CN210484181U - Composite material fan impeller - Google Patents
Composite material fan impeller Download PDFInfo
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- CN210484181U CN210484181U CN201921558799.0U CN201921558799U CN210484181U CN 210484181 U CN210484181 U CN 210484181U CN 201921558799 U CN201921558799 U CN 201921558799U CN 210484181 U CN210484181 U CN 210484181U
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Abstract
The utility model provides a combined material fan wheel, including the rim plate, the middle part of rim plate is provided with the pivot connecting portion, pivot connecting portion center is provided with the shaft hole, the rear end face in shaft hole is provided with the end face tooth, be provided with a plurality of arc main blade that gradually overturn from inside to outside and from inside to outside convergent on the front side end face of rim plate, a plurality of main blade use the shaft hole to be circumference array distribution as the center, all install the arc reposition of redundant personnel blade that gradually overturns from inside to outside and from inside to outside convergent between the adjacent two main blade, reposition of redundant personnel blade's volume is less than main blade, and reposition of redundant personnel blade installs on the central line by the runner that forms between the adjacent two main blade. The composite material fan impeller optimizes and improves the impeller structure, can ensure that the impeller has good pneumatic performance when rotating at high speed, has good stability when rotating at high speed, improves the pneumatic performance when rotating, improves the energy efficiency conversion rate of the impeller and reduces the energy consumption.
Description
Technical Field
The utility model relates to an impeller technical field, concretely relates to combined material fan wheel.
Background
The working principle of the fan is that the speed of gas is accelerated by an impeller rotating at a high speed, then the gas is decelerated, and meanwhile, the flow direction of the gas is changed, so that kinetic energy can be converted into potential energy.
The impeller is a general term for a wheel disc and rotating blades mounted on the wheel disc, and can convert mechanical energy into static pressure energy and kinetic energy of gas. It is used as an indispensable device in industrial production, and is mostly used in machines such as pumps and compressors.
The current traditional impeller is not accurately guaranteed in the process of large-batch industrial production, and has certain defects in design: (1) the structural design of the impeller has defects, so that the energy efficiency conversion rate is low, the rotation stability is poor, and the energy consumption is high; (2) most of the impellers are made of steel or light aluminum alloy, so that the weight is large, the assembly efficiency is reduced, and the corrosion resistance and the wear resistance are poor; (3) although the performance of the impeller adopting the PEEK material is improved, the impeller adopting the PEEK material still has the defects that: although the PEEK material has excellent physical and mechanical properties, and excellent properties such as heat resistance, corrosion resistance, wear resistance, fatigue resistance and the like, when the rotating speed of the impeller is very high, the mechanical strength of the PEEK material is not enough, and the PEEK material cannot meet the use requirements at high rotating speed.
Therefore, the fan performance is improved, various performances of the impeller are optimized, and the fan impeller is a problem which is concerned about and needs to be solved urgently in the fan industry.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art, the utility model provides a combined material fan wheel has improved the efficiency conversion rate of impeller through to structural design and the optimization on the material to make the rotatory stability of impeller good, the energy consumption is low.
In order to realize the technical scheme, the utility model provides a combined material fan wheel, including the rim plate, the middle part of rim plate is provided with the pivot connecting portion, pivot connecting portion center is provided with the shaft hole, and the rear end face in shaft hole is provided with the terminal surface tooth, be provided with a plurality of arc main blade that gradually overturn from inside to outside convergent and from inside to outside on the front end face of rim plate, a plurality of main blade use the shaft hole to be circumference array distribution as the center, all install the arc reposition of redundant personnel blade that gradually overturns from inside to outside convergent and from inside to outside between the adjacent two main blade, reposition of redundant personnel blade's volume is less than main blade, and reposition of redundant personnel blade installs on the central line by the runner that forms between the adjacent two main blade.
In the technical scheme, the axial connecting size of the rotating shaft can be shortened by arranging the end face teeth, the connecting structure is compact and reliable, is convenient to disassemble and assemble, can be rapidly engaged, and can be rapidly disengaged. By adopting the three-dimensional flow design for the main blade and the splitter blade, the main blade is designed into an arc shape which is gradually reduced from inside to outside and gradually overturned from inside to outside, so that the impeller can be ensured to have good pneumatic performance when rotating at high speed; and a plurality of main blades are designed to be distributed in a circumferential array by taking the shaft hole as a center, so that the impeller has good stability when rotating at high speed. The splitter blade which is the same as the main blade in shape but smaller in size is installed on the central line of the flow channel formed between the two adjacent main blades, so that disturbance to airflow can be enhanced, the pneumatic performance of the impeller during rotation is further improved, the energy efficiency conversion rate of the impeller is improved, and energy consumption is reduced.
Preferably, the main blade comprises a blade body and a tail fin arranged at the tail of the blade body, the tail fin is turned and erected step by step along the flow passage direction, and the ratio of the width a of the inner end of the blade body on the main blade to the width b of the outer end of the blade body on the main blade is 5: 1. the tail fin is gradually overturned and erected along the flow channel direction at the tail part of the blade body, and according to aerodynamic design, a complementary effect of air flow is formed between the inner end part with larger width of the blade body and the outer end part with smaller width of the blade body, so that air flow is more uniform when flowing forwards, and the aerodynamic performance of the air flow is enhanced. In the actual working process, the proportion between the width a of the inner end part of the blade body and the width b of the outer end part of the blade body has a great influence on the aerodynamic performance of the air during flowing, when the proportion between the width a of the inner end part of the blade body on the main blade and the width b of the outer end part of the blade body on the main blade is too large, the wind power at the middle part is too large in the rotating process of the impeller, the wind power at the outer side of the impeller is too small, the wind power at the middle part can overflow outwards, and the energy efficiency conversion rate of the impeller is reduced. When the ratio of the width a of the inner end part of the main blade upper blade body to the width b of the outer end part of the main blade upper blade body is too small, the wind power of the middle part of the impeller is small in the rotating process, the wind power of the outer side of the impeller is large, the outer wind power is gathered inwards, and the energy efficiency conversion rate of the impeller is also reduced. After experimental tests, when the ratio of the width a of the inner end part of the main blade upper blade body to the width b of the outer end part of the main blade upper blade body is 5: when the impeller rotates, the middle part of the impeller is equivalent to the wind power outside the impeller, so that the condition that the wind power overflows or folds inwards can be avoided, the wind power is conveyed forwards straightly, the pneumatic performance of the impeller during rotation can be improved, the energy efficiency conversion rate of the impeller is improved, and the energy consumption is reduced.
Preferably, the splitter blade comprises a blade body and a tail fin arranged at the tail of the blade body, the tail fin is turned and erected gradually along the flow channel direction, and the ratio of the width a of the inner end of the upper blade body of the splitter blade to the width b of the outer end of the upper blade body of the splitter blade is 4: 1, the width of the outer end part of the upper blade body of the splitter blade is the same as that of the outer end part of the upper blade body of the main blade. The test shows that when the width of the outer end part of the upper blade body of the splitter blade is the same as that of the outer end part of the upper blade body of the main blade, and the ratio of the width a of the inner end part of the upper blade body of the main blade to the width b of the outer end part of the upper blade body of the main blade is 5: 1, the ratio of the width a of the inner end part of the upper blade body of the splitter blade to the width b of the outer end part of the upper blade body of the splitter blade is 4: 1, the pneumatic performance of the whole impeller is optimal, the energy efficiency conversion rate of the impeller is optimal, and the energy consumption is low.
Preferably, an outwardly convex cylindrical boss is arranged on the end face of the front side of the connecting part of the rotating shaft, and four fixing screw holes are uniformly formed in the cylindrical boss, so that the connecting part of the rotating shaft and the rotating shaft can be conveniently butted.
Preferably, the back of the wheel disc is provided with an outward convex thread butt joint disc, so that the wheel disc and external equipment can be conveniently and integrally and quickly butt-jointed and installed.
Preferably, seven arc-shaped main blades which are gradually tapered from inside to outside and gradually turned over from inside to outside are arranged on the front end face of the wheel disc, and a splitter blade is arranged on a central line of a flow channel formed between every two adjacent main blades.
Preferably, the impeller exit diameter d1234mm, impeller inlet diameter d2123.6mm, and the width d of the flow passage outlet formed by the tail part of the main blade and the tail part of the splitter blade3Is 16.65 mm.
Preferably, the wheel disc, the main blade and the splitter blade are formed in an integrated mode after being compounded by polyether-ether-ketone resin and short carbon fiber materials in a mass ratio of 7:3 and then being cast by a fusible core. The polyether-ether-ketone (PEEK) resin is a special engineering plastic with excellent performance, and the carbon fiber is a high-strength, high-modulus and high-wear-resistant fiber. When high-performance parts are manufactured in engineering, PEEK is often subjected to composite reinforcement modification such as blending and filling, so that the performance of the PEEK is more excellent. The short carbon fiber reinforcement overcomes the defects of low elastic modulus and the like of common thermoplastic resin, and further enhances the mechanical and frictional properties of PEEK. When the rotating speed of the impeller is very high, the short carbon fiber reinforced PEEK composite material effectively ensures the mechanical strength of the impeller.
The utility model provides a pair of combined material fan wheel's beneficial effect lies in:
(1) the composite material fan impeller optimizes and improves the impeller structure, and the main blade and the splitter blade are designed into an arc shape which is gradually reduced from inside to outside and gradually overturned from inside to outside by adopting a three-dimensional flow design, so that the impeller can be ensured to have good pneumatic performance when rotating at high speed; and a plurality of main blades are designed to be distributed in a circumferential array by taking the shaft hole as a center, so that the impeller has good stability when rotating at high speed. The splitter blade which is the same as the main blade in shape but smaller in size is installed on the central line of the flow channel formed between the two adjacent main blades, so that disturbance to airflow can be enhanced, the pneumatic performance of the impeller during rotation is further improved, the energy efficiency conversion rate of the impeller is improved, and energy consumption is reduced.
(2) This combined material fan impeller is through setting up the terminal surface tooth in shaft hole rear end, can shorten the axial connection size of pivot, it is compact reliable, easy dismounting, can mesh rapidly on, can leave soon again, in the actual transmission process, through the tooth meshing transmission that sets up on terminal surface tooth and the motor shaft, the terminal surface tooth is by terminal surface tooth form transmission torque with the motor shaft, rather than transmitting through tie bolt, connecting bolt does not receive the shearing force under the normal operating mode, only receive axial tension, the torque of transmission is shared by a plurality of tooth, the atress is very even, stress concentration has been avoided, therefore the bolt is difficult for becoming invalid, terminal surface tooth can also play the centering effect in addition, the beat that the connecting piece pivot decentration brought has been avoided.
(3) This combined material fan impeller is through the structural design to main blade and splitter blade for when the impeller is rotatory, the impeller mid portion is equivalent with the wind-force in the impeller outside, can avoid appearing the condition that wind-force is excessive or inwards draw in, makes the straight forward transport of wind-force, and then can improve the aerodynamic performance when the impeller is rotatory, improves the efficiency conversion efficiency of impeller, reduces the energy consumption.
(4) The composite material fan impeller is made of the short carbon fiber reinforced PEEK composite material with good performance, compared with the traditional steel, the mechanical properties of the short carbon fiber reinforced PEEK composite material and the traditional steel are equivalent, but the weight of the composite material is only one sixth of that of the steel.
Drawings
Fig. 1 is a front view of the three-dimensional structure of the present invention;
fig. 2 is a front view of the present invention;
fig. 3 is a rear view of the three-dimensional structure of the present invention;
fig. 4 is a cross-sectional view of the present invention;
FIG. 5 is a perspective view of the main blade of the present invention;
in the figure: 1. a wheel disc; 2. a main blade; 21. a blade body; 22. a tail fin; 3. a splitter blade; 4. a rotating shaft connecting part; 41. a shaft hole; 42. fixing screw holes; 5. end face teeth; 6. the screw thread is connected with the plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by a person skilled in the art without any inventive step are within the scope of the present invention.
Example (b): a composite material fan impeller.
Referring to fig. 1 to 5, a composite fan impeller comprises a wheel disc 1, wherein the back of the wheel disc 1 is provided with a thread butt-joint disc 6 protruding outwards to facilitate the integral rapid butt-joint installation of the wheel disc 1 and external equipment, the middle part of the wheel disc 1 is provided with a rotating shaft connecting part 4, the center of the rotating shaft connecting part 4 is provided with a shaft hole 41, the front end face of the rotating shaft connecting part 4 is provided with a cylindrical boss protruding outwards, the cylindrical boss is uniformly provided with four fixing screw holes 42 to facilitate the butt-joint with a rotating shaft in the actual installation process, the rear end face of the shaft hole 41 is provided with end face teeth 5, the axial connection size of the rotating shaft can be shortened through the end face teeth 5, the impeller is compact and reliable, is convenient to assemble and disassemble, can be engaged and disengaged rapidly, and in the actual transmission process, the end face teeth 5 are engaged with teeth arranged on a motor shaft, and the end face, the connecting bolt is not transmitted through the tension bolt, the connecting bolt is not subjected to shearing force under normal working conditions and is only subjected to axial tension force, transmitted torque is shared by a plurality of teeth, the stress is very uniform, stress concentration is avoided, therefore, the bolt is not easy to lose efficacy, in addition, the end face teeth can also play a centering role, and deflection caused by non-concentricity of a rotating shaft of the connecting piece is avoided; be provided with seven arc main blade 2 from inside to outside convergent and from inside to outside gradual upset on the preceding side end face of rim plate 1, seven main blade 2 use shaft hole 41 to be the circumference array distribution as the center, all install from inside to outside convergent and from inside to outside gradual upset arc splitter blade 3 between two adjacent main blade 2, splitter blade 3's volume is less than main blade 2, and splitter blade 3 installs on the central line by the runner that forms between two adjacent main blade 2. By adopting the three-dimensional flow design for the main blade 2 and the splitter blade 3, the main blade 2 is designed into an arc shape which is gradually reduced from inside to outside and gradually overturned from inside to outside, so that the impeller can be ensured to have good pneumatic performance when rotating at high speed; and the seven main blades 2 are designed to be distributed in a circumferential array by taking the shaft hole 41 as a center, so that the impeller has good stability when rotating at high speed. The splitter blade 3 which is the same as the main blade 2 in shape but smaller in size is installed on the central line of the flow channel formed between the two adjacent main blades 2, so that disturbance to airflow can be enhanced, the pneumatic performance of the impeller during rotation is further improved, the energy efficiency conversion rate of the impeller is improved, and energy consumption is reduced.
Referring to fig. 4 and 5, in the present embodiment, the impeller outlet diameter d1234mm, impeller inlet diameter d2123.6mm, and the width d of the flow passage outlet formed by the tail part of the main blade and the tail part of the splitter blade316.65mm, and the main blade 2 comprises a blade body 21 and a tail fin 22 arranged at the tail part of the blade body, the tail fin 22 is turned and erected step by step along the flow path direction, and the ratio of the width a of the inner end part of the blade body 21 on the main blade 2 to the width b of the outer end part of the blade body 21 on the main blade is 5: 1, specifically, the width a of the inner end of the blade body 21 on the main blade 2 is 15mm, and the width b of the outer end of the blade body 21 on the main blade 2 is 3 mm. The tail part of the blade body 21 is provided with the tail fin 22 which is turned and erected step by step along the flow passage direction, so that a complementary effect of air flowing is formed between the inner end part with larger width of the blade body 21 and the outer end part with smaller width of the blade body 21 according to aerodynamic design, airflow is more uniform when flowing forwards, and the aerodynamic performance of the air flowing is enhanced. In actual operation, it was found that the ratio between the width a of the inner end of the vane body 21 and the width b of the outer end of the vane body 21 has a large influence on the aerodynamic performance in the air flow whenWhen the ratio of the width a of the inner end part of the upper blade body 21 of the main blade 2 to the width b of the outer end part of the upper blade body 21 of the main blade 2 is too large, the wind power at the middle part is too large in the rotation process of the impeller, and the wind power at the outer side of the impeller is too small, so that the wind power at the middle part overflows to the outer side, and the energy efficiency conversion rate of the impeller is reduced. When the ratio of the width a of the inner end of the blade body 21 on the main blade 2 to the width b of the outer end of the blade body 21 on the main blade 2 is too small, the wind power at the middle part of the impeller is small and the wind power at the outer side of the impeller is large in the rotation process of the impeller, so that the external wind power is gathered inwards, and the energy efficiency conversion rate of the impeller is also reduced. After experimental tests, it is found that when the ratio of the width a of the inner end of the blade body 21 on the main blade 2 to the width b of the outer end of the blade body 21 on the main blade 2 is 5: 1, when the impeller rotates, the middle part of the impeller is equivalent to the wind power outside the impeller, so that the condition that the wind power overflows or folds inwards can be avoided, the wind power is conveyed forwards straightly, the pneumatic performance of the impeller during rotation can be improved, the energy efficiency conversion rate of the impeller is improved, and the energy consumption is reduced.
In this embodiment, the splitter blade 3 has the same structure as the main blade 2, and includes a blade body 21 and a tail fin 22 disposed at the tail of the blade body, the tail fin 22 is turned and erected gradually in the flow direction, and the ratio of the width a of the inner end of the blade body 21 on the splitter blade 3 to the width b of the outer end of the blade body 21 on the splitter blade 3 is 4: 1, the width of the outer end part of the upper blade body 21 of the splitter blade 3 is the same as that of the outer end part of the upper blade body 21 of the main blade 2, specifically, the width a of the inner end part of the upper blade body 21 of the splitter blade 3 is 12mm, and the width b of the outer end part of the upper blade body 21 of the splitter blade 3 is 3 mm. The experiment shows that when the width of the outer end part of the upper blade body 21 of the splitter blade 3 is the same as that of the outer end part of the upper blade body 21 of the main blade 2, and the ratio of the width a of the inner end part of the upper blade body 21 of the main blade 2 to the width b of the outer end part of the upper blade body 21 of the main blade 2 is 5: 1, the ratio of the width a of the inner end part of the upper blade body 21 of the splitter blade 3 to the width b of the outer end part of the upper blade body 21 of the splitter blade 3 is 4: 1, the pneumatic performance of the whole impeller is optimal, the energy efficiency conversion rate of the impeller is optimal, and the energy consumption is low.
In the embodiment, the wheel disc 1, the main blade 2 and the splitter blade 3 are formed integrally by compounding polyether-ether-ketone resin and short carbon fiber materials in a mass ratio of 7:3 and then casting the compounded materials through a fusible core. The polyether-ether-ketone (PEEK) resin is a special engineering plastic with excellent performance, and the carbon fiber is a high-strength, high-modulus and high-wear-resistant fiber. When high-performance parts are manufactured in engineering, PEEK is often subjected to composite reinforcement modification such as blending and filling, so that the performance of the PEEK is more excellent. The short carbon fiber reinforcement overcomes the defects of low elastic modulus and the like of common thermoplastic resin, and further enhances the mechanical and frictional properties of PEEK. When the rotating speed of the impeller is very high, the short carbon fiber reinforced PEEK composite material effectively ensures the mechanical strength of the impeller.
In this example, a core-melting casting technique was used, and the temperature during casting was 380 ℃. The core melting molding is a process for producing a product with a complex shape by combining the traditional sand casting and lost wax casting molding processes with a composite material molding technology and using a low-melting-point alloy compounded by PEEK and short carbon fibers as a core. Casting the low-melting-point alloy into a fusible core insert through a mould, then placing the fusible core insert into the mould for molding, taking out a workpiece containing the fusible core insert after cooling, and then heating to melt and separate the low-melting-point alloy to obtain the product.
The composite material fan impeller optimizes and improves the impeller structure, and the main blade 2 and the splitter blade 3 are designed in a three-dimensional flow mode, and the main blade 2 is designed into an arc shape which is gradually reduced from inside to outside and gradually overturned from inside to outside, so that the impeller can be guaranteed to have good pneumatic performance when rotating at high speed; and the seven main blades 2 are designed to be distributed in a circumferential array by taking the shaft hole 41 as a center, so that the impeller has good stability when rotating at high speed. The splitter blade 3 which is the same as the main blade 2 in shape but smaller in size is installed on the central line of the flow channel formed between the two adjacent main blades 2, so that disturbance to airflow can be enhanced, the pneumatic performance of the impeller during rotation is further improved, the energy efficiency conversion rate of the impeller is improved, and energy consumption is reduced. And through the structural design of the main blades 2 and the splitter blades 3, when the impeller rotates, the middle part of the impeller is equivalent to the wind power outside the impeller, so that the condition that the wind power overflows or folds inwards can be avoided, the wind power is conveyed forwards straightly, the pneumatic performance of the impeller during rotation can be improved, the energy efficiency conversion rate of the impeller is improved, and the energy consumption is reduced.
The composite material fan impeller is made of the short carbon fiber reinforced PEEK composite material with good performance, compared with the traditional steel, the mechanical properties of the short carbon fiber reinforced PEEK composite material and the traditional steel are equivalent, but the weight of the composite material is only one sixth of that of the steel. The composite material has excellent performances in the aspects of light weight, high strength, fatigue resistance, vibration reduction, noise reduction, corrosion resistance, designability of materials and structures and the like.
The above description is a preferred embodiment of the present invention, but the present invention should not be limited to the disclosure of the embodiment and the accompanying drawings, and therefore, all equivalents and modifications that can be accomplished without departing from the spirit of the present invention are within the protection scope of the present invention.
Claims (7)
1. The utility model provides a combined material fan wheel, includes the rim plate, its characterized in that: the middle part of rim plate is provided with the pivot connecting portion, pivot connecting portion center is provided with the shaft hole, and the rear end face in shaft hole is provided with the end face tooth, be provided with a plurality of arc main blades that gradually overturn from inside to outside convergent and from inside to outside on the front end face of rim plate, a plurality of main blades use the shaft hole to be circumference array distribution as the center, all install the arc splitter blade that gradually overturns from inside to outside convergent and from inside to outside between the two adjacent main blades, splitter blade's volume is less than main blade, and splitter blade installs on the central line by the runner that forms between the two adjacent main blades.
2. The composite fan wheel of claim 1, wherein: the main blade comprises a blade body and a tail fin arranged at the tail of the blade body, the tail fin is turned and erected step by step along the flow channel direction, and the ratio of the width a of the inner end part of the blade body on the main blade to the width b of the outer end part of the blade body on the main blade is 5: 1.
3. the composite fan wheel of claim 1, wherein: the splitter blade comprises a blade body and a tail fin arranged at the tail of the blade body, the tail fin is turned and erected step by step along the flow channel direction, and the ratio of the width a of the inner end part of the upper blade body of the splitter blade to the width b of the outer end part of the upper blade body of the splitter blade is 4: 1, the width of the outer end part of the upper blade body of the splitter blade is the same as that of the outer end part of the upper blade body of the main blade.
4. The composite fan wheel of claim 1, wherein: the rotary shaft connecting part is characterized in that a cylindrical boss protruding outwards is arranged on the end face of the front side of the rotary shaft connecting part, and four fixing screw holes are uniformly formed in the cylindrical boss.
5. The composite fan wheel of claim 1, wherein: and the back surface of the wheel disc is provided with an outward convex threaded butt joint disc.
6. The composite fan wheel of claim 1, wherein: seven arc-shaped main blades which are gradually reduced from inside to outside and gradually turned over from inside to outside are arranged on the end face of the front side of the wheel disc, and a splitter blade is arranged on a central line of a flow channel formed between every two adjacent main blades.
7. The composite fan wheel of claim 6, wherein: the diameter d of the impeller outlet1234mm, impeller inlet diameter d2123.6mm, and the width d of the flow passage outlet formed by the tail part of the main blade and the tail part of the splitter blade3Is 16.65 mm.
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| CN201921558799.0U CN210484181U (en) | 2019-09-19 | 2019-09-19 | Composite material fan impeller |
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| CN201921558799.0U CN210484181U (en) | 2019-09-19 | 2019-09-19 | Composite material fan impeller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439852A (en) * | 2019-09-19 | 2019-11-12 | 广东智搏动力科技有限公司 | A kind of composite fan impeller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439852A (en) * | 2019-09-19 | 2019-11-12 | 广东智搏动力科技有限公司 | A kind of composite fan impeller |
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Effective date of registration: 20230710 Address after: No. 3, Floor 3, Plant A, No. 5 Jinliang Road, Hongqi Town, Jinwan District, Zhuhai City, Guangdong Province, 519000 Patentee after: Zhuhai Dezhiyuan Technology Co.,Ltd. Address before: 528400 East Interlayer of Building 3, Daisle Science Park, No. 16 Qinglu, Cuiheng New District, Zhongshan City, Guangdong Province Patentee before: Guangdong Zhibo Power Technology Co.,Ltd. |
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