SE185103C1

SE185103C1 -

Info

Publication number: SE185103C1
Authority: SE
Publication date: 1963-01-01

Description

Uppfinnare: R A Mentel och A IV Curtis Prioritet begard frdn den 3 juni och 30 december 1958 (USA) Foreliggande uppfinning avser en generator for infraroda stralar, narmare bestamt en anordning for forbrannande av flytande eller gasformigt bransle i och for alstrande av infraroda stralar. Inventors: R A Mentel and A IV Curtis Priority claimed from June 3 and December 30, 1958 (USA). The present invention relates to a generator for infrared rays, more particularly to a device for burning liquid or gaseous fuel and for generating infrared rays.

Ehuru anvandningen av infraroda stralar blivit en val kind 6.tgkrd mom tekniken, sá ha vid de hittills kanda konstruktionerna av generatorer fOr infrarod straining atskilliga nackdelar forelegat, men dessa undanrOjas enligt foreliggande uppfinning. Although the use of infrared rays has become an option in the art, there have been several disadvantages in the hitherto known constructions of generators for infrared straining, but these are eliminated according to the present invention.

Den sannolikt mest kanda nackdelen vid de tidigare kanda generatorerna for infrariid straining har berott pa att man anvant keramiskt material i brannarna. Detta keramiska material har vanligen bestatt av en keramisk platta av avsevard tjocklek, genom vilken hal varit anordnade, vilka medgivit, att bransiet passerat genom dem. Om nu halen aro av stor diameter, kan variation i det tryck eller den temperatur, under vilka bransiet -Mores, fiiranieda bakslag av lagan anda till blandaren eller samlingsrummet. Om .daremot halen aro sma, tappas de latt till. Dessutom komma de I sa fall att medfora en begransning av den kvantitet bransle, som kan forbrannas i anordningen, och darigenom av dess effekt. En annan nackdel, som ingalunda varit den minst kannbara, dr att keramiska material aro dyrbara, att de pa grund av sin bracklighet lätt gá solider, och att de aro svara att ersatta, sedan de Ott solider eller eljest blivit forbrukade. Probably the most known disadvantage of the previous known generators for infrared straining has been due to the use of ceramic material in the burners. This ceramic material has usually consisted of a ceramic plate of considerable thickness, through which slides have been arranged, which have allowed the industry to pass through them. If the tail is of large diameter, variation in the pressure or temperature under which the industry -Mores, flurries of the law can breathe into the mixer or assembly chamber. If, on the other hand, the tails are small, they are easily dropped. In addition, they will in that case entail a limitation of the quantity of fuel that can be burned in the device, and thereby of its effect. Another disadvantage, which has by no means been the least noticeable, is that ceramic materials are expensive, that they are easily solid due to their brittleness, and that they are liable to be replaced after they have been solid or otherwise consumed.

Genom foreliggande uppfinning är det mojligt att astadkomma en generator for infrarod straining, vilken staller sig betydligt mycket billigare i tillverkning, dr betydligt mycket mera hallbar och robust an de kanda anordningarna, är lattare att Ora ren och att halla ren eller är latt till sin vikt, samt i vilken det ar lattare att ersatta generatorns delar. Dar- till kommer, att generatorn astadkommer en jamnare fordelning av lagan och darigenona mojligg8r en effektivare reglering for avgivande av olika varmekvantiteter pr tidsenhet. By means of the present invention it is possible to provide a generator for infrared straining, which is much cheaper to manufacture, which is much much more durable and robust than the known devices, is easier to keep clean and to keep clean or is light in weight. , and in which it is easier to replace the generator parts. In addition, the generator achieves a more even distribution of the law and thus enables more efficient regulation for the emission of different quantities of heat per unit of time.

Vid uppfinningen nar man dessa fordelar medeist en ny brannarekonstruktion, vilken innehaller en brannare i form av ett fin maskigt plant nat i form av en skarm. Vid denna alstras en lag mantelformad laza Over brannareskarmens hela yta, och ovanfor skârmen ligger stromningsomkastare i form av en ytterligare skarm. Den sistnamnda skarmen, nedan kallad omkastareskarmen, ãr anordnad ovanfor lagans mantelyta, sit att den icke direkt kontaktas av agan. Varme reflekteras av omkastareskarmen tillbaka mot brannareskarmen, sit att denna lattare kan bringas till glodande tilistand. Brannareskarmen Or sit anordnad, att den kan expandera i sidoriktningen eller sammandraga sig i beroende av dess temperaturvariationer, men den kommer darvid att forbliva plan och Over hela sin yta och denna kommer att ligga pa samma avstand fran den ovanfOr liggande omkastareskarmen. Med denna anordning kan man halla temperaturen Over hela brannareskarmen alldeles osedvanligt nara konstant, nagot som ar erforderligt fOr att man skall kunna driva brannaren med optimal effekt, nagot som icke skulle ha kunnat astadkommas, oin skarmen hade varit fixerad vid sina kanter eller andar. In the invention, when these advantages are obtained, a new burner reconstruction is included, which contains a burner in the form of a fine masked planar net in the form of a screen. This creates a layer of mantle-shaped laza over the entire surface of the burner screen, and above the screen is a flow inverter in the form of an additional screen. The latter screen, hereinafter referred to as the diverter screen, is arranged above the mantle surface of the layer, so that it is not directly contacted by the discipline. Heat is reflected by the reversing arm back against the burner arm, so that this lighter can be brought to a glowing state. The burner screen is arranged so that it can expand in the lateral direction or contract depending on its temperature variations, but it will then remain flat and over its entire surface and this will be at the same distance from the overhead screen above. With this device you can keep the temperature over the entire burner screen unusually close to constant, something that is necessary to be able to operate the burner with optimal power, something that could not have been achieved, without the screen having been fixed to its edges or spirits.

Det Or darfor tydligt, att brannaren enligt uppfinningen innebar avsevarda fordelar, vilka bland annat besta I faljande; En ytterligt likformig temperatur uppkommer Over hela brannarens yta; brannaren kan hallas i drift under mycket lang tid, trots att dess temperatur ligger avsevart Over vad som kunnat uppnas vid hittills brukliga brannare av motsvarande slag; brannaren bar i tillagg hdrtffl mycket hog verkningsgrad och effekt; bran- 2--- — naren är funktionsduglig mom ett variationsomrade for bransletrycket, som ãr mycket stort, och.forhallandet mellan luft och bransle kommer joke att variera namnvart inom hela detta omra.de; sjalva brannarehuvudet kan latt sOndertagas i sina bestandsdelar. It is therefore clear that the burner according to the invention entailed considerable advantages, which include the following; An extremely uniform temperature arises over the entire surface of the burner; the burner can be kept in operation for a very long time, despite the fact that its temperature is considerable above what has been achieved with hitherto customary burners of a similar kind; the burner in addition hdrtffl very high efficiency and power; the burner is the range of variation for the industry pressure, which is very large, and the relationship between air and industry will, of course, vary considerably throughout this area; the burner head itself can be easily decomposed into its constituents.

Foreliggande uppfinning avser salunda en generator for infraroda stralar, vilken bestar av ett holje, -vilket innehaller en brannareoppning, vidare medel for tillforande av bransle till det lure av holjet och slutligen for fordelning mom holjet. The present invention thus relates to a generator for infrared rays, which consists of a housing, which contains a burner opening, further means for supplying fuel to the lure of the housing and finally for distribution among the housing.

Enligt uppfinningen är en plan brannareskarm med fina maskor i forening med ett stodgaller med grova maskor anordnad att stracka sig Over brannareoppningen och placerad pa holjet pa sadant salt, att den kan utvidga sig och sammandraga sig utan att forlora sin plana form. According to the invention, a flat burner screen with fine meshes in combination with a support grid with coarse meshes is arranged to extend over the burner opening and placed on the housing on such a salt that it can expand and contract without losing its flat shape.

Ytterligare fordelar och detaljer av uppfinningen koxnma att framga av foljande beskrivning av tvä olika utfOringsformer av uppfinningen i anslutning till bifogade ritningar, pa vilka fig. 1 visar en vertikalsektion genom mittplanet av en forsta utforingsform -av en generator for infrarod straining enligt uppfinningen, medan fig. 2 visar samma generator ovanifran, och fig. 3 Or en perspektiTisk bild i sa kallad sa.rad.>) framstallning av samma generator. Fig. 4 visar en annan utforingsform av uppfinningen i vertikal langd"sektion genom mittplanet, medan fig. 5 visar samma anordning frau linden, och fig. 6 visar den ovanifran. Fig. 7 visar en i anordningen inghende samlingskammare, och fig. 8 visar en sektion efter linjen 8-8 i fig. 7. Fig 9 visar sjalva brannareskarmen, och fig. 10 visar brannareskarmen fran anden. Fig. 11 och 12 visa slutligen motsvarande bilder av den hopmonterade brannareskarmen. Further advantages and details of the invention will become apparent from the following description of two different embodiments of the invention in conjunction with the accompanying drawings, in which Fig. 1 shows a vertical section through the center plane of a first embodiment of an infrared radiation generator according to the invention, Fig. 2 shows the same generator from above, and Fig. 3 is a perspective view in so-called sa.rad.>) Representation of the same generator. Fig. 4 shows another embodiment of the invention in vertical longitudinal section through the central plane, while Fig. 5 shows the same device from the linden, and Fig. 6 shows it from above. Fig. 7 shows a collecting chamber included in the device, and Fig. 8 shows a section along line 8-8 of Fig. 7. Fig. 9 shows the burner screen itself, and Fig. 10 shows the burner screen from the spirit, Figs. 11 and 12 finally show corresponding pictures of the assembled burner screen.

Ph ritningarna hava enahanda delar genomgaende betecknats med samma hanvisningsbeteckning. Brannaren innehaller ett hOlje, "vilket kan vara framstallt av nagot gjutbart material oeh vilket bestar av batten 10, sidovaggarna 11, en bakvagg 12 och en inloppsvagg 13. Pa sin ovre sida ãr hOljet oppet. Det forsett med en plan flans 14 med bussningar 15 ph undersidan av flan.sen for upptagande av skruvar 65, vilka kunna vara inskruvade i gangor i bussningarna under halen 16. II51jet under flansen 14 bildar ett samlingsrum. The ph drawings have uniform parts throughout been denoted by the same reference numerals. The burner contains a housing, which may be made of some castable material and which consists of the bat 10, the side cradles 11, a rear cradle 12 and an inlet cradle 13. On its upper side the housing is open. It is provided with a flat flange 14 with bushings 15 The underside of the flange for receiving screws 65, which may be screwed into passages in the bushings under the tail 16. The surface under the flange 14 forms a collection space.

Ingangsanden pa holjet är forsedd med en oppning 20, vilken kommunicerar med ett venturiror 21, vilket Or ingjutet sasom en inghende del i botten pa holjet. Ph vardera sidan om oppningen 20 finnas ett par bussningar 23, anordnade att uppbara ett oh 24, vilket Mlles anspant mot bussningarna med hjalp av skruvar, sum lopa fritt genom oket och genom gangling aro fasta i hal i bussningarna. Oket ar forsett med en gangad mitt-del 26 -fOr upptagande av insatsen med branslemun stycket 27. For detta andamal är den centrala delen av oket avrundat utvidgad, sa att en tillnarmelsevis ringformad yta riktas mot det hall, dar brdnslet matas in. Denna yta blir tillnarmelsevis ilk en sfarisk kalott, sasom exempelvis framgar av fig. 1. Andamalet harmed ãr att man skall undvika turhulens av branslet och luften, att man skall Oka den uppbaran.de ytan for munstycket och att man skall Oka inloppsytan for luften ovanfor resp. nedanfor oket. The entrance spirit on the housing is provided with an opening 20, which communicates with a venturi 21, which is molded as an integral part in the bottom of the housing. On each side of the opening 20 there are a pair of bushings 23, arranged to support an oh 24, which Mlles tightens against the bushings by means of screws, which run freely through the yoke and by gangling are fixed in slippery in the bushings. The yoke is provided with a stepped central part 26 - for receiving the insert with the industry mouthpiece paragraph 27. For this purpose, the central part of the yoke is rounded extended, so that an approximately annular surface is directed towards the hall where the fuel is fed. This surface becomes approximately like a spherical cap, as can be seen, for example, in Fig. 1. The purpose here is to avoid the turbulence of the fuel and the air, to increase the exposed surface of the nozzle and to increase the inlet surface of the air above resp. below the yoke.

Man inser harav, att munstycket kan utbytas, exempelvis vid utprovning av ett mullstycke av Iamplig halstorlek, och att det kan installas i mdalled med hjalp av gangorna. It will be appreciated that the nozzle may be replaced, for example, when testing a mouthpiece of suitable neck size, and that it may be installed in a modular manner with the aid of the passages.

En. av tradnat utford skarn]. 28 kan exempelvis hava formen av en andlos slinga av detta nat. Oct Hiles pa sin plats genom att det fjadrande omgriper de yttre kanterna eller hornen av bussningarna 23. Skarmen kan ersattas med en remsa, som lindas kring bussningarna och som halles pa sin plats med hjalp ,av en lampligt formad ldammer eller fasttrad. Den kan eventuellt till och med besta av ett stycke av en metall med genomgaende, riklig porositet. Skarmen Or anordnad omedelbart framfor oket 24, sasom framgar air fig. 1. One. of tradnat challenge skarn]. 28 may, for example, be in the form of a breathless loop of this nat. Oct Hiles in place by the resilient circumference of the outer edges or horns of the bushings 23. The screen can be replaced by a strip, which is wrapped around the bushings and which is held in place with a help, by a suitably shaped ldammer or fastened. It may even consist of a piece of metal with continuous, abundant porosity. The screen Or is arranged immediately in front of the yoke 24, as shown in Fig. 1.

I det lure av holjet Oro vaggarna forsedda med en konsol BO, vilken &tracker sig runt om innervaggen pa holjet p5. obetydligt avstand fran dess ovre kant. Denna konsol kan vara formad pa nagot lampligt att. In the lure of the casing Oro the cradles are provided with a bracket BO, which & tracts around the inner cradle on the casing p5. insignificant distance from its upper edge. This console can be shaped in any convenient way that.

En platformad bransleblandningsskarm 32 Or anbragt pa konsolen. Foretradesvis Or denna plat tillrackligt stor for att anligga mot holjets vaggar ovanfor konsolen sã dikt, att nagra andra organ for fastande av skarmen 32 icke Oro erforderliga. Men om det skulle visa sig erforderligt, kan skarmen 32 naturligtvis vara fast med sarskilda medel sasom skruvar eller dylikt. A platformed fuel mixing screen 32 Or mounted on the console. Preferably, this plate is large enough to abut against the cradles of the housing above the bracket so that no other means of securing the screen 32 is required. However, should it prove necessary, the arm 32 may, of course, be fixed by various means such as screws or the like.

Det liar visat sig lampligt att sasom sadan skarm 32 anvanda ett stycke av en plan metallplat. Mango lampliga slag av sadan skarm aro kanda. Man bor emellertid efterstrava, att bryggorna mellan de i skarmen anordnade halen skola vara sa breda, att de giva god skarmning och satntidigt bidraga till en jamn fordelning air bransleblandningen genom Mien och en utjamning av gasblandningens strainning pa. utsidan av skarmen. liven om ovan en skarm liar beskrivits, som liar samma utstrackning som oppningen uppat pa holjet men Or skild Iran detta holjes plan, sa. att den ligger nagot langre ned, inser fackmannen, att andra slag av skarmar med fordel Oven kunna anvandas, sa lange man med deras hjalp nar en jamn fordelning av bransleblandningen under brannare- eller generatorskarmen. Man kan salunda f Or skarmen 32 anvanda platar av allehanda olika form och storlek. It has been found appropriate to use such a screen 32 as a piece of a flat metal plate. Mango lamply kind of such a screen aro kanda. One should strive, however, that the bridges between the tails arranged in the screen should be so wide that they provide good shielding and at the same time contribute to an even distribution of the fuel mixture through the mine and an equalization of the gas mixture straining on. the outside of the screen. life if above a screen liar described, which liar the same extent as the opening up on the holjet but Or separate Iran this holjes plan, so. that it is a little further down, the person skilled in the art realizes that other types of screens can be used to advantage. You can thus use plates of all kinds of different shapes and sizes.

Pa. Oversidan av flansen 14 Or en forsta om- — —3 kastare- eller sakerhetsskarm 40 av tradnat eller vav anordnad. Lampligen kan denna skfirm vara av standardmaskvidd 40 (40 maskor pr eng. turn) och traden hava en diameter av 0,25 mm. Den fria ytan mellan tradarna kommer dä att utgara 36 % av den sammanlagda ytan pa skarmen. Skarmens tradmaterial kan vara utbildat av vilken Iamplig me-tall som heist. Sarskilt lampligt har det visat sig att for detta andamal anvAnda jarntrad eller trad av rostfritt stal. Pa. The upper side of the flange 14 Or a first re- - —3 3 thrower or safety guard 40 of threaded or wavy arrangement. This lamp can be of standard mesh size 40 (40 stitches per turn) and the thread has a diameter of 0.25 mm. The free area between the wires will then constitute 36% of the total area on the screen. The screen's trad material can be formed by any suitable metal. It has been found to be particularly appropriate to use iron wire or stainless steel wire for this purpose.

For att pressa omkastareskarmen 40 mot flansen 11 anvander man en rektangular ram, som innehaller en packning, vilken kan utfaras av asbest, flagon mjuk metall eller vilket annat lampligt varmemotstandskraftigt material som heist. Packningen Or forsedd med iippningar 16a, svarande mot oppningarna 16 fOr upptagande air skruvar, vilka visats i fig. 2. To press the reversing arm 40 against the flange 11, a rectangular frame is used, which contains a gasket which can be made of asbestos, flake soft metal or any other suitable heat-resistant material such as a lift. The gasket Or is provided with openings 16a, corresponding to the openings 16 for receiving air screws, which are shown in Fig. 2.

Narmast ovanfor packningen är anordnad en metallisk, gallerformad ram 43, vilken Or laminerad till sin konstruktion och bestar av en undre del 43a med en fOnsterliknande oppning 44, och en ovre del 43b med en nagot starre Oppning 45. Pa detta satt astadkommes ett uppatriktat, rektangulart sate far upptagande av brannareskarmen i genera-torn. Closest above the gasket is arranged a metallic, lattice-shaped frame 43, which is laminated to its construction and consists of a lower part 43a with a window-like opening 44, and an upper part 43b with a slightly more rigid opening 45. In this way an upright, rectangular sate receives the burner screen in the generator tower.

Denna brannareskarm 50 bestar av vav med fina maskor. Det är av sarskild betydelse far verkan av uppfinningen, att brannareskarmen 50 är i huvudsak identiskt utbildad med omkastareskarmen. Anledningen hartill kommer att framga av det fdljande. I overensstammelse darmed har man aven gjort brannareskarmen av 40-maskig natvav med en oppen yta av 36 % av den totala ytan. Kanterna pa brannareskarmen 50 aro omvikta kring ett stod- eller strackningsgaller 51, vilket kan utgOras av ett stelt stycke av tamligen stora maskor, foretradesvis med ett standardmasktal av 8 a 10. Den finmaskiga brannareskarmen och den grovmaskiga stodskarmen kunna bilda en enhetlig konstruktion, som vilar satet 46 och kvarhalles i detta lage av en pressram 54. Denna pressram 54 bestar av en rektangular ram av tillracklig vidd fOr att tacka ramen 43 jamte satet 46. Den Sr forsedd med en appning 55 som har samma utstrackning som oppningen 44 i ramen 43. Ramarna 43 och 54 bilda salunda tillhopa fasthallningsorganen for brannareskarmen 50-51. Likaledes Oro de tva ramarna 43, 54 farsedda med skruvhal 16b resp. 16c i overensstammande lage med de redan omnamnda Mien 16 och 16a, sa att de gemensamt kunna upptaga skruvarna. This burner screen 50 consists of hubs with fine meshes. It is of particular importance to the effect of the invention that the burner arm 50 is substantially identically formed with the reversing arm. The reason for this will be apparent from the following. Accordingly, the burner screen has also been made of 40-mesh wet cloth with an open area of 36% of the total area. The edges of the burner frame 50 are folded around a support or stretching grid 51, which may consist of a rigid piece of rather large meshes, preferably with a standard mesh number of 8 to 10. The fine-mesh burner frame and the coarse-mesh support frame may form a uniform construction, which rests sat 46 and retained in this layer by a press frame 54. This press frame 54 consists of a rectangular frame of sufficient width to thank the frame 43 as well as the sat 46. It is provided with an opening 55 which has the same extent as the opening 44 in the frame 43. The frames 43 and 54 thus together form the holding means for the burner arm 50-51. Likewise, Oro the two frames 43, 54 fitted with screw tail 16b resp. 16c in accordance with the already mentioned Mien 16 and 16a, so that they can jointly accommodate the screws.

Aggregatet av brannareskarmen, bestaende av den egentliga, finmaskiga brannareskarmen 50 och det kraftigare, med stone maskor forsedda stodgallret 51, Sr bade i langdriktningen och i tvarriktningen smalare an Oppningen 45 i ramen 43, i vilken den Sr anbragt. The assembly of the burner arm, consisting of the actual, fine-mesh burner arm 50 and the heavier, stone-meshed support grid 51, is both longitudinally and transversely narrower than the opening 45 in the frame 43, in which it is placed.

Ehuru brannareskarmsaggregatet sMunda in-, passas tatt mellan ramarna 43 och 54, hindras, det icke fran att utfora en glidningsrorelse inom ramen, da den utvidgar sig eller sammandrages pa grund av temperaturforandringar. Brannareskarmsaggregatet Sr dadar i stand till expansion och kontraktion i sitt eget plan vid temperaturvariationer utan att det forlorar sin. form. Detta Or ytterst betydelsefullt far funktionen av anordningen enligt foreliggande uppfinning, sasom nedan kommer att forklaras. Although the burner arm assembly may be fitted between frames 43 and 54, it is not prevented from performing a sliding motion within the frame as it expands or contracts due to temperature changes. The burner arm unit Sr is capable of expansion and contraction in its own plane at temperature variations without losing its. form. This is extremely important for the operation of the device according to the present invention, as will be explained below.

Sasom redan omnamnts, har brannareskarmen 50 i likhet med omkastareskarmen 40 vid den beskrivna utforingsformen en appen yta mellan tradarna av 36 % av den totala ytan pa vederborande skarm. Praktiska forsok ham a givit vid handen, att denna proportion mellan oppen yta och total yta ger optimal verkningsgrad, darfar alt ytan Sr sa Ii-ten, att bransletrycket icke kan bliva kritiskt, I vilket fall lagan skulle kunna bliva utsatt for bakslag och. brinna bakom brannareskarmen. Samtidigt foreligger det icke na.got vasentligt tryck bakom brannareskarmen. Proportionerna mellan appen yta och total yta hos brannareskarmen kan givetvis avvika nSgot litet frau det angivna vardet av 36 %, men man bar dock giva akt pa att de ovan angivna forbranningsegenskaperna skola upp-, ratthallas. As already mentioned, the burner arm 50, like the reversing arm 40 in the described embodiment, has an open area between the wires of 36% of the total area of the adjacent screen. Practical experiments have shown him that this proportion between open area and total area gives optimal efficiency, so that the surface Sr said Ii-ten, that the industry pressure can not be critical, In which case the law could be subject to setbacks and. burn behind the fire screen. At the same time, there is no significant pressure behind the burner screen. The proportions between the app area and the total area of the burner screen can of course deviate slightly from the stated value of 36%, but care should be taken that the above-mentioned combustion properties should be maintained.

Diametern pa den trad, av vilken brannareskarmen Or framstalld, Sr tiilrSekligt liten (1 det f8revarande fallet 0,25 mm) for att luftkylning p5. baksidan av brannareskarmen 50 skall halla temperaturen darstades under flampunkten far bransleblandningen. Harigenom undviker man baktandning. The diameter of the wire from which the burner screen is made is particularly small (in the present case 0.25 mm) for air cooling. the back of the burner screen 50 should keep the temperature below the flash point of the fuel mixture. This avoids back-toothing.

Pressramen 54 for kvarhallande av brannareskarmen 50, 51 Sr forsedd med ett par upp- Orflansar 57, vilka lopa i brannarenk langdriktning p5. var sin sida av appningeri 55 i denna pressram. De ara anordnade far att upptaga och kvarhalla reflektorskarmen 60, vilken Sr av betydligt vidare maskvidd an den egentliga brannareskirmen 50, t. ex. 6 till 10 maskor pr turn. Reflektorskarmen 60 Sr farsedd med nedat riktade flansar 61, som, Oro lampade att omgripa de yttre ytorna flansarna 57. Hajden pa flansarna 57 bestanamer avstandet for reflektorskarmen 60 ovan, f8r brannareskarmen 50, 51. Reflektorskarmen 60 kvarhalles i sitt lage medelst lampliga fastorgan, vilka exempelvis kunna utgoras av enkla saxsprintar, vilka stracka sig genom skarmens maskor och genom hal 59 i flartsarna 57. The press frame 54 for retaining the burner frame 50, 51 Sr is provided with a pair of up-flanges 57, which run in the longitudinal direction of the burner p5. each side of appningeri 55 in this press frame. They are arranged to receive and retain the reflector screen 60, which is of considerably wider mesh size than the actual burner screen 50, e.g. 6 to 10 stitches per turn. The reflector arm 60 is provided with downwardly directed flanges 61 which, in order to illuminate the outer surfaces, engage the flanges 57. The height of the flanges 57 determines the distance of the reflector arm 60 above, in front of the burner arm 50, 51. The reflector arm 60 is retained for example, may consist of simple scissor pins, which extend through the meshes of the screen and through hall 59 in the flats 57.

Skruvarna 65 halla samman hela aggregatet darigenom att de aro inskruvade i busSningarna 15 och stracka sig genom Hien 16a —16c med skallarna vilande mot den ovre pressramen 54. The screws 65 hold the entire assembly together by screwing it into the bushings 15 and extending through the Men 16a-16c with the skulls resting against the upper press frame 54.

Anordningen fungerar pa faljande satt: Eft lampligt bransle drives genom bransle- 4.— — mUnstycket 27 i fin stromning in i det rum, som omgives av tradnitsskarmen 28. Detta foranleder, att ren luft blandas med branslet och tillfores strypoppningen i venturiroret 21 I ratt forhallande for astadkommande av en effektiv bransleblandning. Branslet passerar darefter tillsammans med luften iii i venturiroret 21, dar blandningen mellan gas och luft homogeniseras. Venturiroret 21 stravar aven att minska hastigheten pa gasblandningen utan att darvid alstra nagot baktryck vid venturistrypstallet. Blandningen passerar vidare frau venturiroret till samlingsrummet under bransleblandningsskarmen 32, vilket leder till en jamn fordelning av blandningen i rummet och en ytterligare minskning av rorelsehastigheten. Pa detta satt astadkommes en jamn sammansattning av gasblandningen, over hela onikastareskarmens 40 yta. Darefter passerar branslet upp genom omkastareskarmen 40, stodgallret 51 och brannareskarmen 50 och antandes pa yttre ytan av brannareskarmen. 50. Branslet forbrinner pa sjalva ytterytan av denna skarm. Om trycket i munstycket är ratt instant, skall det antanda branslet giva upphov till en Na, i stort sett oavbruten mantelformad laga, sammansatt av mycket sma punktlagor, som aro jamnt fordelade Over hela brann.areskarmens 50 :vta. Kontinuiteten av denna mantel•av lagor understodjes av den omstandigheten, att den fina brannareskarmen innehaller ett mycket stort antal oppningar, som ligga mycket tatt intill varandra. Det foreligger en. tendens hos ytan pa brannareskarmen 50 att uppvarmas, och denna ten-dens utnyttjas sa tillvida, som brannareskarmen harigenom kommer att bliva en mycket effektiv radiator av vane. The device operates as follows: After suitable fuel is driven through the fuel nozzle 27 in a fine flow into the room surrounded by the traditional screen 28. This causes clean air to mix with the fuel and be supplied to the throttle in the venturi 21 in the steering wheel. conditions for achieving an efficient industry mix. The fuel then passes together with the air iii in the venturi 21, where the mixture between gas and air is homogenized. The venturi 21 also strives to reduce the speed of the gas mixture without generating any back pressure at the venturi pressure station. The mixture further passes from the venturi to the assembly chamber below the fuel mixing arm 32, which results in an even distribution of the mixture in the chamber and a further reduction in the rate of movement. In this way an even composition of the gas mixture is achieved, over the entire surface of the onikastar screen 40. Thereafter, the fuel passes up through the reversing arm 40, the support grid 51 and the burner arm 50 and ignites on the outer surface of the burner arm. 50. The fuel burns on the very outer surface of this screen. If the pressure in the nozzle is instantaneous, the igniting fuel should give rise to a Na, largely uninterrupted mantle-shaped layer, composed of very small point layers, which are evenly distributed over the entire fire arm 50: vta. The continuity of this mantle • of layers is supported by the fact that the fine burner frame contains a very large number of openings, which lie very close together. There is one. tendency of the surface of the burner screen 50 to be heated, and this tendency is utilized to the extent that the burner screen will thereby become a very efficient radiator of habit.

Few att ytterligare forbattra forbranningstemperaturen pa ytan av brannareskarmen 50 är reflektorskarmen 60 anordn.ad pa ungefar 5 till 12 mm avstand Over brannareskarmen 50. Reflektorskarmen 60 a" anordnad pa ett litet avstand fran lagornas spetsar fOr att säkerstalla att fullstandig forbranning kommer till stand. Den verkar som ett sorts spjall fOr strypning av strommen av varma gaser, sa att de icke skola spolas bort alltfor snabbt, samtidigt som den verkar som en reflektor for aterkastande av de infraroda stralarna mot brannareskarmen 50 for hojande av dennas temperatur. To further improve the combustion temperature on the surface of the burner arm 50, the reflector arm 60 is arranged at a distance of about 5 to 12 mm above the burner shield 50. The reflector arm 60 is arranged at a small distance from the tips of the layers to ensure complete combustion. acts as a kind of throttle for throttling the current of hot gases, so that they should not be flushed out too quickly, while acting as a reflector for reflecting the infrared rays towards the burner screen 50 to raise its temperature.

Under dessa forhallanden kan man reglera stralningsgeneratorns effekt genom strypning av bransletillforseln, sa att varmestralningen Wier varje onskad fargfunktion Mom spektrum fran svart vid ungefar 485°C till gulf vid ungefar 980°C, utan att fara fOreligger fOr bakslag av lagan. Under these conditions, the power of the radiation generator can be regulated by restricting the supply of fuel, so that the heat radiation Wier each desired color function Mom spectrum from black at approximately 485 ° C to gulf at approximately 980 ° C, without danger of setbacks of the law.

Till detta b6r laggas, att varmen avgives dels direkt fran reflektorskarmen 60, dels aven fran brannareskarmen 50 tvars igenom reflektorskarmen 60. To this should be added that the heat is dissipated partly directly from the reflector arm 60 and partly also from the burner arm 50 across the reflector arm 60.

Dâ denna brannare befinner sig i funktion, befinner sig brannareskarmen 50 pa en betydligt mycket hogre temperatur an reflektorskarmen 60. Sjalva brannareskarmen 50 kommer darfor att i forsta hand representera radiatorelementet. Den ytterligt hoga temperaturen, vid vilken brannareskarmen 50 arbetar, beror pa forefintligheten av reflektorskarmen 60, vilken aterkastar varme tillbaka till brannareskarmen 50 och darigenom stegrar dennas temperatur till gloclande tillsthnd. When this burner is in operation, the burner screen 50 is at a much much higher temperature than the reflector frame 60. The burner screen 50 itself will therefore primarily represent the radiator element. The extremely high temperature at which the burner arm 50 operates is due to the presence of the reflector arm 60, which reflects heat back to the burner arm 50 and thereby increases its temperature to a glowing state.

En sadan funktion av brannareskarmen 50 under glodning skulle i praktiken vara omOjlig, om man hade anordnat omkastareskarmen 40 omedelbart under brannareskarmen 50. Sasom redan papekats, ãr emellertid denna omkastareskarm 40 av i stort sett samma maskvidd som brannareskarmen 50, och den kommer darigenom att i stor utstrackning forhindra att varme stralar fran den. gloclande brannareskarmen 50 tillbaka till samlingsrummet, vilket skulle kunna leda till att fOrbranning agde ruin redan 1 samlingsrummet. Om omkastareskarmen 40 yore av avsevart vidare maskvidd an brannareskarmen 50, dvs. omden hade en stOrre procentuell andel fri yta mellan sina tradar, sa skulle en avsevard varmemangd komma att strala tillbaka fran brannareskarmen 50 och genom omkastareskarmen 40 till samlingsrummet med darav f5ljande sannolikhet for att forbranning skulle forekomma darstades. Om omkastareskarmen 40 a andra sidan hade avsevart finare raaskor an brannareskarmen 50, dvs. omdess fria ytor yore avsevart mycket mindre i procentuellt matt, sh skulle den latt kunna leda till uppkomsten av ett bakatverkande tryck, vilkei skulle hava ofulls Land% forbranning till folj d. Such a function of the burner arm 50 during annealing would in practice be impossible if the reversing arm 40 had been arranged immediately below the burner arm 50. As already stated, however, this reversing arm 40 is of substantially the same mesh size as the burner arm 50, and it will thereby extensively prevent heat rays from radiating from it. glaring burner arm 50 back to the assembly room, which could lead to combustion already ruining the assembly chamber. If the diverter arm 40 is of considerably wider mesh width than the burner arm 50, i.e. if it had a larger percentage of free space between its trades, then a considerable heat mantle would radiate back from the burner screen 50 and through the reversing screen 40 to the assembly room with the consequent probability that combustion would occur there. If the reversing arm 40 on the other hand had considerably finer noise than the firing arm 50, i.e. if free surfaces yore considerably much less in percentage matte, sh it could easily lead to the emergence of a retroactive pressure, which would have incomplete Land% combustion to folj d.

Med den sarskilda typ av brannareskarm 50, som anvandes i den nu beskrivna brannaren, an det icke nodvandigt att man fOrlitar sig pa den hastighet, med vilken lagorna fortplanta sig, for reglering av effekten. Det är clarfOr mOjligt att lta brannaren arbeta med temperaturer Over hela spektrum fran 485°C till 980°C helt enkelt genom installning av trycket pa det tillforda branslet. With the special type of burner shield 50 used in the burner now described, it is not necessary to rely on the speed at which the laws propagate to control the power. It is possible to allow the burner to operate at temperatures across the entire spectrum from 485 ° C to 980 ° C simply by installing the pressure on the supplied fuel.

En annan betydelsefull synpunkt pa fOreliggande uppfinning ligger i den omstandigheten, att strypstallet i venturiroret 21 for tillforandet star helt Oppen utan hindrande organ for insugning av primarluft till hrannaren. Det finns intet tillslutningsorgan eller nagot spjall, som skulle kunna verka hindrande for insugnin.gen av luft genom venturiroret 21. Av denna anledning insuges standigt ratt kvantitet luft i brannaren, dvs. den kvantitet luft, som exakt racker till f8r astadkommande av den laga manteln av lagor pa brannareskarmen 50, och brannareskarmen 50 uppvarmes till en hogre temperatur an som an-sags mojligt vid de tidigare kanda anordningarna, som arbetade med atmosfarsbrannare eller lagtrycksbrannare. Vid normal drift — — kan brannaren enligt fOreliggande uppfinning anvandas vid sã hog temperatur som 980°C under obegransad lid. Dartill kommer att fOrhi1andet mellan bransle och luft forblir konstant i stort sett over ett mycket stort omrade av bransletryck, mom vilket brannaren nor-malt kommer att arbeta. Alit som är erforderligt for minskande av arbetstemperaturen pa brannaren och •darigenom av den avgivna varmeeffekten vid brannarens reglering ãr darfor aft minska tillforseln av bransle, och det foreligger joke flagon fara for att bakforbranning skall komma till stand vid sadan nedstrypning av tillfiirt bransle pa grund av den tamligen obetydliga yta i brannareskarmen 50, som Or oppen. Another important point of view of the present invention lies in the fact that the throttle in the venturi 21 for the supply is completely open without obstructing means for sucking in primary air to the crane. There is no closing means or any throttle which could prevent the intake of air through the venturi 21. For this reason, a constant amount of air is sucked into the burner, ie. the quantity of air which exactly racks to produce the right mantle of layers on the burner screen 50, and the burner screen 50 is heated to a higher temperature than is possible with the prior art devices which worked with atmospheric burners or low pressure burners. During normal operation - - the burner according to the present invention can be used at a temperature as high as 980 ° C for an unlimited period. In addition, the relationship between fuel and air remains constant largely over a very large range of fuel pressure, which the burner will normally operate. All that is necessary to reduce the working temperature of the burner and • thereby of the heat output emitted by the burner regulation is therefore to reduce the supply of fuel, and there is a joke flagon danger that backburn will occur in such throttling of supplied fuel due to the rather insignificant surface in the burner frame 50, as Or oppen.

En annan i praktiken betydelsefull fOrdel med en konstruktion enligt foreliggande uppfinning bestar i att hela brannarekonstruktionen, bestaende av ramen 43, pressramen 54, omkastareskarmen 40, brannareskarmen 50, 51 och reflektorskarmen 60 kan tagas Isar men likval Or uttagbar som en enhet fran brannarens holje 10, 11, 12, om den skall ersattas oiler undersokas. Another practically significant advantage of a structure according to the present invention is that the entire burner structure, consisting of the frame 43, the press frame 54, the reversing arm 40, the burner arm 50, 51 and the reflector arm 60 can be taken apart but removable as a unit from the burner housing 10. , 11, 12, if it is to be replaced oiler examined.

Efterhand som brannareskarmsaggregatet 50, 51 uppvarmes, utvidgar det sig Ot sidorna mom den kanal, sonn bildas mellan pressramen 54 och ramen 43. Wan fri sidoexpansionsrorelse mOj iiggOr, att brannareskarmen 50 forblir plan och salunda kommer att ligga pa samma avstand fran den ovanfor belagna reflektorskramen 60 Over hela sin yta. Pd grund av derma nya anordning ernar man en alldeles osedvanlig konstant temperatur Over hela ytan pa brannareskarmen 50, vilket i hog grad bidrager till en fiirdelaktig funktion hos brannaren. As the burner arm assembly 50, 51 heats up, it expands to the sides of the channel formed between the press frame 54 and the frame 43. When free side expansion motion may occur, the burner arm 50 remains flat and will thus be at the same distance from the above-reflected reflector. 60 Over its entire surface. Due to this new device, a very unusual constant temperature is obtained over the entire surface of the burner screen 50, which greatly contributes to a favorable function of the burner.

I fig. 4-12 har en annan utforingsform av uppfinningen visats, vid vilken forefinnes ett holje, som Or forsett med en underdel 110 och en trappstegsformigt upplyft del 110a, och som har vertikala sidovaggar 111. Givetvis finns Oven en frontv5gg 112 och en bakvagg 113. Hela detta holje bildar salunda ett samlingsrum. Den undre delen darav har en nagot uppal lutande botten, sit som exempelvis framgar av fig. 4. Holjets ovre del Or forsedd med en at sidorna utskjutande flans 114, vilken pa salt, som kommer att framga ,av det foljande, uppbar generatordelen. Figs. 4-12 show another embodiment of the invention, in which there is a housing, which Or is provided with a lower part 110 and a step-shaped raised part 110a, and which has vertical side cradles 111. Of course there is also a front wall 112 and a rear cradle. 113. This whole casing thus forms a meeting room. The lower part thereof has a slightly inclined bottom, which is shown, for example, in Fig. 4. The upper part Or of the housing is provided with a flange 114 projecting at the sides, which on salt, which will appear, from the following, carried the generator part.

Frontvaggen 112 Or forsedd med en ingangseppning 120 for ett -venturiror 121. Detta ror är lampligen forsett med sadana anordningar, att det kan gjutas i ett styeke med holjet, men om sk skulle onskas, kan det givetvis Oven framstallas sasom en separat del. The front cradle 112 is provided with an entrance opening 120 for a venturi 121. This tube is suitably provided with such devices that it can be cast in a styeke with the housing, but if so-called desired, it can of course be manufactured as a separate part.

Ovanfor ingangsoppningen 120 for venturiraret Or en bus sning 114a anordnad, med vilken en andplat 123 Or fOrenad. Andplaten 123 stracker sig nedat pa lagona anpassat avstand frau ingangsoppningen 120, sh som Oven visas i fig. 4, och den har halvcirkelformad underkant 123a, se fig. 5. Kanterna pa. platen bereda ett sate for ett vin:dskydd 128, vilket kan besta av en remsa av tradnat, vars Ovre kanter dubbelvikts i egen riktning och fasts vid kanterna pa platen medelst skruvar. Above the entrance opening 120 for the venturi, a bushing 114a is provided, with which a duct plate 123 is connected. The duct plate 123 extends downwards at the lagoon adapted distance from the entrance opening 120, as shown above in Fig. 4, and it has a semicircular lower edge 123a, see Fig. 5. The edges on. the plates provide a seat for a wind protection 128, which may consist of a strip of wire, the upper edges of which are double-folded in their own direction and fastened to the edges of the plate by means of screws.

Mitt i denna andplat 123 i centrerat lage i forhallande till ingangsoppningen 120 an en anslutningsbussning 127 anordnad. Den kan t. ex. vara ingangad i andplaten 123. Den uppbar ett munstycke 127a som i sin tur Or inskruvat i anslutningsbussningen 127. Munstycket Or pa sedvanligt satt fOrsett med ett hal, vars storlek kan vara faststalld en gang fOr alla. Man kommer da i regel att finna, att man Mir hava tillgang till ett antal munstycken av inbordes nagot olika grovlek, sa att ett munstycke av den. ratta dimensionen kan utvaljas for erhallande av basta resultat. In the middle of this duct plate 123 in a centered position in relation to the entrance opening 120 of a connection bushing 127 arranged. It can e.g. be received in the duct plate 123. It bore a nozzle 127a which in turn Or is screwed into the connection bushing 127. The nozzle Or is usually provided with a hall, the size of which may be fixed once and for all. You will then usually find that you Mir have access to a number of nozzles of inboard slightly different coarseness, so that a nozzle of it. The steering wheel dimension can be selected to obtain the best results.

Sasom bast framgar av fig. 4-7 bildar hot-ten i hOljet vid foreningsstallet mellan delarna 110 och 110a en vertikal vagg, vilken star mitt for anden pa venturiroret 121. Man ser av fig. 7, att denna vagg har en kilformad profil med kileggen vand i vertikalriktningen i mitten av vaggen, mitt for utgangsoppningen fOr venturiroret 121. Pa vardera sidan om kileggen Oro tva halvcylindriska delar 110d utbildade. As can be seen from Figs. 4-7, the threats in the housing at the junction between the parts 110 and 110a form a vertical cradle, which is opposite the spirit of the venturi tube 121. It can be seen from Fig. 7 that this cradle has a wedge-shaped profile with the wedge water in the vertical direction in the middle of the cradle, in the middle of the exit opening for the venturi 121. On each side of the wedge Oro two semi-cylindrical parts 110d formed.

Ph vardera sidan om venturiroret Or botten fOrsedd med en lutande yta 110f av i huvudsak triangelform. Den lutar uppat och utat mot frontvaggen 112. Ph each side of the venturi or bottom provided with an inclined surface 110f of substantially triangular shape. It slopes upwards and outwards towards the front cradle 112.

Delen 110e skjuter upp Over bottens plan, fig. 4, och bildar ett stod 110e, fig. 7, pa vilket eu skarm 132, fig. 4 Or fast. Skarmen 132 Or utford av nagot genomgaende porost material, foretradesvis en metall, och har sadan bredd att den overspanner avstandet mellan holjets sidovaggar 11. Ena anden stracker sig anda in mot venturirOrets 121 mynning vid 132a, och den andra anden stracker sig Over bottenvaggen 110a och avslutas med en nedhangande lapp 132b. The part 110e projects above the plane of the bottom, Fig. 4, and forms a post 110e, Fig. 7, on which a screen 132, Fig. 4 is fixed. The screen 132 is challenged by a perforated porous material, preferably a metal, and is so wide that it spans the distance between the side cradles of the housing 11. One spirit extends inward toward the mouth of the venturi 121 at 132a, and the other spirit extends over the bottom cradle 110a and ends with a hanging patch 132b.

Flansen 114, vilken straeker sig runt Overdelen av holjet och i huvudsak liar rektangular form, bereder sate for generatordelarna. En packning 141, vilken kan vara av varje lampligt material, t. ex. asbest oiler annat mot varme motstandskraftigt material, vilar pa flansen 114 och utgor sate for generatorelementets ram, vilken vilar pa packningen 141. The flange 114, which extends around the upper part of the housing and is substantially rectangular in shape, provides the seat for the generator parts. A gasket 141, which may be of any suitable material, e.g. asbestos otherwise oils against heat-resistant material, rests on the flange 114 and forms the seat of the generator element frame, which rests on the gasket 141.

Generatorelementet, vilket visas i fig. 9 och 10, bestax av den nyss nananda ramen. Den bestar av tva delar, namligen en undre, rektangular ramdel 143 av metall, som har i stort sett samma form som flansen 114, och vilken Or forbunden med en smal rektangular ram-del 143a, och ovanpa denna vilar i sin tur en ytterligare ramdel 143b, vilken har samma bredd som bottenramen 143. Harigenom bildas en rektangular kanal i det lure av den mittersta ramen 143a samt mellan den ovre och den undre ramen 143 resp. 143b. Derma kanal stracker sig fangs den inre periferien av -- ramen och är avsedd for upptagande av generatordelarna. The generator element, as shown in Figs. 9 and 10, consists of the newly nananda frame. It consists of two parts, namely a lower, rectangular frame part 143 of metal, which has substantially the same shape as the flange 114, and which Or is connected to a narrow rectangular frame part 143a, and on top of this rests in turn an additional frame part 143b, which has the same width as the bottom frame 143. As a result, a rectangular channel is formed in the lure of the middle frame 143a and between the upper and the lower frame 143 resp. 143b. This channel extends to the inner periphery of the frame and is intended for receiving the generator parts.

Ur ekonomisk synpunkt kan det vara lampligt att utfora ramdelarna i ett sammanhang, sá som visas i fig. 9, vid yilken sidostyckena ramarna 143 och 143b stracka sig fram till kanterna och aro omvikta kring dessa, se 143b. Dessa andkanter stracka sig Over hela ramens bredd. Den mellersta, smala ramde- len 143a dr forsedd med sidostycken, som stracka sig utefter ramens hela langd, under det att dess andar Oro omvikta. I varje horn uppkommer darfor en overlappningsfog. Hela aggregatet av ramarna kan darefter fastas ihop genom punktsvetsning langs langsidorna och kortsidorna. From an economic point of view, it may be appropriate to design the frame parts in a context, as shown in Fig. 9, at which the side pieces the frames 143 and 143b extend to the edges and are folded around them, see 143b. These duck edges extend across the entire width of the frame. The middle, narrow frame part 143a there is provided with side pieces, which extend along the entire length of the frame, while its spirits are unfolded. In each horn, therefore, an overlap joint arises. The entire assembly of the frames can then be fastened together by spot welding along the long sides and the short sides.

Sidostyckena pa den Oversta ramdelen 143 Aro pa salt, som framgar av fig. 9 och 10, for- sedda med langdriktade flansar 143c pa in- sidorna, och dessa stracka sig uppat och utat i lutande laze. De kunna vara forsedda med iippningar 143d, fig. 4, for fastande ay reflek- torskarmen vid det &riga aggregatet ay slat-- mar pa satt, som nedan kommer att beskrivas, Ramaggregatet är forsett med ett flertal hal 145 lungs alla dess fyra sidor, anpassade after gangade hal i flansen 114, och skruvar 146, Oro inskruyade for att tatt fasta ramaggregatet mot flansen. The side pieces of the upper frame part 143 are on salt, as shown in Figs. 9 and 10, provided with elongate flanges 143c on the inside, and these extend upwards and outwards in an inclined laze. They may be provided with openings 143d, Fig. 4, for fastening the reflector arm to the other assembly in the manner in which, as will be described below, the frame assembly is provided with a plurality of hal 145 lungs all four sides thereof. adapted after-threaded hal in the flange 114, and screws 146, Oro screwed in to secure the frame assembly to the flange.

Brannareskarmen, fig. 11 och 12, innehaller en yttre skarm 150 av rektangelform, yars kantdelar 150a Oro omvikta langkanterna pa en spridareskarm 151 och en inre skarm 152, Langkanterna Oro darefter tatt ompressade, att aggregatet Mlles ihop, och den inre skarmen 152 sayal som spridareskarmen 151 hallas darigenom under spanning. Da aggregatet Or hopmonterat p0. detta salt, kommer hela enheten ay brannareskarmen att kunna inpassas i kanalen inom ramen 143. The burner arm, Figs. 11 and 12, contains an outer shield 150 of rectangular shape, the edge portions 150a of which are folded over the long edges of a spreader arm 151 and an inner shield 152. The long edge Oro is then repressed so that the unit is assembled, and the inner shield 152 the diffuser arm 151 is thereby inclined under tension. When the unit Or assembled p0. this salt, the whole unit ay the burner screen will be able to fit in the channel within the frame 143.

Den yttre skarmen 150 och den inre skarmen 152 kunna hava maskvidden 40, vilket innebar 40 maskor pr turn, och traddiametern kan vara 0,25 mm, varyid man erhaller en fri yta av 36 % av den totala ytan hos skar- men, liksom tidigare. Spridareskarmen 151, vilken utgOr stod for de ovriga skarmarna och hindrar dessa fran att bliva buckliga, kan hava maskvidden 10 och en. traddiameter av 0,6 a 0,7 mm. The outer screen 150 and the inner screen 152 may have a mesh size of 40, which means 40 meshes per turn, and the thread diameter may be 0.25 mm, varying a free area of 36% of the total area of the screen, as before. . The spreader arm 151, which is responsible for the other shields and prevents them from becoming dented, may have a mesh size of 10 and one. thread diameter of 0.6 to 0.7 mm.

FOr att hopmonteringen skall kunna aga rum latt, hava frail borjan andstyckena pa den vanstra sidan av ramen 143b, fig. 9, lake svetsats i hornen. Brannareskarmen kan dá skjutas in i kanalen, yarefter den vanstra anden pa ramen placeras i sitt lage och hor- nen forst darefter svetsas genom punktsvetsning, sO. att ramen fullbordas och hailer brannareskarmen pa sin plats. Tjockleken ph. de sammantryckta kantdelarna ay skar- men Or sO. vald, att den natt och jamnt later sig pressas in i kanalen. Harigenom blir det mojligt att satta in skarmen yid monteringen och likaledes att taga ut den, och dessutom medgives fri utvidgning eller sammandragning under anyandningen, sâ att yarmerorelserna fa frihet att utbilda sig. Harigenom sakerstalles det, att skarmen forblir plan, och dessutom forlanges dess liyslangd. For mojliggorande av denna funktion Oro bredden oak sarskilt langden av skarmen dimensionerade, att de icke fullt utfylla kanalen. Detta fraingar av fig. 4. In order for the assembly to take place easily, the open pieces on the left side of the frame 143b, Fig. 9, have been welded to the corners. The burner screen can then be pushed into the channel, after which the left end of the frame is placed in its position and the horns are only then welded by spot welding, sO. that the frame is completed and holds the burner screen in place. Thickness ph. the compressed edge parts ay the screen Or sO. chosen, that the night and evenly allow itself to be pressed into the channel. This makes it possible to insert the screen during assembly and also to remove it, and in addition, free expansion or contraction is allowed during the breathing, so that the arm movements have the freedom to form. In this way it is ensured that the screen remains flat, and in addition its light length is required. To enable this function, the width and especially the length of the screen are dimensioned so that they do not fully fill the channel. This is illustrated in Fig. 4.

Som redan namnts, Oro overdelen 143b pa ramen 143 f8rsedd med uppat och utat yanda flansar 143c. Dessa uppbara en reflektorskarm 160 yilken bestar av en mittdel, som dr plan, och ett par mat lutande sidoflansar 160a, se fig. 5. Reflektorskarmen ar ay betydligt storre maskvidd an brannareskarmen, t. ex. maskvidden 6, och Or lampligen utford ay trad ay ungefar 1 mm diameter. Reflektorskarmen 160 Or fast vid ramdelen 143c, fig. 5, genom att flansarna 160a omgripa ramdelen 143c, yid yilken de bandits genom att slingor av metalltrad dragits genom Mien 143d i ramdelen 143c och genom skarmen 160, yarefter de tvinnats om varandra vid 162a, sa att skarmen 160 Mlles pa sin plats ovanfOr brannareskarmen 150-152, och pa ratt avstand fran denna. As already mentioned, the upper part 143b on the frame 143 is provided with upwardly and outwardly facing flanges 143c. These support a reflector arm 160 which consists of a central part, which is planar, and a pair of food inclined side flanges 160a, see Fig. 5. The reflector arm has a much larger mesh size than the burner arm, e.g. mesh size 6, and Or suitably challenge ay trad ay approximately 1 mm diameter. The reflector frame 160 is fixed to the frame portion 143c, Fig. 5, by the flanges 160a engaging the frame portion 143c, which are banded by pulling metal wire loops through the Mien 143d in the frame portion 143c and through the frame 160, after which they are twisted at 162a, so that the screen 160 Mlles in its place above the burner screen 150-152, and at a right distance from it.

Da denna anordning befinner sig I funktion, tillfores gas eller angor av ett flytande bransle till anslutningsbussningen 127 under tryck, yarifran de fordelas genom munstycket 127a i en fin strom genom den fria ytan, som omgives ay vindskyddet 128. Vindskyddet 128 forhindrar, att stralen ay bransle avviker at sidan, samtidigt som den forhindrar, att storre partiklar av damm medfolja den insugna luften in i yenturirorets 121 strypstalle. Luften suges in ph grund av branslestrommens tryck, och venturiroret 121 Or tillrackligt kraftigt dimensionerat for att medgiva maximal bransleeffekt. Verkan ay yenturkoret 121 blir ocksh en minskning av hastigheten utan att for den skull baktryck uppkommer. When this device is in operation, gas or steam of a liquid fuel is supplied to the connection bushing 127 under pressure, from which they are distributed through the nozzle 127a in a fine stream through the free surface, which is surrounded by the windshield 128. The windshield 128 prevents the jet ay The branch deviates from the fact that the side, at the same time as it prevents larger particles of dust from accompanying the sucked-in air into the throttle stall 121 of the yen tube. The air is sucked in ph due to the pressure of the fuel stream, and the venturi 121 Or sufficiently dimensioned to allow maximum fuel power. The action of the yenturkor 121 also results in a reduction in speed without back pressure.

Fran venturiroret 121 ror sig bransleblandningen mot skarmen 132, dar den bringas att vanda riktning ph hada sidorna pa grund ay inverkan frail denna skarm 132 i Brening med de hada omriktningsvaggarna 110c och 110d. Detta leder till en ytterligare minskning av hastigheteri och trycket genom hela samlingsrummet, sa att trycket i stort sett blir utjamnat. Samtidigt sker en homogenisering ay blandningen. From the venturi tube 121, the fuel mixture moves towards the screen 132, where it is caused to change direction on both sides due to the influence of this screen 132 in Brening with the two directional walls 110c and 110d. This leads to a further reduction in velocity and pressure throughout the assembly space, so that the pressure is largely equalized. At the same time a homogenization takes place in the mixture.

Blandgasen passerar darefter uppat genom den inre brannareskarmen 152, spridareskar- men 151 oak den yttre brannareskarmen 150. The mixed gas then passes upwards through the inner burner screen 152, the diffuser screen 151 and the outer burner screen 150.

Dar antandes den pa utsidan ay sistnamnda skarm. Om anordningen i sin helhet Or ratt installd, skall den brinnande gasen alstra en bla mantel ay ytterligt sma lagor, som Or jamnt fordelad Over hela ytan av brannareskarmen. Laghojden kommer under normala omstandigheter att vara mellan 1,5 och 3 mm. Kontinuiteten hos lagmanteln forbattras ge- — —it nom den omstandigheten, att den fina maskvidden hos brannareskarmen leder till ett mycket stort antal oppningar tatt intill varandra. There it was ignited on the outside of the latter screen. If the device as a whole is steered, the burning gas must produce a blue jacket in extremely small layers, which is evenly distributed over the entire surface of the burner screen. The team height will normally be between 1.5 and 3 mm. The continuity of the layer jacket is improved by the fact that the fine mesh width of the burner screen leads to a very large number of openings taken next to each other.

Tendensen hos brannareskarmen att uppvarmas utnyttjas pa sã salt att anordningen darvid utgor en hogstralande radiator. The tendency of the burner screen to be heated is utilized in such a salt that the device thereby constitutes a high-radiating radiator.

Reflektorskarmen 160 är anbragt pâ ungefar 6 a 12 mm aystand frail brannareskarmen 150 och salunda ovanfor lagspetsarna, varigenom fullstandig forbranning sakerstalles. Den tjanar ocksa som ett spjall for forhindrande av att de varma avgaserna alltf Or snabbt skola spolas bort, och som reflektor for omkastning av de infraroda stralarna tillbaka mot brannareskhrmen 150, sá att ratt temperatur och farg ph denna uppkommer. The reflector arm 160 is mounted at approximately 6 to 12 mm apart from the burner arm 150 and thus above the team tips, thereby ensuring complete combustion. It also serves as a damper to prevent the hot exhaust gases from being flushed out too quickly, and as a reflector for reversing the infrared rays back towards the burner screen 150, so that the right temperature and color are generated.

Under de angivna fOrhallandena kan bransletillfOrseln strypas ned for reglering i samm a grad som den ovan beskrivna anordningen utan fara for bakslag till samlingsrummet. Under the specified conditions, the fuel supply can be restricted for regulation to the same extent as the device described above without risk of backlash to the assembly space.

Da brannareskarmens aggregat 150-152 är utslitet eller fOrbrukat, kan det snabbt ersattas med ett nytt aggregat, medan det gamin behalles for ersittande av sjalva brannareskarmen 150, om ovriga delar befinna sig i gott tillstand. Pa grund av den goda passningen mellan brannareskarmsaggregatet 150 —152 kommer sadan expansion eller kontraklion att medgivas, som dr erforderlig for upptagande av varmerorelserna, under glidningsrorelse i den av ramarna 143 bildade kanalen. Harigenom forhindras buckling av skarmen 150-152, och dess livslangd forlanges. Under hela arbetet kommer brannareskarmens aggregat 150-152 att forbli plant och ph jamnt avstAnd frail reflektorskarmen 160, varigenom man sakerstaller, att en likformig temperatur uppratthalles over hela ytan, nagot som Sr viktigt for god verkningsgrad. As the burner arm assembly 150-152 is worn or consumed, it can be quickly replaced with a new assembly, while the gamin is retained to replace the actual burner arm 150, if other parts are in good condition. Due to the good fit between the burner arm assembly 150-152, such expansion or contraction as will be required to absorb the heat motions will be allowed during sliding motion in the channel formed by the frames 143. This prevents buckling of the screen 150-152, and its service life is required. During the entire work, the burner arm assembly 150-152 will remain flat and evenly spaced from the reflector arm 160, thereby ensuring that a uniform temperature is maintained over the entire surface, which is important for good efficiency.

Uppfinningen Sr givetvis icke inskrankt till de bada ovan i detalj och ph ritningarna visa-de utforingsformerna (Way, utan olika modifikationer kunna forekomma mom uppfinningens ram. Sadana modifikationer dro uppenbara for en var fackman pa grund av bans normala fackmannamassiga kunnande. The invention is of course not limited to the two above in detail and the drawings show the embodiments (Way, but various modifications may occur within the scope of the invention. Such modifications were obvious to one skilled in the art due to the ordinary skill of the art).

Claims

Patent claim:

The present invention relates to a generator for infrared rays, which consists of a housing (10-13), which contains a burner opening (44), a further medal for supplying fuel to the interior of the housing (10-13) and finally for splitting. mom holjet. According to the invention, a flat burner arm (50) with fine meshes in association with a support grid (51) with coarse meshes is arranged to extend over the burner opening and placed on the housing in such a way that it can expand and contract without losing its plane. form.

In a generator according to claim 1 Sr Wet (10-13) provided with a channel (45), which Sr water towards the burner opening and arranged to receive the edge portion of the burner frame (50) and the support grid (51), and these are of slightly smaller dimension. in terms of width and length of the space delimited by the channel (45). The burner screen (50) is otherwise arranged to fit into the width of the channel, so that expansion and contraction are possible while maintaining the flat shape of the screen.

In a generator according to claim 1 or 2, a flat reflector arm (60) is arranged in the housing (10-13) outside the burner arm (50) and parallel thereto.

In a generator according to any one of the preceding patent claims, a mixing chamber is provided using a ventufir & (21) to effect the mixing. The mixing chamber Sr is connected to an inlet (27) for fuel and Sr is arranged to transfer this fuel to the burner screen (50). The venturi (21) is surrounded by a substantially content free air supply around the fuel inlet (27) for the influence of the venturi effect from the industry. 5. In a generator according to any one of the preceding patent claims, a fine-mesh reversing arm (40) of substantially the same mesh size as the burner arm (50) is arranged on

5. the inside of the burner arm (50), in order to provide security against setbacks of the law, and both the burner arm (50) and the reversing arm (40) have sh. small open proportion of the total area, that substantial back pressure does not occur on the inside of the burner screen (50).

In a generator according to any one of the preceding patent claims Sr Wet (10-13) provided with a frame (43), the parts of which are fixedly connected to each other, and which carried the burner arm (50) and the reflector arm (60), which together pulled removable as a unit from the frame of the generator. Request publications: Patents from Switzerland 331 682; United Kingdom 494 08

7.