CN106762749A - Water heater brushless direct-current air blower - Google Patents
Water heater brushless direct-current air blower Download PDFInfo
- Publication number
- CN106762749A CN106762749A CN201710193603.1A CN201710193603A CN106762749A CN 106762749 A CN106762749 A CN 106762749A CN 201710193603 A CN201710193603 A CN 201710193603A CN 106762749 A CN106762749 A CN 106762749A
- Authority
- CN
- China
- Prior art keywords
- output shaft
- wind wheel
- nut
- steel loop
- glue ring
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 239000003292 glue Substances 0.000 claims abstract description 53
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 52
- 239000010959 steel Substances 0.000 claims abstract description 52
- 239000000463 material Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims 1
- 229910052710 silicon Inorganic materials 0.000 claims 1
- 239000010703 silicon Substances 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 description 8
- 230000001360 synchronised effect Effects 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001095 motoneuron effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/002—Details, component parts, or accessories especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses water heater brushless direct-current air blower, including casing, positioned at the motor of casing internal, wind wheel is connected on the output shaft of motor, also including glue ring, steel loop, the glue ring, the twice of the external diameter more than or equal to output shaft external diameter of steel loop;The glue ring, steel loop are set on the output shaft of motor, and glue ring is located at wind wheel both sides, and steel loop is located at glue ring away from the side of wind wheel;The wind wheel is fixed on the axis collinear of the outer end of output shaft, nut and output shaft by nut, and when output shaft is rotated clockwise, the nut uses left-handed nut;When output shaft is rotated counterclockwise, the nut uses right-handed nut.It is an object of the invention to provide water heater brushless direct-current air blower, so that vibrations are big when solving the problems, such as that prior art wind wheel is rotated, easily loosen, realize reducing wind wheel vibrations, prevent the purpose that voluntarily loosens.
Description
Technical field
The present invention relates to DC blower field, and in particular to water heater brushless direct-current air blower.
Background technology
DC fan refers to, by input direct-current electric energy, dc motor is rotated to drive draught fan impeller to rotate, so that
Realize blower fan of the direct current energy to mechanical energy transfer process.The characteristics of DC fan is maximum is to have matched dc motor.At present
Using DC brushless motor DC fan more, brshless DC motor due to eliminating the collector ring and brush of commutation, in structure
On greatly simplify.The manufacturability of motor is not only improved simultaneously, and the Mechanical Reliability of motor operation is greatly enhanced, and the life-span increases
Plus.But, the wind wheel of existing brushless direct-current air blower is connected with axle and is directly connected by screw bolts, and wind wheel assembles easy deflection, shake
It is dynamic big:Wind wheel rotates easy loose or dislocation for a long time.After wind wheel loose or dislocation, maintenance personal is regarded as because vibrations are larger
Threaded connection is caused gradually to loosen, processing mode is all to bolt on to fasten again again.
The content of the invention
It is an object of the invention to provide water heater brushless direct-current air blower, when being rotated with solving prior art wind wheel
Vibrations are big, problem that is easily loosening, realize reducing wind wheel vibrations, prevent the purpose that voluntarily loosens.
The present invention is achieved through the following technical solutions:
Water heater brushless direct-current air blower, including casing, connect on the motor of casing internal, the output shaft of motor
Wind wheel, also including glue ring, steel loop, the glue ring, the twice of the external diameter more than or equal to output shaft external diameter of steel loop;The glue ring, steel
Ring is set on the output shaft of motor, and glue ring is located at wind wheel both sides, and steel loop is located at glue ring away from the side of wind wheel;The wind
Wheel is fixed on the axis collinear of the outer end of output shaft, nut and output shaft by nut, and when output shaft is rotated clockwise, institute
State nut and use left-handed nut;When output shaft is rotated counterclockwise, the nut uses right-handed nut.
In the prior art, wind wheel is directly connected by screw bolts with rotating shaft, and wind wheel vibrations are big, long-time is rotated and easily loosen de-
Fall.But after wind wheel loose or dislocation, technical staff is regarded as causing threaded connection gradually to loosen due to shaking larger, processes
Mode is all to bolt on to fasten again again.So to enable to wind wheel to temporarily get firm for treatment, but when using one section
Between after can start to loosen again, result in the need for often being fastened, workload is big and frequent.Present inventor is largely putting into practice
With grope in think, existing bolt and rotating shaft in theory common rotation, should be relatively fixed between the two, both is intrinsic
Frequency also and is differed, and resonance can not possibly be produced during vibrations, therefore merely because why vibrations can cause frequently to loosen.For
This problem, inventor has found that coming off for wind wheel use spiral shell mainly due to wind wheel and rotating shaft after lot of experiments and research is carried out
Tether when connecing, rotating shaft rotating speed keeps constant with direction under motor effect, and the area of section of wind wheel is much larger than rotating shaft, wind wheel fortune
Much larger than rotating shaft, the interference that wind wheel is also more prone to be subject to external impurities than rotating shaft is stopped the dynamic resistance being subject to.Due to existing
Motor mostly drives wind wheel to rotate clockwise, and conventional bolt is all dextrorotation, once therefore wind wheel is subject to larger air to hinder
Power or air blower inside are slightly stopped wind wheel into a little debris, then wind wheel velocity of rotation can be caused to be slower than rotating shaft, wind wheel
There is relative displacement between rotating shaft, wind wheel can cause right-hand bolt slowly to screw out with respect to rotating shaft counterclockwise movement, then by wind
Vibrations when wheel is rotated accelerate the back-out process, ultimately result in wind wheel loose or dislocation.To sum up, vibrations are only wind wheel loose or dislocation
Cofactor, its main cause is really the relative displacement between wind wheel and rotating shaft and causes.For the problem, the present invention
A kind of water heater brushless direct-current air blower, including casing are proposed, is connected on the motor of casing internal, the output shaft of motor
The both sides of wind wheel, wherein wind wheel set gradually glue ring, the steel loop being set on output shaft, and the external diameter of glue ring, steel loop is more than
Equal to the twice of output shaft external diameter, be glue ring, steel loop much larger than output shaft, be used to increase the contact between output shaft and wind wheel
Area.There are glue ring and steel loop in the both sides of wind wheel, and enough strength supports are provided by steel loop, prevent wind wheel to the side of output shaft two
To moving.Simultaneously by glue ring increasing friction force, it is ensured that wind wheel rotates with output shaft synchronous.Additionally, glue ring can also be provided
Elastic force is used to absorb wind wheel vibrations, damping noise reduction vertically.The wind wheel is fixed on the outer end of output shaft, spiral shell by nut
Female axis collinear with output shaft, and when output shaft is rotated clockwise, the nut uses left-handed nut;When the output shaft inverse time
When pin is rotated, the nut uses right-handed nut.It is that the connection between wind wheel and output shaft is fastened by nut.Together
When, when motor drives output shaft to be rotated in the direction of the clock, then the nut uses left-handed nut, now, if wind wheel
The rotating speed of output shaft is less than by external condition interference rotating speed, wind wheel on the contrary can with respect to output shaft rotate counterclockwise, left-handed nut
It is tightened;Likewise, when motor drives output shaft to be rotated counterclockwise, then the nut uses right-handed nut,
Now, if wind wheel has been less than the rotating speed of output shaft by external condition interference rotating speed, wind wheel turns clockwise with respect to output shaft, dextrorotation
Nut can equally be tightened.Therefore different nuts is used according to the different rotation direction of output shaft in the present invention, even if wind
There is relative displacement between wheel and output shaft, the displacement can cause that wind wheel is more fastened with the connection of output shaft on the contrary, so as to solve
Vibrations are big when prior art wind wheel of having determined is rotated, problem that is easily loosening, realize reducing wind wheel vibrations, prevent the mesh that voluntarily loosens
's.Instant invention overcomes think wind wheel loose or dislocation in the prior art entirely due to frequently vibrations caused by technology prejudice,
With prominent substantive distinguishing features and marked improvement.
Preferably, also including being arranged on the controller of casing internal, controller is connected with motor, for controlled motor rotation
Turn.It is so that motor direction of rotation is controllable, so that the rotation direction of output shaft is controllable, in order to change the spiral shell of different rotation directions
Imperial mother, it is also possible to the rotation direction of output shaft is adjusted flexibly, it is ensured that reduce wind wheel vibrations, prevent the technique effect that voluntarily loosens.
Preferably, the glue ring is made using silica gel.Silica type material has extensive hardness number scope, Neng Goubian
Flexibly formulate the hardness number of glue ring as needed in manufacturing process, the coefficient of friction of glue ring and wind wheel surface is adjusted with this, really
Protect the stable friction factor constant.
Preferably, the steel loop is made using stainless steel material.To improve intensity and corrosion resistance, extension is used
Life-span.
Preferably, the first steel loop, glue ring, wind wheel, glue ring, the second steel loop, spiral shell are followed successively by the output shaft from the inside to the outside
Mother, wherein the first steel loop is fixedly connected on output shaft.Be wind wheel both sides steel loop in, near the side of motor be the first steel
Ring, the side away from motor is the second steel loop so that the first steel loop is fixed, it is ensured that wind wheel can be clipped in the middle of two glue rings,
Cushioning ability is ensured by the glue ring of both sides, while increasing friction force, it is ensured that wind wheel rotates with output shaft synchronous.
The present invention compared with prior art, has the following advantages and advantages:
1st, water heater of the present invention brushless direct-current air blower, different spiral shells is used according to the different rotation direction of output shaft
Mother, even if there is relative displacement between wind wheel and output shaft, the displacement can cause that wind wheel more steps up with the connection of output shaft on the contrary
Gu, so as to solve the problems, such as to shake big, easy loosening when prior art wind wheel is rotated, realize the vibrations of reduction wind wheel, prevent certainly
The purpose that row loosens.Instant invention overcomes think wind wheel loose or dislocation in the prior art entirely due to frequently vibrations caused by
Technology prejudice, with prominent substantive distinguishing features and marked improvement.
2nd, water heater of the present invention brushless direct-current air blower, glue ring, the external diameter of steel loop are more than or equal to the two of output shaft external diameter
Times, glue ring, steel loop are much larger than output shaft, are used to increase the contact area between output shaft and wind wheel.There is glue the both sides of wind wheel
Ring and steel loop, enough strength supports are provided by steel loop, prevent wind wheel from being moved to output shaft both sides direction, while by glue ring
Increasing friction force, it is ensured that wind wheel rotates with output shaft synchronous.Additionally, glue ring can also provide elastic force for absorbing wind wheel along axle
To vibrations, damping noise reduction.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is the half-sectional structural representation of the specific embodiment of the invention;
Fig. 2 is the side view of the direction of arrow along Fig. 1.
Mark and corresponding parts title in accompanying drawing:
1- casings, 2- motors, 3- wind wheels, 4- glue rings, the steel loops of 5- first, 6- nuts, 7- output shafts, 8- controllers, 9-
Two steel loops.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
It is limitation of the invention.
Embodiment 1:
The brushless direct-current air blower of water heater as shown in Figures 1 and 2, including casing 1, the motor inside casing 1
2, wind wheel 3 is connected on the output shaft 7 of motor 2, also including glue ring 4, steel loop, the external diameter of the glue ring 4, steel loop is more than or equal to output
The twice of the external diameter of axle 7;The glue ring 4, steel loop is set on the output shaft 7 of motor 2, and glue ring 4 is located at the both sides of wind wheel 3, steel
Ring is located at glue ring 4 away from the side of wind wheel 3;The wind wheel 3 is fixed on the outer end of output shaft 7, nut 6 and output by nut 6
The axis collinear of axle 7, and when output shaft 7 is rotated clockwise, the nut 6 uses left-handed nut;When output shaft 7 turns counterclockwise
When dynamic, the nut 6 uses right-handed nut.Also include being arranged on the controller 8 inside casing 1, controller 8 is connected with motor 2,
Rotated for controlled motor 2.The glue ring 4 is made using silica gel.The steel loop is made using stainless steel material.Institute
State and be followed successively by from the inside to the outside on output shaft 7 first steel loop 5, glue ring 4, wind wheel 3, glue ring 4, the second steel loop 9, nut 6, wherein first
Steel loop 5 is fixedly connected on output shaft 7.The present apparatus includes casing 1, the motor 2 inside casing 1, the output shaft 7 of motor 2
Upper connection wind wheel 3, the wherein both sides of wind wheel 3 set gradually the glue ring 4, steel loop being set on output shaft 7, and glue ring 4, steel loop
Twice of the external diameter more than or equal to the external diameter of output shaft 7, be glue ring 4, steel loop much larger than output shaft 7, be used to increase output shaft 7 with
Contact area between wind wheel 3, while increasing friction force, makes wind wheel be rotated with output shaft synchronous.There is glue ring the both sides of wind wheel 3
4 and steel loop, enough strength supports are provided by steel loop, prevent wind wheel 3 from being moved to the both sides direction of output shaft 7.Simultaneously by glue
Ring 4 provides elastic force, for absorbing vibrations, the damping noise reduction vertically of wind wheel 3.The wind wheel 3 is fixed on output by nut 6
The axis collinear of the outer end of axle 7, nut and output shaft 7, and when output shaft 7 is rotated clockwise, the nut uses left-handed spiral shell
It is female;When output shaft 7 is rotated counterclockwise, the nut uses right-handed nut.Be by nut to wind wheel 3 and output shaft 7 it
Between connection fastened.Meanwhile, when motor 2 drives output shaft 7 to be rotated in the direction of the clock, then the nut is used
Left-handed nut, now, if wind wheel 3 has been less than the rotating speed of output shaft 7 by external condition interference rotating speed, wind wheel 3 is inverse with respect to output shaft 7
Hour hands rotate, and left-handed nut can be tightened on the contrary;Likewise, when motor 2 drives output shaft 7 to be rotated counterclockwise
When, then the nut uses right-handed nut, now, if wind wheel 3 has been less than the rotating speed of output shaft 7 by external condition interference rotating speed,
Wind wheel 3 turns clockwise with respect to output shaft 7, and right-handed nut can equally be tightened.Therefore it is different according to output shaft 7 in the present invention
Rotation direction and use different nuts, even if there is relative displacement between wind wheel 3 and output shaft 7, the displacement can be caused on the contrary
Wind wheel 3 is more fastened with the connection of output shaft 7, and big, easy loosening asking is shaken when wind wheel 3 in the prior art is rotated so as to solve
Topic, realizes that reducing wind wheel 3 shakes, prevents the purpose that voluntarily loosens.Taken off instant invention overcomes thinking that wind wheel 3 loosens in the prior art
Fall entirely due to frequently vibrations caused by technology prejudice, with prominent substantive distinguishing features and marked improvement.The both sides of wind wheel 3
Steel loop in, near motor 2 side be the first steel loop 5, away from motor 2 side be the second steel loop 9 so that the first steel loop 5
It is fixed, it is ensured that wind wheel 3 can be clipped in the middle of two glue rings 4, cushioning ability is ensured by the glue ring 4 of both sides, while increase rubs
Power is wiped, wind wheel is rotated with output shaft synchronous.
Above-described specific embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that and the foregoing is only specific embodiment of the invention, be not intended to limit the present invention
Protection domain, all any modification, equivalent substitution and improvements within the spirit and principles in the present invention, done etc. all should include
Within protection scope of the present invention.
Claims (5)
1. water heater brushless direct-current air blower, including casing (1), positioned at the internal motor (2) of casing (1), motor (2) it is defeated
Wind wheel (3) is connected on shaft (7), it is characterised in that also including glue ring (4), steel loop, the glue ring (4), the external diameter of steel loop are more than
Equal to the twice of output shaft (7) external diameter;The glue ring (4), steel loop are set on the output shaft of motor (2) (7), and glue ring
(4) positioned at wind wheel (3) both sides, steel loop is located at side of the glue ring (4) away from wind wheel (3);The wind wheel (3) is solid by nut (6)
The axis collinear of the outer end of output shaft (7), nut (6) and output shaft (7) is scheduled on, and when output shaft (7) is rotated clockwise, institute
State nut (6) and use left-handed nut;When output shaft (7) is rotated counterclockwise, the nut (6) uses right-handed nut.
2. water heater according to claim 1 brushless direct-current air blower, it is characterised in that also including being arranged on casing
(1) internal controller (8), controller (8) is connected with motor (2), for controlled motor (2) rotation.
3. water heater according to claim 1 brushless direct-current air blower, it is characterised in that the glue ring (4) uses silicon
Glue is made.
4. water heater according to claim 1 brushless direct-current air blower, it is characterised in that the steel loop uses stainless steel
Material is made.
5. water heater according to claim 1 brushless direct-current air blower, it is characterised in that on the output shaft (7) by
It is interior to outer to be followed successively by the first steel loop (5), glue ring (4), wind wheel (3), glue ring (4), the second steel loop (9), nut (6), wherein first
Steel loop (5) is fixedly connected on output shaft (7).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710193603.1A CN106762749A (en) | 2017-03-28 | 2017-03-28 | Water heater brushless direct-current air blower |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710193603.1A CN106762749A (en) | 2017-03-28 | 2017-03-28 | Water heater brushless direct-current air blower |
Publications (1)
Publication Number | Publication Date |
---|---|
CN106762749A true CN106762749A (en) | 2017-05-31 |
Family
ID=58967943
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201710193603.1A Pending CN106762749A (en) | 2017-03-28 | 2017-03-28 | Water heater brushless direct-current air blower |
Country Status (1)
Country | Link |
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CN (1) | CN106762749A (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009057918A (en) * | 2007-08-31 | 2009-03-19 | Max Co Ltd | Blower |
US20120146445A1 (en) * | 2010-12-13 | 2012-06-14 | Hitachi, Ltd. | Axial Flux Permanent Magnet Brushless Machine |
CN202811406U (en) * | 2012-03-20 | 2013-03-20 | 周和协 | An exhaust fan for a household gas water heater |
CN203753254U (en) * | 2014-01-22 | 2014-08-06 | 厦门市装载机有限公司 | Loader rear frame and cab connecting structure |
TWM500396U (en) * | 2014-08-08 | 2015-05-01 | Genese Intelligent Technology Co Ltd | Shock absorption structure of vane wheels |
CN104879312A (en) * | 2015-05-28 | 2015-09-02 | 深圳市猛龙电机有限公司 | Energy-saving FGHLK system air blower for gas stove and water heater |
CN105134629A (en) * | 2015-09-23 | 2015-12-09 | 广东美的制冷设备有限公司 | Fan and air purifier |
-
2017
- 2017-03-28 CN CN201710193603.1A patent/CN106762749A/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009057918A (en) * | 2007-08-31 | 2009-03-19 | Max Co Ltd | Blower |
US20120146445A1 (en) * | 2010-12-13 | 2012-06-14 | Hitachi, Ltd. | Axial Flux Permanent Magnet Brushless Machine |
CN202811406U (en) * | 2012-03-20 | 2013-03-20 | 周和协 | An exhaust fan for a household gas water heater |
CN203753254U (en) * | 2014-01-22 | 2014-08-06 | 厦门市装载机有限公司 | Loader rear frame and cab connecting structure |
TWM500396U (en) * | 2014-08-08 | 2015-05-01 | Genese Intelligent Technology Co Ltd | Shock absorption structure of vane wheels |
CN104879312A (en) * | 2015-05-28 | 2015-09-02 | 深圳市猛龙电机有限公司 | Energy-saving FGHLK system air blower for gas stove and water heater |
CN105134629A (en) * | 2015-09-23 | 2015-12-09 | 广东美的制冷设备有限公司 | Fan and air purifier |
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PB01 | Publication | ||
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RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170531 |
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RJ01 | Rejection of invention patent application after publication |