EP0840070B1 - Air extractor - Google Patents

Air extractor Download PDF

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Publication number
EP0840070B1
EP0840070B1 EP97402631A EP97402631A EP0840070B1 EP 0840070 B1 EP0840070 B1 EP 0840070B1 EP 97402631 A EP97402631 A EP 97402631A EP 97402631 A EP97402631 A EP 97402631A EP 0840070 B1 EP0840070 B1 EP 0840070B1
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EP
European Patent Office
Prior art keywords
fact
extractor according
diameter
extractor
central part
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Legal status (The legal status 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 status listed.)
Expired - Lifetime
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EP97402631A
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German (de)
French (fr)
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EP0840070A1 (en
Inventor
André Amphoux
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Individual
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Individual
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/02—Roof ventilation

Definitions

  • the invention relates to an air extractor for ventilation.
  • the invention aims to propose an extractor of the type question presenting a simpler embodiment and less expensive.
  • the invention relates to an extractor according to the claim 1.
  • the extractor 1, according to one embodiment of the invention, is intended for be fixed on a duct 2.
  • the extractor 1 comprises a flange corresponding to conduit 2 and facilitating the attachment to this conduit.
  • Extractor 1 has a general axis of symmetry 3 which, when the extractor 1 is mounted, is placed vertically or substantially vertically.
  • extractor 1 can occupy any position.
  • axis 3 is an axis of revolution, extractor 1 being of general shape circular around axis 3.
  • the extractor 1 has a lower part 4 and an upper part 5.
  • the two parts 4, 5 are placed opposite but separated from each other by being joined to one another the other by means of spacers such as 6. These spacers 6 extend parallel to axis 3.
  • Parts 4 and 5 define a free space 7, open to the outside, forming a venturi.
  • the free space 7 is in communication with a opening 8 in the lower part 4 at its upper end.
  • This opening 8 is itself in communication with conduit 2.
  • the lower part 4 has a shaped part 9 general frustoconical whose small base, upper, where is finds the opening 8, is turned towards the upper part 5 while the large base 11, lower, is turned opposite the upper part 5.
  • the diameter of the large base is of the order of 1.6 to 2.5 times the diameter d of the small base 10, or opening 8.
  • the angle ⁇ between the large base 11 and the wall inclined 9a of the part 9 is for example between 20 ° and 45 °.
  • the lower part 4 comprises, in addition to a first part such as 9, a second piece 12 which, like the first piece 9, is shaped general frustoconical.
  • the second part 12 is associated with the first part 9 so that their large bases 11, 13 are common or substantially common and that their small bases 10, 14 are opposite and separated from each other.
  • the small base 10 can be overcome, towards the upper part 5, of a lip 10a, shown in the Figures 2 and 3, of substantially circular section, axis 3 and of diameter d identical to that of the small base 10.
  • the height h 1 of the lip 10a -counted parallel to the axis 3- is of the order of 0.01 to 0.02 times the diameter d.
  • the height h 2 -counted along the axis 3-between the free peripheral edge of the lip 10a and the upper part 5 is of the order of 0.45 to 0.8 times the diameter d.
  • the upper part 5 is in the form of a flattened cup.
  • This cup 5 is generally circular in shape.
  • the cup 5 comprises a central part 15, transverse, axially offset from the part remaining annular outer 16.
  • This axial offset is such that the central part 15 is further away from the median plane of the lower part 4 than is the annular outer part 16.
  • the plane P can be the plane placed between the two bases 10, 11.
  • the plane P can be defined by the large bases 11, 13.
  • the outside diameter of the cup 5 is equal to or close to the outside diameter of the lower part 4 defined by the major base (s) 11, 13.
  • the diameter of the central part 15 is equal to or close to the diameter of the opening 8. It is, in the modes shown, between 0.8 and 1.25 times the diameter d of the small base 10.
  • the diameter of the central part 15 is, in the achievement considered, between 0.4 and 0.6 times approximately the outside diameter of the cup 5.
  • the diameter of the central part 15 is of the order of half the outside diameter of the cup 5.
  • the axial offset of the central part 15 by relative to the annular outer part 16 - along the axis 3- is about a tenth of the diameter of the part central 15, and preferably of the order of 0.15 to 0.5 times the diameter d of the small base 10.
  • the transverse central part 15 is flat or substantially flat, as is the outer part ring finger 16.
  • the transverse central part 15 is connected to the annular outer part 16 by a wall of connection 17 of generally frustoconical shape, inclined by in relation to axis 3.
  • This connecting wall 17 is on the side of the central part 15 and its large diameter of the side of the annular outer part 16.
  • the angle of inclination of the connection wall 17 on axis 3 is between 15 ° and 45 °.
  • this angle is of the order of 20 °.
  • the upper part forming a cup 5 comprises in the embodiment shown, an outer edge 18 falling towards the midplane P.
  • the axial length of the falling outer edge 18 is of the order of one third or two thirds of the axial offset of the central part 15 relative to the external part ring finger 16.
  • the angle of inclination of the falling outer edge 18 on axis 3 can be of the same order of magnitude as that of the connection wall 17.
  • Extractor 1 is then of type static.
  • the space 19 allows the housing of the blade or blades 20 of a turbine 21 fixed to the cup 5 while being placed at opposite of the lower part 4.
  • the extractor 1 can then be of the static type or, when the turbine 21 is operating, of dynamic type.
  • the extractor 1 includes such a turbine, it is preferable that it be provided with a cover protection 22.
  • This protective cover 22 is fixed to the cup 5, on the side opposite the lower part 4.
  • Such a cover 22 has a generally conical shape or frustoconical with, in the latter case, a wall upper transverse 23.
  • Such a cover 22 can be fixed to the part outer annular 16 in the vicinity of the falling edge 18.
  • An opening 24 may be provided between the cover 22 and the annular outer part 16 so as to allow the air circulation inside the cover 22.
  • the cover 22 is of generally frustoconical shape, for improve air circulation, and therefore the cooling of the turbine 21, an opening is provided 23a formed in the upper wall 23 of the cover 22.
  • the wall 23 is surmounted by a cap 25, of generally conical shape.
  • the base 25a of the cap 25 is fixed to the wall 23 with a space 26 between them for the evacuation of air from opening 23a.
  • the extractor When the extractor is of dynamic type, it can optionally have a lower part 4 with a part single 9 as shown in Figure 3 or with two pieces such as 9 and 12.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Apparatus For Making Beverages (AREA)
  • Extraction Or Liquid Replacement (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Food-Manufacturing Devices (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

The air extractor comprises lower (4) and upper (5) sections which face one another and are joined together by spacers (6) to provide a gap between them which acts as a Venturi tube in communication with an aperture in the lower section. The upper section of the extractor is generally circular in shape with a recessed centre and an outer diameter more or less the same as that of the lower section. The diameter of the central recess in the upper section of the extractor is more or less the same as that of the aperture in the lower section, or between 0.8 and 1.25 times the diameter of the aperture, and between 0.4 and 0.6 of the outer diameter of the upper section.

Description

L'invention concerne un extracteur d'air destiné à la ventilation.The invention relates to an air extractor for ventilation.

On connaít déjà différentes formes de réalisation d'extracteur d'air pour la ventilation de locaux.We already know different embodiments air extractor for ventilation of premises.

On peut se référer en particulier aux documents FR-A-2.374.591, FR-A-2.438.795, FR-A-2.474.651, FR-A-2.514.469, FR-A-2.518.710, FR-A-2.647.881, FR-A-2.651.563, FR-A-2.658.271, et FR-A-2.709.534.We can refer in particular to documents FR-A-2,374,591, FR-A-2.438.795, FR-A-2.474.651, FR-A-2.514.469, FR-A-2.518.710, FR-A-2.647.881, FR-A-2.651.563, FR-A-2.658.271, and FR-A-2,709,534.

Ces différents documents révèlent un extracteur du type comportant une partie inférieure et une partie supérieure placées en regard mais écartées l'une de l'autre en étant solidarisées l'une à l'autre au moyen d'entretoises, définissant entre elles un espace libre ouvert formant venturi en communication avec une ouverture ménagée dans la partie inférieure.These various documents reveal an extractor of the type having a lower part and an upper part placed opposite but separated from each other by being secured to each other by means of spacers, defining between them an open free space forming a venturi in communication with an opening in the part lower.

On connaít par ailleurs par le document EP-A-641.972 un extracteur conforme au préambule de la revendication 1.We also know from document EP-A-641,972 a extractor according to the preamble of claim 1.

L'invention vise à proposer un extracteur du type en question présentant une forme de réalisation plus simple et moins coûteuse.The invention aims to propose an extractor of the type question presenting a simpler embodiment and less expensive.

A cet effet, l'invention concerne un extracteur selon la revendication 1.To this end, the invention relates to an extractor according to the claim 1.

Des formes de réalisation de l'invention résulteront de la description qui suivra en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue schématique en coupe d'un plan axial vertical d'un extracteur selon l'invention de type statique, selon une première forme de réalisation ;
  • la figure 2 est une vue correspondant à celle de la figure 1 d'une seconde variante de réalisation de l'extracteur statique ;
  • la figure 3 est une vue schématique correspondant à celle de la figure 1 d'une variante de réalisation correspondant à un extracteur pouvant fonctionner de façon statique ou dynamique.
Embodiments of the invention will result from the description which follows with reference to the appended drawings in which:
  • Figure 1 is a schematic sectional view of a vertical axial plane of an extractor according to the invention of static type, according to a first embodiment;
  • Figure 2 is a view corresponding to that of Figure 1 of a second alternative embodiment of the static extractor;
  • Figure 3 is a schematic view corresponding to that of Figure 1 of an alternative embodiment corresponding to an extractor can operate statically or dynamically.

L'extracteur 1, selon une forme de réalisation l'invention, est destiné à être fixé sur un conduit 2.The extractor 1, according to one embodiment of the invention, is intended for be fixed on a duct 2.

Le cas échéant, l'extracteur 1 comporte une collerette correspondant au conduit 2 et facilitant la fixation à ce conduit.Where appropriate, the extractor 1 comprises a flange corresponding to conduit 2 and facilitating the attachment to this conduit.

L'extracteur 1 présente un axe général de symétrie 3 qui, lorsque l'extracteur 1 est monté, est placé verticalement ou sensiblement verticalement.Extractor 1 has a general axis of symmetry 3 which, when the extractor 1 is mounted, is placed vertically or substantially vertically.

C'est par rapport à cette position montée qu'est faite la description, étant entendu qu'avant montage, l'extracteur 1 peut occuper n'importe quelle position.It is in relation to this mounted position that make the description, it being understood that before mounting, extractor 1 can occupy any position.

D'une façon générale, l'axe 3 est un axe de révolution, l'extracteur 1 étant de forme générale circulaire autour de l'axe 3.In general, axis 3 is an axis of revolution, extractor 1 being of general shape circular around axis 3.

L'extracteur 1 comporte une partie inférieure 4 et une partie supérieure 5. The extractor 1 has a lower part 4 and an upper part 5.

Les deux parties 4, 5 sont placées en regard mais écartées l'une de l'autre en étant solidarisées l'une à l'autre au moyen d'entretoises telles que 6. Ces entretoises 6 s'étendent parallèlement à l'axe 3.The two parts 4, 5 are placed opposite but separated from each other by being joined to one another the other by means of spacers such as 6. These spacers 6 extend parallel to axis 3.

Les parties 4 et 5 définissent entre elles un espace libre 7, ouvert vers l'extérieur, formant venturi.Parts 4 and 5 define a free space 7, open to the outside, forming a venturi.

L'espace libre 7 est en communication avec une ouverture 8 ménagée dans la partie inférieure 4 à son extrémité supérieure.The free space 7 is in communication with a opening 8 in the lower part 4 at its upper end.

Cette ouverture 8 est elle-même en communication avec le conduit 2.This opening 8 is itself in communication with conduit 2.

Dans les variantes de réalisation des figures 1 et 3, la partie inférieure 4 comporte une pièce 9 de forme générale tronconique dont la petite base, supérieure, où se trouve l'ouverture 8, est tournée vers la partie supérieure 5 tandis que la grande base 11, inférieure, est tournée vers l'opposé de la partie supérieure 5.In the variant embodiments of FIGS. 1 and 3, the lower part 4 has a shaped part 9 general frustoconical whose small base, upper, where is finds the opening 8, is turned towards the upper part 5 while the large base 11, lower, is turned opposite the upper part 5.

Le diamètre de la grande base il est de l'ordre de 1,6 à 2,5 fois le diamètre d de la petite base 10, ou de l'ouverture 8.The diameter of the large base is of the order of 1.6 to 2.5 times the diameter d of the small base 10, or opening 8.

L'angle α entre la grande base 11 et la paroi inclinée 9a de la pièce 9 est par exemple compris entre 20° et 45°.The angle α between the large base 11 and the wall inclined 9a of the part 9 is for example between 20 ° and 45 °.

Dans le cas de la figure 2, la partie inférieure 4 comporte, outre une première pièce telle que 9, une seconde pièce 12 qui, comme la première pièce 9, est de forme générale tronconique. In the case of Figure 2, the lower part 4 comprises, in addition to a first part such as 9, a second piece 12 which, like the first piece 9, is shaped general frustoconical.

La seconde pièce 12 est associée à la première pièce 9 de manière que leurs grandes bases 11, 13 soient communes ou sensiblement communes et que leurs petites bases 10, 14 soient opposées et écartées l'une de l'autre.The second part 12 is associated with the first part 9 so that their large bases 11, 13 are common or substantially common and that their small bases 10, 14 are opposite and separated from each other.

La petite base 10 peut être surmontée, vers la partie supérieure 5, d'une lèvre 10a, représentée sur les figures 2 et 3, de section sensiblement circulaire, d'axe 3 et de diamètre d identique à celui de la petite base 10.The small base 10 can be overcome, towards the upper part 5, of a lip 10a, shown in the Figures 2 and 3, of substantially circular section, axis 3 and of diameter d identical to that of the small base 10.

La hauteur h1 de la lèvre 10a -comptée parallèlement à l'axe 3- est de l'ordre de 0,01 à 0,02 fois le diamètre d.The height h 1 of the lip 10a -counted parallel to the axis 3- is of the order of 0.01 to 0.02 times the diameter d.

En outre, la hauteur h2 -comptée suivant l'axe 3-entre la bord périphérique libre de la lèvre 10a et la partie supérieure 5 est de l'ordre de 0,45 à 0,8 fois le diamètre d.In addition, the height h 2 -counted along the axis 3-between the free peripheral edge of the lip 10a and the upper part 5 is of the order of 0.45 to 0.8 times the diameter d.

La partie supérieure 5 se présente sous la forme d'une coupelle aplatie.The upper part 5 is in the form of a flattened cup.

Cette coupelle 5 est de forme générale circulaire.This cup 5 is generally circular in shape.

La coupelle 5 comprend une partie centrale 15, transversale, décalée axialement par rapport à la partie restante extérieure annulaire 16.The cup 5 comprises a central part 15, transverse, axially offset from the part remaining annular outer 16.

Ce décalage axial est tel que la partie centrale 15 est plus écartée du plan médian de la partie inférieure 4 que ne l'est la partie extérieure annulaire 16. This axial offset is such that the central part 15 is further away from the median plane of the lower part 4 than is the annular outer part 16.

On entend ici par plan médian de la partie inférieure 4 un plan P, transversal, passant par la partie médiane de la partie inférieure 4.Here we mean by median plane of the part lower 4 a plane P, transverse, passing through the part lower middle 4.

Par exemple, dans le cas d'une partie inférieure 4 ayant la forme de réalisation selon les figures 1 et 3, le plan P peut être le plan placé entre les deux bases 10, 11.For example, in the case of a lower part 4 having the embodiment according to Figures 1 and 3, the plane P can be the plane placed between the two bases 10, 11.

Dans le cas de la variante de réalisation de la figure 2, le plan P peut être défini par les grandes bases 11, 13.In the case of the alternative embodiment of the figure 2, the plane P can be defined by the large bases 11, 13.

Le diamètre extérieur de la coupelle 5 est égal ou voisin du diamètre d extérieur de la partie inférieure 4 définie par la ou les grandes bases 11, 13.The outside diameter of the cup 5 is equal to or close to the outside diameter of the lower part 4 defined by the major base (s) 11, 13.

Le diamètre de la partie centrale 15 est égal ou voisin du diamètre de l'ouverture 8. Il est, dans les modes de réalisation représentés, compris entre 0,8 et 1,25 fois le diamètre d de la petite base 10.The diameter of the central part 15 is equal to or close to the diameter of the opening 8. It is, in the modes shown, between 0.8 and 1.25 times the diameter d of the small base 10.

Le diamètre de la partie centrale 15 est, dans la réalisation considérée, compris entre 0,4 et 0,6 fois environ le diamètre extérieur de la coupelle 5.The diameter of the central part 15 is, in the achievement considered, between 0.4 and 0.6 times approximately the outside diameter of the cup 5.

En particulier, le diamètre de la partie centrale 15 est de l'ordre de la moitié du diamètre extérieur de la coupelle 5.In particular, the diameter of the central part 15 is of the order of half the outside diameter of the cup 5.

Le décalage axial de la partie centrale 15 par rapport à la partie extérieure annulaire 16 -suivant l'axe 3- est de l'ordre du dixième du diamètre de la partie centrale 15, et de préférence, de l'ordre de 0,15 à 0,5 fois le diamètre d de la petite base 10. The axial offset of the central part 15 by relative to the annular outer part 16 - along the axis 3- is about a tenth of the diameter of the part central 15, and preferably of the order of 0.15 to 0.5 times the diameter d of the small base 10.

La partie centrale transversale 15 est plane ou sensiblement plane, de même que la partie extérieure annulaire 16.The transverse central part 15 is flat or substantially flat, as is the outer part ring finger 16.

La partie centrale transversale 15 est raccordée à la partie extérieure annulaire 16 par une paroi de raccordement 17 de forme générale tronconique, inclinée par rapport à l'axe 3.The transverse central part 15 is connected to the annular outer part 16 by a wall of connection 17 of generally frustoconical shape, inclined by in relation to axis 3.

Le petit diamètre de cette paroi de raccordement 17 se trouve du côté de la partie centrale 15 et son grand diamètre du côté de la partie extérieure annulaire 16.The small diameter of this connecting wall 17 is on the side of the central part 15 and its large diameter of the side of the annular outer part 16.

L'angle d'inclinaison de la paroi de raccordement 17 sur l'axe 3 est compris entre 15° et 45°.The angle of inclination of the connection wall 17 on axis 3 is between 15 ° and 45 °.

Dans la réalisation représentée sur les dessins, cet angle est de l'ordre de 20°.In the embodiment shown in the drawings, this angle is of the order of 20 °.

La partie supérieure formant coupelle 5 comporte dans la réalisation représentée, un bord extérieur 18 tombant vers le plan médian P.The upper part forming a cup 5 comprises in the embodiment shown, an outer edge 18 falling towards the midplane P.

La longueur axiale du bord extérieur tombant 18 est de l'ordre du tiers ou des deux tiers du décalage axial de la partie centrale 15 par rapport à la partie extérieure annulaire 16.The axial length of the falling outer edge 18 is of the order of one third or two thirds of the axial offset of the central part 15 relative to the external part ring finger 16.

L'angle d'inclinaison du bord extérieur tombant 18 sur l'axe 3 peut être du même ordre de grandeur que celui de la paroi de raccordement 17.The angle of inclination of the falling outer edge 18 on axis 3 can be of the same order of magnitude as that of the connection wall 17.

Dans les réalisations objets des figures 1 et 2, l'espace 19 ménagé par la partie centrale 15 et la paroi de raccordement 17 est vide. L'extracteur 1 est alors de type statique.In the embodiments of Figures 1 and 2, the space 19 formed by the central part 15 and the wall of connection 17 is empty. Extractor 1 is then of type static.

L'espace 19 permet le logement de la ou des pales 20 d'une turbine 21 fixée à la coupelle 5 en étant placé à l'opposé de la partie inférieure 4.The space 19 allows the housing of the blade or blades 20 of a turbine 21 fixed to the cup 5 while being placed at opposite of the lower part 4.

L'extracteur 1 peut alors être de type statique ou, lorsque la turbine 21 fonctionne, de type dynamique.The extractor 1 can then be of the static type or, when the turbine 21 is operating, of dynamic type.

Lorsque l'extracteur 1 comporte une telle turbine, il est préférable qu'il soit pourvu d'un capot de protection 22.When the extractor 1 includes such a turbine, it is preferable that it be provided with a cover protection 22.

Ce capot de protection 22 est fixé à la coupelle 5, du côté opposé à la partie inférieure 4.This protective cover 22 is fixed to the cup 5, on the side opposite the lower part 4.

Un tel capot 22 présente une forme générale conique ou tronconique avec, dans ce dernier cas, une paroi transversale supérieure 23.Such a cover 22 has a generally conical shape or frustoconical with, in the latter case, a wall upper transverse 23.

Un tel capot 22 peut être fixé à la partie extérieure annulaire 16 au voisinage du bord tombant 18. Une ouverture 24 peut être prévue entre le capot 22 et la partie extérieure annulaire 16 de manière à permettre la circulation de l'air à l'intérieur du capot 22.Such a cover 22 can be fixed to the part outer annular 16 in the vicinity of the falling edge 18. An opening 24 may be provided between the cover 22 and the annular outer part 16 so as to allow the air circulation inside the cover 22.

En outre, dans le mode de réalisation représenté, où le capot 22 est de forme générale tronconique, pour améliorer la circulation de l'air, et donc le refroidissement de la turbine 21, on prévoit une ouverture 23a ménagée dans la paroi supérieure 23 du capot 22. Furthermore, in the embodiment shown, where the cover 22 is of generally frustoconical shape, for improve air circulation, and therefore the cooling of the turbine 21, an opening is provided 23a formed in the upper wall 23 of the cover 22.

Comme représenté à la figure 3, la paroi 23 est surmontée d'un chapeau 25, de forme générale conique. La base 25a du chapeau 25 est fixée à la paroi 23 avec un espace 26 entre eux pour l'évacuation de l'air provenant de l'ouverture 23a.As shown in Figure 3, the wall 23 is surmounted by a cap 25, of generally conical shape. The base 25a of the cap 25 is fixed to the wall 23 with a space 26 between them for the evacuation of air from opening 23a.

Lorsque l'extracteur est de type dynamique, il peut comporter, au choix, une partie inférieure 4 avec une pièce unique 9 telle que cela est représenté sur la figure 3 ou avec deux pièces telles que 9 et 12.When the extractor is of dynamic type, it can optionally have a lower part 4 with a part single 9 as shown in Figure 3 or with two pieces such as 9 and 12.

Claims (21)

  1. An extractor comprising a bottom part (4) and a top part (5), placed opposite and separated from each other whilst being fixed to each other by means of struts (6), defining between them an open free space (7) forming a venturi, in communication with an opening (8) provided in the bottom part (4), characterised by the fact that the face of the top part (5) opposite the bottom part (4) is in the form of a dish with a circular shape overall and with an outside diameter equal to or close to the outside diameter of the bottom part (4), comprising an annular external part and a central part (15) offset axially towards the top with respect to the annular external part and with a diameter equal to or close to the diameter of the opening (8) formed in the bottom part, the central part and the annular external part being flat or substantially flat.
  2. An extractor according to Claim 1, characterised by the fact that the diameter of the central part (15) is between 0.8 and 1.25 times the diameter (d) of the opening (8).
  3. An extractor according to either one of Claims 1 or 2, characterised by the fact that the diameter of the central part (15) is between approximately 0.4 and 0.6 times the outside diameter of the dish (5).
  4. An extractor according to any one of Claims 1 to 3, characterised by the fact that the diameter of the central part (15) is around one half the outside diameter of the dish (5).
  5. An extractor according to any one of Claims 1 to 4, characterised by the fact that the axial offset between the central part (15) with respect to the annular external part (16) is around one tenth of the diameter of the central part (15).
  6. An extractor according to any one of Claims 1 to 5, characterised by the fact that the axial offset of the central part (15) with respect to the annular external part (16) is between 0.15 and 0.5 times the diameter (d) of the opening (8).
  7. An extractor according to any one of Claims 1 to 6, characterised by the fact that the central part (15) is connected to the annular part (16) by a connecting wall (17) inclined in a frustoconical fashion to the axis (3) of the extractor.
  8. An extractor according to Claim 7, characterised by the fact that the angle of inclination of the connecting wall (17) to the axis (3) is between 15° and 45°, in particular around 20°.
  9. An extractor according to any one of Claims 1 to 8, characterised by the fact that the dish (5) has an external edge (18) falling towards the bottom.
  10. An extractor according to Claim 9, characterised by the fact that the axial length of the falling external edge (18) is around two thirds of the axial offset of the central part (15) with respect to the annular part (16).
  11. An extractor according to any one of Claims 1 to 10, characterised by the fact that the bottom part (4) comprises a frustoconically shaped piece (9) whose base (10) is turned towards the top part (5) in the form of a dish and whose large base (10) is directed in the opposite direction.
  12. An extractor according to Claim 11, characterised by the fact that the diameter of the large base (11) is between 1.6 and 2.5 times the diameter (d) of the small base (10).
  13. An extractor according to Claim 11 or 12, characterised by the fact that a lip (10a), with a substantially circular cross-section and with the same axis (3) and diameter (d) as the opening (8), is fixed to the bottom part (4), at its small base (10), and directed towards the top part (5).
  14. An extractor according to one of Claims 11 to 13, characterised by the fact that the bottom part (4) also comprises a second piece (12) of frustoconical shape overall, associated with the first piece (9), the large bases (11, 13) being common or substantially common and the small bases (10, 14) being opposed.
  15. An extractor according to any one of Claims 7 to 14, characterised by the fact that the space (19) formed by the axially offset central part (15) and the connecting wall (17) is empty, the extractor (1) being of the static type.
  16. An extractor according to any one of Claims 7 to 14, characterised by the fact that the hollow space (19) formed by the axially offset central part (15) and the connecting wall (17) allows the housing of the blade or blades (20) of a turbine (21), the extractor (1) being able to be of the static or dynamic type.
  17. An extractor according to Claim 16, characterised by the fact that the turbine (21) is fixed to the top part forming a dish (5) opposite to the bottom part (4)
  18. An extractor according to either one of Claims 16 and 17, characterised by the fact that it also comprises a cover (22) protecting the turbine (21), fixed to the dish (5).
  19. An extractor according to Claim 18, characterised by the fact that the cover (22) has a conical shape overall.
  20. An extractor according to Claim 18, characterised by the fact that the cover (22) has a frustoconical shape overal with a top transverse wall (23).
  21. An extractor according to Claim 20, characterised by the fact that the top wall (23) comprises an opening (23a) and is surmounted, with a space (26), by a conical cowl (25).
EP97402631A 1996-11-05 1997-11-04 Air extractor Expired - Lifetime EP0840070B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9613459 1996-11-05
FR9613459A FR2755505B1 (en) 1996-11-05 1996-11-05 AIR EXTRACTOR FOR VENTILATION

Publications (2)

Publication Number Publication Date
EP0840070A1 EP0840070A1 (en) 1998-05-06
EP0840070B1 true EP0840070B1 (en) 2003-03-05

Family

ID=9497330

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97402631A Expired - Lifetime EP0840070B1 (en) 1996-11-05 1997-11-04 Air extractor

Country Status (7)

Country Link
EP (1) EP0840070B1 (en)
AT (1) ATE233882T1 (en)
DE (1) DE69719448T2 (en)
ES (1) ES2194169T3 (en)
FR (1) FR2755505B1 (en)
HU (1) HU221570B (en)
PL (1) PL184815B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2782781B1 (en) 1998-09-02 2000-09-29 Andre Amphoux SAFETY DEVICE FOR GAS EVACUATION SYSTEMS
FR2842586B1 (en) * 2002-07-17 2005-05-20 Invent Or DEVICE FOR EXTRACTING GAS
FR2869976B1 (en) * 2004-05-06 2006-08-18 Andre Amphoux STATIC-TYPE AIR EXTRACTOR COMPRISING A SUPERIOR PART WHOSE EXTERNAL FACE IS INCLINED
CN104121614B (en) * 2014-07-25 2016-12-28 宁波方太厨具有限公司 A kind of rectification acceleration dish structure used for range hood

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2262777A1 (en) * 1974-02-28 1975-09-26 Junqua Yves Static chimney ventilator - housing with concave sides and gutter above, generating depression by wind deflection
FR2374591A1 (en) 1976-12-14 1978-07-13 Amphoux Andre Vacuum inducer for chimney stack - has baffle plate and venturi induced by cross-draught over cones separated by fins
FR2435672A1 (en) * 1978-09-06 1980-04-04 Grp Interet Eco Maison Natural draught roof ventilator - has cone shaped skirt on end of vertical external duct with flat topped S=shaped cap
FR2438795B2 (en) 1978-10-13 1986-04-04 Amphoux Andre STATICO-DYNAMIC GAS FLUID VACUUM
FR2474651B1 (en) 1980-01-25 1986-04-04 Amphoux Andre RELEASE INSTALLATION IN THE AMBIENT ATMOSPHERE OF A HIGH SPEED PRESSURE GAS FLUID
FR2514469B1 (en) 1981-10-13 1986-04-04 Amphoux Andre STATIC, DYNAMIC AND MECHANICAL GAS FLUID VACUUM DEVICE
FR2518710B1 (en) 1981-12-18 1988-09-23 Amphoux Andre IMPROVED STATIC GAS FLUID VACUUM
FR2647881B1 (en) * 1989-05-30 1994-07-29 Amphoux Andre MIXED VENTILATION DEVICE FOR A HOUSE
FR2651563B1 (en) 1989-09-06 1991-12-27 Amphoux Andre GAS SUCTION DEVICE.
FR2658271B1 (en) 1990-02-09 1995-01-06 Andre Amphoux DEVICE FOR SUCTION AND RELEASE OF GASES OR SMOKE AND INSTALLATION COMPRISING A PLURALITY OF SUCH DEVICES.
FR2709534B1 (en) 1993-09-03 1996-02-09 Andre Amphoux Static / dynamic device for evacuating gaseous fluid.

Also Published As

Publication number Publication date
ATE233882T1 (en) 2003-03-15
EP0840070A1 (en) 1998-05-06
PL323000A1 (en) 1998-05-11
DE69719448D1 (en) 2003-04-10
ES2194169T3 (en) 2003-11-16
HUP9701790A3 (en) 1999-09-28
FR2755505A1 (en) 1998-05-07
PL184815B1 (en) 2002-12-31
DE69719448T2 (en) 2004-01-15
HUP9701790A2 (en) 1998-07-28
HU221570B (en) 2002-11-28
FR2755505B1 (en) 1999-01-15
HU9701790D0 (en) 1997-12-29

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