Ceiling fan controller, control method and ceiling fan

Abstract

The invention provides a ceiling fan controller, a control method and a ceiling fan, the ceiling fan controller comprises a gear switching circuit and a ceiling fan control circuit, the gear switching circuit is used for converting an accessed alternating current power supply signal waveform into a power supply signal waveform corresponding to a switching gear when the gear switching circuit is operated by a user to trigger the switching gear; the ceiling fan control circuit is used for recognizing the power signal waveform output by the gear switching circuit and controlling the motor to operate at the corresponding rotating speed according to the power signal waveform. The gear switching circuit and the ceiling fan control circuit are integrated, a user can adjust the rotating speed of the ceiling fan only through simple gear switching operation, the gear switching circuit can be directly installed to replace an existing conventional wall control circuit, rewiring is not needed, the installation cost is reduced, and the installation time is shortened; the ceiling fan controller is simple in structure and relatively low in maintenance cost, does not need complex components such as a wireless communication module and a battery, and is not easily interfered by the outside.

Description

Technical Field

[0001] The present invention relates to the technical field of fans, and in particular to a ceiling fan controller, a control method and a ceiling fan. Background Art

[0002] There are many AC ceiling fans in the market, but as consumer demand continues to evolve, people are increasingly inclined to choose more energy-efficient DC fans as a substitute. However, traditional ceiling fans use induction motors to drive the fan blades. Induction motors are directly driven by AC power. The speed control principle is to directly use thyristors to adjust the live wire voltage or capacitors to adjust the live wire voltage to achieve speed regulation. The drive of a brushless DC motor is to first convert AC power into DC power, and then use field effect tubes to drive the motor. Therefore, the drive principle of a brushless DC ceiling fan is different from that of a traditional ceiling fan, which results in the speed regulation method of a traditional ceiling fan being unable to be applied to a brushless DC ceiling fan.

[0003] At present, many DC brushless ceiling fans use RF wireless signals to achieve fan control. Wireless transmitters are either handheld or wall-controlled. There are many ways to power the wall-controlled wireless transmitters, including battery power, live neutral line power, and single live line power. However, they have the following defects: 1. They are easily interfered by other wireless signals of the same frequency; 2. The maintenance cost is also high after the wall control is damaged; 3. The production cost is high; 4. The battery needs to be replaced regularly; 5. The handheld transmitter is easy to lose. The above-mentioned disadvantages of speed control have greatly limited the popularity of DC brushless ceiling fans in the market. Therefore, it is necessary to propose a DC brushless ceiling fan speed control system that reduces maintenance costs and production costs while reducing user inconvenience. Summary of the invention

[0004] The main purpose of the present invention is to provide a ceiling fan controller, a control method and a ceiling fan, aiming to solve the problems of high maintenance cost, high production cost and inconvenience for users in traditional DC brushless ceiling fan speed control systems.

[0005] In view of the above problems, the present invention proposes a ceiling fan controller, comprising a gear switching circuit and a ceiling fan control circuit, wherein the input end of the gear switching circuit is connected to the input end of the AC power supply end, and the output end of the gear switching circuit is electrically connected to the input end of the ceiling fan control circuit;

[0006] The gear switching circuit is used to convert the input AC power signal waveform into a power signal waveform corresponding to the switched gear when the gear switching is triggered by a user operation;

[0007] The ceiling fan control circuit is used to identify the power signal waveform output by the gear switching circuit, and control the motor to run at a corresponding speed according to the power signal waveform.

[0008] Optionally, the ceiling fan control circuit includes a signal detection circuit, a rectifier and filter circuit, an MCU circuit and a motor drive circuit; the input end of the signal detection circuit and the input end of the rectifier and filter circuit are electrically connected to the gear switching circuit, the output end of the signal detection circuit is electrically connected to the MCU circuit, and the output end of the rectifier and filter circuit is electrically connected to the MCU circuit and the motor drive circuit;

[0009] The signal detection circuit is used to detect the positive half-wave signal and the negative half-wave signal in the power signal output by the gear switching circuit, and output the corresponding positive / negative half-wave detection signal;

[0010] The rectifier and filter circuit is used to convert the power signal output by the gear switching circuit into a DC power signal to supply power to the MCU circuit and the motor drive circuit;

[0011] The MCU circuit is used to receive the positive / negative half-wave detection signal output by the signal detection circuit, and output a corresponding control signal to the motor drive circuit;

[0012] The motor driving circuit is used to control the motor speed of the ceiling fan according to the control signal output by the MCU circuit.

[0013] Optionally, the gear switching circuit includes a gear switch and a waveform conversion circuit, one end of the switch is connected to the input end of the AC power supply, and the other end can be electrically connected to one of the multiple input ends of the waveform conversion circuit or the input end of the ceiling fan control circuit, and the output end of the waveform conversion circuit is electrically connected to the input end of the ceiling fan control circuit;

[0014] When the gear switch is operated by a user to trigger the gear switching, the other end of the gear switch is electrically connected to a corresponding input end of the waveform conversion circuit;

[0015] When a corresponding input terminal in the waveform conversion circuit is connected, the input AC power signal waveform is converted into a power signal waveform corresponding to the switching gear.

[0016] Optionally, there are multiple waveform conversion circuits, the input end of each waveform conversion circuit is electrically connected to a switch, and the output end of each waveform conversion circuit is electrically connected to a ceiling fan control circuit. The multiple waveform conversion circuits are used to change the waveform of the AC power supply to obtain power supply signals with different waveforms.

[0017] Optionally, the plurality of waveform transformation circuits include a first waveform transformation circuit, a second waveform transformation circuit, a third waveform transformation circuit and a fourth waveform transformation circuit;

[0018] The first waveform conversion circuit includes a first diode and a first resistor, the cathode of the first diode is electrically connected to the gear switch, the anode is electrically connected to the input end of the ceiling fan control circuit, and the two ends of the first resistor are electrically connected to the two ends of the first diode;

[0019] The second gear circuit includes a second diode and a second resistor, the anode of the second diode is electrically connected to the gear switch, the cathode is electrically connected to the input end of the ceiling fan control circuit, and the two ends of the second resistor are electrically connected to the two ends of the second diode;

[0020] The third waveform conversion circuit includes a third diode, the cathode of the third diode is electrically connected to the gear switch, and the anode is electrically connected to the input end of the ceiling fan control circuit;

[0021] The fourth waveform conversion circuit includes a fourth diode, the anode of the fourth diode is electrically connected to the gear switch, and the cathode of the fourth diode is electrically connected to the input end of the ceiling fan control circuit.

[0022] Optionally, the signal detection circuit includes a negative half-wave detection circuit and a positive half-wave detection circuit connected in parallel, wherein the input end of the negative half-wave detection circuit and the input end of the positive half-wave detection circuit are electrically connected to a gear switching circuit, and the output end of the negative half-wave detection circuit and the output end of the positive half-wave detection circuit are electrically connected to an MCU circuit;

[0023] The negative half-wave detection circuit is used to detect the negative half-wave signal in the power signal output by the gear switching circuit, and output a corresponding negative half-wave detection signal;

[0024] The positive half-wave detection circuit is used to detect the positive half-wave signal in the power supply signal output by the gear switching circuit, and output a corresponding positive half-wave detection signal.

[0025] Optionally, the AC power supply end includes a live wire and a neutral wire, the live wire is electrically connected to the ceiling fan control circuit through the gear switching circuit, and the neutral wire is electrically connected to the ceiling fan control circuit;

[0026] The negative half-wave detection circuit comprises a third resistor and a first optical coupler, the positive electrode of the light-emitting end of the first optical coupler is electrically connected to the neutral line, the negative electrode is electrically connected to the output end of the gear switching circuit through the third resistor, and the receiving end of the first optical coupler is electrically connected to the MCU circuit;

[0027] The first optical coupler is used to convert the negative half-wave signal in the power supply signal into an optical signal and then convert it into a negative half-wave signal to output to the MCU circuit;

[0028] The positive half-wave detection circuit includes a fourth resistor and a second optocoupler, the positive electrode of the light-emitting end of the second optocoupler is electrically connected to the output end of the gear switching circuit through the fourth resistor, the negative electrode is electrically connected to the neutral line, and the receiving end of the second optocoupler is electrically connected to the MCU circuit.

[0029] The second optical coupler is used to convert the positive half-wave signal in the power supply signal into an optical signal and then convert it into a positive half-wave signal to output to the MCU circuit;

[0030] Optionally, the rectification and filtering circuit is provided with a first output power supply;

[0031] The receiving end of the first optical coupler and the receiving end of the second optical coupler respectively include a phototransistor, the first output power supply is electrically connected to the input end of the phototransistor through a resistor, and the output end of the phototransistor is electrically connected to the MCU circuit;

[0032] The phototransistor is used to receive the light signal emitted by the light-emitting end and convert it into an electrical signal.

[0033] The present invention further provides a ceiling fan, comprising a ceiling fan body and the ceiling fan controller as described above.

[0034] The present invention also provides a ceiling fan control method, the control method is based on the ceiling fan controller as described above, and the control method comprises the following steps:

[0035] When the gear is switched by an operation, the AC power waveform connected is converted into a power signal waveform corresponding to the switched gear;

[0036] The power signal waveform output by the power switching circuit is identified, and the motor is controlled to run at a corresponding speed according to the power signal waveform.

[0037] The present invention integrates a gear switching circuit and a ceiling fan control circuit. The user can adjust the speed of the ceiling fan by a simple gear switching operation, thereby improving the convenience of use. The gear switching circuit can be directly installed to replace the existing conventional wall control circuit without the need for rewiring, thereby reducing the installation cost and time. The ceiling fan controller has a simple structure and relatively low maintenance cost, and does not require complex wireless communication modules, batteries and other components, and is not easily affected by external interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0039] Figure 1 A circuit framework diagram of a ceiling fan controller of the present invention;

[0040] Figure 2 A circuit diagram of a ceiling fan controller of the present invention;

[0041] Figure 3 The present invention is a flow chart of a control method of a ceiling fan controller.

[0042] Reference numerals: gear switching circuit 01, ceiling fan control circuit 02, signal detection circuit 21, rectifier and filter circuit 22, MCU circuit 23, motor drive circuit 24.

[0043] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) 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.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In addition, in the present invention, descriptions such as "first", "second", etc. are only used 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 "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 present invention.

[0048] The present invention provides a ceiling fan controller, such as Figure 1As shown, it includes a gear switching circuit 01 and a ceiling fan control circuit 02, the input end of the gear switching circuit 01 is connected to the input end of the AC power supply end, and the output end of the gear switching circuit 01 is electrically connected to the input end of the ceiling fan control circuit 02;

[0049] The gear switching circuit 01 is used to convert the input AC power signal waveform into a power signal waveform corresponding to the switched gear when the gear switching is triggered by the user operation;

[0050] The ceiling fan control circuit 02 is used to identify the power signal waveform output by the gear switching circuit 01, and control the motor to run at a corresponding speed according to the power signal waveform.

[0051] More specifically, ceiling fans are classified into two categories: DC ceiling fans and AC ceiling fans.

[0052] DC ceiling fans have relatively low noise when running, especially at low gear, which can provide users with a quieter use environment; due to the high efficiency of DC motors, DC ceiling fans consume less electricity than AC ceiling fans at the same wind speed, which is more energy-saving and environmentally friendly; many DC ceiling fans are equipped with remote controls, and users can easily control the opening, closing and wind speed adjustment of the ceiling fans through the remote control, which is more convenient to operate. However, DC ceiling fans require special power interfaces and controllers, so the layout of the power cord and the location of the interface need to be considered during installation, which is relatively complicated; because DC ceiling fans use more complex control technology, their cost is relatively high, so their prices are also more expensive than AC ceiling fans.

[0053] AC ceiling fans are powered by AC power, which is less affected by voltage fluctuations, so they are more stable and reliable. AC ceiling fans are the most common type of ceiling fans on the market, and their manufacturing costs are relatively low, so their prices are more affordable. However, AC ceiling fans may produce loud noises during operation. Compared with DC ceiling fans, AC ceiling fans consume more electricity at the same wind speed, which is not energy-saving and environmentally friendly.

[0054] In summary, DC ceiling fans have the advantages of relatively low noise, more energy-saving and environmentally friendly, and easier operation than AC ceiling fans. However, some DC ceiling fans are not convenient to reinstall and rewire in existing power usage scenarios, or reinstalling and rewiring will incur high costs. In addition, the above-mentioned DC ceiling fans use more complex control technology, which is relatively expensive.

[0055] At present, the control methods used for DC ceiling fans include wireless transmitters, manual touch panel control, PWM speed control, etc., while remote control relies on wireless signal transmission, which may be interfered by other electronic devices, resulting in unstable signals or reception failures; long-term use or frequent operation of manual touch panel control may cause damage to the buttons, affecting the normal control of the ceiling fan and resulting in high subsequent maintenance costs; PWM speed control requires complex circuit design and debugging, increasing production costs and maintenance difficulties.

[0056] In order to solve the above problems, the present invention proposes a DC brushless ceiling fan speed controller that reduces maintenance costs and production costs and reduces user inconvenience. The controller includes a gear switching circuit 01 and a ceiling fan control circuit 02, the input end of the gear switching circuit 01 is connected to the input end of the AC power supply, and the output end of the gear switching circuit 01 is electrically connected to the input end of the ceiling fan control circuit 02.

[0057] The gear switching circuit 01 is used to convert the input AC power signal waveform into a power signal waveform corresponding to the switching gear when the gear switching is triggered by the user. The gear switching circuit 01 is arranged between the AC power supply end and the ceiling fan control circuit 02. By changing the power signal waveform, the ceiling fan control circuit 02 can control the speed of the motor according to the power signal of different waveforms. In order to adjust the power signal waveform under different gears, the gear switching circuit 01 uses electronic components such as diodes and switches to change the on-off state of the circuit or adjust the impedance of the circuit, so as to achieve precise control of the power signal. By accurately controlling the waveform and amplitude of the power signal, the circuit can realize the gear switching function set by the user and ensure the stable operation and efficient energy utilization of the ceiling fan under different gears. At the same time, different gears correspond to different power signal waveforms. When the user selects one of the gears, the gear switching circuit 01 converts the AC power signal waveform into the power signal waveform corresponding to the gear selected by the user.

[0058] The ceiling fan control circuit 02 is used to identify the power signal waveform output by the gear switching circuit 01, and control the motor to run at a corresponding speed according to the power signal waveform. The ceiling fan control circuit 02 needs to include a signal processing, power drive and motor control unit. First, the power signal waveform output by the gear switching circuit 01 is sent to the signal processing unit of the ceiling fan control circuit 02, and the signal processing unit decodes and filters the received signal to extract the information required to control the speed of the ceiling fan. Furthermore, according to the output of the signal processing unit, the power drive unit generates corresponding control signals, which are used to drive the electronic components in the motor control unit, thereby realizing accurate control of the motor speed. Finally, the motor control unit adjusts the input voltage or current of the motor according to the control signal of the power drive unit. By changing the input power of the motor, the ceiling fan control circuit 02 can control the speed of the motor so that it corresponds to the power signal waveform output by the gear switching circuit 01.

[0059] The present invention integrates the gear switching circuit 01 and the ceiling fan control circuit 02. The user can adjust the speed of the ceiling fan by a simple gear switching operation, thereby improving the convenience of use. The gear switching circuit 01 can be directly installed to replace the existing conventional wall control line without rewiring, thereby reducing the installation cost and time. The ceiling fan controller has a simple structure and relatively low maintenance cost. It does not require complex wireless communication modules, batteries and other components, and is not easily affected by external interference.

[0060] In one embodiment, the ceiling fan control circuit 02 includes a signal detection circuit 21, a rectifier and filter circuit 22, an MCU circuit 23 and a motor drive circuit 24; the input end of the signal detection circuit 21 and the input end of the rectifier and filter circuit 22 are electrically connected to the gear switching circuit 01, the output end of the signal detection circuit 21 is electrically connected to the MCU circuit 23, and the output end of the rectifier and filter circuit 22 is electrically connected to the MCU circuit 23 and the motor drive circuit 24.

[0061] The signal detection circuit 21 is used to detect the positive half-wave signal and the negative half-wave signal in the power signal output by the gear switching circuit 01, and output the corresponding positive / negative half-wave detection signal.

[0062] The signal detection circuit 21 generally includes a signal input terminal, a signal processing unit, and a signal output terminal. The working principle is as follows: the power signal output by the gear switching circuit 01 is sent to the signal input terminal of the signal detection circuit 21; the signal processing unit amplifies, filters, and compares the received signal. In this process, the circuit will identify the positive half-wave and negative half-wave parts in the signal; according to the result of the signal processing unit, the signal detection circuit 21 will output the corresponding positive / negative half-wave detection signal. These signals usually have a specific level or waveform so that the subsequent circuit can accurately identify and respond accordingly.

[0063] Here are some common implementations:

[0064] Comparison circuit based on operational amplifier: Use operational amplifier to build a comparison circuit to compare the input power signal with the set reference voltage. When the input signal is higher than the reference voltage, a positive half-wave detection signal is output; when the input signal is lower than the reference voltage, a negative half-wave detection signal is output.

[0065] Rectification circuit based on diode: The input AC signal is rectified by using the unidirectional conductivity of the diode. By selecting the appropriate diode and circuit parameters, the positive half-wave or negative half-wave rectification output can be achieved. Then, the subsequent comparison circuit or threshold detection circuit is used to identify and output the corresponding positive / negative half-wave detection signal.

[0066] Detection circuit based on microcontroller or digital signal processor: Utilize the powerful processing capability of microcontroller or digital signal processor to sample, analyze and process the input power signal. By writing corresponding program algorithms, accurate identification and detection of positive half-wave and negative half-wave can be achieved. Then, the detection results are output to subsequent circuits or devices in the form of digital signals.

[0067] The rectifier and filter circuit 22 is used to convert the power signal output by the gear switching circuit 01 into a DC power signal to supply power to the MCU circuit 23 and the motor drive circuit 24 .

[0068] The rectifier and filter circuit 22 mainly consists of two parts: a rectifier and a filter. The function of the rectifier is to convert the AC power signal into a pulsating DC power signal, while the filter is used to further smooth the pulsating DC signal to reduce the AC component (ie, ripple) therein, thereby obtaining a more stable DC power signal.

[0069] The ceiling fan motor usually requires a stable DC power supply to drive its operation. The rectifier filter circuit 22 can convert the AC power signal output by the gear switching circuit 01 into a stable DC power signal to meet the power supply requirements of the motor; the control circuit in the ceiling fan control system also requires a stable DC power supply, and the rectifier filter circuit 22 can provide the required DC power signal for these circuits.

[0070] The MCU circuit 23 is used to receive the positive / negative half-wave detection signal output by the signal detection circuit 21, and output the corresponding control signal to the motor drive circuit 24. The working process of the MCU circuit 23 is: receiving the positive / negative half-wave detection signal of the signal detection circuit 21, processing these signals to determine the target speed of the ceiling fan motor. Finally, outputting the control signal to the motor drive circuit 24 to adjust the speed of the motor.

[0071] The motor drive circuit 24 is used to control the motor speed of the ceiling fan according to the control signal output by the MCU circuit 23. The MCU circuit 23 transmits the control signal to the motor drive circuit 24 through a digital interface or an analog interface. After receiving these signals, the motor drive circuit 24 performs necessary processing and adjusts the input power of the motor to achieve precise control of the ceiling fan motor.

[0072] In one embodiment, the gear switching circuit 01 includes a gear switch and a waveform conversion circuit, one end of the gear switch is connected to the input end of the AC power supply, and the other end can be electrically connected to one of the multiple input ends of the waveform conversion circuit or the input end of the ceiling fan control circuit 02, and the output end of the waveform conversion circuit is electrically connected to the input end of the ceiling fan control circuit 02. By operating the gear switch, it is possible to control whether the AC power supply supplies power to the waveform conversion circuit, so as to control the waveform converted by the gear switching circuit 01.

[0073] The gear switch, when triggered by the user to switch the gear, the other end of the gear switch is electrically connected to a corresponding input end in the waveform conversion circuit; the gear switch has multiple contact points, each contact point is set on the multiple input ends of the waveform conversion circuit and the input end of the ceiling fan control circuit 02.

[0074] When one of the input terminals of the waveform conversion circuit or the input terminal contact point of the ceiling fan control circuit 02 is closed, the switch is in the on state, and current can flow between the contact points. At this time, the waveform of the AC power supply is converted into the power signal waveform corresponding to the circuit where the contact point is located.

[0075] When a corresponding input terminal in the waveform conversion circuit is connected, the waveform of the AC power signal connected is converted into a power signal waveform corresponding to the switching gear. The waveform of the AC power is a sine wave, and a half wave can be filtered out by a unidirectional conductive device such as a diode. In this embodiment, the waveform conversion circuit outputs power signals of different waveforms through the interaction of internal components.

[0076] In one embodiment, there are multiple waveform conversion circuits, the input end of each waveform conversion circuit is electrically connected to the gear switch, and the output end of each waveform conversion circuit is electrically connected to the ceiling fan control circuit 02. Through multiple waveform conversion circuits, power supply signals with different waveforms can be obtained. Multiple waveform conversion circuits are combined in parallel to achieve more complex waveform conversion and control. The above embodiment describes that the gear switch has multiple contact points, and each contact point is set on multiple input ends of the waveform conversion circuit and the input end of the ceiling fan control circuit 02. In this embodiment, there are multiple waveform conversion circuits, each waveform conversion circuit has an input end and an output end, and the contact point of the gear switch is set on the input end of multiple waveform conversion circuits. Each waveform conversion circuit has a different composition, and the waveform of the converted power supply signal is also different. When the gear switch and the contact point of a waveform conversion circuit are closed, the current can flow through the waveform conversion circuit, thereby outputting the waveform converted by the waveform conversion circuit.

[0077] Through multiple shape conversion circuits, the gear switching circuit 01 can convert the input AC power signal waveform into a power signal waveform corresponding to the switched gear when the user switches the gear.

[0078] In one embodiment, if Figure 2 As shown, the plurality of waveform conversion circuits include a first waveform conversion circuit, a second waveform conversion circuit, a third waveform conversion circuit and a fourth waveform conversion circuit;

[0079] The first waveform conversion circuit includes a first diode and a first resistor. The cathode of the first diode is electrically connected to the gear switch, the anode is electrically connected to the input end of the ceiling fan control circuit 02, and the two ends of the first resistor are electrically connected to the two ends of the first diode.

[0080] The AC power source passes through the first diode connected in series in reverse, and the first diode is connected in parallel with the first resistor. When the AC power source is in the positive half cycle, the first diode is turned on, and the current passes through the first diode. At this time, the waveform in the circuit is similar to the waveform of the positive half cycle of the input AC power source, but the amplitude may be slightly reduced due to the conduction voltage drop of the diode. When the AC power source is in the negative half cycle, the first diode is turned off, and the current passes through the first parallel resistor. Due to the existence of the first parallel resistor, the waveform in the circuit is no longer zero potential.

[0081] The second gear circuit includes a second diode and a second resistor, the anode of the second diode is electrically connected to the gear switch, the cathode is electrically connected to the input end of the ceiling fan control circuit 02, and the two ends of the second resistor are electrically connected to the two ends of the second diode;

[0082] The AC power supply is connected in series with the second diode in the forward direction, and the second diode is connected in parallel with the second resistor. When the AC power supply is in the positive half cycle, the second diode is cut off, and the current passes through the second resistor in parallel. Due to the existence of the second resistor in parallel, the waveform in the circuit is no longer zero potential. When the AC power supply is in the negative half cycle, the current passes through the second diode. At this time, the waveform in the circuit is similar to the waveform of the negative half cycle of the input AC power supply, but the amplitude may be slightly reduced due to the conduction voltage drop of the diode.

[0083] The third waveform conversion circuit includes a third diode, the cathode of the third diode is electrically connected to the gear switch, and the anode of the third diode is electrically connected to the input end of the ceiling fan control circuit 02;

[0084] The AC power supply is connected in series with the third diode in reverse. In the positive half cycle of the input power supply, the third diode is turned on, and the waveform of the circuit is similar to the waveform of the positive half cycle of the input power supply, but it may be slightly reduced due to the conduction voltage drop of the diode. In the negative half cycle of the input power supply, the third diode is cut off and does not conduct electricity, and the voltage will be zero or close to zero.

[0085] The fourth waveform conversion circuit includes a fourth diode, the anode of the fourth diode is electrically connected to the gear switch, and the cathode of the fourth diode is electrically connected to the input end of the ceiling fan control circuit 02.

[0086] The AC power is connected in series with the fourth diode in the forward direction. In the positive half cycle of the input power, the fourth diode is cut off and does not conduct electricity. The voltage is zero or close to zero. In the negative half cycle of the input power, the fourth diode is turned on. The waveform of the circuit is similar to the waveform of the positive half cycle of the input power, but may be slightly lower due to the conduction voltage drop of the diode.

[0087] At the same time, the states of the above-mentioned series-connected diodes can be any of the 1-4 gears; when the diode is not connected in series, that is, the gear switch is directly electrically connected to the input end of the ceiling fan control circuit 02, it is directly turned on to 5 gears, and the 5th gear has the maximum power.

[0088] The gear switching circuit 01 can be directly installed to replace the existing conventional wall control line without rewiring, reducing installation costs and installation time. The gear switching circuit 01 uses common conventional resistors and diode components, which have high reliability and low maintenance costs.

[0089] In one embodiment, the signal detection circuit 21 includes a negative half-wave detection circuit and a positive half-wave detection circuit connected in parallel, the negative half-wave detection circuit, the input end of the negative half-wave detection circuit and the input end of the positive half-wave detection circuit are electrically connected to the gear switching circuit 01, and the output end of the negative half-wave detection circuit and the output end of the positive half-wave detection circuit are electrically connected to the MCU circuit 23;

[0090] The negative half-wave detection circuit is used to detect the negative half-wave signal in the power signal output by the gear switching circuit 01, and output the corresponding negative half-wave detection signal; the negative half-wave detection circuit is used to detect the negative half-wave signal in the power signal output by the gear switching circuit 01, and output the corresponding negative half-wave detection signal. When the input signal is a negative half-wave, the circuit outputs a high level or a low level, and when the input signal is a positive half-wave, the circuit does not output or outputs a level opposite to the negative half-wave.

[0091] The positive half-wave detection circuit is used to detect the positive half-wave signal in the power signal output by the gear switching circuit 01, and output the corresponding positive half-wave detection signal. The negative half-wave detection circuit is used to detect the negative half-wave signal in the power signal output by the gear switching circuit 01, and output the corresponding negative half-wave detection signal. When the input signal is a negative half-wave, the circuit outputs a high level or a low level, and when the input signal is a positive half-wave, the circuit does not output or outputs a level opposite to the negative half-wave.

[0092] In one embodiment, if Figure 2 As shown, the AC power supply end includes a live wire and a neutral wire, the live wire is electrically connected to the ceiling fan control circuit 02 through the gear switching circuit 01, and the neutral wire is electrically connected to the ceiling fan control circuit 02;

[0093] The negative half-wave detection circuit includes a third resistor and a first optocoupler, the positive pole of the light-emitting end of the first optocoupler is electrically connected to the neutral line, the negative pole is electrically connected to the output end of the gear switching circuit 01 through the third resistor, and the receiving end of the first optocoupler is electrically connected to the MCU circuit 23; the first optocoupler is used to convert the negative half-wave signal in the power supply signal into an optical signal and then convert it into a negative half-wave output to the MCU circuit 23.

[0094] The light-emitting end of the first optocoupler is reversely connected in series with the live wire. When the input power is AC, its waveform contains positive half-wave and negative half-wave. The task of the negative half-wave detection circuit is to identify and process the negative half-wave signal. During the negative half-wave, the input voltage is lower than the zero potential. The third resistor divides this part of the voltage and limits the current, and then sends it to the input end of the first optocoupler. After the input end of the optocoupler receives the negative half-wave signal, the internal light-emitting diode emits light, and the transistor at the output end is turned on or off through light transmission, thereby outputting a negative half-wave detection signal corresponding to the input negative half-wave signal.

[0095] The positive half-wave detection circuit includes a fourth resistor and a second optocoupler. The positive electrode of the light-emitting end of the second optocoupler is electrically connected to the output end of the gear switching circuit 01 through the fourth resistor, and the negative electrode is electrically connected to the neutral line. The receiving end of the second optocoupler is electrically connected to the MCU circuit 23; the second optocoupler is used to convert the positive half-wave signal in the power supply signal into an optical signal and then convert it into a positive half-wave output to the MCU circuit 23.

[0096] The light-emitting end of the second optocoupler is connected in series with the live wire in the positive direction. When the input power is AC, its waveform contains positive half-wave and negative half-wave. The task of the positive half-wave detection circuit is to identify and process the positive half-wave signal. During the positive half-wave, the input voltage is lower than the zero potential. The fourth resistor divides this part of the voltage and limits the current, and then sends it to the input end of the second optocoupler. After the input end of the optocoupler receives the negative half-wave signal, the internal light-emitting diode emits light, and the transistor at the output end is turned on or off through light transmission, thereby outputting a positive half-wave detection signal corresponding to the input positive half-wave signal.

[0097] Through the waveform transformation of the front-end gear switching circuit 01, the waveforms of the two channels of the optocoupler output in the back-end fan control circuit will also change accordingly. After the two signals are sent to the IO port of the MCU, multiple input states can be distinguished, thereby executing multiple output gears and realizing multi-speed control.

[0098] In one embodiment, the rectifier and filter circuit 22 is provided with a first output power supply;

[0099] The receiving end of the first optical coupler and the receiving end of the second optical coupler respectively include a phototransistor, the first output power supply is electrically connected to the input end of the phototransistor through a resistor, and the output end of the phototransistor is electrically connected to the MCU circuit 23;

[0100] The phototransistor is used to receive the light signal emitted by the light-emitting end and convert it into an electrical signal. When light shines on the photosensitive area of ​​the phototransistor, the phototransistor can convert the received light signal into an electrical signal for output.

[0101] The present invention also provides a ceiling fan, including a ceiling fan body and a ceiling fan controller as described above. The user only needs to select different gears through a gear switch or knob on the wall to adjust the speed of the ceiling fan, thereby improving the convenience of use.

[0102] The present invention also provides a ceiling fan control method, the control method is based on the ceiling fan controller as described above, such as Figure 3 As shown, the control method includes the following steps:

[0103] S100: When the gear is switched by operation, the AC power waveform connected is converted into a power signal waveform corresponding to the switched gear.

[0104] When the user operates the gear switch to be electrically connected to the first waveform conversion circuit, a first waveform signal is obtained;

[0105] When the user operates the gear switch to be electrically connected to the second waveform conversion circuit, a second waveform signal is obtained;

[0106] When the user operates the gear switch to be electrically connected to the third waveform conversion circuit, a third waveform signal is obtained;

[0107] When the user operates the gear switch to be electrically connected to the fourth waveform conversion circuit, a fourth waveform signal is obtained;

[0108] When the user operates the gear switch to be electrically connected to the input end of the ceiling fan control circuit 02, a fifth waveform signal is obtained.

[0109] The easy operation of the gear switch allows users to easily select the desired ceiling fan gear. At the same time, the system ensures the comfort and performance consistency of the ceiling fan at different gears by providing a stable power signal waveform. This step can achieve the gear switching function set by the user by accurately controlling the waveform and amplitude of the power signal, and ensure the stable operation and efficient energy utilization of the ceiling fan at different gears.

[0110] S200: Identify the power signal waveform output by the power switching circuit, and control the motor to run at a corresponding speed according to the power signal waveform.

[0111] S210: Detect the positive half-wave signal and the negative half-wave signal in the power signal of the current waveform, and output the corresponding positive / negative half-wave detection signal. By detecting the positive half-wave signal and the negative half-wave signal in the power signal of the current waveform, the system can more accurately control the operation of the motor.

[0112] S220: Convert the current waveform power signal into a DC signal to supply power to the motor; convert the AC power signal into a DC signal to supply power to the motor, which not only simplifies the design of the motor control circuit, but also improves the operating efficiency and stability of the motor. In addition, DC power supply also helps reduce electromagnetic interference and noise.

[0113] S230: In response to the received positive / negative half-wave detection signal, output a corresponding control signal; and control the motor speed of the ceiling fan according to the received control signal.

[0114] The system outputs corresponding control signals according to the received positive / negative half-wave detection signals, which are used to adjust the speed of the motor. By accurately controlling the speed of the motor, the system can ensure stable operation and efficient energy utilization of the ceiling fan at different gears.

[0115] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A ceiling fan controller, characterized in that: It includes a gear switching circuit and a ceiling fan control circuit, wherein the input end of the gear switching circuit is connected to the input end of the AC power supply, and the output end of the gear switching circuit is electrically connected to the input end of the ceiling fan control circuit; The gear switching circuit is used to convert the input AC power signal waveform into a power signal waveform corresponding to the switched gear when the gear switching is triggered by a user operation; The ceiling fan control circuit is used to identify the power signal waveform output by the gear switching circuit, and control the motor to run at a corresponding speed according to the power signal waveform.

2. The ceiling fan controller according to claim 1, characterized in that: The ceiling fan control circuit includes a signal detection circuit, a rectifier filter circuit, an MCU circuit and a motor drive circuit; the input end of the signal detection circuit and the input end of the rectifier filter circuit are electrically connected to the gear switching circuit, the output end of the signal detection circuit is electrically connected to the MCU circuit, and the output end of the rectifier filter circuit is electrically connected to the MCU circuit and the motor drive circuit; The signal detection circuit is used to detect the positive half-wave signal and the negative half-wave signal in the power signal output by the gear switching circuit, and output the corresponding positive / negative half-wave detection signal; The rectifier and filter circuit is used to convert the power signal output by the gear switching circuit into a DC power signal to supply power to the MCU circuit and the motor drive circuit; The MCU circuit is used to receive the positive / negative half-wave detection signal output by the signal detection circuit, and output a corresponding control signal to the motor drive circuit; The motor driving circuit is used to control the motor speed of the ceiling fan according to the control signal output by the MCU circuit.

3. The ceiling fan controller according to claim 2, characterized in that: The gear switching circuit includes a gear switch and a waveform conversion circuit, one end of the gear switch is connected to the input end of the AC power supply, and the other end can be electrically connected to one of the multiple input ends of the waveform conversion circuit or the input end of the ceiling fan control circuit, and the output end of the waveform conversion circuit is electrically connected to the input end of the ceiling fan control circuit; When the gear switch is operated by a user to trigger the gear switching, the other end of the gear switch is electrically connected to a corresponding input end of the waveform conversion circuit; When a corresponding input terminal in the waveform conversion circuit is connected, the input AC power signal waveform is converted into a power signal waveform corresponding to the switching gear.

4. The ceiling fan controller according to claim 3, characterized in that: There are multiple waveform conversion circuits, and the input end of each waveform conversion circuit is electrically connected to the gear switch, and the output end of each waveform conversion circuit is electrically connected to the ceiling fan control circuit. The multiple waveform conversion circuits are used to change the waveform of the AC power supply to obtain power supply signals with different waveforms.

5. The ceiling fan controller according to claim 3, characterized in that: The plurality of waveform conversion circuits include a first waveform conversion circuit, a second waveform conversion circuit, a third waveform conversion circuit and a fourth waveform conversion circuit; The first waveform conversion circuit includes a first diode and a first resistor, the cathode of the first diode is electrically connected to the gear switch, the anode is electrically connected to the input end of the ceiling fan control circuit, and the two ends of the first resistor are electrically connected to the two ends of the first diode; The second gear circuit includes a second diode and a second resistor, the anode of the second diode is electrically connected to the gear switch, the cathode is electrically connected to the input end of the ceiling fan control circuit, and the two ends of the second resistor are electrically connected to the two ends of the second diode; The third waveform conversion circuit includes a third diode, the cathode of the third diode is electrically connected to the gear switch, and the anode is electrically connected to the input end of the ceiling fan control circuit; The fourth waveform conversion circuit includes a fourth diode, the anode of the fourth diode is electrically connected to the gear switch, and the cathode of the fourth diode is electrically connected to the input end of the ceiling fan control circuit.

6. The ceiling fan controller according to any one of claims 1 to 5, characterized in that: The signal detection circuit comprises a negative half-wave detection circuit and a positive half-wave detection circuit connected in parallel, wherein the input end of the negative half-wave detection circuit and the input end of the positive half-wave detection circuit are electrically connected to the gear switching circuit, and the output end of the negative half-wave detection circuit and the output end of the positive half-wave detection circuit are electrically connected to the MCU circuit; The negative half-wave detection circuit is used to detect the negative half-wave signal in the power signal output by the gear switching circuit, and output a corresponding negative half-wave detection signal; The positive half-wave detection circuit is used to detect the positive half-wave signal in the power supply signal output by the gear switching circuit, and output a corresponding positive half-wave detection signal.

7. The ceiling fan controller according to claim 6, characterized in that: The AC power supply end includes a live wire and a neutral wire, the live wire is electrically connected to the ceiling fan control circuit through the gear switching circuit, and the neutral wire is electrically connected to the ceiling fan control circuit; The negative half-wave detection circuit comprises a third resistor and a first optical coupler, the positive electrode of the light-emitting end of the first optical coupler is electrically connected to the neutral line, the negative electrode is electrically connected to the output end of the gear switching circuit through the third resistor, and the receiving end of the first optical coupler is electrically connected to the MCU circuit; The first optical coupler is used to convert the negative half-wave signal in the power supply signal into an optical signal and then convert it into a negative half-wave signal to output to the MCU circuit; The positive half-wave detection circuit includes a fourth resistor and a second optical coupler, the positive electrode of the light-emitting end of the second optical coupler is electrically connected to the output end of the gear switching circuit through the fourth resistor, the negative electrode is electrically connected to the neutral line, and the receiving end of the second optical coupler is electrically connected to the MCU circuit; The second optical coupler is used to convert the positive half-wave signal in the power supply signal into an optical signal and then convert it into a positive half-wave signal to output to the MCU circuit.

8. The ceiling fan controller according to claim 7, characterized in that: The rectifier and filter circuit is provided with a first output power supply; The receiving end of the first optical coupler and the receiving end of the second optical coupler respectively include a phototransistor, the first output power supply is electrically connected to the input end of the phototransistor through a resistor, and the output end of the phototransistor is electrically connected to the MCU circuit; The phototransistor is used to receive the light signal emitted by the light-emitting end and convert it into an electrical signal.

9. A ceiling fan, characterized in that: It comprises a ceiling fan body and a ceiling fan controller as claimed in any one of claims 1 to 8.

10. A ceiling fan control method, characterized in that: The control method is based on the ceiling fan controller according to any one of claims 1 to 8, and the control method comprises the following steps: When the gear is switched by an operation, the AC power waveform connected is converted into a power signal waveform corresponding to the switched gear; The power signal waveform output by the power switching circuit is identified, and the motor is controlled to run at a corresponding speed according to the power signal waveform.

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