CN207532276U - A kind of electromagnetic induction heating cooker of low temperature culinary art - Google Patents
A kind of electromagnetic induction heating cooker of low temperature culinary art Download PDFInfo
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- CN207532276U CN207532276U CN201720261847.4U CN201720261847U CN207532276U CN 207532276 U CN207532276 U CN 207532276U CN 201720261847 U CN201720261847 U CN 201720261847U CN 207532276 U CN207532276 U CN 207532276U
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 17
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Induction Heating Cooking Devices (AREA)
- Cookers (AREA)
Abstract
A kind of electromagnetic induction heating cooker of low temperature culinary art, including cooking-vessel (200) and electromagnetic heating apparatus；The cooking-vessel (200) includes the measuring and controlling temp heating layer (201) that is used to form the heat-conducting metal layer (202) of container shapes and is attached on heat-conducting metal layer (202)；The measuring and controlling temp heating layer (201) uses the dilval of the nickel for including 29.5wt%, the iron of 70.0wt%~70.5wt% and the impurity less than 0.5wt%.The electromagnetic induction heating cooker designs of the utility model are ingenious, highly practical, are particularly suitable for the low temperature culinary art comprising fluid and/or food in container.
Description
Technical field
The utility model is related to cooker fields more particularly to one kind to have stability and higher temperatures control precision, can be fast
The electromagnetic induction heating cooker of the low temperature culinary art of speed heat dissipation.
Background technology
Existing electromagnetic induction heating cooker lacks effective control to cookware temperature, heating food materials (especially need into
The food materials of row low-temperature heat, such as milk, honey) when, the heating temperature provided is significantly larger than the required heating temperature of food materials
Degree, can destroy distinctive nutriment in food materials.With regard to this, CN201320740772X proposes a kind of electromagnetic heating cooking utensil,
It senses cookware actual temperature by temperature controller, so as to adjust heating power, improves effect of cooking.But temperature controller
It can be influenced by magnetic field induction, the true temperature of cookware can not be sensed.On the other hand, the problem of temperature controller is maximum is：Its
Temperature controller can use indirect control, and principle is come to power control, effect is unsatisfactory based on temperature sensor.Recently
There is patent to speak of the idea using curie point control electromagnetic induction cookware peak temperature, solve and reach certain temperature no longer
The problem of continuing heating, but without solving the test problems to temperature before this limit point very well, temperature control reliability is low, noise
Greatly, therefore in these years corresponding electromagnetic induction heating system, never obtains extraordinary popularization.
Low temperature cooks such as vacuum low-temperature cooking method, is to pack food or the closely knit packet of preservative film with the method that vacuumizes
Dress, is then placed in stirred type thermostat water bath, with 65 degree or so of low temperature cooking food, temperature used in different food with
Time is different, and advantage is can to reduce the loss of food moisture and weight.The wherein temperature principle of food low temperature culinary art
It should be equal to or more than 65 degree for upper, to be sterilized.Because the ideal temperature of the existence of bacterium is 4-65 degree.It is and true
Empty low temperature culinary art is preferably not more than 70 degree, to reduce the loss of moisture and taste.But the temperature required by different food
It is different with the time.And the prior art may insure that low temperature especially ensures in entire cooking process not without providing one kind
It can be more than the cooker of the electromagnetic induction heating of specific low temperature.
In addition, when feeding the baby with milk, the temperature of milk is generally required in 40 DEG C or so；It is easy to adjust at home
The temperature of milk；And outdoors under the conditions of, it is difficult to ensure that milk, which is in, is most suitable for the temperature drunk of baby.If it is capable of providing one
The portable low-temperature heat cooker of kind, just can well solve the problem；However, enable heating cooker portable
Key is heat dissipation problem, it is understood that, hot heating cooker is difficult to carry.And current existing low-temperature heat cooker, generally all
It is to be radiated using natural cooling method, radiating rate is slow.
Utility model content
The utility model has stability and higher temperatures control precision in view of the above-mentioned problems, proposing one kind, can be quick
The electromagnetic induction heating cooker of the low temperature culinary art of heat dissipation.
The utility model proposes technical solution it is as follows：
The utility model proposes a kind of electromagnetic induction heating cooker of low temperature culinary art, including cooking-vessel and electromagnetism
Heating equipment；The cooking-vessel includes the survey for forming the heat-conducting metal layer of container shapes and being attached on heat-conducting metal layer
Control temp heating layer；The measuring and controlling temp heating layer, which uses, includes the nickel of 29.5wt%, the iron of 70.0wt%~70.5wt% with
And the dilval of the impurity less than 0.5wt%；
The electromagnetic heating apparatus include be used to support cooking-vessel support device, for be powered when generate alternation magnetic
So that measuring and controlling temp heating layer fever inductance coil disk, it is in parallel with inductance coil disk for composition LC resonance circuit it is humorous
Shake capacitor, the resonance synchronization detection list for the resonant frequency according to measuring and controlling temp heating layer material adjustment LC resonance circuit
Member, for by high-speed counter detect LC resonance circuit resonant frequency shift resonant transfer detection unit and for root
The arithmetic processor for calculating measuring and controlling temp heating layer temperature is shifted according to resonant frequency；
Electromagnetic heating apparatus further includes automatically controlled mainboard；Resonant capacitor, resonance synchronous detection unit, resonant transfer detection are single
Member and arithmetic processor are arranged on automatically controlled mainboard；
The support device includes bottom case and is used to support the face-piece of cooking-vessel, and the electromagnetic heating apparatus further includes
The wind path wall being arranged between bottom case and inductance coil disk；Inductance coil disk, bottom case and wind path wall surround air duct；Face-piece and bottom case
It fastens to cover inductance coil disk and wind path wall；The electromagnetic heating apparatus, which further includes, to be arranged in air duct, for inductor wire
Enclose disk and the wind turbine of automatically controlled mainboard heat dissipation.
In the above-mentioned electromagnetic induction heating cooker of the utility model, wind path wall is U-shaped, and blind end is from inductance coil disk one
Side is exposed, and bottom case offers through-hole using the air inlet as air duct in the corresponding position of wind path wall blind end；The opening of wind path wall
End forms the air outlet in air duct；Air inlet is provided with boom net, and assembling is in the downstream position positioned at boom net in air duct.
In the above-mentioned electromagnetic induction heating cooker of the utility model, inductance coil disk is arranged below support device；Support
The distance between supporting surface and inductance coil disk of device are 6mm~12mm.
In the above-mentioned electromagnetic induction heating cooker of the utility model, electromagnetic heating apparatus further includes to give LC resonance circuit
There is provided driving current electromagnetic induction heating switching device and respectively with electromagnetic induction heating switching device and arithmetic processor
It is connected, controls the driving current that electromagnetic induction heating switching device is provided big for receiving the control signal of arithmetic processor
Small electromagnetic switch driving unit.
In the above-mentioned electromagnetic induction heating cooker of the utility model, connected between arithmetic processor and inductance coil disk useful
In detection LC resonance circuit electromagnetic induction waveform to protect the electromagnetic waveforms detection unit of LC resonance circuit safety；Electromagnetic waveforms
Detection unit is including the resonance current detection unit for detecting the resonance current of LC resonance circuit and for detecting LC resonance electricity
The energy balance detection unit of road output power.
In the above-mentioned electromagnetic induction heating cooker of the utility model, measuring and controlling temp heating layer is arranged on the bottom of heat-conducting metal layer
Portion；Cooking-vessel further includes the culinary applications layer being attached to successively on the inside of heat-conducting metal layer and anti-sticking rust-proof coating.
In the above-mentioned electromagnetic induction heating cooker of the utility model, culinary applications layer uses stainless steel or aluminum alloy materials system
Into.
In the above-mentioned electromagnetic induction heating cooker of the utility model, the heat-conducting metal layer includes the copper of at least 1mm thickness
The aluminium material layer or at least 3 millimeters of cast iron layer of material layers or at least 2mm thickness.
In the above-mentioned electromagnetic induction heating cooker of the utility model, the anti-sticking rust-proof coating is using the anti-of foodstuff sanitation-stage
Viscous material is made.
In the above-mentioned electromagnetic induction heating cooker of the utility model, measuring and controlling temp heating layer, which additionally uses, accounts for dilval weight
Copper of the amount less than 0.5wt%, the content of iron is 69.5~70.5wt% at this time.
The utility model prevents metal widget from surprisingly falling into electromagnetic induction heating there are one being set in electromagnetic heating apparatus
By the mechanism of mistake heating, specific practice is when being less than (such as metal disc to a certain degree by the area of heating metallic object in region
Product diameter is less than 80mm) when, electromagnetism output can be automatically closed in electromagnetic heating apparatus, to prevent from being heated by mistake；Metal widget
Detection method be detect by heating metallic object and electromagnetic induction coil composition inductance value, wherein playing electricity by heating metallic object
Feel the effect of magnetic core, the inductance value that electromagnetic heating apparatus forms magnetic core with electromagnetic induction coil is detected, metal bulk area
It is big then inductance value is big, on the contrary the small then inductance value of metal bulk area is small.In fact when metal bulk area is constant, but its relative permeability
If there is a change, the inductance value that magnetic core is formed with coil can also change, effect generated with metallic object area change etc.
Together.Therefore when electromagnetic heating apparatus detection by heating metal bulk area it is small to a certain extent when can drastically weaken and be even switched off electromagnetism
Output detects small to certain numerical value, electromagnetic heating apparatus by the relative permeability of heating metallic object with electromagnetic heating apparatus
Can drastically weaken be even switched off electromagnetism output situation be equal.
The electromagnetic induction heating cooker of the utility model studies the relatively low food materials of heating temperature allowable to reduce food as far as possible
The forfeiture of nutriment in material, most temperature control threshold is determined as 90 DEG C at last.When temperature is in below temperature control threshold,
Nutriment in food materials will not be destroyed.The utility model is studied to heat to cooking-vessel in alternating magnetic field simultaneously again
Measuring and controlling temp heating layer alloy material formula, the alloy material of the measuring and controlling temp heating layer is equal in inductance coil disk
On magnetic core, select suitable alloy formula and heat treatment process that the relative permeability of the magnetic core is made to vary with temperature generation is corresponding
Variation, and the low value point of its relative permeability is made to be near the food temperature control threshold studied, work as cooking-vessel
When temperature is close to or up to temperature control threshold, becoming smaller for lc circuit inductance value is caused due to becoming smaller for magnetic core relative permeability
Then resonant frequency is caused to shift, electromagnetic heating apparatus detects that LC inductance values weaken close to threshold value just by resonant frequency transfer
It is controlled, the low value point of the relative permeability of the alloy material due to manufacturing measuring and controlling temp heating layer is determined, at this time electromagnetism
Heating equipment detects that the inductance value variation of coil panel is equal to the situation that the metal parts size heated is less than reasonable size,
Electromagnetic heating apparatus also can determine whether to be that the accident of metal widget is fallen into, i.e., electromagnetism output power is drastically weakened and even closed
It closes, the control of this electromagnetic heating apparatus had not only played the protective effect that metal widget is surprisingly fallen into, but also play limitation and cook
Adjust the effect of vessel temp.The utility model is detected metal widget using electromagnetic induction heating while control again to thermometric
The relative permeability variation of temperature control heating layer alloy material is detected, and plays temperature control, the function of preventing temperature over-range, this practicality
Novel electromagnetic induction heating cooker designs are ingenious, highly practical.The utility model from cost it is not high, be applicable in manufacture angularly go out
Hair finds the material for being suitble to measuring and controlling temp heating layer, and the utility model is using iron-nickel alloy, and iron is very cheap, and nickel is expensive, still
Content control is suitable all right, so as to which holistic cost be effectively controlled.The utility model is also by using wind turbine, Neng Goushi
Now to the rapid cooling of inductance coil disk, consequently facilitating the heat dissipation of electromagnetic induction heating cooker.
Description of the drawings
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing：
Fig. 1 shows the schematic diagram of the electromagnetic induction heating cooker of the utility model embodiment；
Fig. 2 shows the schematic diagrames of the cooking-vessel of electromagnetic induction heating cooker shown in FIG. 1；
Fig. 3 shows a kind of magnetic conductance of the dilval steel for the nickel containing 29.5wt% for being used to manufacture measuring and controlling temp heating layer
Rate-temperature map relationship measured drawing；
Fig. 4 shows the structure diagram of electromagnetic induction heating cooker shown in FIG. 1；
Fig. 5 shows another structure diagram of electromagnetic induction heating cooker shown in Fig. 4.
Specific embodiment
Technical problem to be solved in the utility model is：Existing electromagnetic induction heating cooker can not accomplish accurate temperature controlling
Low temperature culinary art can not be provided.The technical thought that the utility model is proposed with regard to the technical problem is：Research is in alternating magnetic field
In to cooking-vessel heating magnetic core material prescription, find attached in the permitted maximum heating temperature of low temperature culinary area food materials
Closely, magnetic conductivity approaches or reaches 0 core material.The magnetic core manufactured by the core material heats to limit to cooking-vessel
Temperature.
In order to make the technical purpose of the utility model, technical solution and technique effect apparent, in order to this field
Technical staff understands and implements the utility model, the utility model is done below in conjunction with the accompanying drawings and the specific embodiments further in detail
Thin explanation.
As depicted in figs. 1 and 2, Fig. 1 shows the schematic diagram of the electromagnetic induction heating cooker of the utility model embodiment.Figure
2 show the schematic diagram of the cooking-vessel of electromagnetic induction heating cooker shown in FIG. 1.Electromagnetic induction heating cooker is cooked for low temperature
It prepares food, including cooking-vessel 200；The cooking-vessel 200 includes forming the heat-conducting metal layer 202 of container shapes and being attached to
Measuring and controlling temp heating layer 201 on heat-conducting metal layer 202；In the present embodiment, measuring and controlling temp heating layer 201 is arranged on heat conduction gold
Belong to the bottom of layer 202；
It is appreciated that in other embodiments, measuring and controlling temp heating layer 201 can be arranged on the top of heat-conducting metal layer 202
Portion.The measuring and controlling temp heating layer 201 iron of 70.0wt%~70.5wt% and is less than using the nickel for including 29.5wt%
The dilval of the impurity of 0.5wt%；In order to keep the steady in a long-term of the dilval magnetic characteristic, wherein manganese, silicon, phosphorus, sulphur, carbon
Below 0.5wt% must be limited in etc. various total impurities；Specifically, with economic means obtain alloy permission impurity include 0~
0.4wt% manganese, 0~0.30wt% silicon, 0~0.020wt% phosphorus, 0~0.020wt% sulphur and 0~0.03wt% carbon；At this
In, measuring and controlling temp heating layer, which additionally uses, accounts for the copper that dilval weight is less than 0.5wt%.Addition copper is to aid in improving anticorrosive
Performance can also be not added with, and such corrosion resistance can be almost.Using the hardness of heat treatment process adjustment dilval, make this
Alloy has the characteristics that magnetic conductivity and temperature respective change and the corresponding relative permeability of its maximum temperature is made to influence inductance quantitative change
Change and approached with the numerical value of metal widget influence inductance value variation；Herein, electromagnetic induction heating cooker is further included for survey
Control temp heating layer 201 provides alternating magnetic field, the electromagnetic heating apparatus that it is made to generate corresponding alternating current and is heated up.At this
In, measuring and controlling temp heating layer 201 heats up, and can be heated by heat transfer to heat-conducting metal layer 202, so as to fulfill electromagnetic induction heating
The cooking function of cooker.Due to the restriction of the material component of measuring and controlling temp heating layer 201, measuring and controlling temp heating layer 201 is electric
Maximum temperature when magnetic heating equipment heats is limited in 90 DEG C or so.In this way, when the temperature of measuring and controlling temp heating layer 201 reaches 90
It can top out when near DEG C, so that the temperature of heat-conducting metal layer 202 is stopped near 90 DEG C.In addition, with reference to temperature control skill
Art can control the temperature of measuring and controlling temp heating layer 201 in the range of 40 DEG C~85 DEG C.
Further, electromagnetic heating apparatus includes being used to support the support device 110 for placing cooking-vessel 200 and setting
So that the inductance coil of the fever of measuring and controlling temp heating layer 201 below support device 110, for the generation alternating magnetic field when being powered
Disk 101；Electromagnetic heating apparatus further includes resonant capacitor for composition LC resonance circuit in parallel with inductance coil disk 101
102.The distance between supporting surface and inductance coil disk 101 of support device 110 are 6mm~12mm, in this way, working as cooking-vessel
200 when being placed on supporting surface 110, and measuring and controlling temp heating layer 201 forms inductor with inductance coil disk 101, and measuring and controlling temp adds
Thermosphere 201 becomes the magnetic core of inductor.The phenomenon that inductance coil disk 101 makes measuring and controlling temp heating layer 201 generate heat is to employ whirlpool
Heating principle is flowed, specifically, after inductance coil disk 101 is powered, 201 inside of measuring and controlling temp heating layer generates sensing electric current,
And thus send out resistance heat.In this course, inductance coil disk 101 realizes the non-contact thermal to cooking-vessel 200.
It is appreciated that the electric current for flowing through inductance coil disk 101 is alternating current.
Because the reasons such as the magnetic conductivity of 201 material of measuring and controlling temp heating layer, ferromagnetic property and electromagnetic induction waveform, common
Electromagnetic heating apparatus at work easily make us being difficult to the multiple clutter noise born by generation, in order to make electromagnetic heating apparatus more
It is suitble to the electromagnetic induction performance of 201 material of measuring and controlling temp heating layer of the present embodiment, avoids the hair of multiple harmonic, clutter noise
Raw, the resonant frequency of the LC resonance circuit of the present embodiment is designed in more than 40KHz；Meanwhile electromagnetic heating apparatus further includes and electricity
Feel the connection of 101 one end of coil panel, for the humorous of the resonant frequency according to 201 material of measuring and controlling temp heating layer adjustment LC resonance circuit
Shake synchronous detection unit 103, is connect with 101 other end of inductance coil disk, for by high-speed counter detection LC resonance circuit
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 the arithmetic processor according to resonant frequency transfer calculating measuring and controlling temp heating layer (201) temperature
107.Herein, Fig. 3 is may refer to, when 201 temperature of measuring and controlling temp heating layer is changed by room temperature to its material Curie point, relatively
Variation from big to small can also occur for magnetic permeability value, and the resonant frequency of LC resonance circuit can also occur to shift variation accordingly.
Fig. 3 shows a kind of magnetic of the dilval steel for the nickel containing 29.5wt% for being used to manufacture measuring and controlling temp heating layer 201
Conductance-temperature map relationship measured drawing, the material component of the dilval steel are 29.5wt% nickel, 0.4wt% manganese, 0.05wt%
Silicon, 0.010wt% phosphorus, 0.01wt% sulphur, 0.02wt% carbon, 0.4wt% copper and 69.61wt% iron.It can be seen that this nickel
The magnetic conductivity of ferroalloy steel is reduced with the raising of temperature, and when temperature is near 90 DEG C, the magnetic conductivity of dilval steel approaches
Be 0, at this point, magnetic induction density B s values drastically become smaller, in measuring and controlling temp heating layer 201 because electromagnetic intensity drastically under
Drop, electromagnetic induction heating effect drastically weaken or even lose completely, and cooking-vessel is automatically into thermostatic control state at this time.
Further, in the present embodiment, cooking-vessel 200 further includes is attached to 202 inside of heat-conducting metal layer successively
Culinary applications layer 203 and anti-sticking rust-proof coating 204.Herein, 202 generally use metallic copper of heat-conducting metal layer or metal aluminum
Into since low temperature cooking container is mostly comprising water liquid, heat conduction is preferable, and can suitably reduce will to the thermal conductivity of heat-conducting metal layer
It asks, therefore heat-conducting metal layer can also be done using other metal materials (such as cast iron, as long as dilval can adhere to)
202, because the rustless property of metallic copper and metallic aluminium, sanitation performance are not fine, it may be considered that in the inside of cooking-vessel 200
Layer of material is set up, forms the culinary applications layer 203.Usually, culinary applications layer 203 uses stainless steel or aluminum alloy materials
It is made, since low temperature cooking container is mostly comprising water liquid, heat conduction is preferable, therefore can also use other materials；It is anti-sticking anti-
Become rusty adhesive of the coating 204 using foodstuff sanitation-stage, is used to implement hygienic and not viscous characteristic, such as uses polytetrafluoroethylene (PTFE)
(Polytetrafluoroethylene) or silica (Silox, Monox), the characteristic that cannot be used to implement viscously.
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；
f0Resonant frequency for LC resonance circuit；
N is the number of turn of inductance coil disk 101；
K is k-factor, and the ratio of radius R and its length l depending on inductance coil disk 101 are 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, f0Resonant frequency for 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；
μsRelative permeability for 201 material of measuring and controlling temp heating layer；
N is the number of turn 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, and the ratio of radius R and its length l depending on 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 μs。
For the material of measuring and controlling temp heating layer 201, when temperature is below its curie point, relative permeability μsWith temperature
T existence function relationship f are spent, it is similar as shown in Figure 3；In this way, the relative permeability μ of the material of measuring and controlling temp heating layer 201sWith temperature
The functional relation of degree T can be expressed as：
μs=f (T)； (3)
By formula (1), (2) and (3), the calculation formula of above-mentioned 201 temperature T of 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.).
Electromagnetic heating apparatus further includes the electromagnetic induction heating switching device for providing driving current to LC resonance circuit
108 and it is connected respectively with electromagnetic induction heating switching device 108 and arithmetic processor 107, for receiving arithmetic processor
107 control signal drives come the electromagnetic switch of driving current size that electromagnetic induction heating switching device 108 is controlled to be provided
Unit 109.
Further, in electromagnetic induction heating work, temperature change causes magnetic conductivity to change, the resonance of LC resonance circuit
Frequency shifts, and electromagnetic induction effect and eddy current effects, which change, will influence electromagnetic waveforms variation, sometimes electromagnetic wave
The pernicious variation of shape can cause working performance to decline, and decline including efficiency, noise increase, electromagnetic induction is even caused when serious
The damage of heating equipment.In the present embodiment, it is connected with to detect LC between arithmetic processor 107 and inductance coil disk 101
The electromagnetic induction waveform of resonance circuit, and the canceration of electromagnetic induction waveform is controlled to thereby protect the electromagnetic wave of LC resonance circuit safety
Shape detection unit, specifically, electromagnetic waveforms detection unit include for detect LC resonance circuit resonance current resonance current
Detection unit 105 and the energy balance detection unit 106 for detecting LC resonance output power of circuit.It is detected by energy balance
Unit 106 when detecting that LC resonance output power of circuit reaches threshold value, issues warning signal；Arithmetic processor 107 is used for
After receiving pre-warning signal, inductance coil is broken by electromagnetic switch driving unit 109 and electromagnetic induction heating switching device 108
The power supply of disk 101.In addition, by arithmetic processor 107 to resonant transfer detection unit 104,105 and of resonance current detection unit
The processing of the detection data of energy balance detection unit 106, can reach cooks cooking cook ware progress controlled heat, constant temperature
Effect.
In another embodiment, with reference to Fig. 2, cooking-vessel 200 can be processed into circular discs or other shapes, it is desirable that can be with
It holds by heating food, the material of cooking-vessel 200 should can be with electromagnetic heating, in the present embodiment, in cooking-vessel
In 200, heat-conducting metal layer 202 and heat-conducting metal layer 202 are combined together, and hot high pressure welding method knot may be used in two kinds of materials
Close, such as using soldering, low temperature pressing when it is certain it is noted that accomplish that contact is good, in order to avoid because mechanical shock and expand with heat and contract with cold
Reason changes, so as to influence heating or heat-conducting effect.
Wherein, heat-conducting metal layer 202 is used to form container shapes and contact and heat conduction by heating food.Measuring and controlling temp heats
Layer 201 is arranged on the bottom of heat-conducting metal layer 202, and 202 thickness of heat-conducting metal layer is 1mm~10mm；Cooking-vessel 200 further includes
It is attached to the culinary applications layer 203 and anti-sticking rust-proof coating 204 of 202 inside of heat-conducting metal layer successively.
Wherein, heat-conducting metal layer 202 includes the copper material layer of at least 1mm thickness, another selection is at least 2mm 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 utility model embodiment, the copper material bed of material at least wants 1mm thickness, and layer of aluminum at least wants 2mm thickness, cast iron materials layer at least 3
Mm of thickness.
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, and such electromagnetic induction adds
Thermal technology is likely to more easily measure the temperature of metallic object, and is controlled.
Culinary applications layer 203 is made of stainless steel or aluminum alloy materials, and anti-sticking rust-proof coating 204 uses foodstuff sanitation-stage
Adhesive be 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 is far above common ferromagnetic material
, therefore sheet metal is processed into, and determine thickness between 0.3mm~0.6mm, cost is saved simultaneously in guarantee effect.
Further, in another embodiment, it is to realize heating and temperature control using electromagnetic induction heating principle with reference to Fig. 1
's.In other words, electromagnetic induction heating system is to send out electromagnetic wave using inductance coil to heat to metallic object, and this inductance coil
Inductance value variation can measure the magnetic conductivity variation of metallic object indirectly again, so as 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；
Electromagnetic heating apparatus includes being used to support the support device 110 of cooking-vessel 200 and for generating when being powered
Alternating magnetic field 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 with
In the resonant capacitor 102 for forming LC resonance circuit, for adjusting LC resonance circuit according to 201 material of measuring and controlling temp heating layer
The resonance synchronous detection unit 103 of resonant frequency detects the resonance of LC resonance circuit resonant frequencies transfer by high-speed counter
Shift detection unit 104 and for shifting the arithmetic processor for calculating 201 temperature of measuring and controlling temp heating layer according to resonant frequency
107.Further include for LC resonance circuit provide driving current electromagnetic induction heating switching device 108 and respectively with electricity
Magnetic induction heater switch device 108 is connected with arithmetic processor 107, is controlled for receiving the control signal of arithmetic processor 107
The electromagnetic switch driving unit 109 for the driving current size that electromagnetic induction heating switching device 108 processed is provided.At the operation
It is connected with to detect the electromagnetic induction waveform of LC resonance circuit to protect LC resonance between reason device 107 and inductance coil disk 101
The electromagnetic waveforms detection unit of circuit safety；Electromagnetic waveforms detection unit includes the resonance current for detecting LC resonance circuit
Resonance current detection unit 105 and the 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, so as to learn the slight change of inductance value, then and extrapolate quality of materials, body
The variation numerical value of product, magnetic conductivity and temperature, in the case where determining quality of materials, volume, can precisely measure out metal
The real time temperature of piece, advantage are in response to quick, high certainty of measurement.It can make the work of electromagnetic induction heating system from root
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, so as to
Fundamentally solves the problems such as noise, switching device damage.
Further, electromagnetic heating apparatus further includes automatically controlled mainboard 4c；Resonant capacitor 102, resonance synchronous detection unit
103rd, resonant transfer detection unit 104, arithmetic processor 107, electromagnetic induction heating switching device 108, electromagnetic switch driving are single
Member 109, resonance current detection unit 105 and energy balance detection unit 106 are arranged on automatically controlled mainboard 4c；
As shown in Figure 4 and Figure 5, the support device 110 includes bottom case 3 and is used to support the face-piece of cooking-vessel 200
2, the electromagnetic heating apparatus further includes the wind path wall being arranged between bottom case 3 and inductance coil disk 101；Inductance coil disk 101,
Bottom case 3 and wind path wall surround air duct；Face-piece 2 and bottom case 3 fasten to cover inductance coil disk 101 and wind path wall；The electromagnetism adds
Hot equipment, which further includes, to be arranged in air duct, for the wind turbine 4a to inductance coil disk 101 and automatically controlled mainboard 4c heat dissipations.
Further, as shown in figure 4, face-piece 2 includes the plastic parts 2a for forming 2 shape of face-piece, it is attached at plastic parts
The micro-crystal plate 2b of 2a top surfaces and four non-slipping block 2c for being separately positioned on the quadrangle of face-piece 2 and surrounding micro-crystal plate 2b.
In the present embodiment, by non-slipping block 2c, on the one hand micro-crystal plate 2b can be locked, on the other hand can prevent cooking-vessel 200
It is slid from micro-crystal plate 2b.When face-piece 2 supports cooking-vessel 200, measuring and controlling temp heating layer 201 on cooking-vessel 200 with
The distance between inductance coil disk 101 is 6mm~12mm.
And when cooking-vessel 200 is larger, non-slipping block 2c can also play the role of supporting cooking-vessel 200, at this
When, cooking-vessel 200 and micro-crystal plate are separated out gap, and electromagnetic heating apparatus realizes the effect for the heating that suspends.Non-slipping block 2c can be adopted
With silicon rubber and/or plastics and/or bakelite and/or metal aluminum alloy material manufacture.
The control lamp plate 2e that electromagnetic heating apparatus is further included mounted on 2 side of face-piece and is electrically connected with automatically controlled mainboard 4c,
The button cap 2d for triggering the control that automatically controlled mainboard 4c is powered to inductance coil disk 101 is provided on control lamp plate 2e.It can
With understanding, the different control modes being powered by the automatically controlled mainboard 4c of button cap 2d triggerings to inductance coil disk 101, control lamp plate 2e
On signaling lamp can make corresponding lamp effect.
Further, electromagnetic heating apparatus further include be removably disposed in 3 bottom four corners of bottom case increase under-chassis 5, use
Family can increase under-chassis according to usage scenario, voluntarily installation.Increase the elasticity that under-chassis utilizes plastic material, make to increase under-chassis inner wall with
Outer wall tight fit at the under-chassis of bottom case, to realize fixation.
Further, be formed with multiple mounting posts on 3 top surface of bottom case, inductance coil disk 101 by screw respectively with it is multiple
Mounting post is fixedly connected；In this way, it is separated out space between inductance coil disk 101 and bottom case 3.
Wind path wall is U-shaped, and blind end exposes from 101 side of inductance coil disk, and bottom case 3 is in the correspondence of wind path wall blind end
Position offers through-hole using the air inlet 3b as air duct；The openend of wind path wall forms the air outlet in air duct；At air inlet 3b
Boom net 3a is provided with, wind turbine 4a is mounted on the downstream position positioned at boom net 3a in air duct.Herein, boom net 3a is for real
Now catch the effect of dust.
In the present embodiment, wind path wall include form its blind end the first wind path wall section and respectively with the first air duct
The the second wind path wall section and third wind path wall section of wall section both sides connection.
The electromagnetic induction heating cooker of the utility model, by studying for being heated in alternating magnetic field to cooking-vessel
The material prescription of magnetic core, find suitable for low temperature cook, near the permitted maximum heating temperature of food materials, magnetic conductivity approach or
Reach 0 core material.The magnetic core manufactured by the core material limits the temperature heated to cooking-vessel, prevents some foods
Material loses nutritional ingredient at high temperature.The utility model also by using wind turbine, can be realized and the quick of inductance coil disk is dissipated
Heat, consequently facilitating the heat dissipation of electromagnetic induction heating cooker.The electromagnetic induction heating cooker designs of the utility model are ingenious, practicability
By force.
It should be understood that for those of ordinary skills, can be improved or converted according to the above description,
And all these modifications and variations should all belong to the protection domain of the appended claims for the utility model.
Claims (10)
1. a kind of electromagnetic induction heating cooker of low temperature culinary art, including cooking-vessel (200) and electromagnetic heating apparatus；This is cooked
Capacity transfer device (200) is including being used to form the heat-conducting metal layer (202) of container shapes and being attached on heat-conducting metal layer (202)
Measuring and controlling temp heating layer (201)；The measuring and controlling temp heating layer (201) using the nickel for including 29.5wt%, 70.0wt%~
The dilval of the iron of 70.5wt% and impurity less than 0.5wt%；It is characterized in that,
The electromagnetic heating apparatus include be used to support cooking-vessel (200) support device (110), for be powered when generate
Alternating magnetic field so that measuring and controlling temp heating layer (201) fever inductance coil disk (101), it is in parallel with inductance coil disk (101) with
For forming the resonant capacitor of LC resonance circuit (102), for according to measuring and controlling temp heating layer (201) material adjustment LC resonance
The resonance synchronous detection unit (103) of the resonant frequency of circuit, the resonance for detecting LC resonance circuit by high-speed counter
The resonant transfer detection unit (104) of frequency translation and for according to resonant frequency shift calculate measuring and controlling temp heating layer
(201) arithmetic processor (107) of temperature；
Electromagnetic heating apparatus further includes automatically controlled mainboard (4c)；Resonant capacitor (102), resonance synchronous detection unit (103), resonance
Transfer detection unit (104) and arithmetic processor (107) are arranged on automatically controlled mainboard (4c)；
The support device (110) is including bottom case (3) and is used to support the face-pieces (2) of cooking-vessel (200), and the electromagnetism adds
Hot equipment further includes the wind path wall being arranged between bottom case (3) and inductance coil disk (101)；Inductance coil disk (101), bottom case
(3) and wind path wall surrounds air duct；Face-piece (2) and bottom case (3) fasten to cover inductance coil disk (101) and wind path wall；The electricity
Magnetic heating equipment, which further includes, to be arranged in air duct, for the wind turbine to inductance coil disk (101) and automatically controlled mainboard (4c) heat dissipation
(4a)。
2. electromagnetic induction heating cooker according to claim 1, which is characterized in that wind path wall is U-shaped, and blind end is from electricity
Feel coil panel (101) side expose, bottom case (3) the corresponding position of wind path wall blind end offer through-hole using as air duct into
Air port (3b)；The openend of wind path wall forms the air outlet in air duct；Boom net (3a), wind turbine (4a) are provided at air inlet (3b)
The downstream position positioned at boom net (3a) mounted on air duct.
3. electromagnetic induction heating cooker according to claim 1, which is characterized in that inductance coil disk (101) is arranged on branch
Below support arrangement (110)；The distance between supporting surface and inductance coil disk (101) of support device (110) are 6mm~12mm.
4. electromagnetic induction heating cooker according to claim 1, which is characterized in that electromagnetic heating apparatus further include for
LC resonance circuit provides the electromagnetic induction heating switching device (108) of driving current and is switched respectively with electromagnetic induction heating
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) of driving current size that heater switch device (108) is provided.
5. electromagnetic induction heating cooker according to claim 4, which is characterized in that arithmetic processor (107) and inductor wire
It is connected with to detect the electromagnetic induction waveform of LC resonance circuit to protect the electromagnetism of LC resonance circuit safety between circle disk (101)
Waveform detecting unit；Electromagnetic waveforms detection unit includes detecting list for detecting the resonance current of the resonance current of LC resonance circuit
First (105) and the energy balance detection unit (106) for detecting LC resonance output power of circuit.
6. electromagnetic induction heating cooker according to claim 1, which is characterized in that measuring and controlling temp heating layer (201) is set
In the bottom of heat-conducting metal layer (202)；Cooking-vessel (200) further includes is attached to cooking on the inside of heat-conducting metal layer (202) successively
Adjust application layer (203) and anti-sticking rust-proof coating (204).
7. electromagnetic induction heating cooker according to claim 6, which is characterized in that culinary applications layer (203) is using stainless
Steel or aluminum alloy materials are made.
8. electromagnetic induction heating cooker according to claim 6, which is characterized in that the heat-conducting metal layer (202) includes
At least the copper material layer of 1mm thickness or at least cast iron layer of the aluminium material layer of 2mm thickness or at least 3mm thickness.
9. electromagnetic induction heating cooker according to claim 6, which is characterized in that the anti-sticking rust-proof coating (204) is adopted
It is made of the adhesive of foodstuff sanitation-stage.
10. the electromagnetic induction heating cooker according to any one of claim 1-9, which is characterized in that measuring and controlling temp adds
Thermosphere (201) includes copper, and content is less than the copper of 0.5wt%, at this point, the content of iron is 69.5~70.5wt%.
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| CN110811297A (en) * | 2019-11-20 | 2020-02-21 | 中惠创智（深圳）无线供电技术有限公司 | Dry burning prevention cooker |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110811297A (en) * | 2019-11-20 | 2020-02-21 | 中惠创智（深圳）无线供电技术有限公司 | Dry burning prevention cooker |
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