CN113133145A - Cooking appliance, drive control circuit and control method - Google Patents
Cooking appliance, drive control circuit and control method Download PDFInfo
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- CN113133145A CN113133145A CN201911420849.3A CN201911420849A CN113133145A CN 113133145 A CN113133145 A CN 113133145A CN 201911420849 A CN201911420849 A CN 201911420849A CN 113133145 A CN113133145 A CN 113133145A
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- 238000010411 cooking Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 107
- 230000009467 reduction Effects 0.000 claims abstract description 11
- 238000012545 processing Methods 0.000 claims description 18
- 230000001360 synchronised effect Effects 0.000 claims description 16
- 230000001939 inductive effect Effects 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 230000005672 electromagnetic field Effects 0.000 abstract description 19
- 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
- 101100464779 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) CNA1 gene Proteins 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 101100464782 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) CMP2 gene Proteins 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
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- 102100036285 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Human genes 0.000 description 2
- 101000875403 Homo sapiens 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Proteins 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
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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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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 resonance 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 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, and the first resonant assembly and the second resonant assembly are synchronously driven by the control drive 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 cooking efficiency of the cooking appliance.
Description
Technical Field
The invention relates to the technical field of drive control, in particular to a cooking appliance and a drive control circuit.
Background
The electric baking pan is a tool for cooking food, can realize heating of a single heating plate or simultaneous heating of an upper heating plate and a lower heating plate, so that the food between the two heating plates is heated at high temperature.
In order to realize the heating uniformity, a vertical double-side heating mode is adopted, a heating plate heating mode is adopted in a conventional electric baking pan, and heating is carried out through a resistance wire arranged on the heating plate.
In the related art, in order to increase the heating speed, research and development personnel provide an electric baking pan based on an electromagnetic heating principle, and the upper heating plate and the lower heating plate are rapidly heated through electromagnetic heating so as to achieve the purpose of rapid baking.
However, the upper heating plate and the lower heating plate are both electromagnetically heated, so 2 coil plates are needed, and the upper heating plate and the lower heating plate are simultaneously heated, so that high-speed alternating electromagnetic fields of the upper heating plate and the lower heating plate are overlapped to a certain extent, and due to mutual inductance of coil magnetic fields, even electromagnetic heating signals are disordered, and even a driving control circuit is damaged.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, a first aspect of the present invention is to provide a driving control circuit of a cooking appliance.
In a second aspect of the present invention, a method for controlling a cooking appliance is provided.
A third aspect of the present invention is to provide a cooking appliance.
In view of the above, according to a first aspect of the present invention, there is provided a driving control circuit of a cooking appliance, comprising: a resonant circuit, the resonant circuit comprising: the first resonance 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 reduction 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 resonance assembly and the second resonance assembly are synchronously driven through the control drive control circuit, so that electromagnetic field crosstalk between the first resonance assembly and the second resonance assembly when the first resonance assembly and the second resonance assembly are asynchronously driven is reduced, and further the reliability and cooking efficiency of the cooking utensil are improved.
In order to further reduce electromagnetic harmonics of the cooking appliance, the driver circuit can synchronously drive the first resonance component and the second resonance component to work and carry out frequency reduction processing and/or amplitude variation processing on the first resonance component and the second resonance component, and it can be understood that the directions of currents flowing through the first resonance component and the second resonance component are the same so as to further reduce electromagnetic field crosstalk between the first resonance component and the second resonance component.
Specifically, the first resonance component and the second resonance component both operate according to the modulated pulse signal, and therefore, 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 appliance provided by the technical scheme of the invention also 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 assembly, receives a first driving instruction sent by a controller of the cooking appliance, converts the first driving instruction into a modulated pulse signal of a first frequency, and sends the modulated pulse signal of the first frequency to the first resonance assembly; and the second driver is connected to the control end of the second resonance assembly, receives a second driving instruction sent by the controller of the cooking appliance, converts the second driving instruction into a modulated pulse signal of a second frequency, and sends the modulated pulse signal of the second frequency to the second resonance assembly, wherein the modulated pulse signal of the first frequency and the modulated pulse signal of the second frequency are synchronous signals, and the first frequency and the second frequency are in integral multiple relation.
In the technical scheme, the driver circuit comprises a first driver and a second driver which are arranged corresponding to the first resonance component and the second resonance component, wherein the first driver and the second driver respectively generate a modulation pulse signal with a first frequency and a modulation pulse signal with a second frequency according to a received driving instruction, and the modulation pulse signal with the first frequency and the modulation pulse signal with the second frequency are synchronous signals and are in integral multiple relation with each other, so that variable frequency driving under the condition of synchronous driving of the first resonance component and the second resonance component is realized, electromagnetic field crosstalk between the first resonance component and the second resonance component is reduced, meanwhile, 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, the 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 the modulation pulse signal to the switching tube assembly.
In this technical scheme, resonant circuit still includes the switch tube subassembly, and wherein, the switch tube subassembly sets up between resonant circuit's first end and driver circuit's output, switches on or ends through control switch tube subassembly, and resonant circuit realizes the storage of electric energy and changes into magnetic field energy, and then realizes the heating to first heating plate or second heating plate.
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 resonant circuit, and the control end of the first switching tube is connected to the output end of the first driver; and the output end of the second switching tube is connected to the first end of the second resonant circuit, the control end of the second switching tube is connected to the output end of the second driver, wherein the power of the first resonant circuit is greater than or equal to that of the second resonant circuit, and the voltage amplitude of the output end of the first switching tube is greater than or equal to that of the output end of the second switching tube.
In this technical scheme, the switching tube assembly includes a first switching tube and a second switching tube, wherein the first switching tube and the second switching tube respectively control the first resonant circuit and the second resonant circuit correspondingly, and correspondingly, when the power of the first resonant circuit is greater than or equal to the power of the second resonant circuit, the voltage amplitude of the output end of the first switching tube is greater than or equal to the voltage amplitude of the output end of the second switching tube.
One embodiment further comprises: and 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 appliance, so that the controller outputs a corresponding driving instruction according to the comparison result of the comparison circuit.
In the technical scheme, the comparison circuit is arranged, so that the comparison result of the comparison circuit according to the voltage value of the first end of the resonance circuit and the voltage value of the second end of the resonance circuit is transmitted to the controller of the cooking appliance, and the controller outputs 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 comparison circuit is connected to the first end of the first resonance component, the second input end of the first comparison circuit is connected to the second end of the first resonance circuit, the output end of the first comparison circuit 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 comparison circuit, the first input end of the second comparison circuit is connected to the first end of the second resonance component, the second input end of the second comparison circuit is connected to the second end of the second resonance circuit, and the output end of the second comparison circuit 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 comparison circuit.
In the technical scheme, the comparison circuit specifically comprises a first comparator and a second comparator, and the first driving instruction and the second driving instruction are output according to the output results of the corresponding first comparator and the second comparator respectively.
One embodiment further comprises: and the change-over 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 the technical scheme, the change-over switch is arranged, so that the voltage signal of the first end of the first resonance component is selectively connected to the comparison circuit by using the switch circuit, or the voltage signal of the first end of the second resonance component is selectively connected to the comparison circuit, and it can be understood that the comparison circuit can realize the functions by only one comparator, so that the elements and the complexity of the driving control circuit are simplified.
In one embodiment, the first resonant assembly comprises a first capacitive element and a first inductive element connected in series and/or in parallel.
In this embodiment, the first resonant component converts the power supply signal into a magnetic field signal, the first capacitive element is used for storing energy, the first inductive element generates an electromagnetic field radiating outwards when current flows through the first inductive element, and the electromagnetic field generates an eddy current effect on the first heating plate so as to heat the first heating plate.
In one embodiment, the second resonant assembly comprises a second capacitive element and a second inductive element connected in series and/or in parallel.
In the technical scheme, the second resonance component converts the power supply signal into a magnetic field signal, the second capacitive element is used for storing energy, the second inductive element generates an electromagnetic field radiating outwards when current flows, and the electromagnetic field generates an eddy current effect on the second heating plate so that the second heating plate generates heat.
One embodiment further comprises: and the output end of the choke coil is connected to the input end of the resonant circuit and used for filtering the power supply signal input to the resonant circuit.
In this embodiment, by providing the choke coil at the input end of the resonant circuit, the noise in the power supply signal can be reduced, thereby further improving the reliability of the resonant circuit.
One embodiment further comprises: and the output end of the rectifier is connected with the input end of the choke coil and 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 processing on a 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 to perform current limiting and/or voltage limiting processing on the power supply signal input by the power grid system, so that ripple signals input to the drive control circuit can be effectively reduced, and the backward flow 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 which are electrically connected, the drive control circuit being 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: the first resonance assembly and the second resonance assembly are synchronously driven, and the first resonance assembly and the second resonance assembly are subjected to frequency reduction treatment and/or amplitude variation treatment.
In the technical scheme, the first resonance assembly and the second resonance assembly are driven synchronously by controlling the driving control circuit so as to reduce electromagnetic field crosstalk between the first resonance assembly and the second resonance assembly when the first resonance assembly and the second resonance assembly are driven asynchronously, and further improve the reliability and cooking efficiency of the cooking appliance.
In one embodiment, the synchronously driving the first resonance component and the second resonance component, and performing frequency reduction processing and/or amplitude variation processing on the first resonance component and the second resonance component specifically include: generating a first driving instruction, converting the first driving instruction into a modulated pulse signal with a first frequency, and sending the modulated pulse signal with the first frequency to the first resonance component; and generating a second driving instruction, converting the second driving instruction into a modulation pulse signal with a second frequency, and sending the modulation pulse signal with the second frequency to the second resonance component, wherein the modulation pulse signal with the first frequency and the modulation pulse signal with the second frequency are synchronous signals, and the first frequency and the second frequency are in integral multiple relation.
In the technical scheme, the modulation pulse signal of the first frequency and the modulation pulse signal of the second frequency are synchronous signals, and the first frequency and the second frequency are in integral multiple relation, so that variable frequency driving under the condition of synchronous driving of the first resonance component and the second resonance component is realized, electromagnetic field crosstalk between the first resonance component and the second resonance component is reduced, meanwhile, the control of the heating power of the first heating plate and the second heating plate is realized, and the reliability and the 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 resonance 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 work alternately.
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 above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows a schematic diagram of a drive control circuit according to an embodiment of the invention;
FIG. 2 shows a schematic diagram of a drive control circuit according to an embodiment of the invention;
FIG. 3 shows a schematic diagram of a drive control circuit according to an embodiment of the invention;
FIG. 4 shows a drive signal schematic of a drive control circuit according to one embodiment of the invention;
FIG. 5 shows a drive signal schematic of a drive control circuit according to one embodiment of the invention;
FIG. 6 shows a drive signal schematic of a drive control circuit according to one embodiment of the invention;
FIG. 7 shows a drive signal schematic of a drive control circuit according to one embodiment of the invention;
fig. 8 shows a schematic flow chart 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 numbers and the part names in fig. 1 to 9 is:
cooking appliance 100, drive control circuit 200, fuse F1, rectifier D1, choke coil L1, first heating plate H1, second heating plate H2, second inductive element L2, first inductive element L3, first switching tube Q3, collector voltage VC 3 of first switching tube Q3, gate voltage VG 3 of first switching tube Q3, second switching tube Q3, collector voltage VC 3 of second switching tube Q3, gate voltage VG 3 of second switching tube Q3, first driver U3, second driver U3, sensor U3, controller IC 3, first dc source VDD 3, second dc source 3, first capacitive element C3, second capacitive element C3, first capacitor C3, modulated pulse signal 3 of first frequency, modulated pulse signal 3 of second frequency, pulse signal switching signal SW 72, switch SW 72, third capacitive element C3, PPG 3, reference resistor R3, third resistor R3, PPG reference resistor R3, third resistor R3, and resistor R3, A fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first comparator CMP1 and a second comparator CMP 2.
Detailed Description
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 above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
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 specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
A cooking appliance and a driving control circuit according to an embodiment of the present invention will be specifically described 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 resonant assembly is arranged on the first side of the first heating plate H1; the second resonant assembly 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 processing and/or amplitude variation processing 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 appliance 100, the driving control circuit 200 is controlled to synchronously drive the first resonance component and the second resonance component, so that electromagnetic field crosstalk between the first resonance component and the second resonance component when the first resonance component and the second resonance component are driven asynchronously is reduced, and the reliability and the cooking efficiency of the cooking appliance 100 are improved.
In order to further reduce electromagnetic harmonics of the cooking appliance, the driver circuit can synchronously drive the first resonance component and the second resonance component to work and carry out frequency reduction processing and/or amplitude variation processing on the first resonance component and the second resonance component, and it can be understood that the directions of currents flowing through the first resonance component and the second resonance component are the same so as to further reduce electromagnetic field crosstalk between the first resonance component and the second resonance component.
Specifically, the first resonance component and the second resonance component both operate according to the modulated pulse signal, and therefore, 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 according to the above embodiment of the present invention further has the following additional technical features:
in one embodiment, a driver circuit includes: a first driver U1 connected to a control terminal of the first resonant assembly, the first driver U1 receiving a first driving command from a controller IC1 of the cooking appliance 100 to convert the first driving command into a modulated pulse signal PPG1 at a first frequency, and transmitting the modulated pulse signal PPG1 at the first frequency to the first resonant assembly; and a second driver U2 connected to the control end of the second resonant assembly, wherein the second driver U2 receives a second driving command from the controller IC1 of the cooking appliance 100, converts the second driving command into a modulated pulse signal PPG2 at a second frequency, and transmits the modulated pulse signal PPG2 at the second frequency to the second resonant assembly, the modulated pulse signal PPG1 at the first frequency and the modulated pulse signal PPG2 at the second frequency are synchronous signals, and the first frequency and the second frequency are in integer multiple.
In this embodiment, the driver circuit includes a first driver U1 and a second driver U2 disposed in correspondence with the first resonant assembly and the second resonant assembly, wherein the first driver U1 and the second driver U2 respectively generate a first frequency modulation pulse signal PPG1 and a second frequency modulation pulse signal PPG2 according to the received driving command, since the first frequency PPG1 and the second frequency PPG2 are synchronous signals, and the first frequency and the second frequency are integer multiples, therefore, the variable-frequency driving under the condition of synchronous driving of the first resonant assembly and the second resonant assembly is realized, while electromagnetic field crosstalk between the first and second resonant assemblies is reduced, control of heating powers of the first and second heating plates H1 and H2 is achieved, ensuring reliability and cooking efficiency of the cooking appliance 100.
In one embodiment, the 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 the modulation pulse signal to the switching tube assembly.
In this embodiment, the resonant circuit further comprises a switching tube assembly, wherein the switching tube assembly is disposed between the first end of the resonant circuit and the output of the driver circuit, and by controlling the switching tube assembly to be turned on or off, the resonant circuit achieves storage and conversion of electrical energy into magnetic field energy, thereby achieving heating of the first heating disk H1 or the second heating disk H2.
In one embodiment, a switching tube assembly includes: a first switch tube Q1, an output terminal of the first switch tube Q1 is connected to a first terminal of the first resonant circuit, and a control terminal of the first switch tube Q1 is connected to an output terminal of the first driver U1; and an output end of the second switching tube Q2, an output end of the second switching tube Q2 is connected to a first end of the second resonant circuit, and a control end of the second switching tube Q2 is connected to an output end of the second driver U2, wherein the power of the first resonant circuit is greater than or equal to that of the second resonant circuit, and 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.
In this embodiment, the switching tube assembly includes a first switching tube Q1 and a second switching tube Q2, wherein the first switching tube Q1 and the second switching tube Q2 respectively control the first resonant circuit and the second resonant circuit, correspondingly, when the power of the first resonant circuit is greater than or equal to the power of the second resonant circuit, the voltage amplitude of the output end of the first switching tube Q1 is greater than or equal to the voltage amplitude of the output end of the second switching tube Q2, 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 on frequency thereof, the power adjustment can be realized by setting different frequencies to control the on state of the first switching tube Q1 or the second switching tube Q2.
The collector terminal of the first switch tube Q1 is an output terminal, the gate terminal of the first switch tube Q1 is a control terminal, the emission set of the first switch tube Q1 is grounded, the collector terminal of the second switch tube Q2 is an output terminal, the emission set of the second switch tube Q2 is grounded, and the gate terminal of the second switch tube Q2 is a control terminal.
One embodiment further comprises: and a first input end of the comparison circuit is connected to the first end of the resonance circuit, a second input end of the comparison circuit is connected to the second end of the resonance circuit, and an output end of the comparison circuit is connected to the controller IC1 of the cooking appliance 100, so that the controller IC1 outputs a corresponding driving instruction according to a comparison result of the comparison circuit.
In this embodiment, by providing the comparison circuit such that the comparison circuit is transmitted to the controller IC1 of the cooking appliance 100 according to the comparison result between the voltage value of the first end of the resonance circuit and the voltage value of the second end of the resonance circuit, so that the controller IC1 outputs a corresponding driving command according to the comparison result of the comparison circuit, it can be understood that the synchronous driving of the first resonance assembly and the second resonance assembly is realized only when the controller IC1 of the cooking appliance 100 receives the comparison result output by the comparison circuit, thereby reducing the electromagnetic field crosstalk between the first resonance assembly and the second resonance assembly, and in addition, the first resonance assembly and the second resonance assembly can operate simultaneously, thereby ensuring the reliability and cooking efficiency of the cooking appliance 100.
One embodiment, as shown in fig. 2, further includes: the comparison circuit includes: a first comparator CMP1, a first input terminal of the first comparison circuit is connected to the first terminal of the first resonant assembly, a second input terminal of the first comparison circuit is connected to the second terminal of the first resonant assembly, an output terminal of the first comparison circuit is connected to the controller IC1 of the cooking appliance 100, so that the controller IC1 outputs a first driving command according to the comparison result of the first comparison circuit, a second comparator CMP2, a first input terminal of the second comparison circuit is connected to the first terminal of the second resonant assembly, a second input terminal of the second comparison circuit is connected to the second terminal of the second resonant assembly, and an output terminal of the second comparison circuit is connected to the controller IC1 of the cooking appliance 100, so that the controller IC1 outputs a second driving command according to the comparison result of the second comparison circuit.
In this embodiment, the comparison circuit specifically includes the first comparator CMP1 and the second comparator CMP2, and since the first driving command and the second driving command are output according to the output results of the corresponding first comparator CMP1 and second comparator CMP2, respectively, it can be understood that the first driving command and the second driving command are respectively subordinate to different control circuits, and therefore, the reliability of the driving control circuit 200 is improved.
The comparator circuit further includes a first dc source VDD1 and a second dc source VDD2, wherein the first dc 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 one embodiment, the comparison 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 comparison circuit and the first terminal of the second resonant component, the first terminal of the second resistor R2 is connected between the third resistor R3 and the first input terminal of the second comparison circuit, 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 terminal of the second comparison circuit and the first terminal of the second resonant component, the first terminal of the fourth resistor R4 is connected between the fifth resistor R5 and the first input terminal of the second comparison circuit, and the second terminal of the fourth resistor R4 is grounded.
In an embodiment of the present invention, the comparison 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 terminal of the first comparator and the first terminal of the first resonant element, the first terminal of the sixth resistor R6 is connected between the seventh resistor R7 and the second input terminal of the first comparison circuit, the second terminal of the sixth resistor R6 is grounded, and the first input terminal of the first comparator is connected to the first terminal of the second resonant element and then grounded through the first filter capacitor C1.
In one embodiment, as shown in fig. 4, in a normal condition, the collector voltage VC1 of the first switch 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, at this time, the controller IC1 outputs a PPG1 signal, at this time, the gate voltage VG1 of the first switch Q1 is at the high level signal, at this time, the first switch Q1 is turned on, but the PPG1 signal reaches a certain width and stops outputting, at this time, there is a current 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, with gate voltage VG1 of first switch Q1 being at a high level, collector voltage VC2 of second switch Q2 is also at a high level, i.e., second switch Q2 is turned on, it is understood that at time positions d1 and d2, first heating disk H1 and second heating disk H2 are simultaneously operated.
In one embodiment, as shown in fig. 6, when the gate voltage VG1 of the first switch Q1 is at a high level, the collector voltage VC2 of the second switch Q2 is also at a high level, i.e., the first switch Q1 is turned on, and the second switch Q2 is turned on, but the frequency at which the first switch Q1 is turned on is an integer multiple of the frequency at which the second switch Q2 is turned on, which can be understood as a down-conversion process for the second switch Q2.
In one embodiment, as shown in FIG. 7, when the gate voltage VG1 of the first switch Q1 is at a high level, the collector voltage VC2 of the second switch Q2 is also at a high level, i.e., the second switch Q2 is turned on, it is understood that at time positions d1 and d2, the first heating plate H1 and the second heating plate H2 are simultaneously operated, but the frequency at which the first switch Q1 is turned on is an integer multiple of the frequency at which the second switch Q2 is turned on, which is understood as the down-conversion 2 process for the second switch Q1.
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 selectively switch the voltage signal of the first terminal of the first resonant component into the comparison circuit or the voltage signal of the first terminal of the second resonant component into the comparison circuit by using the switch circuit, it can be understood that the comparison circuit requires only one comparator to achieve the above-described functions, and thus, the elements and complexity of the drive control circuit 200 are simplified.
The switch SW receives an enable signal EN and enables a voltage signal of the first end of the first resonance component to be connected into the comparison circuit or enables a voltage signal of the first end of the second resonance component to be connected into the comparison circuit according to the enable signal EN.
In one embodiment, the first resonant assembly includes a first capacitive element C3 and a first inductive element L3 connected in series and/or in parallel.
In this embodiment, the first resonant assembly converts the power supply signal into a magnetic field signal, the first capacitive element C3 is used for storing energy, and when current flows through the first inductive element L3, an electromagnetic field is generated that radiates outwards and generates an eddy current effect on the first heating disk H1 to heat the first heating disk H1.
In one embodiment, the second resonant assembly comprises a second capacitive element C2 and a second inductive element L2 connected in series and/or in 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 current is passed through the second inductive element L2, an outwardly radiating electromagnetic field is generated, which generates an eddy current effect on the second heating disk H2 to heat the second heating disk H2.
One embodiment further comprises: the output end of the choke coil L1 is connected to the input end of the resonant circuit, and the choke coil L1 is used for filtering the power supply signal input to the resonant circuit.
In this embodiment, by providing the choke coil L1 at the input end of the resonance circuit, the noise in the power supply signal can be reduced to further improve the reliability of the resonance circuit.
One embodiment further comprises: the output end of the rectifier D1 and the output end of the rectifier D1 are connected to the input end of the choke coil L1, and are 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 and the fuse F1 are connected between the power grid system and the input end of the rectifier D1 and are 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 disposing 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 backward current of the grid system by the drive control circuit 200 can be reduced.
The zero line N and the live line L of the power grid system are connected to the drive control circuit defined in the present application in the manner shown in fig. 1, 2 and 3.
Among them, the sensor U3 can detect with detecting the temperature of the first heating tray H1 or the second heating tray H2, and control the temperature of the first heating tray H1 or the second heating tray 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, the cooking appliance being provided with a drive control circuit, a first heating plate and a second heating plate which are electrically connected, the drive control circuit being further provided with a first resonance component for heating the first heating plate, and a second resonance component for heating the second heating plate, includes:
step S802, synchronously driving the first resonance component and the second resonance component, and performing frequency reduction processing and/or amplitude variation processing on the first resonance component and the second resonance component.
In the technical scheme, the first resonance assembly and the second resonance assembly are driven synchronously by controlling the driving control circuit so as to reduce electromagnetic field crosstalk between the first resonance assembly and the second resonance assembly when the first resonance assembly and the second resonance assembly are driven asynchronously, and further improve the reliability and cooking efficiency of the cooking appliance.
In one embodiment, the synchronously driving the first resonance component and the second resonance component, and performing frequency reduction processing and/or amplitude variation processing on the first resonance component and the second resonance component specifically include: generating a first driving instruction, converting the first driving instruction into a modulated pulse signal with a first frequency, and sending the modulated pulse signal with the first frequency to the first resonance component; and generating a second driving instruction, converting the second driving instruction into a modulation pulse signal with a second frequency, and sending the modulation pulse signal with the second frequency to the second resonance component, wherein the modulation pulse signal with the first frequency and the modulation pulse signal with the second frequency are synchronous signals, and the first frequency and the second frequency are in integral multiple relation.
In the technical scheme, the modulation pulse signal of the first frequency and the modulation pulse signal of the second frequency are synchronous signals, and the first frequency and the second frequency are in integral multiple relation, so that variable frequency driving under the condition of synchronous driving of the first resonance component and the second resonance component is realized, electromagnetic field crosstalk between the first resonance component and the second resonance component is reduced, meanwhile, the control of the heating power of the first heating plate and the second heating plate is realized, and the reliability and the cooking efficiency of the cooking appliance are ensured.
As shown in fig. 9, the present invention provides a cooking appliance 100 including: the first heating disc H1 and the second heating disc H2 are oppositely arranged; as the drive control circuit 200 of any one of the above, the drive control circuit 200 includes: a resonant circuit, the resonant circuit comprising: the first resonant assembly is arranged on the first side of the first heating plate H1; the second resonant assembly 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 work alternately.
In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means 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 terms used above 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, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A drive control circuit of a cooking appliance, the cooking appliance being 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 resonance 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 end of the resonant circuit, the driver circuit configured to synchronously drive the first and second resonant assemblies and to down-convert and/or up-convert the amplitude of the first and second resonant assemblies,
wherein the second side of the first heating plate is arranged opposite to the second side of the second heating plate.
2. The drive control circuit according to claim 1, wherein the driver circuit comprises:
the first driver is connected to the control end of the first resonant assembly, receives a first driving instruction sent by a controller of the cooking appliance, converts the first driving instruction into a modulated pulse signal of a first frequency, and sends the modulated pulse signal of the first frequency to the first resonant assembly;
a second driver connected to a control terminal of the second resonance assembly, the second driver receiving a second driving command from a controller of the cooking appliance to convert the second driving command into a modulated pulse signal of a second frequency and transmitting the modulated pulse signal of the second frequency to the second resonance assembly,
the modulation pulse signal of the first frequency and the modulation pulse signal of the second frequency are synchronous signals, and the first frequency and the second frequency are in integral multiple relation.
3. The drive control circuit according to claim 2, wherein the resonance circuit comprises:
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 the modulation pulse signal to the switching tube assembly.
4. The drive control circuit of claim 3, wherein the switching tube assembly comprises:
the output end of the first switching tube is connected to the first end of the first resonant circuit, and the control end of the first switching tube is connected to the output end of the first driver;
a second switch tube, an output end of the second switch tube is connected to the first end of the second resonant circuit, a control end of the second switch tube is connected to the output end of the second driver,
the power of the first resonant circuit is greater than or equal to the power of the second resonant circuit, and the voltage amplitude of the output end of the first switching tube is greater than or equal to the voltage amplitude of the output end of the second switching tube.
5. The drive control circuit according to claim 3, characterized by further comprising:
and a first input end of the comparison circuit is connected to a first end of the resonance circuit, a second input end of the comparison circuit is connected to a second end of the resonance circuit, and an output end of the comparison circuit is connected to a controller of the cooking appliance, so that the controller outputs a corresponding driving instruction according to a comparison result of the comparison circuit.
6. The drive control circuit according to claim 5, wherein the comparison circuit comprises:
a first comparator, a first input terminal of the first comparison circuit is connected to the first end of the first resonant component, a second input terminal of the first comparison circuit is connected to the second end of the first resonant circuit, and an output terminal of the first comparison circuit is connected to a controller of the cooking appliance, so that the controller can output the first driving instruction according to a comparison result of the first comparison circuit,
a second comparator, a first input end of the second comparing circuit is connected to the first end of the second resonant assembly, a second input end of the second comparing circuit is connected to the second end of the second resonant circuit, and an output end of the second comparing circuit is connected to the controller of the cooking appliance, so that the controller outputs the second driving instruction according to a comparison result of the second comparing circuit.
7. The drive control circuit according to claim 5, characterized by further comprising:
a switch connected between the second terminal of the resonant circuit and the second input terminal of the comparison circuit, the switch configured to switch the voltage signal of the first terminal of the first resonant component into the comparison circuit or switch the voltage signal of the first terminal of the second resonant component into the comparison circuit.
8. The drive control circuit according to any one of claims 1 to 7,
the first resonant assembly comprises a first capacitive element and a first inductive element connected in series and/or in parallel;
the second resonant assembly comprises a second capacitive element and a second inductive element connected in series and/or in parallel.
9. The drive control circuit according to any one of claims 1 to 7, characterized by further comprising:
and the output end of the choke coil is connected to the input end of the resonant circuit and used for filtering the power supply signal input to the resonant circuit.
10. 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 resonant assembly and the second resonant assembly, an
And performing frequency reduction treatment and/or amplitude variation treatment on the first resonance assembly and the second resonance assembly.
11. The control method according to claim 10, wherein the synchronous driving of the first resonance assembly and the second resonance assembly, and the down-conversion processing and/or the amplitude-variation processing of the first resonance assembly and the second resonance assembly, specifically comprise:
generating a first driving instruction, converting the first driving instruction into a modulated pulse signal with a first frequency, and sending the modulated pulse signal with the first frequency to the first resonance component;
generating a second driving instruction and converting the second driving instruction into a modulated pulse signal of a second frequency, and transmitting the modulated pulse signal of the second frequency to the second resonance component,
the modulation pulse signal of the first frequency and the modulation pulse signal of the second frequency are synchronous signals, and the first frequency and the second frequency are in integral multiple relation.
12. A cooking appliance, comprising:
the first heating plate and the second heating plate are oppositely arranged;
the drive control circuit of any one of claims 1 to 9, comprising:
a resonant circuit, the resonant circuit comprising:
the first resonance 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 switching circuit provided at an input of the resonant circuit and/or at an output of the resonant circuit, the switching circuit being configured to control the first resonant assembly and the second resonant assembly to operate alternately.
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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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| 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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| 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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| CN113133145B (en) | 2023-12-22 |
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