CN110880697A - Be used for radiating block terminal of dust removal - Google Patents
Be used for radiating block terminal of dust removal Download PDFInfo
- Publication number
- CN110880697A CN110880697A CN201911129435.5A CN201911129435A CN110880697A CN 110880697 A CN110880697 A CN 110880697A CN 201911129435 A CN201911129435 A CN 201911129435A CN 110880697 A CN110880697 A CN 110880697A
- Authority
- CN
- China
- Prior art keywords
- dust
- dust removal
- box
- heat dissipation
- accommodating cavity
- 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.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools, brushes, or analogous members
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/46—Boxes; Parts thereof or accessories therefor
Abstract
The invention discloses a distribution box for dust removal and heat dissipation, which comprises a box body, wherein a partition plate is arranged in the middle of the box body, a first accommodating cavity is formed in the upper part of the partition plate, a second accommodating cavity is formed in the lower part of the partition plate, ventilation openings are formed in two side walls of the first accommodating cavity, a ventilation assembly is arranged on the inner side wall of the first accommodating cavity, a dust removal assembly is arranged in the first accommodating cavity and provided with a movable dust removal unit and a driving unit, a detection device is arranged on the top wall of the first accommodating cavity, a dust collection assembly is arranged in the second accommodating cavity, and a dust collection opening is formed in the upper end face of the partition plate. The dust removal component is adopted for removing dust, and the combined switch cannot be touched by mistake in the dust removal process; the ventilation assembly is used for quickly cooling in the box body and cleaning dust on the back of the combination switch, so that the effects of dust removal and heat dissipation are achieved; adopt dust absorption subassembly, in time suck away the dust, promote clean effect.
Description
Technical Field
The invention relates to the field of distribution boxes, in particular to a distribution box for dust removal and heat dissipation.
Background
A distribution box is an electrical device used for distributing electrical energy. Distribution boxes are usually used in a large amount in factories and construction sites, but in an operation environment with more dust, the dust is easy to diffuse into the distribution boxes, and once the dust concentration is too high, safety accidents such as dust explosion and the like can be caused, so that great potential safety hazards are brought; moreover, the dust contains a large amount of metal powder, and the metal powder is attached to a circuit in the distribution box, so that short circuit of the circuit can be caused, and safety accidents such as explosion or fire are easily caused. There has been a block terminal with dust removal function on the existing market, and the block terminal has the brush, rotates in order to reach the effect of dust removal through the brush. The applicant finds that the product has the following defects in the dust removal process: because the circuit switch has more gaps, if the brush needs to go deep into the gaps to clean dust in the gaps, the brush is easy to touch the combined switch by mistake, so that abnormal operation or stop of the power equipment is caused, an operator needs to push the switch again, and the production process is influenced; meanwhile, the brush is usually made of animal hair or chemical fibers and belongs to inflammables, and once the temperature in the distribution box is too high, the brush is extremely easy to spontaneously combust to cause fire.
Disclosure of Invention
In view of the above, the present invention is directed to a power distribution box for removing dust and dissipating heat, so as to solve all or one of the problems in the background art.
Based on the above purpose, the invention provides a distribution box for dust removal and heat dissipation, which comprises a box body, the middle part of the box body is provided with a clapboard, the upper part of the clapboard is a first containing cavity, the lower part of the clapboard is a second containing cavity, the two side walls of the first accommodating cavity are provided with ventilation openings, the inner side wall of the first accommodating cavity is provided with a ventilation component, the ventilation component is arranged on one side far away from the opening of the box body, the first accommodating cavity is internally provided with a dust removal component, the dust removing component is provided with a movable dust removing unit and a driving unit, the top wall of the first accommodating cavity is provided with a detection device, the second containing cavity is internally provided with a dust absorption assembly, the upper end surface of the clapboard is provided with a dust absorption opening in a penetrating way, the upper end of dust absorption mouth towards first chamber that holds, the lower extreme of dust absorption mouth with dust absorption component is connected.
Optionally, the ventilation subassembly includes the trunk line, a plurality of capillary duct have been installed to the port of trunk line, a plurality of wind hole has been seted up to one side of capillary duct, the external air pump of having installed of the other end of trunk line.
Optionally, the dust removal unit includes a support, the support is respectively fixed install in on the roof and the diapire of first chamber of holding, the support is followed the box opening direction is installed, the slider has been installed to the symmetry on the support, the slider facial make-up is equipped with the guide rail, the guide rail both ends with slider fixed connection, vertical removal's guide rail slider has been installed to the symmetry on the guide rail, the fixed cleaning roller that has been installed between the guide rail slider, the cleaning roller has rotatable clean portion.
Optionally, the rack is arranged on the inner side wall of the first accommodating cavity and comprises a fixing portion, a bending portion is arranged at the lower end of the fixing portion and faces the opening direction of the box body, and the bending portion and the fixing portion are combined to form a semi-closed accommodating cavity.
Optionally, shielding plates are respectively installed on two side walls of the box body, the shielding plates are installed on the upper portion of the ventilation opening, and the shielding plates extend towards the ground.
Optionally, the upper end of the dust suction opening is cylindrical, the cylinder has a sealed top wall, a flange is arranged on the top wall, and a groove is formed in the side wall of the cylinder.
Optionally, the lower end of the first accommodating cavity is provided with a concave curved surface.
Optionally, the dust collection assembly includes a pipe, one end of the pipe is connected to the lower end of the dust collection port, the other end of the pipe is provided with the dust filtering box, the dust filtering box can be used for collecting accumulated dust, and the other end of the dust filtering box is provided with the fan.
Optionally, the duct of the cleaning assembly is helical.
From the above, the distribution box for dust removal and heat dissipation provided by the invention is provided with the dust removal assembly, the distribution box comprises a support arranged in a first accommodating cavity, a sliding block is arranged on the support, a guide rail is arranged on the sliding block, and a cleaning roller is movably arranged on the guide rail; the ventilation assembly is arranged, high-pressure gas is sprayed out through the capillary air holes, heat is dissipated in the box in time, and circuit damage caused by overhigh temperature is avoided; meanwhile, the ventilation assembly can effectively clean dust on the back of the combination switch, and the dust removal effect is improved; be provided with dust absorption subassembly, can siphon away the dust in the block terminal, avoid a large amount of laying dust in the block terminal to eliminate the hidden danger of dust explosion because of dust concentration is too high and bring.
Drawings
Fig. 1 is a schematic partial structural view of a distribution box for dust removal and heat dissipation according to an embodiment of the present invention;
fig. 2 is a schematic partial structural view of a distribution box for dust removal and heat dissipation according to an embodiment of the present invention;
FIG. 3 is a cutaway schematic view of a power distribution box for dust removal and heat dissipation in accordance with an embodiment of the present invention;
fig. 4 is a schematic partial structural view of the dust removal and heat dissipation distribution box according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
As an embodiment, the invention provides a distribution box for dust removal and heat dissipation, which comprises a box body, wherein a partition plate is arranged in the middle of the box body, a first accommodating cavity is arranged at the upper part of the partition plate, a second accommodating cavity is arranged at the lower part of the partition plate, vent holes are formed in two side walls of the first accommodating cavity, a ventilation assembly is arranged on the inner side wall of the first accommodating cavity, the ventilation assembly is arranged on one side far away from an opening of the box body, a dust removal assembly is arranged in the first accommodating cavity, the dust removal assembly is provided with a movable dust removal unit and a driving unit, a detection device is arranged on the top wall of the first accommodating cavity, a dust collection assembly is arranged in the second accommodating cavity, a dust collection port is arranged on the upper end surface of the partition plate in a penetrating mode, the upper.
As shown in fig. 1 to 4, a distribution box for dust removal and heat dissipation comprises a box body 1, a partition plate 2 is installed in the middle of the box body, the upper portion of the partition plate 2 is a first accommodating cavity, the lower portion of the partition plate 2 is a second accommodating cavity, vents 8 are formed in two side walls of the first accommodating cavity, a ventilation assembly 3 is installed on the inner side wall of the first accommodating cavity, the ventilation assembly 3 is installed on one side far away from an opening of the box body, a dust removal assembly 5 is installed in the first accommodating cavity, the dust removal assembly 5 is provided with a movable dust removal unit and a driving unit, a detection device 4 is installed on the top wall of the first accommodating cavity, a dust collection assembly 6 is installed in the second accommodating cavity, a dust collection port 7 is installed through the upper end face of the partition plate 2, the upper end of the dust collection port 7 faces the first accommodating cavity.
In summary, the partition board 2 is arranged in the box body, the partition board 2 divides the box body 1 into a first accommodating cavity and a second accommodating cavity with different spaces, and the two side walls of the first accommodating cavity are provided with the ventilation openings 8, so that air convection can be formed inside and outside the box body 1, the temperature in the box body 1 can be dissipated in time, and the circuit damage caused by high temperature is avoided; the ventilation assembly 3 is arranged and used for cleaning dust in a gap at the back of the combined switch and improving the dust removal effect, and meanwhile, the ventilation assembly 3 blows air flow to further improve the heat dissipation effect of the distribution box; the dust removal assembly 5 is arranged, so that when dust in the box is cleaned, the combined switch can be prevented from being touched by mistake, the safety and reliability of operation are improved, and safety accidents are prevented from being caused; the dust removal device is provided with a detection device 4 for detecting the concentration of dust in the box body and the temperature in the box body, and when the concentration or the temperature of the dust exceeds a safety upper limit, the dust removal component 5 and the ventilation component 3 are started to remove dust and cool the interior of the distribution box in time so as to ensure the normal operation of electrical equipment; be provided with dust absorption subassembly 6, in the middle of the process of removing dust, in time suck away the dust, avoid the block terminal in the dust pile up, improve the operational environment in the block terminal.
Further, a dust removal assembly 5 is arranged in the first accommodating cavity, the dust removal assembly 5 comprises a dust removal unit and a driving unit, the dust removal unit comprises a support 501 fixedly arranged at four corners of the first accommodating cavity, the mounting direction of the support is consistent with the opening direction of the box body, a sliding block 502 is embedded in the support 501, guide rails 503 are symmetrically arranged on the sliding block 502, one end of each guide rail 503 is connected with the sliding block 503 positioned on one side of the top wall, the other end of each guide rail 503 is connected with the sliding block 502 positioned on one side of the bottom wall, the guide rails 503 are vertically arranged, guide rail sliding blocks 504 are sleeved on the guide rails 503, a cleaning roller 505 is arranged between the two guide rail sliding blocks 504, and; in the using process, when the detection device 4 detects that the dust concentration is too high, firstly, the driving unit in the dust removal assembly 6 drives the slider 502 on the bracket 501 to move, so that the guide rail 503 drives the cleaning roller 505 to move to the side away from the combination switch, secondly, the guide rail slider 504 drives the cleaning roller 505 to move in the vertical direction, so that the cleaning roller 505 moves to the gap, the guide rail slider 504 stops moving, secondly, the driving unit drives the slider 502 to move, so that the guide rail 503 drives the cleaning roller 505 to approach the gap, and finally, the cleaning part rotates to remove dust; when the next gap needs to be cleaned, the cleaning roller 505 firstly moves to one side far away from the combination switch, then vertically moves to the next gap, and then slowly moves close to the gap to finish the dust removal work; the cleaning roller 505 is far away from the combination switch when moving, and the combination switch is prevented from being touched by mistake, so that safety accidents caused by the fact that the switch is touched by mistake are avoided, and the safety and reliability in the dust removal process are improved.
Further, a placing frame 11 is arranged on the inner side wall of the first accommodating cavity and comprises a fixing part, the lower end of the fixing part is a bending part, the bending direction of the bending part faces the opening direction of the box body, and the bending part forms a semi-closed cavity body for placing the cleaning roller 505; when the dust removing assembly 5 is in a non-working state, the cleaning roller 505 is arranged in the placing frame 11, if the circuit spark is generated by the power distribution box, the bristles of the cleaning part can be ignited when the cleaning roller 505 is too close to the circuit, so that a fire is caused, and the placing frame 11 is arranged and can wrap the bristles of the cleaning part, so that the cleaning roller 505 is in a safe state in the non-working state.
Further, the ventilation assembly 3 includes a main pipe 301, the main pipe 301 penetrates through the side wall of the distribution box, a plurality of capillary pipes 302 are installed at a port of the main pipe 301 facing the first accommodating cavity, the capillary pipes 302 are distributed on the inner side wall of the first accommodating cavity and are installed at one side far away from the opening of the box body, a plurality of air holes are formed in one side of each capillary pipe 302, in the actual use process, the capillary pipes 302 are hidden at the back of the combination switch, an air pump 303 is externally connected to the port of the main pipe 301 facing the outside of the box body, in the use process, the detection device 4 in the first accommodating cavity detects that the dust concentration or the temperature exceeds the standard, an air pump 303 valve is immediately opened, and high-pressure air generated by the air pump 303 reaches each capillary pipe 302 from the main pipe 301 and is sprayed; because the dust is diffused with the air, a large amount of dust is adhered to gaps such as the back surface and the side surface of the combination switch, and because the gaps are too small, the cleaning roller is not easy to clean, the dust is blown out through high-pressure gas, a cleaning blind area of the cleaning roller 505 is made up, and the overall dust removal effect is improved; simultaneously in case the circuit is overheated in the block terminal, need do the cooling immediately to the circuit and handle, high-pressure gas sprays on combination switch and circuit, can take away a large amount of heats fast to reduce the temperature avoids the circuit to produce the damage because of the high temperature.
Furthermore, through holes 8 are formed in two side walls of the box body 1, a shielding plate 9 is arranged at the upper part of the vent hole 8, the shielding plate 9 extends towards the ground direction, and the shielding plate 9 is used for shielding dust in the air, so that the phenomenon that the vent hole is blocked by a large amount of dust to cause unsmooth heat dissipation is avoided; the partition plate 2 is provided with a cylindrical dust suction port 7, the dust suction port 7 is provided with a sealed top wall, the top wall is provided with a flange, the side wall of the dust suction port 7 is provided with a dust suction inlet, and the dust suction inlets distributed around the outer wall of the cylinder can suck dust in all directions, so that the dust suction efficiency is improved; the lower end of the first accommodating cavity is a concave curved surface 10, and when dust is accumulated on the bottom surface of the first accommodating cavity, the dust automatically slides to the dust suction inlet; the duct 601 of the dust collection assembly 6 is provided with a spiral shape to avoid that dust can diffuse into the distribution box from the duct 601 when the dust in the dust filter box is too much.
Specifically, when the detection device 4 in the distribution box detects that the dust concentration is too high or the temperature in the box is too high, the switches of the ventilation assembly 3 and the dust removal assembly 5 are started, the external air pump 303 of the ventilation assembly 3 works to generate high-pressure air flow, the high-pressure air flow reaches each capillary pipeline 302 through the main pipeline 301, the capillary pipelines 302 are provided with a plurality of air holes, and the high-pressure air flow is sprayed outwards from the air holes, so that on one hand, the effect of quickly cooling can be achieved, on the other hand, dust in gaps on the back of the combination switch can be cleaned, and the dust removal effect is improved; meanwhile, the dust removal assembly 5 moves, the sliding block 502 on the bracket 501 drives the cleaning roller 505 to move out of the placing rack 11 and move to one side far away from the combined switch under the driving of the driving unit, then the cleaning roller 505 moves to a gap needing to be cleaned under the driving of the guide rail sliding block 504, the driving unit drives the sliding block 502 on the bracket 501 again to drive the cleaning roller 505 to approach to the gap, cleaning is finally completed, the cleaning roller 505 is far away from the combined switch when moving, and safety accidents caused by mistaken touch of the combined switch are avoided; dust collection assembly 6 installs and holds the intracavity at the second, and when dust removal assembly 5 worked, dust collection assembly 6 in time siphoned away the dust, improved holistic dust removal effect.
In summary, the dust removal component 5 is adopted for dust removal, and the combined switch cannot be touched by mistake in the dust removal process; the ventilation assembly 3 is used for quickly cooling in the box body and cleaning dust on the back of the combination switch, and dust removal and heat dissipation effects are achieved; and the dust collection component 6 is adopted to absorb dust in time, so that the cleaning effect is improved.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
While the present invention has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art in light of the foregoing description.
The embodiments of the invention are intended to embrace all such alternatives, modifications and variances that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements and the like that may be made without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (8)
1. The utility model provides a block terminal for dust removal heat dissipation which characterized in that includes: the box, the baffle has been installed at the middle part of box, the upper portion of baffle is the first chamber that holds, the lower part of baffle holds the chamber for the second, the vent has been seted up on the first both sides wall that holds the chamber, the first inside wall facial make-up that holds the chamber is equipped with ventilation assembly, ventilation assembly install in keeping away from box open-ended one side, the first intracavity that holds has installed dust removal component, dust removal component has mobilizable dust removal unit and drive unit, the first roof facial make-up that holds the chamber is equipped with detection device, the second holds the intracavity and has installed dust collection component, the up end of baffle runs through and has installed the dust absorption mouth, the upper end orientation of dust absorption mouth the first chamber that holds, the lower extreme of dust absorption mouth with dust collection component connects.
2. The distribution box for dust removal and heat dissipation of claim 1, wherein: the ventilation assembly comprises a main pipeline, a plurality of capillary pipelines are installed at the port of the main pipeline, a plurality of air holes are formed in one side of each capillary pipeline, and an air pump is installed at the other end of the main pipeline in an external connection mode.
3. The distribution box for dust removal and heat dissipation of claim 1, wherein: the dust removal unit comprises a support, the support is fixedly arranged on the top wall and the bottom wall of the first accommodating cavity respectively, the support is arranged along the opening direction of the box body, sliding blocks are symmetrically arranged on the support, guide rails are arranged on the sliding blocks, the two ends of each guide rail are fixedly connected with the corresponding sliding block, vertically moving guide rail sliding blocks are symmetrically arranged on the guide rails, cleaning rollers are fixedly arranged between the guide rail sliding blocks, and each cleaning roller is provided with a rotatable cleaning part.
4. The distribution box for dust removal and heat dissipation of claim 1, wherein: the rack is arranged on the first inner side wall of the containing cavity and comprises a fixing portion, a bending portion is arranged at the lower end of the fixing portion and faces the direction of the opening of the box body, and the bending portion and the fixing portion are combined to form a semi-closed containing cavity.
5. The distribution box for dust removal and heat dissipation of claim 1, wherein: shielding plates are respectively arranged on two side walls of the box body, the shielding plates are arranged on the upper portion of the ventilation opening, and the shielding plates extend towards the ground direction.
6. The distribution box for dust removal and heat dissipation of claim 1, wherein: the upper end of the dust collection port is cylindrical, the cylinder is provided with a sealed top wall, a flange is arranged on the top wall, and a groove is formed in the side wall of the cylinder.
7. The distribution box for dust removal and heat dissipation of claim 1, wherein: the dust collection assembly comprises a pipeline, one end of the pipeline is connected and arranged at the lower end of the dust collection port, the other end of the pipeline is provided with the dust filtering box, the dust filtering box can be used for collecting accumulated dust, and the other end of the dust filtering box is provided with the fan.
8. The distribution box for dust removal and heat dissipation of claim 1, wherein: the pipeline of the dust collection component is spiral.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911129435.5A CN110880697B (en) | 2019-11-18 | 2019-11-18 | Be used for radiating block terminal of dust removal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911129435.5A CN110880697B (en) | 2019-11-18 | 2019-11-18 | Be used for radiating block terminal of dust removal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110880697A true CN110880697A (en) | 2020-03-13 |
| CN110880697B CN110880697B (en) | 2021-08-24 |
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ID=69730269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911129435.5A Active CN110880697B (en) | 2019-11-18 | 2019-11-18 | Be used for radiating block terminal of dust removal |
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| Country | Link |
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| CN (1) | CN110880697B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111416292A (en) * | 2020-05-19 | 2020-07-14 | 安徽同胜电力科技有限公司 | A exhaust device that is used for switch board cooling to use adjustable angle |
| CN113964662A (en) * | 2021-09-18 | 2022-01-21 | 天津市威匡电气设备有限公司 | Novel light current switch board device |
| CN117117686A (en) * | 2023-08-29 | 2023-11-24 | 河北万庆电力器材科技有限公司 | Block terminal with high-efficient heat radiation structure |
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| CN106711782A (en) * | 2017-03-21 | 2017-05-24 | 赵文林 | Damping-type energy-saving power cabinet |
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| CN110142236A (en) * | 2019-05-05 | 2019-08-20 | 郑州大学 | A kind of automatic flushing device for hydraulic engineering plate steel flashboard |
| CN209419056U (en) * | 2019-02-25 | 2019-09-20 | 沈阳鑫中兴防爆电器有限公司 | A kind of explosion-proof electrical distribution box with dedusting function |
| CN110355168A (en) * | 2019-08-16 | 2019-10-22 | 立昌科技（赣州）有限公司 | A kind of powdery paints special barrel Quick cleaning device |
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| JPH04190607A (en) * | 1990-11-22 | 1992-07-09 | Hitachi Ltd | Enclosed switch-board and its shutter |
| CN106711782A (en) * | 2017-03-21 | 2017-05-24 | 赵文林 | Damping-type energy-saving power cabinet |
| CN207368491U (en) * | 2017-09-29 | 2018-05-15 | 贵阳佳峰电器设备有限公司 | It is a kind of can automatic dust removing and heat dissipation distribution box |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111416292A (en) * | 2020-05-19 | 2020-07-14 | 安徽同胜电力科技有限公司 | A exhaust device that is used for switch board cooling to use adjustable angle |
| CN113964662A (en) * | 2021-09-18 | 2022-01-21 | 天津市威匡电气设备有限公司 | Novel light current switch board device |
| CN113964662B (en) * | 2021-09-18 | 2024-03-12 | 天津市威匡电气设备有限公司 | Novel weak current switch board device |
| CN117117686A (en) * | 2023-08-29 | 2023-11-24 | 河北万庆电力器材科技有限公司 | Block terminal with high-efficient heat radiation structure |
| CN117117686B (en) * | 2023-08-29 | 2024-03-12 | 河北万庆电力器材科技有限公司 | Block terminal with high-efficient heat radiation structure |
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|---|---|
| CN110880697B (en) | 2021-08-24 |
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