EP0816758A1 - Dispositif de répartition des flammes pour un brûleur d'un appareil à eau chaude - Google Patents

Dispositif de répartition des flammes pour un brûleur d'un appareil à eau chaude Download PDF

Info

Publication number
EP0816758A1
EP0816758A1 EP97201744A EP97201744A EP0816758A1 EP 0816758 A1 EP0816758 A1 EP 0816758A1 EP 97201744 A EP97201744 A EP 97201744A EP 97201744 A EP97201744 A EP 97201744A EP 0816758 A1 EP0816758 A1 EP 0816758A1
Authority
EP
European Patent Office
Prior art keywords
distributing plate
distributing
flame
burner
burner deck
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
EP97201744A
Other languages
German (de)
English (en)
Other versions
EP0816758B1 (fr
Inventor
Jacob Jozeph Marijnen
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.)
Robert Bosch GmbH
Original Assignee
Radson Alutherm NV
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 Radson Alutherm NV filed Critical Radson Alutherm NV
Publication of EP0816758A1 publication Critical patent/EP0816758A1/fr
Application granted granted Critical
Publication of EP0816758B1 publication Critical patent/EP0816758B1/fr
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
    • 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
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/00003—Fuel or fuel-air mixtures flow distribution devices upstream of the outlet

Definitions

  • This invention relates to a flame distributing device intended for a burner of a hot water appliance for the purpose of water heating, which flame distributing device comprises a burner deck with a specific hole pattern and a distributing plate with a specific hole pattern, the burner deck and the distributing plate extending substantially parallel to each other.
  • Such a flame distributing device is known from practice and is already being used by applicant in its central heating boilers and marketed.
  • the distributing plate is arranged at a very short distance from the burner deck.
  • the distributing plate is primarily intended for regulating the supply of the fuel/air mixture to the burner deck.
  • the combustion load should not be uniform over the entire burner deck.
  • this is effected by making the hole pattern in the distributing plate of irregular design. In some areas of the distributing plate there are large holes spaced apart a short distance, while in other areas the distributing plate is provided with small holes spaced apart a large distance.
  • a requirement for preventing resonances and vibrations in the known flame distributing device is therefore a very short distance between the distributing plate and the burner deck. This slight distance, however, has a number of drawbacks. Firstly, a flame distributing device of such design constitutes a high flow resistance, so that a powerful fan is needed to force the fuel/air mixture through the flame distributing device. A second drawback is that from the point of view of manufacturing technique it is not easy to manufacture such a flame distributing devide. In fact, the product tolerances require great precision, since a narrow gap across a large surface must be created.
  • distributing plate Other functions of the distributing plate are cooling the burner deck and preventing flashback into the mixing chamber arranged upstream of the flame distributing device. Both functions are obtained in an effective manner only if between the burner deck and the distributing plate a gap is indeed present. Especially in the case of the very small gap width, there is a chance that the gap is sometimes partly lost and the distributing plate is in abutment with the burner deck. Under those circumstances the two last-mentioned functions of the distributing plate are undone.
  • the object of the invention is to provide a flame distributing device which has a lower flow resistance and which requires less precision in terms of the product tolerances and with which further a variable combustion load over the surface of the burner deck is created.
  • the flame distributing device of the type described in the preamble is characterized in that a space between the distributing plate and the burner deck is divided into a number of segment chambers, between which segment chambers no flow or substantially no flow of fuel/air mixture is possible, and at each segment chamber the distributing plate has a specific hole pattern.
  • the distance between the burner deck and the distributing plate can be greater, and a flame distributing device with a lower flow resistance is obtained. Additionally, owing to the greater distance between the burner deck and the distributing plate, greater product tolerances will suffice, which enables a simpler manufacturing process.
  • the only way out for the fuel/air mixture from a segment chamber is formed by the burner deck segment that covers the segment chamber in question. The combustion load of a relevant burner deck segment is therefore entirely dependent on the supply of the fuel/air mixture to the segment chamber associated with that burner deck segment. Thus a highly specific combustion load per segment can be chosen.
  • the segment chambers can be formed by recesses in the distributing plate, the distributing plate being substantially in abutment with the burner deck apart from the distributing plate segments formed by the recesses, so that at each recess a segment chamber is formed between the burner deck and the distributing plate.
  • a flame distributing device of such design can be manufactured economically.
  • the walls bounding the recesses constitute only a small portion of the surface of the distributing plate and can therefore abut safely against the burner deck without the cooling function and the flashback prevention function being lost. These walls prevent fuel/air mixture from flowing from one segment chamber to another segment chamber.
  • the respective specific hole patterns of at least a number of the various segment chambers differ from each other.
  • a specific combustion frequency is obtained, these frequencies being mutually different for at least a number of the various segment chambers.
  • the presence of these different frequencies prevents the occurrence of resonances or vibrations and hence of phenomena such as whistling and rumbling.
  • the hole patterns of two diametrically opposite segment chambers correspond to each other, these hole patterns being chosen such that at that point a burner load is obtained which is suitable for ignition using a spark.
  • a flame distributing device of such design can never be mounted incorrectly. That is, the hole pattern in the distributing plate that is suitable for ignition using a spark is located adjacent the spark generating element in both possible mounting positions of the flame distributing device.
  • the flame distributing device comprises a housing with a distributing plate mounting opening, which distributing plate mounting opening is covered up by the distributing plate which has been connected to the housing by welding so as to form a gap, in which gap the edges of the burner deck are slidably received so that the burner deck can expand and shrink freely.
  • a flame distributing device of such design can be manufactured economically and is particularly durable in that the burner deck does not undergo any particular stresses resulting from expansion or shrinkage.
  • Fig. 1 shows a partial cross-sectional elevation of a hot water appliance 3 comprising a heat exchanger 10 which includes a burner 2.
  • the heat exchanger 10 comprises flue ducts 11 and water-conveying channels 12.
  • the burner 2, which comprises a fuel/air mixture chamber 13, is supplied with air and fuel, in the present case gas, by means of a fan 16.
  • the air is sucked in via an air suction channel 14 and the gas is supplied via a gas supply channel 15.
  • the gas/air mixture formed in the fan 16 is blown into the mixture chamber 13 of the burner 2 via the gas/air mixture supply pipe 17. Then the gas/air mixture passes the flame distributing device 1 which is represented in detail in Figs. 2 and 3.
  • Fig. 2 shows a longitudinal section of the flame distributing device 1
  • Fig. 3 shows a transverse section of the flame distributing device 1 as well as a detail thereof.
  • the flame distributing device 1 comprises a housing 8, a distributing plate 5 and a burner deck 4.
  • the distributing plate 5 is provided with recesses 5a which, together with the burner deck 4, define segment chambers 7.
  • the recesses 5a are separated from each other by walls 5b which substantially abut against the burner deck 4.
  • the walls 5b form the boundaries of the segment chambers 7.
  • the burner deck 4 is provided with a regular hole pattern which ensures a good combustion of the gas/air mixture.
  • the distributing plate 5 has a specifically designed hole pattern 6 for each segment chamber 7.
  • the specific hole patterns 6 in the distributing plate 5 of at least a number of the various segment chambers 7 differ from each other.
  • a different combustion load over the surface of the burner deck 4 is obtained, so that different combustion frequencies occur over the burner deck 4. This prevents the occurrence of resonances and vibrations which cause whistling or rumbling.
  • the differently designed hole patterns in the distributing plate are clearly depicted in the top plan view of the distributing plate shown in Fig. 4. At some segment chambers 7, the distributing plate has many large holes and few small holes, while at other segment chambers 7, by contrast, it has many small holes and few large holes. It is clear that it is also possible to choose more than two different diameters for the hole pattern or to choose holes of different shapes and/or dimensions.
  • the hole patterns 6' and 6" of two diametrically opposite segment chambers 7', 7", which segment chambers 7', 7" are each located in a corner of the distributing plate 5, are of equal design and chosen so as to yield a burner load that is suitable for ignition using a spark.
  • the flame distributing device can never be assembled incorrectly, since in both assembly positions the hole pattern that is desired for ignition is located adjacent the spark generating element.
  • the housing 8 is provided with a distributing plate mounting opening 8a.
  • the distributing plate mounting opening 8a is covered up by the distributing plate 5 which has been connected to the housing 8 by welding so as to form a gap 9.
  • the edges of the burner deck 4 are slidably received, so that the burner deck can freely expand and shrink. This prevents the occurrence of undesired stresses in the burner deck 4 resulting from expansion or shrinkage due to temperature fluctuations.
  • segment chambers which, in the embodiment described, are formed by the recesses in the distributing plate according to the invention can also be formed in a different manner.
  • the burner deck can be provided with recesses and the distributing plate can have a substantially level surface.
  • walls are included which extend substantially perpendicularly to the main surfaces of the burner deck and the distributing plate, which vertical walls bound a number of segment chambers.

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)
  • Paper (AREA)
EP97201744A 1996-06-10 1997-06-09 Dispositif de répartition de flammes pour un brûleur d'un appareil à eau chaude Expired - Lifetime EP0816758B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1003311A NL1003311C2 (nl) 1996-06-10 1996-06-10 Vlamverdeelinrichting bestemd voor een brander van een warmwatertoestel.
NL1003311 1996-06-10

Publications (2)

Publication Number Publication Date
EP0816758A1 true EP0816758A1 (fr) 1998-01-07
EP0816758B1 EP0816758B1 (fr) 2001-11-14

Family

ID=19762995

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97201744A Expired - Lifetime EP0816758B1 (fr) 1996-06-10 1997-06-09 Dispositif de répartition de flammes pour un brûleur d'un appareil à eau chaude

Country Status (4)

Country Link
EP (1) EP0816758B1 (fr)
AT (1) ATE208879T1 (fr)
DE (1) DE69708212T2 (fr)
NL (1) NL1003311C2 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6461150B1 (en) * 1999-10-29 2002-10-08 Centre D'etude Et De Realisation D'equipment Et De Materiel (Cerem) Very low pressure gas-fired overhead radiant heater with atmospheric primary air supply by means of a venturi
NL1018054C2 (nl) * 2001-05-11 2002-11-12 Dejatech Bv Samenstel van een brander en een branderbehuizing.
ITMI20110390A1 (it) * 2011-03-11 2012-09-12 Bertelli & Partners Srl Bruciatore a gas perfezionato per combustione premiscelata
ITUA20164076A1 (it) * 2016-06-03 2017-12-03 Worgas Bruciatori Srl Bruciatore
WO2019201600A1 (fr) * 2018-04-19 2019-10-24 Bekaert Combustion Technology B.V. Brûleur à gaz de prémélange

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0314897A1 (fr) * 1987-10-31 1989-05-10 Ruhrgas Aktiengesellschaft Brûleur à gaz avec prémélange et excès d'air
EP0472270A1 (fr) * 1990-06-21 1992-02-26 Furigas (U.K.) Limited Brûleur à gaz
WO1994016269A1 (fr) * 1993-01-15 1994-07-21 Joseph Le Mer Procede de fabrication d'un element de bruleur a gaz, element de bruleur et bruleur en faisant utilisation
EP0698766A2 (fr) * 1994-08-26 1996-02-28 Caradon Ideal Limited Brûleur à gaz
US5520536A (en) * 1995-05-05 1996-05-28 Burner Systems International, Inc. Premixed gas burner

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0314897A1 (fr) * 1987-10-31 1989-05-10 Ruhrgas Aktiengesellschaft Brûleur à gaz avec prémélange et excès d'air
EP0472270A1 (fr) * 1990-06-21 1992-02-26 Furigas (U.K.) Limited Brûleur à gaz
WO1994016269A1 (fr) * 1993-01-15 1994-07-21 Joseph Le Mer Procede de fabrication d'un element de bruleur a gaz, element de bruleur et bruleur en faisant utilisation
EP0698766A2 (fr) * 1994-08-26 1996-02-28 Caradon Ideal Limited Brûleur à gaz
US5520536A (en) * 1995-05-05 1996-05-28 Burner Systems International, Inc. Premixed gas burner

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6461150B1 (en) * 1999-10-29 2002-10-08 Centre D'etude Et De Realisation D'equipment Et De Materiel (Cerem) Very low pressure gas-fired overhead radiant heater with atmospheric primary air supply by means of a venturi
US6612834B2 (en) 1999-10-29 2003-09-02 Centre D'etude Et De Realisation D'equipment Et De Materiel Very low pressure gas-fired overhead radiant heater with atmospheric primary air supply by means of a venturi
NL1018054C2 (nl) * 2001-05-11 2002-11-12 Dejatech Bv Samenstel van een brander en een branderbehuizing.
EP1256760A1 (fr) * 2001-05-11 2002-11-13 Dejatech B.V. Assemblage comprenant un brûleur et son boítier
ITMI20110390A1 (it) * 2011-03-11 2012-09-12 Bertelli & Partners Srl Bruciatore a gas perfezionato per combustione premiscelata
WO2012123805A1 (fr) * 2011-03-11 2012-09-20 Bertelli & Partners S.R.L. Brûleur à gaz perfectionné pour une combustion prémélangée
CN103443544A (zh) * 2011-03-11 2013-12-11 贝尔泰利联合公司 用于预混式燃烧的改进的气体燃烧器
ITUA20164076A1 (it) * 2016-06-03 2017-12-03 Worgas Bruciatori Srl Bruciatore
WO2017208107A1 (fr) * 2016-06-03 2017-12-07 Worgas Bruciatori S.R.L. Brûleur
WO2019201600A1 (fr) * 2018-04-19 2019-10-24 Bekaert Combustion Technology B.V. Brûleur à gaz de prémélange

Also Published As

Publication number Publication date
DE69708212T2 (de) 2002-07-25
EP0816758B1 (fr) 2001-11-14
NL1003311C2 (nl) 1997-12-17
DE69708212D1 (de) 2001-12-20
ATE208879T1 (de) 2001-11-15

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