CN117747376A - Fuse device for direct current side of photovoltaic power station - Google Patents
Fuse device for direct current side of photovoltaic power station Download PDFInfo
- Publication number
- CN117747376A CN117747376A CN202311628349.5A CN202311628349A CN117747376A CN 117747376 A CN117747376 A CN 117747376A CN 202311628349 A CN202311628349 A CN 202311628349A CN 117747376 A CN117747376 A CN 117747376A
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- Prior art keywords
- photovoltaic power
- direct current
- fuse
- current side
- fuse device
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000004140 cleaning Methods 0.000 claims abstract description 32
- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 239000000428 dust Substances 0.000 claims abstract description 17
- 229920000742 Cotton Polymers 0.000 claims abstract description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 25
- 239000004020 conductor Substances 0.000 claims description 25
- 239000002184 metal Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 4
- 238000001179 sorption measurement Methods 0.000 abstract description 7
- 210000001503 joint Anatomy 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000005389 magnetism Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000013024 troubleshooting Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Landscapes
- Fuses (AREA)
Abstract
The invention relates to the technical field of direct-current side fuses of photovoltaic power stations, in particular to a fuse device for the direct-current side of a photovoltaic power station, which comprises a box body and a cleaning mechanism, wherein the cleaning mechanism comprises a cleaning plate, the upper surface of the cleaning plate is fixedly provided with a vertical rod, the surface of the vertical rod is provided with two groups of arc grooves in a surrounding way, and the arc grooves are in sliding fit with protrusions; the collecting mechanism comprises a collecting hopper, a notch is formed in the outer surface of the collecting hopper, deformation strips are arranged in the notch, a plurality of groups of butt joint interfaces are formed in the surfaces of the deformation strips, adsorption cotton is arranged above the deformation strips, and the adsorption cotton is electrically connected with the butt joint interfaces through conducting rods. According to the invention, through the cooperation of the parts, the dust in the fuse can be cleaned and adsorbed in the working and disconnecting processes of the fuse, and meanwhile, the fuse can be ensured to be automatically disconnected when the instantaneous current is overlarge, so that the fuse is protected.
Description
Technical Field
The invention relates to the technical field of direct-current side fuses of photovoltaic power stations, in particular to a fuse device for the direct-current side of a photovoltaic power station.
Background
The direct current side of a photovoltaic power plant is equipped with a direct current combiner box, which is usually provided with a plurality of branches, each branch being provided with a fuse in order to prevent the branch from flowing through. In the on-site operation and maintenance process, the fuse is one of the common faults of the combiner box, and once the fuse is blown, the fuse needs to be replaced integrally, so that the generated energy of the photovoltaic power station is greatly influenced. The fusing condition of the fuse is mainly divided into two types, one is that the environment temperature is high, and in addition, a large current continuously flows in a branch circuit, so that the resistance wire continuously heats, the temperature continuously rises, the melting point of the resistance wire is reached, and finally the fuse is blown; one is that the instantaneous current in the circuit is too great, the resistance wire reaches the melting point in a very short time, and the fuse blows. The novel fuse needs to be replaced after the circuit breaking, because the quantity of the centralized photovoltaic power station combiner boxes is more, troubleshooting is very inconvenient for operation and maintenance personnel, meanwhile, because of the reasons of working environment, a large amount of dust is accumulated in the fuse, and the electric elements in the fuse are overheated and damaged, so that the fuse needs to be replaced frequently, the generated energy is influenced, and the operation and maintenance cost is increased.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides the fuse device for the direct current side of the photovoltaic power station, which can effectively solve the problems that the quantity of the centralized photovoltaic power station combiner boxes is more, the troubleshooting of operation and maintenance personnel is very inconvenient, and meanwhile, the fuses are frequently replaced, so that the generated energy is influenced, and the operation and maintenance cost is increased.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
the invention provides a fuse device for a direct current side of a photovoltaic power station, which comprises a box body, a first wiring terminal and a second wiring terminal, wherein the first wiring terminal and the second wiring terminal are internally provided with inscribed conductive sheets and resistance wires, and the fuse device further comprises: the cleaning mechanism is used for cleaning dust in the fuse, and comprises a cleaning plate, wherein a vertical rod is fixedly arranged on the upper surface of the cleaning plate, two groups of arc grooves are formed in the surface of the vertical rod in a surrounding mode, and protrusions are in sliding fit with the arc grooves; the collecting mechanism is used for collecting and cleaning dust and comprises a collecting hopper, a notch is formed in the outer surface of the collecting hopper, deformation strips are arranged in the notch, a plurality of groups of butt joint interfaces are formed in the surfaces of the deformation strips, adsorption cotton is arranged above the deformation strips, and the adsorption cotton is electrically connected with the butt joint interfaces through conducting rods.
Further, the overload protection mechanism for overload protection of the fuse inside the direct current combiner box is further included, the overload protection mechanism comprises an iron core and a voltage-stabilizing diode, a coil is wound on the outer surface of the iron core, an armature is arranged above the iron core, one side of the armature is fixedly connected with an external conductor, and a conductive block is arranged below one end of the external conductor.
Further, a metal rod is fixedly arranged on the surface of the armature, and an arc-shaped contact piece is attached to the surface of the metal rod.
Further, the armature is integrally connected with the external conductor, the external conductor is electrically connected with the first wiring terminal through a connecting spring, and the connecting spring is made of conductive metal.
Further, the conductive block is electrically connected with one end of the resistance wire, the conductive block is in contact fit with the external conductor, and the contact surface is coated with conductive paste.
Further, the middle part of the external conductor is fixed on the inner wall of the box body through the limiting shaft, and the external conductor can rotate around the limiting shaft.
Further, the zener diode is connected with the coil in series, and the cathode of the zener diode is connected with the other end of the resistance wire.
Further, the protruding round hole inner wall that the fixed mounting connecting plate surface was offered, and connecting plate and armature fixed connection, the connecting plate is through reset spring elastic connection has the fixed plate, and fixed plate fixed mounting is at the inner wall of box body to the fixed plate rotates with the montant and is connected.
Further, the bottom surface of the notch is rotationally connected with balls at equal intervals, and the balls are in contact with the bottom surface of the deformation strip.
Further, one end of the deformation strip is movably connected with two groups of guide wheels, and the guide wheels are in sliding fit with the inner wall of the notch.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
1. according to the invention, the cleaning mechanism and the collecting mechanism are arranged, so that when the iron core loses magnetism due to the disappearance of current in the coil loop after the fuse is disconnected, the armature is stretched and reset under the action of the connecting spring, and meanwhile, the cleaning plate is reset and cleans the upper end of the iron core through the cooperation between the protrusion and the arc-shaped groove, the cleaned dust is adsorbed, meanwhile, the adsorption cotton is provided with static electricity through the metal rod and the arc-shaped contact piece, the dust in the fuse is adsorbed, and the dust in the fuse is reduced.
2. According to the invention, by arranging the overload protection mechanism, when the instantaneous current passing through the fuse is overlarge, the armature is attracted to move downwards through the magnetization of the coil and drives the external conductor to rotate clockwise, so that the external conductor is separated from the conductive block, the purpose of protecting the circuit is realized, the scheme is simple in structure and low in use cost, the current flowing through the resistance wire can be reduced, and under the condition that the fuse is blown due to the rising of the ambient temperature, the fuse can be automatically disconnected when the overload current is encountered, and the protection of the circuit is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a detailed schematic diagram of the overall structure of the present invention;
FIG. 3 is a schematic view of a cleaning mechanism according to the present invention;
FIG. 4 is an exploded view of the cleaning mechanism of the present invention;
FIG. 5 is an enlarged schematic view of the structure A in FIG. 2 according to the present invention;
FIG. 6 is a schematic view of the structure of the collecting mechanism of the present invention;
FIG. 7 is a schematic cross-sectional view of a collection mechanism according to the present invention;
FIG. 8 is an enlarged schematic view of the structure of FIG. 7B according to the present invention;
fig. 9 is an exploded view of the collection mechanism of the present invention.
Reference numerals in the drawings represent respectively: 1. a case body; 2. a first terminal; 21. a second terminal; 3. a resistance wire; 4. overload protection mechanism; 41. an iron core; 42. a coil; 43. an armature; 431. a metal rod; 432. arc-shaped contact pieces; 44. a connecting spring; 45. externally connected with a conductive body; 46. a conductive block; 47. a zener diode; 5. a cleaning mechanism; 51. a cleaning plate; 52. a vertical rod; 53. an arc-shaped groove; 54. a protrusion; 55. a connecting plate; 56. a fixing plate; 6. a collection mechanism; 61. a collection bucket; 62. a notch; 621. a ball; 63. a deformation strip; 631. a guide wheel; 632. an interface; 64. adsorbing cotton; 641. conductive rods.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of 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 will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention is further described below with reference to examples.
Examples: a fuse device for the direct current side of a photovoltaic power station, referring to fig. 1-9, comprises a box body 1, a first wiring terminal 2 and a second wiring terminal 21, wherein the first wiring terminal 2 and the second wiring terminal 21 are internally provided with inscribed conductive sheets so as to facilitate the transmission of electric energy; and a resistance wire 3, one end of the resistance wire 3 is fixedly connected with the conductive block 46, and the other end thereof is connected with the second terminal 21.
The overload protection mechanism 4 is used for overload protection of the fuse inside the direct current combiner box, so that normal use of the equipment is ensured; the overload protection mechanism 4 comprises an iron core 41 and a zener diode 47, and by arranging the iron core 41 and the zener diode 47, when the zener diode 47 is broken down, the iron core 41 can generate magnetism under the action of the coil 42 to attract the armature 43 so as to drive the external conductor 45 to be separated from the conductive block 46, thereby achieving the purpose of breaking the circuit breaker; it should be noted that the zener diode 47 is a prior art, and is not described herein in detail;
the coil 42 is wound on the outer surface of the iron core 41, and when the zener diode 47 breaks down, the current passing through the inside of the coil 42 magnetizes the iron core 41, so as to attract the armature 43; an armature 43 is arranged above the iron core 41, and the armature 43 is arranged, so that the conductive effect can be achieved; the surface of the armature 43 is fixedly provided with a metal rod 431, the surface of the metal rod 431 is attached with an arc-shaped contact piece 432, and the arc-shaped contact piece 432 is made of a metal conductive material and is electrically connected with a butt joint 632 formed on the surface of the deformation strip 63; by arranging the metal rod 431 and the arc-shaped contact piece 432, the effects of conducting electricity and transmitting electric energy can be achieved; the armature 43 is integrally connected with the external conductor 45, and the external conductor 45 is electrically connected with the first terminal 2 through the connection spring 44, and the connection spring 44 is composed of a conductive metal.
The external conductor 45 is fixedly connected to one side of the armature 43, the middle part of the external conductor 45 is fixed to the inner wall of the box body 1 through a limiting shaft, the external conductor 45 can rotate around the limiting shaft, and the effect of transmitting electric energy can be achieved through the arrangement of the external conductor 45, and rotation of the external conductor 45 can be controlled on the one hand, so that the purpose of breaking a circuit breaker is achieved; a conductive block 46 is arranged below one end of the external conductive body 45, the conductive block 46 is electrically connected with one end of the resistance wire 3, the conductive block 46 is in contact fit with the external conductive body 45, and conductive paste is coated on the contact surface, and the conductive block 46 and the conductive paste are arranged, so that better transmission of electric energy is facilitated; the zener diode 47 is connected in series with the coil 42, and the negative electrode of the zener diode 47 is connected to the other end of the resistance wire 3.
The cleaning mechanism 5 is provided for cleaning the upper end of the iron core 41, so that the problem that the end of the iron core 41 is accumulated by substances such as dust in the air after being magnetized, and the armature 43 cannot be effectively attracted to move downwards is solved; the cleaning mechanism 5 comprises a cleaning plate 51 arranged between the armature 43 and the iron core 41, and the cleaning plate 51 is arranged to clean the upper end of the iron core 41, so that dust accumulation is reduced;
wherein, the upper surface of the cleaning plate 51 is fixedly provided with a vertical rod 52, and the vertical rod 52 is rotationally connected with a strip-shaped plate arranged on the inner wall of the box body 1, and the vertical rod 52 is arranged so as to play a role in guiding and limiting; two groups of arc grooves 53 are formed around the surface of the vertical rod 52, and the arc grooves 53 are arranged, so that the arc grooves can be matched with other parts under the action of the shape of the arc grooves, and the purpose of driving the vertical rod 52 to rotate is achieved;
wherein, the arc-shaped groove 53 is slidably matched with a protrusion 54, the protrusion 54 is fixedly arranged on the inner wall of a round hole formed in the surface of the connecting plate 55, the connecting plate 55 is fixedly connected with the armature 43, and the protrusion 54 is arranged on the inner wall of the round hole formed in the surface of the connecting plate 55 fixedly connected with the armature 43, so that when the armature 43 moves upwards, the rotated cleaning plate 51 starts to reset through the matching between the protrusion 54 and the arc-shaped groove 53, and the purpose of cleaning the upper end of the iron core 41 is realized;
it should be noted that, when the zener diode 47 breaks down, the iron core 41 will be magnetized by the current in the coil 42, so as to start to attract the armature 43 to move downward, and in the process of moving the armature 43 downward, the connection plate 55 will be driven to move downward synchronously, so that the protrusion 54 will slide in the arc-shaped slot 53, so that the vertical rod 52 starts to drive the cleaning plate 51 to rotate and keep away from the upper end of the iron core 41, so that the iron core 41 and the armature 43 are attracted, and the circuit breaker is opened;
when the fuse is disconnected, the current in the coil 42 disappears, so that the magnetism of the iron core 41 disappears, the armature 43 starts to reset under the reaction force generated by the connecting spring 44, and then in the resetting process, the cleaning plate 51 is driven to reset through the vertical rod 52 and the upper end of the iron core 41 is cleaned, so that dust accumulation is reduced.
Wherein, the connecting plate 55 is connected with the fixed plate 56 through reset spring elasticity, and fixed plate 56 fixed mounting is at the inner wall of box body 1 to fixed plate 56 rotates with montant 52 to be connected, through setting up fixed plate 56, and then can fix and spacing the position of cleaning plate 51.
With reference to fig. 6-9, the collecting mechanism 6 is used for collecting and cleaning dust so as to reduce the dust in the fuse and protect parts in the fuse; the collecting mechanism 6 includes a collecting hopper 61 for collecting the cleaned dust and the dust adsorbed by static electricity for the subsequent treatment;
wherein, the outer surface of the collecting hopper 61 is provided with a notch 62, and the notch 62 is of an annular structure; by providing the recess 62 so that the deformation bar 63 can be fitted into the inside thereof; the bottom surface of the notch 62 is rotationally connected with the balls 621 at equal intervals, and the balls 621 are contacted with the bottom surface of the deformation strip 63, so that the deformation strip 63 can be quickly installed during installation by arranging the balls 621;
wherein, the recess 62 is internally provided with a deformation strip 63, and the deformation strip 63 is made of insulating material and can deform so as to adapt to the annular recess 62; two groups of guide wheels 631 are movably connected to one end of the deformation strip 63, the guide wheels 631 are in sliding fit with the inner wall of the notch 62, and the guide wheels 631 are arranged to further contact with the inner wall of the notch 62 and rotate so as to ensure that the deformation strip 63 can be deformed better during installation; the surface of the deformation strip 63 is provided with a plurality of groups of opposite interfaces 632, and the opposite interfaces 632 are used for transmitting electric energy transmitted by the arc-shaped contact pieces 432; an adsorption cotton 64 is arranged above the deformation strip 63, and the adsorption cotton 64 is electrically connected with the butt joint port 632 through a conductive rod 641; through setting up absorption cotton 64 and conducting rod 641, and then can make the electric energy of docking port 632 pass through conducting rod 641 and transmit to absorption cotton 64 for absorption cotton 64 drives static, produces absorptive effect to the dust, so that follow-up through the pulling set up in fuse one side and with deformation strip 63 fixed connection's handle, make absorption cotton 64 pulled out and replace can.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; these modifications or substitutions do not depart from the essence of the corresponding technical solutions from the protection scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a fuse device for photovoltaic power plant direct current side, includes box body (1), first wiring end (2) and second wiring end (21), and first wiring end (2) and second wiring end (21) are inside all to be provided with inscribed conducting strip to and resistance wire (3), its characterized in that still includes:
the cleaning mechanism (5) is used for cleaning dust in the fuse, the cleaning mechanism (5) comprises a cleaning plate (51), a vertical rod (52) is fixedly arranged on the upper surface of the cleaning plate (51), two groups of arc-shaped grooves (53) are formed in the surface of the vertical rod (52) in a surrounding mode, and the arc-shaped grooves (53) are in sliding fit with protrusions (54);
collect mechanism (6) for collect the clearance to the dust, collect mechanism (6) including collecting fill (61), and collect the surface of fighting (61) and seted up notch (62), the inside of notch (62) is equipped with deformation strip (63), and the multiunit is to interface (632) have been seted up on the surface of deformation strip (63), the top of deformation strip (63) is provided with adsorbs cotton (64), and adsorbs cotton (64) and be connected with interface (632) electricity through conducting rod (641).
2. The fuse device for the direct current side of the photovoltaic power station according to claim 1, further comprising an overload protection mechanism (4) for overload protection of the fuse inside the direct current combiner box, wherein the overload protection mechanism (4) comprises an iron core (41) and a zener diode (47), a coil (42) is wound on the outer surface of the iron core (41), an armature (43) is arranged above the iron core (41), an external conductor (45) is fixedly connected to one side of the armature (43), and a conductive block (46) is arranged below one end of the external conductor (45).
3. A fuse device for the direct current side of a photovoltaic power plant according to claim 2, characterized in that the surface of the armature (43) is fixedly provided with a metal rod (431), and the surface of the metal rod (431) is attached with an arc-shaped contact piece (432).
4. A fuse device for the direct current side of a photovoltaic power plant according to claim 3, characterized in that the armature (43) is integrally connected with an external electrical conductor (45), and that the external electrical conductor (45) is electrically connected with the first terminal (2) by means of a connection spring (44), the connection spring (44) being composed of an electrically conductive metal.
5. A fuse device for the direct current side of a photovoltaic power plant according to claim 4, characterized in that the conductive block (46) is electrically connected to one end of the resistance wire (3), the conductive block (46) is in contact fit with an external conductor (45), and the contact surface is coated with conductive paste.
6. The fuse device for the direct current side of a photovoltaic power station according to claim 5, wherein the middle part of the external conductor (45) is fixed on the inner wall of the box body (1) through a limiting shaft, and the external conductor (45) can rotate around the limiting shaft.
7. A fuse device for the direct current side of a photovoltaic power plant as claimed in claim 3, characterized in that the zener diode (47) is connected in series with the coil (42) and the negative pole of the zener diode (47) is connected to the other end of the resistive wire (3).
8. The fuse device for the direct current side of the photovoltaic power station according to claim 1, wherein the protrusion (54) is fixedly installed on the inner wall of a round hole formed in the surface of the connecting plate (55), the connecting plate (55) is fixedly connected with the armature (43), the connecting plate (55) is elastically connected with the fixing plate (56) through the reset spring, the fixing plate (56) is fixedly installed on the inner wall of the box body (1), and the fixing plate (56) is rotatably connected with the vertical rod (52).
9. A fuse device for the direct current side of a photovoltaic power plant according to claim 1, characterized in that balls (621) are connected to the bottom surface of the recess (62) in equidistant rotation, and in that the balls (621) are in contact with the bottom surface of the deformation bar (63).
10. A fuse device for the direct current side of a photovoltaic power plant according to claim 9, characterized in that one end of the deformation bar (63) is movably connected with two sets of guide wheels (631), and the guide wheels (631) are in sliding fit with the inner walls of the recesses (62).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311628349.5A CN117747376A (en) | 2023-11-29 | 2023-11-29 | Fuse device for direct current side of photovoltaic power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311628349.5A CN117747376A (en) | 2023-11-29 | 2023-11-29 | Fuse device for direct current side of photovoltaic power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117747376A true CN117747376A (en) | 2024-03-22 |
Family
ID=90276648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311628349.5A Pending CN117747376A (en) | 2023-11-29 | 2023-11-29 | Fuse device for direct current side of photovoltaic power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117747376A (en) |
-
2023
- 2023-11-29 CN CN202311628349.5A patent/CN117747376A/en active Pending
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