EP1191299A1

EP1191299A1 - Heating radiator and method for producing the same

Info

Publication number: EP1191299A1
Application number: EP00830631A
Authority: EP
Inventors: Danilo Rossetti; Massimo Rossetti
Original assignee: Cogefin Srl
Current assignee: Cogefin Srl
Priority date: 2000-09-21
Filing date: 2000-09-21
Publication date: 2002-03-27

Abstract

A process is provided to produce an heating radiator including the phases to obtain of at least one line of first holes (2a) on each one of two tubular elements (2) allotted to embody the end manifolds, to insert the ends of pipes (3) destined to embody the radiating elements in the first holes (2a), and to join by welding the ends of the radiating elements (3) to the two end manifolds (2).

Then two pipe rows facing each other (4) are applied as outer radiating elements. It is also provided for an heating radiator including two tubular elements (2) embodying the end manifolds, several pipes (3) embodying a central set of radiating elements and having their ends inserted into a line of first holes (2a) obtained in the end manifolds (2) and several pipes (4) embodying the radiator outer radiating elements.

Description

As it is known, the heating radiators include several pipes, embodying the radiating elements, positioned parallel to each other with a usually vertical orientation and connected to the ends through suitable hydraulic connecting ducts.
In the generally known technique any radiator is divided into modules each one including two heads or end manifolds and a number of pipes, usually changing from three to six, connected at the ends to the manifolds so to make a row of transversal pipes in the direction of the radiator depth.
The end manifolds, placed side by side and connected with each other, lead to the building of more pipes sets, it is to say so many sets as the pipes of each module, positioned on planes parallel to the radiator front surface.
The known technique to embody the radiators of the above summarily described type provides first of all for the building by moulding of half-shells destined to make any manifold once coupled. Each couple of half-shells, placed in contact position, is irremovably joined by traditional or laser welding. In case the welding is the traditional one the article is then to be cleaned by brushing. After the insertion into the two manifolds of each module the ends of the relative pipes, these last ones and the manifolds themselves are welded. The radiator building is then completed joining the several manifolds to each other by side welding or using threaded tubular connection elements, conventionally named nipples.
The process for the embodiment of a radiator according to the known technique, described above in its essential features, has many limits and disadvantages.
In fact, first of all, it requires expensive equipments for the welding of the several components to each other, besides the additional operations. In particular is remarkable the cost of the laser welding equipment. This last technique is also scarcely reliable because it requires a perfect adherence between the parts to be welded which, practically, hardly occurs in the application on the pipes.
Moreover the process for the embodiment of a radiator of the known type consists of many and difficult embodiment phases, in particular many welding, involving remarkable manpower costs.
It is finally to notice that the structure of the manifolds made by two half-shells welded to each other produces a certain dimension in the direction of the radiator transversal depth limiting practically the number of the pipes of any module and then the number of the pipes parallel sets corresponding to them.
In this situation the technical task, base of the present invention, is to plan an heating radiator and its embodiment process to substantially avoid the mentioned disadvantages.
In the field of said technical task is the important aim of the invention to plan an heating radiator and its embodiment process requiring equipments with extremely lower cost as to the costs of the equipments used in the known technique.
Another important aim of the invention is to plan a radiator and an embodiment process allowing to consistently reduce the manpower costs and then control the overall production costs.
A further aim is to plan an heating radiator with limited dimensions as to the known technique in the transversal direction of its depth, being the same the number of pipes used in this direction.
The technical task specified and the stated aims are substantially reached by an embodiment process of an heating radiator characterized in that it included the embodiment phases described in the claim 1.
The provided technical task and the stated aims are also substantially reached by an heating radiator characterized in that it includes the features described in the claim 4.
It is now reported as a not limitative example, the description of two preferred but not exclusive embodiment forms of an heating radiator according to the inventions shown in said drawings, where:

figure 1 shows a front elevation view of the first embodiment form of a radiator according to the invention;
figure 2 shows a section according to the plane II-II of figure 1;
figure 3 shows a top view of the radiator of figure 1;
figure 4 shows a front elevation view of a second embodiment form of a radiator according to the invention;
figure 5 shows a section according to the plane IV-IV of figure 4; and
figure 6 shows a plan view of the radiator of figure 4.

With reference to the mentioned figures, the heating radiator according to the invention is on the whole indicated with n. 1.
It includes two tubular elements embodying the radiator lower and upper end manifolds.
In a first embodiment form shown in figures 1, 2 and 3 the tubular elements 2 show a circular section and on one generatrix of them is obtained a line of first holes 2a longitudinally aligned and fit to house the ends of several pipes 3 forming the central set of heating elements.
The ends of the pipes 3 are irremovably connected through welding to the manifolds 2 so that these last ones are perpendicular to the pipes 3 themselves, that are parallel with each other.
In a second embodiment form, shown in figures 4, 5, and 6, the tubular elements 2 show, in transverse section, a substantially oval shape, lengthened in the direction of the radiator depth. With this shape it is possible to obtain two lines of first holes 2a longitudinally aligned along two parallel generatrices so to house and connect the ends of two pipes 3 sets positioned on parallel planes corresponding to said generatrices. In this second embodiment form there are then two central sets of radiating elements.
Both in the first and the second above described embodiment forms the radiators have two sets of pipes 4 embodying outer radiating elements parallely aligned to the only central set or the two central sets of radiating elements.
More precisely on each of the two manifolds 2 are obtained two lines of second holes 2b aligned along two side generatrices of the manifolds themselves, positioned practically at 90° as to the generatrix on which the first holes 2a are aligned.
Each outer pipe 4 has near its end parts, irremovably connected through welding to the end manifolds 2, two side holes 4a aligned on the same generatrix and placed in connection with two second holes 2b of the same manifolds.
The outer pipes 4 are finally sealed in their end openings 4b by suitable caps closing elements 5.
The invention embody a new process being as well integral part of the present patent.
In this new process it is provided, first of all, a phase of a line of making first holes 2a aligned longitudinally along a generatrix of each one of two tubular elements 2 destined to embody the radiator end manifolds.
If these last ones have in transversal section a shape advantageously lengthen to oval, it is possible to obtain two lines of first holes 2a positioned on two generatrices parallel to each other.
Then it is performed the phase of the insertion into the first holes 2a of the manifolds 2 of the pipes ends 3 so to make one or two or more central sets of radiating elements parallel to each other and placed perpendicularly to the manifolds 2 themselves.
It follows then a phase of joining through welding, advantageously made using the traditional braze welding, of the pipes ends 3 to the manifolds 2.
At the end of the building of the radiator central frame it is obtained on each one of the two manifolds 2 two lines of second holes 2b aligned on opposite side generatrices, it is to say positioned at 90° as to the generatrix on which the first holes 2a are aligned.
Even on each pipe 4 of a further pipe set, destined to be outer radiating elements aligned parallel to the radiating elements central set or sets, there are made two side holes 4a near the end parts and on the same generatrix of the pipe 4.
At this point the shutting of the pipes openings 4b is performed by the closing elements 5 which are welded to the pipes themselves.
The end parts of the pipes 4 are joined by welding, advantageously made by electric induction, to the end manifolds 2 so to put in connection the second holes 2b of these last ones with the side holes 4a of the pipe 4 themselves.
The invention achieves important advantages.
In fact, each radiator is obtained by the union, the radiating elements being equal, with a lower number of components as to the known technique since the manifolds of the whole radiator are simply formed by only two tubular elements instead of several heads welded with each other or connected through screws, each of them by its turn requires the welding of two half-shells.
The radiator components connecting operations are then a lower number and then is more curbed the cost for the manpower necessary for the embodiment of the radiator.
Even the costs of the equipments to be used in the radiator assembly process are remarkably curbed as to the known technique since there are no traditional or laser welding, but simply braze weldings and induction weldings.
Finally the radiator according to the invention, being the number of radiating elements equal, has a smaller volume in the transversal direction thanks to the particular shape of the end manifolds.
Naturally it is possible to make many changes and modifications both to the process and the radiator according to the present invention without going out of its protection field.
In particular the pipes and manifolds drilling sequence can be changed since it proves to be not substantial for the aims of the present invention.
Moreover the pipes and manifolds sections can take any other shape not shown in the drawings.
In particular the double central set of radiating elements can be applied also to radiators with round or elliptical section manifolds.

Claims

A process to produce an heating radiator characterised in that it includes the phases of:

making of at least one line of first holes (2a) longitudinally aligned along a generatrix of each one of the two tubular elements (2) destined to embody the end manifolds, insertion of the ends of the pipes (3) destined to embody the radiating elements in said line of first holes (2a) of each manifold (2), so to make at least one central set of radiating elements aligned parallel to each other and positioned perpendicularly to the two end manifolds,

joining by welding of the ends of said radiating elements central set (3) to the two end manifolds (2),

making on each end manifold (2) of at least one line of second holes (2b) aligned on the side generatrix of the same manifolds,

making of two side holes (4a) positioned near the end parts and aligned on the same generatrix of each pipe of at least one further set of pipes (4) destined to embody the outer radiating elements aligned parallel to said radiating elements central set (3),

shutting by welding with closing elements (5) of the end openings (4b) of said outer radiating elements,

and joining by welding of the end parts of said outer radiating elements (4) to said end manifolds (2) in order to put in connection the second holes (2b) of these last ones positioned on said side generatrix with the side holes (4a) of the outer radiating elements themselves.
A process according to claim 1, characterized in that said joining by welding of the ends of said radiating elements central set (3) to the end manifolds (2) is obtained by braze welding.
A process according to claim 1, characterized in that said joining by welding of the outer radiating elements to the linear manifolds is obtained through electric induction.
An heating radiator characterized in that it includes: two tubular elements (2) embodying the end manifolds of the heating radiator, having each one at least one line of first holes (2a) longitudinally aligned along a generatrix,

a number of several pipes (3) embodying at least one central set of radiating elements having their ends inserted and irremovably connected in said line of first holes (2a) of the end manifolds (2) so to be aligned parallel to each other and positioned perpendicularly to the two manifolds,

at least one second set of pipes (4) embodying the outer radiating elements aligned parallel to said central set of radiating elements (3) and having each one near their own end parts irremovably connected to said end manifolds (2) two side holes (4a) corresponding with respective second holes (2b) obtained along a side generatrix of each one of the manifolds themselves,

and closing elements of the end openings (4b) of said second pipes set (4).
A radiator according to one or more of the preceding claims characterized in that said two tubular elements (2) show in transversal section a substantially oval shape able to contain at least two lines of first holes (2a) aligned along two parallel generatrices and fit to house the ends of two central sets of radiating elements (3) positioned on parallel planes corresponding to said two generatrices.