EP4100680B1 - Mélangeur air-gaz - Google Patents

Mélangeur air-gaz Download PDF

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Publication number
EP4100680B1
EP4100680B1 EP21716244.5A EP21716244A EP4100680B1 EP 4100680 B1 EP4100680 B1 EP 4100680B1 EP 21716244 A EP21716244 A EP 21716244A EP 4100680 B1 EP4100680 B1 EP 4100680B1
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EP
European Patent Office
Prior art keywords
gas
air
outer body
mixer
ring member
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
EP21716244.5A
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German (de)
English (en)
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EP4100680A1 (fr
Inventor
Berrin KARAUZUM
Yalcin OTER
Cevat Erkin TEKIN
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.)
Emas Makina Sanayi AS
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Emas Makina Sanayi AS
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Publication of EP4100680A1 publication Critical patent/EP4100680A1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details
    • F23D14/62—Mixing devices; Mixing tubes
    • 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
    • F23L13/00—Construction of valves or dampers for controlling air supply or draught
    • F23L13/02—Construction of valves or dampers for controlling air supply or draught pivoted about a single axis but having not other movement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/14—Special features of gas burners
    • F23D2900/14021—Premixing burners with swirling or vortices creating means for fuel or air

Definitions

  • the present invention relates to a modular gas-air mixer which is used to transfer gas and air to the combustion chamber upon mixing thereof.
  • the combustion products (gas and air) are mixed by the fan and gas-air mixer and sent to the combustion chamber. Since the gas-air mixture formed in this way is supplied homogeneously, all or almost all of the gas burns.
  • the pre-mixing fan used in gas burning devices air and gas are sucked and the gas-air mixture is blown into the burner.
  • Electronically or pneumatically adjustable gas valves are used to adjust the mixing ratio.
  • the gas valve provides gas flow with the effect of negative pressure and the gas is directly mixed into the sucked air.
  • gas-air mixers are comprised of a chamber, an air passage channel for the passage of air through the chamber, a gas inlet opening into the chamber and a plurality of holes located on the air passage channel. While the air passes through the air channel, the gas enters the chamber. Gas mixes with air by passing through the holes on the air passage channel. Depending on the flow of the sucked air, the gas mixes at an appropriate rate and the air + gas mixture required for combustion is formed.
  • the negative pressure (the vacuum effect) is obtained by means of a venturi arranged on the suction side of the fan, wherein a locally higher flow velocity and negative pressure are obtained by locally reducing the flow cross-section (Bernoulli-equation).
  • the air passage channel is comprised of two conical cylindrical parts which are separate from each other and are joined afterwards, and the holes used for gas passage are located at the joints of the said two parts.
  • WO2018015130A1 discloses a gas-air mixing device comprising an air inlet channel body including a narrowing section, an air outlet channel body, and which is comprised of extension openings provided on the air outlet channel body.
  • the invention for the passage of the gas into the air passage channel, the invention comprises two conical cylindrical parts with different diameters in the part where they are connected to each other and the gas passes through the extension openings at the junction part of the said two parts.
  • the said application cannot be used for gas burners (boilers, etc.) with different energy levels; a separate mixer must be prepared for each energy group (24 kW, 45 kW, etc.).
  • the structure in the said application does not allow the modulation rate to be changed according to the demand of the device.
  • the European Patent Application EP3662989A1 discloses a fluid mixer wherein a valve is arranged inside a venturi tube.
  • the objective of the present invention is to provide a gas-air mixer which is modular for gas burning devices with different energy levels in which they are to be used and whose capacity can be changed without changing its interior part.
  • the objective of the present invention is to provide a gas-air mixer, which enables to increase the modulation rate of the product by keeping the minimum fan speed of the device at a range in which the fan of the device can operate safely, and in which the amount of the incoming air can be changed.
  • the objective of the present invention is to provide a gas-air mixer which allows the air passage to be more turbulent and therefore to increase the amount of gas in the mixture without increasing the pressure loss of the product.
  • the objective of the present invention is to provide a gas-air mixer which has low pressure loss.
  • the objective of the invention is to increase the modulation level with a modular structure while keeping the minimum fan speed within the safe range in which the fan can operate without increasing the maximum fan speed, and thereby preventing the high noise level caused by the high maximum fan speed.
  • the mixer (1) of the present invention is comprised of an outer body (2) into which gas is transferred through a gas inlet (21), an inner body (3) in the form of a cylinder which is placed inside the outer body (2) and comprises air inlet-outlet, openings (33) which are provided on the inner body (3), and the turbulator (4) or valve system (5) which is located on the air inlet of the inner body (3).
  • the outer body (2) located in the mixer (1) is preferably in the form of a cylinder that is open at both ends and there is a gas inlet (21) in the form of a hole, preferably on the middle part of the outer body (2).
  • the inner body (3) located in the mixer (1) comprises parts, the section of which narrows and expands, and it has an opening (33) in the form of a hole preferably where the section is narrow.
  • the turbulator (4) and/or the valve system (5) makes the air which will enter into the inner body (3) more turbulent without changing the fan (which transfers the air to the inner body (3)) or by increasing its speed at a minimum level, and in this way, it enables to increase the amount of gas in the mixture without increasing the pressure loss of the product. Therefore, for gas burning devices having different energy levels (24 kW, 45 kW boiler, etc.), a single mixer (1) can be used without changing the inner body (3) and outer body (2), only by changing the valve system (5) and/or the turbulator (4). Thus, it is possible to provide the air-gas mixture of the boilers with different energy needs by changing only the turbulator (4) and/or the valve system (5) during production. In addition, this minimizes labor and mold costs, and also reduces mass production costs. Since different modulation rates can be provided easily with the modular structure, it also reduces inventory costs.
  • the turbulator (4) and/or the valve system (5) are changed according to the boiler energy level after mounting of the outer body (2) and the inner body (3) in the production.
  • the air first comes onto the turbulator (4) and/or the valve system (5) on the inner body (3), and the air moves in the inner body (3) upon becoming turbulent in the turbulator (4) and/or the valve system (5) and/or in a desired amount of passage.
  • the gas is filled into the outer body (2) through the gas inlet (21) on the outer body (2) and the gas flows into the inner body (3) through the opening (33) according to the Bernoulli-equation (negative pressure state with high flow velocity due to narrowing section in the inner body (3)), and mixes with the air.
  • the inner body (3) is comprised of air inlet channel (31) and outlet channel (32), which are a single piece, and openings (33) located at the junction of the air inlet channel (31) and the air outlet channel (32).
  • the air inlet channel (31) is comprised of the flat mounting surface and the narrowing section, and the outlet channel (32) section has a conical structure with an expanding section.
  • the turbulator (4) and/or the valve system (5) are placed on the flat mounting surface on the air inlet channel (31).
  • the air before the air reaches the narrowing section structure, it is regulated by the turbulator (4) and/or the valve system (5), it becomes a turbulent flow and/or the amount of air passage is determined and the noise and poor quality combustion that may occur in different gases is prevented.
  • the regulated flow prevents poor quality combustion caused by the gas quality.
  • the air inlet channel (31) has a mounting surface (311) extending outward from the outer body (2) and when the inner body (3) is placed inside the outer body (2), the mounting surface (311) remains outside the outer body length.
  • the turbulator (4) and/or the valve system (5) is fixed on the inner body (3) mounting surface (311) outside the outer body (2).
  • the turbulator (4) and/or the valve system (5) can be easily detached from and attached to the inner body (3) and outer body (2).
  • the minimum load and maximum load ratio which the mixer (Venturi) (1) can provide in gas burning devices is called the modulation ratio. Since the mixer (venturi) (1) provides the gas mixture, it enables the maximum possible gas ratio to be determined.
  • the device has a modular venturi structure so that it can operate in different modulation ranges in different models. The said modulation range is adjusted with the turbulator (4) and/or the valve system (5).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)

Claims (10)

  1. Un mélangeur (1) utilisé pour transférer le gaz et l'air dans la chambre de combustion dans les dispositifs de combustion de gaz, tels que les chaudières après mélange du même, comprenant :
    - au moins un corps extérieur (2) doté d'au moins une entrée de gaz (21) pour le transfert de gaz vers sa partie intérieure et d'un volume intérieur,
    - au moins un corps intérieur (3) placé à l'intérieur du corps extérieur (2), comprenant une entrée pour le passage de l'air et une sortie pour le mélange air-gaz, et au moins une ouverture (33) pour le passage du gaz à l'intérieur du corps extérieur (2),
    - au moins un turbulateur (4) utilisé pour augmenter la turbulence dans l'entrée d'air, augmenter le taux de modulation du dispositif et augmenter la vitesse minimale du ventilateur du dispositif en augmentant la vitesse maximale du ventilateur à laquelle le dispositif peut fonctionner dans une mesure minimale, et qui est composé de :
    • au moins un premier membre annulaire (41)
    • une partie centrale (42) qui est fournie de préférence sur la partie centrale du premier élément annulaire (41) et
    • une pluralité de lames fixés (43) positionnées entre la partie centrale (42) et le premier élément annulaire (41),
    caractérisé par le fait que au moins un premier élément annulaire (41) est fixé à la partie d'entrée d'air du corps intérieur (3).
  2. Un mélangeur (1), utilisé pour transférer le gaz et l'air dans la chambre de combustion dans les dispositifs de combustion de gaz, tels que les chaudières après leur mélange, comprenant:
    - au moins un corps extérieur (2) doté d'au moins une entrée de gaz (21) pour le transfert de gaz vers sa partie intérieur et d'un volume intérieur,
    - au moins un corps intérieur (3) placé à l'intérieur du corps extérieur (2), comprenant une entrée pour le passage de l'air et une sortie pour le mélange air-gaz, et au moins une ouverture (33) pour le passage du gaz à l'intérieur du corps extérieur (2),
    caractérisé par:
    - au moins un système de valve (5) qui permet de maintenir la vitesse minimale du ventilateur de l'appareil dans une plage sûre dans laquelle le ventilateur peut fonctionner en augmentant la vitesse maximale du ventilateur à laquelle l'appareil peut fonctionner à un niveau minimal pour déterminer le taux de modulation et qui est composé de :
    • un deuxième élément annulaire (51) fixé à la partie d'entrée d'air du corps intérieur (3),
    • au moins un axe rotatif (52) qui est fixé sur le deuxième élément annulaire (51),
    • au moins un volet (53) fixé à l'axe rotatif (52) et qui est mobile avec l'axe rotatif (52).
  3. Un mélangeur (1) selon la revendication 1 ou 2, comprenant un corps intérieur (3) constitué d'un canal d'entrée d'air (31) et d'un canal de sortie (32) qui sont d'une seule pièce, et des ouvertures (33) situées à la jonction du canal d'entrée d'air (31) et du canal de sortie d'air (32).
  4. Un mélangeur (1) selon la revendication 1 ou 2, comprenant une surface de montage (311) du canal d'entrée d'air (31) qui s'étend vers l'extérieur du corps extérieur (2) et reste à l'extérieur de la longueur du corps extérieur lorsque le corps intérieur (3) est placé à l'intérieur du corps extérieur (2).
  5. Un mélangeur (1) selon la revendication 1 ou 3, comprenant une lame (43) fixée à la partie centrale (42) à un angle correspondant à la direction d'entrée de l'air.
  6. Un mélangeur (1) selon la revendication 1 ou 2, comprenant au moins un élément d'étanchéité (6) qui empêche le gaz entrant dans la partie intérieure du corps extérieur (2) de fuir (sortir) entre la paroi intérieure du corps extérieur (2) et la surface supérieure du corps intérieur (3).
  7. Un mélangeur (1) selon la revendication 6, comprenant un élément d'étanchéité (6) qui est un joint ou un joint torique.
  8. Un mélangeur (1) selon la revendication 6, comprenant au moins une fente (35) formée avec des surfaces saillantes sur la surface extérieure du corps intérieur (3) et dans laquelle l'élément d'étanchéité (6) s'insère.
  9. Un mélangeur (1) selon la revendication 1 ou 2, comprenant un ensemble de fixation qui est utilisé pour fixer le corps intérieur sur le corps extérieur (2) et qui comprend :
    - au moins une goupille de verrouillage sous la forme d'une protubérance qui est donnée sur la surface extérieure du corps intérieur (3),
    - au moins un canal de verrouillage (22) donné à l'extrémité du corps extérieur (2) sous la forme d'une cavité inclinée sur le corps extérieur (2) et adapté à l'insertion de la goupille de verrouillage dans ce canal.
  10. Un mélangeur (1), utilisé pour transférer le gaz et l'air dans la chambre de combustion dans les dispositifs de combustion de gaz tels que les chaudières après mélange, comprenant:
    - au moins un corps extérieur (2) doté d'au moins une entrée de gaz (21) pour le transfert de gaz vers sa partie intérieure et ayant un volume intérieur,
    - au moins un corps intérieur (3) placé à l'intérieur du corps extérieur (2), comprenant une entrée pour le passage de l'air et une sortie pour le mélange air-gaz, et au moins une ouverture (33) pour le passage du gaz à l'intérieur du corps extérieur (2),
    - au moins un turbulateur (4) qui est utilisé pour rendre l'air plus turbulent et qui est composé de:
    • un premier élément annulaire (41), une partie centrale (42) située de préférence sur la partie médiane du premier élément annulaire (41), et une pluralité de lames fixés (43) positionnées entre la partie centrale (42) et le premier élément annulaire (41), caractérisés par :
    - au moins un système de valves (5) qui permet de déterminer le taux de modulation et d'augmenter la vitesse minimale du ventilateur de l'appareil en augmentant la vitesse maximale du ventilateur à laquelle l'appareil peut fonctionner en quantité minimale, et qui est composé de:
    • un deuxième élément annulaire (51) fixé à la partie d'entrée d'air du corps intérieur (3), au moins un axe rotatif (52) fixé sur le deuxième élément annulaire (51), au moins un volet (53) étant fixé à l'axe rotatif (52) et étant mobile avec l'axe rotatif (52).
EP21716244.5A 2021-01-21 2021-02-19 Mélangeur air-gaz Active EP4100680B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2021/00913A TR202100913A2 (tr) 2021-01-21 2021-01-21 Bi̇r hava gaz kariştirici
PCT/TR2021/050155 WO2022159051A1 (fr) 2021-01-21 2021-02-19 Mélangeur gaz-air

Publications (2)

Publication Number Publication Date
EP4100680A1 EP4100680A1 (fr) 2022-12-14
EP4100680B1 true EP4100680B1 (fr) 2024-08-07

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ID=75362655

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Application Number Title Priority Date Filing Date
EP21716244.5A Active EP4100680B1 (fr) 2021-01-21 2021-02-19 Mélangeur air-gaz

Country Status (3)

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EP (1) EP4100680B1 (fr)
TR (1) TR202100913A2 (fr)
WO (1) WO2022159051A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1315743B1 (it) * 2000-10-03 2003-03-18 Sit La Precisa Spa Dispositivo miscelatore aria-gas perfezionato.
DE102012023008A1 (de) * 2012-11-26 2014-05-28 Vaillant Gmbh Brenngas-Luft-Mischvorrichtung
EP3181964B1 (fr) * 2015-12-14 2018-08-22 Hamilton Sundstrand Corporation Clapet anti-retour
EP3662989A4 (fr) * 2017-08-03 2021-09-01 Time Engineering Co., Ltd. Mélangeur de fluide

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Publication number Publication date
WO2022159051A1 (fr) 2022-07-28
EP4100680A1 (fr) 2022-12-14
TR202100913A2 (tr) 2021-02-22

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