Adjustable louvers for electromagnetic compatibility testing

Abstract

The utility model relates to an adjustable ventilation window for electromagnetic compatibility test belongs to the technical field of electromagnetic compatibility test, it adopts the net board body of circular, the body is by multiple group sector region constitutes, including big aperture vent area and small aperture vent area, through the shielded plate of central pivot linkage symmetry, can select the big hole or small hole area when rotating, realizes the dynamic regulation of shielding effectiveness and ventilation efficiency, the utility model discloses compact overall structure, easy operation makes the ventilation volume and shielding effectiveness adjustable.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic compatibility testing technology, and in particular to an adjustable ventilation window for electromagnetic compatibility testing. Background Technology

[0002] With the development of electromagnetic compatibility (EMC) technology, ventilation window technology has emerged. This technology reflects most of the incident electromagnetic waves through the metal plate of the ventilation window, and the electromagnetic waves are diffracted when they pass through the small holes on the ventilation window, and the energy is partially dissipated.

[0003] In related technologies, traditional ventilation windows attenuate electromagnetic interference by setting specific aperture sizes; this design method with fixed geometric parameters ensures basic shielding effectiveness and has a high degree of technological maturity.

[0004] However, the aforementioned fixed structure has significant limitations: since the aperture parameters are physically fixed during the manufacturing stage, the device cannot control the shielding effectiveness and ventilation volume through parameter adjustment, which restricts its adaptability to complex electromagnetic environments. Utility Model Content

[0005] In response to the shortcomings of the existing production technology, the applicant provides an adjustable ventilation window for electromagnetic compatibility testing, which enables adjustable ventilation efficiency and shielding effectiveness.

[0006] The technical solution adopted in this utility model is as follows:

[0007] An adjustable ventilation window for electromagnetic compatibility testing includes:

[0008] window frame;

[0009] The mesh panel body installed within the window frame; and

[0010] A shielding selection component configured on the surface of the mesh panel body;

[0011] The mesh panel body is formed by four fan-shaped regions with the same cross-section joined together in a circular shape to form a circular structure, including a first region, a second region, a third region, and a fourth region;

[0012] The first and third regions have multiple first ventilation holes, and the second and fourth regions have multiple second ventilation holes, wherein the diameter of the first ventilation holes is larger than that of the second ventilation holes.

[0013] The mesh panel body has a through hole at its center, and the shielding selection component passes through the through hole;

[0014] The shielding selection component can be used to cover and shield the first and third regions, or the shielding selection component can be used to cover and shield the second and fourth regions.

[0015] As a further improvement to the above technical solution:

[0016] In one embodiment, the shielding selection component includes a rotating shaft, a first shielding selection plate, and a second shielding selection plate; the rotating shaft is rotatably disposed through the through hole, and a mounting portion is connected to one end of the rotating shaft passing through the through hole; the first shielding selection plate and the second shielding selection plate are symmetrically arranged on both sides of the rotating shaft, and their cross-sectional shapes match the fan-shaped region.

[0017] In one embodiment, the first shielding selection plate and the second shielding selection plate are symmetrical about the center of the rotation axis; when the first shielding selection plate covers the first area, the second shielding selection plate simultaneously covers the third area; when the first shielding selection plate covers the second area, the second shielding selection plate simultaneously covers the fourth area.

[0018] In one embodiment, the curvature of the first shielding selection plate and the second shielding selection plate is consistent with the fan-shaped curvature of the corresponding region.

[0019] In one embodiment, both the first ventilation hole and the second ventilation hole are through-holes that penetrate the area, and the inner wall of each hole is coated with a wave-absorbing coating.

[0020] In one embodiment, the four sector regions have equal areas and are joined together without gaps between adjacent regions.

[0021] In one embodiment, the via is a circular through hole with a diameter larger than that of the rotating shaft and a clearance fit.

[0022] In one embodiment, the window frame is a metal shielding frame with an inner edge having an assembly groove that matches the outer contour of the mesh panel body.

[0023] The beneficial effects of this utility model are as follows:

[0024] This invention features a compact structure and allows for switching between areas covered by different apertures via a rotating shielding selection component. In large aperture mode, the small aperture area is covered while the large aperture area is exposed, increasing ventilation volume but reducing shielding effectiveness, making it suitable for low electromagnetic interference scenarios. In small aperture mode, the large aperture area is covered while the small aperture area is exposed, enhancing shielding effectiveness but reducing ventilation volume, making it suitable for high electromagnetic interference scenarios. This invention overcomes the limitations of traditional fixed ventilation windows, achieving adjustable ventilation volume and shielding effectiveness.

[0025] This utility model also has the following advantages:

[0026] (1) This utility model is composed of four equal-area sector areas to form a circular body, which has a symmetrical and compact structure and high space utilization. The rotating shaft drives the symmetrically arranged first and second shielding plates to simultaneously cover the first and third areas or the second and fourth areas. The state can be switched with a single rotation. The operation is simple and reliable and there is no complicated transmission mechanism.

[0027] (2) This utility model actively attenuates electromagnetic waves by adding a wave-absorbing coating to the inner wall of the ventilation hole. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0029] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective.

[0030] Figure 3 for Figure 1 A schematic diagram of the structure after the selected component is hidden.

[0031] Figure 4 This is a schematic diagram of the shielding selection component of this utility model.

[0032] Figure 5 This is a schematic diagram of the structure of the microwave absorbing coating inside the ventilation hole of this utility model.

[0033] Among them: 100, window frame; 200, mesh panel body; 300, shielding selection component; 400, microwave absorbing coating;

[0034] 210, First Zone; 220, Second Zone; 230, Third Zone; 240, Fourth Zone; 250, First Ventilation Hole; 260, Second Ventilation Hole; 270, Through Hole;

[0035] 310, Rotating shaft; 320, First shielding selection plate; 330, Second shielding selection plate; 340, Mounting part. Detailed Implementation

[0036] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0037] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0039] When using the terms “including,” “having,” and “comprising” as described herein, another component may be added unless explicitly qualifying terms such as “only,” “consisting of,” etc. are used. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0040] It should be understood that although the terms "first," "second," etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0041] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the components are shown in the drawings only as examples and not necessarily to actual scale.

[0042] like Figures 1-5 The accompanying drawing shows a structural schematic diagram of an adjustable ventilation window for electromagnetic compatibility testing according to an embodiment of the present invention; for ease of description, the drawing only shows the structure related to the embodiment of the present invention.

[0043] This application provides an adjustable ventilation window for electromagnetic compatibility testing, comprising:

[0044] The window frame 100 is a metal shielding frame with an inner edge provided with an assembly groove (not shown in the figure) for fixing the mesh panel body 200.

[0045] The mesh panel body 200 is installed inside the window frame 100 and is a circular structure formed by seamless splicing of four fan-shaped areas with the same cross section, including the first area 210, the second area 220, the third area 230 and the fourth area 240.

[0046] The shielding selection component 300 is configured on the outer surface of the mesh plate body 200 and can be rotated to select and cover different areas.

[0047] A microwave-absorbing coating 400 is applied to the inner wall of the ventilation hole.

[0048] In some embodiments, the mesh panel body 200 includes four fan-shaped regions with equal areas and a central angle of 90°; wherein, the first region 210 and the third region 230 are symmetrically distributed and each is provided with a plurality of first ventilation holes 250, the second region 220 and the fourth region 240 are symmetrically distributed and each is provided with a plurality of second ventilation holes 260, and the diameter of the first ventilation hole 250 is larger than that of the second ventilation hole 260, both of which are through straight channels;

[0049] Furthermore, such as Figure 3 As shown, it also includes a through hole 270, which is located at the center of the mesh body 200. The through hole 270 is a circular through hole.

[0050] In some embodiments, the inner walls of all ventilation holes are covered by a microwave absorbing coating 400; for example, the microwave absorbing coating 400 may be composed of iron-silicon-aluminum soft magnetic alloy powder and epoxy resin, used to actively attenuate electromagnetic waves and suppress cavity resonance.

[0051] In some embodiments, such as Figure 4 As shown, the shielding selection component 300 includes:

[0052] The rotating shaft 310 is rotatably inserted into the through hole 270 and is clearance-fitted with the through hole 270. The diameter of the through hole 270 is larger than that of the rotating shaft 310.

[0053] The first shielding selection plate 320 and the second shielding selection plate 330 are symmetrically fixed on both sides of the rotating shaft 310, and their curvature is perfectly matched with the fan-shaped area.

[0054] Mounting part 340 connects to one end of rotating shaft 310 that passes through through hole 270 for external drive.

[0055] In practical applications, the working states of this utility model include:

[0056] In the first mode, the rotating shaft 310 is rotated so that the first shielding selection plate 320 covers the second area 220 and the second shielding selection plate 330 simultaneously covers the fourth area 240. At this time, the first ventilation hole 250 is exposed, which is a large-diameter exposure, increasing the ventilation volume and reducing the shielding effectiveness.

[0057] In the second mode, the rotating shaft 310 is rotated so that the first shielding selection plate 320 covers the first area 210 and the second shielding selection plate 330 simultaneously covers the third area 230. At this time, the second ventilation hole 260 is exposed, which is a small-diameter exposure, thus enhancing the shielding effectiveness and reducing the ventilation volume.

[0058] In summary, the present invention has a reasonable structure. By rotating the shielding selection component 300, the ventilation efficiency and shielding effectiveness can be adjusted. In addition, the symmetrical layout of the four fan-shaped areas and the linkage shielding plate design make the operation simple by rotating the shaft 310 in one step. Finally, the present application also adds a wave-absorbing coating 400 to the inner wall of the ventilation hole to actively attenuate electromagnetic waves.

[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The embodiments described above merely illustrate the implementation of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An adjustable louvre for electromagnetic compatibility testing, characterised in that, include: Window frame (100); The mesh panel body (200) is installed inside the window frame (100). as well as A shielding selection component (300) is configured on the outer surface of the mesh body (200); The mesh panel body (200) is formed by four fan-shaped regions with the same cross-section joined together in a circular shape to form a circular structure, including a first region (210), a second region (220), a third region (230) and a fourth region (240). The first region (210) and the third region (230) have multiple first ventilation holes (250), and the second region (220) and the fourth region (240) have multiple second ventilation holes (260), and the diameter of the first ventilation hole (250) is larger than that of the second ventilation hole (260). The mesh panel body (200) has a through hole (270) at its center, and the shielding selection component (300) passes through the through hole (270); The first region (210) and the third region (230) are covered by the shielding selection component (300), or the second region (220) and the fourth region (240) are covered by the shielding selection component (300).

2. The adjustable ventilation window for electromagnetic compatibility testing according to claim 1, characterized in that, The shielding selection component (300) includes a rotating shaft (310), a first shielding selection plate (320), and a second shielding selection plate (330). The rotating shaft (310) is rotatably inserted through the through hole (270), and a mounting part (340) is connected to one end of the rotating shaft (310) that passes through the through hole (270). The first shielding selection plate (320) and the second shielding selection plate (330) are symmetrically arranged on both sides of the rotating shaft (310), and their cross-sectional shape matches the fan-shaped area.

3. The adjustable ventilation window for electromagnetic compatibility testing according to claim 2, characterized in that, The first shielding selection plate (320) and the second shielding selection plate (330) are symmetrical about the center of the rotating shaft (310); When the first shielding selection plate (320) covers the first area (210), the second shielding selection plate (330) simultaneously covers the third area (230). When the first shielding selection plate (320) covers the second region (220), the second shielding selection plate (330) simultaneously covers the fourth region (240).

4. The adjustable ventilation window for electromagnetic compatibility testing according to claim 2, characterized in that, The curvature of the first shielding selection plate (320) and the second shielding selection plate (330) is consistent with the fan-shaped curvature of the corresponding area.

5. The adjustable ventilation window for electromagnetic compatibility testing according to claim 1, characterized in that, The first ventilation hole (250) and the second ventilation hole (260) are both through-holes that penetrate the area, and the inner wall of each hole is coated with a wave-absorbing coating (400).

6. The adjustable ventilation window for electromagnetic compatibility testing according to claim 1, characterized in that, The four sector regions have equal areas and are joined together without gaps between adjacent regions.

7. The adjustable ventilation window for electromagnetic compatibility testing according to claim 2, characterized in that, The through hole (270) is a circular through hole with a diameter larger than that of the rotating shaft (310) and a clearance fit.

8. The adjustable ventilation window for electromagnetic compatibility testing according to claim 1, characterized in that, The window frame (100) is a metal shielding frame, and its inner edge is provided with an assembly groove that matches the outer contour of the mesh panel body (200).

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