CN101048019A - Electromagnetic heating device and electromagnetic stove, electric pot, soya-bean milk machine with the device - Google Patents
Electromagnetic heating device and electromagnetic stove, electric pot, soya-bean milk machine with the device Download PDFInfo
- Publication number
- CN101048019A CN101048019A CNA2007100154616A CN200710015461A CN101048019A CN 101048019 A CN101048019 A CN 101048019A CN A2007100154616 A CNA2007100154616 A CN A2007100154616A CN 200710015461 A CN200710015461 A CN 200710015461A CN 101048019 A CN101048019 A CN 101048019A
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- coil
- electromagnetic heater
- ring
- magnetic conductor
- type magnetic
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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 11
- 239000004020 conductor Substances 0.000 claims description 35
- 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 2
- 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
- H05B6/06—Control, e.g. of temperature, of power
- H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
-
- 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
- H05B6/36—Coil arrangements
- H05B6/365—Coil arrangements using supplementary conductive or ferromagnetic pieces
-
- 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
- H05B2206/00—Aspects relating to heating by electric, magnetic, or electromagnetic fields covered by group H05B6/00
- H05B2206/02—Induction heating
- H05B2206/022—Special supports for the induction coils
-
- 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
- H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
- H05B6/1236—Cooking devices induction cooking plates or the like and devices to be used in combination with them adapted to induce current in a coil to supply power to a device and electrical heating devices powered in this way
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Induction Heating Cooking Devices (AREA)
- General Induction Heating (AREA)
- Beans For Foods Or Fodder (AREA)
- Food-Manufacturing Devices (AREA)
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 the ring-type magnetic conductor that at least one independently is provided with.
Described power tube is IGBT.
Described ring-type magnetic conductor is closed.
Described ring-type magnetic conductor has air gap, and air gap 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 the ring-type magnetic conductor that at least one independently is provided with.
The present invention provides a kind of technical scheme to be once more: a kind of electric food warmer that has the above-mentioned electromagnetic heater of claim, 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 the ring-type magnetic conductor that at least one independently is provided with.
The present invention provides a kind of technical scheme to be at last: 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 the ring-type magnetic conductor that at least one independently is provided with.
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, this compensating inductance improves the total inductance amount of resonant tank, 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 minimum in the loss of whole cycle of oscillation, 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 described coil is all or part of, 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 structural representation of second embodiment of electromagnetic heater of the present invention;
Fig. 4 is the parting face structural representation of Fig. 3 embodiment;
Fig. 5 is the structural representation of the 3rd embodiment of electromagnetic heater of the present invention;
Fig. 6 is the parting face structural representation of Fig. 5 embodiment;
Fig. 7 has the structural representation of the electromagnetic stove of electromagnetic heater for the present invention;
Fig. 8 has the structural representation of the soy bean milk making machine of electromagnetic heater for the present invention;
Fig. 9 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 shown in Figure 1 and Figure 2, 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, described coil 1 all passes an independent ring-type magnetic conductor 2 that is provided with, described ring-type magnetic conductor 2 is closed, is located on the coil lead 6.
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.
Embodiment two:
As Fig. 1, Fig. 3, shown in Figure 4, 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, a closed hoop magnetic conductor 2 that is located at coil brace 3 centers is passed in a coiling of described coil 1.
Described closed hoop magnetic conductor 2 can be to be involuted by two sections circular-arc magnetic conductors, and air gap is less than 6mm therebetween; Also can be by having air gap " C " shape magnetic conductor, general air gap be less than 6mm; In addition, the shape of ring-type magnetic conductor 2 also can be done distortion.
Embodiment three:
As Fig. 1, Fig. 5, shown in Figure 6, 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, a closed hoop magnetic conductor 2 that is provided with is separately passed in whole coilings of described coil 1, and closed hoop magnetic conductor 2 is placed on the coil brace 3.
Pass an independent ring-type magnetic conductor 2 that is provided with by 1 coilings of described coil, this ring-type magnetic conductor 2 is saturated 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 the power bracket of broad.
Embodiment four:
As shown in Figure 7, 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 at least one circle passes the ring-type magnetic conductor 2 that at least one independently is provided with.
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 described coil is all or part of, 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 five:
A kind of as shown in Figure 8 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 at least one circle passes the ring-type magnetic conductor 2 that at least one independently is provided with.
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 six:
A kind of as shown in Figure 9 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 at least one circle passes the ring-type magnetic conductor 2 that at least one independently is provided with.
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 rice cooker patents of invention, the groundwork structure clearly illustrates, repeats no more.
Claims (9)
1, a kind of 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 the ring-type magnetic conductor that at least one independently is provided with.
2, electromagnetic heater as claimed in claim 1 is characterized in that described power tube is IGBT.
3, electromagnetic heater as claimed in claim 1 is characterized in that described ring-type magnetic conductor is closed.
4, electromagnetic heater as claimed in claim 1 is characterized in that the ring-type magnetic conductor has air gap, and air gap is less than 6mm.
5, electromagnetic heater as claimed in claim 1 is characterized in that described ring-type magnetic conductor is located at the coil brace center.
6, electromagnetic heater as claimed in claim 1 is characterized in that described ring-type magnetic conductor is located on the coil lead.
7, a kind of electromagnetic stove that has the described electromagnetic heater of the arbitrary claim of claim 1 to 6, 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 the ring-type magnetic conductor that at least one independently is provided with.
8, a kind of electric food warmer that has the described electromagnetic heater of the arbitrary claim of claim 1 to 6, 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 the ring-type magnetic conductor that at least one independently is provided with.
9, a kind of soy bean milk making machine that has the described electromagnetic heater of the arbitrary claim of claim 1 to 6, 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 the ring-type magnetic conductor that at least one independently is provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100154616A CN100499946C (en) | 2007-04-30 | 2007-04-30 | Electromagnetic heating device and electromagnetic stove, electric pot, soya-bean milk machine with the device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100154616A CN100499946C (en) | 2007-04-30 | 2007-04-30 | Electromagnetic heating device and electromagnetic stove, electric pot, soya-bean milk machine with the device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101048019A true CN101048019A (en) | 2007-10-03 |
| CN100499946C CN100499946C (en) | 2009-06-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100154616A Active CN100499946C (en) | 2007-04-30 | 2007-04-30 | Electromagnetic heating device and electromagnetic stove, electric pot, soya-bean milk machine with the device |
Country Status (1)
| Country | Link |
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| CN (1) | CN100499946C (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101904692A (en) * | 2010-07-11 | 2010-12-08 | 黄小珍 | Multi-functional bean milk machine |
| CN103385305A (en) * | 2012-05-12 | 2013-11-13 | 九阳股份有限公司 | Pulping control circuit of cordless soybean milk machine |
| CN103791531A (en) * | 2014-02-28 | 2014-05-14 | 张继云 | Multipurpose hotpot induction cooker |
| CN105526607A (en) * | 2016-01-19 | 2016-04-27 | 胡小庆 | Multi-purpose electrical heating stove |
| CN105992417A (en) * | 2015-02-04 | 2016-10-05 | 佛山市顺德区美的电热电器制造有限公司 | Heating control circuit for electric cooking device, and electric cooking device |
| CN106255248A (en) * | 2016-08-12 | 2016-12-21 | 四川华孚创科铁路设备有限公司 | A kind of railway holdfast heater |
| CN106879095A (en) * | 2015-12-11 | 2017-06-20 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heater and its heating control circuit |
| WO2017133150A1 (en) * | 2016-02-02 | 2017-08-10 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating device and heating control circuit thereof, and low power heating control method |
| CN107509264A (en) * | 2017-09-26 | 2017-12-22 | 深圳市创新先进科技有限公司 | The Electromagnetic Heating combustion chamber and Electromagnetic Heating electricity that a kind of electricity stews stew |
-
2007
- 2007-04-30 CN CNB2007100154616A patent/CN100499946C/en active Active
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101904692A (en) * | 2010-07-11 | 2010-12-08 | 黄小珍 | Multi-functional bean milk machine |
| CN103385305A (en) * | 2012-05-12 | 2013-11-13 | 九阳股份有限公司 | Pulping control circuit of cordless soybean milk machine |
| CN103385305B (en) * | 2012-05-12 | 2016-01-20 | 九阳股份有限公司 | A kind of slurrying control circuit of wireless soy bean milk making machine |
| CN103791531A (en) * | 2014-02-28 | 2014-05-14 | 张继云 | Multipurpose hotpot induction cooker |
| CN105992417A (en) * | 2015-02-04 | 2016-10-05 | 佛山市顺德区美的电热电器制造有限公司 | Heating control circuit for electric cooking device, and electric cooking device |
| CN105992417B (en) * | 2015-02-04 | 2024-04-16 | 佛山市顺德区美的电热电器制造有限公司 | Heating control circuit of electric cooker and electric cooker |
| CN106879095B (en) * | 2015-12-11 | 2023-03-21 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating device and heating control circuit thereof |
| CN106879095A (en) * | 2015-12-11 | 2017-06-20 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heater and its heating control circuit |
| CN105526607A (en) * | 2016-01-19 | 2016-04-27 | 胡小庆 | Multi-purpose electrical heating stove |
| WO2017133150A1 (en) * | 2016-02-02 | 2017-08-10 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating device and heating control circuit thereof, and low power heating control method |
| US10085305B2 (en) | 2016-02-02 | 2018-09-25 | Foshan Shunde Midea Electrical Heating Appiances Manufacturing Co., Ltd. | Electromagnetic heating device and heating control circuit thereof, and low power heating control method |
| CN106255248A (en) * | 2016-08-12 | 2016-12-21 | 四川华孚创科铁路设备有限公司 | A kind of railway holdfast heater |
| CN106255248B (en) * | 2016-08-12 | 2023-06-06 | 四川华孚创科铁路设备有限公司 | Railway anchor heating device |
| CN107509264A (en) * | 2017-09-26 | 2017-12-22 | 深圳市创新先进科技有限公司 | The Electromagnetic Heating combustion chamber and Electromagnetic Heating electricity that a kind of electricity stews stew |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100499946C (en) | 2009-06-10 |
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Address after: No. 999, Mei Li Road, Huaiyin District, Ji'nan, Shandong Patentee after: JOYOUNG Co.,Ltd. Country or region after: China Address before: Xinsha Road, Huaiyin District of Ji'nan city of Shandong Province, No. 12 250118 Patentee before: JOYOUNG Co.,Ltd. Country or region before: China |