Electric cooker
By designing airflow channels in the inner pot and lid of the rice cooker and controlling the heating elements separately, the problems of uneven heating and condensation are solved, achieving uniform heating and good heat preservation.
Patent Information
- Application Number
- CN202423054909.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-10
AI Technical Summary
The uneven heating in existing rice cookers results in high temperatures at the bottom of the pot and low temperatures at the rim, leading to poor heat retention. Furthermore, the low temperature of the lid makes it easy for condensation to form, affecting the taste of the rice.
The design employs a first airflow channel between the inner pot and the outer pot, and a second airflow channel inside the lid. The heating assembly includes a first heating element and a second heating element that are controlled separately. The first heating element is located at the bottom of the inner pot, and the second heating element is located in the airflow channel. Hot air circulates through the airflow channel to heat the outer periphery of the inner pot and the upper lid area.
It achieves uniform heating in all parts of the inner pot, reduces condensation, improves long-term heat preservation, and ensures the taste of the rice.
Smart Images
Figure CN223614555U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of household appliance technology, and in particular to an electric rice cooker. Background Technology
[0002] Currently, in rice cookers that use only a single heating element to heat the inner pot, the heating element only contacts the bottom of the inner pot, resulting in a high temperature at the bottom and a low temperature at the rim, causing uneven heating. Furthermore, the lid has a low temperature and poor heat retention, which can easily lead to condensation. This condensation can cause white drips onto the surface of the rice, affecting its taste. Utility Model Content
[0003] The main purpose of this invention is to provide a rice cooker that reduces condensation on the lid and improves the uniformity of heating.
[0004] To achieve the above objectives, this utility model proposes a rice cooker, comprising:
[0005] The pot body includes an inner pot and an outer pot, and a first airflow channel is formed between the inner pot and the outer pot. The first airflow channel is distributed on the outer peripheral surface of the inner pot.
[0006] The lid has a second airflow channel inside, which covers the opening of the inner pot. The surface of the lid is also provided with an exhaust hole that communicates with the second airflow channel.
[0007] The heating assembly includes a first heating element and a second heating element that are controlled separately. The first heating element is disposed at the bottom of the inner pot, and the second heating element is disposed in the first airflow channel.
[0008] When the lid is closed on the pot body, the first airflow channel can communicate with the second airflow channel.
[0009] In one embodiment, the second heating element is disposed at the bottom of the first airflow channel;
[0010] And / or, the second heating element is arranged around the outer periphery of the first heating element.
[0011] In one embodiment, the second heating element is a heating tube, which is fixedly connected to the outer pot by a fixing member;
[0012] And / or, the first heating element is a heating plate, which is in contact with the bottom wall of the inner pot.
[0013] In one embodiment, the gap between the outer and inner peripheral surfaces of the outer pot and the inner pot is ≥2mm;
[0014] And / or, the opening of the inner pot is located above the interface between the lid and the pot body, and the distance between the opening of the outer pot and the interface is ≥8mm.
[0015] In one embodiment, the cover includes an upper cover, an inner cover, and a cover plate assembly stacked sequentially. The second airflow channel is disposed between the inner cover and the cover plate assembly. The exhaust port is disposed on the upper cover. An air guide nozzle capable of forming a chimney effect is formed on the inner cover. The air guide nozzle is connected to the exhaust port.
[0016] In one embodiment, the cover plate assembly includes:
[0017] A fixed cover is connected to the inner cover;
[0018] A plate body, connected to the fixed cover, and positioned to cover the opening of the inner pot; and
[0019] A sealing ring includes a fixed part and a sealing part connected together. The fixed part is fixed at the connection between the fixed cover and the plate, and the sealing part extends toward the inner pot side.
[0020] When the lid is placed on the pot body, the sealing part deforms, and the sealing part can seal the opening of the inner pot with the plate body;
[0021] The second airflow channel communicates with the first airflow channel via the outer annular surface of the sealing portion.
[0022] In one embodiment, a gas guiding structure is formed on the surfaces where the fixed cover and the sealing portion contact.
[0023] In one embodiment, the cross-sectional area of the air guide nozzle is smaller than the cross-sectional area of the second airflow channel.
[0024] In one embodiment, the air vent is positioned close to the center of the cover.
[0025] Furthermore, the projection of the vent on the top cover is located within the projection range of the steam valve of the rice cooker on the top cover.
[0026] In one embodiment, the outer ring connecting the first airflow channel and the second airflow channel is further provided with a sealing element.
[0027] The rice cooker disclosed in this utility model includes a cooker body, a lid, and a heating element. A first airflow channel is formed between the inner pot and the outer pot of the cooker body, distributed on the outer circumference of the inner pot. A second airflow channel is formed inside the lid, covering the opening of the inner pot. An exhaust vent communicating with the second airflow channel is also provided on the surface of the lid. When the lid is closed on the cooker body and cooking is started, the heating element begins to operate. A first heating element located at the bottom of the inner pot quickly heats the contents of the inner pot, while a second heating element located in the first airflow channel heats the air within the first airflow channel. The heated air flows sequentially through the first and second airflow channels and is exhausted through the exhaust vent. Because the first airflow channel is distributed on the outer circumference of the inner pot, and the second airflow channel also covers the area above the opening of the inner pot, the entire inner pot is enveloped in hot air, with virtually no heating blind spots, achieving uniform heating throughout the inner pot. Meanwhile, since the second heating element does not directly contact the inner pot and is controlled separately from the first heating element, the second heating element can maintain high heating efficiency throughout the cooking stage and the subsequent heat preservation stage. This ensures that hot air flows in the first and second airflow channels, reduces the temperature difference between the lid and the bottom of the inner pot, and avoids condensation on the lid due to the large temperature difference with the bottom of the inner pot. This effectively prevents condensation from dripping onto the surface of the rice and also makes the rice cooker have a good heat preservation effect during the long heat preservation stage. Attached Figure Description
[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0029] Figure 1 A cross-sectional view of an embodiment of the rice cooker provided by this utility model;
[0030] Figure 2 for Figure 1 Enlarged view of section A in the middle;
[0031] Figure 3 A cross-sectional view of the lid portion structure of an embodiment of the rice cooker provided by this utility model;
[0032] Figure 4 A schematic diagram of the inner lid of an embodiment of the rice cooker provided by this utility model;
[0033] Figure 5 A schematic diagram of the structure of the top cover of an embodiment of the rice cooker provided by this utility model;
[0034] Figure 6 This is a schematic diagram of the structure of the second heating element in an embodiment of the rice cooker provided by this utility model.
[0035] Explanation of icon numbers:
[0036]
[0037] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0039] It should be noted that if the embodiments of this utility model involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.
[0040] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0041] In the current rice cooker 100 that only uses a heating plate to heat the inner pot 13, the heating plate only contacts the bottom of the inner pot 13, resulting in a high temperature at the bottom and a low temperature at the rim, causing uneven heating. Furthermore, the temperature of the lid 21 is low, resulting in poor heat retention and easy condensation, which can cause white dripping onto the surface of the rice and affect its taste.
[0042] Based on the above problems, the present invention aims to provide a rice cooker 100.
[0043] Reference Figures 1 to 5 An embodiment of the present invention, a rice cooker 100, includes a cooker body 10, a lid 20, and a heating assembly (not shown in the figure). The cooker body 10 includes an inner pot 13 and an outer pot 11. A first airflow channel 15 is formed between the inner pot 13 and the outer pot 11. The first airflow channel 15 is distributed on the outer peripheral surface of the inner pot 13. A second airflow channel 22 (not shown in the figure) is formed inside the lid 20. The second airflow channel 22 covers the opening of the inner pot 13. The surface of the lid 20 is also provided with an exhaust hole 211 communicating with the second airflow channel 22. The heating assembly includes a first heating element 31 and a second heating element 33, which are controlled separately. The first heating element 31 is disposed at the bottom of the inner pot 13, and the second heating element 33 is disposed in the first airflow channel 15. When the lid 20 is closed on the cooker body 10, the first airflow channel 15 can communicate with the second airflow channel 22. The hot air heated by the second heating element 33 flows sequentially through the first airflow channel 15 and the second airflow channel 22 and is discharged through the exhaust hole 211.
[0044] When the lid 20 is placed over the pot body 10 and cooking is started, the heating components begin to operate. The first heating element 31, located at the bottom of the inner pot 13, quickly heats the food inside the inner pot 13. The second heating element 33, located in the first airflow channel 15, heats the air within the first airflow channel 15. The heated air then flows sequentially through the first airflow channel 15 and the second airflow channel 22, and is discharged through the exhaust port 211. Figure 1 As shown, the black arrows indicate the direction of hot air flow. Since the first airflow channel 15 is distributed on the outer periphery of the inner pot 13, and the second airflow channel 22 also covers the area above the opening of the inner pot 13, the entire inner pot 13 is enveloped in hot air from all directions, with almost no heating blind spots, thus improving the uniformity of heating in all parts of the inner pot 13. Simultaneously, since the second heating element 33 does not directly contact the inner pot 13 and is controlled separately from the first heating element 31, the second heating element 33 can maintain high heating efficiency throughout the cooking stage and the subsequent heat preservation stage. This ensures hot air flow within the first airflow channel 15 and the second airflow channel 22, reducing the temperature difference between the lid 20 and the bottom of the inner pot 13. This prevents condensation from forming on the lid 20 due to the large temperature difference with the bottom of the inner pot 13, effectively preventing condensation from dripping onto the rice surface. It also ensures good heat preservation during the long-term heat preservation stage of the rice cooker 100.
[0045] Understandably, controlling the first heating element 31 and the second heating element 33 separately means that their start-up time and heating power can be controlled separately. These parameters of the two heating elements can be the same or different. For example, the first heating element 31 and the second heating element 33 can start working simultaneously, that is, both the first heating element 31 and the second heating element 33 start working at the beginning of the cooking stage. This can speed up the heating efficiency of the rice cooker 100 and shorten the cooking time. Of course, the second heating element 33 can also start working at the end of the cooking stage or in the heat preservation stage. That is, the second heating element 33 starts working after the heating power of the first heating element 31 decreases. This can effectively ensure that the rice cooker 100 maintains sufficient heat source in the first airflow channel 15 and the second airflow channel 22 at the end of the cooking stage and in the heat preservation stage after the cooking stage ends. This reduces the temperature difference between the bottom of the inner pot 13 and other parts, avoids the formation of condensation on the lid 20, and also improves the heat preservation effect of the rice cooker 100 in the long-term heat preservation state.
[0046] In one embodiment, the first heating element 31 can be a heating plate or a coil. The first heating element 31 is fixed on the outer pot 11 and contacts the bottom of the inner pot 13. During operation, the first heating element 31 conducts most of the heat to the inner pot 13 through contact with the surface of the inner pot 13. When the first heating element 31 is a heating plate, the heating plate is limited to 300 degrees Celsius due to the material limitations, and the heating efficiency of the heating plate for air is limited at this time. By setting a second heating element 33 in the first airflow channel 15, the second heating element 33 can quickly heat the air in the first airflow channel 15. When the heated air flows through the first airflow channel 15 and the second airflow channel 22, it can achieve full coverage of the outer circumference of the inner pot 13 and the area of the pot opening, reducing the temperature difference between the bottom of the inner pot 13 and other positions, improving the heating uniformity during the cooking stage, and also reducing the temperature difference between the bottom of the inner pot 13 and other positions, avoiding the formation of condensation on the lid 20, and also improving the heat preservation effect of the rice cooker 100 during long-term heat preservation.
[0047] The second heating element 33 can be an electric heating tube or other electric heating medium. Electric heating tubes have advantages such as small size, easy installation, and high heating efficiency. The electric heating tube can be a stainless steel electric heating tube or a carbon fiber electric heating tube. The heating temperature of the electric heating tube can reach 300 degrees to 600 degrees, which can quickly heat the air in the first airflow channel 15, effectively ensuring that the air in the first airflow channel 15 and the second airflow channel 22 has a sufficient heat source, thereby achieving uniform heating during the cooking stage. During the heat preservation stage, it avoids the occurrence of condensation on the lid 20 due to the large temperature difference between it and the bottom of the inner pot 13. At the same time, it also improves the heat preservation effect of the rice cooker 100 during long-term heat preservation.
[0048] The heating element is arranged in a ring shape. During installation, both ends of the heating element are fixed using a fixing piece 35, and then the fixing piece 35 is fixed to the outer pot 11 to complete the installation of the heating element. (Refer to...) Figure 6 The fixing part 35 is a fixing plate with two spaced fixing holes (not shown in the figure). The two ends of the heating tube are inserted into the fixing holes respectively. Then the fixing plate is locked onto the outer pot 11, which is convenient and quick to install.
[0049] Please refer to Figure 1 In one embodiment, the second heating element 33 is disposed at the bottom of the first airflow channel 15.
[0050] And / or, the second heating element 33 is arranged around the outer periphery of the first heating element 31.
[0051] Understandably, the second heating element 33 can be positioned anywhere within the first airflow channel 15. For example, the second heating element 33 can be positioned near the bottom of the first airflow channel 15, near the top of the first airflow channel 15, or in the middle of the first airflow channel 15. Of course, positioning the second heating element 33 at the bottom is preferable, as this position not only facilitates its installation but also effectively prevents accidental contact with the second heating element 33 during use of the rice cooker 100. Furthermore, by positioning the second heating element 33 at the bottom of the first airflow channel 15, the upward movement of hot air reduces heating blind spots, effectively ensuring uniform heating.
[0052] In one embodiment, the second heating element 33 is also arranged around the outer periphery of the first heating element 31. This facilitates the installation of the second heating element 33 and allows it to be located at the bottom of the first airflow channel 15, effectively reducing the heating blind spot and minimizing the impact of the high temperature generated by the second heating element 33 on other components of the rice cooker 100. Furthermore, it saves space, as the presence of the second heating element 33 does not significantly affect the overall size of the rice cooker 100.
[0053] It should be noted that the bottom of the first airflow channel 15 and the outer periphery of the first heating element 31 can be in the same location or in different locations, depending on the specific structure of the rice cooker 100.
[0054] Please refer to Figure 1 In one embodiment, the gap between the outer circumferential surfaces of the outer pot 11 and the inner pot 13 is ≥2mm;
[0055] And / or, the opening of the inner pot 13 is located above the interface between the lid 20 and the pot body 10, and the distance between the opening of the outer pot 11 and the interface is ≥8mm.
[0056] In one technical solution of this embodiment, by setting the gap between the outer peripheral surface of the inner pot 13 and the outer pot 11 to be greater than or equal to 2mm, the resistance to air flow in the first airflow channel 15 can be reduced, which is more conducive to the airflow after heating.
[0057] In another embodiment, by setting the opening of the inner pot 13 above the interface between the lid 20 and the pot body 10, the loss of hot air from the gap between the lid 20 and the pot body 10 in the first airflow channel 15 can be reduced, ensuring that most of the hot air can flow upward into the second airflow channel 22, so that there is enough hot air in the second airflow channel 22 to maintain the temperature of the lid 20 and the opening of the inner pot 13.
[0058] In one embodiment, to reduce the escape of hot air from the gap between the lid 20 and the pot body 10 within the first airflow channel 15, a sealing element can be provided on the outer ring connecting the first airflow channel 15 and the second airflow channel 22. Specifically, the sealing element can be provided on the lid 20, on the pot body 10, or on both the lid 20 and the pot body 10 to reduce the escape of hot air. It is understood that the structure of the sealing element in this embodiment can be flexibly adjusted according to the sealing requirements and its location, as long as it can seal the connection between the first airflow channel 15 and the second airflow channel 22. The specific structure of the sealing element will not be described here.
[0059] Please refer to Figures 1 to 4 In one embodiment, the cover 20 includes an upper cover 21, an inner cover 23, and a cover plate assembly 25 stacked sequentially. The second airflow channel 22 is disposed between the inner cover 23 and the cover plate assembly 25. The exhaust port 211 is disposed on the upper cover 21. An air guide nozzle 231 capable of forming a chimney effect is formed on the inner cover 23. The air guide nozzle 231 is connected to the exhaust port 211.
[0060] In this embodiment, the upper cover 21 covers the outside of the inner cover 23, and the cover plate assembly 25 is connected to the side of the inner cover 23 opposite to the upper cover 21. Typically, the cover plate assembly 25 covers the entire opening of the inner pot 13. By forming a second airflow channel 22 between the inner cover 23 and the cover plate assembly 25, heat loss of the hot air within the second airflow channel 22 can be reduced, effectively reducing the temperature difference between the top and bottom of the inner pot 13, preventing condensation, and maintaining good heat preservation. Understandably, both the inner cover 23 and the cover plate assembly 25 can be made of materials with poor thermal conductivity to further reduce heat loss.
[0061] Typically, the width of the second airflow channel 22 formed by the cover assembly 25 and the inner cover 23 is not less than 2 mm. This reduces the resistance to airflow within the second airflow channel 22, making it easier for heated air to flow through it. Of course, the gap between the cover assembly 25 and the inner cover 23 at the location that provides a limiting or sealing function is not subject to the above restrictions.
[0062] In one embodiment, the inner cover 23 is further provided with a vent 231 that communicates with the vent 211 of the upper cover 21. The vent 231 has a cylindrical structure that protrudes from the upper cover 21, forming a shape similar to a chimney.
[0063] In one embodiment, the cross-sectional area of the air guide nozzle 231 is smaller than the cross-sectional area of the second airflow channel 22, which can create a chimney effect when hot air is discharged through the air guide nozzle 231. Understandably, the cross-sectional area refers to the area along the direction of airflow, and the cross-sectional area determines the airflow rate.
[0064] Specifically, when the second heating element 33 is working, the heated air flows from the first airflow channel 15 to the second airflow channel 22, covering the entire second airflow channel 22. Due to the chimney effect, as the hot air flows from the second airflow channel 22 into the air guide nozzle 231, the hot air rises, forming a negative pressure area at its inlet. This guides the hot air in the second airflow channel 22 to flow evenly towards the air guide nozzle 231. When the air guide nozzle 231 is positioned at the center of the inner cover 23, it guides the air in the second airflow channel 22 to flow evenly towards the center, thereby ensuring that the hot air covers all areas of the entire second airflow channel 22 and further reducing the temperature difference.
[0065] Understandably, the projection of the air guide nozzle 231 on the horizontal plane is located inside the projection of the exhaust hole 211 on the horizontal plane. That is, when the air guide nozzle 231 is set at the center of the inner cover 23, the exhaust hole 211 is located directly above the air guide nozzle 231. In this way, the path of air after being discharged through the air guide nozzle 231 can be reduced, and the smoothness of gas discharge can be improved.
[0066] In one embodiment, the projection of the vent 211 onto the top cover 21 is located within the projection range of the steam valve 26 of the rice cooker onto the top cover 21.
[0067] Understandably, since the top cover 21 is the outer surface of the rice cooker 100, in order to improve the cleanliness and aesthetics of the top cover 21, the mounting hole of the steam valve 26 of the rice cooker 100 can be used as the vent 211. Since the top size of the steam valve 26 is relatively large, the projection of the vent 211 on the top cover 21 is located inside the projection range of the steam valve 26 of the rice cooker on the top cover 21. In this way, the steam valve 26 can effectively block the vent 211, thereby improving the cleanliness and aesthetics of the surface of the rice cooker 100.
[0068] Please refer to Figures 1 to 3 In one embodiment, the cover assembly 25 includes a fixed cover 251, a plate 253, and a sealing ring 255. The fixed cover 251 is connected to the inner cover 23. The plate 253 is connected to the fixed cover 251 and covers the opening of the inner pot 13. The sealing ring 255 includes a fixed portion 2551 and a sealing portion 2553 connected to each other. The fixed portion 2551 is fixed at the connection between the fixed cover 251 and the plate 253, and the sealing portion 2553 extends toward the inner pot 13. When the cover 20 is closed on the pot body 10, the sealing portion 2553 deforms, and the sealing portion 2553 can seal the opening of the inner pot 13 with the plate 253. The second airflow channel 22 communicates with the first airflow channel 15 through the outer ring surface of the sealing portion 2553.
[0069] In this embodiment, the fixing cover 251 is annularly arranged and connected to the inner cover 23, used to fix the entire cover assembly 25 to the inner cover 23. The plate body 253 is a plate-shaped structure adapted to the inner cover 23. The plate body 253 can be a flat plate or an arc-shaped plate, etc. The outer edge of the plate body 253 is connected to the fixing cover 251, so that the entire plate body 253 can cover the opening of the inner pot 13. The sealing ring 255 includes a fixed part 2551 and a sealing part 2553 connected to each other. The fixed part 2551 is clamped and fixed by the fixing cover 251 and the plate body 253 to fix the sealing ring 255. The fixing part 2551 of the sealing element can be adjusted according to the fixing method between the plate body 253 and the fixing cover 251, such as... Figure 2 In the middle, the fixing part 2551 forms multiple bent structures arranged at an angle. This structure facilitates the clamping of the fixing part 2551 by the sealing cover and the plate 253. For example... Figure 3In the middle, the fixing part 2551 has a fixing hole to facilitate fixing the sealing ring 255 to the fixing cover 251 by means of buckles or screws. The sealing part 2553 is used to seal the opening of the inner pot 13, so that a sealed space is formed between the inside of the inner pot 13 and the cover body 20. Here, the structure of the sealing part 2553 sealing the opening of the inner pot 13 will not be described in detail. It can be understood that when the cover body 20 is closed on the pot body 10, the sealing part 2553 deforms, and the inner ring surface of the sealing part 2553 seals the opening of the inner pot 13 with the plate body 253; at this time, a gap is formed between the outer ring surface of the sealing part 2553 and the fixing cover 251, so that the air between the first airflow channels 15 can flow into the second airflow channel 22.
[0070] Furthermore, in order to facilitate better airflow from the first airflow channel 15 into the second airflow channel 22, a gas guiding structure can be formed on the surface where the fixed cover 251 and the sealing part 2553 contact. Specifically, the gas guiding structure can be a sloping surface or an arc surface, or any structure that facilitates the flow of gas from the first airflow channel 15 into the second airflow channel 22.
[0071] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A rice cooker, characterized in that, include: The pot body includes an inner pot and an outer pot, and a first airflow channel is formed between the inner pot and the outer pot. The first airflow channel is distributed on the outer peripheral surface of the inner pot. The lid has a second airflow channel inside, which covers the opening of the inner pot. The surface of the lid is also provided with an exhaust hole that communicates with the second airflow channel. The heating assembly includes a first heating element and a second heating element that are controlled separately. The first heating element is disposed at the bottom of the inner pot, and the second heating element is disposed in the first airflow channel. When the lid is closed on the pot body, the first airflow channel is connected to the second airflow channel.
2. The rice cooker as described in claim 1, characterized in that, The second heating element is located at the bottom of the first airflow channel; And / or, the second heating element is arranged around the outer periphery of the first heating element.
3. The rice cooker as described in claim 2, characterized in that, The second heating element is a heating tube, which is fixedly connected to the outer pot by a fixing component; And / or, the first heating element is a heating plate, which is in contact with the bottom wall of the inner pot.
4. The rice cooker as described in claim 1, characterized in that, The gap between the outer and inner pots is ≥2mm; And / or, the opening of the inner pot is located above the interface between the lid and the pot body, and the distance between the opening of the outer pot and the interface is ≥8mm.
5. The rice cooker as described in claim 1, characterized in that, The cover includes an upper cover, an inner cover, and a cover plate assembly stacked sequentially. The second airflow channel is located between the inner cover and the cover plate assembly, and the exhaust port is located on the upper cover. The inner cover has an air guide nozzle that can create a chimney effect, and the air guide nozzle is connected to the exhaust port.
6. The rice cooker as described in claim 5, characterized in that, The cover plate assembly includes: A fixed cover is connected to the inner cover; A plate body, connected to the fixed cover, and positioned to cover the opening of the inner pot; and A sealing ring includes a fixed part and a sealing part connected together. The fixed part is fixed at the connection between the fixed cover and the plate, and the sealing part extends toward the inner pot side. When the lid is placed on the pot body, the sealing part deforms, and the sealing part can seal the opening of the inner pot with the plate body; The second airflow channel communicates with the first airflow channel via the outer annular surface of the sealing portion.
7. The rice cooker as described in claim 6, characterized in that, A gas guiding structure is formed on the surface where the fixed cover and the sealing part contact.
8. The rice cooker as described in claim 5, characterized in that, The cross-sectional area of the air guide nozzle is smaller than the cross-sectional area of the second airflow channel.
9. The rice cooker as described in claim 8, characterized in that, The air inlet is positioned close to the center of the cover. Furthermore, the projection of the vent on the top cover is located within the projection range of the steam valve of the rice cooker on the top cover.
10. The rice cooker according to any one of claims 1 to 9, characterized in that, The outer ring connecting the first airflow channel and the second airflow channel is also provided with a sealing element.