CN202276330U - Water-boiling automatic powering-off controller for electrothermal cup - Google Patents

Abstract

The utility model discloses a water-boiling automatic powering-off controller for an electrothermal cup, comprising a switch button SB, a rectification circuit, a control circuit, an alarm circuit, a controller socket DS and a temperature control switch ST connected with the power supply circuit of an electrothermal cup, wherein an AC power supply provides electric power for the rectification circuit through the switch button SB, the AC electricity is rectified by the rectification circuit and then provided to the control circuit, and the control circuit controls the alarm circuit through detecting the switching on and off of the temperature control switch ST. The temperature control switch ST is connected with the power supply circuit of the electrothermal cup, when the water is boiled the power supply circuit is automatically disconnected, i.e., the power supply of the electrothermal cup is automatically cut off, and simultaneously an alarm voice sound is emitted, thereby effectively avoiding water spilling and drying out phenomenon, and preventing fire accident caused by the burning out of the electrothermal cup or enabling the electrothermal cup to be powered on for a long time.

Description

Electric cup water leaves automatic turning-off controller

Technical field

The utility model relates to a kind of electric cup auto-power-off device, be specially a kind of can be in the boiled back of electric cup water automatically the electric cup water of outage and warning reminding open automatic turning-off controller.

Background technology

Electric cup is a kind of small-sized family expenses electrical equipment of heating up water, though and the plain edition electric cup is inexpensive at present owing to there is not the temperature control breaker device, when heating up water, is easy to occur spilling water, even dryouies as careless, gently then burn out electric cup, when serious even lead to a disaster.And the electric cup that has circuit protection device costs an arm and a leg, and only have water cut-off electric work can, can not water cut-off the electricity in warning reminding.Most of consumer buys and uses the plain edition electric cup that does not have the temperature control power-off protection apparatus, therefore for protecting the safe in utilization of most of consumer group, needs a kind of cheapness and safe and reliable automatic temperature-controlled breaker device.

The utility model content

The purpose of the utility model provides a kind of electric cup water and opens automatic turning-off controller, does not have the temperature control breaker device to solve prior art plain edition electric cup, and water is opened can not warning reminding; Spilling water appears easily; Even dryout, gently then burn out electric cup, when serious even lead to the problem of security incident.

For achieving the above object, the technical scheme that the utility model adopts is:

A kind of electric cup water is opened automatic turning-off controller; Comprise shift knob SB, rectification circuit, control circuit, warning circuit, socket controller DS and temperature detect switch (TDS) ST, said shift knob SB and socket controller DS are connected in series on the AC power, and said socket controller DS supplies the power supply circuits of electric cup to insert; Said temperature detect switch (TDS) ST is connected on the power supply circuits of electric cup; Two inputs of said rectification circuit are connected on the AC power, and alternating current is supplied power to warning circuit by two output output DCs after rectification, and said control circuit is connected on the AC power; Its output inserts warning circuit; The control warning circuit is reported to the police and connecting and disconnecting of the circuit, and it is characterized in that: said rectification circuit comprises rectifier bridge QC, and the input of rectifier bridge QC is through the live wire end of RC series circuit incoming transport power supply; Another input is connected the zero line side of AC power, and two outputs insert warning circuit behind shunt capacitance C2, the voltage stabilizing didoe VD1 successively;

Said control circuit comprises optocoupler PC; Be connected with the parallel branch of resistance R 6, R7 composition between 1,2 pin of optocoupler PC; One end of 1 pin of optocoupler PC and resistance R 6, R7 parallel branch is in series with resistance R 5; The parallel branch that resistance R 6, R7 are formed is connected on the AC power, and 4 pin of optocoupler PC are connected the base stage of triode VT3 through resistance R 4, and 3 pin are divided into two-way; One the tunnel is connected through the emitter of capacitor C 4 with triode VT2 on 3 pin of optocoupler PC; Another road is connected through the base stage of resistance R 3 with triode VT2 on 3 pin of optocoupler PC, is connected on the emitter of triode VT3 after the parallel branch of the collector electrode of triode VT2 through diode VD2 and relay K composition, and the emitter and collector that is connected to capacitor C 3 and triode VT3 between the emitter and collector of triode VT3 inserts warning circuit respectively;

Said warning circuit comprises triode VT1; The emitter of triode VT1 inserts an output of rectification circuit; Insert another output of rectification circuit behind the collector electrode connection news Chinese percussion instrument BZ again, the emitter of triode VT1 and base stage access control circuit, wherein triode VT1 emitter is connected with the emitter of triode VT3; Triode VT1 base stage is connected with the base stage of triode VT3, and is connected to resistance R 2 between the base stage of triode VT1 and the news Chinese percussion instrument BZ.

The beneficial effect of the utility model is:

The utility model adopts temperature detect switch (TDS) and warning device; Temperature detect switch (TDS) is connected on the power supply circuits of electric cup; Can automatic disconnection when water is opened, promptly cut off the electric cup power supply automatically, warning circuit sends alarm voice simultaneously; Avoid spilling water effectively, dryouied, prevented the generation that electric cup burns out or energising for a long time leads to fire incident.

Description of drawings

Fig. 1 is the utility model circuit theory diagrams.

Fig. 2 is connected electrically in sketch map in the electric cup power supply circuits for temperature detect switch (TDS) ST.

Embodiment

As shown in Figure 1; The utility model comprises shift knob SB, rectification circuit, control circuit, warning circuit, socket controller DS and temperature detect switch (TDS) ST, and shift knob SB and socket controller DS are connected in series on the AC power, and socket controller DS supplies the power supply circuits of electric cup to insert; Temperature detect switch (TDS) ST is connected on the power supply circuits of electric cup; Two inputs of rectification circuit are connected on the AC power, and alternating current is supplied power to warning circuit by two output output DCs after rectification, and control circuit is connected on the AC power; Its output inserts warning circuit, and the control warning circuit is reported to the police and connecting and disconnecting of the circuit.

Rectification circuit comprises rectifier bridge QC; The input of rectifier bridge QC is through the live wire end of RC series circuit incoming transport power supply; Another input is connected the zero line side of AC power, and two outputs insert warning circuit behind shunt capacitance C2, the voltage stabilizing didoe VD1 successively;

Control circuit comprises optocoupler PC; Be connected with the parallel branch of resistance R 6, R7 composition between 1,2 pin of optocoupler PC; One end of 1 pin of optocoupler PC and resistance R 6, R7 parallel branch is in series with resistance R 5; The parallel branch that resistance R 6, R7 are formed is connected on the AC power, and 4 pin of optocoupler PC are connected the base stage of triode VT3 through resistance R 4, and 3 pin are divided into two-way; One the tunnel is connected through the emitter of capacitor C 4 with triode VT2 on 3 pin of optocoupler PC; Another road is connected through the base stage of resistance R 3 with triode VT2 on 3 pin of optocoupler PC, is connected on the emitter of triode VT3 after the parallel branch of the collector electrode of triode VT2 through diode VD2 and relay K composition, and the emitter and collector that is connected to capacitor C 3 and triode VT3 between the emitter and collector of triode VT3 inserts warning circuit respectively;

Warning circuit comprises triode VT1; The emitter of triode VT1 inserts an output of rectification circuit; Insert another output of rectification circuit behind the collector electrode connection news Chinese percussion instrument BZ again, the emitter of triode VT1 and base stage access control circuit, wherein triode VT1 emitter is connected with the emitter of triode VT3; Triode VT1 base stage is connected with the base stage of triode VT3, and is connected to resistance R 2 between the base stage of triode VT1 and the news Chinese percussion instrument BZ.

Operation principle: when heating up water electric cup is inserted among the socket controller DS, presses shift knob SB, civil power is through capacitor C 1 step-down; Rectifier bridge QC rectification, capacitor C 2 filtering obtain 12V voltage after the voltage stabilizing didoe VD1 voltage stabilizing; Supply control circuit, simultaneously electric cup gets the electrician and does, its operating current flow through resistance R 6, R7 and produce and exchange pressure drop; When exchanging positive half cycle, through resistance R 5 current limlitings, make in the optocoupler PC luminous tube luminous, photosensitive tube receives conducting after the illumination; Photosensitive tube is to capacitor C 4 charging in triode VT3 emitter junction, resistance R 4, optocoupler PC for electric current, because charge constant is very little, 4 moments of capacitor C promptly are charged near supply voltage; Make triode VT2 conducting, the relay K adhesive makes the circuit self-locking.Meanwhile, triode VT3 obtains the base stage bias current and saturation conduction causes triode VT1 to end, and news Chinese percussion instrument BZ does not work.Exchanging between negative half-cycle, though photosensitive tube ends in the optocoupler PC, capacitor C 4 discharges; But because capacitor C 4 chargings are fast, discharge is slow, so little to the influence of capacitor C 4 voltage; Triode VT3 is owing to controlled by optocoupler PC; Thereby its base stage output 50HZ alternating current component, the effect of capacitor C 3 is exactly that its alternating current component of filtering makes triode VT1 remain on stable cut-off state, avoids interrogating Chinese percussion instrument BZ and receives the modulation sounding.The boiled back of water temperature detect switch (TDS) ST normally-closed contact breaks off, and electric cup quits work, at this moment flow through resistance R 6, R7 of no current; Resistance R 6, R7 voltage are reduced to zero and are made that luminous tube extinguishes in the optocoupler PC, and photosensitive tube ends thereupon in the optocoupler PC, thereby make triode VT3 lose bias current and end; Triode VT1 positively biased saturation conduction, news Chinese percussion instrument BZ gets the electrician and does, and sends chimes of doom and reminds the user; After photosensitive tube ends in optocoupler PC; Capacitor C 4 is kept triode VT2 conducting through resistance R 3, the discharge of triode VT2 emitter, makes relay K keep adhesive, along with capacitor C 4 its voltage of discharge descend gradually; Cut off the control circuit AC power and stop to report to the police when reducing to when being not enough to keep triode VT2 conducting then relay K, time of fire alarming length is by resistance R 3, capacitor C 4 decisions.

Temperature switch ST is fixedly mounted in the electric cup heat-generating disc, and its temperature-sensitive face and heat-generating disc are in same plane, and at the bottom of being close to glass, temperature switch ST temperature-sensitive face and cup are coated with heat-conducting silicone grease between the end.

Components and parts are selected: temperature detect switch (TDS) ST selects 100 ℃ for use, and the contact is seal temperature switch commonly used; Relay K is selected 12V small-sized sealing relay for use, contact capacity >=5A (AC220V); News Chinese percussion instrument BZ selects Φ 12mm for use, and 12V carries the direct current news Chinese percussion instrument of sound wave; Optocoupler PC selects four pin for use, all can like TLP621, TLP521, PC817; Resistance R 6, R7 select the cement resistor of 2.7 ohm of 5W for use; Shift knob SB selects A type push-button switch for use, contact capacity 73A (AC220V); Triode VT2 selects 9013 or 8050 for use, and triode VT3 selects 9012 or 8550 for use, requires β >=120.

Claims (1)

1. an electric cup water leaves automatic turning-off controller; Comprise shift knob SB, rectification circuit, control circuit, warning circuit, socket controller DS and temperature detect switch (TDS) ST, said shift knob SB and socket controller DS are connected in series on the AC power, and said socket controller DS supplies the power supply circuits of electric cup to insert; Said temperature detect switch (TDS) ST is connected on the power supply circuits of electric cup; Two inputs of said rectification circuit are connected on the AC power, and alternating current is supplied power to warning circuit by two output output DCs after rectification, and said control circuit is connected on the AC power; Its output inserts warning circuit; The control warning circuit is reported to the police and connecting and disconnecting of the circuit, and it is characterized in that: said rectification circuit comprises rectifier bridge QC, and the input of rectifier bridge QC is through the live wire end of RC series circuit incoming transport power supply; Another input is connected the zero line side of AC power, and two outputs insert warning circuit behind shunt capacitance C2, the voltage stabilizing didoe VD1 successively;

Said control circuit comprises optocoupler PC; Be connected with the parallel branch of resistance R 6, R7 composition between 1,2 pin of optocoupler PC; One end of 1 pin of optocoupler PC and resistance R 6, R7 parallel branch is in series with resistance R 5; The parallel branch that resistance R 6, R7 are formed is connected on the AC power, and 4 pin of optocoupler PC are connected the base stage of triode VT3 through resistance R 4, and 3 pin are divided into two-way; One the tunnel is connected through the emitter of capacitor C 4 with triode VT2 on 3 pin of optocoupler PC; Another road is connected through the base stage of resistance R 3 with triode VT2 on 3 pin of optocoupler PC, is connected on the emitter of triode VT3 after the parallel branch of the collector electrode of triode VT2 through diode VD2 and relay K composition, and the emitter and collector that is connected to capacitor C 3 and triode VT3 between the emitter and collector of triode VT3 inserts warning circuit respectively;

Said warning circuit comprises triode VT1; The emitter of triode VT1 inserts an output of rectification circuit; Insert another output of rectification circuit behind the collector electrode connection news Chinese percussion instrument BZ again, the emitter of triode VT1 and base stage access control circuit, wherein triode VT1 emitter is connected with the emitter of triode VT3; Triode VT1 base stage is connected with the base stage of triode VT3, and is connected to resistance R 2 between the base stage of triode VT1 and the news Chinese percussion instrument BZ.

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