CN108338692A - A kind of electromagnetic induction roasting cooking utensils - Google Patents
A kind of electromagnetic induction roasting cooking utensils Download PDFInfo
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- CN108338692A CN108338692A CN201710064222.3A CN201710064222A CN108338692A CN 108338692 A CN108338692 A CN 108338692A CN 201710064222 A CN201710064222 A CN 201710064222A CN 108338692 A CN108338692 A CN 108338692A
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- electromagnetic induction
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J37/00—Baking; Roasting; Grilling; Frying
- A47J37/06—Roasters; Grills; Sandwich grills
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Abstract
A kind of electromagnetic induction roasting cooking utensils, including baking tray (200) and heated base；The baking tray (200) includes the measuring and controlling temp heating layer (201) for constituting the heat-conducting metal layer of container shapes (202) and being attached on heat-conducting metal layer (202)；The measuring and controlling temp heating layer (201) is using the nickel for including 35.5wt%~36.0wt%, the iron of 63.5wt%~64.5wt%, and the dilval that the impurity less than 0.5wt% is constituted, and thickness is 0.3mm~0.6mm.The electromagnetic induction roasting cooking utensils of the present invention are ingenious in design, highly practical.
Description
Technical field
The present invention relates to cooker field more particularly to a kind of electromagnetic induction burnings with stability and higher temperatures control precision
Roasting cooker.
Background technology
Barbecue is a kind of entertainment way being suitable for more people's party leisure, is sipped tea and chatted now with friend's party movable
Increase, when movable with select roast dessert be highly desirable.But most of barbecue utensils are inconvenient for operation, indoor flue gas is big, cigarette ash
It is attached on food that there are hygienic issues, and temperature is not easy to control, and is susceptible to burnt or does not cook phenomenon, burning is not achieved
Bake the deliciousness having.It is excessively high that the big problem of barbecue smoke is mainly derived from temperature, limits edible oil temperature, so that it may to reduce barbecue
Oil smoke.On the other hand, the cooker of electromagnetic induction heating has been popularized for many years, and the temperature control of maximum problem is indirect, original
Reason is by power control, and power control carries out artificial master according to experiences such as size of food, kind, environment temperatures by user
Control is seen, electromagnetic heating apparatus itself does not have automatic temperature-adjusting control function mostly, even if there is temperature control, is also based on temperature biography
The setting of sensor, control heating power is come what is realized, and the effect is unsatisfactory.There is patent to speak of recently and controls electricity using curie point
The idea of magnetic induction cookware peak temperature solves the problems, such as that reaching certain temperature does not continue to heating, but does not solve very well
The test problems of temperature before this limit point are certainly arrived, temperature control reliability is low, and noise is big, and performance is unstable, therefore in these years
Corresponding electromagnetic induction heating system never obtains extraordinary popularization.
Invention content
The present invention can accurately control barbecue in view of the above-mentioned problems, propose a kind of roasting cooking utensils of electromagnetic induction heating
Oil temperature is heated under the temperature for generating barbecue oil smoke and ensures the deliciousness of food roasting, while there is stability.
Technical solution proposed by the present invention is as follows：
The present invention proposes a kind of electromagnetic induction roasting cooking utensils, including baking tray and heated base；The baking tray includes being used for
The measuring and controlling temp heating layer for constituting the heat-conducting metal layer of container shapes and being attached on heat-conducting metal layer；The measuring and controlling temp adds
Thermosphere use include 35.5wt%~36.0wt% nickel, the iron of 63.5wt%~64.5wt%, and miscellaneous less than 0.5wt%
Texture at dilval, thickness be 0.3mm~0.6mm；
The heated base includes the support device for being used to support baking tray, for generating alternating magnetic field when being powered so as to survey
Inductance coil disk, the resonant capacitance for composition LC resonance circuit in parallel with inductance coil disk of control temp heating layer fever
Device, for according to measuring and controlling temp heating layer material adjust LC resonance circuit resonant frequency resonance synchronous detection unit, be used for
The resonant transfer detection unit of the resonant frequency transfer of LC resonance circuit is detected by high-speed counter and for according to resonance
Frequency translation calculates the arithmetic processor of measuring and controlling temp heating layer temperature.
In the above-mentioned electromagnetic induction roasting cooking utensils of the present invention, annular groove is offered in support device；Inductance coil disk is arranged
In annular groove.
In the above-mentioned electromagnetic induction roasting cooking utensils of the present invention, measuring and controlling temp heating layer further includes the copper less than 0.5wt%, this
When, the content of iron is 63.0wt%~64.5wt%.
In the above-mentioned electromagnetic induction roasting cooking utensils of the present invention, when support device baking tray, measuring and controlling temp heating layer with
The distance between inductance coil disk is 6mm~12mm.
Further include the electricity for providing driving current to LC resonance circuit in the above-mentioned electromagnetic induction roasting cooking utensils of the present invention
Magnetic induction heater switch device, and be connected respectively with electromagnetic induction heating switching device and arithmetic processor, for receiving fortune
It calculates the control signal of processor and is driven to control the electromagnetic switch for the driving current size that electromagnetic induction heating switching device is provided
Moving cell.
In the above-mentioned electromagnetic induction roasting cooking utensils of the present invention, it is connected between arithmetic processor and inductance coil disk for examining
The electromagnetic induction waveform of LC resonance circuit is surveyed to protect the electromagnetic waveforms detection unit of LC resonance circuit safety；Electromagnetic waveforms detect
Unit includes the resonance current detection unit of the resonance current for detecting LC resonance circuit and defeated for detecting LC resonance circuit
Go out the energy balance detection unit of power.
In the above-mentioned electromagnetic induction roasting cooking utensils of the present invention, the measuring and controlling temp heating layer is located at heat-conducting metal layer bottom,
Heat-conducting metal layer thickness is 2mm~10mm；Baking tray further includes the culinary applications layer being attached to successively on the inside of heat-conducting metal layer and prevents
Viscous rust-proof coating.
In the above-mentioned electromagnetic induction roasting cooking utensils of the present invention, culinary applications layer is made of stainless steel or aluminum alloy materials.
In the above-mentioned electromagnetic induction roasting cooking utensils of the present invention, the heat-conducting metal layer includes the copper material of at least 2mm thickness
The aluminium material layer of layer or at least 3mm thickness.
In the above-mentioned electromagnetic induction roasting cooking utensils of the present invention, anti-sticking rust-proof coating uses the adhesive system of foodstuff sanitation-stage
At.
The present invention sets wrong there are one preventing metal widget from surprisingly falling into electromagnetic induction heating region in heated base
The accidentally mechanism of heating, specific practice are that (such as round metal area diameter is small when being less than to a certain degree by the area of heating metallic object
In 80mm) when, electromagnetism output can be automatically closed in heated base, to prevent from being heated by mistake；The detection method of metal widget is
Detection is by the inductance value of heating metallic object and electromagnetic induction coil composition, wherein being played the work of inductance core by heating metallic object
With the inductance value that heated base forms magnetic core with electromagnetic induction coil is detected, and then inductance value is big greatly for metal bulk area, instead
The small then inductance value of metal bulk area it is small.In fact when metal bulk area is constant, but its relative permeability is if there is a change, magnetic
The inductance value that core is formed with coil can also change, and the effect generated with metallic object area change is equal.Therefore when heating bottom
Seat detection by heating metal bulk area it is small to a certain extent when can drastically weaken be even switched off electromagnetism output, with heated base detect
To by the relative permeability of heating metallic object it is small arrive certain numerical value, heated base also can drastically weaken is even switched off electromagnetism output
Situation is equivalent.
The electromagnetic induction roasting cooking utensils research of the present invention can be such that food materials bake in the case of edible oil not smoke, but
It is unlikely to the fired temperature for keeping food materials cooked-on, this temperature is according to oil product difference, generally between 170 DEG C to 250 DEG C, limit temperature
Degree is 250 DEG C, and most food oils can all smolder more than this temperature, so by the cooking there are surplus
Maximum temperature is limited in 230 DEG C hereinafter, present invention design takes 230 DEG C of threshold values in order to control.The present invention is studied again for handing over simultaneously
To the formula of the alloy material of the measuring and controlling temp heating layer of baking tray heating, the alloy material of the measuring and controlling temp heating layer in varying magnetic field
The magnetic core being equal on electromagnetic induction coil disk selects suitable alloy formula and heat treatment process to make the opposite magnetic of the magnetic core
Conductance varies with temperature generation respective change, and the low value of its relative permeability is made to select in the food most high fever studied
Near roasting temperature, when baking tray temperature is close to or up to temperature limiting point, becoming smaller and cause LC due to magnetic core relative permeability
Becoming smaller for circuit inductance amount then causes resonant frequency to shift, and heated base detects that LC inductance values subtract by resonant frequency transfer
It is weak just to be controlled close to threshold value, due in temperature maximum limit point manufacture measuring and controlling temp heating layer alloy material it is opposite
The low value of magnetic conductivity is determined that heated base detects that the inductance value variation of coil panel is equal to the metal parts heated at this time
Size is less than the case where reasonable size, and heated base also can determine whether to be that the accident of metal widget is fallen into, i.e., is exported to electromagnetism
Power, which drastically weakens, to be even switched off, and the control of this heated base had both played the protective effect that metal widget is surprisingly fallen into, simultaneously
Play the role of limiting baking tray fired temperature superelevation again.The present invention detects metal widget using electromagnetic induction heating and controls
While the variation of the relative permeability of measuring and controlling temp heating layer alloy material is detected again, play temperature control, prevent temperature super
The function of limit, electromagnetic induction roasting cooking utensils of the invention are ingenious in design, highly practical.The present invention is not high from cost, is applicable in manufacture
Angularly set off in search is suitble to the material of measuring and controlling temp heating layer, and for the present invention using iron-nickel alloy, iron is very cheap, and nickel is expensive,
But content control is suitable all right, to which overall cost is effectively controlled.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing：
Fig. 1 shows the schematic diagram of the electromagnetic induction roasting cooking utensils of the embodiment of the present invention；
Fig. 2 shows the schematic diagrames of electromagnetic induction roasting cooking utensils shown in FIG. 1；
Fig. 3 shows electromagnetic induction roasting cooking utensils explosive view shown in Fig. 2；
Fig. 4 shows the diagrammatic cross-section of the baking tray of electromagnetic induction roasting cooking utensils shown in Fig. 3；
Fig. 5 shows a kind of dilval for manufacturing the nickel containing 35.5wt%~36.0wt% of measuring and controlling temp heating layer
The relative permeability of steel (Ni355)-temperature map relationship measured drawing；
Fig. 6 shows the section relative permeability-temperature map relationship measured drawing of temperature in Fig. 5 from 160 DEG C to 280 DEG C.
Specific implementation mode
The technical problem to be solved by the present invention is to：Existing most of barbecue utensils are inconvenient for operation, indoor flue gas is big, cigarette
Ash is attached on food there are hygienic issues, and temperature is not easy support control, is susceptible to burnt or does not cook phenomenon, is not achieved
Roast the deliciousness having.The technical thought that the present invention is proposed with regard to the technical problem is：Research can be in edible oil not smoke
In the case of so that food materials is baked, but be unlikely to the fired temperature for keeping food materials cooked-on.Study again in alternating magnetic field give baking tray
The material prescription and heat treatment process of the magnetic core of heating make the relative permeability low value of the magnetic core select in the food studied
Near object highest fired temperature, in this way, realizing the purpose of limitation baking tray highest fired temperature.
In order to keep the technical purpose, technical solution and technique effect of the present invention apparent, in order to art technology
Personnel understand and implement the present invention, and the present invention will be further described in detail below in conjunction with the accompanying drawings and the specific embodiments.
As depicted in figs. 1 and 2, Fig. 1 shows the schematic diagram of the electromagnetic induction roasting cooking utensils of the embodiment of the present invention；Fig. 2 shows
The schematic diagram of electromagnetic induction roasting cooking utensils shown in FIG. 1 is gone out；Fig. 3 shows electromagnetic induction roasting cooking utensils explosion shown in Fig. 2
Figure；Fig. 4 shows the diagrammatic cross-section of the baking tray of electromagnetic induction roasting cooking utensils shown in Fig. 3.Electromagnetic induction roasting cooking utensils include
Baking tray 200；The baking tray 200 includes heat-conducting metal layer 202 for constituting container shapes and is attached to heat-conducting metal layer 202
Measuring and controlling temp heating layer 201；In the present embodiment, measuring and controlling temp heating layer 201 be arranged the bottom of heat-conducting metal layer 202 with
Inductance coil disk 101 is coaxial close, and distance is 6mm~12mm；It is appreciated that in other embodiments, measuring and controlling temp heating layer
201 can be arranged at the top of heat-conducting metal layer 202.The measuring and controlling temp heating layer 201 using include 35.5wt%~
The dilval (Ni355) that 36.0wt% nickel, 0~0.5wt% copper and 63.5wt%~64.5wt% iron are constituted, in order to keep
Dilval (Ni355) magnetic characteristic it is steady in a long-term, the wherein various total impurities such as manganese, silicon, phosphorus, sulphur, carbon must be limited in
0.5wt% or less；Specifically, impurity include 0~0.4wt% manganese, 0~0.30wt% silicon, 0~0.020wt% phosphorus, 0~
0.020wt% sulphur and 0~0.03wt% carbon；Using the hardness of heat treatment process adjustment dilval (Ni355), make the alloy
Have the characteristics that magnetic conductivity with temperature respective change and makes relative permeability influence inductance value variation and the metal of its maximum temperature
The numerical value that widget influences inductance value variation is close, while by the way that control threshold is arranged to maximum temperature limitation selection at 230 DEG C；
Electromagnetic induction roasting cooking utensils further include being used to support baking tray and providing alternating magnetic field to measuring and controlling temp heating layer 201, make its generation
Corresponding alternating current and the heated base to heat up.Herein, measuring and controlling temp heating layer 201 heats up, and can be led by heat transfer
Metal layer 202 heats, to realize the baking function of electromagnetic induction roasting cooking utensils.Due to the material of measuring and controlling temp heating layer 201
Expect the restriction of component, the relative magnetic permeability rate score low value o'clock of 201 material of measuring and controlling temp heating layer is at 230 DEG C.In this way, working as thermometric control
It is defeated drastically to weaken even stopping electromagnetic power for heated base when the temperature of warm heating layer 201 reaches relative permeability low value point
Go out, so that the temperature of heat-conducting metal layer 202 stops at relative permeability low value point；Baking tray temperature maintains 230 DEG C in this way
Left and right, food materials can be baked at this time, edible oil will not smoke, meanwhile, food materials are unlikely to cooked-on again.
Further, heated base includes the support device 110 for being used to support baking tray 200, for generating friendship when being powered
Varying magnetic field is so that the inductance coil disk 101 that measuring and controlling temp heating layer 201 generates heat；Annular groove 112 is offered in support device 110；
Inductance coil disk 101 is arranged in annular groove 112.Heated base further includes in parallel with inductance coil disk 101 for composition LC
The resonant capacitor 102 of resonance circuit.The quadrangle of support device 110 is respectively arranged with limited post 111, when baking tray 200 is placed on
When in support device 110, four limited posts 111 are the horizontal degree of freedom for limiting baking tray 200.Support device 110 supports baking tray
Measuring and controlling temp heating layer 201 and the distance between inductance coil disk 101 be 6mm~12mm, in this way, when baking tray 200 is placed on
When in support device 110, measuring and controlling temp heating layer 201 constitutes inductor, measuring and controlling temp heating layer 201 with inductance coil disk 101
As the magnetic core of inductor.The phenomenon that inductance coil disk 101 makes measuring and controlling temp heating layer 201 generate heat is to use eddy-current heating original
Reason, specifically, after inductance coil disk 101 is powered, 201 inside of measuring and controlling temp heating layer generates the eddy current of induction, and
Thus resistance heat is generated.In this course, inductance coil disk 101 realizes the non-contact thermal of baking plate 200.It can manage
Solution, the electric current for flowing through inductance coil disk 101 are alternating current.
Because of reasons such as the ferromagnetic property variations and the variation of electromagnetic induction waveform of 201 material of measuring and controlling temp heating layer, usually
Electromagnetic induction heating system easy to produce the multiple clutter noise for making us being difficult to bearing at work, in order to make electromagnetic induction add
Heat is more suitable for the electromagnetic induction performance of 201 material of measuring and controlling temp heating layer of the present embodiment, avoids multiple harmonic, clutter noise
Generation, the resonant frequency of the LC resonance circuit of the present embodiment designs in 40KHz or more；Meanwhile heated base further includes and electricity
Feel the connection of coil panel 101 one end, resonant frequency for adjusting LC resonance circuit according to 201 material of measuring and controlling temp heating layer it is humorous
Shake synchronous detection unit 103, is connect with 101 other end of inductance coil disk, for detecting LC resonance circuit by high-speed counter
Resonant frequency transfer resonant transfer detection unit 104, and examined respectively with resonance synchronous detection unit 103 and resonant transfer
Unit 104 is surveyed to be electrically connected, for shifting the arithmetic processor for calculating 201 temperature of measuring and controlling temp heating layer according to resonant frequency
107.Herein referring to relative permeability-temperature curve in Fig. 5, when 201 temperature of measuring and controlling temp heating layer is at 160 DEG C to 280
DEG C section in when changing, variation from big to small, the resonant frequency of LC resonance circuit can also occur for relative magnetic permeability value
Also can occur to shift variation accordingly.
Fig. 5 shows a kind of dilval steel for manufacturing the nickel containing 35.5wt% or so of measuring and controlling temp heating layer 201
(Ni355) relative permeability-temperature map relationship measured drawing, the dilval ladle include 35.5wt% nickel, 0.5wt% copper with
And 63.6wt% iron, surplus are impurity, wherein impurity includes manganese, silicon, phosphorus, sulphur or carbon etc..By Fig. 5 it can be seen that, this nickel
There are one the curves that one direction declines variation at 160 DEG C Celsius~280 DEG C or so for the relative magnetic permeability value of ferroalloy steel (Ni355)
Section is reduced in this section of curve section relative magnetic permeability value with the raising of temperature referring to Fig. 6, when temperature is from 160 DEG C toward 280 DEG C
When rising, the relative permeability of dilval steel (Ni355) is intended to minimum value from maximum value decline, is used as magnetic core to act at this time
Measuring and controlling temp heating layer 201 will influence the inductance value of LC resonance circuit and decline, arithmetic processor 107 examined by resonant transfer
It surveys unit 104 and detects that relative magnetic permeability rate score enters the threshold range being previously set, control electromagnetic induction heating effect subtracts
It is weak until completely close, make baking tray peak temperature limiting at 230 DEG C or less.According to shown in Fig. 5, Fig. 6 curve 170 DEG C~
Multiple control threshold points can also be previously set according to different needs in one direction constant interval there are one 230 DEG C or so,
Different temperature points are corresponded to using the method for active control output power to be controlled, and baking tray is made to be cooked according to different food barbecuings
It needs, into different constant temperature points.
Further, in the present embodiment, baking tray 200 further includes the cooking for being attached to 202 inside of heat-conducting metal layer successively
Application layer 203 and anti-sticking rust-proof coating 204.Herein, 202 generally use heat conductivility of heat-conducting metal layer is preferable, and thickness exists
The copper or aluminium metal sheet of 2mm~10mm is made, and the rustless property of metallic copper and metallic aluminium, sanitation performance be not it is fine,
Generally layer of material can be set up in the inside of baking tray material 200, form the culinary applications layer 203.Usually, culinary applications layer
203 are made of stainless steel or aluminum alloy materials；Anti-sticking rust-proof coating 204 is used for real using the adhesive of foodstuff sanitation-stage
Existing hygienic and not viscous characteristic.
Further, 201 temperature T of measuring and controlling temp heating layer is：
Wherein, f is the relative magnetic permeability that the temperature map of measuring and controlling temp heating layer 201 is 201 material of measuring and controlling temp heating layer
The mapping relations of rate；
L is the length of inductance coil disk 101；
f0For the resonant frequency of LC resonance circuit；
N is the number of turns of inductance coil disk 101；
K is k-factor, depends on the ratio of the radius R and its length l of inductance coil disk 101, is obtained by looking into k value tables；k
Value table is common knowledge, is just repeated no more here.
μ0For space permeability, specially 4 π × 10-7H/m；
C is the capacitance of resonant capacitor 102；
S is the sectional area of inductance coil disk 101.
The specific derivation process of 201 temperature T formula of measuring and controlling temp heating layer is as follows：
In LC resonance circuit, have：
Wherein, f0For the resonant frequency of LC resonance circuit；
L is the inductance value of inductor；
C is the capacitance of resonant capacitor 102.
In above-mentioned formula, due to the resonant frequency f of LC resonance circuit0It can be measured by resonance synchronous detection unit 103
It obtains；The capacitance C of resonant capacitor 102 is it is known that then, the inductance value L of inductor can be calculated.
And in the inductor, there is experience formula：
Wherein, L is the inductance value of inductor；
μ0For space permeability, specially 4 π × 10-7H/m；
μrFor the relative permeability of 201 material of measuring and controlling temp heating layer；
N is the number of turns of inductance coil disk 101；
S is the sectional area of inductance coil disk 101；
L is the length of inductance coil disk 101；
K is k-factor, depends on the ratio of the radius R and its length l of inductance coil disk 101, can look into k value tables and obtain.
In the empirical equation of inductor current amount, due to k, μ0, N, S and l be it is known that in this way, being calculated L
Afterwards, you can acquire μr。
For measuring and controlling temp heating layer 201 material maximum temperature limitation or less when, relative permeability μrWith temperature
T existence function relationship f are spent, it is similar as shown in Figure 5；In this way, the relative permeability μ of the material of measuring and controlling temp heating layer 201rWith temperature
The functional relation of degree T can be expressed as：
μr=f (T)； (3)
By formula (1), (2) and (3), the calculation formula of 201 temperature T of above-mentioned measuring and controlling temp heating layer can be obtained：
Further, in the present embodiment, arithmetic processor 107 can be SoC integrated circuits (System on a
Chip, interior to contain MCU, operational amplifier, comparator, logic circuit and driving circuit etc.).
Heated base further includes the electromagnetic induction heating switching device 108 for providing driving current to LC resonance circuit,
And it is connected respectively with electromagnetic induction heating switching device 108 and arithmetic processor 107, for receiving arithmetic processor 107
Signal is controlled to control the electromagnetic switch driving unit for the switching drive signal that electromagnetic induction heating switching device 108 is provided
109。
Further, in electromagnetic induction heating work, temperature change causes relative permeability μrVariation, LC resonance circuit
Resonant frequency transfer variation also occurs, electromagnetic induction effect and eddy current effects change and will influence electromagnetic wave deformation
Change, the pernicious variation of electromagnetic waveforms sometimes can cause working performance to decline, including efficiency declines, noise increases, when serious very
To the damage for causing electromagnetic induction heating device.In the present embodiment, connect between arithmetic processor 107 and inductance coil disk 101
It is connected to the electromagnetic induction waveform for detecting LC resonance circuit, and the canceration for limiting electromagnetic induction waveform thereby protects LC resonance electricity
The electromagnetic waveforms detection unit of road safety, specifically, electromagnetic waveforms detection unit include the resonance for detecting LC resonance circuit
The resonance current detection unit 105 of electric current and energy balance detection unit 106 for detecting LC resonance output power of circuit.It is logical
Energy balance detection unit 106 is crossed, when detecting that LC resonance output power of circuit reaches threshold value, is issued warning signal；Fortune
Processor 107 is calculated for after receiving pre-warning signal, passing through electromagnetic switch driving unit 109 and electromagnetic induction heating switching device
The power supply of 108 broken inductance coil disks 101.In addition, by arithmetic processor 107 to resonant transfer detection unit 104, resonance electricity
The processing for flowing the detection data of detection unit 105 and energy balance detection unit 106, can reach makes cooking cook ware is controlled to add
The effect that heat, constant temperature are cooked.
In another embodiment, in conjunction with Fig. 4, baking tray 200 can be processed into circular discs or other shapes, it is desirable that can hold
Be cooked food, the material of baking tray should can be with electromagnetic heating, in the present embodiment, in baking tray, heat-conducting metal layer 202
It is combined together with heat-conducting metal layer 202, the combination of hot high pressure welding method may be used in two kinds of materials, such as using soldering, low temperature
It is certain it is noted that accomplish that contact is good when pressing, in order to avoid because mechanical shock and the reason of expanding with heat and contract with cold change, to
Influence heating or heat-conducting effect.
Wherein, heat-conducting metal layer 202 is cooked food for constituting container shapes and contact and heat conduction.Measuring and controlling temp heats
Layer 201 is arranged in the bottom of heat-conducting metal layer 202, and 202 thickness of heat-conducting metal layer is 2mm~10mm；Baking tray 200 further includes successively
It is attached to the culinary applications layer 203 and anti-sticking rust-proof coating 204 of 202 inside of heat-conducting metal layer.
Wherein, heat-conducting metal layer 202 includes the copper material layer of at least 2mm thickness, another selection is at least 3mm thickness
Aluminium material layer.Heat-conducting metal layer material should not be too thin, has to ensure the uniform effect of heat conduction, and otherwise alloy material can be because of temperature
Spend the uneven of uneven its magnetic conductivity variation, it is contemplated that the limit temperature function of electromagnetic induction heating can be of serious failure.At this
In inventive embodiments, the copper material bed of material at least wants 2mm thickness or more, layer of aluminum at least to want 3mm or more, otherwise just will appear different
Often.
Wherein, 201 metallic object of measuring and controlling temp heating layer should have ferromagnetic property, can generate eddy current by electromagnetic induction
Heat occurs, meanwhile, magnetic conductivity and the temperature of this metallic object have metastable unidirectional linearity relationship, such electromagnetic induction to add
Thermal technology is likely to more easily measure the temperature of metallic object, and is controlled.It includes 35.5wt% that the present embodiment, which uses,
The dilval of the nickel of~36.0wt%, the iron of 63.5wt%~64.5wt%, and impurity less than 0.5wt%, thickness
For 0.3mm~0.6mm；
Applicant proposes the preferred embodiment of dilval with regard to this, as follows：
| The hundred of weight percent | Nickel | Iron | Impurity | Copper |
| Sample 1 | 35.8 | 63.75 | 0.45 | 0 |
| Sample 2 | 36 | 63.49 | 0.31 | 0.2 |
| Sample 3 | 35.5 | 64.34 | 0.01 | 0.15 |
| Sample 4 | 35.8 | 64.07 | 0.08 | 0.05 |
| Sample 5 | 35.5 | 63.78 | 0.23 | 0.49 |
Wherein, addition copper is to aid in improvement corrosion resistance, but content is only limitted to 0.5wt% or less (at this point, the content of iron
For 63.0wt%~64.5wt%), it can also be not added with, such corrosion resistance can be almost；It is formulated out according to above table
The material as measuring and controlling temp heating layer 201, it is also necessary to be heat-treated, i.e., make alloy material from horse by heating, cooling down
Family name's body is converted into austenite, switchs to soft magnetic materials from hard magnetic material, and also to control temperature and time during heat treatment,
The effect of nano-crystallization is played, can just accomplish material settling out and magnetic property consistency and other effects in this way, it is suitable thus to also obtain
Maximum temperature limit point.In above-mentioned sample experiments, maximum temperature limitation point can ensure near 230 degree Celsius, up and down
No more than 10 degrees Celsius, this temperature be most of edible oil rise smoke temperature degree, the present invention by control dilval ingredient,
Especially smokeless barbecue is realized in the control of the ingredient of nickel.
Wherein, culinary applications layer 203 is made of stainless steel or aluminum alloy materials, and anti-sticking rust-proof coating 204 uses food
The adhesive of sanitation-grade is made.
Since the kelvin effect of high frequency alternating current determines that the sphere of action of em induced current is only in the table of metallic object
Face, according to the frequency of our present household cookware electromagnetic induction about from the point of view of the range of 20KHz~50KHz, kelvin effect is big
About in 0.5mm depth bounds, due to and the cost of 201 this alloy of measuring and controlling temp heating layer be far above common ferromagnetic material
, therefore it is processed into sheet metal, and thickness is determined between 0.3mm~0.6mm, ensure effect while saving cost.
Further, in another embodiment, it is to realize heating and temperature control using electromagnetic induction heating principle in conjunction with Fig. 1
's.In other words, electromagnetic induction heating system is to send out electromagnetic wave using inductance coil to give metallic object heating, and this inductance coil
Inductance value variation can measure the magnetic conductivity variation of metallic object indirectly again, to measure the temperature of metallic object indirectly
Degree can detect temperature by detecting magnetic conductivity variation in this way, and realization is controlled with temperature and substitutes power control, is had more preferable
The culinary art effect of effect；
Heated base includes being used to support the support device 110 of baking tray 200 and for generating alternating magnetic field when being powered
So that measuring and controlling temp heating layer 201 generate heat inductance coil disk 101, it is in parallel with the inductance coil disk 101 for composition LC
The resonant capacitor 102 of resonance circuit, the resonant frequency for adjusting LC resonance circuit according to 201 material of measuring and controlling temp heating layer
Resonance synchronous detection unit 103, pass through high-speed counter detect LC resonance circuit resonant frequencies transfer resonant transfer detection
Unit 104, and for shifting the arithmetic processor 107 for calculating 201 temperature of measuring and controlling temp heating layer according to resonant frequency.Also wrap
The electromagnetic induction heating switching device 108 for providing driving current to LC resonance circuit is included, and is added respectively with electromagnetic induction
Thermal switch device 108 is connected with arithmetic processor 107, controls electromagnetism sense for receiving the control signal of arithmetic processor 107
Answer the electromagnetic switch driving unit 109 for the driving current size that heater switch device 108 provided.The arithmetic processor 107
It is connected between inductance coil disk 101 for detecting the electromagnetic induction waveform of LC resonance circuit to protect LC resonance circuit safety
Electromagnetic waveforms detection unit；Electromagnetic waveforms detection unit includes the resonance current of the resonance current for detecting LC resonance circuit
Detection unit 105 and energy balance detection unit 106 for detecting LC resonance output power of circuit.
Wherein, using high-speed counter while electromagnetic induction heating system works.MCU core with high speed calculator
Piece on-line checking goes out the slight transfer of resonant frequency, to learn the slight change of inductance value, then and extrapolates quality of materials, body
Long-pending, magnetic conductivity and temperature variation numerical value can precisely measure out metal in the case where determining quality of materials, volume
The real time temperature of piece, its advantage is that response quickly, high certainty of measurement.It can make the work of electromagnetic induction heating system from the root cause
The soft perfection of waveform can so that deteriorating phenomenon because of the inconsistent thermal effect brought of material characteristic no longer occurs in this way, to
Fundamentally solves the problems such as noise, switching device damage.
Wherein, annular groove 112 is offered in support device 110, inductance coil disk 101 is arranged in annular groove 112.Work as branch
When support arrangement 110 supports baking tray 200, the distance between measuring and controlling temp heating layer 201 and inductance coil disk 101 are 6mm~12mm.
The electromagnetic induction roasting cooking utensils research of the present invention can be such that food materials bake in the case of edible oil not smoke, but
It is unlikely to the fired temperature for keeping food materials cooked-on.The core material formula and heat for being heated to baking tray in alternating magnetic field are studied again
Treatment process makes the relative permeability low spot of the magnetic core be near the food highest fired temperature studied, in this way, real
The now purpose of limitation baking tray barbecue maximum temperature, and can be in maximum temperature certain temperature range interval selection multiple spot temperature below
Degree control.The electromagnetic induction roasting cooking utensils of the present invention are ingenious in design, highly practical.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (10)
1. a kind of electromagnetic induction roasting cooking utensils, which is characterized in that including baking tray (200) and heated base；Baking tray (200) packet
Include the heat-conducting metal layer (202) for constituting container shapes and the measuring and controlling temp being attached on heat-conducting metal layer (202) heating
Layer (201)；The measuring and controlling temp heating layer (201) using the nickel for including 35.5wt%~36.0wt%, 63.5wt%~
The iron of 64.5wt%, and dilval that impurity less than 0.5wt% is constituted, thickness is 0.3mm~0.6mm；
The heated base includes the support device (110) for being used to support baking tray (200), for generating alternating magnetic field when being powered
So that measuring and controlling temp heating layer (201) fever inductance coil disk (101), it is in parallel with inductance coil disk (101) for composition
The resonant capacitor (102) of LC resonance circuit is used to adjust the humorous of LC resonance circuit according to measuring and controlling temp heating layer (201) material
The resonance synchronous detection unit (103) of vibration frequency is shifted for detecting the resonant frequency of LC resonance circuit by high-speed counter
Resonant transfer detection unit (104) and calculate measuring and controlling temp heating layer (201) temperature for being shifted according to resonant frequency
Arithmetic processor (107).
2. electromagnetic induction roasting cooking utensils according to claim 1, which is characterized in that support device offers ring on (110)
Shape slot (112)；Inductance coil disk (101) is arranged in annular groove (112).
3. electromagnetic induction roasting cooking utensils according to claim 1, which is characterized in that measuring and controlling temp heating layer (201) also wraps
The copper less than 0.5wt% is included, at this point, the content of iron is 63.0wt%~64.5wt%.
4. electromagnetic induction roasting cooking utensils according to claim 1, which is characterized in that when support device (110) supports baking tray
(200) when, the distance between measuring and controlling temp heating layer (201) and inductance coil disk (101) are 6mm~12mm.
5. electromagnetic induction roasting cooking utensils according to claim 2, which is characterized in that further include for being carried to LC resonance circuit
For the electromagnetic induction heating switching device (108) of driving current, and respectively with electromagnetic induction heating switching device (108) and fortune
Processor (107) is calculated to be connected, control electromagnetic induction heating switching device for receiving the control signal of arithmetic processor (107)
(108) the electromagnetic switch driving unit (109) of the driving current size provided.
6. electromagnetic induction roasting cooking utensils according to claim 5, which is characterized in that arithmetic processor (107) and inductor wire
It is connected between circle disk (101) for detecting the electromagnetic induction waveform of LC resonance circuit to protect the electromagnetism of LC resonance circuit safety
Waveform detecting unit；Electromagnetic waveforms detection unit includes that the resonance current detection of the resonance current for detecting LC resonance circuit is single
First (105) and the energy balance detection unit (106) for detecting LC resonance output power of circuit.
7. the electromagnetic induction roasting cooking utensils according to any one of claim 1-6, which is characterized in that the measuring and controlling temp
Heating layer (201) is located at heat-conducting metal layer (202) bottom, and heat-conducting metal layer (202) thickness is 2mm~10mm；Baking tray (200) is also
Including the culinary applications layer (203) being attached to successively on the inside of heat-conducting metal layer (202) and anti-sticking rust-proof coating (204).
8. electromagnetic induction roasting cooking utensils according to claim 7, which is characterized in that culinary applications layer (203) is using stainless
Steel or aluminum alloy materials are made.
9. electromagnetic induction roasting cooking utensils according to claim 7, which is characterized in that the heat-conducting metal layer (202) includes
At least aluminium material layer of the copper material layer of 2mm thickness or at least 3mm thickness.
10. electromagnetic induction roasting cooking utensils according to claim 7, which is characterized in that the anti-sticking rust-proof coating (204) is adopted
It is made of the adhesive of foodstuff sanitation-stage.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113662279A (en) * | 2021-08-27 | 2021-11-19 | 武汉理工大学 | Electromagnetic induction type heating smoking set for heating non-burning tobacco products |
| US11576235B2 (en) * | 2019-06-14 | 2023-02-07 | The Boeing Company | Induction cookware with bi-metallic smart susceptor |
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Application publication date: 20180731 |