Pot container and cooking utensil

Abstract

The utility model discloses a pot liner and a cooking utensil, the pot liner comprises a pot base body and a local functional body, and the pot base body forms a pot body with an accommodating cavity; the local function body is connected to the pot base body from the outer side of the pot base body and comprises at least one first function part and a second function part, and the second function part covers the middle of the bottom of the pot base body and is connected with the at least one first function part. The two adjacent first function parts or the adjacent part of the single first function part is arranged at an interval in at least one of the radial direction, the circumferential direction and the height direction of the pot body, so that a plurality of local temperature difference areas are formed on the inner surface of the pot liner; the second function part is provided with a central through hole, and a part of the pot base body is exposed out of the central through hole so as to make contact with the temperature measuring device. The temperature measuring device avoids a local functional body and directly detects the temperature of the bottom middle part of the pot base body, so that the temperature detected by the temperature measuring device can more accurately reflect the temperature of the inner surface of the pot liner.

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 multi-layer substrates, 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 with even heat conduction. Consequently, this results in slow convection flow within the inner pot, causing insufficient boiling and tumbling of the food. To address this issue, an outer layer with multiple spaced zones is laminated to the substrate to create multiple temperature difference zones on the inner surface of the inner pot. However, when a temperature measuring device measures the temperature of the bottom of the inner pot, the outer layer may show higher or lower heat than the substrate, affecting the accuracy of the temperature measurement.

[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] A pot base, the pot base constituting a pot body having a receiving cavity; and

[0007] A partial functional body is connected to the pot base from the outside of the pot base. The partial functional body includes at least one first functional part and a second functional part. The second functional part covers the middle part of the bottom of the pot base and is connected to the at least one first functional part.

[0008] Wherein, two adjacent first functional parts or adjacent portions of a single first functional part are arranged at least one of the radial, circumferential and height directions of the pot body to form multiple local temperature difference areas on the inner surface of the pot liner; and the second functional part is provided with a central through hole, through which a portion of the pot base is exposed to contact the temperature measuring device.

[0009] According to this solution, the local functional unit can adjust the heat distribution of the inner pot from the outside of the pot base. This allows the local functional unit to receive a larger amount of heat or a smaller amount of heat during cooking compared to the pot base. To avoid the influence of the local functional unit's heat on the accuracy of temperature measurement, the temperature measuring device bypasses the local functional unit and directly detects the temperature of the pot base at the bottom center. This allows the temperature measured by the device to more accurately reflect the temperature of the inner surface of the inner pot. This temperature measurement scheme reduces measurement errors, improves measurement accuracy, and enhances the user's judgment of the food temperature inside the inner pot, thereby effectively improving the cooking results.

[0010] Optionally, the pot base includes a temperature measuring surface exposed from the central through-hole, the temperature measuring surface being higher than the outer bottom surface of the second functional part, and a central recess for receiving the temperature measuring device is formed at the central through-hole. According to this solution, the temperature measuring surface is close to the inner surface of the pot base, allowing the temperature detected by the temperature measuring device to more accurately reflect the temperature of the inner surface of the pot liner; furthermore, the temperature measuring surface is located within the central recess, thus preventing wear on the temperature measuring surface during pot liner handling and ensuring accurate temperature measurement.

[0011] Optionally, the temperature measuring surface is flush with or lower than the outer bottom surface of the pot base. The pot base has an annular heat-insulating recess located between the temperature measuring surface and the wall of the central through hole. According to this design, an air layer exists at the heat-insulating recess, which can prevent heat transfer from the portion of the pot base connected to the edge of the central through hole to the portion of the pot base with the temperature measuring surface, thus better avoiding the influence of heat from local functional areas on temperature measurement accuracy.

[0012] Optionally, the heat-insulating recess has a width L11, which satisfies the following relationship: 1mm ≤ L11 ≤ L, where L is the distance between the temperature measuring device and the wall of the central through hole. According to this solution, the heat-insulating recess provides good heat insulation and prevents gaps between the top surface of the temperature measuring device and the pot base, ensuring that the top surface of the temperature measuring device is fully in contact with the temperature measuring surface, thereby further improving temperature measurement accuracy.

[0013] The heat-insulating recess has a depth L12, which satisfies the following relationship: 1 / 5t ≤ L12 ≤ 2 / 5t, where t is the thickness of the pot base at the outer bottom surface. According to this design, the heat-insulating recess provides excellent heat insulation and prevents the pot body from becoming too thin at the recess, thus ensuring the safety and lifespan of the pot liner and improving product quality and safety.

[0014] Optionally, the temperature measuring surface is higher than the outer bottom surface of the pot base, and the thickness of the pot base at the temperature measuring surface is less than the thickness of the pot base at its outer surface. According to this solution, reducing the thickness of the pot base at the temperature measuring surface brings the temperature measuring surface closer to the inner surface of the pot base. This also reduces heat transfer from the portion of the pot base connected to the edge of the central through-hole to the portion of the pot base with the temperature measuring surface, better avoiding the influence of heat from local functional areas on temperature measurement accuracy. The temperature detected by the temperature measuring device can more accurately reflect the temperature of the inner surface of the pot liner.

[0015] Optionally, there is a thickness difference t1 between the temperature measuring surface and the outer surface of the pot base, and the thickness difference t1 satisfies the following relationship: 1 / 5t ≤ t1 ≤ 4 / 5t, where t is the thickness of the pot base at the outer bottom surface. According to this solution, the pot body is prevented from being too thin at the temperature measuring surface, thus avoiding leaks, ensuring the safety and service life of the pot liner, and improving product quality and safety.

[0016] Optionally, the central through hole has a diameter D, which satisfies the following relationship: D = d + 2L, and 1mm ≤ L ≤ 30mm, where d is the diameter of the temperature measuring device, and L is the distance between the temperature measuring device and the wall of the central through hole. According to this solution, it ensures that the heat from the pot base at the temperature measuring surface meets the cooking requirements, and avoids local functional components from being too close to the temperature measuring device, thus ensuring temperature measurement accuracy.

[0017] The pot base is a heat conductor, and the local functional body is a heat-concentrating body, a heat-insulating body, or a magnetic concentrator. Alternatively, the pot base is a magnetic conductor, and the local functional body is a magnetic concentrator or a magnetic shield. According to this solution, the local functional body can adjust the heat distribution to form the local temperature difference region by changing the heat transfer path or by changing the distribution of the magnetic field. The heat-concentrating body can concentrate the heat of the pot base, the heat-insulating body can block the heat from the heating device, the magnetic concentrator can concentrate some of the magnetic field lines to generate a large amount of heat, and the magnetic shield can prevent magnetic field lines from passing through part of the pot base to avoid generating heat.

[0018] Optionally, the local functional body includes a plurality of first functional parts, which are arranged in a circumferential array along the pot body and are all connected to the second functional parts. The width of each first functional part in the circumferential direction gradually increases from the radial direction outward and / or the height direction upward of the pot body.

[0019] According to this scheme, multiple local functional bodies, including fan-shaped and similar patterns, can be formed on the inner pot. Compared with other shapes such as rings, circles, and polygons, the local functional bodies with gradually widening patterns have the structural characteristics of being narrower closer to the bottom center of the inner pot and wider further away from the bottom center. This allows the local functional bodies to cover more of the inner pot area, at least at the bottom, and provides a larger adjustment area for the heat distribution of the inner pot. Consequently, the coverage area of ​​the local temperature difference zone is larger, achieving a large-scale non-uniform heating and boiling effect.

[0020] Optionally, the partial functional body is embedded into the pot base from its outer surface by pressing. According to this design, the partial functional body can be firmly and reliably embedded into the pot base, making it less prone to falling off. It also facilitates the formation of a central recess when pressure is applied to the portion of the pot base at the central through-hole, thus simplifying manufacturing.

[0021] The outer surface of the pot body and the outer surface of the partial functional unit are generally flat. According to this solution, the partial functional unit is completely embedded in the interior of the pot body, making the structure more robust and reliable. The partial functional unit is not easily detached from the pot body, and the overall appearance of the product is simpler and more aesthetically pleasing, with a better visual effect.

[0022] According to another aspect of this application, a cooking appliance is provided, the cooking appliance including a temperature measuring device and a pot body according to any of the preceding aspects, the temperature measuring device being located below the pot body and contacting a portion of the pot body exposed from the central through-hole.

[0023] According to this solution, by using a central through-hole on a local functional section of the pot inner liner, the temperature measuring device bypasses the local functional section and directly detects the temperature of the pot base at the bottom center. This allows the temperature measured by the device to more accurately reflect the temperature of the inner surface of the pot inner liner. This temperature measurement solution reduces measurement errors, improves measurement accuracy, and enhances the user's judgment of the food temperature inside the pot inner liner, thereby effectively improving the cooking results. 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 A perspective view of a pot in an inverted state according to one embodiment of this application;

[0027] Figure 2 for Figure 1 A bottom view of the inner pot;

[0028] Figure 3 for Figure 1 A three-dimensional diagram of a local functional unit;

[0029] Figure 4 for Figure 1 Cross-sectional view of the inner pot and temperature measuring device;

[0030] Figure 5 for Figure 4 A partial cross-sectional view of the bottom center of the inner pot and the temperature measuring device;

[0031] Figure 6 This is a cross-sectional view of a pot according to another embodiment of this application;

[0032] Figure 7 for Figure 6 A partial cross-sectional view of the bottom center of the inner pot and the temperature measuring device;

[0033] Figure 8 A cross-sectional view of the inner pot according to another embodiment of this application;

[0034] Figure 9 for Figure 8 A partial cross-sectional view of the bottom center of the inner pot and the temperature measuring device.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1 pot inner pot

[0037] 2. Pot body

[0038] 3 Bottom of the pot body

[0039] 4. Side of the pot body

[0040] 5 central recess

[0041] 6 Temperature measuring devices

[0042] 10 pot base

[0043] 11 Temperature measuring surface

[0044] 12 Bottom surface of the pot base

[0045] 13Thermal insulation recess

[0046] 20 Local functional units

[0047] 21 First Functional Department

[0048] 22 Second Functional Department

[0049] 23 Center Through Hole

[0050] 24-hole wall

[0051] 25. Outer bottom surface of the second functional section Detailed Implementation

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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."

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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 a heating element for heating the inner pot, such as an induction coil or heating plate. A temperature measuring device is also installed at the heating element to measure the temperature of the inner pot.

[0060] 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.

[0061] 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.

[0062] like Figures 1 to 5 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 local functional bodies 20. The at least one pot base 10 constitutes a pot body 2 with a receiving cavity. The local functional bodies 20 are connected to the at least one pot base 10 from the outside of the at least one pot base 10. When there is one pot base 10, at least one local functional body 20 is connected to the pot base 10 from the outer surface of the pot base 10; when there are two or more pot bases 10, at least one local functional body 20 is connected to the outermost pot base 10 from the outer surface of the outermost pot base 10. The pot liner 1 of this solution has a multi-layered pot body such as a double-layered pot body or a triple-layered pot body, and the local functional bodies 20 are located on the outside of the pot body 2.

[0063] The local functional element 20 is used to adjust the heat distribution of the inner pot 1. The material of the pot base 10 is different from that of the local functional element 20, resulting in differences between the pot base 10 and the local functional element 20 in, for example, thermal conductivity or magnetic conductivity. The local functional element 20 includes at least one first functional part 21 and a second functional part 22. The second functional part 22 covers the bottom center of the pot base 10 and is connected to at least one first functional part 21. To improve heat convection within the inner pot 1 during cooking, adjacent first functional parts 21 or adjacent portions of a single first functional part 21 are spaced apart in at least one of the radial, circumferential, and height directions of the pot body 2 to form a local temperature difference region on the inner surface of the inner pot 1. The pot body 2 includes a connected pot body bottom 3 and pot body side 4. At least the pot body bottom 3 is configured in an arc or spherical shape, thereby the bottom of the pot base 10 is configured in an arc or spherical shape, and the local functional element 20 is at least provided at the pot body bottom 3. Figure 1 The diagram schematically shows an arc-shaped pot bottom 3 and a partially straight-walled pot side 4. In one example (not shown), the pot bottom 3 and pot side 4 form a spherical shape. In another example (not shown), the pot bottom 3 and pot side 4 form a straight-walled shape.

[0064] When the first functional part 21 is disposed at the bottom of the pot body 2, for a straight-walled pot body bottom 3, the first functional part 21 is arranged at least once in the radial and circumferential directions of the pot body 2; for an arc-shaped / spherical pot body bottom 3, the first functional part 21 is arranged at intervals in the circumferential direction, or in the radial and height directions, or in the radial, circumferential and height directions of the pot body 2.

[0065] When the first functional part 21 is disposed on the side of the pot body 2, for the straight-walled pot body side 4, the first functional part 21 is arranged at least once in the circumferential and height directions of the pot body 2; for the arc-shaped / spherical pot body side 4, the first functional part 21 is arranged at intervals in the circumferential, radial and height directions, or radial, circumferential and height directions of the pot body 2.

[0066] With this arrangement, the inner surface of the pot liner 1 can have a first temperature zone corresponding to the local functional body 20 and a second temperature zone corresponding to the portion of the pot base 10 at the intervals between the local functional bodies 20. When the pot liner 1 is heated, due to the adjustment of heat distribution by the local functional bodies 20, there is a significant temperature difference between the first and second temperature zones of the pot liner 1, thus forming a local temperature difference region between the two regions, which can generate 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 food inside the pot, more uniform heating of the food, 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 coating.

[0067] The local functional body 20 can be a heat-concentrating body, a heat-insulating body, a magnetizing body, or a magnetic shield. When the local functional body 20 is a heat-concentrating body or a heat-insulating body, it can adjust the heat distribution to form a local temperature difference region by changing the heat transfer path. The heat-concentrating body can concentrate the heat of the pot base 10, while the heat-insulating body can block the heat from the pot base 10. When the local functional body 20 is a magnetizing body or a magnetic shield, it can adjust the heat distribution to form a local temperature difference region by changing the magnetic field distribution. The magnetizing body can concentrate some of the magnetic field lines to generate a large amount of heat, while the magnetic shield can prevent magnetic field lines from passing through part of the pot base to avoid generating heat.

[0068] The pot base 10 is a heat conductor and / or a magnetic conductor. When there is only one pot base 10, one example is that the pot base 10 is a magnetic conductor, and the local functional body 20 is a magnetizing body or a magnetic shield. The pot base 10 can generate heat through electromagnetic heating, and the local functional body 20 can generate a large amount of heat or not generate heat, suitable for electromagnetic heating cooking appliances. Another example is that the pot base 10 is a heat conductor, and the local functional body 20 is a heat-concentrating body or a heat-insulating body. The pot base 10 can absorb heat from the heating device, and the local functional body 20 can concentrate heat or block heat, suitable for electric heating cooking appliances. In this other example, alternatively, the local functional body 20 is a magnetizing body to generate a large amount of heat through electromagnetic heating.

[0069] In the above examples, where the local functional body 20 is a heat-concentrating body or a magnetic concentrator, the inner surface temperature of the region corresponding to the local functional body 20 in the pot liner 1 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 body 20 is a heat-insulating body or a magnetic shielding body, the inner surface temperature of the region corresponding to the local functional body 20 in the pot liner 1 is relatively high; more specifically, the first temperature region is a low-temperature region, and the second temperature region is a high-temperature region.

[0070] In some embodiments, the pot base 10 is made of a thermally conductive metal material; or a magnetically conductive metal material. Alternatively, the pot base 10 is made of a non-metallic material. The pot base 10, which forms the inner surface of the pot body 2, can be made of a non-stick metal material to give the inner surface of the inner pot 1 a non-stick function, achieving coating-free non-stick; the pot base 10 is used to generate heat or absorb heat from the heating device by electromagnetic heating; and the inner pot 1 has better heat storage and insulation performance. If needed and / or desired, the inner and / or outer surfaces of the pot body 2 may also be coated, for example, with a protective coating.

[0071] When the local functional body 20 is a magnet, the material of the magnet can be a known material such as rare earth material or amorphous material. When the local functional body 20 is a magnetic shield, the material of the magnetic shield can be a known material such as aluminum powder or ceramic. When the local functional body 20 is a heat collector, the material of the heat collector can be a known material such as aluminum, copper, carbon, or graphite. When the local functional body 20 is a heat insulator, the material of the heat insulator can be a known material such as PTFE (polytetrafluoroethylene), PFA (polyfluoroalkoxy), or ceramic.

[0072] The shape of the local functional elements 20 can be arranged as needed: one example is that the local functional elements 20 are arranged in a ring, specifically in a ring along the circumference of the pot body 2, and in a concentric ring array along the radial direction of the pot body 2 and / or in rows along the height direction of the inner pot 1. Another example is that the local functional elements 20 are arranged in a spiral shape, specifically spiraling outwards radially from the center of the bottom of the pot body 2 and spiraling upwards gradually along the height direction.

[0073] like Figure 2 and Figure 3As shown, the local functional body 20 forms multiple first functional sections 21, which are arranged in a circumferential array along the pot body 2. These multiple first functional sections 21 enable the pot liner 1 to form multiple local temperature difference regions arranged circumferentially. The shape of the first functional section 21 can be circular, elliptical, etc. The illustration shows a fan-shaped or similar shape for the first functional section 21. Specifically, the width of each first functional section 21 in the circumferential direction gradually increases from the radial direction outward and / or the height direction upward of the pot body 2, forming a gradually widening shape. Compared to other shapes such as rings, circles, and polygons, the gradually widening local functional body 20 has a structural characteristic of being narrower closer to the bottom center of the pot liner 1 and wider further away from the bottom center of the pot liner 1. This allows the local functional body 20 to cover more of the pot liner 1 area at least at the bottom, and the local functional body 20 has a larger adjustment area for the heat distribution of the pot liner 1, resulting in a larger coverage area of ​​local temperature difference regions and achieving a large-scale non-uniform heating and boiling effect. Furthermore, when the local functional body 20 forms the inner or outer surface of the pot body 2, the appearance of the product can be shaped based on the gradually widening graphic, making the overall appearance simpler and more beautiful, and the visual effect better.

[0074] The second functional part 22 is annular or circular. The narrow ends of multiple first functional parts 21 are all connected to the second functional part 22. The second functional part 22 connects multiple first functional parts 21 to form an integral component, which facilitates integral assembly into the pot base 10. Multiple first functional parts 21 can be positioned based on the second functional part 22, making it easy for local functional bodies 20 to be formed on the pot body 2; and the overall appearance of the product is simpler and more beautiful, with a better visual effect.

[0075] The local functional body 20 can adjust the heat distribution of the inner pot from the outside of the pot base 10, so that compared with the pot base 10, the local functional body 20 can obtain a large amount of heat or have a small amount of heat during cooking. To avoid the influence of the heat of the local functional body 20 on the accuracy of temperature measurement, see [reference needed]. Figure 3 and Figure 4 The second functional unit 22 has a central through-hole 23, through which a portion of the pot base 10 can be exposed to contact the temperature measuring device 6. The attached figure schematically shows the temperature measuring device 6 with a box. The pot base 10 includes a temperature measuring surface 11 exposed through the central through-hole 23, through which the temperature measuring device 6 contacts to measure the temperature of the pot base 10. By bypassing the partial functional unit 20, the temperature measuring device 6 directly detects the temperature at the bottom center of the pot base 10, allowing the temperature detected by the temperature measuring device 6 to more accurately reflect the temperature of the inner surface of the pot. This temperature measurement scheme reduces measurement errors, improves measurement accuracy, and enhances the user's judgment of the food temperature inside the pot, thereby effectively improving the cooking effect.

[0076] like Figure 5As shown, to better avoid the influence of heat from the local functional body 20 on the temperature measuring device 6, the central through hole 23 has a diameter D, which satisfies the following relationship: D = d + 2L, and 1mm ≤ L ≤ 30mm, where d is the diameter of the temperature measuring device 6, and L is the distance between the temperature measuring device 6 and the hole wall 24 of the central through hole 23. The design value of D can be obtained based on the above two relationships. During manufacturing, the range of d and D is determined to ensure that the distance L is within the above range. The distance L can be a suitable value such as 1mm, 2mm, 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, etc. The distance L is preferably 5mm to 10mm. Due to the existence of the distance L, it is ensured that the heat of the pot base 10 at the temperature measuring surface 11 meets the cooking requirements, and the heat of the local functional body 20 is prevented from affecting the temperature measurement due to being too close to the temperature measuring device 6, thus ensuring the accuracy of temperature measurement. If the spacing L is too large, the heating area in the middle of the bottom of the pot will be insufficient, resulting in insufficient heat and thus insufficient inner surface temperature in the middle of the bottom of the pot; if the spacing L is too small, the heat from the local functional body 20 will affect the temperature measuring device 6, resulting in inaccurate temperature measurement.

[0077] The temperature measuring surface 11 is higher than the outer bottom surface 25 of the second functional part 22, or in other words, the temperature measuring surface 11 is located inside the outer bottom surface 25 of the second functional part 22. A thickness difference is formed between the temperature measuring surface 11 and the outer bottom surface 25 of the second functional part 22, resulting in a central recess 5 at the central through-hole 23 for receiving the temperature measuring device 6. The temperature measuring device 6 can extend into the central recess 5 to directly measure the temperature of the bottom of the pot base 10. Since the temperature measuring surface 11 is relatively close to the inner surface of the pot base 10, the temperature detected by the temperature measuring device 6 can more accurately reflect the temperature of the inner surface of the pot. Furthermore, since the temperature measuring surface 11 is within the central recess 5, wear on the temperature measuring surface 11 during pot removal and placement can be prevented, thus avoiding impact on temperature measurement accuracy. In the illustrated example, the temperature measuring surface 11 is flush with the outer bottom surface 12 of the pot base 10. If needed and / or desired, the temperature measuring surface 11 can be flush with the outer bottom surface 25 of the second functional part 22.

[0078] Figure 6 and Figure 7 A pot liner according to another embodiment of this application is shown. For example... Figure 6 and Figure 7As shown, the temperature measuring surface 11 is flush with or slightly lower than the outer bottom surface 12 of the pot base 10. Since the heat at the point where the pot base 10 connects to the local functional body 20 affects the temperature measuring accuracy, especially when the local functional body 20 is a magnet or a heat-concentrating body, the heat of the local functional body 20 is relatively high, resulting in relatively high heat in the portion of the pot base 10 connected to the local functional body 20. To improve temperature measuring accuracy, the pot base 10 is provided with an annular heat-insulating recess 13, located between the temperature measuring surface 11 and the hole wall 24 of the central through hole 23. An air layer exists at the heat-insulating recess 13, which can block heat transfer from the portion of the pot base 10 connected to the edge of the central through hole 23 to the portion of the pot base 10 with the temperature measuring surface 11, thus better avoiding the influence of heat at the local functional body 20 on the temperature measuring accuracy.

[0079] The heat-insulating recess 13 has a width L11, which satisfies the following relationship: 1mm ≤ L11 ≤ L, where L is the distance between the temperature measuring device 6 and the wall 24 of the central through hole 23. As mentioned above, 1mm ≤ L ≤ 30mm, so the width L11 can be a suitable value such as 1mm, 2mm, 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, etc. Therefore, the heat-insulating recess 13 can provide good heat insulation and prevent a gap from forming between the top surface of the temperature measuring device 6 and the pot base 10, ensuring that the top surface of the temperature measuring device 6 is fully in contact with the temperature measuring surface 11, thereby further improving the temperature measurement accuracy. If the width L11 is too small, it will not provide heat insulation; if the width L11 exceeds the range of the distance L, a gap will form between the top surface of the temperature measuring device 6 and the pot base 10, affecting the temperature measurement accuracy.

[0080] The heat-insulating recess 13 has a depth L12, which satisfies the following relationship: 1 / 5t ≤ L12 ≤ 2 / 5t, where t is the thickness of the pot base 10 at its outer bottom surface. The heat-insulating recess 13 provides good heat insulation and prevents the pot body 2 from becoming too thin at the heat-insulating recess 13, thus ensuring the safety and lifespan of the pot liner and improving product quality and safety. If the depth L12 is too large, the pot body 2 will become too thin at the heat-insulating recess 13, making it prone to leaks during use; if the depth L12 is too small, the heat insulation effect will be poor.

[0081] Figure 8 and Figure 9 A pot liner according to another embodiment of this application is shown. For example... Figure 8 and Figure 9As shown, the temperature measuring surface 11 is higher than the outer bottom surface 12 of the pot base 10, or in other words, the temperature measuring surface 11 is located inside the outer bottom surface 12 of the pot base 10. The temperature measuring surface 11 and the outer bottom surface 12 of the pot base 10 form a thickness difference, making the thickness of the pot base 10 at the temperature measuring surface 11 less than its thickness at its outer surface. Reducing the thickness of the pot base 10 at the temperature measuring surface 11 brings the temperature measuring surface 11 closer to the inner surface of the pot base 10, and reduces heat transfer from the portion of the pot base 10 connected to the edge of the central through-hole to the portion of the pot base 10 with the temperature measuring surface 11. This better avoids the influence of heat from the local functional body 20 on the temperature measuring accuracy, and the temperature detected by the temperature measuring device 6 can more accurately reflect the temperature of the inner surface of the pot liner.

[0082] There is a thickness difference t1 between the temperature measuring surface 11 and the outer surface of the pot base 10. The thickness difference t1 satisfies the following relationship: 1 / 5t ≤ t1 ≤ 4 / 5t, where t is the thickness of the pot base 10 at its outer bottom surface. This prevents the pot body 2 from becoming too thin at the heat insulation recess 13, thus ensuring the safety and service life of the pot liner and improving product quality and safety. If the thickness difference t1 is too large, the pot body 2 will be too thin at the temperature measuring surface 11, making it prone to leaks during use. If the thickness difference t1 is too small, the effect of reducing heat transfer will be poor.

[0083] The partial functional element 20 is embedded into the pot base 10 from its outer surface by pressing. The partial functional element 20 is firmly and reliably embedded in the pot base 10, making it difficult to detach. It also facilitates the formation of a central recess when pressure is applied to the portion of the pot base 10 at the central through-hole, simplifying manufacturing. Before lamination, the partial functional element 20 is a flat plate. Applying force to the lower surface of the partial functional element 20 and the portion of the pot base 10 corresponding to the central through-hole causes deformation of the partial functional element 20 during the compression process, ultimately embedding it into the pot base 10. The outer surface of the pot body 2 and the outer surface of the partial functional element 20 are generally flat. The partial functional element 20 is completely embedded inside the pot body 2, resulting in a more robust and reliable structure. It is less likely to detach from the pot body 2, and the overall appearance of the product is simpler and more aesthetically pleasing, with a better visual effect.

[0084] 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.

[0085] 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 canister for use in a cooking appliance, characterized in that, The inner pot comprises: a pot base body constituting a pot body with a receiving cavity; and a local functional body connected to the pot base body from the outside of the pot base body, the local functional body comprising at least one first functional part and a second functional part covering the bottom middle part of the pot base body and connected to the at least one first functional part, wherein two adjacent first functional parts or parts adjacent to each other of a single first functional part are arranged at intervals in at least one of the radial, circumferential and height directions of the pot body to form multiple local temperature difference areas on the inner surface of the inner pot; and the second functional part is provided with a central through hole, and a part of the pot base body is exposed from the central through hole to contact a temperature measuring device.

2. The liner according to claim 1, characterized in that, The pot base body comprises a temperature measuring surface exposed from the central through hole, the temperature measuring surface being higher than the outer bottom surface of the second functional part, and a central recess for receiving the temperature measuring device is formed at the central through hole.

3. The liner according to claim 2, characterized in that The temperature measuring surface is flush with or lower than the outer bottom surface of the pot base body, and the pot base body is provided with an annular heat insulation recess between the temperature measuring surface and the hole wall of the central through hole.

4. The inner pot according to claim 3, wherein the heat insulation recess has a width L11 satisfying the following relationship: 1mm≤L11≤L, where L is the distance between the temperature measuring device and the hole wall of the central through hole; and / or the heat insulation recess has a depth L12 satisfying the following relationship: 1 / 5t≤L12≤2 / 5t, where t is the thickness of the pot base body at the outer bottom surface.

5. The canister according to claim 2, wherein The temperature measuring surface is higher than the outer bottom surface of the pot base body, and the thickness of the pot base body at the temperature measuring surface is smaller than the thickness of the pot base body at the outer bottom surface.

6. The canister according to claim 5, wherein The temperature measuring surface and the outer bottom surface of the pot base body have a thickness difference t1 satisfying the following relationship: 1 / 5t≤t1≤4 / 5t, where t is the thickness of the pot base body at the outer bottom surface.

7. The canister according to claim 1, wherein The central through hole has a diameter D satisfying the following relationship: D=d+2L, and 1mm≤L≤30mm, where d is the diameter of the temperature measuring device, and L is the distance between the temperature measuring device and the hole wall of the central through hole.

8. The inner pot according to any one of claims 1 to 7, wherein the pot base body is a heat conductor, and the local functional body is a heat concentrator, a heat insulator or a magnetic concentrator; or the pot base body is a magnetic conductor, and the local functional body is a magnetic concentrator or a magnetic shield.

9. The canister according to any one of claims 1 to 7, characterized in that The local functional body comprises a plurality of first functional parts arranged in an array along the circumferential direction of the pot body and connected to the second functional part, and the width of each first functional part in the circumferential direction gradually increases from the radial direction outward and / or the height direction upward.

10. The inner pot according to any one of claims 1 to 7, wherein the local functional body is embedded in the pot base body from the outer surface of the pot base body by press fitting; and / or the outer surface of the pot body and the outer surface of the local functional body are flat as a whole.

11. A cooking appliance characterized by, The cooking utensil comprises a temperature measuring device and the inner pot according to any one of claims 1 to 10, the temperature measuring device is located at the lower side of the inner pot and contacts the part of the pot base exposed from the central through hole.

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