuführung des Brenngases über den Einströmspalt 57 zu gewährleisten. Figure 5 shows the adapter device 1, which is mounted on the gas blower 50 by means of screws via the flange plate 19. The gas blower 50 includes the motor 52 which drives the blower wheel 53 positioned in the blower housing 51. About the rotation of the fan wheel 53 are through the Suction opening 54, fuel gas and air are sucked in from the adapter device 1 and mixed in the area of the suction opening 54. The gas supply 90 is connected in the nozzle 3 of the adapter device 1. The inlet nozzle 56 is installed in the suction opening 54 of the fan housing 51, which reduces the flow cross-section towards the fan wheel 53 and, together with the outer surface of the pipe section 4 in the area of the suction opening 54, forms the inflow gap 57 for the fuel gas. The inlet nozzle 56 rests directly on the axial end face 10 of the adapter device 1 and reduces the flow cross-sectional area following the outer flow channel 7 parallel to the protruding section 14 of the pipe section 4. The protruding section 14 of the pipe section 4 protrudes into the suction opening 54 and is involved the inlet nozzle 57 together in order to ensure, in addition to the suction via the fan wheel 53, a negative pressure for the defined supply of the fuel gas via the inflow gap 57.

Figur 6 zeigt in einer perspektivischen Ansicht den kompakten Aufbau des Gasgebläses 50 mit an der Ansaugöffnung 54 befestigter Adaptervorrichtung 1. Die Verschraubung der Adaptervorrichtung 1 an dem Gebläsegehäuse 51 kann gleichzeitig genutzt werden, um eine Trägerplatte 60 vorzusehen, mit der die zwei Gasventile 61 gehalten werden. Die Trägerplatte 60 kann auch vertikal ausgerichtet sein oder um eine weitere Platte ergänzt werden, welche mit der Flanschplatte 19 in Verbindung steht und an dem Gebläsegehäuse 51 befestigt wird. Gezeigt sind beispielhaft zwei Gasventile 61, die Anzahl ist jedoch an den gewünschten Einsatzfall anpassbar. Figure 6 shows in a perspective view the compact structure of the gas blower 50 with the adapter device 1 attached to the suction opening 54. The carrier plate 60 can also be oriented vertically or can be supplemented by a further plate which is connected to the flange plate 19 and is fastened to the fan housing 51. Two gas valves 61 are shown by way of example, but the number can be adapted to the desired application.

Claims (15)

  1. An adapter device (1) adapted to be mounted on an intake opening of a gas blower and formed for the supply of combustion gas and air to the gas blower, comprising an outer housing (2) and a tube section (4) integrally extending from the outer housing (2) in the axial direction through the outer housing (2) up to an outlet (5) of the adapter device (1) and determining two separate coaxial flow channels (6, 7) through the adapter device (1) together with the outer housing (2), wherein the coaxial flow channels (6, 7) are merged in the region of the outlet (5) of the adapter device (1), wherein one of the flow channels has an air inlet (8) and the other one of the flow channels has a combustion gas inlet (9), and wherein the tube section (4) protrudes in the axial flow direction (SR) in the region of the outlet (5) of the adapter device (1) via an axial front edge (10) of the outer housing (2) in order to protrude into the suction opening of the gas blower in the assembled state of the adapter device (1) to the gas blower.
  2. The adapter device according to claim 1, characterised in that it is integrally formed.
  3. The adapter device according to claim 1 or 2, characterised in that the tube section (4) determines the air inlet (8) and the outer housing (2) determines the combustion gas inlet (9) so that the flow channel (6) running within the tube section (4) is formed for the throughflow of air and the flow channel (7) running coaxially between the outer housing (2) and the tube section (4) is formed for the throughflow of combustion gas.
  4. The adapter device according to any one of the preceding claims, characterised in that the tube section (4) extends uninterruptedly from the air inlet (8) up to the outlet (5) of the adapter device.
  5. The adapter device according to any one of the preceding claims, characterised in that the tube section (4) is formed such that it conically tapers from the air inlet (8) to the outlet (5) so that a throughflow cross-section of the flow channel (6) lying within the tube section (4) reduces in the direction to the outlet (5).
  6. The adapter device according to the preceding claim, characterised in that the throughflow cross-section of the tube section (4) continually decreases in the axial flow pattern from the air inlet (8) to the outlet (5) and is smallest at the outlet (5).
  7. The adapter device according to any one of the preceding claims, characterised in that the outer housing (2), as seen in the axial flow direction (SR), has an inner diameter which gets larger in the direction to the outlet (5) so that a throughflow cross-section of the flow channel (7) lying between the tube section (4) and the outer housing (2) gets larger in the direction to the outlet (5).
  8. The adapter device according to the preceding claim, characterised in that the throughflow cross-section of the flow channel (7) lying between the tube section (4) and the outer housing (2) continually increases in the direction to the outlet (5).
  9. The adapter device according to any one of the preceding claims, characterised in that fixation means for fixing the adapter device (1) to the gas blower are provided at the axial front edge (10) of the outer housing (2).
  10. The adapter device according to any one of the preceding claims, characterised in that they are made from plastic and the outer housing (2) and the tube section (4) are formed free of undercuts.
  11. The adapter device according to any one of the preceding claims, characterised in that an opening (11) which creates a pressure connection to the flow channel (7) between the outer housing (2) and the tube section (4) is provided at an outer surface of the outer housing (2).
  12. The adapter device according to the preceding claim, characterised in that a lug (12) protruding from the outer surface of the outer housing (2) is provided at the opening (11).
  13. A gas blower (50) with a blower housing (51), an engine (52) and a blower wheel (53), wherein the blower housing (51) has a suction opening (54) and an outflow opening and the adapter device (1) according to any one of the preceding claims is fixed to the outer housing (2) at the suction opening (54) and the tube section (4) protrudes into the suction opening (54) of the gas blower (50).
  14. The gas blower according to the preceding claim, characterised in that an inlet nozzle (56) which together with the outer surface of the tube section (4) forms an inflow gap (57) in the region of the suction opening (54) is provided at the suction opening (54).
  15. The gas blower according to any one of the two preceding claims, characterised in that a support plate (60) for mounting at least one gas valve (61) is fixed to the adapter device (1) so that the at least one gas valve (61) can be fixed to the adapter device (1) and thus to the gas blower (50) via the support plate.
EP20158416.6A 2019-04-09 2020-02-20 Adapter device adapted to be mounted on an intake opening of a gas blower Active EP3722670B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019109369.4A DE102019109369A1 (en) 2019-04-09 2019-04-09 Adapter device designed to be attached to a suction opening of a gas blower

Publications (2)

Publication Number Publication Date
EP3722670A1 EP3722670A1 (en) 2020-10-14
EP3722670B1 true EP3722670B1 (en) 2021-09-15

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Application Number Title Priority Date Filing Date
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Country Status (3)

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EP (1) EP3722670B1 (en)
CN (1) CN210122968U (en)
DE (1) DE102019109369A1 (en)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29506691U1 (en) * 1995-04-20 1996-08-29 Papst Motoren Gmbh & Co Kg Burner fan with radial impeller
JP3686487B2 (en) * 1996-09-12 2005-08-24 東京瓦斯株式会社 Original mixed gas combustion equipment
DE19729047C1 (en) * 1997-07-08 1998-09-24 Honeywell Bv Air mixer for gas burner
DE102007022008B4 (en) * 2007-05-08 2009-02-26 Saia-Burgess Dresden Gmbh Combined fan / gas valve unit
DE102011014117A1 (en) * 2011-03-15 2012-09-20 Ebm-Papst Landshut Gmbh Mixing device for mixing combustion air and gas for a gas appliance
ITPD20110372A1 (en) * 2011-11-24 2013-05-25 Ln 2 Srl Socio Unico AIR-GAS MIXER DEVICE FOR COMBUSTIBLE GAS BURNERS WITH PRE-MIXING
ITPD20130189A1 (en) * 2013-07-05 2015-01-06 Sit La Precisa S P A Con Socio Uni Co AIR-GAS MIXER DEVICE FOR PRE-MIXING BURNER EQUIPMENT
EP2927584A1 (en) * 2014-04-02 2015-10-07 Honeywell Technologies Sarl Monolithic fuel gas/air mixing device for a gas burner
EP3064778B1 (en) * 2015-03-06 2022-02-16 ELICA S.p.A. Radial fan with air-gas mixing arrangement
DE202019102045U1 (en) * 2019-04-09 2019-04-15 Ebm-Papst Landshut Gmbh Adapter device designed for attachment to a suction port of a gas blower

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CN210122968U (en) 2020-03-03
DE102019109369A1 (en) 2020-10-15

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