CN219220793U - Control speed regulation circuit of direct current fan - Google Patents

Control speed regulation circuit of direct current fan Download PDF

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Publication number
CN219220793U
CN219220793U CN202223306168.4U CN202223306168U CN219220793U CN 219220793 U CN219220793 U CN 219220793U CN 202223306168 U CN202223306168 U CN 202223306168U CN 219220793 U CN219220793 U CN 219220793U
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triode
pin
direct current
switch
singlechip
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刘云辉
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Heyuan Yongjia Industry Co ltd
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Heyuan Yongjia Industry Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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Abstract

The utility model discloses a control speed regulation circuit of a direct current fan, which comprises a single chip microcomputer minimum system, a direct current fan module, a power supply module, a Hall sensor, a display module and a key regulation module, wherein the single chip microcomputer minimum system comprises a single chip microcomputer, a crystal oscillator circuit and a reset circuit, the direct current fan module is connected with a P3.4 pin and a P3.7 pin of the single chip microcomputer, and the key regulation module is electrically connected with the single chip microcomputer to manually regulate forward and reverse rotation direction and rotation speed parameters of the direct current fan module. The utility model adopts the singlechip to control and output data, the singlechip generates PWM signals and transmits the PWM signals to the DC fan module, the Hall sensor can convert the rotating speed of the DC fan into pulse signals which can be identified by the singlechip, and the rotating speed display is carried out in the display module; the button adjusting module can realize manual speed regulation and steering adjustment of the direct current fan module through the singlechip, so that the speed and steering of the direct current fan are controlled.

Description

Control speed regulation circuit of direct current fan
Technical Field
The utility model relates to the field of fans, in particular to a control speed regulating circuit of a direct current fan.
Background
The speed-regulating DC fan controlled by PWM is based on the control of SCM to output different frequencies and duty ratios, so as to realize the speed-regulating function of DC fan. The energy-saving fan has the advantages of saving energy, reducing fan rotation noise, adjusting air quantity and the like by adjusting the rotation speed of the fan so as to meet the demands of different industries. The device can be applied to fan monitoring systems, thermal resistance and heat dissipation systems, computers and other devices.
In the prior art, a direct current fan speed regulating module controlled by PWM mainly comprises a power supply circuit, a singlechip main circuit, a PWM control circuit and a drive circuit, and the PWM amplitude of the traditional direct current fan is not adjustable and cannot meet the problem that a user needs to regulate the speed to a specified rotating speed.
Accordingly, the prior art has drawbacks and needs improvement.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: the control speed regulating circuit of the direct current fan can be regulated to a specified rotating speed and can realize reversing.
The technical scheme of the utility model is as follows: a control speed regulation circuit of a direct current fan comprises a single chip microcomputer minimum system, a direct current fan module, a power supply module, a Hall sensor, a display module and a key regulation module;
the singlechip minimum system comprises a singlechip, a crystal oscillator circuit and a reset circuit, wherein the crystal oscillator circuit and the reset circuit are respectively and electrically connected with the singlechip;
the direct current fan module is connected with a P3.4 pin and a P3.7 pin of the singlechip;
the power module is connected with a VCC pin of the singlechip;
the first end of the Hall sensor is connected with a VCC pin of the singlechip, the second end of the Hall sensor is grounded, and the third end of the Hall sensor is connected with a P3.3 pin of the singlechip so as to convert the rotating speed of the direct-current fan module into a pulse signal which can be identified by the singlechip;
the display module is electrically connected with the singlechip to real-time rotate speed value of the direct current fan module;
the key adjusting module is electrically connected with the single chip microcomputer to manually adjust the forward and reverse steering and rotating speed parameters of the direct current fan module.
By adopting the technical scheme, in the control speed regulating circuit of the direct current fan, the direct current fan module comprises a direct current fan, a first triode, a second triode, a third triode, a fourth triode, a fifth triode, a sixth triode, a first diode, a second diode, a third diode and a fourth diode, a P3.4 pin of the single chip microcomputer is connected with a base electrode of the first triode, a P3.7 pin of the single chip microcomputer is connected with a base electrode of the second triode, an emitter butt of the first triode and the second triode, a collector of the first triode is connected with a VCC pin of the single chip microcomputer, a base electrode of the third triode and a base electrode of the fourth triode respectively, a collector of the second triode is connected with a VCC pin of the single chip microcomputer, a base electrode of the fifth triode and a base electrode of the sixth triode respectively, a pin of the single chip microcomputer is connected with a cathode of the third diode, a cathode of the second diode and a base electrode of the sixth triode respectively, an emitter of the fourth triode is connected with an anode of the positive electrode of the single chip microcomputer, a cathode of the fourth triode and a cathode of the fourth triode respectively, an emitter of the fourth triode is connected with an anode of the fourth triode respectively, and a cathode of the fourth triode respectively, and an emitter of the fourth triode respectively.
By adopting the technical schemes, in the control speed regulating circuit of the direct current fan, the first triode, the second triode, the third triode and the sixth triode are PNP triodes, and the fourth triode and the fifth triode are NPN triodes.
By adopting the technical schemes, in the control speed regulation circuit of the direct current fan, the power supply module comprises a power socket and a self-locking switch, the VCC pin of the singlechip is connected with the fifth pin of the power socket, the third pin of the power socket is connected with the first pin of the self-locking switch, and the second pin of the self-locking switch is connected with the third pin in parallel and then grounded.
By adopting the above technical schemes, in the control speed regulation circuit of the direct current fan, the key regulation module comprises a first switch, a second switch, a third switch, a fourth switch and a fifth switch, pins P1.0 to P1.4 of the singlechip are respectively connected with first pins of the first switch to the fifth switch, third pins of the first switch are grounded, fourth pins of the first switch are connected with third pins of the second switch, fourth pins of the second switch are connected with third pins of the third switch, fourth pins of the third switch are connected with third pins of the fourth switch, and fourth pins of the fourth switch are connected with third pins of the fifth switch.
By adopting the above technical schemes, in the control speed regulating circuit of the direct current fan, the display module comprises a liquid crystal display screen, a first resistor and a second resistor, the VCC pin of the single chip microcomputer is connected with the first end of the first resistor, the second end of the first resistor is respectively connected with the first end of the second resistor and the third pin of the liquid crystal display screen, the second end of the second resistor is grounded, the first pin and the sixteenth pin of the liquid crystal display screen are grounded, the second pin and the fifteenth pin of the liquid crystal display screen are respectively connected with the VCC pin of the single chip microcomputer, the fourth pin to the sixth pin of the liquid crystal display screen are suspended, and the seventh pin to the fourteenth pin of the liquid crystal display screen are respectively connected with the P0.0 to P0.7 pins of the single chip microcomputer.
By adopting the above technical schemes, in the control speed regulating circuit of the direct current fan, the reset circuit comprises a sixth switch, a third resistor and a first electrolytic capacitor, the VCC pin of the singlechip is respectively connected with the first pin of the sixth switch and the positive electrode of the first electrolytic capacitor, the negative electrode of the first electrolytic capacitor is respectively connected with the fourth pin of the sixth switch and the first end of the third resistor, and the second end of the third resistor is grounded.
By adopting the above technical schemes, in the control speed regulation circuit of the direct current fan, the crystal oscillator circuit comprises a crystal oscillator, a first capacitor and a second capacitor, the XTAL1 pin of the single chip microcomputer is respectively connected with the first end of the crystal oscillator and the first end of the first capacitor, the XTAL2 pin of the single chip microcomputer is respectively connected with the second end of the crystal oscillator and the first end of the second capacitor, and the second end of the second capacitor is grounded after being connected with the second end of the first capacitor.
By adopting the technical schemes, in the control speed regulating circuit of the direct current fan, the model of the singlechip is STC89C51.
By adopting the above technical schemes, in the control speed regulating circuit of the direct current fan, the model of the liquid crystal display screen is LCD1602.
Compared with the prior art, the utility model adopts the singlechip to control output data, the singlechip generates PWM signals and transmits the PWM signals to the DC fan module, the Hall sensor can convert the rotating speed of the DC fan into pulse signals which can be identified by the singlechip, and the rotating speed display is carried out in the display module; the button adjusting module can realize manual speed regulation and steering adjustment of the direct current fan module through the singlechip, so that the speed and steering control of the direct current fan is realized, and the direct current fan is practical and convenient.
Drawings
Fig. 1 is a schematic diagram of a circuit connection relationship according to the present utility model.
Detailed Description
The utility model will be described in detail below with reference to the drawings and the specific embodiments.
In the description of the present utility model, it should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in FIG. 1, a control and speed regulation circuit of a DC fan comprises a singlechip microcomputer minimum system, a DC fan module 1, a power supply module 2, a Hall sensor U3, a display module 4 and a key regulation module 5.
The singlechip minimum system comprises a singlechip U1, a crystal oscillator Y1 circuit 61 and a reset circuit 62, wherein the crystal oscillator Y1 circuit 61 and the reset circuit 62 are respectively and electrically connected with the singlechip U1;
the direct current fan module 1 is connected with the P3.4 pin and the P3.7 pin of the single chip microcomputer U1, the direct current fan module 1 is connected with the single chip microcomputer U1, and the rotating speed and the steering of the direct current fan module 1 are controlled by the single chip microcomputer U1.
The power module 2 is connected with a VCC pin of the singlechip U1, and the power module 2 can provide power drive for the speed regulating circuit.
The first end of the Hall sensor U3 is connected with a VCC pin of the singlechip U1, the second end of the Hall sensor U3 is grounded, and the third end of the Hall sensor U3 is connected with a P3.3 pin of the singlechip U1 so as to convert the rotating speed of the direct-current fan module 1 into a pulse signal which can be identified by the singlechip U1;
the display module 4 is electrically connected with the singlechip U1 to real-time rotate speed value of the direct current fan module 1;
the key adjusting module 5 is electrically connected with the singlechip U1 to manually adjust the forward and reverse steering and rotating speed parameters of the direct current fan module 1.
Further, direct current fan module 1 includes direct current fan M1, first triode Q1, second triode Q2, third triode Q3, fourth triode Q4, fifth triode Q5, sixth triode Q6, first diode D1, second diode D2, third diode D3 and fourth diode D4, the P3.4 pin of singlechip U1 is connected with the base of first triode Q1, the P3.7 pin of singlechip U1 is connected with the base of second triode Q2, the projecting pole butt of first triode Q1 and second triode Q2, the collecting electrode of first triode Q1 is connected with VCC pin, the base of third triode Q3, the base of fourth triode Q4 respectively, the collecting electrode of second triode Q2 is connected with VCC pin, the base of fifth triode Q5 respectively, the base of sixth triode Q6, the positive and negative pole D of third triode Q1, the negative pole of fourth triode Q4 is connected with the positive and negative pole D3 of third triode Q1, the negative pole of fourth triode Q4 respectively, the positive and negative pole D4 of fourth triode Q1, the positive and negative pole D4 of fourth triode Q4 are connected with the positive and negative pole D4 of third triode Q1 respectively, the fourth triode Q4.
Further, the first triode Q1, the second triode Q2, the third triode Q3 and the sixth triode Q6 are PNP type triodes, and the fourth triode Q4 and the fifth triode Q5 are NPN type triodes.
The direct current fan module 1 is composed of a plurality of triodes, and the high and low level of the two input ends controls whether the triodes are conducted or cut off. The NPN type triode is conducted during high-level input, the PNP type triode is conducted during low-level input, when the first triode Q1 and the second triode Q2 are both conducted, the third triode Q3 and the sixth triode Q6 are turned off, at the moment, the fourth triode Q4 and the fifth triode Q5 are conducted, both ends of the direct current fan M1 are GND, the direct current fan M1 is non-rotating, when the first triode Q1 and the second triode Q2 are both turned off, the third triode Q3 and the sixth triode Q6 are conducted, at the moment, the fourth triode Q4 and the fifth triode Q5 are turned off, both ends of the direct current fan M1 are VCC, and the direct current fan M1 is non-rotating.
When the first triode Q1 is conducted, the second triode Q2 is turned off, the fourth triode Q4 and the sixth triode Q6 are conducted, the right side of the direct current fan M1 is connected with a power supply, the left side is grounded, the direct current fan M1 rotates anticlockwise, the second triode Q2 is kept to be turned off at the moment, PWM controls the conduction and the cut-off of the first triode Q1, the speed of the direct current fan M1 can be controlled, similarly, when the first triode Q1 is turned off, the second triode Q2 is conducted, the third triode Q3 and the fifth triode Q5 are conducted, the left side of the direct current fan M1 is the power supply, the right side is the ground, the motor rotates clockwise, the first triode Q1 is kept to be turned off at the moment, and PWM controls the conduction and the cut-off of the second triode Q2, so that the rotating speed of the direct current fan M1 can be controlled. The four diodes have the functions of preventing the triode from generating reverse voltage and realizing overcurrent protection on the two ends of the direct current fan M1 and the triode.
Further, the power module 2 includes a power socket S1 and a self-locking switch P1, a VCC pin of the single-chip microcomputer U1 is connected with a fifth pin of the power socket S1, a third pin of the power socket S1 is connected with a first pin of the self-locking switch P1, and a second pin of the self-locking switch P1 is connected with the third pin in parallel and then grounded. The power socket S1 can be connected with external commercial power through a power line to supply power to the dc fan M1.
Further, the key adjusting module 5 includes a first switch K1, a second switch K2, a third switch K3, a fourth switch K4 and a fifth switch K5, pins P1.0 to P1.4 of the single-chip microcomputer U1 are respectively connected with first pins of the first switch K1 to the fifth switch K5, a third pin of the first switch K1 is grounded, a fourth pin of the first switch K1 is connected with a third pin of the second switch K2, a fourth pin of the second switch K2 is connected with a third pin of the third switch K3, a fourth pin of the third switch K3 is connected with a third pin of the fourth switch K4, and a fourth pin of the fourth switch K4 is connected with a third pin of the fifth switch K5. In this embodiment, the first switch K1 is a forward rotation adjusting button, the second switch K2 is a reverse rotation adjusting button, the third switch K3 is an increasing speed adjusting button, the fourth switch K4 is a decreasing speed adjusting button, the fifth switch K5 is a stopping button, the key adjusting module 5 adopts a low switch connection mode to read signal adjustment, the signal of the singlechip U1 at the beginning is high level, when the switch is pressed down, the singlechip U1 is low level, and then the singlechip U1 processes the signal to realize the rotation speed or steering adjustment of the direct current fan M1.
Further, the display module 4 includes a liquid crystal display U2, a first resistor R1 and a second resistor R2, a VCC pin of the single chip U1 is connected to a first end of the first resistor R1, a second end of the first resistor R1 is connected to a first end of the second resistor R2 and a third pin of the liquid crystal display U2, a second end of the second resistor R2 is grounded, a first pin and a sixteenth pin of the liquid crystal display U2 are grounded, a second pin and a fifteenth pin of the liquid crystal display U2 are connected to a VCC pin of the single chip U1, a fourth pin to a sixth pin of the liquid crystal display U2 are suspended, and a seventh pin to a fourteenth pin of the liquid crystal display U2 are connected to P0.0 to P0.7 pins of the single chip U1. The display module 4 is electrically connected with the singlechip U1, and can display the rotating speed and the steering parameter of the direct-current fan M1 on the liquid crystal display screen U2 in real time, so that a user can intuitively know the running state of the direct-current fan M1.
Further, the reset circuit 62 includes a sixth switch K6, a third resistor R3, and a first electrolytic capacitor EC, where a VCC pin of the single-chip microcomputer U1 is connected to a first pin of the sixth switch K6 and a positive electrode of the first electrolytic capacitor EC, a negative electrode of the first electrolytic capacitor EC is connected to a fourth pin of the sixth switch K6 and a first end of the third resistor R3, and a second end of the third resistor R3 is grounded. In this embodiment, the sixth switch K6 is a reset switch, when the minimum system of the single-chip microcomputer is in operation and is subject to environmental interference and the program runs, the program can be automatically executed from the beginning by pressing the sixth switch K6, so that the system reset is completed.
Further, the crystal oscillator Y1 circuit 61 includes a crystal oscillator Y1, a first capacitor C1 and a second capacitor C2, an XTAL1 pin of the single-chip microcomputer U1 is connected with a first end of the crystal oscillator Y1 and a first end of the first capacitor C1, an XTAL2 pin of the single-chip microcomputer U1 is connected with a second end of the crystal oscillator Y1 and a first end of the second capacitor C2, and a second end of the second capacitor C2 is connected with a second end of the first capacitor C1 and then grounded.
Further, the model of the singlechip U1 is STC89C51.
Further, the model of the liquid crystal display U2 is LCD1602.
Compared with the prior art, the utility model adopts the singlechip to control output data, the singlechip generates PWM signals and transmits the PWM signals to the DC fan module, the Hall sensor can convert the rotating speed of the DC fan into pulse signals which can be identified by the singlechip, and the rotating speed display is carried out in the display module; the button adjusting module can realize manual speed regulation and steering adjustment of the direct current fan module through the singlechip, so that the speed and steering control of the direct current fan is realized, and the direct current fan is practical and convenient.
The foregoing description of the preferred embodiment of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. A control speed regulation circuit of a direct current fan is characterized in that: the system comprises a singlechip minimum system, a direct current fan module, a power module, a Hall sensor, a display module and a key adjusting module;
the singlechip minimum system comprises a singlechip, a crystal oscillator circuit and a reset circuit, wherein the crystal oscillator circuit and the reset circuit are respectively and electrically connected with the singlechip;
the direct current fan module is connected with a P3.4 pin and a P3.7 pin of the singlechip;
the power module is connected with a VCC pin of the singlechip;
the first end of the Hall sensor is connected with a VCC pin of the singlechip, the second end of the Hall sensor is grounded, and the third end of the Hall sensor is connected with a P3.3 pin of the singlechip so as to convert the rotating speed of the direct-current fan module into a pulse signal which can be identified by the singlechip;
the display module is electrically connected with the singlechip to real-time rotate speed value of the direct current fan module;
the key adjusting module is electrically connected with the single chip microcomputer to manually adjust the forward and reverse steering and rotating speed parameters of the direct current fan module.
2. The control and governor circuit of a direct current fan of claim 1, wherein: the DC fan module comprises a DC fan, a first triode, a second triode, a third triode, a fourth triode, a fifth triode, a sixth triode, a first diode, a second diode, a third diode and a fourth diode, wherein a P3.4 pin of the singlechip is connected with a base electrode of the first triode, a P3.7 pin of the singlechip is connected with a base electrode of the second triode, emitting electrodes of the first triode and the second triode are in butt joint, a collector electrode of the first triode is respectively connected with a VCC pin of the singlechip, a base electrode of the third triode and a base electrode of the fourth triode, a collector electrode of the second triode is respectively connected with a VCC pin of the singlechip, a base electrode of the fifth triode and a base electrode of the sixth triode, the VCC pin of singlechip is connected with the collecting electrode of third triode, the negative pole of first diode, the negative pole of second diode and the collecting electrode of sixth triode respectively, the collecting electrode of fourth triode is connected with the positive pole of third diode, the positive pole of fourth diode and the collecting electrode of fifth triode respectively and then grounded, the positive pole end of direct current fan is connected with the positive pole of first diode, the negative pole of third diode, the projecting pole of third triode, the projecting pole of fourth triode respectively, the negative pole end of direct current fan is connected with the positive pole of second diode, the negative pole of fourth diode, the projecting pole of fifth triode and the projecting pole of sixth triode respectively.
3. The control and governor circuit of a direct current fan of claim 2, wherein: the first triode, the second triode, the third triode and the sixth triode are PNP triodes, and the fourth triode and the fifth triode are NPN triodes.
4. The control and governor circuit of a direct current fan of claim 1, wherein: the power module comprises a power socket and a self-locking switch, wherein a VCC pin of the singlechip is connected with a fifth pin of the power socket, a third pin of the power socket is connected with a first pin of the self-locking switch, and a second pin of the self-locking switch is connected with the third pin in parallel and then grounded.
5. The control and governor circuit of a direct current fan of claim 1, wherein: the key adjusting module comprises a first switch, a second switch, a third switch, a fourth switch and a fifth switch, pins P1.0 to P1.4 of the single chip microcomputer are respectively connected with first pins of the first switch to the fifth switch, third pins of the first switch are grounded, fourth pins of the first switch are connected with third pins of the second switch, fourth pins of the second switch are connected with third pins of the third switch, fourth pins of the third switch are connected with third pins of the fourth switch, and fourth pins of the fourth switch are connected with third pins of the fifth switch.
6. The control and governor circuit of a direct current fan of claim 2, wherein: the display module comprises a liquid crystal display screen, a first resistor and a second resistor, wherein the VCC pin of the single chip microcomputer is connected with the first end of the first resistor, the second end of the first resistor is connected with the first end of the second resistor and the third pin of the liquid crystal display screen respectively, the second end of the second resistor is grounded, the first pin and the sixteenth pin of the liquid crystal display screen are grounded, the second pin and the fifteenth pin of the liquid crystal display screen are connected with the VCC pin of the single chip microcomputer respectively, the fourth pin to the sixth pin of the liquid crystal display screen are suspended, and the seventh pin to the fourteenth pin of the liquid crystal display screen are connected with the P0.0 to P0.7 pins of the single chip microcomputer respectively.
7. The control and governor circuit of a direct current fan of claim 1, wherein: the reset circuit comprises a sixth switch, a third resistor and a first electrolytic capacitor, wherein the VCC pin of the singlechip is respectively connected with the first pin of the sixth switch and the positive electrode of the first electrolytic capacitor, the negative electrode of the first electrolytic capacitor is respectively connected with the fourth pin of the sixth switch and the first end of the third resistor, and the second end of the third resistor is grounded.
8. The control and governor circuit of a direct current fan of claim 1, wherein: the crystal oscillator circuit comprises a crystal oscillator, a first capacitor and a second capacitor, wherein the XTAL1 pin of the single chip microcomputer is respectively connected with the first end of the crystal oscillator and the first end of the first capacitor, the XTAL2 pin of the single chip microcomputer is respectively connected with the second end of the crystal oscillator and the first end of the second capacitor, and the second end of the second capacitor is grounded after being connected with the second end of the first capacitor.
9. The control and governor circuit of a direct current fan according to any one of claims 1 to 8, wherein: the model of the singlechip is STC89C51.
10. The control and governor circuit of a direct current fan of claim 6, wherein: the model of the liquid crystal display screen is LCD1602.
CN202223306168.4U 2022-12-09 2022-12-09 Control speed regulation circuit of direct current fan Active CN219220793U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202223306168.4U CN219220793U (en) 2022-12-09 2022-12-09 Control speed regulation circuit of direct current fan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202223306168.4U CN219220793U (en) 2022-12-09 2022-12-09 Control speed regulation circuit of direct current fan

Publications (1)

Publication Number Publication Date
CN219220793U true CN219220793U (en) 2023-06-20

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Application Number Title Priority Date Filing Date
CN202223306168.4U Active CN219220793U (en) 2022-12-09 2022-12-09 Control speed regulation circuit of direct current fan

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