CN207134617U - A kind of optical cable computer room - Google Patents
A kind of optical cable computer room Download PDFInfo
- Publication number
- CN207134617U CN207134617U CN201720847671.0U CN201720847671U CN207134617U CN 207134617 U CN207134617 U CN 207134617U CN 201720847671 U CN201720847671 U CN 201720847671U CN 207134617 U CN207134617 U CN 207134617U
- Authority
- CN
- China
- Prior art keywords
- computer room
- ventilation shaft
- holding tray
- power distribution
- distribution cabinet
- 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 77
- 238000009423 ventilation Methods 0.000 claims abstract description 60
- 238000010521 absorption reaction Methods 0.000 claims abstract description 47
- 238000001035 drying Methods 0.000 claims abstract description 4
- 230000002745 absorbent Effects 0.000 claims description 50
- 239000002250 absorbent Substances 0.000 claims description 50
- 210000002268 wool Anatomy 0.000 claims description 49
- 238000009413 insulation Methods 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 17
- 238000005096 rolling process Methods 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 claims description 3
- 210000004209 hair Anatomy 0.000 claims 1
- 230000002262 irrigation Effects 0.000 abstract 1
- 238000003973 irrigation Methods 0.000 abstract 1
- 238000001704 evaporation Methods 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 229920000742 Cotton Polymers 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Drying Of Solid Materials (AREA)
Abstract
The utility model discloses a kind of optical cable computer room, it is intended to keeps the power distribution cabinet in computer room to dry for a long time, its drip irrigation device is：A kind of optical cable computer room, including computer room, the power distribution cabinet being installed in computer room, ventilation shaft, blower fan, one end of ventilation shaft is communicated in the upper surface of power distribution cabinet, the other end is communicated in power distribution cabinet side wall, the assembling is in ventilation shaft, the ventilation shaft is communicated with hollow holding tray, the holding tray diameter is more than the ventilation shaft diameter, and holding tray and the ventilation shaft eccentric setting, it is provided with holding tray for absorbing moisture in ventilation shaft and stress is in the water absorption plate of blower fan turned, the holding tray is provided with the heater for drying water absorption plate away from ventilation shaft side bottom surface, the holding tray upper surface is located at the positive upper side position of heater and offers steam vent.A kind of optical cable computer room of the present utility model, can keep the power distribution cabinet in computer room to dry for a long time.
Description
Technical field
Fiber optic cable plant field is the utility model is related to, more specifically, it relates to a kind of optical cable computer room.
Background technology
With the highdensity rapid development trend of data center, each cell or village are mounted on optical cable computer room.In optical cable
In computer room, because each heat generating components produces substantial amounts of heat in power distribution cabinet, the normal operation of power distribution cabinet can be influenceed.In the winter time or plum
In rainy season, humidity is excessive in power distribution cabinet, also results in power distribution cabinet failure.
A kind of computer room power distribution cabinet protection against the tide heat abstractor that the Chinese patent that notification number is CN204012323U is announced, its technology
Main points are：Including air exhauster, ventilation shaft and multiple distribution cabinets, the ventilation shaft connects each distribution cabinet and air exhauster
Into a ventilation circuit, be connected in the ventilation shaft it is multiple be air-dried pipe, a condensation is further connected with the ventilation shaft
Pipe.
Air in power distribution cabinet case is extracted into the drying for being air-dried in pipe and being air-dried by this in pipe in such scheme
And the moisture in absorption air, then air is flow back in power distribution cabinet, but is lost after absorbing a certain amount of moisture due to drier
Absorbent function, air in power distribution cabinet is not dried fully, shorten its effective usage time.
Therefore need to propose a kind of new scheme to solve this problem.
Utility model content
In view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of optical cable computer room, can make to match somebody with somebody
Electric cabinet keeps long-term and dried.
Above-mentioned technical purpose of the present utility model technical scheme is that：A kind of optical cable computer room, bag
Computer room, the power distribution cabinet being installed in computer room, ventilation shaft, blower fan are included, one end of ventilation shaft is communicated in the upper surface of power distribution cabinet,
The other end is communicated in power distribution cabinet side wall, and the assembling is communicated with hollow placement in ventilation shaft, the ventilation shaft
Disk, the holding tray diameter are more than the ventilation shaft diameter, and holding tray and the ventilation shaft eccentric setting, in holding tray
It is provided with for absorbing moisture in ventilation shaft and stress is in the water absorption plate of blower fan turned, the holding tray is away from ventilation duct
Road side bottom surface is provided with the heater for drying water absorption plate, and the holding tray upper surface is located at the positive upside position of heater
Put and offer steam vent.
By using above-mentioned technical proposal, air is flowed into ventilation shaft and by holding tray in blower fan driving power distribution cabinet
Water absorption plate flow back in power distribution cabinet, when air passes through water absorption plate, the moisture in water absorption plate absorption air, and being pushed away by wind-force
Dynamic water absorption plate, which rotates and water absorption plate is inhaled the side for having moisture, turns to the upside of heater, and is made by heating devices heat
Moisture evaporation in water absorption plate is simultaneously discharged to holding tray from steam vent, so reduces ventilation shaft and flows back in power distribution cabinet in air
Moisture, and keep power distribution cabinet to dry for a long time.
The utility model is further arranged to：The water absorption plate includes the thermal insulation board that several are in divergent shape setting, adjacent
Several flakes are provided between two thermal insulation boards and stress drives the absorbent wool of thermal insulation board rotation, the absorbent wool in wind-force
It is inclined to set.
By using above-mentioned technical proposal, after air is flowed into holding tray by ventilation shaft in power distribution cabinet, by absorbing water
Moisture absorption in air, then air permeable absorbent wool are flowed out holding tray and flow back to power distribution cabinet by cotton, when air passes through water suction
During cotton, the Wind power propelling absorbent wool and thermal insulation board that are formed by air rotate, and absorbent wool is inhaled to the side for having moisture and turned to and is added
Hot charging seated position, and the moisture evaporation in absorbent wool is then discharged holding tray from steam vent by heater；And pass through
Thermal insulation board prevents that Heat transmission occurs between the absorbent wool of thermal insulation board both sides.
The utility model is further arranged to：The water absorption plate center is provided with rotating shaft, and the rotating shaft is fixedly connected
In the thermal insulation board, the axial direction of the rotating shaft is in being vertically arranged, and the rotating shaft is provided at both ends with rolling bearing.
By using above-mentioned technical proposal, water absorption plate is rotated by rotating shaft relative to holding tray, and is made by rolling bearing
Axis of rotation is lighter.
The utility model is further arranged to：The cooling device for cooling down water absorption plate is provided with the computer room, it is described
Cooling device includes the water storage box that is arranged in computer room, both ends are communicated in the water inlet pipe of the water storage box, are arranged at holding tray
The first condenser pipe that is interior and fitting in the water absorption plate, the first condenser pipe both ends are connected with the water inlet pipe.
By using above-mentioned technical proposal, when the absorbent wool after heating turns to the first condenser pipe position, the first condensation
Water cooling absorbent wool in pipe, the absorbent wool after so cooling down promote the vapor in air to condense to the cold, inhaled so as to improve
The efficiency of water cotton water suction.
The utility model is further arranged to：The ventilation shaft side wall is provided with the second condenser pipe, second condensation
Pipe is arranged on the downside of the holding tray, and the both ends of second condenser pipe are connected with the water inlet pipe.
By using above-mentioned technical proposal, the second condenser pipe can cool down the air that power distribution cabinet is flowed back to by holding tray, so as to
Reach the function to power distribution cabinet cooling.
The utility model is further arranged to：It is provided with the water storage box for driving water circulation flowing in water inlet pipe
Transfer tube.
By using above-mentioned technical proposal, the water in water inlet pipe, the first condenser pipe and the second condenser pipe is made by transfer tube
Circulate, so as to improve the first condenser pipe and the second condenser pipe cooling effectiveness.
The utility model is further arranged to：Rotated in the ventilation shaft close to the upper surface position of the holding tray
Several adjustable plates for being used to adjust wind direction are connected with, ventilation shaft outer wall is provided with the tune for controlling the adjustable plate to rotate
Locking nub.
By using above-mentioned technical proposal, rotate adjustable plate by turning regulating block, and adjust air from ventilation shaft
The angle of holding tray is flowed into, the wind-force and the angle of absorbent wool that air is formed change, and are decomposited so as to change wind-force to use
In the size for promoting absorbent wool and the decomposing force of thermal insulation board rotation, the rotating speed by adjusting water absorption plate is thus reached.
The utility model is further arranged to：The holding tray is connected with for steam vent to be vented into body discharge computer room
Breather pipe, the breather pipe are communicated in steam vent.
By using above-mentioned technical proposal, the vapor for being discharged steam vent by breather pipe is directly discharged to outside computer room
Side.
In summary, the utility model has the advantages that：
First, working as needs to carry out the anti-time of tide power distribution cabinet, driving blower fan makes the air in power distribution cabinet flow into holding tray, so
Afterwards by absorbent wool by the moisture absorption in air, then air permeable absorbent wool outflow holding tray and power distribution cabinet is flowed back to；Work as air
During through absorbent wool, the Wind power propelling absorbent wool and thermal insulation board that are formed by air rotate, and absorbent wool is inhaled to the side for having moisture
Heater position is turned to, and the moisture evaporation in absorbent wool is then discharged holding tray from steam vent by heater 7；
Second, improving absorbent wool water-taking efficiency by the first condenser pipe, the temperature in power distribution cabinet is reduced by the second condenser pipe
Degree.
Brief description of the drawings
Fig. 1 is the structural representation of the present embodiment；
Fig. 2 is the sectional view of the present embodiment, is mainly used in showing equipment inner structure；
Fig. 3 is Fig. 2 A portions zoomed-in view, is mainly used in showing water absorption plate；
Fig. 4 is the part structural representation of the present embodiment, is mainly used in showing water absorption plate；
Fig. 5 is Fig. 4 B portions zoomed-in view.
In figure：1st, computer room；2nd, power distribution cabinet；3rd, ventilation shaft；4th, blower fan；5th, holding tray；6th, water absorption plate；7th, heater；
8th, steam vent；9th, breather pipe；10th, thermal insulation board；11st, absorbent wool；12nd, rotating shaft；13rd, rolling bearing；14th, adjustable plate；15th, adjust
Block；16th, water storage box；17th, water inlet pipe；18th, transfer tube；19th, the first condenser pipe；20th, the second condenser pipe.
Embodiment
With reference to the accompanying drawings and examples, the utility model is described in detail.
A kind of optical cable computer room, as depicted in figs. 1 and 2, including computer room 1, power distribution cabinet 2 is installed in computer room 1, power distribution cabinet 2 connects
Ventilation shaft 3 is connected with, ventilation shaft 3 is set in tubular, and one end of ventilation shaft 3 is communicated in the upper surface of power distribution cabinet 2, another
End is communicated in the side wall of power distribution cabinet 2 close to lower surface position, and ventilation shaft 3 is connected with blower fan 4, and blower fan 4 drives empty in power distribution cabinet 2
Gas flows into ventilation shaft 3 by the upper surface of power distribution cabinet 2.The stage casing of ventilation shaft 3 is communicated with holding tray 5, and holding tray 5 is in hollow cylinder
Body is set, and the center line of holding tray 5 is in being vertically arranged, and the internal diameter of holding tray 5 is more than the diameter of ventilation shaft 3, holding tray 5 with
Ventilation shaft 3 is in eccentric setting, as shown in figure 3, being rotatably connected in holding tray 5 for absorbing by moisture in air in pipeline
Water absorption plate 6, water absorption plate 6 can stress in turned, bottom surface of the holding tray 5 away from the side of ventilation shaft 3, which is provided with, to be used for
Dry the heater 7 of water absorption plate 6, heater 7 can be heating wire etc., the upper surface of holding tray 5 and be located at heater 7
Position directly above offers steam vent 8, and steam vent 8 is connected with the breather pipe 9 for steam vent 8 to be vented to body discharge computer room 1.
So blower fan 4 drives air in power distribution cabinet 2 to flow into ventilation shaft 3 and flow back to power distribution cabinet 2 by the water absorption plate 6 in holding tray 5
It is interior, when air is by water absorption plate 6, the moisture in the absorption air of water absorption plate 6, and rotated simultaneously by Wind power propelling water absorption plate 6
Water absorption plate 6 is inhaled the upside that the side for having moisture turns to heater 7, and made by the heating of heater 7 in water absorption plate 6
Moisture evaporation simultaneously enters in breather pipe 9 from steam vent 8, and then vapor just discharges computer room 1 by breather pipe 9, so reduces
Ventilation shaft 3 flows back to the moisture in air in power distribution cabinet 2, and because water absorption plate 6 can recycle, so as to reach holding distribution
Cabinet 2 is dried for a long time.
As shown in Figure 4 and Figure 5, the rotating shaft 12 for being arranged at the position at the center of water absorption plate 6 is included in water absorption plate 6, rotating shaft 12
Axis is in be vertically arranged, and the both ends of rotating shaft 12 are provided with rolling bearing 13, and rotating shaft 12 is rotatablely connected by rolling bearing 13
Rotating shaft 12 is set to rotate lighter, the side wall of rotating shaft 12 relative to holding tray 5 in the inwall of holding tray 5, and by rolling bearing 13
Five thermal insulation boards 10 are fixedly connected with, five thermal insulation boards 10 are set in divergent shape, and the upper and lower ends of thermal insulation board 10 fit in placement
The inwall of disk 5, it is in laminar absorbent wool 11 to be provided with several between two neighboring thermal insulation board 10, and absorbent wool 11 is inclined sets
Put, such stress of absorbent wool 11 drives thermal insulation board 10 to be rotated relative to holding tray 5 in the wind-force of blower fan 4.When air leads in power distribution cabinet 2
Cross after ventilation shaft 3 flowed into holding tray 5, by absorbent wool 11 by the moisture absorption in air, then air permeable absorbent wool 11
Outflow holding tray 5 simultaneously flows back to power distribution cabinet 2, when air passes through absorbent wool 11, the Wind power propelling absorbent wool 11 that is formed by air and
Thermal insulation board 10 rotates, and absorbent wool 11 is inhaled to the side for having moisture and turns to the position of heater 7, and is made by heater 7
Then moisture evaporation in absorbent wool 11 discharges holding tray 5 from steam vent 8, and prevent the both sides of thermal insulation board 10 by thermal insulation board 10
Absorbent wool 11 between Heat transmission occurs.
In order to facilitate the rotating speed of control water absorption plate 6, as shown in figure 3, close to the upper surface position of holding tray 5 in ventilation shaft 3
The adjustable plate 14 for being rotatably connected to several regulation wind directions is put, adjustable plate 14 is set in slice-shaped, and adjustable plate 14 is in ventilation duct
The rotation in road 3 is radially arranged axially along holding tray 5, and the outer wall of ventilation shaft 3 is provided with the regulation for controlling to adjust the rotation of plate 14
Block 15, regulating block 15 is set in cylinder, and adjustable plate 14 is fixedly connected on regulating block 15.So made by turning regulating block 15
Adjustable plate 14 rotates, and adjusts the angle that air flows into holding tray 5 from ventilation shaft 3, the wind-force that air is formed and absorbent wool 11
Angle change, decomposited so as to change wind-force come for the big of the decomposing force for promoting absorbent wool 11 and thermal insulation board 10 to rotate
It is small, thus reach the rotating speed by adjusting water absorption plate 6.
In order to facilitate cooling absorbent wool 11 and the air flowed back in power distribution cabinet 2, as shown in Figure 2 and Figure 5, set in computer room 1
There is cooling device, cooling device includes the water storage box 16 being arranged in computer room 1, and water storage box 16 is communicated with water inlet pipe 17, and intakes
The both ends of pipe 17 are communicated in water storage box 16, are provided with water storage box 16 for driving the water in water storage box 16 to flow into water inlet pipe 17
Transfer tube 18；Water inlet pipe 17 is connected with the first condenser pipe 19 for cooling down absorbent wool 11, and the first condenser pipe 19 is in " several " word
Shape is set, and the first condenser pipe 19 fits in holding tray 5 and fits in the upper surface of water absorption plate 6, and the first condenser pipe 19
In holding tray 5 and between ventilation shaft 3 and heater 7, corresponding absorbent wool 11 is passed through successively by the position of ventilation shaft 3
Cross heater 7, the first condenser pipe 19 goes back to the position of ventilation shaft 3 again；Absorbent wool 11 so after heating turns to first
During 19 position of condenser pipe, the water cooling absorbent wool 11 in the first condenser pipe 19, the absorbent wool 11 after so cooling down promotes in air
Vapor condense to the cold, so as to improve absorbent wool 11 water suction efficiency.Water inlet pipe 17 is also associated with the second condenser pipe 20, the
Two condenser pipes 20 are twist set, and the second condenser pipe 20 is arranged at the side wall of ventilation shaft 3, and the second condenser pipe 20 is positioned at putting
Put the downside of disk 5；Such second condenser pipe 20 can just cool down the air that power distribution cabinet 2 is flowed back to by holding tray 5.
When needing that power distribution cabinet 2 is carried out the anti-time of tide, driving blower fan 4 makes the air in power distribution cabinet 2 flow into holding tray 5, so
Afterwards by absorbent wool 11 by the moisture absorption in air, then air permeable absorbent wool 11 flows out holding tray 5 and flows back to power distribution cabinet 2；
When air passes through absorbent wool 11, the Wind power propelling absorbent wool 11 and thermal insulation board 10 that are formed by air rotate, and by absorbent wool 11
The side that inhaling has moisture turns to the position of heater 7, and by heater 7 make moisture evaporation in absorbent wool 11 then from
Steam vent 8 discharges holding tray 5；Absorbent wool 11 be heated by the cooling of the first condenser pipe 19 simultaneously after, and improve absorbent wool 11
Water-taking efficiency, makes the cools air that holding tray 5 flowed back in power distribution cabinet 2 by the second condenser pipe 20, and power distribution cabinet 2 is reduced so as to reach
Interior temperature.
Described above is only preferred embodiment of the present utility model, and the scope of protection of the utility model is not limited merely to
Above-described embodiment, all technical schemes belonged under the utility model thinking belong to the scope of protection of the utility model.It should refer to
Go out, for those skilled in the art, some improvement under the premise of the utility model principle is not departed from and
Retouching, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (8)
1. a kind of optical cable computer room, including computer room（1）, be installed on computer room（1）Interior power distribution cabinet（2）, ventilation shaft（3）, blower fan
（4）, the ventilation shaft（3）One end be communicated in power distribution cabinet（2）Upper surface, the other end is communicated in power distribution cabinet（2）Side wall, institute
State blower fan（4）It is installed on ventilation shaft（3）, it is characterised in that：The ventilation shaft（3）It is in hollow holding tray to be communicated with（5）,
The holding tray（5）Diameter is more than the ventilation shaft（3）Diameter, and holding tray（5）With the ventilation shaft（3）Bias is set
Put, holding tray（5）Inside it is provided with for absorbing ventilation shaft（3）Interior moisture and stress is in blower fan（4）The water absorption plate of turned
（6）, the holding tray（5）Away from ventilation shaft（3）Side bottom surface is provided with for drying water absorption plate（6）Heater（7）,
The holding tray（5）Upper surface is located at heater（7）Positive upper side position offers steam vent（8）.
A kind of 2. optical cable computer room according to claim 1, it is characterised in that：The water absorption plate（6）Including several in hair
The thermal insulation board that bulk is set（10）, two neighboring thermal insulation board（10）Between be provided with several flake and stress in wind-force drive
Thermal insulation board（10）The absorbent wool of rotation（11）, the absorbent wool（11）It is inclined to set.
A kind of 3. optical cable computer room according to claim 2, it is characterised in that：The water absorption plate（6）Center is provided with
Rotating shaft（12）, the rotating shaft（12）It is fixedly connected on the thermal insulation board（10）, the rotating shaft（12）Axial direction in being vertically arranged, and
The rotating shaft（12）Be provided at both ends with rolling bearing（13）.
A kind of 4. optical cable computer room according to claim 1, it is characterised in that：The computer room（1）Inside it is provided with for cooling down
Water absorption plate（6）Cooling device, the cooling device include be arranged at computer room（1）Interior water storage box（16）, both ends are communicated in
The water storage box（16）Water inlet pipe（17）, be arranged at holding tray（5）It is interior and fit in the water absorption plate（6）The first condenser pipe
（19）, first condenser pipe（19）Both ends and the water inlet pipe（17）It is connected.
A kind of 5. optical cable computer room according to claim 4, it is characterised in that：The ventilation shaft（3）Side wall is provided with
Two condenser pipes（20）, second condenser pipe（20）It is arranged at the holding tray（5）Downside, and second condenser pipe（20）'s
Both ends and the water inlet pipe（17）It is connected.
A kind of 6. optical cable computer room according to claim 5, it is characterised in that：The water storage box（16）Inside it is provided with for driving
Dynamic water inlet pipe（17）The transfer tube of interior water circulation flowing（18）.
A kind of 7. optical cable computer room according to claim 3, it is characterised in that：The ventilation shaft（3）It is interior close to described
Holding tray（5）Upper surface position be rotatably connected to several and be used to adjust the adjustable plate of wind direction（14）, ventilation shaft（3）Outer wall
It is provided with for controlling the adjustable plate（14）The regulating block of rotation（15）.
A kind of 8. optical cable computer room according to claim 1, it is characterised in that：The holding tray（5）It is connected with for that will arrange
Stomata（8）Be vented body discharges computer room（1）Breather pipe（9）, the breather pipe（9）It is communicated in the steam vent（8）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720847671.0U CN207134617U (en) | 2017-07-13 | 2017-07-13 | A kind of optical cable computer room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720847671.0U CN207134617U (en) | 2017-07-13 | 2017-07-13 | A kind of optical cable computer room |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207134617U true CN207134617U (en) | 2018-03-23 |
Family
ID=61634343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720847671.0U Expired - Fee Related CN207134617U (en) | 2017-07-13 | 2017-07-13 | A kind of optical cable computer room |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207134617U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110323710A (en) * | 2019-06-21 | 2019-10-11 | 芜湖金牛电气股份有限公司 | Cable branch box moistureproof system |
-
2017
- 2017-07-13 CN CN201720847671.0U patent/CN207134617U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110323710A (en) * | 2019-06-21 | 2019-10-11 | 芜湖金牛电气股份有限公司 | Cable branch box moistureproof system |
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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: 20180323 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |