CN109780470A - It is a kind of for the indoor lighting device with dedusting function easy to repair - Google Patents
It is a kind of for the indoor lighting device with dedusting function easy to repair Download PDFInfo
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- CN109780470A CN109780470A CN201910054468.1A CN201910054468A CN109780470A CN 109780470 A CN109780470 A CN 109780470A CN 201910054468 A CN201910054468 A CN 201910054468A CN 109780470 A CN109780470 A CN 109780470A
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Abstract
The present invention relates to a kind of for the indoor lighting device with dedusting function easy to repair, including bottom plate, fluorescent tube, two connectors and two link blocks, the floor level setting, the fluorescent tube is horizontally set on the lower section of bottom plate, two connectors are separately positioned on the both ends of fluorescent tube, the link block and connector correspond, the link block is fixed on the top of connector, the top of the link block and the bottom of bottom plate against, dedusting mechanism and two elevating mechanisms there are two being set on the fluorescent tube, two elevating mechanisms are separately positioned on the both ends of fluorescent tube, the dedusting mechanism and elevating mechanism correspond, this realizes dust on cleaning fluorescent tube by dedusting mechanism for the indoor lighting device with dedusting function easy to repair, moreover, the convenience of maintenance is also improved by elevating mechanism.
Description
Technical field
It is the present invention relates to smart city field, in particular to a kind of for indoor easy to repair with dedusting function
Lighting device.
Background technique
Smart city is exactly to sense, analyze, integrating each of city operations core system with information and communication technology (ICT) means
Item key message, to be made to the various demands including the people's livelihood, environmental protection, public safety, urban service, industry and commerce activity
Intelligent response, and LED daylight lamp is to belong to one kind of lighting apparatus in smart city, LED daylight lamp is commonly called as straight lamp, is tradition
The substitute of fluorescent tube is embodied in two aspects of energy conservation and environmental protection, and size mounting means is identical with conventional fluorescent, but shines
Principle be using LED semiconductor chip carry out it is luminous.
Existing LED daylight lamp is mostly installed aloft, when LED daylight lamp, which breaks down, to need repairing, it usually needs
Maintenance personal rises to the height of LED daylight lamp by tool, belongs to high altitude operation, has certain risk, moreover,
LED daylight lamp after long-term use, will form dust accretions on fluorescent tube, dust can not only reduce heat dissipation effect, can also stop LED
The light that fluorescent tube issues, influences illuminating effect.
Summary of the invention
The technical problem to be solved by the present invention is for overcome the deficiencies in the prior art, provide it is a kind of for it is indoor just
In the lighting device with dedusting function of maintenance.
The technical solution adopted by the present invention to solve the technical problems is: a kind of to remove for indoor easy to repair having
The lighting device of dirt function, including bottom plate, fluorescent tube, two connectors and two link blocks, the floor level setting, the lamp
Pipe is horizontally set on the lower section of bottom plate, and two connectors are separately positioned on the both ends of fluorescent tube, and the link block and connector are one by one
Corresponding, the link block is fixed on the top of connector, and the top of the link block and the bottom of bottom plate are against on the fluorescent tube
If there are two dedusting mechanism and two elevating mechanisms, two elevating mechanisms are separately positioned on the both ends of fluorescent tube, the dedusting mechanism
It is corresponded with elevating mechanism;
The dedusting mechanism includes cleaning assemblies and accessory part, and the cleaning assemblies includes cleaning motor, sliding block, company
Bar, wiper ring, support base and screw rod, the cleaning motor are fixed on the side of the close fluorescent tube of link block, and the screw rod is horizontal
One end of setting, the cleaning motor and screw rod is sequentially connected, and the support base is set in the other end of screw rod, the support base
It is fixed on the bottom of bottom plate, the sliding block is set on screw rod, and being equipped with the junction of screw rod for the sliding block is matched with screw rod
Screw thread, the axis of the wiper ring is overlapped with the axis of fluorescent tube, and the annular distance of the wiper ring is matched with fluorescent tube, and the fluorescent tube is set
It sets in the annular distance of wiper ring, the inner wall of the annular distance of the wiper ring is equipped with cleaning brush, and the connecting rod is vertically provided at sliding block
Between wiper ring, the sliding block is fixedly connected by connecting rod with wiper ring;
The elevating mechanism includes lifting assembly and locking assembly, and the lifting assembly includes lifting motor, roller, connection
The side of the separate fluorescent tube of link block is arranged in line and fixed block, the lifting motor, and the lifting motor is fixed on bottom plate
Bottom, the roller are horizontally set between lifting motor and link block, and the lifting motor is connect with drum drive, described solid
Determine the bottom that the separate fluorescent tube side of link block is arranged in block, the lower section of roller is arranged in the fixed block, the connecting line
One end is fixed on the top of fixed block, and the other end of the connecting line is fixed on roller, and the connecting line is on roller.
Preferably, in order to improve dust removing effects, the accessory part includes rack gear, gear, connection bearing and flabellum, institute
It states rack gear to be horizontally set between link block and support base, the both ends of the rack gear are fixed with link block and support base respectively to be connected
It connects, the connection bearing is mounted on connecting rod, and the gear is mounted on connection bearing, the wheel and rack engagement, described
Flabellum is arranged between gear and wiper ring, and the flabellum is mounted on connection bearing.
Preferably, in order to improve the stability of fluorescent tube, the locking assembly includes electromagnet, fixed link, limited block, shifting
The side of the separate fluorescent tube of link block is arranged in motion block, spring and two check lock levers, the electromagnet, and the electromagnet is fixed on
The bottom of bottom plate, the fixed link are horizontally set between electromagnet and link block, and one end of the fixed link and electromagnet are solid
Fixed connection, the limited block are fixed on the other end of fixed link, and the movable block is set in fixed link, and the spring setting exists
Between movable block and electromagnet, the electromagnet is connect by spring with movable block, and the spring is set in fixed link, and two
Check lock lever is horizontally set on above and below limited block respectively, and the check lock lever is arranged between movable block and link block, institute
It states and is set on link block there are two connecting hole, the connecting hole and check lock lever correspond, and the connecting hole is matched with check lock lever, institute
The one end for stating check lock lever is fixed on movable block, and the other end of the check lock lever is arranged in connecting hole, and the movable block is iron
Material.
Preferably, cooperating for the ease of check lock lever and connecting hole, one end of the separate movable block of the check lock lever is equipped with
Chamfering.
Preferably, in order to improve the accuracy of link block shift position, the top of the link block is equipped with control block, institute
The shape for stating control block is rotary table, and the axis of the truncated conical shape of the control block is vertically arranged, the truncated conical shape of the control block
Bottom where face be fixed on the top of link block, the bottom of the bottom plate is equipped with recess, the recess and control Block- matching,
The control block is arranged in recess.
Preferably, being coated with lubricating oil on the screw rod to reduce the frictional force between screw rod and sliding block.
Preferably, the top of the sliding block is bonded with the bottom of bottom plate in order to avoid sliding block rotates on screw rod.
Preferably, in order to improve the intensity of connecting line, the making material of the connecting line is wirerope.
Preferably, in order to improve the driving force of lifting motor, the lifting motor is servo motor.
Preferably, in order to improve illuminating effect, the bottom of the bottom plate is equipped with reflector.
The invention has the advantages that this is used for the indoor lighting device with dedusting function easy to repair by removing
Dirt mechanism realizes the function of dust on cleaning fluorescent tube, and compared with existing dedusting mechanism, which, which is also equipped with, blows
The function of dust is fallen, cost performance is higher, moreover, the convenience of maintenance is also improved by elevating mechanism, with existing liter
Descending mechanism is compared, and the elevating mechanism structure is simple, and practicability is higher.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the structural schematic diagram for the indoor lighting device with dedusting function easy to repair of the invention;
Fig. 2 is the portion the A enlarged drawing of Fig. 1;
Fig. 3 is the portion the B enlarged drawing of Fig. 2;
Fig. 4 is the portion the C enlarged drawing of Fig. 2;
In figure: 1. bottom plates, 2. fluorescent tubes, 3. connectors, 4. link blocks, 5. cleaning motors, 6. sliding blocks, 7. connecting rods, 8. cleanings
Ring, 9. support bases, 10. screw rods, 11. lifting motors, 12. rollers, 13. connecting lines, 14. fixed blocks, 15. rack gears, 16. gears,
17. bearing is connected, 18. flabellums, 19. electromagnet, 20. fixed links, 21. limited blocks, 22. movable blocks, 23. springs, 24. lockings
Bar, 25. control blocks.
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with
Illustration illustrates basic structure of the invention, therefore it only shows the composition relevant to the invention.
As shown in Figs. 1-2, a kind of for the indoor lighting device with dedusting function easy to repair, including bottom plate 1,
2, two connectors 3 of fluorescent tube and two link blocks 4, the bottom plate 1 is horizontally disposed, and the fluorescent tube 2 is horizontally set under bottom plate 1
Side, two connectors 3 are separately positioned on the both ends of fluorescent tube 2, and the link block 4 and connector 3 correspond, the link block 4
It is fixed on the top of connector 3, the bottom of the top of the link block 4 and bottom plate 1 is against setting that there are two remove on the fluorescent tube 2
Dirt mechanism and two elevating mechanisms, two elevating mechanisms are separately positioned on the both ends of fluorescent tube 2, the dedusting mechanism and elevating mechanism
It corresponds;
The dedusting mechanism includes cleaning assemblies and accessory part, and the cleaning assemblies includes cleaning motor 5, sliding block 6, connects
Bar 7, wiper ring 8, support base 9 and screw rod 10, the cleaning motor 5 is fixed on the side of the close fluorescent tube 2 of link block 4, described
Screw rod 10 is horizontally disposed, and one end of the cleaning motor 5 and screw rod 10 is sequentially connected, and the support base 9 is set in screw rod 10
The other end, the support base 9 are fixed on the bottom of bottom plate 1, and the sliding block 6 is set on screw rod 10, the sliding block 6 and screw rod
10 junction, which is equipped with, to be overlapped with the matched screw thread of screw rod 10, the axis of the wiper ring 8 with the axis of fluorescent tube 2, the cleaning
The annular distance of ring 8 is matched with fluorescent tube 2, and the fluorescent tube 2 is arranged in the annular distance of wiper ring 8, on the inner wall of the annular distance of the wiper ring 8
Equipped with cleaning brush, the connecting rod 7 is vertically provided between sliding block 6 and wiper ring 8, and the sliding block 6 passes through connecting rod 7 and wiper ring 8
It is fixedly connected;
The elevating mechanism includes lifting assembly and locking assembly, the lifting assembly include lifting motor 11, roller 12,
The side of the separate fluorescent tube 2 of link block 4, the lifting motor is arranged in connecting line 13 and fixed block 14, the lifting motor 11
11 are fixed on the bottom of bottom plate 1, and the roller 12 is horizontally set between lifting motor 11 and link block 4, the lifting motor
11 are sequentially connected with roller 12, and the bottom of 2 side of separate fluorescent tube of link block 4, the fixed block is arranged in the fixed block 14
14 are arranged in the lower section of roller 12, and one end of the connecting line 13 is fixed on the top of fixed block 14, the connecting line 13 it is another
One end is fixed on roller 12, and the connecting line 13 is on roller 12.
It is connected by connector 3 with power supply unit, lights fluorescent tube 2, realize the effect of illumination, by cleaning motor 5
Operation, rotates screw rod 10 under the supporting role of support base 9, to make sliding block 6 that connecting rod 7 be driven to move on screw rod 10, leads to
The movement for crossing connecting rod 7 moves wiper ring 8 along the axis direction of fluorescent tube 2, so that the cleaning brush on wiper ring 8 removes fluorescent tube 2
On dust, realize the function of dedusting, when fluorescent tube 2 breaks down, run by lifting motor 11, make roller 12 rotate,
To make connecting line 13 unclamp, under gravity, make connector 3 that fluorescent tube 2 be driven to decline, personnel's maintenance easy to repair is kept away
Exempt from altitude effect, improves convenience.
As shown in figure 3, the accessory part includes rack gear 15, gear 16, connection bearing 17 and flabellum 18, the rack gear 15
It is horizontally set between link block 4 and support base 9, the both ends of the rack gear 15 are fixed with link block 4 and support base 9 respectively to be connected
It connects, the connection bearing 17 is mounted on connecting rod 7, and the gear 16 is mounted on connection bearing 17, the gear 16 and rack gear
15 engagements, the flabellum 18 are arranged between gear 16 and wiper ring 8, and the flabellum 18 is mounted on connection bearing 17, pass through
The movement of connecting rod 7 moves gear 16 on rack gear 15, because rack gear 15 remains static, so that gear 16 be made to drive connecting shaft
17 rotations are held, the rotation by connecting bearing 17 rotates flabellum 18, so that the dust under cleaning wiper ring 8 passes through flabellum 18
The wind-force of generation blows off dust, improves the effect for removing dust.
As shown in figure 4, the locking assembly includes electromagnet 19, fixed link 20, limited block 21, movable block 22, spring 23
With two check lock levers 24, the side of the separate fluorescent tube 2 of link block 4 is arranged in the electromagnet 19, and the electromagnet 19 is fixed on
The bottom of bottom plate 1, the fixed link 20 are horizontally set between electromagnet 19 and link block 4, one end of the fixed link 20 with
Electromagnet 19 is fixedly connected, and the limited block 21 is fixed on the other end of fixed link 20, and the movable block 22 is set in fixed link
On 20, the spring 23 is arranged between movable block 22 and electromagnet 19, and the electromagnet 19 passes through spring 23 and movable block 22
Connection, the spring 23 are set in fixed link 20, and two check lock levers 24 are horizontally set on the top of limited block 21 under respectively
Side, the check lock lever 24 are arranged between movable block 22 and link block 4, set that there are two connecting hole, the companies on the link block 4
It connects hole and check lock lever 24 corresponds, the connecting hole is matched with check lock lever 24, and one end of the check lock lever 24 is fixed on movement
On block 22, the other end of the check lock lever 24 is arranged in connecting hole, and the movable block 22 is ferrous material, when fluorescent tube 2 needs
It when decline, is powered by electromagnet 19, makes to generate the active force to attract each other between electromagnet 19 and the movable block of irony 22, from
And movable block 22 is made to drive check lock lever 24 mobile to close 19 direction of electromagnet, it drives spring 23 to compress, makes check lock lever 24 and connect
The separation of block 4 is connect, is declined convenient for link block 4, after maintenance, which finishes link block 4, to be resetted, electromagnet 19 is powered off, and makes movable block 22 in bullet
It is resetted under the elastic reaction of spring 23, so that check lock lever 24 be made to be moved in connecting hole, realizes the function of locking link block 4.
Preferably, cooperating for the ease of check lock lever 24 and connecting hole, the one of the separate movable block 22 of the check lock lever 24
End is equipped with chamfering, can be moved in connecting hole in order to check lock lever 24 by chamfering, improves the mobile fluency of check lock lever 24.
Preferably, in order to improve the accuracy of 4 shift position of link block, the top of the link block 4 is equipped with control block
25, the shape of the control block 25 is rotary table, and the axis of the truncated conical shape of the control block 25 is vertically arranged, the control block 25
Truncated conical shape bottom where face be fixed on the top of link block 4, the bottom of the bottom plate 1 is equipped with recess, the recess
It is matched with control block 25, the control block 25 is arranged in recess, can be in order to control block by the control block 25 of truncated conical shape
25 and mating recesses, so that link block 4 is reset to original position, improves accuracy when link block 4 resets.
Preferably, being coated with lubricating oil on the screw rod 10 to reduce the frictional force between screw rod 10 and sliding block 6, lead to
Crossing lubricating oil can reduce frictional force between screw rod 10 and sliding block 6, improve the mobile fluency of sliding block 6.
Preferably, the top of the sliding block 6 and the bottom of bottom plate 1 are pasted in order to avoid sliding block 6 rotates on screw rod 10
It closes, is bonded, can be rotated on screw rod 10 to avoid sliding block 6 with bottom plate 1 by sliding block 6, reduce the hanging down to fluorescent tube 2 of wiper ring 8
Directly in the active force of 2 axis direction of fluorescent tube.
Preferably, in order to improve the intensity of connecting line 13, the making material of the connecting line 13 is wirerope, wirerope
Intensity is not high, easily broken, improves the intensity of connecting line 13.
Preferably, in order to improve the driving force of lifting motor 11, the lifting motor 11 is servo motor.
Preferably, in order to improve illuminating effect, the bottom of the bottom plate 1 is equipped with reflector, can be rolled over by reflector
The light that shot-light pipe 2 generates upwards, improves illuminating effect.
This is used for the indoor lighting device with dedusting function easy to repair, passes through shifting of the wiper ring 8 on fluorescent tube 2
It is dynamic to realize the effect for removing dust on fluorescent tube 2, the ash flushed out on fluorescent tube 2 is blown off by the wind-force that the rotation of flabellum 18 generates
Dirt improves cleaning effect, so that connecting line 13 is unclamped or is tensed by the rotation of roller 12, to control the lifting of fluorescent tube 2, passes through
The decline of fluorescent tube 2 can be repaired with personnel easy to repair, avoided altitude effect, improved the convenience of maintenance.
Compared with prior art, this is used for the indoor lighting device with dedusting function easy to repair and passes through dust removal machine
Structure realizes the function of dust on cleaning fluorescent tube 2, and compared with existing dedusting mechanism, which, which is also equipped with, blows off ash
The function of dirt, cost performance is higher, moreover, the convenience of maintenance is also improved by elevating mechanism, with existing elevator
Structure is compared, and the elevating mechanism structure is simple, and practicability is higher.
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (10)
1. a kind of for the indoor lighting device with dedusting function easy to repair, including bottom plate (1), fluorescent tube (2), two
Connector (3) and two link blocks (4), the bottom plate (1) is horizontally disposed, and the fluorescent tube (2) is horizontally set under bottom plate (1)
Side, two connectors (3) are separately positioned on the both ends of fluorescent tube (2), and the link block (4) and connector (3) correspond, described
Link block (4) is fixed on the top of connector (3), and the top of the link block (4) and the bottom of bottom plate (1) are against feature
It is, is set on the fluorescent tube (2) there are two dedusting mechanism and two elevating mechanisms, two elevating mechanisms are separately positioned on fluorescent tube
(2) both ends, the dedusting mechanism and elevating mechanism correspond;
The dedusting mechanism includes cleaning assemblies and accessory part, and the cleaning assemblies includes cleaning motor (5), sliding block (6), connects
Bar (7), wiper ring (8), support base (9) and screw rod (10), cleaning motor (5) are fixed on the close fluorescent tube of link block (4)
(2) side, the screw rod (10) is horizontally disposed, and one end of cleaning motor (5) and screw rod (10) is sequentially connected, the branch
Support seat (9) is set in the other end of screw rod (10), and the support base (9) is fixed on the bottom of bottom plate (1), sliding block (6) set
Be located on screw rod (10), the sliding block (6) with the junction of screw rod (10) be equipped with screw rod (10) matched screw thread, it is described clear
The axis of clean ring (8) is overlapped with the axis of fluorescent tube (2), and the annular distance of the wiper ring (8) is matched with fluorescent tube (2), the fluorescent tube (2)
It is arranged in the annular distance of wiper ring (8), the inner wall of the annular distance of the wiper ring (8) is equipped with cleaning brush, and the connecting rod (7) is vertical
It is arranged between sliding block (6) and wiper ring (8), the sliding block (6) is fixedly connected by connecting rod (7) with wiper ring (8);
The elevating mechanism includes lifting assembly and locking assembly, the lifting assembly include lifting motor (11), roller (12),
Connecting line (13) and fixed block (14), the lifting motor (11) are arranged in the side of the separate fluorescent tube (2) of link block (4), institute
The bottom that lifting motor (11) is fixed on bottom plate (1) is stated, the roller (12) is horizontally set on lifting motor (11) and link block
(4) between, the lifting motor (11) and roller (12) are sequentially connected, and the fixed block (14) is arranged in the remote of link block (4)
Bottom from fluorescent tube (2) side, in the lower section of roller (12), one end of the connecting line (13) is solid for fixed block (14) setting
It is scheduled on the top of fixed block (14), the other end of the connecting line (13) is fixed on roller (12), connecting line (13) volume
It is wound on roller (12).
2. being used for the indoor lighting device with dedusting function easy to repair as described in claim 1, which is characterized in that
The accessory part includes rack gear (15), gear (16), connection bearing (17) and flabellum (18), and the rack gear (15) is horizontally disposed
Between link block (4) and support base (9), the both ends of the rack gear (15) are fixed with link block (4) and support base (9) respectively to be connected
It connects, the connection bearing (17) is mounted on connecting rod (7), and the gear (16) is mounted in connection bearing (17), the gear
(16) it is engaged with rack gear (15), the flabellum (18) is arranged between gear (16) and wiper ring (8), flabellum (18) installation
In connection bearing (17).
3. being used for the indoor lighting device with dedusting function easy to repair as described in claim 1, which is characterized in that
The locking assembly includes electromagnet (19), fixed link (20), limited block (21), movable block (22), spring (23) and two locks
Tight bar (24), the side of separate fluorescent tube (2) of electromagnet (19) setting in link block (4), the electromagnet (19) are fixed
In the bottom of bottom plate (1), the fixed link (20) is horizontally set between electromagnet (19) and link block (4), the fixed link
(20) one end is fixedly connected with electromagnet (19), and the limited block (21) is fixed on the other end of fixed link (20), the shifting
Motion block (22) is set on fixed link (20), and the spring (23) is arranged between movable block (22) and electromagnet (19), described
Electromagnet (19) is connect by spring (23) with movable block (22), and the spring (23) is set on fixed link (20), two locks
Tight bar (24) is horizontally set on respectively above and below limited block (21), check lock lever (24) setting in movable block (22) and
Between link block (4), set on the link block (4) there are two connecting hole, the connecting hole and check lock lever (24) correspond, institute
It states connecting hole to match with check lock lever (24), one end of the check lock lever (24) is fixed on movable block (22), the check lock lever
(24) the other end is arranged in connecting hole, and the movable block (22) is ferrous material.
4. being used for the indoor lighting device with dedusting function easy to repair as claimed in claim 3, which is characterized in that
One end of the separate movable block (22) of the check lock lever (24) is equipped with chamfering.
5. being used for the indoor lighting device with dedusting function easy to repair as described in claim 1, which is characterized in that
The top of the link block (4) is equipped with control block (25), and the shape of the control block (25) is rotary table, the control block (25)
The axis of truncated conical shape is vertically arranged, and the face where the bottom of the truncated conical shape of the control block (25) is fixed on link block (4)
Top, the bottom of the bottom plate (1) is equipped with recess, and the recess is matched with control block (25), and the control block (25) is arranged
In recess.
6. being used for the indoor lighting device with dedusting function easy to repair as described in claim 1, which is characterized in that
Lubricating oil is coated on the screw rod (10).
7. being used for the indoor lighting device with dedusting function easy to repair as described in claim 1, which is characterized in that
The top of the sliding block (6) is bonded with the bottom of bottom plate (1).
8. being used for the indoor lighting device with dedusting function easy to repair as described in claim 1, which is characterized in that
The making material of the connecting line (13) is wirerope.
9. being used for the indoor lighting device with dedusting function easy to repair as described in claim 1, which is characterized in that
The lifting motor (11) is servo motor.
10. being used for the indoor lighting device with dedusting function easy to repair as described in claim 1, feature exists
In the bottom of the bottom plate (1) is equipped with reflector.
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CN201910054468.1A CN109780470B (en) | 2019-01-21 | 2019-01-21 | Indoor lighting device with dust removal function and convenient to maintain |
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CN110985941A (en) * | 2019-12-24 | 2020-04-10 | 慈溪市莱殿光电有限公司 | Outdoor LED illuminating lamp |
CN111006156A (en) * | 2019-12-24 | 2020-04-14 | 慈溪市莱殿光电有限公司 | LED projecting lamp with dust removal function |
CN111202864A (en) * | 2020-01-15 | 2020-05-29 | 王慧芝 | Indoor air sterilization equipment with heat dissipation function |
CN111420295A (en) * | 2020-04-16 | 2020-07-17 | 王明 | Ultraviolet phototherapy equipment with high safety factor for vitiligo |
CN111420296A (en) * | 2020-04-21 | 2020-07-17 | 虞伟明 | A convenient type ultraviolet treatment equipment for dermatology |
CN114321822A (en) * | 2022-01-21 | 2022-04-12 | 广东省第五建筑工程有限公司 | Light guide lighting device for underground building and use method thereof |
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