EP3974720B1 - Appareil de combustion de mélange doté d'un régulateur de gaz - Google Patents

Appareil de combustion de mélange doté d'un régulateur de gaz Download PDF

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Publication number
EP3974720B1
EP3974720B1 EP21193437.7A EP21193437A EP3974720B1 EP 3974720 B1 EP3974720 B1 EP 3974720B1 EP 21193437 A EP21193437 A EP 21193437A EP 3974720 B1 EP3974720 B1 EP 3974720B1
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EP
European Patent Office
Prior art keywords
air
gas
slot
mixers
gas mixture
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.)
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Application number
EP21193437.7A
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German (de)
English (en)
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EP3974720A1 (fr
Inventor
Tom Collins
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Bosch Thermotechnology Ltd
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Bosch Thermotechnology Ltd
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Publication of EP3974720A1 publication Critical patent/EP3974720A1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D23/00—Assemblies of two or more burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/34—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air
    • F23D14/36—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air in which the compressor and burner form a single unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/62—Mixing devices; Mixing tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/62—Mixing devices; Mixing tubes
    • F23D14/64—Mixing devices; Mixing tubes with injectors
    • 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
    • F23K5/005—Gaseous fuel from a central source to a plurality of burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/02—Regulating fuel supply conjointly with air supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/9901—Combustion process using hydrogen, hydrogen peroxide water or brown gas as fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/007—Mixing tubes, air supply regulation
    • 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
    • F23D2900/14641—Special features of gas burners with gas distribution manifolds or bars provided with a plurality of nozzles
    • 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
    • F23D2900/31019—Mixing tubes and burner heads
    • 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
    • F23K2400/201—Control devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/04—Measuring pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/06—Ventilators at the air intake
    • F23N2233/08—Ventilators at the air intake with variable speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2237/00—Controlling
    • F23N2237/02—Controlling two or more burners

Definitions

  • the present invention relates to an air-gas mixture burning appliance that comprises an air-gas mixing unit with a plurality of air-gas mixers for mixing of air and gas to form a combustible air-gas mixture, an air supply that is connected to the air-gas mixing unit and comprises a common air way for supply of air to the plurality of air-gas mixers, and a gas governor that is adapted to control supply of gas to the plurality of air-gas mixers dependant on an air pressure signal that is indicative of a static air pressure in the common air way. Furthermore, the present invention relates to a Venturi plate that forms a manifold which interconnects inlet sides of a plurality of Venturi-type mixing nozzles.
  • an air-gas mixture burning appliance with an air-gas mixing unit, a burning unit, and a gas governor wherein e.g. hydrogen may be used as gas and mixed with air to form a combustible air-gas mixture.
  • Such an air-gas mixture burning appliance usually performs "just in time” mixing of air and gas directly before the burning unit to minimise a respective volume of combustible air-gas mixture available in the event of a flashback.
  • a predefined point of mixing for the air and gas may be located near an associated combustion space directly downstream of the burning unit.
  • the gas governor may be used to accomplish a suitable pneumatic air-gas ratio control by regulating gas supply pressure in relation to an aspiration air pressure signal, i.e. by controlling supply of gas to the air-gas mixing unit.
  • the gas governor In order to provide stable control of the gas supply pressure, the gas governor must, nevertheless, be provided with a stable measurement of air pressure, i.e. with a stable pressure signal, which indicates a respective unaccelerated static pressure of the air in the air-gas mixing unit.
  • a given single air-gas mixer is e.g. embodied as a Venturi-type mixing nozzle
  • a stable measurement of a suitable air pressure signal that indicates the unaccelerated static pressure of the air may be performed by sampling this pressure via an annular slot of the Venturi-type mixing nozzle that encircles an air inlet of the Venturi-type mixing nozzle and that faces into a respective air flow.
  • Document EP3268668A2 shows an air-gas mixture burning appliance with an air-gas mixing unit and a gas governor controlling the fuel gas supply dependant on an air pressure signal indicative of a static air pressure in a common air way.
  • An air-gas mixer of the unit is at least partially surrounded by a slot which encompasses the common airway and which is connected to the gas governor via an air pressure signal port configured to provide the air pressure signal from the slot to the gas governor.
  • Documents CN2434553Y and CN107676981A show similar appliances.
  • Document JP 2019 203657 A describes a hot water supply device that includes a burner unit, a gas supply passage for supplying a fuel gas to a burner of the burner unit, a fan unit for supplying combustion air to the burner, a mixing portion for mixing the fuel gas to the combustion air at a downstream side of the fan unit to produce an air-fuel mixture, and a zero governor disposed in the gas supply passage to adjust the fuel gas supplied under a prescribed primary pressure to a secondary pressure according to a prescribed signal pressure, to supply the fuel gas to the mixing portion.
  • the mixing portion is composed of a venturi in which the air flows by rotation of the fan unit, and which sucks the fuel gas supplied from the zero governor by pressure reduction generated at that time, and a signal pressure to the zero governor is taken out from a downstream side with respect to the venturi.
  • the present invention relates to an air-gas mixture burning appliance that comprises an air-gas mixing unit with a plurality of air-gas mixers for mixing of air and gas to form a combustible air-gas mixture, an air supply that is connected to the air-gas mixing unit and comprises a common air way for supply of air to the plurality of air-gas mixers, a gas supply to supply gas to the air-gas mixing unit, and a gas governor that is adapted to control supply of gas to the plurality of air-gas mixers dependant on an air pressure signal that is indicative of a static air pressure in the common air way.
  • the plurality of air-gas mixers is at least partially surrounded by a slot which encompasses at least partially the common air way, and the slot is connected to the gas governor via an air pressure signal port which is configured to provide the air pressure signal from the slot to the gas governor.
  • the gas governor may be embodied to perform a pneumatic air-gas ratio control.
  • the gas used by the inventive air-gas mixture burning appliance may be hydrogen.
  • provision of the slot that surrounds at least partially the plurality of air-gas mixers of the air-gas mixing unit in the inventive air-gas mixture burning appliance allows stable and undisturbed measurement of static air pressure in the air-gas mixing unit of the inventive air-gas mixture burning appliance.
  • an improved air pressure signal representing the mean static air pressure experienced by all air-gas mixers of the plurality of air-gas mixers can be provided to the gas governor of the inventive air-gas mixture burning appliance such that control of supply of gas to the plurality of air-gas mixers by means of the gas governor may be improved significantly.
  • the slot is connected to the air pressure signal port via an associated plenum chamber.
  • the air pressure signal that is provided from the slot via the air pressure signal port to the gas governor may further be stabilised.
  • the plenum chamber is connected to the slot via a first plenum opening, the plenum chamber is connected to the air pressure signal port via a second plenum opening, and the second plenum opening is arranged closer to the common airway than the first plenum opening.
  • This configuration is advantageous by providing an enhanced stability and accuracy in reading of the air pressure signal, thus, allowing the air pressure signal to be more representative of the true average static air pressure in the common air way, i.e. of all air-gas mixers of the plurality of air-gas mixers.
  • the slot faces into an air flow which is directed via the common air way toward the plurality of air-gas mixers.
  • the air flow may directly enter the slot via the common air way.
  • the plurality of air-gas mixers is preferably arranged inside a housing, and the slot is formed inside, and at least partly along the housing.
  • the slot may easily be formed and provided in the inventive air-gas mixture burning appliance.
  • each one of the plurality of air-gas mixers is connected at a respective inlet side to a manifold, and the slot is formed in the manifold.
  • Each one of the plurality of air-gas mixers may be embodied as a Venturi-type mixing nozzle.
  • the plurality of air-gas mixers may securely and reliably be interconnected mechanically to form a single air-gas mixing unit in the inventive air-gas mixture burning appliance.
  • each one of the plurality of air-gas mixers is configured to restrict a gas flow supplied from the gas governor upstream of an associated point of mixing where the gas flow is combined with an air flow which is directed via the common air way toward the plurality of air-gas mixers.
  • the mixing of air and gas to form the combustible air-gas mixture may easily be improved.
  • the slot extends relative to a flow direction of the combustible air-gas mixture to such an extent that the air pressure signal port is located entirely downstream of the associated point of mixing.
  • This configuration is also advantageous by providing an enhanced stability and accuracy in reading of the air pressure signal, thus, allowing the air pressure signal to be more representative of the true average static air pressure in the common air way, i.e. of all air-gas mixers of the plurality of air-gas mixers.
  • the slot has a width that ranges between 1mm and 9mm.
  • the slot width is greater than 9mm, then the pressure reading is no longer representative of the true average static air pressure due to the flow of air not being restricted sufficiently.
  • the slot width is less than 1mm, then a respective response time in reading of the air pressure signal will be too great and affect performance and efficiency of the gas governor and, hence, performance and efficiency of the air-gas mixture burning appliance as such, as the gas governor may lag changes in air flow rate.
  • Fig. 1 shows an exemplary air-gas mixture burning appliance 100 with an air-gas mixing unit 110, an air supply 112, a gas supply 116, and a burning unit 120.
  • the air-gas mixture burning appliance 100 may be used in a boiler or, more generally, in a building heating system.
  • the gas used is hydrogen such that the air-gas mixture burning appliance 100 forms an air-hydrogen mixture burning appliance.
  • the air-gas mixing unit 110 is adapted for mixing of air and gas to form a combustible air-gas mixture 130.
  • the combustible air-gas mixture 130 is a homogenous mixture of the air and the gas.
  • the air is drawn into the air-gas mixing unit 110 via the air supply 112, which is connected to the air-gas mixing unit 110, and the gas is supplied to the air-gas mixing unit 110 via the gas supply 116.
  • the air supply 112 includes a fan 114 that may be operated with an adaptable fan speed and/or within predetermined ranges of fan speeds to draw air into the air-gas mixing unit 110.
  • the air supply 112 and the gas supply 116 are interconnected via a plurality of air-gas mixers 118 of the air-gas mixing unit 110.
  • Each one of the plurality of air-gas mixers 118 forms an associated discrete point of mixing 119.
  • the combustible air-gas mixture 130 is formed at all such discrete points of mixing 119 from a respective air flow 140 supplied via the air supply 112 and a respective gas flow 150 supplied via the gas supply 116.
  • the combustible air-gas mixture 130 is then guided via the plurality of air-gas mixers 118 to the burning unit 120.
  • the burning unit 120 is provided with a burner surface 124 that is arranged downstream of the air-gas mixing unit 110 such that the combustible air-gas mixture 130 that is formed at the points of mixing 119 flows towards the burner surface 124.
  • the combustible air-gas mixture 130 is burned by the burning unit 120 and, more specifically, at the burner surface 124.
  • the burner surface 124 is illustrated with a comparatively small flame 122 which occurs e.g. at a low firing rate of the air-gas mixing unit 110, i.e. at a comparatively low rate at which feed of the combustible air-gas mixture 130 from the air-gas mixing unit 110 to the burning unit 120 occurs, in terms of volume, heat units, or weight per unit time.
  • a low firing rate may e.g. be applied to the air-gas mixing unit 110 during an ignition phase of the air-gas mixture burning appliance 100.
  • Fig. 2 shows the air-gas mixing unit 110 of Fig. 1 with the plurality of air-gas mixers 118.
  • the plurality of air-gas mixers 118 is provided for mixing of air supplied by means of the air flow 140 and gas supplied by means of the gas flow 150 via the gas supply 116 at respective points of mixing 119 in order to form the combustible air-gas mixture 130.
  • the plurality of air-gas mixers 118 is arranged inside a housing 205.
  • each one of the plurality of air-gas mixers 118 is embodied as a Venturi-type mixing nozzle.
  • a single air-gas mixer of the plurality of air-gas mixers 118 is individually labelled in Fig. 2 with the reference sign 218.
  • This single air-gas mixer 218 is hereinafter described representative for all air-gas mixers of the plurality of air-gas mixers 118, which are preferably embodied identically, at least within predetermined manufacturing tolerances and with respect to an underlying functioning.
  • a detailed description of each one of the plurality of air-gas mixers 118 may be omitted for brevity and conciseness.
  • each one of the plurality of air-gas mixers 118 has an air inlet 240 and a combustible air-gas mixture outlet 250. Furthermore, the air-gas mixer 218 and, thus, each one of the plurality of air-gas mixers 118 is connected to the gas supply 116 such that the gas flow 150 is guided from the gas supply 116 to the point of mixing 119 that is associated with the air-gas mixer 218. Preferably, the air-gas mixer 218 and, thus, each one of the plurality of air-gas mixers 118 is preferentially connected at its inlet side, illustratively at the air inlet 240, to a manifold 202. If each one of the plurality of air-gas mixers 118 is embodied as a Venturi-type mixing nozzle, then the manifold 202 may be embodied as a so-called "Venturi-plate".
  • the plurality of air-gas mixers 118 is at least partially surrounded by a slot 210.
  • the slot 210 is formed inside, and at least partly along the housing 205, i.e. close to a respective housing wall.
  • the slot 210 is formed in the manifold 202.
  • the slot 210 faces the air flow 140.
  • the slot 210 is connected to an associated plenum chamber 220.
  • the plenum chamber 220 is preferably connected to an air pressure signal port 230.
  • plenum chamber 220 provision of the plenum chamber 220 is not mandatory and may also be omitted.
  • a corresponding embodiment of the air-gas mixing unit 110 without the plenum chamber 220 is described below at Figure 6 .
  • a particular location of the plenum chamber 220 may vary, as e.g. described below at Fig. 5 .
  • Fig. 3 shows the air-gas mixing unit 110 of Fig. 1 with the plurality of air-gas mixers 118.
  • the plurality of air-gas mixers 118 is arranged inside the housing 205 and connected to the manifold 202.
  • the slot 210 of the air-gas mixing unit 110 is further illustrated.
  • the slot 210 completely surrounds the plurality of air-gas mixers 118.
  • the slot 210 is formed in the manifold 202 and arranged inside, and at least partly along the housing 205.
  • Fig. 4 shows the air-gas mixture burning appliance 100 of Fig. 1 with the air-gas mixing unit 110, the air supply 112, and the gas supply 116 for further illustrating the functionality of the air-gas mixture burning appliance 100.
  • illustration of the burning unit 120 is omitted.
  • the air-gas mixing unit 110 is embodied as described above at Fig. 2 and Fig. 3 and comprises the plurality of air-gas mixers 118 that is arranged inside the housing 205 and connected to the manifold 202 having the slot 210.
  • the housing 205 connects the air-gas mixing unit 110 to the air supply 112 and forms a common air way 412 for the air flow 140 toward the manifold 202, for supply of air to the plurality of air-gas mixers 118.
  • the air flow 140 is also supplied to the slot 210, which encompasses at least partially the common airway 412 More specifically, the slot 210 faces into the air flow 140 which is directed via the common airway 412 toward the plurality of air-gas mixers 118.
  • the slot 210 is connected to a gas governor 410 via the air pressure signal port 230 which is configured to provide an air pressure signal 430 from the slot 210 to the gas governor 410.
  • the air pressure signal 430 is provided from the slot 210 via the plenum chamber 220 to the gas governor 410.
  • the plenum chamber 220 is preferably provided to allow stable and undisturbed measurement of static air pressure in the air-gas mixing unit 110 such that the air pressure signal 430 represents at least essentially the mean static air pressure experienced by all air-gas mixers of the plurality of air-gas mixers 118.
  • the gas governor 410 is adapted to control supply of gas to the plurality of air-gas mixers 118 dependant on the air pressure signal 430 that is indicative of the static air pressure in the common air way 412 and, thus, in the air-gas mixing unit 110.
  • the gas governor 410 controls an incoming gas flow 420 on the basis of the air pressure signal 430 to generate the gas flow 150.
  • each one of the plurality of air-gas mixers 118 is preferably configured to restrict the gas flow 150 supplied from the gas governor 410 upstream of the point of mixing 119 where the gas flow 150 is combined with the air flow 140 which is directed via the common air way 412 toward the plurality of air-gas mixers 118.
  • Fig. 5 shows the air-gas mixing unit 110 of Fig. 1 with the plurality of air-gas mixers 118 that are provided for mixing of air supplied by means of the air flow 140 and gas supplied by means of the gas flow 150 via the gas supply 116 at respective points of mixing 119 in order to form the combustible air-gas mixture 130.
  • the plurality of air-gas mixers 118 is illustratively arranged inside the housing 205 and connected to the manifold 202 having the slot 210 and the plenum chamber 220, which is connected to the air pressure signal port 230.
  • the housing 205 forms the common air way 412 of Fig. 4 for the air flow 140 toward the manifold 202 for supply of air to the plurality of air-gas mixers 118.
  • the plenum chamber 220 is now connected to the slot 210 via a first plenum opening 510 and to the air pressure signal port 230 via a second plenum opening 520, wherein the second plenum opening 520 is arranged closer to the common airway 412 than the first plenum opening 510.
  • the second plenum opening 520 is illustratively above the first plenum opening 510 in order to provide an enhanced stability and accuracy in reading of the air pressure signal (430 in Fig. 4 ), thus, allowing the air pressure signal (430 in Fig. 4 ) to be more representative of the true average static air pressure in the common air way 412, i.e. of all air-gas mixers of the plurality of air-gas mixers 118.
  • Fig. 6 shows the air-gas mixing unit 110 of Fig. 1 with the plurality of air-gas mixers 118 that are provided for mixing of air supplied by means of the air flow 140 and gas supplied by means of the gas flow 150 via the gas supply 116 at respective points of mixing 119 in order to form the combustible air-gas mixture 130.
  • the plurality of air-gas mixers 118 is arranged inside the housing 205 and connected to the manifold 202 having the slot 210 and the air pressure signal port 230.
  • the slot 210 is now directly connected to the air pressure signal port 230.
  • provision of the plenum chamber 220 is omitted.
  • the slot 210 now extends relative to a flow direction of the combustible air-gas mixture 130 to such an extent that the air pressure signal port 230 is located entirely downstream of, i.e. illustratively below the respective points of mixing 119.
  • Fig. 6 further illustrates an exemplary width 610 of the slot 210.
  • the width 610 ranges between 1mm and 9mm.
  • the width 610 is only shown in Fig. 6 , it preferably applies to all embodiments described above at Fig. 1 to Fig. 6 .

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

Claims (9)

  1. Appareil de combustion de mélange air-gaz (100), comprenant :
    une unité de mélangeage gaz-air (110) avec une pluralité de mélangeurs gaz-air (118) pour le mélangeage d'air et de gaz pour former un mélange air-gaz combustible (130),
    une alimentation en air (112) qui est raccordée à l'unité de mélangeage gaz-air (110) et comprend un passage d'air commun (412) pour l'alimentation en air à la pluralité de mélangeurs gaz-air (118),
    une alimentation en gaz (116) pour effectuer l'alimentation en gaz à l'unité de mélangeage gaz-air (110), et
    un régulateur de gaz (410) qui est adapté pour commander l'alimentation en gaz à la pluralité de mélangeurs gaz-air (118) en fonction d'un signal de pression d'air (430) qui est indicatif d'une pression d'air statique dans le passage d'air commun (412),
    dans lequel la pluralité de mélangeurs gaz-air (118) est au moins partiellement entourée par une fente (210) qui englobe au moins partiellement le passage d'air commun (412), et
    dans lequel la fente (210) est reliée au régulateur de gaz (410) par l'intermédiaire d'un orifice de signal de pression d'air (230) qui est configuré pour fournir le signal de pression d'air (430) depuis la fente au régulateur de gaz (410).
  2. Appareil de combustion de mélange air-gaz selon la revendication 1, dans lequel la fente (210) est reliée à l'orifice de signal de pression d'air (230) par l'intermédiaire d'une chambre de distribution associée (220).
  3. Appareil de combustion de mélange air-gaz selon la revendication 2, dans lequel la chambre de distribution (220) est reliée à la fente (210) par l'intermédiaire d'une première ouverture de distribution (510), dans lequel la chambre de distribution (220) est reliée à l'orifice de signal de pression d'air (230) par l'intermédiaire d'une seconde ouverture de distribution (520), et dans lequel la seconde ouverture de distribution (520) est agencée plus près du passage d'air commun (412) que la première ouverture de distribution (510).
  4. Appareil de combustion de mélange air-gaz selon l'une quelconque des revendications précédentes, dans lequel la fente (210) fait face à un écoulement d'air (140) qui est dirigé par l'intermédiaire du passage d'air commun (412) vers la pluralité de mélangeurs gaz-air (118).
  5. Appareil de combustion de mélange air-gaz selon l'une quelconque des revendications précédentes, dans lequel la pluralité de mélangeurs gaz-air (118) est agencée à l'intérieur d'un logement (205), et dans lequel la fente (210) est formée à l'intérieur, et au moins partiellement le long du logement (205).
  6. Appareil de combustion de mélange air-gaz selon l'une quelconque des revendications précédentes, dans lequel chacun de la pluralité de mélangeurs gaz-air (118) est relié, sur un côté d'entrée respectif (240), à un collecteur (202), et dans lequel la fente (210) est formée dans le collecteur (202).
  7. Appareil de combustion de mélange air-gaz selon l'une quelconque des revendications précédentes, dans lequel chacun de la pluralité de mélangeurs gaz-air (118) est configuré pour limiter un écoulement de gaz (150) fourni depuis le régulateur de gaz (410) en amont d'un point associé de mélangeage (119) où l'écoulement de gaz (150) est associé à un écoulement d'air (140) qui est dirigé par l'intermédiaire du passage d'air commun (412) vers la pluralité de mélangeurs gaz-air (118).
  8. Appareil de combustion de mélange air-gaz selon la revendication 7, dans lequel la fente (210) s'étend relativement à une direction d'écoulement du mélange air-gaz combustible (130) de manière telle que l'orifice de signal de pression d'air (230) soit situé entièrement en aval du point associé de mélangeage (119).
  9. Appareil de combustion de mélange air-gaz selon l'une quelconque des revendications précédentes, dans lequel la fente (210) a une largeur (610) qui varie entre 1 mm et 9 mm.
EP21193437.7A 2020-09-23 2021-08-27 Appareil de combustion de mélange doté d'un régulateur de gaz Active EP3974720B1 (fr)

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GB2015055.3A GB2599629A (en) 2020-09-23 2020-09-23 An air-gas mixture burning appliance with a gas governor

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3268668B1 (fr) * 2015-03-11 2020-07-15 Tre P Engineering S.r.l. Plaque de cuisson ventilée à gaz domestique prémélangé

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Publication number Priority date Publication date Assignee Title
CN2434553Y (zh) * 2000-07-11 2001-06-13 上海天行机电设备成套公司 一种新型燃气/空气预混装置
US6390806B1 (en) * 2001-09-28 2002-05-21 Carrier Corporation Pneumatic system for flame rollout and draft safeguard protection
WO2005095870A1 (fr) * 2004-03-03 2005-10-13 Beckett Gas, Inc. Four
US7494337B2 (en) * 2004-04-22 2009-02-24 Thomas & Betts International, Inc. Apparatus and method for providing multiple stages of fuel
CN107676981A (zh) * 2017-08-31 2018-02-09 芜湖鸣人热能设备有限公司 热水炉用文丘里混合器
JP7126685B2 (ja) * 2018-05-24 2022-08-29 株式会社パロマ 燃焼装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3268668B1 (fr) * 2015-03-11 2020-07-15 Tre P Engineering S.r.l. Plaque de cuisson ventilée à gaz domestique prémélangé

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EP3974720A1 (fr) 2022-03-30
GB2599629A (en) 2022-04-13
GB202015055D0 (en) 2020-11-04

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