Heat disc and cooking appliance

Abstract

The utility model provides a kind of heating disc and cooking utensil, heating disc is used for cooking utensil, cooking utensil includes pot body, heating disc is used to heat pot body, heating disc includes: disc body, disc body is equipped with through-hole, through-hole is used to install temperature controller, disc body includes the first heat conduction section, second heat conduction section and third heat conduction section connected in sequence, the first heat conduction section is surrounded in the outside of second heat conduction section, second heat conduction section is surrounded in the outside of third heat conduction section, third heat conduction section is surrounded around through-hole;Heating pipe, it is located in second heat conduction section;Wherein, the thickness of the first heat conduction section is less than the thickness of third heat conduction section.The utility model provides heating disc, reduces the temperature difference of the side surface of heating disc close to pot body, improves the heating uniformity of heating disc, and then improve the temperature difference between the middle part of pot body and the outer ring of pot body, so that the food material in pot body is heated more evenly.

Description

Technical Field

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

[0002] Currently, such as Figure 10 As shown, the heat transfer path of the heating plate 1' in the related technology is: heating tube 3' — the plate body of the heating plate 1' — the pot body 2'. Since the heating tube 3' is arranged in a ring, the cast aluminum substrate in the corresponding area forms an axial high temperature concentration area B, which causes the rice grains in the high temperature area to be over-gelatinized, while the gelatinization rate of the rice grains in the central low temperature area is low. Furthermore, since the thermostat is installed in the through hole of the heating plate 1', it disrupts the continuity of heat conduction in the central area of ​​the heating plate 1', resulting in a lower temperature on the surface of the plate body near the pot body 2' between the heating tube 3' and the through hole, which in turn results in a lower heating temperature of the rice grains in the central area of ​​the pot body 2'. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0004] Therefore, the first aspect of this utility model provides a heating plate.

[0005] A second aspect of this utility model also provides a cooking utensil.

[0006] In view of the above, the first aspect of this utility model provides a heating plate for a cooking utensil, the cooking utensil including a pot body, the heating plate for heating the pot body, the heating plate including: a plate body, the plate body having a through hole for installing a thermostat, the plate body including a first heat-conducting section, a second heat-conducting section and a third heat-conducting section connected in sequence, the first heat-conducting section surrounding the outside of the second heat-conducting section, the second heat-conducting section surrounding the outside of the third heat-conducting section, the third heat-conducting section surrounding the through hole; a heating tube disposed in the second heat-conducting section; wherein, the thickness of the first heat-conducting section is less than the thickness of the third heat-conducting section.

[0007] The heating plate provided by this utility model includes a plate body and a heating tube. The plate body has a through hole for installing a thermostat to detect and control the temperature of the pot. The plate body includes a first heat-conducting section, a second heat-conducting tube, and a third heat-conducting section. The first heat-conducting section surrounds the outside of the second heat-conducting section, the second heat-conducting section surrounds the outside of the third heat-conducting section, and the third heat-conducting section surrounds the through hole. This arrangement places the first heat-conducting section closer to the outer side of the bottom wall of the pot, while the third heat-conducting section is closer to the middle of the bottom wall. Positioning the heating tube in the second heat-conducting section allows the heat generated by the heating tube to be transferred to both sides of the first and third heat-conducting sections, reducing the temperature difference between the highest and lowest temperature positions on the heating plate, thereby reducing the temperature difference between various locations within the pot. Furthermore, the thickness of the first heat-conducting section is less than that of the third heat-conducting section, which increases the thickness of the third heat-conducting section and thus increases its volume. This results in an increase in the heat output of the third heat-conducting section compared to related technologies, balancing the heat conduction of the first and third heat-conducting sections, reducing the temperature difference on the side of the heating plate closest to the pot body, improving the heating uniformity of the heating plate, and further improving the temperature difference between the middle and outer ring of the pot body, making the food inside the pot heated more evenly.

[0008] In some embodiments, optionally, the thickness of the first thermally conductive segment at the end closest to the second thermally conductive segment is d1, and the thickness of the first thermally conductive segment at the end furthest from the second thermally conductive segment is d2; the thickness of the third thermally conductive segment at the end closest to the second thermally conductive segment is d3, and the thickness of the third thermally conductive segment at the end furthest from the second thermally conductive segment is d4; wherein d1 is greater than d2, d3 is greater than d4, and d1 is less than d3.

[0009] In this embodiment, the thickness d1 of the first heat-conducting segment near the second heat-conducting segment is greater than the thickness d2 of the first heat-conducting segment away from the second heat-conducting segment, and the thickness d3 of the third heat-conducting segment near the second heat-conducting segment is greater than the thickness d4 of the third heat-conducting segment away from the second heat-conducting segment. This results in a larger thickness of the first and third heat-conducting segments near the second heat-conducting segment, which allows for rapid heat transfer from the heating element, preventing heat concentration at the location of the heating element. Furthermore, the thickness d3 of the third heat-conducting segment is greater than the thickness d1 of the first heat-conducting segment, increasing the thickness of the third heat-conducting segment and thus its volume, thereby balancing the heat conduction between the first and third heat-conducting segments.

[0010] In some embodiments, d1 and d2 may optionally satisfy the following formula: 1≤d1 / d2≤2.

[0011] In this embodiment, if the ratio of d1 to d2 is too large, it will result in an excessive thickness difference in the first heat-conducting section, affecting the heat transfer of the portion of the first heat-conducting section away from the heating tube and increasing the manufacturing difficulty of the heating plate. Therefore, setting the ratio of d1 to d2 to be greater than or equal to 1 and less than or equal to 2 can both prevent heat from concentrating in the heating tube area and ensure the heat transfer of the first heat-conducting section away from the heating tube area. At the same time, it can also facilitate the manufacturing of the heating plate and reduce the processing difficulty.

[0012] In some embodiments, d3 and d4 may optionally satisfy the following formula: 1.2 ≤ d3 / d4 ≤ 2.5.

[0013] In this embodiment, if the ratio of d3 to d4 is too large, it will result in an excessive thickness difference in the third heat-conducting section, affecting the heat transfer of the portion of the third heat-conducting section away from the heating tube and increasing the manufacturing difficulty of the heating plate. Therefore, setting the ratio of d3 to d4 to be greater than or equal to 1.2 and less than or equal to 2.5 can both prevent heat from concentrating in the heating tube area and ensure the heat transfer of the third heat-conducting section away from the heating tube area. At the same time, it can also facilitate the manufacturing of the heating plate and reduce the processing difficulty.

[0014] In some embodiments, optionally, the thickness of the first thermally conductive section gradually decreases from one end near the second thermally conductive section to one end away from the second thermally conductive section; and / or the thickness of the third thermally conductive section gradually decreases from one end near the second thermally conductive section to one end away from the second thermally conductive section.

[0015] In this embodiment, the thickness of the first heat-conducting section gradually decreases from the inside (i.e., the end closer to the second heat-conducting section) to the outside (i.e., the end farther away from the second heat-conducting section), so that the thickness of the first heat-conducting section gradually changes, avoiding gradient design and facilitating the processing and manufacturing of the heating plate. In addition, the thicker inner edge enhances the ability of the first heat-conducting section to absorb heat from the second heat-conducting section, making it easier to quickly transfer the heat generated by the heating tube to the first heat-conducting section, avoiding the problem of uneven heating of food in the pot caused by heat concentration in the second heat-conducting section. At the same time, the thinner outer edge reduces the resistance to heat transfer to the outside, allowing heat to be quickly transferred to the entire first heat-conducting section, improving heat conduction efficiency and heat uniformity. Similarly, the thickness of the third heat-conducting section gradually decreases from the outside (i.e., the end closer to the second heat-conducting section) to the inside (i.e., the end farther away from the second heat-conducting section), making the thickness of the third heat-conducting section gradually change, which facilitates the processing and manufacturing of the heating plate. In addition, the thicker outer edge of the third heat-conducting section enhances its ability to absorb heat from the second heat-conducting section, while the thinner inner edge reduces the resistance to heat transfer to the inside, allowing heat to be quickly transferred throughout the third heat-conducting section, improving heat conduction efficiency and heat uniformity.

[0016] In some embodiments, optionally, the first thermally conductive section has a uniform thickness structure from one end near the second thermally conductive section to one end away from the second thermally conductive section; and / or the third thermally conductive section has a uniform thickness structure from one end near the second thermally conductive section to one end away from the second thermally conductive section.

[0017] In this embodiment, the first heat-conducting section is configured with a uniform thickness from the end closest to the second heat-conducting section to the end furthest from the second heat-conducting section, and / or the third heat-conducting section is configured with a uniform thickness from the end closest to the second heat-conducting section to the end furthest from the second heat-conducting section. This uniform thickness design ensures the uniformity and stability of heat absorption from the second heat-conducting section, which houses the heating element, reducing heat flow fluctuations and localized overheating that may result from thickness variations, and contributing to a more uniform temperature distribution around the pot.

[0018] In some embodiments, optionally, the volume of the first heat-conducting segment is equal to the volume of the third heat-conducting segment, or the difference between the volume of the first heat-conducting segment and the volume of the third heat-conducting segment is less than or equal to the target volume difference.

[0019] In this embodiment, the volume of the first heat-conducting section is equal to the volume of the third heat-conducting section, or the difference between the volumes of the first and third heat-conducting sections is less than or equal to the target volume difference, so that the volumes of the first and third heat-conducting sections are the same or close, thereby making the heat of the first and third heat-conducting sections the same or close. At the same time, the thickness of the first heat-conducting section is less than the thickness of the third heat-conducting section, so that the difference between the cross-sectional areas of the first and third heat-conducting sections is reduced, thereby making the temperatures of the first and third heat-conducting sections facing the pot body equal or close, so as to reduce the temperature difference of the pot body corresponding to the first and third heat-conducting sections.

[0020] In some embodiments, optionally, the second heat-conducting section includes a wrapping portion located on the side of the plate away from the pot body and arching towards the side away from the pot body, the wrapping portion wrapping around the outside of the heating tube; wherein, along the height direction of the heating plate, the minimum thickness of the wrapping portion on the side of the heating tube away from the pot body is less than the thickness of the third heat-conducting section.

[0021] In this embodiment, the second heat-conducting section includes a wrapping portion that encloses the heating tube, allowing more heat from the heating tube to be transferred to the pot body and reducing the heat radiated from the heating tube to the outside air. Specifically, along the height of the heating plate, the side of the wrapping portion opposite the pot body where the heating tube is located radiates heat to the side of the heating plate opposite the pot body, thus reducing the heat transfer rate to the pot body. Therefore, the minimum thickness of the wrapping portion on the side of the heating tube opposite the pot body that radiates heat to the side of the heating plate opposite the pot body is set to be less than the thickness of the third heat-conducting section to reduce the heat transferred from the wrapping portion to the outside air, allowing more heat to be transferred to the pot body and improving the heating efficiency of the heating plate.

[0022] In some embodiments, the minimum distance between the heating tube and the side surface of the heating plate facing the pot body is greater than or equal to 1.5 times d2.

[0023] In this embodiment, if the distance between the heating tube and the side surface of the heating plate facing the pot is too small, the risk of melting of the heating plate during high-power heating will increase. Therefore, the minimum distance between the heating tube and the side surface of the heating plate facing the pot is set to be greater than or equal to 1.5d2 to ensure a safe distance between the heating tube and the heating surface of the heating plate and reduce the risk of melting of the heating plate during high-power heating.

[0024] In some embodiments, optionally, the minimum thickness of the first heat-conducting section is greater than or equal to 3 mm; the minimum thickness of the third heat-conducting section is greater than or equal to 3 mm.

[0025] In this embodiment, if the minimum thickness of the first and third heat-conducting sections is too small, it will reduce the heat storage capacity of the heating plate, thereby reducing the heat transfer efficiency from the heating plate to the pot body. It will also be detrimental to the manufacturing process and increase the risk of melting. Therefore, the minimum thickness of the first and third heat-conducting sections is set to be greater than or equal to 3mm to meet the manufacturing requirements, ensure the heat storage capacity, and reduce the risk of melting.

[0026] In some embodiments, optionally, when the heating power of the heating plate is less than or equal to 400W, the diameter of the plate body is greater than or equal to 100mm and less than or equal to 140mm, the minimum thickness of the first heat-conducting section is equal to 3mm, and the thickness of the third heat-conducting section is greater than or equal to 5.1mm and less than or equal to 7.5mm; when the heating power of the heating plate is greater than 400W and less than or equal to 600W, the diameter of the plate body is greater than 140mm and less than or equal to 170mm, the minimum thickness of the first heat-conducting section is equal to 3mm, and the thickness of the third heat-conducting section is greater than or equal to 3.6mm and less than or equal to 5.1mm; when the heating power of the heating plate is greater than 600W and less than or equal to 1000W, the diameter of the plate body is greater than 170mm and less than or equal to 200mm, the minimum thickness of the first heat-conducting section is equal to 3mm, and the thickness of the third heat-conducting section is greater than or equal to 4.2mm and less than or equal to 4.8mm.

[0027] In this embodiment, when the heating power of the heating plate is less than or equal to 400W, the diameter of the plate is set between 100mm and 140mm, and the minimum thickness of the first heat-conducting section is set to 3mm to reduce the risk of the plate melting. Correspondingly, the thickness of the third heat-conducting section is set to be greater than or equal to 5.1mm and less than or equal to 7.5mm, so that the thickness of the third heat-conducting section is greater than that of the first heat-conducting section, thereby increasing the heat of the third heat-conducting section and reducing the temperature difference between the side of the third heat-conducting section near the pot and the side of the first heat-conducting section near the pot, ensuring the uniformity of heating of the food in the pot. Optionally, when the heating power of the heating plate is greater than 400W and less than or equal to 600W, the diameter of the heating plate is set to be greater than 140mm and less than or equal to 170mm. Then, when the minimum thickness of the first heat-conducting section is 3mm, the thickness of the third heat-conducting section is set between 3.6mm and 5.1mm. Alternatively, when the heating power of the heating plate is greater than 600W and less than or equal to 1000W, the diameter of the plate is greater than or equal to 170mm and less than or equal to 200mm. Then, when the minimum thickness of the first heat-conducting section is 3mm, the thickness of the third heat-conducting section is set between 4.2mm and 4.8mm. This reduces the temperature difference between the side of the third heat-conducting section near the pot and the side of the first heat-conducting section near the pot, ensuring uniform heating of the food inside the pot.

[0028] In some embodiments, the pan body is optionally recessed from the side closest to the pot body to the side away from the pot body.

[0029] In this embodiment, the plate is recessed from the side closest to the pot to the side away from the pot, making the plate a concave plate. This improves the support effect of the heating plate on the pot and ensures the reliability of the positioning between the heating plate and the pot.

[0030] According to a second aspect of the present invention, a cooking utensil is also provided, comprising: a pot body; and a heating plate as described in any of the first aspects, the heating plate being disposed at the bottom of the pot body for heating the pot body.

[0031] The cooking appliance provided in the second aspect of this utility model, since it includes the heating plate proposed in any of the above embodiments, has all the beneficial effects of the heating plate.

[0032] 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

[0033] 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:

[0034] Figure 1One of the structural schematic diagrams of a cooking appliance according to an embodiment of the present invention is shown;

[0035] Figure 2 The second schematic diagram shows the structure of a cooking appliance according to an embodiment of the present invention;

[0036] Figure 3 One of the structural schematic diagrams of the heating plate according to an embodiment of the present invention is shown;

[0037] Figure 4 It shows Figure 3 A sectional view along line AA of the embodiment shown;

[0038] Figure 5 A second schematic diagram of the structure of the heating plate according to an embodiment of the present invention is shown;

[0039] Figure 6 The third schematic diagram shows the structure of the heating plate according to an embodiment of the present invention;

[0040] Figure 7 The fourth schematic diagram shows the structure of the heating plate according to an embodiment of the present invention;

[0041] Figure 8 It shows Figure 2 Temperature detection curves of the pot body at various temperature detection points in the illustrated embodiment.

[0042] Figure 9 This diagram illustrates the heat transfer principle of the heating system of a cooking appliance according to an embodiment of the present invention.

[0043] Figure 10 A schematic diagram of the structure of a cooking appliance according to an embodiment of the related art is shown;

[0044] Figure 11 The temperature detection curves of the pot body at various temperature detection points in the related technology are shown.

[0045] Among them, 1 heating plate, 10 plate body, 102 through hole, 104 first heat conduction section, 106 second heat conduction section, 107 wrapping part, 108 third heat conduction section, 12 heating tube, 14 wiring terminal, 2 pot body, 3 thermostat, 1' heating plate, 2' pot body, 3' heating tube. Detailed Implementation

[0046] 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.

[0047] 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.

[0048] The following reference Figures 1 to 9 The present invention describes a heating plate 1 and a cooking appliance according to some embodiments thereof.

[0049] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, according to one embodiment of the present invention, a heating plate 1 is provided for a cooking utensil. The cooking utensil includes a pot body 2, and the heating plate 1 is used to heat the pot body 2. The heating plate 1 includes: a plate body 10, the plate body 10 having a through hole 102 for installing a thermostat 3, the plate body 10 including a first heat-conducting section 104, a second heat-conducting section 106 and a third heat-conducting section 108 connected in sequence, the first heat-conducting section 104 surrounding the outside of the second heat-conducting section 106, the second heat-conducting section 106 surrounding the outside of the third heat-conducting section 108, and the third heat-conducting section 108 surrounding the through hole 102; and a heating tube 12 disposed in the second heat-conducting section 106; wherein the thickness of the first heat-conducting section 104 is less than the thickness of the third heat-conducting section 108.

[0050] The heating plate 1 provided by this utility model includes a plate body 10 and a heating tube 12. The plate body 10 is provided with a through hole 102 for installing a thermostat 3 to detect and control the temperature of the pot body 2. The plate body 10 includes a first heat-conducting section 104, a second heat-conducting tube, and a third heat-conducting section 108. The first heat-conducting section 104 surrounds the outside of the second heat-conducting section 106, the second heat-conducting section 106 surrounds the outside of the third heat-conducting section 108, and the third heat-conducting section 108 surrounds the through hole 102, so that the first heat-conducting section 104 is closer to the outer side of the bottom wall of the pot body 2 than the third heat-conducting section 108, and the third heat-conducting section 108 is closer to the middle of the bottom wall of the pot body 2. By placing the heating element 12 in the second heat-conducting section 106, the heat generated by the heating element 12 can be transferred to both sides through the second heat-conducting section 106 to the first heat-conducting section 104 and the third heat-conducting section 108. This reduces the temperature difference between the highest and lowest temperature positions on the heating plate 1, thereby reducing the temperature difference between various positions within the pot body 2. Furthermore, the thickness of the first heat-conducting section 104 is less than the thickness of the third heat-conducting section 108, increasing the thickness of the third heat-conducting section 108 and thus increasing its volume. This increases the heat capacity of the third heat-conducting section 108 compared to related technologies, balancing the heat conduction of the first and third heat-conducting sections 104 and 108. This reduces the temperature difference on the surface of the heating plate 1 closest to the pot body 2, improving the heating uniformity of the heating plate 1. Consequently, it improves the temperature difference between the middle and outer ring of the pot body 2, resulting in more even heating of the food within the pot body 2.

[0051] It is understandable that a through hole 102 is provided in the middle of the heating plate 1, and the thermostat 3 is installed in the through hole 102 to detect and control the temperature of the pot body 2. However, the through hole 102 blocks the continuity of heat transfer from the heating plate 1, causing the temperature of the middle part of the bottom wall of the pot body 2 to be lower than the temperature of the outer ring of the bottom wall of the pot body 2, thus affecting the uniformity of heating of the food in the pot body 2. The heating plate 1 proposed in this application increases the thickness of the third heat-conducting section 108 near the middle of the pot body 2, making the thickness of the third heat-conducting section 108 greater than the thickness of the first heat-conducting section 104. Thus, when the heating plate 1 is working, it increases the heat storage capacity of the third heat-conducting section 108 and the heat transferred to the pot body 2, so as to balance the surface temperature values ​​of the first heat-conducting section 104 and the third heat-conducting section 108, thereby balancing the thermal resistance effect caused by the through hole 102.

[0052] It is understandable that, compared to the third heat conduction section 108 without increased thickness, this application increases the volume of the third heat conduction section 108 by increasing its thickness, thereby increasing the heat conduction to the pot body 2 compared to the third heat conduction section 108 without increased thickness, so as to raise the temperature of the middle part of the pot body 2.

[0053] like Figure 4As shown, in some embodiments, optionally, the thickness of the first heat-conducting segment 104 at the end near the second heat-conducting segment 106 is d1, and the thickness of the first heat-conducting segment 104 at the end away from the second heat-conducting segment 106 is d2; the thickness of the third heat-conducting segment 108 at the end near the second heat-conducting segment 106 is d3, and the thickness of the third heat-conducting segment 108 at the end away from the second heat-conducting segment 106 is d4; wherein, d1 is greater than d2, d3 is greater than d4, and d1 is less than d3.

[0054] In this embodiment, the thickness d1 of the first heat-conducting segment 104 near the second heat-conducting segment 106 is greater than the thickness d2 of the first heat-conducting segment 104 away from the second heat-conducting segment 106, and the thickness d3 of the third heat-conducting segment 108 near the second heat-conducting segment 106 is greater than the thickness d4 of the third heat-conducting segment 108 away from the second heat-conducting segment 106. This results in a larger thickness of the first heat-conducting segment 104 and the third heat-conducting segment 108 near the second heat-conducting segment 106, thereby enabling rapid heat transfer from the heating tube 12 and preventing heat concentration at the location of the heating tube 12. Furthermore, the thickness d3 of the third heat-conducting segment 108 is greater than the thickness d1 of the first heat-conducting segment 104, increasing the thickness of the third heat-conducting segment 108 and thus increasing its volume to balance the heat conduction between the first heat-conducting segment 104 and the third heat-conducting segment 108.

[0055] In some embodiments, d1 and d2 may optionally satisfy the following formula: 1≤d1 / d2≤2.

[0056] In this embodiment, if the ratio of d1 to d2 is too large, the thickness difference of the first heat-conducting section 104 will be too large, affecting the heat of the part of the first heat-conducting section 104 away from the heating tube 12, and also increasing the manufacturing difficulty of the heating plate 1. Therefore, setting the ratio of d1 to d2 to be greater than or equal to 1 and less than or equal to 2 can both avoid heat concentration in the area of ​​the heating tube 12 and ensure the heat of the first heat-conducting section 104 away from the area of ​​the heating tube 12. At the same time, it can also facilitate the manufacturing of the heating plate 1 and reduce the processing difficulty.

[0057] In some embodiments, d3 and d4 may optionally satisfy the following formula: 1.2 ≤ d3 / d4 ≤ 2.5.

[0058] In this embodiment, if the ratio of d3 to d4 is too large, it will result in an excessive thickness difference in the third heat-conducting section 108, affecting the heat transfer of the portion of the third heat-conducting section 108 away from the heating tube 12 and increasing the manufacturing difficulty of the heating plate 1. Therefore, setting the ratio of d3 to d4 to be greater than or equal to 1.2 and less than or equal to 2.5 can both prevent heat from concentrating in the area of ​​the heating tube 12 and ensure the heat transfer of the third heat-conducting section 108 away from the area of ​​the heating tube 12. At the same time, it can also facilitate the manufacturing of the heating plate 1 and reduce the processing difficulty.

[0059] like Figure 4 As shown, in some embodiments, optionally, the thickness of the first heat-conducting section 104 gradually decreases from one end near the second heat-conducting section 106 to the end away from the second heat-conducting section 106; and / or the thickness of the third heat-conducting section 108 gradually decreases from one end near the second heat-conducting section 106 to the end away from the second heat-conducting section 106.

[0060] In this embodiment, the thickness of the first heat-conducting section 104 gradually decreases from the inside (i.e., the end closer to the second heat-conducting section 106) to the outside (i.e., the end farther away from the second heat-conducting section 106), so that the thickness of the first heat-conducting section 104 gradually changes, avoiding a gradient design, which facilitates the processing and manufacturing of the heating plate 1. In addition, the thicker inner edge enhances the ability of the first heat-conducting section 104 to absorb heat from the second heat-conducting section 106, making it easier to quickly transfer the heat generated by the heating tube 12 to the first heat-conducting section 104, avoiding the problem of uneven heating of the food in the pot body 2 caused by the heat concentrating in the second heat-conducting section 106. At the same time, the thinner outer edge reduces the resistance to heat transfer to the outside, so that the heat is quickly transferred to the entire first heat-conducting section 104, improving the heat conduction efficiency and heat uniformity. Similarly, the thickness of the third heat-conducting section 108 gradually decreases from the outside (i.e., the end closer to the second heat-conducting section 106) to the inside (i.e., the end farther away from the second heat-conducting section 106), making the thickness of the third heat-conducting section 108 gradually change, which facilitates the processing and manufacturing of the heating plate 1. The thicker outer edge of the third heat-conducting section 108 enhances the ability of the third heat-conducting section 108 to absorb heat from the second heat-conducting section 106, while the thinner inner edge reduces the resistance to heat transfer to the inside, so that heat can be quickly transferred to the entire third heat-conducting section 108, improving the heat conduction efficiency and heat uniformity.

[0061] In some embodiments, the first thermally conductive section 104 may have a uniform thickness structure from one end near the second thermally conductive section 106 to one end away from the second thermally conductive section 106; and / or the third thermally conductive section 108 may have a uniform thickness structure from one end near the second thermally conductive section 106 to one end away from the second thermally conductive section 106.

[0062] In this embodiment, the first heat-conducting section 104 is configured with a uniform thickness from the end closest to the second heat-conducting section 106 to the end furthest from the second heat-conducting section 106, and / or the third heat-conducting section 108 is configured with a uniform thickness from the end closest to the second heat-conducting section 106 to the end furthest from the second heat-conducting section 106. This uniform thickness design ensures the uniformity and stability of heat absorption from the second heat-conducting section 106, which houses the heating tube 12, by the first heat-conducting section 104 and the third heat-conducting section 108. This reduces heat flow fluctuations and localized overheating that may occur due to thickness variations, contributing to a uniform temperature distribution around the pot body 2.

[0063] In some embodiments, optionally, the volume of the first heat-conducting section 104 is equal to the volume of the third heat-conducting section 108, or the difference between the volume of the first heat-conducting section 104 and the volume of the third heat-conducting section 108 is less than or equal to the target volume difference.

[0064] In this embodiment, the volume of the first heat-conducting section 104 is equal to the volume of the third heat-conducting section 108, or the difference between the volumes of the first heat-conducting section 104 and the third heat-conducting section 108 is less than or equal to the target volume difference, so that the volumes of the first heat-conducting section 104 and the third heat-conducting section 108 are the same or close, thereby making the heat of the first heat-conducting section 104 and the third heat-conducting section 108 the same or close; at the same time, the thickness of the first heat-conducting section 104 is less than the thickness of the third heat-conducting section 108, so that the difference between the cross-sectional area of ​​the first heat-conducting section 104 and the cross-sectional area of ​​the third heat-conducting section 108 is reduced, thereby making the temperatures of the first heat-conducting section 104 and the third heat-conducting section 108 on the side facing the pot body 2 equal or close, so as to reduce the temperature difference of the pot body 2 corresponding to the first heat-conducting section 104 and the third heat-conducting section 108.

[0065] Optionally, the target volume difference can be 1 mm. 3 Up to 200mm 3 Any value in the range.

[0066] Understandably, the small volume difference between the first heat-conducting section 104 and the third heat-conducting section 108 ensures that their heat capacities are matched, avoiding the problems of asynchronous temperature response and local overheating caused by differences in thermal inertia. Meanwhile, the limited cross-sectional area difference between the first heat-conducting section 104 and the third heat-conducting section 108 maintains the balance of the heat flow path, ensuring that the third heat-conducting section 108 can quickly absorb heat through a sufficient cross-sectional area and guide it to the central area, so as to significantly compensate for the problem of low central temperature caused by the "heat island blocking effect". It also enables the first heat-conducting section 104 to efficiently diffuse heat to the edge of the pot body 2, ultimately greatly improving the heating uniformity, thermal efficiency and temperature control accuracy of the entire heating plate 1.

[0067] It should be noted that, assuming the volume of the first heat-conducting section 104 is V1, the thickness of the cross section is da, and the cross-sectional area of ​​the first heat-conducting section 104 is A1, the volume of the third heat-conducting section 108 is V2, the thickness of the cross section is db, the cross-sectional area of ​​the first heat-conducting section 104 is A1, and r2 is the radius of the through hole 102 where the temperature controller 3 is located, which is generally taken as 20mm. According to the formula: Q=ρ×Vi×c×Ti, the heat of the first heat conduction section 104 is Q1=ρ×V1×c×T1, and the heat of the third heat conduction section 108 is Q2=ρ×V2×c×T2, where Q is the heat, ρ is the material density (kg / m³), c is the specific heat capacity (J / (kg·K)), Vi is the volume of the i-th region of the heating plate 1 (correspondingly, V1 is the volume of the first heat conduction section 104, V2 is the volume of the third heat conduction section 108), and Ti is the temperature of the i-th region of the heating plate 1 (correspondingly, T1 is the temperature value of the first heat conduction section 104, and T2 is the temperature value of the third heat conduction section 108).

[0068] The heat Q1 of the first heat conduction section 104 and the heat Q2 of the third heat conduction section 108 satisfy the following formula:

[0069] Formula 1: Q1 / Q2=(ρ×V1×c×T1) / (ρ×V2×c×T2)=(V1×T1) / (V2×T2).

[0070] Assuming T1 = T2, then:

[0071] Formula 2: Q1 / Q2 = V1 / V2.

[0072] According to Fourier's heat conduction formula: ;

[0073] Where q represents the heat transferred per unit time, k is the thermal conductivity of the material (high thermal conductivity materials such as aluminum alloys are preferred), and A is the cross-sectional area (m²). 2 ), For the rate of change of temperature over time, correspondingly, The rate of temperature change of the first heat-conducting section 104 over time. Let A1 be the rate of temperature change of the third heat-conducting section 108 over time, and A2 be the cross-sectional area of ​​the first heat-conducting section 104 and the third heat-conducting section 108. Assume that the temperature changes of the first heat-conducting section 104 and the third heat-conducting section 108 are equal or approximately the same. Then, the heat q1 transferred per unit time in the first heat conduction section 104 and the heat q2 transferred per unit time in the third heat conduction section 108 satisfy the following formula:

[0074] ;

[0075] Therefore, when the heating plate 1 is heating, the heat generated by the first heat-conducting section 104 and the third heat-conducting section 108 is: Q1=q1×t, Q2=q2×t, where t is time. That is, the heat Q1 of the first heat-conducting section 104 and the heat Q2 of the third heat-conducting section 108 satisfy the following formula:

[0076] Formula 3: Q1 / Q2=q1 / q2=A1 / A2=V1 / V2.

[0077] As can be seen from Formula 3, if the temperatures of the first heat-conducting section 104 and the third heat-conducting section 108 are equal or close, the volume difference between the volume V1 of the first heat-conducting section 104 and the volume V2 of the third heat-conducting section 108 needs to be minimized as much as possible. Since the power of the heating plate 1 determines the diameter of the heating tube 12, it affects the radial length of the first heat-conducting section 104 and the third heat-conducting section 108 (that is, the annular radius of the first heat-conducting section 104 and the third heat-conducting section 108). In other words, when the power of the heating plate 1 is determined, the radial length of the first heat-conducting section 104 and the third heat-conducting section 108 is determined. Therefore, if the volume V1 of the first heat-conducting section 104 is the same as or approximately the same as the volume V2 of the third heat-conducting section 108, da and db need to be set to be unequal, that is, the thickness is non-uniform, and db is greater than da.

[0078] That is, in the embodiments proposed in this application, the thickness of the third heat-conducting section 108 is greater than the thickness of the first heat-conducting section 104, so that the volume of the first heat-conducting section 104 and the volume of the third heat-conducting section 108 are set to be the same or close, and the difference between the cross-sectional area of ​​the first heat-conducting section 104 and the cross-sectional area of ​​the third heat-conducting section 108 is also reduced, so that the temperatures of the first heat-conducting section 104 and the third heat-conducting section 108 are equal or close, thereby reducing the temperature difference between the surface of the heating plate 1 and the pot body 2, improving the temperature uniformity of the heating surface of the heating plate 1, and thus improving the cooking effect.

[0079] Understandably, in related technologies, the volume V1 of the first heat-conducting section is generally set to be larger than the volume V2 of the third heat-conducting section, as shown in Table 1 below; the cross-sectional area S1 of the first heat-conducting section is set to be larger than the cross-sectional area S2 of the third heat-conducting section, as shown in Table 2 below. This results in different heat conduction capacities between the first and third heat-conducting sections, affecting the temperature uniformity of the heating plate near the pot body. However, in the embodiment proposed in this application, the volume of the first heat-conducting section 104 and the volume of the third heat-conducting section 108 are set to be the same or nearly the same, making the temperatures of the first heat-conducting section 104 and the third heat-conducting section 108 equal or close, thereby reducing the temperature difference between the surface of the heating plate 1 and the pot body 2.

[0080] Table 1

[0081]

[0082] Table 2

[0083]

[0084] Optionally, the target volume difference and target area difference can be set according to the actual situation. Optionally, the target volume difference can be 100mm. 3 Optionally, the target area difference can be 100mm. 2 .

[0085] Optionally, the volume of the first heat-conducting section 104 is the same as or close to the volume of the third heat-conducting section 108.

[0086] It should be noted that the cross-sectional area of ​​the first heat-conducting section 104 is the area of ​​the cross-section of the first heat-conducting section 104 along the center line direction of the through hole 102, and the cross-sectional area of ​​the third heat-conducting section 108 is the area of ​​the cross-section of the third heat-conducting section 108 along the center line direction of the through hole 102.

[0087] like Figure 4 As shown, in some embodiments, optionally, the second heat-conducting section 106 includes a wrapping portion 107, which is located on the side of the plate 10 away from the pot body 2 and arches towards the side away from the pot body 2, and the wrapping portion 107 wraps around the outside of the heating tube 12; wherein, along the height direction of the heating plate 1, the minimum thickness d6 of the wrapping portion 107 on the side of the heating tube 12 away from the pot body 2 is less than the thickness of the third heat-conducting section 108.

[0088] In this embodiment, the second heat-conducting section 106 includes a wrapping portion 107 that wraps around the heating tube 12, allowing more heat from the heating tube 12 to be transferred to the pan body 10 and reducing the heat radiated by the heating tube 12 to the outside air. Specifically, along the height direction of the heating pan 1, the side of the wrapping portion 107 opposite to the pot body 2 radiates heat to the side of the heating pan 1 opposite to the pot body 2, thereby reducing the heat transfer rate to the pot body 2. Therefore, the minimum thickness d6 of the wrapping portion 107 on the side of the heating tube 12 opposite to the pot body 2 is set to be less than the thickness of the third heat-conducting section 108, to reduce the heat transferred by the wrapping portion 107 to the outside air, allowing more heat to be transferred to the pot body 2 and improving the heating efficiency of the heating pan 1.

[0089] In some embodiments, the minimum distance d5 between the heating tube 12 and the side surface of the heating plate 1 facing the pot body 2 is greater than or equal to 1.5d2.

[0090] In this embodiment, if the distance d5 between the heating tube 12 and the side surface of the heating plate 1 facing the pot body 2 is too small, the risk of melting the plate during high-power heating will increase. Therefore, the minimum distance d5 between the heating tube 12 and the side surface of the heating plate 1 facing the pot body 2 is set to be greater than or equal to 1.5d2 to ensure a safe distance between the heating tube 12 and the heating surface of the heating plate 1 and reduce the risk of melting the plate during high-power heating.

[0091] In some embodiments, the minimum thickness of the first heat-conducting section 104 is greater than or equal to 3 mm; the minimum thickness of the third heat-conducting section 108 is greater than or equal to 3 mm.

[0092] In this embodiment, if the minimum thickness of the first heat-conducting section 104 and the third heat-conducting section 108 is too small, it will reduce the heat storage capacity of the heating plate 1, thereby reducing the heat transfer efficiency from the heating plate 1 to the pot body 2. It will also be detrimental to the manufacturing process and increase the risk of melting. Therefore, the minimum thickness of the first heat-conducting section 104 and the third heat-conducting section 108 is set to be greater than or equal to 3mm to meet the manufacturing requirements, ensure the heat storage capacity, and reduce the risk of melting.

[0093] In some embodiments, optionally, when the heating power of the heating plate 1 is less than or equal to 400W, the diameter of the plate body 10 is greater than or equal to 100mm and less than or equal to 140mm, the minimum thickness of the first heat-conducting section 104 is equal to 3mm, and the thickness of the third heat-conducting section 108 is greater than or equal to 5.1mm and less than or equal to 7.5mm; when the heating power of the heating plate 1 is greater than 400W and less than or equal to 600W, the diameter of the plate body 10 is greater than 140mm and less than or equal to 170mm, the minimum thickness of the first heat-conducting section 104 is equal to 3mm, and the thickness of the third heat-conducting section 108 is greater than or equal to 3.6mm and less than or equal to 5.1mm; when the heating power of the heating plate 1 is greater than 600W and less than or equal to 1000W, the diameter of the plate body 10 is greater than 170mm and less than or equal to 200mm, the minimum thickness of the first heat-conducting section 104 is equal to 3mm, and the thickness of the third heat-conducting section 108 is greater than or equal to 4.2mm and less than or equal to 4.8mm.

[0094] In this embodiment, when the heating power of the heating plate 1 is less than or equal to 400W, the diameter of the plate body 10 is set between 100mm and 140mm, and the minimum thickness of the first heat-conducting section 104 is set to 3mm to reduce the risk of melting. Correspondingly, the thickness of the third heat-conducting section 108 is set to be greater than or equal to 5.1mm and less than or equal to 7.5mm, so that the thickness of the third heat-conducting section 108 is greater than the thickness of the first heat-conducting section 104, thereby increasing the heat of the third heat-conducting section 108 and reducing the temperature difference between the side of the third heat-conducting section 108 near the pot body 2 and the side of the first heat-conducting section 104 near the pot body 2, ensuring the uniformity of heating of the food in the pot body 2. Optionally, when the heating power of the heating plate 1 is greater than 400W and less than or equal to 600W, the diameter of the heating plate 1 is set to be greater than 140mm and less than or equal to 170mm. Then, when the minimum thickness of the first heat-conducting section 104 is 3mm, the thickness of the third heat-conducting section 108 is set between 3.6mm and 5.1mm. Alternatively, when the heating power of the heating plate 1 is greater than 600W and less than or equal to 1000W, the diameter of the plate body 10 is greater than or equal to 170mm and less than or equal to 200mm. Then, when the minimum thickness of the first heat-conducting section 104 is 3mm, the thickness of the third heat-conducting section 108 is set between 4.2mm and 4.8mm. This reduces the temperature difference between the side of the third heat-conducting section 108 near the pot body 2 and the side of the first heat-conducting section 104 near the pot body 2, ensuring uniform heating of the food inside the pot body 2.

[0095] In some embodiments, the pan body 10 is optionally recessed from the side near the pot body 2 to the side away from the pot body 2.

[0096] In this embodiment, the plate 10 is recessed from the side close to the pot body 2 to the side away from the pot body 2, making the plate 10 a concave plate, which improves the supporting effect of the heating plate 1 on the pot body 2 and ensures the reliability of the positioning between the heating plate 1 and the pot body 2.

[0097] According to one embodiment of the present invention, a cooking utensil is also provided, comprising: a pot body 2; and a heating plate 1 as described in any of the above claims, wherein the heating plate 1 is disposed at the bottom of the pot body 2 for heating the pot body 2.

[0098] The cooking appliance provided by this utility model includes the heating plate 1 proposed in any of the above embodiments, and therefore has all the beneficial effects of the heating plate 1.

[0099] Optionally, the cooking appliance also includes a thermostat 3, which is located in the through hole 102 of the heating plate 1.

[0100] Alternatively, cooking appliances include rice cookers, electric pressure cookers, etc.

[0101] According to some embodiments of this application, optionally, such as Figure 9 As shown, the heating plate 1 supports the pot body 2 and maintains its position. The heating plate 1 serves as the heat source for the rice cooker, and its heat transfer path has three routes:

[0102] Path 1: Heating plate 1 → Pot body 2 → Water → Rice grains, which is a contact conduction process;

[0103] Path 2: Heating plate 1 → Air (bottom of heating plate), which is thermal radiation;

[0104] Path 3: Pot body 2 → Air (air on the outer wall of pot body 2), which is thermal radiation.

[0105] The process of cooking rice in a rice cooker involves the rice grains, soaked in water, being heated evenly and absorbing water to gelatinize. To improve the texture of the rice and avoid the problems of some parts being too soft and others being undercooked or mushy, it is essential to ensure that the rice grains are heated evenly. From the heat transfer path one, it is found that the temperature difference between the high and low temperature zones of the pot body 2 must first be reduced, and the temperature difference on the heating plate 1 must be further reduced. Simultaneously, to improve the energy efficiency of the rice cooker, the useful work of the heating plate 1 in heat transfer path one needs to be increased, while the useless work in heat transfer paths two and three needs to be further reduced.

[0106] like Figure 1 , Figure 6 and Figure 7 As shown, the heating plate 1 includes a heating tube 12, a heat-conducting part (e.g., plate body 10), a wiring terminal 14, etc. The heat-conducting part has a heat transfer surface for transferring heat to the pot body 2 and a heat dissipation surface for radiating heat to the air below the heating plate 1.

[0107] The outer ring of the heating tube 12 has a heat-conducting section 104 of the heating plate 1, and the inner ring has a heat-conducting section 108 of the heating plate 1. The heating tube 12 generates heat and transfers it outward to the first heat-conducting section 104 and inward to the third heat-conducting section 108. Optionally, both the first heat-conducting section 104 and the third heat-conducting section 108 are annular.

[0108] In path one, the main reason for the large temperature difference on the heat transfer surface of the heating plate is the uneven heat flow distribution, which requires optimization of the cross-sectional design of heating plate 1.

[0109] Assume the volume of the first heat-conducting section 104 is V1, the thickness of the cross section is da (including d1 and d2), and the cross-sectional area of ​​the first heat-conducting section 104 is A1. The volume of the third heat-conducting section 108 is V2, the thickness of the cross section is db (including d3 and d4), and the cross-sectional area of ​​the first heat-conducting section 104 is A1. r2 is the radius of the through hole 102 where the thermostat 3 is located, which is generally taken as 20mm. r1 is the distance between the center of the heating tube 2 and the center of the through hole 102. R is the diameter of the outer edge of the heating plate 1. According to the formula: Q=ρ×Vi×c×Ti, the heat of the first heat conduction section 104 is Q1=ρ×V1×c×T1, and the heat of the third heat conduction section 108 is Q2=ρ×V2×c×T2, where Q is the heat, ρ is the material density (kg / m³), c is the specific heat capacity (J / (kg·K)), Vi is the volume of the i-th region of the heating plate 1 (correspondingly, V1 is the volume of the first heat conduction section 104, V2 is the volume of the third heat conduction section 108), and Ti is the temperature of the i-th region of the heating plate 1 (correspondingly, T1 is the temperature value of the first heat conduction section 104, and T2 is the temperature value of the third heat conduction section 108).

[0110] The heat Q1 of the first heat conduction section 104 and the heat Q2 of the third heat conduction section 108 satisfy the following formula:

[0111] Formula 1: Q1 / Q2=(ρ×V1×c×T1) / (ρ×V2×c×T2)=(V1×T1) / (V2×T2).

[0112] Assuming T1 = T2, then:

[0113] Formula 2: Q1 / Q2 = V1 / V2.

[0114] According to Fourier's heat conduction formula: ;

[0115] Where q represents the heat transferred per unit time, k is the thermal conductivity of the material (high thermal conductivity materials such as aluminum alloys are preferred), and A is the cross-sectional area (m²). 2 ), For the rate of change of temperature over time, correspondingly, The rate of temperature change of the first heat-conducting section 104 over time. Let A1 be the rate of temperature change of the third heat-conducting section 108 over time, and A2 be the cross-sectional area of ​​the first heat-conducting section 104 and the third heat-conducting section 108. Assume that the temperature changes of the first heat-conducting section 104 and the third heat-conducting section 108 are equal or approximately the same. Then, the heat q1 transferred per unit time in the first heat conduction section 104 and the heat q2 transferred per unit time in the third heat conduction section 108 satisfy the following formula:

[0116] ;

[0117] Therefore, when the heating plate 1 is heating, the heat generated by the first heat-conducting section 104 and the third heat-conducting section 108 is: Q1=q1×t, Q2=q2×t, where t is time. That is, the heat Q1 of the first heat-conducting section 104 and the heat Q2 of the third heat-conducting section 108 satisfy the following formula:

[0118] Formula 3: Q1 / Q2=q1 / q2=A1 / A2=V1 / V2.

[0119] As can be seen from Formula 3, if the temperatures of the first heat-conducting section 104 and the third heat-conducting section 108 are equal or close, and the volumes of the first heat-conducting section 104 and the third heat-conducting section 108 are equal or close, then da and db need to be set to be unequal, that is, the thickness is non-uniform, and db is greater than da.

[0120] Optionally, the heating plate 1 is manufactured by casting. Considering the optimal processing technology and cost, the minimum thickness of the heating plate 1 is not less than 3mm. The middle area of ​​the heating plate 1 is a cold area, and the heat transfer efficiency needs to be improved. In order to ensure the uniformity of the heating surface temperature of the heating plate 1, the minimum thickness d1 of the first heat-conducting section 104 is set to 3mm, and the thickness d3 of the third heat-conducting section 108 is increased.

[0121] Optionally, when the minimum thickness of the first heat-conducting section 104 is 3.0 mm, the cross-sectional thickness d3 of the third heat-conducting section 108 in the heating plate 1 with different power ranges is shown in Table 3.

[0122] Table 3

[0123]

[0124] Optionally, to avoid heat concentration at the location of the heating tube 12 on the heating plate 1, the cross-sectional thickness d1 of the first heat-conducting section 104 is set to gradually decrease from the end near the heating tube 12 towards the circumferential direction of the maximum diameter of the heating plate (i.e., the end of the first heat-conducting section 104 away from the heating tube 12), and the minimum thickness is not less than 3 mm or d1 is a uniform thickness. The cross-sectional thickness d3 of the third heat-conducting section 108 is set to gradually decrease from the end near the heating tube 12 towards the center of the heating plate (i.e., the end of the third heat-conducting section 108 away from the heating tube 12), and the minimum thickness is not less than 3 mm.

[0125] Optionally, in the first heat-conducting section 104 of the heating plate 1, the cross-sectional thickness gradually decreases from d1 to d2 from the heating tube 12 outwards, or the thickness is uniformly set from the heating tube 12 outwards, and the minimum thickness of d2 is 3mm, satisfying 1≤d1 / d2≤2; in the third heat-conducting section 108, the cross-sectional thickness gradually decreases from d3 to d4 from the end near the heating tube 12 towards the center of the heating plate 1, and the minimum thickness of d4 is 3mm, satisfying 1.2≤d3 / d4≤2.5.

[0126] Optionally, to reduce the heat storage capacity at the bottom of the heating plate 1, according to the formula for calculating heat storage: Q=ρ×Vi×c×Ti, it is necessary to reduce the volume of material covering the area below the heating tube 12. Optionally, the minimum thickness d6 of the heat-conducting part covering the bottom of the heating tube 12 satisfies d6 / d3≤1.

[0127] like Figure 8 and Figure 11 As shown, temperature detection points a1 to a6 are arranged. Compared with the heating plate in related technologies, the temperature difference at each detection point on the bottom of the pot body 2 in the embodiment of this application is reduced by 20°C, thus improving the heating uniformity of the heating plate 1. Wherein, as Figure 11 As shown, a temperature curve graph obtained by measuring temperature points a1 to a6 of a cooking appliance in the related art corresponding to the detection points of this application is displayed. Figure 11 L1 in Figure 8 The a1 detection point in the middle, Figure 11 L2 in Figure 8 The a2 detection point in the middle, Figure 11 L3 in Figure 8 The a3 detection point in the middle, Figure 11 L4 in Figure 8 The a4 detection point in the middle, Figure 11 L5 in Figure 8 The a5 detection point in the middle, Figure 11 L6 in Figure 8 The a6 detection point in the middle. Among them, Figure 8 and Figure 11 The vertical axis represents the temperature value (°C), and the horizontal axis represents the time (s).

[0128] 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.

[0129] 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.

[0130] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A heating plate for a cooking utensil, the cooking utensil comprising a pot body, the heating plate being used to heat the pot body, characterized in that, The heating plate includes: The plate body has a through hole for installing a temperature controller. The plate body includes a first heat-conducting section, a second heat-conducting section and a third heat-conducting section connected in sequence. The first heat-conducting section surrounds the outside of the second heat-conducting section, the second heat-conducting section surrounds the outside of the third heat-conducting section, and the third heat-conducting section surrounds the through hole. The heating element is located in the second heat-conducting section; The thickness of the first heat-conducting section is less than the thickness of the third heat-conducting section.

2. The heating plate according to claim 1, characterized in that, The thickness of the first thermally conductive section at the end closest to the second thermally conductive section is d1, and the thickness of the first thermally conductive section at the end furthest from the second thermally conductive section is d2. The thickness of the third heat-conducting section at the end closest to the second heat-conducting section is d3, and the thickness of the third heat-conducting section at the end furthest from the second heat-conducting section is d4. Among them, d1 is greater than d2, d3 is greater than d4, and d1 is less than d3.

3. The heating plate according to claim 2, characterized in that, d1 and d2 satisfy the following formula: 1≤d1 / d2≤2.

4. The heating plate according to claim 2, characterized in that, d3 and d4 satisfy the following formula: 1.2≤d3 / d4≤2.

5.

5. The heating plate according to claim 2, characterized in that, The thickness of the first heat-conducting section gradually decreases from one end near the second heat-conducting section to the end away from the second heat-conducting section; and / or The thickness of the third heat-conducting section gradually decreases from the end closest to the second heat-conducting section to the end furthest from the second heat-conducting section.

6. The heating plate according to claim 1, characterized in that, The first heat-conducting section has a uniform thickness from the end closest to the second heat-conducting section to the end furthest from the second heat-conducting section; and / or The third heat-conducting section has a uniform thickness from the end closest to the second heat-conducting section to the end furthest from the second heat-conducting section.

7. The heating plate according to any one of claims 1 to 6, characterized in that, The volume of the first heat-conducting segment is equal to the volume of the third heat-conducting segment, or the difference between the volume of the first heat-conducting segment and the volume of the third heat-conducting segment is less than or equal to the target volume difference.

8. The heating plate according to any one of claims 1 to 6, characterized in that, The second heat-conducting section includes a wrapping part, which is located on the side of the plate away from the pot body and arches towards the side away from the pot body. The wrapping part wraps around the outside of the heating tube. Wherein, along the height direction of the heating plate, the minimum thickness of the wrapping part located on the side of the heating tube away from the pot body is less than the thickness of the third heat-conducting section.

9. The heating plate according to claim 8, characterized in that, The minimum distance between the heating tube and the heating plate on the side facing the pot body is greater than or equal to 1.5 times d2.

10. The heating plate according to any one of claims 1 to 6, characterized in that, The minimum thickness of the first heat-conducting section is greater than or equal to 3 mm; The minimum thickness of the third heat-conducting section is greater than or equal to 3 mm.

11. The heating plate according to any one of claims 1 to 6, characterized in that, When the heating power of the heating plate is less than or equal to 400W, the diameter of the plate body is greater than or equal to 100mm and less than or equal to 140mm, the minimum thickness of the first heat-conducting section is equal to 3mm, and the thickness of the third heat-conducting section is greater than or equal to 5.1mm and less than or equal to 7.5mm. When the heating power of the heating plate is greater than 400W and less than or equal to 600W, the diameter of the plate body is greater than 140mm and less than or equal to 170mm, the minimum thickness of the first heat-conducting section is equal to 3mm, and the thickness of the third heat-conducting section is greater than or equal to 3.6mm and less than or equal to 5.1mm. When the heating power of the heating plate is greater than 600W and less than or equal to 1000W, the diameter of the plate body is greater than 170mm and less than or equal to 200mm, the minimum thickness of the first heat-conducting section is equal to 3mm, and the thickness of the third heat-conducting section is greater than or equal to 4.2mm and less than or equal to 4.8mm.

12. The heating plate according to any one of claims 1 to 6, characterized in that, The plate is recessed from the side closest to the pot body to the side away from the pot body.

13. A cooking utensil, characterized in that, include: Pot body; and The heating plate as described in any one of claims 1 to 12 is disposed at the bottom of the pot body and is used to heat the pot body.

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