A lightning protection socket based on deep ultraviolet arc fault detection

Abstract

The present invention provides a lightning protection socket based on deep ultraviolet arc fault detection, an arc fault detection circuit and a surge protection circuit. The input end of the arc fault detection circuit is connected to the live wire L of alternating current, and the output end is connected to the neutral wire N of alternating current. The input end of the surge protection circuit is connected to the live wire L of alternating current, and the two output ends are respectively connected to the neutral wire N and the ground wire E of alternating current. The arc fault detection circuit includes a clamping diode D2, shunt resistors R2 to R4, a light-emitting diode LED2 and a deep ultraviolet arc detection chip UVC1. The surge protection circuit includes a fuse F1, a working indication circuit, temperature fuses TF2 to TF3, varistors RV1 to RV3 and a gas discharge tube GDT1. The beneficial effects of the present invention are as follows: For the socket disclosed in the present invention, when the arc light of 240 nm to 320 nm generated by equipment or lightning irradiates the socket, the blue LED light will light up, and when there is no irradiation, the blue light will go out. The detection operation is simple, the cost is saved, and the detection accuracy and sensitivity of the socket are improved.

Description

Technical Field

[0001] The present invention relates to the technical fields of arc detection and lightning protection, and in particular to a lightning protection socket based on deep ultraviolet arc fault detection. Background Art

[0002] At present, the lightning protection in the lightning protection socket industry mainly relies on surge protection circuits, which only protect against the large current of lightning, but cannot detect fires caused by lightning and electricity. There are almost no sockets with arc fault detection and lightning protection functions. The existing arc fault detection circuits are complex. It is necessary to detect the load current, amplify the current signal and transmit it to the arc characteristic filter, and determine whether the frequency of the current signal is greater than the power supply frequency and less than the power line communication frequency; the signal output by the filter is compared with the set arc current threshold value, and when it is greater than the current threshold value, it is added to the accumulator; the arc fault protection circuit regularly checks the output of the accumulator, and when it exceeds the threshold value, it triggers a tripping signal. This method is very complex and costly. Summary of the Invention

[0003] To solve the above problems, the present invention provides a lightning protection socket based on deep ultraviolet arc fault detection, including: an arc fault detection circuit and a surge protection circuit. The input end of the arc fault detection circuit is connected to the live wire L of the alternating current, and the output end is connected to the neutral wire N of the alternating current. The input end of the surge protection circuit is connected to the live wire L of the alternating current, and the two output ends are respectively connected to the neutral wire N and the ground wire E of the alternating current;

[0004] The arc fault detection circuit includes a clamping diode D2, shunt resistors R2 to R4, a light-emitting diode LED2, and a deep ultraviolet arc detection chip UVC1. One end of the clamping diode D2 is connected to the live wire L, and the other end is connected to the shunt resistors R2 and R3. The shunt resistors R2 and R3 are connected in series, and the connection point of R2 and R3 is also connected to the light-emitting diode LED2. The light-emitting diode LED2 is connected in parallel with the shunt resistor R4. The two ends of the deep ultraviolet arc detection chip UVC1 are respectively connected to the light-emitting diode LED2 and the neutral wire N;

[0005] The surge protection circuit includes a fuse F1, a working indication circuit, thermal fuses TF2 - TF3, varistors RV1 - RV3, and a gas discharge tube GDT1. The working indication circuit includes a voltage-dividing resistor R1, a rectifying diode D1, and a light-emitting diode LED1. The two ends of the rectifying diode D1 are respectively connected to the voltage-dividing resistor R1 and the light-emitting diode LED1. One end of the working indication circuit and the fuse F1 are connected to the live wire L together. The other end of the working indication circuit and one end of the varistor RV1 are connected to the neutral wire N together. The other end of the varistor RV1 is connected to the thermal fuse TF3. The other end of the thermal fuse TF3 is connected to the thermal fuse TF2. The other end of the thermal fuse TF2 is connected to the varistor RV3. The varistor RV2 is connected in parallel with the varistor RV3 and then connected to the gas discharge tube GDT1. The other end of the gas discharge tube GDT1 is connected to the ground wire E.

[0006] Further, the deep ultraviolet arc detection chip UVC1 is a gallium nitride semiconductor deep ultraviolet arc detection chip.

[0007] Further, the model of the gallium nitride semiconductor deep ultraviolet arc detection chip is DGA-254-130AV, which is used to respond to the arc light of 240nm - 320nm.

[0008] Further, the light-emitting diode LED2 is a high-brightness blue light-emitting diode.

[0009] Further, the light-emitting diode LED1 is a red light-emitting diode.

[0010] The beneficial effects brought by the technical solution provided by the present invention are as follows: For the socket disclosed by the present invention, when irradiated by a device that generates arc light of 240nm - 320nm, the blue LED light will light up, and the blue light will go out when not irradiated. The detection operation is simple, the cost is saved, and the detection accuracy and sensitivity of the socket are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0012] Figure 1 is the circuit diagram of a lightning protection socket based on deep ultraviolet arc fault detection in an embodiment of the present invention;

[0013] Figure 2 is the overall structure diagram of the lightning protection socket in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] In order to have a clearer understanding of the technical features, purposes, and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the drawings.

[0015] An embodiment of the present invention provides a lightning protection socket based on deep ultraviolet arc fault detection.

[0016] Please refer to Figure 1 , Figure 1 , which is the circuit diagram of a lightning protection socket based on deep ultraviolet arc fault detection in an embodiment of the present invention. Specifically, it includes an arc fault detection circuit and a surge protection circuit. The input end of the arc fault detection circuit is connected to the live wire L of the alternating current, and the output end is connected to the neutral wire N of the alternating current. The input end of the surge protection circuit is connected to the live wire L of the alternating current, and the two output ends are respectively connected to the neutral wire N and the ground wire E of the alternating current.

[0017] The arc fault detection circuit consists of a clamping diode D2, shunt resistors R2 - R4, a blue high-brightness light-emitting diode LED2, and a gallium nitride semiconductor deep ultraviolet (responding to arc light of 240nm - 320nm) arc detection chip UVC1. The model of this arc detection chip is DGA-254-130AV. One end of the clamping diode D2 is connected to the live wire L, and the other end is connected to the shunt resistors R2 and R3. The shunt resistors R2 and R3 are in series, and the connection point of R2 and R3 is also connected to the blue high-brightness light-emitting diode LED2. This blue high-brightness light-emitting diode LED2 is in parallel with the shunt resistor R4. The two ends of the gallium nitride semiconductor deep ultraviolet arc detection chip UVC1 are respectively connected to the blue high-brightness light-emitting diode LED2 and the neutral wire N. In this circuit, D2 is used for rectification, and the current is shunted by R2, R3, and R4 and then reaches the UVC1 deep ultraviolet arc light detection lamp bead. When UVC1 detects arc light, the LED2 lamp lights up, indicating the existence of arc light.

[0018] When there is no arc light such as in the case of lightning or electricity, the UVC1 chip presents a high-resistance state, resulting in the inability to drive the blue light-emitting diode LED2. When arc light appears, the UVC1 chip presents a sub-high-resistance state, and a small current (not greater than 75 nanograms) drives the light-emitting diode LED2 to emit blue light to inform the user of the existence of an arc through D2 rectification and R2 - R4 shunt voltage division. By using a gallium nitride third-generation semiconductor deep ultraviolet arc light detection chip, a small current startup circuit is designed to complete arc light detection.

[0019] The surge protection circuit is composed of a large current fuse F1, a working indication circuit, temperature fuses TF2 - TF3, varistors RV1 - RV3, and a gas discharge tube GDT1. The working indication circuit is composed of a voltage dividing resistor R1, a rectifying diode D1, and a red light emitting diode LED1. The two ends of the rectifying diode D1 are respectively connected to the voltage dividing resistor R1 and the red light emitting diode LED1. One end of the working indication circuit and the large current fuse F1 are connected to the live wire L together. The other end of the working indication circuit and one end of the varistor RV1 are connected to the neutral wire N together. The other end of the varistor RV1 is connected to the temperature fuse TF3. The other end of the temperature fuse TF3 is connected to the temperature fuse TF2. The other end of this temperature fuse TF2 is connected to the varistor RV3. The varistor RV2 is in parallel with the varistor RV3 and then connected to the gas discharge tube GDT1. The other end of the gas discharge tube GDT1 is connected to the ground wire E. When the alternating current is connected, the LED1 lights up. If the fuse F1 burns out, it will not light up.

[0020] When a strong lightning current arrives, at this time, the instantaneous large current will pass through the gas discharge tube GDT1 for surge protection, and at the same time, the large current fuse F1, the temperature fuse TF3, and the varistor RV1 are started to work, cutting off the lightning large current from entering the household appliances and avoiding damaging the household appliances and equipment.

[0021] Compared with the existing technology, the advantages of the present invention are:

[0022] For the socket disclosed in the present invention, when the socket is irradiated by the 240nm - 320nm arc light generated by the device or lightning, the blue LED light will light up, and the blue light will go out when there is no irradiation. The detection operation is simple, the cost is saved, and the detection accuracy and sensitivity of the socket are improved. The lightning protection test of this socket has passed the German Rheinland detection (TUV) CB test (the detection standard is IEC60884).

[0023] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A lightning protection socket based on deep ultraviolet arc fault detection, characterized in that: Including: An arc fault detection circuit and a surge protection circuit. The input end of the arc fault detection circuit is connected to the live wire L of the alternating current, and the output end is connected to the neutral wire N of the alternating current. The input end of the surge protection circuit is connected to the live wire L of the alternating current, and the two output ends are respectively connected to the neutral wire N and the ground wire E of the alternating current; The arc fault detection circuit includes a clamping diode D2, shunt resistors R2 to R4, a light-emitting diode LED2, and a deep ultraviolet arc detection chip UVC1. One end of the clamping diode D2 is connected to the live wire L, and the other end is connected to the shunt resistors R2 and R3. The shunt resistors R2 and R3 are connected in series. The connection point of R2 and R3 is also connected to the light-emitting diode LED2. The light-emitting diode LED2 is connected in parallel with the shunt resistor R4. The two ends of the deep ultraviolet arc detection chip UVC1 are respectively connected to the light-emitting diode LED2 and the neutral wire N; The deep ultraviolet arc detection chip UVC1 is a gallium nitride semiconductor deep ultraviolet arc detection chip; The light-emitting diode LED2 is a blue high-brightness light-emitting diode; The surge protection circuit includes a fuse F1, a working indication circuit, temperature fuses TF2 to TF3, varistors RV1 to RV3, and a gas discharge tube GDT1. The working indication circuit includes a voltage-dividing resistor R1, a rectifying diode D1, and a light-emitting diode LED1. The two ends of the rectifying diode D1 are respectively connected to the voltage-dividing resistor R1 and the light-emitting diode LED1; One end of the working indication circuit and the fuse F1 are connected to the live wire L together. The other end of the working indication circuit and one end of the varistor RV1 are connected to the neutral wire N together. The other end of the varistor RV1 is connected to the temperature fuse TF3. The other end of the temperature fuse TF3 is connected to the temperature fuse TF2. The other end of the temperature fuse TF2 is connected to the varistor RV3. The varistor RV2 is connected in parallel with the varistor RV3, and then connected to the gas discharge tube GDT1. The other end of the gas discharge tube GDT1 is connected to the ground wire E.

2. The lightning protection socket based on deep ultraviolet arc fault detection according to claim 1, wherein: The model of the gallium nitride semiconductor deep ultraviolet arc detection chip is DGA-254-130AV, which is used to respond to arc light of 240nm to 320nm.

3. The lightning protection socket based on deep ultraviolet arc fault detection according to claim 1, characterized in that: The light-emitting diode LED1 is a red light-emitting diode.

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