CN2409694Y - Protector for electric leakage electric shock, overcurrent and overvoltage - Google Patents
Protector for electric leakage electric shock, overcurrent and overvoltage Download PDFInfo
- Publication number
- CN2409694Y CN2409694Y CN 99258893 CN99258893U CN2409694Y CN 2409694 Y CN2409694 Y CN 2409694Y CN 99258893 CN99258893 CN 99258893 CN 99258893 U CN99258893 U CN 99258893U CN 2409694 Y CN2409694 Y CN 2409694Y
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- electric leakage
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- overcurrent
- protection circuit
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Abstract
The utility model relates to a protector for electric leakage electric shock, overcurrent and overvoltage. The utility model is characterized in that the input terminal of a DC power supply circuit is connected with AC power supply, and the output terminal of the DC power supply circuit is connected with an overvoltage protection circuit and an electric leakage electric shock protection circuit; the input terminal of the overvoltage protection circuit is connected with the AC power supply; the signal collecting terminal of the electric leakage electric shock protection circuit is arranged in an AC output loop; an overcurrent protection circuit is connected in series to the AC output loop; the output terminals of the overvoltage protection circuit, the overcurrent protection circuit, and the electric leakage electric shock protection circuit are respectively communicated with an output control circuit in an AC loop. When overvoltage, or overcurrent, or electric leakage electric shock occurs in one circuit, a switch in the output control circuit can be opened respectively by the overvoltage protection circuit, the overcurrent protection circuit, and the electric leakage electric shock protection circuit, switching the power supply off, so the purpose of protecting electric appliances is achieved. The utility model integrates the protection for electric leakage electric shock, overcurrent, and overvoltage, so the utility model has the advantage of high reliability. The utility model can switch the power supply off automatically in an instant.
Description
The utility model relates to a kind of household electrical appliance electric leakage electric shock, overcurrent, over-pressure safety device.
In the prior art; the protective device of household electrical appliance has two kinds on electric leakage overcurrent vreaker and leakage, breaking switch; earth leakage protective is to work as power ground; reach protection by deenergization when the people gets an electric shock, the overload overcurrent protection is to damage having only when household electrical appliance, just plays the deenergization effect when causing short circuit; therefore; can not form protection to household electrical appliance, and existing overcurrent protective device employing mechanical structure, error easily caused.In addition, people often get used to only turning off household electrical appliance with remote controller, and forget and close general supply in daily life, like this, just easily occur artificial or extraneous things such as weather causes the two-phase electric forming, thereby owing to the circuit overvoltage damages electrical equipment.
The object of the present invention is to provide a kind ofly collect electric leakage electric shock, overcurrent, overvoltage protection is the household appliance protecting device of one.
The purpose of this utility model is achieved in that a kind of electric leakage electric shock, overcurrent, over-pressure safety device, and it comprises output control circuit, DC power supply circuit, overvoltage crowbar, electric leakage electrical shock protection circuit, current foldback circuit; Described DC power supply circuit input termination AC power, its output is connected with overvoltage crowbar, electric leakage electrical shock protection circuit respectively; The overvoltage crowbar input links to each other with AC power; electric leakage electrical shock protection circuit signal collection terminal is located at and is exchanged in the output loop; current foldback circuit is serially connected with and exchanges in the output loop, and the output of its overvoltage crowbar, electric leakage electrical shock protection circuit, current foldback circuit is communicated with output control circuit in the ac circuit respectively.
Said output control circuit is made up of relay J, dropout K switch, capacitor C 1, and relay J is serially connected with in the ac circuit, and the dropout K switch is located at the input of ac circuit.Said DC power supply circuit is made up of bridge rectifier and resistance R 2, capacitor C 2 that diode D1-D4 forms, resistance R 2 be connected to the bridge rectifier output after capacitor C 2 is connected.Said overvoltage crowbar is by controllable silicon V1, V2; resistance R 3, R4, capacitor C 3, diode D1, D2 form; after controllable silicon V1, the V2 serial connection and in the output of rectification circuit; the control end of its V1, V2 is connected with ac circuit through R3, R4 respectively, and capacitor C 3 is coupled between V1, the V2 control end.Said electric leakage electrical shock protection circuit is made up of controllable silicon V3, capacitor C 4, resistance R 5, R6, coil L1, L2, L3; controllable silicon V3 is connected to the bridge rectifier output; its control end is connected with induction coil L3 through resistance R 6; L3 is connected with coil L1, the L2 inductance of being located at the interchange output loop; capacitor C 4, resistance R 5 parallel connections insert between controllable silicon V3 control end and the negative electrode.Said current foldback circuit is made up of coil L4, tongue tube A, resistance R 1, and coil L4 is located at and exchanges in the output loop, and tongue tube A is electrically connected with L4, and the two ends of tongue tube A link to each other with ac input circuit respectively.
Owing to adopted electric leakage electrical shock protection circuit, current foldback circuit, overvoltage crowbar simultaneously in the utility model circuit; but deenergization when electric leakage is got an electric shock so not only; simultaneously; when circuit overcurrent or overvoltage, under the situation of not damaging electrical equipment, but deenergization too; thereby protected electrical equipment; and this device reliability height can cut off the power supply automatically at the moment of fault, thereby has played the integrated protection effect.
Describe in detail below in conjunction with drawings and Examples.
Fig. 1 is a circuit block diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
By shown in Figure 1, the DC power supply circuit input termination AC power in electric leakage electric shock, overcurrent, its circuit of over-pressure safety device; Its output is connected with overvoltage crowbar, electric leakage electrical shock protection circuit respectively; the overvoltage crowbar input is connected with AC power; electric leakage electrical shock protection circuit signal collection terminal is located at and is exchanged in the output loop; current foldback circuit is serially connected with and exchanges in the output loop, and the output of overvoltage crowbar, electric leakage electrical shock protection circuit, current foldback circuit is communicated with respectively at the output control circuit in the ac circuit.When circuit overvoltage, overcurrent occur, when electric leakage is got an electric shock, then can pass through overvoltage crowbar, current foldback circuit and electric leakage electrical shock protection circuit respectively switch opens in the connected output control circuit and power supply are disconnected, reach the protection purpose.
As shown in Figure 2, the utility model output control circuit is made up of relay J, dropout K switch, capacitor C 1, and relay J is serially connected with in the ac circuit, and the dropout K switch is located at the input of ac circuit.DC power supply circuit of the present utility model is made up of bridge rectifier and resistance R 2, capacitor C 2 that diode D1-D4 forms, resistance R 2 be connected to the bridge rectifier output after capacitor C 2 is connected.Overvoltage crowbar of the present utility model is by controllable silicon V1, V2; resistance R 3, R4, capacitor C 3, diode D1, D2 form; after controllable silicon V1, the V2 serial connection and in the output of rectification circuit; the control end of its V1, V2 is connected with ac circuit through R3, R4 respectively, and capacitor C 3 is coupled between V1, the V2 control end.The utility model electric leakage electrical shock protection circuit is made up of controllable silicon V3, capacitor C 4, resistance R 5, R6, coil L1, L2, L3; controllable silicon V3 is connected to the bridge rectifier output; its control end is connected with induction coil L3 through resistance R 6; L3 is connected with coil L1, the L2 inductance of being located at the interchange output loop; capacitor C 4, resistance R 5 parallel connections insert between controllable silicon V3 control end and the negative electrode.Current foldback circuit of the present utility model is made up of coil L4, tongue tube A, resistance R 1, and coil L4 is located at and exchanges in the output loop, and tongue tube A is electrically connected with L4, and the two ends of tongue tube A link to each other with ac input circuit respectively.
The utility model circuit working principle is: when occurring two-phase electricity in the circuit and form overvoltage; at this moment two pulse voltages are just arranged on resistance R 3, the R4 in the overvoltage crowbar; thereby trigger controllable silicon V1, V2 conducting; make the relay J adhesive in the output control circuit; thereby open the dropout K switch, deenergization.
When appearance in the circuit and ground short circuit, electric leakage during with formation loop, ground; because coil L1, L 2 in the output loop are connected with coil L3 inductance in the electrical shock protection circuit that leaks electricity; so just cause L1, L2 magnetic field not to cancel each other; thereby make coil L3 that changes of magnetic field be arranged; produce voltage and trigger the control utmost point of controllable silicon V3; make controllable silicon V3 conducting, thereby make the relay J adhesive of output control circuit, open dropout K switch deenergization.
When occurring the overload overcurrent in the circuit, just produce big magnetic field in the current foldback circuit on the coil L4, thus the tongue tube A closing of contact that is electrically connected with it, thus make relay J adhesive in the output control circuit, open the dropout K switch, deenergization.
Claims (6)
1, a kind of electric leakage electric shock, overcurrent, over-pressure safety device is characterized in that it comprises output control circuit, DC power supply circuit, overvoltage crowbar, electric leakage electrical shock protection circuit, current foldback circuit; Described DC power supply circuit input termination AC power, its output is connected with overvoltage crowbar, electric leakage electrical shock protection circuit respectively; The overvoltage crowbar input links to each other with AC power; electric leakage electrical shock protection circuit signal collection terminal is located at and is exchanged in the output loop; current foldback circuit is serially connected with and exchanges in the output loop, and the output of its overvoltage crowbar, electric leakage electrical shock protection circuit, current foldback circuit is communicated with output control circuit in the ac circuit respectively.
2, a kind of electric leakage electric shock according to claim 1, overcurrent, over-pressure safety device; it is characterized in that said output control circuit is made up of relay J, dropout K switch, capacitor C 1; relay J is serially connected with in the ac circuit, and the dropout K switch is located at the input of ac circuit.
3, a kind of electric leakage electric shock according to claim 1, overcurrent, over-pressure safety device; it is characterized in that said DC power supply circuit is made up of bridge rectifier and resistance R 2, capacitor C 2 that diode D1-D4 forms, resistance R 2 be connected to the bridge rectifier output after capacitor C 2 is connected.
4, a kind of electric leakage electric shock according to claim 1, overcurrent, over-pressure safety device; it is characterized in that said overvoltage crowbar is by controllable silicon V1, V2; resistance R 3, R4, capacitor C 3, diode D1, D2 form; after controllable silicon V1, the V2 serial connection and in the output of rectification circuit; the control end of its V1, V2 is connected with ac circuit through R3, R4 respectively, and capacitor C 3 is coupled between V1, the V2 control end.
5, a kind of electric leakage electric shock according to claim 1, overcurrent, over-pressure safety device; it is characterized in that said electric leakage electrical shock protection circuit is made up of controllable silicon V3, capacitor C 4, resistance R 5, R6, coil L1, L2, L3; controllable silicon V3 is connected to the bridge rectifier output; its control end is connected with induction coil L3 through resistance R 6; L3 is connected with coil L1, the L2 inductance of being located at the interchange output loop; capacitor C 4, resistance R 5 parallel connections insert between controllable silicon V3 control end and the negative electrode.
6, a kind of electric leakage electric shock according to claim 1, overcurrent, over-pressure safety device; it is characterized in that said current foldback circuit is made up of coil L4, tongue tube A, resistance R 1; coil L4 is located at and exchanges in the output loop; tongue tube A is electrically connected with L4, and the two ends of tongue tube A link to each other with ac input circuit respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99258893 CN2409694Y (en) | 1999-12-27 | 1999-12-27 | Protector for electric leakage electric shock, overcurrent and overvoltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99258893 CN2409694Y (en) | 1999-12-27 | 1999-12-27 | Protector for electric leakage electric shock, overcurrent and overvoltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2409694Y true CN2409694Y (en) | 2000-12-06 |
Family
ID=34041351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99258893 Expired - Fee Related CN2409694Y (en) | 1999-12-27 | 1999-12-27 | Protector for electric leakage electric shock, overcurrent and overvoltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2409694Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104092204A (en) * | 2014-06-26 | 2014-10-08 | 青岛浩海网络科技股份有限公司 | Overcurrent protection intelligent switch for forest fire prevention and overcurrent protection method thereof |
-
1999
- 1999-12-27 CN CN 99258893 patent/CN2409694Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104092204A (en) * | 2014-06-26 | 2014-10-08 | 青岛浩海网络科技股份有限公司 | Overcurrent protection intelligent switch for forest fire prevention and overcurrent protection method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |