Frying pan and frying and baking appliance

Abstract

The frying pan comprises a pan body, the pan body is provided with an inner surface, the inner surface comprises a bottom surface, a plurality of convex ribs are arranged on the bottom surface, the bottom surface comprises a concave-convex structure containing a plurality of pits and protrusions, the concave-convex structure at least covers the surfaces of the convex ribs, and the convex ribs are arranged on the surface of the pan body. The roughness of the pits is smaller than that of the protrusions, and physical vapor deposition layers are arranged on the surfaces of at least part of the pits and / or part of the protrusions. The frying pan and the frying and baking appliance have good non-stick performance.

Description

Technical Field

[0001] The present application relates to the technical field of grilling appliances, and particularly relates to a frying pan and a grilling appliance. Background Art

[0002] As grilled food is increasingly favored by people, frying pans have gradually entered the kitchen in recent years. They are small in size and convenient to operate, mainly used for cooking food, and are deeply loved by people. Grilling is a cooking method for food ingredients. During the process of grilling food, people use a frying pan to cook flat or sheet-shaped foods such as lamb kebabs, vegetables, steaks, and fried fish. When grilling, the food contains less oil and fat, and the grilled food has a fragrant and crispy taste, which is deeply liked by people.

[0003] Currently, there are open-fire frying pans and electric frying pans. In the field of household kitchen appliances, electric griddles, meat roasters and other household electric frying pans heat the frying pan by means of electric heating. Whether it is an open-fire frying pan or an electric frying pan, there is a problem of adhesion between the food ingredients and the frying pan during the grilling process.

[0004] The existing frying pans achieve non-stick performance by coating a chemical coating on the surface of the frying pan, generally polytetrafluoroethylene. The polytetrafluoroethylene coating is non-toxic under normal conditions, but it will start to volatilize when the heating temperature of the coating reaches 260°C, and the polytetrafluoroethylene coating will start to decompose when the temperature reaches 350°C. Therefore, the operating temperature of non-stick pans with a polytetrafluoroethylene coating generally cannot exceed 250°C. However, the heating temperature during general grilling cooking often exceeds 260°C, so there are safety hazards. In addition, the coating is not wear-resistant and there is a risk of peeling off, and it is easy to be accidentally ingested with food, which affects physical health. Utility Model Content

[0005] In order to solve the above technical problems, the present application provides a frying pan and a grilling appliance, which can not only improve the non-stick performance of the surface of the pan body, but also have the advantages of wear resistance and not easy to fall off.

[0006] In a first aspect, the present application provides a frying pan, including a pan body. The pan body has an inner surface, and the inner surface includes a bottom surface. The bottom surface is provided with a plurality of convex ribs. The bottom surface includes an uneven structure including a plurality of pits and protrusions. The uneven structure at least covers the surface of the convex ribs. The roughness of the surface of the pits is less than the roughness of the surface of the protrusions. At least part of the pits and / or part of the surface of the protrusions are provided with a physical vapor deposition layer.

[0007] By adopting the above technical solution, during the grilling of food ingredients, the convex ribs are used to support the food ingredients, and the uneven structure can form a hydrophobic structure on the surface of the convex ribs, but this hydrophobic structure is not wear-resistant. A physical vapor deposition layer is plated on the surface of the uneven structure. The physical vapor deposition layer has the characteristic of wear resistance, so that the wear-resistant non-stick performance of the convex rib surface of the pan body can be realized.

[0008] The traditional non-stick structure is processed by chemical etching method to produce grooves on the metal surface and then sprayed with chemical coatings to achieve oil-locking and non-stick performance. However, the chemical coating is not wear-resistant. After being scratched by tableware such as spatulas, the chemical coating is prone to peeling off, which affects safety. Moreover, the roughness of the grooves processed by the chemical etching method is higher than that of the protrusions around the grooves. This structure has a lower surface strength and a poor bonding property with the physical vapor deposition layer (PVD), and a transition layer needs to be added between the chemical coating and the deposition layer to improve the bonding performance.

[0009] The disk body of this technical solution has an inner surface, and the inner surface has an uneven structure, which can make the bottom of the disk body have non-stick performance, and the surface roughness of the pits is less than that of the protrusions. It can not only improve the non-stick performance between the inner surface of the disk body and cooking ingredients, but also improve the bonding performance with PVD. This technical solution can be used for high-temperature cooking such as frying, grilling and roasting, reducing the adhesion between the ingredients and the disk body, facilitating the cleaning of the disk body and reducing the waste of ingredients.

[0010] Combined with the first aspect, in a further solution, the protrusions are in a hilly shape surrounding the pits, and the physical vapor deposition layer is in direct contact with at least part of the surfaces of the pits and / or part of the protrusions.

[0011] By adopting the above technical solution, the uneven structure can be directly processed on the inner surface of the disk body by shot peening or rolling, etc. The integral structure has higher strength, and the risk of peeling caused by the two-body structure can be reduced. The surface roughness of the pits is less than that of the protrusions, and the protrusions are in a hilly shape surrounding the pits, which can improve the bonding performance with the physical vapor deposition layer and has good surface strength. The physical vapor deposition layer is in direct contact with the uneven structure, and there is no transition layer in the middle, which can reduce the processing procedures, lower the processing cost, has good bonding performance and can also achieve wear-resistant and non-stick performance.

[0012] Combined with the first aspect, in a further solution, the bottom surface further includes concave parts and convex parts between the concave parts, and at least part of the surfaces of the concave parts and / or at least part of the convex parts have an uneven structure, and the protrusions between the pits are in a hilly shape.

[0013] By adopting the above technical solution, multiple spherical pits are provided on the surfaces of the concave parts and the convex parts, and hilly protrusions are provided between the pits, which can form a multi-level uneven structure on the metal surface and can form better non-stick performance. The surface roughness of the pits is less than that of the protrusions, which can improve the bonding performance with the physical vapor deposition layer and has good surface strength.

[0014] Combined with the first aspect, in a further solution, the uneven structure and the disk body base material are an integral structure, and the physical vapor deposition layer is in direct contact with at least part of the surfaces of the pits and / or part of the protrusions.

[0015] By adopting the above technical solution, an uneven structure with multiple concave portions and convex portions is directly processed on the surface of the disk substrate by means of impact or rolling, etc. The integral structure has higher strength, and the risk of detachment caused by the two-piece structure can be reduced. The physical vapor deposition layer is in direct contact with the uneven structure without an intermediate transition layer, which can reduce the processing procedures, lower the processing cost, have good bonding properties, and can also achieve wear-resistant and non-sticking properties.

[0016] Combined with the first aspect, in a further embodiment, at least part of the pits and / or at least part of the surfaces of the protrusions are provided with an electrolytic layer or a plasma polishing layer, and the electrolytic layer or the plasma polishing layer is in direct contact with the physical vapor deposition layer.

[0017] Through experimental tests, it is found that under the action of electrolysis, micron-level, nano-level V-shaped, C-shaped, U-shaped or randomly sized concave bodies can be formed on the inner surface of the cookware, which can further reduce the contact area between the food ingredients and the cookware. Coupled with the repulsive force formed by the expansion of the air in the concave bodies due to heat, the non-sticking effect can be well achieved. In addition, electrolysis can also form an oxide film on the surface of the shot-peening layer, thereby changing its color and improving its performance, enhancing the performance and grade of the product. Plasma polishing can further process micron-level or nano-level uneven structures on the surface of the shot-peening layer, further enhancing the hydrophobic property and the non-sticking property of the product surface. Plasma polishing can also improve the brightness of the product surface and enhance the quality of the product.

[0018] Combined with the first aspect, in a further embodiment, the surface of the pit is spherical, and the spherical diameter of the pit is 0.2 - 0.95 mm; the range of the center-to-center distance of the pits is 0.3 - 0.8 mm.

[0019] Combined with the first aspect, in a further embodiment, the bottom surface further includes convex portions between the concave portions, and at least part of the surfaces of the concave portions and / or at least part of the convex portions have an uneven structure. The protrusions between the pits are in the shape of hills, the surface of the pits is spherical, and the spherical diameter of the pits is 0.2 - 0.95 mm; the range of the center-to-center distance of the pits is 0.3 - 0.8 mm.

[0020] By adopting the above technical solution, the physical vapor deposition (PVD) processing technology has better non-sticking performance and wear-resistant performance when applied to the uneven structure with a spherical diameter of the pits of 0.2 - 0.95 mm and a range of the center-to-center distance of the pits of 0.3 - 0.8 mm.

[0021] Combined with the first aspect, in a further embodiment, the spherical diameter of the pit is 0.4 - 0.65 mm; the center-to-center distance of the pits is 0.6 mm.

[0022] By adopting the above technical solution, the physical vapor deposition (PVD) processing technology is applied to the concave-convex structure of the pits with a spherical diameter of 0.2-0.95 mm, preferably 0.4-0.65 mm, and a pit center distance range of 0.3-0.8 mm, preferably 0.6 mm, which has better non-stick performance and wear resistance.

[0023] In a second aspect, the present application provides a frying and grilling utensil, comprising the frying pan described in the first aspect.

[0024] By adopting the above technical solution, the frying and grilling utensil with a frying pan can improve the non-stick performance when cooking food, reduce the probability of food sticking to the inner surface of the frying pan, make it easier to clean the frying and grilling utensil, and enhance the cooking pleasure.

[0025] In combination with the second aspect, in a further solution, it also includes a heating element, and the heating element is located on a side of the tray body away from the bottom surface.

[0026] By adopting the above technical solution, the heating element is located on the side of the bottom surface of the dish body away from the concavo-convex structure, which can make the heating efficiency of the ribs higher and improve the frying and grilling of food that is in direct contact with the ribs. Because the rib surface is provided with a concavo-convex structure, the high-temperature rib surface can achieve good non-stick performance and reduce the adhesion of food to the rib surface.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] 1. The frying pan of the present application makes the metal surface both wear-resistant and physically non-stick, and is particularly suitable for frying, roasting, deep-frying and has good non-stick properties.

[0029] 2. The frying pan of the present application can reduce the risk of falling off caused by the two-body structure and has higher strength.

[0030] 3. In the frying pan of the present application, the physical vapor deposition layer is in direct contact with the concave-convex structure without a transition layer in between, which can ensure the bonding strength and reduce the processing procedures and the processing cost.

[0031] 4. The grilling utensil of the present application has a grilling pan, which can meet the wear resistance and non-stick properties of the grilling utensil during normal cooking, and can improve the cooking efficiency of the grilling utensil while reducing the adhesion of food to the grilling pan. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the first embodiment of the frying pan of the present application;

[0033] Figure 2 yes Figure 1 Enlarged schematic diagram of area A in the middle;

[0034] Figure 3 is Figure 2 Schematic diagram of the partial B-B cross-section in

[0035] Figure 4 is Figure 3 Schematic diagram of the concave-convex structure after removing the physical vapor deposition layer;

[0036] Figure 5 Schematic diagram of the structure of the second embodiment of the frying pan in this application;

[0037] Figure 6 is Figure 5 Enlarged schematic diagram of area C in

[0038] Figure 7 is Figure 6 Schematic diagram of the partial D-D cross-section in

[0039] Figure 8 is Figure 7 Enlarged schematic diagram of area E in

[0040] Figure 9 Schematic diagram of the concave-convex structure of the second embodiment of the frying pan in this application after removing the physical vapor deposition layer;

[0041] Figure 10 is Figure 9 Enlarged schematic diagram of area F in

[0042] Figure 11 Schematic diagram of the structure of the first embodiment of the frying and roasting appliance in this application;

[0043] Figure 12 Schematic diagram of the structure of the second embodiment of the frying and roasting appliance in this application.

[0044] Reference numerals:

[0045] 1. Pan body; 11. Inner surface; 111. Bottom surface; 12. Convex rib; 13. Concave-convex structure; 131. Pit; 132. Protrusion; 14. Physical vapor deposition layer; 15. Recess; 16. Protrusion; 2. Body; a. Hole center distance; b. Concave-convex height difference; c. Recess depth. Detailed implementation manners

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will further elaborate on this application with reference to the accompanying drawings. The components of the embodiments of this application described and illustrated in the drawings here can generally be arranged and designed in various different configurations. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

[0047] It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it will not be necessary to further define and explain it in subsequent figures.

[0048] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0049] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

[0050] The non-stick process on the surface of the existing frying pan is to coat a chemical coating on the surface of the frying pan. In the prior art, a layer of polytetrafluoroethylene is sprayed, and the non-stick performance of the frying pan is achieved through polytetrafluoroethylene. However, when the heating temperature of the coating reaches 260°C, it will start to volatilize, and when the temperature reaches 350°C, the polytetrafluoroethylene coating will start to decompose. Therefore, the operating temperature of the non-stick pan with a polytetrafluoroethylene coating generally cannot exceed 250°C. However, for general cooking utensils such as frying pans and baking pans, the heating temperature often exceeds 260°C, so there are safety hazards. In addition, the coating is not wear-resistant, there is a risk of peeling off, and it is easy to be accidentally eaten with food, which affects physical health.

[0051] To solve this defect, through the long-term research and multiple experimental tests of the inventor, the bottleneck of the prior art has finally been broken through, and a non-stick structure of a frying pan has been developed. This structure has non-stick properties and wear resistance and will not decompose like polytetrafluoroethylene at high temperatures, and has good non-stick performance during frying, roasting, and frying.

[0052] The following will describe in detail some embodiments of the present application with reference to the drawings. The features in the following embodiments can be combined with each other without conflict.

[0053] The frying and roasting utensils in the present application include catering utensils and cooking utensils.

[0054] Embodiment 1

[0055] Please refer to Figure 1, this embodiment discloses a frying pan. The frying pan has an inner surface 11. At the bottom of the inner surface 11 of the pan body 1, there is a bottom surface 111. The bottom surface 111 is provided with a plurality of strip-shaped ribs 12. The ribs 12 are arranged at intervals, and the ribs 12 protrude from the bottom surface 111 by about 1 - 5 millimeters.

[0056] Please refer to Figure 1 and Figure 2 , the bottom surface 111 of the frying pan includes an uneven structure 13 containing a plurality of pits 131 and protrusions 132. The uneven structure 13 of the frying pan covers at least the surface of the ribs 12 of the frying pan. The surface roughness of the pits 131 on the frying pan is less than the surface roughness of the protrusions 132. The recess 15 is a spherical pit 131. The surface roughness of the pit 131 is ≤ 3.2 micrometers. The diameter of the pit 131 is 0.2 - 0.95 millimeters, preferably 0.4 - 0.65 millimeters. The pit 131 is a spherical pit 131 formed by spraying steel balls with a diameter of 0.3 - 1.9 millimeters onto the inner surface 11 of the pan body 1 under a pressure of 2 Mpa - 8 Mpa. The diameter of the pit 131 mentioned above is the spherical diameter. The steel balls can be reciprocally sprayed along the length direction of the rib 12 onto the inner surface 11 of the pan body 1, or can be reciprocally sprayed along the width direction of the rib 12 onto the inner surface 11 of the pan body 1. No matter which method is used, the finally processed pit 131 is as perpendicular to the inner surface 11 as possible. The center - to - center distance a of the pits 131 ranges from 0.3 - 0.8 millimeters, preferably 0.6 millimeters. The range of the center - to - center distance a mentioned here refers to the distance between the centers of the spherical pits 131. In some embodiments, it is also possible to process pits with a circular, elliptical or polygonal cross - section according to design requirements through processing methods such as rolling and stamping. For example, the polygon can be a hexagon or a quadrilateral. If the pit 131 is polygonal, the polygons can be evenly distributed by rolling or can be designed to be irregularly arranged and then stretched into shape according to needs. The diameter of the inscribed circle of the polygon is 0.2 - 0.95 millimeters, preferably 0.4 - 0.65 millimeters.

[0057] Please refer to Figure 3 , the protrusion 132 is a hilly - shaped morphology surrounding the pit 131. The surface roughness of the pit 131 is less than the surface roughness of the protrusion 132. The pits 131 and the protrusions 132 are an integral structure with the substrate of the pan body 1. At least part of the surface of the pits 131 and / or part of the protrusions 132 is provided with a physical vapor deposition layer 14. The physical vapor deposition layer 14 is in direct contact with at least part of the surface of the pits 131 and / or part of the protrusions 132. The surface morphology of the physical vapor deposition layer 14 is similar to the surface morphology of the pits 131 and protrusions 132 it covers.

[0058] Please refer to Figure 4, the frying pan in this embodiment is formed by subjecting a region set on the inner surface 11 of the pan body 1 to high-speed impact of steel shots on the inner surface 11 of the pan body 1 to integrally process the concave-convex structure 13 and then performing PVD coating. Therefore, the material of the pits 131 and the protrusions 132 is the same as that of the substrate of the pan body 1.

[0059] Please refer to Figure 3 and Figure 4 , the concave-convex structure 13 is a surface formed by connecting the pits 131 processed on the inner surface 11 of the pan body 1 and the hilly protrusions 132 formed by extrusion between the pits 131. The concave-convex height difference b, that is, the distance from the highest point of the protrusion 132 to the lowest point of the pit 131, is 45 - 85 microns, and preferably 55 - 75 microns. The concave-convex structure 13 and the substrate of the pan body 1 are an integral structure, and the physical vapor deposition layer 14 is in direct contact with the surface of the concave-convex structure 13.

[0060] According to the design requirements of different products, at least part of the surface of the concave-convex structure 13 is provided with a physical vapor deposition layer 14. By setting and controlling the PVD coating process parameters, the surface morphology of the physical vapor deposition layer 14 is made similar to the surface morphology of the concave-convex structure 13 it covers, so as to achieve the non-stick effect of the inner surface 11 of the pan body 1. The physical vapor deposition layer 14 is in direct contact with the concave-convex structure 13, and a thickness of the physical vapor deposition layer 14 of 0.8 - 1.45 microns can achieve better technical effects.

[0061] The bonding property of the PVD coating in direct contact with the metal substrate is poor, and good wear resistance cannot be guaranteed. A transition layer needs to be provided between the PVD coating and the metal substrate to improve the bonding performance. For example, the patents with application numbers CN202121169683.5 and CN202222426611.5 both adopt the scheme of adding a transition layer between the metal substrate and the physical vapor deposition layer 14 to realize the bonding of the metal substrate and the physical vapor deposition layer 14. The transition layer can have good bonding force with both the coating and the metal substrate to ensure good bonding force between the PVD coating and the metal substrate and is not easy to fall off. Through theoretical analysis and long-term experimental tests of the frying pan of this application, a new structure has been developed. The corresponding concave-convex structure 13 is directly processed on the surface of the pan body 1 made of metal material, which can not only achieve good bonding force between the PVD coating and the substrate of the pan body 1, but also improve the non-stick property of the surface of the pan body 1, and also has wear-resistant performance, and can maintain the wear-resistant non-stick performance of the surface of the pan body 1 for a long time. The substrate of this pan body 1 is metal materials such as carbon steel, alloy steel, stainless steel and titanium alloy.

[0062] Through testing, when the thickness of the physical vapor deposition layer 14 is in the range of 0.8 - 1.45 um and the concave-convex height difference b is 45 - 85 um, the bonding force can reach level 2, the hardness range is 1500 - 2000 HV, the non-stick effect of frying eggs is grade II, and the cost performance is the highest.

[0063] Example 2

[0064] Please refer to Figures 5 - 8 , which is different from Example 1 in that multiple concave portions 15 are machined on the inner surface 11 of the disk body 1, and convex portions 16 are formed between the concave portions 15. At least part of the surface of the concave portions 15 and / or at least part of the surface of the convex portions 16 has an uneven structure 13, and the protrusions 132 between the pits 131 are in the shape of hills. The concave portions 15 can be formed by etching, impact, rolling or stamping. The depth of the concave portions 15 is between 0.1 mm and 0.9 mm. An uneven structure 13 including multiple pits 131 and protrusions 132 is machined on the surfaces of the concave portions 15 and the convex portions 16. The spherical diameter of the pits 131 is 0.2 - 0.95 mm, preferably 0.4 - 0.65 mm. The pitch aa of the pits 131 ranges from 0.3 mm to 0.8 mm, preferably 0.6 mm. According to different product requirements, the surface roughness of the pits 131 can be designed to be ≤ 3.2 μm. The pits 131 are spherical pits 131 formed by spraying steel shots with a diameter of 0.6 - 1 mm onto the inner surface 11 of the disk body 1 at a pressure of 2 Mpa - 8 Mpa. The uneven height difference b (in this embodiment, it is the distance from the highest point of the protrusion 132 to the lowest point of the pit 131) is 45 - 85 μm, and the optimal value is 55 - 75 μm.

[0065] In some embodiments, it is also possible to process a cross-section into a circle, an ellipse or a polygon, such as a hexagon or a quadrilateral by rolling, stamping and other processing methods according to design requirements, and then perform stretch forming. If the pits 131 are in the shape of a polygon, the polygons can be evenly distributed by rolling or designed to be irregularly arranged according to needs. The diameter of the inscribed circle of the polygon is 0.2 - 0.95 mm, preferably 0.4 - 0.65 mm.

[0066] Example 3

[0067] Please refer to Figure 9 and Figure 10 , which is different from Example 1 in that an electrolytic layer or a plasma polishing layer is further provided between the uneven structure 13 and the physical vapor deposition layer 14.

[0068] Please refer to Figure 9 , the uneven structure 13 composed of the pits 131 and the protrusions 132 on the inner surface 11 of the disk body 1 is the same as that in Example 1, and will not be elaborated here.

[0069] Please refer to Figure 10 , the electrolytic layer or the plasma polishing layer is to machine an irregular rough surface at the nanometer or micrometer level on the surfaces of the pits 131 and the protrusions 132 through electrolysis or plasma polishing. The processing in this embodiment is formed by electrolytic processing.

[0070] In some embodiments, there are multiple combined processing methods, for example, an electrolytic layer or a plasma polishing layer is provided on the surface of part of the concave-convex structure 13, and a physical vapor deposition layer 14 is coated on the surface of part of the electrolytic layer or the plasma polishing layer, or part of the concave-convex structure 13, or part of the concave-convex structure 13 and part of the electrolytic layer or the plasma polishing layer, so as to form a variety of combined structures on the inner surface 11 of the disk body 1, to achieve different surface effects according to different usage requirements, or to achieve different surface effects in different areas on the surface of the disk body 1.

[0071] Embodiment 4

[0072] See also Figure 11 The present embodiment discloses a frying and grilling utensil, specifically an electric frying pan or an electric baking pan, comprising the frying pan of the first embodiment or the third embodiment and a body 2, wherein a heating element is installed in the body 2, and the heating element is located on a side of the pan body 1 away from the bottom surface 111, and can directly heat the pan body 1.

[0073] Embodiment 5

[0074] See also Figure 12 This embodiment discloses a frying and grilling utensil, which is different from the fourth embodiment in that the frying pan in the second embodiment is used.

[0075] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes, modifications, substitutions and variants, and these changes, modifications, substitutions and variants all fall within the scope of the utility model claimed for protection.

Claims

1. A frying pan, characterized in that, The invention comprises a disk body (1), wherein the disk body (1) has an inner surface (11), wherein the inner surface (11) comprises a bottom surface (111), wherein the bottom surface (111) is provided with a plurality of convex ribs (12), wherein the bottom surface (111) comprises a concave-convex structure (13) comprising a plurality of concave pits (131) and convex protrusions (132), wherein the concave-convex structure (13) at least covers the surface of the convex ribs (12), wherein the surface roughness of the concave pits (131) is less than the surface roughness of the convex protrusions (132), and at least a portion of the surface of the concave pits (131) and / or a portion of the surface of the convex protrusions (132) is provided with a physical vapor deposition layer (14).

2. The frying pan according to claim 1, characterized in that, The protrusion (132) is a hill-like morphology surrounding the pit (131), and the physical vapor deposition layer (14) is in direct contact with at least part of the surface of the pit (131) and / or part of the protrusion (132).

3. The frying pan according to claim 1 or 2, characterized in that, The bottom surface (111) further comprises a concave portion (15) and a convex portion (16) between the concave portions (15); at least a portion of the concave portion (15) and / or at least a portion of the convex portion (16) has a concave-convex structure (13) on its surface; and the protrusions (132) between the concave pits (131) are hill-shaped.

4. The frying pan according to claim 1 or 2, characterized in that, The concave-convex structure (13) and the base material of the disk body (1) are an integral structure, and the physical vapor deposition layer (14) is in direct contact with at least part of the surface of the concave pits (131) and / or part of the convex protrusions (132).

5. The frying pan according to claim 1 or 2, characterized in that, At least part of the surface of the pit (131) and / or at least part of the surface of the protrusion (132) is provided with an electrolytic layer or a plasma polishing layer, and the electrolytic layer or the plasma polishing layer is in direct contact with the physical vapor deposition layer (14).

6. The frying pan according to claim 1, characterized in that, The surface of the pit (131) is a spherical surface, and the diameter of the spherical surface of the pit (131) is 0.2-0.95 mm; the hole center distance (a) of the pit (131) ranges from 0.3-0.8 mm.

7. The frying pan according to claim 3, characterized in that The surface of the pit (131) is a spherical surface, and the diameter of the spherical surface of the pit (131) is 0.2-0.95 mm; the hole center distance (a) of the pit (131) ranges from 0.3-0.8 mm.

8. The frying pan according to claim 6 or 7, characterized in that, The spherical diameter of the pit (131) is 0.4-0.65 mm; the hole center distance (a) of the pit (131) is 0.6 mm.

9. A grilling appliance, characterized in that, The invention comprises a frying pan as claimed in any one of claims 1 to 8.

10. The grilling appliance according to claim 9, characterized in that, It also comprises a heating element, which is located on a side of the tray body (1) facing away from the bottom surface (111).

Images