CN117377285A - Water-cooling heat dissipation power cabinet and application method thereof - Google Patents
Water-cooling heat dissipation power cabinet and application method thereof Download PDFInfo
- Publication number
- CN117377285A CN117377285A CN202311466459.6A CN202311466459A CN117377285A CN 117377285 A CN117377285 A CN 117377285A CN 202311466459 A CN202311466459 A CN 202311466459A CN 117377285 A CN117377285 A CN 117377285A
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- Prior art keywords
- power cabinet
- frame
- water
- heat dissipation
- heating module
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- 238000001816 cooling Methods 0.000 title claims abstract description 54
- 230000017525 heat dissipation Effects 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 85
- 238000010438 heat treatment Methods 0.000 claims abstract description 29
- 239000000110 cooling liquid Substances 0.000 claims abstract description 14
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 7
- 238000005192 partition Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20927—Liquid coolant without phase change
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Power Engineering (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention discloses a water-cooling heat dissipation power cabinet and a use method thereof, wherein a power cabinet door is arranged on a power cabinet frame; the heating module is arranged on the power cabinet frame; the power cabinet frame is a hollow frame with mutually communicated interiors, water-cooling liquid is arranged in the power cabinet frame, one end of the power cabinet frame is provided with a water-cooling pipeline water inlet, and the other end of the power cabinet frame is provided with a water-cooling pipeline water outlet; a plurality of through hole areas are formed in the power cabinet door, and a fan is arranged at one end, opposite to the power cabinet door, of the power cabinet frame. On the basis of the original frame of the power cabinet, the invention enables the whole frame to form a water flow channel, and can be used for solving the heat dissipation problem in the power cabinet of the existing power electronic transformer. The heat dissipation safety of the power cabinet can be ensured, and the energy consumption can be saved. The water-cooling and air-cooling heat dissipation method can be used for solving the heat dissipation problem in the power cabinet of the existing power electronic transformer. The heat dissipation safety of the power cabinet can be ensured, and the energy consumption can be saved.
Description
Technical Field
The invention belongs to the technical field of power electronics and thermal management, and particularly relates to a water-cooling heat dissipation power cabinet and a use method thereof.
Background
In modern power systems, the power cabinet of a power electronic transformer plays a crucial role, and the power electronic transformer is a novel transformer technology, and realizes the transformation and transmission of electric energy through semiconductor devices and high-frequency transformation technologies. The power converter has the advantages of small volume, light weight and high transmission efficiency, and can be used for power conversion and power control application.
Traditionally, the cooling measure in the power cabinet adopts air cooling heat dissipation, and air enters through a small hole of a cabinet door and is pumped out by a fan, so that the cooling effect is achieved. Because the electronic components in the power cabinet are closely arranged, and the area of the back plate in the power cabinet is large, the air cooling effect is not ideal. Due to the fact that economy and space occupation ratio are considered, components are densely distributed in the power cabinet, and a traditional cooling mode cannot meet the heat dissipation requirement of the power cabinet of a modern power electronic transformer.
The patent application of the power cabinet with the patent publication number of CN108092490A and the name of a partitioned heat dissipation comprises a cabinet body, a power module, a reactor and a filter capacitor which are arranged in the cabinet body, and also comprises an air duct partition plate which is arranged in the cabinet body, wherein the air duct partition plate and a front door plate of the cabinet body partition the cabinet body into a first heat dissipation area and a second heat dissipation area, and the air duct partition plate and a rear door plate of the cabinet body form a third heat dissipation area; and an upper portion of the first heat dissipation area and the second heat dissipation area. Although the heat dissipation of the power cabinet can be realized, the heat dissipation effect is not strong only through the fan, and the heat dissipation device is not suitable for the power cabinet with large heat productivity.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention aims to provide a water-cooling heat dissipation power cabinet and a use method thereof, which can fully cover the heat dissipation requirement and solve the problem of high heat generation of electronic components in the power cabinet through the combination of air cooling and water cooling.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a water cooled heat sink power cabinet comprising:
the power cabinet comprises a power cabinet frame, wherein a power cabinet door is arranged on the power cabinet frame;
the heating module is arranged on the power cabinet frame;
the power cabinet frame is a hollow frame with mutually communicated interiors, water-cooling liquid is arranged in the power cabinet frame, a water-cooling pipeline water inlet is formed in one end of the power cabinet frame, and a water-cooling pipeline water outlet is formed in the other end of the power cabinet frame; the power cabinet is characterized in that a plurality of through hole areas are formed in the power cabinet door, and a fan is arranged at one end, opposite to the power cabinet door, of the power cabinet frame.
Optionally, the power cabinet frame includes bottom frame, middle level frame and upper frame, placed the transformer in the bottom frame, placed the low pressure module that generates heat in the middle level frame, placed the high pressure module that generates heat in the upper frame.
Optionally, a middle layer gasket is arranged under each low-voltage heating module of the middle layer frame, and an upper layer gasket is arranged under each high-voltage heating module of the upper layer frame; the middle layer gasket is connected with the top of the middle layer frame, and the upper layer gasket is connected with the top of the upper layer frame.
Optionally, a top layer frame is arranged above an upper layer frame of the power cabinet frame, and a transverse reinforcing plate is arranged on a frame body of the top layer frame.
Optionally, the upper frame is connected with the middle frame through a plurality of risers, and the risers are perpendicular to the middle frame.
Optionally, the water cooling pipeline water inlet is arranged at the bottom of the power cabinet frame, and the water cooling pipeline water outlet is arranged at the top of the power cabinet frame.
Optionally, the water inlet of the water cooling pipeline and the water outlet of the water cooling pipeline are respectively arranged on a group of opposite angles of the power cabinet frame.
Optionally, the through hole of the through hole area is rectangular.
Optionally, a rear plate is disposed at an end of the power cabinet frame opposite to the power cabinet door, and a plurality of through holes are formed in the rear plate.
The application method of the water-cooling heat dissipation power cabinet comprises the following steps of:
when the heating module starts to work, the fan is turned on;
when the temperature of the heating module exceeds the normal working temperature, water-cooling liquid is introduced from the water inlet of the water-cooling pipeline and flows out from the water outlet of the water-cooling pipeline;
and stopping introducing the water cooling liquid when the temperature of the heating module is at the normal working temperature.
Compared with the prior art, the invention has the following beneficial effects:
components such as a transformer, a capacitor, an inductor and the like in the power cabinet are arranged on the internal frame, and the frame plays a role in fixing and bearing. To reduce the weight of the power cabinet, the frame is usually made of hollow rectangular profiles. On the basis of the original frame of the power cabinet, the power cabinet is only used as a frame with a supporting function to be modified, so that the whole frame forms a water flow channel, the hollow frame is used for modifying the water flow channel, the water flow pipeline becomes a loop, the circulation of water-cooling liquid is ensured, and a better cooling effect is achieved. The invention can be adjusted according to the internal layout of the power electronic transformer power cabinet. This improves the applicability of the invention and can be flexibly adapted to the specific situation to achieve an optimal heat dissipation solution. The invention can realize water cooling and heat dissipation of all components, and meanwhile, the positions and the layout of the components and the external dimension of the power cabinet are not required to be changed, and only the connecting positions of the profile on the frame are required to be opened to form a water flow channel, and the water inlet and the water outlet are added on the frame, so that the defects of air cooling and heat dissipation can be overcome. The invention can improve the heat dissipation efficiency in the power cabinet of the power electronic transformer, ensure the normal operation of devices and reduce the potential risk of system faults. The improved water cooling structure utilizes excellent heat conductivity to realize more comprehensive and stable heat dissipation and cooling effects. The device can effectively take away heat generated by the heating module and the transformer, and avoid the influence of overhigh temperature on the performance and service life of components. In addition, the improved water cooling structure ensures the stable operation of devices in the power cabinet by reducing the temperature of air in the power cabinet. This helps to reduce the risk of failure, reduce the system failure rate and maintenance costs, and improve the reliability and availability of the overall power system.
The water-cooling and air-cooling heat dissipation method can be used for solving the heat dissipation problem in the power cabinet of the existing power electronic transformer. The heat dissipation safety of the power cabinet can be ensured, and the energy consumption can be saved.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, proportional sizes, and the like of the respective components in the drawings are merely illustrative for aiding in understanding the present invention, and are not particularly limited. In the drawings:
FIG. 1 is an isometric view of a power cabinet of the present invention;
FIG. 2 is an isometric view of the interior of the power cabinet of the present invention;
FIG. 3 is a front view of the interior of the power cabinet of the present invention;
FIG. 4 is a rear view of the interior of the power cabinet of the present invention;
FIG. 5 is a graph showing the distribution of water-cooled liquid according to the present invention;
1, a power cabinet door; 2. a blower; 3. a power cabinet frame; 4. a water outlet of the water-cooling pipeline; 5. a rear plate; 6. a reinforcing plate; 7. a high-pressure heating module; 8. an upper layer gasket; 9. a low-voltage heating module; 10. a middle layer gasket; 11. an iron core; 12. a coil; 13. a water inlet of the water-cooling pipeline; 14. a riser; 15. water cooling liquid; 16. and a via region.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. 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, shall fall within the scope of the invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, a water-cooled heat dissipation power cabinet of the present invention includes: the power cabinet door 1, the fan 2, the heating module and the power cabinet frame 3.
The power cabinet door 1 is connected to the power cabinet frame 3. The power cabinet door 1 is provided with a plurality of through hole areas 16, and the fan 2 is arranged at one end of the power cabinet frame 3 opposite to the power cabinet door 1. The through holes of the through hole region 16 are rectangular, so that ventilation effect can be improved. Specifically, the wind speed of the fan 2 is not less than 14m/s.
The heating module is placed on the power cabinet frame 3. The power cabinet frame 3 is a hollow frame with mutually communicated interiors, and water cooling liquid 15 is arranged in the power cabinet frame 3. Optionally, the power cabinet frame 3 is made of aluminum, has good heat conduction performance, is low in cost, can effectively conduct heat, and remarkably improves the cooling effect. The water cooling liquid adopts a mixed liquid of glycol and purified water.
One end of the power cabinet frame 3 is provided with a water cooling pipeline water inlet 13, and the other end is provided with a water cooling pipeline water outlet 4. The water cooling pipeline water inlet 13 is arranged at the bottom of the power cabinet frame 3, and the water cooling pipeline water outlet 4 is arranged at the top of the power cabinet frame 3. The water cooling pipeline water inlet 13 and the water cooling pipeline water outlet 4 are respectively arranged on a group of opposite angles of the power cabinet frame 3. The water-cooling liquid 15 of the power cabinet frame 3 flows from the bottom to the top.
Specifically, the water cooling pipeline water inlet 13 and the water cooling pipeline water outlet 4 are respectively sleeved with an annular rubber sealing gasket to prevent water leakage.
The power cabinet frame 3 comprises a bottom layer frame, a middle layer frame and an upper layer frame, wherein a transformer is placed in the bottom layer frame, and the transformer is high in weight and heat generation, so that the transformer is arranged on the bottom layer frame, and not only can the load of the transformer be utilized, but also the prior heat dissipation of the transformer is facilitated. The middle layer frame is internally provided with a low-voltage heating module 9, and the upper layer frame is internally provided with a high-voltage heating module 7.
A middle-layer gasket 10 is arranged under each low-pressure heating module 9 of the middle-layer frame, and an upper-layer gasket 8 is arranged under each high-pressure heating module 7 of the upper-layer frame; the middle layer gasket 10 is connected with the top of the middle layer frame, and the upper layer gasket 8 is connected with the top of the upper layer frame. A top layer frame is arranged above the upper layer frame of the power cabinet frame 3, and a transverse reinforcing plate 6 is arranged on the frame body of the top layer frame. The upper layer frame and the middle layer frame are connected through a plurality of vertical plates 14, and the vertical plates 14 are perpendicular to the middle layer frame.
The power cabinet is characterized in that a rear plate 5 is arranged at one end, opposite to the power cabinet door 1, of the power cabinet frame 3, and a plurality of through holes are formed in the rear plate 5.
A water-cooling heat dissipation power cabinet, when in use:
when the heating module starts to work, the fan 2 is turned on.
When the temperature of the heating module exceeds the normal working temperature, water cooling liquid 15 is introduced from the water inlet 13 of the water cooling pipeline and flows out from the water outlet 4 of the water cooling pipeline.
When the temperature of the heating module is at its normal operating temperature, the water cooling liquid 15 is stopped.
Specifically, the normal operating temperature of the heat generating module is set to 80 ℃.
Examples
A specific embodiment of the present invention will be further described with reference to fig. 5.
In this embodiment, the power cabinet frame 3 includes a cross bar and six vertical bars, and the cross bar is mutually communicated with the vertical bars and is connected by welding. Six montants are arranged according to the rectangle lattice, the horizontal pole includes outside horizontal pole and inside horizontal pole. The bottom layer frame comprises four external cross bars connected with six vertical bars, and the four external cross bars of the bottom layer frame form a rectangular frame. Two mutually perpendicular internal cross bars are connected between two short cross bars in four cross bars of the bottom layer frame, and two ends of the two internal cross bars are connected with the inside of the four external cross bars and are used for supporting the transformer. The transformer comprises an iron core 11 and a coil 12 arranged around the outside of the iron core 11.
The middle layer frame comprises four external cross bars connected with six vertical bars, and the four external cross bars of the middle layer frame form a rectangular frame. Two mutually perpendicular internal cross bars are connected between two short cross bars in four cross bars of middle level frame, and the both ends of two internal cross bars all link to each other with the inside of four outside cross bars, be provided with middle level gasket 10 on two internal cross bars of middle level frame, low pressure heating module 9 has been placed on the middle level gasket 10.
The upper frame comprises four external cross bars connected with six vertical bars, and the four external cross bars of the upper frame form a rectangular frame. Two mutually perpendicular internal cross bars are connected between two shorter cross bars in four cross bars of upper frame, and the both ends of two internal cross bars all link to each other with the inside of four outside cross bars, be provided with upper gasket 8 on the two internal cross bars of upper frame, upper gasket 8 has placed high-pressure heating module 7.
The top layer frame comprises four external cross bars connected with the top ends of the six vertical bars, the four external cross bars of the top layer frame form a rectangular frame, and the rectangle surrounded by the four external cross bars of the top layer frame is identical to the rectangle formed by the six vertical bars in size. The rectangle that four outside crossbars of bottom frame, middle level frame and upper frame each linked is greater than the rectangle that six montants linked. An inner cross bar is arranged in the four outer cross bars of the top layer frame. And among the four external cross bars of the top layer frame, one external cross bar closest to the power cabinet door 1 is provided with a reinforcing plate 6.
The outer cross rod of the bottom layer frame is connected with the water inlet 13 of the water cooling pipeline, and the outer cross rod of the top layer frame is connected with the water outlet 4 of the water cooling pipeline.
The device elements in the above embodiments are conventional device elements unless otherwise specified, and the structural arrangement, operation or control modes in the embodiments are conventional arrangement, operation or control modes in the art unless otherwise specified.
Finally, it is noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention, and that other modifications and equivalents thereof by those skilled in the art should be included in the scope of the claims of the present invention without departing from the spirit and scope of the technical solution of the present invention.
Claims (10)
1. A water cooled heat dissipation power cabinet, comprising:
the power cabinet comprises a power cabinet frame (3), wherein a power cabinet door (1) is arranged on the power cabinet frame (3);
the heating module is arranged on the power cabinet frame (3);
the power cabinet frame (3) is a hollow frame with mutually communicated interiors, water cooling liquid (15) is arranged in the power cabinet frame (3), a water cooling pipeline water inlet (13) is arranged at one end of the power cabinet frame (3), and a water cooling pipeline water outlet (4) is arranged at the other end of the power cabinet frame; a plurality of through hole areas (16) are formed in the power cabinet door (1), and a fan (2) is arranged at one end, opposite to the power cabinet door (1), of the power cabinet frame (3).
2. A water cooled heat dissipating power cabinet according to claim 1, wherein the power cabinet frame (3) comprises a bottom frame, a middle frame and an upper frame, wherein a transformer is placed in the bottom frame, a low voltage heating module (9) is placed in the middle frame, and a high voltage heating module (7) is placed in the upper frame.
3. A water-cooled heat dissipation power cabinet according to claim 2, characterized in that a middle layer gasket (10) is arranged under each low-voltage heating module (9) of the middle layer frame, and an upper layer gasket (8) is arranged under each high-voltage heating module (7) of the upper layer frame; the middle layer gasket (10) is connected with the top of the middle layer frame, and the upper layer gasket (8) is connected with the top of the upper layer frame.
4. A water-cooled heat dissipation power cabinet according to claim 2, characterized in that a top frame is arranged above the upper frame of the power cabinet frame (3), and a transverse reinforcing plate (6) is arranged on the frame body of the top frame.
5. The water-cooled heat dissipation power cabinet as set forth in claim 2 wherein the upper frame and the middle frame are connected by a plurality of risers (14), the risers (14) being perpendicular to the middle frame.
6. A water cooled heat sink power cabinet according to claim 1, characterized in that the water cooled pipe water inlet (13) is arranged at the bottom of the power cabinet frame (3), and the water cooled pipe water outlet (4) is arranged at the top of the power cabinet frame (3).
7. A water cooled heat dissipating power cabinet in accordance with claim 1, wherein the water cooled conduit water inlet (13) and the water cooled conduit water outlet (4) are arranged on a set of diagonal corners of the power cabinet frame (3), respectively.
8. A water cooled heat sink power cabinet according to claim 1, wherein the through holes of the through hole area (16) are rectangular.
9. The water-cooling heat dissipation power cabinet according to claim 1, wherein a rear plate (5) is arranged at one end of the power cabinet frame (3) opposite to the power cabinet door (1), and a plurality of through holes are formed in the rear plate (5).
10. The method of using a water cooled power cabinet as claimed in any one of claims 1-9, comprising the steps of:
when the heating module starts to work, the fan (2) is turned on;
when the temperature of the heating module exceeds the normal working temperature, introducing water cooling liquid (15) from the water inlet (13) of the water cooling pipeline and flowing out from the water outlet (4) of the water cooling pipeline;
and when the temperature of the heating module is the normal working temperature, stopping introducing the water cooling liquid (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311466459.6A CN117377285A (en) | 2023-11-06 | 2023-11-06 | Water-cooling heat dissipation power cabinet and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311466459.6A CN117377285A (en) | 2023-11-06 | 2023-11-06 | Water-cooling heat dissipation power cabinet and application method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117377285A true CN117377285A (en) | 2024-01-09 |
Family
ID=89407619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311466459.6A Pending CN117377285A (en) | 2023-11-06 | 2023-11-06 | Water-cooling heat dissipation power cabinet and application method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117377285A (en) |
-
2023
- 2023-11-06 CN CN202311466459.6A patent/CN117377285A/en active Pending
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