EP2505917B1 - Brûleur à gaz et table de cuisson - Google Patents

Brûleur à gaz et table de cuisson Download PDF

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Publication number
EP2505917B1
EP2505917B1 EP11160680.2A EP11160680A EP2505917B1 EP 2505917 B1 EP2505917 B1 EP 2505917B1 EP 11160680 A EP11160680 A EP 11160680A EP 2505917 B1 EP2505917 B1 EP 2505917B1
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EP
European Patent Office
Prior art keywords
air
gas
burner unit
burner
distribution chamber
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.)
Active
Application number
EP11160680.2A
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German (de)
English (en)
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EP2505917A1 (fr
Inventor
Aldo Fumagalli
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.)
Candy SpA
Original Assignee
Candy SpA
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 Candy SpA filed Critical Candy SpA
Priority to ES11160680.2T priority Critical patent/ES2694766T3/es
Priority to TR2018/16544T priority patent/TR201816544T4/tr
Priority to EP11160680.2A priority patent/EP2505917B1/fr
Publication of EP2505917A1 publication Critical patent/EP2505917A1/fr
Application granted granted Critical
Publication of EP2505917B1 publication Critical patent/EP2505917B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/08—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
    • 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
    • F23L5/00—Blast-producing apparatus before the fire
    • F23L5/02—Arrangements of fans or blowers
    • 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 
    • F23L9/02—Passages or apertures for delivering secondary air for completing combustion of fuel  by discharging the air above the fire
    • 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
    • F24C15/00—Details
    • F24C15/10—Tops, e.g. hot plates; Rings
    • F24C15/107—Pan supports or grates therefor
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/007—Mixing tubes, air supply regulation

Definitions

  • the present invention refers to a burner unit and to a domestic gas cook top.
  • a gas cook top comprises a support and containment structure having an upper wall with a visible surface facing upwards, a support grating arranged on the visible surface that defines a plane on which to rest containers to be heated, for example pans, and one or more combustible gas burners configured to generate a series of flames in the gap between the visible surface and the support plane to heat the containers supported by the support grating.
  • the burners for known gas cook tops usually comprise a main gas supply duct able to be connected with an external combustible gas source, for example with the gas supply network or with a gas cylinder.
  • One or more burner units are connected to the main duct through one or more partial gas ducts, respectively.
  • Each of the partial gas ducts has an adjustment valve (usually called gas tap) associated with it, which is configured to adjust the passage of gas through the partial duct between a closed position and a maximum open position.
  • an adjustment valve usually called gas tap
  • a safety valve to interrupt the passage of gas through the partial duct in response to a signal indicating an irregular operation of the burner unit.
  • Such a safety valve can be arranged upstream or downstream of the adjustment valve (with reference to the flow direction of the gas from the main duct to the burner unit) or integrated in the valve body of the adjustment valve.
  • the burner is a non-aerated burner or an atmospheric air burner (called induced air burner), in which there is a venturi tube mixer arranged in the partial duct upstream of the burner unit and suitable for sucking an amount of primary air in the partial gas flow.
  • induced air burner an atmospheric air burner
  • European patent application EP2072901A describes a domestic gas cook top with an upper wall having a visible surface, a burner unit arranged at the upper wall and configured so as to generate flames in the space between the visible surface and a pan support plane, a gas feeding system configured to feed a flow of gas to the burner unit, as well as a forced suction group suitable for sucking a volume of secondary air and feeding it to the burner unit.
  • a burner unit for a gas cook top is also known from FR2618881A2 , which discloses the preamble of claim 1.
  • FR2618881A2 discloses the preamble of claim 1.
  • the purpose of the present invention is therefore to provide a burner unit and a domestic gas cook top, having characteristics such as to obviate at least some of the drawbacks quoted with reference to the prior art.
  • a particular purpose of the present invention is to propose a burner unit and a domestic gas cook top that ensure high stability of the flame and a reliable and precise feeding of the secondary air to the flame itself.
  • a further purpose of the present invention is to configure the burner unit and the cook top so that, in operative conditions, the burner unit and the system for feeding secondary air are always completely and correctly assembled.
  • a domestic gas cook top is wholly indicated with reference numeral 1.
  • the cook top 1 comprises a support and containment structure 2 with an upper wall 3 that has a visible surface 4.
  • At the upper wall 3 there are one or more resting members 5 that support the containers to be heated, for example pans, pots, coffee makers, etc., and define a support plane 6 thereof on the side of the visible surface 4 of the upper wall 3.
  • One or more burner units 7 are arranged at the upper wall 3, preferably partially projecting and partially inserted in such an upper wall.
  • the burner units 7 are configured so as to generate flames in a space 8 between the visible surface 4 and the support plane 6 that during use corresponds with the plane of the bottom of the pan.
  • the gas cook top 1 also comprises a gas feeding system 30 supported by the support and containment structure 2 and configured to be able to feed a flow of gas 34 possibly premixed with primary air 35 ( Figure 3 ) to the burner unit 7.
  • the gas cook top also comprises a forced ventilation group with an electrical blower 9 suitable for sucking in a volume of secondary air 10 through a suction opening formed in the support and containment structure 2 and for conveying such secondary air 10 in a ventilation duct 11 that extends in the support structure 2 (at least partially, preferably completely) under the visible surface 4.
  • the ventilation duct 11 preferably extends on a lower side 12 of the upper wall 3 opposite the visible surface 4.
  • the ventilation duct 11 connects the electric ventilator 9 with the burner unit 7 so as to be able to feed the volume of secondary air 10 to the latter.
  • the resting members 5 can be formed in one piece with the upper wall 3 that can preferably be made from cast iron or stainless steel.
  • Part of the burner unit 7 can also be formed in one piece with the upper wall 3.
  • part of the burner unit 7 or the entire burner unit 7 can be made as a preassembled group ( Fig. 4 ) initially separate from and then connected to the upper wall 3, and possibly from a different material with respect to the material of the upper wall 3, in particular aluminium.
  • the burner unit(s) 7 comprise a burner plate 13 with a substantially annular shape that defines a plurality of gas outlet holes 14 and a base portion 15 that forms a gas distribution chamber 16 in communication with the gas feeding system 30 and with the gas outlet holes 14, as well as an air distribution chamber 17 separate from the gas distribution chamber 16 and in communication with the ventilation duct 11 and with one or more air openings 36 separate and spaced from the gas outlet openings 14.
  • the gas distribution chamber 16 has an annular shape delimited from above by the burner plate 13 with the gas outlet holes 14, at the side by an outer circumferential wall 37 equipped with a side opening 38 for connecting with the gas feeding system 30 and by an inner tubular wall 39, as well as from below by a bottom wall 40 opposite the burner plate 13.
  • the air distribution chamber 17 can be formed inside the gas distribution chamber 16 and, preferably, coaxial with the latter.
  • the air distribution chamber 17 is delimited from above by an air diffuser 41 that at least partially defines the air openings 36, at the side by the tubular wall 39 and from below by the bottom wall 40 opposite the air openings 36.
  • the bottom wall 40 forms one or more holes 42 for the entry of the secondary air into the air distribution chamber 17.
  • the air diffuser 41 has an upper portion 43 that, together with the burner plate 13, defines the aforementioned air openings 36, as well as a positioning stem 44 that projects from the upper portion 43 in the air distribution chamber 17 and that is received through shape coupling in a diffuser seat 45 formed in the bottom wall 40.
  • the positioning stem 44 and the diffuser seat 45 embody a sliding coupling along a single axis 46 through mutual insertion, preferably along an axis 46 that is concentric and, preferably substantially coaxial with axes of symmetry of the air and gas distribution chambers 17, 16.
  • the diffuser seat 45 forms a hole suitable for receiving a free end of the positioning stem 44, but allowing its extraction for easy cleaning or maintenance of the burner unit.
  • the air diffuser 41 is mushroom shaped and the upper portion 43 has a lower surface 47 facing towards the inside of the air distribution chamber 17 and that rests on a radially inner edge of the burner plate 13 so as to define, together with the latter, the aforementioned air openings 36.
  • the lower surface 47 of the air diffuser 41 is inclined so as to direct the secondary air flow radially outwards and upwards (in other words towards the support plane 6) so as to meet the flames at a certain distance from the gas outlet holes 14.
  • the burner plate 13 forms an annular projection 48 or a projection formed by sections extended along a circle between the gas outlet holes 14 and the air openings 36, so as to deviate the secondary air flow (downstream of the air openings 36) further upwards in the area of the flame.
  • At least one burner unit 7 comprises a rest reducer 49, for example a cross-shaped frame, for example made from cast iron or stainless steel, able to be positioned above the burner plate 13 so as to make a support plane for small pans, for example with diameters of less than 120 mm.
  • a rest reducer 49 is advantageously connected with the upper portion 43 of the air diffuser 41. In this way, a removal of the rest reducer 49 from the burner unit 7 makes the burner unit unusable, thus ensuring a correct and complete assembly (and the presence of the rest reducer) of the cook top in operative conditions.
  • the upper portion 43 has a hole 51 to receive a connection screw and the positioning stem 44 has an open tubular portion 50 to facilitate access to the screw through a screwdriver.
  • the gas feeding system 30 of the cook top 1 comprises a main duct 31 for feeding gas that can be connected with an external combustible gas source.
  • One or more partial ducts 32 connect the main duct 31 with each of the burner units 7 and an adjustment valve 33 associated with the partial duct 32 allows adjustment, preferably continuous, of the passage of gas through the partial duct 32 between a closed position and a maximum open position.
  • the partial duct 32 there can be air supply means configured so that, during operation, the flow of gas 34 in the partial duct draws a first volume of primary comburent air 35.
  • the air supply means for example comprise a venturi tube device 52 with a passage for the gas having a portion with throttled section and one or more passages for the primary air 35 that open out close to the portion with throttled section, so that the gas acts as a driving fluid to take the volume of primary air into the partial gas flow 34.
  • the forced suction group 9 is advantageously configured to suck up the secondary air 10 from a different area than the area of the suction of the primary air.
  • a control unit 53 controls the forced suction group 9 in response to an actuation of the adjustment valve 33, so as to activate the forced flow of secondary air at the same time as gas is fed to the burner unit 7.
  • the domestic gas cook top 1 has numerous advantages. Thanks to the configuration of the air diffuser and to its positioning through shape connection on the bottom of the burner unit, the flow of secondary air is distributed homogeneously and conveyed precisely and reliably to the flame. In this way it is ensured that there is high flame stability even in the case of great reductions of the height of the space 8 between the visible surface 4 and the bottom of the pan.
  • the high flame stability in turn contributes to more complete combustion, as well as a reduction in CO and CO 2 emissions for the same thermal power of the burner unit.

Landscapes

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

Claims (12)

  1. Unité de brûleur (7) pour une table de cuisson (1) au gaz, ladite unité de brûleur (7) comprenant :
    - une chambre de distribution de gaz (16) pouvant être raccordée à un système d'alimentation en gaz (30) pour la table de cuisson (1), ladite chambre de distribution de gaz (16) étant couverte d'une plaque de brûleur (13) qui définit des trous de sortie de gaz (14),
    - une chambre de distribution d'air (17) séparée de la chambre de distribution de gaz (16) et pouvant être raccordée à un groupe de ventilation forcée (11) de la table de cuisson (1), la chambre de distribution d'air (17) étant couverte d'un diffuseur d'air (41) qui définit au moins partiellement une ou plusieurs ouvertures de sortie d'air (36) espacées des ouvertures de sortie de gaz (14),
    dans laquelle le diffuseur d'air (41) est en forme de champignon et comprend une portion supérieure (43) qui définit au moins partiellement les ouvertures de sortie d'air (36) et une tige de positionnement (44) faisant saillie de la portion supérieure (43) dans la chambre de distribution d'air (17) et qui est reçue par accouplement de forme dans un siège de diffuseur (45) formé dans une paroi basse (40) de la chambre de distribution d'air (17) opposée aux ouvertures de sortie d'air (36),
    caractérisée en ce que la portion supérieure (43) dudit diffuseur d'air (41) a une surface inférieure (47) en regard vers l'intérieur de la chambre de distribution d'air (17) et appuyant sur un bord radialement intérieur de la plaque de brûleur (13) de façon à définir conjointement les ouvertures d'air (36) dans une région radialement plus près d'un axe (46) de la tige (44) par rapport aux trous de sortie de gaz (14),
    et en ce que ladite surface inférieure (47) du diffuseur d'air (41) est inclinée de façon à diriger un flux d'air secondaire provenant du groupe de ventilation forcée radialement vers l'extérieur et vers le haut à distance de l'unité de brûleur (7) de façon à rencontrer les flammes à une certaine distance des trous de sortie de gaz (14).
  2. Unité de brûleur (7) selon la revendication 1, dans laquelle la chambre de distribution de gaz (16) a une forme annulaire définie par ladite plaque de brûleur (13), par une paroi circonférentielle extérieure (37) équipée d'une ouverture de côté (38) pour se raccorder au système d'alimentation en gaz (30), par une paroi tubulaire intérieure (39), ainsi que par une paroi basse (40) opposée à la plaque de brûleur (13),
    dans laquelle la chambre de distribution d'air (17) est formée à l'intérieur de la chambre de distribution de gaz (16) et est définie par ledit diffuseur d'air (41), par la paroi tubulaire (39) et par la paroi basse (40) opposée aux ouvertures d'air (36), dans laquelle ladite paroi basse (40) forme un ou plusieurs trous (42) pour faire communiquer la chambre de distribution d'air (17) avec le groupe de ventilation forcée (11).
  3. Unité de brûleur (7) selon l'une quelconque des revendications précédentes, dans laquelle ladite tige de positionnement (44) et le siège de diffuseur (45) réalisent un accouplement coulissant selon un axe unique (46) par insertion mutuelle.
  4. Unité de brûleur (7) selon la revendication précédente, dans laquelle ledit axe (46) est concentrique avec les chambres de distribution d'air et de gaz (17, 16).
  5. Unité de brûleur (7) selon l'une quelconque des revendications précédentes, dans laquelle le siège de diffuseur (45) forme un trou approprié pour recevoir de façon extractive une extrémité libre de la tige de positionnement (44).
  6. Unité de brûleur (7) selon l'une quelconque des revendications précédentes, comprenant une saillie annulaire (48) entre les trous de sortie de gaz (14) et les ouvertures d'air (36).
  7. Unité de brûleur (7) selon l'une quelconque des revendications précédentes, comprenant un réducteur d'appui (49) capable d'être positionné au-dessus de la plaque de brûleur (13) de façon à réaliser un plan de support pour des petites casseroles ou poêles, ledit réducteur d'appui (49) étant raccordé à la portion supérieure (43) du diffuseur d'air (41).
  8. Unité de brûleur (7) selon la revendication précédente, dans laquelle la portion supérieure (43) du diffuseur d'air (41) forme un trou (51) qui reçoit une vis de raccordement et la tige de positionnement (44) forme une portion tubulaire ouverte (50) pour faciliter l'accès à la vis.
  9. Unité de brûleur (7) selon l'une quelconque des revendications précédentes, dans laquelle l'unité de brûleur (7) entière est réalisée sous forme de groupe pré-assemblé qui peut être raccordé à une paroi supérieure (3) de la table de cuisson (1).
  10. Unité de brûleur (7) selon l'une quelconque des revendications précédentes, dans laquelle l'unité de brûleur (7) est réalisée sensiblement à partir d'aluminium.
  11. Table de cuisson (1) à gaz domestique comprenant :
    - une ou plusieurs unités de brûleur (7) selon l'une quelconque des revendications précédentes,
    - un système d'alimentation en gaz (30, 31, 32, 33) configuré pour alimenter ladite unité de brûleur (7) en un flux de gaz (34),
    - un groupe de ventilation forcée (9, 11) adapté pour aspirer un volume d'air secondaire (10) et alimenter ladite unité de brûleur (7) en ledit flux d'air secondaire (10).
  12. Table de cuisson (1) à gaz domestique selon la revendication 11, comprenant :
    - une structure de support et de confinement (2) dotée d'une paroi supérieure (3) ayant une surface visible (4),
    - un ou plusieurs organes d'appui (5) agencés au niveau de ladite paroi supérieure (3) et définissant un plan de support (6) pour les récipients à chauffer, ledit plan de support (6) étant sur le côté de la surface visible (4) de la paroi supérieure (3),
    dans laquelle lesdites une ou plusieurs unités de brûleur (7) sont agencées au niveau de ladite paroi supérieure (3) et configurées de façon à générer des flammes dans l'espace (8) entre ladite surface visible (4) et ledit plan de support (6).
EP11160680.2A 2011-03-31 2011-03-31 Brûleur à gaz et table de cuisson Active EP2505917B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES11160680.2T ES2694766T3 (es) 2011-03-31 2011-03-31 Unidad de quemador y placa de cocción de gas
TR2018/16544T TR201816544T4 (tr) 2011-03-31 2011-03-31 Gaz beki ünitesi ve set üstü ocak.
EP11160680.2A EP2505917B1 (fr) 2011-03-31 2011-03-31 Brûleur à gaz et table de cuisson

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11160680.2A EP2505917B1 (fr) 2011-03-31 2011-03-31 Brûleur à gaz et table de cuisson

Publications (2)

Publication Number Publication Date
EP2505917A1 EP2505917A1 (fr) 2012-10-03
EP2505917B1 true EP2505917B1 (fr) 2018-08-08

Family

ID=44773198

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11160680.2A Active EP2505917B1 (fr) 2011-03-31 2011-03-31 Brûleur à gaz et table de cuisson

Country Status (3)

Country Link
EP (1) EP2505917B1 (fr)
ES (1) ES2694766T3 (fr)
TR (1) TR201816544T4 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9206985B2 (en) * 2012-10-26 2015-12-08 Sears Brand, L.L.C. Integrated cooktop assembly
ES2685870T3 (es) * 2014-04-04 2018-10-11 Smeg S.P.A. Quemador de gas para una placa de cocción y placa de cocción que comprende dicho quemador de gas
CN106016435A (zh) * 2016-05-11 2016-10-12 福安市大金龙电机有限公司 一种燃油取暖器燃烧室结构
CN108426244B (zh) * 2018-04-24 2023-12-26 广州市东霸节能科技有限公司 一种预混式炉头

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2298307A (en) * 1940-03-20 1942-10-13 Gas Products Corp Top structure for gaseous fuel cook stoves
US2521936A (en) * 1945-02-16 1950-09-12 Ervin H Mueller Gas burner with utensil support
US3260300A (en) * 1960-04-29 1966-07-12 Whirlpool Co Fluid fuel burner assembly
FR2618881B2 (fr) * 1986-02-13 1989-12-15 Madec Mater France Bruleur perfectionne pour combustibles gazeux a systemes d'allumage et de securite incorpores
FR2669401B1 (fr) * 1990-11-21 1995-01-06 Gaz De France Bruleur a gaz perfectionne pour cuisiniere, table de cuisson ou analogue.
EP2072901B1 (fr) 2007-12-17 2019-06-05 Candy S.p.A. Table de cuisson domestique à gaz

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ES2694766T3 (es) 2018-12-27
TR201816544T4 (tr) 2018-11-21
EP2505917A1 (fr) 2012-10-03

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