EP3722670B1 - Dispositif adaptateur conçu pour être fixé à demeure sur une ouverture d'aspiration d'une soufflante à gaz - Google Patents

Dispositif adaptateur conçu pour être fixé à demeure sur une ouverture d'aspiration d'une soufflante à gaz 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
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.)
Active
Application number
EP20158416.6A
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German (de)
English (en)
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EP3722670A1 (fr
Inventor
Jan Kopper
Michael Boiger
Manuel HÄGLSPERGER
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.)
Ebm Papst Landshut GmbH
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Ebm Papst Landshut GmbH
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Publication date
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Publication of EP3722670A1 publication Critical patent/EP3722670A1/fr
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Publication of EP3722670B1 publication Critical patent/EP3722670B1/fr
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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)

Claims (15)

  1. Dispositif adaptateur (1) conçu pour être fixé à demeure sur une ouverture d'aspiration d'une soufflante à gaz et réalisé pour l'alimentation de gaz combustible et d'air à la soufflante à gaz, comprenant un boîtier extérieur (2) et une section de tube (4) s'étendant du boîtier extérieur (2) d'un seul tenant dans la direction axiale par le boîtier extérieur (2) jusqu'à une sortie (5) du dispositif adaptateur (1), laquelle détermine avec le boîtier extérieur (2) deux canaux d'écoulement (6, 7) coaxiaux séparés par le dispositif adaptateur (1), dans lequel les canaux d'écoulement (6, 7) coaxiaux sont réunis dans la zone de la sortie (5) du dispositif adaptateur (1), dans lequel un des canaux d'écoulement présente une entrée d'air (8) et l'autre des canaux d'écoulement présente une entrée de gaz combustible (9), et dans lequel la section de tube (4) fait saillie dans la zone de la sortie (5) du dispositif adaptateur (1) d'une arête frontale axiale (10) du boîtier extérieur (2) dans la direction d'écoulement axiale (SR) pour pénétrer à l'état monté du dispositif adaptateur (1) sur la soufflante de gaz dans l'ouverture d'aspiration de la soufflante à gaz
  2. Dispositif adaptateur selon la revendication 1, caractérisé en ce qu'il est réalisé d'un seul tenant.
  3. Dispositif adaptateur selon la revendication 1 ou 2, caractérisé en ce que la section de tube (4) détermine l'entrée d'air (8) et le boîtier extérieur (2) détermine l'entrée de gaz combustible (9), de sorte que le canal d'écoulement (6) s'étendant à l'intérieur de la section de tube (4) est réalisé pour la traversée avec l'air et le canal d'écoulement (7) s'étendant coaxialement entre le boîtier extérieur (2) et la section de tube (4) est réalisé pour la traversée avec le gaz combustible.
  4. Dispositif adaptateur selon l'une quelconque des revendications précédentes, caractérisé en ce que la section de tube (4) s'étend de manière ininterrompue de l'entrée d'air (8) jusqu'à la sortie (5) du dispositif adaptateur.
  5. Dispositif adaptateur selon l'une quelconque des revendications précédentes, caractérisé en ce que la section de tube (4) est réalisée de forme conique de l'entrée d'air (8) à la sortie (5), de sorte qu'une section transversale de traversée du canal d'écoulement (6) situé à l'intérieur de la section de tube (4) diminue vers la sortie (5).
  6. Dispositif adaptateur selon la revendication précédente, caractérisé en ce que la section transversale de traversée de la section de tube (4) dans le trajet d'écoulement axial diminue constamment de l'entrée d'air (8) à la sortie (5) et est la plus faible à la sortie (5).
  7. Dispositif adaptateur selon l'une quelconque des revendications précédentes, caractérisé en ce que le boîtier extérieur (2) présente vu dans la direction d'écoulement axiale (SR) un diamètre intérieur augmentant vers la sortie (5), de sorte qu'une section transversale de traversée du canal d'écoulement (7) situé entre la section de tube (4) et le boîtier extérieur (2) augmente vers la sortie (5).
  8. Dispositif adaptateur selon la revendication précédente, caractérisé en ce que la section transversale de traversée du canal d'écoulement (7) situé entre la section de tube (4) et le boîtier extérieur (2) augmente constamment vers la sortie (5).
  9. Dispositif adaptateur selon l'une quelconque des revendications précédentes, caractérisé en ce que des moyens de fixation pour la fixation du dispositif adaptateur (1) sur la soufflante à gaz sont prévus sur l'arête frontale axiale (10) du boîtier extérieur (2).
  10. Dispositif adaptateur selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est fabriqué en plastique et le boîtier extérieur (2) et la section de tube (4) sont réalisés sans contre-dépouille.
  11. Dispositif adaptateur selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une ouverture (11), laquelle établit une liaison de pression avec le canal d'écoulement (7) entre le boîtier extérieur (2) et la section de tube (4), est prévue sur une surface d'enveloppe extérieure du boîtier extérieur (2).
  12. Dispositif adaptateur selon la revendication précédente, caractérisé en ce qu'un tenon (12) en saillie de la surface d'enveloppe extérieure du boîtier extérieur (2) est réalisé sur l'ouverture (11).
  13. Soufflante à gaz (50) avec un boîtier de soufflante (51), un moteur (52) et une roue de soufflante (53), dans laquelle le boîtier de soufflante (51) présente une ouverture d'aspiration (54) et une ouverture de soufflage et le dispositif adaptateur (1) selon l'une quelconque des revendications précédentes est fixé avec le boîtier extérieur (2) sur l'ouverture d'aspiration (54) et la section de tube (4) fait saillie dans l'ouverture d'aspiration (54) de la soufflante à gaz (50).
  14. Soufflante à gaz selon la revendication précédente, caractérisée en ce qu'une buse d'entrée (56), laquelle forme conjointement avec une surface d'enveloppe extérieure de la section de tube (4) dans la zone de l'ouverture d'aspiration (54) une fente d'entrée (57), est prévue au niveau de l'ouverture d'aspiration (54).
  15. Soufflante à gaz selon l'une quelconque des deux revendications précédentes, caractérisée en ce qu'une plaque support (60) pour la fixation à demeure d'au moins une soupape à gaz (61) est fixée sur le dispositif adaptateur (1), de sorte que l'au moins une soupape à gaz (61) peut être fixée par le biais de la plaque support sur le dispositif adaptateur (1) et ainsi sur la soufflante à gaz (50).
EP20158416.6A 2019-04-09 2020-02-20 Dispositif adaptateur conçu pour être fixé à demeure sur une ouverture d'aspiration d'une soufflante à gaz Active EP3722670B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019109369.4A DE102019109369A1 (de) 2019-04-09 2019-04-09 Adaptervorrichtung ausgeführt zur befestigten Anordnung an einer Ansaugöffnung eines Gasgebläses

Publications (2)

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

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EP20158416.6A Active EP3722670B1 (fr) 2019-04-09 2020-02-20 Dispositif adaptateur conçu pour être fixé à demeure sur une ouverture d'aspiration d'une soufflante à gaz

Country Status (3)

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

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29506691U1 (de) * 1995-04-20 1996-08-29 Papst Motoren Gmbh & Co Kg Brennergebläse mit Radiallaufrad
JP3686487B2 (ja) * 1996-09-12 2005-08-24 東京瓦斯株式会社 元混合型ガス燃焼装置
DE19729047C1 (de) * 1997-07-08 1998-09-24 Honeywell Bv Mischvorrichtung zur Erzeugung eines Gemisches aus Gas und Verbrennungsluft für einen Brenner
DE102007022008B4 (de) * 2007-05-08 2009-02-26 Saia-Burgess Dresden Gmbh Kombinierte Lüfter-/Gasventileinheit
DE102011014117A1 (de) * 2011-03-15 2012-09-20 Ebm-Papst Landshut Gmbh Mischvorrichtung zur Mischung von Verbrennungsluft und Gas für ein Gasgerät
ITPD20110372A1 (it) * 2011-11-24 2013-05-25 Ln 2 Srl Socio Unico Dispositivo miscelatore aria-gas per bruciatori a gas combustibile con pre-miscelazione
ITPD20130189A1 (it) * 2013-07-05 2015-01-06 Sit La Precisa S P A Con Socio Uni Co Dispositivo miscelatore aria-gas per apparecchi bruciatori a pre-miscelazione
EP2927584A1 (fr) * 2014-04-02 2015-10-07 Honeywell Technologies Sarl Dispositif mélangeur intégrale de gaz combustible/aire pour un brûleur à gaz
EP3064778B1 (fr) * 2015-03-06 2022-02-16 ELICA S.p.A. Ventilateur radial avec dispositif de mélange air-gaz
DE202019102045U1 (de) * 2019-04-09 2019-04-15 Ebm-Papst Landshut Gmbh Adaptervorrichtung ausgeführt zur befestigten Anordnung an einer Ansaugöffnung eines Gasgebläses

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DE102019109369A1 (de) 2020-10-15
CN210122968U (zh) 2020-03-03

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