CN2032298U - Automatic pressure-adjusting protector for refrigerator - Google Patents

Abstract

The utility model relates to an automatic pressure-adjusting protector for refrigerator, which is used for automatically adjusting and protecting the power supply pressure of the single-phase source of refrigerator, air-conditioner, etc. The automatic pressure-adjusting protector for refrigerator is the development of NO. 85200443 patent, according to the ministry standard of SG215-84 refrigerator. When the refrigerator works abnormally and goes beyond the ministry standard, the automatic pressure-adjusting protector for refrigerator can stop power supply automatically, delay to restore power supply and send out alarm and memory signal. The utility model has the functions of starting refrigerator by boosting pressure, adjusting the pressure automatically when the refrigerator is working and the electric pressure of commercial power is not conform to ministry standard and automatically cutting off the over pressure of the commercial power, so as to weaken no load current of the continuous power consumption. The utility model prevents electrical machine form burning out, prolongs the service life and provides reliable guaranty for safe operation and improvement of cooling quality.

Description

Refrigerator automatic Regulation protector

The utility model is used for refrigerator, the adjustment and the protection of single phase power supply hermetic compressor supply voltages such as air-conditioner.

The utility model is the development of No. 85200443 patent of China, and this patent has following circuit:

1, postpone to cut off the power supply circuits of hermetic compressor winding:

When the hermetic compressor operation irregularity; its overcurrent protection (hereinafter to be referred as this device) action;,, behind this device action secondary, cut off and power as protecting signal to 85200443 protector at this voltage that installs two ends to compressor through rectification, time-delay.

2, warning and delayed management circuit:

After cutting off power supply, send alarm signal, the delayed management circuit is started working, and treats that time-delay finishes to restore electricity again.

3, warning memory circuit:

Trigger controllable silicon after restoring electricity, send the memory signal continuously, can eliminate until pressing cancel key.

The utility model has also remedied its weak point and has been except that the characteristics that possessed this patent:

1, the protection signal of this patent system draws from the compressor event needs to connect RCA, and use will be felt inconvenience.

2, refrigerator cisco unity malfunction, the undesired main cause often of voltage, this patent can only be made demonstration to voltage but can not be adjusted.

The drawing explanation:

Accompanying drawing is a refrigerator automatic Regulation protector circuit diagram.

B among the figure ₁Be reactance transformer, N ₁N ₂N ₃Be its winding, B ₂Be transformer, N ₄N ₅N ₆Be its winding, B ₃Be transformer, V is an output voltage meter, D ₁-D ₁₂Be diode, BG ₁-BG ₃Be transistor, SCR ₁Be thyratron, GTO ₁-GTO ₄Be turn-off SCR.W ₁-W ₃Be potentiometer, K ₁AN ₁Be switch, R _1-17Be resistor, C _1-5Be capacitor, LED _1-3Be light emitting diode.J ₁-J ₇Be relay, J _1-1, J _2-1, J _2-2, J _3-1, J _4-1, J _4-2, J _5-1, J _6-1, J _6-2, J _7-1, J _7-2Be respectively relay J ₁-J ₇The contact, RM1 is an overpressure switch, BX ₁Be overcurrent lock.

The utility model has adopted following circuit:

1, current sampling postpones to cut off the power supply output circuit:

This circuit is with the SG of Ministry of Light Industry _215-84Household electric refrigerator standard 3510 regulations: during 32 ± 1 ℃ of startings of environment temperature, every energising once allows overcurrent protection tripping secondary.Be foundation.

As shown in the figure: when compressor current is unusual, reactance transformer B ₁Secondary N ₂Voltage raises and triggers GTO through rectification and voltage division ₁Conducting, LED ₁Sending reports to the police to give shows signal, through R ₄To C ₁C is worked as in charging ₁Voltage rises to BG ₁J during conducting voltage ₁Adhesive J _1-1Make J ₂Adhesive and self-sustaining, J _2-2Disconnect and cut off output.

2, the compressor operating automatic Regulation and the starting circuit of boosting:

SG215-84 household electric refrigerator standard 22C item regulation supply voltage scope is the 180-240 volt.

A, when compressor operating, B ₁Secondary N ₃Voltage commutation after trigger GTO ₂Conducting, J ₄Adhesive, J _4-1, J _4-2To directly export the pressure regulation state that switches to.J ₆Be lower voltage limit relay, J ₇Be upper voltage limit relay, J ₆J ₇All not adhesive is a pressure-increasning state, J ₆Adhesive J ₇Not adhesive is for directly to export without pressure regulation, J ₆J ₇All adhesive is the step-down state.

B, GTO ₂During the beginning conducting, J _5-1Connect BG ₃Time circuit, work as C ₅Voltage does not rise to BG ₃During conducting voltage, J ₅No matter not adhesive is city's voltage J how ₆J ₇All not adhesives, circuit is in pressure-increasning state, works as C ₅Voltage rises to BG ₃Conducting, J ₅Adhesive, J _5-1After the action, electric current is by R ₁₃Supply with J ₅Winding is kept adhesive, BG ₃Time circuit quits work, and finishes the starting process of boosting.

C, when civil power forces down in assigned voltage, GTO ₃, GTO ₄All not conductings, J ₆J ₇Not adhesive, power supply is through J _7-2And J _2-2, J _4-2, J _7-1, J _6-1, and J _6-2Give N ₄Winding is with magnetizing current, through N ₅Output after boosting.

D, when civil power voltage up to specification, J ₆Adhesive J ₇Not adhesive, power supply is through J _6-2And J _2-2, J _4-2, J _7-1, J _6-1, J _4-1Directly export without transformer.

E, when civil power is higher than assigned voltage, J ₆J ₇All the adhesive power supply is through J _6-2And J _2-2, J _4-2, J _7-1With J _7-2Supply with B ₂With magnetizing current, through N ₆Export after the step-down.

3, excess voltage protection:

When line voltage is too high, RM ₁Transfer to and be bordering on conducting state, BX by being bordering on state of insulation ₁Cut off the power supply because of overcurrent, stop to this protector and refrigerator power supply.

The utility model advantage:

1, easy for installation; do not need external signal line; also needn't do any change to refrigerator; as using common latch; anyone can both install and use; therefore can eliminate this protector and may produce dysgenic doubt to refrigerator, and the problem that refrigerator in the guarantee period is taken place is also unlikely so dispute on.

2, the shutdown time of refrigerator generally all is longer than operation time and the city's piezoelectric voltage time up to specification greater than incongruent time, thus the most of the time adjustable transformer do not work, so compare relative a large amount of unloaded electric currents of having saved with other pressure regulators.

Even 3, some refrigerator is under normal voltage condition, because electric motor starting power is apart from little, thus can not start smoothly, owing to taked the measure of starting of boosting, thereby be that starting moment is little Compressor smoothly starting provides possibility, therefore can prolong the life-span of refrigerator subelement and make refrigerated storage temperature more constant, improves the refrigeration quality.

4, break down owing to utility grid; the high voltage of abnormal sometimes; can cause damaging electricity consumption equipment in the short time; because refrigerator is the electricity consumption equipment that uses continuously; the possibility of damaging is just bigger; because the utility model has adopted excess voltage protection, thereby can prevent that this class is difficult to give the damage that anti-serious accident causes.

5, circuit is simple and reliable, the components and parts versatility is strong: such as GTO₁－GTO ₄Available transistor, switch pipe, thyratron, integrated circuit, voltage relay and electric current relay replace, BG₁－BG ₃Available thyratron, integrated circuit or the time relay replace, SCR₁Available transistor integrated circuit, relay replace B₁Available current converter, current transformer, resistor replace B₂Can be auto-transformer or inductance transformer, J₁－J ₇Available transistor, integrated circuit or contactless switch replace, RM₁Available piezo-resistance, discharge tube, voltage-stabiliser tube, thyratron, ignitron replace. BX₁Available protective tube, fuse. Automatic switch replaces. Thereby for mass production provides favourable condition.

Claims (9)

1, a kind of refrigerator automatic Regulation protector, it comprises mainly the warning be made up of R4, C1, J1, J2 and delayed management circuit and mainly by LED3, SCR ₁The warning memory circuit of forming is characterized in that:

First, current sampling postpones to cut off the power supply output circuit:

When compressor current is unusual, reactance transformer B ₁Secondary N ₂Voltage raises and triggers CTO through rectification and voltage division ₁Conducting, LED ₁Sending reports to the police to give shows signal, through R ₄To C ₁C is worked as in charging ₁Voltage rises to BG ₁J during conducting voltage ₁Adhesive J _1-1Make J ₂Adhesive and self-sustaining, J _2-2Disconnect and cut off output.

Second, compressor operating automatic Regulation and the starting circuit of boosting:

A, when compressor operating, B ₁Secondary N ₃Voltage commutation after trigger CTO ₂Conducting, J ₄Adhesive, J _4-1, J _4-2To directly export and switch to pressure regulation state, J ₆Be lower voltage limit relay, J ₇Be upper voltage limit relay, J ₆J ₇All not adhesive is a pressure-increasning state, J ₆Adhesive J ₇Not adhesive is for directly to export without pressure regulation, J ₆J ₇All adhesive is the step-down state,

B, GTO ₂During the beginning conducting, J _5-1Connect BG ₃Time circuit, work as C ₅Voltage does not rise to BG ₃During conducting voltage, J ₅Not adhesive, though city's voltage how, J ₆J ₇All not adhesives, circuit is in pressure-increasning state, works as C ₅Voltage rises to BG ₃Conducting, J ₅Adhesive, J _5-1After the action, electric current is by R ₁₃Supply with J ₅Winding is kept adhesive, BG ₃Time circuit quits work, and finishes the starting process of boosting,

C, when civil power forces down in assigned voltage, CTO ₃CTO ₄All not conductings, J ₆J ₇Not adhesive, power supply is through J _7-2And J _2-2, J _4-2, J _7-1, J _6-1With J _6-2Give N ₄Winding is with magnetizing current, through N ₅Output after boosting,

D, when civil power voltage up to specification, J ₆Adhesive J ₇Not adhesive, power supply is through J _6-2And J _2-2, J _4-2, J _7-1, J _6-1, J _4-1Directly export without transformer,

E, when civil power is higher than assigned voltage, J ₆J ₇All the adhesive power supply is through J _6-2And J _2-2, J _4-2, J _7-1With J _7-2Supply with B ₂With magnetizing current, through N ₆Export after the step-down,

The third, excess voltage protection:

When line voltage is too high, RM ₁Transfer to and be bordering on conducting state, BX by being bordering on state of insulation ₁Cut off the power supply because of overcurrent, stop to this protector and refrigerator power supply.

2,, it is characterized in that turn-off SCR GTO according to the protector of claim 1 ₁-GTO ₄Available transistor, switching tube, integrated circuit, thyratron, voltage relay, electric current relay replace.

3,, it is characterized in that transistor BG according to the protector of claim 1 ₁-BG ₃Available thyratron, integrated circuit, the time relay replace.

4,, it is characterized in that thyratron SCR according to the protector of claim 1 ₁Available transistor, controllable silicon, integrated circuit, relay replace.

5,, it is characterized in that reactance transformer B according to the protector of claim 1 ₁Can power pack, current transformer, resistor replace.

6,, it is characterized in that transformer B according to the protector of claim 1 ₂Available auto-transformer, inductance transformer replace.

7, according to the protector of claim 1, it is characterized in that relay J ₁-J ₇Available transistor, integrated circuit, noncontacting switch replace.

8,, it is characterized in that overpressure switch RM according to the protector of claim 1 ₁Available piezo-resistance, discharge tube, voltage-stabiliser tube, thyratron, ignitron replace.

9, according to the protector of claim 1, it is characterized in that overcurrent lock BX ₁Available protective tube, fuse, automatic switch replace.