Inner pot and cooking appliance
By setting local functional parts on the inner surface of the pot, a local temperature difference zone is formed, which solves the problem of slow heat convection in the pot, enabling the food to boil and tumble more fully and improving the cooking effect, while reducing the risk of damage to the power board.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG SUPOR ELECTRICAL APPLIANCES MFG CO LTD
- Filing Date
- 2024-12-16
- Publication Date
- 2026-05-29
Smart Images
Figure CN224291709U_ABST
Abstract
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. This results in slow convection flow and insufficient boiling and tumbling of food. To address this issue, functional components with higher magnetic permeability are spaced apart on the substrate. However, existing functional components are typically circular or elliptical in shape, occupying a small area on the substrate. This results in limited heat convection zones and suboptimal cooking performance.
[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] Pot base; and
[0007] A local functional section is disposed on the pot base and includes a plurality of first local functional sections. The plurality of first local functional sections are arranged at intervals along the circumference of the pot body to form local temperature difference regions on the inner surface of the pot body. The width of each first local functional section in the circumferential direction gradually increases from the radial direction outward and / or the height direction upward of the pot body.
[0008] Wherein, two adjacent first local functional parts have a first spacing in the circumferential direction, and the spacing value at the wide end of the first local functional part is less than or equal to the spacing value at the narrow end of the first local functional part.
[0009] According to this solution, multiple first local functional parts, including fan-shaped and similar patterns, can be formed on the inner pot. Compared to other shapes such as rings, circles, and polygons, the first local functional parts of the gradually widening pattern have the structural characteristic of being narrower closer to the bottom center of the inner pot and wider further away from the bottom center, allowing the first local functional parts to cover more area of the inner pot, at least at the bottom. Furthermore, adjacent first local functional parts are close to each other at their wide ends, allowing them to cover more area of the inner pot at those ends. This increases the area ratio of the local functional parts on the inner pot, which is more advantageous in solutions where the local functional parts form high-temperature zones. The local functional parts have a larger area for adjusting the heat distribution of the inner pot, resulting in a larger coverage area of local temperature difference zones. This allows for a large-scale, uneven heating and boiling effect for the food inside the pot, resulting in a larger heat convection area and better heat convection and cooking effects.
[0010] Furthermore, when both the pot base and the local functional parts are made of metal and electromagnetic heating is used, the local functional parts may cause the power board to generate reverse current. Designing the spacing between two adjacent first local functional parts at the wide end to be smaller or equal than that at the narrow end can reduce the reverse current, avoid damage to the power board and other electrical components, and extend the service life of the electrical components.
[0011] Optionally, the spacing value of the first gap gradually decreases or remains constant from the radial outward and / or vertical upward direction of the pot. According to this solution, the spacing between the first local functional parts is designed to be narrower on the outside and wider on the inside or of equal width, and the portion between its wide end and narrow end is increased, which further increases the area ratio of the local functional parts on the pot, and the adjustment area of the local functional parts for the heat distribution of the pot is larger; and the overall layout of the local functional parts is more regular and has a better visual appeal.
[0012] Optionally, the local functional part is a heat-gathering part, a heat-insulating part, a magnetic-gathering part, or a magnetic shielding part. According to this solution, the local functional part can adjust the heat distribution to form the local temperature difference region by changing the heat transfer path or changing the distribution of the magnetic field. The heat-gathering part can concentrate the heat of the pot base, the heat-insulating part can block the heat of the pot base, the magnetic-gathering part can concentrate some of the magnetic lines of force in the magnetic field to generate a large amount of heat, and the magnetic shielding part can prevent magnetic lines of force from passing through to avoid generating heat.
[0013] Optionally, the local functional part is a heat-concentrating part or a magnetic-concentrating part, and the first distance s1 between two adjacent first local functional parts is 5mm to 85mm. Optionally, the local functional part is a heat-insulating part or a magnetic shielding part, and the first local functional part has a second distance s2 between two self-spaced contour edges, the second distance s2 being 5mm to 85mm. According to this solution, the inner surface of the pot can obtain a temperature gradient within the desired temperature range in the local temperature difference region, the liquid and food in the pot tumble more thoroughly, which can meet the cooking requirements and result in better consistency in the cooking effect of the food.
[0014] Optionally, the projection of the radially extending contour edge of the first partial functional part onto the horizontal plane is a straight line, an arc, or a curve. According to this solution, the configuration of the first partial functional part can be designed as needed, wherein a straight edge is simpler and easier to manufacture, while an arc or curved edge has better bonding with the pot base. When the partial functional part forms the inner or outer surface of the pot, the overall appearance is simpler and more aesthetically pleasing, resulting in a better visual effect.
[0015] Optionally, the pot base is a heat conductor, and the local functional part is a heat-concentrating part. The difference ΔW between the thermal conductivity of the heat-concentrating part and the thermal conductivity of the pot base is ΔW ≥ 20 W / (m·K). According to this scheme, the heat-concentrating part has a significantly different thermal conductivity than the pot base. The heat accumulated in the heat-concentrating part can make the temperature gradient in the local temperature difference area more obvious, thus achieving a better heat convection effect.
[0016] Alternatively, the pot base is a magnetic conductor, the local functional part is a magnetic focusing part, and the difference Δμ between the relative permeability of the magnetic focusing part and the relative permeability of the pot base is... r For Δμ r ≥100. According to this scheme, the magnetic conductivity of the magnetically focused part is significantly different from that of the pot substrate. The heat generated by the magnetically focused part can make the temperature gradient in the local temperature difference area more obvious, thus achieving a better heat convection effect.
[0017] Optionally, the pot base has a functional setting area for arranging the local functional parts, wherein the local functional parts are heat-concentrating parts or magnetic-concentrating parts and occupy 40% to 80% of the area of the functional setting area. Alternatively, the local functional parts are heat-insulating parts or magnetic-shielding parts and occupy 10% to 50% of the area of the functional setting area. According to this solution, the area of the heat-concentrating parts or magnetic-concentrating parts is set to be relatively large, while the area of the heat-insulating parts or magnetic-shielding parts is set to be relatively small, so that the heat of the pot body as a whole can meet the cooking requirements while ensuring the overall heating effect and local convection effect.
[0018] Optionally, the partial functional part further includes a circular second partial functional part, which is located at the bottom center of the pot base, and the narrow ends of the plurality of first partial functional parts are all connected to the second partial functional part. According to this solution, the plurality of first partial functional parts can be positioned based on the second partial functional part, making it easier for the partial functional material to be formed on the pot base; and the overall appearance of the product is simpler and more beautiful, with a better visual effect.
[0019] Optionally, the local functional part is formed by an independently molded component. According to this solution, the independently molded component can be combined with the pot base in various ways, such as being at least partially embedded in the pot base or attached to the surface of the pot base, resulting in better bonding strength and making it less likely for the local functional part to detach due to scratches.
[0020] Alternatively, the local functional part can be a functional coating. According to this solution, the coating is easier to bond with the pot substrate, which facilitates the production and manufacturing of the pot liner and reduces manufacturing and material costs. Furthermore, the coating can present a visually appealing color, such as red or green. When the coating is located on the inner or outer side of the pot liner, it can better display the location and shape of the local functional area, making the product more aesthetically pleasing and visually appealing. In addition, the coating can also be a color-changing coating, which changes color with temperature, for example, appearing green at lower temperatures and red at higher temperatures, making it easier for consumers to know the temperature of the pot liner.
[0021] Optionally, the pot base includes a connected bottom and a side portion of the pot base. At least the bottom of the pot base is constructed in an arc or spherical shape. The local functional part is at least located at the bottom of the pot base. The projection of the local functional part onto a horizontal plane has a first maximum diameter D1, and the pot base has a second maximum diameter D2 on the side portion, where D1 / D2 ≥ 40%. According to this solution, when there is no side heating device, the local functional part provides uneven heating from the bottom to a certain height on the side portion of the pot. Food on this side portion can also be fully tumbled, achieving uniform heating. When the local functional part is a magnetic concentrator, a heat concentrator, or a magnetic conductor, the heating area is larger and can reach a portion of the side portion, preventing undercooked food on the side, meeting the minimum standard for undercooked food, and improving cooking results.
[0022] According to another aspect of this application, a cooking appliance is provided, comprising a heating device and a pot as described in any of the above aspects, wherein the heating device is used to heat the pot. According to this solution, when the pot is heated, a significant temperature gradient can be generated on the inner surface of the pot, which has localized functional parts. This temperature gradient 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.
[0023] Optionally, the heating device includes a bottom heating device located at the bottom of the pot and / or a side heating device located on the side of the pot, with the local functional parts of the pot arranged within the projection area of the bottom heating device and / or the side heating device on the pot. According to this solution, the heat zone or magnetic field generated by the bottom heating device and / or the side heating device can completely cover the area with the local functional parts, causing thermal convection to occur in the pot within the area covered by the heat zone or magnetic field, resulting in high heating efficiency and good uneven heating and boiling effect. Attached Figure Description
[0024] 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.
[0025] In the attached image:
[0026] Figure 1 This is a cross-sectional view of a pot inner chamber according to one embodiment of this application;
[0027] Figure 2 for Figure 1 Another cross-sectional view of the inner pot;
[0028] Figure 3 for Figure 1 A bottom view of the inner pot;
[0029] Figure 4 This is a bottom view of a pot according to another embodiment of the present application, in which another example of a partial functional unit is shown;
[0030] Figure 5 for Figure 1 A partial cross-sectional view of an example of a pot liner is shown, wherein the partial functional part is a heat-concentrating part or a magnetic-concentrating part;
[0031] Figure 6 for Figure 1 A partial cross-sectional view of an example of a pot liner is shown, wherein the partial functional part is a heat insulation part or a magnetic shielding part;
[0032] Figure 7 for Figure 1 The diagram shows a partial cross-sectional view of the inner pot, with diameters D1 and D2 shown.
[0033] Figure 8 for Figure 1 The image shows a bottom view of the inner pot, with the function setting area schematically indicated by shaded lines;
[0034] Figure 9 This is a bottom view of the inner pot according to another embodiment of this application.
[0035] Figure 10 for Figure 9 The image shows a three-dimensional view of the pot's inner pot in an inverted state.
[0036] Explanation of reference numerals in the attached figures:
[0037] 1 pot inner pot
[0038] 10 pot base
[0039] 10a pot base bottom
[0040] 10b pot base side
[0041] 10c cavity
[0042] 11 Outer pot base
[0043] 12 Inner Pot Base
[0044] 20 Local functional parts
[0045] 20a Heat-Concentrating Section
[0046] 20b Insulation Section
[0047] 20c magnetic concentrator
[0048] 20d magnetic shielding
[0049] 21 First Local Functional Part
[0050] 22 Second Partial Functional Section
[0051] S1 Function Setting Area
[0052] S2 Non-functional Setting Area Detailed Implementation
[0053] 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.
[0054] 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.
[0055] 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.
[0056] 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."
[0057] 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.
[0058] 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.
[0059] This utility model provides a cooking appliance, which includes a pot and a heating device for heating the pot. The cooking appliance can be, for example, a regular rice cooker, an electric stove equipped with a pot, a pressure cooker, or other electrically heated 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, an IH pressure cooker, or other electromagnetically heated cooking appliances, in which case the pot 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.
[0060] For cooking appliances like rice cookers, the cooking vessel consists of a pot body and a lid. The pot body has a cylindrical inner pot storage compartment. The inner pot can be fixed in the inner pot storage compartment, or it can be freely placed into or removed from the inner pot storage compartment for easy cleaning. The inner pot is usually made of metal and has a circular opening on its upper surface for holding the food 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.
[0061] The lid has a shape that substantially corresponds to the pot body. The lid is cladably mounted on 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, forming a cooking space between them. The lid typically also has a sealing ring, which can be made of, for example, rubber, and is positioned between the lid and the inner pot to seal the cooking space when the lid is closed.
[0062] For cooking appliances such as electric stoves or induction cookers, the inner pot is independent of the electric stove or induction cooker, and the inner pot can be placed on the upper surface of the electric stove or induction cooker during use.
[0063] like Figures 1 to 8 As shown, this application provides a pot liner 1 with better heat convection. The pot liner 1 mainly includes at least one pot base 10 and a local functional part 20. At least one pot base 10 is provided to form a pot base 10 having a cavity 10c. When there is one pot base 10, the local functional part 20 can be located inside or outside the pot base 10; when there are two or more pot bases 10, the local functional part 20 can be located inside, outside, or in the middle of the two or more pot bases 10. The pot liner 1 in the illustrated example includes two pot bases 10, namely an outer pot base 11 and an inner pot base 12, with the local functional part 20 disposed inside or outside the outer pot base 11.
[0064] One example is, such as Figure 1 and Figure 2 As shown, the local functional part 20 can be formed by an independently molded component. In this embodiment, the local functional part 20 can be at least partially embedded in the pot base 10. The illustrated example shows the local functional part 20 fully embedded in the pot base 10. Alternatively, the local functional part 20 can be attached to the surface of the pot base 10 by means such as welding, in which case the local functional part 20 protrudes from the surface. Another alternative example is that the local functional part 20 is a functional coating formed by a functional paint, in which the functional paint is applied to the surface of the pot base 10.
[0065] To improve heat convection within the inner pot 1 during cooking, two adjacent local functional sections 20 (see...) Figure 3 ) or the portion adjacent to a single local functional unit 20 (see Figure 4 The components are arranged at least once in one of the radial, circumferential, and height directions of the pot liner 1 to form localized temperature difference regions on the inner surface of the pot liner 1. The pot base 10 includes a connected pot base bottom 10a and a pot base side 10b. At least the pot base bottom 10a is configured in an arcuate or spherical shape, and the localized functional parts 20 are at least provided at the pot base bottom 10a. Figure 1 and Figure 2 The diagram schematically shows an arc-shaped bottom 10a of the pot base and a partially straight-walled side 10b of the pot base. In one example (not shown), the bottom 10a and side 10b of the pot base form a spherical shape. In another example (not shown), the bottom 10a and side 10b of the pot base form a straight-walled shape.
[0066] When the local functional parts 20 are provided at the bottom of the pot base 10, for a straight-walled pot base bottom 10a, the local functional parts 20 are arranged at least once in the radial and circumferential directions of the pot liner 1; for an arc-shaped / spherical pot base bottom 10a, the local functional parts 20 are arranged at intervals in the circumferential, radial and height directions, or radial, circumferential and height directions of the pot liner 1. When the local functional parts 20 are provided on the side of the pot base 10, for a straight-walled pot base side 10b, the local functional parts 20 are arranged at least once in the circumferential and height directions of the pot liner 1; for an arc-shaped / spherical pot base side 10b, the local functional parts 20 are arranged at intervals in the circumferential, radial and height directions, or radial, circumferential and height directions of the pot liner 1.
[0067] With this arrangement, the inner surface of the pot liner 1 can have a first temperature zone corresponding to the local functional section 20 and a second temperature zone corresponding to a portion of the pot base 10 within the intervals of the local functional section 20. When the pot liner 1 is heated, due to the adjustment of heat distribution by the local functional section 20, there is a significant temperature difference between the first and second temperature zones of the pot liner 1, thereby forming a local temperature difference region between the two regions and generating a significant temperature gradient. Utilizing the temperature gradient, the heat convection inside the pot becomes faster and more intense, 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 local 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 surface.
[0068] See Figure 5 and Figure 6The local functional part 20 can be a heat-concentrating part 20a, a heat-insulating part 20b, a magnetically concentrating part 20c, or a magnetically shielding part 20d. It should be noted that the heat-concentrating part 20a is thermally conductive, and its thermal conductivity is better than that of the pot base 10; the magnetically concentrating part 20c is magnetically conductive, and its magnetic conductivity is better than that of the pot base 10. When the local functional part 20 is either a heat-concentrating part 20a or a heat-insulating part 20b, the local functional part 20 can adjust the heat distribution to form the local temperature difference region by changing the heat transfer path. The heat-concentrating part 20a can concentrate the heat from the pot base 10, and the heat-insulating part 20b can block the heat from the pot base 10. When the local functional part 20 is a magnetic focusing part 20c or a magnetic shielding part 20d, the local functional part 20 can adjust the heat distribution by changing the distribution of the magnetic field to form the local temperature difference region. The magnetic focusing part 20c can concentrate some of the magnetic lines of force in the magnetic field to generate a large amount of heat, and the magnetic shielding part 20d can prevent the magnetic lines of force from passing through to avoid generating heat.
[0069] For a design with two pot bases 10, one example is that both the inner pot base 12 and the outer pot base 11 are heat conductors, and the local functional part 20 is a heat-concentrating part 20a, a heat-insulating part 20b, or a magnetically concentrating part 20c. The local functional part 20 concentrates or blocks heat from the outer pot base 11, or generates heat through electromagnetic heating, resulting in a temperature difference between the local functional part 20 and the pot base 10. Another example is that the inner pot base 12 is a heat conductor, and both the outer pot base 11 are magnetic conductors, with the local functional part 20 being a magnetically concentrating part 20c or a magnetically shielding part 20d. The local functional part 20 generates a large amount of heat by concentrating magnetic lines of force or does not generate heat by shielding magnetic lines of force, resulting in a temperature difference between the local functional part 20 and the pot base 10. When the local functional part 20 is a magnetically shielding part 20d, the local functional part 20 is located on the outside of the pot base 10.
[0070] In the examples described above, where the local functional part 20 is a heat-concentrating part 20a or a magnetic part 20c, the inner surface temperature of the pot liner 1 in the region corresponding to the local functional part 20 is relatively high; more specifically, the first temperature region is a high-temperature region, and the second temperature region is a low-temperature region. In the examples where the local functional part 20 is a heat-insulating part 20b or a magnetic shielding part 20d, the inner surface temperature of the pot liner 1 in the region corresponding to the local functional part 20 is relatively high; more specifically, the first temperature region is a low-temperature region, and the second temperature region is a high-temperature region.
[0071] In some embodiments, the inner pot base 12 is made of a thermally conductive metal material; or a magnetically conductive metal material. Alternatively, the outer pot base 11 is made of a non-metallic material. The inner pot base 12 may be made of a non-stick metal material such as stainless steel to give the inner surface of the pot liner 1 a non-stick function, achieving coating-free non-stick. If needed and / or desired, the inner and / or outer surfaces of the pot base 10 may also be coated, for example, with a protective coating.
[0072] When the local functional part 20 is an independently molded component, its thickness is generally 0.1mm to 5mm, with suitable values such as 0.1mm, 0.5mm, 1mm, 2mm, 3mm, 4mm, and 5mm, preferably 0.5mm. If the thickness of the local functional part 20 is too small, the temperature difference on the inner surface of the pot liner 1 will be too small, preventing strong convection. If the thickness of the local functional part 20 is too large, the overall heat transfer path will be too long, resulting in low thermal efficiency. For example, when the local functional part 20 is a magnetic focusing part 20c, the material of the magnetic focusing part 20c can be a known material such as rare earth materials or amorphous materials. When the local functional part 20 is a magnetic shielding part 20d, the material of the magnetic shielding part 20d can be a known material such as aluminum powder or ceramics. When the local functional part 20 is a heat-gathering part 20a, the material of the heat-gathering part 20a can be a known material such as aluminum, copper, carbon, or graphite. When the local functional part 20 is a heat insulation part 20b, the material of the heat insulation part 20b can be known materials such as PTFE (polytetrafluoroethylene), PFA (polyfluoroalkoxy), or ceramics. When the pot base 10 is a heat conductor, the material of the pot base 10 can be steel, iron, ceramics, glass, etc.
[0073] When the local functional part 20 is a functional coating, the thickness of the local functional part 20 can be 0.1μm to 1mm, for example, suitable values such as 0.1μm, 0.5μm, 1μm, 5μm, 10μm, 50μm, 0.1mm, 0.5mm, 1mm, etc., preferably 0.3mm.
[0074] When the pot base 10 is a magnetic conductor and the local functional part 20 is a magnetic focusing part 20c, the relative permeability of the magnetic focusing part 20c is greater than the relative permeability of the magnetic conductor. To make the temperature gradient in the local temperature difference region more obvious, the difference Δμ between the relative permeability of the magnetic focusing part 20c and the relative permeability of the pot base 10 is increased. r It can be Δμ r ≥100; difference Δμ r For example, suitable values could be 100, 110, 120, 130, 140, 150, 160, 170, 180, or 190. With this setting, a temperature difference of at least 25°C can be formed on the inner surface of the inner pot 1, which is beneficial for the liquid and food inside the pot to boil and tumble more thoroughly.
[0075] When the pot base 10 is a heat conductor and the local functional part 20 is a heat-concentrating part 20a, the difference ΔW between the thermal conductivity of the heat-concentrating part 20a and the thermal conductivity of the pot base 10 can be ΔW ≥ 20 W / (m·K); the difference ΔW can be, for example, a suitable value such as 20 W / (m·K), 30 W / (m·K), 40 W / (m·K), 50 W / (m·K), 60 W / (m·K), 70 W / (m·K), or 90 W / (m·K). With this setting, a temperature difference of, for example, 25°C or more can be formed on the inner surface of the pot liner 1, which is beneficial for the liquid and food in the pot to boil and tumble more thoroughly.
[0076] like Figure 3 and Figure 4 As shown, the local functional unit 20 includes a plurality of first local functional units 21, which are arranged in a circumferential array along the inner surface of the pot 1 to form a local temperature difference region on the inner surface of the pot 1. The shape of the first local functional unit 21 can be circular, elliptical, etc. Figure 3 and Figure 4 The shape of the first local functional part 21 is shown as a fan-shaped or similar pattern. Specifically, the width of each first local functional part 21 in the circumferential direction gradually increases from the radial direction outward and / or the height direction upward to form a gradually widening pattern. Compared with other shapes such as rings, circles, and polygons, the first local functional part 21 with the gradually widening pattern has the structural characteristic 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 first local functional part 21 to cover more area of the pot 1 at least at the bottom, and the first local functional part 21 has a larger adjustment area for the heat distribution of the pot 1, thereby covering a larger area of local temperature difference regions and achieving a large-scale non-uniform heating and boiling effect. Furthermore, when the local functional part 20 forms the inner or outer surface of the pot base 10, 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.
[0077] like Figure 3 As shown, the local functional part 20 also includes a circular second local functional part 22. The second local functional part 22 is located at the center of the bottom of the pot base 10, and the narrow ends of the plurality of first local functional parts 21 are all connected to the second local functional part 22. The plurality of first local functional parts 21 can be positioned based on the second local functional part 22, making it easier for the local functional material to be formed on the pot base 10; and the overall appearance of the product is simpler and more aesthetically pleasing, with a better visual effect. Alternatively, such as Figure 4 As shown, each of the first local functional units 21 is independent.
[0078] To further increase the area ratio of the local functional parts 20, the structure of the local functional parts 20 was designed such that two adjacent first local functional parts 21 have a first spacing s1 in the circumferential direction. The spacing value A1 of the first local functional parts 21 at the wide end is less than or equal to the spacing value A2 at the narrow end. The two adjacent first local functional parts 21 are close to each other at the wide end, so that the first local functional parts 21 can cover more of the pot liner 1 area at the wide end. This increases the area ratio of the local functional parts 20 on the pot liner 1, which is more advantageous in designs where the local functional parts 20 form a high-temperature zone. Furthermore, when both the pot base 10 and the local functional parts 20 are made of metal and electromagnetic heating is used, the local functional parts 20 may cause reverse current to be generated on the power board. Designing the spacing value of the two adjacent first local functional parts 21 at the wide end to be smaller or equal to that at the narrow end can reduce the reverse current, avoid damage to electrical components such as the power board, and extend the service life of these components.
[0079] Optionally, the spacing value of the first spacing s1 gradually decreases or remains constant from the radial direction outward and / or the height direction upward of the pot liner 1. The spacing between the first local functional parts 21 is designed to be narrower on the outside and wider on the inside or of equal width, and the portion between its wide end and narrow end is increased, so that the area ratio of the local functional parts 20 on the pot liner 1 can be further increased, and the adjustment area of the heat distribution of the pot liner 1 by the local functional parts 20 is larger; and the overall layout of the local functional parts 20 is more regular and has a better visual appeal.
[0080] The illustration shows that the projection of the radially extending contour edge of the first local functional part 21 onto the horizontal plane is a straight line. If needed and / or desired, the projection of the radially extending contour edge of the first local functional part 21 onto the horizontal plane can also be an arc or a curve. The configuration of the first local functional part 21 can be designed as needed, where a straight edge is simpler and easier to manufacture, while an arc or curved edge has better integration with the pot base 10. When the local functional part 20 forms the inner or outer surface of the pot liner 1, the overall appearance is simpler and more aesthetically pleasing, resulting in a better visual effect.
[0081] Figure 5The outer pot base 11 is shown to be a heat conductor or a magnetic conductor, the inner pot base 12 is a heat conductor, and the local functional part 20 is a heat-concentrating part 20a or a magnetic concentrating part 20c. When the inner pot 1 is heated, a high-temperature point T1 is generated at the edge of the first local functional part 21. 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, where the high-temperature point T2 corresponds to the position of the high-temperature point T1 in the thickness direction, and the low-temperature point T3 corresponds to the middle of the section of the inner pot base 12. The heat transfer distance between the high-temperature points T1 and T2 is L1, and the heat transfer distance between the high-temperature points T1 and T3 is L2. Thus, T1 > T2 > T3. After a temperature difference is generated on the inner surface of the inner pot, heat flows from the high-temperature area to the low-temperature area, promoting the tumbling and convection of food in the pot, resulting in uniform cooking.
[0082] Using an example pot liner 1 from this application as an example, the relationship between temperature difference and the first gap s1 is shown in Table 1.
[0083]
[0084] Therefore, as the first spacing s1 increases, the temperature difference between the high-temperature point T2 and the low-temperature point T3 also increases. If the first spacing s1 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 first spacing s1 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 decreases as the first spacing s1 increases, the tumbling will also be uneven. Therefore, the first spacing s1 is set to 5mm to 85mm, for example, 5mm, 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 85mm, etc.; preferably 10mm to 60mm.
[0085] When the local functional part 20 is a heat insulation part 20b or a magnetic shielding part 20d, the first local functional part 21 has a second spacing s2 between its two self-spaced contour edges (see Figure 6 In other words, the second spacing s2 is equivalent to the width of the fan-shaped functional part in the circumferential direction. Figure 6 The inner pot base 12 is shown to be a heat conductor, the outer pot base 11 to be a heat conductor or a magnetic conductor, and the local functional part 20 to be a heat insulation part 20b or a magnetic shielding part 20d. The high-temperature point T1 is located at the edge of the groove on the outer pot base 11, the high-temperature point T2 corresponds to the position of the high-temperature point T1 in the thickness direction, and the low-temperature point T3 corresponds to the middle of the section cut off from the inner pot base 12. In this design, T1 > T2 > T3; the spacing s is set to 5mm to 85mm, preferably 10mm to 60mm.
[0086] As described above, at least the bottom 10a of the pot base is constructed in an arc or spherical shape, and the local functional part 20 is at least provided at the bottom 10a of the pot base. Figure 7 As shown, the projection of the local functional part 20 onto the horizontal plane has a first maximum diameter D1, and the pot base 10 has a second maximum diameter D2 on the side 10b of the pot base, where D1 / D2 ≥ 40%. For example, D1 / D2 can be 40%, 50%, 60%, 70%, 80%, 90%, 95%, etc., preferably 88%. Thus, the pot base 10 has a non-uniform heating effect from the bottom to a certain height on the side, allowing the food in this part to tumble fully and achieve uniform heating. When the local functional part 20 is a magnetic concentrating part 20c or a heat concentrating part 20a, a D1 / D2 less than 40% will result in insufficient heating of the food on the side of the inner pot, leading to severely undercooked food that does not meet the minimum standard for undercooked food. A D1 / D2 greater than or equal to 40% results in a larger heating area that reaches part of the side, preventing undercooked food on the side, meeting the minimum standard for undercooked food, and improving the cooking effect. An optimal state is achieved when D1 / D2 is 88%.
[0087] By rationally setting the area proportion of the local functional sections 20, the overall heat of the inner pot 1 can meet the cooking needs while ensuring both overall heating effect and local convection effect. For details, see... Figure 8 The function setting area S1 is bounded by the horizontal reference plane where the highest point of the local function unit 20 is located in the height direction. Figure 8 The approximate location of boundary P is schematically shown using dashed lines. The area below boundary P is the function setting area S1, and the area above boundary P is the non-function setting area S2. When the local functional part 20 is a heat-concentrating part 20a or a magnetic-concentrating part 20c, the area proportion of the local functional part 20 in the function setting area S1 is 40% to 80%, for example, the area proportion can be 40%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, etc., preferably 55%. If the area proportion of the heat-concentrating part 20a or the magnetic-concentrating part 20c is too large, the temperature difference in the gap area will be too small, and the convection effect will be reduced; if the area proportion is too small, the thermal efficiency will be insufficient.
[0088] When the local functional part 20 is a heat insulation part 20b or a magnetic shielding part 20d, the area ratio of the local functional part 20 in the functional setting 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 ratio of the heat insulation part 20b or the magnetic shielding part 20d is too large, the heat transfer will be slow, the thermal efficiency will be low, and the cooking time will be longer. If the area ratio is too small, the temperature difference will be small, and the large-scale tumbling effect will not be achieved.
[0089] Optionally, for cooking appliances such as rice cookers, the function setting area S1 can be defined based on the projection area of the bottom heating device on the inner pot 1, whereby the projection area is the function setting area S1. The bottom heating device can be a coil / heating plate, and the projection area has its outermost boundary as the vertical projection of the outermost contour of the coil / heating plate onto the outer surface of the inner pot 1. The partial function unit 20 can be disposed within the projection area of the bottom heating device on the inner pot 1. The heating device also includes a side heating device located on the side of the inner pot 1, and the partial function unit 20 is arranged within the projection area of the side heating device on the inner pot 1.
[0090] Figure 9 and Figure 10 A pot liner 1 according to another embodiment of this application is shown. The pot liner 1 of this embodiment is similar to... Figures 1 to 8 The difference in the inner pot 1 lies in the setting of the first spacing s1. In this embodiment, the spacing value of the first spacing s1 remains constant from the radial outward and / or vertical upward of the inner pot 1. The spacing between the first local functional parts 21 is designed to be of equal width, and the portion between their wide and narrow ends is increased, thereby further increasing the area ratio of the local functional parts 20 on the inner pot 1, resulting in a larger adjustment area for the heat distribution of the inner pot 1 by the local functional parts 20; and the overall layout of the local functional parts 20 is more regular, resulting in a better visual appearance. The first spacing s1 can be set to 10mm to 60mm.
[0091] 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.
[0092] 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: At least one pot base; and A local functional section is disposed on the at least one pot base and includes a plurality of first local functional sections. The plurality of first local functional sections are arranged at intervals along the circumference of the pot liner to form local temperature difference regions on the inner surface of the pot liner. The width of each first local functional section in the circumferential direction gradually increases from the radial direction outward and / or the height direction upward of the pot liner. Wherein, two adjacent first local functional parts have a first spacing in the circumferential direction, and the spacing value at the wide end of the first local functional part is less than or equal to the spacing value at the narrow end of the first local functional part.
2. The inner pot according to claim 1, characterized in that, The spacing value of the first spacing gradually decreases or remains constant from the radial direction outward and / or the height direction upward of the pot.
3. The inner pot according to claim 1, characterized in that, The local functional parts are heat-gathering parts, heat-insulating parts, magnetic-gathering parts, or magnetic shielding parts.
4. The inner pot according to claim 1, characterized in that, The local functional part is a heat-concentrating part or a magnetic-concentrating part, and the first distance s1 between two adjacent first local functional parts is 5mm to 85mm; or The local functional part is a heat insulation part or a magnetic shielding part. The first local functional part has a second spacing s2 between two contour edges that are spaced apart from itself. The second spacing s2 is 5mm to 85mm.
5. The inner pot according to claim 1, characterized in that, The projection of the radially extending contour edge of the first local functional part onto the horizontal plane is a straight line, an arc, or a curve.
6. The inner pot according to any one of claims 1 to 5, characterized in that, The pot base is a heat conductor, and the local functional part is a heat-concentrating part. The difference ΔW between the thermal conductivity of the heat-concentrating part and the thermal conductivity of the pot base is ΔW ≥ 20 W / (m·K); or The pot base is a magnetic conductor, and the local functional part is a magnetic focusing part. The difference between the relative permeability of the magnetic focusing part and the relative permeability of the pot base is Δμ. r For Δμ r ≥100.
7. The inner pot according to any one of claims 1 to 5, characterized in that, The pot base has a functional setting area for arranging the local functional parts. Wherein, the local functional part is a heat-concentrating part or a magnetic-concentrating part, and its area occupies 40% to 80% of the functional setting area; or The local functional part is a heat insulation part or a magnetic shielding part, and its area accounts for 10% to 50% of the area of the functional setting region.
8. The inner pot according to any one of claims 1 to 5, characterized in that, The partial functional portion further includes a circular second partial functional portion, which is located at the center of the bottom of the pot base, and the narrow ends of the plurality of first partial functional portions are all connected to the second partial functional portion; and / or The local functional part is formed by an independently molded component, or the local functional part is a functional coating.
9. The inner pot according to any one of claims 1 to 5, characterized in that, The pot base includes a connected pot base bottom and a pot base side. At least the pot base bottom is constructed in an arc or spherical shape. The local functional part is at least provided at the bottom of the pot base. The projection of the local functional part on the horizontal plane has a first maximum diameter D1. The pot base has a second maximum diameter D2 on the pot base side, wherein D1 / D2≥40%.
10. A cooking utensil, characterized in that, The cooking appliance includes a heating device and a pot inner liner according to any one of claims 1 to 9, the heating device being used to heat the pot inner liner.
11. The cooking utensil according to claim 10, characterized in that, The heating device includes a bottom heating device located at the bottom of the pot and / or a side heating device located on the side of the pot, with the local functional parts of the pot arranged in the projection area of the bottom heating device and / or the side heating device on the pot.