CN108770269B - High leakproofness and high thermal diffusivity's robotic control cabinet - Google Patents
High leakproofness and high thermal diffusivity's robotic control cabinet Download PDFInfo
- Publication number
- CN108770269B CN108770269B CN201810816484.5A CN201810816484A CN108770269B CN 108770269 B CN108770269 B CN 108770269B CN 201810816484 A CN201810816484 A CN 201810816484A CN 108770269 B CN108770269 B CN 108770269B
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- cabinet
- plate
- heat dissipation
- circulation
- cabinet body
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- 239000003570 air Substances 0.000 claims abstract description 79
- 230000017525 heat dissipation Effects 0.000 claims abstract description 30
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 239000012080 ambient air Substances 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 230000006872 improvement Effects 0.000 description 12
- 239000000428 dust Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading 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
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/06—Hermetically-sealed casings
-
- 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
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
-
- 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
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
- H05K7/20145—Means for directing air flow, e.g. ducts, deflectors, plenum or guides
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention relates to a robot control cabinet with high tightness and high heat dissipation, which comprises a cabinet provided with a sealed inner cavity and an L-shaped air duct, and a double-circulation heat dissipation mechanism arranged in the cabinet; the double-circulation heat dissipation mechanism circularly sucks and discharges heat in the sealed inner cavity, and circularly sucks and discharges ambient air outside the cabinet in the L-shaped air duct so as to take away the heat in the cabinet; the cabinet comprises a cabinet body with an open front side, a left front door and a right front door hinged at the opening of the cabinet body, and an air outlet arranged on the outer side of the cabinet body; the double-circulation heat dissipation mechanism comprises a radiator A and a radiator B, wherein the radiator A and the radiator B are respectively provided with an inner circulation air inlet and an inner circulation air outlet, an outer circulation air inlet and an outer circulation air outlet, and the double-circulation heat dissipation mechanism also comprises a fan A and a fan B. The invention ensures the high tightness of the control cabinet and simultaneously can realize higher heat dissipation performance.
Description
Technical Field
The invention relates to the technical field of robots, in particular to a robot control cabinet with high sealing performance and high heat dissipation performance.
Background
With the development of the strategy of the chinese manufacture 2025, the robot industry is increasingly widely used in the manufacturing and service industries. In addition, the cost of manpower in China is increased, and the further development of the boosting robot industry is accelerated. The application of robots is gradually spreading in various fields. However, some environments with a high dust concentration and a high humidity cause problems for the normal operation of the robot.
The control cabinet is used as a control center of the robot, and the normal operation of the control cabinet needs to provide certain environment protection such as dust prevention, water mist prevention and the like for electric components in the cabinet. Particularly in application environments such as carrying, polishing, welding and the like, dust, water mist and the like are unavoidable, and the waterproof and dustproof problems can be further solved by improving the tightness of the control cabinet.
However, when the tightness of the control cabinet is improved, the heating of components in the control cabinet brings new challenges to the normal operation of the control cabinet, and a good heat dissipation scheme needs to be added, so that the design of the robot control cabinet with high tightness and high heat dissipation becomes a necessary way for the application and popularization of robots, and is also a difficult problem to be solved urgently.
Disclosure of Invention
In order to solve the technical problems, the invention provides a robot control cabinet with high sealing performance and high heat dissipation performance.
The technical problems to be solved by the invention are realized by adopting the following technical scheme:
a robot control cabinet with high tightness and high heat dissipation comprises a cabinet provided with a sealed inner cavity and an L-shaped air duct and a double-circulation heat dissipation mechanism arranged in the cabinet; the double-circulation heat dissipation mechanism circularly sucks and discharges heat in the sealed inner cavity, and circularly sucks and discharges ambient air outside the cabinet in the L-shaped air duct so as to take away the heat in the cabinet.
As a further improvement of the invention, the cabinet comprises a cabinet body with an open front side, a left front door and a right front door hinged at the opening of the cabinet body, and an air outlet arranged on the outer side of the cabinet body, wherein the L-shaped air duct is connected to the left side and the rear side in the cabinet body; the sealed inner cavity is enclosed by the outer side of the cabinet body, the L-shaped air duct, the left front door and the right front door which are closed.
As a further improvement of the invention, the number of the air outlets is two, and the air outlets are respectively arranged at the left upper side and the rear upper side of the cabinet body.
As a further improvement of the invention, the double-circulation heat dissipation mechanism comprises a radiator A and a radiator B which are arranged in the L-shaped air duct and positioned at the left side, wherein the radiator A and the radiator B are respectively provided with an inner circulation air inlet and an inner circulation air outlet which are communicated with the sealed inner cavity, an outer circulation air inlet and an outer circulation air outlet which are communicated with the inside of the L-shaped air duct, a fan B which is arranged in an air outlet in the cabinet body and connected with the inner circulation air inlet, and a fan A which is arranged outside the cabinet body and used for sucking ambient air.
As a further improvement of the invention, the inner circulation air inlet and the inner circulation air outlet are both axially vertical to the corresponding L-shaped air duct side wall.
As a further improvement of the invention, the cabinet body comprises a bottom plate, a left side plate, a right side plate and a rear plate which are connected to the bottom plate, and a cover plate which is connected to the left side plate, the right side plate and the rear plate, wherein the rear plate is respectively connected with the left side plate and the right side plate.
The inner side of the L-shaped air duct comprises a bottom plate, a left main back supporting plate and a main back supporting plate which are connected to the bottom plate and are mutually connected, and a front supporting plate connected with the left main back supporting plate; the outside of L type wind channel includes back plate, apron and left side board.
As a further improvement of the invention, the edge joint of the left main back support plate, the main back support plate and the right side plate is provided with a U-shaped plate for reinforcing the support.
As a further improvement of the invention, the U-shaped plate can be provided with through hole grooves or circular through holes which are arranged at equal intervals.
As a further improvement of the invention, the lower end of the bottom plate is provided with supporting feet, and the supporting feet are provided with U-shaped notches.
As a further improvement of the invention, the cabinet is provided with a hanging ring which penetrates through the cover plate and is connected with the main back support plate and used for hanging.
As a further improvement of the invention, a U-shaped bending plate for sealing is arranged at the joint of the left front door and the right front door.
As a further improvement of the invention, a small door sealing plate is arranged at the joint of the cabinet and the left front door and the right front door when the cabinet is closed.
As a further improvement of the invention, a power switch, an alarm indicator light, an emergency stop button and a door lock are arranged on the left front door.
The beneficial effects of the invention are as follows: the invention ensures high tightness of the control cabinet and can realize higher heat dissipation performance, and adopts a closed inner cavity structure and a double-circulation heat dissipation mechanism, thereby greatly improving the blocking capability to dust and water mist, furthest utilizing the radiator and having the advantages of high structural strength, strong safety and high placement stability.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a schematic perspective view of the present invention with a portion of the cover plate removed;
FIG. 2 is a schematic view of the structure of the present invention in the rear view direction;
FIG. 3 is a schematic view of the structure of the invention in the rear view with a portion of the cabinet removed;
FIG. 4 is a top view of the present invention with the cover plate removed;
FIG. 5 is an enlarged view of a portion at I of FIG. 4;
FIG. 6 is an enlarged view of a portion at II of FIG. 4;
FIG. 7 is an enlarged view of a portion of FIG. 4 at III;
FIG. 8 is an enlarged view of a portion at IV of FIG. 4;
FIG. 9 is a schematic diagram of the junction of the left front door and the right front door of the present invention;
FIG. 10 is a schematic diagram of a U-shaped plate of the present invention;
fig. 11 is a front view of the present invention.
Detailed Description
The present invention will be further described in the following to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the present invention easy to understand.
As shown in fig. 1 to 11, a robot control cabinet with high tightness and high heat dissipation performance comprises a cabinet provided with a sealed inner cavity and an L-shaped air duct 4, and a double-circulation heat dissipation mechanism arranged in the cabinet; the double-circulation heat dissipation mechanism circularly sucks and discharges heat in the sealed inner cavity, and circularly sucks and discharges ambient air outside the cabinet in the L-shaped air duct 4 so as to take away heat in the cabinet.
The cabinet comprises a cabinet body with an open front side, a left front door 13 and a right front door 11 hinged at the opening of the cabinet body, and an air outlet 15 arranged on the outer side of the cabinet body, and the L-shaped air duct 4 is connected to the left side and the rear side of the cabinet body; the sealed inner cavity is enclosed by the cabinet body, the outer side of the L-shaped air duct 4, a left front door 13 and a right front door 11 which are closed.
The number of the air outlets 15 is two, and the two air outlets are respectively arranged on the left upper side and the rear upper side of the cabinet body.
The double-circulation heat dissipation mechanism comprises a radiator A22 and a radiator B18 which are arranged in an L-shaped air duct 4 and positioned at the left side, wherein the radiator A22 and the radiator B18 are respectively provided with an inner circulation air inlet 20 and an inner circulation air outlet 21 which are communicated with a sealed inner cavity, an outer circulation air inlet 23 and an outer circulation air outlet 24 which are communicated with the inside of the L-shaped air duct 4, and a fan B19 which is arranged in an air outlet in a cabinet body and connected with the inner circulation air inlet 20, and a fan A16 which is arranged outside the cabinet body and used for sucking ambient air. When the heat-conducting device is used, the air inlet of the cabinet is positioned at the fan A16 and is positioned below the air outlet 15, the radiator and other components in the L-shaped air duct 4 are positioned between the two air inlets on the space height of the cabinet, and the hot air of the components in the cabinet is guided by the fan B19 to pass through the heat-conducting film on the inner side of the radiator almost completely through the sealed inner cavity of the control cabinet and then enter the component environment in the control cabinet, and the heat-conducting device is circularly reciprocated, so that the capacity of the radiator can be utilized to the greatest extent, and the heat of the inner cavity of the control cabinet can be taken away to the greatest extent.
The inner circulation air inlet 20 and the inner circulation air outlet 21 are both axially perpendicular to the corresponding side walls of the L-shaped air duct 4.
The cabinet body comprises a bottom plate 2, a left side plate 14, a right side plate 8, a rear plate 9 and a cover plate 10, wherein the left side plate 14, the right side plate 8 and the rear plate 9 are connected to the bottom plate 2, and the rear plate 9 is respectively connected with the left side plate 14 and the right side plate 8.
The inner side of the L-shaped air duct 4 comprises a bottom plate 2, a left main back support plate 5 and a main back support plate 6 which are connected to the bottom plate 2 and are connected with each other, and a front support plate 3 connected with the left main back support plate 5; the outer side of the L-shaped air duct 4 comprises a rear plate 9, a cover plate 10 and a left side plate 14.
The edge joint of the left main back support plate 5, the main back support plate 6 and the right side plate 8 is provided with a U-shaped plate 7 for reinforcing support. Therefore, the framework strength of the cabinet is enhanced, and electric components can be conveniently mounted on the outer side folded edge of the U-shaped plate 7, and the function expansion of customers when necessary is also convenient. In addition, a small through hole can be reserved on the outer folded edge of the U-shaped plate 7, so that wiring in the cabinet is convenient to bind, and devices in the cabinet are placed more succinctly and attractive.
The U-shaped plate 7 can be provided with through hole grooves 7a or circular through holes 7b which are arranged at equal intervals. The through hole groove 7a is convenient for component installation and expansion of other components, and the circular through hole 7b is convenient for wiring bundling in the cabinet.
The lower extreme of bottom plate 2 is equipped with supporting legs 1, be equipped with U type breach 1a on the supporting legs 1. The overall weight of the cabinet can be borne better, and in addition, the U-shaped notch 1a enables the cabinet to be placed on certain ground with certain concave and convex areas, so that the cabinet can maintain stability better.
The cabinet is provided with a hanging ring 12 which penetrates through the cover plate 10 and is connected with the main back support plate 6 and used for hanging. This hoisting structure can make the rack disperse the connection structure of drawing force when lifting by crane, guarantees that the overall structure of rack possesses higher security.
The joint of the left front door 13 and the right front door 11 is provided with a U-shaped bending plate 17 for sealing. In the embodiment, the cabinet adopts a double door scheme, so that the operation such as component installation and overhaul of a user is facilitated.
A small door sealing plate 25 is arranged at the joint of the cabinet when the left front door 13 and the right front door 11 are closed. The cabinet is provided with the attached elastic material at the joint of the left front door 13 and the right front door 11, so that the control cabinet can achieve good sealing performance.
The left front door 13 is provided with a power switch 26, an alarm indicator lamp 27, an emergency stop button 28 and a door lock 29. The starting and stopping of the electric power in the control cabinet are realized, and the danger alarm is realized.
In use, the fan B19 pumps heat generated and released by components in the cabinet into the inner circulation air inlets 20 of the radiator A22 and the radiator B18 to dissipate the heat, and flows out of the inner circulation air outlets 21, wherein the process is performed in the inner cavity side of the aluminum foil of the radiator.
Then, while the above process is performed, the fan a16 pumps the ambient air outside the cabinet into the L-shaped air duct 4 and diverges the ambient air around, wherein a part of the ambient air freely rises to the air outlet 15 to leave the cabinet, and radiates heat to components of the air duct accessories in the process of leaving the ambient air, and the other part of the ambient air enters the radiator a22 and the external circulation air inlet 23 of the radiator B18, flows outside the aluminum foil of the radiator, brings out heat circulating in the air in the inner cabinet of the aluminum foil through heat conduction, and finally leaves from the air outlet 15 of the cabinet, thereby playing a role of radiating heat.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides a high leakproofness and high heat dissipation's robot control cabinet which characterized in that: the device comprises a cabinet provided with a sealed inner cavity and an L-shaped air duct (4), and a double-circulation heat dissipation mechanism arranged in the cabinet; the double-circulation heat dissipation mechanism circularly sucks and discharges heat in the sealed inner cavity, and circularly sucks and discharges ambient air outside the cabinet in the L-shaped air duct (4) so as to take away the heat in the cabinet; the cabinet comprises a cabinet body with an open front side, a left front door (13) and a right front door (11) hinged at the opening of the cabinet body, and an air outlet (15) arranged on the outer side of the cabinet body; the L-shaped air duct (4) is connected to the left side and the rear side in the cabinet body; the sealed inner cavity is enclosed by the cabinet body, the outer side of the L-shaped air duct (4) and the closed left front door (13) and right front door (11); the double-circulation heat dissipation mechanism comprises a radiator A (22) and a radiator B (18) which are arranged in the L-shaped air duct (4);
the radiator A (22) and the radiator B (18) are respectively provided with an inner circulation air inlet (20) and an inner circulation air outlet (21) which are communicated with the sealed inner cavity, and an outer circulation air inlet (23) and an outer circulation air outlet (24) which are communicated with the L-shaped air duct (4);
the air conditioner also comprises a fan B (19) arranged in the cabinet body and connected with the internal circulation air inlet (20), and a fan A (16) arranged outside the cabinet body and used for sucking ambient air;
the cabinet body comprises a bottom plate (2), a left side plate (14) and a right side plate (8) which are connected to the bottom plate (2), a rear plate (9) and a cover plate (10) which is connected to the left side plate (14) and the right side plate (8) and the rear plate (9), wherein the rear plate (9) is respectively connected with the left side plate (14) and the right side plate (8);
the inner side of the L-shaped air duct (4) comprises a bottom plate (2), a left main back support plate (5) and a main back support plate (6) which are connected to the bottom plate (2) and are mutually connected, and a front support plate (3) connected with the left main back support plate (5); the outer side of the L-shaped air duct (4) comprises a rear plate (9), a cover plate (10) and a left side plate (14).
2. The robotic control cabinet with high tightness and high heat dissipation according to claim 1, wherein: the number of the air outlets (15) is two, and the two air outlets are respectively arranged on the left upper side and the rear upper side of the cabinet body.
3. The robotic control cabinet with high tightness and high heat dissipation according to claim 2, wherein: the inner circulation air inlet (20) and the inner circulation air outlet (21) are axially perpendicular to the outer sides of the corresponding L-shaped air channels (4).
4. The robotic control cabinet with high tightness and high heat dissipation according to claim 1, wherein: the edge joint of the left main back supporting plate (5), the main back supporting plate (6) and the right side plate (8) is provided with a U-shaped plate (7) for reinforcing the support.
5. The robotic control cabinet with high tightness and high heat dissipation according to claim 1, wherein: the lower extreme of bottom plate (2) is equipped with supporting legs (1), be equipped with U type breach (1 a) on supporting legs (1).
6. The robotic control cabinet with high tightness and high heat dissipation according to claim 1, wherein: the cabinet is provided with a hanging ring (12) which penetrates through the cover plate (10) and is connected with the main back support plate (6) and used for hanging.
7. The robotic control cabinet with high tightness and high heat dissipation according to claim 1, wherein: the joint of the left front door (13) and the right front door (11) is provided with a U-shaped bending plate (17) for sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810816484.5A CN108770269B (en) | 2018-07-24 | 2018-07-24 | High leakproofness and high thermal diffusivity's robotic control cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810816484.5A CN108770269B (en) | 2018-07-24 | 2018-07-24 | High leakproofness and high thermal diffusivity's robotic control cabinet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108770269A CN108770269A (en) | 2018-11-06 |
| CN108770269B true CN108770269B (en) | 2023-12-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810816484.5A Active CN108770269B (en) | 2018-07-24 | 2018-07-24 | High leakproofness and high thermal diffusivity's robotic control cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108770269B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111472948B (en) * | 2020-06-03 | 2021-03-09 | 南通名濠新能源科技有限公司 | Wind power generation control device |
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|---|---|---|---|---|
| CN2919789Y (en) * | 2006-06-13 | 2007-07-04 | 廉纪奎 | Self-heat-exchanging type machine cabinet |
| CN201022254Y (en) * | 2007-02-15 | 2008-02-13 | 中兴通讯股份有限公司 | A heat dispersion device for sealed outdoor case |
| CN101784169A (en) * | 2009-01-15 | 2010-07-21 | 中兴通讯股份有限公司 | Outdoor unit cabinet with heat dissipation structure |
| CN201590601U (en) * | 2009-09-30 | 2010-09-22 | 艾默生网络能源有限公司 | Outdoor power cabinet |
| CN204539655U (en) * | 2015-04-14 | 2015-08-05 | 安徽埃夫特智能装备有限公司 | A kind of control cubicle for robot |
| WO2015155426A1 (en) * | 2014-04-10 | 2015-10-15 | Emerson Network Power Industrial Systems | Electrical cabinet intended for uses in hazardous environments |
| CN208462222U (en) * | 2018-07-24 | 2019-02-01 | 埃夫特智能装备股份有限公司 | A kind of robot control cabinet of high leakproofness and high-cooling property |
-
2018
- 2018-07-24 CN CN201810816484.5A patent/CN108770269B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2919789Y (en) * | 2006-06-13 | 2007-07-04 | 廉纪奎 | Self-heat-exchanging type machine cabinet |
| CN201022254Y (en) * | 2007-02-15 | 2008-02-13 | 中兴通讯股份有限公司 | A heat dispersion device for sealed outdoor case |
| CN101784169A (en) * | 2009-01-15 | 2010-07-21 | 中兴通讯股份有限公司 | Outdoor unit cabinet with heat dissipation structure |
| CN201590601U (en) * | 2009-09-30 | 2010-09-22 | 艾默生网络能源有限公司 | Outdoor power cabinet |
| WO2015155426A1 (en) * | 2014-04-10 | 2015-10-15 | Emerson Network Power Industrial Systems | Electrical cabinet intended for uses in hazardous environments |
| CN204539655U (en) * | 2015-04-14 | 2015-08-05 | 安徽埃夫特智能装备有限公司 | A kind of control cubicle for robot |
| CN208462222U (en) * | 2018-07-24 | 2019-02-01 | 埃夫特智能装备股份有限公司 | A kind of robot control cabinet of high leakproofness and high-cooling property |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108770269A (en) | 2018-11-06 |
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