Ceiling fan control circuit with vibration alarm function

Abstract

The utility model discloses a ceiling fan control circuit with a vibration alarm function, which comprises a control assembly arranged on a ceiling fan and a fan output control circuit connected with a ceiling fan motor to control the ceiling fan to rotate, and a vibration detection circuit used for detecting vibration of the ceiling fan is arranged on the control assembly. The main control circuit is respectively connected with the fan output control circuit and the vibration detection circuit, presets a normal working vibration frequency range of the ceiling fan, and controls the fan output control circuit to stop working when the vibration frequency detected by the vibration detection circuit is not within the normal working vibration frequency range of the ceiling fan when the ceiling fan works; the real-time vibration frequency of the fan is detected through the vibration detection circuit, whether the fan vibrates abnormally or not is judged by comparing the preset normal working vibration frequency with the real-time vibration frequency through the main control circuit, alarm prompt is given and rotation of the fan is stopped when the vibration is abnormal, accidents are avoided, and the use safety is improved.

Description

[Technical field]

[0001] The utility model relates to a ceiling fan control circuit with a vibration alarm function. [Background Technology]

[0002] Existing ceiling fans are not firmly installed, or when the fan screws become loose after long-term use, the ceiling fan may swing or vibrate significantly, which may easily cause the ceiling fan to fall. [Utility Model Content]

[0003] The utility model overcomes the deficiencies of the prior art and provides a ceiling fan control circuit with a vibration alarm function.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A ceiling fan control circuit with a vibration alarm function is characterized by comprising a control component disposed on the ceiling fan and a fan output control circuit connected to the ceiling fan motor for controlling the rotation of the ceiling fan, the control component being provided with a vibration detection circuit for detecting vibration of the ceiling fan, and a main control circuit connected to the fan output control circuit and the vibration detection circuit, respectively, and having a preset normal operating vibration frequency range of the ceiling fan, and controlling the fan output control circuit to stop operating when the vibration frequency detected by the vibration detection circuit is outside the normal operating vibration frequency range of the ceiling fan during operation.

[0006] The ceiling fan control circuit with a vibration alarm function as described above is characterized in that the control component is installed on the central hanging bell of the ceiling fan or the ceiling fan motor.

[0007] The ceiling fan control circuit with a vibration alarm function as described above is characterized in that the fan output control circuit is arranged on the control component.

[0008] The ceiling fan control circuit with a vibration alarm function as described above is characterized in that: the control component is provided with a power supply circuit connected to the mains power supply for outputting 24V power supply and 5V power supply after rectification, transformation and voltage reduction, a buzzer circuit connected to the main control circuit for audible feedback of the ceiling fan operating status or abnormality alarm, a power light indicator circuit for indicating the power-on status of the ceiling fan, a wireless receiving circuit connected to the main control circuit for receiving wireless control signals, a zero-crossing detection circuit connected to the power supply circuit for detecting a zero-crossing signal and transmitting it to the main control circuit, a current sampling circuit respectively connected to the fan output control circuit and the main control circuit for detecting the current of the ceiling fan motor, and an overcurrent comparison circuit respectively connected to the fan output control circuit and the main control circuit for overcurrent comparison.

[0009] The ceiling fan control circuit with a vibration alarm function as described above is characterized in that: the vibration detection circuit includes a vibration switch VT, the main control circuit includes a control chip U4, the pin 1 of the control chip U4 is respectively connected to one end of a resistor R54, one end of a capacitor C14, and one end of a capacitor C15, the other end of the resistor R54 is connected to a 5V power supply, the other ends of the capacitors C14 and C15 are respectively grounded, the pin 2 of the control chip U4 is respectively connected to one end of a capacitor C21, one end of a resistor R41, and one end of a resistor R48, the other ends of the capacitor C21 and the other ends of the resistor R48 are respectively grounded, the other end of the resistor R41 is connected to a 24V power supply, the pin 3 of the control chip U4 is connected to a zero-crossing detection circuit, and the pin 4 of the control chip U4 is connected to an overcurrent comparison circuit. Pin 6 of the control chip U4 is respectively connected to one end of the resistor R55 and one end of the vibration switch VT, the other end of the resistor R55 is connected to the 5V power supply, the other end of the vibration switch VT is grounded, pin 7 of the control chip U4 is grounded through capacitor C18, pin 8 of the control chip U4 is respectively connected to the 24V power supply and one end of the capacitor C17, the other end of the capacitor C17 is grounded, pins 9-12 and pins 13-14 of the control chip U4 are respectively connected to the fan output control circuit, pin 15 of the control chip U4 is grounded, pins 16-19 of the control chip U4 are respectively connected to the current sampling circuit, pin 21 of the control chip U4 is connected to the wireless receiving circuit, pin 22 of the control chip U4 is connected to the buzzer circuit, and pin 24 of the control chip U4 is grounded through capacitor C16.

[0010] The above-mentioned ceiling fan control circuit with a vibration alarm function is characterized in that: the fan output control circuit includes a driver chip M2, a driver chip M3, a driver chip M4 and a ceiling fan motor wiring port JP1, the driver chip M2 pin 1 is respectively connected to one end of the resistor R26, the current sampling circuit, and one end of the resistor R25, the other end of the resistor R25 is respectively connected to one end of the resistor R30, the driver chip M4 pin 1, and one end of the resistor R37, the other end of the resistor R37 is grounded, the driver chip M2 pin 2 is respectively connected to one end of the resistor R26 and one end of the resistor R27, the other end of the resistor R27 is connected to the main control circuit, the driver chip M2 pin 3 is respectively connected to the driver chip M3 pin 3, the driver chip M4 pin 3, and one end of the fuse F2, the other end of the fuse F2 is connected to the 24V power supply, the driver chip M2 pin 3 is respectively connected to one end of the resistor R29 and the driver chip M2 pin 4 through the resistor R28, the other end of the resistor R29 is connected to the main control circuit, and the driver chip M2 pins 5-8 are respectively connected to the ceiling fan motor wiring port JP1 Pin 1 is connected, and pin 1 of the driver chip M3 is connected to the other end of the resistor R31, the current sampling circuit, and one end of the resistor R30. The other end of the resistor R31 is connected to pin 2 of the driver chip M3 and one end of the resistor R32. The other end of the resistor R32 is connected to the main control circuit. Pin 3 of the driver chip M3 is connected to pin 4 of the driver chip M3 and one end of the resistor R34 through the resistor R33. The other end of the resistor R34 is connected to the main control circuit. Pins 5-8 of the driver chip M3 are connected to the JP1 pins of the ceiling fan motor terminal. 2, pin 1 of the driver chip M4 is respectively connected to one end of the resistor R35, the overcurrent comparison circuit, and the current sampling circuit. The other end of the resistor R35 is respectively connected to pin 2 of the driver chip M4 and one end of the resistor R36. The other end of the resistor R36 is connected to the main control circuit. Pin 3 of the driver chip M43 is respectively connected to pin 4 of the driver chip M4 and one end of the resistor R39 through the resistor R38. The other end of the resistor R39 is connected to the main control circuit. Pins 5-8 of the driver chip M4 are respectively connected to pin 3 of the ceiling fan motor terminal JP1.

[0011] The ceiling fan control circuit with a vibration alarm function as described above is characterized in that: a buzzer circuit includes a buzzer BZ1, one end of the buzzer BZ1 is respectively connected to one end of a resistor R40 and one end of a resistor R49, the other end of the resistor R49 is connected to a 24V power supply, the other end of the buzzer BZ1 is respectively connected to the other end of the resistor R40 and the collector of a transistor Q1, the emitter of the transistor Q1 is grounded, the positive end of the transistor Q1 is respectively connected to one end of a resistor R45 and one end of a resistor R53, the other end of the resistor R53 is grounded, and the other end of the resistor R45 is connected to a main control circuit; a power light indication circuit includes an LED lamp LED1, the cathode end of the LED lamp LED1 is grounded, and the anode end of the LED lamp LED1 is connected to a 5V power supply via a resistor R47.

[0012] The ceiling fan control circuit with a vibration alarm function as described above is characterized in that: the wireless receiving circuit includes a wireless receiving chip RX1, the pin 1 of the wireless receiving chip RX1 is connected to the antenna ANT1 through the capacitor C12, the pin 2 of the wireless receiving chip RX1 is grounded, the pin 3 of the wireless receiving chip RX1 is respectively connected to one end of the capacitor C7 and one end of the resistor R20, the other end of the capacitor C7 is grounded, the other end of the resistor R20 is connected to a 5V power supply, the pin 5 of the wireless receiving chip RX1 is respectively connected to one end of the capacitor C5 and the main control circuit through the resistor R17, and the other end of the capacitor C5 is grounded; the zero-crossing detection circuit includes a photocoupler U3 , pin 1 of the photocoupler U3 is connected to the input end of the power supply circuit through resistors R19 and R18, pin 2 of the photocoupler U3 is connected to the positive end of the diode D5, and the negative end of the diode D5 is connected to the input end of the power supply circuit, pin 3 of the photocoupler U3 is grounded, pin 4 of the photocoupler U3 is respectively connected to one end of the capacitor C13, one end of the resistor R21, one end of the capacitor C11, and one end of the resistor R23, the other end of the capacitor C13 and the other end of the capacitor C11 are respectively grounded, the other end of the resistor R21 is connected to the 5V power supply, the other end of the resistor R23 is respectively connected to one end of the capacitor C10 and the main control circuit, and the other end of the capacitor C10 is grounded.

[0013] The ceiling fan control circuit with a vibration alarm function as described above is characterized in that: a current sampling circuit includes a capacitor C19 and a capacitor C20, one end of the capacitor C19 is respectively connected to one end of the resistor R42 and the main control circuit, the other end of the resistor R42 is connected to the fan output control circuit, the other end of the capacitor C19 is respectively connected to one end of the resistor R51 and the main control circuit, the other end of the resistor R51 is connected to the fan output control circuit, one end of the capacitor C20 is respectively connected to one end of the resistor R43 and the main control circuit, the other end of the resistor R43 is connected to the fan output control circuit, the other end of the capacitor C20 is respectively connected to one end of the resistor R52 and the main control circuit, and the other end of the resistor R52 is connected to the fan output control circuit; an overcurrent comparison circuit includes a resistor R46, one end of the resistor R46 is connected to the fan output control circuit, the other end of the resistor R46 is respectively connected to the main control circuit, one end of the capacitor C22, one end of the resistor R44, and one end of the resistor R50, the other end of the resistor R44 is connected to a 5V power supply, and the other end of the capacitor C22 and the other end of the resistor R50 are respectively grounded.

[0014] The ceiling fan control circuit with a vibration alarm function as described above is characterized in that: the power supply circuit includes an AC input rectifier circuit connected to the mains power supply for converting the AC mains power into DC power; the AC input rectifier circuit is connected to an AC-DC power supply circuit that converts DC power into AC power and outputs a 24V power supply after voltage transformation; the AC-DC power supply circuit is connected to a DC-DC power supply circuit that steps down the 24V power supply to output a 5V power supply; and the zero-crossing detection circuit is connected to the input end of the AC input rectifier circuit.

[0015] The beneficial effects of the utility model are:

[0016] The utility model provides a vibration detection circuit on the control component, detects the real-time vibration frequency of the fan through the vibration detection circuit, and determines whether the fan vibration is abnormal by comparing the preset normal working vibration frequency with the real-time vibration frequency through the main control circuit, and alarms and stops the fan rotation when the vibration is abnormal, thereby avoiding accidents and improving the safety of use. At the same time, the vibration detection circuit is provided on the control component to form an integral whole, without the need for external connection, simplifying the structure, and facilitating and quick installation in the ceiling fan. [Brief Description of the Drawings]

[0017] Figure 1 This is the principle diagram of the utility model;

[0018] Figure 2 This is the fan output control circuit diagram of the utility model;

[0019] Figure 3 This is the main control circuit diagram of the utility model;

[0020] Figure 4 This is the power supply circuit diagram of the utility model;

[0021] Figure 5 This is the circuit diagram of the buzzer of this utility model;

[0022] Figure 6 This is the power light indication circuit diagram of the utility model;

[0023] Figure 7 This is the wireless receiving circuit diagram of the utility model;

[0024] Figure 8 This is the zero-crossing detection circuit diagram of the utility model;

[0025] Figure 9 This is the current sampling circuit diagram of the utility model;

[0026] Figure 10 This is the overcurrent comparison circuit diagram of the utility model. [Specific implementation method]

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In addition, the descriptions of "preferred", "sub-preferred", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "preferred" or "sub-preferred" may explicitly or implicitly include at least one such feature.

[0029] like Figure 1-10 As shown, a ceiling fan control circuit with a vibration alarm function includes a control assembly mounted on the ceiling fan and a fan output control circuit 1 connected to the ceiling fan motor to control the rotation of the ceiling fan. The control assembly is equipped with a vibration detection circuit 2 for detecting vibrations of the ceiling fan, and a main control circuit 3 connected to the fan output control circuit 1 and the vibration detection circuit 2, respectively. The main control circuit 3 is configured to preset a normal operating vibration frequency range for the ceiling fan and control the fan output control circuit 1 to stop operating when the vibration frequency detected by the vibration detection circuit 2 is outside the normal operating frequency range. After the ceiling fan is installed, the ceiling fan is started and operated at different wind speed levels. The main control circuit 3 learns the vibration frequencies of the ceiling fan at each wind speed level under normal operating conditions, generates a normal operating frequency range for the ceiling fan, and records the range. During operation, the vibration detection circuit 2 detects the real-time vibration frequency of the ceiling fan, and the main control circuit 3 compares the real-time vibration frequency with the normal operating frequency. If the real-time vibration frequency is outside the normal operating frequency range, the fan vibration is determined to be abnormal, and the main control circuit 3 controls the fan output control circuit 1 to drive the ceiling fan motor to stop operating, thereby improving the safety of the ceiling fan.

[0030] In this case, the vibration detection circuit 2 is arranged on the control component to form an integral whole, which is convenient for quick installation on the ceiling fan; at the same time, the control component is installed on the central hanging bell of the ceiling fan or the ceiling fan motor. The control component can be installed in different positions of the ceiling fan according to actual application requirements, thereby improving the vibration detection accuracy of different application scenarios; on the other hand, the fan output control circuit 1 can be independently arranged outside the control component, or it can be arranged on the control component to form an integral whole, and can be set according to actual application requirements.

[0031] In this case, after the power supply circuit 4 is powered on, the AC mains power is converted into DC power through the AC input rectifier circuit 41 and output to the AC-DC power supply circuit 42; the AC-DC power supply circuit 42 converts the DC power into AC power and outputs a 24V power supply after voltage transformation, which supplies power to the fan output control circuit 1, the main control circuit 3, and the buzzer circuit 5; the DC-DC power supply circuit 43 steps down the 24V DC power and outputs a 5V power supply, which supplies power to the main control circuit 3, the power light indication circuit 6, the wireless receiving circuit 7, the zero-crossing detection circuit 8, and the overcurrent comparison circuit 10.

[0032] In this case, when the control chip U4 of the main control circuit 3 learns the normal operating vibration frequency range of the ceiling fan, a learning signal is sent to the wireless receiving chip RX1 of the wireless receiving circuit 7 via a wireless remote control. After receiving the learning signal, the control chip U4 enters the learning state, controls the fan output control circuit 1 to drive the ceiling fan motor and change the wind speed. The vibration switch VT detects the vibration frequency to generate and record the normal operating vibration frequency range of the ceiling fan. When the fan speed needs to be adjusted during use, a speed adjustment signal is sent to the wireless receiving chip RX1 of the wireless receiving circuit 7 via a wireless remote control. After receiving the control signal, the control chip U4 detects the power supply zero-crossing signal via the optocoupler U3 of the zero-crossing detection circuit 8. The main control circuit 3 then controls the fan output control circuit 1 to switch the ceiling fan motor speed based on the zero-crossing signal. During operation, the current sampling circuit 9 samples the operating current of the ceiling fan motor. The main control circuit 3 limits the motor's power or output current based on the sampled current. It also detects phase loss, short circuit, or stall, controls the motor to drive at a constant torque, and calculates the position of the motor's rotor. Simultaneously, the overcurrent comparison circuit 10 compares the motor's real-time current with a preset current. If an overcurrent condition is detected, the motor is stopped for protection. In this case, buzzer BZ1 in buzzer circuit 5 issues an alarm when the fan vibrates abnormally or when the motor is overcurrent, and provides audio feedback during gear shifts. LED1 in power indicator circuit 6 illuminates when power is supplied to power supply circuit 4, indicating the power on / off status.

[0033] The above are only preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or directly or indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A ceiling fan control circuit with a vibration alarm function, characterized in that: The invention comprises a control component arranged on a ceiling fan and a fan output control circuit (1) connected to a ceiling fan motor for controlling the rotation of the ceiling fan, a vibration detection circuit (2) for detecting the vibration of the ceiling fan, and a main control circuit (3) respectively connected to the fan output control circuit (1) and the vibration detection circuit (2) and having a preset normal operating vibration frequency range of the ceiling fan. When the vibration frequency detected by the vibration detection circuit (2) is not within the normal operating vibration frequency range of the ceiling fan during operation of the ceiling fan, the main control circuit (3) controls the fan output control circuit (1) to stop operating.

2. The ceiling fan control circuit with vibration alarm function according to claim 1, characterized in that: The control assembly is mounted on the center chime of the ceiling fan or on the ceiling fan motor.

3. The ceiling fan control circuit with vibration alarm function according to claim 1, characterized in that: The fan output control circuit (1) is arranged on the control component.

4. The ceiling fan control circuit with vibration alarm function according to claim 1, characterized in that: The control component is provided with a power supply circuit (4) connected to the mains for outputting 24V power supply and 5V power supply after rectification, transformation and voltage reduction, a buzzer circuit (5) connected to the main control circuit (3) for providing sound feedback on the working state of the ceiling fan or abnormal alarm, a power light indicating circuit (6) for indicating the power-on state of the ceiling fan, a wireless receiving circuit (7) connected to the main control circuit (3) for receiving wireless control signals, a zero-crossing detection circuit (8) connected to the power supply circuit (4) for detecting a zero-crossing signal and sending it to the main control circuit (3), a current sampling circuit (9) connected to the fan output control circuit (1) and the main control circuit (3) for detecting the current of the ceiling fan motor, and an overcurrent comparison circuit (10) connected to the fan output control circuit (1) and the main control circuit (3) for overcurrent comparison.

5. The ceiling fan control circuit with vibration alarm function according to claim 4, characterized in that: The vibration detection circuit (2) includes a vibration switch VT, and the main control circuit (3) includes a control chip U4. The pin 1 of the control chip U4 is respectively connected to one end of a resistor R54, one end of a capacitor C14, and one end of a capacitor C15. The other end of the resistor R54 is connected to a 5V power supply. The other ends of the capacitors C14 and C15 are respectively grounded. The pin 2 of the control chip U4 is respectively connected to one end of a capacitor C21, one end of a resistor R41, and one end of a resistor R48. The other ends of the capacitor C21 and the other ends of the resistor R48 are respectively grounded. The other end of the resistor R41 is connected to a 24V power supply. The pin 3 of the control chip U4 is connected to a zero-crossing detection circuit (8). The pin 4 of the control chip U4 is connected to an overcurrent comparison circuit (10). The pin 6 of the control chip U4 is respectively connected to resistors One end of resistor R55 and one end of the vibration switch VT are connected, the other end of resistor R55 is connected to a 5V power supply, the other end of the vibration switch VT is grounded, pin 7 of control chip U4 is grounded through capacitor C18, pin 8 of control chip U4 is respectively connected to a 24V power supply and one end of capacitor C17, the other end of capacitor C17 is grounded, pins 9-12 and pins 13-14 of control chip U4 are respectively connected to a fan output control circuit (1), pin 15 of control chip U4 is grounded, pins 16-19 of control chip U4 are respectively connected to a current sampling circuit (9), pin 21 of control chip U4 is connected to a wireless receiving circuit (7), pin 22 of control chip U4 is connected to a buzzer circuit (5), and pin 24 of control chip U4 is grounded through capacitor C16.

6. The ceiling fan control circuit with vibration alarm function according to claim 4, characterized in that: The fan output control circuit (1) includes a driver chip M2, a driver chip M3, a driver chip M4 and a ceiling fan motor connection port JP1. The driver chip M2 pin 1 is respectively connected to one end of the resistor R26, the current sampling circuit (9), and one end of the resistor R25. The other end of the resistor R25 is respectively connected to one end of the resistor R30, the driver chip M4 pin 1, and one end of the resistor R37. The other end of the resistor R37 is grounded. The driver chip M2 pin 2 is respectively connected to one end of the resistor R26 and one end of the resistor R27. The other end is connected to the main control circuit (3), the driver chip M2 pin 3 is respectively connected to the driver chip M3 pin 3, the driver chip M4 pin 3, and one end of the fuse F2, the other end of the fuse F2 is connected to the 24V power supply, the driver chip M2 pin 3 is respectively connected to one end of the resistor R29 and the driver chip M2 pin 4 through the resistor R28, the other end of the resistor R29 is connected to the main control circuit (3), the driver chip M2 pins 5-8 are respectively connected to the ceiling fan motor wiring port JP1 pin 1, the driver chip M3 pin 1 is respectively connected to the power supply The other end of the resistor R31 is connected to the current sampling circuit (9) and one end of the resistor R30. The other end of the resistor R31 is connected to the driver chip M3 pin 2 and one end of the resistor R32 respectively. The other end of the resistor R32 is connected to the main control circuit (3). The driver chip M3 pin 3 is connected to the driver chip M3 pin 4 and one end of the resistor R34 respectively through the resistor R33. The other end of the resistor R34 is connected to the main control circuit (3). The driver chip M3 pins 5-8 are connected to the ceiling fan motor terminal JP1 pin 2 respectively. The driver chip M4 pin 1 is respectively connected to one end of the resistor R35, the overcurrent comparison circuit (10), and the current sampling circuit (9); the other end of the resistor R35 is respectively connected to the driver chip M4 pin 2 and one end of the resistor R36; the other end of the resistor R36 is connected to the main control circuit (3); the driver chip M43 pin 3 is respectively connected to the driver chip M4 pin 4 and one end of the resistor R39 through the resistor R38; the other end of the resistor R39 is connected to the main control circuit (3); the driver chip M4 pins 5-8 are respectively connected to the ceiling fan motor terminal JP1 pin 3.

7. The ceiling fan control circuit with vibration alarm function according to claim 4, characterized in that: The buzzer circuit (5) includes a buzzer BZ1, one end of the buzzer BZ1 is connected to one end of a resistor R40 and one end of a resistor R49 respectively, the other end of the resistor R49 is connected to a 24V power supply, the other end of the buzzer BZ1 is connected to the other end of the resistor R40 and the collector of the transistor Q1 respectively, the emitter of the transistor Q1 is grounded, the positive end of the transistor Q1 is connected to one end of a resistor R45 and one end of a resistor R53 respectively, the other end of the resistor R53 is grounded, and the other end of the resistor R45 is connected to the main control circuit (3); the power light indication circuit (6) includes an LED lamp LED1, the negative end of the LED lamp LED1 is grounded, and the positive end of the LED lamp LED1 is connected to a 5V power supply through a resistor R47.

8. The ceiling fan control circuit with vibration alarm function according to claim 4, characterized in that: The wireless receiving circuit (7) includes a wireless receiving chip RX1, wherein the pin 1 of the wireless receiving chip RX1 is connected to the antenna ANT1 through a capacitor C12, the pin 2 of the wireless receiving chip RX1 is grounded, the pin 3 of the wireless receiving chip RX1 is respectively connected to one end of the capacitor C7 and one end of the resistor R20, the other end of the capacitor C7 is grounded, the other end of the resistor R20 is connected to a 5V power supply, the pin 5 of the wireless receiving chip RX1 is respectively connected to one end of the capacitor C5 and the main control circuit (3) through a resistor R17, and the other end of the capacitor C5 is grounded; the zero-crossing detection circuit (8) includes a photoelectric coupler U3, wherein the pin 1 of the photoelectric coupler U3 is connected to the main control circuit (3) through a resistor R17. Resistor R19 and resistor R18 are connected to the input end of the power supply circuit (4), pin 2 of the photoelectric coupler U3 is connected to the positive end of the diode D5, the negative end of the diode D5 is connected to the input end of the power supply circuit (4), pin 3 of the photoelectric coupler U3 is grounded, pin 4 of the photoelectric coupler U3 is respectively connected to one end of the capacitor C13, one end of the resistor R21, one end of the capacitor C11, and one end of the resistor R23, the other end of the capacitor C13 and the other end of the capacitor C11 are respectively grounded, the other end of the resistor R21 is connected to a 5V power supply, the other end of the resistor R23 is respectively connected to one end of the capacitor C10 and the main control circuit (3), and the other end of the capacitor C10 is grounded.

9. The ceiling fan control circuit with vibration alarm function according to claim 4, characterized in that: The current sampling circuit (9) includes a capacitor C19 and a capacitor C20. One end of the capacitor C19 is connected to one end of the resistor R42 and the main control circuit (3), and the other end of the resistor R42 is connected to the fan output control circuit (1). The other end of the capacitor C19 is connected to one end of the resistor R51 and the main control circuit (3), and the other end of the resistor R51 is connected to the fan output control circuit (1). One end of the capacitor C20 is connected to one end of the resistor R43 and the main control circuit (3), and the other end of the resistor R43 is connected to the fan output control circuit (1). The other end of the capacitor C20 is connected to one end of the resistor R52 and the main control circuit (3), and the other end of the resistor R52 is connected to the fan output control circuit (1); the overcurrent comparison circuit (10) includes a resistor R46, one end of the resistor R46 is connected to the fan output control circuit (1), and the other end of the resistor R46 is connected to the main control circuit (3), one end of the capacitor C22, one end of the resistor R44, and one end of the resistor R50, and the other end of the resistor R44 is connected to a 5V power supply. The other end of the capacitor C22 and the other end of the resistor R50 are grounded.

10. The ceiling fan control circuit with vibration alarm function according to claim 4, characterized in that: The power supply circuit (4) includes an AC input rectifier circuit (41) connected to the mains for converting the AC mains into DC power. The AC input rectifier circuit (41) is connected to an AC-DC power supply circuit (42) for converting DC power into AC power and outputting a 24V power supply after voltage transformation. The AC-DC power supply circuit (42) is connected to a DC-DC power supply circuit (43) for stepping down the 24V power supply into a 5V power supply. The zero-crossing detection circuit (8) is connected to the input end of the AC input rectifier circuit (41).

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