Cooking utensil
By using zoned electric heating and electromagnetic heating devices, the problem of insufficient heating of non-metallic cookware and pot walls by electromagnetic heating appliances is solved, achieving efficient heating of any cookware and full stimulation of the flavor and nutrition of food, while reducing energy consumption and costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-18
- Publication Date
- 2026-03-31
AI Technical Summary
Electromagnetic heating appliances can only heat cookware made of certain metal materials and cannot heat cookware made of non-metal materials. Furthermore, the heating effect on the pot walls is limited, resulting in the inability to fully bring out the flavor and nutrients of the food.
The device employs a zoned electric heating unit and an electromagnetic heating unit, including a first heating unit and a second heating unit. The second heating unit protrudes upward to heat the pot wall. Combined with an infrared heating unit and a heat insulation ring, the heating unit and coil assembly are independently controlled to improve heating efficiency and safety.
It achieves effective heating of any cookware, especially full heating of the pot wall, which enhances the flavor and nutritional value of the ingredients while reducing energy consumption and cost.
Smart Images
Figure CN224068820U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cooking utensils technology, and in particular to a cooking utensil. Background Technology
[0002] Electromagnetic heating has a technical limitation: it can only heat specific metal materials, such as 430 stainless steel and refined iron, and cannot heat cookware made of glass, ceramic, copper, aluminum, etc. Secondly, electromagnetic heating also has limitations on the distance between its coil and the cookware. If the distance exceeds a certain distance (about 15mm), it cannot heat effectively. Therefore, electromagnetic heating cannot heat the sides of the pot, resulting in no wok hei (wok aroma) during cooking, and the flavor and nutrients of the ingredients are not fully brought out. Utility Model Content
[0003] The main purpose of this utility model is to provide a cooking appliance that can heat any pot and effectively heat the pot wall.
[0004] To achieve the above objectives, the cooking utensil proposed in this utility model includes:
[0005] The main body includes a panel, and a heating area is provided on the upper side of the panel;
[0006] An electric heating device is disposed within the main body and corresponding to the heating area for heating a pot placed in the heating area. The electric heating device includes a first heating part and a second heating part arranged in sections, wherein the second heating part is located outside the first heating part and protrudes upward relative to the first heating part. ， To be positioned closer to the panel;
[0007] An electromagnetic heating device is disposed within the main body. The electromagnetic heating device includes a first coil assembly disposed below the electric heating device, and the electromagnetic field of the first coil assembly can pass upward through the electric heating device to electromagnetically heat a cookware placed in the heating area; and...
[0008] An electronic control device is electrically connected to the electric heating device and the electromagnetic heating device to control the operation of the electric heating device and the electromagnetic heating device.
[0009] The electronic control device is used to independently control the first heating element and the second heating element respectively.
[0010] In one embodiment, the second heating element extends upward beyond the first heating element by a dimension d1, where d1 ≥ 0.1 mm; and / or,
[0011] The electric heating device includes an infrared heating device.
[0012] In one embodiment, the second heating element is arranged in a ring shape and is arranged around the periphery of the first heating element.
[0013] In one embodiment, the first heating element and the second heating element are arranged in parallel.
[0014] In one embodiment, the electric heating device includes a heat insulation ring disposed between the first heating part and the second heating part to separate the first heating part and the second heating part.
[0015] In one embodiment, the first coil assembly is located below the first heating element and is at least partially offset from the first heating element or the second heating element.
[0016] In one embodiment, the electromagnetic heating device further includes a second coil assembly, which is disposed around the periphery of the first coil assembly and the electric heating device.
[0017] In one embodiment, the second coil assembly is arranged in a ring and includes multiple turns of coil arranged in layers along the vertical direction.
[0018] In one embodiment, the first coil assembly and the second coil assembly are arranged in parallel so that they can be independently controlled by the electronic control device.
[0019] In one embodiment, there is a gap d2 between the second coil assembly and the panel, where d2 ≥ 0.3 mm.
[0020] The technical solution of this utility model employs an electric heating device positioned within the main body corresponding to the heating area. This allows for the heating of any cookware within the heating area via electric heating, achieving the effect of cooking regardless of the type of cookware. Specifically, the electric heating device includes a first heating section and a second heating section arranged in sections. The second heating section is located outside the first heating section and protrudes upward relative to the first heating section. This allows the second heating section to effectively heat the pot wall. In conjunction with the first coil assembly, this results in the desired wok hei (wok aroma) during cooking, fully bringing out the flavor and nutrients of the ingredients. Attached Figure Description
[0021] 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.
[0022] Figure 1 An exploded structural diagram of an embodiment of the cooking appliance provided by this utility model;
[0023] Figure 2 A side-view internal sectional view of an embodiment of the cooking appliance provided by this utility model;
[0024] Figure 3 for Figure 2 A magnified view of a portion at point A;
[0025] Figure 4 for Figure 1 A top-view structural diagram of the electric heating device;
[0026] Figure 5 for Figure 2 Diagram showing the relative positions of the electric heating device, the electromagnetic heating device, and the panel;
[0027] Figure 6 for Figure 5 A magnified view of the area at point B;
[0028] Figure 7 A schematic diagram illustrating the heating principle of an embodiment of the cooking appliance provided by this utility model.
[0029] Explanation of icon numbers:
[0030] 100. Cooking appliance; 1. Main body; 11. Panel; 111. Heating area; 2. Electric heating device; 21. First heating part; 22. Second heating part; 23. Infrared heating device; 24. Heat insulation ring; 3. Electromagnetic heating device; 31. First coil assembly; 32. Second coil assembly; 321. Coil; 4. Electrical control device.
[0031] 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
[0032] 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.
[0033] 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.
[0034] 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.
[0035] Electromagnetic heating has a technical limitation: it can only heat specific metal materials, such as 430 stainless steel and refined iron, and cannot heat cookware made of glass, ceramic, copper, aluminum, etc. Secondly, electromagnetic heating also has limitations on the distance between its coil and the cookware. If the distance exceeds a certain distance (about 15mm), it cannot heat effectively. Therefore, electromagnetic heating cannot heat the sides of the pot, resulting in no wok hei (wok aroma) during cooking, and the flavor and nutrients of the ingredients are not fully brought out.
[0036] To address the aforementioned problems, this utility model proposes a cooking utensil that can heat any type of pot and effectively heat the pot's sides. Figures 1 to 7 A schematic diagram of the structure of one embodiment of the cooking appliance provided by this utility model.
[0037] Please refer to Figures 1 to 3In one embodiment of this utility model, the cooking appliance 100 includes a main body 1, an electric heating device 2, an electromagnetic heating device 3, and an electronic control device 4; the main body 1 includes a panel 11, and a heating area 111 is provided on the upper side of the panel 11; the electric heating device 2 is disposed inside the main body 1 and is disposed corresponding to the heating area 111, for heating the pot placed in the heating area 111; the electric heating device 2 includes a first heating part 21 and a second heating part 22 disposed in sections, wherein the second heating part 22 is located outside the first heating part 21, and the second heating part 22 protrudes upward relative to the first heating part 21. ， The electromagnetic heating device 3 is disposed closer to the panel 11 and is located within the main body 1. The electromagnetic heating device 3 includes a first coil assembly 31, which is disposed below the electric heating device 2. The electromagnetic field of the first coil assembly 31 can pass upward through the electric heating device 2 to electromagnetically heat the cookware placed in the heating area 111. The electronic control device 4 is electrically connected to the electric heating device 2 and the electromagnetic heating device 3 to control their operation. The electronic control device 4 independently controls the first heating element 21 and the second heating element 22.
[0038] The technical solution of this utility model is achieved by arranging the electric heating device 2 within the main body 1 at a position corresponding to the heating area 111, thereby heating any pot within the heating area 111 through electric heating, thus achieving the technical effect of cooking utensils 100% compatible with any pot; specifically, the electric heating device 2 includes a first heating part 21 and a second heating part 22 arranged in sections, wherein the second heating part 22 is located outside the first heating part 21 and protrudes upward relative to the first heating part 21, so that the second heating part 22 can effectively heat the pot wall, and with the cooperation of the first coil assembly 31, the cooking will produce wok hei (wok aroma), fully stimulating the flavor and nutrition of the ingredients.
[0039] Further, please refer to Figure 5 and Figure 6The second heating element 22 extends upward beyond the first heating element 21 by a dimension d1, where d1 ≥ 0.1 mm. It is understood that since the pot wall gradually extends along the thickness direction of the main body 1, the further away from the panel 11 the pot wall is from the panel, the more difficult it is to heat. Therefore, to further enhance the heating capacity and effect of the cooking appliance 100 on the pot wall, the second heating element 22 extends upward beyond the first heating element 21 by a dimension d1, where d1 ≥ 0.1 mm. This arrangement brings the second heating element 22 closer to the panel 11, and thus closer to the pot wall, ensuring that the pot wall is sufficiently heated.
[0040] Understandably, please refer to Figure 5 and Figure 6 The second heating element 22 protrudes upwards from the first heating element 21, with a protrusion of at least 0.1 mm. The specific protrusion size can be adjusted according to the actual dimensions of the cooking appliance 100 during manufacturing; no specific limitation is made here. Possible embodiments include: for example, the first heating element 21 and the second heating element 22 are on the same heat-insulating plane or on different planes of the same height, with the second heating element 22 being 0.1 mm thicker than the first heating element 21. This allows the second heating element 22 to be closer to the panel, thus better heating the pot wall; alternatively, the first heating element 21 and the second heating element 22 can have the same thickness, but the heat-insulating plane corresponding to the second heating element 22 is 0.1 mm higher than the heat-insulating plane corresponding to the first heating element 21. This also achieves the technical objective of the second heating element 22 protruding upwards relative to the first heating element 21; or, the thickness of the second heating element 22 plus the height of its corresponding heat-insulating plane is greater than the thickness of the first heating element 21 plus the height of its corresponding heat-insulating plane by 0.1 mm, which also satisfies the implementation requirements of this embodiment.
[0041] In addition, please refer to Figure 1 The electric heating device 2 includes an infrared heating device 23. It is understood that there are three specific modes of heat conduction: heat conduction, heat convection, and heat radiation.
[0042] Thermal radiation is the process by which non-contact objects transfer energy through electromagnetic waves. Since thermal radiation does not require any medium and has high heat transfer efficiency and low heat loss, the heated object is heated quickly with low energy consumption and high economic cost. Therefore, the electric heating device 2 includes the infrared heating device 23. Through the thermal radiation of the infrared heating device 23, the cooking appliance 100 can quickly heat the pot and pan with low power consumption and higher economic cost, making the cooking appliance 100 more economical.
[0043] In addition, please refer to Figures 2 to 4 The second heating element 22 is arranged in a ring shape and surrounds the first heating element 21. It is understood that the horizontal cross-section of the pot, that is, the cross-section of the pot wall, is ring-shaped. Therefore, in order to better heat the pot wall, the second heating element 22 is arranged in a ring shape and surrounds the first heating element 21. This arrangement makes the heat radiation direction of the second heating element 22 more consistent with the shape of the pot wall, thus further enhancing the heating of the pot wall. Combined with the heating of the pot bottom by the first heating element 21, this allows the cooking utensil 100 to produce a stronger wok hei (wok aroma) while fully bringing out the flavor and nutrients of the ingredients.
[0044] Furthermore, the first heating element 21 and the second heating element 22 are connected in parallel. It is understandable that during cooking, different ingredients require different cooking times at different stages, which is essentially temperature control. In some embodiments, the first heating element 21 and the second heating element 22 are connected in series, resulting in either both working simultaneously or stopping simultaneously. This arrangement leaves little room for maneuver in temperature control during cooking. Alternatively, to achieve independent control of the first heating element 21 and the second heating element 22 under series connection, an additional circuit needs to be connected in parallel to one of the heating elements. This makes the overall circuit design redundant and complex, increases the overall cost of the machine, and reduces its economic efficiency.
[0045] Therefore, in this embodiment, the first heating element 21 and the second heating element 22 are arranged in parallel, thereby enabling the electronic control device 4 to independently control the first heating element 21 and the second heating element 22 respectively. Thus, within the operating space where the first heating element 21 and the second heating element 22 work or stop working simultaneously, it is also possible to perform operations where the first heating element 21 works while the second heating element 22 stops working, or vice versa. Thus, without the need for additional circuitry, the electronic control device 4 can independently control the first heating element 21 and the second heating element 22 respectively, reducing the overall cost of the machine and improving its economy. At the same time, the cooking appliance 100 can independently control the first heating element 21 and the second heating element 22 according to the user's needs during cooking, thereby satisfying the user's temperature control requirements and making the cooked food more flavorful.
[0046] In addition, please refer to Figures 4 to 6 The electric heating device 2 includes a heat-insulating baffle ring 24 disposed between the first heating part 21 and the second heating part 22 to separate them. It is understood that the first heating part 21 faces the heating area 111 of the panel 11 to heat the bottom of the cookware. However, the heat radiation direction of the first heating part 21 is diffuse, meaning that a significant portion of the heat from the first heating part 21 is not radiated to the bottom of the cookware, thus greatly wasting electrical resources. Therefore, the electric heating device 2 includes the heat-insulating baffle ring 24, disposed between the first heating part 21 and the second heating part 22 to separate them. Simultaneously, the heat-insulating baffle ring 24 also helps to concentrate heat, further improving the heating efficiency of the first heating part 21 on the bottom of the cookware, reducing electrical waste, and improving the economy of the cooking appliance 100.
[0047] In addition, please refer to Figures 1 to 3 , Figure 5 and Figure 6 The first coil assembly 31 is located below the first heating element 21 and is at least partially offset from the first heating element 21 or the second heating element 22. It is understood that the cooking appliance 100 uses two heating modes to heat the pot. Specifically, the cooking appliance 100 employs an electric heating device 2, which uses the thermal effect of current and the device's own thermal radiation to heat the pot; and an electromagnetic heating device 3, which uses electromagnetic induction to induce eddy currents in the metal pot, causing it to heat itself. The two modes work together to heat the pot.
[0048] However, it is worth noting that the electric heating device 2 uses the heat effect generated by current flowing through a metal resistor to radiate heat into the cookware, while the first coil assembly 31 of the electromagnetic heating device 3 is located below the electric heating device 2. In some cases, to obtain sufficiently high heating power, a hybrid heating mode is used. In this mode, the electric heating device 2 and the electromagnetic heating device 3 operate simultaneously. After prolonged operation, the effect of the electric heating device 2 causes the temperature of the coil 321 of the electromagnetic heating device 3 to rise sharply, leading to damage to the insulation layer of the coil 321 and even burnout, affecting the safe use of the cooking appliance 100. Furthermore, when the electric heating device 2 is operating, its heat is conducted to the coil 321, increasing its temperature and resistance, thus reducing its eddy current induction capability. This also affects the heating effect of the electromagnetic heating device 3 on the metal cookware.
[0049] Therefore, in this embodiment, the first coil assembly 31 is located below the first heating element 21 and is at least partially offset from the first heating element 21 or the second heating element 22. Thus, when the temperature of the electromagnetic heating device 3 is too high, it can be detected by a temperature sensor, or the temperature of the electromagnetic heating device 3 can be indirectly determined by timing the mixed heating mode and the working time. Part of the heating element can be turned off, while the heating element offset from the first coil assembly 31 can be turned on. In this way, on the one hand, the mixed heating mode can be maintained to avoid a significant drop in processing power, and on the other hand, the influence of the electric heating device 2 on the first coil assembly 31 of the electromagnetic heating device 3 can be reduced, which provides a certain degree of protection for the coil 321 of the electromagnetic heating device 3, thereby improving the reliability and safety of the cooking appliance 100.
[0050] In addition, please refer to Figures 1 to 3The electromagnetic heating device 3 further includes a second coil assembly 32, which is arranged around the first coil assembly 31 and the electric heating device 2. It is understood that when the cookware is not made of metal, heating the pot wall requires the second heating element 22 of the electric heating device 2 to provide thermal radiation. However, when the cookware is made of metal, the pot wall can be heated simultaneously by the thermal radiation of the second heating element 22 and by the eddy current induction of the electromagnetic heating device 3. However, the arrangement of the first coil assembly 31 of the electromagnetic heating device 3 is insufficient for heating the pot wall, resulting in poor eddy current induction heating. Therefore, the electromagnetic heating device 3 includes a second coil assembly 32, which is arranged around the first coil assembly 31 and the electric heating device 2. Specifically, the second coil assembly 32 is designed for metal cookware to generate eddy current induction and heat the pot wall. Combined with the second heating element 22, this allows for faster heating of the metal cookware wall, further improving cooking efficiency.
[0051] Further, please refer to Figures 1 to 3 The second coil assembly 32 is arranged in a ring shape and includes multiple turns of coil 321 arranged in layers along the vertical direction. It is understood that the pot wall of the cookware extends along the thickness direction of the main body 1, and its horizontal cross-section is ring-shaped. Therefore, in order to better induce electromagnetic induction in the pot wall of the metal cookware for heating, the second coil assembly 32 is arranged in a ring shape and includes multiple turns of coil 321 arranged in layers along the vertical direction. This effectively helps the pot wall of the metal cookware to self-heat due to eddy current induction in the vertical direction, further improving the heating efficiency of the cooking appliance 100.
[0052] Furthermore, the first coil assembly 31 and the second coil assembly 32 are arranged in parallel so that they can be independently controlled by the electronic control device 4. It is understood that during cooking, different ingredients have corresponding requirements for heat control at different stages of cooking; heat control is essentially temperature control. In some embodiments, the first coil assembly 31 and the second coil assembly 32 are connected in series, resulting in either simultaneous operation or simultaneous shutdown of both. This arrangement leaves little room for maneuver in temperature control during cooking. Alternatively, to achieve independent control of the first coil assembly 31 and the second coil assembly 32 under series connection, an additional circuit needs to be connected in parallel to one of the coil assemblies. This makes the overall circuit design redundant and complex, increases the overall cost of the machine, and reduces its economic efficiency.
[0053] Therefore, in this embodiment, the first coil assembly 31 and the second coil assembly 32 are arranged in parallel, thereby enabling the electronic control device 4 to independently control the first coil assembly 31 and the second coil assembly 32 respectively. Thus, within the operating space where the first coil assembly 31 and the second coil assembly 32 work simultaneously or stop working simultaneously, it is also possible to perform operations where the first coil assembly 31 works while the second coil assembly 32 stops working, or the second coil assembly 32 works while the first coil assembly 31 stops working, without the need for additional circuit settings. This allows the electronic control device 4 to independently control the first heating element 21 and the second heating element 22 respectively, reducing the overall cost of the machine and improving its economy. At the same time, it enables the cooking appliance 100 to independently control the first coil assembly 31 and the second coil assembly 32 according to the user's needs during cooking, thereby satisfying the user's temperature control and making the cooked food more flavorful.
[0054] It is understandable that the electromagnetic heating device 3 and the electric heating device 2 can also be connected in parallel. This allows for the selection of a suitable heating method based on the material of the cookware, user preferences, or cooking needs. Such a configuration also provides more operational flexibility in temperature control during cooking and offers better applicability.
[0055] Further, please refer to Figure 3 The second coil assembly 32 has a gap d2 between it and the panel 11, where d2 ≥ 0.3 mm. It is understood that when the cookware is heated to a high temperature, heat transfer occurs because the bottom of the cookware is in physical contact with the panel 11, causing the panel 11 to reach a very high temperature. Since the second coil assembly 32 includes multiple coils 321 arranged in layers along the vertical direction, some coils 321 will inevitably be closer to the panel 11. If these coils are too close to the panel 11, they are easily heated to very high temperatures, potentially damaging the second coil assembly 32. Therefore, to prevent the second coil assembly 32 from being damaged by the panel 11, a gap d2 ≥ 0.3 mm is maintained between it and the panel 11. This arrangement ensures that the coil 321 closest to the panel 11 will not be damaged by high temperatures, thereby improving the safety and reliability of the cooking appliance 100 and further extending its service life.
[0056] It is understandable that air is a poor conductor of heat. Therefore, a gap of at least 0.3 mm between the second coil assembly 32 and the panel 11 can adequately protect the second coil assembly 32 from damage caused by the high temperature of the panel 11. Of course, a greater distance is not necessarily better, as too much distance will affect the heating effect on the wall of the metal cookware. As for the specific distance, no specific limit is made here, and it depends on the actual production needs of the cooking utensil 100.
[0057] 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 cooking device, comprising: a main body comprising a panel, an upper side of the panel being provided with a heating area; The electric heating device is arranged in the main body and corresponds to the heating area, and is used for heating the pot placed on the heating area. The electric heating device comprises a first heating part and a second heating part arranged in different zones. The second heating part is located at the periphery of the first heating part, and the second heating part is arranged in a protruding manner upwards relative to the first heating part ， closer to the panel; an electromagnetic heating device arranged in the main body, the electromagnetic heating device comprising a first coil assembly arranged on the lower side of the electromagnetic heating device, and an electromagnetic field of the first coil assembly being capable of penetrating the electromagnetic heating device upwards to perform electromagnetic heating on a pot placed on the heating area; and an electric control device electrically connected with the electromagnetic heating device and the electric heating device to control the electromagnetic heating device and the electric heating device. The electric control device is used to independently control the first heating part and the second heating part.
2. The cooking appliance of claim 1, wherein, The size of the second heating part exceeding the first heating part upwards is d1, and d1 is greater than or equal to 0.1 mm; and / or The electric heating device comprises an infrared heating device.
3. The cooking appliance of claim 1, wherein, The second heating part is arranged in a ring shape and surrounds the periphery of the first heating part.
4. The cooking appliance of claim 1, wherein, The first heating part and the second heating part are arranged in parallel.
5. The cooking appliance of claim 1, wherein, The electric heating device comprises a heat insulation ring arranged between the first heating part and the second heating part to separate the first heating part and the second heating part.
6. The cooking appliance of claim 1, wherein, The first coil assembly is arranged on the lower side of the first heating part and is at least partially staggered with the first heating part or the second heating part.
7. The cooking appliance of claim 1, wherein, The electromagnetic heating device further comprises a first coil assembly corresponding to the first coil assembly and the periphery of the electric heating device.
8. The cooking appliance of claim 7, wherein, The first coil assembly is arranged in a ring shape and comprises a plurality of turns of coils arranged in layers in the up-down direction.
9. The cooking appliance of claim 7, wherein, The first coil assembly and the first coil assembly are arranged in parallel to be independently controlled by the electric control device.
10. The cooking appliance of claim 7, wherein, The first coil assembly and the panel are separated by a distance d2, and d2 is greater than or equal to 0.3 mm.