GB2472994A - Damper with a plurality of openings and blades - Google Patents

Damper with a plurality of openings and blades Download PDF

Info

Publication number
GB2472994A
GB2472994A GB0914811A GB0914811A GB2472994A GB 2472994 A GB2472994 A GB 2472994A GB 0914811 A GB0914811 A GB 0914811A GB 0914811 A GB0914811 A GB 0914811A GB 2472994 A GB2472994 A GB 2472994A
Authority
GB
United Kingdom
Prior art keywords
blade
blades
closed position
openings
link
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.)
Withdrawn
Application number
GB0914811A
Other versions
GB0914811D0 (en
Inventor
John Mawdsley
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.)
GILBERTS
Original Assignee
GILBERTS
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 GILBERTS filed Critical GILBERTS
Priority to GB0914811A priority Critical patent/GB2472994A/en
Publication of GB0914811D0 publication Critical patent/GB0914811D0/en
Publication of GB2472994A publication Critical patent/GB2472994A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/1406Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by sealing means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/1413Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre using more than one tilting member, e.g. with several pivoting blades
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/1426Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means

Abstract

A damper suitable for controlling air flow, such as in a smoke clearance shaft (18, Fig 1), comprising a housing including a plurality of openings and a plurality of blades 42 arranged to cover the openings; each blade is movable between an open position and a closed position where the air flow is more restricted. The blades may be spaced from each other when in the closed position and may be able to expand due to high temperatures without being restricted. Preferably one edge of each blade is mounted on a pivot. The blades may be actuated by a drive mechanism which may include a rotatable drive shaft, first and second links or by an operating member connected to each blade. Also described is a method of operating the damping device and an air evacuation system in a building with a plurality of floors each including the damping device.

Description

DAMPING ARRANGEMENTS
The present invention relates to a damper device, an air evacuation system and a method of operating a damping device.
Figure lisa cross section through part of the side of a multi storey building 10. The building includes the ground level 12 and first and second floors 14 and 16. A smoke clearance shaft 18 is defined by an outer side wall 20, the sides 22 of the floors 14 and 16 that face the shaft 18 and opposed blade damper assemblies 26, 28, 30.
In the normal condition the known damper assemblies 26, 28, 30 are closed. Should smoke or fire break out in one of the floors then it is desired to extract the smoke out of that floor without the smoke or fire contaminating the other floors. This resists the spread of the fire and aids evacuation. To effect the extraction high temperature exhaust fans 32 at roof level are activated by a fire alarm system (not shown). That same system opens the opposed blades of the assemblies where the floors are contaminated and causes the blades of the uncontaminated floors to remain closed.
This type of damper (as could the damper of the present invention) could also be used on naturally ventilated openings where the same smoke evacuation requirements are necessary.
In other positions units could form part of a total assembly of other components such as external weather Iouvres and internal grillage. They will however still be required to perform the same function.
An electric motor is mounted on the non shaft side of the blade assembly at each floor to cause the opposed blades to open or close.
In opposed blade assemblies each blade, in the closed position has an upper, outwardly facing surface that seals against a lower, inwardly facing surface of an adjacent higher blade.
Further, each blade includes a lower, inwardly facing surface that seals against an upper, outwardly facing surface of an adjacent lower blade. Each blade is mounted about a horizontal pivot which pivots are aligned in a vertical plane. In addition, the ends of each blade seal against an upwardly extending wall.
An upwardly extending bar is pivotally connected by a linkage to the upper edge of each blade.
When the motor moves the bar downwardly the blades are opened with closure being effected by movement in the opposed direction.
A problem with such opposed blade assemblies is that part of the blades move inwardly upon opening. Accordingly should an object on the floor abut or be adjacent to the blades when they are in the closed position that object may hinder or prevent opening of the blades of the assembly.
The blades are required to resist high temperatures and yet still maintain the ability to be opened or closed or to remain closed under extreme conditions. A problem with the blades is that they expand under heat. Accordingly they will buckle as opposed sides of the blades expand to press against walls of the assembly. In addition the blades buckle along the length of their contact. Accordingly an assembly that is required to be closed can leak and leave a floor that should be isolated contaminated. In addition in a floor from which smoke should be evacuated the opposed blades may jamb in the closed position causing the assembly to fail.
It is an object of the present invention to attempt to overcome at least one of the above or other problems.
The present invention is defined in the claims and elsewhere in this specification.
Specific embodiments of the invention will now be described by way of example and with reference to the accompanying drawings in which: Figure 2 is a perspective view of a blade assembly 40; Figure 3 is a side sectional view taken along the line 3-3 of Figure 2.
Figure 4 is a detail taken on the area 4 of Figure 3 with the blades 42 in the closed position with Figure 5 being the same view with the blades 42 in the open position; Figure 6 is a view of the end region of a frame 44 of the assembly showing where the blades seal; Figure 7 is a plan view of the drive mechanism for the blades with Figures 8 and 9 being details on Figure 7 showing the drive part and the driven part respectively.
The blade assembly 40 shown in Figure 2 is arranged, in use, to substitute in place of the blade assemblies 26 or 28 or 30 shown in Figure 1. Figure 2 shows the side of the assembly that faces the interior of a room with the motor 46 and the drive mechanism for the blades.
The blades open, from Figure 4 to Figure 5, into the shaft 18.
A frame 48 seals with the opening provided in the wall of a floor at each side and at the top and bottom by flanges 50. In an alternative embodiment the assembly has top and bottom and side members 52 that seal with the opening in the wall of the building, which members support the frame 48.
The frame 48 includes struts 54 that extend from the top to the bottom of the frame towards each side. The mechanism between the strut 54 and the blade 42 at one side will now be described but it will be appreciated that the mechanism is the same at each side.
Each blade 42 is mounted on a projecting lug 56 about a pivot 58. A link 60 is pivotally mounted to the middle of the blades 42 with the end of the link 60 away from the blade being pivotally connected to a lever 62. The lever 62 is pivotally mounted on the strut 54. An operating bar 64 is pivotally connected to each lever 62.
Looking at Figure 4, when the bar 64 is caused to be moved in an upwards direction the lever 62 is caused to be rotated in an anticlockwise direction. This causes the pivot connection between the lever 62 and the link 60 to be moved downwardly and to the left with the link 60 thereby causing the blades 42 to move to the open position shown in Figure 5 by moving about the pivots 58. Closure of the blades is a reversal of the opening operation with the return being assisted by a spring 66.
In the open position the blades 42 extend outwardly and upwardly with the shaft 18 at an included angle to the horizontal of more than 5° or less than 30° or less than 20° or in the region of 10°. Smoke within the floor is then sucked out of the floor up the shaft 18.
Figure 6 shows the engagement of the blades 42, shown in chain lines, with the frame 48. It can be seen that the blades are spaced from each other and are spaced from the edge of the frame. Consequently the blades can expand or contract in all directions without abutment and without buckling. Whilst the blades have been described as effecting a seal in the closed position it will be appreciated that the seal may not be a total seal. The sealing effect can be enhanced by applying a sealant material around the periphery of the blades or as a border on the frame or both, if desired.
The mechanism to effect the movement of the bars to cause the blades to move between the open and closed positions is shown in Figures 7 to 9.
A drive shaft 68, driven by the motor 64 causes rotation of a drive tube 70.
The drive tube 70 is connected to the pivot mounting of the lever 62 that drives the blade 42 that is second from the bottom, as shown in Figures 4 and 5.
Attention is directed to all papers and documents which are filed concurrently with or previous to this specification in connection with this application and which are open to public inspection with this specification, and the contents of all such papers and documents are incorporated herein by reference.
All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and/or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where at least some of such features and/or steps are mutually exclusive.
Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.
The invention is not restricted to the details of the foregoing embodiment(s). The invention extends to any novel one, or any novel combination, of the features disclosed in this specification (including any accompanying claims, abstract and drawings), or to any novel one, or any novel combination, of the steps of any method or process so disclosed.

Claims (21)

  1. CLAIMS1. A damper device for controlling air flow, the device comprising: (a) a housing including a plurality of openings, and (b) a plurality of blades each being arranged to cooperate with the plurality of openings, each blade being movable between an open position and a closed position, the arrangement being such that air flow through each opening is more restricted when the blade is in the closed position.
  2. 2. A device as claimed in Claim 1 in which, in the closed position, each blade cooperates with the periphery of its associated opening.
  3. 3. A device as claimed in Claim 1 or 2 in which the blades of adjacent openings are spaced from each other when in the closed position.
  4. 4. A device as claimed in any preceding claim in which, in the closed position, adjacent blades are able to expand in a direction towards each other without that expansion being restricted by an abutment.
  5. 5. A device as claimed in any preceding claim in which, in the closed position each blade is able to expand in a direction transverse to an adjacent blade without that expansion being restricted by an abutment.
  6. 6. A device as claimed in any preceding claim in which one edge of each blade is mounted on a pivot to the housing with an opposed edge of the blade being arranged to move towards the opening when moving from the open to the closed position and away from the openinig when moving from the closed to the open position.
  7. 7. A device as claimed in Claim 6 in which each blade is pivotally mounted and is restricted to move through less than 90° when moving between the fully open position and the closed position.
  8. 8. A device as claimed in any preceding claim including a rotatable drive shaft associated with one of the blades which drive shaft is arranged to cause all of the blades to move between the open and closed positions.
  9. 9. A device as claimed in Claim 6 or 7 in which each blade is connected by a link mechanism whereby the drive shaft is arranged to drive a first link in the mechanism to move about a rotational mounting with a second driven link connected to the first link, causing the blades to move about their pivot.
  10. 10. A device as claimed in Claim 9 in which at least one bar is pivotally connected to the first links.
  11. 11. A device as claimed in Claim 10 in which the drive bar is located to one side of the first link with the second link being connected to the other side of the first link.
  12. 12. A device as claimed in any preceding claim including at least one blade operating member connected to each blade whereby movement of the operating member is arranged to cause movement of the blades between the open and closed positions, the operating member being spaced from the ends of the blades.
  13. 13. A device as claimed in Claim 12 in which there are two operating members spaced from each other each operating member being spaced from the ends.
  14. 14. A device as claimed in Claim 12 or 13 when dependent on Claim 10 or 11 in which the or each operating member comprises the bar.
  15. 15. A device as claimed in any preceding claim in which each blade is in a common plane when in the closed position.
  16. 16. An air evacuation system included in a building with a plurality of floors each including a damping device, each damping device comprising: (a) a housing including a plurality of openings, and (b) a plurality of blades each being arranged to cooperate with the plurality of openings, each blade being movable between an open position and a closed position, the arrangement being such that air flow through each opening is more restricted when the blade is in the closed position.
  17. 17. A system as claimed in Claim 16 in which one edge of each blade is mounted on a pivot and is arranged with an opposed edge of the blade moving away from the opening and away from a room of the floor when moving from the closed to the open position.
  18. 18. A system as claimed in Claim 16 or 17 when using a device as claimed in any of Claims ito 15.
  19. 19. A method of operating a damping device comprising moving a plurality of blades from an open position to a closed position with the blades in the closed position the air flow through a plurality of openings of a housing more than when the blades are in the open position.
  20. 20. A method as claimed in Claim 19 when using a device as claimed in any of Claims 1 to 15.
  21. 21. A method as claimed in Claim 19 or 20 when operating an air evacuation system as claimed in Claim 16, 17 or 18.
GB0914811A 2009-08-25 2009-08-25 Damper with a plurality of openings and blades Withdrawn GB2472994A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0914811A GB2472994A (en) 2009-08-25 2009-08-25 Damper with a plurality of openings and blades

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0914811A GB2472994A (en) 2009-08-25 2009-08-25 Damper with a plurality of openings and blades

Publications (2)

Publication Number Publication Date
GB0914811D0 GB0914811D0 (en) 2009-09-30
GB2472994A true GB2472994A (en) 2011-03-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB0914811A Withdrawn GB2472994A (en) 2009-08-25 2009-08-25 Damper with a plurality of openings and blades

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GB (1) GB2472994A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK178221B1 (en) * 2014-04-28 2015-08-31 Skov As Valve unit and method and application
CN107642894A (en) * 2017-08-03 2018-01-30 合肥兆基模具工业有限公司 It is a kind of new anti-oxidation to sweep wind connecting rod

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4241647A (en) * 1979-08-20 1980-12-30 Dayco Corporation Air damper valve
US5788571A (en) * 1997-01-22 1998-08-04 Ivison; John T. Method of venting smoke from highrise residential buildings
US6135880A (en) * 1999-07-15 2000-10-24 Tien-Hou Joseph Ho Adjustable register incorporating a toggle-joint mechanism to move slats thereof between open and closed positions
DE10300935A1 (en) * 2003-01-13 2004-07-22 Valeo Klimasysteme Gmbh Air flow unit especially for a motor vehicle heating ventilation or climate control has many opening and closing flaps formed integrally with a carrier
EP1785201A2 (en) * 2005-11-10 2007-05-16 Jürgen Eidmann Smoke protection device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4241647A (en) * 1979-08-20 1980-12-30 Dayco Corporation Air damper valve
US5788571A (en) * 1997-01-22 1998-08-04 Ivison; John T. Method of venting smoke from highrise residential buildings
US6135880A (en) * 1999-07-15 2000-10-24 Tien-Hou Joseph Ho Adjustable register incorporating a toggle-joint mechanism to move slats thereof between open and closed positions
DE10300935A1 (en) * 2003-01-13 2004-07-22 Valeo Klimasysteme Gmbh Air flow unit especially for a motor vehicle heating ventilation or climate control has many opening and closing flaps formed integrally with a carrier
EP1785201A2 (en) * 2005-11-10 2007-05-16 Jürgen Eidmann Smoke protection device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK178221B1 (en) * 2014-04-28 2015-08-31 Skov As Valve unit and method and application
WO2015165465A1 (en) * 2014-04-28 2015-11-05 Skov A/S Valve unit, a method of opening and closing such a valve unit and use of such a valve unit
CN107642894A (en) * 2017-08-03 2018-01-30 合肥兆基模具工业有限公司 It is a kind of new anti-oxidation to sweep wind connecting rod

Also Published As

Publication number Publication date
GB0914811D0 (en) 2009-09-30

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)