CN219353629U

CN219353629U - Cooker, cooking utensil and air fryer convenient to clean

Info

Publication number: CN219353629U
Application number: CN202320209799.XU
Authority: CN
Inventors: 朱泽春; 王翔; 谢伟峰; 崔卫民
Original assignee: Joyoung Co Ltd
Current assignee: Joyoung Co Ltd
Priority date: 2023-02-14
Filing date: 2023-02-14
Publication date: 2023-07-18
Anticipated expiration: 2033-02-14

Abstract

The utility model provides a cooker convenient to clean, which comprises an inner metal layer, wherein a plurality of grooves are formed in the surface of the inner metal layer, the depth of each groove is 0.04-0.15mm, the width of each groove is 0.1-0.9mm, the width of each groove is larger than the depth of each groove, a metal protection film for reducing the surface energy of each inner metal layer is arranged on the inner metal layer, and the thickness of each metal protection film in each groove is 0.5-2% of the depth of each groove. On one hand, the utility model also provides a cooking utensil with the cooker. On the other hand, the utility model also provides an air fryer, and the technology is applied to the frying basket. By utilizing the technical scheme of the utility model, the pot can be conveniently cleaned.

Description

Cooker, cooking utensil and air fryer convenient to clean

[ field of technology ]

The utility model relates to the technical field of kitchen appliances, in particular to a cooker, a cooking utensil and an air fryer which are convenient to clean.

[ background Art ]

In order to realize non-sticking, the prior art cookware is generally provided with a chemical non-sticking coating such as Teflon on the inner surface of the cookware. Chemical coatings such as Teflon are widely applied to frying pans, electric chafing dishes, electric cooker cookers, air frying pans and other appliances, but the chemical coatings such as Teflon have the defect of easy falling off, and especially the chemical coatings are very easy to fall off after long-term use or scratch with hard materials, and the non-stick performance of the cookers can be seriously affected after the coating falls off. In order to prolong the service life of the cookware, the cookware with the chemical non-stick coating is generally not recommended to be cleaned by using hard materials such as steel wire balls, and the non-stick performance is obviously reduced when the chemical coatings such as Teflon are removed, so that the user experience is affected, and the cookware is to be lifted.

In the prior art, in order to solve the problem that chemical coatings such as Teflon fall off, a scheme is that grooves are formed in the surface of a pot, and the chemical coatings such as Teflon are arranged in the grooves, so that the coating is prevented from falling off, but the chemical coatings still exist in the structure.

In the prior art, a plurality of protrusions are arranged on the surface of the pot to reduce adhesiveness and achieve a non-stick effect, but the structure is easy to cause liquid to flow at a low position to influence non-stick performance, so that the pot is to be lifted.

[ utility model ]

The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide the cooker convenient to clean, which can promote the non-stick performance so as to conveniently clean the cooker.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a convenient abluent pan, the pan includes interior metal level, the surface of interior metal level is equipped with a plurality of recesses, the degree of depth of recess is 0.04-0.15mm, the width of recess is 0.1-0.9mm, the width of recess is greater than the degree of depth of recess, be equipped with the metal protection film that reduces its surface energy on the interior metal level, the metal protection film is located the thickness of recess is 0.5% -2% of recess degree of depth.

In an embodiment of the present utility model, the hardness of the surface of the metal protection film is greater than the hardness of the surface of the inner metal layer.

In an embodiment of the utility model, the thickness of the metal protection film is 0.5um to 2.5um.

In an embodiment of the present utility model, supporting ribs are disposed between the grooves, and the width of the supporting ribs is greater than the depth of the grooves.

In an embodiment of the present utility model, a width of the supporting rib is smaller than a width of the groove.

In an embodiment of the utility model, the roughness in the groove is greater than the roughness at the support rib.

In an embodiment of the utility model, the grooves are formed by etching or laser engraving or stamping.

In an embodiment of the utility model, the metal protection film is covered on the inner metal layer by a physical vapor deposition method.

In an embodiment of the present utility model, the distributed areas of the plurality of grooves cover more than 2/3 of the inner surface of the pan.

The utility model also provides a cooking utensil, which comprises a pot body and a pot cover, wherein the pot body is internally provided with the pot, and the pot is convenient to clean.

The utility model also provides an air fryer, which comprises a fryer body, wherein a frying basket is arranged in the fryer body, the frying basket comprises an inner metal layer, a plurality of grooves are formed in the surface of the inner metal layer, the depth of each groove is 0.04-0.15mm, the width of each groove is 0.1-0.9mm, the width of each groove is larger than the depth of each groove, a metal protection film for reducing the surface energy of each inner metal layer is arranged on the inner metal layer, and the thickness of each metal protection film in each groove is 0.5-2% of the depth of each groove.

The utility model has the following beneficial effects:

1. the cooker convenient to clean comprises an inner metal layer, wherein the surface of the inner metal layer is provided with a plurality of grooves, the contact area of the cooker can be increased by arranging the grooves, so that the heating area is increased, the depth of each groove is 0.04-0.15mm, the width of each groove is 0.1-0.9mm, the width of each groove is larger than the depth of each groove, the depth is shallow and the width is larger, dirt can be prevented from being hidden, the cooker is convenient to clean, the inner metal layer is provided with a metal protection film for reducing the surface energy of the inner metal layer, the inner surface of the cooker is more stable, food residues or rice starch particles are not easy to remain, and the surface of the cooker is convenient to clean, and the thickness of the metal protection film in each groove is 0.5-2% of the depth of each groove. The thickness of the metal protection film is far smaller than the depth of the groove, so that the groove can be prevented from being filled up by the arrangement of the metal protection film, and the existence of the groove is ensured. The thickness of the metal protection film and the depth relation of the groove are set, and the surface energy of the inner surface of the cooker is reduced, so that the contact area of pollutants is small, the acting force is weak, the pollutants are not easy to infiltrate by water, when water drops roll on the surface, the pollutants are easy to take away, the food has certain self-cleaning characteristics, the food is easy to fall off on the surface, and the non-tackiness can be improved. The metal protective film is not a chemical coating such as the existing Teflon and the like, and is not easy to fall off during cleaning.

2. The hardness of the surface of the metal protection film is greater than that of the surface of the inner metal layer. The arrangement of the metal protective film can obviously improve the wear resistance of the cookware, and the cookware is conveniently cleaned by means of hard materials such as steel wire balls.

3. Support ribs are arranged between the grooves, and the width of each support rib is larger than the depth of each groove. The support rib belongs to a relatively higher position in the inner surface of the cooker, the groove belongs to a relatively lower position, and the width of the support rib is bigger, so that the probability of dirt collection in the groove can be reduced.

4. The roughness in the groove is larger than the roughness at the supporting rib. The surface of the hydrophobic material is rough, so that the contact area between the hydrophobic material and the pollutant is small, the acting force is weak, and the inside of the groove is less prone to being polluted.

These features and advantages of the present utility model will be disclosed in detail in the following detailed description and the accompanying drawings.

[ description of the drawings ]

The utility model is further described with reference to the accompanying drawings:

fig. 1 is a schematic view of a cooking appliance according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of the cooperation of a pot cover and a pot according to an embodiment of the present utility model;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

fig. 4 is a partial enlarged view at B in fig. 2.

Reference numerals:

the cooker comprises a cooker body 1, a cooker cover 2, a cooker 3, a flange 31, an inner metal layer 32, a uniform heating aluminum layer 33, an outer stainless steel layer 34, a metal protection film 35, supporting ribs 36, a sealing ring 4, a sealing lip 41, a groove 5 and a heating device 6.

[ detailed description ] of the utility model

The utility model provides a cooker convenient to clean, which comprises an inner metal layer, wherein a plurality of grooves are formed in the surface of the inner metal layer, the depth of each groove is 0.04-0.15mm, the width of each groove is 0.1-0.9mm, the width of each groove is larger than the depth of each groove, a metal protection film for reducing the surface energy of each inner metal layer is arranged on the inner metal layer, and the thickness of each metal protection film in each groove is 0.5-2% of the depth of each groove. On one hand, the utility model also provides a cooking utensil with the cooker. On the other hand, the utility model also provides an air fryer, and the technology is applied to the frying basket. By utilizing the cooker provided by the utility model, the non-sticking effect can be improved, and the cooker is convenient to clean.

The technical solutions of the embodiments of the present utility model will be explained and illustrated below with reference to the drawings of the embodiments of the present utility model, but the following embodiments are only preferred embodiments of the present utility model, and not all embodiments. Based on the examples in the implementation manner, other examples obtained by a person skilled in the art without making creative efforts fall within the protection scope of the present utility model.

Example 1

Referring to fig. 1-3, the present embodiment provides a cooker that is convenient to clean, the cooker 3 includes an inner metal layer 32, the cooker has a containing cavity for containing food materials, and the cooker may be understood as a frying pan, a soup pot, an electric chafing dish, etc., and may also be understood as an inner container of an electric cooker or an electric pressure cooker. The cooker may be made of multiple metal layers, and the inner metal layer in this embodiment refers to the innermost metal layer of the cooker, for example, the cooker in this embodiment is made of three layers of steel, aluminum and steel, and the middle is made of aluminum to improve heat conductivity, and the innermost steel is the inner metal layer in this embodiment, which can refer to fig. 3, that is, the cooker includes an inner metal layer 32, a heat-equalizing aluminum layer 33 and an outer stainless steel layer 34. Of course, in other embodiments, the pot may be made of two layers of aluminum and steel, and the outside is sprayed with a protective material such as organic silicon, so that the aluminum or steel in the inner layer is the inner metal layer in this embodiment. The pan may also be aluminum or steel or another metal layer only, which is the inner metal layer of the present embodiment. Preferably, the inner metal layer 32 of this embodiment is an inner stainless steel layer, the surface of the inner metal layer is provided with a plurality of grooves 5, the contact area of the cooker can be increased through the plurality of grooves 5, so that the heating area is increased, the depth of the grooves is 0.04-0.15mm, the depth is shallower, dirt collection can be avoided, cleaning is convenient, the inner metal layer is provided with a metal protection film 35 for reducing the surface energy of the inner metal layer, so that the inner surface of the cooker is more stable, food residues or rice starch particles are not easy to remain, cleaning is convenient to be carried out on the surface of the cooker, and the thickness of the metal protection film 35 in the grooves is 0.5% -2% of the depth of the grooves. The thickness of the metal protection film 35 is much smaller than the groove depth, specifically, in this embodiment, the thickness of the metal protection film does not exceed 2% of the groove depth, and the arrangement of the metal protection film has little influence on the groove depth, so that the arrangement of the metal protection film can be avoided to fill up the groove and ensure the existence of the groove. The surface energy of the inner surface of the pot can be reduced by the additionally arranged metal protective film, and the contact area of pollutants is small, the acting force is weak, the pollutants are not easy to infiltrate by water, and the pollutants are easy to be taken away when water drops roll on the surface, so that the pot has certain self-cleaning characteristics by combining the depth dimension of the grooves and the arrangement of the thickness of the metal protective film and the depth relation of the grooves. The metal protective film of this example is not a conventional chemical coating such as teflon, and therefore is not easily detached even when cleaned. The plurality of grooves comprise a bottom groove positioned at the bottom of the pot and a side groove positioned at the wall of the pot, and the maximum length of the side groove is larger than that of the bottom groove. The maximum length of the side grooves is larger than that of the bottom grooves, so that the flow of liquid on the pot wall can be facilitated, the absorption influence of the grooves on the liquid is reduced, the aggregation effect of the liquid on the pot bottom can be improved, and the pot is convenient to manufacture and shape. As a preferred embodiment, the bottom groove is circular, having a diameter dimension, i.e. its largest dimension, the side groove is oval, and the oval shape comprises a length dimension and a width dimension, the width dimension of which is substantially the same as the diameter dimension of the bottom circular groove, and the length dimension of which is its largest dimension, so that its length dimension will be larger than the largest dimension of the bottom groove. For example, if the bottom groove has a diameter of 0.5mm, the side groove has an oval shape, a length dimension of 0.6mm, and a width dimension of 0.5mm, the maximum length of the bottom groove is 0.5mm, and the maximum size of the side groove is 0.6mm.

The technical scheme of the embodiment is that the principle of convenient cleaning is mainly as follows: firstly, the metal layer on the inner surface of the cooker is provided with a plurality of grooves 5, the depth of each groove is 0.04-0.15mm, secondly, the thickness of each metal protection film is not more than 2% of the depth of each groove, so that the arrangement of each metal protection film basically does not influence the physical effect of each groove, the physical effect of each groove is mainly that the diameter of a water drop is about 0.2-7mm, the depth of each groove is smaller than 0.2mm, the water drops can form a spherical body under the action of self tension, a complete water drop spherical body cannot be contained in each groove, a layer of very thin metal protection film with reduced surface energy is arranged on each groove, the water drop spherical body rolls on each metal protection film, pollutants are easily taken away, and the metal protection film has certain self-cleaning characteristics, so that a good non-sticking effect is formed, and is close to or even better than that of the existing Teflon and other chemical coatings.

The low surface energy property, thickness and groove depth relationship of the metal protective film 35 are key features of the present utility model, and applicants have found through extensive testing that the different thickness to groove depth ratios affect the non-stick properties without changing the metal protective film material. The non-tackiness evaluation adopts national standard GBT32095.2-2015, which is named as non-tackiness surface Performance and test procedure of household food metal cooking utensil, part 2: non-tackiness and abrasion resistance test specifications, the contents in which non-tackiness was evaluated are extracted as follows in Table 1.

Table 1 evaluation of non-sticking test results of cooked rice

Sequence number	Evaluation requirement	Evaluation grade
			1	The cooking utensil is gently shaken or no shaking is needed, and all rice can fall off from the utensil	Class I
2	The light-shaking cooking utensil still has rice stuck on the coating, and the weight of the rice is less than or equal to 50g	Class II
			3	The light-shaking cooking utensil still has rice stuck on the coating, and the weight of the rice is not less than 50g and not more than 50g	Class III
4	The light-shaking cooking utensil still has rice stuck on the coating, and the weight of the rice is more than 100g	Grade IV

The thickness of the metal protective film and the depth of the groove were changed under the condition that other conditions such as the cooking environment and the metal protective film material were not changed, and the following table 2 was obtained according to the above non-tackiness rating.

TABLE 2 evaluation of non-tackiness at different thickness/depth

As can be seen from the table, when the depth of the groove is 0.04-0.15mm and the thickness of the metal protective film in the groove is 0.5% -2% of the depth of the groove, the rice can obtain the standard of II-level non-tackiness in national standards, the non-tackiness can be better, and when the thickness/depth is more than 2%, such as test example 6 and test example 17, the non-tackiness can be obviously deteriorated, and the user experience is affected.

In this embodiment, the hardness of the surface of the metal protection film is greater than the hardness of the surface of the inner metal layer. The arrangement of the metal protective film can obviously improve the wear resistance of the cookware, and the cookware is conveniently cleaned by means of hard materials such as steel wire balls.

Referring to fig. 3, in the present embodiment, the thickness of the metal protection film is 0.5um to 2.5um. The thickness of the metal protection film is far smaller than the depth of the groove, and the groove can be prevented from being filled up by the arrangement of the metal protection film. The metal protection film has the main functions of protecting the inner metal layer, reducing the surface energy of the inner surface of the cooker, and improving the hardness of the surface of the inner metal layer so as to conveniently clean the inner surface of the cooker. When the thickness is less than 0.5um, the processing difficulty is larger, the adhesive force can be reduced, the metal protection film is easy to fall off or is not fully covered during processing, and when the thickness is more than 2.5um, the material of the metal protection film is wasted and the depth of the groove is easy to influence.

In this embodiment, support ribs 36 are disposed between the grooves, and the width of the support ribs is greater than the depth of the grooves. The support rib belongs to a relatively higher position in the inner surface of the cooker, the groove 5 belongs to a relatively lower position, and the width of the support rib is bigger, so that the probability of dirt collection in the groove can be reduced.

In this embodiment, the width of the ribs 36 is smaller than the width of the grooves. Because the width of the groove is bigger and the depth is smaller, the groove can be conveniently cleaned during cleaning.

It can be appreciated that in this embodiment, the width of the groove is greater than the depth of the groove, so that the groove with the size level can be processed conveniently, and deformation caused by too low strength of the supporting rib can be avoided.

In this embodiment, the roughness in the groove is greater than the roughness at the support rib. The surface of the hydrophobic material is rough, so that the contact area between the hydrophobic material and the pollutant is small, the acting force is weak, and the inside of the groove is less prone to being polluted.

In this embodiment, the grooves are formed by etching or laser engraving or stamping. In the specific process, the plate can be processed to form a groove, and then stretched to form the pot shape of the pot.

In this embodiment, the metal protection film is covered on the inner metal layer by physical vapor deposition (Physical Vapor Deposition abbreviated as PVD). Vapor deposition is a process of forming a film of a low surface energy substance on the surface of a substrate by chemical or physical deposition using different low surface substances.

Physical vapor deposition (Physical Vapor Deposition abbreviated as PVD) is a method of vaporizing a coating material by physical means (e.g., evaporation, sputtering, etc.), and depositing a film on a substrate surface. In addition to conventional vacuum evaporation and sputter deposition techniques, various ion beam deposition, ion plating and ion beam assisted deposition techniques have been vigorously developed over the last 30 years. The deposition types include vacuum evaporation, sputtering plating, ion plating and the like. Although the physical vapor deposition technology is five-flower eight-door, three links of vapor deposition, namely vapor phase transportation and deposition film formation of plating materials (targets) in vapor phase are all required to be realized.

In this embodiment, the physical vapor deposition method is preferably adopted, which is to bombard the target material (chromium, nickel, titanium, etc.) with plasma argon (ar+) ions and electrons, and sputter the target material with small molecular groups onto the surface of the base material (inner metal layer) of the pot, and the combination of the surface of the base material and the molecular groups is high and approaches to the metal bond energy, so that the metal protective layer is difficult to separate. The Vickers hardness of the surface is more than 1800 and is far higher than that of a base material (when the inner metal layer is stainless steel, the Vickers hardness is about 250), the surface compactness is good, and the non-sticking and ultra-high wear-resistant scratch resistance is enhanced; and the chemical stability of the metal protective film can not react after high temperature, and the color is difficult to change.

In an embodiment of the present utility model, the distributed areas of the plurality of grooves cover more than 2/3 of the inner surface of the pan. The grooves can be distributed in the lower areas of the bottom wall and the side wall of the cooker, and the upper areas of the side wall have small probability of contacting with food materials, so that the grooves can be arranged, and of course, the grooves can also be uniformly distributed on the inner surface of the cooker.

The utility model also provides an air fryer, which comprises a fryer body, wherein a frying basket is arranged in the fryer body, the frying basket comprises an inner metal layer, a plurality of grooves are formed in the surface of the inner metal layer, the depth of each groove is 0.04-0.15mm, a metal protection film for reducing the surface energy of the inner metal layer is arranged on the inner metal layer, and the thickness of the metal protection film in each groove is 0.5-2% of the depth of each groove. The frying basket adopting the scheme can also have good non-stick performance, and is convenient for a user to clean the frying basket.

Example two

The embodiment provides a manufacturing method of a non-stick pan, and the non-stick pan can be applied to the pan or the frying basket of the first embodiment.

The manufacturing method of the non-stick pan provided by the embodiment comprises the following steps:

step S1: providing a composite metal plate, wherein the composite metal plate comprises an outer stainless steel layer, a heat-homogenizing aluminum layer and an inner stainless steel layer, and etching or engraving or pressing the surface of the inner stainless steel layer to form a groove array;

step S2: stretching the composite metal plate provided with the groove arrays to form a pot blank, wherein the groove arrays are positioned on the inner surface of the pot blank;

step S3: and polishing and cleaning the inner surface of the pot blank, and performing PVD processing on the cleaned pot blank to form a metal protection film on the inner surface of the pot blank, wherein the thickness of the metal protection film is 0.5um to 2.5um, and the thickness of the metal protection film is smaller than the depth of the grooves in the groove array.

By using the manufacturing method of the non-stick pan, the metal protection film is formed through PVD processing, the thickness of the metal protection film is smaller than the depth of the grooves in the groove array, the grooves can be prevented from being filled up by the arrangement of the metal protection film, and the existence of the grooves is ensured. The added metal protective film can reduce the surface energy of the inner surface of the pot, so that the contact area of pollutants is small, the acting force is weak, the pollutants are not easy to infiltrate by water, and the pollutants are easy to take away when water drops roll on the surface, so that the pot has certain self-cleaning property. By PVD processing, the metal protective layer is difficult to separate due to the high bonding of the substrate surface to the clusters, approaching the metal bond energy. The Vickers hardness of the surface is more than 1800 and is far higher than that of a base material (when the inner metal layer is stainless steel, the Vickers hardness is about 250), the surface compactness is good, and the non-sticking and ultra-high wear-resistant scratch resistance is enhanced. The cooker of the embodiment is formed by compounding the outer stainless steel layer, the uniform heating aluminum layer and the inner stainless steel layer 3 layers, can have a good heat conduction effect through the middle aluminum layer, can have a magnetic conduction effect through the outer layer or the inner layer stainless steel layer, and realizes electromagnetic heating.

Further, step S4 is included, laser lithography processing is conducted on the pot blanks with the metal protective films formed, so that scale marks are formed in the groove arrays in a carving mode. The use of the user can be facilitated by setting the scale marks.

Further, the step S3 further includes performing photolithography or sand blasting on the groove array on the inner surface of the pot embryo to form a rough surface in the groove. The rough surface can promote the adhesive force, and is convenient for the adhesion of the metal protective film and not easy to fall off.

Further, the photolithography or sandblasting treatment is provided before polishing or before cleaning.

In this embodiment, the thickness of the metal protective film is 0.8um to 1.5um. The thickness is controlled within this range, and the covering effect and cost control of the metal protective film can be made more excellent.

In this embodiment, at least some of the grooves in the groove array are any one or a combination of a circular shape, an elliptical shape, or a water drop shape. The groove array of the present embodiment is formed of a plurality of grooves, and the shape of the grooves may be various shapes as described above. The shape of the groove is mainly the shape exhibited by the cross section of the groove. Through the recess of multiple shape, can design diversified pattern, promote the aesthetic property of product.

In this embodiment, the groove array on the inner surface of the pot embryo includes a first array located at the bottom of the pot and a second array located at the wall of the pot, and the grooves in the second array are flat. The groove arrays are distributed at the bottom and the wall of the pot, and the grooves in the second array are flat, so that the flow of liquid on the wall of the pot is facilitated, and the absorption influence of the grooves on the liquid is reduced.

The embodiment also provides a 0-coating non-stick cooking utensil, which can be referred to as fig. 1, and comprises a pot body and a non-stick pot arranged in the pot body, wherein the non-stick pot is manufactured by the method; the heating device is arranged in the pot body, and the groove array at least covers the heating device. That is, the area covered by the groove array in this embodiment is larger than the area covered by the heating device, so that the heating areas are ensured to have the groove array, and the heating areas are most easy to stick to the pot during cooking, and the non-stick effect can be improved through the arrangement of the area of the groove array.

Further, referring to fig. 4, the non-stick pan further includes a flange 31, and the groove array extends onto the flange. The groove arrays are distributed on the bottom and the wall of the pot and extend to the turnup, so that special positioning treatment is not needed to be carried out on the composite metal plate during manufacturing, the whole area of the surface of the inner stainless steel layer can be etched or carved or pressed to form the groove arrays, and then the groove arrays are distributed on the bottom, the wall and the turnup when the pot embryo is formed by stretching.

Further, the sealing ring structure further comprises a sealing ring 4, wherein the sealing ring is covered on the groove array extending to the flange, and the groove array extending to the flange forms a plurality of sealing ring exhaust grooves. When the pot cover is covered on the pot body, the sealing ring is used for sealing the gap between the pot cover and the pot. In this embodiment, the recess array on the turn-over forms the exhaust groove with the cooperation of sealing washer, and when uncapping, the exhaust groove can communicate with the external world at first, avoids the sealing washer to inhale the pot.

While the utility model has been described in terms of embodiments, it will be appreciated by those skilled in the art that the utility model is not limited thereto but rather includes the drawings and the description of the embodiments above. Any modifications which do not depart from the functional and structural principles of the present utility model are intended to be included within the scope of the appended claims.

Claims

1. The utility model provides a conveniently abluent pan, the pan includes interior metal level, its characterized in that, the surface of interior metal level is equipped with a plurality of recesses, the degree of depth of recess is 0.04-0.15mm, the width of recess is 0.1-0.9mm, the width of recess is greater than the degree of depth of recess, be equipped with the metal protection film that reduces its surface energy on the interior metal level, the metal protection film is located the thickness of recess is 0.5% -2% of recess degree of depth.

2. The easy-to-clean cooker according to claim 1, wherein the metal protective film has a surface hardness greater than that of the inner metal layer.

3. The easy-to-clean cooker according to claim 1, wherein the thickness of the metal protective film is 0.5um to 2.5um.

4. The easy-to-clean cooker according to claim 1, wherein the grooves are provided with supporting ribs therebetween, and the width of the supporting ribs is larger than the depth of the grooves.

5. The easy-to-clean cooker according to claim 4, wherein the width of the support rib is smaller than the width of the groove.

6. The easy-to-clean cooker according to claim 4, wherein the roughness in the groove is greater than the roughness at the support rib.

7. The easy-to-clean cooker according to claim 1, wherein said metal protective film is coated on the inner metal layer by physical vapor deposition.

8. The easy-to-clean cooker according to claim 1, wherein the area in which the plurality of grooves are distributed covers more than 2/3 of the inner surface of the cooker.

9. A cooking utensil comprising a pot body and a pot cover, wherein the pot body is internally provided with the pot, and the cooking utensil is a pot convenient to clean according to any one of claims 1 to 8.

10. The utility model provides an air fryer, includes the pot body, is equipped with the frying basket in the pot body, a serial communication port, the frying basket includes interior metal level, the surface on interior metal level is equipped with a plurality of recesses, the degree of depth of recess is 0.04-0.15mm, the width of recess is 0.1-0.9mm, the width of recess is greater than the degree of depth of recess, be equipped with the metal protection film that reduces its surface energy on the interior metal level, the metal protection film is located the thickness of recess is 0.5% -2% of recess degree of depth.