Control circuits and equipment control systems

Abstract

The present application provides a control circuit and a device control system. The control circuit includes: a signal generating module and a signal processing module; the signal generating module includes a plurality of switch units connected in parallel, the first end of each switch unit is connected to the live wire or the neutral wire of the mains, and the second end of each switch unit is connected to the first end of the signal processing module; the signal generating module is used to generate a first control signal based on the switch state of each switch unit; the signal processing module is used to receive the first control signal from the signal generating module, and output a target control signal for controlling the corresponding target electrical device based on the first control signal. It is possible to control multiple electrical devices and achieve a more convenient control circuit wiring effect without increasing the cost.

Description

Technical Field

[0001] The present application belongs to the field of control technology, and specifically, relates to a control circuit and a device control system. Background Art

[0002] Existing dimming technologies usually include thyristor dimming, 0-10V dimming, DALI dimming control system, wireless dimming system, etc. Among them, thyristor dimming, 0-10V dimming, etc. can dim multiple lights at the same time, but due to the power of each dimmer, the number of lights it controls is usually only a few to a dozen, and the cost of the dimmer is relatively high. The DALI dimming control system can address and dim each light, but the entire system is expensive. Due to environmental reasons, the wireless dimming system is prone to mis-dimming during the dimming process, and the entire system debugging is complex and costly.

[0003] Therefore, existing dimming technologies usually have problems such as complex control circuit wiring or high implementation costs. Summary of the invention

[0004] In view of this, the purpose of the embodiments of the present application is to provide a control circuit and a device control system to solve the problems of complex control circuit wiring and high implementation cost in the prior art.

[0005] In a first aspect, an embodiment of the present application provides a control circuit, characterized in that the control circuit comprises: a signal generating module, a signal processing module;

[0006] The signal generating module comprises a plurality of switch units connected in parallel, a first end of each of the switch units is connected to a live wire or a neutral wire of the mains, and a second end of each of the switch units is connected to an input end of the signal processing module;

[0007] The signal generating module is used to generate a first control signal based on the switch state of each of the switch units;

[0008] The signal processing module is used to receive the first control signal from the signal generating module, and output a target control signal for controlling a corresponding target electrical device based on the first control signal.

[0009] In the above implementation process, the first end of each switch unit is connected to the live wire or neutral wire of the mains, and the signal generation module generates a first control signal based on the switch state of each switch unit, and transmits the first control signal to the signal processing module, so that the signal processing module processes each received first control signal and outputs a target control signal for controlling the corresponding target electrical device. Thus, the control of multiple electrical devices can be achieved, and since the signal generation module can be arbitrarily connected from the live wire or neutral wire, it can achieve the effect of more convenient control circuit wiring without increasing the cost.

[0010] Optionally, the switch unit includes: at least one switch device; the switch device includes: any one of a mechanical switch, a relay, and a MOS tube.

[0011] In the above implementation process, each switch unit includes at least one switch device, and the switch device includes: any one of a mechanical switch, a relay, and a MOS tube.

[0012] In the above implementation process, each switch unit includes at least one switch device, and the switch state of the switch unit can be controlled by turning on or off the at least one switch device.

[0013] Optionally, the signal processing module includes: a rectifier unit and a plurality of isolation units, wherein the rectifier unit and the plurality of isolation units are connected via a ground line;

[0014] The first end of the rectifier unit is connected to the ground wire, the second end and the third end of the rectifier unit are respectively connected to the live wire and the neutral wire of the mains, the fourth end of the rectifier unit serves as a voltage output end, and the rectifier unit is used to rectify the received mains power and output a first voltage through the fourth end of the rectifier unit;

[0015] The first end of each isolation unit is connected to the ground wire, the second end of the isolation unit is connected to the second voltage, the third end of the isolation unit is connected to the signal generating module as an input end of the signal processing module, and the fourth end of the isolation unit is used as a signal output end of the signal processing module, which is used to isolate the first control signal received from the signal generating module to obtain the second control signal, and output the second control signal as the target control signal through the third end of the isolation unit, so as to control the power state and / or power of the corresponding target electrical device.

[0016] In the above implementation process, the rectifier unit is used to rectify the received AC power and output a first voltage through the fourth end of the rectifier unit; the first voltage is the total output voltage of the circuit, and the isolation unit isolates the first control signal to obtain and output a second control signal, which can realize the control of the power status and / or power of at least one corresponding target electrical device.

[0017] Optionally, the isolation unit includes: a protection subunit, a rectifier subunit, a voltage stabilization subunit, and an optical coupling subunit;

[0018] The protection subunit is connected to the rectifier unit and is used to protect the isolation unit;

[0019] The rectifier unit is connected to the optocoupler unit and is used to rectify the first control signal;

[0020] The voltage stabilizing subunit is connected in parallel with the rectifier unit, and is used to stabilize the voltage across the rectifier unit;

[0021] The optical coupler unit is used to isolate the rectified first control signal to obtain the second control signal.

[0022] In the above implementation process, the protection subunit can play a circuit protection role for the circuit in the isolation unit, the rectifier unit rectifies the first control signal, the voltage stabilizing subunit stabilizes the voltage across the rectifier unit, and the optocoupler subunit can isolate the rectified first control signal and obtain a second control signal for output.

[0023] Optionally, the protection subunit includes: a protection resistor; a first end of the protection resistor is connected to a second end of a switch unit in the signal generating module; and a second end of the protection resistor is connected to a first end of the rectifier unit.

[0024] In the above implementation process, the protection resistor is connected in series to the isolation unit circuit, which can play a circuit protection role for the isolation unit circuit.

[0025] Optionally, the rectifier unit includes: a first resistor, a second resistor, a first diode, and a first capacitor; the first resistor and the second resistor are connected in series and the positive electrode of the first diode is connected in series, wherein the second resistor is connected to the positive electrode of the first diode; the positive electrode of the first capacitor is connected to the negative electrode of the first diode; and the negative electrode of the first capacitor is connected to the ground wire.

[0026] In the above implementation process, the rectifier unit formed by the first resistor, the second resistor, the first diode, and the first capacitor plays a role in half-wave rectification of the first control signal.

[0027] Optionally, the voltage stabilizing subunit includes a first voltage stabilizing diode; a cathode of the first voltage stabilizing diode is connected to a connection point between the first diode and the optocoupler subunit; and an anode of the first voltage stabilizing diode is connected to the ground wire.

[0028] In the above implementation process, the first voltage stabilizing diode can stabilize the voltage across the first capacitor.

[0029] Optionally, the optical coupler unit includes: a third resistor, a second diode, a first transistor and a fourth resistor;

[0030] The first end of the third resistor is connected to the rectifier unit, the anode of the second diode is connected to the second end of the third resistor, and the cathode of the second diode is connected to the ground line;

[0031] The second diode is connected to the first transistor in a coupling manner;

[0032] The emitter of the first transistor is connected to the first end of the fourth resistor, the second end of the fourth resistor is connected to the second voltage, and the collector of the first transistor serves as the signal output end for outputting the target control signal.

[0033] In the above implementation process, the optical coupler unit can isolate the rectified first control signal and output a target control signal that can control the power supply status and / or power of multiple electrical devices.

[0034] In a second aspect, the present application provides a device control system, comprising: a plurality of electrical devices, and the control circuit described in the first aspect above;

[0035] A plurality of signal output terminals of the signal processing module in the control circuit are connected to the plurality of electrical devices.

[0036] In summary, the control circuit and device control system provided in the present application can realize the control of multiple electrical devices, and because the signal generating module can be connected from the live wire or the neutral wire arbitrarily, it is possible to achieve a more convenient control circuit wiring effect without increasing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1A schematic diagram of the structure of a control circuit provided in an embodiment of the present application.

[0039] Figure 2 A block diagram of a signal generating module of a control circuit provided in an embodiment of the present application.

[0040] Figure 3 A block diagram of a signal processing module of a control circuit provided in an embodiment of the present application.

[0041] Figure 4 A schematic diagram of the structure of a rectifier unit of a control circuit provided in an embodiment of the present application.

[0042] Figure 5 A schematic diagram of the isolation unit structure of the control circuit provided in an embodiment of the present application.

[0043] Figure 6 A circuit structure diagram of a control circuit provided in an embodiment of the present application.

[0044] Icon: 100-signal generation module; 200-signal processing module; 210-rectifier unit; 220-isolation unit; HV-high voltage; E-ground wire; 221-protection subunit; 222-rectifier unit; 223-voltage regulator subunit; 224-optocoupler subunit; F1-protection resistor; R1-first resistor; R2-second resistor; R3-third resistor; R4-fourth resistor; D1-first diode; ZD1-first voltage regulator diode; C1-first capacitor; +-capacitor positive pole; D2-second diode; BD1-first transistor; SOT_4-optocoupler; P-signal output terminal; VCC-low voltage; J2-socket; F2-second protection resistor; R5-fifth resistor; R6-sixth resistor; R7-seventh resistor; R8-eighth resistor; D3-third diode; ZD2-second voltage regulator diode; C2-second capacitor; D4-fourth diode; BD2-second transistor. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings in the embodiments of the present application.

[0046] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, it should be noted that the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance, and therefore cannot be interpreted as a limitation of this application.

[0047] In the description of this application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "module", "unit", "connection", etc. should be understood in a broad sense, for example, it 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, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] like Figure 1 As shown, Figure 1 The control circuit of this embodiment includes: a signal generating module 100 and a signal processing module 200.

[0049] The signal generating module 100 includes a plurality of switch units connected in parallel, wherein a first end of each switch unit is connected to a live wire or a neutral wire of a mains power supply, and a second end of each switch unit is connected to an input end of the signal processing module 200. For example, Figure 2 Schematic diagram of a signal generating module 100 of a control circuit provided in an embodiment of the present application. Figure 2 As shown, the signal generating module 100 includes a plurality of switch units S1, S2, ... Sn. In the figure, the mains L represents the live wire of the mains, and the mains N represents the neutral wire of the mains.

[0050] The signal generating module 100 is used to generate a first control signal based on the switching states of a plurality of switch units (S1, S2 . . . Sn).

[0051] Each switch unit Si (i = 1, 2, 3, ..., n) can generate two states of on or off, so that each output signal of the signal generation module 100 can present two states, namely, a state where current flows and a state where no current flows. In this embodiment, the signal generation circuit in the signal generation module 100 can be set as a single circuit output or a plurality of parallel circuit outputs as needed, that is, it can be understood that n can be equal to 1 or greater than 1. When n is greater than 1, the signal generation module 100 includes a plurality of switch units, and also has a plurality of signal generation circuits in parallel.

[0052] Exemplarily, each signal generating circuit generates a control signal of two states by closing or opening the switch unit S1, S2... or Sn. When the number of switch units is one, it is a single branch output, which can generate a control signal of two states; when the number of switch units is two, it is a two-branch output, and by permuting and combining the two different states that can be generated by the two branches, it can be combined into four different states of control signals; when the number of switch units is three, it can be combined into eight different states of control signals; and so on, when the number of switch units is n, it can generate 2 n For example, if the power consumption equipment is n lamps, since the power state of each lamp includes on and off, there are 2 power states of n lamps. n state, thus through the above 2 n The power states of n lamps can be controlled by control signals of different states.

[0053] Each input end of the signal processing module 200 is connected to an output end of the signal generating module 100. Each input end of the signal processing module 200 is used to receive a first control signal from the signal generating module 100, and output a target control signal for controlling an electric device based on the first control signal. Each signal output end P of the signal processing module 200 outputs the target control signal.

[0054] Among them, the second end of each switch unit is an output end of the signal generating module 100, and each output end is respectively connected to an input end of the signal processing module 200. Therefore, the signal processing module 200 includes at least n input ends, and the n input ends correspond to the switch units S1, S2...Sn respectively. After any switch unit Si of the signal generating module 100 generates a first control signal, the first control signal can be transmitted to the signal processing module 200 through the input end i of the signal processing module 200 connected to the switch unit Si. After receiving the first control signal, the signal processing module 200 rectifies and isolates the first control signal and then outputs a target control signal for controlling the target electrical device.

[0055] Exemplarily, there may be multiple electrical devices, corresponding to multiple switch units respectively. That is, for switch units S1, S2...Sn, there may be n electrical devices, respectively recorded as electrical devices 1 to n, corresponding to switch units S1, S2...Sn respectively, then the target electrical device corresponding to switch unit S1 is electrical device 1, the target electrical device corresponding to switch unit S2 is electrical device 2, and so on.

[0056] The closing or opening of different switch units among the switch units S1, S2...Sn can form a variety of different control signal combinations to control the opening or closing of different electrical devices. When the switch units S1 and S2 are closed and the other switch units are opened, a control signal combination can be formed to control the electrical devices 1 and 2 corresponding to the switch units S1 and S2 to be turned on, and the other electrical devices to be turned off; when the switch units S3 and S5 are closed and the other switch units are opened, another control signal combination can be formed to control the electrical devices 3 and 5 corresponding to the switch units S3 and S5 to be turned on, and the other electrical devices to be turned off.

[0057] Furthermore, the plurality of electrical devices may be n lamps, and since n first control signals can be generated based on the switch states of the plurality of switch units (S1, S2, ... Sn), the signal processing module 200 can output corresponding n target control signals based on the n first control signals, and the n lamps can be controlled by the n target control signals. In addition to lamps, the plurality of electrical devices may also be other electrical devices.

[0058] Therefore, the above implementation can realize the control of multiple electrical devices, and because the signal generation module can be connected from the live wire or the neutral wire at will, it is possible to achieve the effect of more convenient control circuit wiring without increasing the cost.

[0059] Optionally, each switch unit (S1, S2, . . . or Sn) may include at least one switch device.

[0060] Exemplarily, each of the at least one switching device included in the switching unit can be any one of a mechanical switch, a relay, and a MOS (Metal Oxide Semiconductor) tube, but is not limited to the above-mentioned mechanical switches, relays, and MOS tubes. In addition, the switching device can also be any other device that can be used as a switch.

[0061] Optionally, the control circuit provided in this embodiment can also control the power of the above-mentioned electrical equipment through the target control signal. For example, different states represented by multiple target control signals can be associated with different powers.

[0062] Alternatively, if Figure 3 As shown, Figure 3 The block diagram of the signal processing module 200 of the control circuit provided in the embodiment of the present application is as follows: The signal processing module 200 may include: a rectifier unit 210 and a plurality of isolation units 220 , wherein the rectifier unit 210 and the plurality of isolation units 220 are connected via a ground line E.

[0063] Among them, the first end of the rectifier unit 210 is connected to the ground wire E, the second and third ends of the rectifier unit 210 are respectively connected to the live wire and the neutral wire of the AC power, and the fourth end of the rectifier unit 210 serves as the voltage output end. The rectifier unit 210 is used to rectify the received AC power and output a first voltage through the fourth end of the rectifier unit 210, and the first voltage can be a high voltage HV.

[0064] The first end of each isolation unit 220 is connected to the ground line E, the second end of each isolation unit 220 is connected to a second voltage, which may be a low voltage VCC, the third end of each isolation unit 220 is connected to the signal generating module 100 as an input end of the signal processing module 200, and the fourth end of each isolation unit 220 is used as a signal output end P of the signal processing module 200, for isolating the first control signal received from the signal generating module 100 to obtain a second control signal, and outputting the second control signal as a target control signal through the third end of each isolation unit 220, for controlling the power state and / or power of the corresponding target electrical device.

[0065] In the above implementation process, the rectifier unit 210 rectifies the received AC power and outputs the first voltage through the fourth terminal of the rectifier unit 210. The second terminal of each isolation unit 220 is connected to the second voltage, which is the low voltage VCC, and the low voltage VCC is used to provide driving energy for the isolation unit 220.

[0066] The first end of the rectifying unit 210 is grounded, and the first end of each isolating unit 220 is grounded, and the rectifying unit 210 and each isolating unit 220 are connected via a ground wire E, thereby achieving a more convenient control circuit wiring effect.

[0067] Each isolation unit 220 isolates the first control signal to obtain a second control signal and outputs the second control signal, thereby enabling control of the power supply status and / or power of a plurality of corresponding target electrical devices.

[0068] Optionally, Figure 4 Schematic diagram of the structure of the rectifier unit 210 of the control circuit provided in the embodiment of the present application. Figure 4As shown, the rectifier unit 210 includes four diodes and a transformer, and the four diodes are connected in a bridge circuit. Among them, the bridge circuit formed by the four diodes connected in a bridge circuit includes two branches, each branch includes two diodes connected in series, the first connection point of the two branches (the connection point of the positive poles of the diodes in the two branches) is connected to the ground line E, and the second connection point of the two branches (the connection point of the negative poles of the diodes in the two branches) outputs a first voltage as a voltage output terminal, and the first voltage is a high voltage HV. The midpoints of the two branches (the connection points of the two diodes in the branches) are respectively connected to the two ends of one side of the transformer, and the two ends of the other side of the transformer are used to connect the neutral line and the live line of the mains.

[0069] The bridge circuit is used to rectify the received mains power and output a first voltage through the second connection point of the two branches of the bridge circuit in the rectifier unit 210, wherein the mains power is AC power and the first voltage is DC power. That is, the bridge circuit rectifies the AC current of the mains power into DC current.

[0070] Alternatively, if Figure 5 As shown, Figure 5 A schematic diagram of the structure of the isolation unit 220 of the control circuit provided in an embodiment of the present application. The isolation unit 220 includes: a protection subunit 221, a rectifier unit 222, a voltage stabilizing subunit 223, and an optocoupler subunit 224. The protection subunit 221 is connected to the rectifier unit 222 to protect the isolation unit 220. The rectifier unit 222 is connected to the optocoupler subunit 224 to rectify the first control signal. The voltage stabilizing subunit 223 is connected in parallel with the rectifier unit 222 to stabilize the voltage across the rectifier unit 222. The optocoupler subunit 224 is used to isolate the rectified first control signal to obtain the second control signal.

[0071] In the above implementation process, the first control signal is transmitted to the rectifier unit 222 through the protection subunit 221. The rectifier unit 222 rectifies the first control signal, and then transmits the rectified control signal to the optocoupler SOT_4, and obtains the second control signal after isolation by the optocoupler SOT_4, and outputs the second control signal as the target control signal.

[0072] Alternatively, if Figure 5 As shown, the protection subunit 221 includes: a protection resistor F1.

[0073] The first end of the protection resistor F1 is connected to the second end of a switch unit in the signal generation module 100 through the socket J2. The second end of the protection resistor F1 is connected to the first end of the first resistor R1.

[0074] In the above implementation process, the first end of the protection resistor F1 is connected to the socket J2 to be connected to the second end of a switch unit through the socket J2. The second end of the protection resistor F1 is connected in series with the first resistor R1, can receive the first control signal, and can play a role in circuit protection.

[0075] Alternatively, if Figure 5 As shown, the rectifier unit 222 includes: a first resistor R1, a second resistor R2, a first diode D1, and a first capacitor C1. The first resistor R1 and the second resistor R2 are connected in series with the positive electrode of the first diode D1, wherein the second resistor R2 is connected to the positive electrode of the first diode D1. The positive electrode (+) of the first capacitor C1 is connected to the negative electrode of the first diode D1. The negative electrode of the first capacitor C1 is connected to the ground line E.

[0076] In the above implementation process, the first resistor R1, the second resistor R2, the first diode D1, and the first capacitor C1 form a rectifier unit 222, which performs half-wave rectification on the first control signal received from the signal processing module 100, and then transmits the half-wave rectified first control signal to the optocoupler unit 224.

[0077] Optionally, the voltage stabilizing subunit 223 includes a first voltage stabilizing diode ZD1; the cathode of the first voltage stabilizing diode ZD1 is connected to the connection point between the first diode D1 and the optocoupler subunit 224. The anode of the first voltage stabilizing diode ZD1 is connected to the ground line E.

[0078] In the above implementation process, the first voltage stabilizing diode ZD1 can stabilize the voltage across the first capacitor C1 in the rectifier unit 222 , thereby protecting the rectifier unit 222 .

[0079] Alternatively, if Figure 5 As shown, the optocoupler unit 224 includes: a third resistor R3, a second diode D2, a first transistor BD1 and a fourth resistor R4. The first end of the third resistor R3 is connected to the rectifier unit 222, the anode of the second diode D2 is connected to the second end of the third resistor R3, and the cathode of the second diode D2 is connected to the ground line E. The second diode D2 is connected to the first transistor BD1 in a coupled manner. The emitter of the first transistor BD1 is connected to the first end of the fourth resistor R4, and the second end of the fourth resistor R4 is connected to the second voltage, which is a low voltage VCC. The collector of the first transistor BD1 serves as a signal output terminal P for outputting the target control signal. The second diode D2 and the first transistor BD1 form an optocoupler SOT_4.

[0080] Exemplarily, the first control signal is transmitted to the second diode D2 by the third resistor R3. The second diode D2 is connected to the first transistor BD1 in a coupling manner to form an optocoupler SOT_4. The emitter of the first transistor BD1 is connected in series with the fourth resistor R4 and connected to the low voltage VCC, and the low voltage VCC provides driving energy to drive the first transistor BD1 to operate. The second diode D2 and the first transistor BD1 form an optocoupler SOT_4, which isolates the control signal and outputs the target control signal from the signal output terminal P. The signal output terminal P is connected to a controller, which can be a single-chip microcomputer, which is used to receive the target control signal output by the optocoupler sub-unit 224. The above-mentioned controller is not limited to a single-chip microcomputer, and can also be any other device with processing functions, such as a logic circuit, a CPU, an MCU, etc.

[0081] Figure 6 A circuit structure diagram of a control circuit provided in an embodiment of the present application, such as Figure 6 As shown, the first end of each of the multiple switch units S1~Sn in the signal generating module 100 is electrically connected to the live wire (or neutral wire) of the AC power, and the second end is connected to the socket J2 as an output end of the signal generating module 100; the signal processing module 200 includes a rectifier unit 210 and multiple isolation units 220, for each isolation unit 220, its first end is connected to the ground wire E, the second end is connected to the second voltage VCC, the third end is connected to the socket J2 as an input end of the signal processing module, and the fourth end is a signal output end P of the signal processing module 200, so that an output end of the signal generating module 100 is connected to an isolation unit 220 of the signal processing module 200 through the socket J2. Wherein, the structure of each isolation unit 220 is the same. As shown Figure 6 The second isolation unit 220 shown in the figure includes a second protection resistor F2, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a third diode D3, a second voltage stabilizing diode ZD2, a second capacitor C2-, a fourth diode D4 and a second triode BD2, which respectively have the same functions as the protection resistor F1, the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the first diode D1, the first voltage stabilizing diode ZD1, the first capacitor C1, the second diode D2 and the first triode BD1 in the first isolation unit 220. By analogy, the circuit structures of the other isolation units 220 and the functions of the various components in the circuits can refer to the first isolation unit 220, and will not be described in detail.

[0082] The present application provides a device control system, comprising: a plurality of electrical devices, and the above Figures 1 to 6 The control circuit described in any embodiment;

[0083] The multiple signal output terminals P of the signal processing module 200 in the control circuit are connected to multiple electrical devices. For example, the multiple signal output terminals P of the signal processing module 200 are connected to a single-chip microcomputer, and each input terminal of the single-chip microcomputer is used to receive a target control signal output by each signal output terminal P, and control the corresponding electrical device according to each target control signal. In the above embodiment, it is not limited to a single-chip microcomputer, and it can also be any other device with processing functions, such as a logic circuit, a CPU, an MCU, etc. The implementation method of the device control system to control the multiple electrical devices is the same as the above Figures 1 to 6 The implementation method described in any embodiment is the same and will not be repeated here.

[0084] In summary, in the control circuit and device control system provided by the present application, the first end of each switch unit is connected to the live wire or neutral wire of the mains, and the signal generation module generates a first control signal based on the switch state of each switch unit, and transmits the first control signal to the signal processing module, so that the signal processing module processes each received first control signal and outputs a target control signal for controlling the corresponding target electrical device. Thus, the control of multiple electrical devices can be achieved, and since the signal generation module can be arbitrarily connected from the live wire or neutral wire, it is possible to achieve a more convenient control circuit wiring effect without increasing the cost.

[0085] The above description is only an optional embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0086] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A control circuit, characterized in that: The control circuit comprises: a signal generating module and a signal processing module; The signal generating module comprises a plurality of switch units connected in parallel, a first end of each of the switch units is connected to a live wire or a neutral wire of the mains, and a second end of each of the switch units is connected to an input end of the signal processing module; The signal generating module is used to generate a first control signal based on the switch state of each of the switch units; The signal processing module is configured to receive the first control signal from the signal generating module, and output a target control signal for controlling a corresponding target electrical device based on the first control signal; The signal processing module includes: a rectifier unit and a plurality of isolation units, wherein the rectifier unit and the plurality of isolation units are connected via a ground line; The first end of the rectifier unit is connected to the ground wire, the second end and the third end of the rectifier unit are respectively connected to the live wire and the neutral wire of the mains, the fourth end of the rectifier unit serves as a voltage output end, and the rectifier unit is used to rectify the received mains power and output a first voltage through the fourth end of the rectifier unit; The first end of each isolation unit is connected to the ground line, the second end of the isolation unit is connected to the second voltage, the third end of the isolation unit is connected to the signal generating module as an input end of the signal processing module, and the fourth end of the isolation unit is used as a signal output end of the signal processing module, for isolating the first control signal received from the signal generating module to obtain a second control signal, and outputting the second control signal as the target control signal through the third end of the isolation unit, for controlling the power state and / or power of the corresponding target electrical device; The switch unit includes: at least one switch device.

2. The control circuit according to claim 1, characterized in that: The switch device includes: any one of a mechanical switch, a relay, and a MOS tube.

3. The control circuit according to claim 1, characterized in that: The isolation unit includes: a protection subunit, a rectifier subunit, a voltage stabilization subunit, and an optical coupling subunit; The protection subunit is connected to the rectifier unit and is used to protect the isolation unit; The rectifier unit is connected to the optocoupler unit and is used to rectify the first control signal; The voltage stabilizing subunit is connected in parallel with the rectifier unit, and is used to stabilize the voltage across the rectifier unit; The optical coupler unit is used to isolate the rectified first control signal to obtain the second control signal.

4. The control circuit according to claim 3, characterized in that: The protection subunit includes: a protection resistor; The first end of the protection resistor is connected to the second end of a switch unit in the signal generating module; The second end of the protection resistor is connected to the first end of the rectifier unit.

5. The control circuit according to claim 3, characterized in that: The rectifier unit includes: a first resistor, a second resistor, a first diode, and a first capacitor; The first resistor, the second resistor and the anode of the first diode are connected in series, wherein the second resistor is connected to the anode of the first diode; The positive electrode of the first capacitor is connected to the negative electrode of the first diode; A negative electrode of the first capacitor is connected to the ground line.

6. The control circuit according to claim 5, characterized in that: The voltage stabilizing subunit includes a first voltage stabilizing diode; The cathode of the first voltage stabilizing diode is connected to a connection point between the first diode and the optocoupler unit; An anode of the first voltage stabilizing diode is connected to the ground line.

7. The control circuit according to claim 3, characterized in that: The optical coupler unit includes: a third resistor, a second diode, a first transistor and a fourth resistor; The first end of the third resistor is connected to the rectifier unit, the anode of the second diode is connected to the second end of the third resistor, and the cathode of the second diode is connected to the ground line; The second diode is connected to the first transistor in a coupling manner; The emitter of the first transistor is connected to the first end of the fourth resistor, the second end of the fourth resistor is connected to the second voltage, and the collector of the first transistor serves as the signal output end for outputting the target control signal.

8. A device control system, characterized in that: include: A plurality of electrical devices, and a control circuit as claimed in any one of claims 1 to 7; A plurality of signal output terminals of the signal processing module in the control circuit are connected to the plurality of electrical devices.

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