CN204559096U - A kind of security appliance protective circuit - Google Patents
A kind of security appliance protective circuit Download PDFInfo
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- CN204559096U CN204559096U CN201520283870.4U CN201520283870U CN204559096U CN 204559096 U CN204559096 U CN 204559096U CN 201520283870 U CN201520283870 U CN 201520283870U CN 204559096 U CN204559096 U CN 204559096U
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Abstract
The utility model discloses a kind of security appliance protective circuit; comprise fuse FU, rectifier bridge Q, transformer T, three terminal regulator U1, chip U2, chip U3, relay J and diode D1; fuse FU one end connects 220V alternating current one end; the fuse FU other end is connection transformer T coil L1, relay J contact J-1 respectively, and the relay J contact J-1 other end connects load RL.The utility model security appliance protective circuit, except having over-and under-voltage defencive function, also has delay function, can under various fortuitous event the Electrical Safety of available protecting electrical equipment, circuit structure is simple, and cost is low, is applicable to very much promoting the use of.
Description
Technical field
The utility model relates to a kind of protective circuit, specifically a kind of security appliance protective circuit.
Background technology
Along with the progress of science and technology and the raising of people's living standard, no matter cities and towns or rural area, the home appliances such as various electric cooking appliance, electric heater, TV, refrigerator are crowded in the family life of people just in a large number, safety utilization of electric power simultaneously, prevent from causing electrical fire because of household electrical appliance improper use, become to cause and closed critical problem.
Utility model content
The purpose of this utility model is the security appliance protective circuit providing a kind of over-and under-voltage to protect, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of security appliance protective circuit, comprises fuse FU, rectifier bridge Q, transformer T, three terminal regulator U1, chip U2, chip U3, relay J and diode D1, described fuse FU one end connects 220V alternating current one end, and the fuse FU other end is connection transformer T coil L1 respectively, relay J contact J-1, the relay J contact J-1 other end connects load RL, the load RL other end is the connection transformer T coil L1 other end and the 220V alternating current other end respectively, and transformer T coil L2 two ends connect rectifier bridge Q pin 1 and pin 3 respectively, and rectifier bridge Q pin 4 connects electric capacity C1 respectively, three terminal regulator U1 pin 2, potentiometer RP2, potentiometer RP1, resistance R2, chip U2 pin 4, resistance R4, chip U3 pin 1, LED2 negative pole, relay J coil and diode D4 positive pole, rectifier bridge Q pin 2 connects three terminal regulator U1 pin 2 respectively, the electric capacity C1 other end, the potentiometer RP1 other end and the potentiometer RP2 other end, three terminal regulator U1 pin 3 is contact resistance R1 respectively, chip U2 pin 8, resistance R3, electric capacity C2, chip U3 pin 4, chip U3 pin 8 and LED1 positive pole, the chip U2 pin 6 contact resistance R1 other end, chip U2 pin 2 and the resistance R2 other end, chip U2 pin 5 connects potentiometer RP1 slide plate, chip U2 pin 3 connects potentiometer RP2 slide plate, chip U2 pin 1 connects diode D3 positive pole, diode D3 negative pole connects diode D1 negative pole and diode D2 negative pole respectively, and diode D1 positive pole connects chip U2 pin 7, described diode D2 positive pole connecting triode VT1 base stage, the triode VT1 collector electrode contact resistance R3 other end, triode VT1 emitter is the contact resistance R4 other end respectively, the electric capacity C2 other end, chip U3 pin 2 and chip U3 pin 6, chip U3 pin 3 contact resistance R5 respectively, resistance R6, the relay J coil other end and diode D4 negative pole, the resistance R5 other end connects LED2 positive pole, and the described resistance R6 other end connects LED1 negative pole.
As further program of the utility model: described three terminal regulator U1 model is 7812.
As further program of the utility model: described chip U2 model is LM358.
As the utility model further scheme: described chip U3 model is NE555.
Compared with prior art; the beneficial effects of the utility model are: the utility model security appliance protective circuit is except having over-and under-voltage defencive function; also there is delay function; can under various fortuitous event the Electrical Safety of available protecting electrical equipment; circuit structure is simple; cost is low, is applicable to very much promoting the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of security appliance protective circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of security appliance protective circuit, comprises fuse FU, rectifier bridge Q, transformer T, three terminal regulator U1, chip U2, chip U3, relay J and diode D1, fuse FU one end connects 220V alternating current one end, and the fuse FU other end is connection transformer T coil L1 respectively, relay J contact J-1, the relay J contact J-1 other end connects load RL, the load RL other end is the connection transformer T coil L1 other end and the 220V alternating current other end respectively, and transformer T coil L2 two ends connect rectifier bridge Q pin 1 and pin 3 respectively, and rectifier bridge Q pin 4 connects electric capacity C1 respectively, three terminal regulator U1 pin 2, potentiometer RP2, potentiometer RP1, resistance R2, chip U2 pin 4, resistance R4, chip U3 pin 1, LED2 negative pole, relay J coil and diode D4 positive pole, rectifier bridge Q pin 2 connects three terminal regulator U1 pin 2 respectively, the electric capacity C1 other end, the potentiometer RP1 other end and the potentiometer RP2 other end, three terminal regulator U1 pin 3 is contact resistance R1 respectively, chip U2 pin 8, resistance R3, electric capacity C2, chip U3 pin 4, chip U3 pin 8 and LED1 positive pole, the chip U2 pin 6 contact resistance R1 other end, chip U2 pin 2 and the resistance R2 other end, chip U2 pin 5 connects potentiometer RP1 slide plate, chip U2 pin 3 connects potentiometer RP2 slide plate, chip U2 pin 1 connects diode D3 positive pole, diode D3 negative pole connects diode D1 negative pole and diode D2 negative pole respectively, and diode D1 positive pole connects chip U2 pin 7, diode D2 positive pole connecting triode VT1 base stage, the triode VT1 collector electrode contact resistance R3 other end, triode VT1 emitter is the contact resistance R4 other end respectively, the electric capacity C2 other end, chip U3 pin 2 and chip U3 pin 6, chip U3 pin 3 contact resistance R5 respectively, resistance R6, the relay J coil other end and diode D4 negative pole, the resistance R5 other end connects LED2 positive pole, and the resistance R6 other end connects LED1 negative pole.
Three terminal regulator U1 model is 7812.
Chip U2 model is LM358.
Chip U3 model is NE555.
Operation principle of the present utility model is: refer to Fig. 1, chip U1 and electric capacity C2 resistance R4 etc. form a single stabilization delay circuit, when just switching on power, because the voltage on electric capacity C2 can not transition, the pin 2 of chip U3 and pin 6 is made to have a posivtive spike pulse voltage, chip U3 is made to be in reset mode, chip U3 pin 3 is in low level, relay J is in release condition, load RL is without electricity, after this, along with the charging of electric capacity C2, chip U3 pin 2 current potential is lower than 1/3 threshold level, chip U3 is set, chip U3 pin 3 is in high level, relay J adhesive, relay J contact J-1 closes, load RL obtains electric.
When civil power is lower than 180V, chip U2 pin 1 exports high level, and diode D2 is breakdown, and triode VT1 replaces, and chip U3 pin 6 is in high level, and chip U3 resets, and chip U3 pin 3 is in low level, and relay J discharges, and completes under-voltage protection; When civil power is higher than 240V, chip U2 pin 7 exports high level, process and above-mentioned under-voltage process similar, complete overvoltage protection; When generation power-off suddenly, due to the effect of chip U3 single stabilization delay circuit, there is incoming call delay protection function.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.
Claims (4)
1. a security appliance protective circuit, comprises fuse FU, rectifier bridge Q, transformer T, three terminal regulator U1, chip U2, chip U3, relay J and diode D1, is characterized in that, described fuse FU one end connects 220V alternating current one end, and the fuse FU other end is connection transformer T coil L1 respectively, relay J contact J-1, the relay J contact J-1 other end connects load RL, the load RL other end is the connection transformer T coil L1 other end and the 220V alternating current other end respectively, and transformer T coil L2 two ends connect rectifier bridge Q pin 1 and pin 3 respectively, and rectifier bridge Q pin 4 connects electric capacity C1 respectively, three terminal regulator U1 pin 2, potentiometer RP2, potentiometer RP1, resistance R2, chip U2 pin 4, resistance R4, chip U3 pin 1, LED2 negative pole, relay J coil and diode D4 positive pole, rectifier bridge Q pin 2 connects three terminal regulator U1 pin 2 respectively, the electric capacity C1 other end, the potentiometer RP1 other end and the potentiometer RP2 other end, three terminal regulator U1 pin 3 is contact resistance R1 respectively, chip U2 pin 8, resistance R3, electric capacity C2, chip U3 pin 4, chip U3 pin 8 and LED1 positive pole, the chip U2 pin 6 contact resistance R1 other end, chip U2 pin 2 and the resistance R2 other end, chip U2 pin 5 connects potentiometer RP1 slide plate, chip U2 pin 3 connects potentiometer RP2 slide plate, chip U2 pin 1 connects diode D3 positive pole, diode D3 negative pole connects diode D1 negative pole and diode D2 negative pole respectively, and diode D1 positive pole connects chip U2 pin 7, described diode D2 positive pole connecting triode VT1 base stage, the triode VT1 collector electrode contact resistance R3 other end, triode VT1 emitter is the contact resistance R4 other end respectively, the electric capacity C2 other end, chip U3 pin 2 and chip U3 pin 6, chip U3 pin 3 contact resistance R5 respectively, resistance R6, the relay J coil other end and diode D4 negative pole, the resistance R5 other end connects LED2 positive pole, and the described resistance R6 other end connects LED1 negative pole.
2. security appliance protective circuit according to claim 1, is characterized in that, described three terminal regulator U1 model is 7812.
3. security appliance protective circuit according to claim 1, is characterized in that, described chip U2 model is LM358.
4. security appliance protective circuit according to claim 1, is characterized in that, described chip U3 model is NE555.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520283870.4U CN204559096U (en) | 2015-05-05 | 2015-05-05 | A kind of security appliance protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520283870.4U CN204559096U (en) | 2015-05-05 | 2015-05-05 | A kind of security appliance protective circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204559096U true CN204559096U (en) | 2015-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520283870.4U Expired - Fee Related CN204559096U (en) | 2015-05-05 | 2015-05-05 | A kind of security appliance protective circuit |
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| Country | Link |
|---|---|
| CN (1) | CN204559096U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849003A (en) * | 2017-03-06 | 2017-06-13 | 合肥智慧龙图腾知识产权股份有限公司 | A kind of AC network safety electricity consumption protector |
-
2015
- 2015-05-05 CN CN201520283870.4U patent/CN204559096U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849003A (en) * | 2017-03-06 | 2017-06-13 | 合肥智慧龙图腾知识产权股份有限公司 | A kind of AC network safety electricity consumption protector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150812 Termination date: 20160505 |