CN109041312A - Induction heating cooker - Google Patents
Induction heating cooker Download PDFInfo
- Publication number
- CN109041312A CN109041312A CN201810916217.5A CN201810916217A CN109041312A CN 109041312 A CN109041312 A CN 109041312A CN 201810916217 A CN201810916217 A CN 201810916217A CN 109041312 A CN109041312 A CN 109041312A
- Authority
- CN
- China
- Prior art keywords
- heating coil
- heating
- temperature
- heated material
- temperature detector
- 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.)
- Pending
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 140
- 230000006698 induction Effects 0.000 title claims abstract description 32
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims description 40
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000002241 glass-ceramic Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000530 Gallium indium arsenide Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/12—Cooking devices
Abstract
The invention discloses an induction heating cooker, which comprises a top plate, a heating device and a heating device, wherein the top plate is used for supporting an object; a plurality of heating coils adjacent to each other below the top plate for generating an induction magnetic field to heat the object; a plurality of temperature detectors for detecting a temperature of the object, wherein a plurality of heating coils are arranged in a plurality of directions crossing each other, the temperature detectors being installed between the plurality of heating coils; a controller for controlling the operation states of the heating coils based on the detection results of the temperature detectors, wherein a plurality of the temperature detectors are disposed below the top plate such that at least one of the temperature detectors is located below the object when the object is located above two adjacent heating coils, and the number of the temperature detectors is smaller than the number of the heating coils.
Description
Technical field
The present invention relates to kitchen tool field, specifically a kind of induction heating cooker.
Background technique
The induction heating cooker being conventionally known has the multiple heating coils being just parallelly disposed with respect to one another under the top plate, to add
Hot such as metal cooker.Traditional induction heating cooker has multiple culinary art coils, the induction heating relative to heating location
Cooker is provided with flat placement and differentiates part, for detecting the state for the pan being placed on top plate, so as in face of heating position
It sets, allows to select heating coil to be used from multiple heating coils.Therefore, induction heating cooker is not configured as permitting
Family allowable freely determines position of the metal cooker on top plate.
Summary of the invention
The purpose of the present invention is to provide a kind of induction heating cookers, to solve the problems, such as to propose in background technique.For reality
Existing above-mentioned purpose, the present invention provide the following technical solutions；
A kind of induction heating cooker, including top plate, are used to support heated material；Multiple heating coils, in the top plate
Lower section is adjacent to each other, and the heated material is heated for generating induced magnetic field；Multiple temperature detectors, it is described for detecting
The temperature of heated material, plurality of heating coil are arranged in multiple directions intersected with each other, the temperature detector peace
It fills between multiple heating coils；Controller controls the heater wire for the testing result based on the temperature detector
The lower section of the top plate is arranged in the mode of operation of circle, the plurality of temperature detector, so that working as the heated material
When above two adjacent heating coils, at least one described temperature detector is located at below the heated material, and
The quantity of the temperature detector is less than the quantity of the heating coil.
Preferably, each temperature detector includes infrared detection device, operational amplifier and two resistors, wherein
One end of one resistor is connected to one end of the infrared detection device and another resistor, another resistance
Device is connected respectively to the output end and reversed-phase output of the operational amplifier.
Preferably, the induction heating cooker further includes switch element, inverter circuit and operation display, the control
The signal that device is sent according to the operation display controls the inverter circuit by the switch element and is supplied to described add
The high-frequency current of heat coil starts and stops heating to control the heating coil.
Preferably, each heating coil includes the resonance potential detection for detecting the resonance potential of inverter circuit
It device and is used to determine whether to have placed the object detector of heated material.
Preferably, the temperature detector is screwed on heating coil bracket at the position of the central lower of heating coil,
Expose temperature detector, the temperature detector and the heating coil by the hole that the central part of the heating coil is formed
Integrally formed heating coil unit.
Preferably, by controlling the turn-on time of the switch element, so that the electric current for flowing through the heating coil increases,
So as to cause by the increase of the heating coil and the resonance potential of resonant capacitor generation.
Compared with prior art, the beneficial effects of the present invention are: the heating of many minor diameters is arranged in induction heating cooker
The heating coil of coil, the minor diameter is disposed adjacent to each other and user is allowed to determine the position for placing object, passes through design
The arrangement of temperature detector, while inhibiting cost, the temperature of object can be accurately detected and improving safety.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of heating coil unit provided by the invention；
Fig. 2 is the structural schematic diagram of induction heating cooker provided by the invention
Fig. 3 is the structural schematic diagram of the inverter circuit of induction heating cooker provided by the invention；
Fig. 4 is the structural schematic diagram of the infrared temperature detector of induction heating cooker provided by the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, carries out to the technical aspect in the embodiment of the present invention clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1-Fig. 4 is please referred to, a kind of embodiment provided by the invention:
A kind of induction heating cooker 20, the top plate 1 and multiple heating coils 3 being provided on surface mounted thereto, heating
Coil 3 is used for the heated material 2 being placed on by generation high frequency magnetic field come induction heating on top plate 1.Top plate 1 is situated between by electrical isolation
Matter is formed, for example, nearly transparent and light transmission glass ceramics, to transmit infrared ray.Each heating coil 3 is arranged in top plate 1
The spiral winding (circular coil) of lower section is in circular ring shape, has the hole substantially limited in its center.It is arranged below top plate 1
Close in each direction in vertical and horizontal of multiple heating coils 3 and linearly arrange, for example, nine column heating coils and
Five-element's heating coil respectively along longitudinal direction with it is transversely arranged.Operation display 4 is arranged in the user side (front side) of top plate 1, to permit
Family allowable provides instruction, for example, heating coil 3 starts and stop heating.
Example using infrared sensor 5 as temperature detector, for detecting the heated material being placed on top plate 1
2 temperature.Infrared sensor 5 has the function of detection object temperature.Central lower of the infrared sensor 5 in heating coil 3
It is screwed at position on heating coil bracket 6.Expose infrared sensor 5 by the hole that the central part of heating coil 3 is formed, it is infrared
Sensor 5 and heating coil are integrally formed heating coil unit.Multiple heating coil units are arranged in such a way, so that red
Outer sensor 5 is equipped with alternate heating coil 3 in vertical and horizontal in each direction.Other heating coils 3, i.e., other
There is no infrared sensor 5 at alternate heating coil 3, therefore, the heating coil 3 of no infrared sensor 5 can have diameter
Reduced centre bore, so as to so that outer diameter becomes smaller.Not having the heating coil 3 of infrared sensor 5 to be less than has infrared sensor 5
Heating coil 3.
Each infrared sensor 5 includes infrared detection device 51, operational amplifier 52 and two resistors 53,54.Each
One end of resistor 53,54 is connected to the other end of infrared detection device 51 and resistor 53, and 54 are connected respectively to operation amplifier
The output end and reversed-phase output of device 52.Infrared detection device 51 is light receiving element, for passing through the infrared of top plate 1
Electric current is allowed to flow through when line irradiates.The electric current generated by infrared detection device 51 is amplified by operational amplifier 52.Then, it is output to
Infrared detection signal 55 (correspond to voltage value V) of the controller 7 as the temperature of instruction heated material 2.
Induction heating cooker 20 further includes the rectification that alternating voltage for providing commercial power sources 8 is converted into DC voltage
Smooth 9 and inverter circuit 10 for generating high-frequency current export institute from rectification smooth 9 when providing DC voltage
The high-frequency current of generation is to a corresponding heating coil 3.Induction heating cooker 20 further includes an input electric cur- rent measure device 11,
For detecting the input current flowed out from commercial power sources 8.
Rectifying smooth 9 includes the full-wave rectifier 91 being made of bridge diode and low-pass filter, low-pass filtering
Device is made of choking-winding 92 interconnected between whole output terminals and smoothing capacity device 93.Inverter circuit 10 includes
Switch element 101 (IGBT), the diode 102 being connected between inverse parallel and switch element 101, and it is connected in parallel on heating coil 3
Resonant capacitor 103, when the switch element 101 of inverter circuit 10 switches on and off, generate high-frequency current, inverter electricity
Road 10 and heating coil 3 constitute high-frequency inverter.
Induction heating cooker 20 further includes controller 7, for controlling inverter circuit 10 by switch element 101, to control
System is supplied to the high-frequency current of heating coil 3 from inverter circuit 10.Controller 7 receives the signal sent from operation display 4
Start and stop heating.Operation display 4 receives the signal sent from controller 7 and shows information to communicate with user, to promote
User is set to operate induction heating cooker 20.
In addition, each heating coil 3 of induction heating cooker 20 includes the resonance potential for detecting inverter circuit 10
Resonance potential detector 12 and be used to determine whether to have placed the object detector 13 of heated material 2, heating coil 3
Impedance changed, heater wire according to the size of the presence or absence of heated material 2 and the heated material 2 of side placed on it
Therefore the magnitude of current that circle 3 flows through inverter circuit 10 also changes, then resonance potential also changes.Specifically, control switch element
101 turn-on time allows the detected value detected from input electric cur- rent measure device 11 to become predetermined value, switch element 101
The increase of turn-on time causes the electric current for flowing through heating coil 3 to increase, so as to cause by heating coil 3 and resonant capacitor 103
The increase of the resonance potential of generation.By making detection electric current flow through heating coil 3 and being examined by will test electric current with by object
It surveys the threshold value that device 13 is set to be compared, determines and whether there is heated material 2 above each heating coil 3, if object
Detector 13 determines that heated material 2 has been placed in corresponding 3 top of heating coil, then detects signal and be output to controller
7。
Further, emit and indicate that the infrared ray of the bottom temp of heated material 2 is logical from the bottom surface of heated material 2
Cross top plate 1 enter and received by infrared sensor 5, infrared sensor 5 again detect institute received infrared ray with will test it is red
The infrared detection signal that outside line obtains is output to controller 7.The infrared control that controller 7 is detected according to infrared sensor 5
Switch element 101 is switched on or switched off, to control heating of the heating coil 3 to heated material 2.
When user connects induction heating cooker 20 and heated material 2 is placed on any position of top plate 1, controller
7 execute the detection operation of heated material 2.Specifically, detection signal flows through all heating coils 3 of induction heating cooker 20,
And then whether detection heated material 2 has been placed in each 3 top of heating coil, current detector to object detector 13
11 and resonance voltage detector 12 each detection signal is output to controller 7.Heater wire with respective infrared sensor 5
Circle pre-registers in the microcomputer of controller 7 (that is, by the information associated with heating coil 3 of infrared sensor 5, often
A heating coil 3 has been registered as with infrared sensor 5).If controller 7 determines material to be heated based on the information recorded
Body 2 has been placed on the position of two or more 3 tops of adjacent heating coils, and two or more it is adjacent plus
There are infrared sensor 5 below the central part of at least one in heat coil 3, the operation display of display 4 placed to be added
The message of hot object 2, and can begin to warm up to promote user to begin to warm up.
When user, which executes heating, starts operation, multiple heating coils 3 by being located at 2 lower section of heated material generate high frequency
Magnetic field, so that the eddy heating for heating caused by high voltage of heated material 2.When the temperature for increasing heated material 2 by heating
When, the infrared ray of energy corresponding with temperature is emitted from the bottom surface of heated material 2, in general, from the infrared energy of object emission
Amount is determined by the temperature of object, and is increased as the temperature rises, and the glass ceramics for top plate 1 can be in such as 0.5-
The infrared energy of transmission 90% or more in 2.5 μm of wave-length coverage.
Infrared detection device 51 is made of the photodiode of the peak sensitivity for example with about 950nm, if to be added
The bottom surface temperature of hot object 2 is more than 250 DEG C.As shown in figure 3, the infrared energy that wave-length coverage is about 1 μm enters infrared biography
Sensor 5, when the infrared detection signal 55 that the infrared ray detected from infrared sensor 5 obtains is input to controller 7, controller
77 calculate detection temperature.It therefore, can be accurately if heated material 2 (such as pan) reaches such as 250 DEG C of high temperature
The temperature of pan is detected, so as to inhibit abnormal temperature to increase.Photodiode for infrared detection device 51
The InGaAs more sensitive than under long wavelength is cheap, and can be used as the sensor for being limited to overheating protection function.
In addition, infrared sensor 5 is integrated with heating coil 3, by the way that infrared sensor 5 is screwed to heating coil branch
Heating coil unit is formed on frame 6, to be monitored from the nearly central part of heating coil 3.With this configuration, if to
Heating object 2 has been placed in above heating coil unit, it may be considered that heated material 2 is reliably placed in heating coil
3 and infrared sensor 5 top.It can detecte heater wire by the infrared sensor 5 of the nearly central portion of heating coil 3
Heated material 2 right above circle 3, temperature increase is most fast, therefore can be highly sensitive and detects temperature accurately to control
Heating operation heats heated material 2.Moreover, because can exception that is sensitive and reliably detecting heated material 2 add
Heat, it is possible to quickly stop heating, to improve safety.
In addition, using such configuration, wherein each multiple heating coils 3 with infrared sensor 5 are longitudinal and horizontal
To each of on be alternately arranged, and in other alternate heating coils 3 do not have infrared sensor 5.Therefore, logical
It crosses at least two adjacent heating coils 3 and heats heated material 2, the heating coil 3 with infrared sensor 5 is inevitably
Positioned at the lower section of heated material 2.This structure allows to heat object 2 and is placed on multiple heating coils 3 and infrared sensor 5
Therefore top can not only accurately control the temperature of heated material 2, but also can add to avoid heating object 2 is abnormal
Heat, so as to sensitive and accurately detection infrared sensor 5 quantity, so as to improve safety.Moreover, because can be with
Reduce the installation number of infrared sensor 5, it is possible to effectively utilize the space of whole equipment.In addition, not having infrared biography
The heating coil 3 of sensor 5 does not need centre bore, therefore the diameter of centre bore can be smaller, to keep whole device more compact.Separately
Outside, the reduction of the installation number of infrared sensor 5 can make the reduction of equipment cost.Moreover, using infrared sensor 5 as temperature
Degree detector quickly detects the temperature of heated material 2 than heat-conduction-type protractor.It can thus be avoided heated material 2
Extremely it is heated, to improve safety.Temperature detection thermistor may be used as temperature detector to replace infrared sensor.
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art,
It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc.
With replacement, all within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in this
Within the protection scope of invention.
Claims (6)
1. a kind of induction heating cooker, it is characterised in that: including top plate, be used to support heated material；Multiple heating coils,
It is adjacent to each other below the top plate, the heated material is heated for generating induced magnetic field；Multiple temperature detectors, are used for
The temperature of the heated material is detected, plurality of heating coil is arranged in multiple directions intersected with each other, the temperature
Detector is installed between multiple heating coils；Controller controls institute for the testing result based on the temperature detector
State the mode of operation of heating coil, the lower section of the top plate is arranged in the plurality of temperature detector so that when it is described to
When heating object above two adjacent heating coils, at least one described temperature detector is located at the heated material
Lower section, and the quantity of the temperature detector is less than the quantity of the heating coil.
2. a kind of induction heating cooker according to claim 1, it is characterised in that: each temperature detector includes red
Outer detecting element, operational amplifier and two resistors, one end of one of them resistor are connected to the infrared detection
One end of element and another resistor, another resistor are connected respectively to the output end of the operational amplifier and anti-
Phase output terminal.
3. a kind of induction heating cooker according to claim 2, it is characterised in that: the induction heating cooker further includes out
Element, inverter circuit and operation display are closed, the controller passes through described according to the signal that the operation display is sent
Switch element controls the high-frequency current that the inverter circuit is supplied to the heating coil, is started with controlling the heating coil
It is heated with stopping.
4. a kind of induction heating cooker according to claim 3, it is characterised in that: each heating coil includes being used for
It detects the resonance potential detector of the resonance potential of inverter circuit and is used to determine whether to have placed heated material
Object detector.
5. a kind of induction heating cooker according to claim 4, it is characterised in that: the temperature detector is in heating coil
Central lower position at be screwed on heating coil bracket, temperature is exposed by the hole that the central part of the heating coil is formed
Detector is spent, the temperature detector and the heating coil are integrally formed heating coil unit.
6. induction heating cooker according to claim 5, it is characterised in that: when conducting by controlling the switch element
Between, so that the electric current for flowing through the heating coil increases, it is humorous so as to cause being generated by the heating coil and resonant capacitor
The increase of vibration voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810916217.5A CN109041312A (en) | 2018-08-13 | 2018-08-13 | Induction heating cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810916217.5A CN109041312A (en) | 2018-08-13 | 2018-08-13 | Induction heating cooker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109041312A true CN109041312A (en) | 2018-12-18 |
Family
ID=64632995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810916217.5A Pending CN109041312A (en) | 2018-08-13 | 2018-08-13 | Induction heating cooker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109041312A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111654933A (en) * | 2020-06-15 | 2020-09-11 | 哈尔滨理工大学 | Intelligent electromagnetic heating assembly |
| CN113126168A (en) * | 2019-12-31 | 2021-07-16 | 广东美的白色家电技术创新中心有限公司 | Detection method, device, equipment and storage medium |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104221470A (en) * | 2012-10-22 | 2014-12-17 | 松下电器产业株式会社 | Induction heating cooker |
-
2018
- 2018-08-13 CN CN201810916217.5A patent/CN109041312A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104221470A (en) * | 2012-10-22 | 2014-12-17 | 松下电器产业株式会社 | Induction heating cooker |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113126168A (en) * | 2019-12-31 | 2021-07-16 | 广东美的白色家电技术创新中心有限公司 | Detection method, device, equipment and storage medium |
| CN111654933A (en) * | 2020-06-15 | 2020-09-11 | 哈尔滨理工大学 | Intelligent electromagnetic heating assembly |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181218 |
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| RJ01 | Rejection of invention patent application after publication |