WO2007093231A1 - Heat exchanger for hot air generator and boiler - Google Patents

Heat exchanger for hot air generator and boiler Download PDF

Info

Publication number
WO2007093231A1
WO2007093231A1 PCT/EP2006/067252 EP2006067252W WO2007093231A1 WO 2007093231 A1 WO2007093231 A1 WO 2007093231A1 EP 2006067252 W EP2006067252 W EP 2006067252W WO 2007093231 A1 WO2007093231 A1 WO 2007093231A1
Authority
WO
WIPO (PCT)
Prior art keywords
exchanger
heat exchanger
exchange fluid
basic elements
combustion chamber
Prior art date
Application number
PCT/EP2006/067252
Other languages
French (fr)
Inventor
Angelo Rigamonti
Original Assignee
Angelo Rigamonti
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=37596327&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2007093231(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Angelo Rigamonti filed Critical Angelo Rigamonti
Priority to AT06807130T priority Critical patent/ATE518107T1/en
Priority to PL06807130T priority patent/PL1989499T3/en
Priority to US12/223,922 priority patent/US8091515B2/en
Priority to CN2006800529269A priority patent/CN101375124B/en
Priority to EA200870255A priority patent/EA012500B1/en
Priority to EP06807130A priority patent/EP1989499B1/en
Publication of WO2007093231A1 publication Critical patent/WO2007093231A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
    • F28D1/0308—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other
    • F28D1/0325—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another
    • F28D1/0333—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another the plates having integrated connecting members
    • 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
    • F24H1/24—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers
    • F24H1/26—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body
    • F24H1/28—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body including one or more furnace or fire tubes
    • 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
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/06—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
    • F24H3/10—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by plates
    • F24H3/105—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by plates using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • F28F3/046—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being linear, e.g. corrugations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49373—Tube joint and tube plate structure

Abstract

There is described a heat exchanger (1) comprised of at least one exchanger module (13), comprising a combustion chamber (10) for the generat ion of an exchange fluid, a slotted wall (11) for the passage of the exchange fluid and an expulsion chamber (12) for the exchange fluid provided with a discharge flue (33). Said exchanger module (13) is formed by a pair of basic elements (14), each of which contributes to form a part of said combustion chamber (10), a part of said slotted wall (11) and a part of said expulsion chamber (12). The basic elements (14) are reciprocally connected in facing position so as to form a single block. The present invention allows to facilitate the assembly operations for a heat exchanger, to obtain modular exchangers and to reduce the structural elements of the exchangers.

Description

"Heat exchanger for hot air generator and boiler"
* * *
DESCRIPTION
The present invention relates to a heat exchanger for hot air generator and boiler.
Heat exchangers are devices that are normally used in industrial or domestic systems to modify the temperature or the state of fluids, e.g. air or water. The principle they are based on is the transmission by conduction of heat through a wall or a membrane, so that two fluids tend to reduce the mutual temperature difference by generating a thermal flow that tends to warm the colder fluid and to cool the warmer fluid. The temperatures obtained at the end of such process vary depending on the physical and chemical characteristics of the fluids (air, water or others) and of the wall or membrane (having high or low thermal conductivity), on the geometry of the membrane surface (a larger slotted wall generally leads to a greater amount of heat exchanged) and on the flow characteristics (forced or natural convection, presence of turbulences).
In this way, the temperature of a fluid ("working fluid") may be modified by forcing the heat exchange with another fluid ("exchange fluid"), a large amount of which is available at a temperature suitable to bring the working fluid to the requested temperature. When the heat exchange is over, the working fluid reaches the requested temperature, whereas the exhausted exchange fluid no longer allows the requested heat exchange and must therefore be expelled. For example, if the working fluid needs to be heated, a heat exchange with fumes obtained by combustion from a burner may be carried out. To put such a process into practice, it is possible to use a heat exchanger comprised of: a combustion chamber to generate high temperature fumes; - a tube bundle for the thermal exchange between the fumes and the working fluid; a collection chamber for the exhausted fumes; connectors between the combustion chamber and the tube bundle and between the latter and the fume collection chamber; - a discharge flue in connection with the fume collection chamber.
More generally, a generic heat exchanger comprises: a combustion chamber; a slotted wall between the exchange fluid and the working fluid; an expulsion chamber for the exhausted exchange fluid; - connector elements between the various components.
Even if the physical principle the heat exchange technique is based on is very simple, there occurs a great difficulty in assembling the exchanger, because the constituent elements and the connector elements are numerous and different; their construction requires the use of a lot of machinery and equipment and of skilled labour.
Moreover, the need to achieve high efficiency in terms of exchanged heat in relation to the size of the heat exchanger leads to force winding paths for the exchange fluid, by inserting devices adapted to obtain a turbulent flow, which further increase the complexity of the heat exchangers. Finally, because of the heat exchanger assembling complexity, it is rather difficult to modify the exchangers once these have already been constructed.
It is the object of the present invention to obtain a heat exchanger allowing to overcome the above-said construction problems. According to the invention such an object is achieved by a heat exchanger comprised of at least one exchanger module comprising a combustion chamber for the generation of an exchange fluid, a slotted wall for the passage of the exchange fluid and an exchange fluid expulsion chamber provided with a discharge flue, characterised in that said exchanger module is formed by a pair of basic elements, each of which contributes to form a part of said combustion chamber, a part of said slotted wall and a part of said expulsion chamber, such basic elements being reciprocally connected in facing position so as to form a single block.
Specifically, said slotted wall provides for winding paths constructed by tilted slots intended to increase the flow vorticity, and therefore the thermal exchange.
A further aid to the formation of turbulences is obtained by conveying the course of the exchange fluid in a descending direction.
Likewise, the exchange fluid is formed in the combustion chamber, it enters the slotted wall and it passes in the expulsion chamber, from which it exits through the discharge flue.
The construction process of an exchanger according to the invention may comprise three processing steps:
- a construction step for said basic elements from sheet elements; - a construction step for said exchanger modules from said basic elements;
- an assembling step for said heat exchanger from said exchanger modules.
Said construction step for said basic elements may comprise the mechanical deformation of sheet elements, through processes such as drawing, and the removal of parts of such a sheet.
Said construction step for said exchanger modules may comprise the connection of basic elements, e.g. obtained by laser welding, and the removal of parts of such basic elements. Said assembling step for an exchanger according to the invention may comprise the connection of several exchanger modules, e.g. obtained by laser welding, so that such exchanger modules are connected in a cascade.
Finally, to said exchanger there must be applied a burner that generates an exchange fluid by burning within the combustion chamber. It may be noted that the construction of an exchanger is particularly simple. Moreover, the addition and the removal of further exchanger modules is facilitated, rendering the modification of size, features and potential of said exchanger easy.
These and other features of the present invention will become more apparent from the following detailed description of an embodiment thereof, which is illustrated by no way of limitation in the accompanying drawings, in which:
Figure 1 shows a perspective view of a heat exchanger according to an embodiment of the present invention; Figure 2 shows a perspective view of an exchanger module constituting the embodiment of Figure 1;
Figure 3 shows a plan view of a basic element of an exchanger module according to the embodiment of Figure 2;
Figure 4 shows a front section along line IV-IV of the basic element of Figure 3;
Figure 5 shows a side section along line V-V of the basic element of Figure 3;
Figure 6 shows a top view of an exchanger module according to the embodiment of Figure 2; Figure 7 shows a side section along line VII-VII of the exchanger module of Figure 6;
Figure 8 shows a front section along line VIII-VIII of the exchanger module of Figure 6;
Figure 9 shows a top view of the exchanger module of Figure 1 ; Figure 10 shows a front section along line X-X of the composite exchanger of Figure 9;
Figure 11 shows a side section along line XI-XI of the exchanger of Figure 9;
Figure 12 shows a plan view of the exchanger of Figure 1 and highlights the connection with a burner; Figure 13 shows a front view of the exchanger of Figure 12 and highlights a sealed housing 50 allowing the heating of a liquid.
With reference to Figure 1, a heat exchanger 1, comprised of three reciprocally connected exchanger modules 13, may be observed, where each module 13 (Figure 2) is subdivided in a combustion chamber 10, a slotted wall 11 and an expulsion chamber 12. Said exchanger module is comprised of two basic elements 14 reciprocally attached in facing position.
One of said basic elements 14, made of stainless steel, is shown in Figures 3-5. There may be recognized: - a surface 20, which contributes to combustion chamber 10 where the exchange fluid is generated, having an aperture 31 which is normally shut; a surface 21, which contributes to form half of the slotted wall 11, having a plurality of slots 25; - a surface 22, which contributes to form said expulsion chamber 12 for the exhausted exchange fluid, having an aperture 32, which is normally shut.
With reference to Figures 6-8, it is possible to observe an exchanger module 13 formed by two basic elements 14. From the comparison of Figure 4 with Figure 8 and the comparison of Figure 7 with Figure 5, it is possible to understand the construction mechanism of said exchanger module 13 from two basic elements 14, which are reciprocally connected by laser welding, and to appreciate the simplicity of the obtainment of the chambers
10 and 12 and slotted walls 11 are obtained from surfaces 20, 22 and 21. It may also be noted that the construction does not need further connector elements between the parts of said exchanger module 13, which is therefore ready for use.
With reference to Figures 9-11, it is possible to observe said heat exchanger 1 formed by three exchanger modules 13. From the comparison of Figure 11 with Figure 7 and the comparison of Figure 8 with Figure 10, it is possible to understand the assembling mechanism of a heat exchanger 1 from exchanger modules 13, which are reciprocally connected by laser welding. Such an assembly provides the opening of communication apertures 31 and 32 in the coupled basic elements 14. With reference to Figures 12-13, it is possible to observe the same heat exchanger 1 formed by three modular elements 13, in which a burner 30 (not shown in Figures 1-11) is highlighted, which is connected to combustion chamber 10 through an aperture 31 that is appropriately opened, and a discharge flue 33 connected to an expulsion chamber 12 at an aperture 32 that is also appropriately opened.
If said heat exchanger is used to heat a liquid, then it may be inserted within an appropriate sealed housing 50 provided with an inlet and an outlet for the liquid.

Claims

1. A heat exchanger (1) comprised of at least one exchanger module (13) comprising a combustion chamber (10) for the generation of an exchange fluid, a slotted wall (11) for the passage of the exchange fluid and an expulsion chamber (12) for the exchange fluid, provided with a discharge flue (33), characterised in that said exchanger module (13) is formed by a pair of basic elements (14), each of which contributes to form a part of said combustion chamber (10), a part of said slotted wall (11) and a part of said expulsion chamber (12), such basic elements (14) being reciprocally connected in facing position so as to form a single block.
2. A heat exchanger according to claim 1, characterised in that said slotted wall (11) provides for winding paths for the exchange fluid, constructed by tilted and crossed slots intended to increase the flow vorticity.
3. A heat exchanger according to claims 1-2, characterised in that the course of the exchange fluid is provided in a descending direction.
4. A heat exchanger according to any of the previous claims, characterised in that it is made of stainless steel.
5. A heat exchanger according to any of the previous claims, characterised in that the combustion chamber (10) is connected to a burner
(30).
6. A heat exchanger according to any of the previous claims, characterised in that it is inserted within a sealed housing (50), in order to allow the heating of a liquid contained in said sealed housing.
7. A construction process for an exchanger according to any of the previous claims, characterised in that it comprises a construction step for said basic elements (14) from sheet elements, a construction step for said exchanger modules (13) from said basic elements (14), and an assembling step for said heat exchanger (1) from said exchanger modules (13).
8. A process according to claim 7, characterised in that said construction step for said basic elements (14) comprises the mechanical deformation of stainless steel sheet elements.
9. A process according to any of claims 7-8, characterised in that said construction step for said exchanger modules (13) provides for the laser welding of said basic elements (14).
10. A process according to any of claims 7-9, characterised in that said assembling step for said exchanger (1) provides for the laser welding of said exchanger modules (13).
11. A process according to any of claims 7-10, characterised in that said construction steps provide for the opening of an aperture (31) for the application of a burner (30) and of a further aperture (32) for the application of a discharge flue (33).
PCT/EP2006/067252 2006-02-15 2006-10-11 Heat exchanger for hot air generator and boiler WO2007093231A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AT06807130T ATE518107T1 (en) 2006-02-15 2006-10-11 HEAT EXCHANGER FOR HOT AIR GENERATOR AND BOILER
PL06807130T PL1989499T3 (en) 2006-02-15 2006-10-11 Heat exchanger for hot air generator and boiler
US12/223,922 US8091515B2 (en) 2006-02-15 2006-10-11 Heat exchanger for hot air generator and boiler
CN2006800529269A CN101375124B (en) 2006-02-15 2006-10-11 Heat exchanger for hot air generator and boiler
EA200870255A EA012500B1 (en) 2006-02-15 2006-10-11 Heat exchanger for hot air generator and boiler
EP06807130A EP1989499B1 (en) 2006-02-15 2006-10-11 Heat exchanger for hot air generator and boiler

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000274A ITMI20060274A1 (en) 2006-02-15 2006-02-15 HEAT EXCHANGER FOR HOT AIR GENERATOR AND BOILER
ITMI2006A000274 2006-02-15

Publications (1)

Publication Number Publication Date
WO2007093231A1 true WO2007093231A1 (en) 2007-08-23

Family

ID=37596327

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/067252 WO2007093231A1 (en) 2006-02-15 2006-10-11 Heat exchanger for hot air generator and boiler

Country Status (8)

Country Link
US (1) US8091515B2 (en)
EP (1) EP1989499B1 (en)
CN (1) CN101375124B (en)
AT (1) ATE518107T1 (en)
EA (1) EA012500B1 (en)
IT (1) ITMI20060274A1 (en)
PL (1) PL1989499T3 (en)
WO (1) WO2007093231A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008138803A2 (en) * 2007-05-11 2008-11-20 Angelo Rigamonti Boiler with variously-shaped heat exchange elements.
EP2116791A2 (en) 2008-05-09 2009-11-11 Angelo Rigamonti A high water content boiler with an improved heat exchange.
EP2354702A1 (en) 2010-01-21 2011-08-10 Angelo Rigamonti Modular thermic assembly with modulating burners for condensation boiler.
EP2735812A3 (en) * 2012-11-26 2016-09-07 Vaillant GmbH Boiler

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DE102008037762A1 (en) * 2008-08-14 2010-02-18 Robert Bosch Gmbh Cast iron or aluminum sectional boilers
KR101576667B1 (en) * 2014-03-17 2015-12-11 주식회사 경동나비엔 Heat exchanger of condensing gas boiler
DE202015008982U1 (en) 2015-01-26 2016-05-23 Viessmann Werke Gmbh & Co Kg boiler
DE102015101048B3 (en) 2015-01-26 2016-06-09 Viessmann Werke Gmbh & Co Kg boiler
JP1653096S (en) * 2018-11-26 2020-02-17
JP1653095S (en) * 2018-11-26 2020-02-17
JP1653094S (en) * 2018-11-26 2020-02-17

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US4470455A (en) * 1978-06-19 1984-09-11 General Motors Corporation Plate type heat exchanger tube pass
JPH0674678A (en) * 1992-08-24 1994-03-18 Nippondenso Co Ltd Lamination type heat exchanger and manufacture thereof
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Cited By (6)

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Publication number Priority date Publication date Assignee Title
WO2008138803A2 (en) * 2007-05-11 2008-11-20 Angelo Rigamonti Boiler with variously-shaped heat exchange elements.
WO2008138803A3 (en) * 2007-05-11 2009-03-12 Angelo Rigamonti Boiler with variously-shaped heat exchange elements.
EA015650B1 (en) * 2007-05-11 2011-10-31 Анджело Ригамонти Boiler with variously-shaped heat exchange elements
EP2116791A2 (en) 2008-05-09 2009-11-11 Angelo Rigamonti A high water content boiler with an improved heat exchange.
EP2354702A1 (en) 2010-01-21 2011-08-10 Angelo Rigamonti Modular thermic assembly with modulating burners for condensation boiler.
EP2735812A3 (en) * 2012-11-26 2016-09-07 Vaillant GmbH Boiler

Also Published As

Publication number Publication date
EP1989499A1 (en) 2008-11-12
ITMI20060274A1 (en) 2007-08-16
US8091515B2 (en) 2012-01-10
EP1989499B1 (en) 2011-07-27
ATE518107T1 (en) 2011-08-15
EA200870255A1 (en) 2009-02-27
US20090044931A1 (en) 2009-02-19
PL1989499T3 (en) 2011-12-30
CN101375124A (en) 2009-02-25
EA012500B1 (en) 2009-10-30
CN101375124B (en) 2012-02-01

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