Lightning protection device detection circuit, lightning protection device detection system and electric equipment

Abstract

The utility model belongs to the technical field of lightning protection, and provides a lightning protection device detection circuit, a lightning protection device detection system and electric equipment. The lightning protection device detection circuit comprises an indication module and n switch modules, the first end of each switch module is connected with the first end of the lightning protection device, the second end of each switch module is connected with the second end of the lightning protection device, the third end of the first switch module is connected with the indication module, and the n switch modules are connected with the indication module. The third end of the a-th switch module is connected with the fourth end of the (a-1)-th switch module, the fourth end of the a-th switch module is connected with the third end of the (a + 1)-th switch module, the fourth end of the n-th switch module is grounded, n is a natural number larger than 1, and a is larger than or equal to 2 and smaller than n. The switch module is switched off when the corresponding lightning protection device is abnormal, and is switched on when the corresponding lightning protection device is qualified; when any one of the switch modules is switched off, the indication module outputs a first indication signal; and when all the switch modules are switched on, the indication module outputs a second indication signal.

Description

Technical Field

[0001] The present application belongs to the field of lightning protection technology, and in particular relates to a lightning protection device detection circuit, a lightning protection device detection system and electrical equipment. Background Art

[0002] Lightning protection devices are often used in lightning protection circuits. Current lightning protection devices, such as varistor devices, generally discharge surge currents of 5 to 20KA. When a larger surge current needs to be discharged, such as tens or even hundreds of KA, multiple lightning protection devices in parallel are usually used in the lightning protection circuit.

[0003] The quality of lightning protection devices directly affects the lightning protection effect of lightning protection circuits. Therefore, how to realize the detection of multiple lightning protection devices in parallel is a current problem. Utility Model Content

[0004] The embodiments of the present application provide a lightning protection device detection circuit, a lightning protection device detection system and an electrical device, which can realize the detection of multiple lightning protection devices connected in parallel.

[0005] In a first aspect, an embodiment of the present application provides a lightning protection device detection circuit, comprising an indication module and n switch modules, wherein the first end of each switch module is used to be electrically connected to the first end of the lightning protection device, the second end of each switch module is used to be electrically connected to the second end of the lightning protection device, the third end of the first switch module is electrically connected to the indication module, the third end of the a-th switch module is electrically connected to the fourth end of the a-1-th switch module, the fourth end of the a-th switch module is electrically connected to the third end of the a+1-th switch module, the fourth end of the n-th switch module is used to be grounded, and the indication module is used to be electrically connected to a power supply, wherein n is a natural number greater than 1, and 2≤a<n;

[0006] The switch module is used to disconnect when the corresponding lightning protection device is abnormal, and to connect when the corresponding lightning protection device is qualified; when any one of the switch modules is disconnected, the indication module is used to output a first indication signal; when all the switch modules are connected, the indication module is used to output a second indication signal.

[0007] In a possible implementation of the first aspect, the switch module includes a photoelectric coupler and a first resistor, the first input end of the photoelectric coupler is electrically connected to the first end of the first resistor, the second end of the first resistor is used to be electrically connected to the first end of the lightning protection device, and the second input end of the photoelectric coupler is used to be electrically connected to the second end of the lightning protection device. In the first switch module, the first output end of the photoelectric coupler is electrically connected to the indication module, in the ath switch module, the first output end of the photoelectric coupler is electrically connected to the fourth end of the a-1th switch module, the second output end of the photoelectric coupler is electrically connected to the third end of the a+1th switch module, and in the nth switch module, the second output end of the photoelectric coupler is used for grounding.

[0008] In a possible implementation manner of the first aspect, the switch module further includes a diode, an anode of the diode is electrically connected to the second input terminal of the photoelectric coupler, and a cathode of the diode is electrically connected to the second end of the lightning protection device.

[0009] In a possible implementation of the first aspect, the indication module includes a light-emitting diode and a second resistor, the anode of the light-emitting diode is electrically connected to the first end of the second resistor, the second end of the second resistor is used to be electrically connected to the power supply, and the cathode of the light-emitting diode is electrically connected to the third end of the first switch module.

[0010] In a possible implementation manner of the first aspect, the indication module includes a buzzer, a first end of the buzzer is used to be electrically connected to the power supply, and a second end of the buzzer is electrically connected to a third end of the first switch module.

[0011] In a second aspect, an embodiment of the present application provides a lightning protection device detection system, comprising a control module and the lightning protection device detection circuit described in any one of the first aspects, wherein the control module is electrically connected to a third end of a first switch module in the lightning protection device detection circuit;

[0012] The switch module in the lightning protection device detection circuit is used to disconnect when the corresponding lightning protection device is abnormal, and to turn on when the corresponding lightning protection device is qualified; when any one of the switch modules is disconnected, the indication module in the lightning protection device detection circuit is used to output a first indication signal to the control module, and the control module is used to determine that one of the n parallel lightning protection devices is abnormal according to the first indication signal; when all the switch modules are turned on, the indication module is used to output a second indication signal to the control module, and the control module is used to determine that all of the n parallel lightning protection devices are qualified according to the second indication signal.

[0013] In a possible implementation manner of the second aspect, the control module includes a controller, and an input / output port of the controller is electrically connected to a third end of the first switch module in the lightning protection device detection circuit.

[0014] In a possible implementation manner of the second aspect, the lightning protection device detection system further includes an alarm module, and the alarm module is electrically connected to the control module;

[0015] The control module is used for outputting an alarm signal to the alarm module upon receiving the first indication signal; and the alarm module is used for sounding an alarm according to the alarm signal.

[0016] In a possible implementation manner of the second aspect, the lightning protection device detection system further includes a wireless transmission module, which is electrically connected to the control module and is used to communicate with a remote control platform.

[0017] In a third aspect, an embodiment of the present application provides an electrical device, comprising the lightning protection device detection system described in any one of the second aspects.

[0018] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0019] An embodiment of the present application provides a lightning protection device detection circuit, including an indication module and n switch modules, wherein the first end of each switch module is used to be electrically connected to the first end of the lightning protection device, the second end of each switch module is used to be electrically connected to the second end of the lightning protection device, the third end of the first switch module is electrically connected to the indication module, the third end of the a-th switch module is electrically connected to the fourth end of the a-1-th switch module, the fourth end of the a-th switch module is electrically connected to the third end of the a+1-th switch module, the fourth end of the n-th switch module is used to be grounded, and the indication module is used to be electrically connected to a power supply, wherein n is a natural number greater than 1, and 2≤a<n.

[0020] The switch module is used to disconnect when the corresponding lightning protection device is abnormal, and to turn on when the corresponding lightning protection device is qualified. When any switch module is disconnected, the indication module is used to output a first indication signal, and the first indication signal is used to indicate that one of the n parallel lightning protection devices is abnormal. When all switch modules are turned on, the indication module is used to output a second indication signal, and the second indication signal is used to indicate that the n parallel lightning protection devices are all qualified. In summary, the lightning protection device detection circuit provided in the embodiment of the present application can realize the detection of n parallel lightning protection devices.

[0021] It can be understood that the beneficial effects of the second to third aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 It is a principle block diagram of a lightning protection device detection circuit provided in an embodiment of the present application;

[0024] Figure 2 It is a circuit connection diagram of a lightning protection device detection circuit provided in an embodiment of the present application;

[0025] Figure 3 is a circuit connection diagram of a lightning protection device detection circuit provided by another embodiment of the present application;

[0026] Figure 4 It is a principle block diagram of a lightning protection device detection system provided by an embodiment of the present application;

[0027] Figure 5 is a principle block diagram of a lightning protection device detection system provided by another embodiment of the present application;

[0028] Figure 6 It is a principle block diagram of a lightning protection device detection system provided in another embodiment of the present application.

[0029] In the figure: 10, lightning protection device detection circuit; 11, switch module; 12, indication module; 20, lightning protection device; 30, power supply; 40, control module; 50, alarm module; 60, wireless transmission module; 70, remote control platform; 5, lightning protection device detection system. DETAILED DESCRIPTION

[0030] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0031] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0032] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0033] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0034] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0035] Lightning protection devices such as varistor devices are usually used in lightning protection circuits to discharge surge currents. In order to discharge larger surge currents, multiple parallel lightning protection devices are generally used in lightning protection circuits. Since the quality of lightning protection devices directly affects the lightning protection effect of lightning protection circuits, how to realize the detection of multiple parallel lightning protection devices is a current problem.

[0036] A varistor device usually has three terminals, a varistor is located between the first and second terminals of the varistor device, and a fuse is located between the second and third terminals of the varistor device. In a lightning protection circuit, the first terminals of multiple parallel varistor devices are electrically connected to the live wire L, and the third terminals of multiple parallel varistor devices are electrically connected to the neutral wire N. When the varistor device is qualified, the second and third terminals of the varistor device are conductive, and when the varistor device is abnormal, the second and third terminals of the varistor device are disconnected. Utilizing the characteristics of the varistor device, an embodiment of the present application provides a lightning protection device detection circuit that can detect multiple parallel lightning protection devices.

[0037] like Figure 1As shown, the lightning protection device detection circuit 10 includes an indication module 12 and n switch modules 11, the first end of each switch module 11 is used to be electrically connected to the first end of the lightning protection device 20, the second end of each switch module 11 is used to be electrically connected to the second end of the lightning protection device 20, the third end of the first switch module 11 is electrically connected to the indication module 12, the third end of the a-th switch module 11 is electrically connected to the fourth end of the a-1-th switch module 11, the fourth end of the a-th switch module 11 is electrically connected to the third end of the a+1-th switch module 11, the fourth end of the n-th switch module 11 is used for grounding, and the indication module 12 is used for electrically connecting to the power supply, wherein n is a natural number greater than 1, and 2≤a<n. It should be noted that the first end of each lightning protection device 20 is electrically connected to the live wire L, and the third end of each lightning protection device 20 is electrically connected to the neutral wire N.

[0038] Specifically, the switch module 11 is used to disconnect when the corresponding lightning protection device 20 is abnormal, and to turn on when the corresponding lightning protection device 20 is qualified. When any switch module 11 is disconnected, the indication module 12 is used to output a first indication signal, and the first indication signal is used to indicate that one of the n parallel lightning protection devices 20 is abnormal. When all the switch modules 11 are turned on, the indication module 12 is used to output a second indication signal, and the second indication signal is used to indicate that the n parallel lightning protection devices 20 are all qualified. In summary, the lightning protection device detection circuit 10 provided in the embodiment of the present application can realize the detection of n parallel lightning protection devices 20.

[0039] Exemplarily, the lightning protection device 20 is a varistor device. The first end of the lightning protection device 20 is the first terminal of the varistor device, the second end of the lightning protection device 20 is the second terminal of the varistor device, and the third end of the lightning protection device 20 is the third terminal of the varistor device.

[0040] It should be noted that when n is equal to 1, the lightning protection device detection circuit 10 provided in the embodiment of the present application is used to detect a lightning protection device 20 .

[0041] like Figure 2As shown, the switch module 11 includes a photoelectric coupler U and a first resistor R1, the first input end of the photoelectric coupler U is electrically connected to the first end of the first resistor R1, the second end of the first resistor R1 is used to be electrically connected to the first end of the lightning protection device 20, the second input end of the photoelectric coupler U is used to be electrically connected to the second end of the lightning protection device 20, in the first switch module 11, the first output end of the photoelectric coupler U is electrically connected to the indication module 12, in the a-th switch module 11, the first output end of the photoelectric coupler U is electrically connected to the fourth end of the a-1-th switch module 11, the second output end of the photoelectric coupler U is electrically connected to the third end of the a+1-th switch module 11, and in the n-th switch module 11, the second output end of the photoelectric coupler U is used for grounding. The first resistor R1 is used for current limiting.

[0042] Specifically, assuming that n parallel lightning protection devices 20 are all qualified, then current flows through the first input terminals of the n photoelectric couplers U, and the n photoelectric couplers U are all turned on, so that the indication module 12 is turned on to the ground and outputs a second indication signal, and the second indication signal is used to indicate that the n parallel lightning protection devices 20 are all qualified.

[0043] Assuming that one of the n parallel lightning protection devices 20 is abnormal, no current flows through the first input terminal of one of the n photoelectric couplers U, and the photoelectric coupler U is disconnected, so that the indication module 12 is disconnected from the ground and outputs a first indication signal, and the first indication signal is used to indicate that one of the n parallel lightning protection devices 20 is abnormal.

[0044] like Figure 3 As shown, the switch module 11 further includes a diode D, the anode of the diode D is electrically connected to the second input terminal of the photoelectric coupler U, and the cathode of the diode D is electrically connected to the second terminal of the lightning protection device 20. The diode D is used to prevent the reverse current in the circuit from damaging the photoelectric coupler U.

[0045] like Figure 2 As shown, the indicator module 12 includes a light emitting diode LED and a second resistor R2, the anode of the light emitting diode LED is electrically connected to the first end of the second resistor R2, the second end of the second resistor R2 is used to be electrically connected to the power supply 30, and the cathode of the light emitting diode LED is electrically connected to the third end of the first switch module 11. The second resistor R2 is used for current limiting. Figure 2 It can be known that the cathode of the light emitting diode LED is electrically connected to the first output end of the photoelectric coupler U in the first switch module 11 .

[0046] Specifically, assuming that n parallel lightning protection devices 20 are all qualified, then current flows through the first input terminals of the n photoelectric couplers U, and the n photoelectric couplers U are all turned on, so that the light-emitting diodes LED are connected to the ground and emit light, and at the same time, a second indication signal is output, and the second indication signal is used to indicate that the n parallel lightning protection devices 20 are all qualified. The second indication signal is a sine wave signal of a positive half period.

[0047] It can be seen from the above that when the light emitting diode LED emits light, it means that the n lightning protection devices 20 connected in parallel are all qualified.

[0048] Assuming that one of the n parallel lightning protection devices 20 is abnormal, no current flows through the first input terminal of one of the n photoelectric couplers U, and the photoelectric coupler U is disconnected, so that the light-emitting diode LED is disconnected from the ground and extinguished, and a first indication signal is output at the same time, and the first indication signal is used to indicate that one of the n parallel lightning protection devices 20 is abnormal. The first indication signal is a high-level signal.

[0049] It can be seen from the above that when the light emitting diode LED is off, it means that one of the n lightning protection devices 20 connected in parallel is abnormal.

[0050] Exemplarily, the indicating module 12 includes a buzzer, a first end of the buzzer is used to be electrically connected to the power source 30 , and a second end of the buzzer is electrically connected to the third end of the first switch module 11 .

[0051] Specifically, assuming that n parallel lightning protection devices 20 are all qualified, then current flows through the first input terminals of the n photoelectric couplers U, and the n photoelectric couplers U are all turned on, so that the buzzer is connected to the ground and emits a sound, and at the same time outputs a second indication signal, which is used to indicate that the n parallel lightning protection devices 20 are all qualified. The second indication signal is a sine wave signal of a positive half period.

[0052] As can be seen from the above, when the buzzer makes a sound, it means that the n lightning protection devices 20 connected in parallel are all qualified.

[0053] Assuming that one of the n parallel lightning protection devices 20 is abnormal, no current flows through the first input terminal of one of the n photoelectric couplers U, and the photoelectric coupler U is disconnected, so that the buzzer is disconnected from the ground, stops making sounds, and outputs a first indication signal, which is used to indicate that one of the n parallel lightning protection devices 20 is abnormal. The first indication signal is a high-level signal.

[0054] As can be seen from the above, when the buzzer stops making sound, it means that one of the n lightning protection devices 20 connected in parallel is abnormal.

[0055] In summary, the lightning protection device detection circuit 10 provided in the embodiment of the present application can realize the detection of n lightning protection devices 20 connected in parallel.

[0056] The present application also provides a lightning protection device detection system. Figure 4 As shown, the lightning protection device detection system 5 includes a control module 40 and the above-mentioned lightning protection device detection circuit 10 , and the control module 40 is electrically connected to the third end of the first switch module 11 in the lightning protection device detection circuit 10 .

[0057] Specifically, the switch module 11 in the lightning protection device detection circuit 10 is used to be disconnected when the corresponding lightning protection device 20 is abnormal, and to be turned on when the corresponding lightning protection device 20 is qualified.

[0058] When any switch module 11 is disconnected, the indication module 12 in the lightning protection device detection circuit 10 is used to output a first indication signal to the control module 40, and the control module 40 is used to determine that one of the n parallel lightning protection devices 20 is abnormal according to the first indication signal.

[0059] When all the switch modules 11 are turned on, the indication module 12 is used to output a second indication signal to the control module 40 , and the control module 40 is used to determine that the n parallel lightning protection devices 20 are all qualified according to the second indication signal.

[0060] Exemplarily, the control module 40 includes a controller, and an input / output port (ie, an I / O port) of the controller is electrically connected to the third end of the first switch module 11 in the lightning protection device detection circuit 10 .

[0061] like Figure 5 As shown, the lightning protection device detection system 5 further includes an alarm module 50 , and the alarm module 50 is electrically connected to the control module 40 .

[0062] Specifically, the control module 40 is used to output an alarm signal to the alarm module 50 when receiving the first indication signal. The alarm module 50 is used to alarm according to the alarm signal.

[0063] Exemplarily, the alarm module 50 includes an audible and visual alarm.

[0064] like Figure 6 As shown, the lightning protection device detection system 5 further includes a wireless transmission module 60 , which is electrically connected to the control module 60 , and the wireless transmission module 60 is used to communicate with the remote control platform 70 .

[0065] Specifically, the control module 40 is used to output a first control signal to the wireless transmission module 60 when receiving a first indication signal. The wireless transmission module 60 is used to send a first wireless signal to the remote control platform 70 according to the first control signal, and the first wireless signal is used to indicate that one of the n parallel lightning protection devices 20 is abnormal. The control module 40 is used to output a second control signal to the wireless transmission module 60 when receiving a second indication signal. The wireless transmission module 60 is used to send a second wireless signal to the remote control platform 70 according to the second control signal, and the second wireless signal is used to indicate that the n parallel lightning protection devices 20 are all qualified. In this way, the user can monitor the status of the n parallel lightning protection devices 20 on the remote control platform 70.

[0066] Exemplarily, the wireless transmission module 60 includes a Wi-Fi module, a Bluetooth module, a ZigBee module, or the like.

[0067] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such 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 application, and should all be included in the protection scope of the present application.

Claims

1. A lightning protection device detection circuit, characterized in that: It comprises an indication module and n switch modules, wherein the first end of each switch module is used to be electrically connected to the first end of a lightning protection device, the second end of each switch module is used to be electrically connected to the second end of the lightning protection device, the third end of the first switch module is electrically connected to the indication module, the third end of the a-th switch module is electrically connected to the fourth end of the a-1-th switch module, the fourth end of the a-th switch module is electrically connected to the third end of the a+1-th switch module, the fourth end of the n-th switch module is used to be grounded, and the indication module is used to be electrically connected to a power supply, wherein n is a natural number greater than 1, and 2≤a<n; The switch module is used to disconnect when the corresponding lightning protection device is abnormal, and to connect when the corresponding lightning protection device is qualified; when any one of the switch modules is disconnected, the indication module is used to output a first indication signal; when all the switch modules are connected, the indication module is used to output a second indication signal.

2. The lightning protection device detection circuit according to claim 1, characterized in that: The switch module includes a photoelectric coupler and a first resistor, wherein the first input end of the photoelectric coupler is electrically connected to the first end of the first resistor, the second end of the first resistor is used to be electrically connected to the first end of the lightning protection device, and the second input end of the photoelectric coupler is used to be electrically connected to the second end of the lightning protection device. In the first switch module, the first output end of the photoelectric coupler is electrically connected to the indication module, in the ath switch module, the first output end of the photoelectric coupler is electrically connected to the fourth end of the a-1th switch module, the second output end of the photoelectric coupler is electrically connected to the third end of the a+1th switch module, and in the nth switch module, the second output end of the photoelectric coupler is used for grounding.

3. The lightning protection device detection circuit according to claim 2, characterized in that: The switch module further comprises a diode, an anode of the diode is electrically connected to the second input terminal of the photoelectric coupler, and a cathode of the diode is electrically connected to the second terminal of the lightning protection device.

4. The lightning protection device detection circuit according to claim 1, characterized in that: The indicating module includes a light emitting diode and a second resistor, wherein the anode of the light emitting diode is electrically connected to the first end of the second resistor, the second end of the second resistor is used to be electrically connected to the power supply, and the cathode of the light emitting diode is electrically connected to the third end of the first switch module.

5. The lightning protection device detection circuit according to claim 1, characterized in that: The indicating module comprises a buzzer, a first end of the buzzer is used to be electrically connected to the power supply, and a second end of the buzzer is electrically connected to a third end of the first switch module.

6. A lightning protection device detection system, characterized in that: It comprises a control module and the lightning protection device detection circuit according to any one of claims 1 to 5, wherein the control module is electrically connected to the third end of the first switch module in the lightning protection device detection circuit; The switch module in the lightning protection device detection circuit is used to disconnect when the corresponding lightning protection device is abnormal, and to turn on when the corresponding lightning protection device is qualified; when any one of the switch modules is disconnected, the indication module in the lightning protection device detection circuit is used to output a first indication signal to the control module, and the control module is used to determine that one of the n parallel lightning protection devices is abnormal according to the first indication signal; when all the switch modules are turned on, the indication module is used to output a second indication signal to the control module, and the control module is used to determine that all of the n parallel lightning protection devices are qualified according to the second indication signal.

7. The lightning protection device detection system according to claim 6, characterized in that: The control module comprises a controller, and an input / output port of the controller is electrically connected to a third end of the first switch module in the lightning protection device detection circuit.

8. The lightning protection device detection system according to claim 6, characterized in that: The lightning protection device detection system further comprises an alarm module, and the alarm module is electrically connected to the control module; The control module is used for outputting an alarm signal to the alarm module upon receiving the first indication signal; and the alarm module is used for sounding an alarm according to the alarm signal.

9. The lightning protection device detection system according to claim 6, characterized in that: The lightning protection device detection system also includes a wireless transmission module, which is electrically connected to the control module and is used to communicate with a remote control platform.

10. An electrical device, characterized in that: A lightning protection device detection system comprising the lightning protection device detection system according to any one of claims 6 to 9.

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