Safety protection communication control module for dual-power supply system

Abstract

The utility model relates to the technical field of power supply equipment, in particular to a safety protection communication control module for a dual-power supply system. According to the technical scheme, the device comprises a low-voltage direct-current power supply module, a pulse square wave output circuit, a direct-current switching circuit, an alternating-current switching circuit, a direct-current trigger protection circuit, an alternating-current trigger protection circuit, a communication sending module and a communication receiving module. The beneficial effects are that the low-voltage DC power supply module is arranged to cooperate with the pulse square wave output circuit and the DC switch circuit to output pulse square wave DC with a certain frequency and duty ratio on the ground zero line; and communication control and trigger signal transmission can be carried out by using the time period of zero potential in the pulse square wave direct current, so that safety protection and communication control of the power supply system are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply equipment, in particular to a safety protection communication control module for a dual power supply system. Background Art

[0002] Most of the current power supply systems are AC power supply systems with ground zero and live wires, which are commonly known as mains power supply systems. The ground wire of this system is only used as a protective wire for ground protection. If low-voltage DC power supply or safety protection devices such as fire alarm systems are to be installed, additional conversion equipment or related lines need to be laid. With the popularization of smart appliances, there are more demands for low-voltage DC power supply and communication control of smart appliances, which leads to inconvenience in power supply or control. At the same time, the additional fire alarm system cannot be linked with the existing power supply system. Utility Model Content

[0003] The utility model aims to provide a safety protection communication control module for a dual power supply system, which can output low-voltage direct current on the ground neutral line based on the original ground neutral live line system and use the ground neutral line to achieve communication control and safety protection functions.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a safety protection communication control module for a dual power supply system, comprising a low-voltage DC power supply module, a pulse square wave output circuit, a DC switching circuit, an AC switching circuit, a DC trigger protection circuit, an AC trigger protection circuit, a communication sending module and a communication receiving module; the low-voltage DC power supply module is connected to the ground neutral line through the DC switching circuit, and the AC switching circuit is connected to the live neutral line; the output end of the pulse square wave output circuit is connected to the DC switching circuit, and the pulse square wave output circuit triggers the DC switching circuit to turn on when it outputs a high level; the DC trigger protection circuit is connected to the pulse square wave output circuit to trigger the pulse square wave output circuit to start or shut down, and the AC trigger protection circuit is connected to the AC switching circuit The connection is used to trigger the AC switch circuit to be turned on or off; the communication sending module includes an encoder and a first reverse voltage output circuit, the input end of the encoder is the control information input end, and the output end of the encoder is used to control the first reverse voltage output circuit to be turned on or off. When the first reverse voltage output circuit is turned on, it outputs a reverse voltage to the ground zero line during the low level period of the pulse square wave DC power supply on the ground zero line; the communication receiving module includes a decoder and a first reverse voltage receiving circuit, the first reverse voltage output circuit and the second reverse voltage receiving circuit are both connected in parallel to the ground zero line, the first reverse voltage receiving circuit is turned on when a reverse voltage appears on the ground zero line, and the first reverse voltage receiving circuit outputs a high level to the input end of the decoder when it is turned on, and the output end of the decoder is the control information output end.

[0005] Specifically, the pulse square wave output circuit adopts a dual-frequency pulse square wave output circuit, including a high-frequency oscillation circuit, a low-frequency oscillation circuit, a high-low frequency switching circuit and a push-pull output circuit. The high-frequency oscillation circuit and the low-frequency oscillation circuit are both connected to the push-pull output circuit through the high-low frequency switching circuit.

[0006] Specifically, it also includes a wireless communication processing module, which includes a processor, a wireless communication module, and a second reverse voltage output circuit and / or a second reverse voltage receiving circuit; the second reverse voltage output circuit and / or the second reverse voltage receiving circuit are also connected in parallel to the ground neutral line; the processor is connected to other devices for wireless communication through the wireless communication module, and the processor triggers the second reverse voltage output circuit to turn on or off according to the input control information of the wireless communication module. When the second reverse voltage output circuit is turned on, it outputs a reverse voltage to the ground neutral line during the low level period of the pulsed square wave DC power supply on the ground neutral line. The second reverse voltage receiving circuit is turned on when a reverse voltage appears on the ground neutral line. When the second reverse voltage receiving circuit is turned on, it outputs a high level to the processor. The processor processes the high level output by the second reverse voltage receiving circuit into output control information and sends it to other devices through the wireless communication module.

[0007] Specifically, the DC trigger protection circuit includes one or more of an over-temperature trigger circuit, a DC manual switch circuit, and an under-voltage trigger circuit.

[0008] Specifically, the AC trigger protection circuit includes one or more of a fault trigger circuit, a leakage trigger circuit, an AC manual switch circuit, an over-voltage or under-voltage trigger circuit, and an overload trigger circuit.

[0009] Specifically, the fault trigger circuit is a fire linkage alarm module, including an alarm information sending module and an alarm information receiving circuit, the alarm information sending module and the alarm information receiving circuit are both connected in parallel to the ground neutral line, the alarm information sending module includes a trigger circuit and a third reverse voltage output circuit, the alarm information receiving circuit includes a third reverse voltage receiving circuit and a linkage response circuit, and the third reverse voltage receiving circuit triggers the linkage response circuit to turn on according to the reverse voltage.

[0010] Specifically, the first reverse voltage output circuit and the second reverse voltage output circuit both use an inductor circuit with a trigger conduction circuit.

[0011] Specifically, the first reverse voltage receiving circuit and the second reverse voltage receiving circuit both use an optocoupler triggered conduction circuit.

[0012] Specifically, the trigger circuit of the alarm information sending module is multiple and can trigger the reverse voltage output circuit to output reverse voltages of different voltage values.

[0013] Specifically, there are multiple alarm information receiving modules connected in parallel to the ground neutral line, and there are multiple reverse voltage receiving circuits of the multiple alarm information receiving modules, which use switch circuits triggered by different reverse voltage values.

[0014] The beneficial effect of the utility model is that by setting a low-voltage DC power supply module in conjunction with a pulse square wave output circuit and a DC switching circuit to output a pulse square wave DC with a certain frequency and duty cycle on the ground neutral line, while realizing dual power supply, the zero potential time period in the pulse square wave DC can also be used for communication control and transmission of trigger signals, thereby realizing safety protection and communication control of the power supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 This is a schematic diagram of the connection between the safety protection communication control module and the power supply system in the embodiment;

[0016] Attached Figure 2 It is a circuit connection diagram of the dual-frequency pulse square wave output circuit in the embodiment;

[0017] Attached Figure 3 A circuit connection diagram of a communication sending module in an embodiment;

[0018] Attached Figure 4 A circuit connection diagram of a communication receiving module in an embodiment;

[0019] Attached Figure 5 A circuit connection diagram of a wireless communication control module in an embodiment;

[0020] Attached Figure 6 It is a circuit connection diagram of an alarm information sending module using a fire detection sensor as a trigger circuit in an embodiment;

[0021] Attached Figure 7 A circuit connection diagram of an alarm information sending module using a manual trigger switch as a trigger circuit in an embodiment;

[0022] Attached Figure 8 A circuit connection diagram of an alarm information receiving module using a fire alarm as a linkage response circuit in an embodiment;

[0023] Attached Fig. 9 4 is a circuit connection diagram of an alarm information receiving module using a control solenoid valve as a linkage response circuit in an embodiment. DETAILED DESCRIPTION

[0024] Example 1, reference Figure 1-9, a safety protection communication control module for a dual power supply system, comprising a low-voltage DC power supply module, a pulse square wave output circuit, a DC switching circuit, an AC switching circuit, a DC trigger protection circuit, an AC trigger protection circuit, a communication sending module and a communication receiving module; the low-voltage DC power supply module is connected to the ground neutral line through the DC switching circuit, and the AC switching circuit is connected to the live neutral line; the output end of the pulse square wave output circuit is connected to the DC switching circuit, and the DC switching circuit is triggered to turn on when the pulse square wave output circuit outputs a high level; the DC trigger protection circuit is connected to the pulse square wave output circuit to trigger the pulse square wave output circuit to start or shut down, and the AC trigger protection circuit is connected to the AC switching circuit to trigger the AC switch The communication sending module includes an encoder and a first reverse voltage output circuit, the input end of the encoder is a control information input end, and the output end of the encoder is used to control the first reverse voltage output circuit to be turned on or off. When the first reverse voltage output circuit is turned on, it outputs a reverse voltage to the ground zero line during the low level period of the pulse square wave DC power supply on the ground zero line; the communication receiving module includes a decoder and a first reverse voltage receiving circuit, the first reverse voltage output circuit and the second reverse voltage receiving circuit are both connected in parallel to the ground zero line, the first reverse voltage receiving circuit is turned on when a reverse voltage appears on the ground zero line, and the first reverse voltage receiving circuit outputs a high level to the input end of the decoder when it is turned on, and the output end of the decoder is a control information output end.

[0025] In this embodiment, the low-voltage DC power supply module can output low-voltage DC power by setting a battery or by using a solar cell, and output it to the ground neutral line through a DC switching circuit. In addition, an AC-to-DC circuit can be used to convert the AC power of the mains into low-voltage DC power to charge the battery and output low-voltage DC power through a DC switching circuit. Specifically, the output ground line is the positive output of the low-voltage DC power, and the output neutral line is the negative output of the low-voltage DC power. The pulse square wave output circuit is used to output a pulse square wave signal of a certain frequency to the DC switching circuit, triggering the DC switching circuit to turn on. When the pulse square wave output circuit outputs a high level, the DC switching circuit is turned on. When the pulse square wave output circuit outputs a low level, the DC switching circuit is turned off. Therefore, when the pulse square wave output circuit is working normally, a pulse square wave DC power with the same frequency as the pulse square wave output circuit is output on the ground neutral line, and the low-voltage DC power supply is increased on the basis of the conventional mains AC power. In addition, the DC trigger protection circuit can detect faults in the DC power and trigger the pulse square wave output circuit to start or shut down, or trigger the pulse square wave output circuit to start or shut down according to the state of the trigger switch. By triggering the pulse square wave output circuit to shut down, the DC switch circuit can be turned off to shut down the DC power output on the ground neutral line. The AC trigger protection circuit can detect faults in the AC power and control the output of the AC power by triggering the conduction or disconnection of the AC switch circuit. Among them, the DC switch circuit can use a transistor switch circuit, preferably a field effect transistor switch circuit. When the input end is at a high level, the transistor or field effect transistor can be triggered to turn on to realize the conduction of the DC switch circuit; the AC switch circuit uses a relay switch circuit, which controls the conduction or disconnection of the relay by controlling the power supply of the relay coil to turn on or off. The first reverse voltage output circuit of the communication sending module can use the zero potential time period in the pulsed square wave direct current to send a reverse voltage pulse to the first reverse voltage receiving circuit of the communication receiving module. The communication sending module uses an encoder to encode the control signal to obtain a series of high and low level pulses and output it to the first reverse voltage output circuit, so that it is triggered to turn on with the same pulse, thereby sending the same pulse signal to the first reverse voltage receiving circuit. The first reverse voltage receiving circuit is intermittently turned on according to the pulse signal, thereby sending the same pulse signal to the decoder, and the decoder then decodes the series of pulse signals to obtain the original control signal, thereby realizing effective transmission of the control signal.

[0026] In this embodiment, the pulse square wave output circuit can be a conventional pulse square wave output circuit that outputs a single frequency. However, when the frequency of the pulse square wave direct current output by the pulse square wave output circuit is low, such as when the frequency is 100 Hz and the duty cycle is 90%, the power of the low-voltage direct current output on the ground neutral line is higher. However, at this frequency, the efficiency of signal transmission between the communication sending module and the communication receiving module will be lower. If the frequency of the pulse square wave output circuit is higher, the power of the low-voltage direct current output on the ground neutral line will be reduced. Therefore, in a further embodiment, the pulse square wave output circuit adopts a dual-frequency pulse square wave output circuit, including a high-frequency oscillation circuit, a low-frequency oscillation circuit, a high-low frequency switching circuit and a push-pull output circuit, and the high-frequency oscillation circuit and the low-frequency oscillation circuit are both connected to the push-pull output circuit through the high-low frequency switching circuit; the high-low frequency switching circuit can switch the frequency of the pulse square wave output circuit output by the pulse square wave output circuit. Specifically, the high-low frequency switching circuit can detect the reverse voltage on the ground neutral line. When a reverse voltage appears on the ground neutral line, the high-frequency oscillation circuit of the pulse square wave output circuit is controlled to be connected to the push-pull output circuit to output high-frequency pulse square wave direct current, thereby improving communication efficiency. When there is no reverse voltage on the ground neutral line, it will switch to the low-frequency oscillation circuit and the push-pull output circuit to output low-frequency pulse direct current, thereby increasing the output power of the low-voltage direct current on the ground neutral line.

[0027] In a further embodiment, a wireless communication processing module is also included, which includes a processor, a wireless communication module, and a second reverse voltage output circuit and / or a second reverse voltage receiving circuit; the second reverse voltage output circuit and / or the second reverse voltage receiving circuit are also connected in parallel to the ground neutral line; the processor is connected to other devices for wireless communication through the wireless communication module, and the processor triggers the second reverse voltage output circuit to turn on or off according to the input control information of the wireless communication module. When the second reverse voltage output circuit is turned on, it outputs a reverse voltage to the ground neutral line during the low level period of the pulsed square wave DC power supply on the ground neutral line. The second reverse voltage receiving circuit is turned on when a reverse voltage appears on the ground neutral line. When the second reverse voltage receiving circuit is turned on, it outputs a high level to the processor. The processor processes the high level output by the second reverse voltage receiving circuit into output control information and sends it to other devices through the wireless communication module. The working principle of the wireless communication module is the same as that of the communication sending module and the communication receiving module. The difference is that the control signal can be sent or received through the wireless communication module. Specifically, the processor can encode the control signal received by the wireless communication module and send the corresponding reverse voltage pulse to the ground neutral line through the second reverse voltage output circuit, and the processor can decode the reverse voltage pulse received by the second reverse voltage receiving circuit from the ground neutral line into a control signal and send it through the wireless communication module.

[0028] Specifically, the first reverse voltage output circuit and the second reverse voltage output circuit both use an inductor circuit with a trigger conduction circuit. When the first reverse voltage output circuit receives a high level, it will trigger the conduction inductor circuit. The inductor is charged during the high level time period of the pulsed square wave DC on the ground neutral line and sends a reverse voltage pulse during the low level time period; the first reverse voltage receiving circuit and the second reverse voltage receiving circuit both use an optocoupler trigger conduction circuit, and use the optocoupler to detect the reverse voltage on the ground neutral line. When there is a reverse voltage, the optocoupler is turned on to send a high level, thereby realizing the reception of the reverse voltage pulse on the ground neutral line.

[0029] Specifically, the DC trigger protection circuit includes one or more of an over-temperature trigger circuit, a DC manual switch circuit, and an under-voltage trigger circuit. Among them, the DC trigger protection circuit can control the conduction of the transistor and connect its collector end to the output end of the oscillation circuit. When the transistor is turned on, the level of the output end of the oscillation circuit can be pulled down to achieve the effect of shutting down the low-voltage DC power supply. Specifically, the over-temperature trigger circuit sets a thermistor, and when the operating temperature is too high, it will trigger the pulse square wave output circuit to shut down. The DC manual switch circuit triggers the start or shut down of the pulse square wave output circuit by switch triggering. The under-voltage trigger circuit triggers the start or shut down of the pulse square wave output circuit by detecting the voltage of the power supply output by the low-voltage DC power supply module.

[0030] Specifically, the AC trigger protection circuit includes one or more of a fault trigger circuit, a leakage trigger circuit, an AC manual switch circuit, an over-voltage or under-voltage trigger circuit, and an overload trigger circuit. Among them, the fault trigger circuit is a fire linkage alarm module, including an alarm information sending module and an alarm information receiving module, the alarm information sending module and the alarm information receiving module are both connected in parallel to the ground neutral line, the alarm information sending module includes a trigger circuit and a third reverse voltage output circuit, the alarm information receiving module includes a third reverse voltage receiving circuit and a linkage response circuit, and the third reverse voltage receiving circuit triggers the linkage response circuit to turn on according to the reverse voltage. It should be noted that in addition to the trigger protection involved in the above-mentioned AC trigger circuit, in order to ensure the safety of the power supply system, a varistor needs to be set between the ground wire and the neutral wire. The varistor can be used to clamp the voltage on the ground wire. When the ground wire is short-circuited with the live wire, causing the voltage on the ground wire to rise rapidly and reach the conduction voltage of the varistor, the varistor between the ground wire and the neutral wire can be used to discharge the ground wire, and the large current generated by the discharge process triggers the conventionally set protector in the power supply system to trip and disconnect the AC power, thereby protecting the entire power supply system. In addition, the protectors commonly installed in the power supply system can also trigger tripping of overcurrent or surge current occurring in the power supply system, providing the most basic safety protection for the power supply system.

[0031] Among them, the third reverse voltage output circuit of the alarm information sending module can use the zero potential time period in the pulse square wave direct current to output the reverse voltage to the reverse voltage receiving circuit of the alarm information receiving module, thereby realizing the transmission of the alarm information. Specifically, the third reverse voltage output circuit can adopt an inductance circuit. After the trigger circuit of the alarm information sending module triggers the reverse voltage output circuit to be connected with the ground neutral line, the third reverse voltage output circuit uses the high level of the pulse square wave direct current on the ground neutral line to charge the inductance therein, and sends a reverse voltage pulse to the ground neutral line at the low level of the pulse square wave direct current. After receiving the reverse voltage pulse output by the third reverse voltage output circuit, the third reverse voltage receiving circuit will trigger the linkage response circuit to be turned on, thereby realizing the trigger response of the fire alarm.

[0032] Among them, the alarm information sending module can be multiple and used to realize the sending of different types of fire alarm information. The type of the alarm information sending module depends on the type of the trigger circuit therein. The type of the trigger circuit includes but is not limited to a fire detection sensor and a manual trigger switch. The fire detection sensor can be a smoke sensor, a gas / natural gas sensor, etc. When a fire risk is detected in the environment, a reverse voltage pulse can be sent to the ground neutral line by triggering the third reverse voltage output circuit to be connected to the ground neutral line, thereby triggering the linkage response circuit of the alarm information receiving module. The trigger circuit of the alarm information sending module can have multiple different trigger circuits corresponding to one third reverse voltage output circuit, or one trigger circuit corresponding to one third reverse voltage output circuit, which can be adjusted according to the actual triggering requirements.

[0033] In addition, there may be multiple alarm information receiving modules connected in parallel to the neutral line; the multiple alarm information receiving modules may be of different types, the difference mainly lies in the linkage response circuit, including but not limited to: fire alarm and control solenoid valve. The fire alarm can sound an alarm when triggered, and the control solenoid valve can be set on the gas / natural gas pipeline as a switch to control the gas / natural gas.

[0034] In addition, in order to make the triggering of different alarm information sending modules correspond to the triggering of different alarm information receiving modules, for example, when the alarm information sending module using a manual trigger switch as a trigger circuit is triggered to send a reverse voltage, it is only necessary to use the fire alarm as the fire information receiving module of the linkage response circuit to trigger conduction, and when the alarm information sending module using a smoke sensor as a trigger circuit is triggered, it is necessary to use the fire alarm and the control solenoid valve as the fire information receiving module of the linkage response circuit to trigger conduction. The third reverse voltage receiving circuit can be multiple and use a switch circuit that is triggered and turned on by different reverse voltage values. Correspondingly, the third reverse voltage output circuit also uses a circuit that outputs different reverse voltage values. Taking the above situation as an example, in the alarm information sending module using a manual trigger switch as a trigger circuit, the third reverse voltage output circuit outputs a lower reverse voltage, while in the alarm information sending module using a smoke sensor as a trigger circuit, the third reverse voltage output circuit uses a circuit that outputs a higher voltage. Correspondingly, the trigger voltage of the third reverse voltage receiving circuit in the fire information receiving module using a fire alarm as a linkage response circuit is lower, while the trigger voltage of the fire information receiving module using a control solenoid valve as a linkage response circuit is higher, which can meet the requirements of the above situation. Specifically, the third reverse voltage output by the reverse voltage output circuit can be adjusted by connecting different numbers of diodes in series or in parallel to the inductance of the third reverse voltage output circuit, and the reverse voltage receiving circuit can adjust its triggered reverse voltage by using an optical coupler switch circuit and selecting optical couplers with different conduction voltages.

[0035] In addition, it should be noted that in order to separate the control signal transmission between the communication sending module and the communication receiving module from the signal transmission of the fire linkage alarm module, the reverse voltage values ​​output by the first reverse voltage output circuit and the second reverse voltage output circuit of the communication sending module and the communication receiving module can be set to be lower than the voltage value output by the third reverse voltage output circuit, and the reverse voltage values ​​triggered by the first reverse voltage receiving circuit and the second reverse voltage receiving circuit are also lower than the reverse voltage value triggered by the third reverse voltage output circuit.

[0036] Of course, the above are only preferred implementation modes of the present utility model, and are not intended to limit the scope of use of the present utility model. Therefore, any equivalent changes made to the principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A safety protection communication control module for a dual power supply system, characterized in that: It includes a low-voltage DC power supply module, a pulse square wave output circuit, a DC switch circuit, an AC switch circuit, a DC trigger protection circuit, an AC trigger protection circuit, a communication sending module and a communication receiving module; the low-voltage DC power supply module is connected to the ground neutral line through the DC switch circuit, and the AC switch circuit is connected to the live neutral line; the output end of the pulse square wave output circuit is connected to the DC switch circuit, and the DC switch circuit is triggered to turn on when the pulse square wave output circuit outputs a high level; the DC trigger protection circuit is connected to the pulse square wave output circuit to trigger the pulse square wave output circuit to start or shut down, and the AC trigger protection circuit is connected to the AC switch circuit to trigger the AC switch circuit to turn on or off; the The communication sending module includes an encoder and a first reverse voltage output circuit, the input end of the encoder is a control information input end, the output end of the encoder is used to control the first reverse voltage output circuit to be turned on or off, and when the first reverse voltage output circuit is turned on, it outputs a reverse voltage to the ground neutral line during the low level period of the pulse square wave DC power supply on the ground neutral line; the communication receiving module includes a decoder and a first reverse voltage receiving circuit, the first reverse voltage output circuit and the second reverse voltage receiving circuit are both connected in parallel to the ground neutral line, the first reverse voltage receiving circuit is turned on when a reverse voltage appears on the ground neutral line, and when the first reverse voltage receiving circuit is turned on, it outputs a high level to the input end of the decoder, and the output end of the decoder is a control information output end.

2. A safety protection communication control module for a dual power supply system according to claim 1, characterized in that: The pulse square wave output circuit adopts a dual-frequency pulse square wave output circuit, including a high-frequency oscillation circuit, a low-frequency oscillation circuit, a high-low frequency switching circuit and a push-pull output circuit. The high-frequency oscillation circuit and the low-frequency oscillation circuit are both connected to the push-pull output circuit through the high-low frequency switching circuit.

3. The safety protection communication control module for a dual power supply system according to claim 1, characterized in that: It also includes a wireless communication processing module, which includes a processor, a wireless communication module, and a second reverse voltage output circuit and / or a second reverse voltage receiving circuit; the second reverse voltage output circuit and / or the second reverse voltage receiving circuit are also connected in parallel to the ground neutral line; the processor is connected to other devices for wireless communication through the wireless communication module, and the processor triggers the second reverse voltage output module to turn on or off according to the input control information of the wireless communication module. When the second reverse voltage output circuit is turned on, it outputs a reverse voltage to the ground neutral line during the low level period of the pulsed square wave DC power supply on the ground neutral line. The second reverse voltage receiving circuit is turned on when a reverse voltage appears on the ground neutral line. When the second reverse voltage receiving circuit is turned on, it outputs a high level to the processor. The processor processes the high level output by the second reverse voltage receiving circuit into output control information and sends it to other devices through the wireless communication module.

4. The safety protection communication control module for a dual power supply system according to claim 1, characterized in that: The DC trigger protection circuit includes one or more of an over-temperature trigger circuit, a DC manual switch circuit, and an under-voltage trigger circuit.

5. The safety protection communication control module for a dual power supply system according to claim 1, characterized in that: The AC trigger protection circuit includes one or more of a fault trigger circuit, a leakage trigger circuit, an AC manual switch circuit, an over-voltage or under-voltage trigger circuit, and an overload trigger circuit.

6. A safety protection communication control module for a dual power supply system according to claim 5, characterized in that: The fault trigger circuit is a fire linkage alarm module, including an alarm information sending module and an alarm information receiving module. The alarm information sending module and the alarm information receiving module are both connected in parallel to the ground neutral line. The alarm information sending module includes a trigger circuit and a third reverse voltage output circuit. The alarm information receiving module includes a third reverse voltage receiving circuit and a linkage response circuit. The third reverse voltage receiving circuit triggers the linkage response circuit to turn on according to the reverse voltage.

7. The safety protection communication control module for a dual power supply system according to claim 3, characterized in that: The first reverse voltage output circuit and the second reverse voltage output circuit both use an inductor circuit with a trigger conduction circuit.

8. The safety protection communication control module for a dual power supply system according to claim 3, characterized in that: The first reverse voltage receiving circuit and the second reverse voltage receiving circuit both adopt an optocoupler triggered conduction circuit.

9. The safety protection communication control module for a dual power supply system according to claim 6, characterized in that: The trigger circuits of the alarm information sending module are multiple and can trigger the reverse voltage output circuit to output reverse voltages of different voltage values.

10. The safety protection communication control module for a dual power supply system according to claim 6, characterized in that: There are multiple alarm information receiving modules connected in parallel to the ground neutral line. There are multiple reverse voltage receiving circuits of the multiple alarm information receiving modules and they use switch circuits that are triggered to turn on by different reverse voltage values.

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