CN202110454U - Control circuit of electromagnetic heating cooking utensil - Google Patents
Control circuit of electromagnetic heating cooking utensil Download PDFInfo
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- CN202110454U CN202110454U CN 201120071442 CN201120071442U CN202110454U CN 202110454 U CN202110454 U CN 202110454U CN 201120071442 CN201120071442 CN 201120071442 CN 201120071442 U CN201120071442 U CN 201120071442U CN 202110454 U CN202110454 U CN 202110454U
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 144
- 238000010411 cooking Methods 0.000 title claims abstract description 37
- 238000009835 boiling Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 235000013305 food Nutrition 0.000 abstract description 32
- 235000016709 nutrition Nutrition 0.000 abstract description 3
- 230000035764 nutrition Effects 0.000 abstract description 3
- 239000003990 capacitor Substances 0.000 abstract description 2
- 238000013021 overheating Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000005096 rolling process Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000002045 lasting effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000001413 cellular effect Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000002459 sustained effect Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000009885 systemic effect Effects 0.000 description 1
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Abstract
The utility model discloses a control circuit of an electromagnetic heating cooking utensil, including a high frequency resonance circuit and the IGBT controlling the high frequency resonance circuit. The high frequency resonance circuit includes at least a resonant capacitor and at least two resonant branches, and each resonant branch includes a solenoid and a relay switch controlling the work of the solenoid. In the utility model, the control circuit of an electromagnetic heating cooking utensil solves the local overheating problem at the half radius position of the solenoid through a low cost circuit control scheme; pan burnt and stick problems are not easy to happen; in addition, in the technology scheme, the problem of uneven heating of food is solved, food nutrition is fully mixed, and the flavoring is more fully.
Description
Technical field
The utility model relates to culinary cuisine utensil field, particularly a kind of control circuit of electromagnetism heating appliance for cooking.
Background technology
Along with people's growth in the living standard, the inside, kitchen adopt the cooking apparatus of electromagnetism heating more and more, like electromagnetic oven, electromagnetism meal pot, electromagnetic pressure cooker, electromagnetic water kettle etc.The culinary cuisine utensil of electromagnetism heating is as a kind of new kitchen in kitchen tools market; It has broken the heating principle that traditional naked light cooking method adopts the magnetic field induction electric current; Make utensil heating at a high speed voluntarily itself, be used for heating and cooking food, thereby reach the purpose of cooking.In the prior art; The electromagnetism heating appliance for cooking adopts the electromagnetic induction technology that heated pan is heated; Electromagnetism drum in the electromagnetism heating appliance for cooking can produce alternating magnetic field through the high frequency exchange current time, magnetic field forms eddy-current heating in the bottom of a pan, thus heat food.When reality was used, solenoid radius 1/2 place formed the heating crest, and inwardly outwards successively decreases respectively from here; So the magnetic field intensity that 1/2 place of corresponding pan bottom radii senses is also maximum; Formation temperature is also the highest, causes the pan spot heating overheated, and heat is too concentrated; When continuing heating corresponding to the pan bottom of solenoid heating crest be easy to occur the to be burned problem of sticking pot.
In addition; At present in the control circuit of electromagnetism heating appliance for cooking; When normal heating, adopting solenoid to continue energising usually heats; And when miniwatt heats, adopt the solenoid intermittently power-on to heat, no matter be normal heating state or at the miniwatt heated condition, it can only realize the solenoid integral body in the control circuit is controlled in the prior art.Upwards roll and can drive food in the pan behind the heated liquid, but, have only the pan position corresponding to be in the state of being heated always with solenoid because pan is remained unchanged by thermal site; Because pan receives thermal site to continue to remain unchanged will to cause the liquid dead angle of rolling; Also can there be the dead angle in food with the rolling of liquid, causes the food inequality of being heated, and food nutrition can not fully be stewed out; The tasty deficiency of food also can prolong heat time heating time.
Summary of the invention
The purpose of the utility model is to provide a kind of control circuit of the heating appliance for cooking of electromagnetism cheaply, to solve the deficiency of prior art.
To achieve these goals, the control circuit of the electromagnetism heating appliance for cooking of the utility model is reached through following technical scheme:
A kind of control circuit of electromagnetism heating appliance for cooking; The IGBT that comprises high-frequency circuit and the vibration of control high-frequency circuit; Said high-frequency circuit comprises at least one resonant capacitance and at least two resonance branch roads, and said resonance branch road comprises the relay switch of solenoid and this solenoid work of control.
Further, for being connected in parallel, solenoid and relay switch are connected in series between the said resonance branch road.Said high-frequency circuit comprises two resonance branch roads and a resonant capacitance, and two resonance branch roads all are connected in parallel with resonant capacitance.
Wherein, also can be between the said resonance branch road for being connected in series, solenoid and relay switch are connected in parallel.Said high-frequency circuit comprises two resonance branch roads and a resonant capacitance, is connected in parallel with resonant capacitance after the series connection of two resonance branch roads again.Said high-frequency circuit can also be to comprise that two resonance branch roads reach and corresponding two resonant capacitances of resonance branch road, and resonance branch road and resonant capacitance are connected in parallel.
Wherein, said electromagnetism heating appliance for cooking is electromagnetic oven, electric cooker, electric pressure cooker or boiling water pot.Compared to prior art; The control circuit of the electromagnetism heating appliance for cooking of the utility model has been realized independent respectively control between plural a plurality of solenoids in electromagnetism heating appliance for cooking such as electromagnetic oven, electric cooker, electric pressure cooker or boiling water pot through circuit controlling schemes cheaply; When having solved the electromagnetism heating in the local overheating problem at solenoid radius 1/2 place; Because two or more solenoids can not be in the state of working simultaneously always, therefore along with the transformation of different electric magnetic coil duty, the heating crest is also along with solenoid shifts; Therefore just can there be the situation that a certain localized sustained of pan is constantly heated; Because the heating crest can change, its heating region can be regulated, and just is not prone to the problem of the sticking pot that is burned.And this programme is through alternate cycles heating pan between a plurality of solenoids of single IGBT controlling and driving; Can promote that pot interior liquid rolls, convection current, not have the liquid dead angle of rolling, solve the food uneven problem of being heated; Food nutrition fully mixes, and is tasty also more abundant.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described further.
Fig. 1 is the synoptic diagram of control circuit first embodiment of the utility model electromagnetism heating appliance for cooking.
Fig. 2 is the synoptic diagram of control circuit second embodiment of the utility model electromagnetism heating appliance for cooking.
Fig. 3 is the synoptic diagram of control circuit the 3rd embodiment of the utility model electromagnetism heating appliance for cooking.Fig. 4 is the process flow diagram of the control method of the control circuit of employing the utility model embodiment.
The structural representation of the electromagnetism heating spool rest that Fig. 5 arranges for the coil concentric circles of the utility model embodiment.
Fig. 6 is the structural representation of the cellular electromagnetism heating spool rest of arranging of coil of another embodiment of the utility model.
Among the figure: 1. voltage detecting circuit; 2. temperature detection part; 3. current detection circuit; 4. synchronizing circuit; 5. IGBT driving circuit; 6. control assembly; 7. heater block.
Embodiment
Further specify the technical scheme of the utility model below in conjunction with accompanying drawing and embodiment.
With reference to shown in Figure 1; Synoptic diagram for the control circuit of the electromagnetism heating appliance for cooking of the utility model first embodiment; The control circuit of electromagnetism heating appliance for cooking comprises control assembly 6 and heater block 7; Said heater block 7 comprises at least two the solenoid L1 and the L2 that can independently control; Said control assembly 6 comprises master controller, timer and preset storer, and control assembly 6 is electrically connected with voltage detecting circuit 1, temperature detection part 2, current detection circuit 3, synchronizing circuit 4, IGBT driving circuit 5 respectively.Wherein said voltage detecting circuit 1 links to each other with power supply and is used to detect voltage condition, and said voltage detecting circuit 1 also links to each other with control assembly 6 to control assembly 6 input voltage signals; Said temperature detection part 2 links to each other with control assembly 6 to the real-time pan temperature signal of control assembly 6 inputs; Current detection circuit 3 is serially connected in and is used to detect the current conditions of IGBT1 of flowing through between power supply and the insulated gate bipolar power tube IGBT1, and said current detection circuit 3 also links to each other with control assembly 6 to control assembly 6 input current signals; Said synchronizing circuit 4 links to each other with control assembly 6 with IGBT driving circuit 5 respectively, to control assembly 6 input sync signals.Said control assembly 6 output control signals drive opening and closing of relay S1 and S2 respectively for driving triode Q1 and Q2, thereby control first solenoid L1 of heater block 7 and the heating operation of the second solenoid L2 respectively.Said heating control apparatus also comprises resonant capacitance C1; It is parallelly connected with solenoid L1 and L2; Control assembly 6 also is electrically connected with IGBT driving circuit 5, thus drive insulated gate bipolar power tube IGBT1 open and close heating operation at main road control heater block 7.
In the present embodiment; The control circuit of electromagnetism heating appliance for cooking; The IGBT that comprises high-frequency circuit and the vibration of control high-frequency circuit; High-frequency circuit comprises a resonant capacitance C1 and two resonance branch roads, and wherein the first resonance branch road comprises that the first solenoid L1 in the heater block 7 comprises the second solenoid L2 and the relay switch S2 that controls second solenoid L2 work in the heater block 7 with relay switch S 1, the second resonance branch road that the control first solenoid L1 works.Wherein between the first resonance branch road and the second resonance branch road for being connected in parallel; Be connected in series between the relay switch S 1 of the first solenoid L1 and the control first solenoid L1, be connected in series between the relay switch S2 of the second solenoid L2 and the control second solenoid L2.The first resonance branch road and the second resonance branch road all are connected in parallel with resonant capacitance C1.
When heater block 7 comprised the solenoid that can independently control more than three or three, solenoid was connected with relay switch respectively, solenoid and control the relay switch series connection of this solenoid work after the resonance branch road between be connected in parallel.Resonance branch road more than three or three all is connected in parallel with a resonant capacitance.
With reference to shown in Figure 2; Synoptic diagram for the control circuit of the electromagnetism heating appliance for cooking of the utility model second embodiment; The difference of itself and first embodiment is at the first solenoid L1 and L2 two ends simultaneously parallel resonance capacitor C 3 and C2 respectively; Just high-frequency circuit comprise two resonance branch roads and with corresponding two resonant capacitance C3 of resonance branch road and C2; The resonance branch road is connected in parallel respectively with each self-corresponding resonant capacitance, can make the electromagnetism cooking apparatus realize continuing low-power heating, effectively energy savings with the low-power even the lower power that are lower than 300w.
Embodiment 3
With reference to shown in Figure 3; Synoptic diagram for the control circuit of the electromagnetism heating appliance for cooking of the utility model the 3rd embodiment; The difference of itself and first embodiment is: the first solenoid L1 is connected in parallel with the relay switch S 1 of control first solenoid L1 work in the first resonance branch road; The second solenoid L2 is connected in parallel with the relay switch S 2 of control second solenoid L2 work in the second resonance branch road, and two resonance branch road series connection backs are connected in parallel with resonant capacitance C1.
When heater block 7 comprised the solenoid that can independently control more than three or three, solenoid was parallelly connected with relay switch respectively, solenoid and control the relay switch parallel connection of this solenoid work after the resonance branch road between be connected in series.Resonance branch road series connection back more than three or three is connected in parallel with a resonant capacitance.As shown in Figure 4, be the process flow diagram of the control method of the electromagnetism heating appliance for cooking that adopts the utility model embodiment.Comprise that with heater block 7 the solenoid L1 of two independent controls and the electromagnetic oven structure of L2 are example, the convective heating control method that adopts the multi-thread circle heating control circuit of the utility model in the electromagnetism cooking apparatus is described, as follows:
S101 begins to start electromagnetic oven;
S102, behind the startup electromagnetic oven, master controller starts; Get into original state the stage is set; The user is provided with heating power P, and this moment, the user can be pre-stored in the heating power P value in the preset memory of control assembly 6 based on the systemic presupposition procedure Selection, also can manually import heating power P based on actual conditions; Get into next step S103;
S103, the heat temperature raising stage: all solenoid L1 of main controller controls and L2 be place in circuit simultaneously, heats with power P.This moment, then pan was slow relatively partially with the heat interchange meeting of the interior food of pot if heating power is too high, and the temperature difference between pan and food can be excessive, with the validity that influences temperature detection; And, then need more heat time heating time if heating power is low excessively, therefore said setting power P is set at 1200W-1800W and is advisable.
S104; Being heated food servings calculates: in the S103 heat temperature raising stage; In the heated process of food; Temperature detection part 2 measures the real-time temperature T of pan, the pan temperature that main controller controls timer accounting temperature detection part records required time increment Δ t ' during a unit temperature value of every rising Δ T in uphill process.When the inner food servings N of pan not simultaneously; The pairing time increment Δ of the every rising of pan temperature unit temperature value Δ T t ' also is different; When food servings N was big, spent time of a unit value Δ of the every rising of temperature T was just more, otherwise just few; According to this rule multi-group data that can in the preset storer of master controller, prestore in advance; The corresponding different food deal of each time increment Δ t grade N wherein, master controller be through the time increment Δ t in the actual time increment Δ t ' that records and the preset storer, thereby judge the deal grade N of the food of the interior food of pan.
S105, the convective heating condition judgment in the S103 heat temperature raising stage, continues in the heating process, and system gets into convective heating and need meet some requirements during the stage, can be provided with following condition:
Rule of judgment one: temperature is judged: in preset storer, set a reference temperature T in advance
0, when temperature sensing circuit 2 detects the pan temperature T>=T that obtains
0, get into the next step S106 convective heating stage, and if T<t
0, then continue heating.Owing to when kettle temperature reaches more than 90 ℃, continue heating and can make the bottom of a pan local boiling, cause tangible convection current, therefore said reference temperature T
0It is more suitable to be set to more than 90 ℃, certain said reference temperature T
0Also can be set to other temperature values, but for the circulation heats, said reference temperature T
0Be that effect is better more than 90 ℃ the time, if reference temperature is provided with and lowly gets into the convective heating stage too early, then the food boiling is slower.
Rule of judgment two: food servings is judged: in preset storer, set a benchmark deal N in advance
0, as actual food servings N>=N
0The time, get into the next step S106 convective heating stage, and if N<n
0The time, then continue heating by prior art.Benchmark deal N is set in system
0The time correspondence be provided with t heat time heating time
0, be N promptly when heating deal
0Food the time, need heating t
0Time; When the heating deal is N
1Food the time, need heating t
1Time; Its time that need heat of different food deal also has nothing in common with each other, and these parameters are pre-stored in the preset storer.
In S105 convective heating condition judgment step, can be provided with only needs to satisfy a Rule of judgment T>=T
0Promptly carry out the S106 convective heating stage, also can be provided with and to satisfy said temperature simultaneously and two conditions of food servings could get into the next step S106 convective heating stage.
S106 gets into the convective heating stage: drive single solenoid successively and heat, the heating of turn-offing the second solenoid L2 earlier only drives the first solenoid L1 and begins to heat; Carry out a period of time rear drive when first solenoid L1 heating and cut off the first solenoid L1, the first solenoid L1 stops heating, drives simultaneously to be communicated with the second solenoid L2, and the second solenoid L2 begins to heat; After a period of time is carried out in second solenoid L2 heating, stopping second solenoid L2 heating starts the first solenoid L1 simultaneously and heats; Circulation according to this.
When adopting relay S1 and S2 to control the access of solenoid L1 and L2 and breaking off as electronic switch; Because the operating characteristic of relay; Do not have resonance current in the circuit in the time of when at transfer relay, can guaranteeing the relay switching, can guarantee the security and the reliability of relay work.Can carry out as follows, the entering convective heating is elder generation's switch-off power during the stage, the signal interval that master controller monitoring synchronizing circuit 4 sends; When master controller is not when monitoring signal in section sometime, then showing has not had resonance current on the coil panel, can safe transfer relay; May command relay S1 adhesive this moment, relay S2 discharges, and starts heating; The first solenoid L1 inserted and heated this moment, and the second solenoid L2 breaks off and stops heating; Switch-off power after a period of time is carried out in heating, pilot relay S1 does not discharge when having resonance current in the decision circuitry, and relay S2 adhesive starts heating, and the second solenoid L2 inserted and heated this moment, and the first solenoid L1 breaks off and stops heating; Circulation according to this.
When adopting relay to control the access of solenoid L1 and L2 as electronic switch; Can also adopt following scheme: get into convective heating elder generation's switch-off power during the stage, postponing one section safety time can safe transfer relay, may command relay S1 adhesive at this moment after at interval; Relay S2 discharges; Start heating, the first solenoid L1 inserted and heated this moment, and the second solenoid L2 breaks off and stops heating; Switch-off power after a period of time is carried out in heating postpones the back pilot relay S1 release at interval of one section safety time then, and relay S2 adhesive starts heating, and the second solenoid L2 inserted and heated this moment, first solenoid L1 disconnection stopping heating; Circulation according to this.The safety time of said delay gets final product greater than resonance current resonance time in the circuit at interval, is generally tens microseconds.
In the convective heating stage; In order to reach the effect that better convection current is rolled and heated, need adjust according to the deal N of food in the pot for the different heating power of the first solenoid L1 and the second solenoid L2 and heat time heating time, the cycle period of each coil panel; In pot the deal N of food more for a long time, solenoid L1 and the L2 separately power of heating will strengthen, the round-robin cycle also will prolong; In the pot amount of food more after a little while, the power that solenoid L1 and L2 heat separately will reduce, the round-robin cycle also suitably shortens.Wherein for being positioned at the inboard coil of drum, its heating power is set to 700W-1000W and gets final product; For the coil that is positioned at the drum outside, because heating surface (area) (HS is bigger, its heating power is set to 1200W-1600W and is advisable.In circulation heating process, generally need 4-6 about second inner food just can form convection circulation, therefore can not be lower than this shortest time lasting heat time heating time for single solenoid, otherwise can not form the effect of rolling.Select lowlyer when heating power, such as inner coil 700W, outer coil 1200W, lasting cycle heat time heating time of then total heat time heating time and single coil also will prolong thereupon, the generation of the effect of just guaranteeing to roll.And if it is higher that heating power is selected, such as inner coil 1000W, outer coil 1600W, lasting cycle heat time heating time of then total heat time heating time and single coil can suitably shorten.Said coil L1 can be arranged in the preset storer according to different food servings N correspondences with setting of L2 heating power and single coil lasting heat time heating time of cycle parameter in advance, is directly called by master controller when needing.Reference capacity N promptly is set in system
0The time be provided with t heat time heating time except correspondence
0The outer also corresponding circulation heating power P that is provided with
01And P
02, be N when adding thermal capacity
0Food the time, need heating t
0Time, convective heating during the stage the first solenoid L1 with P
01Power, the second solenoid L2 with P
02The power heating that circulates respectively; Also be provided with other the food servings grade and the respective value of heating power in the system, promptly also have nothing in common with each other at the corresponding heating power of convective heating stage single coil dish during the different food capacity.
Whether S107 judges to reach heat time heating time based on different deal N to be worth t preset heat time heating time, if accomplish Preset Time, then gets into next step S108;
S108, alarm user heating is accomplished; This moment, the user can initiatively shut down, and did not then get into next step S109 if the user initiatively shuts down;
S109, shutdown finishes heating.
As Fig. 4 and shown in Figure 5 be the structure of the electromagnetism heating spool rest of the utility model embodiment.Heater block 7 in the described heating control apparatus of preamble mainly comprises the electromagnetism heating spool rest; The electromagnetism heating spool rest comprises wire coil rack and is arranged on the solenoid on the wire coil rack; Wire coil rack mainly is the support as solenoid, and the solenoid that is arranged on the wire coil rack can be as shown in Figure 4, and the mode of arranging by concentric circles is arranged and can be realized independent control; Respectively be the first solenoid L1, the second solenoid L2, the 3rd solenoid L3; When circulating when heating, three groups of coils insert successively and heat, with hot spot disperse from outer toward interior or from interior outward or according to other the heating sequence realization convection current heating of rolling.Certainly; Solenoid on the wire coil rack also can be as shown in Figure 5; By the respectively independent control of arranging of cellular mode; Be followed successively by the first solenoid L1, the second solenoid L2, the 3rd solenoid L3 ..., wherein solenoid adds up to two or more, and when heating circulation, each coil was realized the convection current heating of rolling according to the certain sequence access circuit.No matter be electromagnetism heating spool rest structure or the cellular electromagnetism heating spool rest structure of arranging that concentric circles is arranged; Wherein the number of coil is not limited to two or three; Each coil is independently controlled, and certainly when being provided with a plurality of solenoid, can control two above solenoid heating simultaneously at every turn; For example earlier control L1 and L2 heat simultaneously, control L2 then and L3 heats or the like simultaneously.
Because the two or more solenoids in the heater block 7 can not be in the state of working simultaneously always; Therefore along with the transformation of different electric magnetic coil duty; Therefore the heating crest just can not exist the situation to the continuous heating of a certain localized sustained of pan along with solenoid shifts yet, because the heating crest can change; Its heating region can be regulated, and just is not prone to the problem of the sticking pot that is burned.
Those of ordinary skill in the art will be appreciated that; Above embodiment is used for explaining the utility model; And be not the qualification that is used as the utility model; As long as in the connotation scope of the utility model, all will drop in claims scope of the utility model variation, the modification of the above embodiment.
Claims (7)
1. the control circuit of an electromagnetism heating appliance for cooking; The IGBT that comprises high-frequency circuit and the vibration of control high-frequency circuit; It is characterized in that: said high-frequency circuit comprises at least one resonant capacitance and at least two resonance branch roads, and said resonance branch road comprises the relay switch of solenoid and this solenoid work of control.
2. the control circuit of electromagnetism heating appliance for cooking according to claim 1 is characterized in that: for being connected in parallel, solenoid and relay switch are connected in series between the said resonance branch road.
3. the control circuit of electromagnetism heating appliance for cooking according to claim 2 is characterized in that: said high-frequency circuit comprises two resonance branch roads and a resonant capacitance, and two resonance branch roads all are connected in parallel with resonant capacitance.
4. the control circuit of electromagnetism heating appliance for cooking according to claim 1 is characterized in that: for being connected in series, solenoid and relay switch are connected in parallel between the said resonance branch road.
5. the control circuit of electromagnetism heating appliance for cooking according to claim 4 is characterized in that: said high-frequency circuit comprises two resonance branch roads and a resonant capacitance, is connected in parallel with resonant capacitance after the series connection of two resonance branch roads again.
6. the control circuit of electromagnetism heating appliance for cooking according to claim 4 is characterized in that: said high-frequency circuit comprises that two resonance branch roads reach and corresponding two resonant capacitances of resonance branch road, and resonance branch road and resonant capacitance are connected in parallel.
7. the control circuit of electromagnetism heating appliance for cooking according to claim 1 is characterized in that: said electromagnetism heating appliance for cooking is electromagnetic oven, electric cooker, electric pressure cooker or boiling water pot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120071442 CN202110454U (en) | 2010-03-26 | 2011-03-17 | Control circuit of electromagnetic heating cooking utensil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010133175.1 | 2010-03-26 | ||
| CN 201010133175 CN101808433A (en) | 2010-03-26 | 2010-03-26 | Convection heating control method of electromagnetic oven and heating control device |
| CN 201120071442 CN202110454U (en) | 2010-03-26 | 2011-03-17 | Control circuit of electromagnetic heating cooking utensil |
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| CN202110454U true CN202110454U (en) | 2012-01-11 |
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| CN 201010133175 Pending CN101808433A (en) | 2010-03-26 | 2010-03-26 | Convection heating control method of electromagnetic oven and heating control device |
| CN 201120071442 Expired - Fee Related CN202110454U (en) | 2010-03-26 | 2011-03-17 | Control circuit of electromagnetic heating cooking utensil |
| CN 201110064977 Active CN102200301B (en) | 2010-03-26 | 2011-03-17 | Convection heating control method of electromagnetic oven and heating control device |
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2010
- 2010-03-26 CN CN 201010133175 patent/CN101808433A/en active Pending
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2011
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Also Published As
| Publication number | Publication date |
|---|---|
| CN102200301A (en) | 2011-09-28 |
| CN102200301B (en) | 2012-11-21 |
| CN101808433A (en) | 2010-08-18 |
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