Inner pot and cooking appliance with same

Abstract

The utility model provides a kind of pot and the cooking utensil with it, wherein, pot includes: bottom wall;Side wall, connect in the upper end of bottom wall;Port portion flanging, set in the upper end of side wall;Magnetic conducting layer, set on bottom wall;Wherein, the hardness of side wall is greater than the hardness of bottom wall.The technical scheme of the application can effectively solve the problem of low yield rate of pot for cooperating with IH heating disc in related technology.

Description

Technical Field

[0001] This utility model relates to the field of small household appliance technology, and more specifically, to a pot inner pot and a cooking utensil having the same. Background Technology

[0002] Among related technologies, IH (electromagnetic induction heating) technology has advantages over traditional hot plate heating technology, such as high heating efficiency, precise temperature control, and energy saving, and is increasingly widely used in cooking appliances such as rice cookers and electric pressure cookers.

[0003] In order to work with the IH heating plate, a magnetic layer needs to be set on the inner pot of the cooking appliance. Generally, this is done by hot-pressing the magnetic layer onto the metal heat-conducting inner pot. During the hot-pressing process, the metal heat-conducting inner pot will anneal, which will reduce its structural strength. When carrying out subsequent processing steps of the metal heat-conducting inner pot, it is easy to deform, resulting in a lower yield rate. Utility Model Content

[0004] The main objective of this invention is to provide a pot inner liner and a cooking appliance having the same, in order to solve the problem of low yield rate of pot inner liners used in conjunction with IH heating plates in related technologies.

[0005] To achieve the above objectives, according to one aspect of the present invention, a pot inner pot is provided, comprising: a bottom wall; a side wall connected to the upper end of the bottom wall; a flanged opening disposed at the upper end of the side wall; and a magnetic conductive layer disposed on the bottom wall; wherein the hardness of the side wall is greater than the hardness of the bottom wall.

[0006] The present invention employs a magnetically conductive layer disposed on the bottom wall and used to cooperate with the IH heating plate to generate heat. This heat is transferred to the bottom wall and side walls to heat the food inside the pot. During the processing of the pot interior, the flanging of the rim is a relatively late step, which can easily lead to deformation of the already shaped bottom and side walls. In this application, because a magnetically conductive layer is pressed onto the bottom wall, its relatively high hardness makes the composite structure formed by the bottom wall and the magnetically conductive layer less prone to deformation. Furthermore, since the side walls are harder than the bottom wall, they are also less prone to deformation, thereby improving the yield rate during the pot interior processing. Therefore, the technical solution of this application effectively solves the problem of low yield rates in pot interiors used with IH heating plates in related technologies.

[0007] Furthermore, the bottom wall has a first hardness H1, and the side wall has a second hardness H2. The first hardness H1 and the second hardness H2 satisfy the following condition: 5HB ≤ H2 - H1 ≤ 10HB. By controlling the difference between the second hardness H2 and the first hardness H1 within the above range, while ensuring that the composite layer formed by the bottom wall and the magnetic conductive layer and the side wall are not easily deformed, the process requirements during the hardening process of the side wall are reduced as much as possible, resulting in a lower manufacturing cost for the pot liner.

[0008] Furthermore, the sidewall has a second hardness H2, and the flange at the mouth has a third hardness H3. The second hardness H2 and the third hardness H3 satisfy the following condition: 8HB ≤ H2 - H3 ≤ 13HB. Making the third hardness H3 of the flange at the mouth relatively low makes it easier to process the flange at the mouth.

[0009] Furthermore, the second hardness H2 satisfies: 33HB≤H2≤38HB; and / or, the third hardness H3 satisfies: 25HB≤H3≤30HB. By controlling the second hardness H2 within the above range, it is possible to ensure that the sidewall has a certain hardness to resist the deformation force during subsequent processing; by controlling the third hardness H3 within the above range, the pot blank used for processing the flanged opening is easier to bend, thus making the flanged opening process easier.

[0010] Furthermore, the bottom wall, side walls, and opening flange are formed from the same sheet material. Part of this same sheet is stretched or spun to form the side walls, resulting in a side wall with a higher hardness than the bottom wall. By stretching and thinning the same sheet to form the side walls, the grains on the surface of the stretched or spun portion of the sheet flow and break down during the stretching process, forming smaller, finer grain structures. This results in a side wall with greater hardness and better corrosion resistance.

[0011] Furthermore, the bottom wall has a first thickness T1, and the side wall has a second thickness T2, wherein the first thickness T1 and the second thickness T2 satisfy the condition: 0.4 ≤ T2 / T1 ≤ 0.8. By controlling T2 / T1 within the above range, it is possible to achieve side wall hardening while avoiding damage to the side wall.

[0012] Furthermore, the first thickness T1 satisfies: 2mm ≤ T1 ≤ 5mm; and / or, the second thickness T2 satisfies: 1mm ≤ T2 ≤ 3mm. Controlling the first thickness T1 within the above range can balance the deformation resistance of the composite layer formed by the bottom wall and the magnetic conductive layer with the economy of the pot liner processing; controlling the second thickness T2 within the above range can achieve sidewall hardening while avoiding damage to the sidewall.

[0013] Furthermore, there is a transition arc wall between the bottom wall and the side wall, and the radius R of the transition arc wall satisfies: 12mm≤R≤15mm. Controlling the radius R within the above range, on the one hand, makes the overall size of the transition arc wall smaller and the size of the side wall larger, increasing the capacity of the pot; on the other hand, it can also reduce heat dissipation at the transition arc wall position, so that more heat can be used to heat the food in the pot, improving heating efficiency.

[0014] Furthermore, the flanged opening includes an outer extension and an inner extension. The outer extension connects to the upper end of the side wall and extends outward along the radial direction of the pot liner. The inner extension connects to the outer end of the outer extension and extends inward along the radial direction of the pot liner. The outer and inner extensions work together to form a folded structure, increasing the thickness of the flanged opening and facilitating easy handling during use. Simultaneously, the folded structure also increases the structural strength of the flanged opening, making it less prone to deformation.

[0015] Furthermore, the sidewall includes a straight wall section and a constricted section located at the upper end of the straight wall section. The cross-sectional area of ​​the constricted section gradually decreases from bottom to top. The straight wall section allows the inner pot to have a large cross-sectional area at the sidewall, resulting in a larger volume. The constricted section creates a shielding structure on its inner surface, causing water vapor during cooking to condense into liquid upon contact with the constricted section and then flow back into the cooking cavity along the sidewall, thus reducing moisture loss during cooking.

[0016] Furthermore, the bottom wall, side walls, and rim flange are made of aluminum; and / or, the magnetic layer is made of ferritic stainless steel. Using aluminum for the bottom wall, side walls, and rim flange ensures heat conduction during cooking while reducing manufacturing complexity; the magnetic layer heats up quickly under the influence of the magnetic field of the IH heating plate and transfers the heat to the bottom wall, resulting in high cooking efficiency.

[0017] According to another aspect of this utility model, a cooking appliance is provided, including a pot inner liner, wherein the pot inner liner is the aforementioned pot inner liner. The aforementioned pot inner liner effectively solves the problem of low yield rate of pot inner liners used in conjunction with IH heating plates in related technologies, and the cooking appliance having the aforementioned pot inner liner also has the aforementioned advantages. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0019] Figure 1 An exploded structural diagram of an embodiment of the pot inner liner according to the present invention is shown;

[0020] Figure 2It shows Figure 1 A cross-sectional view of the inner pot;

[0021] Figure 3 It shows Figure 2 A magnified view of point A in the inner pot;

[0022] Figure 4 It shows Figure 2 A magnified view of point B on the inner pot;

[0023] Figure 5 A cross-sectional schematic diagram of an embodiment of a cooking appliance according to the present invention is shown.

[0024] The above figures include the following reference numerals:

[0025] 10. Bottom wall; 20. Side wall; 21. Straight wall section; 22. Narrowing section; 30. Mouth flange; 31. Outer extension section; 32. Inner extension section; 40. Magnetic conductive layer; 50. Transition arc wall; 60. Outer shell; 70. Cover assembly. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0027] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0028] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0029] like Figures 1 to 4 As shown, this application provides a pot inner liner. An embodiment of the pot inner liner includes: a bottom wall 10, a side wall 20, an opening flange 30, and a magnetically conductive layer 40. The side wall 20 is connected to the upper end of the bottom wall 10; the opening flange 30 is disposed at the upper end of the side wall 20; the magnetically conductive layer 40 is disposed on the bottom wall 10; wherein, the hardness of the side wall 20 is greater than the hardness of the bottom wall 10.

[0030] In this embodiment, the magnetic layer 40 is disposed on the bottom wall 10 and is used to cooperate with the IH heating plate to generate heat. The heat is transferred to the bottom wall 10 and the side wall 20 to heat the food inside the pot. During the processing of the pot, the flanging of the opening 30 is a relatively late step, and this process can easily cause the already shaped bottom wall 10 and side wall 20 to deform. In this embodiment, because the magnetic layer 40 is pressed onto the bottom wall 10, and the magnetic layer 40 has relatively high hardness, the composite layer structure formed by the bottom wall 10 and the magnetic layer 40 is less prone to deformation. Furthermore, because the side wall 20 has a higher hardness than the bottom wall 10, the side wall 20 itself is also less prone to deformation, thereby improving the yield rate during the pot processing. Therefore, the technical solution of this embodiment can effectively solve the problem of low yield rate of pots used in conjunction with the IH heating plate in related technologies.

[0031] Furthermore, the presence of the magnetically conductive layer 40 and the increased hardness of the sidewall 20 reduce wear and deformation of the pot liner during long-term use, thus improving its service life. Specifically, in this embodiment, the magnetically conductive layer 40 is laminated onto the bottom wall 10 using a press, effectively combining the magnetically conductive layer 40 and the bottom wall 10 to achieve the various benefits of the composite material.

[0032] The magnetic conductive layer 40 can be disposed on the outer surface of the bottom wall 10 or on the inner surface of the bottom wall 10.

[0033] In this embodiment, the bottom wall 10 has a first hardness H1, and the side wall 20 has a second hardness H2. The first hardness H1 and the second hardness H2 satisfy the following condition: 5HB ≤ H2 - H1 ≤ 10HB. By controlling the difference between the second hardness H2 and the first hardness H1 within the above range, while ensuring that the composite layer formed by the bottom wall 10 and the magnetic conductive layer 40 and the side wall 20 are not easily deformed, the process requirements during the hardening process of the side wall 20 are minimized, resulting in lower manufacturing costs for the pot liner. Preferably, H2-H1 can be 5HB, 7.13HB, or 10HB.

[0034] In this embodiment, the sidewall 20 has a second hardness H2, and the flange 30 has a third hardness H3. The second hardness H2 and the third hardness H3 satisfy the condition: 8HB ≤ H2 - H3 ≤ 13HB. Since the pot blank needs to undergo folding, rolling, and turning processes to form the flange 30, the third hardness H3 of the flange 30 is relatively low, making it easier to process. Preferably, H2-H3 can be 8HB, 9.82HB, or 13HB.

[0035] Specifically, the second hardness H2 satisfies: 33HB ≤ H2 ≤ 38HB. By controlling the second hardness H2 within the above range, the sidewall 20 can be guaranteed to have a certain hardness to resist deformation forces during subsequent processing. Preferably, the second hardness H2 can be 33HB, 35HB, 35.99HB, or 38HB.

[0036] Specifically, the third hardness H3 satisfies: 25HB ≤ H3 ≤ 30HB. By controlling the third hardness H3 within the above range, the pot blank used for machining the flange 30 is easier to bend, thus making the machining of the flange 30 easier. Preferably, the third hardness H3 can be 25HB, 26.17HB, 28HB, or 30HB.

[0037] Specifically, the first hardness H1, the second hardness H2, and the third hardness H3 used in the description of the embodiments of this application all refer to the surface hardness of the corresponding structure, and the specific values ​​of the first hardness H1, the second hardness H2, and the third hardness H3 can be obtained by measuring with a hardness tester.

[0038] like Figures 2 to 4As shown, the bottom wall 10, side wall 20, and opening flange 30 are formed from the same sheet material. Part of the same sheet material is stretched and thinned to form the side wall 20, so that the hardness of the side wall 20 is greater than that of the bottom wall 10. By stretching and thinning the same sheet material to form the side wall 20, during the stretching and thinning process, the grains on the surface of the stretched part of the same sheet material will flow and break, forming a smaller and finer grain structure, reducing the gaps between the grains, resulting in a side wall 20 with greater hardness, better corrosion resistance, and a smoother surface.

[0039] In addition to thinning and stretching, the portion of the same sheet used for processing the sidewall 20 can also be thinned and surface hardened through spinning thinning technology.

[0040] In this embodiment, by thinning the sidewall 20 through thinning stretching or spinning technology, the resulting sidewall 20 has greater surface hardness, better corrosion resistance, and a smoother surface. This reduces the need for bulging, shaping, and machining processes during the pot body manufacturing process, thereby improving production efficiency.

[0041] like Figure 2 As shown, the bottom wall 10 has a first thickness T1, and the side wall 20 has a second thickness T2. The first thickness T1 and the second thickness T2 satisfy the following condition: 0.4 ≤ T2 / T1 ≤ 0.8. Since the bottom wall 10 and the side wall 20 are formed from the same sheet, the first thickness T1 of the bottom wall 10 is the original thickness of the same sheet, and the second thickness T2 of the side wall 20 is the thickness of the same sheet after stretching or spinning. T2 / T1 characterizes the thickness change rate of the same sheet used to form the side wall 20. By controlling T2 / T1 within the above-mentioned range, the side wall 20 can be hardened while avoiding damage to the side wall 20 (e.g., causing the side wall 20 to crack). Preferably, T2 / T1 can be 0.4, 0.6, 0.67, or 0.8.

[0042] like Figure 2 As shown, the first thickness T1 satisfies: 2mm ≤ T1 ≤ 5mm. Controlling the first thickness T1 within the above range can balance the deformation resistance of the composite layer formed by the bottom wall 10 and the magnetic conductive layer 40 with the economy of the pot liner processing. Preferably, the first thickness T1 can be 2mm, 3mm or 5mm.

[0043] like Figure 2As shown, the second thickness T2 satisfies: 1mm ≤ T2 ≤ 3mm. Controlling the second thickness T2 within this range allows for the hardening of the sidewall 20 while avoiding damage to the sidewall 20 (e.g., causing cracking). Furthermore, compared to a sidewall that is not stretched and thinned, in the same volume, the sidewall 20 in this embodiment receives relatively less heat from the bottom wall 10 due to its relatively smaller second thickness T2. This allows more heat to be used for heating the food inside the pot, while less heat is dissipated into the external environment, improving heating efficiency and reducing the impact of heat dissipation on the lifespan of electronic components within the cooking appliance. Preferably, the second thickness T2 can be 1mm, 1.5mm, 2mm, or 3mm.

[0044] It should be noted that in this embodiment, a magnetic conductive layer 40 is pressed onto the bottom wall 10. "The bottom wall 10 has a first thickness T1" means that for the area on the bottom wall 10 where the magnetic conductive layer 40 is pressed onto, the first thickness T1 refers to the sum of the thickness of this part of the bottom wall 10 and the magnetic conductive layer 40; for the area on the bottom wall 10 where the magnetic conductive layer 40 is not pressed onto, the first thickness T refers to the thickness of this part of the bottom wall 10.

[0045] Preferably, the thickness of the area on the bottom wall 10 where the magnetic conductive layer 40 is pressed is equal to the thickness of the area on the bottom wall 10 where the magnetic conductive layer 40 is not pressed.

[0046] like Figure 2 and Figure 4 As shown, a transition arc wall 50 is provided between the bottom wall 10 and the side wall 20. The radius R of the transition arc wall 50 satisfies: 12mm ≤ R ≤ 15mm. The transition arc wall 50 serves as a transition section between the bottom wall 10 and the side wall 20, connecting the bottom wall 10 and the side wall 20 and providing a gradual change in thickness. During the stretching and thinning process, the force applied to the side wall 20 by the mold is greater than the force applied to the side wall during the shaping process without thinning. This allows for the processing of a transition arc wall 50 with a smaller radius R at the intersection of the bottom wall 10 and the side wall 20. On the one hand, this results in a smaller overall size of the transition arc wall 50 and a larger size of the side wall 20, increasing the capacity of the pot. On the other hand, it also reduces heat dissipation at the transition arc wall 50, allowing more heat to be used to heat the food inside the pot, thus improving heating efficiency. Preferably, the radius R can be 12mm, 13mm, 14mm, or 15mm.

[0047] like Figure 2 and Figure 3As shown, the flange 30 includes an outer extension 31 and an inner extension 32. The outer extension 31 is connected to the upper end of the side wall 20 and extends outward along the radial direction of the pot. The inner extension 32 is connected to the outer end of the outer extension 31 and extends inward along the radial direction of the pot. The outer extension 31 and the inner extension 32 cooperate to form a folding structure, which increases the thickness of the flange 30 and facilitates the user's handling during use. At the same time, the folding structure also increases the structural strength of the flange 30, making it less prone to deformation.

[0048] like Figure 1 and Figure 2 As shown, the sidewall 20 includes a straight wall section 21 and a constricted section 22 located at the upper end of the straight wall section 21. The cross-sectional area of ​​the constricted section 22 gradually decreases from bottom to top. The straight wall section 21 allows the inner pot to have a large cross-sectional area at the sidewall 20, resulting in a larger volume. The constricted section 22 creates a shielding structure on its inner surface. Water vapor during cooking condenses into liquid upon contact with the constricted section 22 and then flows back into the cooking cavity along the sidewall 20, reducing moisture loss during cooking.

[0049] Specifically, the bottom wall 10, side walls 20, and rim flange 30 are made of aluminum. Aluminum has advantages such as good thermal conductivity, light weight, durability, and ease of processing. Using aluminum to make the bottom wall 10, side walls 20, and rim flange 30 can ensure heat conduction performance during cooking, while reducing the processing difficulty during manufacturing. Preferably, aluminum alloy (e.g., 3003 aluminum alloy) can be used to make the bottom wall 10, side walls 20, and rim flange 30.

[0050] Specifically, the magnetic layer 40 is made of ferritic stainless steel. Ferritic stainless steel has advantages such as good magnetic conductivity, good thermal conductivity, and low thermal expansion coefficient. When subjected to the magnetic field of the IH heating plate, it can quickly heat up and transfer the heat to the bottom wall 10, resulting in high cooking efficiency. Preferably, SUS430 can be used to make the magnetic layer 40.

[0051] like Figure 5 As shown, this application also provides a cooking appliance, an embodiment of which includes a pot inner liner, wherein the pot inner liner is the aforementioned pot inner liner. The aforementioned pot inner liner effectively solves the problem of low yield rate of pot inner liners used in conjunction with IH heating plates in related technologies, and the cooking appliance having the aforementioned pot inner liner also has the aforementioned advantages.

[0052] like Figure 5 As shown, the cooking appliance also includes a housing 60 and a lid assembly 70, with the inner pot disposed inside the housing 60 and the lid assembly 70 being detachably disposed above the housing 60 and the inner pot.

[0053] Specifically, in this embodiment, the cooking appliance is a rice cooker.

[0054] In the description of this utility model, it should be understood that "multiple" means two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0055] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0056] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0057] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. 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 pot inner liner, characterized in that, include: bottom wall(10); Side wall (20), connected to the upper end of the bottom wall (10); A flange (30) is provided at the upper end of the side wall (20); A magnetic conductive layer (40) is disposed on the bottom wall (10); The hardness of the sidewall (20) is greater than that of the bottom wall (10).

2. The inner pot according to claim 1, characterized in that, The bottom wall (10) has a first hardness H1, and the side wall (20) has a second hardness H2. The first hardness H1 and the second hardness H2 satisfy the following condition: 5HB≤H2-H1≤10HB.

3. The inner pot according to claim 1, characterized in that, The sidewall (20) has a second hardness H2, and the opening flange (30) has a third hardness H3. The second hardness H2 and the third hardness H3 satisfy the following condition: 8HB≤H2-H3≤13HB.

4. The inner pot according to claim 3, characterized in that, The second hardness H2 satisfies: 33HB≤H2≤38HB; and / or, The third hardness H3 satisfies: 25HB≤H3≤30HB.

5. The inner pot according to any one of claims 1 to 4, characterized in that, The bottom wall (10), the side wall (20) and the opening flange (30) are formed from the same sheet material. Part of the same sheet material is stretched or spun to form the side wall (20), so that the hardness of the side wall (20) is greater than that of the bottom wall (10).

6. The inner pot according to claim 5, characterized in that, The bottom wall (10) has a first thickness T1, and the side wall (20) has a second thickness T2, wherein the first thickness T1 and the second thickness T2 satisfy the following condition: 0.4 ≤ T2 / T1 ≤ 0.

8.

7. The inner pot according to claim 6, characterized in that, The first thickness T1 satisfies: 2mm ≤ T1 ≤ 5mm; and / or, The second thickness T2 satisfies: 1mm≤T2≤3mm.

8. The inner pot according to claim 5, characterized in that, There is a transition arc wall (50) between the bottom wall (10) and the side wall (20), and the radius R of the transition arc wall (50) satisfies: 12mm≤R≤15mm.

9. The inner pot according to any one of claims 1 to 4, characterized in that, The flange (30) at the mouth includes an outer extension (31) and an inner extension (32). The outer extension (31) is connected to the upper end of the side wall (20) and extends outward along the radial direction of the pot. The inner extension (32) is connected to the outer end of the outer extension (31) and extends inward along the radial direction of the pot.

10. The inner pot according to any one of claims 1 to 4, characterized in that, The sidewall (20) includes a straight wall section (21) and a constricted section (22) disposed at the upper end of the straight wall section (21), wherein the cross-sectional area of ​​the constricted section (22) gradually decreases from bottom to top.

11. The inner pot according to any one of claims 1 to 4, characterized in that, The bottom wall (10), the side wall (20) and the opening flange (30) are made of aluminum; and / or, the magnetic layer (40) is made of ferritic stainless steel.

12. A cooking utensil, comprising a pot inner liner, characterized in that, The inner pot is the inner pot as described in any one of claims 1 to 11.

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