US3635209A - Gas burner - Google Patents

Gas burner Download PDF

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Publication number
US3635209A
US3635209A US883381A US3635209DA US3635209A US 3635209 A US3635209 A US 3635209A US 883381 A US883381 A US 883381A US 3635209D A US3635209D A US 3635209DA US 3635209 A US3635209 A US 3635209A
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US
United States
Prior art keywords
head
slots
gas burner
radial slots
burner
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
US883381A
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English (en)
Inventor
Roger Vignes
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.)
Engie SA
Original Assignee
Gaz de France SA
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 Gaz de France SA filed Critical Gaz de France SA
Application granted granted Critical
Publication of US3635209A publication Critical patent/US3635209A/en
Anticipated expiration legal-status Critical
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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
    • F23D14/06—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 radial outlets at the burner head
    • F23D14/065—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 radial outlets at the burner head with injector axis inclined to the burner head axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/08—Arrangement or mounting of burners
    • F24C3/085—Arrangement or mounting of burners on ranges

Definitions

  • the present invention generally relates to a gas burner, particularly for a gas cooker, comprising a plurality of combustion slots of variable depth.
  • the present invention relates to a gas burner, particularly for gas cookers, of the type having a high ratio of primary aeration, said burner being constituted by a mixer with atmospheric induction, an enclosure forming an annular chamber for distributing the mixture of combustion gas and primary air, connected to the front end of the mixer, mounted at a short distance from a supporting plate and fixed thereto, and defining with its central wall a cylindrical space, by a burner head in the form of a crown resting on the distribution chamber and provided with radial slots which are completely upwardly open, having a shallower depth on their outer rim than on their inner rim, presenting in the central part a depth shallower than those prevailing on the outer and inner rims, and connecting said distribution chamber to the atmosphere, and by a hot plate arranged above the burner and serving as a support for the vessels whose contents are to be heated.
  • the burners of this type having a high ratio of primary aeration may in principle use all gaseous fuels, the primary ratio of aeration being in the order of 0.8 to 0.95
  • the secondary aeration which is less important in this case, is then suitably cared for since the atmospheric air may freely reach the outer part of the burner head.
  • all this results in a poor flame stability, particularly with thermal outputs which are low with respect to the nominal output, and when the flames are exposed to draughts. This is why it has been found necessary to provide near the burner head devices for lighting and for monitoring the flames.
  • some burners are capped by a thermal distribution plate serving at the same time to support the containers to be heated, the unprotected lighting and flame monitoring devices are exposed to frequent shocks, clogging, etc., so that the burners, after some operating time begin to rnisfunction.
  • the present invention proposes to eliminate the above-mentioned drawbacks and has for its object a gas burner of the type mentioned hereinabove having a high ratio of primary aeration able to function with all commercialized gases, with a good thermal yield, in complete safety with very low-thermal outputs as well as with high-thermal outputs, the ratio between the minimum output and the nominal output being in the orderofl to 15.
  • the burner is placed below a protective tray provided with an opening above the burner head, the diameter of said opening being larger than the outer diameter of said burner head and said opening being covered by a hot plate, whose outer rim abuts on the protective tray; the upper face of the burner head, onto which the radial slots open out, is downwardly inclined towards the center of said burner head; the radial slots are obturated at their outer vertical edge and at their lower part in the zone of their inner edge and are completely open at their inner edge and, near the central zone of the slots, the burner head presents an annular groove cut in said central zone from its upper face.
  • the burner according to the invention is completely protected both against clogging and shocks and against lateral or vertical draughts. Nevertheless, an excellent and rational secondary aeration of the flames of the burner is ensured by fresh air rising towards the burner head up the central space in the enclosure constituting the annular distribution chamber.
  • the flames are stable not only during operation with normal output, but also during operation with deeply reduced output, because in these cases, the flames preferably cling to the central part of the slots at the location of the annular groove which serves at the same time as pipe conducting the mixture of combustion gas and primary air emerging from a flame less slot towards an adjacent flaming slot where this mixture immediately ignites and lights back the slot which had no flame.
  • the radial slots are cut in the burner head in groups of at least two slots which are very close to one another.
  • FIG. 1 is an elevational view in axial section of the burner according to the invention and FIG. 2 is a partial view in detail, also :in axial section.
  • the gas burner ll of the type having a high ratio of primary aeration, comprises a mixer 2 with atmospheric induction constituted of an injection nozzle 2a for the combustion gas and of a Venturi tube 2b; and enclosure 3 forming an annular distribution chamber 4 for the mixture of combustion gas and primary air, connected to the front end of the Venturi tube 2b, this enclosure 3 being mounted on a support plate 5 at a short distance therefrom and defining with its central wall 3a a cylindrical space or chimney 6; a burner head 7 in the form of a crown resting by its flange 7a on the enclosure 3 of the distribution chamber 4 and provided with radial slots 8 which are completely open upwardly, having a depth shallower on the outer edge 8a than on the inner edge 8b, presenting in the central part or zone St a depth shallower than those existing at the outer edge 8a and inner edge 8b, and connecting said distribution chamber 4 to the atmosphere; and also a hot plate 9 arranged above the burner l and serving as support for a vessel
  • the gas burner 1 is charac terized, according to the invention, in that it is placed below a protective tray 10 provided with an opening 11 above the burner head 7, the diameter of which opening is greater than the outer diameter of said head 7 and which is covered by the hot plate 9 abutting on the protective tray 10 by means of a plurality of supporting legs 12 connected together by a connecting ring 13.
  • the upper face 7b of the burner head 7, onto which the radial slots 8 open out, is downwardly inclined towards the center of said head 7 and in the inner marginal zone is downwardly curved, preferably progressively, so as to come in line with the central vertical wall 3a of the enclosure 3.
  • the radial slots 8 are completely obturated at their outer vertical edge So, for example, by the upper annular part 3b of the enclosure 3, and also completely open at their inner edge 8h so as to open out into the central recess 7b of the burner head 7.
  • the burner head 7 has an annular groove 14 cut in said latter from its upper face 7b, so that in this zone 80, the depth of the slots 8 is shallower than those existing on the outer edge 8a and inner edge 8b,
  • the radial slots 8 are in addition obturated at their base in the zone of their inner edge 8b by the flange 7a which extends approximately below the central zone 80.
  • the slots 8 communicate with the distribution chamber 4 through a part of the lower face of the burner head 7, said part being comprised between the flange 7a and the upper annular part 3b of the enclosure 3.
  • the slots 8 have a width of about 1 mm.,-a depth of about 8 mm. in the zone of the outer edge 8a, a depth of about I 1 mm. in the zone of the inner edge 8b and a depth of about 3 mm. in the central zone 8c in the region of the region of the annular groove 14.
  • the hot plate 9 comprises on its lower face ribs 911 which are preferably spiral.
  • a thermostat 16 is arranged in the central cylindrical space 6 of the enclosure 3, passes through the central recess defined by the upper face 7b of the burner head 7 and is fixed at its base to the supporting plate 2, the sensitive member 16a of this thermostat 16 being mounted to slide and to move axially freely in the envelope 16b of the thermostat 16 by means of a spring 160 and being capable of traversing a central hole 9b of the plate 9 and of slightly projecting above the upper face of said plate 9 when the spring 160 is relaxed or when an annular shoulder 16d against which the upper end of the spring 160 is applied abuts against a suitable stop fixed to the internal face of the envelope 16b.
  • the enclosure 3 of the distribution chamber 4 has an outer diameter greater than that of the opening 11 of the protective tray 'and comprises a horizontal annular upper part 3c joining the vertical upper part 3b.
  • To this horizontal upper part 30 is fixed the front end of a flash tube 17 placed below the tray 10, the slot 8 or the group ofslots 15 located opposite this flash tube 17 communicating with this latter by their outer edge 80.
  • the mixture of combustion gas and primary air flowing out of this slot 8 or group of slots 15 may easily penetrate into the flash tube 17.
  • the vertical upper part 3b of the enclosure 3 comprises one or more vertical cuts 18 in alignment with said slot 8 or group of slots 15.
  • FIG. 2 shows on a larger scale part of the burner according to the invention, the elements identical to those shown in FIG. 1 bearing the same reference numerals.
  • the flame 19 leaving this slot 8 comprises a part 19a at a very short distance above the upper face 7b of the burner head 7, this part generally known as blue cone and a fairly high plume or wreath 19b widening considerably towards the outside without touching the opening 11 and licking a large part of the hot plate 9.
  • the plume 19b extends only very slightly above the central space 6.
  • This particular form of the plume 19b is due on the one hand to the shape of the slots 8 and on the other hand to the fact that the secondary air is mainly sucked in upwardly through the central space 6 and, at the level of the burner head, is deviated towards the outside.
  • This Figure also shows that in the region of and above the annular groove 14, the blue cone" 19a has a swell 19c due to a stronger supply of gas through the central zone of the slot 8. Moreover, during service with a reduced output of gas, it is only in the region of the groove 14 that the flames are lit. The shape of these flames is a continuous ring. The groove ensures in addition the mutual lighting of the gas leaving the different slots 8.
  • a burner which combines all the desired qualities; particularly a ood flame stability, a good flexibility of operation, a good t ermal efficiency, an absolute protection against clogging and shocks, etc.
  • a gas burner comprising support means, a mixer mounted on said support means and having atmospheric induction, an enclosure forming an annular distribution chamber connected to the front end of said mixer, said enclosure having an inner wall forming an inner cylindrical space in concentric relationship with respect to said annular distribution chamber, means mounting said enclosure in spaced relationship with respect to said support means so that secondary air can pass from the bottom upwardly into said cylindrical space, a crown-shaped burner head mounted on said enclosure, said head having an upper face downwardly inclined into said cylindrical space, said head having a plurality of radial slots connecting said annular distribution chamber to said cylindrical space, means for obturating the outer vertical edge and the horizontal inner edge of said radial slots, said head having an annular groove in its upper face disposed in an outer zone near a central zone of the head, a protective tray mounted above said burner head and having an opening larger in diameter than the diameter of said head, and a circular hot plate mounted on said protective tray.
  • a gas burner according to claim 1 further comprising a thermostat envelope mounted on said support means to pass upwardly through said cylindrical space, said burner head, and said protective tray, resilient means mounting a thermostat sensitive member in said envelope for movement therewithin. and said sensitive member extending above the hot plate.
  • a gas burner according to claim 1 wherein a flash tube is mounted under said protective tray and has one end thereof disposed adjacent the outer edge of said radial slots, said means for obturating the outer vertical edge of said radial slots having slots adjacent said one end of the flash tube, the other end of said flash tube extending outwardly to communicate with the atmosphere.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
US883381A 1968-12-11 1969-12-09 Gas burner Expired - Lifetime US3635209A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR177758 1968-12-11

Publications (1)

Publication Number Publication Date
US3635209A true US3635209A (en) 1972-01-18

Family

ID=8658186

Family Applications (1)

Application Number Title Priority Date Filing Date
US883381A Expired - Lifetime US3635209A (en) 1968-12-11 1969-12-09 Gas burner

Country Status (6)

Country Link
US (1) US3635209A (enrdf_load_stackoverflow)
BE (1) BE741149A (enrdf_load_stackoverflow)
DE (1) DE1961932A1 (enrdf_load_stackoverflow)
FR (1) FR1600950A (enrdf_load_stackoverflow)
GB (1) GB1251279A (enrdf_load_stackoverflow)
NL (1) NL163618C (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2076098A2 (es) * 1993-07-30 1995-10-16 Ind Belseher S L Dispositivo quemador de gas
US5490778A (en) * 1990-04-12 1996-02-13 Dru B.V. Burner
US6599122B2 (en) * 2001-08-21 2003-07-29 Sourdillon Gas cooking appliance with error-proofing regarding the positioning of the burner head
US20060154193A1 (en) * 2005-01-07 2006-07-13 Gas Technology Institute Advanced commercial range burner

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HU185051B (en) * 1981-07-07 1984-11-28 Magyar Szenhidrogenipari Combinad gas burner with heat transfer by convection and radiation particularly for cooking apparatus
DE4033503A1 (de) * 1990-10-20 1992-04-30 Ruhrgas Ag Atmosphaerischer gas-kochstellenbrenner fuer gasherde

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB370589A (en) * 1931-03-02 1932-04-14 H Vogt Gut Ag Improvements in or relating to gas cookers
US2965167A (en) * 1958-12-02 1960-12-20 Eclipse Fuel Eng Co Low velocity gas burner
GB986766A (en) * 1962-05-04 1965-03-24 Radiation Ltd Gas hotplate
US3276441A (en) * 1964-10-29 1966-10-04 Waste King Corp Burner assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB370589A (en) * 1931-03-02 1932-04-14 H Vogt Gut Ag Improvements in or relating to gas cookers
US2965167A (en) * 1958-12-02 1960-12-20 Eclipse Fuel Eng Co Low velocity gas burner
GB986766A (en) * 1962-05-04 1965-03-24 Radiation Ltd Gas hotplate
US3276441A (en) * 1964-10-29 1966-10-04 Waste King Corp Burner assembly

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5490778A (en) * 1990-04-12 1996-02-13 Dru B.V. Burner
ES2076098A2 (es) * 1993-07-30 1995-10-16 Ind Belseher S L Dispositivo quemador de gas
US6599122B2 (en) * 2001-08-21 2003-07-29 Sourdillon Gas cooking appliance with error-proofing regarding the positioning of the burner head
US20060154193A1 (en) * 2005-01-07 2006-07-13 Gas Technology Institute Advanced commercial range burner
US7077644B1 (en) * 2005-01-07 2006-07-18 Gas Technology Institute Advanced commercial range burner

Also Published As

Publication number Publication date
FR1600950A (enrdf_load_stackoverflow) 1970-08-03
BE741149A (enrdf_load_stackoverflow) 1970-04-30
GB1251279A (enrdf_load_stackoverflow) 1971-10-27
NL163618B (nl) 1980-04-15
NL6918437A (enrdf_load_stackoverflow) 1970-06-15
NL163618C (nl) 1980-09-15
DE1961932A1 (de) 1970-11-26

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