CN208623332U - A kind of refrigerator power-off protector - Google Patents

Abstract

The utility model discloses a kind of refrigerator power-off protector, including shell and setting control circuit inside housings, it is embedded power supply leading-in end and power outlet in surface of shell.Control circuit includes trigger circuit, main control loop and timing circuit.Trigger circuit is to trigger governor circuit, and conducting and disconnection of the main control loop to control power supply leading-in end and power outlet, timing circuit is to realize delays time to control.The utility model is with the function of powering to refrigerator that when sending a telegram here immediately after power is turned off, is delayed.With protection freezer compressor, extend the beneficial effect of refrigerator physical life.

Description

A kind of refrigerator power-off protector

Technical field

The utility model relates to the protective devices in household appliance technical field, and in particular to a kind of refrigerator power-off protector.

Background technique

Refrigerator is the home electric of each family's indispensability, due to the special tectonic of refrigerator, results in refrigerator and pounds after power-off not Power transmission it can restart immediately.The reason for this is that: if machine powers off during operation, this is machine channel interior there are pressure difference, I.e. condenser is in high pressure conditions, and at this moment compressor cannot start under exhaust outlet high pressure conditions, if starting can be to pressure Contracting machine damages, it is therefore necessary to loine pressure balance or it is relatively small when start, it is therefore desirable to a time course makes Pressure difference restores balance state.Although the supply of present electric power has had reached very reliable state, power failure is still It may occur, cause to power off, and the protective relaying device of electric system has reclosing function, can automatically reply confession after a loss of power Electricity.Therefore need to guarantee refrigerator after power is turned off, including accident power-off, artificial power-off, it cannot power transmission immediately.Because of the invention one Kind refrigerator power-off protector becomes a kind of urgent requirement.

Summary of the invention

The technical problem to be solved by the present invention is will not a kind of refrigerator power-off of power transmission immediately after providing a kind of guarantee power-off Protector.

The technical solution of the technical problem to be solved in the present invention is:

A kind of refrigerator power-off protector, including shell, it is characterised in that: further include power supply leading-in end, power outlet and Control circuit, the control circuit include power module, low-voltage direct bus, trigger circuit, main control loop, timing circuit, institute Input terminal and the electrical connection of power supply leading-in end, the output end and low-voltage direct bus of the power module for stating power module are electrical Connection, the low-voltage direct bus include positive and negative two conducting wires, the trigger circuit include light emitting diode, photodiode, The positive and negative anodes of low-voltage direct bus are attempted by after first relay, energy-storage module, the light emitting diode and energy-storage module series connection Between, it is attempted by between the positive and negative anodes of DC bus after the photodiode and the first relay coil windings in series, it is described The light-receiving surface of photodiode and the light-emitting surface of light emitting diode are opposite, and the main control loop includes the second relay, the first electricity Low-voltage direct mother is attempted by after the normally opened contact series connection of resistance, button switch, the coil windings of the second relay and the second relay Between the positive and negative anodes of line, the normally opened contact of second relay and the first relay normally open contact are in parallel, second relay The both ends of the normally opened contact of device are electrically connected with power supply leading-in end, power outlet respectively, the first resistor and button switch In parallel with energy-storage module after series connection, the timing circuit includes time delay module, and the time delay module is equipped with normally opened output contact, institute The normally-closed contact and time delay module for stating the second relay are attempted by the positive and negative anodes of low-voltage direct bus after connecting, the delay mould The output contact and button switch of block are in parallel, and the button switch is embedded in surface of shell.

Preferably, the power outlet is socket, and the power outlet is embedded on shell, the power supply leading-in end For plug, the power supply leading-in end is embedded on shell.

Preferably, the power supply leading-in end is the plug with lead.

Preferably, the energy-storage module is capacitor.

Preferably, the energy-storage module is small-capacity cells.

Preferably, the trigger circuit is serially connected with the normally-closed contact of the second relay.

Preferably, the time delay module is the time relay, the coil windings of the time relay and the second relay Normally-closed contact series connection after be attempted by the positive and negative anodes of low-voltage direct bus, the normally opened contact and button of the time relay are opened It closes in parallel.

Preferably, the time delay module includes delay circuit, switching tube, the normally-closed contact of delay circuit and the second relay It is attempted by after series connection on the positive and negative anodes of low-voltage direct bus, the base stage electrical connection of the output end and switching tube of delay circuit, institute The collector and emitter for stating switching tube is in parallel as the normally opened output contact and button switch of time delay module.

The utility model has the beneficial effects that:

1, guarantee after power is turned off, refrigerator will not power transmission immediately, protect the compressor of refrigerator, extend the use of refrigerator Service life.

2, in initial power receiving, will not start-up study power transmission function, have better user experience.

Detailed description of the invention

Fig. 1 is a kind of schematic diagram of embodiment of the utility model,

Fig. 2 is the schematic diagram that the utility model time delay module is the time relay,

Fig. 3 is a kind of schematic diagram that the utility model time delay module is delay circuit,

Fig. 4 is a kind of circuit diagram of optimal enforcement example of the utility model.

In figure:

KT, the time relay；

C, capacitor；

SB, button switch；

R1, first resistor；

K2, the second relay；

K1, the first relay；

D2, photodiode；

D1, light emitting diode；

5, timing circuit；

4, main control loop；

3, trigger circuit；

M1, power module；

2, power outlet；

1, power supply leading-in end.

Specific embodiment

A kind of refrigerator power-off protector, including a shell are equipped with controller circuitry in the inside of shell and in shell On be embedded with power supply leading-in end 1 and power outlet 2.In the prior art, control circuit is arranged on circuit boards, electronics member device Part welds on circuit boards.

Power supply leading-in end 1 is to connect external power supply, and there are two types of implementations for tool:

One, using the attaching plug for having lead, and the control circuit across shell and enclosure interior of lead is electrical Connection, attaching plug can be two-pin plug, or 3-phase plug；

Two, attaching plug, two-pin plug or 3-phase plug are directly embedded on shell, and electric with internal control Road electrical connection, using be will be equipped with plug shell insertion wall socket.

Power outlet 2 to refrigerator or other equipment to power, and the utility model mainly provides power supply to refrigerator, but not Only limit refrigerator.Therefore power outlet 2 is designed as the form of socket, and is embedded in the upper housing.

Protection of the control circuit to realize power-off, that is, delay is powered to refrigerator in the case where sending a telegram here immediately after powering off, tool Body is as follows:

Control circuit includes power module M1, low-voltage direct bus, trigger circuit 3, main control loop 4, timing circuit 5.

The input terminal and power supply leading-in end of power module M1 is electrically connected, the output end and low-voltage direct bus of source module M1 Electrical connection.Power module M1 is electric main to be converted to the module of low-voltage DC, and be that one kind is highly developed and show There is technology.Power module is typically provided transformer, rectification circuit, filtering and voltage regulator circuit etc..Such as application No. is 201310178141.8 a kind of patent disclose a kind of power module.The alternating current of high pressure is converted to the direct current of low pressure Not only have the function of that increasing safety also has the function of saving power consumption.

Low-voltage direct bus is to provide power supply to trigger circuit 3, main control loop 4, timing circuit 5.In the prior art, directly Galvanic electricity source is equipped with anode and cathode, therefore low-voltage direct bus includes positive and negative two conducting wires.

Trigger circuit is to receive incoming telephone signal and trigger main control loop 4, and the circuit is by light emitting diode D1, two pole of photoelectricity Pipe D2, the first relay K1, energy-storage module composition.Wherein: being attempted by low-pressure direct after light emitting diode D1 and energy-storage module series connection Between the positive and negative anodes for flowing bus；DC bus is being attempted by just after photodiode D2 and the series connection of the first relay K1 coil windings Between cathode；And the light-receiving surface of photodiode D2 is opposite with the light-emitting surface of light emitting diode D1.Energy-storage module be capacitor C or Person is the battery of low capacity.

According to circuit diagram it is found that when sending a telegram here for the first time, energy-storage module does not have electric energy, and power module M1 passes through light emitting diode D1 It charges to energy-storage module, electric current reaches 50mA, then light emitting diode D1 can be driven to shine, and light emitting diode D1 drives two pole of photoelectricity Pipe D2 conducting, the coil windings electrification of the first relay K1, the normally opened contact closure of the first relay K1.If vertical after power-off It sends a telegram here, energy-storage module has certain electric energy, and 50mA, which is not achieved, in charging current will not then trigger light emitting diode D1, in turn It will not power to power outlet 2.

Preferably, trigger circuit 3 is serially connected with the normally-closed contact of the second relay K2, to power on 1 He of leading-in end After power outlet 2, break trigger circuit and then the function of realizing energy saving.The one of the normally-closed contact of second relay K2 End is connected with low-voltage direct bus, the other end and light emitting diode D1 and photodiode D2 electrical connection.

Main control loop 4 is to control being connected and disconnected between power supply leading-in end 1 and power outlet 2.Main control loop 4 is main It to include the second relay K2, first resistor R1, button switch SB.The coil windings of second relay K2 and the second relay K2 Normally opened contact series connection after be attempted by between the positive and negative anodes of low-voltage direct bus, the normally opened contact of the second relay K2 and first after Electric appliance K1 normally opened contact is in parallel, and after the first relay K1 starts the second relay K2, the second relay K2 passes through oneself normally opened touching Point realizes self-locking.The both ends of the normally opened contact of second relay K2 electrically connect with power supply leading-in end 1, power outlet 2 respectively It connects, to realize the control of power supply output.It is in parallel with energy-storage module after first resistor R1 and button switch SB series connection.Button switch SB is embedded in surface of shell.Button switch SB is to discharge manually and then light light emitting diode.

Timing circuit 5 is to the function in the case where detecting incoming call, powered by delay to power outlet 2.Prolong Shi Huilu 5 include time delay module, the time delay module be equipped with normally opened output contact, the normally-closed contact of the second relay K2 and It is attempted by the positive and negative anodes of low-voltage direct bus after time delay module series connection, the output contact and button switch SB of the time delay module It is in parallel.

Realize that being delayed in field of electrical control is the more mature prior art, following embodiment is the realization of time delay module Mode:

Embodiment one:

Time delay module is time relay KT.The normally-closed contact string of the coil windings of time relay KT and the second relay It is attempted by after connection on the positive and negative anodes of low-voltage direct bus, the normally opened contact and button switch SB of time relay KT is in parallel.Coming After electricity, start timing, after the time of setting, the normally opened contact of time relay KT is closed, and energy-storage module is made to discharge And switched-on light emitting diodes D1 starts main control loop in turn.Time relay KT can select on-delay actuating relay.

Embodiment two:

Time delay module includes delay circuit, switching tube S1, after the normally-closed contact series connection of delay circuit and the second relay simultaneously It connects on the positive and negative anodes of low-voltage direct bus, the base stage electrical connection of the output end and switching tube S1 of delay circuit, switching tube S1 Collector and emitter it is in parallel as the normally opened output contact and button switch SB of time delay module.Delay circuit is by delay The output end of delay circuit exports a high level afterwards, and driving switch pipe S1 is connected, and then triggers trigger circuit.

Relatively simple delay circuit includes second and third resistance R1, R2, R3, capacitor C1, and fusion in the present invention, is delayed The circuit structure in circuit are as follows: normally-closed contact, second and third resistance R2, R3 of the second relay K2 is attempted by low-voltage direct after connecting On the positive and negative anodes of bus, and capacitor C1 is in parallel with 3rd resistor R3.The emitter and collector of switching tube S1 is respectively and button The both ends of switch SB are fixedly connected, and the tie point of the base stage of switching tube S1 and second and third resistance R2, R3 are electrically connected, and switch light The collector and emitter of S1 is electrically connected with the both ends of button switch SB respectively.

Prolonging for delay circuit is adjusted by the resistance value of adjusting 3rd resistor R3 and the size of capacitor C1 in delay circuit When the time.

It is merely illustrative the structure of delay circuit above, various delay circuits can be retrieved in patent database, together Sample can be applied in the utility model.

In conclusion the preferred embodiment of only the utility model, is not used to limit the scope of the utility model, Through the above description, relevant staff can carry out without departing from the scope of the technological thought of the present invention' completely Various changes and amendments.The technical scope of the utility model is not limited to the contents of the specification, and Fan Yiben is practical Shape described in novel claimed range, construction, feature and the so-called equivalent changes and modifications of spirit, should all include practical with this In novel scope of the claims.

Claims (8)

1. a kind of refrigerator power-off protector, including shell, it is characterised in that:

It further include power supply leading-in end (1), power outlet (2) and control circuit,

The control circuit includes power module (M1), low-voltage direct bus, trigger circuit (3), main control loop (4), is delayed back Road (5),

The input terminal and power supply leading-in end (1) of the power module (M1) are electrically connected, the output end of the power module (M1) It being electrically connected with low-voltage direct bus, the low-voltage direct bus includes positive and negative two conducting wires,

The trigger circuit (3) includes light emitting diode (D1), photodiode (D2), the first relay (K1), energy-storage module,

It is attempted by between the positive and negative anodes of low-voltage direct bus after the light emitting diode (D1) and energy-storage module series connection,

The photodiode (D2) and the first relay (K1) coil windings series connection after be attempted by DC bus positive and negative anodes it Between,

The light-receiving surface of the photodiode (D2) is opposite with the light-emitting surface of light emitting diode (D1),

The main control loop (4) includes the second relay (K2), first resistor (R1), button switch (SB),

Low-voltage direct mother is attempted by after the coil windings of second relay (K2) and the normally opened contact series connection of the second relay (K2) Between the positive and negative anodes of line, the normally opened contact and the first relay (K1) normally opened contact of second relay (K2) are in parallel, described The both ends of the normally opened contact of second relay (K2) are electrically connected with power supply leading-in end (1), power outlet (2) respectively, described It is in parallel with energy-storage module after first resistor (R1) and button switch (SB) series connection,

The timing circuit (5) includes time delay module, and the time delay module is equipped with normally opened output contact, second relay (K2) normally-closed contact and time delay module is attempted by the positive and negative anodes of low-voltage direct bus after connecting, the output of the time delay module Contact and button switch (SB) are in parallel,

The button switch (SB) is embedded in surface of shell.

2. a kind of refrigerator power-off protector according to claim 1, it is characterised in that:

The power outlet (2) is socket, and the power outlet (2) is embedded on shell,

The power supply leading-in end (1) is plug, and the power supply leading-in end (1) is embedded on shell.

3. a kind of refrigerator power-off protector according to claim 1, it is characterised in that:

The power supply leading-in end (1) is the plug with lead.

4. a kind of refrigerator power-off protector according to claim 1, it is characterised in that:

The energy-storage module is capacitor (C).

5. a kind of refrigerator power-off protector according to claim 1, it is characterised in that:

The energy-storage module is small-capacity cells.

6. a kind of refrigerator power-off protector according to claim 1, it is characterised in that:

The trigger circuit (3) is serially connected with the normally-closed contact of the second relay (K2).

7. a kind of refrigerator power-off protector according to claim 1, it is characterised in that:

The time delay module is the time relay (KT), the coil windings and the second relay (K2) of the time relay (KT) Normally-closed contact series connection after be attempted by the positive and negative anodes of low-voltage direct bus, the normally opened contact of the time relay (KT) and press Button switch (SB) is in parallel.

8. a kind of refrigerator power-off protector according to claim 1, it is characterised in that:

The time delay module includes delay circuit, switching tube (S1), the normally-closed contact string of delay circuit and the second relay (K2) It is attempted by after connection on the positive and negative anodes of low-voltage direct bus, the base stage electrical connection of the output end and switching tube (S1) of delay circuit, The collector and emitter of the switching tube (S1) is in parallel as the normally opened output contact and button switch (SB) of time delay module.