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WO1997039287A1 - Unite de ventilation - Google Patents

Unite de ventilation Download PDF

Info

Publication number
WO1997039287A1
WO1997039287A1 PCT/GB1997/001030 GB9701030W WO9739287A1 WO 1997039287 A1 WO1997039287 A1 WO 1997039287A1 GB 9701030 W GB9701030 W GB 9701030W WO 9739287 A1 WO9739287 A1 WO 9739287A1
Authority
WO
WIPO (PCT)
Prior art keywords
building
ventilation unit
ofthe
unit according
air flow
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.)
Ceased
Application number
PCT/GB1997/001030
Other languages
English (en)
Inventor
Kenneth Herbert Haywood
Paul Christopher Haywood
Mark David Haywood
Kim Stephen Haywood
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.)
ZETA DYNAMICS Ltd
Original Assignee
ZETA DYNAMICS Ltd
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 ZETA DYNAMICS Ltd filed Critical ZETA DYNAMICS Ltd
Priority to AU25180/97A priority Critical patent/AU2518097A/en
Publication of WO1997039287A1 publication Critical patent/WO1997039287A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/745—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity the air flow rate increasing with an increase of air-current or wind pressure

Definitions

  • the present invention relates to a ventilation unit for redirecting fluid flow and more particularly relates to a ventilation unit for a building or like structure requiring control of air passing through it for ventilation purposes whilst protecting the throughput from the influence of excess wind or draughts. .
  • the present invention relates to an improved ventilation unit having a configuration which allows redirection and enhancement of an incident fluid flow by using the energy ofthe wind entering the ventilation unit to control air entry into a duct and thence into the building that it is protecting or in any like situation.
  • a ventilation unit for a building or like structure comprising an incident face having a plurality of vanes , the vanes being arranged substantially parallel to each other so as to form substantially parallel inlets between each vane, each vane or baffle having an upstream and a downstream planar portion, the upstream planar portion being at an angle of 125 degrees to 155 degrees, most preferably 135 degrees to 145 degrees to the downstream portion, and there being a downstream controller capable of directing a portion ofthe incident air flow into an inlet duct of the building or like structure and the remainder ofthe incident air away from the buildinc
  • the downstream controller may be a controlling baffle or baffles adapted to direct air flow into the duct or may be a perforated plate.
  • the ventilation unit may be attached to the surface of a building for example over an existing duct or air brick or may be designed so that it provides a flush fitting with the wall ofthe building to achieve a more aerodynamic effect.
  • the ventilation unit may be fabricated from any suitable material such as plastics, composites or metals.
  • the controller preferably directs part of the air flow into a plenum chamber which has an outlet or outlets to the exterior ofthe building.
  • Fig 1(a) and 1(b) are perspective and side cross-sectional views of a ventilation unit having a regulator or director vane and guide plate.
  • Fig 1(c) shows a schematic diagram of a typical vane showing the inclusive angle of 140 degrees.
  • Fig 1(d) shows a protective cover fitted over the unit of Fig 1(a).
  • Figs 2(a) and 2(b) are perspective and side cross-sectional views of a ventilation unit having an alternative controlling baffle and guide plate arrangement.
  • Figs 3(a) and 3(b) are perspective and cross sectional views of a ventilation unit having a perforated baffle arrangement.
  • Figs 4(a), 4(b), 5(a) and 5(b) are perspective and side cross-sectional views of ventilation units capable of being recessed into an existing duct.
  • Fig 6 shows the relationship of incident air flow and air throughput for a ventilation unit according to the invention and for a conventional air brick
  • Figs 1(a) and 1(b) show a ventilation unit suitable for fitting over an existing duct or air brick.
  • the unit comprises a metal or plastic casing 1 with a sloping outer face 2 which has a plurality of horizontal inlets 3, each inlet 3 comprising a vane 4 at an angle to the inlet plane.
  • the casing 1 is adapted to fit sealingly over the duct 10 or air brick.
  • the vanes 4 are arranged so that the angle between the vane and the front plate of the casing is about 140 degrees.
  • the ventilation unit also has a guide plate 5 and a downstream controlling baffle 6 .
  • a mounting frame 7 with screw holes is provided for fastening the casing 1 to the wall.
  • the casing 1 also encloses a rear guide plate 5 and baffle(s) 6 to balance the energy forces within the unit's body and allow the correct amount of ventilating air through the rear vent 10.
  • the orientation of the controlling baffle 6 is adjusted so as to obtain the optimum air flow into the building.
  • Fig l(c ) shows a diagram of a vane 4 having an angle of about 140 degrees.
  • Fig 1(d) shows a ventilation unit having a protective cover 14.
  • the air stream incident on the outer face 2 passes into the horizontal inlets 3 and is partly redirected by the baffles 6 and guide plate 5 in a downward direction towards a plenum chamber 8.
  • the plenum chamber 8 has side outlets 9 in the casing 1 through which the redirected air flow is passed. The remainder of the air flow passes horizontally through the casing 1 and into the duct 10 and its flow rate is controlled by the angle of orientation of the downstream controlling baffle 6.
  • Fig 2(a) shows a design of ventilation unit with a different shape but which uses the same principles as that in Fig 1 above.
  • the ventilation unit 6 fits to a wall.
  • the unit has a flat fronted casing 11 an horizontal inlet 3 having inlet vanes 4 to redirect wind down the rear of the inlet vanes 4 towards the plenum chamber 8, which is open at both ends at outlets 9 into the outside, windward side.
  • the air flows into the plenum chamber 8 and out through either of the outlets 9 back into the wind.
  • a controlled amount of air flow is directed by the baffle 6 passes through the rear vent ofthe unit and into the building 10, thus providing the required ventilation.
  • the outlets 9 are located in the same incident air flow that is entering the inlet vanes 4.
  • Fig 3(a) shows a ventilation unit which replaces the downstream controlling baffle of Figs 1 and 2 with an upright perforated baffle 12.
  • the plenum chamber 8 is internal, to the rear ofthe unit.
  • a perforated baffle 12 is used for reorientation of the balancing of forces.
  • the variation of design is totally pertinent to an externally designed plenum chamber 8 as in examples shown in Fig 1 and Fig 2 above.
  • the wind hits the ventilation unit and enters through inlet vanes 4 and is redirected down the rear ofthe vanes 4 as air which cascades into plenum chamber 8 and flows out through into the open air, on the windward side through outlets 9.
  • the balance of the forces within the unit are controlled within the inlet vanes 4, plenum chamber 8, and perforated baffle 12.
  • a mounting frame 7 with screw holes surrounds the brick for fastening to a wall, which again is pertinent to all appropriate designs.
  • FIGs 4 and 5 show two further versions: the former being particularly useful in commercial structures as it can be fitted flush into a fabricated or structured wall.
  • the flow diagram characteristics are similar to Figs 1 and 2 and its mode of operation is the same or similar
  • the invention resides in the ability ofthe ventilation unit to allow a fairly steady ventilating air flow through the duct into a building even though the incident air flow velocity may fluctuate widely e.g. during storms or gales.
  • the control ofthe air flow through the duct is achieved by the effect ofthe plurality of vanes and the controller splitting off the bulk ofthe excess air flow into the ventilation unit and directing it to the exterior of the building. This is clearly advantageous as compared to a standard air brick which has little or no ability to compensate for excess incident air flows.
  • Fig 6 shows a graph of incident air velocity into the ventilation unit and the resultant air velocity into the duct. Comparative results are shown for a ventilation unit according to the present invention and for a typical commercial air brick. The results clearly indicate that , for a range of incident air speeds and angles the resultant duct velocity ofthe air for the ventilation unit ofthe invention is relatively unaffected as compared to that ofthe commercial air brick.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Flow Control Members (AREA)
  • Ventilation (AREA)

Abstract

L'invention se rapporte à une unité de ventilation qui est placée sur ou dans un conduit (10) d'admission d'un bâtiment ou d'une construction similaire. Ladite unité a une face exposée à l'air munie d'orifices (3) d'admission horizontaux, formés par des lamelles (4) parallèles. Ces lamelles (4) ont une partie plane en amont et une partie plane en aval, l'angle existant entre ces deux parties variant de 125 à 155 degrés. Une commande (6) située en aval fait fonctionner les lamelles (4) d'admission pour qu'elles laissent passer une partie du courant d'air dans le conduit (10) d'admission du bâtiment, l'air en excès passant dans un plenum d'où il est dirigé vers l'intérieur du bâtiment. Ainsi, l'unité de ventilation laisse passer un courant d'air qui ventile le bâtiment de manière plutôt constante, même lorsque les courants d'air sont forts, par exemple lors de tempêtes ou d'orages.
PCT/GB1997/001030 1996-04-15 1997-04-15 Unite de ventilation Ceased WO1997039287A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU25180/97A AU2518097A (en) 1996-04-15 1997-04-15 Ventilation unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9607766.4 1996-04-15
GBGB9607766.4A GB9607766D0 (en) 1996-04-15 1996-04-15 Building unit

Publications (1)

Publication Number Publication Date
WO1997039287A1 true WO1997039287A1 (fr) 1997-10-23

Family

ID=10792078

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1997/001030 Ceased WO1997039287A1 (fr) 1996-04-15 1997-04-15 Unite de ventilation

Country Status (3)

Country Link
AU (1) AU2518097A (fr)
GB (2) GB9607766D0 (fr)
WO (1) WO1997039287A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1136085B (de) * 1956-08-01 1962-09-06 Joseph Koller Abzweigkasten zu einem Kanal fuer stroemende Luft od. dgl., insbesondere bei Belueftungsanlagen
FR2256377A1 (en) * 1973-12-26 1975-07-25 Bire Andre Ventilator for wall of a caravan - has insect screen and external grille forming forced draught
WO1989007186A1 (fr) * 1988-02-03 1989-08-10 Turbima Oy Trappe de ventilation
US5201879A (en) * 1991-09-18 1993-04-13 S&C Electric Company Vent for enclosures

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB599295A (en) * 1945-10-05 1948-03-09 Greenwood S And Airvac Ventila Improvements in ventilators
GB422853A (en) * 1933-07-19 1935-01-21 Mead Mclean & Company Ltd Improvements in ventilator devices
GB1106384A (en) * 1963-07-31 1968-03-13 Colt Ventilation & Heating Ltd Improvements in or relating to louvred ventilators
US4550648A (en) * 1983-07-11 1985-11-05 Eagle Jon R Attic ventilation system
GB2165039A (en) * 1984-09-06 1986-04-03 Norcros Investments Ltd Louvre assemblies
GB2178159B (en) * 1985-07-25 1989-08-16 Beta Naco Limited Improvements in or relating to fixed louvre ventilators
DE9000648U1 (de) * 1990-01-22 1990-04-26 Huerner Gmbh, 6000 Frankfurt Wetterschutzgitter für Schornsteine
GB2292775B (en) * 1994-09-01 1999-01-06 Zeta Dynamics Ltd Fluid flow device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1136085B (de) * 1956-08-01 1962-09-06 Joseph Koller Abzweigkasten zu einem Kanal fuer stroemende Luft od. dgl., insbesondere bei Belueftungsanlagen
FR2256377A1 (en) * 1973-12-26 1975-07-25 Bire Andre Ventilator for wall of a caravan - has insect screen and external grille forming forced draught
WO1989007186A1 (fr) * 1988-02-03 1989-08-10 Turbima Oy Trappe de ventilation
US5201879A (en) * 1991-09-18 1993-04-13 S&C Electric Company Vent for enclosures

Also Published As

Publication number Publication date
AU2518097A (en) 1997-11-07
GB2312277A (en) 1997-10-22
GB9607766D0 (en) 1996-06-19
GB2312277B (en) 2000-05-10
GB9707586D0 (en) 1997-06-04

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