CN109268940B - Air conditioner and fan thereof - Google Patents
Air conditioner and fan thereof Download PDFInfo
- Publication number
- CN109268940B CN109268940B CN201811297197.4A CN201811297197A CN109268940B CN 109268940 B CN109268940 B CN 109268940B CN 201811297197 A CN201811297197 A CN 201811297197A CN 109268940 B CN109268940 B CN 109268940B
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- China
- Prior art keywords
- fan
- driving motor
- transmission part
- fan blade
- fan blades
- 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.)
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Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 46
- 238000005096 rolling process Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 11
- 238000012423 maintenance Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
- F24F1/0033—Indoor units, e.g. fan coil units characterised by fans having two or more fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/081—Air-flow control members, e.g. louvres, grilles, flaps or guide plates for guiding air around a curve
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to the technical field of daily electrical appliances, in particular to an air conditioner and a fan thereof. The fan comprises a shell, a driving motor, a transmission part and a plurality of fan blades, wherein the driving motor is arranged in the shell; the fan blades are arranged in the shell at intervals, and at least one fan blade is connected with the driving motor through the transmission part, so that the driving motor drives the fan blades to rotate. The fan provided by the invention has the advantages of relatively fewer parts, lower assembly difficulty, lower production and maintenance cost and lower noise generated in the working process.
Description
Technical Field
The invention relates to the technical field of daily electrical appliances, in particular to an air conditioner and a fan thereof.
Background
Along with the gradual improvement of the living standard of people, more and more household appliances enter the lives of people. Taking the air conditioner as an example, the household air conditioner generally comprises a hanging type and a cabinet type, in order to enable the cabinet type air conditioner to have the function of air outlet from top to bottom, a set of centrifugal fan system is installed at the upper, middle and lower positions of the cabinet type air conditioner respectively, each set of centrifugal fan system comprises an independent motor, fan blades and other parts, the fan blades are directly connected with the motor, the parts of the whole fan are too many, the assembly difficulty is high, the cost is high, noise generated by a plurality of motors is high, and the maintenance cost is high.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the fan has the advantages that more parts are contained in the fan, the assembly difficulty is high, the production and maintenance cost is high, the noise generated in the working process is high, and the user experience is poor.
(II) technical scheme
In order to achieve the above technical problem, a first aspect of the present invention provides a fan, including: a housing;
A drive motor mounted into the housing;
a transmission part;
the fan blades are arranged in the shell at intervals, and at least one fan blade is connected with the driving motor through the transmission part, so that the driving motor drives the fan blades to rotate.
Optionally, the driving motor is provided with one, and a plurality of fan blades are all connected with the driving motor through the transmission part.
Optionally, the driving motor is disposed in the middle of the casing, and the fan blades are disposed on two opposite sides of the driving motor along the length direction of the casing.
Optionally, the driving motor includes a body and a double-sided driving shaft, the double-sided driving shaft cooperates with the body, the double-sided driving shaft extends from opposite sides of the body, one end of the double-sided driving shaft is connected with the fan blade, and the other end of the double-sided driving shaft cooperates with the transmission part.
Optionally, the transmission part comprises a belt wheel and a belt which are matched, and the belt wheel is arranged on the driving motor and the fan blade.
Optionally, the pulley has a mounting groove, and the belt is disposed in the mounting groove.
Optionally, the transmission part comprises a sprocket and a chain which are matched, and the sprocket is arranged on the driving motor and the fan blade.
Optionally, the fan blade is provided with a driven shaft, two ends of the driven shaft are respectively connected with the fan blade and the transmission part, and the middle part of the driven shaft is installed on the casing through a rolling bearing.
Optionally, a rotation stopping gasket is arranged on the driven shaft, and the rotation stopping gasket is in limit fit with the fan blade in the axial direction of the driven shaft.
The second aspect of the invention also provides an air conditioner comprising the fan provided by any one of the above.
Advantageous effects
In the fan provided by the invention, the plurality of fan blades are arranged in the shell at intervals, and at least one fan blade is connected with the driving motor through the transmission part, so that the driving fan can drive the plurality of fan blades to rotate, and the driving motor is not required to be configured for the fan blades which are in transmission connection with the driving motor independently, so that the number of the driving motor in the fan and the parts matched with the driving motor can be reduced, and the assembly difficulty and the production and maintenance cost of the fan are reduced to a certain extent; in addition, because the number of the driving motors is reduced, the noise generated by the fan in the working process is correspondingly reduced, and the user experience is better.
Drawings
The advantages of the foregoing and/or additional aspects of the present invention will become apparent and readily appreciated from the description of the embodiments, taken in conjunction with the accompanying drawings, wherein:
FIG. 1 is an exploded schematic view of a blower provided by the present invention;
FIG. 2 is a schematic view of a blower provided by the present invention;
FIG. 3 is a cross-sectional view of the structure shown in FIG. 2 taken in the A-A direction;
FIG. 4 is an enlarged view of part I of the structure shown in FIG. 3;
fig. 5 is an enlarged view of part II of the structure shown in fig. 3.
Reference numerals
1-A shell;
11-an air outlet;
12-cover plate;
13, a diversion cover;
2-driving a motor;
21-a body;
22-a double sided drive shaft;
3-a transmission part;
31-pulleys;
311-mounting slots;
32-a belt;
4-fan blades;
41-driven shaft;
42-nesting;
5-a nut with a pad;
6-check ring;
7-a rotation stopping gasket;
8-a motor mounting plate;
81-a motor pressing plate;
9-rolling bearings.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present invention and features in the embodiments may be combined with each other.
As shown in fig. 1 and 2, the invention provides a fan, which has relatively fewer parts, relatively simple assembly work, lower production and maintenance cost and lower noise generated in the working process, and based on the fan, the invention also provides an air conditioner, which can be a cabinet air conditioner. The fan includes casing 1, driving motor 2, drive portion 3 and a plurality of fan blade 4, in order to make the fan possess the purpose of following upper and lower both sides air-out, preferably, as shown in fig. 2, both sides all can be provided with air outlet 11 about casing 1, correspondingly, can be formed with the wind channel in the casing 1, the concrete arrangement and the extending direction in wind channel can be determined according to actual conditions, a plurality of fan blades 4 all correspond the setting with the wind channel, and wind channel and a plurality of air outlet 11 all communicate for the produced air current of a plurality of fan blades 4 under driving motor 2's drive can blow out from a plurality of air outlets 11 respectively. Specifically, the casing 1 may be made of plastic or metal material, specifically may be made by injection molding or die casting, etc., and mounting bases corresponding to different components may be formed at different positions on the casing 1, the driving motor 2 may be selected according to actual requirements, the driving motor 2 may be mounted on the motor mounting plate 8, and then mounted on the casing 1 through the motor mounting plate 8, and a motor pressing plate 81 may be further disposed on a side of the driving motor 2 facing away from the motor mounting plate 8, so as to further fix a working position of the motor; the transmission part 3 can realize transmission effect by adopting modes such as belt transmission, gear transmission or chain transmission, the fan blades 4 can be made of plastic or metal materials, and the structures and the sizes of the fan blades 4 can be the same. At least one fan blade 4 among the plurality of fan blades 4 is connected with the driving motor 2 through the transmission part 3, so that in the spare parts and assembly process of the fan provided by the invention, the driving motor 2 does not need to be independently arranged for the fan blade 4, the number of the driving motor 2 arranged in the fan can be reduced, the number of parts used for being matched with the driving motor 2 can be correspondingly reduced, the purpose of reducing the assembly difficulty of the fan is achieved, and correspondingly, the production and maintenance cost of the whole fan can be correspondingly reduced; meanwhile, the quantity of the driving motors 2 is reduced, so that the noise generation amount in the working process of the fan can be reduced to a certain extent. Specifically, one driving motor 2 may drive two, three or more fan blades 4 at the same time, which is not limited herein. In addition, the casing 1 may be further provided with a cover plate 12, and the cover plate 12 is hermetically connected with the casing 1 to protect components installed in the casing 1 and form a closed gas channel with the air duct.
Further, only one driving motor 2 can be arranged in the fan, and a plurality of fan blades 4 can be connected with the driving motor 2 through the transmission part 3, so that the difficulty of fan assembly work and the noise generation amount in the working process of the fan can be reduced to the greatest extent. The fan can be internally provided with three fan blades 4, the upper and lower air outlet functions of the fan can be maximally embodied, the fan blades 4 can be respectively arranged at the upper part, the middle part and the lower part of the shell 1 and are respectively communicated with air outlets 11 positioned at the upper side and the lower side of the fan, the distribution condition of cold and hot air in a sealed space can be considered, and the air duct shape, the layout and other modes can be designed, for example, a guide cover 13 can be additionally arranged in the shell 1, so that air flow generated by the fan blades 4 arranged in the middle part of the shell 1 can be converged into the air outlet 11 at the upper side of the shell 1, thereby increasing the air quantity of the air outlet 11 at the upper side and improving the working efficiency of the cabinet air conditioner. Further, the plurality of fan blades 4 can be connected with the same driving motor 2 through the transmission part 3, and specifically, the transmission parts 3 for transmitting and connecting different fan blades 4 can have the same or different structures; meanwhile, the driving shaft of the driving motor 2 may extend from only one side of the driving motor, and of course, the driving shaft of the driving motor 2 may also extend from two opposite sides of the driving motor to respectively provide driving forces for different fan blades 4.
In order to simplify the structure of the transmission part 3 and the span of the transmission connection relationship, preferably, as shown in fig. 3, the driving motor 2 may be disposed in the middle of the casing 1, and the plurality of fan blades 4 may be disposed on two opposite sides of the driving motor 2 along the length of the casing 1, so as to shorten the overall distance between the plurality of fan blades 4 and the driving motor 2, further simplify the overall structure of the transmission part 3 and the distance of the required transmission connection, and the transmission part 3 and the fan blades 4 may be in one-to-one correspondence, or the plurality of fan blades 4 may be connected with the driving motor 2 through the same transmission part 3. It should be noted that, the length direction of the casing 1 may be the direction F in fig. 2; in addition, the plurality of fan blades 4 are distributed on both sides of the driving motor 2 along the length direction, which does not mean that the plurality of fan blades 4 are necessarily arranged in a straight line along the length direction, but means only the approximate arrangement position thereof.
In order to further reduce the number of the transmission parts 3, alternatively, as shown in fig. 4, the driving motor 2 may include a body 21 and a double-sided driving shaft 22, the double-sided driving shaft 22 being engaged with the body 21, and the double-sided driving shaft 22 protruding from opposite sides of the body 21 such that opposite ends of the double-sided driving shaft 22 may be connected to parts, specifically, one of the opposite ends of the double-sided driving shaft 22 is connected to the fan blade 4 such that the driving motor 2 may directly drive the fan blade 4 to rotate; the other end of the double-sided driving shaft 22 can be matched with the transmission part 3, so that the driving motor 2 can also provide power for other fan blades 4, the number of the transmission parts 3 can be further reduced, the overall structure of the fan is further simplified, the production and maintenance cost is reduced, the working noise is reduced, and the user experience is improved.
Alternatively, the transmission part 3 may include a belt wheel 31 and a belt 32, and the driving motor 2 and the fan blade 4 may be provided with the belt wheel 31, and the belt wheel 31 is used to cooperate with the belt 32, so that the driving motor 2 can drive the fan blade 4 to rotate. The belt transmission structure is simple and reliable, the installation and maintenance are convenient, and the cost is low; meanwhile, in the transmission working process, the belt transmission structure can absorb certain impact and vibration through the flexible belt 32, and noise is hardly generated in the working process, so that the user experience is further improved. Specifically, the belt wheel 31 may be mounted on the driving motor 2 and the fan blade 4 by means of nuts and other components, the belt 32 may be a flat belt, a triangular belt or a round belt, and accordingly, the specific structure of the belt wheel 31 may be set according to the specific structure of the belt 32, so that the driving motor 2 drives the driving fan blade 4 to rotate under the cooperation of the belt 32 and the belt wheel 31. More specifically, in order to prevent the belt 32 from slipping, etc., a manner of adjusting the tension or increasing the lubrication oil, etc. may be employed. Preferably, the belt wheel 31 can be provided with a mounting groove 311, and the belt 32 is mounted in the mounting groove 311, so that the connection reliability between the belt 32 and the belt wheel 31 can be further improved, and the normal operation of the fan is ensured. In consideration of the loading condition of the fan blade 4, the belt 32 may alternatively be a v-belt 32, and accordingly, the shape of the mounting groove 311 may also be adapted to the shape of the belt 32 with such a structure. Further, as shown in fig. 3, 4 and 5, for the pulleys 31 with different mounting positions, the number of the mounting slots 311 arranged on the pulleys may also be different, for example, a plurality of mounting slots 311 may be arranged on the pulleys 31 mounted on the driving motor 2, so that the plurality of mounting slots 311 may be respectively matched with a plurality of belts 32 to further drive a plurality of fan blades 4 to rotate; the belt wheel 31 mounted on the fan blade 4 may be provided with a mounting groove 311, and the mounting groove 311 may be engaged with only one belt 32, so as to drive the fan blade 4 engaged with the belt wheel 31 to rotate.
Optionally, the transmission part 3 may further include a sprocket and a chain (not shown in the figure), and the driving motor 2 and the fan blade 4 may be mounted with sprockets, and the purpose of connecting the driving motor 2 and the fan blade 4 may be achieved under the cooperation of the chain. The transmission part 3 with the structure can not generate elastic sliding and slipping phenomena in the working process so as to ensure the normal and orderly work of a plurality of fan blades 4, and the chain transmission mechanism has relatively high efficiency and strong load and overload capacity. Specifically, the sprocket wheels can be respectively installed on the driving motor 2 and the wind vane 4 through connecting pieces such as nuts; alternatively, the sprocket may be directly fixed to the driving motor 2 and the wind vane 4 by welding or the like. Accordingly, the specific model and size of the sprocket and chain can be determined based on the actual configuration of the fan.
Further, the fan blade 4 is provided with a driven shaft 41, two ends of the driven shaft 41 can be respectively connected with the fan blade 4 and the transmission part 3, and in order to improve the running stability of the fan blade 4, preferably, the middle part of the driven shaft 41 can be mounted on the casing 1 through a rolling bearing 9. Specifically, as shown in fig. 5, the driven shaft 41 may be sleeved with a rolling bearing 9, and the rolling bearing 9 may provide a more reliable supporting effect for the fan blade 4, and may not adversely affect the rotation of the driven shaft 41. The fan blade 4 can be fixedly connected to one end of the driven shaft 41 by means of a nest 42, and correspondingly, the other end of the driven shaft 41 can be connected with the transmission part 3 through a connecting piece such as a nut. In order to further prevent the position of the fan blade 4 from moving during the operation of the fan, preferably, a retainer ring 6 may be further disposed on the outer side of the nest 42 in the axial direction of the driven shaft 41, so as to further prevent the fan blade 4 from being displaced along the axial direction during the operation of the fan, thereby affecting the normal operation of the fan. Preferably, the driven shaft 41 can be further provided with a rotation stopping gasket 7, and the rotation stopping gasket can be installed on the outer side of the fan blade 4 of the driven shaft 41 through a nut with a gasket 5, so that the position of the fan blade 4 is further prevented from changing during the working process of the fan. In addition, as shown in fig. 4, in the case where the driving motor 2 is provided with the double-sided driving shaft 22, the end of the double-sided driving shaft 22 connected to the fan blade 4 may also be provided with the rotation stop washer 7 and the nut with washer 5, so that the fan blade 4 shifts during operation to cause a safety risk to the fan. In addition, rolling bearings 9 may be disposed between the double-sided drive shaft 22 (or single-sided drive shaft) and the driven shaft 41 of the drive motor 2 and the casing 1 to further improve the operational stability of the entire fan, and in order to prevent the rolling bearings 9 from being displaced in the foregoing axial direction during operation, the outside of each rolling bearing 9 may be provided with a retainer ring 6.
In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the communication may be direct or indirect through an intermediate medium, or may be internal to two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (9)
1.A blower, comprising:
a housing (1);
a drive motor (2), the drive motor (2) being mounted into the housing (1);
A transmission unit (3);
The fan blades (4) are arranged in the machine shell (1) at intervals, and at least one fan blade (4) is connected with the driving motor (2) through the transmission part (3) so that the driving motor (2) drives the fan blades (4) to rotate;
the driving motor (2) comprises a body (21) and a double-sided driving shaft (22), the double-sided driving shaft (22) is matched with the body (21), the double-sided driving shaft (22) extends out of two opposite sides of the body (21), one end of the double-sided driving shaft (22) is connected with the fan blade (4), and the other end of the double-sided driving shaft (22) extends out of the machine shell (1) to be matched with the transmission part (3).
2. Fan according to claim 1, characterized in that the drive motor (2) is provided with one, a plurality of fan blades (4) are connected with the drive motor (2) through the transmission part (3).
3. The fan according to claim 2, wherein the driving motor (2) is disposed in the middle of the housing (1), and the fan blades (4) are disposed on two opposite sides of the driving motor (2) along the length direction of the housing (1).
4. A fan according to claim 1, characterized in that the transmission part (3) comprises a pulley (31) and a belt (32) which are matched, and the pulley (31) is arranged on the driving motor (2) and the fan blade (4).
5. The fan according to claim 4, characterized in that the pulley (31) has a mounting groove (311), the belt (32) being arranged in the mounting groove (311).
6. A fan according to claim 1, wherein the transmission part (3) comprises a sprocket and a chain which are matched, and the sprocket is arranged on the driving motor (2) and the fan blade (4).
7. Fan according to claim 1, characterized in that the fan blade (4) is provided with a driven shaft (41), both ends of the driven shaft (41) are respectively connected with the fan blade (4) and the transmission part (3), and the middle part of the driven shaft (41) is mounted on the casing (1) through a rolling bearing (9).
8. Fan according to claim 7, characterized in that the driven shaft (41) is provided with a rotation stopping gasket (7), and the rotation stopping gasket (7) is in limit fit with the fan blade (4) in the axial direction of the driven shaft (41).
9. An air conditioner comprising the blower of any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811297197.4A CN109268940B (en) | 2018-11-01 | 2018-11-01 | Air conditioner and fan thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811297197.4A CN109268940B (en) | 2018-11-01 | 2018-11-01 | Air conditioner and fan thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109268940A CN109268940A (en) | 2019-01-25 |
| CN109268940B true CN109268940B (en) | 2024-06-07 |
Family
ID=65191077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811297197.4A Active CN109268940B (en) | 2018-11-01 | 2018-11-01 | Air conditioner and fan thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109268940B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220095884A (en) * | 2020-12-30 | 2022-07-07 | 엘지전자 주식회사 | Air-conditioner |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010110029A (en) * | 2008-10-28 | 2010-05-13 | Nidec Shibaura Corp | Mold motor |
| CN205119257U (en) * | 2015-11-16 | 2016-03-30 | 珠海格力电器股份有限公司 | Bidirectional air outlet duct machine |
| CN207513883U (en) * | 2017-10-27 | 2018-06-19 | 珠海格力电器股份有限公司 | Vehicle air conditioner evaporation side fan structure and vehicle air conditioner |
| CN209279275U (en) * | 2018-11-01 | 2019-08-20 | 珠海格力电器股份有限公司 | Air conditioner and fan thereof |
-
2018
- 2018-11-01 CN CN201811297197.4A patent/CN109268940B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010110029A (en) * | 2008-10-28 | 2010-05-13 | Nidec Shibaura Corp | Mold motor |
| CN205119257U (en) * | 2015-11-16 | 2016-03-30 | 珠海格力电器股份有限公司 | Bidirectional air outlet duct machine |
| CN207513883U (en) * | 2017-10-27 | 2018-06-19 | 珠海格力电器股份有限公司 | Vehicle air conditioner evaporation side fan structure and vehicle air conditioner |
| CN209279275U (en) * | 2018-11-01 | 2019-08-20 | 珠海格力电器股份有限公司 | Air conditioner and fan thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109268940A (en) | 2019-01-25 |
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