EP2333418A1 - Four et dispositif de brûleur à gaz, notamment pour un four - Google Patents

Four et dispositif de brûleur à gaz, notamment pour un four Download PDF

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Publication number
EP2333418A1
EP2333418A1 EP09401049A EP09401049A EP2333418A1 EP 2333418 A1 EP2333418 A1 EP 2333418A1 EP 09401049 A EP09401049 A EP 09401049A EP 09401049 A EP09401049 A EP 09401049A EP 2333418 A1 EP2333418 A1 EP 2333418A1
Authority
EP
European Patent Office
Prior art keywords
holes
gas
burner device
gas burner
gas outlet
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.)
Ceased
Application number
EP09401049A
Other languages
German (de)
English (en)
Inventor
Matthias Schalück
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.)
Miele und Cie KG
Original Assignee
Miele und Cie KG
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 Miele und Cie KG filed Critical Miele und Cie KG
Priority to EP09401049A priority Critical patent/EP2333418A1/fr
Priority to US12/966,076 priority patent/US20110139142A1/en
Publication of EP2333418A1 publication Critical patent/EP2333418A1/fr
Ceased legal-status Critical Current

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Classifications

    • 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
    • F24C3/087—Arrangement or mounting of burners on ranges in baking ovens

Definitions

  • the present invention relates to a gas burner device for heating an interior of a domestic appliance and a household appliance equipped with such a gas burner device, and more particularly to an oven.
  • the gas burner device comprises at least one burner tube.
  • Known gas burners are used to heat the interior of a baking oven by the energy released during combustion of gas.
  • Known gas burners have tubular gas burner tubes, in which flame nozzles are provided, through which the gas to be burned emerges.
  • the EP 0 860 658 B1 discloses a gas-fired oven, wherein the gas burner tube has laterally guided flame nozzles.
  • Various methods are common for the production of the gas burner tubes and the introduction of the flame nozzles in the gas burner tubes.
  • a problem in the manufacture of burner tubes is the formation of holes with approximately elliptical cross-section at the bending radii of the burner tube. This results in an uneven flame distribution on the circumference of the burner tube, which in turn produces an uneven heat distribution in the oven.
  • An elliptical cross section occurs when pipes provided with circular holes are bent.
  • the originally circular holes are distorted in the area of the bend and assume an elliptical cross-section.
  • the holes can be burned in by laser insertion. This process is complicated and expensive.
  • the laser continues to bore and thus may damage underlying material. To prevent this is tedious and requires a lot of technical and time. Mechanical drilling of the holes does not lead to a better economic result, since this method is also complex and also very time consuming.
  • the object of the invention is therefore to provide a gas burner device for heating an interior of a household appliance and a household appliance equipped therewith, which is or is less expensive to produce. In particular, a uniform combustion behavior should be achievable.
  • the gas burner device according to the invention is used for heating an interior of a household appliance and in particular a baking oven.
  • the gas burner device has at least one burner tube, wherein the burner tube comprises at least one carrier profile and at least one gas outlet plate connected thereto, in which holes are provided for the gas outlet.
  • This design allows separate production and storage of carrier profile and gas outlet plate.
  • the carrier profile can be designed with a larger sheet thickness than the gas outlet plate, which costs can be saved. A separate production is possible. This saves additional material and costs.
  • the holes in the gas outlet plate are particularly preferably punched. This makes it possible to inexpensively produce gas outlet plates with a large number of holes with great precision and high production speed. Size and geometry of the holes can also be designed differently on a sheet.
  • the carrier profile is in particular gas-tightly connected to the at least one gas outlet plate.
  • Gas-tight connections ensure a uniform supply. This connection is preferably made by welding or crimping.
  • a screw connection between the carrier profile and the at least one gas outlet plate is also possible, but may possibly require the use of seals. The connection should remain gas-tight even during the operating temperatures.
  • the carrier profile is designed in particular as DIN rail, wherein the gas outlet plate is preferably designed as a flat sheet.
  • the DIN rail is designed as a U-shaped profile having two flat bearing surfaces. The bearing surfaces serve to build or conditioning of the gas outlet plate.
  • the gas outlet plate and the carrier profile advantageously have different sheet thicknesses.
  • the different sheet thicknesses are due to the different thermal and mechanical stress possible and allow cost optimization.
  • the carrier profile has a slightly larger wall thickness and also serves for stabilization, while the gas outlet plate can be very thin.
  • the gas outlet plate in particular has a thickness of about 0.2 mm to about 1.0 mm. Preferably, the thickness is between 0.3 mm and 0.7 mm. In the particularly preferred embodiment, the gas outlet plate has a thickness of 0.4 mm to 0.6 mm.
  • a particularly great advantage of the small thickness of the gas outlet plate lies in the fact that the flame pattern is very positively influenced.
  • the gas outlet plate is adjusted by bending - in sections - the outer contour of the carrier profile.
  • the flame nozzles can be much more uniform in a burner tube according to the invention, so that a uniform flame pattern is made possible.
  • Heavily elliptical holes have a different gas outlet than circular holes.
  • an uneven flame and a non-uniform flame pattern over a circumference of the gas outlet plate may occur. This effect is virtually completely avoided in the variant according to the invention.
  • distortions occur as a result of wall thickness, which are significantly greater.
  • a defined and reproducible flame pattern is important, as with an undefined flame pattern incomplete combustion can occur, which can even produce toxic carbon monoxide.
  • the gas burner tube according to the invention is preferably designed as a particular closed ring, which may preferably be designed substantially rectangular. This embodiment is preferred because the cross sections of most ovens have a square or rectangular shape. Alternatively, it is also possible to make gas burner tubes as a ring, which has a substantially circular or elliptical shape.
  • the gas burner device has holes in the gas outlet plate. These holes are preferably arranged in rows on the gas outlet plate. In a particularly preferred embodiment, two rows are executed parallel to each other.
  • the holes in the gas outlet plate have predefined dimensions.
  • the holes have approximately the same dimensions in terms of manufacturing accuracy.
  • the holes of a lower row have a smaller diameter than the holes of an upper row.
  • the holes with the smaller diameters contribute to an ignition of the flame to ensure a Flammenrundlauf. In addition, they ensure a quick re-ignition of the upper flame when extinguishing an upper flame.
  • the holes of the lower row are preferably arranged vertically displaced from the holes of the upper row. This arrangement has been made to permit flame ignition of the gas leaving the top holes with the smaller holes.
  • a central gas supply is provided. This gas supply supplies the gas burner tube with gas.
  • the gas burner device may have, in addition to an ignition device, a device for temperature control of the flame and a gas outlet sensor.
  • the gas leakage sensor emits in particular an optical and an acoustic alarm, if escaping gas is not burned.
  • the combined alarm is very beneficial for use in kitchens that are also used by people with sensory disabilities such as poor vision or hearing. If required, this sensor can also be equipped with radio monitoring for alarm signaling. This is important if the user can not stay in the kitchen during the entire cooking time.
  • the household appliance according to the invention serves in particular as an oven and has at least one interior to be heated. At least one gas burner device is provided for heating the at least one interior space.
  • the or at least one gas burner device comprises at least one burner tube, wherein the burner tube has at least one carrier profile and at least one gas outlet plate connected thereto. In the gas outlet plate holes are provided for gas outlet.
  • the gas burner device is designed according to at least one development described above.
  • FIG. 1 shows a household appliance designed here as Hherd 1 with an open Garrraum 2.
  • the bottom surface 3 of the cooking chamber has an approximately rectangular cross-section. Below the bottom surface 3 is - not visible in this illustration - a gas burner device according to the invention.
  • the back 4 of the cooking chamber has a circulating air fan 5.
  • On the top four separate gas-operated hobs 16 are provided here. In other embodiments, radiant panels or induction hobs may also be provided.
  • control buttons 17 are used to set the hobs 16 and setting the temperature in the cooking chamber. 2
  • FIG. 2 shows the stove 1 highly schematized with built-in gas burner device 6 in an exploded view.
  • the bottom surface 3 of the cooking chamber 2 was shown on the front side 7 in section.
  • Clearly visible is a line 8 for the central gas supply and the burner tube 9.
  • the burner tube 9 has a carrier profile 10 and a base profile and a gas outlet plate 11 on.
  • a circulating air blower 5 is installed, which transports heated air from the region of the gas burner tube 11 in the region of the cooking chamber 2 as circulating air.
  • the gas outlet plate 11 has holes 13, which are also referred to as flame nozzles.
  • the holes 13 are preferably produced by punching.
  • the carrier profile 10 is connected to at least the gas outlet plate 11 and in particular welded here. This construction facilitates an execution of burner tubes 9 even with complex geometry with simple production.
  • the carrier profile 10 is made in the particularly preferred embodiment as DIN rail, wherein the gas outlet plate 11 is designed as a flat sheet.
  • the combination of hat rail and flat plate is also for the production of the combustion tube 9 of advantage, since it greatly facilitates the fixation of the gas outlet plate 11 on the support section 10.
  • the gas outlet plate 11 and the carrier profile 10 are preferably connected by welding or flanging gas-tight together.
  • FIG. 3 shows a built-in oven 2 gas burner device 6 in a plan view in section.
  • the burner tube 9 has a substantially rectangular shape with rounded corners and is designed as a closed ring.
  • the gas is supplied centrally via the line 8.
  • the illustration clearly shows that, for example, in the inner region 14 of the burner tube 9, a further burner tube 9 could be placed. This option could be interesting for use in commercial kitchens, as it is also the speed in the foreground.
  • FIG. 4 shows in the left part of a lateral section through the burner tube 9 and a front view of the gas outlet plate 11 in the right part.
  • the carrier profile 10 is designed as a hat profile.
  • the hat profile has contact surfaces 15 at the upper and at the lower edge.
  • the contact surfaces 15 allow for the welding process a quick and easy fixation of the gas outlet plate 11 on or on the support section 10, for example with a screw clamp.
  • the carrier profile 10 and the gas outlet plate 11 are shown separated from each other. This representation was chosen in order to be able to represent the shape of the carrier profile 10 and of the gas outlet plate 11 in a defined manner.
  • the gas outlet plate 11 and the carrier profile 10 are made in different sheet thicknesses.
  • the gas outlet plate 11 has a thickness of 0.2 mm to 1.0 mm.
  • the gas exit plate 11 has a thickness between about 0.3 mm and about 0.7 mm.
  • the carrier profile 10 can be designed to be somewhat more stable for carrying, while the gas outlet plate 11 can be optimized for a homogeneous gas outlet and a homogeneous flame pattern. While the carrier profile 10 is exposed to a combined, predominantly thermomechanical load, the load of the gas outlet plate 11 1 is predominantly on the thermal component.
  • the holes 13 are arranged on the gas outlet plate 11.
  • the holes 13 are preferably provided in two rows on the gas outlet plate 11. In a particularly preferred embodiment, the rows are arranged parallel to one another.
  • the holes 13 have predefined same dimensions.
  • the holes 13 are preferably circular in shape and have a defined diameter, with the holes 13 of a lower row having a smaller radius than the holes 13 of an upper row.
  • Gas outlet plates are also executable with three or more rows of holes.
  • These constructions preferably - analogously to FIG. 2 -
  • the holes 13 of the lower row are here arranged vertically shifted to the holes 13 of the upper row.
  • the holes 13 with the smaller radii in the lower row serve firstly as a backup row to ensure a flame run-up during ignition. Second, in the case of extinction of the upper flame, the series serves to quickly reignite it.
  • the small sheet thickness of the gas outlet plate 11 already described above proves to be a great advantage in curved sections of the burner tube 9.
  • holes in thick sheets in the bends take on an approximately elliptical shape.
  • the expression of the elliptical shape depends on the sheet thickness and a radius of curvature. Due to the very small thicknesses of the gas outlet plate 11, the effect described above is hardly noticeable here.
  • the geometry of the holes 13 of the gas exit plate 11 plays an important role in the local flame formation. If the originally circular holes 13 change their shape to an elliptical shape, this may possibly result in an uneven flame and an uneven flame pattern.
  • a defined flame pattern is important, among other things, for uniform heating and complete combustion.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Baking, Grill, Roasting (AREA)
EP09401049A 2009-12-14 2009-12-14 Four et dispositif de brûleur à gaz, notamment pour un four Ceased EP2333418A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP09401049A EP2333418A1 (fr) 2009-12-14 2009-12-14 Four et dispositif de brûleur à gaz, notamment pour un four
US12/966,076 US20110139142A1 (en) 2009-12-14 2010-12-13 Baking oven and gas burner device, particularly for a baking oven

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09401049A EP2333418A1 (fr) 2009-12-14 2009-12-14 Four et dispositif de brûleur à gaz, notamment pour un four

Publications (1)

Publication Number Publication Date
EP2333418A1 true EP2333418A1 (fr) 2011-06-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP09401049A Ceased EP2333418A1 (fr) 2009-12-14 2009-12-14 Four et dispositif de brûleur à gaz, notamment pour un four

Country Status (2)

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US (1) US20110139142A1 (fr)
EP (1) EP2333418A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013102885A1 (de) * 2013-03-21 2014-09-25 Miele & Cie. Kg Gargerät

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9504351B2 (en) * 2013-10-11 2016-11-29 Haler U.S. Appliance Solutions, Inc. Double oven appliance
US9970655B2 (en) 2015-07-16 2018-05-15 Haier US Appliance Solutions, Inc Oven appliance
WO2018187458A2 (fr) * 2017-04-07 2018-10-11 The Middleby Corporation Système de distribution de chaleur de four à bande transporteuse
KR102613464B1 (ko) * 2018-12-19 2023-12-14 삼성전자주식회사 오븐
US11369117B2 (en) 2018-12-20 2022-06-28 The Middleby Corporation Conveyor oven air system
USD893237S1 (en) * 2019-01-02 2020-08-18 Samsung Electronics Co., Ltd. Gas oven range
USD918637S1 (en) * 2019-06-04 2021-05-11 Dongguan Hyxion Metal Technology Co., Ltd. Oven

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0055911A2 (fr) * 1981-01-02 1982-07-14 Ewarts Limited Brûleurs à gaz
EP0267747A2 (fr) * 1986-11-13 1988-05-18 New World Domestic Appliances Limited Brûleur à gaz et fourneaux munis de tels brûleurs
US5601073A (en) * 1995-01-06 1997-02-11 Shimek; Ronald J. Flat pan gas burner for gas fireplaces

Family Cites Families (14)

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Publication number Priority date Publication date Assignee Title
US1224157A (en) * 1916-08-31 1917-05-01 Detroit Stove Works Gas-burner.
US3496926A (en) * 1968-10-01 1970-02-24 Caloric Corp Gas burner pilot control
US4305372A (en) * 1980-05-27 1981-12-15 Columbia Industries Corporation Plural chamber gas burner
EP0299394B1 (fr) * 1987-07-13 1992-06-17 Matsushita Electric Industrial Co., Ltd. Dispositif de combustion de gaz
US5406703A (en) * 1993-10-12 1995-04-18 Greene Manufacturing Company Method of making a tube burner for cooking apparatus
US5992770A (en) * 1998-09-23 1999-11-30 Culpepper; J. Manning Burner for grill and method for making same
US6045356A (en) * 1998-10-07 2000-04-04 Monessen Hearth Systems, Inc. Gas burner and fabrication method for same
US6672302B1 (en) * 2002-07-25 2004-01-06 Wayne/Scott Fetzer Company Gas burner
US6945774B2 (en) * 2003-03-07 2005-09-20 Weber-Stephen Products Co. Gas burner with flame stabilization structure
US20060088796A1 (en) * 2004-10-22 2006-04-27 William Home Tube burner flame hole construction
DE102005031231B3 (de) * 2005-07-01 2007-01-11 J. Eberspächer GmbH & Co. KG Wandstruktur für einen Brenner
KR20100013996A (ko) * 2008-08-01 2010-02-10 엘지전자 주식회사 가스오븐레인지
KR101073238B1 (ko) * 2009-04-17 2011-10-12 엘지전자 주식회사 버너 및 조리기기
EP2241818B1 (fr) * 2009-04-17 2017-11-22 LG Electronics Inc. Brûleur et dispositif de cuisson

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0055911A2 (fr) * 1981-01-02 1982-07-14 Ewarts Limited Brûleurs à gaz
EP0267747A2 (fr) * 1986-11-13 1988-05-18 New World Domestic Appliances Limited Brûleur à gaz et fourneaux munis de tels brûleurs
US5601073A (en) * 1995-01-06 1997-02-11 Shimek; Ronald J. Flat pan gas burner for gas fireplaces

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013102885A1 (de) * 2013-03-21 2014-09-25 Miele & Cie. Kg Gargerät

Also Published As

Publication number Publication date
US20110139142A1 (en) 2011-06-16

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