CN219843422U - Leakage protection control device - Google Patents
Leakage protection control device Download PDFInfo
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- CN219843422U CN219843422U CN202320759259.9U CN202320759259U CN219843422U CN 219843422 U CN219843422 U CN 219843422U CN 202320759259 U CN202320759259 U CN 202320759259U CN 219843422 U CN219843422 U CN 219843422U
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- 239000003990 capacitor Substances 0.000 claims abstract description 50
- 239000002184 metal Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 10
- 238000007599 discharging Methods 0.000 description 8
- 238000004146 energy storage Methods 0.000 description 8
- 230000007935 neutral effect Effects 0.000 description 6
- 230000007257 malfunction Effects 0.000 description 4
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Abstract
The utility model relates to a leakage protection control device, which comprises a zero line port, a ground line port, a rectifying circuit, a choke circuit, a conducting circuit and a control signal output end. The zero line port is electrically connected with one end of the capacitor A through the resistor A and the rectifier diode; the ground wire port is electrically connected with the other end of the capacitor A through a rectifier diode; a resistor B is arranged and connected at two ends of the capacitor A in parallel. The positive electrode of the output end of the rectifying circuit is electrically connected with the power input end of the control tube; one end of the trigger tube is electrically connected with the positive electrode of the output end of the rectifying circuit, and the other end of the trigger tube is electrically connected with the control end of the control tube; the power input end and the power output end of the control tube are connected in series between the positive pole and the negative pole of the rectifying circuit, and the control signal output end is arranged in the series circuit. The utility model has simple circuit, good safety protection effect and more stable performance, and can be widely applied to household appliances.
Description
Technical Field
The utility model relates to the technical field of leakage protection control of household appliances, in particular to a leakage protection control device.
Background
At present, in the current leakage protection switch on the market, the current unbalance between the live wire and the zero wire is usually set, and after reaching a certain range, for example: the leakage current reaches more than 20mA, a control signal is output to control the circuit breaker to break the input power supply; when the external ground wire is broken, the live wire touches the ground wire of the household electrical appliance, and as no loop is formed, the leakage protection switch is not powered off in the use process, so personnel are easy to get an electric shock. The anti-leakage protector disclosed in the document CN101257202A is complex in circuit, is greatly influenced by the induction voltage of the fire wire of the household appliance, and is easy to malfunction. In the household electrical appliance described in the document CN112833616a, the ground wire port is affected by the live wire induced voltage, so that malfunction is likely to occur.
Disclosure of Invention
The first technical problem to be solved by the utility model is: how to avoid the earth wire port of the leakage protection device, the leakage protection device is easy to malfunction due to the influence of induced voltage on the household appliance, and the household appliance is inconvenient to use. In order to solve the technical problems, the utility model provides a leakage protection control device, wherein a rectifying circuit is provided with a resistor A; the output end of the rectifying circuit is provided with a capacitor A and a resistor B, the capacitor A stores energy of electric energy output by the rectifying circuit, and the resistor B discharges the electric energy output by the rectifying circuit to release energy, so that the discharging speed is higher than the energy storage speed of induced voltage and the voltage of the conduction of the trigger tube cannot be reached; only when the live wire touches the ground wire port of the household appliance or the metal shell, the discharging speed of the resistor B is smaller than the energy storage speed of the capacitor A, the voltage at the two ends of the capacitor A is continuously increased at the moment, the voltage triggered by the trigger tube is finally reached, the control tube is controlled to be conducted, the control signal output end outputs a control signal, and the input power supply of the household appliance is disconnected.
The second technical problem to be solved by the utility model is: how to realize the household appliance without the ground wire, the metal shell connecting end of the household appliance is contacted with the live wire port or the zero wire port is required to disconnect the input power supply, and meanwhile, the influence of the induced voltage on the metal shell is avoided, so that the circuit breaker is easy to malfunction, and the household appliance is inconvenient to use. In order to solve the technical problems, one end of the input end of the rectifying circuit is electrically connected with the zero line port through a resistor A, and is electrically connected with the fire wire port through a resistor C, and the output end of the rectifying circuit is provided with a capacitor A and a resistor B; the capacitor A stores energy of induced voltage at the connecting end of the metal shell of the household appliance, and the resistor B discharges energy of the energy stored by the capacitor A to enable the discharging speed of the capacitor A to be larger than the energy storage speed of the induced voltage, so that the capacitor A cannot reach the triggering voltage of the triggering tube; only when the live wire port or the zero wire port touches the metal shell connecting end of the household appliance, the discharging speed of the resistor B is smaller than the energy storage speed of the capacitor A, the voltage at the two ends of the capacitor A is continuously increased at the moment, finally, the triggering voltage of the triggering tube is reached, the control tube is conducted, the control signal output end outputs a control signal, and the input power supply of the household appliance is disconnected.
The utility model relates to a leakage protection control device which comprises a zero line port, a ground line port, a rectifying circuit, a resistor A, a capacitor A, a resistor B, a trigger tube, a control tube and a control signal output end. One end of the input end of the rectifying circuit is electrically connected with the zero line port, and the other end of the input end of the rectifying circuit is electrically connected with the ground line port; the resistor A is connected in series with the input end or the output end of the rectifying circuit.
The output end of the rectifying circuit is connected with a capacitor A and a resistor B in parallel; the control tube is connected in series between the positive pole and the negative pole of the rectifying circuit output end through the choke of the capacitor A and the resistor B, and the control signal output end is arranged in the series circuit.
One end of the trigger tube is electrically connected with one end of the output end of the rectifying circuit, and the other end of the trigger tube is electrically connected with the control end of the control tube.
The rectifying circuit is a bridge rectifying circuit.
A fire wire port is arranged; one end of the power input end of the rectifying circuit is electrically connected with the live wire port through a resistor C and the zero wire port through a resistor A.
The fire wire port and the resistor D are arranged; one end of the power input end of the rectifying circuit is connected with a resistor D, and the other end of the resistor D is electrically connected with the live wire port through a resistor C and the zero wire port through a resistor A.
The resistance of the resistor C is set to be 1.4 times or more of the resistance of the resistor A; the resistor C, the resistor A and the rectifying circuit form an anti-interference circuit, so that the influence of the induced voltage on the live wire port of the mains voltage on the ground wire port can be reduced, and the working stability of the circuit is improved; and meanwhile, when the ground wire port contacts the zero wire port, the control signal output end does not output a control signal, and when the ground wire port contacts the fire wire port, the control signal output end outputs the control signal.
The leakage protection control device comprises a zero line port, a fire wire port, a metal shell connecting end, a resistor A, a resistor C, a rectifying circuit, a capacitor A, a resistor B, a trigger tube, a control tube and a control signal output end.
One end of the input end of the rectifying circuit is electrically connected with the zero line port through a resistor A and is electrically connected with the fire wire port through a resistor C; the other end of the input end of the rectifying circuit is electrically connected with the connecting end of the metal shell; the output end of the rectifying circuit is connected with a capacitor A and a resistor B in parallel; the control tube is connected in series between the positive electrode and the negative electrode of the rectifying circuit through a capacitor A and a resistor B, and a control signal output end is arranged in the series circuit; one end of the trigger tube is electrically connected with one end of the output end of the rectifying circuit, and the other end of the trigger tube is electrically connected with the control end of the control tube.
The power supply is provided with a resistor D, one end of the power supply input end of the rectifying circuit is electrically connected with one end of the resistor D, the other end of the resistor D is electrically connected with the live wire port through a resistor C respectively, and the other end of the resistor D is electrically connected with the zero wire port through a resistor A.
The utility model has simple control circuit and good control effect, and can effectively reduce the production cost.
The technical scheme shows that the leakage protection control device comprises a zero line port, a ground line port, a rectifying circuit, a choke circuit, a conducting circuit and a control signal output end. The zero line port is electrically connected with one end of the capacitor A through the resistor A and the rectifier diode; the ground wire port is electrically connected with the other end of the capacitor A through a rectifier diode; a resistor B is arranged and connected at two ends of the capacitor A in parallel. The positive electrode of the output end of the rectifying circuit is electrically connected with the power input end of the control tube; one end of the trigger tube is electrically connected with the positive electrode of the output end of the rectifying circuit, and the other end of the trigger tube is electrically connected with the control end of the control tube; the power input end and the power output end of the control tube are connected in series between the positive pole and the negative pole of the rectifying circuit, and the control signal output end is arranged in the series circuit. The utility model has simple circuit, good safety protection effect and more stable performance, and can be widely applied to household appliances.
Drawings
FIG. 1 is a workflow control diagram of the present utility model.
Fig. 2 is a schematic diagram of the circuit operation principle structure of the present utility model.
Fig. 3 is a schematic structural diagram of the bridge rectifier circuit according to the present utility model.
Fig. 4 is a schematic structural diagram of the working principle of the utility model with a fire wire port.
Fig. 5 is a schematic structural diagram of the working principle of the resistor D provided by the utility model.
Fig. 6 is a schematic structural diagram of the working principle of the bridge rectifier circuit with the fire wire port.
Fig. 7 is a schematic diagram of the working principle of the bridge rectifier circuit with the fire wire port and the resistor D.
FIG. 8 is a flow chart of the operation of the voltage divider circuit according to the present utility model.
Fig. 9 is a schematic structural diagram of the working principle of the circuit without the grounding port.
Fig. 10 is a schematic structural diagram of the working principle of the utility model without a grounding port provided with a resistor D.
FIG. 11 is a flow control diagram of a balancing circuit provided with the present utility model.
Detailed Description
The following describes the technical scheme in the embodiment of the present utility model with reference to the drawings in the present utility model:
as shown in fig. 1 and 2, the leakage protection control device includes a neutral line port 11, a ground line port 12, a rectifier circuit 22, a resistor a21, a capacitor a231, a resistor B232, a trigger tube 241, a control tube 242, and a control signal output terminal 25. In the embodiment of the utility model, the rectifier diode 221 forms a rectifier circuit 22, the resistor A21 and the capacitor A231 form a choke circuit 23, and the trigger tube 241 and the control tube 242 form a conduction circuit 24.
One end of the input end of the rectifying circuit 22 is electrically connected with the zero line port 11, and the other end of the input end of the rectifying circuit 22 is electrically connected with the ground line port 12; the resistor a21 is connected in series to the input terminal, or the output terminal, of the rectifying circuit 22. In this embodiment, the resistor a21 is connected in series between one end of the input end of the rectifying circuit 22 and the zero line port 11. At this time, the resistor a21 is used for current limiting, and when the ground port 12 touches the fire wire port 111, the input current thereof can be controlled to be 1mA or less.
The output end of the rectifying circuit 22 is connected with a capacitor A231 and a resistor B232 in parallel; the capacitor A231 stores energy of the electric energy at the output end of the rectifying circuit 22, and the resistor B232 discharges the electric energy at the output end of the rectifying circuit 22. The control tube 242 is connected in series between the positive electrode and the negative electrode of the output end of the rectifying circuit 22 through the capacitor A231 and the resistor B232, and the control signal output end 25 is arranged in the series circuit.
One end of the trigger tube 241 is electrically connected to one end of the output end of the rectifying circuit 22, and the other end of the trigger tube 241 is electrically connected to the control end of the control tube 242. The trigger tube 241 controls the on and off of the input and output ends of the control tube 242. The control signal output terminal 25 may be set to high level control or continuous pulse output control. The zero line and the fire line of the utility model are reversely connected, when the ground line port 12 is electrified, the control signal output end 25 outputs a control signal.
As shown in fig. 3, 6, and 7, the rectifier circuit 22 may be a bridge rectifier circuit.
As shown in fig. 4 and 8, in order to further reduce the influence of the induced voltage on the circuit and improve the stability of the circuit operation, a fire wire port 111 is provided; one end of the power input end of the rectifying circuit 22 is electrically connected to the live wire port 111 through the resistor C211, and is electrically connected to the neutral wire port 11 through the resistor a 21. At this time, the resistor C211 and the resistor a21 form the voltage divider 121, and the voltage divider 121 and the rectifying circuit 22 form the anti-interference circuit, so that the reference voltage at the input end of the rectifying circuit 22 is increased to reduce the influence of the induced voltage generated by the fire wire port 111 on the ground wire port 12, thereby improving the stability of circuit operation.
As shown in fig. 5 and 7, a resistor D212 is provided to improve the stability and high voltage withstand capability of the circuit; one end of the power input end of the rectifying circuit 22 is connected with a resistor D212, and the other end of the resistor D212 is electrically connected with the live wire port 111 through a resistor C211 and is electrically connected with the zero wire port 11 through a resistor A21. The resistance of the resistor C211 may be 1.4 times or more the resistance of the resistor a 21. At this time, the resistor D212 is a current limiting resistor.
In the circuit of the embodiment shown in fig. 2, the resistor a21 is a resistor of 1M ohm, and the capacitor a231 is a capacitor of 22 nF. The trigger tube 241 is a diac, and the control tube 242 is a thyristor.
In the circuit of the embodiment shown in fig. 7, the resistor a21 is a 100K resistor, the resistor C211, the resistor B232, and the resistor D212 are 1M ohms, and the capacitor a231 is a 22nF capacitor. The trigger tube 241 is a diac, and the control tube 242 is a thyristor. The parameters of the elements can be adjusted according to practical application on the premise of realizing the product function.
As shown in fig. 9, 10 and 11, the leakage protection control device includes a neutral port 11, a live port 111, a metal housing connection terminal 33, a resistor a21, a resistor C211, a rectifier circuit 22, a capacitor a231, a resistor B232, a trigger tube 241, a control tube 242 and a control signal output terminal 25.
One end of the input end of the rectifying circuit 22 is electrically connected with the zero line port 11 through a resistor A21 and is electrically connected with the fire line port 111 through a resistor C211; the other end of the input end of the rectifying circuit 22 is electrically connected with a metal shell connecting end 33 of the household appliance 28; the output end of the rectifying circuit 22 is connected with a capacitor A231 and a resistor B232 in parallel; the control tube 242 is connected in series between the positive pole and the negative pole of the rectifying circuit 22 through the choke of the capacitor A231 and the resistor B232, and a control signal output end 25 is arranged in the series circuit; one end of the trigger tube 241 is electrically connected to one end of the output end of the rectifying circuit 22, and the other end of the trigger tube 241 is electrically connected to the control end of the control tube 242. At this time, the resistor C211 and the resistor a21 form the voltage divider 121, and the voltage divider 121 and the rectifying circuit 22 form the anti-interference circuit, so that the reference voltage at the input end of the rectifying circuit 22 is increased to reduce the influence of the induced voltage generated by the fire wire port 111 on the ground wire port 12, thereby improving the stability of circuit operation.
A resistor D212 is provided, one end of the power input end of the rectifying circuit 22 is electrically connected with one end of the resistor D212, the other end of the resistor D212 is electrically connected with the live wire port 111 through a resistor C211, and is electrically connected with the zero wire port 11 through a resistor a 21.
The resistances of the resistor a21 and the resistor C211 are the same, and the resistor a21 and the resistor C211 are electrically connected with the live wire port 111 and the zero wire port 11 to form a voltage equalizing circuit 122; the voltage equalizing circuit 122 is configured such that, whether the live wire port 111 or the neutral wire port 11 touches the metal shell connection terminal 33, the rectifying circuit 22 outputs a control voltage, and the control voltage is supplied to the trigger tube 241 via the choke circuit 23 to control the conduction of the control tube 242, so that the control signal output terminal 25 outputs a control signal.
As shown in fig. 1 and 2, the working process 1:
1. when the ground port 12 does not touch the live port 111, the ground port 12 has no leakage voltage.
2. The output terminal of the rectifying circuit 22 is not supplied with the leakage voltage.
3. The on circuit 24 does not work, the control signal output end 25 does not output a control signal, the main control circuit 26 does not receive the control signal, the cut-off switch 27 is in a connected state, and the household appliance 28 works normally.
4. When the ground port 12 has an induced voltage at the live port 111, an induced voltage is input at both ends of the input terminal of the rectifying circuit 22.
5. And after being limited by the resistor A21, the current is output through the output end of the rectifying circuit 22.
6. Capacitor a231 stores energy in the output dc power, and resistor B232 discharges the output dc power.
7. At this time, the discharging speed of the resistor B232 is faster than the energy storage speed of the capacitor a231, the voltage of the output end of the rectifying circuit 22 is lower than the trigger voltage of the trigger tube 241, the control tube 242 does not work, the control signal output end 25 does not output a control signal, the main control circuit 26 cannot receive the control signal, the cut-off switch 27 is in a connected state, and the household appliance 28 works normally.
8. When the input ground port 12 of the rectifying circuit 22 touches the fire wire port 111, the ground port 12 is charged.
9. And after being limited by the resistor A21, the current is output through the output end of the rectifying circuit 22.
10. Capacitor a231 stores energy in the output dc power, and resistor B232 discharges the output dc power.
11. At this time, the discharging speed of the resistor B232 is lower than the energy storage speed of the capacitor a231, the output voltage of the rectifying circuit 22 is continuously increased, and when the output voltage is higher than the trigger voltage of the trigger tube 241, the control tube 242 works, the control signal output end 25 outputs a control signal to the main control circuit 26, and the main control circuit 26 controls to send out an electric leakage warning, or opens the circuit breaker 27 to disconnect the input power of the household appliance 28.
As shown in fig. 9 and 11, the operation 2:
1. when the metal shell connection 33 to which the input of the rectifying circuit 22 is connected has a live wire port 111 or an induced voltage of the neutral wire port 11.
2. The electric energy output by the output end of the rectifying circuit 22 is stored by the capacitor A231, discharged by the resistor B232 for releasing energy, and the resistor D212 limits the current of the rectifying circuit 22.
3. At this time, the discharging speed of the resistor B232 is greater than the energy storage speed of the capacitor a231, the trigger tube 241 does not work, the power input end and the output end of the control tube 242 are not conducted, the control signal output end 25 is not output with a control signal, and the household appliance 28 works normally.
4. When the metal housing connection 33 to which the input of the rectifier circuit 22 is connected touches the live port 111 or the neutral port 11.
5. The electric energy output by the output end of the rectifying circuit 22 is stored by the capacitor A231, discharged by the resistor B232 for releasing energy, and the resistor D212 limits the current of the rectifying circuit 22.
6. At this time, the discharging speed of the resistor B232 is smaller than the energy storage speed of the capacitor A231, the voltage at two ends of the capacitor A231 is continuously increased, and finally the triggering voltage of the triggering tube 241 is reached, and the control tube 242 is controlled to be conducted; the control signal output end 25 outputs a control signal to the main control circuit 26 to open the cut-off switch 27, so that the use safety of the household appliance 28 is ensured.
The foregoing has outlined a further description of the embodiments of the present utility model in order that the detailed description of the embodiments and embodiments of the present utility model may be considered as an exemplification of the principles and embodiments of the utility model, and is merely illustrative of the principles and embodiments of the present utility model. Those skilled in the art should appreciate that the conception and specific embodiment disclosed may be readily utilized as a basis for the designing of other structures for carrying out the same purposes of the present utility model.
Claims (7)
1. A leakage protection control device comprises a zero line port (11), a ground line port (12), a rectifying circuit (22), a resistor A (21), a capacitor A (231), a resistor B (232), a trigger tube (241), a control tube (242) and a control signal output end (25); the method is characterized in that: one end of the input end of the rectifying circuit (22) is electrically connected with the zero line port (11), and the other end of the input end of the rectifying circuit (22) is electrically connected with the ground line port (12); the resistor A (21) is connected in series with the input end or the output end of the rectifying circuit (22); the output end of the rectifying circuit (22) is connected with a capacitor A (231) and a resistor B (232) in parallel; the control tube (242) is connected in series between the positive electrode and the negative electrode of the output end of the rectifying circuit (22) through the capacitor A (231) and the resistor B (232), and a control signal output end (25) is arranged in the series circuit; one end of the trigger tube (241) is electrically connected with one end of the output end of the rectifying circuit (22), and the other end of the trigger tube (241) is electrically connected with the control end of the control tube (242).
2. The leakage protection control device according to claim 1, wherein: the rectifier circuit (22) is a bridge rectifier circuit.
3. The leakage protection control device according to claim 1 or 2, characterized in that: is provided with a fire wire port (111); one end of the power input end of the rectifying circuit (22) is electrically connected with the live wire port (111) through the resistor C (211) and is electrically connected with the zero wire port (11) through the resistor A (21).
4. The leakage protection control device according to claim 1 or 2, characterized in that: the electric power circuit is provided with a fire wire port (111) and a resistor D (212); one end of a power input end of the rectifying circuit (22) is connected with a resistor D (212), the other end of the resistor D (212) is electrically connected with a fire wire port (111) through a resistor C (211), and is electrically connected with a zero wire port (11) through a resistor A (21).
5. The leakage protection control device according to claim 3 or 4, characterized in that: the resistance of the resistor C (211) is 1.4 times or more the resistance of the resistor A (21).
6. The leakage protection control device comprises a zero line port (11), a fire line port (111), a metal shell connecting end (33), a resistor A (21), a resistor C (211), a rectifying circuit (22), a capacitor A (231), a resistor B (232), a trigger tube (241), a control tube (242) and a control signal output end (25); the method is characterized in that: one end of the input end of the rectifying circuit (22) is electrically connected with the zero line port (11) through a resistor A (21) and is electrically connected with the fire line port (111) through a resistor C (211); the other end of the input end of the rectifying circuit (22) is electrically connected with a metal shell connecting end (33) of the household appliance (28); the output end of the rectifying circuit (22) is connected with a capacitor A (231) and a resistor B (232) in parallel; the control tube (242) is connected in series between the positive pole and the negative pole of the rectifying circuit (22) through the capacitor A (231) and the resistor B (232), and a control signal output end (25) is arranged in the series circuit; one end of the trigger tube (241) is electrically connected with one end of the output end of the rectifying circuit (22), and the other end of the trigger tube (241) is electrically connected with the control end of the control tube (242).
7. The leakage protection control device according to claim 6, wherein: the power supply is provided with a resistor D (212), one end of a power input end of the rectifying circuit (22) is electrically connected with one end of the resistor D (212), the other end of the resistor D (212) is electrically connected with the fire wire port (111) through a resistor C (211) respectively, and is electrically connected with the zero wire port (11) through a resistor A (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320759259.9U CN219843422U (en) | 2023-04-08 | 2023-04-08 | Leakage protection control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320759259.9U CN219843422U (en) | 2023-04-08 | 2023-04-08 | Leakage protection control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219843422U true CN219843422U (en) | 2023-10-17 |
Family
ID=88303716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320759259.9U Active CN219843422U (en) | 2023-04-08 | 2023-04-08 | Leakage protection control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219843422U (en) |
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2023
- 2023-04-08 CN CN202320759259.9U patent/CN219843422U/en active Active
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