EP2776774B1 - Élément de radiateur de chauffage composé d'aluminium moulé sous pression - Google Patents

Élément de radiateur de chauffage composé d'aluminium moulé sous pression Download PDF

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Publication number
EP2776774B1
EP2776774B1 EP12806676.8A EP12806676A EP2776774B1 EP 2776774 B1 EP2776774 B1 EP 2776774B1 EP 12806676 A EP12806676 A EP 12806676A EP 2776774 B1 EP2776774 B1 EP 2776774B1
Authority
EP
European Patent Office
Prior art keywords
connection
aluminium
heat exchange
die
lateral
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.)
Not-in-force
Application number
EP12806676.8A
Other languages
German (de)
English (en)
Other versions
EP2776774A1 (fr
Inventor
Orlando NIBOLI
Maurizio BOLOGNA
Fabio Sassi
Francesco Franzoni
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.)
Fondital SpA
Original Assignee
Fondital SpA
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Publication date
Application filed by Fondital SpA filed Critical Fondital SpA
Priority to PL12806676T priority Critical patent/PL2776774T3/pl
Publication of EP2776774A1 publication Critical patent/EP2776774A1/fr
Application granted granted Critical
Publication of EP2776774B1 publication Critical patent/EP2776774B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/14—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally
    • F28F1/16—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means being integral with the element, e.g. formed by extrusion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/088—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal for domestic or space-heating systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
    • F28F9/262—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators

Definitions

  • the present invention concerns a heating radiator element made of die-cast aluminium.
  • a radiator for heating buildings consists of a battery of radiator elements positioned side by side, normally (although not necessarily) produced separately and then assembled to form a radiator of appropriate dimensions.
  • each radiator element has a main body which is essentially tubular and provided with an inner chamber in which a hot fluid circulates (commonly, water).
  • radiator element Some main types of radiator element are particularly widespread, which are characterised essentially by the component material and by some structural features due to the production technology. In fact, the manufacturing technologies and materials directly affect the structure of the radiator elements and their heat exchange mechanisms.
  • Radiators made of die-cast aluminium are characterised with respect to other types, for example aluminium radiators produced by extrusion (consisting of an extruded central body to which two end headers are subsequently fixed) or radiators made of cast iron or other metallic materials, not only by the production technologies but also by some structural characteristics, which are due to the materials used and the production techniques.
  • the general configuration of the single radiator element is substantially consolidated and consists essentially of a tubular body provided with inner water chamber and hydraulic connections arranged at the opposite ends of the element; from the water chamber, along a centreline plane of the element, two opposite aluminium partitions branch off, supporting a front plate and a rear plate respectively; a plurality of heat exchange fins protrude from the tubular body.
  • CH544920A discloses a radiator element according to the preamble of claim 1.
  • One of the reference parameters commonly used to characterise a radiator element is the specific power per unit of weight, i.e. the ratio between the thermal power emitted by the radiator element and transferred to the environment (measured according to specific standards, for example EN 442) and the weight of the element (which is the fundamental parameter directly affecting production costs).
  • One object of the present invention is to provide a die-cast aluminium heating radiator element which has a high thermal performance, superior to that of a traditional radiator element of comparable dimensions and weight, and complying with the market dimensional standards.
  • the present invention therefore relates to a die-cast aluminium heating radiator element as essentially defined in the attached claim 1 and, in its preferred embodiments, in the dependent claims.
  • the radiator element of the invention has decidedly superior performance, with the same footprint and dimensions, and specifically a superior specific power.
  • the improvement in performance is obtained by a particular shape of the area of the hydraulic connections of the element, shaped so as to favour heat exchange between the aluminium and the air with respect to the heat exchange between the water (circulating inside the radiator element) and the aluminium, as in the known art which considers the water/aluminium exchange the critical aspect to be improved in order to increase the performance of the radiator element.
  • the heat is transferred to the environment to be heated in three successive stages: first, the heat is transferred by the water that circulates inside the radiator element (namely in the water chamber) to the walls of the water chamber by forced convection; the heat is then transferred by conduction to the inside of the aluminium structure of the radiator element, passing from the walls of the water chamber to the other parts of the element (fins, partitions, plates); lastly, the heat is transferred from the aluminium to the air of the environment in which the radiator element is installed essentially by natural convection (in addition to radiation but to a significantly lesser and substantially negligible extent).
  • the radiator element therefore includes a water circuit, defined by the water chamber and by the hydraulic connections that connect the element to adjacent elements and/or to an external hydraulic system, and an air circuit, defined by the volumes available for passage of the air around the aluminium structure of the element.
  • the most effective heat exchange part is considered the high temperature part between the water and the aluminium.
  • the known art consequently prescribes an increase in the temperature and the dimensions of the water/aluminium exchange surfaces.
  • the technicians of the Applicant have realised that the critical aspect for increasing the efficiency of the radiator element (its specific power) is the heat exchange between the aluminium and the air, and not the heat exchange between the water and the aluminium.
  • the transmission of heat is increased between the aluminium of the radiator element and the air that laps its surfaces, specifically in the critical area around the hydraulic connections, in particular those at the upper end of the element.
  • the invention derives from the adoption of a new approach to the problem of increasing the specific power of a radiator element made of die-cast aluminium.
  • a traditional radiator element has critical areas in which the speed of the air that laps the surfaces of the element is relatively low, and in these areas the heat exchange can be improved.
  • a critical area for the aluminium/air heat exchange is the area surrounding the hydraulic connections, especially those arranged at the upper end of the element.
  • the traditional radiator elements have metal exchange elements which extend from the outer lateral surface of the connections and connect it in particular to an upper fin which also (and mainly) has aesthetic functions.
  • the radiator element according to the invention allows a more uniform and complete utilisation of the available exchange surfaces, improved utilisation also of the aesthetic fin normally positioned at the top of the element and improved utilisation of the lateral surface of the connection, in addition to the area of the partition above the connection.
  • a heating radiator element 1 made of die-cast aluminium comprises a substantially tubular monolithic body 2 made of aluminium (said term also comprising aluminium alloys) by means of a die-casting process.
  • the element 1 and the body 2 extend substantially along a longitudinal axis A (in use, substantially vertical) between two axially opposed ends 3, 4; the body 2 is provided with a main inner water chamber 5 for passage of the water, radially delimited by a lateral wall 6 arranged around the axis A and closed axially at respective opposite longitudinal ends; advantageously, but not necessarily, the body 2 has a cross section (perpendicular to the axis A) substantially oval, elliptic or in any case elongated along an axis, and the lateral wall 6 of the body 2 which delimits the chamber 5 is tapered towards one of the ends 3, 4.
  • connections 7 which protrude from opposite sides of the body 2 along respective central axes X parallel to each other and substantially perpendicular to the axis A to connect the element 1 to other similar elements and/or to an external hydraulic system;
  • the connections 7 are shaped for example (but not necessarily) like cylindrical sleeves with circular section and are internally provided with transverse through ducts 8, communicating with the chamber 5.
  • the element 1 comprises a system 10 of heat exchange fins.
  • the system 10 comprises: a pair of partitions 11 which protrude diametrically opposite from the lateral wall 6 along a longitudinal centreline plane of the element 1; a front plate 12 and a rear plate 13, arranged at respective ends of the partitions 11 and substantially perpendicular to the partitions 11 and parallel to the axis A, optionally formed of several sectors or portions of plate separated by slits and/or apertures; a plurality of lateral fins 14 which protrude from the body 2, namely from the lateral wall 6 and/or from the partitions 11.
  • the element 1 has a width L (maximum width of the element 1, given by the distance between the opposite free ends of each pair of connections 7 aligned along an axis X), a depth P (distance between the plates 12, 13) and a centre distance I (distance between the central axes X of the connections 7).
  • the body 2, including the connections 7, and the system 10 define as a whole an aluminium structure 15 of the element 1.
  • the entire structure 15 constitutes a monolithic piece produced by die-casting.
  • the element 1 includes a water circuit 16, defined by the main chamber 5 delimited by the wall 6 and by the ducts 8 of the connections 7; and an air circuit 17, defined by the volumes available for passage of the air around the structure 15.
  • each of the connections 7 arranged at the upper end 3 of the element 1 has a continuous annular lateral surface 21 closed in a ring, which extends from the side 20 and is without interruptions and/or radial projections protruding from it and defines an annular channel 22 which completely surrounds the connection 7 and is delimited at the rear by the side 20 of the element.
  • connection 7 is attached to the respective side 20 by means of a root edge 23 and the side 20 extends all around the root edge 23; the channel 22 therefore has an end wall 24 defined by the portion of the side 20 which surrounds the root edge 23.
  • connection 7 has central symmetry with respect to the central axis X and has a lateral wall of uniform thickness around the central axis X.
  • At least one deflecting element 25 faces a portion of the lateral surface 21 of the connection 7 and is radially spaced from the lateral surface 21 to define a portion of the channel 22.
  • the deflecting element 25 includes an upper heat exchange fin 26, arranged above the connection 7 and radially spaced from it to define an upper portion of the channel 22 around the connection 7; the fin 26 extends from the side 20 and is not connected to the lateral surface 21 of the connection 7.
  • the deflecting element 25 includes one or more lateral heat exchange fins 27, arranged on one or respective sides of the connection 7 to define respective portions of the channel 22 around the connection 7; the lateral fins 27 extend from the side 20 of the element 1 and are not connected to the lateral surface 21 of the connection 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Resistance Heating (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Claims (4)

  1. Elément de radiateur de chauffage (1) réalisé à partir d'un aluminium moulé sous pression, s'étendant le long d'un axe longitudinal (A) et ayant une structure monolithique (15) réalisée en aluminium par moulage sous pression, comprenant un corps tubulaire (2) prévu avec une chambre à eau interne principale (5) pour le passage de l'eau, radialement délimitée par une paroi latérale (6) agencée autour de l'axe (A) ; des raccordements (7) qui s'étendent à partir des côtés latéraux opposés (20) du corps (2) le long des axes centraux (X) respectifs pour raccorder l'élément (1) à d'autres éléments similaires et/ou à un système hydraulique externe ; et un système (10) d'ailettes d'échange thermique, qui comprend une paire de séparations (11) qui font saillie de manière diamétralement opposée de la paroi latérale (6) le long d'un plan central longitudinal de l'élément (1), une plaque avant (12) et une plaque arrière (13) agencées au niveau des extrémités respectives des séparations (11) et sensiblement perpendiculaires aux séparations (11) et parallèles à l'axe (A), et une pluralité d'ailettes latérales (14) qui font saillie du corps (2) ; au moins un raccordement (7) agencé au niveau d'une extrémité supérieure (3) de l'élément (1) ayant une surface latérale annulaire continue (21), sans saillies radiales et définissant un canal annulaire (22) qui entoure complètement le raccordement (7) et est délimité à l'arrière par le côté (20) de l'élément (1) ; l'élément (1) étant caractérisé en ce qu'au moins un élément de déviation (25) fait face à une partie de la surface latérale (21) du raccordement (7) et est espacé radialement de ladite surface latérale (21) pour définir une partie du canal (22) ; l'élément de déviation (25) comprenant une ailette d'échange thermique supérieure (26) agencée au-dessus du raccordement (7) et radialement espacée de ce dernier pour définir une partie supérieure du canal (22) autour du raccordement (7) ; ladite ailette d'échange thermique supérieure (26) s'étendant à partir du côté (20) de l'élément (1) et n'étant pas raccordée à la surface latérale (21) du raccordement (7).
  2. Elément selon la revendication 1, dans lequel le raccordement (7) est raccordé au côté (20) au moyen d'un bord de base (23) et le côté (20) de l'élément (1) s'étend tout autour dudit bord de base (23).
  3. Elément selon l'une des revendications précédentes, dans lequel le raccordement (7) a une symétrie centrale par rapport à l'axe central (X).
  4. Elément selon l'une des revendications précédentes, dans lequel le raccordement (7) a une paroi latérale ayant une épaisseur uniforme autour de l'axe central (X).
EP12806676.8A 2011-11-09 2012-11-09 Élément de radiateur de chauffage composé d'aluminium moulé sous pression Not-in-force EP2776774B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12806676T PL2776774T3 (pl) 2011-11-09 2012-11-09 Element grzejnika wykonany z ciśnieniowego odlewu aluminiowego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT002028A ITMI20112028A1 (it) 2011-11-09 2011-11-09 Elemento di radiatore da riscaldamento in alluminio pressofuso
PCT/IB2012/056310 WO2013068991A1 (fr) 2011-11-09 2012-11-09 Élément de radiateur de chauffage composé d'aluminium moulé sous pression

Publications (2)

Publication Number Publication Date
EP2776774A1 EP2776774A1 (fr) 2014-09-17
EP2776774B1 true EP2776774B1 (fr) 2015-11-04

Family

ID=45034073

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12806676.8A Not-in-force EP2776774B1 (fr) 2011-11-09 2012-11-09 Élément de radiateur de chauffage composé d'aluminium moulé sous pression

Country Status (8)

Country Link
EP (1) EP2776774B1 (fr)
CN (1) CN104053964B (fr)
EA (1) EA025798B1 (fr)
ES (1) ES2557191T3 (fr)
IT (1) ITMI20112028A1 (fr)
PL (1) PL2776774T3 (fr)
PT (1) PT2776774E (fr)
WO (1) WO2013068991A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2016820B1 (en) 2016-05-24 2017-12-04 Van Holsteijn & Kemna Special Products B V Low temperature radiator.
ITUA20164166A1 (it) * 2016-06-07 2017-12-07 Fondital Spa Dispositivo di riscaldamento e sistema modulare di riscaldamento con possibilita' di allestimento modulare in fase di installazione
ITUA20164170A1 (it) * 2016-06-07 2017-12-07 Fondital Spa Dispositivo di riscaldamento ad alta efficienza
IT201800005477A1 (it) * 2018-05-17 2019-11-17 Elemento di radiatore da riscaldamento

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1679386A1 (de) * 1967-10-05 1970-09-10 Markowz Karl Heinz Radiator
BE755969A (fr) * 1969-11-26 1971-02-15 Termia Srl Radiateur pour thermosiphon qui aspire l'air froid du bas pour l'ejecter chaud en avant et en haut
CH544920A (de) * 1972-12-18 1973-11-30 Paveg Anstalt Radiator
DE2531552A1 (de) * 1974-07-17 1976-02-12 Boschetti Umberto Heizkoerper, insbesondere radiator
EP0481154A1 (fr) * 1990-10-16 1992-04-22 S.I.R.A. Srl Radiateur bimétallique pour installations de chauffage de bâtiment
ES2174043T3 (es) * 1995-10-30 2002-11-01 Lo Met Loreto Metalli S P A Proceso industrial para la fabricacion de elementos de radiador, modulares, de aluminio inyectado o fundido a presion.

Also Published As

Publication number Publication date
EA201490936A1 (ru) 2014-09-30
ES2557191T3 (es) 2016-01-22
ITMI20112028A1 (it) 2013-05-10
EA025798B1 (ru) 2017-01-30
WO2013068991A8 (fr) 2013-09-19
PL2776774T3 (pl) 2016-03-31
CN104053964A (zh) 2014-09-17
CN104053964B (zh) 2016-04-13
WO2013068991A1 (fr) 2013-05-16
EP2776774A1 (fr) 2014-09-17
PT2776774E (pt) 2016-01-26

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