CN105228397A - A kind of electrical appliance kit - Google Patents
A kind of electrical appliance kit Download PDFInfo
- Publication number
- CN105228397A CN105228397A CN201510741951.9A CN201510741951A CN105228397A CN 105228397 A CN105228397 A CN 105228397A CN 201510741951 A CN201510741951 A CN 201510741951A CN 105228397 A CN105228397 A CN 105228397A
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- electrical appliance
- appliance kit
- frequency
- circular port
- box body
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Abstract
This application discloses a kind of electrical appliance kit, the basis of existing electrical appliance kit adopts circular port replace slot, be metal material due to electrical appliance kit and have certain thickness, therefore, each circular port forms a circular waveguide.Waveguide is a kind of high pass filter for electromagnetic wave, there is the cut-off frequency determined, when electromagnetic interfering frequency is lower than this cut-off frequency, electromagnetic wave is not just by waveguide, so by the cut-off frequency of circular waveguide being set the frequency higher than interference signal, just can realize, to effective shielding of this interference signal, reducing the interference to other electrical equipment, improve the EMC performance of complete machine.
Description
Technical field
The present invention relates to mechanical structure technical field, in particular, relate to a kind of electrical appliance kit.
Background technology
The structure of usual electrical appliance kit is square irony structure, as shown in Figure 1, in order to ventilate, dispelling the heat consideration, usually on shell, is provided with slot 01.
When being placed on the coil in electrical appliance kit (such as reactor winding) and being connected with high frequency 150K ~ 300MHz signal wave, because slot 01 can not be differentiated and filtering disturbing wave or clutter, thus make the interference signal of coil radiation can freely by slot 01, and then to responsive electrical equipment generation interference around, affect its work.When carrying out EMC (ElectroMagneticCompatibility electromagnetic compatibility) performance test to complete machine, interference signal can produce a very large impact test result, thus is unfavorable for the raising of product quality.
Summary of the invention
In view of this, the invention provides a kind of electrical appliance kit, to realize ensureing, under the prerequisite of ventilating and dispelling the heat, effectively to shield interference signal, reduce the interference to other electrical equipment, improve the EMC performance of complete machine.
A kind of electrical appliance kit, comprising: box body body and the electrical appliance kit upper cover plate be arranged on described box body body, described box body body is provided with multiple circular port.
Preferably, multiple described circular port equidistantly distributes in the horizontal direction.
Preferably, the side plate that described box body body comprises base plate and is connected with described base plate, multiple described circular port is arranged on described side plate.
Preferably, multiple described circular port is uniformly distributed on described side plate.
Preferably, the open end of described box body body is provided with to in-flanges.
Preferably, described flange and described box body body are formed in one structure.
Preferably, described flange is irony flange.
As can be seen from above-mentioned technical scheme, the invention provides a kind of electrical appliance kit, the basis of existing electrical appliance kit adopts circular port replace slot, be metal material due to electrical appliance kit and there is certain thickness, therefore, each circular port forms a circular waveguide.Waveguide is a kind of high pass filter for electromagnetic wave, there is the cut-off frequency determined, when electromagnetic interfering frequency is lower than this cut-off frequency, electromagnetic wave is not just by waveguide, so by the cut-off frequency of circular waveguide being set the frequency higher than interference signal, just can realize, to effective shielding of this interference signal, reducing the interference to other electrical equipment, improve the EMC performance of complete machine.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The structural representation of Fig. 1 a kind of electrical appliance kit disclosed in prior art embodiment;
The structural representation of Fig. 2 a kind of electrical appliance kit disclosed in the embodiment of the present invention;
Fig. 3 a disclosed in the embodiment of the present invention a kind of rectangle aperture to the quantitative effect schematic diagram of electrical appliance kit case surface CURRENT DISTRIBUTION;
Fig. 3 b disclosed in the embodiment of the present invention a kind of rectangle aperture to the quantitative effect schematic diagram of electrical appliance kit case surface CURRENT DISTRIBUTION;
Fig. 3 c disclosed in the embodiment of the present invention a kind of circular aperture to the quantitative effect schematic diagram of electrical appliance kit case surface CURRENT DISTRIBUTION;
The simulation result curve chart of Fig. 4 a kind of emulation of the screen effect to slot and circular port disclosed in the embodiment of the present invention;
The structural representation of Fig. 5 another kind of electrical appliance kit disclosed in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the invention discloses a kind of electrical appliance kit, to realize ensureing, under the prerequisite of ventilating and dispelling the heat, effectively to shield interference signal, reduce the interference to other electrical equipment, improve the EMC performance of complete machine.
See Fig. 2, a kind of structural representation of electrical appliance kit disclosed in the embodiment of the present invention, the electrical appliance kit upper cover plate 12 that electrical appliance kit comprises box body body 11 and is arranged on box body body 11, box body body 11 is provided with multiple circular port 02.
Can find out, the present invention adopts circular port 02 to replace slot 01 on the basis of existing electrical appliance kit, is metal material and has certain thickness due to electrical appliance kit, and therefore, each circular port 02 forms a circular waveguide.Waveguide is a kind of high pass filter for electromagnetic wave, there is the cut-off frequency determined, when electromagnetic interfering frequency is lower than this cut-off frequency, electromagnetic wave is not just by waveguide, so by the cut-off frequency of circular waveguide being set the frequency higher than interference signal, just can realize, to effective shielding of this interference signal, reducing the interference to other electrical equipment, improve the EMC performance of complete machine.
It will be appreciated by persons skilled in the art that in the shape of electrical appliance kit housing openings, long and wide ratio is more close to 1, and shield effectiveness is better.Because circle is a centrosymmetric image, its length and wide ratio are 1, and therefore, from this point of view, circular port is for slot, and shield effectiveness increases greatly.
The present invention is for further illustrating circular port for slot, and shield effectiveness increases greatly, additionally provides following embodiment:
See Fig. 3 a, disclosed in the embodiment of the present invention, a kind of rectangle aperture is to the quantitative effect schematic diagram of electrical appliance kit case surface CURRENT DISTRIBUTION, can find out, when the long limit of slot perpendicular to interference signal on shell during faradic direction, induced electricity fails to be convened for lack of a quorum and is interrupted suddenly, causes shield effectiveness acutely to decline.
See Fig. 3 b, disclosed in another embodiment of the present invention, a kind of rectangle aperture is to the quantitative effect schematic diagram of electrical appliance kit case surface CURRENT DISTRIBUTION, can find out, when the long limit of slot is parallel to interference signal on shell during faradic direction, slot for faradic impact comparatively Fig. 3 a impact diminish.
See Fig. 3 c, a kind of circular aperture disclosed in another embodiment of the present invention, to the quantitative effect schematic diagram of electrical appliance kit case surface CURRENT DISTRIBUTION, can be found out, compare in Fig. 3 a and Fig. 3 b, Fig. 3 c minimum on faradic impact, therefore shield effectiveness is best.
It should be noted that, in Fig. 3 a, Fig. 3 b and Fig. 3 c, the slot gross area is equal with the circular port gross area, and to ensure that the contrast test of slot and circular port is carried out under the equal heat condition of electrical appliance kit, and protecting sheathing perforate does not affect electrical appliance kit heat radiation.
It should be noted that, the present invention adopts circular port comparatively slot for illustrating further electrical appliance kit, shield effectiveness increases greatly, and the present invention also adopts the shield effectiveness of three-dimensional structure electromagnetic field simulation software AnsoftHFSS to circular port and slot to emulate, specific as follows:
Set up radiative frequency span to be the excitation of 150K ~ 300MHz ripple port in electrical appliance kit center, ripple port is actuated to the body surface perfact conductor border that background is connected, do not have energy to pass in and out, ripple port is arranged on this body surface, the window that an energy flows to/flows out is provided.In order to simulate the radiation boundary condition of open free space when Analysis on Selecting radiation, scattering class problem.Simulation result is specifically see Fig. 4, wherein, abscissa is frequency, unit MHz, ordinate is screen effect, and unit dB can obviously be found out by simulation result, the shield effectiveness 001 of circular port significantly better than the shield effectiveness 002 of slot on whole frequency band 150K ~ 300MHz, can roughly have the difference of 30 ~ 40dB.
Preferably, multiple circular ports 02 that box body body 11 is provided with equidistantly distribute in the horizontal direction.
The side plate that box body body 11 comprises base plate and is connected with this base plate, multiple circular port 02 is arranged on side plate.For making electrical appliance kit have good shield effectiveness and radiating effect, multiple circular port 02 is uniformly distributed on side plate.
For optimizing above-described embodiment further, see Fig. 5, a kind of structural representation of electrical appliance kit disclosed in another embodiment of the present invention, with embodiment illustrated in fig. 2 unlike, the openend of box body body 11 is provided with to in-flanges 03.
The present invention is for better to strengthen shield effectiveness, flange processing mode is adopted at the openend of box body body 11, thus effectively increase box body body 11 and the contact area of electrical appliance kit upper cover plate 12, strengthen the sealing effectiveness of whole electrical appliance kit, thus further enhance shield effectiveness.
Preferably, flange 03 and box body body 11 are formed in one structure.
Flange 03 is identical material with box body body 11, is irony.
Finally, also it should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. an electrical appliance kit, is characterized in that, comprising: box body body and the electrical appliance kit upper cover plate be arranged on described box body body, described box body body is provided with multiple circular port.
2. electrical appliance kit according to claim 1, is characterized in that, multiple described circular port equidistantly distributes in the horizontal direction.
3. electrical appliance kit according to claim 1, is characterized in that, the side plate that described box body body comprises base plate and is connected with described base plate, and multiple described circular port is arranged on described side plate.
4. electrical appliance kit according to claim 3, is characterized in that, multiple described circular port is uniformly distributed on described side plate.
5. electrical appliance kit according to claim 1, is characterized in that, the open end of described box body body is provided with to in-flanges.
6. electrical appliance kit according to claim 5, is characterized in that, described flange and described box body body are formed in one structure.
7. electrical appliance kit according to claim 5, is characterized in that, described flange is irony flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510741951.9A CN105228397A (en) | 2015-11-02 | 2015-11-02 | A kind of electrical appliance kit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510741951.9A CN105228397A (en) | 2015-11-02 | 2015-11-02 | A kind of electrical appliance kit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105228397A true CN105228397A (en) | 2016-01-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510741951.9A Pending CN105228397A (en) | 2015-11-02 | 2015-11-02 | A kind of electrical appliance kit |
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| Country | Link |
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| CN (1) | CN105228397A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2409749Y (en) * | 1999-12-08 | 2000-12-06 | 杨继深 | Non-inductive isolation interference filtering array board |
| US20040118581A1 (en) * | 2001-04-20 | 2004-06-24 | Kopf Dale R | Electromagnetic interference shield |
| CN102281747A (en) * | 2010-06-10 | 2011-12-14 | 鸿富锦精密工业（深圳）有限公司 | Case |
| CN102724858A (en) * | 2012-06-13 | 2012-10-10 | 华为技术有限公司 | Plug-in frame and shielding rear panel thereof |
| CN205071537U (en) * | 2015-11-02 | 2016-03-02 | 珠海格力电器股份有限公司 | An electric appliance box |
-
2015
- 2015-11-02 CN CN201510741951.9A patent/CN105228397A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2409749Y (en) * | 1999-12-08 | 2000-12-06 | 杨继深 | Non-inductive isolation interference filtering array board |
| US20040118581A1 (en) * | 2001-04-20 | 2004-06-24 | Kopf Dale R | Electromagnetic interference shield |
| CN102281747A (en) * | 2010-06-10 | 2011-12-14 | 鸿富锦精密工业（深圳）有限公司 | Case |
| CN102724858A (en) * | 2012-06-13 | 2012-10-10 | 华为技术有限公司 | Plug-in frame and shielding rear panel thereof |
| CN205071537U (en) * | 2015-11-02 | 2016-03-02 | 珠海格力电器股份有限公司 | An electric appliance box |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160106 |
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| RJ01 | Rejection of invention patent application after publication |