Heat retaining cover and cooking appliance

Abstract

The utility model provides a kind of heat preservation cover and cooking utensil.The heat preservation cover includes the cover bottom and cover body connected.The annular reinforcing portion is formed around the circumferential direction of cover bottom, and the top surface of annular reinforcing portion is inwardly recessed to form annular groove.The water collecting platform is formed on the radial inner side of annular reinforcing portion, and the water collecting platform is communicated with annular groove, and the bottom of water collecting platform is provided with water leakage hole.The annular groove and water collecting platform realize the orderly collection and directional discharge of condensate water.Meanwhile, the structure integrity and mechanical strength of annular reinforcing portion are maintained by the setting of water collecting platform, and the reliability and service life of heat preservation cover are improved.

Description

Technical Field

[0001] This utility model relates to the field of cooking utensil technology, and more specifically to a heat preservation cover and a cooking utensil. Background Technology

[0002] The inner pot of most existing cooking utensils can be removed. An unavoidable gap exists between the inner pot and the main body of the pot. To prevent water accumulation in the main body, a drain hole is provided in the insulation cover. However, the placement of the drain hole affects the strength of the insulation cover and thus the reliability of the product.

[0003] Therefore, there is a need to provide a heat insulation cover and cooking appliance to at least partially solve the above problems. Utility Model Content

[0004] The utility model description section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description section 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, the first aspect of this utility model provides a heat insulation cover, the heat insulation cover including a connected cover bottom and a cover body; The bottom of the cover has an annular reinforcing part that surrounds its circumference, and the top surface of the annular reinforcing part is recessed inward to form an annular groove; The bottom of the cover has a water collection platform formed on the radial inner side of the annular reinforcement. The water collection platform is connected to the annular groove, and a water leakage hole is provided through the bottom of the water collection platform.

[0006] According to the first aspect of this utility model, the heat insulation cover achieves orderly collection and directional discharge of condensate through the annular groove and the water collection platform. Simultaneously, the water collection platform maintains the structural integrity and mechanical strength of the annular reinforcing section, thereby improving the reliability and service life of the heat insulation cover.

[0007] Optionally, the insulation cover is integrally molded.

[0008] According to this plan, the process of forming a thermal insulation cover in one day is simple.

[0009] Optionally, the annular groove extends continuously along the circumference of the bottom of the cover.

[0010] According to this solution, the annular groove can collect condensate dripping from different positions on the inner wall of the insulation cover from all directions, and the annular groove has better mechanical strength and stability and is not easily deformed.

[0011] Optionally, multiple water collection platforms are arranged at circumferential intervals along the annular groove.

[0012] According to this scheme, when the condensate volume is large, multiple water collection platforms can work simultaneously to achieve diversion, thereby improving drainage efficiency and increasing capacity.

[0013] Optionally, multiple water collection platforms are arranged symmetrically.

[0014] According to this plan, the insulation cover will be kept under balanced stress, making it more stable when placed.

[0015] Optionally, the bottom of the cover is provided with mounting holes; wherein, The mounting hole is offset from the water collection platform along the circumferential direction of the bottom of the cover; and / or the mounting hole is offset from the annular groove along the radial direction of the bottom of the cover.

[0016] According to this plan, the impact of condensation on electrical components can be avoided.

[0017] Optionally, the outer wall surface of the cover bottom is provided with a downwardly protruding support portion.

[0018] According to this plan, it is used to support the entire insulation cover.

[0019] Optionally, the support portion corresponds to the annular groove.

[0020] According to this scheme, space optimization and structural lightweighting are achieved, and the drainage structure is transformed into a load-bearing unit, thereby enhancing the structural strength.

[0021] Optionally, the annular groove and the water collection platform together form the lowest area on the bottom of the cover.

[0022] According to this solution, gravity is used to actively guide all the condensate on the bottom of the cover to flow into the drainage structure, thereby improving drainage efficiency.

[0023] Optionally, the inner wall surface of the bottom of the water collection platform slopes outward and upward from the drain hole.

[0024] According to this plan, by tilting the water collection platform, a guide surface is formed, which facilitates the collection of water to the leakage hole.

[0025] Optionally, the inclination angle of the inner wall surface at the bottom of the water collection platform is 5° to 9°.

[0026] This plan ensures a balance between efficient airflow and space utilization.

[0027] Optionally, the inner wall surface of the cover bottom slopes outward and downward from the center.

[0028] According to this scheme, by tilting the bottom of the cover, the condensate can be actively guided to the annular groove.

[0029] Optionally, the inclination angle of the inner wall surface of the cover bottom is 3° to 7°.

[0030] This plan ensures a balance between efficient airflow and space utilization.

[0031] Optionally, the cover includes: The first straight wall portion is connected to the top of the bottom of the cover; The corner portion, connected to the top of the first straight wall portion, at least part of the corner portion is recessed from top to bottom toward the central axis of the insulation cover; The second straight wall portion is connected to the top of the corner portion, and the top of the second straight wall portion forms the opening of the heat insulation cover; Wherein, the radius of the first straight wall portion is greater than the radius of the second straight wall portion, and the difference between the radius of the first straight wall portion and the radius of the second straight wall portion is 11cm~15cm.

[0032] According to this scheme, geometric space is provided for designing a gentle large radius corner, so that the condensate flows smoothly.

[0033] Optionally, the corner portion is recessed from top to bottom toward the central axis of the heat insulation cover. The corner portion includes an arc-shaped wall and a platform wall. The arc-shaped wall is located at the upper end of the platform wall. In the axial section of the heat insulation cover, the arc-shaped wall is an arc, and the platform wall is a straight line tangent to the arc.

[0034] According to this scheme, an ideal flow path is formed, allowing water droplets to move inward and downward in an orderly manner.

[0035] Optionally, the arc-shaped wall smoothly transitions to the first straight wall portion, or the arc-shaped wall and the first straight wall portion are smoothly connected by a first transition wall; and / or The platform wall is inclined to the second straight wall portion, and the platform wall and the second straight wall portion are smoothly transitioned through a second transition wall.

[0036] According to this plan, the continuity of the condensate flow path is ensured.

[0037] Optionally, the periphery of the opening of the heat insulation cover is provided with a plurality of limiting clips arranged at intervals along its circumference; The limiting edge includes a straight edge and a bent edge.

[0038] This solution can be adapted to different installation structures.

[0039] Optionally, a second aspect of the present invention provides a cooking appliance, including a pot body assembly and a lid covering the pot body assembly, wherein the pot body assembly includes an outer shell, a heat-insulating cover and a pot inner connected sequentially from the outside to the inside; The heat insulation cover is the heat insulation cover described above.

[0040] According to the second aspect of this utility model, the cooking appliance reduces heat loss by setting up a heat-insulating cover. Attached Figure Description

[0041] The following drawings, which illustrate embodiments of the present invention, are incorporated herein as part of the present invention for understanding the invention. The drawings show embodiments of the present invention and their descriptions, serving to explain the principles of the present invention. In the drawings, Figure 1 This is a three-dimensional schematic diagram of a preferred embodiment of the heat insulation cover of the present utility model; Figure 2 for Figure 1 An enlarged schematic diagram of part A in the diagram; Figure 3 This is a top view schematic diagram of a preferred embodiment of the heat insulation cover of this utility model; Figure 4 This is a cross-sectional schematic diagram of a preferred embodiment of the heat insulation cover of this utility model; Figure 5 for Figure 4 An enlarged schematic diagram of part D in the diagram; Figure 6 for Figure 4 An enlarged schematic diagram of part E in the diagram; Figure 7 This is a cross-sectional schematic diagram of a preferred embodiment of the heat insulation cover of the present invention from another perspective. Figure 8 for Figure 7 An enlarged schematic diagram of part F in the diagram; Figure 9 for Figure 1 An enlarged schematic diagram of part B in the diagram; Figure 10 for Figure 1 An enlarged schematic diagram of part C in the diagram; Figure 11 This is a cross-sectional schematic diagram of a cooking utensil according to a preferred embodiment of the present invention.

[0042] Explanation of reference numerals in the attached figures 1: Clay pot body components 2: Pot Inner Layer 3: Heating device 4: Outer shell 5: Base 6: Middle plate 7: Thermal cover 10: Bottom of the cover 11: Annular Reinforcing Section 111: Annular groove 12: Water collection platform 13: Leakage hole 14: Mounting holes 20: Covering the body 21: First straight wall 22: Second straight wall section 23: Corner 24: Curved wall 25: Platform Wall 26: First transition wall 30: Limiting edge 31: Straight Edge 32: Bending edge Detailed Implementation

[0043] 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 embodiments of the present invention may 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 embodiments of the present invention.

[0044] 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.

[0045] In this document, ordinal numbers such as "first" and "second" used in this invention are merely identifiers and do not have any other meaning, such as a specific order. Moreover, 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."

[0046] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0047] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0048] Unless otherwise stated, the numerical ranges in this document include not only the entire range within its two endpoints, but also the subranges contained therein.

[0049] 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.

[0050] Reference Figure 11 This utility model provides a cooking appliance, which includes a pot body assembly 1 and a lid (not shown in the figure). The lid has a shape that substantially corresponds to the pot body assembly 1. The lid is detachably mounted on the pot body assembly 1. The pot body assembly 1 has a cylindrical inner pot storage section. The inner pot 2 can be freely placed into or removed from the inner pot storage section for easy cleaning. The inner pot 2 is typically made of metal and has a circular opening on its upper surface for holding materials to be heated, such as rice or soup. The pot body assembly 1 includes a heating device 3 for heating the inner pot 2.

[0051] It is understood that the cooking appliance according to this utility model can be a rice cooker, an electric pressure cooker or other cooking appliances, and in addition to the function of cooking rice, the cooking appliance can also have various functions such as cooking porridge.

[0052] The cooker body assembly 1 may include an outer shell 4 and a base 5 located below the outer shell 4. The lower end of the outer shell 4 can be connected to the base 5 by any suitable means, such as snap-fit, plug-in, or fasteners such as screws. The outer shell 4 has a cylindrical inner pot storage section. The inner pot 2 can be freely placed into or removed from the inner pot storage section for easy cleaning. The inner pot 2 is typically made of metal and has a circular opening on its upper surface for holding materials to be heated, such as rice or soup. The cooker body assembly 1 also includes a heating device 3 for heating the inner pot 2.

[0053] Optionally, a middle plate 6 is provided at the upper end of the pot body assembly 1. Specifically, the middle plate 6 is connected to the upper end of the outer casing 4. The upper end of the outer casing 4 can be connected to the middle plate 6 by any suitable means such as snap-fit, plug-in, or fasteners such as screws.

[0054] It should be noted that the directional terms used in this article to describe the various components and parts of the cookware assembly 1, such as "up," "down," "above," "below," "upward," "downward," "facing upward," and "facing downward," are relative to the cookware assembly 1 when it is placed horizontally and upright. Unless otherwise specified, "inner" in the directional terms "inward," "outward," "towards," "inner side," and "outer side" refers to the area near the center of the cookware assembly 1, and "outer" refers to the area away from the center of the cookware assembly 1.

[0055] In this design, to reduce heat loss during cooking, a heat insulation cover 7 is installed around the outer periphery of the inner pot 2. The heat insulation cover 7 is fixed to the inner side of the outer shell 4, that is, the heat insulation cover 7 forms the inner wall of the outer shell 4, and the inner pot storage part is formed on the heat insulation cover 7. Optionally, the heat insulation cover 7 is connected to the middle plate 6.

[0056] During use, the insulation cover 7 may be subjected to pressure from internal items, compression or impact from external objects, etc. (Refer to...) Figures 1 to 10 The heat insulation cover 7 of this utility model includes a connected cover base 10 and cover body 20. An annular reinforcing portion 11 is formed on the cover base 10, surrounding its circumference. The annular reinforcing portion 11 enhances the structural stability of the cover base 10, thereby improving the overall structural strength of the heat insulation cover 7. Optionally, the cover base 10 and the annular reinforcing portion 11 are integrally formed.

[0057] As mentioned above, the inner pot 2 is designed to be removable, and there is inevitably a gap between the inner pot 2 and the insulation cover 7, causing condensate to easily accumulate at the bottom of the insulation cover 7. The top surface of the annular reinforcing part 11 is recessed inward to form an annular groove 111, which can catch dripping condensate. Through the annular groove 111, the annular reinforcing part 11 serves as a reinforcing rib while also achieving a lightweight design.

[0058] A water collection platform 12 is formed radially inside the annular reinforcing part 11 at the bottom 10 of the cover. The water collection platform 12 is connected to the annular groove 111, allowing condensate collected in the annular groove 111 to flow naturally into the water collection platform 12. A drain hole 13 is provided through the bottom of the water collection platform 12, through which condensate can be discharged from the insulation cover 7. By placing the drain hole 13 at the bottom of the water collection platform 12, openings are avoided in the annular reinforcing part 11, effectively preventing stress concentration and structural weakness that may result from openings in the annular reinforcing part 11. This ensures that the annular reinforcing part 11 can fully exert its function of enhancing structural strength, guaranteeing the stability and reliability of the overall structure of the insulation cover 7. Optionally, the annular reinforcing part 11 and the water collection platform 12 are integrally formed.

[0059] Optionally, the base cover 10 and the body cover 20 are integrally molded. This integral molding structure allows for better stress transfer and dispersion, improving the overall strength and rigidity of the insulation cover 7 and further enhancing its durability. Simultaneously, it simplifies the manufacturing process and reduces production costs.

[0060] Optionally, the annular groove 111 extends continuously along the circumference of the bottom of the cover 10, forming a continuous closed channel. This allows for the collection of condensate dripping from different locations on the inner wall of the insulation cover 7. The condensate can flow smoothly along the circumference within the annular groove 111 and eventually converge into the water collection platform 12. Correspondingly, the annular reinforcing part 11 extends continuously along the circumference of the bottom of the cover 10, and the continuous annular structure provides better mechanical strength and stability.

[0061] Optionally, multiple water collection platforms 12 are arranged at circumferential intervals along the annular groove 111. Exemplarily, the number of water collection platforms 12 includes, but is not limited to, two, three, four, or six or more. Each water collection platform 12 communicates with the annular groove 111 and is equipped with a drain hole 13. When the condensate volume is large, multiple water collection platforms 12 can operate simultaneously to achieve flow diversion, greatly improving drainage efficiency and capacity. The shape of the drain hole 13 includes, but is not limited to, strip-shaped, arc-shaped, and circular shapes.

[0062] Optionally, multiple water collection platforms 12 are arranged symmetrically. This symmetrical arrangement ensures that the insulation cover 7 is subjected to balanced forces, resulting in greater stability.

[0063] Optionally, the bottom of the cover 10 has mounting holes 14. Optionally, the mounting holes 14 are offset from the water collection platform 12 in the circumferential direction of the bottom of the cover 10. Optionally, the mounting holes 14 are offset from the annular groove 111 in the radial direction of the bottom of the cover 10. That is, the mounting holes 14 do not overlap with the water collection platform 12 in the circumferential direction, nor with the annular groove 111 in the radial direction. The mounting holes 14 are used for wiring, to avoid electrical components, or to provide clearance when the heating plate floats. Separating the water collection area and the installation area avoids the impact of condensate on electrical components.

[0064] Optionally, the annular groove 111 and the water collection platform 12 together form the lowest area on the bottom of the cover 10. By utilizing gravity, all the condensate on the bottom of the cover 10 is actively guided to flow into the drainage structure, thereby improving drainage efficiency.

[0065] Optionally, the inner wall surface of the bottom of the water collecting platform 12 slopes outward and upward from the drain hole 13. The inner wall surface of the water collecting platform 12 forms a guide surface, with the drain hole 13 located at the lowest end of the water collecting platform 12. "Outward" refers to the direction away from the center of the water collecting platform 12 or the drain hole 13. That is, along the inner wall surface of the bottom of the water collecting platform 12, starting from the position of the drain hole 13, the direction away from the center of the hole and towards the edge of the water collecting platform 12 is "outward". "Upward" refers to the direction perpendicular to the inner wall surface of the bottom of the water collecting platform 12 (or the tangent at that point) and away from the material entity of the water collecting platform 12. Simply put, it is "upward", opposite to the direction of gravity. Thus, the entire inner wall surface of the bottom of the water collecting platform 12 forms a guide slope with the drain hole 13 as the lowest point, higher around the edges and lower in the middle. In this way, no matter where the condensate collects at the bottom of the water collection platform 12, it will automatically flow along this "outward and upward" slope under the action of gravity, and eventually be discharged from the drain hole 13 at the lowest point.

[0066] Furthermore, referring to Figure 5 The inclination angle α of the inner wall surface at the bottom of the water collection platform 12 is 5°~9°. The inclination angle α can be, but is not limited to, 5°, 6°, 7°, 8°, and 9°. By limiting this range, we avoid poor flow guidance due to an angle that is too small, and also avoid excessive occupation of vertical space due to an angle that is too large. This angle ensures an optimal balance between efficient flow guidance and space utilization.

[0067] Optionally, the wall thickness of the cover 10 is basically the same throughout. Based on the above embodiment, the outer wall surface of the bottom of the water collection platform 12 is also inclined outward and upward from the water leakage hole 13.

[0068] Optionally, the inner wall of the cover bottom 10 is inclined downward from the center outward, so as to actively guide the condensate dripping on it to the annular groove 111 located on the periphery.

[0069] Furthermore, referring to Figure 8 The inclination angle b of the inner wall surface of the cover bottom 10 is 3°~7°. By limiting this range, we avoid poor airflow due to an angle that is too small, and excessive occupation of vertical space due to an angle that is too large. This angle ensures the best balance between efficient airflow and space utilization.

[0070] Optionally, based on the above embodiments, the outer wall surface of the cover bottom 10 is inclined outward and downward from the center.

[0071] Optionally, the cover body 20 includes a first straight wall portion 21, a corner portion 23, and a second straight wall portion 22. The first straight wall portion 21 is connected to the top end of the cover bottom 10. The corner portion 23 is connected to the top end of the first straight wall portion 21, and at least a portion of the corner portion 23 is recessed from top to bottom towards the central axis of the insulation cover 7. The corner portion 23 serves to receive and guide condensate. The second straight wall portion 22 is connected to the top end of the corner portion 23, and the top end of the second straight wall portion 22 forms an opening in the insulation cover 7. The second straight wall portion 22 forms a wide inlet, increasing the condensate receiving area.

[0072] Among them, reference Figures 4 to 6 The radius of the first straight wall portion 21 is smaller than the radius of the second straight wall portion 22, and the difference d between the radii of the first straight wall portion 21 and the second straight wall portion 22 is 11cm to 15cm. The difference d can be, but is not limited to, 11cm, 12cm, 13cm, 14cm, and 15cm. In this design, the cover body 20 has an flared shape that is larger at the top and smaller at the bottom. Compared to conventional designs in the prior art, the difference in radii between the first straight wall portion 21 and the second straight wall portion 22 is larger, providing geometric space for designing a very gentle, smooth, large R-angle corner. A large R-angle means a gentle change in the flow channel, less resistance to the condensate flow, stable flow velocity, and smooth condensate flow.

[0073] Optionally, the corner portion 23 is recessed from top to bottom towards the central axis of the insulation cover 7. The corner portion 23 includes an arc-shaped wall 24 and a platform wall 25. The arc-shaped wall 24 is located at the upper end of the platform wall 25. In the axial section of the insulation cover 7, the arc-shaped wall 24 is an arc, and the platform wall 25 is a straight line tangent to the arc. The corner portion 23, together with the arc-shaped wall 24 and the platform wall 25, forms an ideal flow path, allowing water droplets to move inward and downward in an orderly manner under the influence of gravity. Optionally, the platform wall 25 is approximately parallel to the horizontal plane. For example, the angle between the platform wall 25 and the horizontal plane is 0~3°.

[0074] Optionally, the platform wall 25 is inclined to the first straight wall portion 21, and the platform wall 25 and the first straight wall portion 21 are smoothly transitioned by a first transition wall 26.

[0075] Optionally, the arc-shaped wall 24 and the second straight wall portion 22 can be smoothly transitioned, or the arc-shaped wall 24 and the second straight wall portion 22 can be smoothly connected by a second transition wall.

[0076] In this design, smooth transitions and connections ensure the continuity of the condensate flow path.

[0077] Optionally, the periphery of the opening of the insulation cover 7 is provided with a plurality of limiting edges 30 arranged at intervals along its circumference. The limiting edges 30 include straight edges 31 and bent edges 32. By setting two types of limiting edges 30, different existing installation structures can be accommodated. Optionally, the limiting edges 30 are snapped onto the middle plate 6.

[0078] 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. Terms such as “set” appearing herein can refer to either a component being directly attached to another component or a component being attached to another component via an intermediary. A feature 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.

[0079] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this utility model to the described embodiments. Those skilled in the art will understand that many more 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 heat insulation cover, characterized in that, The heat insulation cover includes a connected base and a body; The bottom of the cover has an annular reinforcing part that surrounds its circumference, and the top surface of the annular reinforcing part is recessed inward to form an annular groove; The bottom of the cover has a water collection platform formed on the radial inner side of the annular reinforcement. The water collection platform is connected to the annular groove, and a water leakage hole is provided through the bottom of the water collection platform.

2. The heat insulation cover according to claim 1, characterized in that, The insulation cover is integrally formed; and / or The annular reinforcement extends continuously along the circumferential direction of the bottom of the cover; and / or Multiple water collection platforms are arranged at circumferential intervals along the annular reinforcement; and / or Multiple water collection platforms are symmetrically arranged.

3. The heat insulation cover according to claim 1 or 2, characterized in that, The bottom of the cover has mounting holes; wherein... The mounting hole and the water collection platform are offset from each other along the circumferential direction of the bottom of the cover; The mounting hole and the annular groove are offset along the radial direction of the bottom of the cover.

4. The heat insulation cover according to claim 1 or 2, characterized in that, The annular groove and the water collection platform together form the lowest area on the bottom of the cover.

5. The heat insulation cover according to claim 1, characterized in that, The inner wall of the bottom of the water collection platform slopes outward and upward from the drain hole.

6. The heat insulation cover according to claim 5, characterized in that, The inclination angle of the inner wall surface at the bottom of the water collection platform is 5°~9°.

7. The heat insulation cover according to claim 1, characterized in that, The inner wall of the cover bottom slopes outward and downward from the center.

8. The heat insulation cover according to claim 7, characterized in that, The inclination angle of the inner wall surface of the cover bottom is 3°~7°.

9. The heat insulation cover according to claim 1, characterized in that, The cover includes: The first straight wall portion is connected to the top of the bottom of the cover; The corner portion, connected to the top of the first straight wall portion, at least part of the corner portion is recessed from top to bottom toward the central axis of the insulation cover; The second straight wall portion is connected to the top of the corner portion, and the top of the second straight wall portion forms the opening of the heat insulation cover; Wherein, the radius of the first straight wall portion is smaller than the radius of the second straight wall portion, and the difference between the radius of the first straight wall portion and the radius of the second straight wall portion is 11cm~15cm.

10. The heat insulation cover according to claim 9, characterized in that, The corner portion is recessed from top to bottom toward the central axis of the heat insulation cover. The corner portion includes an arc-shaped wall and a platform wall, with the arc-shaped wall located at the upper end of the platform wall. In the axial section of the heat insulation cover, the arc-shaped wall is an arc, and the platform wall is a straight line tangent to the arc.

11. The heat insulation cover according to claim 10, characterized in that, The platform wall is inclined to the first straight wall portion, and the platform wall and the first straight wall portion are smoothly transitioned by a first transition wall; and / or The arc-shaped wall smoothly transitions to the second straight wall portion, or the arc-shaped wall and the second straight wall portion are smoothly connected by a second transition wall.

12. The heat insulation cover according to claim 1 or 9, characterized in that, The periphery of the opening of the heat insulation cover is provided with a plurality of limiting clips arranged at intervals along its circumference. The limiting edge includes a straight edge and a bent edge.

13. A cooking utensil, characterized in that, The invention includes a pot body assembly and a lid covering the pot body assembly. The pot body assembly includes an outer shell, a heat insulation cover, and a pot inner liner connected sequentially from the outside to the inside. The heat insulation cover is the heat insulation cover according to any one of claims 1 to 12.

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