EP1249665B1 - Gas burner and cooktop provided with such gas burner - Google Patents

Gas burner and cooktop provided with such gas burner Download PDF

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Publication number
EP1249665B1
EP1249665B1 EP20010109007 EP01109007A EP1249665B1 EP 1249665 B1 EP1249665 B1 EP 1249665B1 EP 20010109007 EP20010109007 EP 20010109007 EP 01109007 A EP01109007 A EP 01109007A EP 1249665 B1 EP1249665 B1 EP 1249665B1
Authority
EP
European Patent Office
Prior art keywords
spreader unit
flame spreader
burner
cooktop
gas 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
EP20010109007
Other languages
German (de)
French (fr)
Other versions
EP1249665A1 (en
Inventor
Ermanno c/o Whirlpool Europe s.r.l. Buzzi
Marco c/o Whirlpool Europe s.r.l. Maritan
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.)
Whirlpool Corp
Original Assignee
Whirlpool Corp
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 Whirlpool Corp filed Critical Whirlpool Corp
Priority to EP20010109007 priority Critical patent/EP1249665B1/en
Priority to ES01109007T priority patent/ES2269247T3/en
Priority to DE2001622107 priority patent/DE60122107T2/en
Publication of EP1249665A1 publication Critical patent/EP1249665A1/en
Application granted granted Critical
Publication of EP1249665B1 publication Critical patent/EP1249665B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • 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
    • 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 relates to gas burners, in particular applied to heating units in gas cooking appliances such as ranges and cooktops, comprising a body and a flame spreader unit mounted thereon, the body comprising supports for a pan or the like placed around the flame spreader unit.
  • a gas burner of the above type is disclosed in EP-A-123007 where the burner body is disk-shaped and has a central hole surrounded by a circular rise which defines the seat of a traditional flame spreader unit. Around the circular rise the disk presents four radial supports which define the grid integral with the burner.
  • Direct open flame atmospheric burners for cooking hobs application are generally disposed with a central flame spreader unit or burner head protruding over the hob surface, having a plurality of primary burner ports formed as slots or holes at port locations and distributed about the periphery of the flame spreader unit forming one or more concentric crowns of radial partially premixed Bunsen-type flamelets.
  • the object of the present invention is to overcome the above-mentioned configuration by providing a gas burner with an improved flow pattern. According to the invention, such object is obtained thanks to the feature reported in the appended claims.
  • the overall thickness of the gas burner can be greatly reduced since the flame spreader unit does not add any "height" to the overall height of the burner.
  • the supports for a pan or the like are projections raised from the body at a predetermined distance from the flame spreader unit.
  • the use of a peculiar flame spreader unit does allow a highly aerated combustion that leads to short light blue flames.
  • Low noise and low pollutant emission are typical of highly aerated flames as the ones obtained with a burner according to the invention.
  • the resulting short flame further reduces the distance from the pans, thus removing the grids and replacing them with pan supports integrated onto the burner body.
  • the burner design as a single or multiple slots flame port, can be realized in a single component or provided with a separated supplementary flame spreader unit.
  • the low height of the burner favors the integration of the grid in the material of the burner body, improving the cleaning, handling and aesthetics of the whole top: one-wipe ease of cleaning is one of the most attractive features from the customer point of view.
  • the reduced height of the pan over the top increases also pan stability and handling.
  • the gas burner comprises a flame spreader unit or burner cap 1, a burner body or base 2 and a connection flange 3.
  • the burner body 2 presents an integrated pan support in form of three projections 4 with a flat upper surface 4a.
  • the upper surface 1 a of the flame spreader unit 1 is flush with the upper surface of the burner body 2. This means that there is no step or ridge between the upper surface of the body 2 and the upper surface 1a of the flame spreader unit 1.
  • the burner body 2 is disk-shaped and comprises a central circular seat for the flame spreader unit 1.
  • the flame spreader unit 1 and the burner body 2 in their functional relative position form an expansion chamber 5 in which the mixture formed in the venturi system V (figure 3) by natural air entrainment of the gas jet energy flows.
  • the flame spreader unit 1 includes a plurality of slots 6 to form a radial flame pattern; the slots extend radially in a ring zone of the upper surface of the flame spreader unit 1, and communicate with the expansion chamber 5 of the burner body 2.
  • the gas-air mixture outlet is located at the downflow edge of the slots 6 on the flame spreader unit and the resulting flame, when the burner is fed with a gas-air mixture, forms a pattern of flamelets radially distributed over the flame spreader unit 1 and anchored to the burner slots.
  • the supports 4, integrated into the burner body 2 or mounted on it, are placed at a determined distance from the slots 6, and the upper surfaces 4a of the supports define a plane that corresponds to the bottom of the pan or the like (not shown). The distance of this plane from the slots 6 is calculated in order to perform a good combustion and to give high efficiency performance.
  • the burner body 2 has, in its lower side, a tubular shaft 7 that slides into a connection hub 8 of the connection flange 3.
  • the flange hub 8 connects the venturi system V to the burner body 2.
  • the connection e.g. using o-rings or bayonets, assures sealing of the burner assembly while the gas mixture is flowing.
  • the burner body 2 has, on its lower side, protruding pins 9 to allow burner orientation and placement into relative embossed areas in the cooktop surface C.
  • Another configuration may have protruding pins in the cooktop surface and embossed areas in the burner body.
  • the burner body 2 in its functional position is centered into the connection flange 3 and the protruding pins 9 set the distance of the edge 2a of the burner body 2 from the cooktop surface C, thus determining the gap for primary air suction.
  • the cooktop surface C has a round hole 20 coaxial with the burner connection flange 3 and can be fixed to said flange with any kind of fasteners.
  • the cooktop C, around the holes 20, presents dome-shaped zones D which are substantially radiused to the dome shape of the burned body 2. This reduces the risk of any spill of liquid inside the box in which the venturi system V is housed, and at the same time increases the cleanability of the cooktop due to smoothed boundaries and to the continuity of the design of the top surface.
  • the flange 3 has air intakes 10 to let air inflow from the outer surface C of the cooktop, through the gap between the burner body 2 and the cooktop and then into the box that contains the venturi system V.
  • the slots defining the flame ports are a ring-shaped slot 60 that is circularly distributed about the flame spreader unit 1 (fig. 4).
  • the resulting flame forms a single ring, or a ring that may be interrupted in two or more points along its circumference by support pins 24 (as shown in figure 4).
  • venturi system V in which the mixture gas-air flows, can be oriented either horizontally (as shown in figure 3) or vertically or at any angle to the top surface of the hob.
  • shape and number of slots 6 can be different from those shown in the attached drawing, but in any case they will assure a substantial axial flow quite different from the radial flow of the conventional gas burners.
  • the burner comprises means (not shown) for changing the dimension of the slots 6 by actuators on the flame spreader unit 1 and/or the burner body 2.
  • the burner comprises a device for flame ignition and flame detection that is integrated in the burner design to avoid protruding parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)

Description

  • The present invention relates to gas burners, in particular applied to heating units in gas cooking appliances such as ranges and cooktops, comprising a body and a flame spreader unit mounted thereon, the body comprising supports for a pan or the like placed around the flame spreader unit.
  • A gas burner of the above type is disclosed in EP-A-123007 where the burner body is disk-shaped and has a central hole surrounded by a circular rise which defines the seat of a traditional flame spreader unit. Around the circular rise the disk presents four radial supports which define the grid integral with the burner.
  • Direct open flame atmospheric burners for cooking hobs application, as the one disclosed in EP-A-123007, are generally disposed with a central flame spreader unit or burner head protruding over the hob surface, having a plurality of primary burner ports formed as slots or holes at port locations and distributed about the periphery of the flame spreader unit forming one or more concentric crowns of radial partially premixed Bunsen-type flamelets.
  • The object of the present invention is to overcome the above-mentioned configuration by providing a gas burner with an improved flow pattern. According to the invention, such object is obtained thanks to the feature reported in the appended claims.
  • According to the claimed features, the overall thickness of the gas burner can be greatly reduced since the flame spreader unit does not add any "height" to the overall height of the burner.
  • Preferably the supports for a pan or the like are projections raised from the body at a predetermined distance from the flame spreader unit.
  • The use of a peculiar flame spreader unit does allow a highly aerated combustion that leads to short light blue flames. Low noise and low pollutant emission are typical of highly aerated flames as the ones obtained with a burner according to the invention.
    The resulting short flame further reduces the distance from the pans, thus removing the grids and replacing them with pan supports integrated onto the burner body.
    The burner design, as a single or multiple slots flame port, can be realized in a single component or provided with a separated supplementary flame spreader unit.
  • The low height of the burner favors the integration of the grid in the material of the burner body, improving the cleaning, handling and aesthetics of the whole top: one-wipe ease of cleaning is one of the most attractive features from the customer point of view. The reduced height of the pan over the top increases also pan stability and handling.
    The present invention will be described further, by way of examples, with reference to the accompanying drawings, in which:
    • figure 1 is a perspective view of a burner according to the invention,
    • figure 2 is an exploded view of the burner of figure 1,
    • figure 3 is a section view of the burner of figure 1 as it is installed in a gas cooking hob, and
    • figure 4 is a prospective view of a second embodiment of a burner according to the invention.
  • The gas burner comprises a flame spreader unit or burner cap 1, a burner body or base 2 and a connection flange 3. The burner body 2 presents an integrated pan support in form of three projections 4 with a flat upper surface 4a. The upper surface 1 a of the flame spreader unit 1 is flush with the upper surface of the burner body 2. This means that there is no step or ridge between the upper surface of the body 2 and the upper surface 1a of the flame spreader unit 1.
  • The realization of the assembly burner body and flame spreader unit in two pieces is described and shown only as an example, since such assembly may be realized in one piece. In the configuration in which the flame spreader unit 1 is removable from the burner body 2, there is no need to place it in a predetermined angular position relative to the burner body.
  • The burner body 2 is disk-shaped and comprises a central circular seat for the flame spreader unit 1.
  • The flame spreader unit 1 and the burner body 2 in their functional relative position form an expansion chamber 5 in which the mixture formed in the venturi system V (figure 3) by natural air entrainment of the gas jet energy flows.
  • In the preferred embodiment shown in figures 1-3, the flame spreader unit 1 includes a plurality of slots 6 to form a radial flame pattern; the slots extend radially in a ring zone of the upper surface of the flame spreader unit 1, and communicate with the expansion chamber 5 of the burner body 2. The gas-air mixture outlet is located at the downflow edge of the slots 6 on the flame spreader unit and the resulting flame, when the burner is fed with a gas-air mixture, forms a pattern of flamelets radially distributed over the flame spreader unit 1 and anchored to the burner slots.
  • The supports 4, integrated into the burner body 2 or mounted on it, are placed at a determined distance from the slots 6, and the upper surfaces 4a of the supports define a plane that corresponds to the bottom of the pan or the like (not shown). The distance of this plane from the slots 6 is calculated in order to perform a good combustion and to give high efficiency performance.
  • The burner body 2 has, in its lower side, a tubular shaft 7 that slides into a connection hub 8 of the connection flange 3. The flange hub 8 connects the venturi system V to the burner body 2. The connection, e.g. using o-rings or bayonets, assures sealing of the burner assembly while the gas mixture is flowing.
  • Furthermore, the burner body 2 has, on its lower side, protruding pins 9 to allow burner orientation and placement into relative embossed areas in the cooktop surface C. Another configuration may have protruding pins in the cooktop surface and embossed areas in the burner body.
  • The burner body 2 in its functional position is centered into the connection flange 3 and the protruding pins 9 set the distance of the edge 2a of the burner body 2 from the cooktop surface C, thus determining the gap for primary air suction. The cooktop surface C has a round hole 20 coaxial with the burner connection flange 3 and can be fixed to said flange with any kind of fasteners. The cooktop C, around the holes 20, presents dome-shaped zones D which are substantially radiused to the dome shape of the burned body 2. This reduces the risk of any spill of liquid inside the box in which the venturi system V is housed, and at the same time increases the cleanability of the cooktop due to smoothed boundaries and to the continuity of the design of the top surface.
    The flange 3 has air intakes 10 to let air inflow from the outer surface C of the cooktop, through the gap between the burner body 2 and the cooktop and then into the box that contains the venturi system V.
  • According to a second embodiment of the invention, the slots defining the flame ports are a ring-shaped slot 60 that is circularly distributed about the flame spreader unit 1 (fig. 4). The resulting flame forms a single ring, or a ring that may be interrupted in two or more points along its circumference by support pins 24 (as shown in figure 4).
  • The venturi system V, in which the mixture gas-air flows, can be oriented either horizontally (as shown in figure 3) or vertically or at any angle to the top surface of the hob. Moreover the shape and number of slots 6 can be different from those shown in the attached drawing, but in any case they will assure a substantial axial flow quite different from the radial flow of the conventional gas burners.
  • According to another embodiment of the present invention, in order to provide always a correct gas and air mixture for combustion, the burner comprises means (not shown) for changing the dimension of the slots 6 by actuators on the flame spreader unit 1 and/or the burner body 2.
  • According to a further feature of the burner according to the invention, the burner comprises a device for flame ignition and flame detection that is integrated in the burner design to avoid protruding parts.

Claims (10)

  1. A gas burner comprising a body (2) and a flame spreader unit (1), the burner body (2) comprising supports (4) for a pan or the like disposed around the flame spreader unit, characterized in that the upper surface (1a) of the flame spreader unit (1) is substantially flush with the upper surface of the body (2).
  2. A gas burner according to claim 1, characterized in that the supports for a pan or the like are projections (4) raised from the body (2) at a predetermined distance from the flame spreader unit (1).
  3. A gas burner according to claim 1 or 2, characterized in that the flame spreader unit (1) has a plurality of rectilinear slots (6) extending radially in a ring shaped region of the flame spreader unit (1).
  4. A gas burner according to claim 1 or 2, characterized in that the flame spreader unit (1) has a ring shaped slot (60).
  5. A gas burner according to any of the preceding daims, characterized in that the burner body (2) and the flame spreader unit (1) forms a one piece only.
  6. A gas burner according to any of the preceding claims, characterized in that the flame spreader unit (1) is placed in the upper portion of a circular expansion chamber (5) removably connected to a flange hub (3, 8) supported by the cooktop (C), the same flange hub (3, 8) being connected to a venturi system (V) placed under the cooktop (2).
  7. A cooktop having a plurality of gas burners each comprising a body (2) and a flame spreader unit (1), the burner body comprising supports (4) for a pan or the like disposed around the flame spreader unit, characterized in that the upper surface (1a) of the flame spreader unit (1) is substantially flush with the upper surface of the body (2).
  8. A cooktop according to claim 7, characterized in that each burner body (2) is substantially dome shaped and is radiused to dome shaped portions (D) of the upper surface (C) of the cooktop.
  9. A cooktop according to claim 7 or 8, characterized in that each burner body (2) is removably mounted in a flange hub (3, 8) fixed under the cooktop (C) around a circular hole (20) through which the burner body is inserted, the flange hub (3, 8) having a disk portion (3) around the central portion (8) in which apertures (10) are provided for the air intake to a venturi system (V) upstream each gas burner.
  10. A cooktop according to claim 8, characterized in that the venturi system (V) is fixed to the flange hub (3, 8) upstream the burner body (2).
EP20010109007 2001-04-11 2001-04-11 Gas burner and cooktop provided with such gas burner Expired - Lifetime EP1249665B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP20010109007 EP1249665B1 (en) 2001-04-11 2001-04-11 Gas burner and cooktop provided with such gas burner
ES01109007T ES2269247T3 (en) 2001-04-11 2001-04-11 GAS BURNER AND KITCHEN HOB PROVIDED WITH SUCH BURNER.
DE2001622107 DE60122107T2 (en) 2001-04-11 2001-04-11 Gas burner and stove with such a gas burner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20010109007 EP1249665B1 (en) 2001-04-11 2001-04-11 Gas burner and cooktop provided with such gas burner

Publications (2)

Publication Number Publication Date
EP1249665A1 EP1249665A1 (en) 2002-10-16
EP1249665B1 true EP1249665B1 (en) 2006-08-09

Family

ID=8177110

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010109007 Expired - Lifetime EP1249665B1 (en) 2001-04-11 2001-04-11 Gas burner and cooktop provided with such gas burner

Country Status (3)

Country Link
EP (1) EP1249665B1 (en)
DE (1) DE60122107T2 (en)
ES (1) ES2269247T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2737250B1 (en) 2011-07-29 2017-09-27 Whirlpool EMEA S.p.A Gas burner, in particular for a food cooking appliance

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7650882B2 (en) * 2005-04-22 2010-01-26 General Electric Company Pot supports and burner systems including same
EP2072901B1 (en) * 2007-12-17 2019-06-05 Candy S.p.A. Household gas cooktop
BRMU8900546Y1 (en) * 2009-02-26 2017-09-26 Electrolux Do Brasil Sa STAMPED STOVE TABLE
ES2361106B1 (en) * 2009-04-17 2012-04-20 Bsh Electrodomesticos España S.A COVER PLATE FOR A COOKING FIELD.
ITTO20111004A1 (en) * 2011-11-03 2013-05-04 Indesit Co Spa GAS BURNER, IN PARTICULAR FOR A COOKING APPLIANCE
ITTO20111002A1 (en) * 2011-11-03 2013-05-04 Indesit Co Spa GAS BURNER, IN PARTICULAR FOR A COOKING APPLIANCE
ITTO20111001A1 (en) * 2011-11-03 2013-05-04 Indesit Co Spa GAS BURNER OF A COOKING HOB, IN PARTICULAR FOR HOUSEHOLD USE
ITTO20111003A1 (en) * 2011-11-03 2013-05-04 Indesit Co Spa GAS BURNER, IN PARTICULAR FOR A COOKING APPLIANCE
HUE039722T2 (en) * 2012-06-26 2019-02-28 Lowry Daniel H Simmer plate for commercial and residential stoves
PL2986913T3 (en) 2013-04-17 2019-07-31 Sabaf S.P.A. Gas burner for cooking hobs
USD796900S1 (en) 2015-12-17 2017-09-12 Dan Lowry Llc Heat diffuser

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
IT8300524V0 (en) * 1983-03-25 1983-03-25 Defendi Off Mec Srl SUPPORT PLATE FOR GAS BURNERS BUILT IN A SINGLE METAL BLOCK
IL78690A (en) * 1986-02-20 1990-07-12 Vanderman Zvi Gas burner
FR2656677B1 (en) * 1989-12-29 1994-07-29 Gaz De France GAS BURNER FOR COOKING HOB, COOKER OR THE LIKE.
GB2240840B (en) * 1990-02-12 1993-08-04 Lin Shing Juh A gas burner
FR2756038B1 (en) * 1996-11-15 1999-02-12 Gaz De France GAS BURNER FORMING DEVICE WITH VARIABLE CONTAINER SUPPORT

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2737250B1 (en) 2011-07-29 2017-09-27 Whirlpool EMEA S.p.A Gas burner, in particular for a food cooking appliance

Also Published As

Publication number Publication date
DE60122107D1 (en) 2006-09-21
DE60122107T2 (en) 2007-02-08
ES2269247T3 (en) 2007-04-01
EP1249665A1 (en) 2002-10-16

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