CN108934153A - A kind of filter - Google Patents
A kind of filter Download PDFInfo
- Publication number
- CN108934153A CN108934153A CN201811112194.9A CN201811112194A CN108934153A CN 108934153 A CN108934153 A CN 108934153A CN 201811112194 A CN201811112194 A CN 201811112194A CN 108934153 A CN108934153 A CN 108934153A
- Authority
- CN
- China
- Prior art keywords
- layer
- thermally conductive
- conductive sheet
- filter
- heat
- 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
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 239000002131 composite material Substances 0.000 claims description 30
- 230000017525 heat dissipation Effects 0.000 abstract description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 80
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 28
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 23
- 229910000859 α-Fe Inorganic materials 0.000 description 22
- 239000011248 coating agent Substances 0.000 description 16
- 238000000576 coating method Methods 0.000 description 16
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 15
- 238000002360 preparation method Methods 0.000 description 15
- 239000012047 saturated solution Substances 0.000 description 14
- 229910052938 sodium sulfate Inorganic materials 0.000 description 14
- 235000011152 sodium sulphate Nutrition 0.000 description 14
- 239000000843 powder Substances 0.000 description 13
- 229920002545 silicone oil Polymers 0.000 description 13
- 239000008187 granular material Substances 0.000 description 12
- 239000004519 grease Substances 0.000 description 12
- 229920001296 polysiloxane Polymers 0.000 description 12
- 239000000243 solution Substances 0.000 description 12
- 235000010469 Glycine max Nutrition 0.000 description 10
- 244000068988 Glycine max Species 0.000 description 10
- 239000000787 lecithin Substances 0.000 description 10
- 235000010445 lecithin Nutrition 0.000 description 10
- 150000001875 compounds Chemical class 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- JLPULHDHAOZNQI-ZTIMHPMXSA-N 1-hexadecanoyl-2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phosphocholine Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC(=O)CCCCCCC\C=C/C\C=C/CCCCC JLPULHDHAOZNQI-ZTIMHPMXSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229940083466 soybean lecithin Drugs 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- WBZKQQHYRPRKNJ-UHFFFAOYSA-L disulfite Chemical compound [O-]S(=O)S([O-])(=O)=O WBZKQQHYRPRKNJ-UHFFFAOYSA-L 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 2
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical class [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001175 calcium sulphate Substances 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000002508 compound effect Effects 0.000 description 1
- 239000011231 conductive filler Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- JKGITWJSGDFJKO-UHFFFAOYSA-N ethoxy(trihydroxy)silane Chemical compound CCO[Si](O)(O)O JKGITWJSGDFJKO-UHFFFAOYSA-N 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
- H05K9/0015—Gaskets or seals
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention discloses a kind of filters, including bottom plate, filter cabinet is connected with above bottom plate, pin is provided at left and right sides of filter cabinet, filter interior is provided with heat dissipating layer and shielded layer, shielded layer is internally provided with circuit element, pin passes through filter cabinet and connect with circuit element, heat dissipating layer includes the first thermally conductive sheet and the second thermally conductive sheet, heat-conducting layer is provided among first thermally conductive sheet and the second thermally conductive sheet, through-hole is offered among heat-conducting layer, second thermally conductive sheet right side opening is equipped with air inlet, venthole is offered on the left of second thermally conductive sheet, internal cavity is provided among first thermally conductive sheet and heat-conducting layer, external cavity is provided among second thermally conductive sheet and heat-conducting layer, second thermally conductive sheet outer surface is connected with radiating fin, insulating layer inner surface is connected with conductive layer, the quadrangle of conductive layer is connected with electromagnetic sealing liner；It may be implemented the heat dissipation of greater efficiency and has preferable shielding properties.
Description
Technical field
The present invention relates to filter fields, more specifically to a kind of with radiator structure and with function of shielding
Filter.
Background technique
Filter is the device or circuit that a kind of pair of signal has processing to act on.As the continuous development of electronic market is also more next
More is produced and used extensively.Filter is broadly divided into active filter and passive filter.Main function is to allow useful signal
As zero-decrement as possible to pass through, as big as possible to garbage signal reflection.Generally there are two port, an input letters for filter
Number, an output signal, can choose a square wave group or compound wave of making an uproar by filter using this characteristic, and obtain one
The sine wave of a specific frequency.The function of filter is exactly that the signal of a certain component frequency is allowed smoothly to pass through, and other one
For the signal of component frequency then by biggish inhibition, it is substantially a frequency selection circuit.
Filter housing in the prior art uses general metal shell, and no radiator structure is easy using lower for a long time
A large amount of heat is generated, the service life of filter itself is reduced, the shielding properties of filter entirety is poor, is easy by the external world
Electromagnetic signal interference.
Summary of the invention
1. technical problems to be solved
Aiming at the problems existing in the prior art, problem is as follows:
(1) without radiator structure；
(2) shielding properties is poor.
2. technical solution
To solve the above problems, the present invention adopts the following technical scheme that.
A kind of filter, including bottom plate, the bottom plate top are fixedly connected with filter cabinet, and the filter cabinet is left
Right two sides are evenly spaced to be provided with several pins, and the filter interior is provided with heat dissipating layer and shielded layer,
The shielded layer is fixedly connected on heat dissipating layer inner surface, and the shielded layer is internally provided with circuit element, and the circuit element is solid
Surely it is connected to above bottom plate, the pin passes through filter cabinet and circuit element is electrically connected, and the heat dissipating layer includes first
Thermally conductive sheet and the second thermally conductive sheet, are provided with heat-conducting layer among first thermally conductive sheet and the second thermally conductive sheet, among the heat-conducting layer
Evenly spaced to offer several through-holes, the second thermally conductive sheet right side opening is equipped with air inlet, the second thermally conductive sheet left side
Venthole is offered, is provided with internal cavity among first thermally conductive sheet and heat-conducting layer, in second thermally conductive sheet and heat-conducting layer
Between be provided with external cavity, second thermally conductive sheet outer surface is evenly spaced to be fixedly connected with several radiating fins, the screen
Covering layer includes insulating layer, and the insulating layer inner surface is fixedly connected with conductive layer, and the quadrangle of the conductive layer is fixedly connected to
Electromagnetic sealing liner.
Preferably, filter cabinet front and rear sides are fixedly connected to mounting plate, and the mounting plate left and right sides is
Offer screw hole.
Preferably, conducting wire is provided on the inside of the conductive layer, the conductive layer and conducting wire one end are electrically connected, the conducting wire
The other end passes through composite protection layer and circuit element is electrically connected.
Preferably, the conductive layer and electromagnetic sealing liner outer surface are fixedly connected to composite protection layer, the conducting wire
The other end passes through composite protection layer and circuit element is electrically connected.
Preferably, it is provided with exhaust fan above the venthole, is fixedly connected with temperature sensor above the bottom plate,
Middle temperature sensor model number is PT100, and the exhaust fan and temperature sensor are electrically connected with circuit element.
3. beneficial effect
Compared with the prior art, the present invention has the advantages that
(1) present invention inside heat dissipating layer by being arranged the first thermally conductive sheet, the second thermally conductive sheet and radiating fin and first thermally conductive
Heat-conducting layer between piece and the second thermally conductive sheet can be shed the heat of filter box house to filtering by heat exchange pattern
Outside device cabinet, by setting internal cavity and external cavity inside heat dissipating layer, through-hole is opened up among heat-conducting layer, it is thermally conductive second
Venthole is opened up on the left of piece and right side opens up air inlet, when filter box house generates heat, interior external cavity generates the temperature difference,
The air of interior external cavity is flowed by through-hole, carries out heat dissipation of ventilating, to solve general filter without radiator structure
The problem of；
(2) conductive layer and electromagnetic sealing liner is arranged by the way that shielded layer is arranged inside heat dissipating layer in the present invention in shielded layer,
When filter works, conductive layer is connected circuit element, and then generates shielding action to extraneous electromagnetism, by being arranged in conduction
The insulating layer of layer outer surface can completely cut off conductive layer and heat dissipating layer, the generation of electric leakage accident be prevented, to solve common filter
The poor problem of wave device shielding properties.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the structural schematic diagram of filter box house of the present invention；
Fig. 3 is the structural schematic diagram of heat dissipating layer of the invention；
Fig. 4 is the structural schematic diagram of shielded layer of the invention.
Figure label explanation:
1- bottom plate；2- filter cabinet；3- pin；4- heat dissipating layer；5- shielded layer；6- circuit element；The first thermally conductive sheet of 7-；8-
Two thermally conductive sheets；9- heat-conducting layer；10- through-hole；11- air inlet；12- venthole；13- internal cavity；14- external cavity；15- heat radiating fin
Piece；16- insulating layer；17- conductive layer；18- electromagnetic sealing liner；19- mounting plate；20- screw hole；21- conducting wire；22- complex protection
Layer；23- exhaust fan；24- temperature sensor.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention；Technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description；Obviously；Described embodiments are only a part of the embodiments of the present invention；Instead of all the embodiments.It is based on
Embodiment in the present invention；It is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment；It shall fall within the protection scope of the present invention.
Fig. 1-4, a kind of filter, including bottom plate 1 are please referred to, filter cabinet 2 is fixedly connected with above bottom plate 1, is filtered
2 left and right sides of device cabinet is evenly spaced to be provided with several pins 3, and 2 inner surface of filter cabinet is provided with 4 He of heat dissipating layer
Shielded layer 5, shielded layer 5 are fixedly connected on 4 inner surface of heat dissipating layer, and shielded layer 5 is internally provided with circuit element 6, and circuit element 6 is solid
Surely it is connected to 1 top of bottom plate, pin 3 passes through filter cabinet 2 and circuit element 6 is electrically connected, and heat dissipating layer 4 includes first thermally conductive
It is provided with heat-conducting layer 9 among piece 7 and the second thermally conductive sheet 8, the first thermally conductive sheet 7 and the second thermally conductive sheet 8,9 midfeather of heat-conducting layer is equal
Even offers several through-holes 10, and 8 right side opening of the second thermally conductive sheet is equipped with air inlet 11, offers out on the left of the second thermally conductive sheet 8
It is provided with internal cavity 13 among stomata 12, the first thermally conductive sheet 7 and heat-conducting layer 9, is provided among the second thermally conductive sheet 8 and heat-conducting layer 9
External cavity 14,8 outer surface of the second thermally conductive sheet is evenly spaced to be fixedly connected with several radiating fins 15, and shielded layer 5 includes exhausted
Edge layer 16,16 inner surface of insulating layer are fixedly connected with conductive layer 17, and the quadrangle of conductive layer 17 is fixedly connected to electromagnetic sealing lining
Pad 18.
1 front and rear sides of filter cabinet are fixedly connected to mounting plate 19, and 19 left and right sides of mounting plate offers screw hole
20, filter can be fixed on device by screw by setting mounting plate 19 and screw hole 20, be arranged on the inside of conductive layer 17
There is conducting wire 21, conductive layer 17 and 21 one end of conducting wire are electrically connected, and 21 other end of conducting wire and circuit element 6 are electrically connected, by leading
Conductive layer 17 and circuit element 6 are electrically connected by line 21, realize that conductive layer 17 is powered, outside conductive layer 17 and electromagnetic sealing liner 18
Surface is fixedly connected to composite protection layer 22, and 21 other end of conducting wire passes through composite protection layer 22 and circuit element 6 is electrically connected,
Composite protection layer 22 can stop circuit element 6 directly to contact with conductive layer 17 and electromagnetic sealing liner 18, to protect circuit elements
Part 6 is provided with exhaust fan 23 above venthole 12, temperature sensor 24 is fixedly connected with above bottom plate 1, wherein temperature sensor
24 model PT100, exhaust fan 23 and temperature sensor 24 are electrically connected with circuit element 6, when temperature sensor 24 detects
When temperature is higher in filter cabinet 1, exhaust fan 23 is connected, the air between external cavity 14 and internal cavity 13 is accelerated to flow speed
Degree improves radiating efficiency.
Working principle: screw is passed through the screw hole 20 on mounting plate 19 and is threadedly coupled fixation with device, will filtered by the first step
The pin 3 and device of 2 left and right sides of device cabinet are electrically connected, second step, when filter is started to work, circuit element 6 and pin 3
Conducting, circuit element 6 is electrically connected by the conductive layer 17 inside conducting wire 21 and shielded layer 5, in conductive layer 17 and electromagnetic sealing
Under the action of liner 18,2 pairs of filter cabinet extraneous electromagnetic signals produce certain shielding action, and third step works as filter
When work, certain heat can be generated in filter cabinet 2, when the heat generated inside filter cabinet 2 is smaller, heat dissipating layer
Internal cavity 13 inside 4 and the temperature difference that external cavity 14 generates are smaller, pass through the first thermally conductive sheet 7, the second thermally conductive sheet 8 and radiating fin
15 with the modes of heat transfer by outside heat transfer filter cabinet 2 inside to filter cabinet 2, due to internal cavity 13 with outside
Cavity 14 has certain temperature difference, so that the air in external cavity 14 is exchanged by through-hole 10 with the air of internal cavity 13, into
One step accelerates shedding for 2 internal heat of filter cabinet, when the heat that filter internal generates is more, the temperature of 1 top of bottom plate
When degree sensor 24 detects that 2 internal temperature of filter cabinet is higher, the exhaust fan 23 being arranged at venthole 12 will turn on, lead to
Crossing exhaust fan 23 accelerates the air between internal cavity 13 and external cavity 14 to flow, and accelerates filter heat dissipation；By being arranged in conduction
The insulating layer 16 of 17 outer surface of layer, which can completely cut off conductive layer 17 and heat dissipating layer 4, come, and prevent electric leakage accident, by
Conductive layer 17 and electromagnetic sealing pad 18 inner surfaces setting composite protection layer 22 and can separate conductive layer 17 and circuit element 6,
To protect circuit element 6.
For better heat dissipation effect, shielded layer 5 is magnetic screen heat dissipating silicone grease coating, using load ferrite nano material
Aluminium oxide be filler prepares coating, the exclusive metallic crystalline structure of powder body material makes it just be easy to shape under a small amount of additive amount
At conductive network, and the excellent electric conductivity of compound nickel aluminium and ferritic magnetism combine, and coating can be made to be provided simultaneously with electrical loss
And magnetic loss, it realizes the impedance matching of electromagnetic absorption, widens absorption frequency range, improve the absorbing property of single conductive filler；In addition,
In the water-oil interface junction of sodium sulphate saturated solution and silicone oil, ethyl orthosilicate is reacted with water generates poly silicic acid, not only may be used
To effectively improve the mechanical property of emulsifying film, avoid oozing out etching electronic prototype part because of sodium sulphate saturated solution, and positive silicic acid
Ethyl ester reacts consumption part water with water, makes sodium sulphate saturated solution that a small amount of crystalline solid be precipitated, is conducive to sulphur in temperature elevation process
Sour sodium rapid crystallization is precipitated, and forms the export that crystalline framework is conducive to heat, further promotes leading for electromagnetic shielding silicone grease coating
Hot property, so that such composite coating structure guarantees that material is provided simultaneously with good thermal diffusivity and excellent electromagnetic wave shielding.
Embodiment 1
A kind of preparation method of magnetic screen heat dissipating silicone grease coating, it is characterised in that method includes the following steps:
Step 1 weighs 10 parts of methyl-silicone oils, 3 parts of sodium sulphate saturated solutions, 3 parts of aluminium oxide/Ni ferrite composite powder by weight
Body, 3 parts of soybean lecithins and 1 part of ethyl orthosilicate are spare；
Methyl-silicone oil and ethyl orthosilicate are placed in single-necked flask by step 2, and under the conditions of revolving speed is 600r/min, stirring is mixed
50min is closed, mixed liquor is obtained；
Gained mixed liquor and aluminium oxide/Ni ferrite composite granule are placed in batch mixer by step 3, in revolving speed be 1200r/min
Under the conditions of, high-speed stirred 50min；
Sodium sulphate saturated solution and soybean lecithin is added in step 4 into batch mixer again, under the conditions of revolving speed is 1200r/min, after
Continue high-speed stirred 50min to get magnetic screen heat dissipating silicone grease coating；
The aluminium oxide/Ni ferrite composite granule the preparation method is as follows:
Step 1, title remove 2.8 parts of FeCl3·6H2O and 1.8 part of NiCl2·6H2O is dissolved in 30 parts of water and is configured to solution, is added 12
In the alumina fluid dispersion of part 15g/L, ultrasonic 30min；
Step 2 adjusts pH=11 with sodium hydroxide solution, is eventually adding 1 part of reducing agent Na2S2O3·5H2O is packed into reaction kettle, close
Envelope, is placed in baking oven, 150 DEG C of reaction 15h；
Solution after reaction is placed in Rotary Evaporators by step 3 again, is 120 DEG C, pressure 400kPa in temperature, revolving speed is
Under the conditions of 60r/min, it is evaporated under reduced pressure 30min, obtains aluminium oxide/Ni ferrite composite granule；
Aluminium oxide/Ni ferrite composite granule is then placed in baking oven by step 4, under the conditions of temperature is 110 DEG C, dry 2h,
Obtain dry aluminium oxide/Ni ferrite composite granule；
The alumina fluid dispersion is by 2 parts of aluminium oxide, and 1 part of silane resin acceptor kh-550 and 12 parts of dehydrated alcohols are placed in beaker
In, in temperature be 80 DEG C, revolving speed be 600r/min under the conditions of, heating stirring 50min；Then it is added dropwise with rubber head dropper into beaker
The sodium hydroxide solution that mass fraction is 10% adjusts pH=10, then places the beaker in ultrasonic disperse instrument, in frequency be 65kHz item
Under part, ultrasonic disperse 50min；
Embodiment 2
Step 1 weighs 8 parts of methyl-silicone oils, 3 parts of sodium sulphate saturated solutions, 3 parts of aluminium oxide/Ni ferrite composite powder by weight
Body, 3 parts of soybean lecithins and 1 part of ethyl orthosilicate are spare；Remaining step is the same as embodiment 1.
Embodiment 3
Step 1 weighs 6 parts of methyl-silicone oils, 3 parts of sodium sulphate saturated solutions, 3 parts of aluminium oxide/Ni ferrite composite powder by weight
Body, 3 parts of soybean lecithins and 1 part of ethyl orthosilicate are spare；
Embodiment 4
Step 1 weighs 4 parts of methyl-silicone oils, 3 parts of sodium sulphate saturated solutions, 3 parts of aluminium oxide/Ni ferrite composite powder by weight
Body, 3 parts of soybean lecithins and 1 part of ethyl orthosilicate are spare；
Embodiment 5
Step 1 weighs 2 parts of methyl-silicone oils, 3 parts of sodium sulphate saturated solutions, 3 parts of aluminium oxide/Ni ferrite composite powder by weight
Body, 3 parts of soybean lecithins and 1 part of ethyl orthosilicate are spare；
Embodiment 6
Step 1, to weigh 10 parts of methyl-silicone oils, 3 parts of sodium sulphate saturated solutions, 2.5 parts of aluminium oxide/Ni ferrites by weight compound
Powder, 3 parts of soybean lecithins and 1 part of ethyl orthosilicate are spare；
Embodiment 7
Step 1 weighs 10 parts of methyl-silicone oils, 3 parts of sodium sulphate saturated solutions, 2 parts of aluminium oxide/Ni ferrite composite powder by weight
Body, 3 parts of soybean lecithins and 1 part of ethyl orthosilicate are spare；
Embodiment 8
Step 1, to weigh 10 parts of methyl-silicone oils, 3 parts of sodium sulphate saturated solutions, 1.5 parts of aluminium oxide/Ni ferrites by weight compound
Powder, 3 parts of soybean lecithins and 1 part of ethyl orthosilicate are spare；
Embodiment 9
Step 1 weighs 10 parts of methyl-silicone oils, 3 parts of sodium sulphate saturated solutions, 1 part of aluminium oxide/Ni ferrite composite powder by weight
Body, 3 parts of soybean lecithins and 1 part of ethyl orthosilicate are spare；
Embodiment 10
Step 1, to weigh 10 parts of methyl-silicone oils, 3 parts of sodium sulphate saturated solutions, 0.5 part of aluminium oxide/Ni ferrite by weight compound
Powder, 3 parts of soybean lecithins and 1 part of ethyl orthosilicate are spare；
Reference examples 1
It is with 1 difference of embodiment: in magnetic screen heat dissipating silicone grease coating preparation step 1, is replaced with the aluminium oxide of equivalent compound
Powder, remaining step are identical with embodiment 1.
Reference examples 2
It is with 1 difference of embodiment: in magnetic screen heat dissipating silicone grease coating preparation step 1,1 part of aluminium oxide, 1 part of aluminium oxide and 1
Part nickel oxide substitutes 3 parts of aluminium oxide/Ni ferrite composite granule, remaining step is identical with embodiment 1.
Reference examples 3
It is with 1 difference of embodiment: in magnetic screen heat dissipating silicone grease coating preparation step 1, is taken with equivalent saturation calcium sulphate soln
Generation saturation metabisulfite solution, remaining step are identical with embodiment 1.
Reference examples 4
It is with 1 difference of embodiment: in magnetic screen heat dissipating silicone grease coating preparation step 1, is taken with equivalent saturated sodium carbonate solution
Generation saturation metabisulfite solution, remaining step are identical with embodiment 1.
Reference examples 5
It is with 1 difference of embodiment: in magnetic screen heat dissipating silicone grease coating preparation step 1, soybean lecithin and ethyl orthosilicate matter
For amount than 1:1, remaining step is identical with embodiment 1.
Reference examples 6
It is with 1 difference of embodiment: in magnetic screen heat dissipating silicone grease coating preparation step 1, soybean lecithin and ethyl orthosilicate matter
For amount than 1:3, remaining step is identical with embodiment 1.
Reference examples 7
It is with 1 difference of embodiment: in aluminium oxide/Ni ferrite composite granule preparation step 1, uses 4.6 parts of one pack systems
FeCl3·6H2O；Remaining step is identical with embodiment 1.
Reference examples 8
It is with 1 difference of embodiment: in aluminium oxide/Ni ferrite composite granule preparation step 1, uses 4.6 parts of one pack systems
NiCl2·6H2O；Remaining step is identical with embodiment 1.
Reference examples 9
It is with 1 difference of embodiment: in aluminium oxide/Ni ferrite composite granule preparation step 2, adjusts solution PH=7, remaining
Step is identical with embodiment 1.
Reference examples 10
It is with 1 difference of embodiment: in aluminium oxide/Ni ferrite composite granule preparation step 2, adjusts solution PH=3, remaining
Step is identical with embodiment 1.
The sample that specification is 22mm × 10mm thickness 1mm is tested in the electromagnetic shielding performance of 8-12GHz frequency range.Radio frequency electrical
Magnetic field shielding efficiency is measured using Agilent 4396B network/spectrum/impedance analyzer, using SJ20524-1995 " material
Expect shield effectiveness test method "；Thermal conductivity is tested by III thermal conductivity factor instrument of DRL-, and method is heat flow method, and testing standard is
MIL-I-49456A；It is as shown in the table for test result
The experimental results showed that the magnetic screen heat dissipating silicone grease coating of preparation has good Magnetic Shielding Effectiveness, it is certain in test condition
When, shield effectiveness (SE) is higher, and Magnetic Shielding Effectiveness is better, otherwise poorer；In methyl-silicone oil, aluminium oxide/Ni ferrite composite powder
When body mass ratio is 10:3, other ingredients are fixed, and preparation effect is best, and reference examples 1 to reference examples 3 illustrate that composite granule compares
Material magnetic shield performance influences very big；Reference examples 4 illustrate that the compound heat dissipation to material for being saturated metabisulfite solution is affected；It is right
5 to the change soybean lecithin of reference examples 6 and ethyl orthosilicate mass ratio as usual, so that water-oil interface property changes the dispersion effect of filler
Fruit is deteriorated, and Magnetic Shielding Effectiveness is still bad；Reference examples 7 prepare composite granule using the metal salt solution of one-component to reference examples 8,
Shield effectiveness is obviously deteriorated, and the nickel or iron of instruction sheet one are more preferable not as good as the compound effect of the two；Reference examples 9 to reference examples 10 reduce
The pH value of reduction reaction system, the heat dissipation of coating and Magnetic Shielding Effectiveness are all very poor, illustrate reaction be more suitable under alkaline system into
Row；Therefore there is good thermal diffusivity and effectiveness using magnetic screen heat dissipating silicone grease coating prepared by the present invention.
Claims (5)
1. a kind of filter, including bottom plate (1), it is characterised in that: be fixedly connected with filter cabinet above the bottom plate (1)
(2), evenly spaced at left and right sides of the filter cabinet (2) to be provided with several pins (3), the filter cabinet
(2) inner surface is provided with heat dissipating layer (4) and shielded layer (5), and the shielded layer (5) is fixedly connected on heat dissipating layer (4) inner surface, institute
It states shielded layer (5) to be internally provided with circuit element (6), the circuit element (6) is fixedly connected on above bottom plate (1), described to draw
Foot (3) passes through filter cabinet (2) and circuit element (6) and is electrically connected, the heat dissipating layer (4) include the first thermally conductive sheet (7) and
Heat-conducting layer (9), the heat-conducting layer are provided among second thermally conductive sheet (8), first thermally conductive sheet (7) and the second thermally conductive sheet (8)
(9) midfeather uniformly offers several through-holes (10), and the second thermally conductive sheet (8) right side opening is equipped with air inlet (11),
It offers venthole (12) on the left of second thermally conductive sheet (8), is provided among first thermally conductive sheet (7) and heat-conducting layer (9)
Internal cavity (13), second thermally conductive sheet (8) and heat-conducting layer (9) centre are provided with external cavity (14), second thermally conductive sheet (8)
Outer surface is evenly spaced to be fixedly connected with several radiating fins (15), and the shielded layer (5) includes insulating layer (16), described
Insulating layer (16) inner surface is fixedly connected with conductive layer (17), and the quadrangle of the conductive layer (17) is fixedly connected to electromagnetic sealing
It pads (18).
2. according to claim 1 a kind of with radiator structure and with the filter of function of shielding, it is characterised in that: institute
It states filter cabinet (1) front and rear sides to be fixedly connected to mounting plate (19), be offered at left and right sides of the mounting plate (19)
Screw hole (20).
3. a kind of filter according to claim 1, it is characterised in that: be provided with conducting wire on the inside of the conductive layer (17)
(21), the conductive layer (17) and conducting wire (21) one end are electrically connected, and conducting wire (21) other end and circuit element (6) are electrically
Connection.
4. according to claim 1 with a kind of filter described in 3, it is characterised in that: the conductive layer (17) and electromagnetic sealing lining
Pad (18) outer surface be fixedly connected to composite protection layer (22), conducting wire (21) other end pass through composite protection layer (22) with
Circuit element (6) is electrically connected.
5. a kind of filter according to claim 1, it is characterised in that: be provided with exhaust fan above the venthole (12)
(23), temperature sensor (24) are fixedly connected with above the bottom plate (1), wherein temperature sensor (24) model PT100, institute
Exhaust fan (23) and temperature sensor (24) is stated to be electrically connected with circuit element (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811112194.9A CN108934153A (en) | 2018-09-25 | 2018-09-25 | A kind of filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811112194.9A CN108934153A (en) | 2018-09-25 | 2018-09-25 | A kind of filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108934153A true CN108934153A (en) | 2018-12-04 |
Family
ID=64443885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811112194.9A Pending CN108934153A (en) | 2018-09-25 | 2018-09-25 | A kind of filter |
Country Status (1)
| Country | Link |
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| CN (1) | CN108934153A (en) |
Cited By (4)
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|---|---|---|---|---|
| CN109712777A (en) * | 2019-02-26 | 2019-05-03 | 中国科学院上海微系统与信息技术研究所 | The preparation method of filter, test macro and filter |
| CN110494029A (en) * | 2019-08-27 | 2019-11-22 | 山东浪潮人工智能研究院有限公司 | The shielding case and arbitrary waveform generator of board for arbitrary waveform generator |
| CN113098014A (en) * | 2021-04-20 | 2021-07-09 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | High-power broadband power filter |
| CN116545263A (en) * | 2022-03-31 | 2023-08-04 | 安徽奥源电子科技有限公司 | High quick charge source of security |
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