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(11) | EP 2 221 441 A1 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Device for connecting two aluminium profiles for the realization of composite bars for the construction of casements (windows, doors and balconies) with low thermal transmittance |
| (57) The device represented in fig. 1 (form A9) allow to get, to parity of dimensions,
inferior values of thermal transmittance to the present analogous devices, to the
actual state of the technique, on the market, for the realization of thermal break
profiles, overcoming, without increase of costs, the followings disadvantages. 1° disadvantage: Section of elevated dimension. 2° disadvantage: Reduction of the mechanical resistance of the outlined composed. 3° disadvantage: Difficulty to reach the parameters of transmittance required by the European normative. The found proposes to resolve such problems through the creation of a room of ventilation that allows to reduce the impact of the external cold air with the internal aluminium section. |
[0001] The casements for windows and doors must respond to numerous functional requisites and of thermal isolation as also dictated by norms EEC (EN12412-2:2003).
[0002] The casements realized with outlined of aluminium they acquit very well to the requisite of duration, finish, facility of realization and costs but they are for the more lacking respect to the thermal isolation, being the aluminium among the best thermal conductors.
[0003] The problem is well known and you have seen the proposition to the market of a lot of solutions but anybody in degree to satisfy to the best thermal isolation conjugated to the structural stability, to the facility of construction and assemblage and to the inexpensiveness of the solution, a purpose of the found present is then that to furnish a method and the means to realize an outlined composite for aluminium casements; further purpose of the found present is to furnish an outlined in which the profiles external and inside of the casement is completely separate through mediate insulating profile; further purpose of the found present is to realize a dynamic isolation that integrates that static; further purpose of the found present is to furnish an outlined of joining of the elements structural inside and outside of the fixture, able to make to circulate the air through natural convective motions; further purpose of the found present is to furnish an outlined insulating intermediary characterized by a perforation able to realize the correct circulation of the air avoiding phenomena of it condenses that they reduce enormously the thermal isolation. These and other purposes are realized by the following found as following described and represented in the fig. 1 in which the outlined for casements according to the found present is represented in section.
Description
[0004] The outlined to thermal cut for casement is decomposable, to the goals of the description, in a part "warm" that it is that revolt inside the building, in a part "cold" and therefore external to the building and in the insulating part; the insulating profile according to the found present is characterized by the presence of a series of openings on both the walls of the outlined that, in the preferred form of realization, they are constituted by rectangular openings with joined edges being nevertheless the form, the surface, the number and the position definable otherwise to get the same consistent technical effect in the creation of a room of ventilation that exploiting the difference of temperature between warm part and cold part of the outlined one creates a circulation of air that constitutes a dynamic barrier to the transmission of the warm one and the cold in perpendicular direction to the outlined ones or from the outside of the building toward the inside.
[0005] The openings of ventilation on the outlined insulating are characterized by the preferential position toward the warm profile.
[0006] The natural ventilation fireplace effect prevents the formation of condenses on the cold walls of the outlined in aluminium, very subject to such phenomenon because of the elevated thermal conductibility of the aluminium, the eventuality of the formation of condenses makes the casements more thermal conductive and it frustrates in good part the interposition of outlined insulators according to the known technique.
1. Section for metallic casements characterized by a best thermal isolation
2. Section as from claim 1 in which an insulating septa is mediate among the element
"warm" or that he comes to put inside the building and the element "cold" place to
the outside of the building in which the section insulating is formed from the known
insulating materials and it assumes forms in section whose preferred but not limitative
form of realization is characterized by two parallel surfaces
3. Section as from claim 1 and 2 in which the insulating septa is characterized by a series of perforations on both the walls so that to allow the passage of the air
4. Section as from claims from 1 to 3 in which the perforations on the insulating walls
are constituted in the preferred form of realization by openings to rectangular form
and rounded off edges and in which dimension number and form can be made to vary without
going out of the effect technical product according to the present
5. Section as from claims from 1 to 4 in which the openings are preferably practiced
in the nearest part to the outlined one "warm"
6. Section as from claim from 1 to 5 in which the thermal isolation is improved in dynamic
way because of the convective motions assumed by the air to the inside because of
the difference of temperature between warm wall and cold wall
7. Section as from claims from 1 to 6 in which the circulation of the air to the inside
eliminates it condenses her/it on the cold walls, very sensitive phenomenon because
of the elevated thermal conductibility of the aluminum
8. Section as from claims from 1 to 7 in which the elimination of the condenses it reduces
the transmissibility of the heat through the casement and it reduces the causes of
I degrade some material sensitively increasing the life of the same one
9. Section as from claim from 1 to 8 in which the improved effect of isolation allows
the reduction of the sections of the outlined in aluminum with notable economic benefit
of production and the employment of different materials from the PVC with smaller
pollution in the operations of recovery of the waste casements
10. Section as from claims from 1 to 9 as substantially described, represented in the
sketches and claimed.