EP0806616A2 - Sealed wall-hung boiler with reduced size heating parts - Google Patents
Sealed wall-hung boiler with reduced size heating parts Download PDFInfo
- Publication number
- EP0806616A2 EP0806616A2 EP97500054A EP97500054A EP0806616A2 EP 0806616 A2 EP0806616 A2 EP 0806616A2 EP 97500054 A EP97500054 A EP 97500054A EP 97500054 A EP97500054 A EP 97500054A EP 0806616 A2 EP0806616 A2 EP 0806616A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- air
- boiler
- burner
- sealed wall
- hung boiler
- 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
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 8
- 238000002485 combustion reaction Methods 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims 2
- 238000003491 array Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 9
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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
- F24H9/00—Details
- F24H9/0084—Combustion air preheating
- F24H9/0089—Combustion air preheating by double wall boiler mantle
-
- 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
- F24H9/02—Casings; Cover lids; Ornamental panels
-
- 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
- F24H2203/00—** to be deleted **
Definitions
- the present invention relates to a domestic sealed wall-hung boiler, which also supplies instantaneous hot sanitary water and comprises a fan-assisted atmospheric burner, and more particularly relates to the assembly of the burner, the supply of combustion air to the burner and the arrangement of the component parts enclosed in the boiler casing.
- the burner is built with a series of aligned flame distributors with an interlaying separation, where the primary air is mixed with the gas by way of a series of apertures in a continuous plate each facing the corresponding venturi of the respective burner, and the secondary air is brought to the combustion chamber by way of holes adjacent to these mixing apertures.
- the secondary air flow for combustion enters the boiler combustion chamber at high speed from a grille in the base of the burner punched with a specific distribution of holes giving onto the gaps between the flame distributors.
- the subject of the invention is a domestic sealed wall-hung boiler with a compact fan-assisted atmospheric burner, where the whole clean air inflow for combustion is channelled and supplied to the burner by way of its bottom base, comprising:
- the relatively small size of the burner assembly is achieved in combination with a flat conduit for delivering forced draught air at high speed so as to supply all the secondary air needed for combustion drawn through the small base area of the burner, offering the advantage of the reduced width and thickness of all the heating parts and taking up only half the width of the main cavity in the boiler casing, leaving the other side free for the installation of the control devices, and thereby reducing the overall height and depth of the boiler in order to facilitate its housing in a kitchen furniture.
- FIG. 1 is a front view of the sealed wall-hung boiler, which is the object of the invention.
- FIG. 2 is a cross-section on II-II of the figure 1.
- FIG. 3 is a partial view as per figure 2 showing the delivery of air to the boiler burner.
- FIG. 4 is a plan view of the boiler burner.
- FIG. 5 shows a close view of figure 4.
- FIG. 6 is a plan view of the combustion air and fuel gas distribution grille.
- FIG. 7 is an elevational view of the fig. 6 grille.
- FIG. 8 is a profile view of the fig. 6 grille.
- FIG. 9 is a plan view of the exterior air intake diffuser.
- the sealed wall-hung boiler 1 which is the object of the invention comprises a casing 2 enclosing the boiler, in which are arranged the different components of a common sealed boiler, comprising, in ascending order from the bottom to the roof, the control panel 3, which covers the reduced height control unit 4, the gas solenoid valve 5, the gas distribution conduit 6, the atmospheric burner 7, the combustion chamber 8,8', the heat exchanger 9, the spacer box 10 supporting the centrifugal fan 11, the boiler air intake diffuser 12, the exterior clean air inlet 13, and the vent flue 14.
- All the above-listed parts of the boiler 1 are arranged on the right-hand side corresponding to the control knob panel 4, taking up approximately half the width of the main cavity in the casing 2 and leaving the space on the left for the installation of the water circuit 15 components, so that the overall width 34 of the boiler is kept within a standard dimension of 425 mm.
- These common water circuit 15 control components are arranged in a vertical layout and consist, in descending order from top to bottom, of the air pressure switch 16, the three-way valve 17, which changes over the sanitary water and heating circuits 18,19, the secondary exchanger 20, the water pressure switch 21, the water pump 22 and the connectors 23.
- the side column arrangement of components 16 to 23 is achieved in a boiler casing 2, which has a reduced height dimension 35, namely 675 mm compared with the known domestic boilers of a maximum output equal to 20,000 Kcal/h, while the depth dimension 33 of the boiler, equal to 300 mm, is also reduced owing to the fact that the burner 7 has a height 36 of 120 mm, a width 37 of 120 mm and a depth 38 of 120 mm, approximate values that are highly reduced in comparison with the atmospheric burners used in known boilers of the same heat performance and power.
- the combustion chamber 8 is completed vertically, with the supplementary casing 8' cooled by two surrounding pipes to prevent overheating of the exchanger 9.
- the fan spacer box provides a support base for the fan 11 so that it may be withdrawn from the front in the event of its being replaced.
- Figures 2 and 3 show a longitudinal section of the layout of the combustion air supply system. Its delivery flow, comprising both the primary and secondary air supply, is forced by the fan 11 from the air intake diffuser 12 and channelled by way of the flat conduit until reaching the air distribution enclosure 25 b below the burner 7, from where it is split into two branches corresponding to the primary air 41 and the secondary air 42, the former of them mixed with the gas injected by a series of nozzles 6' connected to the gas pipe 6, the mixture being directed to each of the flame distributors 28 by way of the respective venturi 27, and the secondary air 42 distributed to the whole area of the burner 7, for which purpose both the burner and the gas distribution pipe 6 and the air distribution enclosure 25 b are encased by a front cover 31, which at the same time seals the distribution enclosure 25 b .
- the flat air supply conduit 25 runs down the casing 2 attached to the rear wall 32 of the main cavity, occupying a width slightly larger than the width dimension 37 of the burner, and below this it is re-routed in a horizontal direction to form the distribution enclosure 25 b .
- the inflow of clean combustion air along the duct 13 is diffused to the flat conduit by means of a flat diffuser 12, whilst in a second embodiment of the air supply system the air intake diffuser 12 b is covering the fan 11 for cooling purposes.
- the 10 mm thick flame distributors 28 are arranged a certain distance apart in the burner area to form the channels 30, of 4 mm thickness, for ducting the secondary air to the combustion chamber 8.
- the secondary air stream 41 is distributed to the channels 30 from the enclosure 25 b via the grille 29, which, as is shown in figures 6 to 8, is made from a punched plate bent at right angles successively at each of the sides so as to form a base of the burner 7 with three plates 29 a , 29 b , 29 c that make up an intermediate step, where the gas distribution pipe 6 and the nozzles 6' are installed.
- the secondary air 42 flow plate 29 a of a larger area, is provided with a series of holes 43 of 2.5 mm in diameter arrayed in formations away from one another, so that each of them is situated under one of the afore-mentioned ducting channels 30, and it also has three rows of holes 44 of 3.5 mm to 4.5 mm flanking the previous ones, whilst in the secondary air 41 flow plate 29 c , of a smaller area, the holes 45 are 3 mm in diameter. Facing the nozzles 6', the vertical plate 29 b has elongated apertures 46 for the simultaneous inflow of gas and the primary air stream 41 into the venturis 27.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Housings, Intake/Discharge, And Installation Of Fluid Heaters (AREA)
- Gas Burners (AREA)
Abstract
Description
- The present invention relates to a domestic sealed wall-hung boiler, which also supplies instantaneous hot sanitary water and comprises a fan-assisted atmospheric burner, and more particularly relates to the assembly of the burner, the supply of combustion air to the burner and the arrangement of the component parts enclosed in the boiler casing.
- In the boiler described in EP-596555 the burner is built with a series of aligned flame distributors with an interlaying separation, where the primary air is mixed with the gas by way of a series of apertures in a continuous plate each facing the corresponding venturi of the respective burner, and the secondary air is brought to the combustion chamber by way of holes adjacent to these mixing apertures.
- In the JP07269812-A burner the secondary air flow for combustion enters the boiler combustion chamber at high speed from a grille in the base of the burner punched with a specific distribution of holes giving onto the gaps between the flame distributors.
- The subject of the invention is a domestic sealed wall-hung boiler with a compact fan-assisted atmospheric burner, where the whole clean air inflow for combustion is channelled and supplied to the burner by way of its bottom base, comprising:
- a small-sized boiler casing forming a main cavity with no compartments, where space is only taken up by the gas supply solenoid valve and the electronic control unit;
- said burner assembly, which is small-sized and built with a series of flame distributors whose separations form channels for forcing the secondary air at high speed from the base of the burner;
- a flat conduit for the inflow of the clean air needed for combustion, drawn from the fan situated at the top next to the flue conduit, narrowed down to increase the speed of the air and terminated in a sealed distribution enclosure below the burner;
- a grille for the distribution of the amount of air drawn to the burner, which closes its base and forms the roof of this distribution enclosure;
- the heating parts and a fan supporting spacer box characterised by their reduced width and depth, which are housed on one side of the main cavity of the boiler;
- the water circuit control devices, which are housed on the other side of the main cavity;
- said removable rectangular box-shaped fan support, on which the heat-insulated fan is secured, in order to facilitate its removal from the front.
- The relatively small size of the burner assembly is achieved in combination with a flat conduit for delivering forced draught air at high speed so as to supply all the secondary air needed for combustion drawn through the small base area of the burner, offering the advantage of the reduced width and thickness of all the heating parts and taking up only half the width of the main cavity in the boiler casing, leaving the other side free for the installation of the control devices, and thereby reducing the overall height and depth of the boiler in order to facilitate its housing in a kitchen furniture.
- FIG. 1 is a front view of the sealed wall-hung boiler, which is the object of the invention.
- FIG. 2 is a cross-section on II-II of the figure 1.
- FIG. 3 is a partial view as per figure 2 showing the delivery of air to the boiler burner.
- FIG. 4 is a plan view of the boiler burner.
- FIG. 5 shows a close view of figure 4.
- FIG. 6 is a plan view of the combustion air and fuel gas distribution grille.
- FIG. 7 is an elevational view of the fig. 6 grille.
- FIG. 8 is a profile view of the fig. 6 grille.
- FIG. 9 is a plan view of the exterior air intake diffuser.
- With reference to figures 1 to 10, the sealed wall-hung boiler 1 which is the object of the invention comprises a
casing 2 enclosing the boiler, in which are arranged the different components of a common sealed boiler, comprising, in ascending order from the bottom to the roof, thecontrol panel 3, which covers the reducedheight control unit 4, thegas solenoid valve 5, thegas distribution conduit 6, theatmospheric burner 7, thecombustion chamber 8,8', theheat exchanger 9, thespacer box 10 supporting thecentrifugal fan 11, the boilerair intake diffuser 12, the exteriorclean air inlet 13, and thevent flue 14. All the above-listed parts of the boiler 1 are arranged on the right-hand side corresponding to thecontrol knob panel 4, taking up approximately half the width of the main cavity in thecasing 2 and leaving the space on the left for the installation of thewater circuit 15 components, so that theoverall width 34 of the boiler is kept within a standard dimension of 425 mm. - These
common water circuit 15 control components are arranged in a vertical layout and consist, in descending order from top to bottom, of theair pressure switch 16, the three-way valve 17, which changes over the sanitary water andheating circuits secondary exchanger 20, thewater pressure switch 21, thewater pump 22 and theconnectors 23. The side column arrangement ofcomponents 16 to 23 is achieved in aboiler casing 2, which has a reducedheight dimension 35, namely 675 mm compared with the known domestic boilers of a maximum output equal to 20,000 Kcal/h, while thedepth dimension 33 of the boiler, equal to 300 mm, is also reduced owing to the fact that theburner 7 has a height 36 of 120 mm, awidth 37 of 120 mm and adepth 38 of 120 mm, approximate values that are highly reduced in comparison with the atmospheric burners used in known boilers of the same heat performance and power. Thecombustion chamber 8 is completed vertically, with the supplementary casing 8' cooled by two surrounding pipes to prevent overheating of theexchanger 9. Besides preventing fan overheating by means of an insulating layer 10', the fan spacer box provides a support base for thefan 11 so that it may be withdrawn from the front in the event of its being replaced. - Figures 2 and 3 show a longitudinal section of the layout of the combustion air supply system. Its delivery flow, comprising both the primary and secondary air supply, is forced by the
fan 11 from theair intake diffuser 12 and channelled by way of the flat conduit until reaching theair distribution enclosure 25b below theburner 7, from where it is split into two branches corresponding to theprimary air 41 and thesecondary air 42, the former of them mixed with the gas injected by a series of nozzles 6' connected to thegas pipe 6, the mixture being directed to each of theflame distributors 28 by way of therespective venturi 27, and thesecondary air 42 distributed to the whole area of theburner 7, for which purpose both the burner and thegas distribution pipe 6 and theair distribution enclosure 25b are encased by afront cover 31, which at the same time seals thedistribution enclosure 25b. - The flat
air supply conduit 25 runs down thecasing 2 attached to therear wall 32 of the main cavity, occupying a width slightly larger than thewidth dimension 37 of the burner, and below this it is re-routed in a horizontal direction to form thedistribution enclosure 25b. - In a first embodiment of the invention the inflow of clean combustion air along the
duct 13 is diffused to the flat conduit by means of aflat diffuser 12, whilst in a second embodiment of the air supply system theair intake diffuser 12b is covering thefan 11 for cooling purposes. - As shown in figures 3 and 4, the 10 mm
thick flame distributors 28 are arranged a certain distance apart in the burner area to form thechannels 30, of 4 mm thickness, for ducting the secondary air to thecombustion chamber 8. Thesecondary air stream 41 is distributed to thechannels 30 from theenclosure 25b via thegrille 29, which, as is shown in figures 6 to 8, is made from a punched plate bent at right angles successively at each of the sides so as to form a base of theburner 7 with threeplates gas distribution pipe 6 and the nozzles 6' are installed. Thesecondary air 42flow plate 29a, of a larger area, is provided with a series ofholes 43 of 2.5 mm in diameter arrayed in formations away from one another, so that each of them is situated under one of the afore-mentionedducting channels 30, and it also has three rows ofholes 44 of 3.5 mm to 4.5 mm flanking the previous ones, whilst in thesecondary air 41flow plate 29c, of a smaller area, theholes 45 are 3 mm in diameter. Facing the nozzles 6', thevertical plate 29b haselongated apertures 46 for the simultaneous inflow of gas and theprimary air stream 41 into theventuris 27.
Claims (5)
- A domestic sealed wall-hung boiler with a centrifugal fan (11) assisted burner (7), where the clean combustion air is channelled and the whole of the combustion air intake needed, both the primary (41) and the secondary (42), is supplied to the burner (7) by way of a metal grille plate (29) at its base, comprising a boiler casing (2) forming the main housing for the heating parts (6,7,8,8',9), a fan support (10), the gas supply solenoid valve (5), the control unit (4) and the water circuit control devices (16 to 23), the burner (7) being made up of an array of flame distributors (28) separated from one another by the secondary air channels (30), characterised by:said boiler casing (2) being of reduced size with no internal compartments where the heating parts (6,7,8,8',9) are situated on one side of the casing (2) cavity, and the water circuit (15) and its components (16 to 23) are situated on the other side;the fan support (10) is a rectangular box-shaped (10) being removable from the front and heat-insulated;a flat conduit (25) for the clean air intake, which ducts the whole flow (26) of air needed for the combustion from the fan (11) and which terminates in a sealed enclosure (25b), the roof of which is formed by said distribution grille (39);said secondary air stream (42) is forced at high speed, separately from the primary air stream (41), from said grille plate (29) to the channels (30) between the flame distributors (28).
- The sealed wall-hung boiler of claim 1, wherein the heating parts (6,7,8,8',9) are of reduced size (36,37,38), namely 200 mm wide (37), 120 mm deep (38) and 120 mm high (36);
- The sealed wall-hung boiler of claim 1, wherein the afore-mentioned grille (39) is made from a metal plate (29a,29b, 29c) punched with a series of separate arrays of holes (43,44,45), each below one of the secondary air (42) flow channels (30).
- The sealed wall-hung boiler of claim 1, wherein the inflow of clean exterior air via the intake conduit (13) is diffused to the flat conduit (25) ducting the air flow (26) by means of a flat diffuser (12).
- The sealed wall-hung boiler of claim 1, wherein the inflow of clean exterior air via the intake conduit (13) is diffused to the flat conduit (25) ducting the air flow (26) by means of a diffuser (12b) surrounding the fan (11).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES9601064A ES2136495B1 (en) | 1996-05-10 | 1996-05-10 | WATERTIGHT WALL BOILER WITH REDUCED SIZE HEATING ELEMENTS. |
ES9601064 | 1996-05-10 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0806616A2 true EP0806616A2 (en) | 1997-11-12 |
EP0806616A3 EP0806616A3 (en) | 1998-11-18 |
EP0806616B1 EP0806616B1 (en) | 2000-01-05 |
Family
ID=8294794
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19970500054 Expired - Lifetime EP0806616B1 (en) | 1996-05-10 | 1997-03-19 | Sealed wall-hung boiler with reduced size heating parts |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0806616B1 (en) |
DE (1) | DE69701056D1 (en) |
ES (1) | ES2136495B1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1026455A1 (en) * | 1999-02-03 | 2000-08-09 | IABER S.p.A. | Basic boiler combustion chamber |
FR2854229A1 (en) * | 2003-04-25 | 2004-10-29 | Realisation Mecaniques Engenee | Heat exchanger for use in gas boiler, has primary and secondary heat exchanger arranged to transverse flow of hot air towards interstice of exchangers, and duct passing another flow of hot air into secondary exchanger |
EP2390594A3 (en) * | 2010-05-26 | 2015-08-26 | Gealan Formteile GmbH | Device for heating media |
JP2015155773A (en) * | 2014-02-20 | 2015-08-27 | 株式会社ノーリツ | combustion device |
CN112178939A (en) * | 2019-07-05 | 2021-01-05 | 芜湖美的厨卫电器制造有限公司 | Water heating method and device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH428139A (en) * | 1965-12-15 | 1967-01-15 | Rueegg Walter | Heating device with fireplace |
DE2943000A1 (en) * | 1979-10-24 | 1981-05-07 | Okal-Werk Niedersachsen Otto Kreibaum Gmbh & Co Kg, 3216 Salzhemmendorf | Dual gas and solid fuel heating boiler - has separate flues for cascade linked combustion chambers of independently optimal sizes |
DE3338126A1 (en) * | 1983-10-20 | 1985-05-02 | Robert Bosch Gmbh, 7000 Stuttgart | Gas-fired heat exchanger, especially for absorption refrigerators |
DE8716241U1 (en) * | 1987-12-09 | 1988-01-28 | Buderus Heiztechnik GmbH, 6330 Wetzlar | Gas boiler |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3520503B2 (en) * | 1994-02-18 | 2004-04-19 | タカラスタンダード株式会社 | Oil water heater burner unit |
ES1032506Y (en) * | 1995-11-15 | 1996-12-01 | Fagor S Coop | COMPACT APPARATUS OF DOMESTIC HEATING AND REFRIGERATION. |
-
1996
- 1996-05-10 ES ES9601064A patent/ES2136495B1/en not_active Expired - Fee Related
-
1997
- 1997-03-19 EP EP19970500054 patent/EP0806616B1/en not_active Expired - Lifetime
- 1997-03-19 DE DE69701056T patent/DE69701056D1/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH428139A (en) * | 1965-12-15 | 1967-01-15 | Rueegg Walter | Heating device with fireplace |
DE2943000A1 (en) * | 1979-10-24 | 1981-05-07 | Okal-Werk Niedersachsen Otto Kreibaum Gmbh & Co Kg, 3216 Salzhemmendorf | Dual gas and solid fuel heating boiler - has separate flues for cascade linked combustion chambers of independently optimal sizes |
DE3338126A1 (en) * | 1983-10-20 | 1985-05-02 | Robert Bosch Gmbh, 7000 Stuttgart | Gas-fired heat exchanger, especially for absorption refrigerators |
DE8716241U1 (en) * | 1987-12-09 | 1988-01-28 | Buderus Heiztechnik GmbH, 6330 Wetzlar | Gas boiler |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1026455A1 (en) * | 1999-02-03 | 2000-08-09 | IABER S.p.A. | Basic boiler combustion chamber |
FR2854229A1 (en) * | 2003-04-25 | 2004-10-29 | Realisation Mecaniques Engenee | Heat exchanger for use in gas boiler, has primary and secondary heat exchanger arranged to transverse flow of hot air towards interstice of exchangers, and duct passing another flow of hot air into secondary exchanger |
WO2004097310A1 (en) * | 2003-04-25 | 2004-11-11 | Societe D'etude Et De Realisation Mecaniques Engeneering En Technologies Avancees | Condensation heat exchanger |
US7302916B2 (en) | 2003-04-25 | 2007-12-04 | Rocco Giannoni | Condensation heat exchanger with a gas/air heat collector |
US7617802B2 (en) | 2003-04-25 | 2009-11-17 | Rocco Giannoni | Condensation heat exchanger |
EP2390594A3 (en) * | 2010-05-26 | 2015-08-26 | Gealan Formteile GmbH | Device for heating media |
JP2015155773A (en) * | 2014-02-20 | 2015-08-27 | 株式会社ノーリツ | combustion device |
CN112178939A (en) * | 2019-07-05 | 2021-01-05 | 芜湖美的厨卫电器制造有限公司 | Water heating method and device |
CN112178939B (en) * | 2019-07-05 | 2022-03-01 | 芜湖美的厨卫电器制造有限公司 | Water heating method and device |
Also Published As
Publication number | Publication date |
---|---|
DE69701056D1 (en) | 2000-02-10 |
ES2136495B1 (en) | 2000-07-01 |
EP0806616A3 (en) | 1998-11-18 |
ES2136495A1 (en) | 1999-11-16 |
EP0806616B1 (en) | 2000-01-05 |
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