EP1838999A1 - Smoke damper - Google Patents
Smoke damperInfo
- Publication number
- EP1838999A1 EP1838999A1 EP05821511A EP05821511A EP1838999A1 EP 1838999 A1 EP1838999 A1 EP 1838999A1 EP 05821511 A EP05821511 A EP 05821511A EP 05821511 A EP05821511 A EP 05821511A EP 1838999 A1 EP1838999 A1 EP 1838999A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- slat
- edge
- strip
- long edge
- sealant
- 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
Links
- 239000000779 smoke Substances 0.000 title claims abstract description 30
- 239000000565 sealant Substances 0.000 claims abstract description 45
- 230000002522 swelling effect Effects 0.000 claims abstract description 3
- 238000009423 ventilation Methods 0.000 claims abstract description 3
- 230000008961 swelling Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 4
- 239000012812 sealant material Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C2/00—Fire prevention or containment
- A62C2/06—Physical fire-barriers
- A62C2/12—Hinged dampers
- A62C2/14—Hinged dampers with two or more blades
-
- 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
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
- F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C2/00—Fire prevention or containment
- A62C2/06—Physical fire-barriers
- A62C2/065—Physical fire-barriers having as the main closure device materials, whose characteristics undergo an irreversible change under high temperatures, e.g. intumescent
-
- 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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/33—Responding to malfunctions or emergencies to fire, excessive heat or smoke
-
- 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
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
- F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
- F24F13/1406—Air-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
Definitions
- the present invention relates to a smoke damper in accordance with the preamble of claim 1 , the damper comprising a substantially rectangular frame installable in a ventilation air duct, the frame having pivotally mounted thereon at least one rotatable slat, the slat(s) being rotatable with the help of a separate mechanism by about 90° between an open position and a closed position, the slat having a first long edge and a second long edge as the opposite slat edge relative to the first edge, and the slat further having an elastic seal and an intumescent sealant attached thereto, whereby the intumescent sealant is attached at least onto the first long edge so as to extend substantially over the entire length of the slat edge.
- Forced central air-conditioning systems generally serve very different spaces connected to each other.
- a facility of separating such spaces from each other has become indispensable. Since the forced-air ducts may under a fire act as efficient distributors of combustion gases, flames and heat, it has become extremely important to develop automatically shutting dampers in air ducts.
- modern air- conditioning systems are compartmentalized and the divisions separating the compartmentalized spaces are provided with smoke dampers, for instance.
- Smoke dampers are used in air ducts having either a circular or rectangular cross section. From Fl Pat. No. 105129 is known a smoke damper suited for installation in a round duct.
- the present invention is directed to both a smoke damper installable in an air duct of rectangular cross section and a smoke damper installable in round ducts with the help of mounting flanges.
- the smoke damper disclosed herein incorporates at least one slat adapted to be openable/closable by a separate actuator, whereby the slat(s) in the closed position serve to prevent access of combustion gases through the smoke damper under a fire.
- a smoke damper functions such that under normal operating conditions the damper is open, i.e., has its slat or slats rotated substantially parallel to the air flow.
- the control system has connected thereto a sensor that is capable at a temperature rise or detection of smoke (due to fire) of triggering the actuator mechanism rotating the slats, whereby the slats are rotated by 90° thus closing the air duct.
- a fire damper having at least one shut-off element (slat) and an actuator capable of forcing the shut-off element into its closed position in a fire situation.
- This fire damper features an elastic seal and an intumescent sealant capable of swelling under heat, both elements being arranged in such a fashion relative to each other in the closed position of the damper that in a fire situation under the heat allows the intumescent sealant to compress the elastic seal against its backing surface thus preventing air flow past the elastic seal before the elastic seal begins to melt.
- Fl Utility Model No. 5654 discloses a seal structure for a fire damper using a conventional elastic seal and an intumescent seal swelling under heat.
- the fire damper construction of this utility model is implemented by way of providing the air-duct-closing element with a seal of intumescent material cast in place and a separate elastic seal, such as a rubber or silicon seal, that makes the damper air-tight when it is closed at a normal temperature.
- the cast intumescent sealant is located relative to the elastic seal so that it after casting secures the elastic seal in place. Hence, clamping the elastic seal in place does not need any separate worksteps, but rather, after casting and curing, the cast intumescent sealant serves as clamping means for the elastic seal.
- the base flange of the continuous-section elastic seal remains embedded in the cast intumescent sealant.
- the elastic seal and the intumescent sealant are located either at the edge of the rotatable shut-off element (slat) or in the wall part of the fire damper. In this arrangement, however, the elastic seal is invariably situated partially embedded in the intumescent sealant.
- the fire damper according to the invention is characterized in that the intumescent sealant is attached at least onto one long edge of the slat so as to extend substantially over the entire length of the slat edge and that the intumescent sealant is covered by a continuous- section strip capable of moving outward from the long slat edge under the swelling action of the intumescent sealant.
- a preferred embodiment of the exhaust air damper according to the invention is characterized in that the intumescent sealant is seated in a groove made onto the second long edge and having a continuous-section metallic strip located therein so as to cover the intumescent sealant.
- Another preferred embodiment of the exhaust air damper according to the invention is characterized in that the cross section of the metallic strip is substantially V-shaped and that the strip is located onto the intumescent sealantinto the groove in such a position the V-shaped corner edge of the strip is pointing outward from the groove.
- a still another preferred embodiment of the exhaust air damper according to the invention is characterized in that the first long edge of the slat has a groove substantially identical with that made on the second long edge, and that these grooves are situated close to the corners of the slat edges such that, when two adjacent slats face each other by their edges in the closed position of the damper, the elastic seal running along the long edge of one slat meets the long edge of the next adjacent slat on the nongrooved area of the adjacent long slat edge thus sealing the interslat gap, and that the groove made on the long edge of said next adjacent slat contains intumescent sealant covered by said continuous-section strip in such a fashion that a gap remains between the covering strip and the nongrooved area of the long edge of the next adjacent slat in a situation where the intumescent sealant has not undergone swelling.
- the smoke damper disclosed herein offers extended gas-tightness during the progress of a fire by virtue of having the intumescent sealant protected by the metallic strip from the tendency of the sealant to become brittle under progressing fire.
- FIG. 1 shows a smoke damper in a view taken along the air duct with the damper slats in their closed position
- FIG. 2 shows a partially sectional side view of the smoke damper of FIG. 1 ;
- FIG. 3 shows a cross-sectional view of a slat in a smoke damper according to the invention.
- FIG. 4 shows a cross-sectional view of a preferred embodiment of the continuous-section strip covering the intumescent sealant.
- FIG. 1 therein is shown a smoke damper according to the invention as seen in the direction of an air duct.
- the smoke damper com- prises a substantially rectangular frame 1 and, adapted therein, mutually parallel aligned slats 2, the number of which in the embodiment illustrated in the drawings is four.
- the slats are pivotally mounted onto the frame of the smoke damper with the help of shafts 6.
- the slats 2 are in their closed position, i.e., shutting off the entire cross section of the air duct, whereby air flow through the smoke damper is prevented.
- this is the position into which the smoke damper is triggered under a fire situation.
- a more detailed description of the actuating mechanism of the slats and actuator means thereof may be omitted herein, since such means can be readily implemented using any appropriate technique known in the art.
- the long edges of the slats are provided with seals 3, 4 serving to seal the interslat gap when the slats are in their closed position.
- a slat 2 according to the invention in an enlarged scale.
- the slat is advantageously made of sheet steel so that both long edges 2', 2" of the slat have substantially identical grooves 5 fabricated thereon.
- the grooves run close to the corners of the slat long edges such that the first long edge 2' has the groove made asymmetrically in regard to the groove of the second long edge 2".
- the reference numerals 2', 2" of the slat long edges denote the edge surfaces that are parallel to the slat's axis of rotation.
- the term "slat long edge” does not necessarily imply that the slat edges have to be as long as the end-to-end length of the slat.
- the grooves 5 running along the long edges of the slat are shaped in a conventional fashion so as to make the thick base flange of the rubber seal 3 to seat firmly in the groove.
- the opposite long edge 2" of slat 2 has the bottom space of its groove 5 filled with an intumescent sealant 4.
- a metallic continuous-section strip 7 advantageously made of the same material as the slat 2 proper. The strip can be readily inserted in place by way of pushing it into the groove via one end thereof. The ends of the slat keep the strip firmly seated.
- the metallic strip 7 is made substantially V-shaped and placed into the groove so that the tips of the sides of the V-shape strip rest substantially abutting the bottom of the groove as shown in FIG. 3. In this fashion the intumescent sealant 4 remains trapped under the inside surface of strip 7. During normal operating conditions, the metallic strip 7 remains firmly clamped in place by virtue of its V-shape.
- FIG. 4 is shown the cross section of the metallic strip 7. As illustrated therein, one side 7" of the strip is made slightly wider than the other side T. The strip is inserted into the groove into such a position that the narrower side T will be aligned closer to the centerline of the long edge 2" of slat 2.
- Grooves 5 are situated close to the corners of edges 2', 2" in such a fashion that, when two adjacent slats face each other by their edges in the closed position of the damper, the elastic seal 3 running along the long edge 2' of one slat meets the long edge of the next adjacent slat on the nongrooved area of the adjacent long slat edge thus sealing the interslat gap and, further, that the groove made on the long edge of said next adjacent slat contains intumescent sealant 4 covered by said continuous-section strip 7 in such a fashion that a gap remains between the covering strip and the nongrooved area of the long edge of the next adjacent slat in a situation where the intumescent sealant has not undergone swelling.
- the slats 2 are closed whereby their long edges face each other.
- the initial sealing effect is provided by conventional rubber seals 3 that are pressed against the adjacent slat edge.
- the intumescent sealant With increasing temperature, the intumescent sealant begins to swell thus forcing the metallic strip outward from the groove 5. Under the outwardly expelling force, the sides of the metallic strip approach each other, whereby the metallic strip can move slightly outward from the groove 5 and become compressed against the opposed long edge of the adjacent slat.
- the damper still remains gas-tight by virtue of the metallic strip 7 acting as a compressive seal under the pressure exerted by the intumescent sealant 4.
- the smoke damper according to the invention need not necessarily have all the slats 2 of mutually identical shape and, furthermore, their structure may be varied from that shown in FIG. 3.
- not all slats need be provided with an intumescent seal structure with the provision that a given slat always mates on its both edges with adjacent slats having an intumescent seal structure of the type described above.
- the outermost slats will be designed appropriately in regard to the design principles discussed herein.
- the intumescent sealant can be any material known in the art and capable of performing the desired function.
- the material of the covering strip 7 is selected with regard to the constraint that it must be fire-resistant at least to a certain degree.
- the grooves 5 of the slat edges may be implemented differently from that shown in the drawing. Theoretically the grooves could even be omitted, whereby alternative designs of the intumescent sealant and its covering strip might be contemplated. Obviously the number of slats is neither limited. One or more slats can be used as appropriate. Further obviously, the intumescent sealant and its covering strip may have a design supported to the slat ends while such a construction is not described in greater detail in the drawing and description part of this application.
- the shape and structure of the covering strip may be varied from that illustrated in the drawings.
- the strip can as well be a U-shaped continuous-section strip running over the entire length of slat long edge.
- the intumescent sealant must be placed under the covering strip.
- a still further possible embodiment comprises clamping the strip by its one side to the slat long edge, whereby the other side can move under the force exerted by the swelling of the sealant.
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air-Flow Control Members (AREA)
- Gasket Seals (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20050049A FI120848B (en) | 2005-01-17 | 2005-01-17 | The flue gas damper |
PCT/FI2005/000545 WO2006075045A1 (en) | 2005-01-17 | 2005-12-22 | Smoke damper |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1838999A1 true EP1838999A1 (en) | 2007-10-03 |
EP1838999A4 EP1838999A4 (en) | 2010-06-09 |
EP1838999B1 EP1838999B1 (en) | 2018-02-14 |
Family
ID=34112601
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05821511.2A Active EP1838999B1 (en) | 2005-01-17 | 2005-12-22 | Smoke damper |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1838999B1 (en) |
DK (1) | DK1838999T3 (en) |
FI (1) | FI120848B (en) |
NO (1) | NO340152B1 (en) |
WO (1) | WO2006075045A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3916316A1 (en) * | 2020-05-29 | 2021-12-01 | Rf-Technologies nv | Ventilation element with seals |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2823862B1 (en) * | 2013-07-10 | 2016-10-12 | Ekovent Ab | Damper assembly for ventilation system |
GB2534877B (en) * | 2015-02-02 | 2020-12-23 | Flamgard Engineering Ltd | Fire damper assemblies |
EP3603750A1 (en) * | 2018-07-31 | 2020-02-05 | Grempco S.A. | Smoke control damper and its sealing |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1586362A (en) * | 1977-08-12 | 1981-03-18 | Dufaylite Dev Ltd | Strip seal containing expandable materials |
FR2661100A1 (en) * | 1990-04-20 | 1991-10-25 | Hamon | Flame protection and fire break system for an element such as a door or panel, and device incorporating this flame protection system |
GB2259249A (en) * | 1991-08-23 | 1993-03-10 | Halton Oy | Fire damper and method of sealing a closing element of a fire damper |
DE29507931U1 (en) * | 1995-05-13 | 1995-08-10 | Wildeboer Werner Dipl Ing | Shut-off element for a fire protection shut-off device |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI5654A (en) | 1914-03-12 | Soederhamns Nya Verkst S Ab | Anordning vid stockvagnar | |
US3980272A (en) * | 1974-05-16 | 1976-09-14 | Nittan Company, Limited | Fire smoke damper |
GB2216220B (en) * | 1988-03-03 | 1992-11-11 | Mann Mcgowan Fabrications Ltd | Fire damper sleeves |
IE62225B1 (en) * | 1988-05-30 | 1995-01-11 | Wen Plast Research And Dev | Improvements in or relating to a door |
GB9307256D0 (en) * | 1993-04-07 | 1993-06-02 | Baines Bernard D | Fire dampers |
FI105129B (en) | 1999-03-31 | 2000-06-15 | Flaekt Oy | Flue gas damper |
FR2799495B3 (en) * | 1999-10-08 | 2001-11-09 | Bernard Sorlin | GASKET FOR FIRE-RESISTANT DOOR AND METHOD FOR PROVIDING IMPROVED FIRE RESISTANCE AND RESISTANCE |
-
2005
- 2005-01-17 FI FI20050049A patent/FI120848B/en active IP Right Grant
- 2005-12-22 WO PCT/FI2005/000545 patent/WO2006075045A1/en active Application Filing
- 2005-12-22 EP EP05821511.2A patent/EP1838999B1/en active Active
- 2005-12-22 DK DK05821511.2T patent/DK1838999T3/en active
-
2007
- 2007-08-16 NO NO20074196A patent/NO340152B1/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1586362A (en) * | 1977-08-12 | 1981-03-18 | Dufaylite Dev Ltd | Strip seal containing expandable materials |
FR2661100A1 (en) * | 1990-04-20 | 1991-10-25 | Hamon | Flame protection and fire break system for an element such as a door or panel, and device incorporating this flame protection system |
GB2259249A (en) * | 1991-08-23 | 1993-03-10 | Halton Oy | Fire damper and method of sealing a closing element of a fire damper |
DE29507931U1 (en) * | 1995-05-13 | 1995-08-10 | Wildeboer Werner Dipl Ing | Shut-off element for a fire protection shut-off device |
Non-Patent Citations (1)
Title |
---|
See also references of WO2006075045A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3916316A1 (en) * | 2020-05-29 | 2021-12-01 | Rf-Technologies nv | Ventilation element with seals |
Also Published As
Publication number | Publication date |
---|---|
NO340152B1 (en) | 2017-03-13 |
DK1838999T3 (en) | 2018-05-28 |
FI120848B (en) | 2010-03-31 |
FI20050049A (en) | 2006-07-18 |
EP1838999B1 (en) | 2018-02-14 |
EP1838999A4 (en) | 2010-06-09 |
NO20074196L (en) | 2007-08-16 |
FI20050049A0 (en) | 2005-01-17 |
WO2006075045A1 (en) | 2006-07-20 |
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