CN220822235U - Electric power cabinet - Google Patents
Electric power cabinet Download PDFInfo
- Publication number
- CN220822235U CN220822235U CN202322132870.1U CN202322132870U CN220822235U CN 220822235 U CN220822235 U CN 220822235U CN 202322132870 U CN202322132870 U CN 202322132870U CN 220822235 U CN220822235 U CN 220822235U
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- cabinet body
- cabinet
- wall
- rotating
- groove
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- 239000000428 dust Substances 0.000 claims description 46
- 230000007246 mechanism Effects 0.000 claims description 26
- 238000001816 cooling Methods 0.000 claims description 11
- 238000009423 ventilation Methods 0.000 claims description 11
- 230000005484 gravity Effects 0.000 claims description 5
- 230000017525 heat dissipation Effects 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000005855 radiation Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 8
- 230000035699 permeability Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 206010044565 Tremor Diseases 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The utility model discloses an electric power cabinet, which belongs to the technical field of electric power cabinets and is provided with a heat radiation structure.
Description
Technical Field
The utility model belongs to the technical field of power cabinets, and particularly relates to a power cabinet.
Background
The utility model provides a power cabinet rack is a novel life electrical apparatus for low-voltage distribution device and large-scale control equipment are installed, and inside device module formula installation, optional various crossbeams, vertical beam structure widely are used for electric power, electronic control trade, in the use of power cabinet, and inside device during operation can produce heat, if the heat is too high can lead to the device to damage, consequently need to cool down to the inside electric power cabinet.
The Chinese patent publication number is as follows: the electric power tool cabinet with the heat radiation structure comprises a cabinet body, wherein the front end of the cabinet body is rotationally connected with a cabinet door through a hinge, the upper end of the cabinet body is fixedly connected with a mounting cover, the side wall of the mounting cover is provided with a ventilation hole, and an air inlet and heat radiation fan is fixedly connected in the mounting cover; this scheme adopts the mode of fan and thermovent, comes the internal portion of cabinet to cool down through driving outside air and the internal gaseous flow of cabinet to set up the dust screen at the thermovent, prevent that the dust in the air from getting into the internal back absorption of cabinet at the device surface and leading to the radiating effect to descend, but will have a large amount of dust absorption on the dust screen surface after long-time use, lead to the dust screen gas permeability to become worse, the cooling effect reduces.
For this purpose, we propose an electric cabinet to solve the above problems.
Disclosure of utility model
The utility model aims to solve the problem that in the prior art, most of existing power cabinets are inconvenient to clean dust, so that the cooling effect is reduced.
In order to achieve the above purpose, according to one aspect of the present utility model, there is provided an electric power cabinet, including a cabinet body, one end of the cabinet body is hinged with a door panel, a side wall of the door panel is attached to an inner wall of the cabinet body, an inner wall of one side of the cabinet body far away from the housing is provided with a plurality of heat dissipation openings, one side of the cabinet body far away from the housing is provided with a rain shield, the rain shield is located at a top of the heat dissipation openings, one side of the cabinet body is provided with a ventilation mechanism for cooling, the ventilation mechanism includes a housing fixedly arranged at one side of the cabinet body, one side of the housing is provided with a through air duct, a connection part between the air duct and the cabinet body is further provided with an empty groove, a fan is arranged between the inner walls of the empty groove, a dust screen is arranged between the inner walls of the air duct, one side of the dust screen is provided with a knocking column, a round rod is rotationally connected between the inner walls of the air duct, and the bottom of the round rod is connected with a counterweight ball through a rotation mechanism;
During heat dissipation, the rotating mechanism drives the counterweight ball to lift until the counterweight ball impacts the knocking column under the action of gravity, and the knocking column impacts the dust screen to facilitate ash removal.
Preferably, the rotating mechanism comprises a pair of rotating blocks, the rotating blocks are fixedly connected with the periphery of the round rod, a rotating rod is rotatably connected between the two rotating blocks, and the bottom of the rotating rod is fixedly connected with the top of the counterweight ball.
Preferably, one end of the shell is provided with a motor, and an output shaft of the motor penetrates through the side wall of the shell and is coaxially connected with one end of the round rod.
Preferably, the air duct bottom wall is provided with a chute, the chute bottom wall is provided with a semicircular groove, one side of the semicircular groove is rotationally connected with an auger, one side of the casing, which is far away from the cabinet body, is provided with an arc-shaped plate, and the side wall of the auger is attached to the inner wall of the semicircular groove and the inner wall of the arc-shaped plate.
Preferably, the fixing mechanism comprises a fixing plate, the fixing plate is located inside the cabinet body, round holes penetrating through the fixing plate are formed in four corners of one end of the fixing plate, bolts are connected in the round holes in a sliding mode, and nuts are connected to one end of each bolt in a threaded mode.
Preferably, a pair of mounting frames are arranged in the cabinet body, one end of each mounting frame is provided with a plurality of square grooves which penetrate through the mounting frame, and the square grooves are in plug-in fit with the bolts.
The utility model provides an electric power cabinet, which comprises a cabinet body, wherein a door plate is hinged at one end of the cabinet body, the side wall of the door plate is attached to the inner wall of the cabinet body, a plurality of radiating holes are formed in the inner wall of one side, far away from the shell, of the cabinet body, a rain shield is arranged on one side, far away from the shell, of the cabinet body, the rain shield is positioned at the top of the radiating holes, a ventilation mechanism for cooling is arranged on one side of the cabinet body, the ventilation mechanism comprises a shell fixedly arranged on one side of the cabinet body, a penetrating air groove is formed in one side of the shell, an empty groove is further formed in the joint of the air groove and the cabinet body, a fan is arranged between the inner walls of the empty groove, a dust screen is arranged between the inner walls of the air groove, a knocking column is arranged on one side of the dust screen, a round rod is rotatably connected between the inner walls of the air groove, and the bottom of the round rod is connected with a counterweight ball through a rotating mechanism.
Preferably, the rotating mechanism comprises a pair of rotating blocks, the rotating blocks are fixedly connected with the periphery of the round rod, a rotating rod is rotatably connected between the two rotating blocks, and the bottom of the rotating rod is fixedly connected with the top of the counterweight ball.
Preferably, one end of the shell is provided with a motor, and an output shaft of the motor penetrates through the side wall of the shell and is coaxially connected with one end of the round rod.
Preferably, the air duct bottom wall is provided with a chute, the chute bottom wall is provided with a semicircular groove, one side of the semicircular groove is rotationally connected with an auger, one side of the casing, which is far away from the cabinet body, is provided with an arc-shaped plate, and the side wall of the auger is attached to the inner wall of the semicircular groove and the inner wall of the arc-shaped plate.
In summary, the technical effects and advantages of the present utility model are: this electric power cabinet, through round bar and counter weight ball and the dust screen that sets up, when more dust is adsorbed on the dust screen surface, make the round bar drive the dwang and rotate, the dwang rotates between two dwang, the counter weight ball follows the dwang and removes, when the round bar rotated to certain angle, the counter weight ball falls under the effect of gravity and strikes the post, the round bar lasts the rotation, the counter weight ball will strike repeatedly and strike the post, drive the dust screen and vibrate, make the dust on its surface be tremble off, thereby be convenient for clear up dust adsorbed on the dust screen surface, the dust screen gas permeability variation has been avoided, the condition that leads to the cooling effect to reduce.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a schematic cross-sectional view of a housing structure according to the present utility model;
FIG. 3 is a schematic cross-sectional view of the cabinet structure of the utility model;
FIG. 4 is a schematic view showing the disassembly of the structure of the fixing plate and the mounting frame of the present utility model;
FIG. 5 is a schematic cross-sectional view of a housing structure according to the present utility model;
Fig. 6 is a schematic view showing the separation of the dust screen and the knocking column structure according to the present utility model.
In the figure: 1. a cabinet body; 2. a housing; 3. a wind groove; 4. a dust screen; 5. knocking the column; 6. a round bar; 7. a weight ball; 8. a door panel; 9. a rotating block; 10. a rotating lever; 11. a motor; 12. a chute; 13. a semicircular groove; 14. an auger; 15. an arc-shaped plate; 16. a hollow groove; 17. a fan; 18. a heat radiation port; 19. a rain shield; 20. a fixing plate; 21. a round hole; 22. a bolt; 23. a nut; 24. a mounting frame; 25. a square groove; 26. a clamping groove; 27. an expansion screw; 28. and (5) supporting legs.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
Referring to fig. 1, 5 and 6, an electric power cabinet, including the cabinet body 1, the inside ventilation mechanism and the fixed establishment that are used for the cooling that are provided with of cabinet body 1, cabinet body 1 one side fixedly connected with casing 2, the wind groove 3 that runs through has been seted up to casing 2 one side, fixedly connected with dust screen 4 between the wind groove 3 inner wall, its main aim at: prevent that dust in the air from getting into cabinet body 1 and leading to the radiating effect decline, 4 one side fixedly connected with of dust screen strikes post 5, rotates between the 3 inner walls of wind groove and is connected with round bar 6, its main aim at: the counterweight ball 7 is driven to strike the knocking column 5, so that the dust screen 4 oscillates and shakes dust, the counterweight ball 7 is connected to the bottom of the round rod 6 through the rotating mechanism, the door plate 8 is hinged to one end of the cabinet body 1, and the side wall of the door plate 8 is attached to the inner wall of the cabinet body 1.
As shown in fig. 6, in the rotating mechanism for preventing the weight ball 7 from being jammed during the rotating process, the rotating mechanism includes a pair of rotating blocks 9, the rotating blocks 9 are fixedly connected with the periphery of the round bar 6, a rotating bar 10 is rotatably connected between the two rotating blocks 9, the bottom of the rotating bar 10 is fixedly connected with the top of the weight ball 7, the round bar 6 is enabled to rotate, the rotating blocks 9 are driven to rotate, the rotating blocks 9 are rotatably connected with the rotating bar 10, the rotating bar 10 rotates between the two rotating blocks 9, the weight ball 7 moves along with the rotating bar 10, when the round bar 6 rotates to a certain angle, the weight ball 7 falls under the action of gravity and impacts the knocking post 5, the rotating bar 10 is driven to rotate between the two rotating blocks 9, the round bar 6 continuously rotates, and the weight ball 7 repeatedly impacts the knocking post 5.
Referring to fig. 6, in order to drive the round bar 6 to rotate, a motor 11 is fixedly connected to one end of the housing 2, and an output shaft of the motor 11 passes through a side wall of the housing 2 and is coaxially connected to one end of the round bar 6, so that the motor 11 is electrified to work, and the output shaft drives the round bar 6 to rotate.
Referring to fig. 5, considering that dust needs to be convenient for collect, chute 12 has been seted up to wind groove 3 diapire, semicircular groove 13 has been seted up to chute 12 diapire, semicircular groove 13 one side rotation is connected with auger 14, one side fixedly connected with arc 15 of cabinet body 1 is kept away from to casing 2, auger 14 lateral wall and semicircular groove 13 inner wall and arc 15 inner wall laminating, dust on dust screen 4 surface is shaken off and falls into semicircular groove 13 through chute 12, remove the dust bag to arc 15 below and open the sack, make auger 14 rotate, push down the dust in the semicircular groove 13 from arc 15 top and fall into the dust bag, thereby be convenient for collect dust that dust screen 4 was gone down.
Among the ventilation mechanism for cooling in the above-mentioned, as shown in fig. 2 and 3, this ventilation mechanism includes the empty slot 16, the empty slot 16 is seted up and is close to the one side inner wall of casing 2 in cabinet body 1, empty slot 16 and wind groove 3 intercommunication, install fan 17 between the empty slot 16 inner wall, a plurality of thermovent 18 have been seted up to the one side inner wall that casing 2 was kept away from to cabinet body 1, one side fixedly connected with weather shield 19 that casing 2 was kept away from to cabinet body 1, weather shield 19 is located thermovent 18 top, make fan 17 work, drive cabinet body 1 outside and inside and air flow, the air in cabinet body 1 outside gets into cabinet body 1 through wind groove 3 and empty slot 16, take away the heat that the device produced and discharge through thermovent 18, thereby dispel the heat to the device.
In the above fixing mechanism for fixing different devices, please refer to fig. 4, the fixing mechanism includes a fixing plate 20, the fixing plate 20 is located inside the cabinet 1, four corners at one end of the fixing plate 20 are provided with through holes 21, bolts 22 are slidably connected in the holes 21, nuts 23 are screwed at one end of the bolts 22, a plurality of devices are fixed at one end of the fixing plate 20, and the fixing plate 20 is fixed in the cabinet 1 through the threaded connection of the bolts 22 and the nuts 23, so as to fix the different devices.
During use, the fixing plate 20 needs to be convenient to adjust and fix the position in the cabinet body 1, and referring to fig. 4, a pair of mounting frames 24 are fixedly connected in the cabinet body 1, a plurality of square grooves 25 penetrating through are formed in one end of each mounting frame 24, the square grooves 25 are in plug-in fit with the bolts 22, the fixing plate 20 and the bolts 22 are moved, the bolts 22 are respectively in plug-in fit with the square grooves 25 on the pair of mounting frames 24, and the bolts 22 and the nuts 23 are rotated to enable threaded connection of the bolts and the nuts, so that the position of the fixing plate 20 can be conveniently adjusted.
In addition, in order to be convenient for fix the cabinet body 1 under different service conditions, as shown in fig. 1 and 3, so the clamping groove 26 has all been seted up to the one end four corners department that door plant 8 was kept away from to the cabinet body 1, the joint has the expansion screw 27 in the clamping groove 26, the equal fixedly connected with supporting leg 28 in cabinet body 1 bottom four corners department, when needs install this device and use on the wall body, fix a plurality of expansion screws 27 suitable position on the wall body respectively, the one end and the clamping groove 26 joint that the cabinet body 1 makes expansion screw 27 again moves, when needs place subaerial use with this device, the cabinet body 1 just can be fixed through a plurality of supporting legs 28.
Working principle: when the device is installed, firstly, a plurality of expansion screws 27 are respectively fixed at proper positions on a wall body by workers, then the cabinet body 1 is moved to enable one end of each expansion screw 27 to be in clamping fit with a clamping groove 26, the cabinet body 1 is fixed on the wall body, or the cabinet body 1 can be directly placed on the ground to be fixed through supporting legs 28, then a plurality of devices are fixed at one end of a fixing plate 20, the fixing plate 20 and a plurality of bolts 22 are moved to enable the bolts 22 to be respectively in inserting fit with a plurality of square grooves 25 on a pair of mounting frames 24, then the bolts 22 and nuts 23 are rotated to enable the bolts 22 to be in threaded connection with each other, the fixing plate 20 is fixed at proper positions in the cabinet body 1, when in operation, the fan 17 is enabled to work to drive the outside and the inside of the cabinet body 1 to flow, air at the outside of the cabinet body 1 enters the cabinet body 1 through the air grooves 3 and the air grooves 16, heat generated by the devices is taken away and then is discharged through the heat dissipation openings 18, when the dust in the air is blocked outside the cabinet body 1 through the dust-proof net 4, when the dust-proof net 4 absorbs more dust, the motor 11 is electrified to work, the output shaft drives the round rod 6 to rotate, the round rod 6 drives the rotating blocks 9 to rotate, the rotating rod 10 rotates between the two rotating blocks 9, the counterweight ball 7 moves along with the rotating rod 10, when the round rod 6 rotates to a certain angle, the counterweight ball 7 falls under the action of gravity and impacts the knocking column 5 to drive the rotating rod 10 to rotate between the two rotating blocks 9, the round rod 6 continuously rotates, the counterweight ball 7 repeatedly impacts the knocking column 5 to drive the dust-proof net 4 to vibrate, the dust on the surface of the dust-proof net is shaken off and falls into the semicircular groove 13 through the chute 12, then the dust-collecting bag is moved to the lower part of the arc 15 and the bag opening is opened, the auger 14 rotates, the dust in the semicircular groove 13 is pushed down from the top of the arc 15 and falls into the dust-collecting bag, thereby be convenient for clear up and collect dust that dust screen 4 surface adsorbed, prevent dust screen 4 gas permeability variation, lead to the cooling effect to reduce.
Claims (10)
1. The utility model provides an electric power cabinet, includes cabinet body (1), cabinet body (1) one end articulates there is door plant (8), door plant (8) lateral wall and cabinet body (1) inner wall laminating, cabinet body (1) are kept away from one side inner wall of casing (2) and are equipped with a plurality of thermovent (18), cabinet body (1) are kept away from one side of casing (2) and are equipped with weather shield (19), weather shield (19) are located thermovent (18) top, its characterized in that:
The novel cooling cabinet is characterized in that a ventilation mechanism for cooling is arranged on one side of the cabinet body (1), the ventilation mechanism comprises a shell (2) fixedly arranged on one side of the cabinet body (1), a through air groove (3) is formed in one side of the shell (2), an empty groove (16) is further formed in the joint of the air groove (3) and the cabinet body (1), a fan (17) is arranged between the inner walls of the empty groove (16), a dust screen (4) is arranged between the inner walls of the air groove (3), a knocking column (5) is arranged on one side of the dust screen (4), a round rod (6) is connected between the inner walls of the air groove (3) in a rotating mode, and a counterweight ball (7) is connected to the bottom of the round rod (6) through a rotating mechanism;
during heat dissipation, the rotating mechanism drives the counterweight ball (7) to lift until the counterweight ball impacts the knocking column (5) under the action of gravity, and the knocking column (5) impacts the dust screen (4) to facilitate ash removal.
2. The power cabinet of claim 1, wherein: the rotating mechanism comprises a pair of rotating blocks (9), the rotating blocks (9) are fixedly connected with the periphery of the round rod (6), a rotating rod (10) is rotatably connected between the two rotating blocks (9), and the bottom of the rotating rod (10) is fixedly connected with the top of the counterweight ball (7).
3. The power cabinet of claim 2, wherein: one end of the shell (2) is provided with a motor (11), and an output shaft of the motor (11) penetrates through the side wall of the shell (2) and is coaxially connected with one end of the round rod (6).
4. The power cabinet of claim 1, wherein: the utility model discloses a cabinet, including cabinet body (1), wind groove (3), spout (12) diapire is equipped with chute (12), chute (13) one side is rotated and is connected with auger (14), one side that cabinet body (1) was kept away from to casing (2) is equipped with arc (15), auger (14) lateral wall and semicircle groove (13) inner wall and arc (15) inner wall laminating.
5. The power cabinet of claim 1, wherein: still include fixed establishment, fixed establishment includes fixed plate (20), fixed plate (20) are located cabinet body (1) inside, fixed plate (20) one end four corners department all is equipped with round hole (21) that run through, sliding connection has bolt (22) in round hole (21), bolt (22) one end threaded connection has nut (23).
6. The power cabinet of claim 5, wherein: the novel cabinet is characterized in that a pair of mounting frames (24) are arranged inside the cabinet body (1), a plurality of square grooves (25) penetrating through the mounting frames (24) are formed in one end of each mounting frame, and the square grooves (25) are in plug-in fit with the bolts (22).
7. The utility model provides an electric power cabinet, includes cabinet body (1), cabinet body (1) one end articulates there is door plant (8), door plant (8) lateral wall and cabinet body (1) inner wall laminating, cabinet body (1) are kept away from one side inner wall of casing (2) and are equipped with a plurality of thermovent (18), cabinet body (1) are kept away from one side of casing (2) and are equipped with weather shield (19), weather shield (19) are located thermovent (18) top, its characterized in that:
One side of the cabinet body (1) is provided with a ventilation mechanism for cooling,
The utility model provides a cabinet, including set firmly in casing (2) of cabinet body (1) one side, casing (2) one side is equipped with wind groove (3) that run through, wind groove (3) still are equipped with empty slot (16) with cabinet body (1) junction, be equipped with fan (17) between empty slot (16) inner wall, be equipped with dust screen (4) between wind groove (3) inner wall, dust screen (4) one side is equipped with strikes post (5), rotate between wind groove (3) inner wall and be connected with round bar (6), round bar (6) bottom is connected with counter weight ball (7) through rotary mechanism.
8. The power cabinet of claim 7, wherein: the rotating mechanism comprises a pair of rotating blocks (9), the rotating blocks (9) are fixedly connected with the periphery of the round rod (6), a rotating rod (10) is rotatably connected between the two rotating blocks (9), and the bottom of the rotating rod (10) is fixedly connected with the top of the counterweight ball (7).
9. The power cabinet of claim 8, wherein: one end of the shell (2) is provided with a motor (11), and an output shaft of the motor (11) penetrates through the side wall of the shell (2) and is coaxially connected with one end of the round rod (6).
10. The power cabinet of claim 7, wherein: the utility model discloses a cabinet, including cabinet body (1), wind groove (3), spout (12) diapire is equipped with chute (12), chute (13) one side is rotated and is connected with auger (14), one side that cabinet body (1) was kept away from to casing (2) is equipped with arc (15), auger (14) lateral wall and semicircle groove (13) inner wall and arc (15) inner wall laminating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322132870.1U CN220822235U (en) | 2023-08-09 | 2023-08-09 | Electric power cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322132870.1U CN220822235U (en) | 2023-08-09 | 2023-08-09 | Electric power cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220822235U true CN220822235U (en) | 2024-04-19 |
Family
ID=90706779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322132870.1U Active CN220822235U (en) | 2023-08-09 | 2023-08-09 | Electric power cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220822235U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119799349A (en) * | 2025-03-11 | 2025-04-11 | 陕西精益化工有限公司 | A carbon-based oxygen-enriched combustion device and method for tail gas circulation |
-
2023
- 2023-08-09 CN CN202322132870.1U patent/CN220822235U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119799349A (en) * | 2025-03-11 | 2025-04-11 | 陕西精益化工有限公司 | A carbon-based oxygen-enriched combustion device and method for tail gas circulation |
| CN119799349B (en) * | 2025-03-11 | 2025-05-23 | 陕西精益化工有限公司 | A carbon-based oxygen-enriched combustion device and method for tail gas circulation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240411 Address after: No. 269 Shenzhou 3rd Road, Chang'an District, Xi'an City, Shaanxi Province, 710000, Building 6, Unit 1, 8th Floor, No.1 Patentee after: Zheng Aifang Country or region after: China Address before: No. 1766 Kuixing Street, Chenggong District, Kunming City, Yunnan Province, 650000 Patentee before: Yang Fei Country or region before: China |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240508 Address after: 710000, Room 2801, Unit 1, Building 7, Hangdu Oasis, Shenzhousan Road, National Civil Aerospace Industry Base, Xi'an City, Shaanxi Province Patentee after: Shaanxi Yinghao Power Technology Co.,Ltd. Country or region after: China Address before: No. 269 Shenzhou 3rd Road, Chang'an District, Xi'an City, Shaanxi Province, 710000, Building 6, Unit 1, 8th Floor, No.1 Patentee before: Zheng Aifang Country or region before: China |