CN100403853C - Electromagnetic heating device and electromagnetic stove, soya-bean milk machine and electric pot - Google Patents
Electromagnetic heating device and electromagnetic stove, soya-bean milk machine and electric pot Download PDFInfo
- Publication number
- CN100403853C CN100403853C CNB2007100154620A CN200710015462A CN100403853C CN 100403853 C CN100403853 C CN 100403853C CN B2007100154620 A CNB2007100154620 A CN B2007100154620A CN 200710015462 A CN200710015462 A CN 200710015462A CN 100403853 C CN100403853 C CN 100403853C
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- Prior art keywords
- electromagnetic heater
- coil
- electromagnetic
- bean milk
- soya
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- 235000010469 Glycine max Nutrition 0.000 title claims description 23
- 244000068988 Glycine max Species 0.000 title claims description 23
- 239000008267 milk Substances 0.000 title claims description 23
- 210000004080 milk Anatomy 0.000 title claims description 23
- 235000013336 milk Nutrition 0.000 title claims description 23
- 238000010438 heat treatment Methods 0.000 title abstract description 12
- 239000004020 conductor Substances 0.000 claims description 17
- 235000013305 food Nutrition 0.000 claims description 10
- 238000010411 cooking Methods 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 abstract description 2
- 230000006698 induction Effects 0.000 abstract 1
- 230000000630 rising effect Effects 0.000 abstract 1
- 241000209094 Oryza Species 0.000 description 5
- 235000007164 Oryza sativa Nutrition 0.000 description 5
- 235000009566 rice Nutrition 0.000 description 5
- 229920006395 saturated elastomer Polymers 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000005674 electromagnetic induction Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000012055 fruits and vegetables Nutrition 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
Images
Classifications
-
- 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
Abstract
The invention relates to an electromagnetic heating unit, including a coil, a coil holder, magnetic stripes, a resonant capacitor, power tubes, a rectifier circuit, and a driving control circuit. The character is that at least one-turn of coil goes through at least one group of magnet ring which is composed of magnet and magnetic strips, and the described power transistor is IGBT. The invention also relates to the devices with this kind of electromagnetic heating unit, such as induction cooker etc. The saturation of the magnet ring in a certain working region dynamically adjusts the inductance of coil, which can effectively resolves the problem of a high temperature rising of low-power working condition.
Description
Technical field
The invention discloses a kind of electromagnetic heater, belong to the electroheat technology field, disclose the electromagnetic stove, electric food warmer, the soy bean milk making machine that have this device simultaneously.
Background technology
Electromagnetic heating technique is that the principle of utilizing electromagnetic induction to produce eddy current heats utensil, and widespread usage adopts the capacitor and inductor antiresonant circuit mostly in electrical equipment such as electromagnetic stove, electric cooker at present.Electromagnetic stove for example, select for use IGBT (abbreviation of Isolation Gate Bipolar Transistor igbt) as a kind of power tube, because the parameter of resonant circuit all is the application of mainly satisfying under the high-power state, when high power work, IGBT is in the passing zero trigger state, and loss is very little.When selecting low-power operation, IGBT can't realize passing zero trigger, has caused higher loss, causes the IGBT temperature rise higher, causes power tube to damage when serious, so can't realize the continuous heating under the low power state, is the insoluble problem of the industry always.
The reason that causes this result is because the selection of the resonant parameter of general circuit all is a operating state when high-power determines.But, constant resonant circuit parameters is difficult to satisfy simultaneously the interval job requirement of continuous high-low power of broad, operating state in the time of can't taking into account high-low power, resonant circuit loses condition of resonance in the time of will inevitably causing low-power operation, and the switching loss and the temperature that show as IGBT sharply rise.
Summary of the invention
Technical problem solved by the invention provides a kind of electromagnetic heater, and the higher problem of power tube temperature rise in the time of can effectively solving low-power operation can realize selecting the power bracket of broad; Simultaneously this electromagnetic heater is applied to electromagnetic stove, electric food warmer, soy bean milk making machine, safe and reliable, continuous heating power wide ranges.
A kind of technical scheme provided by the present invention is: a kind of electromagnetic heater, comprise coil, coil brace, magnetic stripe, resonant capacitance, power tube, rectification circuit, Drive and Control Circuit, it is characterized in that at least one circle of described coil passes at least one group of ring bodies that is formed by magnetic conductor and described magnetic stripe.
Described power tube is IGBT.
The air gap of described ring bodies is less than 6mm.
Secondly the present invention provides a kind of technical scheme to be: a kind of electromagnetic stove that has above-mentioned electromagnetic heater, comprise loam cake, lower cover, panel, electromagnetic heater, described electromagnetic heater comprises coil, coil brace, magnetic stripe, resonant capacitance, power tube, rectification circuit, Drive and Control Circuit, it is characterized in that at least one circle of described coil passes at least one group of ring bodies that is formed by magnetic conductor and described magnetic stripe.
The present invention provides a kind of technical scheme to be once more: a kind of soy bean milk making machine that has above-mentioned electromagnetic heater, comprise reducing mechanism, soya-bean milk cooking device, described reducing mechanism comprises motor, crushing knife tool, described soya-bean milk cooking device comprises cup, electromagnetic heater, described electromagnetic heater comprises coil, coil brace, magnetic stripe, resonant capacitance, power tube, rectification circuit, Drive and Control Circuit, it is characterized in that at least one circle of described coil passes at least one group of ring bodies that is formed by magnetic conductor and described magnetic stripe.
The present invention provides a kind of technical scheme to be at last: a kind of electric food warmer that has above-mentioned electromagnetic heater, comprise pot cover, shell, interior pot, control device, electromagnetic heater, described electromagnetic heater comprises coil, coil brace, magnetic stripe, resonant capacitance, power tube, rectification circuit, Drive and Control Circuit, it is characterized in that at least one circle of described coil passes at least one group of ring bodies that is formed by magnetic conductor and described magnetic stripe.
Working mechanism of the present invention and the beneficial effect that brings are such:
At least one circle of coil passes at least one ring-type magnetic conductor that independently is provided with, and forms compensating inductance in resonant tank, and this compensating inductance and coil are series relationship on electric principle.
During low-power, by the compensating inductance that increases on the coil, this compensating inductance and coil are series relationship on electric principle, improve the total inductance amount of resonant tank with this, and because the part magnetic loop closed in itself that this compensating inductance produces, do not pass heating appliances, thereby do not participate in heating directly, so the loss in whole cycle of oscillation is minimum, the remaining energy of later half cycle coil that has guaranteed vibration still can make the C pole tension of IGBT approach zero when opening, because the increase of total inductance amount reduces resonance frequency, the switching loss of IGBT is minimized simultaneously.
During high power, the coil magnetization electric current can increase greatly, this moment is because the restriction of compensating inductance permeability magnetic material characteristic and physical structure, magnetic flux by permeability magnetic material will no longer increase to some greatly, just reach magnetic saturation, alternating current component in the electric current can not cause the variation of magnetic flux more at this moment, compensating inductance also just quite is zero at the inductance value of this operation interval, because the total inductance amount of the saturated back of compensating inductance resonant tank will descend, thereby make resonant circuit can also remain on resonance operating state preferably, IGBT still can the work of low-loss state.
The winding inductance quantity of prior art all is constant, the present invention then passes the ring-type magnetic conductor that at least one independently is provided with by at least one circle of described coil, this ring-type magnetic conductor is saturated certain operation interval, the dynamic inductance value of adjusting resonant tank, compensate the state of resonant circuit when different operating powers, operating voltage, make resonant circuit in the high-low power scope, can both remain on good resonance condition under the heated condition continuously, can realize the power bracket of working under the continuous heated condition of broad.
Electromagnetic heater of the present invention is applied to the technical scheme of electromagnetic stove, electric food warmer, soy bean milk making machine, brings same technique effect.
Description of drawings
Be described further below in conjunction with accompanying drawing:
Fig. 1 is the prior art circuits principle schematic;
Fig. 2 is the structural representation of first embodiment of electromagnetic heater of the present invention;
Fig. 3 is the parting face structural representation of Fig. 2;
Fig. 4 has the structural representation of the electromagnetic stove of electromagnetic heater for the present invention;
Fig. 5 has the structural representation of the soy bean milk making machine of electromagnetic heater for the present invention;
Fig. 6 has the structural representation of the electric food warmer of electromagnetic heater for the present invention.
Wherein: 1, coil; 2, magnetic conductor; 3, coil brace; 4, magnetic stripe; 6 coil leads; 8 rectification circuits; 9, Drive and Control Circuit; 11, electromagnetic heater; 21, lower cover; 22, loam cake; 23, panel; 31, crushing knife tool; 32, cup; 33, motor; 41, interior pot; 42, shell; 43, pot cover; 44, control device
Embodiment
Embodiment one:
As Fig. 1, Fig. 2, shown in Figure 3, a kind of electromagnetic heater, comprise coil 1, coil brace 3, magnetic stripe 4, resonant capacitance, IGBT (the most frequently used power tube), rectification circuit 8, Drive and Control Circuit 9, coil 1 all passes one group of ring bodies that is formed by magnetic conductor 2 and described magnetic stripe 4, air gap is less than 6mm therebetween, and present embodiment is air gap 0.1mm.
The known part of the related electromagnetic heating circuit of electromagnetic heater of the present invention, fully open in the disclosed in early days patent documentation, for example publication number is a kind of electromagnetic oven control device utility model patent of CN2697496, the electromagnetic heating circuit basic functional principle is clearly illustrated, repeat no more.
Pass the ring bodies that forms by magnetic conductor 2 and described magnetic stripe 4 by described coil 1 whole coilings, this ring bodies is saturated at certain operation interval, the dynamic inductance value of adjusting coil 1, compensate the state of resonant circuit when different operating powers, operating voltage of forming by coil 1, magnetic stripe 4, resonant capacitance, reduced the loss of IGBT when low power run, the higher problem of IGBT temperature rise in the time of can effectively solving low-power operation can realize selecting than broad power band.
Certainly, ring bodies also can be two groups or more, can both realize the object of the invention.
Embodiment two:
As shown in Figure 4, a kind of electromagnetic stove that has the described electromagnetic heater of the foregoing description, comprise loam cake 22, lower cover 21, panel 23, electromagnetic heater 11, described electromagnetic heater 11 comprises coil 1, coil brace 2, magnetic stripe 3, resonant capacitance, IGBT, rectification circuit 8, Drive and Control Circuit 9, and described coil 1 all passes one group of ring bodies that is formed by magnetic conductor 2 and described magnetic stripe 4.
Electromagnetic stove is the electric equipment that the principle of utilizing electromagnetic induction to produce eddy current heats pan, when electromagnetic stove during in low-power operation, the IGBT temperature rise is higher, it is an insoluble problem always, by passing the ring-type magnetic conductor 2 that at least one independently is provided with at coil 1 at least one circle, form one can be saturated compensating inductance.The winding inductance quantity of prior art all is constant, the present invention then passes the ring-type magnetic conductor that at least one independently is provided with by at least one circle of described coil, this ring-type magnetic conductor is saturated certain operation interval, the dynamic inductance value of adjusting resonant tank, compensate the state of resonant circuit when different operating powers, operating voltage, make resonant circuit in the high-low power scope, can both remain on good resonance condition under the heated condition continuously, can realize the power bracket of working under the continuous heated condition of broad.
Embodiment three:
A kind of as shown in Figure 5 soy bean milk making machine that has the described electromagnetic heater of the foregoing description, comprise reducing mechanism, soya-bean milk cooking device, described reducing mechanism comprises motor 33, crushing knife tool 31, described soya-bean milk cooking device comprises cup 32, electromagnetic heater 11, described electromagnetic heater 11 comprises coil 1, coil brace 2, magnetic stripe 3, resonant capacitance, IGBT, rectification circuit 8, Drive and Control Circuit 9, and described coil 1 all passes one group of ring bodies that is formed by magnetic conductor 2 and described magnetic stripe 4.
The present invention has the known technology part of the related soy bean milk making machine of soy bean milk making machine of this electromagnetic heater, fully open in the disclosed in early days patent documentation, for example the patent No. is that 02110332.1 heating soybean milk method and heater and the application invention patent on soy bean milk making machine, the patent No. are 03112424.0 full-automatic soybean milk machine and pulping process patent of invention thereof, soy bean milk making machine groundwork structure is clearly illustrated, repeat no more.
Soy bean milk making machine of the present invention can be a domestic type, also can be commercial, except cooking soya-bean milk, can also cook rice paste, fruits and vegetables soup etc.
Embodiment four:
A kind of as shown in Figure 6 electric food warmer that has the described electromagnetic heater of the foregoing description, comprise pot cover 43, shell 42, interior pot 41, control device 44, electromagnetic heater 11, described electromagnetic heater 11 comprises coil 1, coil brace 2, magnetic stripe 3, resonant capacitance, IGBT, rectification circuit 8, Drive and Control Circuit 9, and described coil 1 all passes one group of ring bodies that is formed by magnetic conductor 2 and described magnetic stripe 4.
Electric food warmer of the present invention can be a various ways, for example a kind of electric rice cooker, electric pressure cooker, boccaro slaughterhouse.
The present invention has related electric rice cooker, electric pressure cooker, the boccaro slaughterhouse known technology part of electric food warmer of this electromagnetic heater, fully open in the disclosed in early days patent documentation, for example the patent No. is that 200610042105.9 ceramic electric cooker patents of invention, the patent No. are that 98105278.9 electric rice cooker patents of invention, the patent No. are 99124663.2 electromagnetic induction heating electric rice cooker patents of invention, the groundwork structure clearly illustrates, repeats no more.
Claims (6)
1. an electromagnetic heater comprises coil, coil brace, magnetic stripe, resonant capacitance, power tube, rectification circuit, Drive and Control Circuit, it is characterized in that, at least one circle of described coil passes at least one group of ring bodies that is formed by magnetic conductor and described magnetic stripe.
2. electromagnetic heater as claimed in claim 1 is characterized in that described power tube is an igbt.
3. electromagnetic heater as claimed in claim 1, the air gap that it is characterized in that ring bodies is less than 6mm.
4. an electromagnetic stove comprises loam cake, lower cover, panel, electromagnetic heater, it is characterized in that described electromagnetic heater is the described electromagnetic heater of arbitrary claim in the claim 1 to 3.
5. soy bean milk making machine, comprise reducing mechanism, soya-bean milk cooking device, described reducing mechanism comprises motor, crushing knife tool, and described soya-bean milk cooking device comprises cup, electromagnetic heater, it is characterized in that described electromagnetic heater is the described electromagnetic heater of arbitrary claim in the claim 1 to 3.
6. an electric food warmer comprises pot cover, shell, interior pot, control device, electromagnetic heater, it is characterized in that described electromagnetic heater is the described electromagnetic heater of arbitrary claim in the claim 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100154620A CN100403853C (en) | 2007-04-30 | 2007-04-30 | Electromagnetic heating device and electromagnetic stove, soya-bean milk machine and electric pot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100154620A CN100403853C (en) | 2007-04-30 | 2007-04-30 | Electromagnetic heating device and electromagnetic stove, soya-bean milk machine and electric pot |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101048020A CN101048020A (en) | 2007-10-03 |
| CN100403853C true CN100403853C (en) | 2008-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100154620A Active CN100403853C (en) | 2007-04-30 | 2007-04-30 | Electromagnetic heating device and electromagnetic stove, soya-bean milk machine and electric pot |
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| Country | Link |
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| CN (1) | CN100403853C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107528465B (en) * | 2016-06-15 | 2019-11-29 | 广东美的生活电器制造有限公司 | Cooking machine and cooking machine circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002195653A (en) * | 2000-12-21 | 2002-07-10 | Sekisui Chem Co Ltd | Electric water heater |
| JP2004030965A (en) * | 2002-06-21 | 2004-01-29 | Fuji Electric Holdings Co Ltd | Induction heating device |
| CN2702572Y (en) * | 2004-05-10 | 2005-05-25 | 广东美的集团股份有限公司 | An electromagnetic oven coil panel |
| CN1863418A (en) * | 2006-03-21 | 2006-11-15 | 山东九阳小家电有限公司 | Method for reducing electromagnetic interference of electromagnetic oven and anti-leakage electromagnetic over coiler |
-
2007
- 2007-04-30 CN CNB2007100154620A patent/CN100403853C/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002195653A (en) * | 2000-12-21 | 2002-07-10 | Sekisui Chem Co Ltd | Electric water heater |
| JP2004030965A (en) * | 2002-06-21 | 2004-01-29 | Fuji Electric Holdings Co Ltd | Induction heating device |
| CN2702572Y (en) * | 2004-05-10 | 2005-05-25 | 广东美的集团股份有限公司 | An electromagnetic oven coil panel |
| CN1863418A (en) * | 2006-03-21 | 2006-11-15 | 山东九阳小家电有限公司 | Method for reducing electromagnetic interference of electromagnetic oven and anti-leakage electromagnetic over coiler |
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| Publication number | Publication date |
|---|---|
| CN101048020A (en) | 2007-10-03 |
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