Device for influencing a gaseous volume flow in a room air conditioning and ventilation system

Abstract

Device for influencing a gaseous volume flow in an air conditioning and ventilation system, wherein the device comprises, on the one hand, a housing, preferably tubular, and, on the other hand, a flap blade (2) pivotably mounted therein between an open position and a closed position about an axis of rotation (1), wherein the housing has a housing wall (3) with a flow cross-section, preferably round or square, and the flap blade (2) is pivotable between an open position and a closed position about the axis of rotation (1), wherein the flap blade (2) is inclined in its closed position, preferably at an angle α of 55° to 85°, particularly preferably at an angle α of approximately 70° or exactly 70°, relative to the flow cross-section of the housing wall (3), and wherein the flap blade (2) has at least one, preferably circumferential, seal (14) in the region of the end face (6) of the flap blade (2).characterized in that the flap leaf (2) has at least one stop area (15) to limit the pivoting travel from the open position to the closed position, wherein each stop area (15) and each seal (14) are coordinated with each other in such a way that in the closed position of the flap leaf (2) each stop area (15) is in contact with the housing wall (3) and each seal (14) abuts the housing wall (3) in a sealing manner.

Description

[0001] The invention relates to a device for influencing a gaseous volume flow in an air conditioning and ventilation system, wherein the device comprises, on the one hand, a housing, preferably tubular, and on the other hand, a flap blade pivotably mounted therein between an open position and a closed position about an axis of rotation, wherein the housing has a housing wall with a flow cross-section, preferably round or square, and the flap blade is pivotable about the axis of rotation between an open position and a closed position, wherein the flap blade in its closed position is inclined, preferably at an angle α of 55° to 85°, particularly preferably at an angle α of approximately 70° or exactly 70°, relative to the flow cross-section of the housing wall, and wherein the flap blade has at least one, preferably circumferential, seal in the region of the end face of the flap blade.

[0002] When a flap leaf known in the prior art is moved from its open position to its closed position, the seal, which is usually a flat lip seal, increasingly presses against the inside of the housing wall as it pivots. With increasing movement towards its closed position, the seal is folded over more and more. For the subsequent opening, i.e., for moving the flap leaf from its closed position to its open position, a significantly higher torque is sometimes required than for the initial movement into the closed position. This is because, during pivoting towards the open position, the strongly folded seal briefly assumes an S-shaped form.

[0003] The object of the invention is to avoid the aforementioned disadvantages and to provide a device in which the torque required to move the flap blade from its closed position to its open position is at least not significantly greater than the torque required to move the flap blade from its open position to the closed position beforehand.

[0004] This task is accomplished by providing the flap blade with at least one stop area to limit its pivoting range from the open to the closed position. Each stop area and each seal are coordinated so that, in the closed position of the flap blade, each stop area is in contact with the housing wall and each seal is in a tight seal against the housing wall. The device could, for example, be a flow regulator, a throttle valve, or a check valve.

[0005] The stop zone defines a precise closed position of the flap blade. This stop zone prevents the flap blade from shifting too far beyond the intended closed position. Consequently, the seal is not folded over so far in the closed position that, when subsequently opening the flap (i.e., when moving the flap blade from its closed position back to its open position), the risk of the seal momentarily forming an S-shape is reduced, at least in the area located furthest from the axis of rotation (perpendicular to the axis). As a result, the torque required to move the flap blade from its closed to its open position is at least not significantly higher than the torque required to move the flap blade from its open to closed position in the first place.

[0006] With a circular flow cross-section of the housing, the flap blade has an elliptical shape. It is advantageous if at least one stop area is arranged at the greatest possible distance from the axis of rotation – viewed orthogonally to the axis of rotation – preferably at the greatest possible distance.

[0007] If the flow cross-section of the housing is rectangular, for example square, the flap blade has a rectangular shape. In this case, at least one stop area is formed by one of the two end faces or edges of the flap blade, which are aligned parallel to the axis of rotation.

[0008] At least one seal is preferably a flat lip seal. The device may have a single circumferential seal. In this case, the seal is not interrupted by the axis of rotation. If both the axis of rotation and the seal are arranged centrally with respect to the circumferential end face, i.e., with respect to the thickness of the flap blade, the seal is interrupted by the axis of rotation. In this case, at least two seals are provided. The contact can be planar, linear, or point-like. The seal can be a single piece or multi-part. The seal can, for example, be a flat lip seal.

[0009] The flap blade can have two opposing flap blade surfaces and a connecting and circumferential end surface with two circumferential end edges.

[0010] At least one stop area can be formed by at least a portion of one of the two circumferential front edges of the key blade itself. For example, a portion of the front edge may protrude slightly, so that only this portion serves as the stop area. However, it is also quite possible that, for example, in the case of an elliptically shaped key blade, the entire front edge of the blade serves as the stop area. In the case of a rectangular key blade, at least one of the two side edges of the blade, which are aligned parallel to the axis of rotation, can serve as the stop area, either along its entire length or only over a portion of it.

[0011] At least one stop area can be designed as a stop surface, wherein the stop surface, when the flap leaf is in the closed position, is aligned parallel to the area of ​​the housing wall against which the stop surface rests in the closed position. With such a design, the stop surface lies flat against the housing wall when the flap leaf is closed.

[0012] The stop surface of at least one stop area can be aligned at an angle β of 5° to 35°, particularly preferably at an angle β of approximately 20° or exactly 20°, to a perpendicular L standing orthogonally on the flap blade surface.

[0013] The angle β between the stop surface and the perpendicular L standing orthogonally on the flap blade surface can be equal to the angle α between the flap blade in its closed position and the flow cross-section of the housing wall.

[0014] The valve leaf can be divided into two halves by the axis of rotation, with at least one stop area being provided on at least one of the two halves. In this case, the two halves are of identical size. If at least one stop area is provided on each half, preferably at least one stop area is arranged on one surface of one half and preferably at least one stop area is arranged on the opposite surface of the other half.

[0015] At least one stop area can be formed as a single piece with the key blade. In such a design, the stop area in question is part of the key blade. In this case, the key blade and the stop area are made of the same material.

[0016] At least one stop area can be designed as part of a stop element formed separately from the flap blade, wherein the stop element is attached to the flap blade, preferably by gluing, soldering, or welding. In such a design, the flap blade and the stop area can be made of the same material or of different materials.

[0017] At least one stop area can be positioned off-center on the flap blade with respect to the longitudinal axis of rotation. Of course, a central position is also possible. An off-center position might be advantageous, for example, if a sampling opening for a measuring device or for pressure measurement is provided in the center of the flap blade.

[0018] At least one stop area can be designed as a fin oriented orthogonally to the longitudinal axis of rotation. The fin can be made of plastic, for example, and, viewed from the side, can have an approximately triangular shape with a small thickness. In this form, it resembles a fin or a rib. Due to its orientation parallel to the flow direction of the gaseous volumetric flow and its small thickness, the fin has little influence on the volumetric flow. The fin can be produced easily, for example, by injection molding.

[0019] At least one stop area can project beyond the end face of the flap blade, wherein the area of ​​the stop area projecting from the end face of the flap blade has a width T of preferably 0.9 mm to 5.1 mm, particularly preferably 1.5 mm to 4.1 mm.

[0020] At least one stop area can be arranged on the flap blade surface, which points in the direction of rotation when the flap blade is pivoted into its closed position.

[0021] The flap blade can be made of plastic, preferably polyamide (PA). Of course, other suitable materials, such as metal, are also possible. The flap blade can, for example, be designed as a sheet metal plate. Alternatively, the flap blade can consist of two plates, such as metal plates, fixed against each other, with a rubber layer provided between the two plates, at least in the edge area, which projects laterally beyond the flap blade and thus forms a circumferential seal.

[0022] The flap blade can have a groove, preferably circumferential, in its end face to receive the seal. In this configuration, part of the seal is located in the groove and held against the flap blade by it, while the part of the seal not in the groove projects from the end face. If the groove is circumferential, the seal is preferably designed as an annular, flat lip seal.

[0023] At least one flap surface of the flap blade can be curved in the edge region adjacent to the front face. This design can reduce flow resistance when the flap blade is open and also any potential noise generation.

[0024] At least one seal can protrude from the circumferential front surface of the flap blade.

[0025] At least one seal can protrude from the end face of the flap blade with a width X between 2 mm and 10 mm, particularly preferably between 3.5 mm and 7.5 mm.

[0026] At least one seal can protrude from the stop area with a width Y of preferably 1 mm to 4 mm, particularly preferably 1.5 mm to 3 mm.

[0027] In this case, at least one seal can be designed as a lip seal, preferably having a thickness D of 0.5 mm to 2 mm, particularly preferably of 1 mm.

[0028] At least one seal can be made of thermoplastic polyurethane (TPU). Of course, other suitable materials are also conceivable.

[0029] For example, it is also conceivable that the seal has a sliding coating. Additionally or alternatively, the housing can have a sliding coating, at least in the area(s) that interact with the seal.

[0030] The housing can have a rectangular flow cross-section, with the two side edges aligned parallel to the axis of rotation being longer than the two side edges aligned orthogonally to the axis of rotation.

[0031] The device can include a drive, preferably electric, that is connected directly or indirectly to the flap blade. In such a configuration, the flap blade can be moved between its positions by a motor.

[0032] The following section explains exemplary embodiments of the invention illustrated in the drawings. The drawings show: Fig. 1 a device according to the invention comprising a housing and a flap leaf, wherein the flap leaf is in its closed position, Fig. 2 the object according to Fig. 1, with the flap in its open position, Fig. 3 detail A from Fig. 1, Fig. 4 detail B from Fig. 2, Fig. 5 a view in the direction of flow of the flap blade after the Fig. 1 to 3 without housing and without axis of rotation, Fig. 6 a top view of a flap blade surface of an alternative design of a flap blade and Fig. 7 to 11 enlarged illustrations of a mounting area of ​​further embodiments of a flap blade with adjacent housing wall.

[0033] In all figures, identical reference symbols are used for identical or similar components.

[0034] The figures show various configurations of a device for influencing a gaseous volume flow in a room air conditioning and ventilation system.

[0035] Each device comprises a tubular housing and a flap blade 2 pivotably mounted therein between an open position and a closed position about a rotational axis 1. The housing has a housing wall 3 with a flow cross-section that is round in the illustrated embodiments.

[0036] The flap leaf 2 can be made of plastic, preferably polyamide (PA), and is pivotably mounted around the axis of rotation 1 between an open position and a closed position. The closed position is in Fig. 1 and the disclosure in Fig. 2 shown. The flap leaf 2 is in its closed position - as shown in the Fig. 1, 3, 7 to 11 is shown - obliquely, i.e. oriented at an angle α of approximately 70° to the flow cross-section of the casing wall 3.

[0037] The flap leaf 2 has two opposing flap leaf surfaces 4, 5 and a connecting and circumferential end surface 6 with two circumferential end edges 7, 8. In the embodiments according to the Fig. 1 to 5 the two flap leaf surfaces 4, 5 of the flap leaf 2 are rounded in the area of ​​the front edges 7, 8, so that the edge area of ​​the two flap leaf surfaces 4, 5 adjacent to the front surface 6 is curved.

[0038] Furthermore, the device includes a drive (not shown), preferably electric, which is connected directly or indirectly to the flap blade 2. The position of the flap blade 2 can be changed by means of the drive.

[0039] The flap blade 2 can have a shaft non-rotatably connected to the flap blade 2, which forms the axis of rotation 1. However, the device can also have a continuous shaft or – as in Fig. 6 indicated - two axle stubs 9 have.

[0040] For example Fig. Figure 6 shows that the flap leaf 2 is divided by the axis of rotation 1 into two identically sized flap leaf halves 10, 11, with a stop area 15 being provided on the left flap leaf half 10.

[0041] In the exemplary embodiment according to Fig. In the flap blade surface 4, a total of eight sampling openings 12 are provided, through which, for example, pressure measurements can be taken. In the illustrated embodiment, an air guide device 13 is arranged adjacent to each sampling opening 12.

[0042] In the area of ​​the circumferential end face 6, the flap blade 2 has at least one seal 14. For fastening the seal 14, the flap blade 2 can have a circumferential groove in its end face 6. If the flap blade 2 is made of plastic, for example, the seal 14 can also be injection-molded. In the illustrated embodiments, the seal 14 projects from the circumferential end face 6 of the flap blade 2. The seal 14 can be made of a thermoplastic polyurethane (TPU).

[0043] In the design according to Fig. 6 The seal 14 is interrupted by the two axle stubs 9 and thus by the axis of rotation 1. Therefore, two seals 14 are provided. If both the axis of rotation 1 and the seals 14 are arranged off-center with respect to the circumferential end face 6, i.e., with respect to the thickness of the flap blade 2, a single circumferential seal 14 may also be provided.

[0044] To limit the pivoting range from the open position to its closed position, the flap blade 2 has at least one stop area 15. Each stop area 15 and each seal 14 are coordinated such that, in the closed position of the flap blade 2, each stop area 15 is in contact with the housing wall 3 and each seal 14 seals against the housing wall 3. For this purpose, for example, Fig. 3 is referenced, in which the closed position of the flap leaf 2 is shown.

[0045] The stop area 15 defines the exact closed position of the flap leaf 2, i.e., the desired and intended closed position. The stop area 15 prevents the flap leaf 2 from shifting too far beyond the desired closed position. This ensures that the seal 14 is not folded over so far in the closed position that, during subsequent opening (i.e., when the flap leaf 2 moves from its closed position back to its open position), the risk of the seal 14 temporarily assuming an S-shaped shape is reduced, at least in the area located furthest from the axis of rotation 1 when viewed orthogonally.Consequently, the torque required to move the flap blade 2 from its closed position to its open position is at least not significantly higher than the torque required to previously move the flap blade 2 from its open position to the closed position.

[0046] For example, in the Fig. 1 and Fig. In the embodiment shown in Figure 2, a stop area 15 is arranged on each of the two flap leaf surfaces 4, 5, on each flap leaf half 10, 11. Each stop area 15 is arranged on the flap leaf surface 4, 5 that points in the pivoting direction 16 when the flap leaf 2 is pivoted into its closed position.

[0047] In the designs, for example according to the Fig. From 7 to 10, the stop area 15 is designed as a stop surface. In the closed position of the flap leaf 2, the stop surface is aligned parallel to the area of ​​the housing wall 3 against which the stop surface rests in the closed position. Thus, there is a surface contact in the closed position.

[0048] The stop surface of stop area 15 is in the Fig. In the embodiment shown in Figure 2, the flap blade is aligned at an angle β of approximately 20° to a perpendicular L perpendicular to the flap blade surface 4, 5. The angle β between the stop surface and the perpendicular L perpendicular to the flap blade surface 4, 5 can be equal to the angle α between the flap blade 2 in its closed position and the flow cross-section of the housing wall 3.

[0049] For example, in the designs according to the Fig. In 2 or 7 to 9, the stop area 15 is formed as a single unit with the flap leaf 2. In contrast, for example, in the design according to Fig. 10 the stop area 15 is designed as part of a stop element 17 formed separately from the flap leaf 2, wherein the stop element 17 is attached to the flap leaf 2, preferably by gluing, by soldering, by welding.

[0050] In the design according to Fig. 6 only one stop area 15 is provided, which is arranged centrally on the flap blade 2 with respect to the longitudinal extent of the axis of rotation 1.

[0051] During the Fig. In the embodiment shown in Figures 1 to 4, each stop area 15 is designed as a fin 18 oriented orthogonally to the longitudinal extent of the axis of rotation 1. The fin 18 can, for example, be made of plastic and produced, for example, by injection molding. Fig. As shown in Figure 2, fin 18, viewed from the side, has an approximately triangular shape. Fig. As can be seen from Figure 6, the thickness of the fin 18 is small. Due to its orientation parallel to the flow direction 19 of the gaseous volume flow and its small thickness, the fin 18 has little influence on the volume flow. In the Fig. In the embodiment shown in Figure 5, the fin 18 is offset by the dimension Z from the central axis of the flap blade 2.

[0052] The area of ​​the stop area 15 projecting from the front surface 6 of the flap blade 2 ( Fig. 4) has a width T of preferably 0.9 mm to 5.1 mm, particularly preferably 1.5 mm to 4.1 mm. The seal 14 has a thickness D of preferably 0.5 mm to 2 mm, particularly preferably 1 mm. How Fig. As can be seen from Figure 4, the seal 14 is designed as a lip seal and projects beyond the end face 6 of the flap blade 2. The portion of the seal 14 projecting beyond the end face 6 of the flap blade 2 has a width X of between 2 mm and 10 mm, particularly preferably between 3.5 mm and 7.5 mm. Furthermore, the seal 14 projects beyond the projecting stop area 15. The portion of the seal 14 projecting beyond the projecting stop area 15 has a width Y of between 1 mm and 4 mm, particularly preferably between 1.5 mm and 3 mm.

[0053] Fig. Figure 11 shows an embodiment in which the stop area 15 is formed by a portion of the circumferential front edge 8 of the flap leaf 2 itself. Thus, in the closed position, there is a linear contact.

Claims

[1] Device for influencing a gaseous volume flow in an air conditioning and ventilation system, wherein the device comprises, on the one hand, a housing, preferably tubular, and, on the other hand, a flap blade (2) pivotably mounted therein between an open position and a closed position about an axis of rotation (1), wherein the housing has a housing wall (3) with a flow cross-section, preferably round or square, and the flap blade (2) is pivotable between an open position and a closed position about the axis of rotation (1), wherein the flap blade (2) is inclined in its closed position, preferably at an angle α of 55° to 85°, particularly preferably at an angle α of approximately 70° or exactly 70°, relative to the flow cross-section of the housing wall (3), and wherein the flap blade (2) has at least one, preferably circumferential, in the region of the end face (6) of the flap blade (2).seal (14) has, , characterized by , that the flap leaf (2) has at least one stop area (15) to limit the pivoting travel from the open position to the closed position, wherein each stop area (15) and each seal (14) are coordinated in such a way that in the closed position of the flap leaf (2) each stop area (15) is in contact with the housing wall (3) and each seal (14) is in a sealing position against the housing wall (3). [2] Device according to the preceding claim, characterized by , that the flap leaf (2) has two opposing flap leaf surfaces (4, 5) and a connecting and circumferential end surface (6) with two circumferential end edges (7, 8). [3] Device according to any one of the preceding claims, characterized by, that at least one stop area (15) is formed by at least one part of one of the two circumferential end edges (7, 8) of the flap blade (2) itself. [4] Device according to any one of the preceding claims, characterized by , that at least one stop area (15) is designed as a stop surface, wherein the stop surface is aligned parallel to the area of ​​the housing wall (3) against which the stop surface rests in the closed position when the flap leaf (2) is in the closed position. [5] Device according to the preceding claim, characterized by , that the stop surface of at least one stop area (15) is aligned at an angle β of 5° to 35°, particularly preferably at an angle β of approximately 20° or exactly 20°, to a perpendicular L standing orthogonally on the flap blade surface (4, 5). [6] Device according to any one of the preceding claims, characterized by, that the flap leaf (2) is divided into two flap leaf halves (10, 11) by the axis of rotation (1), wherein at least one stop area (15) is provided on at least one of the two flap leaf halves (10, 11). [7] Device according to any one of the preceding claims, characterized by , that at least one stop area (15) is formed in one piece with the flap leaf (2). [8] Device according to any one of the preceding claims, characterized by , that at least one stop area (15) is formed as part of a stop element (17) formed separately from the flap leaf (2), wherein the stop element (17) is attached to the flap leaf (2), preferably by gluing, by soldering, by welding. [9] Device according to any one of the preceding claims, characterized by , that at least one stop area (15) is arranged off-center on the flap blade (2) with respect to the longitudinal extent of the axis of rotation (1). [10] Device according to any one of the preceding claims, characterized by , that at least one stop area (15) is designed as a fin (18) oriented orthogonally to the longitudinal extension of the axis of rotation (1). [11] Device according to any one of the preceding claims, characterized by , that at least one stop area (15) projects beyond the end face (6) of the flap leaf (2), wherein the area of ​​the stop area (15) projecting beyond the end face (6) of the flap leaf (2) has a width T of preferably 0.9 mm to 5.1 mm, particularly preferably 1.5 mm to 4.1 mm. [12] Device according to any one of the preceding claims, characterized by , that at least one stop area (15) is arranged on the flap leaf surface (4, 5) which, when the flap leaf (2) is pivoted into its closed position, points in the pivoting direction (16). [13] Device according to any one of the preceding claims, characterized by, that the flap blade (2) is made of plastic, preferably of a polyamide (PA). [14] Device according to any one of the preceding claims, characterized by , that the flap leaf (2) has a groove in its end face (6), preferably circumferential, for receiving the seal (14). [15] Device according to any one of the preceding claims, characterized by , that at least one flap surface (4, 5) of the flap (2) is curved in the marginal area adjacent to the end face (6). [16] Device according to any one of the preceding claims, characterized by , that at least one seal (14) protrudes from the circumferential end face (6) of the flap blade (2). [17] Device according to the preceding claim, characterized by , that at least one seal (14) with a width X between 2 mm and 10 mm, particularly preferably between 3.5 mm and 7.5 mm, protrudes from the end face (6) of the flap blade (2). [18] Device according to any one of the preceding claims, characterized by , that at least one seal (14) with a width Y of preferably 1 mm to 4 mm, particularly preferably of 1.5 mm to 3 mm, protrudes from the stop area (15). [19] Device according to any one of the preceding claims, characterized by , that at least one seal (14) is designed as a lip seal, preferably having a thickness D of 0.5 mm to 2 mm, particularly preferably of 1 mm. [20] Device according to any one of the preceding claims, characterized by , that at least one seal (14) is made of a thermoplastic polyurethane (TPU). [21] Device according to any one of the preceding claims, characterized by , that the housing has a rectangular flow cross-section, wherein the two side edges aligned parallel to the axis of rotation (1) are longer than the two side edges aligned orthogonal to the axis of rotation (1). [22] Device according to any one of the preceding claims, characterized by that the device comprises a drive, preferably electrical, which is connected directly or indirectly to the flap blade (2).

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