Spill-proof cooking utensil with stable structure

Abstract

The anti-overflow cooking utensil comprises a pot body and a pot cover, the pot cover is provided with a steam valve assembly and a cold air opening communicated with the outside, the steam valve assembly is provided with a mixing cavity and a steam exhaust opening communicated with the outside, and the steam valve assembly comprises a steam exhaust pipe communicated with a cooking cavity; the steam exhaust pipe comprises a steam inlet section and a steam outlet section bent relative to the steam inlet section, the steam outlet end of the steam outlet section is located in the mixing cavity, the steam outlet section is provided with a leading-in opening and a leading-in pipe communicated with the cold air opening and the leading-in opening, one end of the leading-in pipe abuts against the cold air opening, the other end of the leading-in pipe abuts against the steam outlet section, and reinforcing ribs are arranged at the inner corner of the bent position of the steam exhaust pipe. Strong support is provided for the steam outlet section through the back shore section, the structural strength and the deformation resistance of the steam outlet section are improved, and it is ensured that the steam outlet section cannot deform under the action of mixed impact of cold air and steam and the like.

Description

Technical Field

[0001] This application belongs to the field of kitchen utensil technology, specifically relating to a structurally stable spill-proof cooking utensil. Background Technology

[0002] When a rice cooker is cooking, heat is generated inside the cooking cavity, and the resulting steam is released through the steam vent on the lid. When cooking rice porridge or similar dishes, a lot of bubbles are produced. If the cooking heat is too high or continuous high heat is used, the bubbles, mixed with rice water, will overflow from the vent. This not only makes cleaning difficult but also, if the steam valve isn't cleaned promptly, the rice water at the vent will solidify, making cleaning even more difficult and potentially causing blockage and preventing steam from escaping. Using low heat to reduce heating power will result in longer cooking times, negatively impacting the user experience.

[0003] To prevent overflowing of cooking appliances during high-power cooking, existing technologies often incorporate bubble-breaking structures within steam valves to extend the steam flow path, such as baffles or bubble breakers. For example, existing bubble breakers often employ a bending design to maximize the steam flow path and achieve bubble breaking. However, the steam valve itself, including the bubble breaker, is made of injection-molded components with thin walls. The winding design easily leads to stress concentration at corners, and the impact of gas can cause the bubble breaker to bend and deform. This not only affects steam emission but also the sealing performance of the steam valve. Utility Model Content

[0004] This application provides a structurally stable anti-overflow cooking appliance to solve the technical problems of poor strength and instability of the anti-overflow and bubble-breaking structure in existing cooking appliances.

[0005] The technical solution adopted in this application is as follows:

[0006] A structurally stable anti-overflow cooking appliance includes a pot body with a cooking cavity and a pot lid for opening or closing the cooking cavity. The pot lid is provided with a steam valve assembly and a cold air vent communicating with the outside. The steam valve assembly has a mixing chamber and a steam vent communicating with the outside. The steam valve assembly includes a steam vent pipe communicating with the cooking cavity. The steam vent pipe includes a steam inlet section and a steam outlet section that bends relative to the steam inlet section. The steam outlet end of the steam outlet section is located inside the mixing chamber. The steam outlet section is provided with an inlet and an inlet pipe communicating with the cold air vent and the inlet. One end of the inlet pipe abuts against the cold air vent and the other end abuts against the steam outlet section. A reinforcing rib supporting the steam outlet section is provided at the inner corner of the bend of the steam vent pipe.

[0007] In this application, the steam outlet section of the exhaust pipe is bent compared to the steam inlet section. During cooking, the steam in the cooking chamber flows through the bend in the exhaust pipe before entering the steam outlet section from the steam inlet section. The bend obstructs and redirects the steam, breaking bubbles and increasing fluid dynamics, which helps in the liquefaction and condensation of the steam. Especially when cooking foods like rice porridge, the boiling in the cooking chamber pushes some rice grains or small food particles upwards into the steam inlet section. The bend obstructs and impacts these solid particles, causing them to fall back into the cooking chamber through the steam inlet of the steam inlet section. This significantly reduces the probability of the exhaust pipe becoming blocked, ensuring smooth steam discharge.

[0008] In this technical solution, the arrangement of the inlet pipe can guide the cold air from the cold air inlet to the inlet, allowing as much cold air as possible to enter the steam outlet section, thus aiding steam condensation and bubble breaking. One end of the inlet pipe abuts against the cold air inlet, and the other end abuts against the steam outlet section, achieving an internally concealed arrangement that helps maintain the uniformity of the boiler lid's appearance. However, this abutting design at both ends of the inlet pipe will exert some pressure on the steam outlet section. Furthermore, the relative bending design between the steam outlet and inlet sections will cause stress concentration at the bend where they connect. The inlet design on the steam outlet section will also cause significant impact from the introduction of external cold air, generating a torque that causes the steam outlet section to rotate away from the cold air inlet relative to the inlet section. These three factors combined will cause the steam outlet section to bend further relative to the inlet section, resulting in a deviation from the expected steam flow guidance effect of the exhaust pipe and a change in the position of the exhaust pipe within the steam valve, leading to problems such as seal failure. This application provides a reinforcing rib at the inner corner of the bend in the exhaust pipe to support the steam outlet section. The reinforcing rib can strengthen the structure of the steam outlet section, reduce the probability of deformation under bending stress, the force of the inlet pipe, and the impact of gas, and ensure that the steam can flow along the preset flow path.

[0009] The steam outlet section is further provided with a shrinkage section with a narrowing inner diameter, and the reinforcing rib has a top support section connected to the steam outlet section. The projection of the shrinkage section in the horizontal direction at least partially overlaps with the projection of the top support section in the horizontal direction.

[0010] The steam outlet section in this technical solution features a contraction section with a narrower inner diameter. This contraction section accelerates the steam flow before it reaches the cooking chamber, causing a pressure drop. This pressure and velocity change lead to a sudden shift in the surface tension of the steam bubbles, resulting in bubble breakage or the reduction of large bubbles into smaller ones. Furthermore, the pressure drop at the contraction section allows for the introduction of cold air from the outside through the cold air inlet, even without external power. According to the Venturi principle, this cold air further impacts the bubbles, not only defoaming but also cooling them and causing them to condense into liquid, further enhancing the defoaming effect. This ensures that even during high-power cooking, there will be no continuous bubble overflow from the steam valve assembly's exhaust port, significantly improving the anti-overflow performance of the cooking appliance.

[0011] Furthermore, the inclusion of a contraction section on the exhaust pipe in this technical solution, along with the placement of the exhaust pipe's outlet end within the mixing chamber, allows for multiple mixing processes between the steam and the low-temperature gas. Specifically, as the steam passes through the contraction section, the steam introduced through the exhaust pipe and the cold gas introduced through the cold gas inlet undergo their first mixing within the exhaust pipe, resulting in a certain reduction in the temperature of the high-temperature steam. After this first mixing, the steam exits through the outlet end into the mixing chamber. Because the mixing chamber has a larger space than the exhaust pipe, it allows for a second, more thorough mixing, further reducing the temperature of the high-temperature steam. Consequently, some of the high-temperature steam can liquefy to form condensate, reducing the water vapor content in the steam and ultimately minimizing the discharge of high-temperature steam from the exhaust port.

[0012] This technical solution provides strong support to the contraction section through the top support section, which improves the structural strength and deformation resistance of the steam outlet section. It ensures that the steam outlet section will not deform under the mixed impact of cold air and steam, as well as under the stress at the bend, so that the steam outlet section can be kept in the preset installation position, thus ensuring the smooth flow of steam.

[0013] The horizontal projection length of the top support section is at least half the horizontal projection length of the contraction section.

[0014] In this technical solution, the horizontal projections of the support section and the contraction section overlap significantly. This allows the support section to more effectively support the contraction section, further enhancing the overall structural strength of the steam outlet section. This ensures that the steam outlet section maintains a stable structural shape even under the combined impact of cold air and steam, preventing deformation and ensuring smooth steam flow. Furthermore, the longer overlap helps the support section distribute stress more evenly, preventing localized damage or deformation caused by excessive stress concentration. This is particularly effective in protecting the contraction section, further improving the deformation resistance of the steam outlet section.

[0015] The reinforcing rib also has a side support section connected to the steam inlet section, and a transition section connecting the side support section and the top support section. The transition section is fixedly connected to the inner corner of the bend in the exhaust pipe.

[0016] In this technical solution, the side support section is connected to the steam inlet section, the top support section is connected to the steam outlet section, and the transition section connects the side support section and the top support section, thus forming a stable support structure. This multi-directional support can effectively enhance the overall structural strength of the exhaust pipe, enabling it to maintain a stable structural shape even when subjected to airflow impact and stress. The synergistic effect of the side support section, top support section, and transition section allows the reinforcing ribs and exhaust pipe to better cooperate in bearing the force, improving the overall structural performance and ensuring that the exhaust pipe maintains a good and stable structural shape under various working conditions.

[0017] The steam inlet section, the steam outlet section, and the reinforcing rib are integrally formed.

[0018] In this technical solution, the one-piece molded structure integrates the steam inlet section, steam outlet section, and reinforcing ribs into a single unit, enabling them to collectively withstand various external forces, such as the impact of steam and cold air mixing, and stress at bends, thereby enhancing the strength and stability of the entire exhaust pipe structure. Furthermore, the one-piece molded structure eliminates gaps between adjacent components, reducing the possibility of steam leakage as it enters the mixing chamber from the exhaust pipe, ensuring smooth steam flow along a pre-defined path. Of course, the one-piece design also simplifies manufacturing processes and assembly procedures.

[0019] The steam valve assembly also has a reflux zone that connects the mixing chamber and the cooking chamber, the horizontal projection of the steam outlet section covers at least a portion of the reflux zone, and the horizontal projection of the reinforcing rib covers a portion of the reflux zone.

[0020] This technical solution, through the design of a reflux zone connecting the mixing chamber and the cooking chamber, allows slurry and condensate generated during steam flow due to bubble breaking and cooling to flow back into the cooking chamber. This prevents the mixing chamber from overflowing due to liquid accumulation at the vent, thus improving the overflow prevention effect of the cooking appliance. The horizontal projection of the steam outlet section covers at least a portion of the reflux zone, allowing slurry and condensate flowing from the steam outlet to drip smoothly into the reflux zone. The horizontal projection of the reinforcing ribs also covers a portion of the reflux zone, allowing liquid adhering to the outer surface of the steam outlet section due to bubble breaking and condensation during steam flow to drip smoothly into the reflux zone through the guidance of the reinforcing ribs as it flows downwards. This facilitates the collection and discharge of liquid from the mixing chamber within the reflux zone.

[0021] The reinforcing rib is provided with a flow-guiding surface that guides the steam from the steam outlet section to the recirculation zone.

[0022] This technical solution, by setting a drainage surface on the reinforcing rib, can further guide the liquid adhering to the outer circumference of the steam outlet section, allowing it to be accurately guided to the return zone, thereby improving the return efficiency and further enhancing the anti-overflow performance of the cooking appliance.

[0023] A sealing element is provided between the air inlet end of the inlet pipe and the air outlet end of the cold air port.

[0024] In this technical solution, a sealing element is sandwiched between the air inlet end of the inlet pipe and the air outlet end of the cold air port. On the one hand, it can prevent the steam in the mixing chamber from overflowing from the joint between the air inlet end of the inlet pipe and the cold air port, so that the steam is discharged from the exhaust port. This can prevent multiple leaks in the pot lid from giving users the illusion that the pot lid is faulty. On the other hand, it can prevent the cold air from overflowing into the mixing chamber when it is introduced from the cold air port, which would cause the cold air temperature to rise and affect the defoaming efficiency of the cold air after entering the contraction section. However, to ensure the sealing performance of the seal, sufficient pre-tightening force needs to be applied to the seal when connecting the inlet pipe to the cold air inlet after assembly. The stress during assembly will be transmitted to the exhaust pipe through the inlet pipe, thus providing the exhaust pipe with a torque that causes it to rotate downwards around the bend between the inlet and outlet sections. Therefore, the design of the top support section can provide sufficient support to the outlet section at this time, preventing the outlet section from rotating downwards under the action of the assembly force, which would weaken or eliminate the force applied to the seal by the inlet pipe. This ensures the sealing performance of the seal and ensures that both steam and cold air can flow along the preset flow path, thus guaranteeing the realization of the anti-overflow function.

[0025] The inlet pipe, the seal, and the exhaust pipe are integrally formed.

[0026] In this technical solution, the inlet pipe, sealing element, and exhaust pipe are integrally formed. On the one hand, this simplifies the manufacturing process and eliminates the assembly steps required for separate molding. On the other hand, it ensures the sealing performance between the inlet pipe and the sealing element, as well as the sealing performance between the inlet of the inlet pipe and the inlet of the exhaust pipe. This allows the cold air introduced from the outside and the steam entering the steam valve assembly from the cooking chamber to flow along the preset flow path.

[0027] The contraction section is provided with multiple inlets along its circumference. The cold air introduced by the cold air inlet is introduced into the contraction section through the multiple inlets, so that the steam introduced into the exhaust pipe and the cold air introduced from the cold air inlet are mixed in the steam outlet section and then discharged into the mixing chamber through the steam outlet end.

[0028] In this technical solution, the contraction section has multiple inlets along its circumference, allowing external cold air to be introduced into the contraction section through the cold air inlet and multiple inlets. This increases the amount of cold air introduced, thereby improving defoaming efficiency and cooling efficiency, and further enhancing the anti-overflow effect of the cooking appliance. Moreover, the design of multiple inlets ensures that the cold air mixes evenly with the steam, reducing turbulence and fluctuations during steam flow. This not only improves the stability of the steam discharge process but also helps to reduce exhaust noise, enhancing the user experience. Attached Figure Description

[0029] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0030] Figure 1 This is a cross-sectional view of the pot lid according to one embodiment of this application;

[0031] Figure 2 for Figure 1 The enlarged view of part A shows the general direction of steam flow indicated by the arrows.

[0032] Figure 3 This is a perspective view of the exhaust pipe according to one embodiment of this application;

[0033] Figure 4 This is a cross-sectional view of the exhaust pipe according to one embodiment of this application;

[0034] Figure 5 This is a side view of the exhaust pipe according to one embodiment of this application.

[0035] in,

[0036] 1. Mixing chamber;

[0037] 2. Exhaust pipe; 21. Steam inlet section; 22. Steam outlet section; 221. Contraction section; 222. Inlet; 23. Mounting base;

[0038] 3. Reinforcing ribs; 31. Top support section; 32. Side support section; 33. Transition section; 34. Drainage surface;

[0039] 4. Inlet pipe;

[0040] 5. Second sealing element;

[0041] 6. Valve cover; 61. Exhaust port; 62. Cold air inlet;

[0042] 7. First sealing element;

[0043] 8. Liner;

[0044] 9. Inner cover; 91. Reflux zone;

[0045] 10. Reflux valve;

[0046] 11. Cover. Detailed Implementation

[0047] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0048] Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0049] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0050] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0051] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0052] like Figure 1 , Figure 2 and Figure 4 As shown, a structurally stable anti-overflow cooking appliance includes a pot body with a cooking cavity and a pot lid for opening or closing the cooking cavity. The pot lid is provided with a steam valve assembly and a cold air vent 62 communicating with the outside. The steam valve assembly has a mixing chamber 1 and a steam vent 61 communicating with the outside. The steam valve assembly includes a steam vent pipe 2 communicating with the cooking cavity. The steam vent pipe 2 includes a steam inlet section 21 and a steam outlet section 22 that is bent relative to the steam inlet section 21. The steam outlet end of the steam outlet section 22 is located in the mixing chamber 1. The steam outlet section 22 is provided with an inlet 222 and an inlet pipe 4 communicating with the cold air vent 62 and the inlet 222. One end of the inlet pipe 4 abuts against the cold air vent 62 and the other end abuts against the steam outlet section 22. A reinforcing rib 3 supporting the steam outlet section 22 is provided at the inner corner of the bend of the steam vent pipe 2.

[0053] The steam valve assembly includes a valve cover 6. In one embodiment, the pot lid includes a top cover 11, a liner 8, and an inner cover 9. The cold air inlet is a through-hole located on the top cover, and the valve cover has a flow-through port opposite to this through-hole. External cold air is introduced into the interior of the steam valve assembly through the cold air inlet and the flow-through port. In another embodiment, such as... Figure 1 As shown, at least a portion of the top surface of the valve cover 6 is exposed to the cover 11, so that the valve cover 6 forms part of the outer surface of the pot lid. The cold air port 62 is provided on the valve cover 6 so that cold air from the outside can be directly introduced into the interior of the steam valve assembly through the cold air port 62.

[0054] In this application, the steam outlet section 22 of the exhaust pipe 2 is bent compared to the steam inlet section 21. During cooking, the steam in the cooking chamber flows through the bend in the exhaust pipe 2 before entering the steam outlet section 22 from the steam inlet section 21. The bend obstructs and redirects the steam, breaking bubbles and increasing fluid dynamics, which helps in the liquefaction and condensation of the steam. Especially when cooking rice soup or similar foods, the boiling in the cooking chamber pushes some rice grains or small food particles upwards into the steam inlet section. The bend obstructs and impacts these solid particles, causing them to fall back into the cooking chamber through the steam inlet of the steam inlet section. This significantly reduces the probability of the exhaust pipe 2 becoming blocked, ensuring smooth steam discharge.

[0055] In this technical solution, the arrangement of the inlet pipe 4 can guide the cold air from the cold air inlet 62 to the inlet 222, allowing as much cold air as possible to enter the steam outlet section 22, thus aiding in steam condensation and bubble breaking. One end of the inlet pipe 4 abuts against the cold air inlet 62, and the other end abuts against the steam outlet section 22, achieving a concealed arrangement of the inlet pipe 4, which helps to achieve a consistent appearance of the pot lid. However, the abutting design of both ends of the inlet pipe 4 will exert a certain pressure on the steam outlet section 22. Furthermore, the relative bending design of the steam outlet section 22 and the steam inlet section 21 will cause stress concentration at the bend where they connect. Additionally, the design of the inlet on the steam outlet section 22 will cause a significant impact when external cold air is introduced, resulting in a torque that causes the steam outlet section 22 to rotate relative to the steam inlet section 21 away from the cold air inlet 62. The aforementioned three factors cause the steam outlet section 22 to bend further relative to the steam inlet section 21, resulting in the steam exhaust pipe 2 deviating from its intended flow direction and causing a change in the position of the steam exhaust pipe 2 within the steam valve, leading to problems such as seal failure. This application provides a reinforcing rib 3 at the inner corner of the bend in the steam exhaust pipe 2. The reinforcing rib 3 structurally strengthens the steam outlet section 22, reducing the probability of deformation under bending stress, the resistance of the inlet pipe 4, and the impact of gas, ensuring that steam flows along the predetermined flow path.

[0056] As a preferred embodiment of this application, such as Figure 2 As shown, the steam outlet section 22 has a contraction section 221 with a narrowed inner diameter, and the reinforcing rib 3 has a top support section 31 connected to the steam outlet section 22. The projection of the contraction section 221 in the horizontal direction at least partially overlaps with the projection of the top support section 31 in the horizontal direction.

[0057] The steam outlet section 22 in this application is equipped with a contraction section 221 with a narrowing inner diameter. This allows the steam to flow faster at the contraction section 221 before reaching the cooking chamber from the exhaust pipe 2, resulting in a pressure drop. This pressure and flow rate change causes a sudden change in the surface tension of the bubbles, leading to bubble breaking or reducing the size of large bubbles. Furthermore, the pressure drop at the contraction section 221 allows cold air from the outside to be introduced into the contraction section 221 without external power. According to the Venturi principle, the cold air introduced into this low-pressure area further impacts the bubbles, not only defoaming but also cooling them and causing them to condense into liquid, further enhancing the defoaming effect. This ensures that even during high-power cooking, there will be no continuous bubble overflow at the steam outlet 61 of the steam valve assembly, significantly improving the anti-overflow effect of the cooking appliance.

[0058] Furthermore, in this embodiment, the setting of the contraction section 221 on the exhaust pipe 2, and the placement of the steam outlet end of the exhaust pipe 2 within the mixing chamber 1, allows the steam and low-temperature gas to mix multiple times. That is, when the steam passes through the contraction section 221, the steam introduced by the exhaust pipe 2 and the cold gas introduced by the cold gas inlet are mixed for the first time within the exhaust pipe 2, which reduces the temperature of the high-temperature steam to a certain extent. After the first mixing, the steam is discharged into the mixing chamber 1 through the steam outlet end. Because the space of the mixing chamber 1 is relatively larger than that of the exhaust pipe 2, a second, more thorough mixing can be achieved, which further reduces the temperature of the high-temperature steam. Consequently, some of the high-temperature steam can liquefy to form condensate, reducing the water vapor content in the steam and ultimately reducing the discharge of high-temperature steam from the exhaust port 61.

[0059] In addition, the top support section 31 provides strong support for the contraction section 221, which improves the structural strength and deformation resistance of the steam outlet section 22. This ensures that the steam outlet section 22 will not deform under the mixed impact of cold air and steam, as well as under the stress at the bend, so that the steam outlet section 22 can be kept in the preset installation position, thus ensuring the smooth flow of steam.

[0060] As a preferred embodiment of this application, such as Figure 1 As shown, the pot lid includes a liner 8 and an inner cover 9 detachably mounted on the liner 8. The steam valve assembly includes a valve cover 6 mounted on the liner 8. The valve cover 6 may also be integrally formed on the liner 8. The liner 8 and / or the valve cover 6 are provided with a first seal 7, which has a lower sealing lip capable of sealing against the upper surface of the inner cover 9. The valve cover 6, the first seal 7, and the inner cover 9 cooperate to form a mixing chamber 1. The exhaust pipe 2 is mounted on the inner cover 9 and can be removed from the liner 8 along with the inner cover 9, facilitating thorough cleaning of the inner cover 9 and the exhaust pipe 2 by the user. After the inner cover 9 is removed, the mixing chamber 1 can be directly exposed to the user's view, allowing for thorough cleaning of the inner wall of the mixing chamber 1 and preventing the accumulation of dirt and grime in the steam valve assembly, which could lead to bacterial growth. Furthermore, the exhaust pipe 2 is detachably mounted on the inner cover 9 for disassembly and cleaning.

[0061] Preferably, such as Figure 1As shown, the inner cover 9 is provided with a reflux hole and a reflux valve 10 that is floating on the inner cover 9 to open or close the reflux hole. When the pressure in the cooking chamber rises to a certain threshold, it can push the reflux valve 10 to float up to close the reflux hole and prevent steam from flowing back into the mixing chamber 1. When the pressure in the cooking chamber drops to a certain threshold, the reflux valve 10 falls down under its own weight and the weight of the liquid in the mixing chamber 1 to open the reflux hole, and the liquid accumulated in the mixing chamber 1 falls back into the cooking chamber through the reflux hole. Furthermore, a part of the inner cover 9 is sunken to form a liquid collection tank communicating with the mixing chamber 1, so that the mixing chamber 1 can collect condensate and soup that falls back after the bubbles are broken. The reflux hole is located on the bottom wall of the liquid collection tank to facilitate liquid reflux.

[0062] In a preferred embodiment of this application, the horizontal projection length of the top support section 31 is at least half the horizontal projection length of the contraction section 221. The horizontal projections of the top support section 31 and the contraction section 221 overlap significantly, allowing the top support section 31 to more effectively support the contraction section 221. This further enhances the overall structural strength of the steam outlet section 22, enabling it to maintain a stable structural shape even under the combined impact of cold air and steam, preventing deformation and ensuring smooth steam flow. Furthermore, the longer overlap helps the top support section 31 distribute stress more evenly, preventing localized damage or deformation of the steam outlet section 22 due to excessive stress concentration. This provides particularly better protection for the contraction section 221, further improving the deformation resistance of the steam outlet section 22.

[0063] As a preferred embodiment of this application, such as Figures 3 to 5 As shown, the reinforcing rib 3 also has a side support section 32 connected to the steam inlet section 21, and a transition section 33 connecting the side support section 32 and the top support section 31. The transition section 33 is fixedly connected to the inner corner of the bend in the exhaust pipe 2. The side support section 32 is connected to the steam inlet section 21, the top support section 31 is connected to the steam outlet section 22, and the transition section 33 connects the side support section 32 and the top support section 31, thus forming a stable support structure. This multi-directional support can effectively enhance the overall structural strength of the exhaust pipe 2, enabling it to maintain a stable structural shape even when subjected to airflow impact and stress. The synergistic effect of the side support section 32, the top support section 31, and the transition section 33 allows the reinforcing rib 3 and the exhaust pipe 2 to better cooperate in bearing the force, improving the stress performance of the entire structure and ensuring that the exhaust pipe 2 maintains a good and stable structural shape under various working conditions.

[0064] In one embodiment, such as Figure 3 and Figure 4As shown, one end of the transition section 33 connects to the inner corner of the exhaust pipe 2 and extends extensively away from the inner corner to further enhance the overall structural strength of the reinforcing rib 3, thereby strengthening the structure of the exhaust pipe 2. In another embodiment not shown, there is a gap between one end of the transition section 33 and the inner corner of the exhaust pipe 2, forming a hollow area enclosed by the reinforcing rib 3 and the exhaust pipe 2, while the other end of the transition section 33 extends extensively away from the inner corner.

[0065] As a preferred embodiment of this implementation, such as Figure 1 , Figure 3 and Figure 4 As shown, the bottom end of the exhaust pipe 2 is provided with a mounting base 23, and the exhaust pipe 2 is mounted to the pot lid through the mounting base 23. The bottom end of the side support section 32 is fixedly connected to the mounting base 23. In this embodiment, the mounting base 23 provides a stable support foundation for the exhaust pipe 2 and the side support section 32, making the installation of the exhaust pipe 2 and the side support section 32 on the pot lid more secure and reducing the possibility of loosening or deformation caused by external forces. Moreover, the fixed connection between the bottom end of the side support section 32 and the mounting base 23 can effectively transfer the stress on the exhaust pipe 2 and the side support section 32 to the mounting base 23 and the pot lid, so that the stress is dispersed and deformation of the exhaust pipe 2 or the side support section 32 caused by stress concentration is avoided, thus improving the reliability and durability of the structure.

[0066] In one specific implementation, the inner cover 9 is provided with an installation port that is adapted to the mounting base 23, and the mounting base 23 is provided with a slot. The mounting base 23 is fixed to the installation port of the inner cover 9 by the slot.

[0067] In one embodiment, the exhaust pipe 2 and the reinforcing rib 3 are separately formed structures, and then fixed together by snap-fitting, adhesive, or other methods. In a preferred embodiment, the steam inlet section 21, the steam outlet section 22, and the reinforcing rib 3 are integrally formed structures. This integral structure allows the steam inlet section 21, the steam outlet section 22, and the reinforcing rib 3 to form a whole, capable of jointly withstanding various external forces, such as the mixing impact of steam and cold air, and stress at bends, thereby improving the strength and stability of the entire exhaust pipe 2 structure. Moreover, the integral structure avoids gaps between adjacent components, thereby reducing the possibility of steam leakage when entering the mixing chamber 1 from the exhaust pipe 2, allowing the steam to flow along a preset flow path and ensuring smooth exhaust. Of course, the integral design of the three components also simplifies the manufacturing process and assembly procedures.

[0068] As a preferred embodiment of this application, such as Figure 1 and Figure 2As shown, the steam valve assembly also has a reflux zone 91 that connects the mixing chamber 1 and the cooking chamber. The horizontal projection of the steam outlet section 22 covers at least a portion of the reflux zone 91, and the horizontal projection of the reinforcing rib 3 covers a portion of the reflux zone 91. The reflux zone 91 is provided with a reflux hole and a reflux valve 10 that is floatingly disposed on the inner cover 9 to open or close the reflux hole. By designing the reflux zone 91 that connects the mixing chamber 1 and the cooking chamber, slurry, condensate, etc., generated during steam flow due to defoaming and cooling can be returned to the cooking chamber through the reflux zone 91, preventing the mixing chamber 1 from overflowing from the steam outlet 61 due to liquid accumulation, thus improving the anti-overflow effect of the cooking appliance. The horizontal projection of the steam outlet section 22 covers at least a portion of the reflux zone 91, allowing slurry, condensate, and other liquids flowing from the steam outlet end of the steam outlet section 22 to drip smoothly into the reflux zone 91. The horizontal projection of the reinforcing rib 3 covers a portion of the reflux zone 91, allowing liquids adhering to the outer circumference of the steam outlet section 22 due to bubble breaking and condensation during steam flow to drip smoothly into the reflux zone 91 through the guidance of the reinforcing rib 3 during downward flow. This facilitates the collection and discharge of liquids in the mixing chamber 1 by the reflux zone 91.

[0069] Furthermore, such as Figure 2 As shown, the reinforcing rib 3 is provided with a flow-guiding surface 34 that guides the liquid from the steam outlet section 22 to the return flow zone 91. By providing the flow-guiding surface 34 on the reinforcing rib 3, the liquid adhering to the outer circumference of the steam outlet section 22 can be further guided to the return flow zone 91, thereby improving the return flow efficiency and further enhancing the anti-overflow performance of the cooking appliance.

[0070] As a preferred embodiment of this application, such as Figure 2As shown, a second sealing element 5 is sandwiched between the air inlet end of the inlet pipe 4 and the air outlet end of the cold air port 62. In this embodiment, the second sealing element 5 sandwiched between the air inlet end of the inlet pipe 4 and the air outlet end of the cold air port 62 can prevent steam in the mixing chamber 1 from overflowing from the joint between the air inlet end of the inlet pipe 4 and the cold air port 62, so that all steam is discharged from the exhaust port 61. This can prevent multiple leaks in the pot lid from giving users the illusion that the pot lid is faulty, and can also prevent cold air from overflowing into the mixing chamber 1 when it is introduced from the cold air port 62, which would cause the cold air temperature to rise and affect the defoaming efficiency of the cold air after entering the contraction section 221. However, to ensure the sealing performance of the second seal 5, after assembly, the connection between the inlet pipe 4 and the cold air port 62 requires sufficient pre-tightening force for the second seal 5. The stress during assembly will be transmitted to the exhaust pipe 2 through the inlet pipe 4, thereby providing the exhaust pipe 2 with a torque that rotates downward around the bend between the steam inlet section 21 and the steam outlet section 22. Therefore, the design of the top support section 31 can provide sufficient support to the steam outlet section 22 at this time, preventing the steam outlet section 22 from rotating downward under the action of the assembly force, which would weaken or eliminate the force applied to the second seal 5 by the inlet pipe 4. This ensures the sealing performance of the second seal 5, ensuring that both steam and cold air can flow according to the preset flow path, and guaranteeing the realization of the anti-overflow function.

[0071] As one embodiment of this implementation, the inlet pipe 4 and the exhaust pipe 2 are integrally formed, while the second sealing member 5 and the inlet pipe 4 are separately formed. One end of the inlet pipe 4 is provided with an abutting part for abutting the second sealing member 5 against the outlet end of the cold air port 62.

[0072] In a preferred embodiment of this invention, the inlet pipe 4, the second seal 5, and the exhaust pipe 2 are integrally formed. This integral forming simplifies the manufacturing process, eliminating the assembly steps required for separate molding. Furthermore, it ensures the sealing performance between the inlet pipe 4 and the second seal 5, as well as between the inlet pipe 4 and the inlet 222 of the exhaust pipe 2. This allows both the cold air introduced from the outside and the steam entering the steam valve assembly from the cooking chamber to flow along a preset flow path.

[0073] In a preferred embodiment of this application, the contraction section 221 is provided with multiple inlets 222 along its circumference. Cold air introduced from the cold air inlet 62 is introduced into the contraction section 221 through these inlets 222, allowing the steam from the exhaust pipe 2 to mix with the cold air introduced from the cold air inlet 62 within the steam outlet section 22 before being discharged into the mixing chamber 1 through the steam outlet end. The multiple inlets 222 along the circumference of the contraction section 221 allow external cold air to be introduced into the contraction section 221 through the cold air inlet 62 and the multiple inlets 222, increasing the amount of cold air introduced, thereby improving defoaming efficiency and cooling efficiency, and further enhancing the anti-overflow effect of the cooking appliance. Moreover, the design of multiple inlets 222 allows the cold air to mix evenly with the steam, reducing turbulence and fluctuations during steam flow, which not only improves the stability of the steam discharge process but also helps reduce exhaust noise, enhancing the user experience. The addition of inlet 222 will further improve the amount and efficiency of cold air introduction. As a result, during the application of the steam valve assembly, the cold air from the outside will have a greater impact on the steam outlet section 22 when it is introduced. In this embodiment, the design of the reinforcing rib 3, especially the top support section 31, can play a role in structural reinforcement of the steam outlet section 22, reduce its deformation under the mixed impact of cold air and steam, and improve the stability of the structure performance of the exhaust pipe 2.

[0074] Preferably, the inlets 222 are spaced apart and evenly distributed along the circumference of the contraction section 221. This arrangement allows for a more uniform impact force on the steam outlet section 22 when cold air is introduced, avoiding structural deformation caused by localized stress concentration.

[0075] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0076] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0077] The above descriptions are merely embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A structurally stable spilling-preventing cooking appliance comprising a pot body having a cooking cavity and a pot cover for opening or closing the cooking cavity, characterized in that, The pot lid is equipped with a steam valve assembly and a cold air vent that communicates with the outside. The steam valve assembly has a mixing chamber and a steam vent that connects the mixing chamber to the outside. The steam valve assembly includes a steam vent pipe that communicates with the cooking chamber. The steam vent pipe includes a steam inlet section and a steam outlet section that bends relative to the steam inlet section. The steam outlet end of the steam outlet section is located inside the mixing chamber. The steam outlet section has an inlet and an inlet pipe that connects the cold air vent and the inlet. One end of the inlet pipe abuts against the cold air vent, and the other end abuts against the steam outlet section. A reinforcing rib supporting the steam outlet section is provided at the inner corner of the bend in the steam vent pipe.

2. The structurally stable anti-overflow cooking appliance according to claim 1, characterized in that, The steam outlet section is further provided with a shrinkage section with a narrowing inner diameter, and the reinforcing rib has a top support section connected to the steam outlet section. The projection of the shrinkage section in the horizontal direction at least partially overlaps with the projection of the top support section in the horizontal direction.

3. The structurally stable spill-proof cooking appliance according to claim 2, characterized in that, The horizontal projection length of the top support section is at least half the horizontal projection length of the contraction section.

4. The structurally stable anti-overflow cooking appliance according to claim 2, characterized in that, The reinforcing rib also has a side support section connected to the steam inlet section, and a transition section connecting the side support section and the top support section. The transition section is fixedly connected to the inner corner of the bend in the exhaust pipe.

5. A structurally stable anti-overflow cooking appliance according to claim 1, characterized in that, The steam inlet section, the steam outlet section, and the reinforcing rib are integrally formed.

6. A structurally stable spill-proof cooking appliance according to claim 1, characterized in that, The steam valve assembly also has a reflux zone that connects the mixing chamber and the cooking chamber, the horizontal projection of the steam outlet section covers at least a portion of the reflux zone, and the horizontal projection of the reinforcing rib covers a portion of the reflux zone.

7. A structurally stable anti-overflow cooking appliance according to claim 6, characterized in that, The reinforcing rib is provided with a flow-guiding surface that guides the steam from the steam outlet section to the recirculation zone.

8. A structurally stable spill-proof cooking appliance according to claim 1, characterized in that, A sealing element is provided between the air inlet end of the inlet pipe and the air outlet end of the cold air port.

9. A structurally stable anti-overflow cooking appliance according to claim 8, characterized in that, The inlet pipe, the seal, and the exhaust pipe are integrally formed.

10. A structurally stable anti-overflow cooking appliance according to claim 2, characterized in that, The contraction section is provided with multiple inlets along its circumference. The cold air introduced by the cold air inlet is introduced into the contraction section through the multiple inlets, so that the steam introduced into the exhaust pipe and the cold air introduced from the cold air inlet are mixed in the steam outlet section and then discharged into the mixing chamber through the steam outlet end.

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