EP0043232A1 - Chaudière à fluide et brûleur pour cette chaudière - Google Patents

Chaudière à fluide et brûleur pour cette chaudière Download PDF

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Publication number
EP0043232A1
EP0043232A1 EP81302847A EP81302847A EP0043232A1 EP 0043232 A1 EP0043232 A1 EP 0043232A1 EP 81302847 A EP81302847 A EP 81302847A EP 81302847 A EP81302847 A EP 81302847A EP 0043232 A1 EP0043232 A1 EP 0043232A1
Authority
EP
European Patent Office
Prior art keywords
heater
gas
vessel
flue
burner
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Withdrawn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
EP81302847A
Other languages
German (de)
English (en)
Inventor
John Massey Trihey
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.)
Vulcan Australia Ltd
Original Assignee
Vulcan Australia 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 Vulcan Australia Ltd filed Critical Vulcan Australia Ltd
Publication of EP0043232A1 publication Critical patent/EP0043232A1/fr
Withdrawn legal-status Critical Current

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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
    • F24H1/18—Water-storage heaters
    • F24H1/186—Water-storage heaters using fluid fuel
    • 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
    • F23D14/08—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 axial outlets at the burner head
    • F23D14/085—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 axial outlets at the burner head with injector axis inclined to the burner head axis
    • 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
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
    • F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
    • F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel

Definitions

  • This invention relates to a liquid heating device especially, but not exclusively, a domestic water heater.
  • the invention also relates to a novel form of gas burner for use in the heater.
  • the invention provides a gas fired liquid heater comprising a vessel, means defining a chamber beneath the vessel, said chamber having a constricted outlet, and a gas burner assembly which in operation discharges combustion gases into the chamber at a sufficient pressure to force the combustion gases through said constricted outlet.
  • the gas burner assembly includes a gas burner and a tubular member which extends into the chamber, the arrangement being such that in operation flames from the gas burner heat said tubular member to an elevated temperature.
  • the invention' also provides a gas burner comprising an annular base, an outer sidewall extending upwardly from the outer periphery of the base, and an inner sidewall extending upwardly from the inner periphery of the base, said inner sidewall being formed with an array of inwardly directed flutes and interposed wall portions which lie adjacent to an upper part of the outer sidewall, whereby said burner has a ring of gas openings defined by the upper edges of the flutes and by parts of the upper edge of said outer sidewall, there being air passages between adjacent flutes.
  • the liquid heating device of the invention comprises an outer housing 2 which is of generally rectangular cross section, as seen in Figure 2.
  • a pressure vessel 4 Located within the housing is a pressure vessel 4 . having cylindrical sidewall 6, a convex top 8 and concave bottom 10. The upper part of the sidewalls 6 and the top 8 are covered with a layer 12 of insulating material.
  • the vessel 4 has a cold water inlet 14 and a hot water outlet 16 located near the bottom and top respectively of the vessel.
  • a chamber 18 which is defined in part by the concave bottom 10 of the vessel, an annular plate 20 and the lower portion 22 of a cylindrical intermediate wall 24.
  • the inner periphery of the annular plate 20 is connected to a tubular member 26 which is open at both ends.
  • a burner 28 is located just below the open end of the tubular member 26 and is arranged to produce an annular ring of flames 30 adjacent to the inner surface of the member 26.
  • the burner 28 is fed with gas from a jet 32, the supply of gas thereto being controlled by a gas regulator 34 which is of standard form.
  • the burner 28 also includes a pilot burner assembly 36 which is also of standard form, and includes a pilot burner thermocouple and sparking electrodes.
  • the chamber 18 is closed except for the following openings: first, the opening at the lower end of the tubular member 26 where the burner 28 is located; secondly, a tortuous flue path 40 and thirdly relatively small condensation outlet 42.
  • the flue path 40 comprises a first annular upward leg 44 which is defined between the sidewall 6 of the vessel and the intermediate wall 24.
  • the cylindrical sidewall 24 may comprise a sheet metal inner wall, insulating material and a metal foil outer wall.
  • the first leg 44 connects to a second downwardly extending leg 46 which is defined between the outer wall of the intermediate wall 24 and a sheet metal wall 48.
  • the wall 48 is clad with insulating material 50.
  • the second leg 46 terminates in an outlet register 52 which opens into a duct 54 which extends upwardly and terminates in a balanced flue 56.
  • the duct 54 is located in one of the four corner spaces left within the housing 2 by the cylindrical vessel.
  • the housing 2 includes air inlet openings 58 located adjacent to the flue 56 air from the openings 58 being free to move down towards the burner 28 in the free spaces defined between the housing and the vessel.
  • the burner 28 has a central opening 60 which serves as an opening for a substantial part of the secondary air inlet for combustion.
  • the operation of the heater is as follows.
  • the burner 28 When the burner 28 is operating, the products of combustion are discharged into the chamber 18 where heat transfer to the bottom 10 and sidewalls 6 of the vessel takes place. Additionally, the flames 30 of the burner raise the temperature of the tubular member 26 which in use preferably glows red hot.
  • the member 26 tends to maintain the high temperature of the combustion gases and constrain them to move in a generally vertical direction.
  • the member 26 could be regarded as functioning like a short hot flue.
  • the combined effect of burner 28 and the hot tubular member 26 increase the pressure within the chamber 18 to a sufficient extent that the products of combustion are forced through the tortuous flue path 40.which includes the downward leg 46. It will be noted that heat transfer directly to the sidewalls of the vessel can take place as the combustion products pass through the first leg 44 of the path 40, as well as through the bottom 10.
  • the liquid heater defined above has been found to be very efficient in that when the burner 28 is operating there is a relatively large surface area available for heat transfer to the water vessel 4 and when the burner 28 is not operating, the tortuous flue path 40 substantially prevents any flow of convection currents through the flue path 40, the hot gases being trapped in the transition region 45 between the first leg 44 and the second leg 46 of the flue path.
  • the arrangement is so efficient that the pilot tube 36 can be adjusted so that it can make up the heat losses which would be due to the very small loss which occurs from the flue 56 and from the housing 2.
  • FIGs 3 and 4 illustrate the burner 28 of the invention.
  • the burner has an annular base wall 64 formed with an upturned lip 68 on its inner periphery.
  • the outer periphery of the base is formed into a cylindrical wall 70 which steps inwardly to a reduced diameter upper portion 72.
  • the burner includes a sheet metal member 74 which is folded so as to have a plurality of radially inwardly extending flutes 76. Those portions of the member 74 which do not form the flutes 76 lie adjacent to the reduced diameter portion 72 of the sidewalls of the burner.
  • the member 74 rests on an annular gasket 75.
  • Gas is supplied to the burner 28 via a supply pipe 78 and circulates about the burner through the toroidal chamber 77 formed between the sidewalls 70 and the member 74.
  • the gas then flows in a generally vertical direction and issues from the upper parts of the flutes 76.
  • secondary air is drawn from the outer periphery of the burner and through the central opening 60 of the burner and is then free to pass into the spaces between adjacent flutes thereby enabling very efficient combustion to take place.
  • the pilot assembly 36 partially obstructs the opening 60, thus assisting in maintaining the chamber at a higher pressure when the main burner is operating.
  • a prototype of the invention has been tested and found to perform in a very efficient manner.
  • the prototype included a vessel which was approximately 380mm in diameter.
  • the tube member 26 was constructed of stainless steel and approximately 120mm in width 150mm in length and its top located about 50mm from the concave bottom 10 of the vessel.
  • the first leg 44 of the flue path was about 500mm in axial length and approximately 8mm in width whereas the second leg 46 was approximately 20mm in width.
  • the pressure within the chamber 18 was measured to be about 0.015 inches of water gauge above the air pressure within the housing when the'burner 28 was operating at 25 mj input.

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)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Gas Burners (AREA)
EP81302847A 1980-06-27 1981-06-24 Chaudière à fluide et brûleur pour cette chaudière Withdrawn EP0043232A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU4256/80 1980-06-27
AU425680 1980-06-27

Publications (1)

Publication Number Publication Date
EP0043232A1 true EP0043232A1 (fr) 1982-01-06

Family

ID=3694700

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81302847A Withdrawn EP0043232A1 (fr) 1980-06-27 1981-06-24 Chaudière à fluide et brûleur pour cette chaudière

Country Status (3)

Country Link
EP (1) EP0043232A1 (fr)
JP (1) JPS5741535A (fr)
AU (1) AU517176B3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2207740A (en) * 1987-06-19 1989-02-08 Geoffrey Lund Finney Indirect liquid heating system
GB2315319A (en) * 1996-07-15 1998-01-28 Aqua Max Pty Ltd Water heater and gas burner therefor
US7337753B2 (en) 2004-04-05 2008-03-04 Aqua Max Pty Ltd. Water heater
CN102305469A (zh) * 2011-08-29 2012-01-04 重庆三温暖电气有限公司 容积式燃气热水器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ218621A (en) * 1986-12-12 1990-03-27 Rheem Australia Pty Ltd Flue arrangement for flame heated liquid storage tank

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1618735A (en) * 1925-12-18 1927-02-22 John W Storey Water heater
DE527194C (de) * 1928-05-05 1931-06-15 Robert Von Linde Dipl Ing OEldampfbrenner fuer fluessige Brennstoffe
US2487705A (en) * 1944-10-25 1949-11-08 Harold E Handley Water heater
US2610675A (en) * 1950-11-16 1952-09-16 C A Olsen Mfg Company Flame retaining atmospheric gas burner
FR1447396A (fr) * 1965-06-17 1966-07-29 Cie Thermor Sa Perfectionnements aux chauffe-eau fonctionnant au gaz
CA901414A (en) * 1969-03-25 1972-05-30 G. Carter Wilfred Water heater
GB2007341A (en) * 1977-10-25 1979-05-16 Mitsubishi Electric Corp Reservoir type water healting device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4842127B1 (fr) * 1968-08-14 1973-12-11
JPS4721693U (fr) * 1971-03-14 1972-11-10
JPS4992637A (fr) * 1973-01-08 1974-09-04
LU68192A1 (fr) * 1973-08-09 1973-10-16
JPS54606Y2 (fr) * 1974-09-19 1979-01-12
JPS5220458A (en) * 1975-08-11 1977-02-16 Noboru Maruyama Liquid heating apparatus
JPS594504B2 (ja) * 1976-10-29 1984-01-30 松下電器産業株式会社 液体燃料燃焼筒

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1618735A (en) * 1925-12-18 1927-02-22 John W Storey Water heater
DE527194C (de) * 1928-05-05 1931-06-15 Robert Von Linde Dipl Ing OEldampfbrenner fuer fluessige Brennstoffe
US2487705A (en) * 1944-10-25 1949-11-08 Harold E Handley Water heater
US2610675A (en) * 1950-11-16 1952-09-16 C A Olsen Mfg Company Flame retaining atmospheric gas burner
FR1447396A (fr) * 1965-06-17 1966-07-29 Cie Thermor Sa Perfectionnements aux chauffe-eau fonctionnant au gaz
CA901414A (en) * 1969-03-25 1972-05-30 G. Carter Wilfred Water heater
GB2007341A (en) * 1977-10-25 1979-05-16 Mitsubishi Electric Corp Reservoir type water healting device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2207740A (en) * 1987-06-19 1989-02-08 Geoffrey Lund Finney Indirect liquid heating system
GB2207740B (en) * 1987-06-19 1991-03-06 Geoffrey Lund Finney Indirect liquid heating system
GB2315319A (en) * 1996-07-15 1998-01-28 Aqua Max Pty Ltd Water heater and gas burner therefor
GB2315319B (en) * 1996-07-15 2000-07-26 Aqua Max Pty Ltd A water heater and gas burner
US7337753B2 (en) 2004-04-05 2008-03-04 Aqua Max Pty Ltd. Water heater
CN102305469A (zh) * 2011-08-29 2012-01-04 重庆三温暖电气有限公司 容积式燃气热水器

Also Published As

Publication number Publication date
AU517176B3 (en) 1981-09-24
JPS5741535A (en) 1982-03-08

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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

Designated state(s): AT BE CH DE FR GB IT NL

17P Request for examination filed

Effective date: 19820503

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

Withdrawal date: 19831121

RIN1 Information on inventor provided before grant (corrected)

Inventor name: TRIHEY, JOHN MASSEY