CN212003239U - Underground ventilation device with cooling function - Google Patents

Underground ventilation device with cooling function Download PDF

Info

Publication number
CN212003239U
CN212003239U CN202020534406.9U CN202020534406U CN212003239U CN 212003239 U CN212003239 U CN 212003239U CN 202020534406 U CN202020534406 U CN 202020534406U CN 212003239 U CN212003239 U CN 212003239U
Authority
CN
China
Prior art keywords
box
pipe
block
inner cavity
box body
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.)
Expired - Fee Related
Application number
CN202020534406.9U
Other languages
Chinese (zh)
Inventor
秦江涛
陈婧
何荣军
詹玲玲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Vocational Institute of Engineering
Original Assignee
Chongqing Vocational Institute of Engineering
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Chongqing Vocational Institute of Engineering filed Critical Chongqing Vocational Institute of Engineering
Priority to CN202020534406.9U priority Critical patent/CN212003239U/en
Application granted granted Critical
Publication of CN212003239U publication Critical patent/CN212003239U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

The utility model relates to a downhole ventilation device with cooling function, which comprises a box body, wherein the top of the left side of the box body is communicated with an air inlet pipe, the right end of the air inlet pipe penetrates through the box body and is communicated with an L-shaped pipe extending to the inner cavity of the box body, and a filter box is fixedly arranged on the left side of the top of the inner cavity of the box body; the utility model discloses a box, the intake pipe, L type pipe, filter cartridge, the plate body, the connecting pipe, the refrigeration box, the fan, the blast pipe, the fixed block, a supporting plate, the block, the body, the setting of scattered gas fan and protection network, the purpose that possesses the cooling function has been reached, current ventilation unit in the pit has been solved, only carry out simple circulation ventilation to the air circumstance in the pit, but dry sultry in the pit in summer, the environment is very abominable, simple circulation ventilation can not satisfy the operating requirement in the pit, the ventilation system that needs to have the cooling function simultaneously carries out the problem of improving to the environment in the pit.

Description

Underground ventilation device with cooling function
Technical Field
The utility model relates to a ventilation technical field in the pit specifically is a ventilation unit in pit with cooling function.
Background
In the energy structure of China, coal occupies a particularly important position as basic energy, accounts for 73.4 percent of total energy consumption, and is an important guarantee for sustainable development of the national industry, a mine ventilation system is an important component of a mine production system, the coal industry is continuously developed along with the increase of the demand for coal, the mine production capacity is higher and higher, the occurrence rate of safety accidents in coal mine production is high, large-scale and extra-large-scale disasters are continuously generated, great loss and threat are brought to the life safety of coal mine workers, the causes of occurrence and expansion of serious disasters of coal mines in recent years in China are not closely related to the mine ventilation system.
The existing underground ventilation device only performs simple circulating ventilation on an underground air environment, but the underground air environment is dry and stuffy in summer, the environment is quite severe, the simple circulating ventilation cannot meet the underground working requirement, and a ventilation system with a cooling function is required to improve the underground environment.
SUMMERY OF THE UTILITY MODEL
To the above problems, the utility model provides a ventilation unit in pit with cooling function, possesses the advantage of cooling function, has solved current ventilation unit in pit, only carries out simple circulation ventilation to the air circumstance in the pit, but summer is dry sultry in the pit, and the environment is very abominable, and simple circulation ventilation can not satisfy the job requirement in the pit, needs the ventilation system who has the cooling function to carry out the problem of improving to the environment in the pit.
The utility model provides a technical problem's technical scheme does:
a downhole ventilation device with a cooling function comprises a box body, wherein the top of the left side of the box body is communicated with an air inlet pipe, the right end of the air inlet pipe penetrates through the box body and extends to the inner cavity of the box body to be communicated with an L-shaped pipe, the left side of the top of the inner cavity of the box body is fixedly provided with a filter box, the bottom of the filter box is fixedly provided with a plate body, two sides of the plate body are fixedly arranged with the inner cavity of the box body, one end, away from the air inlet pipe, of the L-shaped pipe penetrates through the filter box and extends to the lower part of the inner cavity of the filter box, the right side of the filter box is communicated with a connecting pipe, the right side of the connecting pipe is communicated with a refrigeration box, the top of the refrigeration box is fixedly arranged with the top of the inner cavity of the box body, the right side of the refrigeration box is communicated with a fan, the inner chamber of box and the below fixed mounting that is located the plate body have the backup pad, the center department fixed mounting at backup pad top has the block, the inner chamber bearing of block supports there is the body, the bottom of body runs through block and backup pad in proper order and extends to the bottom intercommunication of backup pad has the gas fan that looses, the one end that the fan was kept away from to the blast pipe runs through fixed block and block in proper order and extends to the inner chamber of block, the bottom fixed mounting of box has the protection network.
Further, the bottom fixed mounting of refrigeration box inner chamber has the semiconductor refrigeration board, the right side intercommunication at refrigeration box top has first water injection pipe, the outside threaded connection that the top of first water injection pipe runs through the box and extends to the box has the tube cap, the inner chamber fixed mounting of refrigeration box has the return bend, the both ends of return bend all run through the refrigeration box and extend to the outside of refrigeration box respectively with the right-hand member of connecting pipe and the inlet end intercommunication of fan.
Further, the left side fixed mounting of box inner chamber has the motor, the output shaft fixed mounting of motor has the bull stick, the right side of bull stick and the left side bearing support of fixed block, the driving gear has been cup jointed on the surface of bull stick, the outside fixed mounting that the block and extend to the block is run through at the top of body has driven gear, the driving gear meshes with driven gear.
Further, the inner cavity of the air inlet pipe is fixedly provided with a filter screen, and the surface of the air inlet pipe is provided with external threads.
Further, the top intercommunication of filter cartridge has the second water injection pipe, the outside threaded connection that the top of second water injection pipe runs through the box and extends to the box has the apron.
Further, the surface of body and the inner chamber that is located the block are seted up there is the gas pocket, the sealing washer has all been cup jointed to the top and the bottom that the body surface just is located the block inner chamber, and the surface of sealing washer and the inner wall laminating of block.
Furthermore, the air-dispersing fan is arranged in a hollow mode, and air-dispersing holes are regularly formed in the bottom of the air-dispersing fan at equal intervals.
The effects provided in the contents of the present invention are only the effects of the embodiments, not all the effects of the present invention, and one of the above technical solutions has the following advantages or advantageous effects:
1. the utility model discloses a box, the intake pipe, L type pipe, filter cartridge, the plate body, the connecting pipe, the refrigeration box, the fan, the blast pipe, the fixed block, a supporting plate, the block, the body, the setting of scattered gas fan and protection network, the purpose that possesses the cooling function has been reached, current ventilation unit in the pit has been solved, only carry out simple circulation ventilation to the air circumstance in the pit, but dry sultry in the pit in summer, the environment is very abominable, simple circulation ventilation can not satisfy the operating requirement in the pit, the ventilation system that needs to have the cooling function simultaneously carries out the problem of improving to the environment in the pit.
2. The utility model discloses a refrigeration box, the semiconductor refrigeration board, first water injection pipe, the return bend, the setting of connecting pipe and fan, the user injects the coolant liquid to the inner chamber of refrigeration box through first water injection pipe, the semiconductor refrigeration board refrigerates the coolant liquid, the work of fan makes outside air admission return bend, the coolant liquid after the cooling is to the air refrigeration in the return bend, the purpose of cooling air has been reached, through the motor, the bull stick, driving gear and driven gear's setting, the work of motor drives the bull stick and rotates, the rotation of bull stick drives the driving gear and rotates, driven gear follows the driving gear and rotates, reached and provide the purpose of power for the scattered gas fan, setting through the intake pipe, outside air gets into and filters at the inner chamber of intake pipe before the box inner chamber, reached and carried out filterable mesh to the air.
3. The utility model discloses a setting of second water injection pipe, the user can be as required to the inside water injection of filter cartridge, the purpose that makes things convenient for the water injection has been reached, setting through body surface gas pocket, make air conditioning can carry to the inner chamber of body, setting through the block, gaseous inner chamber that gets into the block after the cooling, under the effect of sealing washer, can only flow in to the inner chamber of body, reached and prevented that air conditioning from causing extravagant purpose to other position losses, through the setting of gas fan that looses, air conditioning is exported to the external world through the gas fan that looses, the purpose of even output air conditioning has been reached.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a partial front sectional view of the refrigeration cassette of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 1;
FIG. 4 is a partial bottom view of the air-dispersing fan of the present invention;
FIG. 5 is a partial front view of the intake tube of the present invention;
in the figure: 1. a box body; 2. an air inlet pipe; 3. an L-shaped pipe; 4. a filter cartridge; 5. a plate body; 6. a connecting pipe; 7. a refrigeration cassette; 8. a fan; 9. an exhaust pipe; 10. a fixed block; 11. a support plate; 12. a block body; 13. a pipe body; 14. a ventilation fan; 15. a protective net; 16. a semiconductor refrigeration plate; 17. a first water injection pipe; 18. bending the pipe; 19. a motor; 20. a rotating rod; 21. a driving gear; 22. a driven gear; 23. a second water injection pipe.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present invention is explained in detail by the following embodiments with reference to the attached drawings 1 to 5. The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted so as to not unnecessarily limit the invention.
Referring to fig. 1-5, a downhole ventilation device with a cooling function comprises a box body 1, an air inlet pipe 2 is communicated with the top of the left side of the box body 1, the right end of the air inlet pipe 2 penetrates through the box body 1 and extends to the inner cavity of the box body 1 to be communicated with an L-shaped pipe 3, a filter box 4 is fixedly installed on the left side of the top of the inner cavity of the box body 1, a plate body 5 is fixedly installed at the bottom of the filter box 4, two sides of the plate body 5 are fixedly installed with the inner cavity of the box body 1, one end, far away from the air inlet pipe 2, of the L-shaped pipe 3 penetrates through the filter box 4 and extends to the lower part of the inner cavity of the filter box 4, a connecting pipe 6 is communicated with the right side of the filter box 4, a refrigeration box 7 is communicated with the right side of the connecting pipe 6, the top of the refrigeration box 7 is fixedly installed with the top of the inner, a fixed block 10 is fixedly arranged on the right side of an inner cavity of a box body 1, a supporting plate 11 is fixedly arranged in the inner cavity of the box body 1 and below a plate body 5, a block body 12 is fixedly arranged at the center of the top of the supporting plate 11, a tube body 13 is supported by an inner cavity bearing of the block body 12, the bottom of the tube body 13 sequentially penetrates through the block body 12 and the supporting plate 11 and extends to the bottom of the supporting plate 11 to be communicated with an air dissipation fan 14, one end, far away from a fan 8, of an exhaust pipe 9 sequentially penetrates through the fixed block body 10 and the block body 12 and extends to the inner cavity of the block body 12, a protective net 15 is fixedly arranged at the bottom of the box body 1, and the plate body 5, a connecting pipe 6, a refrigeration box 7, the fan 8, the exhaust pipe 9, the fixed block body 10, the supporting plate 11, the block body 12, the tube body 13, the air, the method has the advantages that simple circulating ventilation is only carried out on the underground air environment, but the underground is dry and stuffy in summer, the environment is quite severe, the simple circulating ventilation cannot meet the underground working requirement, and the ventilation system with the cooling function is required to improve the underground environment.
In the embodiment, specifically, a semiconductor refrigeration plate 16 is fixedly installed at the bottom of an inner cavity of the refrigeration box 7, a first water injection pipe 17 is communicated with the right side of the top of the refrigeration box 7, the top of the first water injection pipe 17 penetrates through the box body 1 and extends to the outside of the box body 1, a pipe cover is connected with the external threads, an elbow 18 is fixedly installed in the inner cavity of the refrigeration box 7, two ends of the elbow 18 penetrate through the refrigeration box 7 and extend to the outside of the refrigeration box 7 to be respectively communicated with the right end of the connecting pipe 6 and the air inlet end of the fan 8, through the arrangement of the refrigeration box 7, the semiconductor refrigeration plate 16, the first water injection pipe 17, the elbow 18, the connecting pipe 6 and the fan 8, a user injects cooling liquid into the inner cavity of the refrigeration box 7 through the first water injection pipe 17, the semiconductor refrigeration plate 16 refrigerates the cooling liquid, the external air enters the elbow 18 through the operation of the, the purpose of cooling the air is achieved.
In this embodiment, it is concrete, the left side fixed mounting of 1 inner chamber of box has motor 19, motor 19's output shaft fixed mounting has bull stick 20, bull stick 20's right side and the left side bearing support of fixed block 10, driving gear 21 has been cup jointed on bull stick 20's surface, the top of body 13 runs through block 12 and extends to the outside fixed mounting of block 12 has driven gear 22, driving gear 21 and driven gear 22 mesh, through motor 19, bull stick 20, driving gear 21 and driven gear 22's setting, motor 19's work drives bull stick 20 and rotates, bull stick 20's rotation drives driving gear 21 and rotates, driven gear 22 follows driving gear 21 and rotates, reached the mesh for the fan 14 that looses provides power.
In this embodiment, it is specific, the inner chamber fixed mounting of intake pipe 2 has the filter screen, and the surface of intake pipe 2 is provided with the external screw thread, and through the setting of intake pipe 2, outside air filter at intake pipe 2's inner chamber before getting into 1 inner chamber of box, has reached and has carried out filterable purpose to the air.
In this embodiment, it is specific, the top intercommunication of filter cartridge 4 has second water injection pipe 23, and the outside threaded connection that the top of second water injection pipe 23 runs through box 1 and extends to box 1 has the apron, and through the setting of second water injection pipe 23, the user can reach the purpose that makes things convenient for the water injection to the inside water injection of filter cartridge 4 as required.
In this embodiment, it is concrete, the gas pocket has been seted up to the surface of body 13 and the inner chamber that is located block 12, the sealing washer has all been cup jointed to the top and the bottom that body 13 surface just is located the inner chamber of block 12, and the surface of sealing washer and the inner wall laminating of block 12, setting through body 13 surface gas pocket, make air conditioning can carry to the inner chamber of body 13, setting through block 12, the gas after the cooling gets into the inner chamber of block 12, under the effect of sealing washer, can only flow into to the inner chamber of body 13, reached and prevented that air conditioning from causing extravagant purpose to other position losses.
In this embodiment, specifically, the air-dispersing fan 14 is a hollow structure, the air-dispersing holes are regularly formed at equal intervals at the bottom of the air-dispersing fan 14, and the cool air is output to the outside through the air-dispersing fan 14 by the arrangement of the air-dispersing fan 14, so as to achieve the purpose of uniformly outputting the cool air.
The specific working process is as follows: the device is arranged at the top of a mine and is communicated with an air inlet pipe 2 through an external pipeline, so that external gas can be conveyed into the air inlet pipe 2, a user opens a motor 19 and a fan 8, the air in the inner cavity of a refrigerating box 7 is pumped out by the work of the fan 8, the low air pressure in the inner cavity of the refrigerating box 7 enables the air in a filtering box 4 to be output to the refrigerating box 7, the air pressure in the inner cavity of the filtering box 4 after the air is pumped is lower, so that the external air is conveyed to the inner cavity of the air inlet pipe 2 under the influence of the air pressure, the air passes through the air inlet pipe 2 and is primarily filtered through a filter screen, the filtered air enters disinfectant water in the filtering box 4 through an L-shaped pipe 3 and is disinfected through the disinfectant water, then the air enters the inner cavity of an elbow pipe 18 through a connecting pipe 6, a semiconductor refrigerating plate 16 in the inner cavity of the refrigerating box 7 refrigerates, the air after the refrigeration passes through fan 8 and gets into blast pipe 9, the air conditioning in blast pipe 9 gets into the inner chamber of block 12, the air conditioning of the inner chamber of block 12 passes through the gas pocket entering body 13 on body 13 surface, thereby continue to get into the inner chamber of air dissipation fan 14, motor 19's output shaft drives driving gear 21 and rotates, driving gear 21 drives driven gear 22's rotation, driven gear 22's rotation drives body 13 and rotates, the rotation of body 13 drives air dissipation fan 14 and rotates, thereby evenly to external output the air conditioning of air dissipation fan 14 inner chamber.
Although the above description has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and on the basis of the technical solution of the present invention, various modifications or variations that can be made by those skilled in the art without creative efforts are still within the scope of the present invention.

Claims (7)

1. The underground ventilation device with the cooling function comprises a box body (1) and is characterized in that the top of the left side of the box body (1) is communicated with an air inlet pipe (2), the right end of the air inlet pipe (2) penetrates through the box body (1) and extends to an inner cavity of the box body (1) to be communicated with an L-shaped pipe (3), a filter box (4) is fixedly installed on the left side of the top of the inner cavity of the box body (1), a plate body (5) is fixedly installed at the bottom of the filter box (4), two sides of the plate body (5) are fixedly installed with the inner cavity of the box body (1), one end, far away from the air inlet pipe (2), of the L-shaped pipe (3) penetrates through the filter box (4) and extends to the lower portion of the inner cavity of the filter box (4), a connecting pipe (6) is communicated with the right side of the filter box (4), a refrigeration box (7) is communicated with the right side of the connecting pipe, the right side intercommunication of refrigeration box (7) has fan (8), the top of fan (8) and the right side fixed mounting at box (1) inner chamber top, the exhaust end intercommunication of fan (8) has blast pipe (9), the right side fixed mounting of box (1) inner chamber has fixed block (10), the below fixed mounting that the inner chamber of box (1) just is located plate body (5) has backup pad (11), the center department fixed mounting at backup pad (11) top has block (12), the inner chamber bearing of block (12) supports has body (13), the bottom of body (13) runs through block (12) and backup pad (11) in proper order and extends to the bottom intercommunication of backup pad (11) has scattered gas fan (14), the one end that fan (8) was kept away from in blast pipe (9) runs through fixed block (10) and block (12) in proper order and extends to the inner chamber of block (12), and a protective net (15) is fixedly arranged at the bottom of the box body (1).
2. The downhole ventilation device with the cooling function according to claim 1, wherein a semiconductor refrigerating plate (16) is fixedly mounted at the bottom of the inner cavity of the refrigerating box (7), a first water injection pipe (17) is communicated with the right side of the top of the refrigerating box (7), the top of the first water injection pipe (17) penetrates through the box body (1) and extends to the outer threaded connection of the box body (1) to form a pipe cover, an elbow pipe (18) is fixedly mounted in the inner cavity of the refrigerating box (7), and two ends of the elbow pipe (18) penetrate through the refrigerating box (7) and extend to the outer portion of the refrigerating box (7) to be communicated with the right end of the connecting pipe (6) and the air inlet end of the fan (8) respectively.
3. The downhole ventilation device with the cooling function as claimed in claim 1, wherein a motor (19) is fixedly mounted on the left side of the inner cavity of the box body (1), a rotating rod (20) is fixedly mounted on an output shaft of the motor (19), the right side of the rotating rod (20) is supported by a left bearing of the fixed block (10), a driving gear (21) is sleeved on the surface of the rotating rod (20), a driven gear (22) is fixedly mounted on the outer portion of the block (12) and penetrates through the block (12) at the top of the pipe body (13), and the driving gear (21) is meshed with the driven gear (22).
4. The downhole ventilation device with the cooling function as claimed in claim 1, wherein a filter screen is fixedly installed in the inner cavity of the air inlet pipe (2), and an external thread is arranged on the surface of the air inlet pipe (2).
5. A downhole ventilation device with a cooling function according to claim 1, wherein the top of the filter box (4) is communicated with a second water injection pipe (23), and the top of the second water injection pipe (23) penetrates through the box body (1) and extends to the external thread of the box body (1) to be connected with a cover plate.
6. The downhole ventilation device with the cooling function as claimed in claim 1, wherein the surface of the pipe body (13) and the inner cavity of the block body (12) are provided with air holes, the top and the bottom of the surface of the pipe body (13) and the inner cavity of the block body (12) are respectively sleeved with a sealing ring, and the surface of the sealing ring is attached to the inner wall of the block body (12).
7. The downhole ventilation device with the cooling function as claimed in claim 1, wherein the air-dispersing fan (14) is hollow, and air-dispersing holes are regularly formed at the bottom of the air-dispersing fan (14) at equal intervals.
CN202020534406.9U 2020-04-13 2020-04-13 Underground ventilation device with cooling function Expired - Fee Related CN212003239U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020534406.9U CN212003239U (en) 2020-04-13 2020-04-13 Underground ventilation device with cooling function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020534406.9U CN212003239U (en) 2020-04-13 2020-04-13 Underground ventilation device with cooling function

Publications (1)

Publication Number Publication Date
CN212003239U true CN212003239U (en) 2020-11-24

Family

ID=73413691

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020534406.9U Expired - Fee Related CN212003239U (en) 2020-04-13 2020-04-13 Underground ventilation device with cooling function

Country Status (1)

Country Link
CN (1) CN212003239U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112832845A (en) * 2021-01-11 2021-05-25 重庆工程职业技术学院 Coal mine coal face upper corner gas extraction device and extraction method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112832845A (en) * 2021-01-11 2021-05-25 重庆工程职业技术学院 Coal mine coal face upper corner gas extraction device and extraction method thereof
CN112832845B (en) * 2021-01-11 2022-09-02 重庆工程职业技术学院 Gas extraction device and method for upper corner of coal mining working face of coal mine

Similar Documents

Publication Publication Date Title
CN111637087B (en) Cooling device for numerical control fan
CN205977713U (en) Novel canned motor pump structure for air conditioning unit
CN212003239U (en) Underground ventilation device with cooling function
CN103174641A (en) Integrated fully-sealed type refrigeration gear pump
CN214887188U (en) Intelligent mining coal mine dust removal heat sink
CN210599403U (en) Screw air compressor for water-based paint production
CN115748892A (en) Circulating water control device for water supply pump station
CN215529667U (en) Cooling base for communication equipment
CN211513985U (en) Honeycomb active carbon adsorption device
CN212838339U (en) Movable motor-driven two-stage compression oil injection screw air compressor
CN204402911U (en) The self-priming multistage centrifugal pump of split
CN209317923U (en) A kind of flotation device transmission device
CN113700662A (en) Noise-reduction environment-friendly centrifugal fan
CN221076651U (en) Air energy refrigeration and heating two-in-one supply system integrated hydraulic module convenient to install
CN207715388U (en) A kind of Portable chemical production submerged centrifugal pump
CN216741590U (en) Novel mine ventilation device
CN220302356U (en) Energy-saving centrifugal fan
CN108940607A (en) A kind of flotation device transmission device
CN219242020U (en) Exhaust treatment device of explosion-proof rubber-tyred vehicle
CN219170318U (en) Heat radiation structure of numerical control machine
CN220043215U (en) Frequency converter for coal mine fan
CN216812225U (en) Medium-pressure backward-tilting centrifugal fan
CN216381954U (en) Lubricating structure for detecting steam-electricity dual-drive induced draught fan
CN213928794U (en) Improved energy-saving high-efficiency centrifugal fan
CN207797276U (en) A kind of mobile type cold blast engine with anion generator

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20201124

Termination date: 20210413