CN217545566U - Anti-surge protection circuit and power utilization system - Google Patents

Abstract

The application provides an anti-surge protection circuit and a power utilization system, wherein the anti-surge protection circuit comprises a surge detection unit, a surge blocking unit, a switch and a single chip microcomputer; the first end of the surge detection unit is respectively and electrically connected with an alternating-current voltage source and external electric equipment; the first end of the surge blocking unit is respectively and electrically connected with an alternating-current voltage source and external electric equipment; the first end of singlechip is connected with the second end electricity of surge detecting element, the second end of singlechip is connected with the second end electricity of surge blocking element, second end output low level signal or high level signal through the surge detecting element, whether make the second end of singlechip export conduction current, under the condition that the second end of singlechip exports conduction current, make outside consumer be connected with the voltage source electricity, under the condition that the second end of singlechip does not export conduction current, make outside consumer break off with the voltage source, thereby the problem that surge current can't be blocked completely to current scheme has been solved.

Description

Anti-surge protection circuit and power utilization system

Technical Field

The application relates to the technical field of protection circuits, in particular to an anti-surge protection circuit and an electric system.

Background

With the rapid development of economy and diversified application scenes, the household requirements of high-power lamps and household appliances are increasing day by day, and intelligent homes slowly enter into the living application of people. At present, large capacitors are integrated in electronic equipment in lamps and household appliances on the market, and a user can have great risk of generating surge current when the electronic equipment is started for use every time without other protection (the starting capacitor needs to be charged, voltage cannot suddenly change, and current suddenly changes). Especially, when a plurality of household appliances are simultaneously turned on by using a wall switch or an intelligent switch, the generated surge current can be superposed on the household mains supply, the damage is the greatest at the moment, the time of starting the household appliances is very short, but the peak value is very large, and the switch can possibly generate a sparking phenomenon to a certain extent, even the switch is tripped during idle opening. The existing scheme can not completely block surge current.

SUMMERY OF THE UTILITY MODEL

The application mainly aims to provide an anti-surge protection circuit and an electricity utilization system to solve the problem that the existing scheme can not completely block surge current.

In order to achieve the above object, according to one aspect of the present application, there is provided an anti-surge protection circuit including a surge detection unit, a surge blocking unit, a switch, and a single chip microcomputer; the surge detection unit is provided with a first end and a second end, the first end of the surge detection unit is respectively and electrically connected with an alternating current voltage source and external electric equipment, the surge detection unit is used for detecting whether surge current flows into the alternating current voltage source, and the second end of the surge detection unit outputs a low-level signal under the condition that the surge current exists; the surge blocking unit is provided with a first end and a second end, and the first end of the surge blocking unit is electrically connected with the alternating-current voltage source and the external electric equipment respectively; the switch has a first state and a second state and is electrically connected with the external electric equipment; the single chip microcomputer is provided with a first end, a second end and a third end, the first end of the single chip microcomputer is electrically connected with the second end of the surge detection unit, the second end of the single chip microcomputer is electrically connected with the second end of the surge blocking unit, the third end of the single chip microcomputer is electrically connected with the switch, the switch is switched from the first state to the second state or switched from the second state to the first state, and under the condition that the second end of the surge detection unit outputs a low-level signal, the third end of the single chip microcomputer does not output an electric signal, so that the surge blocking unit breaks a path between the alternating-current voltage source and the external electric equipment electric connection.

Furthermore, the surge detection unit comprises a first diode, a first resistance module, a second diode, an optical coupler, an energy storage control module and a first capacitor module, wherein the anode of the first diode is electrically connected with the live wire end of the alternating current voltage source and the external electric equipment respectively, the cathode of the first diode is electrically connected with the first end of the first resistance module, the second end of the first resistance module is electrically connected with the first input end of the optical coupler and the cathode of the second diode respectively, the anode of the second diode is electrically connected with the second input end of the optical coupler, the neutral wire end of the alternating current voltage source and the external electric equipment respectively, the first output end of the optical coupler, the first end of the energy storage control module and the first end of the first capacitor module are grounded respectively, the second output end of the optical coupler is electrically connected with the second end of the energy storage control module, the second end of the first capacitor module is electrically connected with the second end of the energy storage control module and the first end of the single chip microcomputer control module, and the fourth end of the single chip microcomputer control module are electrically connected with the direct current power source.

Further, the energy storage control module comprises a second resistance module, a third resistance module, a fourth resistance module, a fifth resistance module and a first triode, an emitting electrode of the first triode is respectively electrically connected with a first end of the second resistance module and a direct current power supply, a base electrode of the first triode is respectively electrically connected with a second end of the second resistance module and a first end of the third resistance module, a second end of the third resistance module is electrically connected with a second output end of the optical coupler, a collector electrode of the first triode is respectively electrically connected with a first end of the fourth resistance module and a first end of the fifth resistance module, a second end of the fourth resistance module is grounded, and a second end of the fifth resistance module is respectively electrically connected with a second end of the first capacitance module and a first end of the single chip microcomputer.

Further, the surge blocking unit comprises a second triode, a sixth resistor module, a third diode, a relay and a seventh resistor module, wherein the base of the second triode is electrically connected with the first end of the sixth resistor module, the second end of the sixth resistor module is electrically connected with the second end of the single chip microcomputer, the emitting electrode of the second triode is grounded, the collecting electrode of the second triode is electrically connected with the anode of the third diode and the first control end of the relay respectively, the cathode of the third diode is electrically connected with the first end of the seventh resistor module and the second control end of the relay respectively, the second end of the seventh resistor module is electrically connected with a direct-current power supply, and the turn-off end of the relay is electrically connected with the live wire end of the alternating-current voltage source and the external electric equipment respectively.

Furthermore, the anti-surge protection circuit further comprises a power supply unit, wherein the power supply unit is provided with an input end and an output end, the input end of the power supply unit is electrically connected with the alternating current voltage source, and the output end of the power supply unit is respectively electrically connected with the surge blocking unit, the single chip microcomputer and the surge detection unit.

Further, the power supply unit comprises a rectifier bridge, a second capacitor module, a third capacitor module, an electrolytic capacitor module, a control module, a fourth diode, a fifth diode, an energy storage inductor, an eighth resistor module and a ninth resistor module, the first input end of the rectifier bridge is respectively and electrically connected with the live wire end of the alternating current voltage source, the first input end of the external electric equipment and the second end of the surge blocking unit, a second input end of the rectifier bridge is respectively connected with the first end of the surge detection unit, the zero line end of the alternating current voltage source and a second input end of the external electric equipment, the first output end of the rectifier bridge is respectively and electrically connected with the first end of the second capacitor module, the first end of the third capacitor module and the turn-off end of the control module, the acquisition end of the control module is electrically connected with the first end of the eighth resistor module, the second end of the eighth resistor module is respectively electrically connected with the first end of the energy storage inductor, the cathode of the fourth diode, the grounding end of the control module and the first end of the third capacitor module, the second end of the third capacitor module is electrically connected with the power supply end of the control module, the receiving end of the control module is electrically connected with the cathode of the fifth diode, the anode of the fifth diode is electrically connected with the first end of the electrolytic capacitor module, the first end of the ninth resistor module, the power supply end of the surge blocking unit, the power supply end of the singlechip and the power supply end of the surge detection unit respectively, the second end of the electrolytic capacitor module, the second end of the ninth resistor module, the second end of the third capacitor module, the second end of the second capacitor module and the second output end of the rectifier bridge are respectively grounded.

Furthermore, the power supply unit further includes a fourth capacitor module and a fifth capacitor module, a first end of the fourth capacitor module is electrically connected to the turn-off end of the control module, a second end of the fourth capacitor module is electrically connected to the anode of the fifth diode and the first end of the fifth capacitor module, and a second end of the fifth capacitor module is grounded.

Furthermore, the surge detection unit further includes a sixth capacitor module, a first end of the sixth capacitor module is electrically connected to the emitter of the first triode, the first end of the second resistor module, and the dc power supply, respectively, and a second end of the sixth capacitor module is grounded.

Further, the first resistance module comprises a first resistance, a second resistance and a third resistance which are sequentially connected in series, the first resistance is further electrically connected with the cathode of the first diode, and the third resistance is further electrically connected with the first input end of the optical coupler and the cathode of the second diode respectively.

According to another aspect of the present application, there is provided an electric system including any one of the anti-surge protection circuits.

Use the technical scheme of this application, low level signal or high level signal are exported through surge detecting element's second end, whether the second end that makes the singlechip exports conduction current, under the second end output conduction current's of singlechip condition, make outside consumer be connected with the voltage source electricity, under the second end condition of not exporting conduction current of singlechip, make outside consumer break off with the voltage source, thereby solved the problem that the surge current can't be blocked completely to current scheme.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:

FIG. 1 shows a schematic diagram of an anti-surge protection circuit according to an embodiment of the application;

fig. 2 shows a schematic diagram of a single chip according to an embodiment of the application.

Wherein the figures include the following reference numerals:

10. a surge detection unit; 11. an energy storage control module; 20. a surge blocking unit; 30. a switch; 40. a single chip microcomputer; 50. an external power consumer; 60. a power supply unit.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.

As described in the background art, in the existing scheme, a plurality of household appliances are simultaneously turned on by using a wall switch or an intelligent switch, surge current generated by each household appliance is superposed on mains supply of the household appliances, the damage generated at the moment is the largest, the time of starting the household appliances is very short, but the peak value is very large, and the switch may generate a sparking phenomenon to a certain extent, even cause idle-switch tripping. The surge current can not be blocked completely by the existing scheme, and the surge current can not be blocked completely by the existing scheme.

An embodiment of the present application provides an anti-surge protection circuit, as shown in fig. 1, the anti-surge protection circuit includes a surge detection unit 10, a surge blocking unit 20, a switch 30, and a single chip microcomputer 40; the surge detection unit 10 has a first end and a second end, the first end of the surge detection unit 10 is electrically connected to an ac voltage source and an external electric device 50, respectively, the surge detection unit 10 is configured to detect whether or not a surge current flows into the ac voltage source (for example, 220V), and the second end of the surge detection unit 10 outputs a low level signal when the surge current flows; a surge blocking unit 20 having a first end and a second end, the first end of the surge blocking unit 20 being electrically connected to the ac voltage source and the external electrical equipment 50, respectively; the switch 30 has a first state and a second state, and is electrically connected to the external electric device 50; the single chip microcomputer 40 has a first terminal, a second terminal, and a third terminal, the first terminal INPUT of the single chip microcomputer 40 is electrically connected to the second terminal of the surge detection unit 10, the second terminal OUTPUT of the single chip microcomputer 40 is electrically connected to the second terminal of the surge blocking unit 20, the third terminal of the single chip microcomputer 40 is electrically connected to the switch 30, and when the switch 30 is switched from the first state to the second state or from the second state to the first state and the second terminal of the surge detection unit 10 OUTPUTs a low level signal, the third terminal of the single chip microcomputer 40 does not OUTPUT an electrical signal, so that the surge blocking unit 20 disconnects a path between the ac voltage source and the external electrical device 50.

Among the above-mentioned anti-surge protection circuit, output low level signal or high level signal through surge detecting element's second end, make the second end of singlechip whether export the conduction current, under the second end of singlechip exports the condition of conduction current, make outside consumer be connected with the voltage source electricity, under the second end condition of not exporting the conduction current of singlechip, make outside consumer break off with the voltage source, thereby solved the problem that the surge current can't be blocked completely to current scheme. The power is small, the power of the whole machine is improved, the surge current is detected in real time, and the reliability is high.

In an embodiment of the present application, as shown in fig. 1, the surge detecting unit 10 includes a first diode D1, a first resistor module, a second diode DZ1, an optical coupler U1, an energy storage control module 11, and a first capacitor module C1, wherein an anode of the first diode D1 is electrically connected to a live line terminal L of the ac voltage source and the external electric device 50, a cathode of the first diode D1 is electrically connected to a first terminal of the first resistor module, a second terminal of the first resistor module is electrically connected to a first INPUT terminal of the optical coupler U1 and a cathode of the second diode DZ1, an anode of the second diode DZ1 is electrically connected to a second INPUT terminal of the optical coupler U1, a neutral line terminal N of the ac voltage source and the external electric device 50, a first output terminal of the optical coupler U1, a first terminal of the energy storage control module 11, and a first terminal of the first capacitor module C1 are grounded, a second output terminal of the optical coupler U1 is electrically connected to a first terminal of the energy storage control module 11, a first terminal of the energy storage control module C1 is electrically connected to a first terminal of the dc power source, and a fourth terminal of the single chip microcomputer control module 40 are electrically connected to the first capacitor module C1.

As shown in fig. 2, the single chip microcomputer 40 includes a logic circuit of an and gate, a first input terminal of the and gate is electrically connected to a switch, a second input terminal of the and gate is electrically connected to a second terminal of a surge detection unit, an output terminal of the and gate is electrically connected to a second terminal of the surge blocking unit, when the and gate receives a signal that the switch is switched from the first state to the second state or a signal that the switch is switched from the second state to the first state and the second terminal of the surge detection unit outputs a low level signal, the output terminal of the and gate does not output an electrical signal, so that the surge blocking unit breaks a path between the ac voltage source and the external electrical device, and when the and gate receives a signal that the switch is switched from the first state to the second state or a signal that the switch is switched from the second state to the first state and the second terminal of the surge detection unit outputs a high level, the output terminal of the and gate outputs an electrical signal, so that the blocking unit is electrically connected to a path between the ac voltage source and the external electrical device, thereby turning on the external electrical device.

In an embodiment of the present application, as shown in fig. 1, the energy storage control module 11 includes a second resistor module R4, a third resistor module R5, a fourth resistor module R7, a fifth resistor module R6, and a first transistor Q1, wherein an emitter of the first transistor Q1 is electrically connected to the first end of the second resistor module R4 and the dc power supply, a base of the first transistor Q1 is electrically connected to the second end of the second resistor module R4 and the first end of the third resistor module R5, a second end of the third resistor module R5 is electrically connected to the second output end of the optical coupler U1, a collector of the first transistor Q1 is electrically connected to the first end of the fourth resistor module R7 and the first end of the fifth resistor module R6, a second end of the fourth resistor module R7 is grounded, and a second end of the fifth resistor module R6 is electrically connected to the second end of the first capacitor module C1 and the first end of the INPUT of the single chip 40.

Specifically, when the voltage difference exists between the live wire end and the zero line end, the live wire end supplies power to the input end of the optical coupler through the first diode and the current limitation of the first resistance module, wherein the second diode is a voltage stabilizing diode, protects the optical coupler and prevents the voltage of the input end from being too high. When current passes through the input end of the optical coupler, the output end is conducted, the voltage of the base electrode of the first triode is pulled down, the first triode is conducted, the first capacitor module starts to store energy, and the fifth resistor module outputs a high-level signal to the single chip microcomputer; when no voltage difference exists between the live wire end and the zero wire end (the phase of the commercial power is 0 degree), the input end of the optical coupler has no current, the two output ends of the optical coupler are disconnected, the first triode is disconnected, the first capacitor module has no current to store energy, and the fifth resistor module outputs a low level signal.

In one embodiment of the present invention, as shown in fig. 1, the surge blocking unit 20 includes a second transistor Q3, a sixth resistor block R9, a third diode D2, a relay RS1, and a seventh resistor block R8, wherein a base of the second transistor Q3 is electrically connected to a first end of the sixth resistor block R9, a second end of the sixth resistor block R9 is electrically connected to a second end OUTPUT of the single-chip microcomputer 40, an emitter of the second transistor Q3 is grounded, a collector of the second transistor Q3 is electrically connected to an anode of the third diode D2 and a first control end of the relay RS1, respectively, a cathode of the third diode D2 is electrically connected to a first end of the seventh resistor block R8 and a second control end of the relay RS1, a second end of the seventh resistor block R8 is electrically connected to a dc power source, and a turn-off end of the relay RS1 is electrically connected to a fire line L of the ac voltage source and the external electrical equipment 50, respectively. When the single chip microcomputer 40 outputs an electric signal, the second triode Q3 is conducted, so that the relay RS1 is magnetically attracted, the relay RS1 electrically connects the alternating current voltage source and the external electric equipment 50 together, when the single chip microcomputer 40 does not output an electric signal, the second triode Q3 is not conducted, the relay RS1 is not magnetically attracted, the alternating current voltage source and the external electric equipment 50 are disconnected, and surge current is completely blocked.

Specifically, the single chip microcomputer outputs and controls the electronic switch module (the surge blocking unit can also be a relay, a silicon controlled rectifier, an IGBT and the like) through high and low level signal input judgment to prevent surge current.

In an embodiment of the present invention, as shown in fig. 1, the anti-surge protection circuit further includes a power supply unit 60, the power supply unit 60 has an input terminal and an output terminal, the input terminal of the power supply unit 60 is electrically connected to the ac voltage source, and the output terminal of the power supply unit 60 is electrically connected to the surge blocking unit 20, the single chip microcomputer 40, and the surge detection unit 10, respectively. The power supply unit 60 supplies power to the surge blocking unit 20, the single chip microcomputer 40, and the surge detection unit 10.

In one embodiment of the present application, as shown in fig. 1, the power supply unit 60 includes a rectifier bridge DB1, a second capacitor module C6, a third capacitor module C5, an electrolytic capacitor module CE1, a control module U2, a fourth diode D3, a fifth diode D4, an energy storage inductor L6, an eighth resistor module R10, and a ninth resistor module R11, a first input end of the rectifier bridge DB1 is electrically connected to a live terminal L of the ac voltage source, a first input end of the external electric device 50, and a second end of the surge blocking unit 20, a second input end of the rectifier bridge DB1 is electrically connected to a first end of the surge detection unit 10, a neutral terminal N of the ac voltage source, and a second input end of the external electric device 50, a first output end of the rectifier bridge DB1 is electrically connected to a first end of the second capacitor module C6, a first end of the third capacitor module C5, and a blocking terminal of the control module U2, a collecting terminal CS of the control module U2 is electrically connected to a negative terminal of the second capacitor module R10, a first terminal of the eighth capacitor module R10, a negative terminal R2 is electrically connected to a negative terminal of the capacitor module R2, a negative terminal of the control module R2, a negative terminal of the capacitor module R5 and a negative terminal of the control module R2 is electrically connected to a negative terminal of the rectifier bridge D5, a third capacitor module R5, a third capacitor module D5 is electrically connected to a positive terminal of the rectifier bridge D5, a third capacitor module D5 and a negative terminal of the surge detection module R5, a second end of the electrolytic capacitor module CE1, a second end of the ninth resistor module R11, a second end of the third capacitor module C5, a second end of the second capacitor module C6, and a second output terminal of the rectifier bridge DB1 are grounded, respectively. The anti-surge protection circuit further comprises a fuse F1, wherein the fuse F1 is electrically connected between the alternating current voltage source and the first input end of the rectifier bridge DB1 and plays a role of protecting the circuit.

In an embodiment of the present application, as shown in fig. 1, the power supply unit 60 further includes a fourth capacitor module C3 and a fifth capacitor module C4, a first end of the fourth capacitor module C3 is electrically connected to the shutdown end DRAIN of the control module U2, a second end of the fourth capacitor module C3 is electrically connected to an anode of the fifth diode D4 and a first end of the fifth capacitor module C4, respectively, and a second end of the fifth capacitor module C4 is grounded. The fourth capacitor module C3 and the fifth capacitor module C4 both function to stabilize voltage.

In an embodiment of the present invention, as shown in fig. 1, the surge detecting unit 10 further includes a sixth capacitor module C2, a first end of the sixth capacitor module C2 is electrically connected to the emitter of the first transistor Q1, a first end of the second resistor module R4, and the dc power supply, respectively, and a second end of the sixth capacitor module C2 is grounded. The sixth capacitor module C2 functions as a voltage regulator.

In an embodiment of the present application, as shown in fig. 1, the first resistor module includes a first resistor R1, a second resistor R2, and a third resistor R3 connected in series in sequence, the first resistor R1 is further electrically connected to the cathode of the first diode D1, and the third resistor R3 is further electrically connected to the first input terminal of the optocoupler U1 and the cathode of the second diode DZ1, respectively.

The first resistor R1, the second resistor R2 and the third resistor R3 play a role in voltage limiting.

An embodiment of the present application further provides an electric system, which includes any one of the above-described anti-surge protection circuits. Whether the second end of the single chip microcomputer outputs the conduction current or not is judged by outputting a low level signal or a high level signal through the second end of the surge detection unit, the external electric equipment is electrically connected with the voltage source under the condition that the second end of the single chip microcomputer outputs the conduction current, and the external electric equipment is disconnected with the voltage source under the condition that the second end of the single chip microcomputer does not output the conduction current, so that the problem that the surge current cannot be completely blocked by the existing scheme is solved.

It should be noted that the above electrical connection may be a direct electrical connection or an indirect electrical connection, where a direct electrical connection means that two devices are directly connected, and an indirect electrical connection means that other devices, such as a capacitor and a resistor, are also connected between a and B that are connected.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:

1) The utility model provides an anti-surge protection circuit, output low level signal or high level signal through surge detecting element's second end, whether make the second end of singlechip export conduction current, under the second end output conduction current's of singlechip condition, make outside consumer be connected with the voltage source electricity, under the second end condition of not exporting conduction current of singlechip, make outside consumer break off with the voltage source, thereby solved the problem that the surge current can't be blocked completely to current scheme.

2) The utility model provides an electrical system, output low level signal or high level signal through surge detecting element's second end, whether the second end that makes the singlechip exports conduction current, under the second of singlechip end output conduction current's the condition, make outside consumer be connected with the voltage source electricity, under the second of singlechip end condition of not exporting conduction current, make outside consumer break off with the voltage source, thereby the problem that surge current can't be blocked completely to current scheme has been solved.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. An anti-surge protection circuit, comprising:

the surge detection unit is provided with a first end and a second end, the first end of the surge detection unit is respectively and electrically connected with an alternating current voltage source and external electric equipment, the surge detection unit is used for detecting whether surge current flows into the alternating current voltage source, and the second end of the surge detection unit outputs a low-level signal under the condition that the surge current flows;

the surge blocking unit is provided with a first end and a second end, and the first end of the surge blocking unit is respectively and electrically connected with the alternating-current voltage source and the external electric equipment;

a switch having a first state and a second state and electrically connected to the external power consumption device;

the single chip microcomputer is provided with a first end, a second end and a third end, the first end of the single chip microcomputer is electrically connected with the second end of the surge detection unit, the second end of the single chip microcomputer is electrically connected with the second end of the surge blocking unit, the third end of the single chip microcomputer is electrically connected with the switch, the switch is switched to the second state from the first state or switched to the first state from the second state, and under the condition that the second end of the surge detection unit outputs a low-level signal, the third end of the single chip microcomputer does not output an electric signal, so that the surge blocking unit breaks a path between the alternating-current voltage source and the external electric equipment electric connection.

2. The anti-surge protection circuit according to claim 1, wherein said surge detection unit comprises: the energy storage device comprises a first diode, a first resistance module, a second diode, an optical coupler, an energy storage control module and a first capacitor module, wherein the anode of the first diode is electrically connected with the live wire end of an alternating current voltage source and external electric equipment respectively, the cathode of the first diode is electrically connected with the first end of the first resistance module, the second end of the first resistance module is electrically connected with the first input end of the optical coupler and the cathode of the second diode respectively, the anode of the second diode is electrically connected with the second input end of the optical coupler, the zero wire end of the alternating current voltage source and the external electric equipment respectively, the first output end of the optical coupler, the first end of the energy storage control module and the first end of the first capacitor module are grounded respectively, the second output end of the optical coupler is electrically connected with the second end of the energy storage control module, the second end of the first capacitor module is electrically connected with the third end of the energy storage control module and the first end of the energy storage control module respectively, and the fourth end of the energy storage control module is electrically connected with a direct current power source.

3. The anti-surge protection circuit according to claim 2, wherein the energy storage control module comprises: the second resistor module, the third resistor module, the fourth resistor module, the fifth resistor module and the first triode, the emitting electrode of the first triode is respectively electrically connected with the first end of the second resistor module and the direct-current power supply, the base electrode of the first triode is respectively electrically connected with the second end of the second resistor module and the first end of the third resistor module, the second end of the third resistor module is electrically connected with the second output end of the optical coupler, the collecting electrode of the first triode is respectively electrically connected with the first end of the fourth resistor module and the first end of the fifth resistor module, the second end of the fourth resistor module is grounded, and the second end of the fifth resistor module is respectively electrically connected with the second end of the first capacitor module and the first end of the single chip microcomputer.

4. The anti-surge protection circuit according to claim 1, wherein the surge blocking unit comprises: the base of the second triode is electrically connected with the first end of the sixth resistance module, the second end of the sixth resistance module is electrically connected with the second end of the single chip microcomputer, the emitting electrode of the second triode is grounded, the collecting electrode of the second triode is respectively electrically connected with the anode of the third diode and the first control end of the relay, the cathode of the third diode is respectively electrically connected with the first end of the seventh resistance module and the second control end of the relay, the second end of the seventh resistance module is electrically connected with the direct-current power supply, and the turn-off end of the relay is respectively electrically connected with the live wire end of the alternating-current voltage source and the external electric equipment.

5. The anti-surge protection circuit according to claim 1, further comprising:

and the power supply unit is provided with an input end and an output end, the input end of the power supply unit is electrically connected with the alternating current voltage source, and the output end of the power supply unit is respectively electrically connected with the surge blocking unit, the single chip microcomputer and the surge detection unit.

6. The surge protection circuit according to claim 5, wherein said power supply unit comprises: a rectifier bridge, a second capacitor module, a third capacitor module, an electrolytic capacitor module, a control module, a fourth diode, a fifth diode, an energy storage inductor, an eighth resistor module and a ninth resistor module, the first input end of the rectifier bridge is respectively and electrically connected with a live wire end of the alternating current voltage source, the first input end of the external electric equipment and the second end of the surge blocking unit, a second input end of the rectifier bridge is respectively connected with the first end of the surge detection unit, the zero line end of the alternating current voltage source and a second input end of the external electric equipment, the first output end of the rectifier bridge is respectively and electrically connected with the first end of the second capacitor module, the first end of the third capacitor module and the turn-off end of the control module, the acquisition end of the control module is electrically connected with the first end of the eighth resistor module, the second end of the eighth resistor module is electrically connected with the first end of the energy storage inductor, the cathode of the fourth diode, the grounding end of the control module and the first end of the third capacitor module respectively, the second end of the third capacitor module is electrically connected with the power supply end of the control module, the receiving end of the control module is electrically connected with the cathode of the fifth diode, the anode of the fifth diode is respectively and electrically connected with the first end of the electrolytic capacitor module, the first end of the ninth resistor module, the power supply end of the surge blocking unit, the power supply end of the singlechip and the power supply end of the surge detection unit, the second end of the electrolytic capacitor module, the second end of the ninth resistor module, the second end of the third capacitor module, the second end of the second capacitor module and the second output end of the rectifier bridge are respectively grounded.

7. The anti-surge protection circuit according to claim 6, wherein the power supply unit further comprises: the first end of the fourth capacitor module is electrically connected with the turn-off end of the control module, the second end of the fourth capacitor module is electrically connected with the anode of the fifth diode and the first end of the fifth capacitor module respectively, and the second end of the fifth capacitor module is grounded.

8. The anti-surge protection circuit according to claim 3, wherein the surge detection unit further comprises: and the first end of the sixth capacitor module is respectively electrically connected with the emitter of the first triode, the first end of the second resistor module and the direct-current power supply, and the second end of the sixth capacitor module is grounded.

9. The anti-surge protection circuit according to claim 3, wherein the first resistor module comprises a first resistor, a second resistor and a third resistor connected in series, the first resistor is further electrically connected to the cathode of the first diode, and the third resistor is further electrically connected to the first input terminal of the optocoupler and the cathode of the second diode, respectively.

10. An electrical system comprising the anti-surge protection circuit of any of claims 1 to 9.

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