Pot container and cooking utensil

Abstract

The utility model discloses a pot container and a cooking utensil. The pot container comprises an outer pot base body, an inner pot base body and a functional component. The inner pot base body is located on the inner side of the outer pot base body, and a cavity is formed between the inner pot base body and the side portion of the outer pot base body. The functional component is located on the lower side of the cavity and connected with the outer pot base body and the inner pot base body in a gapless mode at the same time, the functional component comprises at least one functional part, and every two adjacent functional parts or the adjacent part of the single functional part is arranged in a spaced mode in at least one of the radial direction, the circumferential direction and the height direction of the pot container. A local temperature difference area is formed on the inner surface of the pot container. The pot liner has a heat preservation function at the side part due to the action of the cavity, the bottom has a local uneven heating function due to the arrangement of functional components, all structural layers of the pot liner are tightly combined at the bottom, and no cavity is formed in a heating area at the bottom, so that heat concentration and local overheating caused by large thermal resistance at the cavity in the heating area are avoided.

Description

Technical Field

[0001] This application relates to the technical field of kitchen appliances, and more specifically to a pot inner pot and a cooking utensil. Background Technology

[0002] Existing cooking appliances such as regular rice cookers, electric stoves, IH rice cookers, and induction cookers are generally equipped with a heatable inner pot. These inner pots are typically composed of single, double, or multiple layers of substrate, sometimes with a coating on the surface. However, regardless of the substrate or coating, the thickness of each layer is essentially the same throughout the inner pot. This results in a generally uniform thickness of the inner pot, leading to a smooth inner and outer surface and even heat conduction. When the inner pot is heated, the uniform heat transfer and temperature distribution across the inner surface at similar heights result in slow convection currents, limited convection zones, insufficient boiling and tumbling of food, and inconsistent cooking outcomes.

[0003] Therefore, a pot inner liner and cooking utensil are needed to at least partially solve the above problems. Utility Model Content

[0004] The description of this utility model introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This description is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, this utility model provides a pot inner liner for cooking utensils, the pot inner liner comprising:

[0006] Outer pot base;

[0007] The inner pot base is located inside the outer pot base and forms a cavity between the inner pot base and the side of the outer pot base; and

[0008] The functional component is located on the lower side of the cavity and is connected to both the outer pot base and the inner pot base without any gaps. The functional component includes at least one functional part.

[0009] In this arrangement, two adjacent functional parts or adjacent portions of a single functional part are spaced apart in at least one of the radial, circumferential, and height directions of the pot shell to form a local temperature difference region on the inner surface of the pot shell.

[0010] According to this design, the inner surface of the pot can have a first temperature zone corresponding to a functional section and a second temperature zone corresponding to a spacer area of ​​the functional section. When the pot is heated, there is a significant temperature difference between the first and second temperature zones, thus forming a local temperature difference region between the two areas and generating a significant temperature gradient. Utilizing this temperature gradient to create localized uneven heating promotes faster and more intense heat convection within the pot, resulting in more thorough boiling and churning of the liquid and ingredients, more even heating of the ingredients, and better consistency in the cooking process.

[0011] The inner pot of this design features a cavity on its side for insulation, preventing heat loss from the inner pot and ensuring the cooking temperature of the food inside. Furthermore, the bottom of the inner pot incorporates functional components that allow for uneven heating, improving the uniformity of food heating. All structural layers of the inner pot are tightly bonded at the bottom, eliminating cavities in the bottom heating area. This prevents heat concentration and localized overheating caused by high thermal resistance in cavities, ensuring that cooked food does not turn yellow in certain areas and improving overall food quality.

[0012] Optionally, the functional component also includes a component body, which is sandwiched between the outer pot base and the inner pot base and seals the bottom opening of the cavity. According to this solution, the functional component forms an intermediate layer and is used to seal the cavity, which can achieve a better sealing effect on the cavity and ensure better side insulation.

[0013] Optionally, at least one functional part protrudes from the outer surface of the main body of the component in the thickness direction of the pot body, and the outer pot base is provided with a hollow portion corresponding to the at least one functional part, with the at least one functional part filling the hollow portion. According to this solution, the heat of the outer pot base is transferred inward through the main body of the component, and the functional part is embedded in the hollow portion of the outer pot base so as to absorb the heat of the outer pot base and / or absorb the heat from the heating device, thereby forming a temperature-different region on the inner surface of the pot body.

[0014] Optionally, the functional part has a thickness difference in the circumferential direction, so that the outer surface of the functional part forms high and low surfaces in the thickness direction. According to this solution, the high and low surfaces of the functional part can bring a local three-dimensional visual effect, and the external appearance of the product is better. Furthermore, the heat in the high surface area of ​​the functional part is different from that in the low surface area, so that the inner surface of the pot forms a third temperature zone corresponding to the high surface area and a fourth temperature zone corresponding to the low surface area. A small local temperature difference area is formed between these two areas, resulting in a small local uneven temperature distribution on the inner surface of the pot, forming a small local uneven heating, which further promotes faster and more intense heat convection inside the pot.

[0015] Optionally, the high and low surfaces are formed as convex, curved, concave, and / or stepped surfaces. According to this solution, the thickness difference between the convex and concave surfaces and the outer surface of the outer pot substrate gradually changes circumferentially, resulting in a simple external shape that is easy to manufacture; the curved and stepped surfaces are composed of a combination of concave and convex surfaces, which can increase the heat difference between the functional parts in the low and high surface areas, thereby increasing the temperature difference in small local temperature difference areas and intensifying thermal convection.

[0016] The highest and lowest surface areas of the high and low pressure surfaces are located near the two radially extending edges of the functional section. According to this design, the circumferential distance between these two surface areas can be relatively large, which is beneficial for creating a larger temperature difference on the inner surface of the pot.

[0017] Optionally, the thickness difference between the highest point of the high and low elevation surfaces and the outer surface of the outer pot substrate is 0.5–5 mm. The thickness difference between the lowest point of the high and low elevation surfaces and the outer surface of the outer pot substrate is -3–2 mm. According to this design, the temperature difference formed on the inner surface of the pot at the corresponding high and low elevation surfaces can be ensured to be within the desired range, resulting in strong convection. Furthermore, the overall heat transfer path length is moderate, leading to high thermal efficiency. This also avoids the high elevation surface area being too high or the low elevation surface area being too low, which would cause processing difficulties and ensures sufficient material flow during manufacturing to prevent defects.

[0018] Optionally, the perforated portion is constructed as a semi-perforated hole recessed outward from the inner surface of the outer pot base, with the functional parts completely filling the semi-perforated hole. According to this design, the functional parts are hidden when joined to the semi-perforated hole from the inner surface of the outer pot base, and are exposed when joined to the semi-perforated hole from the outer surface of the outer pot base. The outer pot base has a certain structural strength at the semi-perforated hole, which can prevent deformation of the outer pot base.

[0019] Optionally, at least one functional unit includes multiple first functional units, which are arranged at intervals along the circumference of the inner pot. Each of the multiple first functional units is independent, and the outer pot base has multiple independent hollow sections, with each first functional unit filling a corresponding hollow section. According to this solution, the outer pot base can extend to the bottom center of the inner pot. The bottom center of the outer pot base is not hollow and possesses a certain amount of heat when the inner pot is heated, thus supplementing the heat to the bottom center of the inner pot and preventing insufficient heating of the food due to excessively low temperatures in the bottom center.

[0020] Alternatively, at least one functional part may further include a second functional part, which is located at the bottom center of the inner pot and connects multiple first functional parts to form an integral functional part. The outer pot base has a hollowed-out portion, and the integral functional part is filled within the hollowed-out portion. According to this solution, the operation of machining a hollowed-out portion on the outer pot base is relatively simple, and the production and manufacturing of the inner pot is easier.

[0021] Optionally, the functional parts and the main body of the components are integrally formed from the same material, and the functional components are heat conductors. The outer pot base is a magnetic material; thus, the heat generated by the outer pot base is transferred inward through the main body of the components. The heat in the outer pot base between the functional parts is greater than the heat in the functional parts, resulting in a higher temperature of the functional components in the intervals between the functional parts, thus creating a localized temperature difference region. Alternatively, the outer pot base is a heat conductor, and the thermal conductivity of the outer pot base is different from that of the functional components. Therefore, the heat transferred by the outer pot base is different from the heat transferred by the functional components, resulting in a different heat in the outer pot base between the functional parts, and thus a different temperature in the intervals between the functional parts, also creating a localized temperature difference region.

[0022] Optionally, the outer pot base includes an outer pot side and an outer pot bottom, with functional components filling the gap between the outer pot bottom and the outer pot side. The outer pot bottom is an independently formed component and is spaced apart from the outer pot side. According to this solution, the bottom and side of the outer pot base are independently and clearly separated, allowing the outer pot bottom to be manufactured separately to form a structure adapted to the functional parts, such as having a fan-shaped, gradually widening pattern in the perforated portion. Furthermore, the outline of the bottom pattern of the outer pot base is more clearly visible, resulting in a better external appearance of the inner pot.

[0023] Alternatively, the bottom and sides of the outer pot are connected by a connecting part passing through the gap. According to this solution, the bottom and sides of the outer pot base are clearly separated by the gap, allowing functional components to be positioned relative to each other, further defining the radial relative position of the functional components and preventing them from detaching from the outer pot base. Furthermore, the bottom graphic outline of the outer pot base is more clearly visible, resulting in a better external appearance of the inner pot.

[0024] Optionally, the side of the pot liner has a first height H1, and the cavity has a second height H2, wherein H2 / H1 ≥ 30%; and H1 is 50mm to 100mm. According to this design, the height of the cavity is moderate, ensuring that the area ratio of the cavity on the side of the pot liner is sufficient to guarantee good heat preservation on the side of the pot liner. In addition, the above-mentioned range of H1 avoids difficulties in processing the top edge of the pot liner.

[0025] Optionally, the dimension N of the cavity in the thickness direction of the pot liner is 0.5mm ≤ N1 ≤ 5mm. According to this design, the cavity gap is moderate, providing a certain insulation effect and preventing heat loss from the sides; the pot liner thickness is also moderate, resulting in high heat transfer efficiency at the bottom; this avoids increasing the overall size of the pot liner, reducing material costs, and preventing the pot liner from becoming too bulky, making it convenient for users. The cavity can be constructed as a vacuum cavity or an air cavity. According to this design, the heat dissipation thermal resistance on the sides of the pot liner is much greater than the heat transfer thermal resistance at the bottom, giving the pot liner excellent characteristics of good heat transfer and insulation on the sides.

[0026] According to another aspect of this application, a cooking appliance is provided, comprising a heating device and a pot according to any one of the above aspects, wherein the heating device is used to heat the pot. According to this solution, the pot has a heat-insulating function due to the cavity on its side, preventing heat from the inside of the pot from dissipating from its side and ensuring the cooking temperature of the food inside the pot. Furthermore, the pot has a localized uneven heating function due to the functional components installed at the bottom, improving the uniform heating effect of the food. The various structural layers of the pot are tightly bonded at the bottom, and no cavity is formed in the bottom heating area, thereby avoiding heat concentration and localized overheating caused by high thermal resistance in the cavity area of ​​the heating region, ensuring that the cooked food does not turn yellow in certain areas, and improving the cooking quality of the food. Attached Figure Description

[0027] The following drawings, which are incorporated herein by reference as part of this invention, are provided for understanding the invention. The drawings illustrate embodiments of the invention and their descriptions, serving to explain the principles of the invention.

[0028] In the attached image:

[0029] Figure 1 This is a cross-sectional view of the inner pot according to the first embodiment of this application;

[0030] Figure 2 for Figure 1 Another sectional view of the inner pot;

[0031] Figure 3 for Figure 1 A bottom view of the inner pot;

[0032] Figure 4 for Figure 1 Cross-sectional views of the inner and outer pot bases;

[0033] Figure 5 for Figure 1 Bottom view of the inner and outer pot bases;

[0034] Figure 6 for Figure 1 A sectional view of a functional component;

[0035] Figure 7 for Figure 1 Bottom view of the functional components;

[0036] Figure 8 for Figure 1 A partial cross-sectional schematic diagram of the inner pot;

[0037] Figure 9 for Figure 1 The cross-sectional view of the inner pot shown shows diameters D1 and D2, etc.;

[0038] Figure 10 for Figure 9Another bottom view of the inner pot is shown, in which the hollowed-out area is schematically indicated by shading;

[0039] Figure 11 A cross-sectional view of the inner pot according to a first variant example of the first embodiment;

[0040] Figure 12 For those in an inverted state Figure 11 3D view of the inner pot;

[0041] Figure 13 for Figure 11 A sectional view of a functional component;

[0042] Figure 14 for Figure 11 Bottom view of the functional components;

[0043] Figure 15 For those in an inverted state Figure 11 The bottom cross-sectional view of the inner pot shown;

[0044] Figure 16 A perspective view of the inner pot of a second variant example according to the first embodiment;

[0045] Figure 17 For those in an inverted state Figure 16 The bottom cross-sectional view of the inner pot shown;

[0046] Figure 18 A cross-sectional view of the inner pot according to a third variant example of the first embodiment;

[0047] Figure 19 For those in an inverted state Figure 18 The bottom cross-sectional view of the inner pot shown;

[0048] Figure 20 This is a cross-sectional view of the inner pot according to the second embodiment of this application;

[0049] Figure 21 for Figure 20 A bottom view of the inner pot;

[0050] Figure 22 for Figure 20 Cross-sectional views of the inner and outer pot bases;

[0051] Figure 23 for Figure 20 Bottom view of the inner and outer pot bases;

[0052] Figure 24 for Figure 20 A sectional view of a functional component;

[0053] Figure 25 for Figure 20Bottom view of the functional components;

[0054] Figure 26 A cross-sectional view of the inner pot according to the third embodiment of this application;

[0055] Figure 27 for Figure 26 A bottom view of the inner pot;

[0056] Figure 28 for Figure 26 Cross-sectional views of the inner and outer pot bases;

[0057] Figure 29 for Figure 26 Bottom view of the inner and outer pot bases;

[0058] Figure 30 for Figure 26 A sectional view of a functional component;

[0059] Figure 31 for Figure 26 Bottom view of the functional components;

[0060] Figure 32 A cross-sectional view of the inner pot according to the fourth embodiment of this application;

[0061] Figure 33 for Figure 32 A bottom view of the inner pot;

[0062] Figure 34 for Figure 32 Cross-sectional views of the inner and outer pot bases;

[0063] Figure 35 for Figure 32 Bottom view of the inner and outer pot bases;

[0064] Figure 36 for Figure 32 A sectional view of a functional component;

[0065] Figure 37 for Figure 32 A bottom view of the functional components.

[0066] Explanation of reference numerals in the attached figures:

[0067] 1 / 100 / 200 / 300 Pot Inner Chamber 2 Cavities

[0068] 10 Outer pot base 11 Hollowed-out section

[0069] 12 Fully Perforated 12a First Fully Perforated

[0070] 12b Second Full Cutout; 212c Third Full Cutout

[0071] 13 First outer pot section 14 Second outer pot section

[0072] 15. Side of outer pot 16. Bottom of outer pot

[0073] 217 Connecting part 20 Inner pot base

[0074] 30 Functional Components 31 Functional Departments

[0075] 31a First functional unit 31b Second functional unit

[0076] 231c / 331c Third Functional Section 32 Component Main Body

[0077] 33 High and Low Planes 34 High Plane Region

[0078] 35 Low-level surface area 36 Step surface

[0079] 36a First-level step surface; 36b Second-level step surface

[0080] 36c Third-level step surface 37 Curved surface

[0081] 38 concave S1 hollow area

[0082] S2 Non-perforated area G gap Detailed Implementation

[0083] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0084] To fully understand this invention, a detailed description will be provided below. Obviously, the implementation of this invention is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this invention are described in detail below; however, other embodiments may also be possible besides these detailed descriptions.

[0085] 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 the present invention. 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 the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0086] The ordinal numbers such as "first" and "second" used in this invention are merely identifiers and have no other meaning, such as a specific order. Furthermore, for example, the term "first component" does not imply the existence of "second component," and the term "second component" does not imply the existence of "first component."

[0087] It should be noted that the terms “up,” “down,” “front,” “back,” “left,” “right,” “inner,” “outer,” and similar expressions used in this article are for illustrative purposes only and are not intended to be restrictive.

[0088] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the present invention is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art.

[0089] This utility model provides a cooking appliance, which includes a pot body 1 and a heating device for heating the pot body 1. The cooking appliance can be, for example, a regular rice cooker, an electric stove equipped with a pot body 1, a pressure cooker, or other electrically heated electric cooking appliances, in which case the heating device is an electric heating plate or similar device. Alternatively, the cooking appliance can be, for example, an IH rice cooker, an induction cooker equipped with a pot body 1, an IH pressure cooker, or other electromagnetically heated electromagnetic cooking appliances, in which case the pot body 1 includes a magnetically conductive material, and the heating device is an electromagnetic heating coil or similar device. In addition to cooking rice, the cooking appliance can also have various other functions such as cooking porridge.

[0090] For cooking appliances like rice cookers, the appliance includes a pot body and a lid. The pot body has a cylindrical inner pot 1 for storage. The inner pot 1 can be fixedly installed in the inner pot 1 storage section, or it can be freely placed into or removed from the inner pot 1 storage section for easy cleaning. The inner pot 1 is usually made of metal and has a circular opening on its upper surface for holding the material to be heated, such as rice or soup. The pot body includes an electromagnetic heating device, such as an electromagnetic coil, for heating the inner pot 1.

[0091] The lid has a shape that substantially corresponds to the pot body. The lid is closable and hinged onto the pot body; specifically, it is pivotally connected to the pot body via a pivot axis and can freely pivot between a closed and open position relative to the pot body about the pivot axis, facilitating the closing and opening of the pot body. When the lid is closed on the pot body, it covers the inner pot 1, forming a cooking space between them. The lid typically also has a pot rim sealing ring, which can be made of, for example, rubber material, and is positioned between the lid and the inner pot 1 to seal the cooking space when the lid is closed.

[0092] For cooking appliances such as electric stoves or induction cookers, the inner pot 1 is independent of the electric stove or induction cooker. When in use, the inner pot 1 can be placed on the upper surface of the electric stove or induction cooker.

[0093] First Implementation Method

[0094] like Figures 1 to 10 As shown, this application provides a pot liner 1 with better heat convection. The pot liner 1 mainly includes an outer pot base 10, an inner pot base 20, and a functional component 30. The inner pot base 20 is located inside the outer pot base 10. The functional component 30 is located outside the inner pot base 20 and can be connected to both the outer pot base 10 and the inner pot base 20 without gaps. The functional component 30 includes at least one functional part 31. The adjacent portions of two adjacent functional parts 31 (see the second embodiment below) or a single functional part 31 (see this embodiment) are arranged at least one spaced apart in the radial, circumferential, and height directions of the pot liner 1 to form a local temperature difference region on the inner surface of the pot liner 1. Thus, the pot liner 1 has the function of local uneven heating at the bottom due to the presence of the functional component 30, which improves the effect of uniform heating of food.

[0095] Specifically, the inner surface of the pot liner 1 can have a first temperature zone corresponding to the functional section 31 and a second temperature zone corresponding to the interval zone of the functional section 31. When the pot liner 1 is heated, there is a significant temperature difference between the first and second temperature zones, thus creating a local temperature difference region between the two regions and generating a significant temperature gradient. Utilizing the temperature gradient to create localized uneven heating promotes faster and more intense heat convection within the pot, resulting in more thorough boiling and churning of the liquid and ingredients, more even heating of the ingredients, and better consistency in the cooking effect. In addition, when there are localized temperature difference regions at multiple locations on the inner surface of the pot liner 1, the food grains such as rice in contact with the inner surface of the pot liner 1 will undergo stress deformation and viscosity changes due to expansion caused by the temperature difference, giving the inner surface of the pot liner 1 non-stick properties, achieving a non-stick coating.

[0096] To provide side insulation for the inner pot 1, a cavity 2 is formed between the sides of the inner pot base 20 and the outer pot base 10. This cavity 2 blocks heat transfer between the inside and outside of the inner pot 1, preventing heat loss from the inside and ensuring the cooking temperature of the food inside. The functional component 30 is located below the cavity 2. The cavity 2 is not present in the bottom heating area of ​​the inner pot 1. If the inner pot 1 had a cavity 2 in the bottom heating area, the high thermal resistance at that location would cause heat concentration, leading to localized yellowing of food such as rice after cooking. The various structural layers of the inner pot 1 are tightly bonded at the bottom, and no cavity is formed in the bottom heating area. This avoids heat concentration and localized overheating caused by the high thermal resistance at the cavity 2 in the heating area, ensuring that the cooked food does not turn yellow in certain areas and improving the cooking quality.

[0097] The functional component 30 is at least partially embedded in the outer pot base 10. The location where the functional component 30 is embedded in the outer pot base 10 allows for a tighter bond with the outer pot base 10, preventing the functional component 30 from detaching from the outer pot base 10. Figure 4 As shown, the outer pot base 10 is provided with a hollow portion 11 corresponding to at least one functional part 31, such as... Figure 5 and Figure 7 As shown, the cutout portion 11 corresponds in shape and size to at least one functional portion 31, such as... Figure 2 and Figure 3 As shown, at least one functional part 31 can fill the hollow portion 11 and be combined with each surface of the hollow portion 11. The interval area of ​​the functional part 31 is filled by the outer pot base 10. In the illustrated example, the hollow portion 11 is a full-hole 12 that extends through the thickness direction of the inner pot 1, and the functional part 31 is at least partially filled in the full-hole 12. In this solution, the functional part 31 can be exposed from the outer surface of the outer pot base 10, and the user can observe the shape, size and position of the functional part 31, thereby intuitively understanding the functional structure of the inner pot 1; and the exposed functional part 31 can be structurally designed to improve the function and external appearance of the inner pot 1.

[0098] Alternative examples include a semi-perforated portion 11 that is recessed outward from the inner surface of the outer pot base 10, or a semi-perforated portion that is recessed inward from the outer surface of the outer pot base 10. The functional portion 31 is entirely filled within the semi-perforated portion. Alternatively, the functional portion 31 is hidden when it is attached to the semi-perforated portion from the inner surface of the outer pot base 10, and is exposed when it is attached to the semi-perforated portion from the outer surface of the outer pot base 10. The outer pot base 10 has a certain structural strength at the semi-perforated portion, preventing deformation of the outer pot base 10.

[0099] like Figure 6 and Figure 7As shown, the functional component 30 in this embodiment also includes a component body 32, in which a portion of the functional component 30 constitutes at least one functional part 31. The functional component 30 is a concave disc shape. The component body 32 is sandwiched between the inner pot base 20 and the outer pot base 10, but is not embedded in the outer pot base 10. The component body 32 can seal the bottom opening of the cavity 2. The functional component 30 forms an intermediate layer and is used to seal the cavity 2, which can provide a better sealing effect for the cavity 2 and ensure better side insulation. At least one functional part 31 protrudes from the outer surface of the component body 32 in the thickness direction of the pot liner 1 and can be embedded in the hollow portion 11 of the outer pot base 10. The outer pot base 10 is a heat conductor or a magnetic conductor, which generates heat or absorbs heat from the heating device through electromagnetic heating. The functional component 30 is a heat conductor and can absorb heat from the outer pot base 10 and / or absorb heat from the heating device.

[0100] The functional part 31 and the main body 32 are integrally formed from the same material; more specifically, they are two different parts of an independently formed component. The thickness of the functional part 31 is different from the thickness of the main body 32, and the protruding functional part 31 fills the hollow part 11. The thickness of the functional part 31 is greater than the thickness of the main body 32, which makes the heat conduction rate of the functional part 31 lower than that of the main body 32, thereby facilitating the formation of temperature-different zones on the inner surface of the pot liner 1.

[0101] When the outer pot base 10 is a magnetic material, the heat generated by the outer pot base 10 is transferred inward through the component body 32. The heat of the outer pot base 10 between the functional parts 31 is greater than the heat of the functional parts 31. As a result, the temperature of the functional component 30 in the interval area of ​​the functional parts 31 is higher than the temperature of the functional parts 31, so as to form a local temperature difference region. At this time, the first temperature region corresponding to the functional parts 31 is a low temperature region, and the second temperature region corresponding to the interval area is a high temperature region.

[0102] When the outer pot base 10 is a heat conductor, its thermal conductivity differs from that of the functional component 30. When the thermal conductivity of the outer pot base 10 is greater than that of the functional component 30, the heat transferred by the outer pot base 10 is greater than that transferred by the functional component 30. Therefore, the heat in the portion of the outer pot base 10 between the functional parts 31 is greater than that in the functional parts 31, resulting in a higher temperature in the interval region of the functional parts 31 compared to the functional parts 31, thus creating a localized temperature difference region. When the thermal conductivity of the outer pot base 10 is less than that of the functional component 30, the heat transferred by the outer pot base 10 is less than that transferred by the functional component 30. Therefore, the heat in the portion of the outer pot base 10 between the functional parts 31 is less than that in the functional parts 31, resulting in a lower temperature in the region where the functional parts 31 are located compared to the temperature in the interval region, thus creating a localized temperature difference region. In this case, the first temperature region corresponding to the functional part 31 is a high-temperature region, and the second temperature region corresponding to the interval region is a low-temperature region.

[0103] like Figure 1 and Figure 2 As shown, the outer surface of the functional part 31 is flat with the outer surface of the outer pot base 10 at the bottom. In other words, the functional part 31 does not protrude from the outer surface of the outer pot base 10. As a result, the inner pot 1 has a uniform thickness overall or in the middle and bottom area, giving the product a consistent feel and appearance, and improving the user experience.

[0104] Cavity 2 is constructed as either a vacuum cavity or an air cavity. The pot rim needs to be sealed, which can be achieved by crimping or welding. Considering that the expansion of air due to heat can generate pressure and potentially cause safety hazards, the amount of air in cavity 2 should not be excessive. This prevents the pressure from the thermal expansion of air from deforming the inner pot 1, thus avoiding cracking and explosion, and improving the product safety of the inner pot 1. Optionally, the vacuum degree of cavity 2 is 0.001–0.1 Pa. A moderate amount of air in cavity 2 avoids deformation and explosion of the inner pot 1 due to thermal expansion, while also ensuring that the processing of the inner pot 1 is not overly difficult due to vacuum requirements, facilitating its production. If the vacuum degree of cavity 2 is greater than 0.1 Pa, excessive air in cavity 2 will cause deformation and explosion of the inner pot 1 due to thermal expansion. If the vacuum level of cavity 2 is less than 0.001 Pa, although the danger of air expansion is avoided, such a high vacuum level makes the processing of the inner pot 1 too difficult.

[0105] In some embodiments, the outer pot base 10 is made of a thermally conductive metal material; or a magnetically conductive metal material. The inner pot base 20 and the functional component 30 are made of a thermally conductive metal material. Alternatively, the outer pot base 10, the inner pot base 20, and the functional component 30 are made of non-metallic materials. The inner pot base 20 may be made of a non-stick metal material such as stainless steel to give the inner surface of the pot 1 a non-stick function, achieving coating-free non-stick. The outer pot base 10 is used to generate heat or absorb heat from the heating device by electromagnetic heating; and the pot 1 has better heat storage and heat preservation performance. Exemplarily, the inner pot base 20 may be made of stainless steel, titanium, or ceramic. If needed and / or desired, the inner and / or outer surfaces of the pot 1 may also be coated, for example, with a protective coating. One of the outer pot base 10 and the functional component 30 is made of a high thermal conductivity material, and the other is made of a low thermal conductivity material; the high thermal conductivity material is, for example, aluminum, copper, carbon, graphite, etc., and the low thermal conductivity material is, for example, steel, iron, ceramic, glass, etc.

[0106] like Figure 7As shown, the shape of the functional components 30 can be arranged as needed: one example is that the functional components 30 are arranged in a ring, specifically in a ring along the circumference of the pot 1, and in a concentric ring array along the radial direction of the pot 1 and / or in a row along the height direction of the pot 1. Another example is that the functional components 30 are arranged in a spiral shape, specifically spiraling outwards radially from the center of the bottom of the pot 1 and spiraling upwards gradually along the height direction.

[0107] The functional component 30 includes a plurality of first functional parts 31a, which are arranged at intervals or in an array along the circumference of the pot 1. The shape of the first functional parts 31a can be circular, elliptical, etc. The shape of the first functional parts 31a can be fan-shaped or similar. Specifically, the width of each first functional part 31a in the circumferential direction gradually increases from the radial direction outward from the pot 1 to form a gradually widening pattern. Compared with other shapes such as rings, circles, polygons, etc., the functional component 30 with the gradually widening pattern has the structural feature of being narrower closer to the bottom center of the pot 1 and wider further away from the bottom center of the pot 1. This allows the functional component 30 to cover more area of ​​the pot 1, at least at the bottom, and the functional component 30 has a larger adjustment area for the heat distribution of the pot 1. As a result, the coverage area of ​​the local temperature difference area is larger, and a large-scale non-uniform heating and boiling effect can be achieved. Furthermore, when the functional component 30 forms the inner or outer surface of the pot 1, the appearance of the product can be shaped based on the gradually widening pattern, making the overall appearance simpler and more beautiful, and the visual effect better.

[0108] The functional component 30 also includes a circular second functional part 31b. The second functional part 31b is located at the bottom center of the pot liner 1, and the narrow ends of multiple first functional parts 31a are connected to the second functional part 31b to form an integral functional part 31. Multiple first functional parts 31a can be positioned based on the second functional part 31b, making it easier to form local functional materials on the pot liner 1; and the overall appearance of the product is simpler and more beautiful, with a better visual effect.

[0109] To accommodate the functional component 30 in the illustrated example, the hollow portion 11 of the outer pot base 10 is configured to have the same shape as the functional component 30. The outer pot base 10 has a hollow portion 11, and the entire functional component 31 is filled within this hollow portion 11. Specifically, as shown... Figure 5 As shown, the hollowed-out portion 11 includes multiple first full-cut holes 12a and second full-cut holes 12b. The multiple first full-cut holes 12a are arranged at intervals / in an array along the circumference of the pot liner 1, and their circumferential width gradually increases radially outward from the pot liner 1 to form a gradually widening pattern. For example... Figure 3As shown, the first functional part 31a fills the first fully perforated hole 12a, and the second functional part 31b fills the second fully perforated hole 12b. The outer pot base 10 between the first fully perforated holes 12a is called the first outer pot part 13. Further, the outer pot base 10 includes a plurality of first outer pot parts 13, which are arranged circumferentially along the inner pot 1, and the width of each first outer pot part 13 gradually increases radially outward from the inner pot 1 to form a gradually widening pattern. A fully perforated hole 12 is located between two adjacent first outer pot parts 13.

[0110] To create the desired temperature gradient, when the area where functional part 31 is located is a high-temperature zone, there is a spacing s between two adjacent functional components 30 or between adjacent portions of a single functional component 30 (see [link]). Figure 7 When the area where the functional part 31 is located is a low temperature area, the functional part 31 has a spacing s between its two contour edges that are spaced apart. For the illustrated example, the spacing s corresponds to the width of the functional part 31.

[0111] Figure 8 The diagram shows the outer pot base 10 as a magnetic conductor, the inner pot base 20 as a heat conductor, and the functional component 30 as a heat conductor; or the outer pot base 10 as a high heat conductor, the inner pot base 20 as a heat conductor, and the functional component 30 as a low heat conductor. In this case, the area where the functional component 31 is located is a low-temperature zone. When the inner pot 1 is heated, a high-temperature point T1 is generated at the edge of the outer pot base 10. After heat conduction, a high-temperature point T2 and a low-temperature point T3 are generated on the inner surface of the inner pot 1. The high-temperature point T2 corresponds to the high-temperature point T1 in the thickness direction, and the low-temperature point T3 corresponds to the middle of the section of the functional component 31. The heat transfer distance between the high-temperature point T1 and the high-temperature point T2 is L1, and the heat transfer distance between the high-temperature point T1 and the low-temperature point T3 is L2. Therefore, T1 > T2 > T3. After a temperature difference is generated on the inner surface of the inner pot, heat flows from the high-temperature zone to the low-temperature zone, promoting the tumbling and convection of the food in the pot, resulting in even cooking.

[0112] The spacing s is the width of the functional part 31. A test was conducted using an example pot liner 1 from this application, and the relationship between temperature difference and spacing s was obtained, as shown in the table below.

[0113]

[0114] Therefore, as the spacing s increases, the temperature difference between the high-temperature point T2 and the low-temperature point T3 also increases. If the spacing is too small, the temperature difference is too small, the rice's tumbling force is too weak, and the moisture content of the cooked rice is uneven. If the spacing is too large, the temperature difference is too large, the temperature in the low-temperature zone is too low, and the rice is prone to being undercooked in the low-temperature zone. At the same time, because the area of ​​the temperature difference zone is smaller with a larger spacing, the tumbling will also be uneven. Therefore, the spacing s is set to 5mm to 85mm, for example, 5mm, 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 85mm, etc.; preferably 10mm to 60mm.

[0115] In an alternative example, the outer pot base 10 is a low thermal conductivity material, the inner pot base 20 is a thermal conductivity material, and the functional component 30 is a high thermal conductivity material. In this case, the area where the functional part 31 is located is a high-temperature zone. The spacing s is the distance between the functional parts 31, and the spacing s is set to 5mm to 85mm, for example, values ​​such as 5mm, 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 85mm, etc.; preferably 10mm to 60mm.

[0116] When the outer surface of the inner pot 1 transfers heat to its inner surface, the outer thermal resistance is R1, the middle thermal resistance is R2, the inner thermal resistance is R3, and the air thermal resistance is R. 空气 R 空气 >>R2. Thermal resistance R of the bottom heating area outside the functional unit 31 传总 =R1+R2+R3, the thermal resistance R at functional part 31 is equal to R1+R2+R3. 传总 =R2+R3, thermal resistance R of the side of the pot for heat dissipation 散总 =R1+R 空气 +R3, because R 空气 >>R², therefore R 散总 >>R 传总 This results in the pot liner 1 having excellent heat transfer and insulation properties on its side.

[0117] As described above, at least the bottom 3 of the inner pot is constructed in an arc or spherical shape, and the functional component 30 is at least located at the bottom 3 of the inner pot. Figure 9 As shown, the dimension N of cavity 2 in the thickness direction of the pot liner 1 is 0.5mm ≤ N ≤ 5mm. For example, N can be a suitable value such as 0.5mm, 1mm, 2mm, 3mm, 4mm, or 5mm. The moderate gap of cavity 2 can provide a certain heat preservation effect and prevent heat loss from the sides; and the moderate thickness of pot liner 1 results in high heat transfer efficiency at the bottom; it avoids increasing the overall size of pot liner 1, keeping material costs low, and preventing pot liner 1 from being too bulky, making it convenient for users. If the gap is too small, the thermal resistance is low and the heat preservation effect is poor; if the gap is too large, pot liner 1 becomes too thick, the heat transfer efficiency at the bottom is low, the material cost increases, and pot liner 1 becomes too bulky, which is not conducive to user use.

[0118] Cavity 2 is located above the bottom rounded corner and below the constricted edge of the pot. The side of the inner pot 1 has a first height H1, and cavity 2 has a second height H2, wherein H2 / H1 ≥ 30%, for example, H2 / H1 is 30%, 35%, 40%, 45%, 50%, etc.; H1 is 50mm to 100mm, for example, H1 is 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, etc., preferably 60mm. The moderate height of cavity 2 ensures that the area of ​​cavity 2 on the side of the inner pot has a good heat preservation effect, and the above-mentioned range of H1 avoids processing difficulties at the top constricted edge of the inner pot 1.

[0119] The outer pot base 10 has a hollow area S1, see Figure 10 The hollowed-out area S1 is bounded by the horizontal plane where the highest point of the hollowed-out part 11 is located in the height direction, P. Figure 10 The approximate location of boundary P is schematically shown using dashed lines. The area below boundary P is the openwork area S1, and the area above boundary P is the non-openwork area S2. For better sealing of cavity 2, see [reference needed]. Figure 9 and Figure 10 The top of the functional component 30 extends upward beyond the horizontal plane of the top edge of the hollow area S1, and is located below the position of the maximum diameter of the inner pot 1. With this arrangement, a part of the functional component 30 overlaps above the hollow area S1, which can better cover the hollow part 11 and bond with the inner and outer substrates, improve the bonding strength, prevent the composite from falling off, and avoid air intake / leakage.

[0120] The hollowed-out area S1 has a first maximum diameter D1, the functional component 30 has a second maximum diameter D2, and the inner pot 1 has a third maximum diameter D3 on its side 4, where D1 < D2 < D3. The projected dimension L3 of the overlapping part must satisfy L3 = (D2 - D1) / 2, 1mm ≤ L3 ≤ 60mm, preferably 15mm. In the illustrated example, the overlapping part is located on the lower side of the straight wall of the inner pot 1.

[0121] By rationally setting the area ratio of the functional components 30, the overall heat of the pot liner 1 can meet the cooking requirements while ensuring both overall heating effect and local convection effect. Specifically, when the area where the functional part 31 is located is a high-temperature zone, the area ratio of the functional part 31 in the hollow area S1 is 40% to 80%, for example, the area ratio can be 40%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, etc., preferably 55%. If the area ratio of the high-temperature zone is too large, the temperature difference in the gap area will be too small, reducing the convection effect; if the area ratio is too small, the thermal efficiency will be insufficient. When the area where the functional part 31 is located is a low-temperature zone, the area ratio of the functional part 31 in the hollow area S1 is 10% to 50%, for example, the area ratio can be 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, etc., preferably 40%. If the area of ​​the low-temperature zone is too large, the heat transfer will be slower, the thermal efficiency will be low, and the cooking time will be longer. If the area is too small, the temperature difference will be small, and the effect of large-scale tumbling will not be achieved.

[0122] To verify the temperature difference effect, an infrared thermometry test was conducted on the inner pot 1 of this embodiment. The test results showed that the temperature on the inner surface of the inner pot 1 in the area corresponding to the functional components was different from the temperature in the area corresponding to the outer pot base. In one example of the inner pot 1, the temperature at the high-temperature point of the four fan-shaped temperature zones reached over 50°C, the temperature at other locations in the fan-shaped zones reached over 35°C, and the temperature in the area outside the fan-shaped zones was lower, resulting in a temperature difference of, for example, over 25°C on the inner surface of the inner pot 1. It can be seen that the inner pot 1 of this embodiment has more concentrated heat, a larger temperature difference, and more intense heat convection.

[0123] The following section provides three examples of variations of the first implementation method.

[0124] Figures 11 to 15 An example of the first variant is shown. Figure 16 and Figure 17 A second variant example is shown. Figure 18 and Figure 19 A third variation example is shown. These three variations illustrate that the functional part 31 at least partially protrudes outward from the outer surface of the outer pot base 10 at the bottom. The functional part 31 is at least partially recessed into the outer surface of the outer pot base 10 at the bottom. Therefore, the functional part 31 can be designed in various ways; for example, the first functional part 31a may have a three-dimensional structure with a predetermined shape.

[0125] Specifically, the first functional part 31a has a thickness difference in the circumferential direction, so that the outer surface of the first functional part 31a forms high and low surface areas 33 in the thickness direction. It should be noted that the "high" and "low" used in this article when describing the outer surface of the first functional part 31a are based on the thickness direction and are unrelated to the height direction. The high surface area 34 and the low surface area 35 extend in parallel in the radial direction. The high and low surface areas 33 of the first functional part 31a can bring a local three-dimensional visual effect, making the external appearance of the product better. Furthermore, the heat in the high surface area 34 of the first functional part 31a is different from the heat in the low surface area 35, so that the inner surface of the pot liner 1 forms a third temperature zone corresponding to the high surface area 34 and a fourth temperature zone corresponding to the low surface area 35. A small local temperature difference area is formed between these two areas, resulting in a small local uneven temperature distribution on the inner surface of the pot liner 1, forming a small local uneven heating, which further promotes faster and more intense heat convection inside the pot.

[0126] When the outer pot base 10 is a magnetic material and the functional component 30 is a heat conductor, the high and low surfaces 33 of the first functional part 31a can cause different degrees of heat conduction. The low surface region 35 conducts heat faster than the high surface region 34, resulting in more heat being distributed in the low surface region 35 than in the high surface region 34. Consequently, the third temperature zone is a low-temperature zone, and the fourth temperature zone is a high-temperature zone. When the outer pot base 10 and the functional component 30 are heat conductors, the high and low surfaces 33 of the first functional part 31a can also cause uneven heat distribution. The high surface region 34 is closer to the external heat source / heating device than the low surface region 35, resulting in more heat being distributed in the high surface region 34 than in the low surface region 35. Consequently, the third temperature zone is a high-temperature zone, and the fourth temperature zone is a low-temperature zone.

[0127] The highest and lowest surface areas of the high and low surface 33 are respectively located near the two radially extending edges of the first functional part 31a. Therefore, the circumferential distance between these two surface areas can be designed to be relatively large, which is beneficial for creating a larger temperature difference on the inner surface of the pot liner 1. The thickness difference between the highest surface area of ​​the high and low surface 33 and the outer surface of the outer pot base 10 is 0.5 to 5 mm, for example, 0.5 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, etc. The thickness difference between the lowest surface area of ​​the high and low surface 33 and the outer surface of the outer pot base 10 is -3 to 2 mm. For example, the lowest surface area is higher than the outer surface of the outer pot base 10 and the thickness difference between them is 0.5 to 2 mm. The lowest surface area is tangent to the outer surface of the outer pot base 10 or is generally flat, in which case the thickness difference is 0 mm. The lowest surface area is lower than the outer surface of the outer pot base 10 and the thickness difference between them is -3 to 0 mm, excluding 0 mm.

[0128] like Figures 11 to 14As shown, the high and low elevation surfaces 33 are formed as stepped surfaces 36. The functional part 31 protrudes at least partially from the outer surface of the outer pot base 10 at the bottom. The illustration shows a three-level stepped surface 36, which is an arc-shaped surface parallel to the outer surface of the outer pot base 10. The stepped surfaces are, in the thickness direction, first-level stepped surface 36a, second-level stepped surface 36b, and third-level stepped surface 36c, respectively. The first-level stepped surface 36a is the lowest elevation surface region, located near one edge of the first functional part 31a, and the third-level stepped surface 36c is the highest elevation surface region, located near the other edge of the first functional part 31a. A small local temperature difference region is formed between two regions on the inner surface of the pot liner 1 corresponding to two adjacent stepped surfaces 36.

[0129] Optionally, such as Figure 15 As shown, the first-level step surface 36a is tangent to the outer surface of the outer pot base 10, or in other words, it is flat overall. Figure 15 The arc surface of the outer pot base 10 is schematically shown using dashed lines. Alternatively, the first-level step surface 36a protrudes from or is recessed from the outer surface of the outer pot base 10. In the tangential and recessed schemes, the functional part 31 partially protrudes from the outer surface of the outer pot base 10; in the protruding scheme, all of the functional parts 31 protrude from the outer surface of the outer pot base 10.

[0130] like Figure 16 and Figure 17 As shown, the high and low surfaces 33 are formed as curved surfaces 37, or wavy surfaces. The illustration shows the connected high surface region 34 and low surface region 35. The functional part 31 protrudes outward from the outer surface of the outer pot base 10 in the high surface region 34 and is recessed inward from the outer surface of the outer pot base 10 in the low surface region 35. Thus, the functional part 31 is partially protruding outward from and partially recessed in the outer surface of the outer pot base 10. Alternatively, the low surface region 35 protrudes outward from the outer surface of the outer pot base 10, in which case the functional part 31 is entirely protruding outward from the outer surface of the outer pot base 10. Alternatively, the high surface region 34 is recessed inward from the outer surface of the outer pot base 10, in which case the functional part 31 is entirely recessed in the outer surface of the outer pot base 10.

[0131] Figure 18 and Figure 19 As shown, the high and low surfaces 33 are formed as concave surfaces 38. Exemplarily, the thickness difference between the concave surface 38 and the outer surface of the outer pot base 10 gradually changes circumferentially, thereby gradually forming the low surface region 35 from the high surface region 34. The concave surface 38 is recessed within the outer surface of the outer pot base 10, and in this case, all functional parts 31 are recessed within the outer surface of the outer pot base 10. Alternatively, the functional parts 31 may at least partially protrude from the outer surface of the outer pot base 10, so that the concave surface 38 also at least partially protrudes from the outer surface of the outer pot base 10.

[0132] If needed and / or desired, the high and low surfaces 33 can also be formed as convex surfaces. The thickness difference between the convex surface and the outer surface of the outer pot substrate 10 gradually changes in the circumferential direction, thereby gradually forming the high surface region 34 from the low surface region 35.

[0133] Second Implementation Method

[0134] Figures 20 to 25 The pot liner 100 of the second embodiment is shown. Except for the functional part 31 and the hollow part 11, the pot liner 100 of this embodiment is structurally similar to the pot liner 1 of the first embodiment. For the sake of simplicity, the similar parts will not be described again.

[0135] Multiple first functional parts 31a are arranged in a circumferential array along the inner pot 100. The width of each first functional part 31a in the circumferential direction gradually increases from the radial direction of the inner pot 100 to form a gradually widening pattern. Figure 22 and Figure 23 As shown, the outer pot base 10 has multiple independent perforated portions 11. The width of each perforated portion 11 gradually increases outward from the radial direction of the inner pot 100 to form a gradually widening pattern. Correspondingly, as... Figure 24 and Figure 25 As shown, the multiple first functional units 31a are independent of each other and are not connected to each other. Figure 20 and Figure 21 As shown, each first functional part 31a fills the corresponding hollow part 11. The outer pot base 10 includes a plurality of first outer pot parts 13 and second outer pot parts 14. The plurality of first outer pot parts 13 are arranged at intervals along the circumference of the inner pot 100, and the width of each first outer pot part 13 in the circumferential direction gradually increases from the radial direction of the inner pot 100 to form a gradually widening pattern. There is a full hollow hole 12 between two adjacent first outer pot parts 13. The second outer pot part 14 is located at the bottom center of the inner pot 100 and connects the plurality of first outer pot parts 13.

[0136] With this configuration, the outer pot base 10 can extend to the bottom center of the inner pot 100. The bottom center of the outer pot base 10 is not hollow, and it has a certain amount of heat when the inner pot is heated, which can supplement the heat to the bottom center of the inner pot and prevent the temperature in the bottom center of the pot from being too low, resulting in insufficient heating of the food.

[0137] Third Implementation Method

[0138] Figures 26 to 31 The pot liner 200 of the third embodiment is shown. Except for the functional part 31 and the hollow part 11, the pot liner 200 of this embodiment is structurally similar to the pot liner 100 of the second embodiment. For the sake of simplicity, the similar parts will not be described again.

[0139] like Figure 26 and Figure 27As shown, the outer pot base 10 includes an outer pot side portion 15 and an outer pot bottom portion 16, with a gap G between the outer pot bottom portion 16 and the outer pot side portion 15. The functional component 30 fills the gap G between the outer pot bottom portion 16 and the outer pot side portion 15. The outer pot bottom portion 16 and the outer pot side portion 15 are connected by a connecting portion 217 passing through the gap G.

[0140] like Figure 28 and Figure 29 As shown, the hollowed-out portion 11 includes a first full-cut hole 12a and a third full-cut hole 212c connected to the first full-cut hole 12a. The width of the first full-cut hole 12a gradually increases radially outward from the inner pot 1 to form a gradually widening pattern. The third full-cut hole 212c extends circumferentially and its circumferential dimension is greater than the circumferential width of the first full-cut hole 12a. The third full-cut hole 212c is formed as the aforementioned gap G. The connecting portion 217 passes radially through the third full-cut hole 212c. Figure 30 and Figure 31 As shown, in addition to the first functional part 31a, the functional component 30 also has multiple third functional parts 231c that correspond to the positions of the third fully perforated hole 212c and are connected to the first functional part 31a. The third functional parts 231c extend circumferentially and their circumferential dimensions are larger than the circumferential width of the first functional part 31a. The third functional parts 231c fill the gap G, or the third fully perforated hole 212c. The outer pot base 10 includes multiple first outer pot parts 13 and second outer pot parts 14. There is a gap G, or the third fully perforated hole 212c, between the multiple first outer pot parts 13 and the outer pot side part 15. Each first outer pot part 13 is connected to the outer pot side part 15 through a connecting part 217.

[0141] With this configuration, the bottom and sides of the outer pot base 10 are clearly separated by the gap G. The gap G allows the functional component 30 to be positioned relative to the outer pot base 10, further defining the relative position of the functional component 30 in the radial direction and preventing the functional component 30 from detaching from the outer pot base 10. Furthermore, the bottom outline of the outer pot base 10 is more clearly visible; for example, the outer outline of the first outer pot portion 13 can present an independent fan-shaped, gradually widening pattern, thus improving the external appearance of the inner pot.

[0142] Fourth Implementation Method

[0143] Figures 32 to 37 The pot liner 300 of the fourth embodiment is shown. Except for the functional part 31, the hollow part 11 and the outer pot base 10, the pot liner 300 of this embodiment is structurally similar to the pot liner 200 of the third embodiment. For the sake of simplicity, the same parts will not be described again.

[0144] like Figure 34 and Figure 36As shown, the outer pot base 10 has a separate bottom 16 and a separate side 15. Specifically, the outer pot bottom 16 is an independently molded component and is spaced apart from the outer pot side 15. An annular gap G is formed between the outer pot bottom 16 and the outer pot side 15. Figure 36 and Figure 37 As shown, the third functional part 331c of the functional component 30 is a ring shape extending circumferentially, and is connected to multiple first functional parts 31a. Figure 32 and Figure 33 As shown, the third functional part 331c of the functional component 30 fills the annular gap G.

[0145] With this configuration, the bottom and sides of the outer pot base 10 are independently and clearly separated, allowing the bottom 16 of the outer pot to be manufactured separately to form a structure adapted to the functional part 31, such as giving the hollowed-out part 11 a fan-shaped gradually widening pattern. Furthermore, the bottom pattern outline of the outer pot base 10 is more clearly visible; for example, the outer outline of the first outer pot part 13 can present an independent fan-shaped gradually widening pattern, thus improving the external appearance of the inner pot.

[0146] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of the invention. Features described in one embodiment may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0147] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are only for illustrative purposes. This utility model is not limited to the above embodiments. Many variations and modifications can be made based on the teachings of this utility model, and all such variations and modifications fall within the scope of protection claimed by this utility model.

Claims

1. A pot inner liner for use in cooking utensil, characterized in that, The inner pot includes: Outer pot base; An inner pot base, wherein the inner pot base is located inside the outer pot base and forms a cavity between the inner pot base and the side portion of the outer pot base; and A functional component is located on the lower side of the cavity and is seamlessly connected to both the outer pot base and the inner pot base. The functional component includes at least one functional part. Wherein, two adjacent functional parts or adjacent portions of a single functional part are arranged at least one of the radial, circumferential and height directions of the pot body to form a local temperature difference region on the inner surface of the pot body.

2. The liner according to claim 1, characterized in that The functional component also includes a component body, which is sandwiched between the outer pot base and the inner pot base and seals the bottom opening of the cavity.

3. The liner according to claim 2, characterized in that The at least one functional part protrudes from the outer surface of the main body of the component in the thickness direction of the inner pot. The outer pot base is provided with a hollow part corresponding to the at least one functional part. The hollow part is a full hollow or a half hollow. The at least one functional part is filled in the hollow part.

4. The liner according to claim 3, characterized in that The hollowed-out portion is a fully perforated part, and the functional part has a thickness difference in the circumferential direction, so that the outer surface of the functional part forms a high and low surface in the thickness direction.

5. The inner pot according to claim 4, characterized in that, The high and low surfaces are formed as convex surfaces, curved surfaces, concave surfaces, and / or stepped surfaces; and / or The highest and lowest plane regions of the high and low planes are respectively located near the two radially extending edges of the functional part.

6. The inner pot according to claim 4, characterized in that, The thickness difference between the highest surface region of the high and low elevation surfaces and the outer surface of the outer pot base is 0.5–5 mm; and / or The thickness difference between the lowest surface area of ​​the high and low planes and the outer surface of the outer pot substrate is -3 to 2 mm.

7. The canister according to claim 2, wherein The at least one functional unit includes a plurality of first functional units, which are arranged at intervals along the circumference of the pot. The plurality of first functional parts are independent of each other, and the outer pot base is provided with a plurality of independent hollow parts, with each first functional part filling the corresponding hollow part; or The at least one functional part further includes a second functional part, which is located at the bottom center of the inner pot and connects the plurality of first functional parts to form an integral functional part. The outer pot base is provided with a hollow part, and the integral functional part fills the hollow part.

8. The canister according to claim 2, wherein The functional component and the main body of the component are integrally formed from the same material, and the functional component is a heat conductor. Wherein, the outer pot base is a magnetic material; or The outer pot base is a heat conductor, and the thermal conductivity of the outer pot base is different from that of the functional component.

9. The canister according to claim 1, wherein The outer pot base includes an outer pot side and an outer pot bottom, and the functional component fills the gap between the outer pot bottom and the outer pot side. The bottom of the outer pot is an independently formed component and is spaced apart from the side of the outer pot, or the bottom of the outer pot and the side of the outer pot are connected by a connecting part passing through the gap.

10. The inner pot according to any one of claims 1 to 9, characterized in that... The side of the inner pot has a first height H1, and the cavity has a second height H2, wherein H2 / H1 ≥ 30%; and / or H1 is 50mm to 100mm; and / or The cavity has a dimension N in the thickness direction of the inner pot of 0.5mm ≤ N1 ≤ 5mm; and / or The cavity is configured as a vacuum cavity or an air cavity.

11. A cooking appliance characterized by, The cooking appliance includes a heating device and a pot inner liner according to any one of claims 1 to 10, wherein the heating device is used to heat the pot inner liner.

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