EP3286499A1 - Brûleur à gaz optimisé pour appareils de cuisson - Google Patents

Brûleur à gaz optimisé pour appareils de cuisson

Info

Publication number
EP3286499A1
EP3286499A1 EP16727547.8A EP16727547A EP3286499A1 EP 3286499 A1 EP3286499 A1 EP 3286499A1 EP 16727547 A EP16727547 A EP 16727547A EP 3286499 A1 EP3286499 A1 EP 3286499A1
Authority
EP
European Patent Office
Prior art keywords
support structure
burner
cavity
venturi conduit
injector
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.)
Granted
Application number
EP16727547.8A
Other languages
German (de)
English (en)
Other versions
EP3286499B1 (fr
Inventor
Cristian BIAGIOLI
Luca BRECCIA
Werner NOETH
Marco SBAFFI
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.)
Defendi Italy SRL
Original Assignee
Defendi Italy SRL
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
Priority claimed from ITVE2015A000018A external-priority patent/ITVE20150018A1/it
Priority claimed from ITUB2015A003850A external-priority patent/ITUB20153850A1/it
Application filed by Defendi Italy SRL filed Critical Defendi Italy SRL
Priority to PL16727547T priority Critical patent/PL3286499T3/pl
Publication of EP3286499A1 publication Critical patent/EP3286499A1/fr
Application granted granted Critical
Publication of EP3286499B1 publication Critical patent/EP3286499B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/06—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with radial outlets at the burner head
    • F23D14/065—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with radial outlets at the burner head with injector axis inclined to the burner head axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/62—Mixing devices; Mixing tubes
    • F23D14/64—Mixing devices; Mixing tubes with injectors
    • 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
    • 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 an improved gas burner for cooking appliances.
  • Gas burners are known with one or more rings of main flames, such as that described in U S 2001 /001 0897 , to be instal led on cooking hobs in general; these generally comprise a cup-shaped injector holder, at which the burner is installed on the cooking hob, a burner body, on which one or more venturi conduits are provided for mixing the gas with primary air to form the combustion m ixture, a f l a m e d iv i de r w ith o n e o r m o ch a m be rs fo r distributing the combustion mixture to generate the flame rings, and with upper closure covers for the distribution chambers.
  • the market offers a vast range of burners with one or more main flame rings, with each user making individual choices based on certain burner aspects rather than others, according to requirements.
  • burners have also been proposed in which the axial position of the venturi conduit relative to the injector can be adjusted. These burners have however proved extremely complex and bulky and require the upper sheet metal of the cooking hob to be removed for their adjustment.
  • FR 2692014 describes a pipe burner, in which the injector is located a large distance from the burner head; this is not suitable for installation on a cooking hob and moreover is rather com pl icated to assem ble and hence costly, given that it comprises a large number of components, and in particular com prises a flame d ivider head , a curved first conduit, a second conduit internally housing a venturi conduit, two flanges and a U-shaped flange for supporting the injector.
  • an object of the invention is to provide a gas burner which can be instal led in a cooking hob, and in which the position of the venturi condu it or of each venturi conduit can be adjusted relative to the injector, without having to disassemble the cooking hob.
  • Another object of the invention is to be able to make this adjustment easily and quickly.
  • Another object of the invention is to produce a burner in a very simple form and at low cost.
  • Figure 1 is an exploded perspective view showing a first em bodiment of a burner according to the invention
  • Figure 2 is a vertical diametrical section therethrough
  • Figure 3 is a perspective view showi ng the cup-shaped support for the injector holder structure
  • Figure 4 is a plan view thereof
  • Figure 5 is a vertical section through a second embodiment of the burner according to the invention.
  • Figure 6 is an exploded perspective view of its injector holder structure
  • Figure 7 is an exploded perspective view of a third embodiment of the lower support structure of the burner of Figure 1
  • Figure 8 is an exploded perspective view showing a fourth embodiment of part of the structure of Figure 7.
  • FIGS 1 -6 show a particular multi-ring burner 2 to be applied to the upper sheet metal 3 of a traditional cooking hob, preferably of built-in type, in a position corresponding to an aperture provided therein.
  • the burner 2 has an inner circular distribution chamber 4 and an outer annular distribution chamber 6, to which mixtures of gas and primary air arrive originating from two separate venturi conduits 8, 8' fed with gas delivered by respective injectors 1 0, 1 0'.
  • the burner type, the number of flame rings, the number of injectors, and an entire series of characteristics recognizable in the burner illustrated in the drawings by way of example could also be different, in the sense that, that which characterises the burner according to the invention is the manner of adjusting at least one venturi conduit 8, 8' relative to the injector 1 0, 1 0' wh ich l ies to the front thereof.
  • the venturi conduit 8 is housed within a lower support structure 1 1 of the burner 2, and preferably within its lower cup 12.
  • venturi conduit 8 is disposed approximately horizontal within the lower cup 12 and opens at its upstream end into a cavity 14, which is defined in said cup 12, is open lowerly, is closed upperly, and presents in a curved lateral wall thereof 16 an outer connector 1 8 for the gas and inner threaded seat for the injector 10.
  • venturi conduit 8 is faced at its upstream end by the injector 10, it extends horizontally within the lower cup 12 of the support structure 1 1 and opens at its downstream end into an arched cavity 20, also provided in the lower cup 12, which is open upperly and is intended to feed at least one curved distribution chamber provided in at least one flame divider overlying said cup 12.
  • the venturi conduit 8 is obtained from a piece of metal or non-metal tube which is externally cylindrical and internally shaped such as to define a first downwardly converging portion close to the injector 1 0, a second portion of constant cross-section, and a third downwardly diverging portion.
  • the venturi conduit 8 is inserted into and housed in a seat 9 provided in the lower cup 1 2.
  • the seat 9 also extends horizontally with in the lower cup 1 2 to connect together the cavity 1 4 and the arched cavity 20.
  • the seat 9 is a cy l i nd ri ca l th roug h seat and , preferably, the venturi conduit 8 has a length greater than the length of said seat 9, such as to project therefrom with both its ends into the two cavities 14 and 20.
  • the lower support structure 1 1 can be formed from two parts, i.e. from the lower cup 1 2 and from a cover element 1 3, which can be joined together either permanently by rivets or removably by screws.
  • the seat 9 can be defined lowerly by an elongated cavity provided i n the lower cup 1 2 , and upperly by a complementary cavity provided in the cover element 13.
  • the venturi conduit 8 has an outer diameter slightly less than the inner diameter of its seat 9, such as to be able to be easily displaced axially within it.
  • the seat 9 housing the venturi conduit 8 communicates with the space overlying the lower support structure 1 1 of the burner via an internal ly threaded cylindrical hole housing a grub screw 22 for locking the venturi conduit 8 in its seat 9.
  • the head of th is g ru b screw 22 is preferab ly p rovi ded with a hexagonal recess into which a traditional Allen key can be inserted for its operation from above through the aperture provided in the sheet metal 3, without having to remove the burner 2 from the cooking hob to which it is applied.
  • the arched cavity 20 into which the downstream end of the venturi condu it 8 opens presents, in a position facing said venturi conduit 8, an aperture which can be closed by a plug 24 applicable from the outside. Its purpose is to enable the venturi conduit 8 to be inserted into its seat through said aperture during burner assembly, and also to enable its possible substitution, should it be necessary to modify its characteristics and performance.
  • the plug 24 is applied to the lateral wall 16 of the cavity 14, and is provided with a threaded axial cavity fo r t h e i nj e cto r 1 0 a n d w i t h a n ext e rn a l co n n e ct o r fo r t h e g a s .
  • the plug 24 is retained in its seat by an elastic fork 26.
  • the operation is extremely simple and can be carried out even with the burner installed on the cooking hob, and at the very most after removing that burner part defining the outer annular distribution chamber 6, and which rests on the lower support structure 1 1 .
  • the hexagonal cavity provided in the head of the locking grub screw 22 becomes accessible, so that it can be unscrewed, for example by a suitable Allen key.
  • the venturi conduit 8 After the grub screw 22 has been slackened, by which the venturi conduit 8 is able to be moved within its seat, it can be displaced along it such that its upstream end can be positioned at the correct distance from the injector 1 0. This operation can be facilitated not only by the mobility of the venturi conduit 8 within its seat, but also by the presence of both ends projecting into the respective cavities 14 and 20, and easily accessible from above through the opening made in the upper sheet metal of the cooking hob.
  • the burner according to the invention could have two Venturis 8, 8' adjustable within their respective seats 9.
  • a first seat 9 connects, as stated, an inlet cavity 14 of the lower support 1 1 to an outlet cavity 20 which is in flu idic com m unication with the outer annular distribution chamber 6; whereas the other seat 9' connects an inlet cavity 14' of the lower support 1 1 to an outlet cavity 20' which is in fluidic communication with the inner central distribution chamber 4 (see Figure 4).
  • the lower support structure 1 1 consists of a single piece, and presents a shape which is irregular but preferably with it outer edge inscribable within a circumference.
  • the lower support structure 1 1 is of cup shape and comprises:
  • a first portion provided with a first cavity which is divided by a vertical baffle 34 into two chambers 33, 35 which are provided on their outer wall 31 with two circular apertures 30, 32, - a second portion provided with a second cavity 37 situated in a position diametrically opposite the first cavity,
  • connection portion 39 which connects the two preceding portions together.
  • two parallel cylindrical conduits 36, 38 are provided within the lower support structure 1 1 , and are axially aligned with the two apertures 30, 32.
  • these two conduits 36, 38 can be easily formed by suitably boring through the lower support structure 1 1 from one side to the other.
  • An externally cylindrical respective tubular element 42, 44 internally shaped as a venturi (venturi condu it) is insertable into each of the two cylindrical conduits 36, 38, and has a convergent upstream portion followed by a cylindrical central portion, then by a divergent downstream portion.
  • each venturi conduit 42, 44 is suitably slightly less both than the inner diameter of the respective apertures 30, 32, and than the inner diameter than the corresponding cylindrical conduits 36, 38, both to enable each venturi conduit 42, 44 to be i nserted i nto the respective cylindrical conduit through the respective aperture 30, 32, and to enable it to move axially therein.
  • Each venturi condu it 42 , 44 can be locked with in the respective cylindrical conduit 36, 38 in the desired axial position, by means of a grub screw 46 provided through the inner lateral wall of each of the two chambers 33, 35 and operable from above the cooking hob on wh ich the burner is installed.
  • the length of each venturi conduit 42, 44 is greater than the length of the respective cyl indrical condu it 36, 38 in wh ich it is housed, so that it is able to project from both its ends.
  • An injector holder unit 52 can be inserted through the two circular apertures 30, 32 provided in the outer wall 31 to the cavity provided in the support structure 1 1 .
  • This unit consists of two roughly cylindrical parts 54, 56 joined together by a connecting cross-piece 58.
  • the injector holder unit can also be formed as two separate cylindrical parts 54, 56 insertable into the two ape rtu res 30 , 32 of the s u pport structu re 1 1 a nd f ixab l e to them by conventional systems.
  • each of these parts 54, 56 a threaded outer cylindrical cavity is provided for connecting a gas feed conduit, together with a threaded inner cylindrical cavity for connecting an injector 60, 62, which is coaxial with the venturi conduit 42, 44 housed in the respective cyl indrical conduit 36, 38 when the injector holder unit 52 is fixed to the support structure 1 1 .
  • the injector holder unit 52 is removably connected to the cup shaped structure 1 1 by a screw 64, which passes through the connection bar 58 and engages in the outer wall 31 of the cup structure 1 1 , after the two cylindrical parts 54, 56 of the i njector ho lder unit 52 have been inserted into the respective apertu res 30 , 32.
  • a screw 64 which passes through the connection bar 58 and engages in the outer wall 31 of the cup structure 1 1 , after the two cylindrical parts 54, 56 of the i njector ho lder unit 52 have been inserted into the respective apertu res 30 , 32.
  • both the two cylindrical pieces 54, 56, and the respective apertures 30, 32 have different diameters.
  • the two venturi conduits 42, 44 are firstly inserted into the corresponding cylindrical conduits 36, 38 of the support structure 1 1 , after which the injector holder unit 52 is applied to the burner body and is fixed to it by the screw 64.
  • the burner assembled in this manner is ready to be installed in the cooking hob.
  • the gas feed conduits are fixed to the injector holder unit 52, and the support structure 1 1 is fixed by screws to the sheet metal of the cooking hob.
  • the injector holder unit 58 is formed as a single piece with the support structure 1 1 .
  • the venturi conduits 42, 44 through the application apertures of the injector holder unit 58, and apertures have to be provided in the outer wall of the second cavity 37, which apertures, after insertion of the venturi conduits 42, 44, are closed by suitable threaded plugs, as already described with reference to Figure 1 . From the aforesaid it is apparent that the burner accord ing to the i nvention is particu larly advantageous com pared with traditional burners, in that:
  • the position of the venturi conduit/condu its can be easi ly and qu ickly adjusted, even with the burner installed on the cooking hob, and hence the burner can be adapted to different feed gas characteristics

Landscapes

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

Abstract

La présente invention concerne un brûleur à gaz optimisé pour appareils de cuisson, comprenant : - une structure de support inférieure en forme de cuvette (11, 12, 13), devant être appliquée dans une position correspondant à une ouverture ménagée dans la tôle (3) d'une plaque de cuisson, - au moins un injecteur (10, 10', 60, 62), d'axe sensiblement horizontal, appliqué à une paroi latérale (16, 31) d'une première cavité (14, 33, 35) prévue dans ladite structure de support (11,12), - au moins un conduit venturi sensiblement horizontal (8, 8', 42, 44) coaxial avec ledit injecteur (10, 10', 60, 62) et s'ouvrant au niveau de son extrémité avale dans une seconde cavité (20, 20', 37) qui est prévue dans ladite structure de support (11, 12, 13), qui est ouvert vers le haut, et communique de manière fluidique avec au moins une chambre de distribution (6) pour le mélange de combustion, pour générer au moins un anneau de flamme, caractérisé en ce que ledit conduit venturi (8, 8', 42, 44) est constitué d'un élément tubulaire séparé de ladite structure de support (11, 12, 13), et logé de manière à pouvoir subir un mouvement axial libre à l'intérieur d'un siège correspondant (9, 36, 38) prévu dans ladite structure de support (11, 12, 13) et est verrouillable dans la position axiale souhaitée par au moins un élément de verrouillage (28, 46) accessible depuis le haut de ladite structure de support (11, 12, 13) à travers ladite ouverture prévue dans la tôle (3) de la plaque de cuisson.
EP16727547.8A 2015-04-24 2016-04-21 Brûleur à gaz optimisé pour appareils de cuisson Active EP3286499B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL16727547T PL3286499T3 (pl) 2015-04-24 2016-04-21 Ulepszony palnik gazowy do urządzeń do gotowania

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITVE2015A000018A ITVE20150018A1 (it) 2015-04-24 2015-04-24 Bruciatore a gas perfezionato per apparecchi di cottura.
ITUB2015A003850A ITUB20153850A1 (it) 2015-04-24 2015-09-24 Bruciatore a gas con piu corone di fiamme per piani di cottura.
PCT/IB2016/052277 WO2016170499A1 (fr) 2015-04-24 2016-04-21 Brûleur à gaz optimisé pour appareils de cuisson

Publications (2)

Publication Number Publication Date
EP3286499A1 true EP3286499A1 (fr) 2018-02-28
EP3286499B1 EP3286499B1 (fr) 2019-05-01

Family

ID=56108677

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16727547.8A Active EP3286499B1 (fr) 2015-04-24 2016-04-21 Brûleur à gaz optimisé pour appareils de cuisson

Country Status (5)

Country Link
EP (1) EP3286499B1 (fr)
KR (1) KR102489742B1 (fr)
CN (1) CN107532796B (fr)
PL (1) PL3286499T3 (fr)
WO (1) WO2016170499A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TR201702673A2 (tr) * 2017-02-22 2018-09-21 Arcelik As Bi̇r bek grubu

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4373505A (en) * 1978-09-07 1983-02-15 Modern Home Products Corp. Adjustable venturi tube assembly for a gas barbecue grill
FR2505987B1 (fr) * 1981-05-12 1985-06-21 Europ Equip Menager Bruleur a gaz apte aux cuissons a basse temperature
FR2692024A1 (fr) * 1992-06-05 1993-12-10 Applic Electrotech Meca Brûleur à gaz, comportant des moyens d'alignement de l'injecteur et du mélangeur.
GB2322696B (en) * 1997-02-28 1999-01-06 Tri Square Ind Co Ltd Gas burner
FR2804496B1 (fr) * 2000-01-28 2002-07-19 Sourdillon Sa Bruleur a gaz a multiples couronnes de flammes
KR20030059900A (ko) * 2002-01-03 2003-07-12 엘지전자 주식회사 가스기기의 버너구조
CN2911440Y (zh) * 2006-05-12 2007-06-13 徐明强 新型燃气燃烧器
ITVE20070018A1 (it) * 2007-03-23 2008-09-24 Defendi Italy Srl Bruciatore perfezionato a gas per apparecchi di cottura.-
ITAN20120036A1 (it) * 2011-04-19 2012-10-20 Somipress Societa Metalli Iniett Ati S P A Fornello a gas con fiamma rivolta verso l'interno.

Also Published As

Publication number Publication date
CN107532796A (zh) 2018-01-02
PL3286499T3 (pl) 2019-10-31
KR20170139522A (ko) 2017-12-19
KR102489742B1 (ko) 2023-01-17
WO2016170499A1 (fr) 2016-10-27
EP3286499B1 (fr) 2019-05-01
CN107532796B (zh) 2019-09-20

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