CN110338630A - Electromagnetic heating cooking utensil and its heating control circuit and control method - Google Patents
Electromagnetic heating cooking utensil and its heating control circuit and control method Download PDFInfo
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- CN110338630A CN110338630A CN201810290875.8A CN201810290875A CN110338630A CN 110338630 A CN110338630 A CN 110338630A CN 201810290875 A CN201810290875 A CN 201810290875A CN 110338630 A CN110338630 A CN 110338630A
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- Prior art keywords
- synchronization signal
- switch
- signal
- power switch
- resonant element
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/24—Warming devices
- A47J36/2483—Warming devices with electrical heating means
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/06—Control, e.g. of temperature, of power
Abstract
The invention discloses a kind of electromagnetic heating cooking utensil and its heating control circuit and control method, the circuit includes: the first resonant element；Second resonant element；First power switch；Second power switch；First synchronization unit, by detecting the both end voltage of the first resonant element to export the first synchronization signal；Second synchronization unit, by detecting the both end voltage of the second resonant element to export the second synchronization signal；Control unit, according to the heating mode of electromagnetic heating cooking utensil, the driving signal of the first power switch of driving is generated by the first synchronization signal of selection, and the driving signal of the second power switch of driving is generated by the second synchronization signal of selection, and the driving signal of driving the first power switch and the second power switch is generated by one in the first synchronization signal of selection and the second synchronization signal, to improve the service life of heating efficiency and power switch.
Description
Technical field
The present invention relates to field of home appliance technology, in particular to the computer heating control electricity of a kind of electromagnetic heating cooking utensil
Road, a kind of electromagnetic heating cooking utensil and a kind of method for heating and controlling of electromagnetic heating cooking utensil.
Background technique
Electromagnetic heating cooking utensil (such as electromagnetic oven, electric cooker, electric pressure cooking saucepan) is most of all to use a coil heats,
Its firepower is largely focused on the bottom of a pan immediate vicinity, since firepower is excessively concentrated, causes heating uneven, user complains culinary art effect
Fruit is poor.
Currently, heat protocol of some cooking pot using the twin coil disk of inner and outer ring shape, two sets of composition are independent
Resonator system, effect are greatly improved, but two sets of resonator systems use synchronous circuit independent, free harmonic vibration work
Make.But this scheme can have a problem that: since inner and outer ring coil panel is placed in inside same cooking pot, between them
It is closer, when two coils work at the same time, the magnetic field between them, which can lead to the problem of to intercouple, is interfered, due to respectively independent
Resonance works asynchronous, sometimes can magnetic field be superimposed in the same direction, sometimes reversed superposition, the Vector Magnetic Field of synthesis is unstable, causes
Synchronous circuit is unstable, and heating efficiency is low, or even can damage switching tube, influences life of product.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
First purpose is to propose a kind of heating control circuit of electromagnetic heating cooking utensil, by increasing optional synchronization signal touching
The two-way resonant heating circuit to rise improves cooking system so as to improve the uniformity of electromagnetic heating cooking utensil heating
Heating efficiency and switching tube working life.
Second object of the present invention is to propose a kind of electromagnetic heating cooking utensil.
Third object of the present invention is to propose a kind of method for heating and controlling of electromagnetic heating cooking utensil.
In order to achieve the above objectives, the first aspect of the present invention embodiment proposes a kind of heating of electromagnetic heating cooking utensil
Control circuit, comprising: the first resonant element；Second resonant element, one end of second resonant element and first resonance
One end of unit is connected to the power supply module of the electromagnetic heating cooking utensil after being connected, wherein the first resonant element packet
The first resonant capacitance and first coil disk being connected in parallel are included, second resonant element includes the second resonance electricity being connected in parallel
Hold and the second coil panel, the first coil disk and second coil panel are arranged in inner and outer ring；First power switch, described
The first end of one power switch is connected with the other end of first resonant element, and first power switch is described for controlling
Whether the first resonant element carries out resonant operational；Second power switch, the first end of second power switch and described second
The other end of resonant element is connected, after the second end of second power switch is connected with the second end of first power switch
Ground connection, second power switch is for controlling whether second resonant element carries out resonant operational；First synchronization unit, institute
The both ends that the first synchronization unit is connected to first resonant element are stated, first synchronization unit is humorous by detecting described first
The both end voltage of vibration unit is to export the first synchronization signal；Second synchronization unit, second synchronization unit are connected to described
The both ends of two resonant elements, second synchronization unit is by detecting the both end voltage of second resonant element to export second
Synchronization signal；Control unit, described control unit include the first synchronization signal detection end, the second synchronization signal detection end, first
Drive output and the second drive output, the output end phase at first synchronization signal detection end and first synchronization unit
Even, second synchronization signal detection end is connected with the output end of second synchronization unit, first drive output and
The control terminal of first power switch is connected, the control terminal phase of second drive output and second power switch
Even, described control unit is according to the heating mode of the electromagnetic heating cooking utensil, by select first synchronization signal with
The driving signal for driving first power switch is generated, and by selecting second synchronization signal to generate driving described the
The driving signal of two power switch, and by select one in first synchronization signal and second synchronization signal with
Generate the driving signal for driving first power switch and second power switch.
The heating control circuit of electromagnetic heating cooking utensil according to the present invention, control unit is according to electromagnetic heating cooking pot
The heating mode of tool by the first synchronization signal of selection to generate the driving signal of the first power switch of driving, and passes through selection
Second synchronization signal is to generate the driving signal of the second power switch of driving, and passes through the first synchronization signal of selection and second together
One in signal is walked to generate the driving signal of driving the first power switch and the second power switch.It as a result, can by increase
The two-way resonant heating circuit of synchronization signal trigger source is selected, so as to improve the heating efficiency and switching tube of cooking system
Working life.
In addition, the heating control circuit of the electromagnetic heating cooking utensil proposed according to that above embodiment of the present invention can also have
There is following additional technical characteristic:
According to one embodiment of present invention, the first coil disk and the second coil panel inductance having the same
Amount, and direction of winding is identical, first resonant capacitance and the second resonant capacitance capacitance having the same.
According to one embodiment of present invention, described control unit includes: the first driving circuit, first driving circuit
Output end be connected with the control terminal of first power switch, first driving circuit is to drive first power to open
What is closed is switched on or off；Second driving circuit, the control of the output end of second driving circuit and second power switch
End is connected, and second driving circuit is to drive being switched on or off for second power switch；Controller, the controller
First control signal is generated according to first synchronization signal, to carry out output drive signal by first driving circuit,
And second control signal is generated according to second synchronization signal, to carry out output driving letter by second driving circuit
Number, and signal is controlled according to a generation third in first synchronization signal and second synchronization signal, with respectively
Pass through first driving circuit and the second driving circuit output drive signal.
According to one embodiment of present invention, the controller includes: the first impulse generator and the second impulse generator；
The first end of first choice switch, the first choice switch is connected with the output end of first synchronization unit, and described first
The second end of selection switch is connected with first impulse generator；Second selection switch, the first of the second selection switch
End is connected with the output end of second synchronization unit, the second end of the second selection switch and second impulse generator
It is connected, the third end of the second selection switch is connected with the third end that the first choice switchs；Third selection switch, it is described
The first end of third selection switch is connected with the output end of first synchronization unit, the second end point of the third selection switch
It is not connected with the third end at the third end of first choice switch and the second selection switch, the third selection switch
Third end is connected with the first end of the second selection switch；Wherein, the controller passes through to first choice switch, institute
It states the second selection switch and third selection switch is controlled, to select first synchronization signal or described second
One in synchronization signal or first synchronization signal and second synchronization signal.
According to one embodiment of present invention, described when the first end of first choice switch is connected to second end
Controller exports first control signal, first resonance by first impulse generator according to first synchronization signal
Unit carries out resonant operational；When the first end of the second selection switch is connected to second end, the controller is according to
Second synchronization signal exports second control signal by second impulse generator, and second resonant element carries out resonance work
Make；When the second end of first choice switch is connected to third end, the second end of the second selection switch and third end connect
When the first end of the logical and described third selection switch is connected to second end, the controller divides according to first synchronization signal
It Tong Guo not first impulse generator and second impulse generator output control signal, first resonant element and institute
It states the second resonant element while carrying out resonant operational；When the second end of first choice switch is connected to third end, described the
It is described when the second end of two selection switches is connected to third end and the second end of third selection switch is connected to third end
Controller is exported by first impulse generator and second impulse generator respectively according to second synchronization signal
Signal is controlled, first resonant element and second resonant element carry out resonant operational simultaneously.
According to one embodiment of present invention, first synchronization unit and second synchronization unit include comparing
Device, and share a detection branch.
In order to achieve the above objectives, second aspect of the present invention embodiment proposes a kind of electromagnetic heating cooking utensil comprising
The heating control circuit of above-mentioned electromagnetic heating cooking utensil.
The electromagnetic heating cooking utensil of the embodiment of the present invention passes through the computer heating control electricity of above-mentioned electromagnetic heating cooking utensil
Road can be improved the heating efficiency of cooking system and the working life of switching tube.
In order to achieve the above objectives, third aspect present invention embodiment proposes a kind of heating control of electromagnetic heating cooking utensil
Method processed, comprising the following steps: receive heating power instruction, and the electromagnetic heating is obtained according to heating power instruction and is cooked
It prepares food the heating mode of utensil；According to the heating mode of the electromagnetic heating cooking utensil, by selecting first synchronization signal
To generate the driving signal for driving first power switch, or by selecting second synchronization signal to generate driving institute
The driving signal of the second power switch is stated, or by selecting one in first synchronization signal and second synchronization signal
A driving signal to generate driving first power switch and second power switch.
The method for heating and controlling of electromagnetic heating cooking utensil according to an embodiment of the present invention receives heating power instruction, and
The heating mode for obtaining electromagnetic heating cooking utensil, and the heating according to electromagnetic heating cooking utensil are instructed according to heating power
Mode generates the driving signal of the first power switch of driving by the first synchronization signal of selection, or same by selection second
Step signal is to generate the driving signal of the second power switch of driving, or passes through the first synchronization signal of selection and the second synchronization signal
In one with generate driving the first power switch and the second power switch driving signal.This method, which can be improved, as a result, cooks
The heating efficiency for system of preparing food and the working life of switching tube.
The advantages of additional aspect of the invention, will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Fig. 1 is the block diagram of the heating control circuit of electromagnetic heating cooking utensil according to an embodiment of the present invention；
Fig. 2 is the schematic diagram of the heating control circuit of electromagnetic heating cooking utensil according to an embodiment of the invention；
Fig. 3 is the block diagram of electromagnetic heating cooking utensil according to an embodiment of the present invention；
Fig. 4 is the flow chart of the method for heating and controlling of electromagnetic heating cooking utensil according to an embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Heating control circuit, the electromagnetic heating of electromagnetic heating cooking utensil proposed by the present invention described with reference to the accompanying drawings
The method for heating and controlling of cooking apparatus and electromagnetic heating cooking utensil.
Fig. 1 is the block diagram of the heating control circuit of electromagnetic heating cooking utensil according to an embodiment of the present invention.Fig. 2
It is the schematic diagram of the heating control circuit of electromagnetic heating cooking utensil according to an embodiment of the invention.
As depicted in figs. 1 and 2, the heating control circuit of the electromagnetic heating cooking utensil of the embodiment of the present invention can include: the
One resonant element 10, the second resonant element 20, the first power switch 30, the second power switch 40, the first synchronization unit 50, second
Synchronization unit 60 and control unit 70.
Wherein, one end of the second resonant element 20 is connected to electromagnetic heating after being connected with one end of the first resonant element 10 and cooks
It prepares food the power supply module 80 of utensil, wherein the first resonant element 10 includes the first resonant capacitance C1 being connected in parallel and first coil
Disk COL1, the second resonant element 20 include the second resonant capacitance C2 and the second coil panel COL2 being connected in parallel, first coil disk
COL1 and the second coil panel COL2 is arranged in inner and outer ring.The first end of first power switch 30 is another with the first resonant element 10
End is connected, and the first power switch 30 is for controlling whether the first resonant element 10 carries out resonant operational.Second power switch 40
First end is connected with the other end of the second resonant element 20, and the of the second end of the second power switch 40 and the first power switch 30
Two ends are grounded after being connected, and the second power switch 40 is for controlling whether the second resonant element 20 carries out resonant operational.First is synchronous
Unit 50 is connected to the both ends of the first resonant element 10, the both ends electricity that the first synchronization unit 50 passes through the first resonant element 10 of detection
Pressure is to export the first synchronization signal.Second synchronization unit 60 is connected to the both ends of the second resonant element 20, the second synchronization unit 60
By detecting the both end voltage of the second resonant element 20 to export the second synchronization signal.
Control unit 70 may include the first synchronization signal detection end SYNC1, the second synchronization signal detection end SYNC2, first
Drive output PPG1 and the second drive output PPG2, the first synchronization signal detection end SYNC1 and the first synchronization unit 50
Output end is connected, and the second synchronization signal detection end SYNC2 is connected with the output end of the second synchronization unit 60, the first drive output
PPG1 is connected with the control terminal of the first power switch 30, the control terminal phase of the second drive output PPG2 and the second power switch 40
Even, control unit 70 is according to the heating mode of electromagnetic heating cooking utensil, by the first synchronization signal of selection to generate driving the
The driving signal of one power switch 30, and believed by the second synchronization signal of selection with the driving for generating the second power switch 40 of driving
Number, and the first power switch 30 and the are driven to generate by one in the first synchronization signal of selection and the second synchronization signal
The driving signal of two power switch 40.
In addition, referring to Fig. 1 and Fig. 2, the heating control circuit of the electromagnetic heating cooking utensil may also include that rectification module 90
With filter module 100, wherein rectification module 90 is made of diode D1~D4, the alternating current for inputting power supply module 80
Be converted to direct current；Filter module 100 is made of inductance L1 and capacitor C3, smooth for converting the pulsating volage of variation to
Voltage.
According to one embodiment of present invention, first coil disk COL1 and the second coil panel COL2 inductance having the same
Amount, and direction of winding is identical, the first resonant capacitance C1 and the second resonant capacitance C2 capacitance having the same.So the first resonance
Unit 10 is identical with resonance frequency of second resonant element 20 when carrying out resonant operational, first coil disk COL1 and the second coil
The magnetic phase that disk COL2 is generated keeps zero phase poor at any one time, and resultant magnetic field is most strong, and heating efficiency highest makes simultaneously
It obtains the first synchronization unit 50 and the second synchronization unit 60 is more stable, the work of the first power switch and the second power switch is more
Safety, effectively increases the service life of power switch.
According to one embodiment of present invention, as shown in Fig. 2, the first synchronization unit 50 and the second synchronization unit 60 can wrap
Comparator is included, and shares a detection branch.That is, the first synchronization unit 50 may include resistance R1, R2, R3, R4, capacitor
C4, C5 and comparator CMP1.Second synchronization unit 60 can include: resistance R1, R2, R5, R6, capacitor C4, C6 and comparator CMP2.
Synchronization unit is made of pressure sampling circuit and comparator, and resistance R1, R2 and capacitor C4 form pressure sampling circuit, for acquiring
The voltage of resonant element A point, the first synchronization unit 50 and the second synchronization unit 60 share the pressure sampling circuit, are respectively used to adopt
Collect the A point voltage of the first resonant element 10 and the second resonant element 20.Resistance R3, R4 and capacitor C5 form pressure sampling circuit,
For acquiring the B point voltage of the first resonant element 10；Resistance R5, R6 and capacitor C6 form pressure sampling circuit, for acquiring the
The C point voltage of two resonant elements 20.Comparator CMP1 is used to compare the A point voltage and B point voltage of the first resonant element 10, with defeated
Synchronization signal out, comparator CMP2 is used to compare the A point voltage and C point voltage of the second resonant element 20, to export synchronization signal.
For example, the non-inverting input terminal voltage of comparator CMP1 is less than reverse input end voltage when A point voltage is greater than B point voltage, compare
Device CMP1 exports low level signal, and when A point voltage is less than B point voltage, the non-inverting input terminal voltage of comparator CMP1 is greater than anti-
To input terminal voltage, comparator CMP1 exports high level signal.
Specifically, receiving heating power instruction set by user, and root after electromagnetic heating cooking utensil works on power
The heating mode for obtaining electromagnetic heating cooking utensil is instructed according to heating power.For example, can control first when heating power is smaller
The work of the corresponding heating system of resonant element 10, or the corresponding heating system work of the second resonant element of control 20；Work as heating
When power is larger, the first resonant element 10 and the corresponding heating system work of the second resonant element 20 can be controlled simultaneously.Control is single
Member 70 is according to heating mode, handover trigger source, for example, when 10 corresponding heating system work (interior lines of the first resonant element of selection
Enclose disk work) when, the first synchronization unit 50 passes through the resonance potential at the sample circuit acquisition both ends first coil disk COL1 (namely the
The voltage at one both ends capacitor C1), to export the first synchronization signal (such as failing edge signal) to control unit 70, control unit 70 is logical
The first drive output PPG1 output effective impulse signal is crossed, to control 30 turn-on and turn-off of the first power switch, the first power
Switch 30 controls the access and disconnection of power supply module 80 and the first resonant element 10 according to driving signal.When the first drive output
When exporting high level signal, the first power switch 30 conducting, the first resonant element 10 accesses power supply module 80, gives first coil disk
COL1 stores energy, and electric field energy is converted electromagnetic energy by the first resonant element 10, and realization adds electromagnetic heating cooking utensil
Heat；When the first drive output exports low level signal, the first power switch 30 is turned off, the first resonant element 10 and power supply mould
Block 80 disconnects.
Similarly, when the corresponding heating system work of the second resonant element of selection 20, control method and the first resonant element
10 is identical；When two heating systems work at the same time, control unit 70 can be respectively according to the first synchronization signal letter synchronous with second
Number control the first resonant element and the second resonant element work at the same time, control method is humorous in combination with the first resonant element 10 and second
The process when unit 20 that shakes works, specific step will be described in detail in the following embodiments.
Further, according to one embodiment of present invention, as shown in Fig. 2, control unit 70 can include: the first driving electricity
Road 71, the second driving circuit 72 and controller 73.Wherein, the control of the output end of the first driving circuit 71 and the first power switch 30
End processed is connected, and the first driving circuit 71 is to drive being switched on or off for the first power switch 30.Second driving circuit 72 it is defeated
Outlet is connected with the control terminal of the second power switch 40, the second driving circuit 72 to drive the second power switch 30 open or
Shutdown.Controller 73 generates first control signal according to the first synchronization signal, to carry out output drive by the first driving circuit 71
Dynamic signal, and second control signal is generated according to the second synchronization signal, to carry out output driving letter by the second driving circuit 72
Number, and signal is controlled according to a generation third in the first synchronization signal and the second synchronization signal, to pass through first respectively
72 output drive signal of driving circuit 71 and the second driving circuit.
That is, driving circuit can receive for converting power switch for the signal level range that controller 73 exports
Level signal range, for example, controller 73 export low level be 0V, high level 5V, the receivable low electricity of power switch
It puts down as 0V, high level 18V, then the first driving circuit 71 is used to controller 73 passing through the first drive output PPG1 output
High level 5V be converted into the receivable high level 18V of the first power switch 30, with drive the first power switch 30 work.
According to one embodiment of present invention, as shown in Fig. 2, controller 73 can include: the first impulse generator 731,
Two impulse generators 732, first choice switch 733, second select switch 734 and third to select switch 735.Wherein, the first choosing
The first end for selecting switch 733 is connected with the output end of the first synchronization unit 50, the second end of first choice switch 733 and the first arteries and veins
Generator 731 is rushed to be connected.The first end of second selection switch 734 is connected with the output end of the second synchronization unit 60, the second selection
The second end of switch 734 is connected with the second impulse generator 732, and the third end of the second selection switch 734 and first choice switch
733 third end is connected.The first end of third selection switch 735 is connected with the output end of the first synchronization unit 50, third selection
The second end of switch 735 is connected with the third end at the third end of first choice switch 733 and the second selection switch 734 respectively, the
The third end of three selection switches 735 is connected with the first end of the second selection switch 734.Wherein, controller 73 is by selecting first
Selecting switch 733, second selects switch 734 and third selection switch 735 to be controlled, with the first synchronization signal of selection or the
One in two synchronization signals or the first synchronization signal and the second synchronization signal.
Further, according to one embodiment of present invention, when the first end of first choice switch 733 is connected to second end
When, controller 73 exports first control signal, the first resonant element by the first impulse generator 731 according to the first synchronization signal
10 carry out resonant operational.When the first end of the second selection switch 734 is connected to second end, controller 73 is according to the second synchronous letter
Number by the second impulse generator 732 export second control signal, the second resonant element 20 carry out resonant operational.Work as first choice
The second end of switch 733 is connected to third end, the second end of the second selection switch 734 is connected to third end and third selection is opened
When the first end of pass 735 is connected to second end, controller 73 passes through the first impulse generator according to the first synchronization signal respectively
731 and the second output control signal of impulse generator 732, the first resonant element 10 and the second resonant element 20 carry out resonance simultaneously
Work.When the second end of first choice switch 733 is connected to third end, the second end of the second selection switch 734 and third end connect
When the second end of logical and third selection switch 735 is connected to third end, controller 73 passes through respectively according to the second synchronization signal
First impulse generator 731 and the second impulse generator 732 output control signal, the first resonant element 10 and the second resonant element
20 carry out resonant operational simultaneously.
Process when first coil disk and the work of the second coil panel is described in detail below.
(1) course of work of first coil disk (interior loop disk) heating mode.
1. 2. the first end of first choice switch 733 is connected with second end, the first synchronization signal passes through the first synchronization signal
Input terminal SYNC1 is sent to the Trg1 input terminal of the first impulse generator 731 through first choice switch 733.73 set of controller
START1 flag bit inputs a trigger signal (the first synchronization signal) to the Trg1 input terminal of the first impulse generator 731, opens
Move first pulse output.
Stage 1, controller 73 control the first impulse generator 731 according to the first synchronization signal and export first control signal,
That is useful signal, the present embodiment useful signal are high level 5V, and invalid signals are low level 0V), the output of the first driving circuit 71
High level signal (such as 18V), the pole C (collector) of the first power switch 30 and the pole E (emitter) connection conducting, the first resonance list
First coil disk COL1 in member 10 obtains electric energy from power supply module 80, and electric current is started from scratch linear increase, when by one section
Between after t1, current value reaches I1, at this point, A point voltage is greater than B point voltage, comparator CMP1 reverse side voltage is higher than in-phase end electricity
Pressure, comparator CMP1 output end export low level signal.
Stage 2, later, controller 73 control the first impulse generator 731 output invalid signals (such as 0V), the first driving electricity
Road 71 exports low level signal (such as 0V), and the pole C and the pole E of the first power switch 30 disconnect, due to first coil disk COL1
Electric current cannot be mutated, the electric current of first coil disk COL1 flows through the first resonant capacitance C1, while the first resonant capacitance C1 is to
One coil panel COL1 discharges, and the first resonant capacitance C1 ends A point voltage and B point voltage gradually decrease, when the first resonance electricity
When appearance C1 ends A point voltage and B point voltage are 0V, first coil disk COL1 electric current reaches maximum value.Subsequent time, first coil
The characteristic that disk COL1 maintains electric current that cannot be mutated charges to the first resonant capacitance C1,1 ends A point voltage of the first resonant capacitance
Less than B point voltage, comparator CMP1 in-phase end voltage is higher than reverse side voltage, and comparator CMP1 output end exports one by low electricity
Put down the rising edge voltage energizing signal of high level.
In the stage 3, first coil disk COL1's is gradually reduced to 0 to the first resonant capacitance C1 charging current, the first resonance electricity
The voltage for holding the both ends C1 reaches maximum value, and A point voltage is less than B point voltage.Later, the first resonant capacitance C1 is to first coil disk
COL1 discharges, and when the first resonant capacitance C1 both end voltage is discharged to 0V, first coil disk COL1 electric current reaches maximum value.
Subsequent time, the characteristic that first coil disk COL1 maintains electric current that cannot be mutated charge to the first resonant capacitance C1, and first is humorous
The capacitor C1 ends A point voltage that shakes is greater than B point voltage, and comparator CMP1 reverse side voltage is higher than in-phase end voltage, comparator CMP1
Output end exports one by high level to low level failing edge voltage energizing signal.
After this failing edge voltage energizing signal is input to the first synchronization signal detection end SYNC1 of controller 73, by
One selection switch 733 is sent to the Trg1 input terminal of the first impulse generator 731, and the first impulse generator of automatic trigger 731 exports
The useful signal in next period, 1 process of duplication stages.To realize the resonance heating of interior loop disk.
The course of work of (2) second coil panels (exterior loop disk) heating mode.
1. 2. foot and second end are connected the first end of second selection switch 734, and the second synchronization signal passes through the second synchronous letter
Number input terminal SYNC2 is sent to the Trg2 input terminal of the second impulse generator 732 through the second selection switch 734.73 set of controller
START2 flag bit inputs a trigger signal (the second synchronization signal) to the Trg2 input terminal of the second impulse generator of arteries and veins 732,
Start first pulse output.
Stage 1, controller 73 control the second impulse generator 732 according to the second synchronization signal and export second control signal,
That is useful signal, the second driving circuit 72 export high level signal (such as 18V), and the pole C of the second power switch 40 is connected with the pole E leads
Logical, the second coil panel COL2 in the second resonant element 20 obtains electric energy from power supply module 80, and electric current is started from scratch linear increasing
Greatly, after t1 ' after a period of time, current value reaches I1, at this point, A point voltage is greater than C point voltage, comparator CMP2 reverse side electricity
Pressure is higher than in-phase end voltage, and comparator CMP2 output end exports low level signal.
Stage 2, later, controller 73 control the second impulse generator 732 output invalid signals (such as 0V), the second driving electricity
Road 72 exports low level signal (such as 0V), and the pole C and the pole E of the second power switch 40 disconnect, due to the second coil panel COL2
Electric current cannot be mutated, the electric current of the second coil panel COL2 flows through the second resonant capacitance C2, while the second capacitor C2 is to the second line
Circle disk COL2 discharges, and the second capacitor C2 ends A point voltage and C point voltage gradually decrease, when the second capacitor C2 ends A point electricity
When pressure and C point voltage are 0V, the second coil panel COL2 electric current reaches maximum value.Subsequent time, the second coil panel COL2 maintain electricity
The characteristic that stream cannot be mutated charges to the second capacitor C2, and the second capacitor C3 ends A point voltage is less than C point voltage, comparator
CMP2 in-phase end voltage is higher than reverse side voltage, and comparator CMP2 output end exports a rising edge by low level to high level
Voltage energizing signal.
In the stage 3, the second coil panel COL2's is gradually reduced to 0 to the second capacitor C2 charging current, the second both ends capacitor C2
Voltage reach maximum value, A point voltage is less than C point voltage.Later, the second capacitor C2 discharges to the second coil panel COL2,
When the second capacitor C2 both end voltage is discharged to 0V, the second coil panel COL2 electric current reaches maximum value.Subsequent time, the second coil
The characteristic that disk COL2 maintains electric current that cannot be mutated charges to the second capacitor C2, and the second resonant capacitance C2 ends A point voltage is big
In C point voltage, comparator CMP2 reverse side voltage is higher than in-phase end voltage, and comparator CMP2 output end exports one by high level
To low level failing edge voltage energizing signal.
After this failing edge voltage energizing signal is input to the second synchronization signal detection end SYNC2 of controller 73, by
Two selection switches 734 are sent to the Trg2 input terminal of the second impulse generator 732, and the second impulse generator of automatic trigger 732 exports
The useful signal in next period, 1 process of duplication stages.To realize the resonance heating of exterior loop disk.
(3) inner and outer ring coil panel simultaneously heating mode (controller according to the first synchronization signal control the first resonant element and
Second resonant element works at the same time) course of work.
Third select switch 735 first end 1. 2. foot and second end are connected, the second end of first choice switch 733 2. with
3. third end is connected, 2. 3. the second end of the second selection switch 734 is connected with third end, the first synchronization signal is opened through first choice
The Trg1 input terminal of the first impulse generator 731 is sent to after the 733, second selection switch 734 of pass and third selection switch 735 respectively
With the Trg2 input terminal of the second impulse generator 732.73 set START1, START2 flag bit of controller is sent out to the first pulse
The Trg1 input terminal of raw device 731 and the Trg2 input terminal of the second impulse generator 732 input a trigger signal (the first synchronous letter
Number), start first pulse output.
Stage 1, controller 73 control the first impulse generator 731 and the second impulse generator according to the first synchronization signal
732 export useful signal simultaneously, and the first driving circuit 71 and the second driving circuit 72 export high level signal (such as 18V) respectively,
First power switch 30 and the second power switch 40 simultaneously turn on, and the course of work thereafter is identical as above-mentioned inner ring, outer ring work,
Difference is that the first synchronization signal is sent to the Trg1 input terminal of the first impulse generator 731 respectively after internal selection switch
With the Trg2 input terminal of the second impulse generator 732, the first impulse generator 731 and the second arteries and veins are triggered using the first synchronization signal
The useful signal that generator 732 exports next period is rushed, then 1 process of duplication stages.Pass through the first synchronization signal to realize
Control the resonance heating simultaneously of inner and outer rings coil panel.
(4) inner and outer rings coil panel simultaneously heating mode (controller according to the second synchronization signal control the first resonant element and
Second resonant element works at the same time) course of work.
2. 3. the second end of third selection switch 735 is connected with third end, the second end of first choice switch 733 is 2. with the
3. three ends are connected, 2. 3. the second end of the second selection switch 734 is connected with third end, the second synchronization signal is switched through first choice
733, second selection switch 734 and third select switch 735 after be sent to respectively the first impulse generator 731 Trg1 input terminal and
The Trg2 input terminal of second impulse generator 732.73 set START1, START2 flag bit of controller, to the first pulse generation
The Trg2 input terminal of the Trg1 input terminal of device 731 and the second impulse generator 732 inputs a trigger signal (the second synchronous letter
Number), start first pulse output.
Stage 1, controller 73 control the first impulse generator 731 and the second impulse generator according to the second synchronization signal
732 export useful signal simultaneously, and the first driving circuit 71 and the second driving circuit 72 export high level signal (such as 18V) respectively,
First power switch 30 and the second power switch 40 simultaneously turn on, and the course of work thereafter is identical as above-mentioned inner ring, outer ring work,
Difference is that the second synchronization signal is sent to the Trg1 input terminal of the first impulse generator 731 respectively after internal selection switch
With the Trg2 input terminal of the second impulse generator 732, the first impulse generator 731 and the second arteries and veins are triggered using the second synchronization signal
The useful signal that generator 732 exports next period is rushed, then 1 process of duplication stages.Pass through the first synchronization signal to realize
Control the resonance heating simultaneously of inner and outer rings coil panel.
By upper (1)-(4) it is found that when inner and outer rings monocycle coil panel works, controller 73 selects its own resonant element
Synchronous triggering signal is controlled, and when work is equivalent to the cooking pot of unicoil disk heating, controls two resonant elements alternating works
The mode of work can make cooking pot heating more uniform.When inner and outer ring coil panel heats simultaneously, controller 73 according to system configuration,
Two impulse generators use identical synchronous trigger source, and it is defeated that trigger source can choose the first synchronization signal detection end SYNC1
The first synchronization signal entered or the second synchronization signal of the second synchronization signal detection end SYNC2 input use the same synchronous letter
Number triggering the first impulse generator and the second impulse generator, so that the first power switch 30 and the second power switch 40 are led simultaneously
It is logical, it simultaneously turns off, turns off later resonance simultaneously.And first coil disk COL1 and the second coil panel COL2 uses identical inductance
Amount, and direction of winding is identical, the capacitance of first capacitor C1 and the second capacitor C2 are identical, the resonance frequency phase of two resonant elements
Together, the magnetic phase any moment that two coil panels generate keeps zero phase poor, and resultant magnetic field is most strong, heating efficiency highest,
Stablize synchronous circuit, power switch work is safer, improves the service life of power switch.
In conclusion the heating control circuit of electromagnetic heating cooking utensil according to the present invention, control unit is according to electromagnetism
The heating mode of heating appliance for cooking generates the driving signal of the first power switch of driving by the first synchronization signal of selection,
And the driving signal of the second power switch of driving is generated by the second synchronization signal of selection, and pass through the synchronous letter of selection first
Number and the second synchronization signal in one with generate driving the first power switch and the second power switch driving signal.As a result,
The two-way resonant heating circuit of synchronization signal trigger source may be selected, by increasing so as to improve the heating efficiency of cooking system
With the working life of switching tube.
Fig. 3 is the block diagram of electromagnetic heating cooking utensil according to an embodiment of the present invention.As shown in figure 3, the electromagnetism
Heating appliance for cooking 1000 may include the heating control circuit 1100 of above-mentioned electromagnetic heating cooking utensil.
The electromagnetic heating cooking utensil of the embodiment of the present invention passes through the computer heating control electricity of above-mentioned electromagnetic heating cooking utensil
Road can be improved the heating efficiency of cooking system and the working life of switching tube.
Fig. 4 is the flow chart of the method for heating and controlling of electromagnetic heating cooking utensil according to an embodiment of the present invention.Such as Fig. 4 institute
Show, the method for heating and controlling of the electromagnetic heating cooking utensil can comprise the following steps that
S1 receives heating power instruction, and instructs the heating mode for obtaining electromagnetic heating cooking utensil according to heating power.
S2, according to the heating mode of electromagnetic heating cooking utensil, by the first synchronization signal of selection to generate driving first
The driving signal of power switch, or by the second synchronization signal of selection to generate the driving signal for driving the second power switch,
Or by one in the first synchronization signal of selection and the second synchronization signal to generate the first power switch of driving and the second function
The driving signal of rate switch.
According to one embodiment of present invention, electromagnetic heating cooking utensil can include: the first driving circuit, the first driving electricity
The output end on road is connected with the control terminal of the first power switch, the first driving circuit to drive the first power switch open or
Shutdown；Second driving circuit, the output end of the second driving circuit are connected with the control terminal of the second power switch, the second driving circuit
To drive being switched on or off for the second power switch；Controller, controller, which generates the first control according to the first synchronization signal, to be believed
Number, to carry out output drive signal by the first driving circuit, and second control signal is generated according to the second synchronization signal, with logical
It crosses the second driving circuit and carries out output drive signal, and according to a generation in the first synchronization signal and the second synchronization signal
Third controls signal, to pass through the first driving circuit and the second driving circuit output drive signal respectively, wherein controller packet
It includes: the first impulse generator and the second impulse generator；The first end of first choice switch, first choice switch is synchronous with first
The output end of unit is connected, and the second end of first choice switch is connected with the first impulse generator；Second selection switch, the second choosing
The first end for selecting switch is connected with the output end of the second synchronization unit, the second end and the second impulse generator of the second selection switch
It is connected, the third end of the second selection switch is connected with the third end that first choice switchs；Third selection switch, third selection switch
First end be connected with the output end of the first synchronization unit, the second end of third selection switch respectively with first choice switch the
Three ends are connected with the third end of the second selection switch, the first end phase at the third end of third selection switch and the second selection switch
Even；Also, controller is by switching first choice, the second selection switch and third selection switch control, to select the
One in one synchronization signal or the second synchronization signal or the first synchronization signal and the second synchronization signal.
According to one embodiment of present invention, when the first end of first choice switch is connected to second end, controller root
First control signal is exported by the first impulse generator according to the first synchronization signal, the first resonant element carries out resonant operational；When
When the first end of second selection switch is connected to second end, controller is defeated by the second impulse generator according to the second synchronization signal
Second control signal out, the second resonant element carry out resonant operational；When the second end of first choice switch is connected to third end, the
When the second end of two selection switches is connected to third end and the first end of third selection switch is connected to second end, controller root
According to the first synchronization signal, pass through the first impulse generator and the second impulse generator output control signal, the first resonance list respectively
Member and the second resonant element carry out resonant operational simultaneously；When the second end of first choice switch is connected to third end, the second selection
When the second end of switch is connected to third end and the second end of third selection switch is connected to third end, controller is according to second
Synchronization signal passes through the first impulse generator and the second impulse generator output control signal, the first resonant element and the respectively
Two resonant elements carry out resonant operational simultaneously.
It should be noted that undisclosed thin in the method for heating and controlling of the electromagnetic heating cooking utensil of the embodiment of the present invention
Section, please refers to details disclosed in the heating control circuit of the electromagnetic heating cooking utensil of the embodiment of the present invention, specifically here
It repeats no more.
The method for heating and controlling of electromagnetic heating cooking utensil according to an embodiment of the present invention receives heating power instruction, and
The heating mode for obtaining electromagnetic heating cooking utensil, and the heating according to electromagnetic heating cooking utensil are instructed according to heating power
Mode generates the driving signal of the first power switch of driving by the first synchronization signal of selection, or same by selection second
Step signal is to generate the driving signal of the second power switch of driving, or passes through the first synchronization signal of selection and the second synchronization signal
In one with generate driving the first power switch and the second power switch driving signal.This method, which can be improved, as a result, cooks
The heating efficiency for system of preparing food and the working life of switching tube.
It should be appreciated that each section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned
In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realized.It, and in another embodiment, can be under well known in the art for example, if realized with hardware
Any one of column technology or their combination are realized: having a logic gates for realizing logic function to data-signal
Discrete logic, with suitable combinational logic gate circuit specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
In addition, in the description of the present invention, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ",
"upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " clockwise ", " inverse time
The orientation or positional relationship of the instructions such as needle ", " axial direction ", " radial direction ", " circumferential direction " is to be based on the orientation or positional relationship shown in the drawings,
Be merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. a kind of heating control circuit of electromagnetic heating cooking utensil characterized by comprising
First resonant element；
Second resonant element, one end of second resonant element are connected to institute after being connected with one end of first resonant element
State the power supply module of electromagnetic heating cooking utensil, wherein first resonant element includes the first resonant capacitance being connected in parallel
With first coil disk, second resonant element includes the second resonant capacitance and the second coil panel being connected in parallel, and described first
Coil panel and second coil panel are arranged in inner and outer ring；
First power switch, the first end of first power switch is connected with the other end of first resonant element, described
First power switch is for controlling whether first resonant element carries out resonant operational；
Second power switch, the first end of second power switch is connected with the other end of second resonant element, described
The second end of second power switch is grounded after being connected with the second end of first power switch, and second power switch is used for
Control whether second resonant element carries out resonant operational；
First synchronization unit, first synchronization unit are connected to the both ends of first resonant element, and described first synchronizes list
Member is by detecting the both end voltage of first resonant element to export the first synchronization signal；
Second synchronization unit, second synchronization unit are connected to the both ends of second resonant element, and described second synchronizes list
Member is by detecting the both end voltage of second resonant element to export the second synchronization signal；
Control unit, described control unit are defeated including the first synchronization signal detection end, the second synchronization signal detection end, the first driving
Outlet and the second drive output, first synchronization signal detection end are connected with the output end of first synchronization unit, institute
It states the second synchronization signal detection end to be connected with the output end of second synchronization unit, first drive output and described the
The control terminal of one power switch is connected, and second drive output is connected with the control terminal of second power switch, described
Control unit is driven according to the heating mode of the electromagnetic heating cooking utensil by selection first synchronization signal with generating
The driving signal of first power switch, and opened by selecting second synchronization signal with generating driving second power
The driving signal of pass, and driving is generated by selecting one in first synchronization signal and second synchronization signal
The driving signal of first power switch and second power switch.
2. the heating control circuit of electromagnetic heating cooking utensil as described in claim 1, which is characterized in that the first coil
Disk and the second coil panel inductance having the same, and direction of winding is identical, first resonant capacitance and described second
Resonant capacitance capacitance having the same.
3. the heating control circuit of electromagnetic heating cooking utensil as claimed in claim 1 or 2, which is characterized in that the control
Unit includes:
First driving circuit, the output end of first driving circuit is connected with the control terminal of first power switch, described
First driving circuit is to drive being switched on or off for first power switch；
Second driving circuit, the output end of second driving circuit is connected with the control terminal of second power switch, described
Second driving circuit is to drive being switched on or off for second power switch；
Controller, the controller generate first control signal according to first synchronization signal, to drive by described first
Circuit carries out output drive signal, and generates second control signal according to second synchronization signal, to drive by described second
Dynamic circuit carries out output drive signal, and according to a generation in first synchronization signal and second synchronization signal
Third controls signal, to pass through first driving circuit and the second driving circuit output drive signal respectively.
4. the heating control circuit of electromagnetic heating cooking utensil as claimed in claim 3, which is characterized in that the controller packet
It includes:
First impulse generator and the second impulse generator；
The first end of first choice switch, the first choice switch is connected with the output end of first synchronization unit, described
The second end of first choice switch is connected with first impulse generator；
The first end of second selection switch, the second selection switch is connected with the output end of second synchronization unit, described
The second end of second selection switch is connected with second impulse generator, the third end and described that second selection switchs
The third end of one selection switch is connected；
The first end of third selection switch, the third selection switch is connected with the output end of first synchronization unit, described
The third end that the second end of third selection switch is switched with the third end of first choice switch and second selection respectively
It is connected, the third end of the third selection switch is connected with the first end of the second selection switch；
Wherein, the controller passes through to first choice switch, the second selection switch and third selection switch
It is controlled, to select first synchronization signal or second synchronization signal or first synchronization signal and institute
State one in the second synchronization signal.
5. the heating control circuit of electromagnetic heating cooking utensil as claimed in claim 4, which is characterized in that
When the first end of first choice switch is connected to second end, the controller is logical according to first synchronization signal
The first impulse generator output first control signal is crossed, first resonant element carries out resonant operational；
When the first end of the second selection switch is connected to second end, the controller is logical according to second synchronization signal
The second impulse generator output second control signal is crossed, second resonant element carries out resonant operational；
When the second end of first choice switch is connected to third end, the second end of the second selection switch and third end connect
When the first end of the logical and described third selection switch is connected to second end, the controller divides according to first synchronization signal
It Tong Guo not first impulse generator and second impulse generator output control signal, first resonant element and institute
It states the second resonant element while carrying out resonant operational；
When the second end of first choice switch is connected to third end, the second end of the second selection switch and third end connect
When the second end of the logical and described third selection switch is connected to third end, the controller divides according to second synchronization signal
It Tong Guo not first impulse generator and second impulse generator output control signal, first resonant element and institute
It states the second resonant element while carrying out resonant operational.
6. the heating control circuit of electromagnetic heating cooking utensil as described in claim 1, which is characterized in that described first is synchronous
Unit and second synchronization unit include comparator, and share a detection branch.
7. a kind of electromagnetic heating cooking utensil, which is characterized in that including electromagnetic heating such as of any of claims 1-6
The heating control circuit of cooking apparatus.
8. a kind of method for heating and controlling of electromagnetic heating cooking utensil as claimed in claim 7, which is characterized in that including following
Step:
Heating power instruction is received, and obtains the heated mould of the electromagnetic heating cooking utensil according to heating power instruction
Formula；
According to the heating mode of the electromagnetic heating cooking utensil, by selecting first synchronization signal to generate described in driving
The driving signal of first power switch, or by selecting second synchronization signal to generate driving second power switch
Driving signal, or generates by selecting one in first synchronization signal and second synchronization signal and drives institute
State the driving signal of the first power switch and second power switch.
9. the method for heating and controlling of electromagnetic heating cooking utensil as claimed in claim 8, which is characterized in that the electromagnetic heating
Cooking apparatus includes:
First driving circuit, the output end of first driving circuit is connected with the control terminal of first power switch, described
First driving circuit is to drive being switched on or off for first power switch；
Second driving circuit, the output end of second driving circuit is connected with the control terminal of second power switch, described
Second driving circuit is to drive being switched on or off for second power switch；
Controller, the controller generate first control signal according to first synchronization signal, to drive by described first
Circuit carries out output drive signal, and generates second control signal according to second synchronization signal, to drive by described second
Dynamic circuit carries out output drive signal, and according to a generation in first synchronization signal and second synchronization signal
Third controls signal, to pass through first driving circuit and the second driving circuit output drive signal respectively, wherein institute
Stating controller includes:
First impulse generator and the second impulse generator；
The first end of first choice switch, the first choice switch is connected with the output end of first synchronization unit, described
The second end of first choice switch is connected with first impulse generator；
The first end of second selection switch, the second selection switch is connected with the output end of second synchronization unit, described
The second end of second selection switch is connected with second impulse generator, the third end and described that second selection switchs
The third end of one selection switch is connected；
The first end of third selection switch, the third selection switch is connected with the output end of first synchronization unit, described
The third end that the second end of third selection switch is switched with the third end of first choice switch and second selection respectively
It is connected, the third end of the third selection switch is connected with the first end of the second selection switch；
Also, the controller passes through to first choice switch, the second selection switch and third selection switch
It is controlled, to select first synchronization signal or second synchronization signal or first synchronization signal and institute
State one in the second synchronization signal.
10. the method for heating and controlling of electromagnetic heating cooking utensil as claimed in claim 9, which is characterized in that
When the first end of first choice switch is connected to second end, the controller is logical according to first synchronization signal
The first impulse generator output first control signal is crossed, first resonant element carries out resonant operational；
When the first end of the second selection switch is connected to second end, the controller is logical according to second synchronization signal
The second impulse generator output second control signal is crossed, second resonant element carries out resonant operational；
When the second end of first choice switch is connected to third end, the second end of the second selection switch and third end connect
When the first end of the logical and described third selection switch is connected to second end, the controller divides according to first synchronization signal
It Tong Guo not first impulse generator and second impulse generator output control signal, first resonant element and institute
It states the second resonant element while carrying out resonant operational；
When the second end of first choice switch is connected to third end, the second end of the second selection switch and third end connect
When the second end of the logical and described third selection switch is connected to third end, the controller divides according to second synchronization signal
It Tong Guo not first impulse generator and second impulse generator output control signal, first resonant element and institute
It states the second resonant element while carrying out resonant operational.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810290875.8A CN110338630B (en) | 2018-04-03 | 2018-04-03 | Electromagnetic heating cooking utensil and heating control circuit and control method thereof |
| EP18913373.9A EP3749055B1 (en) | 2018-04-03 | 2018-10-16 | Electromagnetically heated cooking utensil, and heating control circuit and method therefor |
| JP2020540796A JP7027562B2 (en) | 2018-04-03 | 2018-10-16 | Electromagnetic heating cookware, its heating control circuit and control method |
| US16/977,819 US11751292B2 (en) | 2018-04-03 | 2018-10-16 | Electromagnetically heated cooking utensil, and heating control circuit and method therefor |
| PCT/CN2018/110440 WO2019192157A1 (en) | 2018-04-03 | 2018-10-16 | Electromagnetically heated cooking utensil, and heating control circuit and method therefor |
| KR1020207022184A KR102327494B1 (en) | 2018-04-03 | 2018-10-16 | Electromagnetic heating cooker, heating control circuit and control method of electromagnetic heating cooker |
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| CN201810290875.8A CN110338630B (en) | 2018-04-03 | 2018-04-03 | Electromagnetic heating cooking utensil and heating control circuit and control method thereof |
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| CN110338630A true CN110338630A (en) | 2019-10-18 |
| CN110338630B CN110338630B (en) | 2020-11-20 |
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Cited By (3)
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| CN111432512A (en) * | 2020-04-16 | 2020-07-17 | 深圳市鑫汇科股份有限公司 | Electromagnetic heating equipment and heating control device and method thereof |
| CN113133145A (en) * | 2019-12-31 | 2021-07-16 | 广东美的生活电器制造有限公司 | Cooking appliance, drive control circuit and control method |
| CN113784470A (en) * | 2021-08-31 | 2021-12-10 | 河北工业大学 | Induction heating system based on LLC |
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