EP0635679B1 - Einspritz- und Regelvorrichtung für atmosphärische Gasbrenner von Heizgeräte, insbesondere der Infrarottyp - Google Patents

Einspritz- und Regelvorrichtung für atmosphärische Gasbrenner von Heizgeräte, insbesondere der Infrarottyp Download PDF

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EP0635679B1
EP0635679B1 EP94202045A EP94202045A EP0635679B1 EP 0635679 B1 EP0635679 B1 EP 0635679B1 EP 94202045 A EP94202045 A EP 94202045A EP 94202045 A EP94202045 A EP 94202045A EP 0635679 B1 EP0635679 B1 EP 0635679B1
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Prior art keywords
injector
injection
gas
valve
stage
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English (en)
French (fr)
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EP0635679A1 (de
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Joseph Strand
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Centre dEtude et de Realisations dEquipment et de Materiel CEREM
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Centre dEtude et de Realisations dEquipment et de Materiel CEREM
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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, 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
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/007—Regulating fuel supply using mechanical means
    • 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
    • F23D2900/14642—Special features of gas burners with jet mixers with more than one gas injection nozzles or orifices for a single mixing tube
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/16—Fuel valves variable flow or proportional valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/18—Groups of two or more valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/20—Membrane valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/24—Valve details
    • 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 invention relates to a device injection and regulation between a minimum power, called idling, and a maximum power, called nominal, for atmospheric gas burner for heating appliances, in particular of the infrared type, comprising a pipe air inlet with an air inlet mouth and of a Venturi element.
  • This device is also of the type comprising gas injection means connected to gas supply pipe means, arranged in the air supply line from each burner, upstream of the Venturi element, and means for regulating the quantity of gas delivered to the injection means.
  • a such a device is, moreover, particularly suitable for equip heating appliances called to operate at low nominal pressure.
  • the burners operating at low pressure i.e. at a pressure generally less than 500 mbar, are affected by a deterioration in the quality of combustion if the supply pressure drops below the value nominal for which they were designed.
  • low pressure is, for example, a device operating at a nominal pressure of 350 mbar for which the intake of aspirated air and the injection of gas delivered by the injector do not remain proportional to a pressure range falling below 50% of the nominal speed.
  • the present invention aims to solve this problem and has as its main objective to provide a injection and regulation device allowing keep good carburetion of atmospheric burners with gas intended to operate in nominal low mode pressure when you want to adjust their diet to a minimum idle from nominal pressure.
  • a second stage injector is intended to include devices comprising several stages, and / or devices with several injectors per stage).
  • the principle of the invention is therefore to provide several injectors used in cascade, reducing the caliber of the respective injectors for a given quantity of gas delivered, and leading to an increase in the speed of ejection of the gas flow and improved air suction effect at the entrance to the Venturi element.
  • one of the injectors is arranged in the axis of the pipe air supply, each of the other injectors being inclined with respect to said axis so as to converge on the latter.
  • At least one of the second stage injectors is mounted on an injector tube housing a needle having a tapered end of section adapted for penetrate the injection nozzle, said needle being associated with actuating means able to move it from so as to bring it either into a closed position of the gas supply to the injector, either in regulation positions where it generates variations in flow functions of its position.
  • Such a provision makes it possible to generate progressive opening and closing of the nozzle second stage injectors and get optimal gas ejection speed for all diets.
  • At least one of the injectors of the second stage is advantageously mounted on an injector tube housing a needle with a tapered end of section suitable for entering the injection nozzle, the injector tube being associated with a valve provided with a movable member, and the needle being integral with the member mobile of said valve and coming in the extension of the latter, so as to bring said needle into regulation positions where it generates variations in flow functions of its position.
  • this provision allows to gradually close and open injection nozzles and optimize the ejection speed gases.
  • the regulation means are of the type individual and include a valve controlled from gas flow regulation, associated with each burner heater, and connected to a pipe main gas supply.
  • the idle pre-injector allows create, when the controlled valve is closed, a loss of charge allowing a pressure corresponding to the minimum idle speed of the associated burner.
  • this pre-injector is preferably a conventional type injector comprising a body forming a plug with an orifice injection, towards one of its ends, said injector being positioned "head to tail" so that the gas penetrates through the injection port.
  • This second embodiment constitutes a more economical solution than the one described above because it removes the shutter valves from second stage injectors, this economic gain being however obtained at the expense of a slight drop in performance at the end of closing or at the start of opening of the controlled valve.
  • the position of the first stage injector must be adapted to the fact that said injector, on the one hand, is supplied with a fixed gas pressure corresponding to nominal pressure and, on the other hand, must provide a injection rate corresponding to the minimum speed of slow motion.
  • a first advantageous solution aimed at meeting these requirements consists in making a device comprising a second stage injector arranged in the axis of the air supply pipe, and a first stage inclined with respect to said axis so as to converge towards the latter, and positioned so that its injection nozzle is offset longitudinally towards the front versus that of the second injector floor.
  • Another solution is to perform a device comprising a second stage injector arranged in the axis of the air supply pipe, and a first stage injector inclined with respect to said axis of so as to converge towards the latter, and positioned so its injection nozzle is offset longitudinally towards rear compared to that of the second injector floor, said device then comprising an obstacle arranged to intercept the flow of gas delivered by the first stage injector.
  • This second solution which consists of adjust the gas ejection speed by interposing a obstacle in the path of the gas jet in order to slow down its speed and change, by decreasing, the amount of air driven, is the most advantageous.
  • the obstacle can be made of very simple way, for example by means of a screw making protrusion inside the air supply pipe, and its position can be adjusted very easily up to obtaining optimal operating conditions.
  • Injection and regulation according to the invention are shown in figures associated with heaters 1 to infrared as used in the agricultural sector for heating of livestock buildings.
  • such heaters 1 include in the first place a reflector 2 in the form of a dome intended to be suspended above the chosen location using for example a chain 3, and containing the diffusion, combustion and radiation organs (of such bodies, not shown, may in particular be of the type of those described in patent US 5060629 in the name of depositor).
  • Each heater 1 comprises, in in addition, a supply line for air / gas mixture consisting of a bent pipe provided, so classic, a venturi element 5 and a mouthpiece inlet 6 for primary combustion air.
  • This heater 1 comprises, also, conventionally, a safety valve 7 connected to a gas supply pipe 8 for said gas device, and the output of which is connected to means of gas injection arranged upstream of the venturi element 5 and described below.
  • such devices for heating 1 are intended to operate in nominal mode low pressure with possibility of modulation of their speed up to a minimum idle speed.
  • the means of regulation allowing this modulation are either centralized ( Figures 1, 2, 3, 4, 9, 10) and therefore common to several heaters, i.e. individual and composed of a controlled regulation valve the gas flow rate associated with each appliance ( Figures 5 to 8).
  • Figure 1 shows a installation with centralized regulation means, comprising a main supply line 9 on which are connected supply lines 8 gas from heaters.
  • These centralized means of regulation are typically consist of a control panel 10 with thermostatic valve or power regulator slaved to a servo motor, the whole being arranged in parallel to a branch line 11 on which is arranged an idle pressure reducer 12.
  • each heater has a first stage injector 13 connected directly to a safety valve 7 outlet and arranged to extend in line with the pipe 4.
  • This heater comprises, in in addition, a second stage injector 14 inclined relative to to the axis of the pipe and set back relative to to the first stage injector 13.
  • This injector 14 is connected to a second outlet of the safety valve 7 via a branch line 15 on which is mounted a membrane valve 16.
  • This injector second floor 14 is, moreover, directly secured to an internal protuberance 17 of the pipe 4, pierced with a gas supply bore 18.
  • the diaphragm valve 16 whose design will be described later with reference to Figure 12, is conventionally adapted to seal the pipe of bypass 15 when the gas pressure in this the latter becomes below a predetermined threshold.
  • One such embodiment is particularly suitable for heating installations with a nominal supply pressure greater than 100 mbar, with a possible pressure variation between 20 mbar and nominal power.
  • the first stage injector 13 is calibrated to give a injection rate suitable for a pressure of 20 mbar.
  • FIG. 5 to 8 are for heaters with their own individual regulatory body, consisting of a thermostatic valve whose design will be described later with reference to Figure 11.
  • the thermostatic valve 19 is disposed upstream of the safety valve 7.
  • the pipe gas supply 8 has a bypass section 20 comprising an idling pre-injector 21.
  • Such an idle pre-injector 21 is designed to create when the thermostatic valve 19 is closed, a pressure drop allowing a pressure corresponding to the minimum idling speed.
  • the pre-injector 21 furthermore consists of an injector classic positioned "head to tail" so that the gas enters through its injection port.
  • the injectors are arranged identically to those of the heater of figure 4: the injector of first stage 22 is connected directly to the valve safety 7 and extends in the axis of the pipe, and the second stage injector 23 is inclined relative to said axis, and connected to the safety valve 7 by a bypass line 24 comprising a membrane valve 25.
  • One such embodiment is particularly suitable for heating installations whose nominal supply pressure is greater than 150 mbar, with a possible variation between 20 mbar and the nominal power.
  • the first stage injector 22 is calibrated to give an injection rate appropriate to the pressure supplied by the pre-injector 21.
  • the thermostatic valve 26 is disposed downstream of the safety valve 7.
  • the first stage injector 27 is directly connected to one of the valve outputs safety 7 by a bypass line 28 and is located arranged in place of the second stage injector (14 or 23) of the preceding variants, that is to say inclined relative to the axis of the pipe, and set back by compared to the second stage injector 29 which extends to it in line with the pipe.
  • an obstacle 30, consisting of a screw protruding inside the pipe, is arranged to intercept the flow of gas delivered by this injector in order to slow down the speed of the gas jet and decrease the amount of air entrained by the latter.
  • the first stage injector 27 can be adapted to have a length such that its injection nozzle is arranged in front of that of the second stage injector 29. In this case the obstacle 30 is useless.
  • One such embodiment is particularly suitable for heating installations whose nominal supply pressure is between 100 and 150 mbar, and is a solution particularly economical.
  • the first stage injector 31 is similar to that of the previous embodiment, that is to say connected directly to the safety valve 7 by a bypass line 32, inclined at an angle relative to the axis of the pipe, set back from the second stage injector 33, and associated with an obstacle 34 intercepting the gas flow.
  • the second stage injector 33 extends meanwhile in line with the pipe and is mounted on the end of an injector holder tube 35, secured to its other end on the valve body 36 thermostatic 37, as shown in FIG. 8.
  • This injector holder tube 35 also houses a needle 38 having a tapered section end suitable for entering the injection nozzle of the injector 33, so as to generate variations in flow functions of the relative position of said end tapered relative to said injection nozzle.
  • This needle 38 has, moreover, a suitable length so that its end opposite its tapered end extends into the extension of the injector tube 35.
  • Thermostatic valve 37 includes a valve body divided into two body half 36a, 36b, delimiting an annular internal groove housing the periphery of a membrane 39.
  • One of these body halves 36a has a tapped hole 40 front for fixing the nozzle holder tube 35, and a lateral threaded orifice 41 intended for the connection of the thermostatic valve 37 with the valve security 7.
  • This half of body 36a comprises, in additionally, a seat 42 coaxial with the front threaded orifice 40, and communicating with said front orifice by through a bore 43 opening into the bottoms respective said orifice and seat.
  • the second half of body 36b delimits an internal chamber 44 with a vent hole 45 ensuring that said air is brought to atmospheric pressure bedroom.
  • the thermostatic valve 37 comprises, in in addition, a valve 46 of a shape adapted to cooperate with the seat 42, and a conventional bellows 47 with expandable fluid, arranged on either side of the membrane, bearing against a floating part 48 secured to said membrane.
  • This thermostatic valve 37 and the tube injector holder 35 are arranged, as shown in the Figure 8, so that the needle 38 comes into abutment against valve 46, and is moved in the direction of plugging the injection nozzle during elongation bellows 47.
  • One such embodiment is particularly suitable for heating installations whose supply pressure is around 100 mbar, fitted with high power heaters heat (5,000 to 10,000 Watts).
  • the opening and the progressive closing of the injection nozzle of the second stage injector 33 provides a optimal gas speed at all speeds.
  • This heater has a first stage injector 50 connected directly to the safety valve 7 via a bypass line 51, and secured to the internal protrusion 17 of the pipe, so as to extend along an axis inclined with respect to the axis of said pipe.
  • the second stage injector 52 extends meanwhile in the axis of the pipe, in front of the first stage injector 50, and is mounted on the end of a tube 53 integral with the injector holder, towards its other end, on the body of a membrane valve 54 as shown in Figure 10.
  • This injector holder tube 53 also houses a needle 55 having a tapered section end suitable for entering the injection nozzle of the injector 52, so as to generate variations in flow functions of the relative position of said end tapered relative to said injection nozzle.
  • This needle 55 has, moreover, a length adapted so that its end opposite its tapered end extends into the extension of the injector tube 53.
  • the membrane valve 54 includes it has a valve body divided into two body halves 54a, 54b delimiting an annular internal groove housing the periphery of a membrane 56.
  • One of these body halves 54a has a front threaded hole 57 for fixing the nozzle holder tube 53, and a lateral threaded orifice 58 intended for the connection of the membrane valve 54 with the valve security 7.
  • the second half of body 54b delimits an internal chamber 59 with a vent hole 60 ensuring that said air is brought to atmospheric pressure chamber, inside which opens the orifice threaded front 57.
  • This membrane valve finally comprises conventionally, a spring 61 housed in the chamber 59, supported by one end on a floating part 62 integral with the membrane 56, and by its other end on a movable stop 63 whose position is controlled by a adjusting screw 64.
  • This diaphragm valve 54 and the injector tube 53 are arranged so that the needle 55 is secured to the floating part 62 and is moved longitudinally as a function of gas pressure supply modulated by regulation means centralized.
  • the injector tube 53 forms a seat 65
  • the needle 55 has a flange in valve form 66 capable of closing the seat 65, in the deployed position of the spring 58 corresponding to a gas supply pressure below preset threshold for closing the diaphragm valve 54.
  • this version is particularly suitable for heating systems including supply pressure is around 100 mbar, fitted with large power heating.
  • FIG 11 is a block diagram of thermostatic valves 19, 26 fitted to the devices shown in Figures 5 and 6.
  • This thermostatic valve is divided into two chambers 67, 68 by a membrane 69 secured to the level from its periphery to the valve body, and carrying a floating part 70.
  • This valve conventionally comprises, of a hand, a valve 71 bearing against the workpiece floating 70 and biased in the direction of opening of said valve by a spring 72, and on the other hand, a bellows 73 with expandable fluid bearing against the opposite side of the floating part 70 in order to urge the valve 71 in the closing direction, when it elongation.
  • Figure 12 is a diagram of principle of the membrane valves 16, 25 equipping the devices shown in Figures 4 and 5.
  • This diaphragm valve is divided in two chambers 74, 75 by a membrane 76 carrying a part floating 77.
  • a valve 78 integral with the floating part 77, while the other chamber 75 contains a spring 79 pressing at one end against the floating part 77, and, by its opposite end, against a movable stop 80 the position of which is adjusted by an adjusting screw 81.

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

Claims (15)

  1. Gerät zur Einspritzung und zur Regulierung zwischen einer minimalen, sogenannten Leerlaufleistung und einer maximalen, sogenannten Nennleistung für einen atmosphärischen Infrarot-Gasbrenner von Heizmitteln (1), im besonderen von der Infrarotart, wobei der Gasbrenner eine Luftversorgungsleitung mit einer Lufteinlaßöffnung (6) und ein Venturi-Teil (5) umfaßt, und wobei das Gerät mit in der Luftversorgungsleitung jedes Brenners stromauf des Venturi Teils (5) positionierten Gasversorgungsleitungsmitteln (8, 15; 8, 24; 8, 28; 8, 32; 8, 51) verbundene Gaseinspritzmittel aufweist , sowie Mittel (10-12, 16; 19, 25; 37; 10-12, 54) zur Regulierung der die Einspritzmittel speisende Gasmenge, und dadurch gekennzeichnet, daß:
    die Einspritzmittel mindestens zwei Injektoren (13, 14; 22, 23; 27, 29; 31, 33; 50, 52), nämlich einen sogenannten Injektor der ersten Stufe (13; 22; 27; 31; 50) und mindestens einen sogenannten Injektor der zweiten Stufe (14; 23; 29; 33; 52) aufweisen, wobei jeder Injektor eine Einspritzdüse aufweist und in der Luftversorgungsleitung stromauf des Venturi Teils (5) positioniert ist, und die jeweiligen Einspritzdüsen voneinander longitudinal abgesetzt und so ausgerichtet sind, daß deren Strömungsachse zu einem sogenannten Fokusbereich des Venturi-Teils (5) konvergiert, wobei der Fokusbereich auf der Achse der Luftversorgungsleitung (4) im Bereich des Venturi-Teils positioniert ist,
    die Gasleitungsmittel (8, 15; 8, 24; 8, 28; 8, 32; 8, 51) für die Injektoren so angepaßt sind, daß der Injektor der ersten Stufe (13; 22; 27; 31; 50) beständig mit einer Gasmenge versorgt wird, die mindestens der Gasmenge entspricht, die zur Aufrechterhaltung der Leerlaufleistung nötig ist,
    die Regulationsmittel (10-12, 16; 19, 25; 26; 37; 10-12, 54) zur Steuerung der Versorgung jedes Injektors der zweiten Stufe (14; 23; 29; 33; 52) in Übereinstimmung mit Temperaturkontrolldaten so angepaßt sind, um die gewünschte Leistung zu erhalten,.
  2. Gerät zur Einspritzung und zur Regulierung gemäß Patentanspruch 1, dadurch gekennzeichnet, daß einer (13; 22; 29; 33; 52) der Injektoren auf der Achse der Luftversorgungsleitung positioniert ist, wobei jeder (14; 23; 27; 31; 50) der anderen Injektoren in Relation zu der Achse so geneigt ist, daß er gegen diese konvergiert.
  3. Gerät zur Einspritzung und zur Regulierung gemäß einem der Patentansprüche 1 oder 2, dadurch gekennzeichnet, daß mindestens einer (33; 52) der Injektoren der zweiten Stufe auf einem injektortragenden Rohr (35; 53) montiert ist, das eine Spindel (38; 55) mit einem verjüngtem Ende mit einem Querschnitt zur Eindringung in der Injektionsmündung aufnehmt, wobei die Spindel mit Antriebsmitteln (38, 46, 47; 61) verbunden ist, die angepaßt sind um die Spindel so zu bewegen, daß die Spindel entweder in eine die Gasversorgung zum Injektor (33; 52) sperrende Position gebracht wird oder in Regulierungspositionen, in welchen die Spindel Durchsatzvariationen in Abhängigkeit von ihrer Position hervorruft.
  4. Gerät zur Einspritzung und zur Regulierung gemäß einem der vorangehenden Patentansprüche, das zentralisierte, auf einer eine Vielzahl von Heizvorrichtungen (1) mit Gas versorgenden Hauptleitung (9) montierte Regulierungsmittel (10-12) aufweist, die angepaßt sind, um den Gasdruck in der Hauptleitung (9) in Abhängigkeit von Temperaturkontrolldaten zu regulieren, wobei das Gerät dadurch gekennzeichnet ist, daß:
    jeder Injektor der ersten Stufe (13; 50) jedes Brenners an die Hauptleitung (9) so angeschlossen ist, daß der Gasversorgungsdruck des Injektors der Druck ist, der von den Regulationsmitteln (10-12) bestimmt ist,
    jeder Injektor der zweiten Stufe (14; 52) jedes Brenners mit der Hauptleitung (9) mittels einer mit einem zwischengeschalteten Ventil (16; 54) ausgestatteten Leitung (15) verbunden ist, wobei das Ventil angepaßt ist, um die Leitung zu sperren wenn der Gasdruck in der Leitung unter eine vorbestimmte Schwelle reduziert wird.
  5. Gerät zur Einspritzung und zur Regulierung gemäß Patentanspruch 4, dadurch gekennzeichnet, daß jedes Ventil ein Membranventil (16) ist, das zwei voneinander mittels einer Membran (76) gasdicht getrennte Kammern (74, 75) aufweist, wobei:
    eine Kammer (74) einen Versorgungseinlaß und einen Versorgungsauslaß aufweist, der einen Sitz formt und eine starr an die Membran (76) befestigte Absperrklappe (78) aufnehmt, die angepaßt ist, um den Sitz zu sperren,
    eine Kammer (75) elastische Mittel (79) aufnehmt, die angepaßt sind, um die Membran (76) in der Schließrichtung des Sitzes durch die Absperrklappe (78) vorzuspannen.
  6. Gerät zur Einspritzung und zur Regulierung gemäß Patentanspruch 4, dadurch gekennzeichnet, daß mindestens einer (52) der Injektoren der zweiten Stufe auf einem injektortragenden Rohr (53) montiert ist, das eine mit einem verjüngtem Ende mit einem Querschnitt zur Eindringung in der Injektionsmündung Spindel (55) aufnehmt, wobei das injektortragende Rohr mit einem Ventil (54) verbunden ist, das ein bewegliches Glied besitzt, und die Spindel (55) starr mit dem beweglichen Glied des Ventils verbunden ist und mit dem beweglichen Glied fluchtet, um die Spindel in Regulierungspositionen zu bringen, in welchen die Spindel Durchsatzsvariationen in Abhängigkeit ihrer Position hervorruft.
  7. Gerät zur Einspritzung und zur Regulierung gemäß einem der Patentansprüche 1 bis 3, dadurch gekennzeichnet, daß die Regulierungsmittel von einzelner Art sind und ein gesteuertes Ventil (19; 26; 37) zur Regulierung des Gasdurchsatzes aufweisen, wobei das gesteuerte Ventil mit jedem Brenner der Heizvorrichtung verbunden und an eine Hauptgasversorgungsleitung (8) angeschlossen ist.
  8. Gerät zur Einspritzung und zur Regulierung gemäß Patentanspruch 7, dadurch gekennzeichnet, daß:
    jeder Injektor der ersten Stufe (22) jedes Brenners an das verbundene, gesteuerte Ventil (19) mittels einer Leitung angeschlossen ist, die einen von dem Ventil abgezweigten Abschnitt (20) aufweist, wobei der Abschnitt einen Leerlaufvorinjektor (21) umfaßt, der einen sol.chen Durchmesser aufweist, daß in der Schließposition des gesteuerten Ventils (19) ein Druckabfall verursacht wird, der angepaßt ist um einen mit der Leerlaufleistung des Brenners korrespondierenden Gasdruck entstehen zu lassen,
    jeder Injektor der zweiten Stufe (23) jedes Brenners mit der Versorgungsleitung des Injektors der ersten Stufe (22) mittels einer mit einem zwischengeschalteten Ventil (25) ausgestatteten Leitung (24) verbunden ist, wobei das Ventil angepaßt ist, um die Leitung zu sperren, wenn der darin befindliche Gasdruck unter eine vorbestimmte Schwelle reduziert wird.
  9. Gerät zur Einspritzung und zur Regulierung gemäß Patentanspruch 8, dadurch gekennzeichnet, daß der Leerlaufvorinjektor (21) ein Injektor des herkömmlichen Typs ist, der in der Nähe eines desses Enden einen tassenförmigen Körper mit einer Injektionsöffnung aufweist, wobei der Injektor "Kopf bei Fuß" positioniert ist, damit das Gas durch die Injektionsöffnung eindringt.
  10. Gerät zur Einspritzung und zur Regulierung gemäß einem der Patentansprüche 8 oder 9, dadurch gekennzeichnet, daß jedes Ventil (25) ein Membranventil ist, das zwei voneinander mittels einer Membran (76) gasdicht getrennte Kammern (74, 75) auweist, wobei:
    eine Kammer (74) einen Versorgungseinlaß und einen Versorgungsauslaß aufweist, der einen Sitz formt und eine starr an die Membran (76) befestigte Absperrklappe (78) aufnehmt, die angepaßt ist um den Sitz zu sperren,
    eine Kammer (75) elastische Mittel (79) aufnehmt, die angepaßt sind, um die Membran (76) in der Schließrichtung des Sitzes durch die Absperrklappe (78) vorzuspannen.
  11. Gerät zur Einspritzung und zur Regulierung gemäß Patentanspruch 7, dadurch gekennzeichnet, daß:
    jeder Injektor der ersten Stufe (27; 31) jedes Brenners an eine stromauf dem verbundenen gesteuerten Ventil (26; 37) geschalteten Leitung (28; 32) angeschlossen ist, damit der Gasversorgungsdruck des Injektors gleich dem der Hauptgasversorgungsleitung (8) ist,
    jeder Injektor der zweiten Stufe (29; 33) jedes Brenners an eine stromab dem verbundenen gesteuerten Ventil (26; 37) geschalteten Leitung angeschlossen ist.
  12. Gerät zur Einspritzung und zur Regulierung gemäß Patentanspruch 11, dadurch gekennzeichnet, daß das Gerät einen auf der Achse der Luftversorgungsleitung positionierten Injektor der zweiten Stufe (29; 33) aufweist, sowie einen zur Konvergierung zu der Achse in Relation zu dieser Achse geneigten Injektor der ersten Stufe, der so positioniert ist, daß dessen Injektionsmündung longitudinal gegen die Vorderseite in Relation zu der des Injektors der zweiten Stufe (29; 33) ausläuft.
  13. Gerät zur Einspritzung und zur Regulierung gemäß Patentanspruch 11, dadurch gekennzeichnet, daß das Gerät einen auf der Achse der Luftversorgungsleitung positionierten Injektor der zweiten Stufe (29; 33) aufweist, sowie einen zur Konvergierung zu der Achse in Relation zu dieser Achse geneigten Injektor der ersten Stufe (27; 31), der so positioniert ist, daß dessen Injektionsmündung longitudinal gegen die Rückseite in Relation zu der des Injektors der zweiten Stufe (29; 33) ausläuft, wobei das Gerät dann eine Sperre (30; 34) aufweist, die so positioniert ist, daß der von dem Injektor der ersten Stufe (27; 31) ausgehenden Gasfluß untergebrochen wird.
  14. Gerät zur Einspritzung und zur Regulierung gemäß einem der Patentansprüche 11 bis 13, wobei das gesteuerte Ventil (37) einen mit einem Flüssigkeitseinlaß (41) und einem Flüssigkeitsauslaß (42) sowie mit einer unter Wirkung eines ausdehnbaren thermostatischen Teils (47) zur Blockierung des Flüssigkeitsauslasses angepaßte Absperrklappe (46) ausgestätteten Ventilkörper aufweist, wobei das Gerät dadurch gekennzeichnet ist, daß es einen auf ein injektortragendes Rohr (35) montierten Injektor der zweiten Stufe (33) umfaßt, wobei das Rohr eine Spindel (38) aufnehmt, die ein verjüngtes Ende mit einem zur Eindringung in der Injektionsmündung angepaßten Querschnitt aufweist, wobei:
    das injektortragende Rohr (35) starr an dem Körper des gesteuerten Ventils (37) so befestigt ist, daß es in der Verlängerung des Flüssigkeitsauslasses (42) des letzteren positionierbar ist,
    die Spindel (38) so positioniert ist, daß sie von der Absperrklappe (46) des gesteuerten Ventils (37) in der Richtung des Schließens der Injektionsmündung während einer eine Reduktion des Gasdurchlasses generierenden Bewegung versetzt wird,
    die Spindel (38) mit elastischen Mitteln (48) verbunden ist, die so angepaßt sind, daß sie eine Bewegung der Spindel in der Richtung der Öffnung der Injektionsmündung hervorrufen.
  15. Gerät zur Einspritzung und zur Regulierung gemäß einem der Patentansprüche 11 bis 14, dadurch gekennzeichnet, daß das gesteuerte Ventil ein thermostatisches Ventil ist, das zwei voneinander mittels einer Membran (69) gasdicht getrennte Kammern (67, 68) aufweist, wobei:
    eine Kammer (68) einen Versorgungseinlaß und einen Versorgungsauslaß aufweist, der einen Sitz formt und eine Absperrklappe (71) umfaßt, die an der Membran (69) unterstützt und so angepaßt ist, daß sie den Sitz sperrt,
    eine Kammer (67) ein expansibles, flüssigkeitsthermostatisches Teil (73) aufnehmt, das an der Membran (69) unterstützt ist, um die Membran in Öffnungsrichtung vorzuspannen.
EP94202045A 1993-07-23 1994-07-14 Einspritz- und Regelvorrichtung für atmosphärische Gasbrenner von Heizgeräte, insbesondere der Infrarottyp Expired - Lifetime EP0635679B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9309379A FR2708085B1 (fr) 1993-07-23 1993-07-23 Dispositifs d'injection et de régulation pour brûleurs atmosphériques à gaz fonctionnant à faible pression nominale.
FR9309379 1993-07-23

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EP0635679A1 EP0635679A1 (de) 1995-01-25
EP0635679B1 true EP0635679B1 (de) 1998-10-07

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EP (1) EP0635679B1 (de)
JP (1) JPH07269850A (de)
DE (1) DE69413756T2 (de)
ES (1) ES2124362T3 (de)
FR (1) FR2708085B1 (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0754914B1 (de) * 1995-07-19 2001-04-18 Centre D'etude Et De Realisations D'equipement Et De Materiel (C.E.R.E.M.) S.A.R.L. Einspritzvorrichtung für atmosphärische Gasbrenner von Heizgeräten, insbesondere des Infrarottyps
US8246344B1 (en) * 2003-07-29 2012-08-21 Samuel Schrock Gas lamp
US9328937B2 (en) 2011-06-07 2016-05-03 L.B. White Company, Inc. Variable rate heating for agricultural purposes
DE102012106230A1 (de) 2012-07-11 2014-05-15 Kraussmaffei Technologies Gmbh Komponentenzufuhrdüse
DE102018104209C5 (de) 2018-02-23 2023-11-30 Hennecke Gmbh Komponentenmischdüse

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE535137C (de) * 1931-10-03 Ignis Huettenbaugesellschaft M Mischduesenbrenner mit mehreren Duesen
US2939524A (en) * 1957-08-29 1960-06-07 Roper Corp Geo D Control system for gas burners
US3599661A (en) * 1970-02-05 1971-08-17 Walton W Cushman Self-modulating gas burner
DE2151611A1 (de) * 1971-10-16 1973-04-19 Rheinstahl Ag Atmosphaerischer gasbrenner
JPS5888273A (ja) * 1981-11-19 1983-05-26 Paloma Ind Ltd 大型ガス燃焼器の供給ガス圧降下防止装置付きガス圧力調整器
FR2642821A1 (fr) * 1989-02-07 1990-08-10 Etu Realisa Equip Materie Cent Radiant infra-rouge a gaz avec pre-chambre de diffusion et thermocouple a fusible haute temperature

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EP0635679A1 (de) 1995-01-25
FR2708085A1 (fr) 1995-01-27
FR2708085B1 (fr) 1996-05-24
US5549099A (en) 1996-08-27
ES2124362T3 (es) 1999-02-01
DE69413756T2 (de) 1999-06-17
JPH07269850A (ja) 1995-10-20
DE69413756D1 (de) 1998-11-12

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