Cooking appliance

Abstract

The utility model provides a kind of cooking utensil, comprising: pot body, the outer bottom wall of pot body includes first arc surface part;Heating disc, is located at the bottom of pot body, heating disc includes second arc surface part towards the side of pot body, second arc surface part is oppositely arranged with first arc surface part, and second arc surface part is compatible with first arc surface part;Temperature controller, is located in the middle of heating disc;First arc surface part and second arc surface part are contacted in target position along circumference, target position separates first arc surface part and second arc surface part into first arc surface area located in inside and second arc surface area located in outside, and second arc surface area surrounds around first arc surface area;Wherein, in second arc surface area, first arc surface part and second arc surface part are at least partially spaced apart;In first arc surface area, first arc surface part and second arc surface part are at least partially spaced apart.The utility model provides cooking utensil, improves the conduction efficiency of heat to pot body, and further improves the energy efficiency of cooking utensil.

Description

Technical Field

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

[0002] Currently, the heating plate includes an upward-arched plate surface, with the center of the plate surface located below the heating plate. The bottom of the pot body also has an arc-shaped structure for contact and cooperation with the plate surface of the heating plate to achieve heat transfer.

[0003] In related technologies, some solutions set the radius of curvature of the pot body's curved surface to be the same as that of the heating plate. However, due to manufacturing tolerances, the pot body may come into contact with the inner ring of the heating plate. Since the thermostat is located at the through-hole in the inner ring of the heating plate, heat will preferentially transfer from the inner ring of the heating plate to the pot body, affecting the detection accuracy of the thermostat and thus the cooking effect. Other solutions design the radius of curvature of the heating plate surface to be larger than the radius of curvature of the bottom of the pot body to cover manufacturing tolerances. However, this setting causes the contact point between the heating plate and the pot body to occur at the outer edge of the heating plate, with the gap distance at other locations gradually increasing towards the inner ring of the heating plate, forming an air insulation layer. This increases the thermal resistance between the heating plate and the pot body, affecting the uniformity of the temperature field in the cooking cavity and hindering effective heat transfer to the pot body, thus reducing heat transfer efficiency. If the difference between the radii of curvature of the pot body and the heating plate is reduced, the pot body will again come into contact with the inner ring of the heating plate. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, this utility model provides a cooking utensil.

[0006] In view of this, the present invention proposes a cooking utensil, comprising: a pot body, the outer bottom wall of which includes a first arcuate surface; a heating plate disposed at the bottom of the pot body, the side of the heating plate facing the pot body including a second arcuate surface, the second arcuate surface being opposite to and adapted to the first arcuate surface; a thermostat disposed in the middle of the heating plate; the first arcuate surface and the second arcuate surface contacting each other circumferentially at a target position, the target position dividing the first arcuate surface and the second arcuate surface into an inner first arcuate area and an outer second arcuate area, the second arcuate area surrounding the first arcuate area; wherein, within the second arcuate area, the first arcuate surface and the second arcuate surface are at least partially spaced apart; within the first arcuate area, the first arcuate surface and the second arcuate surface are at least partially spaced apart.

[0007] The cooking appliance provided by this utility model includes a pot body and a heating plate. The outer bottom wall of the pot body includes a first arc-shaped surface, and the heating plate has a second arc-shaped surface adapted to the side facing the pot body. The first and second arc-shaped surfaces are arranged opposite to each other and contact each other circumferentially at a target position. This target position divides the opposing first and second arc-shaped surfaces into an inner first arc-shaped area and an outer second arc-shaped area. Within the second arc-shaped area, the first and second arc-shaped surfaces are at least partially spaced apart, creating a gap between the pot body and the heating plate. This shifts the contact position between the pot body and the heating plate from the edge area in related technologies to the center of the pot body, reducing the radial width of the air insulation layer between the central area of ​​the pot body and the heating plate, lowering the resistance to heat transfer, improving the efficiency of heat conduction into the pot body, and thus improving the energy efficiency of the cooking appliance. Meanwhile, the first and second arc surfaces corresponding to the first arc surface area are at least partially spaced apart, so that there is a certain gap between the pot body and the heating plate in the part corresponding to the first arc surface area, avoiding contact between the pot body and the heating plate in the inner ring of the heating plate, thereby keeping the contact position between the pot body and the heating plate away from the thermostat, avoiding affecting the detection results of the thermostat, and thus ensuring reliable control of the cooking process.

[0008] In some embodiments, optionally, the first and second arc surfaces corresponding to the first arc surface region both arch towards the inside of the pot, or the first arc surface protrudes towards the heating plate and the second arc surface is recessed away from the pot; the first and second arc surfaces corresponding to the second arc surface region both arch towards the inside of the pot, or the first arc surface protrudes towards the heating plate and the second arc surface is recessed away from the pot.

[0009] In this embodiment, the first and second arc-shaped surfaces can be either convex or concave. Optionally, both the first and second arc-shaped surfaces corresponding to the first arc-shaped surface area are arched into the pot, making the heating plate convex in the first arc-shaped surface area. Alternatively, the first arc-shaped surface corresponding to the first arc-shaped surface area convexes towards the heating plate, while the second arc-shaped surface is concave away from the pot, making the heating plate concave in the first arc-shaped surface area. Similarly, both the first and second arc-shaped surfaces corresponding to the second arc-shaped surface area are arched into the pot, making the heating plate convex in the second arc-shaped surface area. Alternatively, the first arc-shaped surface corresponding to the second arc-shaped surface area convexes towards the heating plate, while the second arc-shaped surface is concave away from the pot, making the heating plate concave in the second arc-shaped surface area.

[0010] In some embodiments, optionally, the radius of curvature of the first arcuate surface is a first radius of curvature, and the radius of curvature of the second arcuate surface is a second radius of curvature; when both the first and second arcuate surfaces corresponding to the first arcuate surface area arch towards the pot body, the second radius of curvature corresponding to the first arcuate surface area is greater than the first radius of curvature; when the first arcuate surface area corresponding to the first arcuate surface area protrudes towards the heating plate, and the second arcuate surface area is recessed away from the pot body, the second radius of curvature corresponding to the first arcuate surface area is smaller than the first radius of curvature; when both the first and second arcuate surfaces corresponding to the second arcuate surface area arch towards the pot body, the second radius of curvature corresponding to the second arcuate surface area is smaller than the first radius of curvature; when the first arcuate surface area corresponding to the second arcuate surface area protrudes towards the heating plate, and the second arcuate surface area is recessed away from the pot body, the second radius of curvature corresponding to the second arcuate surface area is greater than the first radius of curvature.

[0011] In this embodiment, the radius of curvature of the first arc surface is the first radius of curvature, and the radius of curvature of the second arc surface is the second radius of curvature. It can be understood that the larger the radius of curvature, the smoother the arc surface, and the smaller the radius of curvature, the more curved the arc surface.

[0012] When both the first and second curved surfaces of the first curved surface area arch towards the inside of the pot: the second radius of curvature of the first curved surface area is greater than the first radius of curvature, that is, the radius of curvature of the second curved surface of the first curved surface area is greater than the radius of curvature of the first curved surface area. This makes the second curved surface of the first curved surface area more gentle than the first curved surface area, and the first curved surface area more curved than the second curved surface area. This allows the first curved surface area to be further away from the second curved surface area. In other words, this setting can ensure that there is a gap between the first and second curved surfaces within the first curved surface area, avoiding contact between the pot body and the heating plate in the first curved surface area. This also prevents the contact position between the pot body and the heating plate from being too close to the thermostat in the middle of the heating plate, thus ensuring the control of the pot body temperature.

[0013] When the first arc-shaped surface corresponding to the first arc-shaped area protrudes towards the heating plate, and the second arc-shaped surface is concave away from the pot body: the second radius of curvature is smaller than the first radius of curvature, that is, the radius of curvature of the first arc-shaped surface corresponding to the first arc-shaped area is larger than the radius of curvature of the second arc-shaped surface. This makes the first arc-shaped surface corresponding to the first arc-shaped area flatter than the second arc-shaped surface, and the second arc-shaped surface more curved than the first arc-shaped surface. This allows the second arc-shaped surface to move away from the first arc-shaped surface. In other words, this arrangement ensures that there is a gap between the first arc-shaped surface and the second arc-shaped surface within the first arc-shaped area, preventing the pot body and the heating plate from contacting each other in the first arc-shaped area. This also prevents the contact position between the pot body and the heating plate from being too close to the thermostat in the middle of the heating plate, thus ensuring the control of the pot body temperature.

[0014] When both the first and second curved surfaces corresponding to the second curved surface area arch towards the inside of the pot: the second radius of curvature corresponding to the second curved surface area is smaller than the first radius of curvature, resulting in a greater curvature of the second curved surface area corresponding to the second curved surface area and a gentler first curved surface area corresponding to the second curved surface area. Consequently, the second curved surface area corresponding to the second curved surface area gradually moves away from the pot body from the inner edge to the outer edge, thus avoiding contact between the pot body and the heating plate in the space corresponding to the second curved surface area. This prevents the contact position between the pot body and the heating plate from being too close to the outer edge of the heating plate, which could lead to poor heat transfer.

[0015] When the first arc surface corresponding to the second arc surface area protrudes towards the heating plate, and the second arc surface area is concave away from the pot body: the second radius of curvature corresponding to the second arc surface area is greater than the first radius of curvature, making the curvature of the first arc surface area corresponding to the second arc surface area greater and the second arc surface area corresponding to the second arc surface area more gentle. As a result, the first arc surface area corresponding to the second arc surface area gradually moves away from the heating plate from the inner edge to the outer edge, so as to avoid the pot body and the heating plate from contacting each other in the space corresponding to the second arc surface area. This avoids the situation where the contact position between the pot body and the heating plate is too close to the outer edge of the heating plate, resulting in poor heat transfer.

[0016] In some embodiments, optionally, in the first and second arcuate surfaces corresponding to the second arcuate surface region: the difference between the first radius of curvature and the second radius of curvature is greater than or equal to 10 mm and less than or equal to 400 mm; and / or in the first and second arcuate surfaces corresponding to the first arcuate surface region: the difference between the first radius of curvature and the second radius of curvature is greater than or equal to 10 mm and less than or equal to 400 mm.

[0017] In this embodiment, if the difference between the first and second radii of curvature is too small, deformation of the heating plate and pot body after repeated use, or the influence of manufacturing tolerances, can easily lead to the radii of curvature of the first and second arc-shaped surfaces becoming similar. This causes the outer edge of the second arc-shaped surface to approach the pot body, making it easy for the pot body to come into contact with the heating plate near the outer edge of the second arc-shaped area. Consequently, a large air layer forms between the outer edge of the pot body in the second arc-shaped area and the center of the heating plate, affecting the heat transfer effect from the heating plate to the pot body. Therefore, designing the difference between the first and second radii of curvature to be greater than or equal to 10mm can shorten the heat transfer distance between the heating element and the pot body, thereby ensuring the heat transfer efficiency of the heating element. Meanwhile, if the difference between the first and second radii of curvature is too large, it can easily lead to excessive vertical space occupation by the heating plate or pot body, affecting the overall height of the cooking appliance or the volume of the pot body.

[0018] In some embodiments, optionally, when both the first and second arcuate surfaces bulge towards the interior of the pot: the first radius of curvature corresponding to the first arcuate surface is greater than or equal to 500 mm and less than or equal to 900 mm, and the second radius of curvature is greater than or equal to 500 mm and less than or equal to 900 mm; the first radius of curvature corresponding to the second arcuate surface is greater than or equal to 500 mm and less than or equal to 900 mm, and the second radius of curvature is greater than or equal to 500 mm and less than or equal to 900 mm; when the first arcuate surface bulges towards the heating plate and the second arcuate surface is concave away from the pot: the first radius of curvature corresponding to the first arcuate surface is greater than or equal to 50 mm and less than or equal to 900 mm, and the second radius of curvature is greater than or equal to 50 mm and less than or equal to 900 mm; the first radius of curvature corresponding to the second arcuate surface is greater than or equal to 50 mm and less than or equal to 900 mm, and the second radius of curvature is greater than or equal to 50 mm and less than or equal to 900 mm.

[0019] In this embodiment, if the first and second radii of curvature are too large, the surface of the heating plate will be too flat, affecting the compatibility between the heating plate and the pot. If the first and second radii of curvature are too small, the heating plate will arch too high, affecting the space occupied in the height direction of the cooking appliance. Therefore, when both the first and second curved surfaces arch towards the pot: the first radius of curvature is set to be greater than or equal to 500 mm and less than or equal to 900 mm, and the second radius of curvature is greater than or equal to 500 mm and less than or equal to 900 mm. When the first curved surface bulges towards the heating plate and the second curved surface is concave away from the pot: the first radius of curvature is set to be greater than or equal to 50 mm and less than or equal to 900 mm, and the second radius of curvature is set to be greater than or equal to 50 mm and less than or equal to 900 mm. This ensures both the compatibility between the heating plate and the pot and prevents the heating plate from arching too high, thus guaranteeing the strength of the heating plate.

[0020] In some embodiments, optionally, both the first arc surface area and the second arc surface area are arranged in a ring shape, and the gap distance between the first arc surface area and the second arc surface area corresponding to the outer edge of the second arc surface area is greater than or equal to 0.04 mm and less than or equal to 30 mm; wherein, the gap distance between the first arc surface area and the second arc surface area corresponding to the inner edge of the first arc surface area is greater than or equal to 0.04 mm and less than or equal to 30 mm.

[0021] In this embodiment, if the gap between the first and second arc-shaped surfaces corresponding to the outer edge of the second arc-shaped surface is too large, heat loss will easily occur. If the gap between the first and second arc-shaped surfaces corresponding to the outer edge of the second arc-shaped surface is too small, the pot body and the heating plate will easily come into contact in the second arc-shaped surface. Therefore, setting the gap between the first and second arc-shaped surfaces corresponding to the outer edge of the second arc-shaped surface between 0.04 mm and 30 mm can ensure that the pot body and the heating plate have a reliable gap in the second arc-shaped surface and can reduce heat loss.

[0022] In some embodiments, optionally, when both the first arcuate surface and the second arcuate surface arch towards the inside of the pot: a third arcuate surface region is also constructed between the first arcuate surface and the second arcuate surface region, the third arcuate surface region surrounding the periphery of the second arcuate surface region; the first arcuate surface region corresponding to the third arcuate surface region protrudes outward from the pot body, the second arcuate surface region is recessed in the direction away from the pot body, and the first arcuate surface region and the second arcuate surface region corresponding to the third arcuate surface region are spaced apart.

[0023] In this embodiment, a third arcuate region is constructed between the first and second arcuate surfaces. The third arcuate region surrounds the periphery of the second arcuate region, and the first arcuate surface corresponding to the third arcuate region arches outwards from the pot body, while the second arcuate surface corresponding to the third arcuate region is recessed in the direction away from the pot body. This provides a positioning effect for the third arcuate region, ensuring reliable assembly of the pot body and the heating plate. The first and second arcuate surfaces corresponding to the third arcuate region are spaced apart to prevent the pot body and the heating plate from contacting each other at the target location within the third arcuate region, thereby ensuring efficient heat transfer.

[0024] In some embodiments, optionally, the gap distance between the first arcuate surface and the second arcuate surface corresponding to the outer edge of the third arcuate surface region is greater than or equal to 0.04 mm and less than or equal to 30 mm; the gap distance between the first arcuate surface and the second arcuate surface corresponding to the outer edge of the second arcuate surface region is greater than or equal to 0.04 mm and less than or equal to 0.2 mm; and / or the first arcuate surface corresponding to the second arcuate surface region is connected to the first arcuate surface corresponding to the third arcuate surface region, and the second arcuate surface corresponding to the second arcuate surface region is connected to the second arcuate surface corresponding to the third arcuate surface region; the first radius of curvature corresponding to the third arcuate surface region is greater than or equal to 5 mm and less than or equal to 50 mm; and the second radius of curvature corresponding to the third arcuate surface region is greater than or equal to 5 mm and less than or equal to 50 mm.

[0025] In this embodiment, if the gap between the first and second curved surfaces corresponding to the outer edge of the third curved surface area is too large, heat loss will easily occur. If the gap between the first and second curved surfaces corresponding to the outer edge of the third curved surface area is too small, the pot body and the heating plate will easily come into contact in the third curved surface area. Therefore, setting the gap between the first and second curved surfaces corresponding to the outer edge of the third curved surface area between 0.04mm and 30mm ensures a reliable gap between the pot body and the heating plate in the third curved surface area and reduces heat loss. Simultaneously, setting the gap between the first and second curved surfaces corresponding to the outer edge of the second curved surface area between 0.04mm and 0.2mm ensures that the pot body and the heating plate do not come into contact in the second curved surface area. Optionally, the first arc-shaped portion corresponding to the second arc-shaped area is connected to the first arc-shaped portion corresponding to the third arc-shaped area, and the second arc-shaped portion corresponding to the second arc-shaped area is connected to the second arc-shaped portion corresponding to the third arc-shaped area. This allows the first arc-shaped portion to continuously extend from the second arc-shaped area to the third arc-shaped area, and the second arc-shaped portion to continuously extend from the second arc-shaped area to the third arc-shaped area. This improves the continuity of the outer bottom wall of the pot body, thereby ensuring that there are gaps between the pot body and the heating plate in both the second and third arc-shaped areas. Optionally, the first radius of curvature of the first arc-shaped portion corresponding to the third arc-shaped area and the second radius of curvature of the second arc-shaped portion are within the range of 5mm to 50mm, so that the curvature of the first and second arc-shaped portions of the third arc-shaped area is slightly larger, thus achieving a preliminary positioning effect on the pot body.

[0026] In some embodiments, optionally, the first arcuate surface and the second arcuate surface are in annular line contact at the target location; or the first arcuate surface and the second arcuate surface are in annular surface contact at the target location, wherein the first radius of curvature of the first arcuate surface at the target location is the same as the second radius of curvature of the second arcuate surface.

[0027] In this embodiment, the first and second arc-shaped surfaces can make line contact at the target location, forming a ring-shaped contact. Alternatively, they can make surface contact at the target location, forming a ring-shaped contact to increase the contact area between the pot and the heating plate. When the first and second arc-shaped surfaces make ring-shaped surface contact at the target location, the first radius of curvature of the first arc-shaped surface is the same as the second radius of curvature of the second arc-shaped surface, ensuring that the first and second arc-shaped surfaces fit together at the target location.

[0028] In some embodiments, the heating plate may optionally include a heating element for heating the pot body, the heating element being at least partially disposed opposite to the target position.

[0029] In this embodiment, the heating plate also includes a heating element, which, when turned on, can transfer heat to the pot body to cook the food inside. The heating element is at least partially positioned opposite the target location, meaning at least part of the heating element is positioned opposite the contact point between the pot body and the heating plate. This shortens the path for heat transfer from the heating element to the pot body, thereby improving the heating efficiency of the heating plate and the energy efficiency of the cooking appliance.

[0030] In some embodiments, optionally, when the first arcuate surface and the second arcuate surface are in annular contact at the target location, the target location is an annular arcuate surface, and in the projection along the vertical direction of the cooking appliance, the annular arcuate surface covers at least a portion of the heating tube.

[0031] In this embodiment, the target position is an annular arc surface, so that the first arc surface and the second arc surface are in surface contact at the target position, which increases the contact area between the pot body and the heating plate. At the same time, the orthographic projection of the annular arc surface covers at least a part of the heating tube, so that at least a part of the heating tube is arranged opposite to the annular arc surface. Thus, the heat generated by the heating tube can be directly transferred upward to the pot body through the heating plate, shortening the heat transfer distance between the heating tube and the pot body, improving the heat transfer efficiency and the energy efficiency of the cooking appliance.

[0032] In some embodiments, optionally, with the center of the heating plate as the point of origin: the diameter of the circle containing the geometric center of the heating tube is the first diameter, and the ratio of the first diameter to the diameter of the heating plate is the first ratio; when the first arcuate surface and the second arcuate surface are in annular contact at the target position, the diameter of the circle containing the target position is the second diameter, and the ratio of the second diameter to the diameter of the heating plate is the second ratio; when the first arcuate surface and the second arcuate surface are in annular contact at the target position: the target position is an annular arcuate surface, the diameter of the circle containing the inner edge of the annular arcuate surface is the third diameter, the diameter of the circle containing the outer edge of the annular arcuate surface is the fourth diameter, the ratio of the third diameter to the diameter of the heating plate is the third ratio, and the ratio of the fourth diameter to the diameter of the heating plate is the fourth ratio; wherein, the first ratio is greater than or equal to 0.4 and less than or equal to 1, the second ratio is greater than or equal to 0.2 and less than or equal to 0.8, the third ratio is greater than or equal to 0.4 and less than or equal to 0.6, and the fourth ratio is greater than or equal to 0.6 and less than or equal to 0.9.

[0033] In this embodiment, the distance between the heating element and the target position affects the heat transfer distance from the heating plate to the pot body. When the first and second arc-shaped surfaces are in annular contact at the target position: the first ratio corresponding to the heating element is greater than or equal to 0.4 and less than or equal to 1, and the second ratio corresponding to the target position is greater than or equal to 0.2 and less than or equal to 0.8, limiting the distance between the heating element and the target position, making them closer and thus shortening the heat transfer distance. When the first and second arc-shaped surfaces are in annular contact at the target position: the third ratio is greater than or equal to 0.4 and less than or equal to 0.6, the fourth ratio is greater than or equal to 0.6 and less than or equal to 0.9, and the first ratio is greater than or equal to 0.4 and less than or equal to 1, ensuring the distance between the heating element and the target position, thus shortening the heat transfer distance.

[0034] In some embodiments, optionally, the third ratio is less than the first ratio, and the first ratio is greater than the fourth ratio.

[0035] In this embodiment, the third ratio is less than the first ratio, and the first ratio is greater than the fourth ratio, so that the heating tube is located in the area of ​​the annular arc surface, thereby shortening the heat transfer path between the heating tube and the pot body and improving the heat transfer efficiency.

[0036] In some embodiments, optionally, when both the first and second arcuate surfaces bulge towards the interior of the pot: the first and second radii of curvature corresponding to the annular arcuate surfaces are both greater than or equal to 500 mm and less than or equal to 900 mm; when the first arcuate surface bulges towards the heating plate and the second arcuate surface is recessed away from the pot: the first and second radii of curvature corresponding to the annular arcuate surfaces are both greater than or equal to 50 mm and less than or equal to 900 mm.

[0037] In this embodiment, the first and second radii of curvature corresponding to the annular arc surface area are set to ensure the compatibility between the heating plate and the pot body, and to prevent the heating plate from arching too high, thus ensuring the strength of the heating plate.

[0038] In some embodiments, optionally, when the heating power of the heating plate is greater than or equal to 300W and less than or equal to 450W, the diameter of the heating plate is greater than or equal to 100mm and less than or equal to 160mm; when the heating power of the heating plate is greater than or equal to 450W and less than or equal to 680W, the diameter of the heating plate is greater than or equal to 120mm and less than or equal to 180mm; when the heating power of the heating plate is greater than or equal to 680W and less than or equal to 1200W, the diameter of the heating plate is greater than or equal to 150mm and less than or equal to 220mm.

[0039] In this embodiment, the heating plate can have different power types. Different heating power corresponds to different heating plate diameters, with higher heating power resulting in larger diameters. Optionally, when the heating power is greater than or equal to 300W and less than or equal to 450W, the heating plate diameter can be set to greater than or equal to 100mm and less than or equal to 160mm; or when the heating power is greater than or equal to 450W and less than or equal to 680W, the heating plate diameter can be set to greater than or equal to 120mm and less than or equal to 180mm; or when the heating power is greater than or equal to 680W and less than or equal to 1200W, the heating plate diameter can be set to greater than or equal to 150mm and less than or equal to 220mm, and so on.

[0040] In some embodiments, the cooking appliance may optionally include: a housing, a pot body and a heating plate all disposed within the housing; and / or the cooking appliance includes any one of a rice cooker, an electric pressure cooker, and an electric slow cooker.

[0041] In this embodiment, both the pot body and the heating plate are housed within the casing, which reduces heat loss. Optionally, the cooking appliance can be any one of a rice cooker, an electric pressure cooker, or an electric slow cooker.

[0042] Additional aspects and advantages of this invention will become apparent in the description that follows, or may be learned by practice of this invention. Attached Figure Description

[0043] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0044] Figure 1 One of the structural schematic diagrams of a cooking appliance according to an embodiment of the present invention is shown;

[0045] Figure 2 Show Figure 1 An enlarged structural diagram of point A in the illustrated embodiment;

[0046] Figure 3 Show Figure 1 An enlarged structural schematic diagram of point B in the illustrated embodiment;

[0047] Figure 4 Show Figure 1 An enlarged structural diagram of point C in the illustrated embodiment;

[0048] Figure 5 One of the structural schematic diagrams of the heating plate according to an embodiment of the present invention is shown;

[0049] Figure 6A second schematic diagram of the structure of the heating plate according to an embodiment of the present invention is shown;

[0050] Figure 7 The third schematic diagram shows the structure of the heating plate according to an embodiment of the present invention;

[0051] Figure 8 The fourth schematic diagram shows the structure of the heating plate according to an embodiment of the present invention;

[0052] Figure 9 The fifth schematic diagram shows the structure of the heating plate according to an embodiment of the present invention;

[0053] Figure 10 The sixth schematic diagram shows the structure of the heating plate according to an embodiment of the present invention;

[0054] Figure 11 The second schematic diagram shows the structure of a cooking appliance according to an embodiment of the present invention;

[0055] Figure 12 The third schematic diagram shows the structure of a cooking appliance according to an embodiment of the present invention;

[0056] Figure 13 The fourth schematic diagram shows the structure of a cooking appliance according to an embodiment of the present invention.

[0057] in, Figures 1 to 13 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0058] 1. Cooking appliance; 2. Heating plate; 20. Second arc surface; 22. Heating tube; 24. Thermostat; 3. Pot body; 30. First arc surface; 4. Target position; 40. First arc surface area; 42. Second arc surface area; 44. Annular arc surface; 46. Third arc surface area; 5. Shell; 6. Lid. Detailed Implementation

[0059] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0060] Many specific details are set forth in the following description in order to provide 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 scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0061] The following reference Figures 1 to 13 This invention describes a cooking appliance proposed according to some embodiments of the present invention.

[0062] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 11 , Figure 12 and Figure 13 As shown, according to one embodiment of the present invention, a cooking appliance 1 is provided, comprising: a pot body 3, a heating plate 2, and a thermostat 24. The heating plate 2 is located at the bottom of the pot body 3, and the thermostat 24 is located in the middle of the heating plate 2.

[0063] The outer bottom wall of the pot body 3 includes a first arcuate surface 30, and the heating plate 2 on the side facing the pot body 3 includes a second arcuate surface 20. The second arcuate surface 20 is disposed opposite to the first arcuate surface 30 and is adapted to the first arcuate surface 30. The first arcuate surface 30 and the second arcuate surface 20 are in circumferential contact at a target position 4. The target position 4 separates the first arcuate surface 30 and the second arcuate surface 20 into a first arcuate surface area 40 located on the inner side and a second arcuate surface area 42 located on the outer side. The second arcuate surface area 42 surrounds the first arcuate surface area 40. In the second arcuate surface area 42, the first arcuate surface 30 and the second arcuate surface 20 are at least partially spaced apart. In the first arcuate surface area 40, the first arcuate surface 30 and the second arcuate surface 20 are at least partially spaced apart.

[0064] The cooking appliance 1 provided by this utility model includes a pot body 3 and a heating plate 2. The outer bottom wall of the pot body 3 includes a first arcuate surface 30, and the heating plate 2 has a second arcuate surface 20 adapted to the side facing the pot body 3. The first arcuate surface 30 and the second arcuate surface 20 are arranged opposite to each other and contact each other circumferentially at a target position 4. This target position 4 separates the oppositely arranged first arcuate surface 30 and second arcuate surface 20 into an inner first arcuate surface area 40 and an outer second arcuate surface area 42. Within the second arcuate surface area 42, the first arcuate surface 30 and the second arcuate surface 20 are at least partially spaced apart, so that the pot body 3 and the heating plate 2 form a certain gap in the second arcuate surface area 42. This causes the contact position between the pot body 3 and the heating plate 2 to shift from the edge area in related technologies to the center of the pot body 3, thereby reducing the radial width of the air insulation layer between the center area of ​​the pot body 3 and the heating plate 2, reducing the resistance to heat transfer, improving the heat conduction efficiency into the pot body 3, and thus improving the energy efficiency of the cooking appliance 1. Meanwhile, the first arc surface 30 and the second arc surface 20 corresponding to the first arc surface area 40 are at least partially spaced apart, so that there is a certain gap between the pot body 3 and the heating plate 2 in the part corresponding to the first arc surface area 40, avoiding contact between the pot body 3 and the heating plate 2 in the inner ring of the heating plate 2, thereby keeping the contact position between the pot body 3 and the heating plate 2 away from the thermostat 24, avoiding affecting the detection result of the thermostat 24, and thus ensuring reliable control of the cooking process.

[0065] Optionally, the heating plate 2 has a through hole in the middle, the temperature controller 24 is located in the through hole, and the first arc surface area 40 surrounds the periphery of the through hole. It can be understood that the inner ring of the heating plate 2 is the periphery of the through hole.

[0066] It is understood that in the embodiments proposed in this application, the first arcuate surface 30 and the second arcuate surface 20 are in circumferential contact at the target position 4, and the first arcuate surface 30 and the second arcuate surface 20 have at least a partial gap in the space corresponding to the second arcuate surface area 42. That is, there is a gap between the pot body 3 and the heating plate 2 from the target position 4 where they are in contact to the outer edge of the heating plate 2, so that the contact position between the pot body 3 and the heating plate 2 is not at the outer edge of the heating plate 2. That is, the contact position between the pot body 3 and the heating plate 2 moves towards the middle of the pot body 3, thereby reducing the radial width between the target position 4 where the pot body 3 and the heating plate 2 are in contact and the middle of the pot body 3, thereby enhancing the temperature field between the target position 4 and the middle of the pot body 3, reducing the thermal resistance between the heating plate 2 and the pot body 3, and thus improving the heat transfer effect.

[0067] It is understandable that the first arc surface area 40 located on the inner side, that is, the area on the side of the target position 4 close to the middle of the pot body 3, and the second arc surface area 42 located on the outer side, that is, the area on the side of the target position 4 away from the middle of the pot body 3, so that the second arc surface area 42 surrounds the outer side of the first arc surface area 40.

[0068] It is understood that the pot body 3 includes a first arc surface 30, the heating plate 2 includes a second arc surface 20, and the target position 4 divides the first arc surface 30 and the second arc surface 20 into an inner first arc surface area 40 and an outer second arc surface area 42, such that the first arc surface area 40 inside the target position 4 corresponds to a portion of the first arc surface 30 and a portion of the second arc surface 20, and the second arc surface area 42 outside the target position 4 corresponds to another portion of the first arc surface 30 and another portion of the second arc surface 20.

[0069] It should be noted that the first arc-shaped surface 30 and the second arc-shaped surface 20 are adapted to each other, including the first arc-shaped surface 30 arching inwards towards the pot body 3 and the second arc-shaped surface 20 arching inwards towards the pot body 3. That is, the center of the first arc-shaped surface 30 is located on the bottom wall of the pot body 3 near the heating plate 2, and the center of the second arc-shaped surface 20 is located on the side of the heating plate 2 away from the pot body 3; or the first arc-shaped surface 30 arches towards the heating plate 2, and the second arc-shaped surface 20 is concave in the direction away from the pot body 3. That is, the center of the first arc-shaped surface 30 is located on the bottom wall of the pot body 3 away from the heating plate 2, and the center of the second arc-shaped surface 20 is located on the side of the heating plate 2 facing the surface of the pot body 3 near the pot body 3. Alternatively, a portion of the first arcuate surface 30 arches inward toward the pot body 3, and another portion of the first arcuate surface 30 arches toward the heating plate 2, such that the center of a portion of the first arcuate surface 30 is located on the bottom wall of the pot body 3 near the heating plate 2, and the center of the other portion of the first arcuate surface 30 is located on the bottom wall of the pot body 3 away from the heating plate 2. Correspondingly, a portion of the second arcuate surface 20 arches inward toward the pot body 3, and a portion of the second arcuate surface 20 is concave inward toward the direction away from the pot body 3, such that the center of a portion of the second arcuate surface 20 is located on the bottom wall of the heating plate 2 away from the pot body 3, and the center of the other portion of the second arcuate surface 20 is located on the bottom wall of the heating plate 2 near the pot body 3.

[0070] Optionally, the first arc-shaped portion 30 and the second arc-shaped portion 20 corresponding to the first arc-shaped area 40 both arch inwards towards the pot body 3, that is, the center of the first arc-shaped portion 30 corresponding to the first arc-shaped area 40 is located on the bottom wall of the pot body 3 near the heating plate 2, and the center of the second arc-shaped portion 20 is located on the side of the heating plate 2 away from the pot body 3; or the first arc-shaped portion 30 corresponding to the first arc-shaped area 40 arches towards the heating plate 2, and the second arc-shaped portion 20 is concave in the direction away from the pot body 3, that is, the center of the first arc-shaped portion 30 corresponding to the first arc-shaped area 40 is located on the bottom wall of the pot body 3 away from the heating plate 2, and the center of the second arc-shaped portion 20 is located on the side of the heating plate 2 facing the surface of the pot body 3 near the pot body 3. The first arc-shaped portion 30 and the second arc-shaped portion 20 corresponding to the second arc-shaped area 42 both arch inwards towards the pot body 3, or the first arc-shaped portion 30 corresponding to the second arc-shaped area 42 arches towards the heating plate 2, and the second arc-shaped portion 20 is concave in the direction away from the pot body 3. Optionally, the first arc-shaped surface 30 and the second arc-shaped surface 20 are both arched inwards towards the pot body 3, or the first arc-shaped surface 30 is arched towards the heating plate 2, and the second arc-shaped surface 20 is recessed inwards away from the pot body 3.

[0071] It should be noted that the first arc-shaped surface 30 and the second arc-shaped surface 20 can be in line contact at the target position 4, or the first arc-shaped surface 30 and the second arc-shaped surface 20 can be in surface contact at the target position 4. Specifically, the first arc-shaped surface 30 and the second arc-shaped surface 20 are in circumferential contact at the target position 4, ensuring that both the first arc-shaped surface 30 and the second arc-shaped surface 20 are in contact at the target position 4 along the circumference of the pot body 3. This ensures the reliability of heat transfer from the heating plate 2 to the pot body 3 and guarantees the uniformity of heating at various locations within the pot body 3.

[0072] In some embodiments, optionally, the first arc surface 30 and the second arc surface 20 corresponding to the first arc surface region 40 both arch inward toward the pot body 3, or the first arc surface 30 protrudes toward the heating plate 2 and the second arc surface 20 is recessed away from the pot body 3; the first arc surface 30 and the second arc surface 20 corresponding to the second arc surface region 42 both arch inward toward the pot body 3, or the first arc surface 30 protrudes toward the heating plate 2 and the second arc surface 20 is recessed away from the pot body 3.

[0073] In this embodiment, the first arc-shaped surface 30 and the second arc-shaped surface 20 can be either convex or concave. Optionally, the first arc-shaped surface 30 and the second arc-shaped surface 20 corresponding to the first arc-shaped surface 40 are both arched inwards towards the pot body 3, so that the heating plate 2 is convex in the first arc-shaped surface 40. Alternatively, the first arc-shaped surface 30 corresponding to the first arc-shaped surface 40 is convex towards the heating plate 2, and the second arc-shaped surface 20 is concave inwards away from the pot body 3, so that the heating plate 2 is concave in the first arc-shaped surface 40. Similarly, the first arc-shaped surface 30 and the second arc-shaped surface 20 corresponding to the second arc-shaped surface 42 are both arched inwards towards the pot body 3, so that the heating plate 2 is convex in the second arc-shaped surface 42. Alternatively, the first arc-shaped surface 30 corresponding to the second arc-shaped surface 42 is convex towards the heating plate 2, and the second arc-shaped surface 20 is concave inwards away from the pot body 3, so that the heating plate 2 is concave in the second arc-shaped surface 42.

[0074] Optionally, the first arc surface 30 and the second arc surface 20 of the first arc surface area 40, and the first arc surface 30 and the second arc surface 20 of the second arc surface area 42 are both arched inward into the pot body 3, such that the center of the first arc surface 30 is located on the bottom wall of the pot body 3 near the heating plate 2, and the center of the second arc surface 20 is located on the side of the heating plate 2 away from the pot body 3.

[0075] Alternatively, the first arc surface 30 of the first arc surface area 40 and the first arc surface 30 of the second arc surface area 42 are both protruding towards the heating plate 2, and the second arc surface 20 of the first arc surface area 40 and the second arc surface 20 of the second arc surface area 42 are both recessed in the direction away from the pot body 3, so that the center of the first arc surface 30 is located on the bottom wall of the pot body 3 away from the heating plate 2, and the center of the second arc surface 20 is located on the side of the heating plate 2 facing the surface of the pot body 3 and close to the pot body 3.

[0076] Optionally, the first arcuate portion 30 is continuously and smoothly connected from the first arcuate portion 40 to the second arcuate portion 42, and the second arcuate portion 20 is continuously and smoothly connected from the first arcuate portion 40 to the second arcuate portion 42.

[0077] In some embodiments, optionally, the radius of curvature of the first arcuate surface 30 is a first radius of curvature, and the radius of curvature of the second arcuate surface 20 is a second radius of curvature; when both the first arcuate surface 30 and the second arcuate surface 20 corresponding to the first arcuate surface region 40 arch inward toward the pot body 3, the second radius of curvature is greater than the first radius of curvature; when the first arcuate surface 30 corresponding to the first arcuate surface region 40 protrudes toward the heating plate 2, and the second arcuate surface 20 is recessed away from the pot body 3, the second radius of curvature corresponding to the first arcuate surface region 40 is smaller than the first radius of curvature; when both the first arcuate surface 30 and the second arcuate surface 20 corresponding to the second arcuate surface region 42 arch inward toward the pot body 3, the second radius of curvature corresponding to the second arcuate surface region 42 is smaller than the first radius of curvature; when the first arcuate surface 30 corresponding to the second arcuate surface region 42 protrudes toward the heating plate 2, and the second arcuate surface 20 is recessed away from the pot body 3, the second radius of curvature corresponding to the second arcuate surface region 42 is greater than the first radius of curvature.

[0078] In this embodiment, the radius of curvature of the first arcuate surface 30 is the first radius of curvature, and the radius of curvature of the second arcuate surface 20 is the second radius of curvature. It can be understood that the larger the radius of curvature, the smoother the arc surface, and the smaller the radius of curvature, the more curved the arc surface.

[0079] like Figures 1 to 4 As shown, when both the first arc surface 30 and the second arc surface 20 corresponding to the first arc surface area 40 arch inwards towards the pot body 3: the second radius of curvature corresponding to the first arc surface area 40 is greater than the first radius of curvature, that is, the radius of curvature of the second arc surface 20 corresponding to the first arc surface area 40 is greater than the radius of curvature of the first arc surface 30. This makes the second arc surface 20 corresponding to the first arc surface area 40 flatter than the first arc surface 30, and the first arc surface 30 more curved than the second arc surface 20. This allows the first arc surface 30 to be moved away from the second arc surface 20. In other words, this arrangement can ensure that there is a gap between the first arc surface 30 and the second arc surface 20 within the first arc surface area 40, avoiding contact between the pot body 3 and the heating plate 2 in the first arc surface area 40. This also prevents the contact position between the pot body 3 and the heating plate 2 from being too close to the temperature controller 24 in the middle of the heating plate 2, thus ensuring the control of the temperature of the pot body 3.

[0080] like Figure 11As shown, when the first arc surface 30 corresponding to the first arc surface area 40 protrudes towards the heating plate 2, and the second arc surface 20 is recessed away from the pot body 3: the second radius of curvature is smaller than the first radius of curvature, that is, the radius of curvature of the first arc surface 30 corresponding to the first arc surface area 40 is larger than the radius of curvature of the second arc surface 20. This makes the first arc surface 30 corresponding to the first arc surface area 40 flatter than the second arc surface 20, and the second arc surface 20 more curved than the first arc surface 30. This allows the second arc surface 20 to move away from the first arc surface 30. In other words, this arrangement can ensure that there is a gap between the first arc surface 30 and the second arc surface 20 within the first arc surface area 40, avoiding contact between the pot body 3 and the heating plate 2 in the first arc surface area 40. This also prevents the contact position between the pot body 3 and the heating plate 2 from being too close to the thermostat 24 in the middle of the heating plate 2, thus ensuring the control of the temperature of the pot body 3.

[0081] like Figures 1 to 4 As shown, when both the first arc surface 30 and the second arc surface 20 corresponding to the second arc surface area 42 arch inward toward the pot body 3: the second radius of curvature corresponding to the second arc surface area 42 is smaller than the first radius of curvature, making the curvature of the second arc surface 20 corresponding to the second arc surface area 42 greater, and the first arc surface 30 corresponding to the second arc surface area 42 more gentle. As a result, the second arc surface 20 corresponding to the second arc surface area 42 gradually moves away from the pot body 3 from the inner edge to the outer edge, so as to avoid the pot body 3 and the heating plate 2 from contacting each other in the space corresponding to the second arc surface area 42, thereby avoiding the situation where the contact position between the pot body 3 and the heating plate 2 is too close to the outer edge of the heating plate 2, resulting in poor heat transfer effect.

[0082] like Figure 11 As shown, when the first arc surface 30 corresponding to the second arc surface area 42 protrudes towards the heating plate 2 and the second arc surface 20 is concave away from the pot body 3: the second radius of curvature corresponding to the second arc surface area 42 is greater than the first radius of curvature, making the curvature of the first arc surface 30 corresponding to the second arc surface area 42 greater and the second arc surface 20 corresponding to the second arc surface area 42 more gentle. As a result, the first arc surface 30 corresponding to the second arc surface area 42 gradually moves away from the heating plate 2 from the inner edge to the outer edge, so as to avoid the pot body 3 and the heating plate 2 from contacting each other in the space corresponding to the second arc surface area 42, thereby avoiding the situation where the contact position between the pot body 3 and the heating plate 2 is too close to the outer edge of the heating plate 2, resulting in poor heat transfer effect.

[0083] Optionally, when the second arc surface 20 of the first arc surface region 40 and the second arc surface 20 of the second arc surface region 42 both arch inward into the pot body 3, the heating plate 2 is a convex plate.

[0084] Optionally, the second arc surface 20 corresponding to the first arc surface region 40 is the first arc surface, and the second arc surface 20 corresponding to the second arc surface region 42 is the second arc surface. The second arc surface surrounds the outside of the first arc surface and is connected to the first arc surface. Both the first arc surface and the second arc surface arch outwards from the disk body. The first arc surface 30 corresponding to the first arc surface region 40 is the third arc surface, and the first arc surface 30 corresponding to the second arc surface region 42 is the fourth arc surface. The fourth arc surface surrounds the outside of the third arc surface and is connected to the third arc surface.

[0085] The radius of curvature of the first arc surface is greater than that of the second arc surface. The radius of curvature of the third arc surface is smaller than that of the fourth arc surface.

[0086] Optionally, refer to Figure 1 The heating plate 2 includes a first side and a second side arranged opposite to each other. The first side is the side of the heating plate 2 facing the pot body 3 along the vertical direction of the cooking appliance, and the second side is the side of the heating plate 2 away from the pot body 3 along the vertical direction of the cooking appliance. Both the first arc surface and the second arc surface are located on the first side of the heating plate 2 (that is, on the side of the heating plate 2 facing the pot body) and arch away from the second side. The second arc surface extends from the inner edge to the outer edge towards the second side.

[0087] In some embodiments, optionally, in the first arc surface 30 and the second arc surface 20 corresponding to the second arc surface region 42: the difference between the first radius of curvature and the second radius of curvature is greater than or equal to 10 mm and less than or equal to 400 mm; and / or in the first arc surface 30 and the second arc surface 20 corresponding to the first arc surface region 40: the difference between the first radius of curvature and the second radius of curvature is greater than or equal to 10 mm and less than or equal to 400 mm.

[0088] In this embodiment, if the difference between the first and second radii of curvature is too small, deformation of the heating plate 2 and pot body 3 after repeated use, or the influence of manufacturing tolerances, can easily lead to the radii of curvature of the first arc surface 30 and the second arc surface 20 becoming close. This causes the outer edge of the second arc surface 20 corresponding to the second arc surface area 42 to approach the pot body 3, making it easy for the pot body 3 to come into contact with the heating plate 2 near the outer edge of the second arc surface area 42. Consequently, a large air layer is formed between the outer edge of the pot body 3 and the middle of the heating plate 2, affecting the heat transfer effect from the heating plate 2 to the pot body 3. Therefore, designing the difference between the first and second radii of curvature to be greater than or equal to 10 mm can shorten the heat transfer distance between the heating tube 22 and the pot body 3, thereby ensuring the heat transfer efficiency of the heating tube 22. At the same time, if the difference between the first and second radii of curvature is too large, it can easily lead to the heating plate 2 or the pot body 3 occupying too much space in the vertical direction, affecting the overall height of the cooking appliance 1 or the volume of the pot body 3.

[0089] Optionally, the difference between the first radius of curvature and the second radius of curvature is greater than or equal to 50 mm and less than or equal to 350 mm.

[0090] Optionally, the difference between the first radius of curvature and the second radius of curvature can be set to any value among 50mm, 100mm, 150mm, 200mm, 250mm, 300mm, and 350mm, or any value between any two values.

[0091] In some embodiments, optionally, when both the first arcuate surface 30 and the second arcuate surface 20 arch inward toward the pot body 3: the first radius of curvature of the first arcuate surface 40 is greater than or equal to 500 mm and less than or equal to 900 mm, and the second radius of curvature is greater than or equal to 500 mm and less than or equal to 900 mm; the first radius of curvature of the second arcuate surface 42 is greater than or equal to 500 mm and less than or equal to 900 mm, and the second radius of curvature is greater than or equal to 500 mm and less than or equal to 900 mm; when the first arcuate surface 30 protrudes toward the heating plate 2, and the second arcuate surface 20 is recessed away from the pot body 3: the first radius of curvature of the first arcuate surface 40 is greater than or equal to 50 mm and less than or equal to 900 mm, and the second radius of curvature is greater than or equal to 50 mm and less than or equal to 900 mm; the first radius of curvature of the second arcuate surface 42 is greater than or equal to 50 mm and less than or equal to 900 mm, and the second radius of curvature is greater than or equal to 50 mm and less than or equal to 900 mm.

[0092] In this embodiment, if the first and second radii of curvature are too large, the surface of the heating plate 2 will be too flat, affecting the compatibility between the heating plate 2 and the pot body 3. If the first and second radii of curvature are too small, the height of the heating plate 2 arching will be too high, thus affecting the space occupied in the height direction of the cooking appliance 1. Therefore, when both the first arc surface 30 and the second arc surface 20 arch inward toward the pot body 3: the first radius of curvature is set to be greater than or equal to 500 mm and less than or equal to 900 mm, and the second radius of curvature is greater than or equal to 500 mm and less than or equal to 900 mm. When the first arc surface 30 protrudes toward the heating plate 2 and the second arc surface 20 is concave away from the pot body 3: the first radius of curvature is set to be greater than or equal to 50 mm and less than or equal to 900 mm, and the second radius of curvature is set to be greater than or equal to 50 mm and less than or equal to 900 mm. This ensures both the compatibility between the heating plate 2 and the pot body 3 and prevents the heating plate 2 from arching too high, thus guaranteeing the strength of the heating plate 2.

[0093] Optionally, when both the first arc surface 30 and the second arc surface 20 arch inward into the pot body 3: the first radius of curvature and the second radius of curvature corresponding to the first arc surface 40 are both greater than or equal to 650 mm and less than or equal to 850 mm, and the first radius of curvature and the second radius of curvature corresponding to the second arc surface 42 are both greater than or equal to 600 mm and less than or equal to 700 mm.

[0094] When the first arc surface 30 protrudes towards the heating plate 2 and the second arc surface 20 is recessed away from the pot body 3: the first radius of curvature and the second radius of curvature corresponding to the first arc surface 40 are both greater than or equal to 50 mm and less than or equal to 900 mm, and the first radius of curvature and the second radius of curvature corresponding to the second arc surface 42 are both greater than or equal to 100 mm and less than or equal to 300 mm.

[0095] In some embodiments, optionally, both the first arcuate region 40 and the second arcuate region 42 are arranged in a ring shape, such as... Figure 2 As shown, the gap distance between the first arcuate portion 30 and the second arcuate portion 20 corresponding to the outer edge of the second arcuate region 42 is greater than or equal to 0.04 mm and less than or equal to 30 mm; wherein, as Figure 4 As shown, when the first arc surface area 30 and the second arc surface area 20 corresponding to the first arc surface area 40 are at least partially spaced apart, the gap distance between the first arc surface area 30 and the second arc surface area 20 corresponding to the inner edge of the first arc surface area 40 is greater than or equal to 0.04 mm and less than or equal to 30 mm.

[0096] In this embodiment, if the gap between the first arc-shaped part 30 and the second arc-shaped part 20 corresponding to the outer edge of the second arc-shaped area 42 is too large, heat loss will easily occur. If the gap between the first arc-shaped part 30 and the second arc-shaped part 20 corresponding to the outer edge of the second arc-shaped area 42 is too small, the pot body 3 and the heating plate 2 will easily come into contact in the second arc-shaped area 42. Therefore, setting the gap between the first arc-shaped part 30 and the second arc-shaped part 20 corresponding to the outer edge of the second arc-shaped area 42 between 0.04mm and 30mm can ensure that the pot body 3 and the heating plate 2 have a reliable gap in the second arc-shaped area 42 and can reduce heat loss.

[0097] Optionally, the gap between the first arcuate portion 30 and the second arcuate portion 20 corresponding to the outer edge of the second arcuate portion 42 is greater than or equal to 0.06 mm and less than or equal to 1 mm.

[0098] Optionally, the gap between the first arcuate portion 30 and the second arcuate portion 20 corresponding to the outer edge of the second arcuate region 42 is greater than or equal to 0.06 mm and less than or equal to 0.4 mm.

[0099] like Figure 7 and Figure 12As shown, in some embodiments, optionally, when both the first arcuate surface 30 and the second arcuate surface 20 arch inward toward the pot body 3: a third arcuate surface region 46 is also constructed between the first arcuate surface 30 and the second arcuate surface 20, and the third arcuate surface region 46 surrounds the periphery of the second arcuate surface region 42; the first arcuate surface 30 corresponding to the third arcuate surface region 46 protrudes outward toward the pot body 3, the second arcuate surface 20 is recessed in the direction away from the pot body 3, and the first arcuate surface 30 and the second arcuate surface 20 corresponding to the third arcuate surface region 46 are spaced apart.

[0100] In this embodiment, a third arcuate region 46 is constructed between the first arcuate surface 30 and the second arcuate surface 20. The third arcuate region 46 surrounds the periphery of the second arcuate region 42, and the first arcuate surface 30 corresponding to the third arcuate region 46 arches outward from the pot body 3, while the second arcuate surface 20 corresponding to the third arcuate region 46 is recessed in the direction away from the pot body 3. This gives the third arcuate region 46 a positioning effect, ensuring reliable assembly of the pot body 3 and the heating plate 2. The first arcuate surface 30 and the second arcuate surface 20 corresponding to the third arcuate region 46 are spaced apart to prevent the pot body 3 and the heating plate 2 from contacting at the third arcuate region 46 and separating at the target position 4, thereby ensuring efficient heat transfer.

[0101] In some embodiments, optionally, the gap distance between the first arcuate portion 30 and the second arcuate portion 20 corresponding to the outer edge of the third arcuate region 46 is greater than or equal to 0.04 mm and less than or equal to 30 mm; the gap distance between the first arcuate portion 30 and the second arcuate portion 20 corresponding to the outer edge of the second arcuate region 42 is greater than or equal to 0.04 mm and less than or equal to 0.2 mm; and / or the first arcuate portion 30 corresponding to the second arcuate region 42 is connected to the first arcuate portion 30 corresponding to the third arcuate region 46, and the second arcuate portion 20 corresponding to the second arcuate region 42 is connected to the second arcuate portion 20 corresponding to the third arcuate region 46; the first radius of curvature corresponding to the third arcuate region 46 is greater than or equal to 5 mm and less than or equal to 50 mm, and the second radius of curvature corresponding to the third arcuate region 46 is greater than or equal to 5 mm and less than or equal to 50 mm.

[0102] In this embodiment, if the gap between the first arc-shaped portion 30 and the second arc-shaped portion 20 corresponding to the outer edge of the third arc-shaped area 46 is too large, heat loss will easily occur. If the gap between the first arc-shaped portion 30 and the second arc-shaped portion 20 corresponding to the outer edge of the third arc-shaped area 46 is too small, the pot body 3 and the heating plate 2 will easily come into contact in the third arc-shaped area 46. Therefore, setting the gap between the first arc-shaped portion 30 and the second arc-shaped portion 20 corresponding to the outer edge of the third arc-shaped area 46 between 0.04 mm and 30 mm can ensure that the pot body 3 and the heating plate 2 have a reliable gap in the third arc-shaped area 46 and can reduce heat loss. At the same time, setting the gap between the first arc-shaped portion 30 and the second arc-shaped portion 20 corresponding to the outer edge of the second arc-shaped area 42 between 0.04 mm and 0.2 mm can ensure that the pot body 3 and the heating plate 2 do not come into contact in the second arc-shaped area 42. Optionally, the first arcuate portion 30 corresponding to the second arcuate region 42 is connected to the first arcuate portion 30 corresponding to the third arcuate region 46, and the second arcuate portion 20 corresponding to the second arcuate region 42 is connected to the second arcuate portion 20 corresponding to the third arcuate region 46. This allows the first arcuate portion 30 to extend continuously from the second arcuate region 42 to the third arcuate region 46, and the second arcuate portion 20 to extend continuously from the second arcuate region 42 to the third arcuate region 46. This improves the continuity of the outer bottom wall of the pot body 3, thereby ensuring that the pot body 3 and the heating plate 2 have gaps between the second arcuate region 42 and the third arcuate region 46. Optionally, the first radius of curvature of the first arcuate portion 30 and the second radius of curvature of the second arcuate portion 20 corresponding to the third arcuate region 46 are within the range of 5mm to 50mm, so that the curvature of the first arcuate portion 30 and the second arcuate portion 20 of the third arcuate region 46 is slightly larger, thus achieving the effect of initial positioning of the pot body 3.

[0103] Optionally, the first radius of curvature corresponding to the third arc surface region 46 is greater than or equal to 10 mm and less than or equal to 30 mm, and the second radius of curvature corresponding to the third arc surface region 46 is greater than or equal to 10 mm and less than or equal to 30 mm.

[0104] In some embodiments, optionally, such as Figure 1 and Figure 3 As shown, the first arcuate surface 30 and the second arcuate surface 20 are in circular contact at the target position 4; or as... Figure 6 , Figure 10 , Figure 11 and Figure 12 As shown, the first arcuate surface 30 and the second arcuate surface 20 are in annular contact at the target position 4, and the first radius of curvature of the first arcuate surface 30 at the target position 4 is the same as the second radius of curvature of the second arcuate surface 20.

[0105] In this embodiment, the first arc-shaped surface 30 and the second arc-shaped surface 20 can make line contact at the target position 4, such that the contact position of the first arc-shaped surface 30 and the second arc-shaped surface 20 is annular. Alternatively, the first arc-shaped surface 30 and the second arc-shaped surface 20 can make surface contact at the target position 4, such that the contact position between the first arc-shaped surface 30 and the second arc-shaped surface 20 is annular, thereby increasing the contact area between the pot body 3 and the heating plate 2. Specifically, when the first arc-shaped surface 30 and the second arc-shaped surface 20 make annular surface contact at the target position 4, the first radius of curvature of the first arc-shaped surface 30 corresponding to the annular surface is the same as the second radius of curvature of the second arc-shaped surface 20, thus ensuring that the first arc-shaped surface 30 and the second arc-shaped surface 20 fit together at the target position 4.

[0106] like Figure 11 As shown, in some embodiments, the heating plate 2 may optionally include a heating tube 22 for heating the pot body 3, and the heating tube 22 is at least partially disposed opposite to the target position 4.

[0107] In this embodiment, the heating plate 2 also includes a heating tube 22. When the heating tube 22 is turned on, it can transfer heat to the pot body 3 to cook the food inside the pot body 3. The heating tube 22 is at least partially positioned opposite the target position 4, that is, at least partially positioned opposite the contact point between the pot body 3 and the heating plate 2. This shortens the path for the heating tube 22 to transfer heat to the pot body 3, thereby improving the heating efficiency of the heating plate 2 and the energy efficiency of the cooking appliance 1.

[0108] It is understood that the heating tube 22 is positioned relative to the target position 4, which may include the geometric center of the tube cross-section of the heating tube 22 being positioned relative to the target position 4. For example, in the orthographic projection along the vertical direction of the cooking appliance 1, the projection of the target position 4 coincides with the heating tube 22.

[0109] like Figure 6 , Figure 10 , Figure 11 and Figure 12 As shown, in some embodiments, optionally, when the first arcuate surface 30 and the second arcuate surface 20 are in annular surface contact at the target position 4, the target position 4 is an annular arcuate surface 44, which covers at least a portion of the heating tube 22 in the projection along the vertical direction of the cooking appliance 1.

[0110] In this embodiment, the target position 4 is an annular arc surface 44, which makes the first arc surface 30 and the second arc surface 20 in surface contact at the target position 4, increasing the contact area between the pot body 3 and the heating plate 2. At the same time, the orthographic projection of the annular arc surface 44 covers at least a part of the heating tube 22, so that at least a part of the heating tube 22 is arranged opposite to the annular arc surface 44. Thus, the heat generated by the heating tube 22 can be directly transferred upward to the pot body 3 through the heating plate 2, shortening the heat transfer distance between the heating tube 22 and the pot body 3, improving the heat transfer efficiency and the energy efficiency of the cooking appliance 1.

[0111] like Figure 5 , Figure 6 and Figure 7 As shown, in some embodiments, optionally, with the center of the heating plate 2 as the point of origin: the diameter of the circle containing the geometric center of the heating tube 22 is the first diameter D1, and the ratio of the first diameter D1 to the diameter D6 of the heating plate 2 is the first ratio; when the first arcuate portion 30 and the second arcuate portion 20 are in annular contact at the target position 4, the diameter of the circle containing the target position 4 is the second diameter D2, and the ratio of the second diameter D2 to the diameter D6 of the heating plate 2 is the second ratio; when the first arcuate portion 30 and the second arcuate portion 20 are in annular surface contact at the target position 4: the target position 4 is an annular arc surface 44. The diameter of the circle containing the inner edge of the annular arc surface 44 is the third diameter D3, and the diameter of the circle containing the outer edge of the annular arc surface 44 is the fourth diameter D4. The ratio of the third diameter D3 to the diameter D6 of the heating plate 2 is the third ratio, and the ratio of the fourth diameter D4 to the diameter D6 of the heating plate 2 is the fourth ratio. Among them, the first ratio is greater than or equal to 0.4 and less than or equal to 1, the second ratio is greater than or equal to 0.2 and less than or equal to 0.8, the third ratio is greater than or equal to 0.4 and less than or equal to 0.6, and the fourth ratio is greater than or equal to 0.6 and less than or equal to 0.9.

[0112] In this embodiment, the distance between the heating tube 22 and the target position 4 affects the heat transfer distance from the heating plate 2 to the pot body 3. When the first arcuate portion 30 and the second arcuate portion 20 are in annular contact at the target position 4: the first ratio corresponding to the heating tube 22 is greater than or equal to 0.4 and less than or equal to 1, and the second ratio corresponding to the target position 4 is greater than or equal to 0.2 and less than or equal to 0.8, limiting the distance between the heating tube 22 and the target position 4, making the heating tube 22 closer to the target position 4, thereby shortening the heat transfer distance. When the first arcuate portion 30 and the second arcuate portion 20 are in annular contact at the target position 4, the third ratio is greater than or equal to 0.4 and less than or equal to 0.6, the fourth ratio is greater than or equal to 0.6 and less than or equal to 0.9, and the first ratio is greater than or equal to 0.4 and less than or equal to 1, ensuring the distance between the heating tube 22 and the target position 4, thereby shortening the heat transfer distance.

[0113] Optionally, the first ratio is greater than or equal to 0.5 and less than or equal to 0.9.

[0114] Optionally, the second ratio is greater than or equal to 0.4 and less than or equal to 0.8.

[0115] Optionally, the diameter of the circle containing the outer edge of the second arc surface area 42 is the fifth diameter D5, and the ratio of the fifth diameter D5 to the diameter D6 of the heating plate 2 is the fifth ratio, which is greater than or equal to 0.4 and less than or equal to 1. Optionally, the fifth ratio is greater than or equal to 0.6 and less than or equal to 0.9.

[0116] Optionally, the first reference line L1 is the tangent line of the circle containing the geometric center of the cross-section of the heating tube 22 along the vertical direction of the cooking appliance 1.

[0117] Optionally, the tangent of the circle containing the outer edge of the first arc surface area 40 along the vertical direction of the cooking appliance 1 is the second reference line L2. Specifically, when the first arc surface area 30 and the second arc surface area 20 are in contact at the target position 4, the tangent of the circle containing the target position 4 along the vertical direction of the cooking appliance 1 is the second reference line L2.

[0118] Optionally, the tangent of the circle containing the outer edge of the second arc surface area 42 along the vertical direction of the cooking appliance 1 is the third reference line L3.

[0119] In some embodiments, optionally, the third ratio is less than the first ratio, and the first ratio is greater than the fourth ratio.

[0120] In this embodiment, the third ratio is less than the first ratio and the first ratio is greater than the fourth ratio, so that the heating tube 22 is located in the area of ​​the annular arc surface 44, thereby shortening the heat transfer path between the heating tube 22 and the pot body 3 and improving the heat transfer efficiency.

[0121] In some embodiments, optionally, when both the first arcuate surface 30 and the second arcuate surface 20 arch inward toward the pot body 3: the first radius of curvature and the second radius of curvature corresponding to the annular arcuate surface 44 are both greater than or equal to 500 mm and less than or equal to 900 mm; when the first arcuate surface 30 protrudes toward the heating plate 2 and the second arcuate surface 20 is recessed away from the pot body 3: the first radius of curvature and the second radius of curvature corresponding to the annular arcuate surface 44 are both greater than or equal to 50 mm and less than or equal to 900 mm.

[0122] In this embodiment, the first and second radii of curvature corresponding to the annular arc surface 44 are set to ensure the compatibility between the heating plate 2 and the pot body 3, and to prevent the heating plate 2 from arching too high, thus ensuring the strength of the heating plate 2.

[0123] Optionally, when both the first arc surface 30 and the second arc surface 20 arch inward into the pot body 3: the first radius of curvature and the second radius of curvature corresponding to the annular arc surface 44 are both greater than or equal to 550 mm and less than or equal to 750 mm.

[0124] Optionally, when the first arc surface 30 protrudes towards the heating plate 2 and the second arc surface 20 is recessed away from the pot body 3: the first radius of curvature and the second radius of curvature corresponding to the annular arc surface 44 are both greater than or equal to 50 mm and less than or equal to 300 mm.

[0125] In some embodiments, optionally, when the heating power of the heating plate 2 is greater than or equal to 300W and less than or equal to 450W, the diameter D6 of the heating plate 2 is greater than or equal to 100mm and less than or equal to 160mm; when the heating power of the heating plate 2 is greater than or equal to 450W and less than or equal to 680W, the diameter D6 of the heating plate 2 is greater than or equal to 120mm and less than or equal to 180mm; when the heating power of the heating plate 2 is greater than or equal to 680W and less than or equal to 1200W, the diameter D6 of the heating plate 2 is greater than or equal to 150mm and less than or equal to 220mm.

[0126] In this embodiment, the heating plate 2 can have different power types. Different heating powers correspond to different diameters of the heating plate 2; the higher the heating power, the larger the diameter. Optionally, when the heating power of the heating plate 2 is greater than or equal to 300W and less than or equal to 450W, the diameter D6 of the heating plate 2 can be set to greater than or equal to 100mm and less than or equal to 160mm; or when the heating power of the heating plate 2 is greater than or equal to 450W and less than or equal to 680W, the diameter D6 can be set to greater than or equal to 120mm and less than or equal to 180mm; or when the heating power of the heating plate 2 is greater than or equal to 680W and less than or equal to 1200W, the diameter D6 can be set to greater than or equal to 150mm and less than or equal to 220mm, and so on.

[0127] In some embodiments, the cooking appliance 1 may optionally include: a housing 5, a pot body 3 and a heating plate 2 all disposed within the housing 5; and / or the cooking appliance 1 may include any one of a rice cooker, an electric pressure cooker, or an electric slow cooker.

[0128] In this embodiment, both the pot body 3 and the heating plate 2 are disposed within the casing 5, which can reduce heat loss. Optionally, the cooking appliance 1 can be any one of a rice cooker, an electric pressure cooker, or an electric slow cooker.

[0129] Optionally, the cooking appliance 1 also includes a lid 6, which is closable and connectable to the housing 5.

[0130] In some embodiments, optionally, the cooking appliance 1 includes a heating plate 2 and a pot body 3. The pot body 3 has a first arcuate surface 30, and the heating plate 2 has a second arcuate surface 20. The first arcuate surface 30 and the second arcuate surface 20 mate and are configured as a mating arcuate area. Optionally, the target position 4 (e.g., a first reference line L1 or an annular arcuate surface 44) divides the mating arcuate area into a first arcuate area 40 and a second arcuate area 42. The first arcuate area 40 and the second arcuate area 42 are distributed on both sides of the target position 4, wherein the first arcuate area 40 is distributed in the inner circle of the target position 4, and the second arcuate area 42 is distributed in the outer circle of the target position 4. The mating arcuate surfaces of the pot body 3 and the heating plate 2 are mated with zero clearance at the target position 4, so that the pot body 3 and the heating plate 2 are in contact at the target position 4, and there is at least a gap distance between the mating arcuate surfaces of the pot body 3 and the heating plate 2 in the second arcuate area 42.

[0131] Optionally, the annular width of the first arc surface region 40 is a first width H1, and the annular width of the second arc surface region 42 is a second width H2.

[0132] Optionally, the mating arc surfaces of the pot body 3 and the heating plate 2 have at least a portion of a gap distance in both the first arc surface area 40 and the second arc surface area 42.

[0133] Optionally, in the second arc area 42, the gap between the mating arc surfaces of the pot body 3 and the heating plate 2 is greater than or equal to 0.02 mm. A 0.02 mm thick coating is sprayed onto the outer surface of the bottom of the pot body 3, and the pot body 3 is immediately placed on the heating plate 2. In the second arc area 42, a portion of the annular width area is not coated. The gap distance between the outer edges of the second arc surface area 42 is greater than or equal to 0.04 mm; optionally, the gap distance between the first arc surface area 30 and the second arc surface area 20 corresponding to the outer edge of the second arc surface area 42 is greater than or equal to 0.1 mm; the gap distance gradually increases from the boundary of the first reference line L1 or the annular arc surface 44 to the outer edge of the second arc surface area 42, the thickness of the sprayed coating gradually increases from 0 mm to the thickness of the gap distance corresponding to the outer edge, and the pot body 3 is immediately placed on the heating plate 2, the annular width of the coating covering the second arc surface area 42 of the heating plate 2 gradually increases; when the thickness of the sprayed coating is 50% of the gap distance corresponding to the outer edge of the second arc surface area 42, the pot body 3 is immediately placed on the heating plate 2, and the coating can cover the annular width of the second arc surface area 42 of the heating plate 2 that is greater than or equal to 50% of the second width H2.

[0134] Optionally, such as Figure 8 , Figure 9 and Figure 10As shown, in the first arc surface area 40, corresponding to the first arc surface portion 30 and the second arc surface portion 20, there are some areas with a gap distance greater than or equal to 0.02 mm. A 0.02 mm thick coating is sprayed onto the outer surface of the bottom of the pot body 3, and the pot body 3 is immediately placed on the heating plate 2. Some annular width areas of the first arc surface area 40 are not coated. The gap distance between the first arc surface portion 30 and the second arc surface portion 20 corresponding to the inner edge of the first arc surface area 40 is greater than or equal to 0.04 mm. Optionally, the gap distance between the first arc surface portion 30 and the second arc surface portion 20 corresponding to the inner edge of the first arc surface area 40 is greater than or equal to 0.1 mm. Optionally, the gap distance between the first arc surface portion 30 and the second arc surface portion 20 corresponding to the inner edge of the first arc surface area 40 is greater than or equal to 0.2 mm. The gap distance between the first arc surface portion 30 and the second arc surface portion 20 extends from the boundary of the first reference line L1 or the annular arc surface 44 towards the first arc surface area. The inner edge of the coating gradually increases, and the thickness of the sprayed coating gradually increases from 0mm to the thickness corresponding to the gap distance of the inner edge. Immediately after placing the pot 3 on the heating plate 2, the annular width of the coating covering the first arc surface area 40 of the heating plate 2 gradually increases. When the thickness of the sprayed coating is 50% of the gap distance of the inner edge of the first arc surface area 40, immediately after placing the pot 3 on the heating plate 2, the coating can cover the annular width of the first arc surface area 40 of the heating plate 2 that is greater than or equal to 50% of the first width H1 (and the area contaminated with coating is the area close to the target position 4). When the thickness of the sprayed coating is 50% of the minimum gap distance between the inner edge of the first arc surface area 40 and the outer edge of the second arc surface area 42, immediately after placing the pot 3 on the heating plate 2, the coating can cover the annular width of the arc surface area of ​​the heating plate 2 that is in contact with the heating plate 2 that is greater than or equal to 50% (and the area contaminated with coating extends from the target position 4 to the edges on both sides). Figure 8 , Figure 9 and Figure 10 The shaded areas represent the areas that have been painted.

[0135] Optionally, the first radius of curvature of the pot body 3 in the second arc area 42 and the second radius of curvature of the heating plate 2 have a difference at the same vertical position, and the difference is greater than or equal to 10 mm.

[0136] (1) When the mating arc surface of the second arc surface area 42 is an upward arched shape (i.e. the center of the mating arc surface is set below the arc surface): In the first arc surface area 30 and the second arc surface area 20 corresponding to the second arc surface area 42, at the same vertical position, the second radius of curvature of the heating plate 2 is < the first radius of curvature of the pot body 3.

[0137] (2) When the mating arc surface of the second arc surface area 42 is concave downward (i.e. the center of the mating arc surface is set above the arc surface): In the first arc surface area 30 and the second arc surface area 20 corresponding to the second arc surface area 42, at the same vertical position, the second radius of curvature of the heating plate 2 is greater than the first radius of curvature of the pot body 3.

[0138] Optionally, when there is a gap between the mating arc surfaces of the pot body 3 and the heating plate 2 in the first arc area 40, the first radius of curvature of the pot body 3 corresponding to the first arc area 40 and the second radius of curvature of the heating plate 2 have a difference at the same vertical position, and the difference is greater than or equal to 10 mm and less than or equal to 400 mm.

[0139] (1) When the mating arc surface of the first arc surface area 40 is an upward arched shape (i.e. the center of the mating arc surface is set below the arc surface): In the first arc surface area 30 and the second arc surface area 20 corresponding to the first arc surface area 40, at the same vertical position, the second radius of curvature of the heating plate 2 is greater than the first radius of curvature of the pot body 3.

[0140] (2) When the mating arc surface of the first arc surface area 40 is concave downward (i.e. the center of the mating arc surface is set above the arc surface): In the first arc surface area 30 and the second arc surface area 20 corresponding to the first arc surface area 40, at the same vertical position, the second radius of curvature of the heating plate 2 is < the first radius of curvature of the pot body 3.

[0141] 1. When the first arc surface area 40 and the second arc surface area 42, corresponding to the first arc surface portion 30 and the second arc surface portion 20, are both upwardly arched, the heating plate 2 is a convex plate. Wherein:

[0142] (1) When there is a gap distance in both the first arc surface region 40 and the second arc surface region 42:

[0143] First arc area 40: The second radius of curvature of the heating plate 2 is greater than the first radius of curvature of the pot body 3 (at the same vertical position); Second arc area 42: The second radius of curvature of the heating plate 2 is less than the first radius of curvature of the pot body 3 (at the same vertical position).

[0144] Gap distance: The gap distance corresponding to the outer edge of the second arc surface area 42 is greater than or equal to 0.04 mm and less than or equal to 30 mm. Optionally, the gap distance corresponding to the outer edge of the second arc surface area 42 is greater than or equal to 0.06 mm and less than or equal to 1 mm. Optionally, the gap distance corresponding to the outer edge of the second arc surface area 42 is greater than or equal to 0.06 mm and less than or equal to 0.4 mm. The gap distance corresponding to the outer edge of the first arc surface area 40 is greater than or equal to 0.04 mm and less than or equal to 30 mm. Optionally, the gap distance corresponding to the outer edge of the first arc surface area 40 is greater than or equal to 0.06 mm and less than or equal to 1 mm. Optionally, the gap distance corresponding to the outer edge of the first arc surface area 40 is greater than or equal to 0.1 mm and less than or equal to 0.5 mm.

[0145] (2) The outer edge of the second arc surface area 42 is tangent to the vertical direction of the cooking appliance 1 as the third reference line L3: There is a third arc surface area 46 outside the third reference line L3. The second arc surface area 42 and the third arc surface area 46 are connected at the second reference line L2. The third arc surface area 46 is a downward concave shape. The first arc surface area 30 and the second arc surface area 20 have a gap distance in the third arc surface area 46.

[0146] Gap distance: The gap distance corresponding to the outer edge of the heating element in the third arc surface area 46 is greater than or equal to 0.04 mm and less than or equal to 30 mm. Optionally, the gap distance corresponding to the outer edge of the heating element in the third arc surface area 46 is greater than or equal to 0.06 mm and less than or equal to 1 mm. Optionally, the gap distance corresponding to the outer edge of the heating element in the third arc surface area 46 is greater than or equal to 0.06 mm and less than or equal to 0.4 mm. The gap distance corresponding to the outer edge of the second arc surface area 42 is greater than or equal to 0.04 mm and less than or equal to 0.2 mm.

[0147] II. When both the first arc surface region 40 and the second arc surface region 42 are concave, the heating plate 2 is a concave plate, wherein:

[0148] When there is a gap between the first arc-shaped surface 30 and the second arc-shaped surface 20 in both the first arc-shaped area 40 and the second arc-shaped area 42:

[0149] First arc area 40: The second radius of curvature of the heating plate 2 is less than the first radius of curvature of the pot body 3.

[0150] Second arc area 42: The second radius of curvature of the heating plate 2 is greater than the first radius of curvature of the pot body 3.

[0151] Gap distance: The gap distance corresponding to the outer edge of the second arc surface area 42 is greater than or equal to 0.04 mm and less than or equal to 30 mm. Optionally, the gap distance corresponding to the outer edge of the second arc surface area 42 is greater than or equal to 0.1 mm and less than or equal to 1 mm. Optionally, the gap distance corresponding to the outer edge of the second arc surface area 42 is greater than or equal to 0.2 mm and less than or equal to 0.8 mm. The gap distance corresponding to the inner edge of the first arc surface area 40 is greater than or equal to 0.04 mm and less than or equal to 30 mm. Optionally, the gap distance corresponding to the inner edge of the first arc surface area 40 is greater than or equal to 0.1 mm and less than or equal to 3 mm. Optionally, the gap distance corresponding to the inner edge of the first arc surface area 40 is greater than or equal to 0.2 mm and less than or equal to 1.2 mm.

[0152] Optionally, the diameter of the circle containing the geometric center of the heating tube 22 is a first diameter D1, and the ratio of the first diameter D1 to the diameter D6 of the heating plate 2 is a first ratio: the first ratio is greater than or equal to 0.4 and less than or equal to 1, or optionally, the first ratio is greater than or equal to 0.5 and less than or equal to 0.9.

[0153] Optionally, the diameter of the circle where the target position 4 is located is the second diameter D2, and the ratio of the second diameter D2 to the diameter D6 of the heating plate 2 is the second ratio. The second ratio is greater than or equal to 0.2 and less than or equal to 0.8. Optionally, the second ratio is greater than or equal to 0.4 and less than or equal to 0.8.

[0154] Optionally, when the target position 4 is an annular arc surface 44, the ratio of the third diameter D3 of the circle containing the inner boundary of the annular arc surface 44 to the diameter D6 of the heating plate 2 is a third ratio, which is greater than or equal to 0.4 and less than or equal to 0.6; the ratio of the fourth diameter D4 of the circle containing the outer boundary of the annular arc surface 44 to the diameter D6 of the heating plate 2 is a fourth ratio, which is greater than or equal to 0.6 and less than or equal to 0.9.

[0155] Optionally, with the center of the heating plate 2 as the center, the diameter of the circle containing the outer edge of the second arc area 42 is the fifth diameter D5, and the ratio of the fifth diameter D5 to the diameter D6 of the heating plate 2 is the fifth ratio. The fifth ratio is greater than or equal to 0.4 and less than or equal to 1. Optionally, the fifth ratio is greater than or equal to 0.6 and less than or equal to 0.9.

[0156] The heating power of the heating plate 2 includes at least the following power distribution types: first power (300W~450W), second power (450W~680W), and third power (680W~1200W).

[0157] When both the first arc face 30 and the second arc face 20 are arched upwards:

[0158] The radius of curvature of the first arc surface region 40 is greater than or equal to 500 mm and less than or equal to 900 mm. Optionally, the radius of curvature of the first arc surface region 40 is greater than or equal to 650 mm and less than or equal to 850 mm, and the second radius of curvature corresponding to the heating plate 2 is greater than or equal to the first radius of curvature corresponding to the pot body 3. The radius of curvature of the second arc surface region 42 is greater than or equal to 500 mm and less than or equal to 900 mm. Optionally, the radius of curvature of the second arc surface region 42 is greater than or equal to 600 mm and less than or equal to 700 mm, and the second radius of curvature corresponding to the heating plate 2 is less than the first radius of curvature corresponding to the pot body 3.

[0159] When the mating arc surface area is divided by the annular arc surface 44, the radius of curvature of the first arc surface area 40 is greater than or equal to 500 mm and less than or equal to 900 mm. Optionally, the radius of curvature of the first arc surface area 40 is greater than or equal to 550 mm and less than or equal to 750 mm, and the second radius of curvature of the heating plate 2 at the annular arc surface 44 is equal to the first radius of curvature of the pot body 3.

[0160] The radius of curvature of the third arc surface region 46 is greater than or equal to 5 mm and less than or equal to 50 mm. Optionally, the radius of curvature of the third arc surface region 46 is greater than or equal to 10 mm and less than or equal to 30 mm. The second ratio is greater than or equal to 0.4 and less than or equal to 0.6. The third ratio is greater than or equal to 0.6 and less than or equal to 0.8.

[0161] When both the first arc face 30 and the second arc face 20 are concave:

[0162] The radius of curvature of the first arc surface region 40 is greater than or equal to 50 mm and less than or equal to 900 mm. Optionally, the radius of curvature of the first arc surface region 40 is greater than or equal to 50 mm and less than or equal to 300 mm, and the second radius of curvature of the heating plate 2 is less than or equal to the first radius of curvature of the pot body 3. The radius of curvature of the second arc surface region 42 is greater than or equal to 50 mm and less than or equal to 900 mm. Optionally, the radius of curvature of the second arc surface region 42 is greater than or equal to 100 mm and less than or equal to 300 mm, and the second radius of curvature of the heating plate 2 is greater than the first radius of curvature of the pot body 3.

[0163] When the mating arc surface area is divided by the annular arc surface 44, the radius of curvature of the annular arc surface 44 is greater than or equal to 50 mm and less than or equal to 900 mm. Optionally, the radius of curvature of the annular arc surface 44 is greater than or equal to 50 mm and less than or equal to 300 mm, and the second radius of curvature of the heating plate 2 at the annular arc surface 44 is equal to the first radius of curvature of the pot body 3.

[0164] The diameter D6 of heating plate 2:

[0165] When the heating power of the heating plate 2 is the first power (300W~450W): the diameter D6 of the heating plate 2 is greater than or equal to 100mm and less than or equal to 160mm. Optionally, the diameter D6 of the heating plate 2 is greater than or equal to 120mm and less than or equal to 140mm.

[0166] When the heating power of the heating plate 2 is the second power (450W~680W): the diameter D6 of the heating plate 2 is greater than or equal to 120mm and less than or equal to 180mm. Optionally, the diameter D6 of the heating plate 2 is greater than or equal to 135mm and less than or equal to 165mm.

[0167] When the heating power of the heating plate 2 is the third power (680W~1200W): the diameter D6 of the heating plate 2 is greater than or equal to 150mm and less than or equal to 220mm. Optionally, the diameter D6 of the heating plate 2 is greater than or equal to 160mm and less than or equal to 200mm.

[0168] Optionally, when the mating arc surface area is divided by the annular arc surface 44, the annular arc surface 44 and the cast aluminum area surrounding the heating tube 22 have an overlapping area in the vertical projection direction. Optionally, the projection of the annular arc surface 44 in the vertical direction covers the projection of the cast aluminum area surrounding the heating tube 22.

[0169] In this utility model, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0170] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0171] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cooking utensil, characterized in that, include: The pot body, wherein the outer bottom wall of the pot body includes a first arcuate portion; A heating plate is disposed at the bottom of the pot body. The side of the heating plate facing the pot body includes a second arc-shaped surface. The second arc-shaped surface is disposed opposite to the first arc-shaped surface and is adapted to the first arc-shaped surface. The temperature controller is located in the middle of the heating plate; The first arcuate surface and the second arcuate surface are in circumferential contact at the target position, and the target position divides the first arcuate surface and the second arcuate surface into a first arcuate area located on the inner side and a second arcuate area located on the outer side, with the second arcuate area surrounding the first arcuate area; Specifically, within the second arcuate region, the first arcuate portion and the second arcuate portion are at least partially spaced apart; within the first arcuate region, the first arcuate portion and the second arcuate portion are at least partially spaced apart.

2. The cooking utensil according to claim 1, characterized in that, The first arc surface area and the second arc surface area corresponding to the first arc surface area both arch towards the pot body, or the first arc surface area protrudes towards the heating plate, and the second arc surface area is recessed away from the pot body; Both the first and second arc-shaped surfaces corresponding to the second arc-shaped area arch towards the inside of the pot, or the first arc-shaped surface protrudes towards the heating plate, and the second arc-shaped surface is recessed away from the pot.

3. The cooking utensil according to claim 2, characterized in that, The radius of curvature of the first arcuate portion is a first radius of curvature, and the radius of curvature of the second arcuate portion is a second radius of curvature; When both the first arc-shaped portion and the second arc-shaped portion corresponding to the first arc-shaped area arch towards the inside of the pot, the second radius of curvature corresponding to the first arc-shaped area is greater than the first radius of curvature. When the first arc surface area corresponding to the first arc surface area protrudes towards the heating plate, and the second arc surface area is recessed away from the pot body, the second radius of curvature corresponding to the first arc surface area is smaller than the first radius of curvature. When both the first arc-shaped portion and the second arc-shaped portion corresponding to the second arc-shaped area arch towards the inside of the pot, the second radius of curvature corresponding to the second arc-shaped area is smaller than the first radius of curvature. When the first arc surface corresponding to the second arc surface area protrudes towards the heating plate and the second arc surface area is recessed away from the pot body, the second radius of curvature corresponding to the second arc surface area is greater than the first radius of curvature.

4. The cooking utensil according to claim 3, characterized in that, In the first and second arc-shaped surfaces corresponding to the second arc-shaped surface region: the difference between the first radius of curvature and the second radius of curvature is greater than or equal to 10 mm and less than or equal to 400 mm; and / or In the first arc surface area and the second arc surface area corresponding to the first arc surface area: the difference between the first radius of curvature and the second radius of curvature is greater than or equal to 10 mm and less than or equal to 400 mm.

5. The cooking utensil according to claim 4, characterized in that, When both the first and second arcuate surfaces arch towards the inside of the pot: The first radius of curvature corresponding to the first arc surface area is greater than or equal to 500 mm and less than or equal to 900 mm, and the second radius of curvature is greater than or equal to 500 mm and less than or equal to 900 mm; The first radius of curvature corresponding to the second arc surface area is greater than or equal to 500 mm and less than or equal to 900 mm, and the second radius of curvature is greater than or equal to 500 mm and less than or equal to 900 mm. When the first arcuate portion protrudes towards the heating plate, and the second arcuate portion is recessed away from the pot body: The first radius of curvature corresponding to the first arc surface area is greater than or equal to 50 mm and less than or equal to 900 mm, and the second radius of curvature is greater than or equal to 50 mm and less than or equal to 900 mm. The first radius of curvature corresponding to the second arc surface area is greater than or equal to 50 mm and less than or equal to 900 mm, and the second radius of curvature is greater than or equal to 50 mm and less than or equal to 900 mm.

6. The cooking utensil according to claim 3, characterized in that, Both the first arc surface area and the second arc surface area are arranged in a ring shape. The gap distance between the first arc surface area and the second arc surface area corresponding to the outer edge of the second arc surface area is greater than or equal to 0.04 mm and less than or equal to 30 mm. Wherein, the gap distance between the first arc-shaped surface and the second arc-shaped surface corresponding to the inner edge of the first arc-shaped surface area is greater than or equal to 0.04 mm and less than or equal to 30 mm.

7. The cooking utensil according to claim 3, characterized in that, When both the first and second arcuate surfaces arch towards the inside of the pot: A third arcuate region is also constructed between the first arcuate region and the second arcuate region, and the third arcuate region surrounds the periphery of the second arcuate region. The first arc surface corresponding to the third arc surface area protrudes outward from the pot body, and the second arc surface area is recessed in the direction away from the pot body, and the first arc surface area and the second arc surface area corresponding to the third arc surface area are spaced apart.

8. The cooking utensil according to claim 7, characterized in that, The gap distance between the first arc-shaped part and the second arc-shaped part corresponding to the outer edge of the third arc-shaped part is greater than or equal to 0.04 mm and less than or equal to 30 mm; the gap distance between the first arc-shaped part and the second arc-shaped part corresponding to the outer edge of the second arc-shaped part is greater than or equal to 0.04 mm and less than or equal to 0.2 mm. and / or The first arcuate portion corresponding to the second arcuate region is connected to the first arcuate portion corresponding to the third arcuate region, and the second arcuate portion corresponding to the second arcuate region is connected to the second arcuate portion corresponding to the third arcuate region; and / or The first radius of curvature corresponding to the third arc surface region is greater than or equal to 5 mm and less than or equal to 50 mm, and the second radius of curvature corresponding to the third arc surface region is greater than or equal to 5 mm and less than or equal to 50 mm.

9. The cooking utensil according to any one of claims 1 to 8, characterized in that, The first and second arcuate surfaces are in annular contact at the target location; or The first arcuate surface and the second arcuate surface are in annular contact at the target position, and the first radius of curvature of the first arcuate surface at the target position is the same as the second radius of curvature of the second arcuate surface.

10. The cooking utensil according to claim 9, characterized in that, The heating plate also includes: A heating element for supplying heat to the pot body, the heating element being at least partially positioned opposite the target location.

11. The cooking utensil according to claim 10, characterized in that, When the first arcuate surface and the second arcuate surface are in annular contact at the target position, the target position is an annular arcuate surface, and in the projection along the vertical direction of the cooking appliance, the annular arcuate surface covers at least a portion of the heating tube.

12. The cooking utensil according to claim 10, characterized in that, With the center of the heating plate as the point: The diameter of the circle containing the geometric center of the heating tube is a first diameter, and the ratio of the first diameter to the diameter of the heating plate is a first ratio. When the first arcuate portion and the second arcuate portion are in circular contact at the target position, the diameter of the circle where the target position is located is the second diameter, and the ratio of the second diameter to the diameter of the heating plate is the second ratio value. When the first arcuate surface and the second arcuate surface are in annular contact at the target position: the target position is an annular arcuate surface, the diameter of the circle containing the inner edge of the annular arcuate surface is the third diameter, the diameter of the circle containing the outer edge of the annular arcuate surface is the fourth diameter, the ratio of the third diameter to the diameter of the heating plate is the third ratio, and the ratio of the fourth diameter to the diameter of the heating plate is the fourth ratio. Wherein, the first ratio is greater than or equal to 0.4 and less than or equal to 1, the second ratio is greater than or equal to 0.2 and less than or equal to 0.8, the third ratio is greater than or equal to 0.4 and less than or equal to 0.6, and the fourth ratio is greater than or equal to 0.6 and less than or equal to 0.

9.

13. The cooking utensil according to claim 12, characterized in that, The third ratio is less than the first ratio, and the first ratio is greater than the fourth ratio.

14. The cooking utensil according to claim 13, characterized in that, When both the first and second arcuate surfaces arch towards the inside of the pot: The first radius of curvature and the second radius of curvature corresponding to the annular arc surface are both greater than or equal to 500 mm and less than or equal to 900 mm; When the first arcuate portion protrudes towards the heating plate, and the second arcuate portion is recessed away from the pot body: The first radius of curvature and the second radius of curvature corresponding to the annular arc surface are both greater than or equal to 50 mm and less than or equal to 900 mm.

15. The cooking utensil according to any one of claims 1 to 8, characterized in that, When the heating power of the heating plate is greater than or equal to 300W and less than or equal to 450W, the diameter of the heating plate is greater than or equal to 100mm and less than or equal to 160mm. When the heating power of the heating plate is greater than or equal to 450W and less than or equal to 680W: the diameter of the heating plate is greater than or equal to 120mm and less than or equal to 180mm. When the heating power of the heating plate is greater than or equal to 680W and less than or equal to 1200W: the diameter of the heating plate is greater than or equal to 150mm and less than or equal to 220mm.

16. The cooking utensil according to any one of claims 1 to 8, characterized in that, Also includes: The housing, the pot body, and the heating plate are all disposed within the housing; and / or The cooking appliance includes any one of a rice cooker, an electric pressure cooker, or an electric slow cooker.

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