EP0043232A1 - A liquid heater and a gas burner therefor - Google Patents
A liquid heater and a gas burner therefor Download PDFInfo
- 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- Withdrawn
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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
- F24H1/18—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)
- Gas Burners (AREA)
Abstract
A liquid heater such as a domestic hot water heater which comprises a vessel (4), means defining a chamber (18) beneath the vessel, said chamber having a constricted outlet (44), and a gas burner assembly (26, 28) which in operation discharges combustion gases into the chamber at a sufficient pressure to force the combustion gases through said constricted outlet. Also disclosed is a gas burner (28) which is formed with a multiplicity of radially directed flutes (76) and between which are formed passages for secondary air.
Description
- 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.
- In gas fired liquid heaters, it is usually necessary to include an unimpeded flue path for combustion products to ensure reliable combustion of the gas. Unfortunately, considerable heat energy is lost through the flue path directly by the combustion gases. Heat is also lost indirectly when the gas burner is not operating by convection currents which cause heat to be lost from the hot water. Normally, it is not possible to reduce the size of the flue outlet or form the flue in a tortuous path or in a path in which the combustion gases must travel in a downward direction since a normal gas burner will not produce enough pressure to force the combustion products through the flue unless assisted by a fan. The general object of the present invention is to avoid the drawback noted above by providing new combustion arrangements which operate at relatively high pressure and so can force the combustion products through a constricted flue outlet.
- More specifically, 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.
- Preferably, 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 invention will now be more fully described with reference to the accompanying drawings, in which:
- Figure 1 is a cross section through a preferred embodiment of the invention,
- Figure 2 is a cross section along the line 2-2,
- Figure 3 is a plan view of the gas burner of the: invention, and
- Figure 4 is a sectional view taken along the line 4-4.
- The liquid heating device of the invention comprises an
outer housing 2 which is of generally rectangular cross section, as seen in Figure 2. Located within the housing is apressure vessel 4 . havingcylindrical sidewall 6, a convex top 8 andconcave bottom 10. The upper part of thesidewalls 6 and the top 8 are covered with alayer 12 of insulating material. Thevessel 4 has acold water inlet 14 and ahot water outlet 16 located near the bottom and top respectively of the vessel. - Located beneath the
bottom 10 of the vessel is achamber 18 which is defined in part by theconcave bottom 10 of the vessel, anannular plate 20 and thelower portion 22 of a cylindricalintermediate wall 24. The inner periphery of theannular plate 20 is connected to atubular member 26 which is open at both ends. Aburner 28 is located just below the open end of thetubular member 26 and is arranged to produce an annular ring offlames 30 adjacent to the inner surface of themember 26. Theburner 28 is fed with gas from ajet 32, the supply of gas thereto being controlled by agas regulator 34 which is of standard form. Theburner 28 also includes apilot 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 thetubular member 26 where theburner 28 is located; secondly, atortuous flue path 40 and thirdly relativelysmall condensation outlet 42. Theflue path 40 comprises a first annularupward leg 44 which is defined between thesidewall 6 of the vessel and theintermediate wall 24. Thecylindrical sidewall 24 may comprise a sheet metal inner wall, insulating material and a metal foil outer wall. Thefirst leg 44 connects to a second downwardly extendingleg 46 which is defined between the outer wall of theintermediate wall 24 and asheet metal wall 48. Thewall 48 is clad withinsulating material 50. - The
second leg 46 terminates in anoutlet register 52 which opens into aduct 54 which extends upwardly and terminates in abalanced flue 56. As best seen in Figure 2, theduct 54 is located in one of the four corner spaces left within thehousing 2 by the cylindrical vessel. Thehousing 2 includesair inlet openings 58 located adjacent to theflue 56 air from theopenings 58 being free to move down towards theburner 28 in the free spaces defined between the housing and the vessel. As will be described shortly, theburner 28 has acentral 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. When the
burner 28 is operating, the products of combustion are discharged into thechamber 18 where heat transfer to thebottom 10 andsidewalls 6 of the vessel takes place. Additionally, theflames 30 of the burner raise the temperature of thetubular member 26 which in use preferably glows red hot. Themember 26 tends to maintain the high temperature of the combustion gases and constrain them to move in a generally vertical direction. Themember 26 could be regarded as functioning like a short hot flue. The combined effect ofburner 28 and the hottubular member 26 increase the pressure within thechamber 18 to a sufficient extent that the products of combustion are forced through the tortuous flue path 40.which includes thedownward 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 thefirst leg 44 of thepath 40, as well as through thebottom 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 thewater vessel 4 and when theburner 28 is not operating, thetortuous flue path 40 substantially prevents any flow of convection currents through theflue path 40, the hot gases being trapped in thetransition region 45 between thefirst leg 44 and thesecond leg 46 of the flue path. In fact, the arrangement is so efficient that thepilot 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 theflue 56 and from thehousing 2. - Figures 3 and 4 illustrate the
burner 28 of the invention. The burner has an annular base wall 64 formed with anupturned lip 68 on its inner periphery. The outer periphery of the base is formed into acylindrical wall 70 which steps inwardly to a reduced diameter upper portion 72.--The burner includes asheet metal member 74 which is folded so as to have a plurality of radially inwardly extendingflutes 76. Those portions of themember 74 which do not form theflutes 76 lie adjacent to the reduceddiameter portion 72 of the sidewalls of the burner. Themember 74 rests on anannular gasket 75. Gas is supplied to theburner 28 via asupply pipe 78 and circulates about the burner through thetoroidal chamber 77 formed between thesidewalls 70 and themember 74. The gas then flows in a generally vertical direction and issues from the upper parts of theflutes 76. When the burner is operating, secondary air is drawn from the outer periphery of the burner and through thecentral 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. As seen in Figure 3 thepilot 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. In that arrangement the
tube member 26 was constructed of stainless steel and approximately 120mm in width 150mm in length and its top located about 50mm from theconcave bottom 10 of the vessel. Thefirst leg 44 of the flue path was about 500mm in axial length and approximately 8mm in width whereas thesecond leg 46 was approximately 20mm in width. The pressure within thechamber 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. - Many modifications will be apparent to those skilled in the art without departing from the spirit and scope of the invention. For instance, the
duct 54 could be omitted and theregister 52 open directly to atmosphere.
Claims (15)
1. A gas fired liquid heater comprising a vessel (4), means defining a chamber (18) beneath the vessel, said chamber having a constricted outlet (44), and a gas burner assembly (26, 28) characterised in that the gas burner assembly in operation discharges combustion gases into the chamber at a sufficient pressure to force the combustion gases through said constricted outlet.
2. A heater as claimed in Claim 1 wherein the outlet opens to a flue path which includes first and second legs (44, 46) characterised in that the arrangement is such that in operation the combustion gases move upwardly in the first leg and downwardly in the second leg.
3. A heater as claimed in Claim 1 or 2 wherein the gas burner assembly includes a gas burner (28) and a tubular member (26) characterised in that the tubular member extends into the chamber and in that, in operation, flames (30) from the gas burner heat said tubular member to an elevated temperature.
4. A heater as claimed in Claim 3 wherein said .tubular member functions as a short hot flue.
5. A heater as claimed in Claim 2 or 3 wherein the burner includes combustible gas outlet means (72, 74) characterised in that the gas outlet means produces an annular ring of flame, said ring of flame being located adjacent to the inner wall of said tubular member.
6. A heater as claimed in Claim 2, 3 or 4 characterised in that said tubular member is made from stainless steel.
7. A heater as claimed in any preceding claim wherein the vessel has a bottom wall (10) characterised in that said bottom wall defines the upper periphery of the chamber.
8. A heater as claimed in Claim 7 characterised in that the vessel includes a sidewall (6) which defines part of the first leg (44) of said flue path.
9. A heater as claimed in Claim 8 characterised in that the vessel is cylindrical and includes a layer (24) of insulation between the first leg and the second leg of said flue path.
10. A heater as claimed in Claims 7, 8 or 9 characterised by the provision of a balanced flue (56) located at the end of said flue path.
11. A heater as claimed in Claim 10 wherein the vessel is located in a housing (2) which is generally rectangular in cross section, characterised in that the balanced flue is located near one corner of the housing, said flue path including a third leg (54), which extends upwardly from an outlet of the second leg to the balanced flue.
12. A heater as claimed in Claim 5 characterised in that the combustible gas outlet means includes a ring of gas openings and upwardly extending air passages between adjacent openings.
13. A heater as claimed in Claim 12 wherein the burner has an annular base (66), and outer sidewall (70, 72) extending upwardly from the base and an inner sidewall (74), extending upwardly from the inner periphery of the base, characterised in that the inner sidewall is formed with an array of radially directed flutes (76) and interposed wall portions which lie adjacent to an upper part (72) of outer sidewall whereby each of said gas openings is defined by the upper edge of said flutes and a portion of the upper edge of said outer sidewall.
14. A heater as claimed in Claim 13 characterised in that the lower part (70) of the outer sidewall is of wider diameter than the upper part (72), the lower part, together with the base and lower part of the inner sidewall (74) defining a generally toroidal gas supply passage-(77).
15. A gas burner comprising an annular base (66), an outer sidewall (70, 72) extending upwardly from the outer periphery of the base and an inner sidewall (74), extending upwardly from the inner periphery of the base characterised in that said inner sidewall is formed with an array of inwardly directed flutes (76) and interposed wall portions which lie adjacent to an upper part (72) 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.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU425680 | 1980-06-27 | ||
AU4256/80 | 1980-06-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0043232A1 true EP0043232A1 (en) | 1982-01-06 |
Family
ID=3694700
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81302847A Withdrawn EP0043232A1 (en) | 1980-06-27 | 1981-06-24 | A liquid heater and a gas burner therefor |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0043232A1 (en) |
JP (1) | JPS5741535A (en) |
AU (1) | AU517176B3 (en) |
Cited By (4)
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 (en) * | 2011-08-29 | 2012-01-04 | 重庆三温暖电气有限公司 | Volume type gas water heater |
Families Citing this family (1)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1618735A (en) * | 1925-12-18 | 1927-02-22 | John W Storey | Water heater |
DE527194C (en) * | 1928-05-05 | 1931-06-15 | Robert Von Linde Dipl Ing | Oil vapor burner for liquid fuels |
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 (en) * | 1965-06-17 | 1966-07-29 | Cie Thermor Sa | Improvements to gas-fired water heaters |
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4842127B1 (en) * | 1968-08-14 | 1973-12-11 | ||
JPS4721693U (en) * | 1971-03-14 | 1972-11-10 | ||
JPS4992637A (en) * | 1973-01-08 | 1974-09-04 | ||
LU68192A1 (en) * | 1973-08-09 | 1973-10-16 | ||
JPS54606Y2 (en) * | 1974-09-19 | 1979-01-12 | ||
JPS5220458A (en) * | 1975-08-11 | 1977-02-16 | Noboru Maruyama | Liquid heating apparatus |
JPS594504B2 (en) * | 1976-10-29 | 1984-01-30 | 松下電器産業株式会社 | liquid fuel combustion tube |
-
1981
- 1981-06-22 AU AU72064/81A patent/AU517176B3/en not_active Ceased
- 1981-06-24 EP EP81302847A patent/EP0043232A1/en not_active Withdrawn
- 1981-06-26 JP JP10037181A patent/JPS5741535A/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1618735A (en) * | 1925-12-18 | 1927-02-22 | John W Storey | Water heater |
DE527194C (en) * | 1928-05-05 | 1931-06-15 | Robert Von Linde Dipl Ing | Oil vapor burner for liquid fuels |
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 (en) * | 1965-06-17 | 1966-07-29 | Cie Thermor Sa | Improvements to gas-fired water heaters |
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)
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 (en) * | 2011-08-29 | 2012-01-04 | 重庆三温暖电气有限公司 | Volume type gas water heater |
Also Published As
Publication number | Publication date |
---|---|
AU517176B3 (en) | 1981-09-24 |
JPS5741535A (en) | 1982-03-08 |
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Date | Code | Title | Description |
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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 |
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17P | Request for examination filed |
Effective date: 19820503 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
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18W | Application withdrawn |
Withdrawal date: 19831121 |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: TRIHEY, JOHN MASSEY |