US20060147865A1 - Cooking range burner head assembly - Google Patents

Cooking range burner head assembly Download PDF

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Publication number
US20060147865A1
US20060147865A1 US11030652 US3065205A US2006147865A1 US 20060147865 A1 US20060147865 A1 US 20060147865A1 US 11030652 US11030652 US 11030652 US 3065205 A US3065205 A US 3065205A US 2006147865 A1 US2006147865 A1 US 2006147865A1
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Prior art keywords
burner
head
base
annular
gas
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.)
Abandoned
Application number
US11030652
Inventor
Charles Czajka
Randall Diggins
Phillp Pio Vincenty
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Premark FEG LLC
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Premark FEG LLC
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/06Premix 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
    • F23D14/065Premix 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/08Premix 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 axial outlets at the burner head
    • F23D14/085Premix 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 axial outlets at the burner head with injector axis inclined to the burner head axis
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24COTHER DOMESTIC STOVES OR RANGES; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00Stoves and ranges for gaseous fuels
    • F24C3/08Arrangement or mounting of burners
    • F24C3/085Arrangement or mounting of burners on ranges
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D2900/00Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/14Special features of gas burners
    • F23D2900/14062Special features of gas burners for cooking ranges having multiple flame rings

Abstract

A burner assembly includes a substantially annular two-piece burner head having a base and a top. Gas-emitting orifices in the burner are directed inwardly and upwardly, but not outwardly. A restrictor plate controls the flow of secondary air through the burner assembly.

Description

    FIELD OF THE INVENTION
  • [0001]
    The present invention relates to gas fired cooking ranges and, more particularly, to burner head assemblies used in such ranges.
  • BACKGROUND OF THE INVENTION
  • [0002]
    Gas fired cooking ranges have achieved wide acceptance in both residential and commercial kitchens. A known design for gas fired cook tops in ranges includes separate burner assemblies for each cooking location, with each burner assembly including a venturi and a burner head having gas-emitting orifices. It is known to arrange the orifices so that the flames are spread widely, and are directed across the bottom surface of a vessel placed on a grate above the burner. These burners have included orifices in outwardly facing surfaces of the burner head, so that flames are directed outwardly from the burner head. A disadvantage of this design is that the outermost orifices are exposed to fouling from boil-overs and spills in which food can flow along outer surfaces of a cooking vessel above the burner and drip from the vessel onto the burner head.
  • [0003]
    Factors such as flame intensity and efficiency, burner assembly cleanability and fuel consumption efficiency are important to both residential and commercial installations. However, these factors may be of greater importance for commercial kitchens where a great number of meals may be prepared on each cook top in a relatively short period of time. The time required for completing a food course, including initial preparation time for heating and actual cooking time, can be reduced by efficient burner performance. If the flame from a burner spreads outwardly beyond the vessel being heated, or wicks up the side of the vessel, heat transfer efficiency decreases. Since commercial kitchens can be hectic environments, boil-overs and spills are common. Therefore, cleanability is important, and it is advantageous to reduce the time required for disassembling and reassembling the cook top for thorough cleaning. Maintaining burner performance in spite of spills and boil-overs during food preparation is also important.
  • [0004]
    What is needed in the art are burner assemblies that are reliable, use fuel efficiently, heat vessels quickly and can be disassembled and reassembled efficiently for thorough cleaning of the cook top.
  • SUMMARY OF THE INVENTION
  • [0005]
    The present invention provides a two-piece burner assembly with an annular base and cover. Gas-emitting orifices are provided in the cover only in upwardly and/or inwardly facing surfaces. A restrictor plate positioned within the annular burner controls the flow of secondary air for efficient burner performance.
  • [0006]
    In one aspect thereof, the present invention provides a gaseous fuel burner assembly with a venturi and an annular burner head associated with the venturi for the combustion of gaseous fuel from the venturi. The burner head has outwardly facing, upwardly facing and inwardly facing surfaces. The burner head defines gas-emitting orifices only through the upwardly and/or inwardly facing surfaces of the burner head.
  • [0007]
    In another aspect thereof, the present invention provides a gas fuel burner head with a substantially annular base and a substantially annular cover having gas-emitting orifices on only upwardly and/or inwardly facing surfaces of the cover. A restrictor plate limits the flow of air through the center of the substantially annular base and top.
  • [0008]
    In a still another aspect thereof, the present invention provides a burner head with a substantially hollow annular body directing gas flow therethrough. The body has only upwardly and/or inwardly facing orifices for emitting gaseous fuel to be burned. The flow of air through the substantially annular body is controlled.
  • [0009]
    In a further aspect thereof, the present invention provides a burner head with a substantially annular burner head base having inner and outer base edges and defining an annular open top channel for directing gas flow therethrough. A substantially annular cover on the base has inner and outer cover edges engaging the inner and outer base edges, respectively. The inner cover edge has an inner lip with an angular surface facing downwardly and laterally for positioning the cover on the base, with the inner lip disposed along the inside of the substantially annular base.
  • [0010]
    In a still further aspect thereof, the present invention provides a burner assembly for an open top cooking range with a monolithic body forming first and second gas receiver ends, first and second venturis and first and second burner head bases. First and second burner head covers are engaged removably on the first and second burner head bases.
  • [0011]
    Other features and advantages of the invention will become apparent to those skilled in the art upon review of the following detailed description, claims and drawings in which like numerals are used to designate like features.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0012]
    FIG. 1 is a perspective view of a cooking range having burner head assemblies in accordance with the present invention;
  • [0013]
    FIG. 2 is a perspective view of a partly disassembled burner head assembly in accordance with the present invention;
  • [0014]
    FIG. 3 is a perspective view of a burner head cover of the burner head assembly shown in FIG. 2;
  • [0015]
    FIG. 4 is a cross-sectional view of a burner head in accordance with the present invention;
  • [0016]
    FIG. 5 is a top view of a restrictor plate in accordance with the present invention; and
  • [0017]
    FIG. 6 is cross-sectional view of a burner head in use.
  • [0018]
    Before the embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangements of the components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced or being carried out in various ways. Also, it is understood that the phraseology and terminology used herein are for the purpose of description and should not be regarded as limiting. The use herein of “including”, “comprising” and variations thereof is meant to encompass the items listed thereafter and equivalents thereof, as well as additional items and equivalents thereof.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • [0019]
    Referring now more specifically to the drawings and to FIG. 1 in particular, numeral 10 designates a cooking range having a burner head assembly 12 (FIG. 2) in accordance with the present invention provided as part of a cook top 14. Range 10 further includes an oven 16. The present invention is useful for commercial ranges and residential ranges, and the particular outward configuration of range 10 shown in FIG. 1 is merely exemplary.
  • [0020]
    Range 10 is a gas fired range, having a gas circuit (not shown) for supplying combustible gas to each burner assembly 12 provided at several cooking locations on cook top 14, and to an oven burner assembly, not shown, for heating the interior of oven 16. As those skilled in the art will understand readily, range 10 has a plurality of flow control valves 18 for initiating, terminating and controlling the rate of gas flow to cooking locations on cook top 14. Range 10 is supported on casters 20, by which range 10 can be moved a short distance to clean the area around the range.
  • [0021]
    Burner head assembly 12 includes a first burner head 22 and a second burner head 24 at which combustion of gaseous fuel occurs. A single piece, monolithic casting 30 forms a first venturi 32 associated with a first burner head base 34 and a second venturi 36 associated with a second burner head base 38. First venturi 32 and second venturi 36 provide a flow of gas and primary combustion air for combustion at first and second burner heads 22, 24, respectively, in front and back locations, respectively, on cook top 14. First and second gas receivers 40, 42 are provided on first venturi 32 and second venturi 36, respectively. As known to those skilled in the art, each receiver 40, 42 is aligned with a different control valve 18 to receive gas therefrom when the control valve 18 is opened to allow gas to flow therethrough. Receivers 40, 42 also admit a flow of ambient air to mix with the combustible gas in first venturi 32 and second venturi 36 to provide a combustible mixture to burner heads 22, 24.
  • [0022]
    FIG. 2 illustrates burner head assembly 12 in a partial state of disassembly, to better illustrate features of the present invention. Each burner head base 34, 38 is a substantially annular body defining an open top annular channel 44 between an inner wall 46 and an outer wall 48. Annular channel 44 of burner head base 34 is visible in FIG. 2. A burner head cover 50 is provided on each burner head base 34, 38, with cover 50 on burner head base 38 being shown in FIG. 2. Each cover 50 has a plurality of gas-emitting orifices 52 therein through which a mixture of combustible gas and primary combustion air is emitted. For clarity, only some orifices 52 and not all orifices 52 are identified with a reference numeral in the drawings.
  • [0023]
    In the embodiment illustrated, first venturi 32 and second venturi 36 are configured with first burner head base 34 and second burner head base 38, respectively, to swirl the combustion mixture in opposite directions. In the embodiment shown in FIG. 2, first venturi 32 is configured with first burner head base 34 to swirl the combustion gas in a clockwise direction, and second venturi 36 is configured with second burner head base 38 to swirl the combustion gas in a counter-clockwise direction. It should be understood that the rotational directions within first and second burner head bases 34, 38 can be reversed or can be both in the same direction, either clockwise or counter-clockwise. Alterations in the orientations and angular relationships between first venturi 32 and first burner head base 34 and between second venturi 36 and second burner head base 38 can be used to make such changes in direction.
  • [0024]
    Burner head 24 and the components thereof can be seen more clearly in FIGS. 3 and 4. Burner head 50 fits on burner head base 38 and is a multi-surfaced, generally annular structure. Burner head 50 includes a primarily upwardly facing surface 54, which is a top surface of cover 50. Surfaces radially outward of upwardly facing surface 54 are generally outwardly facing, and include an upwardly and outwardly facing surface 56 adjacent upwardly facing surface 54 and a mostly outwardly facing surface 58, which is the outermost surface of cover 50.
  • [0025]
    Radially inwardly from top surface 54 in cover 50 are multiple surfaces that are generally inwardly facing. An innermost, mostly inwardly facing surface 60 is provided adjacent an inward edge 62 of cover 50. An intermediate surface 64 adjoins innermost surface 60 with top surface 54. Intermediate surface 64 is inwardly and upwardly facing.
  • [0026]
    Orifices 52 are provided only in the upwardly facing top surface 54 and generally inwardly facing surfaces 60 and 64. Orifices 52 are not provided in generally outwardly facing surfaces 56 and 58. Thus, flames 66 (FIG. 6) arising from combustion of fuel at burner head 24 are directed upwardly and inwardly and are concentrated against the center area of a bottom surface of a vessel 68 supported on a grate 70 above burner head 24. This is in contrast to known burner designs in which flames are directed outwardly to spread across the surface of a vessel supported above the burner, in which the flames may spread beyond, or wick up the side of the vessel. Concentrating the flames toward the center of the vessel improves heat transfer performance, shortening time required to achieve boiling of liquids in the vessel, and otherwise reducing the time required for heat-up of the vessel. Upwardly and inwardly facing surfaces 54, 60 and 64 are shielded from drips along outer surfaces of vessels above the burner, and therefore are less prone to fouling from boil-overs and spills.
  • [0027]
    As seen most clearly in the cross-sectional view of FIG. 4, cover 50 is removably engaged on burner head base 38. Inner edge 62 defines an inner lip 72 removably seated on inner wall 46 of burner head base 38, and an angular surface 74 is directed laterally and upwardly from inner edge 62 to inner lip 72. Angular surface 74 engages inner wall 46 and slides therealong as cover 50 is placed on burner head base 34 or 38, and directs and centers burner head cover 50 for proper positioning and seating on burner head base 34, 38. Cover 50, therefore, is self-centering. Cover 50 further includes an outer edge 80 defining an outer lip 82 that engages outer wall 48 of burner head base 34, 38. Cover 50 is thus sealed on inner wall 46 and outer wall 48 so that gas flow through channel 44 is emitted only through orifices 50.
  • [0028]
    As shown most clearly in FIG. 4, inner edge 62 is disposed lower than outer edge 80, and a zone of orifices 52 through inner most surface 60 are lower than outer edge 80. Orifices 52 through innermost surface 60 provide multiple low, centrally originating flames even on large burners.
  • [0029]
    For efficient combustion, the present invention provides control of secondary airflow in both volume and direction. The flow of air through the center opening of annular burner heads 22 and 24 is controlled by a restrictor plate 90 disposed within the center opening. Restrictor plates 90 have lateral tabs 92 secured to feet 94 of bases 34 and 38, to provide a substantially annular gap 96 between restrictor plate 90 and burner head base 38 and/or cover 50. Three tabs 92 are shown in the drawings, but fewer or more can be used. Attachment can be by screw, bolts or other suitable means. Further control of secondary airflow is provided through a central aperture 98 in restrictor plate 90. A slot 100 is provided in restrictor plate 90, to hold a pilot burner (not shown) of a pilot light system for igniting fuel at burner heads 22, 24.
  • [0030]
    Through selection of the size and shape of annular gap 96 and central aperture 98 for the size and performance of the burner, the proper amount of secondary air is allowed to enter and is properly directed for more efficient burner performance. Secondary combustion air flowing through annular gap 96 rises through burner head 22 or 24, near to and first encountering the lower originating flames from orifices 52 in innermost surface 60. The secondary combustion air provides complete, efficient combustion of gas emitted from orifices 52 in innermost surface 60. Remaining air from annular gap 96, and air rising through central aperture 98 disperses outwardly, providing secondary air for complete, efficient combustion of gas emitted from orifices 52 in intermediate surface 64 and in top surface 54. With flames directed upwardly and inwardly, air for secondary combustion is limited primarily to the air that flows upwardly through annular burner heads 22 and 24, and can be controlled by restrictor plate 90. This is in contrast to known burner designs with flames originating from orifices in outwardly facing surfaces that are exposed to virtually limitless and uncontrollable flow of ambient air.
  • [0031]
    It should be understood that the detailed structures described above for burner head 24, including a cover 50 and a restrictor plate 90, are provided in similar manner and construction for burner head 22.
  • [0032]
    The single casting 30 for both burner head 22 and burner head 24 having facilitates efficient disassembly and re-assembly for cleaning. Casting 30 can be removed with restrictor plates 90 fastened thereto, and with covers 50 remaining in place on burner head bases 34 and 38. Alternatively, covers 50 can be removed from burner head bases 34 and 38 before casting 30 is removed from cook top 14. Since covers 50 are self-centering and self-positioning on bases 34 and 38, removal and re-installation for cleaning are quick and easy.
  • [0033]
    Variations and modifications of the foregoing are within the scope of the present invention. It is understood that the invention disclosed and defined herein extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. All of these different combinations constitute various alternative aspects of the present invention. The embodiments described herein explain the best modes known for practicing the invention and will enable others skilled in the art to utilize the invention. The claims are to be construed to include alternative embodiments to the extent permitted by the prior art.
  • [0034]
    Various features of the invention are set forth in the following claims.

Claims (31)

  1. 1. A gaseous fuel burner assembly comprising:
    a venturi;
    an annular burner head associated with said venturi for the combustion of gaseous fuel from said venturi;
    said burner head having outwardly facing, upwardly facing and inwardly facing surfaces; and
    said burner head defining gas-emitting orifices, said gas-emitting orifices provided only on at least one of said upwardly facing and said inwardly facing surfaces of said burner head.
  2. 2. The burner assembly of claim 1, said burner head having a top surface, an innermost surface and an angular surface therebetween.
  3. 3. The burner assembly of claim 2, said orifices defined in said top, said innermost and said angular surfaces.
  4. 4. The burner assembly of claim 1, said burner head including a base defining a substantially annular open top channel and a removable cover, with said orifices defined in said cover.
  5. 5. The burner assembly of claim 4, said cover having an outer edge defining an outer lip engaging said base and an inner edge defining an inner lip engaging said base.
  6. 6. The burner assembly of claim 5, said inner edge being lower than said outer edge.
  7. 7. The burner assembly of claim 6, some of said orifices being near said inner edge and lower than said outer edge.
  8. 8. The burner assembly of claim 6, said inner lip having an angular surface directed laterally and upwardly from said inner edge.
  9. 9. The burner assembly of claim 1, including a monolithic body forming first and second gas receivers, first and second venturis and first and second burner head bases; and said burner assembly having first and second burner head covers removable engaged on said first and second burner head bases.
  10. 10. The burner assembly of claim 9, said first burner head base and said second burner head base configured with said first and second venturis, respectively, for developing gas flows through said first and second burner head bases directed oppositely with respect to each other.
  11. 11. The burner assembly of claim 1, including an airflow restrictor plate limiting airflow through the center of said annular burner head.
  12. 12. The burner assembly of claim 11, said restrictor plate and said burner head defining an annular gap therebetween.
  13. 13. The burner assembly of claim 11, said restrictor plate defining an aperture therethrough substantially at the center of said restrictor plate.
  14. 14. The burner assembly of claim 11, said restrictor plate including a slot for holding a pilot light burner head.
  15. 15. The burner assembly of claim 1, said gas-emitting orifices provided in both said upwardly facing and said inwardly facing surfaces of said burner head.
  16. 16. A gas fuel burner head comprising:
    a substantially annular base;
    a substantially annular cover having gas-emitting orifices on only at least one of upwardly and inwardly facing surfaces thereof; and
    a restrictor plate limiting airflow through the center of said substantially annular base and top.
  17. 17. The burner head of claim 16, said restrictor plate and said cover defining a space between an outer edge of said plate and an inner surface of said cover.
  18. 18. The burner head of claim 17, said plate having a hole therethrough.
  19. 19. The burner head of claim 18, said plate defining a slot for holding a pilot light.
  20. 20. The burner head of claim 16, said cover having inner and outer edges engaging said base and said inner edge being lower than said outer edge.
  21. 21. The burner head of claim 20, some of said orifices being lower than said outer edge.
  22. 22. A burner head comprising:
    a substantially hollow annular body for directing gas flow therethrough, said body having only at least one of upwardly and inwardly facing orifices for emitting gaseous fuel to be burned; and
    means controlling the flow of air through said substantially annular body.
  23. 23. The burner head of claim 22, said means including a restrictor plate disposed in a central opening defined by said substantially annular body, said restrictor plate being spaced from said substantially annular body to define an airflow gap between said restrictor plate and said substantially annular body.
  24. 24. The burner head of claim 23, said restrictor plate further including at least one hole therethrough.
  25. 25. The burner head of claim 22, said annular body being a two piece assembly including a burner base and a removable burner top.
  26. 26. A burner head comprising:
    a substantially annular burner head base having inner and outer base edges and defining an annular open top channel for directing gas flow therethrough;
    a substantially annular cover on said base, said cover having inner and outer cover edges engaging said inner and outer base edges, respectively; and
    said inner cover edge having an inner lip with an angular surface facing downwardly and laterally for positioning said cover on said base, with said inner lip disposed along the inside of said substantially annular base.
  27. 27. The burner head of claim 26, said outer cover edge defining a substantially horizontal surface engaging said base, and an outer lip extending along said base on the outside of said substantially annular base.
  28. 28. The burner head of claim 27, said outer base edge defining a step, and said substantially horizontal surface of said outer cover edge seated in said step.
  29. 29. A burner assembly for an open top cooking range, said burner assembly comprising:
    a monolithic body forming first and second gas receiver ends, first and second venturis and first and second burner head bases; and
    first and second burner head covers removable engaged on said first and second burner head bases.
  30. 30. The burner assembly of claim 29, said first burner head base and said second burner head base configured with said first and second venturis, respectively, for developing gas flows through said first and second burner head bases directed oppositely with respect to each other.
  31. 31. The burner assembly of claim 29, said monolithic body including tabs for securing a pilot gas tube.
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US12640334 US20100154776A1 (en) 2005-01-05 2009-12-17 Cooking range burner head assembly

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Cited By (11)

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US20060292506A1 (en) * 2005-06-09 2006-12-28 Polidoro S.P.A. Gas burner equipped with a cooling system
WO2011140003A1 (en) * 2010-05-03 2011-11-10 Premark Feg L.L.C. Cooking range burner arrangement
DE102008019572B4 (en) * 2007-04-18 2012-03-01 Mareno Ali S.P.A. Burner crown with discharge holes at different levels and alternately in one piece, with high power for burners of industrial kitchens for cooking food
WO2012166697A1 (en) * 2011-06-01 2012-12-06 Premark Feg L.L.C. Method of converting an open-top gas burner arrangement into an infrared radiant burner arrangement
CN103307599A (en) * 2013-06-29 2013-09-18 广东万和电气有限公司 Internal combustion burner for domestic gas stove
FR2999276A1 (en) * 2012-12-10 2014-06-13 Applic Gaz Sa Gas burner comprising a burner head
DE102013105874A1 (en) * 2013-06-06 2014-12-11 Isofrost Gmbh Gas burner assembly
US9541294B2 (en) 2013-08-06 2017-01-10 Whirlpool Corporation Inner swirling flame gas burner
EP2390569A3 (en) * 2010-05-24 2017-10-18 A.R.C. S.r.l. A burner for professional or domestic gas cookers, particularly of the type of vertical-flame burners adapted for cooking with woks and the like
US20170314779A1 (en) * 2014-11-13 2017-11-02 A. O. Smith Corporation Gas premix burner and gas water heater
KR101856453B1 (en) * 2017-09-29 2018-05-10 김종석 High efficiency gas burner and gas rice cooker having the same

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EP2390569A3 (en) * 2010-05-24 2017-10-18 A.R.C. S.r.l. A burner for professional or domestic gas cookers, particularly of the type of vertical-flame burners adapted for cooking with woks and the like
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CN103307599A (en) * 2013-06-29 2013-09-18 广东万和电气有限公司 Internal combustion burner for domestic gas stove
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