A grill plate and grill

Abstract

The utility model belongs to the technical field of cooking utensil, specifically disclose a baking tray and oven. The baking tray includes the disc body and thick film circuit, the disc body has a plurality of heating areas, the disc body back side in each heating area all is provided with thick film circuit, each thick film circuit all includes a plurality of heating circuits, each heating circuit all includes a plurality of heating devices that set up in series, and the heat radiation area of all heating devices of each heating circuit covers corresponding heating area. The utility model can improve the flexibility of oven and baking tray to food cooking, improve the use experience of oven.

Description

Technical Field

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

[0002] An oven is a device used to bake food. It is widely used in home or outdoor baking scenarios. Ovens can be divided into electric ovens and gas ovens, depending on their heat source.

[0003] Conventional electric ovens use electric heating elements to heat food on a baking tray. To reduce the size of electric ovens, existing technology provides an electric grill pan, which includes a base and a baking tray set on the base. The bottom surface of the baking tray is coated with a thick film circuit, and a main control circuit is set inside the base. The baking tray and the base are detachably connected by an electrical connector, and the main controller is electrically connected to the thick film circuit through the electrical connector.

[0004] Existing electric griddles utilize a thick-film circuit on the bottom surface as a heat source, enabling a thinner and lighter overall design that reduces space requirements. The detachable connection between the griddle and base also facilitates cleaning. However, the power of these griddles is typically difficult to adjust, resulting in limited flexibility and a poor user experience. Utility Model Content

[0005] One of the technical problems solved by this utility model is to provide a baking pan that can effectively solve the problem of difficulty in adjusting the power of existing baking pans and improve the flexibility of use of the baking pan.

[0006] The second technical problem solved by this utility model is to provide an oven that can effectively solve the problem of difficult adjustment of heating power in existing ovens and improve the flexibility of oven use.

[0007] The first technical problem mentioned above is solved by the following technical solution:

[0008] A baking pan includes a pan body and a thick film circuit. The pan body has several heating zones. The thick film circuit is disposed on the back side of the pan body for each heating zone. Each thick film circuit includes multiple heating circuits. Each heating circuit includes multiple heating devices arranged in series. The heat radiation area of ​​all the heating devices in each heating circuit covers the corresponding heating zone.

[0009] Compared with the prior art, the baking pan of this utility model has the following advantages: By setting multiple heating circuits in the thick film circuit of each heating zone, it is easy to achieve individual control of each heating circuit. Thus, the heating power of each thick film circuit can be adjusted by controlling the on and off of each heating circuit, thereby adjusting the heating power according to the user's cooking needs, improving the user's cooking flexibility and enhancing the cooking experience; by setting the thick film circuit for heating, it is beneficial to set multiple discrete heating devices to improve the heating uniformity of the food-bearing surface; at the same time, using a thick film circuit as the thick film circuit can reduce the footprint of the thick film circuit, improve the overall structural compactness of the baking pan, and reduce the size and weight of the baking pan.

[0010] In one embodiment, each of the heating circuits is bent in a serpentine arrangement, and all the heating circuits are staggered.

[0011] In one embodiment, each heating circuit includes a plurality of heating groups arranged side by side and in series along a first direction, and each heating group includes a plurality of heating devices arranged in series in a U-shape. The heating groups of all heating circuits in the same heating zone are arranged one-to-one, and the U-shaped openings of all heating groups in the same heating zone face the same direction. The heating groups are arranged with inner and outer gaps.

[0012] In one embodiment, each heating group includes two heating units that are arranged opposite to and spaced apart in the first direction, and each heating unit includes a plurality of heating devices arranged in series in the second direction. The heating devices of adjacent heating units in two adjacent heating groups are staggered in the second direction, and the first direction is perpendicular to the second direction.

[0013] In one embodiment, two heating zones are arranged side by side along the length of the disc body, the first direction being the width direction of the disc body, and the U-shaped opening facing the other heating zone.

[0014] In one embodiment, at least some of the heating circuits in the same heating zone have different rated heating powers.

[0015] In one embodiment, two heating zones are arranged side by side along the length of the pan body. The baking pan also includes a first electrical connector, which is installed on the back side of the pan body and located between the two heating zones. All heating circuits are electrically connected to the first electrical connector.

[0016] In one embodiment, the first electrical connector includes a neutral wire pin and a plurality of live wire pins. The live wire pins are configured to correspond one-to-one with the heating circuits. The first end of each heating circuit is electrically connected to the corresponding live wire pin, and the second end of each heating circuit is electrically connected to the neutral wire pin.

[0017] In one embodiment, the first electrical connector further includes a thermostat, which is configured to correspond one-to-one with the heating zone. The rated heating power of the heating circuits in the same heating zone is different, and the thermostat is connected in series to the connection circuit between the heating circuit with the largest rated heating power in the same heating zone and the first electrical connector.

[0018] The second technical problem mentioned above is solved by the following technical solution:

[0019] An oven includes an oven base and a baking tray as described above. The oven base is equipped with a power control unit for independently supplying power to each heating circuit.

[0020] Compared with the prior art, the oven described in this utility model has the following advantages: by adopting the above-mentioned oven, the cooking flexibility of the oven can be improved and the user experience of the oven can be enhanced. Attached Figure Description

[0021] Figure 1 A schematic diagram of the oven structure is provided for an embodiment of this utility model;

[0022] Figure 2 This is a schematic diagram of the oven structure after the oven lid has been removed, according to an embodiment of the present utility model.

[0023] Figure 3 A schematic diagram of the disassembled structure of the oven after removing the oven lid, provided for the implementation of this utility model;

[0024] Figure 4 A bottom view of the baking tray provided in this embodiment of the present invention after the heat insulation cover has been removed;

[0025] Figure 5 for Figure 4 A magnified view of a section at point I;

[0026] Figure 6 A schematic diagram of the electrical connection between the first electrical connector and the thick-film circuit provided in an embodiment of this utility model;

[0027] Figure 7 A cross-sectional view of the baking pan provided in an embodiment of this utility model;

[0028] Figure 8 for Figure 7 A magnified view of a section at point J.

[0029] Label Explanation:

[0030] 1. Disc body; 11. Support plate; 12. Surrounding edge; 13. Flanged edge; 14. Folded edge; 15. Rib;

[0031] 2. Thick film circuit; 21. Heating circuit; 21a. First heating circuit; 21b. Second heating circuit; 21c. Third heating circuit; 21d. Fourth heating circuit; 21e. Fifth heating circuit; 21f. Sixth heating circuit; 211. Heating device; 212. Conductive component;

[0032] 3. Heat insulation cover; 31. Base plate; 32. Side plate; 33. Connecting edge; 34. Mounting boss;

[0033] 4. First electrical connector; 41. Live wire pin; 42. Neutral wire pin; 43. Ground wire pin; 44. Thermostat;

[0034] 5. Second electrical connection;

[0035] 6. Furnace base; 61. Placement groove; 62. Guide groove; 7. Furnace cover. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0038] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] This embodiment provides an oven that can bake food while increasing the user's flexibility in food cooking and improving the user experience.

[0041] like Figures 1 to 3 As shown, the oven includes a base 6, a baking tray, and a control module. The baking tray is detachably mounted on the upper side of the base 6 and has a food-bearing surface for holding food. An electric heating structure is installed inside the baking tray to heat the food-bearing surface, thereby heating the food on it. The control module is installed inside the base 6 and includes a power control unit. The power control unit supplies power to the electric heating structure, and the control module controls the operation of the oven.

[0042] A hinge seat is provided on the rear side of the oven base 6. The oven also includes an oven lid 7, which is hinged to the oven base 6 via the hinge seat. This allows the oven lid 7 to rotate and snap onto the upper end of the oven base 6 to form a cooking cavity, facilitating steaming and other cooking operations. The oven lid 7 can also be flipped open relative to the oven base 6 to expose a baking pan for grilling and other cooking operations. The specific structure of the oven lid 7 and its connection to the oven can be referenced from existing technologies, which are not the focus of this utility model and will not be elaborated upon here.

[0043] To improve the ease of setting the baking tray on the oven base 6, the upper end of the oven base 6 is recessed downwards to form a placement groove 61, in which the lower part of the baking tray is accommodated. Thus, the placement groove 61 enables the baking tray to be positioned and installed on the oven base 6. The shape of the placement groove 61 is adapted to the shape of the baking tray to ensure the stability of the baking tray within the placement groove 61.

[0044] To further improve the stability of the baking tray on the oven base 6, mounting bosses 34 are provided on the baking tray, protruding downwards. At least two mounting bosses 34 are spaced apart. Guide grooves 62 are provided on the oven base 6, corresponding one-to-one with the mounting bosses 34. The mounting bosses 34 are inserted into the guide grooves 62 to further guide the baking tray during installation. One mounting boss 34 is provided at each of the four corners of the baking tray to ensure guiding stability and reliability.

[0045] The baking pan includes a pan body 1 and a thick-film circuit 2. The upper side of the pan body 1 has a food-bearing surface. The pan body 1 has several heating zones. A thick-film circuit 2 is provided on the back side of each heating zone. Each thick-film circuit 2 includes multiple heating circuits 21. Each heating circuit 21 includes multiple heating elements 211 arranged in series. The heat radiation area of ​​all heating elements 211 in each heating circuit 21 covers the corresponding heating zone. The power control unit can independently supply power to each heating circuit 21.

[0046] The baking pan provided in this embodiment has multiple heating circuits 21 set in the thick film circuit 2 of each heating zone, which facilitates individual control of each heating circuit 21. Thus, the heating power of each thick film circuit 2 can be adjusted by controlling the on and off of each heating circuit 21, thereby adjusting the heating power according to the user's cooking needs, improving the user's cooking flexibility and enhancing the cooking experience. By setting the thick film circuit 2 for heating, it is beneficial to set multiple discrete heating devices 211 to improve the heating uniformity of the food-bearing surface. At the same time, using the thick film circuit 2 as the thick film circuit 2 can reduce the footprint of the thick film circuit 2, improve the overall structural compactness of the baking pan, and reduce the size and weight of the baking pan.

[0047] The baking tray also includes a heat insulation cover 3, which is installed on the back side of the tray body 1. The thick-film circuit 2 is located between the tray body 1 and the heat insulation cover 3. By setting the heat insulation cover 3 at the bottom of the tray body 1, and placing the thick-film circuit 2 between the heat insulation cover 3 and the tray body 1, water, oil, or other impurities are prevented from acting on the thick-film circuit 2, thus protecting the thick-film circuit 2, improving its reliability, and facilitating the cleaning and maintenance of the baking tray. At the same time, the heat insulation cover 3 also provides better support for the tray body 1, improving the overall structural strength and rigidity of the baking tray, reducing the probability of the baking tray deforming due to heat, and reducing the conduction of heat generated by the electric heating structure to the stove base 6, avoiding the risk of heat accumulation at the stove base 6 and causing burns to users, and improving the convenience for users to take out and put away the baking tray.

[0048] The mounting boss 34 protrudes from the heat insulation cover 3. Furthermore, the mounting boss 34 is formed by pressing the bottom of the heat insulation cover 3 downwards to reduce the processing difficulty and improve the overall structural strength and rigidity of the heat insulation cover 3.

[0049] like Figure 3 and Figure 4As shown, to facilitate the connection between the thick-film circuit 2 and the control module, the baking tray also includes a first electrical connector 4. The first electrical connector 4 is installed on the back side of the tray body 1 and extends through the heat insulation cover 3. Both terminals of all heating circuits 21 are electrically connected to the first electrical connector 4. A second electrical connector 5 is provided on the oven base 6. The first electrical connector 4 and the second electrical connector 5 are detachably electrically connected, and the second electrical connector 5 is electrically connected to the control module. By making the first electrical connector 4 and the second electrical connector 5 detachably electrically connected, it is convenient to clean and store the baking tray; at the same time, since all heating circuits 21 are electrically connected to the first electrical connector 4, the number of first electrical connectors 4 can be reduced, improving the structural compactness of the baking tray. In other embodiments, the first electrical connector 4 can also be arranged one-to-one with the heating zone.

[0050] In one embodiment, the first electrical connector 4 is fastened to the heat insulation cover 3, so that the first electrical connector 4, the heat insulation cover 3 and the pan body 1 can be connected to each other to form an overall structure with stronger structural stability. While ensuring the stability and reliability of the first electrical connector 4, it is also convenient to detachably connect the part of the first electrical connector 4 extending out of the heat insulation cover 3 to the second electrical connector 5, thereby improving the overall disassembly and assembly performance of the baking pan. It can also effectively prevent the disassembly and assembly of the first electrical connector 4 and the second electrical connector 5 from affecting the structural stability of the installation location of the first electrical connector 4, and improve the reliability of the baking pan.

[0051] In one embodiment, the first electrical connector 4 and the second electrical connector 5 are plugged in and out, that is, the first electrical connector 4 is a male connector and the second electrical connector 5 is a female connector. The male connector and the female connector are plugged in and out to improve the convenience of disassembly and assembly and the stability after connection, thereby ensuring the stability and reliability of information transmission.

[0052] The lower end of the mounting boss 34 is lower than or flush with the lower end of the first electrical connector 4, so that when the baking tray is assembled onto the oven base 6, the mounting boss 34 first engages with the guide groove 62 to guide the installation of the baking tray, thereby providing guidance for the plugging and unplugging connection of the first electrical connector 4 and the second electrical connector 5, ensuring the installation reliability of the first electrical connector 4 and the second electrical connector 5, and improving assembly efficiency.

[0053] In one embodiment, the thick-film circuit 2 is attached to the back of the pan body 1 and spaced apart from the heat insulation cover 3. The close attachment of the thick-film circuit 2 to the pan body 1 shortens the distance between them, thereby enhancing the heat conduction from the thick-film circuit 2 to the pan body 1 and improving the heating efficiency of the food. Furthermore, the spaced arrangement between the thick-film circuit 2 and the heat insulation cover 3 creates a heat-insulating cavity, which helps reduce the transfer of heat generated by the thick-film circuit 2 to the heat insulation cover 3, thus reducing downward radiation of heat from the thick-film circuit 2, reducing heat loss, and lowering the temperature of the heat insulation cover 3, improving the ease of use of the baking pan.

[0054] The thick-film circuit 2 includes multiple layers of first insulating layers, a heating circuit 21, and at least one second insulating layer sequentially laid on the back side of the pan body 1. The heating circuit 21 is located between the first and second insulating layers. The first insulating layer is disposed between the heating circuit 21 and the pan body 1 to prevent leakage of current from the heating circuit 21, which could cause the pan body 1 to become electrified. The second insulating layer can prevent leakage of current from the heating circuit 21, which could cause the heat insulation cover 3 to become electrified, thus improving the safety of the baking pan. The total thickness of the first insulating layer is greater than the total thickness of the second insulating layer.

[0055] Because the distance between the heating circuit 21 and the pan body 1 is small, the risk of electrical breakdown is relatively high. Therefore, multiple layers of first insulation are needed between the heating circuit 21 and the pan body 1 to increase the thickness of the insulation structure between them. This reduces the probability of electrical breakdown of the heating element 211 along the side facing the pan body 1, lowers the probability of leakage from the pan body 1, and ensures the safety of the baking pan. Since the heating circuit 21 is relatively close to the pan body 1 and relatively far from the heat insulation cover 3, the thickness of the second insulation layer is set to be less than that of the first insulation layer. This avoids electrical breakdown of the thick-film circuit 2 downwards while reducing the cost of the thick-film circuit 2.

[0056] However, it is understandable that the thickness of the first insulating layer and the second insulating layer can be specifically set according to the electrical breakdown parameters of the thick film circuit 2. In one embodiment, the first insulating layer of all thick film circuits 2 is integrally formed, and the second insulating layer of all thick film circuits 2 is integrally formed, so as to reduce the difficulty of setting the first insulating layer and the second insulating layer and improve the ease of laying the thick film circuit 2 on the back side of the disk body 1.

[0057] The thick film circuit 2 is disposed on the bottom of the disk body 1 by sintering. The forming method of the thick film circuit 2 can be specifically set with reference to the existing technology. This embodiment does not limit or elaborate on this.

[0058] To improve the heating effect of the thick film circuit 2 on the food-bearing surface, a heat-reflective layer is provided on the side of the heat insulation cover 3 facing the thick film circuit 2. Since the heat generated by the thick film circuit 2 radiates upwards and downwards, by providing a heat-reflective layer, the heat energy radiated to the heat insulation cover 3 can be reflected in the direction towards the plate 1, preventing the heat insulation cover 3 from heating up. At the same time, it can also improve the heating effect of the thick film circuit 2 on the plate 1 and improve the heat energy utilization rate.

[0059] In other embodiments, a heat insulation structure is also provided in the heat insulation cavity. The heat insulation structure is used to further reduce the conduction of heat from the thick film circuit 2 to the heat insulation cover 3. The heat insulation structure may be, but is not limited to, heat insulation cotton, heat insulation coating or other structures that can reduce heat conduction.

[0060] The spacing between the thick-film circuit 2 and the heat insulation cover 3 is preferably 0.8mm to 2mm to ensure heat insulation while reducing the overall thickness of the baking pan and improving the user experience. The spacing between the thick-film circuit 2 and the heat insulation cover 3 can be, but is not limited to, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.8mm, and 2mm. It is understood that the spacing between the heating structure and the heat insulation cover 3 can be specifically limited according to the power of the heating structure.

[0061] To improve the ease of use of the baking pan and oven, in one embodiment, at least two heating zones are provided. The power control unit can supply power to the heating circuits 21 of different heating zones separately, thereby facilitating individual control of each heating circuit 21. This allows for individual heating of each zone, enabling zoned cooking, enhancing the cooking experience, and reducing energy consumption and costs when a large heating zone is not needed. Simultaneously, this arrangement reduces the coverage area of ​​a single heating circuit 21, lowering the processing cost and difficulty of the heating circuit 21. In other embodiments, only one heating zone may be provided.

[0062] In one embodiment, the plate body 1 has two heating zones arranged side by side along its length, and two heating circuits 21 are arranged side by side in the left-right direction, that is, each heating circuit 21 heats the corresponding heating zone. In other embodiments, three heating zones can be arranged in the left-right direction, or four heating circuits 21 can be arranged in a rectangular pattern. The number of heating zones and the number and arrangement of heating circuits 21 in each heating zone can be adapted to local cooking habits.

[0063] In one embodiment, the first electrical connector 4 is located between the two heating zones, thereby facilitating the connection between the heating circuits 21 of the two heating zones and the first electrical connector 4, improving the wiring convenience between the heating circuits 21 of the two heating zones and the first electrical connector 4. Since the first electrical connector 4 has a certain size, the heating device 211 cannot be arranged within the area where the first electric heating element is located, resulting in a slightly cooler heating zone on the upper side of the plate 1 corresponding to the position of the first electric heating element. By placing the first electrical connector between the two heating zones, the heating zone formed at the location corresponding to the first electrical connector 4 is dispersed between the two heating zones, thereby reducing the range of the heating zone corresponding to a single heating zone. This allows for better utilization of the heating zone when using a single heating zone for heating. Furthermore, to improve the heating and cooling process, the heating power of the heating device 211 located near the first electrical connector 4 does not need to be large, thus avoiding localized high temperatures and improving heating uniformity.

[0064] In one embodiment, at least some of the heating circuits 21 in the same heating zone have different rated heating powers, thereby increasing the range of power adjustment. That is, the power can be adjusted not only by the number of heating circuits 21 that are turned on, but also by selecting the rated heating power of the activated heating circuits 21, resulting in better adjustment flexibility. Preferably, each heating circuit 21 in the same heating zone has a different rated heating power to maximize the adjustment flexibility of heating power while keeping the number of heating circuits 21 constant. In other embodiments, the rated heating power of the heating circuits 21 in the same heating zone may be the same; in this case, the power of the heating zone can be adjusted only by controlling the number of heating circuits 21 that are turned on.

[0065] To improve the ease of arranging multiple heating circuits 21 in the same heating zone, in one embodiment, each heating circuit 21 is bent into a serpentine arrangement, and all heating circuits 21 are staggered. By bending the heating circuits 21 into a serpentine arrangement, it is beneficial to ensure the number of heating devices 211 and the coverage of the heating circuits 21 while keeping the heating zone area constant, thereby improving the rationality of the layout of the heating devices and avoiding the problem of a large heating power requirement for a single heating device 211 due to a small number of heating devices 211. At the same time, the serpentine arrangement also makes the arrangement method more compatible with the shape of the heating zone.

[0066] In other embodiments, all heating circuits 21 are arranged in a spiral shape, and all heating circuits 21 in the same heating zone are nested in layers.

[0067] In one embodiment, each heating circuit 21 includes multiple heating groups arranged in series along a first direction. Each heating group includes multiple heating devices 211 arranged in series in a U-shape. The U-shaped openings of all heating groups in the same heating area face the same direction. The heating groups of all heating circuits 21 in the same heating area are arranged one-to-one, and the corresponding heating groups are spaced apart from the inside to the outside. This arrangement allows individual heating circuits 21 to be connected to form a serpentine structure, which facilitates the coverage of individual heating circuits 21 in the heating area and ensures that the heating area is heated evenly when a single heating circuit 21 is turned on. At the same time, the corresponding heating groups of multiple heating circuits 21 are arranged in series from the inside to the outside, which can avoid problems such as entanglement between different heating circuits 21, improve the local regularity of the heating circuits 21, and facilitate the formation of the heating circuits 21 on the plate 1.

[0068] Each heating group includes two heating units arranged opposite to each other and spaced apart in a first direction. Each heating unit includes multiple heating elements 211 arranged in series in a second direction. The heating elements 211 of adjacent heating units in two adjacent groups are staggered in the second direction. This reduces the overlap of the heat radiation range of two adjacent heating elements 211, ensures that multiple heating elements 211 cover different areas, and improves the uniformity of heating temperature throughout the heating zone.

[0069] Among the multiple heating groups, at least the two heating units of the outer heating group are connected in series with a heating device 211, that is, the bottom of the U-shaped heating group is provided with a heating device 211 to avoid local low temperature areas at the edge of the plate 1 and further improve the heating uniformity of the heating area.

[0070] It should be noted that the heating power of each heating element 211 can be set according to the heating area to be covered. In the same heating group, the power of the heating element 211 located between two heating units can be greater than the power of the heating element 211 in the heating unit, so as to increase the heat radiation area of ​​the heating element 211 between the heating units. The power of the heating elements 211 in the same heating unit can be the same, or the power of the heating element 211 near the bottom of the U-shaped structure in the same heating unit can be greater than the power of the heating elements 211 in other positions.

[0071] In one embodiment, the first direction is the width direction of the disk body 1, and the second direction is the length direction of the disk body 1. This arrangement facilitates the selection of the number of heating devices 211 in each heating group based on the different lengths of the disk body 1 in the width direction, thereby achieving full coverage of the back side of the heating area by the thick-film circuit 2. In other embodiments, the first direction is the length direction of the disk body 1, and the second direction is the width direction of the disk body 1. The opening of each heating group faces the middle of the disk body 1 to reduce the length of a single heating group. In other embodiments, the first direction may also be the length direction of the disk body 1.

[0072] For example, there are two heating zones, namely a first heating zone and a second heating zone. Each heating zone is provided with three heating circuits 21. The three heating circuits 21 in the first heating zone are a first heating circuit 21a, a second heating circuit 21b, and a third heating circuit 21c. The three heating circuits 21 in the second heating zone are a fourth heating circuit 21d, a fifth heating circuit 21e, and a sixth heating circuit 21f. Each heating group includes multiple heating devices 211 arranged in series using conductive elements 212.

[0073] The first heating circuit 21a includes multiple U-shaped heating groups. The heating groups of the second heating circuit 21b are all located inside the corresponding heating groups of the first heating circuit 21a. The heating groups of the third heating circuit 21c are all located inside the heating groups of the second heating circuit 21b. This ensures that the arrangement of each heating circuit 21 will not affect the series connection of multiple heating groups of other heating circuits 21.

[0074] The arrangement of the multiple heating circuits 21 in the second heating zone is consistent with the arrangement of the multiple heating circuits 21 in the first heating zone.

[0075] The first electrical connector 4 is located between the two heating zones. Each heating circuit 21 has two terminals, and the heating terminals of the two heating circuits 21 are connected to the first electrical connector 4.

[0076] like Figure 6 As shown, to ensure the connection between the heating circuit 21 and the first electrical connector 4, in one embodiment, the first electrical connector 4 includes a neutral wire pin 42 and multiple live wire pins 41. Each live wire pin 41 corresponds to one heating circuit 21. The first end of each heating circuit 21 is electrically connected to its corresponding live wire pin 41, and the second end of each heating circuit 21 is electrically connected to the neutral wire pin 42. This allows for the independent control of multiple heating circuits 21 while sharing the neutral wire pin 42, reducing the number of neutral wire pins 42 and thus reducing the size and footprint of the first electrical connector 4.

[0077] In other embodiments, the first electrical connector 4 may be provided with multiple pin groups, each pin group corresponding to a heating circuit 21. Each pin group includes a neutral pin 42 and a live pin 41, and the two terminals of each heating circuit 21 are electrically connected to the live pin 41 and the neutral pin 42, respectively.

[0078] The first electrical connector 4 also includes a ground pin 43, which is configured to correspond one-to-one with the thick film circuit 2. The two ground pins 43 are grounded to improve the safety of the first electrical connector 4 and the thick film circuit 2.

[0079] To improve the safety of the thick-film circuit 2, in one embodiment, the first electrical connector 4 further includes a temperature controller 44. The temperature controller 44 is configured to correspond one-to-one with each heating zone. The temperature controller 44 is connected in series with the connection circuit between the heating circuit 21 with the highest rated heating power in the same heating zone and the first electrical connector 4. This reduces the number of temperature controllers 44 while minimizing excessive temperature rise in the baking pan, thereby improving the safety and reliability of the baking pan. Specifically, the temperature controller 44 is connected in series with the terminal of the heating circuit 21 with the highest power and the connection circuit of the neutral wire pin 42d.

[0080] like Figure 7 and Figure 8 As shown, in one embodiment, the plate body 1 includes a support plate portion 11, with an edge portion 12 formed around the edge of the support plate portion 11. The upper side surface of the support plate portion 11 forms a food-bearing surface. The edge portion 12 prevents food from falling out of the support plate portion 11 and avoids oil from flowing out along the edge of the support plate portion 11 during cooking. A thick-film circuit 2 is disposed on the lower side surface of the support plate portion 11. The support plate portion 11 has two first sides arranged opposite to each other in the width direction and two second sides arranged opposite to each other in the length direction. The two first sides are parallel and spaced apart, and the two second sides have an arc-shaped structure. This increases the maximum width of the support plate portion 11, increases the amount of food it can bear, and also helps to reduce the overall structural size of the oven while ensuring the amount of food it can bear.

[0081] The support plate portion 11 is stamped with multiple raised ribs 15 from bottom to top. The raised ribs 15 can enhance the overall structural strength and rigidity of the pan body 1, reduce the probability of the pan body 1 deforming due to heat, improve the reliability of the baking pan, and help ensure the connection stability and reliability of the first electrical connector 4 and the second electrical connector 5. At the same time, the setting of the raised ribs 15 can reduce the probability of food sticking to the pan body 1, and improve the cooking experience. In one embodiment, multiple sets of raised ribs 15 are arranged at intervals along the length direction of the pan body 1, and each set includes multiple raised ribs 15 arranged at intervals along the width direction of the pan body 1, with the raised ribs 15 extending along the length direction of the pan body 1.

[0082] In the width direction of the rib portion 15, the height of the rib portion 15 protruding from the support plate portion 11 gradually decreases from the middle to both sides of the rib portion 15. This facilitates the dripping of oil on the rib portion 15 down onto the support plate portion 11, thereby facilitating oil recovery and cleaning of the plate body 1. Simultaneously, this design reduces the probability of food adhering to the plate body 1, preventing food from burning. The cross-section of the rib portion 15 can be arc-shaped, triangular, or trapezoidal with a chamfered edge and a smaller top and larger bottom. The height of the rib portion 15 protruding from the support plate portion 11 is preferably 0.5mm to 2mm. The height of the rib portion 15 protruding from the support plate portion 11 can be, but is not limited to, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.8mm, 2mm, etc.

[0083] In one embodiment, the upper edge of the rim portion 12 is folded outward to form a folded edge portion 13, and the folded edge portion 13 is folded downward and inward to form a folded edge portion 14. The folded edge portion 13 and the folded edge portion 14 can enhance the structural strength and rigidity of the pan body 1 at the opening edge, reduce the probability of deformation of the pan body 1, and facilitate the user to pick up and put down the baking pan, thus improving the user experience of the baking pan.

[0084] The heat insulation cover 3 includes a base plate portion 31 and a side plate portion 32 connected to the periphery of the base plate portion 31. The edge of the side plate portion is folded outward to form a connecting edge portion 33. The base plate portion 31 is spaced apart from the thick film circuit 2, and the connecting edge portion 33 is attached to the support plate portion 11, thereby forming an installation cavity between the support plate portion 11 and the base plate portion 31. To better ensure sealing, the connecting edge portion 33 is welded to the support plate portion 11 of the disk body 1 to prevent water or oil stains from entering the sealed space through the gap between the heat insulation cover 3 and the disk body 1, and to prevent the heat generated by the thick film circuit 2 from leaking out through the gap.

[0085] Furthermore, the heat insulation cover 3 and the tray 1 are fully welded together to further improve the sealing of the connection between the two, facilitating the cleaning of the baking tray. The welding method can be laser welding or other welding methods. In other embodiments, the heat insulation cover 3 can be riveted to the tray 1 or connected with screws. Simultaneously, a sealing ring is provided at the connection point between the heat insulation cover 3 and the tray 1 to seal the connection.

[0086] In one embodiment, the included angle between the side plate portion 32 and the bottom plate portion 31 is an obtuse angle, thereby allowing the connecting edge portion 33 to be positioned close to the edge of the support plate portion 11 while the lower end of the heat insulation cover 3 tapers inward to reduce the overall footprint of the baking tray. The included angle between the side plate portion 32 and the bottom plate portion 31 is greater than 90° and less than 120°. The heat insulation cover 3 is made of high-temperature resistant materials such as stainless steel or ceramic.

[0087] In one embodiment, thermocouples are disposed on the disk body 1, with each thermocouple corresponding to a heating zone. The thermocouples are located within the setting area of ​​the thick-film circuit 2 and are offset from the heating circuit 21. The thermocouples are used to detect the temperature of the disk body 1, facilitating the control module's control of the thick-film circuit 2. The thermocouple terminals are electrically connected to the first electrical connector 4 to transmit the detection signal to the control module. By placing the thermocouples on the disk body 1, the reliability and stability of the contact between the thermocouples and the disk body 1 can be ensured, thereby improving the reliability, accuracy, and sensitivity of temperature measurement, and increasing the temperature measurement response speed. The thermocouples are offset from the heating device 211 and the conductive component 212.

[0088] To improve the stability of the thermocouple installation, the thermocouple is welded to the back of the disc 1 to ensure reliable contact between the thermocouple's sensing end and the disc 1, simplifying the thermocouple installation. Furthermore, a clearance hole is provided on the thick-film circuit 2, into which the thermocouple is installed to avoid interference between the thermocouple and the thick-film circuit 2. The clearance hole is filled with high-temperature sealant to prevent leakage and heat loss. The high-temperature sealant used is a readily available high-temperature resistant sealant; this invention does not limit the type of high-temperature sealant.

[0089] In one embodiment, each heating zone is provided with one thermocouple to reduce costs and simplify the connection between the thermocouple and the first electrical connector 4. The thermocouple is preferably located in the central region of the heating zone to improve detection accuracy. In other embodiments, each heating zone may be provided with two or more thermocouples.

[0090] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0091] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A baking pan, characterized in that, The device includes a disk body (1) and a thick film circuit (2). The disk body (1) has several heating zones. The thick film circuit (2) is provided on the back side of each heating zone. Each thick film circuit (2) includes multiple heating circuits (21). Each heating circuit (21) includes multiple heating devices (211) arranged in series. The heat radiation area of ​​all the heating devices (211) of each heating circuit (21) covers the corresponding heating zone.

2. The baking pan according to claim 1, characterized in that, Each of the heating circuits (21) is bent in a serpentine arrangement, and all the heating circuits (21) are staggered.

3. The baking pan according to claim 2, characterized in that, Each heating circuit (21) includes multiple heating groups arranged side by side and in series along a first direction. Each heating group includes multiple heating devices (211) arranged in series in a U-shape. The heating groups of all heating circuits (21) in the same heating zone are arranged one-to-one. The U-shaped openings of all heating groups in the same heating zone face the same direction, and the heating groups are arranged in a spaced-out manner.

4. The baking pan according to claim 3, characterized in that, Each heating group includes two heating units that are opposite to and spaced apart in the first direction. Each heating unit includes a plurality of heating devices (211) that are connected in series in the second direction. The heating devices (211) of two adjacent heating units in two adjacent heating groups are staggered in the second direction. The first direction is perpendicular to the second direction.

5. The baking pan according to claim 3, characterized in that, Two heating zones are arranged side by side along the length of the disc (1), the first direction being the width direction of the disc (1), and the U-shaped opening facing the other heating zone.

6. The baking pan according to any one of claims 1-5, characterized in that, In the same heating zone, at least some of the heating circuits (21) have different rated heating powers.

7. The baking pan according to any one of claims 1-5, characterized in that, The heating zone is arranged in two parallel rows along the length of the pan body (1). The baking pan also includes a first electrical connector (4), which is installed on the back side of the pan body (1) and located between the two heating zones. All heating circuits (21) are electrically connected to the first electrical connector (4).

8. The baking pan according to claim 7, characterized in that, The first electrical connector (4) includes a neutral wire pin (42) and multiple live wire pins (41). The live wire pins (41) are arranged in a one-to-one correspondence with the heating circuit (21). The first end of each heating circuit (21) is electrically connected to the corresponding live wire pin (41), and the second end of each heating circuit (21) is electrically connected to the neutral wire pin (42).

9. The baking pan according to claim 8, characterized in that, The first electrical connector (4) also includes a thermostat (44), which is configured one-to-one with the heating zone. The rated heating power of the heating circuit (21) in the same heating zone is different. The thermostat (44) is connected in series to the connection circuit between the heating circuit (21) with the largest rated heating power in the same heating zone and the first electrical connector (4).

10. An oven, comprising an oven base (6), characterized in that, Including the baking pan as described in any one of claims 1-9, the oven base (6) is provided with a power control unit for independently supplying power to each of the heating circuits (21).

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