CN104065309B - Fan drive circuit - Google Patents
Fan drive circuit Download PDFInfo
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- CN104065309B CN104065309B CN201310084345.5A CN201310084345A CN104065309B CN 104065309 B CN104065309 B CN 104065309B CN 201310084345 A CN201310084345 A CN 201310084345A CN 104065309 B CN104065309 B CN 104065309B
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- modulating signal
- width modulating
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- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims abstract description 63
- 230000001934 delay Effects 0.000 claims abstract description 11
- 229910052755 nonmetal Inorganic materials 0.000 claims description 12
- 230000003111 delayed effect Effects 0.000 claims description 5
- 101150013030 FAN1 gene Proteins 0.000 description 17
- 230000005611 electricity Effects 0.000 description 5
- 210000001367 artery Anatomy 0.000 description 4
- 230000000875 corresponding effect Effects 0.000 description 4
- 210000003462 vein Anatomy 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 230000005669 field effect Effects 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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Abstract
A kind of fan drive circuit, for driving the first fan and the second fan, the first fan and the second fan in parallel and being connected with the positive pole of dc source respectively.Fan drive circuit includes pulse width modulating signal generation module, phase-locked and phase place delays module, pulse wave exports the first comparator and the first electric capacity.One end of pulse width modulating signal generation module is connected with external power source, and the other end and the first fan are connected.Phase-locked module of delaying with phase place is connected with pulse width modulating signal generation module.Pulse wave exports the first comparator and includes first input end, the second input and output.First electric capacity is connected between the positive pole of dc source and ground.The distracted primary current that fan drive circuit utilizes the inductance in previous stage fan to produce at non-operative periods at pulse width modulating signal generation module drives rear stage fan in advance, has saved fans drive power consumption and has reduced noise.
Description
Technical field
The present invention relates to a kind of fan drive circuit, particularly relate to one and can reduce fans drive energy consumption
Drive circuit.
Background technology
The driver circuit of conventional fan, is that a kind of continuation consumes the energy to drive fan to rotate not
Economic circuit design, also because circuit needs constantly to provide the energy to drive fan, correlated parts
Will persistently produce power consumption consumption, cause shortening of life-span.If rotation speed of the fan is the highest, consumed work
Rate will occupy overwhelming majority during system underloading, and system so will be made to be unable to reach energy law
The requirement of rule.
Summary of the invention
The present invention provides a kind of fan drive circuit, utilize that inductance in previous stage fan produces distracted time
Electric current drives rear stage fan in advance, energy consumption when reducing fans drive and noise.
The present invention provides a kind of fan drive circuit, for driving the first fan and the second fan, the
One fan and the second fan are in parallel and are connected with the positive pole of dc source respectively.Fan drive circuit bag
Include pulse width modulating signal generation module, phase-locked delay module, pulse wave output the first ratio with phase place
Relatively device and the first electric capacity.One end of pulse width modulating signal generation module is connected with external power source,
The other end and the first fan are connected, and are used for producing pulse wave and drive the first fan and the second fan.Phase-locked
Delay module to be connected with pulse width modulating signal generation module with phase place, be used for sending pulse width
Modulated signal is to pulse width modulating signal generation module so that pulse width modulating signal produces mould
Block produces the pulse wave of out of phase difference.Pulse wave export the first comparator include first input end, second
Input and output, first input end with phase-locked delay with phase place module be connected with obtain phase-locked with
Phase place delays the pulse width modulating signal that module produces, and the second input inputs reference power source, defeated
Go out end to be connected between the second fan and ground, for existing according to pulse width modulating signal generation module
Pulse pulse wave is exported to the second fan after receiving pulse width modulating signal.First electric capacity is connected to
Between positive pole and the ground of dc source.Wherein, the inductance during fan drive circuit utilizes the first fan
Distracted primary current is produced at non-operative periods at pulse width modulating signal generation module, and by distracted electricity
Stream is stored in the first electric capacity, and utilizes distracted primary current to drive the second fan in advance.
Preferably, pulse width modulating signal generation module includes the second electric capacity and voltage comparator,
Voltage comparator includes first input end, the second input and output, the first of voltage comparator
Input is connected with external power source, and the second input of voltage comparator is Voltage Reference end, voltage
The output of comparator and the first fan are connected；Wherein, when the external voltage source electricity of voltage comparator
When pressure is more than the reference voltage of voltage comparator, voltage comparator output output high level signal is given
Pulse width modulating signal generation module so that pulse width modulating signal generation module exports positive arteries and veins
Ripple so that pulse width modulating signal generation module is in the work period；When outside voltage comparator
When boundary's voltage source is less than the reference voltage of voltage comparator, the output of voltage comparator exports low electricity
Ordinary mail number gives pulse width modulating signal generation module so that pulse width modulating signal generation module
It is in non-operative periods.
Preferably, phase-locked module of delaying with phase place is connected with pulse width modulating signal generation module,
Phase-locked module of delaying with phase place is for producing pulse width modulating signal that phase difference is 180 to pulse
Bandwidth modulation signals generation module.
Preferably, fan drive circuit also includes the 3rd electric capacity and resistance, the 3rd electric capacity and ground phase
Even, resistance and the second electric capacity are connected, and the 3rd electric capacity and resistance form a filter circuit, for by arteries and veins
Rush triangular wave produced by bandwidth modulation signals generation module and be converted into square wave for driving the first fan
With the second fan.
Preferably, fan drive circuit also includes that three fan and pulse wave export the second comparator, the
Three fan and the first fan and the second fan are in parallel, and are connected with DC power anode respectively.Pulse wave
Export the second comparator and include first input end, the second input and output, pulse wave output second
The first input end of comparator is delayed module with phase place be connected with phase-locked, and pulse wave exports the second comparator
The second input be connected with pulse width modulating signal generation module, pulse wave exports the second comparator
Output and three fan be connected, be used for exporting pulse wave to three fan.
Preferably, phase-locked module of delaying with phase place is connected with pulse width modulating signal generation module,
Phase-locked module of delaying with phase place is for producing pulse width modulating signal that phase difference is 120 to pulse
Bandwidth modulation signals generation module.
Preferably, fan drive circuit also includes the first switch, second switch and the 3rd switch, the
One switch, second switch and the 3rd switch the first electrode respectively with the first corresponding fan, second
Fan and three fan are connected, and the second electrode of the first switch, second switch and the 3rd switch is respectively
Being connected with earth terminal, the control pole of the first switch, second switch and the 3rd switch is respectively with corresponding
Voltage comparator, pulse wave export the first comparator and pulse wave exports the output phase of the second comparator
Even.When pulse width modulating signal generation module exports positive pulse wave, the control of the first switch is extremely
High level, the first switch conduction, the first fan is started working.When pulse width modulating signal produces
During module from service, the control extremely low level of the first switch, the first fan quits work, and
Inductance in first fan utilizes the pulse width modulating signal generation module out-of-work time to produce
Distracted primary current, and produced distracted primary current is stored in the first electric capacity is used for driving in advance second
Fan.
Preferably, the first switch, second switch and the 3rd switch are the nonmetal FET of N-type,
First switch, second switch and the leakage that the first electrode is the nonmetal FET of N-type of the 3rd switch
Pole, the second electrode of the first switch, second switch and the 3rd switch is the nonmetal FET of N-type
Source electrode, first switch, second switch and the 3rd switch the control nonmetal field-effect of extremely N-type
The grid of pipe.
The fan drive circuit of the present invention utilizes the inductance in previous stage fan to believe in pulse width modulation
Number distracted primary current that generation module produces at non-operative periods drives rear stage fan in advance, saves
Fans drive power consumption and reduce noise.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of fan drive circuit the first embodiment of the present invention.
Fig. 2 is the circuit diagram of fan drive circuit the second embodiment of the present invention.
Fig. 3 is the circuit diagram of fan drive circuit the 3rd embodiment of the present invention.
Main element symbol description
Fan drive circuit 100
Pulse width modulating signal generation module 101
Phase-locked and phase place delays module 103
Voltage comparator U1
Pulse wave exports the first comparator U2
Pulse wave exports the second comparator U3
First electric capacity C1
Second electric capacity C2
3rd electric capacity C3
Resistance R1
Dc source DC
First switch K1
Second switch K2
3rd switch K3
First fan Fan1
Second fan Fan2
Three fan Fan3
Following detailed description of the invention will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Detailed description of the invention
Refer to Fig. 1, for the physical circuit of the first embodiment of fan drive circuit 100 of the present invention
Figure.
In the present embodiment, fan drive circuit 100 includes the first fan Fan1 and the second fan
Fan2.First fan Fan1 and the second fan Fan2 in parallel and respectively with the positive pole phase of dc source DC
Even.Fan drive circuit 100 includes pulse width modulating signal generation module 101, phase-locked and phase place
Delay module 103, pulse wave exports the first comparator U2 and the first electric capacity C1.Wherein, fans drive electricity
Road 100 utilizes the inductance in the first fan Fan1 at pulse width modulating signal generation module 101 non-
Work period produces distracted primary current, and is stored in by distracted primary current in the first electric capacity C1, and utilizes distracted
Primary current drives the second fan Fan2 in advance.
One end of pulse width modulating signal generation module 101 is connected with external power source, the other end and
One fan Fan1 is connected, and is used for producing pulse wave and drives the first fan Fan1 and the second fan Fan2.
In the present embodiment, pulse width modulating signal generation module 101 includes the second electric capacity C2
And voltage comparator U1, voltage comparator U1 include first input end, the second input and output
End, the first input end of voltage comparator U1 is connected with external power source, and the second of voltage comparator is defeated
Entering end is that Voltage Reference end, the output of voltage comparator U1 and the first fan Fan1 are connected；Its
In, when the external voltage source voltage of voltage comparator U1 is more than the reference voltage of voltage comparator U1
Time, voltage comparator U1 output output high level signal is to pulse width modulating signal generation module
101 so that pulse width modulating signal generation module 101 is in the work period so that pulse width
Modulated signal generation module 101 exports positive pulse wave；When the external voltage source of voltage comparator U1 is less than
During the reference voltage of voltage comparator U1, the output output low level signal of voltage comparator U1
To pulse width modulating signal generation module 101 so that pulse width modulating signal generation module 101
It is in non-operative periods.Pulse width modulating signal to pulse width modulating signal generation module 101,
Pulse width modulating signal generation module 101 is made to produce the pulse wave of out of phase difference.
Phase-locked and phase place delays module 103 for producing the pulse width modulating signal that phase difference is 180
To pulse width modulating signal module 101 so that pulse width modulating signal generation module 101 produces
Pulse wave is to drive the second fan Fan2.
Pulse wave exports the first comparator U2 and includes first input end, the second input and output, the
One input is connected and phase-locked delays module 103 with phase place with phase-locked module 103 of delaying with phase place to obtain
The pulse width modulating signal produced, the second input input reference power source, output is connected to the
Between two fans and ground, for receiving pulse width according to pulse width modulating signal generation module
Pulse pulse wave is exported to the second fan after degree modulated signal.
First electric capacity C1 is connected between positive pole and the ground of dc source DC, for stored current in order to
Drive the second fan Fan2 in advance.Fan drive circuit 100 utilizes the inductance in the first fan Fan1 to exist
Pulse width modulating signal generation module 101 produces distracted primary current at non-operative periods, and by distracted electricity
Stream is stored in the first electric capacity C1, and utilizes distracted primary current to drive the second fan Fan2 in advance.As
Before, phase-locked and phase place delays module 103 can produce the phase difference having 180 degree, namely pulse width
Degree modulated signal generation module 101 can send positive pulse wave, the first fan between 0 to 180 degree phase places
Fan1 is also at duty.After 180 degree phase places, pulse width modulating signal generation module
101 can quit work, and now the inductance in the first fan Fan1 can produce distracted primary current, and will produce
Distracted primary current be stored in the first electric capacity C1.When the first fan Fan1 quits work, it is stored in
Distracted primary current in first electric capacity C1 preliminary election can drive the second fan Fan2.Phase-locked and phase place delays mould
Block 103 can output pulse width modulated signal be adjusted to pulse width again between 180 degree to 360 degree phase places
Signal generator module 101 processed, pulse width modulating signal generation module 101 can export positive pulse wave to the
Two fan Fan2 are to drive the second fan.Whole fan drive circuit 100 so circulates work, saves
Energy consumption during fans drive and reduce noise.
In the present embodiment, fan drive circuit 100 also includes the 3rd electric capacity C3 and resistance R1, the
Three electric capacity C3 are connected with earth terminal, and resistance R1 and the second electric capacity C2 is connected, the 3rd electric capacity C3 and resistance
R1 forms a filter circuit, for the triangular wave produced by pulse width modulating signal generation module 101
It is converted into square wave to drive the first fan Fan1 and the second fan Fan2.
In the present embodiment, fan drive circuit 100 can be applicable to desktop computer (DT), servomechanism
(Server), emergency power supply (EPS) and various switch (LANswitch) product.
Fig. 2 is the second embodiment of fan drive circuit 100 of the present invention.
In the present embodiment, compared with the embodiment shown in Fig. 1, fan drive circuit 100 is also
Export the second comparator U2 including three fan Fan3 and pulse wave, wherein, three fan Fan3 with
First fan Fan1 and the second fan Fan2 is in parallel, and is connected with dc source DC positive pole respectively.
In the present embodiment, pulse wave exports the second comparator U2 and includes first input end, second defeated
Entering end and output, pulse wave exports the first input end of the second comparator U2 and delays with phase place with phase-locked
Module 103 is connected, and pulse wave exports the second input and the pulse width modulating signal of the second comparator U2
Generation module 103 is connected, and pulse wave exports output and the three fan Fan3 phase of the second comparator U2
Even, it is used for exporting pulse wave to described three fan Fan3.
In the present embodiment, phase-locked and phase place is delayed module 103 and is produced with pulse width modulating signal
Raw module 101 connects, and phase-locked and phase place delays module 103 for producing the arteries and veins that phase difference is 120
Rush bandwidth modulation signals to pulse width modulating signal generation module 101.
Fig. 3 is the 3rd embodiment of fan drive circuit 100 of the present invention.
In the present embodiment, compared with the embodiment shown in Fig. 2, fan drive circuit 100 is also
Including the first switch K1, second switch K2 and the 3rd switch K3.First switch K1, second switch
K2 and the 3rd switch K3 the first electrode respectively with the first corresponding fan Fan1, the second fan
Fan2 and three fan Fan3 is connected.First switch K1, second switch K2 and the 3rd switch K3
The second electrode be connected with earth terminal respectively, first switch K1, second switch K2 and the 3rd switch
The pole that controls of K3 exports the first comparator U2 and arteries and veins with corresponding voltage comparator U1, pulse wave respectively
Ripple exports the output of the second comparator U2 and is connected.
First switch K1, second switch K2 and the 3rd switch K3 is the nonmetal FET of N-type,
First electrode of the first switch K1, second switch K2 and the 3rd switch K3 is N-type nonmetal field effect
Should the drain electrode of pipe, second electrode of the first switch K1, second switch K2 and the 3rd switch K3 is N
The source electrode of the nonmetal FET of type, opens the first switch K1, second switch K2 and the 3rd switch K3
The grid of the control nonmetal FET of extremely N-type.
When pulse width modulating signal generation module 101 exports positive pulse wave, the control of the first switch K1
Making extremely high level, the first switch K1 conducting, described first fan Fan1 starts working.
When pulse width modulating signal generation module 101 quits work, the control of the first switch K1
Extremely low level, the first fan Fan1 quits work, and the inductance in the first fan Fan1 utilizes
The pulse width modulating signal generation module 101 out-of-work time produces distracted primary current, and by institute
The distracted primary current produced is stored in the first electric capacity C1 and drives the second fan Fan2 in advance.
After the second fan Fan2 works a period of time, after i.e. 120 phase differences, pulse width is adjusted
Signal generator module 101 processed will quit work, the control of second switch K2 extremely low level, the
Two fan Fan2 also quit work.Inductance in second fan Fan2 utilizes pulse width modulation to believe
Number generation module 103 out-of-work time produces distracted primary current, and by produced distracted primary current
It is stored in the first electric capacity C1 and drives three fan Fan3 in advance.So circulation.
Additionally, in other embodiments, the fan in fan drive circuit can also be 4,5
Individual to n.
Thus, the fan drive circuit in the various embodiment of the present invention utilizes in previous stage fan
The distracted primary current that inductance produces at non-operative periods at pulse width modulating signal generation module 101 is in advance
Drive rear stage fan, saved fans drive power consumption and reduced noise.
Claims (8)
1. a fan drive circuit, for driving the first fan and the second fan, described first wind
Fan in parallel with the second fan and be connected with the positive pole of dc source respectively, it is characterised in that described wind
Fan drive circuit includes:
Pulse width modulating signal generation module, one end is connected with external power source, one end and described the
One fan and described second fan are connected, and are used for producing pulse wave and drive described first fan and described the
Two fans；
Phase-locked and phase place delays module, is connected with described pulse width modulating signal generation module, uses
In sending pulse width modulating signal to described pulse width modulating signal generation module so that described
Pulse width modulating signal generation module produces the pulse wave of out of phase difference；
Pulse wave exports the first comparator, including first input end, the second input and output, the
One input is connected and described phase-locked delays mould with phase place with described phase-locked module of delaying with phase place to obtain
The pulse width modulating signal that block produces, the second input input reference power source, output is connected to
Between described second fan and ground, for connecing according to described pulse width modulating signal generation module
Pulse pulse wave is exported to described second fan after receiving pulse width modulating signal；And
First electric capacity, is connected between positive pole and the ground of described dc source；
Wherein, the inductance during described fan drive circuit utilizes described first fan is at described pulse width
Degree modulated signal generation module produces distracted primary current at non-operative periods, and is stored up by described distracted primary current
It is stored in described first electric capacity, and utilizes described distracted primary current to drive described second fan in advance；
Wherein, described pulse width modulating signal generation module includes the second electric capacity and voltage ratio relatively
Device, described second electric capacity one end is electrically connected to described external power source, and described voltage comparator includes
One input, the second input and output, the first input end of described voltage comparator is with outside
Power supply is connected, and the second input of described voltage comparator is Voltage Reference end, and described voltage ratio is relatively
The output of device is connected with described second electric capacity and the first fan, and described voltage comparator is according to described
With the magnitude relationship of reference voltage, outer power voltage determines that described pulse width modulating signal produces mould
The duty of block.
2. fan drive circuit as claimed in claim 1, it is characterised in that
Wherein, when the external voltage source voltage of described voltage comparator is more than described voltage comparator
During reference voltage, described voltage comparator output output high level signal adjusts to described pulse width
Signal generator module processed so that described pulse width modulating signal generation module exports positive pulse wave, makes
Obtain described pulse width modulating signal generation module and be in the work period；
When the external voltage source of described voltage comparator is less than the reference voltage of described voltage comparator
Time, the output output low level signal of described voltage comparator gives described pulse width modulating signal
Generation module so that described pulse width modulating signal generation module is in described non-operative periods.
3. fan drive circuit as claimed in claim 1, it is characterised in that described lock phase and phase
Position is delayed module and is connected with described pulse width modulating signal generation module, described phase-locked prolongs with phase place
Rear module is for producing pulse width modulating signal that phase difference is 180 to described pulse width modulation
Signal generator module.
4. fan drive circuit as claimed in claim 2, it is characterised in that described fans drive
Circuit also includes that the 3rd electric capacity and resistance, described 3rd electric capacity are connected to the ground, and described resistance is with described
Second electric capacity is connected, and described 3rd electric capacity and described resistance form a filter circuit, for by described
Triangular wave produced by pulse width modulating signal generation module is converted into square wave for driving described
One fan and described second fan.
5. fan drive circuit as claimed in claim 2, it is characterised in that also include:
Three fan, in parallel with described first fan and described second fan, and respectively with described directly
Stream positive source is connected；
Pulse wave exports the second comparator, described pulse wave export the second comparator include first input end,
Second input and output, described pulse wave exports the first input end of the second comparator and described lock
Phase and phase position is delayed module and is connected, and described pulse wave exports the second input of the second comparator with described
Pulse width modulating signal generation module is connected, described pulse wave export the output of the second comparator with
Three fan is connected, and is used for exporting pulse wave to described three fan.
6. fan drive circuit as claimed in claim 5, it is characterised in that described lock phase and phase
Position is delayed module and is connected with described pulse width modulating signal generation module, described phase-locked prolongs with phase place
Rear module is for producing pulse width modulating signal that phase difference is 120 to described pulse width modulation
Signal generator module.
7. fan drive circuit as claimed in claim 5, it is characterised in that described fans drive
Circuit also includes the first switch, second switch and the 3rd switch, described first switch, second switch
And the 3rd switch the first electrode respectively with corresponding described first fan, the second fan and the 3rd wind
Fan be connected, described first switch, second switch and the 3rd switch the second electrode respectively with earth terminal
Be connected, described first switch, second switch and the 3rd switch control pole respectively with corresponding described in
Voltage comparator, pulse wave export the first comparator and pulse wave exports the output phase of the second comparator
Even；
When described pulse width modulating signal generation module exports positive pulse wave, described first switch
Controlling extremely high level, described first switch conduction, described first fan is started working；
When described pulse width modulating signal generation module quits work, the control of described first switch
Making extremely low level, described first fan quits work, and the inductance in described first fan utilizes
The described pulse width modulating signal generation module out-of-work time produces distracted primary current, and by institute
The distracted primary current produced is stored in described first electric capacity and drives described second fan in advance.
8. fan drive circuit as claimed in claim 7, it is characterised in that described first opens
Close, second switch and the 3rd switch for the nonmetal FET of N-type, described first switch, second
Switch and the drain electrode that the first electrode is the nonmetal FET of N-type of the 3rd switch, described first opens
Pass, second switch and the source electrode that the second electrode is the nonmetal FET of N-type of the 3rd switch, institute
State the grid of the control nonmetal FET of extremely N-type of the first switch, second switch and the 3rd switch
Pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310084345.5A CN104065309B (en) | 2013-03-18 | 2013-03-18 | Fan drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310084345.5A CN104065309B (en) | 2013-03-18 | 2013-03-18 | Fan drive circuit |
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| Publication Number | Publication Date |
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| CN104065309A CN104065309A (en) | 2014-09-24 |
| CN104065309B true CN104065309B (en) | 2016-09-07 |
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| CN201310084345.5A Active CN104065309B (en) | 2013-03-18 | 2013-03-18 | Fan drive circuit |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6392370B1 (en) * | 2000-01-13 | 2002-05-21 | Bedini Technology, Inc. | Device and method of a back EMF permanent electromagnetic motor generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6774587B2 (en) * | 2001-09-25 | 2004-08-10 | Siemens Vdo Automotive Inc. | Multiple brush-type motor control apparatus and method |
| DE10336512B4 (en) * | 2002-08-08 | 2015-12-17 | Denso Corporation | Control device for PWM control of two inductive loads with reduced generation of electrical noise |
| CN100346568C (en) * | 2003-12-03 | 2007-10-31 | 台达电子工业股份有限公司 | Motor control circuit |
| CN101408186B (en) * | 2008-11-21 | 2011-08-10 | 中兴通讯股份有限公司 | Fan control device and method as well as multiple-fan control device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6392370B1 (en) * | 2000-01-13 | 2002-05-21 | Bedini Technology, Inc. | Device and method of a back EMF permanent electromagnetic motor generator |
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Denomination of invention: Fan drive circuit Effective date of registration: 20210531 Granted publication date: 20160907 Pledgee: Weitang sub branch of Zhejiang Jiashan Rural Commercial Bank Co.,Ltd. Pledgor: Jiashan Weitang Asset Management Co.,Ltd. Registration number: Y2021980004130 |
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Denomination of invention: Fan drive circuit Effective date of registration: 20231127 Granted publication date: 20160907 Pledgee: Weitang sub branch of Zhejiang Jiashan Rural Commercial Bank Co.,Ltd. Pledgor: Jiashan Weitang Asset Management Co.,Ltd. Registration number: Y2023330002807 |
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