EP0354099B1 - Warmluft-Erhitzer für gasförmigen Brennstoff - Google Patents

Warmluft-Erhitzer für gasförmigen Brennstoff Download PDF

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Publication number
EP0354099B1
EP0354099B1 EP89402130A EP89402130A EP0354099B1 EP 0354099 B1 EP0354099 B1 EP 0354099B1 EP 89402130 A EP89402130 A EP 89402130A EP 89402130 A EP89402130 A EP 89402130A EP 0354099 B1 EP0354099 B1 EP 0354099B1
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EP
European Patent Office
Prior art keywords
hot air
generator according
stream generator
gas
tube
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.)
Expired - Lifetime
Application number
EP89402130A
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English (en)
French (fr)
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EP0354099A1 (de
Inventor
Alain Le Marchand
Francis Moumaneix
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Guilbert Express
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Guilbert Express
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Priority to AT89402130T priority Critical patent/ATE85683T1/de
Publication of EP0354099A1 publication Critical patent/EP0354099A1/de
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Publication of EP0354099B1 publication Critical patent/EP0354099B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F23D14/70—Baffles or like flow-disturbing devices
    • 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
    • F23D14/28—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid in association with a gaseous fuel source, e.g. acetylene generator, or a container for liquefied gas
    • 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
    • F23D—BURNERS
    • F23D91/00—Burners specially adapted for specific applications, not otherwise provided for
    • F23D91/02—Burners specially adapted for specific applications, not otherwise provided for for use in particular heating operations

Definitions

  • the invention relates to a hot air current generator, that is to say an apparatus projecting a current of hot air beyond the free end of a tube which directs it.
  • Such devices are known, for example hair dryers, in which an air current is produced by a fan and heated by an electrical resistance.
  • FR-A-2 375 542 describes such an apparatus, comprising means for producing a mixture of air and moving combustible gas, a flame catching grid disposed transversely in the path of the mixture, and a director tube for channeling a stream of hot mixture of air and burnt gas resulting from the combustion of the combustible gas, the downstream end of the tube opening to the open air.
  • the flame produced by the combustion of the gas must be prevented from spreading beyond the free end of the direction tube. This condition is difficult to fulfill because the flame tends to extend until it encounters an influx of fresh air sufficient to allow complete combustion of the gas.
  • Another known technique is to adopt a tube large diameter to allow outside air to enter through the downstream end at the same time as the hot air stream comes out.
  • this results in a decrease in the speed and efficiency of the stream of hot air.
  • a first object of the invention is to provide a hot air gas generator whose flame does not protrude beyond the director tube and which does not have the drawbacks mentioned above of the known solutions.
  • a second aim is to facilitate the ignition of the device without requiring maneuvers aimed at temporarily modifying the characteristics of the air-gas mixture.
  • the latching and crushing grids define between them a combustion chamber laterally limited by a substantially continuous side wall.
  • the device comprises a body forming a hollow handle into which an interchangeable cartridge can be inserted as a gas source, the handle forming an obtuse angle with the director tube. It is then advantageous for the free end of the hollow handle to define an oblique plane with respect to the longitudinal direction of the handle so that the generator can be placed in stable equilibrium by said end on a horizontal receiving surface.
  • the speed of the current is relatively reduced and / or the proportion of the combustible gas in the mixture before ignition is higher than the proportion in which this gas is introduced by the means of mixed.
  • the hot air current generator as defined above will be able to operate in different orientations, thanks to an injector provided with a small diameter hole to form a jet of pressurized combustible gas coming from a tank of liquefied gas and mix it with air, and means to transmit to the injector the heat produced by the combustion of the gas.
  • liquefied gas can flow by gravity to the injector.
  • the heating thereof allows vaporizing the liquefied gas and preventing it from crossing the injection hole, which would result in excessive flow.
  • means are provided upstream of the injection hole to limit the influx by gravity of liquefied gas to the injector.
  • these limiting means comprise a diaphragm interposed on the path of the pressurized gas and provided with a passage hole of small diameter, preferably between approximately 0.1mm and 0.3mm .
  • front and rear refer respectively to the downstream and upstream directions with respect to the gas stream in the apparatus, corresponding to the left side and to the right side of Figures 1 and 4a.
  • the hot air generator shown in Figure 1 comprises a body 1 in molded zamak having an outer contour of revolution with the exception of a boss 2 which projects outward over a small part of the circumference and ventilation openings not shown.
  • the body 1 has the general shape of a bucket having a bottom 3 pierced with a circular central opening 4 and a side wall 5, in which the aforementioned openings are formed, widening in a truncated cone from the bottom 3 and extending by a cylindrical part 6 opposite the bottom. From the latter, an annular flange 7 surrounding the opening 4 at a distance extends towards the outside of the body, forming a cylindrical housing 8.
  • the frustoconical wall 5 carries an internal boss 9 at a location on the circumference.
  • the external boss 2 is extended towards the inside of the body by two wings curved towards one another 10 which, in cooperation with the boss 2, define a housing 11 for a piezoelectric igniter 12.
  • a brass mixing tube 14 extends coaxially to the body 1 and has a slightly front end set back from the open end of the body 1 and a rear end located beyond the bottom 3. Openings 15 are formed through the wall of the tube 14 between the outside of the latter and its axial bore 16. These openings are located at the bottom 3 of the body. At its front end, the mixing tube 14 has a portion of reduced outside diameter 18 externally threaded, limited by an annular shoulder 17.
  • An injector 19 provided at its front end with a gas injection hole 20, is threaded into the bore 16 at the rear of the tube 14 and comes into abutment against the latter by an annular flange 60.
  • a filter 21 in the form of a porous mass and, at the rear end of the injector, a diaphragm 22 in the form of a disc pierced with a hole 23, the edge of the diaphragm 22 being trapped axially between an internal shoulder and a crimping lip 24 of the injector.
  • the rear end of the mixing tube 14 is surrounded by a nut ring 25 having at its rear part an internal thread intended to cooperate with an outlet connector 26, shown in broken lines, forming part of a supply tap combustible gas.
  • the nut ring 25 has at its front end an annular flange 27 directed towards the axis, which cooperates with a shoulder of the tube 14 to prevent the latter from moving forward. This front end of the nut-ring penetrates with a radial clearance in the housing 8 of the body 1.
  • the mixing tube 14 is screwed by its front part into a spun brass spider 28, shown at Figure 2 in axial view from the rear, and whose rear end abuts against the shoulder 17 of the tube 14.
  • the spider 28 comprises a central portion 29 forming a sleeve, from which four radial arms from the 'opposite the axis 58 of the tube 14 and arranged at right angles to each other. Three of these arms referenced 30 have the same reduced circumferential width and extend continuously from front to rear, while the fourth arm 31 has a greater circumferential width and has an internal recess 32 communicating with the axial bore 33 of the sleeve 29.
  • the wall of the arm 31 situated behind the recess 32 is crossed axially by a frustoconical opening 34 whose small base is adjacent to the recess 32.
  • a flame attachment grid 35 is arranged across the bore 33. It bears rearwardly against a shoulder of the latter, in which it is immobilized, for example by adjustment with clamping.
  • a flame crushing grid 36 bars the front end of the bore 33 and is immobilized axially between a shoulder of the latter and an annular crimping lip of the sleeve 29.
  • the arms 30 and 31 have front faces 38 located in the same radial plane, beyond which extend the axial flanges 39 defining internal surfaces 40 belonging to a cylindrical surface with an axis 58 and in which a tube fits director 41 for hot air, the rear end of which abuts against the faces 38.
  • the external ends 42 of the arms 30 and 31 moreover form convex cylindrical bearings on which an external tube 43 adjusts.
  • the tube 43 is crimped in crimping zones 44 located circumferentially opposite the arms 30. To the right of the arm 31 the tube is not deformed.
  • the front end 45 of the outer tube 43 is rolled inward to serve as a forward support at the end 46 of the director tube 41.
  • the spider 28 and the tubes 41 and 43 form a rigid assembly thanks to the mutual cooperation of the ends 45 and 46 of the tubes, to the cooperation of the latter with the bearing surfaces 40 and 42 and to the partial crimping 44.
  • the grids 35 and 36 and the mixing tube 14 screwed fully into the spider are integral with this assembly.
  • Two axial stainless steel tie rods, not shown, are fitted with tightening by blind bores on the pins 13 of the body 1 and are supported forwards by shoulders against the sleeve 29 of the cross member 28. Beyond these shoulders, the tie rods have cylindrical centering projections which cooperate with notches 47 formed at the periphery of the sleeve 29 to ensure centering and immobilization in rotation of the spider relative to the body.
  • an elastic wavy washer 48 is interposed between the nut ring 25 and the bottom 3 of the body, inside the flange 7. This washer tends to push the body and with it the tie rods relative to the nut ring 25 and, consequently, to the mixing tube 14 and to the spider 28. All the parts described so far are thus assembled and centered with respect to each other.
  • the piezoelectric igniter 12 is, for its part, trapped longitudinally between the rear end of the outer tube 43 and the bottom 3 of the body 1, its actuating push button 49 protruding from the back of this bottom at through an opening in it.
  • the boss 9 of the body 1 serves as a rear support for an axially oriented spark plug 50, which has a frustoconical part 51 cooperating with the frustoconical opening 34 of the arm 31 of the spider under the thrust of a helical spring 52, housed in a recess 53 of the boss 9 and compressed between the shoulders of this boss and the spark plug.
  • the front end of the latter penetrates, beyond the opening 34, into the recess 32 of the arm 31, where the end of its electrode 54 projects.
  • a cable 55 connects the electrode to the igniter 12 .
  • the centering tie rods pass in two opposite quadrants defined by the arms 30 and 31 of the spider, while the igniter 12 passes in a third quadrant comprised between two arms 30.
  • a combustible gas for example butane, propane or a mixture of these two compounds, coming from a liquefied gas tank, is injected under pressure through the injection hole 20 of the injector 19 into the bore 16 of the mixing tube 14, where it entrains air which penetrates through the radial openings 15.
  • the gas and the air mix homogeneously in the front part of the bore 16, the diameter of which is reduced compared to the part where the openings open 15.
  • the mixture enters the bore 33 of the spider and crosses the flame attachment grid 35 to reach the combustion chamber 56 formed by the part of the bore 33 between the grids 35 and 36.
  • This combustion chamber is closed over its entire axial length and over most of its perimeter and communicates by a single passage with an ignition chamber formed by the recess 32 of the arm 31 of the spider, this ignition chamber being located away from the axial path of the gas stream.
  • the passage between the combustion chamber 56 and the ignition chamber 32 constitutes practically the only access path of the latter, the frustoconical opening 34 being closed in a substantially sealed manner by the frustoconical part 51 of the spark plug biased by the spring 52 and the outer end of the recess 32 by adjusting the tube 43 on the bearing 42 of the arm 31. No gas stream therefore flows in the chamber 32, which contains a stationary mixture.
  • the presence of the flame crushing grid 36 causes a pressure drop resulting in a richness in combustible gas of the mixture contained in the chambers 56 and 32 greater than that corresponding to the gas and penetrating air flow rates. in the mixing tube 14, with a relatively reduced speed of flow of the mixture in the combustion chamber 56. These conditions are favorable for the creation of a flame in the ignition chamber 32 and its propagation in the chamber 56 .
  • Grid 35 shows a central hole of diameter 1.2mm and four holes of diameter 3mm arranged in a quaternary symmetry around the axis 58 of the chamber 56 and the tubes 14, 41 and 43. These five holes represent a passage section of 29.4mm2 for an outside diameter of 13.8mm, ie a section of the combustion chamber 56 at its rear end of 150mm2. The opening rate is therefore around 20%.
  • the grid 36 has five 3.5 mm diameter holes, one in the axis and the other four distributed in a quaternary symmetry around it.
  • the corresponding passage section is 48.1mm2 for a section of the chamber at its front end of 177mm2, an opening rate of approximately 27%.
  • the oxygenation is favored by the induction of fresh air created by the dynamic flow of the burnt gases through the spider 28 coming from the opening openings of the body 1 (not shown).
  • the mixing tube 14 is in good thermal contact with the sleeve and has over a substantial fraction of its length, between the shoulder 17 and the rear widening of the bore 16, a large wall cross section allowing it to ensure a high heat flow towards the rear.
  • the injector 19 is in turn in good thermal contact with the tube 14 by its flange 30 which is pressed against a shoulder of the tube by the end of the threaded connection 26, a seal 57 being interposed between the end of the connection 26 on the one hand, the tube 14 and the flange 30 on the other hand.
  • the injector is therefore brought to a temperature high enough for liquefied gas reaching the filter 21 to vaporize therein and not likely to pass through the injection hole 20.
  • the diaphragm 22 makes it possible to limit the influx of liquefied gas to the filters 21 when the apparatus is oriented so that the liquefied gas tank is above the injector.
  • the director tube 41 in contact with the stream of burnt gas, is also brought to an elevated temperature. However, this high temperature is not communicated to the outer tube 43 which is in contact with the tube 41 only through an extremely small area.
  • the tube 43 is also in contact by reduced surfaces with the ends of the arms 31 and 40 of the spider, the small section of which further limits the supply of heat to the tube 43. The appearance of the latter is therefore not affected by its heating.
  • the body 1 it is in direct contact neither with the spider, nor with the mixing tube 14. It is in relation to the spider only by means of the centering tie rods, and with the tube 14 only by means of the nut-ring 25 - which itself has a reduced contact surface with the tube - and of the corrugated washer 48.
  • the piezoelectric igniter 12 loosely mounted in the body 1, in turn undergoes only a temperature rise of less than 50 K, which is not likely to deteriorate it.
  • the hot air generator shown in Figures 4a and 4b comprises a mixing tube 14, an injector 19 with its filter 21, a ring-nut 25, a seal 57, a spider 28, grids 35 and 36, a director tube 41, an outer tube 43 and a spark plug 50 identical to the elements bearing the same references in Figure 1, arranged and assembled together in the same way. These elements will therefore not be described again in detail.
  • the spider 28 may not include the notches 47 shown in Figure 2, these being unnecessary in the embodiment of Figures 4a and 4b.
  • valve 101 for adjusting the flow rate of a liquefied gas under pressure by screwing the nut-ring 25 on an outlet fitting.
  • threaded fitting 102 The latter is of conventional construction and is not shown in detail. It notably includes a rotary control button 103, as well as a threaded housing 104 for the outlet nozzle 105 of an interchangeable gas cartridge 106, equipped with a seal 107, and a pusher ensuring the opening. a cartridge outlet valve when the latter is screwed into the housing 104.
  • the apparatus further comprises a body 108 of plastic material loaded with glass fibers, formed of two half-shells assembled together according to the plane of Figures 4a and 4b, by means of screws 109 oriented perpendicular to this plane and passing through the bosses of the two half-shells.
  • the body 108 has the general shape of a bent tube, an end portion 110 of which surrounds the tube 14 and a portion of the spider 28 and of the tube 43, is oriented along the axis 58 of the tubes 14, 41 and 43, and of which another part 111 forming a handle surrounds the cartridge 106 and is oriented along the axis 112 thereof.
  • the two parts 110 and 111 form an obtuse angle of approximately 120 °, which therefore corresponds to the angle between the axes 58 and 112.
  • the handle portion 111 is flared in the vicinity of its open free end 113 to allow screwing and unscrewing of the cartridge 106.
  • This end 113 is located in a plane slightly inclined relative to the axis 112, so that the the device can be placed by this end on a horizontal support surface with the axis 112 deviating somewhat from a vertical orientation so that the center of gravity of the device, outside this axis, is above of the lift surface defined by the end 113.
  • the handle 111 has a notch 114 which reveals part of the lateral surface of the cartridge 106.
  • An opening is also provided in the vicinity from the front end of the handle to allow a barrel 125 of the fitting 101 to pass, in which the axis of the operating button 103 is mounted.
  • an opening is made on the concave side of the junction between the parts 110 and 111 of the body to accommodate an ignition trigger 115.
  • This trigger made of plastic material, is slidably mounted on a brass pin 116 extending in parallel at axis 58 and held at its ends by a portion external 117 and an internal portion 118 of the body.
  • a piezoelectric igniter 12 ′ similar to the igniter 12 of FIG. 1 is held in a housing while being directed parallel to the axis 58, its operating button 49 ′ being oriented towards the front.
  • the housing of the igniter 12 ′ is limited upwards (in the position of normal use of the hot air generator), that is to say towards the axis 58, by an internal wall 119 of the body 108 , downwards by another internal wall 120 of the body and by the trigger 115, and forwards by a projection 121 of the latter directed upwards.
  • the igniter is also held back by the valve 101.
  • the trigger 115 can be operated by the index finger of the hand holding the handle 111. When the trigger is pushed back, the projection 121 is pressed the button 49 ′ and causes the production of a voltage pulse which is sent to the spark plug 50 via a cable 55 ′ passing through the wall 119.
  • the spark plug 50 is applied in the frustoconical opening 34 of the cross member 28 by a spring 52 ′ acting in the same way as the spring 52 in FIG. 1 and bearing at the rear on a projection depending on the wall 119.
  • the trigger 115 is brought forward in its rest position by the return spring of the button 49 ′ of the igniter and by another helical spring 122 oriented parallel to the axis 58, compressed between the trigger and an internal wall 123 of the body 108.
  • the button 49 ′ and the spring 122 are located respectively above and below the br oche 116 so as to ensure a balance of forces and good sliding guidance of the trigger.
  • the nut-ring 25 is centered in an annular internal wall 124 of the body 108. This centering contributes, with that of the cartridge 106 in the handle 111 and that of the barrel 125 in the opening 126, when the body is joined to the rigid assembly it contains. This connection mode further reduces the heat input to the body 108 compared to that which the body 1 of FIG. 1 received, and consequently to the igniter 12 ′.
  • the cartridge 106 can be replaced by an accessory for connection to a larger gas tank.
  • This accessory consists of a tube having at its downstream end a shape similar to that of the valve of the cartridge 106, and upstream a nipple shape to receive a flexible pipe connected in leaktight manner and tightened by collar.
  • the other end of the flexible hose is tightly connected with a hose clamp to a connection for the LPG tank.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Spray-Type Burners (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Baking, Grill, Roasting (AREA)
  • Catching Or Destruction (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)

Claims (18)

  1. Vorrichtung zum Erzeugen eines Warmluftstromes, mit Mitteln zum Herstellen eines Gemisches aus Luft und in Bewegung befindlichem gasförmigen Brennstoff, einem Flammenhalterost (35), der quer im Gemischweg angeordnet ist, und einem Leitrohr (41) zum Kanalisieren eines warmen Gemischstromes aus Luft und Abgas, das aus der Verbrennung des Brennstoffes hervorgeht, wobei das stromabwärts liegende Ende (46) des Rohres zur Umgebungsluft geöffnet ist, dadurch gekennzeichnet, daß sie ferner mindestens einen Flammenlöschrost (36) umfaßt, der quer im Gemischweg stromabwärts des Flammenhalterostes (35) angeordnet ist, wobei der Löschrost (36) Öffnungsabmessungen und/oder ein Öffnungsverhältnis hat, das bzw. die größer sind als die entsprechenden Größen des Halterosts, und daß Zündmittel vorgesehen sind, die eine Zündkammer (32) aufweisen, welche abseits des genannten Weges angeordnet ist, und mit einem im Weg liegenden Hohlraum (56) kommuniziert.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Halte- und der Löschrost zwischen sich einen Verbrennungsraum (56) festlegen, der seitlich durch eine im wesentlichen durchgehende Seitenwand (33) begrenzt wird.
  3. Vorrichtung nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß der Längsabstand zwischen den beiden Rosten (35, 36) zwischen ca. 6 mm und 12 mm liegt und vorzugsweise annähernd 9 mm beträgt, für einen Brenner mit einem Ausstoß der Größenordnung von 40 g/h GPL bei ca. 1,6°.
  4. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Durchmesser der Öffnungen des Halterostes (35) zwischen ca. 2 mm und 4 mm liegt und vorzugsweise annähernd 3 mm beträgt.
  5. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Öffnungsverhältnis des Halterostes (35) zwischen ca. 15 % und 25 % liegt und vorzugsweise annähernd 20 % beträgt.
  6. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Durchmesser der Öffnungen des Löschrostes (36) zwischen ca. 2,5 mm und 4 mm liegt und vorzugsweise ca. 3,5 mm beträgt.
  7. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Öffnungsverhältnis des Löschrostes (36) zwischen ca. 22 % und 34 % liegt und vorzugsweise annähernd 27 % beträgt.
  8. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Abstand zwischen dem Löschrost (36) und dem freien Ende des Leitrohres (41) zwischen ca. 40 mm und 60 mm liegt und vorzugsweise annähernd 45 mm beträgt.
  9. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Innendurchmesser des Leitrohres (41) zwischen ca. 25 mm und 40 mm liegt und vorzugsweise annähernd 30 mm beträgt.
  10. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Leitrohr (41) radial von einem Außenrohr (43) umgeben ist.
  11. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie einen sternförmigen Körper (28) umfaßt, der eine Buchse (29), die mit einer Axialbohrung versehen ist, welche den Verbrennungsraum bildet, und radiale Arme (30, 31) hat, von denen mindestens einer (31) eine innere Aussparung (32) hat, die mit der Bohrung kommuniziert und in die durch eine Öffnung (34) das Ende einer Zündkerze hineinragt.
  12. Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, daß ein Gemischrohr (14) mit dickem Querschnitt vorgesehen ist, das an der Vorderseite mit der Buchse (29) des sternförmigen Körpers (28) verschraubt ist und an diesem mit einer Stützfläche (17) anliegt und sich an der Rückseite gegen einen Flansch (60) einer Einspritzvorrichtung (19) abstützt, so daß ein guter thermischer Kontakt zwischen den Elementen hergestellt wird.
  13. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie einen Gehäuseteil (108) aufweist, der einen hohlen Griff (111) bildet, in den eine auswechselbare Kartusche (106) als Gasquelle eingeführt werden kann.
  14. Vorrichtung nach Anspruch 13, dadurch gekennzeichnet, daß das freie Ende (113) des hohlen Griffs eine relativ zur Längsrichtung (112) des Griffes schiefe Ebene definiert, so daß die Erzeugungsvorrichtung mit stabilem Gleichgewicht mit dem Ende auf eine horizontale Aufnahmefläche gestellt werden kann.
  15. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß Mittel (12, 50) vorgesehen sind, um in der Zündkammer (32) eine Zündflamme zu erzeugen, die sich im Verbrennungsraum (56) ausbreiten kann.
  16. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Mittel zum Herstellen eines Brennstoff-Luft-Gemisches umfassen
    eine Einspritzvorrichtung (19), die mit einer Einspritzöffnung (20) kleinen Durchmessers versehen ist, um einen Strahl eines aus einem Flüssiggasreservoir (106) stammenden Druckgases zu bilden, Mittel (29, 14) zum Übertragen von bei der Gasverbrennung erzeugter Wärme zur Einspritzvorrichtung und
    Mittel (22), die stromaufwärts der Einspritzöffnung angeordnet sind, um den schwerkraftbedingten Zufluß des verflüssigten Gases zur Einspritzvorrichtung zu begrenzen.
  17. Vorrichtung nach Anspruch 16, dadurch gekennzeichnet, daß die Begrenzungsmittel ein Diaphragma (22) aufweisen, das im Druckgasstrom angeordnet und mit einer Durchlaßöffnung (23) kleinen Durchmessers versehen ist.
  18. Vorrichtung nach Anspruch 17, dadurch gekennzeichnet, daß der Durchmesser der Durchlaßöffnung (23) zwischen ca. 0,1 mm und 0,3 mm liegt.
EP89402130A 1988-08-02 1989-07-26 Warmluft-Erhitzer für gasförmigen Brennstoff Expired - Lifetime EP0354099B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89402130T ATE85683T1 (de) 1988-08-02 1989-07-26 Warmluft-erhitzer fuer gasfoermigen brennstoff.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8810427 1988-08-02
FR8810427A FR2635169B1 (fr) 1988-08-02 1988-08-02 Generateur d'air chaud a gaz

Publications (2)

Publication Number Publication Date
EP0354099A1 EP0354099A1 (de) 1990-02-07
EP0354099B1 true EP0354099B1 (de) 1993-02-10

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EP89402130A Expired - Lifetime EP0354099B1 (de) 1988-08-02 1989-07-26 Warmluft-Erhitzer für gasförmigen Brennstoff

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EP (1) EP0354099B1 (de)
JP (1) JPH0275812A (de)
AT (1) ATE85683T1 (de)
DE (1) DE68904839T2 (de)
FR (1) FR2635169B1 (de)

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US5148615A (en) * 1991-06-04 1992-09-22 Vmi Inc. Dredging apparatus
KR100669221B1 (ko) * 2003-03-10 2007-01-16 가부시키가이샤 리테크 가스연소 장치
FR2884594B1 (fr) * 2005-04-18 2007-06-01 Sefmat Sa Bruleur/generateur d'air chaud a allumage interne
FR2977125A1 (fr) * 2011-05-27 2013-01-04 Sarl 2Ebalm Desherbeur thermique a gaz sans flamme visible

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FR2375542A1 (fr) * 1976-12-24 1978-07-21 Guilbert & Fils Leon Appareil debitant un fluide gazeux chaud, notamment pour la retraction des matieres plastiques
SE7910048L (sv) * 1979-12-06 1981-06-07 Assi Can Ab Anordning for att till ett veldefinierat omrade tillfora en het gasstrom
FR2479416A1 (fr) * 1980-03-28 1981-10-02 Cit Alcatel Dispositif de chauffage pour retreindre des gaines thermoretractables
FR2520090B1 (fr) * 1982-01-15 1986-09-19 Guilbert & Fils Leon Bruleur a gaz de puissance reglable pour retracter les matieres thermo-retractables, notamment en vue de l'emballage de produits plus ou moins volumineux
FR2593892B1 (fr) * 1986-02-06 1989-09-01 Applic Gaz Sa Dispositif d'allumage et d'alimentation d'un appareil a combustion gazeuse
FR2606491B1 (fr) * 1986-11-12 1989-03-03 Stepack Dispositif d'allumage pour bruleur a haute vitesse de type a buse froide et bruleur utilisant ledit dispositif

Also Published As

Publication number Publication date
JPH0512604B2 (de) 1993-02-18
JPH0275812A (ja) 1990-03-15
DE68904839T2 (de) 1993-08-26
EP0354099A1 (de) 1990-02-07
ATE85683T1 (de) 1993-02-15
DE68904839D1 (de) 1993-03-25
FR2635169B1 (fr) 1990-11-09
FR2635169A1 (fr) 1990-02-09

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