Leakage protection system
By designing the main control module to manage the various modules of the leakage protection system, the complex wiring of existing devices is solved, and the leakage protection effect with fast response and complete functions is achieved.
Patent Information
- Application Number
- CN202422223798.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-11
AI Technical Summary
The existing leakage protection devices lack main control devices, resulting in complex wiring and inability to effectively control alarms and power-off circuits.
A leakage protection system including a main control module is designed, and the luminous alarm module, whistle alarm module and switch control module are comprehensively controlled to realize the unified management of leakage signals.
Simplified wiring, achieved full-featured leakage protection, can quickly respond and cut off power, preventing dangers such as electric shock and fire.
Smart Images
Figure CN223156695U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of safety protection, and specifically to a leakage protection system. Background Art
[0002] Leakage may cause current to pass through the human body, resulting in electric shock accidents, and in severe cases, it will endanger life. The leakage protection device can quickly cut off the power supply when detecting leakage, thus avoiding or reducing the occurrence of electric shock accidents and protecting the life safety of personnel. Long-term leakage may not only cause equipment damage, but also lead to serious consequences such as fires. Leakage protection can timely cut off the faulty circuit, prevent the equipment from being damaged due to continuous leakage, and at the same time reduce the risk of safety accidents such as fires. Leakage will cause uneven current distribution in the electrical system, affecting the normal operation of electrical equipment. The role of the leakage protection device is to timely detect and handle leakage problems, which helps to maintain the stability and reliability of the electrical system.
[0003] The existing leakage protection often controls power off based on leakage signals and lacks a main control device, resulting in the need for corresponding control circuits for related alarm circuits and power-off circuits, leading to complex wiring and the need for improvement. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a leakage protection system to solve the problems raised in the above background art.
[0005] To achieve the above purpose, the utility model provides the following technical solutions:
[0006] A leakage protection system, comprising:
[0007] A main control module for comprehensively controlling the operation of each module;
[0008] A leakage detection module for detecting whether the line or the electrical equipment is leaking, and when leaking, feeding back a leakage signal to the main control module;
[0009] A light-emitting alarm module for receiving the control of the main control module and selecting whether to control the light-emitting diode to emit light based on whether there is leakage;
[0010] A beeping alarm module for receiving the control of the main control module and selecting whether to beep to prompt leakage based on whether there is leakage;
[0011] A switch control module for receiving the control of the main control module and selecting whether to control the switch of the circuit where the electrical equipment is located to be turned off or not based on whether there is leakage;
[0012] The leakage detection module is connected to the main control module, and the main control module is connected to the light-emitting alarm module, the beeping alarm module, and the switch control module.
[0013] As a further solution of the present utility model: The main control module includes a chip U1. The 15th pin of the chip U1 is connected to the light-emitting alarm module. The 45th pin of the chip U1 is connected to the buzzer alarm module. The 39th pin of the chip U1 is connected to the switch control module. Any idle IO port (such as PA and PB pins) of the chip U1 is connected to the leakage detection module. The model of the chip U1 is STM32F103CXX.
[0014] As a further solution of the present utility model: The leakage detection module includes a current transformer ZCT, a capacitor C1, rectifiers D1-D4, and a capacitor C2. The live wire L1 and the neutral wire L2 pass through the current transformer ZCT and an electrical load to form a loop. A switch K1 is provided in the loop. One end of the output terminal of the current transformer ZCT is connected to one end of the capacitor C1 and the first ends of the rectifiers D1-D4. The other end of the output terminal of the current transformer ZCT is connected to the other end of the capacitor C1 and the third ends of the rectifiers D1-D4. The second ends of the rectifiers D1-D4 are grounded. The fourth ends of the rectifiers D1-D4 are connected to one end of the capacitor C2 and the control pole of a thyristor. The other end of the capacitor C2 is grounded. The thyristor feeds back a signal to the main control module.
[0015] As a further solution of the present utility model: The light-emitting alarm module includes a light-emitting diode LED3 and a resistor R18. The positive pole of the light-emitting diode LED3 is connected to the main control module. The negative pole of the light-emitting diode LED3 is connected to one end of the resistor R18. The other end of the resistor R18 is grounded.
[0016] As a further solution of the present utility model: The buzzer alarm module includes a resistor R11, a resistor R12, a triode Q1, and a buzzer BEEP1. One end of the resistor R11 is connected to the main control module. The other end of the resistor R11 is connected to one end of the resistor R12 and the base of the triode Q1. The other end of the resistor R12 is grounded. The emitter of the triode Q1 is grounded. The collector of the triode Q1 is connected to one end of the buzzer BEEP1. The other end of the buzzer BEEP1 is connected to a 3.3V voltage.
[0017] As a further solution of the present utility model: The switch control module includes a resistor R1, a triode Q2, a diode D5, and a relay J1. One end of the resistor R1 is connected to the main control module. The other end of the resistor R1 is connected to the base of the triode Q2. The emitter of the triode Q2 is grounded. The collector of the triode Q2 is connected to one end of the relay J1 and the positive pole of the diode D5. The negative pole of the diode D5 is connected to the other end of the relay J1 and a 12V voltage.
[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows: By designing the main control module, the present utility model controls the operation of modules such as the light-emitting alarm module, the buzzer alarm module, and the switch control module based on whether the leakage detection module sends a leakage signal. The control is all from the main control module, which is convenient for wiring and has complete functions. Description of the Drawings
[0019] Figure 1 It is the circuit diagram of the main control module.
[0020] Figure 2 It is the circuit diagram of the leakage detection module.
[0021] Figure 3 It is the circuit diagram of the light-emitting alarm module.
[0022] Figure 4 It is the circuit diagram of the buzzer alarm module.
[0023] Figure 5 It is the circuit diagram of the switch control module. Detailed Implementation Manner
[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0025] Please refer to Figures 1 to 5 , a leakage protection system, including:
[0026] A main control module for comprehensively controlling the operation of each module;
[0027] A leakage detection module for detecting whether the line or the electrical equipment is leaking. When there is a leakage, it feeds back a leakage signal to the main control module;
[0028] A light-emitting alarm module for receiving the control of the main control module and selecting whether to control the light-emitting diode to emit light based on whether there is a leakage;
[0029] A buzzer alarm module for receiving the control of the main control module and selecting whether to give a buzzer prompt for leakage based on whether there is a leakage;
[0030] A switch control module for receiving the control of the main control module and selecting whether to control the switch of the circuit where the electrical equipment is located to be turned off or on based on whether there is a leakage;
[0031] The leakage detection module is connected to the main control module, and the main control module is connected to the light-emitting alarm module, the buzzer alarm module, and the switch control module.
[0032] In this embodiment: Please refer to Figure 1, the main control module includes chip U1. The 15th pin of chip U1 is connected to the light-emitting alarm module, the 45th pin of chip U1 is connected to the buzzer alarm module, the 39th pin of chip U1 is connected to the switch control module, any idle IO port (such as PA and PB pins) of chip U1 is connected to the leakage detection module, and the model of chip U1 is STM32F103CXX.
[0033] Based on different pins, chip U1 receives leakage signals respectively and controls the operation of the light-emitting alarm module, the buzzer alarm module, and the switch control module.
[0034] The main control chip STM32F103 is a high-performance 32-bit microcontroller (MCU) based on the ARM Cortex-M3 core, launched by ST (STMicroelectronics). This chip is designed to meet the requirements of the embedded field for high performance, low power consumption, and real-time processing capabilities. It is responsible for receiving and processing signals from the leakage protector. When leakage occurs, it will immediately control the cutting off of the input relay switch and issue an alarm.
[0035] In this embodiment: Please refer to Figure 2 , the leakage detection module includes current transformer ZCT, capacitor C1, rectifiers D1-D4, capacitor C2. The live wire L1 and the neutral wire L2 pass through the current transformer ZCT and the electrical load to form a loop. A switch K1 is set in the loop. One end of the output terminal of the current transformer ZCT is connected to one end of the capacitor C1 and the first end of the rectifiers D1-D4. The other end of the output terminal of the current transformer ZCT is connected to the other end of the capacitor C1 and the third end of the rectifiers D1-D4. The second ends of the rectifiers D1-D4 are grounded. The fourth ends of the rectifiers D1-D4 are connected to one end of the capacitor C2 and the control pole of a thyristor. The other end of the capacitor C2 is grounded. The thyristor feeds back a signal to the main control module.
[0036] The current starts from the live wire L1, flows through the electrical load, and then returns to the neutral wire L2. Since the currents flowing through the current transformer ZCT by the live wire L1 and the neutral wire L2 are equal in magnitude and opposite in direction, the vector sum of the currents in the current transformer ZCT is zero. At this time, there is no residual current in the primary coil, and the secondary coil will not be induced, and no leakage signal will be fed back to the main control module.
[0037] When there is leakage in the line or electrical equipment or someone gets an electric shock, part of the current will be shunted from the fault point, resulting in an imbalance in the currents flowing into and out of the current transformer ZCT (the vector sum of the currents is not zero). At this time, a residual current is generated in the primary coil, inducing the secondary coil. After passing through the capacitor C1 and the rectifiers D1-D4, the thyristor Z1 can be triggered to conduct, and a leakage signal is fed back to the main control module. This process is usually completed within milliseconds to prevent dangerous situations such as electric shock or fire at the fastest speed.
[0038] In this embodiment: Please refer to Figure 3 , the light-emitting alarm module includes an LED3 and a resistor R18. The positive electrode of the LED3 is connected to the main control module, the negative electrode of the LED3 is connected to one end of the resistor R18, and the other end of the resistor R18 is grounded.
[0039] After the chip U1 receives the leakage signal, the 15th pin of the chip U1 sends a high level to drive the LED3 to emit light, indicating leakage.
[0040] In this embodiment: Please refer to Figure 4 , the beeping alarm module includes a resistor R11, a resistor R12, a triode Q1, and a buzzer BEEP1. One end of the resistor R11 is connected to the main control module, the other end of the resistor R11 is connected to one end of the resistor R12 and the base of the triode Q1, the other end of the resistor R12 is grounded, the emitter of the triode Q1 is grounded, the collector of the triode Q1 is connected to one end of the buzzer BEEP1, and the other end of the buzzer BEEP1 is connected to a 3.3V voltage.
[0041] After the chip U1 receives the leakage signal, the 45th pin of the chip U1 sends a high level to drive the triode Q1 to conduct, and then the buzzer BEEP1 conducts to give a beeping prompt.
[0042] In this embodiment: Please refer to Figure 5 , the switch control module includes a resistor R1, a triode Q2, a diode D5, and a relay J1. One end of the resistor R1 is connected to the main control module, the other end of the resistor R1 is connected to the base of the triode Q2, the emitter of the triode Q2 is grounded, the collector of the triode Q2 is connected to one end of the relay J1 and the positive electrode of the diode D5, and the negative electrode of the diode D5 is connected to the other end of the relay J1 and a 12V voltage.
[0043] After the chip U1 receives the leakage signal, the 39th pin of the chip U1 sends a high level to drive the triode Q2 to conduct. After the triode Q2 conducts, the loop where the relay J1 is located conducts, and the relay J1 controls the switch K1 to bounce open, disconnecting the loop between the electrical load and the live wire L1 and the neutral wire L2 to protect the safety of the circuit.
[0044] The working principle of the present utility model is: The main control module is used to comprehensively control the operation of each module; the leakage detection module is used to detect whether the line or the electrical equipment is leaking. When there is a leakage, it feeds back the leakage signal to the main control module; the light-emitting alarm module is used to receive the control of the main control module and select whether to control the LED to emit light based on whether there is a leakage; the beeping alarm module is used to receive the control of the main control module and select whether to beep to prompt leakage based on whether there is a leakage; the switch control module is used to receive the control of the main control module and select whether to control the switch of the loop where the electrical equipment is located to be disconnected based on whether there is a leakage.
[0045] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting.
[0046] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A leakage protection system, characterized in that, The leakage protection system includes: A main control module for comprehensively controlling the operation of each module; A leakage detection module for detecting whether the line or electrical equipment is leaking. When there is a leakage, it feeds back a leakage signal to the main control module; A light-emitting alarm module for receiving the control of the main control module and choosing whether to control the light-emitting diode to emit light based on whether there is a leakage; A beeping alarm module for receiving the control of the main control module and choosing whether to beep to prompt leakage based on whether there is a leakage; A switch control module for receiving the control of the main control module and choosing whether to control the switch of the circuit where the electrical equipment is located to be turned off or on based on whether there is a leakage; The leakage detection module is connected to the main control module, and the main control module is connected to the light-emitting alarm module, the beeping alarm module, and the switch control module.
2. The leakage protection system according to claim 1, characterized in that, The main control module includes a chip U1. The 15th pin of the chip U1 is connected to the light-emitting alarm module, the 45th pin of the chip U1 is connected to the beeping alarm module, the 39th pin of the chip U1 is connected to the switch control module, any idle IO port of the chip U1 is connected to the leakage detection module, and the model of the chip U1 is STM32F103CXX.
3. The leakage protection system according to claim 2, characterized in that, The leakage detection module includes a current transformer ZCT, a capacitor C1, rectifiers D1-D4, and a capacitor C2. The live wire L1 and the neutral wire L2 pass through the current transformer ZCT and the electrical load to form a loop. A switch K1 is set in the loop. One end of the output terminal of the current transformer ZCT is connected to one end of the capacitor C1 and the first ends of the rectifiers D1-D4. The other end of the output terminal of the current transformer ZCT is connected to the other end of the capacitor C1 and the third ends of the rectifiers D1-D4. The second ends of the rectifiers D1-D4 are grounded. The fourth ends of the rectifiers D1-D4 are connected to one end of the capacitor C2 and the control electrode of a thyristor. The other end of the capacitor C2 is grounded. The thyristor feeds back a signal to the main control module.
4. The leakage protection system according to claim 2, characterized in that, The light-emitting alarm module includes a light-emitting diode LED3 and a resistor R18. The positive electrode of the light-emitting diode LED3 is connected to the main control module. The negative electrode of the light-emitting diode LED3 is connected to one end of the resistor R18, and the other end of the resistor R18 is grounded.
5. The leakage protection system according to claim 2, characterized in that, The beeping alarm module includes a resistor R11, a resistor R12, a triode Q1, and a buzzer BEEP1. One end of the resistor R11 is connected to the main control module. The other end of the resistor R11 is connected to one end of the resistor R12 and the base of the triode Q1. The other end of the resistor R12 is grounded. The emitter of the triode Q1 is grounded. The collector of the triode Q1 is connected to one end of the buzzer BEEP1, and the other end of the buzzer BEEP1 is connected to a 3.3V voltage.
6. The leakage protection system according to claim 2, characterized in that, The switch control module includes a resistor R1, a triode Q2, a diode D5, and a relay J1. One end of the resistor R1 is connected to the main control module. The other end of the resistor R1 is connected to the base of the triode Q2. The emitter of the triode Q2 is grounded. The collector of the triode Q2 is connected to one end of the relay J1 and the positive electrode of the diode D5. The negative electrode of the diode D5 is connected to the other end of the relay J1 and a 12V voltage.