EP3141839B1 - Wärmetauscher zum erwärmen von wasser in einem haushaltskessel oder wassererhitzer - Google Patents

Wärmetauscher zum erwärmen von wasser in einem haushaltskessel oder wassererhitzer Download PDF

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Publication number
EP3141839B1
EP3141839B1 EP16187766.7A EP16187766A EP3141839B1 EP 3141839 B1 EP3141839 B1 EP 3141839B1 EP 16187766 A EP16187766 A EP 16187766A EP 3141839 B1 EP3141839 B1 EP 3141839B1
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EP
European Patent Office
Prior art keywords
heat exchanger
end wall
tubular member
thermally insulating
water
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.)
Active
Application number
EP16187766.7A
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English (en)
French (fr)
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EP3141839A1 (de
Inventor
Stefano Casiraghi
Noè Ciofolo
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.)
Riello SpA
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Riello SpA
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Priority to PL16187766T priority Critical patent/PL3141839T3/pl
Publication of EP3141839A1 publication Critical patent/EP3141839A1/de
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Publication of EP3141839B1 publication Critical patent/EP3141839B1/de
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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
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
    • F28D7/024—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of only one medium being helically coiled tubes, the coils having a cylindrical configuration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2270/00—Thermal insulation; Thermal decoupling

Definitions

  • the invention relates to a heat exchanger for heating water in a domestic boiler or a water heater.
  • the invention relates to a heat exchanger comprising a casing; and a tubular member, which is wound, in a spiral shape, about a given axis, so as to form a plurality of adjacent loops, which are housed inside the casing.
  • the tubular member, wound in a helix shape is flown through by water, while combustion fumes or, more generically, hot gases containing water vapour flow in the casing.
  • the loops are spaced apart from one another so as to form an empty space where the combustion fumes can flow.
  • the heat exchanger described above is configured for defining a path for the hot gases extending between the adjacent loops, so as to optimize the heat exchange between the hot gases and the water flowing in the tubular member.
  • the dimensions of the tubular member, the shape of the cross section of the tubular member and the dimensions of the empty space between the adjacent coils are very relevant parameters in order to optimize the heat exchange.
  • EP 1,627,190 B1 EP 1,600,708 A1 ; EP 1,750,070 A1 ; EP 1,750,069 A1 ; EP 1,752,718 A1 show some significant examples of heat exchangers for domestic boilers.
  • Document EP 1,627,190 B1 discloses how to produce a heat exchanger by means of a method comprising the steps of producing a straight tubular member, made of aluminium, by means of an extrusion process; winding the tubular member in a helix shape about a given axis so as for form a plurality of adjacent coils; arranging spacers between the adjacent coils; and closing the tubular member, wound in a helix shape, in a casing.
  • the casing of the heat exchanger has a lateral wall, generally having a substantially cylindrical shape; and two end walls.
  • One of the two end walls has a substantially annular shape and is configured for housing a burner, while the other end wall has a substantially disc-like shape and is generally subjected to a strong heating. Therefore, there is the problem of limiting the transmission of heat to the outside through this end wall.
  • EP1562006 and WO2012156954 disclose heat exchangers comprising an end wall configured for supporting a thermally insulating device.
  • WO2005080900 discloses a heat exchanger comprising an end wall configured for supporting an auxiliary heat exchanger.
  • the object of the invention is to provide a heat exchanger configured for limiting heat losses to the outside.
  • a heat exchanger for producing hot water, the heat exchanger comprising a casing; and a tubular member, which is configured for being flown through water to be heated, and is wound in a helix about a given axis for forming a plurality of adjacent coils housed in the casing, wherein the casing comprises an end wall, which has a inner face and an outer face; and is configured for supporting a thermally insulating device along the inner face, and for defining an auxiliary heat exchanger along the outer face.
  • the end wall is designed for being equipped with a thermally insulating device or with an auxiliary heat exchanger.
  • the choice between the thermally insulating device and the heat exchanger is made based on the layout, the dimensions of the heat exchanger, and the desired degree of efficiency of the heat exchange. Therefore, the invention allows you to produce a heat exchanger that is highly versatile and capable of equipping domestic boilers of different ranges.
  • the end wall comprises mounting members for mounting the thermally insulating device, said mounting member being arranged along the inner face.
  • the end wall has an inner face configured for mounting and housing the thermally insulating device.
  • the end wall has a central seat along the inner face for housing the thermally insulating device and a further seat along the inner face for housing an end coil, in particular the further seat extends about the central seat, has an annular shape, and is divided from the central seat by an annular partition.
  • the thermally insulating device is a panel of insulting material, which preferably has the shape of a disc having a through hole for fixing it to the end wall.
  • the end wall has a looped rib, which defines a space along the outer face, the rib is configured for being joined to a flange so that the space can convey water.
  • the heat exchanger besides limiting heat losses towards the outside, can be configured for increasing thermal efficiency.
  • the auxiliary heat exchanger is hydraulically connectable to an end section of the tubular member.
  • water flows from the space to the tubular member after having received heat through the end wall.
  • the end wall comprises a tubular body, which is in communication with the space and is configured for housing an end section of the tubular member and a first hydraulic fitting for hydraulically connecting the tubular member with a conduit of a hydraulic circuit or a second hydraulic fitting for hydraulically connecting the tubular member to the auxiliary heat exchanger.
  • the water path is pre-selected based on the presence of the auxiliary heat exchanger in the end wall, simply using the first or the second hydraulic fitting.
  • the flange has an opening configured for hydraulically connecting the auxiliary heat exchanger to a conduit of a hydraulic circuit.
  • the flange comprises a partition configured to define a given path for the water to be heated in said space; in particular, the partition is spiral-shaped for defining a spiral-shaped path.
  • the spiral-shaped path optimizes the heat exchange between the water to be heated and the end wall.
  • number 1 indicates, as a whole, a heat exchanger, which, in this specific case, is a condensing heat exchanger for heating water in a domestic boiler or in a water heater.
  • the heat exchanger 1 comprises a casing 2 with a cylindrical shape; and a tubular member 3, which is partly wound, in a helix shape, about an axis A so as to form coils 4 and two straight end sections 5 and 6 and is housed in the casing 2.
  • the casing 2 comprises a lateral wall 7, which has a substantially cylindrical shape and is preferably made of a metal material, such as for example aluminium, or of a plastic material; an end wall 8 substantially shaped like a disc; and an end wall 9 with a substantially annular shape.
  • the end walls 8 and 9 are coupled to the lateral wall 7 so as to form the casing 2, which delimits a combustion fumes circulation chamber.
  • the end wall 9 has a central opening 10 for housing a burner with a cylindrical shape, not shown in the accompanying Figures, which is partly arranged inside the combustion fumes circulation chamber.
  • the hot fumes are conveyed through the central opening 19 by means of channels that are not shown in the accompanying Figures.
  • the lateral wall 7 comprises an opening 11 for the extraction of the combustion fumes and an opening 12 for the extraction of the condensate ( Figure 2 ).
  • the end sections 5 and 6 are partly housed inside tubular bodies 13 and 14, which are an integral part of the casing, are respectively obtained in the end wall 8 and in the end wall 9, and are configured for being coupled to respective hydraulic fittings 15 and 16 so as to adjust and hydraulically connect the tubular member 3 to conduits of the hydraulic circuit, which is not shown in the accompanying Figures.
  • the end wall 8 has an inner face 17 and an outer face 18, and is configured for supporting a thermally insulating device 19 along the inner face 17 and for defining an auxiliary heat exchanger 20 along the outer face 18.
  • the end wall 8 comprises mounting elements for fixing the thermally insulating device 19 to the end wall 8.
  • the mounting elements comprise a pin 21, which is integral to the end wall 8 and is arranged centrally relative to the end wall 8 along the inner face 17; a screw 22, which can be coupled to the pin 21; and a washer 23.
  • the thermally insulating device 19 is a panel of thermally insulating material, which has a central hole 24 designed to house the pin 21.
  • the panel of thermally insulating material has a circular shape and has a diameter that is slightly smaller than the inner diameter of the coils 4.
  • the end wall 8 has a central seat 25 along the inner face 17 for housing the thermally insulating device 19 and radial ribs 26 for avoiding an extended contact between the thermally insulating device 19 and the end wall 8.
  • the end wall 8 has a seat 27 along the inner face 17 for housing, at least partly, an end coil.
  • the seat 27 has an annular shape, extends about the central seat 25, and is divided from the central seat 25 by an annular partition 28.
  • the seat 27 leads into the tubular body 13, which forms one single piece together with the end wall 8.
  • the auxiliary heat exchanger 20 transfers, to the water flowing into the heat exchanger 1, heat that would otherwise be released to the outside of the heat exchanger 1.
  • the end wall 8 has a space 30 along the outer face 18, which is configured for being enclosed by a flange 31 and for being flown through by water.
  • the space 30 is laterally delimited by a looped rib 32, which is integral to the end wall 8, projects parallel to the axis A, and has seats for fixing elements 33, which are configured for mounting the flange 31 on the rib 32.
  • the space 30 leads into the tubular body 13.
  • the hydraulic connection between the space 30 and the tubular member 3 is made possible by the hydraulic fitting 29, which has a blind flange 34 mounted on the tubular body 13 and a conveying portion 35 integral to the blind flange 34 and having a lateral opening 36 facing the space 30.
  • the flange 31 comprises an opening 37 configured for hydraulically connecting the space 30 to a conduit of the hydraulic circuit, not shown herein and on the outside of the heat exchanger 1.
  • the flange 31 comprises a partition 38, which is configured to define a given path for the water in said space 30.
  • the partition 38 is spiral-shaped for defining a spiral-shaped path between the tubular body 13 and the opening 37.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)

Claims (10)

  1. Ein Wärmetauscher zum Erwärmen von Wasser in einem Haushaltskessel oder einem Wassererhitzer, wobei der Wärmetauscher (1) aufweist: ein Gehäuse (2); und ein rohrförmiges Teil (3), das zum Leiten von Wasser ausgebildet ist und in einer Helix um eine vorgegebene Achse (A) gewunden ist, um eine Mehrzahl von nebeneinander liegenden Windungen (4) zu bilden, die in dem Gehäuse (2) angeordnet sind; wobei das Gehäuse (2) eine Stirnwand (8), die eine Innenseite (17) und eine Außenseite hat, aufweist, dadurch gekennzeichnet, dass die Innenseite (17) zur Halterung einer thermischen Isolationsvorrichtung (19) ausgebildet ist, und die Außenseite (18) zur Bildung eines Hilfswärmetauschers (20) ausgebildet ist, so dass die Stirnwand (8) zur wahlweisen Halterung der thermischen Isolationsvorrichtung (19) oder des Hilfswärmetauschers (20) geeignet ist.
  2. Der Wärmetauscher nach Anspruch 1, wobei die Stirnwand Halteteile (21, 22, 23) zur Halterung der thermischen Isolationsvorrichtung (19) aufweist, wobei dieses Halteteil entlang der Innenseite (17) angeordnet ist.
  3. Der Wärmetauscher nach Anspruch 1 oder 2, wobei die Stirnwand (8) einen zentralen Sitz (25) entlang der Innenseite (17) zur Aufnahme der thermischen Isolationsvorrichtung (19) hat.
  4. Der Wärmetauscher nach einem der vorhergehenden Ansprüche, wobei die Stirnwand (8) einen weiteren Sitz (27) entlang der Innenseite (17) zur Aufnahme einer Endwindung (4) hat, wobei sich der weitere Sitz (27) insbesondere über den zentralen Sitz (25) erstreckt, eine ringförmige Form hat, und von dem zentralen Sitz (25) durch eine ringförmige Trennwand (28) abgetrennt ist.
  5. Der Wärmetauscher nach einem der vorhergehenden Ansprüche, wobei die thermische Isolationsvorrichtung (19) ein Panel aus Isolationsmaterial ist:
  6. Der Wärmetauscher nach einem der vorhergehenden Ansprüche, wobei die Stirnwand (8) eine gewundene Sicke (32) hat, welche einen Raum entlang der Außenseite (18) bildet, wobei die Sicke (32) zur Verbindung mit einem Flansch (31) ausgebildet ist, so dass der Raum (30) Wasser leiten kann.
  7. Der Wärmetauscher nach einem der vorhergehenden Ansprüche, wobei der Hilfswärmetauscher (20) hydraulisch mit einem Endabschnitt (5) des rohrförmigen Teils (3) verbindbar ist.
  8. Der Wärmetauscher nach einem der vorhergehenden Ansprüche, wobei die Stirnwand (8) einen rohrförmigen Körper (13) aufweist, der zur Aufnahme des Endabschnitts (5) des rohrförmigen Teils (3) und eines ersten hydraulischen Anschlussstücks (15) zur hydraulischen Verbindung des rohrförmigen Teils (3) mit einem Kanal eines Hydraulikkreislaufs oder eines zweiten hydraulischen Anschlussstücks (29) zur hydraulischen Verbindung des rohrförmigen Teils (3) mit dem Hilfswärmetauscher (20), ausgebildet ist.
  9. Der Wärmetauscher nach einem der Ansprüche 6 bis 8, wobei der Flansch (30) eine Öffnung (37) hat, die zur hydraulischen Verbindung des Hilfswärmetauschers (20) mit einem Kanal eines Hydraulikreislaufs ausgebildet ist.
  10. Der Wärmetauscher nach einem der Ansprüche 6 bis 9, wobei der Flansch (31) eine Trennwand (38) aufweist, die zur Bildung eines vorgegebenen Pfades für Wasser in diesem Raum (30) ausgebildet ist; wobei die Trennwand (38) insbesondere zur Bildung eines spiralförmigen Pfades spiralförmig ist.
EP16187766.7A 2015-09-08 2016-09-08 Wärmetauscher zum erwärmen von wasser in einem haushaltskessel oder wassererhitzer Active EP3141839B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL16187766T PL3141839T3 (pl) 2015-09-08 2016-09-08 Wymiennik ciepła do podgrzewania wody w kotle domowej instalacji grzewczej lub podgrzewaczu wody

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITUB2015A003465A ITUB20153465A1 (it) 2015-09-08 2015-09-08 Scambiatore di calore per riscaldare acqua in una caldaia domestica o in uno scaldabagno

Publications (2)

Publication Number Publication Date
EP3141839A1 EP3141839A1 (de) 2017-03-15
EP3141839B1 true EP3141839B1 (de) 2020-01-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP16187766.7A Active EP3141839B1 (de) 2015-09-08 2016-09-08 Wärmetauscher zum erwärmen von wasser in einem haushaltskessel oder wassererhitzer

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EP (1) EP3141839B1 (de)
ES (1) ES2777541T3 (de)
IT (1) ITUB20153465A1 (de)
PL (1) PL3141839T3 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202100032207A1 (it) * 2021-12-22 2023-06-22 Valmex S P A Scambiatore di calore con fascio tubiero comprendente almeno due sezioni

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1375306A (fr) * 1963-09-23 1964-10-16 Ross Gmbh Vorm Joseph Meys & C Chaudière perfectionnée pour caloporteurs de chaleur à point d'ébullition élevé
ITMI20030769A1 (it) 2003-04-11 2004-10-12 Riello Spa Scambiatore di calore, metodo di realizzazione di tale scambiatore e caldaia comprendente tale scambiatore.
ITTO20040022A1 (it) * 2004-01-22 2004-04-22 Cosmogas Srl Scambiatore di calore, in particolare del tipo a condensazione
DE102004005048A1 (de) * 2004-01-30 2005-09-01 Viessmann Werke Gmbh & Co Kg Heizgerät
ITMI20041044A1 (it) 2004-05-25 2004-08-25 Riello Spa Metodo di realizzazione di una caldaia a gas e caldaia a gas cosi'ottenuta
ES2348581T3 (es) 2005-08-05 2010-12-09 Riello S.P.A. Método de fabricación de un intercambiador de calor.
PL1750070T3 (pl) 2005-08-05 2012-10-31 Elbi Int Spa Kocioł gazowy wyposażony w wymiennik ciepła z użebrowaną rurą i sposób jego wytwarzania
PL1750069T3 (pl) 2005-08-05 2013-07-31 Elbi Int Spa Wymiennik ciepła i sposób jego wytwarzania
ITTO20110446A1 (it) * 2011-05-19 2012-11-20 Cosmogas Srl Scambiatore di calore e procedimento di realizzazione

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
ES2777541T3 (es) 2020-08-05
EP3141839A1 (de) 2017-03-15
PL3141839T3 (pl) 2020-06-29
ITUB20153465A1 (it) 2017-03-08

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