US2615510A - Gas burner head - Google Patents

Description

OCt. 28, R E JAMES TAL GAS BURNER HEAD Filed May 24, 194'? INVENToRs; Riemen E. L1A/wss, BY Awe-er J LAMPE/er.

TToR/VEYS.

van introduction of secondary aeration.

Patented Oct. 28, 1952 fiume STATES PATENT Richard E. James, Pasadena, and Albert J. Lampert, Walnut, Calif.,y assignors to Rheem Manufacturing'Compan'y, Richmond, Calif., a corporation of California Application Mayet, 1947, serial Np.750,337

,Our invention relates-to a gas burner and has yparticular lreference and adaptability to lgas burners,` to be 'used in connection with hot Water heaters, space heatersand other gas redheating `appliances wherein it is advantageous to be able 'to' produce relatively large quantities of heat in 'a relatively small'area. l

` Ithas long been'the hope and objective of the fgas burner industry to produce a relatively simple gas burner which is economical to produce; which. lwill produce large quantities of heat in a relatively small space; and which will result in an eilicient use of the gas fuel. It is an objectv of v'our invention to produce an ecient gas burner tion. The necessary oxygen or air is obtained from tWo sourcesprimary and secondary air. Primary air is that airwhich is introduced into the burner and mixed with the gas vstreamvaft some point prior to the burner ports. Secondary l. air is that air which is mixed with the combustible fuels as they escape from the ports-and at the 'point of combustion.

Considerable variation is permitted in the ratio of primary and secondary air to obtain successful burning characteristics. In other words, a successful burner can operate with, for example, 40 Y' primary air and 60% secondary air, or conversely can operate efficiently with'a mixture of, for ex'- 2 claims. (ol. 15s-9116) o y i ticular reference togFigure 1, our invention comample, 60% primary air and 40% secondary air.

l One of the objects and advantages'of our burner :design lies in the fact that it'results in a streamlined flow in the gas passages as opposed to a turbulent iow which permits the inducement or introduction of a relatively high percentage of primary air. By introducing a larger percentage of primary air, the burner can operate efliciently A.with a lower proportion of secondary air v;` thereranged and designed that the flames will not lift from the ports. Lifting is caused kby too rapida flow of gas-air mixture from the port or too rapid It is a further object of'our invention to provide a gas burner having an exterior and interior. prole designed to prevent ame lifting,

line 24.

Other conditions which are importantin the satisfactory and efficient operation of a gasfburner are the absence of fiash back and' stability/of flame. Both ame stability and flash backfeanbe effected and partiallyv controlled byfthe`l'inte1fior profile of the burnenthe diameternand depth of the ports and placement of' ,theports, It is a further object of our invention to provideagas burner havingan interior profile which resultsv in the streamline' now and gives flame stability, and which is formed with portshaving suiicientdepth with respect to the wrelatively large cross-sect Anal area of the ports to prevent iiash back. L j v A further object of our invention is to vproduce a gas burner having a relatively largeport 4 lo/adving with respect to standard burnersnfyz Thisob- Otherand further objectsfandjadvantagesof our invention vjvvlllbecome apparent from the drawings and specifications relative'f,thereto. f Inthe drawingsjv lv'igure'l represents an elevational:.viewpfja burner embodying the principles of our invention. Figure 2 is a plan viewof the burneiilshown'in 1. V: l Hz, ./rl .A y Figure Bis a sectional viewtake'n online 3,-,3 of Figure j Referring to the drawing'sand with more parprses in its more essentialieatures, a gasandan inlet and mixing chamber I0, -and a bu'rnerh ad disposedy atv the discharge end of y the' 4r'ri Xing z'chamber lo and Comprising an upper anda lower section lZjoined togetherlon as substantially common planev andy defining upper and lower ports I 3 and I4 alternately V disposed ,on opposite sides of the common plane.

- The air and gas inlet and mixing, l0 comprises a tubular memberZO', which den'es a gas, passage 2|, `and which isformed A,withvone or more apertures `22 adapted to admitp'ri'rnary air intoV the burner. One endof thev tubular member 2a is threaded as' aus andgig'secured to-a source oflfgas supply, suon as pipe.2`ll, .by means ofr a threaded aperture 25 in thegassupply It .will vbe understood, oi' course, that any suitable means for securing ,the .tu ar memberl 2l? intorthe gas supplyline 24,@s'u`ch as welding, brazing or the like, should befcons'idered equivalent" of -the threaded' endw23, The v,other end of thettubularnlember 2t is Af ormedjwithcan undercut section 26.l j l u :The end of thetubmarvmemberzc adiacenti-(he threaded end 23 is formed with a'thicker Wall section which defines an orice 30. The orice 30 is axially disposed with respect to the tubular member and is positioned with respect to the apertures 22 so that the injection of raw gas through the orifice from the gas supply line 24 causes-amixtureof `the raw.. gas vand the primary air-entering through the aperture 22.

An annular rotatable band 3| having a plurality of apertures 32 adapted to register with the apertures 22 is disposed about the circumference of the tubular member 2U and is adapted upon rotation with respect to the tubular member 20 to act as a regulating valve. to .limit the quantity of primary air which is toy beediiused -intothe raw gas stream injected from the orice 30.

gas mixture. is carried upWardIyintma-.gas passage 45 Where it spreadslout 4through the ports I3 and I4. Because of the symmetry of the mixing chamber 2I and the passage 45 and the absence of any abrupt changes in direction of `the gas dow, a streamline ilow results in place -lof, turbulence.

By-obtaining a streamline ow `in place-of turbulence, numerous advantages are @gained- The lower section I2 of the burner -head is Y formed preferably of a metal stamping and comprises a substantially frustro-comcal shaped section having a depending annular iiange 36 .atthe small end of the frustro-conical section .35. L'Iheannular flange 36 is 4adapted to t onto .theundercut.section. 230i the tubular member 20. ,Theannular ange 33may besecured to Ltheundercut section 26 by brazing, welding, by a. pressed nt orbyfany other suitable. means.

Whereas,we have herein shown the tubular ,member 20.andthe.lower section I2 of the burner head, to'lbe of two separateparts, itwill b e understoodl that the essential featuresv of ,our `invention v pertain to the conguration Vof ,the .burnerj head` rather than themethod ofrmanu- 'facturing Other methods -could be employed `Withinthespirit of our invention. vFor example, `he1.lower section' I2 of the burner head and thetubular member' 20could. bef formed as van integral part'. by. means of de-casting, i swaging j orianycother suitable .means forproducing the general configuration.

. Theupper or larger end of the frustro-conical section 35 merges intoan. annular iiange 31. The annulanarige' 31 is deformed intola plurality of alternatedepressions and raised sections 38 and 39. The top of the raised` sections 39 aresubstantially flatandall terminate .in substantially the same plane, which planeV is normal tothe kaxis ofthefrustro-conical section' 35.

Theupper section II of the burner head comprisesan` inverted substantially conical shaped section 4 0, ,which merges into an annular head "4,I,'and.thence into `a horizontally disposed` annularlange. The annularjange 42 is delformed into a: pluralityv of alternatelvdisposed, fdjepressedand raised sections 43 and44. 'The ".depressed sections 43 are substantially flat and terminate insubstantially the same plane Which .isnormal tothe axis of the conical section 40.

'Thezupperisection ,II of the burner head and the lower section I2are secured together by any suitable means, such as welding or brazing, in sucha'position that 'the depressed sections 38 Yan'd"43 and the raised sections 39 and 44 are joppositely disposed, vthereby dening a plurality 'off-ports I3 and I4 alternately disposed on op- ;posite sides of the common plane.

' L'Forreasons which will become apparent later thejports I3, whichv are dened by the raised `sections 39 and. 44, ,are purposely made ,larger thanthe ports dened bythe depressed s ec- ;tio'nsj38 and 43.

1.It will beseen that ,Y we vhave invented, a new and improved. gasrburnerof a relatively simple andlinexpensive `construction which gives a satisfactoryflame characteristic and whichA procducea relatively Alarge.quantity 4of heat with a :relatively .smallfb-urner. Lhe burner.. luereinde-A gLarger-volumes -of combustible gases can be handled in` a given size burner Without having to resortto velocities of gas travel Which would lift the flame from the ports I3 and I4. It will also be noted that by forming the ports I3 and I4 .by deforming the flanges31 and 42 rthat sufficient va relatively larger` quantity of primary airmay be introduced into thesgas stream which reduces the problem of obtaining secondary-aeration. As rwas Vnoted before, the ports I4 arelpur- .posely made smaller vthan the ports. I3` so that lthe lower; row ofV ports. will not starve therupper ports ofv secondaryaeration.

The burner described abovezproducesa .substantially horizontal name, whichlis'eminently satisfactoryfor water heaters, ,and the.V like.

While We have herein shown. anddescribed Qur invention in what We have conceived to beptlie most practical and preferred embodiment, it iis recognized that departures maybe made therefrom within the scope of our invention, which ,is

not to be limited to the detailsdisclosed herein, but is to be accorded the full scope of the claims soas to embrace any and all equivalent devices. j Having described our invention, what we claim as new and desire to secure byLetters -Patent is: Vl. In a gas burner having a gas' inlet, an air `inlet, and a, mixing chamber, the "featuresof novelty comprising: a dared member extending from said mixingA chamber and' formed .with a peripheral flange, said flangebeing formed with a plurality of alternately disposed raised and'depressed sections and connecting vWalls forming a plurality of radial passageways, acapl havingla concave-convex section depending coaxiallyinto said ared member and formed witha peripheral flange complementary to said first mentioned ange and being formed with aplurality o fcalternately raised and depressed sectionsk andl connecting VWalls forming a plurality of radial'pa'ssageways, said cap being secured to said dared member in overlying spaced relation theretd'the alternately raised and ,depressed seetionsofsaid peripheral flanges cooperating to define spaced radial gas ports, the raisedl sections Vand Aconnecting walls of the cap, and the raisedsections of the flared member dening upper gas-ports,

and the depressed sectionsy and connecting `walls of the flared member and depressed Asectionsof the cap dening lowergas ports staggered with respect to the upper ports, said upper ports being relatively larger than said lowerports.

2. In agas burnerghavinga'gas `Ainlet,'an air inlet, and a mixing chamber, the features of novelty comprising: a ared member having a uniformly thick side Wall extending from said mixing chamber and formed with a peripheral flange, said iiange being formed with a plurality of alternately disposed raised and depressed sections and connecting walls forming radial passageways, a, cap having a uniformly thick side wall and a concavo-convex section depending coaxially into said iiared member and formed with a peripheral flange complementary to said first mentioned ilange and being formed with a plurality of alternately raised and depressed sections and connecting walls forming a pluralityof radial passageways, said cap being secured to said ared member in overlying spaced relation thereto, the alternately raised and depressed sections of said peripheral flanges cooperating to dene spaced radial gas ports, the raised sections and connecting walls of the cap and the raised sections of the flared member defining upper gas ports, and the depressed sections and connecting walls of the iiared member and depressed sections of the cap defining lower gas ports staggered with respect to the upper ports, said upper ports being relatively larger than said lower ports.

RICHARD E. JAMES. ALBERT J. LAMPERT.

REFERENCES CITED 'Ihe following references are of record in the le of this patent:

UNITED STATES PATENTS

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