Ventilation grille

Abstract

comprising ventilation grilles (100), - at least one plug-in lamella (101) and at least one stabilizing lamella (101'), wherein the at least one plug-in lamella (101) has at least one plug-in tab (102) at one longitudinal end and at least one fixing lug (108) at the other longitudinal end, and the stabilizing lamella (101') has a plug-in tab (102) at one longitudinal end, - a frame (103) with cutouts (104) for the insertion of the plug-in tabs (102), wherein - the stabilizing lamella (101') has a locking hook (107) and a fixing lug (108) at the longitudinal end opposite the plug-in tab (102) and has a bending tab (109) at the longitudinal end of the plug-in tab (102), which in bent form cooperates with the frame (103) as a fixation.

Description

[0001] The invention relates to a ventilation grille according to claim 1.

[0002] Ventilation grilles with a wide variety of grille designs are common. They are used in technical buildings or other buildings with electrical equipment (e.g., transformers). To ensure adequate ventilation, especially for electrical equipment, a certain free ventilation cross-section is required. Large ventilation cross-sections in confined spaces are achieved through a delicate grille design, which makes the grille easily damaged, necessitating time-consuming and costly repairs and / or replacement. Furthermore, such delicate grilles are unstable and / or difficult to install. Common designs involve welding the louvers to the frame, or manufacturing the frame and louvers as a single piece, resulting in significant material waste.

[0003] The invention aims to improve the prior art accordingly.

[0004] The problem is solved according to the invention with a ventilation grille according to claim 1. Embodiments are the subject of the embodiments.

[0005] According to the invention, a ventilation grille is proposed comprising at least one plug-in louver and at least one stabilizing louver, wherein the at least one plug-in louver has at least one plug-in tab at one longitudinal end and at least one fixing lug at the other longitudinal end, and the stabilizing louver has a plug-in tab at one longitudinal end, a frame with recesses for inserting the plug-in tabs, wherein the stabilizing louver has a locking hook and a fixing lug at the longitudinal end opposite the plug-in tab and has a bending tab at the longitudinal end of the plug-in tab, which in a bent form interacts with the frame as a fixing.

[0006] Because of the use of plug-in slats, there is no need to manufacture an entire grille as a whole and replace it if damaged. Furthermore, the use of bendable tabs offers the advantage that only standard tools are required for both installation and replacing individual slats.

[0007] The stabilizing lamella(s) advantageously serve to stabilize the frame through the bent bending tab, while the plug-in lamella(s) are simply inserted without undergoing any deformation during assembly. Bending or deforming the bending tab can be a plastic deformation. Each plug-in lamella can have at least one plug-in tab at one longitudinal end and at least one fixing lug at the opposite longitudinal end. The plug-in lamella can only form plug connections with the frame. The plug-in tab(s) and / or fixing lug(s) serve this purpose. This facilitates very simple assembly. Alternatively, the fixing lug can also rest against the inside of the frame for support.

[0008] Each stabilizing lamella can have at least one plug-in tab and at least one bending tab at one longitudinal end, and at least one locking hook and at least one fixing lug at the opposite longitudinal end. The stabilizing lamella can form a plug connection(s) with the frame via the plug-in tab(s). The stabilizing lamella can form a forming connection(s) with the frame via the bending tab(s). For this purpose, the corresponding bending tab is inserted into a recess and then bent. The bending can be in the range of 45° to 90°. The stabilizing lamella can form a hook connection(s) with the frame via the locking hook(s). The stabilizing lamella can form a plug connection(s) with the frame via the plug-in tab(s).

[0009] The recesses contain or can accommodate inserted tab(s), locking hooks, fixing lug(s), and / or bending tab(s). The frame may be screwed together. The recesses in the frame, with their insertable components, allow for the easy insertion of all plug-in and stabilizing louvers, enabling pre-assembly of the ventilation grille. This simplifies installation. The ventilation grille may allow air to flow through it in one direction.

[0010] The invention allows for an increase in the mechanical strength of the entire ventilation grille while simultaneously reducing the assembly effort.

[0011] According to further training, at least one plug-in lamella and / or stabilizing lamella can have an L- or V-shaped cross-section. The L- or V-shaped cross-section provides protection against poking when positioned close enough together, as a straight connection from one side to the other through the ventilation grille is not possible.

[0012] According to one design, the ventilation grille includes at least three but no more than five stabilizing lamellae. Using at least three stabilizing lamellae allows for stiffening of the overall structure both in the middle and at each end. If ventilation grilles become unstable due to their size, they can be made more robust by adding extra stabilizing lamellae. Experience has shown that five stabilizing lamellae are sufficient to create a sufficiently stable ventilation grille.

[0013] In another variant, the ventilation grille includes more plug-in louvers than stabilizing louvers. Preferably, the ventilation grille contains a higher number of plug-in louvers, as these can be easily replaced if damaged due to the way they are connected, and are very easy to install.

[0014] According to further training, the frame, at least one plug-in slat, and at least one stabilizing slat are made of metal. Besides the diverse manufacturing processes available, metal offers extremely high stability combined with good flexibility and good resistance to external stresses such as vandalism and weathering. Furthermore, metal is sufficiently plastically deformable, ensuring that the bending tab is permanently formed. For disassembly, the bending tab can be easily bent back.

[0015] In another version, the metal is galvanized. Galvanizing greatly increases weather resistance and, depending on the design, can also offer aesthetic advantages.

[0016] According to further training, the metal is powder-coated. Powder coating can be applied to metals, whether galvanized or not, for aesthetic reasons as well as for corrosion protection.

[0017] One particularly advantageous option involves first galvanizing the metal and then powder coating it. This combines the aforementioned advantages.

[0018] In another variant, all plug-in and stabilizing slats are connected to the frame exclusively by force-fit and / or form-fit. The elimination of additional connecting elements, such as screws or rivets, between the slats and frame allows for their assembly and / or replacement without the use of special tools, resulting in significant time and cost savings. Furthermore, this also eliminates all thermal joining processes. Thermal input into the slat and / or grid can cause undesirable warping of the respective component. This variant allows for the use of more delicate components, as they do not have to withstand heat during assembly.

[0019] In a further development, the ventilation grille features a water box with a drip edge. This ensures that in the event of water ingress, such as during heavy rain, the water can drain away safely, thus preventing moisture damage to the object being ventilated. Preferably, the drip edge is 7 mm high.

[0020] According to further training, the water tank is connected to the frame exclusively by force-fit and / or form-fit, preferably riveted. This prevents possible damage to the anti-corrosion coating, which is essential, especially in this area with increased humidity, to prevent premature replacement of the part.

[0021] In another design, the bending tab is longer than the plug-in tab. This increased length allows for gentle bending, for example by folding it over with a soft-faced hammer, thus preventing damage to the coating and consequently to the corrosion protection. Furthermore, the greater length provides sufficient leverage, allowing for effortless bending.

[0022] According to further training, the bending tabs have a length of 12 mm and / or a width of 4 mm. This allows the space in the frame recesses and the distance to the next slat to be fully utilized.

[0023] In a further development, the stabilizing lamella comprises two adjacent bending tabs. The design with two adjacent bending tabs is particularly advantageous because it further reduces the force required for bending, thus protecting the anti-corrosion coating. The proximity of the two bending tabs also prevents rotation around the longitudinal axis of the stabilizing lamella. The distance between the two bending tabs can range from 0.5 mm to 20 mm; preferably from 8 mm to 12 mm; and more preferably 10 mm. In the undeformed state, the two adjacent bending tabs can extend longitudinally along the stabilizing lamella. In the formed state, both adjacent bending tabs can extend in the same or opposite directions. The same direction facilitates bending, as both bending tabs can be bent simultaneously. Opposite directions can serve as anti-rotation protection.

[0024] A further development requires that the stabilizing slats have recesses for attaching expanded metal mesh for insect protection. These recesses can be eyelets. Insect protection is not only particularly advantageous for purely aesthetic and hygienic reasons, but also serves as protection, especially if the object to be ventilated contains exposed live electrical components.

[0025] In one possible configuration, the expanded metal can represent an additional stabilizing element. Areas, especially those to which it is attached or located between the fixings, are designed to be particularly robust or rigid.

[0026] According to further training, the stabilizing louvers can have a comb strip as an anti-rotation feature. Although the shape of the louvers already provides anti-rotation protection for geometric reasons, it is particularly advantageous to stiffen them with an additional element for larger ventilation grille diameters.

[0027] According to a further development, in the assembled state, the bending tab(s) are bent relative to the longitudinal extent of the stabilizing lamella, preferably against the frame, while the plug-in tab and / or the locking hook and / or the fixing lug of the stabilizing lamella extend along the longitudinal extent of the stabilizing lamella. This particularly advantageous development ensures quick assembly and replacement of individual lamellae, as only the bending tabs need to be folded over or folded back.

[0028] According to another development method, in the assembled state, the plug-in tab and / or the locking hook and / or the fixing lug of the plug-in lamella extend along the length of the stabilizing lamella. This makes it particularly easy to install and replace the plug-in lamellae.

[0029] In one possible embodiment, the distance between adjacent plug-in louvers and / or stabilizing louvers can be in the range of 18 mm to 21 mm, preferably 19.5 mm. This serves to optimize airflow while simultaneously ensuring protection against pokes. The distance can be vertical and independent of the specific louver design (plug-in louver or stabilizing louver). Preferably, the frame of the ventilation grille is designed to be continuous. A four-sided frame enhances stability.

[0030] According to the invention, a lamella is also proposed which, in cross-section, has an inflow section, followed by a middle section, and followed by an outflow section, wherein the inflow section and the outflow section enclose an angle with each other in the range of 90° to 130°, preferably 105°. The angle can be a first angle. The sections can be directly adjacent to each other and / or give the lamella a trapezoidal cross-sectional contour. The sections can be arranged adjacent to each other in the direction of flow. The lamella can be referred to as a flow lamella. Preferably, all lamellae of the ventilation grille are flow lamellae.

[0031] Such a louver exhibits optimal flow characteristics and provides a free ventilation cross-section in the range of 40% to 60%. The large ventilation cross-section, combined with a good resistance coefficient of the louver, increases the positionability of the objects to be ventilated, as sufficient ventilation is ensured even with small ventilation areas, thus enabling smaller designs. Conventional ventilation grilles offer at best a free ventilation cross-section of 30-40% and / or a resistance coefficient (ζ) of 15 to 20 or lower. Due to its geometric design, the louver according to the invention can have a resistance coefficient (ζ) in the range of 10 to 12, preferably 11.3.

[0032] A louver with such optimized air resistance reduces the ventilation area required for a building or station. The ventilation requirement depends, for example, on the transformers used or on an electrical system and its power losses; it also dictates the required enclosure class. With the louver according to the invention, the ventilation area can be reduced, which not only lowers manufacturing and production costs but also improves the building's flexibility. This naturally also applies to accessible stations.

[0033] The geometry of the louver allows for tool-free manufacturing. This means that the louvers, ventilation grilles, and doors incorporating the ventilation louver(s) can be manufactured with less material, at a lower price, and in a shorter time.

[0034] Furthermore, the material requirements and manufacturing costs of the louvers can be reduced, as the improved flow characteristics decrease the required ventilation area. At the same time, the maneuverability of technical buildings equipped with a ventilation grille fitted with the louvers according to the invention can be improved. This maneuverability is enhanced, among other things, by the fact that the smaller ventilation area means fewer areas, particularly those adjacent to the ventilation area, need to be kept clear around the technical building.

[0035] The improved flow resistance reduces the material required for louvers, thus saving material in the production of ventilation elements.

[0036] The main advantages of the lamella according to the invention are the low pressure losses due to a very low flow resistance, resulting from the geometry and the advantageous manufacturability of the lamella and the associated possibility of simple assembly.

[0037] The lamella can be a plug-in lamella or a stabilizing lamella, particularly as disclosed. The lamella can have a transverse depth of 57 mm to 60 mm. This serves to optimize flow. The lamella can have a total height of 22 mm to 25 mm, preferably 23.4 mm. This also serves to optimize flow. The central section can have a transverse depth of 30 mm to 35 mm, preferably 32.7 mm. This also serves to optimize flow. It is conceivable that the outflow section can have a transverse depth of 25 mm to 30 mm, preferably 26 mm. This also serves to optimize flow. The total length of the lamella can be in the range of 200 mm to 2200 mm, preferably 672 mm, 872 mm, or 1072 mm.

[0038] According to a further development, the angle between the inflow section and a vertical is between 50° and 70°, preferably 60°. This angle leads to improved flow characteristics, as the air can flow optimally outwards over the central section. The angle can be a second angle.

[0039] According to a further development, the angle between the outflow section and a vertical is between 35° and 55°, preferably 45°. This angle leads to improved flow characteristics, as the air can flow optimally from the central section. The angle can be a third angle.

[0040] According to further training, the middle section and / or the upstream section and / or the downstream section can have a straight cross-section. This serves to improve flow and simplify manufacturing.

[0041] According to further training, the central section can run parallel to the top and / or bottom of the frame when assembled. This serves to improve airflow.

[0042] According to the invention, a ventilation grille is further proposed comprising at least one louver as disclosed and a frame. The frame can be a frame as disclosed.

[0043] According to the invention, a door frame is further proposed, comprising a ventilation grille as disclosed.

[0044] Further features, details and advantages of the invention will become apparent from the wording of the claims and from the following description of exemplary embodiments with reference to the drawings. The drawings show: Fig. 1. A perspective view of a ventilation grille, Fig. 2 a perspective view of the ventilation grille from the opposite direction, Fig. 3 a perspective view of two plug-in slats, Fig. 4 a perspective view of a stabilizing lamella, Fig. 5 a top view of a stabilizing lamella, Fig. 6 a perspective view of a water tank, Fig. 7 a cross-sectional view of the ventilation grille and Fig. 8 a detailed view from Fig. 7.

[0045] In the figures, identical or corresponding elements are designated with the same reference numerals and are therefore not described again unless expedient. Features already described are not described again to avoid repetition and are applicable to all elements with the same or corresponding reference numerals, unless explicitly excluded. The disclosures contained in the entire description are transferable analogously to identical parts with the same reference numerals or component designations. Furthermore, the positional designations chosen in the description, such as top, bottom, side, etc., refer to the directly described and illustrated figure and must be applied analogously to any new position.Furthermore, individual features or combinations of features from the different exemplary embodiments shown and described can also represent independent, inventive or inventive solutions.

[0046] The Fig. 1 and Fig. Figure 2 each shows a perspective view of a ventilation grille 100, consisting of a surrounding frame 103 with cutouts 104, plug-in louvers 101, stabilizing louvers 101' and a water tank 105. Fig. Figure 2 shows a comb strip 111 which is attached to the receptacles 102 of the stabilizing lamellae (101').

[0047] The Fig. Figure 3 shows two plug-in lamellae 101, each rotated 180° so that both long ends are visible in the foreground. Two plug-in tabs 102 are shown on one long side and two fixing lugs 108 on the other long side. The plug-in tabs 102 and fixing lugs 108 are guided in corresponding recesses 104 in the frame 103 and are not bent over.

[0048] The Fig. 4 and Fig. Figure 5 shows a stabilizing lamella 101' in detail. On one longitudinal side, next to the plug-in tab 102, this lamella has two adjacent bending tabs 109. These tabs are inserted into the recesses 104 of the frame 103, and to complete the assembly, the bending tabs 109 can be folded over with a soft-faced hammer, thus achieving a force-fit and form-fit connection. Each bending tab 109 can have a length of 12 mm and a transverse depth of 4 mm. The distance between the bending tabs 109 can be 10 mm. A connection area 112 can be present between the bending tabs 109. The connection area can be 10.5 mm from the free end of the bending tabs 109. On the opposite longitudinal side, the stabilizing lamella 101' has a locking hook 107 and a fixing lug 108. The locking hook 107 is guided into a recess 104 in the frame 103, while the fixing nose 108 only rests against the frame 103.The stabilizing lamella 101' also has insets 110 on one long side.

[0049] The Fig. Figure 6 shows a water tank 105, which serves to collect any water that has entered the system. A drip edge 106 facilitates the drainage of the water.

[0050] Fig. 7 and Fig. Figure 8 shows a cross-section of the ventilation grille 100. Flow vanes 101" are also visible. It can be seen that the adjacent vanes 101, 101", 101" have a spacing of 18 mm to 21 mm, with the spacing being in the vertical direction H. Each of the plug-in vanes 101 and stabilizing vanes 101' is designed as a flow vane 101".

[0051] Each flow vane 101" has in cross-section an inflow section 113, followed by a middle section 114, and then an outflow section 115, all of which are straight. The inflow section 113 and the outflow section 115 form a first angle W1 with each other. The inflow section 113 forms a second angle W2 with a perpendicular S1. The outflow section 115 forms a third angle W3 with a perpendicular S2. In the illustrated assembly position, the middle section 114 runs parallel to the top surface O of the frame 103.

[0052] The invention is not limited to one of the embodiments described above, but can be modified in a variety of ways. All features and advantages arising from the claims, the description, and the drawings, including design details, spatial arrangements, and process steps, can be essential to the invention both individually and in various combinations.

[0053] The invention encompasses all combinations of at least two of the features disclosed in the description, the claims and / or the figures.

[0054] To avoid repetition, features disclosed by the device itself shall also be deemed disclosed by the process and be claimable. Likewise, features disclosed by the process shall be deemed disclosed by the device itself and be claimable. Reference symbol list 100 ventilation grilles 101 Plug-in slat 101' Stabilizing blade 101" flow vane 102 Plug-in tab 103 frames 104 Omission 105 Water tank 106 Drip lip 107 locking hooks 108 Fixing nose 109 Bending tab 110 recording 111 comb strips 112 Connection area 113 Inflow section 114 Middle section 115 Outflow section H Upward direction Q transverse direction L Longitudinal direction O Top S1 Vertical S2 Vertical S3 Flow direction W1 first angle W2 second angle W3 third angle

Claims

[1] comprising ventilation grilles (100), - at least one plug-in lamella (101) and at least one stabilizing lamella (101'), wherein the at least one plug-in lamella (101) has at least one plug-in tab (102) at one longitudinal end and at least one fixing lug (108) at the other longitudinal end, and the stabilizing lamella (101') has a plug-in tab (102) at one longitudinal end, - a frame (103) with cutouts (104) for the insertion of the plug-in tabs (102), wherein - the stabilizing lamella (101') has a locking hook (107) and a fixing lug (108) at the longitudinal end opposite the plug-in tab (102) and has a bending tab (109) at the longitudinal end of the plug-in tab (102), which in bent form cooperates with the frame (103) as a fixation. [2] Ventilation grille (100) according to claim 1, characterized by, that the at least one plug-in lamella (101) and / or stabilizing lamella (101') has an L- or V-shaped cross-section. [3] Ventilation grille (100) according to one of the preceding claims, characterized by at least three stabilizing louvers (101') but at most five stabilizing louvers (101'), and / or, wherein the ventilation grille (100) has more plug-in louvers (101) than stabilizing louvers (101'). [4] Ventilation grille (100) according to one of the preceding claims, characterized by , that the frame (103), the at least one plug-in slat (101) and the at least one stabilizing slat (101') are made of metal, preferably the metal is galvanized and / or powder-coated. [5] Ventilation grille (100) according to one of the preceding claims, characterized by , that all plug-in and stabilizing lamellae (101, 101') are exclusively connected to the frame (103) by force and / or form locking. [6] Ventilation grille (100) according to one of the preceding claims, characterized by , that the bending tab (109) has a greater length than the plug-in tab (102). [7] Ventilation grille (100) according to one of the preceding claims, characterized by , that the stabilizing lamella (101') comprises two adjacent bending tabs (109). [8] Ventilation grille (100) according to one of the preceding claims, characterized by , that the stabilizing lamellae (101') have a comb strip (111) as anti-rotation protection. [9] Ventilation grille (100) according to one of the preceding claims, characterized by, that in the assembly state the bending tab(s) (109) is / are bent relative to the longitudinal extent of the stabilizing lamella (101'), preferably is / are laid against the frame (103), but the plug-in tab (102) and / or the locking hook (107) and / or the fixing lug (108) of the stabilizing lamella (101') extend in the longitudinal extent of the stabilizing lamella (101'). [10] Ventilation grille (100) according to one of the preceding claims, characterized by , that in the assembled state the plug-in tab (102) and / or the locking hook (107) and / or the fixing lug (108) of the plug-in lamella (101) extend in the longitudinal extension of the stabilizing lamella (101'). [11] lamella, characterized by, that in cross-section it has an inflow section (113), followed by a middle section (114) and followed by an outflow section (115), wherein the inflow section (113) and the outflow section (115) enclose an angle (W1) with each other in the range of 90° to 130°.

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