US20110265782A1 - Cooking range burner arrangement - Google Patents
Cooking range burner arrangement Download PDFInfo
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- US20110265782A1 US20110265782A1 US13/099,465 US201113099465A US2011265782A1 US 20110265782 A1 US20110265782 A1 US 20110265782A1 US 201113099465 A US201113099465 A US 201113099465A US 2011265782 A1 US2011265782 A1 US 2011265782A1
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- Prior art keywords
- flow path
- bowl structure
- burner head
- arrangement
- secondary air
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- 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
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- 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
- F23D14/08—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 axial outlets at the burner head
- F23D14/085—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 axial outlets at the burner head with injector axis inclined to the burner head axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/14—Special features of gas burners
- F23D2900/14062—Special features of gas burners for cooking ranges having multiple flame rings
Definitions
- the present invention relates to gas fired cooking ranges and, more particularly, to burner assemblies used in such ranges.
- 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.
- Factors such as flame intensity and efficiency, burner assembly cleanability and fuel consumption efficiency are important to both residential and commercial installations.
- 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 and heat transfer to the cooking vessel atop the burner.
- a cooking range burner arrangement includes an annular burner head with a plurality of gas orifices.
- the burner head includes a centrally disposed opening defining a first flow path for flowing secondary air upward into a combustion space proximate the burner head.
- a bowl arrangement associated with the burner head defines a second flow path and a third flow path.
- the second flow path is located for flowing secondary air to the combustion space above the secondary flow provided by the first flow path.
- the third flow path is located for flowing secondary air into the combustion space above the secondary flow provided by the second flow path.
- the second flow path may be radially outward of the first flow path, and the third flow path radially outward of the second flow path.
- the second flow path may feed secondary air to a cone and/or mantle flame region and the third flow path may feed secondary air to a tail flame region.
- the bowl arrangement may include an inner bowl structure disposed to define the first air flow path between an upper portion of the burner head and a lower portion of the inner bowl structure, and an outer bowl structure disposed at least partially about the inner bowl structure to define the second air flow path at least partially between the inner bowl structure and the outer bowl structure.
- a inner bowl structure may have a bottom edge aligned with and positioned above a top surface of the burner head, a wall of the inner bowl structure extending upwardly and radially outwardly, and an outer bowl structure may have a bottom edge positioned higher than the bottom edge of the inner bowl structure and lower than a top edge of the inner bowl structure, a wall of the outer bowl structure extending upwardly and outwardly, and a top edge of the outer bowl structure positioned higher than the top edge of the inner bowl structure.
- a plate may be positioned above a second bowl structure for being heated by combustion in the combustion space, the plate including a plurality of heat exchange fin structures extending downward toward the combustion space.
- a multiplicity of the heat exchange fin structures may be arranged to extend radially relative to a central vertical axis of the burner head.
- radially inward edges of the multiplicity of heat exchange fin structures may be spaced outward of the central vertical axis, a center region of the bottom side of the plate lacking any heat exchange fin structure.
- the multiplicity of heat exchange fin structures may include a first set of heat exchange fin structures with radially inward edges terminating a first distance from the central vertical axis and a second set of heat exchange fin structures with radially inward edges terminating a second distance from the central vertical axis, the second distance greater than the first distance.
- a radial length of each heat exchange fin structure of the second set of heat exchange fin structures may be substantially less than a radial length of each heat exchange fin of the first set of heat exchange fin structures.
- an inner bowl structure may have a bottom edge aligned with and positioned above a top surface of the burner head, a wall of the inner bowl structure extending upwardly and radially outwardly; an outer bowl structure may have a bottom edge positioned higher than the bottom edge of the inner bowl structure and lower than a top edge of the inner bowl structure, a wall of the outer bowl structure extending upwardly and outwardly; and a top edge of the outer bowl structure may be positioned higher than the top edge of the inner bowl structure, the top edge of the outer bowl structure positioned adjacent lower edges of heat exchange fin structures.
- a cooking range burner arrangement in another aspect, includes an annular burner head with a plurality of gas orifices, the burner head including a centrally disposed opening defining a first flow path for flowing secondary air upward into a combustion space proximate the burner head.
- a secondary air flow metering arrangement is associated with the burner head, the secondary air flow metering arrangement defining a second flow path and a third flow path, the second flow path located for flowing secondary air to the combustion space above the secondary flow provided by the first flow path, the third flow path located for flowing secondary air to the combustion space above the secondary flow provided by the second flow path.
- a kit for modifying an open-top gas burner including a burner head includes an inner bowl structure for positioning above the burner head, an outer bowl structure disposed at least partially about the inner bowl structure to define an air flow path at least partially between the inner bowl structure and the outer bowl structure; and a plate member for positioning above the inner and outer bowl structure.
- FIG. 1 is a perspective view of one embodiment of a gas cooking range
- FIG. 2 is a perspective view of one embodiment of a dual burner head unit
- FIG. 3 is a perspective view of a plate for a burner arrangement
- FIG. 4 is a bottom view of the plate of FIG. 3 ;
- FIG. 5 is a perspective view of an outer bowl structure
- FIG. 6 is a perspective view of an inner bowl structure
- FIG. 7 is a cross-section showing the plate of FIG. 3 and bowls of FIGS. 5 and 6 in relation to a burner head;
- FIG. 8 is a perspective view of another plate
- FIG. 9 is a bottom view of the plate of FIG. 8 ;
- FIG. 10 is a perspective view of a support unit
- FIG. 11 is a cross-section showing the plate of FIG. 8 , bowls of FIGS. 5 and 6 and support unit of FIG. 10 in relation to a burner head.
- numeral 10 designates a gas cooking range having a cooktop 14 with multiple cooking locations 11 (e.g., six in the illustrated embodiment, 3 front and 3 back) with associated burner heads.
- pairs of burner heads are formed by burner head assemblies 12 (per FIG. 2 ), but each burner head could be formed and fed with gas on an individual basis.
- Range 10 further includes an oven 16 .
- the range may be a commercial range or a residential range, taking on a variety of outward configurations, of which FIG. 1 is merely exemplary.
- Range 10 includes a gas circuit for supplying combustible gas to each burner head and to an oven burner assembly (not shown).
- the gas circuit includes a plurality of flow control valves 18 provided for initiating, terminating and controlling the rate of gas flow to cooking locations 11 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. However, embodiments without casters are contemplated.
- Exemplary 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. 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 .
- FIG. 2 illustrates burner head assembly 12 in a partial state of disassembly.
- Each burner head base 34 , 38 may be 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.
- Burner head cover 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 .
- 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.
- each burner head is open, with a restrictor plate 70 positioned therein for metering secondary air flow to the combustion space via central opening 72 of the plate and an outer gap 74 formed between the plate and the burner head.
- the restrictor plate may also hold an igniter (e.g., via a slot 76 ).
- FIGS. 3 and 4 show perspective and bottom plan views respectively of a plate structure 100 having a top surface 102 and a bottom surface 104 .
- the bottom surface includes a plurality of heat exchange fins 106 extending downwardly therefrom.
- the fins extend radially relative to a center 108 of the plate and terminate at positions away from the center, such that a center region of the bottom side of the plate lacks any heat exchange fin structure.
- the heat exchange fins include a set of heat exchange fins 106 A with radially inward edges terminating a radial distance R 1 from the center of the plate and a set of heat exchange fins 106 B with radially inward edges terminating a large radial distance R 2 from the center of the plate.
- the fins 106 A and 106 B are arranged in an alternating manner about the plate center.
- a radial length of each heat exchange fin 106 B is substantially less than a radial length of each heat exchange fin 106 A (e.g., fins 106 B have a radial length that is 60% or less the radial length of fins 106 A).
- variations are possible.
- fins 106 A extend further outward of the plate and include downwardly extend portions to define feet 110 that can support the plate.
- the plate may be made of stainless steel, hot rolled steel, cast iron or other materials. In some embodiments all or portions (e.g., the bottom surface and/or fins) of the plate may be coated to further improve heat transfer to the plate structure (e.g., coated with copper via a plasma spray process). Laminate plate structures could also be used.
- FIGS. 5 and 6 depict components of a secondary air metering arrangement.
- an inner bow structure 120 and outer bowl structure 122 are provided.
- the term “bowl” is used in connection with the structures as they each have a respective top edge 124 , 126 that is spaced outward of the bottom edge 128 , 130 in the manner of a typical bowl.
- the bowl structures are open at the bottom for purpose of their use in the secondary air flow metering as will be described below.
- the range housing 140 supports a range aeration pan unit 142 .
- a burner head 24 with associated restrictor plate is provided to define a center opening 72 and an annular opening 74 .
- the bowl structures 124 and 126 are positioned for metering air flow to the combustion spaced, which is generally shown by dashed line area 144 .
- the inner bowl structure 120 has its bottom edge 128 aligned with and positioned above the top surface of the burner head 24 , and the wall of the inner bowl structure extends upwardly and radially outwardly.
- the outer bowl structure 122 has its bottom edge 130 positioned higher than the bottom edge 128 of the inner bowl structure 120 and lower than the top edge 124 of the inner bowl structure.
- the wall of the outer bowl structure extends upwardly and radially outwardly.
- the top edge 126 of the outer bowl structure 122 is positioned higher than the top edge 124 of the inner bowl structure 120 .
- the top edge of the outer bowl structure is positioned proximate (e.g., immediately adjacent or in contact with) the bottom edge of the fin structures.
- the inner bowl structure may be supported by radially extending feet that engage the burner head, and the outer bowl structure may be supported on the inner bowl structure (e.g., via radially outward extending structure on the inner bowl and corresponding radially inward extending structure on the outer bowl).
- the pan unit 142 may include structure that supports the inner bowl, and the outer bowl may be supported by either the inner bowl or the pan unit 142 .
- Secondary air is delivered to the combustion space 144 via flow paths 150 and 152 upward through the center of the burner head 24 . Secondary air is also delivered to the combustion space 144 via a flow path 154 between the bottom edge 128 of the inner bowl and the upper surface of the burner head. Secondary air is further delivered to the combustion space 144 via a flow path 156 between the inner and outer bowl. Notably, flow path 154 is radially outward of the flow paths 150 and 152 , and flow path 156 is radially outward of the flow path 154 .
- FIGS. 8-11 An alternative embodiment is shown in FIGS. 8-11 , where a plate structure 170 includes radially extending heat exchange fins 172 A, 172 B on its bottom surface, but no feet for supporting the plate. Instead, certain fins 172 A including a support extension 174 that is configured and sized to rest atop a ring structure 176 of a support unit 178 , which may be of wire rod construction and may or may not be plated (e.g., nickel plated). Multiple clip structures 180 may be engaged with the support unit 178 to support both the outer bowl 122 and the inner bowl 120 . Similar secondary air flow paths 150 , 152 , 154 and 156 to the combustion space 144 are provided. A vertical central axis 190 of the burner head and overall arrangement is also shown.
- the controlled metering of secondary air to the combustion space via the defined flow paths helps to improve combustion efficiency (increasing resultant CO2 in the flue gas produced through the reduction of excess secondary air throughout the combustion process).
- the flow path 154 feeds secondary air to a cone and/or mantle flame region of the combustion space.
- the flow path 156 feeds secondary air to a tail flame region of the combustion space to help complete combustion.
- the bowls act to direct heat by reflection and metering in the secondary air to help limit outward movement of the flame.
- the bowls also provide a shielding and insulating effect that maintains heat beneath the plate, reducing jacket losses.
- the secondary flow through path 156 acts somewhat like an insulating blanket flow of air.
- the bowls also help protect the combustion space 144 from being subject to external environmental issues such as air movement around the range (e.g., via make-up air, fans used in the vicinity of the range air movement caused by persons moving in the vicinity of the range). Additionally, the combination of the plate and bowls helps prevent any boilover from reaching the burner head.
- the plate is designed to collect heat from burner flame and normally exhausted gases and renders the energy to the cooking utensil that may be positioned atop the plate.
- the collected and transferred energy is greater than the sum of open flame contact and plate to utensil contact losses, therefore yielding thermal efficiency gains.
- the gap between the burner head and bottom edge of the inner bowl may, for example, be on the order of 1/12 to 1 ⁇ 2 inch and the radial distance between the inner bowl and outer bowl may be on the order of 1 ⁇ 4 to 3 ⁇ 4 inch.
- Flue gas analysis e.g., measurement of CO and CO 2 ) may be used to determine desirable dimensions in any given instance.
- the subject secondary air metering arrangement may be provided as a kit for modifying or updating a standard gas burner arrangement in which a removable grate is positioned above the burner head. The grate is simply removed and replaced with the assembly (e.g., the support structure 178 , plate 170 and bowls 120 and 122 ).
- the inner and outer bowl 120 and 122 could be formed as a combined structure (e.g., with the outer bowl including a number of inwardly extending fingers to which the inner bowl is tack-welded).
- the bowls and plate may all be connected together in a permanent manner.
- other structures could be produced to define desired secondary air flow metering into the combustion space. Other changes and modifications could be made.
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Abstract
A cooking range burner head arrangement includes an annular burner head with a plurality of gas orifices, the burner head including a centrally disposed opening defining a first flow path for flowing secondary air upward into a combustion space proximate the burner head. A secondary air flow metering arrangement is associated with the burner head, the secondary air flow metering arrangement defining a second flow path and a third flow path, the second flow path located for flowing secondary air to the combustion space above the secondary flow provided by the first flow path, the third flow path located for flowing secondary air to the combustion space above the secondary flow provided by the second flow path.
Description
- The present application claims the benefit of U.S. provisional application No. 61/330,668, filed May 3, 2010, the entirety of which is incorporated herein by reference.
- The present invention relates to gas fired cooking ranges and, more particularly, to burner assemblies used in such ranges.
- 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.
- Factors such as flame intensity and efficiency, burner assembly cleanability and fuel consumption efficiency are important to both residential and commercial installations. 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 and heat transfer to the cooking vessel atop the burner.
- What is needed in the art are burner assemblies that are reliable, use fuel efficiently and heat vessels.
- In one aspect, a cooking range burner arrangement includes an annular burner head with a plurality of gas orifices. The burner head includes a centrally disposed opening defining a first flow path for flowing secondary air upward into a combustion space proximate the burner head. A bowl arrangement associated with the burner head defines a second flow path and a third flow path. The second flow path is located for flowing secondary air to the combustion space above the secondary flow provided by the first flow path. The third flow path is located for flowing secondary air into the combustion space above the secondary flow provided by the second flow path.
- In the foregoing aspect, the second flow path may be radially outward of the first flow path, and the third flow path radially outward of the second flow path.
- In either foregoing aspect, the second flow path may feed secondary air to a cone and/or mantle flame region and the third flow path may feed secondary air to a tail flame region.
- In any of the foregoing aspects, the bowl arrangement may include an inner bowl structure disposed to define the first air flow path between an upper portion of the burner head and a lower portion of the inner bowl structure, and an outer bowl structure disposed at least partially about the inner bowl structure to define the second air flow path at least partially between the inner bowl structure and the outer bowl structure.
- In any of the foregoing aspects, a inner bowl structure may have a bottom edge aligned with and positioned above a top surface of the burner head, a wall of the inner bowl structure extending upwardly and radially outwardly, and an outer bowl structure may have a bottom edge positioned higher than the bottom edge of the inner bowl structure and lower than a top edge of the inner bowl structure, a wall of the outer bowl structure extending upwardly and outwardly, and a top edge of the outer bowl structure positioned higher than the top edge of the inner bowl structure.
- In any of the foregoing aspects, a first bowl structure and second bowl structure may act as heat reflectors to reduce radially outward heat loss.
- In any of the foregoing aspects, a plate may be positioned above a second bowl structure for being heated by combustion in the combustion space, the plate including a plurality of heat exchange fin structures extending downward toward the combustion space.
- In the immediately foregoing aspect, a multiplicity of the heat exchange fin structures may be arranged to extend radially relative to a central vertical axis of the burner head.
- In the immediately foregoing aspect, radially inward edges of the multiplicity of heat exchange fin structures may be spaced outward of the central vertical axis, a center region of the bottom side of the plate lacking any heat exchange fin structure.
- In the immediately foregoing aspect, the multiplicity of heat exchange fin structures may include a first set of heat exchange fin structures with radially inward edges terminating a first distance from the central vertical axis and a second set of heat exchange fin structures with radially inward edges terminating a second distance from the central vertical axis, the second distance greater than the first distance.
- In the immediately foregoing aspect, a radial length of each heat exchange fin structure of the second set of heat exchange fin structures may be substantially less than a radial length of each heat exchange fin of the first set of heat exchange fin structures.
- In any of the foregoing aspects, an inner bowl structure may have a bottom edge aligned with and positioned above a top surface of the burner head, a wall of the inner bowl structure extending upwardly and radially outwardly; an outer bowl structure may have a bottom edge positioned higher than the bottom edge of the inner bowl structure and lower than a top edge of the inner bowl structure, a wall of the outer bowl structure extending upwardly and outwardly; and a top edge of the outer bowl structure may be positioned higher than the top edge of the inner bowl structure, the top edge of the outer bowl structure positioned adjacent lower edges of heat exchange fin structures.
- In another aspect, a cooking range burner arrangement includes an annular burner head with a plurality of gas orifices, the burner head including a centrally disposed opening defining a first flow path for flowing secondary air upward into a combustion space proximate the burner head. A secondary air flow metering arrangement is associated with the burner head, the secondary air flow metering arrangement defining a second flow path and a third flow path, the second flow path located for flowing secondary air to the combustion space above the secondary flow provided by the first flow path, the third flow path located for flowing secondary air to the combustion space above the secondary flow provided by the second flow path.
- In yet another aspect, a kit for modifying an open-top gas burner including a burner head includes an inner bowl structure for positioning above the burner head, an outer bowl structure disposed at least partially about the inner bowl structure to define an air flow path at least partially between the inner bowl structure and the outer bowl structure; and a plate member for positioning above the inner and outer bowl structure.
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FIG. 1 is a perspective view of one embodiment of a gas cooking range; -
FIG. 2 is a perspective view of one embodiment of a dual burner head unit; -
FIG. 3 is a perspective view of a plate for a burner arrangement; -
FIG. 4 is a bottom view of the plate ofFIG. 3 ; -
FIG. 5 is a perspective view of an outer bowl structure; -
FIG. 6 is a perspective view of an inner bowl structure; -
FIG. 7 is a cross-section showing the plate ofFIG. 3 and bowls ofFIGS. 5 and 6 in relation to a burner head; -
FIG. 8 is a perspective view of another plate; -
FIG. 9 is a bottom view of the plate ofFIG. 8 ; -
FIG. 10 is a perspective view of a support unit; and -
FIG. 11 is a cross-section showing the plate ofFIG. 8 , bowls ofFIGS. 5 and 6 and support unit ofFIG. 10 in relation to a burner head. - Referring to
FIG. 1 ,numeral 10 designates a gas cooking range having acooktop 14 with multiple cooking locations 11 (e.g., six in the illustrated embodiment, 3 front and 3 back) with associated burner heads. In one embodiment, pairs of burner heads are formed by burner head assemblies 12 (perFIG. 2 ), but each burner head could be formed and fed with gas on an individual basis.Range 10 further includes anoven 16. The range may be a commercial range or a residential range, taking on a variety of outward configurations, of whichFIG. 1 is merely exemplary. -
Range 10 includes a gas circuit for supplying combustible gas to each burner head and to an oven burner assembly (not shown). The gas circuit includes a plurality offlow control valves 18 provided for initiating, terminating and controlling the rate of gas flow tocooking locations 11 oncook top 14.Range 10 is supported oncasters 20, by whichrange 10 can be moved a short distance to clean the area around the range. However, embodiments without casters are contemplated. - Exemplary
burner head assembly 12 includes afirst burner head 22 and asecond burner head 24 at which combustion of gaseous fuel occurs. A single piece,monolithic casting 30 forms afirst venturi 32 associated with a firstburner head base 34 and asecond venturi 36 associated with a secondburner head base 38.First venturi 32 andsecond venturi 36 provide a flow of gas and primary combustion air for combustion at first andsecond burner heads cook top 14. First andsecond gas receivers first venturi 32 andsecond venturi 36, respectively. Eachreceiver different control valve 18 to receive gas therefrom when thecontrol valve 18 is opened to allow gas to flow therethrough.Receivers first venturi 32 andsecond venturi 36 to provide a combustible mixture toburner heads -
FIG. 2 illustratesburner head assembly 12 in a partial state of disassembly. Eachburner head base annular channel 44 between aninner wall 46 and anouter wall 48.Annular channel 44 ofburner head base 34 is visible inFIG. 2 . Aburner head cover 50 is provided on eachburner head base cover 50 onburner head base 38 being shown inFIG. 2 . Eachcover 50 has a plurality of gas-emittingorifices 52 therein through which a mixture of combustible gas and primary combustion air is emitted. -
Burner head cover 50 fits onburner head base 38 and is a multi-surfaced, generally annular structure.Burner head 50 includes a primarily upwardly facingsurface 54, which is a top surface ofcover 50. Surfaces radially outward of upwardly facingsurface 54 are generally outwardly facing, and include an upwardly and outwardly facingsurface 56 adjacent upwardly facingsurface 54 and a mostly outwardly facingsurface 58, which is the outermost surface ofcover 50. Radially inwardly fromtop surface 54 incover 50 are multiple surfaces that are generally inwardly facing. An innermost, mostly inwardly facingsurface 60 is provided adjacent aninward edge 62 ofcover 50. Anintermediate surface 64 adjoinsinnermost surface 60 withtop surface 54.Intermediate surface 64 is inwardly and upwardly facing. The number and arrangement of the cover surfaces could vary.Orifices 52 are shown in various of the cover surfaces, with the illustrated orifices being exemplary only. The exact location, size and number or orifices may vary, including providing orifices insurfaces restrictor plate 70 positioned therein for metering secondary air flow to the combustion space viacentral opening 72 of the plate and anouter gap 74 formed between the plate and the burner head. The restrictor plate may also hold an igniter (e.g., via a slot 76). - Referring now to
FIGS. 3-7 , one embodiment of a burner head arrangement is described.FIGS. 3 and 4 show perspective and bottom plan views respectively of aplate structure 100 having atop surface 102 and abottom surface 104. The bottom surface includes a plurality ofheat exchange fins 106 extending downwardly therefrom. The fins extend radially relative to acenter 108 of the plate and terminate at positions away from the center, such that a center region of the bottom side of the plate lacks any heat exchange fin structure. The heat exchange fins include a set ofheat exchange fins 106A with radially inward edges terminating a radial distance R1 from the center of the plate and a set ofheat exchange fins 106B with radially inward edges terminating a large radial distance R2 from the center of the plate. Thefins heat exchange fin 106B is substantially less than a radial length of eachheat exchange fin 106A (e.g.,fins 106B have a radial length that is 60% or less the radial length offins 106A). However, variations are possible. Certain offins 106A extend further outward of the plate and include downwardly extend portions to definefeet 110 that can support the plate. The plate may be made of stainless steel, hot rolled steel, cast iron or other materials. In some embodiments all or portions (e.g., the bottom surface and/or fins) of the plate may be coated to further improve heat transfer to the plate structure (e.g., coated with copper via a plasma spray process). Laminate plate structures could also be used. -
FIGS. 5 and 6 depict components of a secondary air metering arrangement. In the illustrated embodiment aninner bow structure 120 andouter bowl structure 122 are provided. The term “bowl” is used in connection with the structures as they each have a respectivetop edge bottom edge - Referring now to
FIG. 7 , a burner head arrangement cross-section is provided. Therange housing 140 supports a rangeaeration pan unit 142. Aburner head 24 with associated restrictor plate is provided to define acenter opening 72 and anannular opening 74. Thebowl structures line area 144. As shown, theinner bowl structure 120 has itsbottom edge 128 aligned with and positioned above the top surface of theburner head 24, and the wall of the inner bowl structure extends upwardly and radially outwardly. Theouter bowl structure 122 has itsbottom edge 130 positioned higher than thebottom edge 128 of theinner bowl structure 120 and lower than thetop edge 124 of the inner bowl structure. The wall of the outer bowl structure extends upwardly and radially outwardly. Thetop edge 126 of theouter bowl structure 122 is positioned higher than thetop edge 124 of theinner bowl structure 120. The top edge of the outer bowl structure is positioned proximate (e.g., immediately adjacent or in contact with) the bottom edge of the fin structures. - The inner bowl structure may be supported by radially extending feet that engage the burner head, and the outer bowl structure may be supported on the inner bowl structure (e.g., via radially outward extending structure on the inner bowl and corresponding radially inward extending structure on the outer bowl). In another implementation the
pan unit 142 may include structure that supports the inner bowl, and the outer bowl may be supported by either the inner bowl or thepan unit 142. - Secondary air is delivered to the
combustion space 144 viaflow paths burner head 24. Secondary air is also delivered to thecombustion space 144 via aflow path 154 between thebottom edge 128 of the inner bowl and the upper surface of the burner head. Secondary air is further delivered to thecombustion space 144 via aflow path 156 between the inner and outer bowl. Notably, flowpath 154 is radially outward of theflow paths path 156 is radially outward of theflow path 154. - An alternative embodiment is shown in
FIGS. 8-11 , where aplate structure 170 includes radially extendingheat exchange fins certain fins 172A including asupport extension 174 that is configured and sized to rest atop aring structure 176 of asupport unit 178, which may be of wire rod construction and may or may not be plated (e.g., nickel plated).Multiple clip structures 180 may be engaged with thesupport unit 178 to support both theouter bowl 122 and theinner bowl 120. Similar secondaryair flow paths combustion space 144 are provided. A verticalcentral axis 190 of the burner head and overall arrangement is also shown. - In the illustrated embodiments, the controlled metering of secondary air to the combustion space via the defined flow paths helps to improve combustion efficiency (increasing resultant CO2 in the flue gas produced through the reduction of excess secondary air throughout the combustion process). Notably, the
flow path 154 feeds secondary air to a cone and/or mantle flame region of the combustion space. Theflow path 156 feeds secondary air to a tail flame region of the combustion space to help complete combustion. The bowls act to direct heat by reflection and metering in the secondary air to help limit outward movement of the flame. The bowls also provide a shielding and insulating effect that maintains heat beneath the plate, reducing jacket losses. For example, the secondary flow throughpath 156 acts somewhat like an insulating blanket flow of air. The bowls also help protect thecombustion space 144 from being subject to external environmental issues such as air movement around the range (e.g., via make-up air, fans used in the vicinity of the range air movement caused by persons moving in the vicinity of the range). Additionally, the combination of the plate and bowls helps prevent any boilover from reaching the burner head. - The plate is designed to collect heat from burner flame and normally exhausted gases and renders the energy to the cooking utensil that may be positioned atop the plate. The collected and transferred energy is greater than the sum of open flame contact and plate to utensil contact losses, therefore yielding thermal efficiency gains.
- In one implementation of a burner head configuration designed to operate at an input rate of about 30,000 BTUs, the gap between the burner head and bottom edge of the inner bowl may, for example, be on the order of 1/12 to ½ inch and the radial distance between the inner bowl and outer bowl may be on the order of ¼ to ¾ inch. However, variations on these dimension are possible depending upon a variety of factors such as burner head size, number and locations of orifices, input rate etc. Flue gas analysis (e.g., measurement of CO and CO2) may be used to determine desirable dimensions in any given instance.
- The subject secondary air metering arrangement may be provided as a kit for modifying or updating a standard gas burner arrangement in which a removable grate is positioned above the burner head. The grate is simply removed and replaced with the assembly (e.g., the
support structure 178,plate 170 and bowls 120 and 122). - It is to be clearly understood that the above description is intended by way of illustration and example only and is not intended to be taken by way of limitation. For example, the inner and
outer bowl
Claims (19)
1. A cooking range burner arrangement, comprising:
an annular burner head with a plurality of gas orifices, the burner head including a centrally disposed opening defining a first flow path for flowing secondary air upward into a combustion space proximate the burner head;
a bowl arrangement associated with the burner head, the bowl arrangement defining a second flow path and a third flow path, the second flow path located for flowing secondary air to the combustion space above the secondary flow provided by the first flow path, the third flow path located for flowing secondary air into the combustion space above the secondary flow provided by the second flow path.
2. The cooking range burner arrangement of claim 1 , wherein the second flow path is radially outward of the first flow path, the third flow path is radially outward of the second flow path.
3. The cooking range burner arrangement of claim 2 wherein the second flow path feeds secondary air to a cone and/or mantle flame region and the third flow path feeds secondary air to a tail flame region.
4. The cooking range burner arrangement of claim 2 , wherein:
the bowl arrangement comprises:
an inner bowl structure disposed to define the first air flow path between an upper portion of the burner head and a lower portion of the inner bowl structure;
an outer bowl structure disposed at least partially about the inner bowl structure to define the second air flow path at least partially between the inner bowl structure and the outer bowl structure.
5. The cooking range burner arrangement of claim 4 , wherein:
the inner bowl structure has a bottom edge aligned with and positioned above a top surface of the burner head, a wall of the inner bowl structure extends upwardly and radially outwardly;
the outer bowl structure has a bottom edge positioned higher than the bottom edge of the inner bowl structure and lower than a top edge of the inner bowl structure, a wall of the outer bowl structure extends upwardly and outwardly, and a top edge of the outer bowl structure is positioned higher than the top edge of the inner bowl structure.
6. The cooking range burner arrangement of claim 5 , wherein the first bowl structure and second bowl structure act as heat reflectors to reduce radially outward heat loss.
7. The cooking range burner arrangement of claim 4 , further comprising:
a plate positioned above the second bowl structure for being heated by combustion in the combustion space, the plate including a plurality of heat exchange fin structures extending downward toward the combustion space.
8. The cooking range burner arrangement of claim 7 wherein a multiplicity of the heat exchange fin structures are arranged to extend radially relative to a central vertical axis of the burner head.
9. The cooking range burner arrangement of claim 8 wherein radially inward edges of the multiplicity of heat exchange fin structures are spaced outward of the central vertical axis, a center region of the bottom side of the plate lacking any heat exchange fin structure.
10. The cooking range burner arrangement of claim 9 wherein the multiplicity of heat exchange fin structures includes a first set of heat exchange fin structures with radially inward edges terminating a first distance from the central vertical axis and a second set of heat exchange fin structures with radially inward edges terminating a second distance from the central vertical axis, the second distance greater than the first distance.
11. The cooking range burner arrangement of claim 10 wherein a radial length of each heat exchange fin structure of the second set of heat exchange fin structures is substantially less than a radial length of each heat exchange fin of the first set of heat exchange fin structures.
12. The cooking range burner arrangement of claim 7 wherein:
the inner bowl structure has a bottom edge aligned with and positioned above a top surface of the burner head, a wall of the inner bowl structure extends upwardly and radially outwardly;
the outer bowl structure has a bottom edge positioned higher than the bottom edge of the inner bowl structure and lower than a top edge of the inner bowl structure, a wall of the outer bowl structure extends upwardly and outwardly, and a top edge of the outer bowl structure is positioned higher than the top edge of the inner bowl structure, the top edge of the outer bowl structure positioned adjacent lower edges of the heat exchange fin structures.
13. A cooking range burner arrangement, comprising:
an annular burner head with a plurality of gas orifices, the burner head including a centrally disposed opening defining a first flow path for flowing secondary air upward into a combustion space proximate the burner head;
a secondary air flow metering arrangement associated with the burner head, the secondary air flow metering arrangement defining a second flow path and a third flow path, the second flow path located for flowing secondary air to the combustion space above the secondary flow provided by the first flow path, the third flow path located for flowing secondary air to the combustion space above the secondary flow provided by the second flow path.
14. The cooking range burner arrangement of claim 13 , wherein the second flow path is radially outward of the first flow path, the third flow path is radially outward of the second flow path.
15. The cooking range burner arrangement of claim 14 wherein the second flow path feeds secondary air to a cone and/or mantle flame region and the third flow path feeds secondary air to a tail flame region.
16. The cooking range burner arrangement of claim 15 , wherein:
the secondary air flow metering arrangement comprises:
an inner bowl structure disposed to define the first air flow path between an upper portion of the burner head and a lower portion of the inner bowl structure;
an outer bowl structure disposed at least partially about the inner bowl structure to define the second air flow path at least partially between the inner bowl structure and the outer bowl structure.
17. A kit for updating an open-top gas burner including a burner head, the kit comprising:
an inner bowl structure for positioning above the burner head;
an outer bowl structure disposed at least partially about the inner bowl structure to define an air flow path at least partially between the inner bowl structure and the outer bowl structure; and
a plate member for positioning above the inner and outer bowl structure.
18. The kit of claim 17 further comprising a support unit for supporting the plate member and the bowls above the burner head.
19. The kit of claim 17 wherein the plate member includes a plurality of radially extending heat exchange fins on its lower surface.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/099,465 US20110265782A1 (en) | 2010-05-03 | 2011-05-03 | Cooking range burner arrangement |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US33066810P | 2010-05-03 | 2010-05-03 | |
US13/099,465 US20110265782A1 (en) | 2010-05-03 | 2011-05-03 | Cooking range burner arrangement |
Publications (1)
Publication Number | Publication Date |
---|---|
US20110265782A1 true US20110265782A1 (en) | 2011-11-03 |
Family
ID=44148613
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/099,465 Abandoned US20110265782A1 (en) | 2010-05-03 | 2011-05-03 | Cooking range burner arrangement |
Country Status (2)
Country | Link |
---|---|
US (1) | US20110265782A1 (en) |
WO (1) | WO2011140003A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9664394B2 (en) | 2015-06-11 | 2017-05-30 | Haier Us Appliance Solutions, Inc. | Multi-ring gas burner |
US20210372612A1 (en) * | 2020-06-02 | 2021-12-02 | Gas Technology Institute | Controlled secondary air supply range burner |
US11287138B2 (en) * | 2018-12-10 | 2022-03-29 | Bsh Home Appliances Corporation | Cooking appliance with top breathing burner having bottom breathing assist through top sheet |
WO2023099717A1 (en) * | 2021-12-03 | 2023-06-08 | BSH Hausgeräte GmbH | Gas burner, gas burner arrangement and gas stove |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2485145A (en) * | 1945-04-09 | 1949-10-18 | Grand Ind Inc | Combination burner and grate |
US5588299A (en) * | 1993-05-26 | 1996-12-31 | Simmonds Precision Engine Systems, Inc. | Electrostatic fuel injector body with igniter electrodes formed in the housing |
US20090049997A1 (en) * | 2007-08-23 | 2009-02-26 | Whirlpool Corporation | Heat distributing cooking grate |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2148777A (en) * | 1937-11-06 | 1939-02-28 | Floyd Wells Company | Gas burner and support therefor |
AU412372B2 (en) * | 1967-08-16 | 1971-04-15 | Malleys Limited | Gas burner |
DE3918722A1 (en) * | 1989-05-13 | 1990-11-22 | Oedoen Gyoergy Dipl I Kuzselka | Gas burner for domestic cooker - is constructed from three coaxial cylinders with gas flames directed radially inwards and outwards |
US20060147865A1 (en) * | 2005-01-05 | 2006-07-06 | Charles Czajka | Cooking range burner head assembly |
-
2011
- 2011-05-03 WO PCT/US2011/034877 patent/WO2011140003A1/en active Application Filing
- 2011-05-03 US US13/099,465 patent/US20110265782A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2485145A (en) * | 1945-04-09 | 1949-10-18 | Grand Ind Inc | Combination burner and grate |
US5588299A (en) * | 1993-05-26 | 1996-12-31 | Simmonds Precision Engine Systems, Inc. | Electrostatic fuel injector body with igniter electrodes formed in the housing |
US20090049997A1 (en) * | 2007-08-23 | 2009-02-26 | Whirlpool Corporation | Heat distributing cooking grate |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9664394B2 (en) | 2015-06-11 | 2017-05-30 | Haier Us Appliance Solutions, Inc. | Multi-ring gas burner |
US11287138B2 (en) * | 2018-12-10 | 2022-03-29 | Bsh Home Appliances Corporation | Cooking appliance with top breathing burner having bottom breathing assist through top sheet |
US20210372612A1 (en) * | 2020-06-02 | 2021-12-02 | Gas Technology Institute | Controlled secondary air supply range burner |
US11686472B2 (en) * | 2020-06-02 | 2023-06-27 | Gas Technology Institute | Controlled secondary air supply range burner |
WO2023099717A1 (en) * | 2021-12-03 | 2023-06-08 | BSH Hausgeräte GmbH | Gas burner, gas burner arrangement and gas stove |
Also Published As
Publication number | Publication date |
---|---|
WO2011140003A1 (en) | 2011-11-10 |
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