CN108633117A - Detection is by the circuit of heating device and electromagnetic heating apparatus and household electrical appliance - Google Patents
Detection is by the circuit of heating device and electromagnetic heating apparatus and household electrical appliance Download PDFInfo
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- CN108633117A CN108633117A CN201710177767.5A CN201710177767A CN108633117A CN 108633117 A CN108633117 A CN 108633117A CN 201710177767 A CN201710177767 A CN 201710177767A CN 108633117 A CN108633117 A CN 108633117A
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- circuit
- detection
- heating device
- voltage
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/06—Control, e.g. of temperature, of power
-
- 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
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/12—Cooking devices
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Induction Heating (AREA)
Abstract
The present invention relates to magnetic technical field of heating is added, a kind of detection is provided by the circuit of heating device, which is used for electromagnetic heating apparatus, which includes heater circuit and filter circuit, and the heater circuit and filter circuit form loop, including：Current detection circuit, for detecting the electric current in the loop；Resonance potential processing circuit is connected to the output end of the heater circuit, for generating certain branch pressure voltage VAD1 according to the voltage of the heater circuit；Loop current processing circuit is connected with the current detection circuit, the loop current for handling the current detection circuit detection, and output voltage VAD2；And processor, for converting the voltage VAD2 and the voltage VAD1 to digital signal, and the voltage VAD2 and the voltage VAD1 are compared, when VAD1 is more than predetermined times of VAD2, without by heating device in decision circuitry.Meanwhile the present invention also provides the electromagnetic heating apparatus and household electrical appliance of application foregoing circuit.
Description
Technical field
The present invention relates to electromagnetic heating technique fields, and in particular, to a kind of to detect by the circuit of heating device and answer
With the electromagnetic heating apparatus and household electrical appliance of the circuit.
Background technology
The principle of electromagnetic heating is to generate alternating magnetic field by electronic circuit board component part, placed when with containing container made of iron
When above, vessel surface is to cut alternate magnetic force line and generate the electric current (being vortexed) of alternation, whirlpool in container bottom metal part
Stream makes the iron atom high speed random motion of container bottom, atom collide with each other, rub and generate thermal energy.To play heating object
The effect of product.Because being iron ware self-heating, heat conversion is especially high, can reach 95%.Current electromagnetism
Stove, electromagnetic stove are all the electromagnetic heating techniques used.The technology relative to traditional ohmic heating technology have service life it is long,
Securely and reliably, the advantages that energy-efficient, accurate temperature control, good insulating.
Since electromagnetic heating apparatus itself is equivalent to a transformer, when using electromagnetic heating apparatus, added when not
Thermal or when being removed by heating device, is equivalent to transformer and has lacked secondary coil, do not load, it may occur however that short circuit,
And then because coil overheats, electromagnetic heating apparatus may be caused to burn, it is therefore desirable to whether have by heating device in detection circuit
Function.
And existing electromagnetic heating technique, such as electromagnetic oven, when in very low power, such as when 100-300W, due to work(
Rate is smaller, and when drum zero load, power also can reach 300W, and can exist can not sentence the phenomenon that cookware whether there is, thus need
One kind can accurately judge that cookware whether there is circuit, to protect electromagnetic oven not burnt in use because of zero load,
Extend its service life.
Invention content
The object of the present invention is to provide a kind of detections by the circuit of heating device, which can accurately and in time judge quilt
Heating device whether there is, and not limited by the operating power of the electromagnetic heating apparatus using the circuit, so as to close in time
Heating function is closed, plays the role of protecting electromagnetic heating apparatus.
Other two aspect of the present invention is each provided using the detection by the electromagnetic heating of the circuit of heating device
Equipment and household electrical appliance, the electromagnetic heating apparatus and household electrical appliance can be whether there is by accurate judgement by heating device, in time
Close heating function, to have outstanding self-protection function, extend its service life, and improve the equipment and/or
The security performance of household electrical appliance.
To achieve the goals above, the present invention provide it is a kind of detection by the circuit of heating device, which adds for electromagnetism
Hot equipment, the electromagnetic heating apparatus include heater circuit and filter circuit, and the heater circuit and filter circuit form loop, the electricity
Road includes：Current detection circuit, for detecting the electric current in the loop；Resonance potential processing circuit is connected to the heating
The output end of circuit, for generating certain branch pressure voltage VAD1 according to the voltage of the heater circuit；Loop current processing electricity
Road is connected with the current detection circuit, the loop current for handling the current detection circuit detection, and output voltage
VAD2；And processor, for being compared to the voltage VAD2 and the voltage VAD1, when VAD1 is predetermined more than VAD2
Times when, without by heating device in decision circuitry.
Wherein, the detection, which whether there is in the circuit judges circuit of heating device by the principle of heating device, is：When
When the detection is by the circuit of heating device not by heating device, the electric current in integrated circuit is mainly consumed in coil panel
On, thus loop current (i.e. the low frequency part electric current of integrated circuit) very little, thus the voltage of loop current processing circuit output
VAD2 also very littles；Simultaneously as heater circuit internal capacitance inductance charge and discharge nowhere consume when unloaded, therefore heater circuit is defeated
Go out that voltage is very big, the branch pressure voltage VAD1 exported after resonance potential processing circuit voltage division processing is also corresponding very big；And work as
When being had by heating device in the circuit of heating device, the value of the voltage VAD1 and VAD2 is close for the detection, therefore can be with
It sets when the voltage VAD1 is more than predetermined times of the voltage VAD2, is not present by heating device in decision circuit, thus
Heater circuit is closed in time.Watt level is not limited the detection process in by circuit, even if under electromagnetism low power state,
When such as less than 300W, the preparatory of detection is nor affected on.
Preferably, the loop current processing circuit includes：Operational amplifier；Resistance R65 is connected to the operation amplifier
Between the inverting input and output end of device；Resistance R67 is connected to the in-phase input end of the operational amplifier and ground connection；Electricity
Resistance R1046 is connected between the output end of the operational amplifier and the output end of the loop current processing circuit.
Preferably, the loop current processing circuit further includes：Resistance R1047 and capacitance EC09, resistance R1047 and should
Capacitance EC09 is mutually in parallel, and is connected to the output end of the loop current processing circuit and ground connection.
Preferably, the resonance potential processing circuit includes：Divider resistance R1043 is connected to the defeated of the heater circuit
Between outlet and the output end of the resonance potential processing circuit.
Preferably, the resonance potential processing circuit includes：Filter capacitor EC098 and resistance R1037, capacitance EC098
It is connected to output end and the ground connection of the resonance potential processing circuit mutually and after connecting with resistance R1037.
Preferably, the current detection circuit includes current transformer.
Preferably, the current detection circuit includes constantan wire.
Preferably, the current detection circuit includes resistance device and amplifying circuit, and the amplifying circuit is used for passing through
The electric current of resistance device is amplified processing.
Through the above technical solutions, detection heater circuit in resonance potential and loop in loop current, and to its into
Compared after row processing, so as to timely and accurately detect the detection by the circuit of heating device with the presence or absence of being added
Thermal, and heater circuit is closed in time, it prevents from burning because of circuit zero load, extends the service life of integrated circuit, and i.e.
Make the power in circuit is smaller to nor affect on the preparatory of its detection.
The present invention also provides the detections described in a kind of application by the electromagnetic heating apparatus of the circuit of heating device and family
Electrical appliance.The heater circuit in the electromagnetic heating apparatus and household electrical appliance can be half-bridge or full-bridge circuit, including
Transistor and transistor driver circuit, resonant capacitance and coil panel, wherein the coil panel be connected to transistor midpoint and
Between the midpoint of resonant capacitance, the transistor driver circuit is connected to the processor, for the control according to the processor
Signal processed drives the transistor turns.
By using above-mentioned technical proposal, the service life of the electromagnetic heating apparatus and household electrical appliance can be extended,
The electricity of consumption can be saved again by closing wherein heating function in time simultaneously, and be ensured safe to use.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Description of the drawings
Attached drawing is to be used to provide further understanding of the present invention, an and part for constitution instruction, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 be according to embodiments of the present invention one detection by the structure chart of the circuit of heating device；
Fig. 2 be according to embodiments of the present invention one detection by the overall schematic of the circuit of heating device；
Fig. 3 is the detection according to present example example two by the circuit diagram of the circuit of heating device；
Fig. 4 is the circuit diagram of three heater circuit using full bridge circuit according to an embodiment of the invention.
Reference sign
100：Filter circuit 200：Heater circuit
300：Current detection circuit 400：Resonance potential processing circuit
500：Loop current processing circuit 600：Processor
510：Current detection circuit 610：Microcontroller
Specific implementation mode
The specific implementation mode of the present invention is described in detail below in conjunction with attached drawing.It should be understood that this place is retouched
The specific implementation mode stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
Fig. 1 be according to embodiments of the present invention one detection by the structure chart of the circuit of heating device.As shown in Figure 1, described
Detection includes heater circuit 200 and filter circuit 100 by the circuit of heating device, 100 groups of the heater circuit 200 and filter circuit
At loop；Current detection circuit 300, for detecting the electric current in the loop；Resonance potential processing circuit 400 is connected to institute
The output end LOUT for stating heater circuit 200, for generating certain partial pressure electricity according to the resonance potential in the heater circuit 200
Press VAD1；Loop current processing circuit 500 is connected with the current detection circuit 300, for handling the current detection circuit
The loop current of 300 detections, and output voltage VAD2；And processor 600, for the voltage VAD2 and the voltage
VAD1 is compared, when VAD1 is more than predetermined times of VAD2, without by heating device in decision circuitry.
Fig. 2 be according to embodiments of the present invention one detection by the overall schematic of the circuit of heating device.Fig. 2 is mainly shown
The resonance potential processing circuit 400, loop current processing circuit 500 and current detection circuit 300 and the loop it
Between connection relation.In fig. 2, ACL and ACN is commercial power interface, and BD101 is bridge heap, plays the role of rectification；Choke coil
L101, filter capacitor C101 and C104 form filter circuit 100, and in practical application, filter circuit is not limited to the form.Fig. 2
In heater circuit 200 be half-bridge circuit, including capacitor resonance capacitance C102 and C103；Transistor Q1001 and Q1002, crystal
Pipe Q1001 and Q10012 are the IGBT for forming heater circuit bridge up and down, wherein Q1001 and IGBT driving 1 is connect, Q1002 and
2 connection of IGBT drivings, IGBT drive 1 and IGBT drivings 2 to be connected to microcontroller (MCU) 610, and microprocessor passes through described in control
IGBT drives 1 and IGBT that 2 controlling transistor Q1001 and Q1002 is driven to turn on and off；And coil panel L210, one end connect
It is connected to the midpoint of transistor Q1001 and Q1002, the other end is connected to the midpoint of resonant capacitance C101 and C102.Wherein, microcontroller
Device 610 can also be replaced with other devices with identity function, such as microcontroller, FPGA etc..
As shown in Fig. 2, current detection circuit 300 is connected on the loop of the filter circuit and heater circuit composition
In, for the electric current in detection loop, it should be noted that the link position of current detection circuit 300 is not limited to institute in Fig. 2
The position shown can also connect other positions in the loop, as long as electric current that can be in detection loop.In order to electric current
The loop circuit of detection circuit detection is handled, and can also include loop current processing circuit 500, and one end is connected to described
Current detection circuit 300, the other end are connected to microcontroller 610, for generating output after handling the loop current
Voltage VAD2.In order to detect the resonance potential generated in the heater circuit 200, the coil panel is connected to resonant capacitance
Output end of the one end at the midpoints C101 and C103 as heater circuit 200, resonance potential processing circuit 400 are connected to the heating
The output end of circuit, the other end are connected to microcontroller, and voltage division processing is carried out for the output voltage to the heater circuit,
Generation branch pressure voltage VAD1 after voltage division processing.
Both microcontroller voltage VAD1 described further and voltage VAD2 are compared, when VAD1 is pre- more than VAD2
When determining multiple, it can determine that as without by heating device.Its judge principle in the above content it has been described that, not according to circuit design
Together, prearranged multiples of the VAD1 more than VAD2 also can be different.
Fig. 3 is the detection according to present example example two by the circuit diagram of the circuit of heating device.Implementation shown in Fig. 3
In the circuit diagram of example two, the connection of power connection part, filter circuit 100, heater circuit 200 and each chief component is closed
System is identical as embodiment one shown in Fig. 2, no longer superfluous herein to chat.
As shown in figure 3, resonance potential processing circuit 400 may include divider resistance R1043 and R1036, the partial pressure electricity
One end is connected to the output end of the heater circuit after resistance R1043 and R1036 parallel connections, and the other end connects the resonance potential processing
The output end of the output end of circuit, the resonance potential processing circuit is connected to processor.The resonance potential processing circuit is also
May include：Filter capacitor EC098 and resistance R1037, capacitance EC098 and resistance R1037 mutually and after be connected to repeatedly it is described
The output end of resonance potential processing circuit and ground connection.Because the resonance potential in heater circuit 200 is possible to very big, there are one
It in the case of divider resistance, is also possible to by the branch pressure voltage VAD1 values of voltage division processing excessive, is unfavorable for handling, therefore can be
Two or more resistance in parallel in resonance potential processing circuit, in embodiment two shown in Fig. 2, in addition to the divider resistance
R1043 and R1036, in the output end of resonance potential processing circuit resistance R1041 also in parallel.
As shown in figure 3, the loop current processing circuit may include：Operational amplifier, because loop current may be too small,
It is unfavorable for subsequent processing, it is therefore desirable to enhanced processing is made to loop current using operational amplifier or other enhanced processing devices,
That selected in Fig. 3 is amplifier chip LM358, and any amplifier chip or any device for including enlarging function can be selected in practical application
Part replaces, and-IN1 ,+IN2, the OUT1 in figure are the anti-phase input of the one of which operational amplifier of amplifier chip LM358 respectively
End, normal phase input end and the corresponding chip pin of output end；Resistance R65 is connected to the anti-phase input of the operational amplifier
Between end and output end；Resistance R67 is connected to the in-phase input end of the operational amplifier and ground connection；Resistance R1046 is series at
Between the output end of the operational amplifier and the output end of the loop current processing circuit.The loop current processing circuit
Can also include：Resistance R1047 and capacitance EC09, resistance R1047 and capacitance EC09 are mutually in parallel, and are connected to the loop
The voltage of the output ends of current processing circuits and ground connection, the output end of the loop current processing circuit 500 is VAD2.
As shown in figure 3, the current detection circuit described in embodiment two may include constantan wire.The loop current processing
The voltage V0 of loop current detection circuit shown in input voltage, that is, Fig. 3 of circuit 500, understandable is voltage V0 by ring
The resistance value of road electric current and loop current detection circuit 300 determines.
The current detection circuit can also include resistance device and amplifying circuit, and the amplifying circuit is used for by electricity
The electric current of resistance device is amplified processing, when selecting conventional, electric-resistance to replace constantan wire, since the resistance of selection is possible to
It is smaller, along with the loop current that detects may very little, therefore its voltage V0 also can be unfavorable for subsequent processing due to too small, because
Amplifying circuit can be arranged in loop current detection circuit in this, and carrying out level-one to the voltage of loop current or loop detection circuit puts
It is handled again by loop current processing circuit after big.
Current detection circuit described in practice can also include current transformer, due to current transformer can generate compared with
Big electric current, thus using current transformer when do not need additional amplifying circuit and can meet subsequent processing needs.
In embodiment two, it is assumed that the voltage of the output end LOUT of heater circuit as shown in Figure 3 is VLOUT, loop electricity
The output voltage of current detection circuit is V0, and the resonant frequency in circuit is f, then the output end of resonance potential processing circuit 400
The calculation formula of voltage, i.e., the branch pressure voltage VAD1 after voltage division processing is：
The calculation formula of the output voltage VAD2 of loop current processing circuit 500 is：
As it is above-mentioned described in content shown in, when voltage VAD1 is more than predetermined times of voltage VAD2, processor judges line
Putting by heating device on circle disk, because of actually setting for resonance potential processing circuit 400 and loop current processing circuit 500
Set difference, the actual size of voltage VAD1 and voltage VAD2 also can be different, and the voltage VAD1 is more than predetermined times of voltage VAD2
Number can be set according to actual needs, and the reference value of the prearranged multiple provided by the invention is 5-10 times.When in heater circuit
When not placing by heating device, or when being removed by heating device, there are one become for the induced current meeting in heater circuit
Big process, therefore for circuit of the detection by heating device, the prearranged multiple can also be according to reality
It needs selection to set, setting one can be selected to can guarantee that heater circuit turns off in time, be also avoided that heater circuit is burned out
Multiple set.
The detection of foregoing description can be applied to by the circuit of heating device in electromagnetic heating apparatus and household electrical appliance, such as
Electromagnetic oven.What the heater circuit in above-described embodiment one and embodiment two used is all half-bridge circuit, but when practical application, above-mentioned
Technical solution is also applied for the heater circuit using full-bridge circuit.As shown in figure 4, being the connection that heater circuit uses full-bridge circuit
Schematic diagram, the other parts omitted in figure are identical as the embodiment one and embodiment that foregoing description is crossed.In full bridge circuit, with
Half bridge circuit is compared, and is increased and above-mentioned half bridge circuit symmetrical transistor Q1003, Q1004 and corresponding
IGBT drivings 3, IGBT drivings 4 and resonant capacitance C202, C203.
The preferred embodiment of the present invention is described in detail above in association with attached drawing, still, the present invention is not limited to above-mentioned realities
The detail in mode is applied, within the scope of the technical concept of the present invention, a variety of letters can be carried out to technical scheme of the present invention
Monotropic type, these simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (11)
1. a kind of detection, by the circuit of heating device, which is used for electromagnetic heating apparatus, which includes heating
Circuit and filter circuit, the heater circuit and filter circuit form loop, which is characterized in that the circuit includes：
Current detection circuit, for detecting the electric current in the loop；
Resonance potential processing circuit is connected to the output end of the heater circuit, for the output end according to the heater circuit
Voltage generate certain branch pressure voltage VAD1；
Loop current processing circuit is connected with the current detection circuit, the ring for handling the current detection circuit detection
Road electric current, and output voltage VAD2；
Processor, for being compared to the voltage VAD2 and the voltage VAD1, when VAD1 is more than predetermined times of VAD2,
Without by heating device in decision circuitry.
2. being detected according to claim 1 by the circuit of heating device, which is characterized in that the loop current processing circuit packet
It includes：
Operational amplifier；
Resistance R65 is connected between the inverting input and output end of the operational amplifier；
Resistance R67 is connected to the in-phase input end of the operational amplifier and ground connection；
Resistance R1046 is connected between the output end of the operational amplifier and the output end of the loop current processing circuit.
3. being detected according to claim 2 by the circuit of heating device, which is characterized in that the loop current processing circuit is also
Including：Resistance R1047 and capacitance EC09, resistance R1047 and capacitance EC09 are mutually in parallel, and are connected at the loop current
Manage the output end of circuit and ground connection.
4. detection according to claim 1 is by the circuit of heating device, which is characterized in that the resonance potential processing circuit
Including：Divider resistance R1043, be connected to the heater circuit output end and the resonance potential processing circuit output end it
Between.
5. detection according to claim 4 is by the circuit of heating device, which is characterized in that the resonance potential processing circuit
Including：Filter capacitor EC098 and resistance R1037, capacitance EC098 and resistance R1037 are connected to the resonance after being mutually in parallel
The output end of voltage processing circuitry and ground connection.
6. detection according to any one of claims 1-5 is by the circuit of heating device, which is characterized in that the electric current inspection
Slowdown monitoring circuit includes current transformer.
7. detection according to any one of claims 1-5 is by the circuit of heating device, which is characterized in that the electric current inspection
Slowdown monitoring circuit includes constantan wire.
8. detection according to any one of claims 1-5 is by the circuit of heating device, which is characterized in that the electric current inspection
Slowdown monitoring circuit includes resistance device and amplifying circuit, and the amplifying circuit is used for being amplified place by the electric current of resistance device
Reason.
9. a kind of electromagnetic heating apparatus, which is characterized in that the electromagnetic heating apparatus includes described in any one of claim 1-8
Detection is by the circuit of heating device.
10. electromagnetic heating apparatus according to claim 9, which is characterized in that the heater circuit is half-bridge or full-bridge electricity
Road, including transistor and transistor driver circuit, resonant capacitance and coil panel, wherein the coil panel is connected to transistor
Midpoint and the midpoint of resonant capacitance between, the transistor driver circuit is connected to the processor, for according to the place
The control signal for managing device drives the transistor turns.
11. a kind of household electrical appliance, which is characterized in that the household electrical appliance include the detection quilt described in any one of claim 1-8
The circuit of heating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710177767.5A CN108633117A (en) | 2017-03-23 | 2017-03-23 | Detection is by the circuit of heating device and electromagnetic heating apparatus and household electrical appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710177767.5A CN108633117A (en) | 2017-03-23 | 2017-03-23 | Detection is by the circuit of heating device and electromagnetic heating apparatus and household electrical appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108633117A true CN108633117A (en) | 2018-10-09 |
Family
ID=63707316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710177767.5A Pending CN108633117A (en) | 2017-03-23 | 2017-03-23 | Detection is by the circuit of heating device and electromagnetic heating apparatus and household electrical appliance |
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| CN (1) | CN108633117A (en) |
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| CN103607798A (en) * | 2013-11-15 | 2014-02-26 | 美的集团股份有限公司 | A detection method for types of cookers and an electromagnetic heating apparatus |
| CN104604330A (en) * | 2012-10-25 | 2015-05-06 | 松下知识产权经营株式会社 | Induction heating device |
| CN105103652A (en) * | 2012-12-11 | 2015-11-25 | 阿塞里克股份有限公司 | An induction heating cooktop |
| CN205593011U (en) * | 2016-04-19 | 2016-09-21 | 广东美的厨房电器制造有限公司 | Electromagnetic oven |
| CN206542589U (en) * | 2017-03-23 | 2017-10-03 | 佛山市顺德区美的电热电器制造有限公司 | Detection is by the circuit and electromagnetic heating apparatus and household electrical appliance of heater |
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2017
- 2017-03-23 CN CN201710177767.5A patent/CN108633117A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102428750A (en) * | 2009-05-26 | 2012-04-25 | 三菱电机株式会社 | Induction cooking device and induction heating method |
| CN101953626A (en) * | 2009-07-14 | 2011-01-26 | 松下电器产业株式会社 | Rice cooker |
| CN104604330A (en) * | 2012-10-25 | 2015-05-06 | 松下知识产权经营株式会社 | Induction heating device |
| CN105103652A (en) * | 2012-12-11 | 2015-11-25 | 阿塞里克股份有限公司 | An induction heating cooktop |
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| CN205593011U (en) * | 2016-04-19 | 2016-09-21 | 广东美的厨房电器制造有限公司 | Electromagnetic oven |
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