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 utility model relates to a non-stick pan. BACKGROUND

[0002] US10194771B2 discloses a non-stick pan, which is provided with 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 good non-stick effect. The existing defects are that the non-stick effect depends solely on the non-stick coating, and the non-stick coating in the patent is directly coated on the inner surface of the pan body, so the bonding force between the non-stick coating and the pan body is poor, and the non-stick coating is easy to fall off, and the non-stick effect will be greatly reduced once the non-stick coating falls off.

[0003] US10258184B2 discloses a non-stick pan, which is provided with solid and dashed convex ribs on the inner surface of the pan body to form a specific concave-convex pattern, and a non-stick coating is provided in the inner concave part. The concave-convex pattern increases the heat transfer area to achieve rapid cooking. Since the inner concave part occupies most of the area, the non-stick effect of the non-stick pan is still achieved by the non-stick coating. Similarly, the non-stick coating in the patent is directly coated on the inner surface of the pan body, so the bonding force between the non-stick coating and the pan body is poor, and the non-stick coating is easy to fall off, and the non-stick effect will be greatly reduced once the non-stick coating falls off. SUMMARY

[0004] In order to overcome the above-mentioned deficiencies of the existing non-stick pan, the utility model provides a non-stick pan with better non-stick effect.

[0005] The technical scheme for solving the technical problem of the utility model is: a non-stick pan, comprising a metal pan body, the inner surface of the pan body has a concave pit to form a concave-convex part on the inner surface of the pan body.

[0006] The inner surface of the pan body has a hard layer with a hardness of 500HV or more, and the hard layer has pores.

[0007] A transparent sealing and connecting layer is covered on the hard layer to seal the pores of the hard layer, and part of the sealing and connecting layer enters the pores of part of the hard layer to be firmly combined with the hard layer.

[0008] An inorganic non-stick layer is sprayed on the sealing and connecting layer, and the inorganic non-stick layer is combined with the sealing and connecting layer.

[0009] Further, the pits are uniformly distributed on the inner surface of the pot body, the width of the pit is 0.5mm-1.5mm, the distance between the pits is 0.3mm-1mm, and the depth of the pit is 0.05mm-0.15mm;

[0010] The thickness of the hard layer is 25μm~45μm;

[0011] The thickness of the closed connecting layer is 1μm-2μm;

[0012] The thickness of the inorganic non-stick layer is 0.5μm-1.5μm.

[0013] Further, the material of the closed connecting layer is polysilazane.

[0014] Further, after the inorganic non-stick layer material is sprayed on the closed connecting layer, sintering is carried out at 280℃-320℃ for 8-12 minutes.

[0015] Further, the material of the inner surface of the pot body is iron, and the pretreatment process is a gas nitriding process, so as 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, so as to form a plasma layer on the inner surface of the pot body, and the plasma layer constitutes the hard layer. The material sprayed on 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, so as to form a hard oxidation layer on the inner surface of the pot body, and the hard oxidation 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, so as to form a plasma layer on the inner surface of the pot body, and the plasma layer constitutes the hard layer. The material sprayed on 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.).

[0016] The inorganic non-stick layer and the pit cooperate to obtain the non-stick effect when the pot is used for the first time: the inorganic non-stick layer can of course achieve the non-stick effect, and the pit can also help to improve the non-stick effect. During cooking, at least part of the pits store oil, and the food is lifted by the convex part outside the pit. After the pot is heated, the oil in the pit is heated and flows upward, thereby further lifting the food, and the air in the pit not filled with oil is also heated and flows upward, thereby further lifting the food, and further helping to improve the non-stick effect.

[0017] After a period of use, the inorganic non-stick layer may be partially damaged. Even then, the sealing layer can still achieve a certain degree of non-stick performance (especially when the sealing layer is made of polysilazane, which also provides a considerable non-stick effect and, after sintering, possesses considerable hardness, remaining intact for a period). Furthermore, the sealing layer seals the pores of the hard layer, preventing grease from penetrating into them. This ensures that even if the inorganic non-stick layer is damaged, a sufficient amount of grease can still be stored in the recesses, allowing it to rise and support the food when heated. Moreover, the sealing layer is transparent, so even if the inorganic non-stick layer is damaged, it does not affect the visual appeal of the pot.

[0018] After a period of use, the sealed bonding layer of this invention is also damaged. At this point, the hard layer at the damaged areas of the inorganic non-stick layer and the sealed bonding layer takes on a non-stick function. Because the hard layer has pores, grease can penetrate into and be stored in the pores after the inorganic non-stick layer and the sealed bonding layer are damaged. When the pot is heated again during the next use, the grease stored in the pores will seep out, thus achieving a non-stick effect. Furthermore, even if the hard layer is exposed at this time, because the hard layer has a hardness of over 500 HV, it will not be damaged even if it is scraped by a spatula for a long time, allowing for long-term use.

[0019] The beneficial effects of this utility model are as follows: First, the sealed connecting layer enters into the pores of part of the hard layer to firmly bond to the hard layer, while the inorganic non-stick layer is bonded to the sealed connecting layer. Therefore, the inorganic non-stick layer can be firmly set on the inner surface of the pot body with the help of the sealed connecting layer. Second, as can be seen from the above analysis, the non-stick pot of this utility model can achieve a good non-stick effect when initially used, and can still achieve a good non-stick effect after long-term use, and can be used for a long time. Attached Figure Description

[0020] Figure 1 This is a top view of the non-stick pan of this utility model.

[0021] Figure 2 This is a partial cross-sectional view of the non-stick pan of this utility model. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] Reference Figure 1 , Figure 2 A non-stick pan includes a metal pan body 1, the inner surface of which has pits 2 to form an uneven surface.

[0024] After undergoing a pretreatment process, a porous hard layer 3 is formed on the inner surface of the pot body 1, and the hardness of the hard layer 3 is above 500HV.

[0025] The hard layer 3 is covered with a transparent sealing layer 4 to seal the pores of the hard layer 3. The sealing layer 4 partially enters into the pores of the hard layer 3 to firmly bond to the hard layer 3.

[0026] An inorganic non-stick layer 5 is sprayed onto the sealed connecting layer 4, and the inorganic non-stick layer 5 is bonded to the sealed connecting layer 4.

[0027] In one embodiment, the pits 2 are evenly distributed on the inner surface of the pot body 1, the 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.

[0028] The width of the recess 2 reflects its size in terms of width. The width of the recess 2 should not be too large or too small. If the width of the recess 2 is too large, the liquid level of the oil that can be stored in the recess 2 will be too low, and the oil will not be able to flow to a sufficient level to support the food. If the width of the recess 2 is too small, the amount of oil that can be stored in the recess 2 will also be too small to flow to a sufficient level to support the food. A better shape for the recess 2 is circular, in which case the width of the recess 2 is its diameter. The distance between the two recesses (2) reflects the proportion of the recess area to the total area of ​​the concave-convex part. The distance between the two recesses (2) should not be too large or too small. If the distance is too small, the supporting effect of the inner side of the pot outside the recesses (i.e., the convex part relative to the recesses) on the food will be greatly weakened, and the food will sink into the recesses (2) and be difficult to be supported by the rising oil or air after heating. If the distance is too large, the amount of oil and air that can be stored in the recesses (2) will be insufficient, and the rising oil or air after heating in the pot will not be enough to support the food. The depth of the two recesses (2) should not be too deep or too shallow. If the depth is too deep, the oil stored in the recesses (2) will sink to the bottom and will not be able to rise enough to support the food. If the depth is too shallow, the amount of oil stored in the recesses (2) will be too small and also insufficient to rise enough to support the food. In summary, after a long period of exploration by the inventors, the relevant parameters of the pit 2 were finally determined to be as follows: the pit 2 is evenly distributed on the inner surface of the pot body 1, the width of the pit 2 is 0.5mm-1.5mm, the distance between the pits 2 is 0.3mm-1mm, and the depth of the pit 2 is 0.05mm-0.15mm, which can achieve the best non-stick effect.

[0029] In one embodiment, the thickness of the hard layer 3 is 25μm to 45μm. This thickness of the hard layer 3 ensures that the pores therein can store a sufficient amount of grease, so that when the inorganic non-stick layer 5 and the sealing connection layer 4 are damaged, a sufficient amount of grease will seep out from the pores to achieve a non-stick effect when the pot is heated.

[0030] In one embodiment, the thickness of the sealing connection layer 4 is 1μm to 2mm to ensure that the sealing connection layer 4 can effectively connect the rigid layer 3 and the inorganic non-adhesive layer 5.

[0031] In one embodiment, the inorganic non-stick layer 5 has a thickness of 0.5μm to 1.5μm. If the inorganic non-stick layer 5 is too thick, it will be difficult to bond effectively to the sealing connection layer 4. If it is too thin, it will be difficult to achieve a good non-stick effect and it will be destroyed quickly during use.

[0032] In one embodiment, the material of the sealing connection layer 4 is polysilazane. Polysilazane not only achieves a certain degree of non-stickness, but also has good wear resistance and high temperature resistance. After the inorganic non-stick layer is coated and sintered, the three-dimensional cross-linked structure formed by polysilazane can be well connected with the inorganic non-stick layer 5 and the hard layer 3, thereby effectively bonding the inorganic non-stick layer 5 to the inner surface of the pot body 1.

[0033] The inorganic non-stick layer 5 can be made of materials commonly used in the prior art, such as silicon nitride, silicon dioxide, alumina, and silicon carbide. In one embodiment, the connection between the inorganic non-stick layer 5 and the sealing connecting layer 4 is further achieved by a sintering process to make the inorganic non-stick layer 5 more firmly bonded to the sealing connecting layer 4. Typically, after the inorganic non-stick layer material is sprayed onto the sealing connecting layer 4, it needs to be sintered at 280℃-320℃ for 8-12 minutes to ensure a firm bond between the inorganic non-stick layer 5 and the polysilazane.

[0034] 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 nitrided layer on the inner surface of the pot body 1. This nitrided layer constitutes the hard layer 3, and the nitrided layer formed by the gas nitriding process can achieve a hardness of 500HV or higher.

[0035] In another embodiment, the inner surface of the pot body 1 is made of stainless steel, and the pretreatment process is plasma spraying to form a plasma layer on the inner surface of the pot body, which constitutes the hard layer 3. The material sprayed onto the inner surface of the pot body by plasma spraying can be MCrALY powder, or titanium powder, metal oxide powder, etc. (e.g., titanium oxide powder, aluminum oxide powder, zirconium oxide, etc.). The plasma layer formed by plasma spraying can achieve a hardness of 500 HV or higher.

[0036] 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 anodizing process to form a hard oxide layer on the inner surface of the pot body 1. This hard oxide layer constitutes the hard layer 3. The hard oxide layer formed by the hard anodizing process can achieve a hardness of 500 HV or higher.

[0037] In another embodiment, the inner surface of the pot body 1 is made of aluminum or aluminum alloy, and the pretreatment process is plasma spraying to form a plasma layer on the inner surface of the pot body 1, which constitutes the hard layer 3. The material sprayed onto the inner surface of the pot body by plasma spraying can be MCrALY powder, or titanium powder, metal oxide powder, etc. (e.g., titanium oxide powder, aluminum oxide powder, zirconium oxide, etc.). The plasma layer formed by plasma spraying can achieve a hardness of 500 HV or higher.

[0038] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] The embodiments of this utility model have been described above. However, this utility model is not limited to the above embodiments. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A non-stick pan, comprising a metal pan body, characterized in that: The inner surface of the pot body has pits, thereby forming a concave-convex part on the inner surface of the pot body; The inner surface of the pot body has a hard layer with a hardness of 500HV or higher, and the hard layer has pores. The hard layer is covered with a transparent sealing bonding layer to seal the pores of the hard layer, and the sealing bonding layer partially enters into the pores of the hard layer to firmly bond to the hard layer. An inorganic non-stick layer is sprayed onto the sealed connecting layer, and the inorganic non-stick layer is bonded to the sealed connecting layer.

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

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