EP2578958B1 - Volet - Google Patents

Volet Download PDF

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Publication number
EP2578958B1
EP2578958B1 EP12180075.9A EP12180075A EP2578958B1 EP 2578958 B1 EP2578958 B1 EP 2578958B1 EP 12180075 A EP12180075 A EP 12180075A EP 2578958 B1 EP2578958 B1 EP 2578958B1
Authority
EP
European Patent Office
Prior art keywords
louvre
directed part
blade
air flow
outlet opening
Prior art date
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.)
Active
Application number
EP12180075.9A
Other languages
German (de)
English (en)
Other versions
EP2578958A1 (fr
Inventor
Patrick Marc Perquy
Frederik Ronny Willy Losfeld
Lieven André Eric Depraetere
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renson Sunprotection Projects NV
Original Assignee
Renson Sunprotection Projects NV
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Publication date
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Publication of EP2578958A1 publication Critical patent/EP2578958A1/fr
Application granted granted Critical
Publication of EP2578958B1 publication Critical patent/EP2578958B1/fr
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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
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/082—Grilles, registers or guards
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/02—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
    • E06B7/08—Louvre doors, windows or grilles
    • E06B7/082—Louvre doors, windows or grilles with rigid or slidable lamellae

Definitions

  • the present invention relates to a louvre, comprising at least two substantially horizontal, spaced-apart blades which are arranged parallel to one another and which delimit an air flow duct for air to flow through from an inlet opening to an outlet opening, in which each blade comprises an upwardly directed part adjacent to the inlet opening and comprises a substantially flat or downwardly directed part between this upwardly directed part and the outlet opening.
  • Such louvres are, for example, known as wall ventilators or as window ventilators or louvre walls. Similar louvres are e.g. described in GB 2 328 013 A , US 4,958,555 A , US 3,771,430 A , US 2008/0009233 and WO 2009/044847 .
  • a significant problem associated with louvres which are placed between a technical installation and the open air as a partition or as grille at the end of ventilation tubes of a ventilation device, etc. is the fact that, on the one hand, they are provided as protection against the environment and therefore also have to be watertight, but, on the other hand, they have to provide sufficient ventilation of this technical installation or air flow through the ventilation tubes and therefore have to guarantee a sufficiently large ventilation capacity.
  • the blades according to the preamble of the first claim it is, e.g. as illustrated in figure 14 of GB 2 328 013 A , in US 4,958,555 A and in figure 2 of US 3,771,430 A , already known to provide the blades of such a louvre with an upwardly directed part adjacent to the inlet opening as a barrier against rain which impinges on the louvre and with a downwardly directed part between this upwardly directed part and the outlet opening in order to drain off rain which the upwardly directed part has not been able to block but which has impinged on the downwardly directed part on account of the force of gravity, via said downwardly directed part into, for example, a channel at the end of the blade.
  • a second upwardly directed part is then provided between said downwardly directed part and the outlet opening, e.g. as illustrated in figure 16 of GB 2 328 013 A , as without this forced change in direction, it has been found to be very difficult to block drops which are entrained by the inflowing air. It is therefore important that the upwardly directed parts provide a sufficiently high barrier over which the water has to be forced. In this way, it is possible to guarantee both a high ventilation capacity and a high watertightness.
  • FIG 7 of US 3,771,430 A and in US 2008/0009233 A louvres with similar blades are illustrated, forming a barrier against rain, in which the blades are however installed substantially vertically.
  • a louvre comprising at least two substantially horizontal, spaced-apart blades which are arranged parallel to one another and which delimit an air flow duct for air to flow through from an inlet opening to an outlet opening, in which each blade comprises an upwardly directed part adjacent to the inlet opening and comprises a substantially flat or downwardly directed part between this upwardly directed part and the outlet opening, and in which the air flow duct is provided with a sudden depression between the upwardly directed part and the substantially flat or downwardly directed part.
  • Such a sudden depression has a particularly advantageous effect on the air flow, in which case a large part of the water in the air which flows through and which is not blocked by the upwardly directed part of the blade and still remains in the centre of the air flow duct, also precipitates onto the bottom blade which delimits the air flow duct.
  • the air velocity between the blades is lowered as much as possible in order to give drops the opportunity to fall onto the blades.
  • This sudden widening has to be provided downstream of the upwardly directed part, and therefore in fact after a curve, in order to be able to achieve the intended effect. If this sudden widening were to be provided in the upwardly directed part, the water could be blown behind the widening by the inflowing wind, as a result of which the widening would lose its effect.
  • Said sudden depression is preferably substantially formed by a dip in the top surface of the blade which delimits the air flow duct at the bottom.
  • each blade Downstream of the sudden depression, preferably as few obstacles as possible are provided in the air flow duct in order to affect the air flow as little as possible downstream of this sudden widening and in order not to limit the ventilation capacity unnecessarily.
  • a reinforcement element and/or a channel, etc. will be provided at the end of the blade, at the location of the outlet opening.
  • the top surface of each blade preferably has a substantially flowing shape between the sudden depression and the outlet opening.
  • a reinforcement element will, for example, usually be provided at the end of the blade, at the location of the inlet opening.
  • the top surface of each blade preferably has a substantially flowing shape between the inlet opening and the sudden depression.
  • the height of the air flow duct for the remainder stays substantially constant between the sudden depression and the outlet opening, essentially up to the outlet opening.
  • fastening elements, a channel, etc. are often provided at this outlet opening in practice which will locally limit the height of the air flow duct at the location of the outlet opening.
  • the height of the air flow duct between the sudden depression and the outlet opening is preferably kept as constant as possible.
  • the sudden depression of a particular embodiment of a louvre according to the invention is situated, viewed in the direction of air through-flow, beyond the halfway point of the depth of the blades.
  • the blades in this case have an upwardly directed part which occupies at least half the depth of the blades in order to ensure a sufficiently large barrier against impinging rain.
  • each blade of a louvre according to the present invention is provided with a pocket with an access opening which is turned towards the outlet opening.
  • a pocket extends along the length of the blade.
  • Such a pocket has another particularly advantageous increasing effect on the air flow, in which case a large portion of the rain which still remains centrally in the air flow duct beyond the sudden widening of the blade, is precipitated on the bottom blade which delimits the air flow duct.
  • Such a pocket is preferably arranged between the upwardly directed part and the substantially flat or downwardly directed part and, still more preferred, forms a transition between the upwardly directed part and the substantially flat or downwardly directed part.
  • the substantially flat or downwardly directed part substantially adjoins the outlet opening.
  • the sudden depression is between substantially 1/3 and substantially 1/2 of the average height of the air flow duct at the location of the flat or downwardly directed part.
  • each blade at the location of the outlet opening of a louvre according to the present invention is preferably situated in a higher position than the end of said blade at the location of the inlet opening.
  • the height of the upwardly directed part is preferably greater than the average height of the air flow duct at the location of said upwardly directed part.
  • the height of the substantially flat or downwardly directed part is preferably smaller than the average height of the air flow duct at the location of said flat or downwardly directed part.
  • a louvre (1) according to the invention as illustrated in Fig. 1 comprises several horizontal, spaced-apart blades (2) which are arranged parallel to one another. In this case, every two successive blades (2) in each case delimit an air flow duct (3) for air to flow through from an inlet opening (4) to an outlet opening (5). As is already known, the blades (2) are in each case click-fitted onto holders (9) of the louvre (1).
  • the louvre (1) furthermore comprises frame profiles (8) in order to be able to fit it in an opening in a wall.
  • the louvre (1) is, for example, configured as a wall ventilator.
  • a louvre (1) according to the invention may, for example, also be configured as a window ventilator or as a blade wall.
  • the blades (2) Adjacent to the inlet opening (4), the blades (2) comprise an upwardly directed part (2a). Adjacent to the outlet opening (5), the blades (2) comprise a downwardly directed part (2b). Between the upwardly directed part (2a) and the downwardly directed part (2b), the top side of each blade (2) comprises a pocket (6) with an access opening which faces the outlet opening (5). This pocket (6) creates a sudden depression (D) between the top (2c) of the blade at the highest spot of the upwardly directed part (2a) and the adjoining downwardly directed part (2b) of the blade (2).
  • D sudden depression
  • the downwardly directed part (2b) does not adjoin the top (2c) of the blade (2), but adjoins the upwardly directed part (2a) with a bend substantially along a distance of the sudden depression (D) just below said top (2c).
  • the blade (2) retains a substantially smooth surface. Only the connecting points by means of which the blade (2) is click-fitted onto a holder (9) of the louvre (1) interrupt the smooth surface underneath the blade (2).
  • the blade (2) On the top side, the blade (2) has a substantially flowing shape, both in the upwardly directed part (2a) and in the downwardly directed part (2b).
  • the sudden depression (D) creates an abrupt disturbance in the flowing shape of the top side of the blade (2).
  • the end (2e) of the blade at the outlet opening (5) is provided with a channel (7) which forms the last limited disturbance of the flowing shape of the top side of the blade (2).
  • the blades (2) of this embodiment are substantially configured in the form of an inverted V shape.
  • the blades (2) could be provided with a second upwardly directed part downstream of the downwardly directed part (2b) and upstream of the outlet opening (5).
  • the upwardly directed part (2a) of the blades (2) extends across more than half the depth of the blades (2) and the height (H3) of this upwardly directed part (2a) is greater than the average height (H1) of the air flow duct (3) at the location of said upwardly directed part (2a) in order to form a sufficiently high barrier together with this upwardly directed part (2a) for drops in the inflowing air.
  • the height (H1) of the air flow duct (3) gradually decreases between the inlet opening (4) and the top (2c) of the blades (2), as a result of which the air velocity between the blades (2) will increase slightly.
  • the sudden depression (D) and the pocket (6) result in a sudden local deceleration in the air velocity, so that drops from the air flowing through can drop onto the downwardly directed part (2b) of the blades (2) beyond the top (2c) of the blades (2).
  • the height (H2) of the air flow duct (3) between the sudden depression (D) and the outlet opening (5) is then substantially constant again in order not to unnecessarily disturb the air velocity further and not to limit the ventilation capacity unnecessarily.
  • the height (H4) of the downwardly directed part (2b) is limited and is smaller than the average height (H2) of the air flow duct (3) at the location of said flat or downwardly directed part (2b).
  • This height (H4) is chosen to be sufficiently large to enable water which lands on this downwardly directed part (2b) to quickly drain away to the channel (7) so that it can be drained off the louvre (1) via this channel (7) in a known manner.
  • the downwardly directed part (2b) furthermore extends across less than half the depth of the blades (2), so that the end (2e) of each blade (2) at the location of the outlet opening (5) is in a higher position than the end (2d) of this blade (2) at the location of the inlet opening (4).
  • Figs. 3 and 4 clearly show that said effects on the air flow through the louvre (1) are actually being achieved.
  • a simulation compares the air flow through an existing louvre ( Fig. 3 ) with the same parameters as the illustrated louvre (1) according to the invention with the air flow through this louvre (1) according to the invention ( Fig. 4 ).
  • the arrows in the figures in each case indicate the air velocity and the direction of the air flow at specific spots across the louvre (1).
  • One such simulation is a so-called CFD simulation (i.e. Computational Fluid Dynamics).

Claims (14)

  1. Volet (1), comprenant au moins deux lames espacées l'une de l'autre sensiblement horizontales (2) qui sont disposées parallèlement l'une à l'autre et qui délimitent un conduit d'écoulement d'air (3) pour permettre à l'air de s'écouler à travers celui-ci à partir d'une ouverture d'entrée (4) jusqu'à une ouverture de sortie (5), dans lequel chaque lame (2) comprend une partie orientée vers le haut (2a) adjacente à l'ouverture d'entrée (4) et comprend une partie sensiblement plate ou orientée vers le bas (2b) adjacente à l'ouverture de sortie (5), caractérisé en ce que le conduit d'écoulement d'air (3) est pourvu d'une brusque dépression (D) entre la partie orientée vers le haut (2a) et la partie sensiblement plate ou orientée vers le bas (2b).
  2. Volet (1) selon la revendication 1, caractérisé en ce que la brusque dépression (D) est sensiblement formée par un saut dans la surface supérieure de la lame (2) qui délimite le conduit d'écoulement d'air (3) dans le bas.
  3. Volet (1) selon l'une des revendications précédentes, caractérisé en ce que la surface supérieure de chaque lame (2) présente une forme sensiblement fuyante entre la brusque dépression (D) et l'ouverture de sortie (5).
  4. Volet (1) selon l'une des revendications précédentes, caractérisé en ce que la surface supérieure de chaque lame (2) présente une forme sensiblement fuyante entre l'ouverture d'entrée (2a) et la brusque dépression (D).
  5. Volet (1) selon l'une des revendications précédentes, caractérisé en ce que la hauteur (H2) du conduit d'écoulement d'air (3) reste sensiblement constante entre la brusque dépression (D) et l'ouverture de sortie (5), essentiellement jusqu'à l'ouverture de sortie (5).
  6. Volet (1) selon l'une des revendications précédentes, caractérisé en ce que la brusque dépression (D) est située, quand on regarde dans la direction de l'écoulement d'air traversant, au-delà du point médian de la profondeur des lames (2).
  7. Volet (1) selon l'une des revendications précédentes, caractérisé en ce que le côté supérieur de chaque lame (8) est pourvu d'une poche (6) comportant une ouverture d'accès qui est orientée en direction de l'ouverture de sortie (5).
  8. Volet (1) selon la revendication 7, caractérisé en ce que la poche (6) est agencée entre la partie orientée vers le haut (2a) et la partie sensiblement plate ou orientée vers le bas (2b).
  9. Volet (1) selon la revendication 8, caractérisé en ce que la poche (6) forme une transition entre la partie orientée vers le haut (2a) et la partie sensiblement plate ou orientée vers le bas (2b).
  10. Volet (1) selon l'une des revendications précédentes, caractérisé en ce que la partie sensiblement plate ou orientée vers le bas (2b) est sensiblement contiguë à l'ouverture de sortie (5).
  11. Volet (1) selon l'une des revendications précédentes, caractérisé en ce que la brusque dépression (D) est comprise entre sensiblement 1/3 et sensiblement 1/2 de la hauteur moyenne (H2) du conduit d'écoulement d'air (3) à l'endroit de la partie plate ou orientée vers le bas (2b).
  12. Volet (1) selon l'une des revendications précédentes, caractérisé en ce que l'extrémité (2e) de chaque lame (2) à l'endroit de l'ouverture de sortie (5) est située dans une position plus élevée que l'extrémité (2d) de ladite lame (2) à l'endroit de l'ouverture d'entrée (4).
  13. Volet (1) selon l'une des revendications précédentes, caractérisé en ce que la hauteur (H3) de la partie orientée vers le haut (2a) est supérieure à la hauteur moyenne (H1) du conduit d'écoulement d'air (3) à l'endroit de ladite partie orientée vers le haut (2a).
  14. Volet (1) selon l'une des revendications précédentes, caractérisé en ce que la hauteur (H4) de la partie sensiblement plate ou orientée vers le bas (2b) est inférieure à la hauteur moyenne (H2) du conduit d'écoulement d'air (3) à l'endroit de ladite partie plate ou orientée vers le bas (2b).
EP12180075.9A 2011-10-04 2012-08-10 Volet Active EP2578958B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE2011/0576A BE1020263A3 (nl) 2011-10-04 2011-10-04 Lamelleninrichting.

Publications (2)

Publication Number Publication Date
EP2578958A1 EP2578958A1 (fr) 2013-04-10
EP2578958B1 true EP2578958B1 (fr) 2016-09-28

Family

ID=46604234

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12180075.9A Active EP2578958B1 (fr) 2011-10-04 2012-08-10 Volet

Country Status (3)

Country Link
EP (1) EP2578958B1 (fr)
BE (1) BE1020263A3 (fr)
PT (1) PT2578958T (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105903296B (zh) * 2016-06-30 2019-01-04 李建农 空气清洗机
GB2567627B (en) * 2017-10-13 2021-12-01 Maple Sunscreening Holdings Ltd Exterior vent-louvre assembly
CN109763608B (zh) * 2018-12-17 2023-12-05 四川麦克威科技有限公司 水平百叶排烟窗

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3771430A (en) * 1972-03-10 1973-11-13 Airolite Co Louver assembly
US4958555A (en) * 1989-10-23 1990-09-25 Mestek, Inc. Sight proof, drainable blade louver assembly
US5906083A (en) * 1997-08-04 1999-05-25 Construction Specialties, Inc. Modular louver system
US7708625B2 (en) * 2006-07-05 2010-05-04 L.C. Eldridge Sales Co., Ltd. Air inlet and outlet hood
JP2009084962A (ja) * 2007-10-03 2009-04-23 Robinhood:Kk 防水及び防雪型換気ルーバ

Also Published As

Publication number Publication date
PT2578958T (pt) 2016-11-08
BE1020263A3 (nl) 2013-07-02
EP2578958A1 (fr) 2013-04-10

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