CN213953958U - Fan rotation speed control device and electronic equipment - Google Patents
Fan rotation speed control device and electronic equipment Download PDFInfo
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- CN213953958U CN213953958U CN202022038643.9U CN202022038643U CN213953958U CN 213953958 U CN213953958 U CN 213953958U CN 202022038643 U CN202022038643 U CN 202022038643U CN 213953958 U CN213953958 U CN 213953958U
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Abstract
The embodiment of the utility model discloses fan rotational speed controlling means, electronic equipment, fan rotational speed controlling means includes temperature acquisition unit, the control unit, fan drive unit and power supply. The fan driving unit includes: the amplification module is used for receiving the rotating speed control signal and amplifying the rotating speed control signal to obtain an amplified signal; the switch module is connected with the amplifying module; the fan control circuit is used for changing the self switch state based on the amplified signal to realize the rotation speed adjustment of the fan. The utility model provides a fan speed control device performance is more stable, both can the energy saving, can reduce the fan again and be in high-speed pivoted loss and noise, extension fan life-span for a long time.
Description
Technical Field
The utility model relates to the field of electronic technology, especially, relate to a fan speed control device, electronic equipment.
Background
Fans are common heat dissipation tools and have been widely used in various electronic devices, such as communication products, optoelectronic products, consumer electronics products, medical devices, automobile refrigerators, welders, induction cookers, audio devices, environmental protection devices, and the like.
At present, fans are installed on most electronic equipment for heat dissipation, but fan rotating speed control devices are not installed on some electronic equipment, so that the fans are in high-speed rotation for a long time, the loss is large, and meanwhile, noise generated when the fans rotate is also large. Since the fan is a mechanical device, long-term high-speed operation may shorten the life of the fan, resulting in early failure of the fan.
Disclosure of Invention
In view of the above, it is necessary to provide a fan rotation speed control device and an electronic apparatus.
The utility model discloses a technical means be: a fan speed control apparatus, the apparatus comprising:
the temperature acquisition unit is used for acquiring the temperature inside the electronic equipment;
the control unit is connected with the temperature acquisition unit and used for outputting a rotating speed control signal according to the temperature;
the fan driving unit is connected with the control unit and used for driving the fan to rotate according to the rotating speed control signal; and
the power supply is used for supplying power to the fan rotating speed control device;
the fan driving unit includes:
the amplification module is used for receiving the rotating speed control signal and amplifying the rotating speed control signal to obtain an amplified signal;
the switch module is connected with the amplifying module; the fan control circuit is used for changing the self switch state based on the amplified signal to realize the rotation speed adjustment of the fan.
The utility model discloses another technical means who adopts is: an electronic device, the electronic device comprising: a fan and a fan speed control device.
Since the technical scheme is used, the utility model provides a fan rotational speed controlling means, electronic equipment, fan rotational speed controlling means sets up temperature acquisition unit, the control unit, fan drive unit and power supply, the control unit basis the inside temperature of electronic equipment that the temperature acquisition unit gathered, output rotational speed control signal drive fan drive unit drive fan rotates, controls the rotational speed of fan. The fan driving unit can accurately control the rotating speed of the fan by arranging the amplifying module and the switch module. The utility model provides a fan speed control device performance is more stable, both can the energy saving, can reduce the fan again and be in high-speed pivoted loss and noise, extension fan life-span for a long time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Wherein:
FIG. 1 is a first schematic diagram illustrating a first exemplary embodiment of a fan speed control apparatus;
FIG. 2 is a second schematic structural diagram of a fan speed control apparatus according to an embodiment;
FIG. 3 is a third schematic structural diagram of a fan speed control apparatus according to an embodiment;
FIG. 4 is a schematic circuit diagram of a fan drive unit in one embodiment;
FIG. 5 is a schematic diagram of a temperature acquisition unit circuit in one embodiment;
FIG. 6 is a schematic diagram of a single-chip microcomputer circuit of the control unit in one embodiment;
FIG. 7 is a schematic circuit diagram of a download debug interface module, a crystal oscillator module, a reset module, and a decoupling module of the control unit in one embodiment;
FIG. 8 is a schematic diagram of a power supply circuit in one embodiment;
FIG. 9 is a schematic circuit diagram of a fan speed control apparatus in one embodiment.
In the figure: 1. a fan rotation speed control device; 2. a fan; 11. a temperature acquisition unit; 12. a control unit; 13. a fan driving unit; 14. a power supply; 121. a single chip microcomputer; 122. a reset module; 123. a crystal oscillator module; 124. downloading a debugging interface module; 125. a decoupling module; 131. an amplifying module; 132. a switch module; 141. a surge protection module; 142. a filtering module; 143. a switching power supply module; 144. and a voltage stabilizing module.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The terms first, second and the like in the description and in the claims, and in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be practiced otherwise than as specifically illustrated.
The utility model provides a fan speed control device 1, as shown in fig. 1, in an embodiment, the fan speed control device 1 may include a temperature acquisition unit 11, a control unit 12, a fan driving unit 13 and a power supply 14, the temperature acquisition unit 11 is used for acquiring the temperature inside the electronic equipment; the control unit 12 is connected with the temperature acquisition unit 11 and is used for outputting a rotating speed control signal according to the temperature; the fan driving unit 13 is connected with the control unit 12 and is used for driving the fan 2 to rotate according to the rotating speed control signal; and the power supply 14 is used for supplying power to the fan rotating speed control device 1; further, the fan driving unit 13 may include an amplifying module 131 and a switching module 132, where the amplifying module 131 is configured to receive the rotation speed control signal, and amplify the rotation speed control signal to obtain an amplified signal; the switch module 132 is connected with the amplifying module 131; for changing its on-off state based on the amplified signal to achieve the rotational speed adjustment of the fan 2.
In the fan rotation speed control device 1 provided in this embodiment, the fan rotation speed control device 1 is provided with a temperature acquisition unit 11, a control unit 12, a fan driving unit 13 and a power supply 14, the control unit 12 outputs a rotation speed control signal according to the temperature inside the electronic device acquired by the temperature acquisition unit 11 to drive the fan driving unit 13 to drive the fan 2 to rotate, so as to control the rotation speed of the fan 2, and the fan driving unit 13 is provided with an amplification module 131 and a switch module 132 to accurately control the rotation speed of the fan 2. The utility model provides a fan rotational speed controlling means 1 performance is more stable, both can the energy saving, can reduce the fan again and be in high-speed pivoted loss and noise, extension fan life-span for a long time.
In an embodiment, as shown in fig. 3, which is a further improved embodiment based on the above embodiment, the power supply 14 may include a surge protection module 141, a filter module 142, a switching power supply module 143, and a voltage regulation module 144, where the surge protection module 141 is configured to perform surge protection on an input dc voltage and supply the input dc voltage to the filter module 142; the filtering module 142 is configured to filter the voltage output by the surge protection module 141 and supply the filtered voltage to the switching power supply module 143; the switching power supply module 143 is configured to perform voltage reduction processing on the voltage output by the filtering module 142, and obtain a first voltage to be supplied to the voltage stabilizing module 144; the voltage stabilizing module 144 is configured to perform voltage reduction and voltage stabilization on the first voltage, and obtain a second voltage to supply to the fan rotation speed control apparatus 1. The power supply 14 has a power supply end and a ground end GND, and the power supply 14 may provide a power supply voltage of an operating voltage, such as 12V, 5V, and 3.3V, for the fan speed control apparatus 1, or the power supply voltage may be a voltage value required by other adaptations.
Specifically, as shown in fig. 8, the dc power input terminal J1 is connected to a dc power supply, and further, the dc power supply can provide a dc voltage of 12V. The power supply 14 can provide three working voltages, which are +12V, +5V and +3.3V, for the fan speed control device 1, that is, the first power end of the power supply 14 outputs +12V, the second power end of the power supply 14 outputs +5V, and the third power end of the power supply 14 outputs + 3.3V. That is to say, the dc power supply provides 12V dc voltage, the voltage output after passing through the surge protection module 141 and the filtering module 142 is +12V, and the voltage +12V is the voltage output by the first power end of the power supply 14; then, the voltage reduction processing of the switching power supply module 143 is performed to obtain a first voltage +5V, where the voltage +5V is a voltage output by the second power supply end of the power supply 14; and then, the voltage reduction and stabilization processing of the voltage stabilization module 144 are performed to obtain a second voltage +3.3V, where the voltage +3.3V is the voltage output by the third power end of the power supply 14. The +3.3V voltage output by the third power supply end of the power supply 14 is the working voltage of the fan speed control device 1.
In an embodiment, as shown in fig. 4, which is a further improved embodiment based on the above-mentioned embodiment, the amplifying module 131 may include a first voltage dividing resistor R9, a second voltage dividing resistor R10, a transistor Q1, a first pull-up resistor R6, and a first filter capacitor C9; the transistor Q1 has an amplification control terminal, a first amplification terminal and a second amplification terminal; the transistor Q1 may be a transistor, further, the transistor may be an NPN transistor, and of course, other transistors may also be used.
Specifically, the amplification control terminal of the transistor Q1 is connected to the control unit 12 via the first voltage-dividing resistor R9, and is connected to the ground GND of the power supply 14 via the second voltage-dividing resistor R10; the first amplifying terminal of the transistor Q1 is connected to the power supply terminal of the power supply 14 via the first pull-up resistor R6; the second amplification end of the transistor is connected with the ground end GND of the power supply 14; the first amplification end of the transistor Q1 outputs the amplified signal; the power supply terminal of the power supply 14 is connected to the ground terminal GND of the power supply 14 via the first filter capacitor C9.
Specifically, when the transistor is an NPN transistor, the base of the transistor Q1 is connected to the control unit 12 via the first voltage-dividing resistor R9, and is connected to the ground GND of the power supply 14 via the second voltage-dividing resistor R10; the collector of the transistor Q1 is connected to a first power supply terminal of the power supply 14 via the first pull-up resistor R6; the emitter of the transistor is connected with the ground end GND of the power supply 14; the collector of the transistor Q1 outputs the amplified signal; the first power supply terminal of the power supply 14 is connected to the ground terminal GND of the power supply 14 via the first filter capacitor C9. The first power terminal of the power supply 14 outputs + 12V.
In an embodiment, as shown in fig. 4, which is a further improved embodiment based on the above embodiment, the switch module 132 may include a switch tube FET1 and a first diode D3; the switch tube FET1 has a switch control terminal, a first switch terminal and a second switch terminal; the switching transistor FET1 may be a transistor, a MOS transistor, or the like, and further, the switching transistor FET1 may be a PMOS transistor, or may be another switching transistor.
Specifically, a switch control terminal of the switching tube FET1 is connected to the amplifying module 131, and a first switch terminal of the switching tube FET1 outputs the rotation speed control signal and is connected to an anode of the first diode D3; the second switch end of the switch FET1 is connected to the ground end GND of the power supply 14; the cathode of the first diode D3 is connected to the power supply terminal of the power supply 14.
Specifically, when the switching tube FET1 is a PMOS tube, the gate of the switching tube FET1 is connected to the amplifying module 131, that is, the gate of the switching tube FET1 is connected to the collector of the transistor Q1, and the source of the switching tube FET1 outputs the rotation speed control signal and is connected to the anode of the first diode D3; the drain of the switching tube FET1 is connected to the ground GND of the power supply 14; the cathode of the first diode D3 is connected to a first power supply terminal of the power supply 14. Further, the input terminal J2 of the fan 2 has a first fan interface and a second fan interface, the second fan interface of the fan 2 is connected to the first power terminal of the power supply 14, and the first fan interface of the fan 2 is connected to the source of the switch FET1 for receiving the rotation speed control signal. The first power terminal of the power supply 14 outputs + 12V.
This embodiment is through adopting and using the MOS pipe drive fan 2 rotates, makes fan drive unit 13's current output capacity is high, MOS pipe drive level uses the triode drive, can realize fan speed control device 1's 3.3V control fan 2's 12V, and the MOS pipe can switch on and turn-off completely, through being in fan 2 position parallel diode, can be for provide the return circuit of bleeding when the MOS pipe cuts off, the protection fan speed control device 1. The parallel connection of the diode at the position of the fan 2 can also improve the switching speed of the MOS tube, so that the fan rotating speed control device 1 can accurately control the rotating speed of the fan 2. The performance of the fan speed control device 1 provided by the embodiment is more stable, energy can be saved, the loss and noise of the fan 2 which rotates at a high speed for a long time can be reduced, and the service life of the fan 2 is prolonged.
In an embodiment, as shown in fig. 5, which is a further improved embodiment based on the above embodiment, the temperature acquisition unit 11 may include a first resistor R8, a second resistor R7, a second filter capacitor C10, a third filter capacitor C11, and a temperature sensor J3; the temperature sensor J3 can adopt DS18B20, DS18B20 is the digital temperature sensor chip, and what its output is digital signal, has characteristics such as small, the hardware cost is low, the interference killing feature is strong, the high dustproof of precision is waterproof. Of course, the temperature sensor J3 may also be another type of temperature sensor, and the application is not limited in this respect.
Specifically, when the temperature sensor J3 is DS18B20, the first pin of DS18B20 is the power supply terminal of DS18B20, the second pin of DS18B20 is the output terminal of DS18B20, and the third pin of DS18B20 is the power ground of DS18B 20. The output end of the temperature sensor J3 is connected with the control unit 12 through the first resistor R8, and is connected with the third power supply end of the power supply 14 through the second resistor R7; the power supply end of the temperature sensor J3 is connected to a third power supply end of the power supply 14, and is connected to the ground end GND of the power supply 14 via the second filter capacitor C10, and the third filter capacitor C11 is connected in parallel with the second filter capacitor C12; the power ground of the temperature sensor J3 is connected to the ground GND of the power supply 14. The third power end of the power supply 14 outputs + 3.3V.
In an embodiment, as shown in fig. 2, which is a further improved embodiment based on the above embodiment, the control unit 12 may include a single chip 121, a reset module 122, a crystal module 123, and a download debugging interface module 124; further, the reset module 122, the crystal oscillator module 123, and the download debugging interface module 124 are respectively connected to the single chip 121; the forty-first pin of the single chip 121 outputs the rotation speed control signal. Specifically, as shown in fig. 5, the single chip microcomputer 121 may adopt an STM32F103RET6 single chip microcomputer, different series of single chip microcomputers may be selected according to actual requirements, and of course, the single chip microcomputer 121 may also adopt single chip microcomputers of other models, which is not limited herein. Further, a forty-first pin of the single chip microcomputer 121 outputs a PWM signal to the fan driving unit 13.
Specifically, as shown in fig. 7, the reset module 122 may include an eighth resistor R11 and a third capacitor C12. A first end of the eighth resistor R11 is connected to the third power supply end of the power supply 14, the third power supply end of the power supply 14 outputs +3.3V, and a second end of the eighth resistor R11 is connected to the single chip microcomputer 121 and is connected to the ground GND of the power supply 14 through the third capacitor C12. Further, a reset button can be installed in the fan speed control device 1, the reset button can be used for resetting a program of the fan speed control system, the reset button can be reserved for resetting the program of the fan speed control system, the later-stage daily operation is convenient to use, and components selected for use in the embodiment are low in cost and high in cost performance.
Specifically, as shown in fig. 7, the crystal oscillator module 123 may include a crystal oscillator element Y1, a fourth capacitor C13, a fifth capacitor C20, and a ninth resistor R12. The crystal oscillator element Y1 can adopt an external 8MHz quartz crystal oscillator, the output of the external 8MHz quartz crystal oscillator is stable, and the operation of the fan rotating speed control device 1 can be more stable. Further, the first end of the fourth capacitor C13, the first end of the fifth capacitor C20, the second pin of the crystal oscillator element Y1 and the fourth pin of the crystal oscillator element Y1 are all connected to the ground GND of the power supply 14; a second end of the fourth capacitor C13 is connected to the third pin of the crystal oscillator element Y1 and the first end of the ninth resistor R12; a second end of the fifth capacitor C20 is connected to the first pin of the crystal oscillator element Y1 and the second end of the ninth resistor R12; the third pin of the crystal oscillator element Y1 is connected with the single chip microcomputer 121, and the first pin of the crystal oscillator element Y1 is connected with the single chip microcomputer 121.
Specifically, as shown in fig. 7, the download debugging interface module 124 may include a first download debugging interface and a second download debugging interface. The download debugging interface module 124 can be used as a download interface of a reserved program of the fan speed control system, so that the fan speed control device 1 can be conveniently debugged and upgraded in the later period.
Further, the control unit 12 may further include a decoupling module 125, and the decoupling module 125 may include a plurality of decoupling capacitors, and the number of the decoupling capacitors is not limited. The decoupling module 125 can be disposed near the single chip 121, so as to ensure stable power supply of the single chip 121 and reduce power interference. As shown in fig. 7, in particular, the decoupling module 125 may include a first decoupling capacitor C14, a second decoupling capacitor C15, a third decoupling capacitor C16, a fourth decoupling capacitor C17, a fifth decoupling capacitor C18, and a sixth decoupling capacitor C19; a first end of the first decoupling capacitor C14 is connected to a third power supply end of the power supply 14, and the third power supply end of the power supply 14 outputs + 3.3V. A second end of the first decoupling capacitor C14 is connected to the ground GND of the power supply 14; the second decoupling capacitor C15, the third decoupling capacitor C16, the fourth decoupling capacitor C17, the fifth decoupling capacitor C18 and the sixth decoupling capacitor C19 are all connected in parallel with the first decoupling capacitor C14.
In an embodiment, as shown in fig. 8, which is a further modified embodiment on the basis of the above-described embodiment,
the surge protection module 141 may include a fuse P1 and a transient voltage suppression diode D2; a first terminal of the fuse P1 receives an input dc voltage, a second terminal of the fuse P1 is connected to a first terminal of the transient voltage suppression diode D2, and a second terminal of the transient voltage suppression diode D2 is connected to a ground terminal GND of the power supply 14; the filtering module 142 may include: a pi-type filter; the pi-type filter may include a first electrolytic capacitor E1, a first inductor L1, and a second electrolytic capacitor E2.
Specifically, as shown in fig. 8, a first interface of the dc power input terminal J1 is connected to a positive electrode of the dc power, and a second interface of the dc power input terminal J1 is connected to a negative electrode of the dc power. A first terminal of the fuse P1 may be connected to the first interface of the dc power input terminal J1, a second terminal of the fuse P1 may be connected to the first terminal of the transient voltage suppression diode D2, and a second terminal of the transient voltage suppression diode D2 is connected to the ground terminal GND of the power supply 14; the ground GND of the power supply 14 is connected to the second interface of the dc power input J1. Further, a second end of the fuse P1 may be connected to an anode of the first electrolytic capacitor E1 and a first end of the first inductor L1, respectively, a second end of the first inductor L1 is connected to an anode of the second electrolytic capacitor E2, and a cathode of the first electrolytic capacitor E1 and a cathode of the second electrolytic capacitor E2 are connected to a ground GND of the power supply 14, respectively. The second end of the first inductor L1 is used as the first power supply end of the power supply 14, and the first power supply end of the power supply 14 outputs + 12V.
In an embodiment, as shown in fig. 8, which is a further improved embodiment based on the above embodiment, the switching power supply module 143 may include a fourth filter capacitor C5, a fifth filter capacitor C7, a third resistor R1, a fourth resistor R4, a buck switching regulator U1, a first capacitor C1, a second diode D1, a second inductor L1, a fifth resistor R2, a sixth resistor R5, a second capacitor C4, a sixth filter capacitor C8, and a seventh filter capacitor C6; the step-down switching regulator U1 may adopt MP9486A, the MP9486A is a high-voltage step-down switching regulator, and of course, the step-down switching regulator U1 may also adopt other types of step-down switching regulators, which is not limited herein.
Specifically, as shown in fig. 8, a VIN pin of the buck switching regulator U1 is respectively connected to the filtering module 142 and one end of the fourth filtering capacitor C5; the other end of the fourth filter capacitor C5 and a GND pin of the buck switching regulator U1 are both connected to a ground GND of the power supply 14; the fifth filter capacitor C7 is connected in parallel with the fourth filter capacitor C5;
the EN pin of the step-down switching regulator U1 is connected with the DIM pin; the EN pin of the buck switching regulator U1 is connected with the VIN pin of the buck switching regulator U1 through the third resistor R1, and is connected with the GND pin of the buck switching regulator U1 through the fourth resistor R4;
two ends of the first capacitor C1 are respectively connected with a BST pin and an SW pin of the buck switching regulator U1; the SW pin of the buck switching regulator U1 is connected to the cathode of the second diode D1 and the first end of the second inductor L2, respectively; the anode of the second diode D1 is connected to the ground GND of the power supply 14; a second end of the second inductor L2 is connected to the FB pin of the buck switching regulator U1 via the fifth resistor R2, and is connected to the GND pin of the buck switching regulator U1 via the sixth filter capacitor C8; the second capacitor C4 is connected in parallel with the fifth resistor R2; the seventh filter capacitor C6 is connected in parallel with the sixth filter capacitor C8; two ends of the sixth resistor R5 are respectively connected with the FB pin and the GND pin of the buck switching regulator U1. A second end of the second inductor L2 is used as a second power supply end of the power supply 14, and the second power supply end of the power supply 14 outputs + 5V.
In an embodiment, as shown in fig. 8, which is a further improved embodiment based on the above embodiment, the voltage stabilizing module 144 may include a seventh resistor R3, a voltage regulator U2, an eighth filter capacitor C2, and a ninth filter capacitor C3; the voltage regulator U2 can adopt SPX3819M5-3-3, and the SPX3819M5-3-3 is a fixed voltage regulator, and can realize the output of 3.3V and 500 MA. Of course, the voltage regulator U2 may be another voltage regulator, and the application is not limited thereto.
Specifically, as shown in fig. 8, the VI pin of the voltage regulator U2 is connected to the switching power supply module 143, and is connected to the CE pin of the voltage regulator U2 via the seventh resistor R3; the GND pin of the voltage stabilizer U2 is connected with the ground end GND of the power supply 14; the VO pin of the regulator U2 is connected to the ground GND of the power supply 14 through the eighth filter capacitor C2, and the ninth filter capacitor C3 is connected in parallel to the eighth filter capacitor C2. The VO pin of the voltage regulator U2 is used as a third power supply end of the power supply 14, and the third power supply end of the power supply 14 outputs + 3.3V.
In one embodiment, as shown in fig. 9, fig. 9 is a schematic circuit diagram of the fan speed control apparatus 1.
The utility model also provides an electronic equipment, in an embodiment, electronic equipment can include fan and any above-mentioned embodiment fan speed control device 1. The fan speed control device 1 is connected with the fan.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A fan speed control apparatus, comprising:
the temperature acquisition unit is used for acquiring the temperature inside the electronic equipment;
the control unit is connected with the temperature acquisition unit and used for outputting a rotating speed control signal according to the temperature;
the fan driving unit is connected with the control unit and used for driving the fan to rotate according to the rotating speed control signal; and
the power supply is used for supplying power to the fan rotating speed control device;
the fan driving unit includes:
the amplification module is used for receiving the rotating speed control signal and amplifying the rotating speed control signal to obtain an amplified signal;
the switch module is connected with the amplifying module; the fan control circuit is used for changing the self switch state based on the amplified signal to realize the rotation speed adjustment of the fan.
2. The fan speed control apparatus of claim 1 wherein the amplification module comprises: the circuit comprises a first voltage-dividing resistor, a second voltage-dividing resistor, a transistor, a first pull-up resistor and a first filter capacitor;
the transistor is provided with an amplification control end, a first amplification end and a second amplification end;
the amplification control end of the transistor is connected with the control unit through the first voltage-dividing resistor and is connected with the grounding end of the power supply through the second voltage-dividing resistor; a first amplifying terminal of the transistor is connected with a power supply terminal of the power supply source through the first pull-up resistor; the second amplification end of the transistor is connected with the grounding end of the power supply; the first amplifying end of the transistor outputs the amplified signal; and the power supply end of the power supply is connected with the grounding end of the power supply through the first filter capacitor.
3. The fan speed control apparatus of claim 1 wherein the switch module comprises: a switching tube and a first diode;
the switch tube is provided with a switch control end, a first switch end and a second switch end;
the switch control end of the switch tube is connected with the amplification module, and the first switch end of the switch tube outputs the rotating speed control signal and is connected with the anode of the first diode; the second switch end of the switch tube is connected with the grounding end of the power supply; and the cathode of the first diode is connected with a power supply end of the power supply.
4. The fan speed control apparatus according to claim 1, wherein the temperature collecting unit includes: the temperature sensor comprises a first resistor, a second filter capacitor, a third filter capacitor and a temperature sensor;
the output end of the temperature sensor is connected with the control unit through the first resistor and is connected with the power supply end of the power supply through the second resistor; the power supply end of the temperature sensor is connected with the power supply end of the power supply and is connected with the grounding end of the power supply through the second filter capacitor, and the third filter capacitor is connected with the second filter capacitor in parallel; and the power ground of the temperature sensor is connected with the grounding end of the power supply.
5. The fan speed control device of claim 1, wherein the control unit comprises a single chip microcomputer, a reset module, a crystal oscillator module and a download debugging interface module;
the reset module, the crystal oscillator module and the download debugging interface module are respectively connected with the singlechip;
and a fortieth pin of the singlechip outputs the rotating speed control signal.
6. The fan speed control apparatus according to claim 1, wherein the power supply source comprises:
the surge protection module is used for carrying out surge protection on the input direct-current voltage and supplying the input direct-current voltage to the filtering module;
the filtering module is used for filtering the voltage output by the surge protection module and supplying the voltage to the switching power supply module;
the switching power supply module is used for carrying out voltage reduction processing on the voltage output by the filtering module and obtaining a first voltage to be supplied to the voltage stabilizing module; and
and the voltage stabilizing module is used for carrying out voltage reduction and voltage stabilization treatment on the first voltage and obtaining a second voltage to supply to the fan rotating speed control device.
7. The fan speed control apparatus according to claim 6,
the surge protection module includes: a fuse and a transient voltage suppression diode;
the first end of the fuse receives an input direct-current voltage, the second end of the fuse is connected with the first end of the transient voltage suppression diode, and the second end of the transient voltage suppression diode is connected with the grounding end of the power supply;
the filtering module includes: a pi-type filter;
the pi-type filter comprises a first electrolytic capacitor, a first inductor and a second electrolytic capacitor.
8. The fan speed control apparatus according to claim 6,
the switching power supply module includes: the voltage-reducing switch voltage stabilizer comprises a fourth filter capacitor, a fifth filter capacitor, a third resistor, a fourth resistor, a voltage-reducing switch voltage stabilizer, a first capacitor, a second diode, a second inductor, a fifth resistor, a sixth resistor, a second capacitor, a sixth filter capacitor and a seventh filter capacitor;
a VIN pin of the step-down switching regulator is respectively connected with the filtering module and one end of the fourth filtering capacitor; the other end of the fourth filter capacitor and a GND pin of the step-down switching regulator are both connected with a ground terminal of the power supply; the fifth filter capacitor is connected with the fourth filter capacitor in parallel;
the EN pin of the step-down switching regulator is connected with the DIM pin; an EN pin of the step-down switching regulator is connected with a VIN pin of the step-down switching regulator through the third resistor and is connected with a GND pin of the step-down switching regulator through the fourth resistor;
two ends of the first capacitor are respectively connected with a BST pin and an SW pin of the buck switching regulator; the SW pin of the step-down switching regulator is respectively connected with the cathode of the second diode and the first end of the second inductor; the anode of the second diode is connected with the grounding end of the power supply; the second end of the second inductor is connected with the FB pin of the buck switching regulator through the fifth resistor and is connected with the GND pin of the buck switching regulator through the sixth filter capacitor; the second capacitor is connected with the fifth resistor in parallel; the seventh filter capacitor is connected with the sixth filter capacitor in parallel; and two ends of the sixth resistor are respectively connected with the FB pin and the GND pin of the step-down switching regulator.
9. The fan speed control apparatus according to claim 6,
the voltage stabilization module includes: the seventh resistor, the voltage stabilizer, the eighth filter capacitor and the ninth filter capacitor;
a VI pin of the voltage stabilizer is connected with the switching power supply module and is connected with a CE pin of the voltage stabilizer through the seventh resistor; the GND pin of the voltage stabilizer is connected with the ground terminal of the power supply; and the VO pin of the voltage stabilizer is connected with the grounding end of the power supply through the eighth filter capacitor, and the ninth filter capacitor is connected with the eighth filter capacitor in parallel.
10. An electronic device, characterized in that the electronic device comprises: a fan and a fan speed control apparatus as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022038643.9U CN213953958U (en) | 2020-09-16 | 2020-09-16 | Fan rotation speed control device and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022038643.9U CN213953958U (en) | 2020-09-16 | 2020-09-16 | Fan rotation speed control device and electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| CN213953958U true CN213953958U (en) | 2021-08-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022038643.9U Active CN213953958U (en) | 2020-09-16 | 2020-09-16 | Fan rotation speed control device and electronic equipment |
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| Country | Link |
|---|---|
| CN (1) | CN213953958U (en) |
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