CN103405161A - Electric cooking appliance and heating control method thereof - Google Patents

Electric cooking appliance and heating control method thereof Download PDF

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Publication number
CN103405161A
CN103405161A CN2013103313982A CN201310331398A CN103405161A CN 103405161 A CN103405161 A CN 103405161A CN 2013103313982 A CN2013103313982 A CN 2013103313982A CN 201310331398 A CN201310331398 A CN 201310331398A CN 103405161 A CN103405161 A CN 103405161A
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China
Prior art keywords
resistance
voltage
current
control chip
relay
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CN2013103313982A
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CN103405161B (en
Inventor
吴勇
孟城城
樊杜平
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Zhejiang Supor Electrical Appliances Manufacturing Co Ltd
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Zhejiang Supor Electrical Appliances Manufacturing Co Ltd
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Priority to CN201210325537.6 priority Critical
Priority to CN2012103255376 priority
Priority to CN 201210325537 priority patent/CN102846182A/en
Application filed by Zhejiang Supor Electrical Appliances Manufacturing Co Ltd filed Critical Zhejiang Supor Electrical Appliances Manufacturing Co Ltd
Priority to CN201310331398.2A priority patent/CN103405161B/en
Publication of CN103405161A publication Critical patent/CN103405161A/en
Application granted granted Critical
Publication of CN103405161B publication Critical patent/CN103405161B/en
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Abstract

An electric cooling appliance comprises a pot, a cover, an inner pot, a heating device, a control device and a switch power supply. The heating device comprises a relay temperature control mechanism and a thyristor temperature control mechanism. The relay temperature control mechanism comprises a relay and a first heating tube connected with the relay. The thyristor temperature control mechanism comprises a thyristor and a second heating tube controlled by the thyristor. The thyristor and the relay are controlled by the control device. A heating control method includes: setting output power as P0; calculating power Pr of the first heating tube under the current voltage; calculating difference between P0 and Pr, and converting specific value of the difference to Pt into half wave number triggered by the thyristor; counting the half wave number triggered by the thyristor; acquiring currently required output power. The electric cooling appliance and the heating control method has the advantage that excessive temperature rise of the thyristor can be avoided.

Description

Electric cooking appliance and method for heating and controlling thereof
Technical field
The present invention relates to a kind of electric cooking appliance and method for heating and controlling thereof.
Background technology
At present, the intelligent electric cooker on market is used relay to connect a heat-generating disc usually, and the duty that changes the jug with heating disk cycle according to the food cooking curve negotiating prestored in controller is the mean power of regulation heating sheet recently.Or use controllable silicon to connect a heat-generating disc, according to the food cooking curve negotiating prestored in controller, change the power of silicon controlled triggered time regulation heating dish.The defect that this temperature control method exists is: 1, the heat-generating disc power stage is inhomogeneous, along with there is larger fluctuation in the temperature of opening and close of relay.2, the voltage due to civil power can fluctuate, even food adopts identical heating dutycycle, its mean power is not identical yet, impact culinary art effect.When overtension, because mean power becomes large, the water boiling in pot is too violent and cause food to become rotten even overflowing; When brownout, because mean power diminishes, the coolant-temperature gage deficiency in pot causes food to cook putting in place.While 3, using separately the controllable silicon temperature control, regulate the electric current that high-power heater power can make controllable silicon pass through excessive, cause the silicon controlled heating loss to become greatly, need the large-size radiator to be used in conjunction with, cause the circuit board of electric cooking appliance to do very large, the volume of electric cooking appliance is large.
Summary of the invention
For the above-mentioned defect of the temperature control method that overcomes existing electric cooker, the invention provides and a kind ofly can avoid the too high electric cooking appliance of controllable silicon temperature rise and method for heating and controlling thereof.
Electric cooking appliance, comprise a pot body, pot cover, interior pot, heater, control device and Switching Power Supply; Heater comprises relay temperature control mechanism and controllable silicon temperature control mechanism, the relay temperature control mechanism comprises relay and the first heat-generating pipe be connected with relay, the controllable silicon temperature control mechanism comprises controllable silicon and be controlled by silicon controlled the second heat-generating pipe, and relay and controllable silicon all are controlled by control device; Relay temperature control mechanism and controllable silicon temperature control mechanism coordinate provides heating power.
Further, described control device comprises the voltage effective value testing circuit with the current voltage of testing circuit, detect the zero crossing of voltage and zero cross detection circuit and the control chip of the zero passage interrupt signal of rising edge of generation or trailing edge when voltage over zero at every turn, the real-time voltage of voltage effective value testing circuit output inputs in control chip, in the zero passage interrupt signal input control chip that voltage zero-crossing detection circuit sends, in control chip, be provided with zero passage interrupt signal counter, the output of control chip connects respectively controllable silicon and relay;
Control chip comprises the first computing unit that calculates the first heat-generating pipe power P r according to current voltage, according to current voltage, calculates the second computing unit of the second heat-generating pipe power P t, stores setting power P 0Memory cell, and setting power P relatively 0Comparing unit with the first heat-generating pipe power P r;
Comparing unit calculates P 0With the difference of Pr, also by the ratio of this difference and Pt , be converted to the half wave number N that controllable silicon triggers;
When the number of control chip accumulative total zero passage interrupt signal arrived half wave number, control chip stopped triggering controllable silicon.
Further, the first heat-generating pipe and the second heat-generating pipe are installed in same heat-generating disc.
Further, described Switching Power Supply comprises the safety protective circuit with the mains electricity input end sub-connection, the current rectifying and wave filtering circuit be connected with this safety protective circuit, with current rectifying and wave filtering circuit, be connected, high voltage direct current can be converted to the Unisolated switch power supply of low-voltage DC, with the mu balanced circuit be connected with the Unisolated switch power supply; The voltage effective value testing circuit all is connected with safety protective circuit with voltage zero-crossing detection circuit, and control chip connects the mu balanced circuit that the high ripple DC voltage of power supply output is converted to the required low ripple DC voltage of control chip.
Further, the voltage effective value testing circuit comprises the second commutation diode, the first divider resistance, the second divider resistance, the 3rd divider resistance, the 3rd clamp diode, the 4th filter resistance and the 8th filter capacitor and the 9th filter capacitor; The second commutation diode is connected with safety protective circuit;
The second commutation diode, the first divider resistance and the second divider resistance are connected in series, clamp diode one end is connected with the second divider resistance, another termination mu balanced circuit, connect with the 4th filter resistance serial module structure that forms and the 3rd divider resistance, the 8th filter capacitor of the 9th filter capacitor is in parallel, and the 4th filter resistance is connected with control chip by wire with the end that the 9th filter capacitor is connected; The 3rd divider resistance, the 8th filter capacitor and the 9th filter capacitor one end ground connection.
Further, voltage zero-crossing detection circuit comprises the 5th current-limiting resistance, the 6th current-limiting resistance, the 7th current-limiting resistance, the 4th clamp diode and the 5th clamp diode; The 5th current-limiting resistance, the 6th current-limiting resistance and the 7th current-limiting resistance are connected in series, the plus earth of the 4th clamp diode, negative pole connect the 7th current-limiting resistance, the positive pole of the 5th clamp diode connects the 7th current-limiting resistance, negative pole connects mu balanced circuit, and the 7th current-limiting resistance is connected with the input of control chip.
Further, relay is connected with relay drive circuit, relay drive circuit comprises the 8th resistance, the 9th resistance and the 6th diode, the 8th resistance one end connects the output of control chip, the base stage that the other end connects the first triode, the 9th resistance one end connects the base stage of the first triode, the emitter stage that the other end connects the first triode, the collector connection relay of the first triode; Relay and the 6th diodes in parallel.
Further, controllable silicon is connected with thyristor gating circuit, thyristor gating circuit comprises the second triode, the tenth resistance, the 11 resistance and the 12 resistance, the tenth resistance one end connects the output of control chip, the base stage that the other end connects the second triode, the 11 resistance one end connects the base stage of the second triode, the emitter stage that the other end connects the second triode, and colelctor electrode, the other end that the 12 resistance one end connects the second triode connect controllable silicon.
The method for heating and controlling of described electric cooking appliance comprises the following steps:
1), control chip arranges corresponding power output P according to culinary art pattern and cooking stage that the user selects 0, this power output P 0Be pre-stored in the memory cell of control chip;
2), the voltage effective value testing circuit records current voltage, and by current voltage input control chip, the first computing unit calculates the first heat-generating pipe power P r under current voltage, the second computing unit calculates the second heat-generating pipe power P t under current voltage;
3), comparing unit compares P 0With Pr and calculate P 0With the difference of Pr and the ratio of this difference and Pt , finally will Be converted to the half wave number N that controllable silicon triggers;
4), controllable silicon is while opening, timer is since 0 counting, control chip often receives a zero passage interrupt signal timer from adding one, when the counting of timer arrives half wave number that controllable silicon triggers, stop triggering controllable silicon;
5), the current state of judgement electric cooking appliance, obtain current required power output, deposit current required power output in memory cell, repeated execution of steps 2)-4).
Technical conceive of the present invention is: adopt relay and controllable silicon to control respectively a heat-generating pipe, can change and regulate in time two heat-generating pipe power according to line voltage, make total power output constant.Power stage is flexible simultaneously, can cook needs according to difference, exports suitable firm power.Controllable silicon and relay are used in conjunction with, and controllable silicon is only by a less electric current, and it is too high that temperature rise is unlikely to, and can realize high-power adjusting simultaneously.Silicon controlled power modulation is used zero trigger mode, and power factor is high, and electromagnetic interference is little.
The present invention has advantages of and can high-power adjusting avoid again the controllable silicon temperature rise too high.
The accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Fig. 2 is control circuit block diagram of the present invention.
Fig. 3 is control circuit figure of the present invention.
Fig. 4 is the schematic diagram of heater.
Fig. 5 is the flow chart of method for heating and controlling of the present invention.
The specific embodiment
Embodiment mono-
With reference to Fig. 1-4
Electric cooking appliance, comprise a pot body A, pot cover, interior pot C, heater, control device and Switching Power Supply, heater comprises relay temperature control mechanism and controllable silicon temperature control mechanism, the relay temperature control mechanism comprises relay K 1 and the first heat-generating pipe H1 be connected with relay, and the controllable silicon temperature control mechanism comprises controllable silicon T1 and be controlled by silicon controlled the second heat-generating pipe H2, and relay K 1 and controllable silicon T1 all are controlled by control device; Relay temperature control mechanism and controllable silicon temperature control mechanism coordinate provides heating power.
The relay temperature control mechanism can be comprised of a relay K 1 and first a heat-generating pipe H1; Also can be comprised of a plurality of relay K 1 and a plurality of the first heat-generating pipe H1, each relay K 1 is controlled the first heat-generating pipe H1 of a correspondence.When the relay temperature control mechanism only comprised a relay K 1 and first a heat-generating pipe H1, relay K 1 and controllable silicon T1 opened simultaneously.When the relay temperature control mechanism comprised a plurality of relay K 1 and a plurality of heat-generating pipe H1, control chip first calculates needed the relay quantity of opening, then opens simultaneously corresponding relay K 1 and controllable silicon T1.
Described control device comprises the voltage effective value testing circuit 6 with the current voltage of testing circuit, detect the zero crossing of voltage, and when voltage over zero, produce the zero cross detection circuit 7 of the zero passage interrupt signal of a rising edge or trailing edge at every turn, with control chip 8, the real-time voltage of voltage effective value testing circuit 6 outputs inputs in control chip 8, in the zero passage interrupt signal input control chip 8 that voltage zero-crossing detection circuit 7 sends, in control chip 8, be provided with zero passage interrupt signal counter, the output of control chip 8 connects respectively controllable silicon T1 and relay K 1,
Control chip 8 comprises the first computing unit that calculates the first heat-generating pipe H1 power P r according to current voltage, according to current voltage, calculates the second computing unit of the second heat-generating pipe H2 power P t, storage setting power P 0Memory cell, and setting power P relatively 0Comparing unit with the first heat-generating pipe H1 power P r;
Comparing unit calculates P 0With the difference of Pr and the ratio of this difference and Pt , and will Be converted to the half wave number N that controllable silicon T1 triggers.Half wave number refers to the number of zero passage interrupt signal, and voltage zero-crossing detection circuit 7 often sends a zero passage interrupt signal, and counter is from adding 1, and when counter accumulative total reached half wave number of controllable silicon T1 triggering, control chip 8 stopped triggering controllable silicon T1.
The first heat-generating pipe H1 and the second heat-generating pipe H2 are installed in same heat-generating disc 12.
Described Switching Power Supply comprises and mains electricity input end son 1 safety protective circuit be connected 2, the current rectifying and wave filtering circuit 3 be connected with this safety protective circuit, with current rectifying and wave filtering circuit 3, be connected, high voltage direct current can be converted to the Unisolated switch power supply 4 of low-voltage DC, with the mu balanced circuit 5 be connected with Unisolated switch power supply 4; Voltage effective value testing circuit 6 all is connected with safety protective circuit 2 with voltage zero-crossing detection circuit 7, and control chip 8 connects the mu balanced circuit 5 that the high ripple DC voltage of civil power output is converted to the required low ripple DC voltage of control chip 8.
Voltage effective value testing circuit 6 comprises the second commutation diode D2, the first divider resistance R1, the second divider resistance R2, the 3rd divider resistance R3, the 3rd clamp diode D3, the 4th filter resistance R4 and the 8th filter capacitor C8 and the 9th filter capacitor C9; The second commutation diode D2 is connected with safety protective circuit 2;
The second commutation diode D2, the first divider resistance R1 and the second divider resistance R2 are connected in series, clamp diode one end is connected with the second divider resistance R2, another termination mu balanced circuit, the 9th filter capacitor C9 serial module structure formed of connecting with the 4th filter resistance R4 is in parallel with the 3rd divider resistance R3, the 8th filter capacitor C8, and the end that the 4th filter resistance is connected with the 9th filter capacitor C9 is connected with control chip 8 by wire; The 3rd divider resistance R3, the 8th filter capacitor C8 and the 9th filter capacitor C9 mono-end ground connection.
Voltage zero-crossing detection circuit 7 comprises the 5th current-limiting resistance R5, the 6th current-limiting resistance R6, the 7th current-limiting resistance R7, the 4th clamp diode D4 and the 5th clamp diode D5; The 5th current-limiting resistance R5, the 6th current-limiting resistance R6 and the 7th current-limiting resistance R7 are connected in series, the plus earth of the 4th clamp diode D4, negative pole connect the 7th current-limiting resistance R7, the positive pole of the 5th clamp diode D5 connects the 7th current-limiting resistance R7, negative pole connects mu balanced circuit 5, the seven current-limiting resistance R7 and is connected with the input of control chip 8.
Relay K 1 is connected with relay drive circuit 9, relay drive circuit 9 comprises the 8th resistance R 8, the 9th resistance R 9 and the 6th diode D6, the 8th resistance R 8 one ends connect the output of control chip 8, the base stage that the other end connects the first triode Q1, the 9th resistance R 9 one ends connect the base stage of the first triode Q1, the emitter stage that the other end connects the first triode Q1, the collector connection relay K1 of the first triode Q1;
Relay K 1 is in parallel with the 6th diode D6.
Controllable silicon T1 is connected with thyristor gating circuit 10, thyristor gating circuit 10 comprises the second triode Q2, the tenth resistance R the 10, the 11 resistance R 11 and the 12 resistance R 12, the tenth resistance R 10 1 ends connect the output of control chip 8, the base stage that the other end connects the second triode Q2, the 11 resistance R 11 1 ends connect the base stage of the second triode Q2, the emitter stage that the other end connects the second triode Q2, and colelctor electrode, the other end that the 12 resistance R 12 1 ends connect the second triode Q2 connect controllable silicon T1.
Safety protective circuit 2 comprises fuse Fuse, piezo-resistance ZNR and safety capacitor C 1; Fuse Fuse and mains electricity input end substring connection, piezo-resistance ZNR and safety capacitor C 1 are parallel between the two poles of the earth of power input terminal.When fault causes overcurrent, self fuse and cut off electric current, prevent that security incident from occurring.Piezo-resistance ZNR is connected in parallel between the power input terminal L utmost point and the N utmost point, plays the surge inhibitory action.Safety capacitor C 1 also and between the power input terminal L utmost point and the N utmost point, strobes, and improves circuit reliability.
Current rectifying and wave filtering circuit 3 comprises the first commutation diode D1, filter inductance L1, and the second high-voltage filtering capacitor C2 and third high press filtration ripple capacitor C 3, this current rectifying and wave filtering circuit 3 is π type filter circuit.The first commutation diode D1 carries out halfwave rectifier by civil power, and civil power provides the Switching Power Supply DC input voitage after rectifying and wave-filtering.
Mu balanced circuit 5 comprises the 4th pre-filtering capacitor C 4, the five pre-filtering capacitor C 5, voltage-stabilizing device, the 6th post-filtering capacitor C 6 and the 7th post-filtering capacitor C 7; The 4th pre-filtering capacitor C 4, the 5th pre-filtering capacitor C 5, the 6th post-filtering capacitor C 6 and the 7th post-filtering capacitor C 7 are parallel between the two poles of the earth of power output terminal, two pre-filtering electric capacity all are connected with the input of voltage-stabilizing device, two post-filtering electric capacity all are connected with the output of voltage-stabilizing device, and the input of voltage-stabilizing device is connected with the L utmost point of mains electricity input end.The effect of mu balanced circuit 5 is to convert the high ripple DC voltage V1 of Switching Power Supply output to low ripple DC voltage V2 that control chip 8 needs.
Described Unisolated switch power supply 4 converts high voltage direct current to low-voltage DC, is a high efficiency energy conversion device.No resistance between its output connection and the power input L utmost point, be convenient to drive controllable silicon T1.
Technical conceive of the present invention is: adopt relay K 1 and controllable silicon T1 to control respectively heat-generating pipe, can change and regulate in time two heat-generating pipe power according to line voltage, make total power output constant.Power stage is flexible simultaneously, can cook needs according to difference, exports suitable firm power.This scheme is regulated heating power in real time by controllable silicon, can reduce relay K 1 on-off times, extended the service life of relay K 1, simultaneously, this programme has reduced to flow through the electric current of controllable silicon T1, avoids the silicon controlled temperature rise too high, can be without using heat abstractor or using less heat abstractor, excessive to solve the circuit board accommodation space that needs enough large heat abstractor to bring, the problem of high cost, be conducive to the miniaturization of electric cooking appliance.Zero trigger mode is used in controllable silicon T1 Power Regulation, and power factor is high, and electromagnetic interference is little.
The present invention is applicable to as electric cooker, electric pressure cooking saucepan, electric cooking pot, electric steamer, the various electric cooking appliances such as bread producing machine.
The present invention has the power output of regulating relay K1 and controllable silicon T1 in real time, reaches the required firm power of culinary art, makes the uniform advantage of power stage of heat-generating disc 12.
Embodiment bis-
With reference to Fig. 5
The method for heating and controlling of described electric cooking appliance comprises the following steps:
1), control chip 8 arranges corresponding power output P according to culinary art pattern and cooking stage that the user selects 0, this power output P 0Be pre-stored in the memory cell of control chip 8;
2), voltage effective value testing circuit 6 records current voltage, and by current voltage input control chip 8, the first computing unit calculates the first heat-generating pipe H1 power P r under current voltage, the second computing unit calculates the second heat-generating pipe H2 power P t under current voltage;
3), comparing unit compares P 0With Pr, calculating P 0With the difference of Pr and the ratio of this difference and Pt , finally will Be converted to the half wave number N that controllable silicon T1 triggers;
4), controllable silicon T1 is while opening, timer is since 0 counting, control chip 8 often receives a zero passage interrupt signal timer from adding one, when the counting of timer arrives half wave number that controllable silicon T1 triggers, stop triggering controllable silicon T1;
5), the current state of judgement electric cooking appliance, obtain current required power output, deposit current required power output in memory cell, repeated execution of steps 2)-4).
The described content of this specification embodiment is only enumerating the way of realization of inventive concept; protection scope of the present invention should not be regarded as only limiting to the concrete form that embodiment states, protection scope of the present invention also reaches conceives the equivalent technologies means that can expect according to the present invention in those skilled in the art.

Claims (9)

1. electric cooking appliance, comprise a pot body, pot cover, interior pot, heater, control device and Switching Power Supply, it is characterized in that: heater comprises relay temperature control mechanism and controllable silicon temperature control mechanism, the relay temperature control mechanism comprises relay and the first heat-generating pipe be connected with relay, and the controllable silicon temperature control mechanism comprises controllable silicon and be controlled by silicon controlled the second heat-generating pipe, and relay and controllable silicon all are controlled by control device; Relay temperature control mechanism and controllable silicon temperature control mechanism coordinate provides heating power.
2. electric cooking appliance as claimed in claim 1, it is characterized in that: described control device comprises the voltage effective value testing circuit with the current voltage of testing circuit, detect the zero crossing of voltage, and when voltage over zero, produce zero cross detection circuit and the control chip of the zero passage interrupt signal of a rising edge or trailing edge at every turn, the real-time voltage of voltage effective value testing circuit output inputs in control chip, in the zero passage interrupt signal input control chip that voltage zero-crossing detection circuit sends, in control chip, be provided with zero passage interrupt signal counter, the output of control chip connects respectively controllable silicon and relay, control chip comprises the first computing unit that calculates the first heat-generating pipe power P r according to current voltage, according to current voltage, calculates the second computing unit of the second heat-generating pipe power P t, stores setting power P 0memory cell, and setting power P relatively 0comparing unit with the first heat-generating pipe power P r, comparing unit calculates P 0with the difference of Pr, also by the ratio of this difference and Pt be converted to the half wave number N that controllable silicon triggers, when the number of control chip accumulative total zero passage interrupt signal arrived half wave number, control chip stopped the controllable silicon that sets out.
3. electric cooking appliance as claimed in claim 2, it is characterized in that: the first heat-generating pipe and the second heat-generating pipe are installed in same heat-generating disc.
4. electric cooking appliance as described as one of claim 1-3, it is characterized in that: described Switching Power Supply comprises the safety protective circuit with the mains electricity input end sub-connection, the current rectifying and wave filtering circuit be connected with this safety protective circuit, with current rectifying and wave filtering circuit, be connected, high voltage direct current can be converted to the Unisolated switch power supply of low-voltage DC, with the mu balanced circuit be connected with the Unisolated switch power supply; The voltage effective value testing circuit all is connected with safety protective circuit with voltage zero-crossing detection circuit, and control chip connects the mu balanced circuit that the high ripple DC voltage of civil power output is converted to the required low ripple DC voltage of control chip.
5. electric cooking appliance as claimed in claim 4, it is characterized in that: the voltage effective value testing circuit comprises the second commutation diode, the first divider resistance, the second divider resistance, the 3rd divider resistance, the 3rd clamp diode, the 4th filter resistance and the 8th filter capacitor and the 9th filter capacitor; The second commutation diode is connected with safety protective circuit;
The second commutation diode, the first divider resistance and the second divider resistance are connected in series, clamp diode one end is connected with the second divider resistance, another termination mu balanced circuit, connect with the 4th filter resistance serial module structure that forms and the 3rd divider resistance, the 8th filter capacitor of the 9th filter capacitor is in parallel, and the 4th filter resistance is connected with control chip by wire with the end that the 9th filter capacitor is connected; The 3rd divider resistance, the 8th filter capacitor and the 9th filter capacitor one end ground connection.
6. electric cooking appliance as claimed in claim 5, it is characterized in that: voltage zero-crossing detection circuit comprises the 5th current-limiting resistance, the 6th current-limiting resistance, the 7th current-limiting resistance, the 4th clamp diode and the 5th clamp diode; The 5th current-limiting resistance, the 6th current-limiting resistance and the 7th current-limiting resistance are connected in series, the plus earth of the 4th clamp diode, negative pole connect the 7th current-limiting resistance, the positive pole of the 5th clamp diode connects the 7th current-limiting resistance, negative pole connects mu balanced circuit, and the 7th current-limiting resistance is connected with the input of control chip.
7. electric cooking appliance as claimed in claim 6, it is characterized in that: relay is connected with relay drive circuit, relay drive circuit comprises the 8th resistance, the 9th resistance and the 6th diode, the 8th resistance one end connects the output of control chip, the base stage that the other end connects the first triode, the 9th resistance one end connects the base stage of the first triode, the emitter stage that the other end connects the first triode, the collector connection relay of the first triode;
Relay and the 6th diodes in parallel.
8. electric cooking appliance as claimed in claim 7, it is characterized in that: controllable silicon is connected with thyristor gating circuit, thyristor gating circuit comprises the second triode, the tenth resistance, the 11 resistance and the 12 resistance, the tenth resistance one end connects the output of control chip, the base stage that the other end connects the second triode, the 11 resistance one end connects the base stage of the second triode, the emitter stage that the other end connects the second triode, and colelctor electrode, the other end that the 12 resistance one end connects the second triode connect controllable silicon.
9. the method for heating and controlling of electric cooking appliance as claimed in claim 1 comprises the following steps:
1), control chip arranges corresponding power output P according to culinary art pattern and cooking stage that the user selects 0, this power output P 0Be pre-stored in the memory cell of control chip;
2), the voltage effective value testing circuit records current voltage, and by current voltage input control chip, computing unit calculates the first heat-generating pipe power P r under current voltage;
3), comparing unit compares P 0With Pr and calculate P 0With the difference of Pr and the ratio of this difference and Pt , finally will Be converted to the half wave number N that controllable silicon triggers;
4), controllable silicon is while opening, timer is since 0 counting, control chip often receives a zero passage interrupt signal timer from adding one, when the counting of timer arrives half wave number that controllable silicon triggers, stop triggering controllable silicon;
5), the current state of judgement electric cooking appliance, obtain current required power output, deposit current required power output in memory cell, repeated execution of steps 2)-4).
CN201310331398.2A 2012-09-05 2013-08-01 Electric cooking appliance and its method for heating and controlling Active CN103405161B (en)

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CN2012103255376 2012-09-05
CN 201210325537 CN102846182A (en) 2012-09-05 2012-09-05 Electric cooker and heating control method thereof
CN201310331398.2A CN103405161B (en) 2012-09-05 2013-08-01 Electric cooking appliance and its method for heating and controlling

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CN106208752A (en) * 2015-05-05 2016-12-07 佛山市顺德区美的电热电器制造有限公司 Power control circuit, Poewr control method and electric pressure cooking saucepan
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CN106208752A (en) * 2015-05-05 2016-12-07 佛山市顺德区美的电热电器制造有限公司 Power control circuit, Poewr control method and electric pressure cooking saucepan
CN106208672B (en) * 2015-05-05 2019-07-16 佛山市顺德区美的电热电器制造有限公司 Power control circuit and heating device
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CN105867450B (en) * 2016-04-12 2017-11-14 广东美的厨房电器制造有限公司 Cooking equipment and its control method
CN106455141A (en) * 2016-11-30 2017-02-22 广东美的环境电器制造有限公司 Heating device and household electric appliance
CN108261095A (en) * 2017-01-04 2018-07-10 佛山市顺德区美的电热电器制造有限公司 Method for heating and controlling, device and electric heating equipment
CN108261095B (en) * 2017-01-04 2020-09-01 佛山市顺德区美的电热电器制造有限公司 Heating control method and device and electric heating equipment
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