Cooking utensil

Abstract

The utility model relates to a cooking utensil. The cooking utensil comprises a pot cover assembly. The pot cover assembly comprises a pot cover, a switching assembly and a steam exhaust hole. The pot body is connected with the pot cover, a cooking cavity is formed in the pot body, and the pot cover assembly covers the cooking cavity; the switching assembly comprises a first sealing part and a pressure limiting part, the first sealing part is movable, the first sealing part can be switched back and forth between a first position and a second position, under the condition of the first position, the first sealing part closes the steam exhaust hole to seal the cooking cavity, and under the condition of the second position, the first sealing part closes the steam exhaust hole to seal the cooking cavity. The first sealing piece opens the steam exhaust hole, so that the cooking cavity is communicated with the outside through the steam exhaust hole; the pressure limiting piece is configured to enable the cooking cavity to be communicated with the outside of the cooking cavity under the condition that the pressure in the cooking cavity is larger than the safety pressure. According to the cooking utensil, the pressure cooking mode and the non-pressure cooking mode of the cooking utensil can be achieved, and meanwhile when the pressure in the cooking cavity is larger than the safety pressure, the pressure limiting piece can enable the cooking cavity to relieve pressure.

Description

Technical Field

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

[0002] Currently, to enrich existing cooking scenarios, cooking appliances have switching components that allow them to switch between pressurized and unpressurized cooking modes. Furthermore, to ensure cooking safety, these appliances typically include safety valves for pressure limiting. However, such cooking appliances have relatively low integration levels. Utility Model Content

[0003] This utility model provides a cooking appliance to solve at least one of the above-mentioned technical problems.

[0004] One embodiment of the present invention includes a cooking appliance comprising:

[0005] A pot lid assembly, comprising a pot lid, a switching component, and a steam vent, wherein the switching component is disposed on the pot lid;

[0006] A pot body, the pot body being connected to the pot lid, a cooking cavity being formed inside the pot body, and the pot lid assembly covering the cooking cavity;

[0007] The switching component includes a first seal and a pressure limiting member. The first seal can switch back and forth between a first position and a second position. In the first position, the first seal closes the vent hole to seal the cooking chamber. In the second position, the first seal opens the vent hole to allow the cooking chamber to communicate with the outside of the cooking chamber through the vent hole.

[0008] The pressure limiting component is configured to connect the cooking cavity to the outside world when the pressure inside the cooking cavity is greater than the safe pressure.

[0009] In the aforementioned cooking appliance, on the one hand, the switching component can open and close the vent hole through the movable first seal to realize the pressure cooking mode and the pressureless cooking mode of the cooking appliance. On the other hand, the pressure limiting component is configured to connect the cooking cavity with the outside of the cooking cavity when the pressure inside the cooking cavity is greater than the safety pressure. Thus, when the pressure inside the cooking cavity is low, the cooking appliance can work normally. When the pressure inside the cooking cavity is greater than the safety pressure, the pressure limiting component can release the pressure in the cooking cavity, which ensures the safety of the cooking appliance to a certain extent and also improves the integration of the cooking appliance.

[0010] In some embodiments, the vent area of ​​the vent hole is configured to enable pressureless cooking when the vent hole is open. In some embodiments, the pressure limiting member includes an elastic member connected to the first seal. The elastic member is configured to provide a force to the first seal that engages with the steam outlet or inlet of the vent hole, and, when the pressure inside the cooking chamber exceeds a safe pressure, to allow the first seal to be lifted by the pressure inside the cooking chamber, thereby connecting the cooking chamber to the outside through the vent hole.

[0011] In some embodiments, the switching assembly includes a housing fixed to the pot lid, and a receiving cavity provided inside the housing. The first sealing member and the elastic member are disposed in the receiving cavity, and the elastic member abuts against the first sealing member and the housing, respectively.

[0012] In some embodiments, the switching assembly includes a second seal disposed within the accommodating cavity, the first seal and the second seal being movably connected, and the second seal having the vent hole;

[0013] The second seal includes a first contact plane, and the first seal includes a second contact plane, wherein the first contact plane and the second contact plane are parallel to and in contact with each other;

[0014] The switching component is configured to close the vent hole to seal the cooking chamber by means of close contact between the first contact plane and the second contact plane when the second seal and the first seal move relative to each other, and to open the vent hole to allow the cooking chamber to communicate with the outside of the cooking chamber through the vent hole.

[0015] In some embodiments, the first seal and the second seal are sheet-like structures.

[0016] In some embodiments, the first seal is capable of planar movement relative to the second seal on the first contact plane, and the opening of the vent hole on the first contact plane is located on the movement path of the first seal.

[0017] In some embodiments, the switching assembly is configured such that the first seal and the second seal can move relative to each other to adjust the opening area of ​​the vent hole.

[0018] In some embodiments, the switching assembly includes an operating valve core and a sealing gasket. The two ends of the receiving cavity are respectively provided with a first opening and a second opening. The sealing gasket is disposed in the first opening. The switching assembly is sealed to the surface of the pot lid away from the cooking cavity through the sealing gasket. The operating valve core extends into the receiving cavity through the second opening and is connected to the first sealing element. The elastic element abuts between the operating valve core and the first sealing element.

[0019] In some embodiments, one of the first sealing element and the operating valve core is provided with a first limiting groove, and the other is provided with a first limiting block. The first limiting block and the first limiting groove are connected in a clearance fit so that when the operating valve core moves, the first sealing element is driven to move through the cooperation of the first limiting block and the first limiting groove.

[0020] In some embodiments, the pressure limiting member includes the sealing gasket, which includes a body and a flange. The flange is disposed on one end of the body near the cooking cavity. The receiving cavity has a receiving groove on its side wall near the first opening. The flange is embedded in the receiving groove. The flange is configured to deform when the pressure inside the cooking cavity is greater than the safe pressure, so that the cooking cavity is connected to the outside of the cooking cavity.

[0021] In some embodiments, the first seal and the second seal are stacked in the height direction of the cooking appliance, and the elastic member keeps the first seal and the second seal relatively stationary in the height direction of the cooking appliance when the pressure in the cooking cavity does not exceed the safety pressure.

[0022] In some embodiments, the switching component includes a first component and a second component. The first component is provided with a limiting rib, and the second component is provided with a third limiting groove. The limiting rib is embedded in the third limiting groove to limit the relative position of the first component and the second component. The pressure limiting member includes the limiting rib. The limiting rib is configured to rupture when the pressure in the cooking cavity is greater than the safe pressure, thereby connecting the cooking cavity to the outside of the cooking cavity.

[0023] In some embodiments, the cooking appliance satisfies at least one of the following: the steam vent area is greater than or equal to 19.5 mm. 2 And less than or equal to 314mm 2 ;

[0024] The second seal and the first seal are made of hard material, and the Vickers hardness of the hard material is greater than or equal to 50HV5;

[0025] The surface roughness of the first contact plane is no greater than 3.2 micrometers, and the flatness is no greater than 3.2 micrometers; the surface roughness of the second contact plane is no greater than 3.2 micrometers, and the flatness is no greater than 3.2 micrometers.

[0026] Additional aspects and advantages of the embodiments of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] The above and / or additional aspects and advantages of this invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0028] Figure 1 This is a cross-sectional schematic diagram of the cooking utensil according to an embodiment of the present utility model;

[0029] Figure 2 This is an exploded view of the pot lid assembly according to an embodiment of the present invention.

[0030] Figure 3 This is an exploded view of the switching component according to an embodiment of the present invention;

[0031] Figure 4 This is a cross-sectional schematic diagram of the cooking appliance according to an embodiment of the present invention, showing that the pressure in the cooking cavity is less than or equal to the safe pressure.

[0032] Figure 5 This is a cross-sectional schematic diagram of the cooking appliance according to an embodiment of the present invention, showing that the pressure inside the cooking cavity is greater than the safe pressure;

[0033] Figure 6 This is a schematic diagram of the shell structure according to an embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of the structure of the operating valve core according to an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the structure of the first sealing element according to an embodiment of the present invention;

[0036] Figure 9 This is a schematic diagram showing the connection between the first sealing element and the operating part in an embodiment of this utility model;

[0037] Figure 10 This is a schematic diagram of the structure of the second sealing element according to an embodiment of the present invention;

[0038] Figure 11 This is a schematic diagram of the structure of the first and second sealing elements under pressure according to an embodiment of the present invention;

[0039] Figure 12 This is a schematic diagram of the structure of the first and second sealing elements under pressure switching conditions according to an embodiment of the present invention;

[0040] Figure 13 This is a schematic diagram of the structure of the first and second sealing elements in a pressureless state according to an embodiment of the present invention;

[0041] Figure 14 This is another structural schematic diagram of the first and second sealing elements under pressure in an embodiment of this utility model;

[0042] Figure 15 This is another structural schematic diagram of the first and second sealing elements in the pressure switching state according to an embodiment of the present invention;

[0043] Figure 16 This is another structural schematic diagram of the first and second sealing elements in a pressureless state according to an embodiment of this utility model;

[0044] Figure 17 This is another structural schematic diagram of the first and second sealing elements under pressure in an embodiment of the present invention.

[0045] Figure 18 This is another structural schematic diagram of the first and second sealing elements in a pressureless state according to an embodiment of the present invention.

[0046] Figure 19 This is a diagram showing the relationship between the exhaust area of ​​the exhaust hole and the power of the cooking appliance in an embodiment of this utility model.

[0047] Explanation of key figure labels:

[0048] Second seal - 11, First seal - 14, Exhaust port - 17, Notch - 23, Second contact surface - 29, First contact surface - 26, Housing - 32, Sealing gasket - 35, Receiving cavity - 38, First opening - 41, Second opening - 43, Second limiting groove - 46, Second limiting block - 49, Operating valve core - 52, Operating part - 58, First limiting groove - 76, First limiting block - 79, Steam inlet -82, Steam outlet -85, Steam vent -109, Elastic element -112, Pressure limiting element -115, Flange -118, Body -121, Through hole -124, Receiving groove -127, Fixing part -88, Fixing post -91, Mounting hole -94, Fastener -97, First guide part -106, Switching assembly -150, Pot body -200, Cooking cavity -250, Pot lid -300, Pot lid assembly -400.

[0049] Cooking utensils - 500. Detailed Implementation

[0050] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0051] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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 utility model. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0052] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0053] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0054] This disclosure provides many different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described herein. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0055] Please see Figure 1 The present invention provides a cooking appliance 500 including a lid assembly 400 and a pot body 200. The lid assembly 400 includes a lid 300, a switching assembly 150, and a steam vent 17. The pot body 200 is connected to the lid 300, and a cooking cavity 250 is formed inside the pot body 200. The lid 300 covers the cooking cavity 250. The switching assembly 150 includes a first sealing member 14 and a pressure limiting member 115. The first sealing member 14 can switch back and forth between a first position and a second position. In the first position, the first sealing member 14 closes the steam vent 17 to seal the cooking cavity 250. In the second position, the first sealing member 14 opens the steam vent 17 to allow the cooking cavity 250 to communicate with the outside through the steam vent 17. The pressure limiting member 115 is configured to connect the cooking cavity 250 with the outside when the pressure inside the cooking cavity 250 is greater than a safe pressure.

[0056] In the aforementioned cooking appliance 500, on the one hand, the switching component 150 can open and close the vent 17 through the movable first seal 14 to realize the pressurized cooking mode and the pressureless cooking mode of the cooking appliance 500. On the other hand, the pressure limiting component 115 is configured to connect the cooking cavity 250 with the outside world when the pressure in the cooking cavity 250 is greater than the safe pressure. Thus, when the pressure in the cooking cavity 250 is low, the cooking appliance 500 can work normally, and when the pressure in the cooking cavity 250 is greater than the safe pressure, the pressure limiting component 115 can release the pressure in the cooking cavity 250, which ensures the safety of the cooking appliance 500 to a certain extent and also improves the integration of the cooking appliance 500.

[0057] Specifically, the cooking appliance 500 can operate in both pressurized cooking mode and pressureless cooking mode. In pressurized cooking mode, the switching component 150 can close the vent 17, sealing the cooking chamber 250, thereby allowing pressurized cooking of the food. In pressureless cooking mode, the switching component 150 can fully open the vent 17, connecting the cooking chamber 250 to the outside environment, thereby allowing pressureless cooking of the food.

[0058] It should be noted that the pressureless cooking described in this invention refers to cooking appliances 500 operating at a pressure of less than or equal to 4 kPa within the cooking chamber 250. The venting area of ​​the vent 17 is configured such that, when the vent 17 is open, the cooking appliance 500 can achieve pressureless cooking. The venting area of ​​the vent 17 can be understood as the opening area of ​​the vent 17. In one embodiment, when the vent 17 is fully open, the entire venting area of ​​the vent 17 is used for venting steam, enabling the cooking appliance 500 to achieve pressureless cooking. In another embodiment, when the vent 17 is partially open, a portion of the venting area of ​​the vent 17 can be used for venting steam, enabling the cooking appliance 500 to achieve pressureless cooking.

[0059] When the vent 17 is opened to a certain size (fully or partially), the vent area of ​​the vent 17, which enables pressureless cooking by the cooking appliance 500, is related to the power of the cooking appliance 500. Generally, the higher the power of the cooking appliance 500, the larger the vent area of ​​the vent 17 required for pressureless cooking. The vent area of ​​the vent 17 corresponding to pressureless cooking at a certain power of the cooking appliance 500 can be determined through simulation, testing, and empirical values. In some examples, please refer to... Figure 19 , Figure 19 The relationship between the exhaust area of ​​the vent 17 and the power of the cooking appliance 500 is shown under pressureless cooking (pressure of 4 kPa in the cooking chamber 250).

[0060] Cooking appliances 500 include, but are not limited to, pressure cookers, electric pressure cookers, pressure slow cookers, etc. Please refer to... Figure 1 The cooking appliance 500 includes a lid 300, a pot body 200, and a cooking cavity 250. When the lid 300 and the pot body 200 are closed, they fit tightly together via a sealing ring, forming a relatively enclosed cooking cavity 250. When the vent 17 is closed and the cooking appliance 500 begins to operate, the food inside the cooking cavity 250 is heated, the water inside the cooking cavity 250 begins to evaporate, and the amount of steam gradually increases, causing the pressure inside the cooking cavity 250 to gradually rise. Because the cooking cavity 250 is sealed at this time, the steam cannot escape from the cooking appliance 500, resulting in the pressure inside the cooking cavity 250 being maintained. This raises the boiling point of the water, thereby accelerating the cooking process.

[0061] To provide more cooking options and flexibility to meet different ingredients and cooking needs, the cooking appliance 500 achieves both pressurized and non-pressurized cooking modes via a switching component 150. In related technologies, pressure cookers typically include a safety valve or other pressure-limiting device to control internal pressure, prevent excessive pressure, and ensure cooking safety. However, most pressure cookers generally have low integration, with the pressure-limiting device and switching component operating independently, resulting in complex structures, higher costs, increased size, and greater maintenance difficulty.

[0062] In this embodiment of the invention, the switching assembly 150 includes a first sealing member 14 and a pressure limiting member 115. The first sealing member 14 is movable. The first sealing member 14 can switch back and forth between a first position and a second position. In the first position, the first sealing member 14 closes the vent hole 17 to seal the cooking chamber 250. At this time, when the pressure inside the cooking chamber 250 is greater than the safe pressure, the pressure limiting member 115 connects the cooking chamber 250 to the outside.

[0063] The safe pressure is related to the rated pressure of the cooking appliance (500) and the area of ​​the surface area. Specifically, the safe pressure can be 5 to 6 times the rated pressure, and the safe pressure for a certain area is the safe pressure multiplied by the area of ​​that area.

[0064] In this embodiment of the invention, under pressurized cooking mode, the pressure limiting member 115 can be fitted onto the steam outlet 85 of the steam vent 17. The steam vent 17 corresponds to a steam vent area S(m²). 2 The pressure exerted on the portion of the pressure-limiting component 115 with area S within the cooking cavity 250 is the pressure within the cooking cavity 250 multiplied by S. The safe pressure is the safe pressure multiplied by S, where the safe pressure can be 5 to 6 times the rated pressure. In one example, if the rated pressure of the cooking appliance 500 is 70 kPa, then the safe pressure is 350 to 420 kPa, and the safe pressure is 350 × S to 420 × S kN.

[0065] In some embodiments, the vent area of ​​the vent 17 is configured such that when the vent 17 is open, the cooking appliance 500 can achieve pressureless cooking. Thus, the vent area can meet the venting requirements of the cooking appliance 500 in pressureless cooking mode, thereby enabling pressureless cooking without reducing the power of the cooking appliance 500 and improving the user experience.

[0066] Specifically, the cooking appliance 500 can operate in both pressurized cooking mode and pressureless cooking mode. In pressurized cooking mode, the switching component 150 can close the vent 17, sealing the cooking chamber 250, thereby allowing pressurized cooking of the food. In pressureless cooking mode, the switching component 150 can fully open the vent 17, connecting the cooking chamber 250 to the outside environment, thereby allowing pressureless cooking of the food.

[0067] It should be noted that the pressureless cooking described in this invention refers to cooking appliances 500 operating at a pressure of less than or equal to 4 kPa within the cooking chamber 250. The venting area of ​​the vent 17 is configured such that, when the vent 17 is open, the cooking appliance 500 can achieve pressureless cooking. The venting area of ​​the vent 17 can be understood as the opening area of ​​the vent 17. In one embodiment, when the vent 17 is fully open, the entire venting area of ​​the vent 17 is used for venting steam, enabling the cooking appliance 500 to achieve pressureless cooking. In another embodiment, when the vent 17 is partially open, a portion of the venting area of ​​the vent 17 can be used for venting steam, enabling the cooking appliance 500 to achieve pressureless cooking.

[0068] When the vent 17 is opened to a certain size (fully or partially), the vent area of ​​the vent 17, which enables pressureless cooking by the cooking appliance 500, is related to the power of the cooking appliance 500. Generally, the higher the power of the cooking appliance 500, the larger the vent area of ​​the vent 17 required for pressureless cooking. The vent area of ​​the vent 17 corresponding to pressureless cooking at a certain power of the cooking appliance 500 can be determined through simulation, testing, and empirical values. In some examples, please refer to... Figure 15 , Figure 15 The relationship between the exhaust area of ​​the vent 17 and the power of the cooking appliance 500 is shown under pressureless cooking (pressure of 4 kPa in the cooking chamber 250).

[0069] Most pressure cookers with a pressure-free cooking mode achieve this by using a mechanism to open the existing gravity vent valve (such as a gravity hammer or gravity valve) during pressure-free cooking, separating the gravity vent valve from the vent valve core. Steam is then released through the vent channel in the vent valve core to achieve pressure-free cooking. However, because the vent channel area of ​​cooking appliances is very small, the amount of steam released is insufficient. Achieving pressure-free cooking would significantly reduce cooking power to prevent the generation of excessive steam that cannot be released in time to build up pressure, thus greatly prolonging cooking time and resulting in a poor user experience. If the vent channel area were directly increased, considering the need to seal the vent channel under high pressure, the weight and volume of the gravity vent valve would also increase significantly, making operation and switching difficult and hindering productization. Therefore, existing cooking appliances either cannot perform pressure-free cooking or have very low power for pressure-free cooking, and cannot maintain a pressure-free state with slightly higher power.

[0070] In this embodiment of the invention, the steam vent 17 of the pot lid assembly 400 has a steam vent area that can meet the steam venting requirements of the cooking appliance 500 in the pressureless cooking mode, thereby enabling pressureless cooking without reducing the power of the cooking appliance 500 and improving the user experience.

[0071] The venting area of ​​the vent 17 is S, and the upper limit of S can be determined based on factors such as the space configuration of the lid assembly 400, cost, and cooking requirements. In one example, the cooking appliance 500 has a power of 2.2kW. The second seal 11 is provided with at least one vent 17, and the venting area S of the vent 17 is greater than 12.9mm². 2 This ensures that the internal pressure can be effectively controlled during the cooking process of the cooking appliance 500.

[0072] When the exhaust port 17 is a single port, the exhaust area S of the exhaust port 17 is greater than or equal to 12.9 mm. 2 When there are multiple exhaust ports 17 (two or more), the total exhaust area S of all exhaust ports 17 is greater than or equal to 12.9 mm. 2 The exhaust area of ​​each vent 17 can be the same or different, and is not specifically limited here. This design, to a certain extent, ensures that when the cooking appliance 500 is operating in pressureless cooking mode, steam can be quickly and safely discharged to the outside of the cooking chamber 250, thus enabling pressureless cooking even without reducing the heating power of the cooking appliance 500. The number of vent 17 can be specifically limited according to actual conditions, and this utility model does not specifically limit it in this regard. In one example, please refer to... Figure 10 The number of exhaust vents 17 can be 2.

[0073] Please see Figures 11 to 18 The switching component 150 is configured such that the first seal 14 and the second seal 11 can generate relative movement to open and close the vent hole 17, and adjust the opening area of ​​the vent hole 17. Optionally, opening the vent hole 17 refers to any state other than closing it. When the entire venting area of ​​the vent hole 17 is used for venting (the vent hole 17 is fully open), a pressureless cooking mode of the cooking appliance 500 can be achieved. When a portion of the venting area of ​​the vent hole 17 is used for venting (the vent hole 17 is partially open), pressurized cooking modes with different pressures can be achieved. Given a fixed heating power of the cooking appliance 500, the larger the area of ​​the vent hole 17 used for venting, the lower the pressure within the cooking chamber 250.

[0074] Please combine Figure 11 , Figure 14 and Figure 17 The first seal 14 can close the vent 17 to seal the cooking chamber 250, preventing steam from escaping from the cooking appliance 500, and maintaining the pressure within the cooking chamber 250 at the level required for cooking. Figure 12 and Figure 15In this process, the first seal 14 can open a portion of the vent 17, allowing the cooking chamber 250 to communicate with the outside through the vent 17. A portion of the steam inside the cooking chamber 250 can escape outside the cooking appliance 500. The pressure inside the cooking chamber 250 decreases as the area of ​​the vent 17 that is opened increases. Please refer to the figure. Figure 13 , Figure 16 and Figure 18 The first sealing member 14 can fully open the vent hole 17, allowing the cooking chamber 250 to communicate with the outside through the vent hole 17. Most of the steam inside the cooking chamber 250 can escape from the cooking appliance 500, and the cooking chamber 250 is in a partially pressureless state, enabling pressureless cooking. In summary, in this embodiment of the invention, the opening area of ​​the vent hole 17 can be adjusted by the relative movement between the first sealing member 14 and the second sealing member 11, allowing the cooking appliance 500 to switch between pressurized and pressureless cooking. Furthermore, pressureless cooking can be achieved without reducing the power of the cooking appliance 500, thus improving the user experience.

[0075] Optionally, the pot body 200 includes a heating element and an inner pot, the inner pot having a cooking cavity 250, and the heating element may be located below the inner pot. When the heating element is activated, it can heat the inner pot. The power of the heating element is adjustable to meet different heating needs.

[0076] In some embodiments, the pressure limiting member 115 includes an elastic member 112 connected to the first seal 14. The elastic member 112 is configured to provide the first seal 14 with a force that engages with the steam outlet 85 or steam inlet 82 of the vent hole 17, and to allow the first seal 14 to be lifted by the pressure inside the cooking chamber 250 when the pressure inside the cooking chamber 250 is greater than the safety pressure, thereby connecting the cooking chamber 250 to the outside through the vent hole 17.

[0077] Thus, the elastic element 112 is configured such that when the pressure inside the cooking chamber 250 is greater than the safety pressure, the first sealing element 14 can be pushed up by the pressure inside the cooking chamber 250, thereby connecting the cooking chamber 250 to the outside through the vent hole 17. Therefore, when the pressure inside the cooking chamber 250 is low, the cooking appliance 500 can work normally, and when the pressure inside the cooking chamber 250 is greater than the safety pressure, the elastic element 112 can release the pressure in the cooking chamber 250, which to a certain extent ensures the safety of the cooking appliance 500 and also improves the integration of the cooking appliance 500.

[0078] Specifically, the elastic element 112 is a material or component that can deform when a sufficiently large external force is applied to it and return to its original shape after the external force is removed. During the gradual pressurization of the cooking chamber 250, the generated steam exerts gas pressure on the first seal 14, acting on the portion of the first seal 14 exposed through the vent hole 17. The elastic element 112 is connected to the first seal 14, and is configured to provide a force to the first seal 14 that engages with the steam outlet 85 or steam inlet 82 of the vent hole 17. Figure 4 and Figure 5 In this process, the elastic element 112 is configured to provide the first seal 14 with a force that engages with the steam outlet 85 of the vent hole 17. The elastic element 112 provides a downward pressure, so that in the pressurized cooking mode, when the pressure in the cooking chamber 250 is less than or equal to the safe pressure, the elastic element 112 can cause the first seal 14 to close the vent hole 17, so that the cooking appliance 500 can work normally in the pressurized cooking mode.

[0079] When the pressure inside the cooking chamber 250 exceeds the safe pressure, the first seal 14 is pushed up by the pressure inside the cooking chamber 250, thereby opening the vent 17. The cooking chamber 250 then connects to the outside world through the vent 17 for pressure relief. Figure 5 In the process, after the first seal 14 is lifted, the elastic element 112 is compressed to store elastic potential energy.

[0080] During the depressurization process of the cooking chamber 250, the pressure inside the cooking chamber 250 decreases, making the pressure inside the cooking chamber 250 less than or equal to the safe pressure. The elastic element 112 can release elastic potential energy to re-fit the first seal 14 with the steam outlet 85 of the vent hole 17, thereby closing the vent hole 17 and continuing pressurized cooking.

[0081] It is understood that, in other embodiments, the elastic element 112 is configured to provide a force to the first seal 14 that engages with the steam inlet 82 of the vent hole 17. The elastic element 112 may provide a downward pulling force to the first seal 14.

[0082] In one embodiment, the switching assembly 150 includes a second seal 11, which has a vent hole 17, such as Figure 3 As shown, the first seal 14 is located above the second seal 11. The vent 17 includes a steam outlet 85 and a steam inlet 82, with the steam outlet 85 positioned further away from the cooking cavity 250 than the steam inlet 82. The first seal 14 is fitted to the steam outlet 85 of the vent 17 under the action of the elastic member 112.

[0083] In one embodiment, the first seal 14 may be located below the second seal 11. An elastic member 112 is connected to the second seal 11. The elastic member 112 is configured to provide a force to the second seal 11 that engages with the steam outlet 85 or steam inlet 82 of the vent 17. Furthermore, when the pressure within the cooking chamber 250 exceeds a safe pressure, the elastic member 11 is able to be lifted by the pressure within the cooking chamber 250, thereby connecting the cooking chamber 250 to the outside through the vent 17. It is understood that when the first seal 14 is located below the second seal 11, the side area of ​​the second seal 11 facing the cooking chamber 250 is larger than the projected area of ​​the first seal 14 on the second seal. During the gradual pressurization of the cooking chamber 250, the generated steam exerts gas pressure on the second seal 11. This gas pressure acts on the side portion of the second seal 11 facing the cooking chamber 250 that is not blocked by the first seal 14.

[0084] In one embodiment, the pot lid 300 is provided with a steam vent 17, and the first sealing member 14 is fitted against the side of the pot lid 300 away from the cooking cavity 250. The steam vent 17 includes a steam outlet 85 and a steam inlet 82, with the steam outlet 85 being positioned further away from the cooking cavity 250 than the steam inlet 82. The first sealing member 14 is fitted against the steam outlet 85 of the steam vent 17 under the action of the elastic member 112.

[0085] In some embodiments, the switching assembly 150 includes a housing 32, which is fixed to the pot lid 300. The housing 32 has a receiving cavity 38, in which a first sealing member 14 and an elastic member 112 are disposed. The elastic member 112 abuts against the first sealing member 14 and the housing 32, respectively.

[0086] Thus, housing 32 provides a receiving space for the first seal 14 and the elastic member 112, allowing these components to remain in a relatively fixed position within the receiving cavity 38.

[0087] Specifically, please combine Figure 2 The pot lid 300 has a fixing part 88 on its side away from the cooking cavity 250. The switching assembly 150 can be fixedly connected to the fixing part 88 or detachably connected via the housing 32. The fixing part 88 has a fixing post 91, and the housing has a mounting hole 94. The housing 32 is connected to the fixing part 88 by fasteners 96 passing through the mounting hole 94, thereby fixing the housing 32 to the pot lid 300.

[0088] Optionally, the housing 32 and the fixing part 88 can be connected together by means including but not limited to welding, bonding, riveting, etc., so that the housing 32 can maintain high stability; alternatively, the housing 32 and the fixing part 88 can be connected together by means of detachable connection such as bolts, threads, pins, buckles, etc., so that the housing 32 is easy to maintain and replace parts. The connection method between the housing 32 and the fixing part 88 can be specifically defined according to actual needs.

[0089] The present invention does not specifically limit the manufacturing process of the fixing part 88. In one example, the fixing part 88 may be manufactured by means of thread fixing, riveting fixing, welding fixing or integral casting with the pot lid.

[0090] exist Figure 9 An operating portion 58 is formed on the upper surface of the first sealing member 14. The movement of the first sealing member 14 can be achieved electrically and / or manually. Specifically, in the electrically operated mode, the lid assembly 400 may include a motor and a connector. The connector may connect the motor shaft and the operating portion 58. When the motor moves, it drives the operating portion 58 to rotate back and forth or translate back and forth through the connector, thereby causing the first sealing member 14 to rotate back and forth or translate back and forth relative to the second sealing member 11 to open and close the vent hole 17. In the manually operated mode, the operating portion 58 may be exposed from the lid assembly 400. The user can operate the operating portion 58 by hand or tool, rotating or translating the operating portion 58 back and forth, thereby causing the first sealing member 14 to rotate back and forth or translate back and forth relative to the second sealing member 11 to open and close the vent hole 17.

[0091] The elastic element 112 and the first sealing element 14 are disposed within the accommodating cavity 38. One end of the elastic element 112 abuts against the side of the first sealing element 14 away from the cooking cavity 250, and the other end abuts against the side of the housing 32 facing the accommodating cavity 38 and the cooking cavity 250. When the pressure inside the cooking cavity 250 exceeds the safe pressure, the first sealing element 14 moves away from the cooking cavity 250 under the pressure inside the cooking cavity 250 to open the vent 17, thereby connecting the cooking cavity 250 with the outside and relieving pressure.

[0092] Optionally, the operating part 58 and the first sealing member 14 are integrally formed. This invention does not specifically limit the shape of the operating part 58; in one example, the shape of the operating part 58 can be a regular hexagonal prism or other regular or irregular prism.

[0093] In some embodiments, the switching assembly 150 includes a second seal 11 disposed within the receiving cavity 38. A first seal 14 is movably connected to the second seal 11, and the second seal 11 has a vent hole 17. The second seal 11 includes a first contact plane 26, and the first seal 14 includes a second contact plane 29. The first contact plane 26 and the second contact plane 29 are parallel to and in contact with each other. The switching assembly 150 is configured to, when the second seal 11 and the first seal 14 move relative to each other, close the vent hole 17 to seal the cooking cavity 250 through the tight contact between the first contact plane 26 and the second contact plane 29, and to open the vent hole 17 to allow the cooking cavity 250 to communicate with the outside through the vent hole 17. Thus, the first seal 14 and the second seal 11 are movably connected, allowing the cooking appliance 500 to flexibly switch between different cooking modes, thereby meeting different cooking needs and enhancing the diversity and flexibility of cooking.

[0094] Specifically, the second seal 11 is stacked on top of the first seal 14, with the second seal 11 located below the first seal 14. The first contact plane 26 is located below the second contact plane 29, and the first contact plane 26 and the second contact plane 29 are parallel to each other and in close contact. Figures 11 to 13 In the process, the first seal 14 rotates relative to the second seal 11 on the first contact plane 26. The first seal 14 can rotate relative to the second seal 11, thereby opening or closing the vent hole 17.

[0095] Please combine Figures 11 to 18 The interface connecting the second seal 11 and the first seal 14 is planar. Specifically, the first contact plane 26 where the second seal 11 contacts the first seal 14 is planar, and the second contact plane 29 where the first seal 14 contacts the second seal 11 is also planar. The first contact plane 26 and the second contact plane 29 are parallel and in contact with each other, allowing for smoother relative movement between the second seal 11 and the first seal 14. Because the contact surfaces are very smooth, the coefficient of friction μ between them is very low, significantly reducing the operating force and making it easier for the cooking appliance 500 to switch between pressurized and non-pressurized cooking. For example, the second seal 11 and the first seal 14 can be made of ceramic.

[0096] like Figures 11 to 18As shown, in this embodiment of the invention, the second sealing member 11 may be located below the first sealing member 14, and the second sealing member 11 is provided with a steam vent 17. The first sealing member 14 includes a notch 23 corresponding to the steam vent 17, and the notch 23 is disposed on the side of the first sealing member 14. When the notch 23 and the steam vent 17 are connected in the vertical direction, the switching component 150 opens the steam vent 17, the cooking chamber 250 is connected to the outside, and steam can be released; when the notch 23 and the steam vent 17 are not connected in the vertical direction, the switching component 150 closes the steam vent 17, the cooking chamber 250 is not connected to the outside, and remains in a sealed state, and steam cannot escape from the cooking chamber 250 to the outside. This invention does not specifically limit the number of notches 23. In one example, the number of notches 23 is 2, and one notch 23 corresponds to one steam vent 17.

[0097] Optionally, the area of ​​the notch 23 is not less than the steam vent area of ​​the vent 17, so that the vent 17 can be fully opened when the cooking appliance 500 is selected for pressureless cooking. The size of the notch 23 can be specifically limited according to actual needs, and this utility model does not make a specific limitation in this regard.

[0098] In one embodiment, the second seal 11 is located above the first seal 14, and the second seal 11 is provided with a vent hole 17. The positions of the second seal 11 and the first seal 14, as well as the position of the vent hole 17, can be specifically defined according to actual needs, and this embodiment of the present invention does not make specific limitations in this regard.

[0099] In one embodiment, the second seal 11 may be fixed, and the first seal 14 may be movable. In another embodiment, the second seal 11 may be movable, and the first seal 14 may be fixed. In yet another embodiment, both the second seal 11 and the first seal 14 may be movable.

[0100] In some embodiments, the first seal 14 and the second seal 11 are sheet-like structures.

[0101] This allows the exhaust port 17 to achieve a larger exhaust area (opening area) while reducing the height of the switching assembly 150.

[0102] Specifically, the sheet-like structure of the first seal 14 and the second seal 11 means that the first seal 14 and the second seal 11 have relatively thin thicknesses, and the first contact plane 26 of the second seal 11 and the second contact plane 29 of the first seal 14 have large areas. The opening of the vent 17 is located on the first contact plane 26 with a large area, which can achieve a larger vent area (opening area) and at the same time reduce the height of the switching assembly 150 and reduce the space occupied by the cooking appliance 500.

[0103] In one embodiment, the second contact plane 29 of the first seal 14 and the first contact plane 26 of the second seal 11 are circular. The diameter of the second contact plane 29 is much larger than the dimension of the first seal 14 in the height direction of the cooking appliance. The diameter of the first contact plane 26 is much larger than the dimension of the second seal 11 in the height direction of the cooking appliance.

[0104] In one embodiment, the second contact plane 29 of the first seal 14 and the first contact plane 26 of the second seal 11 are rectangular. The length of the diagonal of the second contact plane 29 is much greater than the dimension of the first seal 14 in the height direction of the cooking appliance 500. The length of the diagonal of the first contact plane 26 is much greater than the dimension of the second seal 11 in the height direction of the cooking appliance 500.

[0105] In one embodiment, the second contact plane 29 of the first seal 14 and the first contact plane 26 of the second seal 11 are polygonal. The diameter of the circumscribed circle of the second contact plane 29 is much larger than the dimension of the first seal 14 in the height direction of the cooking appliance 500. The diameter of the circumscribed circle of the first contact plane 26 is much larger than the dimension of the second seal 11 in the height direction of the cooking appliance 500.

[0106] In some embodiments, the first seal 14 is capable of planar movement relative to the second seal 11 on the first contact plane 26, and the opening of the vent hole on the first contact plane 26 is located on the movement path of the first seal 14.

[0107] Thus, when the first seal 14 moves in a planar motion relative to the second seal 11 on the first contact plane 26, the vent hole 17 can be opened or closed. Adjusting the opening area of ​​the vent hole 17 can regulate the pressure inside the cooking cavity 250, allowing the cooking appliance 500 to flexibly adjust the internal pressure according to different cooking needs, thereby enhancing cooking efficiency and safety to a certain extent.

[0108] Specifically, in order for the cooking appliance 500 to flexibly adjust its internal pressure according to different cooking needs and improve cooking results, the opening area of ​​the vent 17 can vary within a certain range. Figures 11 to 18In this arrangement, the second sealing element 11 is stacked on top of the first sealing element 14, with the second sealing element 11 located below the first sealing element 14. The first contact plane 26 is located below the second contact plane 29, and the first contact plane 26 and the second contact plane 29 are parallel to each other and in close contact. The first sealing element 14 can move planarly relative to the second sealing element 11 on the first contact plane 26, and the opening of the vent hole 17 on the first contact plane 26 is located on the movement path of the second contact plane 29. The planar movement of the first sealing element 14 relative to the second sealing element 11 can reduce the height of the pot lid assembly 400 to a certain extent. Figures 11 to 13 In this process, the planar motion of the first seal 14 relative to the second seal 11 is a rotational motion. The first seal 14 can rotate relative to the second seal 11, thereby opening or closing the vent hole 17. Figures 14 to 16 In this process, the planar motion of the first seal 14 relative to the second seal 11 is a translational motion. The first seal 14 can translate relative to the second seal 11, thereby opening or closing the vent hole 17.

[0109] Please combine Figures 11 to 13 The opening area of ​​the vent 17 can be changed according to the relative movement stroke (rotation angle or translation distance) of the first seal 14, which can adjust the pressure in the cooking chamber 250. The cooking appliance 500 can switch between pressurized and depressurized states as needed during cooking. This enhances cooking efficiency and safety to a certain extent, while also enabling it to adapt to various cooking needs.

[0110] In some embodiments, the switching assembly 150 is configured such that the first seal 14 and the second seal 11 move relative to each other to adjust the opening area of ​​the vent 17.

[0111] In this way, the pressure inside the cooking cavity 250 can be adjusted by the opening area of ​​the vent 17.

[0112] Specifically, adjusting the opening area of ​​the vent hole 17 can refer to adjusting the opening area of ​​the vent hole 17 while it is in the open state. In one example, the vent hole 17 is initially closed, and the relative movement of the first seal 14 and the second seal 11 is controlled to open the vent hole 17. When the vent hole 17 is in the open state, the relative movement of the first seal 14 and the second seal 11 is controlled to adjust the opening area of ​​the vent hole 17, for example, adjusting the opening area from 50% × S to 80% × S, where S is the venting area of ​​the vent hole 17.

[0113] Please combine Figure 11 The first seal 14 closes the vent 17, sealing the cooking chamber 250, and the pressure inside the cooking chamber 250 is maintained at the level required for cooking; Figure 12In the middle, the first seal 14 opens a portion of the vent 17, and the pressure inside the cooking cavity 250 decreases as the opening area of ​​the vent 17 increases; please refer to Figure 13 In one embodiment, the first seal 14 fully opens the vent hole 17, and the entire vent area of ​​the vent hole 17 is used for venting steam, so that the cooking appliance 500 can perform pressureless cooking.

[0114] In one embodiment, when the vent 17 is partially open, a portion of the vent area of ​​the vent 17 can be used for venting, enabling the cooking appliance 500 to perform pressureless cooking. In such an embodiment, the first seal 14 can further reduce the opening area of ​​the vent 17 (greater than zero), enabling the cooking appliance 500 to perform micro-pressure cooking (a low-pressure pressurized cooking mode). The first seal 14 can further increase the opening area of ​​the vent 17, enabling the cooking appliance 500 to perform pressureless cooking.

[0115] For example, when the minimum opening area of ​​the vent 17 is 80% × S, a portion of the vent area of ​​the vent 17 can be used for venting, allowing the cooking appliance 500 to achieve pressureless cooking (the pressure inside the cooking chamber 250 is less than or equal to 4 kPa). When the first seal 14 moves to make the opening area of ​​the vent 17 50% × S, the cooking appliance 500 performs micro-pressure cooking (e.g., the pressure inside the cooking chamber is greater than 4 kPa). When the first seal 14 moves to make the opening area of ​​the vent 17 90% × S, the cooking appliance 500 performs pressureless cooking, at which point the pressure inside the cooking chamber 250 is less than the pressure inside the cooking chamber 250 corresponding to an opening area of ​​80% × S.

[0116] In some embodiments, the switching assembly 150 includes an operating valve core 52 and a sealing gasket 35. The two ends of the receiving cavity 38 are respectively provided with a first opening 41 and a second opening 43. The sealing gasket 35 is disposed in the first opening 41. The switching assembly 150 is sealed to the surface of the pot lid 300 away from the cooking cavity 250 through the sealing gasket 35. The operating valve core 52 extends into the receiving cavity 38 through the second opening 43 and is connected to the first sealing member 14. The elastic member 112 abuts between the operating valve core 52 and the first sealing member 14.

[0117] In this way, the sealing gasket 35 can seal the interface between the switching component 150 and the pot lid 300, preventing steam from leaking out from the gap between the switching component 150 and the pot lid 300 and affecting the cooking effect.

[0118] Specifically, please refer to Figure 6The housing 32 has a receiving cavity 38, which can accommodate the first sealing member 14 and the second sealing member 11 stacked together. A sealing gasket 35 is located below the second sealing member 11 and abuts against the surface of the second sealing member 11 facing the cooking cavity 250. The sealing gasket 35 can seal the connection between the second sealing member 11 and the pot lid 300. The pot lid 300 has a through hole 124, which the switching assembly 150 can cover. The sealing gasket 35 prevents steam from leaking out from the gap between the pot lid 300 and the second sealing member 11.

[0119] Please combine Figure 6 The accommodating cavity 38 has a first opening 41 and a second opening 43 at its two ends, respectively. A sealing gasket 35 is disposed at the first opening 41. The sealing gasket 35 can seal the connection between the housing 32 and the lid 300, preventing steam from leaking out from the gap between the lid 300 and the housing 32. In summary, the sealing gasket 35 can seal the connection between the switching component 150 and the lid 300, preventing steam from leaking out from the gap between the lid 300 and the switching component 150 and affecting the cooking effect.

[0120] exist Figure 7 and Figure 8 The first sealing element 14 and the operating valve core 52 are connected by a clearance fit between the first limiting groove and the first limiting block. The movement of the first sealing element 14 can be achieved electrically and / or manually. Specifically, in the electric mode, the pot lid assembly 400 may include a motor and a connector. The connector can connect the output shaft of the motor and the operating valve core 52. When the motor moves, it drives the operating valve core 52 to rotate back and forth or translate back and forth through the connector, thereby causing the first sealing element 14 to rotate back and forth or translate back and forth relative to the second sealing element 11 to open and close the vent hole 17. In the manual mode, the operating valve core 52 can be exposed from the pot lid assembly 400. The user can operate the operating valve core 52 by hand or tool, rotating or translating the valve core 52 back and forth, thereby causing the first sealing element 14 to rotate back and forth or translate back and forth relative to the second sealing element 11 to open and close the vent hole 17.

[0121] One end of the elastic element 112 abuts against the side of the first seal 14 away from the cooking chamber 250, and the other end abuts against the side of the operating valve core 52 facing the cooking chamber 250. When the pressure inside the cooking chamber is greater than the safe pressure, the first seal 14 moves away from the cooking chamber 250 under the pressure inside the cooking chamber 250 to open the vent hole 17, thus connecting the cooking chamber 250 with the outside.

[0122] Optionally, the sealing gasket 35 can be integrally formed with the second sealing element 11, and the sealing gasket 35 is disposed on the side of the second sealing element 11 facing the cooking cavity 250. Optionally, the sealing gasket 35 and the second sealing element 11 can also be two separate parts. After the switching assembly 150 is installed, the sealing gasket 35 and the second sealing element 11 fit tightly together.

[0123] In some embodiments, one of the first sealing member 14 and the operating valve core 52 is provided with a first limiting groove 76, and the other is provided with a first limiting block 79. The first limiting block 79 is clearance-fitted with the first limiting groove 76 so that when the operating valve core 52 moves, the first sealing member 14 is driven to move through the cooperation of the first limiting block 79 and the first limiting groove 76. In this way, the first limiting block 79 can cooperate with the first limiting groove 76, so that when the operating valve core 52 moves, it can drive the first sealing member 14 to perform planar movement on the second sealing member 11.

[0124] Specifically, in the embodiments of this utility model, please refer to... Figure 3 The operating valve core 52 includes a steam vent 109, a first limiting groove 76 disposed on the surface of the first sealing member 14 facing away from the cooking chamber 250, and a first limiting block 79 disposed on the surface of the operating valve core 52 facing the cooking chamber 250. In other embodiments, the first limiting groove 76 may be disposed on the surface of the operating valve core 52 facing the cooking chamber 250, and the first limiting block 79 may be disposed on the surface of the first sealing member 14 facing away from the cooking chamber 250. The first limiting block 79 can be engaged in the first limiting groove 76, so that the operating valve core 52 and the first sealing member 14 are in a gap connection, and when the operating valve core 52 moves, it can drive the first sealing member 14 to perform planar movement on the second sealing member 11.

[0125] This embodiment of the invention does not specifically limit the number of the first limiting groove 76 and the first limiting block 79. In one example, there are two first limiting grooves 76 and two first limiting blocks 79. One first limiting block 79 is disposed in one corresponding first limiting groove 76.

[0126] It is understandable that the operating valve core 52 is gap-connected to the first seal 14, that is, the first limiting groove 76 and the first limiting block 79 are gap-fitted. There is a gap between the first seal 14 and the inner wall of the housing 32, so that when the gas pressure in the cooking cavity 250 pushes up the first seal 14, steam can flow to the outside sequentially from the vent hole 17, the gap between the first seal 14 and the inner wall of the housing 32, the gap between the operating valve core 52 and the first seal 14, and the vent port 109 of the operating valve core 52 (e.g., Figure 5 (As shown). Optionally, the gap between the first seal 14 and the inner wall of the housing 32, and the gap between the operating valve core 52 and the first seal 14, can be from 0.1 mm to -100 mm. One end of the elastic member 112 can be located between the inner wall of the first limiting groove 76 and the outer wall of the first limiting block 79, thereby limiting the elastic member 112.

[0127] In some embodiments, the pressure limiting member 115 includes a sealing gasket 35, which includes a body 121 and a flange 118. The flange 118 is disposed on one end of the body 121 near the cooking cavity 250. The side wall of the receiving cavity 38 near the first opening 41 is provided with a receiving groove 127. The flange 118 is embedded in the receiving groove 127. The flange 118 is configured to deform when the pressure in the cooking cavity 250 is greater than the safe pressure, so that the cooking cavity 250 is connected to the outside of the cooking cavity 250.

[0128] Thus, the flange 118 is configured to deform when the pressure inside the cooking cavity 250 exceeds the safety pressure, thereby connecting the cooking cavity 250 with the outside world. When the pressure inside the cooking cavity 250 is low, the cooking appliance 500 can work normally. When the pressure inside the cooking cavity 250 exceeds the safety pressure, the sealing gasket 35 can deform to release pressure in the cooking cavity 250, which to a certain extent ensures the safety of the cooking appliance 500 and also improves the integration of the cooking appliance 500.

[0129] Specifically, such as Figure 3 , Figure 4 and Figure 6 As shown, the side wall of the accommodating cavity 38 near the first opening 41 is provided with an accommodating groove 127. The accommodating groove 127 is used to accommodate the flange 118. When the pressure in the cooking cavity 250 is less than or equal to the safe pressure, the sealing gasket 35 can seal the interface between the switching component 150 and the pot lid 300. When the pressure in the cooking cavity 250 is greater than the safe pressure, the flange 118 deforms under the pressure in the cooking cavity 250, thereby causing the interface seal between the switching component 150 and the pot lid 300 to fail, releasing excess steam in time, and avoiding safety accidents caused by excessive pressure in the pot.

[0130] In some embodiments, the first seal 14 and the second seal 11 are stacked in the height direction of the cooking appliance 500, and the elastic member 112 keeps the first seal 14 and the second seal 11 relatively stationary in the height direction of the cooking appliance 500.

[0131] Thus, the stacked arrangement of the first seal 14 and the second seal 11 reduces the space occupied by the seals on the lid assembly 400, making the switching assembly 150 more compact. Simultaneously, during cooking, the elastic element 112 keeps the first seal 14 and the second seal 11 relatively stationary in the height direction of the cooking appliance 500, preventing the seals from moving up and down due to steam pressure, vibration, or other external forces. This helps ensure the durability and reliability of the seal, prevents steam leakage, and improves cooking safety and efficiency.

[0132] Specifically, in this embodiment of the invention, the first sealing member 14 and the second sealing member 11 are stacked, with the first sealing member 14 above the second sealing member 11, allowing relative movement between them to open or close the vent hole 17. The second sealing member 11 is closer to the cooking chamber 250 than the first sealing member 14, thus making the vent hole 17 also closer to the cooking chamber 250. When the vent hole 17 connects the cooking chamber 250 to the outside, steam can reach the vent hole 17 more quickly. This design ensures that steam can quickly escape from the cooking chamber 250, reducing the time required to release pressure and improving the cooking efficiency of the cooking appliance 500 to a certain extent.

[0133] The elastic element 112 is located on the side of the first seal 14 away from the cooking cavity 250, that is, on the side of the first seal 14 away from the second seal 11. When the pressure in the cooking cavity 250 is not greater than the safety pressure, the elastic element 112 provides a force (as follows) to the first seal 14 toward the second seal 11, so that the first seal 14 fits tightly against the second seal 11, thereby achieving that the first seal 14 and the second seal 11 remain relatively stationary in the height direction of the cooking appliance 500.

[0134] In some embodiments, the switching component 150 includes a first component and a second component. The first component is provided with a limiting rib, and the second component is provided with a third limiting groove. The limiting rib is embedded in the third limiting groove to limit the relative position of the first component and the second component. The pressure limiting member 115 includes a limiting rib, which is configured to rupture when the pressure inside the cooking cavity 250 is greater than the safe pressure, thereby connecting the cooking cavity 250 with the outside of the cooking cavity 250.

[0135] Thus, the limiting rib is configured to rupture and connect the cooking cavity 250 to the outside when the pressure inside the cooking cavity 250 exceeds the safety pressure. This allows the cooking appliance 500 to work normally when the pressure inside the cooking cavity 250 is low, and to release pressure when the pressure inside the cooking cavity 250 exceeds the safety pressure. This ensures the safety of the cooking appliance 500 to a certain extent and also improves the integration of the cooking appliance 500.

[0136] Specifically, the first component and the second component can be any two different components within the switching assembly 150; the limiting rib can be a protrusion on the first component for embedding into the third limiting groove on the second component; the third limiting groove can be a groove structure on the second component for embedding the limiting rib.

[0137] In one example, such as Figure 3 , Figure 4 and Figure 6As shown, the accommodating cavity 38 has an accommodating groove 127 on its side wall near the first opening 41. The accommodating groove 127 can serve as a third limiting groove. The sealing gasket 35 includes a body 121 and a flange 118. The flange 118 can serve as a limiting rib. The limiting rib is embedded in the third limiting groove to limit the relative position of the sealing gasket 35 and the housing 32.

[0138] When the pressure inside the cooking cavity 250 is less than or equal to the safe pressure, the sealing gasket 35 can seal the interface between the switching component 150 and the pot lid 300. When the pressure inside the cooking cavity 250 is greater than the safe pressure, the limiting rib will break under the pressure inside the cooking cavity 250, thereby causing the interface seal between the switching component 150 and the pot lid 300 to fail, allowing for timely pressure relief and preventing safety accidents caused by excessive pressure inside the pot.

[0139] In some embodiments, the exhaust area of ​​the exhaust port 17 is greater than or equal to 19.5 mm. 2 And less than or equal to 314mm 2 The materials of the second seal 11 and the first seal 14 are hard materials with a Vickers hardness greater than or equal to 50HV5; the surface roughness of the first contact plane 26 of the cooking utensil 500 is not greater than 3.2 micrometers and the flatness is not greater than 3.2 micrometers; the surface roughness of the second contact plane 29 is not greater than 3.2 micrometers and the flatness is not greater than 3.2 micrometers.

[0140] In this way, the switching effect between pressure cooking and non-pressure cooking of cooking appliance 500 can be guaranteed to a certain extent.

[0141] Specifically, in one embodiment, the cooking appliance 500 satisfies the requirement that the steam vent area of ​​the vent 17 is greater than or equal to 19.5 mm. 2 And less than or equal to 314mm 2 In one embodiment, the cooking appliance 500 satisfies that the materials of the second seal 11 and the first seal 14 are hard materials, and the Vickers hardness of the hard materials is greater than or equal to 50 HV5. In one embodiment, the cooking appliance 500 satisfies that the surface roughness of the first contact plane 26 of the cooking appliance 500 is not greater than 3.2 micrometers, and the flatness is not greater than 3.2 micrometers, and the surface roughness of the second contact plane 29 is not greater than 3.2 micrometers, and the flatness is not greater than 3.2 micrometers.

[0142] In one embodiment, the cooking appliance 500 satisfies that the steam vent 17 has a steam vent area greater than or equal to 19.5 mm². 2 And less than or equal to 314mm 2 The materials of the second seal 11 and the first seal 14 are hard materials with a Vickers hardness greater than or equal to 50 HV5. In one embodiment, the cooking appliance 500 satisfies that the vent area of ​​the vent 17 is greater than or equal to 19.5 mm².2 And less than or equal to 314mm 2 The surface roughness and flatness of the first contact plane 26 of the cooking appliance 500 are both no greater than 3.2 micrometers and no greater than 3.2 micrometers, respectively, and the surface roughness and flatness of the second contact plane 29 are both no greater than 3.2 micrometers and no greater than 3.2 micrometers, respectively. In one embodiment, the cooking appliance 500 satisfies the following conditions: the materials of the second seal 11 and the first seal 14 are hard materials with a Vickers hardness greater than or equal to 50 HV5; the surface roughness and flatness of the first contact plane 26 of the cooking appliance 500 are both no greater than 3.2 micrometers and no greater than 3.2 micrometers, respectively; and the surface roughness and flatness of the second contact plane 29 are both no greater than 3.2 micrometers and no greater than 3.2 micrometers, respectively.

[0143] In one embodiment, the cooking appliance 500 simultaneously satisfies that the exhaust area of ​​the vent hole 17 is greater than or equal to 19.5 mm. 2 And less than or equal to 314mm 2 The materials of the second seal 11 and the first seal 14 are hard materials with a Vickers hardness greater than or equal to 50HV5. The surface roughness of the first contact plane 26 of the cooking appliance 500 is not greater than 3.2 micrometers and the flatness is not greater than 3.2 micrometers. The surface roughness of the second contact plane 29 is not greater than 3.2 micrometers and the flatness is not greater than 3.2 micrometers.

[0144] Please combine Figures 11 to 18 The vent 17 is located on the second seal 11, which is fixed. The first seal 14 is movable, moving relative to the second seal 11 to open the vent 17, allowing the cooking chamber 250 to communicate with the outside through the vent 17. The vent 17 serves as a channel for steam to escape from the cooking chamber 250 to the outside, releasing pressure. During high-power operation of the cooking appliance 500, if the vent area of ​​the vent 17 is too small, a pressure-free cooking mode cannot be achieved without reducing the power of the cooking appliance 500. If the vent area of ​​the vent 17 is too large, the switching component 150 requires an excessively large volume and incurs high manufacturing costs. Therefore, an appropriate vent area of ​​the vent 17 ensures that the cooking appliance 500 can quickly reach and maintain a pressure-free state during high-power cooking, thereby improving cooking efficiency. In this embodiment, the vent area of ​​the vent 17 is greater than or equal to 19.5 mm. 2 And less than or equal to 314mm 2 This allows the cooking appliance 500 to remain pressure-free even when operating at high power (ensuring the pressure inside the cooking cavity 250 is less than 1 kPa), thus providing a rapid and even heating effect for the food to a certain extent.

[0145] When the vent hole 17 is fully open, the vent area of ​​the vent hole 17 is S. S is greater than or equal to 19.5 mm. 2 And less than or equal to 314mm 2 That is, 19.5mm 2 ≤S≤314mm 2 In some examples, S = 19.5 mm 2 49mm 2 78.5mm 2 108mm 2 137.5mm 2 167mm 2 196.5mm 2 2. Cooking utensils 500mm 2 255.5mm 2 285mm 2 314mm 2 Or, greater than or equal to 19.5mm 2 And less than or equal to 314mm 2 Other values.

[0146] When the cooking appliance 500 is in operation, especially in pressurized cooking mode, significant pressure is generated inside the cooking cavity 250. This high pressure acts on the second seal 11 and the first seal 14. Therefore, the materials of the second seal 11 and the first seal 14 can be made of hard materials that can withstand high pressure without easily or easily deforming or being damaged, in order to extend their service life. The Vickers hardness of the hard material is greater than or equal to 50HV5.

[0147] This invention does not specifically limit the materials of the second sealing element 11 and the first sealing element 14. Vickers hardness is a method for measuring the hardness of a material; the higher the Vickers hardness value, the greater the hardness of the material. In this embodiment of the invention, the hard materials used for the second sealing element 11 and the first sealing element 14 have a Vickers hardness greater than or equal to 50HV5, exhibiting good wear resistance and the ability to resist friction and wear, while also possessing strong compressive strength, capable of withstanding significant pressure without deformation or damage.

[0148] The Vickers hardness H of the hard material is greater than or equal to 50HV5, that is, H≥50HV5. In some examples, H = 50HV5, 52HV5, 54HV5, 56HV5, 58HV5, or other values ​​greater than or equal to 50HV5. The upper limit of H can be determined based on factors such as the manufacturing process and cost of the first seal 14 and the second seal 11.

[0149] Specifically, please combine Figures 11 to 18The second sealing element 11 is stacked with the first sealing element 14, employing a mechanical seal. The switching component 150 is mounted on the pot lid 300 via a sealing gasket 35. Under the pressure provided by the sealing gasket 35 and the pressure within the cooking cavity 250, the first contact surface 26 of the cooking appliance 500 and the second contact surface 29 are tightly fitted together, forming a sealing effect at the contact surface. Simultaneously, the first sealing element 14 performs planar movement on the second sealing element 11, which can open or close the vent hole 17. To ensure smoother relative movement between the second sealing element 11 and the first sealing element 14, and to achieve a better sealing effect between the first contact surface 26 of the cooking appliance 500 and the second contact surface 29, the surface roughness and flatness of the first contact surface 26 of the cooking appliance 500 and the second contact surface 29 have certain requirements. The smaller the surface roughness and flatness, the smoother and flatter the contact surface. Because the two contact surfaces are very smooth, the coefficient of friction μ between them is very low (usually less than 0.5). The original switching force F1 = pressure inside the pot P * area of ​​the vent S is reduced to the switching force F2 = pressure inside the pot P * area of ​​the vent S * coefficient of friction μ, which greatly reduces the operating force and makes it easier for the cooking appliance 500 to switch between pressure cooking and non-pressure cooking to a certain extent.

[0150] In this embodiment of the invention, the surface roughness of the first contact plane 26 cooking utensil 500 is no greater than 3.2 micrometers, and the flatness is no greater than 3.2 micrometers; the surface roughness of the second contact plane 29 is no greater than 3.2 micrometers, and the flatness is no greater than 3.2 micrometers. This makes the relative movement between the second sealing member 11 and the first sealing member 14 smoother, and makes the first contact plane 26 cooking utensil 500 and the second contact plane 29 form a better sealing effect.

[0151] Surface roughness R is no greater than 3.2 micrometers, i.e., R ≤ 3.2 micrometers. In one example, R = 3.2 micrometers, 3.0 micrometers, 2.8 micrometers, 2.6 micrometers, 2.4 micrometers, 2.2 micrometers, 2.0 micrometers, or any other value no greater than 3.2 micrometers. Flatness F is no greater than 3.2 micrometers, i.e., F ≤ 3.2 micrometers. In one example, F = 3.2 micrometers, 3.0 micrometers, 2.8 micrometers, 2.6 micrometers, 2.4 micrometers, 2.2 micrometers, 2.0 micrometers, or any other value no greater than 3.2 micrometers. The lower limits of R and F can be determined based on factors such as manufacturing process and cost.

[0152] Optionally, the surface roughness and flatness of the first contact plane 26 of the cooking utensil 500 may be the same as or different from the surface roughness and flatness of the second contact plane 29.

[0153] In an optional embodiment, one of the sidewalls of the accommodating cavity 38 and the second sealing member 11 is provided with a second limiting groove 46, and the other is provided with a second limiting block 49. The second limiting block 49 is disposed in the second limiting groove 46 so that the housing 32 limits the second sealing member 11.

[0154] Thus, the second limiting block 49 and the second limiting groove 46 can cooperate with each other, so that the housing 32 can restrict the movement of the second seal 11.

[0155] Specifically, in the embodiments of this utility model, please refer to... Figure 3 , Figure 6 and Figure 10 The second limiting groove 46 is provided on the side wall of the receiving cavity 38 of the housing 32, and the first limiting block 49 is provided on the circumferential side of the second sealing member 11. In other embodiments, the first limiting groove 46 may be provided on the circumferential side of the second sealing member 11, and the first limiting block 49 may be provided on the side wall of the receiving cavity 38 of the housing 32.

[0156] The first limiting block 49 can be inserted into the first limiting groove 46, so that the housing 32 and the second sealing member 11 are tightly fitted, which can restrict the movement of the second sealing member 11, and allow the first sealing member 14 to move relative to the second sealing member 11 (such as rotational or translational movement).

[0157] This embodiment of the invention does not specifically limit the number of the second limiting groove 46 and the second limiting block 49. In one example, there are two second limiting grooves 46 and two limiting blocks 49. One second limiting block 49 is disposed in a corresponding second limiting groove 46.

[0158] In an alternative embodiment, the first seal 14 may block part, all, or not block the vent 17.

[0159] Thus, the first sealing element 14 and the second sealing element 11 cooperate with each other, and the degree of obstruction of the vent hole 17 can be adjusted to change the opening area of ​​the vent hole 17. The degree of obstruction of the vent hole 17 can be flexibly adjusted to change the opening area of ​​the vent hole 17, which can meet the different cooking needs of the cooking appliance 500 to a certain extent.

[0160] Specifically, please combine Figures 11 to 13 When the first seal 14 and the second seal 11 move relative to each other, the first seal 14 can block part of the vent hole 17, or block it completely, or not block it at all. Figure 12 In the middle, the first seal 14 blocks a portion of the vent hole 17, and the opening area of ​​the vent hole 17 is between zero and the vent area, which can reduce the steam release rate, thereby controlling the rate of pressure rise inside the cooking cavity 250 and achieving more precise pressure regulation; in Figure 11 In the middle, the first sealing element 14 completely blocks the vent hole, and the opening area of ​​the vent hole 17 is zero, which can prevent steam release and cause the internal pressure of the pressure cooker to rise rapidly; in Figure 13 In this design, the first sealing element 14 does not obstruct the vent hole 17, and the opening area of ​​the vent hole 17 reaches the venting area, allowing steam to be released freely for pressureless cooking. Different ingredients and cooking methods may require different pressure levels. By utilizing the cooperation between the first sealing element 14 and the second sealing element 11, the degree of obstruction of the vent hole 17 can be flexibly adjusted to change the opening area of ​​the vent hole 17, thereby meeting the different cooking needs of the cooking appliance 500 to a certain extent.

[0161] In an optional embodiment, the relative movement between the second seal 11 and the first seal 14 includes rotational movement and / or translational movement.

[0162] Thus, the relatively simple motion forms of rotation and translation make it easier for the cooking appliance 500 to switch between pressurized and unpressurized states, and also make the maintenance and replacement of parts of the switching component 150 more convenient.

[0163] Specifically, the second seal 11 and the first seal 14 rotate relative to each other. Figures 11 to 13 Optionally, the first seal 14 rotates counterclockwise. The second seal 11 and the first seal 14 are... Figure 11 When the cooking chamber 250 is in the middle position, the vent 17 is completely blocked, sealing the cooking chamber 250. Steam inside the cooking chamber 250 will not escape from the cooking appliance 500, and the pressure inside the cooking chamber 250 will remain at the level required for cooking. After the first seal 14 is rotated counterclockwise by a certain angle, if the second seal 11 and the first seal 14 are in the middle position... Figure 12 In the middle position, part of the vent 17 is blocked, allowing the cooking chamber 250 to communicate with the outside through the vent 17. Some steam inside the cooking chamber 250 can escape outside the cooking appliance 500. The pressure inside the cooking chamber 250 decreases as the area of ​​the vent 17 that is opened increases. After the first seal 14 continues to rotate counterclockwise by a certain angle, if the second seal 11 and the first seal 14 are in... Figure 13 In the middle position, the steam vent 17 is not blocked, so that the cooking chamber 250 is connected to the outside through the steam vent 17. Most of the steam in the cooking chamber 250 can escape from the cooking appliance 500. The cooking chamber 250 is in a pressureless state to a certain extent, so pressureless cooking can be carried out.

[0164] The second seal 11 and the first seal 14 undergo relative translational movement, as shown in the example. Figures 14 to 16 Optionally, the translation direction of the first seal 14 is from left to right. The second seal 11 and the first seal 14 are... Figure 14 When the cooking chamber 250 is in the middle position, the vent 17 is completely blocked, sealing the cooking chamber 250. Steam inside the cooking chamber 250 will not escape from the cooking appliance 500, and the pressure inside the cooking chamber 250 will remain at the level required for cooking. After the first seal 14 is moved a certain distance to the right, if the second seal 11 and the first seal 14 are in the middle position... Figure 15 In the middle position, part of the vent 17 is blocked, allowing the cooking chamber 250 to communicate with the outside through the vent 17. Some steam inside the cooking chamber 250 can escape outside the cooking appliance 500. The pressure inside the cooking chamber 250 decreases as the area of ​​the vent 17 that is opened increases. After the first seal 14 continues to move a certain distance to the right, if the second seal 11 and the first seal 14 are in... Figure 16 In the middle position, the steam vent 17 is not blocked, so that the cooking chamber 250 is connected to the outside through the steam vent 17. Most of the steam in the cooking chamber 250 can escape from the cooking appliance 500. The cooking chamber 250 is in a pressureless state to a certain extent, so pressureless cooking can be carried out.

[0165] In an optional embodiment, the second seal 11 is provided with a first guide portion 106, and the first seal 14 is provided with a second guide portion 109. The first guide portion 106 and the second guide portion 109 are connected to each other to guide the relative movement of the second seal 11 and the first seal 14.

[0166] Thus, the first guide part 106 and the second guide part 109 cooperate and connect to guide the first seal 14 to make relative planar movement with the second seal 11, making it easier to change the opening area of ​​the exhaust hole 17.

[0167] Specifically, please combine Figure 17 and Figure 18 The second sealing member 11 has a first guide portion 106 at its middle position, and the first sealing member 14 has a corresponding second guide portion 109. The second guide portion 109 can move on the first guide portion 106. The first guide portion 106 and the second guide portion 109 cooperate and connect to guide the first sealing member 14 to perform relative planar movement with the second sealing member 11. This embodiment of the invention does not specifically limit the types of the first guide portion 106 and the second guide portion 109. In one example, the first guide portion 106 can be a groove, and the second guide portion 109 can be a protrusion that slides within the groove.

[0168] When the second seal 11 and the first seal 14 are in Figure 17When the first seal 14 is in the middle position, the vent 17 is completely blocked, sealing the cooking chamber 250. Steam inside the cooking chamber 250 will not escape from the cooking appliance 500, and the pressure inside the cooking chamber 250 will remain at the level required for cooking. After the first seal 14 moves a certain distance, when the second seal 11 is in the middle position... Figure 18 In the cooking cavity 250, the vent 17 is not obstructed, allowing the cooking cavity 250 to communicate with the outside world through the vent 17. Most of the steam inside the cooking cavity 250 can escape outside the cooking appliance 500, and the cooking cavity 250 is in a state of depressurization to a certain extent, enabling depressurized cooking. The position and number of the first guide part 106 and the second guide part 109 can be specifically limited according to actual needs; this embodiment of the invention does not impose specific limitations in this regard.

[0169] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this utility model. 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 may be combined in any suitable manner in one or more embodiments or examples.

[0170] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A cooking utensil, characterized in that, include: A pot lid assembly, comprising a pot lid, a switching component, and a steam vent, wherein the switching component is disposed on the pot lid; A pot body, the pot body being connected to the pot lid, a cooking cavity being formed inside the pot body, and the pot lid assembly covering the cooking cavity; The switching component includes a first seal and a pressure limiting member. The first seal can switch back and forth between a first position and a second position. In the first position, the first seal closes the vent hole to seal the cooking chamber. In the second position, the first seal opens the vent hole to allow the cooking chamber to communicate with the outside of the cooking chamber through the vent hole. The pressure limiting component is configured to connect the cooking cavity to the outside world when the pressure inside the cooking cavity is greater than the safe pressure.

2. The cooking utensil according to claim 1, characterized in that, The vent area of ​​the vent hole is configured to enable the cooking appliance to perform pressureless cooking when the vent hole is open.

3. The cooking utensil according to claim 1, characterized in that, The pressure limiting component includes an elastic element connected to the first sealing element. The elastic element is configured to provide a force to the first sealing element that engages with the steam outlet or inlet of the vent hole, and to allow the first sealing element to be lifted by the pressure inside the cooking cavity when the pressure inside the cooking cavity exceeds the safety pressure, thereby connecting the cooking cavity to the outside through the vent hole.

4. The cooking utensil according to claim 3, characterized in that, The switching assembly includes a housing, which is fixed to the pot lid. The housing has a receiving cavity, in which the first sealing member and the elastic member are disposed. The elastic member abuts against the first sealing member and the housing, respectively.

5. The cooking utensil according to claim 4, characterized in that, The switching assembly includes a second seal, which is disposed within the accommodating cavity. The first seal and the second seal are movably connected, and the second seal is provided with the vent hole. The second seal includes a first contact plane, and the first seal includes a second contact plane, wherein the first contact plane and the second contact plane are parallel to and in contact with each other; The switching component is configured to close the vent hole to seal the cooking chamber by means of close contact between the first contact plane and the second contact plane when the second seal and the first seal move relative to each other, and to open the vent hole to allow the cooking chamber to communicate with the outside of the cooking chamber through the vent hole.

6. The cooking utensil according to claim 5, characterized in that, The first seal and the second seal have a sheet-like structure.

7. The cooking utensil according to claim 5, characterized in that, The first seal is capable of planar movement relative to the second seal on the first contact plane, and the opening of the vent hole on the first contact plane is located on the movement path of the first seal.

8. The cooking utensil according to claim 5, characterized in that, The switching component is configured such that the first seal and the second seal can move relative to each other to adjust the opening area of ​​the vent hole.

9. The cooking utensil according to claim 5, characterized in that, The switching assembly includes an operating valve core and a sealing gasket. The two ends of the receiving cavity are respectively provided with a first opening and a second opening. The sealing gasket is disposed in the first opening. The switching assembly is sealed to the surface of the pot lid away from the cooking cavity through the sealing gasket. The operating valve core extends into the receiving cavity through the second opening and is connected to the first sealing element. The elastic element abuts between the operating valve core and the first sealing element.

10. The cooking utensil according to claim 9, characterized in that, One of the first sealing element and the operating valve core is provided with a first limiting groove, and the other is provided with a first limiting block. The first limiting block and the first limiting groove are connected with a clearance fit so that when the operating valve core moves, the first sealing element is driven to move through the cooperation of the first limiting block and the first limiting groove.

11. The cooking utensil according to claim 9, characterized in that, The pressure limiting component includes the sealing gasket, which includes a body and a flange. The flange is disposed on the end of the body near the cooking cavity. The side wall of the accommodating cavity near the first opening is provided with an accommodating groove. The flange is embedded in the accommodating groove. The flange is configured to deform when the pressure in the cooking cavity is greater than the safe pressure, so that the cooking cavity is connected to the outside of the cooking cavity.

12. The cooking utensil according to claim 5, characterized in that, In the height direction of the cooking appliance, the first seal and the second seal are stacked. When the pressure in the cooking cavity is not greater than the safe pressure, the elastic member keeps the first seal and the second seal relatively stationary in the height direction of the cooking appliance.

13. The cooking utensil according to claim 1, characterized in that, The switching component includes a first component and a second component. The first component is provided with a limiting rib, and the second component is provided with a third limiting groove. The limiting rib is embedded in the third limiting groove to limit the relative position of the first component and the second component. The pressure limiting member includes the limiting rib. The limiting rib is configured to rupture when the pressure in the cooking cavity is greater than the safe pressure, so that the cooking cavity is connected to the outside of the cooking cavity.

14. The cooking utensil according to claim 5, characterized in that, The cooking appliance satisfies at least one of the following: the steam vent area is greater than or equal to 19.5 mm². 2 And less than or equal to 314mm 2 ; The second seal and the first seal are made of hard material, and the Vickers hardness of the hard material is greater than or equal to 50HV5; The surface roughness of the first contact plane is no greater than 3.2 micrometers, and the flatness is no greater than 3.2 micrometers; the surface roughness of the second contact plane is no greater than 3.2 micrometers, and the flatness is no greater than 3.2 micrometers.

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