CN204118684U - Computer, household electrical appliance intelligence complete shut-down cut-off protector - Google Patents

Abstract

Computer, household electrical appliance intelligence turn-off protection device, it relates to overvoltage protection and the power-failure protecting of computer and dangerous voltage cuts off civil power automatically and the automatic protector cutting off civil power that shuts down, and it is made up of power circuit 1, delay control circuit 2, self saving control circuit 3, sampling voltage circuit 4, overvoltage crowbar 5, auxiliary shutdown circuit 6; The voltage output end of power circuit 1 is connected with the voltage input end of delay control circuit 2; the voltage output end of delay control circuit 2 is connected with the control signal input of self saving control circuit 3; the control signal output of self saving control circuit 3 is connected with the input of sampling voltage circuit 4; the signal voltage output of sampling voltage circuit 4 is connected with auxiliary shutdown circuit 6 with the input of the control signal of overvoltage crowbar 5, and the input of the control signal of overvoltage crowbar 5 is connected with DC supply 1.

Description

Computer, household electrical appliance intelligence complete shut-down cut-off protector

Technical field:

The utility model relates to the overvoltage protection of computer and household electrical appliance and closes the automatically full cutoff device of electromechanical source, and especially can identify safety and dangerous voltage normal boot-strap or protect shutdown, computer and household electrical appliance normal shutdown cut off the protector of AC power automatically.

Background technology

Computer uses electrical equipment more widely at present, constantly declined, therefore be used by people to the intelligent tool as carrying out various application by ten its prices.This time this computer of application, household electrical appliance intelligence complete shut-down cut-off protector is the utility model patent obtaining State Patent Office and authorize for 2009: the computer intelligent complete shut-down protector with overvoltage protection, the patent No.: ZL200620104490.X, upgrade version, this patent is through actual fabrication, find some problems, larger through test adjustment difficulty, now two generation techniques have been released through improving, present application be exactly two generation techniques, this technology rights a wrong on the basis of former patent, this technology is made to become more ripe, the scope of application is larger, make again simple and easy, debug also simple, be applicable to batch production again.Also there are some problems in computer in the market and household electrical appliance, it is mainly manifested in protection: can not automatically cut off complete machine AC power when (1) electrical network overvoltage or thunderbolt overvoltage.(2) power failure or shutdown can only cut off computer and Domestic electric appliances power source, and automatically can not cut off complete machine AC power, energy-conservation not.Do not have overvoltage protection, thunderbolt and grid power blackout or computer and household electrical appliance shutdown automatically can not cut off the deficiency of AC power to overcome existing computer and household electrical appliance; the utility model provides a kind of protector; this protector can not only disconnect AC power in time when electrical network overvoltage or thunderbolt overvoltage, and can automatically cut off complete machine AC power when grid power blackout and computer and household electrical appliance normal shutdown easily.

Utility model content:

The utility model solves the technical scheme that its technical problem adopts: it is made up of power circuit 1, delay control circuit 2, self saving control circuit 3, sampling voltage circuit 4, overvoltage crowbar 5, auxiliary shutdown circuit 6, the voltage output end of power circuit 1 is connected with the voltage input end of delay control circuit 2, the voltage output end of delay control circuit 2 is connected with the control signal input of self saving control circuit 3, the control signal output of self saving control circuit 3 is connected with the input of sampling voltage circuit 4, the signal voltage output of sampling voltage circuit 4 is connected with the input of the input of the control signal of overvoltage crowbar 5 with auxiliary shutdown circuit 6 signal, the input of the control signal of overvoltage crowbar 5 is connected with the voltage output end of DC supply 1, the utility model beneficial effect is as follows: overvoltage protection and power-failure protecting complete closedown, AC power all can normally work when 190-250 lies prostrate range, overvoltage protective system adopts not to be needed to change fuse circuit, electrical network overvoltage then cannot be started shooting, again start shooting after voltage is normal, as unexpected power failure, can automatically cut off the connection with AC power, if send a telegram here again, if again do not started shooting, computer and household electrical appliance can not work again. and computer normal shutdown only need be clicked the mouse gently and just can automatically be cut off complete machine AC power. and personnel can leave, urban electric power switch is turned off without the need to waiting for, reach energy efficient, use safer, this protector has automatically, control simple, intelligent, make easily.

Accompanying drawing illustrates:

Fig. 1 is overall structure schematic block diagram of the present utility model, and Fig. 2 is protector electrical block diagram.

Embodiment:

As shown in Figure 1, this embodiment is by power circuit 1, delay control circuit 2, self saving control circuit 3, sampling voltage circuit 4, overvoltage crowbar 5, auxiliary shutdown circuit 6 forms: the voltage output end of power circuit 1 is connected with the voltage input end of delay control circuit 2, the voltage output end of delay control circuit 2 is connected with the control signal input of self saving control circuit 3, the control signal output of self saving control circuit 3 is connected with the input of sampling voltage circuit 4, the signal voltage output of sampling voltage circuit 4 is connected with the input of the input of the control signal of overvoltage crowbar 5 with auxiliary shutdown circuit 6 signal, the input of the control signal of overvoltage crowbar 5 is connected with the voltage output end of DC supply 1, as shown in Figure 2, described protector circuit by eight resistance R1-R8, three electric capacity C1-C3, potentiometer W, digital voltage Table V, four diode D1-D4, four triode T1-T4, time-base circuit IC1, a comparison circuit IC2, a relay J 0, touch-switch K, voltage-stabiliser tube DW, one doubles as the light-emitting diode DEL of indicator light, power transformer B1, a sampling transformer B2 forms, time-base circuit IC1 selects NE555 model, and comparator IC2 selects LM358 model, and triode T1, T4 select C1815 model, and T2, T3 select A1015 model.Two inputs of alternating current 220V respectively with digital voltage Table V, the two ends of touch-switch K and two of relay J o normally opened contact Jo1, the two ends that J02 and transformer B1 is elementary, the two ends of sampling transformer B2 are connected, the secondary two ends of transformer B1 and diode D2, the anode of D3 is connected, the centre tap ground connection of transformer B1, diode D2, the negative pole of D3 and electric capacity C2 positive pole, the positive pole of C3 and 4 pin of IC1, 8 pin, the emitter of triode T2, the collector electrode of T4, 4 pin of comparator IC2, one end of potentiometer W, resistance R7, one end of R8 is connected, the negative pole of electric capacity C3 and 2 pin of delay circuit IC1, 6 pin, one end of resistance R5 is connected, the other end ground connection of resistance R5, the 1 pin ground connection of time-base circuit IC1, 3 pin of time-base circuit IC1 respectively with resistance R3, R4 with one end be connected, the other end of resistance R3 is connected with one end of the base stage of triode T2, one end of resistance R4 is connected with the collector electrode of triode T1, the collector electrode of triode T2 is connected with the emitter of triode T3, the collector electrode of triode T3 and the negative pole of diode D4, one end parallel connection of relay J 0 is connected, the other end of relay J 0 and the positive pole earth of diode D4, the base stage of triode T3 is connected with the positive pole of a luminous pole pipe LDE, luminous two negative poles pulling pipe LDE are connected with one end of resistance R6, the other end of resistance R6 is connected with output 1 pin of comparator IC2, end of oppisite phase 2 pin of comparator IC2 is connected with one end of resistance R8 with the negative pole of voltage-stabiliser tube DW, compare clamor 4 pin of IC2 and the positive pole earth of voltage-stabiliser tube Dw, in-phase end 3 pin of comparator IC2 is connected with one end of potentiometer, the other end ground connection of potentiometer W, triode T4 emitter connects 3 pin of IC2, triode T1 collector electrode is connected with one end of resistance R4, the grounded emitter of triode T1, the base stage of triode T1 and resistance R1, one end of R2 is connected, the other end ground connection of resistance R2, the other end of resistance R1 and the positive pole of electric capacity C1, the negative pole of diode D1 is connected, the minus earth of electric capacity C1, one end of positive pole and sampling pressure changeable device B2 the level of diode D1 is connected, the other end ground connection of transformer B2, the selection of main devices: comparator adopts LM358, the operational amplifier of its built-in 2 groups of identical function, this circuit one group of operational amplifier wherein.Main feature is as follows: (1) can use 3-30 to lie prostrate the single supply work of wide region, also ± the power work of 1.5-± 15 volt can be used, (2) current sinking is little, about 0.8 milliampere, and have nothing to do with the supply voltage of use, (3) voltage gain height about 100DB, (4) input common mode voltage can to connecing low electricity, and IC inside keeps frequency compensated circuit.(6) protective circuit of IC own additional outputs short circuit short circuit.

Operation principle:

As shown in Figure 2, form decompression rectifier filter circuit by transformer B1, D2, D3, C2, AC power exports 12v direct-current working volts after rectification, is whole circuit supply.Form delay control circuit by IC1, C3, R5, T2, form overvoltage crowbar by IC2, T3, T4, R6, R7, R8, W, DW, DEL, formed holding circuit by T1.R1.R2, R4, formed voltage sample circuit by B2, D1, C1.The delay control circuit work be made up of time-base circuit IC1 (NE555) and peripheral cell after pressing power supply touch-switch K, 3 pin output low level triode T2 (A1015) conductings of time-base circuit IC1 (NE555), because AC supply voltage is normal, overvoltage crowbar is failure to actuate, the 1 pin output low level of comparator IC2 (LM358), LED is bright, triode T3 (A1015) conducting, its normally opened contact of relay J o adhesive J01, J02 closes, computer and household electrical appliance obtain electric, time of delay is about 1-5 minute, if computer and household electrical appliance are not started shooting and automatically will be disconnected AC power at this moment, if at this moment in computer and household electrical appliance in running order time, sampling transformer B2 is elementary has electric current to pass through, the sampling voltage of secondary induction is through diode D1, export control voltage after electric capacity C1 rectifying and wave-filtering and make three plate pipe T1 (C1815) conductings, adhesive is continued like this when triode T2 (A1015) still can maintain relay J o after cut-off in 1-5 minute, guarantee that computer and household electrical appliance can normally work, when computer and household electrical appliance shutdown, the voltage of sampling transformer B2 secondary induction is low, be not enough to make triode T1 (C1815) conducting, circuit can not self-insurance, its contact of relay J 0 J01, J02 disconnects, computer and household electrical appliance complete machine complete shut-down are cut off market electricity, reach energy-conservation and the object of protection computer and household electrical appliance.When AC supply voltage reaches 260V or thunderbolt; the operating voltage of circuit will raise; the 3 pin voltages of comparator IC2 (LM358) will raise. and cause comparator IC2 (LM358) 1 pin to export high level; triode T3 (A1015) becomes cut-off from conducting; its contact of relay J 0 dead electricity J01, J02 disconnect; computer and household electrical appliance complete machine complete shut-down are cut off market electricity, reach the object of overvoltage protection.Adopt above circuit effectively can solve the following problem of current computer and household electrical appliance existence: when (1) electrical network overvoltage or thunderbolt overvoltage, can not automatically cut off complete machine AC power.(2) to have a power failure or shutdown can only be cut off computer and Domestic electric appliances power source and can not automatically cut off complete machine AC power.

Claims (2)

1. computer, household electrical appliance intelligence complete shut-down cut-off protector, it is made up of power circuit (1), delay control circuit (2), self saving control circuit (3), sampling voltage circuit (4), overvoltage crowbar (5), auxiliary shutdown circuit (6), the voltage output end of power circuit (1) is connected with the voltage input end of delay control circuit (2), the voltage output end of delay control circuit (2) is connected with the control signal input of self saving control circuit (3), the control signal output of self saving control circuit (3) is connected with the input of sampling voltage circuit (4), the signal voltage output of sampling voltage circuit (4) is connected with the input of auxiliary shutdown circuit (6) signal with the input of the control signal of overvoltage crowbar (5), the input of the control signal of overvoltage crowbar (5) is connected with the voltage output end of DC supply (1).

2. computer according to claim 1, household electrical appliance intelligence complete shut-down cut-off protector, is characterized in that it is made up of eight resistance R1-R8, three electric capacity C1-C3, four diode D1-D4, four triode T1-T4, time-base circuit NE555, comparison circuit LM358, digital voltage Table V, relay J 0, touch-switch K, variable resistor W, voltage-stabiliser tube DW, the light-emitting diode DEL doubling as indicator light, power supply transformation depressor B1, sampling transformer B2, two inputs of alternating current 220V respectively with digital voltage Table V, the two ends of touch-switch K and two normally opened contact Jo1 of relay J 0, J02 two ends elementary with transformer B1 are connected, the secondary two ends of transformer B1 and diode D1, the anode of D2 is connected, the secondary centre tap ground connection of transformer B1, diode D1, the negative pole of D2 and electric capacity c2, the positive pole of C3 and 4 pin of time-base circuit IC1, 8 pin, the emitter of triode T2, the collector electrode of triode T4, 8 pin of comparator IC2, one end of variable resistor W, resistance R7, one end of R8 is connected, the minus earth of electric capacity C2, the negative pole of electric capacity C3 and 2 pin of time-base circuit IC1, 6 pin, one end of resistance R5 is connected, the other end ground connection of resistance R5, 1 ground connection of time-base circuit IC1, 3 pin of time-base circuit IC1 and resistance R3, one end of R4 is connected, resistance R3, the another end of R4 is connected with one end of the base stage of triode T2, the collector electrode of triode T3 is connected with the emitter of triode T2, the collector electrode of triode T3 and one end of relay J 0, the negative pole of diode D4 is connected, the other end of relay J 0, positive pole one end earth of diode D4, the base stage of triode T3 is connected with the positive pole of light-emitting diode DEL, the negative pole of light-emitting diode DEL is connected with one end of resistance R6, the other end of resistance R6 is connected with output 1 pin of comparator IC2, end of oppisite phase 2 pin of comparator IC2 is connected with one end of resistance R8 with the negative pole of voltage-stabiliser tube DW, 4 pin of comparator IC2 and the plus earth of voltage-stabiliser tube DW, in-phase end 3 pin comparing the IC2 that clamors is connected with the centre tap of variable resistor W, the other end ground connection of variable resistor W, triode T1 collector electrode is connected with one end of resistance R4, the grounded emitter of triode T1, the base stage of triode T1 and resistance R1, one end of R2 is connected, the other end ground connection of resistance R2, the another end of resistance R1 and the positive pole of electric capacity c1 are connected, the negative pole of diode D1 is connected, electric capacity c1 minus earth, the positive pole of diode D1 and secondary one end of sampling transformer B2 are connected, the other end ground connection of sampling transformer B2, two normally opened contact J01 of the relay J 0 at the elementary two ends by computer and touch-switch K of sampling transformer B2, J02 and the elementary two ends of transformer B1 are connected.