Air guide grille

Abstract

Air guide grilles, particularly for use in cleanrooms, with lateral brackets on which a plurality of spaced-apart louvers are held at a predetermined angle of inclination, wherein the louvers have several fastening means on their end faces facing the brackets, which fastening means are receptacles for fixing bolts, clamping bolts or fastening screws, by means of which variable fixing to the brackets is enabled, characterized in that a receptacle is formed centrally in the area of ​​a rotation axis and further receptacles are formed adjacent to it, wherein the receptacles can optionally be used to adjust the angle of inclination.

Description

[0001] The invention relates to an air guide grille according to the preamble of claim 1.

[0002] These types of air guide grilles are used, for example, to direct airflow in cleanroom climate control systems. Conventional designs feature numerous louvers, the ends of which are held in slots within a frame. The louvers are arranged at a specific angle designed for optimal airflow.

[0003] A disadvantage of this solution is that the angle of attack is not variable. Changing the angle of attack requires a complex modification of the frame. Furthermore, the airflow through the flat louver structure is not optimal.

[0004] The general state of the art is known from US 4 545 294 A and DE 689 03 920 T2.

[0005] In contrast, the invention is based on the objective of creating an air guide grille that can be easily adapted to different flow conditions.

[0006] This problem is solved by an air guide grille with the feature of claim 1.

[0007] According to the invention, the air guide grille has lateral brackets on which a plurality of spaced-apart louvers are held at a predetermined angle of attack. The louvers are provided with several fastening elements on their end faces facing the brackets, allowing for variable positioning on the brackets. These fastening elements have receptacles for fixing bolts / tension bolts / fastening screws or other fixing devices that are inserted on the bracket side. Adjusting the angle of attack is particularly easy if each louver's end face has a receptacle centrally located in the area of ​​a pivot axis and further receptacles adjacent to it. Depending on the choice of receptacle, the angle of attack can then be adjusted. If only the central receptacle is used, the angle of attack can also be changed after installation.Depending on the choice of fastening means, the angle of the louvers within the brackets can be changed, so that the angle of the louvers can also be individually adjusted within a ventilation grille.

[0008] It is particularly preferred if these connections are designed as threaded holes. Of course, a material-bonded connection, for example by gluing or soldering, is also possible.

[0009] The construction of the console is particularly simple if it has two console plates / bracket sheets to which the slats are attached with their end faces.

[0010] Each bracket plate can have a hole pattern designed for the optional placement of bracket-side fixing devices.

[0011] For particularly high requirements regarding the positioning of the slats, fixing plates, especially fixing sheets, can be provided in which precisely fitting recesses for end sections of the slats are formed and which are then attached to the brackets to fix the slats.

[0012] The flow guidance is optimal when the lamellae are curved.

[0013] Preferred embodiments of the invention are explained in more detail below with reference to schematic drawings. These show: Fig. 1. A schematic representation of a conventional air guide grille; Fig. 2 a corresponding representation of an air guide grille according to the invention; Fig. 3 a single representation of a lamella of an air guide grille according to the invention; Fig. 4 an embodiment with a fixing plate for fixing the angle of attack of the slats; Fig. 5 a detailed representation, in which fixing bolts are inserted into the lamellae and Fig. 6 a detailed representation of the exemplary embodiment according to Fig. 2.

[0014] Fig. Figure 1 shows a simplified three-dimensional representation of a conventional ventilation grille. This grille has a frame with two side plates connected by two crossbars. Louvers extend between the two side plates, each inserted into angled slots in the side plates. The louvers are flat, and correspondingly straight grooves are provided to accommodate the end sections of the louvers.

[0015] Changing the angle of attack of the slats in such a concept is only possible through complex modifications to the side plates.

[0016] Fig. Figure 2 shows a corresponding representation of an air guide grille according to the invention. In this grille, the louvers are not held in a frame, but rather on two spaced-apart brackets, which are preferably connected to each other only via the louvers. Crossbeams or the like can be provided for further stiffening – however, these are not necessarily required.

[0017] As can be seen from the individual presentation according to Fig. As shown in Figure 3, the lamellae are not flat but curved, significantly improving airflow compared to conventional solutions. Another difference is that the lamellae are, for example, made of continuously cast profiles, with the following features: Fig. The end faces of the louvers, as shown in Figure 3, feature a multitude of recesses. In this specific embodiment, one of these recesses is located centrally, approximately at the apex of the bulge, and two further recesses are formed on the lateral longitudinal edges. These longitudinal edges are rounded to further improve airflow. The louvers are designed with a hollow profile, minimizing the weight of the ventilation grille.

[0018] The receptacles can be designed, for example, as threaded holes or as receptacles for threaded bushings or the like.

[0019] In one embodiment, the consoles are arranged according to Fig. 4. Designed with an internal fixing plate in which a multitude of recesses, shaped according to the curvature of the slats, are arranged, into which the end sections of the slats are inserted and thus precisely fixed in position. This fixing plate is used individually depending on the desired adjustment angle.

[0020] Fig. Figure 5 shows a ventilation grille according to the invention without a mounting plate. This illustration shows that threaded bushings / fixing bolts are inserted into the two outer receptacles of the louvers. These can be connected to the louvers by a material bond, an interference fit, or via a thread.

[0021] According to the representations in Fig. 2 and in Fig.6. Bracket plates are then attached to the outside of the slats or, if necessary, to the fixing plates. These bracket plates have a hole pattern that allows the slats to be mounted at a predetermined angle. This hole pattern (not shown) can be designed such that a recess corresponding to the central slat receptacle is provided, allowing the slats to pivot freely on the bracket plate. In the illustrated embodiment, the bracket plate is individually designed with respect to the angle of inclination, so that only two recesses are provided for the fixing bolt / screw or the like, which engage in the outer receptacles of the slat. As mentioned, by selecting an appropriate hole pattern, the bracket plate can also be designed to accommodate slats at different angles of inclination.This makes it possible, for example, to vary the angle of attack within a ventilation grille as desired.

[0022] As mentioned, the positional fixation of the lamella and thus the connection of the brackets to the lamellas can be achieved using suitable fastening means, for example fixing bolts, fixing screws, tension bolts or the like.

[0023] The manufacture of the consoles according to the invention is significantly simpler than with conventional solutions, which require a frame structure on the one hand and require slots for fixing the slats in position, which are difficult to produce.

[0024] This is a modular louver system for the customized design of air distribution grilles, particularly, but not exclusively, for cleanroom applications. Its unique feature is that the slightly curved / angled shape of the louvers ensures optimal ventilation with a uniform airflow. The louvers are individually, partially, or all adjustable, allowing for individual adjustment of their angle of attack. The mounting system is designed so that the louvers can be individually secured with clamping bolts, or the rotating louver wings can be individually screwed in place. This screw connection simultaneously fastens the mounting plate to the outer mounting plate (both laser-cut, for example), forming the frame, which is then finished at the end with a welded-on sheet metal section.The fixing plate is only needed for firmly securing the slats (it is not rotatable). The screws / fasteners can be attached at various points on the slats, allowing the pivot point and therefore the angle of attack to be individually adjusted.

[0025] Revealbart is an air guide grille with a multitude of louvers, the angle of which is individually adjustable.

Claims

[1] Air guide grilles, especially for use in cleanrooms, with lateral brackets on which a plurality of spaced-apart louvers are held at a predetermined angle of inclination, wherein the louvers have several fastening means on their end faces facing the brackets, which fastening means are receptacles for fixing bolts, clamping bolts or fastening screws, by means of which variable fixing on the brackets is made possible, characterized by , that a receptacle is formed centrally in the area of ​​a rotation axis and further receptacles are formed adjacent to it, whereby the receptacles can optionally be used to adjust the angle of attack. [2] Air guide grille according to claim 1, wherein the receptacles are threaded bushings or threaded bores. [3] Air guide grille according to claim 1 or 2, wherein the brackets each have a bracket plate, in particular a bracket sheet, to which the louvers are fixed with their end faces. [4] Air guide grille according to claim 3, wherein a hole pattern for receiving frame-side fixing means is formed in the console plate. [5] Air guide grille according to one of the preceding claims, with at least one fixing plate, in particular a fixing plate, in which recesses are provided according to the profile and angle of inclination of the louvers, wherein the fixing plate is held on the associated console for fixing the position of the louvers. [6] Air guide grille according to one of the preceding claims, wherein the louvers are curved.

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