UA75186C2 - Planar panel with ventilating slots - Google Patents

Abstract

A planar component (2) containing vents for the supply of cooling air, which is particularly suitable as the wall of a door or housing for switch cabinets or the control panels of switching systems. The component (2) contains web-type elements (3) which are produced by deformation and which are offset in relation to the plane of the component (2) in order to form said vent, said elements respectively forming an open slit (4; 5) on both sides in the longitudinal direction thereof. The deformation or stamping is carried out in such a way that it is impossible for foreign bodies having dimensions of l web-type elements more than 1mm to pass through.

Description

Description of the invention

The invention relates to a planar part made in the form of a door or a wall element of a switching cabinet 2 or a chamber of an electrical distribution device equipped with heat-dissipating equipment, with several parallel slit-like ventilation openings for the supply of cooling air with such a selection of sizes that foreign bodies cannot penetrate into them mm and more.

The detail of the named type is known from OE 4339383 A1. It explains in detail the difficulties of combining a sufficient cooling effect with high requirements for protection against the penetration of foreign bodies in accordance with the 70th degree of IRA protection (or now IRA4X). Based on the earlier solution of placing a wire mesh under the ventilation holes, it describes the installation of a protective part made of extruded plastic behind the ventilation slots. This device is based on the fact that ventilation holes in steel sheets of a thickness suitable for switchgear can be economically manufactured only up to the degree of protection 1РХХ. Starting with a material thickness of more than 1.5 mm, conventional processing methods, such as stamping, for such a degree of protection as IR4X, with holes less than 1 mm, are too complex from a technological point of view.

The task of the invention, based on the part according to OE 4339383 At, consists in the development of a part with slit-like ventilation holes for the supply of cooling air, which can be manufactured with low technological costs and low material consumption, but at the same time fully satisfies the technical requirements, namely the requirements sufficient ventilation and protection from foreign objects measuring mm or more.

According to the invention, this problem is solved due to the fact that the slit-like ventilation holes are formed by deformation-made jumpers protruding from the plane of the part no more than mm, forming in their longitudinal direction on both sides one slit hole. Deformation in this context refers to all suitable form-forming processing methods, for example, in the case of steel sheet c 22, there are known methods of extrusion with embossing, and in the case of plastics, processing by injection molding or, Go) starting from flat plastic plates, extrusion and kneading with or without heat.

It is essential for the invention that the pressed jumpers, raised above the plane of the sheet, despite the small distance relative to the plane of the part, together form a sufficient ventilation channel. At the same time, the number of ee, jumpers and thus the number of ventilation slots depends on the requirements of the need for cooling air. with

Therefore, it is expedient to combine several jumpers into a group of jumpers and perform, depending on the necessary need for cooling air, several groups of jumpers in a suitable configuration next to each other and one above the other. Placement of several groups of jumpers in one linear row turned out to be advantageous.

If the width of the jumpers and the distance between the jumpers are chosen as small as possible from a technological point of view, a ratio between the total cross-sectional area of the ventilation openings and the total area of the part of about 5090 can be achieved.

Both horizontal and vertical orientation of jumpers and thus ventilation slits is possible. "

Thanks to the solution according to the invention, solid parts are obtained, which are used as doors or walls of the housing, with 50 degrees of protection of IRHA (protection against foreign bodies with dimensions equal to or greater than mm) and which, unlike ventilation holes with a wire mesh, cannot be pierced with a sharp object. But

With" the same large passage area is achieved, as in the case of a wire mesh.

From CE 3214823 A1, it is already known in the case of ventilation grills for instrument housings intended for the placement of electronic modules, the pressing of strips limited by slits from the plate parallel to the plane of the plate. These ventilation slits are inserted into the plate equipped with ribs in such a way that the ribs and the ventilation slits alternate with each other. Strips or jumpers are raised relative to the plane of the plate by 4 mm. 4! Due to this, the well-known ventilation grid is clearly not suitable for switching cabinets and distribution devices of power equipment, because it does not provide protection against the penetration of foreign bodies with dimensions starting from - 1 mm. 20 The invention for better understanding is explained below in more detail with the help of a preferred embodiment, which does not limit the scope of protection. The figures show: Fig. 1 a group of jumpers according to the invention in detail, applicable as a door or case walls;

Fig. 2 jumper according to the invention in a section along the line II-II in Fig. 1;

Fig. 3 is the first possible form of arrangement of the arrangement of jumper groups according to the invention in the part 22 applicable as a door or case walls;

GF) Fig. 4 is another possible form of arrangement of the arrangement of jumper groups according to the invention in a part applicable as a door or case walls. o Fig. 1 shows a group 1 of jumpers according to the invention in detail 2, which can be used as doors or walls of the case of a switching cabinet or a switchgear chamber. Jumpers From group 1 jumpers are obtained 60 by local deformation of part 2 by embossing in such a way that one open gap 4 is formed on both sides in the longitudinal direction; 5. At the same time, the width B of the jumper Z and the distance A between the jumpers are chosen as small as is technologically possible. Due to this, the ratio between the total cross-sectional area of the ventilation holes and the used area of the part 2 (door or case wall) can be reached of about 50905. Because Fig. 2 shows an image of the jumper according to the invention in a cross-section along line I-Y in Fig. 1.

The bridge Z is pressed (extruded) from part 2 to the height H. This height H, which determines the size of the ventilation hole, on both sides of the bridge Z is set by the height of the deformation minus the thickness O of the material.

Fig. 3 presents the first possible form of arrangement of groups 1 of jumpers according to the invention in detail 2. The number of groups 1 of jumpers depends on the required air demand. In this example, there are a total of twelve groups of 1 jumpers - four groups of 1 jumpers next to each other and three groups of 1 jumpers one above the other. At the same time, jumpers C are oriented horizontally.

Fig. 4 presents another possible form 7 of performing the location of the jumper groups according to the invention in detail 2. Also here, the number of jumper groups 1 is determined by the necessary need for cooling air. /o Also, in this example, a total of twelve groups of 1 jumpers are made in this arrangement - four groups of 1 jumpers next to each other and three groups of 1 jumpers one above the other. Jumpers C are oriented, however, vertically.

The advantages of the corresponding inventive solution, in addition to a technologically simple design that saves material, are primarily that this type of manufacturing is not limited, as in stamping, by the thickness of the material and that it does not require any additional parts. In addition, direct piercing of the part at a right angle is not possible, since the intervention carried out in this direction, for example, by an electric arc or a tool, or by a foreign body, is effectively reflected by the jumpers.

Claims (1)

The formula of the invention 1. A flat part (2) made in the form of a door or a wall equipped with heat-releasing equipment of a switching cabinet or a chamber of an electrical distribution device with a certain number of parallel slit-like ventilation holes for supplying cooling air with such a selection of sizes that foreign objects cannot penetrate into them bodies, with dimensions of 1 mm or more, which is characterized by the fact that the slit-like ventilation openings are formed by deformation, protruding from the plane of the part (2) by no more than 1 mm, partitions (3) forming in their longitudinal direction slit-like openings on both sides. 2. The detail according to point 1, which differs in that to ensure the need for cooling air, a certain number of jumpers (3) is located in the group (1) of jumpers. 3. Detail according to point 2, which differs in that several groups (1) of jumpers are provided next to each other /--00 and one above the other. "- 4. A detail according to any of items 2 or 3, which is characterized by the fact that several groups (1) of jumpers are located in a linear row. is) 5. A part according to any of the previous points, which differs in that the total area of the ventilation holes is about 50 95 of the total area of the part (2). b. A detail according to any of the previous items, which differs in that the partitions (3) are oriented horizontally. 7. A detail according to any of the previous items, which differs in that the partitions (3) are oriented vertically. 40. September - . and? -i 1 - (ee) 4) ime) 60 b5