CN112886537A - Intelligent leakage human body protection safety device - Google Patents
Intelligent leakage human body protection safety device Download PDFInfo
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- CN112886537A CN112886537A CN202110323347.XA CN202110323347A CN112886537A CN 112886537 A CN112886537 A CN 112886537A CN 202110323347 A CN202110323347 A CN 202110323347A CN 112886537 A CN112886537 A CN 112886537A
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- 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
- H02H3/34—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 of a three-phase system
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- 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
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- 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
- G01R31/55—Testing for incorrect line connections
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
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- 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
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses an intelligent leakage human body protection safety device which comprises a leakage protection circuit, a direct current stabilized power supply circuit, a detection alarm circuit and an induction detection electrode, wherein the leakage protection circuit is provided with three phase line wiring ends and a zero line wiring end, a first power supply input end of the direct current stabilized power supply circuit is connected with one phase line wiring end, a second power supply input end of the direct current stabilized power supply circuit is connected with the zero line wiring end, a positive electrode output end of the direct current stabilized power supply circuit is connected with a positive electrode input end of the detection alarm circuit, a negative electrode output end of the direct current stabilized power supply circuit is connected with a negative electrode input end of the detection alarm circuit, and the induction detection electrode is connected with a signal input end of the detection alarm circuit. The circuit provided by the invention has the advantages of simple structure and low cost, can realize single-phase and three-phase universality, has the functions of protecting personal safety by electric leakage, has the function of alarming when the zero line and the live line are connected reversely, avoids safety accidents caused by the fact that the zero line and the live line are connected reversely, and greatly improves the safety performance.
Description
Technical Field
The invention relates to the technical field of electric leakage protection equipment, in particular to an intelligent electric leakage human body protection safety device.
Background
At present, the standard of a common industrial and civil low-voltage power supply in China is a three-phase four-wire or five-wire system, namely an A-phase (or live wire L1), a B-phase (or live wire L2), a C-phase (or live wire L3), a zero wire N and a protective grounding wire PE. When in wiring, the power supply can be connected with a three-phase (ABC + N + PE) electric appliance or a single-phase (a live wire L + N + PE) electric appliance through a leakage protector, a controller (a switch, a circuit breaker and the like) and a power supply wire. However, the existing earth leakage protector has the following disadvantages: 1. single-phase and three-phase universal use cannot be realized; 2. the alarm device does not have the function of alarm when the zero line and the live line are connected reversely, and cannot avoid safety accidents caused by the fact that the zero line and the live line are connected reversely; 3. the circuit structure is complicated, the cost is high, and the safety performance is still to be improved.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an intelligent human body leakage protection safety device.
In order to achieve the above object, the present invention provides an intelligent leakage human body protection safety device, which comprises a leakage protection circuit for grounding, a dc stabilized power supply circuit, a detection alarm circuit for alarming by sound when the zero line and the live line are connected reversely, and an induction detection electrode GY for detecting whether the zero line and the live line are connected reversely, wherein the leakage protection circuit has a first phase line terminal L1, a second phase line terminal L2, a third phase line terminal L3, and a zero line terminal N, a first power input end of the dc stabilized power supply circuit is connected with the first phase line terminal L1, the second phase line terminal L2, or the third phase line terminal L3, a second power input end of the dc stabilized power supply circuit is connected with the zero line N, a positive output end of the dc stabilized power supply circuit is connected with a positive input end of the detection alarm circuit, a negative output end of the dc stabilized power supply circuit is connected with a negative input end of the detection alarm circuit, the inductive detection electrode GY is connected with a signal input end of the detection alarm circuit, and an inductive coil of the inductive detection electrode GY is close to a lead of a zero line terminal N.
Preferably, in the above technical solution, the leakage protection circuit includes a resistor R1, a light emitting diode D1, a diode D1, and a diode D1, one ends of the resistor R1 and the resistor R1 are respectively connected in parallel with the first phase line terminal L1, the other end of the resistor R1 is sequentially connected in series with the light emitting diode D1 and the diode D1 and then grounded, the other end of the resistor R1 is sequentially connected in series with the light emitting diode D1 and the diode D1, one ends of the resistor R1 and the resistor R1 are respectively connected in parallel with the second phase line terminal L1, the other end of the resistor R1 is sequentially connected in series with the light emitting diode D1, the other end of resistance R4 and emitting diode D4 and diode D10 are established ties in proper order, resistance R5 and resistance R6's one end is parallelly connected with third phase line terminal L3 respectively, resistance R5's the other end and emitting diode D5 and diode D11 ground connection after establishing ties in proper order, resistance R6's the other end and emitting diode D6 and diode D12 establish ties in proper order, diode D8's negative pole, diode D10's negative pole, diode D12's negative pole and zero line terminal N's wire are connected in parallel connection respectively at the second power input of direct current regulated power supply circuit.
Preferably, in the above technical solution, the dc regulated power supply circuit includes a resistor R7, a resistor R8, a capacitor C1, a capacitor C2, a zener diode D17, and a rectifier bridge composed of a resistor R13, a resistor R14, a resistor R15, and a resistor R16, one end of the resistor R7 is connected to the first phase line terminal L1, the second phase line terminal L2, or the third phase line terminal L3, the resistor R8 and the capacitor C1 are connected in parallel between the other end of the resistor R7 and the first input end of the rectifier bridge, the positive output end of the rectifier bridge is connected to the positive input end of the detection alarm circuit, the negative output end of the rectifier bridge is connected to the negative input end of the detection alarm circuit, and the capacitor C2 and the zener diode D17 are connected in parallel between the positive output end of the rectifier bridge and the negative output end of the rectifier bridge.
Preferably, in the above technical solution, the detection alarm circuit includes a signal amplification circuit and a buzzer F, an input end of the signal amplification circuit is connected with the induction detection electrode GY, and an output end of the signal amplification circuit is connected with the buzzer F.
Preferably, in the above technical solution, the signal amplifying circuit includes a transistor Q1, a transistor Q2 and a transistor Q3, a base of the transistor Q1 is connected to the inductive detection electrode GY, an emitter of the transistor Q1 is connected to a base of the transistor Q2, an emitter of the transistor Q2 is connected to a base of the transistor Q3, an emitter of the transistor Q3 is connected to a positive output terminal of the dc voltage stabilizing power circuit, a collector of the transistor Q1 and a collector of the transistor Q2 are respectively connected to a negative output terminal of the dc voltage stabilizing power circuit, a collector of the transistor Q3 is connected to one end of the buzzer F, and the other end of the buzzer F is connected to a negative output terminal of the dc voltage stabilizing power circuit.
Compared with the prior art, the invention has the beneficial effects that:
the circuit has the advantages of simple structure, reasonable design and low cost, can realize single-phase and three-phase universality, and when a human body touches the phase line, the current of the phase line can be released to the ground through the grounding wire, so that the human body can not get an electric shock, the leakage protection function is realized, the zero-live wire connection anti-alarm function is realized, the safety accident caused by the fact that the zero-live wire is connected on the contrary is avoided, and the safety performance is greatly improved.
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 introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a circuit block diagram of an intelligent leakage human body protection safety device provided by an embodiment of the invention;
FIG. 2 is a schematic circuit diagram of an intelligent leakage human body protection safety device provided by an embodiment of the invention;
fig. 3 is a wiring diagram of the intelligent earth leakage human body protection safety device provided by the embodiment of the invention when the intelligent earth leakage human body protection safety device is connected with a load.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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.
Referring to fig. 1, an embodiment of the present invention provides an intelligent human body leakage protection safety device, which includes a ground leakage protection circuit, a dc stabilized power supply circuit, a detection alarm circuit for alarming by sound when the zero line and the live line are connected reversely, and an induction detection electrode GY for detecting whether the zero line and the live line are connected reversely, wherein the leakage protection circuit has a first phase line terminal L1, a second phase line terminal L2, a third phase line terminal L3, and a zero line terminal N, a first power input end of the dc stabilized power supply circuit is connected with the first phase line terminal L1, a second power input end of the dc stabilized power supply circuit is connected with the zero line terminal N, a positive output end of the dc stabilized power supply circuit is connected with a positive input end of the detection alarm circuit, a negative output end of the dc stabilized power supply circuit is connected with a negative input end of the detection alarm circuit, and the induction detection electrode GY is connected with a signal input end of the detection alarm circuit, and an induction coil of the induction detection electrode GY is close to a lead of the zero line terminal N.
It should be noted that, in other embodiments, the first power input terminal of the dc regulated power supply circuit may be connected to the second phase terminal L2 or the third phase terminal L3, as long as one of the phase terminals is connected, according to actual needs.
The following describes each component of the present embodiment in detail with reference to the drawings.
As shown in fig. 2, the leakage protection circuit may include a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a light emitting diode D1, a light emitting diode D2, a light emitting diode D3, a light emitting diode D4, a light emitting diode D5, a light emitting diode D6, a diode D7, a diode D8, a diode D9, a diode D10, a diode D11, and a diode D12, wherein one ends of the resistor R1 and the resistor R2 are respectively connected in parallel with the first phase line terminal L1, the other end of the resistor R1 is sequentially connected in series with the light emitting diode D1 and the diode D7 and then grounded, the other end of the resistor R2 is sequentially connected in series with the light emitting diode D2 and the diode D8, one ends of the resistor R3 and the resistor R3 are respectively connected in parallel with the second phase line terminal L3, the other end of the resistor R3 is sequentially connected in series with the light emitting diode D3 and the diode D3, one end of a resistor R5 and one end of a resistor R6 are respectively connected with a third phase line terminal L3 in parallel, the other end of the resistor R5 is sequentially connected with a light-emitting diode D5 and a diode D11 in series and then grounded, the other end of the resistor R6 is sequentially connected with the light-emitting diode D6 and the diode D12 in series, and the negative electrode of a diode D8, the negative electrode of a diode D10, the negative electrode of a diode D12 and a conducting wire of a zero line terminal N are respectively connected with a second power supply input end of the direct current stabilized power supply circuit in parallel.
As shown in fig. 2, the dc regulated power supply circuit may include a resistor R7, a resistor R8, a capacitor C1, a capacitor C2 (filter capacitor), a zener diode D17, and a rectifier bridge composed of a resistor R13, a resistor R14, a resistor R15, and a resistor R16, wherein one end of the resistor R7 is connected to the first phase terminal L1, the resistor R8 and the capacitor C1 are connected in parallel between the other end of the resistor R7 and a first input terminal of the rectifier bridge, an anode output terminal of the rectifier bridge is connected to an anode input terminal of the detection alarm circuit, a cathode output terminal of the rectifier bridge is connected to a cathode input terminal of the detection alarm circuit, and the capacitor C2 and the zener diode D17 are connected in parallel between the anode output terminal of the rectifier bridge and the cathode output terminal of the rectifier bridge. The direct current stabilized power supply circuit can convert 220V alternating current into 3V direct current.
As shown in fig. 2, the detection alarm circuit may include a signal amplification circuit and a buzzer F, wherein an input terminal of the signal amplification circuit is connected to the sensing detection electrode GY, and an output terminal of the signal amplification circuit is connected to the buzzer F. In this embodiment, preferably, the signal amplifying circuit may include a transistor Q1, a transistor Q2, and a transistor Q3, the triode Q1, the triode Q2 and the triode Q3 can form a three-level direct-coupling small-signal amplification circuit, the base of the triode Q1 is connected with the inductive detection electrode GY, the emitter of the triode Q1 is connected with the base of the triode Q2, the emitter of the triode Q2 is connected with the base of the triode Q3, the emitter of the triode Q3 is connected with the positive output end (namely the positive output end of the rectifier bridge) of the direct-current stabilized power supply circuit, the collector of the triode Q1 and the collector of the triode Q2 are respectively connected with the negative output end (namely the negative output end of the rectifier bridge) of the direct-current stabilized power supply circuit, the collector of the triode Q3 is connected with one end of the buzzer F, and the other end of the buzzer F is connected with the.
The sensing coil of the inductive detection electrode GY picks up a signal which is generally an alternating signal and can sense a weak current, and then the signal is sent to the triode Q1 to be amplified, the triode Q1 is amplified in one stage, the triode Q2 is amplified in the second stage, the triode Q2 is amplified in the third stage, and after the signal is amplified in the third stage, the buzzer is triggered to give a sound prompt.
The working principle of the invention is as follows:
the three phases of the electric appliance L1, L2, L3 and the zero line N are connected in parallel on a line (shown in figure 3) outputting to a load, when a human body touches the phase line, the current of the phase line is connected to the grounding line through a resistor, a light-emitting diode and a diode and is discharged to the ground, so that the human body does not get an electric shock. The single phase only needs to be connected with L1 and N.
The zero line and the live wire can not be reversely connected, and the leakage protection effect can not be realized if the zero line and the live wire are reversely connected, so that the detection alarm circuit can give an alarm for prompting if the zero line and the live wire are reversely connected. When the zero line and the live line are connected reversely, a magnetic field is arranged around the lead of the zero line terminal N, the induction coil of the induction detection electrode GY can induce weak current in the magnetic field, and the weak current is amplified through the three-level triode to trigger the buzzer to alarm.
After verifying, having installed the human protection safety device of intelligence electric leakage of this embodiment, when the electric leakage takes place for household electrical equipment, circuit, the human body goes to touch electric leakage circuit or electrical apparatus, can not cause the electric shock accident to the human body (other earth leakage protection ware of family can not trip), and when using on the family wall socket, kids take electric conductors such as metal bar to go to insert the live wire of socket on can not cause the human electric shock accident to the human body to take place yet.
In addition, the electric leakage of equipment can not cause the electric shock accident to the human body under humid environment, 220v bulb of three-phase motor of experimental three-phase four-wire connection is put in water, and the naked bubble of three-phase four-wire terminal is in water, and motor, bulb are whole to be worked as if, and the sensation of getting an electric shock of people's handle a little in water does not all have, and people hold the live wire in one hand and touch human body on the wall with the hand and can not feel the electric shock at all.
The intelligent leakage human body protection safety device is suitable for household appliances such as water pumps, motors, machine tools, water heaters, air conditioners and various industrial equipment, greatly improves the safety of the equipment and prevents electric shock accidents.
In conclusion, the circuit disclosed by the invention has the advantages of simple structure, reasonable design and low cost, can realize single-phase and three-phase universality, and when a human body touches the phase line, the current of the phase line can be released to the ground through the grounding wire, so that the human body can not get an electric shock, the function of protecting the personal safety by electric leakage is realized, the function of alarming when the zero-live wire is connected reversely is realized, the safety accident caused by the fact that the zero-live wire is connected reversely is avoided, and the safety performance is greatly improved.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (5)
1. The utility model provides a human protection breaker of intelligence electric leakage which characterized in that: the leakage protection circuit comprises a ground processing leakage protection circuit, a direct current stabilized power supply circuit, a detection alarm circuit and an induction detection electrode GY, wherein the detection alarm circuit is used for alarming through sound when a zero line and a live line are reversely connected, the induction detection electrode GY is used for detecting whether the zero line and the live line are reversely connected, the leakage protection circuit is provided with a first phase line terminal L1, a second phase line terminal L2, a third phase line terminal L3 and a zero line terminal N, a first power input end of the direct current stabilized power supply circuit is connected with the first phase line terminal L1, the second phase line terminal L2 or the third phase line terminal L3, a second power input end of the direct current stabilized power supply circuit is connected with the zero line terminal N, an anode output end of the direct current stabilized power supply circuit is connected with an anode input end of the detection alarm circuit, a cathode output end of the direct current stabilized power supply circuit is connected with a cathode input end of the detection alarm circuit, and, and the induction coil of the induction detection electrode GY is close to the lead of the zero line terminal N.
2. The intelligent earth leakage human body protection safety device according to claim 1, wherein: the leakage protection circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a light emitting diode D1, a light emitting diode D2, a light emitting diode D3, a light emitting diode D4, a light emitting diode D5, a light emitting diode D6, a diode D7, a diode D8, a diode D9, a diode D10, a diode D11 and a diode D12, wherein one ends of the resistor R1 and the resistor R2 are respectively connected in parallel with a first phase line terminal L1, the other end of the resistor R1 is sequentially connected in series with the light emitting diode D1 and the diode D7 and then grounded, the other end of the resistor R2 is sequentially connected in series with the light emitting diode D2 and the diode D8, one ends of the resistor R3 and the resistor R3 are respectively connected in parallel with a second phase line terminal L3, the other end of the resistor R3 and the diode D3 are sequentially connected in series with the diode D3 and the diode D3, one end of the resistor R5 and one end of the resistor R6 are connected with the third phase line terminal L3 in parallel respectively, the other end of the resistor R5 is connected with the light-emitting diode D5 and the diode D11 in series in sequence and then is grounded, the other end of the resistor R6 is connected with the light-emitting diode D6 and the diode D12 in series in sequence, and the negative pole of the diode D8, the negative pole of the diode D10, the negative pole of the diode D12 and the conducting wire of the zero line terminal N are connected with the second power supply input end of the direct current stabilized voltage power supply circuit in parallel respectively.
3. The intelligent earth leakage human body protection safety device according to claim 1, wherein: the direct-current stabilized power supply circuit comprises a resistor R7, a resistor R8, a capacitor C1, a capacitor C2, a voltage stabilizing diode D17 and a rectifier bridge consisting of a resistor R13, a resistor R14, a resistor R15 and a resistor R16, wherein one end of the resistor R7 is connected with a first phase line terminal L1, a second phase line terminal L2 or a third phase line terminal L3, the resistor R8 and the capacitor C1 are connected between the other end of the resistor R7 and a first input end of the rectifier bridge in parallel, an anode output end of the rectifier bridge is connected with an anode input end of the detection alarm circuit, a cathode output end of the rectifier bridge is connected with a cathode input end of the detection alarm circuit, and the capacitor C2 and the voltage stabilizing diode D17 are connected between the anode output end of the rectifier bridge and the cathode output end of the rectifier bridge in parallel.
4. The intelligent earth leakage human body protection safety device according to claim 1, wherein: the detection alarm circuit comprises a signal amplification circuit and a buzzer F, wherein the input end of the signal amplification circuit is connected with the inductive detection electrode GY, and the output end of the signal amplification circuit is connected with the buzzer F.
5. The intelligent earth leakage human body protection safety device according to claim 4, wherein: the signal amplification circuit comprises a triode Q1, a triode Q2 and a triode Q3, the base of the triode Q1 is connected with the inductive detection electrode GY, the base of the triode Q2 is connected with the emitter of the triode Q1, the base of the triode Q3 is connected with the emitter of the triode Q2, the anode output end of the direct-current stabilized power supply circuit is connected with the emitter of the triode Q3, the cathode output end of the direct-current stabilized power supply circuit is respectively connected with the collector of the triode Q1 and the collector of the triode Q2, the collector of the triode Q3 is connected with one end of a buzzer F, and the other end of the buzzer F is connected with the cathode output end of the direct-current stabilized power supply circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110323347.XA CN112886537A (en) | 2021-03-26 | 2021-03-26 | Intelligent leakage human body protection safety device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110323347.XA CN112886537A (en) | 2021-03-26 | 2021-03-26 | Intelligent leakage human body protection safety device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023231755A1 (en) * | 2022-06-02 | 2023-12-07 | 合肥美的暖通设备有限公司 | Detection method and apparatus for phase wire and neutral wire reverse connection, storage medium and inverter air conditioner |
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2021
- 2021-03-26 CN CN202110323347.XA patent/CN112886537A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023231755A1 (en) * | 2022-06-02 | 2023-12-07 | 合肥美的暖通设备有限公司 | Detection method and apparatus for phase wire and neutral wire reverse connection, storage medium and inverter air conditioner |
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