CN207598547U - A kind of radiator fan speed-regulating control circuit - Google Patents
A kind of radiator fan speed-regulating control circuit Download PDFInfo
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- CN207598547U CN207598547U CN201721547635.9U CN201721547635U CN207598547U CN 207598547 U CN207598547 U CN 207598547U CN 201721547635 U CN201721547635 U CN 201721547635U CN 207598547 U CN207598547 U CN 207598547U
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Abstract
The utility model discloses a kind of radiator fan speed-regulating control circuits, are related to automation field, including temperature collection circuit, pulse width modulation circuit and driving circuit, wherein：Temperature collection circuit is used for the real time temperature signal of collecting device, and real time temperature signal is obtained the difference signal of real time temperature signal and operating tempera-ture signal compared with the equipment operating tempera-ture signal set；Pulse width modulation circuit is used for using difference signal as modulating wave, and modulating wave and triangular carrier be modulated to obtain the pwm signal for controlling rotation speed of the fan；Driving circuit is for being driven fan according to pwm signal, to adjust rotation speed of the fan, the real time temperature of equipment is made to level off to the equipment operating temperature of setting.Radiator fan speed-regulating control circuit provided by the utility model can adjust the rotating speed of radiator fan in real time according to the temperature of equipment, not only reduce energy consumption, economize on resources, and make equipment more safe and reliable.
Description
Technical field
The utility model is related to automation fields, and in particular to a kind of radiator fan speed-regulating control circuit.
Background technology
With the rapid development of communication technology, the power consumption of communication equipment is increasing, the heat dissipation performance of equipment just seems outstanding
Its is important.The current air-cooled mode of generally use radiates for communication equipment, and fan slave device side sucking cold air, cold air exists
After being cooled down to equipment, flowed out from opposite side, so as to reduce the operating temperature of communication equipment.
In the prior art, the mode of common fan cooling is fan full speed running, is come pair with maximum rotation speed of the fan always
Communication equipment radiates, on the one hand, rotation speed of the fan is higher, and noise also can be bigger, it will generates larger noise, noise pollution
Seriously, poor user experience, on the other hand, in most cases fan does not need to meet equipment under work full-speed state yet
Radiating requirements, the mode of such full speed running will increase energy consumption, waste of resource, and fan easily breaks down, to equipment safety
Operation causes a hidden trouble.
Utility model content
For defect in the prior art, the purpose of this utility model is to provide a kind of radiator fan speed regulating controls
Circuit can adjust the rotating speed of radiator fan in real time according to the temperature of equipment, not only reduce energy consumption, economize on resources, and make to set
It is standby more safe and reliable.
To achieve the above objectives, the technical scheme adopted by the utility model is that：
A kind of radiator fan speed-regulating control circuit, including temperature collection circuit, pulse width modulation circuit and driving circuit,
Wherein：
The temperature collection circuit is used for the real time temperature signal of collecting device, and by the real time temperature signal with setting
Equipment operating tempera-ture signal compare, obtain the difference signal of the real time temperature signal and operating tempera-ture signal；
The pulse width modulation circuit is used for using the difference signal as modulating wave, and by the modulating wave and triangle
Carrier wave is modulated to obtain the pwm signal for controlling rotation speed of the fan；
The driving circuit, to adjust rotation speed of the fan, makes equipment for being driven according to the pwm signal to fan
Real time temperature levels off to the equipment operating temperature of setting.
Based on the above technical solution, the temperature collection circuit include the first operational amplifier U1, resistance R3, can
Resistance R13, resistance R7, resistance R2, thermal resistance R14, resistance R9, resistance R6 and capacitance C1, the thermal resistance R14 are adjusted for detecting
The real time temperature of equipment, the adjustable resistance R13 are used for the operating temperature of set device, power supply VCC by the resistance R3 and
Adjustable resistance R13 is divided and the reverse input end of the first operational amplifier U1, power supply is linked into after the resistance R7 that connects
VCC is divided by the resistance R2 and thermal resistance R14 and the first operational amplifier U1 is linked into after the resistance R9 that connects
Positive input, the reverse input end of the first operational amplifier U1 and defeated is connected after the resistance R6 and capacitance C1 parallel connections
Outlet.
Based on the above technical solution, it is additionally provided with one between the temperature collection circuit and pulse width modulation circuit
For handling the PID control circuit of the difference signal, the PID control circuit includes proportional unit, integral unit and differential
Unit and addition unit are connected after the proportional unit, integral unit differentiation element parallel connection with the addition unit.
Based on the above technical solution, the proportional unit includes second operational amplifier U2, adjustable resistance R8, electricity
R4 and resistance R10 is hindered, the output terminal of the temperature collection circuit is linked into second operation by the adjustable resistance R8 and puts
The reverse input end of big device U2, the reverse input end and output terminal of the resistance R4 connections second operational amplifier U2, institute
The positive input for stating second operational amplifier U2 is grounded by the resistance R10；
The integral unit includes third operational amplifier U3, adjustable resistance R17, capacitance C6 and resistance R20, the temperature
The output terminal of Acquisition Circuit is linked into the reverse input end of the third operational amplifier U3, institute by the adjustable resistance R17
The reverse input end and output terminal of the capacitance C6 connections third operational amplifier U3 is stated, the third operational amplifier U3 is just
It is grounded to input terminal by the resistance R20；
The differentiation element include four-operational amplifier U4, resistance R25, capacitance C9, capacitance C8, adjustable resistance R23 and
Resistance R26, the output terminal of the temperature collection circuit are linked into the 4th fortune after being sequentially connected in series the resistance R25 and capacitance C9
The reverse input end of amplifier U4 is calculated, the four-operational amplifier U4 is connected after the capacitance C8 and adjustable resistance R23 parallel connections
Reverse input end and output terminal, the positive input of the four-operational amplifier U4 is grounded by the resistance R26；
The addition unit includes the 5th operational amplifier U5, resistance R11 and resistance R19, the 5th operational amplifier
The reverse input end of U5 and the output terminal of the second operational amplifier U2, the output terminal of the third operational amplifier U3, institute
The output terminal for stating four-operational amplifier U4 is connected, and resistance R11 connections the 5th operational amplifier U5's is reversed defeated
Enter end and output terminal, the positive input of the 5th operational amplifier U5 is grounded by the resistance R19.
Based on the above technical solution, the pulse width modulation circuit includes occurring for emitting the signal of carrier wave
Unit and the 6th operational amplifier U6, the reverse input end of the 6th operational amplifier U6 and the signal generating unit phase
Even, the positive input of the 6th operational amplifier U6 is connected with the output terminal of the addition unit, and the 6th operation is put
Big device U6 output terminals are connected with the driving circuit.
Based on the above technical solution, the temperature collection circuit further includes voltage conversion unit, and the voltage turns
Unit, which is changed, for 12V voltages to be converted into be ± 6V the voltages of the first operational amplifier U1 power supplies.
Based on the above technical solution, the voltage conversion unit includes resistance R1, resistance R5, capacitance C2, capacitance
C3, capacitance C5, the first zener diode D1 and the second zener diode D2, the capacitance C5 and the first zener diode D1 are in parallel
After be grounded, described resistance R5 one end ground connection and be connected with the capacitance C5, the other end is connected with 12V power supplys, the capacitance C2, electricity
It is in parallel to hold C3 and the second zener diode D2, described capacitance C2 one end is grounded, and the other end is electric with 12V after connecting with the resistance R1
Source is connected, the capacitance C5 other ends.
Based on the above technical solution, the thermal resistance R14 models PT1000.
Compared with prior art, the utility model has the advantage of：
(1) the utility model radiator fan speed-regulating control circuit can adjust radiator fan in real time according to the temperature of equipment
Rotating speed, when the real time temperature of equipment deviates the operating temperature of setting, the duty ratio of the pwm signal of adjustment control rotation speed of the fan,
So as to adjust rotation speed of the fan, the real time temperature of equipment is made to level off to the operating temperature of setting, energy consumption is not only reduced, economizes on resources,
And make equipment more safe and reliable；
(2) temperature collection circuit of the utility model is made of the first operational amplifier, resistance, capacitance, circuit structure letter
It is single, it is easy to accomplish, cost is relatively low.
(3) the radiator fan speed-regulating control circuit of the utility model further includes PID control circuit, due to temperature collection circuit
There is hysteresis quality, time variation, non-linear, proportional unit can be amplified difference signal processing, to reach pulse
Signal strength needed for width modulation circuit, integral unit can carry out Integral Processing to difference signal, eliminate systematic steady state and miss
Difference, differentiation element can to difference signal carry out differential process, accelerate system response time, attenuation systems overshoot trend, so as to
So that the temperature control effect of radiator fan speed-regulating control circuit is more preferable.
(4) the radiator fan speed-regulating control circuit of the utility model further includes voltage conversion unit, can turn 12V voltages
It changes ± 6V voltages into, can be that the first operational amplifier U1 powers, it is more convenient to use.
Description of the drawings
Fig. 1 is the structure diagram of radiator fan speed-regulating control circuit in the utility model embodiment；
Fig. 2 is the circuit diagram of temperature collection circuit in the utility model embodiment；
Fig. 3 is the circuit diagram of PID control circuit in the utility model embodiment；
Fig. 4 is the circuit diagram of pulse width modulation circuit in the utility model embodiment.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and embodiments.
Shown in Figure 1, the utility model embodiment provides a kind of radiator fan speed-regulating control circuit, including temperature acquisition
Circuit, PID control circuit, pulse width modulation circuit and driving circuit.
Temperature collection circuit be used for collecting device real time temperature signal, and by real time temperature signal with setting equipment work
Compare as temperature signal, obtain the difference signal of real time temperature signal and operating tempera-ture signal；Pulse width modulation circuit is used for
Using difference signal as modulating wave, and modulating wave and triangular carrier are modulated to obtain that the PWM of rotation speed of the fan is controlled to believe
Number；Driving circuit, to adjust rotation speed of the fan, approaches the real time temperature of equipment for being driven according to pwm signal to fan
In the equipment operating temperature of setting.PID control circuit is set between temperature collection circuit and pulse width modulation circuit, and is used for
Handle difference signal.
Shown in Figure 2, temperature collection circuit includes the first operational amplifier U1, resistance R3, adjustable resistance R13, resistance
R7, resistance R2, thermal resistance R14, resistance R9, resistance R6 and capacitance C1, thermal resistance R14 are used for the real time temperature of detection device, can
Resistance R13 is adjusted to be used for the operating temperature of set device, power supply VCC is by resistance R3 and adjustable resistance R13 partial pressures and series resistance
The reverse input end of the first operational amplifier U1 is linked into after R7, power supply VCC is divided and connected by resistance R2 and thermal resistance R14
It is linked into the positive input of the first operational amplifier U1 after resistance R9, connecting the first operation after resistance R6 and capacitance C1 parallel connections puts
The reverse input end and output terminal of big device U1.The temperature collection circuit of the utility model is by the first operational amplifier, resistance, capacitance
Composition, circuit structure are simple, it is easy to accomplish, cost is relatively low.
Preferably, thermal resistance R14 models PT1000, the thermal resistance R14 resistance value at 0 DEG C are 1000 ohm, at 300 DEG C
When resistance value be about 2120.515 ohm, resistance value is changed linearly with temperature, and the real time temperature of detection device is relatively reliable.
Further, temperature collection circuit further includes voltage conversion unit, and voltage conversion unit is used to convert 12V voltages
± 6V the voltages of the first operational amplifiers of Cheng Kewei U1 power supplies can be that the first operational amplifier U1 and other operational amplifiers supply
Electricity, it is more convenient to use.
Specifically, voltage conversion unit includes resistance R1, resistance R5, capacitance C2, capacitance C3, capacitance C5, the first voltage stabilizing two
Be grounded after pole pipe D1 and the second zener diode D2, capacitance C5 and the first zener diode D1 parallel connections, resistance R5 one end ground connection and
It is connected with capacitance C5, the other end is connected with 12V power supplys, and capacitance C2, capacitance C3 and the second zener diode D2 are in parallel, capacitance C2 mono-
End ground connection, the other end are connected after connecting with resistance R1 with 12V power supplys, the capacitance C5 other ends.By resistance R5 and the first voltage stabilizing two
Pole pipe D1 is the -6V voltages of+6V voltages and negative supply that can obtain operational amplifier positive supply, so as to all in circuit
Operational amplifier carries out Symmetrical power supply power supply.
Shown in Figure 2, PID control circuit includes proportional unit, integral unit and differentiation element and addition unit, ratio
It connects after unit, integral unit differentiation element parallel connection with addition unit.
Specifically, proportional unit is adopted including second operational amplifier U2, adjustable resistance R8, resistance R4 and resistance R10, temperature
The output terminal of collector is linked into the reverse input end of second operational amplifier U2, resistance R4 connections second by adjustable resistance R8
The reverse input end and output terminal of operational amplifier U2, the positive input of second operational amplifier U2 are grounded by resistance R10.
Integral unit includes third operational amplifier U3, adjustable resistance R17, capacitance C6 and resistance R20, temperature collection circuit
Output terminal be linked into the reverse input end of third operational amplifier U3, capacitance C6 connection third operations by adjustable resistance R17
The reverse input end and output terminal of amplifier U3, the positive input of third operational amplifier U3 are grounded by resistance R20.
Differentiation element includes four-operational amplifier U4, resistance R25, capacitance C9, capacitance C8, adjustable resistance R23 and resistance
R26, the output terminal of temperature collection circuit are linked into the reversed of four-operational amplifier U4 after being sequentially connected in series resistance R25 and capacitance C9
Connect the reverse input end and output terminal of four-operational amplifier U4 after input terminal, capacitance C8 and adjustable resistance R23 parallel connections, the 4th
The positive input of operational amplifier U4 is grounded by resistance R26.
Addition unit includes the 5th operational amplifier U5, resistance R11 and resistance R19, and the 5th operational amplifier U5's is reversed
Input terminal and the output terminal of second operational amplifier U2, the output terminal of third operational amplifier U3, four-operational amplifier U4
Output terminal is connected, the reverse input end and output terminal of the 5th operational amplifier U5 of resistance R11 connections, the 5th operational amplifier U5
Positive input by resistance R19 be grounded.
Since temperature collection circuit has the characteristics that hysteresis quality, time variation, non-linear, proportional unit can be to difference signal
Processing is amplified, to reach the signal strength needed for pulse width modulation circuit, integral unit can carry out difference signal
Integral Processing eliminates systematic steady state error, and differentiation element can carry out differential process to difference signal, accelerate system response speed
Degree, attenuation systems overshoot trend, so that the temperature control effect of radiator fan speed-regulating control circuit is more preferable.
Shown in Figure 4, pulse width modulation circuit includes signal generating unit and the 6th operation for emitting carrier wave
Amplifier U6, the reverse input end of the 6th operational amplifier U6 are connected with signal generating unit, and the 6th operational amplifier U6 is just
It is connected to input terminal with the output terminal of addition unit, the 6th operational amplifier U6 output terminals are connected with driving circuit.
Specifically, signal generating unit includes timer NE555, capacitance C11, triode Q1, triode Q2, triode
Q3, triode Q4, triode Q5, resistance R21, resistance R28 and capacitance C10, power supply VCC by triode Q1, triode Q2 and
Resistance R21 charges to capacitance C11, and ground terminal discharges to capacitance C11 by triode Q4, triode Q5 and resistance R28, triode
The 6th pin and capacitance C11 of the base stage connection timer NE555 of Q3, the of the collector connection timer NE555 of triode Q3
8 pins and power supply VCC, the emitter of triode Q3 are linked into the reverse input end of the 6th operational amplifier U6 by capacitance C10.
The operation principle of the utility model radiator fan speed-regulating control circuit is：By adjusting adjustable resistance R13, be allowed to
The equipment operating temperature of setting matches, and passes through the real time temperature of thermal resistance R14 detection devices, the first operational amplifier U1 ratios
Compared with the real time temperature signal of equipment and the operating tempera-ture signal of setting, when the real time temperature of equipment is higher than the operating temperature set
When, the first operational amplifier U1 exports the difference signal of high level, and the difference signal is single by proportional unit, integration respectively
After member and differentiation element processing, low level difference signal is obtained, and be sent to the reverse input end of the 5th operational amplifier U5,
5th operational amplifier U5 carries out reversed add operation to it, obtains the control signal of the pulse width modulation circuit of high level
PWM_CON, and control signal PWM_CON is modulated as modulating wave and triangular carrier, increase the PWM of control rotation speed of the fan
The duty ratio of signal exports corresponding pwm signal, and driving circuit is driven fan according to pwm signal, improves fan and turns
Speed reduces the real time temperature of equipment, is allowed to level off to the equipment operating temperature of setting.Similarly, when the real time temperature of equipment is less than
During the operating temperature of setting, reduce the duty ratio of pwm signal, reduce rotation speed of the fan, the real time temperature of equipment is improved, when equipment
When real time temperature is equal to the operating temperature of setting, the duty ratio for maintaining pwm signal is constant, does not change rotation speed of the fan.
The utility model radiator fan speed-regulating control circuit can adjust turning for radiator fan in real time according to the temperature of equipment
Speed, when the real time temperature of equipment deviates the operating temperature of setting, the duty ratio of the pwm signal of adjustment control rotation speed of the fan, from
And rotation speed of the fan is adjusted, the real time temperature of equipment is made to level off to the operating temperature of setting, energy consumption is not only reduced, economizes on resources, and
And make equipment more safe and reliable.
The utility model is not limited to the above embodiment, for those skilled in the art, not
Under the premise of being detached from the utility model principle, several improvements and modifications can also be made, these improvements and modifications are also considered as this reality
Within novel protection domain.The content not being described in detail in this specification belongs to well known to professional and technical personnel in the field
The prior art.
Claims (8)
1. a kind of radiator fan speed-regulating control circuit, which is characterized in that including temperature collection circuit, pulse width modulation circuit and
Driving circuit, wherein：
The temperature collection circuit is used for the real time temperature signal of collecting device, and the real time temperature signal is set with what is set
Standby operating tempera-ture signal compares, and obtains the difference signal of the real time temperature signal and operating tempera-ture signal；
The pulse width modulation circuit is used for using the difference signal as modulating wave, and by the modulating wave and triangular carrier
It is modulated to obtain the pwm signal for controlling rotation speed of the fan；
The driving circuit, to adjust rotation speed of the fan, makes the real-time of equipment for being driven according to the pwm signal to fan
Temperatures approach is in the equipment operating temperature of setting.
2. radiator fan speed-regulating control circuit as described in claim 1, it is characterised in that：The temperature collection circuit includes the
One operational amplifier U1, resistance R3, adjustable resistance R13, resistance R7, resistance R2, thermal resistance R14, resistance R9, resistance R6 and capacitance
C1, the thermal resistance R14 are used for the real time temperature of detection device, and the adjustable resistance R13 is used for the operating temperature of set device,
Power supply VCC is divided by the resistance R3 and adjustable resistance R13 and is linked into first operation after the resistance R7 that connects and puts
The reverse input end of big device U1, power supply VCC are divided by the resistance R2 and thermal resistance R14 and are accessed after the resistance R9 that connects
First operation is connected to the positive input of the first operational amplifier U1, after the resistance R6 and capacitance C1 parallel connections to put
The reverse input end and output terminal of big device U1.
3. radiator fan speed-regulating control circuit as described in claim 1, it is characterised in that：The temperature collection circuit and pulse
One is additionally provided between width modulation circuit for handling the PID control circuit of the difference signal, the PID control circuit includes
Proportional unit, integral unit and differentiation element and addition unit, after the proportional unit, integral unit differentiation element parallel connection with institute
State addition unit series connection.
4. radiator fan speed-regulating control circuit as claimed in claim 3, it is characterised in that：The proportional unit includes the second fortune
Amplifier U2, adjustable resistance R8, resistance R4 and resistance R10 are calculated, the output terminal of the temperature collection circuit passes through the adjustable electric
Resistance R8 is linked into the reverse input end of the second operational amplifier U2, the resistance R4 connections second operational amplifier U2
Reverse input end and output terminal, the positive input of the second operational amplifier U2 is grounded by the resistance R10；
The integral unit includes third operational amplifier U3, adjustable resistance R17, capacitance C6 and resistance R20, the temperature acquisition
The output terminal of circuit is linked into the reverse input end of the third operational amplifier U3, the electricity by the adjustable resistance R17
Hold the reverse input end and output terminal of the C6 connections third operational amplifier U3, the forward direction of the third operational amplifier U3 is defeated
Enter end to be grounded by the resistance R20；
The differentiation element includes four-operational amplifier U4, resistance R25, capacitance C9, capacitance C8, adjustable resistance R23 and resistance
R26, the output terminal of the temperature collection circuit, which is sequentially connected in series after the resistance R25 and capacitance C9, to be linked into the 4th operation and puts
The reverse input end of big device U4, the anti-of the four-operational amplifier U4 is connected after the capacitance C8 and adjustable resistance R23 parallel connections
To input terminal and output terminal, the positive input of the four-operational amplifier U4 is grounded by the resistance R26；
The addition unit includes the 5th operational amplifier U5, resistance R11 and resistance R19, the 5th operational amplifier U5's
The output terminal of reverse input end and the second operational amplifier U2, the output terminal of the third operational amplifier U3, described the
The output terminal of four-operational amplifier U4 is connected, the reverse input end of resistance R11 connections the 5th operational amplifier U5
And output terminal, the positive input of the 5th operational amplifier U5 are grounded by the resistance R19.
5. radiator fan speed-regulating control circuit as claimed in claim 3, it is characterised in that：The pulse width modulation circuit packet
Include the signal generating unit and the 6th operational amplifier U6 for emitting carrier wave, the reversed input of the 6th operational amplifier U6
End is connected with the signal generating unit, the output of the positive input and the addition unit of the 6th operational amplifier U6
End is connected, and the 6th operational amplifier U6 output terminals are connected with the driving circuit.
6. radiator fan speed-regulating control circuit as claimed in claim 2, it is characterised in that：The temperature collection circuit further includes
Voltage conversion unit, it can be that the first operational amplifier U1 powers that the voltage conversion unit, which is used to 12V voltages being converted into,
± 6V voltages.
7. radiator fan speed-regulating control circuit as claimed in claim 6, it is characterised in that：The voltage conversion unit includes electricity
Hinder R1, resistance R5, capacitance C2, capacitance C3, capacitance C5, the first zener diode D1 and the second zener diode D2, the capacitance
Be grounded, described resistance R5 one end ground connection and be connected with the capacitance C5 after C5 and the first zener diode D1 parallel connections, the other end with
12V power supplys are connected, and the capacitance C2, capacitance C3 and the second zener diode D2 are in parallel, capacitance C2 one end ground connection, the other end
It is connected after connecting with the resistance R1 with 12V power supplys, the capacitance C5 other ends.
8. radiator fan speed-regulating control circuit as claimed in claim 2, it is characterised in that：The thermal resistance R14 models
PT1000。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721547635.9U CN207598547U (en) | 2017-11-20 | 2017-11-20 | A kind of radiator fan speed-regulating control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721547635.9U CN207598547U (en) | 2017-11-20 | 2017-11-20 | A kind of radiator fan speed-regulating control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN207598547U true CN207598547U (en) | 2018-07-10 |
Family
ID=62760858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721547635.9U Active CN207598547U (en) | 2017-11-20 | 2017-11-20 | A kind of radiator fan speed-regulating control circuit |
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| Country | Link |
|---|---|
| CN (1) | CN207598547U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117148774A (en) * | 2023-10-20 | 2023-12-01 | 广州吉谷电器有限公司 | Heat dissipation control system and control circuit of air fryer |
-
2017
- 2017-11-20 CN CN201721547635.9U patent/CN207598547U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117148774A (en) * | 2023-10-20 | 2023-12-01 | 广州吉谷电器有限公司 | Heat dissipation control system and control circuit of air fryer |
| CN117148774B (en) * | 2023-10-20 | 2024-03-19 | 广州吉谷电器有限公司 | Heat dissipation control system and control circuit of air fryer |
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Effective date of registration: 20190628 Address after: 430000 Guanghuo Road Optical Communication Industry Building, Guandong Industrial Park, Donghu Development Zone, Wuhan City, Hubei Province, 1st Floor Patentee after: Beacon Fire Ultra-micro Information Technology Co., Ltd. Address before: 430000 No. 6, High-tech Fourth Road, Donghu High-tech Development Zone, Wuhan City, Hubei Province Patentee before: Fenghuo Communication Science &. Technology Co., Ltd. |
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