A layered protection type electromagnetic shielding room

Abstract

This utility model relates to the field of electromagnetic shielding room technology, specifically disclosing a layered protective electromagnetic shielding room, including an electromagnetic shielding room body. The inner wall of the electromagnetic shielding room is covered with a shielding panel, which includes the following six layers arranged sequentially from the inside out: a metal substrate layer, made of aluminum alloy or stainless steel, with a thickness of 0.5-3 mm; a conductive adhesive layer, made of silver paste or conductive epoxy resin, with a thickness of 0.05-0.2 mm; an electromagnetic absorbing layer, made of ferrite or carbon fiber composite material, with a thickness of 1-5 mm; a flexible conductive layer, made of graphene or carbon nanotube reinforced conductive rubber, with a thickness of 0.1-0.5 mm; and a metal mesh layer. This layered protective electromagnetic shielding room, through the synergistic effect of the six-layer composite structure, can not only achieve efficient shielding and effectively block internal and external electromagnetic interference, but also has structural strength, flexibility, and weather resistance, meeting the stringent protection requirements of precision instruments and data centers.

Description

Technical Field

[0001] This utility model belongs to the field of electromagnetic shielding room technology, and in particular relates to a layered protection type electromagnetic shielding room. Background Technology

[0002] Electromagnetic shielding rooms are special sealed spaces constructed with metal materials. They can reflect and absorb electromagnetic waves through shielding layers, effectively blocking electromagnetic waves radiated outward from internal equipment, while preventing external electromagnetic interference from intruding. They provide an interference-free electromagnetic environment for testing sensitive electronic equipment and high-security communications.

[0003] Existing electromagnetic shielding rooms mostly use single-layer metal plates or simple composite material structures. First, the shielding bandwidth is narrow, and the shielding effectiveness of traditional steel plate structures decreases sharply in the high-frequency band above 10MHz. Second, they have poor environmental adaptability. Conventional coatings are prone to oxidation and corrosion in humid environments, resulting in a decrease in shielding effectiveness of more than 30% after 1 to 2 years of use. This makes it difficult to meet the stringent requirements of modern data centers for wide bandwidth (10MHz-18GHz), high stability (shielding effectiveness ≥100dB), and long-term reliability. Utility Model Content

[0004] The purpose of this invention is to provide a layered protective electromagnetic shielding room to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a layered protective electromagnetic shielding room, comprising an electromagnetic shielding room body, wherein the inner wall of the electromagnetic shielding room is covered with a shielding panel, and the shielding panel comprises the following six layers arranged sequentially from the inside to the outside:

[0006] The metal substrate layer is made of aluminum alloy or stainless steel and has a thickness of 0.5 to 3 mm.

[0007] The conductive adhesive layer is composed of silver paste or conductive epoxy resin and has a thickness of 0.05 to 0.2 mm.

[0008] The electromagnetic absorbing layer is made of ferrite or carbon fiber composite material and has a thickness of 1 to 5 mm.

[0009] The flexible conductive layer is made of graphene or carbon nanotube-reinforced conductive rubber with a thickness of 0.1–0.5 mm.

[0010] The metal mesh layer is formed by laser etching of copper or silver to create a micron-scale mesh structure.

[0011] The protective coating is a corrosion-resistant and wear-resistant polyurethane or fluorocarbon resin coating with a thickness of 10~50μm.

[0012] Preferably, the metal mesh layer has a mesh line width of 10~50μm and a mesh spacing of 0.5~2mm.

[0013] Preferably, the electromagnetic absorbing layer has a real part μ'≥2 and an imaginary part μ"≥1 permeability at a frequency of 1GHz.

[0014] Preferably, the surface resistance of the flexible conductive layer is ≤1Ω / sq, and it is composited with the metal mesh layer through a hot-pressing process.

[0015] Preferably, the electromagnetic shielding effectiveness of the shielding panel in the 10MHz~18GHz frequency band is ≥100dB.

[0016] Preferably, according to the GB / T 12190 standard test, the overall shielding effectiveness of the electromagnetic shielding room in the 10MHz~18GHz frequency band is ≥120dB.

[0017] In summary, compared with the prior art, the beneficial effects of this utility model are: through the synergistic effect of the six-layer composite structure, it can not only achieve efficient shielding and effectively block internal and external electromagnetic interference, but also has structural strength, flexibility and weather resistance, meeting the stringent protection requirements of precision instruments and data centers. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a front sectional view of the present invention;

[0020] Figure 3 This is a planar structural diagram of the shielding panel of this utility model.

[0021] Legend:

[0022] 1. Electromagnetic shielding chamber body; 2. Shielding panel; 3. Metal substrate layer; 4. Conductive adhesive layer; 5. Electromagnetic absorption layer; 6. Flexible conductive layer; 7. Metal mesh layer; 8. Protective coating. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-3 This utility model provides a technical solution:

[0025] A layered electromagnetic shielding room includes an electromagnetic shielding room body 1, characterized in that: the inner wall of the electromagnetic shielding room is covered with a shielding panel 2, and the shielding panel 2 includes the following six layers arranged sequentially from the inside to the outside:

[0026] The metal substrate layer 3 is made of aluminum alloy or stainless steel and has a thickness of 0.5 to 3 mm.

[0027] The conductive adhesive layer 4 is composed of silver paste or conductive epoxy resin and has a thickness of 0.05 to 0.2 mm.

[0028] Electromagnetic absorbing layer 5 is made of ferrite or carbon fiber composite material and has a thickness of 1 to 5 mm.

[0029] The flexible conductive layer 6 is made of conductive rubber reinforced with graphene or carbon nanotubes, with a thickness of 0.1 to 0.5 mm.

[0030] Metal mesh layer 7 is formed by laser etching of copper or silver to create a micron-scale mesh structure;

[0031] The protective coating 8 is a corrosion-resistant and wear-resistant polyurethane or fluorocarbon resin coating with a thickness of 10~50μm.

[0032] The metal mesh layer 7 has a mesh line width of 10~50μm and a mesh spacing of 0.5~2mm.

[0033] The electromagnetic absorbing layer 5 has a real part μ'≥2 and an imaginary part μ"≥1 at a frequency of 1GHz.

[0034] The surface resistance of the flexible conductive layer 6 is ≤1Ω / sq, and it is composited with the metal mesh layer 7 through a hot pressing process.

[0035] The electromagnetic shielding effectiveness of shielding panel 2 in the 10MHz~18GHz frequency band is ≥100dB.

[0036] According to the GB / T 12190 standard, the overall shielding effectiveness of the electromagnetic shielding room in the 10MHz~18GHz frequency band is ≥120dB.

[0037] Working principle:

[0038] In the layered electromagnetic shielding room, the metal substrate layer 3 (0.5-3mm aluminum alloy / stainless steel) provides basic support and low-frequency shielding;

[0039] Conductive adhesive layer 4 (0.05-0.2mm silver paste / conductive epoxy resin) ensures reliable conductive connection between layers;

[0040] Electromagnetic absorbing layer 5 (1-5mm ferrite / carbon fiber composite material) attenuates high-frequency electromagnetic waves through its magnetic permeability characteristics of μ'≥2 and μ"≥1;

[0041] The flexible conductive layer 6 (0.1-0.5mm graphene / carbon nanotube reinforced conductive rubber) gives the panel resistance to deformation (surface resistance ≤1Ω / sq).

[0042] The metal mesh layer 7 (10-50μm linewidth copper / silver mesh, 0.5-2mm spacing) is formed into a precision conductive network by laser etching;

[0043] Protective coating 8 (10-50μm polyurethane / fluorocarbon resin) provides corrosion protection;

[0044] Each layer is composited through a hot-pressing process, enabling shielding panel 2 to achieve a shielding effectiveness of ≥100dB in the 10MHz-18GHz frequency band. The overall shielding room can achieve ≥120dB according to the GB / T 12190 standard, while also possessing structural strength, environmental adaptability and long-term stability.

[0045] This layered electromagnetic shielding room achieves efficient electromagnetic protection through six layers of composite shielding panels 2 laid on the inner wall: when external electromagnetic waves are incident, the outermost polyurethane or fluorocarbon resin protective coating 8 first provides corrosion-resistant and wear-resistant protection to prevent environmental factors from causing the panel performance to degrade.

[0046] Subsequently, the electromagnetic waves penetrate to the micron-scale metal mesh layer 7 etched by copper or silver laser. This layer forms a high-frequency filtering network through the capacitance effect of the mesh gaps and the inductance effect of the metal conductor, which initially attenuates high-frequency interference above 10 GHz.

[0047] Next, the graphene or carbon nanotube reinforced conductive rubber flexible conductive layer 6 fills the frequency band gap of the metal grid through its three-dimensional conductive network, while using the flexibility of the rubber matrix to buffer external mechanical impact, and is tightly compounded with the metal grid layer 7 through hot pressing process to avoid electromagnetic leakage at the interface.

[0048] Further inward, the ferrite or carbon fiber composite electromagnetic absorbing layer 5 converts electromagnetic energy in the 1GHz~10GHz frequency band into heat energy through magnetic loss and dielectric loss mechanisms. The imaginary part μ" of the magnetic permeability of ferrite is ≥1, which gives it strong absorption capability in this frequency band.

[0049] Subsequently, the silver paste or conductive epoxy resin conductive adhesive layer 4 guides the residual electromagnetic waves to the metal substrate layer 3 through high conductivity, while providing interlayer mechanical bonding.

[0050] The innermost aluminum alloy or stainless steel metal substrate layer 3 utilizes the skin effect of metal to form a reflection barrier for low-frequency electromagnetic waves of 10MHz~1GHz, and its high strength characteristics also provide structural support for the shielding room.

[0051] Ultimately, the six-layer structure, through the synergistic effect of "protection-filtering-absorption-guidance-reflection", enables shielding panel 2 to achieve a shielding effectiveness of ≥100dB in the 10MHz~18GHz frequency band, while the electromagnetic shielding room as a whole achieves a shielding effectiveness of ≥120dB in the same frequency band according to the GB / T 12190 standard test, fully covering the wide-band, high-reliability electromagnetic protection requirements of precision instruments and data centers;

[0052] This layered electromagnetic shielding room, through the synergistic effect of its six-layer composite structure, not only achieves efficient shielding and effectively blocks internal and external electromagnetic interference, but also possesses structural strength, flexibility, and weather resistance, meeting the stringent protection requirements of precision instruments and data centers.

[0053] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A layered electromagnetic shielding room, comprising an electromagnetic shielding room body (1), characterized in that: The inner wall of the electromagnetic shielding chamber is covered with a shielding panel (2), which comprises the following six layers arranged sequentially from the inside to the outside: The metal substrate layer (3) is made of aluminum alloy or stainless steel and has a thickness of 0.5 to 3 mm. The conductive adhesive layer (4) is composed of silver paste or conductive epoxy resin and has a thickness of 0.05 to 0.2 mm. The electromagnetic absorbing layer (5) is made of ferrite or carbon fiber composite material and has a thickness of 1 to 5 mm. The flexible conductive layer (6) is made of conductive rubber reinforced with graphene or carbon nanotubes, with a thickness of 0.1 to 0.5 mm. The metal mesh layer (7) is formed by laser etching of copper or silver to create a micron-scale mesh structure; The protective coating (8) is a corrosion-resistant and wear-resistant polyurethane or fluorocarbon resin coating with a thickness of 10~50μm.

2. The layered protective electromagnetic shielding room according to claim 1, characterized in that, The metal mesh layer (7) has a mesh line width of 10~50μm and a mesh spacing of 0.5~2mm.

3. The layered protective electromagnetic shielding room according to claim 1, characterized in that, The electromagnetic absorbing layer (5) has a real part μ'≥2 and an imaginary part μ"≥1 at a frequency of 1GHz.

4. The layered protection electromagnetic shielding room according to claim 1, characterized in that, The surface resistance of the flexible conductive layer (6) is ≤1Ω / sq, and it is composited with the metal mesh layer (7) by a hot pressing process.

5. The layered protection electromagnetic shielding room according to any one of claims 2 to 4, characterized in that: The shielding panel (2) has an electromagnetic shielding effectiveness of ≥100dB in the 10MHz~18GHz frequency band.

6. The layered protection electromagnetic shielding room according to claim 1, characterized in that: According to the GB / T 12190 standard, the overall shielding effectiveness of the electromagnetic shielding room in the 10MHz~18GHz frequency band is ≥120dB.

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