CN2182373Y

CN2182373Y - Regulated protector for intelligent refrigerator

Info

Publication number: CN2182373Y
Application number: CN 94202206
Authority: CN
Inventors: 陈琼锴
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-01-22
Filing date: 1994-01-22
Publication date: 1994-11-09
Anticipated expiration: 2004-01-22

Abstract

The utility model provides a regulated protector for intelligent refrigerators. The utility model is characterized in that the circuit of the utility model is composed of an input circuit, a voltage transformation circuit, a voltage-stabilizing output circuit, a voltage-stabilizing circuit, a current sampling circuit, a voltage comparing circuit, a time delay (1) circuit, a time delay (2) circuit, a time delay (3) circuit, a fault judgment circuit, a counting circuit, a resetting circuit, a machine starting clear circuit, an overvoltage judgment circuit and an undervoltage judgment circuit. The regulated protector for the intelligent refrigerators of the utility model can realize automatic voltage regulation. When the utility model is positioned in the overvoltage and undervoltage conditions, the utility model can quickly cut off output power supply. The utility model has speech alarm. The utility model has the advantage of reliable stability.

Description

Regulated protector for intelligent refrigerator

The utility model is electronic regulation and the protective device that belongs to the electrical equipment working voltage.

In the existing various refrigerator voltage-stabilizing protection device; be by amplification that the variation of line voltage is taken a sample; control voltage stabilizing electrical equipment then and carry out the voltage stabilizing adjustment; when exceeding certain value, line voltage carries out overpressure protection; when reducing to certain value, voltage carries out under-voltage protection, the energising of when voltage cuts off the power supply and starts shooting, delaying time midway.But this all is to carry out below the good situation of electric water tank fault-free and startability; when refrigerator breaks down, especially in recent years during the short-circuit fault (damages or the like as compressor partial short-circuit, stuck, activation member); electric current will be heightened; thereby occur such as burn pressure regulator or protection device, for refrigerator, also can cause the frequent movement of overcurrent and overheating protection device even burn out compressor or make some belong to glitch originally further to enlarge.

The purpose of this utility model is to provide a kind of can carry out automatic Regulation, superpressure, the under-voltage protection and start shooting (or outage) when near in the protection; can also carry out the memory of the number of starts to the refrigerator that breaks down; and carry out fault and judge; when defining fault just with voice or audible alarm; and stop to refrigerator power supply, light malfunction indicator lamp, when superpressure occurring, also can point out a kind of like this intelligent refrigerator voltage-stabilizing protection of shutdown device.

The utility model is to realize like this.

Input electrical equipment links to each other with voltage transformation; Voltage transformation comprises transformer, lower pressure rectifier filtering voltage regulation electrical equipment, and its circuit links to each other with voltage stabilizing output, current sampling circuit, and controlled by mu balanced circuit; Output protection circuit links to each other with fault decision circuitry, counting circuit, the under-voltage decision circuitry of superpressure, time-delay (2) circuit, time-delay (3) circuit, current sampling circuit, voltage-stabilizing output circuit; The start clear circuit links to each other with time-delay (1) circuit, time-delay (2) circuit, time-delay (3) circuit, counting circuit; Voltage comparator circuit links to each other with time-delay (1) circuit, current sampling circuit; The fault decision circuitry links to each other with time-delay (1) circuit, counting circuit, output protection circuit; Counting circuit links to each other with the reset inhibit circuit of fault decision circuitry, output protection circuit, sound circuit, indicating fault, time-delay (2) circuit; Voltage sample circuit links to each other with mu balanced circuit, superpressure circuit, under-voltage decision circuitry.

Electronic pressure regulating protective device of the present utility model can be realized automatic Regulation; When superpressure (being higher than 260V), under-voltage (being lower than 160V), can cut off out-put supply rapidly, may cause the damage of this device and the further expansion of breakdown of refrigerator in the time of can also avoiding breaking down because of refrigerator, when there is fault in definite refrigerator or superpressure occurs, except that cutting off out-put supply, also can tell the refrigerator owner in the mode of language.This device working stability is reliable, can provide effective protection to refrigerator.

Fig. 1 is a functional-block diagram,

Fig. 2 is a circuit diagram.

Further describe below in conjunction with accompanying drawing

1, time-delay and start zero clearing: time-delay (1) is by R ₃, C ₂, IC _1-2Deng composition, J during owing to start just ₁Not adhesive, thus the output of no alternating voltage, B ₂Just the group no current passes through IC _1-12. pin, IC ₁-2 7. pin be low level.Time-delay (2) is by R ₇, C ₆, IC _1-3, BG ₁, R ₁₀, C ₇Deng composition, time-delay (3) is by R ₁₁, C ₈, IC _1-4, BG ₂, C ₉, R ₁₃Form.During start+12V voltage passes through R respectively ₁₀, C ₇, BG1 and R ₁₃, C ₉, BG ₂Force time-delay (2), time-delay (3) zero clearing, make time-delay accurately.

2, can not start or fault such as poor starting and refrigerator during when causing such as reasons such as dirty stifled, stuck, the partial short-circuits of compressor appears in refrigerator, flow through B in normal startup ₂Elementary electric current will heighten, and will make IC _1-12. pin becomes high level by low level, through R ₃, C ₂Time-delay (about 1.2～1.5 seconds) is to eliminate the influence that the normal startup of refrigerator causes.Enter normal operation (promptly starting failure for the first time) as failing at this time inner compressor to start, then by IC _1-21. the defeated voltage of bending of pin divides three tunnel outputs; The first via is connected to 1C ₄Carry out enabling counting, the second tunnel through R ₂₇Make BG ₃Conducting, BG ₄End J ₁Discharge, disconnect out-put supply, startup is stopped; Third Road is through R ₁₇, C ₉Send a pulse current to BG ₂Base stage makes its conducting, with C ₈The tele-release of being filled is fallen, IC _1-4(14) pin becomes low level, keeps BG ₄Cut-off state is at BG ₄When ending, its colelctor electrode saltus step is a high potential, through R ₁₄, C ₇Send a pulse current to BG ₁Base stage, BG ₁Conducting and with C ₆On the voltage that fills bleed off.After these two pulses, BG ₁, BG ₂End R ₁₁, R ₇Respectively to C ₈, C ₇Fill, because R ₇, C ₆Time constant (2-15) compares R ₁₁, C ₈Big nearly one times of time constant (6-8 branch), so after 6-8 minute time-delay, IC _1-4(14) pin at first transfers high level to, makes BG ₄Conducting, J ₁Adhesive begins refrigerator is carried out starting the second time, if IC after startup is spent several minutes normally, so _1-3(13) pin transfers high level to and through C ₅, R ₆Make IC ₄Counter resets, and changes normal duty over to.If start failure once more for the second time, then counter is counted (secondary), J again ₁Discharge ... so circulation, after starting failure for the third time, then there is fault in this device outage refrigerator, IC ₄The 10th pin becomes high level, and the first via is through R ₂₈Make BG ₃Lead, BG ₄End J ₁Discharge, cut off its source of output; The second the tunnel through R ₃₁Make BG ₆Lead, light malfunction indicator lamp LED ₂, Third Road deenergizes and sends out sound circuit, and loudspeaker is repeated: " please check your refrigerator ", or send fault alarm sound, and the prompting owner checks the reason that (or censorship) refrigerator can not start; The four the tunnel through R ₉Make BG ₁IC is forbidden in conducting _1-3Output is to counter IC ₄Send reset signal, and keep this state and take measures until the refrigerator owner.

3, in this device, IC _2-2, IC _2-3, BG ₅, BG ₆, J ₂, J ₃Deng forming mu balanced circuit, control B ₁Different taps reach the automatic Regulation purpose.IC _2-1And IC _2-4Deng being respectively superpressure, under-voltage protecting circuit, when superpressure (being higher than 260V) appears, under-voltage (being lower than 160V) all makes BG ₄End J ₁Discharge, cut off out-put supply equally, in overpressure protection, IC _2-12. the high level of pin output also will pass through R ₂₉Can send out sound circuit and make it say " too high the woulding you please of voltage shut down ", the prompting owner shuts down, treats that voltage recovers normally start again.Transfer W ₂Just automatic voltage regulating circuit, superpressure.Under-voltage protecting circuit mixes up simultaneously, makes debugging comparatively simple, convenient.

4, K ₂Be selector switch start-up time, aim at the refrigerator design that partly starts difficulty, be contained in the casing back.Time-delay is 1.2～1.5 seconds when (promptly 1.2 connecting) about being allocated to, and time-delay is 2～2.2 seconds when being allocated to the right (promptly 2.3 connecting), puts left position at ordinary times.

5, " speech IC " content speak single integrated circuit, reduction voltage circuit, can Power Generation Road.

6, luminous LED once ₁Be output indication, LED ₂For indicating fault, LED are the power supply indication.

Claims

1; a kind of intelligent refrigerator voltage-stabilizing protection device; it is characterized in that: its circuit theory is that input circuit links to each other with voltage conversion circuit; voltage conversion circuit also respectively with voltage-stabilizing output circuit; mu balanced circuit links to each other with current sampling circuit; voltage comparator circuit and current sampling circuit; time-delay (1) circuit links to each other; fault system deenergizing respectively with output protection circuit; counting circuit; time-delay (1) circuit; time-delay (3) circuit links to each other; reset circuit respectively with counting circuit; the start clear circuit; time-delay (2) circuit links to each other; the time-delay (2) circuit respectively with the reset inhibit circuit; the start clear circuit; output protection circuit links to each other; the time-delay (3) circuit respectively with counting circuit; output protection circuit; the start clear circuit links to each other; voltage sample circuit respectively with voltage stabilizing road road; superpressure; under-voltage decision circuitry links to each other; counting circuit respectively with the reset inhibit circuit; failure indicating circuit links to each other, output protection circuit respectively with current sampling circuit; voltage-stabilizing output circuit; the under-voltage decision circuitry of superpressure links to each other.

2, intelligent refrigerator voltage-stabilizing protection device according to claim 1 is characterized in that: time-delay (1) circuit is by R ₃, C ₂, IC _1-2Form; Time-delay (2) circuit is by R ₇, C ₆, IC ₁-3, BG ₁, R ₁₀, C ₇Form; Time-delay (3) circuit is by R ₁₁, C ₈, IC _1-4, BG ₂, C ₉, R ₁₃, form.

3, intelligent refrigerator voltage-stabilizing protection device according to claim 1, it is characterized in that: mu balanced circuit is by IC _2-2, IC _2-3, BG ₅, BG ₆, J ₂, J ₃Form.