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 device 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 device comprises a switching assembly and a voltage limiting assembly. The switching assembly is provided with a mounting hole, the pressure limiting assembly comprises a steam exhaust valve and a steam exhaust pipe, the steam exhaust pipe penetrates through the mounting hole and is communicated with the cooking cavity, and the steam exhaust valve is arranged at the end, away from the cooking cavity, of the steam exhaust pipe. According to the cooking utensil, the pressure limiting assembly and the switching assembly can be integrated together, the installation space of the switching device is saved to a certain degree, and miniaturization of the cooking utensil is facilitated.

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 achieve pressureless cooking in electric pressure cookers, a switching device is typically added to the original pressure cooker structure, allowing switching between pressure-cooking and pressureless cooking modes. However, this requires additional installation space for the switching device, which is detrimental to the miniaturization design of the product. 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 device, and a steam vent, wherein the switching device 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 device includes a switching component and a pressure limiting component. The switching component is configured to switch between a pressurized cooking mode and a pressureless cooking mode of the cooking appliance. In the pressurized cooking mode, the switching component closes the vent hole to seal the cooking chamber. In the pressureless cooking mode, the switching component opens the vent hole to connect the cooking chamber to the outside through the vent hole.

[0008] The switching component is provided with a mounting hole. The pressure limiting component includes a steam vent valve and a steam vent pipe. The steam vent pipe passes through the mounting hole and is connected to the cooking chamber. The steam vent valve is located at the end of the steam vent pipe away from the cooking chamber. The pressure limiting component is configured such that when the pressure in the cooking chamber is less than or equal to a set pressure, the steam vent valve seals the steam vent pipe; when the pressure in the cooking chamber is greater than the set pressure, the steam vent valve opens the steam vent pipe, allowing the cooking chamber to connect to the outside of the cooking chamber through the steam vent pipe.

[0009] In the aforementioned cooking appliances, the exhaust pipe of the pressure limiting component passes through the mounting hole of the switching component, thereby integrating the pressure limiting component and the switching component together. This saves installation space for the switching device to a certain extent and is beneficial for the miniaturization of the cooking appliances.

[0010] In some embodiments, the vent area of ​​the vent is configured to enable pressureless cooking when the vent is open. In some embodiments, the switching assembly includes a first seal that is movable and can switch between a first position and a second position. In the first position, the first seal closes the vent to seal the cooking chamber; in the second position, the first seal opens the vent to allow the cooking chamber to communicate with the outside through the vent.

[0011] In some embodiments, the switching assembly includes a second seal having the vent hole, the second seal including a first contact plane, the first seal including a second contact plane, the first contact plane and the second contact plane being parallel to and in contact with each other;

[0012] 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.

[0013] 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.

[0014] In some embodiments, the first seal is located on the side of the second seal opposite to the pot lid.

[0015] In some embodiments, the first seal and the second seal are stacked in the height direction of the cooking appliance, the mounting hole passes through the first seal and the second seal, and the first seal or the second seal is rotatable around the vent pipe to open and close the vent.

[0016] In some embodiments, the vent valve, the first seal, and the second seal are arranged from top to bottom in the height direction of the cooking appliance.

[0017] In some embodiments, the pot lid is provided with a steam vent, the switching device covers the steam vent, the pot lid assembly includes a support member connected to the wall of the steam vent, the surface of the support member opposite to the cooking cavity is flush with the surface of the pot lid opposite to the cooking cavity, and the support member supports the second sealing member.

[0018] In some embodiments, the second seal is fixed, and the first seal is capable of planar movement relative to the second seal on the first contact plane to open and close the vent hole, the opening of the vent hole on the first contact plane being located on the movement path of the first seal.

[0019] In some embodiments, the switching assembly includes a housing and an operating assembly. The housing is fixed to the pot lid and has a receiving cavity. The first seal and the second seal are disposed within the receiving cavity. A portion of the operating assembly is located within the receiving cavity and connected to the first seal, while another portion extends out of the receiving cavity. The operating assembly is configured to move the first seal relative to the second seal during movement.

[0020] In some embodiments, the operating component includes an operating lever and a lever, one end of the operating lever being located inside the receiving cavity and connected to the first seal, and the other end of the operating lever being located outside the receiving cavity and connected to the lever, the mounting hole penetrating the lever and the operating lever, the lever having a receiving groove on its side away from the operating lever, and the exhaust valve being partially located in the receiving groove.

[0021] In some embodiments, the operating component includes a pressure plate and a first sealing ring, the first sealing ring sealingly connecting the housing and the operating rod, the pressure plate being sleeved on the outside of the housing and connecting the operating rod and the lever, the pressure plate pressing against the first sealing ring.

[0022] In some embodiments, one of the first seal and the operating rod 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 cooperation so that when the operating rod moves, the first seal is driven to move through the cooperation of the first limiting block and the first limiting groove.

[0023] In some embodiments, the pot lid is provided with the steam vent, and the pot lid includes a third contact plane, which is parallel to and in contact with the second contact plane;

[0024] The switching component is configured to close the vent hole to seal the cooking cavity by means of close contact between the third contact plane and the second contact plane when the lid and the first seal move relative to each other, and to open the vent hole to allow the cooking cavity to communicate with the outside of the cooking cavity through the vent hole.

[0025] 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 314mm2 ;

[0026] 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;

[0027] The surface roughness of the first contact plane where the second seal contacts the first seal 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 where the first seal contacts the second seal is no greater than 3.2 micrometers, and the flatness is no greater than 3.2 micrometers.

[0028] 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

[0029] 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:

[0030] Figure 1 This is an exploded view of the pot lid assembly according to an embodiment of the present invention.

[0031] Figure 2 This is another exploded view of the pot lid assembly according to an embodiment of the present utility model;

[0032] Figure 3 This is a cross-sectional schematic diagram of the pot lid assembly of this utility model under pressure cooking conditions.

[0033] Figure 4 This is a cross-sectional schematic diagram of the pot lid assembly of this utility model under pressureless cooking conditions.

[0034] Figure 5 This is a schematic diagram of the shell structure according to an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the structure of the operating valve core according to an embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of the structure of the first sealing element according to an embodiment of the present invention;

[0037] Figure 8 This is a schematic diagram of the connection between the first sealing element and the operating rod in this embodiment of the utility model;

[0038] Figure 9 This is a schematic diagram of the structure of the second sealing element according to an embodiment of the present invention;

[0039] Figure 10 This is a schematic diagram of the structure of the first and second sealing elements in a pressurized cooking state according to an embodiment of the present invention;

[0040] Figure 11 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;

[0041] Figure 12 This is a schematic diagram of the structure of the first and second sealing elements in a pressureless cooking state according to an embodiment of the present invention;

[0042] Figure 13 This is another structural schematic diagram of the first and second sealing elements in a pressurized cooking state according to an embodiment of the present invention;

[0043] Figure 14 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;

[0044] Figure 15 This is another structural schematic diagram of the first and second sealing elements in a pressureless cooking state according to an embodiment of the present invention;

[0045] Figure 16 This is another structural schematic diagram of the first and second sealing elements in a pressurized cooking state according to an embodiment of the present invention.

[0046] Figure 17 This is another structural schematic diagram of the first and second sealing elements in a pressureless cooking state according to an embodiment of the present invention.

[0047] Figure 18 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.

[0048] Explanation of key figure labels:

[0049] Second seal - 11, First seal - 14, Exhaust hole - 17, Exhaust valve 20-20, Notch - 23, Second contact surface - 29, First contact surface - 26, Housing - 32, Second sealing ring - 35, Receiving cavity - 38, First opening - 41, Second opening - 43, Second limiting block - 49, Operating lever - 52, Exhaust pipe - 55, Mounting hole - 58, Support - 61, Operating assembly - 64, Pressure plate - 67, Toggle lever - 70. First limiting groove-76, first limiting block-79, support member-82, steam outlet-85, first sealing ring-88, fixing member-91, first guide part-106, steam vent-124, receiving groove-127, switching device-100, switching assembly-150, pressure limiting assembly-151, pot lid-300, pot lid assembly-400, inner lid-401, perforation-402, guide ring-403, guide groove-71, third contact plane-72. 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 and Figure 2 The present invention provides a cooking utensil including a lid assembly 400 and a pot body (not shown). The lid assembly 400 includes a lid 300, a switching device 100 and a steam vent 17, and the switching device 100 is disposed on the lid 300.

[0056] The pot body is connected to the pot lid 300, and a cooking cavity is formed inside the pot body. The pot lid assembly 400 covers the cooking cavity.

[0057] The switching device 100 includes a switching component 150 and a pressure limiting component 151. The switching component 150 is configured to switch between a pressurized cooking mode and a pressureless cooking mode of the cooking appliance. In the pressurized cooking mode, the switching component 150 closes the vent hole 17 to seal the cooking chamber. In the pressureless cooking mode, the switching component 150 opens the vent hole 17 to connect the cooking chamber to the outside through the vent hole 17. The switching component 150 is provided with a mounting hole 58. The pressure limiting component 151 includes a vent valve 20 and a vent pipe 55. The vent pipe 55 passes through the mounting hole 58 and is connected to the cooking chamber. The vent valve 20 is located at the end of the vent pipe 55 away from the cooking chamber. The pressure limiting component 151 is configured such that when the pressure in the cooking chamber is less than or equal to the set pressure, the vent valve 20 seals the vent pipe 55; when the pressure in the cooking chamber is greater than the set pressure, the vent valve 20 opens the vent pipe 55 to connect the cooking chamber to the outside through the vent pipe 55.

[0058] In the aforementioned cooking appliance, the exhaust pipe 55 of the pressure limiting component 151 passes through the mounting hole 58 of the switching component 150, thereby integrating the pressure limiting component 151 and the switching component 150 together, saving the installation space of the switching device 100 to a certain extent, which is beneficial to the miniaturization of the cooking appliance.

[0059] Specifically, the cooking appliance can operate in both pressurized cooking mode and pressureless cooking mode. In pressurized cooking mode, the switching component 150 can close the vent 17 to seal the cooking chamber, thereby allowing pressurized cooking of the food. In pressureless cooking mode, the switching component 150 can fully open the vent 17 to connect the cooking chamber to the outside environment, thereby allowing pressureless cooking of the food.

[0060] When the cooking appliance is operating in pressurized cooking mode, if the pressure inside the cooking chamber is less than or equal to the set pressure, the pressure limiting component 151 can seal the vent pipe 55 through the vent valve 20, thereby maintaining the pressure and temperature inside the cooking chamber and ensuring that the food is cooked under appropriate pressure conditions. If the pressure inside the cooking chamber is greater than the set pressure, the pressure inside the cooking chamber can push up the vent valve 20, causing the vent pipe to open, thus connecting the cooking chamber to the outside through the vent pipe 55, thereby releasing pressure, reducing the pressure inside the cooking chamber, preventing overpressure, ensuring safe use, or meeting the needs of low-pressure cooking.

[0061] Cooking appliances include, but are not limited to, pressure cookers, electric pressure cookers, pressure slow cookers, etc. The cooking appliance includes a lid 300, a pot body, and a cooking cavity. When the lid 300 and the pot body are closed, they fit tightly together via a sealing ring, forming a relatively sealed cooking cavity. When the vent 17 is closed and the cooking appliance begins to operate, the food inside the cooking cavity is heated, the water inside the cooking cavity begins to evaporate, and the amount of steam gradually increases, causing the pressure inside the cooking cavity to gradually rise. Because the cooking cavity is sealed at this time, the steam cannot escape from the cooking appliance, resulting in the pressure inside the cooking cavity being maintained, thereby raising the boiling point of water and accelerating the cooking process.

[0062] In pressurized cooking mode, the gas inside the cooking chamber exerts a force on the exhaust valve 20, moving it away from the cooking chamber. When the pressure inside the cooking chamber is less than or equal to the set pressure, the exhaust valve 20 can seal the exhaust pipe 55 under the action of gravity, keeping the pressure inside the cooking chamber essentially constant. When the pressure inside the cooking chamber is greater than the set pressure, the exhaust valve 20 can be pushed up by the gas inside the cooking chamber, allowing it to overcome gravity and open the exhaust pipe 55, thus connecting the cooking chamber to the outside world through the exhaust pipe 55.

[0063] To prevent excessive pressure within the cooking cavity from causing safety hazards or to meet the needs of low-pressure cooking, the cooking appliance implements an automatic pressure relief function through the pressure-limiting component 151. In related technologies, pressure cookers typically include a switching device to provide more cooking options and flexibility to meet different ingredients and cooking needs. However, most pressure cookers generally have low integration, with the pressure-limiting component and switching component operating independently, resulting in a complex structure, higher cost, and increased size and maintenance difficulty.

[0064] In this embodiment of the utility model, the switching component 150 is provided with a mounting hole 58, and the pressure limiting component 151 includes a steam exhaust valve 20 and a steam exhaust pipe 55. The steam exhaust pipe 55 passes through the mounting hole 58 and is connected to the cooking cavity. The steam exhaust valve 20 is located at the end of the steam exhaust pipe 55 away from the cooking cavity.

[0065] Understandably, the set pressure is related to the rated pressure of the cooking appliance and the area of ​​the surface it is subjected to. Specifically, the safe pressure can be 1.5 to 2 times the rated pressure, and the set pressure for a certain area is the safe pressure multiplied by the area of ​​that area.

[0066] In this embodiment of the invention, under pressurized cooking mode, the exhaust valve 20 can be fitted onto the steam outlet 85 of the exhaust pipe. The exhaust area corresponding to the steam outlet 85 of the exhaust pipe is S1(m²). 2 The portion of the exhaust valve 20 with area S1 experiences pressure within the cooking chamber equal to the cooking chamber pressure multiplied by S1. The set pressure is the safe pressure multiplied by S1, where the safe pressure can be 1.5 to 2 times the rated pressure. In one example, if the rated pressure of the cooking appliance is 70 kPa, then the safe pressure is 105 to 140 kPa, and the set pressure is 105 × S1 to 140 × S1 kN.

[0067] It is understood that the weight of the exhaust valve 20 can be set according to the set pressure and the diameter of the exhaust pipe, and this utility model does not make specific limitations here.

[0068] In some embodiments, the vent area of ​​the vent 17 is configured to enable pressureless cooking when the vent 17 is open.

[0069] In this way, the exhaust area can meet the exhaust requirements of cooking appliances in pressureless cooking mode, so that pressureless cooking can be achieved without reducing the power of cooking appliances, thus improving the user experience.

[0070] Specifically, the cooking appliance can operate in both pressurized cooking mode and pressureless cooking mode. In pressurized cooking mode, the switching component 150 can close the vent 17 to seal the cooking chamber, thereby allowing pressurized cooking of the food. In pressureless cooking mode, the switching component 150 can fully open the vent 17 to connect the cooking chamber to the outside environment, thereby allowing pressureless cooking of the food.

[0071] It should be noted that the pressureless cooking described in this invention refers to cooking with a pressure of less than or equal to 4 kPa within the cooking chamber 250 during operation. The venting area of ​​the vent 17 is configured to enable pressureless cooking when the vent 17 is open. 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, enabling pressureless cooking. In another embodiment, when the vent 17 is partially open, a portion of the venting area of ​​the vent 17 is used for venting, enabling pressureless cooking.

[0072] When the vent 17 is opened to a certain size (fully or partially), the vent area of ​​the vent 17, which enables pressureless cooking, is related to the power of the cooking appliance. Generally, the higher the power of the cooking appliance, 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 can be determined through simulation, testing, and empirical values. In some examples, please refer to... Figure 18 , Figure 18 The relationship between the vent area of ​​the vent hole 17 and the power of the cooking appliance is shown under pressureless cooking (the pressure inside the cooking chamber 250 is 4 kPa).

[0073] 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.

[0074] 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 in the pressureless cooking mode, thereby enabling pressureless cooking without reducing the power of the cooking appliance and improving the user experience.

[0075] 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 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.

[0076] 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 venting 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 is operating in pressureless cooking mode, steam can be quickly and safely discharged from the cooking chamber, thus enabling pressureless cooking even without reducing the heating power of the cooking appliance. The number of vents 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 9 The number of exhaust vents 17 can be 2.

[0077] Please see Figures 10 to 17 The switching component 150 includes a first seal 14 and a second seal 11, with a steam vent 17 disposed on the second seal 11. The first seal 14 and the second seal 11 can generate relative movement to open and close the steam vent 17, and adjust the opening area of ​​the steam vent 17. When the entire steam vent area of ​​the steam vent 17 is used for steam venting (the steam vent 17 is fully open), a pressureless cooking mode of the cooking appliance can be achieved. Optionally, the opening of the steam vent 17 refers to any state other than when the steam vent 17 is closed. When a portion of the steam vent area of ​​the steam vent 17 is used for steam venting (the steam vent 17 is partially open), pressurized cooking modes with different pressures can be achieved. With a fixed heating power of the cooking appliance, the larger the area of ​​the steam vent 17 used for steam venting, the lower the pressure inside the cooking chamber.

[0078] Please combine Figure 10 , Figure 13 and Figure 16The first seal 14 can close the vent 17 to seal the cooking chamber, preventing steam from escaping from the cooking appliance. The pressure inside the cooking chamber is maintained at the level required for cooking, and at this time, the opening area of ​​the vent 17 is zero. Figure 11 and Figure 14 In this process, the first sealing element 14 can open a portion of the vent hole 17, allowing the cooking chamber to communicate with the outside through the vent hole 17. Some steam inside the cooking chamber can escape from the cooking appliance. The pressure inside the cooking chamber decreases as the area of ​​the vent hole 17 that is opened increases. At this point, the opening area of ​​the vent hole 17 is smaller than the venting area. Please refer to... Figure 12 , Figure 15 and Figure 17 The first sealing member 14 can fully open the vent hole 17, allowing the cooking chamber to communicate with the outside through the vent hole 17. Most of the steam inside the cooking chamber can escape from the cooking appliance, leaving the cooking chamber in a pressureless state, enabling pressureless cooking. In this case, the opening area of ​​the vent hole is equal to the venting area. In summary, in this embodiment of the invention, the cooking appliance can adjust the opening area of ​​the vent hole 17 through the relative movement between the first sealing member 14 and the second sealing member 11, allowing the cooking appliance to switch between pressurized and pressureless cooking. Furthermore, pressureless cooking can be achieved without reducing the power of the cooking appliance, improving the user experience.

[0079] Optionally, the pot body includes a heating element and an inner pot, the inner pot having a cooking cavity, and the heating element may be located below the inner pot. When the heating element is activated, it heats the inner pot. The power of the heating element is adjustable to meet different heating needs.

[0080] In some embodiments, the switching assembly 150 includes a first seal 14, which is movable and can switch back and forth between a first position and a second position. In the first position, the first seal 14 closes the vent 17 to seal the cooking chamber, and in the second position, the first seal 14 opens the vent 17 to allow the cooking chamber to communicate with the outside of the cooking chamber through the vent 17.

[0081] Thus, the first seal 14 can switch back and forth between the first position and the second position, which can effectively control the vent 17 and provide efficient sealing and safe venting of the cooking cavity.

[0082] Specifically, when the first seal 14 is in the first position, it can seal the cooking cavity by closing the vent 17, thereby putting the cooking appliance in a pressurized cooking mode. When the first seal 14 is in the second position, it can open the vent 17 to connect the cooking cavity to the outside through the vent 17, thereby putting the cooking appliance in a pressureless cooking mode. When the first seal 14 is in the second position, it can fully open the vent 17.

[0083] In some embodiments, the switching assembly 150 includes a second seal 11 with a vent hole 17, the second seal 11 includes a first contact plane 26, the first seal 14 includes a second contact plane 29, and the first contact plane 26 and the second contact plane 29 are parallel to and in contact with each other.

[0084] The switching component 150 is configured to seal the cooking chamber 250 by closing the vent hole 17 through the tight contact between the first contact plane 26 and the second contact plane 29 when the second seal 11 and the first seal 14 move relative to each other, and to open the vent hole 17 to allow the cooking chamber 250 to communicate with the outside of the cooking chamber 250 through the vent hole 17.

[0085] Thus, the first contact plane 26 and the second contact plane 29 are parallel to each other and in contact, which allows the exhaust port 17 to be opened and closed and the exhaust area of ​​the exhaust port 17 to be adjusted.

[0086] Specifically, the second seal 11 and the first seal 14 can be ceramic sheets. The first seal 14 and the second seal 11 have a sheet-like structure, meaning they are relatively thin, 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, which has a large area, allowing for a larger vent area (opening area) and reducing the height of the switching assembly 150, thus reducing the space occupied by the cooking appliance.

[0087] Please combine Figures 10 to 17 The interface connecting the second seal 11 and the first seal 14 is planar. Specifically, the first contact plane 26 between the second seal 11 and the first seal 14 is planar, and the second contact plane 29 between the first seal 14 and 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 the first seal 14 and the second seal 11 to open and close the vent hole 17 and adjust the vent area of ​​the vent hole 17. This also makes the relative movement between the second seal 11 and the first seal 14 smoother. Because the contact surfaces are very smooth, the coefficient of friction μ between them is very low, which significantly reduces the operating force and makes it easier to switch between pressurized and unpressurized cooking.

[0088] In this embodiment of the utility model, the first sealing member 14 is located above the second sealing member 11, and the second sealing member 11 is closer to the cooking cavity. The side of the first sealing member 14 facing the cooking cavity is the second contact plane 29, and the side of the second sealing member 11 away from the cooking cavity is the first contact plane 26. The second sealing member 11 is provided with an exhaust hole 17 that is connected vertically. The first sealing member 14 and the second sealing member 11 are in contact with each other through the second contact plane 29 and the first contact plane 26.

[0089] Optionally, in one embodiment, the second seal 11 is positioned above the first seal 14, with the first seal 14 being closer to the cooking cavity. The side of the first seal 14 facing away from the cooking cavity is the second contact plane 29, and the side of the second seal 11 facing the cooking cavity is the first contact plane 26. The second seal 11 has an exhaust hole 17 that is vertically connected, and the first seal 14 and the second seal 11 are fitted together through the two contact planes 29 and the first contact plane 26.

[0090] 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.

[0091] In this way, the pressure inside the cooking cavity 250 can be adjusted by the opening area of ​​the vent 17.

[0092] 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.

[0093] Please combine Figure 10 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 11 In 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 12 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 can perform pressureless cooking.

[0094] 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 pressureless cooking. In such an embodiment, the first seal 14 can further reduce the open area of ​​the vent 17 (greater than zero), enabling micro-pressure cooking (a low-pressure pressurized cooking mode). The first seal 14 can further increase the open area of ​​the vent 17, enabling pressureless cooking.

[0095] For example, when the minimum opening area of ​​the vent hole 17 is 80% × S, a portion of the vent area of ​​the vent hole 17 can be used for venting, allowing the cooking appliance to achieve pressureless cooking (the pressure inside the cooking cavity 250 is less than or equal to 4 kPa). When the first seal 14 moves to make the opening area of ​​the vent hole 17 50% × S, the cooking appliance performs micro-pressure cooking (e.g., the pressure inside the cooking cavity is greater than 4 kPa). When the first seal 14 moves to make the opening area of ​​the vent hole 17 90% × S, the cooking appliance performs pressureless cooking, at which point the pressure inside the cooking cavity 250 is less than the pressure inside the cooking cavity 250 corresponding to an opening area of ​​80% × S. In some embodiments, the first seal 14 is located on the side of the second seal 11 facing away from the lid 300.

[0096] Thus, the second seal 11 is closer to the cooking chamber than the first seal 14, which makes the vent 17 also closer to the cooking chamber. When the vent 17 connects the cooking chamber to the outside, the steam can reach the vent 17 more quickly, ensuring that the steam can escape from the cooking chamber quickly, reducing the time for pressure release, and improving the cooking efficiency of the cooking appliance to a certain extent.

[0097] Specifically, please combine Figures 10 to 17 The first seal 14 and the second seal 11 are stacked on top of each other, with the first seal 14 above the second seal 11, so that the first seal 14 and the second seal 11 can move relative to each other to open or close the vent hole 17.

[0098] In some embodiments, the first seal 14 and the second seal 11 are stacked in the height direction of the cooking appliance, and the mounting hole 58 passes through the first seal 14 and the second seal 11. The first seal 14 or the second seal 11 can rotate around the vent pipe 55 to open and close the vent hole 17.

[0099] Thus, the stacked first seal 14 and second seal 11 can reduce the space occupied by the seals on the pot lid assembly 400, making the switching assembly 150 more compact. The rotational movement can also reduce the space occupied.

[0100] Specifically, please combine Figure 3 and Figure 4The first seal 14 and the second seal 11 are stacked, with the first seal 14 above the second seal 11, allowing them to move relative to each other to open or close the vent 17. The second seal 11 is closer to the cooking chamber than the first seal 14, which also brings the vent 17 closer to the cooking chamber. When the vent 17 connects the cooking chamber to the outside, steam can reach the vent 17 more quickly. This design ensures that steam can escape from the cooking chamber quickly, reducing the time required to release pressure and improving the cooking efficiency of the appliance to some extent.

[0101] In one embodiment, the first seal 14 is rotatable and the second seal 11 is fixed. The first seal 14 is rotatable about the exhaust pipe 55 to open and close the exhaust port 17. In another embodiment, the second seal 11 is rotatable and the first seal 14 is fixed. The second seal 11 is rotatable about the exhaust pipe 55 to open and close the exhaust port 17.

[0102] In some embodiments, the vent valve 20, the first seal 14, and the second seal 11 are arranged from top to bottom in the height direction of the cooking appliance.

[0103] In this way, by arranging the exhaust valve 20, the first seal 14, and the second seal 11 vertically in the height direction, the vertical space of the cooking appliance is effectively utilized, and the horizontal area occupied is reduced.

[0104] Specifically, in this embodiment of the utility model, the mounting hole 58 passes through the first sealing member 14 and the second sealing member 11 in the vertical direction. The end of the exhaust pipe 55 facing the cooking cavity passes through the first sealing member 14 and the second sealing member 11 in sequence and can extend into the cooking cavity. The end of the exhaust pipe 55 away from the cooking cavity is connected to the exhaust valve 20, thereby realizing that the exhaust valve 20, the first sealing member 14 and the second sealing member 11 are arranged from top to bottom.

[0105] In some embodiments, the pot lid 300 is provided with a steam vent 124, the switching device 100 covers the steam vent 124, the pot lid assembly 400 includes a support member 82, the support member 82 is connected to the wall of the steam vent 124, the surface of the support member 82 away from the cooking cavity is flush with the surface of the pot lid 300 away from the cooking cavity, and the support member 82 supports the second sealing member 11.

[0106] In this way, the support member 82 can provide stable support for the second seal member 11, ensuring that it can fit tightly against the surface of the lid 300 away from the cooking cavity, thereby achieving a good sealing effect while improving the stability of the cooking appliance.

[0107] Specifically, the pot lid 300 is provided with a steam vent 124, which connects to the vent 17 and the cooking chamber. The steam vent 124 is used to guide the steam in the cooking chamber to the vent 17 so that the steam can be guided to the outside when the vent 17 is opened. Please refer to... Figure 1 The mounting hole 58 penetrates the middle of the support member 82 and is used to install the exhaust pipe 55. The support member 82 is provided with support parts 61 connected to the middle position of the support member 82 at intervals along the circumference of the mounting hole 58. The support parts 61 are fixedly connected to the hole wall of the steam vent 124. The surface of the support member 82 away from the cooking cavity is flush with the surface of the pot lid 300 away from the cooking cavity, so that the second sealing member 11 can fit tightly with the surface of the support member 82 away from the cooking cavity and the surface of the pot lid 300 away from the cooking cavity to ensure good sealing. Multiple through holes are formed between the multiple support parts 61, and the multiple through holes can jointly form the steam vent 124.

[0108] In some embodiments, the second seal 11 is fixed, and the first seal 14 is capable of planar movement relative to the second seal 11 on the first contact plane 26 to open and close the vent hole 17, the opening of the vent hole 17 on the first contact plane 26 being located on the movement path of the first seal 14.

[0109] Thus, when the first seal 14 moves planar relative to the second seal 11 on the first contact plane 26, it can open or close the vent hole 17. Adjusting the opening area of ​​the vent hole 17 can regulate the pressure inside the cooking cavity, allowing the cooking appliance to flexibly adjust the internal pressure according to different cooking needs, thereby enhancing cooking efficiency and safety to a certain extent.

[0110] Specifically, to allow the cooking appliance to flexibly adjust its internal pressure according to different cooking needs and improve cooking results, the opening area of ​​the vent 17 can be varied. The second seal 11 is stacked on top of the first seal 14, with the second seal 11 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 and in close contact. The first seal 14 can move planarly relative to the second seal 11 on the first contact plane 26. The vent 17 is located on the movement path of the first seal 14, which can reduce the height of the lid assembly 400 to some extent. Figures 10 to 12 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 13 to 17 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.

[0111] Please combine Figures 10 to 17 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 inside the cooking chamber. The cooking appliance 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.

[0112] Understandably, in Figures 10 to 12 In this process, the planar motion of the first seal 14 relative to the second seal 11 is a rotational motion. At this time, the mounting hole 58 penetrates both the first seal 14 and the second seal 11 so that the exhaust pipe 55 can pass through the mounting hole 58 and connect with both the first seal 14 and the second seal 11. Figures 13 to 17 In the process, the planar motion of the first seal 14 relative to the second seal 11 is a translational motion. At this time, the mounting hole 58 passes through the second seal 11 so that the exhaust pipe 55 can pass through the mounting hole 58 and thus connect with the second seal 11. The exhaust hole 17 is located on the movement path of the first seal 14, and the mounting hole 58 is located in the area that is not affected by the movement of the first seal 14.

[0113] In some embodiments, the switching assembly 150 includes a housing 32 and an operating assembly 64. The housing 32 is fixed to the pot lid 300 and has a receiving cavity 38. A first seal 14 and a second seal 11 are disposed in the receiving cavity 38. A portion of the operating assembly 64 is located in the receiving cavity 38 and connected to the first seal 14, while another portion extends out of the receiving cavity 38. The operating assembly 64 is configured to drive the first seal 14 to move relative to the second seal 11 during movement.

[0114] Thus, a portion of the operating component 64 is located inside the accommodating cavity 38 and connected to the first sealing member 14, while the other portion extends out of the accommodating cavity 38, making it convenient to control the sealing state of the cooking appliance through the operating component 64, thereby achieving the switching between pressurized cooking mode and pressureless cooking mode.

[0115] Specifically, please refer to Figure 5 The housing 32 has a receiving cavity 38, which can accommodate the first sealing member 14 and the second sealing member 11 stacked together. The operating component 64 is used to operate the first sealing member 14 to move relative to the second sealing member 11, thereby realizing the switching between pressurized cooking mode and pressureless cooking mode. The operation component 64 can be driven to extend out of the receiving cavity 38 to operate the first sealing member 14 to move relative to the second sealing member 11.

[0116] Optionally, the operation component 64 can be operated manually or electrically. For example, in one embodiment, the pot lid assembly 400 may include a motor and a connector. The connector may connect the output shaft of the motor and the operation component 64. When the motor is running, it drives the operation component 64 to rotate back and forth or translate back and forth through the connector, thereby causing the first seal 14 to rotate back and forth or translate back and forth relative to the second seal 11 to open and close the vent hole 17.

[0117] In one embodiment, a portion of the operating component 64 may be exposed from the lid assembly 400, and the user may operate the operating component 64 by hand or tool in a rotating or translating manner to move the first seal 14 back and forth relative to the second seal 11 to open and close the vent 17.

[0118] In some embodiments, the operating assembly 64 includes an operating lever 52 and a lever 70. One end of the operating lever 52 is located inside the receiving cavity 38 and connected to the first seal 14, while the other end of the operating lever 52 is located outside the receiving cavity 38 and connected to the lever 70. A mounting hole 58 passes through the lever 70 and the operating lever 52. The lever 70 has a receiving groove 127 on its side away from the operating lever 52, and the exhaust valve 20 is partially located in the receiving groove 127.

[0119] In this way, the first seal 14 can be easily operated by lever 70, which makes it convenient for users to switch cooking modes and at the same time avoids safety risks during the switching process to a certain extent.

[0120] Specifically, because the vent valve 20, the first seal 14, and the second seal 11 are arranged from top to bottom along the height of the cooking appliance, and the operating lever 52 is located between the first seal 14 and the vent valve 20, the space for directly operating the operating lever 52 becomes relatively narrow, especially when the cooking appliance is small, the operating space is even more limited. At the same time, under high temperature conditions, the operability of the operating lever 52 is limited, making it inconvenient for the user to operate it directly. To avoid the safety risks caused by directly operating the operating lever 52 to a certain extent, in this embodiment of the invention, the lever 70 is connected to the portion of the operating lever 52 located outside the receiving cavity 38. Thus, when the user or a motor drives the lever 70, the lever 70 can drive the operating lever 52 to rotate, thereby rotating the first seal 14 and opening and closing the vent hole 17.

[0121] Understandably, the exhaust valve 20 is partially located in the receiving groove 127 on the side of the lever 70 opposite to the operating lever 52. A portion of the exhaust valve 20 is located above the lever 70. The end of the exhaust pipe 55 away from the cooking cavity passes through the second seal 11, the first seal 14, the operating lever 52, and the mounting hole 58 on the lever 70 in sequence, thereby connecting with the exhaust valve 20.

[0122] Optionally, please combine Figure 1 and Figure 3 The pot lid assembly 400 includes an inner lid 401, and a pot lid 300 can be disposed inside the inner lid 401. The switching device 100 can be connected to the pot lid 300 and pass through a perforation 402 on the inner lid 401. The inner lid 401 is provided with a guide ring 403, which is arranged around the perforation 402. The lever 70 has a guide groove 71 on its surface facing the inner lid 401, and the guide ring 403 is partially disposed in the guide groove 71, thereby making the movement of the lever 70 more stable.

[0123] In some embodiments, the operating component 64 includes a pressure plate 67 and a first sealing ring 88. The first sealing ring 88 seals the connection between the housing 32 and the operating rod 52. The pressure plate 67 is sleeved on the outside of the housing 32 and connects the operating rod 52 and the lever 70. The pressure plate 67 presses the first sealing ring 88.

[0124] Thus, the pressure plate 67 and the first sealing ring 88 can prevent steam from escaping from the gap between the housing 32 and the operating rod 52 to a certain extent, ensuring the safe discharge of steam.

[0125] Specifically, in the height direction of the cooking appliance, the operating lever 52 extends from the housing 32 and connects to the lever 70. The pressure plate 67 connects to the portion of the operating lever 52 located between the lever 70 and the housing 32. The mounting hole 58 located between the operating lever 52 and the lever 70 forms a steam outlet channel. When the vent hole 17 is opened, the steam in the cooking cavity flows to the outside through the vent hole 17. The steam exits to the outside through the steam inlet hole 124, the vent hole 17, the accommodating cavity 38, and the steam outlet channel in sequence. During the flow from the accommodating cavity 38 to the steam outlet channel, to prevent steam from overflowing from the gap between the housing 32 and the operating lever 52, a first sealing ring 88 is provided between the housing 32 and the operating lever 52, and the first sealing ring 88 is pressed tightly by the pressure plate 67.

[0126] Optionally, when the lever 70 drives the operating lever 52 to rotate, the lever 70 also drives the pressure plate 67 to rotate synchronously. Optionally, when the lever 70 drives the operating lever 52 to rotate, the pressure plate 67 can be fixed.

[0127] In some embodiments, one of the first sealing member 14 and the operating lever 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 and the first limiting groove 76 are connected in cooperation so that when the operating lever 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.

[0128] Thus, the first limiting block 79 can cooperate with the first limiting groove 76, so that when the operating rod 52 moves, it can drive the first sealing member 14 to make planar movement on the second sealing member 11.

[0129] Specifically, in the embodiments of this utility model, please refer to... Figure 6 and Figure 7 The first limiting groove 76 is disposed on the surface of the first sealing member 14 facing away from the cooking cavity, and the first limiting block 79 is disposed on the surface of the operating rod 52 facing the cooking cavity. In other embodiments, the first limiting groove 76 may be disposed on the surface of the operating rod 52 facing the cooking cavity, and the first limiting block 79 may be disposed on the surface of the first sealing member 14 facing away from the cooking cavity. The first limiting block 79 can be engaged in the first limiting groove 76, so that the operating rod 52 and the first sealing member 14 are tightly fitted, and when the operating rod 52 moves, it can drive the first sealing member 14 to perform planar movement on the second sealing member 11.

[0130] Optionally, in this embodiment of the invention, the operating lever 52 and the first sealing member 14 are connected by a limiting groove and a limiting block. In other embodiments, please refer to... Figure 8 The operating lever 52 and the first seal 14 can be a single, integrally molded structure. The shape of the operating lever 52 can be arbitrary, such as... Figure 8 As shown, the shape of the operating lever 52 can be a regular hexagonal prism.

[0131] In some implementations, please refer to Figure 1 and Figure 3 The pot lid 300 is provided with a steam vent 17 and includes a third contact plane 72, which is parallel to and in contact with the second contact plane 29.

[0132] The switching component 150 is configured to close the vent 17 to seal the cooking chamber 250 when the lid 300 and the first seal 14 move relative to each other, through the close contact between the third contact plane 72 and the second contact plane 29, and to open the vent 17 to allow the cooking chamber 250 to communicate with the outside of the cooking chamber 250 through the vent 17.

[0133] Thus, the pot lid 300 is equipped with a steam vent 17, which can effectively simplify the switching device 100 to a certain extent and realize the miniaturization of cooking utensils.

[0134] Specifically, the interface connecting the lid 300 and the first sealing element 14 is planar. Specifically, the third contact plane 72 where the lid 300 contacts the first sealing element 14 is planar, and the second contact plane 29 where the first sealing element 14 contacts the lid 300 is also planar. The third contact plane 72 and the second contact plane 29 are parallel and in contact with each other, allowing the first sealing element 14 and the lid 300 to open and close the vent hole 17 and adjust the vent area of ​​the vent hole 17. This also makes the relative movement between the lid 300 and the first sealing element 14 smoother. 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 to switch between pressure cooking and non-pressure cooking to a certain extent.

[0135] In this embodiment of the invention, the switching device 100 includes a pressure limiting component 151 and a switching component 150. The switching component 150 includes a first sealing member 14, a housing 32, and an operating component 64. The side of the first sealing member 14 facing the cooking cavity covers the vent hole 17 on the pot lid 300. The opening of the vent hole 17 on the third contact plane 72 is located on the movement path of the first sealing member 14. The first sealing member 14 can rotate relative to the pot lid 300 on the third contact plane 72. When the first sealing member 14 is in the first position, the first sealing member 14 closes the vent hole 17 to seal the cooking cavity. When the first sealing member 14 is in the second position, the first sealing member 14 opens the vent hole 17 to allow the cooking cavity to communicate with the outside through the vent hole.

[0136] It is understandable that the mounting hole 58 can pass through the first seal 14, the housing 32, and the operating component 64, and the exhaust pipe 55 of the pressure limiting component 151 can pass through the mounting hole 58, thereby realizing the integration of the pressure limiting component 151 and the switching component 150, saving the installation space of the switching device 100 to a certain extent, which is conducive to the miniaturization of cooking appliances.

[0137] In some embodiments, the cooking appliance satisfies at least one of the following: the steam vent 17 has a steam vent area 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 and flatness of the first contact plane 26 of the cooking appliance that contacts the second seal 11 and the first seal 14 are not greater than 3.2 micrometers; the surface roughness and flatness of the second contact plane 29 of the first seal 14 and the second seal 11 are not greater than 3.2 micrometers.

[0138] In this way, the switching effect between pressure cooking and non-pressure cooking can be guaranteed to a certain extent.

[0139] Specifically, in one embodiment, the cooking appliance satisfies that 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 In one embodiment, the cooking appliance is made of a hard material, wherein the Vickers hardness of the second seal 11 and the first seal 14 is greater than or equal to 50 HV5. In another embodiment, the cooking appliance has a surface roughness of no more than 3.2 micrometers and a flatness of no more than 3.2 micrometers on the first contact surface 26, and a surface roughness of no more than 3.2 micrometers and a flatness of no more than 3.2 micrometers on the second contact surface 29.

[0140] In one embodiment, the cooking appliance satisfies 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 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 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 cooking appliance has a surface roughness of no more than 3.2 micrometers and a flatness of no more than 3.2 micrometers on the first contact plane 26, and a surface roughness of no more than 3.2 micrometers and a flatness of no more than 3.2 micrometers on the second contact plane 29. In one embodiment, the cooking appliance satisfies that 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, and that the cooking appliance has a surface roughness of no more than 3.2 micrometers and a flatness of no more than 3.2 micrometers on the first contact plane 26, and a surface roughness of no more than 3.2 micrometers and a flatness of no more than 3.2 micrometers on the second contact plane 29.

[0141] In one embodiment, the cooking appliance simultaneously satisfies 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 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 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.

[0142] Please combine Figures 10 to 17The 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, if the vent area of ​​the vent 17 is too small, a pressure-free cooking mode cannot be achieved without reducing the appliance's power. 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 for the vent 17 ensures that the cooking appliance 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 to remain pressure-free during high-power operation (ensuring the pressure inside the cooking cavity 250 is less than 1 kPa), providing a rapid and even heating effect for food to a certain extent.

[0143] 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 (mm) 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.

[0144] When the cooking appliance 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.

[0145] 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.

[0146] 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 second seal 11 and the first seal 14.

[0147] Specifically, please combine Figures 10 to 17 The 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 the second sealing ring 35. Under the pressure provided by the second sealing ring 35 and the pressure within the cooking cavity 250, the first contact surface 26 (cooking appliance) and the second contact surface 29 are tightly fitted together, forming a sealing effect at the contact surface. Simultaneously, the first sealing element 14 moves planarly on the second sealing element 11, opening or closing the vent 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 (cooking appliance) and the second contact surface 29, certain requirements are placed on the surface roughness and flatness of the first contact surface 26 and the second contact surface 29. 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 to switch between pressurized and unpressurized cooking to a certain extent.

[0148] In this embodiment of the invention, the surface roughness of the first contact plane 26 of the cooking appliance 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, thereby making the relative movement between the second sealing member 11 and the first sealing member 14 smoother, and making the first contact plane 26 of the cooking appliance and the second contact plane 29 form a better sealing effect.

[0149] 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.

[0150] Optionally, the surface roughness and flatness of the first contact plane 26 of the cooking appliance may be the same as or different from the surface roughness and flatness of the second contact plane 29.

[0151] In an optional embodiment, the pot lid 300 is provided with a fixing member 91 on the side facing the cooking cavity. The fixing member 91 has an internal thread, and correspondingly, the end of the vent pipe 55 near the cooking cavity has an external thread. The pot lid 300 and the vent pipe 55 are connected by the fixing member 91.

[0152] 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, and the other is provided with a second limiting block 49. The second limiting block 49 is embedded in the second limiting groove so that the housing 32 limits the second sealing member 11.

[0153] Thus, the second limiting block 49 and the second limiting groove can cooperate with each other, so that the housing 32 can restrict the movement of the second seal 11.

[0154] Specifically, in the embodiments of this utility model, please refer to... Figure 5 and Figure 9 The second limiting groove is provided on the side wall of the receiving cavity 38 of the housing 32, and the second limiting block 49 is provided on the circumferential side of the second sealing member 11. In other embodiments, the second limiting groove may be provided on the circumferential side of the second sealing member 11, and the second limiting block 49 may be provided on the side wall of the receiving cavity 38 of the housing 32.

[0155] The second limiting block 49 can be inserted into the second limiting groove, 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).

[0156] This embodiment of the invention does not specifically limit the number of the second limiting groove and the second limiting block 49. In one example, there are two second limiting grooves and two limiting blocks 49. One second limiting block 49 is disposed in a corresponding second limiting groove.

[0157] In an optional embodiment, the first sealing element 14 includes a notch 23, which is disposed on the circumferential side of the first sealing element 14. When the notch 23 is in vertical communication with the vent hole 17, the switching component 150 opens the vent hole 17, connecting the cooking chamber to the outside, and steam can be released; when the notch 23 is not in vertical communication with the vent hole 17, the switching component 150 closes the vent hole 17, the cooking chamber is not in communication with the outside, and remains sealed, preventing steam from escaping from the cooking chamber to the outside. This invention does not specifically limit the number of notches 23; in one example, there are two notches 23, with one notch 23 corresponding to one vent hole 17.

[0158] 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 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.

[0159] In an optional embodiment, the switching assembly 150 includes a second sealing ring 35, a second sealing member 11 and a first sealing member 14 disposed in the accommodating cavity 38. The two ends of the accommodating cavity 38 are respectively provided with a first opening 41 and a second opening 43. The housing of the second sealing ring 35 surrounds the portion of the first opening 41. The switching assembly 150 is sealed to the pot lid 300 through the second sealing ring 35. When the vent hole 17 is open, the cooking cavity communicates with the outside of the cooking cavity through the vent hole 17 and the second opening 43.

[0160] Thus, the second sealing ring 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.

[0161] The second sealing ring 35 can seal the end face of the valve housing 32 and the pot lid 300, preventing steam from leaking out from the gap between the pot lid 300 and the valve housing 32. In summary, the second sealing ring 35 can seal the connection between the switching component 150 and the pot lid 300, preventing steam from leaking out from the gap between the pot lid 300 and the switching component 150 and affecting the cooking effect.

[0162] 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. The first guide portion 106 and the second guide portion are connected to each other to guide the relative movement of the second seal 11 and the first seal 14.

[0163] Thus, the first guide part 106 and the second guide part 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 vent hole 17.

[0164] Specifically, please combine Figure 16 and Figure 17 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. The second guide portion can move on the first guide portion 106. The first guide portion 106 and the second guide portion cooperate and connect to guide the first sealing member 14 to perform relative planar movement with respect to 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. In one example, the first guide portion 106 can be a groove, and the second guide portion can be a protrusion that slides within the groove.

[0165] When the second seal 11 and the first seal 14 are in Figure 16 When the first seal 14 is in the middle position, the vent 17 is completely blocked, sealing the cooking chamber and preventing steam from escaping from the cooking appliance. The pressure inside the cooking chamber remains 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 with the first seal 14... Figure 17 In the cooking cavity, the vent 17 is not obstructed, allowing the cooking cavity to communicate with the outside world through the vent 17. Most of the steam in the cooking cavity can escape from the cooking appliance, and the cooking cavity 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 can be specifically limited according to actual needs, and this embodiment of the utility model does not make specific limitations in this regard.

[0166] 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.

[0167] 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 device, and a steam vent, wherein the switching device 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 device includes a switching component and a pressure limiting component. The switching component is configured to switch between a pressurized cooking mode and a pressureless cooking mode of the cooking appliance. In the pressurized cooking mode, the switching component closes the vent hole to seal the cooking chamber. In the pressureless cooking mode, the switching component opens the vent hole to connect the cooking chamber to the outside through the vent hole. The switching component is provided with a mounting hole. The pressure limiting component includes a steam vent valve and a steam vent pipe. The steam vent pipe passes through the mounting hole and is connected to the cooking chamber. The steam vent valve is located at the end of the steam vent pipe away from the cooking chamber. The pressure limiting component is configured such that when the pressure in the cooking chamber is less than or equal to a set pressure, the steam vent valve seals the steam vent pipe; when the pressure in the cooking chamber is greater than the set pressure, the steam vent valve opens the steam vent pipe, allowing the cooking chamber to connect to the outside of the cooking chamber through the steam vent pipe.

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 switching component includes a first seal that is movable and 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.

4. The cooking utensil according to claim 3, characterized in that, The switching component includes a second seal, the second seal having the vent hole, the second seal including a first contact plane, the first seal including a second contact plane, the first contact plane and the second contact plane being 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.

5. The cooking utensil according to claim 4, 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.

6. The cooking utensil according to claim 4, characterized in that, The first seal is located on the side of the second seal that is away from the pot lid.

7. The cooking utensil according to claim 4, characterized in that, In the height direction of the cooking appliance, the first seal and the second seal are stacked, the mounting hole passes through the first seal and the second seal, and the first seal or the second seal can rotate around the vent pipe to open and close the vent hole.

8. The cooking utensil according to claim 7, characterized in that, In the height direction of the cooking appliance, the exhaust valve, the first seal and the second seal are arranged from top to bottom.

9. The cooking utensil according to claim 4, characterized in that, The pot lid is provided with a steam vent, the switching device covers the steam vent, the pot lid assembly includes a support member, the support member is connected to the wall of the steam vent, the surface of the support member away from the cooking cavity is flush with the surface of the pot lid away from the cooking cavity, and the support member supports the second sealing member.

10. The cooking utensil according to claim 4, characterized in that, The second seal is fixed, and the first seal is capable of planar movement relative to the second seal on the first contact plane to open and close the vent hole. The opening of the vent hole on the first contact plane is located on the movement path of the first seal.

11. The cooking utensil according to claim 10, characterized in that, The switching assembly includes a housing and an operating assembly. The housing is fixed to the pot lid and has a receiving cavity. The first seal and the second seal are disposed in the receiving cavity. A portion of the operating assembly is located in the receiving cavity and connected to the first seal, while another portion extends out of the receiving cavity. The operating assembly is configured to drive the first seal to move relative to the second seal during movement.

12. The cooking utensil according to claim 11, characterized in that, The operating component includes an operating lever and a lever. One end of the operating lever is located inside the accommodating cavity and connected to the first sealing element. The other end of the operating lever is located outside the accommodating cavity and connected to the lever. The mounting hole penetrates the lever and the operating lever. The lever has a receiving groove on its side away from the operating lever. The exhaust valve is partially located in the receiving groove.

13. The cooking utensil according to claim 12, characterized in that, The operating component includes a pressure plate and a first sealing ring. The first sealing ring seals and connects the housing and the operating rod. The pressure plate is sleeved on the outside of the housing and connects the operating rod and the lever. The pressure plate presses the first sealing ring tightly.

14. The cooking utensil according to claim 12, characterized in that, One of the first sealing element and the operating rod 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 cooperation so that when the operating rod moves, the first sealing element is driven to move through the cooperation of the first limiting block and the first limiting groove.

15. The cooking utensil according to claim 4, characterized in that, The pot lid is provided with the steam vent, and the pot lid includes a third contact plane, which is parallel to and in contact with the second contact plane. The switching component is configured to close the vent hole to seal the cooking cavity by means of close contact between the third contact plane and the second contact plane when the lid and the first seal move relative to each other, and to open the vent hole to allow the cooking cavity to communicate with the outside of the cooking cavity through the vent hole.

16. The cooking utensil according to claim 4, 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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