• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a fire and smoke damper (10). The fire and smoke damper comprises a closing valve sheath (13) which opens and which closes for example inside a duct or a sheath (12). The fire and smoke damper of the closing damper (13) has a gasket (16) around its perimeter made of a material which expands in heat and which is surrounded by a flexible sealing tape (14) which comprises edge portions (14a1, 14a2), and a portion (14b) from which protrudes at least one sealing lip (14c / 14c1, 14c2) is placed on the perimeter (13 ') of the shut-off valve.
    公开号:BE1018652A5
    申请号:E2009/0070
    申请日:2009-02-06
    公开日:2011-06-07
    发明作者:Raimo Parkkila；Arvi Tolmunen；Kim Hagstroem；Jarno Vuorio；Pauli Viinanen；Janne Summanen
    申请人:Halton Oy；
    IPC主号:
    专利说明:

    ANTI-FIRE AND ANTI-SMOKE VALVE
    The invention relates to a fire and smoke valve.
    The applicant's previous solutions concerning a fire and smoke damping valve are known in the state of the art, and in one of them a heat-dilutable sealing paste is used, this paste being used to close and block the fire and smoke dampers in case of fire. The publication of the applicant's patent FI 89333 has been disclosed previously. In the event of a fire, the sealant pushes the flexible seal against a frame piece to lock the fire and smoke damper before the flexible seal melts.
    One of the difficulties of the known solutions in the state of the art which use an inflatable sealant is that the inflatable seal is exposed to impurities present in the conduit system. In addition, if a so-called combined seal is used, in which the inflatable sealant and the flexible paste are separated, the combined seal does not exhibit good resistance when exposed to the seal. abrasion and therefore - does not have good wear resistance.
    The present application aims to form a new type of fire and smoke-proof valve structure, the fire and smoke-resistant valve including such a solution that closes in case of fire, a closure valve being clogged Reliable in case of fire, this solution allows the structure to remain clean before the appearance of a fire and this shutter solution can also be used as a tight control shutter. In this document, the seal lip of the flexible seal operates as an early-stage check valve when the inflatable seal has not yet responded to the increase in temperature.
    The application proposes to use this fire and smoke-proof valve structure on the perimeter of the closure flap, where an inflatable sealant is placed. In one embodiment, said inflatable sealant is placed in an annular groove between two closure flap framing portions and said closure flap is provided with a flexible seal on its perimeter, e.g. an H-shaped seal. The heat-expandable seal is placed entirely in a protected space between the closure flap body and the flexible seal. Said flexible seal closes the inflatable seal at its annular groove and in case of fire, when the paste of the inflatable seal expands and exits the groove, it pushes the seal flexible, for example an H-seal, against the opposite surface of a connecting portion of the framing piece which may for example be formed by a tube. The frame part has at least one annular groove which can also be angular or spherical and in the middle region of which the flexible seal is pushed back in case of fire under the effect of the expansion of the sealing tape inflatable. The inflatable sealant therefore pushes the flexible seal into its groove, and only then does the flexible seal melt in the event of a fire. On the other hand, the flexible seal will not be substantially damaged, since in the event of a fire, the inflatable seal also prevents the flexible seal from melting completely and the inflatable seal remains intact, clean and unworn under the flexible seal.
    The invention proposes the use of a flexible tape, preferably a silicone tape, which has a profile said H. The side parts of the seal H are placed on both sides of the central connection part of the H-seal placed hermetically against the side walls of the closure flap or closure flap, and when pushed by the body plates, they are placed in a space between the outermost body portions of the body plate and the closing flap. The closure flap or closure flap is preferably formed of a plurality of annular body portions which are stacked one above the other, the diameter of the central portion of the body being smaller than that of the body portions below. Thus, a U-shaped annular space is formed for the inflatable seal which can be formed by a sealing compound, a sealing tape, etc.
    According to the invention, the flexible seal is preferably a silicone seal and the inflatable seal is preferably made of a tumescent material. According to the invention, a tubular piece acts as a sheath piece. However, this is not meant to limit the scope of the invention only to the aforementioned flap whose cross-sectional shape is circular and it is not intended to limit the scope of the invention to a conduit embodiment. circular connected to a frame part. The structure is also suitable in rectangular cross section valve solutions. In certain situations, the fire and smoke control valve according to the invention can also be used as an air flow control valve.
    The inflatable seal is located under the flexible seal, where it is protected. The closure flap structure is monolayer or multilayer, the core layer or a portion of the core layers being dimensioned to be smaller than the outer layers, to form a recess in which the inflatable seal is placed and where it is protected. At the same time, the groove acts as an optimal expansion nest, which directs the expansion of the inflatable seal preferably towards the sheath. Correspondingly, the valve sheath has a groove or grooves in which the inflatable seal can preferably expand.
    The flexible seal comprises at least one sealing tape. In case of fire, the inflatable seal pushes the central portion of the flexible seal against the sheath, forming an area under pressure between the lips of the seal located respectively on the warm side and on the side cold. The flexible seal is preferably made up of two lips and the profile of the sealing tape is an H-profile. The two-lip seal can also be traversed by a rod without this posing any problems. sealing at the valve.
    The invention has the following advantages: in cold conditions, the flexible seal of the lip forms a valve structure that is very tight against smoke, which will remain sealed in case of fire due to the effect of the inflatable seal in normal conditions of use, the flexible seal is very durable although the check valve is used for inspection purposes, under normal conditions of use, the inflatable seal is protected from the environment and the accumulation of dust.
    The fire and smoke protection valve according to the invention is characterized by the features defined in the claims.
    The invention will now be described with reference to certain advantageous embodiments of the invention which are shown in the figures of the accompanying drawings, but it should be noted that the invention is not intended to be limited exclusively to these accompanying drawings.
    FIG. 1A is an axonometric view of the fire and smoke control valve according to the invention, FIG. 1B shows the structure in the direction of arrow k 1 of FIG. 1A, FIG. 2 shows a cross section along the line II of Figure IB; the figure also shows a fire damper mounted in a wall, Figure 3 shows an enlarged scale area Ai of Figure 2, Figure 4A is a partial view of another embodiment of the closure valve; the presentation is similar to that of the closure valve seen from its upper edge shown in Figure 3, Figure 4B is a cross section through a closure valve, wherein the flexible seal 14 shown is connected to the ribbon Inflatable sealing 16, the inflatable sealing strip extending essentially over the entire perimeter 13 ', FIG. 4C represents an embodiment of the invention in which a flexible seal 14 also has an H profile but wherein a structure of a lip 14c of the flexible seal is located on another edge and Figure 4D shows an embodiment in which a flexible seal 14 comprises a lip 14C of the seal, which protrudes from a central zone of the portion 14bi of the sealing tape between the sealing edges 14a, 14a2, the structure having only one seal lip.
    FIG. 1A shows an axonometric view of an anti-smoke and anti-smoke valve according to the invention. Fig. 1B shows the structure in the direction of the arrow ki of Fig. 1A. FIG. 2 represents a cross-section along the line II of FIG. 1B and the figure represents a firewall S. FIG. 3 represents a zone A1 of FIG. 2. The object of the application is a structure of FIG. valve. In this application, this generally means a fire and smoke control valve. In the invention, a flexible seal 14 provided in the fire-resistant and anti-smoke valve 10 prevents the release of smoke into the conduit system at an early stage of fire development, until an inflatable seal 16 has blocked the path of fire progression. The figure shows that the fireproof and anti-smoke valve 10 comprises a tubular sheath 12 which can be formed by an air conditioning tube or a separate tube part. In a sheath 12, there is an opening and closing flap or closure valve 13, which in case of fire can be closed using a mechanism which is not shown in more detail in FIG. , for example under the elastic force of a spring when a thermal fuse is affected. Here, as the heat increases, the closure flap 13 is released and can rotate to a closed position by a spring. The fireproof and anti-smoke valve 10 or closure valve 13 can also be moved by a remote control in a closed position of the sheath, for example a tube 12, for example using a motor M, which is a motor connected to the shaft D0 of the closure flap 13 and which in case of fire rotates the sheath, the conduit, the tube 12 or an equivalent of the closure flap 13 to a closed position.
    Figure 2 shows a cross-section through an anti-fire and anti-smoke valve according to the invention. FIG. 3 represents an area A 1 in FIG. 2. The fireproof and anti-smoke valve 10 comprises a closing flap or closure flap 11 whose axis is central with respect to the vertical central axis Xi of the flap 10 fireproof and anti-smoke. The fireproof and anti-smoke valve 10 comprises a sheath or a tube 12. The closure flap 13 of the fireproof and anti-smoke valve 10 preferably has a circular cross-section. The fireproof and anti-smoke valve 10 placed in the sheath 12, for example in a conduit, in a tube or the like, comprises a groove 17 on the central axis Xi. The groove U is an annular groove open on its perimeter 15 '. The fireproof and smokeproof valve 10 comprises a seal 14 made of a flexible rubber or silicone and which preferably has the profile of an H-seal. The H-seal comprises wall portions on the sides Ηχ ', H2' and a connecting portion H3 which connects them in the central zone. The wall portions Ηχ and H2 on one side of the connecting portion H3 are joined so as to surround the side walls Fir F2 of the closure flap 13 so that the connecting portion H3 itself is placed against the end. 13 'of the closure valve 13. The body 15 of the closure valve 13 itself is formed by several body parts: the body parts 15a, 15a2, 15a3,. .., 15an. Parts 15a2 and 15an are structural portions of the same diameter that form the body portion and the central portion 15a3 has a smaller diameter than theirs. Thus, a U-shaped space is formed and is limited by the side walls of the parts 15a2, 15a4 and the end of the central portion 15a3, is placed in this space the seal 16 consisting of an inflatable material under the action of heat, which in case of fire expands in the space U, is pushed against the connecting portion H3 of the seal H and pushes the flexible seal 14 in the groove or in the cavity 17 of the sheath 12 of the connecting portion H3. When the seal 14 has an H profile, the lower sides Ηχ 'and H2' have the function of fixing edges and the upper sides Ηχ '' and H2 '' have the function of sealing lips. In case of fire, the inflatable seal 16 fills the cavity 17 and blocks the valve 13 relative to the sheath 12, this blocking fire resistant. In case of fire, the flexible seal 14 is first pushed against the sheath 12 in the cavity 17, in which it then melts under the action of heat. Thus, in case of fire, the seal 16 which expands heat first pushes the flexible seal 14 against the sheath 12 and prevents the fire to progress. The seal 16 is made of a tumescent material. The other inflatable seal 20 is also placed in an opening Di of the wall S on the surface of the section 12a of the sheath 12. The inflatable sealing strip 20 is preferably also made of a tumescent material .
    FIG. 3 represents on an enlarged scale the location of the gasket 17 which expands with heat, this location being located at the end of the shutter flap 13 on the perimeter 13 'in a space U situated between the 15a2, 15a3, 15a4 wall structures of the shutter flap 13. The flexible seal 14 is located in a position that covers the end of the closure valve 13, i.e. the perimeter 13 ', while the connecting portion H3 of the seal covers the edge 13 'of the perimeter of the closing flap 13. In case of fire, the heat-expandable seal 16 expands into the U-shaped space and pushes back the connection portion H3 of the flexible seal H against an opposite surface, for example a conduit 12, in an annular groove 17 which is formed therein. The role of the walls Pi, P2 which limit the space U of the flap valve is to direct the expansion direction of the inflatable seal 16 to an annular groove or to annular grooves 17 located in the sheath. The planes ti, t2, ... of the walls 15a, 15a2, 15a3 / are perpendicular to the central axis Yi of the sheath 12.
    FIGS. 4A and 4B show an embodiment of the invention in which a flexible seal is connected to a body 15, the body 15 being preferably formed of plasterboard discs which have the same diameter, a seal sealing strip 16 which expands with heat, preferably a tape, being placed on the perimeter 15 'of the body 15, that is to say on the perimeter 13' of the closure flap 13, essentially over the entire width Li of the perimeter, and a flexible seal 14 which preferably has an H profile is placed above said ribbon. Thus, in the embodiment shown in FIGS. 4A and 4B, the perimeter 15 'is a flat structure over the entire width Li of which seal which expands with heat, preferably a sealing tape 15, is connected to all the disks 15a2, 15a3, 15a4 of the body 15. In the embodiment shown in Figures 4A and 4B, the body 15 is therefore preferably formed by at least two and preferably more than two body parts. disc-shaped 15ai, 15a2, 15a3,. . . In the embodiment of the invention, the outermost disk portions 15a, ..., 15an may be sheet portions which are connected by screws fi, f2 ... or by other means to the disks. in plaster located below. What is essential for the structure is that the seal 14 which includes edge portions 14a, 14a2 and between which there is a connecting portion 14b is placed so that its parts 14a and 14a2 of edge are attached to the body 15, preferably to the discs 15a1, 15a2, and preferably such that the edge portions 14a and 14a2 of the seal 14 are protected between the two disc bodies 15a1, 15a2 and are preferably connected by rivets to the joining disc. The material of the flexible seal 14 is preferably a rubber or a silicone. FIGS. 4A and 4B show that the flexible seal comprises edge portions 14a, 14a2 whose central axes are substantially perpendicular to the central portion 14b, this central portion 14b forming a seal section placed on the perimeter 13 'of the valve 13 which overflows a portion of at least one seal lip 14c whose central axis is perpendicular to the central axis of the central portion 14b.
    An embodiment in which the outermost disks 15a,. .., 15an are also plasterboard or stone discs is included within the scope of the invention. Using plasterboard provides a thermal barrier and is an effective way to prevent heat transfer into the duct system between a burning side and a fire-free side.
    An embodiment wherein the fire and smoke check valve closure has a rectangular or square cross section instead of a circular cross section is included within the scope of the invention. The fire and smoke damper can thus be placed in a square or rectangular duct or in a duct.
    According to the invention, the closure flap or the closure valve 13 can be embedded in a sheath 12, for example a conduit or a tube, the sheath 12 can be further connected to a part called part 11 of the sheath frame, this duct frame portion 11 being connectable to a wall, for example a firewall S, by providing a mid-paste which prevents the fire from passing into the internal space A of the sheath of the sheath frame 11, said half paste that can harden. The bare paste is a paste that prevents the fire from passing and it is for example a paste based on plaster. It is preferably powdery, for example mixable and therefore flowable, and hardens after melting. The flexible seal 14 is preferably made of silicone or rubber. The inflatable seal 16 is preferably made of a tumescent material which expands under the action of heat.
    Fig. 4C shows an embodiment of the flexible seal 14 in which the flexible seal comprises a perimeter core 14b and edge portions 14a and 14a2 connected thereto. The material of the flexible seal 14 is preferably a rubber or silicone and the material of the inflatable seal 16 which is connected to the flexible seal is preferably a tumescent material. Thus, under the action of heat, the inflatable seal 16 pushes the flexible seal 14 against the wall of a conduit or the like, blocks the conduit at this location and prevents the fire from spreading. The function of the flexible seal 14 in the early stage of developing a fire is to prevent smoke from propagating in the conduit system. Thus, when speaking of a fire damper 10, the term used explicitly designates a fireproof and anti-smoke valve.
    Figure 4C shows that the flexible seal 14 includes a seal lip 14c protruding from the center of a portion 14b. In this H-profile, the lip 14c of the seal connects an edge of the central portion of the seal 14. The lip 14c of the seal may comprise an internal hollow space, where the lip joins the seal. sealing is flush and where it is kept aligned. The figure shows that the lip 14c of the seal narrows towards its end. The edge portions 14a and 14a2 of the seal 14 have the function of fastening parts which are placed against a side surface of the disk which forms the closure valve 13 of the body structure and is connected to it, for example by means of rivets. The central axes of said edge portions 14a and 14a2 are positioned so that the center axis of the section 14b of the sealing strip located between them is perpendicular to the center axes of said edge portions. A seal lip 14c protrudes from the central portion 14b of the sealing tape and its central axis is perpendicular to the central axis of the sealing tape section 14b.
    FIG. 4D shows a flexible seal 14 which comprises edge portions 14a and 14a2 and a central portion 14b which connects them together with a lip 14c of seal which projects beyond the central part 14b and which in this case embodiment extends beyond the central zone of the central portion 14b of the seal. .
    The seal 14 is preferably a vulcanized ring or is configured as a ring from one or more tapes. The seal 14 is located as much as possible outside the structure, so that the seal 16 expands under the action of heat in a space completely protected from the outside between the body 15 and the flexible seal 14. The seal 14 may also be attached to the body 15 so that the vulcanized ring 14 of the seal is placed on the perimeter 15 ', so that the parts 14ai and 14a2 of the seal 14 are located as much as possible on the outside, against the side surfaces of the body 15. In this embodiment, the protective sheet is not the outermost and the seal sealing 14 is itself located against a lateral surface of the body 15-, for example a gypsum board or a stone disk, to which it is connected for example by rivets or by other means. In the lip 14c of the seal, the flexible seal 14 comprises a cavity 0 which stiffens the lip 14c of the seal. The lip 14c of the seal narrows towards its tip.
    权利要求:
    Claims (20)
    [1]
    1. Fireproof and anti-smoke valve (10) comprising a duct (12), a closure valve (13) which opens and closes mounted inside the duct (12), a gasket seal (16) consisting of a heat-expanding material mounted on the circumference (13 ') of the closure flap and a flexible seal (14), characterized in that the flexible seal (14) ) comprises parallel portions (14ai, 14a2) of edge fixed at a distance from each other on side surfaces (F1, F2) of the closure flap (13), a median portion (14b) interconnecting the parts of edges (14ai, 14a2) and at least one of the sealing lips (14c, 14ci, 14c2> extending radially from the central portion 14b, which closes the closure valve (13) with sealing on the inner surface of the duct (12), so that the parts (14ai, 14c2) of the gasket (14) and the middle part (14b) completely cover the gasket. an expanding flange (16) mounted on the circumference (13 ') of the closure flap (13).
    [2]
    Fire-resistant and smoke-free valve according to claim 1 or 2, characterized in that the flexible seal (14) is a seal (14) which has an H-shaped profile which comprises a part central (14b) forming the horizontal arm (H3) of the letter H, as well as vertical arms (H1, H2) which are divided into lateral lower parts (14a1, 14a2) located under the central part (14b) and the lips sealing (14cc, 14c2) located above the central portion (14b), so that the central portion (14b) covers the expansible seal (16) mounted on the circumference (13 ') of the closure (13) and the lower side portions (14a1, 14a2) are attached to the side surfaces (F1, F2) of the closure flap (13).
    [3]
    Fire-resistant and smoke-free valve according to claim 1 or 2, characterized in that the inner surface of the duct (12) comprises at least one circular groove (17) which is located through the closure seal (16). which expands in radial direction, which circular groove (17) receives the flexible seal (14) in a fire situation, when the seal (16) consisting of a material that expands pushes the flexible seal (14) against the inner wall of the conduit (12).
    [4]
    4. fire and smoke-proof valve according to any one of claims 1 - 3, characterized in that the cross section of the at least one lip (14c) of the seal is hollow and tapers towards its tip , which keeps aligned the lip of the seal.
    [5]
    5. fire and smoke-proof valve according to any one of claims 1 to 4 characterized in that the closure valve is formed of a plurality of body portions (15ai, 15a2, ...) disc-shaped.
    [6]
    Fire-resistant and smoke-free valve according to any one of the preceding claims, characterized in that the closure valve (13) comprises body parts (15a1, 15a2, 15a3, ...) and at least one intermediate part ( 15a2, 15a3 15a4) between the end portions (15a4 and 15an) of the body, so that the diameter of the at least one of the body portions (15a2, 15a3 15a4) located between the end portions (15ai, 15an) is smaller than than the diameter of the end body portions (15a2, 15an), so that a gap (U) is formed between the inner surfaces of the end body portions (15a2, 15a4) and the circumference of the at least one body portion (15a2, 15a3 15a4), eb U space in which the gasket (16) which expands heat is placed.
    [7]
    Fire-resistant and smoke-free valve according to claim 5 or 6, characterized in that the body parts (15a1, 15a2, ...) are formed of metal plates, plaster, or stone
    [8]
    8. fire and smoke-proof valve according to any one of claims 5-7, characterized in that the edge portions (14ai, 14a2) of the flexible sealing strip (14) are connected to the side surfaces of the flap valve closure (13) which are located under the end portions of the body (15ai, 15n).
    [9]
    9. fire and smoke-proof valve according to any one of claims 1-8, characterized in that the cross section of the conduit (12) is circular and the closure valve (13) is also circular.
    [10]
    10. fire and smoke-proof valve according to any one of claims 1-8, characterized in that the cross section of the duct (12) is rectangular and the closing flap (13) is also rectangular.
    [11]
    11. fire and smoke-proof valve according to any one of claims 1-10, characterized in that the material of the gasket (16) which expands heat is intumescent.
    [12]
    12. A fire and smoke-resistant valve according to any one of the preceding claims, characterized in that the body (15) of the fire-resistant and smoke-free valve has a circular cross-section and is formed of disc plates which are placed against each other.
    12. fire and smoke-proof valve according to any one of claims 1-11, characterized in that the material of the flexible seal (14) is silicone or rubber. some next to each other.
    [13]
    13. fire and smoke valve according to any one of the preceding claims, characterized in that the material of the body (15) is a plasterboard.
    [14]
    A fire and smoke protection valve as claimed in any one of the preceding claims, characterized in that the flexible seal (14) is in the form of a ring formed from at least one ribbon or is a ring-shaped part.
    [15]
    Fire-resistant and smoke-free valve according to one of the preceding claims, characterized in that the discs formed by the body (15) have a cross-section of the same dimensions or have in cross-section the dimensions of a disc. uniform, in that the heat-expanding seal (16) is placed on the perimeter (15 ') of the body (15), in that a ring-shaped flexible seal (14) which expands with heat is placed as outermost possible of said seal (16).
    [16]
    16. A fire and smoke damping damper as claimed in any one of the preceding claims, characterized in that the heat-expanding gasket (16) has a ribbon-shaped or ring-shaped structure. and is placed on the perimeter (15 ') of the body (15) substantially above its width (Li), in that the flexible seal (14), which is the connecting portion H3 which has a profile H-shaped, is most outwardly arranged to form the outermost surface of the perimeter (15 ') of the body (15) and in that the heat-expandable seal (16) is placed between the perimeter (15 ') of the body (15) and the flexible seal (14) in a space entirely protected from the outside.
    [17]
    Smoke and fire damper according to one of the preceding claims, characterized in that the heat-expanding material of the gasket (16) is tumescent and that the gasket material flexible seal (14) is a silicone or a rubber.
    [18]
    Fire-resistant and smoke-free valve according to one of the preceding claims, characterized in that the flexible seal (14) comprises edge portions (14a, 14a2) whose central axes are perpendicular to the central axis of the central section (14b) from which protrudes at least one lip (14c) of seal which is a hollow structure and which preferably narrows towards its tip, which makes it possible to keep the lip of the seal.
    [19]
    Smoke and fire damper according to one of the preceding claims, characterized in that the closure flap (13) is placed inside a duct or duct (12), the sheath (12) or the duct having a circular, square or rectangular cross-section and the closing flap (13) having a corresponding cross section in a circle, square or rectangle.
    [20]
    20. fire and smoke-proof valve according to any one of the preceding claims, characterized in that in the duct or the sheath, is placed a portion (11) framing within which is fixed a paste casting in a space (A) in the frame (11), the structure being fixed to a firewall partition of the frame and the duct or the sheath (12) being placed in the opening (E) of the part of the bottom (11a5) of the frame (11), in that the casting paste (naked) placed in a space (A) is a paste which blocks the fire and which insulates from the heat, this paste melting in space (A ) located in the frame (11) where it then hardens, and that is preferably used a plaster base paste (bare) as pouring paste (bare).
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    同族专利:
    公开号 | 公开日
    PL218538B1|2014-12-31|
    FI20085115A0|2008-02-08|
    FI123298B|2013-02-15|
    SE533620C2|2010-11-09|
    SE0900085L|2009-08-09|
    PL387218A1|2009-08-17|
    FI20085115A|2009-08-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB2259249A|1991-08-23|1993-03-10|Halton Oy|Fire damper and method of sealing a closing element of a fire damper|
    DE20321265U1|2003-10-31|2006-08-03|Wildeboer, Werner|Fire protection mechanism for ventilation system, has flap valve supported around one rotational axis, and sealing strip for sealing gap between air duct line section and valve, when valve is in closed position|
    WO2007068786A1|2005-12-13|2007-06-21|Fläkt Woods AB|Fire damper blade|EP3101363A1|2015-06-01|2016-12-07|TROX GmbH|Shutoff valve for use in a conduit of an air conditioning system or a mechanical smoke ventilation assembly|
    EP3698852A1|2019-02-19|2020-08-26|Dallmer GmbH & Co. KG|Fire protection device|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FI20085115A|FI123298B|2008-02-08|2008-02-08|Fire and smoke damper|
    FI20085115|2008-02-08|
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