CN111525424A - Heat radiation system for high-low voltage complete set of distribution equipment - Google Patents
Heat radiation system for high-low voltage complete set of distribution equipment Download PDFInfo
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- CN111525424A CN111525424A CN202010535048.8A CN202010535048A CN111525424A CN 111525424 A CN111525424 A CN 111525424A CN 202010535048 A CN202010535048 A CN 202010535048A CN 111525424 A CN111525424 A CN 111525424A
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- 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
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Abstract
The invention discloses a heat dissipation system for high-voltage and low-voltage complete set power distribution equipment, which belongs to the field of electricity and comprises a box body, wherein the bottom of the box body is connected with a cooling box in a sliding mode, cooling liquid is added into the cooling box, the inner top wall of the cooling box is fixedly connected with two partition plates and two baffle plates, the two baffle plates are respectively positioned on the opposite sides of the two partition plates, and air guide pipes fixedly connected with the two baffle plates are inserted into the two baffle plates. The heat-conducting plate is a metal plate, so that heat inside the box body can be conducted and dispersed, the temperature inside the box body is more uniform, heat concentration is avoided, high temperature is avoided, and the use safety of the complete set of power distribution equipment is improved.
Description
Technical Field
The invention relates to the field of electricity, in particular to a heat dissipation system for high-voltage and low-voltage complete power distribution equipment.
Background
The high-voltage complete equipment (high-voltage power distribution cabinet) is indoor and outdoor alternating current switch equipment which operates in a power system with voltage of 3kV or above and frequency of 50Hz or below, is mainly used for controlling and protecting the power system (including users such as power plants, transformer substations, power transmission and distribution lines, industrial and mining enterprises and the like), can be used for not only putting a part of power equipment or lines into or out of operation according to the operation requirements of a power grid, but also can be used for quickly cutting off a fault part from the power grid when the power equipment or lines have faults, so that the normal operation of the fault-free part in the power grid and the safety of equipment and operation maintenance personnel are ensured, therefore, the high-voltage complete equipment is very important power transmission and distribution equipment, and the safe and reliable operation of the high-voltage complete equipment has very important significance on; the low-voltage equipment set refers to equipment used in voltage levels of 380V and below, the latter is considered from the safety point of view, but the two are not contradictory, because in a power distribution system, the low-voltage equipment refers to a 380V power distribution system, and therefore, in actual work, the low-voltage equipment set refers to equipment used in voltage levels of 380V and below.
When a complete set of power distribution equipment is used, electric energy loss is often caused and converted into heat energy due to reasons such as resistance, if the heat on the power distribution equipment is not discharged and dissipated in time, the service life of the equipment can be affected, and fire and other problems can be caused in serious cases.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a heat dissipation system for high-voltage and low-voltage complete power distribution equipment, which has the advantage of better heat dissipation effect and solves the problems that the heat dissipation system of the existing power distribution equipment only uses a heat dissipation fan for heat dissipation, the heat dissipation effect is poor, and the equipment still runs at high temperature.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A heat dissipation system for high-low voltage complete set distribution equipment comprises a box body, wherein the bottom of the box body is connected with a cooling box in a sliding manner, cooling liquid is added into the cooling box, the inner top wall of the cooling box is fixedly connected with two partition plates and two baffle plates, the two baffle plates are respectively positioned on one side of the two partition plates which are back to back, air guide pipes fixedly connected with the two baffle plates are inserted into the two baffle plates, one ends of the two air guide pipes which are back to back sequentially penetrate through the cooling box and the box body and extend to the outer side of the box body, an exhaust fan is fixedly installed at the top of the cooling box, a heat conduction plate is fixedly connected with the inner wall of the box body, a through pipe is fixedly connected at the top of the exhaust fan, air guide holes which are arranged equidistantly are formed in the heat conduction plate, moisture absorption devices are fixedly connected at the bottom, two evenly distributed's louvre is all seted up to the relative one end of heat-conducting plate, the one end and the air guide hole of louvre are linked together, the top fixed mounting of box has out the fan, the equal fixed mounting in the left and right sides of box has the air exhauster, two the one end that the air duct kept away from mutually respectively with two air exhauster fixed connection.
Preferably, the air duct includes spiral portion and straight tube portion, spiral portion is located two one side that the baffle carried on the back mutually, the one end and the straight tube portion integrated into one piece that the spiral portion is close to the baffle, the one end that the spiral portion was kept away from in the straight tube portion runs through the baffle and extends to between baffle and the baffle.
Preferably, the opposite sides of the two heat conducting plates are fixedly connected with radiating fins which are arranged equidistantly, and the radiating holes are positioned between the two adjacent radiating fins.
Preferably, the front face of the cooling box is fixedly connected with three oil injection pipes, the two opposite ends of the air guide pipes are fixedly connected with dispersion balls, and the dispersion balls are provided with air outlets which are uniformly distributed.
Preferably, the moisture absorption device comprises a moisture absorption box, the moisture absorption box is fixedly provided with moisture absorption cotton and two separation nets in the moisture absorption box, and the two separation nets are filled with activated carbon.
Preferably, the bar is led to the groove all has been seted up to the left and right sides of box, the groove of taking out that is linked together is led to the groove rather than inside and bar is seted up at the back of box, the back of cooling box extends to the inboard of taking out the groove, two the air duct extends to the outside of box through two bar logical grooves respectively.
Preferably, the outside fixedly connected with insulating layer of box, the homogeneous body shaping in the left and right sides of cooling box has the sealing strip, two the sealing strip is located the inboard in two bar logical grooves respectively.
Preferably, the penetrating position of the air guide pipe and the baffle is fixedly provided with a sealing ring, the heat conducting plate is made of aluminum alloy, and the radiating fins are made of copper.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) the scheme is that the exhaust fans on two sides of the box body are electrified to work, air outside the box body is pumped to the air guide pipe to be transmitted, the air guide pipe passes through the inside of the cooling box, so that the air and cooling liquid inside the cooling box can exchange heat and cool, then the air is directly discharged from the cooling liquid through the air guide pipe, further and sufficiently exchanges heat with the cooling liquid, then the air is guided into the moisture absorption device through the through pipe to absorb moisture, the problems of equipment corrosion and the like caused by the moisture entering the distribution equipment are avoided, then the air is dispersed through the air guide holes in the heat conduction plate, so that the temperature of the complete set of distribution equipment inside the box body is cooled, then the air after heat exchange is discharged through the air outlet fan at the top of the box body, the heat dissipation effect is better, the phenomenon that the operation of the equipment is influenced by overhigh temperature of, improve complete set distribution equipment's life, simultaneously because the heat-conducting plate is the metal sheet, can conduct the dispersion with the inside heat of box, let the inside temperature of box more even, avoid the heat to concentrate, and then avoid the production of high temperature, improve complete set distribution equipment's safety in utilization.
(2) According to the scheme, the air guide pipe is divided into the spiral part and the straight pipe part, and the spiral part and the straight pipe part are immersed below the cooling liquid level, so that heat exchange can be carried out when air passes through the air guide pipe, the spiral part can prolong the heat dissipation time, the cooling effect is improved, the air of the straight pipe part is further discharged from the cooling liquid to be subjected to heat exchange with the cooling liquid, and the heat dissipation and cooling effect of the heat dissipation system is improved.
(3) This scheme, the fin can promote the heat conductivility of heat-conducting plate, because expend with heat and contract with cold keep away from, and the cold air that the hot-air rises descends, leads to the temperature layering in the box, and inhomogeneous and lead to the temperature too concentrated production high temperature easily, utilizes the fin can influence the top and cool down to it with the low temperature of bottom, and the cooling system's that makes heat-sinking capability is even reliable.
(4) This scheme, through the convenient inside of cooling box of changing the coolant liquid that adds of three notes oil pipe to guarantee to the cooling work of air, utilize the dispersion ball to let air duct spun air pass through the venthole dispersion, improve the area of contact with the coolant liquid, reinforcing heat transfer effect.
(5) This scheme, the moisture absorption in the moisture absorption box is cotton and two separate the moisture of active carbon in with the air between the net and adsorb, avoids the moisture to get into the inside equipment corrosion and other problems that cause of distribution equipment.
(6) This scheme, take out the groove and conveniently take the cooling box out the air exhauster from the box and demolish, the air duct can follow taking out of cooling box and activity through the bar leads to the groove, and the person of facilitating the use is dismantled cooling body's installation.
(7) This scheme, because complete set distribution equipment's use all is a plurality of cooperations and uses, can avoid the external environment to cause the influence to the inside of box through the insulating layer, guaranteed cooling system's heat dissipation cooling effect.
(8) This scheme, kneck through the sealed air duct of sealing washer and baffle prevents that the coolant liquid from mixing, leads to the coolant liquid level between two baffles to change, and aluminum alloy and copper all possess good radiating effect, can play the heat conduction effect.
Drawings
FIG. 1 is a front cross-sectional structural schematic view of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a rear view of the present invention;
FIG. 4 is an enlarged view of portion A of FIG. 1 according to the present invention;
FIG. 5 is an enlarged view of the portion B of FIG. 1 according to the present invention.
The reference numbers in the figures illustrate:
1. a box body; 2. a cooling box; 3. a partition plate; 4. a baffle plate; 5. an air duct; 51. a spiral portion; 52. a straight tube portion; 6. an exhaust fan; 7. a heat conducting plate; 8. pipe passing; 9. an air vent; 10. heat dissipation holes; 11. a fan outlet; 12. an exhaust fan; 13. a moisture absorption device; 131. a moisture-absorbing box; 132. moisture absorption cotton; 133. separating the net; 14. a heat sink; 15. an oil filling pipe; 16. dispersing the balls; 17. a strip-shaped through groove; 18. drawing the groove; 19. a thermal insulation layer; 20. a sealing strip; 21. and (5) sealing rings.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-5, a heat dissipation system for high-low voltage complete set of power distribution equipment comprises a box body 1, a cooling box 2 is slidably connected to the bottom of the box body 1, a cooling liquid is added into the cooling box 2, two partition plates 3 and two baffle plates 4 are fixedly connected to the inner top wall of the cooling box 2, the two baffle plates 4 are respectively located at the opposite sides of the two partition plates 3, air ducts 5 fixedly connected to the two baffle plates 4 are respectively inserted into the two baffle plates 4, the opposite ends of the two air ducts 5 sequentially penetrate through the cooling box 2 and the box body 1 and extend to the outer side of the box body 1, an exhaust fan 6 is fixedly installed at the top of the cooling box 2, a heat conduction plate 7 is fixedly connected to the inner wall of the box body 1, a through pipe 8 is fixedly connected to the top of the exhaust fan 6, air guide holes 9 arranged at equal intervals are formed in the heat conduction plate 7, moisture absorption devices 13 are fixedly connected to, the opposite ends of the two heat conducting plates 7 are respectively provided with a heat dissipation hole 10 which are uniformly distributed, one end of each heat dissipation hole 10 is communicated with an air guide hole 9, the top of the box body 1 is fixedly provided with a fan 11, the left side and the right side of the box body 1 are respectively fixedly provided with an exhaust fan 12, the ends, far away from the two air guide pipes 5, of the two air guide pipes 5 are respectively fixedly connected with the two exhaust fans 12, the exhaust fans 12 on the two sides of the box body 1 are electrified to work, air outside the box body 1 is pumped to the air guide pipes 5 to be transmitted, the air guide pipes 5 pass through the inside of the cooling box 2, so that the air and cooling liquid inside the cooling box 2 are subjected to heat exchange and temperature reduction, then the air is directly discharged from the cooling liquid through the air guide pipes 5, further and fully subjected to heat exchange with the cooling liquid, then the air is guided, then disperse through the inside air guide hole 9 of heat-conducting plate 7, and then cool down the temperature of the complete set distribution equipment inside box 1, then the air after the heat transfer is discharged through box 1 top fan 11 again, the radiating effect is better, avoid complete set distribution equipment's high temperature and influence the operation of equipment, prevent the circuit burning, improve complete set distribution equipment's life, simultaneously because heat-conducting plate 7 is the metal sheet, can conduct the dispersion with the inside heat of box 1, let the inside temperature of box 1 more even, avoid the heat to concentrate, and then avoid the production of high temperature, improve complete set distribution equipment's safety in utilization.
Further, the air duct 5 includes spiral part 51 and straight tube portion 52, spiral part 51 is located the one side that two baffles 4 carried on the back mutually, spiral part 51 is close to the one end and the straight tube portion 52 integrated into one piece of baffle 4, straight tube portion 52 is kept away from the one end of spiral part 51 and is run through baffle 4 and extend to between baffle 3 and the baffle 4, because the air duct 5 is divided into spiral part 51 and straight tube portion 52, and spiral part 51 and straight tube portion 52 all submerge below the coolant level, and then the air can carry out the heat transfer when passing through, and spiral part 51 can increase the heat dissipation time, improve the cooling effect, 52 air of straight tube portion further carry out the heat transfer with the coolant liquid from discharging in the coolant liquid, improve cooling system's heat dissipation cooling effect.
Further, the fin 14 that two heat-conducting plates 7 one side fixedly connected with equidistance were arranged, louvre 10 is located between two adjacent fins 14, fin 14 can promote heat-conducting plate 7's heat conductivility, because expend with heat and contract with cold and keep away from, the cold air descends that the hot-air rises, lead to the temperature layering in the box 1, inhomogeneous and lead to the temperature too concentrated to produce high temperature easily, utilize fin 14 can influence the top and cool down it with the low temperature of bottom, the cooling system's that makes heat-sinking capability is even reliable.
Further, the three oiling pipe 15 of positive fixedly connected with of cooling box 2, the equal fixedly connected with dispersion ball 16 of the one end that two air ducts 5 are relative, set up evenly distributed's venthole on the dispersion ball 16, conveniently add the change coolant liquid to the inside of cooling box 2 through three oiling pipe 15, so that guarantee to the cooling work of air, utilize dispersion ball 16 can let air duct 5 spun air pass through the venthole dispersion, improve with the area of contact of coolant liquid, reinforcing heat transfer effect.
Furthermore, the moisture absorption device 13 includes a moisture absorption box 131, the moisture absorption cotton 132 and two separation nets 133 are fixedly installed inside the moisture absorption box 131, activated carbon is filled between the two separation nets 133, the moisture absorption cotton 132 in the moisture absorption box 131 and the activated carbon between the two separation nets 133 adsorb moisture in the air, and the problems of equipment corrosion and the like caused by the moisture entering the inside of the power distribution equipment are avoided.
Further, the groove 17 is led to in the bar has all been seted up to the left and right sides of box 1, the groove 18 of taking out that is linked together rather than inside and the groove 17 is led to in the bar is seted up at the back of box 1, the back of cooling box 2 extends to the inboard of taking out groove 18, two air ducts 5 lead to the outside that the groove 17 extends to box 1 through two bars respectively, it conveniently takes cooling box 2 out air exhauster 12 from box 1 and demolishs to take out groove 18, air duct 5 can follow taking out and moving of cooling box 2 through the groove 17 is led to in the bar, the person of facilitating the use is dismantled cooling.
Further, the outside fixedly connected with insulating layer 19 of box 1, the homogeneous shaping in the left and right sides of cooling box 2 has sealing strip 20, and two sealing strips 20 are located the inboard that two bars led to the groove 17 respectively, because complete sets distribution equipment's use all is a plurality of cooperations and uses, can avoid external environment to cause the influence to the inside of box 1 through insulating layer 19, have guaranteed cooling system's heat dissipation cooling effect.
Further, the department fixed mounting that runs through of air duct 5 and baffle 4 has sealing washer 21, and heat-conducting plate 7 is made by the aluminum alloy, and fin 14 is made by copper, through the sealed kneck of air duct 5 and baffle 4 of sealing washer 21, prevents that the coolant liquid from mixing, leads to the coolant liquid level between two baffles 4 to change, and aluminum alloy and copper all possess good radiating effect, can play the heat conduction effect.
The type of the exhaust fan 6 can be FV-20VG2, the type of the exhaust fan 11 can be FV-15WJ1C, and the type of the exhaust fan 12 can be Kavin JD 315.
The working principle is as follows: the exhaust fans 12 on two sides of the box body 1 are electrified to work, air outside the box body 1 is pumped to the air guide pipe 5 for transmission, the air guide pipe 5 passes through the inside of the cooling box 2, the air guide pipe 5 is divided into a spiral part 51 and a straight pipe part 52, the spiral part 51 and the straight pipe part 52 are immersed below the cooling liquid level, and then heat exchange can be carried out when the air passes through, the spiral part 51 can increase the heat dissipation time and improve the cooling effect, the air in the straight pipe part 52 is further discharged from the cooling liquid to be further subjected to heat exchange with the cooling liquid, the heat dissipation and cooling effect of a heat dissipation system is improved, then the air is guided into the moisture absorption device 13 through the through pipe 8, moisture in the air is absorbed by the moisture absorption cotton 132 in the moisture absorption box 131 and the active carbon between the two partition nets 133, so that the moisture is prevented from entering the inside of the power distribution equipment to cause equipment corrosion and, and then cool down the temperature of the complete set of distribution equipment inside the box 1, then the air after the heat transfer is discharged through the fan 11 at the top of the box 1 again, the radiating effect is better, avoid the too high temperature of the complete set of distribution equipment and influence the operation of the equipment, prevent the circuit from burning, improve the service life of the complete set of distribution equipment, the radiating fin 14 can promote the heat conductivity of the heat-conducting plate 7, because expend with heat and contract with cold and keep away from, the hot air rises and the cold air descends, lead to the temperature stratification in the box 1, it is inhomogeneous and lead to the temperature too concentrated to produce the high temperature easily, utilize the radiating fin 14 to influence the top and cool down to it with the low temperature of bottom, the radiating capacity of the cooling system that makes is even reliable, avoid the heat to concentrate, and then avoid producing.
The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.
Claims (8)
1. The utility model provides a cooling system that high low voltage complete set distribution equipment used, includes box (1), its characterized in that: the bottom sliding connection of box (1) has cooling box (2), the inside of cooling box (2) is added with the coolant liquid, the interior roof fixedly connected with of cooling box (2) has two baffles (3) and two baffle (4), two baffle (4) are located the one side that two baffles (3) carried on the back mutually respectively, two all alternate air duct (5) rather than fixed connection on baffle (4), two one end that air duct (5) carried on the back mutually all runs through cooling box (2) and box (1) in proper order and extends to the outside of box (1), the top fixed mounting of cooling box (2) has extraction fan (6), the inner wall fixedly connected with heat-conducting plate (7) of box (1), the top fixedly connected with siphunculus (8) of extraction fan (6), the gas guide hole (9) that the equidistance was arranged is seted up to the inside of heat-conducting plate (7), two the equal fixedly connected with moisture absorption device (13) in bottom of heat-conducting plate (7), the top of siphunculus (8) respectively with two moisture absorption device (13) fixed connection, two evenly distributed's louvre (10) is all seted up to heat-conducting plate (7) relative one end, the one end and air guide hole (9) of louvre (10) are linked together, the top fixed mounting of box (1) has out fan (11), the equal fixed mounting in the left and right sides of box (1) has air exhauster (12), two the one end that air duct (5) kept away from mutually is respectively with two air exhauster (12) fixed connection.
2. The heat dissipation system for high-low voltage complete power distribution equipment according to claim 1, wherein: air duct (5) include spiral portion (51) and straight tube portion (52), spiral portion (51) are located two one side that baffle (4) carried on the back mutually, spiral portion (51) are close to the one end and the straight tube portion (52) integrated into one piece of baffle (4), the one end that spiral portion (51) were kept away from in straight tube portion (52) runs through baffle (4) and extends to between baffle (3) and baffle (4).
3. The heat dissipation system for high-low voltage complete power distribution equipment according to claim 1, wherein: the opposite sides of the two heat-conducting plates (7) are fixedly connected with radiating fins (14) which are arranged at equal intervals, and the radiating holes (10) are positioned between the two adjacent radiating fins (14).
4. The heat dissipation system for high-low voltage complete power distribution equipment according to claim 1, wherein: the front of cooling box (2) fixedly connected with three oiling pipe (15), two the equal fixedly connected with dispersion ball (16) of one end that air duct (5) are relative, set up evenly distributed's venthole on dispersion ball (16).
5. The heat dissipation system for high-low voltage complete power distribution equipment according to claim 1, wherein: the moisture absorption device (13) comprises a moisture absorption box (131), moisture absorption cotton (132) and two separation nets (133) are fixedly arranged inside the moisture absorption box (131), and activated carbon is filled between the two separation nets (133).
6. The heat dissipation system for high-low voltage complete power distribution equipment according to claim 1, wherein: the bar is led to groove (17) has all been seted up to the left and right sides of box (1), draw groove (18) that lead to groove (17) and be linked together rather than inside and bar are seted up at the back of box (1), the back of cooling box (2) extends to the inboard of drawing groove (18), two air duct (5) lead to the outside that groove (17) extended to box (1) through two bars respectively.
7. The heat dissipation system for high-low voltage complete set of power distribution equipment as claimed in claim 6, wherein: the outside fixedly connected with insulating layer (19) of box (1), the equal integrated into one piece in the left and right sides of cooling box (2) has sealing strip (20), two sealing strip (20) are located the inboard of two bar logical grooves (17) respectively.
8. The heat dissipation system for high-low voltage complete power distribution equipment according to claim 3, wherein: the heat conducting plate is characterized in that a sealing ring (21) is fixedly mounted at a penetrating position of the air guide tube (5) and the baffle plate (4), the heat conducting plate (7) is made of aluminum alloy, and the radiating fins (14) are made of copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010535048.8A CN111525424A (en) | 2020-06-12 | 2020-06-12 | Heat radiation system for high-low voltage complete set of distribution equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010535048.8A CN111525424A (en) | 2020-06-12 | 2020-06-12 | Heat radiation system for high-low voltage complete set of distribution equipment |
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| CN111525424A true CN111525424A (en) | 2020-08-11 |
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| CN202010535048.8A Pending CN111525424A (en) | 2020-06-12 | 2020-06-12 | Heat radiation system for high-low voltage complete set of distribution equipment |
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| CN115802696A (en) * | 2022-08-23 | 2023-03-14 | 沭阳鸿行照明有限公司 | Low-noise power supply with waterproof function for landscape lamp |
| CN115802696B (en) * | 2022-08-23 | 2023-10-20 | 沭阳鸿行照明有限公司 | Low-noise power supply with waterproof function for landscape lamp |
| CN115199972A (en) * | 2022-09-19 | 2022-10-18 | 南京万辉灯具灯饰有限公司 | LED lighting lamp |
| CN115199972B (en) * | 2022-09-19 | 2023-01-06 | 东莞市天华光电科技有限公司 | LED lighting lamp |
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Application publication date: 20200811 |
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