Non-stick pan

Abstract

A non-stick pan comprises a metal pan body, and the inner surface of the pan body is provided with pits so that concave-convex parts can be formed on the inner surface of the pan body. A hard layer with pores is formed on the inner surface of the pot body after the pot body is subjected to a pretreatment process, and the hardness of the hard layer is more than 500HV; the hard layer is covered with a transparent closed connecting layer so as to close pores of the hard layer, and part of the closed connecting layer enters part of the pores of the hard layer so as to be firmly combined on the hard layer; an inorganic non-stick layer is sprayed on the closed connecting layer, and the inorganic non-stick layer is combined on the closed connecting layer.

Description

Technical Field

[0001] The invention relates to a non-stick pan. Background Art

[0002] US10194771B2 discloses a non-stick pan, which has ribs on the inner surface of the pan body, and grooves are formed between the ribs. At the same time, a non-stick coating is provided on the inner surface of the pan body, and the thickness of the non-stick coating on the ribs and in the grooves has specific constraints, so that the non-stick pan achieves a better non-stick effect. It also has the disadvantage that its non-stick effect depends solely on the non-stick layer, and the non-stick layer in the patent is directly coated on the inner surface of the pan body, and the bonding force between the non-stick layer and the pan body is poor, so the non-stick layer is easy to fall off, and once the non-stick layer falls off, its non-stick effect will be greatly reduced.

[0003] US10258184B2 discloses a non-stick pan, which is provided with solid and dotted ribs on the inner surface of the pan body to form a specific concave-convex pattern, and a non-stick layer is provided in the inner concave portion. The heat transfer area is increased by the concave-convex pattern to achieve fast cooking; since the inner concave portion of this design occupies most of the area, the non-stick effect of the non-stick pan is still achieved through the non-stick layer. Similarly, the non-stick layer in this patent is directly coated on the inner surface of the pan body, and the bonding force between the non-stick layer and the pan body is poor, so the non-stick layer is easy to fall off. Once the non-stick layer falls off, its non-stick effect will be greatly reduced. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings of the existing non-stick pans, the present invention provides a non-stick pan with better non-stick effect.

[0005] The technical solution of the present invention to solve the technical problem is: a non-stick pan, comprising a metal pan body, the inner surface of the pan body having pits so as to form a concave-convex portion on the inner surface of the pan body; After the pre-treatment process, a hard layer with pores is formed on the inner surface of the pot body, and the hardness of the hard layer is above 500 HV; The hard layer is covered with a transparent closed connection layer to close the pores of the hard layer, and the closed connection layer partially enters into the pores of the hard layer to be firmly bonded to the hard layer; An inorganic non-stick layer is sprayed on the closed connection layer, and the inorganic non-stick layer is combined on the closed connection layer.

[0006] Furthermore, the pits are evenly distributed on the inner surface of the pot body, the maximum width of the pits is 0.5mm-1.5mm, the distance between the pits is 0.3mm-1mm, and the depth of the pits is 0.05mm-0.15mm; The thickness of the hard layer is 25 μm to 45 μm; The thickness of the closed connection layer is 1 μm-2 μm; The inorganic non-stick layer has a thickness of 0.5 μm-1.5 μm.

[0007] Furthermore, the material of the closed connection layer is polysilazane.

[0008] Furthermore, the inorganic non-stick layer material is sprayed onto the closed connection layer and then sintered at 280° C.-320° C. for 8 minutes-12 minutes.

[0009] Further, the material of the inner surface of the pot body is iron, and the pretreatment process is a gas nitriding process to form a nitriding layer on the inner surface of the pot body, and the nitriding layer constitutes the hard layer. Alternatively: the material of the inner surface of the pot body is stainless steel, and the pretreatment process is a plasma spraying process to form a plasma layer on the inner surface of the pot body, and the plasma layer constitutes the hard layer. The material sprayed onto the inner surface of the pot body by the plasma spraying process can be MCrALY powder, or titanium powder, metal oxide powder, etc. (such as titanium oxide powder, aluminum oxide powder, zirconium oxide, etc.). Alternatively: the material of the inner surface of the pot body is aluminum or aluminum alloy, and the pretreatment process is a hard oxidation process to form a hard oxide layer on the inner surface of the pot body, and the hard oxide layer constitutes the hard layer. Alternatively, the material of the inner surface of the pot body is aluminum or aluminum alloy, and the pretreatment process is a plasma spraying process to form a plasma layer on the inner surface of the pot body, and the plasma layer constitutes the hard layer. The material sprayed onto the inner surface of the pot body by the plasma spraying process can be MCrALY powder, or titanium powder, metal oxide powder, etc. (such as titanium oxide powder, aluminum oxide powder, zirconium oxide, etc.).

[0010] When the present invention is first used, the inorganic non-stick layer and the pits cooperate to obtain a non-stick effect: the inorganic non-stick layer can of course achieve the non-stick effect, and the pits can also help improve the non-stick effect. During cooking, grease is stored in at least part of the pits, and the food in the pot is supported by the convex parts outside the pits that are raised relative to the pits. After the pot is heated, the grease in the pits is heated and surges upward, thereby further supporting the food, and the air in the pits that is not filled with grease is also heated and surges upward, thereby further supporting the food, thereby helping to improve the non-stick effect.

[0011] After the present invention has been used for a period of time, the inorganic non-stick layer is partially destroyed, and the closed connection layer can also achieve a certain non-stick effect (especially when the material of the closed connection layer is polysilazane, polysilazane can also achieve a considerable non-stick effect, and polysilazane has considerable hardness after sintering, and can also last for a period of time without being destroyed). In addition, the closed connection layer seals the pores of the hard layer to prevent grease from penetrating into the pores of the hard layer, thereby ensuring that a considerable amount of grease can still be stored in the pit when the inorganic non-stick layer is destroyed, so that the amount of grease in the pit can ensure that it can surge upward to lift the food after being heated. In addition, the closed connection layer is transparent, and even if the inorganic non-stick layer is destroyed, it will not affect the visual perception of the pot body.

[0012] After the present invention is further used for a period of time, the closed connecting layer is also destroyed. At this time, the hard layer at the place where the inorganic non-stick layer and the closed connecting layer are destroyed plays a non-stick role: because the hard layer has pores, after the inorganic non-stick layer and the closed connecting layer are destroyed, the grease can penetrate into the pores of the hard layer and be stored in the pores. When the pot is heated for the next use, the grease stored in the pores will emerge from the pores, thereby achieving a non-stick effect under the action of the emerging grease. Moreover, even if the hard layer is exposed at this time, since the hardness of the hard layer reaches more than 500HV, the hard layer will not be damaged even if it is shoveled for a long time, and can be used for a long time.

[0013] The beneficial effects of the present invention are: first, the closed connecting layer enters into the pores of part of the hard layer to be firmly bonded to the hard layer, and the inorganic non-stick layer is bonded to the closed connecting layer, so the inorganic non-stick layer can be firmly arranged on the inner surface of the pot body with the help of the closed connecting layer; secondly, from the above analysis, it can be seen that the non-stick pan of the present invention can achieve a good non-stick effect during initial use, and can still achieve a good non-stick effect after long-term use, and can be used for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a top view of the non-stick pan of the present invention.

[0015] Figure 2 It is a partial cross-sectional view of the non-stick pan of the present invention. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] Reference Figure 1 , Figure 2 A non-stick pan comprises a metal pan body 1, wherein the inner surface of the pan body 1 has pits 2 so as to form a concave-convex portion on the inner surface of the pan body 1.

[0018] After the pre-treatment process, a hard layer 3 with pores is formed on the inner surface of the pot body 1 , and the hardness of the hard layer 3 is above 500 HV.

[0019] The hard layer 3 is covered with a transparent closed connection layer 4 to close the pores of the hard layer 3 , and the closed connection layer 4 partially enters into the pores of the hard layer 3 to be firmly bonded to the hard layer 3 .

[0020] The closed connection layer 4 is sprayed with an inorganic non-stick layer 5 , and the inorganic non-stick layer 5 is combined with the closed connection layer 4 .

[0021] In one embodiment, the pits 2 are evenly distributed on the inner surface of the pot body 1, the maximum width of the pits is 0.5mm-1.5mm, the distance between the pits 2 is 0.3mm-1mm, and the depth of the pits 2 is 0.05mm-0.15mm.

[0022] The maximum width of the pit 2 reflects the size of the pit 2 in width. The maximum width of the pit 2 cannot be too large or too small. If the pit 2 is too large in width, the level of the fat that can be stored in the pit 2 is too low, and the fat is difficult to flow to the extent that the food can be lifted; if the pit 2 is too small in width, the amount of fat that can be stored in the pit 2 is too small, and the fat is also difficult to flow to the extent that the food can be lifted. A better shape of the pit 2 is a circle, in which case the maximum width of the pit 2 is its diameter. The distance between the pits 2 reflects the proportion of the area of ​​the pits 2 to the area of ​​the entire concave and convex part. The distance between the pits 2 should not be too large or too small. If the distance between the pits 2 is too small, the inner side of the pot outside the pits 2 (i.e., the convex part relative to the pits) will greatly weaken the lifting effect on the food, and the food will sink into the pits 2 and be difficult to be lifted by the surging fat or air after heating; if the distance between the pits 2 is too large, the amount of fat and air that can be stored in the pits 2 is insufficient, and the surging fat or air after heating in the pot is insufficient to lift the food. The depth of the pits 2 should not be too deep or too shallow. If the depth of the pits 2 is too deep, the fat stored in the pits 2 sinks to the bottom of the pits and is difficult to surge to the extent of lifting the food; if the depth of the pits 2 is too shallow, the amount of fat stored in the pits 2 is too small and is also difficult to surge to the extent of lifting the food. In summary, after long-term exploration by the inventors, it was finally determined that the relevant parameters of the pits 2 are limited to: the pits 2 are evenly distributed on the inner surface of the pot body 1, the maximum width of the pits 2 is 0.5mm-1.5mm, the distance between the pits 2 is 0.3mm-1mm, and the depth of the pits 2 is 0.05mm-0.15mm, which can achieve the best non-stick effect.

[0023] In one embodiment, the thickness of the hard layer 3 is 25 μm to 45 μm. The hard layer 3 of this thickness can ensure that the pores therein can store a sufficient amount of grease, so that after the inorganic non-stick layer 5 and the closed connection layer 4 are destroyed, when the pot is heated, a sufficient amount of grease will emerge from the pores to achieve a non-stick effect.

[0024] In one embodiment, the thickness of the closed connection layer 4 is 1 μm to 2 mm, so as to ensure that the closed connection layer 4 can effectively connect the hard layer 3 and the inorganic non-stick layer 5 .

[0025] In one embodiment, the inorganic non-stick layer 5 has a thickness of 0.5 μm to 1.5 μm. If the inorganic non-stick layer 5 is too thick, it is difficult to effectively combine with the closed connection layer 4. If it is too thin, it is difficult to achieve a good non-stick effect and it will be quickly destroyed during use.

[0026] In one embodiment, the material of the closed connection layer 4 is polysilazane. Polysilazane can not only achieve a certain degree of non-stickness, but also has good wear resistance and high temperature resistance. After sintering after coating the inorganic non-stick layer, the three-dimensional cross-linked structure of polysilazane can be well connected with the inorganic non-stick layer 5 and the hard layer 3, thereby effectively combining the inorganic non-stick layer 5 on the inner surface of the pot body 1.

[0027] The material of the inorganic non-stick layer 5 can be selected from common materials in the prior art, such as silicon nitride, silicon dioxide, aluminum oxide, silicon carbide, etc. In one embodiment, the connection between the inorganic non-stick layer 5 and the closed connection layer 4 also adopts a sintering process to make the inorganic non-stick layer 5 more firmly bonded to the closed connection layer 4. Generally, after the inorganic non-stick layer material is sprayed onto the closed connection layer 4, it needs to be sintered at 280°C-320°C for 8 minutes-12 minutes to make the inorganic non-stick layer 5 firmly bonded to the polysilazane.

[0028] In one embodiment, the inner surface of the pot body 1 is made of iron, and the pretreatment process is a gas nitriding process to form a nitriding layer on the inner surface of the pot body 1, and the nitriding layer constitutes the hard layer 3. The hardness of the nitriding layer formed by the gas nitriding process can reach above 500HV.

[0029] In another embodiment, the inner surface of the pot body 1 is made of stainless steel, and the pretreatment process is a plasma spraying process to form a plasma layer on the inner surface of the pot body, and the plasma layer constitutes the hard layer 3. The material sprayed onto the inner surface of the pot body by the plasma spraying process can be MCrALY powder, or titanium powder, metal oxide powder, etc. (such as titanium oxide powder, aluminum oxide powder, zirconium oxide, etc.). The plasma layer formed by the plasma spraying process can have a hardness of more than 500HV.

[0030] In another embodiment, the inner surface of the pot body 1 is made of aluminum or aluminum alloy, and the pretreatment process is a hard oxidation process to form a hard oxide layer on the inner surface of the pot body 1, and the hard oxide layer constitutes the hard layer 3. The hard oxide layer formed by the hard oxidation process can have a hardness of more than 500 HV.

[0031] In another embodiment, the inner surface of the pot body 1 is made of aluminum or aluminum alloy, and the pretreatment process is a plasma spraying process to form a plasma layer on the inner surface of the pot body 1, and the plasma layer constitutes the hard layer 3. The material sprayed onto the inner surface of the pot body by the plasma spraying process can be MCrALY powder, or titanium powder, metal oxide powder, etc. (such as titanium oxide powder, aluminum oxide powder, zirconium oxide, etc.). The plasma layer formed by the plasma spraying process can have a hardness of more than 500HV.

[0032] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0033] The above is an explanation of the embodiments of the present invention. However, the present invention is not limited to the above embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A non-stick pan, comprising a metal pan body, characterized in that: The inner surface of the pot body has pits so as to form a concave-convex portion on the inner surface of the pot body; After the pre-treatment process, a hard layer with pores is formed on the inner surface of the pot body, and the hardness of the hard layer is above 500 HV; The hard layer is covered with a transparent closed connection layer to close the pores of the hard layer, and the closed connection layer partially enters into the pores of the hard layer to be firmly bonded to the hard layer; An inorganic non-stick layer is sprayed on the closed connection layer, and the inorganic non-stick layer is combined on the closed connection layer.

2. The non-stick pan according to claim 1, characterized in that: The pits are evenly distributed on the inner surface of the pot body, the maximum width of the pits is 0.5mm-1.5mm, the distance between the pits is 0.3mm-1mm, and the depth of the pits is 0.05mm-0.15mm; The thickness of the hard layer is 25 μm to 45 μm; The thickness of the closed connection layer is 1 μm-2 μm; The inorganic non-stick layer has a thickness of 0.5 μm-1.5 μm.

3. The non-stick pan according to claim 1, characterized in that: The material of the closed connection layer is polysilazane.

4. The non-stick pan as claimed in claim 3, characterized in that: The inorganic non-stick layer material is sprayed onto the closed connection layer and then sintered at 280° C.-320° C. for 8 minutes-12 minutes.

5. The non-stick pan according to claim 2, characterized in that: The material of the inner surface of the pot body is iron, and the pretreatment process is a gas nitriding process to form a nitriding layer on the inner surface of the pot body, and the nitriding layer constitutes the hard layer.

6. The non-stick pan according to claim 2, characterized in that: The material of the inner surface of the pot body is stainless steel, and the pre-treatment process is a plasma spraying process to form a plasma layer on the inner surface of the pot body, and the plasma layer constitutes the hard layer.

7. The non-stick pan according to claim 2, characterized in that: The material of the inner surface of the pot body is aluminum or aluminum alloy, and the pre-treatment process is a hard oxidation process to form a hard oxide layer on the inner surface of the pot body, and the hard oxide layer constitutes the hard layer.

8. The non-stick pan according to claim 2, characterized in that: The material of the inner surface of the pot body is aluminum or aluminum alloy, and the pre-treatment process is a plasma spraying process to form a plasma layer on the inner surface of the pot body, and the plasma layer constitutes the hard layer.

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