WO2011012978A2 - Heating radiator element, in particular made of die-cast aluminium, and method for closing an end part of a heating radiator element - Google Patents

Heating radiator element, in particular made of die-cast aluminium, and method for closing an end part of a heating radiator element Download PDF

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Publication number
WO2011012978A2
WO2011012978A2 PCT/IB2010/001852 IB2010001852W WO2011012978A2 WO 2011012978 A2 WO2011012978 A2 WO 2011012978A2 IB 2010001852 W IB2010001852 W IB 2010001852W WO 2011012978 A2 WO2011012978 A2 WO 2011012978A2
Authority
WO
WIPO (PCT)
Prior art keywords
plug
end part
seat
flared
lateral surface
Prior art date
Application number
PCT/IB2010/001852
Other languages
French (fr)
Other versions
WO2011012978A3 (en
Inventor
Massimo Vampini
Original Assignee
Fondital S.P.A.
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 S.P.A. filed Critical Fondital S.P.A.
Publication of WO2011012978A2 publication Critical patent/WO2011012978A2/en
Publication of WO2011012978A3 publication Critical patent/WO2011012978A3/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
    • F28D1/04—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
    • F28D1/05308—Assemblies of conduits connected side by side or with individual headers, e.g. section type radiators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/0002—Means for connecting central heating radiators to circulation pipes
    • F24D19/0078—Plugs
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0035—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for domestic or space heating, e.g. heating 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
    • F28F2220/00—Closure means, e.g. end caps on header boxes or plugs on conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/12—Fastening; Joining by methods involving deformation of the elements

Definitions

  • HEATING RADIATOR ELEMENT IN PARTICULAR MADE OF DIE-CAST ALUMINIUM, AND METHOD FOR CLOSING AN END PART OF A HEATING RADIATOR ELEMENT
  • the present invention relates to a heating radiator element, and to a method for closing an end part of a heating radiator element .
  • the invention applies to radiator elements typically made of aluminium, manufactured by die-casting.
  • a die-cast aluminium radiator is normally formed by a battery of elements coupled to one another to form a radiator of suitable dimensions; each element has a substantially tubular body that extends along an axis and has an end part that, for constructional requirements, is open at the bottom; the end part hence has a bottom opening set along the axis, as well as, typically, a pair of opposite lateral holes to enable connection of the element to other elements of the same type .
  • the traditional solution consists in welding a lid around a front edge of the bottom opening. This solution is not altogether satisfactory in so far as it requires execution of a weld with all the drawbacks associated thereto.
  • known closing solutions do not take into account the need to prevent, during internal treatments that are carried out by dipping the element in a liquid bath, the formation of air pockets that prevent a complete treatment.
  • these treatments are carried out by dipping the element in a position set upside down with respect to the position of use, i.e., with the end part provided with the bottom opening set facing upwards,- consequently, precisely in the end part an air pocket is formed that prevents access and deposition of the treatment liquid in this area.
  • An aim of the present invention is to provide an element of a heating radiator and a method for closing an end part of an element of a heating radiator that will be free from the drawbacks of the known art highlighted above; in particular, an aim of the invention is to provide a radiator element having a bottom opening, which is closed in a simple and fully effective way and makes it possible to bestow on the end part of the radiator element a particular aesthetic appearance.
  • Yet a further aim of the invention is to provide a radiator element and a corresponding closing method that will enable a complete treatment of the internal surfaces of the element by immersion.
  • the present invention hence regards an element of a heating radiator, in particular an element provided via die-casting of aluminium, and a method for closing an end part of said radiator element, as defined in basic terms in the annexed Claim 1 and Claim 8, respectively.
  • the element of a heating radiator in accordance with the invention is provided with a closing plug that is simple and fully effective and that is applied in a simple, fast, and inexpensive way, without requiring relatively long and complex operations and at the same time enabling aesthetic solutions of particular quality.
  • the invention prevents, when the element is dipped in a treatment composition in the usual position reversed with respect to the position of use or in any case during filling of the internal chamber with a treatment composition, formation of air pockets precisely within the end part of the element closed by the plug. In this way, it is possible to treat completely all the internal surfaces of the element.
  • Figure 1 is a partial perspective view of an element of a heating radiator in accordance with the invention, and shows specifically an end part of the radiator element provided with a closing plug;
  • Figure 2 is a view in longitudinal section of the radiator element of Figure 1;
  • Figure 3 is a view in longitudinal section of the plug forming part of the element of Figure 1.
  • Figures 1 and 2 designated as a whole by 1 is an element of a heating radiator;
  • the element 1 has a body 2 made of metal material, in particular made of aluminium and for example die- cast aluminium;
  • the body 2 is a substantially tubular body that comprises a main tubular portion 3, which extends longitudinally along an axis A that, with reference to the normal position of use of the element 1, is substantially vertical;
  • the element 1 is provided with an internal chamber 4 for the passage of water, with transverse connector sleeves 5 for connection to other radiator elements and/or to a hydraulic circuit, and with a plurality of radiant fins and/or plates 6 variously connected to one another and/or to the body 2 and specifically to the main portion 3.
  • the main portion 3 of the element 1 has a cross section that is substantially circular, possibly variable along the axis A; it is in any case understood that the main portion 3 can also have a cross section that is oval or elliptical, or of some other shape.
  • the element 1 comprises an end part 10 located at a longitudinal end 11 of the element 1, for example a bottom end (once again with reference to the normal position of use of the element 1) .
  • the end part 10 is substantially tubular and extends substantially along the axis A and has a bottom opening 12 set along the axis A and substantially transverse to the axis A and delimited by a front edge 13.
  • the end part 10 is delimited by a side wall 16, which preferably, but not necessarily, has a circular, or else substantially oval or elliptical, cross section and comprises at least one internally flared portion 15, which diverges towards the opening 12 and converges towards the inside of the element 1 (i.e., towards the chamber 4) and defines internally a flared seat 17; preferably, moreover, the side wall 16 diverges also outwards towards the front edge 13.
  • the opening 12 is closed by a plug 20 at least partially inserted in the end part 10 and specifically in the seat 17 and provided with at least one seal ring 21 set between the plug 20 and the end part 10; in particular, the seal ring 21 is a radial seal ring set within the seat 17 (and hence within the end part 10) and is radially set between an external lateral surface 22 of the plug 20 and an internal lateral surface 23 of the seat 17, i.e., of the end part 10.
  • the plug 20 is constituted by a monolithic body, in particular made of aluminium, which is shaped substantially like a disk and has a substantially frusto-conical or generically flared shape, corresponding to the shape of the flared portion 15 of the end part 10.
  • the surface 22 is hence generically flared and in particular substantially frusto-conical, or comprises at least one portion having said shape.
  • the plug 20 is entirely housed within the end part 10 and the surface 22 of the plug 20 is substantially in contact with the internal surface 23 of the end part 10.
  • the plug 20 extends between two opposite axial ends provided respectively with an internal terminal closing surface 28, substantially orthogonal to the axis A and facing the inside of the element 1 (i.e., the chamber 4), and an external front surface 29, opposite and substantially parallel to the terminal closing surface 28 and facing the outside of the element 1.
  • the front surface 29 is delimited by an annular perimetral edge 35 that is chamfered radially in a direction opposed to the flaring of the surface 22; the perimetral edge 35 hence has a chamfered portion 36 that is convergent towards the outside of the element 1, i.e., towards the front surface 29.
  • the seal ring 21 for example a seal ring of an 0-ring type made of elastomeric material, is fitted around the surface 22, possibly housed in a seat 37 formed on the surface 22 (as illustrated in the figures) and/or on the surface 23 (not illustrated) , and extends radially from the surface 22 towards the surface 23 so as to seal the end part 10 in a fluid-tight way.
  • the plug 20 is mechanically coupled to the end part 10 via the connection portion 19, which is obtained by plastic deformation of the free end portion 18 of the side wall 16.
  • connection portion 19 is bent around the perimetral edge 35 of the plug 20 and co-operates with the chamfered portion 36 of the perimetral edge 35 by bearing thereupon, pushing the plug 20 in the seat 17 and specifically pressing the surface 22 of the plug 20 against the surface 23 of the seat 17.
  • the bottom opening 12 of the end part 10 is closed in the way described in what follows.
  • the body 2 is initially provided with the free end portion 18 substantially aligned to the rest of the side wall 16; in the example shown, the entire side wall 16, including the portion 18, hence diverges outwards towards the front edge 13.
  • the portion 18 has in this undeformed condition a cross section sufficient for insertion of the plug 20; the plug 20 (provided with the seal ring 21) is then inserted in the seat 17 through the opening 12.
  • the portion 18 is plastically deformed to block the plug 20 in the seat 17.
  • the operation of plastic deformation is advantageously carried out, for example, via a tool provided with an axial pusher element that presses on the front surface 29 of the plug 20, and with one or more rotating members that bend the portion 18 around the perimetral edge 35 of the plug 20.
  • the portion 18 constitutes the connection portion 19 bent back towards the axis A and coupled to the chamfered portion 36 of the plug 20; preferably, the plug 20 is entirely inserted in the end part 10 and specifically in the seat 17, and the front surface 29 of the plug is substantially flush with the front edge 13.
  • the end part 10 has, in addition to the opening 12, a pair of opposite holes 40, set on opposite sides of the end part 10 and substantially orthogonal to the opening 12 and to the axis A; the holes 40 are delimited by respective edges 41, for example substantially circular, and hydraulically connect the chamber 4 with the transverse connector sleeves 5.
  • the plug 20 extends within the end part 10 so as to come into the close proximity of the holes 40 in order to prevent formation of air pockets during dipping of the element 1 in a generic treatment bath.
  • the plug 20 is shaped in such a way that, once it is fixed to the end part 10, the terminal closing surface 28 is set in the close proximity of respective proximal stretches 42 of the edges 41 facing the opening 12 and set closest to the opening 12.
  • the terminal closing surface 28 is substantially tangential to the holes 40, and/or the terminal closing surface 28 lies in a plane that is substantially tangential to the edges 41 or is secant with respect to the edges 41 (specifically, the proximal stretches 42 of the edges 41) .
  • connection portion 19 is constituted by a continuous annular portion
  • the plug 20 can be engaged by one or more connection portions 19 of some other shape, once again made of a single piece with the end part 10 and obtained by plastic deformation of the free end portion 18 of the side wall 16.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Resistance Heating (AREA)

Abstract

An element (1) of a heating radiator has a substantially tubular end part (10), which extends along an axis (A) and has a bottom opening (12) closed by a plug (20); a radial seal ring (21) is set within the end part (10) and radially set between an external lateral surface (22) of the plug (20) and an internal lateral surface (23) of the end part (10); the plug (20) is mechanically coupled to the end part (10) via at least one connection portion (19), which is constituted by a free-end portion (18) of the end part (10) that is plastically deformed around a perimetral edge (35) of the plug (20) to grip the plug (20) against the end part (10).

Description

"HEATING RADIATOR ELEMENT, IN PARTICULAR MADE OF DIE-CAST ALUMINIUM, AND METHOD FOR CLOSING AN END PART OF A HEATING RADIATOR ELEMENT"
TECHNICAL FIELD
The present invention relates to a heating radiator element, and to a method for closing an end part of a heating radiator element .
In particular, the invention applies to radiator elements typically made of aluminium, manufactured by die-casting.
BACKGROUND ART
As is known, a die-cast aluminium radiator is normally formed by a battery of elements coupled to one another to form a radiator of suitable dimensions; each element has a substantially tubular body that extends along an axis and has an end part that, for constructional requirements, is open at the bottom; the end part hence has a bottom opening set along the axis, as well as, typically, a pair of opposite lateral holes to enable connection of the element to other elements of the same type .
Various systems are known for closing the bottom opening of a radiator element .
The traditional solution consists in welding a lid around a front edge of the bottom opening. This solution is not altogether satisfactory in so far as it requires execution of a weld with all the drawbacks associated thereto.
Other solutions, which envisage instead a mechanical engagement between a lid and the end part of the radiator element, are not fully satisfactory in terms of effectiveness of hydraulic tightness and/or of costs and simplicity of construction, as well as, in some cases, from the aesthetic standpoint .
In addition, known closing solutions do not take into account the need to prevent, during internal treatments that are carried out by dipping the element in a liquid bath, the formation of air pockets that prevent a complete treatment.
Typically, in fact, these treatments (for example a coating for anti-corrosion purposes) are carried out by dipping the element in a position set upside down with respect to the position of use, i.e., with the end part provided with the bottom opening set facing upwards,- consequently, precisely in the end part an air pocket is formed that prevents access and deposition of the treatment liquid in this area.
DISCLOSURE OF INVENTION
An aim of the present invention is to provide an element of a heating radiator and a method for closing an end part of an element of a heating radiator that will be free from the drawbacks of the known art highlighted above; in particular, an aim of the invention is to provide a radiator element having a bottom opening, which is closed in a simple and fully effective way and makes it possible to bestow on the end part of the radiator element a particular aesthetic appearance.
Yet a further aim of the invention is to provide a radiator element and a corresponding closing method that will enable a complete treatment of the internal surfaces of the element by immersion.
The present invention hence regards an element of a heating radiator, in particular an element provided via die-casting of aluminium, and a method for closing an end part of said radiator element, as defined in basic terms in the annexed Claim 1 and Claim 8, respectively. The element of a heating radiator in accordance with the invention is provided with a closing plug that is simple and fully effective and that is applied in a simple, fast, and inexpensive way, without requiring relatively long and complex operations and at the same time enabling aesthetic solutions of particular quality. In addition, the invention prevents, when the element is dipped in a treatment composition in the usual position reversed with respect to the position of use or in any case during filling of the internal chamber with a treatment composition, formation of air pockets precisely within the end part of the element closed by the plug. In this way, it is possible to treat completely all the internal surfaces of the element.
BRIEF DESCRIPTION OF THE DRAWINGS
Further characteristics and advantages of the present invention will emerge clearly from the ensuing description of a non-limiting example of embodiment thereof, with reference to the figures of the annexed drawings, wherein:
Figure 1 is a partial perspective view of an element of a heating radiator in accordance with the invention, and shows specifically an end part of the radiator element provided with a closing plug;
Figure 2 is a view in longitudinal section of the radiator element of Figure 1; and
Figure 3 is a view in longitudinal section of the plug forming part of the element of Figure 1.
BEST MODE FOR CARRYING OUT THE INVENTION
In Figures 1 and 2 designated as a whole by 1 is an element of a heating radiator; the element 1 has a body 2 made of metal material, in particular made of aluminium and for example die- cast aluminium; the body 2 is a substantially tubular body that comprises a main tubular portion 3, which extends longitudinally along an axis A that, with reference to the normal position of use of the element 1, is substantially vertical; the element 1 is provided with an internal chamber 4 for the passage of water, with transverse connector sleeves 5 for connection to other radiator elements and/or to a hydraulic circuit, and with a plurality of radiant fins and/or plates 6 variously connected to one another and/or to the body 2 and specifically to the main portion 3.
Preferably, but not necessarily, the main portion 3 of the element 1 has a cross section that is substantially circular, possibly variable along the axis A; it is in any case understood that the main portion 3 can also have a cross section that is oval or elliptical, or of some other shape.
The element 1 comprises an end part 10 located at a longitudinal end 11 of the element 1, for example a bottom end (once again with reference to the normal position of use of the element 1) .
The end part 10 is substantially tubular and extends substantially along the axis A and has a bottom opening 12 set along the axis A and substantially transverse to the axis A and delimited by a front edge 13. The end part 10 is delimited by a side wall 16, which preferably, but not necessarily, has a circular, or else substantially oval or elliptical, cross section and comprises at least one internally flared portion 15, which diverges towards the opening 12 and converges towards the inside of the element 1 (i.e., towards the chamber 4) and defines internally a flared seat 17; preferably, moreover, the side wall 16 diverges also outwards towards the front edge 13.
A free end portion 18 of the side wall 16 (and hence of the end part 10), provided with the front edge 13, constitutes a connection portion 19 bent back towards the axis A and convergent towards, the front edge 13, i.e., inclined in a direction opposite to the side wall 16. The opening 12 is closed by a plug 20 at least partially inserted in the end part 10 and specifically in the seat 17 and provided with at least one seal ring 21 set between the plug 20 and the end part 10; in particular, the seal ring 21 is a radial seal ring set within the seat 17 (and hence within the end part 10) and is radially set between an external lateral surface 22 of the plug 20 and an internal lateral surface 23 of the seat 17, i.e., of the end part 10.
In the example shown, the plug 20 is constituted by a monolithic body, in particular made of aluminium, which is shaped substantially like a disk and has a substantially frusto-conical or generically flared shape, corresponding to the shape of the flared portion 15 of the end part 10. The surface 22 is hence generically flared and in particular substantially frusto-conical, or comprises at least one portion having said shape.
Preferably, the plug 20 is entirely housed within the end part 10 and the surface 22 of the plug 20 is substantially in contact with the internal surface 23 of the end part 10.
With reference also to Figure 3, the plug 20 extends between two opposite axial ends provided respectively with an internal terminal closing surface 28, substantially orthogonal to the axis A and facing the inside of the element 1 (i.e., the chamber 4), and an external front surface 29, opposite and substantially parallel to the terminal closing surface 28 and facing the outside of the element 1.
The front surface 29 is delimited by an annular perimetral edge 35 that is chamfered radially in a direction opposed to the flaring of the surface 22; the perimetral edge 35 hence has a chamfered portion 36 that is convergent towards the outside of the element 1, i.e., towards the front surface 29. The seal ring 21, for example a seal ring of an 0-ring type made of elastomeric material, is fitted around the surface 22, possibly housed in a seat 37 formed on the surface 22 (as illustrated in the figures) and/or on the surface 23 (not illustrated) , and extends radially from the surface 22 towards the surface 23 so as to seal the end part 10 in a fluid-tight way.
The plug 20 is mechanically coupled to the end part 10 via the connection portion 19, which is obtained by plastic deformation of the free end portion 18 of the side wall 16.
In particular, the connection portion 19 is bent around the perimetral edge 35 of the plug 20 and co-operates with the chamfered portion 36 of the perimetral edge 35 by bearing thereupon, pushing the plug 20 in the seat 17 and specifically pressing the surface 22 of the plug 20 against the surface 23 of the seat 17.
In accordance with the invention, the bottom opening 12 of the end part 10 is closed in the way described in what follows.
The body 2 is initially provided with the free end portion 18 substantially aligned to the rest of the side wall 16; in the example shown, the entire side wall 16, including the portion 18, hence diverges outwards towards the front edge 13.
The portion 18 has in this undeformed condition a cross section sufficient for insertion of the plug 20; the plug 20 (provided with the seal ring 21) is then inserted in the seat 17 through the opening 12.
Next, the portion 18 is plastically deformed to block the plug 20 in the seat 17. The operation of plastic deformation is advantageously carried out, for example, via a tool provided with an axial pusher element that presses on the front surface 29 of the plug 20, and with one or more rotating members that bend the portion 18 around the perimetral edge 35 of the plug 20.
Once deformed, the portion 18 constitutes the connection portion 19 bent back towards the axis A and coupled to the chamfered portion 36 of the plug 20; preferably, the plug 20 is entirely inserted in the end part 10 and specifically in the seat 17, and the front surface 29 of the plug is substantially flush with the front edge 13.
According to a further aspect of the invention, the end part 10 has, in addition to the opening 12, a pair of opposite holes 40, set on opposite sides of the end part 10 and substantially orthogonal to the opening 12 and to the axis A; the holes 40 are delimited by respective edges 41, for example substantially circular, and hydraulically connect the chamber 4 with the transverse connector sleeves 5.
The plug 20 extends within the end part 10 so as to come into the close proximity of the holes 40 in order to prevent formation of air pockets during dipping of the element 1 in a generic treatment bath.
In particular, the plug 20 is shaped in such a way that, once it is fixed to the end part 10, the terminal closing surface 28 is set in the close proximity of respective proximal stretches 42 of the edges 41 facing the opening 12 and set closest to the opening 12.
Preferably, the terminal closing surface 28 is substantially tangential to the holes 40, and/or the terminal closing surface 28 lies in a plane that is substantially tangential to the edges 41 or is secant with respect to the edges 41 (specifically, the proximal stretches 42 of the edges 41) .
It is then understood that modifications and variations may be made to what has been described and illustrated herein, without thereby departing from the scope of the invention as defined in the annexed claims.
For instance, even though in the example described the connection portion 19 is constituted by a continuous annular portion, it is clear that the plug 20 can be engaged by one or more connection portions 19 of some other shape, once again made of a single piece with the end part 10 and obtained by plastic deformation of the free end portion 18 of the side wall 16.

Claims

1. A heating radiator element (1), having a body (2) provided with an internal chamber (4) for the passage of water and comprising a substantially tubular end part (10) , which extends along an axis (A) and has a bottom opening (12) closed by a plug (20) provided with at least one radial seal ring (21) that is set within the end part (10) ; the plug (20) being mechanically coupled to the end part (10) via at least one connection portion (19) , which is constituted by a free-end portion (18) of the end part (10) that is plastically deformed around a perimetral edge (35) of the plug (20) to grip the plug (20) against the end part (10) ; the element being characterized in that:
- the end part (10) comprises at least one internally flared portion (15) , which diverges towards the opening (12) and defines internally a flared seat (17) , delimited by an internal lateral surface (23) that is inclined with respect to the axis (A) ;
- the plug (20) is housed in the seat (17) and has a substantially frusto-conical or generically flared shape, corresponding to the shape of the flared portion (15) defining the seat (17) ;
- the connection portion (19) is bent around the perimetral edge (35) of the plug (20) and co-operates with a chamfered portion (36) of the perimetral edge (35) by bearing thereupon, pushing the plug (20) in the seat (17) and pressing the seal ring (21) against the inclined internal lateral surface (23) of the seat (17) ; and
- the seal ring (21) is radially set between the internal lateral surface (23) of the end part (10) and an external lateral surface (22) of the plug (20) .
2. The element according to Claim 1, wherein the plug (20) is entirely inserted in the seat (17) , and the plug (20) has an external front surface (29) , facing the outside of the element (1) , which is substantially flush with a front edge (13) of the free-end portion (18) of the end part (10) .
3. The element according to Claim 1 or Claim 2, wherein the plug (20) is engaged by one or more connection portions (19) made of a single piece with the end part (10) and obtained by plastic deformation of the free-end portion (18) .
4. The element according to any one of the preceding claims, wherein the plug (20) is made of aluminium, as is the body (2) of the element.
5. The element according to any one of the preceding claims, wherein the end part (10) has a pair of opposite holes (40) , which are delimited by respective edges (41) and are set on opposite sides of the end part (10) and hydraulically connect the chamber (4) with respective connector sleeves (5) ; and the plug (20) extends within the end part (10) with an axial end provided with a terminal closing surface (28) that is set in close proximity to said edges (41) .
6. The element according to Claim 5, wherein the terminal closing surface (28) is substantially tangential to the holes (40) and/or lies in a plane that is substantially tangential to the edges (41) or is secant with respect to the edges (41) .
7. A method for closing an end part of an element of a heating radiator, the radiator element (1) having a body (2) provided with an internal chamber (4) for the passage of water and comprising a substantially tubular end part (10) , which extends along an axis (A) and has a bottom opening (12) ; the method being characterized in that it comprises the steps of:
- providing a radiator element (1) having an end part (10) that has a free-end portion (18) having a cross section sufficient for insertion of a plug (20) ; the end part (10) comprising at least one internally flared portion (15) , which diverges towards the opening (12) and defines internally a flared seat (17) , delimited by an internal lateral surface (23) that is inclined with respect to the axis (A) ;
- providing a plug (20) that has a substantially frusto- conical or generically flared shape, corresponding to the shape of the flared portion (15) defining the seat (17) , and has a perimetral edge (35) having a chamfered portion (36) ; the plug (20) being provided with a radial seal ring (21) ;
- introducing at least partially the plug (20) within the end part (10) through the free-end portion (18) ; and
- mechanically coupling the plug (20) to the end part (10) by subjecting to plastic deformation the free-end portion (18) of the end part (10) around a perimetral edge (35) of the plug (20) , to form at least one connection portion (19) that grips the plug (20) against the end part (10) ; the connection portion (19) being bent around the perimetral edge (35) of the plug (20) and co-operating with the chamfered portion (36) of the perimetral edge (35) by bearing thereupon, in such a way as to push the plug (20) in the seat (17) and press the seal ring (21) against the inclined internal lateral surface (23) of the seat (17) .
PCT/IB2010/001852 2009-07-28 2010-07-27 Heating radiator element, in particular made of die-cast aluminium, and method for closing an end part of a heating radiator element WO2011012978A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2009A001332 2009-07-28
ITMI2009A001332A IT1394989B1 (en) 2009-07-28 2009-07-28 HEATING ELEMENT OF RADIATOR, IN PARTICULAR IN DIE-CAST ALUMINUM, AND METHOD OF CLOSING A TERMINAL PART OF A HEATING RADIATOR ELEMENT

Publications (2)

Publication Number Publication Date
WO2011012978A2 true WO2011012978A2 (en) 2011-02-03
WO2011012978A3 WO2011012978A3 (en) 2011-06-23

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PCT/IB2010/001852 WO2011012978A2 (en) 2009-07-28 2010-07-27 Heating radiator element, in particular made of die-cast aluminium, and method for closing an end part of a heating radiator element

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20110345A1 (en) * 2011-03-04 2012-09-05 Fondital Spa ADAPTER DEVICE FOR CONNECTING A RADIATOR ELEMENT TO A HYDRAULIC SYSTEM
ITMI20120804A1 (en) * 2012-05-10 2013-11-11 Fondital Spa RADIATOR ELEMENT FOR HEATING AND CLOSING METHOD OF A TERMINAL PART OF A HEATING RADIATOR ELEMENT

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2134365A1 (en) * 1971-04-30 1972-12-08 Dmc Muneratti Alberto
GB2167549A (en) * 1984-11-24 1986-05-29 Holden William J Central heating radiator and method of construction thereof
US5224358A (en) * 1990-10-04 1993-07-06 Nippondenso Co., Ltd. Refrigerating apparatus and modulator
US5653447A (en) * 1995-07-26 1997-08-05 Cress; Steven B. Vacuum/pressure seal method and apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2134365A1 (en) * 1971-04-30 1972-12-08 Dmc Muneratti Alberto
GB2167549A (en) * 1984-11-24 1986-05-29 Holden William J Central heating radiator and method of construction thereof
US5224358A (en) * 1990-10-04 1993-07-06 Nippondenso Co., Ltd. Refrigerating apparatus and modulator
US5653447A (en) * 1995-07-26 1997-08-05 Cress; Steven B. Vacuum/pressure seal method and apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20110345A1 (en) * 2011-03-04 2012-09-05 Fondital Spa ADAPTER DEVICE FOR CONNECTING A RADIATOR ELEMENT TO A HYDRAULIC SYSTEM
ITMI20120804A1 (en) * 2012-05-10 2013-11-11 Fondital Spa RADIATOR ELEMENT FOR HEATING AND CLOSING METHOD OF A TERMINAL PART OF A HEATING RADIATOR ELEMENT
WO2013168143A1 (en) * 2012-05-10 2013-11-14 Fondital S.P.A. Heating radiator element and method for closing an end part op a heating radiator element

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ITMI20091332A1 (en) 2011-01-29
WO2011012978A3 (en) 2011-06-23

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