Cooking utensil

Abstract

The utility model discloses a cooking utensil, and relates to the technical field of kitchen cooking equipment, the cooking utensil comprises a pot and a heating assembly, the pot is installed on an installation seat; the heating assembly is used for heating the bottom of the cookware and comprises an insulating mounting part and a plurality of heating wires arranged on the insulating mounting part; the maximum cross sectional area of the bottom of the cooker is S1, the maximum projection area of the area where the heating wires are distributed on the cross section of the cooker is S2, and S2 / S1 is larger than or equal to 1 / 5, so that it is guaranteed that the heating assembly can cover the sufficient area of the bottom of the cooker, and the heating efficiency is improved while the uniformity and effectiveness of the heating effect are guaranteed. The areas corresponding to the peripheries of the heating wires can generate power for driving food materials to roll over, the center of the bottom of the cooker is divided into a plurality of heated areas, the food materials in the center of the bottom of the cooker can be driven to roll over and be heated, and the problem that the water absorption and heating effects of rice in the center of the bottom of the cooker are poor than those of the periphery of the cooker is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen cooking equipment, in particular to a cooking utensil. Background Art

[0002] Existing hot plate rice cookers typically heat an aluminum plate above them using a heating element. The aluminum plate then transfers the heat to the bottom of the inner pot, heating the pot itself. Due to the small area of ​​the heating element, the heat distribution on the aluminum plate is uneven. The temperature is higher where the heating element is located, while the temperature is lower elsewhere, resulting in poorly even cooking.

[0003] There is a heating plate that is made by winding or etching many thin heating wires (chromium-nickel-iron alloy) on a mica insulating sheet, and evenly distributing the heating wires all over the mica insulating sheet. The heat generated by the heating plate during heating can be evenly distributed throughout the bottom of the pot, with high thermal uniformity. The food heating effect is better than that of a conventional heating tube-type heating plate. However, when cooking rice, the heating plate heats the entire bottom of the inner pot at the same time, and the heat flow in the cooking cavity is uniformly upward. In the absence of thermal convection, the rice grains lack the power to roll. Ultimately, the water absorption and heating effect of the rice in the center of the inner pot are worse than those in the periphery of the inner pot. Utility Model Content

[0004] The main purpose of the utility model is to provide a cooking utensil, which aims to solve the problem that the water absorption and heating effect of rice at the center of the bottom of the pot is worse than that of the surrounding area of ​​the pot.

[0005] To achieve the above-mentioned purpose, the cooking utensil proposed by the present invention includes:

[0006] Cookware; and

[0007] A heating assembly, for heating the bottom of the cookware, the heating assembly comprising an insulating mounting portion and a plurality of heating wires provided on the insulating mounting portion;

[0008] The maximum cross-sectional area of ​​the bottom of the cookware is S1, the maximum projected area of ​​the region where the multiple heating wires are distributed on the cross-sectional area of ​​the cookware is S2, and S2 / S1≥1 / 5.

[0009] In one embodiment, the cross section of the cookware is configured to be circular, and the projection of the area where the plurality of heating wires are distributed on the cross section of the cookware is configured to be circular.

[0010] In one embodiment, when 1 / 5≤S2 / S1≤1 / 2, the number of the plurality of heating wires is n=2; or,

[0011] When S2 / S1≥1 / 2, the number of the plurality of heating wires is n, and 2≤n≤8.

[0012] In one embodiment, the plurality of heating wires are arranged at intervals along the circumference of the insulating mounting portion; or,

[0013] The plurality of heating wires are arranged in sequence from the middle of the insulating mounting portion toward the outside.

[0014] In one embodiment, the plurality of heating wires are wound around the insulating mounting portion; or,

[0015] The plurality of heating wires are etched on the insulating mounting portion.

[0016] In one embodiment, the heating assembly further includes a bottom cover and a heat-conducting cover provided on a side of the bottom cover facing the cookware, and the insulating mounting portion and the plurality of heating wires are provided between the bottom cover and the heat-conducting cover.

[0017] In one embodiment, the heating assembly further comprises a first insulating sheet disposed between the bottom cover and the heat-conducting cover, wherein the first insulating sheet is located on a side of the plurality of heating wires facing the heat-conducting cover; and / or,

[0018] The heating assembly further includes a second insulating sheet disposed between the bottom cover and the heat-conducting cover, wherein the second insulating sheet is located on a side of the plurality of heating wires facing the bottom cover.

[0019] In one embodiment, at least one of the bottom cover and the heat-conducting cover is provided with a plurality of positioning protrusions, and correspondingly, a plurality of positioning holes are provided on the insulating mounting portion, each of the positioning holes is provided corresponding to a corresponding heating wire, and each of the positioning holes is provided for the corresponding positioning protrusion to pass through.

[0020] In one embodiment, the cooking appliance further comprises a temperature detection device;

[0021] A plurality of electrical terminals are provided on a side of the insulating mounting portion facing the bottom cover, and each of the electrical terminals is electrically connected to a corresponding heating wire;

[0022] The bottom cover is further provided with a connecting hole for the power terminal to pass through, so that the power terminal is connected to the temperature detection device.

[0023] In one embodiment, a through hole is formed in the middle of the heating component, and the temperature detection device is arranged corresponding to the through hole.

[0024] In one embodiment, the heating component is arranged to protrude gradually from the middle to the surrounding area toward the side where the cookware is located.

[0025] In one embodiment, a deformation groove is provided on the insulating mounting portion, and the deformation groove extends outward from a middle portion of the insulating mounting portion.

[0026] In one embodiment, the insulating mounting portion is arranged in a ring shape, and the multiple ends of the deformation groove are arranged to pass through the inner periphery or the outer periphery of the insulating mounting portion.

[0027] In one embodiment, a plurality of the deformation grooves are provided, and the plurality of deformation grooves are spaced apart in the circumferential direction of the insulating mounting portion.

[0028] In one embodiment, the deformation groove extends outward from the middle of the insulating mounting portion, and the plurality of heating wires are arranged at intervals along the circumference of the insulating mounting portion, with each heating wire being arranged in the area between two adjacent deformation grooves.

[0029] In one embodiment, the heating component further comprises a plurality of electrical terminals disposed on the insulating mounting portion, the plurality of electrical terminals being electrically connected to the plurality of heating wires, and each of the electrical terminals being disposed adjacent to the deformation groove.

[0030] In one embodiment, a connecting portion is provided on a side of the heating component facing away from the cookware, and a first connecting hole is provided on the connecting portion;

[0031] The cooking appliance further comprises a mounting base, which is provided with a second connecting hole. The heating assembly is fixedly connected to the mounting base via a connecting piece which passes through the first connecting hole and the second connecting hole.

[0032] In one embodiment, the cooking appliance includes an electric rice cooker or an electric pressure cooker.

[0033] In the technical solution of the present invention, the heating component includes an insulating mounting portion and a plurality of heating wires arranged on the insulating mounting portion, which are used to heat the bottom of the cookware. The maximum cross-sectional area of ​​the bottom of the cookware is S1, and the maximum projected area of ​​the area where the heating wires are distributed on the cross-sectional area of ​​the cookware is S2, and S2 / S1 ≥ 1 / 5. This ensures that the heating component can cover a sufficient area of ​​the bottom of the cookware to ensure the uniformity and effectiveness of the heating effect. At the same time, the areas corresponding to the periphery of each heating wire can generate power to drive the food to roll, dividing the center of the bottom of the cookware into multiple heating zones, so that the food at the center of the bottom of the cookware can also be driven to roll and be heated, thereby solving the problem that the rice at the center of the bottom of the cookware absorbs water and the heating effect is worse than that of the surrounding area of ​​the cookware. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0035] Figure 1 A cross-sectional schematic diagram of a first embodiment of the cooking utensil provided by the present invention;

[0036] Figure 2 for Figure 1 A cross-sectional view of the heating assembly;

[0037] Figure 3 for Figure 1 Explosion diagram of the heating component;

[0038] Figure 4 for Figure 1 A top view of the middle heat conducting cover;

[0039] Figure 5 for Figure 1 A bottom view of the midsole cover;

[0040] Figure 6 for Figure 1 Schematic diagram of the structure of the middle insulation installation part and the heating wire;

[0041] Figure 7 This is a structural schematic diagram of the first embodiment of the heating assembly provided by the utility model;

[0042] Figure 8 for Figure 1 A bottom view of the middle heat conducting cover;

[0043] Figure 9 This is a structural schematic diagram of a second embodiment of the heating assembly provided by the present utility model;

[0044] Figure 10 for Figure 9 A three-dimensional schematic diagram of a heating component;

[0045] Figure 11 This is a structural schematic diagram of the third embodiment of the heating component provided by the present utility model.

[0046] Description of Figure Numbers:

[0047] 100. Cooking utensil; 1. Mounting base; 2. Cookware; 3. Heating assembly; 31. Insulating mounting portion; 311. Power terminal; 32. Heating wire; 33. Bottom cover; 34. Thermal cover; 35. First insulating sheet; 36. Second insulating sheet; 37. Positioning protrusion; a. Positioning hole; b. Connecting hole; c. Through hole; d. Deformation groove; 4. Temperature detection device; 5. Connecting portion.

[0048] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0050] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0051] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include multiple such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0052] The present invention provides a cooking utensil 100, which aims to solve the problem that the rice at the center of the bottom of the cookware absorbs less water and is heated than the rice at the periphery of the cookware.

[0053] See also Figures 1 to 3In one embodiment of the present invention, the cooking utensil 100 includes a pot 2 and a heating assembly 3, wherein the heating assembly 3 is used to heat the bottom of the pot 2, and the heating assembly 3 includes an insulating mounting portion 31 and a plurality of heating wires 32 provided on the insulating mounting portion 31; wherein the maximum cross-sectional area of ​​the bottom of the pot 2 is S1, and the maximum projected area of ​​the region where the plurality of heating wires 32 are distributed on the cross-sectional area of ​​the pot 2 is S2, and S2 / S1 ≥ 1 / 5.

[0054] It should be noted that the pot 2 is a container for cooking, usually a part for placing ingredients. The shape of the pot 2 can be cylindrical, square-shaped, or of course, it can also be an irregular setting. Therefore, the cross-section of the pot 2 can be circular, square, or an irregular setting.

[0055] The heating component 3 is used to heat the pot 2. The pot 2 can be placed directly on the heating component 3 or supported by a mounting base and located above the heating component 3 to ensure that the pot 2 can be effectively heated.

[0056] It should be noted that, in this embodiment, the heating component 3 includes the insulating mounting portion 31 and a plurality of heating wires 32 provided on the insulating mounting portion 31. Since the heating wire 32 generates heat by electric current during operation, and the heating wire 32 needs to be supported by a supporting component to avoid contact with each other to form a short circuit of the current, causing the device to lose its normal heating function, the insulating mounting portion 31 ensures that no matter what form the heating wire 32 is installed on it, it can ensure that the multiple heating segments of the heating wire 32 will not be connected to each other by the insulating mounting portion 31.

[0057] The material of the insulating mounting portion 31 can generally be set to ceramic material, high-temperature plastic, glass fiber material or mica material. Preferably, the insulating mounting portion 31 is set to be a mica sheet, such as natural mica sheet, white mica sheet, colored mica, Lingshou vermiculite, large mica sheet, gold mica sheet, biotite sheet, etc. The mica sheet has good bending performance and excellent heat resistance, can maintain stable physical and chemical properties at high temperatures, and can usually withstand temperatures up to 600°C or higher. As an insulating material, mica sheet has excellent electrical insulation performance and can effectively prevent current from passing through, thereby avoiding short circuits and other electrical faults. In addition, the thermal conductivity of mica is relatively good, which can help to evenly distribute the heat of the heating wire 32 and avoid local overheating.

[0058] It can be understood that the heating wires 32 are evenly arranged on the surface of the insulating mounting portion 31 so that the area corresponding to the heating wires 32 is heated evenly.

[0059] The areas where the multiple heating wires 32 are arranged corresponding to the pot 2 can be heated evenly. When the multiple heating wires 32 are arranged corresponding to a portion of the bottom area of ​​the pot 2, that is, when the multiple heating wires 32 do not cover the entire bottom area of ​​the pot 2, when the water is heated, the movement of the water molecules with increased temperature accelerates and the density decreases, causing the hot water to float upward and the cold water at the bottom to move downward. This process is more obvious in the areas corresponding to the periphery of the multiple heating wires 32, because the temperature change of the water there is more significant, forming a clear convection pattern. And as the hot water rises and the cold water sinks, this flow will form a vortex, further enhancing the tumbling force of the water, thereby accelerating the transfer and mixing of heat.

[0060] Moreover, when a plurality of heating wires 32 are provided, the plurality of heating wires 32 are respectively provided corresponding to the plurality of areas at the bottom of the cookware 2 . During the operation of each heating wire 32 , a strong convection pattern will be formed in the boundary area of ​​the corresponding area at the bottom of the cookware 2 .

[0061] It should be noted that each heating wire 32 can be controlled to operate independently. When it is necessary to strengthen the heating of the pot 2 corresponding to the peripheral area of ​​one of the heating wires 32, the heating wire 32 can be controlled to operate. It should also be noted that when multiple heating wires 32 are provided, when the pot 2 is a small pot 2, only one or several of the multiple heating wires 32 can be turned on. In this way, the number and area of ​​the heating wires 32 can be selected according to the size of the pot 2 to adapt to the pot 2, thereby avoiding energy waste and reducing power loss.

[0062] The maximum cross-sectional area S1 of the bottom of the cookware 2 reflects the area of ​​contact between the bottom of the cookware 2 and the heating assembly 3. The maximum projected area S2 of the area where the heating wires 32 are distributed on the cross-section of the cookware 2 represents the effective heating area of ​​the heating assembly 3. When S2 / S1 ≥ 1 / 5, the projected area of ​​the area where the heating wires 32 are distributed must be at least one-fifth of the area of ​​the bottom of the cookware 2 to ensure that the heating assembly 3 covers a sufficient area of ​​the bottom of the cookware 2 for uniform and effective heating.

[0063] It should also be noted that when S2 / S1≥1, it means that the area where the multiple heating wires 32 are distributed can cover the entire area of ​​the bottom of the cookware 2. In order to achieve heat convection in the area near the middle of the cookware 2, at this time, each of the heating wires 32 is controlled to work or stop as needed, so that heat convection can be formed around the area corresponding to each heating wire 32.

[0064] When S2 / S1 is less than 1, a plurality of heating wires 32 can be provided, so that heat convection can be formed not only around the periphery of the area corresponding to each heating wire 32, but also the formation of heat convection in the area near the middle of the cookware 2 can be enhanced even if the plurality of heating wires 32 are turned on simultaneously.

[0065] In the technical solution of the present invention, the heating component 3 includes an insulating mounting portion 31 and a plurality of heating wires 32 provided on the insulating mounting portion 31, which are used to heat the bottom of the pot 2. The maximum cross-sectional area of ​​the bottom of the pot 2 is S1, and the maximum projected area of ​​the area where the plurality of heating wires 32 are distributed on the cross-sectional area of ​​the pot 2 is S2, where S2 / S1 ≥ 1 / 5, thereby ensuring that the heating component 3 can cover a sufficient area of ​​the bottom of the pot 2 and ensure the uniformity and effectiveness of the heating effect. At the same time, the areas corresponding to the periphery of each heating wire 32 can generate power to drive the food to roll, dividing the bottom center of the pot 2 into a plurality of heating zones, so that the food at the center of the bottom of the pot 2 can also be driven to roll and be heated, thereby solving the problem that the rice at the center of the bottom of the pot absorbs water and has a worse heating effect than that of the surrounding area of ​​the pot.

[0066] Specifically, see Figure 1 and Figure 3 In one embodiment, the cross section of the pot 2 is set to be circular, and the projection of the heating component 3 on the cross section of the pot 2 is set to be circular.

[0067] It should be noted that since heat radiates outward from the center, forming a more uniform temperature distribution, the circular design can ensure that heat is evenly distributed at the bottom of the pot 2, while the corners of the square or special-shaped pot 2 may receive less heat, which will cause uneven heating.

[0068] During the heating process, the convection and flow of the liquid are more likely to form a good circulation in the round pot 2. The shape of the round pot 2 makes the water flow more smoothly, reduces the flow resistance, promotes heat convection, and improves the heating efficiency.

[0069] It can be understood that the diameter of the maximum cross section of the bottom of the cookware 2 is D1, and the diameter of the maximum projection surface of the area where the heating wire 32 is distributed on the cross section of the cookware 2 is D2. At this time, when D2 / D1 is set to be greater than or equal to 1 / 5, it can be ensured that S2 / S1 ≥ 1 / 5.

[0070] Specifically, in some embodiments, when 1 / 5≤S2 / S1≤1 / 2, the number of the plurality of heating wires 32 is n=2.

[0071] It should be noted that when 1 / 5≤S2 / S1≤1 / 2, the area where the heating wire 32 is distributed and the overlapping area with the bottom of the cookware 2 is small, and the heat is more concentrated. Therefore, when partitioning is performed, too many partitions will lead to too many cold areas corresponding to the heating component 3, thereby reducing the heating efficiency of the heating component 3. Therefore, at this time, the heating wire 32 of the heating component 3 can independently control the number of heating areas n=2 to ensure the heating effect.

[0072] In other embodiments, when S2 / S1≥1 / 2, the number of the plurality of heating wires 32 is n, and 2≤n≤8.

[0073] It should be noted that when S2 / S1≥1 / 2, the area where the heating wire 32 is distributed and the overlapping area of ​​the bottom of the cookware 2 are sufficient, and the advantage of independent control of multiple zones can be brought into play at this time. Therefore, the heating wire 32 can independently control the number of heating zones to be greater than or equal to 2 and less than or equal to 8, thereby increasing the heat convection effect while ensuring the heating effect.

[0074] Furthermore, in order to reasonably plan the positions of the plurality of heating wires 32, please refer to Figures 7 to 10 In some embodiments, the plurality of heating wires 32 are arranged at intervals along the circumference of the insulating mounting portion 31 .

[0075] By arranging the multiple independently controlled heating wires 32 along the circumference of the insulating mounting portion 31, a variety of heating modes can be realized, such as pulse heating, gradual heating, etc., to meet different cooking needs. According to the different needs of the materials in the pot 2, specific areas can be heated in a targeted manner to avoid local overheating or insufficient heating. For example, when there are a large number of heating wires 32, one of each two adjacent heating wires 32 can be controlled to work while the other one works, which can also achieve more uniform heating of the bottom of the pot 2.

[0076] It should be noted that the circumferential direction of the insulating mounting portion 31 refers to the extension direction of the outer peripheral edge on the positive projection of the insulating mounting portion 31. When the insulating mounting portion 31 is set as a disc structure, the multiple heating wires 32 are arranged at intervals along the circumferential direction of the disc. When the insulating mounting portion 31 is set as a polygonal structure, the multiple heating wires 32 are arranged at intervals along the extension direction of each side length of the insulating mounting portion 31.

[0077] In the first embodiment, see Figure 7Two heating wires 32 are provided. These two heating wires 32 are symmetrically arranged side by side. This divides the center of the cookware 2 into two areas, allowing for strong heat convection in the center of the cookware 2. The two heating wires 32 are arranged as symmetrically as possible, improving the manufacturability of the heating assembly 3 and ensuring uniform heating.

[0078] In the second embodiment, see Figure 9 and Figure 10 , four heating wires 32 are provided. The four heating wires 32 can divide the central portion of the cookware 2 into four zones, thereby generating more intense heat convection in the central portion of the cookware 2. Of course, the four heating wires 32 are of uniform shape and size to improve the manufacturability and uniformity of the heating assembly 3.

[0079] In the third embodiment, see Figure 11 The plurality of heating wires 32 are arranged in sequence from the middle of the insulating mounting portion 31 in an outward direction. When there are two heating wires 32, one heating wire 32 is arranged in the inner circle and the other heating wire 32 is arranged in the outer circle.

[0080] It can be understood that the middle of the insulating mounting portion 31 refers to the position of the central area of ​​the interval occupied by the entire insulating mounting portion 31. For example, when the insulating mounting portion 31 is set to be ring-shaped, the middle of the insulating mounting portion 31 is the position of the insulating mounting portion 31 close to the center area of ​​the circle.

[0081] It should be noted that when the diameters of the pot 2 are different and increase successively, the area that the pot 2 can cover also increases successively from the middle to the outside. The multiple heating wires 32 are arranged successively from the middle of the insulating mounting portion 31 to the outside. The number of the heating wires 32 from the inside to the outside can be controlled according to the diameter of the pot 2, thereby changing the size of the heating area to adapt to pots 2 of different diameters, so that the bottom of the pot 2 is heated more evenly.

[0082] Specifically, see Figure 6 and Figure 7 In one embodiment, the heating wire 32 is wound around the insulating mounting portion 31. The heating wire 32 is wound around the surface of the insulating mounting portion 31 in a spiral or circular manner to ensure good contact between the heating wire 32 and the insulator, thereby improving heat conduction efficiency.

[0083] With such arrangement, the length and arrangement of the heating wire 32 can be adjusted as needed, which is convenient for processing and installation.

[0084] In another embodiment, the heating wire 32 is etched on the insulating mounting portion 31 .

[0085] The heating wire 32 is not a standalone coil. Instead, a conductive path is created on the insulator through chemical or physical etching techniques, resulting in high space utilization and suitable for space-constrained applications. Etching the surface of the heating wire 32 distributes heat more evenly, reducing hot spots and improving heating uniformity. Furthermore, the heating wire 32 can be integrated with other electronic components or sensors, simplifying the overall design.

[0086] It is understood that the manner in which the heating wire 32 is mounted on the insulating mounting portion 31 may vary depending on the specific application needs, design requirements, and manufacturing process. For high power and simple structure applications, a winding method may be employed, while for applications requiring high integration and precise control, an etching method may be employed.

[0087] Specifically, see Figure 3 In this embodiment, the heating component 3 further includes a bottom cover 33 and a heat-conducting cover 34 provided on the side of the bottom cover 33 facing the cookware 2 , and the insulating mounting portion 31 and the heating wire 32 are provided between the bottom cover 33 and the heat-conducting cover 34 .

[0088] The insulating mounting portion 31 and the heating wire 32 are disposed between the bottom cover 33 and the heat-conducting cover 34. The bottom cover 33 is mounted on the mounting base 1 and serves as the bottom portion of the heating assembly 3. It is understood that the bottom cover 33 has good mechanical strength and thermal conductivity, and plays a protective and supporting role.

[0089] The heat-conducting cover 34 is located on top of the bottom cover 33, facing the side of the cookware 2. The heat-conducting cover 34 effectively transfers heat from the heating wire 32 and the bottom cover 33 to the cookware 2, thereby heating it. The heat-conducting cover 34 is typically made of a material with good thermal conductivity to ensure rapid heat transfer.

[0090] With such an arrangement, the heat generated by the heating wire 32 can be more effectively transferred to the pot 2, thereby improving the heating efficiency and ensuring that the heat can be quickly and evenly distributed on the bottom of the pot 2, thereby improving the cooking effect.

[0091] See also Figure 3 In one embodiment, the heating component 3 further includes a first insulating sheet 35 disposed between the bottom cover 33 and the heat-conducting cover 34 , and the first insulating sheet 35 is located on a side of the plurality of heating wires 32 facing the heat-conducting cover 34 .

[0092] It is understandable that when the heat-conducting cover 34 is set to a metal conductive material and the bottom cover 33 is set to a non-metallic non-conductive material, when the heating wire 32 contacts the heat-conducting cover 34, the current will be transferred to the heat-conducting cover 34, causing leakage and posing a safety hazard.

[0093] The first insulating sheet 35 is provided on the side of the plurality of heating wires 32 facing the heat-conducting cover 34 . The first insulating sheet 35 provides electrical insulation to ensure that the current of the heating wires 32 is not conducted to the pot 2 or other electrical components through the heat-conducting cover 34 , thereby preventing the risk of short circuit and electric shock.

[0094] It should be noted that although the first insulating sheet 35 is located between the multiple heating wires 32 and the thermally conductive cover 34, its material and structural design will affect the heat transfer. Selecting a suitable insulating material can control the heat transfer rate to a certain extent, ensuring that the heat is effectively concentrated on the thermally conductive cover 34, thereby improving the heating efficiency. In this embodiment, the first insulating sheet 35 can be set as a mica sheet. Mica sheets have excellent electrical insulation properties, excellent heat resistance, and can maintain stable physical and chemical properties at high temperatures, making them suitable for this usage scenario.

[0095] Please continue reading Figure 3 In another embodiment, the heating component 3 further includes a second insulating sheet 36 disposed between the bottom cover 33 and the heat-conducting cover 34 , and the second insulating sheet 36 is located on the side of the plurality of heating wires 32 facing the bottom cover 33 .

[0096] It is understandable that when the heat-conducting cover 34 is set to a non-metallic non-conductive material and the bottom cover 33 is set to a metallic conductive material, when the heating wire 32 contacts the bottom cover 33, the current will be transferred to the bottom cover 33, which will also cause leakage and pose a safety hazard.

[0097] Similarly, the second insulating sheet 36 is mainly used to provide electrical insulation to ensure that the heating wire 32 does not directly contact the bottom cover 33, thereby avoiding potential short circuit and current leakage risks. The second insulating sheet 36 can be set as a mica sheet, similar to the above.

[0098] Please continue reading Figure 3 In another embodiment, the heating component 3 further includes a first insulating sheet 35 and a second insulating sheet 36 arranged between the bottom cover 33 and the heat-conducting cover 34, the first insulating sheet 35 is located on the side of the multiple heating wires 32 facing the heat-conducting cover 34, and the second insulating sheet 36 is located on the side of the multiple heating wires 32 facing the bottom cover 33.

[0099] It is understandable that when the heat-conducting cover 34 is made of a metal conductive material and the bottom cover 33 is also made of a metal conductive material, when the heating wire 32 contacts the heat-conducting cover 34 or the bottom cover 33, current will be transferred to the bottom cover 33, causing leakage and posing a great safety hazard.

[0100] The first insulating sheet 35 is disposed between the bottom cover 33 and the heat-conducting cover 34, on the side of the heating wire 32 facing the heat-conducting cover 34. This prevents direct contact between the heating wire 32 and the heat-conducting cover 34, thereby reducing the risk of current leakage and short circuits. The second insulating sheet 36 is also disposed between the bottom cover 33 and the heat-conducting cover 34, but on the side of the heating wire 32 facing the bottom cover 33. Its function is similar to that of the first insulating sheet 35, also providing electrical insulation, ensuring no direct contact between the heating wire 32 and the bottom cover 33, further improving safety.

[0101] In the heating assembly 3, the first insulating sheet 35 and the second insulating sheet 36 together form a sandwich, which is located on both sides of the heating wire 32. This arrangement provides double insulation protection, effectively electrically isolating the heating wire 32 and reducing electrical safety hazards.

[0102] Further, see Figure 7 and Figure 8 In this embodiment, at least one of the bottom cover 33 and the heat-conducting cover 34 is provided with a plurality of positioning protrusions 37. Correspondingly, a plurality of positioning holes a are provided on the insulating mounting portion 31. Each positioning hole a is provided corresponding to a corresponding heating wire 32, and each positioning hole a is provided for the corresponding positioning protrusion 37 to pass through.

[0103] By providing the positioning protrusion 37 and the positioning hole a in cooperation, on the one hand, when the insulating mounting portion 31 is installed on the bottom cover 33 or the thermal conductive cover 34, while aligning and fixing the insulating mounting portion 31, the heating wire 32 can be ensured to be in the correct position inside the component, thereby ensuring the stability of the heating effect and effectively preventing the heating wire 32 from moving or displacing during use.

[0104] On the other hand, multiple positioning protrusions 37 and positioning holes a are provided. The shapes and sizes of the multiple positioning protrusions 37 can be set to be different. Correspondingly, the shape and size of the positioning holes a need to match the positioning protrusions 37. A positioning hole a is provided near each heating wire 32 to ensure that each heating wire 32 is installed in the correct area. When the insulating mounting portion 31 is installed on the bottom cover 33 or the thermally conductive cover 34, if the installation angle is incorrect, the positioning protrusion 37 cannot pass through the positioning hole a, thereby achieving the purpose of foolproof design.

[0105] Further, see Figure 1 and Figure 3 In this embodiment, the cooking appliance 100 further includes a temperature detection device 4; a power terminal 311 is provided on the side of the insulating mounting portion 31 facing the bottom cover 33, and the power terminal 311 is electrically connected to the plurality of heating wires 32; a connecting hole b is also provided on the bottom cover 33 for the power terminal 311 to pass through, so that the power terminal 311 is connected to the temperature detection device 4.

[0106] In order to facilitate the power connection of the heating wire 32, the power terminal 311 is set at the bottom of the insulating mounting portion 31, and the multiple heating wires 32 and the temperature detection device 4 are electrically connected through the power terminal 311, and the external power supply is connected through the temperature detection device 4.

[0107] It is understandable that when the first insulating sheet 35 and the second insulating sheet 36 are provided, correspondingly, a via is also provided on the second insulating sheet 36 , so that the power terminal 311 can pass through the via and the connection hole to connect to the temperature detection device 4 .

[0108] Furthermore, in order to more accurately measure the temperature of the pot 2, please refer to Figures 4 to 11 In this embodiment, a through hole c is provided in the middle of the heating component 3, and the temperature detection device 4 is arranged corresponding to the through hole c. The temperature detection device can be extended to the top through the through hole c, so that the temperature detection device is arranged as close to the pot 2 as possible to detect the temperature of the pot 2 in real time.

[0109] Furthermore, in order to help evenly distribute heat at the bottom of the pot 2 and avoid local overheating or overcooling, the bottom of the pot 2 can be set to a curved surface. In order to transfer the heat generated by the heating component 3 to the pot 2 as much as possible, in another embodiment, the heating component 3 is set to protrude gradually from the middle to the surrounding area toward the side where the pot 2 is located.

[0110] Thus, the concave structure of the heating element 3 allows it to fit snugly against the bottom of the pot 2, creating a larger contact surface and facilitating better heat conduction, thereby improving heating efficiency. Furthermore, the concave and convex surfaces fit snugly together, enhancing structural stability and reducing heat loss, ultimately improving cooking quality and safety.

[0111] See also Figures 9 to 11 In this embodiment, a deformation groove d is provided on the insulating mounting portion 31 .

[0112] It should be noted that, since the insulating mounting portion 31 is sandwiched between the bottom cover 33 and the thermally conductive cover 34, when the bottom cover 33 and the thermally conductive cover 34 are configured as arc surfaces, the insulating mounting portion 31 will also deform and adaptively extend in an arc surface. The insulating mounting portion 31 is generally configured as a flat sheet. For example, when it is configured as a mica sheet, during the deformation process, the outer periphery of the mica sheet needs to be extended, and is therefore prone to cracking.

[0113] The deformation groove d is provided on the insulating mounting portion 31. When the insulating mounting portion 31 is clamped between the bottom cover 33 and the thermal conductive cover 34, the deformation groove d is deformed in the area where extension is required, thereby providing deformation extension space for the insulating mounting portion 31, effectively dispersing stress, reducing local stress concentration during the assembly process, and thus reducing the risk of cracking.

[0114] Further, see Figure 9 In one embodiment, the insulating mounting portion 31 is arranged in a ring shape, the middle portion of the insulating mounting portion 31 is used for installing the temperature detection device, and multiple ends of the deformation groove d are arranged through the inner periphery or outer periphery of the insulating mounting portion 31.

[0115] Because the multiple ends of the deformation grooves d extend through the inner or outer periphery of the insulating mounting portion 31, this effectively creates shear cuts on the inner or outer periphery of the insulating mounting portion 31. The shape changes of the inner and outer peripheries result in a larger bending radius, thereby reducing localized stress on the material. Providing cuts at the edges of the annular structure improves the material's ductility, allowing it to deform better under external forces without causing brittle fracture. This configuration provides the deformation grooves d with an additional degree of freedom during the deformation of the mica sheet, thereby reducing internal stress and increasing ductility, thereby enhancing the insulating mounting portion 31's ability to adapt to mechanical stress during assembly.

[0116] Please continue to refer to the drawings. In this embodiment, a plurality of deformation grooves d are provided. The plurality of deformation grooves d are spaced apart in the circumferential direction of the insulating mounting portion 31 .

[0117] The plurality of deformation grooves d are evenly distributed along the peripheral direction of the annular structure, and the grooves can work together to evenly share the external force.

[0118] It should be noted that the spacing distance between the multiple deformation grooves d needs to be set reasonably. Reasonable spacing can avoid mutual influence between the grooves, ensure that each groove can function independently, and maintain the structural strength and integrity of the material.

[0119] In this way, a plurality of deformation grooves d are arranged at intervals in the circumferential direction of the insulating mounting portion 31 , so that the symmetry and uniformity of the entire annular insulating mounting portion 31 can be maintained.

[0120] Furthermore, in this embodiment, the deformation groove d extends outward from the middle of the insulating mounting portion 31, and the multiple heating wires 32 are arranged at intervals along the circumference of the insulating mounting portion 31, and each heating wire 32 is arranged in the area between two adjacent deformation grooves d.

[0121] In this way, when the heating wire 32 is wound on the insulating mounting portion 31, the portion around the edge of each deformation groove d can form a junction for the heating wire 32 to transition from one side to the other side. Each deformation groove d not only provides a clearance space for the insulating mounting portion 31, but also facilitates the winding process of the multiple heating wires 32.

[0122] It can be understood that when the deformation groove d is deformed, each heating wire 32 is not affected by the deformation of the insulating mounting portion 31 , thereby ensuring the normal operation of each heating wire 32 .

[0123] Furthermore, in this embodiment, the heating component 3 further includes a plurality of electrical terminals 311 disposed on the insulating mounting portion 31 , the plurality of electrical terminals 311 being electrically connected to the plurality of heating wires 32 , and each of the electrical terminals 311 being disposed adjacent to the deformation groove d.

[0124] In this arrangement, the head end and the tail end of each heating wire 32 are arranged adjacent to the deformation groove d, each heating wire 32 covers the corresponding area on the insulating mounting portion 31 as much as possible, and each power terminal is arranged close to the deformation groove. The consistency of the multiple power terminals 311 is good, which facilitates the layout of the power lines electrically connected to the multiple power terminals 311.

[0125] Further, see Figure 1 and Figure 5 In this embodiment, a connecting portion 5 is provided on the side of the heating component 3 facing away from the pot 2, and a first connecting hole is provided on the connecting portion 5; the cooking utensil 100 also includes a mounting base 1, and a second connecting hole is provided on the mounting base 1. The heating component 3 is fixedly connected to the mounting base 1 through a connecting piece passing through the first connecting hole and the second connecting hole.

[0126] It should be noted that the mounting seat 1 is a seat for installing the pot 2 and the heating component 3, which plays the role of supporting and fixing the pot 2 and the heating component 3. For example, when the cooking utensil 100 is an electric rice cooker, the mounting seat 1 can be regarded as the shell structure of the electric rice cooker, the heating component 3 is installed at the bottom of the shell, and the pot 2 can be placed in the shell; when the cooking utensil 100 is an electric stew cup, the mounting seat 1 can be regarded as the base of the electric stew cup, the pot 2 is fixed above the base, the heating component 3 is installed in the base, and the pot 2 is installed on the mounting seat 1.

[0127] It is understood that the connecting portion 5 is used to connect or secure the heating assembly 3 to the mounting base 1. The first and second connecting holes enable the heating assembly 3 to be connected to the mounting base 1 via the connecting member. The connecting member may be a bolt, screw, latch, etc. The connecting member is inserted through the two connecting holes to prevent the heating assembly 3 from shifting or falling off during use, thereby improving the safety of the device.

[0128] Specifically, in this embodiment, the cooking utensil 100 comprises an electric rice cooker or an electric pressure cooker. Thus, when the electric rice cooker or the electric pressure cooker is in operation, the area corresponding to the periphery of the heating assembly 3 can generate sufficient heat convection force in the central area of ​​the pot 2, thereby allowing the food or ingredients to roll as much as possible, thereby improving the water absorption and heating effect of the food in the center of the pot 2.

[0129] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A cooking utensil, characterized in that: include: Cookware; as well as, A heating assembly, for heating the bottom of the cookware, the heating assembly comprising an insulating mounting portion and a plurality of heating wires provided on the insulating mounting portion; The maximum cross-sectional area of ​​the bottom of the cookware is S1, the maximum projected area of ​​the region where the multiple heating wires are distributed on the cross-sectional area of ​​the cookware is S2, and S2 / S1≥1 / 5.

2. The cooking appliance according to claim 1, wherein The cross section of the cookware is set to be circular, and the projection of the area where the multiple heating wires are distributed on the cross section of the cookware is set to be circular.

3. The cooking appliance according to claim 1, wherein When 1 / 5≤S2 / S1≤1 / 2, the number of the plurality of heating wires is n=2; or, When S2 / S1≥1 / 2, the number of the plurality of heating wires is n, and 2≤n≤8.

4. The cooking appliance according to claim 3, wherein The plurality of heating wires are arranged at intervals along the circumference of the insulating mounting portion; or, The plurality of heating wires are arranged in sequence from the middle of the insulating mounting portion toward the outside.

5. The cooking appliance according to claim 1, wherein The plurality of heating wires are wound around the insulating mounting portion; or, The plurality of heating wires are etched on the insulating mounting portion.

6. The cooking appliance according to claim 1, wherein The heating assembly further includes a bottom cover and a heat-conducting cover arranged on a side of the bottom cover facing the cookware, and the insulating mounting portion and the plurality of heating wires are arranged between the bottom cover and the heat-conducting cover.

7. The cooking appliance according to claim 6, wherein The heating assembly further includes a first insulating sheet disposed between the bottom cover and the heat-conducting cover, the first insulating sheet being located on a side of the plurality of heating wires facing the heat-conducting cover; and / or, The heating assembly further includes a second insulating sheet disposed between the bottom cover and the heat-conducting cover, wherein the second insulating sheet is located on a side of the plurality of heating wires facing the bottom cover.

8. The cooking appliance according to claim 6, wherein At least one of the bottom cover and the heat-conducting cover is provided with a plurality of positioning protrusions. Correspondingly, a plurality of positioning holes are provided on the insulating mounting portion. Each positioning hole is provided corresponding to a corresponding heating wire, and each positioning hole is provided for the corresponding positioning protrusion to pass through.

9. The cooking appliance according to claim 6, wherein The cooking appliance further comprises a temperature detection device; A plurality of electrical terminals are provided on a side of the insulating mounting portion facing the bottom cover, and each of the electrical terminals is electrically connected to a corresponding heating wire; The bottom cover is further provided with a connecting hole for the power terminal to pass through, so that the power terminal is connected to the temperature detection device.

10. The cooking appliance according to claim 9, wherein A through hole is formed in the middle of the heating component, and the temperature detection device is arranged corresponding to the through hole.

11. The cooking appliance according to any one of claims 1 to 10, characterized in that: The heating component is arranged to protrude gradually from the middle to the surrounding area toward the side where the cookware is located.

12. The cooking appliance according to claim 1, wherein The insulating mounting portion is provided with a deformation groove.

13. The cooking appliance according to claim 12, wherein The insulating mounting portion is arranged in an annular shape, and at least one end of the deformation groove is arranged to pass through the inner periphery or the outer periphery of the insulating mounting portion.

14. The cooking appliance according to claim 12, wherein A plurality of deformation grooves are provided, and the plurality of deformation grooves are spaced apart in the circumferential direction of the insulating mounting portion.

15. The cooking appliance according to claim 14, wherein The deformation groove extends outward from the middle of the insulating mounting portion, and the plurality of heating wires are arranged at intervals along the circumference of the insulating mounting portion, with each heating wire being arranged in a region between two adjacent deformation grooves.

16. The cooking appliance according to claim 15, wherein The heating component further includes a plurality of electrical terminals arranged on the insulating mounting portion, the plurality of electrical terminals being electrically connected to the plurality of heating wires, and each of the electrical terminals being arranged adjacent to the deformation groove.

17. The cooking appliance according to claim 1, wherein A connecting portion is provided on a side of the heating component facing away from the cookware, and a first connecting hole is provided on the connecting portion; The cooking appliance further comprises a mounting base, which is provided with a second connecting hole. The heating assembly is fixedly connected to the mounting base via a connecting piece which passes through the first connecting hole and the second connecting hole.

18. The cooking appliance according to claim 1, wherein The cooking appliance includes an electric rice cooker or an electric pressure cooker.

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