CN107346924B - Blower motor and blower - Google Patents
Blower motor and blower Download PDFInfo
- Publication number
- CN107346924B CN107346924B CN201710734235.7A CN201710734235A CN107346924B CN 107346924 B CN107346924 B CN 107346924B CN 201710734235 A CN201710734235 A CN 201710734235A CN 107346924 B CN107346924 B CN 107346924B
- Authority
- CN
- China
- Prior art keywords
- magnetic bearing
- radial
- rotor
- axial
- rotor shaft
- 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.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/09—Structural association with bearings with magnetic bearings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention relates to the technical field of hair dryers, in particular to a hair dryer motor adopting a magnetic suspension bearing. The invention discloses a blower motor, which comprises a stator and a rotor rotationally arranged in the stator, wherein the rotor comprises a rotor permanent magnet and a rotor shaft arranged along the axial direction, at least one radial magnetic bearing used for adjusting the radial position of the rotor shaft and at least one axial magnetic bearing used for adjusting the axial position of the rotor shaft are sleeved on the rotor shaft, the rotor permanent magnet is arranged at the end part close to the rotor shaft, and the radial magnetic bearing and the axial magnetic bearing are arranged at one end of the rotor shaft, which extends outwards from the rotor permanent magnet. The hair drier of the invention comprises the hair drier motor. This hair-dryer motor and hair-dryer has solved current motor and has received the unable problem that improves the rotational speed of bearing restriction, and it not only operates reliably, but also has greatly prolonged life, has improved work efficiency.
Description
Technical Field
The invention relates to the technical field of hair dryers, in particular to a hair dryer motor adopting a magnetic suspension bearing and a hair dryer with the hair dryer motor.
Background
The hair drier is mainly used for drying and shaping hair, but also can be used for local drying, heating and physical therapy in laboratories, physical therapy rooms, industrial production, art designing and the like, and is formed by combining a group of electric heating wires and a high-rotating-speed small fan. When the fan is electrified, the heating wire can generate heat, and the air blown out by the fan passes through the heating wire and is changed into hot air.
It can be classified into an ac series excitation type, an ac shaded pole type and a dc permanent magnet type according to the type of motor used. The series-excited hair drier has the advantages of large starting torque and high rotating speed, and is suitable for manufacturing high-power hair dryers; the disadvantage is that the noise is high and the commutator has a certain interference to the telecommunication equipment. The shaded pole type hair drier has the advantages of low noise, long service life and no interference to telecommunication equipment; the disadvantages are low rotation speed, poor starting performance and heavy weight.
In the prior art, a motor generally comprises a machine shell, permanent magnetic steel, a carbon brush, a rotor and a rotor winding, when the motor operates, high-speed friction can be generated between the carbon brush and a commutator, and the rotor winding continuously switches current, so that sparks are easily generated between the carbon brush and the commutator, and if the rotating speed is too high, the carbon brush and the commutator are seriously abraded, so that the service life of the product is influenced, and even the product is quickly burnt. If adopt conventional brushless motor as hair-dryer motor, under high rotational speed, its bearing leads to energy loss, temperature rising because of mechanical friction to cause the bearing to damage, make overhaul and change more frequently, lead to its unable high rotational speed that can bear of current brushless motor, make the rotational speed can only accomplish about 80000RPM to the utmost.
Disclosure of Invention
The invention aims to provide a blower motor and a blower, which solve the problem that the rotating speed of the existing motor cannot be increased due to the limitation of a bearing, so that the maximum rotating speed of the motor can reach 150000RPM, the blower motor not only runs reliably, but also greatly prolongs the service life and improves the working efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
in one aspect, the present invention provides a blower motor, including a stator, a rotor rotatably disposed in the stator, the rotor including a rotor permanent magnet and a rotor shaft disposed along an axial direction, the rotor shaft being sleeved with at least one radial magnetic bearing for adjusting a radial position of the rotor shaft and at least one axial magnetic bearing for adjusting an axial position of the rotor shaft, wherein the rotor permanent magnet is disposed at an end portion close to the rotor shaft, and the radial magnetic bearing and the axial magnetic bearing are disposed at an end of the rotor shaft extending outward from the rotor permanent magnet.
The rotor shaft is further provided with an impeller, the impeller is arranged at the other end, far away from the rotor permanent magnet, of the rotor shaft, and the radial magnetic bearing and the axial magnetic bearing are located between the impeller and the rotor permanent magnet.
And the axial magnetic bearing is integrally provided with an axial position sensor for monitoring the position of the rotor shaft in the axial direction.
The magnetic bearing device also comprises at least one radial position sensor for monitoring the position of the rotor shaft in the radial direction, each radial position sensor is arranged corresponding to one radial magnetic bearing, and the radial position sensor is connected with a motor control board.
And a fixing plate for fixing the radial position sensor is arranged on the periphery of the radial position sensor.
The two axial magnetic bearings are respectively arranged between the two radial magnetic bearings, and the two axial magnetic bearings are arranged at intervals.
The two axial magnetic bearings are an upper axial magnetic bearing and a lower axial magnetic bearing respectively.
The number of the radial position sensors is two, and the two radial position sensors are respectively arranged at the outer sides of the two radial magnetic bearings.
The two radial magnetic bearings are an upper radial magnetic bearing and a lower radial magnetic bearing respectively, the two radial position sensors are an upper radial position sensor and a lower radial position sensor respectively, the upper radial position sensor corresponds to the upper radial magnetic bearing, and the lower radial position sensor corresponds to the lower radial magnetic bearing.
Wherein the blower motor is provided with a power supply for separately controlling the axial magnetic bearing and the radial magnetic bearing.
In another aspect, the present invention provides a blower having the blower motor.
The invention has the beneficial effects that:
the blower motor adopts the magnetic suspension principle, utilizes the two radial magnetic bearings to realize radial position adjustment, and utilizes the two axial magnetic bearings to realize axial position adjustment, so that the position control of the rotor shaft can be accurately and reliably realized, and the rotor shaft does not contact with the radial magnetic bearings and the axial magnetic bearings to avoid abrasion in the rotating process, thereby being well adapted to the high rotating speed requirement of a blower, overcoming the problem that the rotating speed of the existing motor cannot be increased due to the limitation of the bearings, having reliable operation, greatly prolonging the service life and improving the working efficiency.
Drawings
Figure 1 is a schematic cross-sectional view of a blower motor of the present invention.
In the figure: 1-motor control board; 2-a rotor; 3-a stator; 4-an upper radial position sensor; 5-upper radial magnetic bearing; 6-upper axial magnetic bearing; 7-lower axial magnetic bearing; 8-lower radial magnetic bearing; 9-lower radial position sensor; 10-an impeller; 11-rotor shaft.
Detailed Description
The traditional motor is composed of a stator and a rotor, the stator and the rotor are connected through a mechanical bearing or are in mechanical contact, so that mechanical friction exists in the moving process of the rotor, moving parts are abraded, mechanical vibration and noise are generated, the parts are heated, the performance of a lubricant is deteriorated, the air gap of the motor is seriously uneven, a winding generates heat, the temperature rise is increased, the efficiency of the motor is reduced, and the service life of the motor is shortened.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1, a blower motor provided in an embodiment of the present invention includes a stator 3 and a rotor 2 rotatably disposed in the stator 3, where the rotor 2 includes a rotor permanent magnet and a rotor shaft 11 extending along an axial direction of the rotor permanent magnet, the rotor permanent magnet is disposed near one end of the rotor shaft 11, at least one radial magnetic bearing for adjusting a radial position of the rotating shaft 11 and at least one axial magnetic bearing for adjusting an axial position of the rotating shaft 11 are sleeved on a portion of the rotor shaft 11 extending out of the stator 3, and the number of the radial magnetic bearings and the number of the axial magnetic bearings can be selected according to different requirements of the motor.
The magnetic suspension bearings such as the radial magnetic bearing and the axial magnetic bearing are arranged on the rotor shaft 11 of the blower motor, and the rotor is suspended under the action of magnetic force, so that the rotor is not in mechanical contact with any other component, the motor has no mechanical wear, the rotor can run to the rotating speed of 150000RPM, and the blower motor has the advantages of no mechanical wear, low energy consumption, low noise, long service life, no need of lubrication, no oil pollution and the like.
Specifically, the rotor shaft 11 is further provided with an impeller 10, the impeller 10 is disposed on the other end of the rotor shaft 11 away from the rotor permanent magnet, and the radial magnetic bearing and the axial magnetic bearing are located between the impeller 10 and the rotor permanent magnet.
The axial magnetic bearings are provided with axial position sensors for monitoring the axial positions of the rotor shafts. In the present embodiment, two axial magnetic bearings are provided, which are an upper axial magnetic bearing 6 and a lower axial magnetic bearing 7, respectively. The number of the radial magnetic bearings is two, and the two radial magnetic bearings are an upper radial magnetic bearing 5 and a lower radial magnetic bearing 8 respectively. The two axial magnetic bearings are respectively arranged between the two radial magnetic bearings, and the two axial magnetic bearings are arranged at intervals.
The hair dryer also comprises at least one radial position sensor for monitoring the position of the rotor shaft 11 in the radial direction, wherein each radial position sensor is arranged corresponding to one radial magnetic bearing, and the radial position sensor is connected with the motor control board 1. And a fixing plate for fixing the radial position sensor is arranged on the periphery of the radial position sensor. In this embodiment, the number of the radial position sensors is two, the two radial position sensors are an upper radial position sensor 4 and a lower radial position sensor 9, respectively, the upper radial position sensor 4 corresponds to the upper radial magnetic bearing 5, the lower radial position sensor 9 corresponds to the lower radial magnetic bearing 8, and the two radial position sensors are respectively disposed at the outer sides of the two radial magnetic bearings.
The magnetic suspension bearings of the blower motor are controlled by matching the motor control board, when the motor is started, the position of a rotor shaft is detected by the radial position sensor and the axial position sensor in the axial magnetic bearing, a deviation signal of the rotating shaft is transmitted to the controller of the motor control board, the controller performs proper operation on the position deviation signals detected by the radial position sensor and the axial position sensor, the operated control signals are converted into control current through the motor power amplifier, the control current generates magnetic force in the magnetic suspension bearings, and therefore the rotor shaft is driven to correct the position, the rotor shaft can quickly return to a reference position, and the motor starts to operate after the rotor shaft is finally determined to reach required positions in the axial direction and the radial direction respectively.
When this hair-dryer motor stall, the rotor still can keep rotatory certain time owing to rotatory inertia after the outage, if the magnetic suspension bearing outage this moment, the rotor loses balance, can lead to the motor to damage, so, the motor need set up to be after the complete stall of rotor, the power of disconnection magnetic suspension bearing coil on the magnetic suspension bearing again, preferred embodiment, the motor sets up a charging source in order to supply power for the coil of magnetic suspension bearing, avoids the motor outage back rotor to lose balance to damage the motor, this charging source lasts to charge when the motor starts.
When the blower motor is used, the electromagnetic parameters can be adjusted through the controller, so that the rotor has enough magnetic tension in the axial direction and the radial direction, the position of the rotor cannot be changed due to the change of load, and the normal operation of the motor is ensured.
Preferably, in this embodiment, both the radial magnetic bearing and the axial magnetic bearing are made of metal materials, and preferably, high-performance metal materials can be used to reduce the volume of the bearing, reduce noise and improve the efficiency of the motor; meanwhile, the air duct is designed as a cooling air duct, and the bearing is cooled when the impeller 12 rotates, so that the service life of the bearing is prolonged.
In this embodiment, the radial position sensor is fixed to a dedicated fixing plate, and a high-precision positioning structure is provided on the fixing plate, so that the radial position sensor detects a small positional deviation of the rotor with high precision.
The blower motor is a brand new blower motor structure and is applied to a blower, so that the blower has the advantages of high rotating speed, low noise and long service life, and the air output of the blower is greatly improved.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (6)
1. A blower motor comprises a stator (3) and a rotor (2) rotatably arranged in the stator (3), and is characterized in that the rotor (2) comprises a rotor permanent magnet and a rotor shaft arranged along the axial direction, at least one radial magnetic bearing used for adjusting the radial position of the rotor shaft (11) and at least one axial magnetic bearing used for adjusting the axial position of the rotor shaft (11) are sleeved on the rotor shaft (11), wherein the rotor permanent magnet is arranged at the end part close to the rotor shaft (11), the radial magnetic bearing and the axial magnetic bearing are arranged at one end of the rotor shaft (11) extending outwards from the rotor permanent magnet, an impeller (10) is further arranged on the rotor shaft (11), and the impeller (10) is arranged at the other end far away from the rotor permanent magnet on the rotor shaft (11), the radial magnetic bearing and the axial magnetic bearing are positioned between the impeller (10) and the rotor permanent magnet, and the radial magnetic bearing and the axial magnetic bearing are cooled through a cooling air duct when the impeller (10) rotates;
the two radial magnetic bearings are an upper radial magnetic bearing (5) and a lower radial magnetic bearing (8), the two axial magnetic bearings are an upper axial magnetic bearing (6) and a lower axial magnetic bearing (7), and the upper axial magnetic bearing (6) and the lower axial magnetic bearing (7) are arranged at intervals and are positioned between the upper radial magnetic bearing (5) and the lower radial magnetic bearing (8).
2. The blower motor of claim 1, wherein each of the axial magnetic bearings is integrally provided with an axial position sensor for monitoring the axial position of the rotor shaft.
3. The blower motor according to claim 1 or 2, further comprising at least one radial position sensor for monitoring the position of the rotor shaft (11) in the radial direction, said radial position sensor being connected to the motor control board (1);
the number of the radial position sensors is two, the two radial position sensors are an upper radial position sensor (4) and a lower radial position sensor (9) respectively, the upper radial position sensor (4) corresponds to the upper radial magnetic bearing (5), the lower radial position sensor (9) corresponds to the lower radial magnetic bearing (8), and the two radial position sensors are arranged on the outer sides of the two radial magnetic bearings respectively.
4. The blower motor of claim 3, wherein the radial position sensor is provided at its outer periphery with a fixing plate for fixing the radial position sensor.
5. The blower motor of claim 1, wherein the blower motor is provided with a power source that separately controls the axial magnetic bearing and the radial magnetic bearing.
6. A hair dryer having a hair dryer motor as claimed in any one of claims 1 to 5.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710734235.7A CN107346924B (en) | 2017-08-24 | 2017-08-24 | Blower motor and blower |
| PCT/CN2017/109024 WO2019037265A1 (en) | 2017-08-24 | 2017-11-02 | Hair dryer motor and hair dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710734235.7A CN107346924B (en) | 2017-08-24 | 2017-08-24 | Blower motor and blower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107346924A CN107346924A (en) | 2017-11-14 |
| CN107346924B true CN107346924B (en) | 2021-12-07 |
Family
ID=60257574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710734235.7A Active CN107346924B (en) | 2017-08-24 | 2017-08-24 | Blower motor and blower |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107346924B (en) |
| WO (1) | WO2019037265A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1666026A (en) * | 2003-07-04 | 2005-09-07 | 三菱电机株式会社 | Magnetic bearing device |
| CN102979816A (en) * | 2011-09-05 | 2013-03-20 | 株式会社安川电机 | Main shaft device |
| CN106505780A (en) * | 2016-12-15 | 2017-03-15 | 南通金驰机电有限公司 | A kind of magnetic suspension permanent magnet direct-drive high-speed motor |
| CN206397654U (en) * | 2016-12-24 | 2017-08-11 | 重庆宙盾新能源技术开发有限公司 | Magnetic suspending wind turbine generator group |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100401096B1 (en) * | 2000-06-24 | 2003-10-10 | 삼성전기주식회사 | Thrust magnetic bearing motor |
| KR20040009157A (en) * | 2002-07-22 | 2004-01-31 | 삼성전기주식회사 | Motor having thrust magnetic bearing |
| CN1945940A (en) * | 2006-07-18 | 2007-04-11 | 沈阳工业大学 | Integrated permanent magnet rotor magnetic suspension high speed motor |
| JP2008045586A (en) * | 2006-08-11 | 2008-02-28 | Ntn Corp | Motor integrated magnetic bearing device |
| DE102008062679A1 (en) * | 2008-12-17 | 2010-06-24 | Minebea Co., Ltd. | Fluid dynamic storage system |
| CN103023184A (en) * | 2011-09-20 | 2013-04-03 | 德昌电机(深圳)有限公司 | High-speed airflow generating device and brushless motor thereof |
| CN202273889U (en) * | 2011-10-13 | 2012-06-13 | 山东科技大学 | Magnetic levitation flywheel centrifugal blower |
| CN105363585A (en) * | 2015-12-08 | 2016-03-02 | 中冶焦耐工程技术有限公司 | High-speed atomizer based on magnetic suspension bearing permanent magnet synchronous motor |
| CN205217182U (en) * | 2015-12-08 | 2016-05-11 | 中冶焦耐工程技术有限公司 | High -speed atomizer based on magnetic suspension bearing PMSM |
| CN207353983U (en) * | 2017-08-24 | 2018-05-11 | 莱克电气股份有限公司 | A kind of blower motor and hair-dryer |
| CN207353982U (en) * | 2017-08-24 | 2018-05-11 | 莱克电气股份有限公司 | A kind of blower motor and hair-dryer |
| CN107332389B (en) * | 2017-08-24 | 2021-09-14 | 莱克电气股份有限公司 | Blower motor and blower |
-
2017
- 2017-08-24 CN CN201710734235.7A patent/CN107346924B/en active Active
- 2017-11-02 WO PCT/CN2017/109024 patent/WO2019037265A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1666026A (en) * | 2003-07-04 | 2005-09-07 | 三菱电机株式会社 | Magnetic bearing device |
| CN102979816A (en) * | 2011-09-05 | 2013-03-20 | 株式会社安川电机 | Main shaft device |
| CN106505780A (en) * | 2016-12-15 | 2017-03-15 | 南通金驰机电有限公司 | A kind of magnetic suspension permanent magnet direct-drive high-speed motor |
| CN206397654U (en) * | 2016-12-24 | 2017-08-11 | 重庆宙盾新能源技术开发有限公司 | Magnetic suspending wind turbine generator group |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019037265A1 (en) | 2019-02-28 |
| CN107346924A (en) | 2017-11-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107332389B (en) | Blower motor and blower | |
| CN104993637A (en) | Magnetic levitation induction motor electric bicycle driving system | |
| CN107516990B (en) | Dust collector motor and dust collector | |
| CN207353982U (en) | A kind of blower motor and hair-dryer | |
| CN207354032U (en) | A kind of motor of dust collector and dust catcher | |
| CN107346924B (en) | Blower motor and blower | |
| CN207353983U (en) | A kind of blower motor and hair-dryer | |
| CN107370322B (en) | Dust collector motor and dust collector | |
| CN106300796B (en) | A kind of speed regulating motor | |
| CN107370321B (en) | A kind of motor of dust collector and dust catcher | |
| JP2000502875A (en) | Electric motor | |
| CN207354031U (en) | A kind of motor of dust collector and dust catcher | |
| CN208479314U (en) | Electronic ducted-fan blower | |
| CN107147265B (en) | Server radiator fan | |
| CN207475377U (en) | A kind of motor of dust collector and dust catcher | |
| CN102055277A (en) | Non-axis motor | |
| CN101202522A (en) | Magnetic suspension electric motor without bearings | |
| CN208738978U (en) | A kind of brushless motor | |
| CN208835976U (en) | A kind of brushless single phase motor | |
| CN207612158U (en) | A kind of New Type Alternating Current | |
| CN106887940A (en) | A kind of self-cooled permanent-magnet eddy current Flexible Transmission speed regulator | |
| CN110583813A (en) | Electromagnetic water-removing machine with variable magnetic field | |
| CN202679185U (en) | A disc switch reluctance motor with double power | |
| CN111030410A (en) | Novel permanent magnet synchronous motor | |
| CN205114782U (en) | Magnetic suspension bearing elevator traction machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |