Two-section heating device and IH electric cooker

Abstract

The utility model relates to the technical field of electric rice cookers, in particular to a two-section heating device and an IH electric rice cooker, the two-section heating device comprises a bottom heating structure, the bottom heating structure comprises a bottom coil panel and a bottom coil, and the bottom coil is wound on the bottom coil panel; the side heating structure comprises a hollow middle-layer bobbin and a side coil, and the middle-layer bobbin is detachably connected with the bottom coil panel, so that a bottom end opening of the middle-layer bobbin is connected with a top end opening of the bottom coil panel; the middle-layer bobbin is formed by detachably splicing a plurality of arc-shaped pieces, and the side coils are wound on the outer wall of the middle-layer bobbin. According to the utility model, rice at the bottom and the side part of the inner container of the IH electric cooker can be uniformly heated, so that the taste of the whole rice is kept consistent, and the problems that the heating effect of the existing heating device is poor, and the rice cannot be heated when the rice quantity is large are solved. The rice far away from the heating source is hard or half-cooked due to insufficient heating, so that the quality of the whole rice is reduced.

Description

Technical Field

[0001] This utility model relates to the field of rice cooker technology, and in particular to a two-stage heating device and an IH rice cooker. Background Technology

[0002] An IH (Induction Heating) rice cooker is a type of rice cooker that uses electromagnetic induction heating technology. It heats food by using a heating element with a coil at the bottom of the inner pot, which generates eddy currents within the pot, causing it to heat up. Compared to traditional bottom heating methods, IH heating reduces heat transfer steps and energy loss, resulting in higher thermal efficiency and saving energy and time. IH rice cookers are gradually becoming an indispensable cooking tool in modern kitchens.

[0003] Unlike household rice cookers, commercial rice cookers have a larger volume and capacity, with a deeper inner pot designed to cook more rice. Some commercial rice cookers have begun to use IH (induction heating) technology; however, the heating effect of existing devices is not ideal. When the amount of rice is large, the rice further away from the heating source may be undercooked or hard due to insufficient heating, while the rice closer to the heating source is fully heated and has a better texture. This difference in texture reduces the overall quality of the rice, thus affecting the consumer's eating experience. Utility Model Content

[0004] The main purpose of this invention is to provide a two-stage heating device that allows rice located at the bottom and sides of the inner pot of an IH rice cooker to be heated evenly, thus ensuring a consistent overall texture. This solves the problem of poor heating effect of existing heating devices, where rice further away from the heating source is undercooked or hard due to insufficient heating when the amount of rice is large, resulting in a decline in the overall quality of the rice.

[0005] Another objective of this invention is to provide an IH rice cooker that uses the aforementioned two-stage heating device. The bottom and sides of the inner pot of this IH rice cooker can heat the rice, and the rice in the IH rice cooker can be heated evenly. This solves the problem that when the amount of rice is large, the rice that is far from the heating source is not heated enough, resulting in a hard or undercooked texture and a decline in the overall quality of the rice.

[0006] To achieve the above objectives, the present invention proposes a two-stage heating device for use in an IH rice cooker, comprising:

[0007] A bottom heating structure, comprising a bottom coil disk and a bottom coil, wherein the bottom coil is wound around the bottom coil disk;

[0008] The side heating structure includes a hollow middle layer bobbin and a side coil. The middle layer bobbin is detachably connected to the bottom coil disc, such that the bottom opening of the middle layer bobbin is connected to the top opening of the bottom coil disc. The middle layer bobbin is detachably assembled from several arc-shaped parts, and the side coil is wound around the outer wall of the middle layer bobbin.

[0009] Optionally, each of the arc-shaped components has a plurality of first partitions on its outer wall, and the side coil is wound around the plurality of first partitions on the side opposite to the arc-shaped component.

[0010] Optionally, the number of the arc-shaped components is two, the arc-shaped components are semi-circular, each of the first partitions extends along the height direction of the arc-shaped component, and several first partitions are distributed at intervals on the sidewall of the arc-shaped component.

[0011] One of the first partitions is located at the centerline of the arc-shaped component, and the first partition located at the centerline of the arc-shaped component is perpendicular to the side wall of the arc-shaped component; the remaining first partitions are all arranged parallel to the first partition located at the centerline of the arc-shaped component.

[0012] Optionally, the outer wall of the arc-shaped component is provided with a plurality of protrusions, the plurality of protrusions are arranged at intervals along the height direction of the arc-shaped component, and each of the protrusions extends along the circumferential direction of the arc-shaped component, and the two ends of the first partition plate respectively abut against one of the protrusions.

[0013] Optionally, the number of protrusions is three, with one protrusion located at the middle position in the height direction of the arc-shaped component, and the other two protrusions located at the two side edges in the height direction of the arc-shaped component, respectively. The two ends of the plurality of first partitions respectively abut against the two protrusions located on the lower side.

[0014] Optionally, each of the arc-shaped components is further provided with a plurality of second partitions on its outer wall, the two ends of the plurality of second partitions respectively abutting against the two protrusions located on the upper side, and the plurality of second partitions are spaced apart on the side wall of the arc-shaped component;

[0015] One of the second partitions is located at the centerline of the arc-shaped component, and the second partition located at the centerline of the arc-shaped component is perpendicular to the side wall of the arc-shaped component; the remaining second partitions are all arranged parallel to the second partition located at the centerline of the arc-shaped component.

[0016] Optionally, the circumferential end of the arc-shaped component is provided with a splicing structure, the splicing structure including a first connector, a second connector and a screw; the first connector, the second connector and the screw are disposed on the same side of the outer wall of the arc-shaped component away from the side coil;

[0017] The first connector and the second connector are respectively disposed at both ends of the arc-shaped component in the circumferential direction. The screw passes through the first connector of one arc-shaped component and the second connector of the other arc-shaped component to splice the two arc-shaped components together.

[0018] Optionally, the splicing structure further includes a first slot, a second slot, a third slot, and a plurality of protrusions;

[0019] One end of the arc-shaped component in the circumferential direction is provided with the second connector, the first slot and the second slot, and the other end of the arc-shaped component in the circumferential direction is provided with the first connector, the third slot and a plurality of protrusions; the first slot, the second slot and the third slot are all extended along the height direction of the arc-shaped component;

[0020] In one of the arc-shaped components, the first slot is disposed on the side wall of the arc-shaped component away from the protrusion; the second connector, the second slot, the first connector, and the third slot are all disposed on the side wall of the arc-shaped component where the protrusion is located; a plurality of protrusions are disposed on the side of the third slot close to the protrusion, and the plurality of protrusions are arranged at intervals along the extension direction of the third slot.

[0021] The first slot of one of the arc-shaped components is engaged with the third slot of another arc-shaped component; the second slot of one arc-shaped component is engaged with a plurality of the protrusions of another arc-shaped component.

[0022] Optionally, the second slot is provided with a plurality of auxiliary blocks, and the plurality of auxiliary blocks are arranged at intervals along the extension direction of the second slot;

[0023] In one of the arc-shaped components, the number of auxiliary blocks is the same as the number of protrusions, and the auxiliary blocks and protrusions are staggered.

[0024] A plurality of the protrusions of one of the arc-shaped components abut against a plurality of the auxiliary blocks of another arc-shaped component.

[0025] This utility model also proposes an IH rice cooker, including any of the two heating devices described above.

[0026] Compared with the prior art, the embodiments of this utility model have the following beneficial effects:

[0027] In the bottom heating structure of this utility model, a bottom coil is wound around a bottom coil disc to heat the bottom of the inner pot of the IH rice cooker; by setting a side heating structure, a side coil is wound around the outer wall of the middle layer coil to heat the side of the inner pot of the IH rice cooker; by combining the bottom heating structure and the side heating structure, the rice located at the bottom and side of the inner pot of the IH rice cooker can be heated evenly, thereby achieving a consistent overall taste of the rice, improving the quality of the rice, and providing consumers with a better eating experience. The middle layer coil is composed of several detachable and spliced ​​arc-shaped parts. The spliced ​​structure of the middle layer coil can effectively reduce the mold size, reduce the complexity of the mold, and reduce the difficulty of warehouse management during actual production. In addition, by stacking several arc-shaped parts, transportation can be carried out conveniently without transporting the entire middle layer coil, effectively improving the flexibility and efficiency of transportation. Attached Figure Description

[0028] Figure 1 This is a front view of the bottom coil and the middle bobbin of a two-section heating device according to an embodiment of the present invention;

[0029] Figure 2 This is an exploded view of the bottom coil and the middle coil of a two-section heating device according to an embodiment of the present invention.

[0030] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0031] Figure 4 This is a schematic diagram of the bottom coil and the middle bobbin of a two-section heating device according to an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the structure of the arc-shaped component of a two-section heating device according to an embodiment of the present invention;

[0033] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0034] Figure 7 This is a schematic diagram of the arc-shaped component of a two-section heating device according to another embodiment of the present invention;

[0035] Figure 8 for Figure 7 A magnified view of point C in the middle.

[0036] The components include: 1. Bottom heating structure; 11. Bottom coil; 2. Side heating structure; 21. Middle layer coil; 211. Arc-shaped component; 2111. First partition; 2112. Protruding strip; 2113. Second partition; 2114. Splicing structure; 21141. First connector; 21141a. First through hole; 21142. Second connector; 21142a. Threaded hole; 21143. First slot; 21144. Second slot; 21145. Third slot; 21146. Protrusion; 21147. Auxiliary block. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; taking "A and / or B" as an example, it includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0041] This utility model proposes a two-stage heating device.

[0042] In the embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the two-stage heating device is applied to an IH rice cooker and includes: a bottom heating structure 1, which includes a bottom coil disk 11 and a bottom coil, with the bottom coil wound on the bottom coil disk 11;

[0043] The side heating structure 2 includes a hollow middle layer bobbin 21 and a side coil. The middle layer bobbin 21 is detachably connected to the bottom coil disc 11, so that the bottom opening of the middle layer bobbin 21 is connected to the top opening of the bottom coil disc 11. The middle layer bobbin 21 is detachably assembled from several arc-shaped parts 211, and the side coil is wound around the outer wall of the middle layer bobbin 21.

[0044] In the bottom heating structure 1 of this utility model, a bottom coil is wound around a bottom coil disc 11 to heat the bottom of the inner pot of the IH rice cooker; by setting a side heating structure 2, a side coil is wound around the outer wall of the middle layer coil 21 to heat the side of the inner pot of the IH rice cooker; by combining the bottom heating structure 1 and the side heating structure 2, the rice located at the bottom and side of the inner pot of the IH rice cooker can be heated evenly, thereby achieving a consistent overall rice texture, improving rice quality, and providing consumers with a better eating experience. The middle layer coil 21 is detachably assembled from several arc-shaped parts 211. The assembled structure of the middle layer coil 21 can effectively reduce the mold size, reduce the complexity of the mold, and reduce the difficulty of warehouse management during actual production. In addition, by stacking several arc-shaped parts 211, transportation can be carried out conveniently without transporting the entire middle layer coil 21, effectively improving the flexibility and efficiency of transportation. This invention solves the problem that existing heating devices have poor heating effects, and when the amount of rice is large, the rice far from the heating source is not heated enough, resulting in a hard or undercooked texture and a decline in the overall quality of the rice.

[0045] like Figure 1 and 2 As shown, in one embodiment of this application, each arc-shaped component 211 has a plurality of first partitions 2111 on its outer wall, and a side coil is wound around the plurality of first partitions 2111 on the side away from the arc-shaped component 211.

[0046] By setting several first partitions 2111 on the outer wall of the arc-shaped component 211, the side coil and the arc-shaped component 211 can be separated, which can adjust the distance between the side coil and the arc-shaped component 211. At this time, several air flow channels are constructed between the several first partitions 2111, the side coil and the arc-shaped component 211. These channels allow the heat generated by the side coil during operation to be smoothly exchanged with the external environment through air convection, achieving a high-efficiency heat dissipation effect and further extending the overall service life of this two-stage heating device.

[0047] To further explain, the side coil adopts a close-wound design, with the side coil tightly wound around several first partitions 2111, and the side coil is fixed to the middle coil spool 21 by using glue, ensuring the stability of the side coil and reducing the risk of displacement or falling off when the two heating devices are subjected to external forces (such as vibration or collision).

[0048] like Figure 1 , 2 As shown in Figure 4, in one embodiment of this application, the number of arc-shaped members 211 is two. The arc-shaped members 211 are semi-circular. Each first partition 2111 extends along the height direction of the arc-shaped member 211, and several first partitions 2111 are distributed at intervals on the sidewall of the arc-shaped member 211.

[0049] One of the first partition plates 2111 is located at the center line of the arc-shaped member 211, and the first partition plate 2111 located at the center line of the arc-shaped member 211 is perpendicular to the side wall of the arc-shaped member 211; the other first partition plates 2111 are all arranged parallel to the first partition plate 2111 located at the center line of the arc-shaped member 211.

[0050] Two arc-shaped components 211 are provided, and the two semi-circular arc-shaped components 211 can be detachably spliced ​​to form a middle layer bobbin 21. Several first partitions 2111 are provided extending along the height direction of the arc-shaped components 211. At this time, the side coil is wound around the outer wall of the entire middle layer bobbin 21 along the height direction of the arc-shaped components 211, which greatly improves the aesthetics of this utility model. The several first partitions 2111 distributed at intervals form several air flow channels with the side coil and the arc-shaped components 211, thereby avoiding the local accumulation of heat in the side coil and effectively dissipating the heat generated by the side coil, further improving the heat dissipation effect of this two-stage heating device. The first partition 2111, located at the centerline of the arc-shaped part 211, is vertically arranged on the side wall of the arc-shaped part 211. The other first partitions 2111 are all arranged parallel to the first partition 2111 located at the centerline of the arc-shaped part 211. With this arrangement, when the arc-shaped part 211 is produced using the corresponding mold, it is only necessary to apply an external force perpendicular to the centerline of the mold at the centerline of the mold to quickly separate the mold from the arc-shaped part 211, thereby improving the production efficiency of the arc-shaped part 211.

[0051] Preferably, a plurality of first partitions 2111 are evenly distributed on the sidewall of the arc-shaped component 211. The evenly distributed first partitions 2111 form a plurality of uniform airflow channels with the side coil and the arc-shaped component 211, which helps to evenly dissipate the heat generated by the side coil and further improve the heat dissipation effect.

[0052] like Figure 1 , 2 As shown in Figure 4, in one embodiment of this application, the outer wall of the arc-shaped member 211 is provided with a plurality of protrusions 2112, the plurality of protrusions 2112 are arranged at intervals along the height direction of the arc-shaped member 211, and each protrusion 2112 extends along the circumferential direction of the arc-shaped member 211, and the two ends of the first partition 2111 respectively abut against a protrusion 2112.

[0053] By setting a number of protrusions 2112 on the outer wall of the arc-shaped component 211, and each protrusion 2112 extending along the circumferential direction of the arc-shaped component 211, the overall structural strength of the arc-shaped component 211 can be improved. Furthermore, by abutting each end of the first partition 2111 with a protrusion 2112, the structural strength of the first partition 2111 can also be improved, further ensuring that the side coil can be stably wound on the side of the first partition 2111 away from the arc-shaped component 211. At this time, the height difference between the upper and lower ends of the first partition 2111 is the height difference between the two adjacent protrusions 2112, which is also the winding height of the side coil. Therefore, the winding height of the side coil can be designed and adjusted according to actual needs. That is, the height difference between the two adjacent protrusions 2112 can be determined according to the designed winding height of the side coil, and the side coil can be wound between the two protrusions 2112.

[0054] like Figure 1 As shown, in one embodiment of this application, the number of protrusions 2112 is three. One protrusion 2112 is located at the middle position in the height direction of the arc-shaped member 211, and the other two protrusions 2112 are respectively located at the two side edges in the height direction of the arc-shaped member 211. The two ends of several first partitions 2111 respectively abut against the two protrusions 2112 located on the lower side.

[0055] While increasing the winding height of the side coils can heat more rice, it is not always better to have them as high as possible. This is because different varieties of rice have different physical properties such as water absorption and expansion, which will affect the quality of the cooked rice. Therefore, when designing the winding height of the side coils, it is necessary to take into account the variety and physical properties of the rice. When one of the protrusions 2112 is positioned at the middle of the arc-shaped member 211 in the height direction, and the two ends of several first partitions 2111 respectively abut against the two protrusions 2112 located on the lower side, the side coil is wound around the lower side of the arc-shaped member 211, and the winding height of the side coil is close to half the height of the arc-shaped member 211. This allows the side coil to effectively heat the middle and lower parts of the side of the inner pot of the IH rice cooker. In other words, when the height of the rice contained in the inner pot of the IH rice cooker does not exceed the middle position of the inner pot, the use of this two-stage heating device can bring better heating effect to the rice, and the overall quality of the cooked rice is high, which can provide consumers with a better eating experience.

[0056] like Figure 1 and 2 As shown, in one embodiment of this application, the outer wall of each arc-shaped member 211 is further provided with a plurality of second partitions 2113, the two ends of the plurality of second partitions 2113 respectively abut against two protrusions 2112 located on the upper side, and the plurality of second partitions 2113 are distributed at intervals on the side wall of the arc-shaped member 211.

[0057] One of the second partitions 2113 is located at the center line of the arc-shaped member 211, and the second partition 2113 located at the center line of the arc-shaped member 211 is perpendicular to the side wall of the arc-shaped member 211; the other second partitions 2113 are all arranged parallel to the second partition 2113 located at the center line of the arc-shaped member 211.

[0058] By setting several second partitions 2113, the structural strength and stability of the arc-shaped component 211 can be improved, enabling it to effectively resist deformation that may be caused by external forces, further enhancing the overall structural strength of the middle layer bobbin 21, and extending the service life of this two-section heating device. The spaced second partitions 2113 also form a support between the two upper protrusions 2112, enabling the arc-shaped component 211 to effectively resist external forces and further improving its structural stability. A second partition 2113 is located at the centerline of the arc-shaped part 211 and is perpendicular to the side wall of the arc-shaped part 211. The remaining second partitions 2113 are parallel to the second partition 2113. The multiple second partitions 2113 adopt the same arrangement as the multiple first partitions 2111. Therefore, when the corresponding mold is used to produce the arc-shaped part 211, it is only necessary to apply an external force perpendicular to the centerline of the mold at the centerline of the mold to quickly separate the mold from the arc-shaped part 211, thereby improving the production efficiency of the arc-shaped part 211.

[0059] Preferably, the second partition 2113 is larger than the first partition 2111. Using a larger second partition 2113 can maximize the structural strength of the arc-shaped component 211.

[0060] In one embodiment of the present invention, the distance between two adjacent second partitions 2113 is greater than the distance between two adjacent first partitions 2111.

[0061] like Figures 1 to 3 As shown, in one embodiment of this application, the end of the arc-shaped member 211 in the circumferential direction is provided with a splicing structure 2114. The splicing structure 2114 includes a first connector 21141, a second connector 21142 and a screw; the first connector 21141, the second connector 21142 and the screw are disposed on the same side of the outer wall of the arc-shaped member 211 away from the side coil.

[0062] The first connector 21141 and the second connector 21142 are respectively disposed at both ends of the arc-shaped part 211 in the circumferential direction. The screw passes through the first connector 21141 of one arc-shaped part 211 and the second connector 21142 of the other arc-shaped part 211 to splice the two arc-shaped parts 211 together.

[0063] By setting the first connector 21141, the second connector 21142, and the screw, the two arc-shaped parts 211 can be stably spliced ​​together, thereby improving the structural stability of the entire middle layer spool 21. When it is necessary to separate the arc-shaped parts 211, simply rotate the screw to unscrew it from the first connector 21141 of one arc-shaped part 211 and the second connector 21142 of the other arc-shaped part 211, and the two arc-shaped parts 211 can be separated. Therefore, this two-section heating device has the characteristics of high structural stability and convenient disassembly.

[0064] To further explain, the side coil is wound between two protrusions 2112 located on the lower side of the arc-shaped member 211, and the first connector 21141, the second connector 21142 and the screw are located on the same side of the outer wall of the arc-shaped member 211 away from the side coil. That is, at this time, the first connector 21141, the second connector 21142 and the screw are located between two protrusions 2112 located on the upper side of the arc-shaped member 211.

[0065] To elaborate further, the screws are made of stainless steel.

[0066] In one embodiment of the present invention, the first connector 21141 is lug-shaped and the second connector 21142 is cylindrical.

[0067] To further explain, the first connector 21141 is provided with a first through hole 21141a, and the second connector 21142 is provided with a threaded hole 21142a corresponding to the shank of the screw; the head of the screw is located in the first through hole 21141a, and the shank of the screw passes through the first through hole 21141a of one arc-shaped component 211 and is threadedly connected to the threaded hole 21142a of the other arc-shaped component 211.

[0068] By setting up a matching structure of screws, first through hole 21141a and threaded hole 21142a, the two arc-shaped parts 211 can be detachably spliced, which can improve the overall structural stability and reliability of the middle layer spool 21, and also facilitate the maintenance of this two-stage heating device, reducing maintenance costs and time.

[0069] In one embodiment of this utility model, the first through hole 21141a is a flat-head hole. The flat-head hole can accommodate the head of the screw, and the screw head is located inside the flat-head hole. This not only achieves a stable connection between the two arc-shaped parts 211, but also improves the aesthetics of this two-section heating device.

[0070] like Figures 5 to 8 As shown, in one embodiment of this application, the splicing structure 2114 further includes a first slot 21143, a second slot 21144, a third slot 21145, and a plurality of protrusions 21146;

[0071] One end of the arc-shaped component 211 in the circumferential direction is provided with a second connector 21142, a first slot 21143 and a second slot 21144, and the other end of the arc-shaped component 211 in the circumferential direction is provided with a first connector 21141, a third slot 21145 and a plurality of protrusions 21146; the first slot 21143, the second slot 21144 and the third slot 21145 are all provided to extend along the height direction of the arc-shaped component 211;

[0072] In an arc-shaped component 211, a first slot 21143 is disposed on the side wall of the arc-shaped component 211 away from the protrusion 2112. A second connector 21142, a second slot 21144, a first connector 21141, and a third slot 21145 are all disposed on the side wall of the arc-shaped component 211 where the protrusion 2112 is located. A plurality of protrusions 21146 are disposed on the side of the third slot 21145 close to the protrusion 2112, and the plurality of protrusions 21146 are arranged at intervals along the extension direction of the third slot 21145.

[0073] The first slot 21143 of one arc-shaped component 211 is engaged with the third slot 21145 of another arc-shaped component 211; the second slot 21144 of one arc-shaped component 211 is engaged with several protrusions 21146 of another arc-shaped component 211.

[0074] By setting a first slot 21143, a second slot 21144, a third slot 21145, and several protrusions 21146, the first slot 21143 of one arc-shaped component 211 is engaged with the third slot 21145 of another arc-shaped component 211, and the second slot 21144 of one arc-shaped component 211 is engaged with several protrusions 21146 of another arc-shaped component 211. Combined with the first connector 21141, the second connector 21142, and screws, this mating structure enables a stable connection between the two arc-shaped components 211, effectively preventing displacement or loosening of the two arc-shaped components 211 when subjected to external forces, thus ensuring the overall stability of the middle layer spool 21 structure.

[0075] In another embodiment of this utility model, the positions of the first connector 21141 and the second connector 21142 are interchanged. That is, one end of the arc-shaped member 211 in the circumferential direction is provided with the first connector 21141, the first slot 21143 and the second slot 21144; the other end of the arc-shaped member 211 in the circumferential direction is provided with the second connector 21142, the third slot 21145 and a plurality of protrusions 21146.

[0076] like Figure 3 and 5As shown in Figure 8, in one embodiment of this application, a plurality of auxiliary blocks 21147 are provided in the second slot 21144, and the plurality of auxiliary blocks 21147 are arranged at intervals along the extending direction of the second slot 21144.

[0077] In an arc-shaped component 211, the number of auxiliary blocks 21147 is the same as the number of protrusions 21146, and the auxiliary blocks 21147 and the protrusions 21146 are staggered.

[0078] Several protrusions 21146 of one arc-shaped component 211 abut against several auxiliary blocks 21147 of another arc-shaped component 211.

[0079] In one arc-shaped component 211, several auxiliary blocks 21147 and several protrusions 21146 are staggered, and several protrusions 21146 of one arc-shaped component 211 abut against several auxiliary blocks 21147 of another arc-shaped component 211. The auxiliary blocks 21147 are set to enable the protrusions 21146 to be positioned quickly and accurately during the splicing process of the two arc-shaped components 211, reduce the time required to position the protrusions 21146, simplify the splicing process of the two arc-shaped components 211, and further improve the assembly efficiency of the middle layer spool 21.

[0080] This utility model also proposes an IH rice cooker, including any of the above-mentioned two-stage heating devices.

[0081] This IH rice cooker heats the rice from both the bottom and sides of the inner pot, ensuring even heating and consistent texture, thus improving overall rice quality. This solves the problem of rice further away from the heat source becoming undercooked or hard when the quantity is large, leading to a decline in overall rice quality.

[0082] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A two-stage heating device for use in an IH rice cooker, characterized in that, include: Bottom heating structure (1), the bottom heating structure (1) includes a bottom coil disk (11) and a bottom coil, the bottom coil being wound on the bottom coil disk (11); The side heating structure (2) includes a hollow middle layer bobbin (21) and a side coil. The middle layer bobbin (21) is detachably connected to the bottom coil disc (11), such that the bottom opening of the middle layer bobbin (21) is connected to the top opening of the bottom coil disc (11). The middle layer bobbin (21) is detachably assembled from several arc-shaped parts (211), and the side coil is wound around the outer wall of the middle layer bobbin (21).

2. The two-stage heating device according to claim 1, characterized in that, Each of the arc-shaped components (211) has a plurality of first partitions (2111) on its outer wall, and the side coil is wound around the plurality of first partitions (2111) on the side opposite to the arc-shaped component (211).

3. The two-stage heating device according to claim 2, characterized in that, The number of the arc-shaped components (211) is two. The arc-shaped components (211) are semi-circular. Each of the first partitions (2111) extends along the height direction of the arc-shaped component (211), and several first partitions (2111) are distributed at intervals on the sidewall of the arc-shaped component (211). One of the first partition plates (2111) is located at the centerline of the arc-shaped member (211), and the first partition plate (2111) located at the centerline of the arc-shaped member (211) is perpendicular to the side wall of the arc-shaped member (211); the remaining first partition plates (2111) are all parallel to the first partition plate (2111) located at the centerline of the arc-shaped member (211).

4. The two-stage heating device according to claim 3, characterized in that, The outer wall of the arc-shaped component (211) is provided with a plurality of protrusions (2112), the plurality of protrusions (2112) are arranged at intervals along the height direction of the arc-shaped component (211), and each of the protrusions (2112) extends along the circumferential direction of the arc-shaped component (211). The two ends of the first partition (2111) respectively abut against one of the protrusions (2112).

5. The two-stage heating device according to claim 4, characterized in that, The number of the protruding strips (2112) is three. One protruding strip (2112) is located at the middle position of the arc-shaped member (211) in the height direction, and the other two protruding strips (2112) are respectively located at the two side edges of the arc-shaped member (211) in the height direction. The two ends of the plurality of first partitions (2111) respectively abut against the two protruding strips (2112) located on the lower side.

6. The two-stage heating device according to claim 5, characterized in that, The outer wall of each of the arc-shaped parts (211) is also provided with a plurality of second partitions (2113), the two ends of the plurality of second partitions (2113) respectively abut against the two protrusions (2112) located on the upper side, and the plurality of second partitions (2113) are distributed at intervals on the side wall of the arc-shaped parts (211); One of the second partitions (2113) is located at the centerline of the arc-shaped member (211), and the second partition (2113) located at the centerline of the arc-shaped member (211) is perpendicular to the side wall of the arc-shaped member (211); the other second partitions (2113) are all parallel to the second partition (2113) located at the centerline of the arc-shaped member (211).

7. The two-stage heating device according to claim 5, characterized in that, The circumferential end of the arc-shaped component (211) is provided with a splicing structure (2114), the splicing structure (2114) including a first connector (21141), a second connector (21142) and a screw; the first connector (21141), the second connector (21142) and the screw are disposed on the same side of the outer wall of the arc-shaped component (211) away from the side coil; The first connector (21141) and the second connector (21142) are respectively disposed at both ends of the arc-shaped part (211) in the circumferential direction. The screw passes through the first connector (21141) of one arc-shaped part (211) and the second connector (21142) of the other arc-shaped part (211) to splice the two arc-shaped parts (211) together.

8. The two-stage heating device according to claim 7, characterized in that, The splicing structure (2114) also includes a first slot (21143), a second slot (21144), a third slot (21145), and several protrusions (21146); One end of the arc-shaped component (211) in the circumferential direction is provided with the second connector (21142), the first slot (21143) and the second slot (21144), and the other end of the arc-shaped component (211) in the circumferential direction is provided with the first connector (21141), the third slot (21145) and a plurality of protrusions (21146); the first slot (21143), the second slot (21144) and the third slot (21145) are all extended along the height direction of the arc-shaped component (211); In one of the arc-shaped components (211), the first slot (21143) is disposed on the side wall of the arc-shaped component (211) away from the protrusion (2112), the second connector (21142), the second slot (21144), the first connector (21141) and the third slot (21145) are all disposed on the side wall of the arc-shaped component (211) where the protrusion (2112) is located; a plurality of protrusions (21146) are disposed on the side of the third slot (21145) close to the protrusion (2112), and the plurality of protrusions (21146) are arranged at intervals along the extending direction of the third slot (21145); The first slot (21143) of one of the arc-shaped components (211) is engaged with the third slot (21145) of another arc-shaped component (211); the second slot (21144) of one of the arc-shaped components (211) is engaged with a plurality of the protrusions (21146) of another arc-shaped component (211).

9. The two-stage heating device according to claim 8, characterized in that, The second slot (21144) is provided with a plurality of auxiliary blocks (21147), and the plurality of auxiliary blocks (21147) are arranged at intervals along the extending direction of the second slot (21144); In one of the arc-shaped components (211), the number of auxiliary blocks (21147) is the same as the number of protrusions (21146), and the auxiliary blocks (21147) and the protrusions (21146) are staggered. A plurality of the protrusions (21146) of one of the arc-shaped members (211) abut against a plurality of the auxiliary blocks (21147) of another arc-shaped member (211).

10. An IH rice cooker, characterized in that, Includes the two-stage heating device as described in any one of claims 1 to 9.

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