Electric stewpot

Abstract

The utility model discloses an electric stewpot which comprises an outer pot and a ceramic inner container, a containing cavity used for containing the ceramic inner container is defined by the outer pot, part of the area of the bottom wall of the outer pot protrudes upwards to form a supporting part, a heating device is arranged on the lower side of the supporting part, and the electric stewpot further comprises a cover plate arranged relative to the supporting part in a split mode. The cover plate is arranged in the center area of the supporting part, and the cover plate and the supporting part jointly form a bearing platform used for supporting the ceramic inner container. According to the utility model, the cover plate for supporting the ceramic liner and the supporting part are of a split structure, so that the cover plate and the supporting part can be independently processed and structurally designed and subsequently mounted on the supporting part. Therefore, the cover plate can be stacked in the central area of the supporting part, the thickness of the central area of the bearing platform is increased, and the strength of the area is improved. And the cover plate is in contact with the ceramic liner, so that the contact effect is improved, the contact heat transfer efficiency of the heating device to the ceramic liner is improved, and the ceramic liner is heated more uniformly.

Description

Technical Field

[0001] The utility model belongs to the technical field of kitchen appliances, and in particular relates to an electric stew pot. Background Art

[0002] A direct-stew electric stew pot usually includes an outer pot made of metal and an inner pot placed in the outer pot. A heating element heats the outer pot and transfers heat to the inner pot through heat conduction or heat radiation.

[0003] The inner pot is usually placed directly on the bottom wall of the outer pot, and the bottom wall of the outer pot is used to support the inner pot. However, during use, due to the arrangement of the heating element and the contact effect between the inner pot and the bottom wall of the outer pot, the heat transfer efficiency between the bottom wall of the outer pot and the inner pot is uneven, and there is a temperature difference between different areas.

[0004] Not only that, the inner pot is placed on the bottom wall of the outer pot, and the force between the bottom of the inner pot and the bottom wall of the outer pot is also relatively uneven. The central area of ​​the inner pot exerts greater pressure on the outer pot, and the wear with the outer pot is more serious, making the central area of ​​the outer pot bottom wall prone to deformation and other defects.

[0005] In the prior art, the outer pot is usually processed in one piece by pressing or other methods, and the thickness of the bottom wall of the outer pot is uniform after forming. If you want to adjust the thickness and structure of the bottom wall of the outer pot to obtain higher strength or improve thermal conductivity, etc., you need to improve the structure of the outer pot as a whole, and it is difficult to improve the structure of the local area of ​​the bottom wall of the outer pot. This not only increases the difficulty of processing and manufacturing, but also adjusts the overall structure of the outer pot, such as increasing the wall thickness, which will inevitably lead to material waste and increase production costs. Utility Model Content

[0006] The utility model provides an electric stew pot to solve the problems that the heat transfer efficiency at the center and the outside of the existing outer pot bottom is uneven and the center strength is low, and when the bottom structure is modified, the processing difficulty is high and the production cost is increased, and local modification cannot be performed.

[0007] The technical solution adopted by the utility model is:

[0008] An electric stew pot comprises an outer pot and a ceramic inner pot, wherein the outer pot forms a containing cavity for placing the ceramic inner pot, a part of the bottom wall of the outer pot bulges upward to form a supporting portion, a heating device is arranged on the lower side of the supporting portion, and the electric stew pot further comprises a cover plate separately arranged relative to the supporting portion, the cover plate is arranged in the central area of ​​the supporting portion, and the cover plate and the supporting portion together constitute a supporting platform for supporting the ceramic inner pot.

[0009] The electric stew pot of the utility model also has the following additional technical features:

[0010] The support part has a first outer pot body located at the lower side of the cover plate, and a second outer pot body surrounding the outer periphery of the cover plate. A cavity is provided between the first outer pot body and the cover plate. The cover plate contacts the support part for heat transfer.

[0011] The electric stew pot also includes a cover shell and a connecting piece. The cover shell is located on the outside of the outer pot. The connecting piece is used to connect the outer pot and the cover shell. The first outer pot body includes a contact portion and an installation groove. One end of the connecting piece extends into the installation groove. A cavity is formed between the cover plate and the installation groove. The cover plate contacts the contact portion to transfer heat.

[0012] One end of the connecting piece is fixed to the cover plate, so that the cover plate can abut against the contact portion under the pulling force of the connecting piece.

[0013] A through hole is arranged in the central area of ​​the support part, the cover plate is fixed to the support part and covers the through hole, and the cover plate contacts the support part to transfer heat.

[0014] The heat transfer coefficient of the cover plate is greater than the heat transfer coefficient of the support portion.

[0015] The heating device is in contact with the cover plate and / or the support portion.

[0016] The supporting part comprises a first outer pot body located at the lower side of the cover plate, and a second outer pot body surrounding the outer periphery of the cover plate, and the cover plate abuts against the first outer pot body.

[0017] The central area of ​​the support part is provided with an accommodating sink groove, and the cover plate is fixed in the accommodating sink groove.

[0018] The side wall of the outer pot is also provided with a heating element, and the projection of the heating element toward the ceramic inner pot is located on the side wall of the ceramic inner pot.

[0019] Due to the adoption of the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0020] 1. In the utility model, the bottom wall of the outer pot is provided with a support portion that bulges upward, and the central area of ​​the support portion is provided with a cover plate that is separately provided with the support portion, so that the supporting platform for supporting the ceramic inner pot is a split structure, and the cover plate and the support portion are split structures, so they can be processed and structurally designed separately, and then installed to the support portion. Therefore, the cover plate can be stacked in the central area of ​​the support portion to increase the thickness of the central area of ​​the supporting platform, thereby improving the strength of the area, reducing the possibility of deformation or damage, and improving the wear resistance of the central area of ​​the supporting platform and reducing wear. It is also possible to improve the contact effect by contacting the ceramic inner pot with the cover plate, thereby improving the efficiency of contact heat transfer from the heating device to the ceramic inner pot, and making the ceramic inner pot heated more evenly.

[0021] 2. As a preferred embodiment of the utility model, the support part has a first outer pot body located at the lower side of the cover plate, and a second outer pot body surrounding the outer periphery of the cover plate, a cavity is provided between the first outer pot body and the cover plate, and the cover plate contacts the support part for heat transfer. The second outer pot body directly contacts and transfers heat with the ceramic inner pot, and at least a part of the first outer pot body is recessed downward relative to the second outer pot body, so that there is a gap between the second outer pot body and the ceramic inner pot, so that the first outer pot body cannot contact and transfer heat with the ceramic inner pot, and can only transfer heat by heat radiation through the air in the gap, but the heat transfer efficiency of heat radiation is lower than that of contact heat transfer, so the heat in the central area of ​​the bottom of the ceramic inner pot is lower. In this embodiment, by covering the upper side of the first outer pot body with a cover plate, the cover plate covers the cavity formed by the recess of the first outer pot body, so when the ceramic inner pot is placed on the supporting platform, the central area of ​​the ceramic inner pot contacts the cover plate, and the outer area contacts the second outer pot body, and both the inside and the outside use contact heat transfer, thereby compensating for the defect of low heat transfer efficiency of heat radiation and ensuring uniform heat in the center and outside of the bottom of the ceramic inner pot. At the same time, the cover plate is in contact with the support portion, so that the heat of the support portion can be transferred to the cover plate, making the heat distribution of the cover plate and the support portion more uniform.

[0022] 3. As a preferred embodiment of the present invention, a through hole is provided in the central area of ​​the support portion, the cover plate is fixed to the support portion and covers the through hole, and the cover plate contacts the support portion to transfer heat. In this embodiment, the support portion is an annular structure with a through hole in the center. When the cover plate is installed, the through hole is closed so that the thickness of the cover plate supporting portion constitutes the wall thickness of the central area of ​​the supporting platform, which has the effect of reducing the wall thickness of the central area of ​​the supporting platform, thereby shortening the path for heat transfer from this area to the ceramic inner tank and improving the heat transfer efficiency.

[0023] 4. As a preferred embodiment of the present invention, the heating device is in contact with the cover plate and / or the support portion. In this embodiment, the cover plate is fixed to the support portion and in contact with the support portion, so that heat can be transferred between the cover plate and the support portion by contact heat transfer. In this way, the location of the heating device is more flexible, and the heating device can be arranged as needed. The heating device can be arranged below the support portion and in contact with the support portion so that it directly heats the support portion, and the heat is transferred to the cover plate through the support portion, so that the heat is evenly distributed on the supporting platform. The heating device can also be arranged below the cover plate and in contact with the cover plate so that it directly heats the cover plate, and the heat is transferred to the support portion through the cover plate, so that the heat distribution on the supporting platform is even. The heating device can also cover the cover plate and the support portion at the same time, so that the heat is directly transferred from the heating device to the cover plate and the support portion.

[0024] 5. As a preferred embodiment of the present invention, the support portion has a first outer pot body located at the lower side of the cover plate, and a second outer pot body surrounding the outer periphery of the cover plate, and the cover plate abuts against the first outer pot body. In this embodiment, the cover plate is stacked on the first outer pot body, so that the central area of ​​the supporting platform is a double-layer structure, which can effectively increase the thickness of the central area of ​​the supporting platform, improve the strength of the area, reduce the possibility of deformation or damage, and improve the wear resistance of the central area of ​​the supporting platform to reduce wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0026] Figure 1 This is a cross-sectional view of an electric stew pot according to an embodiment of the utility model;

[0027] Figure 2 for Figure 1 Magnified view of area A in the middle;

[0028] Figure 3 This is a schematic structural diagram of a cover plate in one embodiment of the utility model;

[0029] Figure 4 This is a schematic diagram of the structure of an electric stew pot according to an embodiment of the utility model, wherein the ceramic inner pot is not shown;

[0030] Figure 5 for Figure 4 Structural exploded view of the inner and outer pots and the cover plate;

[0031] Figure 6 It is a cross-sectional view of an electric stew pot in another embodiment of the utility model;

[0032] Figure 7 for Figure 6 Magnified view of area B;

[0033] Figure 8 for Figure 6 Structural exploded view of the inner and outer pots and cover plates.

[0034] in:

[0035] 1 outer pot; 11 supporting portion; 111 first outer pot body; 1111 contact portion; 1112 mounting sink; 112 second outer pot body; 113 cavity; 12 accommodating cavity; 13 card interface; 14 through hole; 15 accommodating sink;

[0036] 2Ceramic liner;

[0037] 3. Cover;

[0038] 4. Heating device;

[0039] 5. Heating element;

[0040] 6. Connectors;

[0041] 7 cover plate; 71 clamping rib position. DETAILED DESCRIPTION

[0042] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in the form of examples in conjunction with the accompanying drawings.

[0043] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0044] In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 cannot be understood as a limitation on the present invention.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" 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 the present invention can be understood according to specific circumstances.

[0046] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the 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 "implementation method", "example", "one embodiment", "example" or "specific example" 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 utility model. 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.

[0047] like Figure 1 , Figure 2 , Figure 6 , Figure 7 As shown, an electric stew pot comprises an outer pot 1 and a ceramic inner pot 2. The outer pot 1 encloses a receiving cavity 12 for placing the ceramic inner pot 2. Part of the bottom wall of the outer pot 1 bulges upward to form a supporting portion 11. A heating device 4 is arranged on the lower side of the supporting portion 11. The electric stew pot also comprises a cover plate 7 which is separately arranged relative to the supporting portion 11. The cover plate 7 is arranged in the central area of ​​the supporting portion 11. The cover plate 7 and the supporting portion 11 together constitute a supporting platform for supporting the ceramic inner pot 2.

[0048] It is understandable that if Figure 1 , Figure 6 As shown, the outer pot 1 is made of a heat-conducting material (such as metal, etc.), and its bottom wall is partially raised to form a support portion 11. The heating device 4 is arranged below the support portion 11, located outside the outer pot 1, and in contact with the support portion 11, and transfers heat to the support portion 11 by contact heat transfer. The ceramic inner pot 2 is placed on the support portion 11, and the bottom wall of the ceramic inner pot 2 is in contact with the support portion 11, so that the support portion 11 transfers heat to the ceramic inner pot 2.

[0049] The present invention does not limit the type of the heating device 4 , which may be a PTC heater, a heating patch, a heating wire, and the like.

[0050] Specifically, Figure 1 As shown, the bottom wall of the ceramic liner 2 is provided with a protrusion extending in the circumferential direction, which is used to cooperate with the outer edge of the support portion 11 to position the ceramic liner 2.

[0051] However, the temperature rise rate of the ceramic inner liner 2 is slow and the surface is uneven, so the contact effect between the ceramic inner liner 2 and the support part 11 cannot be guaranteed, resulting in uneven heat transfer from the support part 11 to various regions of the ceramic inner liner 2 .

[0052] In the utility model, the bottom wall of the outer pot 1 is provided with a support portion 11 that bulges upward, and the central area of ​​the support portion 11 is provided with a cover plate 7 that is separately provided with the support portion 11, so that the supporting platform for supporting the ceramic inner pot 2 is a split structure, and the cover plate 7 and the support portion 11 are split structures, so they can be processed and structurally designed separately, and then installed to the support portion 11. Therefore, the cover plate 7 can be stacked in the central area of ​​the support portion 11 to increase the thickness of the central area of ​​the supporting platform, thereby improving the strength of the area, reducing the possibility of deformation or damage, and improving the wear resistance of the central area of ​​the supporting platform and reducing wear. It is also possible to contact the ceramic inner pot 2 through the cover plate 7 to improve the contact effect, thereby improving the efficiency of the contact heat transfer from the heating device 4 to the ceramic inner pot 2, so that the ceramic inner pot 2 is heated more evenly.

[0053] In addition, the provision of the cover plate 7 can also serve as a decoration for the bottom of the outer pot 1, thereby improving the appearance quality of the bottom of the outer pot 1 and enhancing the user experience.

[0054] It should be noted that the present invention does not limit the structure of the support portion 11 and the assembly method of the cover plate 7 and the support portion 11, which can be one of the following embodiments:

[0055] Implementation method 1: In this implementation method, Figure 2 , Figure 4 As shown, the support portion 11 has a first outer pot body 111 located at the lower side of the cover plate 7, and a second outer pot body 112 surrounding the outer periphery of the cover plate 7. A cavity 113 is provided between the first outer pot body 111 and the cover plate 7, and the cover plate 7 contacts the support portion 11 for heat transfer.

[0056] Preferably, the upper surface of the cover plate 7 is substantially flush with the upper surface of the second outer pot body 112 to ensure contact between the cover plate 7 and the second outer pot body 112 and the bottom wall of the ceramic inner pot 2 .

[0057] The second outer pot body 112 is in direct contact with the ceramic inner pot 2 for heat transfer, and at least part of the first outer pot body 111 is recessed downward relative to the second outer pot body 112, so that there is a gap between the first outer pot body 111 and the ceramic inner pot 2, so that this part cannot be in contact with the ceramic inner pot 2 for heat transfer, and can only transfer heat by thermal radiation through the air in the gap. However, the heat transfer efficiency of thermal radiation is lower than that of contact heat transfer, so the heat in the bottom center area of ​​the ceramic inner pot 2 will be lower.

[0058] In this embodiment, by setting a cover plate 7 on the upper side of the first outer pot body 111, the cover plate 7 covers the cavity 113 formed by the depression of the first outer pot body 111. Therefore, when the ceramic inner pot 2 is placed on the supporting platform, the central area of ​​the ceramic inner pot 2 contacts the cover plate 7, and the outer area contacts the second outer pot body 112. Both the inner and outer sides use contact heat transfer, thereby compensating for the defect of low efficiency of heat radiation heat transfer and ensuring uniform heat at the bottom center and the outer side of the ceramic inner pot 2. At the same time, the cover plate 7 contacts the support part 11, so that the heat of the support part 11 can be transferred to the cover plate 7, so that the heat distribution of the cover plate 7 and the support part 11 is more uniform.

[0059] It should be noted that the present embodiment does not limit the structure of the first outer pot body 111. In one embodiment, the first outer pot body 111 as a whole is recessed downward relative to the second outer pot body 112, so that a large cavity 113 is formed between the cover plate 7 and the first outer pot body 111. In this embodiment, the cover plate 7 is in contact with the second outer pot body 112 and / or the first outer pot body 111, so that heat is transferred from the first outer pot body 111 and / or the second outer pot body 112 to the cover plate 7.

[0060] In a preferred embodiment, Figure 2 As shown, the electric stew pot also includes a cover shell 3 and a connecting member 6. The cover shell 3 is located on the outside of the outer pot 1. The connecting member 6 is used to connect the outer pot 1 and the cover shell 3. The first outer pot body 111 includes a contact portion 1111 and a mounting groove 1112. One end of the connecting member 6 extends into the mounting groove 1112. A cavity 113 is formed between the cover plate 7 and the mounting groove 1112. The cover plate 7 contacts the contact portion 1111 to transfer heat.

[0061] The connecting member 6 is a structure such as a bolt, and by tightening the connecting member 6, a downward pulling force is formed on the outer pot 1, so that the outer pot 1 is tightly fixed to the cover 3. The mounting groove 1112 can accommodate the end of the connecting member 6, such as the head of the bolt, or a nut matched with the bolt.

[0062] In this embodiment, the cover plate 7 is in contact with the contact portion 1111 of the first outer pot body 111, and a cavity 113 is formed between the cover plate 7 and the mounting groove 1112. Therefore, the problem of low heat transfer efficiency in the cavity 113 can be compensated. At the same time, preferably, the cover plate 7 is in contact with the contact portion 1111 of the second outer pot body 112 and the first outer pot body 111 at the same time, so that heat can be transferred to the cover plate 7 through the second outer pot body 112 and the contact portion 1111, which increases the heat source of the cover plate 7, helps the cover plate 7 to quickly rise in temperature, and further improves the heat transfer efficiency between the cover plate 7 and the ceramic inner pot 2.

[0063] Preferably, one end of the connecting member 6 is fixed to the cover plate 7 , so that the cover plate 7 can abut against the contact portion 1111 under the pulling force of the connecting member 6 .

[0064] In this embodiment, the upper end of the connecting member 6 is fixed to the cover plate 7, so that the tension of the connecting member 6 can act on the cover plate 7, thereby pulling the cover plate 7 downward and tightly pressing it on the contact portion 1111 or the second outer pot body 112, which not only realizes the integral installation of the connecting member 6 and the cover plate 7, simplifies the assembly steps, and improves the fixing stability of the cover plate 7. In addition, it can also form an extrusion force between the cover plate 7 and the support portion 11, improve the contact effect between the two, and thus improve the heat transfer efficiency.

[0065] In this embodiment, the heating device 4 is arranged below the support portion 11 and in contact with the support portion 11, so the heat transfer route is: the heat of the heating device 4 is transferred to the support portion 11 through contact, and part of the heat of the support portion 11 is transferred to the cover plate 7 through contact, so that the heat is distributed on the support portion 11 and the cover plate 7, and then contacts the ceramic inner liner 2 to heat the ceramic inner liner 2.

[0066] In this embodiment, at least part of the first outer pot body 111 is recessed, so it cannot be in direct contact with the ceramic liner 2, so that radiation heat transfer is performed in this area. By adding a cover plate 7, the cover plate 7 fills the groove in this area, so that the cover plate 7 and the support portion 11 are in contact with the ceramic liner 2 together, so that the center and the outside of the ceramic liner 2 are both contacted. Heat transfer. Therefore, this embodiment does not limit the material of the cover plate 7, and it can be made of the same material as the support portion 11, such as aluminum, stainless steel, etc. It is also possible to use a material with a higher heat transfer coefficient than the support portion 11, for example, the support portion 11 is made of aluminum and the cover plate 7 is copper, so as to improve the heat transfer efficiency at the center of the supporting platform. Of course, it is also possible to use a material with a lower heat transfer coefficient than the support portion 11. As long as its heat transfer coefficient is higher than that of air, the heat transfer efficiency of the central area can be improved, which is not limited here.

[0067] Implementation method 2: In this implementation method, Figure 6 , Figure 7 , Figure 8 As shown, a through hole 14 is provided in the central area of ​​the support portion 11 , and the cover plate 7 is fixed to the support portion 11 and covers the through hole 14 , and the cover plate 7 is in contact with the support portion 11 for heat transfer.

[0068] In this embodiment, the support portion 11 is an annular structure with a through hole 14 at the center, and the cover plate 7 is covered on the through hole 14. In the above-mentioned embodiment 1, the wall thickness at the center of the supporting platform is the sum of the wall thickness of the supporting portion of the cover plate 7 and the wall thickness of the first outer pot body 111, while in this embodiment, the wall thickness of the central area of ​​the supporting platform is only the thickness of the supporting portion of the cover plate 7, so that compared with the embodiment 1, the wall thickness of the central area of ​​the supporting platform can be reduced, thereby shortening the path for heat transfer from this area to the ceramic inner pot 2, and improving the heat transfer efficiency.

[0069] In this embodiment, the cover plate 7 is fixed to the support portion 11 and is in contact with the support portion 11, so that heat can be transferred between the cover plate 7 and the support portion 11 by contact heat transfer. In this way, the setting position of the heating device 4 is more flexible, and the heating device 4 can be arranged as needed. The heating device 4 can be set below the support portion 11 and in contact with the support portion 11, so that it directly heats the support portion 11, and the heat is transferred to the cover plate 7 through the support portion 11, so that the heat is evenly distributed on the supporting platform. The heating device 4 can also be set below the cover plate 7 and in contact with the cover plate 7, so that it directly heats the cover plate 7, and the heat is transferred to the support portion 11 through the cover plate 7, so that the heat distribution of the supporting platform is uniform. The heating device 4 can also cover the cover plate 7 and the support portion 11 at the same time, so that the heat is directly transferred from the heating device 4 to the cover plate 7 and the support portion 11.

[0070] Preferably, the cover plate 7 is made of a material with a higher heat transfer coefficient than the support part 11, for example, the support part 11 is made of aluminum and the cover plate 7 is made of copper, so as to improve the heat transfer efficiency at the center of the supporting platform, increase the heat transferred from the central area of ​​the supporting platform to the ceramic inner liner 2, and improve the heating uniformity of the ceramic inner liner 2.

[0071] Embodiment 3: In this embodiment, the support portion 11 has a first outer pot body 111 located at the lower side of the cover plate 7 , and a second outer pot body 112 surrounding the outer periphery of the cover plate 7 , and the cover plate 7 abuts against the first outer pot body 111 .

[0072] In this embodiment, the cover plate 7 is stacked on the first outer pot body 111, so that the central area of ​​the supporting platform has a double-layer structure, which can effectively increase the thickness of the central area of ​​the supporting platform, improve the strength of the area, reduce the possibility of deformation or damage, and improve the wear resistance of the central area of ​​the supporting platform to reduce wear.

[0073] Preferably, if Figure 7 As shown, a receiving groove 15 is provided in the central area of ​​the support portion 11 , and the cover plate 7 is fixed in the receiving groove 15 .

[0074] The accommodating groove 15 is sunken compared to other areas of the support portion 11, so that after the cover plate 7 is assembled, a partial area of ​​the cover plate 7 is accommodated, so that the position of the cover plate 7 is moved downward, and the upper surface of the cover plate 7 is flush with the upper surface of the support portion 11, thereby improving the flatness of the supporting surface of the supporting platform, which not only improves the stability of the support for the ceramic liner 2, but also ensures the contact effect with each area of ​​the bottom of the ceramic liner 2, thereby ensuring the heat transfer efficiency.

[0075] Specifically, Figure 3 , Figure 5As shown, the cover plate 7 is provided with a snap-fitting rib 71 protruding downward, and the support portion 11 is provided with a snap-fitting interface 13 corresponding to the snap-fitting rib 71, and the cover plate 7 is fixed by buckling the snap-fitting rib 71 and the snap-fitting interface 13. Preferably, there are multiple snap-fitting ribs 71 and they are evenly spaced along the circumference of the cover plate 7, and the snap-fitting interface 13 is correspondingly provided to make the cover plate 7 more stable after being fixed and avoid tilting.

[0076] In the embodiment where the through hole 14 is provided at the center of the support portion 11 , the matching structure for matching with the snap-fit ​​rib 71 may also be provided at the edge of the through hole 14 , which is not limited here.

[0077] It should be noted that the present invention does not limit the surface structure of the support portion 11 and the cover plate 7. In one embodiment, the surfaces of the support portion 11 and the cover plate 7 are both flat planes to increase the contact area between the supporting platform and the ceramic liner 2 and improve the heat transfer efficiency. In another embodiment, the surface of the support portion 11 and / or the cover plate 7 is provided with textures, for example, by providing protrusions or grooves so that the surface of the supporting plane is an uneven curved surface, thereby improving the strength and reducing the wear between the ceramic liner 2. Specifically, the surface of the support portion 11 can be provided with textures, and the surface of the cover plate 7 is flat, or the surface of the cover plate 7 can be provided with textures, and the surface of the support portion 11 is flat, or the surfaces of the cover plate 7 and the support portion 11 are both provided with textures.

[0078] Preferably, if Figure 1 , Figure 6 As shown, a heating element 5 is further provided on the side wall of the outer pot 1 , and the projection of the heating element 5 toward the ceramic inner pot 2 is located on the side wall of the ceramic inner pot 2 .

[0079] During the cooking process of the electric stew pot of the present invention, the heating device 4 located at the bottom of the outer pot 1 and the heating element 5 located at the side of the outer pot 1 are started together, and the bottom and the side of the ceramic inner pot 2 are heated at the same time, thereby improving the heating efficiency and improving the uniformity of heat distribution at the bottom and the side of the ceramic inner pot 2, so that the ceramic inner pot 2 is evenly heated.

[0080] The heating device 4 is in contact with the support portion 11, and the ceramic inner pot 2 is also in contact with the support portion 11, and the heat of the heating device 4 is transferred to the ceramic inner pot 2 through the support portion 11 by contact heat transfer. The heating element 5 is located on the side wall of the outer pot 1, and there is a gap between the ceramic inner pot 2 and the side wall of the outer pot 1, so the heat of the heating element 5 is first transferred to the side wall of the outer pot 1, and then transferred to the ceramic inner pot 2 by heat radiation into the accommodating cavity 12.

[0081] The parts not described in the present invention can be realized by adopting or drawing on the existing technology.

[0082] 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.

[0083] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. An electric stew pot, comprising an outer pot and a ceramic inner pot, wherein the outer pot forms a receiving cavity for placing the ceramic inner pot, characterized in that: A partial area of ​​the bottom wall of the outer pot bulges upward to form a supporting portion, a heating device is arranged on the lower side of the supporting portion, the electric stew pot also includes a cover plate arranged separately relative to the supporting portion, the cover plate is arranged in the central area of ​​the supporting portion, and the cover plate and the supporting portion together constitute a supporting platform for supporting the ceramic inner pot.

2. The electric stew pot according to claim 1, characterized in that: The support part has a first outer pot body located at the lower side of the cover plate, and a second outer pot body surrounding the outer periphery of the cover plate. A cavity is provided between the first outer pot body and the cover plate. The cover plate contacts the support part for heat transfer.

3. The electric stew pot according to claim 2, characterized in that: The electric stew pot also includes a cover shell and a connecting piece, wherein the cover shell is located on the outside of the outer pot, and the connecting piece is used to connect the outer pot and the cover shell. The first outer pot body includes a contact portion and an installation groove, one end of the connecting piece extends into the installation groove, and the cavity is formed between the cover plate and the installation groove, and the cover plate contacts the contact portion to transfer heat.

4. The electric stew pot according to claim 3, characterized in that: One end of the connecting member is fixed to the cover plate, so that the cover plate can abut against the contact portion under the pulling force of the connecting member.

5. The electric stew pot according to claim 1, characterized in that: A through hole is arranged in the central area of ​​the support part, the cover plate is fixed to the support part and covers the through hole, and the cover plate contacts the support part to transfer heat.

6. The electric stew pot according to claim 5, characterized in that: The heat transfer coefficient of the cover plate is greater than the heat transfer coefficient of the support portion.

7. The electric stew pot according to claim 5, characterized in that: The heating device is in contact with the cover plate and / or the support portion.

8. The electric stew pot according to claim 1, characterized in that: The support portion comprises a first outer pot body located at the lower side of the cover plate, and a second outer pot body surrounding the outer periphery of the cover plate, and the cover plate abuts against the first outer pot body.

9. The electric stew pot according to claim 1, characterized in that: The central area of ​​the support portion is provided with an accommodating groove, and the cover plate is fixed in the accommodating groove.

10. The electric stew pot according to any one of claims 1 to 9, characterized in that: The side wall of the outer pot is also provided with a heating element, and the projection of the heating element toward the ceramic inner pot is located on the side wall of the ceramic inner pot.

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