CN107816301B - Electromagnetic shielding waveguide ventilation window - Google Patents
Electromagnetic shielding waveguide ventilation window Download PDFInfo
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- CN107816301B CN107816301B CN201711004850.9A CN201711004850A CN107816301B CN 107816301 B CN107816301 B CN 107816301B CN 201711004850 A CN201711004850 A CN 201711004850A CN 107816301 B CN107816301 B CN 107816301B
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- honeycomb
- end surface
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- electromagnetic shielding
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
- E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B7/00—Special arrangements or measures in connection with doors or windows
- E06B7/02—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
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- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Waveguides (AREA)
Abstract
The invention provides an electromagnetic shielding waveguide ventilation window, and belongs to the technical field of electromagnetic interference resistance. The electromagnetically shielded waveguide louver comprises a plurality of plies. The lamina comprises a bearing part and a honeycomb part arranged at the center of the bearing part, and a plurality of honeycomb holes are arranged on the honeycomb part. All the layers are arranged from bottom to top in sequence, all the bearing parts are stacked to form an edge outer frame, and all the honeycomb parts are stacked to form a central honeycomb body. After all the layer sheets are stacked and connected, the bearing parts of all the layer sheets form an edge outer frame, the honeycomb parts of all the layer sheets form a central honeycomb body, and the central honeycomb body has good structural stability, is not easy to damage and has strong high-temperature resistance.
Description
Technical Field
The invention relates to the technical field of anti-electromagnetic interference, in particular to an electromagnetic shielding waveguide ventilation window.
Background
The electromagnetic shielding waveguide ventilation window is a multifunctional product meeting the overall requirements of electromagnetic shielding, ventilation, mechanical performance and the like, is widely applied to various electronic equipment needing high-shielding-efficiency electromagnetic shielding, and solves the problem of mutual contradiction between ventilation and shielding by utilizing a cut-off waveguide principle, namely the electromagnetic shielding problem and the heat dissipation problem.
The structure of the existing electromagnetic shielding waveguide ventilation window consists of two parts, namely a central honeycomb body and an edge outer frame, wherein the central honeycomb body is connected with the edge outer frame in a mechanical connection mode. The central honeycomb body is made of a plurality of thin plates with corrugated structures in a gluing mode, and low-melting-point glue is introduced, so that the central honeycomb body is poor in high-temperature resistance and low in strength, and the electromagnetic shielding waveguide ventilation window cannot be used under a high-temperature condition.
Disclosure of Invention
The invention aims to provide an electromagnetic shielding waveguide ventilation window to solve the problems of poor high-temperature resistance and low strength of the electromagnetic shielding waveguide ventilation window.
The invention aims to provide a processing method of an electromagnetic shielding waveguide ventilating window, which aims to solve the problems of poor high-temperature resistance and low strength of the electromagnetic shielding waveguide ventilating window.
The invention is realized by the following steps:
in view of the above first object, the present invention provides an electromagnetically shielded waveguide louver comprising a plurality of lamellae;
the laminated sheet comprises a bearing part and a honeycomb part arranged at the center of the bearing part, and a plurality of honeycomb holes are arranged on the honeycomb part;
all the layers are arranged from bottom to top in sequence, all the bearing parts are stacked to form an edge outer frame, and all the honeycomb parts are stacked to form a central honeycomb body.
Furthermore, two ends in the thickness direction of the bearing part are provided with a first end face and a second end face, two ends in the thickness direction of the honeycomb part are provided with a third end face and a fourth end face, the third end face protrudes outwards relative to the first end face to form a convex part, the fourth end face is inwards concave relative to the second end face to form a concave part, and the outer contour of the convex part is matched with the inner contour of the concave part.
Further, the convex part and the concave part are both circular.
Further, the distance between the third end surface and the first end surface is a first distance, the distance between the fourth end surface and the second end surface is a second distance, and the first distance is equal to the second distance.
Furthermore, the bearing parts are provided with limiting holes, and the corresponding limiting holes on all the bearing parts are aligned to form limiting channels;
the electromagnetic shielding waveguide ventilation window further comprises a limiting piece, and the limiting piece is inserted into the limiting channel.
Furthermore, the outer side wall of the bearing part is provided with a bulge protruding outwards, and the limiting hole is formed in the bulge.
Further, two adjacent layers are connected by welding.
Further, the bearing part and the honeycomb part are of an integrated structure.
Further, the honeycomb holes are regular hexagons.
Based on the second object, the invention provides a processing method of an electromagnetic shielding waveguide ventilation window, which comprises the following steps:
processing of the laminated sheets: processing the shape and the hole of each layer sheet to form a plurality of honeycomb holes on the layer sheet;
assembling: stacking and positioning all the layers in sequence from bottom to top;
welding: all the plies after stacking and positioning are diffusion welded together.
The invention has the beneficial effects that:
the invention provides an electromagnetic shielding waveguide ventilation window which is formed by sequentially stacking and connecting a plurality of laminas from bottom to top. After all the layer sheets are stacked and connected, the bearing parts of all the layer sheets form an edge outer frame, the honeycomb parts of all the layer sheets form a central honeycomb body, and the central honeycomb body has good structural stability, high strength, difficult damage and strong high temperature resistance. In addition, the center honeycomb body has good integrity and robustness with respect to the edge frame.
The invention provides a method for processing an electromagnetic shielding waveguide ventilating window, which comprises the steps of firstly processing honeycomb holes on each layer sheet, then stacking and welding the layer sheets together, thereby obtaining the firmer electromagnetic shielding waveguide ventilating window. The roughness of the ventilation surface can reach 0.2 micron by the processing method, and the resistance of the fluid when flowing through can be effectively reduced; the central honeycomb body can be a common honeycomb structure, other polygonal or irregular structures, or a transition shape or random porous structure with non-uniform size by the processing method, so that the design possibility of the electromagnetic shielding wave ventilation window is released; the electromagnetic shielding waveguide ventilation window obtained by the processing method has beautiful appearance; the surface flatness and the finish degree are good, the installation bases such as a case are attached more tightly, the electromagnetic leakage rate is higher, in addition, the minimum diameter of the honeycomb holes of the electromagnetic shielding waveguide ventilating window can reach 0.5mm, a fine shielding structure is enabled to be possible, and meanwhile, the structural rigidity of the fine shielding structure is effectively improved due to the small-diameter hole diameter.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of an electromagnetic shielding conductive louver in the prior art;
FIG. 2 is a corrugated structure diagram of the central honeycomb body shown in FIG. 1;
fig. 3 is a schematic structural view of an electromagnetically shielded waveguide louver according to embodiment 1 of the present invention;
FIG. 4 is a schematic view of the construction of the ply shown in FIG. 3;
fig. 5 is a cross-sectional view of the ply shown in fig. 3.
Icon: 100-electromagnetic shielding waveguide ventilation windows; 10-edge frame; 20-a central honeycomb body; 21-corrugated structure; 30-ply; 31-a carrier; 311-a first end face; 312-a second end face; 313-a protrusion; 314-a limiting hole; 32-a honeycomb portion; 321-honeycomb holes; 322-a third end face; 323-a fourth end face; 33-a projection; 34-a recess; 40-a stop.
Detailed Description
In the prior art, as shown in fig. 1, an electromagnetic shielding conductive window is composed of two parts, namely, an edge frame and a central honeycomb body 20 disposed at the center of the edge frame 10, and the central honeycomb body 20 is connected with the edge frame 10 by means of a snap. The central honeycomb body 20 includes a plurality of corrugated structures 21, the corrugated structures 21 being shown in fig. 2. All the corrugated structures 21 are joined together by means of gluing to obtain the central honeycomb body 20. Because the central honeycomb body 20 is introduced with the glue with low melting point, the central honeycomb body 20 has poor high temperature resistance, and the electromagnetic shielding waveguide ventilation window 100 can not be used under the high temperature condition.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that the indication of the orientation or the positional relationship is based on the orientation or the positional relationship shown in the drawings, or the orientation or the positional relationship which is usually placed when the product of the present invention is used, or the orientation or the positional relationship which is usually understood by those skilled in the art, or the orientation or the positional relationship which is usually placed when the product of the present invention is used, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, cannot be understood as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be further noted that the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
As shown in fig. 3, the present embodiment provides an electromagnetic shielding waveguide ventilation window 100, which includes a limiting member 40 and a plurality of lamellae 30, all lamellae 30 are sequentially disposed and connected from bottom to top, and the lamellae 30 are positioned by the limiting member 40.
The layer sheet 30 is made of metal, such as aluminum alloy, copper alloy, titanium alloy, stainless steel, high temperature alloy, high temperature tungsten, high temperature niobium, high temperature molybdenum, and the like. In this embodiment, as shown in fig. 4, the layer sheet 30 has a circular structure, the layer sheet 30 includes a bearing portion 31 and a honeycomb portion 32 located at a bearing center position, the bearing portion 31 and the honeycomb portion 32 have an integrated structure, the bearing portion 31 has a solid structure, the honeycomb portion 32 has a honeycomb structure, the honeycomb portion 32 is provided with a plurality of honeycomb holes 321, and the honeycomb holes 321 are regular hexagons.
As shown in fig. 5, the carrier part 31 is located in an edge region of the ply 30, the carrier part 31 is annular, the carrier part 31 has a first end face 311 and a second end face 312, and the first end face 311 and the second end face 312 are end faces at both ends of the carrier part 31 in the thickness direction. The first end surface 311 and the second end surface 312 are both flat surfaces, and the first end surface 311 is parallel to the second end surface 312. The outer side wall of the bearing part 31 is provided with a protrusion 313 protruding outwards, and the protrusion 313 extends along the radial direction of the bearing part 31. The number of the protruding portions 33 may be one, two or more, in this embodiment, three protruding portions 33 are provided, and three protruding portions 33 are circumferentially distributed on the outer circumferential wall of the bearing portion 31 at intervals. The protruding portion 33 is provided with a limiting hole 314, and the axis of the limiting hole 314 is parallel to the axis of the bearing portion 31.
The honeycomb portion 32 is circular, the diameter of the honeycomb portion 32 is equal to the inner diameter of the carrier portion 31, the honeycomb portion 32 has a third end surface 322 and a fourth end surface 323, and the third end surface 322 and the fourth end surface 323 are end surfaces at both ends in the thickness direction of the honeycomb portion 32. The third end surface 322 and the fourth end surface 323 are both flat surfaces, the third end surface 322 is parallel to the fourth end surface 323, and two ends of the honeycomb holes 321 penetrate through the third end surface 322 and the fourth end surface 323 respectively.
The third end surface 322 is close to the first end surface 311, the third end surface 322 protrudes outward relative to the first end surface 311 to form a protruding portion 33, the protruding portion 33 is circular, the fourth end surface 323 is close to the second end surface 312, the fourth end surface 323 protrudes inward relative to the second end surface 312 to form a recessed portion 34, and the recessed portion 34 is circular. The outer contour of the projection 33 matches the inner contour of the recess 34, i.e. the diameter of the projection 33 matches the inner diameter of the recess 34. The distance between the third end surface 322 and the first end surface 311 is a first distance, the distance between the fourth end surface 323 and the second end surface 312 is a second distance, and the first distance is equal to the second distance.
In this embodiment, the limiting member 40 is a pin, and the diameter of the pin is matched with the aperture of the limiting hole 314.
As shown in fig. 3, when assembling, all the layers 30 are arranged from bottom to top, in two adjacent layers 30, the convex portion 33 of the layer 30 at the upper side is inserted into the concave portion 34 of the layer 30 at the lower side, the load bearing portions 31 of all the layers 30 are stacked together, and the honeycomb portions 32 of all the layers 30 are stacked together. The corresponding limiting holes 314 on all the bearing parts 31 are aligned to form a limiting channel, and the limiting member 40 is inserted into the limiting channel. The first end surface 311 of the upper layer sheet 30 and the second end surface 312 of the lower layer sheet 30 are connected by welding, and the third end surface 322 of the upper layer sheet 30 and the fourth end surface 323 of the lower layer sheet 30 are connected by welding. All the bearing parts 31 of all the layer sheets 30 are stacked and welded together to form the edge outer frame 10 of the electromagnetic shielding waveguide ventilation window 100, and all the honeycomb parts 32 of all the layer sheets 30 are stacked and welded together to form the central honeycomb body 20 of the electromagnetic shielding waveguide ventilation window 100. After all the honeycomb parts 32 are stacked and welded together, the honeycomb holes 321 in the honeycomb part 32 on the upper side are aligned with and communicate with the corresponding honeycomb holes 321 in the carrier part 31 on the lower side.
The electromagnetic shielding waveguide ventilation window 100 provided by the embodiment is formed by sequentially stacking and welding a plurality of layer sheets 30 from bottom to top, after all the layer sheets 30 are stacked and welded, all the bearing parts 31 form the edge outer frame 10, the honeycomb parts 32 of all the layer sheets 30 form the central honeycomb body 20, and the central honeycomb body 20 has good structural stability, is not easy to damage, and has strong high-temperature resistance. The integral structure of the carrier 31 and the honeycomb 32 provides good integrity and firmness between the central honeycomb body 20 and the edge frames 10. In addition, since the electromagnetically shielded waveguide louver 100 is composed of a plurality of the lamellae 30, the honeycomb holes 321 on the lamellae 30 can be processed into small holes with an inscribed circle diameter of less than 0.5mm, so that the central honeycomb body 20 is a fine shielding structure, thereby improving shielding efficiency. Of course, the smaller diameter of the inscribed circle of the honeycomb holes 321 can effectively improve the structural rigidity of the whole device.
In this embodiment, the sheet 30 is formed with an outwardly convex protrusion 33 and an inwardly concave depression 34, which facilitates the positioning between the sheet 30 and the sheet 30, and enables the rapid stacking between the sheets 30 and the sheet 30. When the thickness of the whole is not enough after all the layers 30 are butt-welded to form the electromagnetic shielding waveguide ventilation window 100, the welded layers 30 can be continuously stacked, thereby enhancing the expansibility of the whole device.
In this embodiment, the distance between the third end surface 322 and the first end surface 311 is equal to the distance between the fourth end surface 323 and the second end surface 312, so that after the third end surface 322 of the upper layer sheet 30 contacts with the fourth end surface 323 of the lower layer sheet 30, the first end surface 311 of the upper layer sheet 30 just contacts with the second end surface 312 of the lower layer sheet 30, and a sufficient contact area between the layer sheets 30 and the layer sheets 30 is ensured, so that after the layer sheets 30 are welded to the layer sheets 30, the layer sheets are firmer.
In this embodiment, a limiting channel is formed on the electromagnetic shielding waveguide ventilation window 100, and the limiting member 40 is inserted into the limiting channel to limit the rotation between the layer sheet 30 and the layer sheet 30, so as to ensure that the honeycomb holes 321 between the layer sheet 30 and the layer sheet 30 can be aligned quickly. And meanwhile, the firmness of the layer sheet 30 after welding the layer sheet 30 can be enhanced.
In addition, in the present embodiment, the outer side wall of the bearing portion 31 is provided with the protrusion 313, the position-limiting hole 314 is provided on the protrusion 313, and the position-limiting hole 314 of the upper layer sheet 30 can be quickly aligned with the position-limiting hole 314 of the lower layer sheet 30 by the protrusion 313, so that the assembly efficiency is improved.
In this embodiment, the honeycomb holes 321 on the honeycomb part 32 are regular hexagon structures, and the honeycomb holes 321 with such a structure can ensure that the electromagnetic shielding waveguide channel window has good fan heat performance and good shielding effect. In other embodiments, the honeycomb holes 321 may have other shapes, such as circular holes, other polygonal holes, and the like.
Example 2
The present embodiment provides a method for processing the electromagnetic shielding waveguide ventilation window 100 in the above embodiment, which includes the following specific steps:
processing of the layer sheet 30: first, the respective layers 30 are subjected to a contour processing so that the concave portions 34 and the convex portions 33 are formed in the layers 30. Next, each of the layer sheets 30 is subjected to a hole forming process so that a plurality of honeycomb holes 321 are formed in the center of the layer sheet 30 and stopper holes 314 are formed in the layer sheet 30. The honeycomb holes 321 in the layer sheet 30 are located in the honeycomb parts 32, and the regions of the layer sheet 30 other than the honeycomb parts 32 are the load-bearing parts 31. The form machining and hole machining modes include but are not limited to machining, precise stamping, electrolytic etching and chemical etching; after the sheet 30 is perforated, the honeycomb holes 321 in the sheet 30 may be regular hexagons, or other polygons or irregular shapes.
Surface treatment: after the processing of the sheet 30 is completed, the sheet 30 is subjected to a surface treatment. Surface treatments include, but are not limited to, pickling, plating with a pure metal film, plating with a graded metal film, surface polishing, or passivation. The surface roughness of the surface-treated layer sheet 30 can reach 0.2 micron, and the resistance of the fluid flowing through can be effectively reduced.
Assembling: stacking the surface-treated layers 30 from bottom to top in sequence, aligning all the opposite limiting holes 314 of the layers 30 to form limiting channels, inserting the limiting members 40 into the limiting channels, and positioning the layers 30 and the layers 30 by means of electric welding. The electric welding mode can be laser welding or electron beam welding and the like.
Welding: and (3) placing all the stacked and positioned layers of sheets 30 into a diffusion welding solid-phase additive manufacturing device for diffusion welding. The welding temperature is 0.75 times of the melting point temperature of the layer sheet 30, and the heat preservation time is 0.5-2 hours. Because of the pressure welding pressure required in the welding process, a solder resist is required to be arranged between the workpiece and the equipment pressure head, and the assembly welding flux can be mica, ceramic and other materials.
The present embodiment provides a method for processing an electromagnetic shielding waveguide louver 100, which includes processing each layer sheet 30, and stacking and welding the layer sheets 30 together, so as to obtain a relatively firm electromagnetic shielding waveguide louver 100, where the electromagnetic shielding waveguide louver 100 has good high temperature resistance while ensuring sufficient heat dissipation. Because the individual laminates are processed and welded in a stacking mode, the roughness of the hole wall of the honeycomb holes 321 can be reduced, and the resistance of fluid flowing through can be effectively reduced.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An electromagnetically shielded waveguide louver comprising a plurality of plies;
the laminated sheet comprises a bearing part and a honeycomb part arranged in the center of the bearing part, a plurality of honeycomb holes are arranged on the honeycomb part, and the bearing part and the honeycomb part are of an integrated structure;
all the layer sheets are sequentially arranged from bottom to top, all the bearing parts are stacked to form an edge outer frame, and all the honeycomb parts are stacked to form a central honeycomb body;
the two ends of the bearing part in the thickness direction are provided with a first end surface and a second end surface, the two ends of the honeycomb part in the thickness direction are provided with a third end surface and a fourth end surface, the third end surface protrudes outwards relative to the first end surface to form a convex part, the fourth end surface is inwards concave relative to the second end surface to form a concave part, and the outer contour of the convex part is matched with the inner contour of the concave part;
the convex part and the concave part are both circular.
2. The electromagnetically shielded waveguide louver of claim 1, wherein the third end surface is spaced from the first end surface by a first distance, and the fourth end surface is spaced from the second end surface by a second distance, the first distance being equal to the second distance.
3. An electromagnetically shielded waveguide ventilation window according to any one of claims 1 to 2, wherein the carrying portions are provided with limiting holes, and corresponding limiting holes of all the carrying portions are aligned to form limiting passages;
the electromagnetic shielding waveguide ventilation window further comprises a limiting piece, and the limiting piece is inserted into the limiting channel.
4. An electromagnetically shielded waveguide ventilating window as claimed in claim 3, wherein a protrusion protruding outward is provided on an outer side wall of the carrying portion, and the limiting hole is provided on the protrusion.
5. An electromagnetically shielded waveguide louver according to claim 1, wherein adjacent two of said plies are joined by welding.
6. An electromagnetically shielding waveguide ventilation window as claimed in claim 1, wherein said honeycomb holes are regular hexagons.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711004850.9A CN107816301B (en) | 2017-10-25 | 2017-10-25 | Electromagnetic shielding waveguide ventilation window |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711004850.9A CN107816301B (en) | 2017-10-25 | 2017-10-25 | Electromagnetic shielding waveguide ventilation window |
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| Publication Number | Publication Date |
|---|---|
| CN107816301A CN107816301A (en) | 2018-03-20 |
| CN107816301B true CN107816301B (en) | 2020-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711004850.9A Active CN107816301B (en) | 2017-10-25 | 2017-10-25 | Electromagnetic shielding waveguide ventilation window |
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| CN (1) | CN107816301B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11930616B2 (en) * | 2019-10-18 | 2024-03-12 | Microsoft Technology Licensing, Llc | Combined heat exchanger and RF shield |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6297446B1 (en) * | 1999-02-26 | 2001-10-02 | Hewlett Packard Company | High performance EMC vent panel |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203423898U (en) * | 2013-08-09 | 2014-02-05 | 常州新区金利达电子有限公司 | Ventilation waveguide window |
| US9345182B2 (en) * | 2013-08-27 | 2016-05-17 | Parker-Hannifin Corporation | EMI shielding vent panel frame |
| CN205546407U (en) * | 2016-01-26 | 2016-08-31 | 中控高科（北京）安全技术有限公司 | Electromagnetic shield window with but air permeability |
| CN205491652U (en) * | 2016-03-31 | 2016-08-17 | 常州市多极电磁环境技术有限公司 | Waveguide window |
| CN207080140U (en) * | 2017-10-25 | 2018-03-09 | 陕西智拓固相增材制造技术有限公司 | It is electromagnetically shielded wave-guide intake and electromagnetic shield door |
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2017
- 2017-10-25 CN CN201711004850.9A patent/CN107816301B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6297446B1 (en) * | 1999-02-26 | 2001-10-02 | Hewlett Packard Company | High performance EMC vent panel |
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