US3361367A - Gas burner - Google Patents

Gas burner Download PDF

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Publication number
US3361367A
US3361367A US499326A US49932665A US3361367A US 3361367 A US3361367 A US 3361367A US 499326 A US499326 A US 499326A US 49932665 A US49932665 A US 49932665A US 3361367 A US3361367 A US 3361367A
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US
United States
Prior art keywords
burner
gas
flames
insert
slots
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
US499326A
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English (en)
Inventor
Hein Georg
Tropp Erich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vaillant GmbH
Original Assignee
Joh Vaillant GmbH and Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Joh Vaillant GmbH and Co filed Critical Joh Vaillant GmbH and Co
Application granted granted Critical
Publication of US3361367A publication Critical patent/US3361367A/en
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
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/10—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head

Definitions

  • a gas burner which includes a housing having an open top and forming a mixing chamber into which a combustible gas-air mixture is introduced under pressure.
  • a burner insert is mounted across the open top of the housing.
  • the insert has a plurality of openings through which the mixture flows for combustion above the insert.
  • the insert is formed of sheet metal and has at least one side bent underneath to form a hollow tube along and under that side.
  • the tube communicates with a part of at least one of said openings in the insert.
  • the tube also defines a limited access entrance extending between the interior of the tube and the mixing chamber to permit the gas-air mixture to enter the tube while maintaining the pressure of the mixture in the tube less than the pressure in the chamber.
  • the tube is otherwise closed whereby the gas-air mixture at said part of the burner opening will be at a pressure below that at the other burner openings to produce a more stable flame at that point.
  • the present invention relates to a gas burner comprising a mixing chamber from which the gas-air mixture discharges through a plurality of gas outlet openings.
  • the adhering flames are supplied in known manner by a gas-air mixture at an artificially reduced flowout rate.
  • Various possibilities of how to retard the portion of the outflowing gas mixture intended for supplying the adhering flames are known.
  • One way is to provide pressure release chambers communicating with the mixing chamber with gas outlet openings at which adhering flames are produced. In such case the adhering flames are not supplied directly from the mixing chamber, but indirectly from the pressure release chambers from which a portion of the gas mixture is discharged at substantially reduced rate of flow.
  • the object of the present invention in a gas burner made of sheet metal parts to provide such pressure release chambers intended for supplying adhering flames in a simple manner at low manufacturing expense, without additional parts having to be attached and connected with the burner parts.
  • the invention resides in the fact 3,361,357 Patented Jan. 2, 1968 that the pressure release chambers are bounded by U- shaped, downwardly rounded off edge portions, bent of a burner insert formed with the gas outlet openings and closing off the mixing chamber.
  • the invention may be expediently realized by having the lengthwise edge portions of a strip type burner insert provided with transverse gaS outlet slots bent downwardly so as to be U-shaped, such that lengthwise extending pressure release chambers are produced beneath the ends of the gas outlet slots. With such a design of the burner insert no additional gas outlet openings need be provided for the adhering flames. Instead the adhering flames burn at the ends of the gas outlet slots provided for the burner flames in close vicinity to the burner flame.
  • This is of particular significance for gas burners with a substantially horizontally arranged V-shaped mixing chamber. It has been shown that with such configuration of the mixing chamber the flames burning at the end areas of the burner insert show particular tendency to lift. Obviously, this is due to pressure baiflng effects and nonuniform pressure distribution in such a mixing chamber. Thus, it is advantageous to provide adhering flames at the very end areas of the burner insert in the manner as described.
  • the gas supply to the mixing chamber and the primary air intake are adapted such that the combustible mixture discharges from the gas outlet slots being next adjacent to the gas nozzle in direction of the flow at a suflicient rate of flow, the flowout rate of the mixture will be reduced at the further gas outlet slotswith the exception of a few gas outlet slots located at the very end of the burner, a fact to be neglected at present. This is due to the flow conditions in the horizontal mixing chamber. Surprisingly enough, it has shown that the flames become longer and more unstable at the gas outlet slots at which the mixture discharges at a reduced rate of flow, and also exhibit a slight inclination in the central area of the burner, while at the next adjacent gas outlet slots there will be produced relatively short taut flames.
  • the flame picture of such gas burner is nonuniform and combustion is incomplete. This may therefore result in undesired formation of CO and in local overheating of a fin block arranged above the burner, of a continuous-flow heater. It is the object of the present invention to improve on the nonuniform flame picture as described of such a gas burner.
  • this object is attained, by the provision of spacings of the gas outlet slots in the burner mouthpiece that are extended with increasing distance from the gas inlet nozzle effecting the primary air intake.
  • it is of importance to facilitate the secondary air intake, in which is insuflicient due to the reduced flowout rate of the mixture, which intake defines the nature of the flame.
  • the secondary air supply is improved by increased distances between the gas outlet slots, the longer unstable flames become shorter and tauter.
  • suitable dimensioning of the slot distances With suitable dimensioning of the slot distances, a uniform flame picture can be obtained over the whole burner length. This result cannot be obtained by providing gas outlet openings of increasing size in well-known manner, apart from the fact that an enlargement of the gas outlet openings is prohibitory on account of the required safety against flashback.
  • FIG. 1 is a diagrammatic illustration of a gas burner in elevational view.
  • FIG. 2 is a plan view thereof.
  • FIGS.'3 and 4 are sections of one end of the burner insert on an enlarged scale.
  • FIG. 5 is a cross-section through a burner insert of different embodied form, on an enlarged scale.
  • FIG. 6 is the respective plan view thereof.
  • FIG. 7 illustrates diagrammatically a modification of the burner of FIG. 1 with diiferent distancees of the gas outlet slots.
  • a manifold 1 formed with gas outlet nozzles has attached thereto in juxtaposed relationship several individual gas burners 3, only one of which being shown.
  • Gas burner 3 comprises a housing formed by two burner cups 4, 4' made from pressed sheet metal, which housing defines a Vshaped mixing chamber 5, and has a strip type burner insert 6 closing off the top of the mixing chamber 5.
  • the burner insert 6 is formed with numerous parallel gas outlet slots 7.
  • the ends 8, 8' of burner insert 6 are bent so as to be U-shaped and rounded off downwardly so that there will be two tubes, each of which forms a pressure reduction chamber 9, 9', below the last gas outlet slots 7' respectively.
  • the reduction chamber 9, 9 communicate with the mixing chamber 5 either by punched out holes 10 (as in FIG. 3) or by a gap (as in FIG. 4) between the sheet metal edge and the bottom of the burner insert.
  • the 'gas mixture also enters the reduction chambers 9,9 wherein a pressure drop is caused by turbulence. Therefore, the gas mixture will discharge from the end outlet slots 7' at'an artificially reduced rate of flow. The reduced flow causes adhering flames at these locations which provide for continuous ignition for the gas flames which tend to lift from the adjacent inner gas release slots 7.
  • FIGS. 5 and 6- the full length thereof. These chambers are arranged beneath the ends of the transversely extending gas outlet slots 17.
  • This structure results in a main flame 20 at each outlet slot 17 and both sides thereof smaller adhering flames 21, 21' supplied from the release chambers 19, 19.
  • the burner insert 6, 16 is made from corrosion-resistant sheet metal such as stainless sheet steel. It is supported by impressed beads 14 of the two burner cups 4, 4. The two cups are joined together as by a rabbet 13.
  • the burner slots are spaced differently.
  • the spacings increase from the right-hand side leftwardly.
  • the spacings of the gas outlet slots 7 are decisive for the secondary air intake are thus the greater, the less is the flowout rate of the gas mixture, thereby ensuring that all individual flames have suificient secondary air supply and the flame picture has the configuration as shown in FIG. 4. This will result in a uniform flame picture as illustrated at 22.
  • a gas burner apparatus including a housing having an open top and forming a. mixing chamber into which a combustible gas-air mixture is introduced under pressure, with a burner insert across said open top and having a plurality of openings through which the mixture flows for combustion above the insert, the improvement 3 comprising: said insert being formed of sheet metal having at least one side thereof bent underneath to form a hollow tube along and under said side, said tube communicating with a part of at least one of said openings, said tube defining a limited access entrance extending between the interior of the tube and the chamber to permit said mixture to enter said tube while maintaining the pressure of the mixture in the tube less than the pressure in the chamber, said tube being otherwise closed whereby the gas-air mixture at saidpart of said open- 7 most nearly adjacent the point of introduction of said gas-air mixture being the closest together and those most remote from said point being spaced the farthest apart.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
US499326A 1964-12-18 1965-10-21 Gas burner Expired - Lifetime US3361367A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEV27390A DE1256596B (de) 1964-12-18 1964-12-18 Gasbrenner mit einer Mischkammer
DEV0027481 1964-12-31

Publications (1)

Publication Number Publication Date
US3361367A true US3361367A (en) 1968-01-02

Family

ID=26001805

Family Applications (1)

Application Number Title Priority Date Filing Date
US499326A Expired - Lifetime US3361367A (en) 1964-12-18 1965-10-21 Gas burner

Country Status (7)

Country Link
US (1) US3361367A (de)
AT (1) AT255075B (de)
CH (1) CH447083A (de)
DE (1) DE1256596B (de)
FR (1) FR1454903A (de)
GB (1) GB1117749A (de)
NL (1) NL6514650A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3567137A (en) * 1969-08-29 1971-03-02 Carrier Corp Gas burner
US3924812A (en) * 1973-10-04 1975-12-09 Sumitomo Metal Ind Apparatus for supporting and guiding slab in the secondary cooling zone of continuous casting machine
US3960328A (en) * 1974-11-18 1976-06-01 Jean Archambault Dishwashing machine and rotary sprayer therefor
JPS52118639A (en) * 1976-03-30 1977-10-05 Matsushita Electric Ind Co Ltd Gas burner
US5649821A (en) * 1994-07-08 1997-07-22 Fogliani; Giuseppe Gas burner with an improved diffuser

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2212910A5 (de) * 1972-12-28 1974-07-26 Saunier Duval
JPS5442270Y2 (de) * 1976-11-11 1979-12-08
EP0172945A1 (de) * 1984-08-24 1986-03-05 Furigas B.V. Gasbrenner
US5839891A (en) * 1997-01-13 1998-11-24 Beckett Gas, Inc. Power gas burner

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1451072A (en) * 1921-07-01 1923-04-10 Odin Stove Mfg Company Burner
DE1189225B (de) * 1960-12-06 1965-03-18 Junkers & Co Reihenbrenner

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1451072A (en) * 1921-07-01 1923-04-10 Odin Stove Mfg Company Burner
DE1189225B (de) * 1960-12-06 1965-03-18 Junkers & Co Reihenbrenner

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3567137A (en) * 1969-08-29 1971-03-02 Carrier Corp Gas burner
US3924812A (en) * 1973-10-04 1975-12-09 Sumitomo Metal Ind Apparatus for supporting and guiding slab in the secondary cooling zone of continuous casting machine
US3960328A (en) * 1974-11-18 1976-06-01 Jean Archambault Dishwashing machine and rotary sprayer therefor
JPS52118639A (en) * 1976-03-30 1977-10-05 Matsushita Electric Ind Co Ltd Gas burner
JPS5836250B2 (ja) * 1976-03-30 1983-08-08 松下電器産業株式会社 ガスバ−ナ
US5649821A (en) * 1994-07-08 1997-07-22 Fogliani; Giuseppe Gas burner with an improved diffuser

Also Published As

Publication number Publication date
FR1454903A (fr) 1966-10-07
DE1256596B (de) 1967-12-21
AT255075B (de) 1967-06-26
NL6514650A (de) 1966-06-20
CH447083A (de) 1967-11-30
GB1117749A (en) 1968-06-26

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