Fan control device

Abstract

The utility model belongs to the technical field of fans, and relates to a fan control device which comprises a single chip microcomputer, a voltage power supply circuit, a signal isolation circuit, an interface circuit, a relay control amplifying circuit, a motor driving circuit, a serial port receiving and transmitting circuit, a fan overvoltage and overcurrent alarm circuit and a voltage fan. The voltage power supply circuit is used for supplying power to the fan control device, and the signal isolation circuit is used for isolating signals among the voltage power supply circuit, the voltage signal isolation circuit, the voltage interface circuit, the voltage relay control amplification circuit, the voltage motor drive circuit, the voltage serial port transceiver circuit and the voltage fan overvoltage and overcurrent alarm circuit to prevent electrical interference. The interface circuit is used for connecting the fan control device with external equipment, and the relay control amplifying circuit is used for amplifying control signals so as to drive a relay to conduct on-off operation and control starting, stopping and rotating speed of a fan. The fan can be efficiently, safely and intelligently controlled, and stable and reliable wind power support is provided for various application scenes.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, and more specifically to a fan control device. Background Art

[0002] With the development and progress of technology, many fans on the market have begun to have protective circuits and casings. According to different user needs, a variety of products that meet user needs have emerged. However, different products still cannot meet people's higher needs. Products are constantly improving in such an environment, and people are constantly creating new products for this purpose.

[0003] In the prior art, the control panel circuit is not comprehensive and perfect enough. Utility Model Content

[0004] In view of the above-mentioned defects of the prior art, the utility model provides a fan control device, including: a single-chip microcomputer, a voltage power supply circuit, a signal isolation circuit, an interface circuit, a relay control amplifier circuit, a motor drive circuit, a serial port transceiver circuit, a fan overvoltage and overcurrent alarm circuit and a voltage fan, all of which are connected to the single-chip microcomputer. The voltage power supply circuit is used to power the fan control device, and the signal isolation circuit is used to isolate the signals between the voltage power supply circuit, the voltage signal isolation circuit, the voltage interface circuit, the voltage relay control amplifier circuit, the voltage motor drive circuit, the voltage serial port transceiver circuit and the voltage fan overvoltage and overcurrent alarm circuit, so as to prevent The interface circuit is used for the fan control device to connect external equipment, the relay control amplifier circuit is used to amplify the control signal, thereby driving the relay to perform switching operations, and controlling the start and stop and speed of the fan. The motor drive circuit is used to adjust the running state of the motor according to the control signal to achieve control of the fan. The serial port transceiver circuit is used to receive and send data through the serial port, so that the device communicates with the host computer to achieve real-time data transmission and remote control. The fan overvoltage and overcurrent alarm circuit is used to trigger an alarm once the fan is detected to have an overvoltage or overcurrent abnormality, reminding the user to handle it in time to prevent the fault from expanding. Preferably, the single-chip microcomputer is N32G030C8L7.

[0005] Preferably, the voltage power supply circuit includes a mains-to-DC 24V power supply circuit, a 24V-to-3.3V power supply circuit, and a 24V energy storage power supply circuit.

[0006] Preferably, the signal isolation circuit includes a light-emitting diode anode of a dual-channel high-speed optoelectronic isolator U4 connected to one end of a resistor R20, a light-emitting diode anode of a dual-channel high-speed optoelectronic isolator U5 connected to one end of a resistor R21, a light-emitting diode anode of a dual-channel high-speed optoelectronic isolator U6 connected to one end of a resistor R23, and a light-emitting diode anode of a dual-channel high-speed optoelectronic isolator U7 connected to a resistor R25.

[0007] Preferably, the interface circuit includes a 5569-16P terminal.

[0008] Preferably, the relay control amplifier circuit includes: one end of the relay K1A is connected to the collector of the transistor Q3, the emitter of the transistor Q3 is connected to one end of the resistor R15 and grounded, and the base of the transistor Q3 is respectively connected to the other end of the resistor R15 and one end of the resistor R18.

[0009] Preferably, the motor driving circuit includes a dual-channel H-bridge motor driving chip U1.

[0010] Preferably, the serial port transceiver circuit includes an RS485 communication transceiver chip U9.

[0011] Preferably, the fan overvoltage and overcurrent alarm circuit includes: one end of the relay K2A is connected to the collector of the transistor Q2, the emitter of the transistor Q2 is connected to one end of the resistor R13 and is grounded, and the base of the transistor Q2 is respectively connected to one end of the resistor R14 and the other end of the resistor R13.

[0012] Preferably, the device is further provided with a damper, and the damper is arranged at the periphery of the fan.

[0013] The implementation of the fan control device of the utility model has the following beneficial effects: by setting a single-chip microcomputer, a voltage power supply circuit, a signal isolation circuit, an interface circuit, a relay control amplifier circuit, a motor drive circuit, a serial port transceiver circuit, and a fan overvoltage and overcurrent alarm circuit are all connected to the single-chip microcomputer. The voltage power supply circuit is used to power the fan control device, the signal isolation circuit is used to isolate the signals between the voltage power supply circuit, the voltage signal isolation circuit, the voltage interface circuit, the voltage relay control amplifier circuit, the voltage motor drive circuit, the voltage serial port transceiver circuit, and the voltage fan overvoltage and overcurrent alarm circuit to prevent electrical interference, and the interface circuit is used for the fan control device to connect to external devices The relay control amplifier circuit is used to amplify the control signal to drive the relay to perform switching operations to control the start and stop and speed of the fan. The motor drive circuit is used to adjust the operating state of the motor according to the control signal to control the fan. The serial port transceiver circuit is used to send and receive data through the serial port, so that the device can communicate with the host computer to achieve real-time data transmission and remote control. The fan overvoltage and overcurrent alarm circuit is used to trigger an alarm once an overvoltage or overcurrent abnormality is detected in the fan, reminding the user to deal with it in time to prevent the fault from expanding. The fan can be controlled efficiently, safely and intelligently to provide stable and reliable wind support for various application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. The utility model will be further described below in combination with the drawings and embodiments. In the drawings:

[0015] Figure 1 It is a schematic diagram of the circuit structure of the fan control device of the utility model;

[0016] Figure 2 This is a voltage power supply circuit diagram of the fan control device of the utility model;

[0017] Figure 3 This is a signal isolation circuit diagram in the fan control device of the utility model;

[0018] Figure 4 This is the interface circuit diagram of the fan control device of the utility model;

[0019] Figure 5 This is a relay control amplifying circuit diagram in the fan control device of the utility model;

[0020] Figure 6This is the motor drive circuit diagram of the fan control device of the utility model;

[0021] Figure 7 This is a serial port transceiver circuit diagram in the fan control device of the utility model;

[0022] Figure 8 This is the fan over-voltage and over-current alarm circuit diagram in the utility model fan control device;

[0023] Fig. 9 It is a schematic diagram of a single chip microcomputer in the fan control device of the utility model. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0027] Figure 1 It is a schematic diagram of the circuit structure of the fan control device of the utility model; Figure 2 This is a voltage power supply circuit diagram of the fan control device of the utility model; Figure 3 This is a signal isolation circuit diagram in the fan control device of the utility model; Figure 4 This is the interface circuit diagram of the fan control device of the utility model; Figure 5 This is a relay control amplifying circuit diagram in the fan control device of the utility model; Figure 6This is the motor drive circuit diagram of the fan control device of the utility model; Figure 7 This is a serial port transceiver circuit diagram in the fan control device of the utility model; Figure 8 This is the fan over-voltage and over-current alarm circuit diagram in the utility model fan control device; Fig. 9 This is a schematic diagram of the single chip microcomputer in the fan control device of the utility model. Figure 1-Figure 9 In the fan control device provided in the first embodiment of the utility model, at least a single chip microcomputer is included, a voltage power supply circuit, a signal isolation circuit, an interface circuit, a relay control amplifier circuit, a motor drive circuit, a serial port transceiver circuit, and a fan overvoltage and overcurrent alarm circuit are connected to the single chip microcomputer. The voltage power supply circuit is used to power the fan control device. The signal isolation circuit is used to isolate the signals between the voltage power supply circuit, the voltage signal isolation circuit, the voltage interface circuit, the voltage relay control amplifier circuit, the voltage motor drive circuit, the voltage serial port transceiver circuit and the voltage fan overvoltage and overcurrent alarm circuit to prevent electrical interference. The interface circuit is used for the fan control device to connect external equipment. The relay control amplifier circuit is used to amplify the control signal, thereby driving the relay to perform switching operations to control the start and stop and speed of the fan. The motor drive circuit is used to adjust the running state of the motor according to the control signal to realize the control of the fan. The serial port transceiver circuit is used to transmit and receive data through the serial port, so that the device communicates with the host computer to realize real-time data transmission and remote control. The fan overvoltage and overcurrent alarm circuit is used to trigger an alarm once an abnormal overvoltage or overcurrent condition of the fan is detected, reminding the user to handle it in time to prevent the fault from expanding. In specific implementation, the single chip microcomputer can be, but is not limited to, N32G030C8L7. In this embodiment, the single chip microcomputer is selected as N32G030C8L7.

[0028] The voltage power supply circuit includes a mains-to-DC 24V power supply circuit, a 24V-to-3.3V power supply circuit, and a 24V energy storage power supply circuit. In specific implementation, the voltage power supply circuit transforms the mains power into a power supply voltage for the microcontroller, signal isolation circuit, interface circuit, relay control amplifier circuit, motor drive circuit, serial port transceiver circuit, and fan overvoltage and overcurrent alarm circuit. The voltage power supply circuit provides stable and reliable power to ensure that the entire system can operate continuously and stably.

[0029] The signal isolation circuit includes a light emitting diode anode of a dual-channel high-speed photoelectric isolator U4 connected to one end of a resistor R20, a light emitting diode anode of a dual-channel high-speed photoelectric isolator U5 connected to one end of a resistor R21, a light emitting diode anode of a dual-channel high-speed photoelectric isolator U6 connected to one end of a resistor R23, and a light emitting diode anode of a dual-channel high-speed photoelectric isolator U7 connected to a resistor R25. In a specific implementation, the dual-channel high-speed photoelectric isolator U4 can be EL357N. The signal isolation circuit effectively prevents electrical interference by isolating signals between different circuits, thereby ensuring the purity and accuracy of the signal.

[0030] Optoelectronic isolator is a device used to isolate electrical signals. It can electrically isolate the input signal from the output signal to protect the controlled equipment and improve the stability and reliability of the system. Optoelectronic isolator has the characteristics of high-speed response, high isolation voltage, low power consumption and small size.

[0031] EL357N is a dual-channel high-speed optoelectronic isolator, which consists of a photodiode and a phototransistor. A photodiode is a device that can convert light energy into electrical energy, and a phototransistor is a device that can convert light energy into current. The working principle of EL357N is that the photodiode emits a light signal, and the phototransistor receives the light signal and converts it into a current signal, thereby achieving isolation between the input and output signals.

[0032] The working process of EL357N is: input signal isolation, when the input signal is applied to the input end of EL357N, the input photodiode is excited and emits a light signal of a certain intensity. Optical signal transmission, the light signal is transmitted in the optical coupling medium inside the photocoupler, and the optical coupling medium is usually a light-transparent organic material. Optical signal detection, the light signal reaches the output phototransistor, the phototransistor is excited, and a corresponding current signal is generated. Output signal isolation, the output signal is transmitted to the output end through the current signal of the phototransistor, realizing electrical isolation between the input and output signals.

[0033] The interface circuit includes the 5569-16P terminal. The interface circuit is the connection interface between the external device and the mainboard. The working principle is to exchange data with the external device. The interface circuit is a bridge connecting the external device and the internal circuit. It enables the fan control device to seamlessly connect with the external system to achieve remote monitoring and control.

[0034] The relay control amplifier circuit includes: one end of the relay K1A is connected to the collector of the transistor Q3, the emitter of the transistor Q3 is connected to one end of the resistor R15 and grounded, and the base of the transistor Q3 is connected to the other end of the resistor R15 and one end of the resistor R18 respectively. The function of the relay is to control the on-off of the circuit. The relay can quickly and accurately connect or disconnect the circuit according to the changes of the external signal to realize the automatic control of the circuit. This enables the circuit system to respond to changes in the external environment and improve the operating efficiency. The function of the amplifier is to enhance the signal. In the circuit system, the signal may be weakened due to reasons such as transmission distance and equipment loss. At this time, the amplifier can amplify the weak signal so that it can be transmitted unimpeded in the circuit. This is crucial to maintain the stability and accuracy of the signal. The resistor plays the role of limiting the current, dividing the voltage and stabilizing the circuit in the circuit. The resistor can accurately control the size of the current to prevent the circuit from being damaged due to excessive current. At the same time, the resistor can also realize the voltage division function, distribute the voltage to each circuit according to a certain proportion, and ensure that each circuit can obtain a stable working voltage. The relay control amplifier circuit is responsible for amplifying the weak control signal, thereby driving the relay to perform switching operations and control the start and stop and speed of the fan.

[0035] The motor drive circuit includes a dual-channel H-bridge motor driver chip U1. In specific implementation, the dual-channel H-bridge motor driver chip U1 can be, but is not limited to, DRV8841. DRV8841 is a dual H-bridge DC motor driver with the following technical parameters: operating voltage range: 2.5V to 12V, maximum output current: 1.5A, built-in current detection and limiting functions, support PWM control, built-in fault protection functions, including overcurrent, overtemperature and undervoltage protection. It can drive various types of motors such as DC motors, stepper motors and brushless DC motors. DRV8841 is characterized by high efficiency, low power consumption and strong reliability. The motor drive circuit is the power source in the fan control device. It accurately adjusts the operating state of the motor according to the control signal to achieve precise control of the fan.

[0036] The serial port transceiver circuit includes an RS485 communication transceiver chip U9. In a specific implementation, the RS485 communication transceiver chip U9 can be SP3485. SP3485 is a multi-protocol serial port transceiver, which can be used for various communication protocols such as RS-485, RS-422, MIL-STD1553B, etc. SP3485 adopts differential transmission technology and uses two independent but symmetrical cables for signal transmission, which can improve the anti-interference performance. When sending data, SP3485 generates positive / negative levels on the A / B lines by outputting driving current; when receiving data, it judges the received data value based on the level difference between the A / B lines.

[0037] The fan overvoltage and overcurrent alarm circuit includes: one end of the relay K2A is connected to the collector of the transistor Q2, the emitter of the transistor Q2 is connected to one end of the resistor R13 and grounded, and the base of the transistor Q2 is connected to one end of the resistor R14 and the other end of the resistor R13. Through the opening and closing of the extension voltage and current action relay, when the fan is overvoltage or overcurrent, the CPU gives PC15 a high level, the relay works, and the purpose of alarm is achieved.

[0038] In specific implementation, the fan control device of the utility model is also provided with a damper, which is arranged on the periphery of the fan. The motor drive circuit drives the motor to work so as to open and close the damper. The fan control device of the utility model can also be provided with a smoke sensor. The smoke sensor is used to sense the concentration of ambient smoke. When the fan rotates, the damper can open automatically; when the fan is turned off, the damper can also close automatically; when the power is off, the damper can also close automatically; when the fan is turned off, the damper can also close automatically; when the fan is turned on, the concentration of ambient smoke can also be sensed by the sensor, thereby controlling the speed of the fan rotation; the thicker the smoke, the faster the fan speed, and vice versa, the slower the fan rotates.

[0039] The utility model fan control device can realize the control of the fan by adding a stepping motor, a fan, and a device with a damper that can be installed in the fan to the circuit control board. When the manual button is pressed to start the extension, the damper can be opened automatically.

[0040] The utility model has the following beneficial effects through the design of the above embodiments: by setting a single-chip microcomputer, a voltage power supply circuit, a signal isolation circuit, an interface circuit, a relay control amplifier circuit, a motor drive circuit, a serial port transceiver circuit, and a fan overvoltage and overcurrent alarm circuit are all connected to the single-chip microcomputer; the voltage power supply circuit is used to power the fan control device; the signal isolation circuit is used to isolate the signals between the voltage power supply circuit, the voltage signal isolation circuit, the voltage interface circuit, the voltage relay control amplifier circuit, the voltage motor drive circuit, the voltage serial port transceiver circuit, and the voltage fan overvoltage and overcurrent alarm circuit to prevent electrical interference; the interface circuit is used to connect the fan control device to external equipment The relay control amplifier circuit is used to amplify the control signal to drive the relay to perform switching operations to control the start and stop and speed of the fan. The motor drive circuit is used to adjust the operating state of the motor according to the control signal to realize the control of the fan. The serial port transceiver circuit is used to send and receive data through the serial port, so that the device can communicate with the host computer to realize real-time data transmission and remote control. The fan overvoltage and overcurrent alarm circuit is used to trigger an alarm once the fan is detected to have an overvoltage or overcurrent abnormality, reminding the user to deal with it in time to prevent the fault from expanding. The fan can be controlled efficiently, safely and intelligently to provide stable and reliable wind support for various application scenarios.

[0041] The present invention is described according to specific embodiments, but those skilled in the art should understand that various changes and equivalent substitutions can be made without departing from the scope of the present invention. In addition, in order to adapt to specific occasions of the present invention technology, many modifications can be made to the present invention without departing from its protection scope. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all embodiments that fall within the scope of protection of the claims.

Claims

1. A fan control device, characterized in that: include: A single-chip microcomputer, a voltage power supply circuit, a signal isolation circuit, an interface circuit, a relay control amplifier circuit, a motor drive circuit, a serial port transceiver circuit, a fan overvoltage and overcurrent alarm circuit and a voltage fan all connected to the single-chip microcomputer, the voltage power supply circuit is used to power the fan control device, the signal isolation circuit is used to isolate the signals between the voltage power supply circuit, the voltage signal isolation circuit, the voltage interface circuit, the voltage relay control amplifier circuit, the voltage motor drive circuit, the voltage serial port transceiver circuit and the voltage fan overvoltage and overcurrent alarm circuit to prevent electrical interference, the interface circuit is used for the fan control device to connect external equipment, the relay control amplifier circuit is used to amplify the control signal, thereby driving the relay to perform switching operations to control the start and stop and speed of the fan, the motor drive circuit is used to adjust the running state of the motor according to the control signal to achieve control of the fan, the serial port transceiver circuit is used to receive and send data through the serial port, so that the device communicates with the host computer to achieve real-time data transmission and remote control, and the fan overvoltage and overcurrent alarm circuit is used to trigger an alarm once an abnormal overvoltage or overcurrent condition of the fan is detected, reminding the user to handle it in time to prevent the fault from expanding.

2. The fan control device according to claim 1, characterized in that: The single chip microcomputer is N32G030C8L7.

3. The fan control device according to claim 1, characterized in that: The voltage power supply circuit includes a mains-to-DC 24V power supply circuit, a 24V-to-3.3V power supply circuit, and a 24V energy storage power supply circuit.

4. The fan control device according to claim 1, characterized in that: The signal isolation circuit includes a light emitting diode anode of a dual-channel high-speed optoelectronic isolator U4 connected to one end of a resistor R20, a light emitting diode anode of a dual-channel high-speed optoelectronic isolator U5 connected to one end of a resistor R21, a light emitting diode anode of a dual-channel high-speed optoelectronic isolator U6 connected to one end of a resistor R23, and a light emitting diode anode of a dual-channel high-speed optoelectronic isolator U7 connected to a resistor R25.

5. The fan control device according to claim 1, characterized in that: The interface circuit includes a 5569-16P terminal.

6. The fan control device according to claim 1, characterized in that: The relay control amplifier circuit includes: one end of the relay K1A is connected to the collector of the transistor Q3, the emitter of the transistor Q3 is connected to one end of the resistor R15 and grounded, and the base of the transistor Q3 is respectively connected to the other end of the resistor R15 and one end of the resistor R18.

7. The fan control device according to claim 1, characterized in that: The motor driving circuit includes a dual-channel H-bridge motor driving chip U1.

8. The fan control device according to claim 1, characterized in that: The serial port transceiver circuit includes an RS485 communication transceiver chip U9.

9. The fan control device according to any one of claims 1 to 8, characterized in that: The fan overvoltage and overcurrent alarm circuit includes: one end of the relay K2A is connected to the collector of the transistor Q2, the emitter of the transistor Q2 is connected to one end of the resistor R13 and is grounded, and the base of the transistor Q2 is connected to one end of the resistor R14 and the other end of the resistor R13.

10. The fan control device according to claim 9, characterized in that: The device is also provided with an air door, and the air door is arranged on the periphery of the fan.

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