A socket type surge protector integrating a decoupling device, a lightning protection device and a power output socket

Abstract

The utility model discloses a kind of socket type surge protectors integrating decoupler, lightning protection, power output socket, belong to a kind of lightning protection device. It includes shell, and power cord is provided on shell, power cord is connected to anti-surge circuit board after being connected in series power switch, current overload protector, decoupler in turn, then be connected with power output socket.Anti-surge circuit board uses multistage protection circuit, and the first stage protection circuit includes decoupler, and the rear end of decoupler is connected with at least two levels discharge loop, and discharge loop includes voltage-dependent resistor and gas discharge tube.The utility model increases the inductive reactance of power cord, makes up the insufficient length of power cord, coordinates the cooperation between socket type surge protector and previous stage surge protector, uses voltage-dependent resistor, gas discharge tube to filter out overvoltage and overcurrent in hot line and zero line due to multistage power surge protector energy mismatch or other reasons, effectively protects electrical equipment from lightning and other magnetic field, electric field etc. Interference and damage.

Description

Technical Field

[0001] This utility model relates to the fields of decoupling devices, surge protectors, and power sockets, specifically to a socket-type surge protector that integrates a decoupling device, surge protector, and power output socket. Background Technology

[0002] With social progress and the promotion of science and technology, people's production activities and daily lives are increasingly inseparable from various electrical appliances and communication devices, thus requiring a large number of power strips in various forms. Currently, many products on the market combine surge protection and power strips into one unit. The general principle is to connect surge protection components, primarily varistors, at the socket's inlet line, providing surge and lightning protection to the subsequent output sockets of the power line, ensuring electrical safety for external electrical devices. However, most surge protection power strips only use one set of varistors and do not employ multi-level protection. This can lead to energy mismatches with the surge protectors in the upstream distribution box or insufficient line length, resulting in incomplete reliability and safety in terms of surge protection. Utility Model Content

[0003] The purpose of this utility model is to provide a socket-type surge protector that integrates a decoupling device, surge protection, and power socket. It can solve the problem of energy mismatch between two surge protectors or insufficient line length, thereby protecting the safe and reliable operation of the system and the surge protector.

[0004] To achieve the above objectives, this utility model employs the following technical solution.

[0005] A socket-type surge protector that integrates decoupling, lightning protection, and power output socket includes a housing, power cord, power switch, current overload protector, surge protection circuit board installed in the housing, and power output socket. The surge protection circuit board adopts a multi-level protection circuit. The first-level protection circuit includes a decoupling device. At least two discharge circuits are connected in parallel at the rear end of the decoupling device. The discharge circuits include a varistor and a gas discharge tube. The housing is equipped with a power cord, which is connected in series with a power switch, an overload protector, and a decoupling device before being connected to a surge protection circuit board and then to a power output socket.

[0006] Furthermore, the first-level protection circuit consists of decouplers connected in series with the live wire and the neutral wire respectively; The second-level protection circuit consists of a varistor and a gas discharge tube connected in series and then connected in parallel between the live wire and the ground wire, and between the neutral wire and the ground wire. The third-level protection circuit consists of a varistor connected in parallel between the live wire and the neutral wire, the live wire and the ground wire, and the neutral wire and the ground wire.

[0007] Furthermore, the second-level protection circuit includes varistor MOV1, varistor MOV2, gas discharge tube GDT1, gas discharge tube GDT2, and common-mode inductor L1. Varistor MOV1 and gas discharge tube GDT1 are connected in series between the live wire and the ground wire, and varistor MOV2 and gas discharge tube GDT2 are connected in series between the neutral wire and the ground wire to achieve common-mode surge protection. The common-mode inductor is connected in series between the live wire and the neutral wire to filter out common-mode interference. The third-level protection circuit includes varistor MOV3, MOV4, and MOV5. Varistor MOV3 is connected in series between the live wire and the ground wire, varistor MOV4 is connected in series between the live wire and the neutral wire, and MOV5 is connected in series between the neutral wire and the ground wire to achieve full-mode surge protection.

[0008] Furthermore, the surge protection circuit board is also equipped with a thermal fuse. The thermal fuse is connected between the end of the varistor MOV3 and MOV4 that are connected and the live wire. That is, the varistor MOV3 and the thermal fuse are connected in series between the live wire and the ground wire, and the varistor MOV4 and the thermal fuse are connected in series between the live wire and the neutral wire. This is used to melt and cut off the circuit when the varistor fails.

[0009] Furthermore, it also includes a status indicator circuit, which is composed of a light-emitting diode and a step-down resistor connected in series.

[0010] Furthermore, the status indication circuit includes a power supply operation indication circuit, a grounding status indication circuit, an overload indication circuit, and a lightning protection fault indication circuit; The power operation indicator circuit includes a series-connected light-emitting diode LED2 and a step-down resistor R2. One pin of the step-down resistor R2 is connected to the live wire, and the other pin is connected to the positive terminal of the light-emitting diode LED2. The negative terminal of the light-emitting diode LED2 is grounded to the PE wire. The grounding status indicator circuit includes a light-emitting diode LED2 and a step-down resistor R3. One pin of the step-down resistor R3 is connected to the live wire, and the other pin is connected to the positive terminal of the light-emitting diode LED3. The negative terminal of the light-emitting diode LED3 is connected to the neutral wire. The overload indication circuit includes a light-emitting diode LED1 and a step-down resistor R1. One pin of the step-down resistor R1 is connected to the input terminal of the current overload protector, the other pin of the step-down resistor R1 is connected to the positive terminal of the light-emitting diode LED1, and the negative terminal of the light-emitting diode LED1 is connected to the output terminal of the current overload protector. The lightning protection fault indication circuit includes a light-emitting diode (LED4) and a step-down resistor (R4). One pin of the step-down resistor (R4) is connected to the live wire, and the other pin is connected to the positive terminal of the LED4. The negative terminal of the LED4 is connected to a varistor (MOV3), and the varistor (MOV4) is connected to one end of the thermal fuse.

[0011] Furthermore, the power output socket is a three-pole socket, and the live wire, neutral wire, and ground wire of the three-pole socket are electrically connected to the live wire, neutral wire, and ground terminal of the power cord, respectively.

[0012] Furthermore, the decoupling element is an inductive component used to increase line reactance and coordinate energy matching with the upstream surge protector.

[0013] The advantages of this utility model are: By utilizing the inductive characteristics of a decoupling device to increase line inductive reactance, compensate for insufficient conductor length, and coordinate the energy exchange between the socket surge protector and its upstream surge protector; the varistor, gas discharge tube, and common-mode inductor on the surge protection circuit board provide surge and lightning protection for external electrical equipment connected to the power strip output socket; the internal thermal element of the current overload protector triggers when it reaches a certain temperature, cutting off the circuit and effectively preventing wire overheating and appliance damage; a thermal fuse, when the varistor itself cracks, ages, or fails and heats up, can melt the surge protection circuit, quickly disconnecting the faulty device from the power line and preventing short circuits or even fires; LEDs connected in series with a step-down resistor and then in parallel on the current overload protector and varistor sides indicate current overload and surge protection fault status. LEDs connected in series between the live and neutral wires, and between the live and ground wires, indicate the working power supply and grounding status. Through the above design, this socket-type surge protector achieves reliable surge protection and safe operation. Attached Figure Description

[0014] Figure 1 This is a circuit connection diagram of a socket-type surge protector that integrates a decoupling device, lightning protection, and power output socket.

[0015] In the diagram: 1. Power cord, 2. Power switch, 3. Overload protector, 4. Decoupling device, 5. Step-down resistor, 6. Light-emitting diode, 7. Varistor, 8. Gas discharge tube, 9. Common mode inductor, 10. Thermal fuse, 11. Power output socket. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0017] Please refer to Figure 1The surge protector of this utility model consists of a power cord 1, a housing, a power output socket 11, a surge protection circuit board, a power switch, and a current overload protector. The surge protection circuit board is equipped with a decoupling device 4, step-down resistors R1 to R4, light-emitting diodes LED1 to LED4, varistors MOV1 to MOV5, gas discharge tubes GDT1 to GDT2, a common-mode inductor 9, and a thermal fuse 10.

[0018] The surge protector in this embodiment employs a three-stage protection system. The first stage of protection consists of a decoupling device 4, connected in series between the live and neutral wires. The second stage of protection comprises varistors MOV1-MOV2 and gas discharge tubes GDT1-GDT2 connected in series. After the varistors and gas discharge tubes are connected in parallel, they are then connected in parallel between the live and ground wires, and between the neutral and ground wires, for common-mode protection. The third stage of protection consists of varistors MOV3-MOV5, connected in series between the live and neutral wires, between the live and ground wires, and between the neutral and ground wires, for full-mode protection.

[0019] The second-stage protection circuit connects the varistor in series with the gas discharge tube, which helps to improve the response speed, reduce the limiting voltage, block the leakage current of the varistor during normal system operation, slow down the performance degradation of the varistor, and effectively eliminate the follow current problem when the gas discharge tube discharges.

[0020] The third-level protection circuit utilizes the fast response speed and low clamping voltage characteristics of varistors to provide full-mode protection for the live and neutral wires, limiting the voltage to a relatively low level, thereby protecting the electrical equipment connected to the power socket.

[0021] Working principle: When power line 1 is subjected to induced lightning strikes or surge voltage interference, the inductive characteristics of decoupling device 4 are first used to increase the line reactance, suppressing the lightning current and delaying its intrusion into downstream electrical equipment. The varistor MOV1~MOV2 and gas discharge tube GDT1~GDT2 quickly conduct and limit the voltage, leading the lightning current to the ground wire for discharge and voltage reduction through the varistor MOV1~MOV2 and gas discharge tube GDT1~GDT2. At the same time, the voltage is further reduced through varistor MOV3~MOV5. The clamping voltage presented across varistor MOV3~MOV5 limits the voltage between the live wire and neutral wire, between the live wire and ground wire, and between the neutral wire and ground wire to a small level, thus providing lightning and surge protection for the electrical equipment connected to the power socket.

[0022] When the varistor MOV3 to MOV5 in the third-level protection circuit are subjected to multiple large lightning current surges, or if they age, crack, or fail, they may break down and short-circuit, causing severe overheating. In this case, the thermal fuse 10 attached to them will melt, quickly disconnecting the faulty device from the power line and preventing further overheating, short circuits, or even fires, thus ensuring the safety of the power line and electrical equipment. Simultaneously, LED4 illuminates, indicating that the surge protector's lightning protection function has failed and it should be repaired or replaced.

[0023] One pin of the step-down resistor R1 is connected to the input terminal of the overload protector, and the other pin is connected to the positive terminal of LED1. The negative terminal of LED1 is connected to the output terminal of the overload protector. When the power of the electrical equipment connected to the power outlet exceeds the maximum power of the power strip, the thermal element inside the overload protector will spring open as the current increases, cutting off power to the power outlet and preventing overheating of the power line and outlet, equipment failure, or even fire. When LED1 is lit, it indicates that the load is too high and the power consumption should be checked. After it cools down, it can be reset. When LED1 is off, it indicates that the load current is less than the rated current, and the surge protector is in a safe state.

[0024] One pin of the step-down resistor R2 is connected to the live wire, and the other pin is connected to the positive terminal of LED2. The negative terminal of LED2 is grounded to the PE wire, forming a power operation indicator. When LED2 is lit, it indicates that the power cord of the socket-type surge protector is properly connected. When LED2 is lit and not lit, it indicates that the power cord of the socket-type surge protector is not reliably connected or that power switch 1 is not turned on.

[0025] One pin of the step-down resistor R3 is connected to the live wire, and the other pin is connected to the positive terminal of LED3. The negative terminal of LED3 is connected to the neutral wire, forming a grounding status indicator. When LED3 is lit, it indicates that the grounding wire of the socket-type surge protector is properly connected; when LED3 is lit and not lit, it indicates that the socket-type surge protector is not reliably grounded.

[0026] One pin of the step-down resistor R4 is connected to the live wire, and the other pin is connected to the positive terminal of LED4. The negative terminal of LED4 is connected to one end of the varistor MOV3 and MOV4, and then connected in parallel with the thermal fuse 10 to form a surge protection status indicator. When LED4 is off, it indicates that the surge protection circuit is working normally; when LED4 is on, it indicates that the surge protection circuit is faulty and should be repaired or replaced.

[0027] Through the above technical solution, when this utility model is working on a normal power line, the decoupling device is in a low-resistance state, the varistors MOV1-MOV5 and the gas discharge tubes GDT1-GDT2 on the surge protection circuit board are in a high-resistance state, the overload protector 3 and the thermal fuse 10 are in a conducting state, and the surge protection circuit has no effect on the power line and the socket. At this time, LED1 is off, indicating that the total current of the electrical equipment is lower than the rated current of the socket-type surge protector; LED2 is on, indicating that the power supply is working normally; LED3 is on, indicating that the grounding is good; LED4 is off, indicating that the surge protection circuit is working normally.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A socket-type surge protector integrating a decoupling device, lightning protection, and power output socket, characterized in that, It includes a housing, a power cord, a power switch, a current overload protector, a surge protection circuit board installed inside the housing, and a power output socket. The surge protection circuit board adopts a multi-level protection circuit. The first-level protection circuit includes a decoupling device. At least two discharge circuits are connected in parallel to the rear end of the decoupling device. The discharge circuit includes a varistor and a gas discharge tube. The housing is equipped with a power cord, which is connected in series with a power switch, an overload protector, and a decoupling device before being connected to a surge protection circuit board and then to a power output socket.

2. The socket-type surge protector integrating decoupling, lightning protection, and power output socket as described in claim 1, characterized in that: The first-level protection circuit consists of decouplers connected in series with the live wire and the neutral wire respectively; The second-level protection circuit consists of a varistor and a gas discharge tube connected in series and then connected in parallel between the live wire and the ground wire, and between the neutral wire and the ground wire. The third-level protection circuit consists of a varistor connected in parallel between the live wire and the neutral wire, the live wire and the ground wire, and the neutral wire and the ground wire.

3. The socket-type surge protector integrating decoupling, lightning protection, and power output socket as described in claim 2, characterized in that, The second-level protection circuit includes varistor MOV1, varistor MOV2, gas discharge tube GDT1, gas discharge tube GDT2, and common-mode inductor L1. Varistor MOV1 and gas discharge tube GDT1 are connected in series between the live wire and the ground wire. Varistor MOV2 and gas discharge tube GDT2 are connected in series between the neutral wire and the ground wire to achieve common-mode surge protection. The common-mode inductor is connected in series between the live wire and the neutral wire to filter out common-mode interference. The third-level protection circuit includes varistor MOV3, MOV4, and MOV5. Varistor MOV3 is connected in series between the live wire and the ground wire. Varistor MOV4 is connected in series between the live wire and the neutral wire. MOV5 is connected in series between the neutral wire and the ground wire to achieve full-mode surge protection.

4. The socket-type surge protector integrating decoupling, lightning protection, and power output socket as described in claim 1, characterized in that, The surge protection circuit board is also equipped with a thermal fuse. The thermal fuse is connected between the end of the varistor MOV3 and MOV4 that are connected and the live wire. That is, the varistor MOV3 and the thermal fuse are connected in series between the live wire and the ground wire, and the varistor MOV4 and the thermal fuse are connected in series between the live wire and the neutral wire. This is used to melt and cut off the circuit when the varistor fails.

5. The socket-type surge protector integrating decoupling, lightning protection, and power output socket as described in claim 4, characterized in that, It also includes a status indicator circuit, which is composed of a light-emitting diode and a step-down resistor connected in series.

6. The socket-type surge protector integrating decoupling, lightning protection, and power output socket as described in claim 5, characterized in that, The status indication circuit includes a power supply operation indication circuit, a grounding status indication circuit, an overload indication circuit, and a lightning protection fault indication circuit. The power operation indicator circuit includes a light-emitting diode LED2 and a step-down resistor R2 connected in series. One pin of the step-down resistor R2 is connected to the live wire, and the other pin is connected to the positive terminal of the light-emitting diode LED2. The negative terminal of the light-emitting diode LED2 is grounded to the PE wire. The grounding status indicator circuit includes a light-emitting diode LED2 and a step-down resistor R3. One pin of the step-down resistor R3 is connected to the live wire, and the other pin is connected to the positive terminal of the light-emitting diode LED3. The negative terminal of the light-emitting diode LED3 is connected to the neutral wire. The overload indication circuit includes a light-emitting diode LED1 and a step-down resistor R1. One pin of the step-down resistor R1 is connected to the input terminal of the current overload protector, the other pin of the step-down resistor R1 is connected to the positive terminal of the light-emitting diode LED1, and the negative terminal of the light-emitting diode LED1 is connected to the output terminal of the current overload protector. The lightning protection fault indication circuit includes a light-emitting diode (LED4) and a step-down resistor (R4). One pin of the step-down resistor (R4) is connected to the live wire, and the other pin is connected to the positive terminal of the LED4. The negative terminal of the LED4 is connected to a varistor (MOV3), and the varistor (MOV4) is connected to one end of the thermal fuse.

7. The socket-type surge protector integrating decoupling, lightning protection, and power output socket as described in claim 1, characterized in that, The power output socket is a three-pole socket, and the live wire, neutral wire, and ground wire of the three-pole socket are electrically connected to the live wire, neutral wire, and ground terminal of the power cord, respectively.

8. The socket-type surge protector integrating decoupling, lightning protection, and power output socket as described in claim 1, characterized in that, The decoupling device is an inductive element used to increase line reactance and coordinate energy matching with the upstream surge protector.

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