Roll door system

Abstract

The present invention relates to a roll door system. The roll door system comprises a roll door curtain. The roll door curtain is adapted to be rolled up and unrolled for opening and closing a door opening. The roll door curtain comprises at least one inlet opening. The at least one inlet opening being adapted to receive a flow of a tempered gas. The roll door system further comprises a duct adapted to provide the flow of the tempered gas. The duct comprises at least one supply opening. The at least one inlet opening of the roll door curtain and the at least one supply opening of the duct are aligned such that tempered gas supplied by the duct passes through the at least one inlet 10 opening in a closed state of the roll door curtain.

Description

[0001] ASSA ABLOY

[0002] ROLL DOOR SYSTEM

[0003] Field of the invention

[0004] The present invention relates to a roll door system.

[0005] Background

[0006] Roll doors, also known as rolling doors or roller doors, are a type of door commonly used for industrial, commercial, and residential applications. Conventional roll doors close vertically (closing direction: up-down) or horizontally (closing direction: left-right).

[0007] Known roll doors comprise as a main component a curtain (e.g. connected slats or a flexible curtain). The slats are typically made of plastic or metal (such as steel or aluminum), wherein flexible curtains are oftentimes made of or include PVC. The slats are joined together by hinges, allowing the door to roll up and down as needed.

[0008] Further, a roll-up mechanism is provided, which allows the roll door to be rolled-up into a compact coil above / beneath / aside a door opening, allowing for maximum use of the available space. The roll-up mechanism is typically powered by an electric motor, which can be controlled automatically, remotely and / or manually, e.g. by a wall-mounted switch.

[0009] Further, a roll door comprises lateral tracks or guides. Those are oftentimes extruded from a plastic material or aluminum or may be made of bent and cut sheet metal. For opening and closing, the roll door is guided along those tracks or guides that keep the slats or the curtain in place as they roll up and down. These tracks and guides are typically attached to the wall opening e.g. a door frame or another building structure.Generally, roll doors have only limited insulation, compared to other types of doors, as the slats or the curtain is typically chosen thin to safe space when being rolled up.

[0010] For improving insulation properties if the door is closed, double walled flexible curtains can be used. A cushion formed by the walls of the double walled flexible curtain can be pressurized, thereby providing a rigidly inflated air cushion. The inflated air cushion provides for an improved insulation which may be particularly relevant for roll doors separating areas with different ambient temperatures. For example, roll doors with inflated air cushions are known at entries into cold storage or deep-freeze facilities. These roll doors provide a transition zone between a cold storage or deep-freeze area and a normal storage or non- frozen area.

[0011] However, based on the limited isolation of roll doors, the side of the curtain facing towards the warm or non-frozen area in a cold storage or deep-freeze area may be colder than the ambient temperature of the warmer area. This generally results in the formation of water droplets at this side of the curtain wall, which eventually turn into ice. Thus, independent of using a curtain with connected slats or a single or a double walled flexible curtain, the formation of moisture or ice at curtains separating cooled from non-cooled areas is problematic.

[0012] For example, icing between slats may prevent an opening of the curtain or may over time lead to damages of the hinges between the slats. Similarly, icing on a wall of a flexible curtain bears the risk of damaging the rolling mechanism or a puncturing of the curtain material may occur. Hence, roll doors separating two areas with different ambient temperatures may not work properly or may be damaged over time based on the occurrence of moisture and icing on the curtain.

[0013] For preventing the occurrence of moisture and icing of roll doors, it is known to blow warm air using a large-scale ventilation system onto the roll doors.However, those systems consume a lot of energy, are mostly noisy and prone to failure, and generally inefficient.

[0014] Summary

[0015] It is therefore an object of the invention to provide an improved roll door system that overcomes the aforementioned drawbacks at least partially. Further, the proposed solution shall be less energy consuming.

[0016] The object is achieved by a roll door system according to claim 1. Further aspects of the invention are given in the dependent claims and throughout the following description.

[0017] In particular, the object is achieved by a roll door system comprising a roll door curtain. The roll door curtain is adapted to be rolled up and unrolled for opening and closing a door opening. The roll door curtain comprises at least one inlet opening. The at least one inlet opening is adapted to receive a flow of a tempered gas. The roll door system further comprises a duct. The duct is adapted to provide the flow of the tempered gas and comprises at least one supply opening. The at least one inlet opening of the roll door curtain and the at least one supply opening of the duct are aligned such that tempered gas supplied by the duct passes through the at least one inlet opening in a closed state of the roll door curtain.

[0018] In the closed state, the present invention provides a roll door system in which the tempered gas provided by the duct can be efficiently guided to the roll door curtain through the at least one inlet opening, which is aligned with the supply opening. By this, a targeted application of tempered gas onto the roll door curtain is enabled.

[0019] The present invention is not to be understood as limited to a roll door system with one inlet opening and one supply opening. Instead, various numbers of inlet openings, for example one, two, three, or more, and various numbers ofsupply openings, for example one, two, three, or more, are in accordance with the invention. Moreover, the number of inlet openings may be the same or different to the number of supply openings.

[0020] Further, the term “closed state” as used herein is to be understood as a state in which the roll door curtain is entirely unrolled. In particular, the door opening is completely closed or blocked by the roll door curtain in the closed state. In the closed state, a lower part of the roll door curtain, such as a (rubber) lip, may be in contact with the floor.

[0021] In an open state of the roll door curtain the at least one inlet opening and the at least one supply opening may be arranged such that less than 10%, preferably less than 5%, and most preferably less than 1% of the tempered gas supplied by the duct passes through the at least one inlet opening.

[0022] In the open state, the at least one inlet opening and the at least one supply opening may not be aligned such that essentially little or no tempered gas passes through the at least one inlet opening.

[0023] The term “open state” as used herein is to be understood as a state in which the roll door curtain is entirely rolled up. In particular, the door opening is completely open or unblocked by the roll door curtain in the open state.

[0024] Any arrangement of the roll door curtain between the open state and the closed sate may be referred to as partially open state. In some embodiments, the flow of tempered gas within the duct may be paused or stopped when the roll door curtain is in the open state or starts to move out of the closed state.

[0025] The roll door curtain may comprise first connection means and the duct may comprise second connection means. The first and the second connection means may be adapted to engage with one another in the closed state of the roll door curtain to align the at least one inlet opening and the at least one supply opening. Thus, the first and second connection means can be implemented to ensure ahigh alignment accuracy between the at least one inlet opening and the at least one supply opening. By this, the amount of tempered gas failing to pass through the at least one inlet opening in the closed state can be reduced. Consequently, the overall energy consumption of the roll door system of the present embodiment can be improved.

[0026] The first connection means may comprise a receptacle and the second connection means may comprise a protrusion. Alternatively, the first connection means may comprise the protrusion and the second connection means may comprise the receptacle. In the closed state, the protrusion may be arranged at least in part in the receptacle. The receptacle may further improve the alignment between the at least one inlet opening and the at least one supply opening.

[0027] For example, in a closing movement of the roll door curtain, the protrusion may get in contact with and be guided by the receptacle shortly before the roll door curtain is entirely closed, thereby ensuring a high alignment accuracy in the closed state repeatedly.

[0028] For example, the receptacle may comprise a guide or a cuff.

[0029] The receptacle may comprise an inner wall defining a receiving space. The inner wall may comprise the at least one inlet opening or the at least one supply opening. Additionally or alternatively, the protrusion may comprises a peripheral wall comprising the at least one supply opening or the at least one inlet opening. Arranging the at least one inlet opening or the at least one supply opening at a respective wall of the receptacle and / or the protrusion ensures a high alignment accuracy of the openings in the closed state.

[0030] For example, the inner wall of the receptacle may comprise the at least one inlet opening and the peripheral wall of the protrusion may comprise the at least one supply opening. In another embodiment, the inner wall of the receptacle maycomprise the at last one supply opening and the peripheral wall of the protrusion may comprise the at least one inlet opening.

[0031] The protrusion may comprise an elongated shape. For example, the elongated shape may comprise a rod-like shape or a rectangular shape. The elongated shape may extend in a direction essentially parallel to an opening or closing direction of the roll door curtain. By this, an end of the elongated shape can already engage with the receptacle prior to the roll door curtain reaching the closed state. This enables a guiding of the protrusion into the intended position in or at the receptacle in the closed state. The closing direction of the roll door curtain may be vertically, i.e., up / down, or horizontally, i.e. left / right, depending on the roll door system.

[0032] The receptacle may comprise an elongated shape such that the inner wall of the receptacle and the peripheral wall of the protrusion may be arranged next to each other in the closed state of the roll door curtain.

[0033] For example, the elongated shape may comprise a rod-like shape or a rectangular shape. In some embodiments, the receptacle and the protrusion may have a corresponding shape.

[0034] For example, at least a portion of the elongated shape of the protrusion may be arranged in or at the elongated shape of the receptacle in an exact fit. This provides for a high alignment accuracy of the at least one inlet opening with the at least one supply opening in the closed state. Consequently, an amount of tempered gas failing to pass through the at least one inlet opening can be reduced, which improves an overall efficiency of the roll door system of the present embodiment.

[0035] For example, the at least one supply opening and the at least one inlet opening may overlap by at least 50%, preferably at least 75%, and most preferably at least 99% in the closed state of the roll door curtain. Overlapping by, forexample 50%, may be understood such that 50% of a cross-sectional area of an inlet opening overlaps with the cross-sectional area of a supply opening, or vice versa.

[0036] The protrusion may comprise a front end face. The front end face may comprise a first inlet opening of the at least one inlet opening or a first supply opening of the at least one supply opening. The receptacle may comprise a corresponding first supply or first inlet opening, which may be arranged in an at least partially overlapping manner in a closed state of the roll door curtain. Additionally or alternatively, the peripheral wall - not including the front end face - may comprise a second inlet opening of the at least one inlet opening or a second supply opening of the at least one supply opening. The receptacle may comprise a corresponding second supply or second inlet opening, which may be arranged in an at least partially overlapping manner in a closed state of the roll door curtain.

[0037] As used herein, the term “first” opening shall not be understood as limiting the respective roll door system as comprising only a single opening and not allowing a second one. Similarly, the term “second”, “third” opening and so forth shall not be understood as also requiring a first and / or a second opening, respectively. Instead, these terms are merely used for referencing or naming purposes without limiting the number of openings.

[0038] The at least one inlet opening may comprise a first and a second inlet opening. The at least one supply opening may comprise a first and a second supply opening. A first flow direction from the first supply opening through the first inlet opening may differ from a second flow direction from the second supply opening through the second inlet opening. Based on the different flow directions, multiple flows of tempered gas can be provided to different areas on or in the roll door curtain. For example, if a roll door curtain of the prior art is known to be icing at a specific roll door curtain area, one of the first or the second flow direction can be targeted to prevent the icing in this specific area.Thus, compared to known techniques in which basically the entire roll door curtain is exposed to a flow of tempered gas, only a fraction of the flow may be required based on the efficient distribution of the tempered gas according to the present embodiment. Overall, the energy consumption of the roll door system according to the invention can be reduced while still preventing the roll door curtain from icing.

[0039] In particular, the first flow direction and the second flow direction are not arranged in parallel.

[0040] For example, the first flow direction may run essentially perpendicular to an opening and closing direction of the roll door curtain. The second flow direction may run essentially parallel to the opening or closing direction of the roll door curtain. The term “essentially” as used in here is to be understood as including small deviations up to 10%.

[0041] The protrusion may extend through the at least one inlet opening in the closed state of the roll door curtain. For example, the protrusion may be hollow, and the flow of tempered gas through the at least one inlet opening may run inside the hollow protrusion.

[0042] In some embodiments, the protrusion may comprise more than one supply opening, of which all or only a subset thereof may be arranged on a portion of the protrusion extending through the at least one inlet opening in the closed state. Thus, embodiments in which multiple supply openings may be passing through one inlet opening during a closing movement of the roll door curtain are also in accordance with the present invention.

[0043] The protrusion may comprise a tapered ending, for example a conical ending, such that a diameter of the protrusion increases from a front end face along at least a portion of the protrusion. By this, the diameter of the protrusion may be adapted such that the protrusion can be arranged within the inlet opening in anexact fit manner in a closed state of the roll door curtain. Thus, the protrusion may reduce or entirely prevent a flow of the tempered gas passing the inlet opening while being within the protrusion, exiting the protrusion through the supply opening, and flowing back through the inlet opening outside of the protrusion.

[0044] The second connection means may be attached to or may be an integral part of the duct. By this, a simple and cost-efficient second connection means can be provided.

[0045] The first connection means may comprise a connection piece. The connection piece may be attached to the roll door curtain.

[0046] For example, the connection piece may be attached to the roll door curtain in a lower corner of the roll door curtain. The lower comer may be arranged next to or in contact with a floor in the closed state of the roll door curtain.

[0047] For example, in a roll door system comprising a single layer curtain, the connection piece may be attached to a surface of the roll door curtain facing the area with a higher ambient temperature.

[0048] Moreover, in embodiments comprising a double layered curtain, or a triple layered curtain, the connection piece may either be attached between two layers, in particular providing a cushion formed by these two layers. For example, in the region of the connection piece that layers of the curtain are not attached to each other but attached to the connection piece.

[0049] Alternatively, in these double / triple layered embodiments the connection piece may also be attached to a surface of the roll door curtain facing the area with a higher ambient temperature.Brief description of the figures

[0050] The present disclosure will be more readily appreciated by reference to the following detailed description when being considered in connection with the accompanying drawings in which:

[0051] Fig. 1A shows a schematic front view of an embodiment of a roll door system in an open state of a roll door curtain;

[0052] Fig. IB shows a schematic front view of the roll door system of Fig. 1A in a closed state of the roll door curtain;

[0053] Fig. 2A shows a schematic view of an embodiment of a roll door system in a partly open state, wherein the curtain body is not shown;

[0054] Fig. 2B shows a schematic view of the embodiment of Fig. 2A, wherein the curtain body is shown partially transparent;

[0055] Fig. 2C shows a schematic view of the embodiment of Fig. 2A, wherein the curtain body is shown non-transparently;

[0056] Fig. 3A shows a schematic view of an embodiment of a roll door system in a closed state, wherein the curtain body is not shown;

[0057] Fig. 3B shows a schematic view of the embodiment of Fig. 3 A, wherein the curtain body is shown partially transparent;

[0058] Fig. 3C shows a schematic view of the embodiment of Fig. 3 A, wherein the curtain body is shown non-transparently; and

[0059] Fig. 4 shows a schematic view of an embodiment of a connection piece.

[0060] Detailed description of the figuresFigs. 1 A and IB show schematically an embodiment of a roll door system 3 in two different states according to the present invention.

[0061] The roll door system 3 comprises a roll door curtain 2, a frame 30, an actuator 40 and a pressurization device 50.

[0062] While Fig. 1A shows the roll door system 3 in an open state of the roll door curtain 2, Fig. IB shows the roll door system 3 in a closed state of the roll door curtain 2. In the closed state, a door opening 60 in a wall of a building, in which the roll door system 3 is mounted, is blocked by the roll door curtain 2.

[0063] The roll door curtain 2 comprises a curtain body 20, a connection piece 21, a bottom beam 24, a lip 25, and a top roll 29.

[0064] The curtain body 20 has a rectangular shape and comprises an upper edge, a lower edge and two side edges. At the lower edge of the curtain body 20, the roll door curtain 2 comprises the bottom beam 24. For example, the bottom beam 24 can be attached to the lower edge of the curtain body 20.

[0065] The lip 25 of the roll door curtain 2 is attached to the bottom beam 24 at a lower edge. The lip 25 may be of rubber and serves for sealing the roll door curtain 2 against the floor.

[0066] The top roll 29 is adapted for rolling up and unrolling the roll door curtain 2. The top roll 29 may be attached to the frame 30 or a wall with brackets (not shown) above the door opening 60.

[0067] The size ratio of the top roll 29 to the door opening 60 should be understood as exemplary only and in no way limiting. It is possible, for example, that the top roll 29 has a significantly smaller and / or larger diameter in relation to the door opening 60 than shown in the figures.

[0068] The top roll 29 is an actuated top roll, i.e. the top roll 29 is driven by an actuator 40, such as an electric drive. Said electric drive may be connected via a shaft 41and / or a gearing with a shaft of the top roll 29. When being actuated, the top roll 29 rotates around axis A.

[0069] Depending on the direction of rotation, the roll door curtain 2 is unrolled, such that a curtain body 20 of the roll door curtain 2 closes the door opening 60 at least partially (cf. Fig. IB). In case the direction of rotation is reversed, the roll door curtain 2 is rolled up and the door opens (again), cf. Fig. 1 A.

[0070] The frame 30 comprises guiding means 35. The unrolling and uprolling can be guided by the guiding means 35, which may be guide rails. Guiding means 35 may be attached to or may be an integral part of frame 30 of the roll door system 3.

[0071] The pressurization device 50, such as a blower, a pump or compressor, is adapted to provide a flow of tempered gas to be guided onto curtain body 20.

[0072] Figs. 2 A to 2C depict a magnified excerpt of a lower portion of the roll door system 3 showing the roll door curtain 2 in a partially open state. While in Fig. 2 A, the curtain body 20 is not illustrated, it is shown partially transparent in Fig. 2B and entirely non-transparent in Fig. 2C. Other than the different levels of transparency of curtain body 20, Fig. 2A to 2C show the same magnified excerpt of the roll door system 3.

[0073] The roll door curtain 2 comprises a pipe 1, a connection piece 21, and a double layered curtain body 20 comprising a first curtain layer 26 and a second curtain layer 27. In alternative embodiments, the roll door curtain may comprise more than two layers, for example three, four or more curtain layers.

[0074] The curtain body 20 of the roll door curtain 2 comprises the first curtain layer 26 and the second curtain layer 27, which extend essentially parallel to each other along an entire curtain body width W. The curtain layers 26, 27 may be made of a plastic foil, a non-woven, a fabric or a combination thereof. The curtain layers 26, 27 may in particular be of PVC or PE.The first 26 and the second curtain layer 27 are at least attached to each other in an edge region 28, for example by a seam. In the depicted embodiment, the two layers 26, 27 are attached to each other on both opposite sides of the curtain body 20. Moreover, the first 26 and second layer 27 are both attached to bottom beam 24. Based thereon, the curtain body 20 forms a cushion in its interior. The cushion can be configured to be pressurized at least when the roll door curtain 2 is entirely unrolled (cf. Figs. 3A-3C).

[0075] In an alternative embodiment, the roll door curtain may comprise three curtain layers. At least two of the three layers may be attached to each other on both opposite sides of the curtain body, forming the cushion. The three curtain layers may be attached to a bottom beam.

[0076] Alternatively, the two curtain layers of the two layered curtain body or the three curtain layers of the three layered curtain body may at least in part or entirely not be attached to each other on one or both opposite sides of the curtain body. For example, tempered gas may exit from an interior area between two curtain layers at the sides of the curtain body, in particular at the edge regions. The three curtain layers may be attached to a bottom beam.

[0077] The pipe 1 comprises a rod-like shape having a first front-end face and a second front-end face. The first front-end face and the second front-end face are located at opposite front-ends of the pipe 1.

[0078] The pipe 1 comprises an inlet opening 10, which is arranged on the first frontend face of the pipe 1.

[0079] Moreover, the pipe 1 comprises a plurality of outlet openings 11, 12. The outlet openings 11 are arranged in a straight line distributed in a homogenous or equidistant manner on a peripheral wall of pipe 1.

[0080] It is also conceivable that the openings 11 are arranged differently on the peripheral wall, e.g. with an offset to one another, in a grid, or the like.Additionally, a further outlet opening 12 is provided on the second frond-end face of the pipe 1.

[0081] The pipe 1 is arranged parallel to the bottom beam 24 along curtain body 20 in between the first and second curtain layers 26, 27. For example, the pipe 1 is arranged inside the bottom beam 24.

[0082] In the depicted embodiment, the pipe 1 does not fully extend across the entire width W of curtain body 20. Instead, pipe 1 has a length which is shorter than the curtain body width W. For example, the pipe 1 may extend only up to 85%, 70% or even only up to 50% of the width W.

[0083] However, it is also possible that the pipe 1 extends across the entire curtain body width W. In such embodiments, the front-end outlet opening 12 may be omitted.

[0084] The pipe 1 may be made or may comprise a plastic material and / or a foam material.

[0085] The connection piece 21, which is shown in Figs. 2A - 3C and depicted in more detail in Fig. 4, comprises a base plate 21a, a cuff 21c, a peripheral inlet opening 22 and a front-end face inlet opening 23.

[0086] The base plate 21a has a three-dimensional L-shaped form. The base plate 21a comprises a circumferential edge 21b, which is adapted to be attached to the curtain body 20. The circumferential edge 21b may be beaded.

[0087] In the embodiment depicted in Figs. 2 A to 3C, the connection piece 21 is arranged between the first and second curtain layers 26, 27 in the edge region 28 of curtain body 20. By this, the connection piece 21 forms part of the edge region 28, in a lower corner of curtain body 20. In embodiments with more than two curtain layers, the connection piece 21 may be arranged between any two of the curtain layers.The connection piece 21 may be glued to the first and second layers 26, 27 and may be additionally secured using riveted bolds along the circumferential edge 21b, for example.

[0088] The cuff 21c is located outside of the cushion formed by the curtain body 20. It is attached, in particular screwed, to the longer arm of the L-shaped base plate 21a extending vertically, thereby enclosing a cavity and providing a receptacle. The receptacle has an elongated shape.

[0089] In the region of the cuff 21c, the base plate 21a comprises an opening, in particular the peripheral inlet opening 22. The peripheral inlet opening 22 provides an access to the receptacle.

[0090] A second opening within the base plate 21a, namely the front-end face inlet opening 23, is arranged on the shorter arm of the L-shaped base plate 21a extending horizontally. The front-end face inlet opening 23 and the receptacle provided by the cuff 21c are aligned to each other.

[0091] In the illustrated embodiment of Fig. 2A, next to the peripheral inlet opening 22 of connection piece 21 the pipe 1 is arranged. By this, the inlet opening 10 of pipe 1 is aligned with and attached to the peripheral inlet opening 22 of connection piece 21.

[0092] Alternatively, the pipe 1 and particularly the inlet opening 10 may not be attached to the peripheral inlet opening 22 but may be arranged in a distance of 0,5 cm to 10 cm.

[0093] The frame 30 of roll door system 3 comprises a supply duct 31 (also referred to as duct 31). The duct 31 is attached to frame 30 to ensure the correct positioning and orientation of duct 31.At one end of duct 31 a connection piece 34 is attached. The connection piece 34 has an elongated shape extending vertically, which corresponds to the opening / closing direction D of roll door curtain 2.

[0094] Connection piece 34 is hollow and comprises a peripheral wall comprising a peripheral supply opening 32. Moreover, connection piece 34 comprises a front-end face. The front-end face comprises a further supply opening 33.

[0095] In the depicted embodiment, the connection piece 34 comprises a shape that is adapted to be arranged inside the receptacle provided by connection piece 21 of roll door curtain 2.

[0096] For example, the shape of connection piece 34 is such that it engages with connection piece 21 in an exact fit in a closed state of the roll door curtain 2, which is depicted in Fig. 3 A. In the closed state, the cuff 21c of connection piece 21 encloses a portion of connection piece 34. By this, the roll door curtain 2 is guided into the intended position based on the elongated shape of connection piece 34 engaging with the cuff 21c during a closing motion of the roll door curtain 2.

[0097] In the intended position of the closed state of roll door curtain 2, the openings of connection piece 34 and the openings of connection piece 21 overlap at least partially or may even be aligned with each other.

[0098] For example, as in the shown embodiment, in the closed state, the peripheral inlet opening 22 of connection piece 21 overlaps with peripheral supply opening 32 of the connection piece 34 of duct 31.

[0099] The front-end face inlet opening 23 of connection piece 21 overlaps with frontend face supply opening 33 of connection piece 34. For example, the connection piece 34 extends through the front-end face inlet opening 23 of connection piece 21 in an exact fit. For that, connection piece 34 comprises a tapered ending, forexample a conical ending, to ensure successful insertion even for small misalignments between both connection pieces 21, 34.

[0100] Having the connection piece 34 on one end, the duct 31 is further connected to the pressurization device 50. The pressurization device is adapted to provide a flow of tempered gas.

[0101] Thus, any flow of tempered gas provided by the pressurization device 50 flows inside of duct 31, into connection piece 34 and leaves the connection piece 34 through both of the peripheral supply opening 32 and the front-end face supply opening 33.

[0102] Because of the overlapping or aligned arrangement of the openings 32, 33 of connection piece 34 and the openings 22, 23 of connection piece 21 in the closed state of roll door curtain 2, the flow of tempered gas leaving the connection piece 34 passes through the inlet openings 22 and 23 into the cushion formed by the curtain body 20.

[0103] Thus, a first portion of the flow of tempered gas, in particular the portion passing through the front-end face inlet opening 23, enters the cushion or area formed by the first and second curtain layer 26, 27, directly, in particular without being guided through a pipe. The first portion of the tempered gas enters the cushion in a vertical direction. The first flow can be used for pressurizing the cushion when the roll-door curtain 2 is in a closed state.

[0104] Alternatively, a second pipe may be attached to or arranged next to the frontend face inlet opening 23 to further guide the first portion of the flow of tempered gas to a target area of the roll door curtain 2.

[0105] Moreover, a second portion of the flow of tempered gas, in particular the portion passing through the peripheral inlet opening 22, enters pipe 1 by leaving the connection piece 21 in a horizontal direction. The second portion of the tempered gas is further guided along the interior of pipe 1, until it reaches oneof the outlet openings 11, 12. At the outlet openings 11, 12 this flow of the tempered gas leaves pipe 1 and is directed onto the first 26 and second curtain layer 27.

[0106] In addition to being directed onto the first and second curtain layers 26, 27, the flow of tempered gas passing through the plurality of outlet openings 11, 12 of pipe 1 can, thus, also be used for pressurizing the cushion when the roll-door curtain 2 is in a closed state. However, in other embodiments one or more pipes may also be attached at the outside of a double layered curtain body or a single layered curtain body (not shown) and / or at the outside of bottom beam 24. For example, a second pipe may be arranged parallel to the bottom beam but at a range in between 30% - 50% of the curtain body height H in a closed state of the roll door curtain 2.

[0107] Thus, the flow of tempered gas leaves the connection piece 34 divided into two portions, which each extend in a different, and particularly perpendicular to each other, flow direction. In this manner, the embodiment of the present invention provides for an improved distribution of tempered gas targetable at selected areas of the roll door curtain 2, which, for example, may be prone to moisture or icing generation. This targeted distribution reduces the volume of tempered gas required compared to known solutions, thereby reducing noise exposure, energy costs and improving efficiency.

[0108] While Figs. 2 A to 2C depict an embodiment of the roll door system 3 in a partially open state, i.e. a state in which the inlet openings 22, 23 do not overlap or are not arranged next to the supply openings 32, 33, Figs. 3A to 3C depict the same embodiment of the roll door system in the closed state, i.e. a state in which the inlet openings 22, 23 do overlap or are arranged next to the supply openings 32, 33. Similar to Fig. 2A, in Fig. 3A, the curtain body is not depicted. Further, the curtain body 20 is shown in Fig. 3B in a transparent manner and fully non-transparent in Fig. 3C. Other than the different levels of transparencyof curtain body 20, Fig. 3A to 3C show the same roll door system 3 in a closed state.

[0109] While the embodiments of the present invention depicted in here show two overlapping pairs of openings, the present invention is not to be understood as limited thereto. Instead, less openings, for example one pair, or more openings, for example three, four or more pairs, of overlapping openings are also in accordance with the present invention. Moreover, the number of supply openings may be different from a number of inlet openings. For example, one elongated supply opening may overlap with two inlet openings or vice versa. Furthermore, the number of curtain layers are not limited to embodiments with one or two curtain layers. Instead, three, four or more curtain layers are also in accordance with the present invention.

[0110] The present invention may, of course, be carried out in other ways than those specifically set forth herein without departing from essential characteristics of the invention. The present embodiments are to be considered in all respects as illustrative and not restrictive, and all changes coming within the meaning and equivalency range of the appended claims are intended to be embraced therein.

[0111] List of reference signs

[0112] 1 pipe

[0113] 2 roll door curtain

[0114] 3 roll door system

[0115] 10 inlet opening of pipe

[0116] 11 peripheral outlet openings of pipe

[0117] 12 front-end face outlet opening

[0118] 20 curtain body

[0119] 21 connection piece (curtain)

[0120] 21a base plate

[0121] 21b circumferential edge21c cuff

[0122] 22 peripheral inlet opening of connection piece

[0123] 23 front-end face inlet opening of connection piece

[0124] 24 bottom beam

[0125] 25 lip

[0126] 26 first curtain layer

[0127] 27 second curtain layer

[0128] 28 edge region

[0129] 29 top roll

[0130] 30 frame

[0131] 31 (supply) duct

[0132] 32 peripheral supply opening of duct connection piece 33 front-end face supply opening of duct connection piece 34 connection piece (duct)

[0133] 35 guiding means

[0134] 40 actuator

[0135] 41 shaft

[0136] 50 pressurization device

[0137] 60 door opening

[0138] A axis of rotation

[0139] D opening / closing direction of roll door curtain

[0140] W curtain body width

[0141] H curtain body height

Claims

Claims1. A roll door system (3) comprising:a roll door curtain (2), being adapted to be rolled up and unrolled for opening and closing a door opening (60), the roll door curtain (2) comprising at least one inlet opening (22, 23), the at least one inlet opening (22, 23) being adapted to receive a flow of a tempered gas;the roll door system (3) further comprising a duct (31 ) adapted to provide the flow of the tempered gas, wherein the duct (31 ) comprises at least one supply opening (32, 33); andwherein the at least one inlet opening (22, 23) of the roll door curtain (2) and the at least one supply opening (32, 33) of the duct (31 ) are aligned such that tempered gas supplied by the duct passes through the at least one inlet opening (22, 23) in a closed state of the roll door curtain (2);wherein the roll door curtain (2) comprises first connection means (21 ) and the duct (31 ) comprises second connection means (34), and wherein the first connection means (21 ) and the second connection means (34) are adapted to engage with one another in the closed state of the roll door curtain (2) to align the at least one inlet opening (22, 23) and the at least one supply opening (32, 33);wherein the first connection means (21 ) comprises a receptacle (21 ) and the second connection means (34) comprises a protrusion (34); or vice versa;wherein the protrusion (34) is arranged at least in part in the receptacle (21) in the closed state, and whereinthe protrusion (34) comprises an elongated shape; in particular, wherein the elongated shape extends in a direction essentially parallel to an opening or closing direction (D) of the roll door curtain (2).

2. The roll door system (3) of claim 1 , wherein in an open state of the roll door curtain (2) the at least one inlet opening and the at least one supply opening are arranged such that less than 10%, preferably less than 5%, and most preferably less than 1% of the tempered gas supplied by the duct passes through the at least one inlet opening.

3. The roll door system (3) of claim 2, wherein the receptacle (21 ) comprises an inner wall defining a receiving space, the inner wall comprising the at least one inlet opening (22, 23) or the at least one supply opening (32, 33); and / orwherein the protrusion (34) comprises a peripheral wall comprising the at least one supply opening (32, 33) or the at least one inlet opening (22, 23).

4. The roll door system (3) of claim 3 or 5, wherein the receptacle (21 ) comprises an elongated shape such that the inner wall of the receptacle (21) and the peripheral wall of the protrusion (34) are arranged next to each other in the closed state of the roll door curtain (2).

5. The roll door system (3) of any one of claims 1 to 4, wherein the at least one supply opening (32, 33) and the at least one inlet opening (22, 23) overlap at least to 50%, preferably 75%, and most preferably 99% in the closed state of the roll door curtain (2).

6. The roll door system (3) of any one of claims 1 to 5, wherein the protrusion (34) comprises a front end face, the front end face comprising a first inlet opening (23) of the at least one inlet opening (22, 23) or a first supply opening (33) of the at least one supply opening (32, 33).

7. The roll door system (3) of any one of claims 3 to 6, wherein the protrusion (34) comprises a front end face, and wherein the peripheral wall comprises a second inlet opening (22) of the at least one inlet opening (22, 23) or a second supply opening (32) of the at least one supply opening (32, 33).

8. The roll door system (3) of any one of claims 1 to 7, wherein the at least one inlet opening comprises a first (22) and a second inlet opening (23) and the at least one supply opening comprises a first (32) and a second supply opening (33), wherein a first flow direction from the first supply opening through the first inlet opening differs from a second flow direction from the second supply openingthrough the second inlet opening.

9. The roll door system (3) of claim 8, wherein the first flow direction runs essentially perpendicular to an opening and closing direction (D) of the roll door curtain (2); and / or wherein the second flow direction runs essentially parallel to the opening or closing direction (D) of the roll door curtain (2).

10. The roll door system (3) of any one of claims 2 to 9, wherein the protrusion (34) extends through the at least one inlet opening (23) in the closed state of the roll door curtain (2), in particular wherein the protrusion (34) comprises a tapered, in particular conical ending, such that a diameter of the protrusion (34) increases from a front end face along at least a portion of the protrusion (34).

11. The roll door system (3) of any of claims 1 to 10, wherein the second connection means (34) is attached to or is an integral part of the duct (31 ).

12. The roll door system (3) of any of claims 1 to 11 , wherein the first connection means (21) comprises a connection piece (21), the connection piece (21) being attached to the roll door curtain (2), in particular in a lower corner of the roll door curtain (2), the lower corner being arranged next to or in contact with a floor in the closed state of the roll door curtain (2).

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