CN108324119B

CN108324119B - Pot, preparation method thereof and cooking utensil

Info

Publication number: CN108324119B
Application number: CN201710032113.3A
Authority: CN
Inventors: 李康; 曹达华; 李兴航; 杨玲; 李洪伟
Original assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Priority date: 2017-01-17
Filing date: 2017-01-17
Publication date: 2020-05-15
Anticipated expiration: 2037-01-17
Also published as: CN108324119A

Abstract

The invention provides a pot, a preparation method thereof and a cooking utensil, wherein the pot comprises the following components: the pot body is made of a non-magnetic material or a weak magnetic material; the magnetic conduction layer is made of magnetic conduction materials containing magnetic conduction metal particles and is attached to the outer surface of the pot body; the rust-proof layer is attached on the magnetic conduction layer. According to the cookware, the pot body made of the non-magnetic or weak-magnetic materials is provided with the double-coating structure of the magnetic conduction layer and the anti-rust layer, so that the cookware has an excellent electromagnetic heating function and can effectively prevent corrosion for a long time, the market competitiveness of products is increased, and the market popularization of the products is facilitated; in addition, the magnetic conduction layer is made of the magnetic conduction material containing the magnetic conduction metal particles, and the outer surface of the magnetic conduction layer has certain roughness, so that the adsorption and combination effect of the antirust layer and the magnetic conduction layer is better, and the antirust layer is prevented from falling off.

Description

Pot, preparation method thereof and cooking utensil

Technical Field

The invention relates to the technical field of cooking appliances, in particular to a pot, a preparation method of the pot and a cooking appliance comprising the pot.

Background

At present, nonmagnetic or weak magnetic conductivity materials such as aluminum alloy, 304 stainless steel, ceramics and the like are widely applied to household appliances, but most pots made of the materials do not have a good electromagnetic heating function, so that the application of the pots is limited.

Disclosure of Invention

In order to solve at least one of the above technical problems, an object of the present invention is to provide a pot.

Another object of the present invention is to provide a method for manufacturing the above mentioned pot.

Still another object of the present invention is to provide a cooking appliance including the above-mentioned pot.

In order to achieve the above object, an embodiment of a first aspect of the present invention provides a pot, including: the pot comprises a pot body, a pot cover and a pot cover, wherein the pot body is made of a non-magnetic conductive material or a weak magnetic conductive material; the magnetic conduction layer is made of magnetic conduction materials containing magnetic conduction metal particles and is attached to the outer surface of the pot body; and the antirust layer is attached to the magnetic conduction layer.

According to the cookware provided by the embodiment of the first aspect of the invention, the cookware body made of the non-magnetic or weak magnetic materials is provided with the double-coating structure of the magnetic conduction layer and the anti-rust layer, so that the cookware not only has an excellent electromagnetic heating function, but also can effectively prevent corrosion for a long time, thereby increasing the market competitiveness of products and facilitating the market popularization of the products. Specifically, the pot body is made of a non-magnetic conductive material or a weak magnetic conductive material, and the magnetic conductive layer is additionally arranged on the outer surface of the pot body, so that the magnetic conductive performance of the pot is effectively improved, the electromagnetic heating efficiency of the pot is remarkably increased, the pot made of the traditional non-magnetic conductive material or the weak magnetic conductive material such as aluminum alloy, 304 stainless steel, ceramic and the like also has an excellent electromagnetic heating function, and the application field of the pot made of the materials is further expanded; an anti-rust layer is additionally arranged on the magnetic conduction layer, and can effectively protect the magnetic conduction layer to achieve the effect of long-term corrosion resistance, so that the service life of the product is effectively prolonged, and the market competitiveness of the product is further increased; in addition, the magnetic conduction layer is made of the magnetic conduction material containing the magnetic conduction metal particles, and the outer surface of the magnetic conduction layer has certain roughness, so that the adsorption and combination effect of the antirust layer and the magnetic conduction layer is better, and the antirust layer is prevented from falling off.

In addition, the cookware in the above embodiment provided by the invention can also have the following additional technical features:

in the technical scheme, the magnetic conduction layer is a cold spraying coating containing magnetic conduction metal particles, and the roughness of the magnetic conduction layer is 3-12 microns.

The magnetic conduction layer is a cold spraying coating, namely the magnetic conduction layer is made by adopting a cold spraying process, the compactness of magnetic conduction metal particles can be ensured by cold spraying, and the surface has certain roughness while the magnetic conduction condition is met, so that the anti-rust layer can be conveniently attached to the surface of the anti-rust layer without falling off; in addition, the cold spraying process has high production efficiency, does not affect the base material, has relatively low processing cost and is suitable for large-scale production, so that the production and manufacturing cost of the product is reduced; and the coating with low porosity can be prepared, so that the compactness of the internal structure of the magnetic conduction layer can be effectively improved by controlling the technological parameters of cold spraying, and the coating can obtain ideal electromagnetic heating efficiency on the basis of ensuring a certain coating thickness.

It can be understood that cold spraying is also called aerodynamic spraying method, and the principle is that high-pressure gas is utilized to generate supersonic flow through a convergent-divergent tube, and powder particles are axially input into high-speed airflow and impact a matrix in a completely solid state after being accelerated; the powder particles undergo large plastic flow deformation to deposit on the substrate surface to form a dense coating. During spraying, the sprayed particles impact the surface of the matrix at high speed (500-1200 m/s), ions are not melted in the whole process, the solid state is kept, and the particles are subjected to plastic deformation polymerization to form the coating, so that the matrix material is not changed by the coating, the coating and the matrix are mainly combined together in a mechanical connection mode, the coating tissue is consistent with the substrate tissue, and the binding force between the coating tissue and the substrate tissue is effectively improved. In addition, the cold spray technique has the following advantages: because the high-speed particles have strong shot blasting effect on the surface of the matrix or the coating when colliding, the coating is generally in a pressure stress state, which is beneficial to the deposition of a thicker coating, and the thickness can reach the centimeter level; since the powder undergoes no significant thermal processes with substantially no change in texture, the undeposited particles can be recycled.

In any one of the above technical solutions, the pot body includes a pot body and a pot bottom, and the magnetic conduction layer is attached to the lower portion of the outer surface of the pot body and the outer surface of the pot bottom.

Because electromagnetic heating equipment such as an induction cooker is generally positioned below a pot, and the heat generation quantity of the magnetic conduction layer is related to the distance between the electromagnetic heating equipment and the magnetic conduction layer, only the lower part of the pot can generate relatively strong electromagnetic heating effect generally, and the magnetic conduction layer is arranged on the lower part of the outer surface of the pot body and the outer surface of the pot bottom, so that the electromagnetic heating requirement of the pot can be met, and the product cost can be saved. Of course, the purpose of the present invention can be achieved only by arranging the magnetic conduction layer on the outer surface of the pan bottom or on the outer surface of the whole pan without departing from the design concept and spirit of the present invention, and thus, those skilled in the art should understand that these technical solutions are all within the protection scope of the present invention.

In any of the above technical solutions, the thickness of the magnetic conductive layer is 200 μm to 2000 μm.

The thickness of the magnetic conduction layer is not less than 200 mu m, so that the condition that the electromagnetic heating is uneven due to the fact that the magnetic conduction layer is too thin can be avoided; the thickness of the magnetic conduction layer is not more than 2000 mu m, so that the phenomenon that the cookware is too heavy or the cost is higher due to the fact that the magnetic conduction layer is too thick can be avoided.

In any of the above technical solutions, the porosity of the magnetically permeable layer is not greater than 2%.

The porosity is one of the important performance indexes of the coating, and the lower the porosity, the denser the coating and the higher the quality. Therefore, the porosity of the magnetic conduction layer is not more than 2% (namely less than or equal to 2%), the magnetic conduction layer is guaranteed to have a compact structure, the magnetic conduction layer is further guaranteed to have high magnetic conductivity and high hardness, and the magnetic conduction layer is guaranteed to have strong electromagnetic heating induction and long service life.

In any one of the above technical solutions, the thickness of the rust-preventive layer is 10 μm to 50 μm.

The thickness of the anti-rust layer is not less than 10 mu m, so that the situation that the service life of a product is shortened because the anti-rust layer is easily worn through due to the fact that the anti-rust layer is too thin can be avoided; the thickness of the anti-rust layer is not more than 50 mu m, so that the situation that the heating efficiency of the magnetic conduction layer is reduced or the product cost is too high due to the over-thick anti-rust layer can be avoided.

In any one of the above technical solutions, the porosity of the rust-preventive layer is not more than 5%.

The porosity of the antirust layer is not more than 5% (namely not more than 5%), so that the antirust layer has a compact structure, and the antirust layer can achieve the long-term anticorrosion effect.

In any of the above technical solutions, the rust-preventive layer is a spray metal coating.

The antirust metal is heated into a molten state and then sprayed onto the magnetic conductive metal layer with certain roughness, so that the antirust layer is favorably attached.

In any of the above technical solutions, the magnetic conductive layer includes one or more of a ferromagnetic coating, a nickel magnetic coating, a cobalt magnetic coating, and an iron-silicon magnetic coating; and/or the rust preventive layer comprises an organic heat-resistant coating or an inorganic heat-resistant coating.

Iron, nickel, cobalt and the like are excellent magnetic conductivity metals, so that the ferromagnetic coating, the nickel magnetic coating, the cobalt magnetic coating or the iron-silicon magnetic coating has higher magnetic conductivity, so that the cookware has higher electromagnetic heating efficiency, the materials are easy to obtain, and the market competitiveness of the product is further increased.

The antirust layer comprises an organic heat-resistant coating or an inorganic heat-resistant coating, and the antirust layer has excellent high-temperature resistance on the basis of excellent antirust effect, so that the service life of the coating is further prolonged, and the service life can be up to 2-3 years through detection.

In any one of the above technical solutions, the pot further includes: the rough layer is formed on the outer surface of the pot body, and the magnetic conduction layer is attached to the rough layer.

The setting on coarse layer for form unevenness's structure on the surface of pot body, can further improve the cohesion between magnetic conduction layer and the pot body like this, further reduce the probability that magnetic conduction layer drops, thereby further prolong the life of coating and pan.

In any of the above technical solutions, the pot is an inner pot.

When the cooker is used as an inner cooker, the cooker can be used for cooking utensils such as electric cookers, electric pressure cookers and the like.

Embodiments of the second aspect of the invention provide a cooking appliance comprising a pot as described in any of the embodiments of the first aspect.

In the cooking appliance provided in the embodiment of the second aspect of the present invention, the inner pot is the pot described in any one of the embodiments of the first aspect, so that the cooking appliance has the beneficial effects described in any one of the embodiments, and details are not repeated herein.

In the technical scheme, the cooking appliance is an electric cooker or an electric pressure cooker.

An embodiment of a third aspect of the present invention provides a method for manufacturing a cookware, which is used for manufacturing the cookware in any one of the embodiments of the first aspect, and includes: step S10: preparing the pot body by using a non-magnetic material or a weak magnetic material; step S30: preparing a magnetic conduction layer on the outer surface of the pot body; step S40: and preparing an anti-rust layer on the magnetic conduction layer.

According to the preparation method of the cookware provided by the embodiment of the third aspect of the invention, firstly, the cookware body is prepared by using the non-magnetic conductive material or the weak magnetic conductive material, then the magnetic conductive layer consisting of the magnetic conductive material containing the magnetic conductive metal particles is prepared on the outer surface of the cookware body, and then the rust-proof layer is prepared on the magnetic conductive layer, so that the cookware with the double-coating structure of the magnetic conductive layer and the rust-proof layer can be obtained, and the preparation process is simple; the magnetic conduction layer is additionally arranged on the outer surface of the manufactured pot, so that the magnetic conduction performance of the pot is effectively improved, the electromagnetic heating efficiency of the pot is obviously increased, and the pot manufactured by traditional non-magnetic materials or weak-magnetic materials such as aluminum alloy, 304 stainless steel, ceramic and the like also has an excellent electromagnetic heating function, so that the application field of the pot manufactured by the materials is enlarged; an anti-rust layer is additionally arranged on the magnetic conduction layer, and can effectively protect the magnetic conduction layer to achieve the effect of long-term corrosion resistance, so that the service life of the product is effectively prolonged, and the market competitiveness of the product is further increased; in addition, the magnetic conduction layer is made of the magnetic conduction material containing the magnetic conduction metal particles, and the outer surface of the magnetic conduction layer has certain roughness, so that the adsorption and combination effect of the antirust layer and the magnetic conduction layer is better, and the antirust layer is prevented from falling off.

In addition, the preparation method of the pot in the embodiment provided by the invention can also have the following additional technical characteristics:

in the above technical solution, in the step S30, a cold spray process is adopted to spray a powder coating onto the outer surface of the pot body, so that the powder coating forms the magnetic conductive layer.

The powder coating is sprayed on the outer surface of the pot body by adopting a cold spraying process to prepare the magnetic conduction layer, the compactness of magnetic conduction metal particles can be ensured by cold spraying, and the surface is ensured to have certain roughness while magnetic conduction conditions are met, so that the anti-rust layer can be conveniently attached to the surface of the pot body without falling off. The roughness of the prepared magnetic conduction layer is 3-12 mu m through detection, and the combination with the anti-rust layer is very good.

In addition, the cold spraying process has high production efficiency, does not affect the base material, has relatively low processing cost and is suitable for large-scale production, so that the production and manufacturing cost of the product is reduced; and the coating with low porosity can be prepared, so that the compactness of the internal structure of the magnetic conduction layer can be effectively improved by controlling the technological parameters of cold spraying, and the coating can obtain ideal electromagnetic heating efficiency on the basis of ensuring a certain coating thickness. Specifically, the cold spraying process can be divided into high-pressure cold spraying and low-pressure cold spraying according to the pressure, and both the high-pressure cold spraying and the low-pressure cold spraying have respective advantages, such as high efficiency of the high-pressure cold spraying and low noise of the low-pressure cold spraying, and can be selected according to specific conditions in the actual production process.

In any of the above technical solutions, the powdery paint includes one or more of iron powder, nickel powder, cobalt powder, and iron-silicon powder.

Iron, nickel, cobalt and the like are excellent magnetic conductivity metals, so that a magnetic conductivity layer with excellent magnetic conductivity can be prepared by spraying iron powder, nickel powder, cobalt powder or iron-silicon powder on the outer surface of the pot body by adopting a cold spraying process, so that the pot has higher electromagnetic heating efficiency, the coatings are easy to obtain, and the market competitiveness of the product is further increased.

In any of the above technical solutions, in the step S30, the parameters of the cold spraying process are as follows: the working gas is air, helium, nitrogen or mixed gas, the injection pressure is 0.5MPa to 3MPa, the injection temperature is 0K to 873K, and the gas velocity is 0.4m³/min～2m³Min, the powder conveying speed is 2 kg/h-15 kg/h, the spraying distance is 10 mm-50 mm, the consumed power is 5 kW-25 kW, and the powder granularity is 10 mu m-50 mu m.

Through multiple tests and analyses, technicians of the company find that parameters such as working gas, injection pressure, injection temperature, gas speed, powder conveying speed, injection distance, consumed power, powder granularity and the like all affect the quality of the finally formed magnetic conduction layer, so that the selection of appropriate process parameters is very important. Such as: the deposition efficiency and the porosity of the coating are reduced due to the fact that the powder conveying speed is too high, interaction of particles in a spray pipe is enhanced due to the fact that the powder conveying speed is too high, the particles are likely to melt and adhere in a spray gun due to the fact that the temperature of the particles is increased through friction, the speed of the particles in the spray pipe is affected, and the deposition efficiency is affected; the jet distance has a direct relation with the deposition efficiency because the vertical speed of the sprayed particles reaching the surface of the substrate is influenced by the jet distance, the jet distance is too large to enable the particles to reach enough kinetic energy to form a coating, and the jet distance is too small to reduce the speed of the particles and the deposition efficiency under the action of shock waves formed in an impact area between the substrate and the spray gun; the particle size and morphology of the powder will affect the particle velocity, which directly affects the deposition efficiency of the particles, because cold spraying relies mainly on strong plastic deformation from high-speed impact of the particles to deposit the coating, the higher the velocity of the particles, the more dense and high quality the formed coating; the spraying pressure and the relative movement speed of the substrate and the spray gun have certain influence on the deposition efficiency and the porosity of the coating; the spraying temperature and the spraying pressure can also influence the bonding rate, compactness and other properties of the coating. Of course, it should be understood by those skilled in the art that the parameters of the coating are different for different pots, so the parameters of the cold spraying process are not limited to the above values, and can be adjusted as required in the actual production process.

In any one of the above technical solutions, the pot body includes a pot body and a pot bottom, wherein in the step S30, the magnetic conductive layer is prepared on the lower portion of the outer surface of the pot body and the outer surface of the pot bottom.

Because electromagnetic heating equipment such as an induction cooker is generally positioned below a pot, and the heat generation quantity of the magnetic conduction layer is related to the distance between the electromagnetic heating equipment and the magnetic conduction layer, only the lower part of the pot can generate relatively strong electromagnetic heating effect generally, and the magnetic conduction layer is arranged on the lower part of the outer surface of the pot body and the outer surface of the pot bottom, so that the electromagnetic heating requirement of the pot can be met, and the product cost can be saved. In the specific preparation process, a shielding jig can be used for shielding the area which does not need to be sprayed, and finally, a magnetic coating with a certain thickness is formed in the required area.

Of course, the purpose of the present invention can be achieved only by arranging the magnetic conduction layer on the outer surface of the pan bottom or on the outer surface of the whole pan without departing from the design concept and spirit of the present invention, and thus, those skilled in the art should understand that these technical solutions are all within the protection scope of the present invention.

In any one of the above technical solutions, in the step S30, the thickness of the magnetic conduction layer is 200 μm to 2000 μm.

In any one of the above technical solutions, in the step S30, the porosity of the magnetically permeable layer is not greater than 2%.

The porosity of the magnetic conduction layer is not more than 2%, so that the magnetic conduction layer is guaranteed to have a compact structure, the magnetic conduction layer is further guaranteed to have high magnetic conductivity and high hardness, and the magnetic conduction layer is guaranteed to have strong electromagnetic heating induction and long service life.

In any one of the above technical solutions, in the step S40, the rust preventive layer is prepared on the magnetic conductive layer by using a cold spray process, a conventional spray process, or a coating process.

The anti-rust layer can be prepared on the magnetic conduction layer by adopting a cold spraying process, a melting and jetting process, a conventional spraying process or a coating process, and the prepared anti-rust layer and the magnetic conduction layer are mainly connected together in a mechanical combination mode. For example, when the antirust coating is prepared by a spray-coating process, the antirust metal is heated to be in a molten state and then sprayed onto the magnetic conductive metal layer with certain roughness, so that the antirust coating is favorably attached. Of course, it should be understood by those skilled in the art that the process for preparing the rust preventive layer is not limited to the above-mentioned ones, and other processes can be used, which are not listed here, but are within the scope of the present invention.

In any one of the above technical solutions, in the step S40, the rust preventive layer includes an organic heat-resistant coating or an inorganic heat-resistant coating.

The anti-rust layer comprises an organic heat-resistant coating or an inorganic heat-resistant coating, and the prepared anti-rust layer has excellent high-temperature resistance on the basis of excellent anti-rust effect, so that the service life of the coating is further prolonged, and the detection shows that the service life can be as long as 2-3 years.

In any one of the above technical solutions, in the step S40, the thickness of the rust preventive layer is 10 μm to 50 μm.

In any one of the above technical solutions, in the step S40, the porosity of the rust preventive layer is not more than 5%.

The porosity of the antirust layer is not more than 5%, so that the antirust layer has a compact structure, and the antirust layer can achieve a long-term anticorrosion effect.

In any one of the above technical solutions, before the magnetic conductive layer is prepared on the outer surface of the pot body, the method further includes: step S20: carrying out sand blasting treatment on the outer surface of the pot body to form a rough layer on the outer surface of the pot body; wherein, in the step S30, the magnetic conductive layer is prepared on the rough layer.

Before the spraying coating, carry out sand blasting to the surface of pot body earlier, make its surface on form rough layer, rough layer has formed unevenness's structure on the surface of pot body, can further improve the cohesion between magnetic conduction layer and the pot body like this, further reduces the probability that magnetic conduction layer drops to the further life who prolongs coating and pan. In the specific preparation process, the pot body can be cleaned and decontaminated according to the condition before the sand blasting treatment; after the sand blasting treatment, high-pressure air flow is adopted to blow off the residual fine powder particles on the surface of the sand blasting treatment; the surface to be sprayed can be preheated according to the situation before cold spraying after sand blasting.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a partial structural schematic view of a pot according to some embodiments of the present invention;

FIG. 2 is a schematic flow diagram of a method of making cookware according to some embodiments of the invention;

fig. 3 is a schematic flow chart of a preparation method of a pot according to another embodiment of the present invention.

Wherein, the corresponding relationship between the reference numbers and the component names in fig. 1 is:

10 pot bodies, 20 magnetic conduction layers and 30 anti-rust layers.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A pot, a preparation method thereof, and a cooking appliance according to some embodiments of the present invention will be described with reference to fig. 1 to 3.

As shown in fig. 1, a cookware provided by an embodiment of the first aspect of the present invention includes: the pot comprises a pot body 10, a magnetic conduction layer 20 and an anti-rust layer 30.

Specifically, the pan body 10 is made of a non-magnetic conductive material or a weakly magnetic conductive material; the magnetic conduction layer 20 is made of magnetic conduction materials containing magnetic conduction metal particles and is attached to the outer surface of the pot body 10; the rust-preventive layer 30 is attached to the magnetically permeable layer 20.

Preferably, the pot body 10 includes a pot body and a pot bottom, and the magnetic conduction layer 20 is attached to the lower portion of the outer surface of the pot body and the outer surface of the pot bottom.

According to the cookware provided by the embodiment of the first aspect of the invention, the cookware has an excellent electromagnetic heating function and can effectively prevent corrosion for a long time by arranging the double-coating structure of the magnetic conduction layer 20+ the anti-rust layer 30 on the cookware body 10 made of the non-magnetic or weak magnetic conduction material, so that the market competitiveness of the product is increased, and the market popularization of the product is facilitated.

Specifically, the pot body 10 is made of a non-magnetic conductive material or a weak magnetic conductive material, and the magnetic conductive layer 20 is additionally arranged on the outer surface of the pot body 10, so that the magnetic conductive performance of the pot is effectively improved, the electromagnetic heating efficiency of the pot is remarkably increased, the pot made of the traditional non-magnetic conductive material or the weak magnetic conductive material such as aluminum alloy, 304 stainless steel, ceramic and the like also has an excellent electromagnetic heating function, and the application field of the pot made of the materials is further expanded; the anti-rust layer 30 is additionally arranged on the magnetic conduction layer 20, and the anti-rust layer 30 can effectively protect the magnetic conduction layer 20 to achieve the effect of long-term corrosion resistance, so that the service life of the product is effectively prolonged, and the market competitiveness of the product is further increased; in addition, the magnetic conduction layer is made of the magnetic conduction material containing the magnetic conduction metal particles, and the outer surface of the magnetic conduction layer has certain roughness, so that the adsorption and combination effect of the antirust layer and the magnetic conduction layer is better, and the antirust layer is prevented from falling off.

Because electromagnetic heating equipment such as electromagnetism stove is generally located the below of pan, and the heat production of magnetic conduction layer 20 is relevant rather than the distance between electromagnetic heating equipment, consequently generally only the lower part of pan can produce the electromagnetic heating effect that relatively stronger, and the heating contribution to the pan is great, so only set up magnetic conduction layer 20 in the lower part of the surface of pot body and the surface of pot bottom, can enough satisfy the electromagnetic heating needs of pan, can practice thrift the cost of product again.

Of course, the magnetic conduction layer 20 can be disposed on the outer surface of the pan bottom or on the outer surface of the entire pan, which can achieve the purpose of the present invention without departing from the design concept and spirit of the present invention, and thus, those skilled in the art should understand that these technical solutions are all within the protection scope of the present invention.

In some embodiments of the present invention, the magnetically permeable layer 20 is a cold spray coating comprising magnetically permeable metal particles, and the roughness of the magnetically permeable layer 20 is 3 μm to 12 μm.

In the above embodiment, the magnetic conduction layer 20 is a cold spray coating, that is, the magnetic conduction layer 20 is made by a cold spray process, the cold spray coating can ensure the compactness of the magnetic conduction metal particles, and the surface has certain roughness while meeting the magnetic conduction condition, so that the anti-rust layer 30 can be conveniently attached to the surface without falling off; in addition, the cold spraying process has high production efficiency, does not affect the base material, has relatively low processing cost and is suitable for large-scale production, so that the production and manufacturing cost of the product is reduced; and the coating with low porosity can be prepared, so that the compactness of the internal structure of the magnetic conduction layer 20 can be effectively improved by controlling the technological parameters of cold spraying, and the coating can obtain ideal electromagnetic heating efficiency on the basis of ensuring a certain coating thickness.

It can be understood that cold spraying is also called aerodynamic spraying method, and the principle is that high-pressure gas is utilized to generate supersonic flow through a convergent-divergent tube, and powder particles are axially input into high-speed airflow and impact a matrix in a completely solid state after being accelerated; the powder particles undergo large plastic flow deformation to deposit on the substrate surface to form a dense coating. During spraying, the sprayed particles impact the surface of the matrix at high speed (500-1200 m/s), ions are not melted in the whole process, the solid state is kept, and the particles are subjected to plastic deformation polymerization to form the coating, so that the matrix material is not changed by the coating, the coating and the matrix are mainly combined together in a mechanical connection mode, the coating tissue is consistent with the substrate tissue, and the binding force between the coating tissue and the substrate tissue is effectively improved. In addition, the cold spray technique has the following advantages: because the high-speed particles have strong shot blasting effect on the surface of the matrix or the coating when colliding, the coating is generally in a pressure stress state, which is beneficial to the deposition of a thicker coating, and the thickness can reach centimeter level; since the powder undergoes no significant thermal processes with substantially no change in texture, the undeposited particles can be recycled.

Preferably, the thickness of the magnetic conductive layer 20 is 200 μm to 2000 μm (e.g., 200 μm, 500 μm, 800 μm, 100 μm, 1300 μm, 1500 μm, 1700 μm, 2000 μm, etc.).

Preferably, the porosity of the magnetically permeable layer 20 is no greater than 2% (e.g., 0.3%, 0.6%, 0.8%, 1%, 1.2%, 1.5%, 1.8%, 2%, etc.).

Preferably, the rust preventive layer 30 has a thickness of 10 μm to 50 μm (e.g., 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, etc.).

Preferably, the rust preventive layer 30 has a porosity of not more than 5% (e.g., 1%, 2%, 3%, 4%, 5%, etc.).

The thickness of the magnetic conduction layer 20 is not less than 200 μm, so that the condition that the electromagnetic heating is uneven due to the fact that the magnetic conduction layer 20 is too thin can be avoided; the thickness of the magnetic conduction layer 20 is not more than 2000 mu m, so that the phenomenon that the cookware is too heavy or the cost is higher due to the fact that the magnetic conduction layer 20 is too thick can be avoided.

The porosity is one of the important performance indexes of the coating, and the lower the porosity, the denser the coating and the higher the quality. Therefore, the porosity of the magnetic conduction layer 20 is not more than 2%, so that the magnetic conduction layer 20 has a compact structure, the magnetic conduction layer 20 has high magnetic conductivity and high hardness, and the magnetic conduction layer 20 has high electromagnetic heating induction and long service life.

The thickness of the anti-rust layer 30 is not less than 10 mu m, so that the situation that the service life of a product is shortened because the anti-rust layer 30 is easily worn through due to the fact that the anti-rust layer 30 is too thin can be avoided; the thickness of the anti-rust layer 30 is not more than 50 μm, so that the situation that the heating efficiency of the magnetic conduction layer 20 is reduced or the product cost is too high due to the over-thickness of the anti-rust layer 30 can be avoided.

The porosity of the antirust layer 30 is not more than 5%, so that the antirust layer 30 is guaranteed to have a compact structure, and the antirust layer 30 is guaranteed to achieve a long-term anticorrosion effect.

Optionally, the magnetically permeable layer 20 includes one or more of a ferromagnetic coating, a nickel magnetic coating, a cobalt magnetic coating, and an iron-silicon magnetic coating.

Alternatively, the rust preventive layer 30 includes an organic heat-resistant coating or an inorganic heat-resistant coating.

The antirust layer 30 comprises an organic heat-resistant coating or an inorganic heat-resistant coating, so that the antirust layer 30 has excellent high-temperature resistance on the basis of excellent antirust effect, the service life of the coating is further prolonged, and the service life can be up to 2-3 years through detection.

Alternatively, the rust preventive layer 30 is a sprayed metal coating.

The antirust metal is heated into a molten state and then sprayed onto the magnetic conductive metal layer with certain roughness, which is beneficial to the adhesion of the antirust layer 30.

Further, the pan still includes: rough layer, the rough layer is formed on the surface of pot body 10, and magnetic conduction layer 20 attaches on the rough layer.

The setting on coarse layer for form unevenness's structure on pot body 10's the surface, can further improve the cohesion between magnetic conduction layer 20 and the pot body 10 like this, further reduce the probability that magnetic conduction layer 20 drops, thereby further prolong the life of coating and pan.

In any of the above embodiments, the pot is an inner pot.

Embodiments of the second aspect of the present invention provide a cooking appliance (not shown in the figures) comprising a pot as in any of the embodiments of the first aspect.

In the cooking appliance provided in the embodiment of the second aspect of the present invention, the inner pot is the pot in any one of the embodiments of the first aspect, so that the cooking appliance has the beneficial effects of any one of the embodiments, and details are not repeated herein.

Specifically, the cooking appliance is an electric cooker, an electric pressure cooker or other cooking appliances.

An embodiment of the third aspect of the present invention provides a method for manufacturing a pot, as shown in fig. 2, for manufacturing the pot of any one of the embodiments of the first aspect, including:

step S10: preparing the pan body 10 by using a non-magnetic conductive material or a weak magnetic conductive material;

step S30: preparing a magnetic conduction layer 20 on the outer surface of the pot body 10;

step S40: and preparing an antirust layer 30 on the magnetic conduction layer 20.

According to the preparation method of the cookware provided by the embodiment of the third aspect of the invention, firstly, the cookware body 10 is prepared by using the non-magnetic conductive material or the weak magnetic conductive material, then the magnetic conductive layer 20 made of the magnetic conductive material containing the magnetic conductive metal particles is prepared on the outer surface of the cookware body 10, and then the rust-proof layer 30 is prepared on the magnetic conductive layer 20, so that the cookware with the double-coating structure of the magnetic conductive layer 20 and the rust-proof layer 30 can be obtained, and the preparation process is simple; the magnetic conduction layer 20 is additionally arranged on the outer surface of the manufactured pot, so that the magnetic conduction performance of the pot is effectively improved, the electromagnetic heating efficiency of the pot is obviously increased, and the pot manufactured by traditional non-magnetic materials or weak magnetic materials such as aluminum alloy, 304 stainless steel, ceramic and the like also has an excellent electromagnetic heating function, so that the application field of the pot manufactured by the materials is enlarged; the anti-rust layer 30 is additionally arranged on the magnetic conduction layer 20, and the anti-rust layer 30 can effectively protect the magnetic conduction layer 20 to achieve the effect of long-term corrosion resistance, so that the service life of the product is effectively prolonged, and the market competitiveness of the product is further increased; in addition, the magnetic conduction layer is made of the magnetic conduction material containing the magnetic conduction metal particles, and the outer surface of the magnetic conduction layer has certain roughness, so that the adsorption and combination effect of the antirust layer and the magnetic conduction layer is better, and the antirust layer is prevented from falling off.

Further, as shown in fig. 3, before the magnetic conductive layer 20 is prepared on the outer surface of the pan body 10, the method further includes:

step S20: performing sand blasting on the outer surface of the pan body 10 to form a rough layer on the outer surface of the pan body 10; wherein, in step S30, the magnetically permeable layer 20 is prepared on the roughened layer.

Before the spraying coating, carry out sand blasting to the surface of pot body 10 earlier, make its surface on form rough layer, rough layer has formed unevenness's structure on the surface of pot body 10, can further improve the cohesion between magnetic conduction layer 20 and the pot body 10 like this, further reduces the probability that magnetic conduction layer 20 drops to further prolong the life of coating and pan. In the specific preparation process, the pan body 10 can be cleaned and decontaminated according to the condition before the sand blasting treatment; after the sand blasting treatment, high-pressure air flow is adopted to blow off the residual fine powder particles on the surface of the sand blasting treatment; the surface to be sprayed can be preheated according to the situation before cold spraying after sand blasting.

Preferably, in step S30, a cold spray process is used to spray the powder paint onto the outer surface of the pan body 10, so that the powder paint forms the magnetic conductive layer 20. Optionally, the powdered coating includes one or more of iron powder, nickel powder, cobalt powder, and iron-silicon powder.

Alternatively, in step S40, the rust preventive layer 30 is prepared on the magnetically permeable layer 20 using a cold spray process, a conventional spray process, or a coating process. Alternatively, the raw material of the rust preventive layer 30 includes an organic heat-resistant powder or an inorganic heat-resistant powder.

The powder coating is sprayed on the outer surface of the pot body 10 by adopting a cold spraying process to prepare the magnetic conduction layer 20, the compactness of magnetic conduction metal particles can be ensured by cold spraying, and the surface has certain roughness while the magnetic conduction condition is met, so that the anti-rust layer 30 can be conveniently attached to the surface without falling off. The roughness of the prepared magnetic conduction layer 20 is 3-12 mu m through detection, and the combination with the anti-rust layer 30 is very good.

In addition, the cold spraying process has high production efficiency, does not affect the base material, has relatively low processing cost and is suitable for large-scale production, so that the production and manufacturing cost of the product is reduced; and the coating with low porosity can be prepared, so that the compactness of the internal structure of the magnetic conduction layer 20 can be effectively improved by controlling the technological parameters of cold spraying, and the coating can obtain ideal electromagnetic heating efficiency on the basis of ensuring a certain coating thickness.

Specifically, the cold spraying process can be divided into high-pressure cold spraying and low-pressure cold spraying according to the pressure, and both the high-pressure cold spraying and the low-pressure cold spraying have respective advantages, such as high efficiency of the high-pressure cold spraying and low noise of the low-pressure cold spraying, and can be selected according to specific conditions in the actual production process.

Iron, nickel, cobalt and the like are excellent magnetic conductivity metals, so that iron powder, nickel powder, cobalt powder or iron-silicon powder is sprayed on the outer surface of the pot body 10 by adopting a cold spraying process, and the magnetic conductive layer 20 with excellent magnetic conductivity can be prepared, so that the pot has higher electromagnetic heating efficiency, and the coatings are easy to obtain, and further the market competitiveness of the product is increased.

The anti-rust layer 30 can be prepared on the magnetic conduction layer 20 by adopting a cold spraying process, a melting jetting process (or a thermal spraying process), a conventional spraying process or a coating process, and the prepared anti-rust layer 30 and the magnetic conduction layer 20 are mainly connected together in a mechanical combination manner. For example, when the antirust coating is prepared by a spray-coating process, the antirust metal is heated to be in a molten state and then sprayed onto the magnetic conductive metal layer with certain roughness, so that the antirust coating is favorably attached. Of course, it should be understood by those skilled in the art that the process for preparing the rust preventive layer 30 is not limited to the above-mentioned ones, and other processes can be used, which are not listed here, but are within the scope of the present invention.

The raw materials of the anti-rust layer 30 comprise organic heat-resistant powder or inorganic heat-resistant powder, so that the prepared anti-rust layer 30 has excellent high-temperature resistance on the basis of excellent anti-rust effect, the service life of the coating is further prolonged, and the service life can be up to 2-3 years through detection.

In step S30, the parameters of the cold spraying process are: the working gas is air, helium, nitrogen or mixed gas, the injection pressure is 0.5 MPa-3 MPa (such as 0.5MPa, 1MPa, 1.5MPa, 2MPa, 2.5MPa, 3MPa, etc.), the injection temperature is 0K-873K, and the gas velocity is 0.4m³/min～2m³Min (e.g. 0.4 m)³/min、0.8m³/min、1.2m³/min、1.6m³/min、2m³Min, etc.), a powder conveying speed of 2kg/h to 15kg/h (e.g., 2kg/h, 5kg/h, 8kg/h, 10kg/h, 12kg/h, 15kg/h, etc.), a spraying distance of 10mm to 50mm (e.g., 10mm, 30mm, 50mm, etc.), a power consumption of 5kW to 25kW (e.g., 5kW, 10kW, 15kW, 20kW, 25kW, etc.), and a powder particle size of 10 μm to 50 μm (e.g., 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, etc.).

Through a plurality of tests and analyses, technicians of the company find that parameters such as working gas, injection pressure, injection temperature, gas speed, powder conveying speed, injection distance, consumed power, powder granularity and the like all affect the quality of the finally formed magnetic conduction layer 20, so that the selection of appropriate process parameters is very important.

Such as: the deposition efficiency and the porosity of the coating are reduced due to the fact that the powder conveying speed is too high, interaction of particles in a spray pipe is enhanced due to the fact that the powder conveying speed is too high, the particles are likely to melt and adhere in a spray gun due to the fact that the temperature of the particles is increased through friction, the speed of the particles in the spray pipe is affected, and the deposition efficiency is affected; the jet distance has a direct relation with the deposition efficiency because the vertical speed of the sprayed particles reaching the surface of the substrate is influenced by the jet distance, the jet distance is too large to enable the particles to reach enough kinetic energy to form a coating, and the jet distance is too small to reduce the speed of the particles and the deposition efficiency under the action of shock waves formed in an impact area between the substrate and the spray gun; the particle size and morphology of the powder will affect the particle velocity, which directly affects the deposition efficiency of the particles, because cold spraying relies mainly on strong plastic deformation from high-speed impact of the particles to deposit the coating, the higher the velocity of the particles, the more dense and high quality the formed coating; the spraying pressure and the relative movement speed of the substrate and the spray gun have certain influence on the deposition efficiency and the porosity of the coating; the spraying temperature and the spraying pressure can also influence the bonding rate, compactness and other properties of the coating.

Of course, it should be understood by those skilled in the art that the parameters of the coating are different for different pots, so the parameters of the cold spraying process are not limited to the above values, and can be adjusted as required in the actual production process.

In any of the above embodiments, preferably, the pan body 10 includes a pan body and a pan bottom, wherein in step S30, the magnetic conductive layer 20 is prepared on the lower portion of the outer surface of the pan body and the outer surface of the pan bottom.

Because electromagnetic heating equipment such as electromagnetism stove is generally located the below of pan, and the heat production of magnetic conduction layer 20 is relevant rather than the distance between electromagnetic heating equipment, consequently generally only the lower part of pan can produce the electromagnetic heating effect that relatively stronger, and the heating contribution to the pan is great, so only set up magnetic conduction layer 20 in the lower part of the surface of pot body and the surface of pot bottom, can enough satisfy the electromagnetic heating needs of pan, can practice thrift the cost of product again. In the specific preparation process, a shielding jig can be used for shielding the area which does not need to be sprayed, and finally, a magnetic coating with a certain thickness is formed in the required area.

Preferably, in step S30, the thickness of the magnetic conduction layer 20 is 200 μm to 2000 μm.

Preferably, in step S30, the porosity of the magnetically permeable layer 20 is not greater than 2%.

Preferably, in step S40, the thickness of the rust preventive layer 30 is 10 μm to 50 μm.

Preferably, in step S40, the porosity of the rust preventive layer 30 is not more than 5%.

The porosity of the magnetic conduction layer 20 is not more than 2%, so that the magnetic conduction layer 20 has a compact structure, the magnetic conduction layer 20 has high magnetic conductivity and high hardness, and the magnetic conduction layer 20 has high electromagnetic heating induction and long service life.

The following describes the preparation method of the cookware provided by the invention in detail with reference to some specific embodiments.

Example one

The pot body is made of aluminum, the magnetic conduction layer is a ferromagnetic coating, the anti-rust layer is an aluminum oxide anti-rust layer, and the specific preparation method of the pot comprises the following steps:

carrying out sand blasting treatment on the surface to be sprayed of the pot body by adopting fine iron sand particles, and shielding the position which does not need to be sprayed by using a clamp so as to form a surface with certain roughness, namely a rough layer (the roughness Ra of the rough layer is 60-80 mu m), and then blowing off the residual fine powder particles on the surface of the sand-blasted surface by using high-pressure airflow;

preheating the surface to be sprayed by using oxygen-acetylene flame, wherein the preheating temperature is 150 ℃, and the preheating time is 2-3 min;

the magnetic coating is prepared on the preheating surface of the bottom of the cookware in a spraying area by adopting a high-pressure cold spraying technology, the spraying material is single Fe powder, and the specific technological parameters are as follows: the working gas is nitrogen, the injection pressure is 1.6MPa to 2.0MPa, the injection temperature is 673K to 773K, and the gas velocity is 1.5m³/min～1.8m³Min, the powder conveying speed is 10 kg/h-12 kg/h, the spraying distance is 35 mm-40 mm, the consumed power is 10 kW-15 kW, and the powder granularity is 10 mu m-40 mu m;

then, plasma spraying is used for preparing the antirust coating on the surface of the magnetic coating, and the spraying material is Al₂O₃Fine powder (grain size is 10-20 μm), and the specific technological parameters are as follows: the spraying current is 450-500A, the spraying voltage is 60-80V, and the argon flow is 3m³/h～4m³H, hydrogen flow 0.15m³/h～0.2m³The air pressure of the spray gun is 0.3MPa to 0.4MPa, and the spraying distance is 200mm to 250 mm;

and finally obtaining the aluminum pot with the ferromagnetic coating and the aluminum oxide anti-rust layer, wherein the thickness of the prepared ferromagnetic coating is 300-400 mu m, the porosity of the coating is less than or equal to 1%, the thickness of the prepared aluminum oxide anti-rust layer is 20-30 mu m, and the porosity of the coating is less than or equal to 3%.

Example two

The pot body is made of aluminum, the magnetic conduction layer is an iron-nickel magnetic coating, the anti-rust layer is a fluororesin anti-rust layer, and the specific preparation method of the pot comprises the following steps:

preparing a magnetic coating on a preheating surface at the bottom of a pot in a region to be sprayed by adopting a high-pressure cold spraying technology, wherein the spraying material is mixed powder of Fe and Ni, and the specific technological parameters are as follows: the working gas is nitrogen, the injection pressure is 1.6MPa to 1.8MPa, the injection temperature is 573K to 673K, and the gas velocity is 1.5m³/min～1.8m³Min, the powder conveying speed is 8 kg/h-10 kg/h, the spraying distance is 30 mm-35 mm, the consumed power is 10 kW-12 kW, and the powder granularity is 10 mu m-40 mu m;

and then, preparing a layer of fluororesin antirust protective coating on the surface of the magnetic coating by adopting conventional spraying, wherein the spraying material is PTFE (polytetrafluoroethylene).

Finally obtaining the aluminum pot with the iron and nickel magnetic coating and the fluororesin anti-rust layer, wherein the thickness of the prepared ferromagnetic coating is 200-300 mu m, the porosity of the coating is less than or equal to 1 percent, the thickness of the prepared PTFE anti-rust layer is 20-30 mu m, and the porosity of the coating is less than or equal to 5 percent.

EXAMPLE III

The pot body is made of a ceramic material, the magnetic conduction layer is a nickel magnetic coating, the anti-rust layer is an inorganic silicon anti-rust layer, and the specific preparation method of the pot comprises the following steps:

cleaning the surface to be sprayed of the ceramic pot by using alcohol, removing oil stains on the surface to be sprayed by using oxygen-acetylene flame flow, and performing sand blasting treatment on the surface to be sprayed to obtain the surface roughness of the matrix, wherein the roughness is Ra 60-80 mu m;

the magnetic coating is prepared at the bottom of the pot by using a low-pressure cold spraying technology, the spraying material is Ni powder, and the specific process parameters are as follows: the working gas is helium, the injection pressure is 0.5MPa to 0.8MPa, the injection temperature is 673K to 773K, and the gas speed is highDegree of 0.4m³/min～0.5m³Min, the powder conveying speed is 2 kg/h-3 kg/h, the spraying distance is 20 mm-30 mm, the consumed power is 5 kW-10 kW, and the powder granularity is 20 mu m-40 mu m;

preparing an inorganic silicon high-temperature-resistant coating on the surface of the magnetic coating by adopting conventional spraying;

and finally obtaining the ceramic pot with the nickel magnetic coating and the inorganic silicon anti-rust layer, wherein the thickness of the prepared nickel magnetic coating is 200-300 mu m, the porosity of the coating is less than or equal to 1%, the thickness of the prepared inorganic silicon anti-rust layer is 20-30 mu m, and the porosity of the coating is less than or equal to 5%.

Example four

The pot body is made of aluminum alloy, the magnetic conduction layer is an iron-silicon magnetic coating, the anti-rust layer is an aluminum oxide anti-rust layer, and the specific preparation method of the pot comprises the following steps:

carrying out sand blasting treatment on the surface to be sprayed of the pot body by adopting fine iron sand particles, and shielding the position which does not need to be sprayed by using a clamp so as to form a surface with certain roughness, namely a rough layer (the roughness Ra of the rough layer is 60-80 mu m), and then blowing off the residual fine powder particles on the surface of the sand blasted surface by using high-pressure airflow;

preparing a magnetic coating on the preheated surface at the bottom of the cookware in a region to be sprayed by adopting a low-pressure cold spraying technology, wherein the spraying material is Fe-Si powder, and the specific technological parameters are as follows: the working gas is air, the injection pressure is 0.8MPa to 1.2MPa, the injection temperature is 773K to 873K, and the gas velocity is 0.5m³/min～0.9m³Min, the powder conveying speed is 3 kg/h-5 kg/h, the spraying distance is 10 mm-25 mm, the consumed power is 15 kW-20 kW, and the powder granularity is 10 mu m-20 mu m;

then preparing an aluminum oxide anti-rust layer on the surface of the magnetic coating by adopting a conventional spraying process;

and finally obtaining the aluminum alloy pot with the iron-silicon magnetic coating and the aluminum oxide anti-rust layer, wherein the thickness of the prepared iron-silicon magnetic coating is 600-800 mu m, the porosity of the coating is less than or equal to 2%, the thickness of the prepared aluminum oxide anti-rust layer is 10-20 mu m, and the porosity of the coating is less than or equal to 4%.

EXAMPLE five

The pot body is made of 304 stainless steel, the magnetic conduction layer is a cobalt magnetic coating, the anti-rust layer is a fluororesin anti-rust layer, and the specific preparation method of the pot comprises the following steps:

the magnetic coating is prepared on the preheating surface of the bottom of the cookware in a region to be sprayed by adopting a low-pressure cold spraying technology, the spraying material is single Co powder, and the specific technological parameters are as follows: the working gas is mixed gas, the injection pressure is 1.2 MPa-1.5 MPa, the injection temperature is 373K-573K, and the gas velocity is 0.9m³/min～1.5m³Min, the powder conveying speed is 5 kg/h-8 kg/h, the spraying distance is 40 mm-50 mm, the consumed power is 20 kW-25 kW, and the powder granularity is 15 mu m-35 mu m;

then preparing a layer of fluororesin antirust coating on the surface of the magnetic coating by adopting a coating process;

and finally obtaining the 304 stainless steel pot with the cobalt magnetic coating and the fluororesin anti-rust layer, wherein the thickness of the prepared cobalt magnetic coating is 1200-1500 mu m, the porosity of the coating is less than or equal to 1.5%, the thickness of the prepared fluororesin anti-rust layer is 30-40 mu m, and the porosity of the coating is less than or equal to 2%.

EXAMPLE six

The pot body is made of 304 stainless steel, the magnetic conduction layer is an iron and cobalt magnetic coating, the anti-rust layer is an inorganic silicon anti-rust layer, and the specific preparation method of the pot comprises the following steps:

preparing a magnetic coating on a preheating surface at the bottom of a pot in a region to be sprayed by adopting a high-pressure cold spraying technology, wherein the spraying material is mixed powder of single Fe and Co, and the specific technological parameters are as follows: the working gas is helium, the spraying pressure is 2.0MPa to 3.0MPa, the spraying temperature is 173K to 373K, and the gas velocity is 1.8m³/min～2.0m³Min, the powder conveying speed is 12 kg/h-15 kg/h, the spraying distance is 25 mm-35 mm, the consumed power is 18 kW-20 kW, and the powder granularity is 40 mu m-50 mu m;

then preparing an inorganic silicon high-temperature-resistant coating on the surface of the magnetic coating by adopting a coating process;

finally, obtaining the aluminum pot with the iron and cobalt magnetic coating and the inorganic silicon anti-rust layer, wherein the thickness of the prepared iron and cobalt magnetic coating is 1800-2000 mu m, the porosity of the coating is less than or equal to 0.5%, the thickness of the prepared inorganic silicon anti-rust layer is 40-50 mu m, and the porosity of the coating is less than or equal to 1%.

In conclusion, the cookware provided by the invention has the advantages that the cookware body made of the non-magnetic or weak-magnetic materials is provided with the double-coating structure of the magnetic conduction layer and the antirust layer, so that the cookware has an excellent electromagnetic heating function and can effectively prevent corrosion for a long time, the market competitiveness of products is increased, and the market popularization of the products is facilitated. Specifically, the pot body is made of a non-magnetic conductive material or a weak magnetic conductive material, and the magnetic conductive layer is additionally arranged on the outer surface of the pot body, so that the magnetic conductive performance of the pot is effectively improved, the electromagnetic heating efficiency of the pot is remarkably increased, the pot made of the traditional non-magnetic conductive material or the weak magnetic conductive material such as aluminum alloy, 304 stainless steel, ceramic and the like also has an excellent electromagnetic heating function, and the application field of the pot made of the materials is further expanded; an anti-rust layer is additionally arranged on the magnetic conduction layer, and can effectively protect the magnetic conduction layer to achieve the effect of long-term corrosion resistance, so that the service life of the product is effectively prolonged, and the market competitiveness of the product is further increased; in addition, the magnetic conduction layer is made of the magnetic conduction material containing the magnetic conduction metal particles, and the outer surface of the magnetic conduction layer has certain roughness, so that the adsorption and combination effect of the antirust layer and the magnetic conduction layer is better, and the antirust layer is prevented from falling off.

In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cookware, comprising:

the pot comprises a pot body, a pot cover and a pot cover, wherein the pot body is made of a non-magnetic conductive material or a weak magnetic conductive material;

the magnetic conduction layer is made of magnetic conduction materials containing magnetic conduction metal particles and is attached to the outer surface of the pot body; and

the antirust layer is attached to the magnetic conduction layer;

the pot body comprises a pot body and a pot bottom, and the magnetic conduction layer is attached to the lower portion of the outer surface of the pot body and the outer surface of the pot bottom.

2. The cookware according to claim 1,

the magnetic conduction layer is a cold spraying coating containing magnetic conduction metal particles, and the roughness of the magnetic conduction layer is 3-12 microns.

3. The cookware according to claim 1 or 2,

the thickness of the magnetic conduction layer is 200-2000 mu m.

4. The cookware according to claim 1 or 2,

the porosity of the magnetic conduction layer is not more than 2%.

5. The cookware according to claim 1 or 2,

the thickness of the anti-rust layer is 10-50 μm; and/or

The porosity of the antirust layer is not more than 5%.

6. The cookware according to claim 1 or 2,

the anti-rust layer is a spray metal coating.

7. The cookware according to claim 1 or 2,

the magnetic conduction layer comprises one or more of a ferromagnetic coating, a nickel magnetic coating, a cobalt magnetic coating and an iron-silicon magnetic coating; and/or

The rust-preventive layer comprises an organic heat-resistant coating or an inorganic heat-resistant coating.

8. The pot according to claim 1 or 2, further comprising:

the rough layer is formed on the outer surface of the pot body, and the magnetic conduction layer is attached to the rough layer.

9. Cooking appliance, characterized in that it comprises a pot according to any of claims 1 to 8.

10. A method of making a cookware for making the cookware of any of claims 1 to 9 comprising:

step S10: preparing the pot body by using a non-magnetic material or a weak magnetic material;

step S30: preparing a magnetic conduction layer on the outer surface of the pot body;

step S40: preparing an antirust layer on the magnetic conduction layer;

the pot body comprises a pot body and a pot bottom, wherein in the step S30, the magnetic conduction layer is prepared on the lower portion of the outer surface of the pot body and the outer surface of the pot bottom.

11. The method for manufacturing a pot according to claim 10,

in the step S30, a cold spray process is used to spray a powder paint onto the outer surface of the pot body, so that the powder paint forms the magnetic conductive layer.

12. The method for manufacturing a pot according to claim 11,

the powdery paint comprises one or more of iron powder, nickel powder, cobalt powder and iron-silicon powder.

13. The method for manufacturing a pot according to claim 11,

in step S30, the parameters of the cold spraying process are: the working gas is air, helium, nitrogen or mixed gas, the spraying pressure is 0.5MPa to 3MPa, the spraying temperature is 0K to 873K, the gas speed is 0.4m3/min to 2m3/min, the powder conveying speed is 2kg/h to 15kg/h, the spraying distance is 10mm to 50mm, the consumed power is 5kW to 25kW, and the powder granularity is 10 mu m to 50 mu m.

14. The method of making a pot according to any of claims 11 to 13,

in the step S30, the thickness of the magnetic conductive layer is 200 μm to 2000 μm.

15. The method of making a pot according to any of claims 11 to 13,

in the step S30, the porosity of the magnetically permeable layer is not greater than 2%.

16. The method of making a pot according to any of claims 11 to 13,

in the step S40, the antirust layer is prepared on the magnetic conductive layer by using a cold spray process, a conventional spray process, or a coating process.

17. The method for manufacturing a pot according to claim 16,

in the step S40, the rust preventive layer includes an organic heat-resistant coating or an inorganic heat-resistant coating.

18. The method of making a pot according to any of claims 11 to 13,

in the step S40, the thickness of the rust-preventive layer is 10 to 50 μm.

19. The method of making a pot according to any of claims 11 to 13,

in the step S40, the antirust layer has a porosity of not more than 5%.

20. The method of manufacturing a pot according to any of claims 11 to 13, further comprising, before manufacturing the magnetically permeable layer on the outer surface of the pot body:

step S20: carrying out sand blasting treatment on the outer surface of the pot body to form a rough layer on the outer surface of the pot body;

wherein, in the step S30, the magnetic conductive layer is prepared on the rough layer.