Radiator with radiant plates having at least one convective surface, sheet band and procedure for realising the aforementioned convective surface

Abstract

 A radiator with radiant plates (1) of the type comprising one or more shells (2) for containing a fluid, each defining at least one collector for the input (3) and one for the output (4) of said fluid connected with each other by a plurality of channels (5) which are mutually separated by sunken portions (6) of said shells (2). The radiator comprises a convective surface (7) connected to the shells (2), which comprises a first portion (8) connected to the channels (5) and/or to said sunken portions (6), and a second portion (9) connected to at least one of the input and/or output collectors (3, 4). A sheet band (20) for realising a convective surface (7) comprises a plurality of blanks (21) arranged next to each other and aligned with a substantially constant pitch. A procedure for realising the convective surface to be connected to the shells of a radiator with radiant plates consists of realising on a sheet band first and second folds aligned with each other. The first folds are realised through a drawing operation of first portions of the band and the second folds are obtained by realising pairs of blanks and then, through a drawing and profiling operation of second portions of the band.

Description

[0001] The present invention refers to a radiator with radiant plates having at least one convective surface, to a sheet band and to a procedure for realising the aforementioned convective surface.

[0002] Radiators which currently exist usually comprise one or more containment shells which each define two collectors connected to each other by a plurality of water channels.

[0003] Between the collectors, through the channels, one or more convective surfaces realised in sheet formed from a band with a configuration such as to adapt to the profile of the shells of the heating body are connected, each one to every shell.

[0004] The convective surfaces generate an increase in thermal yield of the heating body, favouring heat transmission by conduction and by convection.

[0005] Currently the convective surface is applied to the shells of the heating body in two different ways which differ from each other according to the type of contact which is made between the surfaces of the shells and the convective surface:

• there is a contact on dry and wet when the contact zone of the convective surface to the shells involves both the dry surface of the heating body (spot welding area between the half-shells which define each shell), and the wet surface or water channel (ducts of the shells into which the water passes); in practice such a connection is made in the area of the water channels but not in that of the collectors;
• there is contact only on wet when the connection of the convective surface to the shells involves the water channels and the collectors; such a connection is made in the area of the collectors and in that of the water channels.

[0006] Each of the two solutions is used individually, i.e. alternatively one or the other, according to the pitch of the water channels, sheet development and different height and depth of the shells.

[0007] In practice, therefore, the heat exchange which one manages to realise and, therefore, the thermal yield of the heating body, is not optimised.

[0008] The technical task proposed of the present invention is, therefore, that of realising a radiator with radiant plates having at least one convective surface, a sheet band and a procedure for realising the aforementioned convective surface which allow the aforementioned technical drawbacks of the prior art to be eliminated.

[0009] In this technical task a purpose of the invention is that of realising a radiator with radiant plates having at least one convective surface which has a very high thermal yield.

[0010] Another purpose of the invention is that of realising a radiator which has a convective surface which is very rigid, regular and robust.

[0011] A further purpose of the invention is that of indicating a procedure for realising the aforementioned convective surface which is very cost-effective.

[0012] The last but not least purpose of the invention is that of realising a sheet band which, using the indicated procedure, allows the convective surface according to the finding to be realised.

[0013] The technical task, as well as these and other purposes, according to the present invention are achieved by realising a radiator with radiant plates of the type comprising one or more shells for containing a fluid, each defining at least one collector for the input and one for the output of said fluid connected with each other by a plurality of channels which are mutually separated by sunken portions of said shells, characterised in that said at least one convective surface comprises at least one first portion connected to said channels and/or to said sunken portions, and at least one second portion connected to at least one of said input and/or output collectors.

[0014] In a suitable manner the present finding also refers to a sheet band for realising a convective surface, characterised in that it comprises a plurality of blanks arranged next to each other and aligned with a substantially constant pitch.

[0015] Advantageously, the finding also refers to a procedure for realising a convective surface to be connected to the shells of a radiator with radiant plates, characterised in that it consists of realising on a sheet band first and second folds aligned with each other, said first folds being realised through a drawing operation of first portions of said band and said second folds being obtained by realising pairs of blanks and then, through a drawing and profiling operation of second portions of said band.

[0016] Other characteristics of the present invention are defined, moreover, in the other claims.

[0017] Advantageously, the radiator with radiant plates according to the finding has very large contact zones between the convective surfaces and the shells which, in particular, involve both the central part of the shells (i.e. making a contact of the dry and wet type) and the ends of the shells (making a contact of the just wet type).

[0018] Further characteristics and advantages of the invention shall become clearer from the description of a preferred but not exclusive embodiment of the radiator with radiant plates having at least one convective surface, of the sheet band and of the procedure for realising the aforementioned convective surface according to the finding, where the radiator, the convective surface and the sheet band are illustrated for indicating and not limiting purposes in the attached drawings, in which:

• figure 1 shows a front view of a radiator with radiant plates according to the finding;
• figure 2 shows a section view realised along the line II-II of figure 1;
• figure 3 shows a section view realised along the line III-III of figure 1;
• figure 4 shows a side view (enlarged) of a convective surface of the radiator with radiant plates according to the finding;
• figure 5 shows an enlarged profile view of the convective surface of the radiator according to the finding; and
• figure 6 shows a cut sheet band for realising the convective surface.

[0019] With reference to the quoted figures, a radiator with radiant plates having at least one convective surface is shown wholly indicated with reference numeral 1.

[0020] The radiator 1 comprises two shells 2 for containing fluid, each defining an input collector 3 and an output collector 4 of the fluid, connected to each other by a plurality of water channels 5 which are mutually separated by sunken portions 6 of the shells 2.

[0021] Moreover, the radiator 1 of the example shown comprises two convective surfaces 7 each connected, in this case internally, to the shells 2.

[0022] Such convective surfaces 7 comprise a first portion 8 connected to the channels 5 and/or to the sunken surfaces 6 and at least one second portion 9 connected to one of the collectors for the input 3 and/or output 4 of the fluid.

[0023] In a preferred embodiment, the convective surfaces 7 comprise the central portion 8 from which extend two portions 9 each connected to one of the two collectors 3, 4.

[0024] The first portion 8 of the convective surface 7 comprises a folded sheet which defines first and second folds 10, 11 with a substantially transversal development, where the first folds 10 have a lower height with respect to the second folds 11.

[0025] The second portions 9 of the convective surface 7, on the other hand, comprise substantially transversal folds (detail not shown) which all substantially have the same height.

[0026] In an embodiment, the first portion 8 and the second portions 9 are realised in three distinct elements associated with each other; however, in a preferred embodiment of the radiator 1 according to the finding the portions 8 and 9 are all realised in a single piece.

[0027] In particular, in such an embodiment the convective surface 7 comprises a plurality of slits 12 realised between the first portion 8 and the second portions 9.

[0028] Advantageously, the first portion 8 of the convective surface 7 has sides 13 in correspondence with the slits 12.

[0029] This allows the first portion 8 of the convective surface 7 to be associated with the sunken portions 6 and the second portions 9 to be associated with the collectors 3, 4 without involving the joint area between the two.

[0030] Moreover, the convective surface 7 has at its longitudinal ends, protruding portions 14 for the connection of the convective surface 7 itself to the shells 2.

[0031] The convective surface 7 according to the finding is realised by working, according to the procedure also object of the present invention, a sheet band 20 shown in figure 6.

[0032] The band 20 of figure 6 comprises a plurality of shaped blanks 21, arranged next to each other aligned with a substantially constant pitch, suitable for realising the slits 12.

[0033] Such blanks 21 have a substantially trapezoidal shape, with inclined sides 22 which are directed towards the centre of the band 20.

[0034] The band 20 is shaped so as to realise at its longitudinal end the protruding portions 14.

[0035] The present invention also refers to a procedure for realising the convective surface to be connected to the shells of a radiator with plates.

[0036] The procedure consists of realising on a sheet band 20 first and second folds 10, 11 aligned with each other.

[0037] The first folds 10 are realised through a drawing operation of first portions of the band 20 and the second folds 11 are obtained by realising pairs of blanks 21 and, then through a drawing and profiling operation of second portions of the band 20.

[0038] Preferably, the first and second folds 10, 11 have a longitudinal size which is substantially the same as each other but a different transversal development.

[0039] Moreover, in a preferred embodiment, the second folds 11 are realised between the blanks 21 and are alternated with the first folds 10.

[0040] The sheet development of the second folds 11 is greater, since their increased depth is obtained through profiling of folds which have already been drawn.

[0041] In practice, in a preferred embodiment of the procedure the convective surface is realised by a single piece formed from a sheet band, suitably unloaded with parallel blanks or slits with a constant pitch, then folded with drawing to realise the folds which will be in wet contact and drawing and profiling to realise the folds which will be in dry contact.

[0042] In practice the increased depth of the second folds is obtained through profiling of folds which have already been drawn.

[0043] Laboratory tests have been carried out on a radiator realised according to the finding which have demonstrated a substantial increase in thermal yield with respect to radiators of the traditional type, due not only to the increased exchange surface, but also to the greater involvement in terms of contact (particularly wet) between the convective surface and the shells from which the convective surface itself receives the heat which propagates.

[0044] In practice, it has been noted how the radiator with radiant plates having at least one convective surface, the sheet band and the procedure for realising the aforementioned convective surface according to the invention are particularly advantageous because with respect to the traditional realisation of the type with contact only on wet allows the sunken portions 6 which separate the water channels 5 to be involved in the exchange and, therefore, allows a greater exchange surface to be realised.

[0045] With respect to the traditional realisation of the type with contact on dry and wet, on the other hand, allows the convective surface to be extended until the involvement of collectors 3, 4 arranged at the ends of the shells 2 (instead of stopping at the size of the sunken portions 6).

[0046] Moreover, the profiling operation brings an improvement in the quality of the treatment and of the final result, allowing a high structural robustness and an excellent regularity in the moulding and maintenance of the required shapes to be achieved.

[0047] The assembling and spot welding operation thanks to the excellent coupling between the perfectly shaped details and to a high ease of introduction of the electrodes between the channels is improved, contributing to the realisation of high quality products.

[0048] The radiator having at least one convective surface, the sheet band and the procedure for realising the aforementioned convective surface thus conceived, are susceptible to numerous modifications and variants, all covered by the inventive concept; moreover, all of the details can be replaced by technically equivalent elements.

[0049] In practice, the materials used, as well as the sizes, can be whatever according to the requirements and the state of the art.

Claims

1. Radiator with radiant plates (1) of the type comprising one or more shells (2) for containing a fluid, each defining at least one collector for the input (3) and one for the output (4) of said fluid connected with each other by a plurality of channels (5) which are mutually separated by sunken portions (6) of said shells (2), characterised in that said at least one convective surface (7) comprises at least one first portion (8) connected to said channels (5) and/or to said sunken portions (6), and at least one second portion (9) connected to at least one of said input and/or output collectors (3, 4).

2. Radiator (1) according to claim 1, characterised in that said first portion (8) of said convective surface (7) comprises a sheet which defines first and second folds (10, 11) with substantially transversal development, where said first folds (10) have a lower height than said second folds (11).

3. Radiator (1) according to one or more of the previous claims, characterised in that said at least one second portion (9) of said convective surface (7) comprises substantially transversal folds all having substantially the same height.

4. Radiator (1) according to one or more of the previous claims, characterised in that said first portion (8) and said at least one second portion (9) of said convective surface (7) are realised in a single piece.

5. Radiator (1) according to one or more of the previous claims, characterised in that said convective surface (7) comprises a plurality of slits (12) realised between said first portion (8) and said at least one second portion (9).

6. Radiator (1) according to one or more of the previous claims, characterised in that said first portion (8) has inclined sides (13) in correspondence with said slits (12).

7. Radiator (1) according to one or more of the previous claims, characterised in that said convective surface (7) has, at the longitudinal ends, protruding portions (14) for the connection to said shells (2).

8. Sheet band (20) for realising a convective surface (7), characterised in that it comprises a plurality of blanks (21) arranged next to each other and aligned.

9. Sheet band (20) according to claim 8, characterised in that said blanks (21) have a substantially constant pitch.

10. Sheet band (20) according to claim 8 or 9, characterised in that said blanks (21) have a substantially trapezoidal shape.

11. Sheet band (20) according to claim 10, characterised in that inclined sides (22) of said trapezoidal blanks (21) are directed towards the centre of said sheet band (20).

12. Procedure for realising a convective surface to be connected to the shells of a radiator with radiant plates, characterised in that it consists of realising on a sheet band first and second folds aligned with each other, said first folds being realised through a drawing operation of first portions of said band and said second folds being obtained by realising pairs of blanks and then, through a drawing and profiling operation of second portions of said band.

13. Procedure according to claim 12, characterised in that the first and second folds have a longitudinal size which are substantially the same but with a different transversal development.

14. Procedure according to one of claims 12 to 13, characterised in that the second folds are realised between said blanks.

15. Procedure according to one of claims 13 to 14, characterised in that the second folds are alternated with the first folds.

16. Procedure according to one of claims 12 to 15, characterised in that the sheet development of the second folds is greater, since their increased depth is obtained through profiling of folds which have already been drawn.

17. Radiator with radiant plates having at least one convective surface, sheet band and procedure for realising the aforementioned convective surface, all as substantially described and claimed.

Drawing