CN209866724U - Solar photo-thermal power generation reflector cleaning system - Google Patents
Solar photo-thermal power generation reflector cleaning system Download PDFInfo
- Publication number
- CN209866724U CN209866724U CN201822220571.2U CN201822220571U CN209866724U CN 209866724 U CN209866724 U CN 209866724U CN 201822220571 U CN201822220571 U CN 201822220571U CN 209866724 U CN209866724 U CN 209866724U
- Authority
- CN
- China
- Prior art keywords
- cleaning
- cleaning device
- mirror surface
- reflector
- main 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
Links
Landscapes
- Cleaning In General (AREA)
Abstract
The utility model relates to a clean system of solar photothermal power speculum belongs to the solar photothermal power field. The system comprises a supporting device, a transmission device, a control device and a cleaning device; the supporting device is arranged on the mirror surface of the reflector; the transmission device is connected with the cleaning device and used for driving the cleaning device; the control device is connected with the transmission device and is used for sending different driving instructions to the transmission device; the cleaning device is in contact with the reflecting mirror surface, slides on the reflecting mirror surface under the driving of the transmission device, and cleans the reflecting mirror surface. The system is directly arranged on the reflecting mirror, and the cleaning device is driven by the transmission device to move on the mirror surface to clean the mirror surface, so that the device has a simple structure and low operation cost; meanwhile, the cleaning device adopts two cleaning brushes and the dust absorption module to clean the mirror surface, so that the cleaning efficiency is high, and the water is saved.
Description
Technical Field
The utility model relates to a solar photothermal power field especially relates to a solar photothermal power speculum cleaning device.
Background
With the increasing shortage of energy sources such as petroleum, natural gas, coal and the like, solar energy is paid attention again, and solar power generation is an important mode for utilizing solar energy. At present, solar power generation mainly comprises photovoltaic power generation and photo-thermal power generation, and breakthrough of photo-thermal power generation on the technical level and high power generation efficiency thereof lead the development of the photo-thermal power generation to be rapid.
At present, solar photo-thermal power generation technologies mainly comprise four solar power generation technologies of tower type, groove type, Fresnel type and butterfly type, wherein the basic process of tower type solar power generation is as follows: the reflector is used for tracking the sun and converging sunlight to the heat absorption device to obtain high-temperature heat energy, and then the heat energy is used for conventional thermal power generation. The tower-type solar photo-thermal power station is generally built in open fields such as desert edges, gobi, plateaus and the like, and tiny particles such as dust and the like are inevitably accumulated on the reflector, so that the reflectivity of the reflector is influenced, and the power generation efficiency is reduced.
At present, the cleaning mode of the reflecting mirror is mainly divided into two modes of manual cleaning and mechanical cleaning. The manual cleaning of the reflector can cause the waste of a large amount of water resources, and the cleaning workload is large and the cleaning efficiency is low. Adopt in the mechanical cleaning to wash the car and wash the speculum is comparatively general mode, and the washing car of specialty is expensive, has increased the operation cost of light and heat power station.
Disclosure of Invention
In view of this, the utility model provides a simple structure, running cost are low, water-saving solar photothermal power speculum cleaning device.
The utility model provides a solar photo-thermal power generation reflector cleaning system, which comprises a supporting device, a transmission device, a control device and a cleaning device; the supporting device is arranged on the mirror surface of the reflector; the number of the transmission devices is at least four, and the transmission devices are all connected with the cleaning device and used for driving the cleaning device; the control device is connected with the transmission device and is used for sending different driving instructions to the transmission device; the cleaning device is in contact with the reflecting mirror surface, slides on the reflecting mirror surface under the driving of the transmission device, and cleans the reflecting mirror surface.
Furthermore, the supporting device comprises four fixed supports arranged at four vertexes of the mirror surface of the reflector; the transmission device comprises four groups of winding rolls and motors which are arranged on the fixed support, and the motors drive the winding rolls to rotate; one end of each cable is connected with the corresponding winding roll, the other end of each cable is connected with the cleaning device, the cables are wound and unwound in the rotating process of the winding rolls, and the cleaning device is pulled to slide on the mirror surface of the reflector so as to clean the mirror surface of the reflector.
Furthermore, the supporting device comprises four fixed supports arranged at four vertexes of the mirror surface of the reflector; the transmission device comprises four pulley mechanisms which are respectively arranged on four fixed brackets; the four groups of winding rolls and the motors are arranged at the center of the back surface of the mirror surface of the reflector, and the motors drive the winding rolls to rotate; one end of each cable is connected with the corresponding winding roll, the other end of each cable is connected with the cleaning device after the direction of the cable is changed around the pulley mechanism, the cables are wound and unwound in the rotating process of the winding rolls, and the cleaning device is pulled to slide on the mirror surface of the reflector to clean the mirror surface of the reflector.
Furthermore, the supporting device comprises four fixed supports arranged at four vertexes of the mirror surface of the reflector; the transmission device comprises four pulley mechanisms which are respectively arranged on four fixed brackets; the four groups of winding rolls and the motors are arranged on the reflecting mirror support, and the motors drive the winding rolls to rotate; one end of each cable is connected with the corresponding winding roll, the other end of each cable is connected with the cleaning device after the direction of the cable is changed around the pulley mechanism, the cables are wound and unwound in the rotating process of the winding rolls, and the cleaning device is pulled to slide on the mirror surface of the reflector to clean the mirror surface of the reflector.
Further, the sliding track of the cleaning device on the mirror surface of the reflector is as follows: and the cleaning device moves back and forth in parallel in an L-shaped track from left to right or from right to left or from top to bottom or from bottom to top until the cleaning device completely scans the mirror surface of the reflecting mirror.
Further, the sliding track of the cleaning device on the mirror surface of the reflector is as follows: from outside to inside, the reciprocating loop makes gradually reduced L-shaped track movement until the cleaning device completely sweeps the mirror surface of the reflector; or from inside to outside, the reciprocating loop makes gradually enlarged L-shaped track movement until the cleaning device completely sweeps the mirror surface of the reflecting mirror.
Furthermore, the cleaning device comprises a cylindrical cleaning device main body, a plurality of outer ring cleaning brushes and a plurality of inner ring cleaning brushes which are arranged along the circumference are arranged in the cylindrical main body, and the outer ring cleaning brushes and the inner ring cleaning brushes are distributed in a staggered manner, so that the cleaning device can clean a passing path without gaps in the moving process; the center of the cylindrical main body is provided with a dust collection module which is used for collecting dust cleaned by the inner and outer cleaning brushes; four hanging rings are symmetrically distributed on the periphery of the cylindrical main body and are respectively connected with four cables, and the cleaning device is dragged to slide on the mirror surface of the reflector.
Furthermore, the cleaning device comprises a cuboid cleaning device main body, wherein a row of cleaning brushes and two dust collection modules which are respectively adjacent to the upper cleaning brush and the lower cleaning brush are respectively arranged at the upper part and the lower part in the main body; four hanging rings are symmetrically distributed on the periphery of the cuboid main body and are respectively connected with four cables, and the cleaning device is dragged to slide on the mirror surface of the reflector.
Compared with the prior art, the utility model provides a beneficial effect that technical scheme brought is:
(1) the utility model adopts a mechanical cleaning mode, the system structure is simple, and the manufacturing cost is low; the mode of pulling the cleaning device to slide and clean the mirror surface by adopting at least four transmission devices has certain automation and good cleaning effect;
(2) the utility model does not need to adopt a high-power source, has low energy consumption, is particularly suitable for long-time operation in the vast desert and plateau areas at the edges of the land, and has low operation cost;
(3) the utility model discloses an anhydrous cleaning device, the water economy resource has avoided water as cleaning medium, is fit for in dry, the dust is many, the water resource deficient areas such as desert, plateau, still can be used to the environment of the below freezing weather of temperature zero.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout the drawings.
FIG. 1 is a simplified structural schematic of a reflector;
fig. 2 is a front view of a mirror cleaning system according to embodiment 1 of the present invention;
fig. 3 is a plan view of a mirror cleaning system according to embodiment 1 of the present invention;
fig. 4 is a schematic structural view of a mirror cleaning system according to embodiment 2 of the present invention;
fig. 5 is a schematic structural view of a mirror cleaning system according to embodiment 3 of the present invention;
FIG. 6 is a schematic diagram of the trajectory of the cleaning device sliding in a parallel "L" shape according to an embodiment of the present invention;
FIG. 7 is a schematic view of the path of the cleaning device sliding in an L-shape in the embodiment of the present invention;
FIG. 8 is a front view of a cylindrical body of a cleaning device according to an embodiment of the present invention;
FIG. 9 is a bottom view of the cleaning device in an embodiment of the present invention, wherein the main body of the cleaning device is a cylinder;
FIG. 10 is a bottom view of a body of a cleaning device in accordance with another embodiment of the present invention, the body being cylindrical;
fig. 11 is a bottom view of the cleaning device in the embodiment of the present invention, the main body of which is a rectangular parallelepiped.
Reference numerals:
1-a mirror surface; 2-mirror support; 3-a reflector base; 4-fixing the bracket; 5-a winding roll; 6, a motor; 7-a cable; 8-a cleaning device; 81-cleaning device body; 82-outer ring cleaning brush; 83-inner ring cleaning brush; 84-a dust suction module; 85-hanging ring; 86-upper cleaning brush; 87-lower cleaning brush; 88-air duct; 9-pulley mechanism.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be further described below with reference to the accompanying drawings.
Tower solar power plants are typically built in areas where solar energy is abundant, and such areas are typically low rainfall and dry in climate.
The reflector in the tower type solar power station consists of three parts: a reflector mirror surface 1, a reflector pillar 2, a reflector base 3, as shown in fig. 1; the reflecting mirror surface 1 and the reflecting mirror support 2 are connected through a rotary mounting mechanism, the angle of the reflecting mirror surface 1 can be adjusted, and the reflecting mirror surface 1 is usually in a flat state after the sun falls.
The embodiment of the utility model provides a solar photothermal power generation reflector cleaning system, which comprises a supporting device, a transmission device, a control device and a cleaning device; the supporting device is arranged on the mirror surface of the reflector; the number of the transmission devices is at least four, and the transmission devices are all connected with the cleaning device and used for driving the cleaning device; the control device is connected with the transmission device and is used for sending different driving instructions to the transmission device; the cleaning device is in contact with the reflecting mirror surface, slides on the reflecting mirror surface under the driving of the transmission device, and cleans the reflecting mirror surface.
Example 1
Referring to fig. 2 and 3, the supporting device in this embodiment 1 is four fixing brackets 4 mounted at four vertices of the mirror surface 1 of the mirror; the transmission device comprises four groups of winding rolls 5 and motors 6 which are arranged on the fixed support 4, and the motors 6 drive the winding rolls 5 to rotate; one end of each of the four cables 7 is connected with the corresponding winding roll 5, the other end of each of the cables 7 is connected with the cleaning device 8, the cables 7 are wound and unwound in the rotating process of the winding rolls 5, and the cleaning device 8 is pulled to slide on the reflector surface 1 to clean the reflector surface 1.
Example 2
In this embodiment, unlike embodiment 1, the four groups of winding rolls 5 and motors 6 are installed at different positions, and the specific structure of the cleaning system is as follows:
as shown in fig. 4, the supporting device is four fixing brackets 4 mounted at four vertexes of the mirror surface 1 of the reflector; the transmission device comprises four pulley mechanisms 9 which are respectively arranged on the four fixed brackets 4; four groups of winding reels 5 and motors 6 are arranged at the center of the back of the reflecting mirror surface 1, and the motors 6 drive the winding reels 5 to rotate; one end of each cable 7 is connected with the corresponding winding roll 5, the cable 7 is wound around the pulley mechanism 9 and is switched, the other end of each cable 7 is connected with the cleaning device 8, the cables 7 are wound and released in the rotating process of the winding rolls 5, and the cleaning device 8 is pulled to slide on the reflector surface 1 to clean the reflector surface 1.
Example 3
Similar to embodiment 2 except that four sets of take-up reels 5 and motors 6 are mounted on the mirror support post 2 as shown in fig. 5; the specific structure of the cleaning system is as follows:
the supporting devices are four fixed brackets 4 which are arranged at four vertexes of the reflecting mirror surface 1; the transmission device comprises four pulley mechanisms 9 which are respectively arranged on the four fixed brackets 4; four groups of winding reels 5 and motors 6 are arranged on the reflector posts 2, and the motors 6 drive the winding reels 5 to rotate; one end of each cable 7 is connected with the corresponding winding roll 5, the cable 7 is wound around the pulley mechanism 9 and is switched, the other end of each cable 7 is connected with the cleaning device 8, the cables 7 are wound and released in the rotating process of the winding rolls 5, and the cleaning device 8 is pulled to slide on the reflector surface 1 to clean the reflector surface 1.
In the above-described embodiment, the control device sends different driving commands to the transmission device, so that the cleaning device 8 can have different sliding tracks on the mirror surface 1. Exemplarily, as shown in fig. 6, the cleaning device 8 starts from the top left corner of the mirror surface 1, in a left-to-right direction or the cleaning device 8 starts from the bottom right corner of the mirror surface 1, in a right-to-left direction or the cleaning device 8 starts from the top left corner of the mirror surface 1, in a top-to-bottom direction or the cleaning device 8 starts from the bottom right corner of the mirror surface 1, in a bottom-to-top direction: the reciprocating parallel movement is carried out in an L-shaped track until the cleaning device 8 completely scans the reflecting mirror surface 1. As shown in fig. 7, the sliding track of the cleaning device 8 on the mirror surface 1 may also be: the cleaning device 8 starts from the upper left corner of the reflecting mirror surface 1, and moves back and forth in an L-shaped track which gradually reduces from outside to inside until the cleaning device 8 completely sweeps across the reflecting mirror surface 1; or the cleaning device 8 starts from the center of the reflecting mirror surface 1, and moves back and forth from inside to outside in a gradually enlarged L-shaped track until the cleaning device 8 completely sweeps across the reflecting mirror surface 1.
Preferably, as shown in fig. 8 and 9, in the above embodiment, the cleaning device 8 includes a cylindrical cleaning device main body 81, and a plurality of outer ring cleaning brushes 82 and a plurality of inner ring cleaning brushes 83 are arranged inside the cylindrical cleaning device main body, and the plurality of outer ring cleaning brushes 82 and the plurality of inner ring cleaning brushes 83 are staggered with each other, so that the cleaning device 8 can clean the passing path without gaps during the moving process; a dust suction module 84 is arranged at the center of the cylindrical cleaning device main body 81 and is used for collecting dust cleaned by the inner and outer cleaning brushes; four hanging rings 85 are symmetrically distributed on the outer circumference of the cylindrical cleaning device main body 81, and are respectively connected with four cables 7 to drag the cleaning device 8 to slide on the reflecting mirror surface 1. Further, as shown in fig. 10, an air duct 88 may be provided on a periphery of the outer ring cleaning brush 82 away from the inner ring cleaning brush 83 for ventilation to remove dust on the mirror surface 1.
In addition, as shown in fig. 11, the cleaning device main body 81 may be a rectangular parallelepiped, and a row of upper cleaning brushes 86, a row of lower cleaning brushes 87, and two dust suction modules 84 adjacent to the upper and lower cleaning brushes are respectively disposed at the upper and lower portions in the rectangular parallelepiped cleaning device main body 81; the upper and lower cleaning brushes clean the dust on the mirror surface, and two dust suction modules 84 adjacent to the upper and lower cleaning brushes collect the dust cleaned by the cleaning brushes; four hanging rings 85 are symmetrically distributed on the periphery of the cuboid cleaning device main body 81 and are respectively connected with the four cables 7, and the cleaning device 8 is dragged to slide on the mirror surface.
In summary, the utility model provides a solar photo-thermal power generation reflector cleaning system, which is directly installed on the reflector surface, and drives a cleaning device to move on the reflector surface through at least four transmission devices to clean the reflector surface, the device has simple structure and low operation cost; meanwhile, the cleaning device adopts two cleaning brushes and the dust absorption module to clean the mirror surface, so that the cleaning efficiency is high, and the water is saved.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (7)
1. A solar photo-thermal power generation reflector cleaning system is characterized by comprising a supporting device, a transmission device, a control device and a cleaning device; the supporting device is arranged on the mirror surface of the reflector; the number of the transmission devices is at least four, and the transmission devices are all connected with the cleaning device and used for driving the cleaning device; the control device is connected with the transmission device and is used for sending different driving instructions to the transmission device; the cleaning device is in contact with the reflecting mirror surface, slides on the reflecting mirror surface under the driving of the transmission device, and cleans the reflecting mirror surface.
2. The solar photothermal power generation mirror cleaning system according to claim 1, wherein said support means comprises four fixing brackets mounted at four vertices of the mirror surface of the mirror;
the transmission device comprises four groups of winding rolls and motors which are arranged on the fixed support, and the motors drive the winding rolls to rotate; one end of each cable is connected with the corresponding winding roll, the other end of each cable is connected with the cleaning device, the cables are wound and unwound in the rotating process of the winding rolls, and the cleaning device is pulled to slide on the mirror surface of the reflector so as to clean the mirror surface of the reflector.
3. The solar photothermal power generation mirror cleaning system according to claim 1, wherein said support means comprises four fixing brackets mounted at four vertices of the mirror surface of the mirror;
the transmission device comprises four pulley mechanisms which are respectively arranged on four fixed brackets; the four groups of winding reels and motors are arranged at the center of the back surface of the reflecting mirror surface or on the reflecting mirror support, and the motors drive the winding reels to rotate; one end of each cable is connected with the corresponding winding roll, the other end of each cable is connected with the cleaning device after the direction of the cable is changed around the pulley mechanism, the cables are wound and unwound in the rotating process of the winding rolls, and the cleaning device is pulled to slide on the mirror surface of the reflector to clean the mirror surface of the reflector.
4. The solar photo-thermal power generation reflector cleaning system according to claim 1, wherein the sliding track of the cleaning device on the reflector surface is as follows: and the cleaning device moves back and forth in parallel in an L-shaped track from left to right or from right to left or from top to bottom or from bottom to top until the cleaning device completely scans the mirror surface of the reflecting mirror.
5. The solar photo-thermal power generation reflector cleaning system according to claim 1, wherein the sliding track of the cleaning device on the reflector surface is as follows: from outside to inside, the reciprocating loop makes gradually reduced L-shaped track movement until the cleaning device completely sweeps the mirror surface of the reflector; or from inside to outside, the reciprocating loop makes gradually enlarged L-shaped track movement until the cleaning device completely sweeps the mirror surface of the reflecting mirror.
6. The solar photothermal power generation reflector cleaning system according to claim 2 or 3, wherein the cleaning device comprises a cleaning device main body, the cleaning device main body is a cylinder, a plurality of outer ring cleaning brushes and a plurality of inner ring cleaning brushes are arranged inside the main body along the circumference, and the plurality of outer ring cleaning brushes and the plurality of inner ring cleaning brushes are distributed in a staggered manner; the center of the main body is provided with a dust collection module which is used for collecting dust cleaned by the inner and outer cleaning brushes; four hanging rings are symmetrically distributed on the periphery of the cylindrical main body and are respectively connected with four cables.
7. The solar photothermal power generation reflecting mirror cleaning system according to claim 2 or 3, wherein the cleaning device comprises a cleaning device main body, the cleaning device main body is a cuboid, a row of cleaning brushes and two dust collection modules adjacent to the upper and lower cleaning brushes are respectively arranged at the upper part and the lower part inside the main body; the upper and lower cleaning brushes clean the dust on the mirror surface, and two dust collection modules which are respectively adjacent to the upper and lower cleaning brushes collect the dust cleaned by the cleaning brushes; four hanging rings are symmetrically distributed on the periphery of the cuboid main body and are respectively connected with four cables.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822220571.2U CN209866724U (en) | 2018-12-27 | 2018-12-27 | Solar photo-thermal power generation reflector cleaning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822220571.2U CN209866724U (en) | 2018-12-27 | 2018-12-27 | Solar photo-thermal power generation reflector cleaning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209866724U true CN209866724U (en) | 2019-12-31 |
Family
ID=68949889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822220571.2U Expired - Fee Related CN209866724U (en) | 2018-12-27 | 2018-12-27 | Solar photo-thermal power generation reflector cleaning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209866724U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109865688A (en) * | 2018-12-27 | 2019-06-11 | 首航国翼（武汉）科技有限公司 | A kind of solar light-heat power-generation reflecting mirror cleaning systems |
-
2018
- 2018-12-27 CN CN201822220571.2U patent/CN209866724U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109865688A (en) * | 2018-12-27 | 2019-06-11 | 首航国翼（武汉）科技有限公司 | A kind of solar light-heat power-generation reflecting mirror cleaning systems |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110061681B (en) | Desert photovoltaic power station system | |
| CN204349898U (en) | Photovoltaic array component cleans dust pelletizing system automatically | |
| CN204799590U (en) | Photovoltaic cleans machine people | |
| CN110227671A (en) | A kind of photo-thermal heliostat minute surface cleaning device | |
| KR101187185B1 (en) | Automatic dust cleaning system for solar photovoltaic panels | |
| KR20140044157A (en) | Cleaning system of solar power receiver | |
| CN110048667A (en) | A kind of dust-extraction unit that automatically tracks and remove the snow for photovoltaic power generation plate | |
| CN209866724U (en) | Solar photo-thermal power generation reflector cleaning system | |
| CN210647411U (en) | Mirror surface cleaning device for photo-thermal heliostat | |
| CN105790698A (en) | Photovoltaic module based on dust removal mechanism | |
| CN207638610U (en) | A kind of photovoltaic panel accommodating mechanism | |
| KR101087553B1 (en) | Solar Energy Module Having Non-Power Waste Remover, and Sun Location Tracking Apparatus of Solar Heat or Photovoltaic Collectors Having The Same | |
| US9643219B2 (en) | Cleaning device for reflective surface of disc light-condenser | |
| CN107824501A (en) | Intelligent optical ensuring system for heliostat | |
| CN104190667A (en) | Slot-type condenser mirror in-place cleaning equipment | |
| CN207180067U (en) | A kind of groove type solar concentrator | |
| KR101383788B1 (en) | Photovoltaic Generation Device comprising Cleaning device | |
| CN211791425U (en) | Automatically cleaning cooling type photovoltaic power generation device | |
| CN109617519A (en) | A kind of solar panel cleaning machinery arm | |
| CN207952055U (en) | A kind of heliostat intelligent optical guarantee system | |
| CN109865688A (en) | A kind of solar light-heat power-generation reflecting mirror cleaning systems | |
| CN212115219U (en) | Solar panel mounting bracket for green building | |
| CN212935844U (en) | Dustproof photovoltaic power generation board | |
| CN113992140A (en) | Cleaning mechanism for photovoltaic module and cleaning method thereof | |
| CN110617637B (en) | Heliostat single-shaft sun tracking device for solar power station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191231 Termination date: 20201227 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |