CN108966397A - The power control circuit and Poewr control method of electromagnetic heater - Google Patents
The power control circuit and Poewr control method of electromagnetic heater Download PDFInfo
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- CN108966397A CN108966397A CN201810728193.0A CN201810728193A CN108966397A CN 108966397 A CN108966397 A CN 108966397A CN 201810728193 A CN201810728193 A CN 201810728193A CN 108966397 A CN108966397 A CN 108966397A
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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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- 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
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Abstract
The present invention provides a kind of power control circuit of electromagnetic heater, including rectification module, control module and power tube and resonance modules, the rectification module includes rectifier bridge, the rectifier bridge has first port and second port, the power control circuit further includes the switch being connected with rectifier bridge, the switch switches between first port and second port under the control of the control module, so that the rectifier bridge output current waveform in full-wave rectifier or half wave rectification wave, the control module driving power pipe is worked with controlling resonance modules under current waveform in full-wave rectifier or half wave rectification wave, to export different heating powers.It is switched by setting, the waveform that rectifier bridge is exported is that current waveform in full-wave rectifier or half wave rectification wave realize that circuit is simple and reliable, stability is good to realize high-power heating and the switching of low-power heating by hardware circuit.The present invention also provides a kind of Poewr control methods of electromagnetic heater.
Description
Technical field
The present invention relates to kitchen appliance technical field more particularly to the power control circuits and function of a kind of electromagnetic heater
Rate control method.
Background technique
The principle of heating of electromagnetic heater is to generate alternating magnetic field by electromagnetic heater, the iron being placed in alternating magnetic field
Magnetic material self-heating due to induction.It is relatively conventional using electromagnetic heating in cooking apparatus, such as electromagnetic oven, IH rice cooker, it adopts
With the cooking apparatus of electromagnetic heating because its thermal efficiency is high, cleaning, facilitate due to be greatly favored by consumers.The cooking apparatus of electromagnetic heating needs
EMR electromagnetic resonance is realized using IGBT alternating on-off, in high-power heating, IGBT working condition is preferable, but in low-power heating
When, IGBT loss increase, temperature rise raising, service life reduction, so that cooking apparatus job insecurity.For this purpose, industry is small in order to realize
Power electromagnet heating, generallys use such as under type: 1, being realized by the intermittent heating, is i.e. heating a period of time, stops heating
For a period of time, to reduce the thermal losses that IGBT is generated in low-power heating, but this heating method discontinuously makes because heating
Poor user experience；2. lose wave mode using silicon-controlled, by control it is silicon-controlled open shutdown will continuous a cycle originally
Waveform lose half period, but this mode needs to be arranged zero cross detection circuit and carries out zero passage detection, and in each waveform
Period will control silicon-controlled carry out on-off action, and the relatively high and stable property of circuit cost is bad.
Thus, it is necessory to provide a kind of technical solution, to overcome the problems of the above-mentioned prior art.
Summary of the invention
Technical problem to be solved by the present invention lies in overcome the deficiencies in the prior art, and provide a kind of electromagnetic heater
Poewr control method and power control circuit, can realize small-power laser heating, and IGBT loss is small, circuit simply may be used
It leans on, stability is good.
In order to achieve the above object, technical scheme is as follows:
A kind of power control circuit of electromagnetic heater, including rectification module, control module and power tube and resonance
Module, the rectification module include rectifier bridge, and the rectifier bridge has first port and second port, wherein the power control
Circuit processed further includes the switch being connected with rectifier bridge, and the switch is under the control of the control module in first port and second
Switch between port, so that rectifier bridge output current waveform in full-wave rectifier or half wave rectification wave, the control module drive function
Rate pipe is worked with controlling resonance modules under current waveform in full-wave rectifier or half wave rectification wave, to export different heating powers.
Technical solution as a further improvement of that present invention, the switch are single-pole double-throw relay.
Technical solution as a further improvement of that present invention, there are two ac input end and two direct currents for the rectifier bridge tool
Output end, the first port are one of two DC output ends, and the second port is one of two ac input ends.
Technical solution as a further improvement of that present invention, the control module are MCU, and the MCU has switch driving
Port, power tube driving port, voltage sample port and current sample port, the MCU are opened by switch driving port driving
After concern changes preset time, by power tube drive port, voltage sample port and current sample port carry out power tube driving,
Voltage sample and current sample.
In order to achieve the above object, following technical solution also can be used in the present invention:
A kind of Poewr control method of the power control circuit based on above-mentioned electromagnetic heater, including, judge that electromagnetism adds
Whether the heating power of hot program is greater than preset value, when heating power is greater than preset value, switch connection rectifier bridge first port,
Rectifier bridge exports current waveform in full-wave rectifier, and power tube drives electromagnetic coil to be greater than the heating power of preset value and heat；When heating function
When rate is less than preset value, switch connection rectifier bridge second port, rectifier bridge export half wave rectification wave, and power tube drives electromagnetic wire
Circle is heated with the heating power for being less than preset value.The technical program is by setting switch, so that the waveform of rectifier bridge output can be with
For current waveform in full-wave rectifier or half wave rectification wave, thus realize high-power heating and the switching of low-power heating, mistake that no setting is required
Zero detection circuit detect zero crossing, without in each wave period control switch on-off realization lose wave.Pass through hardware circuit
It realizes, circuit is simple and reliable, stability is good.
Technical solution as a further improvement of that present invention, heating power are being greater than preset value and are cutting less than between preset value
The process changed includes being first turned off power tube driving electromagnetic coil, then switch is switched between the first port and the second port.First
Switch-off power pipe, then switch switch, avoidable switch switches in electrification and increasing circuit is lost or generates to circuit
Damage.
Technical solution as a further improvement of that present invention, heating power are being greater than preset value and are cutting less than between preset value
The process changed further includes inspection pot step, and the inspection pot step carries out under current waveform in full-wave rectifier.Handoff procedure includes inspection pot step,
To ensure the presence of cookware；Inspection pot step carries out under current waveform in full-wave rectifier, and inspection pot efficiency and accuracy can be improved, avoid
The erroneous judgement that cookware is not present is spun out or made to the inspection pot time that generates without the wave stage because examining not cookware under half wave rectification wave.
Technical solution as a further improvement of that present invention first connects switch when judging that heating power is less than preset value
Logical rectifier bridge first port, concurrent inspection pot signal, when detect cookware there are after, then by switch connection rectifier bridge second end
Mouth, rectifier bridge export half wave rectification wave.It is switched to before half wave rectification wave, is first switched under current waveform in full-wave rectifier, carry out
Pot is examined, to improve inspection pot efficiency and accuracy.
Technical solution as a further improvement of that present invention, after switch connection rectifier bridge first port, delay first when
Between be spaced, retransmit inspection pot signal.Be delayed first time interval, guarantees that switch has connected and rearward, then can carry out inspection pot, guarantees electricity
The stability on road.
Technical solution as a further improvement of that present invention, the first time interval are 100ms-500ms.Time interval
Setting within the above range, it is ensured that relay switch stablize be attracted, and interval time will not it is too long and generate pause sense, protect
Demonstrate,prove user experience.
The Poewr control method and circuit of electromagnetic heater provided by the invention are switched by setting, so that rectifier bridge
The waveform of output can be current waveform in full-wave rectifier or half wave rectification wave, to realize cutting for high-power heating and low-power heating
Change, no setting is required zero cross detection circuit detects zero crossing, without in each wave period the realization of control switch on-off lose wave.
It is realized by hardware circuit, circuit is simple and reliable, stability is good.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to needed for embodiment
Attached drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention,
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Other attached drawings.
Fig. 1 is the flow diagram of the Poewr control method of electromagnetic heater of the present invention.
Fig. 2 is the flow diagram of power switching in the Poewr control method of electromagnetic heater of the present invention.
Fig. 3 is the flow diagram of startup power in the Poewr control method of electromagnetic heater of the present invention.
Fig. 4 is the module diagram of the power control circuit of electromagnetic heater of the present invention.
Fig. 5 is the circuit diagram of the power control circuit of electromagnetic heater of the present invention.
Fig. 6 is two kinds of waveform diagrams of rectifier bridge output in the power control circuit of electromagnetic heater of the present invention.
Appended drawing reference:
1- control module；2- rectification module；3- power tube；4- resonance modules；5- switch.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It please refers to Fig.1 to Fig.3, the present invention provides a kind of Poewr control method of electromagnetic heater, the power control
Method includes the following steps: 101, judges whether the heating power of electromagnetic heating program is greater than preset value；110, work as heating power
When greater than preset value, then switch connection rectifier bridge first port, rectifier bridge export current waveform in full-wave rectifier；111, power tube driving electricity
Magnetic coil is heated with the heating power for being greater than preset value；120, when heating power is less than preset value, then switch connection rectifier bridge
Second port, rectifier bridge export half wave rectification wave；121, power tube driving electromagnetic coil is with the heating power less than preset value
Heating.For the technical program by setting switch, the waveform that rectifier bridge is exported is current waveform in full-wave rectifier or halfwave rectifier
Waveform, to realize high-power heating and the switching of low-power heating, no setting is required zero cross detection circuit detects zero crossing, also without
The realization of control switch on-off wave need to be lost in each wave period.It is realized by hardware circuit, circuit is simple and reliable, stability
It is good.Electromagnetic heating program described herein refers to by user's triggering, by the program of electromagnetic heater execution, can be electromagnetism
Program built in heating device is also possible to the program that user manually adjusts；By taking electromagnetic oven as an example, such as there is quick-fried on electromagnetic oven
Key, chafing dish key etc., there are also the power keys of regulation power size, and when user presses quick-fried, electromagnetic oven executes quick-fried program at this time,
With the heating power built in one, electromagnetic heater judges whether the heating power is greater than preset value, and according to the above process
Execute heating；When user passes through power key regulation power, electromagnetic heater judges whether the heating power after the adjusting is big
In preset value, and heating is executed according to the above process.
Please emphasis be greater than preset value referring to Fig.2, determining heating power and when less than switching between preset value, be first turned off
Power tube drives electromagnetic coil, then switch is switched between the first port and the second port.It is first turned off power tube, then is switched out
It closes, avoidable switch switches in electrification and increasing circuit is lost or generates damage to circuit.Specifically, including as follows
Step: 201, judging whether heating power is being greater than preset value and is switching less than between preset value, when heating power is pre- by being greater than
If value is switched to less than preset value, 210, switch-off power pipe driving electromagnetic coil switch still turn on first port at this time,
211, inspection pot pulse is first sent, in the presence of judge cookware, 212, switch by first port is switched to second port again, rectification
Bridge export half wave rectification wave, 213, power tube driving electromagnetic wire coil be less than preset value heating power heat；When heating function
When rate is switched to by being less than preset value greater than preset value, 220, switch-off power pipe driving electromagnetic coil still connect due to switching at this time
Lead in second port, rectifier bridge output at this time is half wave rectification wave, is discontinuous waveform, pot meeting is examined under this waveform
So that the erroneous judgement that cookware is not present is spun out or made to the inspection pot time, therefore, first carries out step 221, will switch by second port
It is switched to first port, rectifier bridge exports current waveform in full-wave rectifier, and 222, retransmit inspection pot pulse, in the presence of judging cookware,
223, power tube driving electromagnetic coil is heated with the heating power for being greater than preset value.
Please emphasis refering to Fig. 3, be the heating power less than preset value when heating power is by inactivity starting, specifically include
Following steps: 301, when heating power be by inactivity starting for less than preset value heating power when, 302, switch first connect
First port, rectifier bridge export current waveform in full-wave rectifier, 303, send inspection pot pulse, 304, switch by first port be switched to second
Port, rectifier bridge export half wave rectification wave, 305, power tube driving electromagnetic coil be less than preset value heating power heat.
That is, not exporting half wave rectification wave directly when being small-power by inactivity starting, being heated, but first export all-wave
Rectified waveform first carries out inspection pot under current waveform in full-wave rectifier, in the presence of inspection is to cookware, then is switched to output halfwave rectifier wave
Shape realizes low-power heating.The preset value is 800 watts -1000 watts, such as 900 watts, at 900 watts or more, control rectifier bridge is defeated
Current waveform in full-wave rectifier out, at 900 watts hereinafter, control rectifier bridge exports half wave rectification wave.
Further, after switch connection rectifier bridge first port, be delayed first time interval, retransmits inspection pot signal.
Be delayed first time interval, guarantees that switch has connected and rearward, then can carry out inspection pot, guarantees the stability of circuit.When described first
Between between be divided into 100ms-500ms.Time interval is arranged within the above range, it is ensured that and relay switch, which is stablized, to be attracted, and
Every the time will not it is too long and generate pause sense, guarantee user experience.Preferably 200ms, 300ms, 400ms.Further, exist
After switch is switched to second port by first port, and the first time interval that is first delayed, restart power tube to drive electromagnetism
Coil working.
Fig. 4 and Fig. 5 are please referred to, is the diagram of one embodiment of power control circuit of electromagnetic heater of the present invention.Institute
Stating power control circuit includes rectification module 2, control module 1 and power tube 3 and resonance modules 4, and the rectification module 2 includes
Rectifier bridge, the rectifier bridge have first port and second port, wherein the power control circuit further includes and rectifier bridge phase
Switch 5 even, the switch 5 switches between first port and second port under the control of the control module 1, so that institute
Rectifier bridge output current waveform in full-wave rectifier or half wave rectification wave are stated, the 1 driving power pipe 3 of control module is to control resonance modules
4 work under current waveform in full-wave rectifier or half wave rectification wave, to export different heating powers.
Please emphasis refering to Fig. 5, the rectification module 2 is connected to electric main AC, and rectification module 2 includes rectifier bridge, described
Rectifier bridge is made of four diodes D1, D2, D3, D4, and rectifier bridge has there are two ac input end and two DC output ends,
One of described two ac input ends are connected at the cathode of diode D1 anode and diode D2, another to be connected to two
At the cathode of pole pipe D3 anode and diode D4；One of two DC output ends are connected to the anode of diode D2 and D4
Locate, at another cathode for being connected to diode D1 and D3；The first port of the rectifier bridge is one of two DC output ends, institute
Stating second port is one of two ac input ends.
Please continue to refer to Fig. 5, the switch 5 is in the present embodiment single-pole double-throw relay switch REL, can be rectified
Switch between the first port (port marked as 1 in Fig. 5) and second port (port marked as 2 in Fig. 5) of bridge.Institute
Stating control module 1 is MCU, and there is the MCU switch driving port, power tube driving port, voltage sample port and electric current to adopt
Sample port, power pipe port export PPG signal to control the on-off of power tube IGBT, carry out the electromagnetic wire in control resonance modules
Enclose L2 and resonant capacitance C3 work.After the MCU switches preset time by switch driving port driving switch, then pass through power
Pipe drives port, voltage sample port and current sample port to carry out power tube driving, voltage sample and current sample, and setting is pre-
If after the time is to guarantee the firm actuation of relay switch, then carrying out relevant work, guarantee the reliability of circuit.
In the following, referring to figure 5. and Fig. 6, the power control circuit of electromagnetic heater and worked is introduced in the present embodiment
Journey.When user trigger or adjust heating schedule be it is high-power when, MCU control switch connect first port (in Fig. 5 marked as
1 port), the positive half-wave of electric main AC passes through diode D1, inductance L1, capacitor C2, resistance R3 at this time, through first port
By diode D4, circuit is realized；And the negative sense half-wave of electric main AC is realized back after D3, L1, C2, R3, first port, D2
Road.Waveform after rectifying is as shown in the upper figure in Fig. 6.When the heating schedule that user triggers or adjusts is small-power, MCU control
Switch connection second port (port marked as 2 in Fig. 5) processed, the positive half-wave of electric main AC passes through diode at this time
D1, inductance L1, capacitor C2, resistance R3, realize circuit after second port；And the negative sense half-wave of electric main AC can not be formed back
Road.Negative sense half-wave i.e. after AC rectification is filtered, and waveform is as shown in the following figure in Fig. 6, i.e., in the identical feelings of other conditions
Under condition, the power under half wave rectification wave is the half of the power under current waveform in full-wave rectifier, and small-power so may be implemented
Laser heating.
It can be electromagnetic oven, electromagnetic heating rice cooker, electricity using the electromagnetic heater of above-mentioned Poewr control method or circuit
Magnetic heating pressure cooker, electromagnetic heating cooking machine, electromagnetic heating soybean milk making machine, electromagnetic heating cooking machine, electromagnetic heating juice extractor etc..
As can be seen from the above description, the Poewr control method and circuit of electromagnetic heater provided by the invention, by setting
Switch is set, the waveform that rectifier bridge is exported is current waveform in full-wave rectifier or half wave rectification wave, to realize high-power add
The switching of heat and low-power heating, no setting is required, and zero cross detection circuit detects zero crossing, controls without in each wave period
Wave is lost in switch on and off realization processed.It is realized by hardware circuit, circuit is simple and reliable, stability is good.
Structure shown in specific embodiment description and attached drawing is preferred structure.In the description of the present invention, it is to be understood that
It is term " center ", " transverse direction ", " thickness ", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outside", " diameter
To ", the orientation or positional relationship of the instructions such as " circumferential direction " be to be based on the orientation or positional relationship shown in the drawings, be merely for convenience of retouching
It states the present invention and simplifies description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific
Orientation construction and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be direct phase
Even, can also indirectly connected through an intermediary, the interaction that can be connection or two elements inside two elements is closed
System.For the ordinary skill in the art, above-mentioned term in the present invention specific can be understood as the case may be
Meaning.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those familiar with the art, all answers
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (10)
1. a kind of power control circuit of electromagnetic heater, including rectification module, control module and power tube and resonant mode
Block, the rectification module include rectifier bridge, and the rectifier bridge has first port and second port, which is characterized in that the function
Rate control circuit further includes the switch being connected with rectifier bridge, the switch under the control of the control module in first port and
Switch between second port, so that rectifier bridge output current waveform in full-wave rectifier or half wave rectification wave, the control module are driven
Dynamic power tube is worked with controlling resonance modules under current waveform in full-wave rectifier or half wave rectification wave, to export different heating function
Rate.
2. the power control circuit of electromagnetic heater as described in claim 1, which is characterized in that the switch is that hilted broadsword is double
Throw relay.
3. the power control circuit of electromagnetic heater as claimed in claim 2, which is characterized in that the rectifier bridge has two
A ac input end and two DC output ends, the first port are one of two DC output ends, and the second port is
One of two ac input ends.
4. the power control circuit of electromagnetic heater as described in claim 1, which is characterized in that the control module is
MCU, the MCU have switch driving port, power tube driving port, voltage sample port and current sample port, the MCU
After switching preset time by switch driving port driving switch, port, voltage sample port and electric current are driven by power tube
Sample port carries out power tube driving, voltage sample and current sample.
5. a kind of according to claim 1 to the Poewr control method of any power control circuit in 4, which is characterized in that
Judge whether the heating power of electromagnetic heating program is greater than preset value, when heating power is greater than preset value, switch connection rectification
Bridge first port, rectifier bridge export current waveform in full-wave rectifier, and power tube drives electromagnetic coil to add with the heating power for being greater than preset value
Heat；When heating power is less than preset value, switch connection rectifier bridge second port, rectifier bridge export half wave rectification wave, power
Pipe drives electromagnetic coil to be less than the heating power of preset value and heat.
6. Poewr control method as claimed in claim 5, which is characterized in that heating power is being greater than preset value and is being less than default
The process switched between value include be first turned off power tube driving electromagnetic coil, then will switch first port and second port it
Between switch.
7. Poewr control method as claimed in claim 6, which is characterized in that heating power is being greater than preset value and is being less than default
The process switched between value further includes inspection pot step, and the inspection pot step carries out under current waveform in full-wave rectifier.
8. Poewr control method as claimed in claim 5, which is characterized in that when judging that heating power is less than preset value, first
By switch connection rectifier bridge first port, concurrent inspection pot signal, when detect cookware there are after, then by switch connection rectifier bridge
Second port, rectifier bridge export half wave rectification wave.
9. Poewr control method as claimed in claim 8, which is characterized in that after switch connection rectifier bridge first port, prolong
When first time interval, retransmit inspection pot signal.
10. Poewr control method as claimed in claim 9, which is characterized in that the first time interval is 100ms-
500ms。
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| CN201810728193.0A CN108966397A (en) | 2018-07-05 | 2018-07-05 | The power control circuit and Poewr control method of electromagnetic heater |
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| CN201810728193.0A CN108966397A (en) | 2018-07-05 | 2018-07-05 | The power control circuit and Poewr control method of electromagnetic heater |
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| CN111404134A (en) * | 2020-03-12 | 2020-07-10 | 九阳股份有限公司 | Safety control circuit for electromagnetic cooking appliance and electromagnetic cooking appliance |
| CN111432512A (en) * | 2020-04-16 | 2020-07-17 | 深圳市鑫汇科股份有限公司 | Electromagnetic heating equipment and heating control device and method thereof |
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| CN109905932A (en) * | 2019-03-12 | 2019-06-18 | 九阳股份有限公司 | A kind of Poewr control method of electromagnetic heater |
| CN110567007A (en) * | 2019-09-17 | 2019-12-13 | 珠海格力电器股份有限公司 | Half-bridge induction cooker pot detection method and device and half-bridge induction cooker |
| CN110567007B (en) * | 2019-09-17 | 2020-06-05 | 珠海格力电器股份有限公司 | Half-bridge induction cooker pot detection method and device and half-bridge induction cooker |
| CN112839398A (en) * | 2019-11-25 | 2021-05-25 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating device and dry burning detection method thereof |
| CN111404134A (en) * | 2020-03-12 | 2020-07-10 | 九阳股份有限公司 | Safety control circuit for electromagnetic cooking appliance and electromagnetic cooking appliance |
| CN111432512A (en) * | 2020-04-16 | 2020-07-17 | 深圳市鑫汇科股份有限公司 | Electromagnetic heating equipment and heating control device and method thereof |
| 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 |
| CN112512150A (en) * | 2020-11-23 | 2021-03-16 | 广东瑞德智能科技股份有限公司 | Control method for electromagnetic induction heating power control device |
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