Patch board protection circuit and patch board

Abstract

According to the patch board protection circuit and the patch board, the patch board protection circuit comprises at least one socket unit, each socket unit comprises a relay module, the socket live wire end of the socket unit is electrically connected with the mains supply live wire input end, and the relay module is electrically connected with the socket live wire end of the socket unit. The relay module is arranged on an electric connecting line between the live wire end of the socket and the live wire input end of the commercial power, and the electric connecting line is also provided with a corresponding voltage detection end; the control unit comprises at least one detection pin and a control pin corresponding to the detection pin, each detection pin is electrically connected with the voltage detection end of the corresponding socket unit, and each control pin is electrically connected with the relay module of the corresponding socket unit; when any detection pin of the control unit receives a low level signal input by the voltage detection port, a high level signal is output to the related relay module through the corresponding control pin, so that the related relay module is disconnected, and the safety of power utilization is effectively improved.

Description

Technical Field

[0001] The present application relates to the field of circuit technology, and in particular to a power strip protection circuit and a power strip. Background Art

[0002] With the development of social economy and the advancement of science and technology, power strips are used more and more frequently, and more and more home appliances are electrically connected to power strips. When home appliances are used for a long time, they will inevitably fail. When the failed home appliances are always electrically connected to the home power strip, it will cause safety hazards.

[0003] In the related art, the protection measure for a power strip that is electrically connected to a faulty home appliance is usually to add a fuse in the power strip circuit. When a current short circuit occurs, the circuit is protected by disconnecting the fuse.

[0004] However, this protection method will disconnect the power supply of all sockets of the power strip due to the failure of one device during use, thereby affecting other household appliances in normal use. In addition, it has high requirements for the fuse during use and needs to be replaced frequently, thus reducing the safety of electricity use. Utility Model Content

[0005] The embodiment of the utility model provides a power strip protection circuit and a power strip, which can improve the safety of electricity use.

[0006] To achieve the above-mentioned purpose, a first aspect of an embodiment of the present application provides a power strip protection circuit, comprising:

[0007] At least one socket unit, each of which comprises a relay module, wherein the live wire end of the socket unit is electrically connected to the live wire input end of the mains power supply, the relay module is arranged on an electrical connection line between the live wire end of the socket and the live wire input end of the mains power supply, and a corresponding voltage detection end is also arranged on the electrical connection line;

[0008] A control unit, the control unit comprising at least one detection pin and a control pin corresponding to the detection pin, each of the detection pins being electrically connected to the voltage detection end under the corresponding socket unit, and each of the control pins being electrically connected to the relay module under the corresponding socket unit;

[0009] When any one of the detection pins of the control unit receives a low-level signal input from the voltage detection port, a high-level signal is output to the relevant relay module through the corresponding control pin to disconnect the relevant relay module.

[0010] In some embodiments, each of the socket units further comprises a switch module;

[0011] The switch module is arranged between the control pin and the relay module, a first end of the switch module is electrically connected to the control pin, and a second end of the switch module is electrically connected to the relay module.

[0012] In some embodiments, each of the switch modules includes a first voltage-dividing resistor, a second voltage-dividing resistor, and a control transistor;

[0013] The first end of the first voltage-dividing resistor is connected to the corresponding control pin, and the second end of the first voltage-dividing resistor is connected to the first end of the control transistor;

[0014] Two ends of the second voltage-dividing resistor are respectively connected to the first end and the second end of the control transistor;

[0015] The third end of the control transistor is connected to the first end of the relay module.

[0016] In some embodiments, each of the socket units further comprises a control diode;

[0017] The positive electrode of the control diode is connected to the third end of the control transistor, and the negative electrode of the control diode is connected to the second end of the relay module.

[0018] In some embodiments, each of the socket units further comprises a rectification detection module;

[0019] The rectification detection module is arranged between the voltage detection end and the electrical connection line, a first end of the rectification detection module is electrically connected to the voltage detection end, and a second end of the rectification detection module is electrically connected to the electrical connection line.

[0020] In some embodiments, the rectification detection module includes a rectification diode, a third voltage-dividing resistor, and a fourth voltage-dividing resistor;

[0021] The positive electrode of the rectifier diode is connected to the connecting line, the negative electrode of the rectifier diode is connected to the first end of the third voltage-dividing resistor, the second end of the third voltage-dividing resistor is connected to the first end of the fourth voltage-dividing resistor, and the second end of the fourth voltage-dividing resistor is connected to the voltage detection end.

[0022] In some embodiments, the power strip protection circuit further includes a buzzer warning module, and the control unit includes a buzzer control pin;

[0023] The buzzer warning module includes a fifth voltage-dividing resistor, a buzzer control MOS tube and a buzzer, the buzzer control pin is connected to the first end of the fifth voltage-dividing resistor, the second end of the fifth voltage-dividing resistor is connected to the first end of the buzzer control MOS tube, and the second end of the buzzer control MOS tube is connected to the buzzer.

[0024] In some embodiments, the power strip protection circuit further includes a light warning module corresponding to each of the socket units, and the control unit includes a light control pin corresponding to each of the socket units;

[0025] The light warning module includes a sixth voltage-dividing resistor and a light emitting diode. The light control pin is connected to a first end of the sixth voltage-dividing resistor, and a second end of the sixth voltage-dividing resistor is connected to the light emitting diode.

[0026] In some embodiments, the power strip protection circuit further includes a power module, and the power module is electrically connected to the control unit and each of the relay modules.

[0027] To achieve the above-mentioned purpose, a second aspect of an embodiment of the present application proposes a power strip, including the power strip protection circuit described in the first aspect.

[0028] The embodiments of the present invention at least include the following beneficial effects:

[0029] The embodiment of the present application proposes a power strip protection circuit and a power strip, wherein the power strip protection circuit includes at least one socket unit, each socket unit includes a relay module, wherein the socket live wire end of the socket unit is electrically connected to the mains live wire input end, and the relay module is arranged on an electrical connection line between the socket live wire end and the mains live wire input end, and a corresponding voltage detection end is also arranged on the electrical connection line; a control unit, the control unit includes at least one detection pin, and a control pin corresponding to the detection pin, each detection pin is electrically connected to the voltage detection end under the corresponding socket unit, and each control pin is electrically connected to the relay module under the corresponding socket unit; when any one detection pin of the control unit receives a low-level signal input by the voltage detection port, a high-level signal is output to the relevant relay module through the corresponding control pin to disconnect the relevant relay module. Based on this, in an embodiment of the present application, when a faulty household appliance is inserted into any socket unit, the detection pin corresponding to the socket unit in the control unit receives a low-level signal through the voltage detection end of the corresponding socket unit, and the control unit outputs a high level to the relay module of the socket unit through the control pin corresponding to the socket unit, so that the relay module independently disconnects the electrical connection between the live wire end of the socket of the socket unit and the live wire input end of the AC power, thereby effectively protecting the power strip circuit while avoiding affecting other household appliances in normal use; in addition, when the faulty household appliance is unplugged or restored to normal, the control unit restores the electrical connection between the live wire end of the socket of the socket unit and the live wire input end of the AC power by controlling the relay module of the socket unit, thereby eliminating the need for cumbersome fuse replacement, thereby effectively improving the safety of electricity use.

[0030] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures specifically pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the power strip protection circuit provided in an embodiment of the present application.

[0032] Figure 2 This is a circuit diagram of a power strip protection circuit provided in yet another embodiment of the present application.

[0033] Figure 3 This is a schematic diagram of a power strip provided in yet another embodiment of the present application. DETAILED DESCRIPTION

[0034] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0035] It should be understood that in the description of the embodiments of the present utility model, "a" means more than one, "a" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first", "second", etc., it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0036] In the description of the embodiments of the present invention, unless otherwise clearly defined, terms such as setting, installation, and electrical connection should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the embodiments of the present invention based on the specific content of the technical solution.

[0037] In the description of the utility model, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] With the development of social economy and the advancement of science and technology, power strips are used more and more frequently, and more and more home appliances are electrically connected to power strips. When home appliances are used for a long time, they will inevitably fail. When the failed home appliances are always electrically connected to the home power strip, it will cause safety hazards.

[0039] In the related art, the protection measure for a power strip that is electrically connected to a faulty home appliance is usually to add a fuse in the power strip circuit. When a current short circuit occurs, the circuit is protected by disconnecting the fuse.

[0040] However, this protection method will disconnect the power supply of all sockets of the power strip due to the failure of one device during use, thereby affecting other household appliances in normal use. In addition, it has high requirements for the fuse during use and needs to be replaced frequently, thus reducing the safety of electricity use.

[0041] In an embodiment of the present application, when a faulty household appliance is inserted into any socket unit, the detection pin corresponding to the socket unit in the control unit receives a low-level signal through the voltage detection end of the corresponding socket unit, and the control unit outputs a high level to the relay module of the socket unit through the control pin corresponding to the socket unit, so that the relay module independently disconnects the electrical connection between the live wire end of the socket of the socket unit and the live wire input end of the AC power supply, thereby effectively protecting the power strip circuit while avoiding affecting other household appliances in normal use; in addition, when the faulty household appliance is unplugged or restored to normal, the control unit restores the electrical connection between the live wire end of the socket of the socket unit and the live wire input end of the AC power supply by controlling the relay module of the socket unit, thereby eliminating the need for cumbersome fuse replacement, thereby effectively improving the safety of electricity use.

[0042] The embodiments of the present application provide a power strip protection circuit and a power strip, which are specifically described through the following embodiments. First, the power strip protection circuit in the embodiments of the present application is described.

[0043] In order to better describe the power strip protection circuit provided in the embodiment of the present application, in this embodiment, refer to Figure 1As shown in FIG. 1 , it is a schematic diagram of the structure of the power strip protection circuit provided in the embodiment of the present application. Figure 1 As shown, the power strip protection circuit 100 includes a plurality of socket units electrically connected to the power module, a control unit, a total light warning module and a buzzer warning module. Each socket unit is electrically connected to the control unit, and the light warning module and the buzzer warning module are electrically connected to the control unit. In addition, each socket unit is equipped with a relay module; when the power strip protection circuit is running, the control unit monitors the current and voltage of each socket unit in real time. When the control unit detects that a current and voltage abnormality occurs in a socket unit, in order to protect the normal operation of other socket units on the power strip, the control unit will disconnect the operating current of the socket unit through the relay module of the socket unit with the abnormal current and voltage, thereby ensuring that the abnormal socket unit will not affect the operation and use of other normal socket units, thereby protecting the power strip protection circuit.

[0044] In addition, after the control relay module disconnects the abnormal socket unit, the control unit also sends out an abnormal indication through the main light warning module and the buzzer warning module, thereby facilitating timely maintenance of the abnormal socket unit.

[0045] based on Figure 1 The structural schematic diagram of the power strip protection circuit is shown, and the power strip protection circuit provided in the embodiment of the present application will be further described below.

[0046] Reference Figure 2 , is a circuit diagram of a power strip protection circuit provided in an embodiment of the present application. Figure 2 As shown, the power strip protection circuit includes a plurality of socket units, each of which includes a relay module, wherein the AC socket in the socket unit includes a socket live wire terminal L1 and a neutral wire terminal N, and the socket live wire terminal L1 is electrically connected to the mains live wire input terminal L, the relay module is arranged on the electrical connection line between the socket live wire terminal L1 and the mains live wire input terminal L, and a corresponding voltage detection terminal is also arranged on the electrical connection line of each socket unit.

[0047] In addition, the power strip protection circuit includes a control unit MCU (i.e., U2), and the control unit U2 includes detection pins (including PA5, PA6, PA7, and PA8) corresponding to each socket unit, and each detection pin is electrically connected to the voltage detection end under the corresponding socket unit, and the control unit U2 can monitor the current and voltage of the corresponding socket unit in real time through the detection pin. The control unit U2 also includes control pins (including PA1, PA2, PA3, and PA4) corresponding to each socket unit, and each control pin is electrically connected to the relay module under the corresponding socket unit. When any detection pin of the control unit receives a low-level signal input by the voltage detection port, a high-level signal is output to the corresponding relay module through the control pin corresponding to the socket unit corresponding to the voltage detection port, so that the relay module of the socket unit is disconnected, thereby disconnecting the operating current of the socket unit alone, ensuring that the abnormal socket unit will not affect the operation and use of other normal socket units, thereby protecting the power strip protection circuit.

[0048] In some embodiments, each socket unit further includes a switch module, which is disposed between the control pin and the relay module, wherein a first end of the switch module is connected to the control pin, and a second end of the switch module is connected to the relay module. Figure 2 As shown in , the switch module of each socket unit includes a first voltage-dividing resistor (such as R13, R15, R17 and R19), a second voltage-dividing resistor (such as R12, R14, R16 and R18) and a control transistor (such as Q2, Q3, Q4 and Q5).

[0049] Among them, Figure 2 The uppermost socket unit is taken as an example, the first end of the first voltage-dividing resistor R13 is connected to the control pin PA1 corresponding to the socket unit, the second end of the first voltage-dividing resistor R13 is connected to the first end of the control transistor Q2 of the socket unit (i.e., the base of the transistor), the two ends of the second voltage-dividing resistor R12 are respectively connected to the first end and the second end of the control transistor Q2 (i.e., the emitter of the transistor), and the third end of the control transistor Q2 (i.e., the collector of the transistor) is connected to the first end of the relay module K1, and the second end of the control transistor Q2 is also grounded.

[0050] When the control pin PA1 outputs a high-level signal, due to the voltage-dividing effect of the first voltage-dividing resistor R13 and the second voltage-dividing resistor R12, there is a voltage difference between the first end and the second end of the control transistor Q2, so that the control transistor Q2 enters the on state, so that the high-level signal can enter the relay module through the control transistor Q2, so that the relay module is disconnected, so as to disconnect the operating current of the socket unit alone.

[0051] In some embodiments, each socket unit further includes a control diode (eg Figure 2D5, D6, D7 and D8 shown in FIG.

[0052] by Figure 2 Taking the uppermost socket unit as an example, the anode of the control diode D5 is connected to the third end of the control transistor Q2, the cathode of the control diode is connected to the second end of the relay module K1, and the second end of the relay module K1 is connected to the power supply.

[0053] When the control transistor Q2 enters the on state, the high-level signal can reach the positive electrode of the control diode D5 to make the control diode conduct, and the control coil of the relay module K1 is energized, so that the control switch of the relay module K1 is transferred from the normally closed position (i.e., the position that electrically connects the live wire terminal L1 of the socket and the live wire input terminal L of the AC power) to the normally open position (i.e., the position that disconnects the live wire terminal L1 of the socket and the live wire input terminal L of the AC power), thereby disconnecting the operating current of the socket unit alone.

[0054] In some embodiments, each socket unit also includes a rectification detection module, which is arranged between the voltage detection end and the electrical connection line, the first end of the rectification detection module is electrically connected to the voltage detection end, and the second end of the rectification detection module is electrically connected to the electrical connection line.

[0055] like Figure 2 As shown, the rectification detection module includes rectification diodes (D9, D10, D11 and D12), a third voltage-dividing resistor (R20, R22, R24 and R26) and a fourth voltage-dividing resistor (R21, R23, R25 and R27).

[0056] by Figure 2 The uppermost socket unit is taken as an example, the positive electrode of the rectifier diode D9 is connected to the connection line between the socket live wire terminal L1 of the socket unit and the mains live wire input terminal L, and the negative electrode of the rectifier diode D9 is connected to the first end of the third voltage-dividing resistor R20, wherein the rectifier diode D9 is used to rectify and stabilize the current and voltage between the socket live wire terminal L1 of the socket unit and the mains live wire input terminal L; the second end of the third voltage-dividing resistor R20 is connected to the first end of the fourth voltage-dividing resistor R21, and the second end of the fourth voltage-dividing resistor R21 is connected to the voltage detection end (i.e., the line end connected to PA5). The rectification detection module is used to receive and rectify and stabilize the current and voltage between the socket live wire terminal L1 of the socket unit and the mains live wire input terminal L, and transmit the current and voltage to the detection pin PA1 of the control unit U2, so that the control unit U2 can monitor the power consumption of the socket unit in real time and stably, and determine whether an abnormality occurs.

[0057] In some embodiments, Figure 2As shown, the power strip protection circuit also includes a buzzer alarm module, the control unit U2 includes a buzzer control pin pb9, the buzzer alarm module includes a fifth voltage-dividing resistor R8, a buzzer control MOS tube Q1 and a buzzer SP1, the buzzer control pin pb9 is connected to the first end of the fifth voltage-dividing resistor R8, the second end of the fifth voltage-dividing resistor R8 is connected to the first end of the buzzer control MOS tube Q1 (that is, the gate of the MOS tube), the second end of the buzzer control MOS tube Q1 (that is, the drain of the MOS tube) is connected to the buzzer SP1, the buzzer SP1 is also connected to a power supply, and the third end of the buzzer control MOS tube Q1 (that is, the source of the MOS tube) is grounded.

[0058] When the control unit U2 detects abnormal power consumption in a socket unit, the control unit U2 outputs a high-level signal through the buzzer control pin pb9, so that the trouble control MOS tube Q1 enters the on state, so that the buzzer can be powered on and send out a buzzer warning signal, so as to promptly notify the maintenance personnel to inspect the socket board and its electrical connection equipment, thereby improving the safety of power consumption.

[0059] In some embodiments, Figure 2 As shown, the power strip protection circuit also includes a total light warning module, which includes a light warning module corresponding to each socket unit, and the control unit U2 includes a light control pin (pa7, pa0, pa1 and pa8) corresponding to each socket unit. Each light warning module includes a sixth voltage-dividing resistor (R7, R9, R10 and R11) and a light-emitting diode (LED1, LED2, LED3 and LED4).

[0060] by Figure 2 The leftmost light warning module (i.e., the light warning module corresponding to the light control pin pa7) is taken as an example. The light control pin pa7 is connected to the first end of the sixth voltage-dividing resistor R7, and the second end of the sixth voltage-dividing resistor R7 is connected to the light-emitting diode LED1.

[0061] When the control unit U2 detects abnormal power consumption in a socket unit, the control unit U2 controls the corresponding light-emitting diode by controlling the light control pin corresponding to the socket unit to emit a light warning signal corresponding to the socket unit, so as to promptly notify maintenance personnel to inspect the socket unit and its electrically connected equipment, thereby accurately improving the safety of power consumption.

[0062] In some embodiments, Figure 2As shown, the control unit U2 also includes a first power pin hpvd, a first ground pin vddio, a seventh voltage-dividing resistor R5, a first capacitor C1 and a second capacitor C2, wherein the first power pin hpvd is connected to the first end of the seventh voltage-dividing resistor R5, the second end of the seventh voltage-dividing resistor R5 is connected to the power supply, the first ground pin vddio is connected to the first end of the second capacitor C2, the second end of the second capacitor C2 is grounded, the first end of the first capacitor C1 is connected to the first power pin hpvd, and the second end of the first capacitor C1 is grounded to ensure stable power-on of the control unit U2.

[0063] In some embodiments, the power strip protection circuit also includes a power supply module, which is electrically connected to the control unit and the relay module of each socket unit to ensure stable power supply of the entire power strip protection circuit.

[0064] like Figure 2 As shown in the lower left corner of the figure, the power module includes a power chip U1, a fuse F1, a varistor MOV1, a first insurance diode D1, a second insurance diode D2, a first polarity capacitor EC1, an eighth voltage-dividing resistor R1, a ninth voltage-dividing resistor R2, a second polarity capacitor EC2, a first power diode D3, a second power diode D4, a third polarity capacitor EC3 and a tenth voltage-dividing resistor R3. Among them, the power chip U1 includes a first wiring pin VST, a second wiring pin HV, a second power pin VCC and a second ground pin N.

[0065] The first wiring pin VST is connected to the cathode of the second insurance diode D2, the anode of the second insurance diode D2 is connected to the cathode of the first insurance diode D1, the anode of the first insurance diode D1 is connected to the first end of the insurance tube F1, and the second end of the insurance tube F1 is connected to the mains live wire input terminal L. The second wiring pin HV is connected to the first end of the ninth voltage-dividing resistor R2, the second end of the ninth voltage-dividing resistor R2 is connected to the first end of the eighth voltage-dividing resistor R1, and the second end of the eighth voltage-dividing resistor R1 is connected to the cathode of the second insurance diode D2. The anode of the first polarity capacitor EC1 is connected to the cathode of the second insurance diode D2, and the cathode of the second polarity capacitor EC1 is grounded. The first end of the varistor MOV1 is connected to the first end of the insurance tube F1, the second end of the varistor MOV1 is connected to the neutral line terminal N, and the second end of the varistor MOV1 is grounded. The second power pin VCC is connected to the cathode of the first power diode D3, and the anode of the first power diode D3 is connected to the power supply; the second ground pin N is connected to the cathode of the second power diode D4, and the anode of the second power diode D4 is grounded; the anode of the second polarity capacitor EC2 is connected to the second power pin VCC, and the cathode of the second power pin VCC is connected to the second ground pin N; the anode of the third polarity capacitor EC3 is connected to the anode of the first power diode D3, and the cathode of the third polarity capacitor EC3 is connected to the cathode of the first power diode D3; the first end of the tenth-degree resistor R3 is connected to the anode of the first power diode D3, and the second end of the tenth-degree resistor R3 is connected to the cathode of the first power diode D3.

[0066] In some embodiments, when a short circuit occurs in the household appliance electrically connected to the AC socket 1, the detection pin PA5 of the control unit U2 detects that the voltage on the electrical connection line corresponding to the AC socket 1 is abnormal (such as the detected voltage is lower than the preset threshold, or higher than the preset threshold). At this time, the control pin PA1 of the control unit U2 immediately sends a high-level signal (such as a voltage of 3.3V) to turn on the control transistor Q2, and the relay module K1 supplies power to disconnect the electrical connection line corresponding to the AC socket 1, resulting in the AC socket 1 being disconnected from power. At this time, the control unit U2 controls the light emitting diode LED1 to send out a light warning message through the light control pin pa7, and the control unit U2 controls the buzzer to turn on through the buzzer control pin pb9, thereby sending out a buzzer signal message to remind the household appliance used for the AC socket 1 that an abnormality occurs. After the abnormality is resolved, the control pin PA1 of the control unit U2 sends a low-potential signal (note: the voltage is 0V) to turn off the control transistor Q2, and the relay module K1 disconnects the power supply, so that the electrical connection line corresponding to the AC socket 1 is normally electrically connected, and the AC socket 1 normally supplies power to the electrically connected household appliance.

[0067] The power strip protection circuit provided in the embodiment of the present application effectively protects the power strip circuit while avoiding affecting other household appliances in normal use; in addition, when the faulty household appliance is unplugged or restored to normal, the control unit restores the electrical connection between the live wire end of the socket unit and the live wire input end of the AC power by controlling the relay module of the socket unit, thereby eliminating the need for cumbersome fuse replacement, thereby effectively improving the safety of electricity use.

[0068] In addition, the present application embodiment also provides a power strip. Figure 3 , is a schematic diagram of a power strip provided in an embodiment of the present application. Figure 3 As shown, the power strip includes multiple AC sockets and the above-mentioned power strip protection circuit, and each AC socket is connected to the power strip protection circuit. Its specific technical principles and beneficial effects and the type described in the above-mentioned power strip protection circuit are not repeated here.

[0069] The embodiments described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0070] It should also be understood that the various implementations provided in the embodiments of the present utility model can be combined arbitrarily to achieve different technical effects.

[0071] The above is a specific description of the preferred implementation of the utility model, but the utility model is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions under the shared conditions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of the utility model.

Claims

1. A power strip protection circuit, characterized in that: include: At least one socket unit, each of which comprises a relay module, wherein the live wire end of the socket unit is electrically connected to the live wire input end of the mains power supply, the relay module is arranged on an electrical connection line between the live wire end of the socket and the live wire input end of the mains power supply, and a corresponding voltage detection end is also arranged on the electrical connection line; A control unit, the control unit comprising at least one detection pin and a control pin corresponding to the detection pin, each of the detection pins being electrically connected to the voltage detection end under the corresponding socket unit, and each of the control pins being electrically connected to the relay module under the corresponding socket unit; When any one of the detection pins of the control unit receives a low-level signal input from the voltage detection port, a high-level signal is output to the relevant relay module through the corresponding control pin to disconnect the relevant relay module.

2. The power strip protection circuit according to claim 1, characterized in that: Each of the socket units also includes a switch module; The switch module is arranged between the control pin and the relay module, a first end of the switch module is electrically connected to the control pin, and a second end of the switch module is electrically connected to the relay module.

3. The power strip protection circuit according to claim 2, characterized in that: Each of the switch modules includes a first voltage-dividing resistor, a second voltage-dividing resistor and a control transistor; The first end of the first voltage-dividing resistor is connected to the corresponding control pin, and the second end of the first voltage-dividing resistor is connected to the first end of the control transistor; Two ends of the second voltage-dividing resistor are respectively connected to the first end and the second end of the control transistor; The third end of the control transistor is connected to the first end of the relay module.

4. The power strip protection circuit according to claim 3, characterized in that: Each of said socket units further comprises a control diode; The anode of the control diode is connected to the third end of the control transistor, and the cathode of the control diode is connected to the second end of the relay module.

5. The power strip protection circuit according to claim 1, characterized in that: Each of the socket units also includes a rectification detection module; The rectification detection module is arranged between the voltage detection end and the electrical connection line, a first end of the rectification detection module is electrically connected to the voltage detection end, and a second end of the rectification detection module is electrically connected to the electrical connection line.

6. The power strip protection circuit according to claim 5, characterized in that: The rectification detection module includes a rectification diode, a third voltage-dividing resistor and a fourth voltage-dividing resistor; The positive electrode of the rectifier diode is connected to the connecting line, the negative electrode of the rectifier diode is connected to the first end of the third voltage-dividing resistor, the second end of the third voltage-dividing resistor is connected to the first end of the fourth voltage-dividing resistor, and the second end of the fourth voltage-dividing resistor is connected to the voltage detection end.

7. The power strip protection circuit according to claim 1, characterized in that: The plug board protection circuit also includes a buzzer warning module, and the control unit includes a buzzer control pin; The buzzer warning module includes a fifth voltage-dividing resistor, a buzzer control MOS tube and a buzzer, the buzzer control pin is connected to the first end of the fifth voltage-dividing resistor, the second end of the fifth voltage-dividing resistor is connected to the first end of the buzzer control MOS tube, and the second end of the buzzer control MOS tube is connected to the buzzer.

8. The power strip protection circuit according to claim 1, characterized in that: The socket protection circuit further comprises a light warning module corresponding to each socket unit, and the control unit comprises a light control pin corresponding to each socket unit; The light warning module includes a sixth voltage-dividing resistor and a light emitting diode. The light control pin is connected to a first end of the sixth voltage-dividing resistor, and a second end of the sixth voltage-dividing resistor is connected to the light emitting diode.

9. The power strip protection circuit according to claim 1, characterized in that: The power strip protection circuit also includes a power supply module, and the power supply module is electrically connected to the control unit and each of the relay modules.

10. A power strip, characterized in that: A power strip protection circuit comprising any one of claims 1 to 9.

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