A plug-and-play power protection device and socket electrical appliance

Abstract

The embodiment of the present invention discloses a plug-and-play power protection device and a socket appliance. The plug-and-play power protection device includes a power strip housing and a first power cord. A circuit board and a plurality of parallel output sockets are arranged in the power strip housing. The circuit board is provided with a power protection circuit. The front of the power strip housing is provided with a plurality of sockets matched with the output sockets. The power protection circuit is connected to the output socket. One end of the first power cord is provided with a power input plug. The other end of the first power cord extends into one side of the power strip housing and is connected to the power protection circuit. The power protection circuit collects and absorbs discrete currents and electrons on the local ground wire and transmits them to the output socket, detects the grounding state and calculates the current input voltage and frequency. The power input plug can be plugged into other sockets, and the output socket is connected to the load. It is plug-and-play and can be used directly without professional installation, which solves the problem of inconvenient installation of the existing anti-leakage device when water enters.

Description

Technical Field

[0001] The invention relates to the field of electronic technology, and in particular to a plug-and-play power protection device and a socket electrical appliance. Background Art

[0002] The existing anti-leakage device during water inflow is often installed in the transformer box or the main switch box. Although it provides protection for electricity safety, it requires professional installation. For example, there are at least 4 wires to be connected in the anti-leakage device, including the live wire of the power supply, the neutral wire of the power supply, the ground wire of the mains and the local ground wire. Since it involves the live wire and the neutral wire of the high-voltage power supply, it must be installed by professional electricians. Not only is it inconvenient to use, but it also requires additional installation fees to obtain electricity safety protection. Summary of the invention

[0003] In view of the above technical problems, the embodiments of the present invention provide a plug-and-play power protection device and a socket appliance to solve the problem that the existing devices for preventing leakage during water ingress are inconvenient to install.

[0004] An embodiment of the present invention provides a plug-and-play power protection device, which includes a power strip housing and a first power cord. A circuit board and a plurality of parallel output sockets are arranged in the power strip housing, a power protection circuit is arranged on the circuit board, and a plurality of sockets paired with the output sockets are arranged on the front of the power strip housing; the power protection circuit is connected to the output sockets, one end of the first power cord is provided with a power input plug, and the other end of the first power cord extends into one side of the power strip housing and is connected to the power protection circuit; the power protection circuit collects and absorbs discrete currents and electrons on the local ground wire and transmits them to the output sockets, detects the grounding state and calculates the current input voltage and frequency.

[0005] Optionally, in the plug-and-play power protection device, a display screen for displaying input voltage and frequency is further provided on the front of the power strip housing, and the display screen is connected to the power protection circuit.

[0006] Optionally, in the plug-and-play power protection device, the power protection circuit includes a water-immersion non-touch protector, a control module, a power supply module, an input module and an output module;

[0007] The water-immersion non-touch protector is connected to the power supply module, the input module, the output module, the common ground wire and the local ground wire; the control module is connected to the power supply module, the input module and the output module; the input module is connected to the other end of the first power line, and the output module is connected to the output socket;

[0008] The submerged non-touch protector collects and absorbs discrete current and electrons on the local ground line except for the load, and transmits them to the neutral line output terminal;

[0009] The power supply module converts the input voltage into a DC power supply voltage for power supply, and the input module attenuates the input voltage according to a preset attenuation ratio and then outputs it to the control module;

[0010] The control module calculates the current input voltage and frequency according to the attenuated voltage, transmits the calculated values ​​to the display screen for display, and the control module also detects the grounding state and provides corresponding detection result prompts.

[0011] Optionally, in the plug-and-play electrical protection device, the live wire pin of the water-immersed touchless protector is connected to the power supply module, the input module and the live wire input terminal; the neutral wire pin of the water-immersed touchless protector is connected to the power supply module, the input module and the neutral wire input terminal; the FC pin of the water-immersed touchless protector is connected to the common ground wire, and the FG pin of the water-immersed touchless protector is connected to the local ground wire.

[0012] Optionally, in the plug-and-play power protection device, the control module includes a single-chip microcomputer, a differential unit for performing differential comparison on the voltages on the live wire, the neutral wire, the local ground wire and the common ground wire and outputting the comparison result, a position changer, a first indicator light, a second indicator light, a third indicator light and a first resistor;

[0013] The PB4 and PB5 pins of the single-chip microcomputer are both connected to the display screen, the AIN6 pin of the single-chip microcomputer is connected to the sliding end of the position changer, one end of the position changer is connected to the local ground line, the other end of the position changer is connected to the power supply end, the positive pole of the first indicator light is connected to the power supply end, the negative pole of the first indicator light is connected to one end of the first resistor, the other end of the first resistor is connected to the differential unit, the AIN0 to AIN5 pins of the single-chip microcomputer are all connected to the differential unit; the differential unit connects the live wire, the neutral wire, the common ground line, the starting point of the local ground line and the end point of the local ground line; the VDD pin, PA6 pin and VSS pin of the single-chip microcomputer are all connected to the power supply module, the AIN7 pin of the single-chip microcomputer is connected to the input module, the PA5 pin of the single-chip microcomputer is connected to the output module, the PB3 pin of the single-chip microcomputer is connected to the positive pole of the second indicator light, the PB2 pin of the single-chip microcomputer is connected to the positive pole of the third indicator light, and the negative poles of the second indicator light and the negative poles of the third indicator light are both connected to the local ground line.

[0014] Optionally, in the plug-and-play power protection device, the differential unit includes a first differential amplifier, a second differential amplifier, a third differential amplifier, a fourth differential amplifier, a fifth differential amplifier and a sixth differential amplifier;

[0015] The non-inverting input end of the first differential amplifier is connected to the live wire and the non-inverting input end of the third differential amplifier; the inverting input end of the first differential amplifier is connected to the inverting input end of the second differential amplifier, the inverting input end of the fifth differential amplifier, the inverting input end of the sixth differential amplifier and the common ground line; the output end of the first differential amplifier is connected to the AIN0 pin of the single-chip computer, the non-inverting input end of the second differential amplifier is connected to the neutral line and the inverting input end of the third differential amplifier, the output end of the second differential amplifier is connected to the AIN1 pin of the single-chip computer, the non-inverting input end of the fourth differential amplifier is connected to the non-inverting input end of the sixth differential amplifier, the end point of the local ground line and the other end of the first resistor, the inverting input end of the fourth differential amplifier is connected to the non-inverting input end of the fifth differential amplifier and the starting point of the local ground line, the output end of the third differential amplifier is connected to the AIN2 pin of the single-chip computer, the output end of the fourth differential amplifier is connected to the AIN3 pin of the single-chip computer, the output end of the fifth differential amplifier is connected to the AIN4 pin of the single-chip computer, and the output end of the sixth differential amplifier is connected to the AIN5 pin of the single-chip computer.

[0016] Optionally, in the plug-and-play power protection device, the power supply module includes a power chip, a second resistor and a switch; the VIN+ pin of the power chip is connected to the live wire pin, the input module and the live wire input end of the water-immersion touchless protector; the VIN- pin of the power chip is connected to the neutral wire pin, the input module and the neutral wire input end of the water-immersion touchless protector; the OUT pin of the power chip is connected to the power supply end, one end of the second resistor and the VDD pin of the microcontroller; the GND pin of the power chip is connected to one end of the switch, the VSS pin of the microcontroller and the local ground wire, and the other end of the switch is connected to the other end of the second resistor and the PA6 pin of the microcontroller.

[0017] Optionally, in the plug-and-play power protection device, the input module includes a voltage attenuator, the first pin of the voltage attenuator is connected to the live wire input terminal and the VIN+ pin of the power chip, the second pin of the voltage attenuator is connected to the neutral wire input terminal and the VIN- pin of the power chip, the third pin of the voltage attenuator is connected to the AIN7 pin of the microcontroller, and the fourth pin of the voltage attenuator is connected to the local ground wire.

[0018] Optionally, in the plug-and-play power protection device, the output module includes a relay, one end of the coil of the relay is connected to the power supply end, the other end of the coil of the relay is connected to the PA5 pin of the single-chip microcomputer, the first common point of the relay is connected to the second pin of the voltage attenuator and the neutral line input end, the first normally open contact of the relay is connected to the neutral line output end and the output socket, the second common point of the relay is connected to the first pin of the voltage attenuator and the live wire input end, and the second normally open contact of the relay is connected to the live wire output end and the output socket.

[0019] A second aspect of an embodiment of the present invention provides a socket appliance, comprising a housing, in which a leakage protector, a leakage air switch, a plurality of sockets, a zero row, a ground row, a second power line and the plug-and-play power protection device are installed;

[0020] One end of the second power cord is provided with a power plug, and the other end of the second power cord extends into one side of the shell and is connected to the leakage protector and the neutral row, and the leakage protector is connected to the leakage air switch; the power input plug of the power protection device is inserted into any socket, the leakage air switch is connected to several sockets, and the neutral row and the ground row are both connected to the power protection device.

[0021] In the technical solution provided by the embodiment of the present invention, the plug-and-play power protection device includes a power strip housing and a first power cord, wherein a circuit board and a plurality of parallel output sockets are arranged in the power strip housing, the circuit board is provided with a power protection circuit, and the front of the power strip housing is provided with a plurality of sockets matched with the output sockets; the power protection circuit is connected to the output socket, one end of the first power cord is provided with a power input plug, and the other end of the first power cord extends into one side of the power strip housing and is connected to the power protection circuit; the power protection circuit collects and absorbs discrete currents and electrons on the local ground wire and transmits them to the output socket, detects the grounding state and calculates the current input voltage and frequency. The housing of the power protection device is a power strip type, the power input plug can be plugged into other sockets, and the output socket is connected to the load, which is plug-and-play and can be used directly without professional installation, solving the problem of inconvenient installation of the existing anti-leakage device when water enters. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of a plug-and-play power protection device in an embodiment of the present invention.

[0023] Figure 2 The figure is a circuit diagram of a plug-and-play power protection device in an embodiment of the present invention.

[0024] Figure 3 Schematic diagram of a three-core cable reel in an embodiment of the present invention.

[0025] Figure 4 Schematic diagram of a circuit of a socket appliance in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The embodiments of the present invention and all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0027] Please also see Figure 1 and Figure 2 The plug-and-play power protection device 10 provided in the embodiment of the present invention includes a power strip housing 110 and a first power cord 120. A circuit board and a plurality of parallel output sockets (output socket 1 to output socket n) are arranged in the power strip housing 110. A power protection circuit 130 is arranged on the circuit board. A plurality of sockets matched with the output sockets are arranged on the front of the power strip housing. The power protection circuit 130 is connected to the output socket 160. One end of the first power cord is provided with a power input plug 150. The other end of the first power cord extends into one side of the power strip housing and is connected to the internal power protection circuit 130. The power protection circuit 130 collects and absorbs discrete currents and electrons on the local ground wire and transmits them to the output socket 160, detects the grounding state and calculates the current input voltage and frequency.

[0028] In this embodiment, the appearance of the power protection device is designed to be a power strip type. The power input plug at one end can be plugged into other sockets, and the output socket is connected to the load. It is plug-and-play and does not require professional installation. The internal power protection circuit 130 realizes leakage protection when water enters, making it easier to obtain power safety protection.

[0029] In specific implementation, the length of the first power cord 120 can be shortened, and the power input plug 150 can be set on the back of the power strip housing 110 for easy carrying. The length of the first power cord 120 can also be extended to facilitate long-distance connection, and a receiving cavity can be added on the back of the power strip housing 110 to place the first power cord 120. After the first power cord 120 is wound around the receiving cavity, the power input plug 150 is clamped in the card slot on the side of the receiving cavity.

[0030] Preferably, a display screen 140 for displaying input voltage and frequency is also provided on the front of the power strip housing. A transparent window may be provided on the front of the power strip housing, and the display screen 140 is located below the transparent window and connected to the power protection circuit 130. The display screen 140 may also be directly embedded in the front of the power strip housing, and the specific installation method is not limited here.

[0031] The output socket 160 can be set in a three-dimensional or flat shape. The output socket 160 can be directly connected to the load, or it can be connected to a three-core wire reel. Figure 3 As shown, the voltage plug 20 of the three-core cable drum is inserted into the output socket 160. Because the three-core cable drum has a long ground wire, the effect of preventing leakage can be enhanced, and the combination of the two is very suitable for outdoor disaster relief in wind and rain.

[0032] like Figure 2As shown, the power protection circuit 130 includes a water-immersion touch-free protector 131, a control module 132, a power supply module 133, an input module 134 and an output module 135; the water-immersion touch-free protector 131 is connected to the power supply module 133, the input module 134, the output module 135, the common ground line CGND and the local ground line LGND; the control module 132 is connected to the power supply module 133, the input module 134 and the output module 135; the input module 134 is connected to the other end of the first power line, and the output module 135 is connected to the output socket 160.

[0033] Among them, the control module 132, the power supply module 133, the input module 134 and the output module 135 are integrated together to form a protection total module 80 (such as Figure 4 As shown), the water-immersion touch-free protector 131 is an independent module. The water-immersion touch-free protector 131 collects and absorbs discrete currents and electrons other than the load on the local ground line LGND, and transmits them to the neutral line output terminal N_OUT. The power supply module 133 steps down the input voltage (here is the mains) and converts it into a DC power supply voltage to supply power. The input module 134 attenuates the input voltage according to a preset attenuation ratio and outputs it to the control module 132; the control module 132 calculates the current input voltage and frequency based on the attenuated voltage, and transmits the calculated values ​​to the display screen 140 for display. The control module 132 also detects the grounding state and provides corresponding detection result prompts.

[0034] The model of the water-free touch-free protector 131 is preferably TPT-3, and the live wire pin L1 of the water-free touch-free protector 131 is connected to the power supply module 133, the input module 134 and the live wire input terminal L_IN; the neutral wire pin N1 of the water-free touch-free protector 131 is connected to the power supply module 133, the input module 134 and the neutral wire input terminal N_IN; the FC pin of the water-free touch-free protector 131 is connected to the common ground wire CGND, and the FG pin of the water-free touch-free protector 131 is connected to the local ground wire LGND.

[0035] Among them, after the submerged non-touch protector 131 is powered on, it starts to work uninterruptedly, collecting all discrete currents and electrons on the conductor (i.e., the local ground wire) except for the load. After collecting these discrete currents and electrons, the electric field function is immediately turned on to absorb these discrete currents and electrons back into the electric field (when there are discrete currents and electrons, absorption begins), and then the absorbed currents and electrons are returned to the power output (i.e., the zero line output terminal N_OUT on the output socket) uninterruptedly for use as power supply current. Since the discrete currents and electrons are captured, there is only voltage in the water, but no current, and the load current of the electrical appliance continues to exist; therefore, in the water and in the environment of heavy rain, as long as the electrical appliances are reliably connected and grounded, the human body will not be electrocuted, and the electrical appliances will work normally.

[0036] The control module 132 includes a single-chip microcomputer U1, a differential unit for differentially comparing the voltages on the live wire, the neutral wire, the local ground wire and the common ground wire and outputting the comparison result, a position changer VR, a first indicator light LED1, a second indicator light LED2, a third indicator light LED3 and a first resistor R1; the PB4 pin and the PB5 pin of the single-chip microcomputer U1 are both connected to the display screen 140, the AIN6 pin of the single-chip microcomputer U1 is connected to the sliding end of the position changer VR, one end of the position changer VR is connected to the local ground wire, the other end of the position changer VR is connected to the power supply end, the positive electrode of the first indicator light LED1 is connected to the power supply end, the negative electrode of the first indicator light LED1 is connected to one end of the first resistor R1, and the other end of the first resistor R1 is connected to the differential The differential unit is divided into two parts, and the AIN0 to AIN5 pins of the single-chip computer U1 are all connected to the differential unit; the differential unit is connected to the live wire L, the neutral wire N, the common ground wire CGND, the starting point LGND_SP of the local ground wire and the end point LGND_EP of the local ground wire; the VDD pin, PA6 pin and VSS pin of the single-chip computer U1 are all connected to the power supply module 133, the AIN7 pin of the single-chip computer U1 is connected to the input module 134, the PA5 pin of the single-chip computer U1 is connected to the output module 135, the PB3 pin of the single-chip computer U1 is connected to the positive electrode of the second indicator light LED2, the PB2 pin of the single-chip computer U1 is connected to the positive electrode of the third indicator light LED3, and the negative electrode of the second indicator light LED2 and the negative electrode of the third indicator light LED3 are both connected to the local ground wire.

[0037] The model of the single chip microcomputer U1 is preferably NY8B062D, and the positioner VR is used to adjust the sensitivity of the single chip microcomputer U1 (there is a manual adjustment button outside). The power supply module 133 is an AC to DC power supply module that can provide a +5V supply voltage to power the single chip microcomputer U1.

[0038] The single-chip computer U1 starts working, and the first indicator LED1 is lit (it will be off if there is no power supply voltage). The single-chip computer U1 determines whether the grounding is normal based on the comparison result of the differential unit 1321 on the local ground line and the common ground line. When the mains ground line is normal, the second indicator LED2 will light up green (if abnormal, it will light up red). When the back-stage ground line is normal, the third indicator LED3 will light up green (if abnormal, it will light up red). If two green lights are not on, the power protection device 10 can only be used as a general power strip and do not operate dangerously. If two green lights are on, the power protection device 10 can operate normally when immersed in water and has leakage protection.

[0039] In the specific implementation, three transparent round windows are set on the front of the power strip housing, and an indicator light is directly below each transparent round window, so that when the corresponding indicator light is lit, it is convenient for the user to understand the working status and grounding status. In order to protect the second indicator light LED2 and the third indicator light LED3, a resistor can be connected in series between the PB3 pin of the single-chip microcomputer U1 and the positive electrode of the second indicator light LED2, and a resistor can be connected in series between the PB2 pin of the single-chip microcomputer U1 and the positive electrode of the third indicator light LED3, and protection is performed by resistor current limiting.

[0040] In this embodiment, six high-impedance differentials are used, that is, the differential unit includes a first differential amplifier OP1, a second differential amplifier OP2, a third differential amplifier OP3, a fourth differential amplifier OP4, a fifth differential amplifier OP5 and a sixth differential amplifier OP6; the in-phase input end of the first differential amplifier OP1 is connected to the live wire L and the in-phase input end of the third differential amplifier OP3; the inverting input end of the first differential amplifier OP1 is connected to the inverting input end of the second differential amplifier OP2, the inverting input end of the fifth differential amplifier OP5, the inverting input end of the sixth differential amplifier OP6 and a common ground line; the output end of the first differential amplifier OP1 is connected to the AIN0 pin of the single-chip computer U1, and the in-phase input end of the second differential amplifier OP2 is connected to the neutral line N and the third differential amplifier The inverting input end of the fourth differential amplifier OP4 is connected to the inverting input end of the sixth differential amplifier OP6, the end point LGND_EP of the local ground line and the other end of the first resistor R1, the inverting input end of the fourth differential amplifier OP4 is connected to the inverting input end of the fifth differential amplifier OP5 and the starting point LGND_SP of the local ground line, the output end of the third differential amplifier OP3 is connected to the AIN2 pin of the single-chip computer U1, the output end of the fourth differential amplifier OP4 is connected to the AIN3 pin of the single-chip computer U1, the output end of the fifth differential amplifier OP5 is connected to the AIN4 pin of the single-chip computer U1, and the output end of the sixth differential amplifier OP6 is connected to the AIN5 pin of the single-chip computer U1.

[0041] Among them, the first differential amplifier OP1 realizes the comparison between the live wire and the neutral wire, the second differential amplifier OP2 realizes the comparison between the neutral wire and the common ground wire CGND, the third differential amplifier OP3 realizes the comparison between the live wire and the neutral wire, the fourth differential amplifier OP4 realizes the comparison between the end point LGND_EP of the local ground wire and the starting point LGND_SP of the local ground wire, the fifth differential amplifier OP5 realizes the comparison between the starting point LGND_SP of the local ground wire and the common ground wire CGND, and the sixth differential amplifier OP6 realizes the comparison between the local ground wire LGND and the common ground wire CGND. When the switch S in the power supply module 133 is pressed, the voltage on each ground wire at this time is read and the comparison results (voltage values) output by the six differential amplifiers are stored as standard voltages. If the standard voltage is greater than the voltage value on the AIN6 pin, it is judged to be abnormal.

[0042] Preferably, in order to prevent the high voltage from burning the single-chip microcomputer, a resistor is connected to the non-inverting input terminal of each differential amplifier, and a resistor is connected to the inverting input terminal. The resistance of these two resistors is preferably 100MΩ, and two 100MΩ high-impedance voltage-dividing resistors are used for attenuation; a resistor with a resistance of preferably 1MΩ is connected between the non-inverting input terminal and the inverting input terminal. In this way, there is at least 510KΩ between the six-way high-impedance differential circuit and the ground, which can prevent damage caused by high voltage.

[0043] The power supply module 133 includes a power chip U2, a second resistor R2 and a switch SW; the VIN+ pin of the power chip U2 is connected to the live wire pin L1 of the water-immersion touch-free protector 131, the input module 134 and the live wire input terminal L_IN; the VIN- pin of the power chip U2 (i.e., the positive voltage input of the AC power) is connected to the neutral wire pin N1 of the water-immersion touch-free protector 131, the input module 134 and the neutral wire input terminal N_IN; the OUT pin of the power chip U2 is connected to the power supply end (providing a +5V power supply voltage), one end of the second resistor R2 and the VDD pin of the microcontroller U1; the GND pin of the power chip U2 is connected to one end of the switch SW, the VSS pin of the microcontroller U1 and the local ground line LGND, and the other end of the switch SW is connected to the other end of the second resistor R2 and the PA6 pin of the microcontroller U1.

[0044] Among them, the switching power supply chip U2 supports 100-240V AC input, and outputs 5V DC voltage after step-down conversion. The switching power supply chip U2 can use all existing power modules that can realize AC to DC 5V output. The specific pins are modified according to the model. The model is not limited here. The second resistor R2 is a pull-up resistor; the switch S is normally open. When it is necessary to read the voltage on each ground line, it is pressed to generate a low-level pulse signal to the microcontroller U1. The microcontroller U1 can read the comparison results of the 6 differential amplifier outputs and compare them with the voltage value on the AIN6 pin to determine whether the grounding is abnormal.

[0045] The input module 134 includes a voltage attenuator U3 (also called a mutual inductor, which can sense both frequency and voltage) with an attenuation ratio of 1:400 or 1:100. The first pin of the voltage attenuator U3 is connected to the live input terminal L_IN and the VIN+ pin of the power chip U2. The second pin of the voltage attenuator U3 is connected to the neutral input terminal N_IN and the VIN- pin of the power chip U2. The third pin of the voltage attenuator U3 is connected to the AIN7 pin of the single-chip computer U1. The fourth pin of the voltage attenuator U3 is connected to the local ground line LGND. The voltage attenuator U3 attenuates the input voltage (here, the mains power supply) transmitted by the power input plug and then transmits it to the single-chip computer U1. The attenuation of the voltage attenuator U3 can prevent the mains high voltage from burning the single-chip computer. The current mains voltage and frequency can be calculated according to the attenuated voltage by setting the attenuation ratio, and the calculated value is transmitted to the display screen 140 for display, so that the user can understand the current voltage situation.

[0046] like Figure 2 As shown, there are a mark V (indicating voltage) and a mark HZ (indicating frequency) on the display screen 140, and corresponding light-emitting diodes are provided below the marks; when displaying voltage, the light-emitting diode corresponding to the mark V is lit up to make the mark V emit light, and the voltage value is displayed to the right or below the mark V; when displaying frequency, the light-emitting diode corresponding to the mark HZ is lit up to make the mark HZ emit light, and the frequency value is displayed to the right or below the mark HZ.

[0047] The output module 135 includes a relay, one end of the coil of the relay is connected to the power supply end, the other end of the coil of the relay is connected to the PA5 pin of the microcontroller U1, the first common point of the relay is connected to the second pin of the voltage attenuator U3 and the neutral line input terminal N_IN, the first normally open contact of the relay is connected to the neutral line output terminal N_OUT and the output socket 160, the second common point of the relay is connected to the first pin of the voltage attenuator U3 and the live line input terminal L_IN, and the second normally open contact of the relay is connected to the live line output terminal L_OUT and the output socket 160.

[0048] When there is a supply voltage at the power supply end, the coil of the relay is energized to close the two normally open contacts, so that the neutral input terminal N_IN is connected to the neutral output terminal N_OUT, the live input terminal L_IN is connected to the live output terminal L_OUT, and the output socket 160 is powered normally. When there is no supply voltage, the two normally open contacts are separated, the neutral input terminal N_IN is disconnected from the neutral output terminal N_OUT, the live input terminal L_IN is disconnected from the live output terminal L_OUT, and the output socket 160 is without power. As long as the two normally open contacts can be closed when power is on, such as Figure 2 The relays of the structures shown are all within the protection range, and their models are not limited here.

[0049] Please also read Figure 3Based on the above-mentioned plug-and-play power protection device 10, an embodiment of the present invention further provides a socket appliance, which includes a shell, in which the power protection device 10, a leakage protector 30, a leakage air switch 40, a plurality of parallel sockets 50, a zero row 60, a ground row 70 and a second power cord are installed, and the shell is provided with a plurality of sockets paired with the socket 50; one end of the second power cord is provided with a power plug for connecting to a 220V mains power supply, and the other end of the second power cord extends into one side of the shell and connects the leakage protector 30 and the zero row 60, and the leakage protector 30 is connected to the leakage air switch 40; the power input plug 150 of the power protection device 10 is inserted into any one of the sockets 50, the leakage air switch 40 is connected to a plurality of sockets 50, and the zero row 60 and the ground row 70 are both connected to the power protection device 10.

[0050] The power protection device 10 is divided into a total protection module 80 (which integrates a control module 132, a power supply module 133, an input module 134 and an output module 135) and a water-immersion non-touch protector 131; the total protection module is used for current limiting protection, and will trip when the current passing through is greater than the limit value, and can also display the current input voltage, frequency and grounding status detection results; the water-immersion non-touch protector 131 will ionize and separate the leakage to its FG pin when there is leakage, and there is a metal sheet on the FG pin that can absorb discrete current and electrons to prevent electric shock. The leakage protector 30 and the leakage air switch 40 are both leakage detection switches, which will trip when the leakage current is greater than the set value.

[0051] In specific implementation, Figure 4As shown, the leakage protector 30 and the leakage air switch 40 are common existing equipment, and the submerged non-touch protector 131 can adopt TPT (Top Prime Technology) equipment. Then the live wire of the second power line is connected to the live wire input end of the leakage protector 30, the neutral wire of the second power line is connected to the neutral wire input end of the leakage protector 30, the live wire output end of the leakage protector 30 is connected to the live wire input end of the leakage air switch 40 through the live wire, the neutral wire output end of the leakage protector 30 is connected to the neutral wire input end of the leakage air switch 40 through the neutral wire, the live wire output end of the leakage air switch 40 is connected to the live wire end of several sockets 50 through the live wire, and the neutral wire output end of the leakage air switch 40 is connected to the neutral wire end of several sockets 50 through the neutral wire; the power input socket of the power protection device 10 When the head 150 is inserted into any socket 50, the live wire terminal of the protection main module 80 and the live wire pin L1 of the submersible non-touch protector 131 are respectively connected to the live wire terminal of the socket 50 through the live wire, and the neutral wire terminal of the protection main module 80 and the neutral wire pin N1 of the submersible non-touch protector 131 are respectively connected to the neutral wire terminal of the socket 50 through the neutral wire; the FG pin of the submersible non-touch protector 131 is connected to the ground bus 70, the ground terminals of each socket 50 and the local ground terminal of the protection main module 80 through the local ground wire; the FC pin of the submersible non-touch protector 131 is connected to the neutral bus 60 and the common ground terminal of the protection main module 80 through the common ground wire.

[0052] It is important to understand that Figure 4 L and N in the figure represent the live wire and the neutral wire respectively, representing the type of connection between two devices; the minimum diameter of the local ground wire is 6 mm. The power protection device 10 can also be installed in the main power switch box, and its specific use environment is not limited here.

[0053] In summary, the plug-and-play power protection device and socket electrical appliance provided by the present invention collect all discrete currents and electrons on the wire except the load through the water-immersed non-touch protector. After collecting these currents and electrons, the electric field function is immediately turned on to absorb these discrete currents and electrons back into the electric field, and then the absorbed currents and electrons are continuously returned to the neutral line output end to be used as the power supply current, so that normal operation under water immersion can be achieved and there is leakage protection. Since the appearance design of the power protection device is a power strip type, the power input plug at one end can be plugged into other sockets, and the output socket is connected to the load, which is plug-and-play and can be used directly without installation by professionals, which greatly facilitates user operation. In actual application, the output socket of the power protection device can be connected to a three-core wire reel. Since the three-core wire reel has a long ground wire, the leakage protection effect can be enhanced.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A plug-and-play power protection device, It is characterized in that The invention comprises a power strip housing and a first power cord, wherein a circuit board and a plurality of parallel output sockets are arranged in the power strip housing, a power protection circuit is arranged on the circuit board, and a plurality of sockets matched with the output sockets are arranged on the front of the power strip housing; the power protection circuit is connected to the output sockets, one end of the first power cord is provided with a power input plug, and the other end of the first power cord extends into one side of the power strip housing and is connected to the power protection circuit; the power protection circuit collects and absorbs discrete currents and electrons on the local ground wire and transmits them to the output sockets, detects the grounding state and calculates the current input voltage and frequency; The water-immersion non-touch protector in the power protection circuit works continuously, collects and absorbs discrete current and electrons other than the load on the local ground line, turns on the electric field function, absorbs the discrete current and electrons back into the electric field and transmits them to the neutral line output end for use as power supply current; The live wire pin of the water-immersed non-touch protector is connected to the live wire input terminal, and the neutral wire pin of the water-immersed non-touch protector is connected to the neutral wire input terminal; The FC pin of the water-immersion non-touch protector is connected to the common ground wire, and the FG pin of the water-immersion non-touch protector is connected to the local ground wire.

2. The plug-and-play power protection device according to claim 1, It is characterized in that A display screen for displaying input voltage and frequency is also provided on the front of the power strip housing, and the display screen is connected to the power protection circuit.

3. The plug-and-play power protection device according to claim 2, It is characterized in that The power protection circuit includes a water-immersion non-touch protector, a control module, a power supply module, an input module and an output module; The water-immersion non-touch protector is connected to the power supply module, the input module, the output module, the common ground wire and the local ground wire; the control module is connected to the power supply module, the input module and the output module; the input module is connected to the other end of the first power line, and the output module is connected to the output socket; The submerged non-touch protector collects and absorbs discrete current and electrons on the local ground line except for the load, and transmits them to the neutral line output terminal; The power supply module converts the input voltage into a DC power supply voltage for power supply, and the input module attenuates the input voltage according to a preset attenuation ratio and then outputs it to the control module; The control module calculates the current input voltage and frequency according to the attenuated voltage, transmits the calculated values ​​to the display screen for display, and the control module also detects the grounding state and provides corresponding detection result prompts.

4. The plug-and-play power protection device according to claim 3, It is characterized in that The live wire pin of the water-immersed touch-free protector is connected to the power supply module, the input module and the live wire input end; the neutral wire pin of the water-immersed touch-free protector is connected to the power supply module, the input module and the neutral wire input end; the FC pin of the water-immersed touch-free protector is connected to the common ground wire, and the FG pin of the water-immersed touch-free protector is connected to the local ground wire.

5. The plug-and-play power protection device according to claim 4, It is characterized in that The control module includes a single chip microcomputer, a differential unit for performing differential comparison on the voltages on the live wire, the neutral wire, the local ground wire and the common ground wire and outputting the comparison result, a position changer, a first indicator light, a second indicator light, a third indicator light and a first resistor; The PB4 and PB5 pins of the single-chip microcomputer are both connected to the display screen, the AIN6 pin of the single-chip microcomputer is connected to the sliding end of the position changer, one end of the position changer is connected to the local ground wire, the other end of the position changer is connected to the power supply end, the positive electrode of the first indicator light is connected to the power supply end, the negative electrode of the first indicator light is connected to one end of the first resistor, the other end of the first resistor is connected to the differential unit, and the AIN0 to AIN5 pins of the single-chip microcomputer are all connected to the differential unit; The differential unit connects the live wire, the neutral wire, the common ground wire, the starting point of the local ground wire and the end point of the local ground wire; The VDD pin, PA6 pin and VSS pin of the single-chip computer are all connected to the power supply module, the AIN7 pin of the single-chip computer is connected to the input module, the PA5 pin of the single-chip computer is connected to the output module, the PB3 pin of the single-chip computer is connected to the positive pole of the second indicator light, the PB2 pin of the single-chip computer is connected to the positive pole of the third indicator light, and the negative poles of the second indicator light and the negative poles of the third indicator light are both connected to the local ground wire.

6. The plug-and-play power protection device according to claim 5, It is characterized in that The differential unit includes a first differential amplifier, a second differential amplifier, a third differential amplifier, a fourth differential amplifier, a fifth differential amplifier and a sixth differential amplifier; The non-inverting input end of the first differential amplifier is connected to the live wire and the non-inverting input end of the third differential amplifier; the inverting input end of the first differential amplifier is connected to the inverting input end of the second differential amplifier, the inverting input end of the fifth differential amplifier, the inverting input end of the sixth differential amplifier and the common ground line; the output end of the first differential amplifier is connected to the AIN0 pin of the single-chip computer, the non-inverting input end of the second differential amplifier is connected to the neutral line and the inverting input end of the third differential amplifier, the output end of the second differential amplifier is connected to the AIN1 pin of the single-chip computer, the non-inverting input end of the fourth differential amplifier is connected to the non-inverting input end of the sixth differential amplifier, the end point of the local ground line and the other end of the first resistor, the inverting input end of the fourth differential amplifier is connected to the non-inverting input end of the fifth differential amplifier and the starting point of the local ground line, the output end of the third differential amplifier is connected to the AIN2 pin of the single-chip computer, the output end of the fourth differential amplifier is connected to the AIN3 pin of the single-chip computer, the output end of the fifth differential amplifier is connected to the AIN4 pin of the single-chip computer, and the output end of the sixth differential amplifier is connected to the AIN5 pin of the single-chip computer.

7. The plug-and-play power protection device according to claim 5, It is characterized in that The power supply module includes a power chip, a second resistor and a switch; the VIN+ pin of the power chip is connected to the live pin of the water-immersion non-touch protector, the input module and the live input end; the VIN- pin of the power chip is connected to the neutral pin of the water-immersion non-touch protector, the input module and the neutral input end; The OUT pin of the power chip is connected to the power supply end, one end of the second resistor and the VDD pin of the microcontroller; The GND pin of the power chip is connected to one end of the switch, the VSS pin of the microcontroller and the local ground wire, and the other end of the switch is connected to the other end of the second resistor and the PA6 pin of the microcontroller.

8. The plug-and-play power protection device according to claim 5, It is characterized in that The input module comprises a voltage attenuator, wherein the first pin of the voltage attenuator is connected to the live wire input terminal and the VIN+ pin of the power chip, the second pin of the voltage attenuator is connected to the neutral wire input terminal and the VIN- pin of the power chip, the third pin of the voltage attenuator is connected to the AIN7 pin of the single-chip computer, and the fourth pin of the voltage attenuator is connected to the local ground wire.

9. The plug-and-play power protection device according to claim 8, It is characterized in that The output module includes a relay, one end of the coil of the relay is connected to the power supply end, the other end of the coil of the relay is connected to the PA5 pin of the single-chip microcomputer, the first common point of the relay is connected to the second pin of the voltage attenuator and the neutral line input end, the first normally open contact of the relay is connected to the neutral line output end and the output socket, the second common point of the relay is connected to the first pin of the voltage attenuator and the live line input end, and the second normally open contact of the relay is connected to the live line output end and the output socket.

10. A socket appliance, It is characterized in that It comprises a housing, in which a leakage protector, a leakage air switch, a plurality of sockets, a zero row, a ground row, a second power line and a plug-and-play power protection device as claimed in any one of claims 1 to 9 are installed; One end of the second power cord is provided with a power plug, and the other end of the second power cord extends into one side of the shell and is connected to the leakage protector and the neutral row, and the leakage protector is connected to the leakage air switch; the power input plug of the power protection device is inserted into any socket, the leakage air switch is connected to several sockets, and the neutral row and the ground row are both connected to the power protection device.

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