CN2126598Y - Double protective fully automatic voltage stabilizer for household electric appliance - Google Patents

Abstract

Disclosed is a double protective fully automatic voltage stabilizer for a household electric appliance, which is composed of an autotransformer, a voltage reducing transformer, a rectifying voltage stabilizing circuit, an automatic voltage stabilizing circuit, an over-voltage protective circuit, a time delaying protective circuit, etc., wherein, the automatic voltage stabilizing circuit is composed of a three-stage voltage increasing element circuit and a first-stage voltage reducing element circuit. When power supply varies, the automatic voltage stabilizing circuit controls a corresponding relay to work and automatically switches the five taps of the first coil of the autotransformer for achieving the purpose of voltage stabilizing output. When voltage reaches 260 volts, the over-voltage protective circuit acts and cuts off power supply. When the voltage on an outside line is normal, the utility model can automatically supply power supply.

Description

Double protective fully automatic voltage stabilizer for household electric appliance

The utility model relates to a kind of automatic protection and automatic voltage regulator of household electrical appliance.

Recently, all kinds of middle and high retaining household electrical appliance have spread to most families, along with electrical appliance increases, and the power supply capacity corresponding raising of failing again, therefore in peak of power consumption constantly, excessive voltage drop causes electrical appliance not start; After peak of power consumption, voltage gos up higher, and often surpass the limit working voltage of household electrical appliance the late into the night, makes the household electrical appliance temperature rise too high, shortens the serviceable life of household electrical appliance.

In addition, because various places user and substation transformer distance do not wait, thereby also difference of the lighting voltage that obtains of various places user.User's voltage of remote districts is on the low side, and user's voltage of closer distance is higher again.

The electrical appliance that causes for above-mentioned reasons is damaged, or the phenomenon that shortens electrical appliance serviceable life usually takes place, and people are increased to the protection consciousness of household electrical appliance with to the requirement of power supply quality thereupon.At present; the general design of the household electrical appliance of producing itself both at home and abroad has overvoltage crowbar; but its technical performance index is subjected to the restriction of himself cost again; can not become to be subjected to 380 volts superpotential; and all kinds of family expenses voltage stabilizers and the protector overwhelming majority also become can't stand 380 volts of voltages; though minority can satisfy the superpotential requirement; but the index Design that its voltage promotes is also unsatisfactory; voltage stabilized range is too narrow; and output power is little; be not suitable for the serious urban area of remote countryside and voltage drop and use, can not satisfy the easy needs that domestic lighting and multiple household electrical appliance use simultaneously.

The purpose of this utility model is to provide a kind of household electrical appliance protection and voltage stabilizer with characteristics such as overvoltage protection, short-circuit protection, delay protection, high-power output, the under-voltage expanded reach of automatic voltage regulation are wide.

The utility model is made up of autotransformer, step-down transformer and regulator rectifier circuit, automatic voltage regulation circuit, excess voltage protection, delay protection circuit etc.The first wire-wound group of above-mentioned autotransformer has five taps, and can pass through relay J ₁-J ₅The automatic switchover contact to adapt to different variation voltage respectively, provides stable output voltage to electrical appliance.Above-mentioned step-down transformation and regulator rectifier circuit provide working power for this device, can tolerate 380V voltage, to guarantee that this device 380V is with interior operate as normal; Above-mentioned step-down transformer also provides the supply voltage sampled signal for automatic voltage regulation circuit and overvoltage crowbar.Above-mentioned automatic voltage regulation circuit is that the element circuit of three grades of liftings and one-level step-down is formed, they are made up of potentiometer, voltage comparator, control triode and relay respectively, when mains voltage variations, voltage sampling signal changes, make the liter or the work of pressure unit circuit triggers of respective stages, corresponding relay work, the tap of the autotransformer that control is corresponding is switched, and makes it export stable voltage on request.When above-mentioned overvoltage crowbar surpasses 260 volts at voltage, control its relay work, its contact is serially connected in the autotransformer incoming line, thereby can cut off the electricity supply.

The utility model is (146V-260V) when mains voltage variations, adjusts automatically by level Four, makes output voltage stabilization about 220V, during when outside line voltage surpasses 260V or up to 380V, but this machine instantaneous trip power supply.After outside line voltage is normal again, get final product automatic recovery of power supply.The utility model also is provided with delay protection, can protect the freezer compressor system effectively, meets under the instantaneous power failure situation, send behind the electricity and must time-delay power to refrigerator in 5-8 minute again.

Fig. 1 is a schematic block circuit diagram of the present utility model.

Fig. 2 is circuit embodiments figure of the present utility model.

Fig. 3 is an outer casing frontispiece synoptic diagram of the present utility model.

Fig. 4 is a shell schematic rear view of the present utility model.

Embodiment of the present utility model sees Fig. 2, wherein T ₁Be autotransformer, its first wire-wound group has five taps, passes through relay J ₁-J ₅The automatic switchover contact, adapt to different change in voltage respectively, for electrical appliance provides regulated output voltage.T ₂Be step-down transformer, the control power supply of circuitry, D ₁, C ₁, C ₂With 7812 composition control circuits rectification, filtering and stable elements.D ₂, D ₃Be respectively sampling of voltage stabilizing controlling unit and superpotential control sample circuit.

The automatic voltage regulation circuit is by W ₁-W ₄, G ₁-G ₄, J ₁-J ₄, F ₁-F ₄, D ₁-D ₄, C ₅-C ₈And R ₂-R ₁₄Form.F ₁-F ₄Adopt a TC4011 integrated circuit, this integrated circuit is made up of the not circuit of 4 groups of 2 input ends, and input terminal voltage is 12 volts of direct currents.F ₁, F ₂, F ₃And F ₄Be respectively three grades and boost and the control element of one-level step-down, adjust W respectively ₁-W ₄Half adjustable resistance can make four groups of TC4011 to realize under different voltage condition that respectively output or no-output are arranged, and makes connected four 9013 triode G ₁-G ₄Realize conducting or end.Relay J ₁-J ₄Output contact corresponds respectively to transformer T ₁Tap voltage is 146V, 169V, 195V, 225V.When outside line voltage kept off inferior tap voltage above correspondence, corresponding relay is release just.When outside line voltage is lower than 146 volts, J ₁-J ₄All be in attracting state, J ₁Contact and 146 volts of taps connect back, external voltages via after one section winding promotes voltage between the 146-225 volt, export at 225 Fu Choutouchu.When outside line voltage is between 146 volts-169 volts, J ₁Discharge, its contact is upwards connected, and external voltage is via J ₂Contact and T ₁169 volts of contactings (this moment J ₁-J ₄State be adhesive) after external voltage boosts through one section winding, export at 225 Fu Choutouchu.The rest may be inferred for the principle of work of 169-195 volt and 225-260 volt.W ₁-W ₄Adjustment process be: regulate W ₁Make F ₁Output be added to G ₁Base stage be negative potential, G ₁End J ₁Discharge; Regulate W ₂, W ₃, W ₄Make J ₂, J ₃, J ₄In the time of 169 volts, 195 volts, 225 volts, discharge respectively.

Excess voltage protection is by W ₅, F ₅, J ₅, G ₅, D ₈, C ₉, R ₁₅, R ₁₆, R ₁₇Form.Regulate W ₅, make T ₅In the time of 260 volts, discharge.When external voltage surpasses 260 volts, T ₅Discharge its contact, back and connect neutral downwards, make transformer T ₁Power supply be cut off, and this moment T ₂Still have electricity, the control circuit operate as normal makes J ₁-J ₄Be in release conditions, guaranteed T ₁No-output voltage is realized the first heavy overvoltage protection.

The delay protection circuit is by F ₆, G ₆, D ₉, D ₁₀, D ₁₁, C ₁₀, C ₁₁, C ₁₂, R ₁₈, R ₁₉, R ₂₀, R ₂₁, AN forms.Change R ₁₉Class value, can adjust delay time.At R ₁₉Two ends AN in parallel, when special circumstances do not need this circuit delay, can be by AN with R ₁₉Short circuit makes this machine accessory power outlet CZ ₂(three) restore electricity fast.Timing relay J ₆The contact, control CZ ₂Voltage output, on this contact and be connected to time-delay indication amber lamp UXD and time-delay finishes indication greensignal light LXD.

F in the delay circuit and the first heavy overvoltage crowbar ₅, F ₆Adopt a TC4011 integrated circuit.

Above-mentioned step-down transformer T ₂, D ₁, C ₂, 7812 form the self-protection circuit can tolerate 380 volts voltages, when outside line voltage is between 260 volts-380 volts, owing to T ₂Tie in the self-protection characteristic of 7812 technical parameters designs, can for a long time anti-ly award 380 volts of voltages and can not cause component loss, voltage stabilizing link in the control circuit is exported still kept 12 volts, keep relay J ₅Release, the first heavy defencive function is kept.Above-mentioned characteristic constitutes the second heavy superpotential protection.

Claims (1)

1. A kind of household electrical appliance duplicate protection full-automatic voltage stabilizer; it is made up of autotransformer, step-down transformer and regulator rectifier circuit, automatic voltage regulation circuit, excess voltage protection, delay protection circuit; it is characterized in that: the first wire-wound group of autotransformer has five taps, passes through relay J ₁-J ₅The automatic switchover contact, to adapt to different change in voltage respectively, provide regulated output voltage to electrical appliance; Above-mentioned step-down transformation and regulator rectifier circuit provide working power for this device, provide the supply voltage sampled signal for automatic voltage regulation circuit and overvoltage crowbar simultaneously, and it is withstand voltage at 380V; Above-mentioned automatic voltage regulation circuit is three grades and boosts and the element circuit of one-level step-down is formed, they are made up of potentiometer, voltage comparator, control triode and relay respectively, when mains voltage variations, voltage sampling signal changes, the liter of respective stages or the work of pressure unit circuit triggers, make corresponding relay work, the tap of the autotransformer that control is corresponding is switched, and exports stable voltage.When above-mentioned overvoltage crowbar surpasses 260 volts at voltage, pilot relay work, this relay contact joining in the autotransformer incoming line, thereby can cut off the electricity supply.

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