Double-bottom pot

Abstract

The double-bottom pot comprises a pot body and a double-bottom piece arranged at the bottom of the pot body, the double-bottom piece comprises an inner double bottom and an outer double bottom, a limiting structure is arranged on the surface of the side, facing the inner double bottom, of the outer double bottom, and a mounting cavity is defined by the limiting structure and the pot body; the inner composite bottom is arranged in the mounting cavity, and the limiting structure abuts against the inner composite bottom so as to limit the inner composite bottom to move relative to the outer composite bottom. The relative position relation between the inner composite bottom and the outer composite bottom is fixed, combination between the inner composite bottom and the outer composite bottom is tighter and fuller, the inner composite bottom is not prone to eccentricity, the position precision of the inner composite bottom and the outer composite bottom installed at the bottom of the pot body can be guaranteed, accordingly, the respective functions are guaranteed, and the yield of the pot is increased.

Description

Technical Field

[0001] The present application belongs to the technical field of cookware, and in particular relates to a composite bottom cookware. Background Art

[0002] Existing cookware, especially cookware used in electromagnetic cooking equipment, usually uses aluminum or stainless steel as the pot body, which absorbs relatively little electromagnetic waves emitted by electromagnetic cooking equipment, resulting in low thermal efficiency, high power consumption, and long cooking time when the cookware is in use. To solve this technical problem, some cookware will add an outer composite bottom with strong magnetic conductivity to the bottom of the pot body to increase the pot's electromagnetic absorption. In addition, in order to make the cookware heat more quickly and evenly, an inner composite bottom with a high thermal conductivity coefficient will be added between the outer composite bottom and the bottom of the pot body.

[0003] In the prior art, the processing and manufacturing method for the bottom of the pot body, the inner composite bottom and the outer composite bottom is to use brazing agent and brazing material, through high-frequency heating (such as 500°C) and pressurization, so that the brazing agent and brazing material reach the melting point, and directly bond the outer composite bottom, the inner composite bottom and the bottom of the pot body together. The existing outer composite bottom includes a bottom wall and a bent portion connected to the bottom wall and bent relative to the bottom wall to abut against the bottom of the pot body. The inner composite bottom is sandwiched between the bottom of the pot body and the bottom wall of the outer composite bottom. During the processing and manufacturing process, the inner composite bottom and the outer composite bottom are sequentially laminated on the bottom of the pot body, and then the outer composite bottom is fixedly connected to the pot body by brazing to form a pot with a composite bottom.

[0004] However, the welding effect between the bent part and the bottom of the pot body of the current cookware is not very stable, and problems such as cold welding and poor welding effect are prone to occur. Even if the weld looks normal from the outside, the outer bottom is prone to fall off after repeated slight impacts during normal use, which eventually leads to the fall-off of the composite bottom sheet, reducing the service life of the cookware. Utility Model Content

[0005] The present application provides a composite bottom cookware to solve the problem that the existing composite bottom is easy to fall off, thus seriously affecting the service life of the cookware.

[0006] The technical solution adopted in this application is:

[0007] A composite bottom cookware comprises a cookware body and a composite bottom sheet arranged at the bottom of the cookware body, the composite bottom sheet comprises an inner composite bottom and an outer composite bottom, a limiting structure is arranged on a surface of the outer composite bottom facing the inner composite bottom, the limiting structure and the cookware body are surrounded to form an installation cavity, the inner composite bottom is arranged in the installation cavity, and the limiting structure is abutted against the inner composite bottom to limit the movement of the inner composite bottom relative to the outer composite bottom.

[0008] The composite bottom cookware in the present application also includes the following additional technical features:

[0009] The top of the inner composite bottom extends outward from the limiting structure so that the top surface of the inner composite bottom abuts against the bottom of the pot body.

[0010] A limiting groove is arranged on one side of the outer composite bottom facing the inner composite bottom, the limiting groove is adapted to the inner composite bottom to form the limiting structure, and the side wall and the bottom wall of the limiting groove abut against the inner composite bottom to limit the movement of the inner composite bottom relative to the outer composite bottom.

[0011] The outer composite bottom includes a bottom wall and a flange portion fixedly connected to the bottom wall and extending upward, and the bottom wall and the flange portion cooperate to form the limiting groove.

[0012] The outer composite bottom also includes a bending portion which is fixedly connected to the flange portion and bent relative to the flange portion, and the bending portion is fixedly connected to the bottom of the pot body.

[0013] The included angle between the flange portion and the bent portion is α, and the included angle α satisfies: α>90°.

[0014] In view of the fact that the structural strength of the outer composite bottom is affected to a certain extent when the limiting structure is set, the present application provides the following additional technical features to address this problem:

[0015] A plurality of reinforcing ribs are convexly arranged on a side of the bottom wall of the outer composite bottom facing away from the inner composite bottom.

[0016] The outer composite bottom includes a bottom wall and a flange portion fixedly connected to the bottom wall and extending upward, and the bottom wall and the flange portion cooperate to form the limiting structure; the flange portion is provided with an inner concave portion protruding toward one side of the bottom of the pot body.

[0017] The inner recesses are arranged at intervals along the circumference of the flange portion, or the inner recesses are arranged in a ring shape along the circumference of the flange portion.

[0018] The outer composite bottom includes a bottom wall and a flange portion fixedly connected to the bottom wall and extending upward, and the bottom wall and the flange portion cooperate to form the limiting structure; the flange portion is provided with an outer protrusion protruding from one side of the bottom of the pot body away from the pot body.

[0019] The outer protrusions are arranged at intervals along the circumference of the flange portion, or the outer protrusions are arranged in a ring shape along the circumference of the flange portion.

[0020] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0021] 1. After research, it was found that the main reason for the unstable connection of the outer composite bottom was the deformation of the outer composite bottom. It was further found that the pot body with the outer composite bottom falling off was often accompanied by the problem of the position displacement of the inner composite bottom. This is because the production process puts forward high position accuracy requirements for the relative position relationship between the bottom of the pot body, the inner composite bottom and the outer composite bottom. If the alignment is not accurate, the inner composite bottom and / or the outer composite bottom are likely to deviate from the preset installation position. The bottom wall of the existing outer composite bottom only supports the inner composite bottom in the up and down directions. There is a large gap between the outer periphery of the inner composite bottom and the bending part of the outer composite bottom. When the inner composite bottom is offset, there will be a problem that the gap is large on one side and small on the other side. For the side with a small gap, the pressure generated by the inner composite bottom on the outer composite bottom is greater, resulting in the compression deformation of the outer composite bottom, which is prone to the problem of poor welding effect of the outer composite bottom and easier to detach from the pot body, which leads to the overall easy falling of the outer composite bottom. In addition, if the pressure exerted by the outer composite bottom on the inner composite bottom is small, the inner composite bottom may also deviate after being stressed during use, and the above-mentioned problem will cause the outer composite bottom to fall off.

[0022] The present application sets a limiting structure on the side of the outer composite bottom facing the inner composite bottom, and the limiting structure is offset against the inner composite bottom to limit the movement of the inner composite bottom relative to the outer composite bottom, so that during the processing and manufacturing process of the composite bottom cookware, the relative position relationship between the inner composite bottom and the outer composite bottom is fixed, and the connection between the inner composite bottom and the outer composite bottom is tighter and fuller. Compared with the prior art in which the inner composite bottom is fixedly connected to the bottom of the pot body and the outer composite bottom is fixedly connected to the fixed inner composite bottom and the bottom of the pot body respectively, the present application can optimize the processing and manufacturing process of the composite bottom cookware. Due to the existence of the limiting structure, the relative position between the inner composite bottom and the outer composite bottom can be guaranteed. Therefore, during the processing and manufacturing process of the composite bottom cookware, the outer composite bottom can be fixedly connected together with the inner composite bottom to the bottom of the pot body, which simplifies the assembly process and improves the assembly efficiency of the cookware. Furthermore, since the relative positional relationship between the inner and outer composite bottoms is easy to ensure in the present application, the inner composite bottom is not easily placed eccentrically, which helps to ensure the positional accuracy of the two when installed to the bottom of the pot body, thereby ensuring the performance of their respective functions, and solving the problem of the outer composite bottom falling off due to the offset of the inner composite bottom, thereby improving the yield rate and life of the pot.

[0023] 2. As a preferred embodiment of the present application, the thickness of the inner composite bottom is greater than the thickness of the limiting structure, so that after the inner composite bottom is installed in the installation cavity, the top surface of the inner composite bottom can abut against the bottom of the pot body. On the one hand, the relative position of the inner composite bottom and the bottom of the pot body can be ensured, and the function of the inner composite bottom can be fully exerted. For example, when the inner composite bottom is made of a material with a high thermal conductivity coefficient, if the inner composite bottom abuts against the bottom of the pot body, contact heat transfer can be achieved, heat transfer efficiency is improved, and cooking time is shortened. On the other hand, during the processing and manufacturing process of the composite bottom cookware in this embodiment, the bottom of the inner composite bottom abuts against the outer composite bottom, and the top abuts against the bottom of the pot body. The displacement of the inner composite bottom in the vertical direction in the installation cavity is effectively limited, which can save the need to inject materials for fixing and connecting between the inner composite bottom and the bottom of the pot body, thereby saving the assembly process and reducing the production cost. In addition, the technical problem of uneven heating caused by different heat transfer coefficients due to the addition of other structures or materials between the inner composite bottom and the bottom of the pot body can be avoided.

[0024] 3. As a preferred embodiment of the present application, the outer composite bottom includes a bottom wall and a flange portion fixedly connected to the bottom wall and extending upward. In this embodiment, the bottom wall and the flange portion arranged on the outer peripheral edge of the bottom wall form a limiting structure for limiting the displacement of the inner composite bottom. The structural design of the outer composite bottom is simple and the processing and manufacturing are convenient. In addition, the flange portion extending upward is arranged on the outer periphery of the bottom wall, which helps to improve the structural strength of the outer composite bottom, reduce the probability of its deformation, and extend the service life of the cookware.

[0025] 4. As a preferred embodiment of the present application, the outer composite bottom includes a bottom wall, a flange portion fixedly connected to the bottom wall and extending upward, and a bent portion fixedly connected to the flange portion and bent relative to the flange portion, and one end of the bent portion is fixedly connected to the bottom of the pot body. Compared with the flange portion, the bent portion continues to bend. On the one hand, it can reduce the heat conduction gap between the other end of the bent portion and the bottom of the pot body, improve the heat transfer efficiency, and avoid the occurrence of the bottom sticking phenomenon caused by overheating of a local area of ​​the bottom of the pot body. On the other hand, it can reduce the area of ​​heat blocking and shielding of the bent portion during heating, and improve the heating efficiency of the heating unit to the pot body. Furthermore, the design of the bent portion helps to reduce the gap between the outer periphery of the inner composite bottom, the outer composite bottom and the bottom of the pot body, improve the connection strength between the outer composite bottom and the bottom of the pot body, and the outer composite bottom is not easy to fall off, which effectively extends the service life of the cookware.

[0026] 5. As a preferred embodiment of the present application, a plurality of reinforcing ribs are convexly provided on the side of the bottom wall of the outer composite bottom facing away from the inner composite bottom, thereby improving the structural strength of the outer composite bottom, reducing the probability of deformation of the outer composite bottom due to stress and deformation caused by high heat in local areas, thereby indirectly ensuring the installation environment of the inner composite bottom, reducing the probability of deformation of the inner composite bottom, and extending the service life of the cookware. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0028] Figure 1 This is an exploded view of a double-bottomed cookware according to an embodiment of the present application;

[0029] Figure 2 This is a cross-sectional view of a double-bottomed cookware according to one embodiment of the present application;

[0030] Figure 3 for Figure 2 A magnified view of part A;

[0031] Figure 4 This is a three-dimensional diagram of a double-bottomed cookware according to an embodiment of the present application;

[0032] Figure 5 This is a three-dimensional diagram of a double-bottomed cookware in another embodiment of the present application;

[0033] Figure 6 for Figure 5 A magnified view of part B;

[0034] Figure 7 This is a cross-sectional view of a double-bottomed cookware according to another embodiment of the present application;

[0035] Figure 8 for Figure 7 Enlarged view of part C;

[0036] Fig. 9 This is a cross-sectional view of a composite bottom cookware according to another embodiment of the present application;

[0037] Fig.10 for Fig. 9 Enlarged view of part D.

[0038] in,

[0039] 1. Pot body;

[0040] 2. outer bottom; 21. bottom wall; 22. flange portion; 23. bending portion;

[0041] 3. Internal compound bottom;

[0042] 4. Strengthen the ribs;

[0043] 5. Inner concave part;

[0044] 6. Outer convex part. DETAILED DESCRIPTION

[0045] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0046] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features in each embodiment may be combined with each other without conflict.

[0047] In addition, in the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0048] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0050] like Figures 1 to 3 As shown, a composite bottom cookware comprises a pot body 1 and a composite bottom sheet arranged at the bottom of the pot body 1, the composite bottom sheet comprises an inner composite bottom 3 and an outer composite bottom 2, a limiting structure is arranged on a surface of the outer composite bottom 2 facing the inner composite bottom 3, the limiting structure and the pot body 1 surround each other to form an installation cavity, the inner composite bottom 3 is arranged in the installation cavity, and the limiting structure is against the inner composite bottom 3 to limit the movement of the inner composite bottom 3 relative to the outer composite bottom 2.

[0051] The present application does not limit the materials of the inner composite bottom 3 and the outer composite bottom 2, which can be selected according to different heating facilities or functional requirements (such as energy storage, energy collection, etc.). In a preferred embodiment, the outer composite bottom 2 is a structure made of a magnetic conductive material, and the inner composite bottom 3 is a structure made of a material with a high thermal conductivity coefficient, so that the composite bottom pot in this embodiment can be adapted to electromagnetic cooking utensils, and the heat transfer from the outer composite bottom 2 to the bottom of the pot body 1 is achieved through the inner composite bottom 3 with good thermal conductivity, so that the pot body 1 is heated more quickly, thereby improving cooking efficiency.

[0052] The present application sets a limiting structure on the side of the outer composite bottom 2 facing the inner composite bottom 3, and the limiting structure is against the inner composite bottom 3 to limit the movement of the inner composite bottom 3 relative to the outer composite bottom 2, so that during the processing and manufacturing process of the composite bottom cookware, the relative position relationship between the inner composite bottom 3 and the outer composite bottom 2 is fixed, and the connection between the inner composite bottom 3 and the outer composite bottom 2 is tighter and fuller. Compared with the prior art in which the inner composite bottom 3 is fixedly connected to the bottom of the pot body 1 and the outer composite bottom 2 is fixedly connected to the fixed inner composite bottom 3 and the bottom of the pot body 1 respectively, the present application can optimize the processing and manufacturing process of the composite bottom cookware. Due to the existence of the limiting structure, the relative position between the inner composite bottom 3 and the outer composite bottom 2 can be guaranteed. Therefore, during the processing and manufacturing process of the composite bottom cookware, the outer composite bottom 2 can be fixedly connected together with the inner composite bottom 3 to the bottom of the pot body 1, which simplifies the assembly process and improves the assembly efficiency of the cookware. Furthermore, since the relative positional relationship between the inner composite bottom 3 and the outer composite bottom 2 is easy to ensure in the present application, the inner composite bottom 3 is not easily placed eccentrically, which helps to ensure the positional accuracy of the two when installed to the bottom of the pot body 1, thereby ensuring the performance of their respective functions, and solving the problem of the outer composite bottom falling off due to the displacement of the inner composite bottom, thereby improving the yield rate and service life of the cookware.

[0053] As a preferred embodiment of the present application, Figure 3 As shown, the top of the inner composite bottom 3 extends outward from the limit structure so that the top surface of the inner composite bottom 3 abuts against the bottom of the pot body 1. Such a configuration can ensure the relative position of the inner composite bottom 3 and the bottom of the pot body 1, and ensure that the function of the inner composite bottom 3 is fully utilized. For example, when the inner composite bottom 3 is made of a material with a high thermal conductivity coefficient, if the inner composite bottom 3 abuts against the bottom of the pot body 1, contact heat transfer can be achieved, the heat transfer efficiency is improved, and the cooking time is shortened. On the other hand, during the processing and manufacturing process of the composite bottom cookware in this embodiment, the bottom of the inner composite bottom 3 abuts against the outer composite bottom 2, and the top abuts against the bottom of the pot body 1, and the displacement of the inner composite bottom 3 in the vertical direction in the installation cavity is effectively limited, which can save the injection of materials for fixing and connecting between the inner composite bottom 3 and the bottom of the pot body 1, which not only saves the assembly process, but also reduces the production cost, and can avoid the technical problem of uneven heating caused by adding other structures or materials between the inner composite bottom 3 and the bottom of the pot body 1 due to different heat transfer coefficients.

[0054] The limiting structure in this application can adopt any one of the following implementations:

[0055] Embodiment 1: The outer composite bottom 2 includes a bottom wall 21, and a limiting convex rib extending upward is provided on the side of the bottom wall 21 facing the inner composite bottom 3, and the limiting convex rib cooperates with the bottom wall 21 to form a limiting structure. More specifically, the limiting convex rib and the bottom wall 21 in this embodiment 1 are separately formed and then fixedly connected, and the two cooperate with each other to form a limiting structure adapted to the inner composite bottom 3.

[0056] Implementation method 2: Figure 3 As shown, the outer composite bottom 2 includes a bottom wall 21 and a flange portion 22 that is fixedly connected to the bottom wall 21 and extends upward, and the bottom wall 21 and the flange portion 22 cooperate to form a limiting groove structure. More specifically, the bottom wall 21 and the flange portion 22 in the second embodiment are an integrally formed structure, and the flange portion 22 is bent relative to the bottom wall 21 to cooperate with the bottom wall 21 to form a limiting structure. In the second embodiment, the bottom wall 21 and the flange portion 22 provided on the outer periphery of the bottom wall 21 form a limiting structure for limiting the displacement of the inner composite bottom 3. The structural design of the outer composite bottom 2 is simple, and the processing and manufacturing are convenient. Moreover, the flange portion 22 extending upward is provided on the outer periphery of the bottom wall 21 to help improve the structural strength of the outer composite bottom 2, reduce the probability of its deformation, and extend the service life of the cookware.

[0057] Embodiment three: The wall of the outer composite bottom 2 facing the inner composite bottom 3 is concave, that is, the wall is partially thick and partially thin, and the concave part forms a limiting groove that is adapted to the shape and size of the inner composite bottom 3. The inner composite bottom 3 is accommodated in the limiting groove, and the side walls and bottom wall of the limiting groove are abutted against the inner composite bottom 3 to limit the inner composite bottom 3.

[0058] As a preferred embodiment of the second embodiment, Figure 3 As shown, the outer composite bottom 2 also includes a bent portion 23 that is fixedly connected to the flange portion 22 and bent relative to the flange portion 22, and the bent portion 23 is fixedly connected to the bottom of the pot body 1. Compared with the flange portion 22, the bent portion 23 is further bent. On the one hand, it can reduce the heat conduction gap between the other end of the bent portion 23 and the bottom of the pot body 1, improve the heat transfer efficiency, and avoid the occurrence of the bottom burning phenomenon caused by overheating of the local area of ​​the bottom of the pot body 1. On the other hand, it can reduce the area of ​​heat blocking and shielding of the bent portion 23 during the heating process, and improve the heating efficiency of the heating unit to the pot body 1. Furthermore, the design of the bent portion 23 helps to reduce the gap between the outer periphery of the inner composite bottom 3, the outer composite bottom 2 and the bottom of the pot body 1, improve the connection strength between the outer composite bottom 2 and the bottom of the pot body 1, and the outer composite bottom 2 is not easy to fall off, which effectively extends the service life of the pot.

[0059] In one example, the included angle between the flange portion 22 and the bent portion 23 is α, the included angle α is equal to 90°, and the bent portion 23 is arranged parallel to the bottom wall 21 of the outer composite bottom 2 .

[0060] In another example, Figure 3 As shown, the angle between the flange portion 22 and the bend portion 23 is α, and the angle α satisfies: α>90°. With such an arrangement, the gap between the bend portion 23 and the bottom of the pot body 1 can be gradually reduced from the end of the bend portion 23 connected to the flange portion 22 to the end of the bend portion 23 away from the flange portion 22. On the one hand, the area of ​​heat blocking by the bend portion 23 during heating can be further reduced to improve the heating efficiency. On the other hand, it helps to achieve the connection and fixation between the bend portion 23 and the bottom of the pot body 1. For the implementation method of welding and fixing the outer composite bottom 2 to the bottom of the pot body 1 through processes such as brazing, this example helps to reduce the amount of brazing material, which not only saves costs, but also allows one end of the bend portion 23 to be infinitely close to the bottom of the pot body 1, reducing the exposed area of ​​the brazing material and reducing the probability of the outer composite bottom 2 peeling off.

[0061] Furthermore, the bent portion 23 extends upward at an angle, and the top end surface of the bent portion 23 is fixedly sealed and connected to the bottom of the pot body 1, thereby preventing external impurities, water, etc. from entering the space between the pot body 1 and the outer composite bottom 2 through the joint between the outer composite bottom 2 and the bottom of the pot body 1, thereby avoiding the growth of bacteria, etc., and reducing the probability of peeling of the outer composite bottom 2 due to corrosion, etc.

[0062] In a preferred example, the bending portion 23 is fixed to the bottom of the pot body 1 by brazing, and brazing is used to achieve both a fixed connection between the bending portion 23 and the bottom of the pot body 1 and a sealing between the top end surface of the bending portion 23 and the bottom of the pot body 1 .

[0063] The structure of the outer composite bottom 2 in the present application can adopt any one of the following embodiments:

[0064] Implementation method three: Figure 4 As shown, a plurality of reinforcing ribs 4 are convexly provided on the side of the bottom wall 21 of the outer composite bottom 2 facing away from the inner composite bottom 3. By providing a plurality of reinforcing ribs 4, the structural strength of the outer composite bottom 2 is improved, and the probability of deformation of the outer composite bottom 2 due to stress and high heat in a local area is reduced, thereby indirectly ensuring the installation environment of the inner composite bottom 3, reducing the probability of deformation of the inner composite bottom 3, and extending the service life of the cookware.

[0065] The third embodiment does not limit the arrangement of the reinforcing ribs 4 on the bottom wall 21 of the outer composite bottom 2. Figure 4 As shown, a plurality of reinforcing ribs 4 are radially distributed on the bottom wall 21 of the outer composite bottom 2. In another example, a plurality of reinforcing ribs 4 are crisscrossed on the bottom wall 21 of the outer composite bottom 2 and arranged in a grid shape.

[0066] Implementation method 4: Figures 5 to 8As shown, the outer composite bottom 2 includes a bottom wall 21 and a flange portion 22 that is fixedly connected to the bottom wall 21 and extends upward, and the bottom wall 21 and the flange portion 22 cooperate to form a limiting structure; the flange portion 22 is provided with an inner concave portion 5 that protrudes toward the bottom side of the pot body 1. The outer composite bottom 2 also includes a bending portion 23 that is fixedly connected to the flange portion 22 and bent relative to the flange portion 22, and the bending portion 23 is fixedly connected to the bottom of the pot body 1. By punching out the inner concave portion 5 on the flange portion 22, the structural strength of the flange portion 22 can be improved, and the probability of the flange portion 22 being deformed by force can be reduced. Moreover, the flange portion 22 is connected to the bending portion 23. When the bending portion 23 has a tendency to peel off the bottom of the pot body 1, due to the presence of the inner concave portion 5, the flange portion 22 can pull the bending portion 23, reducing the probability of the bending portion 23 falling off, thereby extending the service life of the pot. In addition, the presence of the inner concave portion 5 can also make the appearance of the pot have diversity, thereby meeting the needs of different users for different appearances.

[0067] In one example, if Figure 5 As shown, the inner recesses 5 are arranged at intervals along the circumference of the flange portion 22. In another example, the inner recesses 5 are arranged in a ring shape along the circumference of the flange portion 22.

[0068] Furthermore, a plurality of reinforcing ribs 4 are convexly provided on the side of the bottom wall 21 of the outer composite bottom 2 facing away from the inner composite bottom 3. By adding reinforcing ribs 4 to the bottom wall 21 of the outer composite bottom 2, the structural strength of the outer composite bottom 2 is further improved, and the probability of deformation of the outer composite bottom 2 is reduced.

[0069] Implementation method five: Fig. 9 and Fig.10 As shown, the outer composite bottom 2 includes a bottom wall 21 and a flange portion 22 that is fixedly connected to the bottom wall 21 and extends upward, and the bottom wall 21 and the flange portion 22 cooperate to form a limiting structure; the flange portion 22 is provided with an outer protrusion 6 that protrudes from the bottom side of the pot body 1. The outer composite bottom 2 also includes a bending portion 23 that is fixedly connected to the flange portion 22 and bent relative to the flange portion 22, and the bending portion 23 is fixedly connected to the bottom of the pot body 1. By stamping the outer protrusion 6 out of the flange portion 22, the structural strength of the flange portion 22 can be improved, and the probability of the flange portion 22 being deformed by force can be reduced. Moreover, the flange portion 22 is connected to the bending portion 23. When the bending portion 23 has a tendency to peel off the bottom of the pot body 1, due to the presence of the outer protrusion 6, the flange portion 22 can pull the bending portion 23, reducing the probability of the bending portion 23 falling off, thereby extending the service life of the pot. In addition, the presence of the outer protrusion 6 can also make the appearance of the cookware diverse, thereby meeting the needs of different users for different appearances.

[0070] In one example, the outer protrusions 6 are arranged at intervals along the circumference of the flange portion 22. In another example, the outer protrusions 6 are arranged in a ring shape along the circumference of the flange portion 22.

[0071] Furthermore, a plurality of reinforcing ribs 4 are convexly provided on the side of the bottom wall 21 of the outer composite bottom 2 facing away from the inner composite bottom 3. By adding reinforcing ribs 4 to the bottom wall 21 of the outer composite bottom 2, the structural strength of the outer composite bottom 2 is further improved, and the probability of deformation of the outer composite bottom 2 is reduced.

[0072] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0073] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0074] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A composite bottom cookware, comprising a cooker body and a composite bottom sheet arranged at the bottom of the cooker body, wherein the composite bottom sheet comprises an inner composite bottom and an outer composite bottom, wherein: A limiting structure is provided on one side surface of the outer composite bottom facing the inner composite bottom. The limiting structure and the pot body are surrounded to form an installation cavity. The inner composite bottom is arranged in the installation cavity, and the limiting structure is against the inner composite bottom to limit the movement of the inner composite bottom relative to the outer composite bottom.

2. The composite bottom cookware according to claim 1, characterized in that: A limiting groove is arranged on one side of the outer composite bottom facing the inner composite bottom, the limiting groove is adapted to the inner composite bottom to form the limiting structure, and the side wall and the bottom wall of the limiting groove abut against the inner composite bottom to limit the movement of the inner composite bottom relative to the outer composite bottom.

3. The composite bottom cookware according to claim 2, characterized in that: The outer composite bottom includes a bottom wall and a flange portion fixedly connected to the bottom wall and extending upward, and the bottom wall and the flange portion cooperate to form the limiting groove.

4. The composite bottom cookware according to claim 3, characterized in that: The outer composite bottom also includes a bending portion which is fixedly connected to the flange portion and bent relative to the flange portion, and the bending portion is fixedly connected to the bottom of the pot body.

5. The composite bottom cookware according to claim 4, characterized in that: The included angle between the flange portion and the bent portion is α, and the included angle α satisfies: α>90°.

6. The composite bottom cookware according to claim 1, characterized in that: The top of the inner composite bottom extends outward from the limiting structure so that the top surface of the inner composite bottom abuts against the bottom of the pot body.

7. A composite bottom cookware according to any one of claims 1 to 6, characterized in that: A plurality of reinforcing ribs are convexly arranged on a side of the bottom wall of the outer composite bottom facing away from the inner composite bottom.

8. The composite bottom cookware according to any one of claims 1 to 6, characterized in that: The outer composite bottom includes a bottom wall and a flange portion fixedly connected to the bottom wall and extending upward, and the bottom wall and the flange portion cooperate to form the limiting structure; the flange portion is provided with an inner concave portion protruding toward one side of the bottom of the pot body.

9. The composite bottom cookware according to claim 8, characterized in that: The inner recesses are arranged at intervals along the circumference of the flange portion, or the inner recesses are arranged in a ring shape along the circumference of the flange portion.

10. The composite bottom cookware according to any one of claims 1 to 6, characterized in that: The outer composite bottom includes a bottom wall and a flange portion fixedly connected to the bottom wall and extending upward, and the bottom wall and the flange portion cooperate to form the limiting structure; the flange portion is provided with an outer protrusion protruding from one side of the bottom of the pot body away from the pot body.

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