CN2119038U - Automatic electric break protector for domestic electric appliance - Google Patents
Automatic electric break protector for domestic electric appliance Download PDFInfo
- Publication number
- CN2119038U CN2119038U CN 92207731 CN92207731U CN2119038U CN 2119038 U CN2119038 U CN 2119038U CN 92207731 CN92207731 CN 92207731 CN 92207731 U CN92207731 U CN 92207731U CN 2119038 U CN2119038 U CN 2119038U
- Authority
- CN
- China
- Prior art keywords
- circuit
- capacitor
- power supply
- voltage
- power
- 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.)
- Granted
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to an automatic electric break protector for domestic electric appliance, comprising a checking circuit, a filtering circuit, an alternate current enlarge circuit, a voltage doubling wave detection circuit, a power amplification circuit, a load circuit, a voltage regulate power supply circuit and an over-voltage protective circuit. When the load (electric apparatus) remotely controls the shutdown, owing to the lightened load, the output terminal of a current mutual inductor is only provided with a small sampling voltage signal. Through the filtering circuit, the enlarge circuit and the voltage doubling detecting circuit, no sufficient positive voltage is provided, the capacitance can cause a transistor cutting off via the resistor delaying electric discharging. So the relay losses pressure, a normally open contact point can release and cut off the power supply for cause the load (electric apparatus) and the protector switching off, and the power supply can be completely switched off. The utility model has the advantages of stable performance, safe and reliable use, low cost and long service life and is suitable for being used on various domestic appliances such as color televisions and video tape recorders for protecting and electricity saving.
Description
The utility model relates to the automatic power-off protector of a kind of automatic safety device household electrical appliance.Be mainly used in various household electrical appliance or electrical equipment, suitable especially colour TV, video tape recorder etc. are made protector and are used.
Now Chang Yong household electrical appliance mostly be manually, remote control or automatically shutdown, but still have partial circuit still in energising work in the electrical equipment of shutdown back.As behind the commercially available colour TV remote-control closedown just TV image disappear, remote control receiving unit and power unit are still in work, long-term energising not only influences useful life but also waste electric energy, also can be struck by lightning or power circuit in superpotential infringement.For avoiding the long-term energising of electrical equipment to reach for safety, must pull out attaching plug, so frequent plug attaching plug brings inconvenience to people's life.
Number of patent application 91205154.X " electrical equipment lengthen the life automatic switch " provides solution with regard to above-mentioned inconvenience, but the no anti-interference function of its device, reliability is also not high, can't accomplish real whole cutting off the electricity supply, because of stabilized voltage power supply is not cut off the power supply.
The purpose of this utility model is to provide a kind of household electrical appliance automatic power-off protector; can all cut off the electricity supply automatically; prevent that household electrical appliance shutdown back is because of electrical appliance part circuit and this protector various accidents of causing of the work of switching on still; its circuit is simple, cost is low, dependable performance, for people's life provides convenience.
The utility model is achieved in that by testing circuit, ac amplifier circuit, power amplification circuit, load circuit to be formed; also comprise filter circuit, multiplication of voltage detecting circuit, stabilized voltage power supply, overvoltage crowbar; the High-frequency Interference that can remove in the supply line makes this protector working stability reliable; really reach and to pull out attaching plug, as long as whole purpose of power cutoffs just behind the remote-control closedown.
Fig. 1. circuit block diagram of the present utility model.
Fig. 2. electric circuit diagram of the present utility model.
Below in conjunction with accompanying drawing embodiment of the present utility model is further described.
V
13, V
16, V
17, be 3DG type triode, V
11, V
12, V
14, V
15Be 2CK type diode, V
21～V
24Be 2CP type diode.
C
11, C
12Electric capacity is 0.047 μ/16V, C
13, C
14Electric capacity is 4.7 μ/16V, C
13Electric capacity is 10 μ/16V, C
21Electric capacity is 1 μ/400V, C
22Electric capacity is 220 μ/16V, V
25Be the voltage-stabiliser tube of 12V, relay J is the 12V miniature relay, and button AN is that small-sized duplex is often driven button.
Resistance R
1147K Ω, R
12100 Ω, R
134.7K Ω, R
14220K Ω, R
21200K Ω 1/4W.
Civil power meets the normally opened contact J that duplex is often driven button AN and relay by fuse
1, J
2End after the parallel connection, termination capacitor C in addition
21With resistance R
21An end in parallel connects the household electrical appliance supply socket simultaneously, and capacitor C
21With resistance R
21Another termination V in parallel
21～V
24The bridge rectifier of forming, capacitor C
22, voltage stabilizing didoe V
25The stable low-voltage DC of two end filtering, voltage stabilizing, output that is attempted by DC power supply E is respectively formed voltage-stabilized power supply circuit, and piezo-resistance Rv is connected in parallel on household electrical appliance power pluging seat composition overvoltage crowbar.
The former limit of TA current transformer is serially connected in the mains-supplied circuit, and secondary also connects filter circuit composition testing circuit.Capacitor C
11Series resistance R
11After again with C
12Compose in parallel π type filter circuit.Output serial connection coupling capacitance C
13, capacitor C
13The other end be connected to the diode V of reverse parallel connection
11, V
12And triode V
13Base stage, base electrode bias resistance R
12Be attempted by triode V
13Base stage and collector electrode, resistance R
13One terminates at V
13Collector electrode on, termination power E positive pole in addition, triode V
13Emitter and current transformer TA, capacitor C
11, C
12An end be that the negative pole of power supply E is connected to form ac amplifier circuit.Pass through capacitor C again
14With diode V
14Negative pole, V
15Positive pole link to each other V
14Positive pole connect power supply E negative pole and form the multiplication of voltage detecting circuit.Capacitor C
15With resistance R
14Meet diode V after the parallel connection
15Negative pole and by triode V
16, V
17The base stage of forming multiple tube links to each other, and end links to each other with the emitter of multiple tube and connects the negative pole composition power amplification circuit of power supply E in addition.
Light-emitting diode V
18Negative pole meet V
16, V
17The collector electrode of multiple tube, positive pole are succeeded an end of electrical equipment J coil, and coil is the anodal load circuit of forming of termination power E in addition.
After pressing AN duplex push-button switch with hand during use, civil power is connected by button AN, alternating current through voltage-stabilized power supply circuit step-down, rectification, filtering and voltage stabilizing output low-voltage DC to capacitor C
15Quick charge is when voltage rises to triode V
16, V
17During cut-in voltage, triode conducting, relay J action, normally opened contact J
1, J
2Connect, the mains supply self-locking makes this protector energising work.If by bringing onto load (electrical equipment) enough big power is arranged, current transformer TA output has enough sampling voltage signals, through filter circuit, ac amplifier circuit, multiplication of voltage detecting circuit enough positive voltages is arranged, and makes triode V
16, V
17Remain on conducting state, relay J self-locking, but just normal power-up work of electrical equipment always.
When load (electrical equipment) remote-control closedown or after manually shutting down, because load reduction current transformer output has only the smaller sampling voltage signal, no enough positive voltages behind filter circuit, ac amplifier circuit, multiplication of voltage detecting circuit, capacitor C
15Through resistance R
14After the time-delay discharge, make triode V
16, V
17End, the relay J decompression, normally opened contact discharges.
Cut off the electricity supply and make load (electrical equipment) and the outage of this protector, V
18Light-emitting diode does not have indication; play the effect of complete power cutoff, particularly when electrical equipment is worked, grid power blackout, outage, incoming call energising again; only otherwise go to press push-button switch electrical equipment energized automatically, play the effect that safety, protection are economized on electricity.
If select suitable current instrument transformer TA and triode V
13Multiplication factor β with regard to the different various electrical equipment of controllable size.
The utility model is compared with prior art: because filter circuit is arranged, and the voltage-stabilized power supply circuit, the multiplication of voltage detecting circuit just can be eliminated the various High-frequency Interference signals in the supply line, makes protector misoperation can not occur, thereby has improved reliability and the security of protector. Stability is good, and it is the reliable apparatus of various household electrical appliance or electrical equipment electricity-saving protection that long service life, cost hang down, and because overvoltage crowbar is arranged, overvoltage absorbs through piezo-resistance Rv eliminates overvoltage, and the protection household electrical appliance exempt from damage. In addition when household electrical appliance behind this protector auto-breaking, make the also fully outage of this protector, accomplish not work, not power consumption, play economize on electricity, safeguard protection effect.
This protector circuit structure is simple, safety, reliability height, stability is good, the life-span long, cost is low is the reliable apparatus of various electrical equipment economize on electricitys, protection.
Claims (1)
1, the automatic power-off protector of a kind of household electrical appliance is made up of testing circuit, ac amplifier circuit, power amplification circuit, load circuit, it is characterized in that also comprising that civil power meets the normally opened contact J that duplex is often driven button AN and relay by fuse
1, J
2End after the parallel connection, termination capacitor C in addition
21With resistance R
21An end in parallel connects the household electrical appliance supply socket simultaneously, and capacitor C
21With resistance R
21Another termination V in parallel
21～V
24The bridge rectifier of forming, capacitor C
22, voltage stabilizing didoe V
25Voltage-stabilized power supply circuit is formed at the two ends that are connected on DC power supply E, and piezo-resistance Rv is connected in parallel on the household electrical appliance power pluging seat and forms overvoltage crowbar, capacitor C
11Series resistance R
11After again with capacitor C
12Compose in parallel filter circuit, capacitor C
14With diode V
14Negative pole, V
15Positive pole link to each other V
14The positive pole negative pole that meets power supply E form the multiplication of voltage detecting circuit, and the former limit of current transformer TA is serially connected in the mains-supplied circuit, secondary connects filter circuit and forms testing circuit, filter circuit output serial connection coupling capacitor C
13, capacitor C
13The other end be connected to the diode V of reverse parallel connection
11, V
12And triode V
13Base stage, base electrode bias resistance R
12Be attempted by triode V
13Base stage and collector electrode, resistance R
3One terminates at V
13Collector electrode on, the positive pole of termination power E in addition, triode V
13Emitter and current transformer TA, capacitor C
11, capacitor C
12An end be that the negative pole of power supply E is connected to form ac amplifier circuit, by multiplication of voltage detecting circuit, capacitor C
15With resistance R
14Meet diode V after the parallel connection
15Negative pole and by triode V
16, V
17The base stage of forming multiple tube links to each other, and end links to each other with the emitter of multiple tube and connects the negative pole composition power amplification circuit of power supply E, light-emitting diode V in addition
18Negative pole meet V
16, V
17The collector electrode of multiple tube, positive pole are succeeded an end of electrical equipment J coil, and coil is the anodal load circuit of forming of termination power E in addition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92207731 CN2119038U (en) | 1992-04-18 | 1992-04-18 | Automatic electric break protector for domestic electric appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92207731 CN2119038U (en) | 1992-04-18 | 1992-04-18 | Automatic electric break protector for domestic electric appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2119038U true CN2119038U (en) | 1992-10-14 |
Family
ID=4953383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92207731 Granted CN2119038U (en) | 1992-04-18 | 1992-04-18 | Automatic electric break protector for domestic electric appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2119038U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100362359C (en) * | 2001-12-21 | 2008-01-16 | Bsh博施及西门子家用器具有限公司 | Method for checking the electrical safety of a household appliance, and corresponding household appliance |
-
1992
- 1992-04-18 CN CN 92207731 patent/CN2119038U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100362359C (en) * | 2001-12-21 | 2008-01-16 | Bsh博施及西门子家用器具有限公司 | Method for checking the electrical safety of a household appliance, and corresponding household appliance |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2135845Y (en) | Full switching off and over voltage protective power socket for remote electric appliance | |
| CN2119038U (en) | Automatic electric break protector for domestic electric appliance | |
| CN2446654Y (en) | Household appliance standby power saver | |
| CN2131233Y (en) | Remote-controlled integrated auto-breaking protector | |
| CN2217853Y (en) | Intelligent monitoring stablizing protector for ac. electric power supply | |
| CN201210560Y (en) | Multifunctional energy saving socket | |
| CN2162057Y (en) | Automatic power-off protector for colour TV set with remote-control device | |
| CN201118192Y (en) | Controller for limiting power utilization | |
| CN205304215U (en) | Contactor protection control circuit and air conditioning equipment | |
| CN2424552Y (en) | Special socket for computer | |
| CN2248933Y (en) | Eenergy-saving and safety socket for house-hold electric appliance | |
| CN2805142Y (en) | Socket used specially for TV set | |
| CN2262116Y (en) | Vacuum control box of oil pumping machine | |
| CN2167492Y (en) | Remote control device for colour TV sets for turning off power supply when switched out | |
| CN2178957Y (en) | Safety device for electrical equipment of household | |
| CN2332084Y (en) | Power socket with anti-interference and lightning protection | |
| CN2415502Y (en) | Power protection socket with timer | |
| CN2269017Y (en) | Phase-off protector for three phase motor | |
| CN2121776U (en) | Automatic cut-off protector of tele controlling television | |
| CN2140577Y (en) | Intelligent energy saving protector for electric motor | |
| CN2301805Y (en) | Electric load rated safety automatic controller | |
| CN2364583Y (en) | Socket with monitor type automatic on-off supply unit | |
| CN2165552Y (en) | Multifunctional remote-controlled all-shutdown controller for household electric appliances | |
| CN2137831Y (en) | Telecontrol fully-automatic protection device for switch-off of domestic electric appliance | |
| CN2257424Y (en) | Telecontrol colour TV protector |
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 |