Control circuit and multi-speed fan lamp circuit

Abstract

The invention discloses a control circuit and a multi-speed fan lamp circuit. The control circuit comprises a one-way controllable circuit, a two-way controllable circuit and an adjusting circuit. The one-way controllable circuit is connected with the mechanical switch and the load, the adjusting circuit is connected with the one-way controllable circuit and the two-way controllable circuit, and the two-way controllable circuit is further connected with the mechanical switch and the load. The one-way controllable circuit is used for transmitting the negative half-wave voltage of the alternating current power supply of the mechanical switch to a load; the bidirectional controllable circuit is used for transmitting the positive half-wave voltage and the negative half-wave voltage of the alternating current power supply of the mechanical switch to a load; and the adjusting circuit is used for controlling at least one of the one-way controllable circuit and the two-way controllable circuit to be switched off, and different gear control of the load is realized by adjusting the waveform of the alternating current power supply. By controlling the on and off of the unidirectional controllable circuit and the bidirectional controllable circuit, the waveform of the AC power supply is adjusted to realize the control of different gears of the load, the control circuit is connected in series with a live wire to take power, and no extra zero line is needed.

Description

Technical Field

[0001] The invention relates to the technical field of switch control, and in particular to a control circuit and a multi-speed fan lamp circuit. Background Art

[0002] There are many AC ceiling fan products in use on the market. As people's needs change, it is necessary to replace AC fan lights with more energy-saving DC fan lights. Most AC ceiling fan light products use wall controls connected in series to the live wire to adjust the fan speed and switch control, as well as lighting control. Some existing power usage scenarios are not convenient to reinstall the wiring, or reinstalling the wiring will incur a lot of expenses, so many existing DC fan lights use RF wireless signals to achieve fan control. Wireless transmitters are both handheld and wall-controlled. There are many ways to power wall-controlled wireless transmitters, including battery power supply and live and neutral line power supply, but they have the following defects: RF signals are easily interfered by other wireless signals of the same frequency; wall-controlled wireless transmitters have high production costs, and the maintenance cost is also high after the wall control is damaged; some also require regular battery replacement; handheld wireless transmitters are easy to lose. Summary of the invention

[0003] The main purpose of the present invention is to provide a control circuit and a multi-speed fan light circuit, aiming to solve the problems of co-frequency interference, battery replacement and high cost of existing wireless transmitter switches.

[0004] To achieve the above-mentioned purpose, the control circuit proposed in the present invention includes: a unidirectional controllable circuit, a bidirectional controllable circuit and a control circuit;

[0005] The unidirectional controllable circuit is connected to the mechanical switch and the load respectively, the control circuit is connected to the unidirectional controllable circuit and the bidirectional controllable circuit, and the bidirectional controllable circuit is also connected to the mechanical switch and the load;

[0006] The unidirectional controllable circuit is used to transmit the negative half-wave voltage of the AC power supply of the mechanical switch to the load;

[0007] The bidirectional controllable circuit is used to transmit the positive half-wave and negative half-wave voltages of the AC power supply of the mechanical switch to the load;

[0008] The regulating circuit is used to control at least one of the unidirectional controllable circuit and the bidirectional controllable circuit to be disconnected, and different gear control of the load is achieved by adjusting the waveform of the AC power supply.

[0009] In one embodiment, the control circuit includes: a single chip microcomputer and a switch input circuit;

[0010] The single chip microcomputer is connected to the regulating circuit, and the switch input circuit is connected to the single chip microcomputer;

[0011] The switch input circuit is used to receive the gear position control of the user;

[0012] The single chip microcomputer is used to generate and send a stop signal to the regulating circuit according to the gear control;

[0013] The regulating circuit is used to control the bidirectional controllable circuit to disconnect when receiving the stop signal.

[0014] In one embodiment, the control circuit includes: a power supply circuit;

[0015] The power supply circuit is connected to the single chip microcomputer and the unidirectional controllable circuit;

[0016] The power supply circuit converts the AC power transmitted by the mechanical switch into a DC voltage to supply power to the single chip microcomputer.

[0017] In one embodiment, the control circuit includes: a rectifier and filter circuit; the rectifier and filter circuit are respectively connected to the unidirectional controllable circuit, the bidirectional controllable circuit and the load;

[0018] The rectifier and filter circuit is used to convert the AC power output by the unidirectional controllable circuit and the bidirectional controllable circuit into a DC power supply, and provide the DC power supply to the load at the rear end.

[0019] In one embodiment, the control circuit includes: a detection circuit and a drive circuit;

[0020] The driving circuit is connected to the load and the rectifying and filtering circuit respectively, and the detecting circuit is connected to the unidirectional controllable circuit, the bidirectional controllable circuit and the load respectively;

[0021] A detection circuit, used for detecting a control signal from the AC power source controlled by the regulating circuit, and transmitting the control signal to the driving circuit;

[0022] The driving circuit is used to drive the load according to the control signal to achieve different working states of the load.

[0023] In one embodiment, the unidirectional controllable circuit includes: a first resistor, a first capacitor, a first voltage stabilizing diode, a fourth diode and a unidirectional thyristor;

[0024] One end of the first resistor is connected to the mechanical switch and the cathode of the unidirectional thyristor, the other end of the first resistor is connected to the first capacitor, the control electrode of the unidirectional thyristor and the anode of the first voltage-regulating diode, the other end of the first capacitor is grounded, the cathode of the first voltage-regulating diode is respectively connected to the anode of the unidirectional thyristor, the cathode of the fourth diode and the power supply circuit, and the anode of the fourth diode is connected to the load.

[0025] In one embodiment, the power supply module includes: a second diode, a second polarized capacitor and a third capacitor;

[0026] The anode of the second diode is connected to the cathode of the first voltage regulator diode, the anode of the unidirectional thyristor and the cathode of the fourth diode, the cathode of the second diode is connected to the anode of the second polarized capacitor, one end of the third capacitor and the load, and the cathode of the second polarized capacitor and the other end of the third capacitor are grounded.

[0027] In one embodiment, the bidirectional controllable circuit includes: a second resistor, a fifth diode, a bidirectional thyristor and a third resistor;

[0028] One end of the second resistor is connected to the mechanical switch and the main electrode one of the bidirectional thyristor, the other end of the second resistor is connected to the anode of the fifth resistor and the main electrode two of the bidirectional thyristor, the cathode of the fifth diode is connected to the load and the anode of the fourth diode, the control electrode of the bidirectional thyristor is connected to one end of the third resistor and the regulating circuit, and the other end of the third resistor is connected to the single-chip microcomputer.

[0029] In one embodiment, the regulating circuit includes: a third diode, a first triode and a fourth resistor;

[0030] The cathode of the third diode is connected to one end of the third resistor, the collector of the first transistor and the control electrode of the bidirectional thyristor, the base of the first transistor is connected to one end of the fourth resistor, the other end of the fourth resistor is connected to the single-chip microcomputer, and the anode of the fourth diode and the emitter of the first transistor are grounded.

[0031] The present invention also provides a multi-speed fan light circuit, which includes the control circuit as described above.

[0032] The present invention discloses a control circuit and a multi-speed fan light circuit, wherein the control circuit comprises: a unidirectional controllable circuit, a bidirectional controllable circuit and a regulating circuit; the unidirectional controllable circuit is respectively connected to a mechanical switch and a load, the regulating circuit is connected to the unidirectional controllable circuit and the bidirectional controllable circuit, and the bidirectional controllable circuit is also connected to the mechanical switch and the load; the unidirectional controllable circuit is used to transmit the negative half-wave voltage of the AC power supply of the mechanical switch to the load; the bidirectional controllable circuit is used to transmit the positive half-wave voltage of the AC power supply of the mechanical switch to the load; the regulating circuit is used to control at least one of the unidirectional controllable circuit and the bidirectional controllable circuit to be disconnected, and different gear control of the load is achieved by adjusting the waveform of the AC power supply. By controlling the conduction and cutoff of the unidirectional controllable circuit and the bidirectional controllable circuit, and adjusting the waveform of the AC power supply, different gear control of the load is achieved, and the control circuit is connected in series to the live wire to take power, and no additional neutral wire is required for the control circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] 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.

[0034] Figure 1 A schematic structural diagram of a first embodiment of a control circuit provided by the present invention;

[0035] Figure 2 A schematic structural diagram of a second embodiment of a control circuit provided by the present invention;

[0036] Figure 3 A circuit diagram of a second embodiment of a control circuit provided by the present invention;

[0037] Figure 4 This is a schematic structural diagram of a third embodiment of the control circuit provided by the present invention.

[0038] Description of Figure Numbers:

[0039]

[0040]

[0041] 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

[0042] 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.

[0043] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "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 technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0045] There are many AC ceiling fan products in use on the market. As people's needs change, it is necessary to replace AC fan lights with more energy-saving DC fan lights. Most AC ceiling fan light products use wall controls connected in series to the live wire to adjust the fan speed and switch control, as well as lighting control. Some existing power usage scenarios are not convenient to reinstall the wiring, or reinstalling the wiring will incur a lot of expenses, so many existing DC fan lights use RF wireless signals to achieve fan control. Wireless transmitters are both handheld and wall-controlled. There are many ways to power wall-controlled wireless transmitters, including battery power supply and live and neutral line power supply, but they have the following defects: RF signals are easily interfered by other wireless signals of the same frequency; wall-controlled wireless transmitters have high production costs, and the maintenance cost is also high after the wall control is damaged; some also require regular battery replacement; handheld wireless transmitters are easy to lose.

[0046] like Figure 1As shown, the present invention discloses a control circuit and a multi-speed fan light circuit, the control circuit comprising: a unidirectional controllable circuit 200, a bidirectional controllable circuit 300 and a regulating circuit 100; the unidirectional controllable circuit is respectively connected to a mechanical switch 500 and a load 400, the regulating circuit is connected to the unidirectional controllable circuit and the bidirectional controllable circuit, and the bidirectional controllable circuit is also connected to the mechanical switch and the load; the unidirectional controllable circuit 200 is used to transmit the negative half-wave voltage of the AC power supply 600 of the mechanical switch to the load; the bidirectional controllable circuit 300 is used to transmit the positive half-wave and negative half-wave voltages of the AC power supply of the mechanical switch to the load; the regulating circuit 100 is used to control at least one of the unidirectional controllable circuit and the bidirectional controllable circuit to be disconnected, and different gear control of the load is achieved by adjusting the waveform of the AC power supply. By controlling the on and off of the unidirectional controllable circuit and the bidirectional controllable circuit and adjusting the waveform of the AC power supply 600, different gear control of the load is achieved. The control circuit is connected in series to the live wire to draw power, and there is no need to provide an additional neutral wire for the control circuit.

[0047] It should be noted that the load can be a DC fan lamp product. The present invention does not require rewiring and can directly replace components on the original AC wall-controlled fan lamp control circuit, thereby replacing the AC ceiling fan with a more energy-saving DC fan lamp product, which can not only achieve multi-speed fan control, but also control the lighting lamp.

[0048] It is understandable that this application can meet the requirements of fan multi-speed control and lighting control. The control circuit is directly connected in series to the input live wire of the original wall control switch for control. This application can directly install and replace the conventional wall control line without rewiring, reducing installation costs and installation time. Compared with RF wireless products, the product has low production costs, stable performance, no regular maintenance such as battery replacement, and no problem of losing the remote control and being unable to control.

[0049] Specifically, after the mechanical switch is turned on, the control circuit directly controls the unidirectional thyristor to remain turned on, and transmits the negative half-wave voltage of the AC power supply to the load through the unidirectional thyristor. At the same time, after the unidirectional thyristor is turned on, the voltage difference between the input and output ends of the thyristor is used to obtain power to provide power for the control and regulation circuit. After receiving the control input signal of the control switch, the regulation circuit controls the on and off of the bidirectional thyristor to change the waveform of the output AC power supply to achieve different gears or other controls.

[0050] Optionally, in addition to controlling the fan position, the LED light can also be controlled. After the mechanical switch of the unidirectional thyristor is turned on, the control circuit will control the unidirectional thyristor to be turned on all the time. At the same time, the voltage drop across the input and output of the unidirectional thyristor is used to obtain power to supply the control and regulation circuit. The bidirectional thyristor is also turned on all the time when it does not send a control signal. When the MCU in the control and regulation circuit receives the switching value on the wall switch, the control and regulation circuit will control the bidirectional thyristor to disconnect and conduct; when different switching values ​​are received, different numbers of disconnections and conductions are performed to achieve different control signal transmissions.

[0051] In this embodiment, the unidirectional controllable circuit, the bidirectional controllable circuit and the regulating circuit are connected in series to the mechanical switch of the original wall-controlled switch, and the mechanical switch is connected in series to the live wire to assemble into a new wall-controlled switch. The new wall-controlled switch can adjust multiple gears without rewiring. The regulating circuit 100 of the wall-controlled switch controls the conduction and cutoff of the unidirectional controllable circuit 200 and / or the bidirectional controllable circuit 300 to adjust the gear and lighting mode of the fan, wherein the unidirectional controllable circuit 200 is used to transmit the negative half-wave voltage of the AC power supply of the mechanical switch to the load, and the bidirectional controllable circuit 300 is used to transmit the positive half-wave and negative half-wave voltages of the AC power supply of the mechanical switch to the load. The load is a DC fan light product, and the control circuit also includes a rectifier filter circuit that converts the AC power supply into DC power, a detection circuit 700 that detects a control signal from the AC power supply output by the regulating circuit 100, and a drive circuit 800 that drives the load according to the control signal.

[0052] like Figure 2 and Figure 3 As shown, Figure 2 A schematic diagram of the structure of a second embodiment of a control circuit provided by the present invention, Figure 3 This is a circuit diagram of a second embodiment of a control circuit provided by the present invention.

[0053] Based on the above first embodiment, a second embodiment of the control circuit of the present invention is proposed.

[0054] It can be understood that, in this embodiment, the regulating circuit 100 controls the bidirectional controllable circuit 300 to be turned on and off to adjust the gear position and lighting mode of the fan, and the unidirectional controllable circuit is always turned on.

[0055] It should be noted that if Figure 2As shown, the Wall Switch is a wall-controlled switch, including a mechanical switch, a unidirectional controllable circuit, a bidirectional controllable circuit, and an adjustment circuit. There is alternating current between AC IN L and AC IN N, AC IN L is the live wire of the power supply, AC IN L is connected to the mechanical switch, and the output end of the wall-controlled switch is AC OUT L. The wall-controlled switch has an adjustment gear, and includes Figure 3 The circuit shown.

[0056] The unidirectional controllable circuit includes: a first resistor R1, a first capacitor C1, a first voltage-stabilizing diode D1, a fourth diode D4 and a unidirectional thyristor SCR1; one end of the first resistor is connected to the mechanical switch K1 and the cathode of the unidirectional thyristor, the other end of the first resistor is connected to the first capacitor, the control electrode of the unidirectional thyristor and the anode of the first voltage-stabilizing diode, the other end of the first capacitor is grounded, the cathode of the first voltage-stabilizing diode is respectively connected to the anode of the unidirectional thyristor, the cathode of the fourth diode and the power supply circuit, and the anode of the fourth diode is connected to the load.

[0057] It can be understood that the unidirectional thyristor SCR1 has three electrodes: cathode, anode and control electrode. The unidirectional thyristor only allows current to flow in one direction, from the anode to the cathode, and the control electrode of the unidirectional thyristor can control the on and off of the current. When a forward voltage is applied between the anode and the cathode, and a positive voltage is applied to the control electrode, the unidirectional thyristor will be turned on. Once turned on, even if the trigger current is removed, as long as the forward voltage is maintained between the anode and the cathode, the thyristor will remain in the on state. The thyristor will not turn off until the current decreases below the holding current or a reverse voltage is applied.

[0058] It should be noted that AC IN L is a sinusoidal alternating current. After the power supply at the input end of AC IN L is turned on through the mechanical switch K1, it is connected to the load circuit through the unidirectional thyristor SCR1. When the voltage of AC IN L is a positive half-wave, the control electrode voltage of the unidirectional thyristor is a positive voltage. The unidirectional thyristor SCR1 is an ordinary diode, and its cathode is connected to a positive voltage and cannot be turned on. AC INL charges the first capacitor, and the unidirectional controllable circuit is turned off; when the voltage of AC IN L is a negative half-wave, the first voltage regulator diode D1 and the first capacitor C1 are discharged, so that the control electrode voltage of the unidirectional thyristor is a positive voltage. The unidirectional thyristor SCR1 is an ordinary diode, and its cathode is connected to a negative voltage. The unidirectional thyristor SCR1 and the fourth diode D4 are turned on, and the negative half-wave voltage of the AC power supply of the mechanical switch is transmitted to the load.

[0059] The bidirectional controllable circuit includes: a second resistor R2, a fifth diode D5, a bidirectional thyristor SCR2 and a third resistor R3; one end of the second resistor R2 is connected to the mechanical switch and the main electrode one of the bidirectional thyristor, the other end of the second resistor R2 is connected to the anode of the fifth resistor and the main electrode two of the bidirectional thyristor, the cathode of the fifth diode D5 is connected to the load and the anode of the fourth diode, the control electrode of the bidirectional thyristor is connected to one end of the third resistor R3 and the regulating circuit, and the other end of the third resistor is connected to the single-chip microcomputer.

[0060] It can be understood that the bidirectional thyristor SCR2 has two anodes, two cathodes, and a control electrode. The bidirectional thyristor can be turned on and off in both positive and negative directions. By applying a positive voltage to the control electrode, the conduction of the bidirectional thyristor can be controlled, and by applying a negative voltage to the control electrode, the turn-off of the bidirectional thyristor can be controlled.

[0061] It should be noted that when the regulation circuit outputs a high voltage to the control electrode of the biphase thyristor SCR2, when the voltage of AC IN L is a positive half-wave, the control electrode voltage of the biphase thyristor SCR2 connected to the regulation circuit is a high voltage, the biphase thyristor SCR2 is bidirectionally conductive, and the fifth diode D5 is also turned on, transmitting the positive half-wave voltage of the AC power supply of the mechanical switch K1 to the load; when the voltage of AC IN L is a negative half-wave, the regulation circuit is a high voltage, the biphase thyristor is bidirectionally conductive, the fifth diode D5 is cut off, and the bidirectional controllable circuit is turned off.

[0062] Specifically, when the regulating circuit outputs a low voltage to the control electrode of the bidirectional thyristor, the bidirectional thyristor is cut off, and the bidirectional controllable circuit is continuously turned off. The second resistor has a relatively large resistance value and is used to protect the bidirectional thyristor.

[0063] The regulating circuit includes: a third diode D3, a first transistor Q1 and a fourth resistor R4; the cathode of the third diode D3 is connected to one end of the third resistor, the collector of the first transistor and the control electrode of the bidirectional thyristor, the base of the first transistor is connected to one end of the fourth resistor, the other end of the fourth resistor is connected to the single-chip microcomputer, and the anode of the fourth diode and the emitter of the first transistor are grounded.

[0064] It should be noted that BL1 is connected to the single-chip microcomputer. When BL1 is connected to a high level, the transistor Q1 is turned on, so that the control electrode voltage of the bidirectional thyristor SCR2 is pulled down, and the bidirectional thyristor SCR2 is turned off. When the bidirectional thyristor SCR2 is turned off, the bidirectional controllable circuit is disconnected. When BL1 is connected to a low level, the transistor Q1 is turned off, so that the control electrode voltage of the bidirectional thyristor SCR2 is pulled up by VSS, and the bidirectional thyristor SCR2 is turned on. When the bidirectional thyristor SCR2 is turned on, the positive half-wave waveform of the power supply at the AC OUT L output end will be transmitted to the load.

[0065] The control circuit includes: a single-chip microcomputer and a switch input circuit; the single-chip microcomputer is connected to the regulating circuit, and the switch input circuit is connected to the single-chip microcomputer; the switch input circuit is used to receive the gear control of the user; the single-chip microcomputer is used to generate and send a stop signal to the regulating circuit according to the gear control; the regulating circuit is used to control the bidirectional controllable circuit to disconnect when receiving the stop signal.

[0066] It should be noted that the single chip microcomputer can be set to receive different gear control outputs different BL1 high-level control signal combinations, thereby implementing different control commands, causing the waveform of the positive half-wave of the AC OUT L output power supply to change. The control circuit also includes an LED display for displaying whether the wall control switch is in working condition.

[0067] It can be understood that the single chip microcomputer can be an MCU or an FPGA, which is used to generate and send a stop signal to the regulating circuit according to the gear control. When the gear control of the switch input circuit is the highest, BL1 continues to be a low level. When the gear control of the switch input circuit is the lowest, BL1 continues to be a high level. When the gear control of the switch input circuit is the middle gear, the time for BL1 to output high and low levels is controlled.

[0068] The control circuit includes: a power supply circuit; the power supply circuit is connected to the single-chip microcomputer and the unidirectional controllable circuit; the power supply circuit converts the AC power transmitted by the mechanical switch into a DC voltage to power the single-chip microcomputer.

[0069] It should be noted that the wall-controlled switch of the control circuit only needs to be connected in series to the original power live wire for control, but the microcontroller requires DC power supply, so the power supply circuit converts the AC power of the mechanical switch into stable DC power to power the microcontroller and the switch input circuit.

[0070] The power supply module includes: a second diode D2, a second polarized capacitor C2 and a third capacitor C3; the anode of the second diode D2 is connected to the cathode of the first voltage stabilizing diode D1, the anode of the unidirectional thyristor SCR1 and the cathode of the fourth diode, the cathode of the second diode is connected to the anode of the second polarized capacitor, one end of the third capacitor and the load, and the cathode of the second polarized capacitor and the other end of the third capacitor are grounded.

[0071] It can be understood that the voltage difference between the anode and cathode of the unidirectional thyristor SCR1 is used to collect the voltage, and the first voltage stabilizing diode D1, the second diode D2, the second polarized capacitor C2, and the third capacitor C3 are used to obtain VSS to provide power for the single-chip computer. The first voltage stabilizing diode D1 is used to output a constant voltage, and the second polarized capacitor C2 is used to store charge, smooth the DC voltage, filter, and provide instantaneous large current.

[0072] In this embodiment, the unidirectional thyristor is always turned on, and the voltage difference between the anode and cathode of the unidirectional thyristor is used to realize the series power supply of the wall-controlled switch. There is no need to provide an additional neutral line for the wall-controlled switch. The regulating circuit controls the conduction and cutoff of the bidirectional thyristor to change the output power waveform to achieve different gear control of the load. The wall-controlled switch is only connected in series to the live wire of the system power supply, so as to realize the gear control of the fan motor and the LED lighting at the same time, which simplifies the installation and wiring requirements, is better applicable to the existing installation lines, and greatly reduces the installation cost.

[0073] like Figure 4 As shown, Figure 4 This is a schematic structural diagram of a third embodiment of the control circuit provided by the present invention.

[0074] Based on the above first embodiment and / or second embodiment, a third embodiment of the control circuit of the present invention is proposed.

[0075] The control circuit includes: a rectifier and filter circuit; the rectifier and filter circuit is respectively connected to the unidirectional controllable circuit, the bidirectional controllable circuit and the load; the rectifier and filter circuit is used to convert the AC power output by the unidirectional controllable circuit and the bidirectional controllable circuit into a DC power supply, and provide DC power to the load at the rear end.

[0076] It should be noted that the rectifier and filter circuit in the detection drive circuit rectifies and filters the AC power provided by the unidirectional thyristor and the bidirectional thyristor into a DC power supply, and provides a DC power supply for the back-end control circuit and the drive circuit.

[0077] like Figure 4 As shown, the load end also includes zero-crossing detection, detection circuit, rectification and filtering circuit, drive circuit, DC brushless motor and LED.

[0078] The control circuit includes: a detection circuit 700 and a drive circuit 800; the drive circuit 800 is respectively connected to the load 400 and the rectifier and filter circuit, and the detection circuit is respectively connected to the unidirectional controllable circuit, the bidirectional controllable circuit and the load; the detection circuit is used to detect a control signal from the AC power supply controlled by the regulating circuit and transmit it to the drive circuit; the drive circuit is used to drive the load according to the control signal to achieve different working states of the load.

[0079] It can be understood that the zero-crossing detection circuit can be used to achieve precise phase control of the wall-controlled output power supply to ensure stable operation of the load. The rectifier and filter circuit is used to convert the AC power output by the wall-controlled switch into DC power and provide it to the drive circuit. The drive circuit is used to drive and control the DC brushless motor and LED load.

[0080] Specifically, the driving circuit also includes an MCU controller, and the rectifying and filtering circuit also includes a voltage stabilizing circuit. The rectifying and filtering circuit converts AC power into DC power, and removes the AC component through the filtering circuit to make the output voltage as stable as possible. The voltage stabilizing circuit can automatically adjust the output voltage according to the change of the input voltage to keep the output voltage stable. The detection circuit detects a control signal from the AC power supply controlled by the regulating circuit 100, and provides it to the MCU in the detection driving circuit. The MCU then controls the driving motor and the LED lamp load to achieve different working states.

[0081] It should be noted that the full name of the detection circuit is the AC input power positive half-wave signal detection circuit, which is used to detect the positive half-wave output waveform of the bidirectional controllable circuit, detect the positive half-wave signal changes of the wall-controlled switch power supply output power supply through the optocoupler circuit, detect the control signal from the AC power supply output by the regulation circuit, and transmit it to the MCU of the drive circuit. The drive circuit receives different control commands and realizes different functions.

[0082] In this embodiment, the control circuit includes a wall-controlled switch, a detection circuit, a rectifier and filter circuit, a drive circuit and a DC brushless motor LED. The present application converts AC power into DC power and provides it to a DC load, while providing different gear controls through the wall-controlled switch.

[0083] The present invention also proposes a multi-speed fan light circuit, which includes a control circuit. The specific structure of the control circuit refers to the above-mentioned embodiment. Since the multi-speed fan light circuit adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0084] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A control circuit, characterized in that: The control circuit includes: a unidirectional controllable circuit, a bidirectional controllable circuit and a regulating circuit; The unidirectional controllable circuit is connected to the mechanical switch and the load respectively, the regulating circuit is connected to the unidirectional controllable circuit and the bidirectional controllable circuit, and the bidirectional controllable circuit is also connected to the mechanical switch and the load; The unidirectional controllable circuit is used to transmit the negative half-wave voltage of the AC power supply of the mechanical switch to the load; The bidirectional controllable circuit is used to transmit the positive half-wave and negative half-wave voltages of the AC power supply of the mechanical switch to the load; The regulating circuit is used to control at least one of the unidirectional controllable circuit and the bidirectional controllable circuit to be disconnected, and different gear control of the load is achieved by adjusting the waveform of the AC power supply.

2. The control circuit according to claim 1, characterized in that: The control circuit comprises: a single chip microcomputer and a switch input circuit; The single chip microcomputer is connected to the regulating circuit, and the switch input circuit is connected to the single chip microcomputer; The switch input circuit is used to receive the user's gear control; The single chip microcomputer is used to generate and send a stop signal to the regulating circuit according to the gear control; The regulating circuit is used to control the bidirectional controllable circuit to disconnect when receiving the stop signal.

3. The control circuit according to claim 2, characterized in that: The control circuit comprises: a power supply circuit; The power supply circuit is connected to the single chip microcomputer and the unidirectional controllable circuit; The power supply circuit converts the AC power transmitted by the mechanical switch into a DC voltage to supply power to the single chip microcomputer.

4. The control circuit according to claim 3, characterized in that: The control circuit includes: a rectifier and filter circuit; The rectification and filtering circuit is respectively connected to the unidirectional controllable circuit, the bidirectional controllable circuit and the load; The rectifier and filter circuit is used to convert the AC power output by the unidirectional controllable circuit and the bidirectional controllable circuit into a DC power supply, and provide the DC power supply to the load at the rear end.

5. The control circuit according to claim 4, characterized in that: The control circuit comprises: a detection circuit and a driving circuit; The driving circuit is connected to the load and the rectifying and filtering circuit respectively, and the detecting circuit is connected to the unidirectional controllable circuit, the bidirectional controllable circuit and the load respectively; A detection circuit, used for detecting a control signal from the AC power source controlled by the regulating circuit, and transmitting the control signal to the driving circuit; The driving circuit is used to drive the load according to the control signal to achieve different working states of the load.

6. The control circuit according to claim 3, characterized in that: The unidirectional controllable circuit comprises: a first resistor, a first capacitor, a first voltage-stabilizing diode, a fourth diode and a unidirectional thyristor; One end of the first resistor is connected to the mechanical switch and the cathode of the unidirectional thyristor, the other end of the first resistor is connected to the first capacitor, the control electrode of the unidirectional thyristor and the anode of the first voltage-regulating diode, the other end of the first capacitor is grounded, the cathode of the first voltage-regulating diode is respectively connected to the anode of the unidirectional thyristor, the cathode of the fourth diode and the power supply circuit, and the anode of the fourth diode is connected to the load.

7. The control circuit according to claim 6, characterized in that: The power supply module includes: a second diode, a second polarized capacitor and a third capacitor; The anode of the second diode is connected to the cathode of the first voltage regulator diode, the anode of the unidirectional thyristor and the cathode of the fourth diode, the cathode of the second diode is connected to the anode of the second polarized capacitor, one end of the third capacitor and the load, and the cathode of the second polarized capacitor and the other end of the third capacitor are grounded.

8. The control circuit according to claim 7, characterized in that: The bidirectional controllable circuit comprises: a second resistor, a fifth diode, a bidirectional thyristor and a third resistor; One end of the second resistor is connected to the mechanical switch and the main electrode one of the bidirectional thyristor, the other end of the second resistor is connected to the anode of the fifth resistor and the main electrode two of the bidirectional thyristor, the cathode of the fifth diode is connected to the load and the anode of the fourth diode, the control electrode of the bidirectional thyristor is connected to one end of the third resistor and the regulating circuit, and the other end of the third resistor is connected to the single-chip microcomputer.

9. The control circuit according to claim 8, characterized in that: The regulating circuit comprises: a third diode, a first triode and a fourth resistor; The cathode of the third diode is connected to one end of the third resistor, the collector of the first transistor and the control electrode of the bidirectional thyristor, the base of the first transistor is connected to one end of the fourth resistor, the other end of the fourth resistor is connected to the single-chip microcomputer, and the anode of the fourth diode and the emitter of the first transistor are grounded.

10. A multi-speed fan light circuit, characterized in that: The multi-speed fan light circuit comprises a control circuit as claimed in any one of claims 1 to 9.

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