CN2049423U - Combined protective device of color tv set and refrigerator - Google Patents
Combined protective device of color tv set and refrigerator Download PDFInfo
- Publication number
- CN2049423U CN2049423U CN 89208639 CN89208639U CN2049423U CN 2049423 U CN2049423 U CN 2049423U CN 89208639 CN89208639 CN 89208639 CN 89208639 U CN89208639 U CN 89208639U CN 2049423 U CN2049423 U CN 2049423U
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- CN
- China
- Prior art keywords
- power
- voltage
- resistance
- circuit
- protective circuit
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Abstract
The utility model belongs to a protective device for the color TV and the refrigerator. A rectification-filtering electric source converts 220V alternating voltage into direct voltage and respectively supplies to a low-voltage destabilization protection circuit, a high-voltage destabilization protection circuit and a voltage regulator circuit; the voltage regulator circuit supplies the direct voltage after voltage stabilization to a powerdown delayed protection circuit and an electric-source-voltage destabilization protection circuit. When accident happens, the utility model can cut off a live conductor and an earthing conductor simultaneously so as to prevent interior accident from enlarging further; if the electric voltage instantaneously disturbs sharply and power supply is not stable, the power supply can be stopped immediately, so the utility model is especially suitable for the color TV; as the utility model has the performance of five-minute delayed power supply, the utility model can protect the refrigerator; in addition, the utility model has small volume and low power consumption.
Description
The utility model belongs to a kind of colour TV, refrigerator protective device.
The protector that existing a kind of refrigerator is used, its structure generally comprise straightening and filtering unit, overvoltage crowbar, low-voltage protection circuit and outage delay protection device.It is by straightening and filtering unit the 220V alternating voltage to be become direct voltage to supply with overvoltage crowbar, low-voltage protection circuit and outage delay protection device, thereby plays the effect to outage delay protection, high voltage protective and the low-voltage variation of refrigerator.Above-mentioned refrigerator protector is to adopt capacitance voltage stabilizing, and transless is isolated, and switches voltage stabilizing by the contact, and power consumption is excessive, and volume is big, Heavy Weight, and the cost height can only be used for refrigerator, can not protect colour TV, so function singleness.At present, do not see the protective device that colour TV is used on the market as yet.
The purpose of this utility model is that a kind of function of design is many, and volume is little, and cost is low, is applicable to the protective device of refrigerator, colour TV.
For achieving the above object, the utility model adopts following technical scheme:
It is made up of rectification filtering power, low pressure disturbance protective circuit and power supply display, high pressure disturbance protective circuit, voltage stabilizing circuit, off delay protection and supply voltage disturbance protective circuit five parts.Wherein rectification filtering power is that 220V AC power output dc voltage after over commutation, filtering is supplied with low pressure disturbance protective circuit and power supply display, high pressure disturbance protective circuit and voltage stabilizing circuit respectively, and voltage stabilizing circuit is delivered to the direct voltage that obtains outage delay protection and supply voltage disturbance protective circuit again after voltage stabilizing.Above-mentioned rectification filtering power comprises power transformer TP, rectifier diode D
1, filter capacitor C
1, contactor contact J
3-3, J
3-4, J
3-3, J
3-4Be normal opened contact.Low pressure disturbance protective circuit and power supply display are by 3 resistance R
1, R
2, R
3, 1 potentiometer W
1, 2 triode BG
1, BG
2, BG wherein
1Be NPN triode, BG
2Be PNP triode, 1 capacitor C
1, 1 relay J
1And LED
1Form.Above-mentioned high pressure disturbance protective circuit has 2 triode BG
3, BG
4, relay J
2, 3 resistance R
4, R
5, R
6, 1 capacitor C
3, and 1 potentiometer W
2Voltage stabilizing circuit is by series connection voltage stabilizing didoe D together
2And resistance R
7Form.Outage delay protection and supply voltage disturbance protective circuit then comprise 1 unijunction transistor BG
5, 1 triode D
2, 1 relay J
3, three groups of parallel connections relay tip J
1-2, J
2-2, J
3-2, J wherein
1-1Be normally closed contact, J
2-2, J
3-2Be normal opened contact, 3 resistance R
7, R
8, R
9, 1 capacitor C
4And self-hold circuit it by J
3-1, J
2-1, J
1-1Form, wherein J
3-1, J
1-1Be normal opened contact, J
2-1Be normally closed contact.
Above-mentioned each parts connect situation and can be illustrated in conjunction with Fig. 2.Power transformer TP primary coil two ends connect 220V AC power two ends on the one hand in the rectification filtering power, on the one hand respectively by protective tube R
DWith outage delay protection output relay contact J
3-3, J
3-4, connect with electrical appliance, and the TP secondary coil meets rectifier diode D
1Positive pole, D
1Negative pole meets filter capacitor C
1Positive pole, C
1Minus earth.In low pressure disturbance protective circuit and power supply display, resistance R
1One termination rectification filtering power (hereinafter to be referred as power supply) positive pole, the other end meets potentiometer W respectively
1With NPN triode BG
1Base stage, potentiometer W
1Connect power cathode behind sliding contact and himself other end short circuit.BG
1Collector electrode is through LED
1, current-limiting resistance R
2Meet PNP triode BG
2Base stage, BG
2Emitter connects positive source, BG
2Collector electrode is on the one hand through feedback resistance R
3Meet BG
1Base stage to realize positive feedback, is connected on relay J on the other hand
1Magnet exciting coil one end, J
1Another termination power cathode of magnet exciting coil.In addition, BG
2The protection capacitor C
2Positive and negative electrode is attempted by J
1Magnet exciting coil two ends.In the above-mentioned high pressure disturbance protective circuit, resistance R
4One termination power positive pole, the other end meet NPN triode BG respectively
3Base stage and potentiometer W
2One end, W
2Connect power cathode behind the other end and its sliding contact short circuit.BG
3Collector electrode is through coupling resistance R
5Meet PNP triode BG
4Base stage, BG
4Collector electrode also is connected on relay J
2The magnet exciting coil upper end, termination power cathode under the magnet exciting coil.The protection capacitor C
3With J
2The parallel connection of magnet exciting coil upper and lower end.In the above-mentioned voltage stabilizing circuit, resistance R
7One termination power positive pole, voltage stabilizing didoe D
2Negative pole connects power cathode.Charging resistor R in above-mentioned outage delay protection and the supply voltage disturbance protective circuit
8One termination power positive pole, other end order junction transistors BG
5Emitter e
1Be connected on charging capacitor C simultaneously
4Positive pole and J
1-2, J
2-2, J
3-2Contact on.J
1-1, J
2-2, J
3-2The other end and C
4Negative pole and connect after, connect power cathode.BG
5The second base stage b
2Pass through resistance R
9Connect positive source, BG
5The first base stage b
1Through resistance R
10Connect power cathode, simultaneously b
1Pass through R
11Be connected on triode BG
6On the base stage, BG
6Emitter connects power cathode, BG
6Collector connecting relay J
3The magnet exciting coil lower end, J
3Terminate on the positive source on the magnet exciting coil.Self-hold circuit is actually three contact J of relay
3-1, J
2-1, J
1-1, three contact J of this series connection
3-1, J
2-1, J
1-1With LED
2After the series connection, its two ends are connected in parallel on triode BG respectively
6Collector electrode and emitter on.
The utility model circuit theory still is illustrated in conjunction with Fig. 2.
When supply power voltage is higher than 198V, triode BG
1, BG
2Work, relay J
1Excitation, then J
1-2The contact tripping, C
4Begin charging, delay circuit work; J
1-1Closure is relay J
3Work is ready; LED
1Shinny, the power supply of expression power supply is normal.After time-delay in 5 minutes, BG
5, BG
6Work, then J
3Excitation, J at this moment
3-1Closure makes J
3Be in the self-sustaining state; J
3-2Closure is given delay capacitor C
4Discharge for next one time-delay is got ready, and forces BG
5, BG
6End; J
3-3, J
3-4Closure, at this moment the whole protecting device is in normal operating conditions, at this moment LED
2Shinny.
If supply voltage is subjected to the influence of unexpected factor, thunderous film rings and during moment big ups and downs, then BG
3, BG
4Work, relay J
2Excitation, J
2-1Tripping forces J
3Outage, J
3-1Disconnect, thereby self-hold circuit is disconnected; J
3-2Tripping is for delay circuit work is got ready: J
3-3, J
3-4Tripping, cut off simultaneously fire, two power lines, protector is stopped power supply.Stable up to the line voltage answer, after disturbance voltage was replied normally, protector was promptly replied colour TV, refrigerator power supply.Thereby make its operate as normal.In addition, the delay circuit supply power voltage is adopted the voltage-stabiliser tube D of model 2CW19
2Carry out voltage stabilizing, its objective is to guarantee that charging voltage is constant, guarantee the accuracy of time.
When voltage is lower than 175V, BG
1, BG
2Do not work J
1Have a power failure, thereby turn-off J
3, cause the electrical appliance power supply to be cut off.
From the above mentioned, the utlity model has following advantage:
1, when supply voltage rapid disturbance of moment, unstable power supply, the utility model is promptly stopped power supply, and after answer is stable, automatically replies power supply, so be particularly suitable for colour TV is protected.
2, live wire, ground wire are cut off in employing simultaneously, further enlarge to prevent colour TV, refrigerator inside accident, and guarantee personal safety.
3, when instant cut-off occurring and reply the situation of power supply again, this circuit has after the time-delay in 5 minutes the performance of power supply again, and the delay protection performance of promptly cutting off the power supply is so protect the unlikely overload of freezer compressor.
4, the utility model is no more than 250V(such as light hours at night when voltage), or voltage is lower than 175V(such as network load is overweight) can guarantee to stop power supply automatically, be returned to normal value up to line voltage and just automatically reply power supply.Thereby can avoid because of the long time power overtension or cross when low, and influence colour TV, refrigerator life-span.
5, because voltage-stabiliser tube D
ZAdopt the 2CW19 that power is little, volume is little, price is low, so whole device volume is dwindled, cost reduces, and power consumption only is 1.2W.
Fig. 1 is the utility model box structure schematic diagram.
Wherein:
1, rectification filtering power; 2, low pressure disturbance protective circuit and power indicator (2); 3, high pressure disturbance protective circuit; 4, voltage stabilizing circuit; 5, outage delay protection and supply voltage disturbance protective circuit.
Fig. 2 is the utility model circuit theory diagrams.
Wherein:
BG
1, BG
3All adopt 3DG6C, BG
2, BG
4Be 3CG21A, BG
5, BG
6Be respectively BT33D and 3DG12C.
D
1：1N4005；D
2：2CP12；D
Z：2CW19。
J
1, J
2, J
3Be respectively: JZX-10M, JZX-10M, JZX-18F.
R
1, R
2, R
3, R
4, R
5, R
6, R
7, R
8, R
9, R
10, R
11Be respectively: 36k Ω, 5.1k Ω, 120k Ω, 47k Ω, 5.1k Ω, 120k Ω, 100 Ω, 1.5M Ω, 470 Ω, 470 Ω and 5.1k Ω.
W
1, W
2Be 4.7k Ω.
C
1, C
4Be 220 μ F; C
2, C
3Be 4 μ F.
Claims (6)
1; a kind of comprehensive protection device that is used for the colour TV refrigerator; it is characterized in that; be by rectification filtering power (1); low pressure disturbance protective circuit and power indicator (2); high pressure disturbance protective circuit (3); voltage stabilizing circuit (4); outage delay protection and supply voltage disturbance protective circuit (5) are formed; described rectification filtering power (1) is supplied with low pressure disturbance protective circuit and power indicator (2) respectively with direct voltage; high pressure disturbance protective circuit (3); voltage stabilizing circuit (4); after the direct voltage voltage stabilizing that voltage stabilizing circuit (4) is supplied with rectification filtering power (1) again; supply with outage delay protection and supply voltage disturbance protective circuit, described rectification filtering power (1) is by power transformer TP; rectifier diode D
1, filter capacitor C
1, contactor contact J
3-3, J
3-4Form, low pressure disturbance protective circuit and power indicator (2) comprise 2 triode BG
1, BG
2, relay J
1, potentiometer W
1, LED
1, 3 resistance R
1, R
2, R
3And capacitor C
2, high pressure disturbance protective circuit (3) is by 2 triode BG
3, BG
4, relay holds J
2, 3 resistance R
4, R
5, R
6And capacitor C
3Form, voltage stabilizing circuit (4) is the voltage stabilizing didoe D of series connection
2And resistance R
7, outage delay protection and supply voltage disturbance protective circuit (5) comprise unijunction transistor BG
5, triode BG
6, diode D
2, relay J
3, three groups of parallel connections relay tip J
1-2, J
2-2, J
3-2, 4 resistance R
8, R
9, R
10, R
11, capacitor C
4And self-hold circuit J
3-1, J
2-1, J
1-1
2, colour TV refrigerator comprehensive protection device according to claim 1 is characterized in that, the power transformer TP primary coil in the described rectification filtering power (1) connects the 220V AC power, TP secondary coil one output termination rectifier diode D
1Positive pole, D
1Negative pole meets filter capacitor C
1Positive pole, C
1Negative pole connects power cathode.
3, colour TV refrigerator comprehensive protection device according to claim 1 is characterized in that, resistance R in described low pressure disturbance protective circuit and the power supply display (2)
1The described rectification filtering power of one termination (1) output head anode, R
1Another termination potentiometer W
1Meet NPN triode BG simultaneously
1Base stage, BG
1Collector electrode is through LED
1, current-limiting resistance R
2Meet PNP triode BG
2Base stage, BG
2Collector electrode is through feedback resistance R
3Meet BG
1Base stage.
4, colour TV refrigerator comprehensive protection device according to claim 1 is characterized in that, resistance R in the described high pressure disturbance protective circuit (3)
4Connect rectification filtering power (1) positive pole, R
4Another termination potentiometer W
2, meet NPN triode BG simultaneously
3Base stage, BG
3Collector electrode is through coupling resistance R
9Meet PNP triode BG
4Base stage, BG
3Emitter meets power supply (1) negative pole, BG
4Emitter meets power supply (1) positive pole, BG
4Collector connecting relay J
2The magnet exciting coil upper end.
5, colour TV refrigerator comprehensive protection device according to claim 1 is characterized in that, resistance R in the described voltage stabilizing circuit (4)
7One termination rectification filtering power (1) positive pole, its other end and voltage stabilizing didoe D
ZAnodal connection, D
ZNegative pole connects power supply (1) negative pole.
6, colour TV refrigerator comprehensive protection device according to claim 1 is characterized in that, the charging resistor R in described outage delay protection and the supply voltage disturbance protective circuit (5)
8The described voltage stabilizing circuit of one termination (4) output head anode, other end order junction transistors BG
5Emitter meets charging capacitor C simultaneously
4Positive pole and J
1-2, J
2-2, J
3-2On the contact, J
1-1, J
2-2, J
3-2The other end and C
4Negative pole and connect after, connect rectification filtering power (1) negative pole, BG
5Second base stage is passed through resistance R
9Connect voltage stabilizing circuit (4) positive pole, BG
5First base stage is passed through resistance R
10Connect power supply (1) negative pole, simultaneously BG
5First base stage is through resistance R
11Meet triode BG
6Base stage, BG
6Emitter meets power supply (1) negative pole, BG
6Collector connecting relay J
3The magnet exciting coil lower end, J
3Termination power on the magnet exciting coil (4) positive pole, self-hold circuit repeat circuit contact J
3-1, J
2-1, J
1-1, LED
2After the series connection, its two ends are attempted by BG respectively
6On collector electrode and the emitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89208639 CN2049423U (en) | 1989-06-16 | 1989-06-16 | Combined protective device of color tv set and refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89208639 CN2049423U (en) | 1989-06-16 | 1989-06-16 | Combined protective device of color tv set and refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2049423U true CN2049423U (en) | 1989-12-13 |
Family
ID=4865293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89208639 Withdrawn CN2049423U (en) | 1989-06-16 | 1989-06-16 | Combined protective device of color tv set and refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2049423U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103840428A (en) * | 2012-11-26 | 2014-06-04 | 海洋王（东莞）照明科技有限公司 | Undervoltage protection circuit and lamp |
| CN104104065A (en) * | 2013-04-11 | 2014-10-15 | 海洋王（东莞）照明科技有限公司 | Battery voltage indication and protection circuit |
-
1989
- 1989-06-16 CN CN 89208639 patent/CN2049423U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103840428A (en) * | 2012-11-26 | 2014-06-04 | 海洋王（东莞）照明科技有限公司 | Undervoltage protection circuit and lamp |
| CN104104065A (en) * | 2013-04-11 | 2014-10-15 | 海洋王（东莞）照明科技有限公司 | Battery voltage indication and protection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |