EP2578958A1 - Volet - Google Patents

Volet Download PDF

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Publication number
EP2578958A1
EP2578958A1 EP12180075.9A EP12180075A EP2578958A1 EP 2578958 A1 EP2578958 A1 EP 2578958A1 EP 12180075 A EP12180075 A EP 12180075A EP 2578958 A1 EP2578958 A1 EP 2578958A1
Authority
EP
European Patent Office
Prior art keywords
directed part
louvre
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.)
Granted
Application number
EP12180075.9A
Other languages
German (de)
English (en)
Other versions
EP2578958B1 (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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Renson Sunprotection Projects NV filed Critical Renson Sunprotection Projects NV
Publication of EP2578958A1 publication Critical patent/EP2578958A1/fr
Application granted granted Critical
Publication of EP2578958B1 publication Critical patent/EP2578958B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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.
  • 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.
  • a second upwardly directed part is then provided between said downwardly directed part and the outlet opening 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.
  • This known solution is particularly suitable to block water from inflowing air (wind), but in many cases not sufficient to block water from air flowing through (ventilation) to a sufficient degree.
  • 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).

Landscapes

  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
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 true EP2578958A1 (fr) 2013-04-10
EP2578958B1 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)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105903296A (zh) * 2016-06-30 2016-08-31 李建农 空气清洗机
WO2019073269A1 (fr) * 2017-10-13 2019-04-18 Maple Sunscreening Limited Ensemble ventelle d'aération extérieure
CN109763608A (zh) * 2018-12-17 2019-05-17 四川麦克威科技有限公司 水平百叶排烟窗

Citations (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
GB2328013A (en) * 1997-08-04 1999-02-10 Specialties Const Louver assembly
US20080009233A1 (en) * 2006-07-05 2008-01-10 L. C. Eldridge Sales Co., Ltd. Air inlet and outlet hood
WO2009044847A1 (fr) * 2007-10-03 2009-04-09 Robin Hood Co., Ltd. Grille de ventilation étanche à l'eau et à la neige

Patent Citations (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
GB2328013A (en) * 1997-08-04 1999-02-10 Specialties Const Louver assembly
US20080009233A1 (en) * 2006-07-05 2008-01-10 L. C. Eldridge Sales Co., Ltd. Air inlet and outlet hood
WO2009044847A1 (fr) * 2007-10-03 2009-04-09 Robin Hood Co., Ltd. Grille de ventilation étanche à l'eau et à la neige

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105903296A (zh) * 2016-06-30 2016-08-31 李建农 空气清洗机
WO2019073269A1 (fr) * 2017-10-13 2019-04-18 Maple Sunscreening Limited Ensemble ventelle d'aération extérieure
CN109763608A (zh) * 2018-12-17 2019-05-17 四川麦克威科技有限公司 水平百叶排烟窗
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

Also Published As

Publication number Publication date
PT2578958T (pt) 2016-11-08
BE1020263A3 (nl) 2013-07-02
EP2578958B1 (fr) 2016-09-28

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