CN220778123U - Physical non-stick structure and cooking utensil - Google Patents

Abstract

The application discloses a physical non-stick structure and a cooking utensil, which are applied to the surface of a metal substrate, wherein the surface of the metal substrate is provided with a plurality of concave parts and convex parts, the convex parts are in a hilly shape surrounding the periphery of the concave parts, the surface roughness of the concave parts is smaller than that of the convex parts, and at least part of the surfaces of the concave parts and/or part of the surfaces of the convex parts are provided with physical vapor deposition layers. The physical non-stick structure and the cooking utensil have non-stick performance, and compared with the traditional method, the method has simple process and low cost.

Description

Physical non-stick structure and cooking utensil

Technical Field

The application relates to the technical field of cooking appliances, in particular to a physical non-stick structure and a cooking appliance.

Background

The non-stick performance of the existing cooking utensil is realized by coating a chemical coating, generally polytetrafluoroethylene, on the surface of the cooking utensil. The polytetrafluoroethylene coating is non-toxic in normal state, but will begin to volatilize when the heated temperature of the coating reaches 260 ℃ and will begin to decompose when the temperature reaches 350 ℃. The use temperature of the non-stick pan with polytetrafluoroethylene coating generally cannot exceed 250 ℃. However, in general, the heating temperature of a cooking appliance such as a wok often exceeds 260 ℃, so that the safety hazard exists. In addition, the coating is not wear-resistant, the risk of falling exists, and the coating is easy to be eaten by mistake along with food, so that the health is affected.

At present, a honeycomb-structured frying pan adopts stainless steel as a base material, uniformly distributed grooves are processed on the surface of the base material, a layer of polytetrafluoroethylene is sprayed on the surface of the whole base material, and finally polytetrafluoroethylene on the surface of the base material between the grooves is polished and removed in a polishing mode, so that the polytetrafluoroethylene in the grooves is only reserved to realize the nonstick property of the surface of the pan. The stainless steel material has the advantages that the strength is good, the stainless steel material can resist the scraping of the turner, certain non-tackiness can be realized, the stainless steel without polytetrafluoroethylene coating has no non-tackiness, in addition, the polytetrafluoroethylene has the risks of decomposition and falling off, and potential safety hazards exist.

Disclosure of utility model

In order to solve the technical problems, the application provides the physical non-stick structure and the cooking utensil, which can improve the non-stick performance of the surface of the metal material and have the advantages of wear resistance and difficult falling.

In a first aspect, the present application provides a physical non-adhesive structure, applied to a surface of a metal substrate, where the surface of the metal substrate is provided with a concave-convex structure including a plurality of concave portions and convex portions, the convex portions are in a hilly shape surrounding the concave portions, the surface roughness of the concave portions is smaller than that of the convex portions, and at least a part of the concave portions and/or a part of the surface of the convex portions are provided with a physical vapor deposition layer.

By adopting the technical scheme, firstly, the concave-convex structure with a plurality of concave parts and convex parts is shot-blasted on the surface of the metal base material, and the concave-convex structure can form a hydrophobic structure on the surface of the metal base material, but the hydrophobic structure is not wear-resistant. After the concave-convex structure is shot-blasted, a physical vapor deposition layer is plated on the surface of the concave-convex structure, and the physical vapor deposition layer has the characteristic of wear resistance.

The traditional non-stick structure is to process grooves on the metal surface by a chemical etching method and then spray chemical coating to realize oil locking and non-stick performance. However, the chemical coating is not wear-resistant, and the chemical coating is easy to fall off after being scraped by tableware such as a turner, so that the safety is affected, the chemical coating is polished after being sprayed, and the coating on the protrusions around the grooves is polished to remove the leaked metal substrate. Since the protrusions polished off the chemical coating leaked out of the metal substrate, the protrusions were not non-tacky. And the roughness of the groove processed by the chemical etching method is higher than that of the bulge around the groove, the surface strength of the structure is lower, the bonding property with a Physical Vapor Deposition (PVD) layer is poorer, and the bonding property is required to be improved by adding a transition layer between the chemical coating and the deposition layer.

According to the technical scheme, the concave part and the convex part can be processed through processing technologies such as shot blasting or rolling, so that the surface hardening of the metal substrate can be realized, the surface roughness of the concave part is smaller than that of the convex part, the convex part is in a hilly shape surrounding the periphery of the concave part, the bonding performance with the physical vapor deposition layer is improved, and the surface strength is good. Therefore, the physical non-stick structure processed on the surface of the metal substrate ensures that the whole surface of the metal has the characteristics of wear resistance and non-stick.

With reference to the first aspect, in a further aspect, the recess and the protrusion are formed as a unitary structure with the metal substrate, and the physical vapor deposition layer is in direct contact with at least a portion of the recess and/or a portion of the protrusion surface.

By adopting the technical scheme, the concave-convex structure with a plurality of concave parts and convex parts is processed on the surface of the metal base material directly through the modes of shot blasting or rolling, and the like, so that the strength of the integrated structure is higher, and the falling risk brought by the two-body structure can be reduced. The physical vapor deposition layer is directly contacted with the concave-convex structure, and a transition layer is not arranged in the middle, so that the processing procedures can be reduced, the processing cost is reduced, the bonding performance is good, and the wear-resistant and non-sticky performance can be achieved.

With reference to the first aspect, in a further aspect, at least part of the concave portion and/or at least part of the convex portion surface is provided with an electrolytic layer, and the electrolytic layer and the physical vapor deposition layer are in direct contact.

Through adopting above-mentioned technical scheme, make pan internal surface structure micron, nanometer V type, C type, U type or the concave body of random size under the effect of electrolysis, can further reduce the area of contact of edible material and the pan body, add the repulsion dual function that the air thermal expansion produced flow in the concave body, can realize non-sticky effect well. In addition, the electrolysis can form an oxide film on the surface of the shot blasting layer so as to change the color and improve the performance of the shot blasting layer and improve the performance and grade of the product.

With reference to the first aspect, in a further aspect, at least a part of the concave portion and/or a part of the convex portion surface is provided with a plasma polishing layer, and the plasma polishing layer and the physical vapor deposition layer are in direct contact.

By adopting the technical scheme, the micro-or nano-scale concave-convex structure can be further processed on the surface of the shot blasting layer by plasma polishing, so that the hydrophobic property is further improved, and the non-sticking property of the surface of a product is improved. The plasma polishing can also improve the brightness of the surface of the product and the quality of the product.

With reference to the first aspect, in a further aspect, the vickers hardness of the metal substrate is greater than or equal to 100, and the concave portions are irregularly distributed on the surface of the metal substrate.

Experimental tests show that the shot blasting and Physical Vapor Deposition (PVD) processing technology has better non-stick performance and wear resistance when applied to the surface of a metal substrate with the Vickers hardness being more than 100. The concave parts are irregularly distributed on the surface of the metal base material to form irregular concave parts and irregular hilly convex parts, the surface of the metal base material can be more conveniently processed into an anisotropic compact concave-convex structure, and the hydrophobicity and the combination property with PVD are better.

With reference to the first aspect, in a further aspect, the concave portion is a spherical pit, and the spherical diameter of the pit is 0.3-0.95 mm; the hole center distance of the pit ranges from 0.3 mm to 0.8 mm.

Through adopting above-mentioned technical scheme, the concave part is spherical pit, is equipped with hilly form arch between the pit and can form multistage concave-convex structure on the metal surface, can form better non-sticking performance. The Physical Vapor Deposition (PVD) processing technology is applied to concave-convex structures of pits with the spherical diameters of 0.3-0.95 mm, preferably 0.4-0.65 mm, and the pit hole center distances of 0.3-0.8 mm, preferably 0.6 mm, and has better non-stick performance and wear resistance.

With reference to the first aspect, in a further aspect, at least part of the concave portion and/or at least part of the convex portion has a plurality of spherical pits, hilly protrusions are arranged between the pits, and the spherical diameter of the pits is 0.3-0.95 mm; the hole center distance of the pit ranges from 0.3 mm to 0.8 mm.

Through adopting above-mentioned technical scheme, be equipped with a plurality of sphere pits in the concave part, be equipped with hilly form arch between the pit and can form multistage concave-convex structure on the metal surface, can form better nonstick performance. Physical Vapor Deposition (PVD) is applied to concave-convex structures with pit spherical diameters of 0.3-0.95 mm, preferably 0.4-0.65 mm, pit hole center distances of 0.3-0.8 mm, preferably 0.6 mm, and has better non-stick performance and wear resistance.

With reference to the first aspect, in a further aspect, the sphere diameter of the pit is 0.4-0.65 mm; the hole center distance of the pit is 0.6 millimeter.

By adopting the technical scheme, the physical non-stick structure has better combination property and non-stick property.

In a second aspect, the present application provides a cooking appliance comprising a body formed from a metal substrate, the inner surface of the body being provided with the physical non-stick structure of the first aspect.

Through adopting above-mentioned technical scheme, have the cooking utensil of physical non-stick structure, can improve non-stick performance when cooking food, reduce food adhesion and at body surface probability, be convenient for more wash cooking utensil, promoted the culinary art enjoyment.

With reference to the second aspect, in a further aspect, the concave portion and the convex portion are concave-convex structures with a height difference of 45-85 micrometers formed by processing the inner surface of the body after the body is molded.

By adopting the technical scheme, the physical vapor deposition layer has the characteristic of wear resistance, has the shape similar to the concave-convex structure, and has the hydrophobicity similar to the concave-convex structure on the surface of the physical vapor deposition layer. Therefore, the physical non-stick structure processed on the surface of the metal substrate enables the metal surface to have the characteristics of wear resistance and non-stick, the non-stick performance can be improved when food is cooked, the probability that the food is stuck on the surface of the body is reduced, the cooking utensil is more convenient to clean, and the cooking fun is improved.

In summary, the application has at least one of the following beneficial technical effects:

1. The application has physical non-stick structure, so that the metal surface has the characteristics of wear resistance and physical non-stick.

2. The physical non-stick structure can reduce the falling risk brought by a two-body structure and has higher strength.

3. The physical non-stick structure of the application has the advantages that the physical vapor deposition layer is directly contacted with the concave-convex structure, and the middle part is not provided with the transition layer, so that the bonding strength can be ensured, the processing procedures can be reduced, and the processing cost can be reduced.

4. The cooking utensil can meet the wear resistance and non-stick performance of the cooking utensil during normal cooking, and can improve the cost performance of the cooking utensil.

Drawings

FIG. 1 is a schematic structural view of a metal substrate having a first embodiment of the physical non-stick structure of the present application;

FIG. 2 is an enlarged schematic view of FIG. 4 at A;

FIG. 3 is a schematic view of a portion of section B-B of FIG. 5;

FIG. 4 is a schematic view of the relief structure of FIG. 6 after removing the PVD layer;

FIG. 5 is a schematic cross-sectional view of a second embodiment of a physical non-stick structure of the present application;

FIG. 6 is an enlarged schematic view of FIG. 8 at C;

FIG. 7 is a schematic view of a relief structure of a third embodiment of a physical vapor deposition layer removed;

FIG. 8 is an enlarged schematic view of FIG. 10 at D;

fig. 9 is a schematic structural view of a first embodiment of the cooking appliance of the present application;

fig. 10 is a schematic structural view of a second embodiment of the cooking appliance of the present application.

Reference numerals:

100. A metal substrate; 200. a physical non-stick structure; 2. a concave-convex structure; 21. a concave portion; 22. a convex portion; 3. a physical vapor deposition layer; 4. pit; 41. a protrusion; 5. a pot body; 51. an inner surface; 511. a bottom region; 52. an outer surface; 521. a pot opening area; 6. a handle; a. hole center distance; b. a concave-convex height difference; c. recess depth.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the present application will be described in further detail with reference to the accompanying drawings. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

In the description of the present application, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.

Existing chemical non-stick structures include grooves and lands. The color of the groove in the non-stick structure in the prior art is darker to represent large roughness, the color of the convex surface outside the groove is brighter to represent small roughness, and the groove is formed by processing a certain depth on the surface of the metal substrate by a chemical corrosion method. The chemical non-stick product in the prior art is prepared by spraying a layer of polytetrafluoroethylene on the surface of the concave-convex structure, and the non-stick performance of the product is realized through the polytetrafluoroethylene. And finally, removing polytetrafluoroethylene on the surface of the convex surface in a polishing mode, and polishing the convex surface into a surface with a certain finish degree so as to reduce the adhesiveness of the convex surface which is not covered by polytetrafluoroethylene, so that the roughness of the concave part is larger than that of the convex part. The polytetrafluoroethylene in the groove with the structure has low possibility of being shoveled off by the turner, but the polytetrafluoroethylene still has the falling risk under the conditions of collision and the like, and the polytetrafluoroethylene is decomposed at high temperature, so that potential safety hazards exist.

In order to solve the defect, through long-term research and multiple experimental tests by the inventor, the bottleneck of the prior art is broken through, and the physical non-stick structure 200 is developed, has non-stick property and wear resistance, does not decompose like polytetrafluoroethylene at high temperature, and has no potential safety hazard of chemical coating.

Some embodiments of the present application are described in detail below with reference to the accompanying drawings. Features of the embodiments described below may be combined with each other without conflict.

The cooking appliance in the application comprises a catering appliance and a cooking appliance.

Example 1

Referring to fig. 1-4, a first embodiment of a physical non-stick structure 200 is schematically illustrated. The physical non-adhesive structure 200 is disposed on at least a portion of the surface of the metal substrate 100, the surface of the metal substrate 100 is provided with a concave-convex structure 2 including a plurality of concave portions 21 and convex portions 22, and the convex portions 22 are in a hilly shape surrounding the concave portions 21. The surface roughness of the concave part 21 is smaller than that of the convex part 22, at least part of the concave part 21 or at least part of the convex part 22 or at least part of the concave-convex structure 2 is provided with a physical vapor deposition layer 3, and the appearance of the surface of the physical vapor deposition layer 3 is similar to that of the surfaces of the concave part 21 and the convex part 22 covered by the physical vapor deposition layer. Through experimental tests, the physical non-stick structure 200 can achieve an ideal technical effect when applied to the metal substrate 100 with the Vickers hardness of more than or equal to 100.

Referring to fig. 1, the physical non-stick structure 200 in the present embodiment includes integrally processing the concave-convex structure 2 on a predetermined area of the surface of the metal substrate 100 by a processing method such as high-speed impact of steel shot on the surface of the metal substrate 100 or rolling, and then performing PVD coating, so that the concave-convex structure 2 is made of the same material as the metal substrate 100.

Referring to fig. 2, the physical non-stick structure 200 includes a concave-convex structure 2 on the surface of the metal substrate 100, the concave-convex structure 2 includes concave portions 21, and the concave portions 21 may be uniformly distributed on the surface of the metal substrate 100 or may be irregularly distributed on the surface of the metal substrate 100. In the scheme that the concave parts 21 are irregularly distributed on the surface of the metal base material 100, the concave-convex structure 2 is formed by impacting steel shots with the diameter of 0.3-1.9 mm on the surface of the metal base material 100 by adopting high-pressure air.

The concave portion 21 in this embodiment is a spherical concave portion 4, the roughness of the surface of the concave portion 4 is less than or equal to 3.2 μm, the diameter of the concave portion 4 is 0.3-0.95 mm, most preferably 0.4-0.65 mm, the concave portion 4 is a spherical concave portion 4 formed by spraying a steel shot of 0.6-1 mm to the surface of the metal base material 100 at a pressure of 2Mpa-8Mpa, and the diameter of the concave portion 4 is a spherical diameter. The hole center distance a of the pit 4 ranges from 0.3 to 0.8 mm, and is most preferably 0.6 mm, and the hole center distance a refers to the center distance of the pit 4. In some embodiments, the cross section of the die is round, oval or polygonal, such as hexagon or quadrilateral, according to design requirements by rolling, stamping and other processing modes. If the pit 4 adopts a polygon, the polygon can be uniformly distributed by rolling or can be irregularly arranged according to the requirement, and the diameter of an inscribed circle of the polygon is 0.3-0.95 mm, and is optimally 0.4-0.65 mm.

Referring to fig. 3 and 4, the concave-convex structure 2 is formed by connecting a concave pit 4 machined on the surface of the metal substrate 100 and a hilly convex portion 22 formed by extrusion between the concave pit 4, and the distance from the highest point of the convex portion 22 to the lowest point of the concave portion 21 is 45-85 micrometers, and is optimally 55-75 micrometers. The concave-convex structure 2 and the metal base material 100 are integrated, and the physical vapor deposition layer 3 is in direct contact with the surface of the concave-convex structure 2.

According to the design requirements of different products, at least part of the surface of the concave-convex structure 2 is provided with a physical vapor deposition layer 3, and the surface appearance of the physical vapor deposition layer 3 is similar to the surface appearance of the concave-convex structure 2 covered by the physical vapor deposition layer through setting and controlling the PVD coating process parameters, so that the non-sticking effect of the surface of the metal substrate 100 is achieved. The physical vapor deposition layer 3 is in direct contact with the concave-convex structure 2, and the thickness of the physical vapor deposition layer 3 is 0.8-1.45 micrometers, so that a better technical effect can be achieved.

The bonding property of the PVD coating in direct contact with the metal substrate 100 is poor, and good wear resistance cannot be ensured, and a transition layer needs to be provided between the PVD coating and the metal substrate 100 to improve the bonding property, for example, the patent application nos. CN202121169683.5 and CN202222426611.5 all adopt a scheme of adding a transition layer between the metal substrate 100 and the physical vapor deposition layer 3 to bond the metal substrate 100 and the physical vapor deposition layer 3. The transition layer has good binding force to the coating and good binding force to the metal substrate 100, so that the PVD coating and the metal substrate 100 are guaranteed to have good binding force and are not easy to fall off. Through theoretical analysis and long-term experimental tests, the physical non-stick structure 200 of the application researches a new structure, and the corresponding concave-convex structure 2 is directly processed on the surface of the metal substrate 100, so that good bonding force between the PVD coating and the metal substrate 100 can be realized, the non-stick property of the surface of the metal substrate 100 can be improved, the wear-resistant performance can be realized, and the wear-resistant non-stick property of the surface of the metal substrate 100 can be maintained for a long time. The metal base material 100 is a metal material such as carbon steel, alloy steel, stainless steel, or titanium alloy.

Comparison test of different parameter performances:

The spherical diameter of the pit has correlation with the concave-convex height difference b, and the concave-convex height difference b parameter is selected for comparison analysis in the test from the aspects of test accuracy and convenience. As can be seen from performance comparison tests, the physical vapor deposition thickness of items 5-8 is in the range of 0.8-1.45um, the comprehensive performance of the physical vapor deposition thickness is optimal when the height difference b of the concave-convex is 45-85um, and the cost of the parameter range is also most reasonable.

When the deposition thickness of the physical vapor phase is less than 0.8um and the concave-convex height difference b is less than 45um, the binding force of the plating layer is poor and can only reach the level of 3, and the plating layer is easy to fall off; hardness ranges from 600 to 800HV, hardness is insufficient, and wear resistance is poor; the omelette has a class III nonstick effect and a poor nonstick effect.

When the deposition thickness of the physical vapor phase is less than 0.8um and the concave-convex height difference b is more than 85um, the hardness of the plating layer is 300-800HV, the hardness is insufficient and the wear resistance is poor; the omelette has a class III nonstick effect and a poor nonstick effect.

When the deposition thickness of the physical vapor phase is more than 1.45um and the concave-convex height difference b is less than 45um, the binding force of the plating layer is very poor and can only reach the level of 3, and the plating layer is easy to fall off; the hardness range of 1500-2000HV can meet the requirements, but raw materials are wasted, the cost is increased, the fried eggs are not sticky, the effect is class III, and the non-sticky effect is poor.

When the deposition thickness of the physical vapor is larger than 1.45um and the height difference b of the concave-convex is larger than 85um, the binding force can reach more than 2 levels, the hardness range is 1500-2000HV can reach the requirement, but raw materials are wasted, the cost is increased, the fried egg is not sticky, the effect is III levels, and the non-sticky effect is poor.

When the deposition thickness of the physical vapor is within the range of 0.8-1.45um and the height difference b of the concave-convex is 45-85um, the binding force can reach the level of 2, the hardness is 1500-2000HV, the non-sticking effect of the fried egg is level II, and the cost performance is highest.

Example two

Referring to fig. 5 and 6, a difference from the embodiment is that the metal substrate 100 is processed with a plurality of concave portions 21 and convex portions 22 formed between the concave portions 21, the concave portions 21 may be formed by etching, impact, rolling or stamping, and the concave portion depth c is between 0.1 mm and 0.9 mm. A plurality of pits 4 are machined on the surfaces of the concave part 21 and the convex part 22, hilly bulges 41 are arranged between the pits 4, and the spherical diameter of the pits 4 is 0.3-0.95 mm, preferably 0.4-0.65 mm. The hole center distance a of the pit 4 is in the range of 0.3-0.8 mm, preferably 0.6 mm. The concave part 21 can be designed to have the surface roughness less than or equal to 3.2 microns according to different product requirements, and the concave part 4 is a spherical concave part 4 formed by spraying steel shots with 0.6-1 mm to the surface of the metal substrate 100 under the pressure of 2Mpa-8 Mpa. The distance from the highest point of the protrusion 41 to the lowest point of the pit 4 in the embodiment of the concave-convex height difference b is 45-85 micrometers, and is most preferably 55-75 micrometers; the hole center distance a of the pit 4 ranges from 0.3 to 0.8 mm, and is most preferably 0.6 mm, and the hole center distance a refers to the center distance of the pit 4. The present embodiment can produce a multi-stage concave-convex structure on the surface of the metal substrate 100, and the bonding with PVD and the product surface wear resistance can be improved.

In some embodiments, the cross section of the die is round, oval or polygonal, such as hexagon or quadrilateral, according to design requirements by rolling, stamping and other processing modes. If the pit 4 adopts a polygon, the polygon can be uniformly distributed by rolling or can be irregularly arranged according to the requirement, and the diameter of an inscribed circle of the polygon is 0.3-0.95 mm, and is optimally 0.4-0.65 mm.

Example III

Referring to fig. 7 and 8, a difference from the embodiment is that an electrolytic layer or a plasma polishing layer is further disposed between the concave-convex structure 2 and the physical vapor deposition layer 3.

Referring to fig. 7, the concave-convex structure 2 formed by the concave portion 21 and the convex portion 22 on the surface of the metal substrate 100 is the same as that of the first embodiment, and will not be described again.

Referring to fig. 8, the electrolytic layer or the plasma polishing layer is formed by electrolytic or plasma polishing to form an irregular rough surface of nanometer or micrometer scale on the surfaces of the concave portion 21 and the convex portion 22, and the processing in this embodiment is electrolytic processing.

In some embodiments, there are various combination processing modes, for example, an electrolytic layer or a plasma polishing layer is disposed on the surface of a part of the concave-convex structure 2, a part of the electrolytic layer/plasma polishing layer, or a part of the concave-convex structure 2 and a part of the electrolytic layer/plasma polishing layer are coated with a physical vapor deposition layer 3, so as to form various combination structures on the surface of the metal substrate 100, and different surface effects are achieved according to different use requirements, or different surface effects are achieved in different areas on the surface of the metal substrate 100.

Example IV

Referring to fig. 9, the present embodiment discloses a cooking apparatus, specifically a wok, which includes a wok body 5 and a handle 6, wherein a bottom area 511 of an inner surface 51 of the wok body 5 is provided with a physical non-stick structure 200 in the first embodiment. In practical applications, in order to achieve better non-stick performance, the inner surface 51 of the pan body 5 may be provided with a physical non-stick structure 200. In the embodiment, the frying pan is merely illustrated, and in practical application, the physical non-stick structure 200 can be applied to all surfaces of cooking appliances, including tableware and cooking appliances, including containers (soybean milk machine cup, electric cooker, pressure cooker, electric chafing dish liner or oven box, etc.), juice extractor cup, scoop, etc. which are not limited to cooking appliances.

Example five

Referring to fig. 10, the difference between the present embodiment and the fourth embodiment is that the outer surface 52 of the pan body 5 of the present embodiment is also provided with a physical non-stick structure 200, and the physical non-stick structure 200 is disposed at a position far away from the pan bottom, and in practical application, if cost is not considered, in order to achieve good non-stick performance of the outer surface 52, the physical non-stick structure 200 may be disposed in all areas of the outer surface 52. Or the concave-convex structure 2 and the convex 22 are integrally arranged on the outer surface 52 of the pot body 5 far away from the pot opening area 521 of the bottom.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the embodiments and descriptions described herein are merely illustrative of the principles of the present utility model, and various changes, modifications, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model, which are to be defined by the appended claims.

Claims (10)

1. The utility model provides a physical non-stick structure (200), is applied to metal substrate (100) surface, its characterized in that, metal substrate (100) surface is equipped with concave-convex structure (2) that contains a plurality of concave parts (21) and convex part (22), convex part (22) are around in the hilly topography around concave part (21), concave part (21) surface roughness is less than convex part (22) surface roughness, at least part concave part (21) and/or part convex part (22) surface is provided with physical vapor deposition layer (3).

2. The physical non-stick structure (200) according to claim 1, wherein the recess (21) and the protrusion (22) are of unitary construction with the metal substrate (100), the physical vapor deposition layer (3) being in direct contact with at least part of the recess (21) and/or part of the protrusion (22) surface.

3. The physical non-stick structure (200) according to claim 1, characterized in that at least part of the surface of the recesses (21) and/or at least part of the protrusions (22) is provided with an electrolyte layer, which is in direct contact with the physical vapour deposition layer (3).

4. The physical non-stick structure (200) according to claim 1, characterized in that at least part of the surface of the recesses (21) and/or part of the protrusions (22) is provided with a plasma polishing layer, which is in direct contact with the physical vapor deposition layer (3).

5. The physically non-stick structure (200) according to claim 1, wherein the vickers hardness of the metal substrate (100) is 100 or more, and the recesses (21) are irregularly distributed on the surface of the metal substrate (100).

6. The physical non-stick structure (200) according to claim 1, wherein the recess (21) is a spherical pit (4), the spherical diameter of the pit (4) being 0.3-0.95 mm; the hole center distance (a) of the pit (4) is in the range of 0.3-0.8 mm.

7. The physical non-stick structure (200) according to claim 1, wherein at least part of the recesses (21) and/or at least part of the protrusions (22) have a plurality of spherical pits (4), hilly protrusions (41) are arranged between the pits (4), and the spherical diameter of the pits (4) is 0.3-0.95 mm; the hole center distance (a) of the pit (4) is in the range of 0.3-0.8 mm.

8. The physically non-stick structure (200) according to claim 6 or 7, wherein the spherical diameter of the pits (4) is 0.4-0.65 mm; the hole center distance (a) of the pit (4) is 0.6 mm.

9. Cooking appliance comprising a body formed by a metal substrate (100), characterized in that the inner surface (51) of the body is provided with a physical non-stick structure (200) according to any one of claims 1-8.

10. Cooking appliance according to claim 9, characterized in that the recesses (21) and the protrusions (22) are relief structures (2) with a height difference of 45-85 micrometers produced by processing the inner surface (51) of the body after the body has been formed.