EP2438362A1 - Chaudiere a gaz, notamment chaudiere a gaz a condensation pour la production d'eau chaude - Google Patents

Chaudiere a gaz, notamment chaudiere a gaz a condensation pour la production d'eau chaude

Info

Publication number
EP2438362A1
EP2438362A1 EP09787746A EP09787746A EP2438362A1 EP 2438362 A1 EP2438362 A1 EP 2438362A1 EP 09787746 A EP09787746 A EP 09787746A EP 09787746 A EP09787746 A EP 09787746A EP 2438362 A1 EP2438362 A1 EP 2438362A1
Authority
EP
European Patent Office
Prior art keywords
gas boiler
assembly
casing
boiler according
helix
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
Application number
EP09787746A
Other languages
German (de)
English (en)
Other versions
EP2438362B1 (fr
Inventor
Stefano Casiraghi
Christian Cannas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Elbi International SpA
Original Assignee
Elbi International SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Elbi International SpA filed Critical Elbi International SpA
Priority to PL09787746T priority Critical patent/PL2438362T3/pl
Publication of EP2438362A1 publication Critical patent/EP2438362A1/fr
Application granted granted Critical
Publication of EP2438362B1 publication Critical patent/EP2438362B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • F24H1/43—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes helically or spirally coiled
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F24H9/00—Details
    • F24H9/06—Arrangement of mountings or supports
    • 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
    • F24H9/14—Arrangements for connecting different sections, e.g. in water heaters 
    • 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
    • F24H9/14—Arrangements for connecting different sections, e.g. in water heaters 
    • F24H9/142—Connecting hydraulic components
    • F24H9/144—Valve seats, piping and heat exchanger connections integrated into a one-piece hydraulic unit
    • 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
    • F24H9/14—Arrangements for connecting different sections, e.g. in water heaters 
    • F24H9/146—Connecting elements of a heat exchanger

Definitions

  • the present invention relates to a gas boiler.
  • the present invention relates to a condensation gas boiler for producing hot water for warming purposes or hot sanitary water.
  • One of the objects of the present invention consists in making a gas boiler that is relatively easy to be assembled.
  • Another object of the present invention consists in making a gas boiler with relatively few parts to be assembled. Still another object of the present invention consists in making a gas boiler that can be easily dismantled for maintenance purposes .
  • a further object of the present invention consists in making a gas boiler of relatively small size.
  • a gas boiler in particular a condensation gas boiler for producing hot water along a water circuit; the gas boiler comprising: a gas combustion and premixing assembly for producing thermal energy and combustion fumes; a heat exchanging assembly including a casing having an open end, and an elongated hollow member wound, at least in part, in a helix and defining a portion of said water circuit in said casing; a fume evacuation assembly for evacuating the combustion fumes from the heat exchanging assembly; and a hydraulic assembly for controlling the water flow in said water circuit; said casing being clamped at said open end by the fume evacuation assembly and the hydraulic assembly, which are so shaped so as to close the open end of the casing.
  • the fume evacuation assembly and the hydraulic assembly co-operate to close the casing of the heat exchanging assembly instead of using a dedicated cover for the casing and a number of conduit connections that would be required when using a separate cover.
  • the reduction of the number of parts of the gas boiler makes easier and faster the assembling and dismantling of the gas boiler. Furthermore, the reduction of parts makes possible to design gas boilers of smaller size.
  • said helix is clamped by the fume evacuation assembly and the hydraulic assembly so as to keep the helix and the casing mutually aligned about an axis and form an annular gap between the helix and the casing. As a consequence spacing members are not required to keep the helix spaced apart from casing for forming the annular gap.
  • the fume evacuation assembly comprises a first cover portion and a manifold portion integrally made so as to form a single piece preferably of polymeric moulded material.
  • the hydraulic assembly comprises a second cover portion and circuit portion of said water circuit; wherein the second cover portion and the circuit portion are integrally made so as to form a single piece preferably of moulded polymeric material .
  • FIG. 1 shows a front side perspective view, with parts removed for clarity and parts exploded, of a gas boiler in accordance with the present invention
  • FIG. 2 shows a back side perspective view, with parts removed for clarity and parts exploded, of the gas boiler of figure 1.
  • reference numeral 1 indicates as a whole a wall-mounted condensation gas boiler for producing hot water along a water circuit Cl, which, in turn, exchanges thermal energy with the sanitary water conveyed along a sanitary water circuit C2.
  • the gas boiler 1 comprises a frame F to be hanged to a wall, not shown.
  • a frame F to be hanged to a wall, not shown.
  • Figure 1 it is shown a part of the back side of frame F, which, in use, is mounted parallel to the wall.
  • the gas boiler 1 comprises a gas combustion and premixing assembly 2 for producing thermal energy and combustion fumes; a heat exchanging assembly 3 including a casing 4 and an elongated hollow member 5 defining a portion of the water circuit Cl; a fume evacuation assembly 6 for evacuating the combustion fumes from the heat exchanging assembly 3; and a hydraulic assembly 7 for controlling the flow of the water along the water circuit Cl.
  • the premixing and combustion assembly 2 comprises a fan 8; a cylindrical burner 9; a conduit 10 connecting the fan 8 to the cylindrical burner 9; and an annular cover 11 extending about the burner 9.
  • the parts of the premixing and combustion assembly 2 are pre-assembled together so as to form a unitary assembly that includes also ignition devices and probes, not shown in the enclosed Figures and supported by the annular wall 11.
  • the heat exchanging assembly 3 comprises the casing 4 with an open end, namely a back open end, and the elongated hollow member 5.
  • the casing 4 comprises a cylindrical wall 12; and a front annular wall 13, which is joined to the cylindrical wall 12, and includes an axial sleeve 14 for supporting the elongated hollow member 5, and holes 15 for connecting the premixing and combustion assembly 2 to the heat exchanging assembly 3 by means of screws, not shown.
  • the elongated hollow member 5 is wound, at least in part, in a cylindrical helix 16 about an axis Al perpendicular to the back side of the frame F and to the wall, not shown.
  • the helix 16 has a constant pitch and a constant radius, and includes a number of spaced apart turns.
  • the elongated hollow member 5 comprises a front straight end 17 parallel to axis Al, and a back straight end 18 extending tangentially with respect to helix 16.
  • the front straight end 17 is housed into the axial sleeve 14 of the front annular wall 13, whereas the back straight end 18 is directly coupled to the hydraulic assembly 7.
  • the elongated hollow element 5 comprises a tube 19 having an oval cross-section and a number of fins, not shown, parallel to the tube 19, and co-extruded with tube 19.
  • the tube 19 has a circular cross-section and is deprived from fins as disclosed in the European patent application EP 1,600,708 Al.
  • the mutually spaced apart turns of helix 16 defines a helical gap between them, an annular gap with the cylindrical wall 12 to be travelled by the combustion fume and a cylindrical space to house the burner 9 and the combustion fumes.
  • the heat exchanging assembly 3 further comprises a disc, which is not shown in the enclosed Figures, and is screwed into the helix 16 as disclosed in the European patent application EP 1,600,708 Al.
  • the fume evacuation assembly 6 and the hydraulic assembly 7 are clamped onto the casing 4 at said open end in order to close the open end.
  • the fume evacuation assembly 6 comprises a cover portion 20 for coupling to the casing 4, and a manifold portion 21 having an, upper opening for attachment to an evacuation conduit not shown in the enclosed Figures.
  • the cover portion 20 and the manifold portion 21 are integrally- made in a single piece of moulded polymeric material.
  • manifold portion 21 is provided with a back opening shown in phantom, which is an alternative to the upper opening.
  • the hydraulic assembly 7 comprises a cover portion 22 to be coupled to the casing 4 and to cover portion 20, and a circuit portion 23, which are integrally made in a single piece of moulded polymeric material.
  • the cover portions 20 and 22 are suitable to be joined one another by means of flanges 24 and screws, not shown in the enclosed Figures.
  • the fume evacuation assembly 6 and the hydraulic assembly 7 are assembled by means of flanges 24 and screws (not shown) .
  • the cover portions 20 and 22 once assembled form a cup shaped body, which is suitable to house an edge portion of casing 4 and a portion of helix 16, which protrudes from the edge portion of casing 4.
  • the cover portions 20 and 22 act as a spacing member for keeping the helix 16 and the casing 4 in a mutual, concentric position about axis Al.
  • cover portions 20 and 22 comprise respective clamps 25A and 25B of cylindrical shape so as to match with the external face of cylindrical wall 12, and clamps 26A and 26B of cylindrical shape, which are sized so as to match with the outer profile of the helix 16, are concentric with clamps 25A and 25B and have a smaller inner diameter than clamps 25A and 25B. Furthermore, the cover portions 20 and 22 comprise respective rest wall sections 27A, and 27B arranged transversally to axis Al and inclined with respect to axis Al of an angle corresponding to the inclination of the helix 16.
  • Rest wall sections 27A and 27B have the function of abutting against the last turn at the back side of the helix 16 to prevent the direct passage of the combustion fumes from the annular gap to the manifold portion 21.
  • the helix 16 is suspended to the annular front wall 13 by means of the front straight end 17 inserted in the axial sleeve 14 of the annular front wall 13, whereas is clamped between the two cover portions 20 and 22 in order to form the annular gap without the need of additional spacing members .
  • the hydraulic assembly 7 further comprises a pump 28 for controlling the flow of water along the water circuit Cl; a three-way valve 29 for selectively directing the water along a first branch (warming branch) of water circuit Cl or a second branch (re-circulation circuit) of water circuit Cl; and a plate heat-exchanger 30 for exchanging the thermal energy between the water flowing in the water circuit Cl, and the sanitary water flowing in the sanitary water circuit C2.
  • the pump 28 comprises a pump body 31, an impeller 32, and an actuator 33.
  • the pump body 31 is integrally made with the circuit portion 23 so as to form a single piece of moulded polymeric material, whereas the impeller 32 and the actuator 33 are assembled together to form a unit to be coupled to the circuit portion 31.
  • the three-way valve 29 comprises a valve body 34, a shutter 35 movable inside the valve body 34, and an actuator 36 to drive the shutter 35.
  • the valve body 34 is integrally made with the circuit portion 23 so as to form a single piece of moulded polymeric material, whereas the shutter 35 and the actuator 36 are assembled to form a unit to be coupled to the circuit portion 23.
  • the plate heat exchanger 30 as shown in Figure 2 has two pipe connections 37 and 38 for the sanitary water circuit C2 , and as shown in Figure 1 two pipe connections 39 and 40 to be connected to circuit portion 23.
  • the circuit portion 23 comprises two pipe connections 41 and 42, which are suitable to be connected respectively to pipe connections 39 and 40, and are integrally made with the circuit portion
  • the circuit portion 23 includes a portion of water circuit Cl extending through it, and is directly coupled to the elongated hollow member 5 by means of a pipe connector 43, which is integrally made with the circuit portion 23 so as to form a single piece of moulded polymeric material, and protrudes inside the cover portion 22.
  • the number of parts of a heat exchanger may be reduced in a considerable extent.
  • the reduction of parts has a positive effect in the reduction of the number of operations required for assembling and dismantling the gas boiler, and the allow designing gas boiler of smaller size.

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)
  • Incineration Of Waste (AREA)
  • Details Of Fluid Heaters (AREA)

Abstract

La présente invention concerne une chaudière à gaz, notamment chaudière à gaz à condensation pour la production d'eau chaude dans un circuit d'eau (C11) comportant un ensemble de pré-mélange et de combustion de gaz (2) pour produire de l'énergie thermique et des vapeurs de combustion ; un ensemble d'échange thermique (3) comprenant un boîtier (4) présentant une extrémité ouverte, et un organe creux de forme allongée (5) enroulé, au moins en partie, en une spirale (16) et définissant une partie du circuit d'eau (C1) dans ledit boîtier ; un ensemble d'évacuation de vapeurs (6) pour évacuer les vapeurs de combustion depuis l'ensemble d'échangeur thermique (3) ; et un ensemble hydraulique (7) pour la circulation de l'eau dans le circuit d'eau (C1). Le boîtier (4) est serré contre l'extrémité ouverte par l'ensemble d'évacuation de vapeurs (6) et l'ensemble hydraulique (7), qui sont conformés de manière à fermer l'extrémité ouverte du boîtier (4).
EP09787746.8A 2009-06-05 2009-06-05 Chaudiere a gaz, en particulier chaudiere a gaz a condensation pour la production d'eau chaude Active EP2438362B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09787746T PL2438362T3 (pl) 2009-06-05 2009-06-05 Kocioł gazowy, w szczególności kondensacyjny kocioł gazowy do produkcji gorącej wody

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2009/000244 WO2010140174A1 (fr) 2009-06-05 2009-06-05 Chaudiere a gaz, notamment chaudiere a gaz a condensation pour la production d'eau chaude

Publications (2)

Publication Number Publication Date
EP2438362A1 true EP2438362A1 (fr) 2012-04-11
EP2438362B1 EP2438362B1 (fr) 2015-08-19

Family

ID=41606690

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09787746.8A Active EP2438362B1 (fr) 2009-06-05 2009-06-05 Chaudiere a gaz, en particulier chaudiere a gaz a condensation pour la production d'eau chaude

Country Status (4)

Country Link
EP (1) EP2438362B1 (fr)
ES (1) ES2553758T3 (fr)
PL (1) PL2438362T3 (fr)
WO (1) WO2010140174A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL2966353T3 (pl) * 2014-07-10 2019-07-31 Riello S.P.A. Sposób modyfikacji kotła na paliwo gazowe
DK2995880T3 (en) * 2014-09-15 2018-01-22 Baxi Spa Improved boiler heat exchanger
IT201600074665A1 (it) * 2016-07-18 2018-01-18 Ariston Thermo Spa Scambiatore di calore per caldaia o simili

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3336910A (en) 1966-06-16 1967-08-22 William H Taylor Water heater and heat exchanger
ITMI20041044A1 (it) 2004-05-25 2004-08-25 Riello Spa Metodo di realizzazione di una caldaia a gas e caldaia a gas cosi'ottenuta
GB0525157D0 (en) * 2005-12-09 2006-01-18 Ec Power As Fluid distributor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010140174A1 *

Also Published As

Publication number Publication date
EP2438362B1 (fr) 2015-08-19
WO2010140174A1 (fr) 2010-12-09
ES2553758T3 (es) 2015-12-11
PL2438362T3 (pl) 2016-03-31

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