CN102611075A - Smart monitoring protective device of electric water pump with liquid level control - Google Patents
Smart monitoring protective device of electric water pump with liquid level control Download PDFInfo
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- CN102611075A CN102611075A CN2012100841830A CN201210084183A CN102611075A CN 102611075 A CN102611075 A CN 102611075A CN 2012100841830 A CN2012100841830 A CN 2012100841830A CN 201210084183 A CN201210084183 A CN 201210084183A CN 102611075 A CN102611075 A CN 102611075A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 239000007788 liquid Substances 0.000 title claims abstract description 63
- 230000001681 protective effect Effects 0.000 title claims abstract description 59
- 238000012544 monitoring process Methods 0.000 title claims abstract description 21
- 238000012545 processing Methods 0.000 claims abstract description 10
- 230000001960 triggered effect Effects 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 description 10
- 230000001012 protector Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
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Abstract
The invention discloses a smart monitoring protective device of an electric water pump with liquid level control, which comprises a power switch, a control switch and an execution unit, wherein the execution unit is connected between an electric motor of the electric water pump and the power switch of a connection grid in series; the execution unit is a single-phase or triple-phase electromagnetic control device, such as an alternating current contactor, an electric control part of the execution unit is electrically connected with a central processing unit; and the central processing unit is configured with a storage unit, a power supply unit, a current sensor, a voltage sensor and a liquid level sensor, the protective device automatically protects the electric motor of the electric water pump according to the parameters, the liquid level signal and temperature signal of the grid, for example, automatic power cut or automatic power on. The smart monitoring protective device has the following advantages that: the protective device has a simple, reasonable structure and high intelligent degree, an optimal protective effect can be obtained through onekey setting, and the liquid level signal can stop the electric water pump from idling.
Description
Technical field
The present invention relates to the switch and the protective device thereof of electric equipment, particularly relate to and a kind ofly can carry out that intelligence is connected or the electric water pump intelligent monitoring protective device of the band liquid level control of cutting off the electricity supply according to electrical network parameter and motor temperature situation.
Background technology
At present, be hot relay system to be installed or to the safeguard measure of electric water pump with the air switch of overcurrent protection, along with the development of technology, the comprehensive protector of motor that also has part to adopt transistor to constitute; Can protect the motor of electric water pump to a certain extent.Its weak point: intelligent protection is not high, the accident generation that motor burns still occurs.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of electric water pump intelligent monitoring protective device to the high band liquid level control of the motor intelligent degree of protection of electric water pump is provided.
The object of the invention is achieved through following technical proposals: said protective device comprises mains switch, control switch and performance element, between the motor that said performance element is serially connected in electric water pump and the mains switch that is connected electrical network; Said performance element is the electromagnetic control apparatus of single-phase or three-phase, and like A.C. contactor, its electric control system is electrically connected with CPU; Said CPU configuration install software and the memory cell of preserving data, each unit of giving protective device or the power subsystem that module provides working power; Said protective device configuration current sensor, voltage sensor and liquid level sensor; Current sensor and voltage sensor are installed in the electrical network; Liquid level sensor is installed in the place, water source, and the liquid level signal output of the current signal output end of current sensor, the voltage signal output end of voltage sensor and liquid level sensor all is electrically connected with CPU; Said control switch is electrically connected with CPU, and running status and holding state are set; When said protective device is in running status; Protective device is in the intelligent protection state: when current signal that obtains when CPU or voltage signal or liquid level signal exceed a certain set point; CPU is sent instruction to performance element; Cut off the power supply of motor, protective device switches to holding state from running status; When said control switch is in holding state; When voltage signal that obtains when CPU and liquid level signal all satisfy safe operation and require; CPU is sent instruction to performance element, connects the power supply of motor, and control switch switches to running status from holding state.
Said protective device configuration temperature sensor, temperature sensor is installed on the motor of electric water pump, and the temperature signal output of temperature sensor is electrically connected with CPU; When said protective device is in running status; Protective device is in the intelligent protection state: when current signal that obtains when CPU or voltage signal or liquid level signal or temperature signal exceed a certain set point; CPU is sent instruction to performance element; Cut off the power supply of motor, control switch switches to holding state from running status; When said control switch is in holding state; When voltage signal that obtains when CPU and liquid level signal and temperature signal all satisfy safe operation and require; CPU is sent instruction to performance element; Connect the power supply of motor, protective device switches to running status from holding state.
Said CPU configuration is provided with unit, display unit and external interface, unit and display unit is set constitutes the human-computer dialogue device jointly; Said display unit constitutes the monitoring arrangement that shows the electric water pump operating state or shut down reason; Said external interface can connect remote computer.
The key that the configuration of said CPU can be automatically detects and set the safeguard protection parameter to electric water pump motor running parameter is automatically adjusted; When said protective device is in running status; Protective device is in intelligent protection and the ready state of adjusting: if there is not the parameter tuning record of electric water pump in the memory cell; And electric water pump is when first operation accumulated running time reaches set point, perhaps last time parameter tuning time surpass when being worth sometime the button of perhaps adjusting by next key as the operator; The modular circuit that one key is adjusted is triggered; After one key was adjusted and is triggered, CPU analyzing and processing electric water pump was in the historical record of run duration and the parameter of current detection, and the safeguard protection parameter of electric water pump is optimized combination and preserves.
Between said CPU and the liquid level sensor, the square wave power supply is set, the square wave of the output AC low frequency of square wave power supply, frequency is not higher than 4 hertz.
Compared with prior art, the present invention has the following advantages: simple and reasonable, intelligent degree is high, a key is adjusted and can be obtained the best protection effect to electric water pump, the idle running that the liquid level signal that liquid level sensor detects can be stopped electric water pump effectively.
Description of drawings
Fig. 1 is the embodiment of the invention 1 structural representation.
Fig. 2 is the embodiment of the invention 2 structural representations.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further:
Referring to accompanying drawing, said protective device comprises mains switch, control switch and performance element, between the motor that said performance element is serially connected in electric water pump and the mains switch that is connected electrical network; Said performance element is the electromagnetic control apparatus of single-phase or three-phase, and its electric control system is electrically connected with CPU; Said CPU configuration install software and the memory cell of preserving data, each unit of giving protective device or the power subsystem that module provides working power; Said protective device configuration current sensor, voltage sensor and liquid level sensor; Current sensor and voltage sensor are installed in the electrical network; Liquid level sensor is installed in the place, water source, and the liquid level signal output of the current signal output end of current sensor, the voltage signal output end of voltage sensor and liquid level sensor all is electrically connected with CPU; Said protective device is electrically connected with CPU, and running status and holding state are set; When said protective device is in running status; Protective device is in the intelligent protection state: when current signal that obtains when CPU or voltage signal or liquid level signal exceed a certain set point; CPU is sent instruction to performance element; Cut off the power supply of motor, control switch switches to holding state from running status; When said control switch is in holding state; When voltage signal that obtains when CPU and liquid level signal all satisfy safe operation and require; CPU is sent instruction to performance element, connects the power supply of motor, and protective device switches to running status from holding state.
Said protective device configuration temperature sensor, temperature sensor is installed on the motor of electric water pump, and the temperature signal output of temperature sensor is electrically connected with CPU; When said control switch is in running status; Protective device is in the intelligent protection state: when current signal that obtains when CPU or voltage signal or liquid level signal or temperature signal exceed a certain set point; CPU is sent instruction to performance element; Cut off the power supply of motor, control switch switches to holding state from running status; When said control switch is in holding state; When voltage signal that obtains when CPU and liquid level signal and temperature signal all satisfy safe operation and require; CPU is sent instruction to performance element; Connect the power supply of motor, control switch switches to running status from holding state.
Said CPU configuration is provided with unit, display unit and external interface, unit and display unit is set constitutes the human-computer dialogue device jointly; Said display unit constitutes the monitoring arrangement that shows the electric water pump operating state or shut down reason; Said external interface can connect remote computer.
The key that the configuration of said CPU can be automatically detects and set the safeguard protection parameter to electric water pump motor running parameter is automatically adjusted; When said protective device is in running status; Protective device is in intelligent protection and the ready state of adjusting: if there is not the parameter tuning record of electric water pump in the memory cell; And electric water pump is when first operation accumulated running time reaches set point, perhaps last time parameter tuning time surpass when being worth sometime the button of perhaps adjusting by next key as the operator; The modular circuit that one key is adjusted is triggered; After one key was adjusted and is triggered, CPU analyzing and processing electric water pump was in the historical record of run duration and the parameter of current detection, and the safeguard protection parameter of electric water pump is optimized combination and preserves.
Between said CPU and the liquid level sensor, the square wave power supply is set, the square wave of the output AC low frequency of square wave power supply, frequency is not higher than 4 hertz.
CPU: the product or the module that adopt prior art.
One key is adjusted: be a trigger module, cooperate with special-purpose software with button and trigger.The module that one key is adjusted adopts the prior art design and makes.The button that one key is adjusted adopts the product of prior art.
Control switch: be a trigger switch, the signal of trigger switch is given CPU, and CPU is given performance element again.Control switch adopts the product of prior art.
Performance element: be a switch that receives central processing unit controls, performance element adopts the product of prior art.
Voltage sensor: the under-voltage or overvoltage of detection of grid, voltage signal feeds back to CPU.Voltage sensor adopts the product of prior art.
Current sensor: the detection of grid phase shortage, the overcurrent or the no-load current of detection motor, current signal feeds back to CPU.Current sensor adopts the product of prior art.
Temperature sensor: the real time temperature when detecting the machine operation of electric water pump motor, temperature signal feeds back to CPU.Temperature sensor adopts the product of prior art.
Memory cell: the parameter of storing software, setting and preservation real time data.Memory cell adopts the product of prior art.
Display unit: display working condition.Display unit adopts the product of prior art.
The unit is set: manual work is provided with the protection parameter.The product that the unit adopts prior art is set.
Power subsystem: power supply receives central processing unit controls from electrical network, each modular unit supply power.Power subsystem adopts the product of prior art.
External interface: with extraneous communication or networking.External interface adopts the product of prior art.
Liquid level sensor: the product that adopts prior art;
Square wave power supply: the circuit or the product that adopt prior art.Frequency is not less than 4 hertz ac square wave, can prolong the distance of liquid level sensor to CPU effectively.
Embodiment 1: the single-phase electric water pump intelligent monitoring protective device of band liquid level control.
The electric water pump intelligent monitoring protective device of single-phase zone liquid level of the present invention control is connected between the motor of the mains switch that connects electrical network and electric water pump.CPU is the core, connects voltage sensor, current sensor, temperature sensor, liquid level sensor, power subsystem, display unit, external interface, the unit is set, control switch, a key are adjusted, memory cell and performance element.In the present embodiment: each one of the liquid level sensor of voltage sensor, current sensor, temperature sensor, lowest water level; Voltage sensor, current sensor are connected in the electrical network; Temperature sensor is installed on the motor of electric water pump, and liquid level sensor is installed in the extreme lower position of the setting at water source.When protective device is in the " RUN " state; Assembled protector is in intelligent protection and the ready state of adjusting: if there is not the parameter tuning record of electric water pump in the memory cell; Electric water pump after first operation accumulative total is moved a period of time, perhaps last time parameter tuning time surpass when being worth sometime the button of perhaps adjusting by next key as the operator; The modular circuit that one key is adjusted is triggered; After one key was adjusted and is triggered, CPU analyzing and processing electric water pump was in the historical record of run duration and the parameter of current detection, and the safeguard protection parameter of electric water pump is optimized combination and preserves.When current signal that obtains when CPU or voltage signal or temperature signal or water level signal exceeded a certain set point, CPU was sent instruction to performance element, cuts off electric network source; When current signal, voltage signal, temperature signal and the water level that obtains when CPU all satisfied safe operation and require, CPU was sent instruction to performance element, connects electric network source; When said control switch was in halted state, protective device was in holding state.Protective device of the present invention can be realized unattended operation, and automated intelligent is kept watch on and protection.
Embodiment 2: the three-phase electric water pump intelligent monitoring protective device of band liquid level control.
Basic identical with embodiment 1, different is to use on the three-phase electric water pump.Each three of voltage sensor and current sensors.One key is adjusted identical with embodiment 1 with intelligent protection.Protective device of the present invention can be realized unattended operation, and automated intelligent is kept watch on and protection.
The protector of the foregoing description 1-2, can realize following protection:
(1), overcurrent protection.Through the human-computer dialogue device threshold value of overcurrent is set, when detect electric current exceed the threshold value certain hour as 5 seconds after, CPU is sent instruction and is cut off the electricity supply to performance element, and show state and reason.
(2), no-load protection.Through the human-computer dialogue device threshold value of no-load current is set, when detect electric current be lower than the threshold value certain hour as 20 seconds after, CPU is sent instruction and is cut off the electricity supply to performance element, and show state and reason.To be that electric water pump is anhydrous take out in zero load, the motor idle running of electric water pump.
(3), overvoltage protection.Through the human-computer dialogue device threshold value of overvoltage is set, when detect voltage exceed the threshold value certain hour as 5 seconds after, CPU is sent instruction and is cut off the electricity supply to performance element, and show state and reason.
(4), under-voltage protection.Through the human-computer dialogue device under-voltage threshold value is set, when detect voltage be lower than the threshold value certain hour as 5 seconds after, CPU is sent instruction and is cut off the electricity supply to performance element, and show state and reason.
(5), motor temperature protection.Through the human-computer dialogue device threshold value of electric water pump motor temperature is set, is higher than after the threshold value certain hour was as 5 seconds when detecting the electric water pump motor temperature, CPU is sent instruction and is cut off the electricity supply to performance element, and show state and reason.
(6), the automated intelligent protection parameter of adjusting.When said control switch is in running status; Protective device is in intelligent protection and the ready state of adjusting: if there is not the parameter tuning record of electric water pump in the memory cell; Electric water pump after first operation accumulative total is moved a period of time, perhaps last time parameter tuning time surpass when being worth sometime the button of perhaps adjusting by next key as the operator; The modular circuit that one key is adjusted is triggered; After one key was adjusted and is triggered, CPU analyzing and processing electric water pump was in the historical record of run duration and the parameter of current detection, and the safeguard protection parameter of electric water pump is optimized combination and preserves.When current signal that obtains when CPU or voltage signal or temperature signal exceeded a certain set point, CPU was sent instruction to performance element, cuts off electric network source; When current signal, voltage signal and the temperature signal that obtains when CPU all satisfied safe operation and require, CPU was sent instruction to performance element, connects electric network source; When said control switch was in halted state, protective device was in holding state.
(7), intelligent surveillance.Display unit is the real-time display working condition of ability just, particularly can show the reason of electric water pump when intelligent power-off protection, is convenient to quick maintenance platoon and is out of order.
(8), open-phase protection.This is the intelligent protection to the three-phase electric water pump.When the numerical value of the current sensor of a certain phase is 0, just can conclude that this does not have electricity mutually, is phase shortage.CPU is sent instruction and is cut off the electricity supply to performance element, and show state and reason.
(9), liquid level protection: when liquid level signal shows that when reaching set point, CPU is judged to be dried-up water level, send instruction and cut off the electricity supply, and show state and reason to performance element.The idle running that the liquid level signal that liquid level sensor detects can be stopped electric water pump effectively.
(10), unattended operation, operation automatically.That is: in electric water pump when operation,, when detected electric current or voltage or temperature or liquid level exceeded the threshold value of setting, CPU was sent instruction and is cut off the electricity supply to performance element; Electric water pump is after automatic a period of time out of service, and when detected voltage or temperature and liquid level all satisfied the safe operation index, CPU was sent instruction and given the performance element energized.Can realize unattended operation, the motor of electric water pump is carried out intelligent automatic protection.
Claims (9)
1. electric water pump intelligent monitoring protective device with liquid level control, said protective device comprises mains switch, control switch and performance element, between the motor that said performance element is serially connected in electric water pump and the mains switch that is connected electrical network; It is characterized in that: said performance element is the electromagnetic control apparatus of single-phase or three-phase, and like A.C. contactor, its electric control system is electrically connected with CPU; Said CPU configuration install software and the memory cell of preserving data, each unit of giving protective device or the power subsystem that module provides working power; Said protective device configuration current sensor, voltage sensor and liquid level sensor; Current sensor and voltage sensor are installed in the electrical network; Liquid level sensor is installed in the place, water source, and the liquid level signal output of the current signal output end of current sensor, the voltage signal output end of voltage sensor and liquid level sensor all is electrically connected with CPU; Said control switch is electrically connected with CPU, and running status and holding state are set; When said control switch is in running status; Protective device is in the intelligent protection state: when current signal that obtains when CPU or voltage signal or liquid level signal exceed a certain set point; CPU is sent instruction to performance element; Cut off the power supply of motor, control switch switches to holding state from running status; When said control switch is in holding state; When voltage signal that obtains when CPU and liquid level signal all satisfy safe operation and require; CPU is sent instruction to performance element, connects the power supply of motor, and control switch switches to running status from holding state.
2. the electric water pump intelligent monitoring protective device of band liquid level control according to claim 1; It is characterized in that: said protective device configuration temperature sensor; Temperature sensor is installed on the motor of electric water pump, and the temperature signal output of temperature sensor is electrically connected with CPU; When said control switch is in running status; Protective device is in the intelligent protection state: when current signal that obtains when CPU or voltage signal or liquid level signal or temperature signal exceed a certain set point; CPU is sent instruction to performance element; Cut off the power supply of motor, control switch switches to holding state from running status; When said control switch is in holding state; When voltage signal that obtains when CPU and liquid level signal and temperature signal all satisfy safe operation and require; CPU is sent instruction to performance element; Connect the power supply of motor, control switch switches to running status from holding state.
3. the electric water pump intelligent monitoring protective device of band liquid level control according to claim 1 and 2; It is characterized in that: said CPU configuration is provided with unit, display unit and external interface, unit and display unit is set constitutes the human-computer dialogue device jointly; Said display unit constitutes the monitoring arrangement that shows the electric water pump operating state or shut down reason; Said external interface can connect remote computer.
4. the electric water pump intelligent monitoring protective device of band liquid level according to claim 1 and 2 control is characterized in that: the key that said CPU configuration can be automatically detects and set the safeguard protection parameter to electric water pump motor running parameter is automatically adjusted; When said control switch is in running status; Protective device is in intelligent protection and the ready state of adjusting: if there is not the parameter tuning record of electric water pump in the memory cell; And electric water pump is when first operation accumulated running time reaches set point, perhaps last time parameter tuning time surpass when being worth sometime the button of perhaps adjusting by next key as the operator; The modular circuit that one key is adjusted is triggered; After one key was adjusted and is triggered, CPU analyzing and processing electric water pump was in the historical record of run duration and the parameter of current detection, and the safeguard protection parameter of electric water pump is optimized combination and preserves.
5. the electric water pump intelligent monitoring protective device of band liquid level according to claim 3 control is characterized in that: the key that said CPU configuration can be automatically detects and set the safeguard protection parameter to electric water pump motor running parameter is automatically adjusted; When said control switch is in running status; Protective device is in intelligent protection and the ready state of adjusting: if there is not the parameter tuning record of electric water pump in the memory cell; And electric water pump is when first operation accumulated running time reaches set point, perhaps last time parameter tuning time surpass when being worth sometime the button of perhaps adjusting by next key as the operator; The modular circuit that one key is adjusted is triggered; After one key was adjusted and is triggered, CPU analyzing and processing electric water pump was in the historical record of run duration and the parameter of current detection, and the safeguard protection parameter of electric water pump is optimized combination and preserves.
6. the electric water pump intelligent monitoring protective device of band liquid level control according to claim 1 and 2; It is characterized in that: between said CPU and the liquid level sensor; The square wave power supply is set, the square wave of the output AC low frequency of square wave power supply, frequency is not higher than 4 hertz.
7. the electric water pump intelligent monitoring protective device of band liquid level control according to claim 3; It is characterized in that: between said CPU and the liquid level sensor; The square wave power supply is set, the square wave of the output AC low frequency of square wave power supply, frequency is not higher than 4 hertz.
8. the electric water pump intelligent monitoring protective device of band liquid level control according to claim 4; It is characterized in that: between said CPU and the liquid level sensor; The square wave power supply is set, the square wave of the output AC low frequency of square wave power supply, frequency is not higher than 4 hertz.
9. the electric water pump intelligent monitoring protective device of band liquid level control according to claim 5; It is characterized in that: between said CPU and the liquid level sensor; The square wave power supply is set, the square wave of the output AC low frequency of square wave power supply, frequency is not higher than 4 hertz.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210084183.0A CN102611075B (en) | 2012-03-28 | 2012-03-28 | Smart monitoring protective device of electric water pump with liquid level control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210084183.0A CN102611075B (en) | 2012-03-28 | 2012-03-28 | Smart monitoring protective device of electric water pump with liquid level control |
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| CN102611075A true CN102611075A (en) | 2012-07-25 |
| CN102611075B CN102611075B (en) | 2015-06-10 |
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| CN201210084183.0A Active CN102611075B (en) | 2012-03-28 | 2012-03-28 | Smart monitoring protective device of electric water pump with liquid level control |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103066564A (en) * | 2012-12-19 | 2013-04-24 | 梁中昌 | Water pump automatic power-off protective method and water pump automatic power-off protective device |
| CN104035421A (en) * | 2014-06-20 | 2014-09-10 | 遵义师范学院 | Intelligent control system and method of water pump |
| CN106788124A (en) * | 2016-12-13 | 2017-05-31 | 湖北江山重工有限责任公司 | A kind of motor automatic control device and control method |
| CN108223402A (en) * | 2018-01-02 | 2018-06-29 | 厦门芯阳科技股份有限公司 | A kind of monitoring method of DC water pump |
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| CN2824400Y (en) * | 2005-09-26 | 2006-10-04 | 马银生 | Intelligent controller for starting water pump motor |
| CN202550484U (en) * | 2012-03-28 | 2012-11-21 | 彭勇 | Intelligent monitoring and motor protecting device with liquid level control function for electric water pump |
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| CN2465375Y (en) * | 2001-02-28 | 2001-12-12 | 罗丕荣 | :Automatic protection controller for single phase water pump motor |
| CN2672933Y (en) * | 2003-12-30 | 2005-01-19 | 彭勇 | Intelligent start controller for water pump |
| CN2824400Y (en) * | 2005-09-26 | 2006-10-04 | 马银生 | Intelligent controller for starting water pump motor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066564A (en) * | 2012-12-19 | 2013-04-24 | 梁中昌 | Water pump automatic power-off protective method and water pump automatic power-off protective device |
| CN104035421A (en) * | 2014-06-20 | 2014-09-10 | 遵义师范学院 | Intelligent control system and method of water pump |
| CN106788124A (en) * | 2016-12-13 | 2017-05-31 | 湖北江山重工有限责任公司 | A kind of motor automatic control device and control method |
| CN106788124B (en) * | 2016-12-13 | 2020-04-17 | 湖北江山重工有限责任公司 | Automatic motor control device and control method |
| CN108223402A (en) * | 2018-01-02 | 2018-06-29 | 厦门芯阳科技股份有限公司 | A kind of monitoring method of DC water pump |
| CN108223402B (en) * | 2018-01-02 | 2019-05-07 | 厦门芯阳科技股份有限公司 | A kind of monitoring method of DC water pump |
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| CN102611075B (en) | 2015-06-10 |
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Effective date of registration: 20160726 Address after: 410005 Hunan province Changsha Kaifu District, Furong Road No. 159 room 810 Alex Hua Tian Jinxiu Patentee after: Hunan Leading Science & Technology Development Co., Ltd. Address before: 410008 Hunan province Changsha Kaifu District, Furong Road No. 210, room 810, Alex Hua Tian Jinxiu Patentee before: Peng Yong |
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Address after: 410005 Changsha high and New Development Zone, Changsha, Jianshan Lake Community Yan Nong Road, No. 41 1 Patentee after: Hunan Leading Science & Technology Development Co., Ltd. Address before: 410005 Hunan province Changsha Kaifu District, Furong Road No. 159 room 810 Alex Hua Tian Jinxiu Patentee before: Hunan Leading Science & Technology Development Co., Ltd. |