EP2995880B1 - Improved boiler heat exchanger - Google Patents

Improved boiler heat exchanger Download PDF

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Publication number
EP2995880B1
EP2995880B1 EP14184726.9A EP14184726A EP2995880B1 EP 2995880 B1 EP2995880 B1 EP 2995880B1 EP 14184726 A EP14184726 A EP 14184726A EP 2995880 B1 EP2995880 B1 EP 2995880B1
Authority
EP
European Patent Office
Prior art keywords
exchanger
heat exchanger
portions
exchanger according
heat
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
EP14184726.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2995880A1 (en
Inventor
Valentino Battistello
Stefano Guderzo
Antonio Sandro
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.)
Baxi SpA
Original Assignee
Baxi 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
Priority to SI201430571T priority Critical patent/SI2995880T1/en
Priority to RS20171234A priority patent/RS56643B1/sr
Priority to LTEP14184726.9T priority patent/LT2995880T/lt
Priority to PT141847269T priority patent/PT2995880T/pt
Application filed by Baxi SpA filed Critical Baxi SpA
Priority to HUE14184726A priority patent/HUE036237T2/hu
Priority to ES14184726.9T priority patent/ES2656112T3/es
Priority to PL14184726T priority patent/PL2995880T3/pl
Priority to EP14184726.9A priority patent/EP2995880B1/en
Priority to DK14184726.9T priority patent/DK2995880T3/en
Publication of EP2995880A1 publication Critical patent/EP2995880A1/en
Application granted granted Critical
Publication of EP2995880B1 publication Critical patent/EP2995880B1/en
Priority to HRP20180108TT priority patent/HRP20180108T1/hr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
    • F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
    • F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel

Definitions

  • This invention relates to a heat exchanger for a boiler according to the pre-characterising portion of the main claim.
  • Document WO2010140174 discloses the preamble of claim 1.
  • a conventional heat exchanger for a boiler of the type operating on gaseous or liquid fuel is designed to exchange heat between the combustion products, generated by a conventional burner of the boiler, and a heat transfer fluid (usually water) contained in the exchanger.
  • the latter generally comprises a casing or cylindrical body, having end portions that enclose a cylindrical lateral surface.
  • a tube device for example in coil form, in which the heat transfer fluid circulates, said tube unit opening in an inlet and an outlet on the cylindrical body.
  • the coil can be single or concentric.
  • the fluid circulating therein is water from the heating circuit
  • domestic water circulates in the tube inside the coil and water from the heating circuit runs in the gap between the two tubes.
  • combustion products gas or fumes capable of transferring their heat to the above-mentioned fluid before leaving said body are also present (produced from a burner inside the casing, for example).
  • the cylindrical body or casing is composed of three or more components that are difficult to separate in order to gain access to the coil (and any other components) inside the above-mentioned casing or body; in other solutions, the latter is a single-piece or multi-piece structure and cannot be dismantled, which completely prevents any access to its internal components (coil, temperature-control devices, if any, insulation elements or other parts).
  • DE 20 2011 001615 describes a heat exchanger comprising a cylindrical body of the type composed of several portions connected together and closed at both of its opposing ends.
  • a coil tube device having inlet and outlet openings, in which a fluid, typically water, circulates.
  • the various portions of the body are connected together on planes orthogonal to the longitudinal axis of each portion (coinciding with the longitudinal axis of the cylindrical body) and have no hydraulic manifolds or connections to connect to pipes for the inlet or outlet of water from the exchanger nor an exhaust opening for the fumes.
  • connection elements or manifolds are added to the cylindrical body later.
  • the tube device is not easy to fit between the above-mentioned portions due to their perfectly cylindrical conformation, which requires the tube device to be fitted into them by inserting it perfectly coaxially to the longitudinal axis of each portion.
  • the aim of the present invention is to offer a heat exchanger that is improved in comparison to those known.
  • the aim of the present invention is to offer an exchanger of the type mentioned that is easier to fit than known exchangers and allows its simple removal if an intervention is required on the coil or other components inside its casing.
  • Another aim is to offer an exchanger of the type mentioned that ensures an optimum heat exchange between the heat transfer fluid and the combustion products circulating therein, as well as its safe use even in a closed environment.
  • a further aim is to offer a heat exchanger of the above-mentioned type that is low cost.
  • Yet another aim is to offer a heat exchanger comprising a reduced number of parts whose assembly involves the use of just one sealing element between said parts, which ensures an optimum seal against the combustion products present therein.
  • a further aim is to offer a heat exchanger of the type that is already prepared for connection with an exhaust pipe for the fumes capable of conveying them away from the exchanger (towards a point in which the fumes are released into the environment outside the place, for example an apartment, where the heat exchanger is used); in addition, another aim is to offer such an exchanger that is already prepared for connection to pipes in which the heat transfer fluid, entering and exiting the tube device or coil, circulates.
  • an exchanger is indicated generally by 1 and has a body or casing 2 containing a heat exchanging coil or tube device 3 (generally in any form, not necessarily a coil) in which can flow a heat transfer fluid capable of receiving heat from the exhaust products of combustion generated by a burner and operating on gaseous or liquid fuel (not shown) appropriately connected to the exchanger 1.
  • a heat transfer fluid capable of receiving heat from the exhaust products of combustion generated by a burner and operating on gaseous or liquid fuel (not shown) appropriately connected to the exchanger 1.
  • These exhaust products (or fumes) exit the body 2 through an exhaust opening or hole 5 with which the body 2 is already provided forming one piece with it. This facilitates the connection of the exchanger to at least one conventional pipe to exhaust the fumes outside the environment where the exchanger is located, reduces the time required to fit it in said environment and also reduces the costs of this operation.
  • the coil may be single or concentric.
  • the fluid circulating therein is water from the heating circuit
  • domestic water circulates in the tube inside the coil and water from the heating circuit runs in the gap between the two tubes.
  • the casing or body 2 has a cylindrical lateral surface 8 and end parts 9 and 10 that enclose, with said surface 8, an inner compartment 12 of the exchanger. Inside the latter is the tube device 3 connected at its free ends (only one of which, indicated by 13, is visible in Figure 1 ) to inlet 15 and outlet 16 openings or manifolds of the heat transfer fluid, provided in the body 2. These openings or manifolds are already prepared for simplified connection to pipes, external to the exchanger 1, in which circulates the heat transfer fluid entering and exiting respectively the tube device or coil 3.
  • the casing 2 comprises two portions or covers 20 and 21 each defining at least part of the lateral surface 8, said portions having corresponding free ends 20A and 21A connected together along an oblique plane P in relation to a longitudinal axis W of the body or casing 2.
  • an annular sealing element 23 At these ends 20A and 21A is located an annular sealing element 23. The latter is preferably and advantageously the only sealing element present between portions 20 and 21.
  • the portions or covers 20 and 21 are connected together by means of screws 25.
  • these portions 20 and 21 can be connected together by snap fitting or tierods or other removable mechanical securing means.
  • the first portion or cover 20, having the fume outlet or exhaust hole 5 forming one piece therewith, comprises an irregular cylindrical part 26, with the open end 20A lying in the above-mentioned oblique plane P.
  • This portion 20 is closed at one of its ends by a substantially flat cover 27 (forming one piece with the remaining part of portion 20), defining the end part 9 of the exchanger, with stiffening ribs 28 and having an external plate 29 near the hole 5, of a known type (for example, as described in Patent Application MI2005U000456 in the name of the present Applicant) to collect condensate or rainwater from the conventional combustion air intake pipe connected to the boiler (not shown).
  • a known type for example, as described in Patent Application MI2005U000456 in the name of the present Applicant
  • the fume exhaust pipe (not shown).
  • This plate 29 also forms one piece with the portion 20.
  • the condensate or rainwater collected in the external plate 29 can be conveyed directly, through the exchanger, to a drain for the condensate of the exchanger 60 (also forming one piece with the body or casing 2) or, as in the case of the above-mentioned prior patent filed by the applicant, can be evacuated by means of an external tube connected to a siphon of the boiler.
  • the second portion or cover 21 comprises a cylindrical part capable of connecting with the irregular cylindrical part 26 of the first portion or cover 20 and having its free end 21A located on the above-mentioned plane P.
  • This second cover 21 has a partially enclosed end 32 having a through-hole 33 capable of enabling the introduction into the exchanger (and in particular into the tube device 3) of the burner (not shown).
  • a separator plate 35 is screwed, to which is fixed an insulating plate 37 and which partialises the intermediate compartment 12 of the exchanger 1.
  • the position of the plate is determined on the basis of the exchanger efficiency tests.
  • the plate has two teeth (not shown) that enable it to be screwed onto the threads of the coil while at the same time guaranteeing the seal between the plate and the coil.
  • the coil 3 is centred on the first and in the second covers 20, 21 by means of corresponding bushes 39, each of which also serves to contain a sealing ring 40 or another similar gasket. These bushes are located at the openings or manifolds 15 and 16. Furthermore, the covers 20 and 21 are shaped so that, on inserting the two ends of the coil into the above-mentioned openings or manifolds 15 and 16, these covers can house the coil in a simple and precise way.
  • the conformation of the above-mentioned ends 20A and 21A allows an operator easy access into a first cover, for example cover 20, in order to position a first end of the coil or device 3 correctly into the opening 15.
  • the conformation of the end 20A of this cover 20 therefore "guides" its connection with the end 21A of the other cover 21 (connection is obligated precisely because of the oblique conformation of the above-mentioned ends), which also leads to a correct connection of the second end 13 of the coil with the opening 16.
  • the fact that the covers 20 and 21 have one oblique free end facilitates the fitting both of the device 3 into the exchanger and the fitting of the body or casing 2 thereof.
  • the openings or manifolds 15 and 16 also comprise connection elements 41 cooperating with the corresponding bush 39.
  • the longitudinal dimension of the exchanger 1 along the axis W can be extended by inserting between the two covers 20 and 21 an element or extension (not shown in the drawing).
  • a metal protection element 50 is provided between the coil 3 and the cover 20, which is preferably made from composite material. The element 50 serves to protect the cover 20 from high temperatures.
  • the cover 21 is preferably made from aluminium and does not require this protection.
  • This element or extension of an annular or partially annular shape, has opposing edges complementary to the ends 20A, 21A of the portions 20 and 21 (that is, they are also oblique to facilitate the fitting of the coil or device 3 into the body 2 and the final assembly thereof).
  • the exchanger thus obtained has an ease of assembly and disassembly that cannot be obtained with known exchangers and allows a simple adaptation to the required potentials of use and also simplifies the methods of intervention on the coil (or other heat exchange device) and on the components inside the exchanger, should this be necessary during the use thereof.

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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)
EP14184726.9A 2014-09-15 2014-09-15 Improved boiler heat exchanger Active EP2995880B1 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
LTEP14184726.9T LT2995880T (lt) 2014-09-15 2014-09-15 Patobulintas boilerio šilumokaitis
PT141847269T PT2995880T (pt) 2014-09-15 2014-09-15 Permutador de calor de caldeira melhorado
EP14184726.9A EP2995880B1 (en) 2014-09-15 2014-09-15 Improved boiler heat exchanger
HUE14184726A HUE036237T2 (hu) 2014-09-15 2014-09-15 Továbbfejlesztett kazán-hõcserélõ
RS20171234A RS56643B1 (sr) 2014-09-15 2014-09-15 Unapređeni razmenjivač toplote kotla
PL14184726T PL2995880T3 (pl) 2014-09-15 2014-09-15 Ulepszony wymiennik ciepła kotła
SI201430571T SI2995880T1 (en) 2014-09-15 2014-09-15 Improved heat exchanger for boiler
DK14184726.9T DK2995880T3 (en) 2014-09-15 2014-09-15 Improved boiler heat exchanger
ES14184726.9T ES2656112T3 (es) 2014-09-15 2014-09-15 Intercambiador de calor de caldera mejorada
HRP20180108TT HRP20180108T1 (hr) 2014-09-15 2018-01-22 Poboljšani izmjenjivač topline za parni kotao

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14184726.9A EP2995880B1 (en) 2014-09-15 2014-09-15 Improved boiler heat exchanger

Publications (2)

Publication Number Publication Date
EP2995880A1 EP2995880A1 (en) 2016-03-16
EP2995880B1 true EP2995880B1 (en) 2017-11-01

Family

ID=51627942

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14184726.9A Active EP2995880B1 (en) 2014-09-15 2014-09-15 Improved boiler heat exchanger

Country Status (10)

Country Link
EP (1) EP2995880B1 (hr)
DK (1) DK2995880T3 (hr)
ES (1) ES2656112T3 (hr)
HR (1) HRP20180108T1 (hr)
HU (1) HUE036237T2 (hr)
LT (1) LT2995880T (hr)
PL (1) PL2995880T3 (hr)
PT (1) PT2995880T (hr)
RS (1) RS56643B1 (hr)
SI (1) SI2995880T1 (hr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2016755B1 (nl) * 2016-05-10 2017-11-16 Remeha B V Warmtewisselaar.
IT201600074665A1 (it) * 2016-07-18 2018-01-18 Ariston Thermo Spa Scambiatore di calore per caldaia o simili
IT201800009186A1 (it) * 2018-10-05 2020-04-05 Valmex Spa Scambiatore di calore per caldaie a gas perfezionato
EP3877705B1 (en) * 2020-01-29 2021-12-22 Emas Makina Sanayi Anonim Sirketi Heat exchanger with gas discharge system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010140174A1 (en) * 2009-06-05 2010-12-09 Riello S.P.A. Gas boiler, in particular condensation gas boiler for producing hot water
DE202011001615U1 (de) 2010-01-21 2011-03-31 Viessmann Werke Gmbh & Co Kg Heizkessel

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
RS56643B1 (sr) 2018-03-30
PL2995880T3 (pl) 2018-04-30
HUE036237T2 (hu) 2018-06-28
LT2995880T (lt) 2018-01-10
ES2656112T3 (es) 2018-02-23
HRP20180108T1 (hr) 2018-02-23
SI2995880T1 (en) 2018-04-30
EP2995880A1 (en) 2016-03-16
DK2995880T3 (en) 2018-01-22
PT2995880T (pt) 2018-02-02

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