CN100449430C - Electricity-saving circuit of rice cooker - Google Patents
Electricity-saving circuit of rice cooker Download PDFInfo
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- CN100449430C CN100449430C CNB2007100674748A CN200710067474A CN100449430C CN 100449430 C CN100449430 C CN 100449430C CN B2007100674748 A CNB2007100674748 A CN B2007100674748A CN 200710067474 A CN200710067474 A CN 200710067474A CN 100449430 C CN100449430 C CN 100449430C
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Abstract
The invention relates to an energy-saving circuit of electric cooker, for resolving the defects of waste energy in present electric cookers. The invention comprises a main circuit, a direct-current constant voltage power supply circuit, a temperature detecting circuit, a delay circuit, and a driving converting circuit. The invention uses a temperature sensor to collect the temperature of an air outlet of the electric cooker, via the temperature detecting circuit to be converted into direct current level changing along the temperature. When boiling gruel, the temperature detecting circuit outputs high current level to directly drive the main circuit which will hold lower output voltage to keep steaming temperature in the cooker. And when boiling dry food, the high current level output from the temperature detecting circuit will trigger the delay circuit, via the driving converting circuit to cut off the main circuit for some time, and return power when reaches the delay time, to save energy.
Description
Technical field
The invention belongs to household electrical appliance control field, particularly relate to a kind of power save circuit of electric cooker.
Background technology
There are some general problems in the most existing electric cooker: can only dryout meal, can not burn gruel or other need the food of smoldering, as pig's feet etc. (some is marking the electric cooker that can burn gruel, and actual is only to have added a diode in inside, and pressing when burning gruel as usual with half, meeting waterfall comes out); When dryouting meal, boiled just burn tripping operation, the solution thin rice gruel water in the electric cooker is also always at waterfall always, and nearly five minutes of this process had both been wasted electric energy, caused soup disorderly to overflow again easily, and was very unhygienic.Some high-grade electric cooker can be avoided these problems, but function setting program trouble, and the price comparison height, how general family does not use.
Summary of the invention
Purpose of the present invention is exactly at the deficiencies in the prior art, and a kind of circuit that can make electric cooker in use can economize on electricity and keep clean is provided.
Circuit of the present invention comprises main loop circuit, DC-stabilized circuit, temperature measurement circuit, delay circuit and the driving change-over circuit that can regulate firepower voltage;
Main loop circuit comprises voltage accessory power outlet CZ, the two ends of voltage accessory power outlet CZ are connected with AC power L end with the anode of bidirectional triode thyristor T respectively, the negative electrode of bidirectional triode thyristor T is connected with AC power N end, and the control utmost point of bidirectional triode thyristor T is connected with the end of bidirectional trigger diode DB; The other end of bidirectional trigger diode DB is connected with pulse shaping resistance R 9 with the end of pulse electric capacity C4; The other end of pulse electric capacity C4 is connected with AC power N end with the negative electrode of bidirectional triode thyristor T; The other end of pulse shaping resistance R 9 is connected with the normally closed contact of relay J;
DC-stabilized circuit comprises that step-down current limiting capacitance C5 in parallel and electric charge discharge resistance R 8, end after the parallel connection is connected with AC power L end, the other end is connected with the input end of rectifier bridge heap Q, another input end of rectifier bridge heap Q is connected with AC power N end with the negative electrode of bidirectional triode thyristor T, the output head grounding of rectifier bridge heap Q, another output terminal is connected with the positive pole of filter capacitor C3 and the negative pole of voltage stabilizing diode 2CW respectively, the negative pole of filter capacitor C3, the positive pole of voltage stabilizing diode 2CW, the minus earth of filter capacitor C2, the input end of integrated regulator IC2 is connected with the negative pole of voltage stabilizing diode 2CW, output terminal is connected with the positive pole of filter capacitor C2;
Temperature measurement circuit comprises the fortune first calculation amplifier Y1, the positive input terminal of the first operational amplifier Y1 is connected with the center-side that temperature is provided with resistance W1 with the end of thermistor Rt0, and the end of the end of divider resistance R1 and first time divider resistance R2 is connected on the negative input end and first; The end that temperature is provided with resistance W1 is connected other end ground connection with the end of thermistor Rt0; The other end of divider resistance R1 is connected with the output terminal of integrated regulator IC2 on the other end of thermistor Rt0 and first; The other end ground connection of first time divider resistance R2;
Delay circuit comprises the second operational amplifier Y2, the positive input terminal of the second operational amplifier Y2 is connected with the negative pole of time-delay charging capacitor C1, the end of time-delay discharge resistance R3, the end of positive voltage feedback resistance R6, and the end of the end of divider resistance R4 and second time divider resistance R5 is connected on the negative input end and second; The other end of divider resistance R4 is connected with the output terminal of integrated regulator IC2 on second, the other end ground connection of second time divider resistance R5, and the positive pole of time-delay charging capacitor C1 is connected with the output terminal of the first operational amplifier Y1; The other end of voltage positive feedback resistance R 6 is connected with the output terminal of the second operational amplifier Y2 by the second switch K1-2;
Drive change-over circuit and comprise transistor BG, the base stage of transistor BG is connected with the end of current-limiting resistance R7, and collector is connected grounded emitter with an end of relay J and the positive pole of the 3rd diode D1; The negative pole of the other end of relay J and the 3rd diode D1 is connected with the input end of integrated regulator IC2; The other end of current-limiting resistance R7 is connected with the output terminal of the second operational amplifier Y2; The normally opened contact of relay J is connected with the end of AC voltage adjusting resistance W2, normally closed contact and pulse shaping resistance R 9 be connected, central contact is connected with the anode of bidirectional triode thyristor T; The other end of AC voltage adjusting resistance W2 is connected with pulse electric capacity C4, pulse shaping resistance R 9 and bidirectional trigger diode DB by the first switch K1-1; The first switch K1-1 and second switch K1-2 interlock.
Employed all devices of integrated regulator IC2 that comprise of circuit of the present invention all use existing product, can obtain by modes such as purchases.
The temperature that circuit of the present invention is gathered the electric cooker venthole by temperature sensor (thermistor Rt0) converts temperature variant DC level to by temperature measurement circuit.By temperature the height that resistance W1 is provided with level threshold is set in the temperature measurement circuit, the venthole temperature arrives when being provided with, temperature measurement circuit output high level.As when burning gruel, the high level of temperature measurement circuit output directly drives main loop circuit, makes main loop circuit keep lower output voltage, makes to keep the temperature that is fit to smoulder in the pot; As when dryouting meal, the high level of temperature measurement circuit output triggers delay circuit, by driving change-over circuit main loop circuit is stopped power supply a period of time, and after delay time arrived, main loop circuit restored electricity, and up to making the meal ready, has realized purpose of energy saving.
Description of drawings
Fig. 1 is a circuit diagram of the present invention.
Embodiment
As shown in Figure 1, electricity-saving circuit of rice cooker comprises main loop circuit, DC-stabilized circuit, temperature measurement circuit, delay circuit and driving change-over circuit.
Main loop circuit comprises voltage accessory power outlet CZ, the two ends of voltage accessory power outlet CZ are connected with AC power L end with the anode of bidirectional triode thyristor T respectively, the negative electrode of bidirectional triode thyristor T is connected with AC power N end, and the control utmost point of bidirectional triode thyristor T is connected with the end of bidirectional trigger diode DB.The other end of bidirectional trigger diode DB is connected with pulse shaping resistance R 9 with the end of pulse electric capacity C4.The other end of pulse electric capacity C4 is connected with AC power N end with the negative electrode of bidirectional triode thyristor T.The other end of pulse shaping resistance R 9 is connected with the normally closed contact of relay J.
DC-stabilized circuit comprises that step-down current limiting capacitance C5 in parallel and electric charge discharge resistance R 8, end after the parallel connection is connected with AC power L end, the other end is connected with the input end of rectifier bridge heap Q, another input end of rectifier bridge heap Q is connected with AC power N end with the negative electrode of bidirectional triode thyristor T, the output head grounding of rectifier bridge heap Q, another output terminal is connected with the positive pole of filter capacitor C3 and the negative pole of voltage stabilizing diode 2CW respectively, the negative pole of filter capacitor C3, the positive pole of voltage stabilizing diode 2CW, the minus earth of filter capacitor C2, the input end of integrated regulator IC2 is connected with the negative pole of voltage stabilizing diode 2CW, output terminal is connected with the positive pole of filter capacitor C2.
Temperature measurement circuit comprises the first operational amplifier Y1, the positive input terminal of the first operational amplifier Y1 is connected with the center-side that temperature is provided with resistance W1 with the end of thermistor Rt0, and the end of the end of divider resistance R1 and first time divider resistance R2 is connected on the negative input end and first.The end that temperature is provided with resistance W1 is connected other end ground connection with the end of thermistor Rt0.The other end of divider resistance R1 is connected with the output terminal of integrated regulator IC2 on the other end of thermistor Rt0 and first.The other end ground connection of first time divider resistance R2.
Delay circuit comprises the second operational amplifier Y2, the positive input terminal of the second operational amplifier Y2 is connected with the negative pole of time-delay charging capacitor C1, the end of time-delay discharge resistance R3, the end of positive voltage feedback resistance R6, and the end of the end of divider resistance R4 and second time divider resistance R5 is connected on the negative input end and second; The other end of divider resistance R4 is connected with the output terminal of integrated regulator IC2 on second, the other end ground connection of second time divider resistance R5, and the positive pole of time-delay charging capacitor C1 is connected with the output terminal of the first operational amplifier Y1.The other end of voltage positive feedback resistance R 6 is connected with the output terminal of the second operational amplifier Y2 by the second switch K1-2.
Drive change-over circuit and comprise transistor BG, the base stage of transistor BG is connected with the end of current-limiting resistance R7, and collector is connected grounded emitter with an end of relay J and the positive pole of the 3rd diode D1; The negative pole of the other end of relay J and the 3rd diode D1 is connected with the input end of integrated regulator IC2.The other end of current-limiting resistance R7 is connected with the output terminal of the second operational amplifier Y2; The normally opened contact of relay J is connected with the end of AC voltage adjusting resistance W2, normally closed contact and pulse shaping resistance R 9 be connected, central contact is connected with the anode of bidirectional triode thyristor T.The other end of AC voltage adjusting resistance W2 is connected with pulse electric capacity C4, pulse shaping resistance R 9 and bidirectional trigger diode DB by the first switch K1-1.The first switch K1-1 and second switch K1-2 interlock.
The course of work of electricity-saving circuit of rice cooker of the present invention:
The power connection electric cooker is connected in the CZ jack, the temperature sensor of being made up of thermistor Rt0 is inserted in the venthole of electric cooker, the relay J of this moment does not have adhesive, the 220V AC power forms pulse voltage by charging resistor R9 and pulse electric capacity C4, because the resistance value of pulse shaping resistance R 9 is very little, it is very high to form pulse repetition frequency, make the complete conducting of bidirectional triode thyristor T by bidirectional trigger diode DB, be that full voltage 220V voltage is added on electric cooker, hot plate for normal big fire this moment.
1) when dryouting meal, when temperature reaches the value (about 100 ℃) of setting, first operational amplifier Y1 output high level in the temperature measurement circuit, at this moment, the first switch K1-1 and the second switch K1-2 disconnect, the high level process time-delay charging capacitor C1 and the time-delay discharge resistance R3 of first operational amplifier Y1 output forms 5 minutes delay circuits when dryouting meal, make the positive input terminal of the second operational amplifier Y2 keep 5 minutes high level, thereby make the output terminal of the second operational amplifier Y2 keep 5 minutes high level, in 5 minutes high level of this maintenance, the base stage of triode BG also is a high level, triode BG is in conducting state, the relay J adhesive, the normally closed contact of relay J disconnects, cut off the path of pulse shaping resistance R 9, bidirectional trigger diode DB and bidirectional triode thyristor T are ended, just stopped powering about 5 minutes to electric cooker.
2) when burning gruel, when temperature reaches the value (about 100 ℃) of setting, first operational amplifier Y1 output high level in the temperature measurement circuit, at this moment, the first switch K1-1 and the second switch K1-2 connect, the high level of first operational amplifier Y1 output makes the positive input terminal of second operational amplifier Y2 always be high level through capacitor C 1 (not being the time-delay charge function) here, because the first switch K1-1 connects the access that voltage positive feedback resistance R 6 is arranged, thereby the output terminal that makes the second operational amplifier Y2 also is a high level always, the base stage of triode BG also is a high level, triode BG is in conducting state, the relay J adhesive, the normally closed contact of relay J disconnects, cut off the path of pulse shaping resistance R 9, but the normally opened contact of relay J is connected, because the second switch K1-2 and the first switch K1-1 connect simultaneously, firepower voltage-regulation resistance W2 also connects, make bidirectional trigger diode DB constantly conducting under very low frequency, the conduction angle of bidirectional triode thyristor T is very little, and promptly output voltage is very low.
Claims (1)
1, a kind of electricity-saving circuit of rice cooker is characterized in that this circuit comprises main loop circuit, DC-stabilized circuit, temperature measurement circuit, delay circuit and driving change-over circuit;
Main loop circuit comprises voltage accessory power outlet (CZ), the two ends of voltage accessory power outlet (CZ) are connected with AC power L end with the anode of bidirectional triode thyristor (T) respectively, the negative electrode of bidirectional triode thyristor (T) is connected with AC power N end, and the control utmost point of bidirectional triode thyristor (T) is connected with an end of bidirectional trigger diode (DB); The other end of bidirectional trigger diode (DB) is connected with pulse shaping resistance (R9) with an end of pulse electric capacity (C4); The other end of pulse electric capacity (C4) is connected with AC power N end with the negative electrode of bidirectional triode thyristor (T); The other end of pulse shaping resistance (R9) is connected with the normally closed contact of relay (J);
DC-stabilized circuit comprises that step-down current limiting capacitance (C5) in parallel and electric charge discharge resistance (R8), end after the parallel connection is connected with AC power L end, the other end is connected with an input end of rectifier bridge heap (Q), another input end of rectifier bridge heap (Q) is connected with AC power N end with the negative electrode of bidirectional triode thyristor (T), an output head grounding of rectifier bridge heap (Q), another output terminal is connected with the positive pole of filter capacitor (C3) and the negative pole of voltage stabilizing diode (2CW) respectively, the negative pole of filter capacitor (C3), the positive pole of voltage stabilizing diode (2CW), the minus earth of filter capacitor (C2), the input end of integrated regulator (IC2) is connected with the negative pole of voltage stabilizing diode (2CW), output terminal is connected with the positive pole of filter capacitor (C2);
Temperature measurement circuit comprises first operational amplifier (Y1), the positive input terminal of first operational amplifier (Y1) is connected with the center-side that temperature is provided with resistance (W1) with an end of thermistor (Rt0), and an end of divider resistance on the negative input end and first (R1) is connected with an end of first time divider resistance (R2); The end that temperature is provided with resistance (W1) is connected other end ground connection with an end of thermistor (Rt0); The other end of divider resistance (R1) is connected with the output terminal of integrated regulator (IC2) on the other end and first of thermistor (Rt0); The other end ground connection of first time divider resistance (R2);
Delay circuit comprises second operational amplifier (Y2), the positive input terminal of second operational amplifier (Y2) is connected with the negative pole of time-delay charging capacitor (C1), an end of time-delay discharge resistance (R3), an end of positive voltage feedback resistance (R6), and an end of divider resistance on the negative input end and second (R4) is connected with an end of second time divider resistance (R5); The other end of divider resistance on second (R4) is connected with the output terminal of integrated regulator (IC2), the other end ground connection of second time divider resistance (R5), and the positive pole of time-delay charging capacitor (C1) is connected with the output terminal of first operational amplifier (Y1); The other end of voltage positive feedback resistance (R6) is connected with the output terminal of second operational amplifier (Y2) by second switch (K1-2);
Drive change-over circuit and comprise transistor (BG), the base stage of transistor (BG) is connected with an end of current-limiting resistance (R7), and collector is connected grounded emitter with an end of relay (J) and the positive pole of the 3rd diode (D1); The negative pole of the other end of relay (J) and the 3rd diode (D1) is connected with the input end of integrated regulator (IC2); The other end of current-limiting resistance (R7) is connected with the output terminal of second operational amplifier (Y2); The normally opened contact of relay (J) is connected with an end of AC voltage adjusting resistance (W2), normally closed contact and pulse shaping resistance (R9) be connected, central contact is connected with the anode of bidirectional triode thyristor (T); The other end of AC voltage adjusting resistance (W2) is connected with pulse electric capacity (C4), pulse shaping resistance (R9) and bidirectional trigger diode (DB) by first switch (K1-1); First switch (K1-1) and second switch (K1-2) interlock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100674748A CN100449430C (en) | 2007-03-13 | 2007-03-13 | Electricity-saving circuit of rice cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100674748A CN100449430C (en) | 2007-03-13 | 2007-03-13 | Electricity-saving circuit of rice cooker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101040761A CN101040761A (en) | 2007-09-26 |
| CN100449430C true CN100449430C (en) | 2009-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100674748A Expired - Fee Related CN100449430C (en) | 2007-03-13 | 2007-03-13 | Electricity-saving circuit of rice cooker |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539884A (en) * | 2011-12-30 | 2012-07-04 | 美的集团有限公司 | Method for detecting voltage value |
| CN102846182A (en) * | 2012-09-05 | 2013-01-02 | 浙江苏泊尔家电制造有限公司 | Electric cooker and heating control method thereof |
| CN105807813A (en) * | 2014-12-31 | 2016-07-27 | 无锡汉思特电器科技有限公司 | Electric ceramic cooker control circuit |
| CN109560548A (en) * | 2019-01-22 | 2019-04-02 | 江苏艾和系统集成工程有限公司 | A kind of automatic power Control System of Load Distribution device |
| CN114300895B (en) * | 2021-12-06 | 2023-11-17 | 六安市同心畅能电子科技有限公司 | Wall socket circuit of energy-saving electric cooker |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2039488U (en) * | 1988-11-01 | 1989-06-14 | 林梓梁 | Power-economizing and life-prolonging device for electrothermal equipment |
| CN2078499U (en) * | 1990-11-04 | 1991-06-05 | 卢受益 | Protective electricity-saving device for refrigerator |
| JP2001076843A (en) * | 1999-09-02 | 2001-03-23 | Sanyo Electric Co Ltd | Cooking device |
| JP2001176652A (en) * | 2000-10-31 | 2001-06-29 | Matsushita Electric Ind Co Ltd | Heating cocker |
| CN1658103A (en) * | 2005-03-01 | 2005-08-24 | 谭启仁 | Shock-proof energy-saving controller for electric cooker |
-
2007
- 2007-03-13 CN CNB2007100674748A patent/CN100449430C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2039488U (en) * | 1988-11-01 | 1989-06-14 | 林梓梁 | Power-economizing and life-prolonging device for electrothermal equipment |
| CN2078499U (en) * | 1990-11-04 | 1991-06-05 | 卢受益 | Protective electricity-saving device for refrigerator |
| JP2001076843A (en) * | 1999-09-02 | 2001-03-23 | Sanyo Electric Co Ltd | Cooking device |
| JP2001176652A (en) * | 2000-10-31 | 2001-06-29 | Matsushita Electric Ind Co Ltd | Heating cocker |
| CN1658103A (en) * | 2005-03-01 | 2005-08-24 | 谭启仁 | Shock-proof energy-saving controller for electric cooker |
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| Publication number | Publication date |
|---|---|
| CN101040761A (en) | 2007-09-26 |
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Granted publication date: 20090107 Termination date: 20120313 |