CN113133145B - Cooking appliance, drive control circuit and control method - Google Patents
Cooking appliance, drive control circuit and control method Download PDFInfo
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- CN113133145B CN113133145B CN201911420849.3A CN201911420849A CN113133145B CN 113133145 B CN113133145 B CN 113133145B CN 201911420849 A CN201911420849 A CN 201911420849A CN 113133145 B CN113133145 B CN 113133145B
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- 238000010411 cooking Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 111
- 230000009467 reduction Effects 0.000 claims abstract description 7
- 230000001360 synchronised effect Effects 0.000 claims description 15
- 230000001939 inductive effect Effects 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims 3
- 238000000429 assembly Methods 0.000 claims 3
- 230000005672 electromagnetic field Effects 0.000 abstract description 25
- 101100464782 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) CMP2 gene Proteins 0.000 description 13
- 101100464779 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) CNA1 gene Proteins 0.000 description 12
- 238000010586 diagram Methods 0.000 description 8
- 101100166455 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) ccg-4 gene Proteins 0.000 description 7
- 101150114608 PPG1 gene Proteins 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 102100036285 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Human genes 0.000 description 3
- 101000875403 Homo sapiens 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Proteins 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Classifications
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- 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
- H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
- H05B6/065—Control, e.g. of temperature, of power for cooking plates or the like using coordinated control of multiple induction coils
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- Electromagnetism (AREA)
- Induction Heating Cooking Devices (AREA)
Abstract
The invention provides a cooking appliance, a drive control circuit and a control method, wherein the drive control circuit of the cooking appliance comprises: a resonant circuit, the resonant circuit comprising: the first resonant assembly is arranged on the first side of the first heating plate; the second resonance component is arranged on the first side of the second heating plate; the driver circuit is connected to the control end of the resonant circuit and is configured to synchronously drive the first resonant assembly and the second resonant assembly and to carry out frequency reduction treatment and/or amplitude variation treatment on the first resonant assembly and the second resonant assembly, wherein the second side of the first heating plate and the second side of the second heating plate are arranged oppositely, and the first resonant assembly and the second resonant assembly are synchronously driven by controlling the driving control circuit so as to reduce electromagnetic field crosstalk between the first resonant assembly and the second resonant assembly, and further improve the reliability and the cooking efficiency of the cooking appliance.
Description
Technical Field
The invention relates to the technical field of drive control, in particular to a cooking utensil and a drive control circuit.
Background
The electric baking pan is a tool for cooking food, can realize the heating of a single heating plate or the simultaneous heating of an upper heating plate and a lower heating plate, and ensures that the food between the two heating plates is heated at high temperature.
In order to realize heating uniformity, a heating plate heating mode is adopted by a conventional electric baking pan, and heating is performed through a resistance wire arranged on the heating plate, however, the heating plate is in a conduction mode, and the resistance wire has the problem of low efficiency, so that the defect of slow food frying and baking exists.
In the related art, in order to increase the heating speed, research and development personnel put forward an electric baking pan of an electromagnetic heating principle, and the upper and lower heating plates are heated rapidly through electromagnetic heating, so that the purpose of quick frying and baking is achieved.
However, the upper and lower heating plates are all electromagnetically heated, so that 2 coil plates are needed, and the upper and lower heating plates are simultaneously heated, so that high-speed alternating electromagnetic fields of the upper and lower heating plates have certain overlapping, and even electromagnetic heating signals are disordered and even a drive control circuit is damaged due to mutual inductance of the coil magnetic fields.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art or related art.
To this end, a first aspect of the present invention is to provide a driving control circuit of a cooking appliance.
A second aspect of the present invention is to provide a control method of a cooking appliance.
A third aspect of the present invention is to provide a cooking appliance.
In view of this, according to a first aspect of the present invention, there is provided a drive control circuit of a cooking appliance, comprising: a resonant circuit, the resonant circuit comprising: the first resonant assembly is arranged on the first side of the first heating plate; the second resonance component is arranged on the first side of the second heating plate; and the driver circuit is connected to the control end of the resonant circuit and is configured to synchronously drive the first resonant assembly and the second resonant assembly and perform frequency reduction treatment and/or amplitude variation treatment on the first resonant assembly and the second resonant assembly, wherein the second side of the first heating plate is opposite to the second side of the second heating plate.
According to the control scheme for controlling the cooking utensil, the first resonant assembly and the second resonant assembly are synchronously driven by the control driving control circuit, so that electromagnetic field crosstalk between the first resonant assembly and the second resonant assembly is reduced when the first resonant assembly and the second resonant assembly do not synchronously drive and operate, and the reliability and the cooking efficiency of the cooking utensil are improved.
The electromagnetic field generated by the first resonant assembly is mainly used for heating the first heating plate, the electromagnetic field generated by the second resonant assembly is mainly used for heating the second heating plate, in order to further reduce electromagnetic harmonic waves of the cooking utensil, the driver circuit can synchronously drive the first resonant assembly and the second resonant assembly to work, and the first resonant assembly and the second resonant assembly are subjected to frequency reduction treatment and/or amplitude variation treatment, and it is understood that current flowing through the first resonant assembly and the second resonant assembly are the same in direction, so that electromagnetic field crosstalk between the first resonant assembly and the second resonant assembly is further reduced.
Specifically, the first resonant assembly and the second resonant assembly both operate according to the modulated pulse signal, so the down-conversion process may be to reduce the output frequency of the modulated pulse signal, and the frequency conversion process may be to reduce the width of the modulated pulse signal.
In addition, the driving control circuit of the cooking utensil provided by the technical scheme of the invention has the following additional technical characteristics:
in one embodiment, a driver circuit includes: the first driver is connected to the control end of the first resonance component, and receives a first driving instruction sent by the controller of the cooking appliance, so as to convert the first driving instruction into a first-frequency modulation pulse signal and send the first-frequency modulation pulse signal to the first resonance component; the second driver is connected to the control end of the second resonance component, receives a second driving instruction sent by the controller of the cooking appliance, converts the second driving instruction into a second-frequency modulation pulse signal, and sends the second-frequency modulation pulse signal to the second resonance component, wherein the first-frequency modulation pulse signal and the second-frequency modulation pulse signal are synchronous signals, and the first-frequency modulation pulse signal and the second-frequency modulation pulse signal are in an integer multiple relation.
In the technical scheme, the driver circuit comprises a first driver and a second driver which are arranged corresponding to the first resonant assembly and the second resonant assembly, wherein the first driver and the second driver respectively generate a first frequency modulation pulse signal and a second frequency modulation pulse signal according to a received driving instruction, and the first frequency modulation pulse signal and the second frequency modulation pulse signal are synchronous signals and are in integral multiple relation, so that variable frequency driving under the synchronous driving condition of the first resonant assembly and the second resonant assembly is realized, the electromagnetic field crosstalk between the first resonant assembly and the second resonant assembly is reduced, the heating power of the first heating plate and the second heating plate is controlled, and the reliability and the cooking efficiency of the cooking appliance are ensured.
In one embodiment, a resonant circuit includes: and the switching tube assembly is connected between the first end of the resonant circuit and the output end of the driver circuit, and the driver circuit outputs a modulation pulse signal to the switching tube assembly.
In the technical scheme, the resonant circuit further comprises a switch tube assembly, wherein the switch tube assembly is arranged between the first end of the resonant circuit and the output end of the driver circuit, and the switch tube assembly is controlled to be switched on or off, so that the resonant circuit stores electric energy and converts the electric energy into magnetic field energy, and further the first heating plate or the second heating plate is heated.
In one embodiment, a switching tube assembly includes: the output end of the first switching tube is connected to the first end of the first resonance component, and the control end of the first switching tube is connected to the output end of the first driver; the output end of the second switch tube is connected to the first end of the second resonance component, the control end of the second switch tube is connected to the output end of the second driver, the power of the first resonance component is larger than or equal to that of the second resonance component, and the voltage amplitude of the output end of the first switch tube is larger than or equal to that of the output end of the second switch tube.
In this technical scheme, the switch tube assembly includes first switch tube and second switch tube, and wherein, first switch tube and second switch tube correspond control first resonance assembly and second resonance assembly respectively, and correspondingly, when the power of first resonance assembly is greater than or equal to the power of second resonance assembly, the voltage amplitude of the output of first switch tube is greater than or equal to the voltage amplitude of the output of second switch tube, can understand that because the switching-on or the switching-off state of first switch tube or second switch tube receives its switching-on frequency control, can realize the regulation of power through setting for the switching-on state of different frequency control first switch tube or second switch tube.
One embodiment further comprises: the first input end of the comparison circuit is connected to the first end of the resonance circuit, the second input end of the comparison circuit is connected to the second end of the resonance circuit, and the output end of the comparison circuit is connected to the controller of the cooking utensil so that the controller can output corresponding driving instructions according to the comparison result of the comparison circuit.
In the technical scheme, the comparison circuit is arranged so that the comparison circuit can transmit the comparison result of the voltage value of the first end of the resonant circuit and the voltage value of the second end of the resonant circuit to the controller of the cooking appliance, so that the controller can output a corresponding driving instruction according to the comparison result of the comparison circuit.
One embodiment further comprises: the comparison circuit includes: the first input end of the first comparator is connected to the first end of the first resonant assembly, the second input end of the first comparator is connected to the second end of the first resonant assembly, the output end of the first comparator is connected to the controller of the cooking appliance so that the controller can output a first driving instruction according to the comparison result of the first comparator, the first input end of the second comparator is connected to the first end of the second resonant assembly, the second input end of the second comparator is connected to the second end of the second resonant assembly, and the output end of the second comparator is connected to the controller of the cooking appliance so that the controller can output a second driving instruction according to the comparison result of the second comparator.
In this technical scheme, the comparison circuit specifically includes a first comparator and a second comparator, and because the first driving instruction and the second driving instruction are output according to the results output by the corresponding first comparator and second comparator, respectively, it can be understood that the first driving instruction and the second driving instruction belong to different control circuits, respectively, and therefore, the reliability of the driving control circuit is improved.
One embodiment further comprises: and the switching switch is connected between the second end of the resonant circuit and the second input end of the comparison circuit and is configured to switch the voltage signal of the first end of the first resonant component into the comparison circuit or switch the voltage signal of the first end of the second resonant component into the comparison circuit.
In this technical scheme, through setting up change over switch to utilize switch circuit to select to insert the voltage signal of the first end of first resonance subassembly comparison circuit, or insert the voltage signal of the first end of second resonance subassembly comparison circuit, it can be understood that comparison circuit only needs a comparator can realize above-mentioned function, consequently, has simplified the component and the complexity of drive control circuit.
In one embodiment, the first resonant assembly comprises a first capacitive element and a first inductive element connected in series and/or parallel.
In this embodiment, the first resonant assembly converts the power supply signal into a magnetic field signal, the first capacitive element is configured to store energy, and when a current flows through the first inductive element, an electromagnetic field is generated that radiates outward, and the electromagnetic field generates an eddy current effect on the first heating plate, so that the first heating plate generates heat.
In one embodiment, the second resonant assembly comprises a second capacitive element and a second inductive element connected in series and/or parallel.
In the technical scheme, the second resonance component converts a power supply signal into a magnetic field signal, the second capacitive element is used for storing energy, when current flows through the second inductive element, an electromagnetic field which radiates outwards is generated, and the electromagnetic field generates an eddy current effect on the second heating plate so that the second heating plate heats.
One embodiment further comprises: and the output end of the choke coil is connected with the input end of the resonant circuit and is used for filtering the power supply signal input to the resonant circuit.
In the technical scheme, the choke coil is arranged at the input end of the resonant circuit, so that noise in a power supply signal can be reduced, and the reliability of the resonant circuit is further improved.
One embodiment further comprises: and the output end of the rectifier is connected with the input end of the choke coil and is used for converting an alternating current signal in the power supply signal into a direct current signal.
One embodiment further comprises: and the fuse is connected between the power grid system and the input end of the rectifier and is used for carrying out current limiting and/or voltage limiting treatment on the power supply signal input by the power grid system.
In the technical scheme, the fuse is arranged between the power grid system and the rectifier so as to perform current limiting and/or voltage limiting treatment on the power supply signal input by the power grid system, so that the ripple signal input to the drive control circuit can be effectively reduced, and the backward current of the drive control circuit to the power grid system can be reduced.
According to a second aspect of the present invention, there is provided a control method of a cooking appliance provided with a drive control circuit, a first heating plate and a second heating plate electrically connected, the drive control circuit further provided with a first resonance assembly for heating the first heating plate, and a second resonance assembly for heating the second heating plate, comprising: and synchronously driving the first resonant assembly and the second resonant assembly, and performing frequency reduction treatment and/or amplitude variation treatment on the first resonant assembly and the second resonant assembly.
In the technical scheme, the first resonant assembly and the second resonant assembly are synchronously driven by the control drive control circuit, so that electromagnetic field crosstalk between the first resonant assembly and the second resonant assembly is reduced when the first resonant assembly and the second resonant assembly are not synchronously driven to operate, and the reliability and the cooking efficiency of the cooking appliance are improved.
In one embodiment, the driving of the first resonant assembly and the second resonant assembly synchronously, and the frequency-reducing treatment and/or amplitude-changing treatment of the first resonant assembly and the second resonant assembly specifically include: generating a first driving instruction, converting the first driving instruction into a first frequency modulation pulse signal, and transmitting the first frequency modulation pulse signal to the first resonance component; generating a second driving instruction, converting the second driving instruction into a second frequency modulation pulse signal, and sending the second frequency modulation pulse signal to the second resonance component, wherein the first frequency modulation pulse signal and the second frequency modulation pulse signal are synchronous signals, and the first frequency and the second frequency are in integer multiple relation.
In the technical scheme, the modulating pulse signal of the first frequency and the modulating pulse signal of the second frequency are synchronous signals, and the first frequency and the second frequency are in integer multiple relation, so that variable frequency driving under the condition of synchronous driving of the first resonant assembly and the second resonant assembly is realized, electromagnetic field crosstalk between the first resonant assembly and the second resonant assembly is reduced, heating power of the first heating plate and the second heating plate is controlled, and reliability and cooking efficiency of the cooking appliance are ensured.
According to a third aspect of the present invention, there is provided a cooking appliance comprising: the first heating plate and the second heating plate are oppositely arranged; the drive control circuit according to any one of the above, the drive control circuit comprising: a resonant circuit, the resonant circuit comprising: the first resonant assembly is arranged on the first side of the first heating plate; the second resonance component is arranged on the first side of the second heating plate; and the switching circuit is arranged at the input end of the resonant circuit and/or at the output end of the resonant circuit and is configured to control the first resonant assembly and the second resonant assembly to alternately work.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 shows a schematic diagram of a drive control circuit according to one embodiment of the invention;
FIG. 2 shows a schematic diagram of a drive control circuit according to one embodiment of the invention;
FIG. 3 shows a schematic diagram of a drive control circuit according to one embodiment of the invention;
FIG. 4 shows a schematic diagram of drive signals for a drive control circuit according to one embodiment of the invention;
FIG. 5 shows a schematic diagram of drive signals for a drive control circuit according to one embodiment of the invention;
FIG. 6 shows a schematic diagram of drive signals for a drive control circuit according to one embodiment of the invention;
FIG. 7 shows a schematic diagram of drive signals for a drive control circuit according to one embodiment of the invention;
fig. 8 illustrates a schematic flowchart of a control method of a cooking appliance according to an embodiment of the present invention;
fig. 9 shows a schematic block diagram of a cooking appliance according to an embodiment of the present invention.
Wherein, the correspondence between the reference numerals and the component names in fig. 1 to 9 is:
the cooking appliance 100, the drive control circuit 200, the fuse F1, the rectifier D1, the choke coil L1, the first heating pad H1, the second heating pad H2, the second inductive element L2, the first inductive element L3, the first switching tube Q1, the collector voltage VC1 of the first switching tube Q1, the gate voltage VG1 of the first switching tube Q1, the second switching tube Q2, the collector voltage VC2 of the second switching tube Q2, the gate voltage VG2 of the second switching tube Q2, the first driver U1, the second driver U2, the sensor U3, the controller IC1, the first direct current source VDD1, the second direct current source VDD2, the first capacitive element C3, the second capacitive element C2, the first filter capacitor C1, the modulated pulse signal EN 1 of the first frequency, the modulated pulse signal PPG2 of the second frequency, the switch SW, the enable signal, the zero line N, the L, the reference voltage VB, the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor CMP 7, the eighth resistor CMP2, the fifth resistor CMP 7, and the eighth resistor CMP2.
Description of the embodiments
So that the manner in which the above recited aspects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized below, may be had by reference to the appended drawings. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
A cooking appliance and a driving control circuit according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 9.
In one embodiment of the present invention, as shown in fig. 1, there is provided a driving control circuit 200 of a cooking appliance 100, including: a resonant circuit, the resonant circuit comprising: the first resonance component is arranged on the first side of the first heating plate H1; the second resonance component is arranged on the first side of the second heating plate H2; and the driver circuit is connected to the control end of the resonant circuit and is configured to synchronously drive the first resonant assembly and the second resonant assembly and perform frequency reduction treatment and/or amplitude variation treatment on the first resonant assembly and the second resonant assembly, wherein the second side of the first heating plate H1 is opposite to the second side of the second heating plate H2.
According to the control scheme for controlling the cooking utensil 100, the driving control circuit 200 is controlled to synchronously drive the first resonant assembly and the second resonant assembly, so that electromagnetic field crosstalk between the first resonant assembly and the second resonant assembly is reduced when the first resonant assembly and the second resonant assembly do not synchronously drive and operate, and the reliability and the cooking efficiency of the cooking utensil 100 are improved.
The electromagnetic field generated by the first resonant assembly is mainly used for heating the first heating plate H1, the electromagnetic field generated by the second resonant assembly is mainly used for heating the second heating plate H2, in order to further reduce electromagnetic harmonics of the cooking appliance, the driver circuit can synchronously drive the first resonant assembly and the second resonant assembly to work, and perform frequency reduction treatment and/or amplitude variation treatment on the first resonant assembly and the second resonant assembly, and it can be understood that current flowing through the first resonant assembly and the second resonant assembly are the same in direction, so that electromagnetic field crosstalk between the first resonant assembly and the second resonant assembly is further reduced.
Specifically, the first resonant assembly and the second resonant assembly both operate according to the modulated pulse signal, so the down-conversion process may be to reduce the output frequency of the modulated pulse signal, and the frequency conversion process may be to reduce the width of the modulated pulse signal.
In addition, the driving control circuit 200 of the cooking appliance 100 provided in the above embodiment of the present invention further has the following additional technical features:
in one embodiment, a driver circuit includes: the first driver U1 is connected to the control end of the first resonant assembly, and the first driver U1 receives a first driving instruction sent by the controller IC1 of the cooking appliance 100 to convert the first driving instruction into a modulated pulse signal PPG1 with a first frequency and sends the modulated pulse signal PPG1 with the first frequency to the first resonant assembly; the second driver U2 is connected to the control end of the second resonant assembly, the second driver U2 receives a second driving instruction sent by the controller IC1 of the cooking appliance 100 to convert the second driving instruction into a modulated pulse signal PPG2 with a second frequency, and sends the modulated pulse signal PPG2 with the second frequency to the second resonant assembly, wherein the modulated pulse signal PPG1 with the first frequency and the modulated pulse signal PPG2 with the second frequency are synchronous signals, and the first frequency and the second frequency are in an integer multiple relationship.
In this embodiment, the driver circuit includes a first driver U1 and a second driver U2 disposed corresponding to the first resonant assembly and the second resonant assembly, where the first driver U1 and the second driver U2 generate a first frequency modulated pulse signal PPG1 and a second frequency modulated pulse signal PPG2 according to the received driving instruction, respectively, and because the first frequency modulated pulse signal PPG1 and the second frequency modulated pulse signal PPG2 are synchronous signals and the first frequency and the second frequency are in an integer multiple relationship, variable frequency driving under synchronous driving of the first resonant assembly and the second resonant assembly is achieved, control of heating power of the first heating plate H1 and the second heating plate H2 is achieved while reducing electromagnetic field crosstalk between the first resonant assembly and the second resonant assembly, and reliability and cooking efficiency of the cooking appliance 100 are ensured.
In one embodiment, a resonant circuit includes: and the switching tube assembly is connected between the first end of the resonant circuit and the output end of the driver circuit, and the driver circuit outputs a modulation pulse signal to the switching tube assembly.
In this embodiment, the resonant circuit further includes a switching tube assembly, where the switching tube assembly is disposed between the first end of the resonant circuit and the output end of the driver circuit, and by controlling the switching tube assembly to be turned on or off, the resonant circuit achieves storage of electric energy and conversion into magnetic field energy, and further achieves heating of the first heating plate H1 or the second heating plate H2.
In one embodiment, a switching tube assembly includes: the output end of the first switching tube Q1 is connected to the first end of the first resonant assembly, and the control end of the first switching tube Q1 is connected to the output end of the first driver U1; the output end of the second switch tube Q2 is connected to the first end of the second resonance component, the control end of the second switch tube Q2 is connected to the output end of the second driver U2, wherein the power of the first resonance component is larger than or equal to that of the second resonance component, and the voltage amplitude of the output end of the first switch tube Q1 is larger than or equal to that of the output end of the second switch tube Q2.
In this embodiment, the switching tube assembly includes a first switching tube Q1 and a second switching tube Q2, where the first switching tube Q1 and the second switching tube Q2 respectively control the first resonant assembly and the second resonant assembly correspondingly, when the power of the first resonant assembly is greater than or equal to that of the second resonant assembly, the voltage amplitude of the output end of the first switching tube Q1 is greater than or equal to that of the output end of the second switching tube Q2, and it can be understood that, since the on or off state of the first switching tube Q1 or the second switching tube Q2 is controlled by the frequency of the on or off state of the first switching tube Q1 or the second switching tube Q2 is controlled by setting different frequencies, so that the power adjustment can be achieved.
The collector electrode end of the first switching tube Q1 is an output end, the gate of the first switching tube Q1 is a control end, the emission collector of the first switching tube Q1 is grounded, the collector electrode end of the second switching tube Q2 is an output end, the emission collector of the second switching tube Q2 is grounded, and the gate of the second switching tube Q2 is a control end.
One embodiment further comprises: the first input end of the comparison circuit is connected to the first end of the resonance circuit, the second input end of the comparison circuit is connected to the second end of the resonance circuit, and the output end of the comparison circuit is connected to the controller IC1 of the cooking utensil 100 so that the controller IC1 can output corresponding driving instructions according to the comparison result of the comparison circuit.
In this embodiment, by providing the comparison circuit so that the comparison circuit transmits the comparison result of the voltage value of the first end of the resonance circuit and the voltage value of the second end of the resonance circuit to the controller IC1 of the cooking appliance 100 so that the controller IC1 outputs a corresponding driving instruction according to the comparison result of the comparison circuit, it can be understood that since the controller IC1 of the cooking appliance 100 receives the comparison result output by the comparison circuit, synchronous driving of the first resonance component and the second resonance component is achieved, and electromagnetic field crosstalk between the first resonance component and the second resonance component is reduced, and in addition, the first resonance component and the second resonance component can operate simultaneously, thereby ensuring reliability and cooking efficiency of the cooking appliance 100.
One embodiment, as shown in fig. 2, further includes: the comparison circuit includes: the cooking appliance comprises a first comparator CMP1, wherein a first input end of the first comparator CMP1 is connected to a first end of a first resonant assembly, a second input end of the first comparator CMP1 is connected to a second end of the first resonant assembly, an output end of the first comparator CMP1 is connected to a controller IC1 of the cooking appliance 100, the controller IC1 outputs a first driving instruction according to a comparison result of the first comparator CMP1, a second comparator CMP2, a first input end of the second comparator CMP2 is connected to a first end of the second resonant assembly, a second input end of the second comparator CMP2 is connected to a second end of the second resonant assembly, and an output end of the second comparator CMP2 is connected to the controller IC1 of the cooking appliance 100, so that the controller IC1 outputs a second driving instruction according to the comparison result of the second comparator CMP 2.
In this embodiment, the comparison circuit specifically includes the first comparator CMP1 and the second comparator CMP2, and since the first driving instruction and the second driving instruction are output according to the results output by the corresponding first comparator CMP1 and second comparator CMP2, respectively, it can be understood that the first driving instruction and the second driving instruction belong to different control circuits, respectively, and thus, the reliability of the driving control circuit 200 is improved.
The comparison circuit further comprises a first direct current source VDD1 and a second direct current source VDD2, wherein the first direct current source VDD1 is connected to the output terminal of the first comparator CMP1 through an eighth resistor R8.
The second dc source VDD2 is connected to the output terminal of the second comparator CMP2 through the first resistor R1.
In an embodiment of the present invention, the comparing circuit further includes a second resistor R2 and a third resistor R3, wherein the third resistor R3 is connected in series between the first input terminal of the second comparator CMP2 and the first terminal of the second resonant assembly, the first terminal of the second resistor R2 is connected between the third resistor R3 and the first input terminal of the second comparator CMP2, and the second terminal of the second resistor R2 is grounded; the comparison circuit further comprises a fourth resistor R4 and a fifth resistor R5, wherein the fifth resistor R5 is connected in series between the second input end of the second comparator CMP2 and the first end of the second resonant assembly, the first end of the fourth resistor R4 is connected between the fifth resistor R5 and the first input end of the second comparator CMP2, and the second end of the fourth resistor R4 is grounded.
In an embodiment of the present invention, the comparing circuit further includes a sixth resistor R6 and a seventh resistor R7, wherein the seventh resistor R7 is connected in series between the second input end of the first comparator CMP1 and the first end of the first resonant component, the first end of the sixth resistor R6 is connected between the seventh resistor R7 and the second input end of the first comparator CMP1, the second end of the sixth resistor R6 is grounded, and the first input end of the first comparator CMP1 is connected to the first end of the second resonant component and then grounded through the first filter capacitor C1.
In one embodiment, as shown in fig. 4, in general, the collector voltage VC1 of the first switching tube Q1 shown in fig. 2 is detected to obtain a VC signal, the first comparator CMP1 outputs a high level signal according to the reference voltage VB, the controller IC1 outputs a PPG1 signal, the gate voltage VG1 of the first switching tube Q1 is at the high level signal, the first switching tube Q1 is turned on, but after the PPG1 signal reaches a certain width, the output is stopped, at this time, the current is stored in the first inductive element L3, and cannot immediately become zero, and the first inductive element L3 and the first capacitive element C3 oscillate.
In this embodiment, as shown in fig. 5, during a pulse width modulation period T0, as the gate voltage VG1 of the first switching tube Q1 is at the high level signal, the collector voltage VC2 of the second switching tube Q2 is also at the high level signal, i.e. the second switching tube Q2 is turned on, it can be understood that the first heating plate H1 and the second heating plate H2 are simultaneously operated at the time positions of d1 and d 2.
In one embodiment, as shown in fig. 6, when the gate voltage VG1 of the first switching tube Q1 is in the high level signal, the collector voltage VC2 of the second switching tube Q2 is also in the high level signal, that is, the first switching tube Q1 is turned on, and the second switching tube Q2 is turned on, but the frequency of the first switching tube Q1 being turned on is an integer multiple of the frequency of the second switching tube Q2 being turned on, which can be understood as a down-conversion process for the second switching tube Q2.
In one embodiment, as shown in fig. 7, when the gate voltage VG1 of the first switching tube Q1 is in the high level signal, the collector voltage VC2 of the second switching tube Q2 is also in the high level signal, that is, the second switching tube Q2 is turned on, it is understood that the first heating plate H1 and the second heating plate H2 operate simultaneously at the time positions of d1 and d2, but the frequency of the conduction of the first switching tube Q1 is an integer multiple of the frequency of the conduction of the second switching tube Q2, which is understood as the frequency-reducing process for the second switching tube Q2.
One embodiment, as shown in fig. 3, further includes: and the switching switch SW is connected between the second end of the resonant circuit and the second input end of the comparison circuit and is configured to switch the voltage signal of the first end of the first resonant component into the comparison circuit or switch the voltage signal of the first end of the second resonant component into the comparison circuit.
In this embodiment, by providing the changeover switch SW so as to select whether the voltage signal of the first end of the first resonant assembly is connected to the comparison circuit or the voltage signal of the first end of the second resonant assembly is connected to the comparison circuit by using the switching circuit, it is understood that the comparison circuit can realize the above functions by only one comparator, and thus, the elements and complexity of the driving control circuit 200 are simplified.
The switch SW receives the enable signal EN, and switches the voltage signal of the first end of the first resonant component to the comparing circuit or switches the voltage signal of the first end of the second resonant component to the comparing circuit according to the enable signal EN.
In one embodiment, the first resonant assembly comprises a first capacitive element C3 and a first inductive element L3 connected in series and/or parallel.
In this embodiment, the first resonant assembly converts the power supply signal into the magnetic field signal, the first capacitive element C3 is used for storing energy, and when the first inductive element L3 has a current flowing, an electromagnetic field radiating outwards is generated, and the electromagnetic field generates an eddy current effect on the first heating plate H1, so that the first heating plate H1 generates heat.
In one embodiment, the second resonant assembly comprises a second capacitive element C2 and a second inductive element L2 connected in series and/or parallel.
In this embodiment, the second resonant assembly converts the power supply signal into a magnetic field signal, the second capacitive element C2 is used for storing energy, and when the second inductive element L2 has a current flowing, an electromagnetic field radiating outwards is generated, and the electromagnetic field generates an eddy current effect on the second heating plate H2, so that the second heating plate H2 generates heat.
One embodiment further comprises: and the output end of the choke coil L1 is connected with the input end of the resonant circuit and is used for filtering the power supply signal input into the resonant circuit.
In this embodiment, by providing the choke coil L1 at the input end of the resonance circuit, noise in the power supply signal can be reduced to further improve the reliability of the resonance circuit.
One embodiment further comprises: and the output end of the rectifier D1 is connected to the input end of the choke coil L1 and is used for converting an alternating current signal in the power supply signal into a direct current signal.
One embodiment further comprises: and the fuse F1 is connected between the power grid system and the input end of the rectifier D1 and is used for carrying out current limiting and/or voltage limiting processing on a power supply signal input by the power grid system.
In this embodiment, by providing the fuse F1 between the grid system and the rectifier D1 to perform current limiting and/or voltage limiting processing on the power supply signal input by the grid system, the ripple signal input to the drive control circuit 200 can be effectively reduced, and the reverse current of the drive control circuit 200 to the grid system can be reduced.
The neutral line N and the live line L of the power grid system are connected to the driving control circuit defined in the application in a mode as shown in fig. 1, 2 and 3.
Wherein the sensor U3 may detect the temperature of the first heating pan H1 or the second heating pan H2 and control the temperature of the first heating pan H1 or the second heating pan H2 through the controller IC 1.
As shown in fig. 8, a control method of a cooking appliance according to another embodiment of the present invention is provided with a driving control circuit, a first heating plate and a second heating plate electrically connected, the driving control circuit further provided with a first resonance assembly for heating the first heating plate and a second resonance assembly for heating the second heating plate, comprising:
step S802, driving the first resonant assembly and the second resonant assembly synchronously, and performing frequency-reducing treatment and/or amplitude-changing treatment on the first resonant assembly and the second resonant assembly.
In the technical scheme, the first resonant assembly and the second resonant assembly are synchronously driven by the control drive control circuit, so that electromagnetic field crosstalk between the first resonant assembly and the second resonant assembly is reduced when the first resonant assembly and the second resonant assembly are not synchronously driven to operate, and the reliability and the cooking efficiency of the cooking appliance are improved.
In one embodiment, the driving of the first resonant assembly and the second resonant assembly synchronously, and the frequency-reducing treatment and/or amplitude-changing treatment of the first resonant assembly and the second resonant assembly specifically include: generating a first driving instruction, converting the first driving instruction into a first frequency modulation pulse signal, and transmitting the first frequency modulation pulse signal to the first resonance component; generating a second driving instruction, converting the second driving instruction into a second frequency modulation pulse signal, and sending the second frequency modulation pulse signal to the second resonance component, wherein the first frequency modulation pulse signal and the second frequency modulation pulse signal are synchronous signals, and the first frequency and the second frequency are in integer multiple relation.
In the technical scheme, the modulating pulse signal of the first frequency and the modulating pulse signal of the second frequency are synchronous signals, and the first frequency and the second frequency are in integer multiple relation, so that variable frequency driving under the condition of synchronous driving of the first resonant assembly and the second resonant assembly is realized, electromagnetic field crosstalk between the first resonant assembly and the second resonant assembly is reduced, heating power of the first heating plate and the second heating plate is controlled, and reliability and cooking efficiency of the cooking appliance are ensured.
As shown in fig. 9, the present invention provides a cooking appliance 100 including: a first heating plate H1 and a second heating plate H2 which are oppositely arranged; the drive control circuit 200 according to any one of the above, the drive control circuit 200 comprising: a resonant circuit, the resonant circuit comprising: the first resonance component is arranged on the first side of the first heating plate H1; the second resonance component is arranged on the first side of the second heating plate H2; and the switching circuit is arranged at the input end of the resonant circuit and/or at the output end of the resonant circuit and is configured to control the first resonant assembly and the second resonant assembly to alternately work.
In the description of the present invention, the term "plurality" means two or more, unless explicitly defined otherwise, the orientation or positional relationship indicated by the terms "upper", "lower", etc. are based on the orientation or positional relationship shown in the drawings, merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention; the terms "coupled," "mounted," "secured," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A drive control circuit of a cooking appliance provided with a first heating plate and a second heating plate, characterized in that the drive control circuit comprises:
a resonant circuit, the resonant circuit comprising:
the first resonant assembly is arranged on the first side of the first heating plate;
The second resonance component is arranged on the first side of the second heating plate;
a driver circuit connected to a control terminal of the resonant circuit, the driver circuit configured to drive the first and second resonant assemblies synchronously, and to perform a down-conversion and/or luffing process on the first and second resonant assemblies,
wherein the second side of the first heating plate is disposed opposite the second side of the second heating plate;
the driver circuit includes:
the first driver is connected to the control end of the first resonance component, and receives a first driving instruction sent by the controller of the cooking appliance, so as to convert the first driving instruction into a first-frequency modulation pulse signal and send the first-frequency modulation pulse signal to the first resonance component;
a second driver connected to the control end of the second resonance assembly, the second driver receiving a second driving command sent from the controller of the cooking appliance to convert the second driving command into a second frequency modulation pulse signal and send the second frequency modulation pulse signal to the second resonance assembly,
The first frequency modulation pulse signal and the second frequency modulation pulse signal are synchronous signals, and the first frequency and the second frequency are in integer multiple relation;
the resonant circuit includes:
the switch tube assembly is connected between the first end of the resonant circuit and the output end of the driver circuit, and the driver circuit outputs the modulation pulse signal to the switch tube assembly;
the switch tube assembly includes:
the output end of the first switching tube is connected to the first end of the first resonant assembly, and the control end of the first switching tube is connected to the output end of the first driver;
a second switching tube, the output end of the second switching tube is connected to the first end of the second resonance component, the control end of the second switching tube is connected to the output end of the second driver,
the power of the first resonance component is larger than or equal to that of the second resonance component, and the voltage amplitude of the output end of the first switching tube is larger than or equal to that of the output end of the second switching tube;
the driving control circuit of the cooking appliance further includes:
A comparison circuit, a first input of which is connected to a first end of the resonant circuit, and a second input of which is connected to a second end of the resonant circuit;
and the change-over switch is connected between the second end of the resonance circuit and the second input end of the comparison circuit, and is configured to connect the voltage signal of the first end of the first resonance component to the comparison circuit or connect the voltage signal of the first end of the second resonance component to the comparison circuit.
2. The drive control circuit according to claim 1, wherein,
the output end of the comparison circuit is connected to the controller of the cooking utensil so that the controller can output a corresponding driving instruction according to the comparison result of the comparison circuit.
3. The drive control circuit according to claim 2, wherein the comparison circuit includes:
a first comparator, a first input end of the first comparator is connected to a first end of the first resonant assembly, a second input end of the first comparator is connected to a second end of the first resonant assembly, an output end of the first comparator is connected to a controller of the cooking appliance for the controller to output the first driving instruction according to a comparison result of the first comparator,
The first input end of the second comparator is connected to the first end of the second resonance component, the second input end of the second comparator is connected to the second end of the second resonance component, and the output end of the second comparator is connected to the controller of the cooking utensil so that the controller can output the second driving instruction according to the comparison result of the second comparator.
4. A drive control circuit according to any one of claim 1 to 3, wherein,
the first resonant assembly comprises a first capacitive element and a first inductive element connected in series and/or parallel;
the second resonant assembly comprises a second capacitive element and a second inductive element connected in series and/or parallel.
5. A drive control circuit according to any one of claims 1 to 3, further comprising:
and the output end of the choke coil is connected with the input end of the resonant circuit and is used for filtering the power supply signal input to the resonant circuit.
6. A control method of a cooking appliance, wherein the cooking appliance is provided with a drive control circuit, a first heating plate and a second heating plate which are electrically connected, the drive control circuit is further provided with a first resonance component for heating the first heating plate, and a second resonance component for heating the second heating plate, comprising:
Synchronously driving the first and second resonant assemblies, an
Performing frequency-reducing treatment and/or amplitude-changing treatment on the first resonance component and the second resonance component;
the method for synchronously driving the first resonance component and the second resonance component and carrying out frequency reduction treatment and/or amplitude variation treatment on the first resonance component and the second resonance component specifically comprises the following steps:
generating a first driving instruction, converting the first driving instruction into a first frequency modulation pulse signal, and transmitting the first frequency modulation pulse signal to the first resonance component;
generating a second driving instruction and converting the second driving instruction into a modulated pulse signal with a second frequency, and transmitting the modulated pulse signal with the second frequency to the second resonance component,
the first frequency modulation pulse signal and the second frequency modulation pulse signal are synchronous signals, and the first frequency and the second frequency are in integer multiple relation.
7. A cooking appliance, comprising:
the first heating plate and the second heating plate are oppositely arranged;
the drive control circuit according to any one of claims 1 to 5, comprising:
A resonant circuit, the resonant circuit comprising:
the first resonant assembly is arranged on the first side of the first heating plate;
the second resonance component is arranged on the first side of the second heating plate;
and the switching circuit is arranged at the input end of the resonant circuit and/or at the output end of the resonant circuit and is configured to control the first resonant assembly and the second resonant assembly to alternately work.
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| CN201911420849.3A CN113133145B (en) | 2019-12-31 | 2019-12-31 | Cooking appliance, drive control circuit and control method |
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| CN201911420849.3A CN113133145B (en) | 2019-12-31 | 2019-12-31 | Cooking appliance, drive control circuit and control method |
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| CN102813466A (en) * | 2012-08-28 | 2012-12-12 | 淮南联合大学 | Electromagnetic heating safe energy-saving electric baking pan |
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| CN105987410A (en) * | 2015-03-04 | 2016-10-05 | 佛山市顺德区美的电热电器制造有限公司 | Electric cooker and heating control device of electric cooker |
| KR101987919B1 (en) * | 2018-10-23 | 2019-06-12 | 코박스 주식회사 | Induction range of upper and lower heating type and driving method thereof |
| CN110338630A (en) * | 2018-04-03 | 2019-10-18 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating cooking utensil and its heating control circuit and control method |
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2019
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| CN102813466A (en) * | 2012-08-28 | 2012-12-12 | 淮南联合大学 | Electromagnetic heating safe energy-saving electric baking pan |
| CN105698230A (en) * | 2014-11-28 | 2016-06-22 | 佛山市顺德区美的电热电器制造有限公司 | Electric cooker and control circuit thereof |
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