CN106136836B - For the composite coating of electromagnetic oven cooker, electromagnetic oven cooker and preparation method thereof - Google Patents
For the composite coating of electromagnetic oven cooker, electromagnetic oven cooker and preparation method thereof Download PDFInfo
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- CN106136836B CN106136836B CN201510129053.8A CN201510129053A CN106136836B CN 106136836 B CN106136836 B CN 106136836B CN 201510129053 A CN201510129053 A CN 201510129053A CN 106136836 B CN106136836 B CN 106136836B
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Abstract
The invention proposes composite coating, the electromagnetic oven cookers and preparation method thereof for electromagnetic oven cooker.According to an embodiment of the invention, the composite coating for electromagnetic oven cooker includes: the first conductive layer；Magnetic layer, the magnetic layer are formed in the lower surface of first conductive layer；And second conductive layer, second conductive layer are formed in the lower surface of the magnetic layer.When the composite coating of embodiment according to the present invention is applied to electromagnetic oven cooker, the heating power of electromagnetic oven cooker can be improved or improve the stability of power when in use.
Description
Technical field
The present invention relates to household appliance technical field, more particularly to for electromagnetic oven cooker composite coating, have this compound
The electromagnetic oven cooker of coating and the method for preparing the electromagnetic oven cooker.
Background technique
Electromagnetic oven is a kind of common cooker heated using electromagnetic induction principle to food, typically, electromagnetic oven
Boiler face be heat-stable ceramic plate, under the action of alternating current, the coil below ceramic wafer, which is arranged in, can generate magnetic field, further
The magnetic line of force in magnetic field can generate vortex when passing through the cookware bottom with ferromagnetic property, so that the bottom of a pan generates heat rapidly,
Achieve the purpose that heat food.Therefore, the cookware that electromagnetic oven uses at present is all made of ferromagnetic material, such as iron, stainless steel.
Ceramic cooker is stablized as green product, chemical property, is not easy to cause chemical reaction, and ceramic cooker passes
Hot fast, heat dissipation slowly, effectively reduces distributing for heat, the firepower of very little can meet the needs of the cooking.However, due to ceramics
Material does not have ferromagnetic property, and it is dfficult to apply in electromagnetic oven.Currently, in order to which ceramic cooker to be applied in electromagnetic oven,
It needs in one layer of magnetic conductive film of ceramic watch face paste, however, the complex manufacturing process of the magnetic conductive film, and generally use this method production
Ceramic pan heating power it is lower, power when use is also unstable.
Therefore, current electromagnetic oven cooker still has much room for improvement.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
In the first aspect of the invention, the invention proposes a kind of composite coatings for electromagnetic oven cooker.According to this
The embodiment of invention, the composite coating for being used for electromagnetic oven cooker include: the first conductive layer；Magnetic layer, the magnetic layer are formed
In the lower surface of first conductive layer；And second conductive layer, second conductive layer are formed in the following table of the magnetic layer
Face.When the composite coating of embodiment according to the present invention is applied to electromagnetic oven cooker, adding for electromagnetic oven cooker can be improved
Especially heating power or the raising of ceramic cooker can be improved in thermal power or the stability for improving power when in use
The stability of power when in use.
In the second aspect of the present invention, the invention proposes a kind of electromagnetic oven cookers.According to an embodiment of the invention, the electricity
Magnetic furnace cookware includes: pot body, and at least part of the pot body is formed by ceramics；Composite coating, the composite coating shape
At least part of pot body lower surface described in Cheng Yu, and the composite coating is to be described previously for answering for electromagnetic oven cooker
Close coating.As previously mentioned, electricity can be improved when the composite coating of embodiment according to the present invention is applied to electromagnetic oven cooker
Especially the heating of ceramic cooker can be improved in the heating power of magnetic furnace cookware or the stability for improving power when in use
Power or the stability for improving power when in use.Electromagnetic oven cooker according to an embodiment of the present invention has ceramics as a result,
While pot body, the stability of power when still being able to heating power with higher or using.
In the third aspect of the present invention, the invention proposes a kind of methods for preparing mentioned-above electromagnetic oven cooker.Root
According to the embodiment of the present invention, this method comprises: providing pot body；First is formed at least part of the lower surface of the pot body
Conductive layer；Magnetic layer is formed in the lower surface of first conductive layer；And second is formed on the surface of the magnetic layer and is led
Electric layer.Thus, it is possible to be effectively prepared electromagnetic oven cooker according to an embodiment of the present invention.According to an embodiment of the invention, passing through
Composite coating is formed, the heating power of electromagnetic oven cooker can be improved or improves the stability of power when in use, especially,
The heating power of ceramic cooker can be improved or improve the stability of power when in use.As a result, according to embodiments of the present invention
Prepared electromagnetic oven cooker is while having ceramic pot body, power when still being able to heating power with higher or using
Stability.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 shows the structural schematic diagram of the composite coating according to an embodiment of the invention for electromagnetic oven cooker；
Fig. 2 shows the structural representation of the composite coating in accordance with another embodiment of the present invention for electromagnetic oven cooker
Figure；
Fig. 3 shows the structural schematic diagram of electromagnetic oven cooker according to an embodiment of the invention；
Fig. 4 shows the structural schematic diagram of the electromagnetic oven cooker of another embodiment of the present invention；
Fig. 5 shows the schematic diagram of electromagnetic oven cooker bottom part structure according to an embodiment of the invention；
Fig. 6 shows the schematic diagram of electromagnetic oven cooker bottom part structure in accordance with another embodiment of the present invention；
Fig. 7 shows the bottom view of electromagnetic oven cooker bottom according to an embodiment of the invention；
Fig. 8 shows the flow diagram according to an embodiment of the invention for preparing electromagnetic oven cooker；
Fig. 9 shows the flow diagram in accordance with another embodiment of the present invention for preparing electromagnetic oven cooker；
Figure 10 shows the flow diagram in accordance with another embodiment of the present invention for preparing electromagnetic oven cooker；And
Figure 11 shows the structural schematic diagram of metal powder according to an embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
In the first aspect of the present invention, the present invention provides a kind of composite coatings for electromagnetic oven cooker.Below with reference to
The composite coating is described in detail in attached drawing.With reference to Fig. 1, according to an embodiment of the invention, this can be used for electromagnetic oven cooker
Composite coating include: the first conductive layer 110, magnetic layer 120 and the second conductive layer 130.According to an embodiment of the invention, magnetic conduction
Layer 120 can be formed in the lower surface of the first conductive layer 110, and the second conductive layer 130 can be formed in the following table of magnetic layer 120
Face.
According to an embodiment of the invention, inventor has found that composite coating of the invention has conductive layer-magnetic layer-conductive layer
Three-decker, when the bottom of a pan of electromagnetic oven cooker is formed with the composite coating, with other structures such as conductive layer-magnetic layer knot
Structure is compared, and can embody lower resistance, and can show resistance more evenly, utilizes the electromagnetism so as to improve
The stability of power and power that furnace cookware is heated.Especially, inventors have found that in ceramic cooker (such as IH formula ceramics
Pot) the bottom of a pan when being formed with the composite coating, the effect heated using electromagnetic oven to the ceramic cooker can be effectively realized
Fruit, while the cookware can also show lower resistance and more uniform resistance, so as to further increase the ceramic pan
The heating power and power stability of tool.According to an embodiment of the invention, the bottom of a pan when ceramic cooker is formed with the composite coating
When, heating power can steadily reach 1200 watts, and the stability of heating power is good.
According to some embodiments of the present invention, the first conductive layer and the second conductive layer can be separately micro- with 4~8
The thickness of rice, magnetic layer can have 6~12 microns of thickness.As a result, by the composite coating of embodiment according to the present invention
When applied to electromagnetic oven cooker, it can be further improved the heating power of electromagnetic oven cooker or improve the steady of power when in use
It is qualitative, and can ensure the available control of the cost of electromagnetic oven cooker, its appearance will not be influenced.
According to an embodiment of the invention, the material that can be used for conductive layer and magnetic layer of the invention is not limited especially
System.According to some embodiments of the present invention, the first conductive layer 110 and the second conductive layer 130 can separately containing 65~
First glass powder of the metal powder of 75 parts by weight and 5~10 parts by weight.According to an embodiment of the invention, the type of metal powder not by
Especially limitation, can be any conductive commercial metals powder.According to some embodiments of the present invention, metal powder can have
There is composite construction, for example, with reference to Figure 11, according to an embodiment of the invention, metal powder may include metal core 1110 and surface gold
Belong to layer 1120, surface metal-layer 1120 is formed in the surface of the metal core 1110.According to an embodiment of the invention, metal core
1110 can be by least one formation of copper, gold, aluminium and its alloy, surface metal-layer 1120 can be by selected from silver, gold,
At least one formation of nickel and its alloy.Thus, it is possible to further increase the electric conductivity of conductive layer, and reduce conductive layer
Preparation cost.Other embodiments according to the present invention, metal powder can be silver-plated copper powder, and cost is relatively low for silver-plated copper powder,
And the electric conductivity of conductive layer can also be further increased, and can ensure the binding force between conductive layer and magnetic layer.
Furthermore it is possible to use partial size for 3~8 microns of silver-plated copper powder, thus, it is possible to further increase the conduction of conductive layer
Performance, and can further ensure that the binding force between conductive layer and magnetic layer.According to an embodiment of the invention, silver-plated copper powder
Silver content be not particularly restricted, any commercially available available silver-plated copper powder can be used.According to a particular embodiment of the invention,
It is preferred that using the total weight silver content based on silver-plated copper powder for the silver-plated copper powder of 20~30 weight %.Thus, it is possible to obtain more preferable
Electric conductivity, and cost can be controlled, be suitble to industrialized production.
About magnetic layer 120, according to an embodiment of the invention, magnetic layer 120 can contain magnetic powder and the second glass powder, from
It and is that magnetic layer assigns magnetic property, while can also ensure that there is good knot between magnetic layer 120 and the first conductive layer 110
There is good binding force with joint efforts and between magnetic layer 120 and the second conductive layer 130.In addition, implementation according to the present invention
Example, magnetic powder can have 5~10 microns of partial size.A specific example according to the present invention, magnetic powder can be micro- for partial size 6~10
The NiFeMo magnetic powder (Ni 80-82%, Fe 5.5-8.5% and Mo 1.5-2.5% can be contained according to weight percent) of rice,
Magnetic conductivity 14-500 μ.As a result, when the composite coating of embodiment according to the present invention is applied to electromagnetic oven cooker, Ke Yijin
One step improves the heating power of electromagnetic oven cooker or improves the stability of power when in use.
The glass powder used by the first conductive layer 110, magnetic layer 120 and the second conductive layer 130, according to the present invention
Embodiment, it is preferred to use glass powder with low melting point.Specifically, according to some embodiments of the present invention, the first glass powder and second
Glass powder can be separately with 490~700 degrees Celsius of sintering temperature.Specifically, according to an embodiment of the invention, low
Melting glass frit can contain Bi according to weight percent2O345-65%, SiO28-13%, ZnO 2-9%, TiO21-6%,
SrO 1-10%, Al2O35-14%.According to some embodiments of the present invention, the first glass powder and the second glass powder can be environmental protection
Type low melting point SHBF-160.Environment-friendly low-melting point SHBF-160 is commercially available.Thus, it is possible to further increase compound painting
Binding force in layer between each layer, thus when the composite coating of embodiment according to the present invention is applied to electromagnetic oven cooker,
It further increases the heating power of electromagnetic oven cooker or improves the stability of power when in use.
According to an embodiment of the invention, the method for forming the first conductive layer 110, magnetic layer 120 and the second conductive layer 130
It is not particularly restricted.Inventors have found that for example pasting magnetic conductive film relative to other modes by using the mode directly printed
Mode, can effectively shorten processing procedure, improve preparation efficiency, and can be improved the power of heating.According to the present invention one
A little embodiments, the first conductive layer 110, magnetic layer 120 and the second conductive layer 130 are separately by silk-screen printing, spray
At least one formation for applying and brushing.Thus, it is possible to further increase the efficiency for preparing composite coating, shortening prepares compound painting
The processing procedure of layer, so as to further decrease the cost of composite coating.Inventors have found that passing through according to embodiments of the present invention
Directly print method and the composite coating that obtains can be assigned for electromagnetic oven cooker especially ceramic cooker up to 1200 watts plus
Thermal power, and 500~700 watts of heating power and heating power wave are then only able to achieve by the way of pasting magnetic conductive film
It is dynamic very big.According to an embodiment of the invention, forming the first conductive layer 110, magnetic layer 120 or the second conductive layer by printing
Further it can also be sintered separately or together after 130, to further increase acquired composite coating
Performance, thus the performance of electromagnetic oven cooker obtained by further increasing.
In addition, according to some embodiments of the present invention, composite coating can further include glaze layer 140 with reference to Fig. 2,
The glaze layer 140 is formed in the lower surface of the second conductive layer 130.According to an embodiment of the invention, by using glaze layer, it can be effective
Composite coating is protected on ground, and according to specific embodiment, can be by selecting glaze layer color, to improve
Beauty when composite coating is applied to electromagnetic oven cooker.According to some embodiments of the present invention, glaze layer has 8~14 microns
Thickness.When the composite coating of embodiment according to the present invention is applied to electromagnetic oven cooker, electromagnetism can be further improved
The heating power of furnace cookware or the stability for improving power when in use.According to some embodiments of the present invention, glaze layer 140 contains
There are the ceramic paint of 40~50 parts by weight and the third glass powder of 35~45 parts by weight.In answering embodiment according to the present invention
When closing coating applied to electromagnetic oven cooker, it can be further improved the heating power of electromagnetic oven cooker or improve function when in use
The stability of rate, and may insure the binding force between glaze layer 140 and the second conductive layer 130.
The glass powder used by glaze layer 140, according to an embodiment of the invention, it is preferred that using glass powder with low melting point.Tool
Body, according to some embodiments of the present invention, third glass powder can have 490~700 degrees Celsius of sintering temperature.Specifically
, according to an embodiment of the invention, glass powder with low melting point can contain Bi according to weight percent2O345-65%, SiO28-
13%, ZnO 2-9%, TiO21-6%, SrO 1-10%, Al2O35-14%.According to some embodiments of the present invention, third glass
Glass powder can be environment-friendly low-melting point SHBF-160.Environment-friendly low-melting point SHBF-160 is commercially available.Thus, it is possible into
One step improves the binding force between glaze layer 140 and the second conductive layer 130, thus by the compound painting of embodiment according to the present invention
When layer is applied to electromagnetic oven cooker, further increases the heating power of electromagnetic oven cooker or improve the stabilization of power when in use
Property.
According to an embodiment of the invention, the method for forming glaze layer 140 is not particularly restricted.Inventors have found that by adopting
The mode for for example pasting magnetic conductive film relative to other modes with the mode directly printed can effectively shorten processing procedure, improve system
Standby efficiency, and can be improved the power of heating.According to some embodiments of the present invention, glaze layer 140 is by silk-screen printing, spray
At least one formation for applying and brushing.Thus, it is possible to further increase the efficiency for preparing composite coating, shortening prepares compound painting
The processing procedure of layer, so as to further decrease the cost of composite coating.Inventor's discovery passes through straight according to embodiments of the present invention
The composite coating for connecing printing process and obtaining can be electromagnetic oven cooker especially ceramic cooker, such as IH formula ceramic pan, assign
Up to 1200 watts of heating power, and 500~700 watts of heating function is then only able to achieve by the way of pasting magnetic conductive film
Rate.According to an embodiment of the invention, further it can also be sintered after forming glaze layer 140 by printing,
To further increase the performance of acquired composite coating, thus the performance of electromagnetic oven cooker obtained by further increasing.
In the second aspect of the present invention, the invention proposes a kind of electromagnetic oven cookers.With reference to Fig. 3 and Fig. 4, according to the present invention
Embodiment, which may include: pot body 200 and composite coating 100, wherein composite coating 100 is formed in pot body
At least part of lower surface 210, and composite coating 100 is the composite coating described above for electromagnetic oven cooker.
At least part with reference to Fig. 3 and Fig. 5 (enlarged diagram that Fig. 5 is Fig. 3 encircled), on the lower surface of pot body 200 210
On be formed with the first conductive layer 110, magnetic layer 120 is formed on the lower surface of the first conductive layer 110, in magnetic layer 120
The second conductive layer 130 is formed on lower surface.With reference to Fig. 4 and Fig. 6 (enlarged diagram that Fig. 6 is Fig. 4 encircled), second
Glaze layer 140 can also be formed on the lower surface of conductive layer 130.
According to an embodiment of the invention, the type for the pot body that can be used is not particularly restricted.Reality according to the present invention
Example is applied, at least part for the pot body that can be used is formed by ceramic material.Some specific examples according to the present invention, pot
Body is formed by ceramic material.It will be appreciated to those of skill in the art that pot body can also have by other materials
The component of formation, details are not described herein.
As previously mentioned, can be improved when the composite coating of embodiment according to the present invention is applied to electromagnetic oven cooker
Especially adding for ceramic cooker can be improved in the heating power of electromagnetic oven cooker or the stability for improving power when in use
Thermal power or the stability for improving power when in use.Electromagnetic oven cooker according to an embodiment of the present invention has pottery as a result,
While porcelain pot body, the stability of power when still being able to heating power with higher or using.Due to ceramic pan itself
Advantage, with the improvement of living standards, consumer increasingly likes using ceramic pan.But since ceramic pan itself does not have ferromagnetism
Can, it is therefore often difficult to be applied to electromagnetic oven heating.Electromagnetic oven cooker of the invention can use existing any ceramics
Pot, by forming composite coating 100, so that it may directly apply to electromagnetic oven and be heated.According to an embodiment of the invention, according to
The ceramic cooker of the embodiment of the present invention assigns up to 1200 watts of heating power.
The setting form of composite coating 100 is not particularly restricted.With reference to Fig. 7, according to some embodiments of the present invention,
Composite coating 100 can be set to circular pattern, and the center of circle of circular pattern is the center of pot body lower surface 210.
Term " center " used herein above is defined as that the circle of the minimum area circle of 210 entire area of pot body lower surface can be covered
The heart.For example, the circular center of circle is "center" when pot body lower surface 210 is round.When pot body lower surface 210 is pros
When shape, the diagonal line intersection point of the square is "center".Thus, it is possible to further increase ceramic cooker heating power or
Improve the stability of power when in use.According to an embodiment of the invention, region area occupied by composite coating is not by spy
It does not limit.According to some embodiments of the present invention, the outer radius R1 of circular pattern and inside radius R2 difference are 1~3 millimeter.Change speech
It, the big radius of circle R1 and small radius of circle R2 of circular pattern meet relationship R1-R2=1~3 millimeter.Thus, it is possible to further mention
The heating power of high ceramic cooker or the stability for improving power when in use, and reduce preparation cost.
It will be appreciated by those skilled in the art that front is just used for feature described in the composite coating of ceramic cooker and excellent
Point is equally applicable to the ceramic cooker, and details are not described herein.In addition, it will be understood by those skilled in the art that ceramic cooker may be used also
With with other conventional features, handle etc., details are not described herein.
In the third aspect of the present invention, the invention proposes a kind of methods for preparing mentioned-above electromagnetic oven cooker.Ginseng
Fig. 8 is examined, according to an embodiment of the invention, the method for preparing mentioned-above electromagnetic oven cooker includes:
S100 provides pot body
According to an embodiment of the invention, the type for the pot body that can be used is not particularly restricted.Reality according to the present invention
Example is applied, at least part for the pot body that can be used is formed by ceramic material.Some specific examples according to the present invention, pot
Body is integrally to be formed by ceramic material, such as can use conventional IH formula ceramic pan.Skilled artisans appreciate that
, pot body can also have the component formed by other materials, and details are not described herein.The advantages of due to ceramic pan itself, with
Improvement of living standard, consumer increasingly like using ceramic pan.But since ceramic pan itself does not have ferromagnetic property, because
This, is generally difficult to be applied to electromagnetic oven heating.Electromagnetic oven cooker of the invention can use existing any ceramic pan, lead to
It crosses to form composite coating 100, so that it may directly apply to electromagnetic oven and be heated.According to an embodiment of the invention, according to this hair
The ceramic cooker of bright embodiment assigns up to 1200 watts of heating power.
S200 forms the first conductive layer
After obtaining pot body, the first conductive layer is formed at least part of the lower surface of pot body first.According to this hair
The setting form of bright embodiment, the first conductive layer is not particularly restricted.With reference to Fig. 7, some implementations according to the present invention
Example can form first conductive layer with circular pattern in the lower surface of pot body, and the center of circle of circular pattern is under pot body
The center on surface.Term " center " used herein above is defined as that the minimum area of pot body lower surface entire area can be covered
The round center of circle.For example, the circular center of circle is "center" when pot body lower surface is round.When pot body lower surface is pros
When shape, the diagonal line intersection point of the square is "center".Thus, it is possible to further increase ceramic cooker heating power or
Improve the stability of power when in use.According to an embodiment of the invention, region area occupied by the first conductive layer not by
Especially limitation.According to some embodiments of the present invention, the outer radius R1 of circular pattern and inside radius R2 difference are 1~3 millimeter.Change speech
It, the big radius of circle R1 and small radius of circle R2 of circular pattern meet relationship R1-R2=1~3 millimeter.Thus, it is possible to further mention
The heating power of high ceramic cooker or the stability for improving power when in use, and reduce preparation cost.
S300 forms magnetic layer
After forming the first conductive layer, magnetic layer can be formed in the lower surface of the first conductive layer.
S400 forms the second conductive layer
After forming magnetic layer, the second conductive layer can be formed in the lower surface of magnetic layer.Thus, it is possible to effectively make
Standby electromagnetic oven cooker according to an embodiment of the present invention.According to an embodiment of the invention, electricity can be improved by forming composite coating
Especially the heating of ceramic cooker can be improved in the heating power of magnetic furnace cookware or the stability for improving power when in use
Power or the stability for improving power when in use.Prepared electromagnetic oven cooker according to embodiments of the present invention is having as a result,
While having ceramic pot body, the stability of power when still being able to heating power with higher or using.
According to an embodiment of the invention, forming the mode and material of the first conductive layer, magnetic layer and the second conductive layer not
It is particularly limited.According to some embodiments of the present invention, the first conductive layer and the second conductive layer can be used
Metal powder pulp is formed.According to an embodiment of the invention, the metal powder pulp can the metal powder containing 65~75 parts by weight, 5~10
First glass powder of parts by weight and the first organic carrier compound of 20~25 parts by weight.According to an embodiment of the invention, golden
The type for belonging to powder is not particularly limited, and can be any conductive commercial metals powder.Some implementations according to the present invention
Example, metal powder include metal core and surface metal-layer, and surface metal-layer is formed in the surface of the metal core, metal core be by
At least one formation of copper, gold, aluminium and its alloy, surface metal-layer is by at least one selected from silver, gold, nickel and its alloy
It is formed.Other embodiments according to the present invention, metal powder can be silver-plated copper powder, and cost is relatively low for silver-plated copper powder, and
The electric conductivity of conductive layer can also be further increased, and can ensure the binding force between conductive layer and magnetic layer.
Furthermore it is possible to use partial size for 3~8 microns of silver-plated copper powder, thus, it is possible to further increase the conduction of conductive layer
Performance, and can further ensure that the binding force between conductive layer and magnetic layer.According to an embodiment of the invention, silver-plated copper powder
Silver content be not particularly restricted, any commercially available available silver-plated copper powder can be used.According to a particular embodiment of the invention,
It is preferred that using the total weight silver content based on silver-plated copper powder for the silver-plated copper powder of 20~30 weight %.Thus, it is possible to obtain more preferable
Electric conductivity, and cost can be controlled, be suitble to industrialized production.
Embodiment according to the present invention magnetic layer can be using magnetic paint formation.According to an embodiment of the invention, the magnetic
Magnetic powder of the slurry containing 60~70 parts by weight, the second glass powder of 5~10 parts by weight and the second of 20~25 parts by weight have airborne
Nanocrystal composition.According to an embodiment of the invention, magnetic powder can have 5~10 microns of partial size.One according to the present invention specific
Example, magnetic powder can for 6~10 microns of partial size NiFeMo magnetic powder (a according to weight percent can contain Ni 80-82%,
Fe5.5-8.5% and Mo 1.5-2.5%), magnetic conductivity 14-500 μ.Thus, it is possible to further increase acquired electromagnetic oven cooker
Heating power or improve the stability of power when in use.
According to an embodiment of the invention, the total weight based on the first organic carrier compound, the first organic carrier compound
First organic solvent of the first organic carrier containing 20-30 weight % and 70-80 weight %；And it is based on the second organic carrier
The total weight of compound, the second organic carrier compound contain the second organic carrier and 70-80 weight % of 20-30 weight %
Second organic solvent.Thus, it is possible to effectively improve the efficiency to form each layer, and the knot between each layer can be improved significantly
Intensity is closed, to further increase the heating power of obtained electromagnetic oven cooker or improve the stabilization of power when in use
Property.According to some embodiments of the present invention, the first organic carrier and the second organic carrier separately include fine selected from ethyl
At least one of element, methylcellulose, nitrocellulose and rosin are tieed up, the first organic solvent and the second organic solvent difference are only
It on the spot include selected from least one of butyl ether, Lauryl Alcohol ester, ethylene glycol ethyl ether, turpentine oil, cyclohexanone and terpinol.As a result,
After forming conductive layer and magnetic layer using these organic carriers and organic solvent, it is easy to remove it by processing such as heating,
There is no residuals, to will not influence the performance of acquired electromagnetic oven cooker.
According to an embodiment of the invention, forming the method for the first conductive layer, magnetic layer and the second conductive layer not by spy
It does not limit.Inventors have found that the mode of magnetic conductive film, energy are for example pasted relative to other modes by using the mode directly printed
It is enough effectively to shorten processing procedure, preparation efficiency is improved, and can be improved the power of heating.According to some embodiments of the present invention,
First conductive layer, magnetic layer and the second conductive layer are separately at least one by silk-screen printing, spraying and brushing
It is formed.Thus, it is possible to further increase the efficiency for preparing composite coating, shortening prepares the processing procedure of composite coating, so as to
Further decrease the cost of composite coating.Inventors have found that by directly printing method and obtaining according to embodiments of the present invention
Composite coating can assign up to 1200 watts of heating power for electromagnetic oven cooker especially ceramic cooker, and use to paste and lead
The mode of magnetic film is then only able to achieve 500~700 watts of heating power and heating power fluctuation is very big.
According to some embodiments of the present invention, the first conductive layer and the second conductive layer are separately by 250~300
Mesh silk-screen printing is formed and magnetic layer is formed by 150~200 mesh silk-screen printings.Thus, it is possible to further increase
The efficiency of composite coating is prepared, shortening prepares the processing procedure of composite coating, prepares electromagnetic oven cooker so as to further decrease
Cost.It will be appreciated by persons skilled in the art that when forming the first conductive layer, magnetic layer and the second conductive layer, Ke Yitong
Multiple silk-screen printing is crossed to complete.According to a particular embodiment of the invention, the first conductive layer and the second conductive layer are independently
Ground is formed by 2 times 250~300 mesh silk-screen printings and magnetic layer is formed by 3 times 150~200 mesh silk-screen printings
's.Thus, it is possible to further increase the performance of obtained electromagnetic oven cooker.
It can further include after forming the second conductive layer with reference to Fig. 9:
S500 forms glaze layer
After forming the second conductive layer, glaze layer can be formed in the lower surface of the second conductive layer.Reality according to the present invention
Example is applied, by using glaze layer, effectively composite coating and pot body can be protected, and according to specific embodiment,
It can be by selecting glaze layer color, to improve the beauty of electromagnetic oven pan.According to some embodiments of the present invention, glaze layer
It is to be formed using glaze, and glaze contains the third glass powder of the ceramic paint of 40~50 parts by weight, 35~45 parts by weight
And 10~20 parts by weight third organic carrier compound, wherein the total weight based on third organic carrier compound, third
Organic carrier compound contains the third organic carrier of 20-30 weight % and the third organic solvent of 70-80 weight %.As a result,
The efficiency to form each layer can be effectively improved, and the bond strength between each layer can be improved significantly, thus further
It improves the heating power of obtained electromagnetic oven cooker or improves the stability of power when in use.
The glass powder used by glaze layer, according to an embodiment of the invention, it is preferred that using glass powder with low melting point.Specifically
, according to some embodiments of the present invention, third glass powder can have 490~700 degrees Celsius of sintering temperature.Specifically,
According to an embodiment of the invention, glass powder with low melting point can contain Bi according to weight percent2O345-65%, SiO28-13%,
ZnO 2-9%, TiO21-6%, SrO 1-10%, Al2O35-14%.According to some embodiments of the present invention, third glass powder can
Think environment-friendly low-melting point SHBF-160.Environment-friendly low-melting point SHBF-160 is commercially available.Thus, it is possible to further mention
Binding force between high glaze layer and the second conductive layer, thus the composite coating of embodiment according to the present invention is applied to electromagnetism
When furnace cookware, further increases the heating power of electromagnetic oven cooker or improve the stability of power when in use.
According to some embodiments of the present invention, third organic carrier includes being selected from ethyl cellulose, methylcellulose, nitric acid
At least one of cellulose and rosin, third organic solvent include being selected from butyl ether, Lauryl Alcohol ester, ethylene glycol ethyl ether, turpentine
At least one of oil, cyclohexanone and terpinol.As a result, after forming glaze layer using these organic carriers and organic solvent, it is easy
It is removed it by processing such as heating, there is no residuals, to will not influence the performance of acquired electromagnetic oven cooker.According to this
Some embodiments of invention, ceramic paint and pot body color having the same.Thus, it is possible to improve the beauty of electromagnetic oven pan.Root
According to some embodiments of the present invention, glaze layer is at least one formation by silk-screen printing, spraying and brushing.Thus, it is possible to
The efficiency to form composite coating is further increased, shortening prepares the processing procedure of composite coating, so as to further decrease preparation electricity
The cost of magnetic furnace cookware.According to some embodiments of the present invention, glaze layer is formed by using 100~150 mesh silk-screen printings.
Thus, it is possible to further increase the efficiency to form composite coating, shortening prepares the processing procedure of composite coating, so as to further drop
The low cost for preparing electromagnetic oven cooker.
With reference to Figure 10, the method for preparing electromagnetic oven cooker be can further include:
S600 sintering
According to an embodiment of the invention, can will have the first conductive layer, magnetic layer, the second conductive layer or glaze layer being formed
Pot body be sintered.According to some embodiments of the present invention, sintering is carried out under 550~600 degrees Celsius.By
This, can be further improved the performance of acquired composite coating, thus the performance of electromagnetic oven cooker obtained by further increasing.This
Field technical staff is, it is understood that sintering step can also form the first conductive layer, magnetic layer, the second conductive layer and glaze
It carries out, can also be sintered together after forming glaze layer respectively after each layer of layer.
The present invention is explained and illustrated below by specific embodiment, skilled artisans appreciate that
It is that the following examples are merely illustrative, does not limit the scope of the invention in any way.And in following implementation
In example, unless stated otherwise, used material is commercially available.
Conventional method
In embodiment below, electromagnetic oven cooker is prepared using following conventional method
1, material
Pot body, using ceramic pan
Metal powder: silver-plated copper powder (partial size is 3~8 microns, and silver content is 20-30 weight %), silvered aluminum powder, nickel-plated copper powder
Or nickel plated aluminum powder.
Silver-plated copper powder:；
Glass powder: the environment-friendly low-melting point glass powder (SHBF-160) that partial size is 5~10 microns；
Organic carrier: organic carrier is macromolecule resin, ingredient be ethyl cellulose, methylcellulose, nitrocellulose,
One or more of rosin；
Organic solvent: organic solvent is butyl ether, in Lauryl Alcohol ester, ethylene glycol ethyl ether, turpentine oil, cyclohexanone, terpinol
One or more；
Magnetic powder: NiFeMo magnetic powder (Ni 80-82%, Fe5.5-8.5%, Mo1.5-2.5%), partial size are 6~10 microns,
Magnetic conductivity is 14-500 μ；
Ceramic paint: pigment identical with ceramic pan body color is used.
2, it stocks up
The preparation of organic carrier compound: weighing organic carrier 20-30 parts by weight and 70~80 parts by weight of organic solvent are adopted
With magnetic stirring apparatus with revolving speed 1400rpm and 80 degrees Celsius at a temperature of stir 3 hours, then use 300-400 mesh silk screen
Filtering.
The preparation of metal powder: it is compound that metal powder 65-75 parts by weight, glass powder 5-10 parts by weight, above-mentioned organic carrier are weighed
Object 20-25 parts by weight are uniformly mixed, and are then ground 1 hour using three-roll grinder；
The preparation of magnetic paint: weighing above-mentioned magnetic powder 60-70 parts by weight, glass powder 5-10 parts by weight, and above-mentioned organic carrier is compound
Object 20-25 parts by weight are uniformly mixed, and are then ground 1 hour using three-roll grinder；
The preparation of glaze: weighing and ceramic paint 40-50 parts by weight, the glass powder 35-45 parts by weight of ceramic pot body true qualities,
Above-mentioned organic carrier compound 10-20 parts by weight are uniformly mixed.
3, electromagnetic oven cooker is prepared
Firstly, cleaning using scouring pad and cleaning agent to ceramic pot bottom, 10 points are then toasted under 100 degrees Celsius
Clock；
Next, in ceramic pot bottom, using 2 times metal powder pulps of 250-300 mesh silk-screen printing, acquired first conductive layer
With a thickness of 4-8 microns, then at one hundred and twenty degrees centigrade toast 15 minutes；
Then, after type metal slurry, on obtained first conductive layer, using 150-200 mesh silk-screen printing 3
All over magnetic paint, acquired magnetic layer with a thickness of at 6-12 micron, then baking 15 minutes at one hundred and twenty degrees centigrade；
Then, after printing magnetic paint, on obtained magnetic layer, using 2 times metal powders of 250-300 mesh silk-screen printing
Slurry, acquired magnetic layer with a thickness of 4-8 micron, then at one hundred and twenty degrees centigrade baking 15 minutes；
Then, after type metal slurry, on obtained second conductive layer, using 100-150 mesh silk-screen printing 3
All over printing glaze material, acquired glaze layer with a thickness of 8-14 microns, then toasted 15 minutes under 120 degree；And
Finally, at normal temperature, obtained ceramic pan is put into Muffle furnace and is baked to 550-600 degree, it is then naturally cold
But, electromagnetic oven cooker made of the ceramics with composite coating thereby is achieved.
Embodiment 1
In this embodiment according to described in conventional method the step of, prepares electromagnetic oven cooker, wherein difference is:
Using ethyl cellulose as organic carrier；
Use butyl ether for organic solvent；
70 parts by weight of 20 parts by weight of organic carrier and organic solvent are used in the preparation of organic carrier compound；
65 parts by weight of silver-plated copper powder, 5 parts by weight of glass powder, 20 weight of organic carrier compound are used in the preparation of metal powder pulp
Measure part；
60 parts by weight of magnetic powder, 5 parts by weight of glass powder, 20 parts by weight of organic carrier compound are used in the preparation of magnetic paint；
40 parts by weight of ceramic paint, 35 parts by weight of glass powder, 10 weight of organic carrier compound are used in the preparation of glaze
Part；And
First conductive layer with a thickness of 4 microns, magnetic layer with a thickness of 6 microns, the second conductive layer with a thickness of 4 microns,
Glaze layer with a thickness of 8 microns.
Embodiment 2
In this embodiment according to described in conventional method the step of, prepares electromagnetic oven cooker, wherein difference is:
Using methylcellulose as organic carrier；
Use Lauryl Alcohol ester for organic solvent；
80 parts by weight of 30 parts by weight of organic carrier and organic solvent are used in the preparation of organic carrier compound；
75 parts by weight of silver-plated copper powder, 10 parts by weight of glass powder, organic carrier compound 25 are used in the preparation of metal powder pulp
Parts by weight；
60 parts by weight of magnetic powder, 5 parts by weight of glass powder, 20 parts by weight of organic carrier compound are used in the preparation of magnetic paint；
50 parts by weight of ceramic paint, 45 parts by weight of glass powder, 20 weight of organic carrier compound are used in the preparation of glaze
Part；And
First conductive layer with a thickness of 8 microns, magnetic layer with a thickness of 12 microns, the second conductive layer with a thickness of 8 microns,
Glaze layer with a thickness of 14 microns.
Embodiment 3
In this embodiment according to described in conventional method the step of, prepares electromagnetic oven cooker, wherein difference is:
Using nitrocellulose as organic carrier；
Use ethylene glycol ethyl ether for organic solvent；
75 parts by weight of 25 parts by weight of organic carrier and organic solvent are used in the preparation of organic carrier compound；
70 parts by weight of silver-plated copper powder, 8 parts by weight of glass powder, 23 weight of organic carrier compound are used in the preparation of metal powder pulp
Measure part；
65 parts by weight of magnetic powder, 7 parts by weight of glass powder, 23 parts by weight of organic carrier compound are used in the preparation of magnetic paint；
45 parts by weight of ceramic paint, 40 parts by weight of glass powder, 18 weight of organic carrier compound are used in the preparation of glaze
Part；And
First conductive layer with a thickness of 6 microns, magnetic layer with a thickness of 10 microns, the second conductive layer with a thickness of 7 microns,
Glaze layer with a thickness of 12 microns.
Embodiment 4
In this embodiment according to described in conventional method the step of, prepares electromagnetic oven cooker, wherein difference is:
Using rosin as organic carrier；
Use turpentine oil for organic solvent；
74 parts by weight of 23 parts by weight of organic carrier and organic solvent are used in the preparation of organic carrier compound；
68 parts by weight of silver-plated copper powder, 8 parts by weight of glass powder, 22 weight of organic carrier compound are used in the preparation of metal powder pulp
Measure part；
65 parts by weight of magnetic powder, 7 parts by weight of glass powder, 23 parts by weight of organic carrier compound are used in the preparation of magnetic paint；
45 parts by weight of ceramic paint, 40 parts by weight of glass powder, 18 weight of organic carrier compound are used in the preparation of glaze
Part；And
First conductive layer with a thickness of 5 microns, magnetic layer with a thickness of 12 microns, the second conductive layer with a thickness of 8 microns,
Glaze layer with a thickness of 10 microns.
Embodiment 5
The embodiment is same as Example 1, and difference is using cyclohexanone as organic solvent.
Embodiment 6
The embodiment is same as Example 2, and difference is using terpinol as organic solvent.
Embodiment 7
The embodiment is same as Example 2, and difference is using silvered aluminum powder as metal powder.
Embodiment 8
The embodiment is same as Example 2, and difference is using nickel plated aluminum powder as metal powder.
Embodiment 9
The embodiment is same as Example 2, and difference is using nickel-plated copper powder as metal powder.
Testing example
The preparation-obtained cookware of Examples 1 to 9 is applied to electromagnetic oven to detect, it is found that all have lower electricity
Resistance, and distribution of resistance is uniform, and heating power can achieve 1200 watts, and heating power is stablized.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
What can be combined in any suitable manner in one or more embodiment or examples.In addition, those skilled in the art can say this
Different embodiments or examples described in bright book are engaged and are combined.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (32)
1. a kind of composite coating for electromagnetic oven cooker characterized by comprising
First conductive layer；
Magnetic layer, the magnetic layer are formed in the lower surface of first conductive layer；And
Second conductive layer, second conductive layer are formed in the lower surface of the magnetic layer,
Wherein, the magnetic layer has 6~12 microns of thickness, and first conductive layer and second conductive layer are independently
Ground has 4~8 microns of thickness.
2. the composite coating according to claim 1 for electromagnetic oven cooker, which is characterized in that first conductive layer and
First glass powder of metal powder and 5~10 parts by weight of second conductive layer separately containing 65~75 parts by weight.
3. the composite coating according to claim 2 for electromagnetic oven cooker, which is characterized in that the metal powder includes gold
Belong to core and surface metal-layer, the surface metal-layer are formed in the surface of the metal core, the metal core is by copper, gold, aluminium
And its at least one formation of alloy, the surface metal-layer is formed by at least one selected from silver, gold, nickel and its alloy
's.
4. the composite coating according to claim 3 for electromagnetic oven cooker, which is characterized in that the metal powder is silver-plated
Copper powder, and the total weight based on the silver-plated copper powder, the silver-plated copper powder contain the silver of 20~30 weight %.
5. the composite coating according to claim 3 for electromagnetic oven cooker, which is characterized in that the magnetic layer contains 60
Second glass powder of the magnetic powder of~70 parts by weight and 5~10 parts by weight.
6. the composite coating according to claim 5 for electromagnetic oven cooker, which is characterized in that first glass powder and
Second glass powder separately has 490~700 degrees Celsius of sintering temperature.
7. the composite coating according to claim 5 for electromagnetic oven cooker, which is characterized in that first glass powder and
Second glass powder is SHBF-160.
8. composite coating according to claim 1, which is characterized in that first conductive layer, the magnetic layer and described
Second conductive layer is separately at least one formation by silk-screen printing, spraying and brushing.
9. the composite coating according to claim 1 for electromagnetic oven cooker, which is characterized in that further comprise:
Glaze layer, the glaze layer are formed in the lower surface of second conductive layer.
10. the composite coating according to claim 9 for electromagnetic oven cooker, which is characterized in that the glaze layer have 8~
14 microns of thickness.
11. the composite coating according to claim 9 for electromagnetic oven cooker, which is characterized in that the glaze layer contains 40
The third glass powder of the ceramic paint of~50 parts by weight and 35~45 parts by weight.
12. the composite coating according to claim 11 for electromagnetic oven cooker, which is characterized in that the third glass powder
With 490~700 degrees Celsius of sintering temperature.
13. the composite coating according to claim 12 for electromagnetic oven cooker, which is characterized in that the third glass powder
For SHBF-160.
14. the composite coating according to claim 13 for electromagnetic oven cooker, which is characterized in that the glaze layer is to pass through
At least one formation of silk-screen printing, spraying and brushing.
15. a kind of electromagnetic oven cooker characterized by comprising
Pot body, at least part of the pot body are formed by ceramics；
Composite coating, the composite coating is formed at least part of the pot body lower surface, and the composite coating is
The described in any item composite coatings for electromagnetic oven cooker of claim 1~14.
16. electromagnetic oven cooker according to claim 15, which is characterized in that the composite coating is arranged to have annular
Pattern, and the center of circle of the circular pattern is the center of the pot body lower surface.
17. electromagnetic oven cooker according to claim 16, which is characterized in that the outer radius and inside radius of the circular pattern
Difference is 1~3 millimeter.
18. a kind of method for preparing the described in any item electromagnetic oven cookers of claim 15~17 characterized by comprising
Pot body is provided, at least part of the pot body is formed by ceramics；
The first conductive layer is formed at least part of the lower surface of the pot body；
Magnetic layer is formed in the lower surface of first conductive layer；And
The second conductive layer is formed in the lower surface of the magnetic layer.
19. according to the method for claim 18, which is characterized in that first conductive layer and the second conductive layer are independently
Ground is formed using metal powder pulp, and the metal powder pulp contains the metal powder of 65~75 parts by weight, 5~10 parts by weight
First organic carrier compound of the first glass powder and 20~25 parts by weight,
The magnetic layer is formed using magnetic paint, and the magnetic paint contains the magnetic powder of 60~70 parts by weight, 5~10 parts by weight
The second glass powder and 20~25 parts by weight the second organic carrier compound.
20. according to the method for claim 19, which is characterized in that the metal powder includes metal core and surface metal-layer,
The surface metal-layer is formed in the surface of the metal core, and the metal core is by at least one of copper, gold, aluminium and its alloy
It is formed, the surface metal-layer is by least one formation selected from silver, gold, nickel and its alloy.
21. method described in 9 or 20 according to claim 1, which is characterized in that the metal powder is silver-plated copper powder, and is based on
The total weight of the silver-plated copper powder, the silver-plated copper powder contain the silver of 20~30 weight %；
Based on the total weight of the first organic carrier compound, the first organic carrier compound contains 20-30 weight %
The first organic carrier and 70-80 weight % the first organic solvent；And
Based on the total weight of the second organic carrier compound, the second organic carrier compound contains 20-30 weight %
The second organic carrier and 70-80 weight % the second organic solvent.
22. according to the method for claim 21, which is characterized in that first organic carrier and second organic carrier
It separately include being selected from least one of ethyl cellulose, methylcellulose, nitrocellulose and rosin,
First organic solvent and second organic solvent separately include selected from butyl ether, Lauryl Alcohol ester, second two
At least one of alcohol ether, turpentine oil, cyclohexanone and terpinol.
23. according to the method for claim 18, which is characterized in that first conductive layer, the magnetic layer and described the
Two conductive layers are separately at least one formation by silk-screen printing, spraying and brushing.
24. according to the method for claim 23, which is characterized in that first conductive layer and the second conductive layer are only respectively
The magnetic layer on the spot formed by 250~300 mesh silk-screen printings and described is formed by 150~200 mesh silk-screen printings
's.
25. according to the method for claim 18, which is characterized in that further comprise:
Glaze layer is formed in the lower surface of second conductive layer.
26. according to the method for claim 25, which is characterized in that the glaze layer is formed using glaze, and described
Glaze contains the third of the ceramic paint of 40~50 parts by weight, the third glass powder of 35~45 parts by weight and 10~20 parts by weight
Organic carrier compound,
Wherein,
Based on the total weight of the third organic carrier compound, the third organic carrier compound contains 20-30 weight %
Third organic carrier and 70-80 weight % third organic solvent.
27. according to the method for claim 26, which is characterized in that the third organic carrier includes being selected from ethyl cellulose
At least one of element, methylcellulose, nitrocellulose and rosin,
The third organic solvent includes being selected from butyl ether, Lauryl Alcohol ester, ethylene glycol ethyl ether, turpentine oil, cyclohexanone and terpinol
At least one of.
28. according to the method for claim 26, which is characterized in that the ceramic paint and pot body face having the same
Color.
29. according to the method for claim 25, which is characterized in that the glaze layer is by silk-screen printing, spraying and brushing
At least one formation.
30. according to the method for claim 29, which is characterized in that the glaze layer is by using 100~150 mesh screen printings
Scopiform at.
31. according to the method for claim 25, which is characterized in that after forming the glaze layer, further comprising will be described
Pot body is sintered.
32. according to the method for claim 31, which is characterized in that the sintering is carried out under 550~600 degrees Celsius
's.
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| CN108309019B (en) * | 2017-01-17 | 2023-09-26 | 佛山市顺德区美的电热电器制造有限公司 | Preparation method of ceramic vessel, ceramic vessel and cooking utensil |
| CN108937608B (en) * | 2018-06-21 | 2020-10-30 | 湖北华强日用玻璃有限公司 | Processing technology of glass magnetic conduction heating disc |
| CN112220330B (en) * | 2020-09-29 | 2022-04-29 | 代梓鹏 | Magnetic conductive film of glass inner container of electromagnetic heating electric cooker and preparation method and application thereof |
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| CN2111599U (en) * | 1991-12-20 | 1992-07-29 | 谢士凯 | Touch electronic voltage-adjusting switch |
| JPH06349045A (en) * | 1993-06-07 | 1994-12-22 | Hitachi Ltd | Disk type magnetic memory medium and magnetic disk storage device having this memory medium |
| JP2009034378A (en) * | 2007-08-02 | 2009-02-19 | Sumitomo Electric Fine Polymer Inc | Heating vessel for cooking and method for manufacturing heating vessel for cooking |
| CN201216466Y (en) * | 2008-06-12 | 2009-04-08 | 崔珂梅 | Electromagnetic heating heat-proof ceramic and glass ovenware |
| MX2012002415A (en) * | 2009-08-27 | 2012-06-25 | Commw Scient Ind Res Org | Electrical storage device and electrode thereof. |
| TWI466650B (en) * | 2010-11-08 | 2015-01-01 | Ind Tech Res Inst | Cooking utensil and manufacturing method thereof |
| CN202242152U (en) * | 2010-11-15 | 2012-05-30 | 浙江科技学院 | Paper-based composite electromagnetic shielding material |
| CN103496947A (en) * | 2013-09-27 | 2014-01-08 | 广东顺祥节能照明科技有限公司 | Cooking ware for induction cooker and production technology thereof |
| CN203789676U (en) * | 2014-01-26 | 2014-08-27 | 徐宁 | Copper composite-bottom pan suitable for induction cooker |
| CN204133106U (en) * | 2014-06-27 | 2015-02-04 | 李万东 | Electromagnetic oven Copper chafing dish |
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