CN2681351Y - Shielding device capable of suppressing radiation interference of radiator - Google Patents
Shielding device capable of suppressing radiation interference of radiator Download PDFInfo
- Publication number
- CN2681351Y CN2681351Y CN 200320109811 CN200320109811U CN2681351Y CN 2681351 Y CN2681351 Y CN 2681351Y CN 200320109811 CN200320109811 CN 200320109811 CN 200320109811 U CN200320109811 U CN 200320109811U CN 2681351 Y CN2681351 Y CN 2681351Y
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- CN
- China
- Prior art keywords
- radiator
- metallic shield
- net
- inhibition
- interference
- 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.)
- Expired - Fee Related
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The utility model provides a shielding technique capable of suppressing radiation interference of radiator. The environment and the top of the radiator installed on an electronic device using the radiator to proceed the cooling are provided with one layer of metal shielding net uniformly knitted and capable of ensuring the normal ventilation, the combining points of any two faces and any crossing points of the shielding net are completely and electrically connected, and the bottom edges of the four side faces of the shielding net proceed the multipoint grounding for the radiator. The technique making use of the metal shielding net to suppress the electromagnetic radiation interference of the radiator makes use of the electromagnetic shielding principle to make an electromagnetic wave directly radiated by the radiator obviously attenuate when passing through the metal shielding net without affecting the radiation efficiency of the radiator and increasing the noise of the radiator returning to the grounding plane so as to effectively suppress the radiation interference of the radiator.
Description
Affiliated technical field:
The utility model relates to the shield technology of the electromagnetic interference of the radiator of installing on the electronic device that can significantly suppress to use radiator to cool off in the electronic equipment, and its cost is low, and technology is simple, and can not influence the cooling effect of radiator.
Background technology:
At present, the electromagnetic interference for the radiator of installing on the electronic device that uses radiator to cool off in the electronic equipment can suppress by the parasitic capacitance that reduces between radiator and the heater members, but also influences the cooling effect [1] of radiator simultaneously; Or with radiator ground connection, ground lead is many more, and is thick more, arranges evenly more, suppresses effect good more [2].But for the strict electronic equipment of electromagnetic compatibility standard, and the radiated interference that produces of radiator constantly increases the weight of along with the rising of heater members upper reaches overcurrent signal frequency, these measures are just powerless, can only further be suppressed by the bulk shielding performance that increases cabinet, but this bar also can reduce the ventilation and heat performance of cabinet.
List of references:
[1]Gordana?Felic，Rob?Evans，‘Study?of?Heat?sink?EMI?Effects?in?SMPS?Circuits’，IEEE?International?Symposium?on?EMC，2001，pp254-259
[2]J?F?Dawson，‘The?Effect?of?Grounding?on?Radiated?Emissions?from?Heatsinks’，IEEE?International?Symposium?on?EMC，2001，pp1248-1252
Summary of the invention:
For the measure of the electromagnetic interference that overcomes in the existing inhibition electronic equipment radiator of installing on the electronic device that uses radiator to cool off suppresses the effect deficiency, the utility model provides the shield technology of a radiator, this technology not only can more effectively suppress the radiated interference of radiator than existing measure, and be easy to technically realize, cost is low, and can not influence the cooling effect of radiator.
The technical scheme that its technical problem that solves the utility model adopts is: install one deck braiding even metal gauze screen additional for the top that reaches of radiator all around, gauze screen can be become by aluminium alloy or copper, the junction of its any two faces all must be electrically connected fully, and any crosspoint of gauze screen also all must be electrically connected fully.On the base of four sides of gauze screen, it is carried out multipoint earthing, promptly on each base, determine 2～5 earth points that are evenly distributed, and use the pin that passes printed wiring board that these points are linked to each other with the ground plane of printed wiring board, earth point is many more, pin is wide more, and the effect that suppresses the radiator radiation is just good more.This layer gauze screen is 1mm～5mm to the distance of spreader surface, and distance is the bigger the better under the situation of space permission, and gauze screen does not have any connection with radiator.The shield effectiveness of the wire netting that count is big more is good more, and getting diameter wiry usually is 0.15mm～0.5mm, and the braiding space is 1mm～2mm, and this also is overstocked and influence the cooling effect of radiator in order to guarantee to be unlikely to the metallic shield net.
This technology of utilizing the metallic shield net to suppress the electromagnetic interference of radiator is to utilize the principle of electromagnetic shielding, make the electromagnetic wave of going out from the radiator direct radiation, significant decay takes place through the metallic shield net time, and don't influence the radiating efficiency of radiator, can not increase the noise that turns back to ground plane by radiator yet, thereby realize effective inhibition the radiator radiated interference.
The beneficial effects of the utility model are, the electromagnetic interference of the radiator of installing on the electronic device that can significantly suppress to use radiator to cool off in the electronic equipment, and the maximum efficiency that this inhibition effect will can reach much larger than prior art, its cost is low, technology is simple, and can not influence the cooling effect of radiator.
Description of drawings:
Be in conjunction with the accompanying drawings and embodiments utility model to be further specified below.
Fig. 1 is the structure chart that is used for suppressing the metallic shield net of radiator electromagnetic interference.
Fig. 2 is the side scheme of installation of metallic shield net.
Fig. 3 is that the metallic shield net is installed to construction profile later on the radiator.
1. metallic shield nets among the figure, the 2. metal supporting frames of gauze screen, the 3. grounding pin of metallic shield net, 4. radiator, the 5. electronic device that uses radiator to cool off, 6. printed wiring board, 7. solder joint, the 8. ground plane of printed wiring board, 9. installation direction.
Embodiment:
In order to make metallic shield net (1) that better structural strength be arranged, use metal supporting frames (2) that gauze screen (1) is connected into an integral body among Fig. 1.In the scheme of installation of metallic shield net (1) shown in Figure 2, metallic shield net (1) covers radiator (4) and the electronic device (5) that uses radiator to cool off along installation direction (9), and is fixed on the printed wiring board (6) by grounding pin (3) at last.Fig. 3 has shown that metallic shield net (1) is installed to radiator (4) and goes up later structure, radiator (4) and electronic device (5) the conductively-closed net (4) and the printed wiring board (6) that use radiator to cool off surround fully, and all grounding pins (3) of metallic shield net (1) all must be welded together with ground plane (8).
Claims (3)
1. the shield technology of an inhibition radiator (4) radiated interference, to the electronic device (5) that uses radiator to cool off, use metallic shield net (1) that the electromagnetic interference of its generation is suppressed, it is characterized in that: give radiator (4) around and the top install one deck braiding additional uniformly and can guarantee normal that ventilate and the no any metallic shield net (1) that is electrically connected of radiator (4), and on the base of (1) four side of gauze screen, it is carried out multipoint earthing by grounding pin (3).
2. the shield technology of inhibition radiator according to claim 1 (4) radiated interference, it is characterized in that: the junction of any two faces of metallic shield net (1) all must be electrically connected fully with the metal supporting frames (2) that supports gauze screen (1) structure, and any crosspoint on the gauze screen (1) also all must be electrically connected fully; The count of metallic shield net (1) is as the criterion with the cooling effect that does not influence radiator (4), and getting diameter wiry usually is 0.15mm～0.5mm, and the braiding space is 1mm～2mm.
3. the shield technology of inhibition radiator according to claim 1 (4) radiated interference, it is characterized in that: the distance between metallic shield net (1) and radiator (4) surface is 1mm～5mm, distance is big more under the situation about allowing in the electronic equipment internal space, and the inhibition effect of the electromagnetic interference that radiator (4) is produced is just good more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320109811 CN2681351Y (en) | 2003-11-21 | 2003-11-21 | Shielding device capable of suppressing radiation interference of radiator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320109811 CN2681351Y (en) | 2003-11-21 | 2003-11-21 | Shielding device capable of suppressing radiation interference of radiator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2681351Y true CN2681351Y (en) | 2005-02-23 |
Family
ID=34599332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320109811 Expired - Fee Related CN2681351Y (en) | 2003-11-21 | 2003-11-21 | Shielding device capable of suppressing radiation interference of radiator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2681351Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867627A (en) * | 2009-12-22 | 2010-10-20 | 康佳集团股份有限公司 | Shielding cover device of mobile phone baseband |
| US7889503B2 (en) | 2006-08-31 | 2011-02-15 | Nintendo Co., Ltd. | Electronic appliance having an electronic component and a heat-dissipating plate |
| CN109872976A (en) * | 2019-03-01 | 2019-06-11 | 晶晨半导体（深圳）有限公司 | A method of for solving the antenna effect of cooling fin |
-
2003
- 2003-11-21 CN CN 200320109811 patent/CN2681351Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7889503B2 (en) | 2006-08-31 | 2011-02-15 | Nintendo Co., Ltd. | Electronic appliance having an electronic component and a heat-dissipating plate |
| CN101137282B (en) * | 2006-08-31 | 2012-01-04 | 任天堂株式会社 | Electronic appliance |
| CN101867627A (en) * | 2009-12-22 | 2010-10-20 | 康佳集团股份有限公司 | Shielding cover device of mobile phone baseband |
| CN101867627B (en) * | 2009-12-22 | 2015-06-24 | 康佳集团股份有限公司 | Shielding cover device of mobile phone baseband |
| CN109872976A (en) * | 2019-03-01 | 2019-06-11 | 晶晨半导体（深圳）有限公司 | A method of for solving the antenna effect of cooling fin |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |