A water-immersion electric shock protection device

Abstract

The present disclosure provides a water-immersion protection device against electric shock, which belongs to the technical field of electric shock monitoring. The water-immersion protection device against electric shock includes a water-immersion monitoring module, a signal processing module, a controller, a power conversion module and a communication module; the first end of the power conversion module is used to connect to the mains, and the second end of the power conversion module is connected to the controller; the first end of the electric shock protection module is used to connect to the mains, and the second end of the electric shock protection module is used to connect to the power supply end of the electrical equipment; the first end of the water-immersion monitoring module is used to connect to the electrical equipment, and the second end of the water-immersion monitoring module is connected to the controller through the signal processing module, and the second end of the water-immersion monitoring module is connected to the control end of the electric shock protection module; the controller is connected to the monitoring platform through the communication module. The present disclosure can solve the problem of lack of effective countermeasures when electrical equipment is flooded.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electric shock monitoring, and in particular to a water-immersion electric shock protection device. Background Art

[0002] With the continuous advancement of science and technology and the improvement of people's living standards, the popularity and application of electrical equipment are becoming more and more extensive, but the resulting electrical safety issues are also becoming increasingly prominent. Especially in humid or watery environments, electric shock accidents caused by electrical equipment immersion in water occur frequently, which not only poses a serious threat to people's lives and property safety, but also causes huge economic losses to society. Traditional electrical safety protection measures mainly focus on the monitoring and protection of electrical parameters such as overcurrent and overvoltage, but often lack effective countermeasures for the special situation of immersion in water. Utility Model Content

[0003] The embodiments of the present disclosure provide a water immersion protection device for electric shock prevention to solve the problem of lack of effective countermeasures when electrical equipment is immersed in water.

[0004] In a first aspect, an embodiment of the present disclosure provides a water immersion protection device against electric shock, including a water immersion monitoring module, a signal processing module, a controller, a power conversion module and a communication module;

[0005] The first end of the power conversion module is used to connect to the mains, and the second end of the power conversion module is connected to the controller;

[0006] The first end of the electric shock protection module is used to connect to the mains, and the second end of the electric shock protection module is used to connect to the power supply end of the electrical equipment;

[0007] The first end of the water immersion monitoring module is used to connect to the electrical equipment, the second end of the water immersion monitoring module is connected to the controller through the signal processing module, and the second end of the water immersion monitoring module is connected to the control end of the electric shock protection module;

[0008] The controller is communicatively connected with the monitoring platform via the communication module.

[0009] In an exemplary embodiment of the present disclosure, the water immersion protection device against electric shock further includes a field alarm module, a battery and a power switching module;

[0010] The second end of the power conversion module is connected to the battery;

[0011] The second end of the power conversion module is connected to the first end of the power switching module, the first end of the power switching module is connected to the battery, and the second end of the power switching module is respectively connected to the controller and the on-site alarm module;

[0012] The controller is connected to the on-site alarm module.

[0013] In an exemplary embodiment of the present disclosure, the water intrusion monitoring module includes a transformer T1, a varistor RP1, a voltage regulator U1, a transistor Q1, a thyristor Q3 and a relay K1;

[0014] The first end of the first input coil of the transformer T1 is used to connect to the live wire of the mains, and the second end of the first input coil of the transformer T1 is connected to the electrical device through the first switch of the relay K1;

[0015] The first end of the second input coil of the transformer T1 is used to connect to the neutral line of the mains, and the second end of the second input coil of the transformer T1 is connected to the electrical device through the second switch of the relay K1;

[0016] The first end of the output coil of the transformer T1 is connected to the sliding end of the variable resistor RP1, the mains is connected to the first end of the variable resistor RP1 through a power supply circuit, the second end of the variable resistor RP1 is grounded, and the second end of the output coil of the transformer T1 is connected to the base of the transistor Q1;

[0017] The first end of the variable resistor RP1 is connected to the input end of the voltage regulator U1, the output end of the voltage regulator U1 is connected to the collector of the transistor Q1, the emitter of the transistor Q1 is connected to the control electrode of the thyristor, the first anode of the thyristor Q3 is connected to the second end of the first input coil of the transformer T1, the second anode of the thyristor Q3 is connected to the first input end of the relay K1, and the second input end of the relay K1 is connected to the second end of the second input coil of the transformer T1;

[0018] The emitter of the transistor Q1 is connected to the controller through the signal processing module.

[0019] In an exemplary embodiment of the present disclosure, the power supply circuit includes a transformer T2, a rectifier bridge U3 and a capacitor C3;

[0020] The first input end of the transformer T2 is connected to the live wire, the second input end of the transformer T2 is connected to the neutral wire, the first output end of the transformer T2 is connected to the first input end of the rectifier bridge U3, the second output end of the transformer T2 is connected to the second input end of the rectifier bridge U3, the first output end of the rectifier bridge U3 is connected to the second output end of the rectifier bridge U3 through the capacitor C3, and the first output end of the rectifier bridge U3 is connected to the first end of the variable resistor RP1.

[0021] In an exemplary embodiment of the present disclosure, the signal processing module includes a transistor Q2, a resistor R4 and a capacitor C2;

[0022] The base of the transistor Q2 is connected to the emitter of the transistor Q1, the collector of the transistor Q2 is connected to the VCC power supply, the emitter of the transistor Q2 is grounded through the resistor R4, the capacitor C2 is connected in parallel across the resistor R4, and the emitter of the transistor Q2 is connected to the controller.

[0023] In an exemplary embodiment of the present disclosure, the signal processing module further includes an optical coupler U2 and a resistor R5;

[0024] The first input end of the optocoupler U2 is connected to the emitter of the transistor Q1, the second input end of the optocoupler U2 is grounded through the resistor R5, the first input end of the optocoupler U2 is connected to the VCC power supply, and the second output end of the optocoupler U2 is connected to the base of the transistor Q2.

[0025] In an exemplary embodiment of the present disclosure, the on-site alarm module includes a transistor Q4, a resistor R9, a transistor Q5 and an alarm B1;

[0026] The base of the transistor Q4 is connected to the controller, the collector of the transistor Q4 is connected to the power switching module through the resistor R9, the emitter of the transistor Q4 is connected to the base of the transistor Q5, the collector of the transistor Q5 is connected to the first end of the alarm B1, the second end of the alarm B1 is connected to the power switching module, and the emitter of the transistor Q5 is grounded.

[0027] The beneficial effects of the water-immersion electric shock protection device provided by the embodiment of the present disclosure are:

[0028] The disclosed embodiment can monitor the flooding of the environment around the electrical equipment in real time. Once flooding is detected, the power supply can be quickly cut off to effectively prevent electric shock accidents, thereby ensuring the safety of personnel and equipment. At the same time, the disclosed embodiment has a remote communication function, which can transmit flooding information to the monitoring platform in real time, so that management personnel can understand and handle flooding incidents in a timely manner, thereby improving safety management efficiency. In addition, the disclosed embodiment is compact in design, easy to install and maintain, and can be applied to various power environments, providing comprehensive anti-electric shock protection for various electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, 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 disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1It is a structural block diagram of a water immersion electric shock protection device provided by an embodiment of the present disclosure;

[0031] Figure 2 is a circuit schematic diagram provided by an embodiment of the present disclosure;

[0032] Figure 3 It is a circuit schematic diagram provided by another embodiment of the present disclosure. DETAILED DESCRIPTION

[0033] In order to enable people in the technical field to better understand the present solution, the technical solution in the embodiment of the present solution will be clearly described below in conjunction with the drawings in the embodiment of the present solution. Obviously, the described embodiment is an embodiment of a part of the present solution, not all of the embodiments. Based on the embodiments in the present solution, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present solution.

[0034] The term "including" and any other variations in the specification and claims of this solution and the above drawings mean "including but not limited to", and is intended to cover non-exclusive inclusions and is not limited to the examples listed in the text. In addition, the terms "first" and "second" are used to distinguish different objects, not to describe a specific order.

[0035] The following is a detailed description of the implementation of the present disclosure in conjunction with the specific drawings:

[0036] Figure 1 This is a schematic diagram of the structure of a water-immersion electric shock protection device provided by an embodiment of the present disclosure. Figure 1 , the water immersion protection device against electric shock includes a water immersion monitoring module, a signal processing module, a controller, a power conversion module and a communication module;

[0037] The first end of the power conversion module is used to connect to the mains, and the second end of the power conversion module is connected to the controller;

[0038] The first end of the electric shock protection module is used to connect to the mains, and the second end of the electric shock protection module is used to connect to the power supply end of the electrical equipment;

[0039] The first end of the water immersion monitoring module is used to connect to the electrical equipment, the second end of the water immersion monitoring module is connected to the controller through the signal processing module, and the second end of the water immersion monitoring module is connected to the control end of the contact protection module;

[0040] The controller is connected to the monitoring platform through the communication module.

[0041] In this embodiment, the water-immersion protection device is designed to ensure that the power supply is quickly cut off when the electrical equipment is accidentally immersed in water, to prevent electric shock accidents, and to improve safety through remote monitoring.

[0042] The power conversion module is responsible for converting the mains power into a suitable power supply to the controller. The water immersion monitoring module is used to monitor whether the electrical equipment is flooded in real time. Once the humidity around the equipment is detected to exceed the preset threshold or directly contact with water, a signal is sent immediately. The second end of the water immersion monitoring module is connected to the signal processing module to convert the monitored information into a signal recognizable by the controller. The signal processing module will receive the original signal from the water immersion monitoring module and perform necessary processing to convert the electrical signal output by the water immersion monitoring module into a range acceptable to the controller. The processed signal is forwarded to the controller so that the controller can make a decision.

[0043] The mains is connected to the electrical equipment through the electric shock protection module. When the electrical equipment is working normally, the mains can provide working power to the electrical equipment through the electric shock protection module. When the water immersion monitoring module detects that the electrical equipment has leakage or short circuit due to water immersion, it converts the situation into an electrical signal and sends it to the controller. At the same time, the electrical signal output by the water immersion monitoring module is used to control the electric shock protection module. When the electric shock protection module receives the electrical signal, it responds by disconnecting the connection between the mains and the electrical equipment to avoid the risk of electric shock.

[0044] The controller can exchange data with the remote monitoring platform through the communication module. Once the electrical equipment is flooded or in an abnormal situation, the controller will send an alarm message to the monitoring platform through the communication module, so that timely measures can be taken. This helps to improve the efficiency of safety management, especially for remote or difficult to monitor directly.

[0045] From the above, it can be concluded that the present embodiment can monitor the water immersion in the environment around the electrical equipment in real time. Once water immersion is detected, the power supply can be quickly cut off to effectively prevent the occurrence of electric shock accidents, thereby ensuring the safety of personnel and equipment. At the same time, the present embodiment has a remote communication function, which can transmit the water immersion information to the monitoring platform in real time, so that the management personnel can understand and deal with the water immersion incident in time, thereby improving the efficiency of safety management. In addition, the device is compact in design, easy to install and maintain, and can be applied to various power consumption environments, providing comprehensive anti-electric shock protection for various electrical equipment. Real-time monitoring and rapid response to the water immersion of electrical equipment effectively improves the safety level of electricity use and provides important safety guarantees for homes, industries and public facilities.

[0046] like Figure 1 As shown, in one embodiment of the present disclosure, it also includes a field alarm module, a battery and a power switching module; the second end of the power conversion module is connected to the battery; the second end of the power conversion module is connected to the first end of the power switching module, the first end of the power switching module is connected to the battery, and the second end of the power switching module is respectively connected to the controller and the field alarm module; the controller is connected to the field alarm module.

[0047] In this embodiment, when the flood monitoring module detects a flood event, in addition to sending an alarm to the remote monitoring platform through the communication module, the on-site alarm module will also be activated. The on-site alarm module may include an audible and visual alarm that can immediately send out an obvious warning signal locally to attract the attention of on-site personnel, so that emergency measures can be taken quickly to effectively prevent or reduce potential damage.

[0048] The power conversion module is not only directly connected to the mains, but also connected to the battery. When the electrical equipment is flooded, the electric shock protection module will cut off the connection between the mains and the electrical equipment. In this embodiment, the working power of the controller and the on-site alarm module is converted from the mains. When the mains is disconnected, in order to ensure that the on-site alarm module can continue to send out an alarm signal to remind the on-site personnel, the controller and the on-site alarm module need to continue to work.

[0049] For this purpose, the present embodiment adds a battery. When the electric equipment is working, the city power can convert the 220V AC voltage into a charging voltage suitable for the battery through the power conversion module to charge the battery. When the electric equipment is flooded, the battery can be used as the working power supply of the controller and the on-site alarm module.

[0050] Among them, the power switching module is used to monitor the voltage of the AC power and realize the switching between the AC power and the battery. When it is detected that the AC power is disconnected, the power switching module automatically switches to battery power supply, ensuring the smooth conversion of the entire device between different power sources and avoiding the safety protection failure caused by power supply interruption.

[0051] In this embodiment, by adding an on-site alarm module, a battery and a power switching module, the emergency response capability and reliability of the water-immersion anti-electric shock protection device are significantly improved, ensuring that alarms can still be effectively sent to on-site personnel and remote monitoring platforms in various emergency situations, thereby maximizing the protection of personal safety and property safety.

[0052] like Figure 2As shown, in one embodiment of the present disclosure, the water infiltration monitoring module includes a transformer T1, a variable resistor RP1, a voltage stabilizer U1, a transistor Q1, a thyristor Q3 and a relay K1; the first end of the first input coil of the transformer T1 is used to connect the live wire of the mains, and the second end of the first input coil of the transformer T1 is connected to the electrical equipment through the first switch of the relay K1; the first end of the second input coil of the transformer T1 is used to connect the neutral wire of the mains, and the second end of the second input coil of the transformer T1 is connected to the electrical equipment through the second switch of the relay K1; the first end of the output coil of the transformer T1 is connected to the sliding end of the variable resistor RP1, and the mains is connected to the power supply circuit The first end of the variable resistor RP1 is connected, the second end of the variable resistor RP1 is grounded, and the second end of the output coil of the transformer T1 is connected to the base of the transistor Q1; the first end of the variable resistor RP1 is connected to the input end of the voltage regulator U1, the output end of the voltage regulator U1 is connected to the collector of the transistor Q1, the emitter of the transistor Q1 is connected to the control electrode of the thyristor, the first anode of the thyristor Q3 is connected to the second end of the first input coil of the transformer T1, the second anode of the thyristor Q3 is connected to the first input end of the relay K1, and the second input end of the relay K1 is connected to the second end of the second input coil of the transformer T1; the emitter of the transistor Q1 is connected to the controller through the signal processing module.

[0053] In this embodiment, a specific implementation circuit of a flood monitoring module is provided, wherein the transformer T1 is composed of three coils, including two input coils L1 and L2, and one output coil L3, and the two input coils L1 and L2 are formed by winding two wires in parallel. Switch K1-1 and switch K1-2 are two action switches of relay K1, and relay K1 is an AC relay. Switch K1-1 and switch K1-2 are both normally closed switches.

[0054] The mains electricity generates a DC voltage suitable for the water monitoring module through the power supply circuit. When the electrical equipment is not flooded, the current flowing through the coil L1 and the current flowing through the coil L2 are equal, and the magnetic flux generated is also equal, but in opposite directions. After canceling each other, the voltage generated on the output coil L3 of the transformer T1 is 0. The transistor Q1 is cut off, the emitter of the transistor Q1 outputs a low level, the control pole of the thyristor Q3 is a low level, the thyristor Q3 is cut off, and the relay K1 does not work. At this time, the electrical equipment can work normally.

[0055] When electrical equipment is immersed in water, a short circuit will occur between the electrical equipment and the ground, that is, a current will be generated between the surface of the electrical equipment and the ground, which will cause a difference in current between the two input coils of the transformer T1, thereby causing a voltage to be generated on the output coil L3 of the transformer T1. This voltage causes the transistor Q1 to turn on, and the DC voltage generated by the power supply circuit is stabilized by the voltage regulator U1 and added to the collector of the transistor Q1. At this time, the voltage output by the emitter of the transistor Q1 is approximately equal to the collector voltage of the transistor Q1. This voltage is also added to the control electrode of the thyristor Q3, and the thyristor Q3 is turned on, and the relay K1 is energized and closed, that is, the two control switches K1-1 and K1-2 corresponding to the relay K1 are disconnected, cutting off the connection between the mains and the electrical equipment to avoid the risk of electric shock.

[0056] At the same time, the electrical signal of the emitter of the transistor Q1 is converted into an electrical signal suitable for the controller through the signal processing module and sent to the controller.

[0057] like Figure 2 As shown, in one embodiment of the present disclosure, the power supply circuit includes a transformer T2, a rectifier bridge U3 and a capacitor C3; the first input end of the transformer T2 is connected to the live wire, the second input end of the transformer T2 is connected to the neutral wire, the first output end of the transformer T2 is connected to the first input end of the rectifier bridge U3, the second output end of the transformer T2 is connected to the second input end of the rectifier bridge U3, the first output end of the rectifier bridge U3 is connected to the second output end of the rectifier bridge U3 through the capacitor C3, and the first output end of the rectifier bridge U3 is connected to the first end of the variable resistor RP1.

[0058] In this embodiment, the power supply circuit is used to convert the mains power into the DC working power required by the water intrusion monitoring module. The transformer T2 is used to convert the 220V AC signal provided by the mains power into a low-voltage AC signal, the rectifier bridge U3 is used to convert the low-voltage AC signal output by the transformer T2 into pulsed DC power, and finally, the capacitor C3 is used to convert the pulsating DC power output by the rectifier bridge into a DC signal.

[0059] like Figure 2 As shown, in one embodiment of the present disclosure, the signal processing module includes a transistor Q2, a resistor R4 and a capacitor C2; the base of the transistor Q2 is connected to the emitter of the transistor Q1, the collector of the transistor Q2 is connected to the VCC power supply, the emitter of the transistor Q2 is grounded through the resistor R4, the capacitor C2 is connected in parallel across the resistor R4, and the emitter of the transistor Q2 is connected to the controller.

[0060] In this embodiment, when the electrical equipment is flooded, the voltage output by the emitter of transistor Q1 is relatively large. If it is directly added to the controller, the controller may be directly burned. Therefore, it needs to be converted into a suitable voltage. The transistor Q2 and the resistor R4 constitute a signal processing circuit, wherein the resistor R11 and the resistor R12 constitute a voltage divider circuit, which is used to reduce the emitter voltage of the transistor Q1. The reduced voltage is added to the base of the transistor Q2, and the transistor Q2 is turned on. At this time, the voltage on the resistor R4 is approximately equal to VCC. In this embodiment, the VCC voltage can be 3.3V. When the electrical equipment is not flooded, the emitter voltage of the transistor Q1 is 0, the transistor Q2 is turned off, and the voltage on the resistor R4 is 0. Therefore, the controller can determine whether the electrical equipment is flooded according to the voltage on the resistor R4. The capacitor C2 is used to play a filtering role to ensure that the electrical signal received by the controller is more stable.

[0061] like Figure 2 As shown, in one embodiment of the present disclosure, the signal processing module also includes an optocoupler U2 and a resistor R5; the first input end of the optocoupler U2 is connected to the emitter of the transistor Q1, the second input end of the optocoupler U2 is grounded through the resistor R5, the first input end of the optocoupler U2 is connected to the VCC power supply, and the second output end of the optocoupler U2 is connected to the base of the transistor Q2.

[0062] In this embodiment, the signal processing module also includes an optical coupler U2, which is used to isolate the signal so that when the water immersion electric shock protection device is used in a relatively complex environment, the electrical signal received by the controller is not affected by the working environment, thereby improving the stability of the circuit operation.

[0063] like Figure 3 As shown, in one embodiment of the present disclosure, the on-site alarm module includes a transistor Q4, a resistor R9, a transistor Q5 and an alarm B1; the base of the transistor Q4 is connected to the controller, the collector of the transistor Q4 is connected to the power switching module through the resistor R9, the emitter of the transistor Q4 is connected to the base of the transistor Q5, the collector of the transistor Q5 is connected to the first end of the alarm B1, the second end of the alarm B1 is connected to the power switching module, and the emitter of the transistor Q5 is grounded.

[0064] In this embodiment, the on-site alarm module is used to serve as an on-site alarm. When electrical equipment is flooded, it can immediately send out an obvious warning signal locally to attract the attention of on-site personnel, so that emergency measures can be taken quickly to effectively prevent or reduce potential damage.

[0065] The working principle of the on-site alarm module is as follows: when the electrical equipment is flooded, the controller sends a high-level signal, transistor Q4 is turned on, the emitter of transistor Q4 outputs a high level, transistor Q5 is turned on, alarm B1 is powered on, and an alarm signal is sent out. When the electrical equipment is not flooded, the controller outputs a low level to the base of transistor Q4, transistors Q4 and Q5 are both turned off, and alarm B1 does not work.

[0066] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A water-immersion electric shock protection device, characterized in that: It includes a water immersion monitoring module, a signal processing module, a controller, a power conversion module and a communication module; The first end of the power conversion module is used to connect to the mains, and the second end of the power conversion module is connected to the controller; The first end of the electric shock protection module is used to connect to the mains, and the second end of the electric shock protection module is used to connect to the power supply end of the electrical equipment; The first end of the water immersion monitoring module is used to connect to the electrical equipment, the second end of the water immersion monitoring module is connected to the controller through the signal processing module, and the second end of the water immersion monitoring module is connected to the control end of the electric shock protection module; The controller is communicatively connected with the monitoring platform via the communication module.

2. A water-immersion electric shock protection device as claimed in claim 1, characterized in that: It also includes a field alarm module, a battery and a power switching module; The second end of the power conversion module is connected to the battery; The second end of the power conversion module is connected to the first end of the power switching module, the first end of the power switching module is connected to the battery, and the second end of the power switching module is respectively connected to the controller and the on-site alarm module; The controller is connected to the on-site alarm module.

3. A water-immersion electric shock protection device as claimed in claim 1, characterized in that: The water intrusion monitoring module includes a transformer T1, a variable resistor RP1, a voltage stabilizer U1, a transistor Q1, a thyristor Q3 and a relay K1; The first end of the first input coil of the transformer T1 is used to connect to the live wire of the mains, and the second end of the first input coil of the transformer T1 is connected to the electrical device through the first switch of the relay K1; The first end of the second input coil of the transformer T1 is used to connect to the neutral line of the mains, and the second end of the second input coil of the transformer T1 is connected to the electrical device through the second switch of the relay K1; The first end of the output coil of the transformer T1 is connected to the sliding end of the variable resistor RP1, the mains is connected to the first end of the variable resistor RP1 through a power supply circuit, the second end of the variable resistor RP1 is grounded, and the second end of the output coil of the transformer T1 is connected to the base of the transistor Q1; The first end of the variable resistor RP1 is connected to the input end of the voltage regulator U1, the output end of the voltage regulator U1 is connected to the collector of the transistor Q1, the emitter of the transistor Q1 is connected to the control electrode of the thyristor, the first anode of the thyristor Q3 is connected to the second end of the first input coil of the transformer T1, the second anode of the thyristor Q3 is connected to the first input end of the relay K1, and the second input end of the relay K1 is connected to the second end of the second input coil of the transformer T1; The emitter of the transistor Q1 is connected to the controller through the signal processing module.

4. A water-immersion electric shock protection device as claimed in claim 3, characterized in that: The power supply circuit includes a transformer T2, a rectifier bridge U3 and a capacitor C3; The first input end of the transformer T2 is connected to the live wire, the second input end of the transformer T2 is connected to the neutral wire, the first output end of the transformer T2 is connected to the first input end of the rectifier bridge U3, the second output end of the transformer T2 is connected to the second input end of the rectifier bridge U3, the first output end of the rectifier bridge U3 is connected to the second output end of the rectifier bridge U3 through the capacitor C3, and the first output end of the rectifier bridge U3 is connected to the first end of the variable resistor RP1.

5. The water-immersion electric shock protection device according to claim 3, characterized in that: The signal processing module includes a transistor Q2, a resistor R4 and a capacitor C2; The base of the transistor Q2 is connected to the emitter of the transistor Q1, the collector of the transistor Q2 is connected to the VCC power supply, the emitter of the transistor Q2 is grounded through the resistor R4, the capacitor C2 is connected in parallel across the resistor R4, and the emitter of the transistor Q2 is connected to the controller.

6. A water-immersion electric shock protection device as claimed in claim 5, characterized in that: The signal processing module also includes an optical coupler U2 and a resistor R5; The first input end of the optocoupler U2 is connected to the emitter of the transistor Q1, the second input end of the optocoupler U2 is grounded through the resistor R5, the first input end of the optocoupler U2 is connected to the VCC power supply, and the second output end of the optocoupler U2 is connected to the base of the transistor Q2.

7. A water-immersion electric shock protection device as claimed in claim 2, characterized in that: The on-site alarm module includes a transistor Q4, a resistor R9, a transistor Q5 and an alarm B1; The base of the transistor Q4 is connected to the controller, the collector of the transistor Q4 is connected to the power switching module through the resistor R9, the emitter of the transistor Q4 is connected to the base of the transistor Q5, the collector of the transistor Q5 is connected to the first end of the alarm B1, the second end of the alarm B1 is connected to the power switching module, and the emitter of the transistor Q5 is grounded.

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