EP0932008A2 - Heizkörper, insbesondere für Heizungsanlage, mit hoher Innendruckfestigkeit - Google Patents

Heizkörper, insbesondere für Heizungsanlage, mit hoher Innendruckfestigkeit Download PDF

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Publication number
EP0932008A2
EP0932008A2 EP99100364A EP99100364A EP0932008A2 EP 0932008 A2 EP0932008 A2 EP 0932008A2 EP 99100364 A EP99100364 A EP 99100364A EP 99100364 A EP99100364 A EP 99100364A EP 0932008 A2 EP0932008 A2 EP 0932008A2
Authority
EP
European Patent Office
Prior art keywords
tubular portion
section
cross
radiator
fins
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
EP99100364A
Other languages
English (en)
French (fr)
Other versions
EP0932008B1 (de
EP0932008A3 (de
Inventor
Silvestro Niboli
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 Fonderie Italiane Nuova Valsabbia SpA
Original Assignee
Fondital Fonderie Italiane Nuova Valsabbia 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 Fondital Fonderie Italiane Nuova Valsabbia SpA filed Critical Fondital Fonderie Italiane Nuova Valsabbia SpA
Priority to SI9930402T priority Critical patent/SI0932008T1/xx
Publication of EP0932008A2 publication Critical patent/EP0932008A2/de
Publication of EP0932008A3 publication Critical patent/EP0932008A3/de
Application granted granted Critical
Publication of EP0932008B1 publication Critical patent/EP0932008B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F28D1/0233—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 air flow channels
    • 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
    • F28D1/04—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 tubular conduits
    • F28D1/053—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 tubular conduits the conduits being straight
    • F28D1/0535—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 tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05358—Assemblies of conduits connected side by side or with individual headers, e.g. section type radiators
    • 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

Definitions

  • the present invention relates to a radiator, in particular a light-alloy radiator suitable for installation in civil and industrial heating systems, and characterized by a geometry imparting a high resistance to internal pressure.
  • modern heating system radiators may comprise a number of standard modules packed side by side in fluidtight manner and connected to the system piping.
  • the modules may be molded from light alloy, and comprise a tubular portion, along which the heat exchange fluid flows, and a finned portion formed integrally in one piece with the tubular portion, and which receives the heat conveyed by the heat exchange fluid and exchanges this heat with the environment by convection and radiation.
  • the tubular portion normally has a flat cross section, as shown for example in Figure 1, which is normally constant along the whole length (height) of the tubular portion, and is substantially in the form of a lozenge, rectangle or double isosceles trapezium with rounded edges and maximum transverse dimensions measured parallel to two perpendicular axes of symmetry indicated X (major axis, i.e. parallel to the major dimension) and Y (minor axis).
  • Radiators comprising known modules of the above type have a low resistance to internal pressure.
  • known radiators when burst tested, known radiators are damaged by a 14-24 bar internal heat exchange fluid pressure, while radiators capable of withstanding higher pressures normally have a tubular portion with a thicker lateral wall, which increases both weight and cost.
  • a radiator comprising at least one module, in turn comprising a tubular portion with a flat cross section; opposite top and bottom ends having respective lateral hydraulic fittings substantially aligned along a minor axis of the cross section; and a finned portion formed integrally in one piece with a lateral wall of the tubular portion; the finned portion including first fins originating directly from the tubular portion, and second fins originating transversely from respective front ribs in turn originating from the tubular portion and perpendicular to the first fins; the ribs being substantially aligned with a major axis of the cross section; characterized in that the cross section has a dimension, measured along the major axis, smaller than or equal to approximately 45% of the depth of the module, also measured along the major axis.
  • each rib has no fins, and comprises a number of respective ridges connecting the rib both to the lateral wall of the tubular portion, and to a respective second fin carried by the rib and immediately adjacent to the tubular portion.
  • the geometry defined by the above parameters provides for achieving radiators capable of resisting internal pressures of over 35-40 bars, while at the same time maintaining a relatively thin tubular portion wall (2.4 to 4.5 mm) and, hence, light weight and low cost, and maintaining overall module dimensions perfectly compatible with currently used heating systems (module depth of over 80 mm; any module height, measured along the tubular portion axis; and high-density side by side packing in confined spaces).
  • radiator 1 indicates as a whole a radiator for civil and industrial heating systems, and of which only one module 2 is shown for the sake of simplicity.
  • radiator 1 may comprise any number of modules 2 connected side by side in a group and in fluidtight manner to one another.
  • each module 2 comprises a tubular portion 3 having a substantially vertical longitudinal axis and a flat radial cross section 4; and a finned portion 5 formed integrally in one piece with a lateral wall 6 of tubular portion 3.
  • Section 4 is flat by comprising widely differing transverse dimensions measured parallel to two perpendicular axes of symmetry indicated X and Y. More specifically, since the X axis dimension is greater than the Y axis dimension, the X axis is hereinafter referred to as the "major axis", and the Y axis as the "minor axis".
  • tubular portion 3 The opposite top and bottom longitudinal ends 7, 8 of tubular portion 3 are provided, laterally, with respective cylindrical hydraulic fittings 10 substantially aligned along the minor axis Y of the corresponding cross section 4, i.e. with the respective axes of symmetry substantially coaxial with the Y axis of section 4 located at the same height as the axes of fittings 10, i.e. in the same longitudinal position (with respect to the axis of symmetry of portion 3) as fittings 10.
  • Each module 2 is preferably injection molded from light alloy or similar material, for which purpose, the bottom end 8 is open, and is closed, in use, in known manner by a welded plug 8a.
  • Finned portion 5 comprises a first number of fins 11 originating directly from tubular portion 3; and a second number of fins 12 originating transversely from respective front ribs 13, in turn originating from tubular portion 3 and perpendicular to fins 11.
  • Ribs 13 are substantially aligned with the major axis X of all the cross sections 4 of tubular portion 3.
  • each cross section 4 of tubular portion 3 has an inside dimension D, measured along major axis X, smaller than or equal to approximately 45% of the depth P of module 2, also measured parallel to the X axis of the corresponding section 4 ( Figure 2). That is, for each section 4, the following inequality applies : D ⁇ 0.45 P
  • Equation (1) applies in particular to cross section 4 in plane C-C ( Figure 2), i.e. to section 4 corresponding to the bottom end (i.e. closest to fittings 10 of end 8) of a finned portion 15 of tubular portion 3, defined by the longitudinal portion of portion 3 provided with fins 11.
  • Equation (1) also applies to the rest of finned portion 15, except that, modules 2 being injection molded, value D, as any injection expert will know, must be further reduced by the amount due to the draft angle.
  • the thickness S of lateral wall 6 of tubular portion 3 ideally ranges between approximately 2.4 and 4.5 mm. These values refer to a "mean" thickness S calculated as the arithmetic mean of two wall 6 thicknesses measured at diametrically opposite points of respective section 4.
  • each cross section 4 of tubular portion 3 has a dimension L, measured along minor axis Y, equal to or greater than approximately 15% of dimension D of the same cross section 4, measured along the major axis X.
  • L measured along minor axis Y
  • D dimension of the same cross section 4
  • Equation (2) applies in particular to cross section 4 in plane C-C ( Figure 2).
  • each rib 13 has a root portion 20 with no fins 12, and which originates from a corresponding portion, with no fins 11, of lateral wall 6 of tubular portion 3; portion 20 of each front rib 13 comprises a number of respective ridges 22 along the whole length of finned portion 15; and ridges 22 are so formed as to connect each rib 13 both to the portion of lateral wall 6 of tubular portion 3 from which root portion 20 originates, and to the fin 12 closest to root portion 20, i.e. the one on rib 13 immediately adjacent to tubular portion 3.
  • each cross section 4 may vary along the axial extension of tubular portion 3, or may remain substantially constant along the whole axial extension of tubular portion 3, providing, obviously, equations (1) and (2) are met.
  • cross section 4 of tubular portion 3 may therefore be shaped as shown in planes A-A and B-B in Figure 2, i.e. in the form of a substantially rectangular ring with rounded corners and slightly outward-curving sides.
  • plane C-C it may resemble the lozenge shape, but with different dimensional ratios between the major and minor axes X and Y in accordance with equations (1) and (2).

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)
  • Resistance Heating (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Pipe Accessories (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
EP99100364A 1998-01-16 1999-01-15 Heizkörper, insbesondere für Heizungsanlage, mit hoher Innendruckfestigkeit Expired - Lifetime EP0932008B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI9930402T SI0932008T1 (en) 1998-01-16 1999-01-15 Radiator, in particular for heating systems, with a high resistance to internal pressure

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO980038 1998-01-16
IT98TO000038A ITTO980038A1 (it) 1998-01-16 1998-01-16 Radiatore, in particolare per impianti di riscaldamento, presentante a lta restistenza alla pressione interna.

Publications (3)

Publication Number Publication Date
EP0932008A2 true EP0932008A2 (de) 1999-07-28
EP0932008A3 EP0932008A3 (de) 2000-05-10
EP0932008B1 EP0932008B1 (de) 2003-08-06

Family

ID=11416303

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99100364A Expired - Lifetime EP0932008B1 (de) 1998-01-16 1999-01-15 Heizkörper, insbesondere für Heizungsanlage, mit hoher Innendruckfestigkeit

Country Status (10)

Country Link
EP (1) EP0932008B1 (de)
AT (1) ATE246793T1 (de)
CZ (1) CZ299359B6 (de)
DE (1) DE69910089D1 (de)
EA (1) EA001710B1 (de)
IT (1) ITTO980038A1 (de)
PL (1) PL193192B1 (de)
SI (1) SI0932008T1 (de)
SK (1) SK285469B6 (de)
UA (1) UA59364C2 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1471309A2 (de) * 2003-04-24 2004-10-27 Industrie Meccaniche di Alano S.r.l. Heizkörper mit vielseitig anpassbaren Abdeckungen, insbesondere für Hausheizungssysteme
ITUA20164170A1 (it) * 2016-06-07 2017-12-07 Fondital Spa Dispositivo di riscaldamento ad alta efficienza

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH556523A (de) * 1974-05-20 1974-11-29 Paveg Anstalt Gliederradiator.
DE2703632A1 (de) * 1977-01-28 1978-08-10 Schiedel Kg Waermetauschrohr eines radiators fuer raumtemperierung
CH660913A5 (en) * 1981-08-11 1987-05-29 Schiedel Gmbh & Co Finned tube for a heat exchanger, in particular a space heater

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH556523A (de) * 1974-05-20 1974-11-29 Paveg Anstalt Gliederradiator.
DE2703632A1 (de) * 1977-01-28 1978-08-10 Schiedel Kg Waermetauschrohr eines radiators fuer raumtemperierung
CH660913A5 (en) * 1981-08-11 1987-05-29 Schiedel Gmbh & Co Finned tube for a heat exchanger, in particular a space heater

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1471309A2 (de) * 2003-04-24 2004-10-27 Industrie Meccaniche di Alano S.r.l. Heizkörper mit vielseitig anpassbaren Abdeckungen, insbesondere für Hausheizungssysteme
EP1471309A3 (de) * 2003-04-24 2004-12-08 Industrie Meccaniche di Alano S.r.l. Heizkörper mit vielseitig anpassbaren Abdeckungen, insbesondere für Hausheizungssysteme
ITUA20164170A1 (it) * 2016-06-07 2017-12-07 Fondital Spa Dispositivo di riscaldamento ad alta efficienza
WO2017212415A1 (en) * 2016-06-07 2017-12-14 Fondital S.P.A. High efficiency heating device
EA037896B1 (ru) * 2016-06-07 2021-06-03 Фондитал С.П.А. Высокоэффективное нагревательное устройство

Also Published As

Publication number Publication date
ITTO980038A1 (it) 1999-07-16
ATE246793T1 (de) 2003-08-15
SK285469B6 (sk) 2007-02-01
EA199900037A3 (ru) 1999-12-29
DE69910089D1 (de) 2003-09-11
EP0932008B1 (de) 2003-08-06
CZ299359B6 (cs) 2008-07-02
SI0932008T1 (en) 2003-12-31
EP0932008A3 (de) 2000-05-10
EA199900037A2 (ru) 1999-08-26
UA59364C2 (uk) 2003-09-15
CZ13299A3 (cs) 1999-09-15
PL193192B1 (pl) 2007-01-31
SK6199A3 (en) 2000-02-14
PL330858A1 (en) 1999-07-19
EA001710B1 (ru) 2001-06-25

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