EP1600708A1 - Method of producing a gas boiler, and gas boiler so produced - Google Patents
Method of producing a gas boiler, and gas boiler so produced Download PDFInfo
- Publication number
- EP1600708A1 EP1600708A1 EP05104398A EP05104398A EP1600708A1 EP 1600708 A1 EP1600708 A1 EP 1600708A1 EP 05104398 A EP05104398 A EP 05104398A EP 05104398 A EP05104398 A EP 05104398A EP 1600708 A1 EP1600708 A1 EP 1600708A1
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- EP
- European Patent Office
- Prior art keywords
- pipe
- length
- axis
- fins
- 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
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000003517 fume Substances 0.000 claims abstract description 29
- 239000007789 gas Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000005520 cutting process Methods 0.000 claims abstract description 3
- 125000006850 spacer group Chemical group 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims 1
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000003754 machining Methods 0.000 claims 1
- 238000009833 condensation Methods 0.000 description 7
- 230000005494 condensation Effects 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000003490 calendering Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 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
- 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
Definitions
- the present invention relates to a method of producing a gas boiler.
- a gas boiler is normally designed to produce hot water for domestic use or for space heating, and comprises a gas burner, and at least one heat exchanger through which the combustion fumes and water flow.
- Some types of gas boilers known as condensation boilers, condense the steam of the combustion fumes by transferring the latent heat of the fumes to the water.
- Condensation boilers are further divided into a first and second type. Gas boilers of the first type are normally equipped with a first exchanger close to the burner; and a second exchanger downstream from the first exchanger along the fume path and designed solely for fume condensation.
- Gas boilers of the second type are equipped with a single heat exchanger which, along a first portion, provides solely for heat exchange, and, along a second portion, in addition to heat exchange, also provides for fume condensation.
- Both exchangers for fume condensation only (first type) and dual-function exchangers (second type) comprise a casing extending along a first axis and through which the fumes are conducted; and a pipe along which water flows, and which is coiled into a succession of turns. The fumes flow over and between the turns to transfer heat to the water flowing along the pipe.
- the coiled pipe has fins extending perpendicularly to the pipe axis.
- exchanger pipes are normally of complex shapes to enhance heat exchange between the water and fumes, and, at the same time, are made of materials of high thermal conductivity.
- the complex shape of the pipes makes it difficult to connect the pipes to the water circuit; so much so that, very often, they are welded directly to the water circuit. Welding, in turn, poses practical problems, such as welding cost, and the fact that the weld region in contact with the fumes and possibly also with fume condensate is highly susceptible to corrosive chemical reactions.
- the present invention also relates to a gas boiler.
- Boiler 1 is a wall-mounted condensation boiler, i.e. of the type in which the steam in the fumes is condensed, and comprises a heat generating and exchange unit 2, in which are fitted a burner 3 and an exchanger 4; an air/gas mixture feed pipe 5; a fume exhaust pipe 6; and a water circulating circuit 7 defined by substantially circular-section pipes.
- Unit 2 is substantially cylindrical, extends along a substantially horizontal axis A1, and comprises a casing 8 through which the fumes flow; a finned pipe 9 along which water flows; and a disk 10 for imposing a given fume flow path inside casing 8.
- Exchanger 4 substantially comprises pipe 9 and casing 8, which also acts as a combustion chamber for burner 3 housed inside casing 8.
- Casing 8 comprises a cylindrical lateral wall 11 of axis A1; a cover 12 connected to lateral wall 11, to pipe 5, and to burner 3; and a cover 13 connected to lateral wall 11 and to exhaust pipe 6. Covers 12 and 13 have respective openings 14 and 15, through which the ends of pipe 9 are inserted for connection to circuit 7.
- Burner 3 extends coaxially with casing 8 and for a given length inside cylindrical lateral wall 11, while pipe 9 forms a coil about an axis A2 substantially coincident with axis A1, and comprises a succession of adjacent turns 16, each located close to lateral wall 11.
- Exchanger 4 also comprises three comb-like spacers 17 (only one shown in Figure 1) for keeping turns 16 a given distance apart and for keeping the whole of coiled pipe 9 at a given distance from lateral wall 11.
- Pipe 9, disk 10, and spacers 17 define inside casing 8 a first central region housing burner 3; a second central region communicating directly with the exhaust pipe; and three lateral regions, each extending between two adjacent spacers 17, turns 16, and lateral wall 11. Combustion of the air-gas mixture takes place in the first central region.
- the combustion fumes are prevented by disk 10 from flowing directly into the second central region, and flow between turns 16, in a direction D1 substantially perpendicular to axis A1, into the three lateral regions, along which they flow in a direction D2 substantially parallel to axis A1. Once inside the lateral regions, the fumes flow between turns 16 in direction D1 into the second central region and then along exhaust pipe 6.
- Pipe 9 which is preferably made of aluminium or aluminium alloy, is formed from an extruded pipe length 18 extending along a straight axis A3, as shown in Figure 2.
- Pipe length 18 is cut to a length L1 from which to form pipe 9, and comprises a wall 19; two fins 20 on one side of pipe length 18; two fins 21 on the opposite side to fins 20; a fin 22 between fins 20; and a fin 23 between fins 21.
- the cross section of pipe length 18 is substantially oval, and has a major axis X and a minor axis Y. Fins 20, 21, 22, 23 are all co-extruded with wall 19, are parallel to axis A3 and major axis X, and are therefore parallel to one another.
- Fins 22 and 23 are coplanar, and lie substantially in the same plane as axis A2 and major axis X. Fins 20 and 21, on the other hand, are located so that each fin 20 is coplanar with an opposite fin 21, and wall 19 of pipe length 18 forms a slight bulge between the coplanar fins 20 and 21.
- the maximum extension of fins 20 and 21, in a direction parallel to major axis X, is roughly equal to a quarter of the length of major axis X.
- pipe length 18 is machined to remove fins 20, 21, 22, 23 from two opposite end portions 18a of pipe length 18, to a given length L2 (only one end portion 18a of pipe length 18 is shown in Figures 2 to 10).
- pipe length 18 is then coiled about an axis A2, so that axis A3 of pipe length 18 is also coiled.
- This operation comprises calendering pipe length 18, while maintaining minor axis Y of the cross section of pipe length 18 substantially parallel to axis A2.
- the relatively small size of fins 20, 21, 22, 23 does not hinder the calendering operation, and is such that no cutting of fins 20, 21, 22, 23 is required.
- end portions 18a are bent square so that two endpieces 18b of end portions 18a are parallel to axis A2.
- each endpiece 18b is worked mechanically to deform it permanently and transform its cross section from substantially oval to circular up to a length L3 smaller than length L2. This is done by placing each endpiece 18b inside a known variable-section die (not shown), and forcing a punch 24 inside endpiece 18b.
- a bevel 25 is worked mechanically on the outer portion of wall 19 and at the opposite ends of pipe length 18 to remove any flaws or surplus material, thus forming pipe 9 from pipe length 18.
- the three spacers 17 are then fitted between fins 21 of adjacent turns 16 and spaced 120 degrees apart to form, with pipe 9, an assembly which is inserted inside cylindrical wall 11 of casing 8.
- axis A2 substantially coincides with axis A1, and turns 16 are maintained a substantially constant distance from wall 11 ( Figure 1).
- Covers 12 and 13 are then fitted onto the opposite ends of cylindrical wall 11, and endpieces 18b of pipe 9 are inserted inside openings 14 and 15.
- the coil of pipe 9 is of constant pitch and radius, so that fins 20 and 21 of each turn 16 face and are parallel to fins 20 and 21 of the adjacent turns 16, as shown in Figure 1. Between adjacent turns 16, a gap is thus formed, which is of constant width at fins 20 and 21, and narrows at the bulge in wall 19.
- the successive gaps form compulsory fume paths, and, because of their shape, produce a venturi effect, which brings about a sharp acceleration in fume flow and increases turbulence to improve heat exchange.
- fins 20 and 21 provide for both increasing the exchange surface of pipe 9 and accelerating fume flow and turbulence.
- number 26 indicates two clamps for securing covers 12 and 13 to cylindrical lateral wall 11.
- Each clamp 26 comprises an automatic fastener 27 (shown open in Figure 12), and has a C-shaped cross section, as shown in Figure 11.
- wall 11 comprises two annular ribs 28 at opposite ends.
- Each cover 12, 13 comprises a portion 29 insertable inside cylindrical lateral wall 11; and an outer portion 30 comprising an annular rib 31, which rests against respective rib 28 to form a seat housing a seal.
- Each two ribs 28 and 31 are held together by one of clamps 26.
- opening 15 (and likewise opening 14) is defined by a sleeve 33, the outer end of which has an internal thread.
- Circuit 7 is connected to unit 2 by means of ring nuts 34, each of which is axially integral with circuit 7, is threaded externally to screw onto sleeve 33, and has a seat 35 housing a seal 36.
- casing 8 communicates externally to exhaust the fumes, to receive gas and air, and to transfer water solely through covers 12 and 13.
- Exchanger 4 as described above may also be used in condensation boilers featuring a main exchanger, and wherein exchanger 4 provides solely for condensing the fumes, and does not act as a combustion chamber, as in the example described.
- Fins 20, 21, 22, 23 provide for increasing both heat exchange and turbulence, and, being parallel to axis A3 of the pipe length, can be extruded easily and, at the same time, can be machined off easily to form fittings.
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- 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)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
Description
- The present invention relates to a method of producing a gas boiler.
- A gas boiler is normally designed to produce hot water for domestic use or for space heating, and comprises a gas burner, and at least one heat exchanger through which the combustion fumes and water flow. Some types of gas boilers, known as condensation boilers, condense the steam of the combustion fumes by transferring the latent heat of the fumes to the water. Condensation boilers are further divided into a first and second type. Gas boilers of the first type are normally equipped with a first exchanger close to the burner; and a second exchanger downstream from the first exchanger along the fume path and designed solely for fume condensation. Gas boilers of the second type are equipped with a single heat exchanger which, along a first portion, provides solely for heat exchange, and, along a second portion, in addition to heat exchange, also provides for fume condensation. Both exchangers for fume condensation only (first type) and dual-function exchangers (second type) comprise a casing extending along a first axis and through which the fumes are conducted; and a pipe along which water flows, and which is coiled into a succession of turns. The fumes flow over and between the turns to transfer heat to the water flowing along the pipe. In some exchangers, the coiled pipe has fins extending perpendicularly to the pipe axis. Though this provides for highly effective heat exchange, producing fins perpendicular to the pipe axis calls for a high-cost production process. In other types of exchangers, the coiled pipe has a depressed flow section, which, though cheaper as a solution, is much less efficient in terms of heat exchange than the finned pipe solution.
- As a result, exchanger pipes are normally of complex shapes to enhance heat exchange between the water and fumes, and, at the same time, are made of materials of high thermal conductivity. The complex shape of the pipes makes it difficult to connect the pipes to the water circuit; so much so that, very often, they are welded directly to the water circuit. Welding, in turn, poses practical problems, such as welding cost, and the fact that the weld region in contact with the fumes and possibly also with fume condensate is highly susceptible to corrosive chemical reactions.
- It is an object of the present invention to provide a method of producing a gas boiler which, on the one hand, is highly efficient in terms of heat exchange, and, on the other, is cheap to produce.
- According to the present invention, there is provided a method of producing a gas boiler, as claimed in Claim 1.
- The present invention also relates to a gas boiler.
- According to the present invention, there is provided a gas boiler as claimed in
Claim 14. - A number of non-limiting embodiments of the present invention will be described by way of example with reference to the accompanying drawings, in which:
- Figure 1 shows a section, with parts removed for clarity, of a gas boiler produced using the method according to the present invention;
- Figures 2 and 3 show views in perspective, with parts removed for clarity, of a length of pipe at two distinct production stages in accordance with the method of the present invention;
- Figures 4, 6 and 8 show front views, with parts removed for clarity, of the length of pipe in Figures 2 and 3 at further production stage;
- Figures 5, 7 and 9 show plan views, with parts removed for clarity, of the pipe length in Figures 4, 6 and 8;
- Figure 10 shows a larger-scale plan view of a further production stage in the method of the present invention;
- Figure 11 shows a smaller-scale, side view, with parts removed for clarity, of the Figure 1 gas boiler;
- Figure 12 shows a larger-scale front view, with parts removed for clarity, of a detail of the Figure 11 boiler;
- Figure 13 shows a larger-scale section of a detail of the Figure 1 gas boiler.
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- Number 1 in Figure 1 indicates as a whole a gas boiler. Boiler 1 is a wall-mounted condensation boiler, i.e. of the type in which the steam in the fumes is condensed, and comprises a heat generating and
exchange unit 2, in which are fitted aburner 3 and anexchanger 4; an air/gasmixture feed pipe 5; afume exhaust pipe 6; and awater circulating circuit 7 defined by substantially circular-section pipes.Unit 2 is substantially cylindrical, extends along a substantially horizontal axis A1, and comprises acasing 8 through which the fumes flow; afinned pipe 9 along which water flows; and adisk 10 for imposing a given fume flow path insidecasing 8.Exchanger 4 substantially comprisespipe 9 andcasing 8, which also acts as a combustion chamber forburner 3 housed insidecasing 8.Casing 8 comprises a cylindricallateral wall 11 of axis A1; a cover 12 connected tolateral wall 11, topipe 5, and toburner 3; and acover 13 connected tolateral wall 11 and toexhaust pipe 6.Covers 12 and 13 haverespective openings pipe 9 are inserted for connection tocircuit 7. -
Burner 3 extends coaxially withcasing 8 and for a given length inside cylindricallateral wall 11, whilepipe 9 forms a coil about an axis A2 substantially coincident with axis A1, and comprises a succession ofadjacent turns 16, each located close tolateral wall 11. -
Exchanger 4 also comprises three comb-like spacers 17 (only one shown in Figure 1) for keeping turns 16 a given distance apart and for keeping the whole of coiledpipe 9 at a given distance fromlateral wall 11.Pipe 9,disk 10, andspacers 17 define inside casing 8 a first centralregion housing burner 3; a second central region communicating directly with the exhaust pipe; and three lateral regions, each extending between twoadjacent spacers 17, turns 16, andlateral wall 11. Combustion of the air-gas mixture takes place in the first central region. The combustion fumes are prevented bydisk 10 from flowing directly into the second central region, and flow betweenturns 16, in a direction D1 substantially perpendicular to axis A1, into the three lateral regions, along which they flow in a direction D2 substantially parallel to axis A1. Once inside the lateral regions, the fumes flow betweenturns 16 in direction D1 into the second central region and then alongexhaust pipe 6. -
Pipe 9, which is preferably made of aluminium or aluminium alloy, is formed from anextruded pipe length 18 extending along a straight axis A3, as shown in Figure 2.Pipe length 18 is cut to a length L1 from which to formpipe 9, and comprises awall 19; two fins 20 on one side ofpipe length 18; two fins 21 on the opposite side tofins 20; afin 22 betweenfins 20; and afin 23 betweenfins 21. The cross section ofpipe length 18 is substantially oval, and has a major axis X and a minor axis Y. Fins 20, 21, 22, 23 are all co-extruded withwall 19, are parallel to axis A3 and major axis X, and are therefore parallel to one another. Fins 22 and 23 are coplanar, and lie substantially in the same plane as axis A2 and major axis X. Fins 20 and 21, on the other hand, are located so that eachfin 20 is coplanar with anopposite fin 21, andwall 19 ofpipe length 18 forms a slight bulge between thecoplanar fins fins - With reference to Figure 3, once extruded with
respective fins pipe length 18 is machined to removefins opposite end portions 18a ofpipe length 18, to a given length L2 (only oneend portion 18a ofpipe length 18 is shown in Figures 2 to 10). - With reference to Figures 4 and 5,
pipe length 18 is then coiled about an axis A2, so that axis A3 ofpipe length 18 is also coiled. This operation, in other words, comprises calenderingpipe length 18, while maintaining minor axis Y of the cross section ofpipe length 18 substantially parallel to axis A2. The relatively small size offins fins - With reference to Figures 6 and 7,
end portions 18a are bent square so that twoendpieces 18b ofend portions 18a are parallel to axis A2. - With reference to Figures 8 and 9, each
endpiece 18b is worked mechanically to deform it permanently and transform its cross section from substantially oval to circular up to a length L3 smaller than length L2. This is done by placing eachendpiece 18b inside a known variable-section die (not shown), and forcing apunch 24 insideendpiece 18b. - With reference to Figure 10, a
bevel 25 is worked mechanically on the outer portion ofwall 19 and at the opposite ends ofpipe length 18 to remove any flaws or surplus material, thus formingpipe 9 frompipe length 18. - The three
spacers 17 are then fitted betweenfins 21 ofadjacent turns 16 and spaced 120 degrees apart to form, withpipe 9, an assembly which is inserted insidecylindrical wall 11 ofcasing 8. By virtue ofspacers 17, axis A2 substantially coincides with axis A1, andturns 16 are maintained a substantially constant distance from wall 11 (Figure 1).Covers 12 and 13 are then fitted onto the opposite ends ofcylindrical wall 11, andendpieces 18b ofpipe 9 are inserted insideopenings - The coil of
pipe 9 is of constant pitch and radius, so thatfins turn 16 face and are parallel tofins adjacent turns 16, as shown in Figure 1. Betweenadjacent turns 16, a gap is thus formed, which is of constant width atfins wall 19. In other words, by virtue ofdisk 10, the successive gaps form compulsory fume paths, and, because of their shape, produce a venturi effect, which brings about a sharp acceleration in fume flow and increases turbulence to improve heat exchange. As such,fins pipe 9 and accelerating fume flow and turbulence. - With reference to Figure 11,
number 26 indicates two clamps for securingcovers 12 and 13 to cylindricallateral wall 11. Eachclamp 26 comprises an automatic fastener 27 (shown open in Figure 12), and has a C-shaped cross section, as shown in Figure 11. With reference to Figure 11,wall 11 comprises two annular ribs 28 at opposite ends. Eachcover 12, 13 comprises a portion 29 insertable inside cylindricallateral wall 11; and anouter portion 30 comprising an annular rib 31, which rests against respective rib 28 to form a seat housing a seal. Each two ribs 28 and 31 are held together by one ofclamps 26. - With reference to Figure 13, opening 15 (and likewise opening 14) is defined by a
sleeve 33, the outer end of which has an internal thread.Circuit 7 is connected tounit 2 by means ofring nuts 34, each of which is axially integral withcircuit 7, is threaded externally to screw ontosleeve 33, and has aseat 35 housing aseal 36. - In other words, casing 8 communicates externally to exhaust the fumes, to receive gas and air, and to transfer water solely through
covers 12 and 13. -
Exchanger 4 as described above may also be used in condensation boilers featuring a main exchanger, and whereinexchanger 4 provides solely for condensing the fumes, and does not act as a combustion chamber, as in the example described. -
Fins
Claims (22)
- A method of producing a gas boiler (1) equipped with a water/fume heat exchanger (4) comprising a casing (8), which extends along a first axis (A1), through which fumes flow, and which is connected to a water circulating circuit (7); and a pipe (9), which is coiled about a second axis (A2), has fins (20, 21, 22, 23), conducts water, and is housed inside said casing (8); the method being characterized by cutting a straight pipe length (18) of a length equal to a first length (L1) to form said pipe (9), said pipe length (18) extending along a third axis (A3) and having said fins (20, 21, 22, 23) along the whole of said first length (L1); and removing said fins (20, 21, 22, 23) from opposite end portions (18a) of said pipe length (18); each end portion (18a) extending to a second length (L2).
- A method as claimed in Claim 1, characterized in that said pipe length (18) is extruded; said fins (20, 21, 22, 23) being co-extruded with said pipe length (18) and parallel to said third axis (A3).
- A method as claimed in Claim 1 or 2,
characterized by machining off said fins (20, 21, 22, 23). - A method as claimed in any one of the foregoing Claims, characterized by coiling said pipe length (18) about said second axis (A2).
- A method as claimed in Claim 4, characterized by bending each end portion (18a) squarely so that an endpiece (18b) of said end portion (18a) is parallel to said second axis (A2).
- A method as claimed in any one of the foregoing Claims, characterized in that said pipe length (18) has a substantially oval cross section; the method comprising deforming each end portion (18a) permanently to impart a circular shape to the cross section at opposite ends and to a third length (L3).
- A method as claimed in Claim 6, characterized by deforming said end portions (18a) by means of a punch (24) forced into said end portions (18a) to said third length (L3).
- A method as claimed in any one of the foregoing Claims, characterized in that said pipe length (18) comprises a wall (19); the method comprising forming an outer bevel (25) on said wall (19) at the ends of the pipe length (18).
- A method as claimed in Claim 8, characterized in that said casing (8) comprises a cylindrical lateral wall (11), a first cover (12), and a second cover (13); the method comprising inserting the coiled pipe (9) inside said cylindrical lateral wall (11), and closing said casing (8) by means of the first and second cover (12, 13).
- A method as claimed in Claim 9, characterized by fixing the first and second cover (12, 13) to said cylindrical lateral wall (11) by means of respective clamps (26).
- A method as claimed in Claim 9 or 10,
characterized in that the first and second cover (12, 13) have respective openings (14, 15); the method comprising inserting said end portions (18a) at least partly inside said openings (14, 15). - A method as claimed in any one of the foregoing Claims, characterized by connecting each of said end portions (18a) to the water circulating circuit (7) by means of a coupling.
- A method as claimed in Claim 1, characterized in that said casing (8) comprises a cylindrical lateral wall (11), and two covers (12, 13) at opposite ends of the cylindrical lateral wall (11); said casing (8) communicating with the outside to exhaust the fumes, to receive gas and air, and to transfer water solely through said covers (12, 13).
- A gas boiler (1) equipped with a water/fume heat exchanger (4) connected to a water circulating circuit (7); the boiler comprising a casing (8), which extends along a first axis (A1) and through which fumes flow; and a pipe (9), which is coiled about a second axis (A2), has fins (20, 21, 22, 23), conducts water, and is housed inside said casing (8); the gas boiler being characterized in that said pipe (9) is formed from a straight pipe length (18) extending along a third axis (A3) and having said fins (20, 21, 22, 23) along the whole of its length equal to a first length (L1); said fins (20, 21, 22, 23) being removed from opposite end portions (18a) of said pipe length (18); and each end portion (18a) extending to a second length (L2).
- A boiler as claimed in Claim 14, characterized in that said pipe length (18) is extruded; said fins (20, 21, 22, 23) being co-extruded with said pipe length (18) and parallel to said third axis (A3).
- A boiler as claimed in Claim 14 or 15,
characterized in that said pipe (9) has a substantially oval cross section, with the exception of two endpieces (18b), along which two respective end parts have a substantially circular cross section. - A boiler as claimed in Claim 16, characterized in that said endpieces (18b) are parallel to said second axis (A2).
- A boiler as claimed in any one of Claims 14 to 17, characterized in that said casing (8) comprises a cylindrical lateral wall (11), and a first and second cover (12, 13) at opposite ends of said cylindrical lateral wall (11); the pipe (9) being housed inside said cylindrical lateral wall (11) and supported by spacers (17) so that the first axis (A1) substantially coincides with the second axis (A2).
- A boiler as claimed in Claims 17 and 18, characterized in that said covers (12, 13) have respective openings (14, 15); said endpieces (18b) being inserted inside said openings (14, 15).
- A boiler as claimed in Claim 19, characterized in that each cover (12; 13) comprises a sleeve (33) defining a respective opening (14, 15); said sleeve (33) having an internal thread cooperating with a ring nut (34) axially integral with the water circulating circuit (7).
- A boiler as claimed in one of Claims 18 to 20, characterized in that said covers (12, 13) are fixed to said cylindrical lateral wall (11) by means of respective clamps (26).
- A boiler as claimed in Claim 21, characterized in that said cylindrical lateral wall (11) comprises two first annular ribs (28) at its opposite ends; and said covers (12, 13) comprise respective second annular ribs (31) secured to the first annular ribs (28) by means of said clamps (26); each clamp (26) having a C-shaped cross section for housing a first and a second annular rib (28, 31).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL05104398T PL1600708T3 (en) | 2004-05-25 | 2005-05-24 | Method of producing a gas boiler, and gas boiler so produced |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI20041044 | 2004-05-25 | ||
IT001044A ITMI20041044A1 (en) | 2004-05-25 | 2004-05-25 | METHOD OF REALIZATION OF A GAS BOILER AND GAS BOILER SO OBTAINED |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1600708A1 true EP1600708A1 (en) | 2005-11-30 |
EP1600708B1 EP1600708B1 (en) | 2011-04-13 |
EP1600708B8 EP1600708B8 (en) | 2011-08-10 |
Family
ID=34939953
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP05104398A Active EP1600708B8 (en) | 2004-05-25 | 2005-05-24 | Method of producing a gas boiler, and gas boiler so produced |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1600708B8 (en) |
CN (1) | CN100458303C (en) |
AT (1) | ATE505692T1 (en) |
DE (1) | DE602005027420D1 (en) |
ES (1) | ES2364557T3 (en) |
IT (1) | ITMI20041044A1 (en) |
PL (1) | PL1600708T3 (en) |
Cited By (16)
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US20080219086A1 (en) * | 2007-03-09 | 2008-09-11 | Peter Mathys | Apparatus for the heat-exchanging and mixing treatment of fluid media |
CN100449220C (en) * | 2007-03-06 | 2009-01-07 | 成都前锋热交换器有限责任公司 | Condensing heat exchanger |
WO2010140174A1 (en) | 2009-06-05 | 2010-12-09 | Riello S.P.A. | Gas boiler, in particular condensation gas boiler for producing hot water |
US8028746B2 (en) | 2007-02-05 | 2011-10-04 | Elbi International S.P.A. | Heat exchanger with finned tube and method of producing the same |
EP2375183A1 (en) | 2010-04-08 | 2011-10-12 | Riello S.p.A. | Heat exchanger for heating at least two fluids and method of producing such a heater |
ITMI20100626A1 (en) * | 2010-04-13 | 2011-10-14 | Riello Spa | HEAT EXCHANGER TO HEAT A LIQUID BY COMBUSTION SMOKES |
WO2011128764A1 (en) | 2010-04-13 | 2011-10-20 | Riello S.P.A. | Method of producing a heat exchanger, and heat exchanger produced using such a method |
DE102011016565A1 (en) | 2010-04-08 | 2011-12-01 | Riello S.P.A. | Heat exchanger i.e. condensation-type heat exchanger, for use in condensing boiler for preparing e.g. domestic hot water, has hollow element comprising supporting structure and coating, which is made of material that contacts with water |
ITMI20101505A1 (en) * | 2010-08-05 | 2012-02-06 | Riello Spa | HEAT EXCHANGER PROVIDED WITH A THERMO-PHOTOVOLTAIC DEVICE |
ITMI20101729A1 (en) * | 2010-09-23 | 2012-03-24 | Riello Spa | CONDENSING HEAT EXCHANGER FOR A GAS BOILER |
CN105650636A (en) * | 2016-02-03 | 2016-06-08 | 浙江广涛卫厨有限公司 | Heat exchanger assembly for burner |
ITUB20153466A1 (en) * | 2015-09-08 | 2017-03-08 | Riello Spa | HEAT EXCHANGER FOR A DOMESTIC BOILER OR A WATER HEATER |
EP3141840A1 (en) | 2015-09-08 | 2017-03-15 | Riello S.p.A. | Heat exchanger for a domestic boiler or a water heater |
EP3141839A1 (en) | 2015-09-08 | 2017-03-15 | Riello S.p.A. | Heat exchanger for heating water in a domestic boiler or a water heater |
IT201800010317A1 (en) * | 2018-11-14 | 2020-05-14 | Condevo S P A | THERMAL EXCHANGE CELL |
EP3770528A3 (en) * | 2016-07-18 | 2021-05-05 | Valmex S.p.A. | Heat exchanger for boiler |
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DE10242643B4 (en) * | 2002-09-13 | 2004-12-02 | Heatec Thermotechnik Gmbh | Water heaters, in particular for heating purposes |
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2004
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- 2005-05-24 DE DE602005027420T patent/DE602005027420D1/en active Active
- 2005-05-24 ES ES05104398T patent/ES2364557T3/en active Active
- 2005-05-24 AT AT05104398T patent/ATE505692T1/en not_active IP Right Cessation
- 2005-05-24 EP EP05104398A patent/EP1600708B8/en active Active
- 2005-05-25 CN CNB2005100738755A patent/CN100458303C/en active Active
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EP1143206A2 (en) * | 2000-04-03 | 2001-10-10 | VTH Verfahrentechnik für Heizung AG | Heat exchanger for boiler or instantaneous heater |
DE20209753U1 (en) * | 2001-06-25 | 2002-10-24 | Vaillant GmbH, 42859 Remscheid | Heater with a combustion chamber |
EP1279903A2 (en) * | 2001-07-26 | 2003-01-29 | Robert Bosch Gmbh | Heat exchanger for a gas heater, esp. for a condensing boiler |
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Cited By (21)
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US8028746B2 (en) | 2007-02-05 | 2011-10-04 | Elbi International S.P.A. | Heat exchanger with finned tube and method of producing the same |
CN100449220C (en) * | 2007-03-06 | 2009-01-07 | 成都前锋热交换器有限责任公司 | Condensing heat exchanger |
US20080219086A1 (en) * | 2007-03-09 | 2008-09-11 | Peter Mathys | Apparatus for the heat-exchanging and mixing treatment of fluid media |
US8794820B2 (en) * | 2007-03-09 | 2014-08-05 | Sulzer Chemtech Ag | Apparatus for the heat-exchanging and mixing treatment of fluid media |
WO2010140174A1 (en) | 2009-06-05 | 2010-12-09 | Riello S.P.A. | Gas boiler, in particular condensation gas boiler for producing hot water |
EP2375183A1 (en) | 2010-04-08 | 2011-10-12 | Riello S.p.A. | Heat exchanger for heating at least two fluids and method of producing such a heater |
DE102011016565A1 (en) | 2010-04-08 | 2011-12-01 | Riello S.P.A. | Heat exchanger i.e. condensation-type heat exchanger, for use in condensing boiler for preparing e.g. domestic hot water, has hollow element comprising supporting structure and coating, which is made of material that contacts with water |
ITMI20100626A1 (en) * | 2010-04-13 | 2011-10-14 | Riello Spa | HEAT EXCHANGER TO HEAT A LIQUID BY COMBUSTION SMOKES |
WO2011128764A1 (en) | 2010-04-13 | 2011-10-20 | Riello S.P.A. | Method of producing a heat exchanger, and heat exchanger produced using such a method |
ITMI20101505A1 (en) * | 2010-08-05 | 2012-02-06 | Riello Spa | HEAT EXCHANGER PROVIDED WITH A THERMO-PHOTOVOLTAIC DEVICE |
EP2434227A2 (en) | 2010-09-23 | 2012-03-28 | Riello S.p.A. | Condensing heat exchanger for a gas boiler |
ITMI20101729A1 (en) * | 2010-09-23 | 2012-03-24 | Riello Spa | CONDENSING HEAT EXCHANGER FOR A GAS BOILER |
EP2434227A3 (en) * | 2010-09-23 | 2014-08-20 | Riello S.p.A. | Condensing heat exchanger for a gas boiler |
ITUB20153466A1 (en) * | 2015-09-08 | 2017-03-08 | Riello Spa | HEAT EXCHANGER FOR A DOMESTIC BOILER OR A WATER HEATER |
EP3141840A1 (en) | 2015-09-08 | 2017-03-15 | Riello S.p.A. | Heat exchanger for a domestic boiler or a water heater |
EP3141839A1 (en) | 2015-09-08 | 2017-03-15 | Riello S.p.A. | Heat exchanger for heating water in a domestic boiler or a water heater |
EP3141841A1 (en) | 2015-09-08 | 2017-03-15 | Riello S.p.A. | Heat exchanger for a domestic boiler or a water heater |
CN105650636A (en) * | 2016-02-03 | 2016-06-08 | 浙江广涛卫厨有限公司 | Heat exchanger assembly for burner |
EP3770528A3 (en) * | 2016-07-18 | 2021-05-05 | Valmex S.p.A. | Heat exchanger for boiler |
CN113375334A (en) * | 2016-07-18 | 2021-09-10 | 瓦勒麦克股份公司 | Heat exchanger for boiler |
IT201800010317A1 (en) * | 2018-11-14 | 2020-05-14 | Condevo S P A | THERMAL EXCHANGE CELL |
Also Published As
Publication number | Publication date |
---|---|
ITMI20041044A1 (en) | 2004-08-25 |
ES2364557T3 (en) | 2011-09-06 |
EP1600708B1 (en) | 2011-04-13 |
CN1702396A (en) | 2005-11-30 |
DE602005027420D1 (en) | 2011-05-26 |
EP1600708B8 (en) | 2011-08-10 |
PL1600708T3 (en) | 2011-10-31 |
ATE505692T1 (en) | 2011-04-15 |
CN100458303C (en) | 2009-02-04 |
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