CN208461746U - A kind of family photovoltaic complexes - Google Patents
A kind of family photovoltaic complexes Download PDFInfo
- Publication number
- CN208461746U CN208461746U CN201820423031.1U CN201820423031U CN208461746U CN 208461746 U CN208461746 U CN 208461746U CN 201820423031 U CN201820423031 U CN 201820423031U CN 208461746 U CN208461746 U CN 208461746U
- Authority
- CN
- China
- Prior art keywords
- fixed
- rotary shaft
- solar panels
- embedded
- switchgear house
- 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
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Classifications
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/20—Solar thermal
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- 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
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/47—Mountings or tracking
-
- 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
- Y02E10/50—Photovoltaic [PV] energy
-
- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Photovoltaic Devices (AREA)
Abstract
The utility model provides a kind of family photovoltaic complexes, including solar panels, fixed bracket, controller, power inverter, switchgear house, battery, watt-hour meter scale, gird-connected inverter, roof, brute spring and rotary shaft, the overhead surface on roof is arranged in fixed bracket, and the fixed overhead surface for being embedded in roof, both ends are arranged above support bracket fastened left side in rotary shaft, and fixed rotation is connected to both ends above support bracket fastened left side, the top of rotary shaft is arranged in solar panels, and it is fixedly welded on the top of rotary shaft, and solar panels carry out rotation connection by rotary shaft.There are two adjusting brackets for setting, and adjusting bracket is made of reinforcing bar material, made when solar panels are installed by adjusting bracket, the angle of solar panels can be adjusted according to the case where erecting bed, so that the light application time longest of solar panels, suitable for photovoltaic plant field, there is good development prospect.
Description
Technical field
The utility model relates to photovoltaic plant technology field, specially a kind of household photovoltaic plant.
Background technique
Photovoltaic power generation is that solar energy is converted into electric energy using solar cell according to photovoltaic effect principle.
Photovoltaic generating system is mainly made of solar panel (component), controller and inverter three parts, they are mainly by electronics
Component is constituted, and is not related to mechanical part, therefore photovoltaic power generation equipment extremely refines, reliable and stable service life length, installation maintenance letter
Just.
Existing household photovoltaic plant, since the fixation bracket of solar panels is identity, so that going out during the installation process
When existing angle difference, need to carry out bracket to extend the case where being welded in cutting, it is inconvenient for operation when causing to install, so that existing
Household photovoltaic plant cannot get using and approving for photovoltaic.
Utility model content
The purpose of this utility model is intended to the skill for solving arbitrarily be adjusted angle when installation solar panels
Art problem provides a kind of family photovoltaic complexes, passes through setting adjusting bracket component in the device, can carry out solar panels
Angle is adjusted, there is wide applicability, to solve existing household photovoltaic plant mentioned above in the background art, installation is too
The problem of angle can not arbitrarily be adjusted when positive energy plate.
To achieve the above object, the utility model provides the following technical solutions: a kind of family photovoltaic complexes, including too
It is positive can plate, fixed bracket, controller, power inverter, switchgear house, battery, watt-hour meter scale, gird-connected inverter, roof, strong
The overhead surface on roof, and the fixed overhead surface for being embedded in roof, institute is arranged in power spring and rotary shaft, the fixed bracket
It states rotary shaft and both ends is set above support bracket fastened left side, and fixed rotation is connected to both ends above support bracket fastened left side,
The top of rotary shaft is arranged in the solar panels, and is fixedly welded on the top of rotary shaft, and solar panels pass through rotary shaft
Rotation connection is carried out, the inside right end of rotary shaft is arranged in the brute spring, and is embedded in the inside right end of rotary shaft, described
Battery is at the inside rear of switchgear house, and the fixed inside rear for being embedded in switchgear house, the controller are arranged in switchgear house
Inside left forward side, and the fixed inside left forward side for being embedded in switchgear house, and solar panels and controller and battery electricity
Property connection, the power inverter is arranged in the inside left forward side of switchgear house, and fixed is embedded in front of the inside of switchgear house
Left side, and power inverter and controller are electrically connected, and controller is in the surface of power inverter, the watt-hour meter scale
The outer upper side of switchgear house is set, and the fixed outer upper side for being embedded in switchgear house, the gird-connected inverter are arranged in distribution
The outer upper side of room, and the fixed outer upper side for being embedded in switchgear house, and watt metering epitope is in the underface of gird-connected inverter,
It is characterized by: the two sides rotating middle part of the solar panels is connected with adjusting bracket, fixed weldering on the inside of the bottom end of the adjusting bracket
It is connected to fixed link, the inside left forward side movable inlaying of the switchgear house has fire fighting bottle, and fire fighting bottle is located at power inverter
Right side, the support bracket fastened right side central top are embedded with fixed card slot, the top of the support bracket fastened front and back
It is embedded with locating groove, and the locating groove of two sides is kept in the same horizontal line, the both ends of the rotary shaft are embedded with adjusting
Knob, and adjusting knob by brute spring carry out elastic connection, and solar panels, controller, power inverter, battery,
Watt-hour meter scale and gird-connected inverter are electrically connected each other.
Preferably, there are two the adjusting bracket settings, and adjusting bracket is made of reinforcing bar material.
Preferably, the fire fighting bottle is provided with one, and the fire extinguishing material filled inside fire fighting bottle is dry powder.
Preferably, the fixed link is provided with one, and fixed link uses reinforcing bar material, and diameter is two centimetres.
Preferably, the fixed card slot is provided with one, and the depth of fixed card slot is five centimetres, by way of pressing
It is fixed and dismantles.
Preferably, there are six the locating groove settings, and the tip designs of locating groove have the semicircle of two cm diameters
Groove.
Preferably, there are two the adjusting knob settings, and the inner bottom of adjusting knob has gear and interior of rotating shaft
Gear is engaged.
The purpose of this utility model is intended to the skill for solving arbitrarily be adjusted angle when installation solar panels
Art problem provides a kind of family photovoltaic complexes, and passing through setting in the device, there are two adjusting brackets, and adjusting bracket uses reinforcing bar
Material is made, and is made when installing solar panels by adjusting bracket, the sun can be adjusted according to the case where erecting bed
The angle of energy plate, so that the light application time longest of solar panels, is provided with a fire fighting bottle, and the fire extinguishing filled inside fire fighting bottle
Material is dry powder, in the interior design fire fighting bottle of switchgear house, so that can rapidly put out a fire in the case of fire, due to matching
Electric chamber interior is full of electric wire, carries out fire extinguishing using dry powder and avoids getting an electric shock during saving, is provided with a fixed link, and solid
Fixed pole uses reinforcing bar material, and diameter is two centimetres, adjusting bracket is fixed by fixed link, so that solar panels are carried out angle
The fixation of degree, it is more secured using the material of reinforcing bar, it is provided with a fixed card slot, and the depth of fixed card slot is five lis
Rice, is fixed and is dismantled by way of pressing, and fixed card slot keeps fixed form when horizontality for solar panels,
The phenomenon that avoid solar panels from deviating, there are six locating grooves for setting, and the tip designs of locating groove have two lis
The semicircle groove of rice diameter, locating groove are to avoid shaking when adjusting angle for carrying out being engaged use with fixed link
Dynamic phenomenon, causes solar panels to move, setting there are two adjusting knob, and the inner bottom of adjusting knob have gear with
Interior of rotating shaft gear is engaged, and adjusting knob is to pass through internal gear for being fixed when adjusting solar panels angle
The gear of rotary shaft is engaged, to have the function that fixed.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model；
Fig. 2 is the fixing rack structure schematic diagram of the utility model；
Fig. 3 is partial sectional view at A in Fig. 2 of the utility model.
In figure: 1, solar panels, 2, adjusting bracket, 3, fixed bracket, 4, controller, 5, power inverter, 6, fire fighting bottle, 7,
Switchgear house, 8, battery, 9, watt-hour meter scale, 10, gird-connected inverter, 11, roof, 12, fixed link, 13, fixed card slot, 14,
Locating groove, 15, brute spring, 16, adjusting knob, 17, rotary shaft.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Solar panels 1 used in the utility model, controller 4, power inverter 5, fire fighting bottle 6, store fixed bracket 3
Battery 8, watt-hour meter scale 9, gird-connected inverter 10, brute spring 15, adjusting knob 16 and rotary shaft 17, can pass through city
Field purchase or private customized gained.The instrument that the utility model uses: the model CY-201A of controller, power inverter
Model SUN2000-40, the model DDSY1352 of watt-hour meter scale and gird-connected inverter model GW19K-DT.
The instrument that the utility model uses: (wound is sharp for controller (Yueqing City north white elephant Le Hui electrical apparatus factory), power inverter
Electronics Factory), watt-hour meter scale (Acrel Electric Co., Ltd.) and gird-connected inverter (Shenzhen Shan Te Electrosource, Inc.).
Fig. 1 to 3 is please referred to, the utility model provides a kind of technical solution: a kind of family photovoltaic complexes, including the sun
It can plate 1, adjusting bracket 2, fixed bracket 3, controller 4, power inverter 5, fire fighting bottle 6, switchgear house 7, battery 8, watt metering
Table 9, gird-connected inverter 10, roof 11, fixed link 12, fixed card slot 13, locating groove 14, brute spring 15, adjusting knob 16
With rotary shaft 17, the overhead surface on roof 11, and the fixed overhead surface for being embedded in roof 11, rotation is arranged in fixed bracket 3
Both ends above the left side of fixed bracket 3 are arranged in axis 17, and fixed rotation is connected to both ends above the left side of fixed bracket 3, too
The top of rotary shaft 17 is arranged in positive energy plate 1, and is fixedly welded on the top of rotary shaft 17, and solar panels 1 pass through rotary shaft
17 carry out rotation connection, and the inside right end of rotary shaft 17 is arranged in brute spring 15, and is embedded in the inside right end of rotary shaft 17,
Battery 8 is at the inside rear of switchgear house 7, and the fixed inside rear for being embedded in switchgear house 7, controller 4 are arranged in switchgear house 7
Inside left forward side, and the fixed inside left forward side for being embedded in switchgear house 7, and solar panels 1 and controller 4 and battery
8 are electrically connected, before the inside left forward side of switchgear house 7 is arranged in power inverter 5, and fixation is embedded in the inside of switchgear house 7
Side left side, and power inverter 5 and controller 4 are electrically connected, and controller 4 is in the surface of power inverter 5, watt-hour meter
The outer upper side of switchgear house 7 is arranged in scale 9, and the fixed outer upper side for being embedded in switchgear house 7, gird-connected inverter 10 are arranged
In the outer upper side of switchgear house 7, and the outer upper side for being embedded in switchgear house 7 is fixed, and watt-hour meter scale 9 is located at parallel network reverse
The underface of device 10, the two sides rotating middle part of solar panels 1 are connected with adjusting bracket 2, and setting is there are two adjusting bracket 2, and adjusting bracket 2
Be made of reinforcing bar material, made when solar panels 1 is installed by adjusting bracket 2, can according to the case where erecting bed into
Row adjusts the angle of solar panels 1, so that the light application time longest of solar panels 1, the bottom end inside of adjusting bracket 2 is fixedly welded with
Fixed link 12 is provided with a fixed link 12, and fixed link 12 uses reinforcing bar material, and diameter is two centimetres, passes through fixed link 12
Adjusting bracket 2 is fixed, so that solar panels 1 to be carried out to the fixation of angle, distribution more secured using the material of reinforcing bar
The inside left forward side movable inlaying of room 7 has fire fighting bottle 6, is provided with a fire fighting bottle 6, and the fire extinguishing filled inside fire fighting bottle 6
Material is dry powder, in the interior design fire fighting bottle 6 of switchgear house 7, so that can rapidly put out a fire in the case of fire, due to
It is full of electric wire inside switchgear house 7, carries out fire extinguishing using dry powder and avoids getting an electric shock during saving, and fire fighting bottle 6 is located at power supply
The right side central top on the right side of inverter 5, fixed bracket 3 is embedded with fixed card slot 13, is provided with a fixed card slot 13, and
The depth of fixed card slot 13 is five centimetres, is fixed and is dismantled by way of pressing, and fixed card slot 13 is used for solar panels 1
Fixed form when horizontality is kept, thus the phenomenon that avoiding solar panels 1 from deviating, the front of fixed bracket 3 is with after
The top of side is embedded with locating groove 14, and there are six locating grooves 14 for setting, and the tip designs of locating groove 14 have two centimetres
The semicircle groove of diameter, locating groove 14 are to avoid shaking when adjusting angle for carrying out being engaged use with fixed link
Dynamic phenomenon causes solar panels 1 to move, and the locating groove 14 of two sides is kept in the same horizontal line, rotary shaft 17
Both ends be embedded with adjusting knob 16, there are two adjusting knobs 16 for setting, and the inner bottom of adjusting knob 16 has gear and rotation
17 internal gear of shaft is engaged, and adjusting knob 16 is to pass through internal tooth for being fixed when adjusting 1 angle of solar panels
The gear of rotary shaft 17 is engaged by wheel, to have the function that fixed, and adjusting knob 16 is carried out by brute spring 15
Elastic connection, and solar panels 1, controller 4, power inverter 5, battery 8, watt-hour meter scale 9 and gird-connected inverter 10 are mutual
To be electrically connected.
When using a kind of family of the utility model photovoltaic complexes, this kind of family photovoltaic (complete) device should be first understood
Fixed bracket 3 is mounted on the top on roof 11 first, and adjusts solar panels 1 by the overall structure and application method of device
Angle be engaged connecting, adjusted by the fixed link 12 between adjusting bracket 2 with the locating groove 14 on fixed bracket 3
Before, the adjusting knob 16 at 17 middle part of rotary shaft of fixed 3 bottom of bracket is first pressed, the gear that inside is engaged separates, Ji Kejin
The angle of row rotation solar panels 1, then adjusting knob 16 is rebounded again and carries out being engaged fixation by brute spring 15, by solar energy
Plate 1, which is adjusted, arrives the longest angle of light application time, and power supply line can be corresponded to the top that hole is mounted on controller 4, solar panels 1
It converts the solar into electric energy and is stored in battery 8, after the storage of battery 8 is full, extra electricity is passed through into gird-connected inverter 10
It is attached with alternating current, and record electricity is carried out by watt-hour meter scale 9.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (7)
1. a kind of family photovoltaic complexes, including solar panels (1), fixed bracket (3), controller (4), power inverter
(5), switchgear house (7), battery (8), watt-hour meter scale (9), gird-connected inverter (10), roof (11), brute spring (15) and
The overhead surface in roof (11), and the fixed top for being embedded in roof (11) is arranged in rotary shaft (17), the fixed bracket (3)
Surface, rotary shaft (17) setting both ends above the left side of fixed bracket (3), and fixed rotation is connected to fixed bracket
(3) both ends above left side, the solar panels (1) are arranged in the top of rotary shaft (17), and are fixedly welded on rotary shaft
(17) top, and solar panels (1) carry out rotation connection by rotary shaft (17), brute spring (15) setting is rotating
The inside right end of axis (17), and it is embedded in the inside right end of rotary shaft (17), inside of the battery (8) in switchgear house (7)
Rear, and the fixed inside rear for being embedded in switchgear house (7), controller (4) setting are left in front of the inside of switchgear house (7)
Side, and the fixed inside left forward side for being embedded in switchgear house (7), and solar panels (1) and controller (4) and battery (8) electricity
Property connection, the power inverter (5) setting is in the inside left forward side of switchgear house (7), and fixation is embedded in switchgear house (7)
Internal left forward side, and power inverter (5) and controller (4) are electrically connected, and controller (4) is in power inverter (5)
The outer upper side in switchgear house (7), and the fixed outside for being embedded in switchgear house (7) is arranged in surface, the watt-hour meter scale (9)
The outer upper side in switchgear house (7), and the fixed outside for being embedded in switchgear house (7) is arranged in top, the gird-connected inverter (10)
Top, and watt-hour meter scale (9) is located at the underface of gird-connected inverter (10), it is characterised in that: the two of the solar panels (1)
Middle side part rotation is connected with adjusting bracket (2), is fixedly welded with fixed link (12) on the inside of the bottom end of the adjusting bracket (2), described to match
The inside left forward side movable inlaying of electric room (7) has fire fighting bottle (6), and fire fighting bottle (6) is located at the right side of power inverter (5),
It is embedded with fixed card slot (13) above the right side central of the fixed bracket (3), the front and back of the fixed bracket (3)
Top is embedded with locating groove (14), and the locating groove (14) of two sides is kept in the same horizontal line, the rotary shaft (17)
Both ends be embedded with adjusting knob (16), and adjusting knob (16) carries out elastic connection, and solar energy by brute spring (15)
Plate (1), controller (4), power inverter (5), battery (8), watt-hour meter scale (9) and gird-connected inverter (10) are electrical each other
Connection.
2. a kind of family photovoltaic complexes according to claim 1, it is characterised in that: the adjusting bracket (2) is provided with
Two, and adjusting bracket (2) is made of reinforcing bar material.
3. a kind of family photovoltaic complexes according to claim 1, it is characterised in that: the fire fighting bottle (6) is provided with
One, and the fire extinguishing material filled inside fire fighting bottle (6) is dry powder.
4. a kind of family photovoltaic complexes according to claim 1, it is characterised in that: the fixed link (12) is provided with
One, and fixed link (12) uses reinforcing bar material, diameter is two centimetres.
5. a kind of family photovoltaic complexes according to claim 1, it is characterised in that: fixed card slot (13) setting
There is one, and the depth of fixed card slot (13) is five centimetres, is fixed and dismantles by way of pressing.
6. a kind of family photovoltaic complexes according to claim 1, it is characterised in that: locating groove (14) setting
There are six, and the tip designs of locating groove (14) have the semicircle groove of two cm diameters.
7. a kind of family photovoltaic complexes according to claim 1, it is characterised in that: adjusting knob (16) setting
There are two, and the inner bottom of adjusting knob (16) has gear to be engaged with rotary shaft (17) internal gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820423031.1U CN208461746U (en) | 2018-03-26 | 2018-03-26 | A kind of family photovoltaic complexes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820423031.1U CN208461746U (en) | 2018-03-26 | 2018-03-26 | A kind of family photovoltaic complexes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208461746U true CN208461746U (en) | 2019-02-01 |
Family
ID=65156890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820423031.1U Expired - Fee Related CN208461746U (en) | 2018-03-26 | 2018-03-26 | A kind of family photovoltaic complexes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208461746U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110158503A (en) * | 2019-06-22 | 2019-08-23 | 宁波鄞州竹创信息科技有限公司 | Alarming device is used in a kind of civic building construction |
-
2018
- 2018-03-26 CN CN201820423031.1U patent/CN208461746U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110158503A (en) * | 2019-06-22 | 2019-08-23 | 宁波鄞州竹创信息科技有限公司 | Alarming device is used in a kind of civic building construction |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190201 |
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| CF01 | Termination of patent right due to non-payment of annual fee |