Cooking utensil

Abstract

The utility model discloses a cooking utensil and relates to the technical field of cooking, the cooking utensil comprises a main body part, a heating assembly and an inner pot, the main body part is provided with a mounting cavity with an opening at the upper end; a heating cavity is defined by the heating assembly, the heating assembly comprises a heating disc and a first heat conduction part, the heating disc comprises a second heat conduction part arranged at the bottom of the mounting cavity and a heating part for heating the second heat conduction part, and the lower end of the first heat conduction part is connected to the upper end of the second heat conduction part; the inner pot is arranged at the bottom of the heating cavity; the heat conduction coefficient of the first heat conduction part is set to be smaller than that of the second heat conduction part, when the heating part conducts heating, heat in the second heat conduction part can be effectively transmitted to the first heat conduction part, condensate water caused by temperature difference is reduced, and meanwhile the heat transmitted from the second heat conduction part to the first heat conduction part is relatively limited; excessive heat is prevented from being transferred to the first heat conduction part, and the situation that the temperature of the side wall of the inner pot is too high is avoided.

Description

Technical Field

[0001] This utility model relates to the field of cooking technology, and in particular to a cooking utensil. Background Technology

[0002] Current cooking appliances, such as rice cookers, primarily utilize two heating technologies: induction heating (IH) and resistance heating. In the latter, the heating element is typically embedded within a cast aluminum plate, such as... Figure 1 As shown. The main limitation of this traditional design is that it only achieves bottom heating, meaning the heat generated by the heating element is transferred to the cast aluminum plate, and then conducted from the cast aluminum plate to the bottom of the inner pot. Because only the bottom is in direct contact with the heating plate, the bottom temperature is higher, while the side walls, lacking direct heating, remain at a lower temperature, resulting in uneven heating. Especially during the heat preservation stage, the excessively low temperature of the inner pot's side walls can cause condensation, causing the rice to absorb moisture, turn white, and even spoil after a long period of time.

[0003] To achieve a more uniform heating effect, existing technologies have incorporated side wall heating elements into rice cooker designs. However, the bottom heating plate and the side wall heating elements usually operate separately and independently. This means that an additional control system is needed to manage the heating process of different parts, which makes the design of components such as the power board more complex and increases costs. At the same time, the side wall heating elements can get too hot, causing the rice cooker's shell to become excessively hot. Utility Model Content

[0004] The main purpose of this utility model is to provide a cooking appliance that can reduce the generation of condensation on the inner pot sidewall during the heat preservation stage, while preventing the sidewall from becoming too hot.

[0005] To achieve the above objectives, the cooking utensil proposed in this utility model includes:

[0006] The main body has a mounting cavity with an opening at the top;

[0007] A heating assembly is disposed in the mounting cavity, defining the heating cavity. The heating assembly includes a heating plate and a first heat-conducting part. The heating plate includes a second heat-conducting part disposed at the bottom of the mounting cavity and a heating part for heating the second heat-conducting part. The lower end of the first heat-conducting part is connected to the upper end of the second heat-conducting part.

[0008] The inner pot is located at the bottom of the heating chamber and is heated by the heating assembly;

[0009] The first heat-conducting part and the second heat-conducting part are in a heat exchange relationship, and the thermal conductivity of the first heat-conducting part is set to be less than that of the second heat-conducting part.

[0010] In one embodiment, the thermal conductivity of the first heat-conducting part is set to be less than 100 W / mK, and the thermal conductivity of the second heat-conducting part is set to be greater than or equal to 100 W / mK; and / or,

[0011] The first heat-conducting part is made of galvanized steel plate or aluminized steel plate, and the second heat-conducting part is made of aluminum plate, aluminum alloy plate or aluminum composite plate.

[0012] In one embodiment, the thermal conductivity of the first heat-conducting part is set to be greater than or equal to 30 W / mK and less than or equal to 80 W / mK.

[0013] In one embodiment, the main body includes a housing and a mounting portion connected within the housing, wherein the first heat-conducting portion is mounted on the mounting portion;

[0014] The outer casing is made of metal, and the mounting part is made of plastic or rubber.

[0015] In one embodiment, one of the mounting part and the first heat-conducting part is provided with a retaining part, and the other is provided with a mating part that engages with the retaining part.

[0016] In one embodiment, the first heat-conducting part is arranged in a ring shape and connected to the upper edge of the second heat-conducting part, so as to form the heating cavity with the opening facing upward.

[0017] In one embodiment, the first heat-conducting part includes a first annular body and a first flange disposed at the lower periphery of the first annular body;

[0018] The second heat-conducting part includes a heat-conducting body and a second flange disposed on the outer periphery of the heat-conducting body;

[0019] The first flange and the second flange are positioned opposite each other and are attached to each other.

[0020] In one embodiment, one of the first flange and the second flange is bent to form a slot, and the other flange extends into the slot to engage with the slot.

[0021] In one embodiment, the first flange and the second flange are respectively provided with connecting holes arranged opposite to each other, and the first flange and the second flange are connected by a connector passing through the two connecting holes.

[0022] In one embodiment, the heating plate further includes a bottom cover disposed on the lower side of the second heat-conducting part, and the heating part is located between the second heat-conducting part and the bottom cover;

[0023] The surface area of ​​the bottom cover facing the second heat-conducting part is S1, and the surface area of ​​the heating plate facing the inner pot is S2, where S1 ≤ 2 / 3 × S2.

[0024] In one embodiment, the inner diameter of the first heat-conducting part is D1;

[0025] The heating plate protrudes gradually from the center outwards towards the side away from the bottom of the heating cavity. The maximum inner diameter of the heating plate is D2, where D2 ≥ 0.9 × D1.

[0026] In one embodiment, the distance between the outer periphery of the heating plate and the bottom of the second heat-conducting part in the thickness direction of the heating plate is H1, and the distance between the outer periphery of the inner pot and the bottom of the inner pot in the thickness direction of the heating plate is H2, where 20mm≤H1≤2 / 3H2.

[0027] In one embodiment, the minimum gap between the first heat-conducting part and the inner pot is H3, where 0.5mm ≤ H3 ≤ 8mm; and / or,

[0028] The height of the first heat-conducting part is H4, and the distance between the outer periphery of the inner pot and the bottom of the inner pot in the thickness direction of the heating plate is H2, where 1 / 4H2≤H4≤3 / 4H2.

[0029] In one embodiment, the cooking appliance further includes a heat insulation portion disposed on the side of the heating plate facing the bottom of the main body.

[0030] In this invention, by setting the thermal conductivity of the first heat-conducting part to be lower than that of the second heat-conducting part, heat from the second heat-conducting part can be effectively transferred to the first heat-conducting part, maintaining a suitable temperature for the inner pot's sidewall and reducing condensation caused by temperature differences. Simultaneously, the lower thermal conductivity of the first heat-conducting part ensures that the amount of heat transferred from the second heat-conducting part to the first heat-conducting part during heat conduction is relatively limited, preventing excessive heat transfer to the first heat-conducting part and thus avoiding excessively high temperatures on the inner pot's sidewall. This provides a cooking utensil that reduces condensation on the inner pot's sidewall during the heat preservation stage while preventing the sidewall from becoming excessively hot. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of an embodiment of a rice cooker in the prior art;

[0033] Figure 2 A cross-sectional schematic diagram of an embodiment of the cooking utensil provided by this utility model;

[0034] Figures 3 to 5 for Figure 2 A schematic diagram of the heating component in the diagram;

[0035] Figure 6 for Figure 5 A cross-sectional schematic diagram;

[0036] Figure 7 for Figure 6 A partially enlarged view of an embodiment at point A in the middle;

[0037] Figure 8 for Figure 6 A partially enlarged view of another embodiment at point A;

[0038] Figure 9 for Figure 6 A partial enlarged view of another embodiment at point A in the middle;

[0039] Figure 10 for Figure 6 A partial enlarged view of an embodiment at point B;

[0040] Figure 11 for Figure 5 A schematic diagram of the structure of one embodiment of the heating element.

[0041] Explanation of icon numbers:

[0042] 100' Rice cooker; 10' Bottom heating plate; 20' Side wall heating element;

[0043] 100. Cooking appliance; 1. Main body; 11. Outer shell; 12. Mounting part; 2. Heating component; a. Heating cavity; 21. Heating plate; 211. Second heat-conducting part; 2111. Heat-conducting main body; 2112. Second flange; 212. Heating part; 2121. Heating wire; 2122. Insulating part; 22. First heat-conducting part; 221. First annular main body; 222. First flange; 213. Bottom cover; 3. Inner pot; 41. Holding part; 42. Fitting part; b. Slot; c. Connecting hole; 5. Connecting part; 6. Heat insulation part.

[0044] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0046] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0047] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0048] During the heat preservation stage, excessively low temperatures on the inner pot's sidewalls can cause condensation, leading to the rice absorbing moisture, turning white, and even spoiling over time. To achieve more even heating, existing technologies... (See also...) Figure 1 The rice cooker 100' design incorporates a side wall heating element 20'. However, the bottom heating plate 10' and the side wall heating element 20' usually work separately and independently. This means that an additional control system is needed to manage the heating process of different parts, which makes the design of components such as the power board more complex and increases costs. At the same time, the side wall heating element gets too hot, causing the rice cooker's shell side wall to become too hot.

[0049] This utility model proposes a cooking appliance 100, which aims to provide a cooking appliance 100 that can reduce the generation of condensation on the inner pot 3 side walls during the heat preservation stage, while preventing the side walls from becoming too hot.

[0050] Please see Figures 2 to 5In one embodiment of this utility model, the cooking appliance 100 includes a main body 1, a heating component 2, and an inner pot 3. The main body 1 has an installation cavity with an opening at the upper end. The heating component 2 is disposed in the installation cavity and defines a heating cavity a. The heating component 2 includes a heating plate 21 and a first heat-conducting part 22. The heating plate 21 includes a second heat-conducting part 211 disposed at the bottom of the installation cavity and a heating part 212 for heating the second heat-conducting part 211. The lower end of the first heat-conducting part 22 is connected to the upper end of the second heat-conducting part 211. The inner pot 3 is disposed at the bottom of the heating cavity a and is heated by the heating component 2. The first heat-conducting part 22 and the second heat-conducting part 211 are in a heat exchange relationship, and the thermal conductivity of the first heat-conducting part 22 is set to be less than the thermal conductivity of the second heat-conducting part 211.

[0051] The main body 1 is the main structure of the cooking appliance 100, including the outer shell 11 and an electronic control device disposed on the outer shell 11. The main body 1 has a mounting cavity with an opening at the upper end for accommodating the heating component 2 and ensuring that the inner pot 3 can be stably placed in the correct position.

[0052] The heating assembly 2 is disposed inside the mounting cavity. The heating assembly 2 includes the heating plate 21 and the first heat-conducting part 22. The heating plate 21 specifically includes the second heat-conducting part 211 and the heating part 212. The second heat-conducting part 211 is located at the bottom of the mounting cavity and is connected to the heating part 212, which conducts heat to the second heat-conducting part 211. The lower end of the first heat-conducting part 22 is connected to the upper end of the second heat-conducting part 211, and the two together define an upward-facing heating cavity a. This not only heats the bottom of the pot, but also provides auxiliary heating to the side wall of the inner pot 3 through the first heat-conducting part 22, thereby achieving a more uniform temperature distribution.

[0053] It should be noted that the heating plate 21 can be a wire heating plate or an integrally formed cast aluminum plate. The second heat-conducting part 211 is configured as at least the portion of the heating plate in contact with the inner pot 3 (the plate surface in contact with the inner pot 3). It can be understood that if the heating plate 21 is a cast aluminum plate, the heating part that provides the heat source is a heating tube embedded in it, and the second heat-conducting part 211 is the cast aluminum layer wrapped around the heating tube.

[0054] It should also be noted that the first heat-conducting part 22 can be a single component, or it can be formed by combining multiple components, or multiple components spaced apart. The specific configuration can be determined according to the actual situation, and this specification does not limit this aspect.

[0055] The first heat-conducting part 22 and the second heat-conducting part 211 are in a heat exchange relationship, so that during the heat preservation stage, the heat in the second heat-conducting part 211 can be effectively transferred to the first heat-conducting part 22, thereby gently heating the side wall of the inner pot 3.

[0056] Given that the first heat-conducting part 22 has a lower thermal conductivity than the second heat-conducting part 211, the amount of heat transferred from the second heat-conducting part 211 to the first heat-conducting part 22 during heat conduction is relatively limited. Therefore, although some heat exchange occurs, excessive heat transfer to the first heat-conducting part 22 is prevented, thus avoiding excessively high temperatures on the side walls of the inner pot 3. Specifically, during the heat preservation process, the first heat-conducting part 22 gently heats the side walls of the inner pot 3, preventing the rice from absorbing too much moisture and becoming white or spoiled, while ensuring that the side walls do not become too hot due to excessive temperature, thereby improving cooking results and safety during use.

[0057] It should be noted that the second heat-conducting part 211 can be made of a material with high thermal conductivity to ensure efficient heat transfer and rapid heating process.

[0058] In the technical solution of this utility model, by setting the thermal conductivity of the first heat-conducting part 22 to be lower than that of the second heat-conducting part 211, the heat in the second heat-conducting part 211 can be effectively transferred to the first heat-conducting part 22, maintaining an appropriate temperature on the side wall of the inner pot 3, thereby reducing condensation caused by temperature difference. Simultaneously, the lower thermal conductivity of the first heat-conducting part 22 ensures that the heat transferred from the second heat-conducting part 211 to the first heat-conducting part 22 during heat conduction is relatively limited, preventing excessive heat transfer to the first heat-conducting part 22 and thus avoiding excessively high temperatures on the side wall of the inner pot 3. This provides a cooking utensil 100 that reduces condensation on the side wall of the inner pot 3 during the heat preservation stage while preventing the side wall from becoming excessively hot.

[0059] Specifically, in this embodiment, the thermal conductivity of the first heat-conducting part 22 is set to be less than 100 W / mK, and the thermal conductivity of the second heat-conducting part 211 is set to be greater than or equal to 100 W / mK; and / or, the first heat-conducting part 22 is made of galvanized steel plate or aluminized steel plate, and the second heat-conducting part 211 is made of aluminum plate, aluminum alloy plate or aluminum-containing composite plate.

[0060] The thermal conductivity of the first heat-conducting part 22 is set to be less than 100 W / mK. Preferably, the thermal conductivity of the first heat-conducting part 22 is set to be greater than or equal to 30 W / mK and less than or equal to 80 W / mK. The preferred material is galvanized steel or aluminized steel. Both of these materials have relatively low thermal conductivity, which can limit the rate of heat transfer from the second heat-conducting part 211 to the first heat-conducting part 22, reducing excessive heat transfer to the sidewalls during the heat preservation stage, preventing the sidewall temperature of the inner pot 3 from becoming too high, maintaining a moderate temperature of the sidewalls of the inner pot 3, and preventing safety hazards or problems such as rice absorbing too much water and turning white due to excessive sidewall temperature.

[0061] The thermal conductivity of the second heat-conducting part 211 is set to be greater than or equal to 100 W / mK, and it is preferably made of aluminum plate, aluminum alloy plate or aluminum composite plate. These materials have excellent thermal conductivity, which can quickly and efficiently conduct the heat generated by the heating part 212 away, ensuring that the heat is quickly and evenly distributed to the bottom area, ensuring that the bottom of the inner pot 3 is fully heated, thereby improving the overall heating efficiency and uniformity.

[0062] Specifically, please refer to Figure 2 In this embodiment, the main body 1 includes a housing 11 and a mounting part 12 connected to the housing 11, and the first heat-conducting part 22 is mounted on the mounting part 12; the housing 11 is made of metal, and the mounting part 12 is made of plastic or rubber.

[0063] The outer shell 11 is made of metal, such as stainless steel or aluminum alloy. The metal material not only makes the cooking appliance 100 sturdy and durable, but also provides good heat dissipation and contributes to its appearance and ease of cleaning.

[0064] The mounting part 12 is connected inside the housing 11 and is used to fix the first heat-conducting part 22. To achieve optimal heat insulation and reduce heat loss, the mounting part 12 is preferably made of a material with low thermal conductivity, such as plastic or rubber. This effectively isolates the heat generated by the heating component 2, preventing it from being directly conducted to the housing 11, thereby protecting the user from the risk of burns.

[0065] Further, please refer to Figure 2 and Figure 4 In this embodiment, one of the mounting part 12 and the first heat-conducting part 22 is provided with a retaining part 41, and the other is provided with a mating part 42 that engages with the retaining part 41.

[0066] The mounting part 12 is provided with either the retaining part 41 or the mating part 42, the specific configuration of which depends on the assembly requirements with the first heat-conducting part 22. The mounting part 12 can be securely mounted and assembled with the first heat-conducting part 22 by rotational fastening.

[0067] The first heat-conducting part 22 is also provided with a corresponding retaining part 41 or a mating part 42 to match the corresponding part on the mounting part 12. This not only simplifies the assembly process but also ensures a stable connection between the first heat-conducting part 22 and the mounting part 12 during use, reducing safety hazards caused by loosening.

[0068] With the engagement of the retaining part 41 and the mating part 42, the user can easily assemble the first heat-conducting part 22 with the mounting part 12 without additional tools or complicated steps. Furthermore, the rotational locking mechanism ensures that the first heat-conducting part 22 remains stable even after prolonged use, preventing loosening due to vibration or other external forces.

[0069] In one specific embodiment, the first heat-conducting part 22 is arranged in a ring shape and is connected to the upper edge of the second heat-conducting part 211 so as to form the heating cavity a with the opening facing upward.

[0070] Thus, the first heat-conducting part 22 is annular, forming a continuous heating surface, so that the heat transferred to the inner pot 3 is more uniform in its circumferential direction. The second heat-conducting part 211 is also annular, so as to connect with the upper edge of the second heat-conducting part 211. The second heat-conducting part 211 also forms a continuous and uniform heating surface, so that the side wall of the inner pot 3 is heated more uniformly.

[0071] Further, please refer to Figure 6 and Figure 7 In some embodiments, the first heat-conducting part 22 includes a first annular body 221 and a first flange 222 disposed at the lower periphery of the first annular body 221; the second heat-conducting part 211 includes a heat-conducting body 2111 and a second flange 2112 disposed at the outer periphery of the heat-conducting body 2111; the first flange 222 and the second flange 2112 are disposed opposite to each other and are attached to each other.

[0072] The first heat-conducting part 22 is composed of the first annular body 221 and the first flange 222 disposed at its lower periphery. The first annular body 221 is the main heat-conducting part, while the first flange 222 is used to increase the contact area with the second heat-conducting part 211, thereby improving the heat conduction efficiency.

[0073] The second heat-conducting part 211 includes the heat-conducting body 2111 and a second flange 2112 disposed on its outer periphery. The heat-conducting body 2111 is directly connected to the heating part 212, receiving heat from the heating part 212 and conducting it to the first heat-conducting part 22. Because the second flange 2112 is attached to the first flange 222, not only is the contact area between the two increased, but a stable connection structure is also formed, efficiently transferring heat to the first heat-conducting part 22 and reducing heat loss; in addition, by setting the flange, the actual contact area between the first heat-conducting part 22 and the second heat-conducting part 211 is increased, and more heat can be quickly and effectively transferred between the two components, thereby improving the heat conduction efficiency.

[0074] To achieve a more stable connection between the first heat-conducting part 22 and the second heat-conducting part 211 without requiring additional fixing structures, please refer to... Figure 8 In other embodiments, one of the first flange 222 and the second flange 2112 is bent to form a slot b, and the other extends into the slot b to engage with the slot b.

[0075] The slot b is formed by bending one of the first flange 222 and the second flange 2112 (e.g., the first flange 222), while the other flange (e.g., the second flange 2112) is designed to extend into the slot b to form a locking engagement.

[0076] It is understood that the first flange 222 can be processed into a U-shaped or L-shaped slot b with an opening facing downward or inward, so that the second flange 2112 can slide in smoothly and lock in place.

[0077] The second flange 2112 is precisely cut and shaped so that it can easily slide into the slot b of the first flange 222, ensuring a tight fit between the two parts.

[0078] Because of the locking mechanism in the slot b, a secure connection between the first heat-conducting part 22 and the second heat-conducting part 211 can be achieved without the need for screws or other fastening devices. This not only simplifies the manufacturing and assembly process but also reduces the cost increase caused by additional parts.

[0079] Of course, please see Figure 7 and Figure 9In some embodiments, an additional fixing structure can be provided between the first flange 222 and the second flange 2112. For example, the first flange 222 and the second flange 2112 are respectively provided with corresponding connecting holes c, and the first flange 222 and the second flange 2112 are connected by a connector 5 passing through the two connecting holes c. The connecting holes c can be threaded holes or through holes, and the connector 5 can be screws or bolts, etc. The close fit of the first flange 222 and the second flange 2112, coupled with the physical locking formed by the insertion of the slot b, greatly increases the actual contact area between the two, and the further fixing of the fixing structure can avoid performance degradation caused by loose connection.

[0080] Further, please refer to Figure 5 In this embodiment, the heating plate 21 further includes a bottom cover 213 disposed on the lower side of the second heat-conducting part 211, and the heating part 212 is located between the second heat-conducting part 211 and the bottom cover 213; the surface area of ​​the bottom cover 213 facing the second heat-conducting part 211 is S1, and the surface area of ​​the heating plate 21 facing the inner pot 3 is S2, S1≤2 / 3×S2, preferably, S1≤1 / 2×S2.

[0081] The surface area of ​​the bottom cover 213 facing the second heat-conducting part 211 is equal to the area of ​​its upper surface. The surface area of ​​the heating plate 21 facing the inner pot 3 is equal to the area of ​​the second heat-conducting part 211 and the upper surface of the bottom cover 213. Constraining S1 and S2 to S1 ≤ 2 / 3 × S2, meaning the maximum projected area S1 of the bottom cover 213 does not exceed 2 / 3 of the maximum projected area S2 of the heating plate 21, effectively reduces the overall volume of the bottom cover 213. A smaller volume of the bottom cover 213 indicates lower mass and heat capacity, thus reducing thermal inertia. This allows the heat generated by the heating part 212 to be conducted to the second heat-conducting part 211 more quickly and ultimately to the inner pot 3, improving heating response speed and shortening preheating time.

[0082] Furthermore, the bottom cover 213 not only reduces its volume and mass but also its surface area. Since the bottom cover 213 is in direct contact with the external environment, a larger surface area would result in more heat loss through radiation and convection. Therefore, by limiting the maximum projected area of ​​the bottom cover 213, its heat dissipation area can be effectively reduced, allowing more heat to remain inside the heating plate 21 instead of being dissipated by the bottom cover 213. The heating plate 21 can more efficiently transfer heat to the second heat-conducting part 211, ultimately heating the inner pot 3 and improving overall heating efficiency.

[0083] Please see Figure 10 and Figure 11 The heating element 212 includes a heating wire 2121 disposed between the second heat-conducting element 211 and the bottom cover 213, and at least one insulating member 2122. It is understood that, in one embodiment, the heating wire 2121 is wound around the insulating member 2122. The heating wire 2121 is wound in a spiral or loop form on the surface of the insulating member 2122 to ensure good contact between the heating wire 2121 and the insulator, thereby improving heat conduction efficiency. With this arrangement, the length and arrangement of the heating wire 2121 can be adjusted as needed, facilitating processing and installation.

[0084] In another embodiment, the heating wire 2121 is etched onto the insulating component 2122. The heating wire 2121 is not a standalone coil, but rather a conductive path is created on the insulator using chemical or physical etching techniques. This method offers high space utilization and is suitable for space-constrained applications. Etching the surface of the heating wire 2121 allows for more uniform heat distribution, reduces hot spots, and improves heating uniformity. Furthermore, the heating wire 2121 can be integrated with other electronic components or sensors, simplifying the overall design.

[0085] It is understood that the way the heating wire 2121 is mounted on the insulating component 2122 can be determined according to specific application requirements, design requirements, and manufacturing processes. In high-power and simple structure applications, a winding method can be used, while in applications requiring high integration and precise control, an etching method can be used.

[0086] In this embodiment, the insulating member 2122 can be used as a support member for the heating wire 2121 or as a barrier to prevent leakage. Of course, when multiple insulating members 2122 are provided, one of the insulating members 2122 can be used as a support member for the heating wire 2121, and the other insulating members 2122 can be used as a barrier to prevent leakage.

[0087] The insulating component 2122 can be made of ceramic, high-temperature plastic, fiberglass, or mica. Preferably, the insulating component 2122 is made of mica sheets, such as natural mica sheets, white mica sheets, colored mica, vermiculite, large mica sheets, phlogopite sheets, and biotite sheets. Mica sheets maintain stable physical and chemical properties at high temperatures and can typically withstand temperatures up to 600°C or higher. As an insulating material, mica sheets have excellent electrical insulation properties, effectively preventing current flow and thus avoiding short circuits and other electrical faults. Furthermore, mica has relatively good thermal conductivity, which helps to evenly distribute heat from the heating wire 2121 and prevents localized overheating.

[0088] Further, please refer to Figure 6 In this embodiment, the inner diameter of the first heat-conducting part 22 is D1; ​​the heating plate 21 protrudes gradually from the center outwards towards the side away from the bottom of the heating cavity a, and the maximum inner diameter of the heating plate 21 is D2, where D2 ≥ 0.9 × D1, preferably D2 ≥ D1. The distance between the outer periphery of the heating plate 21 and the bottom of the second heat-conducting part 211 in the thickness direction of the heating plate 21 is H1, and the distance between the outer periphery of the inner pot 3 and the bottom of the inner pot 3 in the thickness direction of the heating plate 21 is H2, where 20mm ≤ H1 ≤ 2 / 3H2, preferably 30mm ≤ H1 ≤ 1 / 2H2.

[0089] By setting the maximum inner diameter D2 of the heating plate 21 to be greater than or equal to 0.9 times the inner diameter D1 of the first heat-conducting part 22, it can be ensured that the gap between the heating plate 21 and the first heat-conducting part 22 is as small as possible, or even seamlessly connected. This reduces the possibility of food residue or other debris falling into the gap, making it less likely for dirt to accumulate at the edges, thereby improving the ease of cleaning.

[0090] The distance H1 between the outer periphery of the heating plate 21 and the bottom of the second heat-conducting part 211 is controlled within a reasonable range (20mm≤H1≤2 / 3H2) to ensure that no hard-to-reach corners are formed on the upper edge of the heating plate 21, making it convenient for users to quickly clean with a cloth or other tools. In addition, since there are no obvious gaps, any residual food particles can be easily removed.

[0091] Maintaining an appropriate distance between the heating plate 21 and the inner pot 3 can not only prevent local overheating caused by close contact, but also effectively prevent food or other debris from falling into the heating plate 21 area, avoiding the risk of cleaning difficulties or damage to the heating element caused by debris falling.

[0092] Further, please refer to Figure 2 In this embodiment, the minimum gap between the first heat-conducting part 22 and the inner pot 3 is H3, where 0.5mm≤H3≤8mm, and preferably 1mm≤H3≤2mm.

[0093] A smaller gap (e.g., 0.5mm to 8mm) is created between the first heat-conducting part 22 and the inner pot 3 to increase the contact area between them, creating a so-called "overlapping surface." A larger overlapping surface not only improves direct heat conduction efficiency but also enhances radiative heat transfer. Radiative heat transfer is the process of transferring energy in the form of electromagnetic waves, and it is more effective at closer distances. Therefore, appropriately reducing the gap helps to improve this effect, resulting in a more uniform heat distribution.

[0094] By setting the minimum gap H3 between the first heat-conducting part 22 and the inner pot 3 to between 0.5 mm and 8 mm, the heat conduction path is shortened, allowing the first heat-conducting part 22 to more effectively transfer heat to the side wall of the inner pot 3. Experiments show that this setting can make the temperature of the side wall of the inner pot 3 at least 10°C higher than that of the conventional design, thereby improving the overall heating efficiency.

[0095] Further, please refer to Figure 2 and Figure 6 In this embodiment, the height of the first heat-conducting part 22 is H4, and the distance between the outer periphery of the inner pot 3 and the bottom of the inner pot 3 in the thickness direction of the heating plate 21 is H2, where 1 / 4H2≤H4≤3 / 4H2.

[0096] By setting the height H4 of the first heat-conducting part 22 between 1 / 4H2 and 3 / 4H2 to ensure sufficient contact area and appropriate radiation distance, the first heat-conducting part 22 can more effectively transfer heat to the side wall of the inner pot 3 in the form of radiation, which can significantly improve its radiative heat conduction efficiency to the side wall of the inner pot 3.

[0097] If H4 is set too small, heat may concentrate at the bottom of the inner pot 3, while the side walls may not be sufficiently heated; conversely, if H4 is too large, heat may be wasted, reducing overall heating efficiency. Therefore, by precisely controlling H4 between 1 / 4H2 and 3 / 4H2, it is possible to ensure that the side walls are sufficiently heated while avoiding unnecessary energy loss, thereby improving the uniformity of heating.

[0098] Setting the first heat-conducting part 22 to a relatively high position (but not exceeding 3 / 4 H2) increases the effective contact area with the side wall of the inner pot 3, enhancing the effects of direct heat conduction and radiative heat transfer. This not only improves heat transfer efficiency but also speeds up cooking and reduces user waiting time.

[0099] Furthermore, because the surface temperature of the heating plate 21 is high, without heat insulation measures, some heat will be lost to the bottom of the main body 1 through heat conduction and radiation, resulting in energy waste. For this reason, please refer to... Figure 2 In this embodiment, the cooking appliance 100 further includes a heat insulation part 6, which is disposed on the side of the heating plate 21 facing the bottom of the main body 1.

[0100] It should be noted that the heat insulation part 6 is usually made of galvanized sheet, aluminized sheet, or stainless steel sheet, which have certain heat insulation properties. When the heating plate 21 is working, the heat insulation part 6 can effectively isolate the heat exchange path between the heating plate 21 and the main body 1, reduce the conduction of heat to the outer shell 11 and the mounting part 12, thereby improving the overall heating efficiency.

[0101] By providing the heat insulation part 6 on the side of the heating plate 21 facing the bottom of the main body 1, the loss of this part of the heat can be effectively blocked, so that more heat can be concentrated and transferred to the inner pot 3.

[0102] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A cooking appliance characterized by, The application relates to a heating device, comprising: a main body part provided with an installation cavity with an open upper end; a heating assembly arranged in the installation cavity, the heating assembly defining a heating cavity, the heating assembly comprising a heating disc and a first heat-conducting part, the heating disc comprising a second heat-conducting part arranged at the bottom of the installation cavity and a heating part for heating the second heat-conducting part, and the lower end of the first heat-conducting part being connected to the upper end of the second heat-conducting part; and an inner pot arranged at the bottom of the heating cavity and heated by the heating assembly; wherein the first heat-conducting part and the second heat-conducting part are in heat exchange relationship, and the heat conduction coefficient of the first heat-conducting part is set to be smaller than the heat conduction coefficient of the second heat-conducting part. The heat conduction coefficient of the first heat-conducting part is set to be smaller than 100 W / mK, and the heat conduction coefficient of the second heat-conducting part is set to be greater than or equal to 100 W / mK; and / or the first heat-conducting part is made of a galvanized steel plate or an aluminum-plated steel plate, and the second heat-conducting part is made of an aluminum plate, an aluminum alloy plate or an aluminum-containing composite plate. The main body part comprises an outer shell and an installation part connected to the inner shell, and the first heat-conducting part is installed on the installation part. The material of the outer shell is metal, and the material of the installation part is plastic or rubber. One of the installation part and the first heat-conducting part is provided with a clamping part, and the other is provided with a matching part matched with the clamping part.

2. The cooking appliance of claim 1, wherein, The first heat-conducting part is annularly arranged and connected to the upper periphery of the second heat-conducting part to form the heating cavity with the second heat-conducting part. The first heat-conducting part comprises a first annular main body and a first flange arranged at the lower periphery of the first annular main body.

3. The cooking appliance of claim 1, wherein, The second heat-conducting part comprises a heat-conducting main body and a second flange arranged at the outer periphery of the heat-conducting main body. The first flange and the second flange are oppositely arranged, and the first flange and the second flange are abutted.

4. The cooking appliance of claim 3, wherein, One of the first flange and the second flange is bent to form a clamping groove, and the other is inserted into the clamping groove to be clamped with the clamping groove.

5. The cooking appliance of claim 1, wherein, The first flange and the second flange are oppositely arranged and correspondingly provided with connecting holes, and the first flange and the second flange are connected through a connecting piece penetrating the two connecting holes.

6. The cooking appliance of claim 5, wherein, The heating disc further comprises a bottom cover arranged at the lower side of the second heat-conducting part, and the heating part is located between the second heat-conducting part and the bottom cover. The surface area of the side of the bottom cover facing the second heat-conducting part is S1, the surface area of the side of the heating disc facing the inner pot is S2, and S1 is less than 2 / 3 of S2. The inner diameter of the first heat-conducting part is D1.

7. The cooking appliance of claim 6, wherein, The heating disc is gradually protruded from the middle part to the periphery and away from the side of the bottom of the heating cavity, the maximum inner diameter of the heating disc is D2, and D2 is greater than 0.9 times D1.

8. The cooking appliance of claim 6, wherein, The distance between the outer periphery of the heating disc and the bottom of the second heat-conducting part in the thickness direction of the heating disc is H1, the distance between the outer periphery of the inner pot and the bottom of the inner pot in the thickness direction of the heating disc is H2, and 20mm is less than 2 / 3 of H2.

9. The cooking appliance of claim 1, wherein, The minimum gap between the first heat-conducting part and the inner pot is H3, and 0.5mm is less than 8mm; and / or ​ 10. The cooking appliance of claim 1, wherein, ​ ​ 11. The cooking appliance of claim 1, wherein, ​ 12. The cooking appliance of claim 1, wherein, ​ A height H4 of the first heat conductive portion, a distance H2 in a thickness direction of the heating disc between an outer periphery of the inner pot and a bottom of the inner pot is H2, and 1 / 4H2≤H4≤3 / 4H2.

13. The cooking appliance of claim 1, wherein, The cooking appliance further comprises a heat insulation portion provided on a side of the heating disc facing the bottom of the main body portion.

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