CN112242690A - Electric shock prevention device - Google Patents
Electric shock prevention device Download PDFInfo
- Publication number
- CN112242690A CN112242690A CN202011194274.0A CN202011194274A CN112242690A CN 112242690 A CN112242690 A CN 112242690A CN 202011194274 A CN202011194274 A CN 202011194274A CN 112242690 A CN112242690 A CN 112242690A
- Authority
- CN
- China
- Prior art keywords
- unit
- overvoltage protection
- triode
- voltage
- resistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses an electric shock prevention device, which comprises: the testing device comprises an outer shell, a testing button and a switch button, wherein the outer shell is provided with the testing button and the switch button; the electric field absorption shielding unit enables the spherical point position of the external conductor to be 0; the electric leakage collection unit and the electric field absorption shielding unit are both arranged on the circuit board and are used for shielding electric leakage current and absorbing discrete current generated when the electric appliance is immersed in water; and the protection unit is used for triggering the electric field shielding unit and the electric leakage detection unit when an abnormal working condition is detected. The technical problems that in the prior art, the line is easy to have electric leakage and electric shock risks when being soaked in water, thunder or aging, and the safety performance is poor are solved.
Description
Technical Field
The embodiment of the application relates to the technical field of electrical elements, in particular to an electric shock prevention device.
Background
When the circuit is used in the process of soaking or aging, the leakage current is relatively increased due to the increase of the conducting value or the reduction of the insulation resistance value, the circuit generates heat to cause the circuit to be on fire, and the danger of electric shock is easy to occur. In addition, when the circuit is subjected to lightning, electric leakage or circuit fire is easily caused, and high potential safety hazard exists.
Disclosure of Invention
Therefore, the embodiment of the application provides an electric shock prevention device to at least partially solve the technical problems that in the prior art, when a circuit is immersed in water, thunder or aging, the risk of electric leakage and electric shock easily occurs, and the safety performance is poor.
In order to solve the above technical problem, an embodiment of the present application provides the following technical solutions:
an electric shock protection device comprising:
the testing device comprises an outer shell, a testing button and a switch button, wherein the outer shell is provided with the testing button and the switch button;
the electric field absorption shielding unit enables the spherical point position of the external conductor to be 0;
the electric leakage collection unit and the electric field absorption shielding unit are both arranged on the circuit board and are used for shielding electric leakage current and absorbing discrete current generated when the electric appliance is immersed in water;
and the protection unit is used for triggering the electric field shielding unit and the electric leakage detection unit when an abnormal working condition is detected.
Further, the protection unit includes at least one of an overvoltage protection unit, an undervoltage protection unit, an overcurrent protection unit, and a lightning protection unit.
Further, the overvoltage protection unit includes:
the first overvoltage protection unit is electrically connected with the main control unit of the electric shock prevention device;
the second overvoltage protection unit is electrically connected with the main control unit of the electric shock prevention device;
the first overvoltage protection unit is electrically connected with the second overvoltage protection unit.
Further, the first overvoltage protection unit comprises a first voltage stabilizing diode, a first overvoltage protection resistor, a second overvoltage protection resistor, a first overvoltage protection capacitor and a first triode;
the cathode of the first voltage stabilizing diode is electrically connected with the second overvoltage protection unit, and the anode of the first voltage stabilizing diode is grounded after passing through the second overvoltage protection resistor and the first overvoltage protection resistor in sequence;
the two ends of the first overvoltage protection capacitor are connected with the two ends of the first overvoltage protection resistor in parallel, the base of the first triode is electrically connected with the serially connected nodes of the second overvoltage protection resistor and the first overvoltage protection resistor, the collector of the first triode is electrically connected with the main control unit, and the emitter of the first triode is grounded.
Further, the second overvoltage protection unit comprises a second voltage stabilizing diode, a third overvoltage protection resistor, a fourth overvoltage protection resistor and a second triode;
the base electrode of the first triode is electrically connected with the cathode electrode of the second voltage-stabilizing diode, and the collector electrode of the second triode is used as the voltage input end of the second overvoltage protection unit;
the emitting electrode of the second triode is electrically connected with the main control unit, the anode of the second voltage stabilizing diode is grounded, two ends of the third overvoltage protection resistor are respectively and electrically connected with the base electrode and the collector electrode of the first triode, and two ends of the fourth overvoltage protection resistor are respectively and electrically connected with the base electrode and the emitting electrode of the second triode.
Further, the under-voltage protection unit includes:
the under-voltage protection circuit comprises a first under-voltage protection resistor, a second under-voltage protection resistor, a third under-voltage protection resistor, a first voltage regulator tube and a first diode;
one end of the first undervoltage protection resistor is connected with a power supply of a secondary side circuit, and the other end of the first undervoltage protection resistor is respectively connected with one end of the second undervoltage protection resistor and the negative electrode end of the first voltage-regulator tube;
the other end of the second undervoltage protection resistor is connected with the emitter end of the first PNP type triode;
one end of the third undervoltage protection resistor is connected with a power supply of the secondary side circuit, and the other end of the third undervoltage protection resistor is connected with an emitter terminal of the second PNP type triode;
the collector end of the second PNP type triode is connected with the positive end of the light-emitting diode of the optocoupler, and the base end of the second PNP type triode is connected with the positive end of the first voltage-regulator tube and the base end of the first PNP type triode;
the collector terminal of the first PNP type triode is connected with the control terminal of the voltage reference source through the first diode which is connected positively; the positive end of the voltage reference source and the negative end of the light-emitting diode of the optocoupler are grounded, and the negative end of the first diode leads out multi-path output.
Further, the master control unit is a single chip microcomputer or an integrated circuit chip.
Further, the outer shell is an insulating shell.
Further, the insulating shell comprises an insulating base and an insulating cover plate which are detachably connected.
Further, still include the control system, the control system includes:
the current absorption module is used for shielding leakage current and absorbing discrete current generated when the electric appliance is immersed in water when the leakage current is not higher than a threshold value;
the circuit insulation value acquisition module is used for acquiring a circuit insulation resistance value and sending a starting instruction to the current absorption module when the circuit insulation resistance value is lower than a preset resistance value;
the lightning intensity acquisition module is used for acquiring the environmental lightning intensity and sending a starting instruction to the current absorption module when the environmental lightning intensity is higher than a preset value;
and the fault detection module is used for automatically detecting the operation of the circuit when the power-on device is started, and if a fault occurs, a flashing instruction is sent to the indicating lamp, and an automatic closing instruction is sent after the fault is eliminated.
In one or more specific embodiments, the electric shock prevention device provided by the invention has the following technical effects:
the electric shock prevention device provided by the invention does not cut off the power when detecting the occurrence of the electric leakage condition within the safe electric leakage range, displays the electric leakage information and gives out early warning through the electric leakage display unit, and cuts off the circuit when exceeding the safe electric leakage range. The leakage current can be shielded, the water immersion can prevent electric shock, and the water carrying work can be realized; the fire is prevented, and the fire caused by circuit aging is prevented; lightning protection and radiation protection, and is suitable for various places; the device can detect, eliminate and ensure the electricity safety of dangerous electricity utilization conditions, fundamentally stop electricity utilization accidents, break through and make up the technical defects of post protection in the prior art, and realize pre-protection. The technical problems that in the prior art, the line is easy to have electric leakage and electric shock risks when being soaked in water, thunder or aging, and the safety performance is poor are solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope of the present invention.
Fig. 1 is a block diagram of an embodiment of an anti-creeping device according to the present invention.
Description of reference numerals:
10-main control unit 20-electric leakage acquisition unit 30-electric field shielding unit
40-overvoltage protection unit 50-undervoltage protection unit 60-overcurrent protection unit
70-lightning protection unit
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The common air switch in the present family is, every family will install an air switch and guarantee the circuit safety of family. However, people often neglect another thing which is also important, and the circuit protector plays a very important role in circuit protection. The electric shock prevention device is a circuit protector used for the external connection of the circuit, can shield current leakage, avoids the electric leakage and electric shock risks caused by the immersion, aging or thunder and lightning of the circuit, and improves the safety performance of electric appliances.
In one embodiment, as shown in fig. 1, the electric shock protection device provided by the present invention includes an outer casing, an electric field shielding unit 30, a leakage current collecting unit 20, and a protection unit. The outer shell is provided with a test key and a switch key, and the electric field absorption shielding unit enables the spherical point position of the outer conductor to be 0; electric leakage acquisition unit 20 with the electric field absorbs the shielding unit and all installs on the circuit board, electric leakage acquisition unit 20 is used for shielding leakage current to absorb the discrete current that the electrical apparatus produced when soaking, the protection unit is used for when detecting unusual operating mode, triggers electric field shielding unit 30 with the electric leakage detecting element.
The device is used as a conductor connected outside a circuit, obtains the absorption and shielding effects of an electric field, enables the potential of the conductor to be 0, has no harm to a human body, and can continuously work in the conductor. In principle, the electric field attraction effect is utilized, the conductor is always at the potential of 0 through the electric field shielding unit 30, and when the conductor is immersed in water, a circuit is arranged to absorb current like a black hole instead of leaking current into the water, so that people do not get an electric shock in the water. When the wire is used for a long time in the circuit, the insulation skin is aged, the insulation resistance value is reduced, the leakage current is relatively increased, and the circuit generates heat to cause the circuit to be on fire. If intelligent safety electricity consumption is installed in the circuit, leakage current in the circuit can be effectively absorbed, and the leakage current is shielded in time, so that electrical fire caused by circuit leakage is greatly reduced. In thunderstorm seasons, intelligent safety electricity is connected in parallel to play a surge (lightning rod) function in a circuit. The electromagnetic interference generated by the electric appliance in operation is fully absorbed and shielded. And starting the machine to automatically detect the operation of the line, and if the fault indicator light flickers to the fault type, removing the fault and automatically reclosing the switch.
In order to facilitate observation, the leakage current condition is output in time to realize early warning, and the device further comprises a leakage display unit which is electrically connected with the leakage acquisition unit 20. The display range of the leakage display unit can be-99A, the leakage display unit can be a digital display screen, and can also be a voltage and current value display nixie tube, for example, a 2-bit 8-segment code nixie tube can be selected as the leakage display unit.
Specifically, the protection unit includes at least one of an overvoltage protection unit 40, an undervoltage protection unit 50, an overcurrent protection unit 60, and a lightning stroke protection unit 70. Therefore, by arranging various types of protection units, short-circuit protection, undervoltage protection, leakage protection, aging wire protection, overload protection and fault alarm can be realized respectively.
The overvoltage protection unit 40 can be implemented by using an overvoltage protection circuit, and includes a first overvoltage protection unit 40 and a second overvoltage protection unit 40, wherein the first overvoltage protection unit 40 is electrically connected with the main control unit 10 of the electric shock prevention device; the second overvoltage protection unit 40 is electrically connected with the main control unit 10 of the electric shock prevention device, and the first overvoltage protection unit 40 is electrically connected with the second overvoltage protection unit 40. Like this, through setting up double overvoltage crowbar, realize the duplicate protection of circuit, improve the overvoltage protection effect.
The first overvoltage protection unit 40 includes a first zener diode, a first overvoltage protection resistor, a second overvoltage protection resistor, a first overvoltage protection capacitor, and a first triode; the cathode of the first voltage-stabilizing diode is electrically connected with the second overvoltage protection unit 40, and the anode of the first voltage-stabilizing diode is grounded after passing through the second overvoltage protection resistor and the first overvoltage protection resistor in sequence; the two ends of the first overvoltage protection capacitor are connected with the two ends of the first overvoltage protection resistor in parallel, the base of the first triode is electrically connected with the serially connected node of the second overvoltage protection resistor and the first overvoltage protection resistor, the collector of the first triode is electrically connected with the main control unit 10, and the emitter of the first triode is grounded.
The second overvoltage protection unit 40 includes a second zener diode, a third overvoltage protection resistor, a fourth overvoltage protection resistor, and a second triode; the base electrode of the first triode is electrically connected with the cathode electrode of the second voltage-stabilizing diode, and the collector electrode of the second triode is used as the voltage input end of the second overvoltage protection unit 40; the emitting electrode of the second triode is electrically connected with the main control unit 10, the anode of the second voltage stabilizing diode is grounded, two ends of the third overvoltage protection resistor are respectively and electrically connected with the base electrode and the collector electrode of the first triode, and two ends of the fourth overvoltage protection resistor are respectively and electrically connected with the base electrode and the emitting electrode of the second triode.
Specifically, the undervoltage protection unit 50 may be implemented by an undervoltage protection circuit, which includes a first undervoltage protection resistor, a second undervoltage protection resistor, a third undervoltage protection resistor, a first voltage regulator tube, and a first diode; one end of the first undervoltage protection resistor is connected with a power supply of a secondary side circuit, and the other end of the first undervoltage protection resistor is respectively connected with one end of the second undervoltage protection resistor and the negative electrode end of the first voltage-regulator tube; the other end of the second undervoltage protection resistor is connected with the emitter end of the first PNP type triode; one end of the third undervoltage protection resistor is connected with a power supply of the secondary side circuit, and the other end of the third undervoltage protection resistor is connected with an emitter terminal of the second PNP type triode; the collector end of the second PNP type triode is connected with the positive end of the light-emitting diode of the optocoupler, and the base end of the second PNP type triode is connected with the positive end of the first voltage-regulator tube and the base end of the first PNP type triode; the collector terminal of the first PNP type triode is connected with the control terminal of the voltage reference source through the first diode which is connected positively; the positive end of the voltage reference source and the negative end of the light-emitting diode of the optocoupler are grounded, and the negative end of the first diode leads out multi-path output.
The over-current protection unit 60 specifically includes a path switch, a current detection module, a first control module, a conduction switch, and a second control module. The path switch and the current detection module are located in a loop formed by the working circuit and the input port, the current detection module is used for detecting the current in the loop and sending a first control signal to the first control module when detecting that the current is larger than the preset current value, the first control module controls the conducting switch to be switched off after receiving the first control signal, and the second control module responds to the switching-off state of the conducting switch to control the path switch to be switched off, so that the loop of the working circuit and the input port is switched off. When the current detection module detects that the loop current is smaller than a preset current value, a second control signal is sent to the first control module, the first control module controls the conduction switch to be conducted after receiving the second control signal, and the second control module responds to the conduction state of the conduction switch to control the conduction of the path switch, so that loops of the working circuit and the input port are conducted.
The lightning protection unit 70 specifically includes a first high-power resistor, a second high-power resistor, a first zener diode, a second zener diode, a third zener diode, a fourth zener diode, a first bidirectional TVS and a second bidirectional TVS, wherein one end of the first high-power resistor is connected to the input terminal of the single-chip lightning protection circuit, and the other end of the first high-power resistor is connected to the cathode of the first zener diode, the anode of the second zener diode, one end of the first bidirectional TVS and the input terminal of the logic circuit; the logic circuit is a circuit to be subjected to lightning stroke protection, and integrates the circuit to be subjected to lightning stroke protection and other circuits of the invention; one end of the second high-power resistor is connected with the output end of the single-chip lightning protection circuit, and the other end of the second high-power resistor is connected with the cathode of the third Zener diode, the anode of the fourth Zener diode, one end of the second bidirectional TVS transistor and the output end of the logic circuit; the other end of the first bidirectional TVS tube and the other end of the second bidirectional TVS tube are grounded GND; the cathode of the second Zener diode and the cathode of the fourth Zener diode are connected with a first power end of the logic circuit; the anode of the first Zener diode and the anode of the third Zener diode are connected with a second power supply end of the logic circuit. The first power supply end of the logic circuit is connected with a high level according to the requirement of the logic circuit, such as a positive direct current source, the second power supply end of the logic circuit is floating or connected with an alternating current ground, and the alternating current ground can be any direct current port. When the lightning surge occurs, the first high-power resistor bears high voltage, then the first bidirectional TVS tube changes the impedance value between two ends from high impedance to low impedance at a higher speed so as to absorb an instant large current, and the voltage between two ends of the first bidirectional TVS tube is clamped on a preset value, so that the following circuit elements are protected from being impacted by transient high-voltage spike pulse. Regardless of whether the lightning surge is a positive pulse or a negative pulse, the discharge can be performed via the bidirectional TVS tube.
The master control unit is a single chip microcomputer or an integrated circuit chip. And set up the shell body into insulating housing, insulating housing includes but insulating base and the insulating cover plate of split connection.
In this embodiment, the apparatus provided by the present invention further comprises a control system, the control system comprising:
the current absorption module is used for shielding leakage current and absorbing discrete current generated when the electric appliance is immersed in water when the leakage current is not higher than a threshold value;
the circuit insulation value acquisition module is used for acquiring a circuit insulation resistance value and sending a starting instruction to the current absorption module when the circuit insulation resistance value is lower than a preset resistance value;
the lightning intensity acquisition module is used for acquiring the environmental lightning intensity and sending a starting instruction to the current absorption module when the environmental lightning intensity is higher than a preset value;
and the fault detection module is used for automatically detecting the operation of the circuit when the power-on device is started, and if a fault occurs, a flashing instruction is sent to the indicating lamp, and an automatic closing instruction is sent after the fault is eliminated.
In the above embodiment, the electric shock protection device provided by the invention does not cut off the power supply when detecting the occurrence of the electric leakage condition within the safe electric leakage range, displays the electric leakage information and gives an early warning through the electric leakage display unit, and cuts off the circuit when exceeding the safe electric leakage range. The leakage current can be shielded, the water immersion can prevent electric shock, and the water carrying work can be realized; the fire is prevented, and the fire caused by circuit aging is prevented; lightning protection and radiation protection, and is suitable for various places; the device can detect, eliminate and ensure the electricity safety of dangerous electricity utilization conditions, fundamentally stop electricity utilization accidents, break through and make up the technical defects of post protection in the prior art, and realize pre-protection. The technical problems that in the prior art, the line is easy to have electric leakage and electric shock risks when being soaked in water, thunder or aging, and the safety performance is poor are solved.
In the present specification, each embodiment of the method is described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. Reference is made to the description of the method embodiments.
It is noted that while the operations of the methods of the present invention are depicted in the drawings in a particular order, this is not a requirement or suggestion that the operations must be performed in this particular order or that all of the illustrated operations must be performed to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions.
Although the present application provides method steps as in embodiments or flowcharts, additional or fewer steps may be included based on conventional or non-inventive approaches. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. When an apparatus or client product in practice executes, it may execute sequentially or in parallel (e.g., in a parallel processor or multithreaded processing environment, or even in a distributed data processing environment) according to the embodiments or methods shown in the figures. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the presence of additional identical or equivalent elements in a process, method, article, or apparatus that comprises the recited elements is not excluded.
The units, devices, modules, etc. set forth in the above embodiments may be implemented by a computer chip or an entity, or by a product with certain functions. For convenience of description, the above devices are described as being divided into various modules by functions, and are described separately. Of course, in implementing the present application, the functions of each module may be implemented in one or more software and/or hardware, or a module implementing the same function may be implemented by a combination of a plurality of sub-modules or sub-units, and the like. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Those skilled in the art will also appreciate that, in addition to implementing the controller as pure computer readable program code, the same functionality can be implemented by logically programming method steps such that the controller is in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Such a controller may therefore be considered as a hardware component, and the means included therein for performing the various functions may also be considered as a structure within the hardware component. Or even means for performing the functions may be regarded as being both a software module for performing the method and a structure within a hardware component.
The application may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, classes, etc. that perform particular tasks or implement particular abstract data types. The application may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
From the above description of the embodiments, it is clear to those skilled in the art that the present application can be implemented by software plus necessary general hardware platform. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, or the like, and includes several instructions for enabling a computer device (which may be a personal computer, a mobile terminal, a server, or a network device) to execute the method according to the embodiments or some parts of the embodiments of the present application.
The embodiments in the present specification are described in a progressive manner, and the same or similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. The application is operational with numerous general purpose or special purpose computing system environments or configurations. For example: personal computers, server computers, hand-held or portable devices, tablet-type devices, multiprocessor systems, microprocessor-based systems, set top boxes, programmable electronic devices, network PCs, minicomputers, mainframe computers, distributed computing environments that include any of the above systems or devices, and the like.
The above-mentioned embodiments are further described in detail for the purpose of illustrating the invention, and it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. An electric shock protection device, comprising:
the testing device comprises an outer shell, a testing button and a switch button, wherein the outer shell is provided with the testing button and the switch button;
an electric field shielding unit (30) which makes a spherical point position of the outer conductor 0;
the leakage current collection unit (20) and the electric field absorption shielding unit are both arranged on the circuit board, and the leakage current collection unit (20) is used for shielding leakage current and absorbing discrete current generated when the electric appliance is immersed in water;
and the protection unit is used for triggering the electric field shielding unit (30) and the electric leakage detection unit when an abnormal working condition is detected.
2. The electric shock protection device of claim 1, wherein the protection unit comprises at least one of an overvoltage protection unit (40), an undervoltage protection unit (50), an overcurrent protection unit (60), a lightning strike protection unit (70).
3. Electric shock protection device according to claim 2, characterized in that the overvoltage protection unit (40) comprises:
a first overvoltage protection unit (40), the first overvoltage protection unit (40) being electrically connected to a main control unit (10) of the electric shock protection device;
a second overvoltage protection unit (40), the second overvoltage protection unit (40) being electrically connected to the main control unit (10) of the electric shock protection device;
the first overvoltage protection unit (40) and the second overvoltage protection unit (40) are electrically connected.
4. The electric shock preventing apparatus according to claim 3, wherein the first overvoltage protection unit (40) comprises a first zener diode, a first overvoltage protection resistor, a second overvoltage protection resistor, a first overvoltage protection capacitor, and a first triode;
the cathode of the first voltage stabilizing diode is electrically connected with the second overvoltage protection unit (40), and the anode of the first voltage stabilizing diode is grounded after passing through the second overvoltage protection resistor and the first overvoltage protection resistor in sequence;
the two ends of the first overvoltage protection capacitor are connected with the two ends of the first overvoltage protection resistor in parallel, the base of the first triode is electrically connected with the serially connected node of the second overvoltage protection resistor and the first overvoltage protection resistor, the collector of the first triode is electrically connected with the main control unit (10), and the emitter of the first triode is grounded.
5. The electric shock preventing apparatus according to claim 4, wherein the second overvoltage protection unit (40) comprises a second zener diode, a third overvoltage protection resistor, a fourth overvoltage protection resistor, and a second transistor;
the base electrode of the first triode is electrically connected with the cathode electrode of the second voltage-stabilizing diode, and the collector electrode of the second triode is used as the voltage input end of a second overvoltage protection unit (40);
the emitting electrode of the second triode is electrically connected with the main control unit (10), the anode of the second voltage stabilizing diode is grounded, two ends of the third overvoltage protection resistor are respectively and electrically connected with the base electrode and the collector electrode of the first triode, and two ends of the fourth overvoltage protection resistor are respectively and electrically connected with the base electrode and the emitting electrode of the second triode.
6. The device according to claim 2, characterized in that said undervoltage protection unit (50) comprises:
the under-voltage protection circuit comprises a first under-voltage protection resistor, a second under-voltage protection resistor, a third under-voltage protection resistor, a first voltage regulator tube and a first diode;
one end of the first undervoltage protection resistor is connected with a power supply of a secondary side circuit, and the other end of the first undervoltage protection resistor is respectively connected with one end of the second undervoltage protection resistor and the negative electrode end of the first voltage-regulator tube;
the other end of the second undervoltage protection resistor is connected with the emitter end of the first PNP type triode;
one end of the third undervoltage protection resistor is connected with a power supply of the secondary side circuit, and the other end of the third undervoltage protection resistor is connected with an emitter terminal of the second PNP type triode;
the collector end of the second PNP type triode is connected with the positive end of the light-emitting diode of the optocoupler, and the base end of the second PNP type triode is connected with the positive end of the first voltage-regulator tube and the base end of the first PNP type triode;
the collector terminal of the first PNP type triode is connected with the control terminal of the voltage reference source through the first diode which is connected positively; the positive end of the voltage reference source and the negative end of the light-emitting diode of the optocoupler are grounded, and the negative end of the first diode leads out multi-path output.
7. The electric shock protection device of claim 2, wherein the master control unit is a single chip or an integrated circuit chip.
8. The device of claim 1, wherein the outer housing is an insulating housing.
9. The device of claim 8, wherein the insulative housing comprises an insulative base and an insulative cover that are detachably connected.
10. The device of claim 1, further comprising a control system, the control system comprising:
the current absorption module is used for shielding leakage current and absorbing discrete current generated when the electric appliance is immersed in water when the leakage current is not higher than a threshold value;
the circuit insulation value acquisition module is used for acquiring a circuit insulation resistance value and sending a starting instruction to the current absorption module when the circuit insulation resistance value is lower than a preset resistance value;
the lightning intensity acquisition module is used for acquiring the environmental lightning intensity and sending a starting instruction to the current absorption module when the environmental lightning intensity is higher than a preset value;
and the fault detection module is used for automatically detecting the operation of the circuit when the power-on device is started, and if a fault occurs, a flashing instruction is sent to the indicating lamp, and an automatic closing instruction is sent after the fault is eliminated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011194274.0A CN112242690A (en) | 2020-10-30 | 2020-10-30 | Electric shock prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011194274.0A CN112242690A (en) | 2020-10-30 | 2020-10-30 | Electric shock prevention device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112242690A true CN112242690A (en) | 2021-01-19 |
Family
ID=74170361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011194274.0A Pending CN112242690A (en) | 2020-10-30 | 2020-10-30 | Electric shock prevention device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112242690A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100711835B1 (en) * | 2006-09-04 | 2007-05-02 | 주식회사 삼광산전 | Electric leakage preuention which using inundation of street light |
| CN204858520U (en) * | 2015-08-18 | 2015-12-09 | 深圳市正远科技有限公司 | Undervoltage protection circuit is crossed to multiplexed output |
| CN205158838U (en) * | 2015-12-09 | 2016-04-13 | 四川新力光源股份有限公司 | Novel protection against electric shock lamp house |
| CN109245041A (en) * | 2018-10-26 | 2019-01-18 | 兖矿东华重工有限公司 | A kind of earth leakage protective device |
| CN209419211U (en) * | 2018-09-30 | 2019-09-20 | 惠州三华工业有限公司 | Dual overvoltage crowbar and overvoltage protective system |
| CN111628484A (en) * | 2020-06-04 | 2020-09-04 | 王忠辉 | Safe power utilization controller and circuit thereof |
-
2020
- 2020-10-30 CN CN202011194274.0A patent/CN112242690A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100711835B1 (en) * | 2006-09-04 | 2007-05-02 | 주식회사 삼광산전 | Electric leakage preuention which using inundation of street light |
| CN204858520U (en) * | 2015-08-18 | 2015-12-09 | 深圳市正远科技有限公司 | Undervoltage protection circuit is crossed to multiplexed output |
| CN205158838U (en) * | 2015-12-09 | 2016-04-13 | 四川新力光源股份有限公司 | Novel protection against electric shock lamp house |
| CN209419211U (en) * | 2018-09-30 | 2019-09-20 | 惠州三华工业有限公司 | Dual overvoltage crowbar and overvoltage protective system |
| CN109245041A (en) * | 2018-10-26 | 2019-01-18 | 兖矿东华重工有限公司 | A kind of earth leakage protective device |
| CN111628484A (en) * | 2020-06-04 | 2020-09-04 | 王忠辉 | Safe power utilization controller and circuit thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10627454B2 (en) | Grounding wire detection circuit | |
| CN202019191U (en) | Electric arc fault circuit breaker | |
| CN101877474A (en) | Intelligent arc-fault circuit interrupter | |
| CN106655075A (en) | Electric equipment arc fault protection device and electric equipment control system | |
| CN203674687U (en) | Intelligent residual-current circuit breaker | |
| CN103414155A (en) | Neutral point installation electronic type rapid harmonic-vibration eliminating device | |
| CN108418173A (en) | A kind of arc-fault circuit interrupter | |
| CN112242690A (en) | Electric shock prevention device | |
| CN208539547U (en) | A kind of smart circuit monitoring and protecting device | |
| CN202633929U (en) | Surge protection device | |
| CN216699500U (en) | Intelligent safety power consumption protection device | |
| CN203180504U (en) | Switch cabinet protecting device | |
| CN206259699U (en) | Power surge protector spontaneous combustion protection device | |
| Jingjing et al. | Design of test system for arc fault protection switch | |
| CN107994545B (en) | A kind of the protection circuit and electric system of blower | |
| CN202495734U (en) | Overcurrent protection device for distribution box | |
| CN207866950U (en) | A kind of portable cable fault positioning power supply | |
| CN201937242U (en) | Monitoring device of surge protector | |
| CN205882671U (en) | Power input excessive pressure and undervoltage protection circuit | |
| CN205104995U (en) | Power surge protector's control and high -temperature warning system | |
| CN214795612U (en) | Intelligent power consumption safety prevention and control management system | |
| CN203553899U (en) | Neutral point-mounted electronic-type fast resonance elimination device | |
| CN210898501U (en) | Current-limiting type electrical fireproof short circuit protector | |
| CN202930932U (en) | Novel lightning protection apparatus | |
| CN208571597U (en) | Onboard equipotential is exempted to be grounded surge protector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210119 |