EP1530007A1

EP1530007A1 - air chamber with former for roof-mounted extractor or impeller units

Info

Publication number: EP1530007A1
Application number: EP03380256A
Authority: EP
Inventors: Joan Batlle Collet
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-11-04
Filing date: 2003-11-04
Publication date: 2005-05-11

Abstract

Air chamber (3) with former (4) for roof-mounted extractor or impeller units which is formed on its lower part by the roof (1), on the upper part by the peripheral skirt (2) of the extractor unit and at the sides by a former (4) which connects the body of the extractor or impeller with the interior of the building through a perforation implemented in the roof (1). The constitution of said air chamber (3) by means of the former (4) avoids the formation of turbulence, with the ensuing drop in pressure and reduction in the efficiency of the extractor or impeller, it also prevents the penetration of air and water to the interior of the building and therefore it also obviates the consequent sealing of the skirt (2) to the roof, having a finish which does not require finishing. The geometry of the body of the extractor and of the former (4) are identical, as well as the geometry of the perforation implemented in the roof (1) and that of the former (4), which are also the same.

Description

OBJECT OF THE INVENTION.

The object of the present invention is an air chamber with former for roof-mounted extractor or impeller units. This chamber is produced between the roof and the skirt of the extractor or impeller unit on placing a former connected to the body of the extraction unit and which is introduced inside the building or roof from where the air is extracted.
The present invention is characterized by the act of creating an air chamber by mounting a former or prismatic body on the body of the extractor or impeller gear, an improvement being produced in the continuity of the flow of channelled air, resulting in an increase in the efficiency of the unit.
Also with the former or prismatic body connected to the body of the extractor or impeller a perfect interior finish of the roof is achieved, provided that the cut in the roof is correct and the former projects enough for the actual shadow to hide the union.
Thus, the present invention falls within the limits of the extractor or impeller units mounted on roofs and their accessories for emplacement.

BACKGROUND OF THE INVENTION.

The different extractor or impeller units mounted on roofs given their constructive characteristics, as well as those of the roofs, are mounted so that no air chamber is formed, regardless of the operating system, being this a Venturi system and physical convection, a Futurvent spiral system with spherical base, a double channel Futurvent with cylindrical base, mixed systems with motor, etc.
Only in the cases in which there are false ceilings, since it is necessary to conduct the air into the interior, is something similar to an air chamber produced, but in these cases the presence of an air chamber becomes unnecessary.
To be able to mount the different types of aforementioned units on roofs, square perforations are generally implemented in the roofs so that on positioning the bases of the extractors or impellers which have the form of fairings, an area is created which generates turbulence during extraction, causing substantial loss of pressure before the air enters the building through the inner union. The greater the external wind speed, the greater is this loss of pressure, which produces a great loss in the penetration of the air from the interior, that is, the turbulence creates a plug effect which impedes the correct extraction of the interior air.
Furthermore the perforations implemented on the roof up to now allow the entrance of air or water to the interior of the building, making it necessary to employ foams or means for sealing around the unit.
Therefore the objective of the present invention is that of overcoming the previous drawbacks, developing for this a system of air extraction in which by using a former or cylindrical body a chamber is created between the skirt of the units and the roof of the building. This chamber prevents the formation of currents or eddies with the ensuing loss of pressure and reduction of the efficiency of the extractor or impeller, as well as preventing the suction and penetration of rainwater into the interior of the building, the sealing of the skirt with the roof of the building not being necessary.
Although the solution adopted may seem evident, this is not the case, since with a single element, in this case a former or cylindrical element, the benefits obtained are multiple, the detection of the problem of loss of load not proving evident nor the solution by means of the creation of a chamber established by means of a former or cylindrical body.

DESCRIPTION OF THE INVENTION.

The air chamber with former for roof-mounted extractors or impellers object of the invention, basically consists in mounting in a connected manner on the body of the extractor, a former or prismatic body of geometric characteristics similar to those of the body of the extractor, possibly being triangular, square, or hexagonal in shape, it being important that the former adapts as much as possible to the body of the ventilation unit.
Said former must have a length such that it penetrates sufficiently through the roof into the interior of the building in an adequate manner. The perforation through which the former penetrates to the interior of the building will be of the same geometric shape as that of the former, a circular form being preferable to make the implementation easier.
The identical geometric shape of the perforation made in the roof and that of the former implies a number of benefits like obviating the finishing and adjustment of trim, since on many occasions it is necessary to employ L-shaped, U-shaped and box-shaped trim, which cannot be fitted directly from the roof and require a scaffold or platform to be erected inside the building to adapt or position them.
After mounting the former connected to the body of the extractor or impeller, the air chamber is defined by the skirt or base of the extractor unit, which usually has shapes like an upturned funnel with the open part resting on the flat of the roof. Another part which delimits the chamber is the roof itself under the skirt of the extractor or impeller, while the third and last part which defines the chamber is the former itself which, joined to the body of the extractor or impeller is prolonged and introduced sufficiently inside the building.
Thanks to said chamber established by the former, various effects are achieved:

The formation of turbulence is obviated, with the ensuing loss of pressure and decrease in the efficiency of the extractor or impeller.
The entrance is prevented of water and air from the exterior into the interior of the building.
By implementing in the roof a cut of geometric characteristics similar to those of the former, the need is avoided the seal around the unit with the subsequent saving in time and costs.

DESCRIPTION OF THE DRAWINGS.

To complete the description which will be given below and with the object of assisting in a better understanding of the characteristics thereof, the present descriptive specification is accompanied with a set of drawings in the figures of which, by way of illustration and not restrictively, the most significant details in the invention are represented.
Figure 1, shows a representation of the air chamber created with a former object of the invention.
Figure 2, shows a representation of how the installation of extractor or impeller units has been carried out up to now and the consequences arising therefrom.

PREFERRED EMBODIMENT OF THE INVENTION.

In the light of the figures mentioned, a preferred mode of embodiment of the invention is disclosed hereunder.
In figure 1, it can be observed that on the roof (1), a perforation (5) has been carried out, of geometry similar to that of the former (4), being preferably cylindrical, although any other geometry is possible.
Over the body (7) of the extractor or impeller unit (6) on its end extremity a former (4) is connected, which has the same geometry or shape as that of the body (7). Thanks to said connection a chamber (3) is formed, which is delimited on the lower part by the roof (1) itself, on the upper part by the skirt (2) of the extractor or impeller unit (6), and laterally by the former (4) itself.
In figure 2, the benefits steming from the constitution of the air chamber with a former are observed, since in said figure as there is no space whatsoever under the skirt (2) of the extractor or impeller unit (6), regions of air turbulence (9) or currents are formed which cause a sharp drop in the pressure before entering the interior of the building through the union, said turbulence being greater the greater the external wind speed, preventing the extraction of the air from the interior of the building, by acting as a plug whereby a significant reduction takes place in the efficiency of the extractor or impeller.
Moreover, it can be observed how the perforation (8) through which the air on the interior of the building is extracted is square, which requires the fitting of a quantity of L-shaped, U-shaped or box-shaped trim (10), which cannot be adjusted from the roof, requiring the erection of scaffolds or a platform. Furthermore, to prevent the entrance of air and water to the interior of the building it is necessary to employ sealing arrangements with foams or the like between the skirt of the extractor or impeller and the roof, which deteriorate easily.
The essential nature of this invention is not altered by variations in materials, form, size and arrangement of the component elements, described in a non-restrictive manner, sufficient for the reproduction thereof by an expert.

Claims

Air chamber with former for roof-mounted extractor or impeller units formed on its lower part by the roof itself, on the top by the skirt of the extractor or impeller unit and at the sides by a former mounted between the body of the extractor or impeller and prolonged at the bottom to pass through the roof via a perforation of identical geometry to that of the former, the body of the extractor or impeller and the former having identical geometry such that it allows the connection between both parts.