CN110338630B - Electromagnetic heating cooking utensil and heating control circuit and control method thereof - Google Patents
Electromagnetic heating cooking utensil and heating control circuit and control method thereof Download PDFInfo
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- CN110338630B CN110338630B CN201810290875.8A CN201810290875A CN110338630B CN 110338630 B CN110338630 B CN 110338630B CN 201810290875 A CN201810290875 A CN 201810290875A CN 110338630 B CN110338630 B CN 110338630B
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/24—Warming devices
- A47J36/2483—Warming devices with electrical heating means
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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
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- Induction Heating Cooking Devices (AREA)
Abstract
The invention discloses an electromagnetic heating cooking utensil and a heating control circuit and a control method thereof, wherein the circuit comprises: a first resonance unit; a second resonance unit; a first power switch; a second power switch; a first synchronization unit outputting a first synchronization signal by detecting voltages at both ends of the first resonance unit; a second synchronization unit outputting a second synchronization signal by detecting a voltage across the second resonance unit; and a control unit for generating a driving signal for driving the first power switch by selecting the first synchronization signal, generating a driving signal for driving the second power switch by selecting the second synchronization signal, and generating a driving signal for driving the first power switch and the second power switch by selecting one of the first synchronization signal and the second synchronization signal according to a heating mode of the electromagnetic heating cooking appliance, thereby improving heating efficiency and lifespan of the power switches.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a heating control circuit of an electromagnetic heating cooking appliance, the electromagnetic heating cooking appliance and a heating control method of the electromagnetic heating cooking appliance.
Background
Most of electromagnetic heating cooking appliances (such as an electromagnetic oven, an electric cooker, an electric pressure cooker and the like) adopt one coil for heating, most of firepower is concentrated near the center of the bottom of the cooker, and the heating is uneven due to the concentrated firepower, so that users complain about poor cooking effect.
At present, a part of cookers adopt a heating scheme of an inner ring and an outer ring of double coil discs to form two independent resonance systems, the effect is greatly improved, but the two resonance systems adopt independent synchronous circuits respectively and work in a free resonance mode. However, this solution presents a problem: because the inner and outer ring coil panels are arranged in the same cooker, the distance between the inner and outer ring coil panels is short, when the two coils work simultaneously, the magnetic fields between the inner and outer ring coil panels can generate mutual coupling interference, and because of independent resonance, the work is asynchronous, sometimes the magnetic fields are superposed in the same direction and sometimes reversely, the synthesized vector magnetic field is unstable, the synchronous circuit is unstable, the heating efficiency is low, even the switch tube can be damaged, and the service life of the product is influenced.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, a first object of the present invention is to provide a heating control circuit for an electromagnetic heating cooking appliance, which can improve the heating uniformity of the electromagnetic heating cooking appliance, increase the heating efficiency of the cooking system and prolong the service life of a switch tube by adding a dual-path resonant heating system capable of selecting a synchronous signal trigger source.
A second object of the present invention is to provide an electromagnetic heating cooking appliance.
A third object of the present invention is to provide a heating control method for an electromagnetic heating cooking appliance.
In order to achieve the above object, a first embodiment of the present invention provides a heating control circuit of an electromagnetic heating cooking appliance, including: a first resonance unit; one end of the second resonance unit is connected with one end of the first resonance unit and then is connected to a power supply module of the electromagnetic heating cooking appliance, wherein the first resonance unit comprises a first resonance capacitor and a first coil panel which are connected in parallel, the second resonance unit comprises a second resonance capacitor and a second coil panel which are connected in parallel, and the first coil panel and the second coil panel are arranged in an inner ring and an outer ring; a first end of the first power switch is connected with the other end of the first resonance unit, and the first power switch is used for controlling whether the first resonance unit performs resonance operation; a first end of the second power switch is connected with the other end of the second resonance unit, a second end of the second power switch is connected with a second end of the first power switch and then grounded, and the second power switch is used for controlling whether the second resonance unit performs resonance operation; a first synchronization unit connected to both ends of the first resonance unit, the first synchronization unit outputting a first synchronization signal by detecting a voltage across the first resonance unit; a second synchronization unit connected to both ends of the second resonance unit, the second synchronization unit outputting a second synchronization signal by detecting a voltage across the second resonance unit; a control unit including a first synchronization signal detection terminal, a second synchronization signal detection terminal, a first driving output terminal and a second driving output terminal, the first synchronization signal detection terminal being connected to an output terminal of the first synchronization unit, the second synchronization signal detection terminal being connected to an output terminal of the second synchronization unit, the first driving output terminal being connected to a control terminal of the first power switch, the second driving output terminal being connected to a control terminal of the second power switch, the control unit generating a driving signal for driving the first power switch by selecting the first synchronization signal according to a heating mode of the electromagnetic heating cooking appliance, generating a driving signal for driving the second power switch by selecting the second synchronization signal, and generating a driving signal for driving the first power switch and the second power switch by selecting one of the first synchronization signal and the second synchronization signal The drive signal of (1).
According to the heating control circuit of the electromagnetic heating cooking appliance, the control unit generates the driving signal for driving the first power switch by selecting the first synchronous signal, generates the driving signal for driving the second power switch by selecting the second synchronous signal and generates the driving signal for driving the first power switch and the second power switch by selecting one of the first synchronous signal and the second synchronous signal according to the heating mode of the electromagnetic heating cooking appliance. Therefore, the double-channel resonance heating system capable of selecting the synchronous signal trigger source is added, so that the heating efficiency of the cooking system and the service life of the switch tube can be improved.
In addition, the heating control circuit of the electromagnetic heating cooking appliance according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the present invention, the first coil pad and the second coil pad have the same inductance and the same winding direction, and the first resonant capacitor and the second resonant capacitor have the same capacitance.
According to one embodiment of the invention, the control unit comprises: the output end of the first driving circuit is connected with the control end of the first power switch, and the first driving circuit is used for driving the first power switch to be switched on or switched off; the output end of the second driving circuit is connected with the control end of the second power switch, and the second driving circuit is used for driving the second power switch to be switched on or switched off; a controller generating a first control signal according to the first synchronization signal to output a driving signal through the first driving circuit, generating a second control signal according to the second synchronization signal to output a driving signal through the second driving circuit, and generating a third control signal according to one of the first synchronization signal and the second synchronization signal to output a driving signal through the first driving circuit and the second driving circuit, respectively.
According to one embodiment of the invention, the controller comprises: a first pulse generator and a second pulse generator; a first end of the first selection switch is connected with the output end of the first synchronization unit, and a second end of the first selection switch is connected with the first pulse generator; a first end of the second selector switch is connected with the output end of the second synchronization unit, a second end of the second selector switch is connected with the second pulse generator, and a third end of the second selector switch is connected with a third end of the first selector switch; a first end of the third selector switch is connected with the output end of the first synchronization unit, a second end of the third selector switch is respectively connected with a third end of the first selector switch and a third end of the second selector switch, and a third end of the third selector switch is connected with a first end of the second selector switch; wherein the controller selects one of the first synchronization signal, the second synchronization signal, or the first synchronization signal and the second synchronization signal by controlling the first selection switch, the second selection switch, and the third selection switch.
According to an embodiment of the present invention, when the first terminal of the first selection switch is communicated with the second terminal, the controller outputs a first control signal through the first pulse generator according to the first synchronization signal, and the first resonance unit performs a resonance operation; when the first end and the second end of the second selection switch are communicated, the controller outputs a second control signal through the second pulse generator according to the second synchronous signal, and the second resonance unit performs resonance operation; when the second end of the first selector switch is communicated with the third end, the second end of the second selector switch is communicated with the third end, and the first end of the third selector switch is communicated with the second end, the controller outputs control signals through the first pulse generator and the second pulse generator respectively according to the first synchronous signal, and the first resonance unit and the second resonance unit perform resonance operation simultaneously; when the second end of the first selector switch is communicated with the third end, the second end of the second selector switch is communicated with the third end, and the second end of the third selector switch is communicated with the third end, the controller outputs control signals through the first pulse generator and the second pulse generator respectively according to the second synchronous signal, and the first resonance unit and the second resonance unit perform resonance operation simultaneously.
According to an embodiment of the invention, the first synchronization unit and the second synchronization unit each comprise a comparator and share one detection branch.
In order to achieve the above object, a second aspect of the present invention provides an electromagnetic heating cooking appliance, which includes the heating control circuit of the electromagnetic heating cooking appliance.
According to the electromagnetic heating cooking appliance provided by the embodiment of the invention, the heating efficiency of the cooking system and the service life of the switch tube can be improved through the heating control circuit of the electromagnetic heating cooking appliance.
In order to achieve the above object, a third embodiment of the present invention provides a heating control method for an electromagnetic heating cooking appliance, including the steps of: receiving a heating power instruction, and acquiring a heating mode of the electromagnetic heating cooking appliance according to the heating power instruction; according to the heating mode of the electromagnetic heating cooking appliance, the first synchronous signal is selected to generate a driving signal for driving the first power switch, or the second synchronous signal is selected to generate a driving signal for driving the second power switch, or one of the first synchronous signal and the second synchronous signal is selected to generate a driving signal for driving the first power switch and the second power switch.
According to the heating control method of the electromagnetic heating cooking appliance, the heating power instruction is received, the heating mode of the electromagnetic heating cooking appliance is obtained according to the heating power instruction, and according to the heating mode of the electromagnetic heating cooking appliance, the first synchronous signal is selected to generate the driving signal for driving the first power switch, the second synchronous signal is selected to generate the driving signal for driving the second power switch, or one of the first synchronous signal and the second synchronous signal is selected to generate the driving signal for driving the first power switch and the second power switch. Therefore, the method can improve the heating efficiency of the cooking system and the service life of the switch tube.
Advantages of additional aspects 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
Fig. 1 is a block schematic diagram of a heating control circuit of an electromagnetic heating cooking appliance according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a heating control circuit of an electromagnetic heating cooking appliance according to one embodiment of the present invention;
fig. 3 is a block schematic diagram of an electromagnetic heating cooking appliance according to an embodiment of the present invention;
fig. 4 is a flowchart of a heating control method of an electromagnetic heating cooking appliance according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The heating control circuit of the electromagnetic heating cooking appliance, the electromagnetic heating cooking appliance and the heating control method of the electromagnetic heating cooking appliance proposed by the present invention are described below with reference to the accompanying drawings.
Fig. 1 is a block schematic diagram of a heating control circuit of an electromagnetic heating cooking appliance according to an embodiment of the present invention. Fig. 2 is a schematic diagram of a heating control circuit of an electromagnetic heating cooking appliance according to an embodiment of the present invention.
As shown in fig. 1 and 2, the heating control circuit of the electromagnetic heating cooking appliance according to the embodiment of the present invention may include: a first resonance unit 10, a second resonance unit 20, a first power switch 30, a second power switch 40, a first synchronization unit 50, a second synchronization unit 60 and a control unit 70.
Wherein, one end of the second resonance unit 20 is connected to one end of the first resonance unit 10 and then connected to the power supply module 80 of the electromagnetic heating cooking appliance, wherein, the first resonance unit 10 comprises a first resonance capacitor C1 and a first coil plate COL1 which are connected in parallel, the second resonance unit 20 comprises a second resonance capacitor C2 and a second coil plate COL2 which are connected in parallel, and the first coil plate COL1 and the second coil plate COL2 are arranged in an inner and outer ring. A first terminal of the first power switch 30 is connected to the other terminal of the first resonance unit 10, and the first power switch 30 is used for controlling whether the first resonance unit 10 performs a resonance operation. A first end of the second power switch 40 is connected to the other end of the second resonant unit 20, a second end of the second power switch 40 is connected to the second end of the first power switch 30 and then grounded, and the second power switch 40 is used to control whether the second resonant unit 20 performs resonant operation. The first synchronization unit 50 is connected to both ends of the first resonance unit 10, and the first synchronization unit 50 outputs a first synchronization signal by detecting a voltage across the first resonance unit 10. The second synchronizing unit 60 is connected to both ends of the second resonance unit 20, and the second synchronizing unit 60 outputs a second synchronizing signal by detecting a voltage across the second resonance unit 20.
The control unit 70 may include a first synchronization signal detection terminal SYNC1, a second synchronization signal detection terminal SYNC2, a first driving output terminal PPG1 and a second driving output terminal PPG2, the first synchronization signal detection terminal SYNC1 is connected to the output terminal of the first synchronization unit 50, the second synchronization signal detection terminal SYNC2 is connected to the output terminal of the second synchronization unit 60, the first driving output terminal PPG1 is connected to the control terminal of the first power switch 30, the second driving output terminal PPG2 is connected to the control terminal of the second power switch 40, the control unit 70 controls the heating mode of the electromagnetic heating cooking appliance, by selecting the first synchronization signal to generate a drive signal to drive the first power switch 30, and by selecting the second synchronization signal to generate a drive signal to drive the second power switch 40, and generating a driving signal for driving the first and second power switches 30 and 40 by selecting one of the first and second synchronization signals.
In addition, referring to fig. 1 and 2, the heating control circuit of the electromagnetic heating cooking appliance may further include: the rectifier module 90 and the filter module 100, wherein the rectifier module 90 is composed of diodes D1-D4, and is used for converting alternating current input by the power supply module 80 into direct current; the filtering module 100 is composed of an inductor L1 and a capacitor C3, and is used for converting a varying ripple voltage into a smooth voltage.
According to an embodiment of the present invention, the first and second coil disks COL1 and COL2 have the same inductance and the same winding direction, and the first and second resonant capacitors C1 and C2 have the same capacitance. The resonant frequencies of the first resonant unit 10 and the second resonant unit 20 are the same when performing resonant operation, the phases of the magnetic fields generated by the first coil panel COL1 and the second coil panel COL2 keep zero phase difference at any moment, the resultant magnetic field is strongest, the heating efficiency is highest, and meanwhile, the first synchronous unit 50 and the second synchronous unit 60 are more stable, the operation of the first power switch and the second power switch is safer, and the service life of the power switch is effectively prolonged.
According to an embodiment of the present invention, as shown in fig. 2, the first synchronization unit 50 and the second synchronization unit 60 may each include a comparator and share one detection branch. That is, the first synchronization unit 50 may include resistors R1, R2, R3, R4, capacitors C4, C5, and a comparator CMP 1. The second synchronization unit 60 may include: resistors R1, R2, R5 and R6, capacitors C4 and C6 and a comparator CMP 2. The synchronous unit comprises a voltage division sampling circuit and a comparator, the resistors R1 and R2 and the capacitor C4 form the voltage division sampling circuit and are used for collecting the voltage of the point A of the resonant unit, and the first synchronous unit 50 and the second synchronous unit 60 share the voltage division sampling circuit and are respectively used for collecting the voltage of the point A of the first resonant unit 10 and the voltage of the point A of the second resonant unit 20. The resistors R3 and R4 and the capacitor C5 form a voltage division sampling circuit, and the voltage division sampling circuit is used for collecting the voltage of the point B of the first resonance unit 10; the resistors R5 and R6 and the capacitor C6 form a voltage division sampling circuit for collecting the voltage at the point C of the second resonant unit 20. The comparator CMP1 is for comparing the voltage at the point a of the first resonant cell 10 with the voltage at the point B to output a synchronization signal, and the comparator CMP2 is for comparing the voltage at the point a of the second resonant cell 20 with the voltage at the point C to output a synchronization signal. For example, when the voltage at the point a is larger than the voltage at the point B, the voltage at the non-inverting input terminal of the comparator CMP1 is smaller than the voltage at the inverting input terminal, the comparator CMP1 outputs a low-level signal, and when the voltage at the point a is smaller than the voltage at the point B, the voltage at the non-inverting input terminal of the comparator CMP1 is larger than the voltage at the inverting input terminal, and the comparator CMP1 outputs a high-level signal.
Specifically, after the electromagnetic heating cooking appliance is powered on to work, a heating power instruction set by a user is received, and a heating mode of the electromagnetic heating cooking appliance is obtained according to the heating power instruction. For example, when the heating power is small, the heating system corresponding to the first resonance unit 10 may be controlled to operate, or the heating system corresponding to the second resonance unit 20 may be controlled to operate; when the heating power is larger, the heating systems corresponding to the first resonance unit 10 and the second resonance unit 20 can be controlled to work at the same time. The control unit 70 switches the trigger source according to the heating mode, for example, when the heating system corresponding to the first resonance unit 10 is selected to operate (inner coil panel operation), the first synchronization unit 50 acquires the resonance voltage across the first coil panel COL1 (i.e., the voltage across the first capacitor C1) through the sampling circuit to output a first synchronization signal (e.g., a falling edge signal) to the control unit 70, the control unit 70 outputs an effective pulse signal through the first driving output terminal PPG1 to control the first power switch 30 to turn on and off, and the first power switch 30 controls the power supply module 80 to be connected to and disconnected from the first resonance unit 10 according to the driving signal. When the first driving output end outputs a high level signal, the first power switch 30 is turned on, the first resonance unit 10 is connected to the power supply module 80 to store energy for the first coil panel COL1, and the first resonance unit 10 converts electric field energy into electromagnetic energy to heat the electromagnetic heating cooking appliance; when the first driving output terminal outputs a low level signal, the first power switch 30 is turned off, and the first resonance unit 10 is disconnected from the power supply module 80.
Similarly, when the heating system corresponding to the second resonance unit 20 is selected to operate, the control method is the same as that of the first resonance unit 10; when the two heating systems are simultaneously operated, the control unit 70 may control the first resonance unit and the second resonance unit to be simultaneously operated according to the first synchronization signal and the second synchronization signal, respectively, and the control method may be combined with the process when the first resonance unit 10 and the second resonance unit 20 are operated, and the specific steps will be described in detail in the following embodiments.
Further, according to an embodiment of the present invention, as shown in fig. 2, the control unit 70 may include: a first drive circuit 71, a second drive circuit 72, and a controller 73. The output end of the first driving circuit 71 is connected to the control end of the first power switch 30, and the first driving circuit 71 is used for driving the first power switch 30 to be turned on or off. The output terminal of the second driving circuit 72 is connected to the control terminal of the second power switch 40, and the second driving circuit 72 is used to drive the second power switch 30 to be turned on or off. The controller 73 generates a first control signal according to the first synchronization signal to output the driving signal through the first driving circuit 71, generates a second control signal according to the second synchronization signal to output the driving signal through the second driving circuit 72, and generates a third control signal according to one of the first synchronization signal and the second synchronization signal to output the driving signal through the first driving circuit 71 and the second driving circuit 72, respectively.
That is, the driving circuit is configured to convert the signal level range output by the controller 73 into a level signal range that can be received by the power switch, for example, the low level output by the controller 73 is 0V, the high level output by the controller 73 is 5V, the low level that can be received by the power switch is 0V, and the high level output by the power switch is 18V, so that the first driving circuit 71 is configured to convert the high level 5V output by the controller 73 through the first driving output PPG1 into the high level 18V that can be received by the first power switch 30, so as to drive the first power switch 30 to operate.
According to an embodiment of the present invention, as shown in fig. 2, the controller 73 may include: a first pulse generator 731, a second pulse generator 732, a first selection switch 733, a second selection switch 734, and a third selection switch 735. A first terminal of the first selection switch 733 is connected to an output terminal of the first synchronization unit 50, and a second terminal of the first selection switch 733 is connected to the first pulse generator 731. A first terminal of the second selection switch 734 is connected to the output terminal of the second synchronization unit 60, a second terminal of the second selection switch 734 is connected to the second pulse generator 732, and a third terminal of the second selection switch 734 is connected to a third terminal of the first selection switch 733. A first terminal of the third selector switch 735 is connected to the output terminal of the first synchronization unit 50, a second terminal of the third selector switch 735 is respectively connected to a third terminal of the first selector switch 733 and a third terminal of the second selector switch 734, and a third terminal of the third selector switch 735 is connected to a first terminal of the second selector switch 734. Wherein the controller 73 selects one of the first synchronization signal, the second synchronization signal, or the first synchronization signal and the second synchronization signal by controlling the first selection switch 733, the second selection switch 734, and the third selection switch 735.
Further, according to an embodiment of the present invention, when the first terminal and the second terminal of the first selection switch 733 are communicated, the controller 73 outputs a first control signal through the first pulse generator 731 according to the first synchronization signal, and the first resonance unit 10 performs a resonance operation. When the first end and the second end of the second selection switch 734 are communicated, the controller 73 outputs a second control signal through the second pulse generator 732 according to the second synchronization signal, and the second resonance unit 20 performs a resonance operation. When the second terminal of the first selection switch 733 is communicated with the third terminal, the second terminal of the second selection switch 734 is communicated with the third terminal, and the first terminal of the third selection switch 735 is communicated with the second terminal, the controller 73 outputs control signals through the first pulse generator 731 and the second pulse generator 732, respectively, according to the first synchronization signal, and the first resonance unit 10 and the second resonance unit 20 perform resonance operation at the same time. When the second terminal of the first selection switch 733 is connected to the third terminal, the second terminal of the second selection switch 734 is connected to the third terminal, and the second terminal of the third selection switch 735 is connected to the third terminal, the controller 73 outputs control signals through the first pulse generator 731 and the second pulse generator 732 according to the second synchronization signal, and the first resonance unit 10 and the second resonance unit 20 perform resonance operation at the same time.
The process of the first coil plate and the second coil plate when operating will be described in detail below.
(1) Operation of the first coil disk (inner coil disk) heating mode.
The first terminal (i) and the second terminal (ii) of the first selection switch 733 are turned on, and the first synchronization signal is supplied to the Trg1 input terminal of the first pulse generator 731 through the first selection switch 733 via the first synchronization signal input terminal SYNC 1. The controller 73 sets the START1 flag, and inputs a trigger signal (first synchronization signal) to the Trg1 input terminal of the first pulse generator 731, to START the first pulse output.
In stage 1, the controller 73 controls the first pulse generator 731 to output a first control signal, i.e. an active signal, in this embodiment, the active signal is at a high level of 5V, and the inactive signal is at a low level of 0V, the first driving circuit 71 outputs a high level signal (e.g. 18V), the C electrode (collector) and the E electrode (emitter) of the first power switch 30 are connected and conducted, the first coil panel COL1 in the first resonant unit 10 obtains power from the power supply module 80, the current linearly increases from zero, and after a period of time t1, the current value reaches I1, at this time, the voltage at the point a is greater than the voltage at the point B, the voltage at the inverting terminal of the comparator CMP1 is greater than the voltage at the inverting terminal, and the output terminal of the comparator CMP1 outputs a low level signal.
In phase 2, after that, the controller 73 controls the first pulse generator 731 to output an invalid signal (e.g. 0V), the first driving circuit 71 outputs a low level signal (e.g. 0V), the C pole and the E pole of the first power switch 30 are disconnected, since the current of the first coil panel COL1 cannot suddenly change, the current of the first coil panel COL1 flows through the first resonant capacitor C1, and at the same time, the first resonant capacitor C1 discharges the first coil panel COL1, the voltage at the point a and the voltage at the point B across the first resonant capacitor C1 gradually decrease, and when the voltage at the point a and the voltage at the point B across the first resonant capacitor C1 are 0V, the current of the first coil panel COL1 reaches a maximum value. At the next moment, the first coil panel COL1 maintains the characteristic that the current cannot change suddenly to charge the first resonant capacitor C1, the voltage at the point a at the two ends of the first resonant capacitor 1 is less than the voltage at the point B, the voltage at the non-inverting end of the comparator CMP1 is higher than the voltage at the inverting end, and the output end of the comparator CMP1 outputs a rising edge voltage reversal signal from low level to high level.
In phase 3, the charging current of the first coil panel COL1 to the first resonant capacitor C1 gradually decreases to 0, the voltage across the first resonant capacitor C1 reaches the maximum value, and the voltage at the point a is smaller than the voltage at the point B. Thereafter, the first resonant capacitor C1 discharges the first coil pad COL1, and when the voltage across the first resonant capacitor C1 discharges to 0V, the current of the first coil pad COL1 reaches a maximum value. At the next moment, the first coil panel COL1 maintains the characteristic that the current cannot change suddenly to charge the first resonant capacitor C1, the voltage of the point a at the two ends of the first resonant capacitor C1 is greater than the voltage of the point B, the voltage of the inverting terminal of the comparator CMP1 is greater than the voltage of the non-inverting terminal, and the output terminal of the comparator CMP1 outputs a falling edge voltage reversal signal from high level to low level.
After the falling edge voltage inversion signal is input to the first synchronization signal detection end SYNC1 of the controller 73, the falling edge voltage inversion signal is sent to the input end Trg1 of the first pulse generator 731 through the first selection switch 733, the first pulse generator 731 is automatically triggered to output an effective signal of the next period, and the process of stage 1 is repeated. Thereby achieving resonant heating of the inner coil disk.
(2) And the second coil disc (outer coil disc) is in the heating mode.
The first terminal (pin) and the second terminal (pin) of the second selection switch 734 are turned on, and the second synchronization signal is provided to the Trg2 input terminal of the second pulse generator 732 through the second synchronization signal input terminal SYNC2 via the second selection switch 734. The controller 73 sets the START2 flag, and inputs a trigger signal (second synchronization signal) to the Trg2 input of the second pulse generator 732 to START outputting the first pulse.
In stage 1, the controller 73 controls the second pulse generator 732 to output a second control signal, i.e., an active signal, according to the second synchronization signal, the second driving circuit 72 outputs a high level signal (e.g., 18V), the C electrode and the E electrode of the second power switch 40 are connected and conducted, the second coil panel COL2 in the second resonant unit 20 obtains power from the power module 80, the current linearly increases from zero, and after a period of time t 1', the current value reaches I1, at this time, the voltage at point a is greater than the voltage at point C, the voltage at the inverting terminal of the comparator CMP2 is greater than the voltage at the non-inverting terminal, and the output terminal of the comparator CMP2 outputs a low level signal.
Stage 2, after that, the controller 73 controls the second pulse generator 732 to output an invalid signal (e.g. 0V), the second driving circuit 72 outputs a low level signal (e.g. 0V), the C pole and the E pole of the second power switch 40 are disconnected, since the current of the second coil COL2 cannot suddenly change, the current of the second coil COL2 flows through the second resonant capacitor C2, and the second capacitor C2 discharges the second coil COL2, the voltage at the point a and the voltage at the point C across the second capacitor C2 gradually decrease, and when the voltage at the point a and the voltage at the point C across the second capacitor C2 are 0V, the current of the second coil COL2 reaches a maximum value. At the next moment, the second coil panel COL2 maintains the characteristic that the current cannot suddenly change to charge the second capacitor C2, the voltage of the point a at the two ends of the second capacitor C3 is smaller than the voltage of the point C, the voltage of the non-inverting terminal of the comparator CMP2 is higher than the voltage of the inverting terminal, and the output terminal of the comparator CMP2 outputs a rising edge voltage reversal signal from low level to high level.
In phase 3, the charging current of the second capacitor C2 by the second coil COL2 gradually decreases to 0, the voltage across the second capacitor C2 reaches the maximum value, and the voltage at point a is smaller than the voltage at point C. Thereafter, the second capacitor C2 discharges the second coil plate COL2, and when the voltage across the second capacitor C2 is discharged to 0V, the current of the second coil plate COL2 reaches a maximum value. At the next moment, the second coil plate COL2 maintains the characteristic that the current cannot suddenly change to charge the second capacitor C2, the voltage of the point a at the two ends of the second resonant capacitor C2 is greater than the voltage of the point C, the voltage of the inverting end of the comparator CMP2 is greater than the voltage of the non-inverting end, and the output end of the comparator CMP2 outputs a falling edge voltage reversal signal from high level to low level.
After the falling edge voltage inversion signal is input to the second synchronization signal detection end SYNC2 of the controller 73, the falling edge voltage inversion signal is sent to the input end Trg2 of the second pulse generator 732 through the second selection switch 734, and the second pulse generator 732 is automatically triggered to output an effective signal of the next period, and the process of stage 1 is repeated. Thereby achieving resonant heating of the outer coil disk.
(3) And the inner and outer ring coil discs simultaneously heat (the controller controls the first resonance unit and the second resonance unit to simultaneously work according to the first synchronous signal) the working process.
The first terminal of the third selection switch 735 is connected to the second terminal, the second terminal of the first selection switch 733 is connected to the third terminal, the second terminal of the second selection switch 734 is connected to the third terminal, and the first synchronization signal is transmitted to the Trg1 input terminal of the first pulse generator 731 and the Trg2 input terminal of the second pulse generator 732 through the first selection switch 733, the second selection switch 734, and the third selection switch 735. The controller 73 sets the flag bits START1 and START2, and inputs a trigger signal (first synchronization signal) to the Trg1 input of the first pulse generator 731 and the Trg2 input of the second pulse generator 732, thereby starting the first pulse output.
In stage 1, the controller 73 controls the first pulse generator 731 and the second pulse generator 732 to output active signals simultaneously according to the first synchronization signal, the first driving circuit 71 and the second driving circuit 72 output high level signals (e.g. 18V), the first power switch 30 and the second power switch 40 are turned on simultaneously, and the subsequent operation process is the same as the operation of the inner loop and the outer loop, except that the first synchronization signal is sent to the Trg1 input terminal of the first pulse generator 731 and the Trg2 input terminal of the second pulse generator 732 after passing through the internal selection switch, the first synchronization signal is used to trigger the first pulse generator 731 and the second pulse generator 732 to output active signals of the next cycle, and then the stage 1 process is repeated. Therefore, the inner ring coil disc and the outer ring coil disc are controlled to be simultaneously heated in a resonant mode through the first synchronous signal.
(4) And the inner ring coil panel and the outer ring coil panel simultaneously heat (the controller controls the first resonance unit and the second resonance unit to simultaneously work according to the second synchronous signal) the working process.
The second terminal and the third terminal of the third selector switch 735 are conducted, the second terminal and the third terminal of the first selector switch 733 are conducted, the second terminal and the third terminal of the second selector switch 734 are conducted, and the second synchronous signal is respectively sent to the input terminal of the Trg1 of the first pulse generator 731 and the input terminal of the Trg2 of the second pulse generator 732 through the first selector switch 733, the second selector switch 734 and the third selector switch 735. The controller 73 sets the flag bits START1 and START2, and inputs a trigger signal (second synchronization signal) to the Trg1 input of the first pulse generator 731 and the Trg2 input of the second pulse generator 732, thereby starting the first pulse output.
In stage 1, the controller 73 controls the first pulse generator 731 and the second pulse generator 732 to output active signals simultaneously according to the second synchronization signal, the first driving circuit 71 and the second driving circuit 72 output high level signals (e.g. 18V), the first power switch 30 and the second power switch 40 are turned on simultaneously, and the subsequent operation process is the same as the operation of the inner loop and the outer loop, except that the second synchronization signal is sent to the Trg1 input terminal of the first pulse generator 731 and the Trg2 input terminal of the second pulse generator 732 after passing through the internal selection switch, the second synchronization signal is used to trigger the first pulse generator 731 and the second pulse generator 732 to output active signals of the next cycle, and then the stage 1 process is repeated. Therefore, the inner ring coil disc and the outer ring coil disc are controlled to be simultaneously heated in a resonant mode through the first synchronous signal.
From the above (1) - (4), when the inner and outer ring single-ring coil discs work, the controller 73 selects the synchronous trigger signal of its own resonance unit to control, which is equivalent to a single-coil disc heating cooker, and the mode of controlling the two resonance units to work alternately can make the cooker heat more uniformly. When the inner and outer coil panels are heated simultaneously, the controller 73 uses the same synchronous trigger source for the two pulse generators according to the system configuration, and the trigger source can select the first synchronous signal inputted from the first synchronous signal detection terminal SYNC1 or the second synchronous signal inputted from the second synchronous signal detection terminal SYNC2, and uses the same synchronous signal to trigger the first pulse generator and the second pulse generator, so that the first power switch 30 and the second power switch 40 are turned on and off simultaneously, and then are resonated simultaneously after being turned off. The first coil panel COL1 and the second coil panel COL2 adopt the same inductance, the winding directions are the same, the capacitances of the first capacitor C1 and the second capacitor C2 are the same, the resonant frequencies of the two resonant units are the same, the phase difference of the magnetic fields generated by the two coil panels is kept at zero degree at any moment, the synthesized magnetic field is strongest, the heating efficiency is highest, meanwhile, the synchronous circuit is stable, the power switch works more safely, and the service life of the power switch is prolonged.
In summary, according to the heating control circuit of the electromagnetic heating cooking appliance of the present invention, the control unit generates the driving signal for driving the first power switch by selecting the first synchronization signal, generates the driving signal for driving the second power switch by selecting the second synchronization signal, and generates the driving signal for driving the first power switch and the second power switch by selecting one of the first synchronization signal and the second synchronization signal according to the heating mode of the electromagnetic heating cooking appliance. Therefore, the double-channel resonance heating system capable of selecting the synchronous signal trigger source is added, so that the heating efficiency of the cooking system and the service life of the switch tube can be improved.
Fig. 3 is a block schematic diagram of an electromagnetic heating cooking appliance according to an embodiment of the present invention. As shown in fig. 3, the electromagnetic heating cooking apparatus 1000 may include the heating control circuit 1100 of the electromagnetic heating cooking apparatus described above.
According to the electromagnetic heating cooking appliance provided by the embodiment of the invention, the heating efficiency of the cooking system and the service life of the switch tube can be improved through the heating control circuit of the electromagnetic heating cooking appliance.
Fig. 4 is a flowchart of a heating control method of an electromagnetic heating cooking appliance according to an embodiment of the present invention. As shown in fig. 4, the heating control method of the electromagnetic heating cooking appliance may include the steps of:
and S1, receiving the heating power instruction, and acquiring the heating mode of the electromagnetic heating cooking appliance according to the heating power instruction.
S2, generating a driving signal for driving the first power switch by selecting the first synchronization signal, or generating a driving signal for driving the second power switch by selecting the second synchronization signal, or generating a driving signal for driving the first power switch and the second power switch by selecting one of the first synchronization signal and the second synchronization signal, according to a heating mode of the electromagnetic heating cooking appliance.
According to an embodiment of the present invention, an electromagnetic heating cooking appliance may include: the output end of the first driving circuit is connected with the control end of the first power switch, and the first driving circuit is used for driving the first power switch to be switched on or switched off; the output end of the second driving circuit is connected with the control end of the second power switch, and the second driving circuit is used for driving the second power switch to be switched on or switched off; a controller generating a first control signal according to the first synchronization signal to output the driving signal through the first driving circuit, generating a second control signal according to the second synchronization signal to output the driving signal through the second driving circuit, and generating a third control signal according to one of the first synchronization signal and the second synchronization signal to output the driving signal through the first driving circuit and the second driving circuit, respectively, wherein the controller includes: a first pulse generator and a second pulse generator; the first end of the first selection switch is connected with the output end of the first synchronization unit, and the second end of the first selection switch is connected with the first pulse generator; a first end of the second selector switch is connected with the output end of the second synchronization unit, a second end of the second selector switch is connected with the second pulse generator, and a third end of the second selector switch is connected with a third end of the first selector switch; a first end of the third selector switch is connected with the output end of the first synchronization unit, a second end of the third selector switch is respectively connected with a third end of the first selector switch and a third end of the second selector switch, and the third end of the third selector switch is connected with the first end of the second selector switch; and, the controller selects one of the first synchronization signal, the second synchronization signal, or the first synchronization signal and the second synchronization signal by controlling the first selection switch, the second selection switch, and the third selection switch.
According to an embodiment of the present invention, when the first terminal of the first selection switch is communicated with the second terminal, the controller outputs a first control signal through the first pulse generator according to the first synchronization signal, and the first resonance unit performs a resonance operation; when the first end of the second selection switch is communicated with the second end, the controller outputs a second control signal through the second pulse generator according to a second synchronous signal, and the second resonance unit performs resonance work; when the second end of the first selector switch is communicated with the third end, the second end of the second selector switch is communicated with the third end, and the first end of the third selector switch is communicated with the second end, the controller outputs control signals through the first pulse generator and the second pulse generator respectively according to a first synchronization signal, and the first resonance unit and the second resonance unit perform resonance work simultaneously; when the second end of the first selector switch is communicated with the third end, the second end of the second selector switch is communicated with the third end, and the second end of the third selector switch is communicated with the third end, the controller outputs control signals through the first pulse generator and the second pulse generator respectively according to a second synchronous signal, and the first resonance unit and the second resonance unit perform resonance work simultaneously.
It should be noted that details not disclosed in the heating control method of the electromagnetic heating cooking appliance according to the embodiment of the present invention refer to details disclosed in the heating control circuit of the electromagnetic heating cooking appliance according to the embodiment of the present invention, and detailed description thereof is omitted here.
According to the heating control method of the electromagnetic heating cooking appliance, the heating power instruction is received, the heating mode of the electromagnetic heating cooking appliance is obtained according to the heating power instruction, and according to the heating mode of the electromagnetic heating cooking appliance, the first synchronous signal is selected to generate the driving signal for driving the first power switch, the second synchronous signal is selected to generate the driving signal for driving the second power switch, or one of the first synchronous signal and the second synchronous signal is selected to generate the driving signal for driving the first power switch and the second power switch. Therefore, the method can improve the heating efficiency of the cooking system and the service life of the switch tube.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In addition, in the description of the present invention, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. 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 present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (8)
1. A heating control circuit of an electromagnetic heating cooking appliance, comprising:
a first resonance unit;
one end of the second resonance unit is connected with one end of the first resonance unit and then is connected to a power supply module of the electromagnetic heating cooking appliance, wherein the first resonance unit comprises a first resonance capacitor and a first coil panel which are connected in parallel, the second resonance unit comprises a second resonance capacitor and a second coil panel which are connected in parallel, and the first coil panel and the second coil panel are arranged in an inner ring and an outer ring;
a first end of the first power switch is connected with the other end of the first resonance unit, and the first power switch is used for controlling whether the first resonance unit performs resonance operation;
a first end of the second power switch is connected with the other end of the second resonance unit, a second end of the second power switch is connected with a second end of the first power switch and then grounded, and the second power switch is used for controlling whether the second resonance unit performs resonance operation;
a first synchronization unit connected to both ends of the first resonance unit, the first synchronization unit outputting a first synchronization signal by detecting a voltage across the first resonance unit;
a second synchronization unit connected to both ends of the second resonance unit, the second synchronization unit outputting a second synchronization signal by detecting a voltage across the second resonance unit;
a control unit including a first synchronization signal detection terminal, a second synchronization signal detection terminal, a first driving output terminal and a second driving output terminal, the first synchronization signal detection terminal being connected to an output terminal of the first synchronization unit, the second synchronization signal detection terminal being connected to an output terminal of the second synchronization unit, the first driving output terminal being connected to a control terminal of the first power switch, the second driving output terminal being connected to a control terminal of the second power switch, the control unit generating a driving signal for driving the first power switch by selecting the first synchronization signal according to a heating mode of the electromagnetic heating cooking appliance, generating a driving signal for driving the second power switch by selecting the second synchronization signal, and generating a driving signal for driving the first power switch and the second power switch by selecting one of the first synchronization signal and the second synchronization signal The drive signal of (a) is applied,
the control unit comprises a first driving circuit, a second driving circuit and a controller, wherein the output end of the first driving circuit is connected with the control end of the first power switch, and the first driving circuit is used for driving the first power switch to be switched on or switched off; the output end of the second driving circuit is connected with the control end of the second power switch, and the second driving circuit is used for driving the second power switch to be switched on or switched off; the controller generates a first control signal according to the first synchronization signal to output a driving signal through the first driving circuit, generates a second control signal according to the second synchronization signal to output a driving signal through the second driving circuit, and generates a third control signal according to one of the first synchronization signal and the second synchronization signal to output a driving signal through the first driving circuit and the second driving circuit, respectively,
the controller comprises a first pulse generator, a second pulse generator, a first selection switch, a second selection switch and a third selection switch, wherein the first end of the first selection switch is connected with the output end of the first synchronization unit, and the second end of the first selection switch is connected with the first pulse generator; a first end of the second selector switch is connected with an output end of the second synchronization unit, a second end of the second selector switch is connected with the second pulse generator, and a third end of the second selector switch is connected with a third end of the first selector switch; a first end of the third selector switch is connected with an output end of the first synchronization unit, a second end of the third selector switch is respectively connected with a third end of the first selector switch and a third end of the second selector switch, and the third end of the third selector switch is connected with a first end of the second selector switch; wherein the controller selects one of the first synchronization signal, the second synchronization signal, or the first synchronization signal and the second synchronization signal by controlling the first selection switch, the second selection switch, and the third selection switch.
2. The heating control circuit of an electromagnetic heating cooking device as set forth in claim 1, wherein said first coil plate and said second coil plate have the same inductance and the same winding direction, and said first resonance capacitor and said second resonance capacitor have the same capacitance.
3. The heating control circuit of the electromagnetic heating cooking appliance according to claim 1,
when the first end and the second end of the first selection switch are communicated, the controller outputs a first control signal through the first pulse generator according to the first synchronous signal, and the first resonance unit performs resonance operation;
when the first end and the second end of the second selection switch are communicated, the controller outputs a second control signal through the second pulse generator according to the second synchronous signal, and the second resonance unit performs resonance operation;
when the second end of the first selector switch is communicated with the third end, the second end of the second selector switch is communicated with the third end, and the first end of the third selector switch is communicated with the second end, the controller outputs control signals through the first pulse generator and the second pulse generator respectively according to the first synchronous signal, and the first resonance unit and the second resonance unit perform resonance operation simultaneously;
when the second end of the first selector switch is communicated with the third end, the second end of the second selector switch is communicated with the third end, and the second end of the third selector switch is communicated with the third end, the controller outputs control signals through the first pulse generator and the second pulse generator respectively according to the second synchronous signal, and the first resonance unit and the second resonance unit perform resonance operation simultaneously.
4. The heating control circuit of the electromagnetic heating cooking device according to claim 1, wherein the first synchronization unit and the second synchronization unit each include a comparator and share a detection branch.
5. An electromagnetic heating cooking appliance comprising the heating control circuit of the electromagnetic heating cooking appliance according to any one of claims 1 to 4.
6. A heating control method of an electromagnetic heating cooking appliance according to claim 5, characterized by comprising the steps of:
receiving a heating power instruction, and acquiring a heating mode of the electromagnetic heating cooking appliance according to the heating power instruction;
according to the heating mode of the electromagnetic heating cooking appliance, the first synchronous signal is selected to generate a driving signal for driving the first power switch, or the second synchronous signal is selected to generate a driving signal for driving the second power switch, or one of the first synchronous signal and the second synchronous signal is selected to generate a driving signal for driving the first power switch and the second power switch.
7. The heating control method of the electromagnetic heating cooking appliance according to claim 6, wherein the electromagnetic heating cooking appliance includes:
the output end of the first driving circuit is connected with the control end of the first power switch, and the first driving circuit is used for driving the first power switch to be switched on or switched off;
the output end of the second driving circuit is connected with the control end of the second power switch, and the second driving circuit is used for driving the second power switch to be switched on or switched off;
a controller generating a first control signal according to the first synchronization signal to output a driving signal through the first driving circuit, generating a second control signal according to the second synchronization signal to output a driving signal through the second driving circuit, and generating a third control signal according to one of the first synchronization signal and the second synchronization signal to output a driving signal through the first driving circuit and the second driving circuit, respectively, wherein the controller includes:
a first pulse generator and a second pulse generator;
a first end of the first selection switch is connected with the output end of the first synchronization unit, and a second end of the first selection switch is connected with the first pulse generator;
a first end of the second selector switch is connected with the output end of the second synchronization unit, a second end of the second selector switch is connected with the second pulse generator, and a third end of the second selector switch is connected with a third end of the first selector switch;
a first end of the third selector switch is connected with the output end of the first synchronization unit, a second end of the third selector switch is respectively connected with a third end of the first selector switch and a third end of the second selector switch, and a third end of the third selector switch is connected with a first end of the second selector switch;
and the controller controls the first selection switch, the second selection switch, and the third selection switch to select one of the first synchronization signal, the second synchronization signal, or the first synchronization signal and the second synchronization signal.
8. The heating control method of the electromagnetic heating cooking appliance according to claim 7,
when the first end and the second end of the first selection switch are communicated, the controller outputs a first control signal through the first pulse generator according to the first synchronous signal, and the first resonance unit performs resonance operation;
when the first end and the second end of the second selection switch are communicated, the controller outputs a second control signal through the second pulse generator according to the second synchronous signal, and the second resonance unit performs resonance operation;
when the second end of the first selector switch is communicated with the third end, the second end of the second selector switch is communicated with the third end, and the first end of the third selector switch is communicated with the second end, the controller outputs control signals through the first pulse generator and the second pulse generator respectively according to the first synchronous signal, and the first resonance unit and the second resonance unit perform resonance operation simultaneously;
when the second end of the first selector switch is communicated with the third end, the second end of the second selector switch is communicated with the third end, and the second end of the third selector switch is communicated with the third end, the controller outputs control signals through the first pulse generator and the second pulse generator respectively according to the second synchronous signal, and the first resonance unit and the second resonance unit perform resonance operation simultaneously.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810290875.8A CN110338630B (en) | 2018-04-03 | 2018-04-03 | Electromagnetic heating cooking utensil and heating control circuit and control method thereof |
| EP18913373.9A EP3749055B1 (en) | 2018-04-03 | 2018-10-16 | Electromagnetically heated cooking utensil, and heating control circuit and method therefor |
| US16/977,819 US11751292B2 (en) | 2018-04-03 | 2018-10-16 | Electromagnetically heated cooking utensil, and heating control circuit and method therefor |
| JP2020540796A JP7027562B2 (en) | 2018-04-03 | 2018-10-16 | Electromagnetic heating cookware, its heating control circuit and control method |
| KR1020207022184A KR102327494B1 (en) | 2018-04-03 | 2018-10-16 | Electromagnetic heating cooker, heating control circuit and control method of electromagnetic heating cooker |
| PCT/CN2018/110440 WO2019192157A1 (en) | 2018-04-03 | 2018-10-16 | Electromagnetically heated cooking utensil, and heating control circuit and method therefor |
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| CN201810290875.8A CN110338630B (en) | 2018-04-03 | 2018-04-03 | Electromagnetic heating cooking utensil and heating control circuit and control method thereof |
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| CN113133145B (en) * | 2019-12-31 | 2023-12-22 | 广东美的生活电器制造有限公司 | Cooking appliance, drive control circuit and control method |
| CN111432512B (en) * | 2020-04-16 | 2022-03-18 | 深圳市鑫汇科股份有限公司 | Electromagnetic heating equipment and heating control device and method thereof |
| CN113784470B (en) * | 2021-08-31 | 2023-07-25 | 河北工业大学 | LLC-based induction heating system |
| CN116113089A (en) * | 2022-11-09 | 2023-05-12 | 广东美的厨房电器制造有限公司 | Variable frequency drive circuit and cooking equipment |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3567145B2 (en) * | 2001-07-23 | 2004-09-22 | 象印マホービン株式会社 | Induction heating rice cooker |
| JP3631703B2 (en) * | 2001-07-23 | 2005-03-23 | 象印マホービン株式会社 | Induction heating rice cooker |
| CN2857721Y (en) * | 2005-12-07 | 2007-01-17 | 张志成 | Electro thermal pot with cooking and insulation function |
| CN201775462U (en) * | 2010-04-14 | 2011-03-30 | 山东佳佳恋厨业有限公司 | Multifunctional electric food warmer capable of cooking rice |
| CN102291864A (en) * | 2011-07-26 | 2011-12-21 | 美的集团有限公司 | Multi-ring electromagnetic heating circuit for common driving signal |
| CN105246182A (en) * | 2015-10-23 | 2016-01-13 | 深圳市鑫汇科股份有限公司 | Electromagnetic induction heating device and multi-resonance circuit thereof |
| 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 |
| CN105764175A (en) * | 2014-12-17 | 2016-07-13 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic resonant circuit and electromagnetic heating device |
| CN106162973A (en) * | 2015-04-28 | 2016-11-23 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic resonant circuit, its control method and control system thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2227790Y (en) * | 1994-10-28 | 1996-05-22 | 郑英焕 | Multipurpose electrical cooking range |
| CN2417800Y (en) * | 1999-08-17 | 2001-02-07 | 夏克难 | Heat-regulation type energy-saving electric cooker |
| JP4748356B2 (en) * | 2005-10-13 | 2011-08-17 | サンケン電気株式会社 | Induction heating device |
| CN101808433A (en) * | 2010-03-26 | 2010-08-18 | 九阳股份有限公司 | Convection heating control method of electromagnetic oven and heating control device |
| CN106879095B (en) * | 2015-12-11 | 2023-03-21 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating device and heating control circuit thereof |
-
2018
- 2018-04-03 CN CN201810290875.8A patent/CN110338630B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3567145B2 (en) * | 2001-07-23 | 2004-09-22 | 象印マホービン株式会社 | Induction heating rice cooker |
| JP3631703B2 (en) * | 2001-07-23 | 2005-03-23 | 象印マホービン株式会社 | Induction heating rice cooker |
| CN2857721Y (en) * | 2005-12-07 | 2007-01-17 | 张志成 | Electro thermal pot with cooking and insulation function |
| CN201775462U (en) * | 2010-04-14 | 2011-03-30 | 山东佳佳恋厨业有限公司 | Multifunctional electric food warmer capable of cooking rice |
| CN102291864A (en) * | 2011-07-26 | 2011-12-21 | 美的集团有限公司 | Multi-ring electromagnetic heating circuit for common driving signal |
| 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 |
| CN105764175A (en) * | 2014-12-17 | 2016-07-13 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic resonant circuit and electromagnetic heating device |
| CN106162973A (en) * | 2015-04-28 | 2016-11-23 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic resonant circuit, its control method and control system thereof |
| CN105246182A (en) * | 2015-10-23 | 2016-01-13 | 深圳市鑫汇科股份有限公司 | Electromagnetic induction heating device and multi-resonance circuit thereof |
Non-Patent Citations (2)
| Title |
|---|
| "A Study on the Noise Suppression in High Frequency Acoustic Noise of IH Cooking Heater";YONEMORI,Hironobu;《Journal of the Japan Society of Applied Electromagnetics and Mechanics》;20151231;第23卷(第1期);第213-218页 * |
| "IH电磁加热器可靠性分析与提升方法";伍昆仑;《中国优秀硕士学位论文全文数据库》;20161009(第05期);第54-59页 * |
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