CN209883785U

CN209883785U - Pot and cooking utensil

Info

Publication number: CN209883785U
Application number: CN201821806759.9U
Authority: CN
Inventors: 万鹏; 陈永君; 曹达华; 陈炜杰; 解志文; 董闯
Original assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Priority date: 2018-07-27
Filing date: 2018-11-02
Publication date: 2020-01-03
Anticipated expiration: 2028-11-02
Also published as: CN110754952A; CN110754952B; CN115444284A

Abstract

The utility model provides a pan and cooking utensil. The cookware comprises a body and a non-stick coating arranged on the inner surface of the body, wherein the thermal conductivity of the non-stick coating is 0.1-3W/mK. Therefore, the thermal conductivity of the non-stick coating in the pot is low, the phenomenon of local overheating hardly occurs in the non-stick coating during heating, the temperature distribution is uniform, the phenomena of pot sticking and burning are hardly caused, the non-stick coating is high in hardness, wear-resistant, scratch-resistant, not easy to drop and durable and excellent in non-stick performance, the physical health of consumers is hardly damaged, the non-stick coating is easy to clean, and the using performance is good.

Description

Pot and cooking utensil

Technical Field

The utility model relates to a cooking equipment technical field, it is specific, relate to pan and cooking utensil.

Background

At present, when a consumer cooks food by using a metal cooking utensil, the heat conductivity coefficient of metal is high, and when the heating is uneven, the phenomenon of pot sticking and burning easily occurs in a region with concentrated heating. After the food is burnt, harmful substances which damage the human health can be generated, and the burnt food is difficult to clean, so that the cooking experience of a user is seriously influenced.

Thus, the current cooking appliances still need to be improved.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, an object of the present invention is to provide a cookware with non-stick coating having low thermal conductivity, high hardness, wear resistance, scratch resistance or better non-stick performance, wherein the temperature distribution in the cookware is uniform, so that the cookware can hardly be burnt when heating food, and the non-stick coating is not easy to fall off, and the cookware has good non-stick performance.

In one aspect of the present invention, the present invention provides a cooking pot. According to the utility model discloses an embodiment, this pan includes the body and sets up the non stick coating on the internal surface of body, the thermal conductivity of non stick coating is 0.1 ~ 3W/mK. Therefore, the non-stick coating in the pot has low heat conductivity, the phenomenon of local overheating hardly occurs in the non-stick coating during heating, the temperature distribution is uniform, the phenomena of pot sticking and burning are hardly caused, the non-stick coating has high hardness, wear resistance, scraping resistance, difficult falling, lasting and excellent non-stick performance, the physical health of consumers is hardly damaged, the non-stick coating is easy to clean, and the using performance is good.

According to an embodiment of the invention, the non-stick coating contains a quasicrystalline material.

According to an embodiment of the present invention, the content of the quasicrystalline material in the non-stick coating is 20-90 wt% based on the total mass of the non-stick coating.

According to an embodiment of the invention, the surface roughness of the outer surface of the non-stick coating is larger than 0 and smaller than 2 microns.

According to an embodiment of the invention, the porosity of the non-stick coating is greater than or equal to 0.1% and less than or equal to 20%.

According to the utility model discloses an embodiment, the thickness of non-stick coating is 10 ~ 500 microns.

According to an embodiment of the invention, the non-stick coating comprises: a first subcoat comprising a first quasicrystalline material therein; a second subcoat disposed on an outer surface of the first subcoat and comprising a second quasicrystalline material; wherein the first quasicrystal particles forming the first quasicrystal material have a larger particle size than the second quasicrystal particles forming the second quasicrystal material.

According to an embodiment of the invention, the first sub-coating and the second sub-coating each independently comprise a plurality of sub-layers.

According to the embodiment of the present invention, the thermal conductivity of the non-stick coating between radii 1/3-2/3 of the bottom of the cookware body is lower than that of the rest of the bottom of the cookware body.

According to an embodiment of the invention, the body comprises a quasicrystalline material.

In another aspect of the present invention, a cooking appliance is provided. According to the utility model discloses an embodiment, this cooking utensil includes preceding pan. The cooking utensil has all the characteristics and advantages of the pot, and the description is omitted.

Drawings

Fig. 1 is a schematic view of a part of a structure of a pot in an embodiment of the present invention.

Fig. 2 is a schematic structural view of a non-stick coating in an embodiment of the invention.

Fig. 3 is a schematic flow chart of a method for preparing quasicrystalline particles according to an embodiment of the present invention.

Detailed Description

Embodiments of the present invention are described in detail below. The following description of the embodiments is merely exemplary in nature and is in no way intended to limit the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.

The present invention has been completed based on the following knowledge and findings of the inventors:

at present, aiming at the problems of pan sticking and burning of a cooking appliance, a teflon coating is usually arranged in the cooking appliance, but the teflon coating is easy to fall off when being touched with appliances such as a shovel, a scouring pad and the like, so that the non-stick performance of the coating is poor, and the burning phenomenon still occurs. In view of the above technical problems, the inventors have conducted intensive studies, and found that a non-stick coating with a low thermal conductivity is disposed in a cooking utensil, so that when the non-stick coating is heated, heat is distributed uniformly in the non-stick coating, and a local overheating phenomenon hardly occurs, thereby greatly reducing the occurrence of a burnt or pot sticking phenomenon, and greatly improving the consumption experience of consumers.

In view of this, in an aspect of the present invention, the present invention provides a pot. According to an embodiment of the present invention, referring to fig. 1, the pot includes a body 100 and the aforementioned non-stick coating 200 disposed on an inner surface of the body, the non-stick coating having a thermal conductivity of 0.1-3W/mK, such as 0.1W/mK, 0.5W/mK, 1.0W/mK, 1.1W/mK, 1.2W/mK, 1.3W/mK, 1.4W/mK, 1.5W/mK, 1.6W/mK, 1.7W/mK, 1.8W/mK, 1.9W/mK, 2.0W/mK, 2.1W/mK, 2.2W/mK, 2.3W/mK, 2.4W/mK, 2.5W/mK, 2.6W/mK, 2.7W/mK, 2.8W/mK, 2.9W/mK, 3W/mK, 3.0W/mK. From this, this pan heat slowly diffuses in the non-stick coating when heating, local overheated phenomenon can hardly appear, and temperature distribution is more even, can hardly appear sticking to the pot and burn the phenomenon, can hardly harm consumer's healthy, and the non-stick performance preferred of non-stick coating, and easy washing greatly improves consumer's consumption and experiences. When the thermal conductivity of the non-stick coating is too low, the heat conduction rate is too low, the waiting time for heating food is too long, and the experience of consumers is poor; when the thermal conductivity of the non-stick coating is too high, the non-stick coating is easy to generate local overheating phenomenon, so that food is easy to burn, the physical health of consumers is damaged, and the consumption experience of the consumers is reduced.

According to an embodiment of the invention, the non-stick coating contains a quasicrystalline material. Therefore, the quasi-crystal material has the advantages of low thermal conductivity, high hardness, wear resistance, scratch resistance, corrosion resistance, strong binding force with a matrix, long service life, capability of keeping non-stick performance for a long time, effective prevention of burning during long-term use and good service performance.

According to an embodiment of the present invention, a quasicrystal is a solid between crystalline and amorphous, having a completely ordered structure, but without the translational symmetry that the crystal should have. The outermost layer of electrons of the quasicrystal has no reconstruction phenomenon, and the quasicrystal is kept to the outer surface by an electronic structure with a pseudo energy gap, so that the quasicrystal has the lowest surface energy in a metal system, water or other substances are not easy to adhere to the surface of the quasicrystal, and the quasicrystal has better non-stick performance due to the property; the quasicrystal has excellent corrosion resistance due to its characteristic of localized electron in the fermi level. The quasicrystal also has the characteristics of high hardness and abrasion resistance, so that the nonstick coating containing the quasicrystal can be compared with a Teflon coating, the hardness is 2.5 times of that of a stainless steel material, and the quasi-crystal can resist the scraping of an iron shovel. Meanwhile, the quasicrystal and the metal matrix are metallurgically bonded, and the bonding force is far higher than the van der Waals force, so that the quasicrystal has long service life without special maintenance.

According to an embodiment of the invention, the quasicrystal has five or ten rotational symmetry features. Therefore, the quasicrystal has the special quasi-periodic arrangement characteristics, the crystal grains of the quasicrystal cannot be arranged in the whole space, and the coating surface formed by the quasicrystal is provided with the concave-convex structure with micron-scale or micro-nanometer-scale gaps formed by the crystal grains, so that the structure can play an excellent hydrophobic role and has a good non-sticking effect.

According to an embodiment of the present invention, the grain shape of the quasicrystal is a polyhedral structure. Therefore, the crystal grains formed by the polyhedral structure cannot be arranged in the whole space, so that the surface of the coating contains a concave-convex structure, the structure can play an excellent hydrophobic effect, the non-stick effect is good, the coating has proper porosity, and the use performance of the non-stick coating can be further improved. In some embodiments of the present invention, the grain shape of the quasicrystal is an icosahedron, a triacontahedron, or a decahedron. Therefore, when the quasicrystal contains the crystal grains with the shapes of icosahedron, thirty-dihedron or decahedron, the quasicrystal has a more compact structure, so that the quasicrystal has higher hardness, is wear-resistant, scratch-resistant and corrosion-resistant, can disperse stress, is easy to diffuse cracks, prevents the cracks from being formed along a fixed direction, has longer service life, is better in non-stick performance, and further ensures that the service performance of the coating containing the quasicrystal is better.

According to an embodiment of the present invention, the material forming the non-stick coating comprises at least two of Al, Fe, Cu, Cr, Ti, Ni and Zr. Therefore, the material can form quasicrystal in the non-stick coating, so that the coating is good in non-stick property, high in hardness, good in wear resistance and scratch resistance and long in service life, almost has no influence on human health, is high in safety and is friendly to the environment. In some embodiments of the present invention, the non-stick coating is formed from a material that is an Al-Cu-Fe alloy, an Al-Cu-Fe-Cr alloy, a Ti-Fe alloy, or a Ti-Ni-Zr alloy. Therefore, the alloy is easier to form quasi-crystal, so that the non-stick coating is better in non-stick property, higher in hardness, better in wear resistance and scratch resistance and longer in service life. In some embodiments of the present invention, the raw material for forming the quasicrystalline material comprises an atomic ratio of (60-70): (15-25): (5-15): (5-15) aluminum, copper, iron and chromium. Therefore, quasi-crystals with proper contents can be formed by the aluminum, the copper, the iron and the chromium in the atomic ratio range, and the service performance of the non-stick coating is better.

In some embodiments of the present invention, the content of the quasicrystalline material in the non-stick coating is 20 to 90 wt% based on the total mass of the non-stick coating. For example, the amount of quasicrystalline material in the non-stick coating can be 20 wt%, 25 wt%, 30 wt%, 35 wt%, 40 wt%, 45 wt%, 50 wt%, 55 wt%, 60 wt%, 65 wt%, 70 wt%, 75 wt%, 80 wt%, 85 wt%, 90 wt%, etc. The inventor finds that the non-stick coating has the advantages of good non-stick performance, low thermal conductivity, high hardness, wear resistance, scratch resistance, corrosion resistance, long service life, high temperature resistance, no release of toxic substances at high temperature, almost no damage to human health, environmental friendliness and high safety. When the content of the quasicrystal material is too low, the non-stick performance of the non-stick coating is low, the heat conductivity is relatively high, the occurrence rate of local overheating phenomenon is relatively high, the hardness is relatively poor, and the service performance is relatively poor; when the content of the quasicrystal material is too high, the non-stick coating is easy to crack, and the service performance is relatively poor.

According to an embodiment of the present invention, the quasicrystalline material in the non-stick coating is formed with quasicrystalline particles having a particle size not larger than 150 microns, such as 145 microns, 140 microns, 135 microns, 130 microns, 125 microns, 120 microns, 115 microns, 110 microns, 105 microns, 100 microns, 95 microns, 90 microns, 85 microns, 80 microns, 75 microns, 70 microns, 65 microns, 60 microns, 55 microns, 50 microns, 45 microns, 40 microns, 35 microns, 30 microns, 25 microns, 20 microns, 15 microns, 10 microns. Therefore, the formed quasicrystal material has a super-hydrophobic structure, the non-stick performance of the non-stick coating can be effectively improved, the hardness of the non-stick coating is high, and the scratch resistance is realized. When the particle size of the quasicrystal particles is too large, the hydrophobicity or the non-adhesiveness of the non-stick coating is relatively poor, and the structure of the outer surface of the non-stick coating is loose, so that the hardness, the wear resistance and the non-adhesiveness of the non-stick coating are relatively low; furthermore, the surface roughness of the non-stick coating is increased due to the excessively large particle size of the quasicrystal particles, and conditioning substances and the like are easily deposited in gaps when the surface roughness is excessively large, so that the non-stick performance of the coating is reduced in a long-time use process, and the use effect is influenced.

According to the embodiment of the present invention, at least one of the organic fluorine resin or the ceramic material may be further contained in the non-stick coating layer. Therefore, the organic fluorine resin (such as Teflon) and the ceramic also have good non-stick performance, and the non-stick performance of the non-stick coating can be further improved by playing a role in cooperation with the quasicrystal material.

According to an embodiment of the present invention, the porosity of the non-stick coating is greater than or equal to 0.1% and less than or equal to 20%, for example the porosity of the non-stick coating may be 0.1%, 1%, 2%, 5%, 8%, 10%, 12%, 15%, 16%, 18%, 20%, etc. Therefore, reasonable pores in the non-stick coating can reduce stress concentration and avoid the generation of coating cracks. When the porosity of the non-stick coating is too small, the stress in the coating is relatively large and is relatively easy to crack, and the thermal conductivity is large, so that the uniformity of thermal conductivity is influenced; when the porosity of the non-stick coating is high, the non-stick coating has relatively low hardness and abrasion resistance, resulting in relatively poor durability of the coating.

According to an embodiment of the present invention, the surface roughness of the outer surface of the non-stick coating is larger than 0 and smaller than 2 microns, such as 0.1 micron, 0.2 micron, 0.3 micron, 0.4 micron, 0.5 micron, 0.6 micron, 0.7 micron, 0.8 micron, 0.9 micron, 1.0 micron, 1.1 micron, 1.2 micron, 1.3 micron, 1.4 micron, 1.5 micron, 1.6 micron, 1.7 micron, 1.8 micron, 1.9 micron, 1.95 micron, etc. Therefore, the surface of the non-stick coating is smooth, the friction coefficient is low, the scratch resistance is better, and the non-stick performance is also better. When the surface roughness of the non-stick coating is too large, water drops can be flatly laid on the surface of the coating due to the capillary action of pores, the hydrophobic angle is reduced, the non-stick property of the non-stick coating is reduced, conditioned matters and the like are easy to deposit in gaps, the non-stick property of the coating can be reduced in the long-time use process, and the use effect is influenced.

According to an embodiment of the invention, the thickness of the non-stick coating is 10-500 microns, such as 10 microns, 11 microns, 12 microns, 13 microns, 14 microns, 15 microns, 16 microns, 17 microns, 18 microns, 19 microns, 20 microns, 30 microns, 40 microns, 50 microns, 80 microns, 100 microns, 120 microns, 150 microns, 160 microns, 180 microns, 200 microns, 210 microns, 220 microns, 250 microns, 270 microns, 280 microns, 290 microns, 300 microns, 310 microns, 320 microns, 350 microns, 360 microns, 380 microns, 390 microns, 400 microns, 410 microns, 420 microns, 430 microns, 440 microns, 450 microns, 460 microns, 470 microns, 480 microns, 490 microns, 500 microns. Therefore, the thermal conductivity of the non-stick coating is low, even if the outer surface of the non-stick coating is damaged, the inner structure of the coating can still effectively exert the non-stick performance, the service life of the coating is effectively prolonged, and better non-stick performance can be kept in the long-term use process. If the thickness of the non-stick coating is too thin, the thermal conductivity of the coating is relatively high, the heat-equalizing effect cannot be effectively achieved, the occurrence rate of local overheating is relatively high, and the service life is relatively short; if the thickness of the non-stick coating is too thick, the structure of the outer surface of the coating is loose, gaps among the convex parts are increased, and the hardness, the wear resistance and the non-stick property of the coating are relatively low.

According to an embodiment of the present invention, referring to fig. 2, the non-stick coating comprises: a first sub-coating 10, the first sub-coating 10 containing a first quasicrystalline material therein; a second sub-coating layer 20, the second sub-coating layer 20 being disposed on an outer surface of the first sub-coating layer 10 and containing a second quasicrystalline material; wherein the first quasicrystal particles 11 forming the first quasicrystal material have a larger particle size than the second quasicrystal particles 21 forming the second quasicrystal material. Therefore, the grain size of the first quasicrystal grains forming the first quasicrystal material is large, the binding force between the first sub-coating and the base body can be increased, the porosity of the formed first sub-coating is large, the thermal conductivity of the first sub-coating can be reduced, the uniformity of heat conduction is improved, the non-stick coating with proper thermal conductivity can be obtained, the grain size of the second quasicrystal grains forming the second quasicrystal material is small, the non-stick coating with proper porosity can be obtained, the surface of the non-stick coating has a super-hydrophobic structure, the non-stick performance is improved, the non-stick coating is prepared by respectively adopting the quasicrystal grains with different grain sizes, the non-stick coating with proper porosity and thermal conductivity can be obtained, the waste of the large-grain-size quasicrystal grains can be reduced, the production efficiency is improved. According to an embodiment of the invention, the first sub-coating and the second sub-coating each independently comprise a plurality of sub-layers. Therefore, the first sub-coating and the second sub-coating with proper thicknesses can be obtained, so that the non-stick coating has proper thermal conductivity and good wear resistance and scratch resistance. In some embodiments of the present invention, each sub-layer is formed by one spraying, and the first sub-coating layer and the second sub-coating layer with appropriate thickness can be formed by multiple spraying. Therefore, the operation is simple and convenient, the realization is easy, and the cost is lower.

According to the utility model discloses an embodiment, pan body bottom radius 1/3-2/3 between the thermal conductivity of non-stick coating is less than the rest of body bottom non-stick coating's thermal conductivity, because position between body part radius 1/3-2/3 corresponds with heating coil or corresponds with flame, and the temperature is higher, sets up between body bottom radius 1/3-2/3 non-stick coating's thermal conductivity is less than the rest of body bottom non-stick coating's thermal conductivity, can make body bottom heat evenly distributed, and the bubble is even, does not have great bubble to produce, consequently reduces the noise of pan culinary art in-process.

According to the utility model discloses an embodiment, this pan can be for the pan that can directly use such as frying pan, saucepan, milk pot, slaughterhouse, pan, also can be the inner bag pan of electricity rice cooker, pressure cooker the body is pan body or cooking equipment inner bag body. Therefore, the application scene is wide, and most cooking requirements of consumers can be met. According to an embodiment of the present invention, the material forming the body comprises at least one of stainless steel, iron, carbon steel, aluminum and ceramic. Therefore, the material has wide sources and lower cost, and the binding force between the material and the non-stick coating is stronger.

For the pot made of stainless steel, the thermal conductivity of the non-stick coating is 0.1-3W/mK, and the non-stick coating is arranged on the surface of the stainless steel pot just like a protective coat is worn on a stainless steel substrate, so that the thermal conductivity of the stainless steel pot is 5-17W/mK, preferably 6-17W/mK, such as 6W/mK, 7W/mK, 8W/mK, 9W/mK, 10W/mK, 11W/mK, 12W/mK, 13W/mK, 14W/mK, 15W/mK, 16W/mK, 17W/mK and the like, the phenomenon of local overheating hardly occurs in the non-stick coating during heating, the temperature is uniformly distributed in the non-stick coating, and the burning phenomenon can be effectively prevented.

According to the utility model discloses an embodiment, also can be doped with the quasicrystal material in the body of above-mentioned pan. Therefore, the hardness and the wear resistance of the cookware can be further improved, the thermal expansion coefficient matching degree between the body and the non-stick coating is higher, the binding force is stronger, the non-stick coating is not easy to drop and wear, and the service life is obviously prolonged.

In another aspect of the present invention, the present invention provides a cooking device. According to the utility model discloses an embodiment, this cooking utensil includes preceding pan. Therefore, the cooking utensil has good non-stick performance, is not easy to crack, has uniform temperature distribution in the cookware, hardly causes the phenomena of pot sticking and burning, has long service life, hardly damages the health of consumers, is easy to clean and has better use performance.

According to the embodiment of the utility model, the cooking utensil is selected from at least one of frying pan, stew pan, milk pot, slaughterhouse, pan, electric rice cooker, pressure cooker. Thereby, most cooking requirements can be met. The cooking utensil can also comprise the structure which the conventional cooking utensil should have besides the non-stick coating, taking a wok as an example for illustration, and the cooking utensil can also comprise a handle and the like.

In another aspect of the present invention, the present invention provides a method of making the aforementioned cookware. According to the utility model discloses an embodiment, this method includes: and spraying the inner surface of the body by using a non-stick coating raw material to obtain the non-stick coating on the inner surface of the body, wherein the thermal conductivity of the non-stick coating is 0.1-3W/mK. Therefore, the method for preparing the cookware is simple and convenient, easy to implement and low in cost, the thermal conductivity of the non-stick coating in the obtained cookware is low, the phenomenon of local overheating hardly occurs in the non-stick coating during heating, the temperature distribution is uniform, the phenomena of pan sticking and burning are hardly caused, the non-stick coating is high in hardness, wear-resistant, scratch-resistant, not easy to drop and durable and excellent in non-stick performance, the physical health of consumers is hardly damaged, and the cookware is easy to clean and has good use performance.

According to the utility model discloses an embodiment, form non-stick coating raw materials can be for forming the raw materials of the aforementioned quasicrystal material, and it is no longer redundantly repeated here.

According to the embodiment of the present invention, before spraying with the raw material of the non-stick coating, referring to fig. 3, the method may further include a step of preparing the raw material into quasi-crystal particles:

s110: and smelting the raw materials for forming the non-stick coating into an alloy ingot.

S120: and atomizing the alloy ingot under a protective atmosphere to prepare powder, so as to obtain quasicrystal powder.

In some embodiments of the present invention, the atomizing for pulverizing powder may include: melting the alloy ingot into a liquid at 1000-1200 ℃, then impacting or otherwise breaking the molten liquid into fine droplets with a rapidly moving fluid (atomizing medium), followed by condensation into a solid powder. Therefore, the method has mature process, is easy to operate and is easy for industrial production.

S130: and spheroidizing the quasicrystalline powder to obtain quasicrystalline particles.

According to the utility model discloses an embodiment, mode that balling was handled can be for aerial fog method, water smoke method, plasma rotation method etc. easy operation, convenience, and is favorable to improving the play powder rate of quasi-crystal granule when follow-up step spraying.

According to the utility model discloses an embodiment, in order to further improve the play powder rate of quasi-crystal granule when spraying, the particle diameter of quasi-crystal granule is less than 150 microns, and is concrete, can carry out the sifting (for example utilize 50 meshes ~ 200 meshes's screen cloth to carry out the sifting) after the balling to obtain the quasi-crystal granule that the particle diameter is less than 150 microns. Therefore, the powder yield of the quasicrystal particles is better during spraying. If the particle size of the quasicrystal particles is too large, not only powder is not easy to be discharged, but also the incompletely melted quasicrystal particles are too many during spraying, and if the incompletely melted quasicrystal particles are sprayed on the surface of the body, the surface of the non-stick coating is uneven, so that the non-stick effect of the coating is relatively low, and the use performance is relatively poor.

According to the utility model discloses an embodiment, in order to improve the adhesive force of non-stick coating on the body, can further include before the spraying and carry out clear step to the body surface, clear concrete method does not have the restriction requirement, as long as can be with body on the surface spot, oil stain or rust etc. clean, reach the requirement of spraying. The utility model discloses an in some embodiments, can adopt modes such as alcohol, trichloroethylene or pure water and ultrasonic wave to clean and dry the body surface, require the body surface can not have rust etc. before the spraying, so, the spraying can improve the adhesive force of quasicrystal on the body greatly after the cleanness. In some embodiments of the present invention, after the cleaning step, the surface of the body may be roughened by performing a sand blasting process to further improve the adhesion of the non-stick coating on the body and prolong the service life of the non-stick coating.

According to the utility model discloses an embodiment, the spraying treatment is plasma spraying. Therefore, the operation is simple and convenient, and the realization is easy. In some embodiments of the present invention, the power of the plasma spraying is 30-40 KW, for example, the power of plasma spraying can be 30KW, 32KW, 34KW, 36KW, 38KW, 40KW and the like, the main gas flow is 50-60L/min, for example, the main steam flow can be 50L/min, 52L/min, 54L/min, 56L/min, 58L/min, 60L/min, etc., the auxiliary gas flow is 20-30L/min, for example, the auxiliary air flow rate can be 20L/min, 22L/min, 24L/min, 26L/min, 28L/min, 30L/min, etc., the powder feeding amount is 15-20 g/min, for example, the powder feed amount may be 15g/min, 16g/min, 17g/min, 18g/min, 19g/min, 20g/min, or the like. Therefore, the non-stick coating with better performance can be formed, and the non-stick coating has stronger binding force with the body and is not easy to fall off. It should be noted that the amount of Al in the feedstock is higher than in the final non-stick coating, since there is partial ablation of the aluminum (Al) during plasma spraying.

According to the embodiment of the present invention, after the spraying treatment, the method further comprises a step of annealing the non-stick coating.

According to the embodiment of the utility model, in order to obtain the non-stick coating that the thermal conductivity is comparatively suitable on the basis of guaranteeing non-stick coating quality, the temperature of annealing treatment is 600 ℃ -800 ℃, for example the temperature of annealing treatment can be 600 ℃, 650 ℃, 700 ℃, 750 ℃ or 800 ℃ and so on. So, anneal in this temperature range, not only can be with in the non-stick coating because the amorphous phase that the spraying converts reconverts into the quasi-crystal under high temperature, make the quasi-crystal seed crystal in the non-stick coating grow up and become the quasi-crystal grain in addition, can not influence the quality of non-stick coating yet, and the quasi-crystal content in the coating that obtains is comparatively suitable, be favorable to obtaining the non-stick coating that the thermal conductivity is comparatively suitable, the size of the quasi-crystal grain that obtains is comparatively suitable, the clearance between the bellying that has the crystalline grain to constitute is also comparatively suitable, make the non-stick coating non-stick performance better. If the annealing temperature is lower than 600 ℃, the content of quasicrystal in the coating is relatively low, the non-stick performance of the non-stick coating is relatively poor, the thermal conductivity of the non-stick coating is relatively large, and the soaking effect is relatively poor; if the annealing temperature is higher than 800 ℃, the non-stick coating has too high content of quasicrystal and is fragile, and during the annealing process, the too high temperature can cause too high thermal stress in the coating, and the too high thermal stress can cause the non-stick coating to crack, so that the service performance of the coating is relatively poor, and the production cost of the non-stick coating is high.

According to the embodiment of the present invention, since the non-stick coating contains a metal element (such as aluminum) which is easily oxidized, the annealing treatment is performed under vacuum or a protective atmosphere (such as nitrogen or argon). Therefore, in the annealing process, easily oxidized metal elements such as aluminum and the like can be protected from being oxidized, the content of quasicrystal in the non-stick coating is further improved, and the thermal conductivity of the non-stick coating is more appropriate.

According to the utility model discloses an embodiment, in order to obtain the comparatively suitable non-stick coating of thermal conductivity, the condition of annealing is: the temperature rising rate is 5-100 ℃/min, for example, the temperature rising rate can be 5 ℃/min, 10 ℃/min, 20 ℃/min, 30 ℃/min, 40 ℃/min, 50 ℃/min, 60 ℃/min, 70 ℃/min, 80 ℃/min, 90 ℃/min or 100 ℃/min, etc., the heat preservation time is 0.5-10 hours, for example, the heat preservation time can be 0.5 hour, 1 hour, 3 hours, 5 hours, 7 hours, 9 hours or 10 hours, etc., the temperature reduction rate is 5-100 ℃/min, for example, the temperature reduction rate can be 5 ℃/min, 10 ℃/min, 20 ℃/min, 30 ℃/min, 40 ℃/min, 50 ℃/min, 60 ℃/min, 70 ℃/min, 80 ℃/min, 90 ℃/min or 100 ℃/min, etc., the temperature is reduced to 200-300 ℃, for example, 200 ℃, 230 ℃, 250 ℃, 270 ℃ or 300 ℃, and then furnace-cooled to room temperature. Therefore, the quasi-crystal content is more appropriate, the non-adhesiveness of the non-stick coating is greatly improved, and the thermal conductivity of the non-stick coating is more appropriate. If the temperature rising rate or the temperature reduction rate is too low, the process duration can be prolonged; if the temperature rising rate or the temperature reduction rate is too high, the quality of the non-stick coating is influenced, such as cracking of the coating and the like; if the heat preservation time is too short, the amorphous phase can not be fully converted into quasi-crystal or the crystal seed can not be completely grown into crystal grains, and the service performance of the non-stick coating is relatively poor; if the holding time is too long, the non-stick coating may crack and be costly.

According to an embodiment of the present invention, after annealing, a step of polishing the non-stick coating may be further included.

According to the utility model discloses an embodiment, the mode of polishing treatment can be for polishing or cutting etc. easy operation, convenience, and can obtain comparatively glossy surface, and when using cleaning appliances such as shovel, scouring pad for a long time to wash, non-stick coating is not fragile, can give cooking utensil lasting non-stick nature.

According to the embodiment of the utility model, above-mentioned method of preparing the pan easy operation, convenience easily realize, can obtain the suitable non-stick coating of quasicrystal content at the body internal surface, and this non-stick coating's thermal conductivity and porosity are comparatively suitable, and the non-stick performance preferred, hardness is great, wear-resisting, resistant scraping, corrosion-resistant, life is longer, and is high temperature resistant, can not release the noxious material under high temperature, can hardly damage the health, relatively friendly to the environment, and the security is higher.

Embodiments of the present application are described below.

Examples

Non-stick coating thickness test method: the non-stick coating was subjected to scanning electron microscopy to measure the thickness of the non-stick coating.

The thermal conductivity test method comprises the following steps: and testing by adopting a flat plate heat flow method.

The non-stick performance test method comprises the following steps: the adopted method for testing the non-stickiness of the fried eggs has the test method and standard of ASTM D5470-2006GB "thin thermal conductivity solid electric insulating material heat transfer performance test standard".

It is to be noted that in the following examples and comparative examples, stainless steel having a size of 25.4mm in diameter and 4mm in thickness was used as a body, and the thermal conductivity was measured for a pot.

Example 1

The pot preparation method comprises the following steps:

1. according to the atomic number ratio, Al: cu: fe: cr ═ 60-70: (15-25): (5-15): (5-15) melting the alloy raw materials into an alloy ingot;

2. atomizing to prepare powder: and preparing the quasicrystal powder by adopting powder preparation equipment in a vacuum or protective atmosphere environment.

3. Spheroidizing: and spheroidizing and screening the quasicrystal powder to obtain quasicrystal particles with the particle size of less than 150 micrometers.

4. Cleaning the surface of the body: cleaning and drying the surface of the body by adopting modes of alcohol, trichloroethylene or pure water, ultrasonic waves and the like, so that the surface of the body has no rust before plasma spraying, and then sanding treatment is carried out to coarsen the surface of the body.

5. Plasma spraying: spraying 1 layer of quasicrystal particles on the surface of the body by plasma spraying to form a quasicrystal coating, wherein the spraying power is 30-50 KW (such as 30KW, 32KW, 34KW, 36KW, 38KW, 40KW, 42KW, 44KW, 46KW, 48KW, 50KW and the like), the main gas flow is 50-60L/min (such as 50L/min, 52L/min, 54L/min, 56L/min, 58L/min, 60L/min and the like), the auxiliary gas flow is 20-30L/min (such as 20L/min, 22L/min, 24L/min, 26L/min, 28L/min, 30L/min and the like), and the powder delivery is 15-20 g/min (such as 15g/min, 16g/min, 17g/min, 50L/min, 50KW and the like), the auxiliary gas flow is 20L/min, 18g/min, 19g/min, 20g/min, etc.).

6. Annealing: annealing the quasicrystal coating in an argon protective atmosphere, wherein the annealing temperature is 600-800 ℃ (for example, the annealing temperature can be 600 ℃, 650 ℃, 700 ℃, 750 ℃ or 800 ℃, and the like), the heating rate is 20-30 ℃/min (such as 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 and 30 ℃/min), the heat preservation time is 1-3 hours (such as 1, 1.5, 2.0, 2.5 and 3.0 hours), the cooling rate is 10-20 ℃/min (such as 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 and 20 ℃/min) to 300 ℃, and then furnace cooling is carried out to the room temperature to obtain the coating.

7. Polishing: the annealed coating is polished to a surface roughness Ra of less than 2 microns (e.g., 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9 microns) to provide a smoother surface coating.

The thickness of the obtained quasicrystalline coating (i.e. the non-stick coating) was 20 microns.

Example 2

The pot manufacturing method is the same as example 1, except that in this example, 10 layers of quasicrystal particles are sprayed on the surface of the body by plasma spraying. The thickness of the obtained quasicrystalline coating was 90 microns.

Example 3

The pot manufacturing method is the same as example 1, except that in this example, 30 layers of quasicrystal particles are sprayed on the surface of the body by plasma spraying. The thickness of the obtained quasicrystalline coating was 550 microns.

Example 4

The preparation method of the pot is the same as that of the embodiment 1, except that the particle size of the quasicrystal particles in the embodiment is 150-300 μm.

Example 5

The pot manufacturing method is the same as example 1, except that in this example, plasma spraying is adopted to spray 50 layers of quasicrystal particles on the surface of the body.

Comparative example 1

The stainless steel body surface in this comparative example was not coated with a coating.

The performance test data for the non-stick coatings of examples 1-5 and comparative example 1 are shown in table 1.

TABLE 1

	Coating thickness (micrometer)	Thermal conductivity (W/mK)	Non-stickiness of fried egg
				Example 1	20	17	Ⅱ
Example 2	90	11	Ⅱ
				Example 3	300	8	Ⅰ
Example 4	200	10	Ⅱ
				Example 5	600	5	Ⅱ
Comparative example 1	Is free of	18	Ⅲ

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A cookware, comprising:

a body;

the non-stick coating is arranged on the inner surface of the body, and the thermal conductivity of the non-stick coating is 0.1-3W/mK.

2. The cookware according to claim 1, wherein said non-stick coating contains a quasicrystalline material.

3. The cookware according to claim 2, wherein the surface roughness of the outer surface of said non-stick coating is greater than 0 and less than 2 microns.

4. The cookware according to claim 2, wherein said non-stick coating has a porosity of 0.1% or more and 20% or less.

5. The cookware according to claim 2, wherein the thickness of said non-stick coating is 10-500 μm.

6. The cookware according to claim 2, wherein said non-stick coating comprises:

a first subcoat comprising a first quasicrystalline material therein;

a second subcoat disposed on an outer surface of the first subcoat and comprising a second quasicrystalline material;

wherein the first quasicrystal particles forming the first quasicrystal material have a larger particle size than the second quasicrystal particles forming the second quasicrystal material.

7. The cookware according to claim 6, wherein said first and second subcoats each independently comprise a plurality of sub-layers.

8. The cookware of claim 1 wherein the thermal conductivity of said non-stick coating between radii 1/3-2/3 of said cookware body bottom is lower than the thermal conductivity of said non-stick coating of the rest of said body bottom.

9. The cookware according to claim 1, wherein said body contains a quasicrystalline material.

10. A cooking appliance comprising a pot according to any of claims 1-9.