EP1582811A2 - Brûleur cylindrique - Google Patents

Brûleur cylindrique Download PDF

Info

Publication number
EP1582811A2
EP1582811A2 EP05251922A EP05251922A EP1582811A2 EP 1582811 A2 EP1582811 A2 EP 1582811A2 EP 05251922 A EP05251922 A EP 05251922A EP 05251922 A EP05251922 A EP 05251922A EP 1582811 A2 EP1582811 A2 EP 1582811A2
Authority
EP
European Patent Office
Prior art keywords
conductive film
outer peripheral
peripheral surface
face
ceramic plate
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
EP05251922A
Other languages
German (de)
English (en)
Other versions
EP1582811A3 (fr
EP1582811B1 (fr
Inventor
Yoshihiko c/o Rinnai Corporation Takasu
Misako c/o Rinnai Corporation Tachi
Hideyuki c/o Rinnai Corporation Tomiura
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.)
Rinnai Corp
Original Assignee
Rinnai Corp
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 Rinnai Corp filed Critical Rinnai Corp
Publication of EP1582811A2 publication Critical patent/EP1582811A2/fr
Publication of EP1582811A3 publication Critical patent/EP1582811A3/fr
Application granted granted Critical
Publication of EP1582811B1 publication Critical patent/EP1582811B1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/101—Flame diffusing means characterised by surface shape
    • F23D2203/1012—Flame diffusing means characterised by surface shape tubular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/102—Flame diffusing means using perforated plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2212/00—Burner material specifications
    • F23D2212/10—Burner material specifications ceramic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/12—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods

Definitions

  • the present invention relates to a cylindrical burner including a heat chamber constituted by combining plural strip-shaped ceramic plates, which have a plurality of burner ports, in a cylindrical shape.
  • the heat chamber is assembled by using a frame having plural window frames in a peripheral direction, fitting ceramic plates in the respective window frames from the outside, screwing protection frames abutting against outer surfaces in peripheral parts of the respective ceramic plates to the frame, and fixing the respective ceramic plates to the frame (e.g., see Japanese Utility Model Publication No. 44-2634).
  • a cylindrical burner including: a heat chamber constituted by combining plural strip-shaped ceramic plates, which have a plurality of burner ports, in a cylindrical shape; a coupling member that extends in an axial direction inside the heat chamber; and a pair of holding plates fixed at both ends of the coupling member, wherein the respective holding plates are set in abutment against respective end faces of the heat chamber via packings overlapping the respective end faces to sandwich the heat chamber with both the holding plates from both sides in the axial direction.
  • the frame with a complicated structure and the protection frames are made unnecessary, assembling is easy, and cost can be reduced.
  • a burner including a flat combustion plate consisting of a ceramic plate, wherein, in order to give electrical conductivity to the combustion plate to make flame detection by a flame rod possible, a conductive film is formed on an outer surface of the ceramic plate and a grounding terminal connected to this conductive film is provided to apply a voltage between the flame rod provided to be opposed to the outer surface of the ceramic plate and the conductive film (see, for example, Japanese Patent Laid-Open No. 11-351521).
  • a conductive film is formed on an outer peripheral surface of at least one predetermined ceramic plate among the plural ceramic plates constituting the heat chamber, a grounding terminal connected to the conductive film is provided to apply a voltage between flame rod provided to be opposed to the outer peripheral surface of the predetermined ceramic plate and the conductive film, and flame detection by the flame rod is performed.
  • the grounding terminal in direct contact with the conductive film on the outer peripheral surface of the ceramic plate.
  • the outer peripheral surface of the ceramic plate is formed as an arc-shaped curved surface to make an outer peripheral surface of the heat chamber cylindrical, the conductive film on the outer peripheral surface and the grounding terminal are connected less stably.
  • embodiments of the invention seek to improve the cylindrical burner of the prior application and preferably to provide a cylindrical burner in which a conductive film and a grounding terminal on an outer peripheral surface of a ceramic plate are connected surely to make it possible to warrant reliability of flame detection by a flame rod.
  • the invention preferably provides a cylindrical burner including: a heat chamber constituted by combining plural strip-shaped ceramic plates, which have a plurality of burner ports, in a cylindrical shape; a coupling member that extends in an axial direction inside the heat chamber; and a pair of holding plates fixed to both ends of the coupling member, the heat chamber being sandwiched from both sides in the axial direction by both the holding plates by setting the respective holding plates in abutment against end faces of the heat chamber via packings overlapping the respective end faces, wherein a conductive film is formed on an outer peripheral surface of at least one predetermined ceramic plate among the plural ceramic plates and a grounding terminal connected to the conductive film is provided to apply a voltage between a flame rod provided to be opposed to the outer peripheral surface of the predetermined ceramic plate and the conductive film, and a conductive film continuing to the conductive film on the outer peripheral surface is formed on one end face of the predetermined ceramic plate and a grounding terminal is provided on one holding plate corresponding to the one end face so as to be in abut
  • the heat chamber is pressed by both the holding plates from both the sides in the axial direction and the grounding terminal provided on the one holding plate is pushed against the conductive film on the one end face of the predetermined ceramic plate by a pressing force of the holding plates to come into contact with the conductive film surely even if the grounding terminal is not formed of a spring material. Therefore, the grounding terminal is advantageously connected to the conductive film on the outer peripheral surface surely via the conductive film on the one end face of the predetermined ceramic plate. Thus, reliability of flame detection by the flame rod is warranted.
  • a preliminary assembly of the heat chamber is bound such that the ceramic plates are not disarranged.
  • the holding plates are mounted at both the ends of the heat chamber.
  • a jig having a recess with a diameter matching an outer diameter of the heat chamber is used to insert ends of the plural ceramic plates in the recess of the jig in a peripheral direction to thereby combine the plural ceramic plates in a cylindrical shape.
  • corner sections of outer peripheral surfaces and end faces of the ceramic plates may hit an inner wall surface of the recess to be rubbed by the inner wall surface.
  • the corner section of the one end face and the outer peripheral surface of the predetermined ceramic plate is edged, when the corner section is rubbed, the conductive film at the corner section, which makes the conductive film on the outer peripheral surface and the conductive film on the end face continuous, peels off easily. This tends to cause connection failure between the conductive film on the outer peripheral surface and the conductive film on the end face, that is, connection failure between the conductive film on the outer peripheral surface and the grounding terminal.
  • a sunken section may be formed in a part of the corner section of the one end face and the outer peripheral surface of the predetermined ceramic plate such that the conductive film on the outer peripheral surface and the conductive film on the one end face are made continuous at least in this sunken section. Consequently, even if the corner section of the predetermined ceramic plate comes into abutment against the inner wall surface of the recess of the jig, the sunken section does not come into abutment against the inner wall surface of the recess. Thus, it is impossible that the sunken section is rubbed and the conductive film in this part peels off. Therefore, the connection failure between the conductive film on the outer peripheral surface and the grounding terminal is prevented surely.
  • the conductive film when the conductive film is formed only on the one end face of the predetermined ceramic plate, it is necessary to manage directionality of the heat chamber in a process of mounting a holding plate such that the holding plate having the grounding terminal is mounted on the one end face side. This causes trouble in mounting the holding plate. Therefore, in order to make it unnecessary to manage directionality, it is desirable to form a conductive film, which continues to the conductive film on the outer peripheral surface, on the other end face of the predetermined ceramic plate as well.
  • a cylindrical burner of the embodiment shown in FIG. 1 includes a heat chamber 1 of a cylindrical shape , a coupling member 2 (see FIG. 2 and FIG. 3(a)) that extends in an axial direction inside the heat chamber 1, and a pair of holding plates 3 and 4 fixed to both ends of the coupling member 2 to sandwich the heat chamber 1 from both sides in the axial direction.
  • the holding plate 3 on one end side includes an attaching plate section 5 fixed to the holding plate 3 by spot welding or the like. In the attaching plate section 5, the cylindrical burner is attached to the inside of a body of a machine such as a water heater or a heater.
  • the holding plates 3 and 4 are set in abutment against respective end faces of the heat chamber 1 via respective packings 6 overlapping the respective end faces.
  • Cylindrical flange sections 3a and 4a bending inwardly in the axial direction are formed in outer peripheries of the respective holding plates 3 and 4 to prevent the packings 6 from deviating in a radial direction. Note that a diameter of the flange sections 3a and 4a expands inwardly in the axial direction such that work for mounting the respective holding plates 3 and 4 on the heat chamber 1 is facilitated.
  • the heat chamber 1 is constituted by combining plural (e.g., six) strip-shaped ceramic plates 7, which have a plurality of burner ports 7a, in a cylindrical shape.
  • the burner ports 7a are not formed in parts closer to ends of the ceramic plates 7.
  • dummy burner ports 7b of a blank hole shape are formed in the parts closer to the ends of the ceramic plates 7 due to a reason relating to manufacturing such as uniformalization of a shrinking percentage at the time of baking of the ceramic plates 7.
  • a gas inlet 5a is opened in a central part of the attaching plate section 5.
  • the coupling member 2 is formed in a square cylindrical shape.
  • the coupling member 2 is fixed to an inner surface in a peripheral edge of the gas inlet 5a of the attaching plate 5 at one end by spot welding or the like. Therefore, the holding plate 3 on one end side is fixed to one end of the coupling member 2 in the attaching plate section 5.
  • a large number of through holes 2a are formed in a peripheral surface of the coupling member 2.
  • Mixed gas of fuel gas flowing in from the gas inlet 5a and primary air is supplied into the heat chamber 1 via these through holes 2a and blows out from burner ports 7a of the respective ceramic plates 7 to burn.
  • the coupling member 2 functions as a distributing pipe for distributing the mixed gas into the heat chamber 1 uniformly.
  • a cap 2b is fastened to the other end of the coupling member 2.
  • a projected portion 2c. which is fit into an inner periphery of the holding plate 4 on the other end side formed in an annular shape, is formed in this cap 2b.
  • the preliminarily assembled heat chamber 1 is bound by an appropriate binding tool such as a band such that the ceramic plates 7 are not disarranged.
  • the coupling member 2 is inserted into the heat chamber 1 to set the holding plate 3 on the one side in abutment against one end face of the heat chamber 1 via the packing 6.
  • the holding plate 4 on the other end side is set in abutment against the other end face of the heat chamber 1 via the packing 6.
  • the projected portion 2c is inserted into the inner periphery of the holding plate 4.
  • the projected portion 2c is crushedinwardly in the axial direction. Consequently, the holding plate 4 is caulked and fixed to the coupling member 2 in a state in which the holding plate 4 is pressed inwardly in the axial direction.
  • the heat chamber 1 is sandwiched firmly between both the holding plates 3 and 4.
  • a conductive film 71 is formed on the outer peripheral surface of the #1 ceramic plate 7.
  • the conductive film 71 is grounded via a grounding terminal 9, one pole of a DC power supply 10 is grounded, and the other pole of the DC power supply 10 is connected to the flame rod 8 via a current detector 11 to apply a voltage between the flame rod 8 and the conductive film 71. Flames due to gas jetted from the burner ports 7a are formed on the outer peripheral surface of the #1 ceramic plate 7.
  • the conductive film 71 is formed by, for example, bake-finishing conductive ceramics such as perovskite metal oxide on the ceramic plate 7.
  • a conductive film 72 continuing to the conductive film 71 on the outer peripheral surface is formed on an end face on one end side of the #1 ceramic plate 7 to set the grounding terminal 9, which is provided in the holding plate 3 on one end side, in contact with this conductive film 72.
  • the grounding terminal 9 is constituted by a metal piece bending in a trapezoidal shape that is fixed to the attaching plate section 5 of the holding plate 3 by spot welding or the like.
  • a through hole 6a corresponding to the grounding terminal 9 is formed in the packing 6 such that the grounding terminal 9 is set in abutment against the conductive film 72 on the end face of the #1 ceramic plate 7 through the through hole 6a. Note that the grounding terminal 9 is grounded via the attaching plate section 5.
  • the end face of the ceramic plate 7 is flat and, as described above, the heat chamber 1 is pushed from both the sides in the axial direction by both the holding plates 3 and 4 and sandwiched between both the holding plates 3 and 4.
  • the grounding terminal 9 provided on the holding plate 3 on one end side is pushed against the conductive film 72 on the one end face of the #1 ceramic plate 7 to be in contact with the conductive film 72 surely even if the grounding terminal 9 is not formed of a spring material. Therefore, the grounding terminal 9 is connected to the conductive film 71 on the outer peripheral surface surely via the conductive film 72 on the one end face of the #1 ceramic plate 7. Thus, reliability of flame detection by the flame rod 8 is warranted.
  • the conductive film 72 is formed only on the one end face of the #1 ceramic plate 7, it is necessary to manage directionality of the heat chamber 1 in a process of mounting the holding plate 3 such that the holding plate 3 is mounted on the one end face side. This causes trouble in mounting the holding plate 3. Therefore, in order to make it unnecessary to manage directionality, it is desirable to form a conductive film, which continues to the conductive film 71 on the outer peripheral surface, on the other end face of the #1 ceramic plate as well.
  • the grounding terminal 9 may be provided on both the holding plates 3 and 4.
  • the separate grounding terminal 9 is fixed to the attaching plate section 5 of the holding plate 3. However, it is also possible to form the grounding terminal 9 integrally with the attaching plate section 5.
  • corner sections of outer peripheral surfaces and end faces of the ceramic plates 7 may hit an inner wall surface of the recess to be rubbed by the inner wall surface.
  • the corner sections of the outer peripheral surfaces and the end faces of the ceramic plates 7 may be rubbed by the flange section 3a of the holding plate 3.
  • the corner section of the end face and the outer peripheral surface of the #1 ceramic plate 7 is chamfered to form a rounded R-shaped chamfered part 7c. Consequently, because of the chamfered part 7c, it is possible to secure a large coupling area of a conductive film 73 in the corner section with respect to an area of the ceramic plate 7. Therefore, it is difficult to peel off the conductive film 73 in the corner section and the connection failure between the conductive film 71 on the outer peripheral surface and the grounding terminal 9 is prevented effectively.
  • the chamfered part 7c is also formed in corner sections of the ceramic plates 7 other than the #1 ceramic plate 7.
  • the chamfered part 7c may be formed in a slope shape.
  • the chamfered part 7c slides better when the chamfered part 7c comes into abutment against the inner wall surface of the recess of the jig or the flange section 3a of the holding plate 3.
  • the conductive film 73 in the corner section is prevented from peeling off more effectively.
  • a sunken section 7d may be formed in a part of the corner section of the end face and the outer peripheral surface of the #1 ceramic plate 7 such that the conductive film 71 on the outer peripheral surface and the conductive film 72 on the end face are made continuous at least in this sunken section 7d. Consequently.
  • the conductive film 71 on the outer peripheral surface and the conductive film 72 on the end face maybe made continuous in parts other than the sunken section 7d.
  • the sunken section 7d is formed in a central part of the corner section of the #1 ceramic plate 7.
  • the sunken section 7d maybe formed in any part of the corner section.
  • the burner ports 7a are not shown for simplification of illustration.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Control Of Combustion (AREA)
EP20050251922 2004-03-29 2005-03-29 Brûleur cylindrique Ceased EP1582811B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004096338 2004-03-29
JP2004096338A JP4034749B2 (ja) 2004-03-29 2004-03-29 筒状バーナ

Publications (3)

Publication Number Publication Date
EP1582811A2 true EP1582811A2 (fr) 2005-10-05
EP1582811A3 EP1582811A3 (fr) 2011-12-14
EP1582811B1 EP1582811B1 (fr) 2013-03-06

Family

ID=34879925

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050251922 Ceased EP1582811B1 (fr) 2004-03-29 2005-03-29 Brûleur cylindrique

Country Status (2)

Country Link
EP (1) EP1582811B1 (fr)
JP (1) JP4034749B2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008142531A3 (fr) * 2007-05-21 2009-08-27 Worgas - Bruciatori - S.R.L. Modulation du brûleur
EP2180253A1 (fr) * 2008-10-24 2010-04-28 Worgas Bruciatori S.R.L. Sonde de température pour brûleur et brûleur
EP3514453A1 (fr) * 2018-01-17 2019-07-24 Atag Heating B.V. Plaque de bruleur pour une chaudiere a chauffage central
US10533740B2 (en) 2015-07-09 2020-01-14 Carrier Corporation Inward fired ultra low NOX insulating burner flange

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021112468A1 (de) 2021-05-12 2022-11-17 Vaillant Gmbh Brenner für ein Heizgerät und Verwendung eines Federelements für einen Brenner
JP2024055008A (ja) 2022-10-06 2024-04-18 株式会社ノーリツ 燃焼装置およびこれを備えた温水装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6034896Y2 (ja) * 1980-12-01 1985-10-17 リンナイ株式会社 筒型ガスバ−ナ
JPS59157412A (ja) * 1983-02-25 1984-09-06 Hitachi Ltd セラミツクバ−ナ
JPS6030906A (ja) * 1983-08-01 1985-02-16 Hitachi Ltd 予混合式バ−ナ
FR2597578B1 (fr) * 1985-10-25 1991-02-08 Rinnai Kk Appareil a bruleur, notamment chauffe-eau, muni d'une soufflante
FR2589555B1 (fr) * 1985-11-06 1989-11-10 Gaz De France Bruleur a gaz a air souffle
DE19627103C1 (de) * 1996-07-05 1997-07-24 Schwank Gmbh Brennerelement
JPH11351521A (ja) * 1998-04-10 1999-12-24 Rinnai Corp 燃焼装置

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008142531A3 (fr) * 2007-05-21 2009-08-27 Worgas - Bruciatori - S.R.L. Modulation du brûleur
EP2180253A1 (fr) * 2008-10-24 2010-04-28 Worgas Bruciatori S.R.L. Sonde de température pour brûleur et brûleur
US8353627B2 (en) 2008-10-24 2013-01-15 Worgas Bruciatori S.R.L. Temperature sensor for burner, and burner
EP2330346A3 (fr) * 2008-10-24 2017-09-27 Worgas Bruciatori S.R.L. Sonde de température pour brûleur et brûleur
US10533740B2 (en) 2015-07-09 2020-01-14 Carrier Corporation Inward fired ultra low NOX insulating burner flange
EP3514453A1 (fr) * 2018-01-17 2019-07-24 Atag Heating B.V. Plaque de bruleur pour une chaudiere a chauffage central
NL2020282B1 (nl) * 2018-01-17 2019-07-25 Atag Heating B V Branderplaat voor een cv-ketel

Also Published As

Publication number Publication date
EP1582811A3 (fr) 2011-12-14
EP1582811B1 (fr) 2013-03-06
JP2005282923A (ja) 2005-10-13
JP4034749B2 (ja) 2008-01-16

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