CN101807098A - Method for preventing EMI leakage by adopting conductive foam cotton - Google Patents
Method for preventing EMI leakage by adopting conductive foam cotton Download PDFInfo
- Publication number
- CN101807098A CN101807098A CN 201010131122 CN201010131122A CN101807098A CN 101807098 A CN101807098 A CN 101807098A CN 201010131122 CN201010131122 CN 201010131122 CN 201010131122 A CN201010131122 A CN 201010131122A CN 101807098 A CN101807098 A CN 101807098A
- Authority
- CN
- China
- Prior art keywords
- foam cotton
- emi
- emi leakage
- sections
- foam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000006260 foam Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 12
- 229920000742 Cotton Polymers 0.000 title claims abstract description 9
- 239000000463 material Substances 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000000191 radiation effect Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention relates to a method for preventing EMI leakage by adopting conductive foam cotton, which adopts foam cotton sections with good electric conduction performance, and the foam cotton sections are embedded in various gaps of a server case for shielding modules and elements in the case and preventing the EMI leakage; and after a power supply is assembled, shutters made of sheet cotton sections are arranged on a window and a through hole. Each foam cotton section comprises special sections with cross section taking on rectangular or round strip, board or the like. By adopting the high electric conduction performance and good deformation characteristic of the conductive foam cotton, the method well solves the problem of 'blocking' the gaps, thus having the advantages of being simple in assembly and reducing the EMI leakage of a server. The method has the benefit of providing the method which has simple assembly, prevents the EMI leakage and is good in application valve.
Description
Technical field
The present invention relates to computing machine electromagnetic compatibility field, be specifically related to a kind of conducting foam that adopts and prevent the method that EMI leaks.
Background technology
The computer system that comprises server has many assemblies, and as CPU, mainboard, hard disk, power supply or the like, they are electromagnetic interference source on the one hand, and a large amount of electromagnetic energies that send during work can disturb the normal operation of surrounding devices or assembly; They also are the electromagnetic interference (EMI) sensitive equipments on the other hand, if electromagnetic interference (EMI) energy on every side is very strong, and will cisco unity malfunction or cause that performance descends.So computing machine must have the measure of inhibition EMI (electromagnetic interference (EMI)), the most frequently used is shield technology, promptly adopts the cabinet of metal material that the high frequency radiation energy is shielded, in order to avoid influence the equipment around it, and as colour TV, air-conditioning etc.
In theory, adopt airtight metal material cabinet fully, shield effectiveness is best.Yet, the actual calculation machine enclosure has many holes seam inevitably, as ventilating heat dissipating hole, chassis lid seam, power supply assembling rear window ... theoretical according to the hole seam, if hole seam length will cause serious EMI to leak, therefore greater than 1/2 o'clock of the frequency electromagnetic waves wavelength, the perforate of cabinet, the design of cracking all need to follow certain standard, are designed to 0.05 times of (requirement) minimum electromagnetic wavelength even littler as the diameter in hole.Usually, computer cabinet EMC design is rather ripe, and EMI leaks and suppressed well.Yet in actual applications, particularly the structure matching aspect because particular design causes some assembly (as power supply) and cabinet " windowing " big slit to occur, if unconstrained, just be very easy to very big EMI to occur and leak.
Summary of the invention
The purpose of this invention is to provide a kind of conducting foam that adopts and prevent the method that EMI leaks.
The objective of the invention is to realize in the following manner, employing has the foam section bar of excellent conductive performance, be embedded in the various slits of machine box for server the module component in the cabinet shielded and prevent that EMI from leaking, on power supply assembling rear window and air vent, install the window shutter of making by the cotton section bar of sheet additional
The foam section bar comprises rectangular, the circular bar of section or sheet material or other various profile shapes.
Excellent effect of the present invention is that method is simple, material is easy to get, and implements conveniently, prevents characteristics such as the EMI leakage effect is good, has good value for applications.
Embodiment
Method of the present invention is high conduction performance and the good deformation behavior that adopts conducting foam to have, and " blocks up " well or shields and live hole seam or window, and server EMI leaks and the radiation effect of peripheral EMI to reduce.
Embodiment
Inwall at cabinet plastics front panel covers with the foam light sheet, inlay with the foam bar with the slit of the connecting portion of cabinet, at the same setting-in foam of the contact edge of chassis backplane and chassis cover bar, the window shutter made from foam on power supply assembling rear window shields, the making of foam window shutter can be made by bonding, and shape is identical with the common building window shutter.The power supply assembling rear window of prior art has only a screen cloth, the foam window shutter directly is bonded in the screen cloth outside to get final product, because electromagnetic radiation is rectilinear propagation, after the refraction shielding of foam window shutter, the EMI that can prevent server fully leak or other external EMI of periphery to the radiation effect of server.
Claims (2)
1. one kind is adopted conducting foam to prevent the method that EMI leaks, it is characterized in that, employing has the foam section bar of excellent conductive performance, be embedded in the various slits of machine box for server the module component in the cabinet shielded and prevent that EMI from leaking, on power supply assembling rear window and air vent, install the window shutter of making by the cotton section bar of sheet additional.
2. according to the described method of claim 1, it is characterized in that the foam section bar comprises rectangular, the circular bar of section or sheet material or other various profile shapes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010131122 CN101807098A (en) | 2010-03-24 | 2010-03-24 | Method for preventing EMI leakage by adopting conductive foam cotton |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010131122 CN101807098A (en) | 2010-03-24 | 2010-03-24 | Method for preventing EMI leakage by adopting conductive foam cotton |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101807098A true CN101807098A (en) | 2010-08-18 |
Family
ID=42608915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010131122 Pending CN101807098A (en) | 2010-03-24 | 2010-03-24 | Method for preventing EMI leakage by adopting conductive foam cotton |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101807098A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102711350A (en) * | 2011-03-28 | 2012-10-03 | 鸿富锦精密工业（深圳）有限公司 | Portable electronic device with conductive foam |
| CN102711425A (en) * | 2012-05-25 | 2012-10-03 | 昆山市飞荣达电子材料有限公司 | Flat-clamped conductive foam |
| CN106814825A (en) * | 2015-11-27 | 2017-06-09 | 中国长城科技集团股份有限公司 | Rack-mount server |
| CN108761230A (en) * | 2018-05-17 | 2018-11-06 | 郑州云海信息技术有限公司 | A kind of device and application method of enhancing server model machine baffle IO test effects |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201207776Y (en) * | 2008-05-28 | 2009-03-11 | 京信通信系统（中国）有限公司 | Upper and lower cover sealing construction for communication device outdoor machine case |
-
2010
- 2010-03-24 CN CN 201010131122 patent/CN101807098A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201207776Y (en) * | 2008-05-28 | 2009-03-11 | 京信通信系统（中国）有限公司 | Upper and lower cover sealing construction for communication device outdoor machine case |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102711350A (en) * | 2011-03-28 | 2012-10-03 | 鸿富锦精密工业（深圳）有限公司 | Portable electronic device with conductive foam |
| CN102711425A (en) * | 2012-05-25 | 2012-10-03 | 昆山市飞荣达电子材料有限公司 | Flat-clamped conductive foam |
| CN106814825A (en) * | 2015-11-27 | 2017-06-09 | 中国长城科技集团股份有限公司 | Rack-mount server |
| CN106814825B (en) * | 2015-11-27 | 2023-11-03 | 中国长城科技集团股份有限公司 | Rack-mounted server |
| CN108761230A (en) * | 2018-05-17 | 2018-11-06 | 郑州云海信息技术有限公司 | A kind of device and application method of enhancing server model machine baffle IO test effects |
| CN108761230B (en) * | 2018-05-17 | 2021-02-02 | 苏州浪潮智能科技有限公司 | Device for enhancing IO test effect of baffle of server prototype and use method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100818 |