CN204633735U - A kind of refrigerator protective circuit - Google Patents
A kind of refrigerator protective circuit Download PDFInfo
- Publication number
- CN204633735U CN204633735U CN201520281975.6U CN201520281975U CN204633735U CN 204633735 U CN204633735 U CN 204633735U CN 201520281975 U CN201520281975 U CN 201520281975U CN 204633735 U CN204633735 U CN 204633735U
- Authority
- CN
- China
- Prior art keywords
- resistance
- triode
- refrigerator
- diode
- connects
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a kind of refrigerator protective circuit, comprise resistance R1, key switch S, triode VT1 and diode D1.Utility model circuit can produce delay effect when voltage ripple of power network or power failure; to reduce the harmful effect to freezer compressor etc.; if power-off time is very short; even can not there is circut breaking in refrigerator, effectively protect the safety of refrigerator, extends the useful life of refrigerator; and circuit structure is simple; function-stable, in addition owing to not using any electronic chip, antijamming capability is strong.
Description
Technical field
The utility model relates to a kind of protective circuit, specifically a kind of refrigerator protective circuit.
Background technology
At present, refrigerator has become the requisite household electrical appliances of every household, but the thing that refrigerator restores electricity again after in use often running into and having a power failure instantaneously immediately, our generation of above-mentioned situation as you know can damage refrigerator, because moment starts again after refrigerator has a power failure suddenly, compressor is in startup moment, its armature winding electric current will be multiplied, comparatively person will affect refrigerator useful life, time serious, compressor can be made to burn, existing refrigerator protective device circuit structure is more complicated, manufacturing cost is relatively high, need thus to improve.
Utility model content
The purpose of this utility model is to provide the refrigerator protective circuit that a kind of structure is simple, cost is low, 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 refrigerator protective circuit, comprise resistance R1, key switch S, triode VT1 and diode D1, described triode VT1 collector electrode is connecting triode VT3 emitter respectively, resistance R3, key switch S and 220V alternating current one end, triode VT1 emitter is contact resistance R7 respectively, diode D3 negative pole and refrigerator, the refrigerator other end connects the 220V alternating current other end, described diode D3 positive pole contact resistance R8, the resistance R8 other end connects diode D1 positive pole, diode D1 negative pole connects diode D2 negative pole and triode VT2 base stage respectively, triode VT2 emitter connects electric capacity C1 and ground connection, triode VT2 collector electrode connects the electric capacity C1 other end and resistance R4 respectively, the resistance R4 other end is the contact resistance R3 other end and triode VT3 base stage respectively, triode VT3 collector electrode is contact resistance R6 and the resistance R7 other end respectively, resistance R6 other end connecting triode VT1 base stage, described key switch S other end contact resistance R1, the resistance R1 other end connects earth resistance R2 and resistance R5 respectively, the resistance R5 other end connects diode D2 positive pole.
As the utility model further scheme: described diode D3 is voltage stabilizing didoe.
Compared with prior art; the beneficial effects of the utility model are: the utility model circuit can produce delay effect when voltage ripple of power network or power failure; to reduce the harmful effect to freezer compressor etc., if power-off time is very short, even can not there is circut breaking in refrigerator; effectively protect the safety of refrigerator; extend the useful life of refrigerator, and circuit structure is simple, function-stable; in addition owing to not using any electronic chip, antijamming capability is strong.
Accompanying drawing explanation
Fig. 1 is a kind of circuit diagram of refrigerator 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 refrigerator protective circuit, comprise resistance R1, key switch S, triode VT1 and diode D1, triode VT1 collector electrode is connecting triode VT3 emitter respectively, resistance R3, key switch S and 220V alternating current one end, triode VT1 emitter is contact resistance R7 respectively, diode D3 negative pole and refrigerator, the refrigerator other end connects the 220V alternating current other end, diode D3 positive pole contact resistance R8, the resistance R8 other end connects diode D1 positive pole, diode D1 negative pole connects diode D2 negative pole and triode VT2 base stage respectively, triode VT2 emitter connects electric capacity C1 and ground connection, triode VT2 collector electrode connects the electric capacity C1 other end and resistance R4 respectively, the resistance R4 other end is the contact resistance R3 other end and triode VT3 base stage respectively, triode VT3 collector electrode is contact resistance R6 and the resistance R7 other end respectively, resistance R6 other end connecting triode VT1 base stage, key switch S other end contact resistance R1, the resistance R1 other end connects earth resistance R2 and resistance R5 respectively, the resistance R5 other end connects diode D2 positive pole.
Diode D3 is voltage stabilizing didoe.
Operation principle of the present utility model is: in the utility model circuit, electric capacity C1 is charged by resistance R2 and triode VT3, when there is circut breaking, when diode D3 cathode voltage drops to the puncture voltage of diode D3, diode D3 ends, triode VT2 also ends, electric capacity C1 charges, when the disconnection fault time is greater than the charge constant of resistance R2 and electric capacity C1, triode VT1, VT3 ends, deenergization voltage and refrigerator path, and when the disconnection fault time is less than charge constant, triode VT1, VT3 conducting, after fault, when diode D3 cathode voltage rises to the puncture voltage being greater than diode D3, circuit normally works.When circuit is in cut-off state, after disconnection fault is got rid of, the switch S that pushes button can recover normal.
Claims (2)
1. a refrigerator protective circuit, comprise resistance R1, key switch S, triode VT1 and diode D1, it is characterized in that, described triode VT1 collector electrode is connecting triode VT3 emitter respectively, resistance R3, key switch S and 220V alternating current one end, triode VT1 emitter is contact resistance R7 respectively, diode D3 negative pole and refrigerator, the refrigerator other end connects the 220V alternating current other end, described diode D3 positive pole contact resistance R8, the resistance R8 other end connects diode D1 positive pole, diode D1 negative pole connects diode D2 negative pole and triode VT2 base stage respectively, triode VT2 emitter connects electric capacity C1 and ground connection, triode VT2 collector electrode connects the electric capacity C1 other end and resistance R4 respectively, the resistance R4 other end is the contact resistance R3 other end and triode VT3 base stage respectively, triode VT3 collector electrode is contact resistance R6 and the resistance R7 other end respectively, resistance R6 other end connecting triode VT1 base stage, described key switch S other end contact resistance R1, the resistance R1 other end connects earth resistance R2 and resistance R5 respectively, the resistance R5 other end connects diode D2 positive pole.
2. refrigerator protective circuit according to claim 1, is characterized in that, described diode D3 is voltage stabilizing didoe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520281975.6U CN204633735U (en) | 2015-04-25 | 2015-04-25 | A kind of refrigerator protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520281975.6U CN204633735U (en) | 2015-04-25 | 2015-04-25 | A kind of refrigerator protective circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204633735U true CN204633735U (en) | 2015-09-09 |
Family
ID=54052715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520281975.6U Expired - Fee Related CN204633735U (en) | 2015-04-25 | 2015-04-25 | A kind of refrigerator protective circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204633735U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106992494A (en) * | 2017-05-04 | 2017-07-28 | 安徽庆睿实业有限责任公司 | Refrigerator with circuit protection function |
-
2015
- 2015-04-25 CN CN201520281975.6U patent/CN204633735U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106992494A (en) * | 2017-05-04 | 2017-07-28 | 安徽庆睿实业有限责任公司 | Refrigerator with circuit protection function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204316078U (en) | A kind of power automatic switch circuit with over-voltage over-current protection | |
| CN104410049A (en) | Automatic power source turning on-off circuit with overvoltage and overcurrent protection circuit | |
| CN201868860U (en) | Overdischarge protective circuit of handheld dust collector | |
| CN202159967U (en) | Switch power supply short-circuit protection circuit | |
| CN204633735U (en) | A kind of refrigerator protective circuit | |
| CN205039527U (en) | AC motor starting up overcurrent protector | |
| CN205121473U (en) | Computer power failure protection circuit | |
| CN207074888U (en) | A kind of LED display power supply backup circuit | |
| CN205753366U (en) | A kind of battery output short-circuit protection circuit | |
| CN106158510A (en) | A kind of control relay circuit | |
| CN204928112U (en) | Direct current surge suppression circuit and DC power supply power supply system | |
| CN201331740Y (en) | Reset circuit | |
| CN204304414U (en) | A kind of safe lithium ion battery | |
| CN204391868U (en) | Self-disconnecting charging circuit | |
| CN204103480U (en) | A kind of charger reversal connection and short-circuit protection circuit | |
| CN203278357U (en) | Charging port circuit with overvoltage protection function | |
| CN209417237U (en) | DC relay closed state detection device | |
| CN204538653U (en) | A kind of guard of computer circuit | |
| CN204858535U (en) | Battery under voltage protection circuit is held to little consumption | |
| CN204730563U (en) | A kind of protector for refrigerator | |
| CN101635450A (en) | Circuit water-proof device | |
| CN202663167U (en) | Non-polarized battery charger | |
| CN204668644U (en) | A kind of safety socket circuit | |
| CN104393563A (en) | Mains supply monitoring system | |
| CN204304397U (en) | A kind of civil power monitoring system |
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 |
Granted publication date: 20150909 Termination date: 20160425 |