CN201285429Y - Detection alarm apparatus for leakage protection plug - Google Patents
Detection alarm apparatus for leakage protection plug Download PDFInfo
- Publication number
- CN201285429Y CN201285429Y CNU2008202177970U CN200820217797U CN201285429Y CN 201285429 Y CN201285429 Y CN 201285429Y CN U2008202177970 U CNU2008202177970 U CN U2008202177970U CN 200820217797 U CN200820217797 U CN 200820217797U CN 201285429 Y CN201285429 Y CN 201285429Y
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- sampling
- speech chip
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Abstract
The utility model relates to a detecting and warning device of a creepage protection plug, which can be used for household appliances, such as a water heater, a refrigerator, a washing machine, and the like. The detecting and warning device comprises a creepage voltage sampling and isolating circuit, a load current sampling and controlling circuit and a voice circuit, wherein the creepage voltage sampling and isolating circuit is connected with a power line and the voice circuit, and the load current sampling and controlling circuit is connected with the power line and the voice circuit. When an outer shell of a household appliance creeps or the creepage voltage of an earth wire of a forestage power supply device of the plug exceeds safe voltage, the detecting and warning device has voice warning function, realizes a voice prompt according to the change situation of load current and increases the safety of the plug.
Description
Technical field
The utility model relates to a kind of detection alarm device that is used for leakage protecting plug, can be used on the household electrical appliance such as water heater, refrigerator, washing machine.
Background technology
Traditional residual current protecting plug only shields to the electric equipment of output terminal, and the power-supply unit of plug prime is not protected.When the electrical leakage voltage on the ground wire surpassed safe voltage, the alarm free function can not in time be found fault, so the poor stability of plug.
Summary of the invention
The purpose of this utility model provides a kind of detection alarm device of leakage protecting plug, can detect and report to the police when electric leakage, can improve the security of plug.
The purpose of this utility model is achieved like this; a kind of detection alarm device of leakage protecting plug; comprise electrical leakage voltage sampling and buffer circuit, load current controlling of sampling circuit and sound circuit; electrical leakage voltage sampling and buffer circuit are connected with sound circuit with power lead, and load current controlling of sampling circuit is connected with sound circuit with power lead.
Described electrical leakage voltage sampling and buffer circuit are made up of resistance R 2, diode D1, capacitor C 1 and photoelectrical coupler IC1, one end ground connection of resistance R 2, the other end of resistance R 2 is connected with 1 pin of photoelectrical coupler IC1, the negative electrode of diode D1 is connected with power supply phase line N, the anode of diode D1 is connected with 2 pin of photoelectrical coupler IC1,4 pin of photoelectrical coupler IC1 meet direct supply V, and 3 pin of photoelectrical coupler IC1 are connected with sound circuit with an end of capacitor C 1, the other end ground connection of capacitor C 1.
Described load current controlling of sampling circuit is made up of current transformer L1, triode Q1, resistance R 1 and capacitor C 2, C3, power supply phase line N or zero line L pass current transformer L1 iron core, one end of current transformer L1 coil is connected with the base stage of triode Q1, the end of one end of the collector of triode Q1 and resistance R 1, capacitor C 2, C3 is connected, another termination direct supply V of resistance R 1, the other end of capacitor C 2 is connected with sound circuit, the grounded emitter of the other end of current transformer L1 coil, the other end of capacitor C 3 and triode Q1.
Described sound circuit is made up of speech chip IC2, loudspeaker SP and resistance R 3, one end of resistance R 3 and 7 pin of speech chip IC2 meet direct supply V, the other end of resistance R 3 is connected with 1 pin of speech chip IC2,2 pin of speech chip IC2 are connected with electrical leakage voltage sampling and buffer circuit, 3 pin of speech chip IC2 are connected with load current controlling of sampling circuit, 6,8 pin of speech chip IC2 are connected with the two ends of loudspeaker SP respectively, the 5 pin ground connection of speech chip IC2.
The utility model leaks electricity at household appliances shell, or the electrical leakage voltage on the ground wire of the power-supply unit of plug prime has the audio alert function when surpassing safe voltage, according to the situation of change of load current, realizes voice suggestion, the security that has improved plug.
Description of drawings
Fig. 1 is a theory diagram of the present utility model.
Fig. 2 is an electrical schematic diagram of the present utility model.
Embodiment
Have residual current to detect in the leakage protecting plug and the dropout holding circuit, to the load-side leakage current defencive function that detects and thread off, when electric leakage took place, the output trip signal drove tripping coil and finishes the action of threading off.And the utility model has increased the electrical leakage voltage measuring ability on leakage protecting plug; household appliances shell leaks electricity, or the electrical leakage voltage on the ground wire of the power-supply unit of plug prime has the audio alert function when surpassing safe voltage; according to the situation of change of load current, realize voice suggestion.
Electrical leakage voltage sampling and buffer circuit are made up of resistance R 2, diode D1, capacitor C 1 and photoelectrical coupler IC1, photoelectrical coupler IC1 adopts PC817, when electrical leakage voltage surpasses safe voltage, photodiode conducting among the photoelectrical coupler IC1 makes phototriode output high level signal give sound circuit.Load current controlling of sampling circuit is made up of current transformer L1, triode Q1, resistance R 1 and capacitor C 2, C3, gives sound circuit according to the break-make output pulse signal of load current.Sound circuit is made up of speech chip IC2, loudspeaker SP and resistance R 3, speech chip IC2 adopts APT020, high level signal according to electrical leakage voltage sampling and buffer circuit output sends alerting signal, and the current switching pulse signal that sends according to load current controlling of sampling circuit sends voice suggestion.
Claims (4)
1, a kind of detection alarm device of leakage protecting plug; it is characterized in that comprising electrical leakage voltage sampling and buffer circuit, load current controlling of sampling circuit and sound circuit; electrical leakage voltage sampling and buffer circuit are connected with sound circuit with power lead, and load current controlling of sampling circuit is connected with sound circuit with power lead.
2; the detection alarm device of leakage protecting plug according to claim 1; it is characterized in that described electrical leakage voltage sampling and buffer circuit are by resistance (R2); diode (D1); electric capacity (C1) and photoelectrical coupler (IC1) are formed; one end ground connection of resistance (R2); the other end of resistance (R2) is connected with 1 pin of photoelectrical coupler (IC1); the negative electrode of diode (D1) is connected with power supply phase line (N); the anode of diode (D1) is connected with 2 pin of photoelectrical coupler (IC1); 4 pin of photoelectrical coupler (IC1) connect direct supply (V); 3 pin of photoelectrical coupler (IC1) are connected with sound circuit with an end of electric capacity (C1), the other end ground connection of electric capacity (C1).
3; the detection alarm device of leakage protecting plug according to claim 1; it is characterized in that described load current controlling of sampling circuit is by current transformer (L1); triode (Q1); resistance (R1) and electric capacity (C2; C3) form; power supply phase line (N) or zero line (L) pass current transformer (L1) iron core; one end of current transformer (L1) coil is connected with the base stage of triode (Q1); one end of the collector of triode (Q1) and resistance (R1); electric capacity (C2; C3) a end connects; another termination direct supply (V) of resistance (R1); the other end of electric capacity (C2) is connected with sound circuit, the other end of current transformer (L1) coil; the grounded emitter of the other end of electric capacity (C3) and triode (Q1).
4; the detection alarm device of leakage protecting plug according to claim 1; it is characterized in that described sound circuit is by speech chip (IC2); loudspeaker (SP) and resistance (R3) are formed; 7 pin of one end of resistance (R3) and speech chip (IC2) connect direct supply (V); the other end of resistance (R3) is connected with 1 pin of speech chip (IC2); 2 pin of speech chip (IC2) are connected with electrical leakage voltage sampling and buffer circuit; 3 pin of speech chip (IC2) are connected with load current controlling of sampling circuit; 6 of speech chip (IC2); 8 pin are connected with the two ends of loudspeaker (SP) respectively, 5 pin ground connection of speech chip (IC2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202177970U CN201285429Y (en) | 2008-11-11 | 2008-11-11 | Detection alarm apparatus for leakage protection plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202177970U CN201285429Y (en) | 2008-11-11 | 2008-11-11 | Detection alarm apparatus for leakage protection plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201285429Y true CN201285429Y (en) | 2009-08-05 |
Family
ID=40950414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202177970U Expired - Fee Related CN201285429Y (en) | 2008-11-11 | 2008-11-11 | Detection alarm apparatus for leakage protection plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201285429Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539991A (en) * | 2010-12-31 | 2012-07-04 | 鸿富锦精密工业（深圳）有限公司 | Electricity leakage alarming device |
| CN103924649A (en) * | 2013-01-14 | 2014-07-16 | 刘命辉 | Anti-dirt body cleaner and rapid water heater grounding protective plug three-way pressure reducing valve thereof |
| CN109342873A (en) * | 2018-11-26 | 2019-02-15 | 杨卫珍 | A kind of metal-back electric equipment products electric leakage alarm device with self-checking function |
-
2008
- 2008-11-11 CN CNU2008202177970U patent/CN201285429Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539991A (en) * | 2010-12-31 | 2012-07-04 | 鸿富锦精密工业（深圳）有限公司 | Electricity leakage alarming device |
| CN103924649A (en) * | 2013-01-14 | 2014-07-16 | 刘命辉 | Anti-dirt body cleaner and rapid water heater grounding protective plug three-way pressure reducing valve thereof |
| CN109342873A (en) * | 2018-11-26 | 2019-02-15 | 杨卫珍 | A kind of metal-back electric equipment products electric leakage alarm device with self-checking function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090805 Termination date: 20101111 |