CN201438767U - Electromagnetic induction heating device - Google Patents
Electromagnetic induction heating device Download PDFInfo
- Publication number
- CN201438767U CN201438767U CN2009200544908U CN200920054490U CN201438767U CN 201438767 U CN201438767 U CN 201438767U CN 2009200544908 U CN2009200544908 U CN 2009200544908U CN 200920054490 U CN200920054490 U CN 200920054490U CN 201438767 U CN201438767 U CN 201438767U
- Authority
- CN
- China
- Prior art keywords
- coil
- coil unit
- electromagnetic induction
- groups
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Abstract
The utility model provides an electromagnetic induction heating device, which has the advantages that the sensing eddy current generated on the bottom thereof is more even, thereby improving the heating uniformity of the heating device and improving the thermal efficiency, the adaptability to different pots is high, the IGBT can not be easily damaged, thereby enhancing the reliability, and the electromagnetic induction heating device can realize both high-power heating and low-power heating. The electromagnetic induction heating device comprises a shell, a control circuit, a magnetic coil plate, a coil unit bottom plate, a micro crystal plate and an excitation coil plate, wherein the control circuit, the magnetic coil plate, the coil unit bottom plate and the micro crystal plate are arranged in the shell, the coil unit bottom plate is arranged below the coil plate, the micro crystal plate is arranged above the coil plate, the excitation coil plate comprises a disc-shaped coil unit bracket body, a coil component wound on the coil unit bracket body in a spiral way, a connecting terminal connected with the coil and a magnetic device arranged between the coil unit bracket body and the coil, the connecting terminal is electrically connected with the control circuit, the coil component comprises two or more than two groups of coil units which are respectively independent of each other, and the coil units in each group are all provided with a connecting terminal which is electrically connected with the control circuit.
Description
Technical field
The utility model relates to coil panel and the control technology thereof that a kind of electromagnetic induction heating is used, and what be primarily aimed at is the technology of the electromagnetic induction device heating of electromagnetic oven and some other occasions.
Background technology
The electromagnetic induction heater of prior art, for example: the electromagnetic oven operation principle is the low-frequency ac power with 50HZ, the high frequency voltage that changes 20KHZ-40KHZ into directly is added to the excitation coil plate of electromagnetic oven, the big electric current that changes at a high speed produces the large power, electrically magnetic field that changes at a high speed, utilizes electromagnetic field to make pot body produce eddy current again the pot body is directly heated.Excitation coil plate generally be one group of copper cash coil unit support along the line plane in the shape of a spiral the tight coiling of shape form, this class electromagnetic oven generally adopts the mode of insulated gate bipolar power tube IGBT, with low cost, but shortcoming is obvious, as the power frequency because of coil unit and control circuit is about 30KHZ, can only just the higher heat efficiency can be arranged to the irony pan; Cross low and pan generation resonance because of induction frequencies, can produce bigger culinary art noise; The ratio of damaging because of the not enough IGBT of IGBT electric stress surplus remains high.
Therefore, the ubiquitous pan bad adaptability of the electromagnetic induction heater of prior art (only to irony pan heating), low reliability (IGBT damages easily), high-power and small-power heating such as are difficult to take into account at problem, need propose brand-new solution.
Summary of the invention
The purpose of this utility model is to provide a kind of electromagnetic induction heater, not only the inductive loop of its bottom generation is more even, improve the uniformity of heater heating, improve the heat efficiency, strong to pan adaptability simultaneously, IGBT is not easy to damage reliable height, high-power and small-power heating can take into account.
The utility model is achieved through the following technical solutions:
Electromagnetic induction heater includes:
Housing;
Be positioned at control circuit, the excitation coil plate of enclosure interior, the crystallite plate that is positioned at the coil unit base plate of described coil panel below and is positioned at described coil panel top;
Described excitation coil plate includes coil unit rack body, helical form in the form of annular discs and is wound on the coil block on the described coil unit rack body, the binding post that is connected with described coil and the magnetic stripe device between described coil unit rack body and coil; Described binding post and control circuit are electrically connected;
Wherein, described coil block includes two groups or more coil unit, and every group of coil unit all has two binding posts that are electrically connected with control circuit.
Described two groups or more coil unit, adopting up and down, overlapping mode helical form is wound on the described coil unit rack body.
Described two groups or more coil unit, mode helical form staggered about employing is wound on the described coil unit rack body.
To sum up, the beneficial effects of the utility model are:
Electromagnetic induction heater of the present utility model, its magnetic stripe coil panel cooperates the independent respectively control of two above oscillating circuits to realize by two groups or more coil unit, coil is overlapping or is staggered in together that the coil unit support plane along the line tightr coiling of shape in the shape of a spiral forms.Every group of coil is independently, has two terminals separately.
Coil charging and discharging circuit of the present utility model is the loop of independent control more than two, has two above IGBT.Two above coil panels and control principle thereof are as follows:
(in the time of this place description control principle, said two above coil panels above, concrete then principles illustrated be exactly the principle of two groups of coils.)
1. with same frequency, synchronous electric current during by two groups of coils, two groups of overlapping coils will produce same frequency, synchronous magnetic field, two groups of magnetic field superposition together, the magnetic line of force will double, the eddy current of pan generation also will double, the power of heating also will double.Compare with the power that unicoil produces like this, can reach under the situation of same heating power, the electric current that coil and IGBT pass through all can reduce half.Reduce the inefficacy that coil unit, IGBT cause because of the electric stress problem greatly.
Equally, if keep constant with monocoil power and electric current, by this utility model scheme, heating power can be easy to reach multiplication, has the effect of more high-power heating so.
Also can realize simultaneously the wider adjusting of power.For example the unicoil cell power is 400-2000W, can accomplish the adjusting of 400-4000W on the twin coil Element Theory.
2. with the electric current of same frequency, hysteresis half period phase place during by two groups of coils, two groups of overlapping coils will stagger stack together with the magnetic field that produces, frequency can double, unicoil 30KHZ is an example, two groups of coil frequency stacks are 60KHz together, according to the frequency f of induction heating and the relation of pan material, frequency 10-20K can only heat iron pan; 20K-30KHz can heat stainless-steel pan; About 50K, can heat aluminum pot; About 60K, can heat the copper pot; 1Mhz belongs to microwave heating
The principle of 3. many group coil units is identical.
Two groups of overlapping or staggered coils can not only be realized the heating to iron, stainless steel, aluminium, copper pan, and the expansion electromagnetic oven is to the adaptability of pan; The more important thing is, in the mode of raising induction heating frequency, when may improve the heat efficiency of irony, stainless steel pot by a relatively large margin, because of high frequency (40-60KHz) induction heating, also can avoid existing noise (20-30KHz), realize the technique effect of quiet culinary art because of the generation of pan resonance.
Description of drawings
Fig. 1 is the excitation coil plate structure schematic diagram of the utility model electromagnetic induction heater embodiment one;
Fig. 2 is the excitation coil plate Facad structure schematic diagram of the utility model electromagnetic induction heater embodiment one;
Fig. 3 is the user mode schematic diagram of the utility model electromagnetic induction heater embodiment one;
Fig. 4 is the excitation coil plate structural representation of the utility model electromagnetic induction heater embodiment two;
Fig. 5 is the user mode schematic diagram of the utility model electromagnetic induction heater embodiment two;
Fig. 6 is the circuit diagram of the utility model electromagnetic induction heater;
Fig. 7 is the control waveform schematic diagram of the utility model electromagnetic induction heater.
Embodiment
The utility model discloses a kind of electromagnetic induction heater, shown in Fig. 1,2,3,4,5, includes:
Housing;
Be positioned at control circuit, the excitation coil plate of enclosure interior, the crystallite plate 7 that is positioned at the coil unit base plate 8 of described coil panel below and is positioned at described coil panel top;
Described excitation coil plate includes coil unit rack body 1, helical form in the form of annular discs and is wound on the coil block on the described coil unit rack body 1, the binding post that is connected with described coil and the magnetic stripe device 4 between described coil unit rack body 1 and coil; Described binding post and control circuit are electrically connected;
Wherein, described coil block includes two groups or more coil unit, and every group of coil unit all has two binding posts that are electrically connected with control circuit.
Described every group of coil unit all adopts independent driving circuits to drive, and described drive circuit is electrically connected with the binding post of control circuit and every group of coil unit respectively.
Described electromagnetic induction heater is a kind of electromagnetic oven.
Embodiment one:
As shown in Figure 1, 2, 3, described two groups of above coil units, overlapping mode helical form is wound on the described coil unit rack body about adopting, and is combined into two circle double line coil units.
Described two circle double line coil unit includes two groups of helical form copper cash windings 2,3 in overlapping mode, the tight coiling of shape forms in the shape of a spiral from the inside to surface, two groups of helical form copper cash windings 2,3 are respectively drawn two groups of independently binding posts 21,22 and 31,33, two groups of helical form copper cash windings the 2, the 3rd, independently winding has four lead-in wires.
Embodiment two:
Shown in Fig. 4,5, described two groups of above coil units, mode helical form staggered about employing is wound on the described coil unit rack body, is combined into two circle interleaved coils unit.
Described two circle interleaved coils unit includes two groups of helical form copper cash windings 5,6 in staggered mode, and the tight coiling of shape forms in the shape of a spiral from the inside to surface, and two groups of helical form copper cash windings 5,6 are respectively drawn two set of connections terminals 51,52 and 61,62; Two groups of helical form copper cash windings the 5, the 6th, independently winding has four lead-in wires.
As shown in Figure 6, drive circuit implementation:
As shown above: insulated gate bipolar power tube IGBT generally selects the high-power IGBT of Infineon or Fairchild for use, as models such as IHW20N120R2, FGA20N120ANT.
Described control circuit includes the MCU controller, the suitable inductance of coil unit L1, L2, and coil unit L1 and capacitor C 1 constitute the LC oscillating circuit of LC parallel resonance, and described LC oscillating circuit is connected with the C utmost point of insulated gate bipolar power tube IGBT1; Described insulated gate bipolar power tube IGBT1 base stage connects drive circuit, and described drive circuit and MCU controller are electrically connected; The grounded emitter of described insulated gate bipolar power tube IGBT1; Coil unit L2 and capacitor C 3 constitute the LC oscillating circuit of LC parallel resonance, and described LC oscillating circuit is connected with the C utmost point of insulated gate bipolar power tube IGBT2; Described insulated gate bipolar power tube IGBT2 base stage connects drive circuit, and described drive circuit and MCU controller are electrically connected; The grounded emitter of described insulated gate bipolar power tube IGBT2.
Overlapping or the staggered suitable inductance L of coil unit of described staggered two circles, it and C1 or C3 constitute the LC oscillating circuit of LC parallel resonance respectively, mainly utilized the principle of LC parallel resonance to carry out work, the concrete course of work of LC parallel resonance is as follows: when the C of IGBT1/IGBT2 pole tension is 0V, during the IGBT1/IGBT2 conducting, inductance (coil unit) carries out energy storage, when IGBT1/IGBT2 by be conducting to by the time, this moment is because inductance (effect of coil unit), electric current also can flow along previous direction, because IGBT1/IGBT2 turn-offs, inductance (coil unit) can only charge to capacitor C 1/C3, thereby cause the IGBT1/IGBT2C utmost point voltage rise height that powers on, along with charging current diminishes until being 0 o'clock, C pole tension the highest (this value is to choose the direct foundation of selecting the withstand voltage index of IGBT).In the time of from this, capacitor C 1/C3 begins from coil discharge, this moment IGBT1/IGBT2C pole tension step-down, when reaching, by " synchronous circuit " detects (monitoring) to this value, opens IGBT once more, follow also again and begin near 0V; Carry out large current charge/discharge, the magnetic field that generation 20-30KHZ changes at a high speed so inductance (coil unit) and oscillating capacitance do not stop.Shown in Fig. 3,5, the magnetic field 300 of variation acts on the bottom of a pan of magnetic conductivity irony pan 100, the eddy current 200 that changes, and the impedance of pan 100 is very low, produces powerful thermal resistance effect and living fast heat.
Entire circuit operation principle roughly is: see Fig. 6, when " MCU control " is given the IGBT drive signal of a predetermined frequency (as 2000W), drive the IGBT conducting by IGBT " drive circuit ", the main effect of " synchronous circuit " is to guarantee to control the IGBT switch and the MCU control signal is synchronous." synchronous circuit " detects IGBT C voltage, relatively produce a synchronous signal in the back with the reference voltage of comparator, the sawtooth signal of " oscillating circuit " generation standard together together, carry out waveform modification at " power control " circuit, output approaches the control signal of square wave, through " drive circuit " driving IGBT, synchronous conducting when realizing the IGBT no-voltage.
Described control circuit includes voltage and current detection circuit, can detect the alternating voltage size of current of input simultaneously, except preventing that over-voltage and over-current from damaging the circuit, also can obtain current power according to electric current and voltage, this power and predetermined electric power are compared, adjust the frequency of drive signal then, infinitely near predetermined electric power.
Described control circuit includes the protection control circuit, mainly is to detect the specification that the IGBT back-pressure is no more than IGBT.
As shown in Figure 7: the realization of two circle frequencys multiplication and power expansion control technology:
1, the realization that doubles of induction frequencies:
The power frequency that control flows is crossed coil one is 30KHz, frequency to the IGBT1 control waveform also is 30KHz so, the power frequency of control coil two also is 30KHz, the phase lag half period, coil one and two together so, it is the electric current of 60KHz that its effect will be equal to twin coil upper reaches overfrequency, realizes the purpose of frequency multiplication.So just than being easier to reach the frequency multiplication heating purposes.Compare with the 30KHz frequency, 60KHz not only has outside the higher efficiency of heating surface iron pan, also can both realize heating to the copper aluminum pot, and the expansion electromagnetic oven is to the adaptability of pan; And eliminated 30KHz substantially down and the resonance noise of heating pan, can realize quiet culinary art, realized that cost is minimum.
2, the realization of extended power scope:
The power frequency that control flows is crossed coil one is 30KHz, frequency to the IGBT control waveform also is 30KHz so, the power frequency of control coil two also is 30KHz, phase place is identical with coil one, coil one and two together so, it is 30KHz that its effect will be equal to twin coil upper reaches overfrequency, and simultaneously because of the synchronous cause of electric current, electric current and power all will double.Two groups of overlapping/staggered coils will produce same frequency, synchronous magnetic field, two groups of magnetic field superposition together, the magnetic line of force will double, the eddy current of pan generation also will double, the power of heating also will double.Compare with the power that unicoil produces like this, reaching under the situation of same heating power, the electric current by twin coil and IGBT can reduce half.Reduce the inefficacy that coil unit, IGBT cause because of the electric stress problem greatly.
Also can realize simultaneously the wider adjusting of power.For example the unicoil cell power is 400-2000W, can accomplish the adjusting of 400-4000W on the twin coil Element Theory.
3, the frequency multiplication of multi-turn and power expansion technology:
A plurality of coil panels such as three circles, four circles, its control principle and method and two circle are quite. and every with reference to the design of the utility model coil unit and drive controlling thought and method, all in protection range of the present utility model.
The utility model is not limited only to electromagnetic oven, and every electromagnetic induction heating field is all in protection range of the present utility model.
The utility model can be by flexible control coil one and coil two the frequency and the phase place of electric current of induction heating, have following significant advantage:
1. the higher heat efficiency: compare with the electromagnetic oven that present general heating frequency is 20-30KHz, the heat efficiency to iron, stainless steel pan under the 40-60KHz is significantly improved.
2. improve the adaptability of electromagnetic oven to pan: according to frequency doubling technology of the present utility model, except that can heating to iron, stainless steel pan commonly used, also can be to multiple metal pan heating such as aluminium commonly used, copper, the scope of application of having extended pan.
3. reduce the culinary art noise: the electromagnetic oven of conventional 20-30KHz heating, the noise that unavoidably has pan resonance to produce, adopt frequency doubling technology of the present utility model after, can reach the purpose of quiet culinary art.
4. improving IGBT reliability: IGBT damages inadequately because of the electric stress surplus, it is the high main cause of present electromagnetic oven fraction defective, compare with present common single tube IGBT electromagnetic oven, the utility model can be under the equal-wattage situation, the electric current of IGBT, back-pressure etc. all can reduce near half, can improve the reliability of IGBT greatly.
5. power is expanded on a large scale: can realize the wider adjusting of power.For example the unicoil cell power is 400-2000W, and the twin coil unit can be accomplished the adjusting of 400-4000W substantially.Expanded the scope of application of electromagnetic oven greatly.
6. heating surface (area) (HS is bigger, and firepower is evenly distributed: twin coil unit heating area is bigger than unicoil unit, by suitable control, can make heating more even, and firepower is more concentrated.
Above-mentioned listed specific implementation is nonrestrictive, and to one skilled in the art, in not departing from the utility model scope, various improvement and the variation carried out all belong to protection range of the present utility model.
Claims (10)
1. electromagnetic induction heater includes:
Housing;
Be positioned at control circuit, the excitation coil plate of enclosure interior, the crystallite plate (7) that is positioned at the coil unit base plate (8) of described coil panel below and is positioned at described coil panel top;
Described excitation coil plate includes coil unit rack body (1), helical form in the form of annular discs and is wound on coil block, the binding post that is connected with described coil block on the described coil unit rack body (1) and is positioned at magnetic stripe device (4) between described coil unit rack body (1) and the coil block; Described binding post and control circuit are electrically connected;
It is characterized in that: described coil block includes two groups or more coil unit, and every group of coil unit all each has two binding posts that are electrically connected with control circuit.
2. electromagnetic induction heater according to claim 1 is characterized in that: described every group of coil unit, and all adopt independent driving circuits to drive, described drive circuit is electrically connected with the binding post of control circuit and every group of coil unit respectively.
3. electromagnetic induction heater according to claim 2 is characterized in that: described two groups or more coil unit, adopt up and down that overlapping mode helical form is wound on the described coil unit rack body, and be combined into multi-turn double line coil unit.
4. electromagnetic induction heater according to claim 3, it is characterized in that: described multi-turn double line coil unit includes two groups of helical form copper cash windings (2,3) in overlapping mode, the tight coiling of shape forms in the shape of a spiral from the inside to surface, two groups of helical form copper cash windings (2,3) are respectively drawn two groups of independently binding post (21,22) and (31,33), two groups of helical form copper cash windings (2,3) are windings independently, have four lead-in wires.
5. electromagnetic induction heater according to claim 2 is characterized in that: described two groups or more coil unit, mode helical form staggered about employing is wound on the described coil unit rack body, is combined into multi-turn interleaved coil unit.
6. electromagnetic induction heater according to claim 5, it is characterized in that: described multi-turn interleaved coil unit includes two groups of helical form copper cash windings (5,6) in staggered mode, the tight coiling of shape forms in the shape of a spiral from the inside to surface, and two groups of helical form copper cash windings (5,6) are respectively drawn two set of connections terminals (51,52) and (61,62); Two groups of helical form copper cash windings (5,6) are windings independently, have four lead-in wires.
7. according to claim 3 or 6 described electromagnetic induction heaters, it is characterized in that: described control circuit includes the MCU controller, the suitable inductance of coil unit L1, L2, coil unit L1 and capacitor C 1 constitute the LC oscillating circuit of LC parallel resonance, and described LC oscillating circuit is connected with the C utmost point of insulated gate bipolar power tube IGBT1; Described insulated gate bipolar power tube IGBT1 base stage connects drive circuit, and described drive circuit and MCU controller are electrically connected; The grounded emitter of described insulated gate bipolar power tube IGBT1; Coil unit L2 and capacitor C 3 constitute the LC oscillating circuit of LC parallel resonance, and described LC oscillating circuit is connected with the C utmost point of insulated gate bipolar power tube IGBT2; Described insulated gate bipolar power tube IGBT2 base stage connects drive circuit, and described drive circuit and MCU controller are electrically connected; The grounded emitter of described insulated gate bipolar power tube IGBT2.
8. electromagnetic induction heater according to claim 7 is characterized in that: described insulated gate bipolar power tube IGBT is a kind of high-power insulated gate bipolar power tube IGBT.
9. electromagnetic induction heater according to claim 8 is characterized in that: described insulated gate bipolar power tube IGBT is IHW20N120R2, IHW25N120R2, FGA20N120ANT or FGA25N120ANT model.
10. electromagnetic induction heater according to claim 1 is characterized in that: described electromagnetic induction heater is a kind of electromagnetic oven.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200544908U CN201438767U (en) | 2009-04-14 | 2009-04-14 | Electromagnetic induction heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200544908U CN201438767U (en) | 2009-04-14 | 2009-04-14 | Electromagnetic induction heating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201438767U true CN201438767U (en) | 2010-04-14 |
Family
ID=42400737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200544908U Expired - Lifetime CN201438767U (en) | 2009-04-14 | 2009-04-14 | Electromagnetic induction heating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201438767U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108112109A (en) * | 2017-12-26 | 2018-06-01 | 深圳国创名厨商用设备制造有限公司 | A kind of individual layer can change the electromagnetic wire coil of heating surface (area) (HS |
| WO2019119640A1 (en) * | 2017-12-21 | 2019-06-27 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic cooking appliance and power control method thereof |
| CN108112109B (en) * | 2017-12-26 | 2024-04-26 | 深圳国创名厨商用设备制造有限公司 | Single-layer electromagnetic wire coil capable of changing heating area |
-
2009
- 2009-04-14 CN CN2009200544908U patent/CN201438767U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019119640A1 (en) * | 2017-12-21 | 2019-06-27 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic cooking appliance and power control method thereof |
| CN108112109A (en) * | 2017-12-26 | 2018-06-01 | 深圳国创名厨商用设备制造有限公司 | A kind of individual layer can change the electromagnetic wire coil of heating surface (area) (HS |
| CN108112109B (en) * | 2017-12-26 | 2024-04-26 | 深圳国创名厨商用设备制造有限公司 | Single-layer electromagnetic wire coil capable of changing heating area |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101944855B (en) | Digital control power supply converter for kitchen range | |
| CN101715256B (en) | Electromagnetic induction heating device | |
| Millan et al. | Series resonant inverter with selective harmonic operation applied to all-metal domestic induction heating | |
| US20140125142A1 (en) | Wireless power transfer system for wirelessly transferring electric power in noncontact manner by utilizing resonant magnetic field coupling | |
| CN102984837B (en) | Energy-saving multifrequency electromagnetic induction heating device | |
| CN106813269A (en) | A kind of electromagnetic heating apparatus | |
| CN101390445A (en) | Induction heating apparatus | |
| EP2659733B1 (en) | An induction heating cooker | |
| JP4969676B2 (en) | Induction heating cooker | |
| CN106813271A (en) | A kind of low-power laser heating electromagnetic oven | |
| CN110463344A (en) | Induction heating cooking instrument | |
| JP2007335274A (en) | Induction heating cooker | |
| CN201438767U (en) | Electromagnetic induction heating device | |
| CN102185399B (en) | Multipolar electric excitation frequency-conversion power generator | |
| CN103548416B (en) | Induction heating apparatus and operation method thereof and the home appliances of band induction heating apparatus | |
| EP2774259B1 (en) | An induction heating cooker | |
| JP5020360B2 (en) | Induction heating cooker | |
| CN203563223U (en) | Frequency modulation circuit of induction cooker | |
| JP7107746B2 (en) | electromagnetic induction cooker | |
| CN207573657U (en) | The resonant heating circuit of electromagnetic cooking appliance and with its electromagnetic cooking appliance | |
| CN108419317A (en) | Electromagnetic heating apparatus, electromagnetic heating system and its method for heating and controlling and device | |
| CN206619039U (en) | Electric-controlled plate and cooking apparatus | |
| KR102306808B1 (en) | Induction heat cooking apparatus | |
| Amrhein et al. | A transformer-coupled, series-resonant topology for the induction heating of aluminum cookware | |
| CN203560959U (en) | Teppanyaki induction cooker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100414 |
|
| CX01 | Expiry of patent term |