CN106332498B - Closed card cage radiator structure, card cage and heat dissipating method including the structure - Google Patents
Closed card cage radiator structure, card cage and heat dissipating method including the structure Download PDFInfo
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- CN106332498B CN106332498B CN201510376331.XA CN201510376331A CN106332498B CN 106332498 B CN106332498 B CN 106332498B CN 201510376331 A CN201510376331 A CN 201510376331A CN 106332498 B CN106332498 B CN 106332498B
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Abstract
The invention discloses a kind of closed card cage radiator structures, card cage and heat dissipating method including the structure, for radiating to the printed circuit board in closed card cage, radiator structure includes: the card cage cylindrical body being made of after-frame, front frame, lower wall, upper wall；Thermally conductive cover, heating column is provided on thermally conductive cover, and every piece of printed circuit board forms a bound cell with thermally conductive cover；The guide rail of card cage cylindrical body inner upper wall and lower wall is set, docks plug guiding for realizing between bound cell and the socket that card cage cylindrical body rear portion is arranged in, while the heat of thermally conductive cover being oriented to the cabinet of closed card cage.The technical issues of present invention is able to solve existing cabinet equipment can not meet the requirement of leakproofness and heat dissipation simultaneously, with high costs, reliability is low, anti-electromagnetic interference capability is weak, and cabinet is also easy to produce buckling deformation.
Description
Technical field
The present invention relates to a kind of electrical equipment field of radiating, more particularly, to a kind of heat dissipation applied to closed card cage
Structure, card cage and heat dissipating method including the structure.
Background technique
Card cage, or referred to as subrack, cabinet are a kind of common electronic devices structure schemes, for accommodating band grafting
The printed circuit board of element and the structural unit of plug-in unit.Each printed circuit board or plug-in unit itself are again for card cage
Independent unit one by one can freely plug replacement, have very without influencing other parts, therefore in field of electronics
Broad application prospect.
In the prior art, although closed card cage can protect the electronic component inside equipment well, simultaneously
Anti-electromagnetic interference capability is very strong, but since its cabinet is using totally enclosed type design, necessarily causes its heat dissipation effect bad.Always
Since, in order to solve the heat dissipation problem of closed box house electronic component, generally using fan is forced-ventilated or water-cooled dissipates
Thermal structures design.But there is also following technical problems for the radiator structure of closed cabinet equipment in the prior art:
(1) existing cabinet equipment can not meet the requirement of leakproofness and heat dissipation simultaneously；
(2) existing closed cabinet equipment carries out finishing production part by numerical control machining center, and raw material needs spy
Not customized blank, and processing capacity is big, the period is longer；
(3) existing closed cabinet equipment is radiated using heat exchanger or water-cooled plate, and structure is complicated, with high costs；
(4) existing closed cabinet equipment uses fan or water-cooling, and reliability is lower；
(5) existing closed cabinet equipment is because the reasons such as rising-heat contracting-cold are easy to produce the buckling deformation of cabinet plate.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of closed card cage radiator structures, inserting including the structure
Part case and heat dissipating method, the requirement of leakproofness and heat dissipation, with high costs, reliability can not be met simultaneously by solving existing cabinet equipment
Low, the technical issues of anti-electromagnetic interference capability is weak, and cabinet is also easy to produce buckling deformation.
In order to achieve the above-mentioned object of the invention, the present invention specifically provides a kind of technology reality of closed card cage radiator structure
Existing scheme, closed card cage radiator structure, for radiating to the printed circuit board in closed card cage, the heat dissipation
Structure includes:
The card cage cylindrical body being made of after-frame, front frame, lower wall, upper wall；
Thermally conductive cover, is provided with heating column on the thermally conductive cover, printed circuit board described in every piece with the thermally conductive cover shape
At a bound cell；
The guide rail of the card cage cylindrical body inner upper wall and lower wall is set, for realizing the bound cell with set
The docking plug guiding between the socket at card cage cylindrical body rear portion is set, while the heat of the thermally conductive cover being oriented to
The cabinet of the closed card cage.
Preferably, the heat of the printed circuit board is oriented to the thermally conductive cover, while the printing by the heating column
The heat of circuit board is also conducted by heat radiation, free convection mode to the thermally conductive cover, and the thermally conductive cover passes through the guide rail
The cabinet of the closed card cage is conducted heat to, then atmosphere is conducted heat to by the cabinet of the closed card cage
Complete entire radiation processes.
Preferably, the upper wall inside the card cage cylindrical body and lower wall are equipped with the strip gold of normal pitch
Belong to plate, the guide-track groove that the gap between adjacent two blocks of elongated metal plates is formed, which is used as, plugs the bound cell
The guide rail of guiding.
Preferably, the radiator structure further comprises the reinforcing rib that card cage cylindrical body outer surface is arranged in,
The reinforcing rib is used to reinforce the side wall of the card cage cylindrical body, enhances the closed card cage as radiating fin
Heat dissipation performance.
Preferably, described between the lower wall and upper wall and between the lower wall, upper wall and the after-frame, front frame
Between card cage cylindrical body and the elongated metal plate, it is formed between the card cage cylindrical body and the reinforcing rib
Metal plate seam, the metal plate seam use conduction heat sealable glue material to be filled to guarantee sealing and heat dissipation performance.
In addition the present invention also specifically provides a kind of technic relization scheme of card cage including above structure, plug-in unit luggage
It includes: door, back shroud, socket, printed circuit board and the upper radiator structure.The door is fixed in the front frame, described
Back shroud is fixed on the after-frame, and the door, back shroud and the card cage cylindrical body form closed cabinet.One piece
Or two pieces or more by the printed circuit board and it is described it is thermally conductive cover the bound cells that are formed by with setting at the cabinet rear portion
Socket grafting the inside of the card cage is set.
Preferably, the socket is arranged on the back shroud；
Preferably, the after-frame, front frame, lower wall and upper wall are all made of metal plate blanking structure.
Preferably, the upper wall in the card cage cylindrical body and lower wall are provided with elongated metal plate, the plug-in unit
The outer surface of case cylindrical body is provided with reinforcing rib, and the elongated metal plate and reinforcing rib are all made of metal plate blanking structure.
A kind of in addition technology that the present invention also specifically provides closed card cage heat dissipating method based on above structure is real
Existing scheme, closed card cage heat dissipating method, comprising the following steps:
A: the heat of printed circuit board is oriented to thermally conductive cover by heating column；
B: the heat of the printed circuit board is conducted by heat radiation, free convection mode to the thermally conductive cover simultaneously；
C: the thermally conductive cover conducts heat to the cabinet of closed card cage by guide rail, then by the closed plug-in unit
The cabinet of case conducts heat to atmosphere and completes entire radiation processes.
Preferably, the heat dissipating method further includes that the heat of the closed plug-in unit box body further passes through setting in institute
The reinforcing rib for stating box outer surface, which is conducted to atmosphere, completes entire radiation processes.
The closed card cage radiator structure provided by implementing aforementioned present invention, card cage and heat dissipation including the structure
Method has the following beneficial effects:
(1) the closed card cage radiator structure of the present invention can meet the requirement of card cage leakproofness and heat dissipation simultaneously, make
It is strong to obtain card cage globality, it is easy to reach the degree of protection of IP65, while meet high shield effectiveness and outdoor vehicles needs
Strength grade；
(2) rigidity of structure of card cage of the present invention is high because the thermal expansion coefficient difference of printed circuit board and thermally conductive cover and
A possibility that leading to box deformation, is minimum；
(3) structure of card cage of the present invention is simple, lower to required precision, mutually constrains between several main structure bodies, and
The accumulation of error is very small；
(4) contact area between the thermally conductive cover and printed wiring board of the closed card cage radiator structure of the present invention is big, connects
It is small to touch thermal resistance, therefore heat dissipation effect is preferable；
(5) the thermally conductive cover of the closed card cage radiator structure of the present invention and printed wiring board form independent shielding one by one
Unit, so that electromagnetic interference mutual between box house plug-in unit is very low；
(6) there is no air-cooled, the delicate radiator structure such as water cooling in the closed card cage radiator structure of the present invention, therefore radiate
The reliability of structure entirety is very high；
(7) the closed card cage radiator structure of the present invention and method are directly cooling to crucial heat generating spot direct construction logical
Road, so that the cooling effect at thermo-responsive position is clearly；
(8) the main building block of card cage of the present invention all uses metal plate blanking structure and bending and forming production part,
Therefore the advantage of lower cost of card cage.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described.It should be evident that the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other embodiments are obtained according to these attached drawings.
Fig. 1 is a kind of main frame structure schematic diagram of specific embodiment of card cage of the present invention；
Fig. 2 is a kind of external structure schematic diagram of specific embodiment of card cage of the present invention；
Fig. 3 is a kind of the schematic diagram of the section structure of specific embodiment of card cage of the present invention；
Fig. 4 is the structural schematic diagram of thermally conductive cover in a kind of closed specific embodiment of card cage radiator structure of the present invention；
Fig. 5 is a kind of assembling structure schematic diagram of specific embodiment of card cage of the present invention；
Fig. 6 is the structural representation of metal plate seam in a kind of closed specific embodiment of card cage radiator structure of the present invention
Figure；
Fig. 7 is a kind of radiator structure schematic diagram of specific embodiment of card cage of the present invention；
In figure: 1- after-frame, 2- front frame, 3- lower wall, 4- upper wall, 5- guide rail, 6- socket, 7- reinforcing rib, 8-, 9- printing electricity
Road plate, 10- heating column, the thermally conductive cover of 11-, 12- metal plate seam, 13- back shroud.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical scheme in the embodiment of the invention is clearly and completely described.Obviously, described embodiment is only
It is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
As shown in attached drawing 1 to attached drawing 7, the closed card cage radiator structure of the present invention, the plug-in unit including the structure are given
The specific embodiment of case and heat dissipating method, the present invention will be further explained below with reference to the attached drawings and specific examples.
As shown in attached drawing 1 to attached drawing 6, a kind of specific embodiment of closed card cage radiator structure, for closed
Printed circuit board 9 in card cage radiates, and radiator structure includes:
The card cage cylindrical body being made of after-frame 1, front frame 2, lower wall 3, upper wall 4；
Thermally conductive cover 11, thermally conductive cover are provided with heating column 10 on 11, every piece of printed circuit board 9 forms one with thermally conductive cover 11
A bound cell；
The guide rail 5 of card cage cylindrical body inner upper wall and lower wall is set, is being inserted for realizing bound cell and setting
Docking between the socket 6 at part case cylindrical body rear portion plugs guiding, while the heat of thermally conductive cover 11 is oriented to closed plug-in unit
The cabinet of case.The cabinet of closed card cage further comprises the card cage cylinder being made of after-frame 1, front frame 2, lower wall 3, upper wall 4
Shape main body, and the door 8 being fixed in front frame 2.
Wherein, as shown in Fig. 4, the heating column of multiple and different shapes and structure is provided in the medial surface of thermally conductive cover 11
10.Every piece of printed circuit board 9 all forms a unit with the heating column 10 on a thermally conductive cover 11 and thermally conductive cover 11.
The radiator structure principle of the above-mentioned specific embodiment description of the present invention are as follows: the heat of printed circuit board 9 passes through heating column
The thermally conductive cover 11 of 10 guiding, while the heat of printed circuit board 9 is also conducted by heat radiation, free convection mode to thermally conductive cover 11,
Thermally conductive cover 11 conducts heat to the cabinets of closed card cage by guide rail 5, then by closed card cage cabinet by heat
Conduction to atmosphere completes entire radiation processes.
As shown in attached drawing 1 and attached drawing 3, as a kind of typical specific embodiment of the present invention, in card cage cylindrical body
The upper wall and lower wall in portion are further equipped with the elongated metal plate of normal pitch, between adjacent two blocks of elongated metal plates
The guide-track groove that gap is formed is as the guide rail 5 for carrying out plug guiding to bound cell.The specific embodiment of the invention describes closed
Formula card cage radiator structure forms one using printed circuit board 9 and thermally conductive cover 11 and constitutes independent bound cell one by one,
Thermally conductive cover 11 absorbs the heat of printed circuit board 9, while can conduct heat to closed card cage with lower thermal resistance
Cabinet.Meanwhile thermally conductive cover 11 is contacted with the guide rail 5 of closed card cage again, independent screen unit one by one is formed, so that close
Mutual electromagnetic interference is very low between the printed circuit board 9 of enclosed card cage box house.
As shown in attached drawing 2,3 and 5, as a kind of preferable specific embodiment of the present invention, radiator structure further comprises setting
The reinforcing rib 7 in card cage cylindrical body outer surface is set, reinforcing rib 7 further uses sheet metal bending shaped structure.Reinforcing rib 7 is used
In reinforcing the side wall of card cage cylindrical body, while enhancing as radiating fin the heat dissipation performance of closed card cage.
As shown in Fig. 6, as a kind of preferable specific embodiment of the present invention, in the lower wall 3 of closed card cage and upper
Between wall 4 and between lower wall 3, upper wall 4 and after-frame 1, front frame 2, between card cage cylindrical body and elongated metal plate, insert
Metal plate seam 12 is formed further between part case cylindrical body and reinforcing rib 7, metal plate seam 12 further uses conduction heat sealable
Glue material is filled to guarantee sealing and heat dissipation performance.
As shown in attached drawing 2 and attached drawing 5, a kind of specific embodiment of card cage, comprising: door 8, socket 6, printed circuit board 9,
And radiator structure as described above.Door 8 uses board making, and is fixed by screws in front frame 2, and with card cage tubular
Main body forms closed body structure, one piece or two pieces or more the bound cell formed by printed circuit board 9 and thermally conductive cover 11
By the inside that card cage is arranged in 6 grafting of socket that cabinet rear portion is arranged in.Rear cover is further provided on after-frame 1
Plate 13, back shroud 13 can be fixed on by modes such as screw or rivet or welds on after-frame 1 or after-frame 1 and back shroud 13
It is an integral structure, socket 6 is arranged on back shroud 13.The card cage of specific embodiment of the invention description has height optimization
Structural behaviour, high electromagnetic compatibility efficiency and extremely low cost advantage.
As a kind of preferable specific embodiment of the present invention, after-frame 1, front frame 2, lower wall 3 and upper wall 4 further use metal plate
Golden blanking structure.Upper wall and lower wall inside card cage cylindrical body are provided with elongated metal plate, card cage cylindrical body
Outer surface be provided with reinforcing rib 7, elongated metal plate and reinforcing rib 7 also further use metal plate blanking structure.
As shown in the radiator structure figure of attached drawing 7, a kind of specific embodiment of closed card cage heat dissipating method, including it is following
Step:
A: the heat of printed circuit board 9 is oriented to thermally conductive cover 11 by heating column 10；
B: the heat of printed circuit board 9 is conducted by heat radiation, free convection mode to thermally conductive cover 11 simultaneously；
C: thermally conductive cover 11 conducts heat to the cabinet of closed card cage by guide rail 5, then by closed card cage
Cabinet conducts heat to atmosphere and completes entire radiation processes.
As a kind of preferable specific embodiment of the present invention, above-mentioned heat dissipating method further includes the heat of closed plug-in unit box body
Amount was further entirely radiated by the way that the conduction of reinforcing rib 7 to atmosphere (as shown in A in the attached drawing 7) completion on surface outside the enclosure is arranged
Journey.
By implementing the closed card cage radiator structure of specific embodiment of the invention description, the card cage including the structure
And heat dissipating method, following technical effect can be reached:
(1) the closed card cage radiator structure of specific embodiment of the invention description can meet card cage leakproofness simultaneously
With the requirement of heat dissipation so that card cage globality is strong, it is easy to reach the degree of protection of IP65, while meeting high shield effectiveness,
And the strength grade that outdoor vehicles need；
(2) rigidity of structure of the card cage of specific embodiment of the invention description is high, because of printed circuit board and thermally conductive cover
Thermal expansion coefficient difference and a possibility that leading to box deformation it is minimum；
(3) structure of the card cage of specific embodiment of the invention description is simple, several main structure bodies lower to required precision
Between mutually constrain, and the accumulation of error is very small；
(4) between the thermally conductive cover and printed wiring board of the closed card cage radiator structure of specific embodiment of the invention description
Contact area is big, thermal contact resistance is small, therefore heat dissipation effect is preferable；
(5) the thermally conductive cover of the closed card cage radiator structure of specific embodiment of the invention description is formed with printed wiring board
Independent screen unit one by one, so that electromagnetic interference mutual between box house plug-in unit is very low；
(6) do not have air-cooled in the closed card cage radiator structure of specific embodiment of the invention description, water cooling etc. is delicate
Radiator structure, therefore the reliability of radiator structure entirety is very high；
(7) the closed card cage radiator structure of specific embodiment of the invention description and method are directly to crucial heat generating spot
Direct construction cooling duct, so that the cooling effect at thermo-responsive position is clearly；
(8) the main building block of the card cage of specific embodiment of the invention description all uses metal plate blanking structure and folding
O ing makes part, therefore the advantage of lower cost of card cage.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form.Though
So the present invention is disclosed as above with preferred embodiment, and however, it is not intended to limit the invention.It is any to be familiar with those skilled in the art
Member, in the case where not departing from Spirit Essence of the invention and technical solution, all using in the methods and techniques of the disclosure above
Appearance makes many possible changes and modifications or equivalent example modified to equivalent change to technical solution of the present invention.Therefore,
Anything that does not depart from the technical scheme of the invention are made to the above embodiment any simple according to the technical essence of the invention
Modification, equivalent replacement, equivalence changes and modification, all of which are still within the scope of protection of the technical scheme of the invention.
Claims (5)
1. a kind of closed card cage radiator structure, which is characterized in that for the printed circuit board (9) in closed card cage
It radiates, the radiator structure includes:
The card cage cylindrical body being made of after-frame (1), front frame (2), lower wall (3), upper wall (4)；
Thermally conductive cover (11) is provided with heating column (10) on the thermally conductive cover (11), and printed circuit board described in every piece (9) is and institute
It states thermally conductive cover (11) and forms a bound cell；
The guide rail (5) of the card cage cylindrical body inner upper wall and lower wall is set, for realizing the bound cell with set
It sets the docking plug guiding between the socket (6) at card cage cylindrical body rear portion, while described thermally conductive will cover (11)
Heat is oriented to the cabinet of the closed card cage；
The heat of the printed circuit board (9) is oriented to the thermally conductive cover (11), while the printing by the heating column (10)
The heat of circuit board (9) is also conducted by heat radiation, free convection mode to the thermally conductive cover (11), and the thermally conductive cover (11) is logical
The cabinet that the guide rail (5) conducts heat to the closed card cage is crossed, then will by the cabinet of the closed card cage
Heat, which is conducted to atmosphere, completes entire radiation processes；
Upper wall and lower wall inside the card cage cylindrical body are equipped with the elongated metal plate of normal pitch, and adjacent two
The guide-track groove that gap between elongated metal plate described in block is formed is as the guide rail for carrying out plug guiding to the bound cell
(5)；
The radiator structure further comprises the reinforcing rib (7) that card cage cylindrical body outer surface is arranged in, the reinforcement
Muscle (7) is used to reinforce the side wall of the card cage cylindrical body, enhances the heat dissipation of the closed card cage as radiating fin
Performance；
Between the lower wall (3) and upper wall (4) and the lower wall (3), upper wall (4) and the after-frame (1), front frame (2) it
Between, between the card cage cylindrical body and the elongated metal plate, the card cage cylindrical body and the reinforcing rib (7)
Between be formed with metal plate seam (12), the metal plate seam (12) use conduction heat sealable glue material to be filled with guarantee sealing and
Heat dissipation performance；
The after-frame (1), front frame (2), lower wall (3) and upper wall (4) are all made of metal plate blanking structure；The elongated metal plate and
Reinforcing rib (7) is all made of metal plate blanking structure.
2. a kind of card cage characterized by comprising door (8), back shroud (13), socket (6), printed circuit board (9), and
Radiator structure as described in claim 1；The door (8) is fixed on the front frame (2), and the back shroud (13) is fixed on institute
It states on after-frame (1), the door (8), back shroud (13) and the card cage cylindrical body form closed cabinet；One piece or two
It is more than block by the printed circuit board (9) and the thermally conductive bound cell that is formed of cover (11) by with setting after the cabinet
The inside of the card cage is arranged in socket (6) grafting in portion.
3. card cage according to claim 2, it is characterised in that: the socket (6) is arranged on the back shroud (13).
4. a kind of closed card cage heat dissipating method based on structure as described in claim 1, which is characterized in that including following step
It is rapid:
A: the heat of printed circuit board (9) is oriented to thermally conductive cover (11) by heating column (10)；
B: the heat of the printed circuit board (9) is conducted by heat radiation, free convection mode to the thermally conductive cover (11) simultaneously；
C: the thermally conductive cover (11) conducts heat to the cabinet of closed card cage by guide rail (5), then by described closed
The cabinet of card cage conducts heat to atmosphere and completes entire radiation processes.
5. closed card cage heat dissipating method according to claim 4, it is characterised in that: the heat dissipating method further includes institute
The heat for stating closed plug-in unit box body further pass through be arranged in the box outer surface reinforcing rib (7) conduction it is complete to atmosphere
At entire radiation processes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510376331.XA CN106332498B (en) | 2015-07-01 | 2015-07-01 | Closed card cage radiator structure, card cage and heat dissipating method including the structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510376331.XA CN106332498B (en) | 2015-07-01 | 2015-07-01 | Closed card cage radiator structure, card cage and heat dissipating method including the structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106332498A CN106332498A (en) | 2017-01-11 |
| CN106332498B true CN106332498B (en) | 2019-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510376331.XA Active CN106332498B (en) | 2015-07-01 | 2015-07-01 | Closed card cage radiator structure, card cage and heat dissipating method including the structure |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN207625986U (en) * | 2017-11-29 | 2018-07-17 | Abb瑞士股份有限公司 | A kind of circuit board assemblies, electric unit and electrical equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202494971U (en) * | 2012-02-14 | 2012-10-17 | 深圳市研祥软件技术有限公司 | Reinforced CPCI (Compact Peripheral Component Interconnect) media board, chassis for installing the reinforced CPCI media board and reinforced CPCI computer |
| CN202918613U (en) * | 2012-09-03 | 2013-05-01 | 南京丰泰通信技术股份有限公司 | Multifunctional multiplexing access device with capability of closed heat radiation |
| CN204119683U (en) * | 2014-09-02 | 2015-01-21 | 北京四方继保自动化股份有限公司 | A kind of IP protects subrack |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4366863B2 (en) * | 2000-02-02 | 2009-11-18 | 株式会社デンソー | Electronic control unit |
-
2015
- 2015-07-01 CN CN201510376331.XA patent/CN106332498B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202494971U (en) * | 2012-02-14 | 2012-10-17 | 深圳市研祥软件技术有限公司 | Reinforced CPCI (Compact Peripheral Component Interconnect) media board, chassis for installing the reinforced CPCI media board and reinforced CPCI computer |
| CN202918613U (en) * | 2012-09-03 | 2013-05-01 | 南京丰泰通信技术股份有限公司 | Multifunctional multiplexing access device with capability of closed heat radiation |
| CN204119683U (en) * | 2014-09-02 | 2015-01-21 | 北京四方继保自动化股份有限公司 | A kind of IP protects subrack |
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