EP1496309A2 - Gasbrenner - Google Patents

Gasbrenner Download PDF

Info

Publication number
EP1496309A2
EP1496309A2 EP04253731A EP04253731A EP1496309A2 EP 1496309 A2 EP1496309 A2 EP 1496309A2 EP 04253731 A EP04253731 A EP 04253731A EP 04253731 A EP04253731 A EP 04253731A EP 1496309 A2 EP1496309 A2 EP 1496309A2
Authority
EP
European Patent Office
Prior art keywords
side face
burner
gas
gas burner
circular
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.)
Withdrawn
Application number
EP04253731A
Other languages
English (en)
French (fr)
Other versions
EP1496309A3 (de
Inventor
Robert William Tanner Parsons
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.)
Aeromatix Ltd
Original Assignee
Aeromatix 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 Aeromatix Ltd filed Critical Aeromatix Ltd
Publication of EP1496309A2 publication Critical patent/EP1496309A2/de
Publication of EP1496309A3 publication Critical patent/EP1496309A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • F24H1/43—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes helically or spirally coiled
    • 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
    • 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
    • F23D14/70—Baffles or like flow-disturbing devices
    • 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
    • F23D2203/1023—Flame diffusing means using perforated plates with specific free passage areas
    • 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

Definitions

  • the invention relates to a gas burner and particularly but not exclusively to a gas burner for use in a domestic heating appliance.
  • the burner may be of the "premix" type, meaning that all the air required for complete combustion is mixed with the fuel gas prior to burning.
  • a conventional domestic heating boiler includes a flat, rectangular gas burner positioned below a flat, rectangular heat exchanger, the distance between the burner and the heat exchanger being sufficient to ensure that the combustion process is complete before the products of combustion are cooled by the heat exchanger. This configuration results in unwanted heat losses through the boundaries of this combustion space, unless these boundaries are water cooled as part of the heat exchanger.
  • An improvement of the above arrangement has been provided by using a cylindrical burner positioned axially within a cylindrical heat exchanger including hollow coils, carrying water. This eliminates many of the above losses, although some heat loss does occur at the circular ends of the cylindrical combustion space.
  • Conventional burners for the above arrangement include a cylindrical wall defining a central cavity for receiving the gas and air mixture. The cylindrical wall surrounding the cavity is provided with through holes which act as flame ports through which the gas and air mixture may pass for combustion.
  • Such a burner would conventionally be made of metal, usually stainless steel. The burner would be mounted on a die cast front plate and connected to a fan via a two piece die cast inlet duct.
  • a gas burner adapted for use with a cylindrical heat exchanger having a substantially circular inlet aperture, the burner including:
  • the ceramic burner head preferably includes a planar circular entry side face and a planar circular exit side face.
  • the thickness of the burner head may be between 10mm and 30mm and is preferably between 10mm and 15mm.
  • the burner head is shaped and sized to substantially close the inlet aperture of the heat exchanger.
  • the burner head preferably includes a plurality of apertures extending from the entry side face to the exit side face, the gas and air mixture being able to pass through the apertures.
  • the apertures are preferably between 0.5mm and 1.5mm in diameter and spaced about 2 to 3mm apart.
  • the baffle plate is preferably generally planar and circular and the orifices may be between 1 mm and 2mm in diameter.
  • the baffle plate may be spaced between 1 mm and 3mm from the entry side face of the burner head.
  • the body member may include a generally circular closure part, which preferably includes a rim portion around its perimeter, for connecting to a rim portion around the perimeter of the circular inlet of the heat exchanger.
  • the gas burner may further include a ring shaped gasket for positioning between the respective rims of the body member and the inlet of the heat exchanger.
  • the means for introducing the gas and air mixture to the burner head may include an elongate inlet duct, which preferably forms part of the body member.
  • the closure part and the inlet duct of the body member are formed as a single unitary component.
  • the body member may be die cast.
  • the burner may further include a closure plate for closing a back of the inlet duct.
  • a cylindrical heat exchanger having a circular inlet aperture and including a burner according to any of the preceding definitions, the burner being located so as to substantially close the inlet duct.
  • a heat exchanger 10 is generally cylindrical, including a plurality of coils 12.
  • the coils may be of cylindrical or oval cross section and carry water which absorbs heat from a combustion chamber 14 located within the cylinder defined by the coils.
  • the combustion chamber 14 is conventionally heated by means of a gas burner including a cylindrical stainless steel burner head 16 which locates within the combustion chamber 14, concentric with and spaced from the coils 12.
  • a circular inlet 18 of the heat exchanger 10 is closed by a metallic burner mounting plate (not illustrated). Heat losses can occur through the burner mounting plate, which can also become excessively hot.
  • a gas burner 22 according to one embodiment of the invention.
  • the gas burner 22 does not fit inside the cylindrical combustion chamber 14, but rather fits over the circular inlet 18.
  • the gas burner 22 includes a burner head 24 which is circular in plan view, as viewed in the axial direction of the heat exchanger in use.
  • the burner head 24 has a planar circular entry side face 26 and a planar circular exit side face 28.
  • a cylindrical edge 30 joins the two faces 26 and 28.
  • the burner head 24 is made of a ceramic material, and is provided with a plurality of orifices 32 which act as flame ports (just a few of which are shown in Fig. 2).
  • the flame ports extend through the burner head 24 from the entry side face 26 to the exit side face 28.
  • the diameter of the flame ports 32 is around 1.2mm and they are spaced about 2 to 3mm apart.
  • the baffle member 34 Located adjacent to the entry side face 26 of the burner head 24 is a baffle member 34.
  • the baffle member 34 includes a generally circular planar baffle plate 36 and a cylindrical lip 38 which stands out of the plane of the baffle plate 36 and extends from its perimeter at right angles to the baffle plate.
  • the lip 38 fits around the cylindrical edge 30 of the burner head 24.
  • the lip 38 is provided with a small shoulder 39 on which the burner head 24 locates, this resulting in the entry side face 26 of the burner head 24 being spaced a small distance from the baffle plate 36.
  • the distance may be between 1 and 3mm.
  • the baffle plate 36 is provided with a plurality of holes 37 passing therethrough.
  • the holes have a diameter of about 1-3mm and are located about 4mm to 6mm apart.
  • the gas burner 22 further includes a body member 40 which includes a generally circular closure part 41 having a generally cylindrical rim 42 at its outer perimeter.
  • the body member 40 further includes an inlet duct 44 communicating with the closure part 41, for connecting to a fan (not shown) via a fan mounting plate 46.
  • the fan mounting features may be rotated to accommodate different angular orientations of the burner.
  • the body member 40 is a unitary component which may be die cast.
  • a small closure plate 48 is provided for closing an outer side of the duct 44.
  • the gas burner 22 further includes a ring shaped gasket 49, of a resilient material.
  • the rim 42 of the body member 40 is affixed by screws or other fixing means to a complementary shaped rim 50 defined around a perimeter of the circular inlet 18 of the combustion chamber 14 (see Fig. 1).
  • the gasket 49 locates between the respective rims, ensuring an airtight seal.
  • the burner head 24 and the baffle member 34 are accommodated within the closure part 41 of the body member 40, thereby closing the circular inlet 18.
  • the baffle plate 36 in this position is parallel to and spaced slightly from the entry side face 26 of the burner head 24.
  • a premix of gas and air is forced by the fan through the inlet duct 44 of the body member 40, through the holes 37 in the baffle plate 36 and then through the flame ports 32 in the burner head 24, to burn on exiting the exit side face 28 of the burner head 24.
  • the holes 37 in the baffle plate 36 create regions of different pressures of the gas and air mixture at the entry side face 26 of the burner head 24. The high pressure regions result in the establishment of main flames, while the low pressure regions establish smaller flames which retain the main flames on the burner.
  • the ceramic burner head 24 can tolerate temperatures of up to around 1200°C as compared to abut 600°C for conventional stainless steels. This means that combustion can occur in a richer condition and without damage to the burner. This provides greater versatility for the burner.
  • the circular burner head 24 entirely occupies the circular inlet of the heat exchanger, and because of the low thermal conductivity of ceramics, the very high combustion temperatures can be contained. This prevents the heating of adjacent components with the associated safety and efficiency implications. This helps to achieve the levels of efficiency necessary for modern "condensing" boilers.
  • Ceramics also have very low thermal expansion coefficient as compared to stainless steel and this avoids the high fatigue stresses which can be associated with the cyclic operation of steel burners.
  • the inventors have realised that the circular burner head described above is at least as efficient as a cylindrical burner, when used with a cylindrical heat exchanger. Further, a single design of cylindrical burner is able to meet the heat input requirements of a range of different domestic boilers. Many cylindrical heat exchangers are modular, with additional coils being added as the heat output requirement increases, and the prior art cylindrical burners are required to be of different lengths as appropriate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Gas Burners (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP04253731A 2003-07-08 2004-06-22 Gasbrenner Withdrawn EP1496309A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0315891 2003-07-08
GB0315891A GB2403792A (en) 2003-07-08 2003-07-08 Gas burner for use with a cylindrical heat exchanger

Publications (2)

Publication Number Publication Date
EP1496309A2 true EP1496309A2 (de) 2005-01-12
EP1496309A3 EP1496309A3 (de) 2006-06-14

Family

ID=27741732

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04253731A Withdrawn EP1496309A3 (de) 2003-07-08 2004-06-22 Gasbrenner

Country Status (2)

Country Link
EP (1) EP1496309A3 (de)
GB (1) GB2403792A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2051006A1 (de) * 2007-10-19 2009-04-22 Truma Gerätetechnik GmbH & Co. KG Heizgerät
JP2011196556A (ja) * 2010-03-17 2011-10-06 Rinnai Corp ボイラ用プレート式バーナ

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108826687B (zh) * 2018-05-10 2023-08-01 宁波市哈雷换热设备有限公司 一种全预混冷凝式换热装置

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB148611A (en) * 1919-04-22 1920-07-22 David Victor Tod Improved gas heated boiler
JPS591943A (ja) * 1982-06-25 1984-01-07 Hitachi Ltd 液体加熱器
GB2231949A (en) * 1989-05-26 1990-11-28 Burco Dean Appliances Ltd Gas burner
EP0472270A1 (de) * 1990-06-21 1992-02-26 Furigas (U.K.) Limited Gasbrenner
EP0498748A1 (de) * 1991-02-07 1992-08-12 De Dietrich Thermique Gasbeheizter gusseisener Gliederheizkessel mit totaler Vormischung
US5240411A (en) * 1992-02-10 1993-08-31 Mor-Flo Industries, Inc. Atmospheric gas burner assembly
US5511516A (en) * 1993-08-27 1996-04-30 Sabh (U.S.) Water Heater Group, Inc. Water heater with low NOx ceramic burner
DE19723367C1 (de) * 1997-06-04 1998-11-05 Buderus Heiztechnik Gmbh Brenner für einen gasförmigen Brennstoff
EP0905457A2 (de) * 1997-09-29 1999-03-31 FERROLI S.p.A. Kombinierter Brennwertkessel mit Vormischbrenner
DE20314241U1 (de) * 2003-09-13 2003-12-18 Schott Glas Heißwassergerät mit Gasbrenner

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4224019A (en) * 1978-02-27 1980-09-23 Westinghouse Electric Corp. Power burner for compact furnace
FR2589555B1 (fr) * 1985-11-06 1989-11-10 Gaz De France Bruleur a gaz a air souffle
DE4129552A1 (de) * 1991-09-05 1993-03-11 Kreis Truma Geraetebau Gasbrenner, insbesondere fuer fluessiggas
US5494003A (en) * 1994-09-01 1996-02-27 Alzeta Corporation Water heater with perforated ceramic plate infrared burner

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB148611A (en) * 1919-04-22 1920-07-22 David Victor Tod Improved gas heated boiler
JPS591943A (ja) * 1982-06-25 1984-01-07 Hitachi Ltd 液体加熱器
GB2231949A (en) * 1989-05-26 1990-11-28 Burco Dean Appliances Ltd Gas burner
EP0472270A1 (de) * 1990-06-21 1992-02-26 Furigas (U.K.) Limited Gasbrenner
EP0498748A1 (de) * 1991-02-07 1992-08-12 De Dietrich Thermique Gasbeheizter gusseisener Gliederheizkessel mit totaler Vormischung
US5240411A (en) * 1992-02-10 1993-08-31 Mor-Flo Industries, Inc. Atmospheric gas burner assembly
US5511516A (en) * 1993-08-27 1996-04-30 Sabh (U.S.) Water Heater Group, Inc. Water heater with low NOx ceramic burner
DE19723367C1 (de) * 1997-06-04 1998-11-05 Buderus Heiztechnik Gmbh Brenner für einen gasförmigen Brennstoff
EP0905457A2 (de) * 1997-09-29 1999-03-31 FERROLI S.p.A. Kombinierter Brennwertkessel mit Vormischbrenner
DE20314241U1 (de) * 2003-09-13 2003-12-18 Schott Glas Heißwassergerät mit Gasbrenner

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 083 (M-290), 17 April 1984 (1984-04-17) & JP 59 001943 A (HITACHI SEISAKUSHO KK), 7 January 1984 (1984-01-07) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2051006A1 (de) * 2007-10-19 2009-04-22 Truma Gerätetechnik GmbH & Co. KG Heizgerät
JP2011196556A (ja) * 2010-03-17 2011-10-06 Rinnai Corp ボイラ用プレート式バーナ

Also Published As

Publication number Publication date
GB2403792A (en) 2005-01-12
GB0315891D0 (en) 2003-08-13
EP1496309A3 (de) 2006-06-14

Similar Documents

Publication Publication Date Title
US9982888B2 (en) Inner swirling flame gas burner
US10697668B2 (en) Flue baffle
US10544961B2 (en) Premix burner internal flue shield
RU2011140497A (ru) Дверца с встроенной горелкой для нагревательного прибора
EP2087295A2 (de) Kessel mit einem brennkopf-kühlsystem
US20210088211A1 (en) Inward fired low nox premix burner
CA3017553C (en) Burner box liner for low nox emission furnace
US20190331337A1 (en) Gas burner and hob comprising a gas burner
JP4453907B2 (ja) ガスコンロ
EP1496309A2 (de) Gasbrenner
KR20190081207A (ko) 연관식 보일러
ATE396367T1 (de) Brenner, insbesondere venturibrenner, mit einem brennkammerrohr
JP2002536616A (ja) 暖房及び冷凍機械、特にブイルゥミアのヒートポンプ又はスターリング機械
EP2083217B1 (de) Gasbrenner für einen Kessel
US10520221B2 (en) Refractory for heating system
GB2316479A (en) Gas burner
JPH0531486Y2 (de)
CN217031617U (zh) 一种燃气燃烧换热装置、燃气热水器及壁挂炉
CN211781251U (zh) 一种分块式结构的燃气灶
KR200360994Y1 (ko) 가스복사 조리기용 버너 어셈블리
KR200386287Y1 (ko) 튜브형 원적외선 히터
EP1498658A1 (de) Gasbrenner
US20060057531A1 (en) Gas-fired heating unit
JPH04359704A (ja) 燃焼装置
KR910006677Y1 (ko) 탕비기

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL HR LT LV MK

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL HR LT LV MK

17P Request for examination filed

Effective date: 20061027

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20070627