EP0606527A1 - Appareil de combustion à gaz avec un brûleur atmosphérique et procédé de régulation de l'air dans l'appareil - Google Patents

Appareil de combustion à gaz avec un brûleur atmosphérique et procédé de régulation de l'air dans l'appareil Download PDF

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Publication number
EP0606527A1
EP0606527A1 EP93113075A EP93113075A EP0606527A1 EP 0606527 A1 EP0606527 A1 EP 0606527A1 EP 93113075 A EP93113075 A EP 93113075A EP 93113075 A EP93113075 A EP 93113075A EP 0606527 A1 EP0606527 A1 EP 0606527A1
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EP
European Patent Office
Prior art keywords
primary air
temperature
gas
combustion chamber
air
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Application number
EP93113075A
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German (de)
English (en)
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EP0606527B1 (fr
Inventor
Enrico Sebastiani
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Individual
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Priority to US08/199,105 priority Critical patent/US5667375A/en
Publication of EP0606527A1 publication Critical patent/EP0606527A1/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
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/045—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with a plurality of burner bars assembled together, e.g. in a grid-like arrangement
    • 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
    • F23N1/027—Regulating fuel supply conjointly with air supply using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/04—Regulating fuel supply conjointly with air supply and with draught
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/04—Measuring pressure
    • F23N2225/06—Measuring pressure for determining flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F23N2225/16—Measuring temperature burner temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/02—Ventilators in stacks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/02—Air or combustion gas valves or dampers
    • F23N2235/06—Air or combustion gas valves or dampers at the air intake
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2237/00—Controlling
    • F23N2237/16—Controlling secondary air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel

Definitions

  • This invention relates to gaseous fuel combustion apparatus, and in particular to a method for feeding an apparatus which incorporates a burner of the atmospheric type, and to an apparatus implementing the method.
  • the invention is applicable especially to apparatus with a hyperstoichiometric premix burner, that is wherein air is admixed to the gas inside the burner in larger amounts than the required amount for stoichiometric combustion.
  • the apparatus comprises, additionally to the atmospheric burner, a combustion chamber and means for creating a vacuum within the combustion chamber relatively to the nozzle area.
  • the burner has gas outflow nozzles, suction and mixing ducts coaxial with the nozzles, and diffusers communicated to the ducts for delivering the gas/primary air mixture into the combustion chamber.
  • the apparatus further comprises a box-type structure connected to the combustion chamber and enveloping the suction and mixing ducts.
  • That structure has a wall laid across between the nozzles and the ducts, and for each nozzle, an intake opening wherethrough primary air is drawn into the ducts and secondary air intake openings adjacent to the primary air intake opening.
  • the streams of primary air and secondary air through their respective openings flow along parallel directions to each other.
  • the apparatus just outlined provides for uniform and complete combustion of the gas using extremely simple constructional expedients. However, it may still develop ignition problems, i.e. at the start of its operation, and where instead of the standard gas for which the apparatus is set, a gas prone on flame separation from the same family as said standard gas or a so-called “poor-combustion” gas or a so-called “backfiring” gas from the same family are used. Specifically, the diffuser temperature may occasionally attain a critical danger value, and on some other occasions, the flame may become unstable, resulting in poor combustion of the fuel gas. Such problems are felt the more heavily when the premixing of air to the gas is raised above that required for stoichiometric combustion in order to cut down harmful emissions.
  • the apparatus shown in Figure 1 comprises an atmospheric burner 10, a combustion chamber 11, a heat exchanger 12, and a fan 13, all accommodated inside a compartment 14 which extends vertically in this instance.
  • the burner as shown best in Figure 2, comprises a duct 15 having a square cross-sectional shape and being shown with a wall removed, which duct is connected through a fitting 16 to a gas supply and carries a plurality of nozzles 17 which extend from the duct parallel to one another.
  • a duct 18 of metal construction in the form of a venturi having its inlet end placed a set distance away from the nozzle and, in this instance, coaxial with the nozzle for drawing in primary air and admixing it to the gas outflow from the nozzle.
  • Each venturi 18 directs the gas/primary air mixture, through a connection channel 18', into a diffusing box-type member 19 which has plural openings 20 across its side facing toward the combustion chamber.
  • venturis, the openings 25, and more generally all the physical and constructional parameters of the apparatus are selected such that the primary air will be admixed to the fuel gas in varying amounts to suit individual requirements and/or the power output, from values substantially equal to the amounts required for stoichiometric combustion of the gas up to values exceeding these amounts by 50 to 60%.
  • venturis 18, their respective connection channels 18', and the diffusers 19 are, as can be seen, arranged in structurally alike sets laid side-by-side some distance apart and with the perforated sides of the diffusers 19 in one plane to form a bed, extending horizontally in this instance, whence the flames will issue.
  • the bottom portion of the burner 10 is enclosed within a box-type structure 23, shown with a portion thereof removed in Figure 2, which has its edges matching the walls of the combustion chamber 11 and a wall 24 extending between the nozzles 17 and the venturis transversely of the axes of the latter.
  • This wall is formed, at the location of each nozzle, with a circular opening 25 and some smaller adjacent openings shown at 26.
  • primary air AP is drawn into the respective venturis through the openings 25.
  • the additional openings 26 locate outside the areas facing toward the intake ports of the venturis 18, but proximate to the areas where the entraining action is applied to the gas streams issuing from the nozzles 17 and air is accordingly drawn into the venturis.
  • the secondary air AS can only be drawn into the combustion chamber through said additional openings.
  • the primary air AP and secondary air AS streams as indicated by arrows in the drawing, flow substantially parallel to each other at the inlet end of the box-type structure 23.
  • FIG. 3A Shown in Figure 3A, where similar or corresponding parts to those in Figure 1 are denoted by the same reference numerals, is an apparatus according to the invention with some of its components generally represented by functional blocks. Shown at 13' therein is the conneection to a flue. It is understood, however, that the invention would also apply to an embodiment employing a fan as in the prior apparatus according to Figure 1.
  • the burner 10 bottom here is not enclosed within a box-type structure as is that shown at 23 in Figure 1, but it is understood that the invention could also be applied to burner arrangements providing that structure. Further, the following description will make reference to a burner having a single nozzle 17 and a single venturi associated therewith which is contained in a corresponding box-type diffuser member 19, but it is understood that the burner could be a multiple nozzle burner with corresponding venturis and diffusers, similar to that described in relation to Figure 1. It will be appreciated, in fact, that the invention may also apply to multiple nozzle embodiments with a few simple adaptations well within the capabilities of the skilled ones.
  • a sleeve 58 is provided around the nozzle 17 which is slidable over the nozzle by means of a rod 51 which is attached with one end to the sleeve and carries, on the other end, a rack 52 for engagement by a pinion gear 53 keyed to a shaft of an electric motor 54.
  • the latter may be a step motor and is powered through a processing and control unit, generally represented by a block 55.
  • a pressure sensor 56 is connected to the gas supply duct 15 to detect the flow rate of the gas issuing from the nozzle 17 and send a corresponding electric signal, denoted by G, to the unit 55.
  • a temperature sensor 57 such as a thermistor, is mounted on the surface of the diffuser 19, or close to it, and provides a measurement of the temperature detected by the unit 55.
  • the unit 55 is also applied a temperature T1 reference which is set through a control device 59, such as a manually operated preselector.
  • the burner will have been set for ideal operation on a standard gas from a family of fuel gases, e.g. on town gas (pure methane) from the family of "natural" gases.
  • the sliding sleeve 58 is moved toward the venturi 18 such that on ignition, by altering the gas jet from the nozzle 17, the amount of primary air AP drawn in will have a comparatively low starting value. In this way, a gas/air mixture is obtained which is favorable to combustion with the burner still cold or on its way to become heated.
  • the reference value for temperature T1 is set to provide optimum combustion of standard gas. For instance, T1 would be set at a value which corresponds to a temperature within the range of 250 to 450°C at the diffuser surface.
  • the temperature measured is compared continuously with the reference value, and the result of the comparison is used by the unit 55 to generate a control signal to the motor 54.
  • the latter is powered through the unit 55 to drive the sleeve 58 away from the port of the venturi 18 to a position where the flow of primary air AP is appropriate to establish a desired temperature at the diffuser.
  • a gas which is prone on flame separation same as the family to which the standard gas belongs, e.g. the gas known as G25
  • the desired temperature will be attained at the diffuser with a lower primary air flow rate than that required for the standard gas, that is with the sleeve 58 set closer to the port of the venturi 18.
  • a poor-combustion gas is supplied such as the gas known as G21, the primary air flow rate will be increased, that is the sleeve 58 moved further away from the port of the venturi 18.
  • the primary air flow rate for attaining the desired temperature at the diffuser will be slightly lower than that required for the poor-combustion gas.
  • the signal G from the pressure sensor 56 is processed by the unit 55 to adjust the control signal applied to the motor 54 in accordance with the flow rate of the gas issuing from the nozzle 17. For many applications, such as with the ON/OFF power control of the apparatus described hereinafter, this adjustment is unimportant and the pressure sensor 56 and processing circuit for the flow rate signal may be omitted.
  • measuring other temperatures in the apparatus may prove useful, such as the temperature inside the combustion chamber.
  • temperature signals can be processed by the unit 55 using a predetermined procedure effective to ensure optimum gas combustion under any of the feed conditions by control of the primary air, and optionally of the secondary air. It should be considered, moreover, that even where large passages are provided for the secondary air, the latter may be absent altogether if the intake of primary air is made particularly easy.
  • FIG. 3B Shown in Figure 3B is a variation of the apparatus according to the invention, wherein the control is of the ON/OFF type rather than continuous.
  • a solenoid, shown at 54', is used here as the actuator whose drive rod 51' is attached to the sleeve 58'.
  • the pressure sensor 56 is not provided in this arrangement, and the processing and control unit is designed to generate a control signal which can have but two values, namely first and second values according to whether the detected temperature is higher or lower, respectively, than the reference temperature T1.
  • the solenoid is de-energized or energized, respectively, whereby the sleeve 58' will respectively locate in a first position close to the port of the venturi 18 or a second position further away from said port when the detected temperature is lower or higher, respectively, than the predetermined temperature.
  • the drive rod of the solenoid 54' is connected to the nozzle holding duct 15' pivotally about a pivot pin 60.
  • the duct 15' is not attached fixedly to the apparatus structure as in the arrangements of Figures 3A and 3B, but rather in a pivotal fashion about an orthogonal axis to the plane of the sheet, as indicated at 61.
  • said axis is the longitudinal axis of the duct 15'; however, it may be arranged to lie off-center to alter the primary air flow change according to a predetermined operation criterion.
  • the adjustment being also of the ON/OFF type, has for its effect that the nozzle is moved between two stable positions, namely a position where the nozzle 17 has its axis coincident with the axis of the venturi 18 and another position where the axis of the nozzle 17 is shifted by a predetermined angle from the venturi axis.
  • the nozzle off-centering results in decreased flow of the primary air entrained by the gas jet through the venturi, similar to the effect to be obtained with the control shown in Figures 3A and 3B.
  • this method of varying the primary air flow can be also used for a continuous type of control, as described in connection with Figure 3A.
  • a device may be arranged to use the temperature measurement from the sensor 57 to block the gas flow at the nozzle 17 upon the temperature approaching danger values.
  • FIG 4 where similar or corresponding parts to those in Figure 1 are denoted by the same reference numerals, there is shown an apparatus according to the invention which employs a burner with angled venturis from the horizontal. It is understood, however, that the invention may also be used to advantage with apparatus equipped with burners like that shown in Figure 1 or any other burner of the atmospheric type having its intake and mixing duct(s) enclosed within a case incorporating the diffuser.
  • the bottom wall of the box-type structure 23 has an additional opening 30, a circular one in this instance, and a means of controlling the flow of air through that opening.
  • said means comprises a closure member in the form of a circular metal plate 31 adapted to overlap the edges of the control opening 30 and being supported centrally on a rod 32, an element responsive to the temperature inside the combustion chamber, in the form of a metal rod 33 penetrating the combustion chamber 14 and part of the box-type structure 23, and actuator members, in this case in the form of a lever 34 pivoted to a point 35 on a bracket attached to the structure 23, connected pivotally both to the end of the rod 33 and the pin 32.
  • the circular plate 31 is slidable upwards along the rod 32 against the bias force of a compression spring 32, and is held down by a ring 37 attached to the rod 32.
  • the various elements are arranged and sized such that, with the burner turned off, the closure plate 31 will locate some distance off the bottom wall of the box-type structure, thereby allowing an abundant amount of secondary air AS to be drawn through the control opening 30.
  • the large flow of secondary air thus provided results in the flow of primary air being decreased with respect to that provided for steady-state combustion of the standard gas, i.e. of the gas for which the burner is set, so that the pre-mixing rate will be relatively low and no flame separation will occur even when a gas prone on flame separation is used.
  • the plate 31 is moved down by the lever 34 operated by the rod, thereby reducing the secondary air passage cross-section through the additional opening 30.
  • the opening 30 is shut off completely, and the flow of secondary air is limited to that going through the openings 26 in the wall 24, that is an optimum flow for thorough combustion of the standard gas in steady-state operation. Any further expansion of the rod 33 would have no effect on the closure plate 31 because the rod 33 is allowed to slide therein against the spring 36.
  • the additional opening may be left open partway, if the predetermined temperature is not attained in the combustion chamber with such gases.
  • the ratio of primary air to secondary air can be controlled even during normal combustion, particularly in the modulation instance, when the feed to the burner is cut down to limit the thermal power output.
  • the dimensions and arrangements of the control device elements can be selected such that the expansion of the rod 33, in turn proportional to the combustion chamber temperature, will control the secondary air passage cross-section through the additional opening 30 to ensure the best ratio of primary air to secondary air under any conditions.
  • the most convenient location of the additional opening is, for this purpose, close against the intakes of the venturis.
  • the apparatus differs from the previously described one by that the pivot 35 for the lever 34 is not fixed on the box-type structure 23, but positioned on the rod 38 of a pressure transducer in the form of a diaphragm-operated pressure sensor generally indicated at 39.
  • the rod 38 is rigid with a diaphragm 40 which divides the pressure sensor into two compartments and is loaded by a compression spring 41 in the bottom compartment, which is communicated to the outside through a passageway 42 provided in the wall of the structure 23.
  • the top compartment of the pressure sensor is connected by a pipe 43 to the gas duct 15, so that the gas pressure will act on the diaphragm 40 against the action of the spring 41.
  • the height of the pivot 35 will depend on the gas pressure within the duct 15, and hence on the gas flow rate to the nozzles, so that the relationship of the combustion chamber temperature to the secondary air passage cross-section through the opening 30 can be altered according to the gas flow rate.
  • lower flows result in the opening 30 being shut off completely at lower combustion chamber temperatures.
  • the amount of primary air which is drawn in toward the combustion chamber is controlled by controlling the overall amount of air admitted into the apparatus, e.g. by reducing the vacuum within the combustion chamber with respect to the area of the nozzles. This may be accomplished by either decreasing the speed of the fan 13 in the apparatus shown in Figure 1, or by shutting a gate in the outgoing smoke path where the apparatus includes a flue, or opening a bypass in the air path.
  • the duct, indicated at 50, which directs the exhaust gases to the fan 13 and hence to the apparatus outlet, is provided with an opening 30' having, in this case, a circular shape, which communicates that duct to the apparatus outside, specifically to the duct through which the air for the burner operation is drawn in.
  • a circular metal plate 31' adapted to overlap the edges of the opening 30' and being supported centrally on a rod 32' constitutes a closure member for the opening.
  • a metal rod 33' penetrating the combustion chamber 14 and the heat exchanger 12 constitutes an element responsive to the internal temperature of the combustion chamber and is coupled to the plate 31' by actuator members, in this case in the form of a lever 34'.
  • the circular plate 31' is slidable upwards along the rod 32' against the bias force of a compression spring 36' disposed around the rod 32' and is held down by a ring 37' attached to the rod 32'.
  • the intermediate pivot for the lever 34' located at 35'', locates on the output rod 38' of a diaphragm-operated pressure sensor, generally shown at 39', which is rigid with the box-type structure 23. That rod 38' is rigid with a diaphragm 40' which divides the pressure sensor into two compartments and is loaded by a compression spring 41' in the top compartment, which is communicated to the outside by a passageway 42'.
  • the bottom compartment of the pressure switch is connected by a pipe 43' to the gas duct 15, whereby the gas pressure will act on the diaphragm 40' against the action of the spring 41'.
  • the height of the pivot 35'' is, therefore, dependent on the gas pressure within the duct 15, and hence on the gas flow rate to the nozzles.
  • the air passage cross-section of the opening 30' is controlled according to the combined actions of the rod 33' expansion, and hence the combustion chamber temperature, and the position of the pivot 35'', and hence the gas flow rate.
  • the mutual arrangement of the various elements in this embodiment is such that lower flow rates result in the opening 30' being shut off completely at lower combustion chamber temperatures, but in different embodiments, it may prove convenient to control the combined action of the temperature and flow rate detectors otherwise.
  • control of the primary air AP is achieved by controlling the overall flow rate of the intake air to the burner through the vacuum created by the fan 13, and in conclusion optimum combustion control, both at the ignition stage and when using gases prone on flame separation, by controlling the response and mutual action of the element responsive to the combustion chamber temperature and the gas flow rate detector.
  • the primary air is controlled by changing the cross-section of one or more of the openings through which the secondary air is flowed during steady-state operation; that is, no special control opening is provided.
  • the secondary air during steady-state operation is drawn into the box-type structure through one or more openings provided at locations other than those shown in the apparatus of Figures 4 to 6.
  • the temperature responsive elements may be, rather than thermistors or metal rods as in the examples described in the foregoing, thermocouples, bimetallic strips, or some other devices fitted inside the combustion chamber or attached to the diffusers
  • the flow rate detectors may be, rather than pressure sensors, pitot tubes, hot wire detectors, etc.
  • the actuator members may be, rather than motors or purely mechanical members, solenoids, wax expansion actuators, bimetallic strip actuators, or else.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Gas Burners (AREA)
EP93113075A 1993-01-15 1993-08-16 Appareil de combustion à gaz avec un brûleur atmosphérique et procédé de régulation de l'air dans l'appareil Expired - Lifetime EP0606527B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US08/199,105 US5667375A (en) 1993-08-16 1994-02-22 Gas combustion apparatus and method for controlling the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI930048 1993-01-15
ITMI930048A IT1263759B (it) 1993-01-15 1993-01-15 Apparecchio per la combustione di gas con un bruciatore atmosferico a premiscelazione iperstechiometrica e metodo per la regolazione dell'aria aspirata particolarmente in fase di accensione

Publications (2)

Publication Number Publication Date
EP0606527A1 true EP0606527A1 (fr) 1994-07-20
EP0606527B1 EP0606527B1 (fr) 1997-09-24

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ID=11364651

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93113075A Expired - Lifetime EP0606527B1 (fr) 1993-01-15 1993-08-16 Appareil de combustion à gaz avec un brûleur atmosphérique et procédé de régulation de l'air dans l'appareil

Country Status (5)

Country Link
EP (1) EP0606527B1 (fr)
AT (1) ATE158646T1 (fr)
DE (1) DE69314153T2 (fr)
IT (1) IT1263759B (fr)
RU (1) RU2129236C1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0657691A1 (fr) * 1993-11-10 1995-06-14 Worgas Bruciatori S.R.L. Elément mélangeur et diffuseur pour un brûleur atmosphérique
FR2730793A1 (fr) * 1995-02-16 1996-08-23 Leblanc Sa E L M Perfectionnements apportes a un bruleur de chauffe-eau, chauffe-bain, chaudiere a gaz
EP0981020A2 (fr) * 1998-08-14 2000-02-23 Lochinvar Corporation Appareil de chauffage comportant plusieurs étages
WO2008025783A2 (fr) * 2006-08-31 2008-03-06 Nv Bekaert Sa Appareil de chauffage autonome d'entretien facile, résistant aux inflammations de vapeurs inflammables et émettant de faibles taux de nox et de co
ITMI20130013A1 (it) * 2013-01-08 2014-07-09 Nordgas S R L Dispositivo di regolazione e controllo fiamma per bruciatori premiscelati.

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Publication number Priority date Publication date Assignee Title
IT1406865B1 (it) * 2011-01-12 2014-03-14 Worgas Bruciatori Srl Bruciatore ad elevata stabilita' perimetrale
RU2493488C1 (ru) * 2012-03-07 2013-09-20 Общество с ограниченной ответственностью Научно-Инновационное предприятие СКГМИ (ГТУ) "Стройкомплект-Инновации" ООО НИП СКГМИ Способ оптимизации процесса горения топлива
US10151479B2 (en) * 2013-11-22 2018-12-11 Lennox Industries Inc. Burner assembly
RU2596081C1 (ru) * 2015-02-27 2016-08-27 Алексей Алексеевич Сердюков Горелка диффузионно-кинетическая
CN105570893B (zh) * 2015-12-28 2018-04-10 广州迪森家用锅炉制造有限公司 燃气燃烧器
RU2618137C1 (ru) * 2016-04-20 2017-05-02 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный архитектурно-строительный университет" (ФГБОУ ВПО "СПбГАСУ") Инжекционная горелка низкого давления

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2631718A1 (de) * 1975-07-28 1977-02-10 Leblanc Sa E L M Gasbeheizter warmwasserbereiter mit gasdichtem abzug
DE3918855A1 (de) * 1989-01-21 1990-08-02 Hydrotherm Geraetebau Gmbh Gasgeblaesebrenner
DE4207814A1 (de) * 1991-03-12 1992-09-17 Vaillant Joh Gmbh & Co Vormischgasbrenner

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2631718A1 (de) * 1975-07-28 1977-02-10 Leblanc Sa E L M Gasbeheizter warmwasserbereiter mit gasdichtem abzug
DE3918855A1 (de) * 1989-01-21 1990-08-02 Hydrotherm Geraetebau Gmbh Gasgeblaesebrenner
DE4207814A1 (de) * 1991-03-12 1992-09-17 Vaillant Joh Gmbh & Co Vormischgasbrenner

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0657691A1 (fr) * 1993-11-10 1995-06-14 Worgas Bruciatori S.R.L. Elément mélangeur et diffuseur pour un brûleur atmosphérique
FR2730793A1 (fr) * 1995-02-16 1996-08-23 Leblanc Sa E L M Perfectionnements apportes a un bruleur de chauffe-eau, chauffe-bain, chaudiere a gaz
EP0981020A2 (fr) * 1998-08-14 2000-02-23 Lochinvar Corporation Appareil de chauffage comportant plusieurs étages
EP0981020A3 (fr) * 1998-08-14 2000-03-22 Lochinvar Corporation Appareil de chauffage comportant plusieurs étages
WO2008025783A2 (fr) * 2006-08-31 2008-03-06 Nv Bekaert Sa Appareil de chauffage autonome d'entretien facile, résistant aux inflammations de vapeurs inflammables et émettant de faibles taux de nox et de co
WO2008025783A3 (fr) * 2006-08-31 2008-04-24 Bekaert Sa Nv Appareil de chauffage autonome d'entretien facile, résistant aux inflammations de vapeurs inflammables et émettant de faibles taux de nox et de co
ITMI20130013A1 (it) * 2013-01-08 2014-07-09 Nordgas S R L Dispositivo di regolazione e controllo fiamma per bruciatori premiscelati.

Also Published As

Publication number Publication date
ITMI930048A0 (it) 1993-01-15
RU2129236C1 (ru) 1999-04-20
IT1263759B (it) 1996-08-29
DE69314153T2 (de) 1998-04-23
ITMI930048A1 (it) 1994-07-15
EP0606527B1 (fr) 1997-09-24
ATE158646T1 (de) 1997-10-15
DE69314153D1 (de) 1997-10-30

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