CN113257150B - Electronic information display column - Google Patents

Electronic information display column Download PDF

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Publication number
CN113257150B
CN113257150B CN202110803354.XA CN202110803354A CN113257150B CN 113257150 B CN113257150 B CN 113257150B CN 202110803354 A CN202110803354 A CN 202110803354A CN 113257150 B CN113257150 B CN 113257150B
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CN
China
Prior art keywords
frame body
electronic information
information display
shaft
transmission piece
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Active
Application number
CN202110803354.XA
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Chinese (zh)
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CN113257150A (en
Inventor
李明利
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Shandong Vocational College of Science and Technology
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Shandong Vocational College of Science and Technology
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Application filed by Shandong Vocational College of Science and Technology filed Critical Shandong Vocational College of Science and Technology
Priority to CN202110803354.XA priority Critical patent/CN113257150B/en
Publication of CN113257150A publication Critical patent/CN113257150A/en
Application granted granted Critical
Publication of CN113257150B publication Critical patent/CN113257150B/en
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Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00Constructional details common to different types of electric apparatus
    • H05K7/20Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20954Modifications to facilitate cooling, ventilating, or heating for display panels
    • H05K7/20972Forced ventilation, e.g. on heat dissipaters coupled to components

Abstract

The invention is suitable for the technical field of publicity columns, and provides an electronic information display column, which comprises: the LED display is fixedly connected with the frame body, the LED display is arranged in the frame body, the exhaust assembly is fixedly connected with the frame body, the exhaust assembly utilizes wind energy as a power source, and the air in the frame body can be discharged upwards through forward and reverse rotation of the exhaust assembly. Therefore, the electronic information display column is simple in structure, the outside natural wind is used as power, the hot air in the electronic information display column is discharged upwards, the internal air circulation of the electronic information display column is increased, the temperature of the electronic information display column is reduced, energy is saved, and the service life of the electronic information display column is prolonged.

Description

Electronic information display column
Technical Field
The invention relates to the technical field of publicity columns, in particular to an electronic information display column.
Background
Electronic information show fence uses for a long time, can appear the phenomenon of seriously generating heat, influence the life of inside components and parts, the radiating mode of fan has been adopted among the prior art, specific way is to install radiator fan additional in the frame of LED screen backshell, make the chip obtain radiating effect through radiator fan, but radiator fan generally relies on electric drive, energy resource consumption is great, when electronic information show fence uses in the open air, outdoor temperature often is less than the temperature of electronic information show fence, but because sheltering from of publicity column framework, cause the unable effectual inside components and parts cooling of giving of wind of nature, and the wind direction of nature is uncontrollable, unable reasonable wind energy cooling that utilizes, the temperature rise of electronic information show fence has aggravated again in sun simultaneously, make radiator fan continuously work for a long time, the energy consumption has been bigger.
In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.
Disclosure of Invention
In view of the above-mentioned drawbacks, an object of the present invention is to provide an electronic information display board, which has a simple structure, and utilizes the external natural wind as the power to discharge the internal air of the electronic information display board all the time, thereby increasing the internal air circulation of the electronic information display board, reducing the temperature of the electronic information display board, saving resources, and prolonging the service life of the electronic information display board.
In order to achieve the above object, the present invention provides an electronic information display bar, comprising: the LED display is fixedly connected with the frame body, the LED display is arranged in the frame body, the exhaust assembly is fixedly connected with the frame body, and the exhaust assembly is positioned above the frame body; the air exhaust assembly utilizes wind energy as a power source, and the air in the frame can be exhausted upwards through forward and reverse rotation of the air exhaust assembly; the subassembly of airing exhaust includes:
elevating system, its fixed connection the framework, elevating system includes:
the fan blade assembly comprises a driving shaft, a fan blade and a fan blade, wherein the driving shaft is provided with a positioning bulge, the top end of the driving shaft is provided with a first fan blade, and the bottom end of the driving shaft is provided with a first switching block;
the shaft sleeve is fixedly connected with the outer side above the frame body, is sleeved with the driving shaft and is positioned in the middle of the driving shaft; a spiral groove is formed in the shaft sleeve corresponding to the positioning bulge, and horizontal annular grooves are formed in two ends of the spiral groove; a guide plate is arranged at the joint of the spiral groove and the annular groove, the guide plate is arranged along the extending direction of the spiral groove, and the guide plate is connected with the shaft sleeve through a torsion spring;
reversing mechanism, its fixed connection the framework, reversing mechanism is located the elevating system below, reversing mechanism includes:
the upper transmission piece is rotatably connected with the frame body, the driving shaft is connected with the upper transmission piece in a sliding mode, and the upper transmission piece is located below the shaft sleeve;
the lower transmission part is rotatably connected with the frame body, a driven shaft is arranged below the lower transmission part, and a second fan blade is arranged at the tail end of the driven shaft and is positioned in the frame body;
the side transmission shaft is fixedly connected with the frame body, an upper gear of the side transmission shaft is connected with the upper transmission piece, and the lower part of the side transmission shaft is connected with the driven shaft through a belt;
the upper transmission piece and the lower transmission piece are arranged oppositely from top to bottom, the upper transmission piece and the lower transmission piece are both provided with interfaces, the interfaces are arranged corresponding to the first switching blocks, and the first switching blocks are located between the upper transmission piece and the lower transmission piece.
According to the electronic information display column, the upper part and the lower part of the first switching block are both in frustum structures.
According to the electronic information display column, the positioning bulge is of a cylindrical structure.
According to the electronic information display column, the size of the annular groove is slightly larger than that of the positioning protrusion.
According to the electronic information display column, the gap between the guide plate and the annular groove is smaller than the radius of the positioning protrusion.
According to the electronic information display column, the guide plate is provided with the limiting step, and the limiting step ensures that the rotating range of the guide plate is positioned in the spiral groove.
The invention adopts wind energy in nature as power, and utilizes the reversing mechanism and the lifting mechanism to ensure that the second fan blade always keeps the outward air exhaust state no matter how the first fan blade rotates, thereby reducing the temperature of the LED display, reducing the energy consumption of the cooling fan, and having simple structure and low use cost.
Drawings
FIG. 1 is a schematic view of the external structure of the present invention; FIG. 2 is a schematic view of the construction of the venting assembly of the present invention; FIG. 3 is a schematic cross-sectional view of the venting assembly of the present invention; FIG. 4 is a schematic view showing the construction of the driving shaft of the present invention; FIG. 5 is a schematic view of the construction of the bushing of the present invention; FIG. 6 is a schematic view of detail A of the sleeve of the present invention; in the figure, 1-frame, 2-LED display, 3-air exhaust assembly, 31-lifting mechanism, 311-driving shaft, 3111-positioning protrusion, 312-shaft sleeve, 3121-annular groove, 3122-spiral groove, 3123-guide plate, 3124-limit step, 3125-chamfer, 313-first switching block, 314-first fan blade, 32-reversing mechanism, 321-upper transmission member, 3211-first interface, 322-lower transmission member, 323-side transmission shaft, 324-second fan blade.
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 the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the present invention provides an electronic information display bar. This electronic information shows fence includes: framework 1, LED display 2 and air exhaust component 3, LED display 2 fixed connection is in framework 1, air exhaust component 3 fixed connection framework 1, framework 1 encircles the ventilation hole around air exhaust component 3, be equipped with the filter screen in the ventilation hole, be used for stopping the dust and get into in framework 1 through the ventilation hole, air exhaust component 3 is located the upper portion of framework 1, air exhaust component 3 adopts natural wind as power, the wind direction of natural wind is uncontrollable, but when air exhaust component 3 forward or reverse rotation, air exhaust component 3 homoenergetic upwards discharges the steam in framework 1, air exhaust component 3 is air exhaust when forward rotation can not appear, the phenomenon of blast air in to framework 1 when reverse rotation. When the electronic information display column is used for a long time, a large amount of heat can be generated by electronic components, the service life of the electronic components is seriously influenced, when the temperature exceeds a set value, the heat dissipation fan of the LED display 2 can dissipate heat forcibly, the heat dissipation fan adopts a power supply as power, the energy consumption is large when the electronic information display column is used for a long time, the air exhaust component 3 exhausts hot air in the frame body 1 to the outside by utilizing the wind energy in the nature, the air flow in the frame body 1 is increased, the temperature of the LED display 2 is reduced, the time that the temperature of the LED display 2 reaches the set value is delayed, the operation time and frequency of the heat dissipation fan are reduced, and the consumption of the power supply is reduced.
Referring to fig. 2, the exhaust assembly 3 includes a lifting mechanism 31 and a reversing mechanism 32, both the lifting mechanism 31 and the reversing mechanism 32 are fixedly connected to the frame 1, and referring to fig. 4, the lifting mechanism 31 includes: the driving shaft 311 is arranged in the shaft sleeve 312, the shaft sleeve 312 is fixedly connected to the outer side above the frame body 1, the shaft sleeve 312 is sleeved on the driving shaft 311, the shaft sleeve 312 is located in the middle of the driving shaft 311, the driving shaft 311 is provided with a positioning protrusion 3111, the shaft sleeve 312 is provided with two annular grooves 3121 and two spiral grooves 3122 corresponding to the positioning protrusion 3111, the number of the annular grooves 3121 is two, the two annular grooves 3121 are respectively located at the upper end and the lower end of the shaft sleeve 312, the spiral grooves 3122 are horizontally arranged, the spiral grooves 3122 are located between the two annular grooves 3121, the two ends of the spiral grooves 3122 are parallel to each other, the directions are opposite, the spiral grooves 3122 intersect with the annular grooves 3121, in combination with fig. 5, a guide plate 3123 is arranged at the intersection of the spiral grooves 3122 and the guide plate 3123 is arranged along the extending direction of the spiral grooves 3122, the guide plate 3123 is axially connected with the shaft sleeve 312, the guide plate 3123 is connected with the shaft sleeve 312 through a torsion spring, the guide plate 3123 is under the action of the torsion spring, stationary in the tangential direction of the spiral groove 3122. The guide plate 3123 can only rotate within a certain range, which ensures that the positioning protrusion 3111 can only rotate within the annular groove 3121, and when the rotation range is exceeded, the guide plate 3123 is abutted against the sleeve 312 and is not moved, and the positioning protrusion 3111 enters the spiral groove 3122 through the guide plate 3123 and then enters another annular groove 3121. The first switch block 313 is fixedly connected to the lower side of the driving shaft 311, and the first vane 314 is fixedly connected to the upper side of the driving shaft 311. In a normal state, the positioning protrusion 3111 generally depends on the self weight of the driving shaft 311 and falls into the lower annular groove 3121, when the first vane 314 rotates clockwise, the positioning protrusion 3111 and the guide plate 3123 cooperate with each other, so that the driving shaft 311 spirally ascends and finally rotates in the upper annular groove 3121, and when the first vane 314 rotates counterclockwise, the positioning protrusion 3111 and the guide plate 3123 cooperate with each other, so that the driving shaft 311 spirally descends and finally rotates in the lower annular groove 3121.
Referring to fig. 3, the reversing mechanism 32 includes: the fan frame comprises an upper transmission piece 321, a lower transmission piece 322, a side transmission shaft 323 and a second fan blade 324, wherein the upper transmission piece 321 and the lower transmission piece 322 are arranged oppositely up and down, the upper transmission piece 321 and the lower transmission piece 322 are both fixedly connected to the frame body 1, a first switching block 313 is positioned between the upper transmission piece 321 and the lower transmission piece 322, the upper transmission piece 321 and the lower transmission piece 322 are both provided with a first interface 3211, and the shape of the first interface 3211 is matched with that of the first switching block 313. The distance between the upper transmission member 321 and the lower transmission member 322 is adapted to the distance between the upper annular groove 3121 and the lower annular groove 3121, when the positioning protrusion 3111 slides in the upper annular groove 3121, the first switching block 313 and the upper transmission member 321 synchronously cooperate and rotate, and when the positioning protrusion 3111 slides in the lower annular groove 3121, the first switching block 313 and the lower transmission member 322 synchronously cooperate and rotate. The end of the lower transmission member 322 is fixedly connected to the second blade 324, and the second blade 324 is located inside the frame 1. When the second fan blade 324 is set to rotate forwards, air is blown to the outside of the frame body 1, when the second fan blade is turned over, air is blown to the inside of the frame body 1, the side transmission shaft 323 is fixedly connected with the frame body 1, the side transmission shaft 323 is positioned on one side of the upper transmission piece 321 and the lower transmission piece 322, the upper end of the side transmission shaft 323 is in gear engagement with the upper transmission piece 321, and the lower end of the side transmission shaft 323 is in belt rotation connection with the lower transmission piece 322. The driving shaft 311 has two rotation modes: when the driving shaft 311 rotates clockwise, the first switching block 313 rises to be matched with the upper transmission part 321 to rotate synchronously, the upper transmission part 321 is meshed with the transmission side transmission shaft 323 through a gear, the rotation direction of the side transmission shaft 323 is opposite to that of the driving shaft 311, the side transmission shaft 323 is connected with the lower transmission part 322 through a belt in a rotating way, and the rotation direction of the side transmission shaft 323 is the same as that of the lower transmission part 322 to drive the second fan blade 324 to rotate anticlockwise; secondly, when the driving shaft 311 rotates counterclockwise, the first switching block 313 descends to cooperate with the lower transmission member 322 to rotate synchronously, the lower transmission member 322 drives the second fan blade 324 to rotate counterclockwise, and at this time, the upper transmission member 321 is in an idle state through the transmission function of the side transmission shaft 323. The blowing direction of the second blades 324 faces the outside of the housing 1.
Further, the upper portion and the lower portion of the first switching block 313 are both frustum structures, and the first connector 3211 is a taper hole structure corresponding to the frustum structures, and the two are driven by friction engagement.
Furthermore, elastic materials, preferably rubber, are arranged on the surfaces of the frustum structure and the taper hole structure, so that the friction force of the frustum structure and the taper hole structure can be increased, and the transmission effect is improved.
Further, the size of the annular groove 3121 is slightly larger than the size of the positioning protrusion 3111, so that the positioning protrusion 3111 rotates in the horizontal direction in the annular groove 3121, the vertical jumping is reduced, and the rotation of the driving shaft 311 is more stable.
Further, the size of the gap between the guide plate 3123 and the annular groove 3121 is smaller than the radius of the positioning protrusion 3111, so that the guide plate 3123 guides the positioning protrusion 3111 into the spiral groove 3122 when the positioning protrusion 3111 rotates in the reverse direction. When the size of the gap between the guide plate 3123 and the annular groove 3121 is larger than the radius size of the positioning protrusion 3111 and is smaller than the diameter size of the positioning protrusion 3111, the positioning protrusion 3111 is easily caught between the guide plate 3123 and the annular groove 3121, resulting in stalling of the drive shaft 311. When the size of the gap between the guide plate 3123 and the annular groove 3121 is greater than the diameter of the positioning protrusion 3111, the guide plate 3123 cannot contact the positioning protrusion 3111, which results in the rotation of the driving shaft 311, driving the second fan blade 324 to rotate in the opposite direction, and changing the blowing direction, which is not favorable for heat dissipation.
Furthermore, the positioning protrusion 3111 is cylindrical, and the end of the positioning protrusion 3111 is provided with a bearing, so that friction between the positioning protrusion 3111 and the annular groove 3121 and the spiral groove 3122 can be reduced, and the service life of the positioning protrusion 3111 can be prolonged.
Referring to fig. 6, further, the sleeve 312 is provided with a limit step 3124 to ensure that the stationary direction of the guide plate 3123 is along the tangential direction of the spiral groove 3122, and the rotation range of the guide plate 3123 is located inside the spiral groove 3122, so as to prevent the guide plate 3123 from rotating reversely and being unable to guide the positioning protrusion 3111.
Further, the opposite spiral groove 3122 of the guide plate 3123 is provided with a chamfer 3125, ensuring that the positioning projection 3111 is excessively smoothed between the spiral groove 3122 and the annular groove 3121, while increasing the reliability of the guide.
This electronic information show fence is when outdoor use, when wind blows, first flabellum 314 drives driving shaft 311 and rotates, and the rotation direction of first flabellum 314 this moment has two kinds of circumstances:
first, the first fan blade 314 rotates clockwise, the driving shaft 311 rotates clockwise, the positioning protrusion 3111 is matched with the guide plate 3123, so that the positioning protrusion 3111 slides in the annular groove 3121 at the upper part, the first switching block 313 ascends to be matched with the upper transmission member 321 to rotate synchronously, the upper transmission member 321 is meshed with the transmission side transmission shaft 323 through a gear, the rotation direction of the side transmission shaft 323 is opposite to that of the driving shaft 311, the side transmission shaft 323 rotates anticlockwise, the side transmission shaft 323 is connected with the lower transmission member 322 through a belt in a rotating manner, and the rotation direction of the side transmission shaft 323 is the same as that of the lower transmission member 322, so as to drive the second fan blade 324 to rotate anticlockwise;
second, the first fan blade 314 rotates counterclockwise, the driving shaft 311 rotates counterclockwise, the positioning protrusion 3111 is matched with the guide plate 3123, so that the positioning protrusion 3111 slides in the annular groove 3121 at the lower portion, the first switching block 313 descends, is matched with the lower transmission member 322, rotates synchronously, the lower transmission member 322 drives the second fan blade 324 to rotate counterclockwise, and at this time, the upper transmission member 321 is in an idle state through the transmission effect of the side transmission shaft 323.
The fins of the second fan blade 324 are arranged to blow air outwards when rotating anticlockwise, that is, no matter how the first fan blade 314 rotates, the second fan blade 324 exhausts air anticlockwise all the time, so that the air exhaust effect is ensured, the air flow in the frame body 1 is increased, the temperature rise time of the LED display 2 is prolonged, the use of a heat radiation fan is reduced, and the power resource is saved.
In summary, the invention adopts natural wind energy as power, and utilizes the reversing mechanism and the lifting mechanism to enable the second fan blade to always keep the outward air exhaust state no matter how the first fan blade rotates, thereby reducing the temperature of the LED display, reducing the energy consumption of the heat radiation fan, and having simple structure and low use cost.
In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (6)

1. An electronic information display board, comprising: the LED display is fixedly connected with the frame body, the LED display is arranged in the frame body, the exhaust assembly is fixedly connected with the frame body, and the exhaust assembly is positioned above the frame body; the air exhaust assembly utilizes wind energy as a power source, and the air in the frame can be exhausted upwards through forward and reverse rotation of the air exhaust assembly; the subassembly of airing exhaust includes:
elevating system, its fixed connection the framework, elevating system includes:
the fan blade assembly comprises a driving shaft, a fan blade and a fan blade, wherein the driving shaft is provided with a positioning bulge, the top end of the driving shaft is provided with a first fan blade, and the bottom end of the driving shaft is provided with a first switching block;
the shaft sleeve is fixedly connected with the outer side above the frame body, is sleeved with the driving shaft and is positioned in the middle of the driving shaft; a spiral groove is formed in the shaft sleeve corresponding to the positioning bulge, and horizontal annular grooves are formed in two ends of the spiral groove; a guide plate is arranged at the joint of the spiral groove and the annular groove, the guide plate is arranged along the extending direction of the spiral groove, and the guide plate is connected with the shaft sleeve through a torsion spring;
reversing mechanism, its fixed connection the framework, reversing mechanism is located the elevating system below, reversing mechanism includes:
the upper transmission piece is rotatably connected with the frame body, the driving shaft is connected with the upper transmission piece in a sliding mode, and the upper transmission piece is located below the shaft sleeve;
the lower transmission part is rotatably connected with the frame body, a driven shaft is arranged below the lower transmission part, and a second fan blade is arranged at the tail end of the driven shaft and is positioned in the frame body;
the side transmission shaft is fixedly connected with the frame body, an upper gear of the side transmission shaft is connected with the upper transmission piece, and the lower part of the side transmission shaft is connected with the driven shaft through a belt;
the upper transmission piece and the lower transmission piece are arranged oppositely from top to bottom, the upper transmission piece and the lower transmission piece are both provided with interfaces, the interfaces are arranged corresponding to the first switching blocks, and the first switching blocks are located between the upper transmission piece and the lower transmission piece.
2. The electronic information display board of claim 1, wherein the upper portion and the lower portion of the first switching block are both frustum structures.
3. The electronic information display sign of claim 1, wherein the positioning protrusion is a cylindrical structure.
4. The electronic information display sign of claim 1, wherein the annular groove is sized slightly larger than the positioning protrusion.
5. The electronic information display sign according to claim 1, wherein a gap between the guide plate and the annular groove is smaller than a radius of the positioning protrusion.
6. The electronic information display board of claim 1, wherein the shaft sleeve is provided with a limit step, and the limit step ensures that the rotation range of the guide plate is located inside the spiral groove.
CN202110803354.XA 2021-07-16 2021-07-16 Electronic information display column Active CN113257150B (en)

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Application Number Priority Date Filing Date Title
CN202110803354.XA CN113257150B (en) 2021-07-16 2021-07-16 Electronic information display column

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Application Number Priority Date Filing Date Title
CN202110803354.XA CN113257150B (en) 2021-07-16 2021-07-16 Electronic information display column

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CN113257150B true CN113257150B (en) 2021-09-17

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2182502A1 (en) * 2007-08-20 2010-05-05 Mitsubishi Electric Corporation Display device
CN105351220A (en) * 2015-10-30 2016-02-24 东莞理工学院 Cooling tower driven through combination of vertical axis wind force rotating machine and motor and control method
CN109854465A (en) * 2019-03-12 2019-06-07 东北大学 A kind of wind turbine cabin radiator using oscillating heat pipe
CN211429846U (en) * 2019-11-13 2020-09-04 河北邮电通信工程建设监理有限公司 Power-saving control device for communication engineering
CN111786435A (en) * 2020-07-14 2020-10-16 厦门聚财钱网络科技有限公司 Outdoor wind energy self-generating charging cabinet
CN212012153U (en) * 2020-05-25 2020-11-24 郑州易能科技有限公司 Low-voltage reactive compensation control box
CN112134187A (en) * 2020-09-29 2020-12-25 杭州服道乐电子商务有限公司 Energy-saving environment-friendly power distribution cabinet ventilation device utilizing wind energy
CN212231864U (en) * 2020-05-27 2020-12-25 范江英 Outdoor communication equipment is with assembling rack of preventing wind

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2182502A1 (en) * 2007-08-20 2010-05-05 Mitsubishi Electric Corporation Display device
CN105351220A (en) * 2015-10-30 2016-02-24 东莞理工学院 Cooling tower driven through combination of vertical axis wind force rotating machine and motor and control method
CN109854465A (en) * 2019-03-12 2019-06-07 东北大学 A kind of wind turbine cabin radiator using oscillating heat pipe
CN211429846U (en) * 2019-11-13 2020-09-04 河北邮电通信工程建设监理有限公司 Power-saving control device for communication engineering
CN212012153U (en) * 2020-05-25 2020-11-24 郑州易能科技有限公司 Low-voltage reactive compensation control box
CN212231864U (en) * 2020-05-27 2020-12-25 范江英 Outdoor communication equipment is with assembling rack of preventing wind
CN111786435A (en) * 2020-07-14 2020-10-16 厦门聚财钱网络科技有限公司 Outdoor wind energy self-generating charging cabinet
CN112134187A (en) * 2020-09-29 2020-12-25 杭州服道乐电子商务有限公司 Energy-saving environment-friendly power distribution cabinet ventilation device utilizing wind energy

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