CN216672592U - Lightning protection device and electronic equipment - Google Patents
Lightning protection device and electronic equipment Download PDFInfo
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- CN216672592U CN216672592U CN202122978976.4U CN202122978976U CN216672592U CN 216672592 U CN216672592 U CN 216672592U CN 202122978976 U CN202122978976 U CN 202122978976U CN 216672592 U CN216672592 U CN 216672592U
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Abstract
The utility model relates to a lightning protection device and an electronic device, comprising: the working circuit is connected with the working circuit, extends out of the shell and is respectively used for connecting a first connecting end, a second connecting end and a third connecting end of an L end, an N end and a PE end of an alternating current input; the operating circuit includes: the protection circuit comprises a first protection circuit, a second protection circuit, a third protection circuit, a fourth protection circuit and a fifth protection circuit; the first end of the fifth protection circuit is connected with the first connecting end, the second end of the fifth protection circuit is connected with the first end of the first protection circuit and the first end of the second protection circuit, the second end of the first protection circuit and the first end of the third protection circuit are respectively connected with the second connecting end, the second end of the second protection circuit and the second end of the third protection circuit are respectively connected with the first end of the fourth protection circuit, and the second end of the fourth protection circuit is connected with the third connecting end. The lightning protection device is simple in structure and convenient to install, can effectively inhibit lightning surge, and reduces lightning damage.
Description
Technical Field
The utility model relates to the technical field of circuit protection, in particular to a lightning protection device and electronic equipment.
Background
LEDs are gradually replacing traditional lighting sources and are finding wider and wider application in various lighting fields. Along with the increasing development of social and economic construction, the level of urban road infrastructure illumination construction becomes an important sign of the speed and the level of urban development, and the quality of illumination engineering not only influences the safety of vehicles and pedestrians, but also relates to the realization of energy-saving and environment-friendly targets.
Because outdoor lighting needs to work normally in sunny days or thunderstorm, if the power supply is not provided with lightning protection and surge circuits or is not properly processed, the power supply and the lamp are damaged if the power supply is not provided with the lightning protection and surge circuits, and fire or casualties are caused if the power supply is not properly processed, so that huge loss is generated. Finally, various losses of manpower, material resources and financial resources are brought.
Meanwhile, the outdoor lighting power supply must meet the requirements of power grid voltage requirements, safety requirements and EMC requirements of various countries and regions in addition to the requirement of basic electrical performance of the power supply. Especially, the lightning protection and surge protection must meet the standard requirements of IEC61000-4-5 or GB/T17626.52008.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a lightning protection device and electronic equipment.
The technical scheme adopted by the utility model for solving the technical problems is as follows: constructing a lightning protection device comprising: the circuit comprises a shell, a working circuit arranged in the shell, a first connecting end, a second connecting end and a third connecting end, wherein the first connecting end, the second connecting end and the third connecting end are connected with the working circuit and extend out of the shell;
the operating circuit includes: the protection circuit comprises a first protection circuit, a second protection circuit, a third protection circuit, a fourth protection circuit and a fifth protection circuit;
the first end of the fifth protection circuit is connected with the first connecting end, the second end of the fifth protection circuit is connected with the first end of the first protection circuit and the first end of the second protection circuit, the second end of the first protection circuit and the first end of the third protection circuit are respectively connected with the second connecting end, the second end of the second protection circuit and the second end of the third protection circuit are respectively connected with the first end of the fourth protection circuit, and the second end of the fourth protection circuit is connected with the third connecting end.
Preferably, in the protection device of the present invention, the fifth protection circuit includes a fuse tube F1; the first end of the fuse tube F1 is connected to the first connection end, and the second end of the fuse tube F1 is connected to the first end of the first protection circuit and the first end of the second protection circuit.
Preferably, in the protection device of the present invention, the first protection circuit includes a varistor MOV1, a varistor MOV2, a resistor R1 and a gas discharge tube FDG 1;
after the piezoresistor MOV1 and the piezoresistor MOV2 are connected in parallel, one end of the piezoresistor MOV1 is connected with the second end of the fifth protection circuit, the other end of the piezoresistor MOV2 is connected with the first end of the resistor R1 and the first end of the gas discharge tube FDG1, and the second end of the resistor R1 and the second end of the gas discharge tube FDG1 are connected with the second connecting end.
Preferably, in the protection device of the present invention, the resistor R1 is a glass-glaze resistor.
Preferably, in the protection device of the present invention, the fourth protection circuit includes a resistor R2 and a gas discharge tube FDG 2;
the first end of the resistor R2 and the first end of the gas discharge tube FDG2 are connected with each other and then connected with the second end of the second protection circuit and the second end of the third protection circuit, and the second end of the resistor R2 and the second end of the gas discharge tube FDG2 are both connected with the third connection end.
Preferably, in the protection device of the present invention, the second protection circuit comprises a varistor MOV3 and a varistor MOV 4; the piezoresistor MOV3 and the piezoresistor MOV4 are connected in parallel, one end of the piezoresistor MOV3 is connected with the second end of the fifth protection circuit, and the other end of the piezoresistor MOV4 is connected with the first end of the resistor R2 and the first end of the gas discharge tube FDG 2; and/or
The third protection circuit comprises a voltage dependent resistor MOV5 and a voltage dependent resistor MOV 6; the varistor MOV5 and the varistor MOV6 are connected in parallel, one end of the varistor MOV5 and one end of the varistor MOV6 are connected with the second connecting end, and the other end of the varistor MOV6 and the first end of the resistor R2 and the first end of the gas discharge tube FDG2 are connected.
Preferably, in the protection device of the present invention, the resistor R2 is a glass-glaze resistor.
Preferably, in the protection device of the present invention, the first connection end, the second connection end, and the third connection end each include a wire extending outside the housing by a preset length, and the lightning protection device is configured to be correspondingly connected to an ac input through the wire.
Preferably, in the protection device of the present invention, the lead wire is soldered to the ac input or is fastened to the ac input through a terminal.
The utility model also provides an electronic device comprising a lightning protection device as defined in any one of the above.
The lightning protection device and the electronic equipment have the following beneficial effects that: simple structure, simple to operate, and can effectively restrain the thunderbolt surge, reduce the thunderbolt harm.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic structural diagram of an embodiment of a lightning protection device according to the utility model;
FIG. 2 is a schematic circuit diagram of an embodiment of a lightning protection device according to the utility model;
fig. 3 is a schematic structural diagram of another embodiment of a lightning protection device according to the utility model.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1 and 3, in a first embodiment of a lightning protection device of the present invention, the lightning protection device includes: the shell 120 is a working circuit arranged in the shell 120, and is connected with the working circuit and extends to a first connection end 111, a second connection end 112 and a third connection end 113 outside the shell 120, wherein the first connection end 111 is used for connecting an L end of an alternating current input, the second connection end 112 is used for connecting an N end of the alternating current input, and the third connection end 113 is used for connecting a PE end of the alternating current input; the operating circuit includes: a first guard circuit 131, a second guard circuit 132, a third guard circuit 133, a fourth guard circuit 134, and a fifth guard circuit 135; the first end of the fifth protection circuit 135 is connected to the first connection end 111, the second end of the fifth protection circuit 135 is connected to the first end of the first protection circuit 131 and the first end of the second protection circuit 132, the second end of the first protection circuit 131 and the first end of the third protection circuit 133 are respectively connected to the second connection end 112, the second end of the second protection circuit 132 and the second end of the third protection circuit 133 are respectively connected to the first end of the fourth protection circuit 134, and the second end of the fourth protection circuit 134 is connected to the third connection end 113. Specifically, the lightning protection circuit, i.e. the working circuit, in the lightning protection device is disposed inside a housing 120 of the device, and a first connection end 111, a second connection end 112, and a third connection end 113 are disposed outside the housing 120, and these connection ends are used to be connected with an L end, an N end, and a PE end of the ac input. This means that the device is connected in parallel to the power grid via the first connection 111, the second connection 112 and the third connection 113. The fifth protection circuit 135 is connected to the first connection terminal 111, and performs primary protection on the high voltage and the large current input from the ac L terminal. When the device normally works, namely no lightning surge signal is input, the protection circuit in the device does not work, namely the device does not work, and alternating current output of a power grid directly supplies power to a rear-stage circuit such as an LED driving power supply through an original circuit. The first protection circuit 131 is connected between the first connection end 111 and the second connection end 112, and is used for protecting a differential mode signal (L-N) generated by a lightning surge signal between the first connection end 111 and the second connection end 112. The second protection circuit 132 and the fourth protection circuit 134 are connected between the first connection end 111 and the third connection end 113, and are used for protecting a common mode signal (L-PE) generated by a lightning surge signal between the first connection end 111 and the third connection end 113. The third protection circuit 133 and the fourth protection circuit 134 are connected between the second connection terminal 112 and the third connection terminal 113, and are used for protecting a common mode signal (N-PE) generated by the lightning surge signal between the second connection terminal 112 and the third connection terminal 113. The lightning surge signal in the power grid is protected finally, so that the lightning surge signal is prevented from entering a post-stage working circuit.
As shown in fig. 2, the fifth protection circuit 135 includes a fuse tube F1; the first end of the fuse F1 is connected to the first connection end 111, and the second end of the fuse F1 is connected to the first end of the first protection circuit 131 and the first end of the second protection circuit 132. Specifically, the fuse F1 is connected to the L terminal of the ac input, and is used to protect the high voltage and the large current input from the L terminal, so as to prevent the high voltage and the large current from damaging other protection circuits or other working circuits inside the device, and when the energy at the input terminal of the device is too large, the fuse (F1) will open circuit, thereby protecting the lightning protection device.
Optionally, the first protection circuit 131 includes a varistor MOV1, a varistor MOV2, a resistor R1, and a gas discharge tube FDG 1; the varistor MOV1 and the varistor MOV2 are connected in parallel, and then one end of the varistor is connected to the second end of the fifth protection circuit 135, the other end of the varistor is connected to the first end of the resistor R1 and the first end of the gas discharge tube FDG1, and the second end of the resistor R1 and the second end of the gas discharge tube FDG1 are connected to the second connection terminal 112. Specifically, a differential mode signal generated by a lightning surge signal between the first connection end 111 and the second connection end 112 enables the varistor MOV1, the varistor MOV2, the gas discharge tube FDG1 and the resistor R1 to be directly conducted to act, so that the voltage is clamped at a limit value, and the residual voltage in the circuit cannot affect or damage a rear-stage working circuit. The resistor R1 may be a glass-glazed resistor to improve the reliability of the circuit. The same 10D small volume varistor may be used for both varistor MOV1 and varistor MOV 2.
Optionally, the fourth protection circuit 134 includes a resistor R2 and a gas discharge tube FDG 2; the first end of the resistor R2 and the first end of the gas discharge tube FDG2 are connected to each other and then connected to the second end of the second protection circuit 132 and the second end of the third protection circuit 133, and the second end of the resistor R2 and the second end of the gas discharge tube FDG2 are both connected to the third connection terminal 113. Specifically, the fourth protection circuit 134 is a common circuit for common mode protection of the first connection end 111 and the second connection end 112 and the third connection end 113, and common mode signals respectively input through the first connection end 111 and the second connection end 112 pass through the corresponding second protection circuit 132 and the third protection circuit, and then pass through the resistor R2 in the fourth protection circuit 134 and the gas discharge tube FDG2 for further clamping, so as to reduce residual voltage of the common mode signals. When the gas discharge tube FDG2 and the resistor R2 are conducted, most of energy of instantaneous surge voltage and surge current is released to the ground through a ground wire (PE) after the gas discharge tube is conducted, and the remaining residual voltage and energy are input into a rear-stage working circuit such as an LED driving power supply and are not enough to damage the power supply, so that the LED driving power supply and an LED lamp are effectively protected finally. The resistor R2 may be a glass-glazed resistor to improve the reliability of the circuit.
Optionally, the second protection circuit 132 comprises a varistor MOV3 and a varistor MOV 4; the voltage dependent resistor MOV3 and the voltage dependent resistor MOV4 are connected in parallel, one end of the voltage dependent resistor MOV3 is connected with the second end of the fifth protection circuit 135, and the other end of the voltage dependent resistor MOV4 is connected with the first end of the resistor R2 and the first end of the gas discharge tube FDG 2; specifically, the common mode signal inputted by the first connection end 111 can be subjected to voltage suppression through the voltage dependent resistor MOV3 and the voltage dependent resistor MOV 4. Wherein, the piezoresistor MOV3 and the piezoresistor MOV4 can adopt the same piezoresistor with 10D small volume.
Optionally, the third protection circuit 133 includes a voltage dependent resistor MOV5 and a voltage dependent resistor MOV 6; the voltage dependent resistor MOV5 and the voltage dependent resistor MOV6 are connected in parallel, and then have one end connected to the second connection terminal 112 and the other end connected to the first end of the resistor R2 and the first end of the gas discharge tube FDG 2. Specifically, the common mode signal inputted from the second connection terminal 112 can be voltage-suppressed by the voltage dependent resistor MOV5 and the voltage dependent resistor MOV 6. Wherein, the piezoresistor MOV5 and the piezoresistor MOV6 can adopt the same piezoresistor with 10D small volume.
As shown in fig. 3, the first connection end 111, the second connection end 112, and the third connection end 113 each include a wire extending outside the housing 120 by a predetermined length, and the lightning protection device is configured to be correspondingly connected to the ac input through the wire. Specifically, the first connection end 111, the second connection end 112, and the third connection end 113 are all provided with a certain length of conducting wire to facilitate connection of the device in the power grid. The outside of the conducting wire can be provided with a protective layer. Wherein different link ends adopt different protective layer colours respectively to each link end is convenient for distinguish, the connection mistake appears in avoiding the installation. In one embodiment, the housing 120 is provided with an identification mark at a position corresponding to each connection end to distinguish each connection end and ensure accurate connection. In an embodiment, the identification mark may also be disposed on the wire.
Optionally, the wire is welded to the ac input or the wire is fastened to the ac input through a terminal. Specifically, when the connection terminal is connected to the ac input, the connection terminal may be connected by welding, or may be fastened by a connection terminal provided on the lead.
The differential mode 10KV-5KV-2 ohm mode impedance and the common mode 10KV-5KA-2 ohm impedance can be realized through the circuit, after 8/20us combined wave signal lightning stroke surge test, the corresponding output residual voltage is less than 1800V, and the requirements of international standards of IEC61000-4-5 and GB/T17626.52008 and IEC/EN 61000-4-12 are completely met.
In addition, the electronic equipment comprises the lightning protection device. The lightning protection device is installed at the alternating current input end of the equipment and correspondingly connected with the alternating current input end of the electronic equipment through the connecting end of the lightning protection device, so that lightning stroke protection of a working circuit in the electronic equipment is realized. Wherein the electronic device can be an LED lamp.
It is to be understood that the foregoing examples, while indicating the preferred embodiments of the utility model, are given by way of illustration and description, and are not to be construed as limiting the scope of the utility model; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (10)
1. A lightning protection device, comprising: the circuit comprises a shell, a working circuit arranged in the shell, a first connecting end, a second connecting end and a third connecting end, wherein the first connecting end, the second connecting end and the third connecting end are connected with the working circuit and extend out of the shell;
the operating circuit includes: the protection circuit comprises a first protection circuit, a second protection circuit, a third protection circuit, a fourth protection circuit and a fifth protection circuit;
the first end of the fifth protection circuit is connected with the first connecting end, the second end of the fifth protection circuit is connected with the first end of the first protection circuit and the first end of the second protection circuit, the second end of the first protection circuit and the first end of the third protection circuit are respectively connected with the second connecting end, the second end of the second protection circuit and the second end of the third protection circuit are respectively connected with the first end of the fourth protection circuit, and the second end of the fourth protection circuit is connected with the third connecting end.
2. The lightning protection device according to claim 1, wherein the fifth protection circuit comprises a fuse tube F1; the first end of the fuse tube F1 is connected to the first connection end, and the second end of the fuse tube F1 is connected to the first end of the first protection circuit and the first end of the second protection circuit.
3. The lightning protection device according to claim 1, wherein the first protection circuit comprises a varistor MOV1, a varistor MOV2, a resistor R1 and a gas discharge tube FDG 1;
after the piezoresistor MOV1 and the piezoresistor MOV2 are connected in parallel, one end of the piezoresistor MOV1 is connected with the second end of the fifth protection circuit, the other end of the piezoresistor MOV2 is connected with the first end of the resistor R1 and the first end of the gas discharge tube FDG1, and the second end of the resistor R1 and the second end of the gas discharge tube FDG1 are connected with the second connecting end.
4. The lightning protection device according to claim 3 wherein the resistor R1 is a glass glaze resistor.
5. The lightning protection device of claim 1, wherein the fourth protection circuit comprises a resistor R2 and a gas discharge tube FDG 2;
the first end of the resistor R2 and the first end of the gas discharge tube FDG2 are connected with each other and then connected with the second end of the second protection circuit and the second end of the third protection circuit, and the second end of the resistor R2 and the second end of the gas discharge tube FDG2 are both connected with the third connection end.
6. The lightning protection device according to claim 5,
the second protection circuit comprises a varistor MOV3 and a varistor MOV 4; the piezoresistor MOV3 and the piezoresistor MOV4 are connected in parallel, one end of the piezoresistor MOV3 is connected with the second end of the fifth protection circuit, and the other end of the piezoresistor MOV4 is connected with the first end of the resistor R2 and the first end of the gas discharge tube FDG 2; and/or
The third protection circuit comprises a voltage dependent resistor MOV5 and a voltage dependent resistor MOV 6; the piezoresistor MOV5 and the piezoresistor MOV6 are connected in parallel, one end of the piezoresistor MOV5 is connected with the second connecting end, and the other end of the piezoresistor MOV6 is connected with the first end of the resistor R2 and the first end of the gas discharge tube FDG 2.
7. The lightning protection device according to claim 5, wherein the resistor R2 is a glass glaze resistor.
8. The lightning protection device of claim 1, wherein the first connection end, the second connection end, and the third connection end each comprise a wire extending a predetermined length outside the housing, the lightning protection device configured to be correspondingly connected to an ac input through the wire.
9. The lightning protection device of claim 8, wherein the wire is soldered to the ac input or the wire is fastened to the ac input via a terminal.
10. An electronic device, characterized in that it comprises a lightning protection device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122978976.4U CN216672592U (en) | 2021-11-29 | 2021-11-29 | Lightning protection device and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122978976.4U CN216672592U (en) | 2021-11-29 | 2021-11-29 | Lightning protection device and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216672592U true CN216672592U (en) | 2022-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122978976.4U Active CN216672592U (en) | 2021-11-29 | 2021-11-29 | Lightning protection device and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216672592U (en) |
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2021
- 2021-11-29 CN CN202122978976.4U patent/CN216672592U/en active Active
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