CN110571675A - Multifunctional low-voltage distribution box - Google Patents
Multifunctional low-voltage distribution box Download PDFInfo
- Publication number
- CN110571675A CN110571675A CN201910856456.0A CN201910856456A CN110571675A CN 110571675 A CN110571675 A CN 110571675A CN 201910856456 A CN201910856456 A CN 201910856456A CN 110571675 A CN110571675 A CN 110571675A
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- CN
- China
- Prior art keywords
- distribution box
- groove
- heat dissipation
- main body
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/46—Boxes; Parts thereof or accessories therefor
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention discloses a multifunctional low-voltage distribution box, which comprises a box body component, a box cover component, a heat dissipation component and a filtering base, and is simple in structure and convenient to use, a sealing groove matched with a cover plate is formed in a distribution box main body, so that the sealing effect between the cover plate and the distribution box main body is better, air in the distribution box main body can be discharged from a heat dissipation opening through a heat dissipation fan in the heat dissipation component, the interior of the distribution box main body can be effectively ventilated and dissipated, the ventilation and heat dissipation efficiency is improved, meanwhile, a dust-proof plate and an arc-shaped baffle plate arranged above the heat dissipation opening can effectively prevent dust from entering the interior of the distribution box main body from the heat dissipation opening to achieve the dust-proof effect, and air entering from an air inlet groove and an air inlet hole can be filtered through a filter plate on the filtering base, make the dust in the air can't enter into the inside of block terminal main part for dustproof effect is better.
Description
Technical Field
the invention relates to a multifunctional low-voltage distribution box, and belongs to the technical field of distribution boxes.
Background
The distribution box is a mass parameter on data, generally forms a low-voltage distribution box by assembling switching equipment, measuring instruments, protective electrical appliances and auxiliary equipment in a closed or semi-closed metal box or on a screen according to the electrical connection requirement. In normal operation, the circuit can be switched on or off by means of a manual or automatic switch. The distribution box has the characteristics of small volume, simple and convenient installation, special technical performance, fixed position, unique configuration function, no field limitation, universal application, stable and reliable operation, high space utilization rate, less occupied area and environmental protection effect. Switchgear, measuring instrument, protection electrical apparatus and auxiliary assembly are in sealed or semi-closed metal-back, when the temperature is higher in the day, current low voltage distribution box can not be autonomic ventilate the heat dissipation, it is too low to make the ventilation cooling efficiency, can not play fine ventilation cooling effect, cause its inside electronic components impaired easily, and current distribution box is when ventilating, when the dust in the air is more, the air gets into the inside to the distribution box, the inside at the distribution box can be remained to the dust, make the distribution box need clear up.
Disclosure of Invention
The invention provides a multifunctional low-voltage distribution box which effectively solves the problems in the prior art.
In order to solve the technical problems, the invention provides the following technical scheme:
The invention discloses a multifunctional low-voltage distribution box which comprises a box body assembly, a box cover assembly, a heat dissipation assembly and a filtering base, wherein the box cover assembly is arranged at the front end of the box body assembly, the heat dissipation assembly is arranged above the box body assembly, and the filtering base is arranged below the box body assembly.
as a preferred technical scheme of the invention, the box body assembly comprises a distribution box main body and a sealing groove, the side wall of the opening at the front end of the distribution box main body is provided with the sealing groove, the box cover assembly comprises a cover plate, a first hinge, an observation port, a first embedding groove, a transparent glass plate, a first embedding frame and a first bolt, the cover plate is hinged on the side wall of the front end of the distribution box main body through the first hinge, the cover plate and the sealing groove are arranged in a matched manner, the plate wall of the cover plate, which is far away from the distribution box main body, is provided with the observation port, the plate wall of the cover plate, which is close to one side of the distribution box main body, is provided with the first embedding groove, the size of the first embedding groove is larger than that of the observation port, the first embedding groove is communicated with the observation port, the transparent glass plate and the first embedding frame are arranged inside the first embedding groove, the transparent glass plate is arranged at one side, which, the size of transparent glass board is greater than the size of viewing aperture, the first four corners department of inlaying the frame and keeping away from transparent glass board lateral wall all is provided with first bolt, first frame of inlaying is through first bolt and apron fixed connection.
As a preferred technical scheme of the invention, the heat dissipation assembly comprises a top plate, a heat dissipation opening, a fixing frame, a heat dissipation fan, a support sleeve, heat dissipation holes and a dust guard, wherein the top plate is fixedly connected to the top of the distribution box main body, the top plate is provided with the heat dissipation opening, the heat dissipation opening is communicated with the interior of the distribution box main body, the heat dissipation fan is fixedly connected to the interior of the heat dissipation opening through the fixing frame, the top of the top plate is fixedly connected with the support sleeve, the side walls of the periphery of the support sleeve are provided with the heat dissipation holes, and one end, far away from the top plate, of the support sleeve is fixedly.
The filter base is composed of a support plate, a second scarf joint groove, a mounting groove, a filter plate, an air inlet groove, air inlet holes, a second hinge and a second embedded frame, the support plate is fixedly connected to the bottom of the distribution box main body, the second scarf joint groove is formed in the top of the support plate, the mounting groove is formed in the inner bottom of the second scarf joint groove, the filter plate is arranged inside the mounting groove, the air inlet groove is formed in the inner bottom of the mounting groove, the air inlet holes are formed in the inner wall of the periphery of the air inlet groove at equal intervals, the air inlet holes penetrate through the support plate, the second embedded frame is embedded inside the second scarf joint groove, and one end of the second embedded frame is hinged to the inner wall of the second scarf joint groove through the second hinge.
As a preferred technical scheme of the present invention, the heat dissipation fan comprises an air guide sleeve, a servo motor, a fixing hoop, a fixing rod, a rotating shaft and a fan blade, wherein the air guide sleeve is fixedly connected with a fixing frame, the servo motor is arranged inside the air guide sleeve, the fixing hoop is sleeved on the outer wall of the servo motor, the fixing rods are fixedly connected to the outer walls on the two sides of the fixing hoop, the other end of each fixing rod is fixedly connected with the inner wall of the air guide sleeve, the rotating shaft is fixedly connected to the shaft wall of the output end of the servo motor through a coupling, and the fan blade is fixedly connected to one end of the rotating shaft, which is far away.
As a preferred technical scheme of the invention, arc-shaped baffles are fixedly connected around the dust guard, and a heat dissipation seam is arranged between each arc-shaped baffle and the top plate.
According to a preferable technical scheme of the invention, a clamping block is fixedly connected to the outer wall of one end, away from the second hinge, of the second embedding frame, a clamping groove is formed in the inner wall of the second embedding groove corresponding to the clamping block, and the clamping groove is matched with the clamping block.
As a preferable technical solution of the present invention, the inner wall of the distribution box main body is coated with a rubber insulating layer.
The invention has the following beneficial effects: the multifunctional low-voltage distribution box is simple in structure and convenient to use, the sealing groove matched with the cover plate is formed in the distribution box main body, so that the sealing effect between the cover plate and the distribution box main body is better, air in the distribution box main body can be discharged from the heat dissipation opening through the heat dissipation fan in the heat dissipation assembly, ventilation and heat dissipation can be effectively performed on the interior of the distribution box main body, the ventilation and heat dissipation efficiency is improved, meanwhile, the dust-proof plate and the arc-shaped baffle plate which are arranged above the heat dissipation opening can effectively prevent dust from entering the interior of the distribution box main body from the heat dissipation opening, the dustproof effect is achieved, and air entering from the air inlet hole and the air inlet groove can be filtered through the filter plate on the filter base, so that the dust in the air can not enter the interior of the distribution box main body, and.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the cover of the present invention in an open configuration;
FIG. 3 is a schematic view of the internal structure of the cover assembly of the present invention;
FIG. 4 is a schematic view of the internal structure of the heat dissipating fan of the present invention;
Fig. 5 is a schematic view of the filter base of the present invention.
In the figure: 1. a case assembly; 11. a distribution box main body; 12. a sealing groove; 2. a case lid assembly; 21. a cover plate; 22. a first hinge; 23. a viewing port; 24. a first scarf joint groove; 25. a transparent glass plate; 26. a first bezel; 27. a first bolt; 3. a heat dissipating component; 31. a top plate; 32. a heat dissipation opening; 33. a fixed mount; 34. a heat dissipation fan; 341. an air guide sleeve; 342. a servo motor; 343. a fixing hoop; 344. fixing the rod; 345. a rotating shaft; 346. a fan blade; 35. a support sleeve; 36. heat dissipation holes; 37. a dust-proof plate; 38. an arc-shaped baffle plate; 39. heat dissipation seams; 4. a filter base; 41. a support plate; 42. a second scarf joint groove; 43. mounting grooves; 44. filtering the plate; 45. an air inlet groove; 46. an air inlet; 47. a second hinge; 48. a second bezel; 49. a clamping block; 410. a clamping groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b): as shown in fig. 1 to 5, the multifunctional low-voltage distribution box of the present invention includes a box body assembly 1, a box cover assembly 2, a heat dissipation assembly 3, and a filter base 4, wherein the box cover assembly 2 is disposed at a front end of the box body assembly 1, the heat dissipation assembly 3 is disposed above the box body assembly 1, and the filter base 4 is disposed below the box body assembly 1.
Wherein, the box body component 1 comprises a distribution box main body 11 and a sealing groove 12, the sealing groove 12 is provided on the side wall of the opening at the front end of the distribution box main body 11, the box cover component 2 comprises a cover plate 21, a first hinge 22, an observation port 23, a first scarf joint groove 24, a transparent glass plate 25, a first scarf joint frame 26 and a first bolt 27, the cover plate 21 is hinged on the side wall at the front end of the distribution box main body 11 through the first hinge 22, the cover plate 21 is matched with the sealing groove 12, the observation port 23 is provided on the plate wall at the side of the cover plate 21 far away from the distribution box main body 11, the first scarf joint groove 24 is provided on the plate wall at the side of the cover plate 21 close to the distribution box main body 11, the size of the first scarf joint groove 24 is larger than the size of the observation port 23, the first scarf joint groove 24 is communicated with the observation port 23, the transparent glass plate 25 and the first scarf joint frame 26 are provided, the transparent glass plate 25 is arranged on one side close to the observation port 23 in the first scarf joint groove 24, the size of the transparent glass plate 25 is larger than that of the observation port 23, the four corners of the transparent glass plate 25 side wall are kept away from by the first embedded frame 26 are provided with first bolts 27, and the first embedded frame 26 is fixedly connected with the cover plate 21 through the first bolts 27.
Wherein, radiator unit 3 comprises roof 31, heat dissipation opening 32, mount 33, heat dissipation fan 34, support sleeve 35, louvre 36 and dust guard 37, roof 31 fixed connection is at the top of distribution box main part 11, heat dissipation opening 32 has been seted up on roof 31, heat dissipation opening 32 and distribution box main part 11's inside intercommunication, mount 33 fixedly connected with heat dissipation fan 34 is passed through to heat dissipation opening 32's inside, the top fixedly connected with support sleeve 35 of roof 31, a plurality of louvres 36 have all been seted up on support sleeve 35 lateral wall all around, the one end fixedly connected with dust guard 37 of roof 31 is kept away from to support sleeve 35.
Wherein, filter base 4 inlays the frame 48 by backup pad 41, second scarf joint groove 42, mounting groove 43, filter plate 44, air inlet groove 45, inlet port 46, second hinge 47 and second and constitutes, backup pad 41 fixed connection is in the bottom of distribution box main part 11, second scarf joint groove 42 has been seted up at backup pad 41's top, mounting groove 43 has been seted up to the interior bottom of second scarf joint groove 42, the inside of mounting groove 43 is provided with filter plate 44, air inlet groove 45 has been seted up to the interior bottom of mounting groove 43, a plurality of inlet port 46 has been seted up to air inlet groove 45 equidistant on inner wall all around, inlet port 46 runs through backup pad 41, the inside of second scarf joint groove 42 has been inlayed the frame 48 by the second hinge 47, the one end that the second inlayed the frame 48 is articulated with the inner wall of second scarf joint groove 42 by the second hinge 47.
The heat dissipation fan 34 is composed of an air guide sleeve 341, a servo motor 342, a fixed hoop 343, a fixed rod 344, a rotating shaft 345 and fan blades 346, the air guide sleeve 341 is fixedly connected with the fixed frame 33, the servo motor 342 is arranged inside the air guide sleeve 341, the fixed hoop 343 is sleeved on the outer wall of the servo motor 342, the fixed rods 344 are fixedly connected to the outer walls of two sides of the fixed hoop 343, the other end of the fixed rod 344 is fixedly connected with the inner wall of the air guide sleeve 341, the rotating shaft 345 is fixedly connected to the shaft wall of the output end of the servo motor 342 through a coupler, and the fan blades 346 are fixedly connected to one end, far away from the servo motor 342, of the rotating shaft 345.
wherein, equal fixedly connected with cowl 38 all around of dust guard 37, be provided with heat dissipation seam 39 between cowl 38 and roof 31, dustproof effect that can effectual improvement dust guard 37.
The second embedding frame 48 is fixedly connected with a clamping block 49 on the outer wall far away from one end of the second hinge 47, a clamping groove 410 is formed in the inner wall of the second embedding groove 42 corresponding to the clamping block 49, the clamping groove 410 is matched with the clamping block 49, the clamping block 49 is clamped in the clamping groove 410, the second embedding frame 48 can be fixed, and the use is convenient.
Wherein, the inner wall of the distribution box main body 11 is coated with a rubber insulating layer.
Specifically, when the invention is used, the distribution box is fixedly installed through the tab ears on the outer walls of the two sides of the distribution box main body 11, after the installation is completed, the switching device, the measuring instrument, the protective electrical appliance and the auxiliary device are assembled inside the distribution box main body 11, when the upper box cover assembly 2 is closed, the condition inside the distribution box main body 11 can be visually observed through the observation port 23, the sealing groove 12 matched with the cover plate 21 is formed on the distribution box main body 11, so that the sealing effect between the cover plate 21 and the distribution box main body 11 is better, when the temperature inside the distribution box main body 11 is higher than the temperature of the outside air, the servo motor 342 is started through the external power supply, the output shaft of the servo motor 342 drives the rotating shaft 345 to rotate, the rotating shaft 345 drives the fan blades 346 to rotate inside the air guide sleeve 341 when rotating, wind flow is formed, and the hot air inside the distribution box main body 11 is discharged to the, inside hot-air of support sleeve 35 is discharged by louvre 36, can be fast effectual carry out ventilation cooling to the inside of block terminal main part 11, ventilation cooling effect is better, dust guard 37 and cowl 38 that heat dissipation opening 32's top set up can effectually prevent that the dust from getting into to the inside of block terminal main part 11 by heat dissipation opening 32, reach dustproof effect, in the heat dissipation, because the inside air of block terminal main part 11 has been discharged, so external air enters into to the inside of air inlet duct 45 by inlet port 46, the inside air of air inlet duct 45 enters into the inside to block terminal main part 11 after the filtration of filter plate 44, reach circulation ventilation's effect, the components and parts to block terminal main part 11 inside cool down that dispel the heat.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a multi-functional low voltage distribution box, its characterized in that includes box subassembly (1), case lid subassembly (2), radiator unit (3) and filters base (4), case lid subassembly (2) set up the front end in box subassembly (1), radiator unit (3) set up the top in box subassembly (1), filter base (4) and set up the below in box subassembly (1).
2. The multifunctional low-voltage distribution box of claim 1, wherein the box body assembly (1) comprises a distribution box main body (11) and a sealing groove (12), the sealing groove (12) is formed in a side wall of an opening at the front end of the distribution box main body (11), the box cover assembly (2) comprises a cover plate (21), a first hinge (22), an observation port (23), a first scarf joint groove (24), a transparent glass plate (25), a first embedded frame (26) and a first bolt (27), the cover plate (21) is hinged to the side wall of one side of the front end of the distribution box main body (11) through the first hinge (22), the cover plate (21) is matched with the sealing groove (12), the observation port (23) is formed in a plate wall of the cover plate (21) far away from the distribution box main body (11), the first scarf joint groove (24) is formed in a plate wall of the cover plate (21) near the side of the distribution box main body (11), the size of first scarf joint groove (24) is greater than the size of viewing aperture (23), just first scarf joint groove (24) and viewing aperture (23) intercommunication, the inside of first scarf joint groove (24) is provided with transparent glass board (25) and first inlay frame (26), transparent glass board (25) set up in the inside one side that is close to viewing aperture (23) of first scarf joint groove (24), the size of transparent glass board (25) is greater than the size of viewing aperture (23), the four corners department that transparent glass board (25) a curb wall was kept away from in first inlay frame (26) all is provided with first bolt (27), first inlay frame (26) through first bolt (27) and apron (21) fixed connection.
3. The multifunctional low-voltage distribution box according to claim 2, characterized in that said heat dissipating assembly (3) is composed of a top plate (31), a heat dissipating opening (32), a fixing frame (33), a heat dissipating fan (34), a supporting sleeve (35), heat dissipating holes (36) and a dust guard (37), the top plate (31) is fixedly connected with the top of the distribution box main body (11), a heat dissipation opening (32) is formed in the top plate (31), the heat dissipation opening (32) is communicated with the interior of the distribution box main body (11), the interior of the heat dissipation opening (32) is fixedly connected with a heat dissipation fan (34) through a fixing frame (33), the top of the top plate (31) is fixedly connected with a supporting sleeve (35), the side walls of the periphery of the supporting sleeve (35) are all provided with a plurality of heat dissipation holes (36), one end of the supporting sleeve (35) far away from the top plate (31) is fixedly connected with a dust guard (37).
4. the multifunctional low-voltage distribution box according to claim 2, wherein the filtering base (4) is composed of a supporting plate (41), a second scarf joint groove (42), a mounting groove (43), a filtering plate (44), an air inlet groove (45), air inlet holes (46), a second hinge (47) and a second scarf frame (48), the supporting plate (41) is fixedly connected to the bottom of the distribution box main body (11), the second scarf joint groove (42) is formed in the top of the supporting plate (41), the mounting groove (43) is formed in the inner bottom of the second scarf joint groove (42), the filtering plate (44) is arranged inside the mounting groove (43), the air inlet groove (45) is formed in the inner bottom of the mounting groove (43), the air inlet holes (46) are formed in the inner wall of the periphery of the air inlet groove (45) at equal intervals, and the air inlet holes (46) penetrate through the supporting plate (41), the inside scarf joint of second scarf joint groove (42) has second scarf frame (48), the one end of second scarf frame (48) is articulated through the inner wall of second hinge (47) with second scarf joint groove (42).
5. The multifunctional low-voltage distribution box of claim 3, wherein the heat dissipation fan (34) is composed of an air guiding sleeve (341), a servo motor (342), a fixing hoop (343), a fixing rod (344), a rotating shaft (345) and fan blades (346), the air guide sleeve (341) is fixedly connected with the fixed frame (33), a servo motor (342) is arranged inside the air guide sleeve (341), a fixed hoop (343) is sleeved on the outer wall of the servo motor (342), fixed rods (344) are fixedly connected on the outer walls of the two sides of the fixed hoop (343), the other end of the fixed rod (344) is fixedly connected with the inner wall of the air guide sleeve (341), a rotating shaft (345) is fixedly connected on the shaft wall of the output end of the servo motor (342) through a coupler, one end of the rotating shaft (345) far away from the servo motor (342) is fixedly connected with a fan blade (346).
6. a multifunctional low-voltage distribution box according to claim 3, characterized in that said dust guard (37) is fixedly connected with an arc-shaped baffle (38) around, and a heat-dissipating seam (39) is arranged between said arc-shaped baffle (38) and said top plate (31).
7. The multifunctional low-voltage distribution box according to claim 4, wherein a clamping block (49) is fixedly connected to an outer wall of one end, away from the second hinge (47), of the second embedding frame (48), a clamping groove (410) is formed in the inner wall of the second embedding groove (42) and corresponds to the clamping block (49), and the clamping groove (410) is matched with the clamping block (49).
8. A multifunctional low-voltage distribution box according to claim 2, characterized in that the inner wall of said box body (11) is coated with a rubber insulating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910856456.0A CN110571675A (en) | 2019-09-11 | 2019-09-11 | Multifunctional low-voltage distribution box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910856456.0A CN110571675A (en) | 2019-09-11 | 2019-09-11 | Multifunctional low-voltage distribution box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110571675A true CN110571675A (en) | 2019-12-13 |
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ID=68778958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910856456.0A Pending CN110571675A (en) | 2019-09-11 | 2019-09-11 | Multifunctional low-voltage distribution box |
Country Status (1)
| Country | Link |
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| CN (1) | CN110571675A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114759460A (en) * | 2022-06-15 | 2022-07-15 | 山东科技职业学院 | Distribution box cover plate |
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| CN206564420U (en) * | 2017-03-20 | 2017-10-17 | 李向建 | A kind of Portable scattered heat low distribution box |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114759460A (en) * | 2022-06-15 | 2022-07-15 | 山东科技职业学院 | Distribution box cover plate |
| CN114759460B (en) * | 2022-06-15 | 2022-08-12 | 山东科技职业学院 | Distribution box cover plate |
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Application publication date: 20191213 |
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| RJ01 | Rejection of invention patent application after publication |