CN102946708A - Low wind resistance shielding ventilation mechanism - Google Patents
Low wind resistance shielding ventilation mechanism Download PDFInfo
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- CN102946708A CN102946708A CN2012104127869A CN201210412786A CN102946708A CN 102946708 A CN102946708 A CN 102946708A CN 2012104127869 A CN2012104127869 A CN 2012104127869A CN 201210412786 A CN201210412786 A CN 201210412786A CN 102946708 A CN102946708 A CN 102946708A
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Abstract
The invention relates to an electromagnetic shielding component of electronic equipment, in particular to a low wind resistance shielding ventilation mechanism. The low wind resistance shielding ventilation mechanism at least comprises two metal frames, two steel meshes, a metal mesh and a shielding conductive gasket, and is characterized in that the two metal frames adopt rectangular metal frameworks with the same structural size; structural sizes of the two steel meshes are also the same; the metal mesh is clamped between the two steel meshes; the metal mesh clamped by the two steel meshes is arranged in the middle between the two metal frames; the two metal frames are fixedly connected with each other through rivets, so that the two metal frames, the two steel meshes and the metal mesh are fixed into a whole; and the shielding conductive gasket is additionally installed outside one side of one of the two metal frames contacting a mounting wall surface. The low wind resistance shielding ventilation mechanism not only improves the shielding efficiency, but also reduces the overall thickness and weight, does not affect ventilation, and effectively prevents the leakage of electromagnetic waves.
Description
Technical field
The present invention relates to the electromagnetic shielding component of electronic equipment, is the ventilation unit, particularly a kind of low windage shielding ventilating mechanisms of a kind of ventilation, dustproof, electromagnetic shielding.
Background technology
Along with the fast development of modern electronic technology, electronic equipment has adopted digital circuit and Power Electronic Circuit in a large number, and the while is owing to the requirement of volume, so that device interior electronic devices and components integrated level is more and more higher, power density is also increasing.For this reason, have the ventilation hole so that heat radiation at cabinet.According to shielding theory, the ventilation hole size is less, and screening effectiveness is higher; And theoretical according to heat radiation, the ventilation hole size is larger, and the effect of ventilation and heat is better.Obviously both requirements to the ventilation hole size on the performance are opposite.
Existing ventilation unit is the high-pass filtering principle according to waveguide: namely the size of waveguide aperture (cross-sectional area) has determined the cut-off frequency of waveguide, to the electromagnetic wave that is higher than waveguide cutoff frequency give by, then decayed for the electromagnetic wave that is lower than waveguide cutoff frequency, attenuation depends on the length (thickness) of waveguide, thereby existing ventilation unit is made by perforated metal plate or by the regular hexagon metal honeycomb plate.Perforated metal plate is because very thin thickness, and its screening effectiveness is lower, especially at f〉in the frequency range of 1 ~ 10GHz, the shielding electromagnetic waves efficiency attenuation is only had 10 ~ 30dB, can not satisfy shielding requirements far away; Although and regular hexagon metal honeycomb plate screening effectiveness is higher, but required thickness is about 13 ~ 40mm (13mm commonly used) generally, add and do not possess dustproof requirement, thereby be not suitable for volume (especially thickness), the strict electronic equipment of weight.
Summary of the invention
The purpose of this invention is to provide a kind of low windage shielding ventilating mechanisms, have that screening effectiveness is high, thin thickness, lightweight, can prevent dust, ventilate simultaneously.
Technical scheme of the present invention is a kind of low windage shielding ventilating mechanisms, which comprises at least two metal edge frames, two steel meshes, wire netting and screening conductive liners, and it is characterized in that: two metal edge frames are rectangular metal frameworks, and its physical dimension is identical; The physical dimension of two steel meshes is also identical, wire netting is clamped in the centre of two steel meshes, wire netting after two steel mesh clampings is arranged on the centre of two metal edge frames, and by rivet two metal edge frames is fixedly connected with, and makes two metal edge frames, two steel meshes and wire netting be fixed as integral body; Outside two metal edge frames wherein contact the side that wall is installed, install the screening conductive liner additional.
Described wire netting is copper mesh, steel mesh or conductivity arranged and there is the alloy network of coating on the surface, and the order number of its mesh is at 10 order to 100 orders, and the thickness of wire netting 3 is 0.1 millimeter to 1 millimeter.
Described metal edge frame adopts the metal surface coating processing compatible with the wire netting corrosion potential.
Described screening conductive liner is the screening conductive liner that metallic coil combination or woven wire constitute, or the conductive rubber liner, is installed at and installs between wall and the metal edge frame.
Described metal edge frame surface is coated with the nickel metal.
Described steel mesh is made by the braiding of longitude and latitude method by the mild steel wire of plating nickel on surface.
This low windage shielding ventilation unit is in 10KHz to 18GHz frequency range, and the screening effectiveness that provides is 30dB to 65dB.
Characteristics of the present invention be the main shield body thickness between 0.1 ~ 1mm, the order number is the wire netting between 10 orders～100 orders, in 10K ~ 18GHz frequency range, can provide the screening effectiveness of 30 ~ 65dB.This low windage shielding ventilation unit has not only improved screening effectiveness, has also reduced integral thickness, weight, does not affect again ventilation, has effectively prevented electromagnetic leakage.
Description of drawings
Fig. 1 is the overall structure schematic diagram of low windage shielding ventilation unit;
Fig. 2 is the solution structure schematic diagram that low windage shielding ventilation unit divides.
Among the figure: 1, metal edge frame; 2, steel mesh; 3, wire netting; 4, screening conductive liner; 5, rivet.
Embodiment
As depicted in figs. 1 and 2, the main body of low windage shielding ventilation unit has mainly comprised 1, two steel mesh 2 of two metal edge frames and a wire netting 3.
Wire netting 3 is copper mesh, steel mesh or conductivity arranged and there is the alloy network of coating on the surface, and the order number of its mesh is at 10 order to 100 orders, and the thickness of wire netting 3 is 0.1 millimeter to 1 millimeter.
Wire netting 3 has kept the micropore air permeability, and thickness only has 0.1 ~ 1mm with the wire netting of micropore to be one, is far smaller than the common 13 ~ 40mm thickness of waveguide shielding ventilating window.Its differential static pressure (loss) is that 5 ~ 35Pa(1.5 ~ 7m/s), also the waveguide well below the adding dustproof sponge shields ventilating window.Wire netting 3 has low windage, high air permeability.
The size of two metal edge frames 1 is identical with structure, adopts the metal surface coating processing compatible with wire netting 3 corrosion potentials, and plating nickel on surface outside, makes it have electrochemically resistant and learns corrosion.
Steel mesh 2 is made by the braiding of longitude and latitude method by the mild steel wire of plating nickel on surface.
In the middle of two steel meshes 2 are clamped in wire netting 3, in the middle of by two metal edge frames 1 two steel meshes 2 and wire netting 3 being clamped in again, and by rivet 5 two metal edge frames 1 are fixedly connected with, make two metal edge frames 1, two steel meshes 2 and wire netting 3 be fixed as integral body.
The main body of complete low windage shielding ventilation unit is metal edge frame 1, steel mesh 2, wire netting 3, steel mesh 2 and metal edge frame 1 successively from a side to the opposite side each several part.
When the main body of complete low windage shielding ventilation unit was fitted installation with the installation wall, metal edge frame 1 outside that wall is installed in contact installed screening conductive liner 4 additional.
Screening conductive liner 4 is screening conductive liners that metallic coil combination or woven wire constitute, or the conductive rubber liner.
This low windage shielding ventilation unit is in 10KHz to 18GHz frequency range, and the screening effectiveness that provides is 30dB to 65dB.
The parts that the present embodiment is not described in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not one by one narration.
Claims (7)
1. one kind low windage shields ventilating mechanisms, which comprises at least two metal edge frames (1), two steel meshes (2), wire netting (3) and screening conductive liner (4), it is characterized in that: two metal edge frames (1) are rectangular metal frameworks, and its physical dimension is identical; The physical dimension of two steel meshes (2) is also identical, wire netting (3) is clamped in the centre of two steel meshes (2), wire netting (3) after two steel meshes (2) clamping is arranged on the centre of two metal edge frames (1), and by rivet (5) two metal edge frames (1) are fixedly connected with, make two metal edge frames (1), two steel meshes (2) and wire netting (3) be fixed as integral body; Outside two metal edge frames (1) wherein contact the side that wall is installed, install screening conductive liner (4) additional.
2. a kind of low windage shielding ventilating mechanisms described in according to claim 1, it is characterized in that: described wire netting (3) is copper mesh, steel mesh or conductivity is arranged and the surperficial alloy network that coating is arranged, the order number of its mesh is at 10 order to 100 orders, and the thickness of wire netting (3) is 0.1 millimeter to 1 millimeter.
3. a kind of low windage shielding ventilating mechanisms described in according to claim 1, it is characterized in that: described metal edge frame (1) adopts the metal surface coating processing compatible with wire netting (3) corrosion potential.
4. a kind of low windage shielding ventilating mechanisms described in according to claim 1, it is characterized in that: described screening conductive liner (4) is the screening conductive liner that metallic coil combination or woven wire constitute, or the conductive rubber liner, be installed at and install between wall and the metal edge frame (1).
5. a kind of low windage shielding ventilating mechanisms described in according to claim 1, it is characterized in that: described metal edge frame (1) surface is coated with the nickel metal.
6. a kind of low windage shielding ventilating mechanisms described in according to claim 1, it is characterized in that: described steel mesh (2) is made by the braiding of longitude and latitude method by the mild steel wire of plating nickel on surface.
7. a kind of low windage shielding ventilating mechanisms described in according to claim 1, it is characterized in that: this low windage shielding ventilation unit is in 10KHz to 18GHz frequency range, and the screening effectiveness that provides is 30dB to 65dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104127869A CN102946708A (en) | 2012-10-25 | 2012-10-25 | Low wind resistance shielding ventilation mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104127869A CN102946708A (en) | 2012-10-25 | 2012-10-25 | Low wind resistance shielding ventilation mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102946708A true CN102946708A (en) | 2013-02-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104127869A Pending CN102946708A (en) | 2012-10-25 | 2012-10-25 | Low wind resistance shielding ventilation mechanism |
Country Status (1)
| Country | Link |
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| CN (1) | CN102946708A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522646A (en) * | 2016-12-30 | 2017-03-22 | 福建省军鹏特种装备研究院有限公司 | Aluminum vented shielding window |
| CN109041564A (en) * | 2018-09-03 | 2018-12-18 | 阳光电源股份有限公司 | A kind of electromagnetic shielding shell |
| CN112038915A (en) * | 2020-09-03 | 2020-12-04 | 中国人民解放军海军工程大学 | Opposite-mounted vertical air-cooling heat dissipation system and control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001050828A1 (en) * | 1999-12-31 | 2001-07-12 | Adriano Vignudelli | Electromagnetic waves shielding glass and method for its production |
| CN201234439Y (en) * | 2008-06-24 | 2009-05-06 | 陕西中安机电有限公司 | Electromagnetic shielding ventilation device |
| CN201657590U (en) * | 2009-12-30 | 2010-11-24 | 西安开容电子技术有限责任公司 | Multifunctional electromagnetic shielding ventilation device with dustproof and rainproof ability |
| CN202918646U (en) * | 2012-10-25 | 2013-05-01 | 西安开容电子技术有限责任公司 | Low wind resistance type shielding ventilation device |
-
2012
- 2012-10-25 CN CN2012104127869A patent/CN102946708A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001050828A1 (en) * | 1999-12-31 | 2001-07-12 | Adriano Vignudelli | Electromagnetic waves shielding glass and method for its production |
| CN201234439Y (en) * | 2008-06-24 | 2009-05-06 | 陕西中安机电有限公司 | Electromagnetic shielding ventilation device |
| CN201657590U (en) * | 2009-12-30 | 2010-11-24 | 西安开容电子技术有限责任公司 | Multifunctional electromagnetic shielding ventilation device with dustproof and rainproof ability |
| CN202918646U (en) * | 2012-10-25 | 2013-05-01 | 西安开容电子技术有限责任公司 | Low wind resistance type shielding ventilation device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522646A (en) * | 2016-12-30 | 2017-03-22 | 福建省军鹏特种装备研究院有限公司 | Aluminum vented shielding window |
| CN109041564A (en) * | 2018-09-03 | 2018-12-18 | 阳光电源股份有限公司 | A kind of electromagnetic shielding shell |
| CN112038915A (en) * | 2020-09-03 | 2020-12-04 | 中国人民解放军海军工程大学 | Opposite-mounted vertical air-cooling heat dissipation system and control method |
| CN112038915B (en) * | 2020-09-03 | 2022-06-28 | 中国人民解放军海军工程大学 | Opposite-mounted vertical air-cooling heat dissipation system and control method |
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Application publication date: 20130227 |
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| RJ01 | Rejection of invention patent application after publication |