CN218183000U

CN218183000U - Surge protection circuit

Info

Publication number: CN218183000U
Application number: CN202221523694.3U
Authority: CN
Inventors: 邱志杰
Original assignee: Xiamen Hedman Electronic Technology Co ltd
Current assignee: Xiamen Hedman Electronic Technology Co ltd
Priority date: 2022-06-18
Filing date: 2022-06-18
Publication date: 2022-12-30
Anticipated expiration: 2032-06-18

Abstract

The utility model relates to a surge protection field particularly, relates to a surge protection circuit, including voltage reduction module, mains voltage collection module, relay module and control module, mains voltage collection module's output and control module's input electric connection, control module's output and relay module's input electric connection, voltage reduction module is mains voltage collection module, relay module and control module power supply, and relay RY 1's among the electrical apparatus module pin 3 and pin 4 are connected on the live wire and regard as output and outside with electrical apparatus electric connection, and relay RY1 disconnection when mains voltage is unusual can accomplish to protect two outside electrical apparatus of using simultaneously, has higher efficiency. Meanwhile, the power supply voltage acquisition module acquires power supply voltage in real time, so that the relay RY1 can be ensured to be closed only when the power supply voltage is stable and normal, and the power utilization environment of the power utilization device is effectively ensured.

Description

Surge protection circuit

Technical Field

The utility model relates to a surge protection field particularly, relates to a surge protection circuit.

Background

The circuit often can produce very high operation overvoltage when being struck by lightning, easily leads to electrical apparatus to be in good order bad, and the current product on the market at present mostly only has a power consumption protection socket, causes inconvenience in the use, and circuit turn-off time is too short when the voltage fluctuates, easily causes the damage to electrical apparatus spare, is unfavorable for the protection to electrical apparatus spare.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of prior art, the utility model provides a surge protection circuit can solve and can't protect a plurality of consumer, and circuit off-time is unfavorable for technical problem such as protection to the consumer simultaneously for the short.

In order to solve the technical problem, the utility model provides a following technical scheme:

the utility model provides a surge protection circuit, its characterized in that, includes step-down module, mains voltage collection module, relay module and control module, mains voltage collection module's output and control module's input electric connection, control module's output and relay module's input electric connection, step-down module is mains voltage collection module, relay module and control module power supply.

Further, the control module comprises an MCU chip U1 and a capacitor C3, the pin 1 of the MCU chip U1 is electrically connected with the output end of the voltage reduction module, the pin 8 of the MCU chip U1 is grounded, the capacitor C3 is connected between the pin 1 and the pin 8 of the MCU chip U1, the pin 5 of the MCU chip U1 is electrically connected with the input end of the relay module, and the pin 6 of the MCU chip U1 is electrically connected with the output end of the power supply voltage acquisition module.

Further, the power supply voltage acquisition module comprises a diode D3, a diode D4, a resistor R7, a resistor R8 and a capacitor C2; diode D3's positive pole and live wire electric connection, diode D3's negative pole and resistance R7's one end electric connection, resistance R7's the other end and resistance R8, electric capacity C2's one end, diode D4's positive pole and control module's input electric connection, resistance R8 and electric capacity C2's the other end all with ground wire electric connection, diode D4's negative pole and the output electric connection of step-down module.

Further, the relay module comprises a resistor R4, a diode D2, a triode Q1 and a relay RY1; the output end of the control module is electrically connected with one end of a resistor R4, the other end of the resistor R4 is electrically connected with a base electrode of a triode Q1, an emitting electrode of the triode Q1 is grounded, a collecting electrode of the triode Q1 is electrically connected with a positive electrode of a diode D2 and a pin 2 of a relay RY1, a negative electrode of the diode D2 and the pin 1 of the relay RY1 are both electrically connected with the output end of the voltage reduction module, and a pin 3 and a pin 4 of the relay RY1 are connected on a live wire and serve as the output end to be electrically connected with an external electrical appliance.

Further, the voltage reduction module comprises a first voltage reduction module and a second voltage reduction module, the input end of the first voltage reduction module is electrically connected with the live wire and the zero wire, the power output end of the first voltage reduction module is electrically connected with the power input ends of the relay module and the second voltage reduction module, and the power output end of the second voltage reduction module is electrically connected with the power input ends of the power voltage acquisition module and the control module.

Further, the first voltage reduction module comprises a resistor R1, a resistor R3, a resistor R13, a resistor R14, a resistor FR1, a voltage dependent resistor RV1, a capacitor C1, an electrolytic capacitor E1, a schottky diode D1 and a bridge rectifier BB1; the utility model discloses a voltage reduction device, including resistance FR1, resistance R14, piezoresistor RV1, resistance R14, resistor R13, pin 2 electric connection of resistance R1, piezoresistor RV1, pin 4 and zero line electric connection of piezoresistor RV1, pin 3 and the anodal one end electric connection of electrolytic capacitor E1 and resistance R3 of bridge rectifier BB1, pin 3 of bridge rectifier BB1 is as power output end and relay module and second step-down module's power input end electric connection, the other end of resistance R3 and Schottky diode D1's negative pole electric connection, pin 1 of rectifier BB1, the anodal of Schottky diode D1 and the negative pole of electrolytic capacitor E1 all ground connection.

Further, the second voltage reduction module comprises a resistor R2, a resistor R5, a resistor R6, an electrolytic capacitor E2 and a voltage stabilizing diode U2; the power output end of the first voltage reduction module is electrically connected with one end of a resistor R2, the other end of the resistor R2 is electrically connected with one end of a resistor R6, the anode of an electrolytic capacitor E2 and a pin 1 of a voltage stabilizing diode U2, the other end of the resistor R2 is also electrically connected with the power output end of a power supply voltage acquisition module and the power input end of a control module as the power output end, the other end of the resistor R6 is electrically connected with one end of a resistor R5 and the pin 2 of the voltage stabilizing diode U2, and the other end of the resistor R5, the pin 3 of the voltage stabilizing diode U2 and the cathode of the electrolytic capacitor E2 are all grounded.

Furthermore, the display module is further included, the output end of the control module is electrically connected with the input end of the display module, and the voltage reduction module supplies power to the display module.

Further, the display module comprises a light emitting diode LED1, a light emitting diode LED2, a light emitting diode LED3, a light emitting diode LED4 and a resistor R9-a resistor R12, the output end of the voltage reduction module is electrically connected with the positive electrodes of the light emitting diode LED1, the light emitting diode LED2, the light emitting diode LED3 and the light emitting diode LED4, the negative electrode of the light emitting diode LED1 and the resistor R10 are connected in series on the pin 3 of the MCU chip U1, the negative electrode of the light emitting diode LED2 and the resistor R12 are connected in series on the pin 7 of the MCU chip U1, the negative electrode of the light emitting diode LED3 and the resistor R9 are connected in series on the pin 2 of the MCU chip U1, and the negative electrode of the light emitting diode LED4 and the resistor R11 are connected in series on the pin 4 of the MCU chip U1.

The invention has the beneficial effects that:

in this scheme, relay RY 1's in the relay module pin 3 and pin 4 are connected on the live wire and as output and external electrical apparatus electric connection that uses, and relay RY1 disconnection when mains voltage is unusual can accomplish to protect two external electrical apparatus simultaneously, has higher efficiency. Meanwhile, the power supply voltage acquisition module acquires power supply voltage in real time, so that the relay RY1 can be ensured to be closed only when the power supply voltage is stable and normal, and the power utilization environment of the power utilization device is effectively ensured. And the working state of the circuit is displayed, wherein the circuit can be cleaned.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a block diagram of a surge protection circuit module (voltage reduction module is not shown);

fig. 2 is a circuit diagram of a first voltage reduction module of the surge protection circuit of the present invention;

fig. 3 is a circuit diagram of a second voltage reduction module of the surge protection circuit of the present invention;

fig. 4 is a circuit diagram of a power supply voltage acquisition module of the surge protection circuit of the present invention;

fig. 5 is a circuit diagram of a control module of the surge protection circuit of the present invention;

fig. 6 is a circuit diagram of a relay module of the surge protection circuit of the present invention;

fig. 7 is a circuit diagram of a display module of the surge protection circuit.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive efforts based on the embodiments of the present invention, are within the scope of protection of the present invention.

Referring to fig. 1-7, the utility model provides a surge protection circuit, which is characterized in that the surge protection circuit comprises a voltage reduction module, a power voltage acquisition module, a relay module, a display module and a control module. The output end of the power supply voltage acquisition module is electrically connected with the input end of the control module, and the output end of the control module is electrically connected with the input ends of the relay module and the display module. The voltage reduction module supplies power to the power supply voltage acquisition module, the relay module, the display module and the control module.

Referring to fig. 5, the control module includes an MCU chip U1 and a capacitor C3, a pin 1 of the MCU chip U1 is electrically connected to an output terminal of the voltage-reducing module, a pin 8 of the MCU chip U1 is grounded, and the capacitor C3 is connected between the pin 1 and the pin 8 of the MCU chip U1. Pin 2, pin 3, pin 4 and pin 7 of MCU chip U1 and display module's input electric connection, pin 5 and relay module's input electric connection of MCU chip U1, pin 6 and mains voltage acquisition module's output electric connection of MCU chip U1. The control module collects and compares voltage information transmitted by the power supply voltage acquisition module, judges whether the voltage information is normal working voltage, and outputs a display signal and a control signal to the display module and the relay module, wherein in the embodiment, the model of the MCU chip U1 is HT66F002.

Referring to fig. 4, the power voltage collecting module includes a diode D3, a diode D4, a resistor R7, a resistor R8, and a capacitor C2; diode D3's positive pole and live wire electric connection, diode D3's negative pole and resistance R7's one end electric connection, resistance R7's the other end and resistance R8, electric capacity C2's one end, diode D4's positive pole and control module's input electric connection, resistance R8 and electric capacity C2's the other end all with ground wire electric connection, diode D4's negative pole and the output electric connection of step-down module. The power supply voltage acquisition module acquires power supply voltage and feeds the power supply voltage back to the control module, so that the electric device is ensured to work under stable voltage.

Referring to fig. 6, the relay module includes a resistor R4, a diode D2, a transistor Q1, and a relay RY1; control module's output and resistance R4's one end electric connection, resistance R4's the other end and triode Q1's base electric connection, triode Q1's projecting pole ground connection, triode Q1's collecting electrode and diode D2's anodal and relay RY 1's pin 2 electric connection, diode D2's negative pole and relay RY 1's pin 1 all with the output electric connection of step-down module, relay RY 1's pin 3 and pin 4 are connected on the live wire and as output and external electrical apparatus electric connection. The control module controls the opening and closing of the relay module according to the power supply voltage information, the relay is closed to supply power to the external electric appliance at normal power supply voltage, and the relay is opened and stopped to supply power to the external electric appliance when the power supply voltage is abnormal, so that the damage of the external electric appliance is avoided.

Referring to fig. 2-3, the pressing module includes a first voltage-reducing module and a second voltage-reducing module, an input end of the first voltage-reducing module is electrically connected to the live line and the zero line, a power output end of the first voltage-reducing module is electrically connected to power input ends of the relay module and the second voltage-reducing module, and a power output end of the second voltage-reducing module is electrically connected to power input ends of the power voltage acquisition module and the control module.

Referring to fig. 2, the first voltage-reducing module includes a resistor R1, a resistor R3, a resistor R13, a resistor R14, a resistor FR1, a voltage-dependent resistor RV1, a capacitor C1, an electrolytic capacitor E1, a schottky diode D1, and a bridge rectifier BB1; one end of the resistor FR1 is electrically connected with a live wire, the other end of the resistor FR1 is electrically connected with the capacitor C1, one end of the resistor R14 is electrically connected with one end of the piezoresistor R1, the other end of the resistor R14 is electrically connected with one end of the resistor R13, the other end of the resistor R13 is electrically connected with the other end of the capacitor C1 and one end of the resistor R1, the other end of the resistor R1 is electrically connected with the pin 2 of the bridge rectifier BB1, the other end of the piezoresistor RV1 is electrically connected with the pin 4 and the zero line of the bridge rectifier BB1, the pin 3 of the bridge rectifier BB1 is electrically connected with the anode of the electrolytic capacitor E1 and one end of the resistor R3, the pin 3 of the bridge rectifier BB1 is used as a power output end and is electrically connected with the power input ends of the relay module and the second voltage reduction module, the other end of the resistor R3 is electrically connected with the cathode of the Schottky diode D1, and the pin 1 of the bridge rectifier BB1, the anode of the Schottky diode D1 and the cathode of the electrolytic capacitor E1 are all grounded. The first voltage reduction module converts 110-220VAC of commercial power into 24VDC, and outputs the converted voltage to the second voltage reduction module and the relay module.

Referring to fig. 3, the second voltage-reducing module includes a resistor R2, a resistor R5, a resistor R6, an electrolytic capacitor E2, and a zener diode U2; the power output end of first step-down module and the one end electric connection of resistance R2, the other end and the one end of resistance R6 of resistance R2, electrolytic capacitor E2's anodal and zener diode U2's pin 1 electric connection, power output end and mains voltage collection module and control module's power input end electric connection are still regarded as to resistance R2's the other end, resistance R6's the other end and resistance R5's one end and zener diode U2's pin 2 electric connection, resistance R5's the other end, zener diode U2's pin 3 and electrolytic capacitor E2's negative pole all ground connection. The second voltage reduction module converts the 24VDC output by the first voltage reduction module into 5VDC and outputs the 5VDC to the power supply voltage acquisition module, the display module and the control module.

Referring to fig. 7, the display module includes a light emitting diode LED1, a light emitting diode LED2, a light emitting diode LED3, a light emitting diode LED4, and a resistor R9-a resistor R12, an output end of the voltage step-down module is electrically connected to the light emitting diode LED1, the light emitting diode LED2, the light emitting diode LED3, and an anode of the light emitting diode LED4, a cathode of the light emitting diode LED1 and a resistor R10 are connected in series to a pin 3 of the MCU chip U1, a cathode of the light emitting diode LED2 and a resistor R12 are connected in series to a pin 7 of the MCU chip U1, a cathode of the light emitting diode LED3 and a resistor R9 are connected in series to a pin 2 of the MCU chip U1, and a cathode of the light emitting diode LED4 and a resistor R11 are connected in series to a pin 4 of the MCU chip U1. The display module displays the working state through the display signal output by the control module.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The foregoing shows and describes the basic principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a surge protection circuit, its characterized in that, includes step-down module, mains voltage collection module, relay module and control module, mains voltage collection module's output and control module's input electric connection, control module's output and relay module's input electric connection, step-down module is mains voltage collection module, relay module and control module power supply.

2. The surge protection circuit of claim 1, wherein: the control module comprises an MCU chip U1 and a capacitor C3, wherein the pin 1 of the MCU chip U1 is electrically connected with the output end of the voltage reduction module, the pin 8 of the MCU chip U1 is grounded, the capacitor C3 is connected between the pin 1 and the pin 8 of the MCU chip U1, the pin 5 of the MCU chip U1 is electrically connected with the input end of the relay module, and the pin 6 of the MCU chip U1 is electrically connected with the output end of the power supply voltage acquisition module.

3. The surge protection circuit of claim 1, wherein: the power supply voltage acquisition module comprises a diode D3, a diode D4, a resistor R7, a resistor R8 and a capacitor C2; diode D3's positive pole and live wire electric connection, diode D3's negative pole and resistance R7's one end electric connection, resistance R7's the other end and resistance R8, electric capacity C2's one end, diode D4's positive pole and control module's input electric connection, resistance R8 and electric capacity C2's the other end all with ground wire electric connection, diode D4's negative pole and the output electric connection of step-down module.

4. The surge protection circuit of claim 1, wherein: the relay module comprises a resistor R4, a diode D2, a triode Q1 and a relay RY1; the output end of the control module is electrically connected with one end of a resistor R4, the other end of the resistor R4 is electrically connected with a base electrode of a triode Q1, an emitting electrode of the triode Q1 is grounded, a collecting electrode of the triode Q1 is electrically connected with a positive electrode of a diode D2 and a pin 2 of a relay RY1, a negative electrode of the diode D2 and the pin 1 of the relay RY1 are both electrically connected with the output end of the voltage reduction module, and a pin 3 and a pin 4 of the relay RY1 are connected on a live wire and serve as the output end to be electrically connected with an external electrical appliance.

5. The surge protection circuit of claim 1, wherein: the voltage reduction module comprises a first voltage reduction module and a second voltage reduction module, the input end of the first voltage reduction module is electrically connected with a live wire and a zero line, the power output end of the first voltage reduction module is electrically connected with the power input ends of the relay module and the second voltage reduction module, and the power output end of the second voltage reduction module is electrically connected with the power input ends of the power voltage acquisition module and the control module.

6. The surge protection circuit of claim 5, wherein: the first voltage reduction module comprises a resistor R1, a resistor R3, a resistor R13, a resistor R14, a resistor FR1, a piezoresistor RV1, a capacitor C1, an electrolytic capacitor E1, a Schottky diode D1 and a bridge rectifier BB1; the utility model discloses a voltage reduction device, including resistance FR1, resistance R14, piezoresistor RV1, resistance R14, resistor R13, pin 2 electric connection of resistance R1, piezoresistor RV1, pin 4 and zero line electric connection of piezoresistor RV1, pin 3 and the anodal one end electric connection of electrolytic capacitor E1 and resistance R3 of bridge rectifier BB1, pin 3 of bridge rectifier BB1 is as power output end and relay module and second step-down module's power input end electric connection, the other end of resistance R3 and Schottky diode D1's negative pole electric connection, pin 1 of rectifier BB1, the anodal of Schottky diode D1 and the negative pole of electrolytic capacitor E1 all ground connection.

7. The surge protection circuit of claim 5, wherein: the second voltage reduction module comprises a resistor R2, a resistor R5, a resistor R6, an electrolytic capacitor E2 and a voltage stabilizing diode U2; the power output end of the first voltage reduction module is electrically connected with one end of a resistor R2, the other end of the resistor R2 is electrically connected with one end of a resistor R6, the anode of an electrolytic capacitor E2 and a pin 1 of a voltage stabilizing diode U2, the other end of the resistor R2 is also electrically connected with the power output end of a power supply voltage acquisition module and the power input end of a control module as the power output end, the other end of the resistor R6 is electrically connected with one end of a resistor R5 and the pin 2 of the voltage stabilizing diode U2, and the other end of the resistor R5, the pin 3 of the voltage stabilizing diode U2 and the cathode of the electrolytic capacitor E2 are all grounded.

8. The surge protection circuit of claim 2, wherein: the display module is further arranged, the output end of the control module is electrically connected with the input end of the display module, and the voltage reduction module supplies power to the display module.

9. The surge protection circuit of claim 8, wherein: the display module comprises a light emitting diode LED1, a light emitting diode LED2, a light emitting diode LED3, a light emitting diode LED4 and a resistor R9-a resistor R12, wherein the output end of the voltage reduction module is electrically connected with the positive electrodes of the light emitting diode LED1, the light emitting diode LED2, the light emitting diode LED3 and the light emitting diode LED4, the negative electrode of the light emitting diode LED1 and the resistor R10 are connected in series on the pin 3 of the MCU chip U1, the negative electrode of the light emitting diode LED2 and the resistor R12 are connected in series on the pin 7 of the MCU chip U1, the negative electrode of the light emitting diode LED3 and the resistor R9 are connected in series on the pin 2 of the MCU chip U1, and the negative electrode of the light emitting diode LED4 and the resistor R11 are connected in series on the pin 4 of the MCU chip U1.