Soaking type spiral coil structure of heating chassis of electric cooker
By using a spiral coil structure for even heating of the rice cooker's heating base, the inconvenience and safety hazards caused by the fixed length of the power cord are solved. This achieves automatic cord storage and even heat distribution, improving the rice cooker's ease of use and tidiness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-03-03
AI Technical Summary
The fixed length of existing rice cooker power cords makes it difficult to adapt to different socket locations, resulting in inconvenience and safety hazards. Furthermore, the lack of good storage solutions leads to kitchen clutter.
It adopts a heating plate-type spiral coil structure for rice cookers, including a bottom shell, a storage mechanism, and a heating mechanism. The power cord is automatically stored and its length is adjusted through components such as torsion springs, gears, movable rods, and springs. The copper-nickel alloy heating coil and nano-ceramic heat-conducting layer are used to achieve uniform heat conduction.
The power cord length can be flexibly adjusted, improving ease of use and neatness, while ensuring even heat distribution and normal operation of the rice cooker, thus extending its service life.
Smart Images
Figure CN223958694U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rice cooker technology, and in particular to a spiral coil structure for the heating base of a rice cooker. Background Technology
[0002] An electric rice cooker is a common kitchen appliance, mainly composed of an outer shell, inner pot, heating plate, and control system. The outer shell protects the internal components, while the inner pot holds the food (usually rice and water), and its material and design affect cooking results and ease of cleaning. The heating plate generates heat, and the control system adjusts cooking modes (such as cooking rice or porridge) and time parameters. It cooks food by converting electrical energy into heat energy. Overall, it is an appliance designed for convenient and efficient cooking of rice and other foods.
[0003] The primary function of a rice cooker is to cook food, especially staple foods like rice. It precisely controls the heating temperature and time, heating the appropriate amount of rice and water according to a set program. Heat is generated in the heating plate and transferred to the inner pot, allowing the rice to fully absorb water and expand thoroughly in the suitable temperature and moisture environment, resulting in well-cooked rice with a good texture. In addition, rice cookers can also be used to cook porridge, stew soup, and some multi-functional rice cookers can even steam, stew, and bake, greatly simplifying daily life and saving cooking time and effort.
[0004] In existing technologies, some rice cooker power cords have a fixed length, making it difficult to adapt to different socket locations. Extension cords are often required, increasing costs and safety hazards. Moreover, there is no good storage device for the power cord after use, and it is placed randomly, causing kitchen clutter. It is also easy to be pulled or stepped on, causing damage, shortening its lifespan, and increasing the risk of tripping over users. To address these issues, a spiral coil structure with uniform heating base for rice cookers is proposed. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a uniform heating spiral coil structure for the heating base of a rice cooker, aiming to improve the problems of inconvenience and low safety caused by the fixed length of the power cord in some existing rice cookers.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] The electric rice cooker heating base has a uniform heating spiral coil structure, including a bottom shell, a heating base fixedly connected to the top of the bottom shell, a storage mechanism rotatably connected inside the bottom shell, and a uniform heating mechanism fixedly connected to the bottom of the heating base.
[0008] The storage mechanism includes a rotating shaft, which is rotatably connected to the inside of the bottom shell. A torsion spring is fixedly connected to the left side of the rotating shaft, and a fixed plate is fixedly connected to the outside of the rotating shaft. A power cord is sleeved on the inner wall of the fixed plate, and a plug is fixedly connected to the front end of the power cord. A gear is fixedly connected to the right side of the rotating shaft, and a movable rod is slidably connected to the inside of the bottom shell. A rack plate is fixedly connected to the rear side of the movable rod, and the outside of the rack plate is meshed with the outside of the gear.
[0009] As a further description of the above technical solution:
[0010] The heat equalization mechanism includes multiple tripods, which are evenly distributed and fixedly connected to the bottom of the heating base. A heating coil is fitted on the bottom of each tripod. An annular plate is fixedly connected to the bottom of the heating base. Multiple guide holes are opened inside the annular plate. A ventilation duct is opened on the front side of the inside of the bottom shell. A fan is fixedly connected to the inner wall of the ventilation duct. Multiple heat dissipation holes are opened at the bottom of the bottom shell.
[0011] As a further description of the above technical solution:
[0012] A circular plate is fixedly connected to the outside of the movable rod, and a spring is sleeved on the outside of the movable rod;
[0013] As a further description of the above technical solution:
[0014] The bottom shell has a cylindrical cavity inside, the outer wall of the circular plate is slidably connected to the inner wall of the cylindrical cavity, the front side of the spring is fixedly connected to the front inner wall of the cylindrical cavity, and the rear side of the spring is fixedly connected to the front side of the circular plate.
[0015] As a further description of the above technical solution:
[0016] A pull plate is fixedly connected to the front side of the movable rod, and the rear side of the pull plate contacts the front side of the bottom shell;
[0017] As a further description of the above technical solution:
[0018] The tripod is made of epoxy resin, the heating base is made of aluminum alloy, and the bottom side of the annular plate is fixedly connected to the bottom inner wall of the base shell.
[0019] As a further description of the above technical solution:
[0020] The tripod has a winding groove on its outside, and the outer wall of the heating coil engages with the inner wall of the winding groove.
[0021] As a further description of the above technical solution:
[0022] The heating coil is made of copper-nickel alloy, and a heat-conducting layer is fixedly connected to the outside of the heating coil. The heat-conducting layer is made of nano-ceramic.
[0023] This utility model has the following beneficial effects:
[0024] 1. In this utility model, when the power cord is pulled out, the torsion spring is compressed, and after being released, the power cord can be automatically retracted. The spring, the circular plate, and the cylindrical cavity, along with the movable rod and the rack plate, can fix the length of the extended power cord. When the plug is pulled out to the appropriate length, the pulling plate is released, and the spring pushes the movable rod to re-engage the rack plate with the gear, thus fixing the length of the power cord. This adapts to the distance requirements between the socket and the rice cooker in different kitchen environments, making it convenient for users to flexibly adjust the length of the power cord in different usage scenarios. This avoids the mess caused by an excessively long power cord or the situation where the power cord is too short to use. At the same time, the automatic storage function also improves the overall neatness and ease of use of the rice cooker.
[0025] 2. In this utility model, the heating base is made of aluminum alloy, which has high thermal conductivity. The heating coil is made of copper-nickel alloy and has a nano-ceramic thermal conductive layer on the outside. After the electromagnetic eddy current is generated when the power is turned on, the heat can be quickly conducted to the heating base. The epoxy resin tripod accurately positions the heating coil through the winding groove, forming equidistant heat conduction nodes to construct a multi-directional heat transfer path, so that the heat can be evenly diffused on the heating base 2, ensuring that food such as rice is heated evenly. Attached Figure Description
[0026] Figure 1 This is a perspective view of the uniform heating spiral coil structure of the rice cooker heating plate proposed in this utility model.
[0027] Figure 2 This is a schematic diagram of the bottom shell of the rice cooker heating plate with a uniform heating spiral coil structure proposed in this utility model.
[0028] Figure 3 This is a schematic diagram of the annular plate of the uniform heating spiral coil structure for the rice cooker heating base proposed in this utility model.
[0029] Figure 4 for Figure 2 Enlarged view of point A in the middle.
[0030] Legend:
[0031] 1. Bottom shell; 2. Heating base; 3. Rotating shaft; 4. Torsion spring; 5. Fixed plate; 6. Power cord; 7. Plug; 8. Gear; 9. Movable rod; 10. Rack plate; 11. Circular plate; 12. Spring; 13. Cylindrical cavity; 14. Pull plate; 15. Tripod; 16. Heating coil; 17. Ventilation duct; 18. Fan; 19. Annular plate; 20. Guide hole; 21. Heat dissipation hole. Detailed Implementation
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0033] Reference Figure 1 , Figure 2 and Figure 4 An embodiment of this utility model is provided: a heating plate of a rice cooker with a uniform heating spiral coil structure, including a bottom shell 1, which is used to provide support for the rice cooker. A heating plate 2 is fixedly connected to the top of the bottom shell 1. The heating plate 2 is used to transfer heat to the inner pot of the rice cooker above to cook food. A storage mechanism is rotatably connected inside the bottom shell 1. A uniform heating mechanism is fixedly connected to the bottom of the heating plate 2.
[0034] The storage mechanism includes a rotating shaft 3, which is rotatably connected to the inside of the bottom shell 1. The rotating shaft 3 provides a rotational support point for other components of the storage mechanism. A torsion spring 4 is fixedly connected to the left side of the rotating shaft 3, and a fixing plate 5 is also fixedly connected to the outside of the rotating shaft 3. A power cord 6 is sleeved on the inner wall of the fixing plate 5, and a plug 7 is fixedly connected to the front end of the power cord 6. The main function of the torsion spring 4 is to store energy. When the power cord 6 is pulled out, the torsion spring 4 is compressed; when the power cord 6 needs to be retracted, the torsion spring 4 releases the stored energy, driving the rotating shaft 3 and the fixing plate 5 to rotate, thereby retracting the power cord 6 and the plug 7, achieving the automatic storage function of the power cord 6. The fixing plate 5 is used to drive the power cord 6 to perform a rotating storage or extension operation, ensuring that the power cord 6 remains orderly during storage and extension, preventing the power cord 6 from tangling or knotting, and ensuring smooth operation. The power cord 6 is responsible for introducing external power into the rice cooker, and the plug 7 is the interface for connecting the rice cooker to the external power source. A gear 8 is fixedly connected to the outer right side of the rotating shaft 3. A movable rod 9 is slidably connected inside the bottom shell 1. A rack plate 10 is fixedly connected to the rear side of the movable rod 9. The outer side of the rack plate 10 is meshed with the outer side of the gear 8. When the rack plate 10 disengages from the gear 8, the gear 8 can rotate freely. A circular plate 11 is fixedly connected to the outer side of the movable rod 9. A spring 12 is sleeved on the outer side of the movable rod 9. A cylindrical cavity 13 is opened inside the bottom shell 1. The outer wall of the circular plate 11 is slidably connected to the inner wall of the cylindrical cavity 13. The front side of the spring 12 is fixedly connected to the front inner wall of the cylindrical cavity 13, and the rear side of the spring 12 is fixedly connected to the front side of the circular plate 11. When the movable rod 9 moves forward, it can drive the rack plate 10 to disengage from the gear 8, and at the same time drive the circular plate 11 to compress the spring 12. When it moves backward, it can drive the rack plate 10 to re-mesh with the gear 8, thereby fixing the rotating shaft 3 and playing a key role in controlling the adjustment of the power cord 6. A pull plate 14 is fixedly connected to the front side of the movable rod 9. The rear side of the pull plate 14 contacts the front side of the bottom shell 1. When the movable rod 9 moves forward, the spring 12 is compressed and stores energy. When the pull plate 14 is released, the spring 12 releases energy, pushing the circular plate 11 and the movable rod 9 to move backward, causing the rack plate 10 to re-mesh with the gear 8. It is a power auxiliary component for controlling the extension and retraction of the power cord 6. By pulling the pull plate 14, the movement of the movable rod 9 can be easily controlled, thereby controlling the operation of the entire storage mechanism. The pull plate 14 is the direct operating component for the user to operate the extension and retraction of the power cord 6. It is simple in design and easy to use.
[0035] Reference Figure 1 , Figure 2 and Figure 3The heat equalization mechanism includes multiple tripods 15, which are evenly distributed and fixedly connected to the bottom of the heating base 2. The heating base 2 is made of aluminum alloy, and the tripods 15 are made of epoxy resin. A heating coil 16 is fitted onto the bottom of each tripod 15. The heating coil 16 is made of copper-nickel alloy, and a heat-conducting layer made of nano-ceramic is fixedly connected to the outside of the heating coil 16. A winding groove is formed on the outside of the tripod 15, and the outer wall of the heating coil 16 engages with the inner wall of the winding groove. When the heating coil 16 is energized, it generates electromagnetic eddy currents. The surface nano-ceramic heat-conducting layer conducts heat quickly. The nano-ceramic material has good thermal conductivity, which can reduce heat loss during the conduction process and improve the efficiency of heat conduction, thus helping to achieve a uniform heat equalization effect on the heating base 2. The winding groove can accurately position the heating coil 16, so that the heating coil 16 is evenly distributed, constructing a multi-directional heat transfer path, and ensuring that the heat generated by the heating coil 16 can be efficiently and evenly conducted to the heating base 2. A ring plate 19 is fixedly connected to the bottom of the heating base 2. The bottom side of the ring plate 19 is fixedly connected to the bottom inner wall of the bottom shell 1. Multiple guide holes 20 are opened inside the ring plate 19. A ventilation duct 17 is opened on the front side of the bottom shell 1. A fan 18 is fixedly connected to the inner wall of the ventilation duct 17. The ventilation duct 17 provides a flow channel for the cooling airflow generated by the fan 18. The multiple guide holes 20 opened inside the ring plate 19 guide the cooling airflow generated by the fan 18. When the airflow passes through the guide holes 20, it generates a Venturi effect, which accelerates and evenly covers the bottom of the heating base 2, forming continuous convection heat dissipation. This plays a key guiding role in the heat dissipation process. Multiple heat dissipation holes 21 are opened at the bottom of the bottom shell 1. The heat dissipation holes 21 are the outlets for the heat dissipation airflow. The airflow carrying heat through the bottom of the heating base 2 is finally discharged to the external environment through the heat dissipation holes 21, realizing the heat dissipation function of the heating base 2, preventing the heating base 2 from overheating, and ensuring the normal operation and service life of the rice cooker.
[0036] Working principle: When the rice cooker needs to be used, pulling the pull plate 14 moves the movable rod 9 forward. The forward movement of the movable rod 9 moves the rack plate 10 forward, thereby disengaging it from the gear 8, allowing the gear 8 to rotate. During the forward movement of the movable rod 9, the circular plate 11 moves forward, compressing the spring 12. Then, the plug 7 is removed, causing the power cord 6 to move forward a suitable length. The movement of the power cord 6 drives the fixed plate 5 to rotate, which in turn drives the rotating shaft 3 to rotate, causing the torsion spring to... 4. After compression, the pull plate 14 is released. The compressed spring 12 generates pressure, which drives the movable rod 9 to move backward through the circular plate 11. This, in turn, drives the rack plate 10 to move backward and mesh with the gear 8, thereby fixing the gear 8 and the rotating shaft 3. This allows the extension distance of the power cord 6 to be adjusted to adapt to different kitchen environments. When it is necessary to retract the power cord 6, the engagement of the gear 8 and the rack plate 10 is released by pulling the pull plate 14. At this time, the compressed torsion spring 4 will drive the rotating shaft 3 and the fixed plate 5 to rotate, thereby retracting the plug 7 and the power cord 6.
[0037] When the heating coil 16, made of copper-nickel alloy, is energized, it generates electromagnetic eddy currents. The nano-ceramic thermal conductive layer on its surface rapidly conducts heat to the heating base 2 made of aluminum alloy. The high thermal conductivity of aluminum alloy is used to achieve radial heat diffusion. The epoxy resin tripod 15 precisely positions the heating coil 16 through the winding groove, forming multiple heat conduction nodes that are evenly distributed, thus constructing a multi-directional heat transfer path. The cooling airflow generated by the fan 18 forms a laminar flow along the ventilation duct 17. When it passes through the guide holes 20 arranged in a circular array on the annular plate 19, it generates a Venturi effect, which accelerates the airflow and evenly covers the bottom of the heating base 2. The airflow forms a spiral upward trajectory in the inner cavity of the annular plate 19 and is finally discharged through the heat dissipation holes 21 at the bottom of the bottom shell 1, forming continuous convective heat dissipation.
[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A heating plate of a rice cooker with a uniform heating spiral coil structure, including a bottom shell (1), characterized in that: A heating base (2) is fixedly connected to the top of the bottom shell (1), a storage mechanism is rotatably connected inside the bottom shell (1), and a heat equalization mechanism is fixedly connected to the bottom of the heating base (2). The storage mechanism includes a rotating shaft (3), which is rotatably connected to the inside of the bottom shell (1). A torsion spring (4) is fixedly connected to the left side of the rotating shaft (3). A fixed plate (5) is fixedly connected to the outside of the rotating shaft (3). A power cord (6) is sleeved on the inner wall of the fixed plate (5). A plug (7) is fixedly connected to the front end of the power cord (6). A gear (8) is fixedly connected to the right side of the rotating shaft (3). A movable rod (9) is slidably connected inside the bottom shell (1). A rack plate (10) is fixedly connected to the rear side of the movable rod (9). The outside of the rack plate (10) is meshed with the outside of the gear (8).
2. The electric rice cooker heating plate uniform heating spiral coil structure according to claim 1, characterized in that: The heat equalization mechanism includes multiple tripods (15), which are evenly distributed and fixedly connected to the bottom of the heating base (2). A heating coil (16) is sleeved on the bottom of each tripod (15). An annular plate (19) is fixedly connected to the bottom of the heating base (2). Multiple guide holes (20) are opened inside the annular plate (19). A ventilation duct (17) is opened on the front side of the interior of the bottom shell (1). A fan (18) is fixedly connected to the inner wall of the ventilation duct (17). Multiple heat dissipation holes (21) are opened at the bottom of the bottom shell (1).
3. The heating plate uniform heating spiral coil structure of the rice cooker according to claim 1, characterized in that: A circular plate (11) is fixedly connected to the outside of the movable rod (9), and a spring (12) is sleeved on the outside of the movable rod (9).
4. The electric rice cooker heating plate uniform heating spiral coil structure according to claim 3, characterized in that: The bottom shell (1) has a cylindrical cavity (13) inside. The outer wall of the circular plate (11) is slidably connected to the inner wall of the cylindrical cavity (13). The front side of the spring (12) is fixedly connected to the front inner wall of the cylindrical cavity (13), and the rear side of the spring (12) is fixedly connected to the front side of the circular plate (11).
5. The electric rice cooker heating plate uniform heating spiral coil structure according to claim 1, characterized in that: A pull plate (14) is fixedly connected to the front side of the movable rod (9), and the rear side of the pull plate (14) is in contact with the front side of the bottom shell (1).
6. The electric rice cooker heating plate uniform heating spiral coil structure according to claim 2, characterized in that: The tripod (15) is made of epoxy resin, the heating base (2) is made of aluminum alloy, and the bottom side of the annular plate (19) is fixedly connected to the bottom inner wall of the bottom shell (1).
7. The heating plate helical coil structure for a rice cooker according to claim 2, characterized in that: The tripod (15) has a winding groove on its outside, and the outer wall of the heating coil (16) engages with the inner wall of the winding groove.
8. The electric rice cooker heating plate uniform heating spiral coil structure according to claim 2, characterized in that: The heating coil (16) is made of copper-nickel alloy, and a heat-conducting layer is fixedly connected to the outside of the heating coil (16). The heat-conducting layer is made of nano-ceramic.