CN2139747Y - New type comprehensive device for domestic electric appliances - Google Patents

Abstract

The utility model relates to a novel comprehensive device for domestic electric appliances, comprising a single-phase electric energy metering mechanism, a phase shift capacitor, a reactive compensation circuit for automatic reactive compensation and protection, an electric shock protection circuit, an overcurrent protection circuit and a power-off delay circuit; the reactive compensation circuit is composed of an integrated circuit and a semiconductor element. The utility model can obviously improve the power factor of a low-voltage electric network, can reduce wire loss, can improve the utilization rate of switching equipment, and can be used for replacing traditional single-phase watt-hour meters, electric shock protectors and refrigerator protectors.

Description

New type comprehensive device for domestic electric appliances

The utility model is about power device, and particularly the utility model of the novel integration unit of household electricity belongs to the power technology field.It is a kind ofly both can carry out imaginary power automatic compensation, can carry out the novel integration unit of household electricity of electricity consumption metering again.

For improving the utilance of power equipment, reduce line loss, energy savings, electric power system has adopted concentrates or the half reactive power compensation mode of concentrating.Though this compensation way can improve the utilance of transmission facility, reduce the loss of transmission line, little to the loss that reduces low voltage electric network with the utilance effect that improves controller switching equipment.Along with improving constantly of people life level, household electrical appliance (mostly being inductive load) are increasing, thereby domestic load is risen significantly.The result has not only increased the loss of low voltage electric network greatly, the utilance and the efficient of controller switching equipment have been reduced, influenced power quality (brownout), and the cross section of skyscraper distribution line can not meet the demands, the lead heating is serious, directly threatening the masses' the security of the lives and property, also bringing inconvenience simultaneously to people life.These all the power factor of low voltage electric network cross low causing.

Task of the present utility model is: provide a kind of household electricity novel integration unit, realize dispersed idle compensation automatically on the spot, both improved the power factor of low voltage electric network, solve the electricity consumption measurement problem simultaneously again.To reach the reduction line loss, improve the utilance of controller switching equipment, improve power quality, guarantee safety utilization of electric power, satisfy the order ground of people life needs.

Its solution is: the novel integration unit of household electricity adopts induction type single-phase electric energy metrological service (its principle is with common single-phase watt-hour meter), at its output one power transformer is arranged, and it provides working power for the compensation control loop.Phase shifting capacitor is adopted in reactive power compensation, and the compensation control loop is made up of semiconductor element.Its compensation way is: the idle situation of judging power supply according to the variation of line voltage, automatically (because in electrical network, voltage depends primarily on reactive power balance in the system, when idle deficiency to drop into suitable reactive power compensation amount, voltage will descend), to reach new combination.

Like this, utilize it not only can replace traditional single-phase watt-hour meter, and can also carry out reactive power compensation automatically, to guarantee the power factor in the electrical network.Thereby not only reduced line loss, improved the utilance of controller switching equipment, improved the quality of power supply, improved the fail safe and the reliability of skyscraper distribution line power supply, reduced requirement, satisfied the masses' living needs conductor cross-section.

Improvement of the present utility model is: for guaranteeing the personal safety in the electricity consumption, the utility model also is provided with the electrical shock protection circuit.

Further improvement of the utility model is: for guaranteeing the safety of power consumption equipment and device itself, the utility model also is provided with circuit overcurrent protection.

Further improvement of the utility model is: for guaranteeing the safety of household electrical appliance (especially refrigerator, air conditioner) when the transmission or not, the utility model also is provided with the outage delay circuit.

The utility model through after improving not only can replace single-phase watt-hour meter, also can replace family expenses earth leakage protector and refrigerator protector.Its excess current protective function had both been protected power consumption equipment simultaneously, had protected device itself again.

Accompanying drawing is circuit theory diagrams of the present utility model and face shaping schematic diagram.

Fig. 1 is a primary system schematic diagram of the present utility model, and by finding out among the figure, it is divided into: measurement loop, control power supply form loop, reactive power compensation loop, main control loop, electric shock detects the loop and overcurrent detects the loop.

Fig. 2 is an electrical secondary system schematic diagram of the present utility model, and by finding out among the figure, it is divided into: electrical shock protection loop, overcurrent protection loop, outage timing circuit and three grades of idle automatic switchover loops.

The course of work of circuit is:

Outage time-delay: when initially sending electricity, because of capacitance voltage can not suddenly change, so capacitor C ₁₁On voltage be zero, triode T ₁, T ₂End relay J ₂Dead electricity, its normally opened contact J _2-1Disconnect main relay J ₀Dead electricity, this device is in power down mode.At this moment, power supply passes through R ₂To C ₁₁Charging through about five minutes, is charged to T ₁Conducting voltage, T ₁, T ₂Conducting, relay J ₂Get electric adhesive, its normally opened contact J _2-1Closure, main relay J ₀Get electric adhesive, promptly this device send after time-delay.

When the person got an electric shock: the detection loop of getting an electric shock this moment was converted to voltage signal with detected zero-sequence current and gives highly sensitive earth leakage protective application-specific integrated circuit (ASIC) IC, triggers one-way SCR KG, relay J after IC handles ₁Get electric adhesive, its normally-closed contact J _1-1Disconnect main relay J ₀Dead electricity is returned, thereby has cut off power supply.

During the circuit overcurrent, when when circuit excess load or fault overcurrent taking place, the over-current detection loop is a voltage with detected current conversion, punctures voltage-stabiliser tube DW after rectification, filtering, triggers one-way SCR KG, relay J ₁Get electric adhesive, its normally-closed contact J _1-1Disconnect main relay J ₀Dead electricity is returned, thereby has cut off power supply.

Imaginary power automatic compensation: under the normal condition, the relay J in three grades of idle automatic switchover loops ₃, J ₄, J ₅Equal dead electricity, its normally-closed contact closure drops into three grades of reactive-load compensation capacitors.When line voltage be higher than rated value+10% the time, A point current potential rises in the circuit, makes T ₃Conducting, relay J ₃Get electric adhesive, its normally-closed contact J _3-1Disconnect excision first order building-out capacitor, its normally opened contact J simultaneously _3-2Closure drops into second level commutation circuit.At this moment, the then circuit stable operation in this case if line voltage descends.Otherwise, if line voltage does not fall, then through certain time-delay (capacitor C ₁₂Effect) after, B point current potential rises, T ₄Conducting, relay J ₄Get electric adhesive, its normally-closed contact J _4-1Disconnect excision second level building-out capacitor.While its normally opened contact J _4-2Closure drops into third level commutation circuit.Then circuit stable operation in this case this moment if line voltage descends.Otherwise, if line voltage does not fall, then through certain time-delay (capacitor C ₁₃Effect) after, C point current potential rises, T ₅Conducting, relay J ₅Get electric adhesive, its normally-closed contact J _5-1Disconnect excision third level building-out capacitor.When line voltage was lower than rated value, A point current potential descended, T ₃End relay J ₃Dead electricity is returned, and drops into first order building-out capacitor.Simultaneously, because the interlocking effect makes J ₄, J ₅Dead electricity is returned in succession, drops into second and third grade building-out capacitor.If line voltage rises once again, then repeat said process, until settling out at a suitable compensation point.

In the circuit, MYJ ₁, MYJ ₂Be the overvoltage protection piezo-resistance; Diode connected in parallel is the induced voltage bleed-off circuit on the relay, with protection controllable silicon and triode; W is the overcurrent potentiometer of adjusting; Normally closed button AN is the protective circuit reset button.Because of this protective circuit is designed to high locking form, promptly as long as protective circuit action, just must hand-reset, otherwise this device with locking in power down mode.

Fig. 3 is a face shaping schematic diagram of the present utility model, and it has described face shaping of the present utility model and layout.Among the figure: 1 is fixed hook, and 2 is integrator, and 3 for rotating the aluminium dish, and 4 is terminal box; 5 is binding post, and 6 close for wiring and to cover screw, and 7 close lid for wiring, and 8 are the hand-reset button; 9 is idle switching indication, and 10 are protection action indication, and 11 are the power supply indication, and 12 is shell.

The best way that the utility model is realized is: adopting common induction type single-phase electric energy metrological service, is 10 volts at step voltage of its output termination, and capacity is 1.5 volt-amperes a power transformer, for control loop provides working power.Control loop all designs on a printed circuit board, and adopts small-sized middle power relay (J ₀Can adopt the JTX-2 type, other can adopt the JRX-13 type); Triode does not have specific (special) requirements, as long as β＞120; KG should select micro-trigger controlled silicon such as CR02AM or CR03AM for use; It is the annular glass alloy sheet not of 0.2-0.3 millimeter that zero sequence current mutual inductor, the iron core of overcurrent instrument transformer can adopt thickness, the thick 3-5 millimeter that changes, and secondary encloses around 300-500 circle and 100-150 respectively with 0.1-0.15 millimeter enamelled wire; Electrochemical capacitor is withstand voltage should be greater than 25 volts; Resistance is 0.125 watt; Diode can adopt IN4001-4004; The conduction voltage drop of light-emitting diode should be not more than 1.6 volts; Phase shifting capacitor can be selected metallization oil-paper Jie's type (as CZJD) for use.Circuit board, shift capacitor all are fixed in the casing, and reset button, state indication light-emitting diode are fixed on the machine shell panel.The shell of integration unit can be suppressed the same single-phase watt-hour meter of its external cabling with general steel plate or ABS engineering plastics.

Claims (4)

1; a kind of electricity consumption integration unit; the novel integration unit of household electricity particularly; it is characterized in that: this device not only has induction type single-phase electric energy metrological service; also have by phase shifting capacitor; integrated circuit and semiconductor element are formed the reactive power compensation circuit that carries out imaginary power automatic compensation and protection; the electrical shock protection circuit; circuit overcurrent protection and outage delay circuit; entire circuit comprises power transformer; relay all is installed on the same printed circuit board, uses lead and power supply then; phase shifting capacitor; current transformer; reset button; light-emitting diode connects.

2, electricity consumption integration unit according to claim 1, it is characterized in that: it also is provided with the electrical shock protection circuit.

3, electricity consumption integration unit according to claim 1, it is characterized in that: it also is provided with circuit overcurrent protection.

4, electricity consumption integration unit according to claim 1, it is characterized in that: it also is provided with the outage delay circuit.

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