CN105611799B - Attemperator and communication equipment - Google Patents
Attemperator and communication equipment Download PDFInfo
- Publication number
- CN105611799B CN105611799B CN201510977742.4A CN201510977742A CN105611799B CN 105611799 B CN105611799 B CN 105611799B CN 201510977742 A CN201510977742 A CN 201510977742A CN 105611799 B CN105611799 B CN 105611799B
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- Prior art keywords
- insulating layer
- cover
- communication equipment
- heat
- support frame
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Classifications
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- 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
- H05K7/20209—Thermal management, e.g. fan control
-
- 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
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/03—Covers
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Thermal Insulation (AREA)
Abstract
The invention discloses a kind of attemperators, are related to communication equipment field, solve the problems, such as that cold district part low power base station winter low temperature can not work normally.A kind of attemperator of the invention, heat preservation and other occasions for needing to keep the temperature suitable for communication equipment, comprising: the insulation cover formed by least two layers of insulating layer；It is formed between two layers of insulating layer for heat-insulated air layer.
Description
Technical field
The present invention relates to communication equipment field more particularly to a kind of attemperators and communication equipment.
Background technique
Communication equipment needs the operation of the ability normal table in suitable environment, during the cold season, part power load
Lesser communication station room temperature is too low, if can waste a large amount of electric energy using air-conditioning heating.In addition to air-conditioning heating, in the industry
For the partial insulation at Miniature communication station, the product that mainly uses is there are also thermal insulation cabinet, incubator and insulation cover, but existing heat preservation
Product has the following problems:
1) existing thermal insulation cabinet and incubator are all made of using heat preservation plate material, good heat insulating, but weight is big, and volume is big,
Transport is inconvenient；Second is that needing to carry out processing cutting, splicing when installation according to field condition, installation workload is big；Third is that insulation board
Material belongs to hard material, can not deform, and base station limited for spatial area is not available.
2) existing insulation cover is made into braced frame, heat preservation of the installation pvc material as heat preservation material using angle steel
Cover；Its thermal insulation property relies on merely the material of insulation cover, since the coefficient of heat conduction of such material is larger, material is thin, heat insulating ability
It can be extremely limited.
Summary of the invention
The present invention provides a kind of attemperator and communication equipment, good heat insulating and light, solves existing communication and sets
Standby insulating product is not readily transportable, the problem of installation and thermal insulation property deficiency.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that
The embodiment of the present invention provides a kind of attemperator, the heat preservation suitable for communication equipment, comprising: is kept the temperature by least two layers
The insulation cover that layer is formed；It is formed between two layers of insulating layer for heat-insulated air layer.
Preferably, the insulation cover includes: corresponding with the leading flank of communication cabinet, top surface and trailing flank first assembled single
Member, and, the second assembled rigid unit corresponding with the left/right side of communication cabinet, first assembled rigid unit and described second assembled
The junction of unit is provided with connector or adhesive, and first assembled rigid unit and second assembled rigid unit pass through the company
The effect of fitting or adhesive forms the cover for accommodating communication cabinet.
Optionally, the connector includes zipper, hasp, and the adhesive includes velcro.
Further, the attemperator further include: heat-preserving cover stand is used to support the insulation cover, makes the heat preservation
Cover forms the enclosure space for accommodating communication equipment.
Optionally, the insulation cover includes the first insulating layer and the second insulating layer；First insulating layer, which forms to accommodate, to be led to
Believe that the inner cover of equipment, second insulating layer form the outer cover for accommodating the inner cover.
Optionally, the heat-preserving cover stand includes two sets of support frames；First set support frame is used to support first heat preservation
Layer, makes first insulating layer form the inner cover, second set of support frame is used to support second insulating layer, makes described second
Insulating layer forms the outer cover.
Optionally, support frame as described above includes vertical rack and level frame, and the level frame is used to form supporting surface, the level
Frame is fixed on the vertical rack, and the supporting surface that the vertical rack is used to form the level frame provides support.
Optionally, the vertical rack of the first set support frame is fixed on the chute of the communication equipment, and described first
The supporting surface of set support frame is located at the top of the communication equipment；The vertical rack of second set of support frame is also secured at described logical
On the chute for believing equipment, alternatively, being fixed on the level frame of the first set support frame, the support of second set of support frame
Face is located at the top of the supporting surface of the first set support frame.
Preferably, be located in the air layer between two layers of insulating layer with a thickness of 15~25mm.
Further, the attemperator further include: temperature control system；The temperature control system includes: temperature detector, control
Device, blower and air duct, the temperature detection sensor are used to detect the environment temperature of communication equipment in insulation cover, the controller
For when the environment temperature is higher than preset temperature, control blower starting to pass through air duct radiation.
It is provided in the air duct from the blinds that hangs down, plays the role of the sealing air duct when blower does not start.
The insulating layer is made of heat-insulating flame-retardant flexible material.
The embodiment of the present invention also provides a kind of communication equipment, comprising: described in any item attemperators.
Attemperator and communication equipment provided in an embodiment of the present invention, insulation cover are formed by least two layers of insulating layer, and two
It is formed between layer insulating layer for heat-insulated air layer, good heat insulating and light is easy to transport, installation, solve existing
There is the insulating product of communication equipment to be unfavorable for the problem of transport, installation and thermal insulation property deficiency.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to needed in the embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the sectional view of insulation cover provided in an embodiment of the present invention；
Fig. 2 is the structure chart one of insulation cover support frame provided in an embodiment of the present invention；
Fig. 3 is the structure chart two of insulation cover support frame provided in an embodiment of the present invention；
Fig. 4 is the design drawing of the concatenation unit of insulation cover provided in an embodiment of the present invention；
Fig. 5 is the splicing schematic diagram of the first concatenation unit of insulation cover provided in an embodiment of the present invention；
Fig. 6 is the structure chart one of insulation cover support frame in specific embodiment provided in an embodiment of the present invention；
Fig. 7 is the structure chart one of insulation cover support frame in specific embodiment provided in an embodiment of the present invention；
Fig. 8 is the structural block diagram of temperature control system provided in an embodiment of the present invention.
Appended drawing reference
9- air layer, 10- insulating layer, 11- vertical rack, 12- level frame, 100- supporting surface,
The level frame of 12A- first set support frame, the level frame of second set of support frame of 12B-, 21- chute,
22- bolt, 30- communication cabinet, the first assembled rigid unit of 41-, the second assembled rigid unit of 42-,
51- temperature detector, 52- controller, 53- blower.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that 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 all other
Embodiment shall fall within the protection scope of the present invention.
Embodiment
The embodiment of the present invention provides a kind of attemperator, suitable for the heat preservation of communication equipment, as shown in Figure 1, comprising: by extremely
The insulation cover that few two layers of insulating layer 10 is formed；It is formed between two layers of insulating layer 10 for heat-insulated air layer 9.
Relatively closed space is formed between two layers of insulating layer, the air layer in confined space will avoid that heat occurs with extraneous
Convection current, can just be formed with the air layer 9 of heat insulation, air layer 9 with a thickness of 15~25mm, (general 20mm is preferably 20mm
Can reach good thermal requirements), the thickness and tight requirements of air layer 9 and the thermal insulation property design requirement of insulation cover are related,
The present embodiment is not especially limited.Certainly, the insulating layer 10 in the present embodiment is not limited to two layers, the heat-insulated air layer 9 of formation
It is also not necessarily limited to one layer.
Preferably, above-mentioned insulating layer 10 is made of heat-insulating flame-retardant flexible material.
Attemperator provided in this embodiment keeps the temperature communication equipment using Heat Insulation of Air Layer, good heat insulating and light,
Solve the problems, such as that the insulating product heat preservation of existing communication equipment is insufficient, installation is inconvenient.
Above-mentioned attemperator further include: heat-preserving cover stand is used to support insulation cover, forms insulation cover and accommodates communication equipment
Space.Optionally, as shown in Figures 2 and 3, support frame as described above includes vertical rack 11 and level frame 12, and level frame 12 is used for shape
At supporting surface 100, level frame 12 is fixed on vertical rack 11, for the supporting surface 100 that support level frame 12 is formed, vertical rack 11
It can be fixed on chute 21, fixed form includes but is not limited in such a way that bolt 22 is fixed.Vertical rack 11 and level frame
12 can use hard plastic material or metal material, be typically chosen light material to be readily transported.Insulation cover is overlying on support
The space for accommodating communication equipment is formed on frame.For heat-preserving cover stand with respect to incubator/cabinet made of plate, quality is lighter, more saves
Material, and it is easy to disassemble, and in addition the present embodiment heat-preserving cover stand may be disposed at the outside of communication cabinet, be not take up equipment sky
Between.
Above-mentioned insulation cover includes at least two layers, and heat-insulated to include at least one layer with air layer, insulating layer can be formed with single layer to be covered
Body, then cover is nested, and formation is heat-insulated to use air interlayer；It can also be initially formed the multilayered structure of sandwiched air layer, re-form cover
Body, in this case to be readily transported, cover can reserve inflating port, be inflated again during installation.Latter situation is more
Simply, it is not detailed, below by taking double insulation as an example, the first situation is described in detail.
Above-mentioned insulation cover includes the first insulating layer and the second insulating layer；First insulating layer, which is formed, accommodates the interior of communication equipment
Cover, the second insulating layer form the outer cover for accommodating inner cover.Heat-preserving cover stand includes two sets of support frames；First set support frame is used to support
First insulating layer, makes the first insulating layer form inner cover, and second set of support frame is used to support the second insulating layer, makes the second insulating layer shape
At outer cover, second set of support is erected at outside first set support frame when installation, and closed air layer is formed between inner cover and outer cover, is used
In heat-insulated.Shown in referring to figure 6 and figure 7, the vertical rack of first set support frame (is located at level frame 12A in vertical rack 11 in corresponding diagram 6
With the part between chute 21) it is fixed on the chute 21 of communication equipment, the supporting surface of first set support frame is located at communication
The top of equipment；Second set of support frame vertical rack (be located in vertical rack 11 in corresponding diagram 6 level frame 12A and level frame 12B it
Between part) be fixed on the level frame 12A of first set support frame, the supporting surface of second set of support frame is located at first set support frame
Supporting surface top.Insulating layer can form cover with single layer, and the piece weight that can reduce component part is readily transported and pacifies
Dress.Certainly, the vertical rack of second set of support frame, which also can choose, is directly anchored on the chute 21 of communication equipment.
To make to reduce the weight of insulation cover component part, and make insulation cover that there is versatility, above-mentioned insulation cover can use
Erection method is formed, i.e., above-mentioned insulation cover is designed to several assembled rigid units (the generally single-piece of plane), then scene is applied
Several assembled rigid units are stitched together by working hour can form cover.Equally, insulation cover includes the case where multi-layer heat preserving layer, can be with
Each insulating layer single layer designs at assembled rigid unit, and then it is first assembled form internal cover, the then cover outside assembled formation again
Body, at this time it should be noted that internally, outer outlet body be sealed, make the air layer between inside and outside cover do not flow or it is approximate do not flow,
Heat-blocking action can be played.It is of course also possible to it is initially formed the assembled rigid unit of folder air layer, and it is then assembled to form insulation cover cover, it needs
It should be noted that the air layer that assembled rigid unit itself includes can play heat-blocking action, the insulation cover cover that assembly is formed can guarantee guarantor
Flowing (be subject to the heat insulation effect for not influencing insulation cover) does not occur for warm cover inner air and outer air.
Communication equipment is typically disposed in communication cabinet, and communication cabinet 30 is generally the cuboid erect, illustratively, communication
Cabinet 30 it is deep it is wide it is high be respectively a ', b ', h ', the design of specific assembled rigid unit can be such that as shown in figure 4, insulation cover include: by
The first assembled rigid unit 41 corresponding with the leading flank of communication cabinet 30, top surface and trailing flank, and, the left/right side with communication cabinet
Corresponding second assembled rigid unit 42 in face, the first side length of the first assembled rigid unit 41 are a+2h, and the second side length is b, and second is assembled single
First side length of member 42 is h, and the second side length is a, wherein a, b, h are greater than a ', b ' and h ', to consider insulation cover by communication cabinet
The size in reserved part maintenance space after envelope.For double-layer heat insulation cover, internal layer insulation cover and communication cabinet size difference are not
It is more, but should have installation surplus, i.e., in the assembled rigid unit size of internal layer insulation cover, a, b, h are slightly larger than a ', b ' and h '；Outer layer heat preservation
The h ratio that the size (deep wide high) of cover should have a margin compared to inner cover and (can at least reserve the surplus to form air layer) outer layer insulation cover faces
Nearly internal layer insulation cover high about 20mm or so, depth a and width b ratio close on internal layer insulation cover and are about 40mm or so.
First assembled rigid unit 41 is Chong Die with the join domain of the second assembled rigid unit 42 and is provided with connector or adhesive, the
One assembled rigid unit 41 and the second assembled rigid unit 42 form the cover for accommodating communication cabinet by the effect of connector or adhesive.Institute
Stating connector includes zipper, hasp etc., and the adhesive includes velcro etc..Communication equipment installation scenario, being frequently encountered needs
The case where wanting multiple communication cabinet 30, at this moment can be placed side by side by multiple communication cabinets 30, and as shown in Figure 5 by multiple first
Assembled rigid unit 41 is bolted together, leading flank, the top surface of splicing and the trailing flank of splicing that corresponding communication cabinet 30 side by side splices,
And the left and right sides still uses the second assembled rigid unit 42, and by connector or glues with the two sides of figure after assembly shown in Fig. 5
The effect of component is bonded together, and forms cover.
Above-mentioned first assembled rigid unit 41,42 length of the second assembled rigid unit are generally slightly rich, after installing to bracket, first
Assembled rigid unit 41, the second assembled rigid unit 42 are sagging under the effect of gravity, be affixed on after the bottom edge infolding of lower part ground (when having pedestal,
It can also be fixed on pedestal, but also to guarantee the airtightness of air interlayer).
In addition, attemperator described in the present embodiment is kept the temperature using insulation cover, generated when being worked using communication equipment itself
Heat, maintain preference temperature, to guarantee the normal work of communication equipment, but if weather conditions improve, at this moment if cannot and
When remove insulation cover, the environment temperature that may cause communication equipment is excessively high, to solve this problem, heat preservation provided in this embodiment
Device can also be as shown in figure 8, further comprise: temperature control system；The temperature control system includes: temperature detector 51, controller 52, wind
Machine 53 and air duct (not shown), temperature detection sensor 51 are used to detect the environment temperature of communication equipment, and controller 52 is used
In when environment temperature is higher than preset temperature, the control starting of blower 53 passes through air duct radiation.It is provided in the air duct from vertical hundred
Leaf plays the role of sealing air flue when blower does not start.
In this way, insulation cover can be installed in the colder winter approached of temperature, even if on rare occasion in insulation cover
Temperature is excessively high, will affect the work of communication equipment without the excessively high temperature of worry, temporarily, to remove insulation cover, tear open to spring
Except when connector or adhesive need to only be removed, then remove insulation cover or do not remove, will only fall in the assembled rigid unit volume on ground
(under normal circumstances since ventilation opening is set to front and back sides, the first assembled rigid unit need to can only be rolled and be got out of the way to cabinet top surface
Ventilation opening), it is very convenient.
Attemperator good heat insulating provided in an embodiment of the present invention and light, solves the heat preservation of existing communication equipment
The problem of properties of product deficiency.In order to which those skilled in the art better understand the knot of attemperator provided in an embodiment of the present invention
Structure is described in detail attemperator provided by the invention below by specific embodiment.
The present embodiment attemperator mainly forms as follows, comprising:
1) heat-preserving cover stand is used to support insulation cover, and insulation cover is made to form the enclosure space for accommodating communication equipment.
Specifically, heat-preserving cover stand may be designed to two sets of support frames of different sizes, two sets of support frames can share a set of
Vertical rack (as shown in Figure 6 and Figure 7, i.e. the heat-preserving cover stand of the present embodiment includes a set of vertical rack 11, two sets of level frames (12A,
12B), two sets of level frames respectively form supporting surface respectively and are fixed on vertical rack 11, and highly at a distance of 20mm, vertical rack 11 passes through
Bolt 22 is fixed on chute 21, and the size of horizontal bracket 12A (belonging to first set support frame) is all larger than base station equipment, and and base
Station equipment guarantees space appropriate；Horizontal bracket 12B (belonging to second set of support frame) is 40mm longer than horizontal bracket 12A respectively, installation
When second set of level frame 12B be set to above first set level frame 12A, two layers of insulation cover is respectively fitted over the horizontal branch of two sets of support frames
On support.
2) insulation cover
Present apparatus insulation cover uses double thermal insulation flame retardant flexible material, is separately mounted on two sets of support frames, air thickness
20mm is spent, two sets of flexible materials have good leakproofness, guarantee the insulation effect of air layer.In order to adapt to in-site installation just
Prompt, quickly requirement, insulation cover design two kinds of basic installation unit (corresponding front and backs by the way of assembled, according to characteristic
First assembled rigid unit 41 of side and top surfaces, the second assembled rigid unit 42 of corresponding left/right side), the side of every kind of installation unit
Edge uses large area velcro, convenient for the quick-assembling at scene, and adapts to the base station equipment of various length specifications.
Meanwhile when turning the rising of warm temperature in season, tears the velcro of base station equipment front of and behind insulation cover and packs up,
The proper heat reduction that can guarantee base station equipment does not need disassembly insulation cover.
3) temperature control system
Temperature control system is made of temperature detection, control and blower three parts, and temperature detection sensor is mounted on base station equipment
It is positive.When the temperature is excessively high, control blower starting heat dissipation.The miniature air duct of blower fan system is mounted on the insulation cover of side of cabinet
Bottom, it is daily not need to dismantle, there is the double-deck blinds that hangs down certainly to play sealing function in air duct
The embodiment of the present invention designs a kind of insulation cover made of Double-layer flexible fire proofing material, good using air layer
Insulation effect, realize that, to the partial insulation of communication equipment, which has heat insulation effect good, non-maintaining, easy to install, light
The characteristics of, there is remarkable effect to energy conservation.
The embodiment of the present invention also provides a kind of communication equipment, comprising: attemperator described in any of the above embodiments.It may be implemented
Heat insulation effect but hardly increase weight of equipment, and it is light, be easily installed.
Obviously, those skilled in the art it is clear that, the attemperator of the present embodiment is not limited to communication equipment, also
Suitable for any other occasion for needing to keep the temperature, needing to maintain preference temperature.
Further it will be understood that all technical characteristics disclosed by the embodiments of the present invention, under the premise of not conflicting
It uses in any combination.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those familiar with the art, all answers
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (9)
1. a kind of attemperator, the heat preservation suitable for communication equipment characterized by comprising formed by least two layers of insulating layer
Insulation cover；It is formed between two layers of insulating layer for heat-insulated air layer；Wherein, the insulation cover includes: and communication cabinet
Leading flank, corresponding first assembled rigid unit in top surface and trailing flank, and it is corresponding with the left/right side of communication cabinet second assembled
Unit, the junction of first assembled rigid unit and second assembled rigid unit are provided with connector or adhesive, and described first
Assembled rigid unit and second assembled rigid unit form the cover for accommodating communication cabinet by the effect of the connector or adhesive；
Wherein, the insulating layer is made of heat-insulating flame-retardant flexible material；
The attemperator further include: heat-preserving cover stand is used to support the insulation cover, forms the insulation cover and accommodates communication
The space of equipment；
The heat-preserving cover stand includes vertical rack and level frame, and the level frame is used to form supporting surface, and the level frame is fixed
On the vertical rack, the supporting surface that the vertical rack is used to form the level frame provides support.
2. attemperator according to claim 1, which is characterized in that
The connector includes zipper, hasp, and the adhesive includes velcro.
3. attemperator according to claim 1, which is characterized in that the insulation cover includes that the first insulating layer and second protect
Warm layer；First insulating layer forms the inner cover for accommodating communication equipment, and second insulating layer, which is formed, accommodates the outer of the inner cover
Cover.
4. attemperator according to claim 3, which is characterized in that the heat-preserving cover stand includes two sets of support frames；The
A set of support frame is used to support first insulating layer, and first insulating layer is made to form the inner cover, and second set of support frame is used
In supporting second insulating layer, second insulating layer is made to form the outer cover.
5. attemperator according to claim 4, which is characterized in that the vertical rack of the first set support frame is fixed on institute
It states on the chute of communication equipment, the supporting surface of the first set support frame is located at the top of the communication equipment；
The vertical rack of second set of support frame is also secured on the chute of the communication equipment, alternatively, being fixed on described
On the level frame of a set of support frame, the supporting surface of second set of support frame is located at the upper of the supporting surface of the first set support frame
Side.
6. attemperator according to claim 1 or 2, which is characterized in that the sky being located between two layers of insulating layer
Gas-bearing formation with a thickness of 15~25mm.
7. attemperator according to claim 1 or 2, which is characterized in that further include: temperature control system；
The temperature control system includes: temperature detector, controller, blower and air duct, and the temperature detector is for detecting heat preservation
The environment temperature of communication equipment in covering, the controller are used for when the environment temperature is higher than preset temperature, and control blower opens
It is dynamic to pass through air duct radiation.
8. attemperator according to claim 7, which is characterized in that
It is provided in the air duct from the blinds that hangs down, plays the role of the sealing air duct when blower does not start.
9. a kind of communication equipment characterized by comprising the described in any item attemperators of claim 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510977742.4A CN105611799B (en) | 2015-12-23 | 2015-12-23 | Attemperator and communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510977742.4A CN105611799B (en) | 2015-12-23 | 2015-12-23 | Attemperator and communication equipment |
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| Publication Number | Publication Date |
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| CN105611799A CN105611799A (en) | 2016-05-25 |
| CN105611799B true CN105611799B (en) | 2019-02-22 |
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| CN114396551B (en) * | 2022-01-18 | 2024-01-12 | 杭州埃欧哲建设工程咨询有限公司 | Intelligent noise monitoring device based on AI |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2692648B2 (en) * | 1995-06-01 | 1997-12-17 | 日本電気株式会社 | Outdoor equipment enclosure |
| CN203441135U (en) * | 2013-07-19 | 2014-02-19 | 孟越峰 | Ventilation and insulation system for box-type substation |
| CN104703438B (en) * | 2013-12-09 | 2017-12-22 | 中冶长天国际工程有限责任公司 | A kind of cooling device and system |
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