EP0797048B1 - Gas burner for kitchen appliances - Google Patents

Gas burner for kitchen appliances Download PDF

Info

Publication number
EP0797048B1
EP0797048B1 EP96109934A EP96109934A EP0797048B1 EP 0797048 B1 EP0797048 B1 EP 0797048B1 EP 96109934 A EP96109934 A EP 96109934A EP 96109934 A EP96109934 A EP 96109934A EP 0797048 B1 EP0797048 B1 EP 0797048B1
Authority
EP
European Patent Office
Prior art keywords
chamber
burner according
burner
crown
flame
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
EP96109934A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0797048A1 (en
Inventor
Giuseppe Saleri
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.)
Sabaf SpA
Original Assignee
Sabaf 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26142009&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0797048(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sabaf SpA filed Critical Sabaf SpA
Priority to DE69604153T priority Critical patent/DE69604153T2/de
Priority to EP96109934A priority patent/EP0797048B1/en
Priority to AT96109934T priority patent/ATE184384T1/de
Priority to SI9630091T priority patent/SI0797048T1/xx
Priority to DE0797048T priority patent/DE797048T1/de
Priority to ES96109934T priority patent/ES2107401T3/es
Priority to TR97/00179A priority patent/TR199700179A1/xx
Priority to YU10097A priority patent/YU49044B/sh
Priority to PL97319027A priority patent/PL183105B1/pl
Priority to KR1019970009334A priority patent/KR100453121B1/ko
Publication of EP0797048A1 publication Critical patent/EP0797048A1/en
Publication of EP0797048B1 publication Critical patent/EP0797048B1/en
Application granted granted Critical
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
    • F23D14/02—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
    • F23D17/00—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel
    • 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 a burner for kitchen cooking appliances of a type provided with three flame-crowns.
  • Gas burners for cooking appliances providing two or three flame-crowns are known in the art.
  • three flame-crown burners are known which have one central flame-crown and two circumferential crowns, one directed towards the centre of the burner and the other towards the outside.
  • This type of burner is particularly advantageous since it heats the base of the pot more uniformly.
  • the British Application No. GB-A-2233444 in the name of Lee, describes a burner comprising a vertical combined gas-supply and support pipe on which is mounted a three-crown head.
  • the central crown is coaxial with the vertical supply pipe and communicates with it; three branching ducts extend from this supply pipe to take the mixture of primary air and gas to a circular flame-separator crown, into which two circumferential flame-crowns are cut.
  • the secondary air is taken from above the hob for all three crowns.
  • the vertical shape of this embodiment makes it not suitable for use on "built-in" kitchen units where the vertical height of the burners must be reduced as much as possible. Furthermore, the internal circumferential crown has a reduced number of flame jets as a result of interference and combustion problems found with this type of burner.
  • the EP-A-0534301 in the name of Merloni, describes a burner with a two-crown head. Similar to what is described in German Patent No. 3123751 in the name of the Applicant, in this burner both the primary and secondary air are taken from above the hob and the mixture of primary air and gas is taken to the flame crown by a so-called horizontal Venturi duct.
  • the two crowns are cut externally and internally into a circular flame separator whose interior space is divided by separator elements into a plurality of sectors to which the primary air-gas mixture is supplied by a plurality of arms.
  • This embodiment has not solved the problem of the earlier art in that, while the horizontal Venturi reduces the height of the burner, there are only two circumferential flame-crowns, of which the internal has a very small number of flame jets.
  • the aim of the present invention is to overcome the above problems and produce a three-flame burner of reduced height, which is simple and inexpensive to produce and install, which produces a flame that is substantially free of turbulence and interference and which gives easy access to the gas jet to allow replacement.
  • the chamber which produces the Venturi effect has two or more holes or slits in its upper wall to allow the primary air-gas mixture to enter the central crown; such holes or slits are located between the beginning of the diverging length of the bottom wall, where the Venturi effect is off or is substantially reduced, and the end of the flat length of the top wall of the chamber.
  • the area of the slits is between 2% and 10% of the area of the upper wall.
  • the angle between the two surfaces on the lower wall of the chamber is within the range from 5° to 15°.
  • the sidewalls of the Venturi-effect chamber are flared.
  • the central flame crown comprises a plurality of pilot flames obtained from cuts connected to the upper cavity of the central body and with a plurality of main flames obtained from holes located on said flared sidewalls of the Venturi chamber.
  • Said holes are preferably inclined with respect to the burner vertical axis with an angle within the range from 20 to 40 degrees, and preferably of about 32 degrees.
  • the burner according to the invention has numerous advantages over the state of the art.
  • the burner has three flame-crowns distributed substantially uniformly, thus giving effectively uniform heating of the pot.
  • the flames are essentially free of turbulence or interference.
  • the burner has a low profile and can be installed on "built-in" cooking hobs.
  • the burner 1 As visible in figures 1 (that is a section along plane A-A of fig. 3) and 6, the burner 1 according to the invention comprises a base 2 to which is attached the gas supply pipe 3 and a seat 4 for the jet 5 (fig.6).
  • the base 2 is provided with a plurality of flanges 11 projecting radially to attach it to the hob.
  • the base 2 houses a cylindrical element 6; within this element 6 is an internal conduit 8 integral with or assembled onto the same element 6.
  • the conduit 8 is integral with the element 6 and forms with it and with the base 2 a mixing chamber 9 for the mixing of the gas from supply 3 and of the primary air coming from above the hob 13 (fig. 6) through the openings 14.
  • Such openings 14 are defined by the flange 11, by corresponding flanges 12 on the cylindrical element 6 and by vertical fins 15 on the underside of the flange 12.
  • cylindrical element 6 Above the cylindrical element 6 is a head 16 in which are cut the three crowns 17, 18 and 19, and which shall be better described with reference to figs. 2 and 3.
  • the head 16 comprises a central portion 20 on which are provided upper cavity 33 and the grooves of the central flame crown 17.
  • the central portion 20 is connected by the arms 21 to a circular element 22, with a substantially U-shaped section, on which are the circumferential flame crowns 18 and 19.
  • these flame crowns (comprising a plurality of grooves) are shown only on part of the circular element 22.
  • the arms 21 are hollow and have no lower wall, allowing the primary air/gas mixture to enter the circular element 22; the lower boundary of the arms 21 is comprised by the plates 12 on a peripheral part of which the head 16 rests.
  • the lower face of the central portion 20 presents a cavity defined by the wall or flat face 23 and the walls 24 which are flared.
  • This cavity houses the upper part 25 of the cylindrical element 6 which is of such height as to leave the upper face 26 of the said part 25 spaced from the flat face 23 of the head 16, when the burner is assembled, by a distance preferably between 1.5 and 3.5 mm.
  • Venturi effect chamber 27 is substantially horizontal and defined by face 23 of the central portion 20 of head 16 and face 26 of cylindrical element 6. Face 23 is effectively the upper wall of chamber 27 and face 26 is its lower wall.
  • Face 26 is provided with a circular bevel 26a which lies at an angle to the plane of the face 26, such plane is substantially parallel to the above face 23.
  • the angle ⁇ between the two planes is preferably between 5 and 15 degrees.
  • the Venturi effect ends or is severely reduced near the boundary between the face 26 and the circular bevel 26a.
  • Walls 24 are flared (see fig.2) to guide and conduct to arms 21 without turbulence the part of the air/gas mixture flow that strikes said walls on its exit from the Venturi chamber 27.
  • the flat wall 23 is provided with two or more slits 28, preferably four slits, one for each wall 24, that connect Venturi chamber 27 with cavity 33 of central portion 20.
  • the slits 28 are located in proximity to the zone where the Venturi effect ends or is substantially reduced, and/or downstream of that zone with respect to the gas flow.
  • the holes or slits are therefore located in the face 23 in correspondence to the boundary of face 26 defined by the bevel 26a, preferably downstream thereof with respect to the gas flow, and more preferably (as in the embodiment shown) corresponding to the bevel 26a.
  • the holes or slits 28 are preferably of such size that their total area is from 2% to 10% of the area of face 23, where the said area is defined as the total area of face 23 including the area of the said hole bounded by the line H in fig.2.
  • the burner has two covers 29 and 30 to cover the central portion 20 and the circular element 22 of the head 16, part 20 being raised above the element 22.
  • FIG. 9-13 show a further embodiment of the invention in which the central flame crown is obtained on different levels.
  • the remaining features of the burner, i.e. Venturi chamber, slits etc., are the same as in above embodiment and are referred to with identical reference numbers.
  • central flame ring 17a comprises a first plurality of flames 34 (consisting of grooves or cuts) that are connected to cavity 33 of central portion 20; in other words, flames 34 are obtained on the edge of cavity 33 of central portion 20 by means of grooves that are defined above by a cover 30a.
  • flames 34 are pilot flames and main flames 35 are obtained from holes provided on flared walls 24 of the Venturi chamber.
  • Holes or flames 35 are angled to the burner vertical axis with an angle ⁇ within the range from 20 to 40 degrees and preferably with an angle ⁇ of about 32 degrees.
  • the cover 30a is centered on the upper edge of central portion 20 by means of projecting portions 36 provided on said edge, and it projects beyond it to cover flames 34.
  • the flame crowns are defined in such a way that the main flames, which are recognizable in the drawings because of the large grooves, are offset with respect to those of the next crown, to avoid interference with them.
  • the primary air/gas mixture flows along the wall 24 and the arms 21 of the head 16 and in part flows to the crown 17 through the plurality of through holes, or slits, 28 in face 23 of central portion 20 of head 16.
  • the primary and secondary air are taken from above the hob.
  • a means of supplying secondary air to the burner also from below the level of the hob. It has been found that the problem of instability in the flame when lighting the burner from cold can be eliminated in this way.
  • FIG.8 The preferred means of supplying secondary air from below the hob is shown in fig.8.
  • This figure shows a base 2a provided with a conduit 3 to supply gas and a seat 4 for the gas jet. Similar to base 2 shown in fig.1, also base 2a is provided with arms 11a to attach it to the hob 13.
  • arms 11a in base 2a are joined to each other to form the flange 32, in which are cut slits 31 for the passage of air from below the hob to above the hob.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Feeding And Controlling Fuel (AREA)
EP96109934A 1996-03-19 1996-06-20 Gas burner for kitchen appliances Expired - Lifetime EP0797048B1 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
DE69604153T DE69604153T2 (de) 1996-03-19 1996-06-20 Gasbrenner für Küchengeräte
EP96109934A EP0797048B1 (en) 1996-03-19 1996-06-20 Gas burner for kitchen appliances
AT96109934T ATE184384T1 (de) 1996-03-19 1996-06-20 Gasbrenner für küchengeräte
SI9630091T SI0797048T1 (en) 1996-03-19 1996-06-20 Gas burner for kitchen appliances
DE0797048T DE797048T1 (de) 1996-03-19 1996-06-20 Gasbrenner für Küchengeräte
ES96109934T ES2107401T3 (es) 1996-03-19 1996-06-20 Quemador de gas para dispositivos de cocina.
TR97/00179A TR199700179A1 (xx) 1996-03-19 1997-03-10 Mutfak tesisatlar� i�in bir gaz oca��.
YU10097A YU49044B (sh) 1996-03-19 1997-03-17 Gasni gorionik za kuhinjske uređaje
PL97319027A PL183105B1 (pl) 1996-03-19 1997-03-18 Palnik gazowy do urządzeń kuchennych
KR1019970009334A KR100453121B1 (ko) 1996-03-19 1997-03-19 주방용버너

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP96830125 1996-03-19
EP96830125 1996-03-19
EP96109934A EP0797048B1 (en) 1996-03-19 1996-06-20 Gas burner for kitchen appliances

Publications (2)

Publication Number Publication Date
EP0797048A1 EP0797048A1 (en) 1997-09-24
EP0797048B1 true EP0797048B1 (en) 1999-09-08

Family

ID=26142009

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96109934A Expired - Lifetime EP0797048B1 (en) 1996-03-19 1996-06-20 Gas burner for kitchen appliances

Country Status (9)

Country Link
EP (1) EP0797048B1 (xx)
KR (1) KR100453121B1 (xx)
AT (1) ATE184384T1 (xx)
DE (2) DE69604153T2 (xx)
ES (1) ES2107401T3 (xx)
PL (1) PL183105B1 (xx)
SI (1) SI0797048T1 (xx)
TR (1) TR199700179A1 (xx)
YU (1) YU49044B (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102230622A (zh) * 2011-06-21 2011-11-02 美的集团有限公司 一种用于燃气灶具的燃烧器
WO2011144630A2 (en) 2010-05-19 2011-11-24 Defendi Italy S.R.L. Gas burner with multiple flame rings
CN103256595A (zh) * 2013-05-16 2013-08-21 广东万和电气有限公司 用于燃气灶的燃烧器

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0903538A1 (en) * 1997-09-23 1999-03-24 SABAF S.p.A. Gas burner
IT1318126B1 (it) 2000-07-06 2003-07-23 Sabaf Spa Bruciatore con separatore interno
ITVE20010043A1 (it) * 2001-10-24 2003-04-24 Ohg Defendi S R L Bruciatore a gas a piu' settori di fiamma
ITMI20020315A1 (it) 2002-02-18 2003-08-18 Sabaf Spa Piano di cottura in vetro temprato o altro materiale termicamente degradabile
ITPS20030016A1 (it) * 2003-04-18 2004-10-19 So M I Press Societa Metalli I Niettati Spa Bruciatore per fornelli a gas, di tipo perfezionato.
ITUD20030137A1 (it) * 2003-06-23 2004-12-24 Sami Srl Bruciatore a tripla corona.
ES1056041Y (es) * 2003-11-11 2004-06-01 Fagor S Coop Quemador de gas de triple corona para placas de coccion.
PL206955B1 (pl) 2004-01-23 2010-10-29 Burner Systems Int Bsi Palnik gazowy dla urządzenia kuchennego
KR100678283B1 (ko) 2005-01-19 2007-02-02 동양매직 주식회사 가스 버너
ITVE20050003A1 (it) * 2005-01-20 2006-07-21 Ohg Defendi S R L Bruciatore a gas, in particolare per apparecchiature di cottura domestiche.
KR100730576B1 (ko) 2005-08-24 2007-06-21 공재철 휴대용 가스렌지
PT2359061T (pt) 2008-12-12 2018-11-29 Sabaf Spa Queimador a gás para fogões domésticos
EP2402654B1 (en) * 2010-06-23 2013-07-31 Electrolux Home Products Corporation N.V. Gas stove
CN102062400A (zh) * 2011-01-25 2011-05-18 叶鸿煦 一种用于蒸煎鱼的节能燃烧器
CN202494111U (zh) * 2012-02-16 2012-10-17 梁锦洪 燃气灶用的燃烧器
WO2016142872A1 (en) * 2015-03-10 2016-09-15 Defendi Italy S.R.L. Improved gas bruner

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2233444A (en) * 1939-09-19 1941-03-04 Hubert O Woody Shearing machine
DE3123751C3 (de) * 1981-06-15 1998-01-29 Sabaf Spa Gasbrenner für eine Kochplatte
FR2642147B1 (fr) * 1989-01-20 1991-05-03 Sourdillon Airindex Sa Agencement de bruleur a gaz du type extra-plat
GB2233444B (en) * 1989-08-16 1992-08-26 Lee Cheng San Improvements in and relating to gas cooker hobs
US5133334A (en) * 1989-12-12 1992-07-28 Robertshaw Controls Company Burner construction and method of making the same
IT1250838B (it) * 1991-09-26 1995-04-21 Merloni Elettrodomestici Spa Bruciatore di gas.
IT1258754B (it) * 1992-01-13 1996-02-27 Smeg Spa Bruciatore perfezionato per fornelli di cottura a gas a tre fiamme concentriche
KR100187029B1 (ko) * 1995-12-28 1999-03-20 배순훈 2중 벤츄리 버너

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011144630A2 (en) 2010-05-19 2011-11-24 Defendi Italy S.R.L. Gas burner with multiple flame rings
CN102230622A (zh) * 2011-06-21 2011-11-02 美的集团有限公司 一种用于燃气灶具的燃烧器
CN103256595A (zh) * 2013-05-16 2013-08-21 广东万和电气有限公司 用于燃气灶的燃烧器

Also Published As

Publication number Publication date
YU10097A (sh) 1999-09-27
DE69604153T2 (de) 2000-05-25
YU49044B (sh) 2003-07-07
PL319027A1 (en) 1997-09-29
DE69604153D1 (de) 1999-10-14
SI0797048T1 (en) 1999-12-31
TR199700179A1 (xx) 1997-10-21
DE797048T1 (de) 1998-03-12
ATE184384T1 (de) 1999-09-15
ES2107401T1 (es) 1997-12-01
EP0797048A1 (en) 1997-09-24
KR970066277A (ko) 1997-10-13
ES2107401T3 (es) 2000-02-01
KR100453121B1 (ko) 2004-12-23
PL183105B1 (pl) 2002-05-31

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