CN216665834U - Heat dissipation mechanism for wind driven generator - Google Patents
Heat dissipation mechanism for wind driven generator Download PDFInfo
- Publication number
- CN216665834U CN216665834U CN202121919647.6U CN202121919647U CN216665834U CN 216665834 U CN216665834 U CN 216665834U CN 202121919647 U CN202121919647 U CN 202121919647U CN 216665834 U CN216665834 U CN 216665834U
- Authority
- CN
- China
- Prior art keywords
- heat dissipation
- box
- fan
- generator
- hole
- 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.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Landscapes
- Wind Motors (AREA)
Abstract
The utility model relates to the technical field of wind driven generators, in particular to a heat dissipation mechanism for a wind driven generator, which comprises a heat dissipation box, the wind driven generator, a fan, a heat dissipation device and a box cover, wherein the wind driven generator is fixedly installed in the heat dissipation box, the fan is fixedly installed on one side in the heat dissipation box, the heat dissipation device is fixedly installed at the top of the wind driven generator, and the box cover is fixedly installed at the top of the heat dissipation box. The utility model has the advantages that: the setting of vent has ensured the circulation of the inside and outside air of heat dissipation case for the heat can not pile up the inside at the heat dissipation case for a long time, and the quantity of fin is a plurality of, and evenly distributed is on the cooling tube, and the area of contact of increase generator body and air, thereby improved the radiating effect, through setting up the fan, when the temperature of heat dissipation incasement portion is higher, start fan corotation, play supplementary radiating effect, reach self-cleaning purpose simultaneously, do not need the manual work to go clean, use manpower sparingly.
Description
Technical Field
The utility model relates to the technical field of wind driven generators, in particular to a heat dissipation mechanism for a wind driven generator.
Background
The wind power generator is an electric power device which converts wind energy into mechanical work, and the mechanical work drives a rotor to rotate so as to finally output alternating current. The wind-driven generator generally comprises wind wheels, a generator, a direction regulator, a tower, a speed-limiting safety mechanism, an energy storage device and other components.
The working principle of the wind driven generator is that the wind wheel rotates under the action of wind force, the kinetic energy of the wind is converted into mechanical energy of a wind wheel shaft, and the generator rotates under the drive of the wind wheel shaft to generate electricity. Wind energy is also solar energy in a broad sense, so that a wind power generator can be said to be a heat energy utilization generator which takes the sun as a heat source and takes the atmosphere as a working medium.
The heat dissipation mechanism for the wind driven generator disclosed in chinese patent CN213298185U drives the rotation of the connecting rotating rod under the action of the rotating motor, drives the rotation of the connecting plate through the rotation of the connecting rotating rod, and makes the surface of the generator quickly dissipate heat through the rotation of the connecting plate, but the heat dissipation mechanism for the wind driven generator has the following disadvantages while solving the problems:
this aerogenerator is with heat dissipation mechanism, the wind-force that the fan rotated the production is cooled down through the surface of radiator-grid to the generator, however, the radiator-grid is located the both sides of heat dissipation case, does not contact with the generator, and the radiating effect is relatively poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides a heat dissipation mechanism for a wind driven generator.
The purpose of the utility model is realized by the following technical scheme: the utility model provides a aerogenerator is with heat dissipation mechanism, includes heat dissipation case, aerogenerator, fan, heat abstractor and case lid, the inside fixed mounting of heat dissipation case has aerogenerator, one side fixed mounting of heat dissipation incasement portion has the fan, aerogenerator's top fixed mounting has heat abstractor, the top fixed mounting of heat dissipation case has the case lid.
Preferably, the heat dissipation case includes box, installation screw, vent, first filter screen, mounting groove and second filter screen, the installation screw has been seted up to the inside bottom of box, the vent has all been seted up to the both sides of box, the inside of vent is provided with first filter screen, the mounting groove has been seted up to one side of box, one side of mounting groove is provided with the second filter screen.
Through adopting above-mentioned technical scheme, each spare part that the heat dissipation case contains and the connected mode between each spare part have been introduced.
Preferably, the wind driven generator comprises a generator body and a fan, and the fan is fixedly connected to the input end of the generator body.
By adopting the technical scheme, all parts contained in the wind driven generator and the connection mode among the parts are introduced.
Preferably, the heat dissipation device comprises a heat dissipation pipe, a connecting block, a through hole and heat dissipation fins, wherein the connecting block is fixedly connected to the two ends of the heat dissipation pipe, the through hole is formed in one side of the connecting block, and the heat dissipation fins are fixedly connected to the outer surface of the heat dissipation pipe.
By adopting the technical scheme, all parts contained in the heat dissipation device and the connection mode among the parts are introduced.
Preferably, the generator body is fixedly installed inside the box body through bolts, a hole is formed in one side, far away from the installation groove, of the box body, and the input end of the generator body is rotatably connected with the box body through the hole.
By adopting the technical scheme, the specific connection mode between the wind driven generator and the heat dissipation box is introduced.
Preferably, the screw holes are formed in the positions, corresponding to the through holes, of the two sides of the generator body, the connecting blocks are fixedly installed on the two sides of the generator body through the through holes and the screw holes through bolts, and the radiating pipes are lapped on the outer surface of the generator body.
By adopting the technical scheme, a specific connection mode between the wind driven generator and the heat dissipation device is introduced.
Preferably, the radiating pipe is made of copper, and the radiating fins are made of aluminum alloy.
Through adopting above-mentioned technical scheme, the material of cooling tube and fin has been introduced.
Preferably, the fan is fixedly installed on one side of the box body through an installation groove.
Through adopting above-mentioned technical scheme, the concrete connection mode between fan and the heat dissipation case has been introduced.
Preferably, the top of the box body is provided with a screw hole, the top of the box cover is provided with a hole, and the box cover is fixedly arranged at the top of the box body through the hole and the screw hole by using a bolt.
Through adopting above-mentioned technical scheme, the concrete connection mode between heat dissipation case and the case lid has been introduced.
Preferably, the number of the radiating fins is multiple, and the radiating fins are uniformly distributed on the outer surface of the radiating pipe.
By adopting the technical scheme, the number and the positions of the radiating fins are introduced.
The utility model has the following advantages:
1. the heat dissipation mechanism for the wind driven generator is provided with a heat dissipation device, the heat dissipation device comprises a heat dissipation pipe, two ends of the heat dissipation pipe are fixedly connected with connecting blocks, one side of each connecting block is provided with a through hole, the outer surface of the heat dissipation pipe is fixedly connected with a heat dissipation fin, two sides of a generator body are provided with screw holes corresponding to the through holes, the connecting blocks are fixedly arranged on two sides of the generator body through the through holes and the screw holes by bolts, the heat dissipation pipes are lapped on the outer surface of the generator body, heat generated by the generator body is transferred from the generator body to the heat dissipation fins and then transferred to the heat dissipation fins by the heat dissipation pipes, the heat is dissipated by the heat dissipation fins, meanwhile, the circulation of air inside and outside the heat dissipation box is ensured, so that the heat cannot be accumulated inside the heat dissipation box for a long time, the number of the heat dissipation fins is multiple, the heat dissipation fins are uniformly distributed on the heat dissipation pipes, and the contact area between the generator body and the air is increased, thereby improving the heat dissipation effect;
2. the heat dissipation mechanism for the wind driven generator is characterized in that the fan is arranged, when the temperature in the heat dissipation box is higher, the fan is started to rotate forwards, air enters the box body from the ventilation opening, the air is discharged from the fan after taking away heat, the effect of assisting heat dissipation is achieved, the first filter screen is arranged, when the air passes through the ventilation opening, the first filter screen blocks impurities in the air, the situation that the impurities enter the box body to damage the generator body or the fan is avoided, when the impurities attached to the first filter screen are more and need to be cleaned, the fan is started to rotate backwards, the air enters the box body from the fan and is discharged from the ventilation opening, the impurities attached to the first filter screen are taken away when the air is discharged, the second filter screen is arranged on one side of the mounting groove away from the fan, when the fan rotates backwards, the second filter screen blocks the impurities in the air, the situation that the impurities enter the box body to damage the generator body or the fan is avoided, when the fan rotates forwards, impurities attached to the second filter screen can be taken away, the purpose of self-cleaning is achieved, manual cleaning is not needed, and manpower is saved.
Drawings
FIG. 1 is a schematic sectional view of the present invention when disassembled;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic structural diagram of a heat dissipation case according to the present invention;
FIG. 4 is a schematic structural view of a wind turbine according to the present invention;
fig. 5 is a schematic structural diagram of the heat dissipation device of the present invention.
In the figure: 1-heat dissipation box, 101-box body, 102-mounting screw hole, 103-ventilation opening, 104-first filter screen, 105-mounting groove, 106-second filter screen, 2-wind driven generator, 201-generator body, 202-fan, 3-fan, 4-heat dissipation device, 401-heat dissipation pipe, 402-connecting block, 403-through hole, 404-heat dissipation plate and 5-box cover.
Detailed Description
The utility model will be further described with reference to the accompanying drawings, but the scope of the utility model is not limited to the following.
As shown in fig. 1-5, a heat dissipation mechanism for a wind power generator comprises a heat dissipation box 1, a wind power generator 2, a fan 3, a heat dissipation device 4 and a box cover 5, wherein the wind power generator 2 is fixedly installed inside the heat dissipation box 1, the fan 3 is fixedly installed on one side inside the heat dissipation box 1, the heat dissipation device 4 is fixedly installed on the top of the wind power generator 2, the box cover 5 is fixedly installed on the top of the heat dissipation box 1, through the arrangement of the fan 3, when the temperature inside the heat dissipation box 1 is high, the fan 3 is started to rotate forward, air enters the box body 101 from a ventilation opening 103, heat is taken away and then is discharged from the fan 3, the effect of auxiliary heat dissipation is achieved, through the arrangement of a first filter screen 104, when the air passes through the ventilation opening 103, the first filter screen 104 blocks impurities in the air, so that the impurities entering the box body 101 are prevented from damaging the generator body 201 or the fan 3, when adnexed impurity is more on first filter screen 104, when needing to clear up, start the fan 3 reversal, the air gets into in the box 101 from fan 3, discharge from vent 103, can take away adnexed impurity on first filter screen 104 during the discharge, through setting up second filter screen 106, second filter screen 106 is located the one side that fan 5 was kept away from to mounting groove 105, when fan 3 reversal, second filter screen 106 blocks the impurity in the air, avoid impurity to cause the harm to generator body 201 or fan 3 in getting into box 101, when fan 3 corotation, can take away adnexed impurity on second filter screen 106, reach self-cleaning purpose, do not need the manual work to go cleanly, the use of manpower sparingly.
As a preferred technical solution of the present invention, as shown in fig. 3, the heat dissipation box 1 includes a box body 101, an installation screw 102, a vent 103, a first filter screen 104, an installation groove 105 and a second filter screen 106, the installation screw 102 is opened at the bottom inside the box body 101, the vent 103 is opened at both sides of the box body 101, the first filter screen 104 is disposed inside the vent 103, the installation groove 105 is opened at one side of the box body 101, and the second filter screen 106 is disposed at one side of the installation groove 105.
As a preferred embodiment of the present invention, as shown in fig. 4, the wind power generator 2 includes a generator body 201 and a fan 202, and the fan 202 is fixedly connected to an input end of the generator body 201.
As a preferred technical solution of the present invention, as shown in fig. 5, the heat dissipation device 4 includes a heat dissipation tube 401, a connection block 402, a through hole 403 and a heat dissipation fin 404, the connection block 402 is fixedly connected to both ends of the heat dissipation tube 401, the through hole 403 is formed on one side of the connection block 402, the heat dissipation fin 404 is fixedly connected to the outer surface of the heat dissipation tube 401, by arranging the heat dissipation device 4, the heat dissipation tube 401 is lapped on the outer surface of the generator body 201, heat generated by the generator body 201 is transferred from the generator body 201 to the heat dissipation tube 401, and then transferred from the heat dissipation tube 401 to the heat dissipation fin 404, and the heat is dissipated by the heat dissipation fin, meanwhile, the arrangement of the ventilation opening 103 ensures the circulation of air inside and outside the heat dissipation box 1, so that the heat is not accumulated inside the heat dissipation box 1 for a long time, the number of the heat dissipation fins 404 is plural, and the heat dissipation fins are uniformly distributed on the heat dissipation tube 401, thereby increasing the contact area between the generator body and the air, thereby improving the heat dissipation effect.
As a preferred embodiment of the present invention, as shown in fig. 1, the generator body 201 is fixedly installed inside the box 101 by bolts, a hole is opened on one side of the box 101 away from the installation groove 105, and the input end of the generator body 201 is rotatably connected to the box 101 through the hole.
As a preferred technical solution of the present invention, as shown in fig. 1, screw holes are formed at positions corresponding to the through holes 403 on both sides of the generator body 201, the connection block 402 is fixedly installed on both sides of the generator body 201 through the through holes 403 and the screw holes by using bolts, and the heat dissipation pipe 401 is lapped on an outer surface of the generator body 201.
As a preferred embodiment of the present invention, the heat dissipation pipe 401 is made of copper, and the heat dissipation fins 404 are made of aluminum alloy.
As a preferred embodiment of the present invention, as shown in fig. 1, the blower 3 is fixedly installed at one side of the case 101 through an installation groove 105.
As a preferred embodiment of the present invention, as shown in fig. 1, a screw hole is formed at the top of the case 101, a hole is formed at the top of the case cover 5, and the case cover 5 is fixedly mounted on the top of the case 101 through the hole and the screw hole by using bolts.
As a preferred embodiment of the present invention, as shown in fig. 5, a plurality of heat dissipation fins 404 are uniformly distributed on the outer surface of the heat dissipation pipe 401.
The working process of the utility model is as follows:
s1, transferring heat generated by the generator body 201 from the generator body 201 to the radiating pipe 401, transferring the heat from the radiating pipe 401 to the radiating fins 404, and radiating the heat by the radiating fins;
s2, meanwhile, the ventilation opening 103 ensures the circulation of air inside and outside the heat dissipation box 1, so that heat cannot be accumulated in the heat dissipation box 1 for a long time, the number of the heat dissipation fins 404 is multiple, the heat dissipation fins are uniformly distributed on the heat dissipation pipe 401, the contact area of the generator body and the air is increased, and the heat dissipation effect is improved;
s3, when the temperature inside the heat dissipation box 1 is high, the fan 3 is started to rotate forward, air enters the box body 101 from the ventilation opening 103, heat is taken away and then is discharged from the fan 3, and the effect of auxiliary heat dissipation is achieved;
s4, when the first filter screen 104 is rich in attached impurities and needs to be cleaned, the fan 3 is started to rotate reversely, air enters the box body 101 from the fan 3 and is discharged from the vent 103, and the impurities attached to the first filter screen 104 are taken away when the air is discharged;
s5, through setting the second filter screen 106, the second filter screen 106 is located on one side, far away from the fan 5, of the mounting groove 105, when the fan 3 rotates reversely, the second filter screen 106 blocks impurities in the air, damage to the generator body 201 or the fan 3 caused by the impurities entering the box body 101 is avoided, when the fan 3 rotates forwardly, the impurities attached to the second filter screen 106 can be taken away, the self-cleaning purpose is achieved, manual cleaning is not needed, and manpower is saved.
To sum up, when a user uses the heat dissipation device 4, the heat dissipation device 4 includes a heat dissipation tube 401, two ends of the heat dissipation tube 401 are fixedly connected with a connection block 402, one side of the connection block 402 is provided with a through hole 403, an outer surface of the heat dissipation tube 401 is fixedly connected with a heat dissipation fin 404, two sides of the generator body 201 are provided with screw holes corresponding to the through hole 403, the connection block 402 is fixedly installed at two sides of the generator body 201 through the through hole 403 and the screw holes by using bolts, the heat dissipation tube 401 is lapped on the outer surface of the generator body 201, heat generated by the generator body 201 is transmitted to the heat dissipation tube 401 and then transmitted to the heat dissipation fin 404 by the heat dissipation fin 401, and the heat is dissipated by the heat dissipation fin, meanwhile, the arrangement of the ventilation opening 103 ensures the circulation of air inside and outside the heat dissipation box 1, so that the heat is not accumulated in the heat dissipation box 1 for a long time, the number of the radiating fins 404 is multiple, and the radiating fins are uniformly distributed on the radiating pipe 401, so that the contact area of the generator body and air is increased, and the radiating effect is improved; by arranging the fan 3, when the temperature in the heat dissipation box 1 is higher, the fan 3 is started to rotate forwards, air enters the box body 101 from the ventilation opening 103, heat is taken away and then is discharged from the fan 3, and an auxiliary heat dissipation effect is achieved, by arranging the first filter screen 104, when the air passes through the ventilation opening 103, the first filter screen 104 blocks impurities in the air, the impurities are prevented from entering the box body 101 to damage the generator body 201 or the fan 3, when the impurities attached to the first filter screen 104 are more and need to be cleaned, the fan 3 is started to rotate backwards, the air enters the box body 101 from the fan 3 and is discharged from the ventilation opening 103, the impurities attached to the first filter screen 104 are taken away when the air is discharged, by arranging the second filter screen 106, the second filter screen 106 is positioned on one side of the mounting groove 105 far away from the fan 5, and when the fan 3 rotates backwards, the second filter screen 106 blocks the impurities in the air, avoid impurity to cause the harm to generator body 201 or fan 3 in getting into box 101, when fan 3 corotation, can take away adnexed impurity on the second filter screen 106, reach self-cleaning purpose, do not need the manual work to go to clean, use manpower sparingly.
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 utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a aerogenerator is with heat dissipation mechanism which characterized in that: including heat dissipation case (1), aerogenerator (2), fan (3), heat abstractor (4) and case lid (5), the inside fixed mounting of heat dissipation case (1) has aerogenerator (2), the inside one side fixed mounting of heat dissipation case (1) has fan (3), the top fixed mounting of aerogenerator (2) has heat abstractor (4), the top fixed mounting of heat dissipation case (1) has case lid (5).
2. The heat dissipation mechanism for a wind power generator as claimed in claim 1, wherein: heat dissipation case (1) includes box (101), installation screw (102), vent (103), first filter screen (104), mounting groove (105) and second filter screen (106), installation screw (102) have been seted up to the inside bottom of box (101), vent (103) have all been seted up to the both sides of box (101), the inside of vent (103) is provided with first filter screen (104), mounting groove (105) have been seted up to one side of box (101), one side of mounting groove (105) is provided with second filter screen (106).
3. The heat dissipation mechanism for a wind power generator as claimed in claim 1, wherein: the wind driven generator (2) comprises a generator body (201) and a fan (202), wherein the fan (202) is fixedly connected to the input end of the generator body (201).
4. The heat dissipation mechanism for a wind power generator as claimed in claim 3, wherein: the heat dissipation device (4) comprises a heat dissipation pipe (401), a connecting block (402), a through hole (403) and heat dissipation fins (404), wherein the connecting block (402) is fixedly connected to the two ends of the heat dissipation pipe (401), the through hole (403) is formed in one side of the connecting block (402), and the heat dissipation fins (404) are fixedly connected to the outer surface of the heat dissipation pipe (401).
5. The heat dissipation mechanism for a wind power generator as claimed in claim 3, wherein: the generator body (201) is fixedly installed inside the box body (101) through bolts, a hole is formed in one side, away from the installation groove (105), of the box body (101), and the input end of the generator body (201) is rotatably connected with the box body (101) through the hole.
6. The heat dissipation mechanism for a wind turbine according to claim 4, wherein: the both sides of generator body (201) all seted up the screw with the corresponding position of through-hole (403), connecting block (402) use bolt fixed mounting in the both sides of generator body (201) through-hole (403) and screw, cooling tube (401) overlap joint is in the surface of generator body (201).
7. The heat dissipation mechanism for a wind turbine according to claim 4, wherein: the material of cooling tube (401) is copper, the material of fin (404) is the aluminum alloy.
8. The heat dissipation mechanism for a wind power generator as claimed in claim 2, wherein: the fan (3) is fixedly arranged on one side of the box body (101) through a mounting groove (105).
9. The heat dissipation mechanism for a wind power generator as claimed in claim 2, wherein: the top of the box body (101) is provided with a screw hole, the top of the box cover (5) is provided with a hole, and the box cover (5) is fixedly arranged at the top of the box body (101) through the hole and the screw hole by using a bolt.
10. The heat dissipation mechanism for a wind power generator as claimed in claim 4, wherein: the number of the radiating fins (404) is multiple, and the radiating fins are uniformly distributed on the outer surface of the radiating pipe (401).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202121919647.6U CN216665834U (en) | 2021-08-17 | 2021-08-17 | Heat dissipation mechanism for wind driven generator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202121919647.6U CN216665834U (en) | 2021-08-17 | 2021-08-17 | Heat dissipation mechanism for wind driven generator |
Publications (1)
Publication Number | Publication Date |
---|---|
CN216665834U true CN216665834U (en) | 2022-06-03 |
Family
ID=81757543
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202121919647.6U Active CN216665834U (en) | 2021-08-17 | 2021-08-17 | Heat dissipation mechanism for wind driven generator |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN216665834U (en) |
-
2021
- 2021-08-17 CN CN202121919647.6U patent/CN216665834U/en active Active
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN216665834U (en) | Heat dissipation mechanism for wind driven generator | |
CN213419273U (en) | Cooling and heat dissipating device for wind generating set | |
CN216044206U (en) | Novel cooling device for wind driven generator | |
CN216565059U (en) | Ventilation heat dissipation energy storage solar photovoltaic board | |
CN214170735U (en) | Wind power generation tower cylinder structure with good heat dissipation effect | |
CN213521466U (en) | Fan housing for motor | |
CN209908674U (en) | Cooling structure of wind generating set | |
CN212360054U (en) | Heat dissipation device of wind generating set | |
CN218733588U (en) | Wind-powered electricity generation new forms of energy motor heat abstractor | |
CN216289780U (en) | Heat dissipation device for electric power engineering equipment | |
CN219305287U (en) | High-efficiency radiator of solar inverter | |
CN218953436U (en) | Generating set sound insulation protector | |
CN218997511U (en) | Data center computer lab power supply unit | |
CN219281873U (en) | Wind power generation set | |
CN217642969U (en) | Cooling device for wind driven generator | |
CN216842070U (en) | Air cooling device of wind driven generator | |
CN213043588U (en) | Intelligence frequency conversion integration control module heat radiation structure | |
CN220319736U (en) | Wind power generation device with heat dissipation mechanism | |
CN209875391U (en) | Novel heat dissipation device for wind driven generator switch | |
CN220955935U (en) | Engine body cooling device for wind power generation | |
CN217300785U (en) | Cooling device for wind driven generator | |
CN220227231U (en) | Heat radiation structure and wind generating set heat abstractor | |
CN214755083U (en) | Transformer substation with cooling and dust removing functions | |
CN221041388U (en) | Solar cell module convenient to overhaul and install | |
CN218237276U (en) | Wind-solar complementary street lamp |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant |