US20100294214A1 - Burner for gas boiler - Google Patents

Burner for gas boiler Download PDF

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Publication number
US20100294214A1
US20100294214A1 US12/523,726 US52372608A US2010294214A1 US 20100294214 A1 US20100294214 A1 US 20100294214A1 US 52372608 A US52372608 A US 52372608A US 2010294214 A1 US2010294214 A1 US 2010294214A1
Authority
US
United States
Prior art keywords
burner
plate
main body
casing
upper 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.)
Abandoned
Application number
US12/523,726
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English (en)
Inventor
Choong Hee Lee
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.)
Kyungdong Navien Co Ltd
Original Assignee
Kyungdong Navien Co Ltd
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 Kyungdong Navien Co Ltd filed Critical Kyungdong Navien Co Ltd
Assigned to KYUNGDONG NAVIEN CO., LTD. reassignment KYUNGDONG NAVIEN CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LEE, CHOONG HEE
Publication of US20100294214A1 publication Critical patent/US20100294214A1/en
Abandoned 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
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • 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
    • F23D14/10—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 elongated tubular burner head
    • F23D14/105—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 elongated tubular burner head with injector axis parallel 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
    • F23D14/02—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
    • F23D14/045—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 a plurality of burner bars assembled together, e.g. in a grid-like arrangement
    • 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
    • F23D14/583—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration of elongated shape, e.g. slits
    • 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
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/74—Preventing flame lift-off

Definitions

  • the present invention relates to a burner for gas boilers that produce stable combustion without generating the lifting of flame by stably guiding gas and primary air to the inside of an upper plate and having a first slope having main fire holes to improve efficiency of ignition and combustion in a burner main body.
  • burners used in gas boilers or oil boilers are devices that appropriately mix gas or oil with air and then produces combustion and classified into a red flame burner, a Bunsen burner, and a premix gas burner, according to the mixing ratio of primary and secondary air.
  • the red flame burner is commonly used for gun-type burners in which fuel is injected and combustion is produced while air is mixed with the fuel.
  • the Bunsen type burner which is classified into a Bunsen burner or a semi-Bunsen burner, produces combustion, mixing fuel that is injected with primary air, and then additional secondary air is provided to produce practically complete combustion.
  • the premix burner produces combustion only with primary air and uses an impeller to improve efficiency in mixing fuel with air.
  • a circular burner generally has one venturi pipe and one nozzle unit. Therefore, it was difficult to produce combustion when gas pressure that is supplied decreases, such as rush hour, or the gas decreases in volume due to low temperature of the external air.
  • an individual venturi pipe is attached to the side of the burner, such that the entire size of burner was increased.
  • fire holes are formed through an upper horizontal surface of the burner, such that the flames became long due to the lack of second air, generating CO, NOx, etc.
  • a plurality of separate burners is provided, thereby increasing material costs and manufacturing cost. Accordingly countermeasures are needed.
  • the present invention is designed to overcome the above problems, and it is an object of the invention to provide a burner for a gas boiler that prevents lifting of flame through the main fire holes of the burner main body and stably produces combustion with the highest performance of combustion.
  • a burner for gas boiler includes: a casing that has a space inside; a fan that is connected to the lower side of the casing and supplies the external air into the casing; a nozzle unit that is connected to a side of the casing and injects gas at high speed through the front end disposed inside the casing; a burner main body that is disposed from a predetermined distance from the bottom of the casing and has a burner upper plate having main fire holes formed at regular distances at both sides in the longitudinal direction of a burner frame and a burner lower plate connected to the lower side of the burner upper plate and having a polygonal cross section; a venturi plate that is disposed on an open side of the burner main body, at the front of the nozzle unit, and has a venturi hole allowing primary air mixed with the gas injected from the nozzle unit to flow into the burner main body; an end plate that is disposed on the other side of the burner main body, facing the venturi plate; and a guide plate that is horizontally
  • the burner upper plate and the burner lower plate are made of different materials. That is, it is preferable that the burner upper plate is made of stainless steel and the burner lower plate is made of steel.
  • the burner upper plate has: a first horizontal surface having ignition holes spaced part from each other to allow ignition to transfer to the main fire holes formed through the burner upper plate; and first slopes that are each integrally formed with the first horizontal surface in the longitudinal direction, and extend downward from the first horizontal surface at a predetermined angle, while the end is bent downward.
  • the burner lower plate has: second slopes that extend inside and downward from the lower first slopes; and a second horizontal surface that is horizontally and integrally formed with the second slopes.
  • the main fire holes are formed through the first slopes of the burner upper plate.
  • the first slopes are inclined at an angle between 40° to 50° to minimize lifting of flame through the main fire holes.
  • the guide plate is positioned such that one end is in contact with the venturi plate and the other end is spaced apart from the end plate to allow the primary air supplied from the nozzle unit and the fan to smoothly flow to the burner upper plate.
  • At least one or more burner bodies are provided in the casing.
  • a secondary air diffusion plate of which one end is connected to the casing and the burner main body, horizontally extending toward the nozzle unit and the other end has a bending wall bending upward and having fixing holes where the venturi hole of the venturi plate in inserted and fixed, is disposed under the burner main body, and A plurality of secondary air-through holes are formed through the secondary air diffusion plate.
  • a burner for gas boiler according to the invention can replace existing circular burners or instantaneous bar type burners, improve the flame holding effect by forming main fire holes at an angle, and maintain the fire by constantly supplying secondary air between the main fire holes. Further, it is possible to achieve an environment-friendly boiler by reducing generation of CO, NOx, etc., because the performance of combustion is considerably improved. Furthermore, since the upper plate and lower plate of the burner main body can be made of different materials, the cost is reduced, and it is possible to reduce the width of the burner by reducing the length of the flame of the burner.
  • FIG. 1 is a view illustrating the configuration of a burner for a gas boiler according to the invention.
  • FIGS. 2 to 4 are views illustrating the operation of a burner for a gas boiler according to the invention.
  • FIG. 1 is a view illustrating the configuration of a burner for a gas boiler according to the invention
  • FIGS. 2 to 4 are views illustrating the operation of a burner for a gas boiler according to the invention.
  • a burner includes: a casing 10 that has a space inside; a fan 20 that is connected to the lower side of the casing 10 and supplies the external air into the casing 10 ; a nozzle unit 30 that is connected to a side of the casing 10 and injects gas at high speed through the front end disposed inside the casing 10 ; and a burner main body 100 that is disposed from a predetermined distance from the bottom of the casing 10 and has a burner upper plate 110 having main fire holes 112 formed at regular distances at both sides in the longitudinal direction of a burner body 101 and a burner lower plate 120 connected to the lower side of the burner upper plate 110 and having a polygonal cross section.
  • the burner further includes: a venturi plate 200 that is disposed on an open side of the burner main body 100 , at the front of the nozzle unit 30 , and has a venturi hole 210 allowing primary air mixed with the gas injected from the nozzle unit 30 to flow into the burner main body 100 ; an end plate 300 that is disposed on the other side of the burner main body 100 , facing the venturi plate 200 ; and a guide plate 400 that is horizontally disposed at the center inside the burner main body 100 and guides the gas mixture of the gas and the primary air generated by the nozzle unit 30 to the upper portion of the burner main body 100 .
  • the burner upper plate 110 and the burner lower plate 120 are made of different materials. That is, the burner upper plate 110 is preferably made of stainless steel and the burner lower plate 120 is preferably made of steel.
  • the burner upper plate 110 has a first horizontal surface 114 having ignition holes 113 ′ spaced part from each other to allow for ignition transfer to the main fire holes 112 formed through the burner upper plate 110 ; and first slopes 116 that are each integrally formed with the first horizontal surface 114 in the longitudinal direction, extend downward from the first horizontal surface 114 at a predetermined angle, while the end is bent downward.
  • the burner lower plate 120 has second slopes 122 that extend inside and downward from the lower first slopes 116 and a second horizontal surface 124 that is horizontally and integrally formed with the second slopes 122 .
  • the main fire holes 112 are formed through the first slopes 116 of the burner upper plate 110 .
  • the first slopes 116 are inclined at a predetermined inclination angle to minimize lifting of flame through the main fire holes 112 , preferably between 40° to 50° .
  • the guide plate 400 it is preferable to position the guide plate 400 such that one end is in contact with the venturi plate 200 and the other end is spaced apart from the end plate 300 to allow the primary air supplied from the nozzle unit 30 and the fan 20 to smoothly flow to the burner upper plate 110 .
  • At least one or more burner bodies 100 may be provided in the casing 10 .
  • a secondary air diffusion plate 500 of which one end is connected to the casing 10 and the burner main body 100 and the other end has a bending wall 510 bending upward and having fixing holes 512 where the venturi hole 210 of the venturi plate 200 in inserted and fixed, is disposed under the burner main body 100 .
  • a plurality of secondary air-through holes 520 are formed through the secondary air diffusion plate 500 .
  • the secondary air-through holes 520 are disposed separately and outside from the second horizontal surface 124 of the burner main body 100 to supply the secondary air generated by the fan 20 to the outside of the burner main body 100 .
  • a heat exchanger 1 including a water container (not shown) receiving water and a hot water coil (not shown) is disposed over the burner main body 100 .
  • Fuel supplied from a fuel supplier (not shown) is injected into the venturi hole 210 through the nozzle unit 30 , in which as the fuel injected from the nozzle ends of the nozzle unit 30 passes through the venturi hole 210 of the venturi plate 200 , gas mixture of the fuel and primary air around the nozzle unit 30 is supplied into the burner main body 100 in the direction of the arrows.
  • the guide plate 400 allows the primary air mixed with the fuel supplied through the nozzle unit 30 to be sufficiently mixed while flowing from the position A to B, and stably guides the gas mixture inside the burner upper plate 110 (see FIG. 1 ).
  • primary air and secondary air for combustion in the burner is supplied from the fan 20 to the secondary diffusion plate 500 and the inlet of the venturi plate 200 , through the bottom of the casing 10 .
  • the secondary air diffusion plate 500 has secondary air-through holes 520 , the primary air supplied from the fan 20 is simultaneously supplied to the outside of the burner main body 100 .
  • the primary air supplied inside the burner upper plate 110 through the guide plate 400 is ignited through the ignition hole 113 of the first horizontal surface 114 (see FIG. 1 ) and is also ignited upon being guided to the main fire holes 112 of the first slopes 116 .
  • ignition is produced around the main fire holes 112 at the other end of the burner upper plate 110 through the ignition hole 113 ′ at the other side of the first horizontal surface 114 , and consequently ignition is produced through the whole main fire holes 112 as shown in FIG. 4 .
  • the primary air mixed with the fuel by the nozzle unit 30 flows inside the upper plate 110 through the guide plate 400 of the burner main body 100 and, at the same time, the secondary air is supplied from the fan 20 to the outside of the burner main body 100 simultaneously with the primary air, such that ignition is produced through the main fire holes 112 .
  • the burner upper plate 110 of the burner main body 100 is made of stainless steel, the heat resistance is improved. Further, since the first slopes 116 have an inclination angle between 40° to 50° , the lifting of flame through the main fire holes 112 are prevented and the flames are constantly maintained in stable state.
  • the present invention provides a burner for a gas boiler that produces stable combustion with the highest performance of combustion, without generating the lifting of flame through the main fire holes of a burner main body.
US12/523,726 2007-01-19 2008-01-18 Burner for gas boiler Abandoned US20100294214A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR10-2007-0006231 2007-01-19
KR1020070006231A KR100808318B1 (ko) 2007-01-19 2007-01-19 가스보일러용 버너
PCT/KR2008/000339 WO2008088198A1 (fr) 2007-01-19 2008-01-18 Brûleur pour chaudière à gaz

Publications (1)

Publication Number Publication Date
US20100294214A1 true US20100294214A1 (en) 2010-11-25

Family

ID=39383605

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/523,726 Abandoned US20100294214A1 (en) 2007-01-19 2008-01-18 Burner for gas boiler

Country Status (6)

Country Link
US (1) US20100294214A1 (fr)
EP (1) EP2115355A1 (fr)
JP (1) JP5380304B2 (fr)
KR (1) KR100808318B1 (fr)
CN (1) CN101611263B (fr)
WO (1) WO2008088198A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110053105A1 (en) * 2008-01-16 2011-03-03 Kyungdong Navien Co., Ltd. Bunsen burner using lean-rich combustion type
US20110256490A1 (en) * 2010-04-14 2011-10-20 Grand Mate Co., Ltd. Combustor assembly of water heater
WO2015192143A1 (fr) * 2014-06-13 2015-12-17 Integrated Energy LLC Systèmes, appareils et procédés de traitement des déchets
EP3045812A1 (fr) * 2015-01-19 2016-07-20 Robert Bosch Gmbh Bruleur
US20180135888A1 (en) * 2012-06-28 2018-05-17 Purpose Co., Ltd. Burner, combustion apparatus, method for combustion, method for controlling combustion, recording medium, and water heater
US20180296956A1 (en) * 2017-04-18 2018-10-18 John Zink Company, Llc Method and apparatus for the centrifugal separation of particulates in particulate laden flows
US10718513B2 (en) * 2017-07-31 2020-07-21 Rinnai Corporation Burner
US10738995B2 (en) * 2017-07-31 2020-08-11 Rinnai Corporation Burner

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101571315B (zh) 2009-06-16 2012-05-16 艾欧史密斯(中国)热水器有限公司 一种容积式燃气热水器
KR101214745B1 (ko) * 2011-03-25 2012-12-21 주식회사 경동나비엔 유로 분리형 가스-공기 혼합장치
CN104132341B (zh) * 2014-07-07 2017-01-18 宁波多贝机械实业有限公司 燃气锅炉燃烧器
CN111425854B (zh) * 2019-11-13 2022-03-29 北京华通兴远供热节能技术有限公司 燃气锅炉
CN111765456A (zh) * 2020-06-15 2020-10-13 远安薪火燃气科技有限公司 内燃式燃烧器及炉灶
CN113834066B (zh) * 2021-09-27 2023-05-02 山东建筑大学 一种燃气热水器具的燃烧装置和方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3007457A (en) * 1958-01-27 1961-11-07 Ospelt Gustav Heating boiler
US4644904A (en) * 1984-02-23 1987-02-24 Hydrotherm Geraethebau Gmbh Gas fired heating boiler
US4723513A (en) * 1986-01-30 1988-02-09 Lochinvar Water Heater Corporation Gas water heater/boiler
US5203689A (en) * 1990-10-15 1993-04-20 The Marley Company Premix boiler construction
US5762490A (en) * 1997-06-19 1998-06-09 Burner Systems International, Inc. Premixed gas burner orifice
US5799621A (en) * 1996-11-26 1998-09-01 Burnham Corporation Boiler assembly
US8033254B2 (en) * 2005-09-07 2011-10-11 Fives North American Combustion, Inc. Submerged combustion vaporizer with low NOx

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5197841U (fr) 1975-02-03 1976-08-05
JPH0194723U (fr) * 1987-12-14 1989-06-22
JPH03170713A (ja) * 1989-11-29 1991-07-24 Dainichi Kogyo Kk 燃焼器
JPH03195806A (ja) * 1989-12-26 1991-08-27 Matsushita Electric Ind Co Ltd 燃焼装置
JPH0561611U (ja) * 1992-01-06 1993-08-13 日本ユプロ株式会社 給湯機のバーナ支持具
KR200158423Y1 (ko) * 1996-09-30 1999-10-15 전주범 파이프 가스버너
CN2366720Y (zh) * 1998-11-05 2000-03-01 姚海峰 棒型燃烧器
KR20030050295A (ko) * 2001-12-18 2003-06-25 주식회사 경동보일러 가스연료와 흡입공기의 혼합공간을 갖는 가스연소버너

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3007457A (en) * 1958-01-27 1961-11-07 Ospelt Gustav Heating boiler
US4644904A (en) * 1984-02-23 1987-02-24 Hydrotherm Geraethebau Gmbh Gas fired heating boiler
US4723513A (en) * 1986-01-30 1988-02-09 Lochinvar Water Heater Corporation Gas water heater/boiler
US5203689A (en) * 1990-10-15 1993-04-20 The Marley Company Premix boiler construction
US5799621A (en) * 1996-11-26 1998-09-01 Burnham Corporation Boiler assembly
US5762490A (en) * 1997-06-19 1998-06-09 Burner Systems International, Inc. Premixed gas burner orifice
US8033254B2 (en) * 2005-09-07 2011-10-11 Fives North American Combustion, Inc. Submerged combustion vaporizer with low NOx

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110053105A1 (en) * 2008-01-16 2011-03-03 Kyungdong Navien Co., Ltd. Bunsen burner using lean-rich combustion type
US20110256490A1 (en) * 2010-04-14 2011-10-20 Grand Mate Co., Ltd. Combustor assembly of water heater
US8647112B2 (en) * 2010-04-14 2014-02-11 Grano Mate Co., Ltd. Combustor assembly of water heater
US20180135888A1 (en) * 2012-06-28 2018-05-17 Purpose Co., Ltd. Burner, combustion apparatus, method for combustion, method for controlling combustion, recording medium, and water heater
US11346580B2 (en) * 2012-06-28 2022-05-31 Purpose Co., Ltd. Burner, combustion apparatus, method for combustion, method for controlling combustion, recording medium, and water heater
WO2015192143A1 (fr) * 2014-06-13 2015-12-17 Integrated Energy LLC Systèmes, appareils et procédés de traitement des déchets
EP3045812A1 (fr) * 2015-01-19 2016-07-20 Robert Bosch Gmbh Bruleur
US20180296956A1 (en) * 2017-04-18 2018-10-18 John Zink Company, Llc Method and apparatus for the centrifugal separation of particulates in particulate laden flows
US10718513B2 (en) * 2017-07-31 2020-07-21 Rinnai Corporation Burner
US10738995B2 (en) * 2017-07-31 2020-08-11 Rinnai Corporation Burner

Also Published As

Publication number Publication date
JP2010516988A (ja) 2010-05-20
WO2008088198A1 (fr) 2008-07-24
KR100808318B1 (ko) 2008-02-27
CN101611263A (zh) 2009-12-23
EP2115355A1 (fr) 2009-11-11
CN101611263B (zh) 2011-05-11
JP5380304B2 (ja) 2014-01-08

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Legal Events

Date Code Title Description
AS Assignment

Owner name: KYUNGDONG NAVIEN CO., LTD., KOREA, DEMOCRATIC PEOP

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LEE, CHOONG HEE;REEL/FRAME:023042/0681

Effective date: 20090716

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION