Oven

Abstract

The invention provides an oven, which comprises an oven body, an oven cover, an oven cover and an oven cover, wherein the oven body is internally provided with a cooking cavity; the at least one heating mechanism is arranged at the top and / or the bottom of the cooking cavity, each heating mechanism comprises a first electric heating body arranged along a preset heating surface, and the preset heating surface is arranged towards the cooking cavity; and the second electric heating bodies are arranged along the preset heating surface and are arranged on the periphery of the first electric heating body, and the working temperature of the second electric heating bodies is higher than that of the first electric heating body. According to the oven, food materials placed at the bottom of the cooking cavity can be evenly heated, the consistency of the cooking degree of the food materials can be well guaranteed, the phenomenon that the food materials in the center area of the bottom of the cooking cavity are cooked but the food materials in the peripheral area are not cooked is effectively avoided, or the phenomenon that the food materials in the center area of the bottom of the cooking cavity are burnt is effectively avoided; therefore, the use experience of the user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ovens, in particular to an oven. Background Art

[0002] An oven is a kitchen appliance that uses heat radiation from an electric heating element to bake food. It can be used to prepare pasta dishes like bread and biscuits, as well as meat dishes like chicken wings and skewers. It is widely used in daily life. With the development of science and technology, people's living standards have gradually improved, and the demand for oven usage has also become increasingly higher.

[0003] Currently, in the existing technology, electric heating elements are generally arranged on the top surface of the oven's cooking cavity, and the electric heating elements radiate heat toward the bottom of the cooking cavity. At the same time, when users are roasting food, they will place the food at the bottom of the cooking cavity and arrange it from the center to the periphery. However, during the process of roasting food, the temperature at the center of the electric heating element is the highest. The food at the bottom center of the cooking cavity is radiated from all angles by the entire electric heating element, causing the food in the bottom center area of ​​the cooking cavity to heat the fastest, while the temperature of the food in the surrounding areas is relatively low and matures the slowest. This results in the phenomenon that the food in the bottom center area of ​​the cooking cavity is cooked while the food in the surrounding areas is not cooked. It may even cause the food in the middle of the cooking cavity to be burnt and the food around it to be uncooked, which reduces the user experience. Summary of the Invention

[0004] An object of the present invention is to provide an oven that can solve at least one of the above-mentioned drawbacks of the prior art.

[0005] A further object of the present invention is to ensure that the ingredients placed at the bottom of the cooking cavity are heated evenly, to ensure the consistency of the degree of doneness of the ingredients, and to effectively avoid the phenomenon that the ingredients in the center area of ​​the bottom of the cooking cavity are cooked while the ingredients in the surrounding areas are not cooked, or the phenomenon that the food in the center area of ​​the bottom of the cooking cavity is burnt while the ingredients in the surrounding areas are not cooked, thereby improving the user experience.

[0006] In particular, the present invention provides an oven comprising:

[0007] A box body, in which a cooking cavity is provided;

[0008] At least one heating mechanism is provided at the top and / or bottom of the cooking cavity, each heating mechanism comprising:

[0009] A first electric heating element is arranged along a predetermined heating surface, and the predetermined heating surface is arranged toward the cooking cavity;

[0010] The second electric heating element is arranged along the preset heating surface and around the first electric heating element. The working temperature of the second electric heating element is greater than the working temperature of the first electric heating element.

[0011] Further, a ratio of a heat power of the first electric heater to a heat power of the second electric heater ranges from 1 / 9 to 3 / 17; and

[0012] The second electric heater is arranged to surround the first heating area on the preset heating surface, and the second electric heater occupies the second heating area on the preset heating surface, the second heating area being located around the first heating area, the first electric heater being arranged in the first heating area, and a ratio of areas of the first heating area to the second heating area ranges from 1 / 3 to 7 / 13.

[0013] Further, an area of the first heating area to an area of the preset heating surface ranges from 25% to 35%; and

[0014] An area of the second heating area to the area of the preset heating surface ranges from 65% to 75%.

[0015] Further, a middle part of the first heating area is provided with a blank area, and the first electric heater is arranged around the blank area.

[0016] Further, each heating mechanism further comprises:

[0017] The base plate is arranged in the box and faces the preset heating surface of the cooking cavity.

[0018] Further, the material of the base plate comprises at least one of microcrystalline glass, quartz glass, mica, ceramic and stainless steel.

[0019] Further, the first electric heater and the second electric heater are arranged on the base plate by thick film heating technology; or

[0020] The first electric heater and the second electric heater are arranged on the base plate by graphene high-temperature coating.

[0021] Further, the first electric heater and the second electric heater are both in a strip shape; and

[0022] The first electric heater is arranged to bend at least one circle in the first heating area, and the second electric heater is arranged to wind at least two circles around the first heating area in the second heating area.

[0023] Further, the first electric heater and the second electric heater have independent power supply access points.

[0024] Further, the second heating area is further provided with a power supply wiring area extending from the second heating area to the edge of the base plate; and

[0025] The first electric heater is arranged to extend around the edge of the first heating area, and both ends of the first electric heater extend to the edge of the base plate through the power supply wiring area;

[0026] The second electric heating element is arranged in a curved manner around the first heating area in the second heating area, and the second electric heating element is bent near the power connection area, and both ends of the second electric heating element are close to the power connection area or extend to the edge of the substrate in the power connection area; and

[0027] The power supply access point of the first electric heating element is located at its end, and the power supply access point of the second electric heating element is located at its end.

[0028] Furthermore, a power supply connection area extending from the second heating area to the edge of the substrate is further provided in the second heating area; and

[0029] The first electric heating element is connected to the second electric heating element, and the first electric heating element and the second electric heating element are an integrated structure, and the first electric heating element and the second electric heating element have a shared power supply access point; and

[0030] The first electric heating element is bent and wound along the edge of the first heating area, and the first end of the first electric heating element passes through the power supply connection area and extends to the edge of the substrate;

[0031] The first end of the second electric heating element is connected to the second end of the first electric heating element, the second end of the second electric heating element is bent around the first heating area and extends to the edge of the substrate, and the second electric heating element is bent near the power connection area; and

[0032] Power supply access points of the first electric heating element and the second electric heating element are located at a first end of the first electric heating element and a second end of the second electric heating element.

[0033] Furthermore, the heating mechanism is also arranged on the side of the cooking cavity.

[0034] The oven of the present invention has a heating mechanism comprising a first electric heater and a second electric heater. The first electric heater and the second electric heater are arranged along the same preset heating surface, the preset heating surface is arranged toward the cooking cavity, and the second electric heater is arranged around the second electric heater. The operating temperature of the second electric heater is greater than the operating temperature of the first electric heater. That is, the operating temperature around the heating mechanism is greater than the operating temperature at the center. Furthermore, due to the influence of the radiation angle, the peripheral food at the bottom of the cooking cavity is greatly affected by the second electric heater directly above it. The food at the center of the bottom of the cooking cavity is not only affected by the heat radiation from the first electric heater, but also by the heat radiation from the second electric heater with a higher temperature. The food at the center of the bottom of the cooking cavity will be evenly radiated by the low-temperature zone of the first electric heater and the high-temperature zone of the second electric heater. Under the combined effect, the food at the center of the bottom of the cooking cavity and the peripheral food will be heated at a uniform rate and will be cooked at the same time. Therefore, the oven of the present invention can heat the ingredients placed at the bottom of the cooking cavity evenly, can well ensure the consistency of the degree of doneness of the ingredients, and effectively avoid the phenomenon that the ingredients in the center area of ​​the bottom of the cooking cavity are cooked while the ingredients in the surrounding areas are not cooked, or the phenomenon that the food in the center area of ​​the bottom of the cooking cavity is burnt while the ingredients in the surrounding areas are not cooked, thereby improving the user experience.

[0035] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0037] Figure 1 is a schematic structural diagram of an oven according to an embodiment of the present invention;

[0038] Figure 2 is a schematic perspective view of an oven according to one embodiment of the present invention;

[0039] Figure 3 This is one of the structural schematic diagrams of a heating mechanism in an oven according to one embodiment of the present invention;

[0040] Figure 4 is a schematic diagram corresponding to food, a first heating zone, and a second heating zone in an oven according to one embodiment of the present invention;

[0041] Figure 5 This is a second structural diagram of a heating mechanism in an oven according to an embodiment of the present invention;

[0042] Figure 6This is a third structural diagram of a heating mechanism in an oven according to an embodiment of the present invention;

[0043] Figure 7 This is the fourth structural schematic diagram of the heating mechanism in an oven according to an embodiment of the present invention. DETAILED DESCRIPTION

[0044] In the description of this embodiment, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0045] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features, that is, include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. When a feature "includes or contains" one or more of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may further include other features.

[0046] Unless otherwise specified or limited, the terms "installed," "installed," and "connected" should be interpreted broadly. For example, they can refer to fixed or removable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components, unless otherwise specified. A person of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0047] In addition, in the description of this embodiment, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact via another feature between them. That is, in the description of this embodiment, the first feature being "above," "above," and "above" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below," "below," or "below" the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0048] Unless otherwise defined, all terms (including technical terms and scientific terms) used in the description of this embodiment have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0049] In the description of this embodiment, reference to terms such as "this embodiment," "implementation," or "some embodiments" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0050] The following is based on Figures 1 to 7 The oven of this embodiment will be described in detail. Figure 1 is a schematic structural diagram of an oven according to an embodiment of the present invention; Figure 2 is a schematic perspective view of an oven according to one embodiment of the present invention; Figure 3 This is one of the structural schematic diagrams of a heating mechanism in an oven according to one embodiment of the present invention; Figure 4 is a schematic diagram corresponding to food, a first heating zone, and a second heating zone in an oven according to one embodiment of the present invention; Figure 5 This is a second structural diagram of a heating mechanism in an oven according to an embodiment of the present invention; Figure 6 This is a third structural diagram of a heating mechanism in an oven according to an embodiment of the present invention; Figure 7 This is the fourth structural schematic diagram of the heating mechanism in an oven according to an embodiment of the present invention.

[0051] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 4 In this embodiment, the oven includes a housing 100 and at least one heating mechanism 200. A cooking cavity 110 is disposed within the housing 100. At least one heating mechanism 200 is disposed at the top and / or bottom of the cooking cavity 110. Each heating mechanism 200 includes a first heating element 210 and a second heating element 220. The first heating element 210 is arranged along a predetermined heating surface 231, which faces the cooking cavity 110. The second heating element 220 is arranged along the predetermined heating surface 231 and is disposed around the first heating element 210. The operating temperature of the second heating element 220 is greater than that of the first heating element 210.

[0052] Because the heating mechanism 200 of the oven of this embodiment includes a first electric heater 210 and a second electric heater 220, which are arranged along the same predetermined heating surface 231, which faces the cooking cavity 110. The second electric heater 220 is arranged around the perimeter of the second electric heater 220, and the operating temperature of the second electric heater 220 is higher than that of the first electric heater 210. In other words, the operating temperature around the perimeter of the heating mechanism 200 is higher than the operating temperature at its center. Furthermore, due to the radiation angle, the food 300 at the bottom of the cooking cavity 110 is significantly affected by the second electric heater 220 directly above it. Meanwhile, the food 300 at the center of the bottom of the cooking cavity 110 receives heat radiation from both the first electric heater 210 and the higher-temperature second electric heater 220. Consequently, the food at the center of the bottom of the cooking cavity 110 is evenly exposed to both the low-temperature area of ​​the first electric heater 210 and the high-temperature area of ​​the second electric heater 220. Due to this combined effect, the food in the center and surrounding areas of the bottom of the cooking cavity 110 are heated evenly, and are cooked simultaneously. Therefore, the oven of this embodiment can evenly heat the food placed at the bottom of the cooking cavity 110, ensuring the consistency of the doneness of the food. This effectively avoids the situation where food in the center of the bottom of the cooking cavity 110 is cooked while food in the surrounding areas is not, or food 300 is burnt in the center of the bottom of the cooking cavity 110 while food around it is not, thereby improving the user experience.

[0053] Furthermore, when sugary food 300 is heated and undergoes a Maillard reaction or caramelization reaction, the carbohydrates and proteins in the food react, producing a fragrance and varying degrees of color. However, if the food placed at the bottom of cooking chamber 110 is unevenly heated, the sugars in the food will be unevenly heated, resulting in uneven coloring, further reducing the user experience. In this embodiment, while the above-described arrangement of first and second electric heaters 210, 220 ensures uniform heating of the food and consistent doneness, it also ensures uniform coloring of the sugary food 300, further enhancing the oven user experience.

[0054] It should be noted that a single heating mechanism 200 can be provided, and can be located at the top of the cooking cavity 110; alternatively, the heating mechanism 200 can be located at the bottom of the cooking cavity 110 to achieve grilling, cooking, and browning of the food 300. Furthermore, two heating mechanisms 200 can be provided, one at the top and one at the bottom of the cooking cavity 110, to further ensure uniform heating of the food 300 from top to bottom, facilitating simultaneous radiant heating of the upper and lower surfaces of the food 300, promoting uniform browning of the food, and achieving a crispy exterior and tender interior.

[0055] In this embodiment, the heating mechanism 200 is also disposed on the side of the cooking cavity 110. For example, the heating mechanism 200 may be disposed on the left side wall of the cooking cavity 110; the right side wall of the cooking cavity 110; or the rear side wall of the cooking cavity 110. This ensures temperature uniformity throughout the cooking cavity 110.

[0056] Reference Figure 3 and Figure 5 (or Figure 7 ), in this embodiment, the ratio of the thermal power of the first electric heating body 210 to the thermal power of the second electric heating body 220 ranges from 1 / 9 to 3 / 17; and, the second electric heating body 220 is arranged on a preset heating surface 231 to surround a first heating zone 232, and the second electric heating body 220 occupies a second heating zone 233 on the preset heating surface 231, the second heating zone 233 is located around the first heating zone 232, the first electric heating body 210 is arranged in the first heating zone 232, and the area ratio of the first heating zone 232 to the second heating zone 233 ranges from 1 / 3 to 7 / 13.

[0057] It should be understood that by setting the thermal power ratio of the first electric heating body 210 and the second electric heating body 220, as well as the area ratio of the first heating zone 232 and the second heating zone 233, a gradient of the operating temperatures of the second electric heating body 220 and the first electric heating body 210 can be achieved, that is, the operating temperature of the second electric heating body 220 can be greater than the operating temperature of the first electric heating body 210.

[0058] Reference Figure 5 or Figure 7 In this embodiment, the area ratio of the first heating zone 232 to the preset heating surface 231 ranges from 25% to 35%; and the area ratio of the second heating zone 233 to the preset heating surface 231 ranges from 65% to 75%.

[0059] It should be understood that by setting the area ratio of the first heating zone 232 and the second heating zone 233 to the preset heating surface 231 within the aforementioned range, the utilization rate of the preset heating surface 231 can be ensured. Furthermore, by actually simulating the oven of this embodiment, real-time monitoring and calculation of the temperature within the cooking cavity 110, combined with the aforementioned thermal power ratio of the first and second electric heaters 210 and 220 and the area ratio of the first and second heating zones 232 and 233, the temperature difference between various locations within the cooking cavity 110 can be maintained within 5°C. This effectively ensures the overall temperature uniformity within the cooking cavity 110 of the oven, further ensuring the consistency of the doneness of the ingredients. This effectively prevents the occurrence of ingredients being cooked in the center of the bottom of the cooking cavity 110 while being undercooked in the surrounding areas, or the occurrence of food 300 being burnt in the center of the bottom of the cooking cavity 110 while being undercooked in the surrounding areas. Furthermore, this ensures the uniformity of the coloring of the carbohydrate food 300, further enhancing the user experience.

[0060] Reference Figure 5 or Figure 7 In this embodiment, a blank area 234 is provided in the middle of the first heating area 232 , and the first electric heating element 210 is arranged around the blank area 234 .

[0061] It is understandable that the provision of the blank area 234 can ensure that the area occupied by the first heating zone 232 is maintained while also ensuring that the first electric heating element 210 has a smaller available area, thereby ensuring that the first electric heating element 210 has a smaller thermal power, thereby ensuring that a temperature gradient is formed between the first electric heating element 210 and the second electric heating element 220 in the first heating zone 232 and the second heating zone 233. Furthermore, the blank area 234 may correspond to the very center of the bottom of the cooking cavity 110. No electric heating element is provided in the blank area 234 to further prevent the occurrence of cooked ingredients in the center of the bottom of the cooking cavity 110 while those in the surrounding areas are not, or the occurrence of burnt food 300 in the center of the bottom of the cooking cavity 110 while those in the surrounding areas are not. This also ensures uniform coloring of the sugary food 300, further enhancing the user experience.

[0062] In this embodiment, the oven may further include a fan and an air duct structure for providing air convection in the cooking cavity 110. Under the effect of air convection, the temperature uniformity in the cooking cavity 110 can be further ensured.

[0063] Reference Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 and Figure 7 In this embodiment, the preset heating surface 231 can be a plane parallel to the bottom wall of the cooking cavity 110, or it can be a curved surface with the middle portion convex and curved away from the cooking cavity 110.

[0064] Reference Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 and Figure 7 In this embodiment, each heating mechanism 200 further includes a base plate 230 . The base plate 230 is disposed in the housing 100 , and the surface of the base plate 230 facing the cooking cavity 110 is a preset heating surface 231 .

[0065] It is understandable that the substrate 230 can provide a placement carrier for the first electric heating body 210 and the second electric heating body 220 , so that the first electric heating body 210 and the second electric heating body 220 are placed in the cooking cavity 110 .

[0066] Furthermore, when the first and second electric heating elements 210 and 220 are energized, they heat up, and this heat is transferred to the base plate 230, causing the overall temperature of the base plate 230 to rise. The pre-set heating surface 231 on the base plate 230 acts as a surface heating source to heat the air and food 300 in the oven. Under the high-temperature radiation of the pre-set heating surface 231 of the base plate 230, the temperature of the food 300 in the oven rises, sugars reach a caramelizing temperature and color, and proteins mature at high temperatures. Furthermore, it can be understood that the provision of the base plate 230 directs the heat generated by the first and second electric heating elements 210 and 220 toward the cooking chamber 110, and utilizes the pre-set heating surface 231 as a surface heating source (compared to providing only the first and second electric heating elements 210 and 220), both of which effectively ensure heat utilization and further ensure uniform temperature distribution within the cooking chamber 110.

[0067] In this embodiment, the material of the substrate 230 includes at least one of microcrystalline glass, quartz glass, mica, ceramics, and stainless steel.

[0068] Understandably, glass-ceramic, quartz glass, ceramic, and stainless steel meet the requirements of high-temperature oven applications due to their high hardness, mechanical strength, wear resistance, high temperature resistance above 700°C, thermal stability at high temperatures, high thermal shock resistance, resistance to deformation, and resistance to acid and alkali corrosion. This ensures the oven's service life and design requirements.

[0069] In addition, the substrate 230 can preferably be made of a microcrystalline glass plate or a quartz glass plate. Furthermore, the side of the substrate facing the food may be provided with not only a heating coating (the first electric heating element 210 and the second electric heating element 220), but also an enhanced heat radiation coating, so that the heat generation rate of this surface is as high as 0.8 to 0.9. The other side of the substrate may not be provided with the enhanced heat radiation coating, but may have a heat generation rate of 0.1 to 0.2, further ensuring that as much heat generated by the first electric heating element 210 and the second electric heating element 220 is radiated to the food side as possible, thereby enhancing heat utilization.

[0070] In some embodiments, the preset heating surface 231 can be a virtual surface where the first heating element and the second heating element are extended. That is, the first heating element and the second heating element can be directly set to the top and / or bottom of the cooking cavity 110 through components such as brackets and hangers.

[0071] In some embodiments, the first electric heating element 210 and the second electric heating element 220 may both be carbon steel heating tubes.

[0072] However, due to the rigidity and bending radius of the carbon steel heating tube, the power distribution design is not flexible.

[0073] In one implementation of the materials of the first electric heating element 210 and the second electric heating element 220 of this embodiment, the first electric heating element 210 and the second electric heating element 220 are disposed on the substrate 230 by using thick film heating technology.

[0074] It should be understood that thick film heating technology is a process of combining superconducting ceramic materials into a slurry using micropowders and a binding solvent, printing the slurry in the form of circuit wiring or a pattern on a substrate using screen printing technology, and sintering it through a strict heat treatment process. That is, the materials of the first electric heater 210 and the second electric heater 220 may include superconducting ceramics. And because the thick film heating technology can flexibly configure the width, thickness, overall length, spacing or area occupied by the electric heater at various locations on the substrate 230, it can effectively overcome the defect of the inflexible power distribution design of the carbon steel heating tube, and can effectively promote the realization of the temperature gradient between the first electric heater 210 and the second electric heater 220.

[0075] In addition, compared with the carbon steel heating tube as the heat source for baking food 300, under the same heating power, the heat flux density of the heating mechanism 200 manufactured by thick film heating technology is small. During the operation of the oven, the temperature of the heating mechanism 200 is 200℃~300℃ lower than that of the carbon steel heating tube, and the overall oven working environment is safer.

[0076] In another embodiment of the materials of the first electric heating element 210 and the second electric heating element 220 of the present embodiment, the first electric heating element 210 and the second electric heating element 220 are provided on the substrate 230 in the form of an ultra-thin high-temperature nano coating.

[0077] It should be understood that the ultra-thin high-temperature nano coating is an electric heating coating with a thickness at the nanometer level (usually less than 1 micron or even lower). Furthermore, the materials of the first electric heating element 210 and the second electric heating element 220 can be nano metals (nickel, chromium, molybdenum, etc. and their alloys), nano semiconductors (silicon, silicon nitride, zinc oxide, etc.), carbon-based nano (graphene, carbon nanotubes, etc.), etc. Furthermore, the thermal power of the electric heating element can be flexibly configured by its thickness, distribution, etc., and similarly, the defect of the inflexible power distribution design of the carbon steel heating tube can be overcome, thereby promoting the realization of the temperature gradient between the first electric heating element 210 and the second electric heating element 220. In addition, the first electric heating element 210 and the second electric heating element 220, on the basis of flexible configuration, also have high temperature resistance, oxidation resistance, corrosion resistance, as well as excellent thermal stability, thermal conductivity and other properties.

[0078] In another embodiment of the materials of the first electric heating element 210 and the second electric heating element 220 of this embodiment, the first electric heating element 210 and the second electric heating element 220 are disposed on the substrate 230 through a graphene high-temperature coating.

[0079] It should be understood that the material of the first electric heating element 210 and the second electric heating element 220 can be graphene. Moreover, similar to thick film technology, the electric heating element formed by graphene can be flexibly configured in terms of width, thickness, overall length, spacing, or occupied area at various locations on the substrate 230, thereby effectively overcoming the inflexible power distribution design of carbon steel heating tubes and effectively promoting the realization of a temperature gradient between the first electric heating element 210 and the second electric heating element 220.

[0080] In this embodiment, the heating power of the first heating element 210 can be determined based on its width, thickness, overall length and the spacing of the first heating element 210. The heating power of the second heating element 220 can be determined based on its width, thickness, overall length and the spacing of the second heating element 220.

[0081] In this embodiment, the manufacturing process of the heating mechanism 200 may be to first divide the heating mechanism 200 into a first heating zone 232 and a second heating zone 233 , and then adjust the resistance of the coating in each heating zone in a circuit form according to power requirements.

[0082] In this embodiment, compared to a heating mechanism 200 equipped with a carbon steel heating tube, the heating components of this embodiment are flat and regularly shaped. The pre-set heating surface 231 of the heating mechanism 200 is easy to clean and maintain, providing a better user experience. Furthermore, compared to a heating mechanism 200 without a base plate 230, the heating mechanism 200 of this embodiment provides a larger heating radiation coverage area, allowing the food 300 to receive the radiation energy evenly, resulting in easier and more uniform browning.

[0083] In the embodiment, the first electric heater 210 and the second electric heater 220 are both in the shape of a strip; and the first electric heater 210 is wound at least one circle in the first heating area 232, and the second electric heater 220 is wound at least two circles around the first heating area 232 in the second heating area 233.

[0084] It can be understood that, by winding the first electric heater 210 at least one circle in the first heating area 232, the heat power of the first electric heater 210 can be ensured to meet the requirements while the uniformity of the temperature in the first heating area 232 is ensured. Similarly, by winding the second electric heater 220 at least two circles around the first heating area 232 in the second heating area 233, the heat power of the second electric heater 220 can be ensured to meet the requirements while the uniformity of the temperature in the second heating area 233 is ensured. Moreover, the working temperature of the second electric heater 220 can be effectively promoted to be greater than that of the first electric heater 210 (the temperature of each part of the second heating area 233 is greater than that of each part of the first heating area 232).

[0085] Referring to Figure 3 and Figure 5 In one embodiment of the specific layout of the first electric heater 210 and the second electric heater 220 in the embodiment, the first electric heater 210 and the second electric heater 220 have independent power supply access points 240.

[0086] It can be understood that, since the power supply of the first electric heater 210 and the second electric heater 220 is independent, the heat power of the first electric heater 210 and the second electric heater 220 can be further determined by the current value flowing through the first electric heater 210 and the second electric heater 220, respectively. Further, in the case that the first electric heater 210 and the second electric heater 220 are respectively determined in width, thickness, overall length, and spacing, i.e., the first electric heater 210 has been arranged in the first heating area 232 and the second electric heater 220 has been arranged in the second heating area 233, the heat power of the first electric heater 210 and the second electric heater 220 can be determined by the current value flowing through the first electric heater 210 and the second electric heater 220, respectively. In this way, the first heating area 232 and the second heating area 233 (or the first electric heater 210 and the second electric heater 220) can be respectively controlled by separate power supply and heating, the power can be individually regulated, the double-circle double-control can be realized, and the overall surface temperature distribution of the preset heating surface 231 can be adjusted to adapt to different cooking modes of the oven.

[0087] Referring to Figure 3 and Figure 5In this embodiment, a power connection area 235 extending from the second heating area 233 to the edge of the substrate 230 is also provided in the second heating area 233; and the first electric heating body 210 is extended and wrapped along the edge of the first heating area 232, and both ends of the first electric heating body 210 pass through the power connection area 235 and extend to the edge of the substrate 230; the second electric heating body 220 is bent around the first heating area 232 in the second heating area 233, and the second electric heating body 220 is bent near the power connection area 235, and both ends of the second electric heating body 220 are close to the power connection area 235 or extend to the edge of the substrate 230 in the power connection area 235; and the power supply access point 240 of the first electric heating body 210 is located at its end, and the power supply access point 240 of the second electric heating body 220 is located at its end.

[0088] It is understood that the provision of the power connection area 235 allows the first electric heating element 210 to be connected to the power supply and avoids interference between the first electric heating element 210 and the second electric heating element 220. Furthermore, by extending and winding the first electric heating element 210 along the edge of the first heating area 232, the blank area 234 described in the above embodiment can be formed. Furthermore, the arrangement of the first electric heating element 210 and the second electric heating element 220 in this embodiment, with its rational layout and area utilization, ensures the operating performance of the heating mechanism 200.

[0089] In addition, the operating temperature of the portion of the first electric heating body 210 arranged in the power connection area 235 (or in the second heating area 233) is greater than the temperature of the portion of the first electric heating body 210 arranged in the first heating area 232, and the operating temperature of the portion of the first electric heating body 210 arranged in the power connection area 235 (or in the second heating area 233) can be configured to be the same as the operating temperature of the second electric heating body 220, so as to cause the temperature at various locations in the second heating area 233 to be greater than the temperature at various locations in the first heating area 232 when the first electric heating body 210 and the second electric heating body 220 are powered on.

[0090] Reference Figure 6 and Figure 7In another embodiment of the specific layout of the first electric heating element 210 and the second electric heating element 220 of the present embodiment, a power supply connection area 235 extending from the second heating area 233 to the edge of the substrate 230 is further provided in the second heating area 233; and the first electric heating element 210 is connected to the second electric heating element 220, and the first electric heating element 210 and the second electric heating element 220 are an integrated structure, and the first electric heating element 210 and the second electric heating element 220 have a shared power supply access point 240; and the first electric heating element 210 is bent along the edge of the first heating area 232 The first end of the first electric heating body 210 passes through the power connection area 235 and extends to the edge of the substrate 230; the first end of the second electric heating body 220 is connected to the second end of the first electric heating body 210, and the second end of the second electric heating body 220 is bent around the first heating area 232 and extends to the edge of the substrate 230, and the second electric heating body 220 is bent near the power connection area 235; and the power supply access point 240 of the first electric heating body 210 and the second electric heating body 220 is located at the first end of the first electric heating body 210 and the second end of the second electric heating body 220.

[0091] It can be understood that the first electric heating body 210 and the second electric heating body 220 are an integrated structure, and the first electric heating body 210 and the second electric heating body 220 have a shared power supply access point 240, that is, the heating mechanism 200 of this embodiment can use a single-loop single-control electric control form and adopt different wiring densities (or the width, thickness, and overall length of the first electric heating body 210 / the second electric heating body 220 mentioned in the above embodiment) to control the power ratio of the first electric heating body 210 and the second electric heating body 220 in an integrated manner to ensure that the food in each area is heated evenly.

[0092] Furthermore, the provision of the power connection area 235 allows the first and second electric heating elements 210, 220 to be connected to one another as a whole, thus preventing interference between the first and second electric heating elements 210, 220. Furthermore, by extending the first electric heating element 210 along the edge of the first heating zone 232, the blank area 234 described in the above embodiment can be formed. Furthermore, the overall arrangement of the first and second electric heating elements 210, 220 in this embodiment, along with the rational planning and layout and area utilization, ensures the performance of the heating mechanism 200.

[0093] In addition, the operating temperature of the portion of the first electric heating body 210 arranged in the power connection area 235 (or in the second heating area 233) is greater than the temperature of the portion of the first electric heating body 210 arranged in the first heating area 232, and the operating temperature of the portion of the first electric heating body 210 arranged in the power connection area 235 (or in the second heating area 233) can be configured to be the same as the operating temperature of the second electric heating body 220, so as to cause the temperature at various locations in the second heating area 233 to be greater than the temperature at various locations in the first heating area 232 when the first electric heating body 210 and the second electric heating body 220 are powered on.

[0094] At this point, those skilled in the art will recognize that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications consistent with the principles of the present invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

1. An oven, comprising: a box body, in which a cooking cavity is provided; At least one heating mechanism is provided at the top and / or bottom of the cooking cavity, each of the heating mechanisms comprising: a first electric heating element arranged along a predetermined heating surface, wherein the predetermined heating surface is arranged toward the cooking cavity; The second electric heating element is arranged along the preset heating surface and around the first electric heating element. The operating temperature of the second electric heating element is greater than the operating temperature of the first electric heating element.

2. The oven according to claim 1, wherein The ratio of the heat power of the first electric heating element to the heat power of the second electric heating element is in a range of 1 / 9 to 3 / 17; and The second electric heating element is arranged on the preset heating surface and surrounds a first heating zone, and the second electric heating element occupies a second heating zone on the preset heating surface, the second heating zone is located around the first heating zone, the first electric heating element is arranged in the first heating zone, and the area ratio of the first heating zone to the second heating zone ranges from 1 / 3 to 7 / 13.

3. The oven according to claim 2, wherein: The ratio of the area of ​​the first heating zone to the area of ​​the preset heating surface is in the range of 25% to 35%; and The area ratio of the second heating zone to the preset heating surface is in a range of 65% to 75%.

4. The oven according to claim 2, wherein: A blank area is provided in the middle of the first heating area, and the first electric heating element is arranged around the blank area.

5. The oven according to claim 2, wherein: Each of the heating mechanisms further comprises: The base plate is arranged in the box body, and the surface thereof facing the cooking cavity is the preset heating surface.

6. The oven according to claim 5, wherein: The material of the substrate includes at least one of microcrystalline glass, quartz glass, mica, ceramics and stainless steel.

7. The oven according to claim 5, wherein: The first electric heating element and the second electric heating element are arranged on the substrate by thick film heating technology; or, The first electric heating element and the second electric heating element are arranged on the substrate through a graphene high-temperature coating.

8. The oven according to claim 5, wherein: The first electric heating element and the second electric heating element are both in strip shape; and The first electric heating element is bent and wound around the first heating zone for at least one circle, and the second electric heating element is bent and wound around the first heating zone for at least two circles in the second heating zone.

9. The oven according to claim 8, wherein: The first electric heating element and the second electric heating element have independent power supply access points.

10. The oven according to claim 9, wherein: A power supply connection area extending from the second heating area to the edge of the substrate is further provided in the second heating area; and The first electric heating element is extended and wound along the edge of the first heating area, and two ends of the first electric heating element pass through the power supply connection area and extend to the edge of the substrate; The second electric heating element is arranged in a curved manner around the first heating area in the second heating area, and the second electric heating element is bent near the power connection area, and both ends of the second electric heating element are close to the power connection area or extend to the edge of the substrate in the power connection area; and The power supply access point of the first electric heating element is located at its end, and the power supply access point of the second electric heating element is located at its end.

11. The oven according to claim 8, wherein A power supply connection area extending from the second heating area to the edge of the substrate is further provided in the second heating area; and The first electric heating element is connected to the second electric heating element, and the first electric heating element and the second electric heating element are an integrated structure, and the first electric heating element and the second electric heating element have a shared power supply access point; and, The first electric heater is bent and wound along the edge of the first heating area, and the first end of the first electric heater passes through the power supply connection area and extends to the edge of the substrate; The first end of the second electric heating element is connected to the second end of the first electric heating element, the second end of the second electric heating element is bent around the first heating area and extends to the edge of the substrate, and the second electric heating element is bent near the power supply connection area; and The power supply access points of the first electric heating element and the second electric heating element are located at a first end of the first electric heating element and a second end of the second electric heating element.

12. The oven according to claim 1, wherein The heating mechanism is also arranged on the side of the cooking cavity.

Images